Annotation of loncom/lond, revision 1.276
1.1 albertel 1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
1.60 www 4: #
1.276 ! foxr 5: # $Id: lond,v 1.275 2005/01/17 22:13:36 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;
1.265 albertel 49: use localstudentphoto;
1.143 foxr 50: use File::Copy;
1.169 foxr 51: use LONCAPA::ConfigFileEdit;
1.200 matthew 52: use LONCAPA::lonlocal;
53: use LONCAPA::lonssl;
1.221 albertel 54: use Fcntl qw(:flock);
1.1 albertel 55:
1.239 foxr 56: my $DEBUG = 0; # Non zero to enable debug log entries.
1.77 foxr 57:
1.57 www 58: my $status='';
59: my $lastlog='';
60:
1.276 ! foxr 61: my $VERSION='$Revision: 1.275 $'; #' stupid emacs
1.121 albertel 62: my $remoteVERSION;
1.214 foxr 63: my $currenthostid="default";
1.115 albertel 64: my $currentdomainid;
1.134 albertel 65:
66: my $client;
1.200 matthew 67: my $clientip; # IP address of client.
68: my $clientdns; # DNS name of client.
69: my $clientname; # LonCAPA name of client.
1.140 foxr 70:
1.134 albertel 71: my $server;
1.200 matthew 72: my $thisserver; # DNS of us.
73:
74: my $keymode;
1.198 foxr 75:
1.207 foxr 76: my $cipher; # Cipher key negotiated with client
77: my $tmpsnum = 0; # Id of tmpputs.
78:
1.178 foxr 79: #
80: # Connection type is:
81: # client - All client actions are allowed
82: # manager - only management functions allowed.
83: # both - Both management and client actions are allowed
84: #
1.161 foxr 85:
1.178 foxr 86: my $ConnectionType;
1.161 foxr 87:
1.200 matthew 88: my %hostid; # ID's for hosts in cluster by ip.
89: my %hostdom; # LonCAPA domain for hosts in cluster.
90: my %hostip; # IPs for hosts in cluster.
91: my %hostdns; # ID's of hosts looked up by DNS name.
1.161 foxr 92:
1.178 foxr 93: my %managers; # Ip -> manager names
1.161 foxr 94:
1.178 foxr 95: my %perlvar; # Will have the apache conf defined perl vars.
1.134 albertel 96:
1.178 foxr 97: #
1.207 foxr 98: # The hash below is used for command dispatching, and is therefore keyed on the request keyword.
99: # Each element of the hash contains a reference to an array that contains:
100: # A reference to a sub that executes the request corresponding to the keyword.
101: # A flag that is true if the request must be encoded to be acceptable.
102: # A mask with bits as follows:
103: # CLIENT_OK - Set when the function is allowed by ordinary clients
104: # MANAGER_OK - Set when the function is allowed to manager clients.
105: #
106: my $CLIENT_OK = 1;
107: my $MANAGER_OK = 2;
108: my %Dispatcher;
109:
110:
111: #
1.178 foxr 112: # The array below are password error strings."
113: #
114: my $lastpwderror = 13; # Largest error number from lcpasswd.
115: my @passwderrors = ("ok",
116: "lcpasswd must be run as user 'www'",
117: "lcpasswd got incorrect number of arguments",
118: "lcpasswd did not get the right nubmer of input text lines",
119: "lcpasswd too many simultaneous pwd changes in progress",
120: "lcpasswd User does not exist.",
121: "lcpasswd Incorrect current passwd",
122: "lcpasswd Unable to su to root.",
123: "lcpasswd Cannot set new passwd.",
124: "lcpasswd Username has invalid characters",
125: "lcpasswd Invalid characters in password",
1.223 foxr 126: "lcpasswd User already exists",
127: "lcpasswd Something went wrong with user addition.",
128: "lcpasswd Password mismatch",
129: "lcpasswd Error filename is invalid");
1.97 foxr 130:
131:
1.178 foxr 132: # The array below are lcuseradd error strings.:
1.97 foxr 133:
1.178 foxr 134: my $lastadderror = 13;
135: my @adderrors = ("ok",
136: "User ID mismatch, lcuseradd must run as user www",
137: "lcuseradd Incorrect number of command line parameters must be 3",
138: "lcuseradd Incorrect number of stdinput lines, must be 3",
139: "lcuseradd Too many other simultaneous pwd changes in progress",
140: "lcuseradd User does not exist",
141: "lcuseradd Unable to make www member of users's group",
142: "lcuseradd Unable to su to root",
143: "lcuseradd Unable to set password",
144: "lcuseradd Usrname has invalid characters",
145: "lcuseradd Password has an invalid character",
146: "lcuseradd User already exists",
147: "lcuseradd Could not add user.",
148: "lcuseradd Password mismatch");
1.97 foxr 149:
1.96 foxr 150:
1.207 foxr 151:
152: #
153: # Statistics that are maintained and dislayed in the status line.
154: #
1.212 foxr 155: my $Transactions = 0; # Number of attempted transactions.
156: my $Failures = 0; # Number of transcations failed.
1.207 foxr 157:
158: # ResetStatistics:
159: # Resets the statistics counters:
160: #
161: sub ResetStatistics {
162: $Transactions = 0;
163: $Failures = 0;
164: }
165:
1.200 matthew 166: #------------------------------------------------------------------------
167: #
168: # LocalConnection
169: # Completes the formation of a locally authenticated connection.
170: # This function will ensure that the 'remote' client is really the
171: # local host. If not, the connection is closed, and the function fails.
172: # If so, initcmd is parsed for the name of a file containing the
173: # IDEA session key. The fie is opened, read, deleted and the session
174: # key returned to the caller.
175: #
176: # Parameters:
177: # $Socket - Socket open on client.
178: # $initcmd - The full text of the init command.
179: #
180: # Implicit inputs:
181: # $clientdns - The DNS name of the remote client.
182: # $thisserver - Our DNS name.
183: #
184: # Returns:
185: # IDEA session key on success.
186: # undef on failure.
187: #
188: sub LocalConnection {
189: my ($Socket, $initcmd) = @_;
190: Debug("Attempting local connection: $initcmd client: $clientdns me: $thisserver");
191: if($clientdns ne $thisserver) {
192: &logthis('<font color="red"> LocalConnection rejecting non local: '
193: ."$clientdns ne $thisserver </font>");
194: close $Socket;
195: return undef;
1.224 foxr 196: } else {
1.200 matthew 197: chomp($initcmd); # Get rid of \n in filename.
198: my ($init, $type, $name) = split(/:/, $initcmd);
199: Debug(" Init command: $init $type $name ");
200:
201: # Require that $init = init, and $type = local: Otherwise
202: # the caller is insane:
203:
204: if(($init ne "init") && ($type ne "local")) {
205: &logthis('<font color = "red"> LocalConnection: caller is insane! '
206: ."init = $init, and type = $type </font>");
207: close($Socket);;
208: return undef;
209:
210: }
211: # Now get the key filename:
212:
213: my $IDEAKey = lonlocal::ReadKeyFile($name);
214: return $IDEAKey;
215: }
216: }
217: #------------------------------------------------------------------------------
218: #
219: # SSLConnection
220: # Completes the formation of an ssh authenticated connection. The
221: # socket is promoted to an ssl socket. If this promotion and the associated
222: # certificate exchange are successful, the IDEA key is generated and sent
223: # to the remote peer via the SSL tunnel. The IDEA key is also returned to
224: # the caller after the SSL tunnel is torn down.
225: #
226: # Parameters:
227: # Name Type Purpose
228: # $Socket IO::Socket::INET Plaintext socket.
229: #
230: # Returns:
231: # IDEA key on success.
232: # undef on failure.
233: #
234: sub SSLConnection {
235: my $Socket = shift;
236:
237: Debug("SSLConnection: ");
238: my $KeyFile = lonssl::KeyFile();
239: if(!$KeyFile) {
240: my $err = lonssl::LastError();
241: &logthis("<font color=\"red\"> CRITICAL"
242: ."Can't get key file $err </font>");
243: return undef;
244: }
245: my ($CACertificate,
246: $Certificate) = lonssl::CertificateFile();
247:
248:
249: # If any of the key, certificate or certificate authority
250: # certificate filenames are not defined, this can't work.
251:
252: if((!$Certificate) || (!$CACertificate)) {
253: my $err = lonssl::LastError();
254: &logthis("<font color=\"red\"> CRITICAL"
255: ."Can't get certificates: $err </font>");
256:
257: return undef;
258: }
259: Debug("Key: $KeyFile CA: $CACertificate Cert: $Certificate");
260:
261: # Indicate to our peer that we can procede with
262: # a transition to ssl authentication:
263:
264: print $Socket "ok:ssl\n";
265:
266: Debug("Approving promotion -> ssl");
267: # And do so:
268:
269: my $SSLSocket = lonssl::PromoteServerSocket($Socket,
270: $CACertificate,
271: $Certificate,
272: $KeyFile);
273: if(! ($SSLSocket) ) { # SSL socket promotion failed.
274: my $err = lonssl::LastError();
275: &logthis("<font color=\"red\"> CRITICAL "
276: ."SSL Socket promotion failed: $err </font>");
277: return undef;
278: }
279: Debug("SSL Promotion successful");
280:
281: #
282: # The only thing we'll use the socket for is to send the IDEA key
283: # to the peer:
284:
285: my $Key = lonlocal::CreateCipherKey();
286: print $SSLSocket "$Key\n";
287:
288: lonssl::Close($SSLSocket);
289:
290: Debug("Key exchange complete: $Key");
291:
292: return $Key;
293: }
294: #
295: # InsecureConnection:
296: # If insecure connections are allowd,
297: # exchange a challenge with the client to 'validate' the
298: # client (not really, but that's the protocol):
299: # We produce a challenge string that's sent to the client.
300: # The client must then echo the challenge verbatim to us.
301: #
302: # Parameter:
303: # Socket - Socket open on the client.
304: # Returns:
305: # 1 - success.
306: # 0 - failure (e.g.mismatch or insecure not allowed).
307: #
308: sub InsecureConnection {
309: my $Socket = shift;
310:
311: # Don't even start if insecure connections are not allowed.
312:
313: if(! $perlvar{londAllowInsecure}) { # Insecure connections not allowed.
