Annotation of loncom/lond, revision 1.257
1.1 albertel 1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
1.60 www 4: #
1.257 ! raeburn 5: # $Id: lond,v 1.256 2004/09/14 12:08:54 albertel 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:
1.257 ! raeburn 60: my $VERSION='$Revision: 1.256 $'; #' 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: &logthis("Making $path");
! 2100: mkdir($path,0770);
! 2101: }
! 2102: }
1.236 albertel 2103: if (!-e $newdir) {
2104: &Failure($client, "failed\n", "$cmd:$tail");
2105: } else {
2106: &Reply($client, "ok\n", "$cmd:$tail");
2107: }
2108: } else {
2109: &Failure($client, "not_found\n", "$cmd:$tail");
2110: }
2111: } else {
2112: &Failure($client, "not_home\n", "$cmd:$tail");
2113: }
2114: }
2115: return 1;
2116: }
2117: ®ister_handler("mkdiruserfile", \&mkdir_user_file_handler, 0,1,0);
2118:
1.237 albertel 2119: #
2120: # rename a file in a user's home directory userfiles subdirectory.
2121: # Parameters:
2122: # cmd - the Lond request keyword that got us here.
2123: # tail - the part of the command past the keyword.
2124: # client- File descriptor connected with the client.
2125: #
2126: # Returns:
2127: # 1 - Continue processing.
2128:
2129: sub rename_user_file_handler {
2130: my ($cmd, $tail, $client) = @_;
2131:
2132: my ($udom,$uname,$old,$new) = split(/:/, $tail);
2133: $old=&unescape($old);
2134: $new=&unescape($new);
2135: if ($new =~m|/\.\./| || $old =~m|/\.\./|) {
2136: # any files paths with /../ in them refuse to deal with
2137: &Failure($client, "refused\n", "$cmd:$tail");
2138: } else {
2139: my $udir = &propath($udom,$uname);
2140: if (-e $udir) {
2141: my $oldfile=$udir.'/userfiles/'.$old;
2142: my $newfile=$udir.'/userfiles/'.$new;
2143: if (-e $newfile) {
2144: &Failure($client, "exists\n", "$cmd:$tail");
2145: } elsif (! -e $oldfile) {
2146: &Failure($client, "not_found\n", "$cmd:$tail");
2147: } else {
2148: if (!rename($oldfile,$newfile)) {
2149: &Failure($client, "failed\n", "$cmd:$tail");
2150: } else {
2151: &Reply($client, "ok\n", "$cmd:$tail");
2152: }
2153: }
2154: } else {
2155: &Failure($client, "not_home\n", "$cmd:$tail");
2156: }
2157: }
2158: return 1;
2159: }
2160: ®ister_handler("renameuserfile", \&rename_user_file_handler, 0,1,0);
2161:
1.227 foxr 2162:
2163: #
2164: # Authenticate access to a user file by checking the user's
2165: # session token(?)
2166: #
2167: # Parameters:
2168: # cmd - The request keyword that dispatched to tus.
2169: # tail - The tail of the request (colon separated parameters).
2170: # client - Filehandle open on the client.
2171: # Return:
2172: # 1.
2173:
2174: sub token_auth_user_file_handler {
2175: my ($cmd, $tail, $client) = @_;
2176:
2177: my ($fname, $session) = split(/:/, $tail);
2178:
2179: chomp($session);
1.251 foxr 2180: my $reply="non_auth\n";
1.227 foxr 2181: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
2182: $session.'.id')) {
2183: while (my $line=<ENVIN>) {
1.251 foxr 2184: if ($line=~ m|userfile\.\Q$fname\E\=|) { $reply="ok\n"; }
1.227 foxr 2185: }
2186: close(ENVIN);
1.251 foxr 2187: &Reply($client, $reply, "$cmd:$tail");
1.227 foxr 2188: } else {
2189: &Failure($client, "invalid_token\n", "$cmd:$tail");
2190: }
2191: return 1;
2192:
2193: }
2194:
2195: ®ister_handler("tokenauthuserfile", \&token_auth_user_file_handler, 0,1,0);
1.229 foxr 2196:
2197:
2198: #
2199: # Unsubscribe from a resource.
2200: #
2201: # Parameters:
2202: # $cmd - The command that got us here.
2203: # $tail - Tail of the command (remaining parameters).
2204: # $client - File descriptor connected to client.
2205: # Returns
2206: # 0 - Requested to exit, caller should shut down.
2207: # 1 - Continue processing.
2208: #
2209: sub unsubscribe_handler {
2210: my ($cmd, $tail, $client) = @_;
2211:
2212: my $userinput= "$cmd:$tail";
2213:
2214: my ($fname) = split(/:/,$tail); # Split in case there's extrs.
2215:
2216: &Debug("Unsubscribing $fname");
2217: if (-e $fname) {
2218: &Debug("Exists");
2219: &Reply($client, &unsub($fname,$clientip), $userinput);
2220: } else {
2221: &Failure($client, "not_found\n", $userinput);
2222: }
2223: return 1;
2224: }
2225: ®ister_handler("unsub", \&unsubscribe_handler, 0, 1, 0);
1.230 foxr 2226: # Subscribe to a resource
2227: #
2228: # Parameters:
2229: # $cmd - The command that got us here.
2230: # $tail - Tail of the command (remaining parameters).
2231: # $client - File descriptor connected to client.
2232: # Returns
2233: # 0 - Requested to exit, caller should shut down.
2234: # 1 - Continue processing.
2235: #
2236: sub subscribe_handler {
2237: my ($cmd, $tail, $client)= @_;
2238:
2239: my $userinput = "$cmd:$tail";
2240:
2241: &Reply( $client, &subscribe($userinput,$clientip), $userinput);
2242:
2243: return 1;
2244: }
2245: ®ister_handler("sub", \&subscribe_handler, 0, 1, 0);
2246:
2247: #
2248: # Determine the version of a resource (?) Or is it return
2249: # the top version of the resource? Not yet clear from the
2250: # code in currentversion.
2251: #
2252: # Parameters:
2253: # $cmd - The command that got us here.
2254: # $tail - Tail of the command (remaining parameters).
2255: # $client - File descriptor connected to client.
2256: # Returns
2257: # 0 - Requested to exit, caller should shut down.
2258: # 1 - Continue processing.
2259: #
2260: sub current_version_handler {
2261: my ($cmd, $tail, $client) = @_;
2262:
2263: my $userinput= "$cmd:$tail";
2264:
2265: my $fname = $tail;
2266: &Reply( $client, ¤tversion($fname)."\n", $userinput);
2267: return 1;
2268:
2269: }
2270: ®ister_handler("currentversion", \¤t_version_handler, 0, 1, 0);
2271:
2272: # Make an entry in a user's activity log.
2273: #
2274: # Parameters:
2275: # $cmd - The command that got us here.
2276: # $tail - Tail of the command (remaining parameters).
2277: # $client - File descriptor connected to client.
2278: # Returns
2279: # 0 - Requested to exit, caller should shut down.
2280: # 1 - Continue processing.
2281: #
2282: sub activity_log_handler {
2283: my ($cmd, $tail, $client) = @_;
2284:
2285:
2286: my $userinput= "$cmd:$tail";
2287:
2288: my ($udom,$uname,$what)=split(/:/,$tail);
2289: chomp($what);
2290: my $proname=&propath($udom,$uname);
2291: my $now=time;
2292: my $hfh;
2293: if ($hfh=IO::File->new(">>$proname/activity.log")) {
2294: print $hfh "$now:$clientname:$what\n";
2295: &Reply( $client, "ok\n", $userinput);
2296: } else {
2297: &Failure($client, "error: ".($!+0)." IO::File->new Failed "
2298: ."while attempting log\n",
2299: $userinput);
2300: }
2301:
2302: return 1;
2303: }
2304: register_handler("log", \&activity_log_handler, 0, 1, 0);
2305:
2306: #
2307: # Put a namespace entry in a user profile hash.
2308: # My druthers would be for this to be an encrypted interaction too.
2309: # anything that might be an inadvertent covert channel about either
2310: # user authentication or user personal information....
2311: #
2312: # Parameters:
2313: # $cmd - The command that got us here.
2314: # $tail - Tail of the command (remaining parameters).
2315: # $client - File descriptor connected to client.
2316: # Returns
2317: # 0 - Requested to exit, caller should shut down.
2318: # 1 - Continue processing.
2319: #
2320: sub put_user_profile_entry {
2321: my ($cmd, $tail, $client) = @_;
1.229 foxr 2322:
1.230 foxr 2323: my $userinput = "$cmd:$tail";
2324:
1.242 raeburn 2325: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
1.230 foxr 2326: if ($namespace ne 'roles') {
2327: chomp($what);
2328: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2329: &GDBM_WRCREAT(),"P",$what);
2330: if($hashref) {
2331: my @pairs=split(/\&/,$what);
2332: foreach my $pair (@pairs) {
2333: my ($key,$value)=split(/=/,$pair);
2334: $hashref->{$key}=$value;
2335: }
2336: if (untie(%$hashref)) {
2337: &Reply( $client, "ok\n", $userinput);
2338: } else {
2339: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2340: "while attempting put\n",
2341: $userinput);
2342: }
2343: } else {
2344: &Failure( $client, "error: ".($!)." tie(GDBM) Failed ".
2345: "while attempting put\n", $userinput);
2346: }
2347: } else {
2348: &Failure( $client, "refused\n", $userinput);
2349: }
2350:
2351: return 1;
2352: }
2353: ®ister_handler("put", \&put_user_profile_entry, 0, 1, 0);
2354:
2355: #
2356: # Increment a profile entry in the user history file.
2357: # The history contains keyword value pairs. In this case,
2358: # The value itself is a pair of numbers. The first, the current value
2359: # the second an increment that this function applies to the current
2360: # value.
2361: #
2362: # Parameters:
2363: # $cmd - The command that got us here.
2364: # $tail - Tail of the command (remaining parameters).
2365: # $client - File descriptor connected to client.
2366: # Returns
2367: # 0 - Requested to exit, caller should shut down.
2368: # 1 - Continue processing.
2369: #
2370: sub increment_user_value_handler {
2371: my ($cmd, $tail, $client) = @_;
2372:
2373: my $userinput = "$cmd:$tail";
2374:
2375: my ($udom,$uname,$namespace,$what) =split(/:/,$tail);
2376: if ($namespace ne 'roles') {
2377: chomp($what);
2378: my $hashref = &tie_user_hash($udom, $uname,
2379: $namespace, &GDBM_WRCREAT(),
2380: "P",$what);
2381: if ($hashref) {
2382: my @pairs=split(/\&/,$what);
2383: foreach my $pair (@pairs) {
2384: my ($key,$value)=split(/=/,$pair);
2385: # We could check that we have a number...
2386: if (! defined($value) || $value eq '') {
2387: $value = 1;
2388: }
2389: $hashref->{$key}+=$value;
2390: }
2391: if (untie(%$hashref)) {
2392: &Reply( $client, "ok\n", $userinput);
2393: } else {
2394: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2395: "while attempting inc\n", $userinput);
2396: }
2397: } else {
2398: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2399: "while attempting inc\n", $userinput);
2400: }
2401: } else {
2402: &Failure($client, "refused\n", $userinput);
2403: }
2404:
2405: return 1;
2406: }
2407: ®ister_handler("inc", \&increment_user_value_handler, 0, 1, 0);
2408:
2409:
2410: #
2411: # Put a new role for a user. Roles are LonCAPA's packaging of permissions.
2412: # Each 'role' a user has implies a set of permissions. Adding a new role
2413: # for a person grants the permissions packaged with that role
2414: # to that user when the role is selected.
2415: #
2416: # Parameters:
2417: # $cmd - The command string (rolesput).
2418: # $tail - The remainder of the request line. For rolesput this
2419: # consists of a colon separated list that contains:
2420: # The domain and user that is granting the role (logged).
2421: # The domain and user that is getting the role.
2422: # The roles being granted as a set of & separated pairs.
2423: # each pair a key value pair.
2424: # $client - File descriptor connected to the client.
2425: # Returns:
2426: # 0 - If the daemon should exit
2427: # 1 - To continue processing.
2428: #
2429: #
2430: sub roles_put_handler {
2431: my ($cmd, $tail, $client) = @_;
2432:
2433: my $userinput = "$cmd:$tail";
2434:
2435: my ( $exedom, $exeuser, $udom, $uname, $what) = split(/:/,$tail);
2436:
2437:
2438: my $namespace='roles';
2439: chomp($what);
2440: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2441: &GDBM_WRCREAT(), "P",
2442: "$exedom:$exeuser:$what");
2443: #
2444: # Log the attempt to set a role. The {}'s here ensure that the file
2445: # handle is open for the minimal amount of time. Since the flush
2446: # is done on close this improves the chances the log will be an un-
2447: # corrupted ordered thing.
2448: if ($hashref) {
2449: my @pairs=split(/\&/,$what);
2450: foreach my $pair (@pairs) {
2451: my ($key,$value)=split(/=/,$pair);
2452: &manage_permissions($key, $udom, $uname,
2453: &get_auth_type( $udom, $uname));
2454: $hashref->{$key}=$value;
2455: }
2456: if (untie($hashref)) {
2457: &Reply($client, "ok\n", $userinput);
2458: } else {
2459: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2460: "while attempting rolesput\n", $userinput);
2461: }
2462: } else {
2463: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2464: "while attempting rolesput\n", $userinput);
2465: }
2466: return 1;
2467: }
2468: ®ister_handler("rolesput", \&roles_put_handler, 1,1,0); # Encoded client only.
2469:
2470: #
1.231 foxr 2471: # Deletes (removes) a role for a user. This is equivalent to removing
2472: # a permissions package associated with the role from the user's profile.
2473: #
2474: # Parameters:
2475: # $cmd - The command (rolesdel)
2476: # $tail - The remainder of the request line. This consists
2477: # of:
2478: # The domain and user requesting the change (logged)
2479: # The domain and user being changed.
2480: # The roles being revoked. These are shipped to us
2481: # as a bunch of & separated role name keywords.
2482: # $client - The file handle open on the client.
2483: # Returns:
2484: # 1 - Continue processing
2485: # 0 - Exit.
2486: #
2487: sub roles_delete_handler {
2488: my ($cmd, $tail, $client) = @_;
2489:
2490: my $userinput = "$cmd:$tail";
2491:
2492: my ($exedom,$exeuser,$udom,$uname,$what)=split(/:/,$tail);
2493: &Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom.
2494: "what = ".$what);
2495: my $namespace='roles';
2496: chomp($what);
2497: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2498: &GDBM_WRCREAT(), "D",
2499: "$exedom:$exeuser:$what");
2500:
2501: if ($hashref) {
2502: my @rolekeys=split(/\&/,$what);
2503:
2504: foreach my $key (@rolekeys) {
2505: delete $hashref->{$key};
2506: }
2507: if (untie(%$hashref)) {
2508: &Reply($client, "ok\n", $userinput);
2509: } else {
2510: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2511: "while attempting rolesdel\n", $userinput);
2512: }
2513: } else {
2514: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2515: "while attempting rolesdel\n", $userinput);
2516: }
2517:
2518: return 1;
2519: }
2520: ®ister_handler("rolesdel", \&roles_delete_handler, 1,1, 0); # Encoded client only
2521:
2522: # Unencrypted get from a user's profile database. See
2523: # GetProfileEntryEncrypted for a version that does end-to-end encryption.
2524: # This function retrieves a keyed item from a specific named database in the
2525: # user's directory.
2526: #
2527: # Parameters:
2528: # $cmd - Command request keyword (get).
2529: # $tail - Tail of the command. This is a colon separated list
2530: # consisting of the domain and username that uniquely
2531: # identifies the profile,
2532: # The 'namespace' which selects the gdbm file to
2533: # do the lookup in,
2534: # & separated list of keys to lookup. Note that
2535: # the values are returned as an & separated list too.
2536: # $client - File descriptor open on the client.
2537: # Returns:
2538: # 1 - Continue processing.
2539: # 0 - Exit.
2540: #
2541: sub get_profile_entry {
2542: my ($cmd, $tail, $client) = @_;
2543:
2544: my $userinput= "$cmd:$tail";
2545:
2546: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2547: chomp($what);
1.255 foxr 2548:
2549: my $replystring = read_profile($udom, $uname, $namespace, $what);
2550: my ($first) = split(/:/,$replystring);
2551: if($first ne "error") {
2552: &Reply($client, "$replystring\n", $userinput);
1.231 foxr 2553: } else {
1.255 foxr 2554: &Failure($client, $replystring." while attempting get\n", $userinput);
1.231 foxr 2555: }
2556: return 1;
1.255 foxr 2557:
2558:
1.231 foxr 2559: }
2560: ®ister_handler("get", \&get_profile_entry, 0,1,0);
2561:
2562: #
2563: # Process the encrypted get request. Note that the request is sent
2564: # in clear, but the reply is encrypted. This is a small covert channel:
2565: # information about the sensitive keys is given to the snooper. Just not
2566: # information about the values of the sensitive key. Hmm if I wanted to
2567: # know these I'd snoop for the egets. Get the profile item names from them
2568: # and then issue a get for them since there's no enforcement of the
2569: # requirement of an encrypted get for particular profile items. If I
2570: # were re-doing this, I'd force the request to be encrypted as well as the
2571: # reply. I'd also just enforce encrypted transactions for all gets since
2572: # that would prevent any covert channel snooping.
