Annotation of loncom/lond, revision 1.260
1.1 albertel 1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
1.60 www 4: #
1.260 ! foxr 5: # $Id: lond,v 1.259 2004/09/24 14:15:03 raeburn Exp $
1.60 www 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
1.167 foxr 13: # the Free Software Foundation; either version 2 of the License, or
1.60 www 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
1.178 foxr 23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
1.60 www 24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
1.161 foxr 27:
28:
1.60 www 29: # http://www.lon-capa.org/
30: #
1.54 harris41 31:
1.134 albertel 32: use strict;
1.80 harris41 33: use lib '/home/httpd/lib/perl/';
34: use LONCAPA::Configuration;
35:
1.1 albertel 36: use IO::Socket;
37: use IO::File;
1.126 albertel 38: #use Apache::File;
1.1 albertel 39: use Symbol;
40: use POSIX;
41: use Crypt::IDEA;
42: use LWP::UserAgent();
1.3 www 43: use GDBM_File;
44: use Authen::Krb4;
1.91 albertel 45: use Authen::Krb5;
1.49 albertel 46: use lib '/home/httpd/lib/perl/';
47: use localauth;
1.193 raeburn 48: use localenroll;
1.143 foxr 49: use File::Copy;
1.169 foxr 50: use LONCAPA::ConfigFileEdit;
1.200 matthew 51: use LONCAPA::lonlocal;
52: use LONCAPA::lonssl;
1.221 albertel 53: use Fcntl qw(:flock);
1.1 albertel 54:
1.239 foxr 55: my $DEBUG = 0; # Non zero to enable debug log entries.
1.77 foxr 56:
1.57 www 57: my $status='';
58: my $lastlog='';
59:
1.260 ! foxr 60: my $VERSION='$Revision: 1.259 $'; #' stupid emacs
1.121 albertel 61: my $remoteVERSION;
1.214 foxr 62: my $currenthostid="default";
1.115 albertel 63: my $currentdomainid;
1.134 albertel 64:
65: my $client;
1.200 matthew 66: my $clientip; # IP address of client.
67: my $clientdns; # DNS name of client.
68: my $clientname; # LonCAPA name of client.
1.140 foxr 69:
1.134 albertel 70: my $server;
1.200 matthew 71: my $thisserver; # DNS of us.
72:
73: my $keymode;
1.198 foxr 74:
1.207 foxr 75: my $cipher; # Cipher key negotiated with client
76: my $tmpsnum = 0; # Id of tmpputs.
77:
1.178 foxr 78: #
79: # Connection type is:
80: # client - All client actions are allowed
81: # manager - only management functions allowed.
82: # both - Both management and client actions are allowed
83: #
1.161 foxr 84:
1.178 foxr 85: my $ConnectionType;
1.161 foxr 86:
1.200 matthew 87: my %hostid; # ID's for hosts in cluster by ip.
88: my %hostdom; # LonCAPA domain for hosts in cluster.
89: my %hostip; # IPs for hosts in cluster.
90: my %hostdns; # ID's of hosts looked up by DNS name.
1.161 foxr 91:
1.178 foxr 92: my %managers; # Ip -> manager names
1.161 foxr 93:
1.178 foxr 94: my %perlvar; # Will have the apache conf defined perl vars.
1.134 albertel 95:
1.178 foxr 96: #
1.207 foxr 97: # The hash below is used for command dispatching, and is therefore keyed on the request keyword.
98: # Each element of the hash contains a reference to an array that contains:
99: # A reference to a sub that executes the request corresponding to the keyword.
100: # A flag that is true if the request must be encoded to be acceptable.
101: # A mask with bits as follows:
102: # CLIENT_OK - Set when the function is allowed by ordinary clients
103: # MANAGER_OK - Set when the function is allowed to manager clients.
104: #
105: my $CLIENT_OK = 1;
106: my $MANAGER_OK = 2;
107: my %Dispatcher;
108:
109:
110: #
1.178 foxr 111: # The array below are password error strings."
112: #
113: my $lastpwderror = 13; # Largest error number from lcpasswd.
114: my @passwderrors = ("ok",
115: "lcpasswd must be run as user 'www'",
116: "lcpasswd got incorrect number of arguments",
117: "lcpasswd did not get the right nubmer of input text lines",
118: "lcpasswd too many simultaneous pwd changes in progress",
119: "lcpasswd User does not exist.",
120: "lcpasswd Incorrect current passwd",
121: "lcpasswd Unable to su to root.",
122: "lcpasswd Cannot set new passwd.",
123: "lcpasswd Username has invalid characters",
124: "lcpasswd Invalid characters in password",
1.223 foxr 125: "lcpasswd User already exists",
126: "lcpasswd Something went wrong with user addition.",
127: "lcpasswd Password mismatch",
128: "lcpasswd Error filename is invalid");
1.97 foxr 129:
130:
1.178 foxr 131: # The array below are lcuseradd error strings.:
1.97 foxr 132:
1.178 foxr 133: my $lastadderror = 13;
134: my @adderrors = ("ok",
135: "User ID mismatch, lcuseradd must run as user www",
136: "lcuseradd Incorrect number of command line parameters must be 3",
137: "lcuseradd Incorrect number of stdinput lines, must be 3",
138: "lcuseradd Too many other simultaneous pwd changes in progress",
139: "lcuseradd User does not exist",
140: "lcuseradd Unable to make www member of users's group",
141: "lcuseradd Unable to su to root",
142: "lcuseradd Unable to set password",
143: "lcuseradd Usrname has invalid characters",
144: "lcuseradd Password has an invalid character",
145: "lcuseradd User already exists",
146: "lcuseradd Could not add user.",
147: "lcuseradd Password mismatch");
1.97 foxr 148:
1.96 foxr 149:
1.207 foxr 150:
151: #
152: # Statistics that are maintained and dislayed in the status line.
153: #
1.212 foxr 154: my $Transactions = 0; # Number of attempted transactions.
155: my $Failures = 0; # Number of transcations failed.
1.207 foxr 156:
157: # ResetStatistics:
158: # Resets the statistics counters:
159: #
160: sub ResetStatistics {
161: $Transactions = 0;
162: $Failures = 0;
163: }
164:
1.200 matthew 165: #------------------------------------------------------------------------
166: #
167: # LocalConnection
168: # Completes the formation of a locally authenticated connection.
169: # This function will ensure that the 'remote' client is really the
170: # local host. If not, the connection is closed, and the function fails.
171: # If so, initcmd is parsed for the name of a file containing the
172: # IDEA session key. The fie is opened, read, deleted and the session
173: # key returned to the caller.
174: #
175: # Parameters:
176: # $Socket - Socket open on client.
177: # $initcmd - The full text of the init command.
178: #
179: # Implicit inputs:
180: # $clientdns - The DNS name of the remote client.
181: # $thisserver - Our DNS name.
182: #
183: # Returns:
184: # IDEA session key on success.
185: # undef on failure.
186: #
187: sub LocalConnection {
188: my ($Socket, $initcmd) = @_;
189: Debug("Attempting local connection: $initcmd client: $clientdns me: $thisserver");
190: if($clientdns ne $thisserver) {
191: &logthis('<font color="red"> LocalConnection rejecting non local: '
192: ."$clientdns ne $thisserver </font>");
193: close $Socket;
194: return undef;
1.224 foxr 195: } else {
1.200 matthew 196: chomp($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;
1.224 foxr 326: } else {
1.200 matthew 327: logthis("<font color='blue'>WARNING client did not respond to challenge</font>");
328: &status("No challenge reqply");
329: return 0;
330: }
331:
332:
333: }
1.251 foxr 334: #
335: # Safely execute a command (as long as it's not a shel command and doesn
336: # not require/rely on shell escapes. The function operates by doing a
337: # a pipe based fork and capturing stdout and stderr from the pipe.
338: #
339: # Formal Parameters:
340: # $line - A line of text to be executed as a command.
341: # Returns:
342: # The output from that command. If the output is multiline the caller
343: # must know how to split up the output.
344: #
345: #
346: sub execute_command {
347: my ($line) = @_;
348: my @words = split(/\s/, $line); # Bust the command up into words.
349: my $output = "";
350:
351: my $pid = open(CHILD, "-|");
352:
353: if($pid) { # Parent process
354: Debug("In parent process for execute_command");
355: my @data = <CHILD>; # Read the child's outupt...
356: close CHILD;
357: foreach my $output_line (@data) {
358: Debug("Adding $output_line");
359: $output .= $output_line; # Presumably has a \n on it.
360: }
361:
362: } else { # Child process
363: close (STDERR);
364: open (STDERR, ">&STDOUT");# Combine stderr, and stdout...
365: exec(@words); # won't return.
366: }
367: return $output;
368: }
369:
1.200 matthew 370:
1.140 foxr 371: # GetCertificate: Given a transaction that requires a certificate,
372: # this function will extract the certificate from the transaction
373: # request. Note that at this point, the only concept of a certificate
374: # is the hostname to which we are connected.
375: #
376: # Parameter:
377: # request - The request sent by our client (this parameterization may
378: # need to change when we really use a certificate granting
379: # authority.
380: #
381: sub GetCertificate {
382: my $request = shift;
383:
384: return $clientip;
385: }
1.161 foxr 386:
1.178 foxr 387: #
388: # Return true if client is a manager.
389: #
390: sub isManager {
391: return (($ConnectionType eq "manager") || ($ConnectionType eq "both"));
392: }
393: #
394: # Return tru if client can do client functions
395: #
396: sub isClient {
397: return (($ConnectionType eq "client") || ($ConnectionType eq "both"));
398: }
1.161 foxr 399:
400:
1.156 foxr 401: #
402: # ReadManagerTable: Reads in the current manager table. For now this is
403: # done on each manager authentication because:
404: # - These authentications are not frequent
405: # - This allows dynamic changes to the manager table
406: # without the need to signal to the lond.
407: #
408: sub ReadManagerTable {
409:
410: # Clean out the old table first..
411:
1.166 foxr 412: foreach my $key (keys %managers) {
413: delete $managers{$key};
414: }
415:
416: my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
417: if (!open (MANAGERS, $tablename)) {
418: logthis('<font color="red">No manager table. Nobody can manage!!</font>');
419: return;
420: }
421: while(my $host = <MANAGERS>) {
422: chomp($host);
423: if ($host =~ "^#") { # Comment line.
424: next;
425: }
426: if (!defined $hostip{$host}) { # This is a non cluster member
1.161 foxr 427: # The entry is of the form:
428: # cluname:hostname
429: # cluname - A 'cluster hostname' is needed in order to negotiate
430: # the host key.
431: # hostname- The dns name of the host.
432: #
1.166 foxr 433: my($cluname, $dnsname) = split(/:/, $host);
434:
435: my $ip = gethostbyname($dnsname);
436: if(defined($ip)) { # bad names don't deserve entry.
437: my $hostip = inet_ntoa($ip);
438: $managers{$hostip} = $cluname;
439: logthis('<font color="green"> registering manager '.
440: "$dnsname as $cluname with $hostip </font>\n");
441: }
442: } else {
443: logthis('<font color="green"> existing host'." $host</font>\n");
444: $managers{$hostip{$host}} = $host; # Use info from cluster tab if clumemeber
445: }
446: }
1.156 foxr 447: }
1.140 foxr 448:
449: #
450: # ValidManager: Determines if a given certificate represents a valid manager.
451: # in this primitive implementation, the 'certificate' is
452: # just the connecting loncapa client name. This is checked
453: # against a valid client list in the configuration.
454: #
455: #
456: sub ValidManager {
457: my $certificate = shift;
458:
1.163 foxr 459: return isManager;
1.140 foxr 460: }
461: #
1.143 foxr 462: # CopyFile: Called as part of the process of installing a
463: # new configuration file. This function copies an existing
464: # file to a backup file.
465: # Parameters:
466: # oldfile - Name of the file to backup.
467: # newfile - Name of the backup file.
468: # Return:
469: # 0 - Failure (errno has failure reason).
470: # 1 - Success.
471: #
472: sub CopyFile {
1.192 foxr 473:
474: my ($oldfile, $newfile) = @_;
1.143 foxr 475:
476: # The file must exist:
477:
478: if(-e $oldfile) {
479:
480: # Read the old file.
481:
482: my $oldfh = IO::File->new("< $oldfile");
483: if(!$oldfh) {
484: return 0;
485: }
486: my @contents = <$oldfh>; # Suck in the entire file.
487:
488: # write the backup file:
489:
490: my $newfh = IO::File->new("> $newfile");
491: if(!(defined $newfh)){
492: return 0;
493: }
494: my $lines = scalar @contents;
495: for (my $i =0; $i < $lines; $i++) {
496: print $newfh ($contents[$i]);
497: }
498:
499: $oldfh->close;
500: $newfh->close;
501:
502: chmod(0660, $newfile);
503:
504: return 1;
505:
506: } else {
507: return 0;
508: }
509: }
1.157 foxr 510: #
511: # Host files are passed out with externally visible host IPs.
512: # If, for example, we are behind a fire-wall or NAT host, our
513: # internally visible IP may be different than the externally
514: # visible IP. Therefore, we always adjust the contents of the
515: # host file so that the entry for ME is the IP that we believe
516: # we have. At present, this is defined as the entry that
517: # DNS has for us. If by some chance we are not able to get a
518: # DNS translation for us, then we assume that the host.tab file
519: # is correct.
520: # BUGBUGBUG - in the future, we really should see if we can
521: # easily query the interface(s) instead.
522: # Parameter(s):
523: # contents - The contents of the host.tab to check.
524: # Returns:
525: # newcontents - The adjusted contents.
526: #
527: #
528: sub AdjustHostContents {
529: my $contents = shift;
530: my $adjusted;
531: my $me = $perlvar{'lonHostID'};
532:
1.166 foxr 533: foreach my $line (split(/\n/,$contents)) {
1.157 foxr 534: if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/))) {
535: chomp($line);
536: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
537: if ($id eq $me) {
1.166 foxr 538: my $ip = gethostbyname($name);
539: my $ipnew = inet_ntoa($ip);
540: $ip = $ipnew;
1.157 foxr 541: # Reconstruct the host line and append to adjusted:
542:
1.166 foxr 543: my $newline = "$id:$domain:$role:$name:$ip";
544: if($maxcon ne "") { # Not all hosts have loncnew tuning params
545: $newline .= ":$maxcon:$idleto:$mincon";
546: }
547: $adjusted .= $newline."\n";
1.157 foxr 548:
1.166 foxr 549: } else { # Not me, pass unmodified.
550: $adjusted .= $line."\n";
551: }
1.157 foxr 552: } else { # Blank or comment never re-written.
553: $adjusted .= $line."\n"; # Pass blanks and comments as is.
554: }
1.166 foxr 555: }
556: return $adjusted;
1.157 foxr 557: }
1.143 foxr 558: #
559: # InstallFile: Called to install an administrative file:
560: # - The file is created with <name>.tmp
561: # - The <name>.tmp file is then mv'd to <name>
562: # This lugubrious procedure is done to ensure that we are never without
563: # a valid, even if dated, version of the file regardless of who crashes
564: # and when the crash occurs.
565: #
566: # Parameters:
567: # Name of the file
568: # File Contents.
569: # Return:
570: # nonzero - success.
571: # 0 - failure and $! has an errno.
572: #
573: sub InstallFile {
1.192 foxr 574:
575: my ($Filename, $Contents) = @_;
1.143 foxr 576: my $TempFile = $Filename.".tmp";
577:
578: # Open the file for write:
579:
580: my $fh = IO::File->new("> $TempFile"); # Write to temp.
581: if(!(defined $fh)) {
582: &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
583: return 0;
584: }
585: # write the contents of the file:
586:
587: print $fh ($Contents);
588: $fh->close; # In case we ever have a filesystem w. locking
589:
590: chmod(0660, $TempFile);
591:
592: # Now we can move install the file in position.
593:
594: move($TempFile, $Filename);
595:
596: return 1;
597: }
1.200 matthew 598:
599:
1.169 foxr 600: #
601: # ConfigFileFromSelector: converts a configuration file selector
602: # (one of host or domain at this point) into a
603: # configuration file pathname.
604: #
605: # Parameters:
606: # selector - Configuration file selector.
607: # Returns:
608: # Full path to the file or undef if the selector is invalid.
609: #
610: sub ConfigFileFromSelector {
611: my $selector = shift;
612: my $tablefile;
613:
614: my $tabledir = $perlvar{'lonTabDir'}.'/';
615: if ($selector eq "hosts") {
616: $tablefile = $tabledir."hosts.tab";
617: } elsif ($selector eq "domain") {
618: $tablefile = $tabledir."domain.tab";
619: } else {
620: return undef;
621: }
622: return $tablefile;
1.143 foxr 623:
1.169 foxr 624: }
1.143 foxr 625: #
1.141 foxr 626: # PushFile: Called to do an administrative push of a file.
627: # - Ensure the file being pushed is one we support.
628: # - Backup the old file to <filename.saved>
629: # - Separate the contents of the new file out from the
630: # rest of the request.
631: # - Write the new file.
632: # Parameter:
633: # Request - The entire user request. This consists of a : separated
634: # string pushfile:tablename:contents.
635: # NOTE: The contents may have :'s in it as well making things a bit
636: # more interesting... but not much.
637: # Returns:
638: # String to send to client ("ok" or "refused" if bad file).
639: #
640: sub PushFile {
641: my $request = shift;
642: my ($command, $filename, $contents) = split(":", $request, 3);
643:
644: # At this point in time, pushes for only the following tables are
645: # supported:
646: # hosts.tab ($filename eq host).
647: # domain.tab ($filename eq domain).
648: # Construct the destination filename or reject the request.
649: #
650: # lonManage is supposed to ensure this, however this session could be
651: # part of some elaborate spoof that managed somehow to authenticate.
652: #
653:
1.169 foxr 654:
655: my $tablefile = ConfigFileFromSelector($filename);
656: if(! (defined $tablefile)) {
1.141 foxr 657: return "refused";
658: }
659: #
660: # >copy< the old table to the backup table
661: # don't rename in case system crashes/reboots etc. in the time
662: # window between a rename and write.
663: #
664: my $backupfile = $tablefile;
665: $backupfile =~ s/\.tab$/.old/;
1.143 foxr 666: if(!CopyFile($tablefile, $backupfile)) {
667: &logthis('<font color="green"> CopyFile from '.$tablefile." to ".$backupfile." failed </font>");
668: return "error:$!";
669: }
1.141 foxr 670: &logthis('<font color="green"> Pushfile: backed up '
671: .$tablefile." to $backupfile</font>");
672:
1.157 foxr 673: # If the file being pushed is the host file, we adjust the entry for ourself so that the
674: # IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible
675: # to conceive of conditions where we don't have a DNS entry locally. This is possible in a
676: # network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
677: # that possibilty.
678:
679: if($filename eq "host") {
680: $contents = AdjustHostContents($contents);
681: }
682:
1.141 foxr 683: # Install the new file:
684:
1.143 foxr 685: if(!InstallFile($tablefile, $contents)) {
686: &logthis('<font color="red"> Pushfile: unable to install '
1.145 foxr 687: .$tablefile." $! </font>");
1.143 foxr 688: return "error:$!";
1.224 foxr 689: } else {
1.143 foxr 690: &logthis('<font color="green"> Installed new '.$tablefile
691: ."</font>");
692:
693: }
694:
1.141 foxr 695:
696: # Indicate success:
697:
698: return "ok";
699:
700: }
1.145 foxr 701:
702: #
703: # Called to re-init either lonc or lond.
704: #
705: # Parameters:
706: # request - The full request by the client. This is of the form
707: # reinit:<process>
708: # where <process> is allowed to be either of
709: # lonc or lond
710: #
711: # Returns:
712: # The string to be sent back to the client either:
713: # ok - Everything worked just fine.
714: # error:why - There was a failure and why describes the reason.
715: #
716: #
717: sub ReinitProcess {
718: my $request = shift;
719:
1.146 foxr 720:
721: # separate the request (reinit) from the process identifier and
722: # validate it producing the name of the .pid file for the process.
723: #
724: #
725: my ($junk, $process) = split(":", $request);
1.147 foxr 726: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
1.146 foxr 727: if($process eq 'lonc') {
728: $processpidfile = $processpidfile."lonc.pid";
1.147 foxr 729: if (!open(PIDFILE, "< $processpidfile")) {
730: return "error:Open failed for $processpidfile";
731: }
732: my $loncpid = <PIDFILE>;
733: close(PIDFILE);
734: logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
735: ."</font>");
736: kill("USR2", $loncpid);
1.146 foxr 737: } elsif ($process eq 'lond') {
1.147 foxr 738: logthis('<font color="red"> Reinitializing self (lond) </font>');
739: &UpdateHosts; # Lond is us!!
1.146 foxr 740: } else {
741: &logthis('<font color="yellow" Invalid reinit request for '.$process
742: ."</font>");
743: return "error:Invalid process identifier $process";
744: }
1.145 foxr 745: return 'ok';
746: }
1.168 foxr 747: # Validate a line in a configuration file edit script:
748: # Validation includes:
749: # - Ensuring the command is valid.
750: # - Ensuring the command has sufficient parameters
751: # Parameters:
752: # scriptline - A line to validate (\n has been stripped for what it's worth).
1.167 foxr 753: #
1.168 foxr 754: # Return:
755: # 0 - Invalid scriptline.
756: # 1 - Valid scriptline
757: # NOTE:
758: # Only the command syntax is checked, not the executability of the
759: # command.
760: #
761: sub isValidEditCommand {
762: my $scriptline = shift;
763:
764: # Line elements are pipe separated:
765:
766: my ($command, $key, $newline) = split(/\|/, $scriptline);
767: &logthis('<font color="green"> isValideditCommand checking: '.
768: "Command = '$command', Key = '$key', Newline = '$newline' </font>\n");
769:
770: if ($command eq "delete") {
771: #
772: # key with no newline.
773: #
774: if( ($key eq "") || ($newline ne "")) {
775: return 0; # Must have key but no newline.
776: } else {
777: return 1; # Valid syntax.
778: }
1.169 foxr 779: } elsif ($command eq "replace") {
1.168 foxr 780: #
781: # key and newline:
782: #
783: if (($key eq "") || ($newline eq "")) {
784: return 0;
785: } else {
786: return 1;
787: }
1.169 foxr 788: } elsif ($command eq "append") {
789: if (($key ne "") && ($newline eq "")) {
790: return 1;
791: } else {
792: return 0;
793: }
1.168 foxr 794: } else {
795: return 0; # Invalid command.
796: }
797: return 0; # Should not get here!!!
798: }
1.169 foxr 799: #
800: # ApplyEdit - Applies an edit command to a line in a configuration
801: # file. It is the caller's responsiblity to validate the
802: # edit line.
803: # Parameters:
804: # $directive - A single edit directive to apply.
805: # Edit directives are of the form:
806: # append|newline - Appends a new line to the file.
807: # replace|key|newline - Replaces the line with key value 'key'
808: # delete|key - Deletes the line with key value 'key'.
809: # $editor - A config file editor object that contains the
810: # file being edited.
811: #
812: sub ApplyEdit {
1.192 foxr 813:
814: my ($directive, $editor) = @_;
1.169 foxr 815:
816: # Break the directive down into its command and its parameters
817: # (at most two at this point. The meaning of the parameters, if in fact
818: # they exist depends on the command).
819:
820: my ($command, $p1, $p2) = split(/\|/, $directive);
821:
822: if($command eq "append") {
823: $editor->Append($p1); # p1 - key p2 null.
824: } elsif ($command eq "replace") {
825: $editor->ReplaceLine($p1, $p2); # p1 - key p2 = newline.
826: } elsif ($command eq "delete") {
827: $editor->DeleteLine($p1); # p1 - key p2 null.
828: } else { # Should not get here!!!
829: die "Invalid command given to ApplyEdit $command"
830: }
831: }
832: #
833: # AdjustOurHost:
834: # Adjusts a host file stored in a configuration file editor object
835: # for the true IP address of this host. This is necessary for hosts
836: # that live behind a firewall.
837: # Those hosts have a publicly distributed IP of the firewall, but
838: # internally must use their actual IP. We assume that a given
839: # host only has a single IP interface for now.
840: # Formal Parameters:
841: # editor - The configuration file editor to adjust. This
842: # editor is assumed to contain a hosts.tab file.
843: # Strategy:
844: # - Figure out our hostname.
845: # - Lookup the entry for this host.
846: # - Modify the line to contain our IP
847: # - Do a replace for this host.
848: sub AdjustOurHost {
849: my $editor = shift;
850:
851: # figure out who I am.
852:
853: my $myHostName = $perlvar{'lonHostID'}; # LonCAPA hostname.
854:
855: # Get my host file entry.
856:
857: my $ConfigLine = $editor->Find($myHostName);
858: if(! (defined $ConfigLine)) {
859: die "AdjustOurHost - no entry for me in hosts file $myHostName";
860: }
861: # figure out my IP:
862: # Use the config line to get my hostname.
863: # Use gethostbyname to translate that into an IP address.
864: #
865: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);
866: my $BinaryIp = gethostbyname($name);
867: my $ip = inet_ntoa($ip);
868: #
869: # Reassemble the config line from the elements in the list.
870: # Note that if the loncnew items were not present before, they will
871: # be now even if they would be empty
872: #
873: my $newConfigLine = $id;
874: foreach my $item ($domain, $role, $name, $ip, $maxcon, $idleto, $mincon) {
875: $newConfigLine .= ":".$item;
876: }
877: # Replace the line:
878:
879: $editor->ReplaceLine($id, $newConfigLine);
880:
881: }
882: #
883: # ReplaceConfigFile:
884: # Replaces a configuration file with the contents of a
885: # configuration file editor object.
886: # This is done by:
887: # - Copying the target file to <filename>.old
888: # - Writing the new file to <filename>.tmp
889: # - Moving <filename.tmp> -> <filename>
890: # This laborious process ensures that the system is never without
891: # a configuration file that's at least valid (even if the contents
892: # may be dated).
893: # Parameters:
894: # filename - Name of the file to modify... this is a full path.
895: # editor - Editor containing the file.
