File:
[LON-CAPA] /
loncom /
lond
Revision
1.212:
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Tue Jul 27 10:25:07 2004 UTC (19 years, 9 months ago) by
foxr
Branches:
MAIN
CVS tags:
HEAD
Separate processing/request getting into subs get_request,
process_request. Plan: To further separate each operation into
a sub. If you are editing lond, and want to make life simpler
for everyone in the long run... take your request processing
section of the big long ugly if/else if chain in process_request
and sub it out.
1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.212 2004/07/27 10:25:07 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 = 0; # Non zero to enable debug log entries.
55:
56: my $status='';
57: my $lastlog='';
58:
59: my $VERSION='$Revision: 1.212 $'; #' 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: my $keymode;
73:
74: my $cipher; # Cipher key negotiated with client
75: my $tmpsnum = 0; # Id of tmpputs.
76:
77: #
78: # Connection type is:
79: # client - All client actions are allowed
80: # manager - only management functions allowed.
81: # both - Both management and client actions are allowed
82: #
83:
84: my $ConnectionType;
85:
86: my %hostid; # ID's for hosts in cluster by ip.
87: my %hostdom; # LonCAPA domain for hosts in cluster.
88: my %hostip; # IPs for hosts in cluster.
89: my %hostdns; # ID's of hosts looked up by DNS name.
90:
91: my %managers; # Ip -> manager names
92:
93: my %perlvar; # Will have the apache conf defined perl vars.
94:
95: #
96: # The hash below is used for command dispatching, and is therefore keyed on the request keyword.
97: # Each element of the hash contains a reference to an array that contains:
98: # A reference to a sub that executes the request corresponding to the keyword.
99: # A flag that is true if the request must be encoded to be acceptable.
100: # A mask with bits as follows:
101: # CLIENT_OK - Set when the function is allowed by ordinary clients
102: # MANAGER_OK - Set when the function is allowed to manager clients.
103: #
104: my $CLIENT_OK = 1;
105: my $MANAGER_OK = 2;
106: my %Dispatcher;
107:
108:
109: #
110: # The array below are password error strings."
111: #
112: my $lastpwderror = 13; # Largest error number from lcpasswd.
113: my @passwderrors = ("ok",
114: "lcpasswd must be run as user 'www'",
115: "lcpasswd got incorrect number of arguments",
116: "lcpasswd did not get the right nubmer of input text lines",
117: "lcpasswd too many simultaneous pwd changes in progress",
118: "lcpasswd User does not exist.",
119: "lcpasswd Incorrect current passwd",
120: "lcpasswd Unable to su to root.",
121: "lcpasswd Cannot set new passwd.",
122: "lcpasswd Username has invalid characters",
123: "lcpasswd Invalid characters in password",
124: "11", "12",
125: "lcpasswd Password mismatch");
126:
127:
128: # The array below are lcuseradd error strings.:
129:
130: my $lastadderror = 13;
131: my @adderrors = ("ok",
132: "User ID mismatch, lcuseradd must run as user www",
133: "lcuseradd Incorrect number of command line parameters must be 3",
134: "lcuseradd Incorrect number of stdinput lines, must be 3",
135: "lcuseradd Too many other simultaneous pwd changes in progress",
136: "lcuseradd User does not exist",
137: "lcuseradd Unable to make www member of users's group",
138: "lcuseradd Unable to su to root",
139: "lcuseradd Unable to set password",
140: "lcuseradd Usrname has invalid characters",
141: "lcuseradd Password has an invalid character",
142: "lcuseradd User already exists",
143: "lcuseradd Could not add user.",
144: "lcuseradd Password mismatch");
145:
146:
147:
148: #
149: # Statistics that are maintained and dislayed in the status line.
150: #
151: my $Transactions = 0; # Number of attempted transactions.
152: my $Failures = 0; # Number of transcations failed.
153:
154: # ResetStatistics:
155: # Resets the statistics counters:
156: #
157: sub ResetStatistics {
158: $Transactions = 0;
159: $Failures = 0;
160: }
161:
162:
163:
164: #------------------------------------------------------------------------
165: #
166: # LocalConnection
167: # Completes the formation of a locally authenticated connection.
168: # This function will ensure that the 'remote' client is really the
169: # local host. If not, the connection is closed, and the function fails.
170: # If so, initcmd is parsed for the name of a file containing the
171: # IDEA session key. The fie is opened, read, deleted and the session
172: # key returned to the caller.
173: #
174: # Parameters:
175: # $Socket - Socket open on client.
176: # $initcmd - The full text of the init command.
177: #
178: # Implicit inputs:
179: # $clientdns - The DNS name of the remote client.
180: # $thisserver - Our DNS name.
181: #
182: # Returns:
183: # IDEA session key on success.
184: # undef on failure.
185: #
186: sub LocalConnection {
187: my ($Socket, $initcmd) = @_;
188: Debug("Attempting local connection: $initcmd client: $clientdns me: $thisserver");
189: if($clientdns ne $thisserver) {
190: &logthis('<font color="red"> LocalConnection rejecting non local: '
191: ."$clientdns ne $thisserver </font>");
192: close $Socket;
193: return undef;
194: }
195: else {
196: chomp($initcmd); # Get rid of \n in filename.
197: my ($init, $type, $name) = split(/:/, $initcmd);
198: Debug(" Init command: $init $type $name ");
199:
200: # Require that $init = init, and $type = local: Otherwise
201: # the caller is insane:
202:
203: if(($init ne "init") && ($type ne "local")) {
204: &logthis('<font color = "red"> LocalConnection: caller is insane! '
205: ."init = $init, and type = $type </font>");
206: close($Socket);;
207: return undef;
208:
209: }
210: # Now get the key filename:
211:
212: my $IDEAKey = lonlocal::ReadKeyFile($name);
213: return $IDEAKey;
214: }
215: }
216: #------------------------------------------------------------------------------
217: #
218: # SSLConnection
219: # Completes the formation of an ssh authenticated connection. The
220: # socket is promoted to an ssl socket. If this promotion and the associated
221: # certificate exchange are successful, the IDEA key is generated and sent
222: # to the remote peer via the SSL tunnel. The IDEA key is also returned to
223: # the caller after the SSL tunnel is torn down.
224: #
225: # Parameters:
226: # Name Type Purpose
227: # $Socket IO::Socket::INET Plaintext socket.
228: #
229: # Returns:
230: # IDEA key on success.
231: # undef on failure.
232: #
233: sub SSLConnection {
234: my $Socket = shift;
235:
236: Debug("SSLConnection: ");
237: my $KeyFile = lonssl::KeyFile();
238: if(!$KeyFile) {
239: my $err = lonssl::LastError();
240: &logthis("<font color=\"red\"> CRITICAL"
241: ."Can't get key file $err </font>");
242: return undef;
243: }
244: my ($CACertificate,
245: $Certificate) = lonssl::CertificateFile();
246:
247:
248: # If any of the key, certificate or certificate authority
249: # certificate filenames are not defined, this can't work.
250:
251: if((!$Certificate) || (!$CACertificate)) {
252: my $err = lonssl::LastError();
253: &logthis("<font color=\"red\"> CRITICAL"
254: ."Can't get certificates: $err </font>");
255:
256: return undef;
257: }
258: Debug("Key: $KeyFile CA: $CACertificate Cert: $Certificate");
259:
260: # Indicate to our peer that we can procede with
261: # a transition to ssl authentication:
262:
263: print $Socket "ok:ssl\n";
264:
265: Debug("Approving promotion -> ssl");
266: # And do so:
267:
268: my $SSLSocket = lonssl::PromoteServerSocket($Socket,
269: $CACertificate,
270: $Certificate,
271: $KeyFile);
272: if(! ($SSLSocket) ) { # SSL socket promotion failed.
273: my $err = lonssl::LastError();
274: &logthis("<font color=\"red\"> CRITICAL "
275: ."SSL Socket promotion failed: $err </font>");
276: return undef;
277: }
278: Debug("SSL Promotion successful");
279:
280: #
281: # The only thing we'll use the socket for is to send the IDEA key
282: # to the peer:
283:
284: my $Key = lonlocal::CreateCipherKey();
285: print $SSLSocket "$Key\n";
286:
287: lonssl::Close($SSLSocket);
288:
289: Debug("Key exchange complete: $Key");
290:
291: return $Key;
292: }
293: #
294: # InsecureConnection:
295: # If insecure connections are allowd,
296: # exchange a challenge with the client to 'validate' the
297: # client (not really, but that's the protocol):
298: # We produce a challenge string that's sent to the client.
299: # The client must then echo the challenge verbatim to us.
300: #
301: # Parameter:
302: # Socket - Socket open on the client.
303: # Returns:
304: # 1 - success.
305: # 0 - failure (e.g.mismatch or insecure not allowed).
306: #
307: sub InsecureConnection {
308: my $Socket = shift;
309:
310: # Don't even start if insecure connections are not allowed.
311:
312: if(! $perlvar{londAllowInsecure}) { # Insecure connections not allowed.
313: return 0;
314: }
315:
316: # Fabricate a challenge string and send it..
317:
318: my $challenge = "$$".time; # pid + time.
319: print $Socket "$challenge\n";
320: &status("Waiting for challenge reply");
321:
322: my $answer = <$Socket>;
323: $answer =~s/\W//g;
324: if($challenge eq $answer) {
325: return 1;
326: }
327: else {
328: logthis("<font color='blue'>WARNING client did not respond to challenge</font>");
329: &status("No challenge reqply");
330: return 0;
331: }
332:
333:
334: }
335:
336: #
337: # GetCertificate: Given a transaction that requires a certificate,
338: # this function will extract the certificate from the transaction
339: # request. Note that at this point, the only concept of a certificate
340: # is the hostname to which we are connected.
341: #
342: # Parameter:
343: # request - The request sent by our client (this parameterization may
344: # need to change when we really use a certificate granting
345: # authority.
346: #
347: sub GetCertificate {
348: my $request = shift;
349:
350: return $clientip;
351: }
352:
353: #
354: # Return true if client is a manager.
355: #
356: sub isManager {
357: return (($ConnectionType eq "manager") || ($ConnectionType eq "both"));
358: }
359: #
360: # Return tru if client can do client functions
361: #
362: sub isClient {
363: return (($ConnectionType eq "client") || ($ConnectionType eq "both"));
364: }
365:
366:
367: #
368: # ReadManagerTable: Reads in the current manager table. For now this is
369: # done on each manager authentication because:
370: # - These authentications are not frequent
371: # - This allows dynamic changes to the manager table
372: # without the need to signal to the lond.
373: #
374:
375: sub ReadManagerTable {
376:
377: # Clean out the old table first..
378:
379: foreach my $key (keys %managers) {
380: delete $managers{$key};
381: }
382:
383: my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
384: if (!open (MANAGERS, $tablename)) {
385: logthis('<font color="red">No manager table. Nobody can manage!!</font>');
386: return;
387: }
388: while(my $host = <MANAGERS>) {
389: chomp($host);
390: if ($host =~ "^#") { # Comment line.
391: next;
392: }
393: if (!defined $hostip{$host}) { # This is a non cluster member
394: # The entry is of the form:
395: # cluname:hostname
396: # cluname - A 'cluster hostname' is needed in order to negotiate
397: # the host key.
398: # hostname- The dns name of the host.
399: #
400: my($cluname, $dnsname) = split(/:/, $host);
401:
402: my $ip = gethostbyname($dnsname);
403: if(defined($ip)) { # bad names don't deserve entry.
404: my $hostip = inet_ntoa($ip);
405: $managers{$hostip} = $cluname;
406: logthis('<font color="green"> registering manager '.
407: "$dnsname as $cluname with $hostip </font>\n");
408: }
409: } else {
410: logthis('<font color="green"> existing host'." $host</font>\n");
411: $managers{$hostip{$host}} = $host; # Use info from cluster tab if clumemeber
412: }
413: }
414: }
415:
416: #
417: # ValidManager: Determines if a given certificate represents a valid manager.
418: # in this primitive implementation, the 'certificate' is
419: # just the connecting loncapa client name. This is checked
420: # against a valid client list in the configuration.
421: #
422: #
423: sub ValidManager {
424: my $certificate = shift;
425:
426: return isManager;
427: }
428: #
429: # CopyFile: Called as part of the process of installing a
430: # new configuration file. This function copies an existing
431: # file to a backup file.
432: # Parameters:
433: # oldfile - Name of the file to backup.
434: # newfile - Name of the backup file.
435: # Return:
436: # 0 - Failure (errno has failure reason).
437: # 1 - Success.
438: #
439: sub CopyFile {
440:
441: my ($oldfile, $newfile) = @_;
442:
443: # The file must exist:
444:
445: if(-e $oldfile) {
446:
447: # Read the old file.
448:
449: my $oldfh = IO::File->new("< $oldfile");
450: if(!$oldfh) {
451: return 0;
452: }
453: my @contents = <$oldfh>; # Suck in the entire file.
454:
455: # write the backup file:
456:
457: my $newfh = IO::File->new("> $newfile");
458: if(!(defined $newfh)){
459: return 0;
460: }
461: my $lines = scalar @contents;
462: for (my $i =0; $i < $lines; $i++) {
463: print $newfh ($contents[$i]);
464: }
465:
466: $oldfh->close;
467: $newfh->close;
468:
469: chmod(0660, $newfile);
470:
471: return 1;
472:
473: } else {
474: return 0;
475: }
476: }
477: #
478: # Host files are passed out with externally visible host IPs.
479: # If, for example, we are behind a fire-wall or NAT host, our
480: # internally visible IP may be different than the externally
481: # visible IP. Therefore, we always adjust the contents of the
482: # host file so that the entry for ME is the IP that we believe
483: # we have. At present, this is defined as the entry that
484: # DNS has for us. If by some chance we are not able to get a
485: # DNS translation for us, then we assume that the host.tab file
486: # is correct.
487: # BUGBUGBUG - in the future, we really should see if we can
488: # easily query the interface(s) instead.
489: # Parameter(s):
490: # contents - The contents of the host.tab to check.
491: # Returns:
492: # newcontents - The adjusted contents.
493: #
494: #
495: sub AdjustHostContents {
496: my $contents = shift;
497: my $adjusted;
498: my $me = $perlvar{'lonHostID'};
499:
500: foreach my $line (split(/\n/,$contents)) {
501: if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/))) {
502: chomp($line);
503: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
504: if ($id eq $me) {
505: my $ip = gethostbyname($name);
506: my $ipnew = inet_ntoa($ip);
507: $ip = $ipnew;
508: # Reconstruct the host line and append to adjusted:
509:
510: my $newline = "$id:$domain:$role:$name:$ip";
511: if($maxcon ne "") { # Not all hosts have loncnew tuning params
512: $newline .= ":$maxcon:$idleto:$mincon";
513: }
514: $adjusted .= $newline."\n";
515:
516: } else { # Not me, pass unmodified.
517: $adjusted .= $line."\n";
518: }
519: } else { # Blank or comment never re-written.
520: $adjusted .= $line."\n"; # Pass blanks and comments as is.
521: }
522: }
523: return $adjusted;
524: }
525: #
526: # InstallFile: Called to install an administrative file:
527: # - The file is created with <name>.tmp
528: # - The <name>.tmp file is then mv'd to <name>
529: # This lugubrious procedure is done to ensure that we are never without
530: # a valid, even if dated, version of the file regardless of who crashes
531: # and when the crash occurs.
532: #
533: # Parameters:
534: # Name of the file
535: # File Contents.
536: # Return:
537: # nonzero - success.
538: # 0 - failure and $! has an errno.
539: #
540: sub InstallFile {
541:
542: my ($Filename, $Contents) = @_;
543: my $TempFile = $Filename.".tmp";
544:
545: # Open the file for write:
546:
547: my $fh = IO::File->new("> $TempFile"); # Write to temp.
548: if(!(defined $fh)) {
549: &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
550: return 0;
551: }
552: # write the contents of the file:
553:
554: print $fh ($Contents);
555: $fh->close; # In case we ever have a filesystem w. locking
556:
557: chmod(0660, $TempFile);
558:
559: # Now we can move install the file in position.
560:
561: move($TempFile, $Filename);
562:
563: return 1;
564: }
565:
566:
567: #
568: # ConfigFileFromSelector: converts a configuration file selector
569: # (one of host or domain at this point) into a
570: # configuration file pathname.
571: #
572: # Parameters:
573: # selector - Configuration file selector.
574: # Returns:
575: # Full path to the file or undef if the selector is invalid.
576: #
577: sub ConfigFileFromSelector {
578: my $selector = shift;
579: my $tablefile;
580:
581: my $tabledir = $perlvar{'lonTabDir'}.'/';
582: if ($selector eq "hosts") {
583: $tablefile = $tabledir."hosts.tab";
584: } elsif ($selector eq "domain") {
585: $tablefile = $tabledir."domain.tab";
586: } else {
587: return undef;
588: }
589: return $tablefile;
590:
591: }
592: #
593: # PushFile: Called to do an administrative push of a file.
594: # - Ensure the file being pushed is one we support.
595: # - Backup the old file to <filename.saved>
596: # - Separate the contents of the new file out from the
597: # rest of the request.
598: # - Write the new file.
599: # Parameter:
600: # Request - The entire user request. This consists of a : separated
601: # string pushfile:tablename:contents.
602: # NOTE: The contents may have :'s in it as well making things a bit
603: # more interesting... but not much.
604: # Returns:
605: # String to send to client ("ok" or "refused" if bad file).
606: #
607: sub PushFile {
608: my $request = shift;
609: my ($command, $filename, $contents) = split(":", $request, 3);
610:
611: # At this point in time, pushes for only the following tables are
612: # supported:
613: # hosts.tab ($filename eq host).
614: # domain.tab ($filename eq domain).
615: # Construct the destination filename or reject the request.
616: #
617: # lonManage is supposed to ensure this, however this session could be
618: # part of some elaborate spoof that managed somehow to authenticate.