314: return 0;
315: }
316:
317: # Fabricate a challenge string and send it..
318:
319: my $challenge = "$$".time; # pid + time.
320: print $Socket "$challenge\n";
321: &status("Waiting for challenge reply");
322:
323: my $answer = <$Socket>;
324: $answer =~s/\W//g;
325: if($challenge eq $answer) {
326: return 1;
1.224 foxr 327: } else {
1.200 matthew 328: logthis("<font color='blue'>WARNING client did not respond to challenge</font>");
329: &status("No challenge reqply");
330: return 0;
331: }
332:
333:
334: }
1.251 foxr 335: #
336: # Safely execute a command (as long as it's not a shel command and doesn
337: # not require/rely on shell escapes. The function operates by doing a
338: # a pipe based fork and capturing stdout and stderr from the pipe.
339: #
340: # Formal Parameters:
341: # $line - A line of text to be executed as a command.
342: # Returns:
343: # The output from that command. If the output is multiline the caller
344: # must know how to split up the output.
345: #
346: #
347: sub execute_command {
348: my ($line) = @_;
349: my @words = split(/\s/, $line); # Bust the command up into words.
350: my $output = "";
351:
352: my $pid = open(CHILD, "-|");
353:
354: if($pid) { # Parent process
355: Debug("In parent process for execute_command");
356: my @data = <CHILD>; # Read the child's outupt...
357: close CHILD;
358: foreach my $output_line (@data) {
359: Debug("Adding $output_line");
360: $output .= $output_line; # Presumably has a \n on it.
361: }
362:
363: } else { # Child process
364: close (STDERR);
365: open (STDERR, ">&STDOUT");# Combine stderr, and stdout...
366: exec(@words); # won't return.
367: }
368: return $output;
369: }
370:
1.200 matthew 371:
1.140 foxr 372: # GetCertificate: Given a transaction that requires a certificate,
373: # this function will extract the certificate from the transaction
374: # request. Note that at this point, the only concept of a certificate
375: # is the hostname to which we are connected.
376: #
377: # Parameter:
378: # request - The request sent by our client (this parameterization may
379: # need to change when we really use a certificate granting
380: # authority.
381: #
382: sub GetCertificate {
383: my $request = shift;
384:
385: return $clientip;
386: }
1.161 foxr 387:
1.178 foxr 388: #
389: # Return true if client is a manager.
390: #
391: sub isManager {
392: return (($ConnectionType eq "manager") || ($ConnectionType eq "both"));
393: }
394: #
395: # Return tru if client can do client functions
396: #
397: sub isClient {
398: return (($ConnectionType eq "client") || ($ConnectionType eq "both"));
399: }
1.161 foxr 400:
401:
1.156 foxr 402: #
403: # ReadManagerTable: Reads in the current manager table. For now this is
404: # done on each manager authentication because:
405: # - These authentications are not frequent
406: # - This allows dynamic changes to the manager table
407: # without the need to signal to the lond.
408: #
409: sub ReadManagerTable {
410:
411: # Clean out the old table first..
412:
1.166 foxr 413: foreach my $key (keys %managers) {
414: delete $managers{$key};
415: }
416:
417: my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
418: if (!open (MANAGERS, $tablename)) {
419: logthis('<font color="red">No manager table. Nobody can manage!!</font>');
420: return;
421: }
422: while(my $host = <MANAGERS>) {
423: chomp($host);
424: if ($host =~ "^#") { # Comment line.
425: next;
426: }
427: if (!defined $hostip{$host}) { # This is a non cluster member
1.161 foxr 428: # The entry is of the form:
429: # cluname:hostname
430: # cluname - A 'cluster hostname' is needed in order to negotiate
431: # the host key.
432: # hostname- The dns name of the host.
433: #
1.166 foxr 434: my($cluname, $dnsname) = split(/:/, $host);
435:
436: my $ip = gethostbyname($dnsname);
437: if(defined($ip)) { # bad names don't deserve entry.
438: my $hostip = inet_ntoa($ip);
439: $managers{$hostip} = $cluname;
440: logthis('<font color="green"> registering manager '.
441: "$dnsname as $cluname with $hostip </font>\n");
442: }
443: } else {
444: logthis('<font color="green"> existing host'." $host</font>\n");
445: $managers{$hostip{$host}} = $host; # Use info from cluster tab if clumemeber
446: }
447: }
1.156 foxr 448: }
1.140 foxr 449:
450: #
451: # ValidManager: Determines if a given certificate represents a valid manager.
452: # in this primitive implementation, the 'certificate' is
453: # just the connecting loncapa client name. This is checked
454: # against a valid client list in the configuration.
455: #
456: #
457: sub ValidManager {
458: my $certificate = shift;
459:
1.163 foxr 460: return isManager;
1.140 foxr 461: }
462: #
1.143 foxr 463: # CopyFile: Called as part of the process of installing a
464: # new configuration file. This function copies an existing
465: # file to a backup file.
466: # Parameters:
467: # oldfile - Name of the file to backup.
468: # newfile - Name of the backup file.
469: # Return:
470: # 0 - Failure (errno has failure reason).
471: # 1 - Success.
472: #
473: sub CopyFile {
1.192 foxr 474:
475: my ($oldfile, $newfile) = @_;
1.143 foxr 476:
477: # The file must exist:
478:
479: if(-e $oldfile) {
480:
481: # Read the old file.
482:
483: my $oldfh = IO::File->new("< $oldfile");
484: if(!$oldfh) {
485: return 0;
486: }
487: my @contents = <$oldfh>; # Suck in the entire file.
488:
489: # write the backup file:
490:
491: my $newfh = IO::File->new("> $newfile");
492: if(!(defined $newfh)){
493: return 0;
494: }
495: my $lines = scalar @contents;
496: for (my $i =0; $i < $lines; $i++) {
497: print $newfh ($contents[$i]);
498: }
499:
500: $oldfh->close;
501: $newfh->close;
502:
503: chmod(0660, $newfile);
504:
505: return 1;
506:
507: } else {
508: return 0;
509: }
510: }
1.157 foxr 511: #
512: # Host files are passed out with externally visible host IPs.
513: # If, for example, we are behind a fire-wall or NAT host, our
514: # internally visible IP may be different than the externally
515: # visible IP. Therefore, we always adjust the contents of the
516: # host file so that the entry for ME is the IP that we believe
517: # we have. At present, this is defined as the entry that
518: # DNS has for us. If by some chance we are not able to get a
519: # DNS translation for us, then we assume that the host.tab file
520: # is correct.
521: # BUGBUGBUG - in the future, we really should see if we can
522: # easily query the interface(s) instead.
523: # Parameter(s):
524: # contents - The contents of the host.tab to check.
525: # Returns:
526: # newcontents - The adjusted contents.
527: #
528: #
529: sub AdjustHostContents {
530: my $contents = shift;
531: my $adjusted;
532: my $me = $perlvar{'lonHostID'};
533:
1.166 foxr 534: foreach my $line (split(/\n/,$contents)) {
1.157 foxr 535: if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/))) {
536: chomp($line);
537: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
538: if ($id eq $me) {
1.166 foxr 539: my $ip = gethostbyname($name);
540: my $ipnew = inet_ntoa($ip);
541: $ip = $ipnew;
1.157 foxr 542: # Reconstruct the host line and append to adjusted:
543:
1.166 foxr 544: my $newline = "$id:$domain:$role:$name:$ip";
545: if($maxcon ne "") { # Not all hosts have loncnew tuning params
546: $newline .= ":$maxcon:$idleto:$mincon";
547: }
548: $adjusted .= $newline."\n";
1.157 foxr 549:
1.166 foxr 550: } else { # Not me, pass unmodified.
551: $adjusted .= $line."\n";
552: }
1.157 foxr 553: } else { # Blank or comment never re-written.
554: $adjusted .= $line."\n"; # Pass blanks and comments as is.
555: }
1.166 foxr 556: }
557: return $adjusted;
1.157 foxr 558: }
1.143 foxr 559: #
560: # InstallFile: Called to install an administrative file:
561: # - The file is created with <name>.tmp
562: # - The <name>.tmp file is then mv'd to <name>
563: # This lugubrious procedure is done to ensure that we are never without
564: # a valid, even if dated, version of the file regardless of who crashes
565: # and when the crash occurs.
566: #
567: # Parameters:
568: # Name of the file
569: # File Contents.
570: # Return:
571: # nonzero - success.
572: # 0 - failure and $! has an errno.
573: #
574: sub InstallFile {
1.192 foxr 575:
576: my ($Filename, $Contents) = @_;
1.143 foxr 577: my $TempFile = $Filename.".tmp";
578:
579: # Open the file for write:
580:
581: my $fh = IO::File->new("> $TempFile"); # Write to temp.
582: if(!(defined $fh)) {
583: &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
584: return 0;
585: }
586: # write the contents of the file:
587:
588: print $fh ($Contents);
589: $fh->close; # In case we ever have a filesystem w. locking
590:
591: chmod(0660, $TempFile);
592:
593: # Now we can move install the file in position.
594:
595: move($TempFile, $Filename);
596:
597: return 1;
598: }
1.200 matthew 599:
600:
1.169 foxr 601: #
602: # ConfigFileFromSelector: converts a configuration file selector
603: # (one of host or domain at this point) into a
604: # configuration file pathname.
605: #
606: # Parameters:
607: # selector - Configuration file selector.
608: # Returns:
609: # Full path to the file or undef if the selector is invalid.
610: #
611: sub ConfigFileFromSelector {
612: my $selector = shift;
613: my $tablefile;
614:
615: my $tabledir = $perlvar{'lonTabDir'}.'/';
616: if ($selector eq "hosts") {
617: $tablefile = $tabledir."hosts.tab";
618: } elsif ($selector eq "domain") {
619: $tablefile = $tabledir."domain.tab";
620: } else {
621: return undef;
622: }
623: return $tablefile;
1.143 foxr 624:
1.169 foxr 625: }
1.143 foxr 626: #
1.141 foxr 627: # PushFile: Called to do an administrative push of a file.
628: # - Ensure the file being pushed is one we support.
629: # - Backup the old file to <filename.saved>
630: # - Separate the contents of the new file out from the
631: # rest of the request.
632: # - Write the new file.