896: #
897: sub ReplaceConfigFile {
1.192 foxr 898:
899: my ($filename, $editor) = @_;
1.168 foxr 900:
1.169 foxr 901: CopyFile ($filename, $filename.".old");
902:
903: my $contents = $editor->Get(); # Get the contents of the file.
904:
905: InstallFile($filename, $contents);
906: }
1.168 foxr 907: #
908: #
909: # Called to edit a configuration table file
1.167 foxr 910: # Parameters:
911: # request - The entire command/request sent by lonc or lonManage
912: # Return:
913: # The reply to send to the client.
1.168 foxr 914: #
1.167 foxr 915: sub EditFile {
916: my $request = shift;
917:
918: # Split the command into it's pieces: edit:filetype:script
919:
1.168 foxr 920: my ($request, $filetype, $script) = split(/:/, $request,3); # : in script
1.167 foxr 921:
922: # Check the pre-coditions for success:
923:
924: if($request != "edit") { # Something is amiss afoot alack.
925: return "error:edit request detected, but request != 'edit'\n";
926: }
927: if( ($filetype ne "hosts") &&
928: ($filetype ne "domain")) {
929: return "error:edit requested with invalid file specifier: $filetype \n";
930: }
931:
932: # Split the edit script and check it's validity.
1.168 foxr 933:
934: my @scriptlines = split(/\n/, $script); # one line per element.
935: my $linecount = scalar(@scriptlines);
936: for(my $i = 0; $i < $linecount; $i++) {
937: chomp($scriptlines[$i]);
938: if(!isValidEditCommand($scriptlines[$i])) {
939: return "error:edit with bad script line: '$scriptlines[$i]' \n";
940: }
941: }
1.145 foxr 942:
1.167 foxr 943: # Execute the edit operation.
1.169 foxr 944: # - Create a config file editor for the appropriate file and
945: # - execute each command in the script:
946: #
947: my $configfile = ConfigFileFromSelector($filetype);
948: if (!(defined $configfile)) {
949: return "refused\n";
950: }
951: my $editor = ConfigFileEdit->new($configfile);
1.167 foxr 952:
1.169 foxr 953: for (my $i = 0; $i < $linecount; $i++) {
954: ApplyEdit($scriptlines[$i], $editor);
955: }
956: # If the file is the host file, ensure that our host is
957: # adjusted to have our ip:
958: #
959: if($filetype eq "host") {
960: AdjustOurHost($editor);
961: }
962: # Finally replace the current file with our file.
963: #
964: ReplaceConfigFile($configfile, $editor);
1.167 foxr 965:
966: return "ok\n";
967: }
1.207 foxr 968:
969: #---------------------------------------------------------------
970: #
971: # Manipulation of hash based databases (factoring out common code
972: # for later use as we refactor.
973: #
974: # Ties a domain level resource file to a hash.
975: # If requested a history entry is created in the associated hist file.
976: #
977: # Parameters:
978: # domain - Name of the domain in which the resource file lives.
979: # namespace - Name of the hash within that domain.
980: # how - How to tie the hash (e.g. GDBM_WRCREAT()).
981: # loghead - Optional parameter, if present a log entry is created
982: # in the associated history file and this is the first part
983: # of that entry.
984: # logtail - Goes along with loghead, The actual logentry is of the
985: # form $loghead:<timestamp>:logtail.
986: # Returns:
987: # Reference to a hash bound to the db file or alternatively undef
988: # if the tie failed.
989: #
1.209 albertel 990: sub tie_domain_hash {
1.210 albertel 991: my ($domain,$namespace,$how,$loghead,$logtail) = @_;
1.207 foxr 992:
993: # Filter out any whitespace in the domain name:
994:
995: $domain =~ s/\W//g;
996:
997: # We have enough to go on to tie the hash:
998:
999: my $user_top_dir = $perlvar{'lonUsersDir'};
1000: my $domain_dir = $user_top_dir."/$domain";
1001: my $resource_file = $domain_dir."/$namespace.db";
1002: my %hash;
1003: if(tie(%hash, 'GDBM_File', $resource_file, $how, 0640)) {
1.211 albertel 1004: if (defined($loghead)) { # Need to log the operation.
1.210 albertel 1005: my $logFh = IO::File->new(">>$domain_dir/$namespace.hist");
1.207 foxr 1006: if($logFh) {
1007: my $timestamp = time;
1008: print $logFh "$loghead:$timestamp:$logtail\n";
1009: }
1.210 albertel 1010: $logFh->close;
1.207 foxr 1011: }
1012: return \%hash; # Return the tied hash.
1.210 albertel 1013: } else {
1.207 foxr 1014: return undef; # Tie failed.
1015: }
1016: }
1017:
1018: #
1019: # Ties a user's resource file to a hash.
1020: # If necessary, an appropriate history
1021: # log file entry is made as well.
1022: # This sub factors out common code from the subs that manipulate
1023: # the various gdbm files that keep keyword value pairs.
1024: # Parameters:
1025: # domain - Name of the domain the user is in.
1026: # user - Name of the 'current user'.
1027: # namespace - Namespace representing the file to tie.
1028: # how - What the tie is done to (e.g. GDBM_WRCREAT().
1029: # loghead - Optional first part of log entry if there may be a
1030: # history file.
1031: # what - Optional tail of log entry if there may be a history
1032: # file.
1033: # Returns:
1034: # hash to which the database is tied. It's up to the caller to untie.
1035: # undef if the has could not be tied.
1036: #
1.210 albertel 1037: sub tie_user_hash {
1038: my ($domain,$user,$namespace,$how,$loghead,$what) = @_;
1.207 foxr 1039:
1040: $namespace=~s/\//\_/g; # / -> _
1041: $namespace=~s/\W//g; # whitespace eliminated.
1042: my $proname = propath($domain, $user);
1043:
1044: # Tie the database.
1045:
1046: my %hash;
1047: if(tie(%hash, 'GDBM_File', "$proname/$namespace.db",
1048: $how, 0640)) {
1.209 albertel 1049: # If this is a namespace for which a history is kept,
1050: # make the history log entry:
1.252 albertel 1051: if (($namespace !~/^nohist\_/) && (defined($loghead))) {
1.209 albertel 1052: my $args = scalar @_;
1053: Debug(" Opening history: $namespace $args");
1054: my $hfh = IO::File->new(">>$proname/$namespace.hist");
1055: if($hfh) {
1056: my $now = time;
1057: print $hfh "$loghead:$now:$what\n";
1058: }
1.210 albertel 1059: $hfh->close;
1.209 albertel 1060: }
1.207 foxr 1061: return \%hash;
1.209 albertel 1062: } else {
1.207 foxr 1063: return undef;
1064: }
1065:
1066: }
1.214 foxr 1067:
1.255 foxr 1068: # read_profile
1069: #
1070: # Returns a set of specific entries from a user's profile file.
1071: # this is a utility function that is used by both get_profile_entry and
1072: # get_profile_entry_encrypted.
1073: #
1074: # Parameters:
1075: # udom - Domain in which the user exists.
1076: # uname - User's account name (loncapa account)
1077: # namespace - The profile namespace to open.
1078: # what - A set of & separated queries.
1079: # Returns:
1080: # If all ok: - The string that needs to be shipped back to the user.
1081: # If failure - A string that starts with error: followed by the failure
1082: # reason.. note that this probabyl gets shipped back to the
1083: # user as well.
1084: #
1085: sub read_profile {
1086: my ($udom, $uname, $namespace, $what) = @_;
1087:
1088: my $hashref = &tie_user_hash($udom, $uname, $namespace,
1089: &GDBM_READER());
1090: if ($hashref) {
1091: my @queries=split(/\&/,$what);
1092: my $qresult='';
1093:
1094: for (my $i=0;$i<=$#queries;$i++) {
1095: $qresult.="$hashref->{$queries[$i]}&"; # Presumably failure gives empty string.
1096: }
1097: $qresult=~s/\&$//; # Remove trailing & from last lookup.
1098: if (untie %$hashref) {
1099: return $qresult;
1100: } else {
1101: return "error: ".($!+0)." untie (GDBM) Failed";
1102: }
1103: } else {
1104: if ($!+0 == 2) {
1105: return "error:No such file or GDBM reported bad block error";
1106: } else {
1107: return "error: ".($!+0)." tie (GDBM) Failed";
1108: }
1109: }
1110:
1111: }
1.214 foxr 1112: #--------------------- Request Handlers --------------------------------------------
1113: #
1.215 foxr 1114: # By convention each request handler registers itself prior to the sub
1115: # declaration:
1.214 foxr 1116: #
1117:
1.216 foxr 1118: #++
1119: #
1.214 foxr 1120: # Handles ping requests.
1121: # Parameters:
1122: # $cmd - the actual keyword that invoked us.
1123: # $tail - the tail of the request that invoked us.
1124: # $replyfd- File descriptor connected to the client
1125: # Implicit Inputs:
1126: # $currenthostid - Global variable that carries the name of the host we are
1127: # known as.
1128: # Returns:
1129: # 1 - Ok to continue processing.
1130: # 0 - Program should exit.
1131: # Side effects:
1132: # Reply information is sent to the client.
1133:
1134: sub ping_handler {
1135: my ($cmd, $tail, $client) = @_;
1136: Debug("$cmd $tail $client .. $currenthostid:");
1137:
1138: Reply( $client,"$currenthostid\n","$cmd:$tail");
1139:
1140: return 1;
1141: }
1142: ®ister_handler("ping", \&ping_handler, 0, 1, 1); # Ping unencoded, client or manager.
1143:
1.216 foxr 1144: #++
1.215 foxr 1145: #
1146: # Handles pong requests. Pong replies with our current host id, and
1147: # the results of a ping sent to us via our lonc.
1148: #
1149: # Parameters:
1150: # $cmd - the actual keyword that invoked us.
1151: # $tail - the tail of the request that invoked us.
1152: # $replyfd- File descriptor connected to the client
1153: # Implicit Inputs:
1154: # $currenthostid - Global variable that carries the name of the host we are
1155: # connected to.
1156: # Returns:
1157: # 1 - Ok to continue processing.
1158: # 0 - Program should exit.
1159: # Side effects:
1160: # Reply information is sent to the client.
1161:
1162: sub pong_handler {
1163: my ($cmd, $tail, $replyfd) = @_;
1164:
1165: my $reply=&reply("ping",$clientname);
1166: &Reply( $replyfd, "$currenthostid:$reply\n", "$cmd:$tail");
1167: return 1;
1168: }
1169: ®ister_handler("pong", \&pong_handler, 0, 1, 1); # Pong unencoded, client or manager
1170:
1.216 foxr 1171: #++
1172: # Called to establish an encrypted session key with the remote client.
1173: # Note that with secure lond, in most cases this function is never
1174: # invoked. Instead, the secure session key is established either
1175: # via a local file that's locked down tight and only lives for a short
1176: # time, or via an ssl tunnel...and is generated from a bunch-o-random
1177: # bits from /dev/urandom, rather than the predictable pattern used by
1178: # by this sub. This sub is only used in the old-style insecure
1179: # key negotiation.
1180: # Parameters:
1181: # $cmd - the actual keyword that invoked us.
1182: # $tail - the tail of the request that invoked us.
1183: # $replyfd- File descriptor connected to the client
1184: # Implicit Inputs:
1185: # $currenthostid - Global variable that carries the name of the host
1186: # known as.
1187: # $clientname - Global variable that carries the name of the hsot we're connected to.
1188: # Returns:
1189: # 1 - Ok to continue processing.
1190: # 0 - Program should exit.
1191: # Implicit Outputs:
1192: # Reply information is sent to the client.
1193: # $cipher is set with a reference to a new IDEA encryption object.
1194: #
1195: sub establish_key_handler {
1196: my ($cmd, $tail, $replyfd) = @_;
1197:
1198: my $buildkey=time.$$.int(rand 100000);
1199: $buildkey=~tr/1-6/A-F/;
1200: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
1201: my $key=$currenthostid.$clientname;
1202: $key=~tr/a-z/A-Z/;
1203: $key=~tr/G-P/0-9/;
1204: $key=~tr/Q-Z/0-9/;
1205: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
1206: $key=substr($key,0,32);
1207: my $cipherkey=pack("H32",$key);
1208: $cipher=new IDEA $cipherkey;
1209: &Reply($replyfd, "$buildkey\n", "$cmd:$tail");
1210:
1211: return 1;
1212:
1213: }
1214: ®ister_handler("ekey", \&establish_key_handler, 0, 1,1);
1215:
1.215 foxr 1216:
1.217 foxr 1217: # Handler for the load command. Returns the current system load average
1218: # to the requestor.
1219: #
1220: # Parameters:
1221: # $cmd - the actual keyword that invoked us.
1222: # $tail - the tail of the request that invoked us.
1223: # $replyfd- File descriptor connected to the client
1224: # Implicit Inputs:
1225: # $currenthostid - Global variable that carries the name of the host
1226: # known as.
1227: # $clientname - Global variable that carries the name of the hsot we're connected to.
1228: # Returns:
1229: # 1 - Ok to continue processing.
1230: # 0 - Program should exit.
1231: # Side effects:
1232: # Reply information is sent to the client.
1233: sub load_handler {
1234: my ($cmd, $tail, $replyfd) = @_;
1235:
1236: # Get the load average from /proc/loadavg and calculate it as a percentage of
1237: # the allowed load limit as set by the perl global variable lonLoadLim
1238:
1239: my $loadavg;
1240: my $loadfile=IO::File->new('/proc/loadavg');
1241:
1242: $loadavg=<$loadfile>;
1243: $loadavg =~ s/\s.*//g; # Extract the first field only.
1244:
1245: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1246:
1247: &Reply( $replyfd, "$loadpercent\n", "$cmd:$tail");
1248:
1249: return 1;
1250: }
1251: register_handler("load", \&load_handler, 0, 1, 0);
1252:
1253: #
1254: # Process the userload request. This sub returns to the client the current
1255: # user load average. It can be invoked either by clients or managers.
1256: #
1257: # Parameters:
1258: # $cmd - the actual keyword that invoked us.
1259: # $tail - the tail of the request that invoked us.
1260: # $replyfd- File descriptor connected to the client
1261: # Implicit Inputs:
1262: # $currenthostid - Global variable that carries the name of the host
1263: # known as.
1264: # $clientname - Global variable that carries the name of the hsot we're connected to.
1265: # Returns:
1266: # 1 - Ok to continue processing.
1267: # 0 - Program should exit
1268: # Implicit inputs:
1269: # whatever the userload() function requires.
1270: # Implicit outputs:
1271: # the reply is written to the client.
1272: #
1273: sub user_load_handler {
1274: my ($cmd, $tail, $replyfd) = @_;
1275:
1276: my $userloadpercent=&userload();
1277: &Reply($replyfd, "$userloadpercent\n", "$cmd:$tail");
1278:
1279: return 1;
1280: }
1281: register_handler("userload", \&user_load_handler, 0, 1, 0);
1282:
1.218 foxr 1283: # Process a request for the authorization type of a user:
1284: # (userauth).
1285: #
1286: # Parameters:
1287: # $cmd - the actual keyword that invoked us.
1288: # $tail - the tail of the request that invoked us.
1289: # $replyfd- File descriptor connected to the client
1290: # Returns:
1291: # 1 - Ok to continue processing.
1292: # 0 - Program should exit
1293: # Implicit outputs:
1294: # The user authorization type is written to the client.
1295: #
1296: sub user_authorization_type {
1297: my ($cmd, $tail, $replyfd) = @_;
1298:
1299: my $userinput = "$cmd:$tail";
1300:
1301: # Pull the domain and username out of the command tail.
1.222 foxr 1302: # and call get_auth_type to determine the authentication type.
1.218 foxr 1303:
1304: my ($udom,$uname)=split(/:/,$tail);
1.222 foxr 1305: my $result = &get_auth_type($udom, $uname);
1.218 foxr 1306: if($result eq "nouser") {
1307: &Failure( $replyfd, "unknown_user\n", $userinput);
1308: } else {
1309: #
1.222 foxr 1310: # We only want to pass the second field from get_auth_type
1.218 foxr 1311: # for ^krb.. otherwise we'll be handing out the encrypted
1312: # password for internals e.g.
1313: #
1314: my ($type,$otherinfo) = split(/:/,$result);
1315: if($type =~ /^krb/) {
1316: $type = $result;
1317: }
1.222 foxr 1318: &Reply( $replyfd, "$type:\n", $userinput);
1.218 foxr 1319: }
1320:
1321: return 1;
1322: }
1323: ®ister_handler("currentauth", \&user_authorization_type, 1, 1, 0);
1324:
1325: # Process a request by a manager to push a hosts or domain table
1326: # to us. We pick apart the command and pass it on to the subs
1327: # that already exist to do this.
1328: #
1329: # Parameters:
1330: # $cmd - the actual keyword that invoked us.
1331: # $tail - the tail of the request that invoked us.
1332: # $client - File descriptor connected to the client
1333: # Returns:
1334: # 1 - Ok to continue processing.
1335: # 0 - Program should exit
1336: # Implicit Output:
1337: # a reply is written to the client.
1338:
1339: sub push_file_handler {
1340: my ($cmd, $tail, $client) = @_;
1341:
1342: my $userinput = "$cmd:$tail";
1343:
1344: # At this time we only know that the IP of our partner is a valid manager
1345: # the code below is a hook to do further authentication (e.g. to resolve
1346: # spoofing).
1347:
1348: my $cert = &GetCertificate($userinput);
1349: if(&ValidManager($cert)) {
1350:
1351: # Now presumably we have the bona fides of both the peer host and the
1352: # process making the request.
1353:
1354: my $reply = &PushFile($userinput);
1355: &Reply($client, "$reply\n", $userinput);
1356:
1357: } else {
1358: &Failure( $client, "refused\n", $userinput);
1359: }
1.219 foxr 1360: return 1;
1.218 foxr 1361: }
1362: ®ister_handler("pushfile", \&push_file_handler, 1, 0, 1);
1363:
1.243 banghart 1364: #
1365: # du - list the disk usuage of a directory recursively.
1366: #
1367: # note: stolen code from the ls file handler
1368: # under construction by Rick Banghart
1369: # .
1370: # Parameters:
1371: # $cmd - The command that dispatched us (du).
1372: # $ududir - The directory path to list... I'm not sure what this
1373: # is relative as things like ls:. return e.g.
1374: # no_such_dir.
1375: # $client - Socket open on the client.
1376: # Returns:
1377: # 1 - indicating that the daemon should not disconnect.
1378: # Side Effects:
1379: # The reply is written to $client.
1380: #
1.244 banghart 1381:
1.243 banghart 1382: sub du_handler {
1383: my ($cmd, $ududir, $client) = @_;
1.251 foxr 1384: my ($ududir) = split(/:/,$ududir); # Make 'telnet' testing easier.
1385: my $userinput = "$cmd:$ududir";
1386:
1.245 albertel 1387: if ($ududir=~/\.\./ || $ududir!~m|^/home/httpd/|) {
1388: &Failure($client,"refused\n","$cmd:$ududir");
1389: return 1;
1390: }
1.249 foxr 1391: # Since $ududir could have some nasties in it,
1392: # we will require that ududir is a valid
1393: # directory. Just in case someone tries to
1394: # slip us a line like .;(cd /home/httpd rm -rf*)
1395: # etc.
1396: #
1397: if (-d $ududir) {
1398: # And as Shakespeare would say to make
1.251 foxr 1399: # assurance double sure,
1400: # use execute_command to ensure that the command is not executed in
1401: # a shell that can screw us up.
1402:
1403: my $duout = execute_command("du -ks $ududir");
1.249 foxr 1404: $duout=~s/[^\d]//g; #preserve only the numbers
1405: &Reply($client,"$duout\n","$cmd:$ududir");
1406: } else {
1.251 foxr 1407:
1408: &Failure($client, "bad_directory:$ududir\n","$cmd:$ududir");
1409:
1.249 foxr 1410: }
1.243 banghart 1411: return 1;
1412: }
1413: ®ister_handler("du", \&du_handler, 0, 1, 0);
1.218 foxr 1414:
1415:
1.239 foxr 1416: #
1417: # ls - list the contents of a directory. For each file in the
1418: # selected directory the filename followed by the full output of
1419: # the stat function is returned. The returned info for each
1420: # file are separated by ':'. The stat fields are separated by &'s.
1421: # Parameters:
1422: # $cmd - The command that dispatched us (ls).
1423: # $ulsdir - The directory path to list... I'm not sure what this
1424: # is relative as things like ls:. return e.g.
1425: # no_such_dir.
1426: # $client - Socket open on the client.
1427: # Returns:
1428: # 1 - indicating that the daemon should not disconnect.
1429: # Side Effects:
1430: # The reply is written to $client.
1431: #
1432: sub ls_handler {
1433: my ($cmd, $ulsdir, $client) = @_;
1434:
1435: my $userinput = "$cmd:$ulsdir";
1436:
1437: my $obs;
1438: my $rights;
1439: my $ulsout='';
1440: my $ulsfn;
1441: if (-e $ulsdir) {
1442: if(-d $ulsdir) {
1443: if (opendir(LSDIR,$ulsdir)) {
1444: while ($ulsfn=readdir(LSDIR)) {
1445: undef $obs, $rights;
1446: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1447: #We do some obsolete checking here
1448: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1449: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1450: my @obsolete=<FILE>;
1451: foreach my $obsolete (@obsolete) {
1452: if($obsolete =~ m|(<obsolete>)(on)|) { $obs = 1; }
1453: if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
1454: }
1455: }
1456: $ulsout.=$ulsfn.'&'.join('&',@ulsstats);
1457: if($obs eq '1') { $ulsout.="&1"; }
1458: else { $ulsout.="&0"; }
1459: if($rights eq '1') { $ulsout.="&1:"; }
1460: else { $ulsout.="&0:"; }
1461: }
1462: closedir(LSDIR);
1463: }
1464: } else {
1465: my @ulsstats=stat($ulsdir);
1466: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1467: }
1468: } else {
1469: $ulsout='no_such_dir';
1470: }
1471: if ($ulsout eq '') { $ulsout='empty'; }
1.249 foxr 1472: &Reply($client, "$ulsout\n", $userinput); # This supports debug logging.
1.239 foxr 1473:
1474: return 1;
1475:
1476: }
1477: ®ister_handler("ls", \&ls_handler, 0, 1, 0);
1478:
1.238 foxr 1479:
1.243 banghart 1480:
1481:
1.218 foxr 1482: # Process a reinit request. Reinit requests that either
1483: # lonc or lond be reinitialized so that an updated
1484: # host.tab or domain.tab can be processed.
1485: #
1486: # Parameters:
1487: # $cmd - the actual keyword that invoked us.
1488: # $tail - the tail of the request that invoked us.
1489: # $client - File descriptor connected to the client
1490: # Returns:
1491: # 1 - Ok to continue processing.
1492: # 0 - Program should exit
1493: # Implicit output:
1494: # a reply is sent to the client.
1495: #
1496: sub reinit_process_handler {
1497: my ($cmd, $tail, $client) = @_;
1498:
1499: my $userinput = "$cmd:$tail";
1500:
1501: my $cert = &GetCertificate($userinput);
1502: if(&ValidManager($cert)) {
1503: chomp($userinput);
1504: my $reply = &ReinitProcess($userinput);
1505: &Reply( $client, "$reply\n", $userinput);
1506: } else {
1507: &Failure( $client, "refused\n", $userinput);
1508: }
1509: return 1;
1510: }
1511:
1512: ®ister_handler("reinit", \&reinit_process_handler, 1, 0, 1);
1513:
1514: # Process the editing script for a table edit operation.
1515: # the editing operation must be encrypted and requested by
1516: # a manager host.
1517: #
1518: # Parameters:
1519: # $cmd - the actual keyword that invoked us.
1520: # $tail - the tail of the request that invoked us.
1521: # $client - File descriptor connected to the client
1522: # Returns:
1523: # 1 - Ok to continue processing.
1524: # 0 - Program should exit
1525: # Implicit output:
1526: # a reply is sent to the client.
1527: #
1528: sub edit_table_handler {
1529: my ($command, $tail, $client) = @_;
1530:
1531: my $userinput = "$command:$tail";
1532:
1533: my $cert = &GetCertificate($userinput);
1534: if(&ValidManager($cert)) {
1535: my($filetype, $script) = split(/:/, $tail);
1536: if (($filetype eq "hosts") ||
1537: ($filetype eq "domain")) {
1538: if($script ne "") {
1539: &Reply($client, # BUGBUG - EditFile
1540: &EditFile($userinput), # could fail.
1541: $userinput);
1542: } else {
1543: &Failure($client,"refused\n",$userinput);
1544: }
1545: } else {
1546: &Failure($client,"refused\n",$userinput);
1547: }
1548: } else {
1549: &Failure($client,"refused\n",$userinput);
1550: }
1551: return 1;
1552: }
1553: register_handler("edit", \&edit_table_handler, 1, 0, 1);
1554:
1555:
1.220 foxr 1556: #
1557: # Authenticate a user against the LonCAPA authentication
1558: # database. Note that there are several authentication
1559: # possibilities:
1560: # - unix - The user can be authenticated against the unix
1561: # password file.
1562: # - internal - The user can be authenticated against a purely
1563: # internal per user password file.
1564: # - kerberos - The user can be authenticated against either a kerb4 or kerb5
1565: # ticket granting authority.
1566: # - user - The person tailoring LonCAPA can supply a user authentication
1567: # mechanism that is per system.
1568: #
1569: # Parameters:
1570: # $cmd - The command that got us here.
1571: # $tail - Tail of the command (remaining parameters).
1572: # $client - File descriptor connected to client.
1573: # Returns
1574: # 0 - Requested to exit, caller should shut down.
1575: # 1 - Continue processing.
1576: # Implicit inputs:
1577: # The authentication systems describe above have their own forms of implicit
1578: # input into the authentication process that are described above.
1579: #
1580: sub authenticate_handler {
1581: my ($cmd, $tail, $client) = @_;
1582:
1583:
1584: # Regenerate the full input line
1585:
1586: my $userinput = $cmd.":".$tail;
1587:
1588: # udom - User's domain.