619: #
620:
621:
622: my $tablefile = ConfigFileFromSelector($filename);
623: if(! (defined $tablefile)) {
624: return "refused";
625: }
626: #
627: # >copy< the old table to the backup table
628: # don't rename in case system crashes/reboots etc. in the time
629: # window between a rename and write.
630: #
631: my $backupfile = $tablefile;
632: $backupfile =~ s/\.tab$/.old/;
633: if(!CopyFile($tablefile, $backupfile)) {
634: &logthis('<font color="green"> CopyFile from '.$tablefile." to ".$backupfile." failed </font>");
635: return "error:$!";
636: }
637: &logthis('<font color="green"> Pushfile: backed up '
638: .$tablefile." to $backupfile</font>");
639:
640: # If the file being pushed is the host file, we adjust the entry for ourself so that the
641: # IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible
642: # to conceive of conditions where we don't have a DNS entry locally. This is possible in a
643: # network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
644: # that possibilty.
645:
646: if($filename eq "host") {
647: $contents = AdjustHostContents($contents);
648: }
649:
650: # Install the new file:
651:
652: if(!InstallFile($tablefile, $contents)) {
653: &logthis('<font color="red"> Pushfile: unable to install '
654: .$tablefile." $! </font>");
655: return "error:$!";
656: }
657: else {
658: &logthis('<font color="green"> Installed new '.$tablefile
659: ."</font>");
660:
661: }
662:
663:
664: # Indicate success:
665:
666: return "ok";
667:
668: }
669:
670: #
671: # Called to re-init either lonc or lond.
672: #
673: # Parameters:
674: # request - The full request by the client. This is of the form
675: # reinit:<process>
676: # where <process> is allowed to be either of
677: # lonc or lond
678: #
679: # Returns:
680: # The string to be sent back to the client either:
681: # ok - Everything worked just fine.
682: # error:why - There was a failure and why describes the reason.
683: #
684: #
685: sub ReinitProcess {
686: my $request = shift;
687:
688:
689: # separate the request (reinit) from the process identifier and
690: # validate it producing the name of the .pid file for the process.
691: #
692: #
693: my ($junk, $process) = split(":", $request);
694: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
695: if($process eq 'lonc') {
696: $processpidfile = $processpidfile."lonc.pid";
697: if (!open(PIDFILE, "< $processpidfile")) {
698: return "error:Open failed for $processpidfile";
699: }
700: my $loncpid = <PIDFILE>;
701: close(PIDFILE);
702: logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
703: ."</font>");
704: kill("USR2", $loncpid);
705: } elsif ($process eq 'lond') {
706: logthis('<font color="red"> Reinitializing self (lond) </font>');
707: &UpdateHosts; # Lond is us!!
708: } else {
709: &logthis('<font color="yellow" Invalid reinit request for '.$process
710: ."</font>");
711: return "error:Invalid process identifier $process";
712: }
713: return 'ok';
714: }
715: # Validate a line in a configuration file edit script:
716: # Validation includes:
717: # - Ensuring the command is valid.
718: # - Ensuring the command has sufficient parameters
719: # Parameters:
720: # scriptline - A line to validate (\n has been stripped for what it's worth).
721: #
722: # Return:
723: # 0 - Invalid scriptline.
724: # 1 - Valid scriptline
725: # NOTE:
726: # Only the command syntax is checked, not the executability of the
727: # command.
728: #
729: sub isValidEditCommand {
730: my $scriptline = shift;
731:
732: # Line elements are pipe separated:
733:
734: my ($command, $key, $newline) = split(/\|/, $scriptline);
735: &logthis('<font color="green"> isValideditCommand checking: '.
736: "Command = '$command', Key = '$key', Newline = '$newline' </font>\n");
737:
738: if ($command eq "delete") {
739: #
740: # key with no newline.
741: #
742: if( ($key eq "") || ($newline ne "")) {
743: return 0; # Must have key but no newline.
744: } else {
745: return 1; # Valid syntax.
746: }
747: } elsif ($command eq "replace") {
748: #
749: # key and newline:
750: #
751: if (($key eq "") || ($newline eq "")) {
752: return 0;
753: } else {
754: return 1;
755: }
756: } elsif ($command eq "append") {
757: if (($key ne "") && ($newline eq "")) {
758: return 1;
759: } else {
760: return 0;
761: }
762: } else {
763: return 0; # Invalid command.
764: }
765: return 0; # Should not get here!!!
766: }
767: #
768: # ApplyEdit - Applies an edit command to a line in a configuration
769: # file. It is the caller's responsiblity to validate the
770: # edit line.
771: # Parameters:
772: # $directive - A single edit directive to apply.
773: # Edit directives are of the form:
774: # append|newline - Appends a new line to the file.
775: # replace|key|newline - Replaces the line with key value 'key'
776: # delete|key - Deletes the line with key value 'key'.
777: # $editor - A config file editor object that contains the
778: # file being edited.
779: #
780: sub ApplyEdit {
781:
782: my ($directive, $editor) = @_;
783:
784: # Break the directive down into its command and its parameters
785: # (at most two at this point. The meaning of the parameters, if in fact
786: # they exist depends on the command).
787:
788: my ($command, $p1, $p2) = split(/\|/, $directive);
789:
790: if($command eq "append") {
791: $editor->Append($p1); # p1 - key p2 null.
792: } elsif ($command eq "replace") {
793: $editor->ReplaceLine($p1, $p2); # p1 - key p2 = newline.
794: } elsif ($command eq "delete") {
795: $editor->DeleteLine($p1); # p1 - key p2 null.
796: } else { # Should not get here!!!
797: die "Invalid command given to ApplyEdit $command"
798: }
799: }
800: #
801: # AdjustOurHost:
802: # Adjusts a host file stored in a configuration file editor object
803: # for the true IP address of this host. This is necessary for hosts
804: # that live behind a firewall.
805: # Those hosts have a publicly distributed IP of the firewall, but
806: # internally must use their actual IP. We assume that a given
807: # host only has a single IP interface for now.
808: # Formal Parameters:
809: # editor - The configuration file editor to adjust. This
810: # editor is assumed to contain a hosts.tab file.
811: # Strategy:
812: # - Figure out our hostname.
813: # - Lookup the entry for this host.
814: # - Modify the line to contain our IP
815: # - Do a replace for this host.
816: sub AdjustOurHost {
817: my $editor = shift;
818:
819: # figure out who I am.
820:
821: my $myHostName = $perlvar{'lonHostID'}; # LonCAPA hostname.
822:
823: # Get my host file entry.
824:
825: my $ConfigLine = $editor->Find($myHostName);
826: if(! (defined $ConfigLine)) {
827: die "AdjustOurHost - no entry for me in hosts file $myHostName";
828: }
829: # figure out my IP:
830: # Use the config line to get my hostname.
831: # Use gethostbyname to translate that into an IP address.
832: #
833: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);
834: my $BinaryIp = gethostbyname($name);
835: my $ip = inet_ntoa($ip);
836: #
837: # Reassemble the config line from the elements in the list.
838: # Note that if the loncnew items were not present before, they will
839: # be now even if they would be empty
840: #
841: my $newConfigLine = $id;
842: foreach my $item ($domain, $role, $name, $ip, $maxcon, $idleto, $mincon) {
843: $newConfigLine .= ":".$item;
844: }
845: # Replace the line:
846:
847: $editor->ReplaceLine($id, $newConfigLine);
848:
849: }
850: #
851: # ReplaceConfigFile:
852: # Replaces a configuration file with the contents of a
853: # configuration file editor object.
854: # This is done by:
855: # - Copying the target file to <filename>.old
856: # - Writing the new file to <filename>.tmp
857: # - Moving <filename.tmp> -> <filename>
858: # This laborious process ensures that the system is never without
859: # a configuration file that's at least valid (even if the contents
860: # may be dated).
861: # Parameters:
862: # filename - Name of the file to modify... this is a full path.
863: # editor - Editor containing the file.
864: #
865: sub ReplaceConfigFile {
866:
867: my ($filename, $editor) = @_;
868:
869: CopyFile ($filename, $filename.".old");
870:
871: my $contents = $editor->Get(); # Get the contents of the file.
872:
873: InstallFile($filename, $contents);
874: }
875: #
876: #
877: # Called to edit a configuration table file
878: # Parameters:
879: # request - The entire command/request sent by lonc or lonManage
880: # Return:
881: # The reply to send to the client.
882: #
883: sub EditFile {
884: my $request = shift;
885:
886: # Split the command into it's pieces: edit:filetype:script
887:
888: my ($request, $filetype, $script) = split(/:/, $request,3); # : in script
889:
890: # Check the pre-coditions for success:
891:
892: if($request != "edit") { # Something is amiss afoot alack.
893: return "error:edit request detected, but request != 'edit'\n";
894: }
895: if( ($filetype ne "hosts") &&
896: ($filetype ne "domain")) {
897: return "error:edit requested with invalid file specifier: $filetype \n";
898: }
899:
900: # Split the edit script and check it's validity.
901:
902: my @scriptlines = split(/\n/, $script); # one line per element.
903: my $linecount = scalar(@scriptlines);
904: for(my $i = 0; $i < $linecount; $i++) {
905: chomp($scriptlines[$i]);
906: if(!isValidEditCommand($scriptlines[$i])) {
907: return "error:edit with bad script line: '$scriptlines[$i]' \n";
908: }
909: }
910:
911: # Execute the edit operation.
912: # - Create a config file editor for the appropriate file and
913: # - execute each command in the script:
914: #
915: my $configfile = ConfigFileFromSelector($filetype);
916: if (!(defined $configfile)) {
917: return "refused\n";
918: }
919: my $editor = ConfigFileEdit->new($configfile);
920:
921: for (my $i = 0; $i < $linecount; $i++) {
922: ApplyEdit($scriptlines[$i], $editor);
923: }
924: # If the file is the host file, ensure that our host is
925: # adjusted to have our ip:
926: #
927: if($filetype eq "host") {
928: AdjustOurHost($editor);
929: }
930: # Finally replace the current file with our file.
931: #
932: ReplaceConfigFile($configfile, $editor);
933:
934: return "ok\n";
935: }
936:
937: #---------------------------------------------------------------
938: #
939: # Manipulation of hash based databases (factoring out common code
940: # for later use as we refactor.
941: #
942: # Ties a domain level resource file to a hash.
943: # If requested a history entry is created in the associated hist file.
944: #
945: # Parameters:
946: # domain - Name of the domain in which the resource file lives.
947: # namespace - Name of the hash within that domain.
948: # how - How to tie the hash (e.g. GDBM_WRCREAT()).
949: # loghead - Optional parameter, if present a log entry is created
950: # in the associated history file and this is the first part
951: # of that entry.
952: # logtail - Goes along with loghead, The actual logentry is of the
953: # form $loghead:<timestamp>:logtail.
954: # Returns:
955: # Reference to a hash bound to the db file or alternatively undef
956: # if the tie failed.
957: #
958: sub tie_domain_hash {
959: my ($domain,$namespace,$how,$loghead,$logtail) = @_;
960:
961: # Filter out any whitespace in the domain name:
962:
963: $domain =~ s/\W//g;
964:
965: # We have enough to go on to tie the hash:
966:
967: my $user_top_dir = $perlvar{'lonUsersDir'};
968: my $domain_dir = $user_top_dir."/$domain";
969: my $resource_file = $domain_dir."/$namespace.db";
970: my %hash;
971: if(tie(%hash, 'GDBM_File', $resource_file, $how, 0640)) {
972: if (defined($loghead)) { # Need to log the operation.
973: my $logFh = IO::File->new(">>$domain_dir/$namespace.hist");
974: if($logFh) {
975: my $timestamp = time;
976: print $logFh "$loghead:$timestamp:$logtail\n";
977: }
978: $logFh->close;
979: }
980: return \%hash; # Return the tied hash.
981: } else {
982: return undef; # Tie failed.
983: }
984: }
985:
986: #
987: # Ties a user's resource file to a hash.
988: # If necessary, an appropriate history
989: # log file entry is made as well.
990: # This sub factors out common code from the subs that manipulate
991: # the various gdbm files that keep keyword value pairs.
992: # Parameters:
993: # domain - Name of the domain the user is in.
994: # user - Name of the 'current user'.
995: # namespace - Namespace representing the file to tie.
996: # how - What the tie is done to (e.g. GDBM_WRCREAT().
997: # loghead - Optional first part of log entry if there may be a
998: # history file.
999: # what - Optional tail of log entry if there may be a history
1000: # file.
1001: # Returns:
1002: # hash to which the database is tied. It's up to the caller to untie.
1003: # undef if the has could not be tied.
1004: #
1005: sub tie_user_hash {
1006: my ($domain,$user,$namespace,$how,$loghead,$what) = @_;
1007:
1008: $namespace=~s/\//\_/g; # / -> _
1009: $namespace=~s/\W//g; # whitespace eliminated.
1010: my $proname = propath($domain, $user);
1011:
1012: # Tie the database.
1013:
1014: my %hash;
1015: if(tie(%hash, 'GDBM_File', "$proname/$namespace.db",
1016: $how, 0640)) {
1017: # If this is a namespace for which a history is kept,
1018: # make the history log entry:
1019: if (($namespace =~/^nohist\_/) && (defined($loghead))) {
1020: my $args = scalar @_;
1021: Debug(" Opening history: $namespace $args");
1022: my $hfh = IO::File->new(">>$proname/$namespace.hist");
1023: if($hfh) {
1024: my $now = time;
1025: print $hfh "$loghead:$now:$what\n";
1026: }
1027: $hfh->close;
1028: }
1029: return \%hash;
1030: } else {
1031: return undef;
1032: }
1033:
1034: }
1035: #---------------------------------------------------------------
1036: #
1037: # Getting, decoding and dispatching requests:
1038: #
1039:
1040: #
1041: # Get a Request:
1042: # Gets a Request message from the client. The transaction
1043: # is defined as a 'line' of text. We remove the new line
1044: # from the text line.
1045: #
1046: sub get_request {
1047: my $input = <$client>;
1048: chomp($input);
1049:
1050: Debug("get_request: Request = $input\n");
1051:
1052: &status('Processing '.$clientname.':'.$input);
1053:
1054: return $input;
1055: }
1056: #---------------------------------------------------------------
1057: #
1058: # Process a request. This sub should shrink as each action
1059: # gets farmed out into a separat sub that is registered
1060: # with the dispatch hash.
1061: #
1062: # Parameters:
1063: # user_input - The request received from the client (lonc).
1064: # Returns:
1065: # true to keep processing, false if caller should exit.
1066: #
1067: sub process_request {
1068: my ($userinput) = @_; # Easier for now to break style than to
1069: # fix all the userinput -> user_input.
1070: my $wasenc = 0; # True if request was encrypted.
1071: # ------------------------------------------------------------ See if encrypted
1072: if ($userinput =~ /^enc/) {
1073: $userinput = decipher($userinput);
1074: $wasenc=1;
1075: if(!$userinput) { # Cipher not defined.
1076: &Failure($client, "error: Encrypted data without negotated key");
1077: return 0;
1078: }
1079: }
1080: Debug("process_request: $userinput\n");
1081:
1082: # ------------------------------------------------------------- Normal commands
1083: # ------------------------------------------------------------------------ ping
1084: if ($userinput =~ /^ping/) { # client only
1085: if(isClient) {
1086: print $client "$currenthostid\n";
1087: } else {
1088: Reply($client, "refused\n", $userinput);
1089: }
1090: # ------------------------------------------------------------------------ pong
1091: }elsif ($userinput =~ /^pong/) { # client only
1092: if(isClient) {
1093: my $reply=&reply("ping",$clientname);
1094: print $client "$currenthostid:$reply\n";
1095: } else {
1096: Reply($client, "refused\n", $userinput);
1097: }
1098: # ------------------------------------------------------------------------ ekey
1099: } elsif ($userinput =~ /^ekey/) { # ok for both clients & mgrs
1100: my $buildkey=time.$$.int(rand 100000);
1101: $buildkey=~tr/1-6/A-F/;
1102: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
1103: my $key=$currenthostid.$clientname;
1104: $key=~tr/a-z/A-Z/;
1105: $key=~tr/G-P/0-9/;
1106: $key=~tr/Q-Z/0-9/;
1107: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
1108: $key=substr($key,0,32);
1109: my $cipherkey=pack("H32",$key);
1110: $cipher=new IDEA $cipherkey;
1111: print $client "$buildkey\n";
1112: # ------------------------------------------------------------------------ load
1113: } elsif ($userinput =~ /^load/) { # client only
1114: if (isClient) {
1115: my $loadavg;
1116: {
1117: my $loadfile=IO::File->new('/proc/loadavg');
1118: $loadavg=<$loadfile>;
1119: }
1120: $loadavg =~ s/\s.*//g;
1121: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1122: print $client "$loadpercent\n";
1123: } else {
1124: Reply($client, "refused\n", $userinput);
1125:
1126: }
1127: # -------------------------------------------------------------------- userload
1128: } elsif ($userinput =~ /^userload/) { # client only
1129: if(isClient) {
1130: my $userloadpercent=&userload();
1131: print $client "$userloadpercent\n";
1132: } else {
1133: Reply($client, "refused\n", $userinput);
1134:
1135: }
1136: #
1137: # Transactions requiring encryption:
1138: #
1139: # ----------------------------------------------------------------- currentauth
1140: } elsif ($userinput =~ /^currentauth/) {
1141: if (($wasenc==1) && isClient) { # Encoded & client only.
1142: my ($cmd,$udom,$uname)=split(/:/,$userinput);
1143: my $result = GetAuthType($udom, $uname);
1144: if($result eq "nouser") {
1145: print $client "unknown_user\n";
1146: }
1147: else {
1148: print $client "$result\n";
1149: }
1150: } else {
1151: Reply($client, "refused\n", $userinput);
1152:
1153: }
1154: #--------------------------------------------------------------------- pushfile
1155: } elsif($userinput =~ /^pushfile/) { # encoded & manager.
