1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.218 2004/07/29 10:50:54 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: 1.218 $'; #' stupid emacs
60: my $remoteVERSION;
61: my $currenthostid="default";
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: #--------------------- Request Handlers --------------------------------------------
1037: #
1038: # By convention each request handler registers itself prior to the sub
1039: # declaration:
1040: #
1041:
1042: #++
1043: #
1044: # Handles ping requests.
1045: # Parameters:
1046: # $cmd - the actual keyword that invoked us.
1047: # $tail - the tail of the request that invoked us.
1048: # $replyfd- File descriptor connected to the client
1049: # Implicit Inputs:
1050: # $currenthostid - Global variable that carries the name of the host we are
1051: # known as.
1052: # Returns:
1053: # 1 - Ok to continue processing.
1054: # 0 - Program should exit.
1055: # Side effects:
1056: # Reply information is sent to the client.
1057:
1058: sub ping_handler {
1059: my ($cmd, $tail, $client) = @_;
1060: Debug("$cmd $tail $client .. $currenthostid:");
1061:
1062: Reply( $client,"$currenthostid\n","$cmd:$tail");
1063:
1064: return 1;
1065: }
1066: ®ister_handler("ping", \&ping_handler, 0, 1, 1); # Ping unencoded, client or manager.
1067:
1068: #++
1069: #
1070: # Handles pong requests. Pong replies with our current host id, and
1071: # the results of a ping sent to us via our lonc.
1072: #
1073: # Parameters:
1074: # $cmd - the actual keyword that invoked us.
1075: # $tail - the tail of the request that invoked us.
1076: # $replyfd- File descriptor connected to the client
1077: # Implicit Inputs:
1078: # $currenthostid - Global variable that carries the name of the host we are
1079: # connected to.
1080: # Returns:
1081: # 1 - Ok to continue processing.
1082: # 0 - Program should exit.
1083: # Side effects:
1084: # Reply information is sent to the client.
1085:
1086: sub pong_handler {
1087: my ($cmd, $tail, $replyfd) = @_;
1088:
1089: my $reply=&reply("ping",$clientname);
1090: &Reply( $replyfd, "$currenthostid:$reply\n", "$cmd:$tail");
1091: return 1;
1092: }
1093: ®ister_handler("pong", \&pong_handler, 0, 1, 1); # Pong unencoded, client or manager
1094:
1095: #++
1096: # Called to establish an encrypted session key with the remote client.
1097: # Note that with secure lond, in most cases this function is never
1098: # invoked. Instead, the secure session key is established either
1099: # via a local file that's locked down tight and only lives for a short
1100: # time, or via an ssl tunnel...and is generated from a bunch-o-random
1101: # bits from /dev/urandom, rather than the predictable pattern used by
1102: # by this sub. This sub is only used in the old-style insecure
1103: # key negotiation.
1104: # Parameters:
1105: # $cmd - the actual keyword that invoked us.
1106: # $tail - the tail of the request that invoked us.
1107: # $replyfd- File descriptor connected to the client
1108: # Implicit Inputs:
1109: # $currenthostid - Global variable that carries the name of the host
1110: # known as.
1111: # $clientname - Global variable that carries the name of the hsot we're connected to.
1112: # Returns:
1113: # 1 - Ok to continue processing.
1114: # 0 - Program should exit.
1115: # Implicit Outputs:
1116: # Reply information is sent to the client.
1117: # $cipher is set with a reference to a new IDEA encryption object.
1118: #
1119: sub establish_key_handler {
1120: my ($cmd, $tail, $replyfd) = @_;
1121:
1122: my $buildkey=time.$$.int(rand 100000);
1123: $buildkey=~tr/1-6/A-F/;
1124: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
1125: my $key=$currenthostid.$clientname;
1126: $key=~tr/a-z/A-Z/;
1127: $key=~tr/G-P/0-9/;
1128: $key=~tr/Q-Z/0-9/;
1129: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
1130: $key=substr($key,0,32);
1131: my $cipherkey=pack("H32",$key);
1132: $cipher=new IDEA $cipherkey;
1133: &Reply($replyfd, "$buildkey\n", "$cmd:$tail");
1134:
1135: return 1;
1136:
1137: }
1138: ®ister_handler("ekey", \&establish_key_handler, 0, 1,1);
1139:
1140:
1141: # Handler for the load command. Returns the current system load average
1142: # to the requestor.
1143: #
1144: # Parameters:
1145: # $cmd - the actual keyword that invoked us.
1146: # $tail - the tail of the request that invoked us.
1147: # $replyfd- File descriptor connected to the client
1148: # Implicit Inputs:
1149: # $currenthostid - Global variable that carries the name of the host
1150: # known as.
1151: # $clientname - Global variable that carries the name of the hsot we're connected to.
1152: # Returns:
1153: # 1 - Ok to continue processing.
1154: # 0 - Program should exit.
1155: # Side effects:
1156: # Reply information is sent to the client.
1157: sub load_handler {
1158: my ($cmd, $tail, $replyfd) = @_;
1159:
1160: # Get the load average from /proc/loadavg and calculate it as a percentage of
1161: # the allowed load limit as set by the perl global variable lonLoadLim
1162:
1163: my $loadavg;
1164: my $loadfile=IO::File->new('/proc/loadavg');
1165:
1166: $loadavg=<$loadfile>;
1167: $loadavg =~ s/\s.*//g; # Extract the first field only.
1168:
1169: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1170:
1171: &Reply( $replyfd, "$loadpercent\n", "$cmd:$tail");
1172:
1173: return 1;
1174: }
1175: register_handler("load", \&load_handler, 0, 1, 0);
1176:
1177: #
1178: # Process the userload request. This sub returns to the client the current
1179: # user load average. It can be invoked either by clients or managers.
1180: #
1181: # Parameters:
1182: # $cmd - the actual keyword that invoked us.
1183: # $tail - the tail of the request that invoked us.
1184: # $replyfd- File descriptor connected to the client
1185: # Implicit Inputs:
1186: # $currenthostid - Global variable that carries the name of the host
1187: # known as.
1188: # $clientname - Global variable that carries the name of the hsot we're connected to.
1189: # Returns:
1190: # 1 - Ok to continue processing.
1191: # 0 - Program should exit
1192: # Implicit inputs:
1193: # whatever the userload() function requires.
1194: # Implicit outputs:
1195: # the reply is written to the client.
1196: #
1197: sub user_load_handler {
1198: my ($cmd, $tail, $replyfd) = @_;
1199:
1200: my $userloadpercent=&userload();
1201: &Reply($replyfd, "$userloadpercent\n", "$cmd:$tail");
1202:
1203: return 1;
1204: }
1205: register_handler("userload", \&user_load_handler, 0, 1, 0);
1206:
1207: # Process a request for the authorization type of a user:
1208: # (userauth).
1209: #
1210: # Parameters:
1211: # $cmd - the actual keyword that invoked us.
1212: # $tail - the tail of the request that invoked us.
1213: # $replyfd- File descriptor connected to the client
1214: # Returns:
1215: # 1 - Ok to continue processing.
1216: # 0 - Program should exit
1217: # Implicit outputs:
1218: # The user authorization type is written to the client.
1219: #
1220: sub user_authorization_type {
1221: my ($cmd, $tail, $replyfd) = @_;
1222:
1223: my $userinput = "$cmd:$tail";
1224:
1225: # Pull the domain and username out of the command tail.
1226: # and call GetAuthType to determine the authentication type.
1227:
1228: my ($udom,$uname)=split(/:/,$tail);
1229: my $result = &GetAuthType($udom, $uname);
1230: if($result eq "nouser") {
1231: &Failure( $replyfd, "unknown_user\n", $userinput);
1232: } else {
1233: #
1234: # We only want to pass the second field from GetAuthType
1235: # for ^krb.. otherwise we'll be handing out the encrypted
1236: # password for internals e.g.
1237: #
1238: my ($type,$otherinfo) = split(/:/,$result);
1239: if($type =~ /^krb/) {
1240: $type = $result;
1241: }
1242: &Reply( $replyfd, "$type\n", $userinput);
1243: }
1244:
1245: return 1;
1246: }
1247: ®ister_handler("currentauth", \&user_authorization_type, 1, 1, 0);
1248:
1249: # Process a request by a manager to push a hosts or domain table
1250: # to us. We pick apart the command and pass it on to the subs
1251: # that already exist to do this.
1252: #
1253: # Parameters:
1254: # $cmd - the actual keyword that invoked us.
1255: # $tail - the tail of the request that invoked us.
1256: # $client - File descriptor connected to the client
1257: # Returns:
1258: # 1 - Ok to continue processing.
1259: # 0 - Program should exit
1260: # Implicit Output:
1261: # a reply is written to the client.
1262:
1263: sub push_file_handler {
1264: my ($cmd, $tail, $client) = @_;
1265:
1266: my $userinput = "$cmd:$tail";
1267:
1268: # At this time we only know that the IP of our partner is a valid manager
1269: # the code below is a hook to do further authentication (e.g. to resolve
1270: # spoofing).
1271:
1272: my $cert = &GetCertificate($userinput);
1273: if(&ValidManager($cert)) {
1274:
1275: # Now presumably we have the bona fides of both the peer host and the
1276: # process making the request.
1277:
1278: my $reply = &PushFile($userinput);
1279: &Reply($client, "$reply\n", $userinput);
1280:
1281: } else {
1282: &Failure( $client, "refused\n", $userinput);
1283: }
1284: }
1285: ®ister_handler("pushfile", \&push_file_handler, 1, 0, 1);
1286:
1287:
1288:
1289: # Process a reinit request. Reinit requests that either
1290: # lonc or lond be reinitialized so that an updated
1291: # host.tab or domain.tab can be processed.
1292: #
1293: # Parameters:
1294: # $cmd - the actual keyword that invoked us.
1295: # $tail - the tail of the request that invoked us.
1296: # $client - File descriptor connected to the client
1297: # Returns:
1298: # 1 - Ok to continue processing.
1299: # 0 - Program should exit
1300: # Implicit output:
1301: # a reply is sent to the client.
1302: #
1303: sub reinit_process_handler {
1304: my ($cmd, $tail, $client) = @_;
1305:
1306: my $userinput = "$cmd:$tail";
1307:
1308: my $cert = &GetCertificate($userinput);
1309: if(&ValidManager($cert)) {
1310: chomp($userinput);
1311: my $reply = &ReinitProcess($userinput);
1312: &Reply( $client, "$reply\n", $userinput);
1313: } else {
1314: &Failure( $client, "refused\n", $userinput);
1315: }
1316: return 1;
1317: }
1318:
1319: ®ister_handler("reinit", \&reinit_process_handler, 1, 0, 1);
1320:
1321: # Process the editing script for a table edit operation.
1322: # the editing operation must be encrypted and requested by
1323: # a manager host.
1324: #
1325: # Parameters:
1326: # $cmd - the actual keyword that invoked us.
1327: # $tail - the tail of the request that invoked us.
1328: # $client - File descriptor connected to the client
1329: # Returns:
1330: # 1 - Ok to continue processing.
1331: # 0 - Program should exit
1332: # Implicit output:
1333: # a reply is sent to the client.
1334: #
1335: sub edit_table_handler {
1336: my ($command, $tail, $client) = @_;
1337:
1338: my $userinput = "$command:$tail";
1339:
1340: my $cert = &GetCertificate($userinput);
1341: if(&ValidManager($cert)) {
1342: my($filetype, $script) = split(/:/, $tail);
1343: if (($filetype eq "hosts") ||
1344: ($filetype eq "domain")) {
1345: if($script ne "") {
1346: &Reply($client, # BUGBUG - EditFile
1347: &EditFile($userinput), # could fail.
1348: $userinput);
1349: } else {
1350: &Failure($client,"refused\n",$userinput);
1351: }
1352: } else {
1353: &Failure($client,"refused\n",$userinput);
1354: }
1355: } else {
1356: &Failure($client,"refused\n",$userinput);
1357: }
1358: return 1;
1359: }
1360: register_handler("edit", \&edit_table_handler, 1, 0, 1);
1361:
1362:
1363:
1364:
1365: #---------------------------------------------------------------
1366: #
1367: # Getting, decoding and dispatching requests:
1368: #
1369:
1370: #
1371: # Get a Request:
1372: # Gets a Request message from the client. The transaction
1373: # is defined as a 'line' of text. We remove the new line
1374: # from the text line.
1375: #
1376: sub get_request {
1377: my $input = <$client>;
1378: chomp($input);
1379:
1380: Debug("get_request: Request = $input\n");
1381:
1382: &status('Processing '.$clientname.':'.$input);
1383:
1384: return $input;
1385: }
1386: #---------------------------------------------------------------
1387: #
1388: # Process a request. This sub should shrink as each action
1389: # gets farmed out into a separat sub that is registered
1390: # with the dispatch hash.
1391: #
1392: # Parameters:
1393: # user_input - The request received from the client (lonc).
1394: # Returns:
1395: # true to keep processing, false if caller should exit.
1396: #
1397: sub process_request {
1398: my ($userinput) = @_; # Easier for now to break style than to
1399: # fix all the userinput -> user_input.
1400: my $wasenc = 0; # True if request was encrypted.
1401: # ------------------------------------------------------------ See if encrypted
1402: if ($userinput =~ /^enc/) {
1403: $userinput = decipher($userinput);
1404: $wasenc=1;
1405: if(!$userinput) { # Cipher not defined.
1406: &Failure($client, "error: Encrypted data without negotated key");
1407: return 0;
1408: }
1409: }
1410: Debug("process_request: $userinput\n");
1411:
1412: #
1413: # The 'correct way' to add a command to lond is now to
1414: # write a sub to execute it and Add it to the command dispatch
1415: # hash via a call to register_handler.. The comments to that
1416: # sub should give you enough to go on to show how to do this
1417: # along with the examples that are building up as this code
1418: # is getting refactored. Until all branches of the
1419: # if/elseif monster below have been factored out into
1420: # separate procesor subs, if the dispatch hash is missing
1421: # the command keyword, we will fall through to the remainder
1422: # of the if/else chain below in order to keep this thing in
1423: # working order throughout the transmogrification.
1424:
1425: my ($command, $tail) = split(/:/, $userinput, 2);
1426: chomp($command);
1427: chomp($tail);
1428: $tail =~ s/(\r)//; # This helps people debugging with e.g. telnet.
1429: $command =~ s/(\r)//; # And this too for parameterless commands.
1430: if(!$tail) {
1431: $tail =""; # defined but blank.
