1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.219 2004/07/29 22:31:18 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: 1.219 $'; #' 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: return 1;
1285: }
1286: ®ister_handler("pushfile", \&push_file_handler, 1, 0, 1);
1287:
1288:
1289:
1290: # Process a reinit request. Reinit requests that either
1291: # lonc or lond be reinitialized so that an updated
1292: # host.tab or domain.tab can be processed.
1293: #
1294: # Parameters:
1295: # $cmd - the actual keyword that invoked us.
1296: # $tail - the tail of the request that invoked us.
1297: # $client - File descriptor connected to the client
1298: # Returns:
1299: # 1 - Ok to continue processing.
1300: # 0 - Program should exit
1301: # Implicit output:
1302: # a reply is sent to the client.
1303: #
1304: sub reinit_process_handler {
1305: my ($cmd, $tail, $client) = @_;
1306:
1307: my $userinput = "$cmd:$tail";
1308:
1309: my $cert = &GetCertificate($userinput);
1310: if(&ValidManager($cert)) {
1311: chomp($userinput);
1312: my $reply = &ReinitProcess($userinput);
1313: &Reply( $client, "$reply\n", $userinput);
1314: } else {
1315: &Failure( $client, "refused\n", $userinput);
1316: }
1317: return 1;
1318: }
1319:
1320: ®ister_handler("reinit", \&reinit_process_handler, 1, 0, 1);
1321:
1322: # Process the editing script for a table edit operation.
1323: # the editing operation must be encrypted and requested by
1324: # a manager host.
1325: #
1326: # Parameters:
1327: # $cmd - the actual keyword that invoked us.
1328: # $tail - the tail of the request that invoked us.
1329: # $client - File descriptor connected to the client
1330: # Returns:
1331: # 1 - Ok to continue processing.
1332: # 0 - Program should exit
1333: # Implicit output:
1334: # a reply is sent to the client.
1335: #
1336: sub edit_table_handler {
1337: my ($command, $tail, $client) = @_;
1338:
1339: my $userinput = "$command:$tail";
1340:
1341: my $cert = &GetCertificate($userinput);
1342: if(&ValidManager($cert)) {
1343: my($filetype, $script) = split(/:/, $tail);
1344: if (($filetype eq "hosts") ||
1345: ($filetype eq "domain")) {
1346: if($script ne "") {
1347: &Reply($client, # BUGBUG - EditFile
1348: &EditFile($userinput), # could fail.
1349: $userinput);
1350: } else {
1351: &Failure($client,"refused\n",$userinput);
1352: }
1353: } else {
1354: &Failure($client,"refused\n",$userinput);
1355: }
1356: } else {
1357: &Failure($client,"refused\n",$userinput);
1358: }
1359: return 1;
1360: }
1361: register_handler("edit", \&edit_table_handler, 1, 0, 1);
1362:
1363:
1364:
1365:
1366: #---------------------------------------------------------------
1367: #
1368: # Getting, decoding and dispatching requests:
1369: #
1370:
1371: #
1372: # Get a Request:
1373: # Gets a Request message from the client. The transaction
1374: # is defined as a 'line' of text. We remove the new line
1375: # from the text line.
1376: #
1377: sub get_request {
1378: my $input = <$client>;
1379: chomp($input);
1380:
1381: Debug("get_request: Request = $input\n");
1382:
1383: &status('Processing '.$clientname.':'.$input);
1384:
1385: return $input;
1386: }
1387: #---------------------------------------------------------------
1388: #
1389: # Process a request. This sub should shrink as each action
1390: # gets farmed out into a separat sub that is registered
1391: # with the dispatch hash.
1392: #
1393: # Parameters:
1394: # user_input - The request received from the client (lonc).
1395: # Returns:
1396: # true to keep processing, false if caller should exit.
1397: #
1398: sub process_request {
1399: my ($userinput) = @_; # Easier for now to break style than to
1400: # fix all the userinput -> user_input.
1401: my $wasenc = 0; # True if request was encrypted.
1402: # ------------------------------------------------------------ See if encrypted
1403: if ($userinput =~ /^enc/) {
1404: $userinput = decipher($userinput);
1405: $wasenc=1;
1406: if(!$userinput) { # Cipher not defined.
1407: &Failure($client, "error: Encrypted data without negotated key");
1408: return 0;
1409: }
1410: }
1411: Debug("process_request: $userinput\n");
1412:
1413: #
1414: # The 'correct way' to add a command to lond is now to
1415: # write a sub to execute it and Add it to the command dispatch
1416: # hash via a call to register_handler.. The comments to that
1417: # sub should give you enough to go on to show how to do this
1418: # along with the examples that are building up as this code
1419: # is getting refactored. Until all branches of the
1420: # if/elseif monster below have been factored out into
1421: # separate procesor subs, if the dispatch hash is missing
1422: # the command keyword, we will fall through to the remainder
1423: # of the if/else chain below in order to keep this thing in
1424: # working order throughout the transmogrification.
1425:
1426: my ($command, $tail) = split(/:/, $userinput, 2);
1427: chomp($command);
1428: chomp($tail);
1429: $tail =~ s/(\r)//; # This helps people debugging with e.g. telnet.
1430: $command =~ s/(\r)//; # And this too for parameterless commands.
1431: if(!$tail) {
1432: $tail =""; # defined but blank.
1433: }
1434:
1435: &Debug("Command received: $command, encoded = $wasenc");
1436:
1437: if(defined $Dispatcher{$command}) {
1438:
1439: my $dispatch_info = $Dispatcher{$command};
1440: my $handler = $$dispatch_info[0];
1441: my $need_encode = $$dispatch_info[1];
1442: my $client_types = $$dispatch_info[2];
1443: Debug("Matched dispatch hash: mustencode: $need_encode "
1444: ."ClientType $client_types");
1445:
1446: # Validate the request:
1447:
1448: my $ok = 1;
1449: my $requesterprivs = 0;
1450: if(&isClient()) {
1451: $requesterprivs |= $CLIENT_OK;
1452: }
1453: if(&isManager()) {
1454: $requesterprivs |= $MANAGER_OK;
1455: }
1456: if($need_encode && (!$wasenc)) {
1457: Debug("Must encode but wasn't: $need_encode $wasenc");
1458: $ok = 0;
1459: }
1460: if(($client_types & $requesterprivs) == 0) {
1461: Debug("Client not privileged to do this operation");
1462: $ok = 0;
1463: }
1464:
1465: if($ok) {
1466: Debug("Dispatching to handler $command $tail");
1467: my $keep_going = &$handler($command, $tail, $client);
1468: return $keep_going;
1469: } else {
1470: Debug("Refusing to dispatch because client did not match requirements");
1471: Failure($client, "refused\n", $userinput);
1472: return 1;
1473: }
1474:
1475: }
1476:
1477: #------------------- Commands not yet in spearate handlers. --------------
1478:
1479:
1480: # ------------------------------------------------------------------------ auth
1481: if ($userinput =~ /^auth/) { # Encoded and client only.
1482: if (($wasenc==1) && isClient) {
1483: my ($cmd,$udom,$uname,$upass)=split(/:/,$userinput);
1484: chomp($upass);
1485: $upass=unescape($upass);
1486: my $proname=propath($udom,$uname);
1487: my $passfilename="$proname/passwd";
1488: if (-e $passfilename) {
1489: my $pf = IO::File->new($passfilename);
1490: my $realpasswd=<$pf>;
1491: chomp($realpasswd);
1492: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1493: my $pwdcorrect=0;
1494: if ($howpwd eq 'internal') {
1495: &Debug("Internal auth");
1496: $pwdcorrect=
1497: (crypt($upass,$contentpwd) eq $contentpwd);
1498: } elsif ($howpwd eq 'unix') {
1499: &Debug("Unix auth");
1500: if((getpwnam($uname))[1] eq "") { #no such user!
1501: $pwdcorrect = 0;
1502: } else {
1503: $contentpwd=(getpwnam($uname))[1];
1504: my $pwauth_path="/usr/local/sbin/pwauth";
1505: unless ($contentpwd eq 'x') {
1506: $pwdcorrect=
1507: (crypt($upass,$contentpwd) eq
1508: $contentpwd);
1509: }
1510:
1511: elsif (-e $pwauth_path) {
1512: open PWAUTH, "|$pwauth_path" or
1513: die "Cannot invoke authentication";
1514: print PWAUTH "$uname\n$upass\n";
1515: close PWAUTH;
1516: $pwdcorrect=!$?;
1517: }
1518: }
1519: } elsif ($howpwd eq 'krb4') {
1520: my $null=pack("C",0);
1521: unless ($upass=~/$null/) {
1522: my $krb4_error = &Authen::Krb4::get_pw_in_tkt
1523: ($uname,"",$contentpwd,'krbtgt',
1524: $contentpwd,1,$upass);
1525: if (!$krb4_error) {
1526: $pwdcorrect = 1;
1527: } else {
1528: $pwdcorrect=0;
1529: # log error if it is not a bad password
1530: if ($krb4_error != 62) {
1531: &logthis('krb4:'.$uname.','.
1532: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
1533: }
1534: }
1535: }
1536: } elsif ($howpwd eq 'krb5') {
1537: my $null=pack("C",0);
1538: unless ($upass=~/$null/) {
1539: my $krbclient=&Authen::Krb5::parse_name($uname.'@'.$contentpwd);
1540: my $krbservice="krbtgt/".$contentpwd."\@".$contentpwd;
1541: my $krbserver=&Authen::Krb5::parse_name($krbservice);
1542: my $credentials=&Authen::Krb5::cc_default();
1543: $credentials->initialize($krbclient);
1544: my $krbreturn =
1545: &Authen::Krb5::get_in_tkt_with_password(
1546: $krbclient,$krbserver,$upass,$credentials);
1547: # unless ($krbreturn) {
1548: # &logthis("Krb5 Error: ".
1549: # &Authen::Krb5::error());
1550: # }
1551: $pwdcorrect = ($krbreturn == 1);
1552: } else { $pwdcorrect=0; }
1553: } elsif ($howpwd eq 'localauth') {
1554: $pwdcorrect=&localauth::localauth($uname,$upass,
1555: $contentpwd);
1556: }
1557: if ($pwdcorrect) {
1558: print $client "authorized\n";
1559: } else {
1560: print $client "non_authorized\n";
1561: }
1562: } else {
1563: print $client "unknown_user\n";
1564: }
1565: } else {
1566: Reply($client, "refused\n", $userinput);
1567:
1568: }
1569: # ---------------------------------------------------------------------- passwd
1570: } elsif ($userinput =~ /^passwd/) { # encoded and client
1571: if (($wasenc==1) && isClient) {
1572: my
1573: ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
1574: chomp($npass);
1575: $upass=&unescape($upass);
1576: $npass=&unescape($npass);
1577: &Debug("Trying to change password for $uname");
1578: my $proname=propath($udom,$uname);
1579: my $passfilename="$proname/passwd";
1580: if (-e $passfilename) {
1581: my $realpasswd;
1582: { my $pf = IO::File->new($passfilename);
1583: $realpasswd=<$pf>; }
1584: chomp($realpasswd);
1585: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1586: if ($howpwd eq 'internal') {
1587: &Debug("internal auth");
1588: if (crypt($upass,$contentpwd) eq $contentpwd) {
1589: my $salt=time;
1590: $salt=substr($salt,6,2);
1591: my $ncpass=crypt($npass,$salt);
1592: {
1593: my $pf;
1594: if ($pf = IO::File->new(">$passfilename")) {
1595: print $pf "internal:$ncpass\n";
1596: &logthis("Result of password change for $uname: pwchange_success");
1597: print $client "ok\n";
1598: } else {
1599: &logthis("Unable to open $uname passwd to change password");
1600: print $client "non_authorized\n";
1601: }
1602: }
1603:
1604: } else {
1605: print $client "non_authorized\n";
1606: }
1607: } elsif ($howpwd eq 'unix') {
1608: # Unix means we have to access /etc/password
1609: # one way or another.
1610: # First: Make sure the current password is
1611: # correct
1612: &Debug("auth is unix");
1613: $contentpwd=(getpwnam($uname))[1];
1614: my $pwdcorrect = "0";
1615: my $pwauth_path="/usr/local/sbin/pwauth";
1616: unless ($contentpwd eq 'x') {
1617: $pwdcorrect=
1618: (crypt($upass,$contentpwd) eq $contentpwd);
1619: } elsif (-e $pwauth_path) {
1620: open PWAUTH, "|$pwauth_path" or
1621: die "Cannot invoke authentication";
1622: print PWAUTH "$uname\n$upass\n";
1623: close PWAUTH;
1624: &Debug("exited pwauth with $? ($uname,$upass) ");
1625: $pwdcorrect=($? == 0);
1626: }
1627: if ($pwdcorrect) {
1628: my $execdir=$perlvar{'lonDaemons'};
1629: &Debug("Opening lcpasswd pipeline");
1630: my $pf = IO::File->new("|$execdir/lcpasswd > $perlvar{'lonDaemons'}/logs/lcpasswd.log");
1631: print $pf "$uname\n$npass\n$npass\n";
1632: close $pf;
1633: my $err = $?;
1634: my $result = ($err>0 ? 'pwchange_failure'
1635: : 'ok');
1636: &logthis("Result of password change for $uname: ".
1637: &lcpasswdstrerror($?));
1638: print $client "$result\n";
1639: } else {
1640: print $client "non_authorized\n";
1641: }
1642: } else {
1643: print $client "auth_mode_error\n";
1644: }
1645: } else {
1646: print $client "unknown_user\n";
1647: }
1648: } else {
1649: Reply($client, "refused\n", $userinput);
1650:
1651: }
1652: # -------------------------------------------------------------------- makeuser
1653: } elsif ($userinput =~ /^makeuser/) { # encoded and client.
1654: &Debug("Make user received");
1655: my $oldumask=umask(0077);
1656: if (($wasenc==1) && isClient) {
1657: my
1658: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
1659: &Debug("cmd =".$cmd." $udom =".$udom.