1156: if(($wasenc == 1) && isManager) {
1157: my $cert = GetCertificate($userinput);
1158: if(ValidManager($cert)) {
1159: my $reply = PushFile($userinput);
1160: print $client "$reply\n";
1161: } else {
1162: print $client "refused\n";
1163: }
1164: } else {
1165: Reply($client, "refused\n", $userinput);
1166:
1167: }
1168: #--------------------------------------------------------------------- reinit
1169: } elsif($userinput =~ /^reinit/) { # Encoded and manager
1170: if (($wasenc == 1) && isManager) {
1171: my $cert = GetCertificate($userinput);
1172: if(ValidManager($cert)) {
1173: chomp($userinput);
1174: my $reply = ReinitProcess($userinput);
1175: print $client "$reply\n";
1176: } else {
1177: print $client "refused\n";
1178: }
1179: } else {
1180: Reply($client, "refused\n", $userinput);
1181: }
1182: #------------------------------------------------------------------------- edit
1183: } elsif ($userinput =~ /^edit/) { # encoded and manager:
1184: if(($wasenc ==1) && (isManager)) {
1185: my $cert = GetCertificate($userinput);
1186: if(ValidManager($cert)) {
1187: my($command, $filetype, $script) = split(/:/, $userinput);
1188: if (($filetype eq "hosts") || ($filetype eq "domain")) {
1189: if($script ne "") {
1190: Reply($client, EditFile($userinput));
1191: } else {
1192: Reply($client,"refused\n",$userinput);
1193: }
1194: } else {
1195: Reply($client,"refused\n",$userinput);
1196: }
1197: } else {
1198: Reply($client,"refused\n",$userinput);
1199: }
1200: } else {
1201: Reply($client,"refused\n",$userinput);
1202: }
1203: # ------------------------------------------------------------------------ auth
1204: } elsif ($userinput =~ /^auth/) { # Encoded and client only.
1205: if (($wasenc==1) && isClient) {
1206: my ($cmd,$udom,$uname,$upass)=split(/:/,$userinput);
1207: chomp($upass);
1208: $upass=unescape($upass);
1209: my $proname=propath($udom,$uname);
1210: my $passfilename="$proname/passwd";
1211: if (-e $passfilename) {
1212: my $pf = IO::File->new($passfilename);
1213: my $realpasswd=<$pf>;
1214: chomp($realpasswd);
1215: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1216: my $pwdcorrect=0;
1217: if ($howpwd eq 'internal') {
1218: &Debug("Internal auth");
1219: $pwdcorrect=
1220: (crypt($upass,$contentpwd) eq $contentpwd);
1221: } elsif ($howpwd eq 'unix') {
1222: &Debug("Unix auth");
1223: if((getpwnam($uname))[1] eq "") { #no such user!
1224: $pwdcorrect = 0;
1225: } else {
1226: $contentpwd=(getpwnam($uname))[1];
1227: my $pwauth_path="/usr/local/sbin/pwauth";
1228: unless ($contentpwd eq 'x') {
1229: $pwdcorrect=
1230: (crypt($upass,$contentpwd) eq
1231: $contentpwd);
1232: }
1233:
1234: elsif (-e $pwauth_path) {
1235: open PWAUTH, "|$pwauth_path" or
1236: die "Cannot invoke authentication";
1237: print PWAUTH "$uname\n$upass\n";
1238: close PWAUTH;
1239: $pwdcorrect=!$?;
1240: }
1241: }
1242: } elsif ($howpwd eq 'krb4') {
1243: my $null=pack("C",0);
1244: unless ($upass=~/$null/) {
1245: my $krb4_error = &Authen::Krb4::get_pw_in_tkt
1246: ($uname,"",$contentpwd,'krbtgt',
1247: $contentpwd,1,$upass);
1248: if (!$krb4_error) {
1249: $pwdcorrect = 1;
1250: } else {
1251: $pwdcorrect=0;
1252: # log error if it is not a bad password
1253: if ($krb4_error != 62) {
1254: &logthis('krb4:'.$uname.','.
1255: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
1256: }
1257: }
1258: }
1259: } elsif ($howpwd eq 'krb5') {
1260: my $null=pack("C",0);
1261: unless ($upass=~/$null/) {
1262: my $krbclient=&Authen::Krb5::parse_name($uname.'@'.$contentpwd);
1263: my $krbservice="krbtgt/".$contentpwd."\@".$contentpwd;
1264: my $krbserver=&Authen::Krb5::parse_name($krbservice);
1265: my $credentials=&Authen::Krb5::cc_default();
1266: $credentials->initialize($krbclient);
1267: my $krbreturn =
1268: &Authen::Krb5::get_in_tkt_with_password(
1269: $krbclient,$krbserver,$upass,$credentials);
1270: # unless ($krbreturn) {
1271: # &logthis("Krb5 Error: ".
1272: # &Authen::Krb5::error());
1273: # }
1274: $pwdcorrect = ($krbreturn == 1);
1275: } else { $pwdcorrect=0; }
1276: } elsif ($howpwd eq 'localauth') {
1277: $pwdcorrect=&localauth::localauth($uname,$upass,
1278: $contentpwd);
1279: }
1280: if ($pwdcorrect) {
1281: print $client "authorized\n";
1282: } else {
1283: print $client "non_authorized\n";
1284: }
1285: } else {
1286: print $client "unknown_user\n";
1287: }
1288: } else {
1289: Reply($client, "refused\n", $userinput);
1290:
1291: }
1292: # ---------------------------------------------------------------------- passwd
1293: } elsif ($userinput =~ /^passwd/) { # encoded and client
1294: if (($wasenc==1) && isClient) {
1295: my
1296: ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
1297: chomp($npass);
1298: $upass=&unescape($upass);
1299: $npass=&unescape($npass);
1300: &Debug("Trying to change password for $uname");
1301: my $proname=propath($udom,$uname);
1302: my $passfilename="$proname/passwd";
1303: if (-e $passfilename) {
1304: my $realpasswd;
1305: { my $pf = IO::File->new($passfilename);
1306: $realpasswd=<$pf>; }
1307: chomp($realpasswd);
1308: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1309: if ($howpwd eq 'internal') {
1310: &Debug("internal auth");
1311: if (crypt($upass,$contentpwd) eq $contentpwd) {
1312: my $salt=time;
1313: $salt=substr($salt,6,2);
1314: my $ncpass=crypt($npass,$salt);
1315: {
1316: my $pf;
1317: if ($pf = IO::File->new(">$passfilename")) {
1318: print $pf "internal:$ncpass\n";
1319: &logthis("Result of password change for $uname: pwchange_success");
1320: print $client "ok\n";
1321: } else {
1322: &logthis("Unable to open $uname passwd to change password");
1323: print $client "non_authorized\n";
1324: }
1325: }
1326:
1327: } else {
1328: print $client "non_authorized\n";
1329: }
1330: } elsif ($howpwd eq 'unix') {
1331: # Unix means we have to access /etc/password
1332: # one way or another.
1333: # First: Make sure the current password is
1334: # correct
1335: &Debug("auth is unix");
1336: $contentpwd=(getpwnam($uname))[1];
1337: my $pwdcorrect = "0";
1338: my $pwauth_path="/usr/local/sbin/pwauth";
1339: unless ($contentpwd eq 'x') {
1340: $pwdcorrect=
1341: (crypt($upass,$contentpwd) eq $contentpwd);
1342: } elsif (-e $pwauth_path) {
1343: open PWAUTH, "|$pwauth_path" or
1344: die "Cannot invoke authentication";
1345: print PWAUTH "$uname\n$upass\n";
1346: close PWAUTH;
1347: &Debug("exited pwauth with $? ($uname,$upass) ");
1348: $pwdcorrect=($? == 0);
1349: }
1350: if ($pwdcorrect) {
1351: my $execdir=$perlvar{'lonDaemons'};
1352: &Debug("Opening lcpasswd pipeline");
1353: my $pf = IO::File->new("|$execdir/lcpasswd > $perlvar{'lonDaemons'}/logs/lcpasswd.log");
1354: print $pf "$uname\n$npass\n$npass\n";
1355: close $pf;
1356: my $err = $?;
1357: my $result = ($err>0 ? 'pwchange_failure'
1358: : 'ok');
1359: &logthis("Result of password change for $uname: ".
1360: &lcpasswdstrerror($?));
1361: print $client "$result\n";
1362: } else {
1363: print $client "non_authorized\n";
1364: }
1365: } else {
1366: print $client "auth_mode_error\n";
1367: }
1368: } else {
1369: print $client "unknown_user\n";
1370: }
1371: } else {
1372: Reply($client, "refused\n", $userinput);
1373:
1374: }
1375: # -------------------------------------------------------------------- makeuser
1376: } elsif ($userinput =~ /^makeuser/) { # encoded and client.
1377: &Debug("Make user received");
1378: my $oldumask=umask(0077);
1379: if (($wasenc==1) && isClient) {
1380: my
1381: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
1382: &Debug("cmd =".$cmd." $udom =".$udom.
1383: " uname=".$uname);
1384: chomp($npass);
1385: $npass=&unescape($npass);
1386: my $proname=propath($udom,$uname);
1387: my $passfilename="$proname/passwd";
1388: &Debug("Password file created will be:".
1389: $passfilename);
1390: if (-e $passfilename) {
1391: print $client "already_exists\n";
1392: } elsif ($udom ne $currentdomainid) {
1393: print $client "not_right_domain\n";
1394: } else {
1395: my @fpparts=split(/\//,$proname);
1396: my $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
1397: my $fperror='';
1398: for (my $i=3;$i<=$#fpparts;$i++) {
1399: $fpnow.='/'.$fpparts[$i];
1400: unless (-e $fpnow) {
1401: unless (mkdir($fpnow,0777)) {
1402: $fperror="error: ".($!+0)
1403: ." mkdir failed while attempting "
1404: ."makeuser";
1405: }
1406: }
1407: }
1408: unless ($fperror) {
1409: my $result=&make_passwd_file($uname, $umode,$npass,
1410: $passfilename);
1411: print $client $result;
1412: } else {
1413: print $client "$fperror\n";
1414: }
1415: }
1416: } else {
1417: Reply($client, "refused\n", $userinput);
1418:
1419: }
1420: umask($oldumask);
1421: # -------------------------------------------------------------- changeuserauth
1422: } elsif ($userinput =~ /^changeuserauth/) { # encoded & client
1423: &Debug("Changing authorization");
1424: if (($wasenc==1) && isClient) {
1425: my
1426: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
1427: chomp($npass);
1428: &Debug("cmd = ".$cmd." domain= ".$udom.
1429: "uname =".$uname." umode= ".$umode);
1430: $npass=&unescape($npass);
1431: my $proname=&propath($udom,$uname);
1432: my $passfilename="$proname/passwd";
1433: if ($udom ne $currentdomainid) {
1434: print $client "not_right_domain\n";
1435: } else {
1436: my $result=&make_passwd_file($uname, $umode,$npass,
1437: $passfilename);
1438: print $client $result;
1439: }
1440: } else {
1441: Reply($client, "refused\n", $userinput);
1442:
1443: }
1444: # ------------------------------------------------------------------------ home
1445: } elsif ($userinput =~ /^home/) { # client clear or encoded
1446: if(isClient) {
1447: my ($cmd,$udom,$uname)=split(/:/,$userinput);
1448: chomp($uname);
1449: my $proname=propath($udom,$uname);
1450: if (-e $proname) {
1451: print $client "found\n";
1452: } else {
1453: print $client "not_found\n";
1454: }
1455: } else {
1456: Reply($client, "refused\n", $userinput);
1457:
1458: }
1459: # ---------------------------------------------------------------------- update
1460: } elsif ($userinput =~ /^update/) { # client clear or encoded.
1461: if(isClient) {
1462: my ($cmd,$fname)=split(/:/,$userinput);
1463: my $ownership=ishome($fname);
1464: if ($ownership eq 'not_owner') {
1465: if (-e $fname) {
1466: my ($dev,$ino,$mode,$nlink,
1467: $uid,$gid,$rdev,$size,
1468: $atime,$mtime,$ctime,
1469: $blksize,$blocks)=stat($fname);
1470: my $now=time;
1471: my $since=$now-$atime;
1472: if ($since>$perlvar{'lonExpire'}) {
1473: my $reply=
1474: &reply("unsub:$fname","$clientname");
1475: unlink("$fname");
1476: } else {
1477: my $transname="$fname.in.transfer";
1478: my $remoteurl=
1479: &reply("sub:$fname","$clientname");
1480: my $response;
1481: {
1482: my $ua=new LWP::UserAgent;
1483: my $request=new HTTP::Request('GET',"$remoteurl");
1484: $response=$ua->request($request,$transname);
1485: }
1486: if ($response->is_error()) {
1487: unlink($transname);
1488: my $message=$response->status_line;
1489: &logthis(
1490: "LWP GET: $message for $fname ($remoteurl)");
1491: } else {
1492: if ($remoteurl!~/\.meta$/) {
1493: my $ua=new LWP::UserAgent;
1494: my $mrequest=
1495: new HTTP::Request('GET',$remoteurl.'.meta');
1496: my $mresponse=
1497: $ua->request($mrequest,$fname.'.meta');
1498: if ($mresponse->is_error()) {
1499: unlink($fname.'.meta');
1500: }
1501: }
1502: rename($transname,$fname);
1503: }
1504: }
1505: print $client "ok\n";
1506: } else {
1507: print $client "not_found\n";
1508: }
1509: } else {
1510: print $client "rejected\n";
1511: }
1512: } else {
1513: Reply($client, "refused\n", $userinput);
1514:
1515: }
1516: # -------------------------------------- fetch a user file from a remote server
1517: } elsif ($userinput =~ /^fetchuserfile/) { # Client clear or enc.
1518: if(isClient) {
1519: my ($cmd,$fname)=split(/:/,$userinput);
1520: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
1521: my $udir=propath($udom,$uname).'/userfiles';
1522: unless (-e $udir) { mkdir($udir,0770); }
1523: if (-e $udir) {
1524: $ufile=~s/^[\.\~]+//;
1525: my $path = $udir;
1526: if ($ufile =~m|(.+)/([^/]+)$|) {
1527: my @parts=split('/',$1);
1528: foreach my $part (@parts) {
1529: $path .= '/'.$part;
1530: if ((-e $path)!=1) {
1531: mkdir($path,0770);
1532: }
1533: }
1534: }
1535: my $destname=$udir.'/'.$ufile;
1536: my $transname=$udir.'/'.$ufile.'.in.transit';
1537: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
1538: my $response;
1539: {
1540: my $ua=new LWP::UserAgent;
1541: my $request=new HTTP::Request('GET',"$remoteurl");
1542: $response=$ua->request($request,$transname);
1543: }
1544: if ($response->is_error()) {
1545: unlink($transname);
1546: my $message=$response->status_line;
1547: &logthis("LWP GET: $message for $fname ($remoteurl)");
1548: print $client "failed\n";
1549: } else {
1550: if (!rename($transname,$destname)) {
1551: &logthis("Unable to move $transname to $destname");
1552: unlink($transname);
1553: print $client "failed\n";
1554: } else {
1555: print $client "ok\n";
1556: }
1557: }
1558: } else {
1559: print $client "not_home\n";
1560: }
1561: } else {
1562: Reply($client, "refused\n", $userinput);
1563: }
1564: # --------------------------------------------------------- remove a user file
1565: } elsif ($userinput =~ /^removeuserfile/) { # Client clear or enc.
1566: if(isClient) {
1567: my ($cmd,$fname)=split(/:/,$userinput);
1568: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
1569: &logthis("$udom - $uname - $ufile");
1570: if ($ufile =~m|/\.\./|) {
1571: # any files paths with /../ in them refuse
1572: # to deal with
1573: print $client "refused\n";
1574: } else {
1575: my $udir=propath($udom,$uname);
1576: if (-e $udir) {
1577: my $file=$udir.'/userfiles/'.$ufile;
1578: if (-e $file) {
1579: unlink($file);
1580: if (-e $file) {
1581: print $client "failed\n";
1582: } else {
1583: print $client "ok\n";
1584: }
1585: } else {
1586: print $client "not_found\n";
1587: }
1588: } else {
1589: print $client "not_home\n";
1590: }
1591: }
1592: } else {
1593: Reply($client, "refused\n", $userinput);
1594: }
1595: # ------------------------------------------ authenticate access to a user file
1596: } elsif ($userinput =~ /^tokenauthuserfile/) { # Client only
1597: if(isClient) {
1598: my ($cmd,$fname,$session)=split(/:/,$userinput);
1599: chomp($session);
1600: my $reply='non_auth';
1601: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
1602: $session.'.id')) {
1603: while (my $line=<ENVIN>) {
1604: if ($line=~ m|userfile\.\Q$fname\E\=|) { $reply='ok'; }
1605: }
1606: close(ENVIN);
1607: print $client $reply."\n";
1608: } else {
1609: print $client "invalid_token\n";
1610: }
1611: } else {
1612: Reply($client, "refused\n", $userinput);
1613:
1614: }
1615: # ----------------------------------------------------------------- unsubscribe
1616: } elsif ($userinput =~ /^unsub/) {
1617: if(isClient) {
1618: my ($cmd,$fname)=split(/:/,$userinput);
1619: if (-e $fname) {
1620: print $client &unsub($fname,$clientip);
1621: } else {
1622: print $client "not_found\n";
1623: }
1624: } else {
1625: Reply($client, "refused\n", $userinput);
1626:
1627: }
1628: # ------------------------------------------------------------------- subscribe
1629: } elsif ($userinput =~ /^sub/) {
1630: if(isClient) {
1631: print $client &subscribe($userinput,$clientip);
1632: } else {
1633: Reply($client, "refused\n", $userinput);
1634:
1635: }
1636: # ------------------------------------------------------------- current version
1637: } elsif ($userinput =~ /^currentversion/) {
1638: if(isClient) {
1639: my ($cmd,$fname)=split(/:/,$userinput);
1640: print $client ¤tversion($fname)."\n";
1641: } else {
1642: Reply($client, "refused\n", $userinput);
1643:
1644: }
1645: # ------------------------------------------------------------------------- log
1646: } elsif ($userinput =~ /^log/) {
1647: if(isClient) {
1648: my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
1649: chomp($what);
1650: my $proname=propath($udom,$uname);
1651: my $now=time;
1652: {
1653: my $hfh;
1654: if ($hfh=IO::File->new(">>$proname/activity.log")) {
1655: print $hfh "$now:$clientname:$what\n";
1656: print $client "ok\n";
1657: } else {
1658: print $client "error: ".($!+0)
1659: ." IO::File->new Failed "
1660: ."while attempting log\n";
1661: }
1662: }
1663: } else {
1664: Reply($client, "refused\n", $userinput);
1665:
1666: }
1667: # ------------------------------------------------------------------------- put
1668: } elsif ($userinput =~ /^put/) {
1669: if(isClient) {
1670: my ($cmd,$udom,$uname,$namespace,$what)
1671: =split(/:/,$userinput,5);
1672: $namespace=~s/\//\_/g;
1673: $namespace=~s/\W//g;
1674: if ($namespace ne 'roles') {
1675: chomp($what);
1676: my $proname=propath($udom,$uname);
1677: my $now=time;
1678: my @pairs=split(/\&/,$what);
1679: my %hash;
1680: if (tie(%hash,'GDBM_File',
1681: "$proname/$namespace.db",
1682: &GDBM_WRCREAT(),0640)) {
1683: unless ($namespace=~/^nohist\_/) {
1684: my $hfh;
1685: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) { print $hfh "P:$now:$what\n"; }
1686: }
1687:
1688: foreach my $pair (@pairs) {
1689: my ($key,$value)=split(/=/,$pair);
1690: $hash{$key}=$value;
1691: }
1692: if (untie(%hash)) {
1693: print $client "ok\n";
1694: } else {
1695: print $client "error: ".($!+0)
1696: ." untie(GDBM) failed ".