1432: }
1433:
1434: &Debug("Command received: $command, encoded = $wasenc");
1435:
1436: if(defined $Dispatcher{$command}) {
1437:
1438: my $dispatch_info = $Dispatcher{$command};
1439: my $handler = $$dispatch_info[0];
1440: my $need_encode = $$dispatch_info[1];
1441: my $client_types = $$dispatch_info[2];
1442: Debug("Matched dispatch hash: mustencode: $need_encode "
1443: ."ClientType $client_types");
1444:
1445: # Validate the request:
1446:
1447: my $ok = 1;
1448: my $requesterprivs = 0;
1449: if(&isClient()) {
1450: $requesterprivs |= $CLIENT_OK;
1451: }
1452: if(&isManager()) {
1453: $requesterprivs |= $MANAGER_OK;
1454: }
1455: if($need_encode && (!$wasenc)) {
1456: Debug("Must encode but wasn't: $need_encode $wasenc");
1457: $ok = 0;
1458: }
1459: if(($client_types & $requesterprivs) == 0) {
1460: Debug("Client not privileged to do this operation");
1461: $ok = 0;
1462: }
1463:
1464: if($ok) {
1465: Debug("Dispatching to handler $command $tail");
1466: my $keep_going = &$handler($command, $tail, $client);
1467: return $keep_going;
1468: } else {
1469: Debug("Refusing to dispatch because client did not match requirements");
1470: Failure($client, "refused\n", $userinput);
1471: return 1;
1472: }
1473:
1474: }
1475:
1476: #------------------- Commands not yet in spearate handlers. --------------
1477:
1478:
1479: # ------------------------------------------------------------------------ auth
1480: if ($userinput =~ /^auth/) { # Encoded and client only.
1481: if (($wasenc==1) && isClient) {
1482: my ($cmd,$udom,$uname,$upass)=split(/:/,$userinput);
1483: chomp($upass);
1484: $upass=unescape($upass);
1485: my $proname=propath($udom,$uname);
1486: my $passfilename="$proname/passwd";
1487: if (-e $passfilename) {
1488: my $pf = IO::File->new($passfilename);
1489: my $realpasswd=<$pf>;
1490: chomp($realpasswd);
1491: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1492: my $pwdcorrect=0;
1493: if ($howpwd eq 'internal') {
1494: &Debug("Internal auth");
1495: $pwdcorrect=
1496: (crypt($upass,$contentpwd) eq $contentpwd);
1497: } elsif ($howpwd eq 'unix') {
1498: &Debug("Unix auth");
1499: if((getpwnam($uname))[1] eq "") { #no such user!
1500: $pwdcorrect = 0;
1501: } else {
1502: $contentpwd=(getpwnam($uname))[1];
1503: my $pwauth_path="/usr/local/sbin/pwauth";
1504: unless ($contentpwd eq 'x') {
1505: $pwdcorrect=
1506: (crypt($upass,$contentpwd) eq
1507: $contentpwd);
1508: }
1509:
1510: elsif (-e $pwauth_path) {
1511: open PWAUTH, "|$pwauth_path" or
1512: die "Cannot invoke authentication";
1513: print PWAUTH "$uname\n$upass\n";
1514: close PWAUTH;
1515: $pwdcorrect=!$?;
1516: }
1517: }
1518: } elsif ($howpwd eq 'krb4') {
1519: my $null=pack("C",0);
1520: unless ($upass=~/$null/) {
1521: my $krb4_error = &Authen::Krb4::get_pw_in_tkt
1522: ($uname,"",$contentpwd,'krbtgt',
1523: $contentpwd,1,$upass);
1524: if (!$krb4_error) {
1525: $pwdcorrect = 1;
1526: } else {
1527: $pwdcorrect=0;
1528: # log error if it is not a bad password
1529: if ($krb4_error != 62) {
1530: &logthis('krb4:'.$uname.','.
1531: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
1532: }
1533: }
1534: }
1535: } elsif ($howpwd eq 'krb5') {
1536: my $null=pack("C",0);
1537: unless ($upass=~/$null/) {
1538: my $krbclient=&Authen::Krb5::parse_name($uname.'@'.$contentpwd);
1539: my $krbservice="krbtgt/".$contentpwd."\@".$contentpwd;
1540: my $krbserver=&Authen::Krb5::parse_name($krbservice);
1541: my $credentials=&Authen::Krb5::cc_default();
1542: $credentials->initialize($krbclient);
1543: my $krbreturn =
1544: &Authen::Krb5::get_in_tkt_with_password(
1545: $krbclient,$krbserver,$upass,$credentials);
1546: # unless ($krbreturn) {
1547: # &logthis("Krb5 Error: ".
1548: # &Authen::Krb5::error());
1549: # }
1550: $pwdcorrect = ($krbreturn == 1);
1551: } else { $pwdcorrect=0; }
1552: } elsif ($howpwd eq 'localauth') {
1553: $pwdcorrect=&localauth::localauth($uname,$upass,
1554: $contentpwd);
1555: }
1556: if ($pwdcorrect) {
1557: print $client "authorized\n";
1558: } else {
1559: print $client "non_authorized\n";
1560: }
1561: } else {
1562: print $client "unknown_user\n";
1563: }
1564: } else {
1565: Reply($client, "refused\n", $userinput);
1566:
1567: }
1568: # ---------------------------------------------------------------------- passwd
1569: } elsif ($userinput =~ /^passwd/) { # encoded and client
1570: if (($wasenc==1) && isClient) {
1571: my
1572: ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
1573: chomp($npass);
1574: $upass=&unescape($upass);
1575: $npass=&unescape($npass);
1576: &Debug("Trying to change password for $uname");
1577: my $proname=propath($udom,$uname);
1578: my $passfilename="$proname/passwd";
1579: if (-e $passfilename) {
1580: my $realpasswd;
1581: { my $pf = IO::File->new($passfilename);
1582: $realpasswd=<$pf>; }
1583: chomp($realpasswd);
1584: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1585: if ($howpwd eq 'internal') {
1586: &Debug("internal auth");
1587: if (crypt($upass,$contentpwd) eq $contentpwd) {
1588: my $salt=time;
1589: $salt=substr($salt,6,2);
1590: my $ncpass=crypt($npass,$salt);
1591: {
1592: my $pf;
1593: if ($pf = IO::File->new(">$passfilename")) {
1594: print $pf "internal:$ncpass\n";
1595: &logthis("Result of password change for $uname: pwchange_success");
1596: print $client "ok\n";
1597: } else {
1598: &logthis("Unable to open $uname passwd to change password");
1599: print $client "non_authorized\n";
1600: }
1601: }
1602:
1603: } else {
1604: print $client "non_authorized\n";
1605: }
1606: } elsif ($howpwd eq 'unix') {
1607: # Unix means we have to access /etc/password
1608: # one way or another.
1609: # First: Make sure the current password is
1610: # correct
1611: &Debug("auth is unix");
1612: $contentpwd=(getpwnam($uname))[1];
1613: my $pwdcorrect = "0";
1614: my $pwauth_path="/usr/local/sbin/pwauth";
1615: unless ($contentpwd eq 'x') {
1616: $pwdcorrect=
1617: (crypt($upass,$contentpwd) eq $contentpwd);
1618: } elsif (-e $pwauth_path) {
1619: open PWAUTH, "|$pwauth_path" or
1620: die "Cannot invoke authentication";
1621: print PWAUTH "$uname\n$upass\n";
1622: close PWAUTH;
1623: &Debug("exited pwauth with $? ($uname,$upass) ");
1624: $pwdcorrect=($? == 0);
1625: }
1626: if ($pwdcorrect) {
1627: my $execdir=$perlvar{'lonDaemons'};
1628: &Debug("Opening lcpasswd pipeline");
1629: my $pf = IO::File->new("|$execdir/lcpasswd > $perlvar{'lonDaemons'}/logs/lcpasswd.log");
1630: print $pf "$uname\n$npass\n$npass\n";
1631: close $pf;
1632: my $err = $?;
1633: my $result = ($err>0 ? 'pwchange_failure'
1634: : 'ok');
1635: &logthis("Result of password change for $uname: ".
1636: &lcpasswdstrerror($?));
1637: print $client "$result\n";
1638: } else {
1639: print $client "non_authorized\n";
1640: }
1641: } else {
1642: print $client "auth_mode_error\n";
1643: }
1644: } else {
1645: print $client "unknown_user\n";
1646: }
1647: } else {
1648: Reply($client, "refused\n", $userinput);
1649:
1650: }
1651: # -------------------------------------------------------------------- makeuser
1652: } elsif ($userinput =~ /^makeuser/) { # encoded and client.
1653: &Debug("Make user received");
1654: my $oldumask=umask(0077);
1655: if (($wasenc==1) && isClient) {
1656: my
1657: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
1658: &Debug("cmd =".$cmd." $udom =".$udom.
1659: " uname=".$uname);
1660: chomp($npass);
1661: $npass=&unescape($npass);
1662: my $proname=propath($udom,$uname);
1663: my $passfilename="$proname/passwd";
1664: &Debug("Password file created will be:".
1665: $passfilename);
1666: if (-e $passfilename) {
1667: print $client "already_exists\n";
1668: } elsif ($udom ne $currentdomainid) {
1669: print $client "not_right_domain\n";
1670: } else {
1671: my @fpparts=split(/\//,$proname);
1672: my $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
1673: my $fperror='';
1674: for (my $i=3;$i<=$#fpparts;$i++) {
1675: $fpnow.='/'.$fpparts[$i];
1676: unless (-e $fpnow) {
1677: unless (mkdir($fpnow,0777)) {
1678: $fperror="error: ".($!+0)
1679: ." mkdir failed while attempting "
1680: ."makeuser";
1681: }
1682: }
1683: }
1684: unless ($fperror) {
1685: my $result=&make_passwd_file($uname, $umode,$npass,
1686: $passfilename);
1687: print $client $result;
1688: } else {
1689: print $client "$fperror\n";
1690: }
1691: }
1692: } else {
1693: Reply($client, "refused\n", $userinput);
1694:
1695: }
1696: umask($oldumask);
1697: # -------------------------------------------------------------- changeuserauth
1698: } elsif ($userinput =~ /^changeuserauth/) { # encoded & client
1699: &Debug("Changing authorization");
1700: if (($wasenc==1) && isClient) {
1701: my
1702: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
1703: chomp($npass);
1704: &Debug("cmd = ".$cmd." domain= ".$udom.
1705: "uname =".$uname." umode= ".$umode);
1706: $npass=&unescape($npass);
1707: my $proname=&propath($udom,$uname);
1708: my $passfilename="$proname/passwd";
1709: if ($udom ne $currentdomainid) {
1710: print $client "not_right_domain\n";
1711: } else {
1712: my $result=&make_passwd_file($uname, $umode,$npass,
1713: $passfilename);
1714: print $client $result;
1715: }
1716: } else {
1717: Reply($client, "refused\n", $userinput);
1718:
1719: }
1720: # ------------------------------------------------------------------------ home
1721: } elsif ($userinput =~ /^home/) { # client clear or encoded
1722: if(isClient) {
1723: my ($cmd,$udom,$uname)=split(/:/,$userinput);
1724: chomp($uname);
1725: my $proname=propath($udom,$uname);
1726: if (-e $proname) {
1727: print $client "found\n";
1728: } else {
1729: print $client "not_found\n";
1730: }
1731: } else {
1732: Reply($client, "refused\n", $userinput);
1733:
1734: }
1735: # ---------------------------------------------------------------------- update
1736: } elsif ($userinput =~ /^update/) { # client clear or encoded.
1737: if(isClient) {
1738: my ($cmd,$fname)=split(/:/,$userinput);
1739: my $ownership=ishome($fname);
1740: if ($ownership eq 'not_owner') {
1741: if (-e $fname) {
1742: my ($dev,$ino,$mode,$nlink,
1743: $uid,$gid,$rdev,$size,
1744: $atime,$mtime,$ctime,
1745: $blksize,$blocks)=stat($fname);
1746: my $now=time;
1747: my $since=$now-$atime;
1748: if ($since>$perlvar{'lonExpire'}) {
1749: my $reply=
1750: &reply("unsub:$fname","$clientname");
1751: unlink("$fname");
1752: } else {
1753: my $transname="$fname.in.transfer";
1754: my $remoteurl=
1755: &reply("sub:$fname","$clientname");
1756: my $response;
1757: {
1758: my $ua=new LWP::UserAgent;
1759: my $request=new HTTP::Request('GET',"$remoteurl");
1760: $response=$ua->request($request,$transname);
1761: }
1762: if ($response->is_error()) {
1763: unlink($transname);
1764: my $message=$response->status_line;
1765: &logthis(
1766: "LWP GET: $message for $fname ($remoteurl)");
1767: } else {
1768: if ($remoteurl!~/\.meta$/) {
1769: my $ua=new LWP::UserAgent;
1770: my $mrequest=
1771: new HTTP::Request('GET',$remoteurl.'.meta');
1772: my $mresponse=
1773: $ua->request($mrequest,$fname.'.meta');
1774: if ($mresponse->is_error()) {
1775: unlink($fname.'.meta');
1776: }
1777: }
1778: rename($transname,$fname);
1779: }
1780: }
1781: print $client "ok\n";
1782: } else {
1783: print $client "not_found\n";
1784: }
1785: } else {
1786: print $client "rejected\n";
1787: }
1788: } else {
1789: Reply($client, "refused\n", $userinput);
1790:
1791: }
1792: # -------------------------------------- fetch a user file from a remote server
1793: } elsif ($userinput =~ /^fetchuserfile/) { # Client clear or enc.
1794: if(isClient) {
1795: my ($cmd,$fname)=split(/:/,$userinput);
1796: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
1797: my $udir=propath($udom,$uname).'/userfiles';
1798: unless (-e $udir) { mkdir($udir,0770); }
1799: if (-e $udir) {
1800: $ufile=~s/^[\.\~]+//;
1801: my $path = $udir;
1802: if ($ufile =~m|(.+)/([^/]+)$|) {
1803: my @parts=split('/',$1);
1804: foreach my $part (@parts) {
1805: $path .= '/'.$part;
1806: if ((-e $path)!=1) {
1807: mkdir($path,0770);
1808: }
1809: }
1810: }
1811: my $destname=$udir.'/'.$ufile;
1812: my $transname=$udir.'/'.$ufile.'.in.transit';
1813: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
1814: my $response;
1815: {
1816: my $ua=new LWP::UserAgent;
1817: my $request=new HTTP::Request('GET',"$remoteurl");
1818: $response=$ua->request($request,$transname);
1819: }
1820: if ($response->is_error()) {
1821: unlink($transname);
1822: my $message=$response->status_line;
1823: &logthis("LWP GET: $message for $fname ($remoteurl)");
1824: print $client "failed\n";
1825: } else {
1826: if (!rename($transname,$destname)) {
1827: &logthis("Unable to move $transname to $destname");
1828: unlink($transname);
1829: print $client "failed\n";
1830: } else {
1831: print $client "ok\n";
1832: }
1833: }
1834: } else {
1835: print $client "not_home\n";
1836: }
1837: } else {
1838: Reply($client, "refused\n", $userinput);
1839: }
1840: # --------------------------------------------------------- remove a user file
1841: } elsif ($userinput =~ /^removeuserfile/) { # Client clear or enc.