1660: " uname=".$uname);
1661: chomp($npass);
1662: $npass=&unescape($npass);
1663: my $proname=propath($udom,$uname);
1664: my $passfilename="$proname/passwd";
1665: &Debug("Password file created will be:".
1666: $passfilename);
1667: if (-e $passfilename) {
1668: print $client "already_exists\n";
1669: } elsif ($udom ne $currentdomainid) {
1670: print $client "not_right_domain\n";
1671: } else {
1672: my @fpparts=split(/\//,$proname);
1673: my $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
1674: my $fperror='';
1675: for (my $i=3;$i<=$#fpparts;$i++) {
1676: $fpnow.='/'.$fpparts[$i];
1677: unless (-e $fpnow) {
1678: unless (mkdir($fpnow,0777)) {
1679: $fperror="error: ".($!+0)
1680: ." mkdir failed while attempting "
1681: ."makeuser";
1682: }
1683: }
1684: }
1685: unless ($fperror) {
1686: my $result=&make_passwd_file($uname, $umode,$npass,
1687: $passfilename);
1688: print $client $result;
1689: } else {
1690: print $client "$fperror\n";
1691: }
1692: }
1693: } else {
1694: Reply($client, "refused\n", $userinput);
1695:
1696: }
1697: umask($oldumask);
1698: # -------------------------------------------------------------- changeuserauth
1699: } elsif ($userinput =~ /^changeuserauth/) { # encoded & client
1700: &Debug("Changing authorization");
1701: if (($wasenc==1) && isClient) {
1702: my
1703: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
1704: chomp($npass);
1705: &Debug("cmd = ".$cmd." domain= ".$udom.
1706: "uname =".$uname." umode= ".$umode);
1707: $npass=&unescape($npass);
1708: my $proname=&propath($udom,$uname);
1709: my $passfilename="$proname/passwd";
1710: if ($udom ne $currentdomainid) {
1711: print $client "not_right_domain\n";
1712: } else {
1713: my $result=&make_passwd_file($uname, $umode,$npass,
1714: $passfilename);
1715: print $client $result;
1716: }
1717: } else {
1718: Reply($client, "refused\n", $userinput);
1719:
1720: }
1721: # ------------------------------------------------------------------------ home
1722: } elsif ($userinput =~ /^home/) { # client clear or encoded
1723: if(isClient) {
1724: my ($cmd,$udom,$uname)=split(/:/,$userinput);
1725: chomp($uname);
1726: my $proname=propath($udom,$uname);
1727: if (-e $proname) {
1728: print $client "found\n";
1729: } else {
1730: print $client "not_found\n";
1731: }
1732: } else {
1733: Reply($client, "refused\n", $userinput);
1734:
1735: }
1736: # ---------------------------------------------------------------------- update
1737: } elsif ($userinput =~ /^update/) { # client clear or encoded.
1738: if(isClient) {
1739: my ($cmd,$fname)=split(/:/,$userinput);
1740: my $ownership=ishome($fname);
1741: if ($ownership eq 'not_owner') {
1742: if (-e $fname) {
1743: my ($dev,$ino,$mode,$nlink,
1744: $uid,$gid,$rdev,$size,
1745: $atime,$mtime,$ctime,
1746: $blksize,$blocks)=stat($fname);
1747: my $now=time;
1748: my $since=$now-$atime;
1749: if ($since>$perlvar{'lonExpire'}) {
1750: my $reply=
1751: &reply("unsub:$fname","$clientname");
1752: unlink("$fname");
1753: } else {
1754: my $transname="$fname.in.transfer";
1755: my $remoteurl=
1756: &reply("sub:$fname","$clientname");
1757: my $response;
1758: {
1759: my $ua=new LWP::UserAgent;
1760: my $request=new HTTP::Request('GET',"$remoteurl");
1761: $response=$ua->request($request,$transname);
1762: }
1763: if ($response->is_error()) {
1764: unlink($transname);
1765: my $message=$response->status_line;
1766: &logthis(
1767: "LWP GET: $message for $fname ($remoteurl)");
1768: } else {
1769: if ($remoteurl!~/\.meta$/) {
1770: my $ua=new LWP::UserAgent;
1771: my $mrequest=
1772: new HTTP::Request('GET',$remoteurl.'.meta');
1773: my $mresponse=
1774: $ua->request($mrequest,$fname.'.meta');
1775: if ($mresponse->is_error()) {
1776: unlink($fname.'.meta');
1777: }
1778: }
1779: rename($transname,$fname);
1780: }
1781: }
1782: print $client "ok\n";
1783: } else {
1784: print $client "not_found\n";
1785: }
1786: } else {
1787: print $client "rejected\n";
1788: }
1789: } else {
1790: Reply($client, "refused\n", $userinput);
1791:
1792: }
1793: # -------------------------------------- fetch a user file from a remote server
1794: } elsif ($userinput =~ /^fetchuserfile/) { # Client clear or enc.
1795: if(isClient) {
1796: my ($cmd,$fname)=split(/:/,$userinput);
1797: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
1798: my $udir=propath($udom,$uname).'/userfiles';
1799: unless (-e $udir) { mkdir($udir,0770); }
1800: if (-e $udir) {
1801: $ufile=~s/^[\.\~]+//;
1802: my $path = $udir;
1803: if ($ufile =~m|(.+)/([^/]+)$|) {
1804: my @parts=split('/',$1);
1805: foreach my $part (@parts) {
1806: $path .= '/'.$part;
1807: if ((-e $path)!=1) {
1808: mkdir($path,0770);
1809: }
1810: }
1811: }
1812: my $destname=$udir.'/'.$ufile;
1813: my $transname=$udir.'/'.$ufile.'.in.transit';
1814: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
1815: my $response;
1816: {
1817: my $ua=new LWP::UserAgent;
1818: my $request=new HTTP::Request('GET',"$remoteurl");
1819: $response=$ua->request($request,$transname);
1820: }
1821: if ($response->is_error()) {
1822: unlink($transname);
1823: my $message=$response->status_line;
1824: &logthis("LWP GET: $message for $fname ($remoteurl)");
1825: print $client "failed\n";
1826: } else {
1827: if (!rename($transname,$destname)) {
1828: &logthis("Unable to move $transname to $destname");
1829: unlink($transname);
1830: print $client "failed\n";
1831: } else {
1832: print $client "ok\n";
1833: }
1834: }
1835: } else {
1836: print $client "not_home\n";
1837: }
1838: } else {
1839: Reply($client, "refused\n", $userinput);
1840: }
1841: # --------------------------------------------------------- remove a user file
1842: } elsif ($userinput =~ /^removeuserfile/) { # Client clear or enc.
1843: if(isClient) {
1844: my ($cmd,$fname)=split(/:/,$userinput);
1845: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
1846: &logthis("$udom - $uname - $ufile");
1847: if ($ufile =~m|/\.\./|) {
1848: # any files paths with /../ in them refuse
1849: # to deal with
1850: print $client "refused\n";
1851: } else {
1852: my $udir=propath($udom,$uname);
1853: if (-e $udir) {
1854: my $file=$udir.'/userfiles/'.$ufile;
1855: if (-e $file) {
1856: unlink($file);
1857: if (-e $file) {
1858: print $client "failed\n";
1859: } else {
1860: print $client "ok\n";
1861: }
1862: } else {
1863: print $client "not_found\n";
1864: }
1865: } else {
1866: print $client "not_home\n";
1867: }
1868: }
1869: } else {
1870: Reply($client, "refused\n", $userinput);
1871: }
1872: # ------------------------------------------ authenticate access to a user file
1873: } elsif ($userinput =~ /^tokenauthuserfile/) { # Client only
1874: if(isClient) {
1875: my ($cmd,$fname,$session)=split(/:/,$userinput);
1876: chomp($session);
1877: my $reply='non_auth';
1878: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
1879: $session.'.id')) {
1880: while (my $line=<ENVIN>) {
1881: if ($line=~ m|userfile\.\Q$fname\E\=|) { $reply='ok'; }
1882: }
1883: close(ENVIN);
1884: print $client $reply."\n";
1885: } else {
1886: print $client "invalid_token\n";
1887: }
1888: } else {
1889: Reply($client, "refused\n", $userinput);
1890:
1891: }
1892: # ----------------------------------------------------------------- unsubscribe
1893: } elsif ($userinput =~ /^unsub/) {
1894: if(isClient) {
1895: my ($cmd,$fname)=split(/:/,$userinput);
1896: if (-e $fname) {
1897: print $client &unsub($fname,$clientip);
1898: } else {
1899: print $client "not_found\n";
1900: }
1901: } else {
1902: Reply($client, "refused\n", $userinput);
1903:
1904: }
1905: # ------------------------------------------------------------------- subscribe
1906: } elsif ($userinput =~ /^sub/) {
1907: if(isClient) {
1908: print $client &subscribe($userinput,$clientip);
1909: } else {
1910: Reply($client, "refused\n", $userinput);
1911:
1912: }
1913: # ------------------------------------------------------------- current version
1914: } elsif ($userinput =~ /^currentversion/) {
1915: if(isClient) {
1916: my ($cmd,$fname)=split(/:/,$userinput);
1917: print $client ¤tversion($fname)."\n";
1918: } else {
1919: Reply($client, "refused\n", $userinput);
1920:
1921: }
1922: # ------------------------------------------------------------------------- log
1923: } elsif ($userinput =~ /^log/) {
1924: if(isClient) {
1925: my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
1926: chomp($what);
1927: my $proname=propath($udom,$uname);
1928: my $now=time;
1929: {
1930: my $hfh;
1931: if ($hfh=IO::File->new(">>$proname/activity.log")) {
1932: print $hfh "$now:$clientname:$what\n";
1933: print $client "ok\n";
1934: } else {
1935: print $client "error: ".($!+0)
1936: ." IO::File->new Failed "
1937: ."while attempting log\n";
1938: }
1939: }
1940: } else {
1941: Reply($client, "refused\n", $userinput);
1942:
1943: }
1944: # ------------------------------------------------------------------------- put
1945: } elsif ($userinput =~ /^put/) {
1946: if(isClient) {
1947: my ($cmd,$udom,$uname,$namespace,$what)
1948: =split(/:/,$userinput,5);
1949: $namespace=~s/\//\_/g;
1950: $namespace=~s/\W//g;
1951: if ($namespace ne 'roles') {
1952: chomp($what);
1953: my $proname=propath($udom,$uname);
1954: my $now=time;
1955: my @pairs=split(/\&/,$what);
1956: my %hash;
1957: if (tie(%hash,'GDBM_File',
1958: "$proname/$namespace.db",
1959: &GDBM_WRCREAT(),0640)) {
1960: unless ($namespace=~/^nohist\_/) {
1961: my $hfh;
1962: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) { print $hfh "P:$now:$what\n"; }
1963: }
1964:
1965: foreach my $pair (@pairs) {
1966: my ($key,$value)=split(/=/,$pair);
1967: $hash{$key}=$value;
1968: }
1969: if (untie(%hash)) {
1970: print $client "ok\n";
1971: } else {
1972: print $client "error: ".($!+0)
1973: ." untie(GDBM) failed ".
1974: "while attempting put\n";
1975: }
1976: } else {
1977: print $client "error: ".($!)
1978: ." tie(GDBM) Failed ".
1979: "while attempting put\n";
1980: }
1981: } else {
1982: print $client "refused\n";
1983: }
1984: } else {
1985: Reply($client, "refused\n", $userinput);
1986:
1987: }
1988: # ------------------------------------------------------------------- inc
1989: } elsif ($userinput =~ /^inc:/) {
1990: if(isClient) {
1991: my ($cmd,$udom,$uname,$namespace,$what)
1992: =split(/:/,$userinput);
1993: $namespace=~s/\//\_/g;
1994: $namespace=~s/\W//g;
1995: if ($namespace ne 'roles') {
1996: chomp($what);
1997: my $proname=propath($udom,$uname);
1998: my $now=time;
1999: my @pairs=split(/\&/,$what);
2000: my %hash;
2001: if (tie(%hash,'GDBM_File',
2002: "$proname/$namespace.db",
2003: &GDBM_WRCREAT(),0640)) {
2004: unless ($namespace=~/^nohist\_/) {
2005: my $hfh;
2006: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) { print $hfh "P:$now:$what\n"; }
2007: }
2008: foreach my $pair (@pairs) {
2009: my ($key,$value)=split(/=/,$pair);
2010: # We could check that we have a number...
2011: if (! defined($value) || $value eq '') {
2012: $value = 1;
2013: }
2014: $hash{$key}+=$value;
2015: }
2016: if (untie(%hash)) {
2017: print $client "ok\n";
2018: } else {
2019: print $client "error: ".($!+0)
2020: ." untie(GDBM) failed ".
2021: "while attempting inc\n";
2022: }
2023: } else {
2024: print $client "error: ".($!)
2025: ." tie(GDBM) Failed ".
2026: "while attempting inc\n";
2027: }
2028: } else {
2029: print $client "refused\n";
2030: }
2031: } else {
2032: Reply($client, "refused\n", $userinput);
2033:
2034: }
2035: # -------------------------------------------------------------------- rolesput
2036: } elsif ($userinput =~ /^rolesput/) {
2037: if(isClient) {
2038: &Debug("rolesput");
2039: if ($wasenc==1) {
2040: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
2041: =split(/:/,$userinput);
2042: &Debug("cmd = ".$cmd." exedom= ".$exedom.
2043: "user = ".$exeuser." udom=".$udom.
2044: "what = ".$what);
2045: my $namespace='roles';
2046: chomp($what);
2047: my $proname=propath($udom,$uname);
2048: my $now=time;
2049: my @pairs=split(/\&/,$what);
2050: my %hash;
2051: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2052: {
2053: my $hfh;
2054: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) {
2055: print $hfh "P:$now:$exedom:$exeuser:$what\n";
2056: }
2057: }
2058:
2059: foreach my $pair (@pairs) {
2060: my ($key,$value)=split(/=/,$pair);
2061: &ManagePermissions($key, $udom, $uname,
2062: &GetAuthType( $udom,
2063: $uname));
2064: $hash{$key}=$value;
2065: }
2066: if (untie(%hash)) {
2067: print $client "ok\n";
2068: } else {
2069: print $client "error: ".($!+0)
2070: ." untie(GDBM) Failed ".