2573: #
2574: # Parameters:
2575: # $cmd - Command keyword of request (eget).
2576: # $tail - Tail of the command. See GetProfileEntry
# for more information about this.
2577: # $client - File open on the client.
2578: # Returns:
2579: # 1 - Continue processing
2580: # 0 - server should exit.
2581: sub get_profile_entry_encrypted {
2582: my ($cmd, $tail, $client) = @_;
2583:
2584: my $userinput = "$cmd:$tail";
2585:
2586: my ($cmd,$udom,$uname,$namespace,$what) = split(/:/,$userinput);
2587: chomp($what);
1.255 foxr 2588: my $qresult = read_profile($udom, $uname, $namespace, $what);
2589: my ($first) = split(/:/, $qresult);
2590: if($first ne "error") {
2591:
2592: if ($cipher) {
2593: my $cmdlength=length($qresult);
2594: $qresult.=" ";
2595: my $encqresult='';
2596: for(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
2597: $encqresult.= unpack("H16",
2598: $cipher->encrypt(substr($qresult,
2599: $encidx,
2600: 8)));
2601: }
2602: &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput);
2603: } else {
1.231 foxr 2604: &Failure( $client, "error:no_key\n", $userinput);
2605: }
2606: } else {
1.255 foxr 2607: &Failure($client, "$qresult while attempting eget\n", $userinput);
2608:
1.231 foxr 2609: }
2610:
2611: return 1;
2612: }
1.255 foxr 2613: ®ister_handler("eget", \&get_profile_entry_encrypted, 0, 1, 0);
1.231 foxr 2614: #
2615: # Deletes a key in a user profile database.
2616: #
2617: # Parameters:
2618: # $cmd - Command keyword (del).
2619: # $tail - Command tail. IN this case a colon
2620: # separated list containing:
2621: # The domain and user that identifies uniquely
2622: # the identity of the user.
2623: # The profile namespace (name of the profile
2624: # database file).
2625: # & separated list of keywords to delete.
2626: # $client - File open on client socket.
2627: # Returns:
2628: # 1 - Continue processing
2629: # 0 - Exit server.
2630: #
2631: #
2632:
2633: sub delete_profile_entry {
2634: my ($cmd, $tail, $client) = @_;
2635:
2636: my $userinput = "cmd:$tail";
2637:
2638: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2639: chomp($what);
2640: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2641: &GDBM_WRCREAT(),
2642: "D",$what);
2643: if ($hashref) {
2644: my @keys=split(/\&/,$what);
2645: foreach my $key (@keys) {
2646: delete($hashref->{$key});
2647: }
2648: if (untie(%$hashref)) {
2649: &Reply($client, "ok\n", $userinput);
2650: } else {
2651: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2652: "while attempting del\n", $userinput);
2653: }
2654: } else {
2655: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2656: "while attempting del\n", $userinput);
2657: }
2658: return 1;
2659: }
2660: ®ister_handler("del", \&delete_profile_entry, 0, 1, 0);
2661: #
2662: # List the set of keys that are defined in a profile database file.
2663: # A successful reply from this will contain an & separated list of
2664: # the keys.
2665: # Parameters:
2666: # $cmd - Command request (keys).
2667: # $tail - Remainder of the request, a colon separated
2668: # list containing domain/user that identifies the
2669: # user being queried, and the database namespace
2670: # (database filename essentially).
2671: # $client - File open on the client.
2672: # Returns:
2673: # 1 - Continue processing.
2674: # 0 - Exit the server.
2675: #
2676: sub get_profile_keys {
2677: my ($cmd, $tail, $client) = @_;
2678:
2679: my $userinput = "$cmd:$tail";
2680:
2681: my ($udom,$uname,$namespace)=split(/:/,$tail);
2682: my $qresult='';
2683: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2684: &GDBM_READER());
2685: if ($hashref) {
2686: foreach my $key (keys %$hashref) {
2687: $qresult.="$key&";
2688: }
2689: if (untie(%$hashref)) {
2690: $qresult=~s/\&$//;
2691: &Reply($client, "$qresult\n", $userinput);
2692: } else {
2693: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2694: "while attempting keys\n", $userinput);
2695: }
2696: } else {
2697: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2698: "while attempting keys\n", $userinput);
2699: }
2700:
2701: return 1;
2702: }
2703: ®ister_handler("keys", \&get_profile_keys, 0, 1, 0);
2704:
2705: #
2706: # Dump the contents of a user profile database.
2707: # Note that this constitutes a very large covert channel too since
2708: # the dump will return sensitive information that is not encrypted.
2709: # The naive security assumption is that the session negotiation ensures
2710: # our client is trusted and I don't believe that's assured at present.
2711: # Sure want badly to go to ssl or tls. Of course if my peer isn't really
2712: # a LonCAPA node they could have negotiated an encryption key too so >sigh<.
2713: #
2714: # Parameters:
2715: # $cmd - The command request keyword (currentdump).
2716: # $tail - Remainder of the request, consisting of a colon
2717: # separated list that has the domain/username and
2718: # the namespace to dump (database file).
2719: # $client - file open on the remote client.
2720: # Returns:
2721: # 1 - Continue processing.
2722: # 0 - Exit the server.
2723: #
2724: sub dump_profile_database {
2725: my ($cmd, $tail, $client) = @_;
2726:
2727: my $userinput = "$cmd:$tail";
2728:
2729: my ($udom,$uname,$namespace) = split(/:/,$tail);
2730: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2731: &GDBM_READER());
2732: if ($hashref) {
2733: # Structure of %data:
2734: # $data{$symb}->{$parameter}=$value;
2735: # $data{$symb}->{'v.'.$parameter}=$version;
2736: # since $parameter will be unescaped, we do not
2737: # have to worry about silly parameter names...
2738:
2739: my $qresult='';
2740: my %data = (); # A hash of anonymous hashes..
2741: while (my ($key,$value) = each(%$hashref)) {
2742: my ($v,$symb,$param) = split(/:/,$key);
2743: next if ($v eq 'version' || $symb eq 'keys');
2744: next if (exists($data{$symb}) &&
2745: exists($data{$symb}->{$param}) &&
2746: $data{$symb}->{'v.'.$param} > $v);
2747: $data{$symb}->{$param}=$value;
2748: $data{$symb}->{'v.'.$param}=$v;
2749: }
2750: if (untie(%$hashref)) {
2751: while (my ($symb,$param_hash) = each(%data)) {
2752: while(my ($param,$value) = each (%$param_hash)){
2753: next if ($param =~ /^v\./); # Ignore versions...
2754: #
2755: # Just dump the symb=value pairs separated by &
2756: #
2757: $qresult.=$symb.':'.$param.'='.$value.'&';
2758: }
2759: }
2760: chop($qresult);
2761: &Reply($client , "$qresult\n", $userinput);
2762: } else {
2763: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2764: "while attempting currentdump\n", $userinput);
2765: }
2766: } else {
2767: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2768: "while attempting currentdump\n", $userinput);
2769: }
2770:
2771: return 1;
2772: }
2773: ®ister_handler("currentdump", \&dump_profile_database, 0, 1, 0);
2774:
2775: #
2776: # Dump a profile database with an optional regular expression
2777: # to match against the keys. In this dump, no effort is made
2778: # to separate symb from version information. Presumably the
2779: # databases that are dumped by this command are of a different
2780: # structure. Need to look at this and improve the documentation of
2781: # both this and the currentdump handler.
2782: # Parameters:
2783: # $cmd - The command keyword.
2784: # $tail - All of the characters after the $cmd:
2785: # These are expected to be a colon
2786: # separated list containing:
2787: # domain/user - identifying the user.
2788: # namespace - identifying the database.
2789: # regexp - optional regular expression
2790: # that is matched against
2791: # database keywords to do
2792: # selective dumps.
2793: # $client - Channel open on the client.
2794: # Returns:
2795: # 1 - Continue processing.
2796: # Side effects:
2797: # response is written to $client.
2798: #
2799: sub dump_with_regexp {
2800: my ($cmd, $tail, $client) = @_;
2801:
2802:
2803: my $userinput = "$cmd:$tail";
2804:
2805: my ($udom,$uname,$namespace,$regexp)=split(/:/,$tail);
2806: if (defined($regexp)) {
2807: $regexp=&unescape($regexp);
2808: } else {
2809: $regexp='.';
2810: }
2811: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2812: &GDBM_READER());
2813: if ($hashref) {
2814: my $qresult='';
2815: while (my ($key,$value) = each(%$hashref)) {
2816: if ($regexp eq '.') {
2817: $qresult.=$key.'='.$value.'&';
2818: } else {
2819: my $unescapeKey = &unescape($key);
2820: if (eval('$unescapeKey=~/$regexp/')) {
2821: $qresult.="$key=$value&";
2822: }
2823: }
2824: }
2825: if (untie(%$hashref)) {
2826: chop($qresult);
2827: &Reply($client, "$qresult\n", $userinput);
2828: } else {
2829: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2830: "while attempting dump\n", $userinput);
2831: }
2832: } else {
2833: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2834: "while attempting dump\n", $userinput);
2835: }
2836:
2837: return 1;
2838: }
2839:
2840: ®ister_handler("dump", \&dump_with_regexp, 0, 1, 0);
2841:
2842: # Store a set of key=value pairs associated with a versioned name.
2843: #
2844: # Parameters:
2845: # $cmd - Request command keyword.
2846: # $tail - Tail of the request. This is a colon
2847: # separated list containing:
2848: # domain/user - User and authentication domain.
2849: # namespace - Name of the database being modified
2850: # rid - Resource keyword to modify.
2851: # what - new value associated with rid.
2852: #
2853: # $client - Socket open on the client.
2854: #
2855: #
2856: # Returns:
2857: # 1 (keep on processing).
2858: # Side-Effects:
2859: # Writes to the client
2860: sub store_handler {
2861: my ($cmd, $tail, $client) = @_;
2862:
2863: my $userinput = "$cmd:$tail";
2864:
2865: my ($udom,$uname,$namespace,$rid,$what) =split(/:/,$tail);
2866: if ($namespace ne 'roles') {
2867:
2868: chomp($what);
2869: my @pairs=split(/\&/,$what);
2870: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2871: &GDBM_WRCREAT(), "P",
2872: "$rid:$what");
2873: if ($hashref) {
2874: my $now = time;
2875: my @previouskeys=split(/&/,$hashref->{"keys:$rid"});
2876: my $key;
2877: $hashref->{"version:$rid"}++;
2878: my $version=$hashref->{"version:$rid"};
2879: my $allkeys='';
2880: foreach my $pair (@pairs) {
2881: my ($key,$value)=split(/=/,$pair);
2882: $allkeys.=$key.':';
2883: $hashref->{"$version:$rid:$key"}=$value;
2884: }
2885: $hashref->{"$version:$rid:timestamp"}=$now;
2886: $allkeys.='timestamp';
2887: $hashref->{"$version:keys:$rid"}=$allkeys;
2888: if (untie($hashref)) {
2889: &Reply($client, "ok\n", $userinput);
2890: } else {
2891: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2892: "while attempting store\n", $userinput);
2893: }
2894: } else {
2895: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2896: "while attempting store\n", $userinput);
2897: }
2898: } else {
2899: &Failure($client, "refused\n", $userinput);
2900: }
2901:
2902: return 1;
2903: }
2904: ®ister_handler("store", \&store_handler, 0, 1, 0);
2905: #
2906: # Dump out all versions of a resource that has key=value pairs associated
2907: # with it for each version. These resources are built up via the store
2908: # command.
2909: #
2910: # Parameters:
2911: # $cmd - Command keyword.
2912: # $tail - Remainder of the request which consists of:
2913: # domain/user - User and auth. domain.
2914: # namespace - name of resource database.
2915: # rid - Resource id.
2916: # $client - socket open on the client.
2917: #
2918: # Returns:
2919: # 1 indicating the caller should not yet exit.
2920: # Side-effects:
2921: # Writes a reply to the client.
2922: # The reply is a string of the following shape:
2923: # version=current&version:keys=k1:k2...&1:k1=v1&1:k2=v2...
2924: # Where the 1 above represents version 1.
2925: # this continues for all pairs of keys in all versions.
2926: #
2927: #
2928: #
2929: #
2930: sub restore_handler {
2931: my ($cmd, $tail, $client) = @_;
2932:
2933: my $userinput = "$cmd:$tail"; # Only used for logging purposes.
2934:
2935: my ($cmd,$udom,$uname,$namespace,$rid) = split(/:/,$userinput);
2936: $namespace=~s/\//\_/g;
2937: $namespace=~s/\W//g;
2938: chomp($rid);
2939: my $proname=&propath($udom,$uname);
2940: my $qresult='';
2941: my %hash;
2942: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",
2943: &GDBM_READER(),0640)) {
2944: my $version=$hash{"version:$rid"};
2945: $qresult.="version=$version&";
2946: my $scope;
2947: for ($scope=1;$scope<=$version;$scope++) {
2948: my $vkeys=$hash{"$scope:keys:$rid"};
2949: my @keys=split(/:/,$vkeys);
2950: my $key;
2951: $qresult.="$scope:keys=$vkeys&";
2952: foreach $key (@keys) {
2953: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
2954: }
2955: }
2956: if (untie(%hash)) {
2957: $qresult=~s/\&$//;
2958: &Reply( $client, "$qresult\n", $userinput);
2959: } else {
2960: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2961: "while attempting restore\n", $userinput);
2962: }
2963: } else {
2964: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2965: "while attempting restore\n", $userinput);
2966: }
2967:
2968: return 1;
2969:
2970:
2971: }
2972: ®ister_handler("restore", \&restore_handler, 0,1,0);
1.234 foxr 2973:
2974: #
2975: # Add a chat message to to a discussion board.
2976: #
2977: # Parameters:
2978: # $cmd - Request keyword.
2979: # $tail - Tail of the command. A colon separated list
2980: # containing:
2981: # cdom - Domain on which the chat board lives
2982: # cnum - Identifier of the discussion group.
2983: # post - Body of the posting.
2984: # $client - Socket open on the client.
2985: # Returns:
2986: # 1 - Indicating caller should keep on processing.
2987: #
2988: # Side-effects:
2989: # writes a reply to the client.
2990: #
2991: #
2992: sub send_chat_handler {
2993: my ($cmd, $tail, $client) = @_;
2994:
2995:
2996: my $userinput = "$cmd:$tail";
2997:
2998: my ($cdom,$cnum,$newpost)=split(/\:/,$tail);
2999: &chat_add($cdom,$cnum,$newpost);
3000: &Reply($client, "ok\n", $userinput);
3001:
3002: return 1;
3003: }
3004: ®ister_handler("chatsend", \&send_chat_handler, 0, 1, 0);
3005: #
3006: # Retrieve the set of chat messagss from a discussion board.
3007: #
3008: # Parameters:
3009: # $cmd - Command keyword that initiated the request.
3010: # $tail - Remainder of the request after the command
3011: # keyword. In this case a colon separated list of
3012: # chat domain - Which discussion board.
3013: # chat id - Discussion thread(?)
3014: # domain/user - Authentication domain and username
3015: # of the requesting person.
3016: # $client - Socket open on the client program.
3017: # Returns:
3018: # 1 - continue processing
3019: # Side effects:
3020: # Response is written to the client.
3021: #
3022: sub retrieve_chat_handler {
3023: my ($cmd, $tail, $client) = @_;
3024:
3025:
3026: my $userinput = "$cmd:$tail";
3027:
3028: my ($cdom,$cnum,$udom,$uname)=split(/\:/,$tail);
3029: my $reply='';
3030: foreach (&get_chat($cdom,$cnum,$udom,$uname)) {
3031: $reply.=&escape($_).':';
3032: }
3033: $reply=~s/\:$//;
3034: &Reply($client, $reply."\n", $userinput);
3035:
3036:
3037: return 1;
3038: }
3039: ®ister_handler("chatretr", \&retrieve_chat_handler, 0, 1, 0);
3040:
3041: #
3042: # Initiate a query of an sql database. SQL query repsonses get put in
3043: # a file for later retrieval. This prevents sql query results from
3044: # bottlenecking the system. Note that with loncnew, perhaps this is
3045: # less of an issue since multiple outstanding requests can be concurrently
3046: # serviced.
3047: #
3048: # Parameters:
3049: # $cmd - COmmand keyword that initiated the request.
3050: # $tail - Remainder of the command after the keyword.
3051: # For this function, this consists of a query and
3052: # 3 arguments that are self-documentingly labelled
3053: # in the original arg1, arg2, arg3.
3054: # $client - Socket open on the client.
3055: # Return:
3056: # 1 - Indicating processing should continue.
3057: # Side-effects:
3058: # a reply is written to $client.
3059: #
3060: sub send_query_handler {
3061: my ($cmd, $tail, $client) = @_;
3062:
3063:
3064: my $userinput = "$cmd:$tail";
3065:
3066: my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail);
3067: $query=~s/\n*$//g;
3068: &Reply($client, "". &sql_reply("$clientname\&$query".
3069: "\&$arg1"."\&$arg2"."\&$arg3")."\n",
3070: $userinput);
3071:
3072: return 1;
3073: }
3074: ®ister_handler("querysend", \&send_query_handler, 0, 1, 0);
3075:
3076: #
3077: # Add a reply to an sql query. SQL queries are done asyncrhonously.