1842: if(isClient) {
1843: my ($cmd,$fname)=split(/:/,$userinput);
1844: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
1845: &logthis("$udom - $uname - $ufile");
1846: if ($ufile =~m|/\.\./|) {
1847: # any files paths with /../ in them refuse
1848: # to deal with
1849: print $client "refused\n";
1850: } else {
1851: my $udir=propath($udom,$uname);
1852: if (-e $udir) {
1853: my $file=$udir.'/userfiles/'.$ufile;
1854: if (-e $file) {
1855: unlink($file);
1856: if (-e $file) {
1857: print $client "failed\n";
1858: } else {
1859: print $client "ok\n";
1860: }
1861: } else {
1862: print $client "not_found\n";
1863: }
1864: } else {
1865: print $client "not_home\n";
1866: }
1867: }
1868: } else {
1869: Reply($client, "refused\n", $userinput);
1870: }
1871: # ------------------------------------------ authenticate access to a user file
1872: } elsif ($userinput =~ /^tokenauthuserfile/) { # Client only
1873: if(isClient) {
1874: my ($cmd,$fname,$session)=split(/:/,$userinput);
1875: chomp($session);
1876: my $reply='non_auth';
1877: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
1878: $session.'.id')) {
1879: while (my $line=<ENVIN>) {
1880: if ($line=~ m|userfile\.\Q$fname\E\=|) { $reply='ok'; }
1881: }
1882: close(ENVIN);
1883: print $client $reply."\n";
1884: } else {
1885: print $client "invalid_token\n";
1886: }
1887: } else {
1888: Reply($client, "refused\n", $userinput);
1889:
1890: }
1891: # ----------------------------------------------------------------- unsubscribe
1892: } elsif ($userinput =~ /^unsub/) {
1893: if(isClient) {
1894: my ($cmd,$fname)=split(/:/,$userinput);
1895: if (-e $fname) {
1896: print $client &unsub($fname,$clientip);
1897: } else {
1898: print $client "not_found\n";
1899: }
1900: } else {
1901: Reply($client, "refused\n", $userinput);
1902:
1903: }
1904: # ------------------------------------------------------------------- subscribe
1905: } elsif ($userinput =~ /^sub/) {
1906: if(isClient) {
1907: print $client &subscribe($userinput,$clientip);
1908: } else {
1909: Reply($client, "refused\n", $userinput);
1910:
1911: }
1912: # ------------------------------------------------------------- current version
1913: } elsif ($userinput =~ /^currentversion/) {
1914: if(isClient) {
1915: my ($cmd,$fname)=split(/:/,$userinput);
1916: print $client ¤tversion($fname)."\n";
1917: } else {
1918: Reply($client, "refused\n", $userinput);
1919:
1920: }
1921: # ------------------------------------------------------------------------- log
1922: } elsif ($userinput =~ /^log/) {
1923: if(isClient) {
1924: my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
1925: chomp($what);
1926: my $proname=propath($udom,$uname);
1927: my $now=time;
1928: {
1929: my $hfh;
1930: if ($hfh=IO::File->new(">>$proname/activity.log")) {
1931: print $hfh "$now:$clientname:$what\n";
1932: print $client "ok\n";
1933: } else {
1934: print $client "error: ".($!+0)
1935: ." IO::File->new Failed "
1936: ."while attempting log\n";
1937: }
1938: }
1939: } else {
1940: Reply($client, "refused\n", $userinput);
1941:
1942: }
1943: # ------------------------------------------------------------------------- put
1944: } elsif ($userinput =~ /^put/) {
1945: if(isClient) {
1946: my ($cmd,$udom,$uname,$namespace,$what)
1947: =split(/:/,$userinput,5);
1948: $namespace=~s/\//\_/g;
1949: $namespace=~s/\W//g;
1950: if ($namespace ne 'roles') {
1951: chomp($what);
1952: my $proname=propath($udom,$uname);
1953: my $now=time;
1954: my @pairs=split(/\&/,$what);
1955: my %hash;
1956: if (tie(%hash,'GDBM_File',
1957: "$proname/$namespace.db",
1958: &GDBM_WRCREAT(),0640)) {
1959: unless ($namespace=~/^nohist\_/) {
1960: my $hfh;
1961: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) { print $hfh "P:$now:$what\n"; }
1962: }
1963:
1964: foreach my $pair (@pairs) {
1965: my ($key,$value)=split(/=/,$pair);
1966: $hash{$key}=$value;
1967: }
1968: if (untie(%hash)) {
1969: print $client "ok\n";
1970: } else {
1971: print $client "error: ".($!+0)
1972: ." untie(GDBM) failed ".
1973: "while attempting put\n";
1974: }
1975: } else {
1976: print $client "error: ".($!)
1977: ." tie(GDBM) Failed ".
1978: "while attempting put\n";
1979: }
1980: } else {
1981: print $client "refused\n";
1982: }
1983: } else {
1984: Reply($client, "refused\n", $userinput);
1985:
1986: }
1987: # ------------------------------------------------------------------- inc
1988: } elsif ($userinput =~ /^inc:/) {
1989: if(isClient) {
1990: my ($cmd,$udom,$uname,$namespace,$what)
1991: =split(/:/,$userinput);
1992: $namespace=~s/\//\_/g;
1993: $namespace=~s/\W//g;
1994: if ($namespace ne 'roles') {
1995: chomp($what);
1996: my $proname=propath($udom,$uname);
1997: my $now=time;
1998: my @pairs=split(/\&/,$what);
1999: my %hash;
2000: if (tie(%hash,'GDBM_File',
2001: "$proname/$namespace.db",
2002: &GDBM_WRCREAT(),0640)) {
2003: unless ($namespace=~/^nohist\_/) {
2004: my $hfh;
2005: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) { print $hfh "P:$now:$what\n"; }
2006: }
2007: foreach my $pair (@pairs) {
2008: my ($key,$value)=split(/=/,$pair);
2009: # We could check that we have a number...
2010: if (! defined($value) || $value eq '') {
2011: $value = 1;
2012: }
2013: $hash{$key}+=$value;
2014: }
2015: if (untie(%hash)) {
2016: print $client "ok\n";
2017: } else {
2018: print $client "error: ".($!+0)
2019: ." untie(GDBM) failed ".
2020: "while attempting inc\n";
2021: }
2022: } else {
2023: print $client "error: ".($!)
2024: ." tie(GDBM) Failed ".
2025: "while attempting inc\n";
2026: }
2027: } else {
2028: print $client "refused\n";
2029: }
2030: } else {
2031: Reply($client, "refused\n", $userinput);
2032:
2033: }
2034: # -------------------------------------------------------------------- rolesput
2035: } elsif ($userinput =~ /^rolesput/) {
2036: if(isClient) {
2037: &Debug("rolesput");
2038: if ($wasenc==1) {
2039: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
2040: =split(/:/,$userinput);
2041: &Debug("cmd = ".$cmd." exedom= ".$exedom.
2042: "user = ".$exeuser." udom=".$udom.
2043: "what = ".$what);
2044: my $namespace='roles';
2045: chomp($what);
2046: my $proname=propath($udom,$uname);
2047: my $now=time;
2048: my @pairs=split(/\&/,$what);
2049: my %hash;
2050: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2051: {
2052: my $hfh;
2053: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) {
2054: print $hfh "P:$now:$exedom:$exeuser:$what\n";
2055: }
2056: }
2057:
2058: foreach my $pair (@pairs) {
2059: my ($key,$value)=split(/=/,$pair);
2060: &ManagePermissions($key, $udom, $uname,
2061: &GetAuthType( $udom,
2062: $uname));
2063: $hash{$key}=$value;
2064: }
2065: if (untie(%hash)) {
2066: print $client "ok\n";
2067: } else {
2068: print $client "error: ".($!+0)
2069: ." untie(GDBM) Failed ".
2070: "while attempting rolesput\n";
2071: }
2072: } else {
2073: print $client "error: ".($!+0)
2074: ." tie(GDBM) Failed ".
2075: "while attempting rolesput\n";
2076: }
2077: } else {
2078: print $client "refused\n";
2079: }
2080: } else {
2081: Reply($client, "refused\n", $userinput);
2082:
2083: }
2084: # -------------------------------------------------------------------- rolesdel
2085: } elsif ($userinput =~ /^rolesdel/) {
2086: if(isClient) {
2087: &Debug("rolesdel");
2088: if ($wasenc==1) {
2089: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
2090: =split(/:/,$userinput);
2091: &Debug("cmd = ".$cmd." exedom= ".$exedom.
2092: "user = ".$exeuser." udom=".$udom.
2093: "what = ".$what);
2094: my $namespace='roles';
2095: chomp($what);
2096: my $proname=propath($udom,$uname);
2097: my $now=time;
2098: my @rolekeys=split(/\&/,$what);
2099: my %hash;
2100: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2101: {
2102: my $hfh;
2103: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) {
2104: print $hfh "D:$now:$exedom:$exeuser:$what\n";
2105: }
2106: }
2107: foreach my $key (@rolekeys) {
2108: delete $hash{$key};
2109: }
2110: if (untie(%hash)) {
2111: print $client "ok\n";
2112: } else {
2113: print $client "error: ".($!+0)
2114: ." untie(GDBM) Failed ".
2115: "while attempting rolesdel\n";
2116: }
2117: } else {
2118: print $client "error: ".($!+0)
2119: ." tie(GDBM) Failed ".
2120: "while attempting rolesdel\n";
2121: }
2122: } else {
2123: print $client "refused\n";
2124: }
2125: } else {
2126: Reply($client, "refused\n", $userinput);
2127:
2128: }
2129: # ------------------------------------------------------------------------- get
2130: } elsif ($userinput =~ /^get/) {
2131: if(isClient) {
2132: my ($cmd,$udom,$uname,$namespace,$what)
2133: =split(/:/,$userinput);
2134: $namespace=~s/\//\_/g;
2135: $namespace=~s/\W//g;
2136: chomp($what);
2137: my @queries=split(/\&/,$what);
2138: my $proname=propath($udom,$uname);
2139: my $qresult='';
2140: my %hash;
2141: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2142: for (my $i=0;$i<=$#queries;$i++) {
2143: $qresult.="$hash{$queries[$i]}&";
2144: }
2145: if (untie(%hash)) {
2146: $qresult=~s/\&$//;
2147: print $client "$qresult\n";
2148: } else {
2149: print $client "error: ".($!+0)
2150: ." untie(GDBM) Failed ".
2151: "while attempting get\n";
2152: }
2153: } else {
2154: if ($!+0 == 2) {
2155: print $client "error:No such file or ".
2156: "GDBM reported bad block error\n";
2157: } else {
2158: print $client "error: ".($!+0)
2159: ." tie(GDBM) Failed ".
2160: "while attempting get\n";
2161: }
2162: }
2163: } else {
2164: Reply($client, "refused\n", $userinput);
2165:
2166: }
2167: # ------------------------------------------------------------------------ eget
2168: } elsif ($userinput =~ /^eget/) {
2169: if (isClient) {
2170: my ($cmd,$udom,$uname,$namespace,$what)
2171: =split(/:/,$userinput);
2172: $namespace=~s/\//\_/g;
2173: $namespace=~s/\W//g;
2174: chomp($what);
2175: my @queries=split(/\&/,$what);
2176: my $proname=propath($udom,$uname);
2177: my $qresult='';
2178: my %hash;
2179: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2180: for (my $i=0;$i<=$#queries;$i++) {
2181: $qresult.="$hash{$queries[$i]}&";
2182: }
2183: if (untie(%hash)) {
2184: $qresult=~s/\&$//;
2185: if ($cipher) {
2186: my $cmdlength=length($qresult);
2187: $qresult.=" ";
2188: my $encqresult='';
2189: for
2190: (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
2191: $encqresult.=
2192: unpack("H16",
2193: $cipher->encrypt(substr($qresult,$encidx,8)));
2194: }
2195: print $client "enc:$cmdlength:$encqresult\n";
2196: } else {
2197: print $client "error:no_key\n";
2198: }
2199: } else {
2200: print $client "error: ".($!+0)
2201: ." untie(GDBM) Failed ".
2202: "while attempting eget\n";
2203: }
2204: } else {
2205: print $client "error: ".($!+0)
2206: ." tie(GDBM) Failed ".
2207: "while attempting eget\n";
2208: }
2209: } else {
2210: Reply($client, "refused\n", $userinput);
2211:
2212: }
2213: # ------------------------------------------------------------------------- del
2214: } elsif ($userinput =~ /^del/) {
2215: if(isClient) {
2216: my ($cmd,$udom,$uname,$namespace,$what)
2217: =split(/:/,$userinput);
2218: $namespace=~s/\//\_/g;
2219: $namespace=~s/\W//g;
2220: chomp($what);
2221: my $proname=propath($udom,$uname);
2222: my $now=time;
2223: my @keys=split(/\&/,$what);
2224: my %hash;
2225: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2226: unless ($namespace=~/^nohist\_/) {
2227: my $hfh;
2228: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) { print $hfh "D:$now:$what\n"; }
2229: }
2230: foreach my $key (@keys) {
2231: delete($hash{$key});
2232: }
2233: if (untie(%hash)) {
2234: print $client "ok\n";
2235: } else {
2236: print $client "error: ".($!+0)
2237: ." untie(GDBM) Failed ".
2238: "while attempting del\n";
2239: }
2240: } else {
2241: print $client "error: ".($!+0)
2242: ." tie(GDBM) Failed ".
2243: "while attempting del\n";
2244: }
2245: } else {
2246: Reply($client, "refused\n", $userinput);
2247:
2248: }
2249: # ------------------------------------------------------------------------ keys
2250: } elsif ($userinput =~ /^keys/) {
2251: if(isClient) {
2252: my ($cmd,$udom,$uname,$namespace)
2253: =split(/:/,$userinput);
2254: $namespace=~s/\//\_/g;
2255: $namespace=~s/\W//g;
2256: my $proname=propath($udom,$uname);
2257: my $qresult='';
2258: my %hash;
2259: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2260: foreach my $key (keys %hash) {
2261: $qresult.="$key&";
2262: }
2263: if (untie(%hash)) {
2264: $qresult=~s/\&$//;
2265: print $client "$qresult\n";
2266: } else {
2267: print $client "error: ".($!+0)
2268: ." untie(GDBM) Failed ".
2269: "while attempting keys\n";
2270: }
2271: } else {
2272: print $client "error: ".($!+0)
2273: ." tie(GDBM) Failed ".
2274: "while attempting keys\n";
2275: }
2276: } else {
2277: Reply($client, "refused\n", $userinput);
2278:
2279: }
2280: # ----------------------------------------------------------------- dumpcurrent
2281: } elsif ($userinput =~ /^currentdump/) {
2282: if (isClient) {
2283: my ($cmd,$udom,$uname,$namespace)
2284: =split(/:/,$userinput);
2285: $namespace=~s/\//\_/g;
2286: $namespace=~s/\W//g;
2287: my $qresult='';
2288: my $proname=propath($udom,$uname);
2289: my %hash;
2290: if (tie(%hash,'GDBM_File',
2291: "$proname/$namespace.db",
2292: &GDBM_READER(),0640)) {
2293: # Structure of %data:
2294: # $data{$symb}->{$parameter}=$value;
2295: # $data{$symb}->{'v.'.$parameter}=$version;
2296: # since $parameter will be unescaped, we do not
2297: # have to worry about silly parameter names...