2071: "while attempting rolesput\n";
2072: }
2073: } else {
2074: print $client "error: ".($!+0)
2075: ." tie(GDBM) Failed ".
2076: "while attempting rolesput\n";
2077: }
2078: } else {
2079: print $client "refused\n";
2080: }
2081: } else {
2082: Reply($client, "refused\n", $userinput);
2083:
2084: }
2085: # -------------------------------------------------------------------- rolesdel
2086: } elsif ($userinput =~ /^rolesdel/) {
2087: if(isClient) {
2088: &Debug("rolesdel");
2089: if ($wasenc==1) {
2090: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
2091: =split(/:/,$userinput);
2092: &Debug("cmd = ".$cmd." exedom= ".$exedom.
2093: "user = ".$exeuser." udom=".$udom.
2094: "what = ".$what);
2095: my $namespace='roles';
2096: chomp($what);
2097: my $proname=propath($udom,$uname);
2098: my $now=time;
2099: my @rolekeys=split(/\&/,$what);
2100: my %hash;
2101: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2102: {
2103: my $hfh;
2104: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) {
2105: print $hfh "D:$now:$exedom:$exeuser:$what\n";
2106: }
2107: }
2108: foreach my $key (@rolekeys) {
2109: delete $hash{$key};
2110: }
2111: if (untie(%hash)) {
2112: print $client "ok\n";
2113: } else {
2114: print $client "error: ".($!+0)
2115: ." untie(GDBM) Failed ".
2116: "while attempting rolesdel\n";
2117: }
2118: } else {
2119: print $client "error: ".($!+0)
2120: ." tie(GDBM) Failed ".
2121: "while attempting rolesdel\n";
2122: }
2123: } else {
2124: print $client "refused\n";
2125: }
2126: } else {
2127: Reply($client, "refused\n", $userinput);
2128:
2129: }
2130: # ------------------------------------------------------------------------- get
2131: } elsif ($userinput =~ /^get/) {
2132: if(isClient) {
2133: my ($cmd,$udom,$uname,$namespace,$what)
2134: =split(/:/,$userinput);
2135: $namespace=~s/\//\_/g;
2136: $namespace=~s/\W//g;
2137: chomp($what);
2138: my @queries=split(/\&/,$what);
2139: my $proname=propath($udom,$uname);
2140: my $qresult='';
2141: my %hash;
2142: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2143: for (my $i=0;$i<=$#queries;$i++) {
2144: $qresult.="$hash{$queries[$i]}&";
2145: }
2146: if (untie(%hash)) {
2147: $qresult=~s/\&$//;
2148: print $client "$qresult\n";
2149: } else {
2150: print $client "error: ".($!+0)
2151: ." untie(GDBM) Failed ".
2152: "while attempting get\n";
2153: }
2154: } else {
2155: if ($!+0 == 2) {
2156: print $client "error:No such file or ".
2157: "GDBM reported bad block error\n";
2158: } else {
2159: print $client "error: ".($!+0)
2160: ." tie(GDBM) Failed ".
2161: "while attempting get\n";
2162: }
2163: }
2164: } else {
2165: Reply($client, "refused\n", $userinput);
2166:
2167: }
2168: # ------------------------------------------------------------------------ eget
2169: } elsif ($userinput =~ /^eget/) {
2170: if (isClient) {
2171: my ($cmd,$udom,$uname,$namespace,$what)
2172: =split(/:/,$userinput);
2173: $namespace=~s/\//\_/g;
2174: $namespace=~s/\W//g;
2175: chomp($what);
2176: my @queries=split(/\&/,$what);
2177: my $proname=propath($udom,$uname);
2178: my $qresult='';
2179: my %hash;
2180: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2181: for (my $i=0;$i<=$#queries;$i++) {
2182: $qresult.="$hash{$queries[$i]}&";
2183: }
2184: if (untie(%hash)) {
2185: $qresult=~s/\&$//;
2186: if ($cipher) {
2187: my $cmdlength=length($qresult);
2188: $qresult.=" ";
2189: my $encqresult='';
2190: for
2191: (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
2192: $encqresult.=
2193: unpack("H16",
2194: $cipher->encrypt(substr($qresult,$encidx,8)));
2195: }
2196: print $client "enc:$cmdlength:$encqresult\n";
2197: } else {
2198: print $client "error:no_key\n";
2199: }
2200: } else {
2201: print $client "error: ".($!+0)
2202: ." untie(GDBM) Failed ".
2203: "while attempting eget\n";
2204: }
2205: } else {
2206: print $client "error: ".($!+0)
2207: ." tie(GDBM) Failed ".
2208: "while attempting eget\n";
2209: }
2210: } else {
2211: Reply($client, "refused\n", $userinput);
2212:
2213: }
2214: # ------------------------------------------------------------------------- del
2215: } elsif ($userinput =~ /^del/) {
2216: if(isClient) {
2217: my ($cmd,$udom,$uname,$namespace,$what)
2218: =split(/:/,$userinput);
2219: $namespace=~s/\//\_/g;
2220: $namespace=~s/\W//g;
2221: chomp($what);
2222: my $proname=propath($udom,$uname);
2223: my $now=time;
2224: my @keys=split(/\&/,$what);
2225: my %hash;
2226: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2227: unless ($namespace=~/^nohist\_/) {
2228: my $hfh;
2229: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) { print $hfh "D:$now:$what\n"; }
2230: }
2231: foreach my $key (@keys) {
2232: delete($hash{$key});
2233: }
2234: if (untie(%hash)) {
2235: print $client "ok\n";
2236: } else {
2237: print $client "error: ".($!+0)
2238: ." untie(GDBM) Failed ".
2239: "while attempting del\n";
2240: }
2241: } else {
2242: print $client "error: ".($!+0)
2243: ." tie(GDBM) Failed ".
2244: "while attempting del\n";
2245: }
2246: } else {
2247: Reply($client, "refused\n", $userinput);
2248:
2249: }
2250: # ------------------------------------------------------------------------ keys
2251: } elsif ($userinput =~ /^keys/) {
2252: if(isClient) {
2253: my ($cmd,$udom,$uname,$namespace)
2254: =split(/:/,$userinput);
2255: $namespace=~s/\//\_/g;
2256: $namespace=~s/\W//g;
2257: my $proname=propath($udom,$uname);
2258: my $qresult='';
2259: my %hash;
2260: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2261: foreach my $key (keys %hash) {
2262: $qresult.="$key&";
2263: }
2264: if (untie(%hash)) {
2265: $qresult=~s/\&$//;
2266: print $client "$qresult\n";
2267: } else {
2268: print $client "error: ".($!+0)
2269: ." untie(GDBM) Failed ".
2270: "while attempting keys\n";
2271: }
2272: } else {
2273: print $client "error: ".($!+0)
2274: ." tie(GDBM) Failed ".
2275: "while attempting keys\n";
2276: }
2277: } else {
2278: Reply($client, "refused\n", $userinput);
2279:
2280: }
2281: # ----------------------------------------------------------------- dumpcurrent
2282: } elsif ($userinput =~ /^currentdump/) {
2283: if (isClient) {
2284: my ($cmd,$udom,$uname,$namespace)
2285: =split(/:/,$userinput);
2286: $namespace=~s/\//\_/g;
2287: $namespace=~s/\W//g;
2288: my $qresult='';
2289: my $proname=propath($udom,$uname);
2290: my %hash;
2291: if (tie(%hash,'GDBM_File',
2292: "$proname/$namespace.db",
2293: &GDBM_READER(),0640)) {
2294: # Structure of %data:
2295: # $data{$symb}->{$parameter}=$value;
2296: # $data{$symb}->{'v.'.$parameter}=$version;
2297: # since $parameter will be unescaped, we do not
2298: # have to worry about silly parameter names...
2299: my %data = ();
2300: while (my ($key,$value) = each(%hash)) {
2301: my ($v,$symb,$param) = split(/:/,$key);
2302: next if ($v eq 'version' || $symb eq 'keys');
2303: next if (exists($data{$symb}) &&
2304: exists($data{$symb}->{$param}) &&
2305: $data{$symb}->{'v.'.$param} > $v);
2306: $data{$symb}->{$param}=$value;
2307: $data{$symb}->{'v.'.$param}=$v;
2308: }
2309: if (untie(%hash)) {
2310: while (my ($symb,$param_hash) = each(%data)) {
2311: while(my ($param,$value) = each (%$param_hash)){
2312: next if ($param =~ /^v\./);
2313: $qresult.=$symb.':'.$param.'='.$value.'&';
2314: }
2315: }
2316: chop($qresult);
2317: print $client "$qresult\n";
2318: } else {
2319: print $client "error: ".($!+0)
2320: ." untie(GDBM) Failed ".
2321: "while attempting currentdump\n";
2322: }
2323: } else {
2324: print $client "error: ".($!+0)
2325: ." tie(GDBM) Failed ".
2326: "while attempting currentdump\n";
2327: }
2328: } else {
2329: Reply($client, "refused\n", $userinput);
2330: }
2331: # ------------------------------------------------------------------------ dump
2332: } elsif ($userinput =~ /^dump/) {
2333: if(isClient) {
2334: my ($cmd,$udom,$uname,$namespace,$regexp)
2335: =split(/:/,$userinput);
2336: $namespace=~s/\//\_/g;
2337: $namespace=~s/\W//g;
2338: if (defined($regexp)) {
2339: $regexp=&unescape($regexp);
2340: } else {
2341: $regexp='.';
2342: }
2343: my $qresult='';
2344: my $proname=propath($udom,$uname);
2345: my %hash;
2346: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2347: while (my ($key,$value) = each(%hash)) {
2348: if ($regexp eq '.') {
2349: $qresult.=$key.'='.$value.'&';
2350: } else {
2351: my $unescapeKey = &unescape($key);
2352: if (eval('$unescapeKey=~/$regexp/')) {
2353: $qresult.="$key=$value&";
2354: }
2355: }
2356: }
2357: if (untie(%hash)) {
2358: chop($qresult);
2359: print $client "$qresult\n";
2360: } else {
2361: print $client "error: ".($!+0)
2362: ." untie(GDBM) Failed ".
2363: "while attempting dump\n";
2364: }
2365: } else {
2366: print $client "error: ".($!+0)
2367: ." tie(GDBM) Failed ".
2368: "while attempting dump\n";
2369: }
2370: } else {
2371: Reply($client, "refused\n", $userinput);
2372:
2373: }
2374: # ----------------------------------------------------------------------- store
2375: } elsif ($userinput =~ /^store/) {
2376: if(isClient) {
2377: my ($cmd,$udom,$uname,$namespace,$rid,$what)
2378: =split(/:/,$userinput);
2379: $namespace=~s/\//\_/g;
2380: $namespace=~s/\W//g;
2381: if ($namespace ne 'roles') {
2382: chomp($what);
2383: my $proname=propath($udom,$uname);
2384: my $now=time;
2385: my @pairs=split(/\&/,$what);
2386: my %hash;
2387: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2388: unless ($namespace=~/^nohist\_/) {
2389: my $hfh;
2390: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) {
2391: print $hfh "P:$now:$rid:$what\n";
2392: }
2393: }
2394: my @previouskeys=split(/&/,$hash{"keys:$rid"});
2395: my $key;
2396: $hash{"version:$rid"}++;
2397: my $version=$hash{"version:$rid"};
2398: my $allkeys='';
2399: foreach my $pair (@pairs) {
2400: my ($key,$value)=split(/=/,$pair);
2401: $allkeys.=$key.':';
2402: $hash{"$version:$rid:$key"}=$value;
2403: }
2404: $hash{"$version:$rid:timestamp"}=$now;
2405: $allkeys.='timestamp';
2406: $hash{"$version:keys:$rid"}=$allkeys;
2407: if (untie(%hash)) {
2408: print $client "ok\n";
2409: } else {
2410: print $client "error: ".($!+0)
2411: ." untie(GDBM) Failed ".
2412: "while attempting store\n";
2413: }
2414: } else {
2415: print $client "error: ".($!+0)
2416: ." tie(GDBM) Failed ".
2417: "while attempting store\n";
2418: }
2419: } else {
2420: print $client "refused\n";
2421: }
2422: } else {
2423: Reply($client, "refused\n", $userinput);
2424:
2425: }
2426: # --------------------------------------------------------------------- restore
2427: } elsif ($userinput =~ /^restore/) {
2428: if(isClient) {
2429: my ($cmd,$udom,$uname,$namespace,$rid)
2430: =split(/:/,$userinput);
2431: $namespace=~s/\//\_/g;
2432: $namespace=~s/\W//g;
2433: chomp($rid);
2434: my $proname=propath($udom,$uname);
2435: my $qresult='';
2436: my %hash;
2437: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2438: my $version=$hash{"version:$rid"};
2439: $qresult.="version=$version&";
2440: my $scope;
2441: for ($scope=1;$scope<=$version;$scope++) {
2442: my $vkeys=$hash{"$scope:keys:$rid"};
2443: my @keys=split(/:/,$vkeys);
2444: my $key;
2445: $qresult.="$scope:keys=$vkeys&";
2446: foreach $key (@keys) {
2447: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
2448: }
2449: }
2450: if (untie(%hash)) {
2451: $qresult=~s/\&$//;
2452: print $client "$qresult\n";
2453: } else {
2454: print $client "error: ".($!+0)
2455: ." untie(GDBM) Failed ".
2456: "while attempting restore\n";
2457: }
2458: } else {
2459: print $client "error: ".($!+0)
2460: ." tie(GDBM) Failed ".