1589: # uname - Username.
1590: # upass - User's password.
1591:
1592: my ($udom,$uname,$upass)=split(/:/,$tail);
1593: &Debug(" Authenticate domain = $udom, user = $uname, password = $upass");
1594: chomp($upass);
1595: $upass=&unescape($upass);
1596:
1597: my $pwdcorrect = &validate_user($udom, $uname, $upass);
1598: if($pwdcorrect) {
1599: &Reply( $client, "authorized\n", $userinput);
1600: #
1601: # Bad credentials: Failed to authorize
1602: #
1603: } else {
1604: &Failure( $client, "non_authorized\n", $userinput);
1605: }
1606:
1607: return 1;
1608: }
1.218 foxr 1609:
1.220 foxr 1610: register_handler("auth", \&authenticate_handler, 1, 1, 0);
1.214 foxr 1611:
1.222 foxr 1612: #
1613: # Change a user's password. Note that this function is complicated by
1614: # the fact that a user may be authenticated in more than one way:
1615: # At present, we are not able to change the password for all types of
1616: # authentication methods. Only for:
1617: # unix - unix password or shadow passoword style authentication.
1618: # local - Locally written authentication mechanism.
1619: # For now, kerb4 and kerb5 password changes are not supported and result
1620: # in an error.
1621: # FUTURE WORK:
1622: # Support kerberos passwd changes?
1623: # Parameters:
1624: # $cmd - The command that got us here.
1625: # $tail - Tail of the command (remaining parameters).
1626: # $client - File descriptor connected to client.
1627: # Returns
1628: # 0 - Requested to exit, caller should shut down.
1629: # 1 - Continue processing.
1630: # Implicit inputs:
1631: # The authentication systems describe above have their own forms of implicit
1632: # input into the authentication process that are described above.
1633: sub change_password_handler {
1634: my ($cmd, $tail, $client) = @_;
1635:
1636: my $userinput = $cmd.":".$tail; # Reconstruct client's string.
1637:
1638: #
1639: # udom - user's domain.
1640: # uname - Username.
1641: # upass - Current password.
1642: # npass - New password.
1643:
1644: my ($udom,$uname,$upass,$npass)=split(/:/,$tail);
1645:
1646: $upass=&unescape($upass);
1647: $npass=&unescape($npass);
1648: &Debug("Trying to change password for $uname");
1649:
1650: # First require that the user can be authenticated with their
1651: # old password:
1652:
1653: my $validated = &validate_user($udom, $uname, $upass);
1654: if($validated) {
1655: my $realpasswd = &get_auth_type($udom, $uname); # Defined since authd.
1656:
1657: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1658: if ($howpwd eq 'internal') {
1659: &Debug("internal auth");
1660: my $salt=time;
1661: $salt=substr($salt,6,2);
1662: my $ncpass=crypt($npass,$salt);
1663: if(&rewrite_password_file($udom, $uname, "internal:$ncpass")) {
1664: &logthis("Result of password change for "
1665: ."$uname: pwchange_success");
1666: &Reply($client, "ok\n", $userinput);
1667: } else {
1668: &logthis("Unable to open $uname passwd "
1669: ."to change password");
1670: &Failure( $client, "non_authorized\n",$userinput);
1671: }
1672: } elsif ($howpwd eq 'unix') {
1673: # Unix means we have to access /etc/password
1674: &Debug("auth is unix");
1675: my $execdir=$perlvar{'lonDaemons'};
1676: &Debug("Opening lcpasswd pipeline");
1677: my $pf = IO::File->new("|$execdir/lcpasswd > "
1678: ."$perlvar{'lonDaemons'}"
1679: ."/logs/lcpasswd.log");
1680: print $pf "$uname\n$npass\n$npass\n";
1681: close $pf;
1682: my $err = $?;
1683: my $result = ($err>0 ? 'pwchange_failure' : 'ok');
1684: &logthis("Result of password change for $uname: ".
1685: &lcpasswdstrerror($?));
1686: &Reply($client, "$result\n", $userinput);
1687: } else {
1688: # this just means that the current password mode is not
1689: # one we know how to change (e.g the kerberos auth modes or
1690: # locally written auth handler).
1691: #
1692: &Failure( $client, "auth_mode_error\n", $userinput);
1693: }
1694:
1.224 foxr 1695: } else {
1.222 foxr 1696: &Failure( $client, "non_authorized\n", $userinput);
1697: }
1698:
1699: return 1;
1700: }
1701: register_handler("passwd", \&change_password_handler, 1, 1, 0);
1702:
1703:
1.225 foxr 1704: #
1705: # Create a new user. User in this case means a lon-capa user.
1706: # The user must either already exist in some authentication realm
1707: # like kerberos or the /etc/passwd. If not, a user completely local to
1708: # this loncapa system is created.
1709: #
1710: # Parameters:
1711: # $cmd - The command that got us here.
1712: # $tail - Tail of the command (remaining parameters).
1713: # $client - File descriptor connected to client.
1714: # Returns
1715: # 0 - Requested to exit, caller should shut down.
1716: # 1 - Continue processing.
1717: # Implicit inputs:
1718: # The authentication systems describe above have their own forms of implicit
1719: # input into the authentication process that are described above.
1720: sub add_user_handler {
1721:
1722: my ($cmd, $tail, $client) = @_;
1723:
1724:
1725: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
1726: my $userinput = $cmd.":".$tail; # Reconstruct the full request line.
1727:
1728: &Debug("cmd =".$cmd." $udom =".$udom." uname=".$uname);
1729:
1730:
1731: if($udom eq $currentdomainid) { # Reject new users for other domains...
1732:
1733: my $oldumask=umask(0077);
1734: chomp($npass);
1735: $npass=&unescape($npass);
1736: my $passfilename = &password_path($udom, $uname);
1737: &Debug("Password file created will be:".$passfilename);
1738: if (-e $passfilename) {
1739: &Failure( $client, "already_exists\n", $userinput);
1740: } else {
1741: my @fpparts=split(/\//,$passfilename);
1742: my $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
1743: my $fperror='';
1744: for (my $i=3;$i<= ($#fpparts-1);$i++) {
1745: $fpnow.='/'.$fpparts[$i];
1746: unless (-e $fpnow) {
1747: &logthis("mkdir $fpnow");
1748: unless (mkdir($fpnow,0777)) {
1749: $fperror="error: ".($!+0)." mkdir failed while attempting "
1750: ."makeuser";
1751: }
1752: }
1753: }
1754: unless ($fperror) {
1755: my $result=&make_passwd_file($uname, $umode,$npass, $passfilename);
1756: &Reply($client, $result, $userinput); #BUGBUG - could be fail
1757: } else {
1758: &Failure($client, "$fperror\n", $userinput);
1759: }
1760: }
1761: umask($oldumask);
1762: } else {
1763: &Failure($client, "not_right_domain\n",
1764: $userinput); # Even if we are multihomed.
1765:
1766: }
1767: return 1;
1768:
1769: }
1770: ®ister_handler("makeuser", \&add_user_handler, 1, 1, 0);
1771:
1772: #
1773: # Change the authentication method of a user. Note that this may
1774: # also implicitly change the user's password if, for example, the user is
1775: # joining an existing authentication realm. Known authentication realms at
1776: # this time are:
1777: # internal - Purely internal password file (only loncapa knows this user)
1778: # local - Institutionally written authentication module.
1779: # unix - Unix user (/etc/passwd with or without /etc/shadow).
1780: # kerb4 - kerberos version 4
1781: # kerb5 - kerberos version 5
1782: #
1783: # Parameters:
1784: # $cmd - The command that got us here.
1785: # $tail - Tail of the command (remaining parameters).
1786: # $client - File descriptor connected to client.
1787: # Returns
1788: # 0 - Requested to exit, caller should shut down.
1789: # 1 - Continue processing.
1790: # Implicit inputs:
1791: # The authentication systems describe above have their own forms of implicit
1792: # input into the authentication process that are described above.
1793: #
1794: sub change_authentication_handler {
1795:
1796: my ($cmd, $tail, $client) = @_;
1797:
1798: my $userinput = "$cmd:$tail"; # Reconstruct user input.
1799:
1800: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
1801: &Debug("cmd = ".$cmd." domain= ".$udom."uname =".$uname." umode= ".$umode);
1802: if ($udom ne $currentdomainid) {
1803: &Failure( $client, "not_right_domain\n", $client);
1804: } else {
1805:
1806: chomp($npass);
1807:
1808: $npass=&unescape($npass);
1809: my $passfilename = &password_path($udom, $uname);
1810: if ($passfilename) { # Not allowed to create a new user!!
1811: my $result=&make_passwd_file($uname, $umode,$npass,$passfilename);
1812: &Reply($client, $result, $userinput);
1813: } else {
1.251 foxr 1814: &Failure($client, "non_authorized\n", $userinput); # Fail the user now.
1.225 foxr 1815: }
1816: }
1817: return 1;
1818: }
1819: ®ister_handler("changeuserauth", \&change_authentication_handler, 1,1, 0);
1820:
1821: #
1822: # Determines if this is the home server for a user. The home server
1823: # for a user will have his/her lon-capa passwd file. Therefore all we need
1824: # to do is determine if this file exists.
1825: #
1826: # Parameters:
1827: # $cmd - The command that got us here.
1828: # $tail - Tail of the command (remaining parameters).
1829: # $client - File descriptor connected to client.
1830: # Returns
1831: # 0 - Requested to exit, caller should shut down.
1832: # 1 - Continue processing.
1833: # Implicit inputs:
1834: # The authentication systems describe above have their own forms of implicit
1835: # input into the authentication process that are described above.
1836: #
1837: sub is_home_handler {
1838: my ($cmd, $tail, $client) = @_;
1839:
1840: my $userinput = "$cmd:$tail";
1841:
1842: my ($udom,$uname)=split(/:/,$tail);
1843: chomp($uname);
1844: my $passfile = &password_filename($udom, $uname);
1845: if($passfile) {
1846: &Reply( $client, "found\n", $userinput);
1847: } else {
1848: &Failure($client, "not_found\n", $userinput);
1849: }
1850: return 1;
1851: }
1852: ®ister_handler("home", \&is_home_handler, 0,1,0);
1853:
1854: #
1855: # Process an update request for a resource?? I think what's going on here is
1856: # that a resource has been modified that we hold a subscription to.
1857: # If the resource is not local, then we must update, or at least invalidate our
1858: # cached copy of the resource.
1859: # FUTURE WORK:
1860: # I need to look at this logic carefully. My druthers would be to follow
1861: # typical caching logic, and simple invalidate the cache, drop any subscription
1862: # an let the next fetch start the ball rolling again... however that may
1863: # actually be more difficult than it looks given the complex web of
1864: # proxy servers.
1865: # Parameters:
1866: # $cmd - The command that got us here.
1867: # $tail - Tail of the command (remaining parameters).
1868: # $client - File descriptor connected to client.
1869: # Returns
1870: # 0 - Requested to exit, caller should shut down.
1871: # 1 - Continue processing.
1872: # Implicit inputs:
1873: # The authentication systems describe above have their own forms of implicit
1874: # input into the authentication process that are described above.
1875: #
1876: sub update_resource_handler {
1877:
1878: my ($cmd, $tail, $client) = @_;
1879:
1880: my $userinput = "$cmd:$tail";
1881:
1882: my $fname= $tail; # This allows interactive testing
1883:
1884:
1885: my $ownership=ishome($fname);
1886: if ($ownership eq 'not_owner') {
1887: if (-e $fname) {
1888: my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
1889: $atime,$mtime,$ctime,$blksize,$blocks)=stat($fname);
1890: my $now=time;
1891: my $since=$now-$atime;
1892: if ($since>$perlvar{'lonExpire'}) {
1893: my $reply=&reply("unsub:$fname","$clientname");
1894: unlink("$fname");
1895: } else {
1896: my $transname="$fname.in.transfer";
1897: my $remoteurl=&reply("sub:$fname","$clientname");
1898: my $response;
1899: alarm(120);
1900: {
1901: my $ua=new LWP::UserAgent;
1902: my $request=new HTTP::Request('GET',"$remoteurl");
1903: $response=$ua->request($request,$transname);
1904: }
1905: alarm(0);
1906: if ($response->is_error()) {
1907: unlink($transname);
1908: my $message=$response->status_line;
1909: &logthis("LWP GET: $message for $fname ($remoteurl)");
1910: } else {
1911: if ($remoteurl!~/\.meta$/) {
1912: alarm(120);
1913: {
1914: my $ua=new LWP::UserAgent;
1915: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1916: my $mresponse=$ua->request($mrequest,$fname.'.meta');
1917: if ($mresponse->is_error()) {
1918: unlink($fname.'.meta');
1919: }
1920: }
1921: alarm(0);
1922: }
1923: rename($transname,$fname);
1924: }
1925: }
1926: &Reply( $client, "ok\n", $userinput);
1927: } else {
1928: &Failure($client, "not_found\n", $userinput);
1929: }
1930: } else {
1931: &Failure($client, "rejected\n", $userinput);
1932: }
1933: return 1;
1934: }
1935: ®ister_handler("update", \&update_resource_handler, 0 ,1, 0);
1936:
1937: #
1.226 foxr 1938: # Fetch a user file from a remote server to the user's home directory
1939: # userfiles subdir.
1.225 foxr 1940: # Parameters:
1941: # $cmd - The command that got us here.
1942: # $tail - Tail of the command (remaining parameters).
1943: # $client - File descriptor connected to client.
1944: # Returns
1945: # 0 - Requested to exit, caller should shut down.
1946: # 1 - Continue processing.
1947: #
1948: sub fetch_user_file_handler {
1949:
1950: my ($cmd, $tail, $client) = @_;
1951:
1952: my $userinput = "$cmd:$tail";
1953: my $fname = $tail;
1.232 foxr 1954: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
1.225 foxr 1955: my $udir=&propath($udom,$uname).'/userfiles';
1956: unless (-e $udir) {
1957: mkdir($udir,0770);
1958: }
1.232 foxr 1959: Debug("fetch user file for $fname");
1.225 foxr 1960: if (-e $udir) {
1961: $ufile=~s/^[\.\~]+//;
1.232 foxr 1962:
1963: # IF necessary, create the path right down to the file.
1964: # Note that any regular files in the way of this path are
1965: # wiped out to deal with some earlier folly of mine.
1966:
1967: my $path = $udir;
1968: if ($ufile =~m|(.+)/([^/]+)$|) {
1969: my @parts=split('/',$1);
1970: foreach my $part (@parts) {
1971: $path .= '/'.$part;
1972: if( -f $path) {
1973: unlink($path);
1974: }
1975: if ((-e $path)!=1) {
1976: mkdir($path,0770);
1977: }
1978: }
1979: }
1980:
1981:
1.225 foxr 1982: my $destname=$udir.'/'.$ufile;
1983: my $transname=$udir.'/'.$ufile.'.in.transit';
1984: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
1985: my $response;
1.232 foxr 1986: Debug("Remote URL : $remoteurl Transfername $transname Destname: $destname");
1.225 foxr 1987: alarm(120);
1988: {
1989: my $ua=new LWP::UserAgent;
1990: my $request=new HTTP::Request('GET',"$remoteurl");
1991: $response=$ua->request($request,$transname);
1992: }
1993: alarm(0);
1994: if ($response->is_error()) {
1995: unlink($transname);
1996: my $message=$response->status_line;
1997: &logthis("LWP GET: $message for $fname ($remoteurl)");
1998: &Failure($client, "failed\n", $userinput);
1999: } else {
1.232 foxr 2000: Debug("Renaming $transname to $destname");
1.225 foxr 2001: if (!rename($transname,$destname)) {
2002: &logthis("Unable to move $transname to $destname");
2003: unlink($transname);
2004: &Failure($client, "failed\n", $userinput);
2005: } else {
2006: &Reply($client, "ok\n", $userinput);
2007: }
2008: }
2009: } else {
2010: &Failure($client, "not_home\n", $userinput);
2011: }
2012: return 1;
2013: }
2014: ®ister_handler("fetchuserfile", \&fetch_user_file_handler, 0, 1, 0);
2015:
1.226 foxr 2016: #
2017: # Remove a file from a user's home directory userfiles subdirectory.
2018: # Parameters:
2019: # cmd - the Lond request keyword that got us here.
2020: # tail - the part of the command past the keyword.
2021: # client- File descriptor connected with the client.
2022: #
2023: # Returns:
2024: # 1 - Continue processing.
2025:
2026: sub remove_user_file_handler {
2027: my ($cmd, $tail, $client) = @_;
2028:
2029: my ($fname) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2030:
2031: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
2032: if ($ufile =~m|/\.\./|) {
2033: # any files paths with /../ in them refuse
2034: # to deal with
2035: &Failure($client, "refused\n", "$cmd:$tail");
2036: } else {
2037: my $udir = &propath($udom,$uname);
2038: if (-e $udir) {
2039: my $file=$udir.'/userfiles/'.$ufile;
2040: if (-e $file) {
1.253 foxr 2041: #
2042: # If the file is a regular file unlink is fine...
2043: # However it's possible the client wants a dir.
2044: # removed, in which case rmdir is more approprate:
2045: #
1.240 banghart 2046: if (-f $file){
1.241 albertel 2047: unlink($file);
2048: } elsif(-d $file) {
2049: rmdir($file);
1.240 banghart 2050: }
1.226 foxr 2051: if (-e $file) {
1.253 foxr 2052: # File is still there after we deleted it ?!?
2053:
1.226 foxr 2054: &Failure($client, "failed\n", "$cmd:$tail");
2055: } else {
2056: &Reply($client, "ok\n", "$cmd:$tail");
2057: }
2058: } else {
2059: &Failure($client, "not_found\n", "$cmd:$tail");
2060: }
2061: } else {
2062: &Failure($client, "not_home\n", "$cmd:$tail");
2063: }
2064: }
2065: return 1;
2066: }
2067: ®ister_handler("removeuserfile", \&remove_user_file_handler, 0,1,0);
2068:
1.236 albertel 2069: #
2070: # make a directory in a user's home directory userfiles subdirectory.
2071: # Parameters:
2072: # cmd - the Lond request keyword that got us here.
2073: # tail - the part of the command past the keyword.
2074: # client- File descriptor connected with the client.
2075: #
2076: # Returns:
2077: # 1 - Continue processing.
2078:
2079: sub mkdir_user_file_handler {
2080: my ($cmd, $tail, $client) = @_;
2081:
2082: my ($dir) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2083: $dir=&unescape($dir);
2084: my ($udom,$uname,$ufile) = ($dir =~ m|^([^/]+)/([^/]+)/(.+)$|);
2085: if ($ufile =~m|/\.\./|) {
2086: # any files paths with /../ in them refuse
2087: # to deal with
2088: &Failure($client, "refused\n", "$cmd:$tail");
2089: } else {
2090: my $udir = &propath($udom,$uname);
2091: if (-e $udir) {
2092: my $newdir=$udir.'/userfiles/'.$ufile;
2093: if (!-e $newdir) {
1.257 raeburn 2094: my @parts=split('/',$newdir);
2095: my $path;
2096: foreach my $part (@parts) {
2097: $path .= '/'.$part;
2098: if (!-e $path) {
2099: mkdir($path,0770);
2100: }
2101: }
1.236 albertel 2102: if (!-e $newdir) {
2103: &Failure($client, "failed\n", "$cmd:$tail");
2104: } else {
2105: &Reply($client, "ok\n", "$cmd:$tail");
2106: }
2107: } else {
2108: &Failure($client, "not_found\n", "$cmd:$tail");
2109: }
2110: } else {
2111: &Failure($client, "not_home\n", "$cmd:$tail");
2112: }
2113: }
2114: return 1;
2115: }
2116: ®ister_handler("mkdiruserfile", \&mkdir_user_file_handler, 0,1,0);
2117:
1.237 albertel 2118: #
2119: # rename a file in a user's home directory userfiles subdirectory.
2120: # Parameters:
2121: # cmd - the Lond request keyword that got us here.
2122: # tail - the part of the command past the keyword.
2123: # client- File descriptor connected with the client.
2124: #
2125: # Returns:
2126: # 1 - Continue processing.
2127:
2128: sub rename_user_file_handler {
2129: my ($cmd, $tail, $client) = @_;
2130:
2131: my ($udom,$uname,$old,$new) = split(/:/, $tail);
2132: $old=&unescape($old);
2133: $new=&unescape($new);
2134: if ($new =~m|/\.\./| || $old =~m|/\.\./|) {
2135: # any files paths with /../ in them refuse to deal with
2136: &Failure($client, "refused\n", "$cmd:$tail");
2137: } else {
2138: my $udir = &propath($udom,$uname);
2139: if (-e $udir) {
2140: my $oldfile=$udir.'/userfiles/'.$old;
2141: my $newfile=$udir.'/userfiles/'.$new;
2142: if (-e $newfile) {
2143: &Failure($client, "exists\n", "$cmd:$tail");
2144: } elsif (! -e $oldfile) {
2145: &Failure($client, "not_found\n", "$cmd:$tail");
2146: } else {
2147: if (!rename($oldfile,$newfile)) {
2148: &Failure($client, "failed\n", "$cmd:$tail");
2149: } else {
2150: &Reply($client, "ok\n", "$cmd:$tail");
2151: }
2152: }
2153: } else {
2154: &Failure($client, "not_home\n", "$cmd:$tail");
2155: }
2156: }
2157: return 1;
2158: }
2159: ®ister_handler("renameuserfile", \&rename_user_file_handler, 0,1,0);
2160:
1.227 foxr 2161:
2162: #
2163: # Authenticate access to a user file by checking the user's
2164: # session token(?)
2165: #
2166: # Parameters:
2167: # cmd - The request keyword that dispatched to tus.
2168: # tail - The tail of the request (colon separated parameters).
2169: # client - Filehandle open on the client.
2170: # Return:
2171: # 1.
2172:
2173: sub token_auth_user_file_handler {
2174: my ($cmd, $tail, $client) = @_;
2175:
2176: my ($fname, $session) = split(/:/, $tail);
2177:
2178: chomp($session);
1.251 foxr 2179: my $reply="non_auth\n";
1.227 foxr 2180: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
2181: $session.'.id')) {
2182: while (my $line=<ENVIN>) {
1.251 foxr 2183: if ($line=~ m|userfile\.\Q$fname\E\=|) { $reply="ok\n"; }
1.227 foxr 2184: }
2185: close(ENVIN);
1.251 foxr 2186: &Reply($client, $reply, "$cmd:$tail");
1.227 foxr 2187: } else {
2188: &Failure($client, "invalid_token\n", "$cmd:$tail");
2189: }
2190: return 1;
2191:
2192: }
2193:
2194: ®ister_handler("tokenauthuserfile", \&token_auth_user_file_handler, 0,1,0);
1.229 foxr 2195:
2196:
2197: #
2198: # Unsubscribe from a resource.
2199: #
2200: # Parameters:
2201: # $cmd - The command that got us here.
2202: # $tail - Tail of the command (remaining parameters).
2203: # $client - File descriptor connected to client.
2204: # Returns
2205: # 0 - Requested to exit, caller should shut down.
2206: # 1 - Continue processing.
2207: #
2208: sub unsubscribe_handler {
2209: my ($cmd, $tail, $client) = @_;
2210:
2211: my $userinput= "$cmd:$tail";
2212:
2213: my ($fname) = split(/:/,$tail); # Split in case there's extrs.
2214:
2215: &Debug("Unsubscribing $fname");
2216: if (-e $fname) {
2217: &Debug("Exists");
2218: &Reply($client, &unsub($fname,$clientip), $userinput);
2219: } else {
2220: &Failure($client, "not_found\n", $userinput);
2221: }
2222: return 1;
2223: }
2224: ®ister_handler("unsub", \&unsubscribe_handler, 0, 1, 0);
1.230 foxr 2225: # Subscribe to a resource
2226: #
2227: # Parameters:
2228: # $cmd - The command that got us here.
2229: # $tail - Tail of the command (remaining parameters).
2230: # $client - File descriptor connected to client.
2231: # Returns
2232: # 0 - Requested to exit, caller should shut down.
2233: # 1 - Continue processing.
2234: #
2235: sub subscribe_handler {
2236: my ($cmd, $tail, $client)= @_;
2237:
2238: my $userinput = "$cmd:$tail";
2239:
2240: &Reply( $client, &subscribe($userinput,$clientip), $userinput);
2241:
2242: return 1;
2243: }
2244: ®ister_handler("sub", \&subscribe_handler, 0, 1, 0);
2245:
2246: #
2247: # Determine the version of a resource (?) Or is it return
2248: # the top version of the resource? Not yet clear from the
2249: # code in currentversion.
2250: #
2251: # Parameters:
2252: # $cmd - The command that got us here.
2253: # $tail - Tail of the command (remaining parameters).
2254: # $client - File descriptor connected to client.
2255: # Returns
2256: # 0 - Requested to exit, caller should shut down.
2257: # 1 - Continue processing.
2258: #
2259: sub current_version_handler {
2260: my ($cmd, $tail, $client) = @_;
2261:
2262: my $userinput= "$cmd:$tail";
2263:
2264: my $fname = $tail;
2265: &Reply( $client, ¤tversion($fname)."\n", $userinput);
2266: return 1;
2267:
2268: }
2269: ®ister_handler("currentversion", \¤t_version_handler, 0, 1, 0);
2270:
2271: # Make an entry in a user's activity log.
2272: #
2273: # Parameters:
2274: # $cmd - The command that got us here.
2275: # $tail - Tail of the command (remaining parameters).
2276: # $client - File descriptor connected to client.
2277: # Returns
2278: # 0 - Requested to exit, caller should shut down.
2279: # 1 - Continue processing.