2298: my %data = ();
2299: while (my ($key,$value) = each(%hash)) {
2300: my ($v,$symb,$param) = split(/:/,$key);
2301: next if ($v eq 'version' || $symb eq 'keys');
2302: next if (exists($data{$symb}) &&
2303: exists($data{$symb}->{$param}) &&
2304: $data{$symb}->{'v.'.$param} > $v);
2305: $data{$symb}->{$param}=$value;
2306: $data{$symb}->{'v.'.$param}=$v;
2307: }
2308: if (untie(%hash)) {
2309: while (my ($symb,$param_hash) = each(%data)) {
2310: while(my ($param,$value) = each (%$param_hash)){
2311: next if ($param =~ /^v\./);
2312: $qresult.=$symb.':'.$param.'='.$value.'&';
2313: }
2314: }
2315: chop($qresult);
2316: print $client "$qresult\n";
2317: } else {
2318: print $client "error: ".($!+0)
2319: ." untie(GDBM) Failed ".
2320: "while attempting currentdump\n";
2321: }
2322: } else {
2323: print $client "error: ".($!+0)
2324: ." tie(GDBM) Failed ".
2325: "while attempting currentdump\n";
2326: }
2327: } else {
2328: Reply($client, "refused\n", $userinput);
2329: }
2330: # ------------------------------------------------------------------------ dump
2331: } elsif ($userinput =~ /^dump/) {
2332: if(isClient) {
2333: my ($cmd,$udom,$uname,$namespace,$regexp)
2334: =split(/:/,$userinput);
2335: $namespace=~s/\//\_/g;
2336: $namespace=~s/\W//g;
2337: if (defined($regexp)) {
2338: $regexp=&unescape($regexp);
2339: } else {
2340: $regexp='.';
2341: }
2342: my $qresult='';
2343: my $proname=propath($udom,$uname);
2344: my %hash;
2345: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2346: while (my ($key,$value) = each(%hash)) {
2347: if ($regexp eq '.') {
2348: $qresult.=$key.'='.$value.'&';
2349: } else {
2350: my $unescapeKey = &unescape($key);
2351: if (eval('$unescapeKey=~/$regexp/')) {
2352: $qresult.="$key=$value&";
2353: }
2354: }
2355: }
2356: if (untie(%hash)) {
2357: chop($qresult);
2358: print $client "$qresult\n";
2359: } else {
2360: print $client "error: ".($!+0)
2361: ." untie(GDBM) Failed ".
2362: "while attempting dump\n";
2363: }
2364: } else {
2365: print $client "error: ".($!+0)
2366: ." tie(GDBM) Failed ".
2367: "while attempting dump\n";
2368: }
2369: } else {
2370: Reply($client, "refused\n", $userinput);
2371:
2372: }
2373: # ----------------------------------------------------------------------- store
2374: } elsif ($userinput =~ /^store/) {
2375: if(isClient) {
2376: my ($cmd,$udom,$uname,$namespace,$rid,$what)
2377: =split(/:/,$userinput);
2378: $namespace=~s/\//\_/g;
2379: $namespace=~s/\W//g;
2380: if ($namespace ne 'roles') {
2381: chomp($what);
2382: my $proname=propath($udom,$uname);
2383: my $now=time;
2384: my @pairs=split(/\&/,$what);
2385: my %hash;
2386: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2387: unless ($namespace=~/^nohist\_/) {
2388: my $hfh;
2389: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) {
2390: print $hfh "P:$now:$rid:$what\n";
2391: }
2392: }
2393: my @previouskeys=split(/&/,$hash{"keys:$rid"});
2394: my $key;
2395: $hash{"version:$rid"}++;
2396: my $version=$hash{"version:$rid"};
2397: my $allkeys='';
2398: foreach my $pair (@pairs) {
2399: my ($key,$value)=split(/=/,$pair);
2400: $allkeys.=$key.':';
2401: $hash{"$version:$rid:$key"}=$value;
2402: }
2403: $hash{"$version:$rid:timestamp"}=$now;
2404: $allkeys.='timestamp';
2405: $hash{"$version:keys:$rid"}=$allkeys;
2406: if (untie(%hash)) {
2407: print $client "ok\n";
2408: } else {
2409: print $client "error: ".($!+0)
2410: ." untie(GDBM) Failed ".
2411: "while attempting store\n";
2412: }
2413: } else {
2414: print $client "error: ".($!+0)
2415: ." tie(GDBM) Failed ".
2416: "while attempting store\n";
2417: }
2418: } else {
2419: print $client "refused\n";
2420: }
2421: } else {
2422: Reply($client, "refused\n", $userinput);
2423:
2424: }
2425: # --------------------------------------------------------------------- restore
2426: } elsif ($userinput =~ /^restore/) {
2427: if(isClient) {
2428: my ($cmd,$udom,$uname,$namespace,$rid)
2429: =split(/:/,$userinput);
2430: $namespace=~s/\//\_/g;
2431: $namespace=~s/\W//g;
2432: chomp($rid);
2433: my $proname=propath($udom,$uname);
2434: my $qresult='';
2435: my %hash;
2436: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2437: my $version=$hash{"version:$rid"};
2438: $qresult.="version=$version&";
2439: my $scope;
2440: for ($scope=1;$scope<=$version;$scope++) {
2441: my $vkeys=$hash{"$scope:keys:$rid"};
2442: my @keys=split(/:/,$vkeys);
2443: my $key;
2444: $qresult.="$scope:keys=$vkeys&";
2445: foreach $key (@keys) {
2446: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
2447: }
2448: }
2449: if (untie(%hash)) {
2450: $qresult=~s/\&$//;
2451: print $client "$qresult\n";
2452: } else {
2453: print $client "error: ".($!+0)
2454: ." untie(GDBM) Failed ".
2455: "while attempting restore\n";
2456: }
2457: } else {
2458: print $client "error: ".($!+0)
2459: ." tie(GDBM) Failed ".
2460: "while attempting restore\n";
2461: }
2462: } else {
2463: Reply($client, "refused\n", $userinput);
2464:
2465: }
2466: # -------------------------------------------------------------------- chatsend
2467: } elsif ($userinput =~ /^chatsend/) {
2468: if(isClient) {
2469: my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
2470: &chatadd($cdom,$cnum,$newpost);
2471: print $client "ok\n";
2472: } else {
2473: Reply($client, "refused\n", $userinput);
2474:
2475: }
2476: # -------------------------------------------------------------------- chatretr
2477: } elsif ($userinput =~ /^chatretr/) {
2478: if(isClient) {
2479: my
2480: ($cmd,$cdom,$cnum,$udom,$uname)=split(/\:/,$userinput);
2481: my $reply='';
2482: foreach (&getchat($cdom,$cnum,$udom,$uname)) {
2483: $reply.=&escape($_).':';
2484: }
2485: $reply=~s/\:$//;
2486: print $client $reply."\n";
2487: } else {
2488: Reply($client, "refused\n", $userinput);
2489:
2490: }
2491: # ------------------------------------------------------------------- querysend
2492: } elsif ($userinput =~ /^querysend/) {
2493: if (isClient) {
2494: my ($cmd,$query,
2495: $arg1,$arg2,$arg3)=split(/\:/,$userinput);
2496: $query=~s/\n*$//g;
2497: print $client "".
2498: sqlreply("$clientname\&$query".
2499: "\&$arg1"."\&$arg2"."\&$arg3")."\n";
2500: } else {
2501: Reply($client, "refused\n", $userinput);
2502:
2503: }
2504: # ------------------------------------------------------------------ queryreply
2505: } elsif ($userinput =~ /^queryreply/) {
2506: if(isClient) {
2507: my ($cmd,$id,$reply)=split(/:/,$userinput);
2508: my $store;
2509: my $execdir=$perlvar{'lonDaemons'};
2510: if ($store=IO::File->new(">$execdir/tmp/$id")) {
2511: $reply=~s/\&/\n/g;
2512: print $store $reply;
2513: close $store;
2514: my $store2=IO::File->new(">$execdir/tmp/$id.end");
2515: print $store2 "done\n";
2516: close $store2;
2517: print $client "ok\n";
2518: }
2519: else {
2520: print $client "error: ".($!+0)
2521: ." IO::File->new Failed ".
2522: "while attempting queryreply\n";
2523: }
2524: } else {
2525: Reply($client, "refused\n", $userinput);
2526:
2527: }
2528: # ----------------------------------------------------------------- courseidput
2529: } elsif ($userinput =~ /^courseidput/) {
2530: if(isClient) {
2531: my ($cmd,$udom,$what)=split(/:/,$userinput);
2532: chomp($what);
2533: $udom=~s/\W//g;
2534: my $proname=
2535: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
2536: my $now=time;
2537: my @pairs=split(/\&/,$what);
2538: my %hash;
2539: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
2540: foreach my $pair (@pairs) {
2541: my ($key,$descr,$inst_code)=split(/=/,$pair);
2542: $hash{$key}=$descr.':'.$inst_code.':'.$now;
2543: }
2544: if (untie(%hash)) {
2545: print $client "ok\n";
2546: } else {
2547: print $client "error: ".($!+0)
2548: ." untie(GDBM) Failed ".
2549: "while attempting courseidput\n";
2550: }
2551: } else {
2552: print $client "error: ".($!+0)
2553: ." tie(GDBM) Failed ".
2554: "while attempting courseidput\n";
2555: }
2556: } else {
2557: Reply($client, "refused\n", $userinput);
2558:
2559: }
2560: # ---------------------------------------------------------------- courseiddump
2561: } elsif ($userinput =~ /^courseiddump/) {
2562: if(isClient) {
2563: my ($cmd,$udom,$since,$description)
2564: =split(/:/,$userinput);
2565: if (defined($description)) {
2566: $description=&unescape($description);
2567: } else {
2568: $description='.';
2569: }
2570: unless (defined($since)) { $since=0; }
2571: my $qresult='';
2572: my $proname=
2573: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
2574: my %hash;
2575: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
2576: while (my ($key,$value) = each(%hash)) {
2577: my ($descr,$lasttime,$inst_code);
2578: if ($value =~ m/^([^\:]*):([^\:]*):(\d+)$/) {
2579: ($descr,$inst_code,$lasttime)=($1,$2,$3);
2580: } else {
2581: ($descr,$lasttime) = split(/\:/,$value);
2582: }
2583: if ($lasttime<$since) { next; }
2584: if ($description eq '.') {
2585: $qresult.=$key.'='.$descr.':'.$inst_code.'&';
2586: } else {
2587: my $unescapeVal = &unescape($descr);
2588: if (eval('$unescapeVal=~/\Q$description\E/i')) {
2589: $qresult.=$key.'='.$descr.':'.$inst_code.'&';
2590: }
2591: }
2592: }
2593: if (untie(%hash)) {
2594: chop($qresult);
2595: print $client "$qresult\n";
2596: } else {
2597: print $client "error: ".($!+0)
2598: ." untie(GDBM) Failed ".
2599: "while attempting courseiddump\n";
2600: }
2601: } else {
2602: print $client "error: ".($!+0)
2603: ." tie(GDBM) Failed ".
2604: "while attempting courseiddump\n";
2605: }
2606: } else {
2607: Reply($client, "refused\n", $userinput);
2608:
2609: }
2610: # ----------------------------------------------------------------------- idput
2611: } elsif ($userinput =~ /^idput/) {
2612: if(isClient) {
2613: my ($cmd,$udom,$what)=split(/:/,$userinput);
2614: chomp($what);
2615: $udom=~s/\W//g;
2616: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
2617: my $now=time;
2618: my @pairs=split(/\&/,$what);
2619: my %hash;
2620: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
2621: {
2622: my $hfh;
2623: if ($hfh=IO::File->new(">>$proname.hist")) {
2624: print $hfh "P:$now:$what\n";
2625: }
2626: }
2627: foreach my $pair (@pairs) {
2628: my ($key,$value)=split(/=/,$pair);
2629: $hash{$key}=$value;
2630: }
2631: if (untie(%hash)) {
2632: print $client "ok\n";
2633: } else {
2634: print $client "error: ".($!+0)
2635: ." untie(GDBM) Failed ".
2636: "while attempting idput\n";
2637: }
2638: } else {
2639: print $client "error: ".($!+0)
2640: ." tie(GDBM) Failed ".
2641: "while attempting idput\n";
2642: }
2643: } else {
2644: Reply($client, "refused\n", $userinput);
2645:
2646: }
2647: # ----------------------------------------------------------------------- idget
2648: } elsif ($userinput =~ /^idget/) {
2649: if(isClient) {
2650: my ($cmd,$udom,$what)=split(/:/,$userinput);
2651: chomp($what);
2652: $udom=~s/\W//g;
2653: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
2654: my @queries=split(/\&/,$what);
2655: my $qresult='';
2656: my %hash;
2657: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
2658: for (my $i=0;$i<=$#queries;$i++) {
2659: $qresult.="$hash{$queries[$i]}&";
2660: }
2661: if (untie(%hash)) {
2662: $qresult=~s/\&$//;
2663: print $client "$qresult\n";
2664: } else {
2665: print $client "error: ".($!+0)
2666: ." untie(GDBM) Failed ".
2667: "while attempting idget\n";
2668: }
2669: } else {
2670: print $client "error: ".($!+0)
2671: ." tie(GDBM) Failed ".
2672: "while attempting idget\n";
2673: }
2674: } else {
2675: Reply($client, "refused\n", $userinput);
2676:
2677: }
2678: # ---------------------------------------------------------------------- tmpput
2679: } elsif ($userinput =~ /^tmpput/) {
2680: if(isClient) {
2681: my ($cmd,$what)=split(/:/,$userinput);
2682: my $store;
2683: $tmpsnum++;
2684: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
2685: $id=~s/\W/\_/g;
2686: $what=~s/\n//g;
2687: my $execdir=$perlvar{'lonDaemons'};
2688: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
2689: print $store $what;
2690: close $store;
2691: print $client "$id\n";
2692: }
2693: else {
2694: print $client "error: ".($!+0)
2695: ."IO::File->new Failed ".
2696: "while attempting tmpput\n";
2697: }
2698: } else {
2699: Reply($client, "refused\n", $userinput);
2700:
2701: }
2702:
2703: # ---------------------------------------------------------------------- tmpget
2704: } elsif ($userinput =~ /^tmpget/) {
2705: if(isClient) {
2706: my ($cmd,$id)=split(/:/,$userinput);
2707: chomp($id);
2708: $id=~s/\W/\_/g;
2709: my $store;
2710: my $execdir=$perlvar{'lonDaemons'};
2711: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
2712: my $reply=<$store>;
2713: print $client "$reply\n";
2714: close $store;
2715: }
2716: else {
2717: print $client "error: ".($!+0)
2718: ."IO::File->new Failed ".
2719: "while attempting tmpget\n";
2720: }
2721: } else {
2722: Reply($client, "refused\n", $userinput);
2723:
2724: }
2725: # ---------------------------------------------------------------------- tmpdel
2726: } elsif ($userinput =~ /^tmpdel/) {
2727: if(isClient) {
2728: my ($cmd,$id)=split(/:/,$userinput);
2729: chomp($id);
2730: $id=~s/\W/\_/g;
2731: my $execdir=$perlvar{'lonDaemons'};
2732: if (unlink("$execdir/tmp/$id.tmp")) {
2733: print $client "ok\n";
2734: } else {
2735: print $client "error: ".($!+0)
2736: ."Unlink tmp Failed ".