2461: "while attempting restore\n";
2462: }
2463: } else {
2464: Reply($client, "refused\n", $userinput);
2465:
2466: }
2467: # -------------------------------------------------------------------- chatsend
2468: } elsif ($userinput =~ /^chatsend/) {
2469: if(isClient) {
2470: my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
2471: &chatadd($cdom,$cnum,$newpost);
2472: print $client "ok\n";
2473: } else {
2474: Reply($client, "refused\n", $userinput);
2475:
2476: }
2477: # -------------------------------------------------------------------- chatretr
2478: } elsif ($userinput =~ /^chatretr/) {
2479: if(isClient) {
2480: my
2481: ($cmd,$cdom,$cnum,$udom,$uname)=split(/\:/,$userinput);
2482: my $reply='';
2483: foreach (&getchat($cdom,$cnum,$udom,$uname)) {
2484: $reply.=&escape($_).':';
2485: }
2486: $reply=~s/\:$//;
2487: print $client $reply."\n";
2488: } else {
2489: Reply($client, "refused\n", $userinput);
2490:
2491: }
2492: # ------------------------------------------------------------------- querysend
2493: } elsif ($userinput =~ /^querysend/) {
2494: if (isClient) {
2495: my ($cmd,$query,
2496: $arg1,$arg2,$arg3)=split(/\:/,$userinput);
2497: $query=~s/\n*$//g;
2498: print $client "".
2499: sqlreply("$clientname\&$query".
2500: "\&$arg1"."\&$arg2"."\&$arg3")."\n";
2501: } else {
2502: Reply($client, "refused\n", $userinput);
2503:
2504: }
2505: # ------------------------------------------------------------------ queryreply
2506: } elsif ($userinput =~ /^queryreply/) {
2507: if(isClient) {
2508: my ($cmd,$id,$reply)=split(/:/,$userinput);
2509: my $store;
2510: my $execdir=$perlvar{'lonDaemons'};
2511: if ($store=IO::File->new(">$execdir/tmp/$id")) {
2512: $reply=~s/\&/\n/g;
2513: print $store $reply;
2514: close $store;
2515: my $store2=IO::File->new(">$execdir/tmp/$id.end");
2516: print $store2 "done\n";
2517: close $store2;
2518: print $client "ok\n";
2519: }
2520: else {
2521: print $client "error: ".($!+0)
2522: ." IO::File->new Failed ".
2523: "while attempting queryreply\n";
2524: }
2525: } else {
2526: Reply($client, "refused\n", $userinput);
2527:
2528: }
2529: # ----------------------------------------------------------------- courseidput
2530: } elsif ($userinput =~ /^courseidput/) {
2531: if(isClient) {
2532: my ($cmd,$udom,$what)=split(/:/,$userinput);
2533: chomp($what);
2534: $udom=~s/\W//g;
2535: my $proname=
2536: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
2537: my $now=time;
2538: my @pairs=split(/\&/,$what);
2539: my %hash;
2540: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
2541: foreach my $pair (@pairs) {
2542: my ($key,$descr,$inst_code)=split(/=/,$pair);
2543: $hash{$key}=$descr.':'.$inst_code.':'.$now;
2544: }
2545: if (untie(%hash)) {
2546: print $client "ok\n";
2547: } else {
2548: print $client "error: ".($!+0)
2549: ." untie(GDBM) Failed ".
2550: "while attempting courseidput\n";
2551: }
2552: } else {
2553: print $client "error: ".($!+0)
2554: ." tie(GDBM) Failed ".
2555: "while attempting courseidput\n";
2556: }
2557: } else {
2558: Reply($client, "refused\n", $userinput);
2559:
2560: }
2561: # ---------------------------------------------------------------- courseiddump
2562: } elsif ($userinput =~ /^courseiddump/) {
2563: if(isClient) {
2564: my ($cmd,$udom,$since,$description)
2565: =split(/:/,$userinput);
2566: if (defined($description)) {
2567: $description=&unescape($description);
2568: } else {
2569: $description='.';
2570: }
2571: unless (defined($since)) { $since=0; }
2572: my $qresult='';
2573: my $proname=
2574: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
2575: my %hash;
2576: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
2577: while (my ($key,$value) = each(%hash)) {
2578: my ($descr,$lasttime,$inst_code);
2579: if ($value =~ m/^([^\:]*):([^\:]*):(\d+)$/) {
2580: ($descr,$inst_code,$lasttime)=($1,$2,$3);
2581: } else {
2582: ($descr,$lasttime) = split(/\:/,$value);
2583: }
2584: if ($lasttime<$since) { next; }
2585: if ($description eq '.') {
2586: $qresult.=$key.'='.$descr.':'.$inst_code.'&';
2587: } else {
2588: my $unescapeVal = &unescape($descr);
2589: if (eval('$unescapeVal=~/\Q$description\E/i')) {
2590: $qresult.=$key.'='.$descr.':'.$inst_code.'&';
2591: }
2592: }
2593: }
2594: if (untie(%hash)) {
2595: chop($qresult);
2596: print $client "$qresult\n";
2597: } else {
2598: print $client "error: ".($!+0)
2599: ." untie(GDBM) Failed ".
2600: "while attempting courseiddump\n";
2601: }
2602: } else {
2603: print $client "error: ".($!+0)
2604: ." tie(GDBM) Failed ".
2605: "while attempting courseiddump\n";
2606: }
2607: } else {
2608: Reply($client, "refused\n", $userinput);
2609:
2610: }
2611: # ----------------------------------------------------------------------- idput
2612: } elsif ($userinput =~ /^idput/) {
2613: if(isClient) {
2614: my ($cmd,$udom,$what)=split(/:/,$userinput);
2615: chomp($what);
2616: $udom=~s/\W//g;
2617: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
2618: my $now=time;
2619: my @pairs=split(/\&/,$what);
2620: my %hash;
2621: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
2622: {
2623: my $hfh;
2624: if ($hfh=IO::File->new(">>$proname.hist")) {
2625: print $hfh "P:$now:$what\n";
2626: }
2627: }
2628: foreach my $pair (@pairs) {
2629: my ($key,$value)=split(/=/,$pair);
2630: $hash{$key}=$value;
2631: }
2632: if (untie(%hash)) {
2633: print $client "ok\n";
2634: } else {
2635: print $client "error: ".($!+0)
2636: ." untie(GDBM) Failed ".
2637: "while attempting idput\n";
2638: }
2639: } else {
2640: print $client "error: ".($!+0)
2641: ." tie(GDBM) Failed ".
2642: "while attempting idput\n";
2643: }
2644: } else {
2645: Reply($client, "refused\n", $userinput);
2646:
2647: }
2648: # ----------------------------------------------------------------------- idget
2649: } elsif ($userinput =~ /^idget/) {
2650: if(isClient) {
2651: my ($cmd,$udom,$what)=split(/:/,$userinput);
2652: chomp($what);
2653: $udom=~s/\W//g;
2654: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
2655: my @queries=split(/\&/,$what);
2656: my $qresult='';
2657: my %hash;
2658: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
2659: for (my $i=0;$i<=$#queries;$i++) {
2660: $qresult.="$hash{$queries[$i]}&";
2661: }
2662: if (untie(%hash)) {
2663: $qresult=~s/\&$//;
2664: print $client "$qresult\n";
2665: } else {
2666: print $client "error: ".($!+0)
2667: ." untie(GDBM) Failed ".
2668: "while attempting idget\n";
2669: }
2670: } else {
2671: print $client "error: ".($!+0)
2672: ." tie(GDBM) Failed ".
2673: "while attempting idget\n";
2674: }
2675: } else {
2676: Reply($client, "refused\n", $userinput);
2677:
2678: }
2679: # ---------------------------------------------------------------------- tmpput
2680: } elsif ($userinput =~ /^tmpput/) {
2681: if(isClient) {
2682: my ($cmd,$what)=split(/:/,$userinput);
2683: my $store;
2684: $tmpsnum++;
2685: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
2686: $id=~s/\W/\_/g;
2687: $what=~s/\n//g;
2688: my $execdir=$perlvar{'lonDaemons'};
2689: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
2690: print $store $what;
2691: close $store;
2692: print $client "$id\n";
2693: }
2694: else {
2695: print $client "error: ".($!+0)
2696: ."IO::File->new Failed ".
2697: "while attempting tmpput\n";
2698: }
2699: } else {
2700: Reply($client, "refused\n", $userinput);
2701:
2702: }
2703:
2704: # ---------------------------------------------------------------------- tmpget
2705: } elsif ($userinput =~ /^tmpget/) {
2706: if(isClient) {
2707: my ($cmd,$id)=split(/:/,$userinput);
2708: chomp($id);
2709: $id=~s/\W/\_/g;
2710: my $store;
2711: my $execdir=$perlvar{'lonDaemons'};
2712: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
2713: my $reply=<$store>;
2714: print $client "$reply\n";
2715: close $store;
2716: }
2717: else {
2718: print $client "error: ".($!+0)
2719: ."IO::File->new Failed ".
2720: "while attempting tmpget\n";
2721: }
2722: } else {
2723: Reply($client, "refused\n", $userinput);
2724:
2725: }
2726: # ---------------------------------------------------------------------- tmpdel
2727: } elsif ($userinput =~ /^tmpdel/) {
2728: if(isClient) {
2729: my ($cmd,$id)=split(/:/,$userinput);
2730: chomp($id);
2731: $id=~s/\W/\_/g;
2732: my $execdir=$perlvar{'lonDaemons'};
2733: if (unlink("$execdir/tmp/$id.tmp")) {
2734: print $client "ok\n";
2735: } else {
2736: print $client "error: ".($!+0)
2737: ."Unlink tmp Failed ".
2738: "while attempting tmpdel\n";
2739: }
2740: } else {
2741: Reply($client, "refused\n", $userinput);
2742:
2743: }
2744: # ----------------------------------------- portfolio directory list (portls)
2745: } elsif ($userinput =~ /^portls/) {
2746: if(isClient) {
2747: my ($cmd,$uname,$udom)=split(/:/,$userinput);
2748: my $udir=propath($udom,$uname).'/userfiles/portfolio';
2749: my $dirLine='';
2750: my $dirContents='';
2751: if (opendir(LSDIR,$udir.'/')){
2752: while ($dirLine = readdir(LSDIR)){
2753: $dirContents = $dirContents.$dirLine.'<br />';
2754: }
2755: } else {
2756: $dirContents = "No directory found\n";
2757: }
2758: print $client $dirContents."\n";
2759: } else {
2760: Reply($client, "refused\n", $userinput);
2761: }
2762: # -------------------------------------------------------------------------- ls
2763: } elsif ($userinput =~ /^ls/) {
2764: if(isClient) {
2765: my $obs;
2766: my $rights;
2767: my ($cmd,$ulsdir)=split(/:/,$userinput);
2768: my $ulsout='';
2769: my $ulsfn;
2770: if (-e $ulsdir) {
2771: if(-d $ulsdir) {
2772: if (opendir(LSDIR,$ulsdir)) {
2773: while ($ulsfn=readdir(LSDIR)) {
2774: undef $obs, $rights;
2775: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
2776: #We do some obsolete checking here
2777: if(-e $ulsdir.'/'.$ulsfn.".meta") {
2778: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
2779: my @obsolete=<FILE>;
2780: foreach my $obsolete (@obsolete) {
2781: if($obsolete =~ m|(<obsolete>)(on)|) { $obs = 1; }
2782: if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
2783: }
2784: }
2785: $ulsout.=$ulsfn.'&'.join('&',@ulsstats);
2786: if($obs eq '1') { $ulsout.="&1"; }
2787: else { $ulsout.="&0"; }
2788: if($rights eq '1') { $ulsout.="&1:"; }
2789: else { $ulsout.="&0:"; }
2790: }
2791: closedir(LSDIR);
2792: }
2793: } else {
2794: my @ulsstats=stat($ulsdir);
2795: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
2796: }
2797: } else {
2798: $ulsout='no_such_dir';
2799: }
2800: if ($ulsout eq '') { $ulsout='empty'; }
2801: print $client "$ulsout\n";
2802: } else {
2803: Reply($client, "refused\n", $userinput);
2804:
2805: }
2806: # ----------------------------------------------------------------- setannounce
2807: } elsif ($userinput =~ /^setannounce/) {
2808: if (isClient) {
2809: my ($cmd,$announcement)=split(/:/,$userinput);
2810: chomp($announcement);
2811: $announcement=&unescape($announcement);
2812: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
2813: '/announcement.txt')) {
2814: print $store $announcement;
2815: close $store;
2816: print $client "ok\n";
2817: } else {
2818: print $client "error: ".($!+0)."\n";
2819: }
2820: } else {
2821: Reply($client, "refused\n", $userinput);
2822:
2823: }
2824: # ------------------------------------------------------------------ Hanging up
2825: } elsif (($userinput =~ /^exit/) ||
2826: ($userinput =~ /^init/)) { # no restrictions.
2827: &logthis(
2828: "Client $clientip ($clientname) hanging up: $userinput");
2829: print $client "bye\n";
2830: $client->shutdown(2); # shutdown the socket forcibly.
2831: $client->close();
2832: return 0;
2833:
2834: # ---------------------------------- set current host/domain
2835: } elsif ($userinput =~ /^sethost:/) {
2836: if (isClient) {
2837: print $client &sethost($userinput)."\n";
2838: } else {
2839: print $client "refused\n";
2840: }
2841: #---------------------------------- request file (?) version.
2842: } elsif ($userinput =~/^version:/) {
2843: if (isClient) {
2844: print $client &version($userinput)."\n";
2845: } else {
2846: print $client "refused\n";
2847: }
2848: #------------------------------- is auto-enrollment enabled?
2849: } elsif ($userinput =~/^autorun:/) {
2850: if (isClient) {
2851: my ($cmd,$cdom) = split(/:/,$userinput);
2852: my $outcome = &localenroll::run($cdom);
2853: print $client "$outcome\n";
2854: } else {
2855: print $client "0\n";
2856: }
2857: #------------------------------- get official sections (for auto-enrollment).
2858: } elsif ($userinput =~/^autogetsections:/) {
2859: if (isClient) {
2860: my ($cmd,$coursecode,$cdom)=split(/:/,$userinput);
2861: my @secs = &localenroll::get_sections($coursecode,$cdom);
2862: my $seclist = &escape(join(':',@secs));
2863: print $client "$seclist\n";
2864: } else {
2865: print $client "refused\n";
2866: }
2867: #----------------------- validate owner of new course section (for auto-enrollment).