3078: # The query is submitted via a "querysend" transaction.
3079: # There it is passed on to the lonsql daemon, queued and issued to
3080: # mysql.
3081: # This transaction is invoked when the sql transaction is complete
3082: # it stores the query results in flie and indicates query completion.
3083: # presumably local software then fetches this response... I'm guessing
3084: # the sequence is: lonc does a querysend, we ask lonsql to do it.
3085: # lonsql on completion of the query interacts with the lond of our
3086: # client to do a query reply storing two files:
3087: # - id - The results of the query.
3088: # - id.end - Indicating the transaction completed.
3089: # NOTE: id is a unique id assigned to the query and querysend time.
3090: # Parameters:
3091: # $cmd - Command keyword that initiated this request.
3092: # $tail - Remainder of the tail. In this case that's a colon
3093: # separated list containing the query Id and the
3094: # results of the query.
3095: # $client - Socket open on the client.
3096: # Return:
3097: # 1 - Indicating that we should continue processing.
3098: # Side effects:
3099: # ok written to the client.
3100: #
3101: sub reply_query_handler {
3102: my ($cmd, $tail, $client) = @_;
3103:
3104:
3105: my $userinput = "$cmd:$tail";
3106:
3107: my ($cmd,$id,$reply)=split(/:/,$userinput);
3108: my $store;
3109: my $execdir=$perlvar{'lonDaemons'};
3110: if ($store=IO::File->new(">$execdir/tmp/$id")) {
3111: $reply=~s/\&/\n/g;
3112: print $store $reply;
3113: close $store;
3114: my $store2=IO::File->new(">$execdir/tmp/$id.end");
3115: print $store2 "done\n";
3116: close $store2;
3117: &Reply($client, "ok\n", $userinput);
3118: } else {
3119: &Failure($client, "error: ".($!+0)
3120: ." IO::File->new Failed ".
3121: "while attempting queryreply\n", $userinput);
3122: }
3123:
3124:
3125: return 1;
3126: }
3127: ®ister_handler("queryreply", \&reply_query_handler, 0, 1, 0);
3128:
3129: #
3130: # Process the courseidput request. Not quite sure what this means
3131: # at the system level sense. It appears a gdbm file in the
3132: # /home/httpd/lonUsers/$domain/nohist_courseids is tied and
3133: # a set of entries made in that database.
3134: #
3135: # Parameters:
3136: # $cmd - The command keyword that initiated this request.
3137: # $tail - Tail of the command. In this case consists of a colon
3138: # separated list contaning the domain to apply this to and
3139: # an ampersand separated list of keyword=value pairs.
3140: # $client - Socket open on the client.
3141: # Returns:
3142: # 1 - indicating that processing should continue
3143: #
3144: # Side effects:
3145: # reply is written to the client.
3146: #
3147: sub put_course_id_handler {
3148: my ($cmd, $tail, $client) = @_;
3149:
3150:
3151: my $userinput = "$cmd:$tail";
3152:
3153: my ($udom, $what) = split(/:/, $tail);
3154: chomp($what);
3155: my $now=time;
3156: my @pairs=split(/\&/,$what);
3157:
3158: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3159: if ($hashref) {
3160: foreach my $pair (@pairs) {
1.253 foxr 3161: my ($key,$descr,$inst_code)=split(/=/,$pair);
3162: $hashref->{$key}=$descr.':'.$inst_code.':'.$now;
1.234 foxr 3163: }
3164: if (untie(%$hashref)) {
1.253 foxr 3165: &Reply( $client, "ok\n", $userinput);
1.234 foxr 3166: } else {
1.253 foxr 3167: &Failure($client, "error: ".($!+0)
1.234 foxr 3168: ." untie(GDBM) Failed ".
3169: "while attempting courseidput\n", $userinput);
3170: }
3171: } else {
1.253 foxr 3172: &Failure($client, "error: ".($!+0)
1.234 foxr 3173: ." tie(GDBM) Failed ".
3174: "while attempting courseidput\n", $userinput);
3175: }
1.253 foxr 3176:
1.234 foxr 3177:
3178: return 1;
3179: }
3180: ®ister_handler("courseidput", \&put_course_id_handler, 0, 1, 0);
3181:
3182: # Retrieves the value of a course id resource keyword pattern
3183: # defined since a starting date. Both the starting date and the
3184: # keyword pattern are optional. If the starting date is not supplied it
3185: # is treated as the beginning of time. If the pattern is not found,
3186: # it is treatred as "." matching everything.
3187: #
3188: # Parameters:
3189: # $cmd - Command keyword that resulted in us being dispatched.
3190: # $tail - The remainder of the command that, in this case, consists
3191: # of a colon separated list of:
3192: # domain - The domain in which the course database is
3193: # defined.
3194: # since - Optional parameter describing the minimum
3195: # time of definition(?) of the resources that
3196: # will match the dump.
3197: # description - regular expression that is used to filter
3198: # the dump. Only keywords matching this regexp
3199: # will be used.
3200: # $client - The socket open on the client.
3201: # Returns:
3202: # 1 - Continue processing.
3203: # Side Effects:
3204: # a reply is written to $client.
3205: sub dump_course_id_handler {
3206: my ($cmd, $tail, $client) = @_;
3207:
3208: my $userinput = "$cmd:$tail";
3209:
3210: my ($udom,$since,$description) =split(/:/,$tail);
3211: if (defined($description)) {
3212: $description=&unescape($description);
3213: } else {
3214: $description='.';
3215: }
3216: unless (defined($since)) { $since=0; }
3217: my $qresult='';
3218: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3219: if ($hashref) {
3220: while (my ($key,$value) = each(%$hashref)) {
3221: my ($descr,$lasttime,$inst_code);
3222: if ($value =~ m/^([^\:]*):([^\:]*):(\d+)$/) {
3223: ($descr,$inst_code,$lasttime)=($1,$2,$3);
3224: } else {
3225: ($descr,$lasttime) = split(/\:/,$value);
3226: }
3227: if ($lasttime<$since) { next; }
3228: if ($description eq '.') {
3229: $qresult.=$key.'='.$descr.':'.$inst_code.'&';
3230: } else {
3231: my $unescapeVal = &unescape($descr);
3232: if (eval('$unescapeVal=~/\Q$description\E/i')) {
3233: $qresult.=$key.'='.$descr.':'.$inst_code.'&';
3234: }
3235: }
3236: }
3237: if (untie(%$hashref)) {
3238: chop($qresult);
3239: &Reply($client, "$qresult\n", $userinput);
3240: } else {
3241: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3242: "while attempting courseiddump\n", $userinput);
3243: }
3244: } else {
3245: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3246: "while attempting courseiddump\n", $userinput);
3247: }
3248:
3249:
3250: return 1;
3251: }
3252: ®ister_handler("courseiddump", \&dump_course_id_handler, 0, 1, 0);
1.238 foxr 3253:
3254: #
3255: # Puts an id to a domains id database.
3256: #
3257: # Parameters:
3258: # $cmd - The command that triggered us.
3259: # $tail - Remainder of the request other than the command. This is a
3260: # colon separated list containing:
3261: # $domain - The domain for which we are writing the id.
3262: # $pairs - The id info to write... this is and & separated list
3263: # of keyword=value.
3264: # $client - Socket open on the client.
3265: # Returns:
3266: # 1 - Continue processing.
3267: # Side effects:
3268: # reply is written to $client.
3269: #
3270: sub put_id_handler {
3271: my ($cmd,$tail,$client) = @_;
3272:
3273:
3274: my $userinput = "$cmd:$tail";
3275:
3276: my ($udom,$what)=split(/:/,$tail);
3277: chomp($what);
3278: my @pairs=split(/\&/,$what);
3279: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
3280: "P", $what);
3281: if ($hashref) {
3282: foreach my $pair (@pairs) {
3283: my ($key,$value)=split(/=/,$pair);
3284: $hashref->{$key}=$value;
3285: }
3286: if (untie(%$hashref)) {
3287: &Reply($client, "ok\n", $userinput);
3288: } else {
3289: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3290: "while attempting idput\n", $userinput);
3291: }
3292: } else {
3293: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3294: "while attempting idput\n", $userinput);
3295: }
3296:
3297: return 1;
3298: }
3299:
3300: ®ister_handler("idput", \&put_id_handler, 0, 1, 0);
3301: #
3302: # Retrieves a set of id values from the id database.
3303: # Returns an & separated list of results, one for each requested id to the
3304: # client.
3305: #
3306: # Parameters:
3307: # $cmd - Command keyword that caused us to be dispatched.
3308: # $tail - Tail of the command. Consists of a colon separated:
3309: # domain - the domain whose id table we dump
3310: # ids Consists of an & separated list of
3311: # id keywords whose values will be fetched.
3312: # nonexisting keywords will have an empty value.
3313: # $client - Socket open on the client.
3314: #
3315: # Returns:
3316: # 1 - indicating processing should continue.
3317: # Side effects:
3318: # An & separated list of results is written to $client.
3319: #
3320: sub get_id_handler {
3321: my ($cmd, $tail, $client) = @_;
3322:
3323:
3324: my $userinput = "$client:$tail";
3325:
3326: my ($udom,$what)=split(/:/,$tail);
3327: chomp($what);
3328: my @queries=split(/\&/,$what);
3329: my $qresult='';
3330: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_READER());
3331: if ($hashref) {
3332: for (my $i=0;$i<=$#queries;$i++) {
3333: $qresult.="$hashref->{$queries[$i]}&";
3334: }
3335: if (untie(%$hashref)) {
3336: $qresult=~s/\&$//;
3337: &Reply($client, "$qresult\n", $userinput);
3338: } else {
3339: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3340: "while attempting idget\n",$userinput);
3341: }
3342: } else {
3343: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3344: "while attempting idget\n",$userinput);
3345: }
3346:
3347: return 1;
3348: }
3349:
3350: register_handler("idget", \&get_id_handler, 0, 1, 0);
3351:
3352: #
3353: # Process the tmpput command I'm not sure what this does.. Seems to
3354: # create a file in the lonDaemons/tmp directory of the form $id.tmp
3355: # where Id is the client's ip concatenated with a sequence number.
3356: # The file will contain some value that is passed in. Is this e.g.
3357: # a login token?
3358: #
3359: # Parameters:
3360: # $cmd - The command that got us dispatched.
3361: # $tail - The remainder of the request following $cmd:
3362: # In this case this will be the contents of the file.
3363: # $client - Socket connected to the client.
3364: # Returns:
3365: # 1 indicating processing can continue.
3366: # Side effects:
3367: # A file is created in the local filesystem.
3368: # A reply is sent to the client.
3369: sub tmp_put_handler {
3370: my ($cmd, $what, $client) = @_;
3371:
3372: my $userinput = "$cmd:$what"; # Reconstruct for logging.
3373:
3374:
3375: my $store;
3376: $tmpsnum++;
3377: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
3378: $id=~s/\W/\_/g;
3379: $what=~s/\n//g;
3380: my $execdir=$perlvar{'lonDaemons'};
3381: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
3382: print $store $what;
3383: close $store;
3384: &Reply($client, "$id\n", $userinput);
3385: } else {
3386: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
3387: "while attempting tmpput\n", $userinput);
3388: }
3389: return 1;
3390:
3391: }
3392: ®ister_handler("tmpput", \&tmp_put_handler, 0, 1, 0);
3393: # Processes the tmpget command. This command returns the contents
3394: # of a temporary resource file(?) created via tmpput.
3395: #
3396: # Paramters:
3397: # $cmd - Command that got us dispatched.
3398: # $id - Tail of the command, contain the id of the resource
3399: # we want to fetch.
3400: # $client - socket open on the client.
3401: # Return:
3402: # 1 - Inidcating processing can continue.
3403: # Side effects:
3404: # A reply is sent to the client.
3405:
3406: #
3407: sub tmp_get_handler {
3408: my ($cmd, $id, $client) = @_;
3409:
3410: my $userinput = "$cmd:$id";
3411:
3412:
3413: $id=~s/\W/\_/g;
3414: my $store;
3415: my $execdir=$perlvar{'lonDaemons'};
3416: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
3417: my $reply=<$store>;
3418: &Reply( $client, "$reply\n", $userinput);
3419: close $store;
3420: } else {
3421: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
3422: "while attempting tmpget\n", $userinput);
3423: }
3424:
3425: return 1;
3426: }
3427: ®ister_handler("tmpget", \&tmp_get_handler, 0, 1, 0);
3428: #
3429: # Process the tmpdel command. This command deletes a temp resource
3430: # created by the tmpput command.
3431: #
3432: # Parameters:
3433: # $cmd - Command that got us here.
3434: # $id - Id of the temporary resource created.
3435: # $client - socket open on the client process.
3436: #
3437: # Returns:
3438: # 1 - Indicating processing should continue.
3439: # Side Effects:
3440: # A file is deleted
3441: # A reply is sent to the client.
3442: sub tmp_del_handler {
3443: my ($cmd, $id, $client) = @_;
3444:
3445: my $userinput= "$cmd:$id";
3446:
3447: chomp($id);
3448: $id=~s/\W/\_/g;
3449: my $execdir=$perlvar{'lonDaemons'};
3450: if (unlink("$execdir/tmp/$id.tmp")) {
3451: &Reply($client, "ok\n", $userinput);
3452: } else {
3453: &Failure( $client, "error: ".($!+0)."Unlink tmp Failed ".
3454: "while attempting tmpdel\n", $userinput);
3455: }
3456:
3457: return 1;
3458:
3459: }
3460: ®ister_handler("tmpdel", \&tmp_del_handler, 0, 1, 0);
3461: #
1.246 foxr 3462: # Processes the setannounce command. This command
3463: # creates a file named announce.txt in the top directory of
3464: # the documentn root and sets its contents. The announce.txt file is
3465: # printed in its entirety at the LonCAPA login page. Note:
3466: # once the announcement.txt fileis created it cannot be deleted.
3467: # However, setting the contents of the file to empty removes the
3468: # announcement from the login page of loncapa so who cares.
3469: #
3470: # Parameters:
3471: # $cmd - The command that got us dispatched.
3472: # $announcement - The text of the announcement.
3473: # $client - Socket open on the client process.
3474: # Retunrns:
3475: # 1 - Indicating request processing should continue
3476: # Side Effects:
3477: # The file {DocRoot}/announcement.txt is created.
3478: # A reply is sent to $client.
3479: #
3480: sub set_announce_handler {
3481: my ($cmd, $announcement, $client) = @_;
3482:
3483: my $userinput = "$cmd:$announcement";
3484:
3485: chomp($announcement);
3486: $announcement=&unescape($announcement);
3487: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
3488: '/announcement.txt')) {
3489: print $store $announcement;
3490: close $store;
3491: &Reply($client, "ok\n", $userinput);
3492: } else {
3493: &Failure($client, "error: ".($!+0)."\n", $userinput);
3494: }
3495:
3496: return 1;
3497: }
3498: ®ister_handler("setannounce", \&set_announce_handler, 0, 1, 0);
3499: #
3500: # Return the version of the daemon. This can be used to determine
3501: # the compatibility of cross version installations or, alternatively to
3502: # simply know who's out of date and who isn't. Note that the version
3503: # is returned concatenated with the tail.
3504: # Parameters:
3505: # $cmd - the request that dispatched to us.
3506: # $tail - Tail of the request (client's version?).
3507: # $client - Socket open on the client.
3508: #Returns:
3509: # 1 - continue processing requests.
3510: # Side Effects:
3511: # Replies with version to $client.
3512: sub get_version_handler {
3513: my ($cmd, $tail, $client) = @_;
3514:
3515: my $userinput = $cmd.$tail;
3516:
3517: &Reply($client, &version($userinput)."\n", $userinput);
3518:
3519:
3520: return 1;
3521: }
3522: ®ister_handler("version", \&get_version_handler, 0, 1, 0);
3523: # Set the current host and domain. This is used to support
3524: # multihomed systems. Each IP of the system, or even separate daemons
3525: # on the same IP can be treated as handling a separate lonCAPA virtual
3526: # machine. This command selects the virtual lonCAPA. The client always
3527: # knows the right one since it is lonc and it is selecting the domain/system
3528: # from the hosts.tab file.
3529: # Parameters:
3530: # $cmd - Command that dispatched us.
3531: # $tail - Tail of the command (domain/host requested).
3532: # $socket - Socket open on the client.
3533: #
3534: # Returns:
3535: # 1 - Indicates the program should continue to process requests.
3536: # Side-effects:
3537: # The default domain/system context is modified for this daemon.
3538: # a reply is sent to the client.
3539: #
3540: sub set_virtual_host_handler {
3541: my ($cmd, $tail, $socket) = @_;
3542:
3543: my $userinput ="$cmd:$tail";
3544:
3545: &Reply($client, &sethost($userinput)."\n", $userinput);
3546:
3547:
3548: return 1;
3549: }
1.247 albertel 3550: ®ister_handler("sethost", \&set_virtual_host_handler, 0, 1, 0);
1.246 foxr 3551:
3552: # Process a request to exit:
3553: # - "bye" is sent to the client.
3554: # - The client socket is shutdown and closed.
3555: # - We indicate to the caller that we should exit.
3556: # Formal Parameters:
3557: # $cmd - The command that got us here.