1697: "while attempting put\n";
1698: }
1699: } else {
1700: print $client "error: ".($!)
1701: ." tie(GDBM) Failed ".
1702: "while attempting put\n";
1703: }
1704: } else {
1705: print $client "refused\n";
1706: }
1707: } else {
1708: Reply($client, "refused\n", $userinput);
1709:
1710: }
1711: # ------------------------------------------------------------------- inc
1712: } elsif ($userinput =~ /^inc:/) {
1713: if(isClient) {
1714: my ($cmd,$udom,$uname,$namespace,$what)
1715: =split(/:/,$userinput);
1716: $namespace=~s/\//\_/g;
1717: $namespace=~s/\W//g;
1718: if ($namespace ne 'roles') {
1719: chomp($what);
1720: my $proname=propath($udom,$uname);
1721: my $now=time;
1722: my @pairs=split(/\&/,$what);
1723: my %hash;
1724: if (tie(%hash,'GDBM_File',
1725: "$proname/$namespace.db",
1726: &GDBM_WRCREAT(),0640)) {
1727: unless ($namespace=~/^nohist\_/) {
1728: my $hfh;
1729: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) { print $hfh "P:$now:$what\n"; }
1730: }
1731: foreach my $pair (@pairs) {
1732: my ($key,$value)=split(/=/,$pair);
1733: # We could check that we have a number...
1734: if (! defined($value) || $value eq '') {
1735: $value = 1;
1736: }
1737: $hash{$key}+=$value;
1738: }
1739: if (untie(%hash)) {
1740: print $client "ok\n";
1741: } else {
1742: print $client "error: ".($!+0)
1743: ." untie(GDBM) failed ".
1744: "while attempting inc\n";
1745: }
1746: } else {
1747: print $client "error: ".($!)
1748: ." tie(GDBM) Failed ".
1749: "while attempting inc\n";
1750: }
1751: } else {
1752: print $client "refused\n";
1753: }
1754: } else {
1755: Reply($client, "refused\n", $userinput);
1756:
1757: }
1758: # -------------------------------------------------------------------- rolesput
1759: } elsif ($userinput =~ /^rolesput/) {
1760: if(isClient) {
1761: &Debug("rolesput");
1762: if ($wasenc==1) {
1763: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
1764: =split(/:/,$userinput);
1765: &Debug("cmd = ".$cmd." exedom= ".$exedom.
1766: "user = ".$exeuser." udom=".$udom.
1767: "what = ".$what);
1768: my $namespace='roles';
1769: chomp($what);
1770: my $proname=propath($udom,$uname);
1771: my $now=time;
1772: my @pairs=split(/\&/,$what);
1773: my %hash;
1774: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1775: {
1776: my $hfh;
1777: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) {
1778: print $hfh "P:$now:$exedom:$exeuser:$what\n";
1779: }
1780: }
1781:
1782: foreach my $pair (@pairs) {
1783: my ($key,$value)=split(/=/,$pair);
1784: &ManagePermissions($key, $udom, $uname,
1785: &GetAuthType( $udom,
1786: $uname));
1787: $hash{$key}=$value;
1788: }
1789: if (untie(%hash)) {
1790: print $client "ok\n";
1791: } else {
1792: print $client "error: ".($!+0)
1793: ." untie(GDBM) Failed ".
1794: "while attempting rolesput\n";
1795: }
1796: } else {
1797: print $client "error: ".($!+0)
1798: ." tie(GDBM) Failed ".
1799: "while attempting rolesput\n";
1800: }
1801: } else {
1802: print $client "refused\n";
1803: }
1804: } else {
1805: Reply($client, "refused\n", $userinput);
1806:
1807: }
1808: # -------------------------------------------------------------------- rolesdel
1809: } elsif ($userinput =~ /^rolesdel/) {
1810: if(isClient) {
1811: &Debug("rolesdel");
1812: if ($wasenc==1) {
1813: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
1814: =split(/:/,$userinput);
1815: &Debug("cmd = ".$cmd." exedom= ".$exedom.
1816: "user = ".$exeuser." udom=".$udom.
1817: "what = ".$what);
1818: my $namespace='roles';
1819: chomp($what);
1820: my $proname=propath($udom,$uname);
1821: my $now=time;
1822: my @rolekeys=split(/\&/,$what);
1823: my %hash;
1824: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1825: {
1826: my $hfh;
1827: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) {
1828: print $hfh "D:$now:$exedom:$exeuser:$what\n";
1829: }
1830: }
1831: foreach my $key (@rolekeys) {
1832: delete $hash{$key};
1833: }
1834: if (untie(%hash)) {
1835: print $client "ok\n";
1836: } else {
1837: print $client "error: ".($!+0)
1838: ." untie(GDBM) Failed ".
1839: "while attempting rolesdel\n";
1840: }
1841: } else {
1842: print $client "error: ".($!+0)
1843: ." tie(GDBM) Failed ".
1844: "while attempting rolesdel\n";
1845: }
1846: } else {
1847: print $client "refused\n";
1848: }
1849: } else {
1850: Reply($client, "refused\n", $userinput);
1851:
1852: }
1853: # ------------------------------------------------------------------------- get
1854: } elsif ($userinput =~ /^get/) {
1855: if(isClient) {
1856: my ($cmd,$udom,$uname,$namespace,$what)
1857: =split(/:/,$userinput);
1858: $namespace=~s/\//\_/g;
1859: $namespace=~s/\W//g;
1860: chomp($what);
1861: my @queries=split(/\&/,$what);
1862: my $proname=propath($udom,$uname);
1863: my $qresult='';
1864: my %hash;
1865: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1866: for (my $i=0;$i<=$#queries;$i++) {
1867: $qresult.="$hash{$queries[$i]}&";
1868: }
1869: if (untie(%hash)) {
1870: $qresult=~s/\&$//;
1871: print $client "$qresult\n";
1872: } else {
1873: print $client "error: ".($!+0)
1874: ." untie(GDBM) Failed ".
1875: "while attempting get\n";
1876: }
1877: } else {
1878: if ($!+0 == 2) {
1879: print $client "error:No such file or ".
1880: "GDBM reported bad block error\n";
1881: } else {
1882: print $client "error: ".($!+0)
1883: ." tie(GDBM) Failed ".
1884: "while attempting get\n";
1885: }
1886: }
1887: } else {
1888: Reply($client, "refused\n", $userinput);
1889:
1890: }
1891: # ------------------------------------------------------------------------ eget
1892: } elsif ($userinput =~ /^eget/) {
1893: if (isClient) {
1894: my ($cmd,$udom,$uname,$namespace,$what)
1895: =split(/:/,$userinput);
1896: $namespace=~s/\//\_/g;
1897: $namespace=~s/\W//g;
1898: chomp($what);
1899: my @queries=split(/\&/,$what);
1900: my $proname=propath($udom,$uname);
1901: my $qresult='';
1902: my %hash;
1903: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1904: for (my $i=0;$i<=$#queries;$i++) {
1905: $qresult.="$hash{$queries[$i]}&";
1906: }
1907: if (untie(%hash)) {
1908: $qresult=~s/\&$//;
1909: if ($cipher) {
1910: my $cmdlength=length($qresult);
1911: $qresult.=" ";
1912: my $encqresult='';
1913: for
1914: (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
1915: $encqresult.=
1916: unpack("H16",
1917: $cipher->encrypt(substr($qresult,$encidx,8)));
1918: }
1919: print $client "enc:$cmdlength:$encqresult\n";
1920: } else {
1921: print $client "error:no_key\n";
1922: }
1923: } else {
1924: print $client "error: ".($!+0)
1925: ." untie(GDBM) Failed ".
1926: "while attempting eget\n";
1927: }
1928: } else {
1929: print $client "error: ".($!+0)
1930: ." tie(GDBM) Failed ".
1931: "while attempting eget\n";
1932: }
1933: } else {
1934: Reply($client, "refused\n", $userinput);
1935:
1936: }
1937: # ------------------------------------------------------------------------- del
1938: } elsif ($userinput =~ /^del/) {
1939: if(isClient) {
1940: my ($cmd,$udom,$uname,$namespace,$what)
1941: =split(/:/,$userinput);
1942: $namespace=~s/\//\_/g;
1943: $namespace=~s/\W//g;
1944: chomp($what);
1945: my $proname=propath($udom,$uname);
1946: my $now=time;
1947: my @keys=split(/\&/,$what);
1948: my %hash;
1949: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1950: unless ($namespace=~/^nohist\_/) {
1951: my $hfh;
1952: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) { print $hfh "D:$now:$what\n"; }
1953: }
1954: foreach my $key (@keys) {
1955: delete($hash{$key});
1956: }
1957: if (untie(%hash)) {
1958: print $client "ok\n";
1959: } else {
1960: print $client "error: ".($!+0)
1961: ." untie(GDBM) Failed ".
1962: "while attempting del\n";
1963: }
1964: } else {
1965: print $client "error: ".($!+0)
1966: ." tie(GDBM) Failed ".
1967: "while attempting del\n";
1968: }
1969: } else {
1970: Reply($client, "refused\n", $userinput);
1971:
1972: }
1973: # ------------------------------------------------------------------------ keys
1974: } elsif ($userinput =~ /^keys/) {
1975: if(isClient) {
1976: my ($cmd,$udom,$uname,$namespace)
1977: =split(/:/,$userinput);
1978: $namespace=~s/\//\_/g;
1979: $namespace=~s/\W//g;
1980: my $proname=propath($udom,$uname);
1981: my $qresult='';
1982: my %hash;
1983: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1984: foreach my $key (keys %hash) {
1985: $qresult.="$key&";
1986: }
1987: if (untie(%hash)) {
1988: $qresult=~s/\&$//;
1989: print $client "$qresult\n";
1990: } else {
1991: print $client "error: ".($!+0)
1992: ." untie(GDBM) Failed ".
1993: "while attempting keys\n";
1994: }
1995: } else {
1996: print $client "error: ".($!+0)
1997: ." tie(GDBM) Failed ".
1998: "while attempting keys\n";
1999: }
2000: } else {
2001: Reply($client, "refused\n", $userinput);
2002:
2003: }
2004: # ----------------------------------------------------------------- dumpcurrent
2005: } elsif ($userinput =~ /^currentdump/) {
2006: if (isClient) {
2007: my ($cmd,$udom,$uname,$namespace)
2008: =split(/:/,$userinput);
2009: $namespace=~s/\//\_/g;
2010: $namespace=~s/\W//g;
2011: my $qresult='';
2012: my $proname=propath($udom,$uname);
2013: my %hash;
2014: if (tie(%hash,'GDBM_File',
2015: "$proname/$namespace.db",
2016: &GDBM_READER(),0640)) {
2017: # Structure of %data:
2018: # $data{$symb}->{$parameter}=$value;
2019: # $data{$symb}->{'v.'.$parameter}=$version;
2020: # since $parameter will be unescaped, we do not
2021: # have to worry about silly parameter names...
2022: my %data = ();
2023: while (my ($key,$value) = each(%hash)) {
2024: my ($v,$symb,$param) = split(/:/,$key);
2025: next if ($v eq 'version' || $symb eq 'keys');
2026: next if (exists($data{$symb}) &&
2027: exists($data{$symb}->{$param}) &&
2028: $data{$symb}->{'v.'.$param} > $v);
2029: $data{$symb}->{$param}=$value;
2030: $data{$symb}->{'v.'.$param}=$v;
2031: }
2032: if (untie(%hash)) {
2033: while (my ($symb,$param_hash) = each(%data)) {
2034: while(my ($param,$value) = each (%$param_hash)){
2035: next if ($param =~ /^v\./);
2036: $qresult.=$symb.':'.$param.'='.$value.'&';
2037: }
2038: }
2039: chop($qresult);
2040: print $client "$qresult\n";
2041: } else {
2042: print $client "error: ".($!+0)
2043: ." untie(GDBM) Failed ".
2044: "while attempting currentdump\n";
2045: }
2046: } else {
2047: print $client "error: ".($!+0)
2048: ." tie(GDBM) Failed ".
2049: "while attempting currentdump\n";
2050: }
2051: } else {
2052: Reply($client, "refused\n", $userinput);
2053: }
2054: # ------------------------------------------------------------------------ dump
2055: } elsif ($userinput =~ /^dump/) {
2056: if(isClient) {
2057: my ($cmd,$udom,$uname,$namespace,$regexp)
2058: =split(/:/,$userinput);
2059: $namespace=~s/\//\_/g;
2060: $namespace=~s/\W//g;
2061: if (defined($regexp)) {
2062: $regexp=&unescape($regexp);
2063: } else {
2064: $regexp='.';
2065: }
2066: my $qresult='';
2067: my $proname=propath($udom,$uname);
2068: my %hash;
2069: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2070: while (my ($key,$value) = each(%hash)) {
2071: if ($regexp eq '.') {
2072: $qresult.=$key.'='.$value.'&';
2073: } else {
2074: my $unescapeKey = &unescape($key);
2075: if (eval('$unescapeKey=~/$regexp/')) {
2076: $qresult.="$key=$value&";
2077: }
2078: }
2079: }
2080: if (untie(%hash)) {
2081: chop($qresult);
2082: print $client "$qresult\n";
2083: } else {
2084: print $client "error: ".($!+0)
2085: ." untie(GDBM) Failed ".
2086: "while attempting dump\n";
2087: }
2088: } else {
2089: print $client "error: ".($!+0)
2090: ." tie(GDBM) Failed ".
2091: "while attempting dump\n";
2092: }
2093: } else {
2094: Reply($client, "refused\n", $userinput);
2095:
2096: }
2097: # ----------------------------------------------------------------------- store
2098: } elsif ($userinput =~ /^store/) {
2099: if(isClient) {
2100: my ($cmd,$udom,$uname,$namespace,$rid,$what)
2101: =split(/:/,$userinput);
2102: $namespace=~s/\//\_/g;
2103: $namespace=~s/\W//g;
2104: if ($namespace ne 'roles') {
2105: chomp($what);
2106: my $proname=propath($udom,$uname);
2107: my $now=time;
2108: my @pairs=split(/\&/,$what);
2109: my %hash;
2110: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2111: unless ($namespace=~/^nohist\_/) {
2112: my $hfh;
2113: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) {
2114: print $hfh "P:$now:$rid:$what\n";
2115: }
2116: }
2117: my @previouskeys=split(/&/,$hash{"keys:$rid"});
2118: my $key;
2119: $hash{"version:$rid"}++;
2120: my $version=$hash{"version:$rid"};
2121: my $allkeys='';
2122: foreach my $pair (@pairs) {
2123: my ($key,$value)=split(/=/,$pair);
2124: $allkeys.=$key.':';
2125: $hash{"$version:$rid:$key"}=$value;
2126: }
2127: $hash{"$version:$rid:timestamp"}=$now;
2128: $allkeys.='timestamp';
2129: $hash{"$version:keys:$rid"}=$allkeys;
2130: if (untie(%hash)) {
2131: print $client "ok\n";
2132: } else {
2133: print $client "error: ".($!+0)
2134: ." untie(GDBM) Failed ".
2135: "while attempting store\n";
2136: }
2137: } else {
2138: print $client "error: ".($!+0)
2139: ." tie(GDBM) Failed ".