2868: } elsif ($userinput =~/^autonewcourse:/) {
2869: if (isClient) {
2870: my ($cmd,$inst_course_id,$owner,$cdom)=split(/:/,$userinput);
2871: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom);
2872: print $client "$outcome\n";
2873: } else {
2874: print $client "refused\n";
2875: }
2876: #-------------- validate course section in schedule of classes (for auto-enrollment).
2877: } elsif ($userinput =~/^autovalidatecourse:/) {
2878: if (isClient) {
2879: my ($cmd,$inst_course_id,$cdom)=split(/:/,$userinput);
2880: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
2881: print $client "$outcome\n";
2882: } else {
2883: print $client "refused\n";
2884: }
2885: #--------------------------- create password for new user (for auto-enrollment).
2886: } elsif ($userinput =~/^autocreatepassword:/) {
2887: if (isClient) {
2888: my ($cmd,$authparam,$cdom)=split(/:/,$userinput);
2889: my ($create_passwd,$authchk);
2890: ($authparam,$create_passwd,$authchk) = &localenroll::create_password($authparam,$cdom);
2891: print $client &escape($authparam.':'.$create_passwd.':'.$authchk)."\n";
2892: } else {
2893: print $client "refused\n";
2894: }
2895: #--------------------------- read and remove temporary files (for auto-enrollment).
2896: } elsif ($userinput =~/^autoretrieve:/) {
2897: if (isClient) {
2898: my ($cmd,$filename) = split(/:/,$userinput);
2899: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
2900: if ( (-e $source) && ($filename ne '') ) {
2901: my $reply = '';
2902: if (open(my $fh,$source)) {
2903: while (<$fh>) {
2904: chomp($_);
2905: $_ =~ s/^\s+//g;
2906: $_ =~ s/\s+$//g;
2907: $reply .= $_;
2908: }
2909: close($fh);
2910: print $client &escape($reply)."\n";
2911: # unlink($source);
2912: } else {
2913: print $client "error\n";
2914: }
2915: } else {
2916: print $client "error\n";
2917: }
2918: } else {
2919: print $client "refused\n";
2920: }
2921: #--------------------- read and retrieve institutional code format (for support form).
2922: } elsif ($userinput =~/^autoinstcodeformat:/) {
2923: if (isClient) {
2924: my $reply;
2925: my($cmd,$cdom,$course) = split(/:/,$userinput);
2926: my @pairs = split/\&/,$course;
2927: my %instcodes = ();
2928: my %codes = ();
2929: my @codetitles = ();
2930: my %cat_titles = ();
2931: my %cat_order = ();
2932: foreach (@pairs) {
2933: my ($key,$value) = split/=/,$_;
2934: $instcodes{&unescape($key)} = &unescape($value);
2935: }
2936: my $formatreply = &localenroll::instcode_format($cdom,\%instcodes,\%codes,\@codetitles,\%cat_titles,\%cat_order);
2937: if ($formatreply eq 'ok') {
2938: my $codes_str = &hash2str(%codes);
2939: my $codetitles_str = &array2str(@codetitles);
2940: my $cat_titles_str = &hash2str(%cat_titles);
2941: my $cat_order_str = &hash2str(%cat_order);
2942: print $client $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'.$cat_order_str."\n";
2943: }
2944: } else {
2945: print $client "refused\n";
2946: }
2947: # ------------------------------------------------------------- unknown command
2948:
2949: } else {
2950: # unknown command
2951: print $client "unknown_cmd\n";
2952: }
2953: # -------------------------------------------------------------------- complete
2954: Debug("process_request - returning 1");
2955: return 1;
2956: }
2957: #
2958: # Decipher encoded traffic
2959: # Parameters:
2960: # input - Encoded data.
2961: # Returns:
2962: # Decoded data or undef if encryption key was not yet negotiated.
2963: # Implicit input:
2964: # cipher - This global holds the negotiated encryption key.
2965: #
2966: sub decipher {
2967: my ($input) = @_;
2968: my $output = '';
2969:
2970:
2971: if($cipher) {
2972: my($enc, $enclength, $encinput) = split(/:/, $input);
2973: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
2974: $output .=
2975: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
2976: }
2977: return substr($output, 0, $enclength);
2978: } else {
2979: return undef;
2980: }
2981: }
2982:
2983: #
2984: # Register a command processor. This function is invoked to register a sub
2985: # to process a request. Once registered, the ProcessRequest sub can automatically
2986: # dispatch requests to an appropriate sub, and do the top level validity checking
2987: # as well:
2988: # - Is the keyword recognized.
2989: # - Is the proper client type attempting the request.
2990: # - Is the request encrypted if it has to be.
2991: # Parameters:
2992: # $request_name - Name of the request being registered.
2993: # This is the command request that will match
2994: # against the hash keywords to lookup the information
2995: # associated with the dispatch information.
2996: # $procedure - Reference to a sub to call to process the request.
2997: # All subs get called as follows:
2998: # Procedure($cmd, $tail, $replyfd, $key)
2999: # $cmd - the actual keyword that invoked us.
3000: # $tail - the tail of the request that invoked us.
3001: # $replyfd- File descriptor connected to the client
3002: # $must_encode - True if the request must be encoded to be good.
3003: # $client_ok - True if it's ok for a client to request this.
3004: # $manager_ok - True if it's ok for a manager to request this.
3005: # Side effects:
3006: # - On success, the Dispatcher hash has an entry added for the key $RequestName
3007: # - On failure, the program will die as it's a bad internal bug to try to
3008: # register a duplicate command handler.
3009: #
3010: sub register_handler {
3011: my ($request_name,$procedure,$must_encode, $client_ok,$manager_ok) = @_;
3012:
3013: # Don't allow duplication#
3014:
3015: if (defined $Dispatcher{$request_name}) {
3016: die "Attempting to define a duplicate request handler for $request_name\n";
3017: }
3018: # Build the client type mask:
3019:
3020: my $client_type_mask = 0;
3021: if($client_ok) {
3022: $client_type_mask |= $CLIENT_OK;
3023: }
3024: if($manager_ok) {
3025: $client_type_mask |= $MANAGER_OK;
3026: }
3027:
3028: # Enter the hash:
3029:
3030: my @entry = ($procedure, $must_encode, $client_type_mask);
3031:
3032: $Dispatcher{$request_name} = \@entry;
3033:
3034:
3035: }
3036:
3037:
3038: #------------------------------------------------------------------
3039:
3040:
3041:
3042:
3043: #
3044: # Convert an error return code from lcpasswd to a string value.
3045: #
3046: sub lcpasswdstrerror {
3047: my $ErrorCode = shift;
3048: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
3049: return "lcpasswd Unrecognized error return value ".$ErrorCode;
3050: } else {
3051: return $passwderrors[$ErrorCode];
3052: }
3053: }
3054:
3055: #
3056: # Convert an error return code from lcuseradd to a string value:
3057: #
3058: sub lcuseraddstrerror {
3059: my $ErrorCode = shift;
3060: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
3061: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
3062: } else {
3063: return $adderrors[$ErrorCode];
3064: }
3065: }
3066:
3067: # grabs exception and records it to log before exiting
3068: sub catchexception {
3069: my ($error)=@_;
3070: $SIG{'QUIT'}='DEFAULT';
3071: $SIG{__DIE__}='DEFAULT';
3072: &status("Catching exception");
3073: &logthis("<font color='red'>CRITICAL: "
3074: ."ABNORMAL EXIT. Child $$ for server $thisserver died through "
3075: ."a crash with this error msg->[$error]</font>");
3076: &logthis('Famous last words: '.$status.' - '.$lastlog);
3077: if ($client) { print $client "error: $error\n"; }
3078: $server->close();
3079: die($error);
3080: }
3081:
3082: sub timeout {
3083: &status("Handling Timeout");
3084: &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
3085: &catchexception('Timeout');
3086: }
3087: # -------------------------------- Set signal handlers to record abnormal exits
3088:
3089: $SIG{'QUIT'}=\&catchexception;
3090: $SIG{__DIE__}=\&catchexception;
3091:
3092: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
3093: &status("Read loncapa.conf and loncapa_apache.conf");
3094: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
3095: %perlvar=%{$perlvarref};
3096: undef $perlvarref;
3097:
3098: # ----------------------------- Make sure this process is running from user=www
3099: my $wwwid=getpwnam('www');
3100: if ($wwwid!=$<) {
3101: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
3102: my $subj="LON: $currenthostid User ID mismatch";
3103: system("echo 'User ID mismatch. lond must be run as user www.' |\
3104: mailto $emailto -s '$subj' > /dev/null");
3105: exit 1;
3106: }
3107:
3108: # --------------------------------------------- Check if other instance running
3109:
3110: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
3111:
3112: if (-e $pidfile) {
3113: my $lfh=IO::File->new("$pidfile");
3114: my $pide=<$lfh>;
3115: chomp($pide);
3116: if (kill 0 => $pide) { die "already running"; }
3117: }
3118:
3119: # ------------------------------------------------------------- Read hosts file
3120:
3121:
3122:
3123: # establish SERVER socket, bind and listen.
3124: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
3125: Type => SOCK_STREAM,
3126: Proto => 'tcp',
3127: Reuse => 1,
3128: Listen => 10 )
3129: or die "making socket: $@\n";
3130:
3131: # --------------------------------------------------------- Do global variables
3132:
3133: # global variables
3134:
3135: my %children = (); # keys are current child process IDs
3136:
3137: sub REAPER { # takes care of dead children
3138: $SIG{CHLD} = \&REAPER;
3139: &status("Handling child death");
3140: my $pid;
3141: do {
3142: $pid = waitpid(-1,&WNOHANG());
3143: if (defined($children{$pid})) {
3144: &logthis("Child $pid died");
3145: delete($children{$pid});
3146: } elsif ($pid > 0) {
3147: &logthis("Unknown Child $pid died");
3148: }
3149: } while ( $pid > 0 );
3150: foreach my $child (keys(%children)) {
3151: $pid = waitpid($child,&WNOHANG());
3152: if ($pid > 0) {
3153: &logthis("Child $child - $pid looks like we missed it's death");
3154: delete($children{$pid});
3155: }
3156: }
3157: &status("Finished Handling child death");
3158: }
3159:
3160: sub HUNTSMAN { # signal handler for SIGINT
3161: &status("Killing children (INT)");
3162: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
3163: kill 'INT' => keys %children;
3164: &logthis("Free socket: ".shutdown($server,2)); # free up socket
3165: my $execdir=$perlvar{'lonDaemons'};
3166: unlink("$execdir/logs/lond.pid");
3167: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
3168: &status("Done killing children");
3169: exit; # clean up with dignity
3170: }
3171:
3172: sub HUPSMAN { # signal handler for SIGHUP
3173: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
3174: &status("Killing children for restart (HUP)");
3175: kill 'INT' => keys %children;
3176: &logthis("Free socket: ".shutdown($server,2)); # free up socket
3177: &logthis("<font color='red'>CRITICAL: Restarting</font>");
3178: my $execdir=$perlvar{'lonDaemons'};
3179: unlink("$execdir/logs/lond.pid");
3180: &status("Restarting self (HUP)");
3181: exec("$execdir/lond"); # here we go again
3182: }
3183:
3184: #
3185: # Kill off hashes that describe the host table prior to re-reading it.
3186: # Hashes affected are:
3187: # %hostid, %hostdom %hostip %hostdns.
3188: #
3189: sub KillHostHashes {
3190: foreach my $key (keys %hostid) {
3191: delete $hostid{$key};
3192: }
3193: foreach my $key (keys %hostdom) {
3194: delete $hostdom{$key};
3195: }
3196: foreach my $key (keys %hostip) {
3197: delete $hostip{$key};
3198: }
3199: foreach my $key (keys %hostdns) {
3200: delete $hostdns{$key};
3201: }
3202: }
3203: #
3204: # Read in the host table from file and distribute it into the various hashes:
3205: #
3206: # - %hostid - Indexed by IP, the loncapa hostname.
3207: # - %hostdom - Indexed by loncapa hostname, the domain.
3208: # - %hostip - Indexed by hostid, the Ip address of the host.
3209: sub ReadHostTable {
3210:
3211: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
3212: my $myloncapaname = $perlvar{'lonHostID'};
3213: Debug("My loncapa name is : $myloncapaname");
3214: while (my $configline=<CONFIG>) {
3215: if (!($configline =~ /^\s*\#/)) {
3216: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
3217: chomp($ip); $ip=~s/\D+$//;
3218: $hostid{$ip}=$id; # LonCAPA name of host by IP.
3219: $hostdom{$id}=$domain; # LonCAPA domain name of host.
3220: $hostip{$id}=$ip; # IP address of host.
3221: $hostdns{$name} = $id; # LonCAPA name of host by DNS.
3222:
3223: if ($id eq $perlvar{'lonHostID'}) {
3224: Debug("Found me in the host table: $name");
3225: $thisserver=$name;
3226: }
3227: }
3228: }
3229: close(CONFIG);
3230: }
3231: #
3232: # Reload the Apache daemon's state.
3233: # This is done by invoking /home/httpd/perl/apachereload
3234: # a setuid perl script that can be root for us to do this job.
3235: #
3236: sub ReloadApache {
3237: my $execdir = $perlvar{'lonDaemons'};
3238: my $script = $execdir."/apachereload";
3239: system($script);
3240: }
3241:
3242: #
3243: # Called in response to a USR2 signal.
3244: # - Reread hosts.tab
3245: # - All children connected to hosts that were removed from hosts.tab
3246: # are killed via SIGINT
3247: # - All children connected to previously existing hosts are sent SIGUSR1
3248: # - Our internal hosts hash is updated to reflect the new contents of
3249: # hosts.tab causing connections from hosts added to hosts.tab to
3250: # now be honored.