3558: # $tail - Tail of the command (empty).
3559: # $client - Socket open on the tail.
3560: # Returns:
3561: # 0 - Indicating the program should exit!!
3562: #
3563: sub exit_handler {
3564: my ($cmd, $tail, $client) = @_;
3565:
3566: my $userinput = "$cmd:$tail";
3567:
3568: &logthis("Client $clientip ($clientname) hanging up: $userinput");
3569: &Reply($client, "bye\n", $userinput);
3570: $client->shutdown(2); # shutdown the socket forcibly.
3571: $client->close();
3572:
3573: return 0;
3574: }
1.248 foxr 3575: ®ister_handler("exit", \&exit_handler, 0,1,1);
3576: ®ister_handler("init", \&exit_handler, 0,1,1);
3577: ®ister_handler("quit", \&exit_handler, 0,1,1);
3578:
3579: # Determine if auto-enrollment is enabled.
3580: # Note that the original had what I believe to be a defect.
3581: # The original returned 0 if the requestor was not a registerd client.
3582: # It should return "refused".
3583: # Formal Parameters:
3584: # $cmd - The command that invoked us.
3585: # $tail - The tail of the command (Extra command parameters.
3586: # $client - The socket open on the client that issued the request.
3587: # Returns:
3588: # 1 - Indicating processing should continue.
3589: #
3590: sub enrollment_enabled_handler {
3591: my ($cmd, $tail, $client) = @_;
3592: my $userinput = $cmd.":".$tail; # For logging purposes.
3593:
3594:
3595: my $cdom = split(/:/, $tail); # Domain we're asking about.
3596: my $outcome = &localenroll::run($cdom);
3597: &Reply($client, "$outcome\n", $userinput);
3598:
3599: return 1;
3600: }
3601: ®ister_handler("autorun", \&enrollment_enabled_handler, 0, 1, 0);
3602:
3603: # Get the official sections for which auto-enrollment is possible.
3604: # Since the admin people won't know about 'unofficial sections'
3605: # we cannot auto-enroll on them.
3606: # Formal Parameters:
3607: # $cmd - The command request that got us dispatched here.
3608: # $tail - The remainder of the request. In our case this
3609: # will be split into:
3610: # $coursecode - The course name from the admin point of view.
3611: # $cdom - The course's domain(?).
3612: # $client - Socket open on the client.
3613: # Returns:
3614: # 1 - Indiciting processing should continue.
3615: #
3616: sub get_sections_handler {
3617: my ($cmd, $tail, $client) = @_;
3618: my $userinput = "$cmd:$tail";
3619:
3620: my ($coursecode, $cdom) = split(/:/, $tail);
3621: my @secs = &localenroll::get_sections($coursecode,$cdom);
3622: my $seclist = &escape(join(':',@secs));
3623:
3624: &Reply($client, "$seclist\n", $userinput);
3625:
3626:
3627: return 1;
3628: }
3629: ®ister_handler("autogetsections", \&get_sections_handler, 0, 1, 0);
3630:
3631: # Validate the owner of a new course section.
3632: #
3633: # Formal Parameters:
3634: # $cmd - Command that got us dispatched.
3635: # $tail - the remainder of the command. For us this consists of a
3636: # colon separated string containing:
3637: # $inst - Course Id from the institutions point of view.
3638: # $owner - Proposed owner of the course.
3639: # $cdom - Domain of the course (from the institutions
3640: # point of view?)..
3641: # $client - Socket open on the client.
3642: #
3643: # Returns:
3644: # 1 - Processing should continue.
3645: #
3646: sub validate_course_owner_handler {
3647: my ($cmd, $tail, $client) = @_;
3648: my $userinput = "$cmd:$tail";
3649: my ($inst_course_id, $owner, $cdom) = split(/:/, $tail);
3650:
3651: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom);
3652: &Reply($client, "$outcome\n", $userinput);
3653:
3654:
3655:
3656: return 1;
3657: }
3658: ®ister_handler("autonewcourse", \&validate_course_owner_handler, 0, 1, 0);
3659: #
3660: # Validate a course section in the official schedule of classes
3661: # from the institutions point of view (part of autoenrollment).
3662: #
3663: # Formal Parameters:
3664: # $cmd - The command request that got us dispatched.
3665: # $tail - The tail of the command. In this case,
3666: # this is a colon separated set of words that will be split
3667: # into:
3668: # $inst_course_id - The course/section id from the
3669: # institutions point of view.
3670: # $cdom - The domain from the institutions
3671: # point of view.
3672: # $client - Socket open on the client.
3673: # Returns:
3674: # 1 - Indicating processing should continue.
3675: #
3676: sub validate_course_section_handler {
3677: my ($cmd, $tail, $client) = @_;
3678: my $userinput = "$cmd:$tail";
3679: my ($inst_course_id, $cdom) = split(/:/, $tail);
3680:
3681: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
3682: &Reply($client, "$outcome\n", $userinput);
3683:
3684:
3685: return 1;
3686: }
3687: ®ister_handler("autovalidatecourse", \&validate_course_section_handler, 0, 1, 0);
3688:
3689: #
3690: # Create a password for a new auto-enrollment user.
3691: # I think/guess, this password allows access to the institutions
3692: # AIS class list server/services. Stuart can correct this comment
3693: # when he finds out how wrong I am.
3694: #
3695: # Formal Parameters:
3696: # $cmd - The command request that got us dispatched.
3697: # $tail - The tail of the command. In this case this is a colon separated
3698: # set of words that will be split into:
3699: # $authparam - An authentication parameter (username??).
3700: # $cdom - The domain of the course from the institution's
3701: # point of view.
3702: # $client - The socket open on the client.
3703: # Returns:
3704: # 1 - continue processing.
3705: #
3706: sub create_auto_enroll_password_handler {
3707: my ($cmd, $tail, $client) = @_;
3708: my $userinput = "$cmd:$tail";
3709:
3710: my ($authparam, $cdom) = split(/:/, $userinput);
3711:
3712: my ($create_passwd,$authchk);
3713: ($authparam,
3714: $create_passwd,
3715: $authchk) = &localenroll::create_password($authparam,$cdom);
3716:
3717: &Reply($client, &escape($authparam.':'.$create_passwd.':'.$authchk)."\n",
3718: $userinput);
3719:
3720:
3721: return 1;
3722: }
3723: ®ister_handler("autocreatepassword", \&create_auto_enroll_password_handler,
3724: 0, 1, 0);
3725:
3726: # Retrieve and remove temporary files created by/during autoenrollment.
3727: #
3728: # Formal Parameters:
3729: # $cmd - The command that got us dispatched.
3730: # $tail - The tail of the command. In our case this is a colon
3731: # separated list that will be split into:
3732: # $filename - The name of the file to remove.
3733: # The filename is given as a path relative to
3734: # the LonCAPA temp file directory.
3735: # $client - Socket open on the client.
3736: #
3737: # Returns:
3738: # 1 - Continue processing.
3739:
3740: sub retrieve_auto_file_handler {
3741: my ($cmd, $tail, $client) = @_;
3742: my $userinput = "cmd:$tail";
3743:
3744: my ($filename) = split(/:/, $tail);
3745:
3746: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
3747: if ( (-e $source) && ($filename ne '') ) {
3748: my $reply = '';
3749: if (open(my $fh,$source)) {
3750: while (<$fh>) {
3751: chomp($_);
3752: $_ =~ s/^\s+//g;
3753: $_ =~ s/\s+$//g;
3754: $reply .= $_;
3755: }
3756: close($fh);
3757: &Reply($client, &escape($reply)."\n", $userinput);
3758:
3759: # Does this have to be uncommented??!? (RF).
3760: #
3761: # unlink($source);
3762: } else {
3763: &Failure($client, "error\n", $userinput);
3764: }
3765: } else {
3766: &Failure($client, "error\n", $userinput);
3767: }
3768:
3769:
3770: return 1;
3771: }
3772: ®ister_handler("autoretrieve", \&retrieve_auto_file_handler, 0,1,0);
3773:
3774: #
3775: # Read and retrieve institutional code format (for support form).
3776: # Formal Parameters:
3777: # $cmd - Command that dispatched us.
3778: # $tail - Tail of the command. In this case it conatins
3779: # the course domain and the coursename.
3780: # $client - Socket open on the client.
3781: # Returns:
3782: # 1 - Continue processing.
3783: #
3784: sub get_institutional_code_format_handler {
3785: my ($cmd, $tail, $client) = @_;
3786: my $userinput = "$cmd:$tail";
3787:
3788: my $reply;
3789: my($cdom,$course) = split(/:/,$tail);
3790: my @pairs = split/\&/,$course;
3791: my %instcodes = ();
3792: my %codes = ();
3793: my @codetitles = ();
3794: my %cat_titles = ();
3795: my %cat_order = ();
3796: foreach (@pairs) {
3797: my ($key,$value) = split/=/,$_;
3798: $instcodes{&unescape($key)} = &unescape($value);
3799: }
3800: my $formatreply = &localenroll::instcode_format($cdom,
3801: \%instcodes,
3802: \%codes,
3803: \@codetitles,
3804: \%cat_titles,
3805: \%cat_order);
3806: if ($formatreply eq 'ok') {
3807: my $codes_str = &hash2str(%codes);
3808: my $codetitles_str = &array2str(@codetitles);
3809: my $cat_titles_str = &hash2str(%cat_titles);
3810: my $cat_order_str = &hash2str(%cat_order);
3811: &Reply($client,
3812: $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'
3813: .$cat_order_str."\n",
3814: $userinput);
3815: } else {
3816: # this else branch added by RF since if not ok, lonc will
3817: # hang waiting on reply until timeout.
3818: #
3819: &Reply($client, "format_error\n", $userinput);
3820: }
3821:
3822: return 1;
3823: }
1.246 foxr 3824:
1.248 foxr 3825: ®ister_handler("autoinstcodeformat", \&get_institutional_code_format_handler,
3826: 0,1,0);
1.246 foxr 3827:
3828: #
3829: #
1.234 foxr 3830: #
1.231 foxr 3831: #
3832: #
1.207 foxr 3833: #---------------------------------------------------------------
3834: #
3835: # Getting, decoding and dispatching requests:
3836: #
3837:
3838: #
3839: # Get a Request:
3840: # Gets a Request message from the client. The transaction
3841: # is defined as a 'line' of text. We remove the new line
3842: # from the text line.
1.226 foxr 3843: #
1.211 albertel 3844: sub get_request {
1.207 foxr 3845: my $input = <$client>;
3846: chomp($input);
1.226 foxr 3847:
1.234 foxr 3848: &Debug("get_request: Request = $input\n");
1.207 foxr 3849:
3850: &status('Processing '.$clientname.':'.$input);
3851:
3852: return $input;
3853: }
1.212 foxr 3854: #---------------------------------------------------------------
3855: #
3856: # Process a request. This sub should shrink as each action
3857: # gets farmed out into a separat sub that is registered
3858: # with the dispatch hash.
3859: #
3860: # Parameters:
3861: # user_input - The request received from the client (lonc).
3862: # Returns:
3863: # true to keep processing, false if caller should exit.
3864: #
3865: sub process_request {
3866: my ($userinput) = @_; # Easier for now to break style than to
3867: # fix all the userinput -> user_input.
3868: my $wasenc = 0; # True if request was encrypted.
3869: # ------------------------------------------------------------ See if encrypted
3870: if ($userinput =~ /^enc/) {
3871: $userinput = decipher($userinput);
3872: $wasenc=1;
3873: if(!$userinput) { # Cipher not defined.
1.251 foxr 3874: &Failure($client, "error: Encrypted data without negotated key\n");
1.212 foxr 3875: return 0;
3876: }
3877: }
3878: Debug("process_request: $userinput\n");
3879:
1.213 foxr 3880: #
3881: # The 'correct way' to add a command to lond is now to
3882: # write a sub to execute it and Add it to the command dispatch
3883: # hash via a call to register_handler.. The comments to that
3884: # sub should give you enough to go on to show how to do this
3885: # along with the examples that are building up as this code
3886: # is getting refactored. Until all branches of the
3887: # if/elseif monster below have been factored out into
3888: # separate procesor subs, if the dispatch hash is missing
3889: # the command keyword, we will fall through to the remainder
3890: # of the if/else chain below in order to keep this thing in
3891: # working order throughout the transmogrification.
3892:
3893: my ($command, $tail) = split(/:/, $userinput, 2);
3894: chomp($command);
3895: chomp($tail);
3896: $tail =~ s/(\r)//; # This helps people debugging with e.g. telnet.
1.214 foxr 3897: $command =~ s/(\r)//; # And this too for parameterless commands.
3898: if(!$tail) {
3899: $tail =""; # defined but blank.
3900: }
1.213 foxr 3901:
3902: &Debug("Command received: $command, encoded = $wasenc");
3903:
3904: if(defined $Dispatcher{$command}) {
3905:
3906: my $dispatch_info = $Dispatcher{$command};
3907: my $handler = $$dispatch_info[0];
3908: my $need_encode = $$dispatch_info[1];
3909: my $client_types = $$dispatch_info[2];
3910: Debug("Matched dispatch hash: mustencode: $need_encode "
3911: ."ClientType $client_types");
3912:
3913: # Validate the request:
3914:
3915: my $ok = 1;
3916: my $requesterprivs = 0;
3917: if(&isClient()) {
3918: $requesterprivs |= $CLIENT_OK;
3919: }
3920: if(&isManager()) {
3921: $requesterprivs |= $MANAGER_OK;
3922: }
3923: if($need_encode && (!$wasenc)) {
3924: Debug("Must encode but wasn't: $need_encode $wasenc");
3925: $ok = 0;
3926: }
3927: if(($client_types & $requesterprivs) == 0) {
3928: Debug("Client not privileged to do this operation");
3929: $ok = 0;
3930: }
3931:
3932: if($ok) {
3933: Debug("Dispatching to handler $command $tail");
3934: my $keep_going = &$handler($command, $tail, $client);
3935: return $keep_going;
3936: } else {
3937: Debug("Refusing to dispatch because client did not match requirements");
3938: Failure($client, "refused\n", $userinput);
3939: return 1;
3940: }
3941:
3942: }
3943:
1.215 foxr 3944: #------------------- Commands not yet in spearate handlers. --------------
3945:
1.212 foxr 3946: #------------------------------- is auto-enrollment enabled?
1.246 foxr 3947: if ($userinput =~/^autorun/) {
1.212 foxr 3948: if (isClient) {
3949: my ($cmd,$cdom) = split(/:/,$userinput);
3950: my $outcome = &localenroll::run($cdom);
3951: print $client "$outcome\n";
3952: } else {
3953: print $client "0\n";
3954: }
3955: #------------------------------- get official sections (for auto-enrollment).
1.231 foxr 3956: } elsif ($userinput =~/^autogetsections/) {
1.212 foxr 3957: if (isClient) {
3958: my ($cmd,$coursecode,$cdom)=split(/:/,$userinput);
3959: my @secs = &localenroll::get_sections($coursecode,$cdom);
3960: my $seclist = &escape(join(':',@secs));
3961: print $client "$seclist\n";
3962: } else {
3963: print $client "refused\n";
3964: }
3965: #----------------------- validate owner of new course section (for auto-enrollment).
1.231 foxr 3966: } elsif ($userinput =~/^autonewcourse/) {
1.212 foxr 3967: if (isClient) {
3968: my ($cmd,$inst_course_id,$owner,$cdom)=split(/:/,$userinput);
3969: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom);
3970: print $client "$outcome\n";
3971: } else {
3972: print $client "refused\n";
3973: }
3974: #-------------- validate course section in schedule of classes (for auto-enrollment).
1.231 foxr 3975: } elsif ($userinput =~/^autovalidatecourse/) {
1.212 foxr 3976: if (isClient) {
3977: my ($cmd,$inst_course_id,$cdom)=split(/:/,$userinput);
3978: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
3979: print $client "$outcome\n";
3980: } else {
3981: print $client "refused\n";
3982: }
3983: #--------------------------- create password for new user (for auto-enrollment).
1.231 foxr 3984: } elsif ($userinput =~/^autocreatepassword/) {
1.212 foxr 3985: if (isClient) {
3986: my ($cmd,$authparam,$cdom)=split(/:/,$userinput);
3987: my ($create_passwd,$authchk);
3988: ($authparam,$create_passwd,$authchk) = &localenroll::create_password($authparam,$cdom);
3989: print $client &escape($authparam.':'.$create_passwd.':'.$authchk)."\n";
3990: } else {
3991: print $client "refused\n";
3992: }
3993: #--------------------------- read and remove temporary files (for auto-enrollment).
1.231 foxr 3994: } elsif ($userinput =~/^autoretrieve/) {
1.212 foxr 3995: if (isClient) {
3996: my ($cmd,$filename) = split(/:/,$userinput);
3997: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
3998: if ( (-e $source) && ($filename ne '') ) {
3999: my $reply = '';
4000: if (open(my $fh,$source)) {
4001: while (<$fh>) {
4002: chomp($_);
4003: $_ =~ s/^\s+//g;
4004: $_ =~ s/\s+$//g;
4005: $reply .= $_;
4006: }
4007: close($fh);
4008: print $client &escape($reply)."\n";
4009: # unlink($source);
4010: } else {
4011: print $client "error\n";
4012: }
4013: } else {
4014: print $client "error\n";
4015: }
4016: } else {
4017: print $client "refused\n";
4018: }
1.248 foxr 4019: #--------------------- read and retrieve institutional code format
4020: # (for support form).