2140: "while attempting store\n";
2141: }
2142: } else {
2143: print $client "refused\n";
2144: }
2145: } else {
2146: Reply($client, "refused\n", $userinput);
2147:
2148: }
2149: # --------------------------------------------------------------------- restore
2150: } elsif ($userinput =~ /^restore/) {
2151: if(isClient) {
2152: my ($cmd,$udom,$uname,$namespace,$rid)
2153: =split(/:/,$userinput);
2154: $namespace=~s/\//\_/g;
2155: $namespace=~s/\W//g;
2156: chomp($rid);
2157: my $proname=propath($udom,$uname);
2158: my $qresult='';
2159: my %hash;
2160: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2161: my $version=$hash{"version:$rid"};
2162: $qresult.="version=$version&";
2163: my $scope;
2164: for ($scope=1;$scope<=$version;$scope++) {
2165: my $vkeys=$hash{"$scope:keys:$rid"};
2166: my @keys=split(/:/,$vkeys);
2167: my $key;
2168: $qresult.="$scope:keys=$vkeys&";
2169: foreach $key (@keys) {
2170: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
2171: }
2172: }
2173: if (untie(%hash)) {
2174: $qresult=~s/\&$//;
2175: print $client "$qresult\n";
2176: } else {
2177: print $client "error: ".($!+0)
2178: ." untie(GDBM) Failed ".
2179: "while attempting restore\n";
2180: }
2181: } else {
2182: print $client "error: ".($!+0)
2183: ." tie(GDBM) Failed ".
2184: "while attempting restore\n";
2185: }
2186: } else {
2187: Reply($client, "refused\n", $userinput);
2188:
2189: }
2190: # -------------------------------------------------------------------- chatsend
2191: } elsif ($userinput =~ /^chatsend/) {
2192: if(isClient) {
2193: my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
2194: &chatadd($cdom,$cnum,$newpost);
2195: print $client "ok\n";
2196: } else {
2197: Reply($client, "refused\n", $userinput);
2198:
2199: }
2200: # -------------------------------------------------------------------- chatretr
2201: } elsif ($userinput =~ /^chatretr/) {
2202: if(isClient) {
2203: my
2204: ($cmd,$cdom,$cnum,$udom,$uname)=split(/\:/,$userinput);
2205: my $reply='';
2206: foreach (&getchat($cdom,$cnum,$udom,$uname)) {
2207: $reply.=&escape($_).':';
2208: }
2209: $reply=~s/\:$//;
2210: print $client $reply."\n";
2211: } else {
2212: Reply($client, "refused\n", $userinput);
2213:
2214: }
2215: # ------------------------------------------------------------------- querysend
2216: } elsif ($userinput =~ /^querysend/) {
2217: if (isClient) {
2218: my ($cmd,$query,
2219: $arg1,$arg2,$arg3)=split(/\:/,$userinput);
2220: $query=~s/\n*$//g;
2221: print $client "".
2222: sqlreply("$clientname\&$query".
2223: "\&$arg1"."\&$arg2"."\&$arg3")."\n";
2224: } else {
2225: Reply($client, "refused\n", $userinput);
2226:
2227: }
2228: # ------------------------------------------------------------------ queryreply
2229: } elsif ($userinput =~ /^queryreply/) {
2230: if(isClient) {
2231: my ($cmd,$id,$reply)=split(/:/,$userinput);
2232: my $store;
2233: my $execdir=$perlvar{'lonDaemons'};
2234: if ($store=IO::File->new(">$execdir/tmp/$id")) {
2235: $reply=~s/\&/\n/g;
2236: print $store $reply;
2237: close $store;
2238: my $store2=IO::File->new(">$execdir/tmp/$id.end");
2239: print $store2 "done\n";
2240: close $store2;
2241: print $client "ok\n";
2242: }
2243: else {
2244: print $client "error: ".($!+0)
2245: ." IO::File->new Failed ".
2246: "while attempting queryreply\n";
2247: }
2248: } else {
2249: Reply($client, "refused\n", $userinput);
2250:
2251: }
2252: # ----------------------------------------------------------------- courseidput
2253: } elsif ($userinput =~ /^courseidput/) {
2254: if(isClient) {
2255: my ($cmd,$udom,$what)=split(/:/,$userinput);
2256: chomp($what);
2257: $udom=~s/\W//g;
2258: my $proname=
2259: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
2260: my $now=time;
2261: my @pairs=split(/\&/,$what);
2262: my %hash;
2263: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
2264: foreach my $pair (@pairs) {
2265: my ($key,$descr,$inst_code)=split(/=/,$pair);
2266: $hash{$key}=$descr.':'.$inst_code.':'.$now;
2267: }
2268: if (untie(%hash)) {
2269: print $client "ok\n";
2270: } else {
2271: print $client "error: ".($!+0)
2272: ." untie(GDBM) Failed ".
2273: "while attempting courseidput\n";
2274: }
2275: } else {
2276: print $client "error: ".($!+0)
2277: ." tie(GDBM) Failed ".
2278: "while attempting courseidput\n";
2279: }
2280: } else {
2281: Reply($client, "refused\n", $userinput);
2282:
2283: }
2284: # ---------------------------------------------------------------- courseiddump
2285: } elsif ($userinput =~ /^courseiddump/) {
2286: if(isClient) {
2287: my ($cmd,$udom,$since,$description)
2288: =split(/:/,$userinput);
2289: if (defined($description)) {
2290: $description=&unescape($description);
2291: } else {
2292: $description='.';
2293: }
2294: unless (defined($since)) { $since=0; }
2295: my $qresult='';
2296: my $proname=
2297: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
2298: my %hash;
2299: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
2300: while (my ($key,$value) = each(%hash)) {
2301: my ($descr,$lasttime,$inst_code);
2302: if ($value =~ m/^([^\:]*):([^\:]*):(\d+)$/) {
2303: ($descr,$inst_code,$lasttime)=($1,$2,$3);
2304: } else {
2305: ($descr,$lasttime) = split(/\:/,$value);
2306: }
2307: if ($lasttime<$since) { next; }
2308: if ($description eq '.') {
2309: $qresult.=$key.'='.$descr.':'.$inst_code.'&';
2310: } else {
2311: my $unescapeVal = &unescape($descr);
2312: if (eval('$unescapeVal=~/\Q$description\E/i')) {
2313: $qresult.=$key.'='.$descr.':'.$inst_code.'&';
2314: }
2315: }
2316: }
2317: if (untie(%hash)) {
2318: chop($qresult);
2319: print $client "$qresult\n";
2320: } else {
2321: print $client "error: ".($!+0)
2322: ." untie(GDBM) Failed ".
2323: "while attempting courseiddump\n";
2324: }
2325: } else {
2326: print $client "error: ".($!+0)
2327: ." tie(GDBM) Failed ".
2328: "while attempting courseiddump\n";
2329: }
2330: } else {
2331: Reply($client, "refused\n", $userinput);
2332:
2333: }
2334: # ----------------------------------------------------------------------- idput
2335: } elsif ($userinput =~ /^idput/) {
2336: if(isClient) {
2337: my ($cmd,$udom,$what)=split(/:/,$userinput);
2338: chomp($what);
2339: $udom=~s/\W//g;
2340: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
2341: my $now=time;
2342: my @pairs=split(/\&/,$what);
2343: my %hash;
2344: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
2345: {
2346: my $hfh;
2347: if ($hfh=IO::File->new(">>$proname.hist")) {
2348: print $hfh "P:$now:$what\n";
2349: }
2350: }
2351: foreach my $pair (@pairs) {
2352: my ($key,$value)=split(/=/,$pair);
2353: $hash{$key}=$value;
2354: }
2355: if (untie(%hash)) {
2356: print $client "ok\n";
2357: } else {
2358: print $client "error: ".($!+0)
2359: ." untie(GDBM) Failed ".
2360: "while attempting idput\n";
2361: }
2362: } else {
2363: print $client "error: ".($!+0)
2364: ." tie(GDBM) Failed ".
2365: "while attempting idput\n";
2366: }
2367: } else {
2368: Reply($client, "refused\n", $userinput);
2369:
2370: }
2371: # ----------------------------------------------------------------------- idget
2372: } elsif ($userinput =~ /^idget/) {
2373: if(isClient) {
2374: my ($cmd,$udom,$what)=split(/:/,$userinput);
2375: chomp($what);
2376: $udom=~s/\W//g;
2377: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
2378: my @queries=split(/\&/,$what);
2379: my $qresult='';
2380: my %hash;
2381: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
2382: for (my $i=0;$i<=$#queries;$i++) {
2383: $qresult.="$hash{$queries[$i]}&";
2384: }
2385: if (untie(%hash)) {
2386: $qresult=~s/\&$//;
2387: print $client "$qresult\n";
2388: } else {
2389: print $client "error: ".($!+0)
2390: ." untie(GDBM) Failed ".
2391: "while attempting idget\n";
2392: }
2393: } else {
2394: print $client "error: ".($!+0)
2395: ." tie(GDBM) Failed ".
2396: "while attempting idget\n";
2397: }
2398: } else {
2399: Reply($client, "refused\n", $userinput);
2400:
2401: }
2402: # ---------------------------------------------------------------------- tmpput
2403: } elsif ($userinput =~ /^tmpput/) {
2404: if(isClient) {
2405: my ($cmd,$what)=split(/:/,$userinput);
2406: my $store;
2407: $tmpsnum++;
2408: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
2409: $id=~s/\W/\_/g;
2410: $what=~s/\n//g;
2411: my $execdir=$perlvar{'lonDaemons'};
2412: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
2413: print $store $what;
2414: close $store;
2415: print $client "$id\n";
2416: }
2417: else {
2418: print $client "error: ".($!+0)
2419: ."IO::File->new Failed ".
2420: "while attempting tmpput\n";
2421: }
2422: } else {
2423: Reply($client, "refused\n", $userinput);
2424:
2425: }
2426:
2427: # ---------------------------------------------------------------------- tmpget
2428: } elsif ($userinput =~ /^tmpget/) {
2429: if(isClient) {
2430: my ($cmd,$id)=split(/:/,$userinput);
2431: chomp($id);
2432: $id=~s/\W/\_/g;
2433: my $store;
2434: my $execdir=$perlvar{'lonDaemons'};
2435: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
2436: my $reply=<$store>;
2437: print $client "$reply\n";
2438: close $store;
2439: }
2440: else {
2441: print $client "error: ".($!+0)
2442: ."IO::File->new Failed ".
2443: "while attempting tmpget\n";
2444: }
2445: } else {
2446: Reply($client, "refused\n", $userinput);
2447:
2448: }
2449: # ---------------------------------------------------------------------- tmpdel
2450: } elsif ($userinput =~ /^tmpdel/) {
2451: if(isClient) {
2452: my ($cmd,$id)=split(/:/,$userinput);
2453: chomp($id);
2454: $id=~s/\W/\_/g;
2455: my $execdir=$perlvar{'lonDaemons'};
2456: if (unlink("$execdir/tmp/$id.tmp")) {
2457: print $client "ok\n";
2458: } else {
2459: print $client "error: ".($!+0)
2460: ."Unlink tmp Failed ".
2461: "while attempting tmpdel\n";
2462: }
2463: } else {
2464: Reply($client, "refused\n", $userinput);
2465:
2466: }
2467: # ----------------------------------------- portfolio directory list (portls)
2468: } elsif ($userinput =~ /^portls/) {
2469: if(isClient) {
2470: my ($cmd,$uname,$udom)=split(/:/,$userinput);
2471: my $udir=propath($udom,$uname).'/userfiles/portfolio';
2472: my $dirLine='';
2473: my $dirContents='';
2474: if (opendir(LSDIR,$udir.'/')){
2475: while ($dirLine = readdir(LSDIR)){
2476: $dirContents = $dirContents.$dirLine.'<br />';
2477: }
2478: } else {
2479: $dirContents = "No directory found\n";
2480: }
2481: print $client $dirContents."\n";
2482: } else {
2483: Reply($client, "refused\n", $userinput);
2484: }
2485: # -------------------------------------------------------------------------- ls
2486: } elsif ($userinput =~ /^ls/) {
2487: if(isClient) {
2488: my $obs;
2489: my $rights;
2490: my ($cmd,$ulsdir)=split(/:/,$userinput);
2491: my $ulsout='';
2492: my $ulsfn;
2493: if (-e $ulsdir) {
2494: if(-d $ulsdir) {
2495: if (opendir(LSDIR,$ulsdir)) {
2496: while ($ulsfn=readdir(LSDIR)) {
2497: undef $obs, $rights;
2498: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
2499: #We do some obsolete checking here
2500: if(-e $ulsdir.'/'.$ulsfn.".meta") {
2501: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
2502: my @obsolete=<FILE>;
2503: foreach my $obsolete (@obsolete) {
2504: if($obsolete =~ m|(<obsolete>)(on)|) { $obs = 1; }
2505: if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
2506: }
2507: }
2508: $ulsout.=$ulsfn.'&'.join('&',@ulsstats);
2509: if($obs eq '1') { $ulsout.="&1"; }
2510: else { $ulsout.="&0"; }
2511: if($rights eq '1') { $ulsout.="&1:"; }
2512: else { $ulsout.="&0:"; }
2513: }
2514: closedir(LSDIR);
2515: }
2516: } else {
2517: my @ulsstats=stat($ulsdir);
2518: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
2519: }
2520: } else {
2521: $ulsout='no_such_dir';
2522: }
2523: if ($ulsout eq '') { $ulsout='empty'; }
2524: print $client "$ulsout\n";
2525: } else {
2526: Reply($client, "refused\n", $userinput);
2527:
2528: }
2529: # ----------------------------------------------------------------- setannounce
2530: } elsif ($userinput =~ /^setannounce/) {
2531: if (isClient) {
2532: my ($cmd,$announcement)=split(/:/,$userinput);
2533: chomp($announcement);
2534: $announcement=&unescape($announcement);
2535: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
2536: '/announcement.txt')) {
2537: print $store $announcement;
2538: close $store;
2539: print $client "ok\n";
2540: } else {
2541: print $client "error: ".($!+0)."\n";
2542: }
2543: } else {
2544: Reply($client, "refused\n", $userinput);
2545:
2546: }
2547: # ------------------------------------------------------------------ Hanging up
2548: } elsif (($userinput =~ /^exit/) ||
2549: ($userinput =~ /^init/)) { # no restrictions.
2550: &logthis(
2551: "Client $clientip ($clientname) hanging up: $userinput");
2552: print $client "bye\n";
2553: $client->shutdown(2); # shutdown the socket forcibly.
2554: $client->close();
2555: return 0;
2556:
2557: # ---------------------------------- set current host/domain
2558: } elsif ($userinput =~ /^sethost:/) {
2559: if (isClient) {
2560: print $client &sethost($userinput)."\n";
2561: } else {
2562: print $client "refused\n";
2563: }
2564: #---------------------------------- request file (?) version.
2565: } elsif ($userinput =~/^version:/) {
2566: if (isClient) {
2567: print $client &version($userinput)."\n";
2568: } else {
2569: print $client "refused\n";
2570: }
2571: #------------------------------- is auto-enrollment enabled?
2572: } elsif ($userinput =~/^autorun:/) {
2573: if (isClient) {
2574: my ($cmd,$cdom) = split(/:/,$userinput);
2575: my $outcome = &localenroll::run($cdom);
2576: print $client "$outcome\n";
2577: } else {
2578: print $client "0\n";
2579: }
2580: #------------------------------- get official sections (for auto-enrollment).
2581: } elsif ($userinput =~/^autogetsections:/) {
2582: if (isClient) {
2583: my ($cmd,$coursecode,$cdom)=split(/:/,$userinput);
2584: my @secs = &localenroll::get_sections($coursecode,$cdom);
2585: my $seclist = &escape(join(':',@secs));
2586: print $client "$seclist\n";
2587: } else {
2588: print $client "refused\n";
2589: }
2590: #----------------------- validate owner of new course section (for auto-enrollment).
2591: } elsif ($userinput =~/^autonewcourse:/) {
2592: if (isClient) {
2593: my ($cmd,$inst_course_id,$owner,$cdom)=split(/:/,$userinput);
2594: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom);
2595: print $client "$outcome\n";
2596: } else {
2597: print $client "refused\n";
2598: }
2599: #-------------- validate course section in schedule of classes (for auto-enrollment).
2600: } elsif ($userinput =~/^autovalidatecourse:/) {
2601: if (isClient) {
2602: my ($cmd,$inst_course_id,$cdom)=split(/:/,$userinput);
2603: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
2604: print $client "$outcome\n";
2605: } else {
2606: print $client "refused\n";
2607: }
2608: #--------------------------- create password for new user (for auto-enrollment).
2609: } elsif ($userinput =~/^autocreatepassword:/) {
2610: if (isClient) {
2611: my ($cmd,$authparam,$cdom)=split(/:/,$userinput);
2612: my ($create_passwd,$authchk);
2613: ($authparam,$create_passwd,$authchk) = &localenroll::create_password($authparam,$cdom);
2614: print $client &escape($authparam.':'.$create_passwd.':'.$authchk)."\n";
2615: } else {
2616: print $client "refused\n";
2617: }
2618: #--------------------------- read and remove temporary files (for auto-enrollment).
2619: } elsif ($userinput =~/^autoretrieve:/) {
2620: if (isClient) {
2621: my ($cmd,$filename) = split(/:/,$userinput);
2622: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
2623: if ( (-e $source) && ($filename ne '') ) {
2624: my $reply = '';
2625: if (open(my $fh,$source)) {
2626: while (<$fh>) {
2627: chomp($_);
2628: $_ =~ s/^\s+//g;
2629: $_ =~ s/\s+$//g;
2630: $reply .= $_;
2631: }
2632: close($fh);
2633: print $client &escape($reply)."\n";
2634: # unlink($source);
2635: } else {
2636: print $client "error\n";
2637: }
2638: } else {
2639: print $client "error\n";
2640: }
2641: } else {
2642: print $client "refused\n";
2643: }
2644: #--------------------- read and retrieve institutional code format (for support form).