3251: #
3252: sub UpdateHosts {
3253: &status("Reload hosts.tab");
3254: logthis('<font color="blue"> Updating connections </font>');
3255: #
3256: # The %children hash has the set of IP's we currently have children
3257: # on. These need to be matched against records in the hosts.tab
3258: # Any ip's no longer in the table get killed off they correspond to
3259: # either dropped or changed hosts. Note that the re-read of the table
3260: # will take care of new and changed hosts as connections come into being.
3261:
3262:
3263: KillHostHashes;
3264: ReadHostTable;
3265:
3266: foreach my $child (keys %children) {
3267: my $childip = $children{$child};
3268: if(!$hostid{$childip}) {
3269: logthis('<font color="blue"> UpdateHosts killing child '
3270: ." $child for ip $childip </font>");
3271: kill('INT', $child);
3272: } else {
3273: logthis('<font color="green"> keeping child for ip '
3274: ." $childip (pid=$child) </font>");
3275: }
3276: }
3277: ReloadApache;
3278: &status("Finished reloading hosts.tab");
3279: }
3280:
3281:
3282: sub checkchildren {
3283: &status("Checking on the children (sending signals)");
3284: &initnewstatus();
3285: &logstatus();
3286: &logthis('Going to check on the children');
3287: my $docdir=$perlvar{'lonDocRoot'};
3288: foreach (sort keys %children) {
3289: sleep 1;
3290: unless (kill 'USR1' => $_) {
3291: &logthis ('Child '.$_.' is dead');
3292: &logstatus($$.' is dead');
3293: }
3294: }
3295: sleep 5;
3296: $SIG{ALRM} = sub { Debug("timeout");
3297: die "timeout"; };
3298: $SIG{__DIE__} = 'DEFAULT';
3299: &status("Checking on the children (waiting for reports)");
3300: foreach (sort keys %children) {
3301: unless (-e "$docdir/lon-status/londchld/$_.txt") {
3302: eval {
3303: alarm(300);
3304: &logthis('Child '.$_.' did not respond');
3305: kill 9 => $_;
3306: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
3307: #$subj="LON: $currenthostid killed lond process $_";
3308: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
3309: #$execdir=$perlvar{'lonDaemons'};
3310: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
3311: alarm(0);
3312: }
3313: }
3314: }
3315: $SIG{ALRM} = 'DEFAULT';
3316: $SIG{__DIE__} = \&catchexception;
3317: &status("Finished checking children");
3318: }
3319:
3320: # --------------------------------------------------------------------- Logging
3321:
3322: sub logthis {
3323: my $message=shift;
3324: my $execdir=$perlvar{'lonDaemons'};
3325: my $fh=IO::File->new(">>$execdir/logs/lond.log");
3326: my $now=time;
3327: my $local=localtime($now);
3328: $lastlog=$local.': '.$message;
3329: print $fh "$local ($$): $message\n";
3330: }
3331:
3332: # ------------------------- Conditional log if $DEBUG true.
3333: sub Debug {
3334: my $message = shift;
3335: if($DEBUG) {
3336: &logthis($message);
3337: }
3338: }
3339:
3340: #
3341: # Sub to do replies to client.. this gives a hook for some
3342: # debug tracing too:
3343: # Parameters:
3344: # fd - File open on client.
3345: # reply - Text to send to client.
3346: # request - Original request from client.
3347: #
3348: sub Reply {
3349: my ($fd, $reply, $request) = @_;
3350: print $fd $reply;
3351: Debug("Request was $request Reply was $reply");
3352:
3353: $Transactions++;
3354:
3355:
3356: }
3357:
3358:
3359: #
3360: # Sub to report a failure.
3361: # This function:
3362: # - Increments the failure statistic counters.
3363: # - Invokes Reply to send the error message to the client.
3364: # Parameters:
3365: # fd - File descriptor open on the client
3366: # reply - Reply text to emit.
3367: # request - The original request message (used by Reply
3368: # to debug if that's enabled.
3369: # Implicit outputs:
3370: # $Failures- The number of failures is incremented.
3371: # Reply (invoked here) sends a message to the
3372: # client:
3373: #
3374: sub Failure {
3375: my $fd = shift;
3376: my $reply = shift;
3377: my $request = shift;
3378:
3379: $Failures++;
3380: Reply($fd, $reply, $request); # That's simple eh?
3381: }
3382: # ------------------------------------------------------------------ Log status
3383:
3384: sub logstatus {
3385: &status("Doing logging");
3386: my $docdir=$perlvar{'lonDocRoot'};
3387: {
3388: my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");
3389: print $fh $$."\t".$clientname."\t".$currenthostid."\t"
3390: .$status."\t".$lastlog."\t $keymode\n";
3391: $fh->close();
3392: }
3393: &status("Finished londstatus.txt");
3394: {
3395: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
3396: print $fh $status."\n".$lastlog."\n".time."\n$keymode";
3397: $fh->close();
3398: }
3399: &status("Finished logging");
3400: }
3401:
3402: sub initnewstatus {
3403: my $docdir=$perlvar{'lonDocRoot'};
3404: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
3405: my $now=time;
3406: my $local=localtime($now);
3407: print $fh "LOND status $local - parent $$\n\n";
3408: opendir(DIR,"$docdir/lon-status/londchld");
3409: while (my $filename=readdir(DIR)) {
3410: unlink("$docdir/lon-status/londchld/$filename");
3411: }
3412: closedir(DIR);
3413: }
3414:
3415: # -------------------------------------------------------------- Status setting
3416:
3417: sub status {
3418: my $what=shift;
3419: my $now=time;
3420: my $local=localtime($now);
3421: $status=$local.': '.$what;
3422: $0='lond: '.$what.' '.$local;
3423: }
3424:
3425: # -------------------------------------------------------- Escape Special Chars
3426:
3427: sub escape {
3428: my $str=shift;
3429: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
3430: return $str;
3431: }
3432:
3433: # ----------------------------------------------------- Un-Escape Special Chars
3434:
3435: sub unescape {
3436: my $str=shift;
3437: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
3438: return $str;
3439: }
3440:
3441: # ----------------------------------------------------------- Send USR1 to lonc
3442:
3443: sub reconlonc {
3444: my $peerfile=shift;
3445: &logthis("Trying to reconnect for $peerfile");
3446: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
3447: if (my $fh=IO::File->new("$loncfile")) {
3448: my $loncpid=<$fh>;
3449: chomp($loncpid);
3450: if (kill 0 => $loncpid) {
3451: &logthis("lonc at pid $loncpid responding, sending USR1");
3452: kill USR1 => $loncpid;
3453: } else {
3454: &logthis(
3455: "<font color='red'>CRITICAL: "
3456: ."lonc at pid $loncpid not responding, giving up</font>");
3457: }
3458: } else {
3459: &logthis('<font color="red">CRITICAL: lonc not running, giving up</font>');
3460: }
3461: }
3462:
3463: # -------------------------------------------------- Non-critical communication
3464:
3465: sub subreply {
3466: my ($cmd,$server)=@_;
3467: my $peerfile="$perlvar{'lonSockDir'}/$server";
3468: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
3469: Type => SOCK_STREAM,
3470: Timeout => 10)
3471: or return "con_lost";
3472: print $sclient "$cmd\n";
3473: my $answer=<$sclient>;
3474: chomp($answer);
3475: if (!$answer) { $answer="con_lost"; }
3476: return $answer;
3477: }
3478:
3479: sub reply {
3480: my ($cmd,$server)=@_;
3481: my $answer;
3482: if ($server ne $currenthostid) {
3483: $answer=subreply($cmd,$server);
3484: if ($answer eq 'con_lost') {
3485: $answer=subreply("ping",$server);
3486: if ($answer ne $server) {
3487: &logthis("sub reply: answer != server answer is $answer, server is $server");
3488: &reconlonc("$perlvar{'lonSockDir'}/$server");
3489: }
3490: $answer=subreply($cmd,$server);
3491: }
3492: } else {
3493: $answer='self_reply';
3494: }
3495: return $answer;
3496: }
3497:
3498: # -------------------------------------------------------------- Talk to lonsql
3499:
3500: sub sqlreply {
3501: my ($cmd)=@_;
3502: my $answer=subsqlreply($cmd);
3503: if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }
3504: return $answer;
3505: }
3506:
3507: sub subsqlreply {
3508: my ($cmd)=@_;
3509: my $unixsock="mysqlsock";
3510: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
3511: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
3512: Type => SOCK_STREAM,
3513: Timeout => 10)
3514: or return "con_lost";
3515: print $sclient "$cmd\n";
3516: my $answer=<$sclient>;
3517: chomp($answer);
3518: if (!$answer) { $answer="con_lost"; }
3519: return $answer;
3520: }
3521:
3522: # -------------------------------------------- Return path to profile directory
3523:
3524: sub propath {
3525: my ($udom,$uname)=@_;
3526: $udom=~s/\W//g;
3527: $uname=~s/\W//g;
3528: my $subdir=$uname.'__';
3529: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
3530: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
3531: return $proname;
3532: }
3533:
3534: # --------------------------------------- Is this the home server of an author?
3535:
3536: sub ishome {
3537: my $author=shift;
3538: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
3539: my ($udom,$uname)=split(/\//,$author);
3540: my $proname=propath($udom,$uname);
3541: if (-e $proname) {
3542: return 'owner';
3543: } else {
3544: return 'not_owner';
3545: }
3546: }
3547:
3548: # ======================================================= Continue main program
3549: # ---------------------------------------------------- Fork once and dissociate
3550:
3551: my $fpid=fork;
3552: exit if $fpid;
3553: die "Couldn't fork: $!" unless defined ($fpid);
3554:
3555: POSIX::setsid() or die "Can't start new session: $!";
3556:
3557: # ------------------------------------------------------- Write our PID on disk
3558:
3559: my $execdir=$perlvar{'lonDaemons'};
3560: open (PIDSAVE,">$execdir/logs/lond.pid");
3561: print PIDSAVE "$$\n";
3562: close(PIDSAVE);
3563: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
3564: &status('Starting');
3565:
3566:
3567:
3568: # ----------------------------------------------------- Install signal handlers
3569:
3570:
3571: $SIG{CHLD} = \&REAPER;
3572: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
3573: $SIG{HUP} = \&HUPSMAN;
3574: $SIG{USR1} = \&checkchildren;
3575: $SIG{USR2} = \&UpdateHosts;
3576:
3577: # Read the host hashes:
3578:
3579: ReadHostTable;
3580:
3581: # --------------------------------------------------------------
3582: # Accept connections. When a connection comes in, it is validated
3583: # and if good, a child process is created to process transactions
3584: # along the connection.
3585:
3586: while (1) {
3587: &status('Starting accept');
3588: $client = $server->accept() or next;
3589: &status('Accepted '.$client.' off to spawn');
3590: make_new_child($client);
3591: &status('Finished spawning');
3592: }
3593:
3594: sub make_new_child {
3595: my $pid;
3596: # my $cipher; # Now global
3597: my $sigset;
3598:
3599: $client = shift;
3600: &status('Starting new child '.$client);
3601: &logthis('<font color="green"> Attempting to start child ('.$client.
3602: ")</font>");
3603: # block signal for fork
3604: $sigset = POSIX::SigSet->new(SIGINT);
3605: sigprocmask(SIG_BLOCK, $sigset)
3606: or die "Can't block SIGINT for fork: $!\n";
3607:
3608: die "fork: $!" unless defined ($pid = fork);
3609:
3610: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
3611: # connection liveness.
3612:
3613: #
3614: # Figure out who we're talking to so we can record the peer in
3615: # the pid hash.
3616: #
3617: my $caller = getpeername($client);
3618: my ($port,$iaddr);
3619: if (defined($caller) && length($caller) > 0) {
3620: ($port,$iaddr)=unpack_sockaddr_in($caller);
3621: } else {
3622: &logthis("Unable to determine who caller was, getpeername returned nothing");
3623: }
3624: if (defined($iaddr)) {
3625: $clientip = inet_ntoa($iaddr);
3626: Debug("Connected with $clientip");
3627: $clientdns = gethostbyaddr($iaddr, AF_INET);
3628: Debug("Connected with $clientdns by name");
3629: } else {
3630: &logthis("Unable to determine clientip");
3631: $clientip='Unavailable';
3632: }
3633:
3634: if ($pid) {
3635: # Parent records the child's birth and returns.
3636: sigprocmask(SIG_UNBLOCK, $sigset)
3637: or die "Can't unblock SIGINT for fork: $!\n";
3638: $children{$pid} = $clientip;
3639: &status('Started child '.$pid);
3640: return;
3641: } else {
3642: # Child can *not* return from this subroutine.
3643: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
3644: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
3645: #don't get intercepted
3646: $SIG{USR1}= \&logstatus;
3647: $SIG{ALRM}= \&timeout;
3648: $lastlog='Forked ';
3649: $status='Forked';
3650:
3651: # unblock signals
3652: sigprocmask(SIG_UNBLOCK, $sigset)
3653: or die "Can't unblock SIGINT for fork: $!\n";
3654:
3655: # my $tmpsnum=0; # Now global
3656: #---------------------------------------------------- kerberos 5 initialization
3657: &Authen::Krb5::init_context();
3658: &Authen::Krb5::init_ets();
3659:
3660: &status('Accepted connection');
3661: # =============================================================================
3662: # do something with the connection
3663: # -----------------------------------------------------------------------------
3664: # see if we know client and 'check' for spoof IP by ineffective challenge
3665:
3666: ReadManagerTable; # May also be a manager!!
3667:
3668: my $clientrec=($hostid{$clientip} ne undef);
3669: my $ismanager=($managers{$clientip} ne undef);
3670: $clientname = "[unknonwn]";
3671: if($clientrec) { # Establish client type.
3672: $ConnectionType = "client";
3673: $clientname = $hostid{$clientip};
3674: if($ismanager) {
3675: $ConnectionType = "both";
3676: }
3677: } else {
3678: $ConnectionType = "manager";
3679: $clientname = $managers{$clientip};
3680: }
3681: my $clientok;
3682:
3683: if ($clientrec || $ismanager) {
3684: &status("Waiting for init from $clientip $clientname");
3685: &logthis('<font color="yellow">INFO: Connection, '.
3686: $clientip.