1.231 foxr 4021: } elsif ($userinput =~/^autoinstcodeformat/) {
1.212 foxr 4022: if (isClient) {
4023: my $reply;
4024: my($cmd,$cdom,$course) = split(/:/,$userinput);
4025: my @pairs = split/\&/,$course;
4026: my %instcodes = ();
4027: my %codes = ();
4028: my @codetitles = ();
4029: my %cat_titles = ();
4030: my %cat_order = ();
4031: foreach (@pairs) {
4032: my ($key,$value) = split/=/,$_;
4033: $instcodes{&unescape($key)} = &unescape($value);
4034: }
4035: my $formatreply = &localenroll::instcode_format($cdom,\%instcodes,\%codes,\@codetitles,\%cat_titles,\%cat_order);
4036: if ($formatreply eq 'ok') {
4037: my $codes_str = &hash2str(%codes);
4038: my $codetitles_str = &array2str(@codetitles);
4039: my $cat_titles_str = &hash2str(%cat_titles);
4040: my $cat_order_str = &hash2str(%cat_order);
4041: print $client $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'.$cat_order_str."\n";
4042: }
4043: } else {
4044: print $client "refused\n";
4045: }
4046: # ------------------------------------------------------------- unknown command
4047:
4048: } else {
4049: # unknown command
4050: print $client "unknown_cmd\n";
4051: }
4052: # -------------------------------------------------------------------- complete
4053: Debug("process_request - returning 1");
4054: return 1;
4055: }
1.207 foxr 4056: #
4057: # Decipher encoded traffic
4058: # Parameters:
4059: # input - Encoded data.
4060: # Returns:
4061: # Decoded data or undef if encryption key was not yet negotiated.
4062: # Implicit input:
4063: # cipher - This global holds the negotiated encryption key.
4064: #
1.211 albertel 4065: sub decipher {
1.207 foxr 4066: my ($input) = @_;
4067: my $output = '';
1.212 foxr 4068:
4069:
1.207 foxr 4070: if($cipher) {
4071: my($enc, $enclength, $encinput) = split(/:/, $input);
4072: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
4073: $output .=
4074: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
4075: }
4076: return substr($output, 0, $enclength);
4077: } else {
4078: return undef;
4079: }
4080: }
4081:
4082: #
4083: # Register a command processor. This function is invoked to register a sub
4084: # to process a request. Once registered, the ProcessRequest sub can automatically
4085: # dispatch requests to an appropriate sub, and do the top level validity checking
4086: # as well:
4087: # - Is the keyword recognized.
4088: # - Is the proper client type attempting the request.
4089: # - Is the request encrypted if it has to be.
4090: # Parameters:
4091: # $request_name - Name of the request being registered.
4092: # This is the command request that will match
4093: # against the hash keywords to lookup the information
4094: # associated with the dispatch information.
4095: # $procedure - Reference to a sub to call to process the request.
4096: # All subs get called as follows:
4097: # Procedure($cmd, $tail, $replyfd, $key)
4098: # $cmd - the actual keyword that invoked us.
4099: # $tail - the tail of the request that invoked us.
4100: # $replyfd- File descriptor connected to the client
4101: # $must_encode - True if the request must be encoded to be good.
4102: # $client_ok - True if it's ok for a client to request this.
4103: # $manager_ok - True if it's ok for a manager to request this.
4104: # Side effects:
4105: # - On success, the Dispatcher hash has an entry added for the key $RequestName
4106: # - On failure, the program will die as it's a bad internal bug to try to
4107: # register a duplicate command handler.
4108: #
1.211 albertel 4109: sub register_handler {
1.212 foxr 4110: my ($request_name,$procedure,$must_encode, $client_ok,$manager_ok) = @_;
1.207 foxr 4111:
4112: # Don't allow duplication#
4113:
4114: if (defined $Dispatcher{$request_name}) {
4115: die "Attempting to define a duplicate request handler for $request_name\n";
4116: }
4117: # Build the client type mask:
4118:
4119: my $client_type_mask = 0;
4120: if($client_ok) {
4121: $client_type_mask |= $CLIENT_OK;
4122: }
4123: if($manager_ok) {
4124: $client_type_mask |= $MANAGER_OK;
4125: }
4126:
4127: # Enter the hash:
4128:
4129: my @entry = ($procedure, $must_encode, $client_type_mask);
4130:
4131: $Dispatcher{$request_name} = \@entry;
4132:
4133: }
4134:
4135:
4136: #------------------------------------------------------------------
4137:
4138:
4139:
4140:
1.141 foxr 4141: #
1.96 foxr 4142: # Convert an error return code from lcpasswd to a string value.
4143: #
4144: sub lcpasswdstrerror {
4145: my $ErrorCode = shift;
1.97 foxr 4146: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
1.96 foxr 4147: return "lcpasswd Unrecognized error return value ".$ErrorCode;
4148: } else {
1.98 foxr 4149: return $passwderrors[$ErrorCode];
1.96 foxr 4150: }
4151: }
4152:
1.97 foxr 4153: #
4154: # Convert an error return code from lcuseradd to a string value:
4155: #
4156: sub lcuseraddstrerror {
4157: my $ErrorCode = shift;
4158: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
4159: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
4160: } else {
1.98 foxr 4161: return $adderrors[$ErrorCode];
1.97 foxr 4162: }
4163: }
4164:
1.23 harris41 4165: # grabs exception and records it to log before exiting
4166: sub catchexception {
1.27 albertel 4167: my ($error)=@_;
1.25 www 4168: $SIG{'QUIT'}='DEFAULT';
4169: $SIG{__DIE__}='DEFAULT';
1.165 albertel 4170: &status("Catching exception");
1.190 albertel 4171: &logthis("<font color='red'>CRITICAL: "
1.134 albertel 4172: ."ABNORMAL EXIT. Child $$ for server $thisserver died through "
1.27 albertel 4173: ."a crash with this error msg->[$error]</font>");
1.57 www 4174: &logthis('Famous last words: '.$status.' - '.$lastlog);
1.27 albertel 4175: if ($client) { print $client "error: $error\n"; }
1.59 www 4176: $server->close();
1.27 albertel 4177: die($error);
1.23 harris41 4178: }
1.63 www 4179: sub timeout {
1.165 albertel 4180: &status("Handling Timeout");
1.190 albertel 4181: &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
1.63 www 4182: &catchexception('Timeout');
4183: }
1.22 harris41 4184: # -------------------------------- Set signal handlers to record abnormal exits
4185:
1.226 foxr 4186:
1.22 harris41 4187: $SIG{'QUIT'}=\&catchexception;
4188: $SIG{__DIE__}=\&catchexception;
4189:
1.81 matthew 4190: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
1.95 harris41 4191: &status("Read loncapa.conf and loncapa_apache.conf");
4192: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
1.141 foxr 4193: %perlvar=%{$perlvarref};
1.80 harris41 4194: undef $perlvarref;
1.19 www 4195:
1.35 harris41 4196: # ----------------------------- Make sure this process is running from user=www
4197: my $wwwid=getpwnam('www');
4198: if ($wwwid!=$<) {
1.134 albertel 4199: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
4200: my $subj="LON: $currenthostid User ID mismatch";
1.37 harris41 4201: system("echo 'User ID mismatch. lond must be run as user www.' |\
1.35 harris41 4202: mailto $emailto -s '$subj' > /dev/null");
4203: exit 1;
4204: }
4205:
1.19 www 4206: # --------------------------------------------- Check if other instance running
4207:
4208: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
4209:
4210: if (-e $pidfile) {
4211: my $lfh=IO::File->new("$pidfile");
4212: my $pide=<$lfh>;
4213: chomp($pide);
1.29 harris41 4214: if (kill 0 => $pide) { die "already running"; }
1.19 www 4215: }
1.1 albertel 4216:
4217: # ------------------------------------------------------------- Read hosts file
4218:
4219:
4220:
4221: # establish SERVER socket, bind and listen.
4222: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
4223: Type => SOCK_STREAM,
4224: Proto => 'tcp',
4225: Reuse => 1,
4226: Listen => 10 )
1.29 harris41 4227: or die "making socket: $@\n";
1.1 albertel 4228:
4229: # --------------------------------------------------------- Do global variables
4230:
4231: # global variables
4232:
1.134 albertel 4233: my %children = (); # keys are current child process IDs
1.1 albertel 4234:
4235: sub REAPER { # takes care of dead children
4236: $SIG{CHLD} = \&REAPER;
1.165 albertel 4237: &status("Handling child death");
1.178 foxr 4238: my $pid;
4239: do {
4240: $pid = waitpid(-1,&WNOHANG());
4241: if (defined($children{$pid})) {
4242: &logthis("Child $pid died");
4243: delete($children{$pid});
1.183 albertel 4244: } elsif ($pid > 0) {
1.178 foxr 4245: &logthis("Unknown Child $pid died");
4246: }
4247: } while ( $pid > 0 );
4248: foreach my $child (keys(%children)) {
4249: $pid = waitpid($child,&WNOHANG());
4250: if ($pid > 0) {
4251: &logthis("Child $child - $pid looks like we missed it's death");
4252: delete($children{$pid});
4253: }
1.176 albertel 4254: }
1.165 albertel 4255: &status("Finished Handling child death");
1.1 albertel 4256: }
4257:
4258: sub HUNTSMAN { # signal handler for SIGINT
1.165 albertel 4259: &status("Killing children (INT)");
1.1 albertel 4260: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
4261: kill 'INT' => keys %children;
1.59 www 4262: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.1 albertel 4263: my $execdir=$perlvar{'lonDaemons'};
4264: unlink("$execdir/logs/lond.pid");
1.190 albertel 4265: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
1.165 albertel 4266: &status("Done killing children");
1.1 albertel 4267: exit; # clean up with dignity
4268: }
4269:
4270: sub HUPSMAN { # signal handler for SIGHUP
4271: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
1.165 albertel 4272: &status("Killing children for restart (HUP)");
1.1 albertel 4273: kill 'INT' => keys %children;
1.59 www 4274: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.190 albertel 4275: &logthis("<font color='red'>CRITICAL: Restarting</font>");
1.134 albertel 4276: my $execdir=$perlvar{'lonDaemons'};
1.30 harris41 4277: unlink("$execdir/logs/lond.pid");
1.165 albertel 4278: &status("Restarting self (HUP)");
1.1 albertel 4279: exec("$execdir/lond"); # here we go again
4280: }
4281:
1.144 foxr 4282: #
1.148 foxr 4283: # Kill off hashes that describe the host table prior to re-reading it.
4284: # Hashes affected are:
1.200 matthew 4285: # %hostid, %hostdom %hostip %hostdns.
1.148 foxr 4286: #
4287: sub KillHostHashes {
4288: foreach my $key (keys %hostid) {
4289: delete $hostid{$key};
4290: }
4291: foreach my $key (keys %hostdom) {
4292: delete $hostdom{$key};
4293: }
4294: foreach my $key (keys %hostip) {
4295: delete $hostip{$key};
4296: }
1.200 matthew 4297: foreach my $key (keys %hostdns) {
4298: delete $hostdns{$key};
4299: }
1.148 foxr 4300: }
4301: #
4302: # Read in the host table from file and distribute it into the various hashes:
4303: #
4304: # - %hostid - Indexed by IP, the loncapa hostname.
4305: # - %hostdom - Indexed by loncapa hostname, the domain.
4306: # - %hostip - Indexed by hostid, the Ip address of the host.
4307: sub ReadHostTable {
4308:
4309: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
1.200 matthew 4310: my $myloncapaname = $perlvar{'lonHostID'};
4311: Debug("My loncapa name is : $myloncapaname");
1.148 foxr 4312: while (my $configline=<CONFIG>) {
1.178 foxr 4313: if (!($configline =~ /^\s*\#/)) {
4314: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
4315: chomp($ip); $ip=~s/\D+$//;
1.200 matthew 4316: $hostid{$ip}=$id; # LonCAPA name of host by IP.
4317: $hostdom{$id}=$domain; # LonCAPA domain name of host.
4318: $hostip{$id}=$ip; # IP address of host.
4319: $hostdns{$name} = $id; # LonCAPA name of host by DNS.
4320:
4321: if ($id eq $perlvar{'lonHostID'}) {
4322: Debug("Found me in the host table: $name");
4323: $thisserver=$name;
4324: }
1.178 foxr 4325: }
1.148 foxr 4326: }
4327: close(CONFIG);
4328: }
4329: #
4330: # Reload the Apache daemon's state.
1.150 foxr 4331: # This is done by invoking /home/httpd/perl/apachereload
4332: # a setuid perl script that can be root for us to do this job.
1.148 foxr 4333: #
4334: sub ReloadApache {
1.150 foxr 4335: my $execdir = $perlvar{'lonDaemons'};
4336: my $script = $execdir."/apachereload";
4337: system($script);
1.148 foxr 4338: }
4339:
4340: #
1.144 foxr 4341: # Called in response to a USR2 signal.
4342: # - Reread hosts.tab
4343: # - All children connected to hosts that were removed from hosts.tab
4344: # are killed via SIGINT
4345: # - All children connected to previously existing hosts are sent SIGUSR1
4346: # - Our internal hosts hash is updated to reflect the new contents of
4347: # hosts.tab causing connections from hosts added to hosts.tab to
4348: # now be honored.
4349: #
4350: sub UpdateHosts {
1.165 albertel 4351: &status("Reload hosts.tab");
1.147 foxr 4352: logthis('<font color="blue"> Updating connections </font>');
1.148 foxr 4353: #
4354: # The %children hash has the set of IP's we currently have children
4355: # on. These need to be matched against records in the hosts.tab
4356: # Any ip's no longer in the table get killed off they correspond to
4357: # either dropped or changed hosts. Note that the re-read of the table
4358: # will take care of new and changed hosts as connections come into being.
4359:
4360:
4361: KillHostHashes;
4362: ReadHostTable;
4363:
4364: foreach my $child (keys %children) {
4365: my $childip = $children{$child};
4366: if(!$hostid{$childip}) {
1.149 foxr 4367: logthis('<font color="blue"> UpdateHosts killing child '
4368: ." $child for ip $childip </font>");
1.148 foxr 4369: kill('INT', $child);
1.149 foxr 4370: } else {
4371: logthis('<font color="green"> keeping child for ip '
4372: ." $childip (pid=$child) </font>");
1.148 foxr 4373: }
4374: }
4375: ReloadApache;
1.165 albertel 4376: &status("Finished reloading hosts.tab");
1.144 foxr 4377: }
4378:
1.148 foxr 4379:
1.57 www 4380: sub checkchildren {
1.165 albertel 4381: &status("Checking on the children (sending signals)");
1.57 www 4382: &initnewstatus();
4383: &logstatus();
4384: &logthis('Going to check on the children');
1.134 albertel 4385: my $docdir=$perlvar{'lonDocRoot'};
1.61 harris41 4386: foreach (sort keys %children) {
1.221 albertel 4387: #sleep 1;
1.57 www 4388: unless (kill 'USR1' => $_) {
4389: &logthis ('Child '.$_.' is dead');
4390: &logstatus($$.' is dead');
1.221 albertel 4391: delete($children{$_});
1.57 www 4392: }
1.61 harris41 4393: }
1.63 www 4394: sleep 5;
1.212 foxr 4395: $SIG{ALRM} = sub { Debug("timeout");
4396: die "timeout"; };
1.113 albertel 4397: $SIG{__DIE__} = 'DEFAULT';
1.165 albertel 4398: &status("Checking on the children (waiting for reports)");
1.63 www 4399: foreach (sort keys %children) {
4400: unless (-e "$docdir/lon-status/londchld/$_.txt") {
1.113 albertel 4401: eval {
4402: alarm(300);
1.63 www 4403: &logthis('Child '.$_.' did not respond');
1.67 albertel 4404: kill 9 => $_;
1.131 albertel 4405: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
4406: #$subj="LON: $currenthostid killed lond process $_";
4407: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
4408: #$execdir=$perlvar{'lonDaemons'};
4409: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
1.221 albertel 4410: delete($children{$_});
1.113 albertel 4411: alarm(0);
4412: }
1.63 www 4413: }
4414: }
1.113 albertel 4415: $SIG{ALRM} = 'DEFAULT';
1.155 albertel 4416: $SIG{__DIE__} = \&catchexception;
1.165 albertel 4417: &status("Finished checking children");
1.221 albertel 4418: &logthis('Finished Checking children');
1.57 www 4419: }
4420:
1.1 albertel 4421: # --------------------------------------------------------------------- Logging
4422:
4423: sub logthis {
4424: my $message=shift;
4425: my $execdir=$perlvar{'lonDaemons'};
4426: my $fh=IO::File->new(">>$execdir/logs/lond.log");
4427: my $now=time;
4428: my $local=localtime($now);
1.58 www 4429: $lastlog=$local.': '.$message;
1.1 albertel 4430: print $fh "$local ($$): $message\n";
4431: }
4432:
1.77 foxr 4433: # ------------------------- Conditional log if $DEBUG true.