633: # Parameter:
634: # Request - The entire user request. This consists of a : separated
635: # string pushfile:tablename:contents.
636: # NOTE: The contents may have :'s in it as well making things a bit
637: # more interesting... but not much.
638: # Returns:
639: # String to send to client ("ok" or "refused" if bad file).
640: #
641: sub PushFile {
642: my $request = shift;
643: my ($command, $filename, $contents) = split(":", $request, 3);
644:
645: # At this point in time, pushes for only the following tables are
646: # supported:
647: # hosts.tab ($filename eq host).
648: # domain.tab ($filename eq domain).
649: # Construct the destination filename or reject the request.
650: #
651: # lonManage is supposed to ensure this, however this session could be
652: # part of some elaborate spoof that managed somehow to authenticate.
653: #
654:
1.169 foxr 655:
656: my $tablefile = ConfigFileFromSelector($filename);
657: if(! (defined $tablefile)) {
1.141 foxr 658: return "refused";
659: }
660: #
661: # >copy< the old table to the backup table
662: # don't rename in case system crashes/reboots etc. in the time
663: # window between a rename and write.
664: #
665: my $backupfile = $tablefile;
666: $backupfile =~ s/\.tab$/.old/;
1.143 foxr 667: if(!CopyFile($tablefile, $backupfile)) {
668: &logthis('<font color="green"> CopyFile from '.$tablefile." to ".$backupfile." failed </font>");
669: return "error:$!";
670: }
1.141 foxr 671: &logthis('<font color="green"> Pushfile: backed up '
672: .$tablefile." to $backupfile</font>");
673:
1.157 foxr 674: # If the file being pushed is the host file, we adjust the entry for ourself so that the
675: # IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible
676: # to conceive of conditions where we don't have a DNS entry locally. This is possible in a
677: # network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
678: # that possibilty.
679:
680: if($filename eq "host") {
681: $contents = AdjustHostContents($contents);
682: }
683:
1.141 foxr 684: # Install the new file:
685:
1.143 foxr 686: if(!InstallFile($tablefile, $contents)) {
687: &logthis('<font color="red"> Pushfile: unable to install '
1.145 foxr 688: .$tablefile." $! </font>");
1.143 foxr 689: return "error:$!";
1.224 foxr 690: } else {
1.143 foxr 691: &logthis('<font color="green"> Installed new '.$tablefile
692: ."</font>");
693:
694: }
695:
1.141 foxr 696:
697: # Indicate success:
698:
699: return "ok";
700:
701: }
1.145 foxr 702:
703: #
704: # Called to re-init either lonc or lond.
705: #
706: # Parameters:
707: # request - The full request by the client. This is of the form
708: # reinit:<process>
709: # where <process> is allowed to be either of
710: # lonc or lond
711: #
712: # Returns:
713: # The string to be sent back to the client either:
714: # ok - Everything worked just fine.
715: # error:why - There was a failure and why describes the reason.
716: #
717: #
718: sub ReinitProcess {
719: my $request = shift;
720:
1.146 foxr 721:
722: # separate the request (reinit) from the process identifier and
723: # validate it producing the name of the .pid file for the process.
724: #
725: #
726: my ($junk, $process) = split(":", $request);
1.147 foxr 727: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
1.146 foxr 728: if($process eq 'lonc') {
729: $processpidfile = $processpidfile."lonc.pid";
1.147 foxr 730: if (!open(PIDFILE, "< $processpidfile")) {
731: return "error:Open failed for $processpidfile";
732: }
733: my $loncpid = <PIDFILE>;
734: close(PIDFILE);
735: logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
736: ."</font>");
737: kill("USR2", $loncpid);
1.146 foxr 738: } elsif ($process eq 'lond') {
1.147 foxr 739: logthis('<font color="red"> Reinitializing self (lond) </font>');
740: &UpdateHosts; # Lond is us!!
1.146 foxr 741: } else {
742: &logthis('<font color="yellow" Invalid reinit request for '.$process
743: ."</font>");
744: return "error:Invalid process identifier $process";
745: }
1.145 foxr 746: return 'ok';
747: }
1.168 foxr 748: # Validate a line in a configuration file edit script:
749: # Validation includes:
750: # - Ensuring the command is valid.
751: # - Ensuring the command has sufficient parameters
752: # Parameters:
753: # scriptline - A line to validate (\n has been stripped for what it's worth).
1.167 foxr 754: #
1.168 foxr 755: # Return:
756: # 0 - Invalid scriptline.
757: # 1 - Valid scriptline
758: # NOTE:
759: # Only the command syntax is checked, not the executability of the
760: # command.
761: #
762: sub isValidEditCommand {
763: my $scriptline = shift;
764:
765: # Line elements are pipe separated:
766:
767: my ($command, $key, $newline) = split(/\|/, $scriptline);
768: &logthis('<font color="green"> isValideditCommand checking: '.
769: "Command = '$command', Key = '$key', Newline = '$newline' </font>\n");
770:
771: if ($command eq "delete") {
772: #
773: # key with no newline.
774: #
775: if( ($key eq "") || ($newline ne "")) {
776: return 0; # Must have key but no newline.
777: } else {
778: return 1; # Valid syntax.
779: }
1.169 foxr 780: } elsif ($command eq "replace") {
1.168 foxr 781: #
782: # key and newline:
783: #
784: if (($key eq "") || ($newline eq "")) {
785: return 0;
786: } else {
787: return 1;
788: }
1.169 foxr 789: } elsif ($command eq "append") {
790: if (($key ne "") && ($newline eq "")) {
791: return 1;
792: } else {
793: return 0;
794: }
1.168 foxr 795: } else {
796: return 0; # Invalid command.
797: }
798: return 0; # Should not get here!!!
799: }
1.169 foxr 800: #
801: # ApplyEdit - Applies an edit command to a line in a configuration
802: # file. It is the caller's responsiblity to validate the
803: # edit line.
804: # Parameters:
805: # $directive - A single edit directive to apply.
806: # Edit directives are of the form:
807: # append|newline - Appends a new line to the file.
808: # replace|key|newline - Replaces the line with key value 'key'
809: # delete|key - Deletes the line with key value 'key'.
810: # $editor - A config file editor object that contains the
811: # file being edited.
812: #
813: sub ApplyEdit {
1.192 foxr 814:
815: my ($directive, $editor) = @_;
1.169 foxr 816:
817: # Break the directive down into its command and its parameters
818: # (at most two at this point. The meaning of the parameters, if in fact
819: # they exist depends on the command).
820:
821: my ($command, $p1, $p2) = split(/\|/, $directive);
822:
823: if($command eq "append") {
824: $editor->Append($p1); # p1 - key p2 null.
825: } elsif ($command eq "replace") {
826: $editor->ReplaceLine($p1, $p2); # p1 - key p2 = newline.
827: } elsif ($command eq "delete") {
828: $editor->DeleteLine($p1); # p1 - key p2 null.
829: } else { # Should not get here!!!
830: die "Invalid command given to ApplyEdit $command"
831: }
832: }
833: #
834: # AdjustOurHost:
835: # Adjusts a host file stored in a configuration file editor object
836: # for the true IP address of this host. This is necessary for hosts
837: # that live behind a firewall.
838: # Those hosts have a publicly distributed IP of the firewall, but
839: # internally must use their actual IP. We assume that a given
840: # host only has a single IP interface for now.
841: # Formal Parameters:
842: # editor - The configuration file editor to adjust. This
843: # editor is assumed to contain a hosts.tab file.
844: # Strategy:
845: # - Figure out our hostname.
846: # - Lookup the entry for this host.
847: # - Modify the line to contain our IP
848: # - Do a replace for this host.
849: sub AdjustOurHost {
850: my $editor = shift;
851:
852: # figure out who I am.
853:
854: my $myHostName = $perlvar{'lonHostID'}; # LonCAPA hostname.
855:
856: # Get my host file entry.
857:
858: my $ConfigLine = $editor->Find($myHostName);
859: if(! (defined $ConfigLine)) {
860: die "AdjustOurHost - no entry for me in hosts file $myHostName";
861: }
862: # figure out my IP:
863: # Use the config line to get my hostname.
864: # Use gethostbyname to translate that into an IP address.
865: #
866: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);
867: my $BinaryIp = gethostbyname($name);
868: my $ip = inet_ntoa($ip);
869: #
870: # Reassemble the config line from the elements in the list.
871: # Note that if the loncnew items were not present before, they will
872: # be now even if they would be empty
873: #
874: my $newConfigLine = $id;
875: foreach my $item ($domain, $role, $name, $ip, $maxcon, $idleto, $mincon) {
876: $newConfigLine .= ":".$item;
877: }
878: # Replace the line:
879:
880: $editor->ReplaceLine($id, $newConfigLine);
881:
882: }
883: #
884: # ReplaceConfigFile:
885: # Replaces a configuration file with the contents of a
886: # configuration file editor object.
887: # This is done by:
888: # - Copying the target file to <filename>.old
889: # - Writing the new file to <filename>.tmp
890: # - Moving <filename.tmp> -> <filename>
891: # This laborious process ensures that the system is never without
892: # a configuration file that's at least valid (even if the contents
893: # may be dated).
894: # Parameters:
895: # filename - Name of the file to modify... this is a full path.
896: # editor - Editor containing the file.
897: #
898: sub ReplaceConfigFile {
1.192 foxr 899:
900: my ($filename, $editor) = @_;
1.168 foxr 901:
1.169 foxr 902: CopyFile ($filename, $filename.".old");
903:
904: my $contents = $editor->Get(); # Get the contents of the file.
905:
906: InstallFile($filename, $contents);
907: }
1.168 foxr 908: #
909: #
910: # Called to edit a configuration table file
1.167 foxr 911: # Parameters:
912: # request - The entire command/request sent by lonc or lonManage
913: # Return:
914: # The reply to send to the client.
1.168 foxr 915: #
1.167 foxr 916: sub EditFile {
917: my $request = shift;
918:
919: # Split the command into it's pieces: edit:filetype:script
920:
1.168 foxr 921: my ($request, $filetype, $script) = split(/:/, $request,3); # : in script
1.167 foxr 922:
923: # Check the pre-coditions for success:
924:
925: if($request != "edit") { # Something is amiss afoot alack.