3687: " ($clientname) connection type = $ConnectionType </font>" );
3688: &status("Connecting $clientip ($clientname))");
3689: my $remotereq=<$client>;
3690: chomp($remotereq);
3691: Debug("Got init: $remotereq");
3692: my $inikeyword = split(/:/, $remotereq);
3693: if ($remotereq =~ /^init/) {
3694: &sethost("sethost:$perlvar{'lonHostID'}");
3695: #
3696: # If the remote is attempting a local init... give that a try:
3697: #
3698: my ($i, $inittype) = split(/:/, $remotereq);
3699:
3700: # If the connection type is ssl, but I didn't get my
3701: # certificate files yet, then I'll drop back to
3702: # insecure (if allowed).
3703:
3704: if($inittype eq "ssl") {
3705: my ($ca, $cert) = lonssl::CertificateFile;
3706: my $kfile = lonssl::KeyFile;
3707: if((!$ca) ||
3708: (!$cert) ||
3709: (!$kfile)) {
3710: $inittype = ""; # This forces insecure attempt.
3711: &logthis("<font color=\"blue\"> Certificates not "
3712: ."installed -- trying insecure auth</font>");
3713: }
3714: else { # SSL certificates are in place so
3715: } # Leave the inittype alone.
3716: }
3717:
3718: if($inittype eq "local") {
3719: my $key = LocalConnection($client, $remotereq);
3720: if($key) {
3721: Debug("Got local key $key");
3722: $clientok = 1;
3723: my $cipherkey = pack("H32", $key);
3724: $cipher = new IDEA($cipherkey);
3725: print $client "ok:local\n";
3726: &logthis('<font color="green"'
3727: . "Successful local authentication </font>");
3728: $keymode = "local"
3729: } else {
3730: Debug("Failed to get local key");
3731: $clientok = 0;
3732: shutdown($client, 3);
3733: close $client;
3734: }
3735: } elsif ($inittype eq "ssl") {
3736: my $key = SSLConnection($client);
3737: if ($key) {
3738: $clientok = 1;
3739: my $cipherkey = pack("H32", $key);
3740: $cipher = new IDEA($cipherkey);
3741: &logthis('<font color="green">'
3742: ."Successfull ssl authentication with $clientname </font>");
3743: $keymode = "ssl";
3744:
3745: } else {
3746: $clientok = 0;
3747: close $client;
3748: }
3749:
3750: } else {
3751: my $ok = InsecureConnection($client);
3752: if($ok) {
3753: $clientok = 1;
3754: &logthis('<font color="green">'
3755: ."Successful insecure authentication with $clientname </font>");
3756: print $client "ok\n";
3757: $keymode = "insecure";
3758: } else {
3759: &logthis('<font color="yellow">'
3760: ."Attempted insecure connection disallowed </font>");
3761: close $client;
3762: $clientok = 0;
3763:
3764: }
3765: }
3766: } else {
3767: &logthis(
3768: "<font color='blue'>WARNING: "
3769: ."$clientip failed to initialize: >$remotereq< </font>");
3770: &status('No init '.$clientip);
3771: }
3772:
3773: } else {
3774: &logthis(
3775: "<font color='blue'>WARNING: Unknown client $clientip</font>");
3776: &status('Hung up on '.$clientip);
3777: }
3778:
3779: if ($clientok) {
3780: # ---------------- New known client connecting, could mean machine online again
3781:
3782: foreach my $id (keys(%hostip)) {
3783: if ($hostip{$id} ne $clientip ||
3784: $hostip{$currenthostid} eq $clientip) {
3785: # no need to try to do recon's to myself
3786: next;
3787: }
3788: &reconlonc("$perlvar{'lonSockDir'}/$id");
3789: }
3790: &logthis("<font color='green'>Established connection: $clientname</font>");
3791: &status('Will listen to '.$clientname);
3792: # ------------------------------------------------------------ Process requests
3793: my $keep_going = 1;
3794: my $user_input;
3795: while(($user_input = get_request) && $keep_going) {
3796: alarm(120);
3797: Debug("Main: Got $user_input\n");
3798: $keep_going = &process_request($user_input);
3799: alarm(0);
3800: &status('Listening to '.$clientname." ($keymode)");
3801: }
3802:
3803: # --------------------------------------------- client unknown or fishy, refuse
3804: } else {
3805: print $client "refused\n";
3806: $client->close();
3807: &logthis("<font color='blue'>WARNING: "
3808: ."Rejected client $clientip, closing connection</font>");
3809: }
3810: }
3811:
3812: # =============================================================================
3813:
3814: &logthis("<font color='red'>CRITICAL: "
3815: ."Disconnect from $clientip ($clientname)</font>");
3816:
3817:
3818: # this exit is VERY important, otherwise the child will become
3819: # a producer of more and more children, forking yourself into
3820: # process death.
3821: exit;
3822:
3823: }
3824:
3825:
3826: #
3827: # Checks to see if the input roleput request was to set
3828: # an author role. If so, invokes the lchtmldir script to set
3829: # up a correct public_html
3830: # Parameters:
3831: # request - The request sent to the rolesput subchunk.
3832: # We're looking for /domain/_au
3833: # domain - The domain in which the user is having roles doctored.
3834: # user - Name of the user for which the role is being put.
3835: # authtype - The authentication type associated with the user.
3836: #
3837: sub ManagePermissions
3838: {
3839:
3840: my ($request, $domain, $user, $authtype) = @_;
3841:
3842: # See if the request is of the form /$domain/_au
3843: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
3844: my $execdir = $perlvar{'lonDaemons'};
3845: my $userhome= "/home/$user" ;
3846: &logthis("system $execdir/lchtmldir $userhome $user $authtype");
3847: system("$execdir/lchtmldir $userhome $user $authtype");
3848: }
3849: }
3850: #
3851: # GetAuthType - Determines the authorization type of a user in a domain.
3852:
3853: # Returns the authorization type or nouser if there is no such user.
3854: #
3855: sub GetAuthType
3856: {
3857:
3858: my ($domain, $user) = @_;
3859:
3860: Debug("GetAuthType( $domain, $user ) \n");
3861: my $proname = &propath($domain, $user);
3862: my $passwdfile = "$proname/passwd";
3863: if( -e $passwdfile ) {
3864: my $pf = IO::File->new($passwdfile);
3865: my $realpassword = <$pf>;
3866: chomp($realpassword);
3867: Debug("Password info = $realpassword\n");
3868: my ($authtype, $contentpwd) = split(/:/, $realpassword);
3869: Debug("Authtype = $authtype, content = $contentpwd\n");
3870: my $availinfo = '';
3871: if($authtype eq 'krb4' or $authtype eq 'krb5') {
3872: $availinfo = $contentpwd;
3873: }
3874:
3875: return "$authtype:$availinfo";
3876: }
3877: else {
3878: Debug("Returning nouser");
3879: return "nouser";
3880: }
3881: }
3882:
3883: sub addline {
3884: my ($fname,$hostid,$ip,$newline)=@_;
3885: my $contents;
3886: my $found=0;
3887: my $expr='^'.$hostid.':'.$ip.':';
3888: $expr =~ s/\./\\\./g;
3889: my $sh;
3890: if ($sh=IO::File->new("$fname.subscription")) {
3891: while (my $subline=<$sh>) {
3892: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
3893: }
3894: $sh->close();
3895: }
3896: $sh=IO::File->new(">$fname.subscription");
3897: if ($contents) { print $sh $contents; }
3898: if ($newline) { print $sh $newline; }
3899: $sh->close();
3900: return $found;
3901: }
3902:
3903: sub getchat {
3904: my ($cdom,$cname,$udom,$uname)=@_;
3905: my %hash;
3906: my $proname=&propath($cdom,$cname);
3907: my @entries=();
3908: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
3909: &GDBM_READER(),0640)) {
3910: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
3911: untie %hash;
3912: }
3913: my @participants=();
3914: my $cutoff=time-60;
3915: if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db",
3916: &GDBM_WRCREAT(),0640)) {
3917: $hash{$uname.':'.$udom}=time;
3918: foreach (sort keys %hash) {
3919: if ($hash{$_}>$cutoff) {
3920: $participants[$#participants+1]='active_participant:'.$_;
3921: }
3922: }
3923: untie %hash;
3924: }
3925: return (@participants,@entries);
3926: }
3927:
3928: sub chatadd {
3929: my ($cdom,$cname,$newchat)=@_;
3930: my %hash;
3931: my $proname=&propath($cdom,$cname);
3932: my @entries=();
3933: my $time=time;
3934: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
3935: &GDBM_WRCREAT(),0640)) {
3936: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
3937: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
3938: my ($thentime,$idnum)=split(/\_/,$lastid);
3939: my $newid=$time.'_000000';
3940: if ($thentime==$time) {
3941: $idnum=~s/^0+//;
3942: $idnum++;
3943: $idnum=substr('000000'.$idnum,-6,6);
3944: $newid=$time.'_'.$idnum;
3945: }
3946: $hash{$newid}=$newchat;
3947: my $expired=$time-3600;
3948: foreach (keys %hash) {
3949: my ($thistime)=($_=~/(\d+)\_/);
3950: if ($thistime<$expired) {
3951: delete $hash{$_};
3952: }
3953: }
3954: untie %hash;
3955: }
3956: {
3957: my $hfh;
3958: if ($hfh=IO::File->new(">>$proname/chatroom.log")) {
3959: print $hfh "$time:".&unescape($newchat)."\n";
3960: }
3961: }
3962: }
3963:
3964: sub unsub {
3965: my ($fname,$clientip)=@_;
3966: my $result;
3967: my $unsubs = 0; # Number of successful unsubscribes:
3968:
3969:
3970: # An old way subscriptions were handled was to have a
3971: # subscription marker file:
3972:
3973: Debug("Attempting unlink of $fname.$clientname");
3974: if (unlink("$fname.$clientname")) {
3975: $unsubs++; # Successful unsub via marker file.
3976: }
3977:
3978: # The more modern way to do it is to have a subscription list
3979: # file:
3980:
3981: if (-e "$fname.subscription") {
3982: my $found=&addline($fname,$clientname,$clientip,'');
3983: if ($found) {
3984: $unsubs++;
3985: }
3986: }
3987:
3988: # If either or both of these mechanisms succeeded in unsubscribing a
3989: # resource we can return ok:
3990:
3991: if($unsubs) {
3992: $result = "ok\n";
3993: } else {
3994: $result = "not_subscribed\n";
3995: }
3996:
3997: return $result;
3998: }
3999:
4000: sub currentversion {
4001: my $fname=shift;
4002: my $version=-1;
4003: my $ulsdir='';
4004: if ($fname=~/^(.+)\/[^\/]+$/) {
4005: $ulsdir=$1;
4006: }
4007: my ($fnamere1,$fnamere2);
4008: # remove version if already specified
4009: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
4010: # get the bits that go before and after the version number
4011: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
4012: $fnamere1=$1;
4013: $fnamere2='.'.$2;
4014: }
4015: if (-e $fname) { $version=1; }
4016: if (-e $ulsdir) {
4017: if(-d $ulsdir) {
4018: if (opendir(LSDIR,$ulsdir)) {
4019: my $ulsfn;
4020: while ($ulsfn=readdir(LSDIR)) {
4021: # see if this is a regular file (ignore links produced earlier)
4022: my $thisfile=$ulsdir.'/'.$ulsfn;
4023: unless (-l $thisfile) {
4024: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
4025: if ($1>$version) { $version=$1; }
4026: }
4027: }
4028: }
4029: closedir(LSDIR);
4030: $version++;
4031: }
4032: }
4033: }
4034: return $version;
4035: }
4036:
4037: sub thisversion {
4038: my $fname=shift;
4039: my $version=-1;
4040: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
4041: $version=$1;
4042: }
4043: return $version;
4044: }
4045:
4046: sub subscribe {
4047: my ($userinput,$clientip)=@_;
4048: my $result;
4049: my ($cmd,$fname)=split(/:/,$userinput);
4050: my $ownership=&ishome($fname);
4051: if ($ownership eq 'owner') {
4052: # explitly asking for the current version?
4053: unless (-e $fname) {
4054: my $currentversion=¤tversion($fname);
4055: if (&thisversion($fname)==$currentversion) {
4056: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
4057: my $root=$1;
4058: my $extension=$2;
4059: symlink($root.'.'.$extension,
4060: $root.'.'.$currentversion.'.'.$extension);
4061: unless ($extension=~/\.meta$/) {
4062: symlink($root.'.'.$extension.'.meta',
4063: $root.'.'.$currentversion.'.'.$extension.'.meta');
4064: }
4065: }
4066: }
4067: }
4068: if (-e $fname) {
4069: if (-d $fname) {
4070: $result="directory\n";
4071: } else {
4072: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
4073: my $now=time;
4074: my $found=&addline($fname,$clientname,$clientip,
4075: "$clientname:$clientip:$now\n");
4076: if ($found) { $result="$fname\n"; }
4077: # if they were subscribed to only meta data, delete that
4078: # subscription, when you subscribe to a file you also get
4079: # the metadata
4080: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
4081: $fname=~s/\/home\/httpd\/html\/res/raw/;
4082: $fname="http://$thisserver/".$fname;
4083: $result="$fname\n";
4084: }
4085: } else {
4086: $result="not_found\n";
4087: }
4088: } else {
4089: $result="rejected\n";
4090: }
4091: return $result;
4092: }
4093:
4094: sub make_passwd_file {
4095: my ($uname, $umode,$npass,$passfilename)=@_;
4096: my $result="ok\n";
4097: if ($umode eq 'krb4' or $umode eq 'krb5') {
4098: {
4099: my $pf = IO::File->new(">$passfilename");
4100: print $pf "$umode:$npass\n";
4101: }
4102: } elsif ($umode eq 'internal') {
4103: my $salt=time;
4104: $salt=substr($salt,6,2);
4105: my $ncpass=crypt($npass,$salt);
4106: {
4107: &Debug("Creating internal auth");
4108: my $pf = IO::File->new(">$passfilename");
4109: print $pf "internal:$ncpass\n";
4110: }
4111: } elsif ($umode eq 'localauth') {
4112: {
4113: my $pf = IO::File->new(">$passfilename");
4114: print $pf "localauth:$npass\n";
4115: }
4116: } elsif ($umode eq 'unix') {
4117: {
4118: #
4119: # Don't allow the creation of privileged accounts!!! that would
4120: # be real bad!!!