2737: "while attempting tmpdel\n";
2738: }
2739: } else {
2740: Reply($client, "refused\n", $userinput);
2741:
2742: }
2743: # ----------------------------------------- portfolio directory list (portls)
2744: } elsif ($userinput =~ /^portls/) {
2745: if(isClient) {
2746: my ($cmd,$uname,$udom)=split(/:/,$userinput);
2747: my $udir=propath($udom,$uname).'/userfiles/portfolio';
2748: my $dirLine='';
2749: my $dirContents='';
2750: if (opendir(LSDIR,$udir.'/')){
2751: while ($dirLine = readdir(LSDIR)){
2752: $dirContents = $dirContents.$dirLine.'<br />';
2753: }
2754: } else {
2755: $dirContents = "No directory found\n";
2756: }
2757: print $client $dirContents."\n";
2758: } else {
2759: Reply($client, "refused\n", $userinput);
2760: }
2761: # -------------------------------------------------------------------------- ls
2762: } elsif ($userinput =~ /^ls/) {
2763: if(isClient) {
2764: my $obs;
2765: my $rights;
2766: my ($cmd,$ulsdir)=split(/:/,$userinput);
2767: my $ulsout='';
2768: my $ulsfn;
2769: if (-e $ulsdir) {
2770: if(-d $ulsdir) {
2771: if (opendir(LSDIR,$ulsdir)) {
2772: while ($ulsfn=readdir(LSDIR)) {
2773: undef $obs, $rights;
2774: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
2775: #We do some obsolete checking here
2776: if(-e $ulsdir.'/'.$ulsfn.".meta") {
2777: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
2778: my @obsolete=<FILE>;
2779: foreach my $obsolete (@obsolete) {
2780: if($obsolete =~ m|(<obsolete>)(on)|) { $obs = 1; }
2781: if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
2782: }
2783: }
2784: $ulsout.=$ulsfn.'&'.join('&',@ulsstats);
2785: if($obs eq '1') { $ulsout.="&1"; }
2786: else { $ulsout.="&0"; }
2787: if($rights eq '1') { $ulsout.="&1:"; }
2788: else { $ulsout.="&0:"; }
2789: }
2790: closedir(LSDIR);
2791: }
2792: } else {
2793: my @ulsstats=stat($ulsdir);
2794: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
2795: }
2796: } else {
2797: $ulsout='no_such_dir';
2798: }
2799: if ($ulsout eq '') { $ulsout='empty'; }
2800: print $client "$ulsout\n";
2801: } else {
2802: Reply($client, "refused\n", $userinput);
2803:
2804: }
2805: # ----------------------------------------------------------------- setannounce
2806: } elsif ($userinput =~ /^setannounce/) {
2807: if (isClient) {
2808: my ($cmd,$announcement)=split(/:/,$userinput);
2809: chomp($announcement);
2810: $announcement=&unescape($announcement);
2811: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
2812: '/announcement.txt')) {
2813: print $store $announcement;
2814: close $store;
2815: print $client "ok\n";
2816: } else {
2817: print $client "error: ".($!+0)."\n";
2818: }
2819: } else {
2820: Reply($client, "refused\n", $userinput);
2821:
2822: }
2823: # ------------------------------------------------------------------ Hanging up
2824: } elsif (($userinput =~ /^exit/) ||
2825: ($userinput =~ /^init/)) { # no restrictions.
2826: &logthis(
2827: "Client $clientip ($clientname) hanging up: $userinput");
2828: print $client "bye\n";
2829: $client->shutdown(2); # shutdown the socket forcibly.
2830: $client->close();
2831: return 0;
2832:
2833: # ---------------------------------- set current host/domain
2834: } elsif ($userinput =~ /^sethost:/) {
2835: if (isClient) {
2836: print $client &sethost($userinput)."\n";
2837: } else {
2838: print $client "refused\n";
2839: }
2840: #---------------------------------- request file (?) version.
2841: } elsif ($userinput =~/^version:/) {
2842: if (isClient) {
2843: print $client &version($userinput)."\n";
2844: } else {
2845: print $client "refused\n";
2846: }
2847: #------------------------------- is auto-enrollment enabled?
2848: } elsif ($userinput =~/^autorun:/) {
2849: if (isClient) {
2850: my ($cmd,$cdom) = split(/:/,$userinput);
2851: my $outcome = &localenroll::run($cdom);
2852: print $client "$outcome\n";
2853: } else {
2854: print $client "0\n";
2855: }
2856: #------------------------------- get official sections (for auto-enrollment).
2857: } elsif ($userinput =~/^autogetsections:/) {
2858: if (isClient) {
2859: my ($cmd,$coursecode,$cdom)=split(/:/,$userinput);
2860: my @secs = &localenroll::get_sections($coursecode,$cdom);
2861: my $seclist = &escape(join(':',@secs));
2862: print $client "$seclist\n";
2863: } else {
2864: print $client "refused\n";
2865: }
2866: #----------------------- validate owner of new course section (for auto-enrollment).
2867: } elsif ($userinput =~/^autonewcourse:/) {
2868: if (isClient) {
2869: my ($cmd,$inst_course_id,$owner,$cdom)=split(/:/,$userinput);
2870: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom);
2871: print $client "$outcome\n";
2872: } else {
2873: print $client "refused\n";
2874: }
2875: #-------------- validate course section in schedule of classes (for auto-enrollment).
2876: } elsif ($userinput =~/^autovalidatecourse:/) {
2877: if (isClient) {
2878: my ($cmd,$inst_course_id,$cdom)=split(/:/,$userinput);
2879: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
2880: print $client "$outcome\n";
2881: } else {
2882: print $client "refused\n";
2883: }
2884: #--------------------------- create password for new user (for auto-enrollment).
2885: } elsif ($userinput =~/^autocreatepassword:/) {
2886: if (isClient) {
2887: my ($cmd,$authparam,$cdom)=split(/:/,$userinput);
2888: my ($create_passwd,$authchk);
2889: ($authparam,$create_passwd,$authchk) = &localenroll::create_password($authparam,$cdom);
2890: print $client &escape($authparam.':'.$create_passwd.':'.$authchk)."\n";
2891: } else {
2892: print $client "refused\n";
2893: }
2894: #--------------------------- read and remove temporary files (for auto-enrollment).
2895: } elsif ($userinput =~/^autoretrieve:/) {
2896: if (isClient) {
2897: my ($cmd,$filename) = split(/:/,$userinput);
2898: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
2899: if ( (-e $source) && ($filename ne '') ) {
2900: my $reply = '';
2901: if (open(my $fh,$source)) {
2902: while (<$fh>) {
2903: chomp($_);
2904: $_ =~ s/^\s+//g;
2905: $_ =~ s/\s+$//g;
2906: $reply .= $_;
2907: }
2908: close($fh);
2909: print $client &escape($reply)."\n";
2910: # unlink($source);
2911: } else {
2912: print $client "error\n";
2913: }
2914: } else {
2915: print $client "error\n";
2916: }
2917: } else {
2918: print $client "refused\n";
2919: }
2920: #--------------------- read and retrieve institutional code format (for support form).
2921: } elsif ($userinput =~/^autoinstcodeformat:/) {
2922: if (isClient) {
2923: my $reply;
2924: my($cmd,$cdom,$course) = split(/:/,$userinput);
2925: my @pairs = split/\&/,$course;
2926: my %instcodes = ();
2927: my %codes = ();
2928: my @codetitles = ();
2929: my %cat_titles = ();
2930: my %cat_order = ();
2931: foreach (@pairs) {
2932: my ($key,$value) = split/=/,$_;
2933: $instcodes{&unescape($key)} = &unescape($value);
2934: }
2935: my $formatreply = &localenroll::instcode_format($cdom,\%instcodes,\%codes,\@codetitles,\%cat_titles,\%cat_order);
2936: if ($formatreply eq 'ok') {
2937: my $codes_str = &hash2str(%codes);
2938: my $codetitles_str = &array2str(@codetitles);
2939: my $cat_titles_str = &hash2str(%cat_titles);
2940: my $cat_order_str = &hash2str(%cat_order);
2941: print $client $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'.$cat_order_str."\n";
2942: }
2943: } else {
2944: print $client "refused\n";
2945: }
2946: # ------------------------------------------------------------- unknown command
2947:
2948: } else {
2949: # unknown command
2950: print $client "unknown_cmd\n";
2951: }
2952: # -------------------------------------------------------------------- complete
2953: Debug("process_request - returning 1");
2954: return 1;
2955: }
2956: #
2957: # Decipher encoded traffic
2958: # Parameters:
2959: # input - Encoded data.
2960: # Returns:
2961: # Decoded data or undef if encryption key was not yet negotiated.
2962: # Implicit input:
2963: # cipher - This global holds the negotiated encryption key.
2964: #
2965: sub decipher {
2966: my ($input) = @_;
2967: my $output = '';
2968:
2969:
2970: if($cipher) {
2971: my($enc, $enclength, $encinput) = split(/:/, $input);
2972: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
2973: $output .=
2974: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
2975: }
2976: return substr($output, 0, $enclength);
2977: } else {
2978: return undef;
2979: }
2980: }
2981:
2982: #
2983: # Register a command processor. This function is invoked to register a sub
2984: # to process a request. Once registered, the ProcessRequest sub can automatically
2985: # dispatch requests to an appropriate sub, and do the top level validity checking
2986: # as well:
2987: # - Is the keyword recognized.
2988: # - Is the proper client type attempting the request.
2989: # - Is the request encrypted if it has to be.
2990: # Parameters:
2991: # $request_name - Name of the request being registered.
2992: # This is the command request that will match
2993: # against the hash keywords to lookup the information
2994: # associated with the dispatch information.
2995: # $procedure - Reference to a sub to call to process the request.
2996: # All subs get called as follows:
2997: # Procedure($cmd, $tail, $replyfd, $key)
2998: # $cmd - the actual keyword that invoked us.
2999: # $tail - the tail of the request that invoked us.
3000: # $replyfd- File descriptor connected to the client
3001: # $must_encode - True if the request must be encoded to be good.
3002: # $client_ok - True if it's ok for a client to request this.
3003: # $manager_ok - True if it's ok for a manager to request this.
3004: # Side effects:
3005: # - On success, the Dispatcher hash has an entry added for the key $RequestName
3006: # - On failure, the program will die as it's a bad internal bug to try to
3007: # register a duplicate command handler.
3008: #
3009: sub register_handler {
3010: my ($request_name,$procedure,$must_encode, $client_ok,$manager_ok) = @_;
3011:
3012: # Don't allow duplication#
3013:
3014: if (defined $Dispatcher{$request_name}) {
3015: die "Attempting to define a duplicate request handler for $request_name\n";
3016: }
3017: # Build the client type mask:
3018:
3019: my $client_type_mask = 0;
3020: if($client_ok) {
3021: $client_type_mask |= $CLIENT_OK;
3022: }
3023: if($manager_ok) {
3024: $client_type_mask |= $MANAGER_OK;
3025: }
3026:
3027: # Enter the hash:
3028:
3029: my @entry = ($procedure, $must_encode, $client_type_mask);
3030:
3031: $Dispatcher{$request_name} = \@entry;
3032:
3033:
3034: }
3035:
3036:
3037: #------------------------------------------------------------------
3038:
3039:
3040:
3041:
3042: #
3043: # Convert an error return code from lcpasswd to a string value.
3044: #
3045: sub lcpasswdstrerror {
3046: my $ErrorCode = shift;
3047: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
3048: return "lcpasswd Unrecognized error return value ".$ErrorCode;
3049: } else {
3050: return $passwderrors[$ErrorCode];
3051: }
3052: }
3053:
3054: #
3055: # Convert an error return code from lcuseradd to a string value:
3056: #
3057: sub lcuseraddstrerror {
3058: my $ErrorCode = shift;
3059: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
3060: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
3061: } else {
3062: return $adderrors[$ErrorCode];
3063: }
3064: }
3065:
3066: # grabs exception and records it to log before exiting
3067: sub catchexception {
3068: my ($error)=@_;
3069: $SIG{'QUIT'}='DEFAULT';
3070: $SIG{__DIE__}='DEFAULT';
3071: &status("Catching exception");
3072: &logthis("<font color='red'>CRITICAL: "
3073: ."ABNORMAL EXIT. Child $$ for server $thisserver died through "
3074: ."a crash with this error msg->[$error]</font>");
3075: &logthis('Famous last words: '.$status.' - '.$lastlog);
3076: if ($client) { print $client "error: $error\n"; }
3077: $server->close();
3078: die($error);
3079: }
3080:
3081: sub timeout {
3082: &status("Handling Timeout");
3083: &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
3084: &catchexception('Timeout');
3085: }
3086: # -------------------------------- Set signal handlers to record abnormal exits
3087:
3088: $SIG{'QUIT'}=\&catchexception;
3089: $SIG{__DIE__}=\&catchexception;
3090:
3091: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
3092: &status("Read loncapa.conf and loncapa_apache.conf");
3093: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
3094: %perlvar=%{$perlvarref};
3095: undef $perlvarref;
3096:
3097: # ----------------------------- Make sure this process is running from user=www
3098: my $wwwid=getpwnam('www');
3099: if ($wwwid!=$<) {
3100: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
3101: my $subj="LON: $currenthostid User ID mismatch";
3102: system("echo 'User ID mismatch. lond must be run as user www.' |\
3103: mailto $emailto -s '$subj' > /dev/null");
3104: exit 1;
3105: }
3106:
3107: # --------------------------------------------- Check if other instance running
3108:
3109: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
3110:
3111: if (-e $pidfile) {
3112: my $lfh=IO::File->new("$pidfile");
3113: my $pide=<$lfh>;
3114: chomp($pide);
3115: if (kill 0 => $pide) { die "already running"; }
3116: }
3117:
3118: # ------------------------------------------------------------- Read hosts file
3119:
3120:
3121:
3122: # establish SERVER socket, bind and listen.
3123: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
3124: Type => SOCK_STREAM,
3125: Proto => 'tcp',
3126: Reuse => 1,
3127: Listen => 10 )
3128: or die "making socket: $@\n";
3129:
3130: # --------------------------------------------------------- Do global variables
3131:
3132: # global variables
3133:
3134: my %children = (); # keys are current child process IDs
3135:
3136: sub REAPER { # takes care of dead children
3137: $SIG{CHLD} = \&REAPER;
3138: &status("Handling child death");
3139: my $pid;
3140: do {
3141: $pid = waitpid(-1,&WNOHANG());
3142: if (defined($children{$pid})) {
3143: &logthis("Child $pid died");
3144: delete($children{$pid});
3145: } elsif ($pid > 0) {
3146: &logthis("Unknown Child $pid died");
3147: }
3148: } while ( $pid > 0 );
3149: foreach my $child (keys(%children)) {
3150: $pid = waitpid($child,&WNOHANG());
3151: if ($pid > 0) {
3152: &logthis("Child $child - $pid looks like we missed it's death");
3153: delete($children{$pid});
3154: }
3155: }
3156: &status("Finished Handling child death");
3157: }
3158:
3159: sub HUNTSMAN { # signal handler for SIGINT
3160: &status("Killing children (INT)");
3161: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
3162: kill 'INT' => keys %children;
3163: &logthis("Free socket: ".shutdown($server,2)); # free up socket
3164: my $execdir=$perlvar{'lonDaemons'};
3165: unlink("$execdir/logs/lond.pid");
3166: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
3167: &status("Done killing children");
3168: exit; # clean up with dignity
3169: }
3170:
3171: sub HUPSMAN { # signal handler for SIGHUP
3172: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
3173: &status("Killing children for restart (HUP)");
3174: kill 'INT' => keys %children;
3175: &logthis("Free socket: ".shutdown($server,2)); # free up socket
3176: &logthis("<font color='red'>CRITICAL: Restarting</font>");
3177: my $execdir=$perlvar{'lonDaemons'};
3178: unlink("$execdir/logs/lond.pid");
3179: &status("Restarting self (HUP)");
3180: exec("$execdir/lond"); # here we go again
3181: }
3182:
3183: #
3184: # Kill off hashes that describe the host table prior to re-reading it.