926: return "error:edit request detected, but request != 'edit'\n";
927: }
928: if( ($filetype ne "hosts") &&
929: ($filetype ne "domain")) {
930: return "error:edit requested with invalid file specifier: $filetype \n";
931: }
932:
933: # Split the edit script and check it's validity.
1.168 foxr 934:
935: my @scriptlines = split(/\n/, $script); # one line per element.
936: my $linecount = scalar(@scriptlines);
937: for(my $i = 0; $i < $linecount; $i++) {
938: chomp($scriptlines[$i]);
939: if(!isValidEditCommand($scriptlines[$i])) {
940: return "error:edit with bad script line: '$scriptlines[$i]' \n";
941: }
942: }
1.145 foxr 943:
1.167 foxr 944: # Execute the edit operation.
1.169 foxr 945: # - Create a config file editor for the appropriate file and
946: # - execute each command in the script:
947: #
948: my $configfile = ConfigFileFromSelector($filetype);
949: if (!(defined $configfile)) {
950: return "refused\n";
951: }
952: my $editor = ConfigFileEdit->new($configfile);
1.167 foxr 953:
1.169 foxr 954: for (my $i = 0; $i < $linecount; $i++) {
955: ApplyEdit($scriptlines[$i], $editor);
956: }
957: # If the file is the host file, ensure that our host is
958: # adjusted to have our ip:
959: #
960: if($filetype eq "host") {
961: AdjustOurHost($editor);
962: }
963: # Finally replace the current file with our file.
964: #
965: ReplaceConfigFile($configfile, $editor);
1.167 foxr 966:
967: return "ok\n";
968: }
1.207 foxr 969:
970: #---------------------------------------------------------------
971: #
972: # Manipulation of hash based databases (factoring out common code
973: # for later use as we refactor.
974: #
975: # Ties a domain level resource file to a hash.
976: # If requested a history entry is created in the associated hist file.
977: #
978: # Parameters:
979: # domain - Name of the domain in which the resource file lives.
980: # namespace - Name of the hash within that domain.
981: # how - How to tie the hash (e.g. GDBM_WRCREAT()).
982: # loghead - Optional parameter, if present a log entry is created
983: # in the associated history file and this is the first part
984: # of that entry.
985: # logtail - Goes along with loghead, The actual logentry is of the
986: # form $loghead:<timestamp>:logtail.
987: # Returns:
988: # Reference to a hash bound to the db file or alternatively undef
989: # if the tie failed.
990: #
1.209 albertel 991: sub tie_domain_hash {
1.210 albertel 992: my ($domain,$namespace,$how,$loghead,$logtail) = @_;
1.207 foxr 993:
994: # Filter out any whitespace in the domain name:
995:
996: $domain =~ s/\W//g;
997:
998: # We have enough to go on to tie the hash:
999:
1000: my $user_top_dir = $perlvar{'lonUsersDir'};
1001: my $domain_dir = $user_top_dir."/$domain";
1002: my $resource_file = $domain_dir."/$namespace.db";
1003: my %hash;
1004: if(tie(%hash, 'GDBM_File', $resource_file, $how, 0640)) {
1.211 albertel 1005: if (defined($loghead)) { # Need to log the operation.
1.210 albertel 1006: my $logFh = IO::File->new(">>$domain_dir/$namespace.hist");
1.207 foxr 1007: if($logFh) {
1008: my $timestamp = time;
1009: print $logFh "$loghead:$timestamp:$logtail\n";
1010: }
1.210 albertel 1011: $logFh->close;
1.207 foxr 1012: }
1013: return \%hash; # Return the tied hash.
1.210 albertel 1014: } else {
1.207 foxr 1015: return undef; # Tie failed.
1016: }
1017: }
1018:
1019: #
1020: # Ties a user's resource file to a hash.
1021: # If necessary, an appropriate history
1022: # log file entry is made as well.
1023: # This sub factors out common code from the subs that manipulate
1024: # the various gdbm files that keep keyword value pairs.
1025: # Parameters:
1026: # domain - Name of the domain the user is in.
1027: # user - Name of the 'current user'.
1028: # namespace - Namespace representing the file to tie.
1029: # how - What the tie is done to (e.g. GDBM_WRCREAT().
1030: # loghead - Optional first part of log entry if there may be a
1031: # history file.
1032: # what - Optional tail of log entry if there may be a history
1033: # file.
1034: # Returns:
1035: # hash to which the database is tied. It's up to the caller to untie.
1036: # undef if the has could not be tied.
1037: #
1.210 albertel 1038: sub tie_user_hash {
1039: my ($domain,$user,$namespace,$how,$loghead,$what) = @_;
1.207 foxr 1040:
1041: $namespace=~s/\//\_/g; # / -> _
1042: $namespace=~s/\W//g; # whitespace eliminated.
1043: my $proname = propath($domain, $user);
1044:
1045: # Tie the database.
1046:
1047: my %hash;
1048: if(tie(%hash, 'GDBM_File', "$proname/$namespace.db",
1049: $how, 0640)) {
1.209 albertel 1050: # If this is a namespace for which a history is kept,
1051: # make the history log entry:
1.252 albertel 1052: if (($namespace !~/^nohist\_/) && (defined($loghead))) {
1.209 albertel 1053: my $args = scalar @_;
1054: Debug(" Opening history: $namespace $args");
1055: my $hfh = IO::File->new(">>$proname/$namespace.hist");
1056: if($hfh) {
1057: my $now = time;
1058: print $hfh "$loghead:$now:$what\n";
1059: }
1.210 albertel 1060: $hfh->close;
1.209 albertel 1061: }
1.207 foxr 1062: return \%hash;
1.209 albertel 1063: } else {
1.207 foxr 1064: return undef;
1065: }
1066:
1067: }
1.214 foxr 1068:
1.255 foxr 1069: # read_profile
1070: #
1071: # Returns a set of specific entries from a user's profile file.
1072: # this is a utility function that is used by both get_profile_entry and
1073: # get_profile_entry_encrypted.
1074: #
1075: # Parameters:
1076: # udom - Domain in which the user exists.
1077: # uname - User's account name (loncapa account)
1078: # namespace - The profile namespace to open.
1079: # what - A set of & separated queries.
1080: # Returns:
1081: # If all ok: - The string that needs to be shipped back to the user.
1082: # If failure - A string that starts with error: followed by the failure
1083: # reason.. note that this probabyl gets shipped back to the
1084: # user as well.
1085: #
1086: sub read_profile {
1087: my ($udom, $uname, $namespace, $what) = @_;
1088:
1089: my $hashref = &tie_user_hash($udom, $uname, $namespace,
1090: &GDBM_READER());
1091: if ($hashref) {
1092: my @queries=split(/\&/,$what);
1093: my $qresult='';
1094:
1095: for (my $i=0;$i<=$#queries;$i++) {
1096: $qresult.="$hashref->{$queries[$i]}&"; # Presumably failure gives empty string.
1097: }
1098: $qresult=~s/\&$//; # Remove trailing & from last lookup.
1099: if (untie %$hashref) {
1100: return $qresult;
1101: } else {
1102: return "error: ".($!+0)." untie (GDBM) Failed";
1103: }
1104: } else {
1105: if ($!+0 == 2) {
1106: return "error:No such file or GDBM reported bad block error";
1107: } else {
1108: return "error: ".($!+0)." tie (GDBM) Failed";
1109: }
1110: }
1111:
1112: }
1.214 foxr 1113: #--------------------- Request Handlers --------------------------------------------
1114: #
1.215 foxr 1115: # By convention each request handler registers itself prior to the sub
1116: # declaration:
1.214 foxr 1117: #
1118:
1.216 foxr 1119: #++
1120: #
1.214 foxr 1121: # Handles ping requests.
1122: # Parameters:
1123: # $cmd - the actual keyword that invoked us.
1124: # $tail - the tail of the request that invoked us.
1125: # $replyfd- File descriptor connected to the client
1126: # Implicit Inputs:
1127: # $currenthostid - Global variable that carries the name of the host we are
1128: # known as.
1129: # Returns:
1130: # 1 - Ok to continue processing.
1131: # 0 - Program should exit.
1132: # Side effects:
1133: # Reply information is sent to the client.
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: sub pong_handler {
1162: my ($cmd, $tail, $replyfd) = @_;
1163:
1164: my $reply=&reply("ping",$clientname);
1165: &Reply( $replyfd, "$currenthostid:$reply\n", "$cmd:$tail");
1166: return 1;
1167: }
1168: ®ister_handler("pong", \&pong_handler, 0, 1, 1); # Pong unencoded, client or manager
1169:
1.216 foxr 1170: #++
1171: # Called to establish an encrypted session key with the remote client.
1172: # Note that with secure lond, in most cases this function is never
1173: # invoked. Instead, the secure session key is established either
1174: # via a local file that's locked down tight and only lives for a short
1175: # time, or via an ssl tunnel...and is generated from a bunch-o-random
1176: # bits from /dev/urandom, rather than the predictable pattern used by
1177: # by this sub. This sub is only used in the old-style insecure
1178: # key negotiation.
1179: # Parameters:
1180: # $cmd - the actual keyword that invoked us.
1181: # $tail - the tail of the request that invoked us.
1182: # $replyfd- File descriptor connected to the client
1183: # Implicit Inputs:
1184: # $currenthostid - Global variable that carries the name of the host
1185: # known as.
1186: # $clientname - Global variable that carries the name of the hsot we're connected to.
1187: # Returns:
1188: # 1 - Ok to continue processing.
1189: # 0 - Program should exit.
1190: # Implicit Outputs:
1191: # Reply information is sent to the client.
1192: # $cipher is set with a reference to a new IDEA encryption object.
1193: #
1194: sub establish_key_handler {
1195: my ($cmd, $tail, $replyfd) = @_;
1196:
1197: my $buildkey=time.$$.int(rand 100000);
1198: $buildkey=~tr/1-6/A-F/;
1199: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
1200: my $key=$currenthostid.$clientname;
1201: $key=~tr/a-z/A-Z/;
1202: $key=~tr/G-P/0-9/;
1203: $key=~tr/Q-Z/0-9/;
1204: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
1205: $key=substr($key,0,32);
1206: my $cipherkey=pack("H32",$key);
1207: $cipher=new IDEA $cipherkey;
1208: &Reply($replyfd, "$buildkey\n", "$cmd:$tail");
1209:
1210: return 1;
1211:
1212: }
1213: ®ister_handler("ekey", \&establish_key_handler, 0, 1,1);
1214:
1.217 foxr 1215: # Handler for the load command. Returns the current system load average
1216: # to the requestor.