4434: sub Debug {
4435: my $message = shift;
4436: if($DEBUG) {
4437: &logthis($message);
4438: }
4439: }
1.161 foxr 4440:
4441: #
4442: # Sub to do replies to client.. this gives a hook for some
4443: # debug tracing too:
4444: # Parameters:
4445: # fd - File open on client.
4446: # reply - Text to send to client.
4447: # request - Original request from client.
4448: #
4449: sub Reply {
1.192 foxr 4450: my ($fd, $reply, $request) = @_;
1.161 foxr 4451: print $fd $reply;
4452: Debug("Request was $request Reply was $reply");
4453:
1.212 foxr 4454: $Transactions++;
4455:
4456:
4457: }
4458:
4459:
4460: #
4461: # Sub to report a failure.
4462: # This function:
4463: # - Increments the failure statistic counters.
4464: # - Invokes Reply to send the error message to the client.
4465: # Parameters:
4466: # fd - File descriptor open on the client
4467: # reply - Reply text to emit.
4468: # request - The original request message (used by Reply
4469: # to debug if that's enabled.
4470: # Implicit outputs:
4471: # $Failures- The number of failures is incremented.
4472: # Reply (invoked here) sends a message to the
4473: # client:
4474: #
4475: sub Failure {
4476: my $fd = shift;
4477: my $reply = shift;
4478: my $request = shift;
4479:
4480: $Failures++;
4481: Reply($fd, $reply, $request); # That's simple eh?
1.161 foxr 4482: }
1.57 www 4483: # ------------------------------------------------------------------ Log status
4484:
4485: sub logstatus {
1.178 foxr 4486: &status("Doing logging");
4487: my $docdir=$perlvar{'lonDocRoot'};
4488: {
4489: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
1.200 matthew 4490: print $fh $status."\n".$lastlog."\n".time."\n$keymode";
1.178 foxr 4491: $fh->close();
4492: }
1.221 albertel 4493: &status("Finished $$.txt");
4494: {
4495: open(LOG,">>$docdir/lon-status/londstatus.txt");
4496: flock(LOG,LOCK_EX);
4497: print LOG $$."\t".$clientname."\t".$currenthostid."\t"
4498: .$status."\t".$lastlog."\t $keymode\n";
4499: flock(DB,LOCK_UN);
4500: close(LOG);
4501: }
1.178 foxr 4502: &status("Finished logging");
1.57 www 4503: }
4504:
4505: sub initnewstatus {
4506: my $docdir=$perlvar{'lonDocRoot'};
4507: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
4508: my $now=time;
4509: my $local=localtime($now);
4510: print $fh "LOND status $local - parent $$\n\n";
1.64 www 4511: opendir(DIR,"$docdir/lon-status/londchld");
1.134 albertel 4512: while (my $filename=readdir(DIR)) {
1.64 www 4513: unlink("$docdir/lon-status/londchld/$filename");
4514: }
4515: closedir(DIR);
1.57 www 4516: }
4517:
4518: # -------------------------------------------------------------- Status setting
4519:
4520: sub status {
4521: my $what=shift;
4522: my $now=time;
4523: my $local=localtime($now);
1.178 foxr 4524: $status=$local.': '.$what;
4525: $0='lond: '.$what.' '.$local;
1.57 www 4526: }
1.11 www 4527:
4528: # -------------------------------------------------------- Escape Special Chars
4529:
4530: sub escape {
4531: my $str=shift;
4532: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
4533: return $str;
4534: }
4535:
4536: # ----------------------------------------------------- Un-Escape Special Chars
4537:
4538: sub unescape {
4539: my $str=shift;
4540: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
4541: return $str;
4542: }
4543:
1.1 albertel 4544: # ----------------------------------------------------------- Send USR1 to lonc
4545:
4546: sub reconlonc {
4547: my $peerfile=shift;
4548: &logthis("Trying to reconnect for $peerfile");
4549: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
4550: if (my $fh=IO::File->new("$loncfile")) {
4551: my $loncpid=<$fh>;
4552: chomp($loncpid);
4553: if (kill 0 => $loncpid) {
4554: &logthis("lonc at pid $loncpid responding, sending USR1");
4555: kill USR1 => $loncpid;
4556: } else {
1.9 www 4557: &logthis(
1.190 albertel 4558: "<font color='red'>CRITICAL: "
1.9 www 4559: ."lonc at pid $loncpid not responding, giving up</font>");
1.1 albertel 4560: }
4561: } else {
1.190 albertel 4562: &logthis('<font color="red">CRITICAL: lonc not running, giving up</font>');
1.1 albertel 4563: }
4564: }
4565:
4566: # -------------------------------------------------- Non-critical communication
1.11 www 4567:
1.1 albertel 4568: sub subreply {
4569: my ($cmd,$server)=@_;
4570: my $peerfile="$perlvar{'lonSockDir'}/$server";
4571: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
4572: Type => SOCK_STREAM,
4573: Timeout => 10)
4574: or return "con_lost";
4575: print $sclient "$cmd\n";
4576: my $answer=<$sclient>;
4577: chomp($answer);
4578: if (!$answer) { $answer="con_lost"; }
4579: return $answer;
4580: }
4581:
4582: sub reply {
4583: my ($cmd,$server)=@_;
4584: my $answer;
1.115 albertel 4585: if ($server ne $currenthostid) {
1.1 albertel 4586: $answer=subreply($cmd,$server);
4587: if ($answer eq 'con_lost') {
4588: $answer=subreply("ping",$server);
4589: if ($answer ne $server) {
1.115 albertel 4590: &logthis("sub reply: answer != server answer is $answer, server is $server");
1.1 albertel 4591: &reconlonc("$perlvar{'lonSockDir'}/$server");
4592: }
4593: $answer=subreply($cmd,$server);
4594: }
4595: } else {
4596: $answer='self_reply';
4597: }
4598: return $answer;
4599: }
4600:
1.13 www 4601: # -------------------------------------------------------------- Talk to lonsql
4602:
1.234 foxr 4603: sub sql_reply {
1.12 harris41 4604: my ($cmd)=@_;
1.234 foxr 4605: my $answer=&sub_sql_reply($cmd);
4606: if ($answer eq 'con_lost') { $answer=&sub_sql_reply($cmd); }
1.12 harris41 4607: return $answer;
4608: }
4609:
1.234 foxr 4610: sub sub_sql_reply {
1.12 harris41 4611: my ($cmd)=@_;
4612: my $unixsock="mysqlsock";
4613: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
4614: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
4615: Type => SOCK_STREAM,
4616: Timeout => 10)
4617: or return "con_lost";
4618: print $sclient "$cmd\n";
4619: my $answer=<$sclient>;
4620: chomp($answer);
4621: if (!$answer) { $answer="con_lost"; }
4622: return $answer;
4623: }
4624:
1.1 albertel 4625: # -------------------------------------------- Return path to profile directory
1.11 www 4626:
1.1 albertel 4627: sub propath {
4628: my ($udom,$uname)=@_;
4629: $udom=~s/\W//g;
4630: $uname=~s/\W//g;
1.16 www 4631: my $subdir=$uname.'__';
1.1 albertel 4632: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
4633: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
4634: return $proname;
4635: }
4636:
4637: # --------------------------------------- Is this the home server of an author?
1.11 www 4638:
1.1 albertel 4639: sub ishome {
4640: my $author=shift;
4641: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
4642: my ($udom,$uname)=split(/\//,$author);
4643: my $proname=propath($udom,$uname);
4644: if (-e $proname) {
4645: return 'owner';
4646: } else {
4647: return 'not_owner';
4648: }
4649: }
4650:
4651: # ======================================================= Continue main program
4652: # ---------------------------------------------------- Fork once and dissociate
4653:
1.134 albertel 4654: my $fpid=fork;
1.1 albertel 4655: exit if $fpid;
1.29 harris41 4656: die "Couldn't fork: $!" unless defined ($fpid);
1.1 albertel 4657:
1.29 harris41 4658: POSIX::setsid() or die "Can't start new session: $!";
1.1 albertel 4659:
4660: # ------------------------------------------------------- Write our PID on disk
4661:
1.134 albertel 4662: my $execdir=$perlvar{'lonDaemons'};
1.1 albertel 4663: open (PIDSAVE,">$execdir/logs/lond.pid");
4664: print PIDSAVE "$$\n";
4665: close(PIDSAVE);
1.190 albertel 4666: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
1.57 www 4667: &status('Starting');
1.1 albertel 4668:
1.106 foxr 4669:
1.1 albertel 4670:
4671: # ----------------------------------------------------- Install signal handlers
4672:
1.57 www 4673:
1.1 albertel 4674: $SIG{CHLD} = \&REAPER;
4675: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
4676: $SIG{HUP} = \&HUPSMAN;
1.57 www 4677: $SIG{USR1} = \&checkchildren;
1.144 foxr 4678: $SIG{USR2} = \&UpdateHosts;
1.106 foxr 4679:
1.148 foxr 4680: # Read the host hashes:
4681:
4682: ReadHostTable;
1.106 foxr 4683:
4684: # --------------------------------------------------------------
4685: # Accept connections. When a connection comes in, it is validated
4686: # and if good, a child process is created to process transactions
4687: # along the connection.
4688:
1.1 albertel 4689: while (1) {
1.165 albertel 4690: &status('Starting accept');
1.106 foxr 4691: $client = $server->accept() or next;
1.165 albertel 4692: &status('Accepted '.$client.' off to spawn');
1.106 foxr 4693: make_new_child($client);
1.165 albertel 4694: &status('Finished spawning');
1.1 albertel 4695: }
4696:
1.212 foxr 4697: sub make_new_child {
4698: my $pid;
4699: # my $cipher; # Now global
4700: my $sigset;
1.178 foxr 4701:
1.212 foxr 4702: $client = shift;
4703: &status('Starting new child '.$client);
4704: &logthis('<font color="green"> Attempting to start child ('.$client.
4705: ")</font>");
4706: # block signal for fork
4707: $sigset = POSIX::SigSet->new(SIGINT);
4708: sigprocmask(SIG_BLOCK, $sigset)
4709: or die "Can't block SIGINT for fork: $!\n";
1.178 foxr 4710:
1.212 foxr 4711: die "fork: $!" unless defined ($pid = fork);
1.178 foxr 4712:
1.212 foxr 4713: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
4714: # connection liveness.
1.178 foxr 4715:
1.212 foxr 4716: #
4717: # Figure out who we're talking to so we can record the peer in
4718: # the pid hash.
4719: #
4720: my $caller = getpeername($client);
4721: my ($port,$iaddr);
4722: if (defined($caller) && length($caller) > 0) {
4723: ($port,$iaddr)=unpack_sockaddr_in($caller);
4724: } else {
4725: &logthis("Unable to determine who caller was, getpeername returned nothing");
4726: }
4727: if (defined($iaddr)) {
4728: $clientip = inet_ntoa($iaddr);
4729: Debug("Connected with $clientip");
4730: $clientdns = gethostbyaddr($iaddr, AF_INET);
4731: Debug("Connected with $clientdns by name");
4732: } else {
4733: &logthis("Unable to determine clientip");
4734: $clientip='Unavailable';
4735: }
4736:
4737: if ($pid) {
4738: # Parent records the child's birth and returns.
4739: sigprocmask(SIG_UNBLOCK, $sigset)
4740: or die "Can't unblock SIGINT for fork: $!\n";
4741: $children{$pid} = $clientip;
4742: &status('Started child '.$pid);
4743: return;
4744: } else {
4745: # Child can *not* return from this subroutine.
4746: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
4747: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
4748: #don't get intercepted
4749: $SIG{USR1}= \&logstatus;
4750: $SIG{ALRM}= \&timeout;
4751: $lastlog='Forked ';
4752: $status='Forked';
1.178 foxr 4753:
1.212 foxr 4754: # unblock signals
4755: sigprocmask(SIG_UNBLOCK, $sigset)
4756: or die "Can't unblock SIGINT for fork: $!\n";
1.178 foxr 4757:
1.212 foxr 4758: # my $tmpsnum=0; # Now global
4759: #---------------------------------------------------- kerberos 5 initialization
4760: &Authen::Krb5::init_context();
4761: &Authen::Krb5::init_ets();
1.209 albertel 4762:
1.212 foxr 4763: &status('Accepted connection');
4764: # =============================================================================
4765: # do something with the connection
4766: # -----------------------------------------------------------------------------
4767: # see if we know client and 'check' for spoof IP by ineffective challenge
1.178 foxr 4768:
1.212 foxr 4769: ReadManagerTable; # May also be a manager!!
4770:
4771: my $clientrec=($hostid{$clientip} ne undef);
4772: my $ismanager=($managers{$clientip} ne undef);
4773: $clientname = "[unknonwn]";
4774: if($clientrec) { # Establish client type.
4775: $ConnectionType = "client";
4776: $clientname = $hostid{$clientip};
4777: if($ismanager) {
4778: $ConnectionType = "both";
4779: }
4780: } else {
4781: $ConnectionType = "manager";
4782: $clientname = $managers{$clientip};
4783: }
4784: my $clientok;
1.178 foxr 4785:
1.212 foxr 4786: if ($clientrec || $ismanager) {
4787: &status("Waiting for init from $clientip $clientname");
4788: &logthis('<font color="yellow">INFO: Connection, '.
4789: $clientip.
4790: " ($clientname) connection type = $ConnectionType </font>" );
4791: &status("Connecting $clientip ($clientname))");
4792: my $remotereq=<$client>;
4793: chomp($remotereq);
4794: Debug("Got init: $remotereq");
4795: my $inikeyword = split(/:/, $remotereq);
4796: if ($remotereq =~ /^init/) {
4797: &sethost("sethost:$perlvar{'lonHostID'}");
4798: #
4799: # If the remote is attempting a local init... give that a try:
4800: #
4801: my ($i, $inittype) = split(/:/, $remotereq);
1.209 albertel 4802:
1.212 foxr 4803: # If the connection type is ssl, but I didn't get my
4804: # certificate files yet, then I'll drop back to
4805: # insecure (if allowed).
4806:
4807: if($inittype eq "ssl") {
4808: my ($ca, $cert) = lonssl::CertificateFile;
4809: my $kfile = lonssl::KeyFile;
4810: if((!$ca) ||
4811: (!$cert) ||
4812: (!$kfile)) {
4813: $inittype = ""; # This forces insecure attempt.
4814: &logthis("<font color=\"blue\"> Certificates not "
4815: ."installed -- trying insecure auth</font>");
1.224 foxr 4816: } else { # SSL certificates are in place so
1.212 foxr 4817: } # Leave the inittype alone.
4818: }
4819:
4820: if($inittype eq "local") {
4821: my $key = LocalConnection($client, $remotereq);
4822: if($key) {
4823: Debug("Got local key $key");
4824: $clientok = 1;
4825: my $cipherkey = pack("H32", $key);
4826: $cipher = new IDEA($cipherkey);
4827: print $client "ok:local\n";
4828: &logthis('<font color="green"'
4829: . "Successful local authentication </font>");
4830: $keymode = "local"
1.178 foxr 4831: } else {
1.212 foxr 4832: Debug("Failed to get local key");
4833: $clientok = 0;
4834: shutdown($client, 3);
4835: close $client;
1.178 foxr 4836: }
1.212 foxr 4837: } elsif ($inittype eq "ssl") {
4838: my $key = SSLConnection($client);
4839: if ($key) {
4840: $clientok = 1;
4841: my $cipherkey = pack("H32", $key);
4842: $cipher = new IDEA($cipherkey);
4843: &logthis('<font color="green">'
4844: ."Successfull ssl authentication with $clientname </font>");
4845: $keymode = "ssl";
4846:
1.178 foxr 4847: } else {
1.212 foxr 4848: $clientok = 0;
4849: close $client;
1.178 foxr 4850: }
1.212 foxr 4851:
4852: } else {
4853: my $ok = InsecureConnection($client);
4854: if($ok) {
4855: $clientok = 1;
4856: &logthis('<font color="green">'
4857: ."Successful insecure authentication with $clientname </font>");
4858: print $client "ok\n";
4859: $keymode = "insecure";
1.178 foxr 4860: } else {
1.212 foxr 4861: &logthis('<font color="yellow">'
4862: ."Attempted insecure connection disallowed </font>");
4863: close $client;
4864: $clientok = 0;
1.178 foxr 4865:
4866: }
4867: }
1.212 foxr 4868: } else {
4869: &logthis(
4870: "<font color='blue'>WARNING: "
4871: ."$clientip failed to initialize: >$remotereq< </font>");
4872: &status('No init '.$clientip);
4873: }
4874:
4875: } else {
4876: &logthis(
4877: "<font color='blue'>WARNING: Unknown client $clientip</font>");
4878: &status('Hung up on '.$clientip);
4879: }
4880:
4881: if ($clientok) {
4882: # ---------------- New known client connecting, could mean machine online again
4883:
4884: foreach my $id (keys(%hostip)) {
4885: if ($hostip{$id} ne $clientip ||
4886: $hostip{$currenthostid} eq $clientip) {
4887: # no need to try to do recon's to myself
4888: next;
4889: }
4890: &reconlonc("$perlvar{'lonSockDir'}/$id");
4891: }
4892: &logthis("<font color='green'>Established connection: $clientname</font>");
4893: &status('Will listen to '.$clientname);
4894: # ------------------------------------------------------------ Process requests
4895: my $keep_going = 1;
4896: my $user_input;
4897: while(($user_input = get_request) && $keep_going) {
4898: alarm(120);
4899: Debug("Main: Got $user_input\n");
4900: $keep_going = &process_request($user_input);
1.178 foxr 4901: alarm(0);
1.212 foxr 4902: &status('Listening to '.$clientname." ($keymode)");
1.161 foxr 4903: }
1.212 foxr 4904:
1.59 www 4905: # --------------------------------------------- client unknown or fishy, refuse
1.212 foxr 4906: } else {
1.161 foxr 4907: print $client "refused\n";
4908: $client->close();
1.190 albertel 4909: &logthis("<font color='blue'>WARNING: "
1.161 foxr 4910: ."Rejected client $clientip, closing connection</font>");
4911: }
1.212 foxr 4912: }
1.161 foxr 4913:
1.1 albertel 4914: # =============================================================================
1.161 foxr 4915:
1.190 albertel 4916: &logthis("<font color='red'>CRITICAL: "
1.161 foxr 4917: ."Disconnect from $clientip ($clientname)</font>");
4918:
4919:
4920: # this exit is VERY important, otherwise the child will become
4921: # a producer of more and more children, forking yourself into
4922: # process death.