3185: # Hashes affected are:
3186: # %hostid, %hostdom %hostip %hostdns.
3187: #
3188: sub KillHostHashes {
3189: foreach my $key (keys %hostid) {
3190: delete $hostid{$key};
3191: }
3192: foreach my $key (keys %hostdom) {
3193: delete $hostdom{$key};
3194: }
3195: foreach my $key (keys %hostip) {
3196: delete $hostip{$key};
3197: }
3198: foreach my $key (keys %hostdns) {
3199: delete $hostdns{$key};
3200: }
3201: }
3202: #
3203: # Read in the host table from file and distribute it into the various hashes:
3204: #
3205: # - %hostid - Indexed by IP, the loncapa hostname.
3206: # - %hostdom - Indexed by loncapa hostname, the domain.
3207: # - %hostip - Indexed by hostid, the Ip address of the host.
3208: sub ReadHostTable {
3209:
3210: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
3211: my $myloncapaname = $perlvar{'lonHostID'};
3212: Debug("My loncapa name is : $myloncapaname");
3213: while (my $configline=<CONFIG>) {
3214: if (!($configline =~ /^\s*\#/)) {
3215: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
3216: chomp($ip); $ip=~s/\D+$//;
3217: $hostid{$ip}=$id; # LonCAPA name of host by IP.
3218: $hostdom{$id}=$domain; # LonCAPA domain name of host.
3219: $hostip{$id}=$ip; # IP address of host.
3220: $hostdns{$name} = $id; # LonCAPA name of host by DNS.
3221:
3222: if ($id eq $perlvar{'lonHostID'}) {
3223: Debug("Found me in the host table: $name");
3224: $thisserver=$name;
3225: }
3226: }
3227: }
3228: close(CONFIG);
3229: }
3230: #
3231: # Reload the Apache daemon's state.
3232: # This is done by invoking /home/httpd/perl/apachereload
3233: # a setuid perl script that can be root for us to do this job.
3234: #
3235: sub ReloadApache {
3236: my $execdir = $perlvar{'lonDaemons'};
3237: my $script = $execdir."/apachereload";
3238: system($script);
3239: }
3240:
3241: #
3242: # Called in response to a USR2 signal.
3243: # - Reread hosts.tab
3244: # - All children connected to hosts that were removed from hosts.tab
3245: # are killed via SIGINT
3246: # - All children connected to previously existing hosts are sent SIGUSR1
3247: # - Our internal hosts hash is updated to reflect the new contents of
3248: # hosts.tab causing connections from hosts added to hosts.tab to
3249: # now be honored.
3250: #
3251: sub UpdateHosts {
3252: &status("Reload hosts.tab");
3253: logthis('<font color="blue"> Updating connections </font>');
3254: #
3255: # The %children hash has the set of IP's we currently have children
3256: # on. These need to be matched against records in the hosts.tab
3257: # Any ip's no longer in the table get killed off they correspond to
3258: # either dropped or changed hosts. Note that the re-read of the table
3259: # will take care of new and changed hosts as connections come into being.
3260:
3261:
3262: KillHostHashes;
3263: ReadHostTable;
3264:
3265: foreach my $child (keys %children) {
3266: my $childip = $children{$child};
3267: if(!$hostid{$childip}) {
3268: logthis('<font color="blue"> UpdateHosts killing child '
3269: ." $child for ip $childip </font>");
3270: kill('INT', $child);
3271: } else {
3272: logthis('<font color="green"> keeping child for ip '
3273: ." $childip (pid=$child) </font>");
3274: }
3275: }
3276: ReloadApache;
3277: &status("Finished reloading hosts.tab");
3278: }
3279:
3280:
3281: sub checkchildren {
3282: &status("Checking on the children (sending signals)");
3283: &initnewstatus();
3284: &logstatus();
3285: &logthis('Going to check on the children');
3286: my $docdir=$perlvar{'lonDocRoot'};
3287: foreach (sort keys %children) {
3288: sleep 1;
3289: unless (kill 'USR1' => $_) {
3290: &logthis ('Child '.$_.' is dead');
3291: &logstatus($$.' is dead');
3292: }
3293: }
3294: sleep 5;
3295: $SIG{ALRM} = sub { Debug("timeout");
3296: die "timeout"; };
3297: $SIG{__DIE__} = 'DEFAULT';
3298: &status("Checking on the children (waiting for reports)");
3299: foreach (sort keys %children) {
3300: unless (-e "$docdir/lon-status/londchld/$_.txt") {
3301: eval {
3302: alarm(300);
3303: &logthis('Child '.$_.' did not respond');
3304: kill 9 => $_;
3305: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
3306: #$subj="LON: $currenthostid killed lond process $_";
3307: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
3308: #$execdir=$perlvar{'lonDaemons'};
3309: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
3310: alarm(0);
3311: }
3312: }
3313: }
3314: $SIG{ALRM} = 'DEFAULT';
3315: $SIG{__DIE__} = \&catchexception;
3316: &status("Finished checking children");
3317: }
3318:
3319: # --------------------------------------------------------------------- Logging
3320:
3321: sub logthis {
3322: my $message=shift;
3323: my $execdir=$perlvar{'lonDaemons'};
3324: my $fh=IO::File->new(">>$execdir/logs/lond.log");
3325: my $now=time;
3326: my $local=localtime($now);
3327: $lastlog=$local.': '.$message;
3328: print $fh "$local ($$): $message\n";
3329: }
3330:
3331: # ------------------------- Conditional log if $DEBUG true.
3332: sub Debug {
3333: my $message = shift;
3334: if($DEBUG) {
3335: &logthis($message);
3336: }
3337: }
3338:
3339: #
3340: # Sub to do replies to client.. this gives a hook for some
3341: # debug tracing too:
3342: # Parameters:
3343: # fd - File open on client.
3344: # reply - Text to send to client.
3345: # request - Original request from client.
3346: #
3347: sub Reply {
3348: my ($fd, $reply, $request) = @_;
3349: print $fd $reply;
3350: Debug("Request was $request Reply was $reply");
3351:
3352: $Transactions++;
3353:
3354:
3355: }
3356:
3357:
3358: #
3359: # Sub to report a failure.
3360: # This function:
3361: # - Increments the failure statistic counters.
3362: # - Invokes Reply to send the error message to the client.
3363: # Parameters:
3364: # fd - File descriptor open on the client
3365: # reply - Reply text to emit.
3366: # request - The original request message (used by Reply
3367: # to debug if that's enabled.
3368: # Implicit outputs:
3369: # $Failures- The number of failures is incremented.
3370: # Reply (invoked here) sends a message to the
3371: # client:
3372: #
3373: sub Failure {
3374: my $fd = shift;
3375: my $reply = shift;
3376: my $request = shift;
3377:
3378: $Failures++;
3379: Reply($fd, $reply, $request); # That's simple eh?
3380: }
3381: # ------------------------------------------------------------------ Log status
3382:
3383: sub logstatus {
3384: &status("Doing logging");
3385: my $docdir=$perlvar{'lonDocRoot'};
3386: {
3387: my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");
3388: print $fh $$."\t".$clientname."\t".$currenthostid."\t"
3389: .$status."\t".$lastlog."\t $keymode\n";
3390: $fh->close();
3391: }
3392: &status("Finished londstatus.txt");
3393: {
3394: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
3395: print $fh $status."\n".$lastlog."\n".time."\n$keymode";
3396: $fh->close();
3397: }
3398: &status("Finished logging");
3399: }
3400:
3401: sub initnewstatus {
3402: my $docdir=$perlvar{'lonDocRoot'};
3403: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
3404: my $now=time;
3405: my $local=localtime($now);
3406: print $fh "LOND status $local - parent $$\n\n";
3407: opendir(DIR,"$docdir/lon-status/londchld");
3408: while (my $filename=readdir(DIR)) {
3409: unlink("$docdir/lon-status/londchld/$filename");
3410: }
3411: closedir(DIR);
3412: }
3413:
3414: # -------------------------------------------------------------- Status setting
3415:
3416: sub status {
3417: my $what=shift;
3418: my $now=time;
3419: my $local=localtime($now);
3420: $status=$local.': '.$what;
3421: $0='lond: '.$what.' '.$local;
3422: }
3423:
3424: # -------------------------------------------------------- Escape Special Chars
3425:
3426: sub escape {
3427: my $str=shift;
3428: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
3429: return $str;
3430: }
3431:
3432: # ----------------------------------------------------- Un-Escape Special Chars
3433:
3434: sub unescape {
3435: my $str=shift;
3436: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
3437: return $str;
3438: }
3439:
3440: # ----------------------------------------------------------- Send USR1 to lonc
3441:
3442: sub reconlonc {
3443: my $peerfile=shift;
3444: &logthis("Trying to reconnect for $peerfile");
3445: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
3446: if (my $fh=IO::File->new("$loncfile")) {
3447: my $loncpid=<$fh>;
3448: chomp($loncpid);
3449: if (kill 0 => $loncpid) {
3450: &logthis("lonc at pid $loncpid responding, sending USR1");
3451: kill USR1 => $loncpid;
3452: } else {
3453: &logthis(
3454: "<font color='red'>CRITICAL: "
3455: ."lonc at pid $loncpid not responding, giving up</font>");
3456: }
3457: } else {
3458: &logthis('<font color="red">CRITICAL: lonc not running, giving up</font>');
3459: }
3460: }
3461:
3462: # -------------------------------------------------- Non-critical communication
3463:
3464: sub subreply {
3465: my ($cmd,$server)=@_;
3466: my $peerfile="$perlvar{'lonSockDir'}/$server";
3467: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
3468: Type => SOCK_STREAM,
3469: Timeout => 10)
3470: or return "con_lost";
3471: print $sclient "$cmd\n";
3472: my $answer=<$sclient>;
3473: chomp($answer);
3474: if (!$answer) { $answer="con_lost"; }
3475: return $answer;
3476: }
3477:
3478: sub reply {
3479: my ($cmd,$server)=@_;
3480: my $answer;
3481: if ($server ne $currenthostid) {
3482: $answer=subreply($cmd,$server);
3483: if ($answer eq 'con_lost') {
3484: $answer=subreply("ping",$server);
3485: if ($answer ne $server) {
3486: &logthis("sub reply: answer != server answer is $answer, server is $server");
3487: &reconlonc("$perlvar{'lonSockDir'}/$server");
3488: }
3489: $answer=subreply($cmd,$server);
3490: }
3491: } else {
3492: $answer='self_reply';
3493: }
3494: return $answer;
3495: }
3496:
3497: # -------------------------------------------------------------- Talk to lonsql
3498:
3499: sub sqlreply {
3500: my ($cmd)=@_;
3501: my $answer=subsqlreply($cmd);
3502: if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }
3503: return $answer;
3504: }
3505:
3506: sub subsqlreply {
3507: my ($cmd)=@_;
3508: my $unixsock="mysqlsock";
3509: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
3510: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
3511: Type => SOCK_STREAM,
3512: Timeout => 10)
3513: or return "con_lost";
3514: print $sclient "$cmd\n";
3515: my $answer=<$sclient>;
3516: chomp($answer);
3517: if (!$answer) { $answer="con_lost"; }
3518: return $answer;
3519: }
3520:
3521: # -------------------------------------------- Return path to profile directory
3522:
3523: sub propath {
3524: my ($udom,$uname)=@_;
3525: $udom=~s/\W//g;
3526: $uname=~s/\W//g;
3527: my $subdir=$uname.'__';
3528: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
3529: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
3530: return $proname;
3531: }
3532:
3533: # --------------------------------------- Is this the home server of an author?
3534:
3535: sub ishome {
3536: my $author=shift;
3537: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
3538: my ($udom,$uname)=split(/\//,$author);
3539: my $proname=propath($udom,$uname);
3540: if (-e $proname) {
3541: return 'owner';
3542: } else {
3543: return 'not_owner';
3544: }
3545: }
3546:
3547: # ======================================================= Continue main program
3548: # ---------------------------------------------------- Fork once and dissociate
3549:
3550: my $fpid=fork;
3551: exit if $fpid;
3552: die "Couldn't fork: $!" unless defined ($fpid);
3553:
3554: POSIX::setsid() or die "Can't start new session: $!";
3555:
3556: # ------------------------------------------------------- Write our PID on disk
3557:
3558: my $execdir=$perlvar{'lonDaemons'};
3559: open (PIDSAVE,">$execdir/logs/lond.pid");
3560: print PIDSAVE "$$\n";
3561: close(PIDSAVE);
3562: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
3563: &status('Starting');
3564:
3565:
3566:
3567: # ----------------------------------------------------- Install signal handlers
3568:
3569:
3570: $SIG{CHLD} = \&REAPER;
3571: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
3572: $SIG{HUP} = \&HUPSMAN;
3573: $SIG{USR1} = \&checkchildren;
3574: $SIG{USR2} = \&UpdateHosts;
3575:
3576: # Read the host hashes:
3577:
3578: ReadHostTable;
3579:
3580: # --------------------------------------------------------------
3581: # Accept connections. When a connection comes in, it is validated
3582: # and if good, a child process is created to process transactions
3583: # along the connection.
3584:
3585: while (1) {
3586: &status('Starting accept');
3587: $client = $server->accept() or next;
3588: &status('Accepted '.$client.' off to spawn');
3589: make_new_child($client);
3590: &status('Finished spawning');
3591: }
3592:
3593: sub make_new_child {
3594: my $pid;
3595: # my $cipher; # Now global
3596: my $sigset;
3597:
3598: $client = shift;
3599: &status('Starting new child '.$client);
3600: &logthis('<font color="green"> Attempting to start child ('.$client.
3601: ")</font>");
3602: # block signal for fork
3603: $sigset = POSIX::SigSet->new(SIGINT);
3604: sigprocmask(SIG_BLOCK, $sigset)
3605: or die "Can't block SIGINT for fork: $!\n";
3606:
3607: die "fork: $!" unless defined ($pid = fork);
3608:
3609: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
3610: # connection liveness.
3611:
3612: #
3613: # Figure out who we're talking to so we can record the peer in
3614: # the pid hash.