1217: #
1218: # Parameters:
1219: # $cmd - the actual keyword that invoked us.
1220: # $tail - the tail of the request that invoked us.
1221: # $replyfd- File descriptor connected to the client
1222: # Implicit Inputs:
1223: # $currenthostid - Global variable that carries the name of the host
1224: # known as.
1225: # $clientname - Global variable that carries the name of the hsot we're connected to.
1226: # Returns:
1227: # 1 - Ok to continue processing.
1228: # 0 - Program should exit.
1229: # Side effects:
1230: # Reply information is sent to the client.
1231: sub load_handler {
1232: my ($cmd, $tail, $replyfd) = @_;
1233:
1234: # Get the load average from /proc/loadavg and calculate it as a percentage of
1235: # the allowed load limit as set by the perl global variable lonLoadLim
1236:
1237: my $loadavg;
1238: my $loadfile=IO::File->new('/proc/loadavg');
1239:
1240: $loadavg=<$loadfile>;
1241: $loadavg =~ s/\s.*//g; # Extract the first field only.
1242:
1243: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1244:
1245: &Reply( $replyfd, "$loadpercent\n", "$cmd:$tail");
1246:
1247: return 1;
1248: }
1.263 albertel 1249: ®ister_handler("load", \&load_handler, 0, 1, 0);
1.217 foxr 1250:
1251: #
1252: # Process the userload request. This sub returns to the client the current
1253: # user load average. It can be invoked either by clients or managers.
1254: #
1255: # Parameters:
1256: # $cmd - the actual keyword that invoked us.
1257: # $tail - the tail of the request that invoked us.
1258: # $replyfd- File descriptor connected to the client
1259: # Implicit Inputs:
1260: # $currenthostid - Global variable that carries the name of the host
1261: # known as.
1262: # $clientname - Global variable that carries the name of the hsot we're connected to.
1263: # Returns:
1264: # 1 - Ok to continue processing.
1265: # 0 - Program should exit
1266: # Implicit inputs:
1267: # whatever the userload() function requires.
1268: # Implicit outputs:
1269: # the reply is written to the client.
1270: #
1271: sub user_load_handler {
1272: my ($cmd, $tail, $replyfd) = @_;
1273:
1274: my $userloadpercent=&userload();
1275: &Reply($replyfd, "$userloadpercent\n", "$cmd:$tail");
1276:
1277: return 1;
1278: }
1.263 albertel 1279: ®ister_handler("userload", \&user_load_handler, 0, 1, 0);
1.217 foxr 1280:
1.218 foxr 1281: # Process a request for the authorization type of a user:
1282: # (userauth).
1283: #
1284: # Parameters:
1285: # $cmd - the actual keyword that invoked us.
1286: # $tail - the tail of the request that invoked us.
1287: # $replyfd- File descriptor connected to the client
1288: # Returns:
1289: # 1 - Ok to continue processing.
1290: # 0 - Program should exit
1291: # Implicit outputs:
1292: # The user authorization type is written to the client.
1293: #
1294: sub user_authorization_type {
1295: my ($cmd, $tail, $replyfd) = @_;
1296:
1297: my $userinput = "$cmd:$tail";
1298:
1299: # Pull the domain and username out of the command tail.
1.222 foxr 1300: # and call get_auth_type to determine the authentication type.
1.218 foxr 1301:
1302: my ($udom,$uname)=split(/:/,$tail);
1.222 foxr 1303: my $result = &get_auth_type($udom, $uname);
1.218 foxr 1304: if($result eq "nouser") {
1305: &Failure( $replyfd, "unknown_user\n", $userinput);
1306: } else {
1307: #
1.222 foxr 1308: # We only want to pass the second field from get_auth_type
1.218 foxr 1309: # for ^krb.. otherwise we'll be handing out the encrypted
1310: # password for internals e.g.
1311: #
1312: my ($type,$otherinfo) = split(/:/,$result);
1313: if($type =~ /^krb/) {
1314: $type = $result;
1.269 raeburn 1315: } else {
1316: $type .= ':';
1317: }
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: # $client - File descriptor connected to the client
1333: # Returns:
1334: # 1 - Ok to continue processing.
1335: # 0 - Program should exit
1336: # Implicit Output:
1337: # a reply is written to the client.
1338: sub push_file_handler {
1339: my ($cmd, $tail, $client) = @_;
1340:
1341: my $userinput = "$cmd:$tail";
1342:
1343: # At this time we only know that the IP of our partner is a valid manager
1344: # the code below is a hook to do further authentication (e.g. to resolve
1345: # spoofing).
1346:
1347: my $cert = &GetCertificate($userinput);
1348: if(&ValidManager($cert)) {
1349:
1350: # Now presumably we have the bona fides of both the peer host and the
1351: # process making the request.
1352:
1353: my $reply = &PushFile($userinput);
1354: &Reply($client, "$reply\n", $userinput);
1355:
1356: } else {
1357: &Failure( $client, "refused\n", $userinput);
1358: }
1.219 foxr 1359: return 1;
1.218 foxr 1360: }
1361: ®ister_handler("pushfile", \&push_file_handler, 1, 0, 1);
1362:
1.243 banghart 1363: #
1364: # du - list the disk usuage of a directory recursively.
1365: #
1366: # note: stolen code from the ls file handler
1367: # under construction by Rick Banghart
1368: # .
1369: # Parameters:
1370: # $cmd - The command that dispatched us (du).
1371: # $ududir - The directory path to list... I'm not sure what this
1372: # is relative as things like ls:. return e.g.
1373: # no_such_dir.
1374: # $client - Socket open on the client.
1375: # Returns:
1376: # 1 - indicating that the daemon should not disconnect.
1377: # Side Effects:
1378: # The reply is written to $client.
1379: #
1380: sub du_handler {
1381: my ($cmd, $ududir, $client) = @_;
1.251 foxr 1382: my ($ududir) = split(/:/,$ududir); # Make 'telnet' testing easier.
1383: my $userinput = "$cmd:$ududir";
1384:
1.245 albertel 1385: if ($ududir=~/\.\./ || $ududir!~m|^/home/httpd/|) {
1386: &Failure($client,"refused\n","$cmd:$ududir");
1387: return 1;
1388: }
1.249 foxr 1389: # Since $ududir could have some nasties in it,
1390: # we will require that ududir is a valid
1391: # directory. Just in case someone tries to
1392: # slip us a line like .;(cd /home/httpd rm -rf*)
1393: # etc.
1394: #
1395: if (-d $ududir) {
1396: # And as Shakespeare would say to make
1.251 foxr 1397: # assurance double sure,
1398: # use execute_command to ensure that the command is not executed in
1399: # a shell that can screw us up.
1400:
1401: my $duout = execute_command("du -ks $ududir");
1.249 foxr 1402: $duout=~s/[^\d]//g; #preserve only the numbers
1403: &Reply($client,"$duout\n","$cmd:$ududir");
1404: } else {
1.251 foxr 1405:
1406: &Failure($client, "bad_directory:$ududir\n","$cmd:$ududir");
1407:
1.249 foxr 1408: }
1.243 banghart 1409: return 1;
1410: }
1411: ®ister_handler("du", \&du_handler, 0, 1, 0);
1.218 foxr 1412:
1.239 foxr 1413: #
1414: # ls - list the contents of a directory. For each file in the
1415: # selected directory the filename followed by the full output of
1416: # the stat function is returned. The returned info for each
1417: # file are separated by ':'. The stat fields are separated by &'s.
1418: # Parameters:
1419: # $cmd - The command that dispatched us (ls).
1420: # $ulsdir - The directory path to list... I'm not sure what this
1421: # is relative as things like ls:. return e.g.
1422: # no_such_dir.
1423: # $client - Socket open on the client.
1424: # Returns:
1425: # 1 - indicating that the daemon should not disconnect.
1426: # Side Effects:
1427: # The reply is written to $client.
1428: #
1429: sub ls_handler {
1430: my ($cmd, $ulsdir, $client) = @_;
1431:
1432: my $userinput = "$cmd:$ulsdir";
1433:
1434: my $obs;
1435: my $rights;
1436: my $ulsout='';
1437: my $ulsfn;
1438: if (-e $ulsdir) {
1439: if(-d $ulsdir) {
1440: if (opendir(LSDIR,$ulsdir)) {
1441: while ($ulsfn=readdir(LSDIR)) {
1442: undef $obs, $rights;
1443: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1444: #We do some obsolete checking here
1445: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1446: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1447: my @obsolete=<FILE>;
1448: foreach my $obsolete (@obsolete) {
1449: if($obsolete =~ m|(<obsolete>)(on)|) { $obs = 1; }
1450: if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
1451: }
1452: }
1453: $ulsout.=$ulsfn.'&'.join('&',@ulsstats);
1454: if($obs eq '1') { $ulsout.="&1"; }
1455: else { $ulsout.="&0"; }
1456: if($rights eq '1') { $ulsout.="&1:"; }
1457: else { $ulsout.="&0:"; }
1458: }
1459: closedir(LSDIR);
1460: }
1461: } else {
1462: my @ulsstats=stat($ulsdir);
1463: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1464: }
1465: } else {
1466: $ulsout='no_such_dir';
1467: }
1468: if ($ulsout eq '') { $ulsout='empty'; }
1.249 foxr 1469: &Reply($client, "$ulsout\n", $userinput); # This supports debug logging.
1.239 foxr 1470:
1471: return 1;
1472:
1473: }
1474: ®ister_handler("ls", \&ls_handler, 0, 1, 0);
1475:
1.218 foxr 1476: # Process a reinit request. Reinit requests that either
1477: # lonc or lond be reinitialized so that an updated
1478: # host.tab or domain.tab can be processed.
1479: #
1480: # Parameters:
1481: # $cmd - the actual keyword that invoked us.
1482: # $tail - the tail of the request that invoked us.
1483: # $client - File descriptor connected to the client
1484: # Returns:
1485: # 1 - Ok to continue processing.