4121: #
4122: my $uid = getpwnam($uname);
4123: if((defined $uid) && ($uid == 0)) {
4124: &logthis(">>>Attempted to create privilged account blocked");
4125: return "no_priv_account_error\n";
4126: }
4127:
4128: my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
4129: {
4130: &Debug("Executing external: ".$execpath);
4131: &Debug("user = ".$uname.", Password =". $npass);
4132: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
4133: print $se "$uname\n";
4134: print $se "$npass\n";
4135: print $se "$npass\n";
4136: }
4137: my $useraddok = $?;
4138: if($useraddok > 0) {
4139: &logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));
4140: }
4141: my $pf = IO::File->new(">$passfilename");
4142: print $pf "unix:\n";
4143: }
4144: } elsif ($umode eq 'none') {
4145: {
4146: my $pf = IO::File->new(">$passfilename");
4147: print $pf "none:\n";
4148: }
4149: } else {
4150: $result="auth_mode_error\n";
4151: }
4152: return $result;
4153: }
4154:
4155: sub sethost {
4156: my ($remotereq) = @_;
4157: my (undef,$hostid)=split(/:/,$remotereq);
4158: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
4159: if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
4160: $currenthostid =$hostid;
4161: $currentdomainid=$hostdom{$hostid};
4162: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
4163: } else {
4164: &logthis("Requested host id $hostid not an alias of ".
4165: $perlvar{'lonHostID'}." refusing connection");
4166: return 'unable_to_set';
4167: }
4168: return 'ok';
4169: }
4170:
4171: sub version {
4172: my ($userinput)=@_;
4173: $remoteVERSION=(split(/:/,$userinput))[1];
4174: return "version:$VERSION";
4175: }
4176:
4177: #There is a copy of this in lonnet.pm
4178: sub userload {
4179: my $numusers=0;
4180: {
4181: opendir(LONIDS,$perlvar{'lonIDsDir'});
4182: my $filename;
4183: my $curtime=time;
4184: while ($filename=readdir(LONIDS)) {
4185: if ($filename eq '.' || $filename eq '..') {next;}
4186: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
4187: if ($curtime-$mtime < 1800) { $numusers++; }
4188: }
4189: closedir(LONIDS);
4190: }
4191: my $userloadpercent=0;
4192: my $maxuserload=$perlvar{'lonUserLoadLim'};
4193: if ($maxuserload) {
4194: $userloadpercent=100*$numusers/$maxuserload;
4195: }
4196: $userloadpercent=sprintf("%.2f",$userloadpercent);
4197: return $userloadpercent;
4198: }
4199:
4200: # Routines for serializing arrays and hashes (copies from lonnet)
4201:
4202: sub array2str {
4203: my (@array) = @_;
4204: my $result=&arrayref2str(\@array);
4205: $result=~s/^__ARRAY_REF__//;
4206: $result=~s/__END_ARRAY_REF__$//;
4207: return $result;
4208: }
4209:
4210: sub arrayref2str {
4211: my ($arrayref) = @_;
4212: my $result='__ARRAY_REF__';
4213: foreach my $elem (@$arrayref) {
4214: if(ref($elem) eq 'ARRAY') {
4215: $result.=&arrayref2str($elem).'&';
4216: } elsif(ref($elem) eq 'HASH') {
4217: $result.=&hashref2str($elem).'&';
4218: } elsif(ref($elem)) {
4219: #print("Got a ref of ".(ref($elem))." skipping.");
4220: } else {
4221: $result.=&escape($elem).'&';
4222: }
4223: }
4224: $result=~s/\&$//;
4225: $result .= '__END_ARRAY_REF__';
4226: return $result;
4227: }
4228:
4229: sub hash2str {
4230: my (%hash) = @_;
4231: my $result=&hashref2str(\%hash);
4232: $result=~s/^__HASH_REF__//;
4233: $result=~s/__END_HASH_REF__$//;
4234: return $result;
4235: }
4236:
4237: sub hashref2str {
4238: my ($hashref)=@_;
4239: my $result='__HASH_REF__';
4240: foreach (sort(keys(%$hashref))) {
4241: if (ref($_) eq 'ARRAY') {
4242: $result.=&arrayref2str($_).'=';
4243: } elsif (ref($_) eq 'HASH') {
4244: $result.=&hashref2str($_).'=';
4245: } elsif (ref($_)) {
4246: $result.='=';
4247: #print("Got a ref of ".(ref($_))." skipping.");
4248: } else {
4249: if ($_) {$result.=&escape($_).'=';} else { last; }
4250: }
4251:
4252: if(ref($hashref->{$_}) eq 'ARRAY') {
4253: $result.=&arrayref2str($hashref->{$_}).'&';
4254: } elsif(ref($hashref->{$_}) eq 'HASH') {
4255: $result.=&hashref2str($hashref->{$_}).'&';
4256: } elsif(ref($hashref->{$_})) {
4257: $result.='&';
4258: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
4259: } else {
4260: $result.=&escape($hashref->{$_}).'&';
4261: }
4262: }
4263: $result=~s/\&$//;
4264: $result .= '__END_HASH_REF__';
4265: return $result;
4266: }
4267:
4268: # ----------------------------------- POD (plain old documentation, CPAN style)
4269:
4270: =head1 NAME
4271:
4272: lond - "LON Daemon" Server (port "LOND" 5663)
4273:
4274: =head1 SYNOPSIS
4275:
4276: Usage: B<lond>
4277:
4278: Should only be run as user=www. This is a command-line script which
4279: is invoked by B<loncron>. There is no expectation that a typical user
4280: will manually start B<lond> from the command-line. (In other words,
4281: DO NOT START B<lond> YOURSELF.)
4282:
4283: =head1 DESCRIPTION
4284:
4285: There are two characteristics associated with the running of B<lond>,
4286: PROCESS MANAGEMENT (starting, stopping, handling child processes)
4287: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
4288: subscriptions, etc). These are described in two large
4289: sections below.
4290:
4291: B<PROCESS MANAGEMENT>
4292:
4293: Preforker - server who forks first. Runs as a daemon. HUPs.
4294: Uses IDEA encryption
4295:
4296: B<lond> forks off children processes that correspond to the other servers
4297: in the network. Management of these processes can be done at the
4298: parent process level or the child process level.
4299:
4300: B<logs/lond.log> is the location of log messages.
4301:
4302: The process management is now explained in terms of linux shell commands,
4303: subroutines internal to this code, and signal assignments:
4304:
4305: =over 4
4306:
4307: =item *
4308:
4309: PID is stored in B<logs/lond.pid>
4310:
4311: This is the process id number of the parent B<lond> process.
4312:
4313: =item *
4314:
4315: SIGTERM and SIGINT
4316:
4317: Parent signal assignment:
4318: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
4319:
4320: Child signal assignment:
4321: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
4322: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
4323: to restart a new child.)
4324:
4325: Command-line invocations:
4326: B<kill> B<-s> SIGTERM I<PID>
4327: B<kill> B<-s> SIGINT I<PID>
4328:
4329: Subroutine B<HUNTSMAN>:
4330: This is only invoked for the B<lond> parent I<PID>.
4331: This kills all the children, and then the parent.
4332: The B<lonc.pid> file is cleared.
4333:
4334: =item *
4335:
4336: SIGHUP
4337:
4338: Current bug:
4339: This signal can only be processed the first time
4340: on the parent process. Subsequent SIGHUP signals
4341: have no effect.
4342:
4343: Parent signal assignment:
4344: $SIG{HUP} = \&HUPSMAN;
4345:
4346: Child signal assignment:
4347: none (nothing happens)
4348:
4349: Command-line invocations:
4350: B<kill> B<-s> SIGHUP I<PID>
4351:
4352: Subroutine B<HUPSMAN>:
4353: This is only invoked for the B<lond> parent I<PID>,
4354: This kills all the children, and then the parent.
4355: The B<lond.pid> file is cleared.
4356:
4357: =item *
4358:
4359: SIGUSR1
4360:
4361: Parent signal assignment:
4362: $SIG{USR1} = \&USRMAN;
4363:
4364: Child signal assignment:
4365: $SIG{USR1}= \&logstatus;
4366:
4367: Command-line invocations:
4368: B<kill> B<-s> SIGUSR1 I<PID>
4369:
4370: Subroutine B<USRMAN>:
4371: When invoked for the B<lond> parent I<PID>,
4372: SIGUSR1 is sent to all the children, and the status of
4373: each connection is logged.
4374:
4375: =item *
4376:
4377: SIGUSR2
4378:
4379: Parent Signal assignment:
4380: $SIG{USR2} = \&UpdateHosts
4381:
4382: Child signal assignment:
4383: NONE
4384:
4385:
4386: =item *
4387:
4388: SIGCHLD
4389:
4390: Parent signal assignment:
4391: $SIG{CHLD} = \&REAPER;
4392:
4393: Child signal assignment:
4394: none
4395:
4396: Command-line invocations:
4397: B<kill> B<-s> SIGCHLD I<PID>
4398:
4399: Subroutine B<REAPER>:
4400: This is only invoked for the B<lond> parent I<PID>.
4401: Information pertaining to the child is removed.
4402: The socket port is cleaned up.
4403:
4404: =back
4405:
4406: B<SERVER-SIDE ACTIVITIES>
4407:
4408: Server-side information can be accepted in an encrypted or non-encrypted
4409: method.
4410:
4411: =over 4
4412:
4413: =item ping
4414:
4415: Query a client in the hosts.tab table; "Are you there?"
4416:
4417: =item pong
4418:
4419: Respond to a ping query.
4420:
4421: =item ekey
4422:
4423: Read in encrypted key, make cipher. Respond with a buildkey.
4424:
4425: =item load
4426:
4427: Respond with CPU load based on a computation upon /proc/loadavg.
4428:
4429: =item currentauth
4430:
4431: Reply with current authentication information (only over an
4432: encrypted channel).
4433:
4434: =item auth
4435:
4436: Only over an encrypted channel, reply as to whether a user's
4437: authentication information can be validated.
4438:
4439: =item passwd
4440:
4441: Allow for a password to be set.
4442:
4443: =item makeuser
4444:
4445: Make a user.
4446:
4447: =item passwd
4448:
4449: Allow for authentication mechanism and password to be changed.
4450:
4451: =item home
4452:
4453: Respond to a question "are you the home for a given user?"
4454:
4455: =item update
4456:
4457: Update contents of a subscribed resource.
4458:
4459: =item unsubscribe
4460:
4461: The server is unsubscribing from a resource.
4462:
4463: =item subscribe
4464:
4465: The server is subscribing to a resource.
4466:
4467: =item log
4468:
4469: Place in B<logs/lond.log>
4470:
4471: =item put
4472:
4473: stores hash in namespace
4474:
4475: =item rolesput
4476:
4477: put a role into a user's environment
4478:
4479: =item get
4480:
4481: returns hash with keys from array
4482: reference filled in from namespace
4483:
4484: =item eget
4485:
4486: returns hash with keys from array
4487: reference filled in from namesp (encrypts the return communication)
4488:
4489: =item rolesget
4490:
4491: get a role from a user's environment
4492:
4493: =item del
4494:
4495: deletes keys out of array from namespace
4496:
4497: =item keys
4498:
4499: returns namespace keys
4500:
4501: =item dump
4502:
4503: dumps the complete (or key matching regexp) namespace into a hash
4504:
4505: =item store
4506:
4507: stores hash permanently
4508: for this url; hashref needs to be given and should be a \%hashname; the
4509: remaining args aren't required and if they aren't passed or are '' they will
4510: be derived from the ENV
4511:
4512: =item restore
4513:
4514: returns a hash for a given url
4515:
4516: =item querysend
4517:
4518: Tells client about the lonsql process that has been launched in response
4519: to a sent query.
4520:
4521: =item queryreply
4522:
4523: Accept information from lonsql and make appropriate storage in temporary
4524: file space.
4525:
4526: =item idput
4527:
4528: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
4529: for each student, defined perhaps by the institutional Registrar.)
4530:
4531: =item idget
4532:
4533: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
4534: for each student, defined perhaps by the institutional Registrar.)
4535:
4536: =item tmpput
4537:
4538: Accept and store information in temporary space.
4539:
4540: =item tmpget
4541:
4542: Send along temporarily stored information.
4543:
4544: =item ls
4545:
4546: List part of a user's directory.
4547:
4548: =item pushtable
4549:
4550: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
4551: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
4552: must be restored manually in case of a problem with the new table file.
4553: pushtable requires that the request be encrypted and validated via
4554: ValidateManager. The form of the command is:
4555: enc:pushtable tablename <tablecontents> \n
4556: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
4557: cleartext newline.
4558:
4559: =item Hanging up (exit or init)
4560:
4561: What to do when a client tells the server that they (the client)
4562: are leaving the network.
4563:
4564: =item unknown command
4565:
4566: If B<lond> is sent an unknown command (not in the list above),
4567: it replys to the client "unknown_cmd".
4568:
4569:
4570: =item UNKNOWN CLIENT
4571:
4572: If the anti-spoofing algorithm cannot verify the client,
4573: the client is rejected (with a "refused" message sent
4574: to the client, and the connection is closed.
4575:
4576: =back
4577:
4578: =head1 PREREQUISITES
4579:
4580: IO::Socket
4581: IO::File
4582: Apache::File
4583: Symbol
4584: POSIX
4585: Crypt::IDEA
4586: LWP::UserAgent()
4587: GDBM_File
4588: Authen::Krb4
4589: Authen::Krb5
4590:
4591: =head1 COREQUISITES
4592:
4593: =head1 OSNAMES
4594:
4595: linux
4596:
4597: =head1 SCRIPT CATEGORIES
4598:
4599: Server/Process
4600:
4601: =cut
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