2280: #
2281: sub activity_log_handler {
2282: my ($cmd, $tail, $client) = @_;
2283:
2284:
2285: my $userinput= "$cmd:$tail";
2286:
2287: my ($udom,$uname,$what)=split(/:/,$tail);
2288: chomp($what);
2289: my $proname=&propath($udom,$uname);
2290: my $now=time;
2291: my $hfh;
2292: if ($hfh=IO::File->new(">>$proname/activity.log")) {
2293: print $hfh "$now:$clientname:$what\n";
2294: &Reply( $client, "ok\n", $userinput);
2295: } else {
2296: &Failure($client, "error: ".($!+0)." IO::File->new Failed "
2297: ."while attempting log\n",
2298: $userinput);
2299: }
2300:
2301: return 1;
2302: }
2303: register_handler("log", \&activity_log_handler, 0, 1, 0);
2304:
2305: #
2306: # Put a namespace entry in a user profile hash.
2307: # My druthers would be for this to be an encrypted interaction too.
2308: # anything that might be an inadvertent covert channel about either
2309: # user authentication or user personal information....
2310: #
2311: # Parameters:
2312: # $cmd - The command that got us here.
2313: # $tail - Tail of the command (remaining parameters).
2314: # $client - File descriptor connected to client.
2315: # Returns
2316: # 0 - Requested to exit, caller should shut down.
2317: # 1 - Continue processing.
2318: #
2319: sub put_user_profile_entry {
2320: my ($cmd, $tail, $client) = @_;
1.229 foxr 2321:
1.230 foxr 2322: my $userinput = "$cmd:$tail";
2323:
1.242 raeburn 2324: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
1.230 foxr 2325: if ($namespace ne 'roles') {
2326: chomp($what);
2327: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2328: &GDBM_WRCREAT(),"P",$what);
2329: if($hashref) {
2330: my @pairs=split(/\&/,$what);
2331: foreach my $pair (@pairs) {
2332: my ($key,$value)=split(/=/,$pair);
2333: $hashref->{$key}=$value;
2334: }
2335: if (untie(%$hashref)) {
2336: &Reply( $client, "ok\n", $userinput);
2337: } else {
2338: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2339: "while attempting put\n",
2340: $userinput);
2341: }
2342: } else {
2343: &Failure( $client, "error: ".($!)." tie(GDBM) Failed ".
2344: "while attempting put\n", $userinput);
2345: }
2346: } else {
2347: &Failure( $client, "refused\n", $userinput);
2348: }
2349:
2350: return 1;
2351: }
2352: ®ister_handler("put", \&put_user_profile_entry, 0, 1, 0);
2353:
2354: #
2355: # Increment a profile entry in the user history file.
2356: # The history contains keyword value pairs. In this case,
2357: # The value itself is a pair of numbers. The first, the current value
2358: # the second an increment that this function applies to the current
2359: # value.
2360: #
2361: # Parameters:
2362: # $cmd - The command that got us here.
2363: # $tail - Tail of the command (remaining parameters).
2364: # $client - File descriptor connected to client.
2365: # Returns
2366: # 0 - Requested to exit, caller should shut down.
2367: # 1 - Continue processing.
2368: #
2369: sub increment_user_value_handler {
2370: my ($cmd, $tail, $client) = @_;
2371:
2372: my $userinput = "$cmd:$tail";
2373:
2374: my ($udom,$uname,$namespace,$what) =split(/:/,$tail);
2375: if ($namespace ne 'roles') {
2376: chomp($what);
2377: my $hashref = &tie_user_hash($udom, $uname,
2378: $namespace, &GDBM_WRCREAT(),
2379: "P",$what);
2380: if ($hashref) {
2381: my @pairs=split(/\&/,$what);
2382: foreach my $pair (@pairs) {
2383: my ($key,$value)=split(/=/,$pair);
2384: # We could check that we have a number...
2385: if (! defined($value) || $value eq '') {
2386: $value = 1;
2387: }
2388: $hashref->{$key}+=$value;
2389: }
2390: if (untie(%$hashref)) {
2391: &Reply( $client, "ok\n", $userinput);
2392: } else {
2393: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2394: "while attempting inc\n", $userinput);
2395: }
2396: } else {
2397: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2398: "while attempting inc\n", $userinput);
2399: }
2400: } else {
2401: &Failure($client, "refused\n", $userinput);
2402: }
2403:
2404: return 1;
2405: }
2406: ®ister_handler("inc", \&increment_user_value_handler, 0, 1, 0);
2407:
2408:
2409: #
2410: # Put a new role for a user. Roles are LonCAPA's packaging of permissions.
2411: # Each 'role' a user has implies a set of permissions. Adding a new role
2412: # for a person grants the permissions packaged with that role
2413: # to that user when the role is selected.
2414: #
2415: # Parameters:
2416: # $cmd - The command string (rolesput).
2417: # $tail - The remainder of the request line. For rolesput this
2418: # consists of a colon separated list that contains:
2419: # The domain and user that is granting the role (logged).
2420: # The domain and user that is getting the role.
2421: # The roles being granted as a set of & separated pairs.
2422: # each pair a key value pair.
2423: # $client - File descriptor connected to the client.
2424: # Returns:
2425: # 0 - If the daemon should exit
2426: # 1 - To continue processing.
2427: #
2428: #
2429: sub roles_put_handler {
2430: my ($cmd, $tail, $client) = @_;
2431:
2432: my $userinput = "$cmd:$tail";
2433:
2434: my ( $exedom, $exeuser, $udom, $uname, $what) = split(/:/,$tail);
2435:
2436:
2437: my $namespace='roles';
2438: chomp($what);
2439: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2440: &GDBM_WRCREAT(), "P",
2441: "$exedom:$exeuser:$what");
2442: #
2443: # Log the attempt to set a role. The {}'s here ensure that the file
2444: # handle is open for the minimal amount of time. Since the flush
2445: # is done on close this improves the chances the log will be an un-
2446: # corrupted ordered thing.
2447: if ($hashref) {
2448: my @pairs=split(/\&/,$what);
2449: foreach my $pair (@pairs) {
2450: my ($key,$value)=split(/=/,$pair);
1.260 ! foxr 2451: my $pass_entry = &get_auth_type($udom, $uname);
! 2452: my ($auth_type,$pwd) = split(/:/, $pass_entry);
! 2453: $auth_type = $auth_type.":";
1.230 foxr 2454: &manage_permissions($key, $udom, $uname,
1.260 ! foxr 2455: $auth_type);
1.230 foxr 2456: $hashref->{$key}=$value;
2457: }
2458: if (untie($hashref)) {
2459: &Reply($client, "ok\n", $userinput);
2460: } else {
2461: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2462: "while attempting rolesput\n", $userinput);
2463: }
2464: } else {
2465: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2466: "while attempting rolesput\n", $userinput);
2467: }
2468: return 1;
2469: }
2470: ®ister_handler("rolesput", \&roles_put_handler, 1,1,0); # Encoded client only.
2471:
2472: #
1.231 foxr 2473: # Deletes (removes) a role for a user. This is equivalent to removing
2474: # a permissions package associated with the role from the user's profile.
2475: #
2476: # Parameters:
2477: # $cmd - The command (rolesdel)
2478: # $tail - The remainder of the request line. This consists
2479: # of:
2480: # The domain and user requesting the change (logged)
2481: # The domain and user being changed.
2482: # The roles being revoked. These are shipped to us
2483: # as a bunch of & separated role name keywords.
2484: # $client - The file handle open on the client.
2485: # Returns:
2486: # 1 - Continue processing
2487: # 0 - Exit.
2488: #
2489: sub roles_delete_handler {
2490: my ($cmd, $tail, $client) = @_;
2491:
2492: my $userinput = "$cmd:$tail";
2493:
2494: my ($exedom,$exeuser,$udom,$uname,$what)=split(/:/,$tail);
2495: &Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom.
2496: "what = ".$what);
2497: my $namespace='roles';
2498: chomp($what);
2499: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2500: &GDBM_WRCREAT(), "D",
2501: "$exedom:$exeuser:$what");
2502:
2503: if ($hashref) {
2504: my @rolekeys=split(/\&/,$what);
2505:
2506: foreach my $key (@rolekeys) {
2507: delete $hashref->{$key};
2508: }
2509: if (untie(%$hashref)) {
2510: &Reply($client, "ok\n", $userinput);
2511: } else {
2512: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2513: "while attempting rolesdel\n", $userinput);
2514: }
2515: } else {
2516: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2517: "while attempting rolesdel\n", $userinput);
2518: }
2519:
2520: return 1;
2521: }
2522: ®ister_handler("rolesdel", \&roles_delete_handler, 1,1, 0); # Encoded client only
2523:
2524: # Unencrypted get from a user's profile database. See
2525: # GetProfileEntryEncrypted for a version that does end-to-end encryption.
2526: # This function retrieves a keyed item from a specific named database in the
2527: # user's directory.
2528: #
2529: # Parameters:
2530: # $cmd - Command request keyword (get).
2531: # $tail - Tail of the command. This is a colon separated list
2532: # consisting of the domain and username that uniquely
2533: # identifies the profile,
2534: # The 'namespace' which selects the gdbm file to
2535: # do the lookup in,
2536: # & separated list of keys to lookup. Note that
2537: # the values are returned as an & separated list too.
2538: # $client - File descriptor open on the client.
2539: # Returns:
2540: # 1 - Continue processing.
2541: # 0 - Exit.
2542: #
2543: sub get_profile_entry {
2544: my ($cmd, $tail, $client) = @_;
2545:
2546: my $userinput= "$cmd:$tail";
2547:
2548: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2549: chomp($what);
1.255 foxr 2550:
2551: my $replystring = read_profile($udom, $uname, $namespace, $what);
2552: my ($first) = split(/:/,$replystring);
2553: if($first ne "error") {
2554: &Reply($client, "$replystring\n", $userinput);
1.231 foxr 2555: } else {
1.255 foxr 2556: &Failure($client, $replystring." while attempting get\n", $userinput);
1.231 foxr 2557: }
2558: return 1;
1.255 foxr 2559:
2560:
1.231 foxr 2561: }
2562: ®ister_handler("get", \&get_profile_entry, 0,1,0);
2563:
2564: #
2565: # Process the encrypted get request. Note that the request is sent
2566: # in clear, but the reply is encrypted. This is a small covert channel:
2567: # information about the sensitive keys is given to the snooper. Just not
2568: # information about the values of the sensitive key. Hmm if I wanted to
2569: # know these I'd snoop for the egets. Get the profile item names from them
2570: # and then issue a get for them since there's no enforcement of the
2571: # requirement of an encrypted get for particular profile items. If I
2572: # were re-doing this, I'd force the request to be encrypted as well as the
2573: # reply. I'd also just enforce encrypted transactions for all gets since
2574: # that would prevent any covert channel snooping.
2575: #
2576: # Parameters:
2577: # $cmd - Command keyword of request (eget).
2578: # $tail - Tail of the command. See GetProfileEntry
# for more information about this.
2579: # $client - File open on the client.
2580: # Returns:
2581: # 1 - Continue processing
2582: # 0 - server should exit.
2583: sub get_profile_entry_encrypted {
2584: my ($cmd, $tail, $client) = @_;
2585:
2586: my $userinput = "$cmd:$tail";
2587:
2588: my ($cmd,$udom,$uname,$namespace,$what) = split(/:/,$userinput);
2589: chomp($what);
1.255 foxr 2590: my $qresult = read_profile($udom, $uname, $namespace, $what);
2591: my ($first) = split(/:/, $qresult);
2592: if($first ne "error") {
2593:
2594: if ($cipher) {
2595: my $cmdlength=length($qresult);
2596: $qresult.=" ";
2597: my $encqresult='';
2598: for(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
2599: $encqresult.= unpack("H16",
2600: $cipher->encrypt(substr($qresult,
2601: $encidx,
2602: 8)));
2603: }
2604: &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput);
2605: } else {
1.231 foxr 2606: &Failure( $client, "error:no_key\n", $userinput);
2607: }
2608: } else {
1.255 foxr 2609: &Failure($client, "$qresult while attempting eget\n", $userinput);
2610:
1.231 foxr 2611: }
2612:
2613: return 1;
2614: }
1.255 foxr 2615: ®ister_handler("eget", \&get_profile_entry_encrypted, 0, 1, 0);
1.231 foxr 2616: #
2617: # Deletes a key in a user profile database.
2618: #
2619: # Parameters:
2620: # $cmd - Command keyword (del).
2621: # $tail - Command tail. IN this case a colon
2622: # separated list containing:
2623: # The domain and user that identifies uniquely
2624: # the identity of the user.
2625: # The profile namespace (name of the profile
2626: # database file).
2627: # & separated list of keywords to delete.
2628: # $client - File open on client socket.
2629: # Returns:
2630: # 1 - Continue processing
2631: # 0 - Exit server.
2632: #
2633: #
2634:
2635: sub delete_profile_entry {
2636: my ($cmd, $tail, $client) = @_;
2637:
2638: my $userinput = "cmd:$tail";
2639:
2640: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2641: chomp($what);
2642: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2643: &GDBM_WRCREAT(),
2644: "D",$what);
2645: if ($hashref) {
2646: my @keys=split(/\&/,$what);
2647: foreach my $key (@keys) {
2648: delete($hashref->{$key});
2649: }
2650: if (untie(%$hashref)) {
2651: &Reply($client, "ok\n", $userinput);
2652: } else {
2653: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2654: "while attempting del\n", $userinput);
2655: }
2656: } else {
2657: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2658: "while attempting del\n", $userinput);
2659: }
2660: return 1;
2661: }
2662: ®ister_handler("del", \&delete_profile_entry, 0, 1, 0);
2663: #
2664: # List the set of keys that are defined in a profile database file.
2665: # A successful reply from this will contain an & separated list of
2666: # the keys.
2667: # Parameters:
2668: # $cmd - Command request (keys).
2669: # $tail - Remainder of the request, a colon separated
2670: # list containing domain/user that identifies the
2671: # user being queried, and the database namespace
2672: # (database filename essentially).
2673: # $client - File open on the client.
2674: # Returns:
2675: # 1 - Continue processing.
2676: # 0 - Exit the server.
2677: #
2678: sub get_profile_keys {
2679: my ($cmd, $tail, $client) = @_;
2680:
2681: my $userinput = "$cmd:$tail";
2682:
2683: my ($udom,$uname,$namespace)=split(/:/,$tail);
2684: my $qresult='';
2685: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2686: &GDBM_READER());
2687: if ($hashref) {
2688: foreach my $key (keys %$hashref) {
2689: $qresult.="$key&";
2690: }
2691: if (untie(%$hashref)) {
2692: $qresult=~s/\&$//;
2693: &Reply($client, "$qresult\n", $userinput);
2694: } else {
2695: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2696: "while attempting keys\n", $userinput);
2697: }
2698: } else {
2699: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2700: "while attempting keys\n", $userinput);
2701: }
2702:
2703: return 1;
2704: }
2705: ®ister_handler("keys", \&get_profile_keys, 0, 1, 0);
2706:
2707: #
2708: # Dump the contents of a user profile database.
2709: # Note that this constitutes a very large covert channel too since
2710: # the dump will return sensitive information that is not encrypted.
2711: # The naive security assumption is that the session negotiation ensures
2712: # our client is trusted and I don't believe that's assured at present.
2713: # Sure want badly to go to ssl or tls. Of course if my peer isn't really
2714: # a LonCAPA node they could have negotiated an encryption key too so >sigh<.
2715: #
2716: # Parameters:
2717: # $cmd - The command request keyword (currentdump).
2718: # $tail - Remainder of the request, consisting of a colon
2719: # separated list that has the domain/username and
2720: # the namespace to dump (database file).
2721: # $client - file open on the remote client.
2722: # Returns:
2723: # 1 - Continue processing.
2724: # 0 - Exit the server.
2725: #
2726: sub dump_profile_database {
2727: my ($cmd, $tail, $client) = @_;
2728:
2729: my $userinput = "$cmd:$tail";
2730:
2731: my ($udom,$uname,$namespace) = split(/:/,$tail);
2732: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2733: &GDBM_READER());
2734: if ($hashref) {
2735: # Structure of %data:
2736: # $data{$symb}->{$parameter}=$value;
2737: # $data{$symb}->{'v.'.$parameter}=$version;
2738: # since $parameter will be unescaped, we do not
2739: # have to worry about silly parameter names...
2740:
2741: my $qresult='';
2742: my %data = (); # A hash of anonymous hashes..
2743: while (my ($key,$value) = each(%$hashref)) {
2744: my ($v,$symb,$param) = split(/:/,$key);
2745: next if ($v eq 'version' || $symb eq 'keys');
2746: next if (exists($data{$symb}) &&
2747: exists($data{$symb}->{$param}) &&
2748: $data{$symb}->{'v.'.$param} > $v);
2749: $data{$symb}->{$param}=$value;
2750: $data{$symb}->{'v.'.$param}=$v;
2751: }
2752: if (untie(%$hashref)) {
2753: while (my ($symb,$param_hash) = each(%data)) {
2754: while(my ($param,$value) = each (%$param_hash)){
2755: next if ($param =~ /^v\./); # Ignore versions...
2756: #
2757: # Just dump the symb=value pairs separated by &
2758: #
2759: $qresult.=$symb.':'.$param.'='.$value.'&';
2760: }
2761: }
2762: chop($qresult);
2763: &Reply($client , "$qresult\n", $userinput);
2764: } else {
2765: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2766: "while attempting currentdump\n", $userinput);
2767: }
2768: } else {
2769: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2770: "while attempting currentdump\n", $userinput);
2771: }
2772:
2773: return 1;
2774: }
2775: ®ister_handler("currentdump", \&dump_profile_database, 0, 1, 0);
2776:
2777: #
2778: # Dump a profile database with an optional regular expression
2779: # to match against the keys. In this dump, no effort is made
2780: # to separate symb from version information. Presumably the
2781: # databases that are dumped by this command are of a different
2782: # structure. Need to look at this and improve the documentation of
2783: # both this and the currentdump handler.
2784: # Parameters:
2785: # $cmd - The command keyword.
2786: # $tail - All of the characters after the $cmd:
2787: # These are expected to be a colon
2788: # separated list containing:
2789: # domain/user - identifying the user.
2790: # namespace - identifying the database.
2791: # regexp - optional regular expression
2792: # that is matched against
2793: # database keywords to do
2794: # selective dumps.
2795: # $client - Channel open on the client.
2796: # Returns:
2797: # 1 - Continue processing.
2798: # Side effects:
2799: # response is written to $client.
2800: #
2801: sub dump_with_regexp {
2802: my ($cmd, $tail, $client) = @_;
2803:
2804:
2805: my $userinput = "$cmd:$tail";
2806:
2807: my ($udom,$uname,$namespace,$regexp)=split(/:/,$tail);
2808: if (defined($regexp)) {
2809: $regexp=&unescape($regexp);
2810: } else {
2811: $regexp='.';
2812: }
2813: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2814: &GDBM_READER());
2815: if ($hashref) {
2816: my $qresult='';
2817: while (my ($key,$value) = each(%$hashref)) {
2818: if ($regexp eq '.') {
2819: $qresult.=$key.'='.$value.'&';
2820: } else {
2821: my $unescapeKey = &unescape($key);
2822: if (eval('$unescapeKey=~/$regexp/')) {
2823: $qresult.="$key=$value&";
2824: }
2825: }
2826: }
2827: if (untie(%$hashref)) {
2828: chop($qresult);
2829: &Reply($client, "$qresult\n", $userinput);
2830: } else {
2831: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2832: "while attempting dump\n", $userinput);
2833: }
2834: } else {
2835: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2836: "while attempting dump\n", $userinput);
2837: }
2838:
2839: return 1;
2840: }
2841:
2842: ®ister_handler("dump", \&dump_with_regexp, 0, 1, 0);
2843:
2844: # Store a set of key=value pairs associated with a versioned name.
2845: #
2846: # Parameters:
2847: # $cmd - Request command keyword.
2848: # $tail - Tail of the request. This is a colon
2849: # separated list containing:
2850: # domain/user - User and authentication domain.
2851: # namespace - Name of the database being modified
2852: # rid - Resource keyword to modify.
2853: # what - new value associated with rid.
2854: #
2855: # $client - Socket open on the client.
2856: #
2857: #
2858: # Returns:
2859: # 1 (keep on processing).
2860: # Side-Effects:
2861: # Writes to the client
2862: sub store_handler {
2863: my ($cmd, $tail, $client) = @_;
2864:
2865: my $userinput = "$cmd:$tail";
2866:
2867: my ($udom,$uname,$namespace,$rid,$what) =split(/:/,$tail);
2868: if ($namespace ne 'roles') {
2869:
2870: chomp($what);
2871: my @pairs=split(/\&/,$what);
2872: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2873: &GDBM_WRCREAT(), "P",
2874: "$rid:$what");
2875: if ($hashref) {
2876: my $now = time;
2877: my @previouskeys=split(/&/,$hashref->{"keys:$rid"});
2878: my $key;
2879: $hashref->{"version:$rid"}++;
2880: my $version=$hashref->{"version:$rid"};
2881: my $allkeys='';
2882: foreach my $pair (@pairs) {
2883: my ($key,$value)=split(/=/,$pair);
2884: $allkeys.=$key.':';
2885: $hashref->{"$version:$rid:$key"}=$value;
2886: }
2887: $hashref->{"$version:$rid:timestamp"}=$now;
2888: $allkeys.='timestamp';
2889: $hashref->{"$version:keys:$rid"}=$allkeys;
2890: if (untie($hashref)) {
2891: &Reply($client, "ok\n", $userinput);
2892: } else {
2893: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2894: "while attempting store\n", $userinput);
2895: }
2896: } else {
2897: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2898: "while attempting store\n", $userinput);
2899: }
2900: } else {
2901: &Failure($client, "refused\n", $userinput);
2902: }
2903:
2904: return 1;
2905: }
2906: ®ister_handler("store", \&store_handler, 0, 1, 0);
2907: #
2908: # Dump out all versions of a resource that has key=value pairs associated
2909: # with it for each version. These resources are built up via the store
2910: # command.
2911: #
2912: # Parameters:
2913: # $cmd - Command keyword.
2914: # $tail - Remainder of the request which consists of:
2915: # domain/user - User and auth. domain.
2916: # namespace - name of resource database.
2917: # rid - Resource id.
2918: # $client - socket open on the client.
2919: #
2920: # Returns:
2921: # 1 indicating the caller should not yet exit.
2922: # Side-effects:
2923: # Writes a reply to the client.
2924: # The reply is a string of the following shape:
2925: # version=current&version:keys=k1:k2...&1:k1=v1&1:k2=v2...
2926: # Where the 1 above represents version 1.
2927: # this continues for all pairs of keys in all versions.
2928: #
2929: #
2930: #
2931: #
2932: sub restore_handler {
2933: my ($cmd, $tail, $client) = @_;
2934:
2935: my $userinput = "$cmd:$tail"; # Only used for logging purposes.
2936:
2937: my ($cmd,$udom,$uname,$namespace,$rid) = split(/:/,$userinput);
2938: $namespace=~s/\//\_/g;
2939: $namespace=~s/\W//g;
2940: chomp($rid);
2941: my $proname=&propath($udom,$uname);
2942: my $qresult='';
2943: my %hash;
2944: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",
2945: &GDBM_READER(),0640)) {
2946: my $version=$hash{"version:$rid"};
2947: $qresult.="version=$version&";
2948: my $scope;
2949: for ($scope=1;$scope<=$version;$scope++) {
2950: my $vkeys=$hash{"$scope:keys:$rid"};
2951: my @keys=split(/:/,$vkeys);
2952: my $key;
2953: $qresult.="$scope:keys=$vkeys&";
2954: foreach $key (@keys) {
2955: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
2956: }
2957: }
2958: if (untie(%hash)) {
2959: $qresult=~s/\&$//;
2960: &Reply( $client, "$qresult\n", $userinput);
2961: } else {
2962: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2963: "while attempting restore\n", $userinput);
2964: }
2965: } else {
2966: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2967: "while attempting restore\n", $userinput);
2968: }
2969:
2970: return 1;
2971:
2972:
2973: }
2974: ®ister_handler("restore", \&restore_handler, 0,1,0);
1.234 foxr 2975:
2976: #
2977: # Add a chat message to to a discussion board.
2978: #
2979: # Parameters:
2980: # $cmd - Request keyword.
2981: # $tail - Tail of the command. A colon separated list
2982: # containing:
2983: # cdom - Domain on which the chat board lives
2984: # cnum - Identifier of the discussion group.
2985: # post - Body of the posting.
2986: # $client - Socket open on the client.
2987: # Returns:
2988: # 1 - Indicating caller should keep on processing.
2989: #
2990: # Side-effects:
2991: # writes a reply to the client.
2992: #
2993: #
2994: sub send_chat_handler {
2995: my ($cmd, $tail, $client) = @_;
2996:
2997:
2998: my $userinput = "$cmd:$tail";
2999:
3000: my ($cdom,$cnum,$newpost)=split(/\:/,$tail);
3001: &chat_add($cdom,$cnum,$newpost);
3002: &Reply($client, "ok\n", $userinput);
3003:
3004: return 1;
3005: }
3006: ®ister_handler("chatsend", \&send_chat_handler, 0, 1, 0);
3007: #
3008: # Retrieve the set of chat messagss from a discussion board.
3009: #
3010: # Parameters:
3011: # $cmd - Command keyword that initiated the request.
3012: # $tail - Remainder of the request after the command
3013: # keyword. In this case a colon separated list of
3014: # chat domain - Which discussion board.
3015: # chat id - Discussion thread(?)
3016: # domain/user - Authentication domain and username
3017: # of the requesting person.
3018: # $client - Socket open on the client program.
3019: # Returns:
3020: # 1 - continue processing
3021: # Side effects:
3022: # Response is written to the client.
3023: #
3024: sub retrieve_chat_handler {
3025: my ($cmd, $tail, $client) = @_;
3026:
3027:
3028: my $userinput = "$cmd:$tail";
3029:
3030: my ($cdom,$cnum,$udom,$uname)=split(/\:/,$tail);
3031: my $reply='';
3032: foreach (&get_chat($cdom,$cnum,$udom,$uname)) {
3033: $reply.=&escape($_).':';
3034: }
3035: $reply=~s/\:$//;
3036: &Reply($client, $reply."\n", $userinput);
3037:
3038:
3039: return 1;
3040: }
3041: ®ister_handler("chatretr", \&retrieve_chat_handler, 0, 1, 0);
3042:
3043: #
3044: # Initiate a query of an sql database. SQL query repsonses get put in
3045: # a file for later retrieval. This prevents sql query results from
3046: # bottlenecking the system. Note that with loncnew, perhaps this is
3047: # less of an issue since multiple outstanding requests can be concurrently
3048: # serviced.