1486: # 0 - Program should exit
1487: # Implicit output:
1488: # a reply is sent to the client.
1489: #
1490: sub reinit_process_handler {
1491: my ($cmd, $tail, $client) = @_;
1492:
1493: my $userinput = "$cmd:$tail";
1494:
1495: my $cert = &GetCertificate($userinput);
1496: if(&ValidManager($cert)) {
1497: chomp($userinput);
1498: my $reply = &ReinitProcess($userinput);
1499: &Reply( $client, "$reply\n", $userinput);
1500: } else {
1501: &Failure( $client, "refused\n", $userinput);
1502: }
1503: return 1;
1504: }
1505: ®ister_handler("reinit", \&reinit_process_handler, 1, 0, 1);
1506:
1507: # Process the editing script for a table edit operation.
1508: # the editing operation must be encrypted and requested by
1509: # a manager host.
1510: #
1511: # Parameters:
1512: # $cmd - the actual keyword that invoked us.
1513: # $tail - the tail of the request that invoked us.
1514: # $client - File descriptor connected to the client
1515: # Returns:
1516: # 1 - Ok to continue processing.
1517: # 0 - Program should exit
1518: # Implicit output:
1519: # a reply is sent to the client.
1520: #
1521: sub edit_table_handler {
1522: my ($command, $tail, $client) = @_;
1523:
1524: my $userinput = "$command:$tail";
1525:
1526: my $cert = &GetCertificate($userinput);
1527: if(&ValidManager($cert)) {
1528: my($filetype, $script) = split(/:/, $tail);
1529: if (($filetype eq "hosts") ||
1530: ($filetype eq "domain")) {
1531: if($script ne "") {
1532: &Reply($client, # BUGBUG - EditFile
1533: &EditFile($userinput), # could fail.
1534: $userinput);
1535: } else {
1536: &Failure($client,"refused\n",$userinput);
1537: }
1538: } else {
1539: &Failure($client,"refused\n",$userinput);
1540: }
1541: } else {
1542: &Failure($client,"refused\n",$userinput);
1543: }
1544: return 1;
1545: }
1.263 albertel 1546: ®ister_handler("edit", \&edit_table_handler, 1, 0, 1);
1.218 foxr 1547:
1.220 foxr 1548: #
1549: # Authenticate a user against the LonCAPA authentication
1550: # database. Note that there are several authentication
1551: # possibilities:
1552: # - unix - The user can be authenticated against the unix
1553: # password file.
1554: # - internal - The user can be authenticated against a purely
1555: # internal per user password file.
1556: # - kerberos - The user can be authenticated against either a kerb4 or kerb5
1557: # ticket granting authority.
1558: # - user - The person tailoring LonCAPA can supply a user authentication
1559: # mechanism that is per system.
1560: #
1561: # Parameters:
1562: # $cmd - The command that got us here.
1563: # $tail - Tail of the command (remaining parameters).
1564: # $client - File descriptor connected to client.
1565: # Returns
1566: # 0 - Requested to exit, caller should shut down.
1567: # 1 - Continue processing.
1568: # Implicit inputs:
1569: # The authentication systems describe above have their own forms of implicit
1570: # input into the authentication process that are described above.
1571: #
1572: sub authenticate_handler {
1573: my ($cmd, $tail, $client) = @_;
1574:
1575:
1576: # Regenerate the full input line
1577:
1578: my $userinput = $cmd.":".$tail;
1579:
1580: # udom - User's domain.
1581: # uname - Username.
1582: # upass - User's password.
1583:
1584: my ($udom,$uname,$upass)=split(/:/,$tail);
1585: &Debug(" Authenticate domain = $udom, user = $uname, password = $upass");
1586: chomp($upass);
1587: $upass=&unescape($upass);
1588:
1589: my $pwdcorrect = &validate_user($udom, $uname, $upass);
1590: if($pwdcorrect) {
1591: &Reply( $client, "authorized\n", $userinput);
1592: #
1593: # Bad credentials: Failed to authorize
1594: #
1595: } else {
1596: &Failure( $client, "non_authorized\n", $userinput);
1597: }
1598:
1599: return 1;
1600: }
1.263 albertel 1601: ®ister_handler("auth", \&authenticate_handler, 1, 1, 0);
1.214 foxr 1602:
1.222 foxr 1603: #
1604: # Change a user's password. Note that this function is complicated by
1605: # the fact that a user may be authenticated in more than one way:
1606: # At present, we are not able to change the password for all types of
1607: # authentication methods. Only for:
1608: # unix - unix password or shadow passoword style authentication.
1609: # local - Locally written authentication mechanism.
1610: # For now, kerb4 and kerb5 password changes are not supported and result
1611: # in an error.
1612: # FUTURE WORK:
1613: # Support kerberos passwd changes?
1614: # Parameters:
1615: # $cmd - The command that got us here.
1616: # $tail - Tail of the command (remaining parameters).
1617: # $client - File descriptor connected to client.
1618: # Returns
1619: # 0 - Requested to exit, caller should shut down.
1620: # 1 - Continue processing.
1621: # Implicit inputs:
1622: # The authentication systems describe above have their own forms of implicit
1623: # input into the authentication process that are described above.
1624: sub change_password_handler {
1625: my ($cmd, $tail, $client) = @_;
1626:
1627: my $userinput = $cmd.":".$tail; # Reconstruct client's string.
1628:
1629: #
1630: # udom - user's domain.
1631: # uname - Username.
1632: # upass - Current password.
1633: # npass - New password.
1634:
1635: my ($udom,$uname,$upass,$npass)=split(/:/,$tail);
1636:
1637: $upass=&unescape($upass);
1638: $npass=&unescape($npass);
1639: &Debug("Trying to change password for $uname");
1640:
1641: # First require that the user can be authenticated with their
1642: # old password:
1643:
1644: my $validated = &validate_user($udom, $uname, $upass);
1645: if($validated) {
1646: my $realpasswd = &get_auth_type($udom, $uname); # Defined since authd.
1647:
1648: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1649: if ($howpwd eq 'internal') {
1650: &Debug("internal auth");
1651: my $salt=time;
1652: $salt=substr($salt,6,2);
1653: my $ncpass=crypt($npass,$salt);
1654: if(&rewrite_password_file($udom, $uname, "internal:$ncpass")) {
1655: &logthis("Result of password change for "
1656: ."$uname: pwchange_success");
1657: &Reply($client, "ok\n", $userinput);
1658: } else {
1659: &logthis("Unable to open $uname passwd "
1660: ."to change password");
1661: &Failure( $client, "non_authorized\n",$userinput);
1662: }
1663: } elsif ($howpwd eq 'unix') {
1664: # Unix means we have to access /etc/password
1665: &Debug("auth is unix");
1666: my $execdir=$perlvar{'lonDaemons'};
1667: &Debug("Opening lcpasswd pipeline");
1668: my $pf = IO::File->new("|$execdir/lcpasswd > "
1669: ."$perlvar{'lonDaemons'}"
1670: ."/logs/lcpasswd.log");
1671: print $pf "$uname\n$npass\n$npass\n";
1672: close $pf;
1673: my $err = $?;
1674: my $result = ($err>0 ? 'pwchange_failure' : 'ok');
1675: &logthis("Result of password change for $uname: ".
1676: &lcpasswdstrerror($?));
1677: &Reply($client, "$result\n", $userinput);
1678: } else {
1679: # this just means that the current password mode is not
1680: # one we know how to change (e.g the kerberos auth modes or
1681: # locally written auth handler).
1682: #
1683: &Failure( $client, "auth_mode_error\n", $userinput);
1684: }
1685:
1.224 foxr 1686: } else {
1.222 foxr 1687: &Failure( $client, "non_authorized\n", $userinput);
1688: }
1689:
1690: return 1;
1691: }
1.263 albertel 1692: ®ister_handler("passwd", \&change_password_handler, 1, 1, 0);
1.222 foxr 1693:
1.225 foxr 1694: #
1695: # Create a new user. User in this case means a lon-capa user.
1696: # The user must either already exist in some authentication realm
1697: # like kerberos or the /etc/passwd. If not, a user completely local to
1698: # this loncapa system is created.
1699: #
1700: # Parameters:
1701: # $cmd - The command that got us here.
1702: # $tail - Tail of the command (remaining parameters).
1703: # $client - File descriptor connected to client.
1704: # Returns
1705: # 0 - Requested to exit, caller should shut down.
1706: # 1 - Continue processing.
1707: # Implicit inputs:
1708: # The authentication systems describe above have their own forms of implicit
1709: # input into the authentication process that are described above.
1710: sub add_user_handler {
1711:
1712: my ($cmd, $tail, $client) = @_;
1713:
1714:
1715: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
1716: my $userinput = $cmd.":".$tail; # Reconstruct the full request line.
1717:
1718: &Debug("cmd =".$cmd." $udom =".$udom." uname=".$uname);
1719:
1720:
1721: if($udom eq $currentdomainid) { # Reject new users for other domains...
1722:
1723: my $oldumask=umask(0077);
1724: chomp($npass);
1725: $npass=&unescape($npass);
1726: my $passfilename = &password_path($udom, $uname);
1727: &Debug("Password file created will be:".$passfilename);
1728: if (-e $passfilename) {
1729: &Failure( $client, "already_exists\n", $userinput);
1730: } else {
1731: my $fperror='';
1.264 albertel 1732: if (!&mkpath($passfilename)) {
1733: $fperror="error: ".($!+0)." mkdir failed while attempting "
1734: ."makeuser";
1.225 foxr 1735: }
1736: unless ($fperror) {
1737: my $result=&make_passwd_file($uname, $umode,$npass, $passfilename);
1738: &Reply($client, $result, $userinput); #BUGBUG - could be fail
1739: } else {
1740: &Failure($client, "$fperror\n", $userinput);
1741: }
1742: }
1743: umask($oldumask);
1744: } else {
1745: &Failure($client, "not_right_domain\n",
1746: $userinput); # Even if we are multihomed.
1747:
1748: }
1749: return 1;
1750:
1751: }
1752: ®ister_handler("makeuser", \&add_user_handler, 1, 1, 0);
1753:
1754: #
1755: # Change the authentication method of a user. Note that this may
1756: # also implicitly change the user's password if, for example, the user is
1757: # joining an existing authentication realm. Known authentication realms at
1758: # this time are:
1759: # internal - Purely internal password file (only loncapa knows this user)
1760: # local - Institutionally written authentication module.