3615: #
3616: my $caller = getpeername($client);
3617: my ($port,$iaddr);
3618: if (defined($caller) && length($caller) > 0) {
3619: ($port,$iaddr)=unpack_sockaddr_in($caller);
3620: } else {
3621: &logthis("Unable to determine who caller was, getpeername returned nothing");
3622: }
3623: if (defined($iaddr)) {
3624: $clientip = inet_ntoa($iaddr);
3625: Debug("Connected with $clientip");
3626: $clientdns = gethostbyaddr($iaddr, AF_INET);
3627: Debug("Connected with $clientdns by name");
3628: } else {
3629: &logthis("Unable to determine clientip");
3630: $clientip='Unavailable';
3631: }
3632:
3633: if ($pid) {
3634: # Parent records the child's birth and returns.
3635: sigprocmask(SIG_UNBLOCK, $sigset)
3636: or die "Can't unblock SIGINT for fork: $!\n";
3637: $children{$pid} = $clientip;
3638: &status('Started child '.$pid);
3639: return;
3640: } else {
3641: # Child can *not* return from this subroutine.
3642: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
3643: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
3644: #don't get intercepted
3645: $SIG{USR1}= \&logstatus;
3646: $SIG{ALRM}= \&timeout;
3647: $lastlog='Forked ';
3648: $status='Forked';
3649:
3650: # unblock signals
3651: sigprocmask(SIG_UNBLOCK, $sigset)
3652: or die "Can't unblock SIGINT for fork: $!\n";
3653:
3654: # my $tmpsnum=0; # Now global
3655: #---------------------------------------------------- kerberos 5 initialization
3656: &Authen::Krb5::init_context();
3657: &Authen::Krb5::init_ets();
3658:
3659: &status('Accepted connection');
3660: # =============================================================================
3661: # do something with the connection
3662: # -----------------------------------------------------------------------------
3663: # see if we know client and 'check' for spoof IP by ineffective challenge
3664:
3665: ReadManagerTable; # May also be a manager!!
3666:
3667: my $clientrec=($hostid{$clientip} ne undef);
3668: my $ismanager=($managers{$clientip} ne undef);
3669: $clientname = "[unknonwn]";
3670: if($clientrec) { # Establish client type.
3671: $ConnectionType = "client";
3672: $clientname = $hostid{$clientip};
3673: if($ismanager) {
3674: $ConnectionType = "both";
3675: }
3676: } else {
3677: $ConnectionType = "manager";
3678: $clientname = $managers{$clientip};
3679: }
3680: my $clientok;
3681:
3682: if ($clientrec || $ismanager) {
3683: &status("Waiting for init from $clientip $clientname");
3684: &logthis('<font color="yellow">INFO: Connection, '.
3685: $clientip.
3686: " ($clientname) connection type = $ConnectionType </font>" );
3687: &status("Connecting $clientip ($clientname))");
3688: my $remotereq=<$client>;
3689: chomp($remotereq);
3690: Debug("Got init: $remotereq");
3691: my $inikeyword = split(/:/, $remotereq);
3692: if ($remotereq =~ /^init/) {
3693: &sethost("sethost:$perlvar{'lonHostID'}");
3694: #
3695: # If the remote is attempting a local init... give that a try:
3696: #
3697: my ($i, $inittype) = split(/:/, $remotereq);
3698:
3699: # If the connection type is ssl, but I didn't get my
3700: # certificate files yet, then I'll drop back to
3701: # insecure (if allowed).
3702:
3703: if($inittype eq "ssl") {
3704: my ($ca, $cert) = lonssl::CertificateFile;
3705: my $kfile = lonssl::KeyFile;
3706: if((!$ca) ||
3707: (!$cert) ||
3708: (!$kfile)) {
3709: $inittype = ""; # This forces insecure attempt.
3710: &logthis("<font color=\"blue\"> Certificates not "
3711: ."installed -- trying insecure auth</font>");
3712: }
3713: else { # SSL certificates are in place so
3714: } # Leave the inittype alone.
3715: }
3716:
3717: if($inittype eq "local") {
3718: my $key = LocalConnection($client, $remotereq);
3719: if($key) {
3720: Debug("Got local key $key");
3721: $clientok = 1;
3722: my $cipherkey = pack("H32", $key);
3723: $cipher = new IDEA($cipherkey);
3724: print $client "ok:local\n";
3725: &logthis('<font color="green"'
3726: . "Successful local authentication </font>");
3727: $keymode = "local"
3728: } else {
3729: Debug("Failed to get local key");
3730: $clientok = 0;
3731: shutdown($client, 3);
3732: close $client;
3733: }
3734: } elsif ($inittype eq "ssl") {
3735: my $key = SSLConnection($client);
3736: if ($key) {
3737: $clientok = 1;
3738: my $cipherkey = pack("H32", $key);
3739: $cipher = new IDEA($cipherkey);
3740: &logthis('<font color="green">'
3741: ."Successfull ssl authentication with $clientname </font>");
3742: $keymode = "ssl";
3743:
3744: } else {
3745: $clientok = 0;
3746: close $client;
3747: }
3748:
3749: } else {
3750: my $ok = InsecureConnection($client);
3751: if($ok) {
3752: $clientok = 1;
3753: &logthis('<font color="green">'
3754: ."Successful insecure authentication with $clientname </font>");
3755: print $client "ok\n";
3756: $keymode = "insecure";
3757: } else {
3758: &logthis('<font color="yellow">'
3759: ."Attempted insecure connection disallowed </font>");
3760: close $client;
3761: $clientok = 0;
3762:
3763: }
3764: }
3765: } else {
3766: &logthis(
3767: "<font color='blue'>WARNING: "
3768: ."$clientip failed to initialize: >$remotereq< </font>");
3769: &status('No init '.$clientip);
3770: }
3771:
3772: } else {
3773: &logthis(
3774: "<font color='blue'>WARNING: Unknown client $clientip</font>");
3775: &status('Hung up on '.$clientip);
3776: }
3777:
3778: if ($clientok) {
3779: # ---------------- New known client connecting, could mean machine online again
3780:
3781: foreach my $id (keys(%hostip)) {
3782: if ($hostip{$id} ne $clientip ||
3783: $hostip{$currenthostid} eq $clientip) {
3784: # no need to try to do recon's to myself
3785: next;
3786: }
3787: &reconlonc("$perlvar{'lonSockDir'}/$id");
3788: }
3789: &logthis("<font color='green'>Established connection: $clientname</font>");
3790: &status('Will listen to '.$clientname);
3791: # ------------------------------------------------------------ Process requests
3792: my $keep_going = 1;
3793: my $user_input;
3794: while(($user_input = get_request) && $keep_going) {
3795: alarm(120);
3796: Debug("Main: Got $user_input\n");
3797: $keep_going = &process_request($user_input);
3798: alarm(0);
3799: &status('Listening to '.$clientname." ($keymode)");
3800: }
3801:
3802: # --------------------------------------------- client unknown or fishy, refuse
3803: } else {
3804: print $client "refused\n";
3805: $client->close();
3806: &logthis("<font color='blue'>WARNING: "
3807: ."Rejected client $clientip, closing connection</font>");
3808: }
3809: }
3810:
3811: # =============================================================================
3812:
3813: &logthis("<font color='red'>CRITICAL: "
3814: ."Disconnect from $clientip ($clientname)</font>");
3815:
3816:
3817: # this exit is VERY important, otherwise the child will become
3818: # a producer of more and more children, forking yourself into
3819: # process death.
3820: exit;
3821:
3822: }
3823:
3824:
3825: #
3826: # Checks to see if the input roleput request was to set
3827: # an author role. If so, invokes the lchtmldir script to set
3828: # up a correct public_html
3829: # Parameters:
3830: # request - The request sent to the rolesput subchunk.
3831: # We're looking for /domain/_au
3832: # domain - The domain in which the user is having roles doctored.
3833: # user - Name of the user for which the role is being put.
3834: # authtype - The authentication type associated with the user.
3835: #
3836: sub ManagePermissions
3837: {
3838:
3839: my ($request, $domain, $user, $authtype) = @_;
3840:
3841: # See if the request is of the form /$domain/_au
3842: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
3843: my $execdir = $perlvar{'lonDaemons'};
3844: my $userhome= "/home/$user" ;
3845: &logthis("system $execdir/lchtmldir $userhome $user $authtype");
3846: system("$execdir/lchtmldir $userhome $user $authtype");
3847: }
3848: }
3849: #
3850: # GetAuthType - Determines the authorization type of a user in a domain.
3851:
3852: # Returns the authorization type or nouser if there is no such user.
3853: #
3854: sub GetAuthType
3855: {
3856:
3857: my ($domain, $user) = @_;
3858:
3859: Debug("GetAuthType( $domain, $user ) \n");
3860: my $proname = &propath($domain, $user);
3861: my $passwdfile = "$proname/passwd";
3862: if( -e $passwdfile ) {
3863: my $pf = IO::File->new($passwdfile);
3864: my $realpassword = <$pf>;
3865: chomp($realpassword);
3866: Debug("Password info = $realpassword\n");
3867: my ($authtype, $contentpwd) = split(/:/, $realpassword);
3868: Debug("Authtype = $authtype, content = $contentpwd\n");
3869: my $availinfo = '';
3870: if($authtype eq 'krb4' or $authtype eq 'krb5') {
3871: $availinfo = $contentpwd;
3872: }
3873:
3874: return "$authtype:$availinfo";
3875: }
3876: else {
3877: Debug("Returning nouser");
3878: return "nouser";
3879: }
3880: }
3881:
3882: sub addline {
3883: my ($fname,$hostid,$ip,$newline)=@_;
3884: my $contents;
3885: my $found=0;
3886: my $expr='^'.$hostid.':'.$ip.':';
3887: $expr =~ s/\./\\\./g;
3888: my $sh;
3889: if ($sh=IO::File->new("$fname.subscription")) {
3890: while (my $subline=<$sh>) {
3891: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
3892: }
3893: $sh->close();
3894: }
3895: $sh=IO::File->new(">$fname.subscription");
3896: if ($contents) { print $sh $contents; }
3897: if ($newline) { print $sh $newline; }
3898: $sh->close();
3899: return $found;
3900: }
3901:
3902: sub getchat {
3903: my ($cdom,$cname,$udom,$uname)=@_;
3904: my %hash;
3905: my $proname=&propath($cdom,$cname);
3906: my @entries=();
3907: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
3908: &GDBM_READER(),0640)) {
3909: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
3910: untie %hash;
3911: }
3912: my @participants=();
3913: my $cutoff=time-60;
3914: if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db",
3915: &GDBM_WRCREAT(),0640)) {
3916: $hash{$uname.':'.$udom}=time;
3917: foreach (sort keys %hash) {
3918: if ($hash{$_}>$cutoff) {
3919: $participants[$#participants+1]='active_participant:'.$_;
3920: }
3921: }
3922: untie %hash;
3923: }
3924: return (@participants,@entries);
3925: }
3926:
3927: sub chatadd {
3928: my ($cdom,$cname,$newchat)=@_;
3929: my %hash;
3930: my $proname=&propath($cdom,$cname);
3931: my @entries=();
3932: my $time=time;
3933: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
3934: &GDBM_WRCREAT(),0640)) {
3935: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
3936: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
3937: my ($thentime,$idnum)=split(/\_/,$lastid);
3938: my $newid=$time.'_000000';
3939: if ($thentime==$time) {
3940: $idnum=~s/^0+//;
3941: $idnum++;
3942: $idnum=substr('000000'.$idnum,-6,6);
3943: $newid=$time.'_'.$idnum;
3944: }
3945: $hash{$newid}=$newchat;
3946: my $expired=$time-3600;
3947: foreach (keys %hash) {
3948: my ($thistime)=($_=~/(\d+)\_/);
3949: if ($thistime<$expired) {
3950: delete $hash{$_};
3951: }
3952: }
3953: untie %hash;
3954: }
3955: {
3956: my $hfh;
3957: if ($hfh=IO::File->new(">>$proname/chatroom.log")) {
3958: print $hfh "$time:".&unescape($newchat)."\n";
3959: }
3960: }
3961: }
3962:
3963: sub unsub {
3964: my ($fname,$clientip)=@_;
3965: my $result;
3966: my $unsubs = 0; # Number of successful unsubscribes:
3967:
3968:
3969: # An old way subscriptions were handled was to have a
3970: # subscription marker file:
3971:
3972: Debug("Attempting unlink of $fname.$clientname");
3973: if (unlink("$fname.$clientname")) {
3974: $unsubs++; # Successful unsub via marker file.
3975: }
3976:
3977: # The more modern way to do it is to have a subscription list
3978: # file:
3979:
3980: if (-e "$fname.subscription") {
3981: my $found=&addline($fname,$clientname,$clientip,'');
3982: if ($found) {
3983: $unsubs++;
3984: }
3985: }
3986:
3987: # If either or both of these mechanisms succeeded in unsubscribing a
3988: # resource we can return ok:
3989:
3990: if($unsubs) {
3991: $result = "ok\n";
3992: } else {
3993: $result = "not_subscribed\n";
3994: }
3995:
3996: return $result;
3997: }
3998:
3999: sub currentversion {
4000: my $fname=shift;
4001: my $version=-1;
4002: my $ulsdir='';
4003: if ($fname=~/^(.+)\/[^\/]+$/) {
4004: $ulsdir=$1;
4005: }
4006: my ($fnamere1,$fnamere2);
4007: # remove version if already specified
4008: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
4009: # get the bits that go before and after the version number
4010: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
4011: $fnamere1=$1;
4012: $fnamere2='.'.$2;
4013: }
4014: if (-e $fname) { $version=1; }
4015: if (-e $ulsdir) {
4016: if(-d $ulsdir) {
4017: if (opendir(LSDIR,$ulsdir)) {
4018: my $ulsfn;
4019: while ($ulsfn=readdir(LSDIR)) {
4020: # see if this is a regular file (ignore links produced earlier)
4021: my $thisfile=$ulsdir.'/'.$ulsfn;
4022: unless (-l $thisfile) {
4023: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
4024: if ($1>$version) { $version=$1; }
4025: }
4026: }
4027: }
4028: closedir(LSDIR);
4029: $version++;
4030: }
4031: }
4032: }
4033: return $version;
4034: }
4035:
4036: sub thisversion {
4037: my $fname=shift;
4038: my $version=-1;
4039: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
4040: $version=$1;
4041: }
4042: return $version;
4043: }
4044:
4045: sub subscribe {
4046: my ($userinput,$clientip)=@_;
4047: my $result;
4048: my ($cmd,$fname)=split(/:/,$userinput);
4049: my $ownership=&ishome($fname);
4050: if ($ownership eq 'owner') {
4051: # explitly asking for the current version?