3049: #
3050: # Parameters:
3051: # $cmd - COmmand keyword that initiated the request.
3052: # $tail - Remainder of the command after the keyword.
3053: # For this function, this consists of a query and
3054: # 3 arguments that are self-documentingly labelled
3055: # in the original arg1, arg2, arg3.
3056: # $client - Socket open on the client.
3057: # Return:
3058: # 1 - Indicating processing should continue.
3059: # Side-effects:
3060: # a reply is written to $client.
3061: #
3062: sub send_query_handler {
3063: my ($cmd, $tail, $client) = @_;
3064:
3065:
3066: my $userinput = "$cmd:$tail";
3067:
3068: my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail);
3069: $query=~s/\n*$//g;
3070: &Reply($client, "". &sql_reply("$clientname\&$query".
3071: "\&$arg1"."\&$arg2"."\&$arg3")."\n",
3072: $userinput);
3073:
3074: return 1;
3075: }
3076: ®ister_handler("querysend", \&send_query_handler, 0, 1, 0);
3077:
3078: #
3079: # Add a reply to an sql query. SQL queries are done asyncrhonously.
3080: # The query is submitted via a "querysend" transaction.
3081: # There it is passed on to the lonsql daemon, queued and issued to
3082: # mysql.
3083: # This transaction is invoked when the sql transaction is complete
3084: # it stores the query results in flie and indicates query completion.
3085: # presumably local software then fetches this response... I'm guessing
3086: # the sequence is: lonc does a querysend, we ask lonsql to do it.
3087: # lonsql on completion of the query interacts with the lond of our
3088: # client to do a query reply storing two files:
3089: # - id - The results of the query.
3090: # - id.end - Indicating the transaction completed.
3091: # NOTE: id is a unique id assigned to the query and querysend time.
3092: # Parameters:
3093: # $cmd - Command keyword that initiated this request.
3094: # $tail - Remainder of the tail. In this case that's a colon
3095: # separated list containing the query Id and the
3096: # results of the query.
3097: # $client - Socket open on the client.
3098: # Return:
3099: # 1 - Indicating that we should continue processing.
3100: # Side effects:
3101: # ok written to the client.
3102: #
3103: sub reply_query_handler {
3104: my ($cmd, $tail, $client) = @_;
3105:
3106:
3107: my $userinput = "$cmd:$tail";
3108:
3109: my ($cmd,$id,$reply)=split(/:/,$userinput);
3110: my $store;
3111: my $execdir=$perlvar{'lonDaemons'};
3112: if ($store=IO::File->new(">$execdir/tmp/$id")) {
3113: $reply=~s/\&/\n/g;
3114: print $store $reply;
3115: close $store;
3116: my $store2=IO::File->new(">$execdir/tmp/$id.end");
3117: print $store2 "done\n";
3118: close $store2;
3119: &Reply($client, "ok\n", $userinput);
3120: } else {
3121: &Failure($client, "error: ".($!+0)
3122: ." IO::File->new Failed ".
3123: "while attempting queryreply\n", $userinput);
3124: }
3125:
3126:
3127: return 1;
3128: }
3129: ®ister_handler("queryreply", \&reply_query_handler, 0, 1, 0);
3130:
3131: #
3132: # Process the courseidput request. Not quite sure what this means
3133: # at the system level sense. It appears a gdbm file in the
3134: # /home/httpd/lonUsers/$domain/nohist_courseids is tied and
3135: # a set of entries made in that database.
3136: #
3137: # Parameters:
3138: # $cmd - The command keyword that initiated this request.
3139: # $tail - Tail of the command. In this case consists of a colon
3140: # separated list contaning the domain to apply this to and
3141: # an ampersand separated list of keyword=value pairs.
3142: # $client - Socket open on the client.
3143: # Returns:
3144: # 1 - indicating that processing should continue
3145: #
3146: # Side effects:
3147: # reply is written to the client.
3148: #
3149: sub put_course_id_handler {
3150: my ($cmd, $tail, $client) = @_;
3151:
3152:
3153: my $userinput = "$cmd:$tail";
3154:
3155: my ($udom, $what) = split(/:/, $tail);
3156: chomp($what);
3157: my $now=time;
3158: my @pairs=split(/\&/,$what);
3159:
3160: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3161: if ($hashref) {
3162: foreach my $pair (@pairs) {
1.253 foxr 3163: my ($key,$descr,$inst_code)=split(/=/,$pair);
3164: $hashref->{$key}=$descr.':'.$inst_code.':'.$now;
1.234 foxr 3165: }
3166: if (untie(%$hashref)) {
1.253 foxr 3167: &Reply( $client, "ok\n", $userinput);
1.234 foxr 3168: } else {
1.253 foxr 3169: &Failure($client, "error: ".($!+0)
1.234 foxr 3170: ." untie(GDBM) Failed ".
3171: "while attempting courseidput\n", $userinput);
3172: }
3173: } else {
1.253 foxr 3174: &Failure($client, "error: ".($!+0)
1.234 foxr 3175: ." tie(GDBM) Failed ".
3176: "while attempting courseidput\n", $userinput);
3177: }
1.253 foxr 3178:
1.234 foxr 3179:
3180: return 1;
3181: }
3182: ®ister_handler("courseidput", \&put_course_id_handler, 0, 1, 0);
3183:
3184: # Retrieves the value of a course id resource keyword pattern
3185: # defined since a starting date. Both the starting date and the
3186: # keyword pattern are optional. If the starting date is not supplied it
3187: # is treated as the beginning of time. If the pattern is not found,
3188: # it is treatred as "." matching everything.
3189: #
3190: # Parameters:
3191: # $cmd - Command keyword that resulted in us being dispatched.
3192: # $tail - The remainder of the command that, in this case, consists
3193: # of a colon separated list of:
3194: # domain - The domain in which the course database is
3195: # defined.
3196: # since - Optional parameter describing the minimum
3197: # time of definition(?) of the resources that
3198: # will match the dump.
3199: # description - regular expression that is used to filter
3200: # the dump. Only keywords matching this regexp
3201: # will be used.
3202: # $client - The socket open on the client.
3203: # Returns:
3204: # 1 - Continue processing.
3205: # Side Effects:
3206: # a reply is written to $client.
3207: sub dump_course_id_handler {
3208: my ($cmd, $tail, $client) = @_;
3209:
3210: my $userinput = "$cmd:$tail";
3211:
3212: my ($udom,$since,$description) =split(/:/,$tail);
3213: if (defined($description)) {
3214: $description=&unescape($description);
3215: } else {
3216: $description='.';
3217: }
3218: unless (defined($since)) { $since=0; }
3219: my $qresult='';
3220: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3221: if ($hashref) {
3222: while (my ($key,$value) = each(%$hashref)) {
3223: my ($descr,$lasttime,$inst_code);
3224: if ($value =~ m/^([^\:]*):([^\:]*):(\d+)$/) {
3225: ($descr,$inst_code,$lasttime)=($1,$2,$3);
3226: } else {
3227: ($descr,$lasttime) = split(/\:/,$value);
3228: }
3229: if ($lasttime<$since) { next; }
3230: if ($description eq '.') {
3231: $qresult.=$key.'='.$descr.':'.$inst_code.'&';
3232: } else {
3233: my $unescapeVal = &unescape($descr);
3234: if (eval('$unescapeVal=~/\Q$description\E/i')) {
3235: $qresult.=$key.'='.$descr.':'.$inst_code.'&';
3236: }
3237: }
3238: }
3239: if (untie(%$hashref)) {
3240: chop($qresult);
3241: &Reply($client, "$qresult\n", $userinput);
3242: } else {
3243: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3244: "while attempting courseiddump\n", $userinput);
3245: }
3246: } else {
3247: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3248: "while attempting courseiddump\n", $userinput);
3249: }
3250:
3251:
3252: return 1;
3253: }
3254: ®ister_handler("courseiddump", \&dump_course_id_handler, 0, 1, 0);
1.238 foxr 3255:
3256: #
3257: # Puts an id to a domains id database.
3258: #
3259: # Parameters:
3260: # $cmd - The command that triggered us.
3261: # $tail - Remainder of the request other than the command. This is a
3262: # colon separated list containing:
3263: # $domain - The domain for which we are writing the id.
3264: # $pairs - The id info to write... this is and & separated list
3265: # of keyword=value.
3266: # $client - Socket open on the client.
3267: # Returns:
3268: # 1 - Continue processing.
3269: # Side effects:
3270: # reply is written to $client.
3271: #
3272: sub put_id_handler {
3273: my ($cmd,$tail,$client) = @_;
3274:
3275:
3276: my $userinput = "$cmd:$tail";
3277:
3278: my ($udom,$what)=split(/:/,$tail);
3279: chomp($what);
3280: my @pairs=split(/\&/,$what);
3281: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
3282: "P", $what);
3283: if ($hashref) {
3284: foreach my $pair (@pairs) {
3285: my ($key,$value)=split(/=/,$pair);
3286: $hashref->{$key}=$value;
3287: }
3288: if (untie(%$hashref)) {
3289: &Reply($client, "ok\n", $userinput);
3290: } else {
3291: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3292: "while attempting idput\n", $userinput);
3293: }
3294: } else {
3295: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3296: "while attempting idput\n", $userinput);
3297: }
3298:
3299: return 1;
3300: }
3301:
3302: ®ister_handler("idput", \&put_id_handler, 0, 1, 0);
3303: #
3304: # Retrieves a set of id values from the id database.
3305: # Returns an & separated list of results, one for each requested id to the
3306: # client.
3307: #
3308: # Parameters:
3309: # $cmd - Command keyword that caused us to be dispatched.
3310: # $tail - Tail of the command. Consists of a colon separated:
3311: # domain - the domain whose id table we dump
3312: # ids Consists of an & separated list of
3313: # id keywords whose values will be fetched.
3314: # nonexisting keywords will have an empty value.
3315: # $client - Socket open on the client.
3316: #
3317: # Returns:
3318: # 1 - indicating processing should continue.
3319: # Side effects:
3320: # An & separated list of results is written to $client.
3321: #
3322: sub get_id_handler {
3323: my ($cmd, $tail, $client) = @_;
3324:
3325:
3326: my $userinput = "$client:$tail";
3327:
3328: my ($udom,$what)=split(/:/,$tail);
3329: chomp($what);
3330: my @queries=split(/\&/,$what);
3331: my $qresult='';
3332: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_READER());
3333: if ($hashref) {
3334: for (my $i=0;$i<=$#queries;$i++) {
3335: $qresult.="$hashref->{$queries[$i]}&";
3336: }
3337: if (untie(%$hashref)) {
3338: $qresult=~s/\&$//;
3339: &Reply($client, "$qresult\n", $userinput);
3340: } else {
3341: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3342: "while attempting idget\n",$userinput);
3343: }
3344: } else {
3345: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3346: "while attempting idget\n",$userinput);
3347: }
3348:
3349: return 1;
3350: }
3351:
3352: register_handler("idget", \&get_id_handler, 0, 1, 0);
3353:
3354: #
3355: # Process the tmpput command I'm not sure what this does.. Seems to
3356: # create a file in the lonDaemons/tmp directory of the form $id.tmp
3357: # where Id is the client's ip concatenated with a sequence number.
3358: # The file will contain some value that is passed in. Is this e.g.
3359: # a login token?
3360: #
3361: # Parameters:
3362: # $cmd - The command that got us dispatched.
3363: # $tail - The remainder of the request following $cmd:
3364: # In this case this will be the contents of the file.
3365: # $client - Socket connected to the client.
3366: # Returns:
3367: # 1 indicating processing can continue.
3368: # Side effects:
3369: # A file is created in the local filesystem.
3370: # A reply is sent to the client.
3371: sub tmp_put_handler {
3372: my ($cmd, $what, $client) = @_;
3373:
3374: my $userinput = "$cmd:$what"; # Reconstruct for logging.
3375:
3376:
3377: my $store;
3378: $tmpsnum++;
3379: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
3380: $id=~s/\W/\_/g;
3381: $what=~s/\n//g;
3382: my $execdir=$perlvar{'lonDaemons'};
3383: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
3384: print $store $what;
3385: close $store;
3386: &Reply($client, "$id\n", $userinput);
3387: } else {
3388: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
3389: "while attempting tmpput\n", $userinput);
3390: }
3391: return 1;
3392:
3393: }
3394: ®ister_handler("tmpput", \&tmp_put_handler, 0, 1, 0);
3395: # Processes the tmpget command. This command returns the contents
3396: # of a temporary resource file(?) created via tmpput.
3397: #
3398: # Paramters:
3399: # $cmd - Command that got us dispatched.
3400: # $id - Tail of the command, contain the id of the resource
3401: # we want to fetch.
3402: # $client - socket open on the client.
3403: # Return:
3404: # 1 - Inidcating processing can continue.
3405: # Side effects:
3406: # A reply is sent to the client.
3407:
3408: #
3409: sub tmp_get_handler {
3410: my ($cmd, $id, $client) = @_;
3411:
3412: my $userinput = "$cmd:$id";
3413:
3414:
3415: $id=~s/\W/\_/g;
3416: my $store;
3417: my $execdir=$perlvar{'lonDaemons'};
3418: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
3419: my $reply=<$store>;
3420: &Reply( $client, "$reply\n", $userinput);
3421: close $store;
3422: } else {
3423: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
3424: "while attempting tmpget\n", $userinput);
3425: }
3426:
3427: return 1;
3428: }
3429: ®ister_handler("tmpget", \&tmp_get_handler, 0, 1, 0);
3430: #
3431: # Process the tmpdel command. This command deletes a temp resource
3432: # created by the tmpput command.
3433: #
3434: # Parameters:
3435: # $cmd - Command that got us here.
3436: # $id - Id of the temporary resource created.
3437: # $client - socket open on the client process.
3438: #
3439: # Returns:
3440: # 1 - Indicating processing should continue.
3441: # Side Effects:
3442: # A file is deleted
3443: # A reply is sent to the client.
3444: sub tmp_del_handler {
3445: my ($cmd, $id, $client) = @_;
3446:
3447: my $userinput= "$cmd:$id";
3448:
3449: chomp($id);
3450: $id=~s/\W/\_/g;
3451: my $execdir=$perlvar{'lonDaemons'};
3452: if (unlink("$execdir/tmp/$id.tmp")) {
3453: &Reply($client, "ok\n", $userinput);
3454: } else {
3455: &Failure( $client, "error: ".($!+0)."Unlink tmp Failed ".
3456: "while attempting tmpdel\n", $userinput);
3457: }
3458:
3459: return 1;
3460:
3461: }
3462: ®ister_handler("tmpdel", \&tmp_del_handler, 0, 1, 0);
3463: #
1.246 foxr 3464: # Processes the setannounce command. This command
3465: # creates a file named announce.txt in the top directory of
3466: # the documentn root and sets its contents. The announce.txt file is
3467: # printed in its entirety at the LonCAPA login page. Note:
3468: # once the announcement.txt fileis created it cannot be deleted.
3469: # However, setting the contents of the file to empty removes the
3470: # announcement from the login page of loncapa so who cares.
3471: #
3472: # Parameters:
3473: # $cmd - The command that got us dispatched.
3474: # $announcement - The text of the announcement.
3475: # $client - Socket open on the client process.
3476: # Retunrns:
3477: # 1 - Indicating request processing should continue
3478: # Side Effects:
3479: # The file {DocRoot}/announcement.txt is created.
3480: # A reply is sent to $client.
3481: #
3482: sub set_announce_handler {
3483: my ($cmd, $announcement, $client) = @_;
3484:
3485: my $userinput = "$cmd:$announcement";
3486:
3487: chomp($announcement);
3488: $announcement=&unescape($announcement);
3489: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
3490: '/announcement.txt')) {
3491: print $store $announcement;
3492: close $store;
3493: &Reply($client, "ok\n", $userinput);
3494: } else {
3495: &Failure($client, "error: ".($!+0)."\n", $userinput);
3496: }
3497:
3498: return 1;
3499: }
3500: ®ister_handler("setannounce", \&set_announce_handler, 0, 1, 0);
3501: #
3502: # Return the version of the daemon. This can be used to determine
3503: # the compatibility of cross version installations or, alternatively to
3504: # simply know who's out of date and who isn't. Note that the version
3505: # is returned concatenated with the tail.
3506: # Parameters:
3507: # $cmd - the request that dispatched to us.
3508: # $tail - Tail of the request (client's version?).
3509: # $client - Socket open on the client.
3510: #Returns:
3511: # 1 - continue processing requests.
3512: # Side Effects:
3513: # Replies with version to $client.
3514: sub get_version_handler {
3515: my ($cmd, $tail, $client) = @_;
3516:
3517: my $userinput = $cmd.$tail;
3518:
3519: &Reply($client, &version($userinput)."\n", $userinput);
3520:
3521:
3522: return 1;
3523: }
3524: ®ister_handler("version", \&get_version_handler, 0, 1, 0);
3525: # Set the current host and domain. This is used to support
3526: # multihomed systems. Each IP of the system, or even separate daemons
3527: # on the same IP can be treated as handling a separate lonCAPA virtual
3528: # machine. This command selects the virtual lonCAPA. The client always
3529: # knows the right one since it is lonc and it is selecting the domain/system
3530: # from the hosts.tab file.
3531: # Parameters:
3532: # $cmd - Command that dispatched us.
3533: # $tail - Tail of the command (domain/host requested).
3534: # $socket - Socket open on the client.
3535: #
3536: # Returns:
3537: # 1 - Indicates the program should continue to process requests.
3538: # Side-effects:
3539: # The default domain/system context is modified for this daemon.
3540: # a reply is sent to the client.
3541: #
3542: sub set_virtual_host_handler {
3543: my ($cmd, $tail, $socket) = @_;
3544:
3545: my $userinput ="$cmd:$tail";
3546:
3547: &Reply($client, &sethost($userinput)."\n", $userinput);
3548:
3549:
3550: return 1;
3551: }
1.247 albertel 3552: ®ister_handler("sethost", \&set_virtual_host_handler, 0, 1, 0);
1.246 foxr 3553:
3554: # Process a request to exit:
3555: # - "bye" is sent to the client.
3556: # - The client socket is shutdown and closed.
3557: # - We indicate to the caller that we should exit.
3558: # Formal Parameters:
3559: # $cmd - The command that got us here.
3560: # $tail - Tail of the command (empty).
3561: # $client - Socket open on the tail.
3562: # Returns:
3563: # 0 - Indicating the program should exit!!
3564: #
3565: sub exit_handler {
3566: my ($cmd, $tail, $client) = @_;
3567:
3568: my $userinput = "$cmd:$tail";
3569:
3570: &logthis("Client $clientip ($clientname) hanging up: $userinput");
3571: &Reply($client, "bye\n", $userinput);
3572: $client->shutdown(2); # shutdown the socket forcibly.
3573: $client->close();
3574:
3575: return 0;
3576: }
1.248 foxr 3577: ®ister_handler("exit", \&exit_handler, 0,1,1);
3578: ®ister_handler("init", \&exit_handler, 0,1,1);
3579: ®ister_handler("quit", \&exit_handler, 0,1,1);
3580:
3581: # Determine if auto-enrollment is enabled.
3582: # Note that the original had what I believe to be a defect.
3583: # The original returned 0 if the requestor was not a registerd client.
3584: # It should return "refused".
3585: # Formal Parameters:
3586: # $cmd - The command that invoked us.
3587: # $tail - The tail of the command (Extra command parameters.
3588: # $client - The socket open on the client that issued the request.
3589: # Returns:
3590: # 1 - Indicating processing should continue.
3591: #
3592: sub enrollment_enabled_handler {
3593: my ($cmd, $tail, $client) = @_;
3594: my $userinput = $cmd.":".$tail; # For logging purposes.
3595:
3596:
3597: my $cdom = split(/:/, $tail); # Domain we're asking about.
3598: my $outcome = &localenroll::run($cdom);
3599: &Reply($client, "$outcome\n", $userinput);
3600:
3601: return 1;
3602: }
3603: ®ister_handler("autorun", \&enrollment_enabled_handler, 0, 1, 0);
3604:
3605: # Get the official sections for which auto-enrollment is possible.
3606: # Since the admin people won't know about 'unofficial sections'
3607: # we cannot auto-enroll on them.
3608: # Formal Parameters:
3609: # $cmd - The command request that got us dispatched here.
3610: # $tail - The remainder of the request. In our case this
3611: # will be split into:
3612: # $coursecode - The course name from the admin point of view.
3613: # $cdom - The course's domain(?).
3614: # $client - Socket open on the client.
3615: # Returns:
3616: # 1 - Indiciting processing should continue.
3617: #
3618: sub get_sections_handler {
3619: my ($cmd, $tail, $client) = @_;
3620: my $userinput = "$cmd:$tail";
3621:
3622: my ($coursecode, $cdom) = split(/:/, $tail);
3623: my @secs = &localenroll::get_sections($coursecode,$cdom);
3624: my $seclist = &escape(join(':',@secs));
3625:
3626: &Reply($client, "$seclist\n", $userinput);
3627:
3628:
3629: return 1;
3630: }
3631: ®ister_handler("autogetsections", \&get_sections_handler, 0, 1, 0);
3632:
3633: # Validate the owner of a new course section.
3634: #
3635: # Formal Parameters:
3636: # $cmd - Command that got us dispatched.
3637: # $tail - the remainder of the command. For us this consists of a
3638: # colon separated string containing:
3639: # $inst - Course Id from the institutions point of view.
3640: # $owner - Proposed owner of the course.
3641: # $cdom - Domain of the course (from the institutions
3642: # point of view?)..
3643: # $client - Socket open on the client.
3644: #
3645: # Returns:
3646: # 1 - Processing should continue.
3647: #
3648: sub validate_course_owner_handler {
3649: my ($cmd, $tail, $client) = @_;
3650: my $userinput = "$cmd:$tail";
3651: my ($inst_course_id, $owner, $cdom) = split(/:/, $tail);
3652:
3653: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom);
3654: &Reply($client, "$outcome\n", $userinput);
3655:
3656:
3657:
3658: return 1;
3659: }
3660: ®ister_handler("autonewcourse", \&validate_course_owner_handler, 0, 1, 0);
3661: #
3662: # Validate a course section in the official schedule of classes
3663: # from the institutions point of view (part of autoenrollment).
3664: #
3665: # Formal Parameters:
3666: # $cmd - The command request that got us dispatched.
3667: # $tail - The tail of the command. In this case,
3668: # this is a colon separated set of words that will be split
3669: # into:
3670: # $inst_course_id - The course/section id from the
3671: # institutions point of view.
3672: # $cdom - The domain from the institutions
3673: # point of view.
3674: # $client - Socket open on the client.
3675: # Returns:
3676: # 1 - Indicating processing should continue.
3677: #
3678: sub validate_course_section_handler {
3679: my ($cmd, $tail, $client) = @_;
3680: my $userinput = "$cmd:$tail";
3681: my ($inst_course_id, $cdom) = split(/:/, $tail);
3682:
3683: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
3684: &Reply($client, "$outcome\n", $userinput);
3685:
3686:
3687: return 1;
3688: }
3689: ®ister_handler("autovalidatecourse", \&validate_course_section_handler, 0, 1, 0);
3690:
3691: #
3692: # Create a password for a new auto-enrollment user.
3693: # I think/guess, this password allows access to the institutions
3694: # AIS class list server/services. Stuart can correct this comment
3695: # when he finds out how wrong I am.
3696: #
3697: # Formal Parameters:
3698: # $cmd - The command request that got us dispatched.
3699: # $tail - The tail of the command. In this case this is a colon separated
3700: # set of words that will be split into:
3701: # $authparam - An authentication parameter (username??).
3702: # $cdom - The domain of the course from the institution's
3703: # point of view.
3704: # $client - The socket open on the client.
3705: # Returns:
3706: # 1 - continue processing.
3707: #
3708: sub create_auto_enroll_password_handler {
3709: my ($cmd, $tail, $client) = @_;
3710: my $userinput = "$cmd:$tail";
3711:
3712: my ($authparam, $cdom) = split(/:/, $userinput);
3713:
3714: my ($create_passwd,$authchk);
3715: ($authparam,
3716: $create_passwd,
3717: $authchk) = &localenroll::create_password($authparam,$cdom);
3718:
3719: &Reply($client, &escape($authparam.':'.$create_passwd.':'.$authchk)."\n",
3720: $userinput);
3721:
3722:
3723: return 1;
3724: }
3725: ®ister_handler("autocreatepassword", \&create_auto_enroll_password_handler,
3726: 0, 1, 0);
3727:
3728: # Retrieve and remove temporary files created by/during autoenrollment.
3729: #
3730: # Formal Parameters:
3731: # $cmd - The command that got us dispatched.
3732: # $tail - The tail of the command. In our case this is a colon
3733: # separated list that will be split into:
3734: # $filename - The name of the file to remove.
3735: # The filename is given as a path relative to
3736: # the LonCAPA temp file directory.
3737: # $client - Socket open on the client.
3738: #
3739: # Returns:
3740: # 1 - Continue processing.
3741:
3742: sub retrieve_auto_file_handler {
3743: my ($cmd, $tail, $client) = @_;
3744: my $userinput = "cmd:$tail";
3745:
3746: my ($filename) = split(/:/, $tail);
3747:
3748: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
3749: if ( (-e $source) && ($filename ne '') ) {
3750: my $reply = '';
3751: if (open(my $fh,$source)) {
3752: while (<$fh>) {
3753: chomp($_);
3754: $_ =~ s/^\s+//g;
3755: $_ =~ s/\s+$//g;
3756: $reply .= $_;
3757: }
3758: close($fh);
3759: &Reply($client, &escape($reply)."\n", $userinput);
3760:
3761: # Does this have to be uncommented??!? (RF).