1761: # unix - Unix user (/etc/passwd with or without /etc/shadow).
1762: # kerb4 - kerberos version 4
1763: # kerb5 - kerberos version 5
1764: #
1765: # Parameters:
1766: # $cmd - The command that got us here.
1767: # $tail - Tail of the command (remaining parameters).
1768: # $client - File descriptor connected to client.
1769: # Returns
1770: # 0 - Requested to exit, caller should shut down.
1771: # 1 - Continue processing.
1772: # Implicit inputs:
1773: # The authentication systems describe above have their own forms of implicit
1774: # input into the authentication process that are described above.
1775: #
1776: sub change_authentication_handler {
1777:
1778: my ($cmd, $tail, $client) = @_;
1779:
1780: my $userinput = "$cmd:$tail"; # Reconstruct user input.
1781:
1782: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
1783: &Debug("cmd = ".$cmd." domain= ".$udom."uname =".$uname." umode= ".$umode);
1784: if ($udom ne $currentdomainid) {
1785: &Failure( $client, "not_right_domain\n", $client);
1786: } else {
1787:
1788: chomp($npass);
1789:
1790: $npass=&unescape($npass);
1.261 foxr 1791: my $oldauth = &get_auth_type($udom, $uname); # Get old auth info.
1.225 foxr 1792: my $passfilename = &password_path($udom, $uname);
1793: if ($passfilename) { # Not allowed to create a new user!!
1794: my $result=&make_passwd_file($uname, $umode,$npass,$passfilename);
1.261 foxr 1795: #
1796: # If the current auth mode is internal, and the old auth mode was
1797: # unix, or krb*, and the user is an author for this domain,
1798: # re-run manage_permissions for that role in order to be able
1799: # to take ownership of the construction space back to www:www
1800: #
1801:
1.276 ! foxr 1802: if( (($oldauth =~ /^unix/) && ($umode eq "internal")) ||
! 1803: (($oldauth =~ /^internal/) && ($umode eq "unix")) ) {
1.261 foxr 1804: if(&is_author($udom, $uname)) {
1805: &Debug(" Need to manage author permissions...");
1.276 ! foxr 1806: &manage_permissions("/$udom/_au", $udom, $uname, "$umode:");
1.261 foxr 1807: }
1808: }
1809:
1810:
1.225 foxr 1811: &Reply($client, $result, $userinput);
1812: } else {
1.251 foxr 1813: &Failure($client, "non_authorized\n", $userinput); # Fail the user now.
1.225 foxr 1814: }
1815: }
1816: return 1;
1817: }
1818: ®ister_handler("changeuserauth", \&change_authentication_handler, 1,1, 0);
1819:
1820: #
1821: # Determines if this is the home server for a user. The home server
1822: # for a user will have his/her lon-capa passwd file. Therefore all we need
1823: # to do is determine if this file exists.
1824: #
1825: # Parameters:
1826: # $cmd - The command that got us here.
1827: # $tail - Tail of the command (remaining parameters).
1828: # $client - File descriptor connected to client.
1829: # Returns
1830: # 0 - Requested to exit, caller should shut down.
1831: # 1 - Continue processing.
1832: # Implicit inputs:
1833: # The authentication systems describe above have their own forms of implicit
1834: # input into the authentication process that are described above.
1835: #
1836: sub is_home_handler {
1837: my ($cmd, $tail, $client) = @_;
1838:
1839: my $userinput = "$cmd:$tail";
1840:
1841: my ($udom,$uname)=split(/:/,$tail);
1842: chomp($uname);
1843: my $passfile = &password_filename($udom, $uname);
1844: if($passfile) {
1845: &Reply( $client, "found\n", $userinput);
1846: } else {
1847: &Failure($client, "not_found\n", $userinput);
1848: }
1849: return 1;
1850: }
1851: ®ister_handler("home", \&is_home_handler, 0,1,0);
1852:
1853: #
1854: # Process an update request for a resource?? I think what's going on here is
1855: # that a resource has been modified that we hold a subscription to.
1856: # If the resource is not local, then we must update, or at least invalidate our
1857: # cached copy of the resource.
1858: # FUTURE WORK:
1859: # I need to look at this logic carefully. My druthers would be to follow
1860: # typical caching logic, and simple invalidate the cache, drop any subscription
1861: # an let the next fetch start the ball rolling again... however that may
1862: # actually be more difficult than it looks given the complex web of
1863: # proxy servers.
1864: # Parameters:
1865: # $cmd - The command that got us here.
1866: # $tail - Tail of the command (remaining parameters).
1867: # $client - File descriptor connected to client.
1868: # Returns
1869: # 0 - Requested to exit, caller should shut down.
1870: # 1 - Continue processing.
1871: # Implicit inputs:
1872: # The authentication systems describe above have their own forms of implicit
1873: # input into the authentication process that are described above.
1874: #
1875: sub update_resource_handler {
1876:
1877: my ($cmd, $tail, $client) = @_;
1878:
1879: my $userinput = "$cmd:$tail";
1880:
1881: my $fname= $tail; # This allows interactive testing
1882:
1883:
1884: my $ownership=ishome($fname);
1885: if ($ownership eq 'not_owner') {
1886: if (-e $fname) {
1887: my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
1888: $atime,$mtime,$ctime,$blksize,$blocks)=stat($fname);
1889: my $now=time;
1890: my $since=$now-$atime;
1891: if ($since>$perlvar{'lonExpire'}) {
1892: my $reply=&reply("unsub:$fname","$clientname");
1893: unlink("$fname");
1894: } else {
1895: my $transname="$fname.in.transfer";
1896: my $remoteurl=&reply("sub:$fname","$clientname");
1897: my $response;
1898: alarm(120);
1899: {
1900: my $ua=new LWP::UserAgent;
1901: my $request=new HTTP::Request('GET',"$remoteurl");
1902: $response=$ua->request($request,$transname);
1903: }
1904: alarm(0);
1905: if ($response->is_error()) {
1906: unlink($transname);
1907: my $message=$response->status_line;
1908: &logthis("LWP GET: $message for $fname ($remoteurl)");
1909: } else {
1910: if ($remoteurl!~/\.meta$/) {
1911: alarm(120);
1912: {
1913: my $ua=new LWP::UserAgent;
1914: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1915: my $mresponse=$ua->request($mrequest,$fname.'.meta');
1916: if ($mresponse->is_error()) {
1917: unlink($fname.'.meta');
1918: }
1919: }
1920: alarm(0);
1921: }
1922: rename($transname,$fname);
1923: }
1924: }
1925: &Reply( $client, "ok\n", $userinput);
1926: } else {
1927: &Failure($client, "not_found\n", $userinput);
1928: }
1929: } else {
1930: &Failure($client, "rejected\n", $userinput);
1931: }
1932: return 1;
1933: }
1934: ®ister_handler("update", \&update_resource_handler, 0 ,1, 0);
1935:
1936: #
1.226 foxr 1937: # Fetch a user file from a remote server to the user's home directory
1938: # userfiles subdir.
1.225 foxr 1939: # Parameters:
1940: # $cmd - The command that got us here.
1941: # $tail - Tail of the command (remaining parameters).
1942: # $client - File descriptor connected to client.
1943: # Returns
1944: # 0 - Requested to exit, caller should shut down.
1945: # 1 - Continue processing.
1946: #
1947: sub fetch_user_file_handler {
1948:
1949: my ($cmd, $tail, $client) = @_;
1950:
1951: my $userinput = "$cmd:$tail";
1952: my $fname = $tail;
1.232 foxr 1953: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
1.225 foxr 1954: my $udir=&propath($udom,$uname).'/userfiles';
1955: unless (-e $udir) {
1956: mkdir($udir,0770);
1957: }
1.232 foxr 1958: Debug("fetch user file for $fname");
1.225 foxr 1959: if (-e $udir) {
1960: $ufile=~s/^[\.\~]+//;
1.232 foxr 1961:
1962: # IF necessary, create the path right down to the file.
1963: # Note that any regular files in the way of this path are
1964: # wiped out to deal with some earlier folly of mine.
1965:
1.267 raeburn 1966: if (!&mkpath($udir.'/'.$ufile)) {
1.264 albertel 1967: &Failure($client, "unable_to_create\n", $userinput);
1.232 foxr 1968: }
1969:
1.225 foxr 1970: my $destname=$udir.'/'.$ufile;
1971: my $transname=$udir.'/'.$ufile.'.in.transit';
1972: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
1973: my $response;
1.232 foxr 1974: Debug("Remote URL : $remoteurl Transfername $transname Destname: $destname");
1.225 foxr 1975: alarm(120);
1976: {
1977: my $ua=new LWP::UserAgent;
1978: my $request=new HTTP::Request('GET',"$remoteurl");
1979: $response=$ua->request($request,$transname);
1980: }
1981: alarm(0);
1982: if ($response->is_error()) {
1983: unlink($transname);
1984: my $message=$response->status_line;
1985: &logthis("LWP GET: $message for $fname ($remoteurl)");
1986: &Failure($client, "failed\n", $userinput);
1987: } else {
1.232 foxr 1988: Debug("Renaming $transname to $destname");
1.225 foxr 1989: if (!rename($transname,$destname)) {
1990: &logthis("Unable to move $transname to $destname");
1991: unlink($transname);
1992: &Failure($client, "failed\n", $userinput);
1993: } else {
1994: &Reply($client, "ok\n", $userinput);
1995: }
1996: }
1997: } else {
1998: &Failure($client, "not_home\n", $userinput);
1999: }
2000: return 1;
2001: }
2002: ®ister_handler("fetchuserfile", \&fetch_user_file_handler, 0, 1, 0);
2003:
1.226 foxr 2004: #
2005: # Remove a file from a user's home directory userfiles subdirectory.
2006: # Parameters:
2007: # cmd - the Lond request keyword that got us here.
2008: # tail - the part of the command past the keyword.
2009: # client- File descriptor connected with the client.
2010: #
2011: # Returns:
2012: # 1 - Continue processing.