4923: exit;
1.106 foxr 4924:
1.78 foxr 4925: }
4926:
4927:
4928: #
4929: # Checks to see if the input roleput request was to set
4930: # an author role. If so, invokes the lchtmldir script to set
4931: # up a correct public_html
4932: # Parameters:
4933: # request - The request sent to the rolesput subchunk.
4934: # We're looking for /domain/_au
4935: # domain - The domain in which the user is having roles doctored.
4936: # user - Name of the user for which the role is being put.
4937: # authtype - The authentication type associated with the user.
4938: #
1.230 foxr 4939: sub manage_permissions
1.78 foxr 4940: {
1.192 foxr 4941:
4942: my ($request, $domain, $user, $authtype) = @_;
1.78 foxr 4943:
4944: # See if the request is of the form /$domain/_au
4945: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
4946: my $execdir = $perlvar{'lonDaemons'};
4947: my $userhome= "/home/$user" ;
1.134 albertel 4948: &logthis("system $execdir/lchtmldir $userhome $user $authtype");
1.78 foxr 4949: system("$execdir/lchtmldir $userhome $user $authtype");
4950: }
4951: }
1.222 foxr 4952:
4953:
4954: #
4955: # Return the full path of a user password file, whether it exists or not.
4956: # Parameters:
4957: # domain - Domain in which the password file lives.
4958: # user - name of the user.
4959: # Returns:
4960: # Full passwd path:
4961: #
4962: sub password_path {
4963: my ($domain, $user) = @_;
4964:
4965:
4966: my $path = &propath($domain, $user);
4967: $path .= "/passwd";
4968:
4969: return $path;
4970: }
4971:
4972: # Password Filename
4973: # Returns the path to a passwd file given domain and user... only if
4974: # it exists.
4975: # Parameters:
4976: # domain - Domain in which to search.
4977: # user - username.
4978: # Returns:
4979: # - If the password file exists returns its path.
4980: # - If the password file does not exist, returns undefined.
4981: #
4982: sub password_filename {
4983: my ($domain, $user) = @_;
4984:
4985: Debug ("PasswordFilename called: dom = $domain user = $user");
4986:
4987: my $path = &password_path($domain, $user);
4988: Debug("PasswordFilename got path: $path");
4989: if(-e $path) {
4990: return $path;
4991: } else {
4992: return undef;
4993: }
4994: }
4995:
4996: #
4997: # Rewrite the contents of the user's passwd file.
4998: # Parameters:
4999: # domain - domain of the user.
5000: # name - User's name.
5001: # contents - New contents of the file.
5002: # Returns:
5003: # 0 - Failed.
5004: # 1 - Success.
5005: #
5006: sub rewrite_password_file {
5007: my ($domain, $user, $contents) = @_;
5008:
5009: my $file = &password_filename($domain, $user);
5010: if (defined $file) {
5011: my $pf = IO::File->new(">$file");
5012: if($pf) {
5013: print $pf "$contents\n";
5014: return 1;
5015: } else {
5016: return 0;
5017: }
5018: } else {
5019: return 0;
5020: }
5021:
5022: }
5023:
1.78 foxr 5024: #
1.222 foxr 5025: # get_auth_type - Determines the authorization type of a user in a domain.
1.78 foxr 5026:
5027: # Returns the authorization type or nouser if there is no such user.
5028: #
1.222 foxr 5029: sub get_auth_type
1.78 foxr 5030: {
1.192 foxr 5031:
5032: my ($domain, $user) = @_;
1.78 foxr 5033:
1.222 foxr 5034: Debug("get_auth_type( $domain, $user ) \n");
1.78 foxr 5035: my $proname = &propath($domain, $user);
5036: my $passwdfile = "$proname/passwd";
5037: if( -e $passwdfile ) {
5038: my $pf = IO::File->new($passwdfile);
5039: my $realpassword = <$pf>;
5040: chomp($realpassword);
1.79 foxr 5041: Debug("Password info = $realpassword\n");
1.78 foxr 5042: my ($authtype, $contentpwd) = split(/:/, $realpassword);
1.79 foxr 5043: Debug("Authtype = $authtype, content = $contentpwd\n");
1.78 foxr 5044: my $availinfo = '';
1.91 albertel 5045: if($authtype eq 'krb4' or $authtype eq 'krb5') {
1.78 foxr 5046: $availinfo = $contentpwd;
5047: }
1.79 foxr 5048:
1.78 foxr 5049: return "$authtype:$availinfo";
1.224 foxr 5050: } else {
1.79 foxr 5051: Debug("Returning nouser");
1.78 foxr 5052: return "nouser";
5053: }
1.1 albertel 5054: }
5055:
1.220 foxr 5056: #
5057: # Validate a user given their domain, name and password. This utility
5058: # function is used by both AuthenticateHandler and ChangePasswordHandler
5059: # to validate the login credentials of a user.
5060: # Parameters:
5061: # $domain - The domain being logged into (this is required due to
5062: # the capability for multihomed systems.
5063: # $user - The name of the user being validated.
5064: # $password - The user's propoposed password.
5065: #
5066: # Returns:
5067: # 1 - The domain,user,pasword triplet corresponds to a valid
5068: # user.
5069: # 0 - The domain,user,password triplet is not a valid user.
5070: #
5071: sub validate_user {
5072: my ($domain, $user, $password) = @_;
5073:
5074:
5075: # Why negative ~pi you may well ask? Well this function is about
5076: # authentication, and therefore very important to get right.
5077: # I've initialized the flag that determines whether or not I've
5078: # validated correctly to a value it's not supposed to get.
5079: # At the end of this function. I'll ensure that it's not still that
5080: # value so we don't just wind up returning some accidental value
5081: # as a result of executing an unforseen code path that
1.249 foxr 5082: # did not set $validated. At the end of valid execution paths,
5083: # validated shoule be 1 for success or 0 for failuer.
1.220 foxr 5084:
5085: my $validated = -3.14159;
5086:
5087: # How we authenticate is determined by the type of authentication
5088: # the user has been assigned. If the authentication type is
5089: # "nouser", the user does not exist so we will return 0.
5090:
1.222 foxr 5091: my $contents = &get_auth_type($domain, $user);
1.220 foxr 5092: my ($howpwd, $contentpwd) = split(/:/, $contents);
5093:
5094: my $null = pack("C",0); # Used by kerberos auth types.
5095:
5096: if ($howpwd ne 'nouser') {
5097:
5098: if($howpwd eq "internal") { # Encrypted is in local password file.
5099: $validated = (crypt($password, $contentpwd) eq $contentpwd);
5100: }
5101: elsif ($howpwd eq "unix") { # User is a normal unix user.
5102: $contentpwd = (getpwnam($user))[1];
5103: if($contentpwd) {
5104: if($contentpwd eq 'x') { # Shadow password file...
5105: my $pwauth_path = "/usr/local/sbin/pwauth";
5106: open PWAUTH, "|$pwauth_path" or
5107: die "Cannot invoke authentication";
5108: print PWAUTH "$user\n$password\n";
5109: close PWAUTH;
5110: $validated = ! $?;
5111:
5112: } else { # Passwords in /etc/passwd.
5113: $validated = (crypt($password,
5114: $contentpwd) eq $contentpwd);
5115: }
5116: } else {
5117: $validated = 0;
5118: }
5119: }
5120: elsif ($howpwd eq "krb4") { # user is in kerberos 4 auth. domain.
5121: if(! ($password =~ /$null/) ) {
5122: my $k4error = &Authen::Krb4::get_pw_in_tkt($user,
5123: "",
5124: $contentpwd,,
5125: 'krbtgt',
5126: $contentpwd,
5127: 1,
5128: $password);
5129: if(!$k4error) {
5130: $validated = 1;
1.224 foxr 5131: } else {
1.220 foxr 5132: $validated = 0;
5133: &logthis('krb4: '.$user.', '.$contentpwd.', '.
5134: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
5135: }
1.224 foxr 5136: } else {
1.220 foxr 5137: $validated = 0; # Password has a match with null.
5138: }
1.224 foxr 5139: } elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain.
1.220 foxr 5140: if(!($password =~ /$null/)) { # Null password not allowed.
5141: my $krbclient = &Authen::Krb5::parse_name($user.'@'
5142: .$contentpwd);
5143: my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd;
5144: my $krbserver = &Authen::Krb5::parse_name($krbservice);
5145: my $credentials= &Authen::Krb5::cc_default();
5146: $credentials->initialize($krbclient);
5147: my $krbreturn = &Authen::KRb5::get_in_tkt_with_password($krbclient,
5148: $krbserver,
5149: $password,
5150: $credentials);
5151: $validated = ($krbreturn == 1);
1.224 foxr 5152: } else {
1.220 foxr 5153: $validated = 0;
5154: }
1.224 foxr 5155: } elsif ($howpwd eq "localauth") {
1.220 foxr 5156: # Authenticate via installation specific authentcation method:
5157: $validated = &localauth::localauth($user,
5158: $password,
5159: $contentpwd);
1.224 foxr 5160: } else { # Unrecognized auth is also bad.
1.220 foxr 5161: $validated = 0;
5162: }
5163: } else {
5164: $validated = 0;
5165: }
5166: #
5167: # $validated has the correct stat of the authentication:
5168: #
5169:
5170: unless ($validated != -3.14159) {
1.249 foxr 5171: # I >really really< want to know if this happens.
5172: # since it indicates that user authentication is badly
5173: # broken in some code path.
5174: #
5175: die "ValidateUser - failed to set the value of validated $domain, $user $password";
1.220 foxr 5176: }
5177: return $validated;
5178: }
5179:
5180:
1.84 albertel 5181: sub addline {
5182: my ($fname,$hostid,$ip,$newline)=@_;
5183: my $contents;
5184: my $found=0;
5185: my $expr='^'.$hostid.':'.$ip.':';
5186: $expr =~ s/\./\\\./g;
1.134 albertel 5187: my $sh;
1.84 albertel 5188: if ($sh=IO::File->new("$fname.subscription")) {
5189: while (my $subline=<$sh>) {
5190: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
5191: }
5192: $sh->close();
5193: }
5194: $sh=IO::File->new(">$fname.subscription");
5195: if ($contents) { print $sh $contents; }
5196: if ($newline) { print $sh $newline; }
5197: $sh->close();
5198: return $found;
1.86 www 5199: }
5200:
1.234 foxr 5201: sub get_chat {
1.122 www 5202: my ($cdom,$cname,$udom,$uname)=@_;
1.87 www 5203: my %hash;
5204: my $proname=&propath($cdom,$cname);
5205: my @entries=();
1.88 albertel 5206: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
5207: &GDBM_READER(),0640)) {
5208: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
5209: untie %hash;
1.123 www 5210: }
1.124 www 5211: my @participants=();
1.134 albertel 5212: my $cutoff=time-60;
1.123 www 5213: if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db",
1.124 www 5214: &GDBM_WRCREAT(),0640)) {
5215: $hash{$uname.':'.$udom}=time;
1.123 www 5216: foreach (sort keys %hash) {
5217: if ($hash{$_}>$cutoff) {
1.124 www 5218: $participants[$#participants+1]='active_participant:'.$_;
1.123 www 5219: }
5220: }
5221: untie %hash;
1.86 www 5222: }
1.124 www 5223: return (@participants,@entries);
1.86 www 5224: }
5225:
1.234 foxr 5226: sub chat_add {
1.88 albertel 5227: my ($cdom,$cname,$newchat)=@_;
5228: my %hash;
5229: my $proname=&propath($cdom,$cname);
5230: my @entries=();
1.142 www 5231: my $time=time;
1.88 albertel 5232: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
5233: &GDBM_WRCREAT(),0640)) {
5234: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
5235: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
5236: my ($thentime,$idnum)=split(/\_/,$lastid);
5237: my $newid=$time.'_000000';
5238: if ($thentime==$time) {
5239: $idnum=~s/^0+//;
5240: $idnum++;
5241: $idnum=substr('000000'.$idnum,-6,6);
5242: $newid=$time.'_'.$idnum;
5243: }
5244: $hash{$newid}=$newchat;
5245: my $expired=$time-3600;
5246: foreach (keys %hash) {
5247: my ($thistime)=($_=~/(\d+)\_/);
5248: if ($thistime<$expired) {
1.89 www 5249: delete $hash{$_};
1.88 albertel 5250: }
5251: }
5252: untie %hash;
1.142 www 5253: }
5254: {
5255: my $hfh;
5256: if ($hfh=IO::File->new(">>$proname/chatroom.log")) {
5257: print $hfh "$time:".&unescape($newchat)."\n";
5258: }
1.86 www 5259: }
1.84 albertel 5260: }
5261:
5262: sub unsub {
5263: my ($fname,$clientip)=@_;
5264: my $result;
1.188 foxr 5265: my $unsubs = 0; # Number of successful unsubscribes:
5266:
5267:
5268: # An old way subscriptions were handled was to have a
5269: # subscription marker file:
5270:
5271: Debug("Attempting unlink of $fname.$clientname");
1.161 foxr 5272: if (unlink("$fname.$clientname")) {
1.188 foxr 5273: $unsubs++; # Successful unsub via marker file.
5274: }
5275:
5276: # The more modern way to do it is to have a subscription list
5277: # file:
5278:
1.84 albertel 5279: if (-e "$fname.subscription") {
1.161 foxr 5280: my $found=&addline($fname,$clientname,$clientip,'');
1.188 foxr 5281: if ($found) {
5282: $unsubs++;
5283: }
5284: }
5285:
5286: # If either or both of these mechanisms succeeded in unsubscribing a
5287: # resource we can return ok:
5288:
5289: if($unsubs) {
5290: $result = "ok\n";
1.84 albertel 5291: } else {
1.188 foxr 5292: $result = "not_subscribed\n";
1.84 albertel 5293: }
1.188 foxr 5294:
1.84 albertel 5295: return $result;
5296: }
5297:
1.101 www 5298: sub currentversion {
5299: my $fname=shift;
5300: my $version=-1;
5301: my $ulsdir='';
5302: if ($fname=~/^(.+)\/[^\/]+$/) {
5303: $ulsdir=$1;
5304: }
1.114 albertel 5305: my ($fnamere1,$fnamere2);
5306: # remove version if already specified
1.101 www 5307: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
1.114 albertel 5308: # get the bits that go before and after the version number
5309: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
5310: $fnamere1=$1;
5311: $fnamere2='.'.$2;
5312: }
1.101 www 5313: if (-e $fname) { $version=1; }
5314: if (-e $ulsdir) {
1.134 albertel 5315: if(-d $ulsdir) {
5316: if (opendir(LSDIR,$ulsdir)) {
5317: my $ulsfn;
5318: while ($ulsfn=readdir(LSDIR)) {
1.101 www 5319: # see if this is a regular file (ignore links produced earlier)
1.134 albertel 5320: my $thisfile=$ulsdir.'/'.$ulsfn;
5321: unless (-l $thisfile) {
1.160 www 5322: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
1.134 albertel 5323: if ($1>$version) { $version=$1; }
5324: }
5325: }
5326: }
5327: closedir(LSDIR);
5328: $version++;
5329: }
5330: }
5331: }
5332: return $version;
1.101 www 5333: }
5334:
5335: sub thisversion {
5336: my $fname=shift;
5337: my $version=-1;
5338: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
5339: $version=$1;
5340: }
5341: return $version;
5342: }
5343:
1.84 albertel 5344: sub subscribe {
5345: my ($userinput,$clientip)=@_;
5346: my $result;
5347: my ($cmd,$fname)=split(/:/,$userinput);
5348: my $ownership=&ishome($fname);
5349: if ($ownership eq 'owner') {
1.101 www 5350: # explitly asking for the current version?