2645: } elsif ($userinput =~/^autoinstcodeformat:/) {
2646: if (isClient) {
2647: my $reply;
2648: my($cmd,$cdom,$course) = split(/:/,$userinput);
2649: my @pairs = split/\&/,$course;
2650: my %instcodes = ();
2651: my %codes = ();
2652: my @codetitles = ();
2653: my %cat_titles = ();
2654: my %cat_order = ();
2655: foreach (@pairs) {
2656: my ($key,$value) = split/=/,$_;
2657: $instcodes{&unescape($key)} = &unescape($value);
2658: }
2659: my $formatreply = &localenroll::instcode_format($cdom,\%instcodes,\%codes,\@codetitles,\%cat_titles,\%cat_order);
2660: if ($formatreply eq 'ok') {
2661: my $codes_str = &hash2str(%codes);
2662: my $codetitles_str = &array2str(@codetitles);
2663: my $cat_titles_str = &hash2str(%cat_titles);
2664: my $cat_order_str = &hash2str(%cat_order);
2665: print $client $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'.$cat_order_str."\n";
2666: }
2667: } else {
2668: print $client "refused\n";
2669: }
2670: # ------------------------------------------------------------- unknown command
2671:
2672: } else {
2673: # unknown command
2674: print $client "unknown_cmd\n";
2675: }
2676: # -------------------------------------------------------------------- complete
2677: Debug("process_request - returning 1");
2678: return 1;
2679: }
2680: #
2681: # Decipher encoded traffic
2682: # Parameters:
2683: # input - Encoded data.
2684: # Returns:
2685: # Decoded data or undef if encryption key was not yet negotiated.
2686: # Implicit input:
2687: # cipher - This global holds the negotiated encryption key.
2688: #
2689: sub decipher {
2690: my ($input) = @_;
2691: my $output = '';
2692:
2693:
2694: if($cipher) {
2695: my($enc, $enclength, $encinput) = split(/:/, $input);
2696: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
2697: $output .=
2698: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
2699: }
2700: return substr($output, 0, $enclength);
2701: } else {
2702: return undef;
2703: }
2704: }
2705:
2706: #
2707: # Register a command processor. This function is invoked to register a sub
2708: # to process a request. Once registered, the ProcessRequest sub can automatically
2709: # dispatch requests to an appropriate sub, and do the top level validity checking
2710: # as well:
2711: # - Is the keyword recognized.
2712: # - Is the proper client type attempting the request.
2713: # - Is the request encrypted if it has to be.
2714: # Parameters:
2715: # $request_name - Name of the request being registered.
2716: # This is the command request that will match
2717: # against the hash keywords to lookup the information
2718: # associated with the dispatch information.
2719: # $procedure - Reference to a sub to call to process the request.
2720: # All subs get called as follows:
2721: # Procedure($cmd, $tail, $replyfd, $key)
2722: # $cmd - the actual keyword that invoked us.
2723: # $tail - the tail of the request that invoked us.
2724: # $replyfd- File descriptor connected to the client
2725: # $must_encode - True if the request must be encoded to be good.
2726: # $client_ok - True if it's ok for a client to request this.
2727: # $manager_ok - True if it's ok for a manager to request this.
2728: # Side effects:
2729: # - On success, the Dispatcher hash has an entry added for the key $RequestName
2730: # - On failure, the program will die as it's a bad internal bug to try to
2731: # register a duplicate command handler.
2732: #
2733: sub register_handler {
2734: my ($request_name,$procedure,$must_encode, $client_ok,$manager_ok) = @_;
2735:
2736: # Don't allow duplication#
2737:
2738: if (defined $Dispatcher{$request_name}) {
2739: die "Attempting to define a duplicate request handler for $request_name\n";
2740: }
2741: # Build the client type mask:
2742:
2743: my $client_type_mask = 0;
2744: if($client_ok) {
2745: $client_type_mask |= $CLIENT_OK;
2746: }
2747: if($manager_ok) {
2748: $client_type_mask |= $MANAGER_OK;
2749: }
2750:
2751: # Enter the hash:
2752:
2753: my @entry = ($procedure, $must_encode, $client_type_mask);
2754:
2755: $Dispatcher{$request_name} = \@entry;
2756:
2757:
2758: }
2759:
2760:
2761: #------------------------------------------------------------------
2762:
2763:
2764:
2765:
2766: #
2767: # Convert an error return code from lcpasswd to a string value.
2768: #
2769: sub lcpasswdstrerror {
2770: my $ErrorCode = shift;
2771: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
2772: return "lcpasswd Unrecognized error return value ".$ErrorCode;
2773: } else {
2774: return $passwderrors[$ErrorCode];
2775: }
2776: }
2777:
2778: #
2779: # Convert an error return code from lcuseradd to a string value:
2780: #
2781: sub lcuseraddstrerror {
2782: my $ErrorCode = shift;
2783: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
2784: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
2785: } else {
2786: return $adderrors[$ErrorCode];
2787: }
2788: }
2789:
2790: # grabs exception and records it to log before exiting
2791: sub catchexception {
2792: my ($error)=@_;
2793: $SIG{'QUIT'}='DEFAULT';
2794: $SIG{__DIE__}='DEFAULT';
2795: &status("Catching exception");
2796: &logthis("<font color='red'>CRITICAL: "
2797: ."ABNORMAL EXIT. Child $$ for server $thisserver died through "
2798: ."a crash with this error msg->[$error]</font>");
2799: &logthis('Famous last words: '.$status.' - '.$lastlog);
2800: if ($client) { print $client "error: $error\n"; }
2801: $server->close();
2802: die($error);
2803: }
2804:
2805: sub timeout {
2806: &status("Handling Timeout");
2807: &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
2808: &catchexception('Timeout');
2809: }
2810: # -------------------------------- Set signal handlers to record abnormal exits
2811:
2812: $SIG{'QUIT'}=\&catchexception;
2813: $SIG{__DIE__}=\&catchexception;
2814:
2815: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
2816: &status("Read loncapa.conf and loncapa_apache.conf");
2817: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
2818: %perlvar=%{$perlvarref};
2819: undef $perlvarref;
2820:
2821: # ----------------------------- Make sure this process is running from user=www
2822: my $wwwid=getpwnam('www');
2823: if ($wwwid!=$<) {
2824: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
2825: my $subj="LON: $currenthostid User ID mismatch";
2826: system("echo 'User ID mismatch. lond must be run as user www.' |\
2827: mailto $emailto -s '$subj' > /dev/null");
2828: exit 1;
2829: }
2830:
2831: # --------------------------------------------- Check if other instance running
2832:
2833: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
2834:
2835: if (-e $pidfile) {
2836: my $lfh=IO::File->new("$pidfile");
2837: my $pide=<$lfh>;
2838: chomp($pide);
2839: if (kill 0 => $pide) { die "already running"; }
2840: }
2841:
2842: # ------------------------------------------------------------- Read hosts file
2843:
2844:
2845:
2846: # establish SERVER socket, bind and listen.
2847: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
2848: Type => SOCK_STREAM,
2849: Proto => 'tcp',
2850: Reuse => 1,
2851: Listen => 10 )
2852: or die "making socket: $@\n";
2853:
2854: # --------------------------------------------------------- Do global variables
2855:
2856: # global variables
2857:
2858: my %children = (); # keys are current child process IDs
2859:
2860: sub REAPER { # takes care of dead children
2861: $SIG{CHLD} = \&REAPER;
2862: &status("Handling child death");
2863: my $pid;
2864: do {
2865: $pid = waitpid(-1,&WNOHANG());
2866: if (defined($children{$pid})) {
2867: &logthis("Child $pid died");
2868: delete($children{$pid});
2869: } elsif ($pid > 0) {
2870: &logthis("Unknown Child $pid died");
2871: }
2872: } while ( $pid > 0 );
2873: foreach my $child (keys(%children)) {
2874: $pid = waitpid($child,&WNOHANG());
2875: if ($pid > 0) {
2876: &logthis("Child $child - $pid looks like we missed it's death");
2877: delete($children{$pid});
2878: }
2879: }
2880: &status("Finished Handling child death");
2881: }
2882:
2883: sub HUNTSMAN { # signal handler for SIGINT
2884: &status("Killing children (INT)");
2885: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
2886: kill 'INT' => keys %children;
2887: &logthis("Free socket: ".shutdown($server,2)); # free up socket
2888: my $execdir=$perlvar{'lonDaemons'};
2889: unlink("$execdir/logs/lond.pid");
2890: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
2891: &status("Done killing children");
2892: exit; # clean up with dignity
2893: }
2894:
2895: sub HUPSMAN { # signal handler for SIGHUP
2896: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
2897: &status("Killing children for restart (HUP)");
2898: kill 'INT' => keys %children;
2899: &logthis("Free socket: ".shutdown($server,2)); # free up socket
2900: &logthis("<font color='red'>CRITICAL: Restarting</font>");
2901: my $execdir=$perlvar{'lonDaemons'};
2902: unlink("$execdir/logs/lond.pid");
2903: &status("Restarting self (HUP)");
2904: exec("$execdir/lond"); # here we go again
2905: }
2906:
2907: #
2908: # Kill off hashes that describe the host table prior to re-reading it.
2909: # Hashes affected are:
2910: # %hostid, %hostdom %hostip %hostdns.
2911: #
2912: sub KillHostHashes {
2913: foreach my $key (keys %hostid) {
2914: delete $hostid{$key};
2915: }
2916: foreach my $key (keys %hostdom) {
2917: delete $hostdom{$key};
2918: }
2919: foreach my $key (keys %hostip) {
2920: delete $hostip{$key};
2921: }
2922: foreach my $key (keys %hostdns) {
2923: delete $hostdns{$key};
2924: }
2925: }
2926: #
2927: # Read in the host table from file and distribute it into the various hashes:
2928: #
2929: # - %hostid - Indexed by IP, the loncapa hostname.
2930: # - %hostdom - Indexed by loncapa hostname, the domain.
2931: # - %hostip - Indexed by hostid, the Ip address of the host.
2932: sub ReadHostTable {
2933:
2934: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
2935: my $myloncapaname = $perlvar{'lonHostID'};
2936: Debug("My loncapa name is : $myloncapaname");
2937: while (my $configline=<CONFIG>) {
2938: if (!($configline =~ /^\s*\#/)) {
2939: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
2940: chomp($ip); $ip=~s/\D+$//;
2941: $hostid{$ip}=$id; # LonCAPA name of host by IP.
2942: $hostdom{$id}=$domain; # LonCAPA domain name of host.
2943: $hostip{$id}=$ip; # IP address of host.
2944: $hostdns{$name} = $id; # LonCAPA name of host by DNS.
2945:
2946: if ($id eq $perlvar{'lonHostID'}) {
2947: Debug("Found me in the host table: $name");
2948: $thisserver=$name;
2949: }
2950: }
2951: }
2952: close(CONFIG);
2953: }
2954: #
2955: # Reload the Apache daemon's state.
2956: # This is done by invoking /home/httpd/perl/apachereload
2957: # a setuid perl script that can be root for us to do this job.
2958: #
2959: sub ReloadApache {
2960: my $execdir = $perlvar{'lonDaemons'};
2961: my $script = $execdir."/apachereload";
2962: system($script);
2963: }
2964:
2965: #
2966: # Called in response to a USR2 signal.
2967: # - Reread hosts.tab
2968: # - All children connected to hosts that were removed from hosts.tab
2969: # are killed via SIGINT
2970: # - All children connected to previously existing hosts are sent SIGUSR1
2971: # - Our internal hosts hash is updated to reflect the new contents of
2972: # hosts.tab causing connections from hosts added to hosts.tab to
2973: # now be honored.
2974: #
2975: sub UpdateHosts {
2976: &status("Reload hosts.tab");
2977: logthis('<font color="blue"> Updating connections </font>');
2978: #
2979: # The %children hash has the set of IP's we currently have children
2980: # on. These need to be matched against records in the hosts.tab
2981: # Any ip's no longer in the table get killed off they correspond to
2982: # either dropped or changed hosts. Note that the re-read of the table
2983: # will take care of new and changed hosts as connections come into being.
2984:
2985:
2986: KillHostHashes;
2987: ReadHostTable;
2988:
2989: foreach my $child (keys %children) {
2990: my $childip = $children{$child};
2991: if(!$hostid{$childip}) {
2992: logthis('<font color="blue"> UpdateHosts killing child '
2993: ." $child for ip $childip </font>");
2994: kill('INT', $child);
2995: } else {
2996: logthis('<font color="green"> keeping child for ip '
2997: ." $childip (pid=$child) </font>");
2998: }
2999: }
3000: ReloadApache;
3001: &status("Finished reloading hosts.tab");
3002: }
3003:
3004:
3005: sub checkchildren {
3006: &status("Checking on the children (sending signals)");
3007: &initnewstatus();
3008: &logstatus();
3009: &logthis('Going to check on the children');
3010: my $docdir=$perlvar{'lonDocRoot'};
3011: foreach (sort keys %children) {
3012: sleep 1;
3013: unless (kill 'USR1' => $_) {
3014: &logthis ('Child '.$_.' is dead');
3015: &logstatus($$.' is dead');
3016: }
3017: }
3018: sleep 5;
3019: $SIG{ALRM} = sub { Debug("timeout");
3020: die "timeout"; };
3021: $SIG{__DIE__} = 'DEFAULT';
3022: &status("Checking on the children (waiting for reports)");
3023: foreach (sort keys %children) {
3024: unless (-e "$docdir/lon-status/londchld/$_.txt") {
3025: eval {
3026: alarm(300);
3027: &logthis('Child '.$_.' did not respond');
3028: kill 9 => $_;
3029: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
3030: #$subj="LON: $currenthostid killed lond process $_";
3031: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
3032: #$execdir=$perlvar{'lonDaemons'};
3033: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
3034: alarm(0);
3035: }
3036: }
3037: }
3038: $SIG{ALRM} = 'DEFAULT';
3039: $SIG{__DIE__} = \&catchexception;
3040: &status("Finished checking children");
3041: }
3042:
3043: # --------------------------------------------------------------------- Logging
3044:
3045: sub logthis {
3046: my $message=shift;
3047: my $execdir=$perlvar{'lonDaemons'};
3048: my $fh=IO::File->new(">>$execdir/logs/lond.log");
3049: my $now=time;
3050: my $local=localtime($now);
3051: $lastlog=$local.': '.$message;
3052: print $fh "$local ($$): $message\n";
3053: }
3054:
3055: # ------------------------- Conditional log if $DEBUG true.
3056: sub Debug {
3057: my $message = shift;
3058: if($DEBUG) {
3059: &logthis($message);
3060: }
3061: }
3062:
3063: #
3064: # Sub to do replies to client.. this gives a hook for some
3065: # debug tracing too:
3066: # Parameters:
3067: # fd - File open on client.
3068: # reply - Text to send to client.
3069: # request - Original request from client.
3070: #
3071: sub Reply {
3072: alarm(120);
3073: my $fd = shift;
3074: my $reply = shift;
3075: my $request = shift;
3076:
3077: my ($fd, $reply, $request) = @_;
3078: print $fd $reply;
3079: Debug("Request was $request Reply was $reply");
3080:
3081: $Transactions++;
3082: alarm(0);
3083:
3084:
3085: }
3086:
3087:
3088: #
3089: # Sub to report a failure.
3090: # This function:
3091: # - Increments the failure statistic counters.
3092: # - Invokes Reply to send the error message to the client.
3093: # Parameters:
3094: # fd - File descriptor open on the client
3095: # reply - Reply text to emit.
3096: # request - The original request message (used by Reply
3097: # to debug if that's enabled.
3098: # Implicit outputs:
3099: # $Failures- The number of failures is incremented.
3100: # Reply (invoked here) sends a message to the
3101: # client:
3102: #
3103: sub Failure {
3104: my $fd = shift;
3105: my $reply = shift;
3106: my $request = shift;
3107:
3108: $Failures++;
3109: Reply($fd, $reply, $request); # That's simple eh?