3762: #
3763: # unlink($source);
3764: } else {
3765: &Failure($client, "error\n", $userinput);
3766: }
3767: } else {
3768: &Failure($client, "error\n", $userinput);
3769: }
3770:
3771:
3772: return 1;
3773: }
3774: ®ister_handler("autoretrieve", \&retrieve_auto_file_handler, 0,1,0);
3775:
3776: #
3777: # Read and retrieve institutional code format (for support form).
3778: # Formal Parameters:
3779: # $cmd - Command that dispatched us.
3780: # $tail - Tail of the command. In this case it conatins
3781: # the course domain and the coursename.
3782: # $client - Socket open on the client.
3783: # Returns:
3784: # 1 - Continue processing.
3785: #
3786: sub get_institutional_code_format_handler {
3787: my ($cmd, $tail, $client) = @_;
3788: my $userinput = "$cmd:$tail";
3789:
3790: my $reply;
3791: my($cdom,$course) = split(/:/,$tail);
3792: my @pairs = split/\&/,$course;
3793: my %instcodes = ();
3794: my %codes = ();
3795: my @codetitles = ();
3796: my %cat_titles = ();
3797: my %cat_order = ();
3798: foreach (@pairs) {
3799: my ($key,$value) = split/=/,$_;
3800: $instcodes{&unescape($key)} = &unescape($value);
3801: }
3802: my $formatreply = &localenroll::instcode_format($cdom,
3803: \%instcodes,
3804: \%codes,
3805: \@codetitles,
3806: \%cat_titles,
3807: \%cat_order);
3808: if ($formatreply eq 'ok') {
3809: my $codes_str = &hash2str(%codes);
3810: my $codetitles_str = &array2str(@codetitles);
3811: my $cat_titles_str = &hash2str(%cat_titles);
3812: my $cat_order_str = &hash2str(%cat_order);
3813: &Reply($client,
3814: $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'
3815: .$cat_order_str."\n",
3816: $userinput);
3817: } else {
3818: # this else branch added by RF since if not ok, lonc will
3819: # hang waiting on reply until timeout.
3820: #
3821: &Reply($client, "format_error\n", $userinput);
3822: }
3823:
3824: return 1;
3825: }
1.246 foxr 3826:
1.248 foxr 3827: ®ister_handler("autoinstcodeformat", \&get_institutional_code_format_handler,
3828: 0,1,0);
1.246 foxr 3829:
3830: #
3831: #
1.234 foxr 3832: #
1.231 foxr 3833: #
3834: #
1.207 foxr 3835: #---------------------------------------------------------------
3836: #
3837: # Getting, decoding and dispatching requests:
3838: #
3839:
3840: #
3841: # Get a Request:
3842: # Gets a Request message from the client. The transaction
3843: # is defined as a 'line' of text. We remove the new line
3844: # from the text line.
1.226 foxr 3845: #
1.211 albertel 3846: sub get_request {
1.207 foxr 3847: my $input = <$client>;
3848: chomp($input);
1.226 foxr 3849:
1.234 foxr 3850: &Debug("get_request: Request = $input\n");
1.207 foxr 3851:
3852: &status('Processing '.$clientname.':'.$input);
3853:
3854: return $input;
3855: }
1.212 foxr 3856: #---------------------------------------------------------------
3857: #
3858: # Process a request. This sub should shrink as each action
3859: # gets farmed out into a separat sub that is registered
3860: # with the dispatch hash.
3861: #
3862: # Parameters:
3863: # user_input - The request received from the client (lonc).
3864: # Returns:
3865: # true to keep processing, false if caller should exit.
3866: #
3867: sub process_request {
3868: my ($userinput) = @_; # Easier for now to break style than to
3869: # fix all the userinput -> user_input.
3870: my $wasenc = 0; # True if request was encrypted.
3871: # ------------------------------------------------------------ See if encrypted
3872: if ($userinput =~ /^enc/) {
3873: $userinput = decipher($userinput);
3874: $wasenc=1;
3875: if(!$userinput) { # Cipher not defined.
1.251 foxr 3876: &Failure($client, "error: Encrypted data without negotated key\n");
1.212 foxr 3877: return 0;
3878: }
3879: }
3880: Debug("process_request: $userinput\n");
3881:
1.213 foxr 3882: #
3883: # The 'correct way' to add a command to lond is now to
3884: # write a sub to execute it and Add it to the command dispatch
3885: # hash via a call to register_handler.. The comments to that
3886: # sub should give you enough to go on to show how to do this
3887: # along with the examples that are building up as this code
3888: # is getting refactored. Until all branches of the
3889: # if/elseif monster below have been factored out into
3890: # separate procesor subs, if the dispatch hash is missing
3891: # the command keyword, we will fall through to the remainder
3892: # of the if/else chain below in order to keep this thing in
3893: # working order throughout the transmogrification.
3894:
3895: my ($command, $tail) = split(/:/, $userinput, 2);
3896: chomp($command);
3897: chomp($tail);
3898: $tail =~ s/(\r)//; # This helps people debugging with e.g. telnet.
1.214 foxr 3899: $command =~ s/(\r)//; # And this too for parameterless commands.
3900: if(!$tail) {
3901: $tail =""; # defined but blank.
3902: }
1.213 foxr 3903:
3904: &Debug("Command received: $command, encoded = $wasenc");
3905:
3906: if(defined $Dispatcher{$command}) {
3907:
3908: my $dispatch_info = $Dispatcher{$command};
3909: my $handler = $$dispatch_info[0];
3910: my $need_encode = $$dispatch_info[1];
3911: my $client_types = $$dispatch_info[2];
3912: Debug("Matched dispatch hash: mustencode: $need_encode "
3913: ."ClientType $client_types");
3914:
3915: # Validate the request:
3916:
3917: my $ok = 1;
3918: my $requesterprivs = 0;
3919: if(&isClient()) {
3920: $requesterprivs |= $CLIENT_OK;
3921: }
3922: if(&isManager()) {
3923: $requesterprivs |= $MANAGER_OK;
3924: }
3925: if($need_encode && (!$wasenc)) {
3926: Debug("Must encode but wasn't: $need_encode $wasenc");
3927: $ok = 0;
3928: }
3929: if(($client_types & $requesterprivs) == 0) {
3930: Debug("Client not privileged to do this operation");
3931: $ok = 0;
3932: }
3933:
3934: if($ok) {
3935: Debug("Dispatching to handler $command $tail");
3936: my $keep_going = &$handler($command, $tail, $client);
3937: return $keep_going;
3938: } else {
3939: Debug("Refusing to dispatch because client did not match requirements");
3940: Failure($client, "refused\n", $userinput);
3941: return 1;
3942: }
3943:
3944: }
3945:
1.215 foxr 3946: #------------------- Commands not yet in spearate handlers. --------------
3947:
1.212 foxr 3948: #------------------------------- is auto-enrollment enabled?
1.246 foxr 3949: if ($userinput =~/^autorun/) {
1.212 foxr 3950: if (isClient) {
3951: my ($cmd,$cdom) = split(/:/,$userinput);
3952: my $outcome = &localenroll::run($cdom);
3953: print $client "$outcome\n";
3954: } else {
3955: print $client "0\n";
3956: }
3957: #------------------------------- get official sections (for auto-enrollment).
1.231 foxr 3958: } elsif ($userinput =~/^autogetsections/) {
1.212 foxr 3959: if (isClient) {
3960: my ($cmd,$coursecode,$cdom)=split(/:/,$userinput);
3961: my @secs = &localenroll::get_sections($coursecode,$cdom);
3962: my $seclist = &escape(join(':',@secs));
3963: print $client "$seclist\n";
3964: } else {
3965: print $client "refused\n";
3966: }
3967: #----------------------- validate owner of new course section (for auto-enrollment).
1.231 foxr 3968: } elsif ($userinput =~/^autonewcourse/) {
1.212 foxr 3969: if (isClient) {
3970: my ($cmd,$inst_course_id,$owner,$cdom)=split(/:/,$userinput);
3971: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom);
3972: print $client "$outcome\n";
3973: } else {
3974: print $client "refused\n";
3975: }
3976: #-------------- validate course section in schedule of classes (for auto-enrollment).
1.231 foxr 3977: } elsif ($userinput =~/^autovalidatecourse/) {
1.212 foxr 3978: if (isClient) {
3979: my ($cmd,$inst_course_id,$cdom)=split(/:/,$userinput);
3980: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
3981: print $client "$outcome\n";
3982: } else {
3983: print $client "refused\n";
3984: }
3985: #--------------------------- create password for new user (for auto-enrollment).
1.231 foxr 3986: } elsif ($userinput =~/^autocreatepassword/) {
1.212 foxr 3987: if (isClient) {
3988: my ($cmd,$authparam,$cdom)=split(/:/,$userinput);
3989: my ($create_passwd,$authchk);
3990: ($authparam,$create_passwd,$authchk) = &localenroll::create_password($authparam,$cdom);
3991: print $client &escape($authparam.':'.$create_passwd.':'.$authchk)."\n";
3992: } else {
3993: print $client "refused\n";
3994: }
3995: #--------------------------- read and remove temporary files (for auto-enrollment).
1.231 foxr 3996: } elsif ($userinput =~/^autoretrieve/) {
1.212 foxr 3997: if (isClient) {
3998: my ($cmd,$filename) = split(/:/,$userinput);
3999: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
4000: if ( (-e $source) && ($filename ne '') ) {
4001: my $reply = '';
4002: if (open(my $fh,$source)) {
4003: while (<$fh>) {
4004: chomp($_);
4005: $_ =~ s/^\s+//g;
4006: $_ =~ s/\s+$//g;
4007: $reply .= $_;
4008: }
4009: close($fh);
4010: print $client &escape($reply)."\n";
4011: # unlink($source);
4012: } else {
4013: print $client "error\n";
4014: }
4015: } else {
4016: print $client "error\n";
4017: }
4018: } else {
4019: print $client "refused\n";
4020: }
1.248 foxr 4021: #--------------------- read and retrieve institutional code format
4022: # (for support form).
1.231 foxr 4023: } elsif ($userinput =~/^autoinstcodeformat/) {
1.212 foxr 4024: if (isClient) {
4025: my $reply;
4026: my($cmd,$cdom,$course) = split(/:/,$userinput);
4027: my @pairs = split/\&/,$course;
4028: my %instcodes = ();
4029: my %codes = ();
4030: my @codetitles = ();
4031: my %cat_titles = ();
4032: my %cat_order = ();
4033: foreach (@pairs) {
4034: my ($key,$value) = split/=/,$_;
4035: $instcodes{&unescape($key)} = &unescape($value);
4036: }
4037: my $formatreply = &localenroll::instcode_format($cdom,\%instcodes,\%codes,\@codetitles,\%cat_titles,\%cat_order);
4038: if ($formatreply eq 'ok') {
4039: my $codes_str = &hash2str(%codes);
4040: my $codetitles_str = &array2str(@codetitles);
4041: my $cat_titles_str = &hash2str(%cat_titles);
4042: my $cat_order_str = &hash2str(%cat_order);
4043: print $client $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'.$cat_order_str."\n";
4044: }
4045: } else {
4046: print $client "refused\n";
4047: }
4048: # ------------------------------------------------------------- unknown command
4049:
4050: } else {
4051: # unknown command
4052: print $client "unknown_cmd\n";
4053: }
4054: # -------------------------------------------------------------------- complete
4055: Debug("process_request - returning 1");
4056: return 1;
4057: }
1.207 foxr 4058: #
4059: # Decipher encoded traffic
4060: # Parameters:
4061: # input - Encoded data.
4062: # Returns:
4063: # Decoded data or undef if encryption key was not yet negotiated.
4064: # Implicit input:
4065: # cipher - This global holds the negotiated encryption key.
4066: #
1.211 albertel 4067: sub decipher {
1.207 foxr 4068: my ($input) = @_;
4069: my $output = '';
1.212 foxr 4070:
4071:
1.207 foxr 4072: if($cipher) {
4073: my($enc, $enclength, $encinput) = split(/:/, $input);
4074: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
4075: $output .=
4076: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
4077: }
4078: return substr($output, 0, $enclength);
4079: } else {
4080: return undef;
4081: }
4082: }
4083:
4084: #
4085: # Register a command processor. This function is invoked to register a sub
4086: # to process a request. Once registered, the ProcessRequest sub can automatically
4087: # dispatch requests to an appropriate sub, and do the top level validity checking
4088: # as well:
4089: # - Is the keyword recognized.
4090: # - Is the proper client type attempting the request.
4091: # - Is the request encrypted if it has to be.
4092: # Parameters:
4093: # $request_name - Name of the request being registered.
4094: # This is the command request that will match
4095: # against the hash keywords to lookup the information
4096: # associated with the dispatch information.
4097: # $procedure - Reference to a sub to call to process the request.
4098: # All subs get called as follows:
4099: # Procedure($cmd, $tail, $replyfd, $key)
4100: # $cmd - the actual keyword that invoked us.
4101: # $tail - the tail of the request that invoked us.
4102: # $replyfd- File descriptor connected to the client
4103: # $must_encode - True if the request must be encoded to be good.
4104: # $client_ok - True if it's ok for a client to request this.
4105: # $manager_ok - True if it's ok for a manager to request this.
4106: # Side effects:
4107: # - On success, the Dispatcher hash has an entry added for the key $RequestName
4108: # - On failure, the program will die as it's a bad internal bug to try to
4109: # register a duplicate command handler.
4110: #
1.211 albertel 4111: sub register_handler {
1.212 foxr 4112: my ($request_name,$procedure,$must_encode, $client_ok,$manager_ok) = @_;
1.207 foxr 4113:
4114: # Don't allow duplication#
4115:
4116: if (defined $Dispatcher{$request_name}) {
4117: die "Attempting to define a duplicate request handler for $request_name\n";
4118: }
4119: # Build the client type mask:
4120:
4121: my $client_type_mask = 0;
4122: if($client_ok) {
4123: $client_type_mask |= $CLIENT_OK;
4124: }
4125: if($manager_ok) {
4126: $client_type_mask |= $MANAGER_OK;
4127: }
4128:
4129: # Enter the hash:
4130:
4131: my @entry = ($procedure, $must_encode, $client_type_mask);
4132:
4133: $Dispatcher{$request_name} = \@entry;
4134:
4135: }
4136:
4137:
4138: #------------------------------------------------------------------
4139:
4140:
4141:
4142:
1.141 foxr 4143: #
1.96 foxr 4144: # Convert an error return code from lcpasswd to a string value.
4145: #
4146: sub lcpasswdstrerror {
4147: my $ErrorCode = shift;
1.97 foxr 4148: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
1.96 foxr 4149: return "lcpasswd Unrecognized error return value ".$ErrorCode;
4150: } else {
1.98 foxr 4151: return $passwderrors[$ErrorCode];
1.96 foxr 4152: }
4153: }
4154:
1.97 foxr 4155: #
4156: # Convert an error return code from lcuseradd to a string value:
4157: #
4158: sub lcuseraddstrerror {
4159: my $ErrorCode = shift;
4160: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
4161: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
4162: } else {
1.98 foxr 4163: return $adderrors[$ErrorCode];
1.97 foxr 4164: }
4165: }
4166:
1.23 harris41 4167: # grabs exception and records it to log before exiting
4168: sub catchexception {
1.27 albertel 4169: my ($error)=@_;
1.25 www 4170: $SIG{'QUIT'}='DEFAULT';
4171: $SIG{__DIE__}='DEFAULT';
1.165 albertel 4172: &status("Catching exception");
1.190 albertel 4173: &logthis("<font color='red'>CRITICAL: "
1.134 albertel 4174: ."ABNORMAL EXIT. Child $$ for server $thisserver died through "
1.27 albertel 4175: ."a crash with this error msg->[$error]</font>");
1.57 www 4176: &logthis('Famous last words: '.$status.' - '.$lastlog);
1.27 albertel 4177: if ($client) { print $client "error: $error\n"; }
1.59 www 4178: $server->close();
1.27 albertel 4179: die($error);
1.23 harris41 4180: }
1.63 www 4181: sub timeout {
1.165 albertel 4182: &status("Handling Timeout");
1.190 albertel 4183: &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
1.63 www 4184: &catchexception('Timeout');
4185: }
1.22 harris41 4186: # -------------------------------- Set signal handlers to record abnormal exits
4187:
1.226 foxr 4188:
1.22 harris41 4189: $SIG{'QUIT'}=\&catchexception;
4190: $SIG{__DIE__}=\&catchexception;
4191:
1.81 matthew 4192: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
1.95 harris41 4193: &status("Read loncapa.conf and loncapa_apache.conf");
4194: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
1.141 foxr 4195: %perlvar=%{$perlvarref};
1.80 harris41 4196: undef $perlvarref;
1.19 www 4197:
1.35 harris41 4198: # ----------------------------- Make sure this process is running from user=www
4199: my $wwwid=getpwnam('www');
4200: if ($wwwid!=$<) {
1.134 albertel 4201: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
4202: my $subj="LON: $currenthostid User ID mismatch";
1.37 harris41 4203: system("echo 'User ID mismatch. lond must be run as user www.' |\
1.35 harris41 4204: mailto $emailto -s '$subj' > /dev/null");
4205: exit 1;
4206: }
4207:
1.19 www 4208: # --------------------------------------------- Check if other instance running
4209:
4210: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
4211:
4212: if (-e $pidfile) {
4213: my $lfh=IO::File->new("$pidfile");
4214: my $pide=<$lfh>;
4215: chomp($pide);
1.29 harris41 4216: if (kill 0 => $pide) { die "already running"; }
1.19 www 4217: }
1.1 albertel 4218:
4219: # ------------------------------------------------------------- Read hosts file
4220:
4221:
4222:
4223: # establish SERVER socket, bind and listen.
4224: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
4225: Type => SOCK_STREAM,
4226: Proto => 'tcp',
4227: Reuse => 1,
4228: Listen => 10 )
1.29 harris41 4229: or die "making socket: $@\n";
1.1 albertel 4230:
4231: # --------------------------------------------------------- Do global variables
4232:
4233: # global variables
4234:
1.134 albertel 4235: my %children = (); # keys are current child process IDs
1.1 albertel 4236:
4237: sub REAPER { # takes care of dead children
4238: $SIG{CHLD} = \&REAPER;
1.165 albertel 4239: &status("Handling child death");
1.178 foxr 4240: my $pid;
4241: do {
4242: $pid = waitpid(-1,&WNOHANG());
4243: if (defined($children{$pid})) {
4244: &logthis("Child $pid died");
4245: delete($children{$pid});
1.183 albertel 4246: } elsif ($pid > 0) {
1.178 foxr 4247: &logthis("Unknown Child $pid died");
4248: }
4249: } while ( $pid > 0 );
4250: foreach my $child (keys(%children)) {
4251: $pid = waitpid($child,&WNOHANG());
4252: if ($pid > 0) {
4253: &logthis("Child $child - $pid looks like we missed it's death");
4254: delete($children{$pid});
4255: }
1.176 albertel 4256: }
1.165 albertel 4257: &status("Finished Handling child death");
1.1 albertel 4258: }
4259:
4260: sub HUNTSMAN { # signal handler for SIGINT
1.165 albertel 4261: &status("Killing children (INT)");
1.1 albertel 4262: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
4263: kill 'INT' => keys %children;
1.59 www 4264: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.1 albertel 4265: my $execdir=$perlvar{'lonDaemons'};
4266: unlink("$execdir/logs/lond.pid");
1.190 albertel 4267: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
1.165 albertel 4268: &status("Done killing children");
1.1 albertel 4269: exit; # clean up with dignity
4270: }
4271:
4272: sub HUPSMAN { # signal handler for SIGHUP
4273: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
1.165 albertel 4274: &status("Killing children for restart (HUP)");
1.1 albertel 4275: kill 'INT' => keys %children;
1.59 www 4276: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.190 albertel 4277: &logthis("<font color='red'>CRITICAL: Restarting</font>");
1.134 albertel 4278: my $execdir=$perlvar{'lonDaemons'};
1.30 harris41 4279: unlink("$execdir/logs/lond.pid");
1.165 albertel 4280: &status("Restarting self (HUP)");
1.1 albertel 4281: exec("$execdir/lond"); # here we go again
4282: }
4283:
1.144 foxr 4284: #
1.148 foxr 4285: # Kill off hashes that describe the host table prior to re-reading it.
4286: # Hashes affected are:
1.200 matthew 4287: # %hostid, %hostdom %hostip %hostdns.
1.148 foxr 4288: #
4289: sub KillHostHashes {
4290: foreach my $key (keys %hostid) {
4291: delete $hostid{$key};
4292: }
4293: foreach my $key (keys %hostdom) {
4294: delete $hostdom{$key};
4295: }
4296: foreach my $key (keys %hostip) {
4297: delete $hostip{$key};
4298: }
1.200 matthew 4299: foreach my $key (keys %hostdns) {
4300: delete $hostdns{$key};
4301: }
1.148 foxr 4302: }
4303: #
4304: # Read in the host table from file and distribute it into the various hashes:
4305: #
4306: # - %hostid - Indexed by IP, the loncapa hostname.
4307: # - %hostdom - Indexed by loncapa hostname, the domain.
4308: # - %hostip - Indexed by hostid, the Ip address of the host.
4309: sub ReadHostTable {
4310:
4311: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
1.200 matthew 4312: my $myloncapaname = $perlvar{'lonHostID'};
4313: Debug("My loncapa name is : $myloncapaname");
1.148 foxr 4314: while (my $configline=<CONFIG>) {
1.178 foxr 4315: if (!($configline =~ /^\s*\#/)) {
4316: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
4317: chomp($ip); $ip=~s/\D+$//;
1.200 matthew 4318: $hostid{$ip}=$id; # LonCAPA name of host by IP.
4319: $hostdom{$id}=$domain; # LonCAPA domain name of host.
4320: $hostip{$id}=$ip; # IP address of host.
4321: $hostdns{$name} = $id; # LonCAPA name of host by DNS.
4322:
4323: if ($id eq $perlvar{'lonHostID'}) {
4324: Debug("Found me in the host table: $name");
4325: $thisserver=$name;
4326: }
1.178 foxr 4327: }
1.148 foxr 4328: }
4329: close(CONFIG);
4330: }
4331: #
4332: # Reload the Apache daemon's state.
1.150 foxr 4333: # This is done by invoking /home/httpd/perl/apachereload
4334: # a setuid perl script that can be root for us to do this job.
1.148 foxr 4335: #
4336: sub ReloadApache {
1.150 foxr 4337: my $execdir = $perlvar{'lonDaemons'};
4338: my $script = $execdir."/apachereload";
4339: system($script);
1.148 foxr 4340: }
4341:
4342: #
1.144 foxr 4343: # Called in response to a USR2 signal.
4344: # - Reread hosts.tab
4345: # - All children connected to hosts that were removed from hosts.tab
4346: # are killed via SIGINT
4347: # - All children connected to previously existing hosts are sent SIGUSR1
4348: # - Our internal hosts hash is updated to reflect the new contents of
4349: # hosts.tab causing connections from hosts added to hosts.tab to
4350: # now be honored.
4351: #
4352: sub UpdateHosts {
1.165 albertel 4353: &status("Reload hosts.tab");
1.147 foxr 4354: logthis('<font color="blue"> Updating connections </font>');
1.148 foxr 4355: #
4356: # The %children hash has the set of IP's we currently have children
4357: # on. These need to be matched against records in the hosts.tab
4358: # Any ip's no longer in the table get killed off they correspond to
4359: # either dropped or changed hosts. Note that the re-read of the table
4360: # will take care of new and changed hosts as connections come into being.
4361:
4362:
4363: KillHostHashes;
4364: ReadHostTable;
4365:
4366: foreach my $child (keys %children) {
4367: my $childip = $children{$child};
4368: if(!$hostid{$childip}) {
1.149 foxr 4369: logthis('<font color="blue"> UpdateHosts killing child '
4370: ." $child for ip $childip </font>");
1.148 foxr 4371: kill('INT', $child);
1.149 foxr 4372: } else {
4373: logthis('<font color="green"> keeping child for ip '
4374: ." $childip (pid=$child) </font>");
1.148 foxr 4375: }
4376: }
4377: ReloadApache;
1.165 albertel 4378: &status("Finished reloading hosts.tab");
1.144 foxr 4379: }
4380:
1.148 foxr 4381:
1.57 www 4382: sub checkchildren {
1.165 albertel 4383: &status("Checking on the children (sending signals)");
1.57 www 4384: &initnewstatus();
4385: &logstatus();
4386: &logthis('Going to check on the children');
1.134 albertel 4387: my $docdir=$perlvar{'lonDocRoot'};
1.61 harris41 4388: foreach (sort keys %children) {
1.221 albertel 4389: #sleep 1;
1.57 www 4390: unless (kill 'USR1' => $_) {
4391: &logthis ('Child '.$_.' is dead');
4392: &logstatus($$.' is dead');
1.221 albertel 4393: delete($children{$_});
1.57 www 4394: }
1.61 harris41 4395: }
1.63 www 4396: sleep 5;
1.212 foxr 4397: $SIG{ALRM} = sub { Debug("timeout");
4398: die "timeout"; };
1.113 albertel 4399: $SIG{__DIE__} = 'DEFAULT';
1.165 albertel 4400: &status("Checking on the children (waiting for reports)");
1.63 www 4401: foreach (sort keys %children) {
4402: unless (-e "$docdir/lon-status/londchld/$_.txt") {
1.113 albertel 4403: eval {
4404: alarm(300);
1.63 www 4405: &logthis('Child '.$_.' did not respond');
1.67 albertel 4406: kill 9 => $_;
1.131 albertel 4407: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
4408: #$subj="LON: $currenthostid killed lond process $_";
4409: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
4410: #$execdir=$perlvar{'lonDaemons'};
4411: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
1.221 albertel 4412: delete($children{$_});
1.113 albertel 4413: alarm(0);
4414: }
1.63 www 4415: }
4416: }
1.113 albertel 4417: $SIG{ALRM} = 'DEFAULT';
1.155 albertel 4418: $SIG{__DIE__} = \&catchexception;
1.165 albertel 4419: &status("Finished checking children");
1.221 albertel 4420: &logthis('Finished Checking children');
1.57 www 4421: }
4422:
1.1 albertel 4423: # --------------------------------------------------------------------- Logging
4424:
4425: sub logthis {
4426: my $message=shift;
4427: my $execdir=$perlvar{'lonDaemons'};
4428: my $fh=IO::File->new(">>$execdir/logs/lond.log");
4429: my $now=time;
4430: my $local=localtime($now);
1.58 www 4431: $lastlog=$local.': '.$message;
1.1 albertel 4432: print $fh "$local ($$): $message\n";
4433: }
4434:
1.77 foxr 4435: # ------------------------- Conditional log if $DEBUG true.