4052: unless (-e $fname) {
4053: my $currentversion=¤tversion($fname);
4054: if (&thisversion($fname)==$currentversion) {
4055: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
4056: my $root=$1;
4057: my $extension=$2;
4058: symlink($root.'.'.$extension,
4059: $root.'.'.$currentversion.'.'.$extension);
4060: unless ($extension=~/\.meta$/) {
4061: symlink($root.'.'.$extension.'.meta',
4062: $root.'.'.$currentversion.'.'.$extension.'.meta');
4063: }
4064: }
4065: }
4066: }
4067: if (-e $fname) {
4068: if (-d $fname) {
4069: $result="directory\n";
4070: } else {
4071: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
4072: my $now=time;
4073: my $found=&addline($fname,$clientname,$clientip,
4074: "$clientname:$clientip:$now\n");
4075: if ($found) { $result="$fname\n"; }
4076: # if they were subscribed to only meta data, delete that
4077: # subscription, when you subscribe to a file you also get
4078: # the metadata
4079: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
4080: $fname=~s/\/home\/httpd\/html\/res/raw/;
4081: $fname="http://$thisserver/".$fname;
4082: $result="$fname\n";
4083: }
4084: } else {
4085: $result="not_found\n";
4086: }
4087: } else {
4088: $result="rejected\n";
4089: }
4090: return $result;
4091: }
4092:
4093: sub make_passwd_file {
4094: my ($uname, $umode,$npass,$passfilename)=@_;
4095: my $result="ok\n";
4096: if ($umode eq 'krb4' or $umode eq 'krb5') {
4097: {
4098: my $pf = IO::File->new(">$passfilename");
4099: print $pf "$umode:$npass\n";
4100: }
4101: } elsif ($umode eq 'internal') {
4102: my $salt=time;
4103: $salt=substr($salt,6,2);
4104: my $ncpass=crypt($npass,$salt);
4105: {
4106: &Debug("Creating internal auth");
4107: my $pf = IO::File->new(">$passfilename");
4108: print $pf "internal:$ncpass\n";
4109: }
4110: } elsif ($umode eq 'localauth') {
4111: {
4112: my $pf = IO::File->new(">$passfilename");
4113: print $pf "localauth:$npass\n";
4114: }
4115: } elsif ($umode eq 'unix') {
4116: {
4117: #
4118: # Don't allow the creation of privileged accounts!!! that would
4119: # be real bad!!!
4120: #
4121: my $uid = getpwnam($uname);
4122: if((defined $uid) && ($uid == 0)) {
4123: &logthis(">>>Attempted to create privilged account blocked");
4124: return "no_priv_account_error\n";
4125: }
4126:
4127: my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
4128: {
4129: &Debug("Executing external: ".$execpath);
4130: &Debug("user = ".$uname.", Password =". $npass);
4131: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
4132: print $se "$uname\n";
4133: print $se "$npass\n";
4134: print $se "$npass\n";
4135: }
4136: my $useraddok = $?;
4137: if($useraddok > 0) {
4138: &logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));
4139: }
4140: my $pf = IO::File->new(">$passfilename");
4141: print $pf "unix:\n";
4142: }
4143: } elsif ($umode eq 'none') {
4144: {
4145: my $pf = IO::File->new(">$passfilename");
4146: print $pf "none:\n";
4147: }
4148: } else {
4149: $result="auth_mode_error\n";
4150: }
4151: return $result;
4152: }
4153:
4154: sub sethost {
4155: my ($remotereq) = @_;
4156: my (undef,$hostid)=split(/:/,$remotereq);
4157: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
4158: if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
4159: $currenthostid =$hostid;
4160: $currentdomainid=$hostdom{$hostid};
4161: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
4162: } else {
4163: &logthis("Requested host id $hostid not an alias of ".
4164: $perlvar{'lonHostID'}." refusing connection");
4165: return 'unable_to_set';
4166: }
4167: return 'ok';
4168: }
4169:
4170: sub version {
4171: my ($userinput)=@_;
4172: $remoteVERSION=(split(/:/,$userinput))[1];
4173: return "version:$VERSION";
4174: }
4175:
4176: #There is a copy of this in lonnet.pm
4177: sub userload {
4178: my $numusers=0;
4179: {
4180: opendir(LONIDS,$perlvar{'lonIDsDir'});
4181: my $filename;
4182: my $curtime=time;
4183: while ($filename=readdir(LONIDS)) {
4184: if ($filename eq '.' || $filename eq '..') {next;}
4185: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
4186: if ($curtime-$mtime < 1800) { $numusers++; }
4187: }
4188: closedir(LONIDS);
4189: }
4190: my $userloadpercent=0;
4191: my $maxuserload=$perlvar{'lonUserLoadLim'};
4192: if ($maxuserload) {
4193: $userloadpercent=100*$numusers/$maxuserload;
4194: }
4195: $userloadpercent=sprintf("%.2f",$userloadpercent);
4196: return $userloadpercent;
4197: }
4198:
4199: # Routines for serializing arrays and hashes (copies from lonnet)
4200:
4201: sub array2str {
4202: my (@array) = @_;
4203: my $result=&arrayref2str(\@array);
4204: $result=~s/^__ARRAY_REF__//;
4205: $result=~s/__END_ARRAY_REF__$//;
4206: return $result;
4207: }
4208:
4209: sub arrayref2str {
4210: my ($arrayref) = @_;
4211: my $result='__ARRAY_REF__';
4212: foreach my $elem (@$arrayref) {
4213: if(ref($elem) eq 'ARRAY') {
4214: $result.=&arrayref2str($elem).'&';
4215: } elsif(ref($elem) eq 'HASH') {
4216: $result.=&hashref2str($elem).'&';
4217: } elsif(ref($elem)) {
4218: #print("Got a ref of ".(ref($elem))." skipping.");
4219: } else {
4220: $result.=&escape($elem).'&';
4221: }
4222: }
4223: $result=~s/\&$//;
4224: $result .= '__END_ARRAY_REF__';
4225: return $result;
4226: }
4227:
4228: sub hash2str {
4229: my (%hash) = @_;
4230: my $result=&hashref2str(\%hash);
4231: $result=~s/^__HASH_REF__//;
4232: $result=~s/__END_HASH_REF__$//;
4233: return $result;
4234: }
4235:
4236: sub hashref2str {
4237: my ($hashref)=@_;
4238: my $result='__HASH_REF__';
4239: foreach (sort(keys(%$hashref))) {
4240: if (ref($_) eq 'ARRAY') {
4241: $result.=&arrayref2str($_).'=';
4242: } elsif (ref($_) eq 'HASH') {
4243: $result.=&hashref2str($_).'=';
4244: } elsif (ref($_)) {
4245: $result.='=';
4246: #print("Got a ref of ".(ref($_))." skipping.");
4247: } else {
4248: if ($_) {$result.=&escape($_).'=';} else { last; }
4249: }
4250:
4251: if(ref($hashref->{$_}) eq 'ARRAY') {
4252: $result.=&arrayref2str($hashref->{$_}).'&';
4253: } elsif(ref($hashref->{$_}) eq 'HASH') {
4254: $result.=&hashref2str($hashref->{$_}).'&';
4255: } elsif(ref($hashref->{$_})) {
4256: $result.='&';
4257: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
4258: } else {
4259: $result.=&escape($hashref->{$_}).'&';
4260: }
4261: }
4262: $result=~s/\&$//;
4263: $result .= '__END_HASH_REF__';
4264: return $result;
4265: }
4266:
4267: # ----------------------------------- POD (plain old documentation, CPAN style)
4268:
4269: =head1 NAME
4270:
4271: lond - "LON Daemon" Server (port "LOND" 5663)
4272:
4273: =head1 SYNOPSIS
4274:
4275: Usage: B<lond>
4276:
4277: Should only be run as user=www. This is a command-line script which
4278: is invoked by B<loncron>. There is no expectation that a typical user
4279: will manually start B<lond> from the command-line. (In other words,
4280: DO NOT START B<lond> YOURSELF.)
4281:
4282: =head1 DESCRIPTION
4283:
4284: There are two characteristics associated with the running of B<lond>,
4285: PROCESS MANAGEMENT (starting, stopping, handling child processes)
4286: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
4287: subscriptions, etc). These are described in two large
4288: sections below.
4289:
4290: B<PROCESS MANAGEMENT>
4291:
4292: Preforker - server who forks first. Runs as a daemon. HUPs.
4293: Uses IDEA encryption
4294:
4295: B<lond> forks off children processes that correspond to the other servers
4296: in the network. Management of these processes can be done at the
4297: parent process level or the child process level.
4298:
4299: B<logs/lond.log> is the location of log messages.
4300:
4301: The process management is now explained in terms of linux shell commands,
4302: subroutines internal to this code, and signal assignments:
4303:
4304: =over 4
4305:
4306: =item *
4307:
4308: PID is stored in B<logs/lond.pid>
4309:
4310: This is the process id number of the parent B<lond> process.
4311:
4312: =item *
4313:
4314: SIGTERM and SIGINT
4315:
4316: Parent signal assignment:
4317: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
4318:
4319: Child signal assignment:
4320: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
4321: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
4322: to restart a new child.)
4323:
4324: Command-line invocations:
4325: B<kill> B<-s> SIGTERM I<PID>
4326: B<kill> B<-s> SIGINT I<PID>
4327:
4328: Subroutine B<HUNTSMAN>:
4329: This is only invoked for the B<lond> parent I<PID>.
4330: This kills all the children, and then the parent.
4331: The B<lonc.pid> file is cleared.
4332:
4333: =item *
4334:
4335: SIGHUP
4336:
4337: Current bug:
4338: This signal can only be processed the first time
4339: on the parent process. Subsequent SIGHUP signals
4340: have no effect.
4341:
4342: Parent signal assignment:
4343: $SIG{HUP} = \&HUPSMAN;
4344:
4345: Child signal assignment:
4346: none (nothing happens)
4347:
4348: Command-line invocations:
4349: B<kill> B<-s> SIGHUP I<PID>
4350:
4351: Subroutine B<HUPSMAN>:
4352: This is only invoked for the B<lond> parent I<PID>,
4353: This kills all the children, and then the parent.
4354: The B<lond.pid> file is cleared.
4355:
4356: =item *
4357:
4358: SIGUSR1
4359:
4360: Parent signal assignment:
4361: $SIG{USR1} = \&USRMAN;
4362:
4363: Child signal assignment:
4364: $SIG{USR1}= \&logstatus;
4365:
4366: Command-line invocations:
4367: B<kill> B<-s> SIGUSR1 I<PID>
4368:
4369: Subroutine B<USRMAN>:
4370: When invoked for the B<lond> parent I<PID>,
4371: SIGUSR1 is sent to all the children, and the status of
4372: each connection is logged.
4373:
4374: =item *
4375:
4376: SIGUSR2
4377:
4378: Parent Signal assignment:
4379: $SIG{USR2} = \&UpdateHosts
4380:
4381: Child signal assignment:
4382: NONE
4383:
4384:
4385: =item *
4386:
4387: SIGCHLD
4388:
4389: Parent signal assignment:
4390: $SIG{CHLD} = \&REAPER;
4391:
4392: Child signal assignment:
4393: none
4394:
4395: Command-line invocations:
4396: B<kill> B<-s> SIGCHLD I<PID>
4397:
4398: Subroutine B<REAPER>:
4399: This is only invoked for the B<lond> parent I<PID>.
4400: Information pertaining to the child is removed.
4401: The socket port is cleaned up.
4402:
4403: =back
4404:
4405: B<SERVER-SIDE ACTIVITIES>
4406:
4407: Server-side information can be accepted in an encrypted or non-encrypted
4408: method.
4409:
4410: =over 4
4411:
4412: =item ping
4413:
4414: Query a client in the hosts.tab table; "Are you there?"
4415:
4416: =item pong
4417:
4418: Respond to a ping query.
4419:
4420: =item ekey
4421:
4422: Read in encrypted key, make cipher. Respond with a buildkey.
4423:
4424: =item load
4425:
4426: Respond with CPU load based on a computation upon /proc/loadavg.
4427:
4428: =item currentauth
4429:
4430: Reply with current authentication information (only over an
4431: encrypted channel).
4432:
4433: =item auth
4434:
4435: Only over an encrypted channel, reply as to whether a user's
4436: authentication information can be validated.
4437:
4438: =item passwd
4439:
4440: Allow for a password to be set.
4441:
4442: =item makeuser
4443:
4444: Make a user.
4445:
4446: =item passwd
4447:
4448: Allow for authentication mechanism and password to be changed.
4449:
4450: =item home
4451:
4452: Respond to a question "are you the home for a given user?"
4453:
4454: =item update
4455:
4456: Update contents of a subscribed resource.
4457:
4458: =item unsubscribe
4459:
4460: The server is unsubscribing from a resource.
4461:
4462: =item subscribe
4463:
4464: The server is subscribing to a resource.
4465:
4466: =item log
4467:
4468: Place in B<logs/lond.log>
4469:
4470: =item put
4471:
4472: stores hash in namespace
4473:
4474: =item rolesput
4475:
4476: put a role into a user's environment
4477:
4478: =item get
4479:
4480: returns hash with keys from array
4481: reference filled in from namespace
4482:
4483: =item eget
4484:
4485: returns hash with keys from array
4486: reference filled in from namesp (encrypts the return communication)
4487:
4488: =item rolesget
4489:
4490: get a role from a user's environment
4491:
4492: =item del
4493:
4494: deletes keys out of array from namespace
4495:
4496: =item keys
4497:
4498: returns namespace keys
4499:
4500: =item dump
4501:
4502: dumps the complete (or key matching regexp) namespace into a hash
4503:
4504: =item store
4505:
4506: stores hash permanently
4507: for this url; hashref needs to be given and should be a \%hashname; the
4508: remaining args aren't required and if they aren't passed or are '' they will
4509: be derived from the ENV
4510:
4511: =item restore
4512:
4513: returns a hash for a given url
4514:
4515: =item querysend
4516:
4517: Tells client about the lonsql process that has been launched in response
4518: to a sent query.
4519:
4520: =item queryreply
4521:
4522: Accept information from lonsql and make appropriate storage in temporary
4523: file space.
4524:
4525: =item idput
4526:
4527: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
4528: for each student, defined perhaps by the institutional Registrar.)
4529:
4530: =item idget
4531:
4532: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
4533: for each student, defined perhaps by the institutional Registrar.)
4534:
4535: =item tmpput
4536:
4537: Accept and store information in temporary space.
4538:
4539: =item tmpget
4540:
4541: Send along temporarily stored information.
4542:
4543: =item ls
4544:
4545: List part of a user's directory.
4546:
4547: =item pushtable
4548:
4549: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
4550: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
4551: must be restored manually in case of a problem with the new table file.
4552: pushtable requires that the request be encrypted and validated via
4553: ValidateManager. The form of the command is:
4554: enc:pushtable tablename <tablecontents> \n
4555: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
4556: cleartext newline.
4557:
4558: =item Hanging up (exit or init)
4559:
4560: What to do when a client tells the server that they (the client)
4561: are leaving the network.
4562:
4563: =item unknown command
4564:
4565: If B<lond> is sent an unknown command (not in the list above),
4566: it replys to the client "unknown_cmd".
4567:
4568:
4569: =item UNKNOWN CLIENT
4570:
4571: If the anti-spoofing algorithm cannot verify the client,
4572: the client is rejected (with a "refused" message sent
4573: to the client, and the connection is closed.
4574:
4575: =back
4576:
4577: =head1 PREREQUISITES
4578:
4579: IO::Socket
4580: IO::File
4581: Apache::File
4582: Symbol
4583: POSIX
4584: Crypt::IDEA
4585: LWP::UserAgent()
4586: GDBM_File
4587: Authen::Krb4
4588: Authen::Krb5
4589:
4590: =head1 COREQUISITES
4591:
4592: =head1 OSNAMES
4593:
4594: linux
4595:
4596: =head1 SCRIPT CATEGORIES
4597:
4598: Server/Process
4599:
4600: =cut
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to lond CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom