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lond
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Thu Jun 17 11:02:25 2004 UTC (19 years, 10 months ago) by
foxr
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If the certificate files or host key are missing, than
switch to insecure authentication if allowed. The idea
is this: After an upgrade to lond/lond ssl, you won't in general
have your signed host certificate yet. We want to support uninterrupted
service until your certs are granted, so although the software is ssl
capable, it must, in the interim, do insecure authentication, if permitted
by the administrators.
One case not handled, and left not handled: if the lonCerts directory does not
exist the init:local key exchange cannot work. This case can be ignored because
that diretory will be created as part of the update/upgrade. If it does not exist
it's a sign of some other serious problem that ought to be fixed IMHO.
1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.196 2004/06/17 11:02:25 foxr Exp $
6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27:
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:
54: my $DEBUG = 11; # Non zero to enable debug log entries.
55:
56: my $status='';
57: my $lastlog='';
58:
59: my $VERSION='$Revision: 1.196 $'; #' stupid emacs
60: my $remoteVERSION;
61: my $currenthostid;
62: my $currentdomainid;
63:
64: my $client;
65: my $clientip; # IP address of client.
66: my $clientdns; # DNS name of client.
67: my $clientname; # LonCAPA name of client.
68:
69: my $server;
70: my $thisserver; # DNS of us.
71:
72: #
73: # Connection type is:
74: # client - All client actions are allowed
75: # manager - only management functions allowed.
76: # both - Both management and client actions are allowed
77: #
78:
79: my $ConnectionType;
80:
81: my %hostid; # ID's for hosts in cluster by ip.
82: my %hostdom; # LonCAPA domain for hosts in cluster.
83: my %hostip; # IPs for hosts in cluster.
84: my %hostdns; # ID's of hosts looked up by DNS name.
85:
86: my %managers; # Ip -> manager names
87:
88: my %perlvar; # Will have the apache conf defined perl vars.
89:
90: #
91: # The array below are password error strings."
92: #
93: my $lastpwderror = 13; # Largest error number from lcpasswd.
94: my @passwderrors = ("ok",
95: "lcpasswd must be run as user 'www'",
96: "lcpasswd got incorrect number of arguments",
97: "lcpasswd did not get the right nubmer of input text lines",
98: "lcpasswd too many simultaneous pwd changes in progress",
99: "lcpasswd User does not exist.",
100: "lcpasswd Incorrect current passwd",
101: "lcpasswd Unable to su to root.",
102: "lcpasswd Cannot set new passwd.",
103: "lcpasswd Username has invalid characters",
104: "lcpasswd Invalid characters in password",
105: "11", "12",
106: "lcpasswd Password mismatch");
107:
108:
109: # The array below are lcuseradd error strings.:
110:
111: my $lastadderror = 13;
112: my @adderrors = ("ok",
113: "User ID mismatch, lcuseradd must run as user www",
114: "lcuseradd Incorrect number of command line parameters must be 3",
115: "lcuseradd Incorrect number of stdinput lines, must be 3",
116: "lcuseradd Too many other simultaneous pwd changes in progress",
117: "lcuseradd User does not exist",
118: "lcuseradd Unable to make www member of users's group",
119: "lcuseradd Unable to su to root",
120: "lcuseradd Unable to set password",
121: "lcuseradd Usrname has invalid characters",
122: "lcuseradd Password has an invalid character",
123: "lcuseradd User already exists",
124: "lcuseradd Could not add user.",
125: "lcuseradd Password mismatch");
126:
127:
128: #------------------------------------------------------------------------
129: #
130: # LocalConnection
131: # Completes the formation of a locally authenticated connection.
132: # This function will ensure that the 'remote' client is really the
133: # local host. If not, the connection is closed, and the function fails.
134: # If so, initcmd is parsed for the name of a file containing the
135: # IDEA session key. The fie is opened, read, deleted and the session
136: # key returned to the caller.
137: #
138: # Parameters:
139: # $Socket - Socket open on client.
140: # $initcmd - The full text of the init command.
141: #
142: # Implicit inputs:
143: # $clientdns - The DNS name of the remote client.
144: # $thisserver - Our DNS name.
145: #
146: # Returns:
147: # IDEA session key on success.
148: # undef on failure.
149: #
150: sub LocalConnection {
151: my ($Socket, $initcmd) = @_;
152: Debug("Attempting local connection: $initcmd client: $clientdns me: $thisserver");
153: if($clientdns ne $thisserver) {
154: &logthis('<font color="red"> LocalConnection rejecting non local: '
155: ."$clientdns ne $thisserver </font>");
156: close $Socket;
157: return undef;
158: }
159: else {
160: chomp($initcmd); # Get rid of \n in filename.
161: my ($init, $type, $name) = split(/:/, $initcmd);
162: Debug(" Init command: $init $type $name ");
163:
164: # Require that $init = init, and $type = local: Otherwise
165: # the caller is insane:
166:
167: if(($init ne "init") && ($type ne "local")) {
168: &logthis('<font color = "red"> LocalConnection: caller is insane! '
169: ."init = $init, and type = $type </font>");
170: close($Socket);;
171: return undef;
172:
173: }
174: # Now get the key filename:
175:
176: my $IDEAKey = lonlocal::ReadKeyFile($name);
177: return $IDEAKey;
178: }
179: }
180: #------------------------------------------------------------------------------
181: #
182: # SSLConnection
183: # Completes the formation of an ssh authenticated connection. The
184: # socket is promoted to an ssl socket. If this promotion and the associated
185: # certificate exchange are successful, the IDEA key is generated and sent
186: # to the remote peer via the SSL tunnel. The IDEA key is also returned to
187: # the caller after the SSL tunnel is torn down.
188: #
189: # Parameters:
190: # Name Type Purpose
191: # $Socket IO::Socket::INET Plaintext socket.
192: #
193: # Returns:
194: # IDEA key on success.
195: # undef on failure.
196: #
197: sub SSLConnection {
198: my $Socket = shift;
199:
200: Debug("SSLConnection: ");
201: my $KeyFile = lonssl::KeyFile();
202: if(!$KeyFile) {
203: my $err = lonssl::LastError();
204: &logthis("<font color=\"red\"> CRITICAL"
205: ."Can't get key file $err </font>");
206: return undef;
207: }
208: my ($CACertificate,
209: $Certificate) = lonssl::CertificateFile();
210:
211:
212: # If any of the key, certificate or certificate authority
213: # certificate filenames are not defined, this can't work.
214:
215: if((!$Certificate) || (!$CACertificate)) {
216: my $err = lonssl::LastError();
217: &logthis("<font color=\"red\"> CRITICAL"
218: ."Can't get certificates: $err </font>");
219:
220: return undef;
221: }
222: Debug("Key: $KeyFile CA: $CACertificate Cert: $Certificate");
223:
224: # Indicate to our peer that we can procede with
225: # a transition to ssl authentication:
226:
227: print $Socket "ok:ssl\n";
228:
229: Debug("Approving promotion -> ssl");
230: # And do so:
231:
232: my $SSLSocket = lonssl::PromoteServerSocket($Socket,
233: $CACertificate,
234: $Certificate,
235: $KeyFile);
236: if(! ($SSLSocket) ) { # SSL socket promotion failed.
237: my $err = lonssl::LastError();
238: &logthis("<font color=\"red\"> CRITICAL "
239: ."SSL Socket promotion failed: $err </font>");
240: return undef;
241: }
242: Debug("SSL Promotion successful");
243:
244: #
245: # The only thing we'll use the socket for is to send the IDEA key
246: # to the peer:
247:
248: my $Key = lonlocal::CreateCipherKey();
249: print $SSLSocket "$Key\n";
250:
251: lonssl::Close($SSLSocket);
252:
253: Debug("Key exchange complete: $Key");
254:
255: return $Key;
256: }
257: #
258: # InsecureConnection:
259: # If insecure connections are allowd,
260: # exchange a challenge with the client to 'validate' the
261: # client (not really, but that's the protocol):
262: # We produce a challenge string that's sent to the client.
263: # The client must then echo the challenge verbatim to us.
264: #
265: # Parameter:
266: # Socket - Socket open on the client.
267: # Returns:
268: # 1 - success.
269: # 0 - failure (e.g.mismatch or insecure not allowed).
270: #
271: sub InsecureConnection {
272: my $Socket = shift;
273:
274: # Don't even start if insecure connections are not allowed.
275:
276: if(! $perlvar{londAllowInsecure}) { # Insecure connections not allowed.
277: return 0;
278: }
279:
280: # Fabricate a challenge string and send it..
281:
282: my $challenge = "$$".time; # pid + time.
283: print $Socket "$challenge\n";
284: &status("Waiting for challenge reply");
285:
286: my $answer = <$Socket>;
287: $answer =~s/\W//g;
288: if($challenge eq $answer) {
289: return 1;
290: }
291: else {
292: logthis("<font color='blue'>WARNING client did not respond to challenge</font>");
293: &status("No challenge reqply");
294: return 0;
295: }
296:
297:
298: }
299:
300: #
301: # GetCertificate: Given a transaction that requires a certificate,
302: # this function will extract the certificate from the transaction
303: # request. Note that at this point, the only concept of a certificate
304: # is the hostname to which we are connected.
305: #
306: # Parameter:
307: # request - The request sent by our client (this parameterization may
308: # need to change when we really use a certificate granting
309: # authority.
310: #
311: sub GetCertificate {
312: my $request = shift;
313:
314: return $clientip;
315: }
316:
317: #
318: # Return true if client is a manager.
319: #
320: sub isManager {
321: return (($ConnectionType eq "manager") || ($ConnectionType eq "both"));
322: }
323: #
324: # Return tru if client can do client functions
325: #
326: sub isClient {
327: return (($ConnectionType eq "client") || ($ConnectionType eq "both"));
328: }
329:
330:
331: #
332: # ReadManagerTable: Reads in the current manager table. For now this is
333: # done on each manager authentication because:
334: # - These authentications are not frequent
335: # - This allows dynamic changes to the manager table
336: # without the need to signal to the lond.
337: #
338:
339: sub ReadManagerTable {
340:
341: # Clean out the old table first..
342:
343: foreach my $key (keys %managers) {
344: delete $managers{$key};
345: }
346:
347: my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
348: if (!open (MANAGERS, $tablename)) {
349: logthis('<font color="red">No manager table. Nobody can manage!!</font>');
350: return;
351: }
352: while(my $host = <MANAGERS>) {
353: chomp($host);
354: if ($host =~ "^#") { # Comment line.
355: logthis('<font color="green"> Skipping line: '. "$host</font>\n");
356: next;
357: }
358: if (!defined $hostip{$host}) { # This is a non cluster member
359: # The entry is of the form:
360: # cluname:hostname
361: # cluname - A 'cluster hostname' is needed in order to negotiate
362: # the host key.
363: # hostname- The dns name of the host.
364: #
365: my($cluname, $dnsname) = split(/:/, $host);
366:
367: my $ip = gethostbyname($dnsname);
368: if(defined($ip)) { # bad names don't deserve entry.
369: my $hostip = inet_ntoa($ip);
370: $managers{$hostip} = $cluname;
371: logthis('<font color="green"> registering manager '.
372: "$dnsname as $cluname with $hostip </font>\n");
373: }
374: } else {
375: logthis('<font color="green"> existing host'." $host</font>\n");
376: $managers{$hostip{$host}} = $host; # Use info from cluster tab if clumemeber
377: }
378: }
379: }
380:
381: #
382: # ValidManager: Determines if a given certificate represents a valid manager.
383: # in this primitive implementation, the 'certificate' is
384: # just the connecting loncapa client name. This is checked
385: # against a valid client list in the configuration.
386: #
387: #
388: sub ValidManager {
389: my $certificate = shift;
390:
391: return isManager;
392: }
393: #
394: # CopyFile: Called as part of the process of installing a
395: # new configuration file. This function copies an existing
396: # file to a backup file.
397: # Parameters:
398: # oldfile - Name of the file to backup.
399: # newfile - Name of the backup file.
400: # Return:
401: # 0 - Failure (errno has failure reason).
402: # 1 - Success.
403: #
404: sub CopyFile {
405:
406: my ($oldfile, $newfile) = @_;
407:
408: # The file must exist:
409:
410: if(-e $oldfile) {
411:
412: # Read the old file.
413:
414: my $oldfh = IO::File->new("< $oldfile");
415: if(!$oldfh) {
416: return 0;
417: }
418: my @contents = <$oldfh>; # Suck in the entire file.
419:
420: # write the backup file:
421:
422: my $newfh = IO::File->new("> $newfile");
423: if(!(defined $newfh)){
424: return 0;
425: }
426: my $lines = scalar @contents;
427: for (my $i =0; $i < $lines; $i++) {
428: print $newfh ($contents[$i]);
429: }
430:
431: $oldfh->close;
432: $newfh->close;
433:
434: chmod(0660, $newfile);
435:
436: return 1;
437:
438: } else {
439: return 0;
440: }
441: }
442: #
443: # Host files are passed out with externally visible host IPs.
444: # If, for example, we are behind a fire-wall or NAT host, our
445: # internally visible IP may be different than the externally
446: # visible IP. Therefore, we always adjust the contents of the
447: # host file so that the entry for ME is the IP that we believe
448: # we have. At present, this is defined as the entry that
449: # DNS has for us. If by some chance we are not able to get a
450: # DNS translation for us, then we assume that the host.tab file
451: # is correct.
452: # BUGBUGBUG - in the future, we really should see if we can
453: # easily query the interface(s) instead.
454: # Parameter(s):
455: # contents - The contents of the host.tab to check.
456: # Returns:
457: # newcontents - The adjusted contents.
458: #
459: #
460: sub AdjustHostContents {
461: my $contents = shift;
462: my $adjusted;
463: my $me = $perlvar{'lonHostID'};
464:
465: foreach my $line (split(/\n/,$contents)) {
466: if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/))) {
467: chomp($line);
468: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
469: if ($id eq $me) {
470: my $ip = gethostbyname($name);
471: my $ipnew = inet_ntoa($ip);
472: $ip = $ipnew;
473: # Reconstruct the host line and append to adjusted:
474:
475: my $newline = "$id:$domain:$role:$name:$ip";
476: if($maxcon ne "") { # Not all hosts have loncnew tuning params
477: $newline .= ":$maxcon:$idleto:$mincon";
478: }
479: $adjusted .= $newline."\n";
480:
481: } else { # Not me, pass unmodified.
482: $adjusted .= $line."\n";
483: }
484: } else { # Blank or comment never re-written.
485: $adjusted .= $line."\n"; # Pass blanks and comments as is.
486: }
487: }
488: return $adjusted;
489: }
490: #
491: # InstallFile: Called to install an administrative file:
492: # - The file is created with <name>.tmp
493: # - The <name>.tmp file is then mv'd to <name>
494: # This lugubrious procedure is done to ensure that we are never without
495: # a valid, even if dated, version of the file regardless of who crashes
496: # and when the crash occurs.
497: #
498: # Parameters:
499: # Name of the file
500: # File Contents.
501: # Return:
502: # nonzero - success.
503: # 0 - failure and $! has an errno.
504: #
505: sub InstallFile {
506:
507: my ($Filename, $Contents) = @_;
508: my $TempFile = $Filename.".tmp";
509:
510: # Open the file for write:
511:
512: my $fh = IO::File->new("> $TempFile"); # Write to temp.
513: if(!(defined $fh)) {
514: &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
515: return 0;
516: }
517: # write the contents of the file:
518:
519: print $fh ($Contents);
520: $fh->close; # In case we ever have a filesystem w. locking
521:
522: chmod(0660, $TempFile);
523:
524: # Now we can move install the file in position.
525:
526: move($TempFile, $Filename);
527:
528: return 1;
529: }
530:
531:
532: #
533: # ConfigFileFromSelector: converts a configuration file selector
534: # (one of host or domain at this point) into a
535: # configuration file pathname.
536: #
537: # Parameters:
538: # selector - Configuration file selector.
539: # Returns:
540: # Full path to the file or undef if the selector is invalid.
541: #
542: sub ConfigFileFromSelector {
543: my $selector = shift;
544: my $tablefile;
545:
546: my $tabledir = $perlvar{'lonTabDir'}.'/';
547: if ($selector eq "hosts") {
548: $tablefile = $tabledir."hosts.tab";
549: } elsif ($selector eq "domain") {
550: $tablefile = $tabledir."domain.tab";
551: } else {
552: return undef;
553: }
554: return $tablefile;
555:
556: }
557: #
558: # PushFile: Called to do an administrative push of a file.
559: # - Ensure the file being pushed is one we support.
560: # - Backup the old file to <filename.saved>
561: # - Separate the contents of the new file out from the
562: # rest of the request.
563: # - Write the new file.
564: # Parameter:
565: # Request - The entire user request. This consists of a : separated
566: # string pushfile:tablename:contents.
567: # NOTE: The contents may have :'s in it as well making things a bit
568: # more interesting... but not much.
569: # Returns:
570: # String to send to client ("ok" or "refused" if bad file).
571: #
572: sub PushFile {
573: my $request = shift;
574: my ($command, $filename, $contents) = split(":", $request, 3);
575:
576: # At this point in time, pushes for only the following tables are
577: # supported:
578: # hosts.tab ($filename eq host).
579: # domain.tab ($filename eq domain).
580: # Construct the destination filename or reject the request.
581: #
582: # lonManage is supposed to ensure this, however this session could be
583: # part of some elaborate spoof that managed somehow to authenticate.
584: #
585:
586:
587: my $tablefile = ConfigFileFromSelector($filename);
588: if(! (defined $tablefile)) {
589: return "refused";
590: }
591: #
592: # >copy< the old table to the backup table
593: # don't rename in case system crashes/reboots etc. in the time
594: # window between a rename and write.
595: #
596: my $backupfile = $tablefile;
597: $backupfile =~ s/\.tab$/.old/;
598: if(!CopyFile($tablefile, $backupfile)) {
599: &logthis('<font color="green"> CopyFile from '.$tablefile." to ".$backupfile." failed </font>");
600: return "error:$!";
601: }
602: &logthis('<font color="green"> Pushfile: backed up '
603: .$tablefile." to $backupfile</font>");
604:
605: # If the file being pushed is the host file, we adjust the entry for ourself so that the
606: # IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible
607: # to conceive of conditions where we don't have a DNS entry locally. This is possible in a
608: # network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
609: # that possibilty.
610:
611: if($filename eq "host") {
612: $contents = AdjustHostContents($contents);
613: }
614:
615: # Install the new file:
616:
617: if(!InstallFile($tablefile, $contents)) {
618: &logthis('<font color="red"> Pushfile: unable to install '
619: .$tablefile." $! </font>");
620: return "error:$!";
621: }
622: else {
623: &logthis('<font color="green"> Installed new '.$tablefile
624: ."</font>");
625:
626: }
627:
628:
629: # Indicate success:
630:
631: return "ok";
632:
633: }
634:
635: #
636: # Called to re-init either lonc or lond.
637: #
638: # Parameters:
639: # request - The full request by the client. This is of the form
640: # reinit:<process>
641: # where <process> is allowed to be either of
642: # lonc or lond
643: #
644: # Returns:
645: # The string to be sent back to the client either:
646: # ok - Everything worked just fine.
647: # error:why - There was a failure and why describes the reason.
648: #
649: #
650: sub ReinitProcess {
651: my $request = shift;
652:
653:
654: # separate the request (reinit) from the process identifier and
655: # validate it producing the name of the .pid file for the process.
656: #
657: #
658: my ($junk, $process) = split(":", $request);
659: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
660: if($process eq 'lonc') {
661: $processpidfile = $processpidfile."lonc.pid";
662: if (!open(PIDFILE, "< $processpidfile")) {
663: return "error:Open failed for $processpidfile";
664: }
665: my $loncpid = <PIDFILE>;
666: close(PIDFILE);
667: logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
668: ."</font>");
669: kill("USR2", $loncpid);
670: } elsif ($process eq 'lond') {
671: logthis('<font color="red"> Reinitializing self (lond) </font>');
672: &UpdateHosts; # Lond is us!!
673: } else {
674: &logthis('<font color="yellow" Invalid reinit request for '.$process
675: ."</font>");
676: return "error:Invalid process identifier $process";
677: }
678: return 'ok';
679: }
680: # Validate a line in a configuration file edit script:
681: # Validation includes:
682: # - Ensuring the command is valid.
683: # - Ensuring the command has sufficient parameters
684: # Parameters:
685: # scriptline - A line to validate (\n has been stripped for what it's worth).
686: #
687: # Return:
688: # 0 - Invalid scriptline.
689: # 1 - Valid scriptline
690: # NOTE:
691: # Only the command syntax is checked, not the executability of the
692: # command.
693: #
694: sub isValidEditCommand {
695: my $scriptline = shift;
696:
697: # Line elements are pipe separated:
698:
699: my ($command, $key, $newline) = split(/\|/, $scriptline);
700: &logthis('<font color="green"> isValideditCommand checking: '.
701: "Command = '$command', Key = '$key', Newline = '$newline' </font>\n");
702:
703: if ($command eq "delete") {
704: #
705: # key with no newline.
706: #
707: if( ($key eq "") || ($newline ne "")) {
708: return 0; # Must have key but no newline.
709: } else {
710: return 1; # Valid syntax.
711: }
712: } elsif ($command eq "replace") {
713: #
714: # key and newline:
715: #
716: if (($key eq "") || ($newline eq "")) {
717: return 0;
718: } else {
719: return 1;
720: }
721: } elsif ($command eq "append") {
722: if (($key ne "") && ($newline eq "")) {
723: return 1;
724: } else {
725: return 0;
726: }
727: } else {
728: return 0; # Invalid command.
729: }
730: return 0; # Should not get here!!!
731: }
732: #
733: # ApplyEdit - Applies an edit command to a line in a configuration
734: # file. It is the caller's responsiblity to validate the
735: # edit line.
736: # Parameters:
737: # $directive - A single edit directive to apply.
738: # Edit directives are of the form:
739: # append|newline - Appends a new line to the file.
740: # replace|key|newline - Replaces the line with key value 'key'
741: # delete|key - Deletes the line with key value 'key'.
742: # $editor - A config file editor object that contains the
743: # file being edited.
744: #
745: sub ApplyEdit {
746:
747: my ($directive, $editor) = @_;
748:
749: # Break the directive down into its command and its parameters
750: # (at most two at this point. The meaning of the parameters, if in fact
751: # they exist depends on the command).
752:
753: my ($command, $p1, $p2) = split(/\|/, $directive);
754:
755: if($command eq "append") {
756: $editor->Append($p1); # p1 - key p2 null.
757: } elsif ($command eq "replace") {
758: $editor->ReplaceLine($p1, $p2); # p1 - key p2 = newline.
759: } elsif ($command eq "delete") {
760: $editor->DeleteLine($p1); # p1 - key p2 null.
761: } else { # Should not get here!!!
762: die "Invalid command given to ApplyEdit $command"
763: }
764: }
765: #
766: # AdjustOurHost:
767: # Adjusts a host file stored in a configuration file editor object
768: # for the true IP address of this host. This is necessary for hosts
769: # that live behind a firewall.
770: # Those hosts have a publicly distributed IP of the firewall, but
771: # internally must use their actual IP. We assume that a given
772: # host only has a single IP interface for now.
773: # Formal Parameters:
774: # editor - The configuration file editor to adjust. This
775: # editor is assumed to contain a hosts.tab file.
776: # Strategy:
777: # - Figure out our hostname.
778: # - Lookup the entry for this host.
779: # - Modify the line to contain our IP
780: # - Do a replace for this host.
781: sub AdjustOurHost {
782: my $editor = shift;
783:
784: # figure out who I am.
785:
786: my $myHostName = $perlvar{'lonHostID'}; # LonCAPA hostname.
787:
788: # Get my host file entry.
789:
790: my $ConfigLine = $editor->Find($myHostName);
791: if(! (defined $ConfigLine)) {
792: die "AdjustOurHost - no entry for me in hosts file $myHostName";
793: }
794: # figure out my IP:
795: # Use the config line to get my hostname.
796: # Use gethostbyname to translate that into an IP address.
797: #
798: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);
799: my $BinaryIp = gethostbyname($name);
800: my $ip = inet_ntoa($ip);
801: #
802: # Reassemble the config line from the elements in the list.
803: # Note that if the loncnew items were not present before, they will
804: # be now even if they would be empty
805: #
806: my $newConfigLine = $id;
807: foreach my $item ($domain, $role, $name, $ip, $maxcon, $idleto, $mincon) {
808: $newConfigLine .= ":".$item;
809: }
810: # Replace the line:
811:
812: $editor->ReplaceLine($id, $newConfigLine);
813:
814: }
815: #
816: # ReplaceConfigFile:
817: # Replaces a configuration file with the contents of a
818: # configuration file editor object.
819: # This is done by:
820: # - Copying the target file to <filename>.old
821: # - Writing the new file to <filename>.tmp
822: # - Moving <filename.tmp> -> <filename>
823: # This laborious process ensures that the system is never without
824: # a configuration file that's at least valid (even if the contents
825: # may be dated).
826: # Parameters:
827: # filename - Name of the file to modify... this is a full path.
828: # editor - Editor containing the file.
829: #
830: sub ReplaceConfigFile {
831:
832: my ($filename, $editor) = @_;
833:
834: CopyFile ($filename, $filename.".old");
835:
836: my $contents = $editor->Get(); # Get the contents of the file.
837:
838: InstallFile($filename, $contents);
839: }
840: #
841: #
842: # Called to edit a configuration table file
843: # Parameters:
844: # request - The entire command/request sent by lonc or lonManage
845: # Return:
846: # The reply to send to the client.
847: #
848: sub EditFile {
849: my $request = shift;
850:
851: # Split the command into it's pieces: edit:filetype:script
852:
853: my ($request, $filetype, $script) = split(/:/, $request,3); # : in script
854:
855: # Check the pre-coditions for success:
856:
857: if($request != "edit") { # Something is amiss afoot alack.
858: return "error:edit request detected, but request != 'edit'\n";
859: }
860: if( ($filetype ne "hosts") &&
861: ($filetype ne "domain")) {
862: return "error:edit requested with invalid file specifier: $filetype \n";
863: }
864:
865: # Split the edit script and check it's validity.
866:
867: my @scriptlines = split(/\n/, $script); # one line per element.
868: my $linecount = scalar(@scriptlines);
869: for(my $i = 0; $i < $linecount; $i++) {
870: chomp($scriptlines[$i]);
871: if(!isValidEditCommand($scriptlines[$i])) {
872: return "error:edit with bad script line: '$scriptlines[$i]' \n";
873: }
874: }
875:
876: # Execute the edit operation.
877: # - Create a config file editor for the appropriate file and
878: # - execute each command in the script:
879: #
880: my $configfile = ConfigFileFromSelector($filetype);
881: if (!(defined $configfile)) {
882: return "refused\n";
883: }
884: my $editor = ConfigFileEdit->new($configfile);
885:
886: for (my $i = 0; $i < $linecount; $i++) {
887: ApplyEdit($scriptlines[$i], $editor);
888: }
889: # If the file is the host file, ensure that our host is
890: # adjusted to have our ip:
891: #
892: if($filetype eq "host") {
893: AdjustOurHost($editor);
894: }
895: # Finally replace the current file with our file.
896: #
897: ReplaceConfigFile($configfile, $editor);
898:
899: return "ok\n";
900: }
901: #
902: # Convert an error return code from lcpasswd to a string value.
903: #
904: sub lcpasswdstrerror {
905: my $ErrorCode = shift;
906: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
907: return "lcpasswd Unrecognized error return value ".$ErrorCode;
908: } else {
909: return $passwderrors[$ErrorCode];
910: }
911: }
912:
913: #
914: # Convert an error return code from lcuseradd to a string value:
915: #
916: sub lcuseraddstrerror {
917: my $ErrorCode = shift;
918: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
919: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
920: } else {
921: return $adderrors[$ErrorCode];
922: }
923: }
924:
925: # grabs exception and records it to log before exiting
926: sub catchexception {
927: my ($error)=@_;
928: $SIG{'QUIT'}='DEFAULT';
929: $SIG{__DIE__}='DEFAULT';
930: &status("Catching exception");
931: &logthis("<font color='red'>CRITICAL: "
932: ."ABNORMAL EXIT. Child $$ for server $thisserver died through "
933: ."a crash with this error msg->[$error]</font>");
934: &logthis('Famous last words: '.$status.' - '.$lastlog);
935: if ($client) { print $client "error: $error\n"; }
936: $server->close();
937: die($error);
938: }
939:
940: sub timeout {
941: &status("Handling Timeout");
942: &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
943: &catchexception('Timeout');
944: }
945: # -------------------------------- Set signal handlers to record abnormal exits
946:
947: $SIG{'QUIT'}=\&catchexception;
948: $SIG{__DIE__}=\&catchexception;
949:
950: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
951: &status("Read loncapa.conf and loncapa_apache.conf");
952: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
953: %perlvar=%{$perlvarref};
954: undef $perlvarref;
955:
956: # ----------------------------- Make sure this process is running from user=www
957: my $wwwid=getpwnam('www');
958: if ($wwwid!=$<) {
959: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
960: my $subj="LON: $currenthostid User ID mismatch";
961: system("echo 'User ID mismatch. lond must be run as user www.' |\
962: mailto $emailto -s '$subj' > /dev/null");
963: exit 1;
964: }
965:
966: # --------------------------------------------- Check if other instance running
967:
968: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
969:
970: if (-e $pidfile) {
971: my $lfh=IO::File->new("$pidfile");
972: my $pide=<$lfh>;
973: chomp($pide);
974: if (kill 0 => $pide) { die "already running"; }
975: }
976:
977: # ------------------------------------------------------------- Read hosts file
978:
979:
980:
981: # establish SERVER socket, bind and listen.
982: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
983: Type => SOCK_STREAM,
984: Proto => 'tcp',
985: Reuse => 1,
986: Listen => 10 )
987: or die "making socket: $@\n";
988:
989: # --------------------------------------------------------- Do global variables
990:
991: # global variables
992:
993: my %children = (); # keys are current child process IDs
994:
995: sub REAPER { # takes care of dead children
996: $SIG{CHLD} = \&REAPER;
997: &status("Handling child death");
998: my $pid;
999: do {
1000: $pid = waitpid(-1,&WNOHANG());
1001: if (defined($children{$pid})) {
1002: &logthis("Child $pid died");
1003: delete($children{$pid});
1004: } elsif ($pid > 0) {
1005: &logthis("Unknown Child $pid died");
1006: }
1007: } while ( $pid > 0 );
1008: foreach my $child (keys(%children)) {
1009: $pid = waitpid($child,&WNOHANG());
1010: if ($pid > 0) {
1011: &logthis("Child $child - $pid looks like we missed it's death");
1012: delete($children{$pid});
1013: }
1014: }
1015: &status("Finished Handling child death");
1016: }
1017:
1018: sub HUNTSMAN { # signal handler for SIGINT
1019: &status("Killing children (INT)");
1020: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
1021: kill 'INT' => keys %children;
1022: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1023: my $execdir=$perlvar{'lonDaemons'};
1024: unlink("$execdir/logs/lond.pid");
1025: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
1026: &status("Done killing children");
1027: exit; # clean up with dignity
1028: }
1029:
1030: sub HUPSMAN { # signal handler for SIGHUP
1031: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
1032: &status("Killing children for restart (HUP)");
1033: kill 'INT' => keys %children;
1034: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1035: &logthis("<font color='red'>CRITICAL: Restarting</font>");
1036: my $execdir=$perlvar{'lonDaemons'};
1037: unlink("$execdir/logs/lond.pid");
1038: &status("Restarting self (HUP)");
1039: exec("$execdir/lond"); # here we go again
1040: }
1041:
1042: #
1043: # Kill off hashes that describe the host table prior to re-reading it.
1044: # Hashes affected are:
1045: # %hostid, %hostdom %hostip %hostdns.
1046: #
1047: sub KillHostHashes {
1048: foreach my $key (keys %hostid) {
1049: delete $hostid{$key};
1050: }
1051: foreach my $key (keys %hostdom) {
1052: delete $hostdom{$key};
1053: }
1054: foreach my $key (keys %hostip) {
1055: delete $hostip{$key};
1056: }
1057: foreach my $key (keys %hostdns) {
1058: delete $hostdns{$key};
1059: }
1060: }
1061: #
1062: # Read in the host table from file and distribute it into the various hashes:
1063: #
1064: # - %hostid - Indexed by IP, the loncapa hostname.
1065: # - %hostdom - Indexed by loncapa hostname, the domain.
1066: # - %hostip - Indexed by hostid, the Ip address of the host.
1067: sub ReadHostTable {
1068:
1069: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
1070: my $myloncapaname = $perlvar{'lonHostID'};
1071: Debug("My loncapa name is : $myloncapaname");
1072: while (my $configline=<CONFIG>) {
1073: if (!($configline =~ /^\s*\#/)) {
1074: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
1075: chomp($ip); $ip=~s/\D+$//;
1076: $hostid{$ip}=$id; # LonCAPA name of host by IP.
1077: $hostdom{$id}=$domain; # LonCAPA domain name of host.
1078: $hostip{$id}=$ip; # IP address of host.
1079: $hostdns{$name} = $id; # LonCAPA name of host by DNS.
1080:
1081: if ($id eq $perlvar{'lonHostID'}) {
1082: Debug("Found me in the host table: $name");
1083: $thisserver=$name;
1084: }
1085: }
1086: }
1087: close(CONFIG);
1088: }
1089: #
1090: # Reload the Apache daemon's state.
1091: # This is done by invoking /home/httpd/perl/apachereload
1092: # a setuid perl script that can be root for us to do this job.
1093: #
1094: sub ReloadApache {
1095: my $execdir = $perlvar{'lonDaemons'};
1096: my $script = $execdir."/apachereload";
1097: system($script);
1098: }
1099:
1100: #
1101: # Called in response to a USR2 signal.
1102: # - Reread hosts.tab
1103: # - All children connected to hosts that were removed from hosts.tab
1104: # are killed via SIGINT
1105: # - All children connected to previously existing hosts are sent SIGUSR1
1106: # - Our internal hosts hash is updated to reflect the new contents of
1107: # hosts.tab causing connections from hosts added to hosts.tab to
1108: # now be honored.
1109: #
1110: sub UpdateHosts {
1111: &status("Reload hosts.tab");
1112: logthis('<font color="blue"> Updating connections </font>');
1113: #
1114: # The %children hash has the set of IP's we currently have children
1115: # on. These need to be matched against records in the hosts.tab
1116: # Any ip's no longer in the table get killed off they correspond to
1117: # either dropped or changed hosts. Note that the re-read of the table
1118: # will take care of new and changed hosts as connections come into being.
1119:
1120:
1121: KillHostHashes;
1122: ReadHostTable;
1123:
1124: foreach my $child (keys %children) {
1125: my $childip = $children{$child};
1126: if(!$hostid{$childip}) {
1127: logthis('<font color="blue"> UpdateHosts killing child '
1128: ." $child for ip $childip </font>");
1129: kill('INT', $child);
1130: } else {
1131: logthis('<font color="green"> keeping child for ip '
1132: ." $childip (pid=$child) </font>");
1133: }
1134: }
1135: ReloadApache;
1136: &status("Finished reloading hosts.tab");
1137: }
1138:
1139:
1140: sub checkchildren {
1141: &status("Checking on the children (sending signals)");
1142: &initnewstatus();
1143: &logstatus();
1144: &logthis('Going to check on the children');
1145: my $docdir=$perlvar{'lonDocRoot'};
1146: foreach (sort keys %children) {
1147: sleep 1;
1148: unless (kill 'USR1' => $_) {
1149: &logthis ('Child '.$_.' is dead');
1150: &logstatus($$.' is dead');
1151: }
1152: }
1153: sleep 5;
1154: $SIG{ALRM} = sub { die "timeout" };
1155: $SIG{__DIE__} = 'DEFAULT';
1156: &status("Checking on the children (waiting for reports)");
1157: foreach (sort keys %children) {
1158: unless (-e "$docdir/lon-status/londchld/$_.txt") {
1159: eval {
1160: alarm(300);
1161: &logthis('Child '.$_.' did not respond');
1162: kill 9 => $_;
1163: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
1164: #$subj="LON: $currenthostid killed lond process $_";
1165: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
1166: #$execdir=$perlvar{'lonDaemons'};
1167: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
1168: alarm(0);
1169: }
1170: }
1171: }
1172: $SIG{ALRM} = 'DEFAULT';
1173: $SIG{__DIE__} = \&catchexception;
1174: &status("Finished checking children");
1175: }
1176:
1177: # --------------------------------------------------------------------- Logging
1178:
1179: sub logthis {
1180: my $message=shift;
1181: my $execdir=$perlvar{'lonDaemons'};
1182: my $fh=IO::File->new(">>$execdir/logs/lond.log");
1183: my $now=time;
1184: my $local=localtime($now);
1185: $lastlog=$local.': '.$message;
1186: print $fh "$local ($$): $message\n";
1187: }
1188:
1189: # ------------------------- Conditional log if $DEBUG true.
1190: sub Debug {
1191: my $message = shift;
1192: if($DEBUG) {
1193: &logthis($message);
1194: }
1195: }
1196:
1197: #
1198: # Sub to do replies to client.. this gives a hook for some
1199: # debug tracing too:
1200: # Parameters:
1201: # fd - File open on client.
1202: # reply - Text to send to client.
1203: # request - Original request from client.
1204: #
1205: sub Reply {
1206:
1207: my ($fd, $reply, $request) = @_;
1208:
1209: print $fd $reply;
1210: Debug("Request was $request Reply was $reply");
1211:
1212: }
1213: # ------------------------------------------------------------------ Log status
1214:
1215: sub logstatus {
1216: &status("Doing logging");
1217: my $docdir=$perlvar{'lonDocRoot'};
1218: {
1219: my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");
1220: print $fh $$."\t".$clientname."\t".$currenthostid."\t"
1221: .$status."\t".$lastlog."\n";
1222: $fh->close();
1223: }
1224: &status("Finished londstatus.txt");
1225: {
1226: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
1227: print $fh $status."\n".$lastlog."\n".time;
1228: $fh->close();
1229: }
1230: &status("Finished logging");
1231: }
1232:
1233: sub initnewstatus {
1234: my $docdir=$perlvar{'lonDocRoot'};
1235: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
1236: my $now=time;
1237: my $local=localtime($now);
1238: print $fh "LOND status $local - parent $$\n\n";
1239: opendir(DIR,"$docdir/lon-status/londchld");
1240: while (my $filename=readdir(DIR)) {
1241: unlink("$docdir/lon-status/londchld/$filename");
1242: }
1243: closedir(DIR);
1244: }
1245:
1246: # -------------------------------------------------------------- Status setting
1247:
1248: sub status {
1249: my $what=shift;
1250: my $now=time;
1251: my $local=localtime($now);
1252: $status=$local.': '.$what;
1253: $0='lond: '.$what.' '.$local;
1254: }
1255:
1256: # -------------------------------------------------------- Escape Special Chars
1257:
1258: sub escape {
1259: my $str=shift;
1260: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
1261: return $str;
1262: }
1263:
1264: # ----------------------------------------------------- Un-Escape Special Chars
1265:
1266: sub unescape {
1267: my $str=shift;
1268: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
1269: return $str;
1270: }
1271:
1272: # ----------------------------------------------------------- Send USR1 to lonc
1273:
1274: sub reconlonc {
1275: my $peerfile=shift;
1276: &logthis("Trying to reconnect for $peerfile");
1277: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
1278: if (my $fh=IO::File->new("$loncfile")) {
1279: my $loncpid=<$fh>;
1280: chomp($loncpid);
1281: if (kill 0 => $loncpid) {
1282: &logthis("lonc at pid $loncpid responding, sending USR1");
1283: kill USR1 => $loncpid;
1284: } else {
1285: &logthis(
1286: "<font color='red'>CRITICAL: "
1287: ."lonc at pid $loncpid not responding, giving up</font>");
1288: }
1289: } else {
1290: &logthis('<font color="red">CRITICAL: lonc not running, giving up</font>');
1291: }
1292: }
1293:
1294: # -------------------------------------------------- Non-critical communication
1295:
1296: sub subreply {
1297: my ($cmd,$server)=@_;
1298: my $peerfile="$perlvar{'lonSockDir'}/$server";
1299: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
1300: Type => SOCK_STREAM,
1301: Timeout => 10)
1302: or return "con_lost";
1303: print $sclient "$cmd\n";
1304: my $answer=<$sclient>;
1305: chomp($answer);
1306: if (!$answer) { $answer="con_lost"; }
1307: return $answer;
1308: }
1309:
1310: sub reply {
1311: my ($cmd,$server)=@_;
1312: my $answer;
1313: if ($server ne $currenthostid) {
1314: $answer=subreply($cmd,$server);
1315: if ($answer eq 'con_lost') {
1316: $answer=subreply("ping",$server);
1317: if ($answer ne $server) {
1318: &logthis("sub reply: answer != server answer is $answer, server is $server");
1319: &reconlonc("$perlvar{'lonSockDir'}/$server");
1320: }
1321: $answer=subreply($cmd,$server);
1322: }
1323: } else {
1324: $answer='self_reply';
1325: }
1326: return $answer;
1327: }
1328:
1329: # -------------------------------------------------------------- Talk to lonsql
1330:
1331: sub sqlreply {
1332: my ($cmd)=@_;
1333: my $answer=subsqlreply($cmd);
1334: if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }
1335: return $answer;
1336: }
1337:
1338: sub subsqlreply {
1339: my ($cmd)=@_;
1340: my $unixsock="mysqlsock";
1341: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
1342: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
1343: Type => SOCK_STREAM,
1344: Timeout => 10)
1345: or return "con_lost";
1346: print $sclient "$cmd\n";
1347: my $answer=<$sclient>;
1348: chomp($answer);
1349: if (!$answer) { $answer="con_lost"; }
1350: return $answer;
1351: }
1352:
1353: # -------------------------------------------- Return path to profile directory
1354:
1355: sub propath {
1356: my ($udom,$uname)=@_;
1357: $udom=~s/\W//g;
1358: $uname=~s/\W//g;
1359: my $subdir=$uname.'__';
1360: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
1361: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
1362: return $proname;
1363: }
1364:
1365: # --------------------------------------- Is this the home server of an author?
1366:
1367: sub ishome {
1368: my $author=shift;
1369: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1370: my ($udom,$uname)=split(/\//,$author);
1371: my $proname=propath($udom,$uname);
1372: if (-e $proname) {
1373: return 'owner';
1374: } else {
1375: return 'not_owner';
1376: }
1377: }
1378:
1379: # ======================================================= Continue main program
1380: # ---------------------------------------------------- Fork once and dissociate
1381:
1382: my $fpid=fork;
1383: exit if $fpid;
1384: die "Couldn't fork: $!" unless defined ($fpid);
1385:
1386: POSIX::setsid() or die "Can't start new session: $!";
1387:
1388: # ------------------------------------------------------- Write our PID on disk
1389:
1390: my $execdir=$perlvar{'lonDaemons'};
1391: open (PIDSAVE,">$execdir/logs/lond.pid");
1392: print PIDSAVE "$$\n";
1393: close(PIDSAVE);
1394: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
1395: &status('Starting');
1396:
1397:
1398:
1399: # ----------------------------------------------------- Install signal handlers
1400:
1401:
1402: $SIG{CHLD} = \&REAPER;
1403: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
1404: $SIG{HUP} = \&HUPSMAN;
1405: $SIG{USR1} = \&checkchildren;
1406: $SIG{USR2} = \&UpdateHosts;
1407:
1408: # Read the host hashes:
1409:
1410: ReadHostTable;
1411:
1412: # --------------------------------------------------------------
1413: # Accept connections. When a connection comes in, it is validated
1414: # and if good, a child process is created to process transactions
1415: # along the connection.
1416:
1417: while (1) {
1418: &status('Starting accept');
1419: $client = $server->accept() or next;
1420: &status('Accepted '.$client.' off to spawn');
1421: make_new_child($client);
1422: &status('Finished spawning');
1423: }
1424:
1425: sub make_new_child {
1426: my $pid;
1427: my $cipher;
1428: my $sigset;
1429:
1430: $client = shift;
1431: &status('Starting new child '.$client);
1432: &logthis('<font color="green"> Attempting to start child ('.$client.
1433: ")</font>");
1434: # block signal for fork
1435: $sigset = POSIX::SigSet->new(SIGINT);
1436: sigprocmask(SIG_BLOCK, $sigset)
1437: or die "Can't block SIGINT for fork: $!\n";
1438:
1439: die "fork: $!" unless defined ($pid = fork);
1440:
1441: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
1442: # connection liveness.
1443:
1444: #
1445: # Figure out who we're talking to so we can record the peer in
1446: # the pid hash.
1447: #
1448: my $caller = getpeername($client);
1449: my ($port,$iaddr);
1450: if (defined($caller) && length($caller) > 0) {
1451: ($port,$iaddr)=unpack_sockaddr_in($caller);
1452: } else {
1453: &logthis("Unable to determine who caller was, getpeername returned nothing");
1454: }
1455: if (defined($iaddr)) {
1456: $clientip = inet_ntoa($iaddr);
1457: Debug("Connected with $clientip");
1458: $clientdns = gethostbyaddr($iaddr, AF_INET);
1459: Debug("Connected with $clientdns by name");
1460: } else {
1461: &logthis("Unable to determine clientip");
1462: $clientip='Unavailable';
1463: }
1464:
1465: if ($pid) {
1466: # Parent records the child's birth and returns.
1467: sigprocmask(SIG_UNBLOCK, $sigset)
1468: or die "Can't unblock SIGINT for fork: $!\n";
1469: $children{$pid} = $clientip;
1470: &status('Started child '.$pid);
1471: return;
1472: } else {
1473: # Child can *not* return from this subroutine.
1474: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
1475: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
1476: #don't get intercepted
1477: $SIG{USR1}= \&logstatus;
1478: $SIG{ALRM}= \&timeout;
1479: $lastlog='Forked ';
1480: $status='Forked';
1481:
1482: # unblock signals
1483: sigprocmask(SIG_UNBLOCK, $sigset)
1484: or die "Can't unblock SIGINT for fork: $!\n";
1485:
1486: my $tmpsnum=0;
1487: #---------------------------------------------------- kerberos 5 initialization
1488: &Authen::Krb5::init_context();
1489: &Authen::Krb5::init_ets();
1490:
1491: &status('Accepted connection');
1492: # =============================================================================
1493: # do something with the connection
1494: # -----------------------------------------------------------------------------
1495: # see if we know client and 'check' for spoof IP by ineffective challenge
1496:
1497: ReadManagerTable; # May also be a manager!!
1498:
1499: my $clientrec=($hostid{$clientip} ne undef);
1500: my $ismanager=($managers{$clientip} ne undef);
1501: $clientname = "[unknonwn]";
1502: if($clientrec) { # Establish client type.
1503: $ConnectionType = "client";
1504: $clientname = $hostid{$clientip};
1505: if($ismanager) {
1506: $ConnectionType = "both";
1507: }
1508: } else {
1509: $ConnectionType = "manager";
1510: $clientname = $managers{$clientip};
1511: }
1512: my $clientok;
1513:
1514: if ($clientrec || $ismanager) {
1515: &status("Waiting for init from $clientip $clientname");
1516: &logthis('<font color="yellow">INFO: Connection, '.
1517: $clientip.
1518: " ($clientname) connection type = $ConnectionType </font>" );
1519: &status("Connecting $clientip ($clientname))");
1520: my $remotereq=<$client>;
1521: chomp($remotereq);
1522: Debug("Got init: $remotereq");
1523: my $inikeyword = split(/:/, $remotereq);
1524: if ($remotereq =~ /^init/) {
1525: &sethost("sethost:$perlvar{'lonHostID'}");
1526: #
1527: # If the remote is attempting a local init... give that a try:
1528: #
1529: my ($i, $inittype) = split(/:/, $remotereq);
1530:
1531: # If the connection type is ssl, but I didn't get my
1532: # certificate files yet, then I'll drop back to
1533: # insecure (if allowed).
1534:
1535: if($inittype eq "ssl") {
1536: my ($ca, $cert) = lonssl::CertificateFile;
1537: my $kfile = lonssl::KeyFile;
1538: if((!$ca) ||
1539: (!$cert) ||
1540: (!$kfile)) {
1541: $inittype = ""; # This forces insecure attempt.
1542: &logthis("<font color=\"blue\"> Certificates not "
1543: ."installed -- trying insecure auth</font>");
1544: }
1545: else { # SSL certificates are in place so
1546: } # Leave the inittype alone.
1547: }
1548:
1549: if($inittype eq "local") {
1550: my $key = LocalConnection($client, $remotereq);
1551: if($key) {
1552: Debug("Got local key $key");
1553: $clientok = 1;
1554: my $cipherkey = pack("H32", $key);
1555: $cipher = new IDEA($cipherkey);
1556: print $client "ok:local\n";
1557: &logthis('<font color="green"'
1558: . "Successful local authentication </font>");
1559: } else {
1560: Debug("Failed to get local key");
1561: $clientok = 0;
1562: shutdown($client, 3);
1563: close $client;
1564: }
1565: } elsif ($inittype eq "ssl") {
1566: my $key = SSLConnection($client);
1567: if ($key) {
1568: $clientok = 1;
1569: my $cipherkey = pack("H32", $key);
1570: $cipher = new IDEA($cipherkey);
1571: &logthis('<font color="green">'
1572: ."Successfull ssl authentication with $clientname </font>");
1573:
1574: } else {
1575: $clientok = 0;
1576: close $client;
1577: }
1578:
1579: } else {
1580: my $ok = InsecureConnection($client);
1581: if($ok) {
1582: $clientok = 1;
1583: &logthis('<font color="green">'
1584: ."Successful insecure authentication with $clientname </font>");
1585: print $client "ok\n";
1586: } else {
1587: &logthis('<font color="yellow">'
1588: ."Attempted insecure connection disallowed </font>");
1589: close $client;
1590: $clientok = 0;
1591:
1592: }
1593: }
1594: } else {
1595: &logthis(
1596: "<font color='blue'>WARNING: "
1597: ."$clientip failed to initialize: >$remotereq< </font>");
1598: &status('No init '.$clientip);
1599: }
1600:
1601: } else {
1602: &logthis(
1603: "<font color='blue'>WARNING: Unknown client $clientip</font>");
1604: &status('Hung up on '.$clientip);
1605: }
1606:
1607: if ($clientok) {
1608: # ---------------- New known client connecting, could mean machine online again
1609:
1610: foreach my $id (keys(%hostip)) {
1611: if ($hostip{$id} ne $clientip ||
1612: $hostip{$currenthostid} eq $clientip) {
1613: # no need to try to do recon's to myself
1614: next;
1615: }
1616: &reconlonc("$perlvar{'lonSockDir'}/$id");
1617: }
1618: &logthis("<font color='green'>Established connection: $clientname</font>");
1619: &status('Will listen to '.$clientname);
1620: # ------------------------------------------------------------ Process requests
1621: while (my $userinput=<$client>) {
1622: chomp($userinput);
1623: Debug("Request = $userinput\n");
1624: &status('Processing '.$clientname.': '.$userinput);
1625: my $wasenc=0;
1626: alarm(120);
1627: # ------------------------------------------------------------ See if encrypted
1628: if ($userinput =~ /^enc/) {
1629: if ($cipher) {
1630: my ($cmd,$cmdlength,$encinput)=split(/:/,$userinput);
1631: $userinput='';
1632: for (my $encidx=0;$encidx<length($encinput);$encidx+=16) {
1633: $userinput.=
1634: $cipher->decrypt(
1635: pack("H16",substr($encinput,$encidx,16))
1636: );
1637: }
1638: $userinput=substr($userinput,0,$cmdlength);
1639: $wasenc=1;
1640: }
1641: }
1642:
1643: # ------------------------------------------------------------- Normal commands
1644: # ------------------------------------------------------------------------ ping
1645: if ($userinput =~ /^ping/) { # client only
1646: if(isClient) {
1647: print $client "$currenthostid\n";
1648: } else {
1649: Reply($client, "refused\n", $userinput);
1650: }
1651: # ------------------------------------------------------------------------ pong
1652: }elsif ($userinput =~ /^pong/) { # client only
1653: if(isClient) {
1654: my $reply=&reply("ping",$clientname);
1655: print $client "$currenthostid:$reply\n";
1656: } else {
1657: Reply($client, "refused\n", $userinput);
1658: }
1659: # ------------------------------------------------------------------------ ekey
1660: } elsif ($userinput =~ /^ekey/) { # ok for both clients & mgrs
1661: my $buildkey=time.$$.int(rand 100000);
1662: $buildkey=~tr/1-6/A-F/;
1663: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
1664: my $key=$currenthostid.$clientname;
1665: $key=~tr/a-z/A-Z/;
1666: $key=~tr/G-P/0-9/;
1667: $key=~tr/Q-Z/0-9/;
1668: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
1669: $key=substr($key,0,32);
1670: my $cipherkey=pack("H32",$key);
1671: $cipher=new IDEA $cipherkey;
1672: print $client "$buildkey\n";
1673: # ------------------------------------------------------------------------ load
1674: } elsif ($userinput =~ /^load/) { # client only
1675: if (isClient) {
1676: my $loadavg;
1677: {
1678: my $loadfile=IO::File->new('/proc/loadavg');
1679: $loadavg=<$loadfile>;
1680: }
1681: $loadavg =~ s/\s.*//g;
1682: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1683: print $client "$loadpercent\n";
1684: } else {
1685: Reply($client, "refused\n", $userinput);
1686:
1687: }
1688: # -------------------------------------------------------------------- userload
1689: } elsif ($userinput =~ /^userload/) { # client only
1690: if(isClient) {
1691: my $userloadpercent=&userload();
1692: print $client "$userloadpercent\n";
1693: } else {
1694: Reply($client, "refused\n", $userinput);
1695:
1696: }
1697: #
1698: # Transactions requiring encryption:
1699: #
1700: # ----------------------------------------------------------------- currentauth
1701: } elsif ($userinput =~ /^currentauth/) {
1702: if (($wasenc==1) && isClient) { # Encoded & client only.
1703: my ($cmd,$udom,$uname)=split(/:/,$userinput);
1704: my $result = GetAuthType($udom, $uname);
1705: if($result eq "nouser") {
1706: print $client "unknown_user\n";
1707: }
1708: else {
1709: print $client "$result\n"
1710: }
1711: } else {
1712: Reply($client, "refused\n", $userinput);
1713:
1714: }
1715: #--------------------------------------------------------------------- pushfile
1716: } elsif($userinput =~ /^pushfile/) { # encoded & manager.
1717: if(($wasenc == 1) && isManager) {
1718: my $cert = GetCertificate($userinput);
1719: if(ValidManager($cert)) {
1720: my $reply = PushFile($userinput);
1721: print $client "$reply\n";
1722: } else {
1723: print $client "refused\n";
1724: }
1725: } else {
1726: Reply($client, "refused\n", $userinput);
1727:
1728: }
1729: #--------------------------------------------------------------------- reinit
1730: } elsif($userinput =~ /^reinit/) { # Encoded and manager
1731: if (($wasenc == 1) && isManager) {
1732: my $cert = GetCertificate($userinput);
1733: if(ValidManager($cert)) {
1734: chomp($userinput);
1735: my $reply = ReinitProcess($userinput);
1736: print $client "$reply\n";
1737: } else {
1738: print $client "refused\n";
1739: }
1740: } else {
1741: Reply($client, "refused\n", $userinput);
1742: }
1743: #------------------------------------------------------------------------- edit
1744: } elsif ($userinput =~ /^edit/) { # encoded and manager:
1745: if(($wasenc ==1) && (isManager)) {
1746: my $cert = GetCertificate($userinput);
1747: if(ValidManager($cert)) {
1748: my($command, $filetype, $script) = split(/:/, $userinput);
1749: if (($filetype eq "hosts") || ($filetype eq "domain")) {
1750: if($script ne "") {
1751: Reply($client, EditFile($userinput));
1752: } else {
1753: Reply($client,"refused\n",$userinput);
1754: }
1755: } else {
1756: Reply($client,"refused\n",$userinput);
1757: }
1758: } else {
1759: Reply($client,"refused\n",$userinput);
1760: }
1761: } else {
1762: Reply($client,"refused\n",$userinput);
1763: }
1764: # ------------------------------------------------------------------------ auth
1765: } elsif ($userinput =~ /^auth/) { # Encoded and client only.
1766: if (($wasenc==1) && isClient) {
1767: my ($cmd,$udom,$uname,$upass)=split(/:/,$userinput);
1768: chomp($upass);
1769: $upass=unescape($upass);
1770: my $proname=propath($udom,$uname);
1771: my $passfilename="$proname/passwd";
1772: if (-e $passfilename) {
1773: my $pf = IO::File->new($passfilename);
1774: my $realpasswd=<$pf>;
1775: chomp($realpasswd);
1776: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1777: my $pwdcorrect=0;
1778: if ($howpwd eq 'internal') {
1779: &Debug("Internal auth");
1780: $pwdcorrect=
1781: (crypt($upass,$contentpwd) eq $contentpwd);
1782: } elsif ($howpwd eq 'unix') {
1783: &Debug("Unix auth");
1784: if((getpwnam($uname))[1] eq "") { #no such user!
1785: $pwdcorrect = 0;
1786: } else {
1787: $contentpwd=(getpwnam($uname))[1];
1788: my $pwauth_path="/usr/local/sbin/pwauth";
1789: unless ($contentpwd eq 'x') {
1790: $pwdcorrect=
1791: (crypt($upass,$contentpwd) eq
1792: $contentpwd);
1793: }
1794:
1795: elsif (-e $pwauth_path) {
1796: open PWAUTH, "|$pwauth_path" or
1797: die "Cannot invoke authentication";
1798: print PWAUTH "$uname\n$upass\n";
1799: close PWAUTH;
1800: $pwdcorrect=!$?;
1801: }
1802: }
1803: } elsif ($howpwd eq 'krb4') {
1804: my $null=pack("C",0);
1805: unless ($upass=~/$null/) {
1806: my $krb4_error = &Authen::Krb4::get_pw_in_tkt
1807: ($uname,"",$contentpwd,'krbtgt',
1808: $contentpwd,1,$upass);
1809: if (!$krb4_error) {
1810: $pwdcorrect = 1;
1811: } else {
1812: $pwdcorrect=0;
1813: # log error if it is not a bad password
1814: if ($krb4_error != 62) {
1815: &logthis('krb4:'.$uname.','.
1816: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
1817: }
1818: }
1819: }
1820: } elsif ($howpwd eq 'krb5') {
1821: my $null=pack("C",0);
1822: unless ($upass=~/$null/) {
1823: my $krbclient=&Authen::Krb5::parse_name($uname.'@'.$contentpwd);
1824: my $krbservice="krbtgt/".$contentpwd."\@".$contentpwd;
1825: my $krbserver=&Authen::Krb5::parse_name($krbservice);
1826: my $credentials=&Authen::Krb5::cc_default();
1827: $credentials->initialize($krbclient);
1828: my $krbreturn =
1829: &Authen::Krb5::get_in_tkt_with_password(
1830: $krbclient,$krbserver,$upass,$credentials);
1831: # unless ($krbreturn) {
1832: # &logthis("Krb5 Error: ".
1833: # &Authen::Krb5::error());
1834: # }
1835: $pwdcorrect = ($krbreturn == 1);
1836: } else { $pwdcorrect=0; }
1837: } elsif ($howpwd eq 'localauth') {
1838: $pwdcorrect=&localauth::localauth($uname,$upass,
1839: $contentpwd);
1840: }
1841: if ($pwdcorrect) {
1842: print $client "authorized\n";
1843: } else {
1844: print $client "non_authorized\n";
1845: }
1846: } else {
1847: print $client "unknown_user\n";
1848: }
1849: } else {
1850: Reply($client, "refused\n", $userinput);
1851:
1852: }
1853: # ---------------------------------------------------------------------- passwd
1854: } elsif ($userinput =~ /^passwd/) { # encoded and client
1855: if (($wasenc==1) && isClient) {
1856: my
1857: ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
1858: chomp($npass);
1859: $upass=&unescape($upass);
1860: $npass=&unescape($npass);
1861: &Debug("Trying to change password for $uname");
1862: my $proname=propath($udom,$uname);
1863: my $passfilename="$proname/passwd";
1864: if (-e $passfilename) {
1865: my $realpasswd;
1866: { my $pf = IO::File->new($passfilename);
1867: $realpasswd=<$pf>; }
1868: chomp($realpasswd);
1869: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1870: if ($howpwd eq 'internal') {
1871: &Debug("internal auth");
1872: if (crypt($upass,$contentpwd) eq $contentpwd) {
1873: my $salt=time;
1874: $salt=substr($salt,6,2);
1875: my $ncpass=crypt($npass,$salt);
1876: {
1877: my $pf;
1878: if ($pf = IO::File->new(">$passfilename")) {
1879: print $pf "internal:$ncpass\n";
1880: &logthis("Result of password change for $uname: pwchange_success");
1881: print $client "ok\n";
1882: } else {
1883: &logthis("Unable to open $uname passwd to change password");
1884: print $client "non_authorized\n";
1885: }
1886: }
1887:
1888: } else {
1889: print $client "non_authorized\n";
1890: }
1891: } elsif ($howpwd eq 'unix') {
1892: # Unix means we have to access /etc/password
1893: # one way or another.
1894: # First: Make sure the current password is
1895: # correct
1896: &Debug("auth is unix");
1897: $contentpwd=(getpwnam($uname))[1];
1898: my $pwdcorrect = "0";
1899: my $pwauth_path="/usr/local/sbin/pwauth";
1900: unless ($contentpwd eq 'x') {
1901: $pwdcorrect=
1902: (crypt($upass,$contentpwd) eq $contentpwd);
1903: } elsif (-e $pwauth_path) {
1904: open PWAUTH, "|$pwauth_path" or
1905: die "Cannot invoke authentication";
1906: print PWAUTH "$uname\n$upass\n";
1907: close PWAUTH;
1908: &Debug("exited pwauth with $? ($uname,$upass) ");
1909: $pwdcorrect=($? == 0);
1910: }
1911: if ($pwdcorrect) {
1912: my $execdir=$perlvar{'lonDaemons'};
1913: &Debug("Opening lcpasswd pipeline");
1914: my $pf = IO::File->new("|$execdir/lcpasswd > $perlvar{'lonDaemons'}/logs/lcpasswd.log");
1915: print $pf "$uname\n$npass\n$npass\n";
1916: close $pf;
1917: my $err = $?;
1918: my $result = ($err>0 ? 'pwchange_failure'
1919: : 'ok');
1920: &logthis("Result of password change for $uname: ".
1921: &lcpasswdstrerror($?));
1922: print $client "$result\n";
1923: } else {
1924: print $client "non_authorized\n";
1925: }
1926: } else {
1927: print $client "auth_mode_error\n";
1928: }
1929: } else {
1930: print $client "unknown_user\n";
1931: }
1932: } else {
1933: Reply($client, "refused\n", $userinput);
1934:
1935: }
1936: # -------------------------------------------------------------------- makeuser
1937: } elsif ($userinput =~ /^makeuser/) { # encoded and client.
1938: &Debug("Make user received");
1939: my $oldumask=umask(0077);
1940: if (($wasenc==1) && isClient) {
1941: my
1942: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
1943: &Debug("cmd =".$cmd." $udom =".$udom.
1944: " uname=".$uname);
1945: chomp($npass);
1946: $npass=&unescape($npass);
1947: my $proname=propath($udom,$uname);
1948: my $passfilename="$proname/passwd";
1949: &Debug("Password file created will be:".
1950: $passfilename);
1951: if (-e $passfilename) {
1952: print $client "already_exists\n";
1953: } elsif ($udom ne $currentdomainid) {
1954: print $client "not_right_domain\n";
1955: } else {
1956: my @fpparts=split(/\//,$proname);
1957: my $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
1958: my $fperror='';
1959: for (my $i=3;$i<=$#fpparts;$i++) {
1960: $fpnow.='/'.$fpparts[$i];
1961: unless (-e $fpnow) {
1962: unless (mkdir($fpnow,0777)) {
1963: $fperror="error: ".($!+0)
1964: ." mkdir failed while attempting "
1965: ."makeuser";
1966: }
1967: }
1968: }
1969: unless ($fperror) {
1970: my $result=&make_passwd_file($uname, $umode,$npass,
1971: $passfilename);
1972: print $client $result;
1973: } else {
1974: print $client "$fperror\n";
1975: }
1976: }
1977: } else {
1978: Reply($client, "refused\n", $userinput);
1979:
1980: }
1981: umask($oldumask);
1982: # -------------------------------------------------------------- changeuserauth
1983: } elsif ($userinput =~ /^changeuserauth/) { # encoded & client
1984: &Debug("Changing authorization");
1985: if (($wasenc==1) && isClient) {
1986: my
1987: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
1988: chomp($npass);
1989: &Debug("cmd = ".$cmd." domain= ".$udom.
1990: "uname =".$uname." umode= ".$umode);
1991: $npass=&unescape($npass);
1992: my $proname=&propath($udom,$uname);
1993: my $passfilename="$proname/passwd";
1994: if ($udom ne $currentdomainid) {
1995: print $client "not_right_domain\n";
1996: } else {
1997: my $result=&make_passwd_file($uname, $umode,$npass,
1998: $passfilename);
1999: print $client $result;
2000: }
2001: } else {
2002: Reply($client, "refused\n", $userinput);
2003:
2004: }
2005: # ------------------------------------------------------------------------ home
2006: } elsif ($userinput =~ /^home/) { # client clear or encoded
2007: if(isClient) {
2008: my ($cmd,$udom,$uname)=split(/:/,$userinput);
2009: chomp($uname);
2010: my $proname=propath($udom,$uname);
2011: if (-e $proname) {
2012: print $client "found\n";
2013: } else {
2014: print $client "not_found\n";
2015: }
2016: } else {
2017: Reply($client, "refused\n", $userinput);
2018:
2019: }
2020: # ---------------------------------------------------------------------- update
2021: } elsif ($userinput =~ /^update/) { # client clear or encoded.
2022: if(isClient) {
2023: my ($cmd,$fname)=split(/:/,$userinput);
2024: my $ownership=ishome($fname);
2025: if ($ownership eq 'not_owner') {
2026: if (-e $fname) {
2027: my ($dev,$ino,$mode,$nlink,
2028: $uid,$gid,$rdev,$size,
2029: $atime,$mtime,$ctime,
2030: $blksize,$blocks)=stat($fname);
2031: my $now=time;
2032: my $since=$now-$atime;
2033: if ($since>$perlvar{'lonExpire'}) {
2034: my $reply=
2035: &reply("unsub:$fname","$clientname");
2036: unlink("$fname");
2037: } else {
2038: my $transname="$fname.in.transfer";
2039: my $remoteurl=
2040: &reply("sub:$fname","$clientname");
2041: my $response;
2042: {
2043: my $ua=new LWP::UserAgent;
2044: my $request=new HTTP::Request('GET',"$remoteurl");
2045: $response=$ua->request($request,$transname);
2046: }
2047: if ($response->is_error()) {
2048: unlink($transname);
2049: my $message=$response->status_line;
2050: &logthis(
2051: "LWP GET: $message for $fname ($remoteurl)");
2052: } else {
2053: if ($remoteurl!~/\.meta$/) {
2054: my $ua=new LWP::UserAgent;
2055: my $mrequest=
2056: new HTTP::Request('GET',$remoteurl.'.meta');
2057: my $mresponse=
2058: $ua->request($mrequest,$fname.'.meta');
2059: if ($mresponse->is_error()) {
2060: unlink($fname.'.meta');
2061: }
2062: }
2063: rename($transname,$fname);
2064: }
2065: }
2066: print $client "ok\n";
2067: } else {
2068: print $client "not_found\n";
2069: }
2070: } else {
2071: print $client "rejected\n";
2072: }
2073: } else {
2074: Reply($client, "refused\n", $userinput);
2075:
2076: }
2077: # -------------------------------------- fetch a user file from a remote server
2078: } elsif ($userinput =~ /^fetchuserfile/) { # Client clear or enc.
2079: if(isClient) {
2080: my ($cmd,$fname)=split(/:/,$userinput);
2081: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
2082: my $udir=propath($udom,$uname).'/userfiles';
2083: unless (-e $udir) { mkdir($udir,0770); }
2084: if (-e $udir) {
2085: $ufile=~s/^[\.\~]+//;
2086: my $path = $udir;
2087: if ($ufile =~m|(.+)/([^/]+)$|) {
2088: my @parts=split('/',$1);
2089: foreach my $part (@parts) {
2090: $path .= '/'.$part;
2091: if ((-e $path)!=1) {
2092: mkdir($path,0770);
2093: }
2094: }
2095: }
2096: my $destname=$udir.'/'.$ufile;
2097: my $transname=$udir.'/'.$ufile.'.in.transit';
2098: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
2099: my $response;
2100: {
2101: my $ua=new LWP::UserAgent;
2102: my $request=new HTTP::Request('GET',"$remoteurl");
2103: $response=$ua->request($request,$transname);
2104: }
2105: if ($response->is_error()) {
2106: unlink($transname);
2107: my $message=$response->status_line;
2108: &logthis("LWP GET: $message for $fname ($remoteurl)");
2109: print $client "failed\n";
2110: } else {
2111: if (!rename($transname,$destname)) {
2112: &logthis("Unable to move $transname to $destname");
2113: unlink($transname);
2114: print $client "failed\n";
2115: } else {
2116: print $client "ok\n";
2117: }
2118: }
2119: } else {
2120: print $client "not_home\n";
2121: }
2122: } else {
2123: Reply($client, "refused\n", $userinput);
2124: }
2125: # --------------------------------------------------------- remove a user file
2126: } elsif ($userinput =~ /^removeuserfile/) { # Client clear or enc.
2127: if(isClient) {
2128: my ($cmd,$fname)=split(/:/,$userinput);
2129: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
2130: &logthis("$udom - $uname - $ufile");
2131: if ($ufile =~m|/\.\./|) {
2132: # any files paths with /../ in them refuse
2133: # to deal with
2134: print $client "refused\n";
2135: } else {
2136: my $udir=propath($udom,$uname);
2137: if (-e $udir) {
2138: my $file=$udir.'/userfiles/'.$ufile;
2139: if (-e $file) {
2140: unlink($file);
2141: if (-e $file) {
2142: print $client "failed\n";
2143: } else {
2144: print $client "ok\n";
2145: }
2146: } else {
2147: print $client "not_found\n";
2148: }
2149: } else {
2150: print $client "not_home\n";
2151: }
2152: }
2153: } else {
2154: Reply($client, "refused\n", $userinput);
2155: }
2156: # ------------------------------------------ authenticate access to a user file
2157: } elsif ($userinput =~ /^tokenauthuserfile/) { # Client only
2158: if(isClient) {
2159: my ($cmd,$fname,$session)=split(/:/,$userinput);
2160: chomp($session);
2161: my $reply='non_auth';
2162: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
2163: $session.'.id')) {
2164: while (my $line=<ENVIN>) {
2165: if ($line=~ m|userfile\.\Q$fname\E\=|) { $reply='ok'; }
2166: }
2167: close(ENVIN);
2168: print $client $reply."\n";
2169: } else {
2170: print $client "invalid_token\n";
2171: }
2172: } else {
2173: Reply($client, "refused\n", $userinput);
2174:
2175: }
2176: # ----------------------------------------------------------------- unsubscribe
2177: } elsif ($userinput =~ /^unsub/) {
2178: if(isClient) {
2179: my ($cmd,$fname)=split(/:/,$userinput);
2180: if (-e $fname) {
2181: print $client &unsub($fname,$clientip);
2182: } else {
2183: print $client "not_found\n";
2184: }
2185: } else {
2186: Reply($client, "refused\n", $userinput);
2187:
2188: }
2189: # ------------------------------------------------------------------- subscribe
2190: } elsif ($userinput =~ /^sub/) {
2191: if(isClient) {
2192: print $client &subscribe($userinput,$clientip);
2193: } else {
2194: Reply($client, "refused\n", $userinput);
2195:
2196: }
2197: # ------------------------------------------------------------- current version
2198: } elsif ($userinput =~ /^currentversion/) {
2199: if(isClient) {
2200: my ($cmd,$fname)=split(/:/,$userinput);
2201: print $client ¤tversion($fname)."\n";
2202: } else {
2203: Reply($client, "refused\n", $userinput);
2204:
2205: }
2206: # ------------------------------------------------------------------------- log
2207: } elsif ($userinput =~ /^log/) {
2208: if(isClient) {
2209: my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
2210: chomp($what);
2211: my $proname=propath($udom,$uname);
2212: my $now=time;
2213: {
2214: my $hfh;
2215: if ($hfh=IO::File->new(">>$proname/activity.log")) {
2216: print $hfh "$now:$clientname:$what\n";
2217: print $client "ok\n";
2218: } else {
2219: print $client "error: ".($!+0)
2220: ." IO::File->new Failed "
2221: ."while attempting log\n";
2222: }
2223: }
2224: } else {
2225: Reply($client, "refused\n", $userinput);
2226:
2227: }
2228: # ------------------------------------------------------------------------- put
2229: } elsif ($userinput =~ /^put/) {
2230: if(isClient) {
2231: my ($cmd,$udom,$uname,$namespace,$what)
2232: =split(/:/,$userinput);
2233: $namespace=~s/\//\_/g;
2234: $namespace=~s/\W//g;
2235: if ($namespace ne 'roles') {
2236: chomp($what);
2237: my $proname=propath($udom,$uname);
2238: my $now=time;
2239: unless ($namespace=~/^nohist\_/) {
2240: my $hfh;
2241: if (
2242: $hfh=IO::File->new(">>$proname/$namespace.hist")
2243: ) { print $hfh "P:$now:$what\n"; }
2244: }
2245: my @pairs=split(/\&/,$what);
2246: my %hash;
2247: if (tie(%hash,'GDBM_File',
2248: "$proname/$namespace.db",
2249: &GDBM_WRCREAT(),0640)) {
2250: foreach my $pair (@pairs) {
2251: my ($key,$value)=split(/=/,$pair);
2252: $hash{$key}=$value;
2253: }
2254: if (untie(%hash)) {
2255: print $client "ok\n";
2256: } else {
2257: print $client "error: ".($!+0)
2258: ." untie(GDBM) failed ".
2259: "while attempting put\n";
2260: }
2261: } else {
2262: print $client "error: ".($!)
2263: ." tie(GDBM) Failed ".
2264: "while attempting put\n";
2265: }
2266: } else {
2267: print $client "refused\n";
2268: }
2269: } else {
2270: Reply($client, "refused\n", $userinput);
2271:
2272: }
2273: # ------------------------------------------------------------------- inc
2274: } elsif ($userinput =~ /^inc:/) {
2275: if(isClient) {
2276: my ($cmd,$udom,$uname,$namespace,$what)
2277: =split(/:/,$userinput);
2278: $namespace=~s/\//\_/g;
2279: $namespace=~s/\W//g;
2280: if ($namespace ne 'roles') {
2281: chomp($what);
2282: my $proname=propath($udom,$uname);
2283: my $now=time;
2284: unless ($namespace=~/^nohist\_/) {
2285: my $hfh;
2286: if (
2287: $hfh=IO::File->new(">>$proname/$namespace.hist")
2288: ) { print $hfh "P:$now:$what\n"; }
2289: }
2290: my @pairs=split(/\&/,$what);
2291: my %hash;
2292: if (tie(%hash,'GDBM_File',
2293: "$proname/$namespace.db",
2294: &GDBM_WRCREAT(),0640)) {
2295: foreach my $pair (@pairs) {
2296: my ($key,$value)=split(/=/,$pair);
2297: # We could check that we have a number...
2298: if (! defined($value) || $value eq '') {
2299: $value = 1;
2300: }
2301: $hash{$key}+=$value;
2302: }
2303: if (untie(%hash)) {
2304: print $client "ok\n";
2305: } else {
2306: print $client "error: ".($!+0)
2307: ." untie(GDBM) failed ".
2308: "while attempting inc\n";
2309: }
2310: } else {
2311: print $client "error: ".($!)
2312: ." tie(GDBM) Failed ".
2313: "while attempting inc\n";
2314: }
2315: } else {
2316: print $client "refused\n";
2317: }
2318: } else {
2319: Reply($client, "refused\n", $userinput);
2320:
2321: }
2322: # -------------------------------------------------------------------- rolesput
2323: } elsif ($userinput =~ /^rolesput/) {
2324: if(isClient) {
2325: &Debug("rolesput");
2326: if ($wasenc==1) {
2327: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
2328: =split(/:/,$userinput);
2329: &Debug("cmd = ".$cmd." exedom= ".$exedom.
2330: "user = ".$exeuser." udom=".$udom.
2331: "what = ".$what);
2332: my $namespace='roles';
2333: chomp($what);
2334: my $proname=propath($udom,$uname);
2335: my $now=time;
2336: {
2337: my $hfh;
2338: if (
2339: $hfh=IO::File->new(">>$proname/$namespace.hist")
2340: ) {
2341: print $hfh "P:$now:$exedom:$exeuser:$what\n";
2342: }
2343: }
2344: my @pairs=split(/\&/,$what);
2345: my %hash;
2346: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2347: foreach my $pair (@pairs) {
2348: my ($key,$value)=split(/=/,$pair);
2349: &ManagePermissions($key, $udom, $uname,
2350: &GetAuthType( $udom,
2351: $uname));
2352: $hash{$key}=$value;
2353: }
2354: if (untie(%hash)) {
2355: print $client "ok\n";
2356: } else {
2357: print $client "error: ".($!+0)
2358: ." untie(GDBM) Failed ".
2359: "while attempting rolesput\n";
2360: }
2361: } else {
2362: print $client "error: ".($!+0)
2363: ." tie(GDBM) Failed ".
2364: "while attempting rolesput\n";
2365: }
2366: } else {
2367: print $client "refused\n";
2368: }
2369: } else {
2370: Reply($client, "refused\n", $userinput);
2371:
2372: }
2373: # -------------------------------------------------------------------- rolesdel
2374: } elsif ($userinput =~ /^rolesdel/) {
2375: if(isClient) {
2376: &Debug("rolesdel");
2377: if ($wasenc==1) {
2378: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
2379: =split(/:/,$userinput);
2380: &Debug("cmd = ".$cmd." exedom= ".$exedom.
2381: "user = ".$exeuser." udom=".$udom.
2382: "what = ".$what);
2383: my $namespace='roles';
2384: chomp($what);
2385: my $proname=propath($udom,$uname);
2386: my $now=time;
2387: {
2388: my $hfh;
2389: if (
2390: $hfh=IO::File->new(">>$proname/$namespace.hist")
2391: ) {
2392: print $hfh "D:$now:$exedom:$exeuser:$what\n";
2393: }
2394: }
2395: my @rolekeys=split(/\&/,$what);
2396: my %hash;
2397: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2398: foreach my $key (@rolekeys) {
2399: delete $hash{$key};
2400: }
2401: if (untie(%hash)) {
2402: print $client "ok\n";
2403: } else {
2404: print $client "error: ".($!+0)
2405: ." untie(GDBM) Failed ".
2406: "while attempting rolesdel\n";
2407: }
2408: } else {
2409: print $client "error: ".($!+0)
2410: ." tie(GDBM) Failed ".
2411: "while attempting rolesdel\n";
2412: }
2413: } else {
2414: print $client "refused\n";
2415: }
2416: } else {
2417: Reply($client, "refused\n", $userinput);
2418:
2419: }
2420: # ------------------------------------------------------------------------- get
2421: } elsif ($userinput =~ /^get/) {
2422: if(isClient) {
2423: my ($cmd,$udom,$uname,$namespace,$what)
2424: =split(/:/,$userinput);
2425: $namespace=~s/\//\_/g;
2426: $namespace=~s/\W//g;
2427: chomp($what);
2428: my @queries=split(/\&/,$what);
2429: my $proname=propath($udom,$uname);
2430: my $qresult='';
2431: my %hash;
2432: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2433: for (my $i=0;$i<=$#queries;$i++) {
2434: $qresult.="$hash{$queries[$i]}&";
2435: }
2436: if (untie(%hash)) {
2437: $qresult=~s/\&$//;
2438: print $client "$qresult\n";
2439: } else {
2440: print $client "error: ".($!+0)
2441: ." untie(GDBM) Failed ".
2442: "while attempting get\n";
2443: }
2444: } else {
2445: if ($!+0 == 2) {
2446: print $client "error:No such file or ".
2447: "GDBM reported bad block error\n";
2448: } else {
2449: print $client "error: ".($!+0)
2450: ." tie(GDBM) Failed ".
2451: "while attempting get\n";
2452: }
2453: }
2454: } else {
2455: Reply($client, "refused\n", $userinput);
2456:
2457: }
2458: # ------------------------------------------------------------------------ eget
2459: } elsif ($userinput =~ /^eget/) {
2460: if (isClient) {
2461: my ($cmd,$udom,$uname,$namespace,$what)
2462: =split(/:/,$userinput);
2463: $namespace=~s/\//\_/g;
2464: $namespace=~s/\W//g;
2465: chomp($what);
2466: my @queries=split(/\&/,$what);
2467: my $proname=propath($udom,$uname);
2468: my $qresult='';
2469: my %hash;
2470: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2471: for (my $i=0;$i<=$#queries;$i++) {
2472: $qresult.="$hash{$queries[$i]}&";
2473: }
2474: if (untie(%hash)) {
2475: $qresult=~s/\&$//;
2476: if ($cipher) {
2477: my $cmdlength=length($qresult);
2478: $qresult.=" ";
2479: my $encqresult='';
2480: for
2481: (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
2482: $encqresult.=
2483: unpack("H16",
2484: $cipher->encrypt(substr($qresult,$encidx,8)));
2485: }
2486: print $client "enc:$cmdlength:$encqresult\n";
2487: } else {
2488: print $client "error:no_key\n";
2489: }
2490: } else {
2491: print $client "error: ".($!+0)
2492: ." untie(GDBM) Failed ".
2493: "while attempting eget\n";
2494: }
2495: } else {
2496: print $client "error: ".($!+0)
2497: ." tie(GDBM) Failed ".
2498: "while attempting eget\n";
2499: }
2500: } else {
2501: Reply($client, "refused\n", $userinput);
2502:
2503: }
2504: # ------------------------------------------------------------------------- del
2505: } elsif ($userinput =~ /^del/) {
2506: if(isClient) {
2507: my ($cmd,$udom,$uname,$namespace,$what)
2508: =split(/:/,$userinput);
2509: $namespace=~s/\//\_/g;
2510: $namespace=~s/\W//g;
2511: chomp($what);
2512: my $proname=propath($udom,$uname);
2513: my $now=time;
2514: unless ($namespace=~/^nohist\_/) {
2515: my $hfh;
2516: if (
2517: $hfh=IO::File->new(">>$proname/$namespace.hist")
2518: ) { print $hfh "D:$now:$what\n"; }
2519: }
2520: my @keys=split(/\&/,$what);
2521: my %hash;
2522: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2523: foreach my $key (@keys) {
2524: delete($hash{$key});
2525: }
2526: if (untie(%hash)) {
2527: print $client "ok\n";
2528: } else {
2529: print $client "error: ".($!+0)
2530: ." untie(GDBM) Failed ".
2531: "while attempting del\n";
2532: }
2533: } else {
2534: print $client "error: ".($!+0)
2535: ." tie(GDBM) Failed ".
2536: "while attempting del\n";
2537: }
2538: } else {
2539: Reply($client, "refused\n", $userinput);
2540:
2541: }
2542: # ------------------------------------------------------------------------ keys
2543: } elsif ($userinput =~ /^keys/) {
2544: if(isClient) {
2545: my ($cmd,$udom,$uname,$namespace)
2546: =split(/:/,$userinput);
2547: $namespace=~s/\//\_/g;
2548: $namespace=~s/\W//g;
2549: my $proname=propath($udom,$uname);
2550: my $qresult='';
2551: my %hash;
2552: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2553: foreach my $key (keys %hash) {
2554: $qresult.="$key&";
2555: }
2556: if (untie(%hash)) {
2557: $qresult=~s/\&$//;
2558: print $client "$qresult\n";
2559: } else {
2560: print $client "error: ".($!+0)
2561: ." untie(GDBM) Failed ".
2562: "while attempting keys\n";
2563: }
2564: } else {
2565: print $client "error: ".($!+0)
2566: ." tie(GDBM) Failed ".
2567: "while attempting keys\n";
2568: }
2569: } else {
2570: Reply($client, "refused\n", $userinput);
2571:
2572: }
2573: # ----------------------------------------------------------------- dumpcurrent
2574: } elsif ($userinput =~ /^currentdump/) {
2575: if (isClient) {
2576: my ($cmd,$udom,$uname,$namespace)
2577: =split(/:/,$userinput);
2578: $namespace=~s/\//\_/g;
2579: $namespace=~s/\W//g;
2580: my $qresult='';
2581: my $proname=propath($udom,$uname);
2582: my %hash;
2583: if (tie(%hash,'GDBM_File',
2584: "$proname/$namespace.db",
2585: &GDBM_READER(),0640)) {
2586: # Structure of %data:
2587: # $data{$symb}->{$parameter}=$value;
2588: # $data{$symb}->{'v.'.$parameter}=$version;
2589: # since $parameter will be unescaped, we do not
2590: # have to worry about silly parameter names...
2591: my %data = ();
2592: while (my ($key,$value) = each(%hash)) {
2593: my ($v,$symb,$param) = split(/:/,$key);
2594: next if ($v eq 'version' || $symb eq 'keys');
2595: next if (exists($data{$symb}) &&
2596: exists($data{$symb}->{$param}) &&
2597: $data{$symb}->{'v.'.$param} > $v);
2598: $data{$symb}->{$param}=$value;
2599: $data{$symb}->{'v.'.$param}=$v;
2600: }
2601: if (untie(%hash)) {
2602: while (my ($symb,$param_hash) = each(%data)) {
2603: while(my ($param,$value) = each (%$param_hash)){
2604: next if ($param =~ /^v\./);
2605: $qresult.=$symb.':'.$param.'='.$value.'&';
2606: }
2607: }
2608: chop($qresult);
2609: print $client "$qresult\n";
2610: } else {
2611: print $client "error: ".($!+0)
2612: ." untie(GDBM) Failed ".
2613: "while attempting currentdump\n";
2614: }
2615: } else {
2616: print $client "error: ".($!+0)
2617: ." tie(GDBM) Failed ".
2618: "while attempting currentdump\n";
2619: }
2620: } else {
2621: Reply($client, "refused\n", $userinput);
2622: }
2623: # ------------------------------------------------------------------------ dump
2624: } elsif ($userinput =~ /^dump/) {
2625: if(isClient) {
2626: my ($cmd,$udom,$uname,$namespace,$regexp)
2627: =split(/:/,$userinput);
2628: $namespace=~s/\//\_/g;
2629: $namespace=~s/\W//g;
2630: if (defined($regexp)) {
2631: $regexp=&unescape($regexp);
2632: } else {
2633: $regexp='.';
2634: }
2635: my $qresult='';
2636: my $proname=propath($udom,$uname);
2637: my %hash;
2638: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2639: while (my ($key,$value) = each(%hash)) {
2640: if ($regexp eq '.') {
2641: $qresult.=$key.'='.$value.'&';
2642: } else {
2643: my $unescapeKey = &unescape($key);
2644: if (eval('$unescapeKey=~/$regexp/')) {
2645: $qresult.="$key=$value&";
2646: }
2647: }
2648: }
2649: if (untie(%hash)) {
2650: chop($qresult);
2651: print $client "$qresult\n";
2652: } else {
2653: print $client "error: ".($!+0)
2654: ." untie(GDBM) Failed ".
2655: "while attempting dump\n";
2656: }
2657: } else {
2658: print $client "error: ".($!+0)
2659: ." tie(GDBM) Failed ".
2660: "while attempting dump\n";
2661: }
2662: } else {
2663: Reply($client, "refused\n", $userinput);
2664:
2665: }
2666: # ----------------------------------------------------------------------- store
2667: } elsif ($userinput =~ /^store/) {
2668: if(isClient) {
2669: my ($cmd,$udom,$uname,$namespace,$rid,$what)
2670: =split(/:/,$userinput);
2671: $namespace=~s/\//\_/g;
2672: $namespace=~s/\W//g;
2673: if ($namespace ne 'roles') {
2674: chomp($what);
2675: my $proname=propath($udom,$uname);
2676: my $now=time;
2677: unless ($namespace=~/^nohist\_/) {
2678: my $hfh;
2679: if (
2680: $hfh=IO::File->new(">>$proname/$namespace.hist")
2681: ) { print $hfh "P:$now:$rid:$what\n"; }
2682: }
2683: my @pairs=split(/\&/,$what);
2684: my %hash;
2685: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2686: my @previouskeys=split(/&/,$hash{"keys:$rid"});
2687: my $key;
2688: $hash{"version:$rid"}++;
2689: my $version=$hash{"version:$rid"};
2690: my $allkeys='';
2691: foreach my $pair (@pairs) {
2692: my ($key,$value)=split(/=/,$pair);
2693: $allkeys.=$key.':';
2694: $hash{"$version:$rid:$key"}=$value;
2695: }
2696: $hash{"$version:$rid:timestamp"}=$now;
2697: $allkeys.='timestamp';
2698: $hash{"$version:keys:$rid"}=$allkeys;
2699: if (untie(%hash)) {
2700: print $client "ok\n";
2701: } else {
2702: print $client "error: ".($!+0)
2703: ." untie(GDBM) Failed ".
2704: "while attempting store\n";
2705: }
2706: } else {
2707: print $client "error: ".($!+0)
2708: ." tie(GDBM) Failed ".
2709: "while attempting store\n";
2710: }
2711: } else {
2712: print $client "refused\n";
2713: }
2714: } else {
2715: Reply($client, "refused\n", $userinput);
2716:
2717: }
2718: # --------------------------------------------------------------------- restore
2719: } elsif ($userinput =~ /^restore/) {
2720: if(isClient) {
2721: my ($cmd,$udom,$uname,$namespace,$rid)
2722: =split(/:/,$userinput);
2723: $namespace=~s/\//\_/g;
2724: $namespace=~s/\W//g;
2725: chomp($rid);
2726: my $proname=propath($udom,$uname);
2727: my $qresult='';
2728: my %hash;
2729: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2730: my $version=$hash{"version:$rid"};
2731: $qresult.="version=$version&";
2732: my $scope;
2733: for ($scope=1;$scope<=$version;$scope++) {
2734: my $vkeys=$hash{"$scope:keys:$rid"};
2735: my @keys=split(/:/,$vkeys);
2736: my $key;
2737: $qresult.="$scope:keys=$vkeys&";
2738: foreach $key (@keys) {
2739: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
2740: }
2741: }
2742: if (untie(%hash)) {
2743: $qresult=~s/\&$//;
2744: print $client "$qresult\n";
2745: } else {
2746: print $client "error: ".($!+0)
2747: ." untie(GDBM) Failed ".
2748: "while attempting restore\n";
2749: }
2750: } else {
2751: print $client "error: ".($!+0)
2752: ." tie(GDBM) Failed ".
2753: "while attempting restore\n";
2754: }
2755: } else {
2756: Reply($client, "refused\n", $userinput);
2757:
2758: }
2759: # -------------------------------------------------------------------- chatsend
2760: } elsif ($userinput =~ /^chatsend/) {
2761: if(isClient) {
2762: my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
2763: &chatadd($cdom,$cnum,$newpost);
2764: print $client "ok\n";
2765: } else {
2766: Reply($client, "refused\n", $userinput);
2767:
2768: }
2769: # -------------------------------------------------------------------- chatretr
2770: } elsif ($userinput =~ /^chatretr/) {
2771: if(isClient) {
2772: my
2773: ($cmd,$cdom,$cnum,$udom,$uname)=split(/\:/,$userinput);
2774: my $reply='';
2775: foreach (&getchat($cdom,$cnum,$udom,$uname)) {
2776: $reply.=&escape($_).':';
2777: }
2778: $reply=~s/\:$//;
2779: print $client $reply."\n";
2780: } else {
2781: Reply($client, "refused\n", $userinput);
2782:
2783: }
2784: # ------------------------------------------------------------------- querysend
2785: } elsif ($userinput =~ /^querysend/) {
2786: if (isClient) {
2787: my ($cmd,$query,
2788: $arg1,$arg2,$arg3)=split(/\:/,$userinput);
2789: $query=~s/\n*$//g;
2790: print $client "".
2791: sqlreply("$clientname\&$query".
2792: "\&$arg1"."\&$arg2"."\&$arg3")."\n";
2793: } else {
2794: Reply($client, "refused\n", $userinput);
2795:
2796: }
2797: # ------------------------------------------------------------------ queryreply
2798: } elsif ($userinput =~ /^queryreply/) {
2799: if(isClient) {
2800: my ($cmd,$id,$reply)=split(/:/,$userinput);
2801: my $store;
2802: my $execdir=$perlvar{'lonDaemons'};
2803: if ($store=IO::File->new(">$execdir/tmp/$id")) {
2804: $reply=~s/\&/\n/g;
2805: print $store $reply;
2806: close $store;
2807: my $store2=IO::File->new(">$execdir/tmp/$id.end");
2808: print $store2 "done\n";
2809: close $store2;
2810: print $client "ok\n";
2811: }
2812: else {
2813: print $client "error: ".($!+0)
2814: ." IO::File->new Failed ".
2815: "while attempting queryreply\n";
2816: }
2817: } else {
2818: Reply($client, "refused\n", $userinput);
2819:
2820: }
2821: # ----------------------------------------------------------------- courseidput
2822: } elsif ($userinput =~ /^courseidput/) {
2823: if(isClient) {
2824: my ($cmd,$udom,$what)=split(/:/,$userinput);
2825: chomp($what);
2826: $udom=~s/\W//g;
2827: my $proname=
2828: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
2829: my $now=time;
2830: my @pairs=split(/\&/,$what);
2831: my %hash;
2832: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
2833: foreach my $pair (@pairs) {
2834: my ($key,$value)=split(/=/,$pair);
2835: $hash{$key}=$value.':'.$now;
2836: }
2837: if (untie(%hash)) {
2838: print $client "ok\n";
2839: } else {
2840: print $client "error: ".($!+0)
2841: ." untie(GDBM) Failed ".
2842: "while attempting courseidput\n";
2843: }
2844: } else {
2845: print $client "error: ".($!+0)
2846: ." tie(GDBM) Failed ".
2847: "while attempting courseidput\n";
2848: }
2849: } else {
2850: Reply($client, "refused\n", $userinput);
2851:
2852: }
2853: # ---------------------------------------------------------------- courseiddump
2854: } elsif ($userinput =~ /^courseiddump/) {
2855: if(isClient) {
2856: my ($cmd,$udom,$since,$description)
2857: =split(/:/,$userinput);
2858: if (defined($description)) {
2859: $description=&unescape($description);
2860: } else {
2861: $description='.';
2862: }
2863: unless (defined($since)) { $since=0; }
2864: my $qresult='';
2865: my $proname=
2866: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
2867: my %hash;
2868: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
2869: while (my ($key,$value) = each(%hash)) {
2870: my ($descr,$lasttime)=split(/\:/,$value);
2871: if ($lasttime<$since) { next; }
2872: if ($description eq '.') {
2873: $qresult.=$key.'='.$descr.'&';
2874: } else {
2875: my $unescapeVal = &unescape($descr);
2876: if (eval('$unescapeVal=~/\Q$description\E/i')) {
2877: $qresult.="$key=$descr&";
2878: }
2879: }
2880: }
2881: if (untie(%hash)) {
2882: chop($qresult);
2883: print $client "$qresult\n";
2884: } else {
2885: print $client "error: ".($!+0)
2886: ." untie(GDBM) Failed ".
2887: "while attempting courseiddump\n";
2888: }
2889: } else {
2890: print $client "error: ".($!+0)
2891: ." tie(GDBM) Failed ".
2892: "while attempting courseiddump\n";
2893: }
2894: } else {
2895: Reply($client, "refused\n", $userinput);
2896:
2897: }
2898: # ----------------------------------------------------------------------- idput
2899: } elsif ($userinput =~ /^idput/) {
2900: if(isClient) {
2901: my ($cmd,$udom,$what)=split(/:/,$userinput);
2902: chomp($what);
2903: $udom=~s/\W//g;
2904: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
2905: my $now=time;
2906: {
2907: my $hfh;
2908: if (
2909: $hfh=IO::File->new(">>$proname.hist")
2910: ) { print $hfh "P:$now:$what\n"; }
2911: }
2912: my @pairs=split(/\&/,$what);
2913: my %hash;
2914: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
2915: foreach my $pair (@pairs) {
2916: my ($key,$value)=split(/=/,$pair);
2917: $hash{$key}=$value;
2918: }
2919: if (untie(%hash)) {
2920: print $client "ok\n";
2921: } else {
2922: print $client "error: ".($!+0)
2923: ." untie(GDBM) Failed ".
2924: "while attempting idput\n";
2925: }
2926: } else {
2927: print $client "error: ".($!+0)
2928: ." tie(GDBM) Failed ".
2929: "while attempting idput\n";
2930: }
2931: } else {
2932: Reply($client, "refused\n", $userinput);
2933:
2934: }
2935: # ----------------------------------------------------------------------- idget
2936: } elsif ($userinput =~ /^idget/) {
2937: if(isClient) {
2938: my ($cmd,$udom,$what)=split(/:/,$userinput);
2939: chomp($what);
2940: $udom=~s/\W//g;
2941: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
2942: my @queries=split(/\&/,$what);
2943: my $qresult='';
2944: my %hash;
2945: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
2946: for (my $i=0;$i<=$#queries;$i++) {
2947: $qresult.="$hash{$queries[$i]}&";
2948: }
2949: if (untie(%hash)) {
2950: $qresult=~s/\&$//;
2951: print $client "$qresult\n";
2952: } else {
2953: print $client "error: ".($!+0)
2954: ." untie(GDBM) Failed ".
2955: "while attempting idget\n";
2956: }
2957: } else {
2958: print $client "error: ".($!+0)
2959: ." tie(GDBM) Failed ".
2960: "while attempting idget\n";
2961: }
2962: } else {
2963: Reply($client, "refused\n", $userinput);
2964:
2965: }
2966: # ---------------------------------------------------------------------- tmpput
2967: } elsif ($userinput =~ /^tmpput/) {
2968: if(isClient) {
2969: my ($cmd,$what)=split(/:/,$userinput);
2970: my $store;
2971: $tmpsnum++;
2972: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
2973: $id=~s/\W/\_/g;
2974: $what=~s/\n//g;
2975: my $execdir=$perlvar{'lonDaemons'};
2976: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
2977: print $store $what;
2978: close $store;
2979: print $client "$id\n";
2980: }
2981: else {
2982: print $client "error: ".($!+0)
2983: ."IO::File->new Failed ".
2984: "while attempting tmpput\n";
2985: }
2986: } else {
2987: Reply($client, "refused\n", $userinput);
2988:
2989: }
2990:
2991: # ---------------------------------------------------------------------- tmpget
2992: } elsif ($userinput =~ /^tmpget/) {
2993: if(isClient) {
2994: my ($cmd,$id)=split(/:/,$userinput);
2995: chomp($id);
2996: $id=~s/\W/\_/g;
2997: my $store;
2998: my $execdir=$perlvar{'lonDaemons'};
2999: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
3000: my $reply=<$store>;
3001: print $client "$reply\n";
3002: close $store;
3003: }
3004: else {
3005: print $client "error: ".($!+0)
3006: ."IO::File->new Failed ".
3007: "while attempting tmpget\n";
3008: }
3009: } else {
3010: Reply($client, "refused\n", $userinput);
3011:
3012: }
3013: # ---------------------------------------------------------------------- tmpdel
3014: } elsif ($userinput =~ /^tmpdel/) {
3015: if(isClient) {
3016: my ($cmd,$id)=split(/:/,$userinput);
3017: chomp($id);
3018: $id=~s/\W/\_/g;
3019: my $execdir=$perlvar{'lonDaemons'};
3020: if (unlink("$execdir/tmp/$id.tmp")) {
3021: print $client "ok\n";
3022: } else {
3023: print $client "error: ".($!+0)
3024: ."Unlink tmp Failed ".
3025: "while attempting tmpdel\n";
3026: }
3027: } else {
3028: Reply($client, "refused\n", $userinput);
3029:
3030: }
3031: # -------------------------------------------------------------------------- ls
3032: } elsif ($userinput =~ /^ls/) {
3033: if(isClient) {
3034: my $obs;
3035: my $rights;
3036: my ($cmd,$ulsdir)=split(/:/,$userinput);
3037: my $ulsout='';
3038: my $ulsfn;
3039: if (-e $ulsdir) {
3040: if(-d $ulsdir) {
3041: if (opendir(LSDIR,$ulsdir)) {
3042: while ($ulsfn=readdir(LSDIR)) {
3043: undef $obs, $rights;
3044: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
3045: #We do some obsolete checking here
3046: if(-e $ulsdir.'/'.$ulsfn.".meta") {
3047: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
3048: my @obsolete=<FILE>;
3049: foreach my $obsolete (@obsolete) {
3050: if($obsolete =~ m|(<obsolete>)(on)|) { $obs = 1; }
3051: if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
3052: }
3053: }
3054: $ulsout.=$ulsfn.'&'.join('&',@ulsstats);
3055: if($obs eq '1') { $ulsout.="&1"; }
3056: else { $ulsout.="&0"; }
3057: if($rights eq '1') { $ulsout.="&1:"; }
3058: else { $ulsout.="&0:"; }
3059: }
3060: closedir(LSDIR);
3061: }
3062: } else {
3063: my @ulsstats=stat($ulsdir);
3064: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
3065: }
3066: } else {
3067: $ulsout='no_such_dir';
3068: }
3069: if ($ulsout eq '') { $ulsout='empty'; }
3070: print $client "$ulsout\n";
3071: } else {
3072: Reply($client, "refused\n", $userinput);
3073:
3074: }
3075: # ----------------------------------------------------------------- setannounce
3076: } elsif ($userinput =~ /^setannounce/) {
3077: if (isClient) {
3078: my ($cmd,$announcement)=split(/:/,$userinput);
3079: chomp($announcement);
3080: $announcement=&unescape($announcement);
3081: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
3082: '/announcement.txt')) {
3083: print $store $announcement;
3084: close $store;
3085: print $client "ok\n";
3086: } else {
3087: print $client "error: ".($!+0)."\n";
3088: }
3089: } else {
3090: Reply($client, "refused\n", $userinput);
3091:
3092: }
3093: # ------------------------------------------------------------------ Hanging up
3094: } elsif (($userinput =~ /^exit/) ||
3095: ($userinput =~ /^init/)) { # no restrictions.
3096: &logthis(
3097: "Client $clientip ($clientname) hanging up: $userinput");
3098: print $client "bye\n";
3099: $client->shutdown(2); # shutdown the socket forcibly.
3100: $client->close();
3101: last;
3102:
3103: # ---------------------------------- set current host/domain
3104: } elsif ($userinput =~ /^sethost:/) {
3105: if (isClient) {
3106: print $client &sethost($userinput)."\n";
3107: } else {
3108: print $client "refused\n";
3109: }
3110: #---------------------------------- request file (?) version.
3111: } elsif ($userinput =~/^version:/) {
3112: if (isClient) {
3113: print $client &version($userinput)."\n";
3114: } else {
3115: print $client "refused\n";
3116: }
3117: #------------------------------- is auto-enrollment enabled?
3118: } elsif ($userinput =~/^autorun/) {
3119: if (isClient) {
3120: my $outcome = &localenroll::run();
3121: print $client "$outcome\n";
3122: } else {
3123: print $client "0\n";
3124: }
3125: #------------------------------- get official sections (for auto-enrollment).
3126: } elsif ($userinput =~/^autogetsections/) {
3127: if (isClient) {
3128: my ($cmd,$coursecode)=split(/:/,$userinput);
3129: my @secs = &localenroll::get_sections($coursecode);
3130: my $seclist = &escape(join(':',@secs));
3131: print $client "$seclist\n";
3132: } else {
3133: print $client "refused\n";
3134: }
3135: #----------------------- validate owner of new course section (for auto-enrollment).
3136: } elsif ($userinput =~/^autonewcourse/) {
3137: if (isClient) {
3138: my ($cmd,$course_id,$owner)=split(/:/,$userinput);
3139: my $outcome = &localenroll::new_course($course_id,$owner);
3140: print $client "$outcome\n";
3141: } else {
3142: print $client "refused\n";
3143: }
3144: #-------------- validate course section in schedule of classes (for auto-enrollment).
3145: } elsif ($userinput =~/^autovalidatecourse/) {
3146: if (isClient) {
3147: my ($cmd,$course_id)=split(/:/,$userinput);
3148: my $outcome=&localenroll::validate_courseID($course_id);
3149: print $client "$outcome\n";
3150: } else {
3151: print $client "refused\n";
3152: }
3153: #--------------------------- create password for new user (for auto-enrollment).
3154: } elsif ($userinput =~/^autocreatepassword/) {
3155: if (isClient) {
3156: my ($cmd,$authparam)=split(/:/,$userinput);
3157: my ($create_passwd,$authchk) = @_;
3158: ($authparam,$create_passwd,$authchk) = &localenroll::create_password($authparam);
3159: print $client &escape($authparam.':'.$create_passwd.':'.$authchk)."\n";
3160: } else {
3161: print $client "refused\n";
3162: }
3163: #--------------------------- read and remove temporary files (for auto-enrollment).
3164: } elsif ($userinput =~/^autoretrieve/) {
3165: if (isClient) {
3166: my ($cmd,$filename) = split(/:/,$userinput);
3167: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
3168: if ( (-e $source) && ($filename ne '') ) {
3169: my $reply = '';
3170: if (open(my $fh,$source)) {
3171: while (<$fh>) {
3172: chomp($_);
3173: $_ =~ s/^\s+//g;
3174: $_ =~ s/\s+$//g;
3175: $reply .= $_;
3176: }
3177: close($fh);
3178: print $client &escape($reply)."\n";
3179: # unlink($source);
3180: } else {
3181: print $client "error\n";
3182: }
3183: } else {
3184: print $client "error\n";
3185: }
3186: } else {
3187: print $client "refused\n";
3188: }
3189: # ------------------------------------------------------------- unknown command
3190:
3191: } else {
3192: # unknown command
3193: print $client "unknown_cmd\n";
3194: }
3195: # -------------------------------------------------------------------- complete
3196: alarm(0);
3197: &status('Listening to '.$clientname);
3198: }
3199: # --------------------------------------------- client unknown or fishy, refuse
3200: } else {
3201: print $client "refused\n";
3202: $client->close();
3203: &logthis("<font color='blue'>WARNING: "
3204: ."Rejected client $clientip, closing connection</font>");
3205: }
3206: }
3207:
3208: # =============================================================================
3209:
3210: &logthis("<font color='red'>CRITICAL: "
3211: ."Disconnect from $clientip ($clientname)</font>");
3212:
3213:
3214: # this exit is VERY important, otherwise the child will become
3215: # a producer of more and more children, forking yourself into
3216: # process death.
3217: exit;
3218:
3219: }
3220:
3221:
3222: #
3223: # Checks to see if the input roleput request was to set
3224: # an author role. If so, invokes the lchtmldir script to set
3225: # up a correct public_html
3226: # Parameters:
3227: # request - The request sent to the rolesput subchunk.
3228: # We're looking for /domain/_au
3229: # domain - The domain in which the user is having roles doctored.
3230: # user - Name of the user for which the role is being put.
3231: # authtype - The authentication type associated with the user.
3232: #
3233: sub ManagePermissions
3234: {
3235:
3236: my ($request, $domain, $user, $authtype) = @_;
3237:
3238: # See if the request is of the form /$domain/_au
3239: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
3240: my $execdir = $perlvar{'lonDaemons'};
3241: my $userhome= "/home/$user" ;
3242: &logthis("system $execdir/lchtmldir $userhome $user $authtype");
3243: system("$execdir/lchtmldir $userhome $user $authtype");
3244: }
3245: }
3246: #
3247: # GetAuthType - Determines the authorization type of a user in a domain.
3248:
3249: # Returns the authorization type or nouser if there is no such user.
3250: #
3251: sub GetAuthType
3252: {
3253:
3254: my ($domain, $user) = @_;
3255:
3256: Debug("GetAuthType( $domain, $user ) \n");
3257: my $proname = &propath($domain, $user);
3258: my $passwdfile = "$proname/passwd";
3259: if( -e $passwdfile ) {
3260: my $pf = IO::File->new($passwdfile);
3261: my $realpassword = <$pf>;
3262: chomp($realpassword);
3263: Debug("Password info = $realpassword\n");
3264: my ($authtype, $contentpwd) = split(/:/, $realpassword);
3265: Debug("Authtype = $authtype, content = $contentpwd\n");
3266: my $availinfo = '';
3267: if($authtype eq 'krb4' or $authtype eq 'krb5') {
3268: $availinfo = $contentpwd;
3269: }
3270:
3271: return "$authtype:$availinfo";
3272: }
3273: else {
3274: Debug("Returning nouser");
3275: return "nouser";
3276: }
3277: }
3278:
3279: sub addline {
3280: my ($fname,$hostid,$ip,$newline)=@_;
3281: my $contents;
3282: my $found=0;
3283: my $expr='^'.$hostid.':'.$ip.':';
3284: $expr =~ s/\./\\\./g;
3285: my $sh;
3286: if ($sh=IO::File->new("$fname.subscription")) {
3287: while (my $subline=<$sh>) {
3288: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
3289: }
3290: $sh->close();
3291: }
3292: $sh=IO::File->new(">$fname.subscription");
3293: if ($contents) { print $sh $contents; }
3294: if ($newline) { print $sh $newline; }
3295: $sh->close();
3296: return $found;
3297: }
3298:
3299: sub getchat {
3300: my ($cdom,$cname,$udom,$uname)=@_;
3301: my %hash;
3302: my $proname=&propath($cdom,$cname);
3303: my @entries=();
3304: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
3305: &GDBM_READER(),0640)) {
3306: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
3307: untie %hash;
3308: }
3309: my @participants=();
3310: my $cutoff=time-60;
3311: if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db",
3312: &GDBM_WRCREAT(),0640)) {
3313: $hash{$uname.':'.$udom}=time;
3314: foreach (sort keys %hash) {
3315: if ($hash{$_}>$cutoff) {
3316: $participants[$#participants+1]='active_participant:'.$_;
3317: }
3318: }
3319: untie %hash;
3320: }
3321: return (@participants,@entries);
3322: }
3323:
3324: sub chatadd {
3325: my ($cdom,$cname,$newchat)=@_;
3326: my %hash;
3327: my $proname=&propath($cdom,$cname);
3328: my @entries=();
3329: my $time=time;
3330: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
3331: &GDBM_WRCREAT(),0640)) {
3332: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
3333: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
3334: my ($thentime,$idnum)=split(/\_/,$lastid);
3335: my $newid=$time.'_000000';
3336: if ($thentime==$time) {
3337: $idnum=~s/^0+//;
3338: $idnum++;
3339: $idnum=substr('000000'.$idnum,-6,6);
3340: $newid=$time.'_'.$idnum;
3341: }
3342: $hash{$newid}=$newchat;
3343: my $expired=$time-3600;
3344: foreach (keys %hash) {
3345: my ($thistime)=($_=~/(\d+)\_/);
3346: if ($thistime<$expired) {
3347: delete $hash{$_};
3348: }
3349: }
3350: untie %hash;
3351: }
3352: {
3353: my $hfh;
3354: if ($hfh=IO::File->new(">>$proname/chatroom.log")) {
3355: print $hfh "$time:".&unescape($newchat)."\n";
3356: }
3357: }
3358: }
3359:
3360: sub unsub {
3361: my ($fname,$clientip)=@_;
3362: my $result;
3363: my $unsubs = 0; # Number of successful unsubscribes:
3364:
3365:
3366: # An old way subscriptions were handled was to have a
3367: # subscription marker file:
3368:
3369: Debug("Attempting unlink of $fname.$clientname");
3370: if (unlink("$fname.$clientname")) {
3371: $unsubs++; # Successful unsub via marker file.
3372: }
3373:
3374: # The more modern way to do it is to have a subscription list
3375: # file:
3376:
3377: if (-e "$fname.subscription") {
3378: my $found=&addline($fname,$clientname,$clientip,'');
3379: if ($found) {
3380: $unsubs++;
3381: }
3382: }
3383:
3384: # If either or both of these mechanisms succeeded in unsubscribing a
3385: # resource we can return ok:
3386:
3387: if($unsubs) {
3388: $result = "ok\n";
3389: } else {
3390: $result = "not_subscribed\n";
3391: }
3392:
3393: return $result;
3394: }
3395:
3396: sub currentversion {
3397: my $fname=shift;
3398: my $version=-1;
3399: my $ulsdir='';
3400: if ($fname=~/^(.+)\/[^\/]+$/) {
3401: $ulsdir=$1;
3402: }
3403: my ($fnamere1,$fnamere2);
3404: # remove version if already specified
3405: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
3406: # get the bits that go before and after the version number
3407: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
3408: $fnamere1=$1;
3409: $fnamere2='.'.$2;
3410: }
3411: if (-e $fname) { $version=1; }
3412: if (-e $ulsdir) {
3413: if(-d $ulsdir) {
3414: if (opendir(LSDIR,$ulsdir)) {
3415: my $ulsfn;
3416: while ($ulsfn=readdir(LSDIR)) {
3417: # see if this is a regular file (ignore links produced earlier)
3418: my $thisfile=$ulsdir.'/'.$ulsfn;
3419: unless (-l $thisfile) {
3420: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
3421: if ($1>$version) { $version=$1; }
3422: }
3423: }
3424: }
3425: closedir(LSDIR);
3426: $version++;
3427: }
3428: }
3429: }
3430: return $version;
3431: }
3432:
3433: sub thisversion {
3434: my $fname=shift;
3435: my $version=-1;
3436: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
3437: $version=$1;
3438: }
3439: return $version;
3440: }
3441:
3442: sub subscribe {
3443: my ($userinput,$clientip)=@_;
3444: my $result;
3445: my ($cmd,$fname)=split(/:/,$userinput);
3446: my $ownership=&ishome($fname);
3447: if ($ownership eq 'owner') {
3448: # explitly asking for the current version?
3449: unless (-e $fname) {
3450: my $currentversion=¤tversion($fname);
3451: if (&thisversion($fname)==$currentversion) {
3452: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
3453: my $root=$1;
3454: my $extension=$2;
3455: symlink($root.'.'.$extension,
3456: $root.'.'.$currentversion.'.'.$extension);
3457: unless ($extension=~/\.meta$/) {
3458: symlink($root.'.'.$extension.'.meta',
3459: $root.'.'.$currentversion.'.'.$extension.'.meta');
3460: }
3461: }
3462: }
3463: }
3464: if (-e $fname) {
3465: if (-d $fname) {
3466: $result="directory\n";
3467: } else {
3468: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
3469: my $now=time;
3470: my $found=&addline($fname,$clientname,$clientip,
3471: "$clientname:$clientip:$now\n");
3472: if ($found) { $result="$fname\n"; }
3473: # if they were subscribed to only meta data, delete that
3474: # subscription, when you subscribe to a file you also get
3475: # the metadata
3476: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
3477: $fname=~s/\/home\/httpd\/html\/res/raw/;
3478: $fname="http://$thisserver/".$fname;
3479: $result="$fname\n";
3480: }
3481: } else {
3482: $result="not_found\n";
3483: }
3484: } else {
3485: $result="rejected\n";
3486: }
3487: return $result;
3488: }
3489:
3490: sub make_passwd_file {
3491: my ($uname, $umode,$npass,$passfilename)=@_;
3492: my $result="ok\n";
3493: if ($umode eq 'krb4' or $umode eq 'krb5') {
3494: {
3495: my $pf = IO::File->new(">$passfilename");
3496: print $pf "$umode:$npass\n";
3497: }
3498: } elsif ($umode eq 'internal') {
3499: my $salt=time;
3500: $salt=substr($salt,6,2);
3501: my $ncpass=crypt($npass,$salt);
3502: {
3503: &Debug("Creating internal auth");
3504: my $pf = IO::File->new(">$passfilename");
3505: print $pf "internal:$ncpass\n";
3506: }
3507: } elsif ($umode eq 'localauth') {
3508: {
3509: my $pf = IO::File->new(">$passfilename");
3510: print $pf "localauth:$npass\n";
3511: }
3512: } elsif ($umode eq 'unix') {
3513: {
3514: #
3515: # Don't allow the creation of privileged accounts!!! that would
3516: # be real bad!!!
3517: #
3518: my $uid = getpwnam($uname);
3519: if((defined $uid) && ($uid == 0)) {
3520: &logthis(">>>Attempted to create privilged account blocked");
3521: return "no_priv_account_error\n";
3522: }
3523:
3524: my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
3525: {
3526: &Debug("Executing external: ".$execpath);
3527: &Debug("user = ".$uname.", Password =". $npass);
3528: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
3529: print $se "$uname\n";
3530: print $se "$npass\n";
3531: print $se "$npass\n";
3532: }
3533: my $useraddok = $?;
3534: if($useraddok > 0) {
3535: &logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));
3536: }
3537: my $pf = IO::File->new(">$passfilename");
3538: print $pf "unix:\n";
3539: }
3540: } elsif ($umode eq 'none') {
3541: {
3542: my $pf = IO::File->new(">$passfilename");
3543: print $pf "none:\n";
3544: }
3545: } else {
3546: $result="auth_mode_error\n";
3547: }
3548: return $result;
3549: }
3550:
3551: sub sethost {
3552: my ($remotereq) = @_;
3553: my (undef,$hostid)=split(/:/,$remotereq);
3554: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
3555: if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
3556: $currenthostid =$hostid;
3557: $currentdomainid=$hostdom{$hostid};
3558: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
3559: } else {
3560: &logthis("Requested host id $hostid not an alias of ".
3561: $perlvar{'lonHostID'}." refusing connection");
3562: return 'unable_to_set';
3563: }
3564: return 'ok';
3565: }
3566:
3567: sub version {
3568: my ($userinput)=@_;
3569: $remoteVERSION=(split(/:/,$userinput))[1];
3570: return "version:$VERSION";
3571: }
3572:
3573: #There is a copy of this in lonnet.pm
3574: sub userload {
3575: my $numusers=0;
3576: {
3577: opendir(LONIDS,$perlvar{'lonIDsDir'});
3578: my $filename;
3579: my $curtime=time;
3580: while ($filename=readdir(LONIDS)) {
3581: if ($filename eq '.' || $filename eq '..') {next;}
3582: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
3583: if ($curtime-$mtime < 1800) { $numusers++; }
3584: }
3585: closedir(LONIDS);
3586: }
3587: my $userloadpercent=0;
3588: my $maxuserload=$perlvar{'lonUserLoadLim'};
3589: if ($maxuserload) {
3590: $userloadpercent=100*$numusers/$maxuserload;
3591: }
3592: $userloadpercent=sprintf("%.2f",$userloadpercent);
3593: return $userloadpercent;
3594: }
3595:
3596:
3597: # ----------------------------------- POD (plain old documentation, CPAN style)
3598:
3599: =head1 NAME
3600:
3601: lond - "LON Daemon" Server (port "LOND" 5663)
3602:
3603: =head1 SYNOPSIS
3604:
3605: Usage: B<lond>
3606:
3607: Should only be run as user=www. This is a command-line script which
3608: is invoked by B<loncron>. There is no expectation that a typical user
3609: will manually start B<lond> from the command-line. (In other words,
3610: DO NOT START B<lond> YOURSELF.)
3611:
3612: =head1 DESCRIPTION
3613:
3614: There are two characteristics associated with the running of B<lond>,
3615: PROCESS MANAGEMENT (starting, stopping, handling child processes)
3616: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
3617: subscriptions, etc). These are described in two large
3618: sections below.
3619:
3620: B<PROCESS MANAGEMENT>
3621:
3622: Preforker - server who forks first. Runs as a daemon. HUPs.
3623: Uses IDEA encryption
3624:
3625: B<lond> forks off children processes that correspond to the other servers
3626: in the network. Management of these processes can be done at the
3627: parent process level or the child process level.
3628:
3629: B<logs/lond.log> is the location of log messages.
3630:
3631: The process management is now explained in terms of linux shell commands,
3632: subroutines internal to this code, and signal assignments:
3633:
3634: =over 4
3635:
3636: =item *
3637:
3638: PID is stored in B<logs/lond.pid>
3639:
3640: This is the process id number of the parent B<lond> process.
3641:
3642: =item *
3643:
3644: SIGTERM and SIGINT
3645:
3646: Parent signal assignment:
3647: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
3648:
3649: Child signal assignment:
3650: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
3651: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
3652: to restart a new child.)
3653:
3654: Command-line invocations:
3655: B<kill> B<-s> SIGTERM I<PID>
3656: B<kill> B<-s> SIGINT I<PID>
3657:
3658: Subroutine B<HUNTSMAN>:
3659: This is only invoked for the B<lond> parent I<PID>.
3660: This kills all the children, and then the parent.
3661: The B<lonc.pid> file is cleared.
3662:
3663: =item *
3664:
3665: SIGHUP
3666:
3667: Current bug:
3668: This signal can only be processed the first time
3669: on the parent process. Subsequent SIGHUP signals
3670: have no effect.
3671:
3672: Parent signal assignment:
3673: $SIG{HUP} = \&HUPSMAN;
3674:
3675: Child signal assignment:
3676: none (nothing happens)
3677:
3678: Command-line invocations:
3679: B<kill> B<-s> SIGHUP I<PID>
3680:
3681: Subroutine B<HUPSMAN>:
3682: This is only invoked for the B<lond> parent I<PID>,
3683: This kills all the children, and then the parent.
3684: The B<lond.pid> file is cleared.
3685:
3686: =item *
3687:
3688: SIGUSR1
3689:
3690: Parent signal assignment:
3691: $SIG{USR1} = \&USRMAN;
3692:
3693: Child signal assignment:
3694: $SIG{USR1}= \&logstatus;
3695:
3696: Command-line invocations:
3697: B<kill> B<-s> SIGUSR1 I<PID>
3698:
3699: Subroutine B<USRMAN>:
3700: When invoked for the B<lond> parent I<PID>,
3701: SIGUSR1 is sent to all the children, and the status of
3702: each connection is logged.
3703:
3704: =item *
3705:
3706: SIGUSR2
3707:
3708: Parent Signal assignment:
3709: $SIG{USR2} = \&UpdateHosts
3710:
3711: Child signal assignment:
3712: NONE
3713:
3714:
3715: =item *
3716:
3717: SIGCHLD
3718:
3719: Parent signal assignment:
3720: $SIG{CHLD} = \&REAPER;
3721:
3722: Child signal assignment:
3723: none
3724:
3725: Command-line invocations:
3726: B<kill> B<-s> SIGCHLD I<PID>
3727:
3728: Subroutine B<REAPER>:
3729: This is only invoked for the B<lond> parent I<PID>.
3730: Information pertaining to the child is removed.
3731: The socket port is cleaned up.
3732:
3733: =back
3734:
3735: B<SERVER-SIDE ACTIVITIES>
3736:
3737: Server-side information can be accepted in an encrypted or non-encrypted
3738: method.
3739:
3740: =over 4
3741:
3742: =item ping
3743:
3744: Query a client in the hosts.tab table; "Are you there?"
3745:
3746: =item pong
3747:
3748: Respond to a ping query.
3749:
3750: =item ekey
3751:
3752: Read in encrypted key, make cipher. Respond with a buildkey.
3753:
3754: =item load
3755:
3756: Respond with CPU load based on a computation upon /proc/loadavg.
3757:
3758: =item currentauth
3759:
3760: Reply with current authentication information (only over an
3761: encrypted channel).
3762:
3763: =item auth
3764:
3765: Only over an encrypted channel, reply as to whether a user's
3766: authentication information can be validated.
3767:
3768: =item passwd
3769:
3770: Allow for a password to be set.
3771:
3772: =item makeuser
3773:
3774: Make a user.
3775:
3776: =item passwd
3777:
3778: Allow for authentication mechanism and password to be changed.
3779:
3780: =item home
3781:
3782: Respond to a question "are you the home for a given user?"
3783:
3784: =item update
3785:
3786: Update contents of a subscribed resource.
3787:
3788: =item unsubscribe
3789:
3790: The server is unsubscribing from a resource.
3791:
3792: =item subscribe
3793:
3794: The server is subscribing to a resource.
3795:
3796: =item log
3797:
3798: Place in B<logs/lond.log>
3799:
3800: =item put
3801:
3802: stores hash in namespace
3803:
3804: =item rolesput
3805:
3806: put a role into a user's environment
3807:
3808: =item get
3809:
3810: returns hash with keys from array
3811: reference filled in from namespace
3812:
3813: =item eget
3814:
3815: returns hash with keys from array
3816: reference filled in from namesp (encrypts the return communication)
3817:
3818: =item rolesget
3819:
3820: get a role from a user's environment
3821:
3822: =item del
3823:
3824: deletes keys out of array from namespace
3825:
3826: =item keys
3827:
3828: returns namespace keys
3829:
3830: =item dump
3831:
3832: dumps the complete (or key matching regexp) namespace into a hash
3833:
3834: =item store
3835:
3836: stores hash permanently
3837: for this url; hashref needs to be given and should be a \%hashname; the
3838: remaining args aren't required and if they aren't passed or are '' they will
3839: be derived from the ENV
3840:
3841: =item restore
3842:
3843: returns a hash for a given url
3844:
3845: =item querysend
3846:
3847: Tells client about the lonsql process that has been launched in response
3848: to a sent query.
3849:
3850: =item queryreply
3851:
3852: Accept information from lonsql and make appropriate storage in temporary
3853: file space.
3854:
3855: =item idput
3856:
3857: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
3858: for each student, defined perhaps by the institutional Registrar.)
3859:
3860: =item idget
3861:
3862: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
3863: for each student, defined perhaps by the institutional Registrar.)
3864:
3865: =item tmpput
3866:
3867: Accept and store information in temporary space.
3868:
3869: =item tmpget
3870:
3871: Send along temporarily stored information.
3872:
3873: =item ls
3874:
3875: List part of a user's directory.
3876:
3877: =item pushtable
3878:
3879: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
3880: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
3881: must be restored manually in case of a problem with the new table file.
3882: pushtable requires that the request be encrypted and validated via
3883: ValidateManager. The form of the command is:
3884: enc:pushtable tablename <tablecontents> \n
3885: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
3886: cleartext newline.
3887:
3888: =item Hanging up (exit or init)
3889:
3890: What to do when a client tells the server that they (the client)
3891: are leaving the network.
3892:
3893: =item unknown command
3894:
3895: If B<lond> is sent an unknown command (not in the list above),
3896: it replys to the client "unknown_cmd".
3897:
3898:
3899: =item UNKNOWN CLIENT
3900:
3901: If the anti-spoofing algorithm cannot verify the client,
3902: the client is rejected (with a "refused" message sent
3903: to the client, and the connection is closed.
3904:
3905: =back
3906:
3907: =head1 PREREQUISITES
3908:
3909: IO::Socket
3910: IO::File
3911: Apache::File
3912: Symbol
3913: POSIX
3914: Crypt::IDEA
3915: LWP::UserAgent()
3916: GDBM_File
3917: Authen::Krb4
3918: Authen::Krb5
3919:
3920: =head1 COREQUISITES
3921:
3922: =head1 OSNAMES
3923:
3924: linux
3925:
3926: =head1 SCRIPT CATEGORIES
3927:
3928: Server/Process
3929:
3930: =cut
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