4436: sub Debug {
4437: my $message = shift;
4438: if($DEBUG) {
4439: &logthis($message);
4440: }
4441: }
1.161 foxr 4442:
4443: #
4444: # Sub to do replies to client.. this gives a hook for some
4445: # debug tracing too:
4446: # Parameters:
4447: # fd - File open on client.
4448: # reply - Text to send to client.
4449: # request - Original request from client.
4450: #
4451: sub Reply {
1.192 foxr 4452: my ($fd, $reply, $request) = @_;
1.161 foxr 4453: print $fd $reply;
4454: Debug("Request was $request Reply was $reply");
4455:
1.212 foxr 4456: $Transactions++;
4457:
4458:
4459: }
4460:
4461:
4462: #
4463: # Sub to report a failure.
4464: # This function:
4465: # - Increments the failure statistic counters.
4466: # - Invokes Reply to send the error message to the client.
4467: # Parameters:
4468: # fd - File descriptor open on the client
4469: # reply - Reply text to emit.
4470: # request - The original request message (used by Reply
4471: # to debug if that's enabled.
4472: # Implicit outputs:
4473: # $Failures- The number of failures is incremented.
4474: # Reply (invoked here) sends a message to the
4475: # client:
4476: #
4477: sub Failure {
4478: my $fd = shift;
4479: my $reply = shift;
4480: my $request = shift;
4481:
4482: $Failures++;
4483: Reply($fd, $reply, $request); # That's simple eh?
1.161 foxr 4484: }
1.57 www 4485: # ------------------------------------------------------------------ Log status
4486:
4487: sub logstatus {
1.178 foxr 4488: &status("Doing logging");
4489: my $docdir=$perlvar{'lonDocRoot'};
4490: {
4491: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
1.200 matthew 4492: print $fh $status."\n".$lastlog."\n".time."\n$keymode";
1.178 foxr 4493: $fh->close();
4494: }
1.221 albertel 4495: &status("Finished $$.txt");
4496: {
4497: open(LOG,">>$docdir/lon-status/londstatus.txt");
4498: flock(LOG,LOCK_EX);
4499: print LOG $$."\t".$clientname."\t".$currenthostid."\t"
4500: .$status."\t".$lastlog."\t $keymode\n";
4501: flock(DB,LOCK_UN);
4502: close(LOG);
4503: }
1.178 foxr 4504: &status("Finished logging");
1.57 www 4505: }
4506:
4507: sub initnewstatus {
4508: my $docdir=$perlvar{'lonDocRoot'};
4509: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
4510: my $now=time;
4511: my $local=localtime($now);
4512: print $fh "LOND status $local - parent $$\n\n";
1.64 www 4513: opendir(DIR,"$docdir/lon-status/londchld");
1.134 albertel 4514: while (my $filename=readdir(DIR)) {
1.64 www 4515: unlink("$docdir/lon-status/londchld/$filename");
4516: }
4517: closedir(DIR);
1.57 www 4518: }
4519:
4520: # -------------------------------------------------------------- Status setting
4521:
4522: sub status {
4523: my $what=shift;
4524: my $now=time;
4525: my $local=localtime($now);
1.178 foxr 4526: $status=$local.': '.$what;
4527: $0='lond: '.$what.' '.$local;
1.57 www 4528: }
1.11 www 4529:
4530: # -------------------------------------------------------- Escape Special Chars
4531:
4532: sub escape {
4533: my $str=shift;
4534: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
4535: return $str;
4536: }
4537:
4538: # ----------------------------------------------------- Un-Escape Special Chars
4539:
4540: sub unescape {
4541: my $str=shift;
4542: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
4543: return $str;
4544: }
4545:
1.1 albertel 4546: # ----------------------------------------------------------- Send USR1 to lonc
4547:
4548: sub reconlonc {
4549: my $peerfile=shift;
4550: &logthis("Trying to reconnect for $peerfile");
4551: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
4552: if (my $fh=IO::File->new("$loncfile")) {
4553: my $loncpid=<$fh>;
4554: chomp($loncpid);
4555: if (kill 0 => $loncpid) {
4556: &logthis("lonc at pid $loncpid responding, sending USR1");
4557: kill USR1 => $loncpid;
4558: } else {
1.9 www 4559: &logthis(
1.190 albertel 4560: "<font color='red'>CRITICAL: "
1.9 www 4561: ."lonc at pid $loncpid not responding, giving up</font>");
1.1 albertel 4562: }
4563: } else {
1.190 albertel 4564: &logthis('<font color="red">CRITICAL: lonc not running, giving up</font>');
1.1 albertel 4565: }
4566: }
4567:
4568: # -------------------------------------------------- Non-critical communication
1.11 www 4569:
1.1 albertel 4570: sub subreply {
4571: my ($cmd,$server)=@_;
4572: my $peerfile="$perlvar{'lonSockDir'}/$server";
4573: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
4574: Type => SOCK_STREAM,
4575: Timeout => 10)
4576: or return "con_lost";
4577: print $sclient "$cmd\n";
4578: my $answer=<$sclient>;
4579: chomp($answer);
4580: if (!$answer) { $answer="con_lost"; }
4581: return $answer;
4582: }
4583:
4584: sub reply {
4585: my ($cmd,$server)=@_;
4586: my $answer;
1.115 albertel 4587: if ($server ne $currenthostid) {
1.1 albertel 4588: $answer=subreply($cmd,$server);
4589: if ($answer eq 'con_lost') {
4590: $answer=subreply("ping",$server);
4591: if ($answer ne $server) {
1.115 albertel 4592: &logthis("sub reply: answer != server answer is $answer, server is $server");
1.1 albertel 4593: &reconlonc("$perlvar{'lonSockDir'}/$server");
4594: }
4595: $answer=subreply($cmd,$server);
4596: }
4597: } else {
4598: $answer='self_reply';
4599: }
4600: return $answer;
4601: }
4602:
1.13 www 4603: # -------------------------------------------------------------- Talk to lonsql
4604:
1.234 foxr 4605: sub sql_reply {
1.12 harris41 4606: my ($cmd)=@_;
1.234 foxr 4607: my $answer=&sub_sql_reply($cmd);
4608: if ($answer eq 'con_lost') { $answer=&sub_sql_reply($cmd); }
1.12 harris41 4609: return $answer;
4610: }
4611:
1.234 foxr 4612: sub sub_sql_reply {
1.12 harris41 4613: my ($cmd)=@_;
4614: my $unixsock="mysqlsock";
4615: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
4616: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
4617: Type => SOCK_STREAM,
4618: Timeout => 10)
4619: or return "con_lost";
4620: print $sclient "$cmd\n";
4621: my $answer=<$sclient>;
4622: chomp($answer);
4623: if (!$answer) { $answer="con_lost"; }
4624: return $answer;
4625: }
4626:
1.1 albertel 4627: # -------------------------------------------- Return path to profile directory
1.11 www 4628:
1.1 albertel 4629: sub propath {
4630: my ($udom,$uname)=@_;
4631: $udom=~s/\W//g;
4632: $uname=~s/\W//g;
1.16 www 4633: my $subdir=$uname.'__';
1.1 albertel 4634: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
4635: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
4636: return $proname;
4637: }
4638:
4639: # --------------------------------------- Is this the home server of an author?
1.11 www 4640:
1.1 albertel 4641: sub ishome {
4642: my $author=shift;
4643: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
4644: my ($udom,$uname)=split(/\//,$author);
4645: my $proname=propath($udom,$uname);
4646: if (-e $proname) {
4647: return 'owner';
4648: } else {
4649: return 'not_owner';
4650: }
4651: }
4652:
4653: # ======================================================= Continue main program
4654: # ---------------------------------------------------- Fork once and dissociate
4655:
1.134 albertel 4656: my $fpid=fork;
1.1 albertel 4657: exit if $fpid;
1.29 harris41 4658: die "Couldn't fork: $!" unless defined ($fpid);
1.1 albertel 4659:
1.29 harris41 4660: POSIX::setsid() or die "Can't start new session: $!";
1.1 albertel 4661:
4662: # ------------------------------------------------------- Write our PID on disk
4663:
1.134 albertel 4664: my $execdir=$perlvar{'lonDaemons'};
1.1 albertel 4665: open (PIDSAVE,">$execdir/logs/lond.pid");
4666: print PIDSAVE "$$\n";
4667: close(PIDSAVE);
1.190 albertel 4668: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
1.57 www 4669: &status('Starting');
1.1 albertel 4670:
1.106 foxr 4671:
1.1 albertel 4672:
4673: # ----------------------------------------------------- Install signal handlers
4674:
1.57 www 4675:
1.1 albertel 4676: $SIG{CHLD} = \&REAPER;
4677: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
4678: $SIG{HUP} = \&HUPSMAN;
1.57 www 4679: $SIG{USR1} = \&checkchildren;
1.144 foxr 4680: $SIG{USR2} = \&UpdateHosts;
1.106 foxr 4681:
1.148 foxr 4682: # Read the host hashes:
4683:
4684: ReadHostTable;
1.106 foxr 4685:
4686: # --------------------------------------------------------------
4687: # Accept connections. When a connection comes in, it is validated
4688: # and if good, a child process is created to process transactions
4689: # along the connection.
4690:
1.1 albertel 4691: while (1) {
1.165 albertel 4692: &status('Starting accept');
1.106 foxr 4693: $client = $server->accept() or next;
1.165 albertel 4694: &status('Accepted '.$client.' off to spawn');
1.106 foxr 4695: make_new_child($client);
1.165 albertel 4696: &status('Finished spawning');
1.1 albertel 4697: }
4698:
1.212 foxr 4699: sub make_new_child {
4700: my $pid;
4701: # my $cipher; # Now global
4702: my $sigset;
1.178 foxr 4703:
1.212 foxr 4704: $client = shift;
4705: &status('Starting new child '.$client);
4706: &logthis('<font color="green"> Attempting to start child ('.$client.
4707: ")</font>");
4708: # block signal for fork
4709: $sigset = POSIX::SigSet->new(SIGINT);
4710: sigprocmask(SIG_BLOCK, $sigset)
4711: or die "Can't block SIGINT for fork: $!\n";
1.178 foxr 4712:
1.212 foxr 4713: die "fork: $!" unless defined ($pid = fork);
1.178 foxr 4714:
1.212 foxr 4715: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
4716: # connection liveness.
1.178 foxr 4717:
1.212 foxr 4718: #
4719: # Figure out who we're talking to so we can record the peer in
4720: # the pid hash.
4721: #
4722: my $caller = getpeername($client);
4723: my ($port,$iaddr);
4724: if (defined($caller) && length($caller) > 0) {
4725: ($port,$iaddr)=unpack_sockaddr_in($caller);
4726: } else {
4727: &logthis("Unable to determine who caller was, getpeername returned nothing");
4728: }
4729: if (defined($iaddr)) {
4730: $clientip = inet_ntoa($iaddr);
4731: Debug("Connected with $clientip");
4732: $clientdns = gethostbyaddr($iaddr, AF_INET);
4733: Debug("Connected with $clientdns by name");
4734: } else {
4735: &logthis("Unable to determine clientip");
4736: $clientip='Unavailable';
4737: }
4738:
4739: if ($pid) {
4740: # Parent records the child's birth and returns.
4741: sigprocmask(SIG_UNBLOCK, $sigset)
4742: or die "Can't unblock SIGINT for fork: $!\n";
4743: $children{$pid} = $clientip;
4744: &status('Started child '.$pid);
4745: return;
4746: } else {
4747: # Child can *not* return from this subroutine.
4748: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
4749: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
4750: #don't get intercepted
4751: $SIG{USR1}= \&logstatus;
4752: $SIG{ALRM}= \&timeout;
4753: $lastlog='Forked ';
4754: $status='Forked';
1.178 foxr 4755:
1.212 foxr 4756: # unblock signals
4757: sigprocmask(SIG_UNBLOCK, $sigset)
4758: or die "Can't unblock SIGINT for fork: $!\n";
1.178 foxr 4759:
1.212 foxr 4760: # my $tmpsnum=0; # Now global
4761: #---------------------------------------------------- kerberos 5 initialization
4762: &Authen::Krb5::init_context();
4763: &Authen::Krb5::init_ets();
1.209 albertel 4764:
1.212 foxr 4765: &status('Accepted connection');
4766: # =============================================================================
4767: # do something with the connection
4768: # -----------------------------------------------------------------------------
4769: # see if we know client and 'check' for spoof IP by ineffective challenge
1.178 foxr 4770:
1.212 foxr 4771: ReadManagerTable; # May also be a manager!!
4772:
4773: my $clientrec=($hostid{$clientip} ne undef);
4774: my $ismanager=($managers{$clientip} ne undef);
4775: $clientname = "[unknonwn]";
4776: if($clientrec) { # Establish client type.
4777: $ConnectionType = "client";
4778: $clientname = $hostid{$clientip};
4779: if($ismanager) {
4780: $ConnectionType = "both";
4781: }
4782: } else {
4783: $ConnectionType = "manager";
4784: $clientname = $managers{$clientip};
4785: }
4786: my $clientok;
1.178 foxr 4787:
1.212 foxr 4788: if ($clientrec || $ismanager) {
4789: &status("Waiting for init from $clientip $clientname");
4790: &logthis('<font color="yellow">INFO: Connection, '.
4791: $clientip.
4792: " ($clientname) connection type = $ConnectionType </font>" );
4793: &status("Connecting $clientip ($clientname))");
4794: my $remotereq=<$client>;
4795: chomp($remotereq);
4796: Debug("Got init: $remotereq");
4797: my $inikeyword = split(/:/, $remotereq);
4798: if ($remotereq =~ /^init/) {
4799: &sethost("sethost:$perlvar{'lonHostID'}");
4800: #
4801: # If the remote is attempting a local init... give that a try:
4802: #
4803: my ($i, $inittype) = split(/:/, $remotereq);
1.209 albertel 4804:
1.212 foxr 4805: # If the connection type is ssl, but I didn't get my
4806: # certificate files yet, then I'll drop back to
4807: # insecure (if allowed).
4808:
4809: if($inittype eq "ssl") {
4810: my ($ca, $cert) = lonssl::CertificateFile;
4811: my $kfile = lonssl::KeyFile;
4812: if((!$ca) ||
4813: (!$cert) ||
4814: (!$kfile)) {
4815: $inittype = ""; # This forces insecure attempt.
4816: &logthis("<font color=\"blue\"> Certificates not "
4817: ."installed -- trying insecure auth</font>");
1.224 foxr 4818: } else { # SSL certificates are in place so
1.212 foxr 4819: } # Leave the inittype alone.
4820: }
4821:
4822: if($inittype eq "local") {
4823: my $key = LocalConnection($client, $remotereq);
4824: if($key) {
4825: Debug("Got local key $key");
4826: $clientok = 1;
4827: my $cipherkey = pack("H32", $key);
4828: $cipher = new IDEA($cipherkey);
4829: print $client "ok:local\n";
4830: &logthis('<font color="green"'
4831: . "Successful local authentication </font>");
4832: $keymode = "local"
1.178 foxr 4833: } else {
1.212 foxr 4834: Debug("Failed to get local key");
4835: $clientok = 0;
4836: shutdown($client, 3);
4837: close $client;
1.178 foxr 4838: }
1.212 foxr 4839: } elsif ($inittype eq "ssl") {
4840: my $key = SSLConnection($client);
4841: if ($key) {
4842: $clientok = 1;
4843: my $cipherkey = pack("H32", $key);
4844: $cipher = new IDEA($cipherkey);
4845: &logthis('<font color="green">'
4846: ."Successfull ssl authentication with $clientname </font>");
4847: $keymode = "ssl";
4848:
1.178 foxr 4849: } else {
1.212 foxr 4850: $clientok = 0;
4851: close $client;
1.178 foxr 4852: }
1.212 foxr 4853:
4854: } else {
4855: my $ok = InsecureConnection($client);
4856: if($ok) {
4857: $clientok = 1;
4858: &logthis('<font color="green">'
4859: ."Successful insecure authentication with $clientname </font>");
4860: print $client "ok\n";
4861: $keymode = "insecure";
1.178 foxr 4862: } else {
1.212 foxr 4863: &logthis('<font color="yellow">'
4864: ."Attempted insecure connection disallowed </font>");
4865: close $client;
4866: $clientok = 0;
1.178 foxr 4867:
4868: }
4869: }
1.212 foxr 4870: } else {
4871: &logthis(
4872: "<font color='blue'>WARNING: "
4873: ."$clientip failed to initialize: >$remotereq< </font>");
4874: &status('No init '.$clientip);
4875: }
4876:
4877: } else {
4878: &logthis(
4879: "<font color='blue'>WARNING: Unknown client $clientip</font>");
4880: &status('Hung up on '.$clientip);
4881: }
4882:
4883: if ($clientok) {
4884: # ---------------- New known client connecting, could mean machine online again
4885:
4886: foreach my $id (keys(%hostip)) {
4887: if ($hostip{$id} ne $clientip ||
4888: $hostip{$currenthostid} eq $clientip) {
4889: # no need to try to do recon's to myself
4890: next;
4891: }
4892: &reconlonc("$perlvar{'lonSockDir'}/$id");
4893: }
4894: &logthis("<font color='green'>Established connection: $clientname</font>");
4895: &status('Will listen to '.$clientname);
4896: # ------------------------------------------------------------ Process requests
4897: my $keep_going = 1;
4898: my $user_input;
4899: while(($user_input = get_request) && $keep_going) {
4900: alarm(120);
4901: Debug("Main: Got $user_input\n");
4902: $keep_going = &process_request($user_input);
1.178 foxr 4903: alarm(0);
1.212 foxr 4904: &status('Listening to '.$clientname." ($keymode)");
1.161 foxr 4905: }
1.212 foxr 4906:
1.59 www 4907: # --------------------------------------------- client unknown or fishy, refuse
1.212 foxr 4908: } else {
1.161 foxr 4909: print $client "refused\n";
4910: $client->close();
1.190 albertel 4911: &logthis("<font color='blue'>WARNING: "
1.161 foxr 4912: ."Rejected client $clientip, closing connection</font>");
4913: }
1.212 foxr 4914: }
1.161 foxr 4915:
1.1 albertel 4916: # =============================================================================
1.161 foxr 4917:
1.190 albertel 4918: &logthis("<font color='red'>CRITICAL: "
1.161 foxr 4919: ."Disconnect from $clientip ($clientname)</font>");
4920:
4921:
4922: # this exit is VERY important, otherwise the child will become
4923: # a producer of more and more children, forking yourself into
4924: # process death.
4925: exit;
1.106 foxr 4926:
1.78 foxr 4927: }
4928:
4929:
4930: #
4931: # Checks to see if the input roleput request was to set
4932: # an author role. If so, invokes the lchtmldir script to set
4933: # up a correct public_html
4934: # Parameters:
4935: # request - The request sent to the rolesput subchunk.
4936: # We're looking for /domain/_au
4937: # domain - The domain in which the user is having roles doctored.
4938: # user - Name of the user for which the role is being put.
4939: # authtype - The authentication type associated with the user.
4940: #
1.230 foxr 4941: sub manage_permissions
1.78 foxr 4942: {
1.192 foxr 4943:
4944: my ($request, $domain, $user, $authtype) = @_;
1.78 foxr 4945:
4946: # See if the request is of the form /$domain/_au
4947: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
4948: my $execdir = $perlvar{'lonDaemons'};
4949: my $userhome= "/home/$user" ;
1.134 albertel 4950: &logthis("system $execdir/lchtmldir $userhome $user $authtype");
1.78 foxr 4951: system("$execdir/lchtmldir $userhome $user $authtype");
4952: }
4953: }
1.222 foxr 4954:
4955:
4956: #
4957: # Return the full path of a user password file, whether it exists or not.
4958: # Parameters:
4959: # domain - Domain in which the password file lives.
4960: # user - name of the user.
4961: # Returns:
4962: # Full passwd path:
4963: #
4964: sub password_path {
4965: my ($domain, $user) = @_;
4966:
4967:
4968: my $path = &propath($domain, $user);
4969: $path .= "/passwd";
4970:
4971: return $path;
4972: }
4973:
4974: # Password Filename
4975: # Returns the path to a passwd file given domain and user... only if
4976: # it exists.
4977: # Parameters:
4978: # domain - Domain in which to search.
4979: # user - username.
4980: # Returns:
4981: # - If the password file exists returns its path.
4982: # - If the password file does not exist, returns undefined.
4983: #
4984: sub password_filename {
4985: my ($domain, $user) = @_;
4986:
4987: Debug ("PasswordFilename called: dom = $domain user = $user");
4988:
4989: my $path = &password_path($domain, $user);
4990: Debug("PasswordFilename got path: $path");
4991: if(-e $path) {
4992: return $path;
4993: } else {
4994: return undef;
4995: }
4996: }
4997:
4998: #
4999: # Rewrite the contents of the user's passwd file.
5000: # Parameters:
5001: # domain - domain of the user.
5002: # name - User's name.
5003: # contents - New contents of the file.
5004: # Returns:
5005: # 0 - Failed.
5006: # 1 - Success.
5007: #
5008: sub rewrite_password_file {
5009: my ($domain, $user, $contents) = @_;
5010:
5011: my $file = &password_filename($domain, $user);
5012: if (defined $file) {
5013: my $pf = IO::File->new(">$file");
5014: if($pf) {
5015: print $pf "$contents\n";
5016: return 1;
5017: } else {
5018: return 0;
5019: }
5020: } else {
5021: return 0;
5022: }
5023:
5024: }
5025:
1.78 foxr 5026: #
1.222 foxr 5027: # get_auth_type - Determines the authorization type of a user in a domain.
1.78 foxr 5028:
5029: # Returns the authorization type or nouser if there is no such user.
5030: #
1.222 foxr 5031: sub get_auth_type
1.78 foxr 5032: {
1.192 foxr 5033:
5034: my ($domain, $user) = @_;
1.78 foxr 5035:
1.222 foxr 5036: Debug("get_auth_type( $domain, $user ) \n");
1.78 foxr 5037: my $proname = &propath($domain, $user);
5038: my $passwdfile = "$proname/passwd";
5039: if( -e $passwdfile ) {
5040: my $pf = IO::File->new($passwdfile);
5041: my $realpassword = <$pf>;
5042: chomp($realpassword);
1.79 foxr 5043: Debug("Password info = $realpassword\n");
1.78 foxr 5044: my ($authtype, $contentpwd) = split(/:/, $realpassword);
1.79 foxr 5045: Debug("Authtype = $authtype, content = $contentpwd\n");
1.259 raeburn 5046: return "$authtype:$contentpwd";
1.224 foxr 5047: } else {
1.79 foxr 5048: Debug("Returning nouser");
1.78 foxr 5049: return "nouser";
5050: }
1.1 albertel 5051: }
5052:
1.220 foxr 5053: #
5054: # Validate a user given their domain, name and password. This utility
5055: # function is used by both AuthenticateHandler and ChangePasswordHandler
5056: # to validate the login credentials of a user.
5057: # Parameters:
5058: # $domain - The domain being logged into (this is required due to
5059: # the capability for multihomed systems.
5060: # $user - The name of the user being validated.
5061: # $password - The user's propoposed password.
5062: #
5063: # Returns:
5064: # 1 - The domain,user,pasword triplet corresponds to a valid
5065: # user.
5066: # 0 - The domain,user,password triplet is not a valid user.
5067: #
5068: sub validate_user {
5069: my ($domain, $user, $password) = @_;
5070:
5071:
5072: # Why negative ~pi you may well ask? Well this function is about
5073: # authentication, and therefore very important to get right.
5074: # I've initialized the flag that determines whether or not I've
5075: # validated correctly to a value it's not supposed to get.
5076: # At the end of this function. I'll ensure that it's not still that
5077: # value so we don't just wind up returning some accidental value
5078: # as a result of executing an unforseen code path that
1.249 foxr 5079: # did not set $validated. At the end of valid execution paths,
5080: # validated shoule be 1 for success or 0 for failuer.
1.220 foxr 5081:
5082: my $validated = -3.14159;
5083:
5084: # How we authenticate is determined by the type of authentication
5085: # the user has been assigned. If the authentication type is
5086: # "nouser", the user does not exist so we will return 0.
5087:
1.222 foxr 5088: my $contents = &get_auth_type($domain, $user);
1.220 foxr 5089: my ($howpwd, $contentpwd) = split(/:/, $contents);
5090:
5091: my $null = pack("C",0); # Used by kerberos auth types.
5092:
5093: if ($howpwd ne 'nouser') {
5094:
5095: if($howpwd eq "internal") { # Encrypted is in local password file.
5096: $validated = (crypt($password, $contentpwd) eq $contentpwd);
5097: }
5098: elsif ($howpwd eq "unix") { # User is a normal unix user.
5099: $contentpwd = (getpwnam($user))[1];
5100: if($contentpwd) {
5101: if($contentpwd eq 'x') { # Shadow password file...
5102: my $pwauth_path = "/usr/local/sbin/pwauth";
5103: open PWAUTH, "|$pwauth_path" or
5104: die "Cannot invoke authentication";
5105: print PWAUTH "$user\n$password\n";
5106: close PWAUTH;
5107: $validated = ! $?;
5108:
5109: } else { # Passwords in /etc/passwd.
5110: $validated = (crypt($password,
5111: $contentpwd) eq $contentpwd);
5112: }
5113: } else {
5114: $validated = 0;
5115: }
5116: }
5117: elsif ($howpwd eq "krb4") { # user is in kerberos 4 auth. domain.