3110: }
3111: # ------------------------------------------------------------------ Log status
3112:
3113: sub logstatus {
3114: &status("Doing logging");
3115: my $docdir=$perlvar{'lonDocRoot'};
3116: {
3117: my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");
3118: print $fh $$."\t".$clientname."\t".$currenthostid."\t"
3119: .$status."\t".$lastlog."\t $keymode\n";
3120: $fh->close();
3121: }
3122: &status("Finished londstatus.txt");
3123: {
3124: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
3125: print $fh $status."\n".$lastlog."\n".time."\n$keymode";
3126: $fh->close();
3127: }
3128: &status("Finished logging");
3129: }
3130:
3131: sub initnewstatus {
3132: my $docdir=$perlvar{'lonDocRoot'};
3133: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
3134: my $now=time;
3135: my $local=localtime($now);
3136: print $fh "LOND status $local - parent $$\n\n";
3137: opendir(DIR,"$docdir/lon-status/londchld");
3138: while (my $filename=readdir(DIR)) {
3139: unlink("$docdir/lon-status/londchld/$filename");
3140: }
3141: closedir(DIR);
3142: }
3143:
3144: # -------------------------------------------------------------- Status setting
3145:
3146: sub status {
3147: my $what=shift;
3148: my $now=time;
3149: my $local=localtime($now);
3150: $status=$local.': '.$what;
3151: $0='lond: '.$what.' '.$local;
3152: }
3153:
3154: # -------------------------------------------------------- Escape Special Chars
3155:
3156: sub escape {
3157: my $str=shift;
3158: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
3159: return $str;
3160: }
3161:
3162: # ----------------------------------------------------- Un-Escape Special Chars
3163:
3164: sub unescape {
3165: my $str=shift;
3166: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
3167: return $str;
3168: }
3169:
3170: # ----------------------------------------------------------- Send USR1 to lonc
3171:
3172: sub reconlonc {
3173: my $peerfile=shift;
3174: &logthis("Trying to reconnect for $peerfile");
3175: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
3176: if (my $fh=IO::File->new("$loncfile")) {
3177: my $loncpid=<$fh>;
3178: chomp($loncpid);
3179: if (kill 0 => $loncpid) {
3180: &logthis("lonc at pid $loncpid responding, sending USR1");
3181: kill USR1 => $loncpid;
3182: } else {
3183: &logthis(
3184: "<font color='red'>CRITICAL: "
3185: ."lonc at pid $loncpid not responding, giving up</font>");
3186: }
3187: } else {
3188: &logthis('<font color="red">CRITICAL: lonc not running, giving up</font>');
3189: }
3190: }
3191:
3192: # -------------------------------------------------- Non-critical communication
3193:
3194: sub subreply {
3195: my ($cmd,$server)=@_;
3196: my $peerfile="$perlvar{'lonSockDir'}/$server";
3197: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
3198: Type => SOCK_STREAM,
3199: Timeout => 10)
3200: or return "con_lost";
3201: print $sclient "$cmd\n";
3202: my $answer=<$sclient>;
3203: chomp($answer);
3204: if (!$answer) { $answer="con_lost"; }
3205: return $answer;
3206: }
3207:
3208: sub reply {
3209: my ($cmd,$server)=@_;
3210: my $answer;
3211: if ($server ne $currenthostid) {
3212: $answer=subreply($cmd,$server);
3213: if ($answer eq 'con_lost') {
3214: $answer=subreply("ping",$server);
3215: if ($answer ne $server) {
3216: &logthis("sub reply: answer != server answer is $answer, server is $server");
3217: &reconlonc("$perlvar{'lonSockDir'}/$server");
3218: }
3219: $answer=subreply($cmd,$server);
3220: }
3221: } else {
3222: $answer='self_reply';
3223: }
3224: return $answer;
3225: }
3226:
3227: # -------------------------------------------------------------- Talk to lonsql
3228:
3229: sub sqlreply {
3230: my ($cmd)=@_;
3231: my $answer=subsqlreply($cmd);
3232: if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }
3233: return $answer;
3234: }
3235:
3236: sub subsqlreply {
3237: my ($cmd)=@_;
3238: my $unixsock="mysqlsock";
3239: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
3240: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
3241: Type => SOCK_STREAM,
3242: Timeout => 10)
3243: or return "con_lost";
3244: print $sclient "$cmd\n";
3245: my $answer=<$sclient>;
3246: chomp($answer);
3247: if (!$answer) { $answer="con_lost"; }
3248: return $answer;
3249: }
3250:
3251: # -------------------------------------------- Return path to profile directory
3252:
3253: sub propath {
3254: my ($udom,$uname)=@_;
3255: $udom=~s/\W//g;
3256: $uname=~s/\W//g;
3257: my $subdir=$uname.'__';
3258: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
3259: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
3260: return $proname;
3261: }
3262:
3263: # --------------------------------------- Is this the home server of an author?
3264:
3265: sub ishome {
3266: my $author=shift;
3267: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
3268: my ($udom,$uname)=split(/\//,$author);
3269: my $proname=propath($udom,$uname);
3270: if (-e $proname) {
3271: return 'owner';
3272: } else {
3273: return 'not_owner';
3274: }
3275: }
3276:
3277: # ======================================================= Continue main program
3278: # ---------------------------------------------------- Fork once and dissociate
3279:
3280: my $fpid=fork;
3281: exit if $fpid;
3282: die "Couldn't fork: $!" unless defined ($fpid);
3283:
3284: POSIX::setsid() or die "Can't start new session: $!";
3285:
3286: # ------------------------------------------------------- Write our PID on disk
3287:
3288: my $execdir=$perlvar{'lonDaemons'};
3289: open (PIDSAVE,">$execdir/logs/lond.pid");
3290: print PIDSAVE "$$\n";
3291: close(PIDSAVE);
3292: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
3293: &status('Starting');
3294:
3295:
3296:
3297: # ----------------------------------------------------- Install signal handlers
3298:
3299:
3300: $SIG{CHLD} = \&REAPER;
3301: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
3302: $SIG{HUP} = \&HUPSMAN;
3303: $SIG{USR1} = \&checkchildren;
3304: $SIG{USR2} = \&UpdateHosts;
3305:
3306: # Read the host hashes:
3307:
3308: ReadHostTable;
3309:
3310: # --------------------------------------------------------------
3311: # Accept connections. When a connection comes in, it is validated
3312: # and if good, a child process is created to process transactions
3313: # along the connection.
3314:
3315: while (1) {
3316: &status('Starting accept');
3317: $client = $server->accept() or next;
3318: &status('Accepted '.$client.' off to spawn');
3319: make_new_child($client);
3320: &status('Finished spawning');
3321: }
3322:
3323: sub make_new_child {
3324: my $pid;
3325: # my $cipher; # Now global
3326: my $sigset;
3327:
3328: $client = shift;
3329: &status('Starting new child '.$client);
3330: &logthis('<font color="green"> Attempting to start child ('.$client.
3331: ")</font>");
3332: # block signal for fork
3333: $sigset = POSIX::SigSet->new(SIGINT);
3334: sigprocmask(SIG_BLOCK, $sigset)
3335: or die "Can't block SIGINT for fork: $!\n";
3336:
3337: die "fork: $!" unless defined ($pid = fork);
3338:
3339: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
3340: # connection liveness.
3341:
3342: #
3343: # Figure out who we're talking to so we can record the peer in
3344: # the pid hash.
3345: #
3346: my $caller = getpeername($client);
3347: my ($port,$iaddr);
3348: if (defined($caller) && length($caller) > 0) {
3349: ($port,$iaddr)=unpack_sockaddr_in($caller);
3350: } else {
3351: &logthis("Unable to determine who caller was, getpeername returned nothing");
3352: }
3353: if (defined($iaddr)) {
3354: $clientip = inet_ntoa($iaddr);
3355: Debug("Connected with $clientip");
3356: $clientdns = gethostbyaddr($iaddr, AF_INET);
3357: Debug("Connected with $clientdns by name");
3358: } else {
3359: &logthis("Unable to determine clientip");
3360: $clientip='Unavailable';
3361: }
3362:
3363: if ($pid) {
3364: # Parent records the child's birth and returns.
3365: sigprocmask(SIG_UNBLOCK, $sigset)
3366: or die "Can't unblock SIGINT for fork: $!\n";
3367: $children{$pid} = $clientip;
3368: &status('Started child '.$pid);
3369: return;
3370: } else {
3371: # Child can *not* return from this subroutine.
3372: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
3373: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
3374: #don't get intercepted
3375: $SIG{USR1}= \&logstatus;
3376: $SIG{ALRM}= \&timeout;
3377: $lastlog='Forked ';
3378: $status='Forked';
3379:
3380: # unblock signals
3381: sigprocmask(SIG_UNBLOCK, $sigset)
3382: or die "Can't unblock SIGINT for fork: $!\n";
3383:
3384: # my $tmpsnum=0; # Now global
3385: #---------------------------------------------------- kerberos 5 initialization
3386: &Authen::Krb5::init_context();
3387: &Authen::Krb5::init_ets();
3388:
3389: &status('Accepted connection');
3390: # =============================================================================
3391: # do something with the connection
3392: # -----------------------------------------------------------------------------
3393: # see if we know client and 'check' for spoof IP by ineffective challenge
3394:
3395: ReadManagerTable; # May also be a manager!!
3396:
3397: my $clientrec=($hostid{$clientip} ne undef);
3398: my $ismanager=($managers{$clientip} ne undef);
3399: $clientname = "[unknonwn]";
3400: if($clientrec) { # Establish client type.
3401: $ConnectionType = "client";
3402: $clientname = $hostid{$clientip};
3403: if($ismanager) {
3404: $ConnectionType = "both";
3405: }
3406: } else {
3407: $ConnectionType = "manager";
3408: $clientname = $managers{$clientip};
3409: }
3410: my $clientok;
3411:
3412: if ($clientrec || $ismanager) {
3413: &status("Waiting for init from $clientip $clientname");
3414: &logthis('<font color="yellow">INFO: Connection, '.
3415: $clientip.
3416: " ($clientname) connection type = $ConnectionType </font>" );
3417: &status("Connecting $clientip ($clientname))");
3418: my $remotereq=<$client>;
3419: chomp($remotereq);
3420: Debug("Got init: $remotereq");
3421: my $inikeyword = split(/:/, $remotereq);
3422: if ($remotereq =~ /^init/) {
3423: &sethost("sethost:$perlvar{'lonHostID'}");
3424: #
3425: # If the remote is attempting a local init... give that a try:
3426: #
3427: my ($i, $inittype) = split(/:/, $remotereq);
3428:
3429: # If the connection type is ssl, but I didn't get my
3430: # certificate files yet, then I'll drop back to
3431: # insecure (if allowed).
3432:
3433: if($inittype eq "ssl") {
3434: my ($ca, $cert) = lonssl::CertificateFile;
3435: my $kfile = lonssl::KeyFile;
3436: if((!$ca) ||
3437: (!$cert) ||
3438: (!$kfile)) {
3439: $inittype = ""; # This forces insecure attempt.
3440: &logthis("<font color=\"blue\"> Certificates not "
3441: ."installed -- trying insecure auth</font>");
3442: }
3443: else { # SSL certificates are in place so
3444: } # Leave the inittype alone.
3445: }
3446:
3447: if($inittype eq "local") {
3448: my $key = LocalConnection($client, $remotereq);
3449: if($key) {
3450: Debug("Got local key $key");
3451: $clientok = 1;
3452: my $cipherkey = pack("H32", $key);
3453: $cipher = new IDEA($cipherkey);
3454: print $client "ok:local\n";
3455: &logthis('<font color="green"'
3456: . "Successful local authentication </font>");
3457: $keymode = "local"
3458: } else {
3459: Debug("Failed to get local key");
3460: $clientok = 0;
3461: shutdown($client, 3);
3462: close $client;
3463: }
3464: } elsif ($inittype eq "ssl") {
3465: my $key = SSLConnection($client);
3466: if ($key) {
3467: $clientok = 1;
3468: my $cipherkey = pack("H32", $key);
3469: $cipher = new IDEA($cipherkey);
3470: &logthis('<font color="green">'
3471: ."Successfull ssl authentication with $clientname </font>");
3472: $keymode = "ssl";
3473:
3474: } else {
3475: $clientok = 0;
3476: close $client;
3477: }
3478:
3479: } else {
3480: my $ok = InsecureConnection($client);
3481: if($ok) {
3482: $clientok = 1;
3483: &logthis('<font color="green">'
3484: ."Successful insecure authentication with $clientname </font>");
3485: print $client "ok\n";
3486: $keymode = "insecure";
3487: } else {
3488: &logthis('<font color="yellow">'
3489: ."Attempted insecure connection disallowed </font>");
3490: close $client;
3491: $clientok = 0;
3492:
3493: }
3494: }
3495: } else {
3496: &logthis(
3497: "<font color='blue'>WARNING: "
3498: ."$clientip failed to initialize: >$remotereq< </font>");
3499: &status('No init '.$clientip);
3500: }
3501:
3502: } else {
3503: &logthis(
3504: "<font color='blue'>WARNING: Unknown client $clientip</font>");
3505: &status('Hung up on '.$clientip);
3506: }
3507:
3508: if ($clientok) {
3509: # ---------------- New known client connecting, could mean machine online again
3510:
3511: foreach my $id (keys(%hostip)) {
3512: if ($hostip{$id} ne $clientip ||
3513: $hostip{$currenthostid} eq $clientip) {
3514: # no need to try to do recon's to myself
3515: next;
3516: }
3517: &reconlonc("$perlvar{'lonSockDir'}/$id");
3518: }
3519: &logthis("<font color='green'>Established connection: $clientname</font>");
3520: &status('Will listen to '.$clientname);
3521: # ------------------------------------------------------------ Process requests
3522: my $keep_going = 1;
3523: my $user_input;
3524: while(($user_input = get_request) && $keep_going) {
3525: alarm(120);
3526: Debug("Main: Got $user_input\n");
3527: $keep_going = &process_request($user_input);
3528: alarm(0);
3529: &status('Listening to '.$clientname." ($keymode)");
3530: }
3531:
3532: # --------------------------------------------- client unknown or fishy, refuse
3533: } else {
3534: print $client "refused\n";
3535: $client->close();
3536: &logthis("<font color='blue'>WARNING: "
3537: ."Rejected client $clientip, closing connection</font>");
3538: }
3539: }
3540:
3541: # =============================================================================
3542:
3543: &logthis("<font color='red'>CRITICAL: "
3544: ."Disconnect from $clientip ($clientname)</font>");
3545:
3546:
3547: # this exit is VERY important, otherwise the child will become
3548: # a producer of more and more children, forking yourself into
3549: # process death.
3550: exit;
3551:
3552: }
3553:
3554:
3555: #
3556: # Checks to see if the input roleput request was to set
3557: # an author role. If so, invokes the lchtmldir script to set
3558: # up a correct public_html
3559: # Parameters:
3560: # request - The request sent to the rolesput subchunk.
3561: # We're looking for /domain/_au
3562: # domain - The domain in which the user is having roles doctored.
3563: # user - Name of the user for which the role is being put.
3564: # authtype - The authentication type associated with the user.
3565: #
3566: sub ManagePermissions
3567: {
3568:
3569: my ($request, $domain, $user, $authtype) = @_;
3570:
3571: # See if the request is of the form /$domain/_au
3572: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
3573: my $execdir = $perlvar{'lonDaemons'};
3574: my $userhome= "/home/$user" ;
3575: &logthis("system $execdir/lchtmldir $userhome $user $authtype");
3576: system("$execdir/lchtmldir $userhome $user $authtype");
3577: }
3578: }
3579: #
3580: # GetAuthType - Determines the authorization type of a user in a domain.
3581:
3582: # Returns the authorization type or nouser if there is no such user.
3583: #
3584: sub GetAuthType
3585: {
3586:
3587: my ($domain, $user) = @_;
3588:
3589: Debug("GetAuthType( $domain, $user ) \n");
3590: my $proname = &propath($domain, $user);
3591: my $passwdfile = "$proname/passwd";
3592: if( -e $passwdfile ) {
3593: my $pf = IO::File->new($passwdfile);
3594: my $realpassword = <$pf>;
3595: chomp($realpassword);
3596: Debug("Password info = $realpassword\n");
3597: my ($authtype, $contentpwd) = split(/:/, $realpassword);
3598: Debug("Authtype = $authtype, content = $contentpwd\n");
3599: my $availinfo = '';
3600: if($authtype eq 'krb4' or $authtype eq 'krb5') {
3601: $availinfo = $contentpwd;
3602: }
3603:
3604: return "$authtype:$availinfo";
3605: }
3606: else {
3607: Debug("Returning nouser");
3608: return "nouser";
3609: }
3610: }
3611:
3612: sub addline {
3613: my ($fname,$hostid,$ip,$newline)=@_;
3614: my $contents;
3615: my $found=0;
3616: my $expr='^'.$hostid.':'.$ip.':';
3617: $expr =~ s/\./\\\./g;
3618: my $sh;
3619: if ($sh=IO::File->new("$fname.subscription")) {
3620: while (my $subline=<$sh>) {
3621: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
3622: }
3623: $sh->close();
3624: }
3625: $sh=IO::File->new(">$fname.subscription");
3626: if ($contents) { print $sh $contents; }
3627: if ($newline) { print $sh $newline; }
3628: $sh->close();
3629: return $found;
3630: }
3631:
3632: sub getchat {
3633: my ($cdom,$cname,$udom,$uname)=@_;
3634: my %hash;
3635: my $proname=&propath($cdom,$cname);
3636: my @entries=();
3637: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
3638: &GDBM_READER(),0640)) {
3639: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
3640: untie %hash;
3641: }
3642: my @participants=();
3643: my $cutoff=time-60;
3644: if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db",
3645: &GDBM_WRCREAT(),0640)) {
3646: $hash{$uname.':'.$udom}=time;
3647: foreach (sort keys %hash) {
3648: if ($hash{$_}>$cutoff) {
3649: $participants[$#participants+1]='active_participant:'.$_;
3650: }
3651: }
3652: untie %hash;
3653: }
3654: return (@participants,@entries);
3655: }
3656:
3657: sub chatadd {
3658: my ($cdom,$cname,$newchat)=@_;
3659: my %hash;
3660: my $proname=&propath($cdom,$cname);
3661: my @entries=();
3662: my $time=time;
3663: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
3664: &GDBM_WRCREAT(),0640)) {
3665: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
3666: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
3667: my ($thentime,$idnum)=split(/\_/,$lastid);
3668: my $newid=$time.'_000000';
3669: if ($thentime==$time) {
3670: $idnum=~s/^0+//;
3671: $idnum++;
3672: $idnum=substr('000000'.$idnum,-6,6);
3673: $newid=$time.'_'.$idnum;
3674: }
3675: $hash{$newid}=$newchat;
3676: my $expired=$time-3600;
3677: foreach (keys %hash) {
3678: my ($thistime)=($_=~/(\d+)\_/);
3679: if ($thistime<$expired) {
3680: delete $hash{$_};
3681: }
3682: }
3683: untie %hash;
3684: }
3685: {
3686: my $hfh;
3687: if ($hfh=IO::File->new(">>$proname/chatroom.log")) {
3688: print $hfh "$time:".&unescape($newchat)."\n";
3689: }
3690: }
3691: }
3692:
3693: sub unsub {
3694: my ($fname,$clientip)=@_;
3695: my $result;
3696: my $unsubs = 0; # Number of successful unsubscribes:
3697:
3698:
3699: # An old way subscriptions were handled was to have a
3700: # subscription marker file:
3701:
3702: Debug("Attempting unlink of $fname.$clientname");
3703: if (unlink("$fname.$clientname")) {
3704: $unsubs++; # Successful unsub via marker file.