5351: unless (-e $fname) {
5352: my $currentversion=¤tversion($fname);
5353: if (&thisversion($fname)==$currentversion) {
5354: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
5355: my $root=$1;
5356: my $extension=$2;
5357: symlink($root.'.'.$extension,
5358: $root.'.'.$currentversion.'.'.$extension);
1.102 www 5359: unless ($extension=~/\.meta$/) {
5360: symlink($root.'.'.$extension.'.meta',
5361: $root.'.'.$currentversion.'.'.$extension.'.meta');
5362: }
1.101 www 5363: }
5364: }
5365: }
1.84 albertel 5366: if (-e $fname) {
5367: if (-d $fname) {
5368: $result="directory\n";
5369: } else {
1.161 foxr 5370: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
1.134 albertel 5371: my $now=time;
1.161 foxr 5372: my $found=&addline($fname,$clientname,$clientip,
5373: "$clientname:$clientip:$now\n");
1.84 albertel 5374: if ($found) { $result="$fname\n"; }
5375: # if they were subscribed to only meta data, delete that
5376: # subscription, when you subscribe to a file you also get
5377: # the metadata
5378: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
5379: $fname=~s/\/home\/httpd\/html\/res/raw/;
5380: $fname="http://$thisserver/".$fname;
5381: $result="$fname\n";
5382: }
5383: } else {
5384: $result="not_found\n";
5385: }
5386: } else {
5387: $result="rejected\n";
5388: }
5389: return $result;
5390: }
1.91 albertel 5391:
5392: sub make_passwd_file {
1.98 foxr 5393: my ($uname, $umode,$npass,$passfilename)=@_;
1.91 albertel 5394: my $result="ok\n";
5395: if ($umode eq 'krb4' or $umode eq 'krb5') {
5396: {
5397: my $pf = IO::File->new(">$passfilename");
5398: print $pf "$umode:$npass\n";
5399: }
5400: } elsif ($umode eq 'internal') {
5401: my $salt=time;
5402: $salt=substr($salt,6,2);
5403: my $ncpass=crypt($npass,$salt);
5404: {
5405: &Debug("Creating internal auth");
5406: my $pf = IO::File->new(">$passfilename");
5407: print $pf "internal:$ncpass\n";
5408: }
5409: } elsif ($umode eq 'localauth') {
5410: {
5411: my $pf = IO::File->new(">$passfilename");
5412: print $pf "localauth:$npass\n";
5413: }
5414: } elsif ($umode eq 'unix') {
5415: {
1.186 foxr 5416: #
5417: # Don't allow the creation of privileged accounts!!! that would
5418: # be real bad!!!
5419: #
5420: my $uid = getpwnam($uname);
5421: if((defined $uid) && ($uid == 0)) {
5422: &logthis(">>>Attempted to create privilged account blocked");
5423: return "no_priv_account_error\n";
5424: }
5425:
1.223 foxr 5426: my $execpath ="$perlvar{'lonDaemons'}/"."lcuseradd";
1.224 foxr 5427:
5428: my $lc_error_file = $execdir."/tmp/lcuseradd".$$.".status";
1.91 albertel 5429: {
5430: &Debug("Executing external: ".$execpath);
1.98 foxr 5431: &Debug("user = ".$uname.", Password =". $npass);
1.132 matthew 5432: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
1.91 albertel 5433: print $se "$uname\n";
5434: print $se "$npass\n";
5435: print $se "$npass\n";
1.223 foxr 5436: print $se "$lc_error_file\n"; # Status -> unique file.
1.97 foxr 5437: }
1.223 foxr 5438: my $error = IO::File->new("< $lc_error_file");
5439: my $useraddok = <$error>;
5440: $error->close;
5441: unlink($lc_error_file);
5442:
5443: chomp $useraddok;
5444:
1.97 foxr 5445: if($useraddok > 0) {
1.223 foxr 5446: my $error_text = &lcuseraddstrerror($useraddok);
5447: &logthis("Failed lcuseradd: $error_text");
5448: $result = "lcuseradd_failed:$error_text\n";
1.224 foxr 5449: } else {
1.223 foxr 5450: my $pf = IO::File->new(">$passfilename");
5451: print $pf "unix:\n";
1.91 albertel 5452: }
5453: }
5454: } elsif ($umode eq 'none') {
5455: {
1.223 foxr 5456: my $pf = IO::File->new("> $passfilename");
1.91 albertel 5457: print $pf "none:\n";
5458: }
5459: } else {
5460: $result="auth_mode_error\n";
5461: }
5462: return $result;
1.121 albertel 5463: }
5464:
5465: sub sethost {
5466: my ($remotereq) = @_;
5467: my (undef,$hostid)=split(/:/,$remotereq);
5468: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
5469: if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
1.200 matthew 5470: $currenthostid =$hostid;
1.121 albertel 5471: $currentdomainid=$hostdom{$hostid};
5472: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
5473: } else {
5474: &logthis("Requested host id $hostid not an alias of ".
5475: $perlvar{'lonHostID'}." refusing connection");
5476: return 'unable_to_set';
5477: }
5478: return 'ok';
5479: }
5480:
5481: sub version {
5482: my ($userinput)=@_;
5483: $remoteVERSION=(split(/:/,$userinput))[1];
5484: return "version:$VERSION";
1.127 albertel 5485: }
1.178 foxr 5486:
1.128 albertel 5487: #There is a copy of this in lonnet.pm
1.127 albertel 5488: sub userload {
5489: my $numusers=0;
5490: {
5491: opendir(LONIDS,$perlvar{'lonIDsDir'});
5492: my $filename;
5493: my $curtime=time;
5494: while ($filename=readdir(LONIDS)) {
5495: if ($filename eq '.' || $filename eq '..') {next;}
1.138 albertel 5496: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
1.159 albertel 5497: if ($curtime-$mtime < 1800) { $numusers++; }
1.127 albertel 5498: }
5499: closedir(LONIDS);
5500: }
5501: my $userloadpercent=0;
5502: my $maxuserload=$perlvar{'lonUserLoadLim'};
5503: if ($maxuserload) {
1.129 albertel 5504: $userloadpercent=100*$numusers/$maxuserload;
1.127 albertel 5505: }
1.130 albertel 5506: $userloadpercent=sprintf("%.2f",$userloadpercent);
1.127 albertel 5507: return $userloadpercent;
1.91 albertel 5508: }
5509:
1.205 raeburn 5510: # Routines for serializing arrays and hashes (copies from lonnet)
5511:
5512: sub array2str {
5513: my (@array) = @_;
5514: my $result=&arrayref2str(\@array);
5515: $result=~s/^__ARRAY_REF__//;
5516: $result=~s/__END_ARRAY_REF__$//;
5517: return $result;
5518: }
5519:
5520: sub arrayref2str {
5521: my ($arrayref) = @_;
5522: my $result='__ARRAY_REF__';
5523: foreach my $elem (@$arrayref) {
5524: if(ref($elem) eq 'ARRAY') {
5525: $result.=&arrayref2str($elem).'&';
5526: } elsif(ref($elem) eq 'HASH') {
5527: $result.=&hashref2str($elem).'&';
5528: } elsif(ref($elem)) {
5529: #print("Got a ref of ".(ref($elem))." skipping.");
5530: } else {
5531: $result.=&escape($elem).'&';
5532: }
5533: }
5534: $result=~s/\&$//;
5535: $result .= '__END_ARRAY_REF__';
5536: return $result;
5537: }
5538:
5539: sub hash2str {
5540: my (%hash) = @_;
5541: my $result=&hashref2str(\%hash);
5542: $result=~s/^__HASH_REF__//;
5543: $result=~s/__END_HASH_REF__$//;
5544: return $result;
5545: }
5546:
5547: sub hashref2str {
5548: my ($hashref)=@_;
5549: my $result='__HASH_REF__';
5550: foreach (sort(keys(%$hashref))) {
5551: if (ref($_) eq 'ARRAY') {
5552: $result.=&arrayref2str($_).'=';
5553: } elsif (ref($_) eq 'HASH') {
5554: $result.=&hashref2str($_).'=';
5555: } elsif (ref($_)) {
5556: $result.='=';
5557: #print("Got a ref of ".(ref($_))." skipping.");
5558: } else {
5559: if ($_) {$result.=&escape($_).'=';} else { last; }
5560: }
5561:
5562: if(ref($hashref->{$_}) eq 'ARRAY') {
5563: $result.=&arrayref2str($hashref->{$_}).'&';
5564: } elsif(ref($hashref->{$_}) eq 'HASH') {
5565: $result.=&hashref2str($hashref->{$_}).'&';
5566: } elsif(ref($hashref->{$_})) {
5567: $result.='&';
5568: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
5569: } else {
5570: $result.=&escape($hashref->{$_}).'&';
5571: }
5572: }
5573: $result=~s/\&$//;
5574: $result .= '__END_HASH_REF__';
5575: return $result;
5576: }
1.200 matthew 5577:
1.61 harris41 5578: # ----------------------------------- POD (plain old documentation, CPAN style)
5579:
5580: =head1 NAME
5581:
5582: lond - "LON Daemon" Server (port "LOND" 5663)
5583:
5584: =head1 SYNOPSIS
5585:
1.74 harris41 5586: Usage: B<lond>
5587:
5588: Should only be run as user=www. This is a command-line script which
5589: is invoked by B<loncron>. There is no expectation that a typical user
5590: will manually start B<lond> from the command-line. (In other words,
5591: DO NOT START B<lond> YOURSELF.)
1.61 harris41 5592:
5593: =head1 DESCRIPTION
5594:
1.74 harris41 5595: There are two characteristics associated with the running of B<lond>,
5596: PROCESS MANAGEMENT (starting, stopping, handling child processes)
5597: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
5598: subscriptions, etc). These are described in two large
5599: sections below.
5600:
5601: B<PROCESS MANAGEMENT>
5602:
1.61 harris41 5603: Preforker - server who forks first. Runs as a daemon. HUPs.
5604: Uses IDEA encryption
5605:
1.74 harris41 5606: B<lond> forks off children processes that correspond to the other servers
5607: in the network. Management of these processes can be done at the
5608: parent process level or the child process level.
5609:
5610: B<logs/lond.log> is the location of log messages.
5611:
5612: The process management is now explained in terms of linux shell commands,
5613: subroutines internal to this code, and signal assignments:
5614:
5615: =over 4
5616:
5617: =item *
5618:
5619: PID is stored in B<logs/lond.pid>
5620:
5621: This is the process id number of the parent B<lond> process.
5622:
5623: =item *
5624:
5625: SIGTERM and SIGINT
5626:
5627: Parent signal assignment:
5628: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
5629:
5630: Child signal assignment:
5631: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
5632: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
5633: to restart a new child.)
5634:
5635: Command-line invocations:
5636: B<kill> B<-s> SIGTERM I<PID>
5637: B<kill> B<-s> SIGINT I<PID>
5638:
5639: Subroutine B<HUNTSMAN>:
5640: This is only invoked for the B<lond> parent I<PID>.
5641: This kills all the children, and then the parent.
5642: The B<lonc.pid> file is cleared.
5643:
5644: =item *
5645:
5646: SIGHUP
5647:
5648: Current bug:
5649: This signal can only be processed the first time
5650: on the parent process. Subsequent SIGHUP signals
5651: have no effect.
5652:
5653: Parent signal assignment:
5654: $SIG{HUP} = \&HUPSMAN;
5655:
5656: Child signal assignment:
5657: none (nothing happens)
5658:
5659: Command-line invocations:
5660: B<kill> B<-s> SIGHUP I<PID>
5661:
5662: Subroutine B<HUPSMAN>:
5663: This is only invoked for the B<lond> parent I<PID>,
5664: This kills all the children, and then the parent.
5665: The B<lond.pid> file is cleared.
5666:
5667: =item *
5668:
5669: SIGUSR1
5670:
5671: Parent signal assignment:
5672: $SIG{USR1} = \&USRMAN;
5673:
5674: Child signal assignment:
5675: $SIG{USR1}= \&logstatus;
5676:
5677: Command-line invocations:
5678: B<kill> B<-s> SIGUSR1 I<PID>
5679:
5680: Subroutine B<USRMAN>:
5681: When invoked for the B<lond> parent I<PID>,
5682: SIGUSR1 is sent to all the children, and the status of
5683: each connection is logged.
1.144 foxr 5684:
5685: =item *
5686:
5687: SIGUSR2
5688:
5689: Parent Signal assignment:
5690: $SIG{USR2} = \&UpdateHosts
5691:
5692: Child signal assignment:
5693: NONE
5694:
1.74 harris41 5695:
5696: =item *
5697:
5698: SIGCHLD
5699:
5700: Parent signal assignment:
5701: $SIG{CHLD} = \&REAPER;
5702:
5703: Child signal assignment:
5704: none
5705:
5706: Command-line invocations:
5707: B<kill> B<-s> SIGCHLD I<PID>
5708:
5709: Subroutine B<REAPER>:
5710: This is only invoked for the B<lond> parent I<PID>.
5711: Information pertaining to the child is removed.
5712: The socket port is cleaned up.
5713:
5714: =back
5715:
5716: B<SERVER-SIDE ACTIVITIES>
5717:
5718: Server-side information can be accepted in an encrypted or non-encrypted
5719: method.
5720:
5721: =over 4
5722:
5723: =item ping
5724:
5725: Query a client in the hosts.tab table; "Are you there?"
5726:
5727: =item pong
5728:
5729: Respond to a ping query.
5730:
5731: =item ekey
5732:
5733: Read in encrypted key, make cipher. Respond with a buildkey.
5734:
5735: =item load
5736:
5737: Respond with CPU load based on a computation upon /proc/loadavg.
5738:
5739: =item currentauth
5740:
5741: Reply with current authentication information (only over an
5742: encrypted channel).
5743:
5744: =item auth
5745:
5746: Only over an encrypted channel, reply as to whether a user's
5747: authentication information can be validated.
5748:
5749: =item passwd
5750:
5751: Allow for a password to be set.
5752:
5753: =item makeuser
5754:
5755: Make a user.
5756:
5757: =item passwd
5758:
5759: Allow for authentication mechanism and password to be changed.
5760:
5761: =item home
1.61 harris41 5762:
1.74 harris41 5763: Respond to a question "are you the home for a given user?"
5764:
5765: =item update
5766:
5767: Update contents of a subscribed resource.
5768:
5769: =item unsubscribe
5770:
5771: The server is unsubscribing from a resource.
5772:
5773: =item subscribe
5774:
5775: The server is subscribing to a resource.
5776:
5777: =item log
5778:
5779: Place in B<logs/lond.log>
5780:
5781: =item put
5782:
5783: stores hash in namespace
5784:
1.230 foxr 5785: =item rolesputy
1.74 harris41 5786:
5787: put a role into a user's environment
5788:
5789: =item get
5790:
5791: returns hash with keys from array
5792: reference filled in from namespace
5793:
5794: =item eget
5795:
5796: returns hash with keys from array
5797: reference filled in from namesp (encrypts the return communication)
5798:
5799: =item rolesget
5800:
5801: get a role from a user's environment
5802:
5803: =item del
5804:
5805: deletes keys out of array from namespace
5806:
5807: =item keys
5808:
5809: returns namespace keys
5810:
5811: =item dump
5812:
5813: dumps the complete (or key matching regexp) namespace into a hash
5814:
5815: =item store
5816:
5817: stores hash permanently
5818: for this url; hashref needs to be given and should be a \%hashname; the
5819: remaining args aren't required and if they aren't passed or are '' they will
5820: be derived from the ENV
5821:
5822: =item restore
5823:
5824: returns a hash for a given url
5825:
5826: =item querysend
5827:
5828: Tells client about the lonsql process that has been launched in response
5829: to a sent query.
5830:
5831: =item queryreply
5832:
5833: Accept information from lonsql and make appropriate storage in temporary
5834: file space.
5835:
5836: =item idput
5837:
5838: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
5839: for each student, defined perhaps by the institutional Registrar.)
5840:
5841: =item idget
5842:
5843: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
5844: for each student, defined perhaps by the institutional Registrar.)
5845:
5846: =item tmpput
5847:
5848: Accept and store information in temporary space.
5849:
5850: =item tmpget
5851:
5852: Send along temporarily stored information.
5853:
5854: =item ls
5855:
5856: List part of a user's directory.
5857:
1.135 foxr 5858: =item pushtable
5859:
5860: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
5861: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
5862: must be restored manually in case of a problem with the new table file.
5863: pushtable requires that the request be encrypted and validated via
5864: ValidateManager. The form of the command is:
5865: enc:pushtable tablename <tablecontents> \n
5866: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
5867: cleartext newline.
5868:
1.74 harris41 5869: =item Hanging up (exit or init)
5870:
5871: What to do when a client tells the server that they (the client)
5872: are leaving the network.
5873:
5874: =item unknown command
5875:
5876: If B<lond> is sent an unknown command (not in the list above),
5877: it replys to the client "unknown_cmd".
1.135 foxr 5878:
1.74 harris41 5879:
5880: =item UNKNOWN CLIENT
5881:
5882: If the anti-spoofing algorithm cannot verify the client,
5883: the client is rejected (with a "refused" message sent
5884: to the client, and the connection is closed.
5885:
5886: =back
1.61 harris41 5887:
5888: =head1 PREREQUISITES
5889:
5890: IO::Socket
5891: IO::File
5892: Apache::File
5893: Symbol
5894: POSIX
5895: Crypt::IDEA
5896: LWP::UserAgent()
5897: GDBM_File
5898: Authen::Krb4
1.91 albertel 5899: Authen::Krb5
1.61 harris41 5900:
5901: =head1 COREQUISITES
5902:
5903: =head1 OSNAMES
5904:
5905: linux
5906:
5907: =head1 SCRIPT CATEGORIES
5908:
5909: Server/Process
5910:
5911: =cut
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