5118: if(! ($password =~ /$null/) ) {
5119: my $k4error = &Authen::Krb4::get_pw_in_tkt($user,
5120: "",
5121: $contentpwd,,
5122: 'krbtgt',
5123: $contentpwd,
5124: 1,
5125: $password);
5126: if(!$k4error) {
5127: $validated = 1;
1.224 foxr 5128: } else {
1.220 foxr 5129: $validated = 0;
5130: &logthis('krb4: '.$user.', '.$contentpwd.', '.
5131: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
5132: }
1.224 foxr 5133: } else {
1.220 foxr 5134: $validated = 0; # Password has a match with null.
5135: }
1.224 foxr 5136: } elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain.
1.220 foxr 5137: if(!($password =~ /$null/)) { # Null password not allowed.
5138: my $krbclient = &Authen::Krb5::parse_name($user.'@'
5139: .$contentpwd);
5140: my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd;
5141: my $krbserver = &Authen::Krb5::parse_name($krbservice);
5142: my $credentials= &Authen::Krb5::cc_default();
5143: $credentials->initialize($krbclient);
5144: my $krbreturn = &Authen::KRb5::get_in_tkt_with_password($krbclient,
5145: $krbserver,
5146: $password,
5147: $credentials);
5148: $validated = ($krbreturn == 1);
1.224 foxr 5149: } else {
1.220 foxr 5150: $validated = 0;
5151: }
1.224 foxr 5152: } elsif ($howpwd eq "localauth") {
1.220 foxr 5153: # Authenticate via installation specific authentcation method:
5154: $validated = &localauth::localauth($user,
5155: $password,
5156: $contentpwd);
1.224 foxr 5157: } else { # Unrecognized auth is also bad.
1.220 foxr 5158: $validated = 0;
5159: }
5160: } else {
5161: $validated = 0;
5162: }
5163: #
5164: # $validated has the correct stat of the authentication:
5165: #
5166:
5167: unless ($validated != -3.14159) {
1.249 foxr 5168: # I >really really< want to know if this happens.
5169: # since it indicates that user authentication is badly
5170: # broken in some code path.
5171: #
5172: die "ValidateUser - failed to set the value of validated $domain, $user $password";
1.220 foxr 5173: }
5174: return $validated;
5175: }
5176:
5177:
1.84 albertel 5178: sub addline {
5179: my ($fname,$hostid,$ip,$newline)=@_;
5180: my $contents;
5181: my $found=0;
5182: my $expr='^'.$hostid.':'.$ip.':';
5183: $expr =~ s/\./\\\./g;
1.134 albertel 5184: my $sh;
1.84 albertel 5185: if ($sh=IO::File->new("$fname.subscription")) {
5186: while (my $subline=<$sh>) {
5187: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
5188: }
5189: $sh->close();
5190: }
5191: $sh=IO::File->new(">$fname.subscription");
5192: if ($contents) { print $sh $contents; }
5193: if ($newline) { print $sh $newline; }
5194: $sh->close();
5195: return $found;
1.86 www 5196: }
5197:
1.234 foxr 5198: sub get_chat {
1.122 www 5199: my ($cdom,$cname,$udom,$uname)=@_;
1.87 www 5200: my %hash;
5201: my $proname=&propath($cdom,$cname);
5202: my @entries=();
1.88 albertel 5203: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
5204: &GDBM_READER(),0640)) {
5205: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
5206: untie %hash;
1.123 www 5207: }
1.124 www 5208: my @participants=();
1.134 albertel 5209: my $cutoff=time-60;
1.123 www 5210: if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db",
1.124 www 5211: &GDBM_WRCREAT(),0640)) {
5212: $hash{$uname.':'.$udom}=time;
1.123 www 5213: foreach (sort keys %hash) {
5214: if ($hash{$_}>$cutoff) {
1.124 www 5215: $participants[$#participants+1]='active_participant:'.$_;
1.123 www 5216: }
5217: }
5218: untie %hash;
1.86 www 5219: }
1.124 www 5220: return (@participants,@entries);
1.86 www 5221: }
5222:
1.234 foxr 5223: sub chat_add {
1.88 albertel 5224: my ($cdom,$cname,$newchat)=@_;
5225: my %hash;
5226: my $proname=&propath($cdom,$cname);
5227: my @entries=();
1.142 www 5228: my $time=time;
1.88 albertel 5229: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
5230: &GDBM_WRCREAT(),0640)) {
5231: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
5232: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
5233: my ($thentime,$idnum)=split(/\_/,$lastid);
5234: my $newid=$time.'_000000';
5235: if ($thentime==$time) {
5236: $idnum=~s/^0+//;
5237: $idnum++;
5238: $idnum=substr('000000'.$idnum,-6,6);
5239: $newid=$time.'_'.$idnum;
5240: }
5241: $hash{$newid}=$newchat;
5242: my $expired=$time-3600;
5243: foreach (keys %hash) {
5244: my ($thistime)=($_=~/(\d+)\_/);
5245: if ($thistime<$expired) {
1.89 www 5246: delete $hash{$_};
1.88 albertel 5247: }
5248: }
5249: untie %hash;
1.142 www 5250: }
5251: {
5252: my $hfh;
5253: if ($hfh=IO::File->new(">>$proname/chatroom.log")) {
5254: print $hfh "$time:".&unescape($newchat)."\n";
5255: }
1.86 www 5256: }
1.84 albertel 5257: }
5258:
5259: sub unsub {
5260: my ($fname,$clientip)=@_;
5261: my $result;
1.188 foxr 5262: my $unsubs = 0; # Number of successful unsubscribes:
5263:
5264:
5265: # An old way subscriptions were handled was to have a
5266: # subscription marker file:
5267:
5268: Debug("Attempting unlink of $fname.$clientname");
1.161 foxr 5269: if (unlink("$fname.$clientname")) {
1.188 foxr 5270: $unsubs++; # Successful unsub via marker file.
5271: }
5272:
5273: # The more modern way to do it is to have a subscription list
5274: # file:
5275:
1.84 albertel 5276: if (-e "$fname.subscription") {
1.161 foxr 5277: my $found=&addline($fname,$clientname,$clientip,'');
1.188 foxr 5278: if ($found) {
5279: $unsubs++;
5280: }
5281: }
5282:
5283: # If either or both of these mechanisms succeeded in unsubscribing a
5284: # resource we can return ok:
5285:
5286: if($unsubs) {
5287: $result = "ok\n";
1.84 albertel 5288: } else {
1.188 foxr 5289: $result = "not_subscribed\n";
1.84 albertel 5290: }
1.188 foxr 5291:
1.84 albertel 5292: return $result;
5293: }
5294:
1.101 www 5295: sub currentversion {
5296: my $fname=shift;
5297: my $version=-1;
5298: my $ulsdir='';
5299: if ($fname=~/^(.+)\/[^\/]+$/) {
5300: $ulsdir=$1;
5301: }
1.114 albertel 5302: my ($fnamere1,$fnamere2);
5303: # remove version if already specified
1.101 www 5304: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
1.114 albertel 5305: # get the bits that go before and after the version number
5306: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
5307: $fnamere1=$1;
5308: $fnamere2='.'.$2;
5309: }
1.101 www 5310: if (-e $fname) { $version=1; }
5311: if (-e $ulsdir) {
1.134 albertel 5312: if(-d $ulsdir) {
5313: if (opendir(LSDIR,$ulsdir)) {
5314: my $ulsfn;
5315: while ($ulsfn=readdir(LSDIR)) {
1.101 www 5316: # see if this is a regular file (ignore links produced earlier)
1.134 albertel 5317: my $thisfile=$ulsdir.'/'.$ulsfn;
5318: unless (-l $thisfile) {
1.160 www 5319: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
1.134 albertel 5320: if ($1>$version) { $version=$1; }
5321: }
5322: }
5323: }
5324: closedir(LSDIR);
5325: $version++;
5326: }
5327: }
5328: }
5329: return $version;
1.101 www 5330: }
5331:
5332: sub thisversion {
5333: my $fname=shift;
5334: my $version=-1;
5335: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
5336: $version=$1;
5337: }
5338: return $version;
5339: }
5340:
1.84 albertel 5341: sub subscribe {
5342: my ($userinput,$clientip)=@_;
5343: my $result;
5344: my ($cmd,$fname)=split(/:/,$userinput);
5345: my $ownership=&ishome($fname);
5346: if ($ownership eq 'owner') {
1.101 www 5347: # explitly asking for the current version?
5348: unless (-e $fname) {
5349: my $currentversion=¤tversion($fname);
5350: if (&thisversion($fname)==$currentversion) {
5351: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
5352: my $root=$1;
5353: my $extension=$2;
5354: symlink($root.'.'.$extension,
5355: $root.'.'.$currentversion.'.'.$extension);
1.102 www 5356: unless ($extension=~/\.meta$/) {
5357: symlink($root.'.'.$extension.'.meta',
5358: $root.'.'.$currentversion.'.'.$extension.'.meta');
5359: }
1.101 www 5360: }
5361: }
5362: }
1.84 albertel 5363: if (-e $fname) {
5364: if (-d $fname) {
5365: $result="directory\n";
5366: } else {
1.161 foxr 5367: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
1.134 albertel 5368: my $now=time;
1.161 foxr 5369: my $found=&addline($fname,$clientname,$clientip,
5370: "$clientname:$clientip:$now\n");
1.84 albertel 5371: if ($found) { $result="$fname\n"; }
5372: # if they were subscribed to only meta data, delete that
5373: # subscription, when you subscribe to a file you also get
5374: # the metadata
5375: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
5376: $fname=~s/\/home\/httpd\/html\/res/raw/;
5377: $fname="http://$thisserver/".$fname;
5378: $result="$fname\n";
5379: }
5380: } else {
5381: $result="not_found\n";
5382: }
5383: } else {
5384: $result="rejected\n";
5385: }
5386: return $result;
5387: }
1.91 albertel 5388:
5389: sub make_passwd_file {
1.98 foxr 5390: my ($uname, $umode,$npass,$passfilename)=@_;
1.91 albertel 5391: my $result="ok\n";
5392: if ($umode eq 'krb4' or $umode eq 'krb5') {
5393: {
5394: my $pf = IO::File->new(">$passfilename");
5395: print $pf "$umode:$npass\n";
5396: }
5397: } elsif ($umode eq 'internal') {
5398: my $salt=time;
5399: $salt=substr($salt,6,2);
5400: my $ncpass=crypt($npass,$salt);
5401: {
5402: &Debug("Creating internal auth");
5403: my $pf = IO::File->new(">$passfilename");
5404: print $pf "internal:$ncpass\n";
5405: }
5406: } elsif ($umode eq 'localauth') {
5407: {
5408: my $pf = IO::File->new(">$passfilename");
5409: print $pf "localauth:$npass\n";
5410: }
5411: } elsif ($umode eq 'unix') {
5412: {
1.186 foxr 5413: #
5414: # Don't allow the creation of privileged accounts!!! that would
5415: # be real bad!!!
5416: #
5417: my $uid = getpwnam($uname);
5418: if((defined $uid) && ($uid == 0)) {
5419: &logthis(">>>Attempted to create privilged account blocked");
5420: return "no_priv_account_error\n";
5421: }
5422:
1.223 foxr 5423: my $execpath ="$perlvar{'lonDaemons'}/"."lcuseradd";
1.224 foxr 5424:
5425: my $lc_error_file = $execdir."/tmp/lcuseradd".$$.".status";
1.91 albertel 5426: {
5427: &Debug("Executing external: ".$execpath);
1.98 foxr 5428: &Debug("user = ".$uname.", Password =". $npass);
1.132 matthew 5429: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
1.91 albertel 5430: print $se "$uname\n";
5431: print $se "$npass\n";
5432: print $se "$npass\n";
1.223 foxr 5433: print $se "$lc_error_file\n"; # Status -> unique file.
1.97 foxr 5434: }
1.223 foxr 5435: my $error = IO::File->new("< $lc_error_file");
5436: my $useraddok = <$error>;
5437: $error->close;
5438: unlink($lc_error_file);
5439:
5440: chomp $useraddok;
5441:
1.97 foxr 5442: if($useraddok > 0) {
1.223 foxr 5443: my $error_text = &lcuseraddstrerror($useraddok);
5444: &logthis("Failed lcuseradd: $error_text");
5445: $result = "lcuseradd_failed:$error_text\n";
1.224 foxr 5446: } else {
1.223 foxr 5447: my $pf = IO::File->new(">$passfilename");
5448: print $pf "unix:\n";
1.91 albertel 5449: }
5450: }
5451: } elsif ($umode eq 'none') {
5452: {
1.223 foxr 5453: my $pf = IO::File->new("> $passfilename");
1.91 albertel 5454: print $pf "none:\n";
5455: }
5456: } else {
5457: $result="auth_mode_error\n";
5458: }
5459: return $result;
1.121 albertel 5460: }
5461:
5462: sub sethost {
5463: my ($remotereq) = @_;
5464: my (undef,$hostid)=split(/:/,$remotereq);
5465: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
5466: if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
1.200 matthew 5467: $currenthostid =$hostid;
1.121 albertel 5468: $currentdomainid=$hostdom{$hostid};
5469: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
5470: } else {
5471: &logthis("Requested host id $hostid not an alias of ".
5472: $perlvar{'lonHostID'}." refusing connection");
5473: return 'unable_to_set';
5474: }
5475: return 'ok';
5476: }
5477:
5478: sub version {
5479: my ($userinput)=@_;
5480: $remoteVERSION=(split(/:/,$userinput))[1];
5481: return "version:$VERSION";
1.127 albertel 5482: }
1.178 foxr 5483:
1.128 albertel 5484: #There is a copy of this in lonnet.pm
1.127 albertel 5485: sub userload {
5486: my $numusers=0;
5487: {
5488: opendir(LONIDS,$perlvar{'lonIDsDir'});
5489: my $filename;
5490: my $curtime=time;
5491: while ($filename=readdir(LONIDS)) {
5492: if ($filename eq '.' || $filename eq '..') {next;}
1.138 albertel 5493: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
1.159 albertel 5494: if ($curtime-$mtime < 1800) { $numusers++; }
1.127 albertel 5495: }
5496: closedir(LONIDS);
5497: }
5498: my $userloadpercent=0;
5499: my $maxuserload=$perlvar{'lonUserLoadLim'};
5500: if ($maxuserload) {
1.129 albertel 5501: $userloadpercent=100*$numusers/$maxuserload;
1.127 albertel 5502: }
1.130 albertel 5503: $userloadpercent=sprintf("%.2f",$userloadpercent);
1.127 albertel 5504: return $userloadpercent;
1.91 albertel 5505: }
5506:
1.205 raeburn 5507: # Routines for serializing arrays and hashes (copies from lonnet)
5508:
5509: sub array2str {
5510: my (@array) = @_;
5511: my $result=&arrayref2str(\@array);
5512: $result=~s/^__ARRAY_REF__//;
5513: $result=~s/__END_ARRAY_REF__$//;
5514: return $result;
5515: }
5516:
5517: sub arrayref2str {
5518: my ($arrayref) = @_;
5519: my $result='__ARRAY_REF__';
5520: foreach my $elem (@$arrayref) {
5521: if(ref($elem) eq 'ARRAY') {
5522: $result.=&arrayref2str($elem).'&';
5523: } elsif(ref($elem) eq 'HASH') {
5524: $result.=&hashref2str($elem).'&';
5525: } elsif(ref($elem)) {
5526: #print("Got a ref of ".(ref($elem))." skipping.");
5527: } else {
5528: $result.=&escape($elem).'&';
5529: }
5530: }
5531: $result=~s/\&$//;
5532: $result .= '__END_ARRAY_REF__';
5533: return $result;
5534: }
5535:
5536: sub hash2str {
5537: my (%hash) = @_;
5538: my $result=&hashref2str(\%hash);
5539: $result=~s/^__HASH_REF__//;
5540: $result=~s/__END_HASH_REF__$//;
5541: return $result;
5542: }
5543:
5544: sub hashref2str {
5545: my ($hashref)=@_;
5546: my $result='__HASH_REF__';
5547: foreach (sort(keys(%$hashref))) {
5548: if (ref($_) eq 'ARRAY') {
5549: $result.=&arrayref2str($_).'=';
5550: } elsif (ref($_) eq 'HASH') {
5551: $result.=&hashref2str($_).'=';
5552: } elsif (ref($_)) {
5553: $result.='=';
5554: #print("Got a ref of ".(ref($_))." skipping.");
5555: } else {
5556: if ($_) {$result.=&escape($_).'=';} else { last; }
5557: }
5558:
5559: if(ref($hashref->{$_}) eq 'ARRAY') {
5560: $result.=&arrayref2str($hashref->{$_}).'&';
5561: } elsif(ref($hashref->{$_}) eq 'HASH') {
5562: $result.=&hashref2str($hashref->{$_}).'&';
5563: } elsif(ref($hashref->{$_})) {
5564: $result.='&';
5565: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
5566: } else {
5567: $result.=&escape($hashref->{$_}).'&';
5568: }
5569: }
5570: $result=~s/\&$//;
5571: $result .= '__END_HASH_REF__';
5572: return $result;
5573: }
1.200 matthew 5574:
1.61 harris41 5575: # ----------------------------------- POD (plain old documentation, CPAN style)
5576:
5577: =head1 NAME
5578:
5579: lond - "LON Daemon" Server (port "LOND" 5663)
5580:
5581: =head1 SYNOPSIS
5582:
1.74 harris41 5583: Usage: B<lond>
5584:
5585: Should only be run as user=www. This is a command-line script which
5586: is invoked by B<loncron>. There is no expectation that a typical user
5587: will manually start B<lond> from the command-line. (In other words,
5588: DO NOT START B<lond> YOURSELF.)
1.61 harris41 5589:
5590: =head1 DESCRIPTION
5591:
1.74 harris41 5592: There are two characteristics associated with the running of B<lond>,
5593: PROCESS MANAGEMENT (starting, stopping, handling child processes)
5594: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
5595: subscriptions, etc). These are described in two large
5596: sections below.
5597:
5598: B<PROCESS MANAGEMENT>
5599:
1.61 harris41 5600: Preforker - server who forks first. Runs as a daemon. HUPs.
5601: Uses IDEA encryption
5602:
1.74 harris41 5603: B<lond> forks off children processes that correspond to the other servers
5604: in the network. Management of these processes can be done at the
5605: parent process level or the child process level.
5606:
5607: B<logs/lond.log> is the location of log messages.
5608:
5609: The process management is now explained in terms of linux shell commands,
5610: subroutines internal to this code, and signal assignments:
5611:
5612: =over 4
5613:
5614: =item *
5615:
5616: PID is stored in B<logs/lond.pid>
5617:
5618: This is the process id number of the parent B<lond> process.
5619:
5620: =item *
5621:
5622: SIGTERM and SIGINT
5623:
5624: Parent signal assignment:
5625: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
5626:
5627: Child signal assignment:
5628: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
5629: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
5630: to restart a new child.)
5631:
5632: Command-line invocations:
5633: B<kill> B<-s> SIGTERM I<PID>
5634: B<kill> B<-s> SIGINT I<PID>
5635:
5636: Subroutine B<HUNTSMAN>:
5637: This is only invoked for the B<lond> parent I<PID>.
5638: This kills all the children, and then the parent.
5639: The B<lonc.pid> file is cleared.
5640:
5641: =item *
5642:
5643: SIGHUP
5644:
5645: Current bug:
5646: This signal can only be processed the first time
5647: on the parent process. Subsequent SIGHUP signals
5648: have no effect.
5649:
5650: Parent signal assignment:
5651: $SIG{HUP} = \&HUPSMAN;
5652:
5653: Child signal assignment:
5654: none (nothing happens)
5655:
5656: Command-line invocations:
5657: B<kill> B<-s> SIGHUP I<PID>
5658:
5659: Subroutine B<HUPSMAN>:
5660: This is only invoked for the B<lond> parent I<PID>,
5661: This kills all the children, and then the parent.
5662: The B<lond.pid> file is cleared.
5663:
5664: =item *
5665:
5666: SIGUSR1
5667:
5668: Parent signal assignment:
5669: $SIG{USR1} = \&USRMAN;
5670:
5671: Child signal assignment:
5672: $SIG{USR1}= \&logstatus;
5673:
5674: Command-line invocations:
5675: B<kill> B<-s> SIGUSR1 I<PID>
5676:
5677: Subroutine B<USRMAN>:
5678: When invoked for the B<lond> parent I<PID>,
5679: SIGUSR1 is sent to all the children, and the status of
5680: each connection is logged.
1.144 foxr 5681:
5682: =item *
5683:
5684: SIGUSR2
5685:
5686: Parent Signal assignment:
5687: $SIG{USR2} = \&UpdateHosts
5688:
5689: Child signal assignment:
5690: NONE
5691:
1.74 harris41 5692:
5693: =item *
5694:
5695: SIGCHLD
5696:
5697: Parent signal assignment:
5698: $SIG{CHLD} = \&REAPER;
5699:
5700: Child signal assignment:
5701: none
5702:
5703: Command-line invocations:
5704: B<kill> B<-s> SIGCHLD I<PID>
5705:
5706: Subroutine B<REAPER>:
5707: This is only invoked for the B<lond> parent I<PID>.
5708: Information pertaining to the child is removed.
5709: The socket port is cleaned up.
5710:
5711: =back
5712:
5713: B<SERVER-SIDE ACTIVITIES>
5714:
5715: Server-side information can be accepted in an encrypted or non-encrypted
5716: method.
5717:
5718: =over 4
5719:
5720: =item ping
5721:
5722: Query a client in the hosts.tab table; "Are you there?"
5723:
5724: =item pong
5725:
5726: Respond to a ping query.
5727:
5728: =item ekey
5729:
5730: Read in encrypted key, make cipher. Respond with a buildkey.
5731:
5732: =item load
5733:
5734: Respond with CPU load based on a computation upon /proc/loadavg.
5735:
5736: =item currentauth
5737:
5738: Reply with current authentication information (only over an
5739: encrypted channel).
5740:
5741: =item auth
5742:
5743: Only over an encrypted channel, reply as to whether a user's
5744: authentication information can be validated.
5745:
5746: =item passwd
5747:
5748: Allow for a password to be set.
5749:
5750: =item makeuser
5751:
5752: Make a user.
5753:
5754: =item passwd
5755:
5756: Allow for authentication mechanism and password to be changed.
5757:
5758: =item home
1.61 harris41 5759:
1.74 harris41 5760: Respond to a question "are you the home for a given user?"
5761:
5762: =item update
5763:
5764: Update contents of a subscribed resource.
5765:
5766: =item unsubscribe
5767:
5768: The server is unsubscribing from a resource.
5769:
5770: =item subscribe
5771:
5772: The server is subscribing to a resource.
5773:
5774: =item log
5775:
5776: Place in B<logs/lond.log>
5777:
5778: =item put
5779:
5780: stores hash in namespace
5781:
1.230 foxr 5782: =item rolesputy
1.74 harris41 5783:
5784: put a role into a user's environment
5785:
5786: =item get
5787:
5788: returns hash with keys from array
5789: reference filled in from namespace
5790:
5791: =item eget
5792:
5793: returns hash with keys from array
5794: reference filled in from namesp (encrypts the return communication)
5795:
5796: =item rolesget
5797:
5798: get a role from a user's environment
5799:
5800: =item del
5801:
5802: deletes keys out of array from namespace
5803:
5804: =item keys
5805:
5806: returns namespace keys
5807:
5808: =item dump
5809:
5810: dumps the complete (or key matching regexp) namespace into a hash
5811:
5812: =item store
5813:
5814: stores hash permanently
5815: for this url; hashref needs to be given and should be a \%hashname; the
5816: remaining args aren't required and if they aren't passed or are '' they will
5817: be derived from the ENV
5818:
5819: =item restore
5820:
5821: returns a hash for a given url
5822:
5823: =item querysend
5824:
5825: Tells client about the lonsql process that has been launched in response
5826: to a sent query.
5827:
5828: =item queryreply
5829:
5830: Accept information from lonsql and make appropriate storage in temporary
5831: file space.
5832:
5833: =item idput
5834:
5835: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
5836: for each student, defined perhaps by the institutional Registrar.)
5837:
5838: =item idget
5839:
5840: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
5841: for each student, defined perhaps by the institutional Registrar.)
5842:
5843: =item tmpput
5844:
5845: Accept and store information in temporary space.
5846:
5847: =item tmpget
5848:
5849: Send along temporarily stored information.
5850:
5851: =item ls
5852:
5853: List part of a user's directory.
5854:
1.135 foxr 5855: =item pushtable
5856:
5857: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
5858: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
5859: must be restored manually in case of a problem with the new table file.
5860: pushtable requires that the request be encrypted and validated via
5861: ValidateManager. The form of the command is:
5862: enc:pushtable tablename <tablecontents> \n
5863: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
5864: cleartext newline.
5865:
1.74 harris41 5866: =item Hanging up (exit or init)
5867:
5868: What to do when a client tells the server that they (the client)
5869: are leaving the network.
5870:
5871: =item unknown command
5872:
5873: If B<lond> is sent an unknown command (not in the list above),
5874: it replys to the client "unknown_cmd".
1.135 foxr 5875:
1.74 harris41 5876:
5877: =item UNKNOWN CLIENT
5878:
5879: If the anti-spoofing algorithm cannot verify the client,
5880: the client is rejected (with a "refused" message sent
5881: to the client, and the connection is closed.
5882:
5883: =back
1.61 harris41 5884:
5885: =head1 PREREQUISITES
5886:
5887: IO::Socket
5888: IO::File
5889: Apache::File
5890: Symbol
5891: POSIX
5892: Crypt::IDEA
5893: LWP::UserAgent()
5894: GDBM_File
5895: Authen::Krb4
1.91 albertel 5896: Authen::Krb5
1.61 harris41 5897:
5898: =head1 COREQUISITES
5899:
5900: =head1 OSNAMES
5901:
5902: linux
5903:
5904: =head1 SCRIPT CATEGORIES
5905:
5906: Server/Process
5907:
5908: =cut
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