3705: }
3706:
3707: # The more modern way to do it is to have a subscription list
3708: # file:
3709:
3710: if (-e "$fname.subscription") {
3711: my $found=&addline($fname,$clientname,$clientip,'');
3712: if ($found) {
3713: $unsubs++;
3714: }
3715: }
3716:
3717: # If either or both of these mechanisms succeeded in unsubscribing a
3718: # resource we can return ok:
3719:
3720: if($unsubs) {
3721: $result = "ok\n";
3722: } else {
3723: $result = "not_subscribed\n";
3724: }
3725:
3726: return $result;
3727: }
3728:
3729: sub currentversion {
3730: my $fname=shift;
3731: my $version=-1;
3732: my $ulsdir='';
3733: if ($fname=~/^(.+)\/[^\/]+$/) {
3734: $ulsdir=$1;
3735: }
3736: my ($fnamere1,$fnamere2);
3737: # remove version if already specified
3738: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
3739: # get the bits that go before and after the version number
3740: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
3741: $fnamere1=$1;
3742: $fnamere2='.'.$2;
3743: }
3744: if (-e $fname) { $version=1; }
3745: if (-e $ulsdir) {
3746: if(-d $ulsdir) {
3747: if (opendir(LSDIR,$ulsdir)) {
3748: my $ulsfn;
3749: while ($ulsfn=readdir(LSDIR)) {
3750: # see if this is a regular file (ignore links produced earlier)
3751: my $thisfile=$ulsdir.'/'.$ulsfn;
3752: unless (-l $thisfile) {
3753: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
3754: if ($1>$version) { $version=$1; }
3755: }
3756: }
3757: }
3758: closedir(LSDIR);
3759: $version++;
3760: }
3761: }
3762: }
3763: return $version;
3764: }
3765:
3766: sub thisversion {
3767: my $fname=shift;
3768: my $version=-1;
3769: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
3770: $version=$1;
3771: }
3772: return $version;
3773: }
3774:
3775: sub subscribe {
3776: my ($userinput,$clientip)=@_;
3777: my $result;
3778: my ($cmd,$fname)=split(/:/,$userinput);
3779: my $ownership=&ishome($fname);
3780: if ($ownership eq 'owner') {
3781: # explitly asking for the current version?
3782: unless (-e $fname) {
3783: my $currentversion=¤tversion($fname);
3784: if (&thisversion($fname)==$currentversion) {
3785: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
3786: my $root=$1;
3787: my $extension=$2;
3788: symlink($root.'.'.$extension,
3789: $root.'.'.$currentversion.'.'.$extension);
3790: unless ($extension=~/\.meta$/) {
3791: symlink($root.'.'.$extension.'.meta',
3792: $root.'.'.$currentversion.'.'.$extension.'.meta');
3793: }
3794: }
3795: }
3796: }
3797: if (-e $fname) {
3798: if (-d $fname) {
3799: $result="directory\n";
3800: } else {
3801: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
3802: my $now=time;
3803: my $found=&addline($fname,$clientname,$clientip,
3804: "$clientname:$clientip:$now\n");
3805: if ($found) { $result="$fname\n"; }
3806: # if they were subscribed to only meta data, delete that
3807: # subscription, when you subscribe to a file you also get
3808: # the metadata
3809: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
3810: $fname=~s/\/home\/httpd\/html\/res/raw/;
3811: $fname="http://$thisserver/".$fname;
3812: $result="$fname\n";
3813: }
3814: } else {
3815: $result="not_found\n";
3816: }
3817: } else {
3818: $result="rejected\n";
3819: }
3820: return $result;
3821: }
3822:
3823: sub make_passwd_file {
3824: my ($uname, $umode,$npass,$passfilename)=@_;
3825: my $result="ok\n";
3826: if ($umode eq 'krb4' or $umode eq 'krb5') {
3827: {
3828: my $pf = IO::File->new(">$passfilename");
3829: print $pf "$umode:$npass\n";
3830: }
3831: } elsif ($umode eq 'internal') {
3832: my $salt=time;
3833: $salt=substr($salt,6,2);
3834: my $ncpass=crypt($npass,$salt);
3835: {
3836: &Debug("Creating internal auth");
3837: my $pf = IO::File->new(">$passfilename");
3838: print $pf "internal:$ncpass\n";
3839: }
3840: } elsif ($umode eq 'localauth') {
3841: {
3842: my $pf = IO::File->new(">$passfilename");
3843: print $pf "localauth:$npass\n";
3844: }
3845: } elsif ($umode eq 'unix') {
3846: {
3847: #
3848: # Don't allow the creation of privileged accounts!!! that would
3849: # be real bad!!!
3850: #
3851: my $uid = getpwnam($uname);
3852: if((defined $uid) && ($uid == 0)) {
3853: &logthis(">>>Attempted to create privilged account blocked");
3854: return "no_priv_account_error\n";
3855: }
3856:
3857: my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
3858: {
3859: &Debug("Executing external: ".$execpath);
3860: &Debug("user = ".$uname.", Password =". $npass);
3861: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
3862: print $se "$uname\n";
3863: print $se "$npass\n";
3864: print $se "$npass\n";
3865: }
3866: my $useraddok = $?;
3867: if($useraddok > 0) {
3868: &logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));
3869: }
3870: my $pf = IO::File->new(">$passfilename");
3871: print $pf "unix:\n";
3872: }
3873: } elsif ($umode eq 'none') {
3874: {
3875: my $pf = IO::File->new(">$passfilename");
3876: print $pf "none:\n";
3877: }
3878: } else {
3879: $result="auth_mode_error\n";
3880: }
3881: return $result;
3882: }
3883:
3884: sub sethost {
3885: my ($remotereq) = @_;
3886: my (undef,$hostid)=split(/:/,$remotereq);
3887: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
3888: if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
3889: $currenthostid =$hostid;
3890: $currentdomainid=$hostdom{$hostid};
3891: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
3892: } else {
3893: &logthis("Requested host id $hostid not an alias of ".
3894: $perlvar{'lonHostID'}." refusing connection");
3895: return 'unable_to_set';
3896: }
3897: return 'ok';
3898: }
3899:
3900: sub version {
3901: my ($userinput)=@_;
3902: $remoteVERSION=(split(/:/,$userinput))[1];
3903: return "version:$VERSION";
3904: }
3905:
3906: #There is a copy of this in lonnet.pm
3907: sub userload {
3908: my $numusers=0;
3909: {
3910: opendir(LONIDS,$perlvar{'lonIDsDir'});
3911: my $filename;
3912: my $curtime=time;
3913: while ($filename=readdir(LONIDS)) {
3914: if ($filename eq '.' || $filename eq '..') {next;}
3915: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
3916: if ($curtime-$mtime < 1800) { $numusers++; }
3917: }
3918: closedir(LONIDS);
3919: }
3920: my $userloadpercent=0;
3921: my $maxuserload=$perlvar{'lonUserLoadLim'};
3922: if ($maxuserload) {
3923: $userloadpercent=100*$numusers/$maxuserload;
3924: }
3925: $userloadpercent=sprintf("%.2f",$userloadpercent);
3926: return $userloadpercent;
3927: }
3928:
3929: # Routines for serializing arrays and hashes (copies from lonnet)
3930:
3931: sub array2str {
3932: my (@array) = @_;
3933: my $result=&arrayref2str(\@array);
3934: $result=~s/^__ARRAY_REF__//;
3935: $result=~s/__END_ARRAY_REF__$//;
3936: return $result;
3937: }
3938:
3939: sub arrayref2str {
3940: my ($arrayref) = @_;
3941: my $result='__ARRAY_REF__';
3942: foreach my $elem (@$arrayref) {
3943: if(ref($elem) eq 'ARRAY') {
3944: $result.=&arrayref2str($elem).'&';
3945: } elsif(ref($elem) eq 'HASH') {
3946: $result.=&hashref2str($elem).'&';
3947: } elsif(ref($elem)) {
3948: #print("Got a ref of ".(ref($elem))." skipping.");
3949: } else {
3950: $result.=&escape($elem).'&';
3951: }
3952: }
3953: $result=~s/\&$//;
3954: $result .= '__END_ARRAY_REF__';
3955: return $result;
3956: }
3957:
3958: sub hash2str {
3959: my (%hash) = @_;
3960: my $result=&hashref2str(\%hash);
3961: $result=~s/^__HASH_REF__//;
3962: $result=~s/__END_HASH_REF__$//;
3963: return $result;
3964: }
3965:
3966: sub hashref2str {
3967: my ($hashref)=@_;
3968: my $result='__HASH_REF__';
3969: foreach (sort(keys(%$hashref))) {
3970: if (ref($_) eq 'ARRAY') {
3971: $result.=&arrayref2str($_).'=';
3972: } elsif (ref($_) eq 'HASH') {
3973: $result.=&hashref2str($_).'=';
3974: } elsif (ref($_)) {
3975: $result.='=';
3976: #print("Got a ref of ".(ref($_))." skipping.");
3977: } else {
3978: if ($_) {$result.=&escape($_).'=';} else { last; }
3979: }
3980:
3981: if(ref($hashref->{$_}) eq 'ARRAY') {
3982: $result.=&arrayref2str($hashref->{$_}).'&';
3983: } elsif(ref($hashref->{$_}) eq 'HASH') {
3984: $result.=&hashref2str($hashref->{$_}).'&';
3985: } elsif(ref($hashref->{$_})) {
3986: $result.='&';
3987: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
3988: } else {
3989: $result.=&escape($hashref->{$_}).'&';
3990: }
3991: }
3992: $result=~s/\&$//;
3993: $result .= '__END_HASH_REF__';
3994: return $result;
3995: }
3996:
3997: # ----------------------------------- POD (plain old documentation, CPAN style)
3998:
3999: =head1 NAME
4000:
4001: lond - "LON Daemon" Server (port "LOND" 5663)
4002:
4003: =head1 SYNOPSIS
4004:
4005: Usage: B<lond>
4006:
4007: Should only be run as user=www. This is a command-line script which
4008: is invoked by B<loncron>. There is no expectation that a typical user
4009: will manually start B<lond> from the command-line. (In other words,
4010: DO NOT START B<lond> YOURSELF.)
4011:
4012: =head1 DESCRIPTION
4013:
4014: There are two characteristics associated with the running of B<lond>,
4015: PROCESS MANAGEMENT (starting, stopping, handling child processes)
4016: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
4017: subscriptions, etc). These are described in two large
4018: sections below.
4019:
4020: B<PROCESS MANAGEMENT>
4021:
4022: Preforker - server who forks first. Runs as a daemon. HUPs.
4023: Uses IDEA encryption
4024:
4025: B<lond> forks off children processes that correspond to the other servers
4026: in the network. Management of these processes can be done at the
4027: parent process level or the child process level.
4028:
4029: B<logs/lond.log> is the location of log messages.
4030:
4031: The process management is now explained in terms of linux shell commands,
4032: subroutines internal to this code, and signal assignments:
4033:
4034: =over 4
4035:
4036: =item *
4037:
4038: PID is stored in B<logs/lond.pid>
4039:
4040: This is the process id number of the parent B<lond> process.
4041:
4042: =item *
4043:
4044: SIGTERM and SIGINT
4045:
4046: Parent signal assignment:
4047: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
4048:
4049: Child signal assignment:
4050: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
4051: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
4052: to restart a new child.)
4053:
4054: Command-line invocations:
4055: B<kill> B<-s> SIGTERM I<PID>
4056: B<kill> B<-s> SIGINT I<PID>
4057:
4058: Subroutine B<HUNTSMAN>:
4059: This is only invoked for the B<lond> parent I<PID>.
4060: This kills all the children, and then the parent.
4061: The B<lonc.pid> file is cleared.
4062:
4063: =item *
4064:
4065: SIGHUP
4066:
4067: Current bug:
4068: This signal can only be processed the first time
4069: on the parent process. Subsequent SIGHUP signals
4070: have no effect.
4071:
4072: Parent signal assignment:
4073: $SIG{HUP} = \&HUPSMAN;
4074:
4075: Child signal assignment:
4076: none (nothing happens)
4077:
4078: Command-line invocations:
4079: B<kill> B<-s> SIGHUP I<PID>
4080:
4081: Subroutine B<HUPSMAN>:
4082: This is only invoked for the B<lond> parent I<PID>,
4083: This kills all the children, and then the parent.
4084: The B<lond.pid> file is cleared.
4085:
4086: =item *
4087:
4088: SIGUSR1
4089:
4090: Parent signal assignment:
4091: $SIG{USR1} = \&USRMAN;
4092:
4093: Child signal assignment:
4094: $SIG{USR1}= \&logstatus;
4095:
4096: Command-line invocations:
4097: B<kill> B<-s> SIGUSR1 I<PID>
4098:
4099: Subroutine B<USRMAN>:
4100: When invoked for the B<lond> parent I<PID>,
4101: SIGUSR1 is sent to all the children, and the status of
4102: each connection is logged.
4103:
4104: =item *
4105:
4106: SIGUSR2
4107:
4108: Parent Signal assignment:
4109: $SIG{USR2} = \&UpdateHosts
4110:
4111: Child signal assignment:
4112: NONE
4113:
4114:
4115: =item *
4116:
4117: SIGCHLD
4118:
4119: Parent signal assignment:
4120: $SIG{CHLD} = \&REAPER;
4121:
4122: Child signal assignment:
4123: none
4124:
4125: Command-line invocations:
4126: B<kill> B<-s> SIGCHLD I<PID>
4127:
4128: Subroutine B<REAPER>:
4129: This is only invoked for the B<lond> parent I<PID>.
4130: Information pertaining to the child is removed.
4131: The socket port is cleaned up.
4132:
4133: =back
4134:
4135: B<SERVER-SIDE ACTIVITIES>
4136:
4137: Server-side information can be accepted in an encrypted or non-encrypted
4138: method.
4139:
4140: =over 4
4141:
4142: =item ping
4143:
4144: Query a client in the hosts.tab table; "Are you there?"
4145:
4146: =item pong
4147:
4148: Respond to a ping query.
4149:
4150: =item ekey
4151:
4152: Read in encrypted key, make cipher. Respond with a buildkey.
4153:
4154: =item load
4155:
4156: Respond with CPU load based on a computation upon /proc/loadavg.
4157:
4158: =item currentauth
4159:
4160: Reply with current authentication information (only over an
4161: encrypted channel).
4162:
4163: =item auth
4164:
4165: Only over an encrypted channel, reply as to whether a user's
4166: authentication information can be validated.
4167:
4168: =item passwd
4169:
4170: Allow for a password to be set.
4171:
4172: =item makeuser
4173:
4174: Make a user.
4175:
4176: =item passwd
4177:
4178: Allow for authentication mechanism and password to be changed.
4179:
4180: =item home
4181:
4182: Respond to a question "are you the home for a given user?"
4183:
4184: =item update
4185:
4186: Update contents of a subscribed resource.
4187:
4188: =item unsubscribe
4189:
4190: The server is unsubscribing from a resource.
4191:
4192: =item subscribe
4193:
4194: The server is subscribing to a resource.
4195:
4196: =item log
4197:
4198: Place in B<logs/lond.log>
4199:
4200: =item put
4201:
4202: stores hash in namespace
4203:
4204: =item rolesput
4205:
4206: put a role into a user's environment
4207:
4208: =item get
4209:
4210: returns hash with keys from array
4211: reference filled in from namespace
4212:
4213: =item eget
4214:
4215: returns hash with keys from array
4216: reference filled in from namesp (encrypts the return communication)
4217:
4218: =item rolesget
4219:
4220: get a role from a user's environment
4221:
4222: =item del
4223:
4224: deletes keys out of array from namespace
4225:
4226: =item keys
4227:
4228: returns namespace keys
4229:
4230: =item dump
4231:
4232: dumps the complete (or key matching regexp) namespace into a hash
4233:
4234: =item store
4235:
4236: stores hash permanently
4237: for this url; hashref needs to be given and should be a \%hashname; the
4238: remaining args aren't required and if they aren't passed or are '' they will
4239: be derived from the ENV
4240:
4241: =item restore
4242:
4243: returns a hash for a given url
4244:
4245: =item querysend
4246:
4247: Tells client about the lonsql process that has been launched in response
4248: to a sent query.
4249:
4250: =item queryreply
4251:
4252: Accept information from lonsql and make appropriate storage in temporary
4253: file space.
4254:
4255: =item idput
4256:
4257: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
4258: for each student, defined perhaps by the institutional Registrar.)
4259:
4260: =item idget
4261:
4262: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
4263: for each student, defined perhaps by the institutional Registrar.)
4264:
4265: =item tmpput
4266:
4267: Accept and store information in temporary space.
4268:
4269: =item tmpget
4270:
4271: Send along temporarily stored information.
4272:
4273: =item ls
4274:
4275: List part of a user's directory.
4276:
4277: =item pushtable
4278:
4279: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
4280: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
4281: must be restored manually in case of a problem with the new table file.
4282: pushtable requires that the request be encrypted and validated via
4283: ValidateManager. The form of the command is:
4284: enc:pushtable tablename <tablecontents> \n
4285: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
4286: cleartext newline.
4287:
4288: =item Hanging up (exit or init)
4289:
4290: What to do when a client tells the server that they (the client)
4291: are leaving the network.
4292:
4293: =item unknown command
4294:
4295: If B<lond> is sent an unknown command (not in the list above),
4296: it replys to the client "unknown_cmd".
4297:
4298:
4299: =item UNKNOWN CLIENT
4300:
4301: If the anti-spoofing algorithm cannot verify the client,
4302: the client is rejected (with a "refused" message sent
4303: to the client, and the connection is closed.
4304:
4305: =back
4306:
4307: =head1 PREREQUISITES
4308:
4309: IO::Socket
4310: IO::File
4311: Apache::File
4312: Symbol
4313: POSIX
4314: Crypt::IDEA
4315: LWP::UserAgent()
4316: GDBM_File
4317: Authen::Krb4
4318: Authen::Krb5
4319:
4320: =head1 COREQUISITES
4321:
4322: =head1 OSNAMES
4323:
4324: linux
4325:
4326: =head1 SCRIPT CATEGORIES
4327:
4328: Server/Process
4329:
4330: =cut
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