2013: sub remove_user_file_handler {
2014: my ($cmd, $tail, $client) = @_;
2015:
2016: my ($fname) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2017:
2018: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
2019: if ($ufile =~m|/\.\./|) {
2020: # any files paths with /../ in them refuse
2021: # to deal with
2022: &Failure($client, "refused\n", "$cmd:$tail");
2023: } else {
2024: my $udir = &propath($udom,$uname);
2025: if (-e $udir) {
2026: my $file=$udir.'/userfiles/'.$ufile;
2027: if (-e $file) {
1.253 foxr 2028: #
2029: # If the file is a regular file unlink is fine...
2030: # However it's possible the client wants a dir.
2031: # removed, in which case rmdir is more approprate:
2032: #
1.240 banghart 2033: if (-f $file){
1.241 albertel 2034: unlink($file);
2035: } elsif(-d $file) {
2036: rmdir($file);
1.240 banghart 2037: }
1.226 foxr 2038: if (-e $file) {
1.253 foxr 2039: # File is still there after we deleted it ?!?
2040:
1.226 foxr 2041: &Failure($client, "failed\n", "$cmd:$tail");
2042: } else {
2043: &Reply($client, "ok\n", "$cmd:$tail");
2044: }
2045: } else {
2046: &Failure($client, "not_found\n", "$cmd:$tail");
2047: }
2048: } else {
2049: &Failure($client, "not_home\n", "$cmd:$tail");
2050: }
2051: }
2052: return 1;
2053: }
2054: ®ister_handler("removeuserfile", \&remove_user_file_handler, 0,1,0);
2055:
1.236 albertel 2056: #
2057: # make a directory in a user's home directory userfiles subdirectory.
2058: # Parameters:
2059: # cmd - the Lond request keyword that got us here.
2060: # tail - the part of the command past the keyword.
2061: # client- File descriptor connected with the client.
2062: #
2063: # Returns:
2064: # 1 - Continue processing.
2065: sub mkdir_user_file_handler {
2066: my ($cmd, $tail, $client) = @_;
2067:
2068: my ($dir) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2069: $dir=&unescape($dir);
2070: my ($udom,$uname,$ufile) = ($dir =~ m|^([^/]+)/([^/]+)/(.+)$|);
2071: if ($ufile =~m|/\.\./|) {
2072: # any files paths with /../ in them refuse
2073: # to deal with
2074: &Failure($client, "refused\n", "$cmd:$tail");
2075: } else {
2076: my $udir = &propath($udom,$uname);
2077: if (-e $udir) {
1.264 albertel 2078: my $newdir=$udir.'/userfiles/'.$ufile.'/';
2079: if (!&mkpath($newdir)) {
2080: &Failure($client, "failed\n", "$cmd:$tail");
1.236 albertel 2081: }
1.264 albertel 2082: &Reply($client, "ok\n", "$cmd:$tail");
1.236 albertel 2083: } else {
2084: &Failure($client, "not_home\n", "$cmd:$tail");
2085: }
2086: }
2087: return 1;
2088: }
2089: ®ister_handler("mkdiruserfile", \&mkdir_user_file_handler, 0,1,0);
2090:
1.237 albertel 2091: #
2092: # rename a file in a user's home directory userfiles subdirectory.
2093: # Parameters:
2094: # cmd - the Lond request keyword that got us here.
2095: # tail - the part of the command past the keyword.
2096: # client- File descriptor connected with the client.
2097: #
2098: # Returns:
2099: # 1 - Continue processing.
2100: sub rename_user_file_handler {
2101: my ($cmd, $tail, $client) = @_;
2102:
2103: my ($udom,$uname,$old,$new) = split(/:/, $tail);
2104: $old=&unescape($old);
2105: $new=&unescape($new);
2106: if ($new =~m|/\.\./| || $old =~m|/\.\./|) {
2107: # any files paths with /../ in them refuse to deal with
2108: &Failure($client, "refused\n", "$cmd:$tail");
2109: } else {
2110: my $udir = &propath($udom,$uname);
2111: if (-e $udir) {
2112: my $oldfile=$udir.'/userfiles/'.$old;
2113: my $newfile=$udir.'/userfiles/'.$new;
2114: if (-e $newfile) {
2115: &Failure($client, "exists\n", "$cmd:$tail");
2116: } elsif (! -e $oldfile) {
2117: &Failure($client, "not_found\n", "$cmd:$tail");
2118: } else {
2119: if (!rename($oldfile,$newfile)) {
2120: &Failure($client, "failed\n", "$cmd:$tail");
2121: } else {
2122: &Reply($client, "ok\n", "$cmd:$tail");
2123: }
2124: }
2125: } else {
2126: &Failure($client, "not_home\n", "$cmd:$tail");
2127: }
2128: }
2129: return 1;
2130: }
2131: ®ister_handler("renameuserfile", \&rename_user_file_handler, 0,1,0);
2132:
1.227 foxr 2133: #
1.263 albertel 2134: # Authenticate access to a user file by checking that the token the user's
2135: # passed also exists in their session file
1.227 foxr 2136: #
2137: # Parameters:
2138: # cmd - The request keyword that dispatched to tus.
2139: # tail - The tail of the request (colon separated parameters).
2140: # client - Filehandle open on the client.
2141: # Return:
2142: # 1.
2143: sub token_auth_user_file_handler {
2144: my ($cmd, $tail, $client) = @_;
2145:
2146: my ($fname, $session) = split(/:/, $tail);
2147:
2148: chomp($session);
1.251 foxr 2149: my $reply="non_auth\n";
1.227 foxr 2150: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
2151: $session.'.id')) {
2152: while (my $line=<ENVIN>) {
1.251 foxr 2153: if ($line=~ m|userfile\.\Q$fname\E\=|) { $reply="ok\n"; }
1.227 foxr 2154: }
2155: close(ENVIN);
1.251 foxr 2156: &Reply($client, $reply, "$cmd:$tail");
1.227 foxr 2157: } else {
2158: &Failure($client, "invalid_token\n", "$cmd:$tail");
2159: }
2160: return 1;
2161:
2162: }
2163: ®ister_handler("tokenauthuserfile", \&token_auth_user_file_handler, 0,1,0);
1.229 foxr 2164:
2165: #
2166: # Unsubscribe from a resource.
2167: #
2168: # Parameters:
2169: # $cmd - The command that got us here.
2170: # $tail - Tail of the command (remaining parameters).
2171: # $client - File descriptor connected to client.
2172: # Returns
2173: # 0 - Requested to exit, caller should shut down.
2174: # 1 - Continue processing.
2175: #
2176: sub unsubscribe_handler {
2177: my ($cmd, $tail, $client) = @_;
2178:
2179: my $userinput= "$cmd:$tail";
2180:
2181: my ($fname) = split(/:/,$tail); # Split in case there's extrs.
2182:
2183: &Debug("Unsubscribing $fname");
2184: if (-e $fname) {
2185: &Debug("Exists");
2186: &Reply($client, &unsub($fname,$clientip), $userinput);
2187: } else {
2188: &Failure($client, "not_found\n", $userinput);
2189: }
2190: return 1;
2191: }
2192: ®ister_handler("unsub", \&unsubscribe_handler, 0, 1, 0);
1.263 albertel 2193:
1.230 foxr 2194: # Subscribe to a resource
2195: #
2196: # Parameters:
2197: # $cmd - The command that got us here.
2198: # $tail - Tail of the command (remaining parameters).
2199: # $client - File descriptor connected to client.
2200: # Returns
2201: # 0 - Requested to exit, caller should shut down.
2202: # 1 - Continue processing.
2203: #
2204: sub subscribe_handler {
2205: my ($cmd, $tail, $client)= @_;
2206:
2207: my $userinput = "$cmd:$tail";
2208:
2209: &Reply( $client, &subscribe($userinput,$clientip), $userinput);
2210:
2211: return 1;
2212: }
2213: ®ister_handler("sub", \&subscribe_handler, 0, 1, 0);
2214:
2215: #
2216: # Determine the version of a resource (?) Or is it return
2217: # the top version of the resource? Not yet clear from the
2218: # code in currentversion.
2219: #
2220: # Parameters:
2221: # $cmd - The command that got us here.
2222: # $tail - Tail of the command (remaining parameters).
2223: # $client - File descriptor connected to client.
2224: # Returns
2225: # 0 - Requested to exit, caller should shut down.
2226: # 1 - Continue processing.
2227: #
2228: sub current_version_handler {
2229: my ($cmd, $tail, $client) = @_;
2230:
2231: my $userinput= "$cmd:$tail";
2232:
2233: my $fname = $tail;
2234: &Reply( $client, ¤tversion($fname)."\n", $userinput);
2235: return 1;
2236:
2237: }
2238: ®ister_handler("currentversion", \¤t_version_handler, 0, 1, 0);
2239:
2240: # Make an entry in a user's activity log.
2241: #
2242: # Parameters:
2243: # $cmd - The command that got us here.
2244: # $tail - Tail of the command (remaining parameters).
2245: # $client - File descriptor connected to client.
2246: # Returns
2247: # 0 - Requested to exit, caller should shut down.
2248: # 1 - Continue processing.
2249: #
2250: sub activity_log_handler {
2251: my ($cmd, $tail, $client) = @_;
2252:
2253:
2254: my $userinput= "$cmd:$tail";
2255:
2256: my ($udom,$uname,$what)=split(/:/,$tail);
2257: chomp($what);
2258: my $proname=&propath($udom,$uname);
2259: my $now=time;
2260: my $hfh;
2261: if ($hfh=IO::File->new(">>$proname/activity.log")) {
2262: print $hfh "$now:$clientname:$what\n";
2263: &Reply( $client, "ok\n", $userinput);
2264: } else {
2265: &Failure($client, "error: ".($!+0)." IO::File->new Failed "
2266: ."while attempting log\n",
2267: $userinput);
2268: }
2269:
2270: return 1;
2271: }
1.263 albertel 2272: ®ister_handler("log", \&activity_log_handler, 0, 1, 0);
1.230 foxr 2273:
2274: #
2275: # Put a namespace entry in a user profile hash.
2276: # My druthers would be for this to be an encrypted interaction too.
2277: # anything that might be an inadvertent covert channel about either
2278: # user authentication or user personal information....
2279: #
2280: # Parameters:
2281: # $cmd - The command that got us here.
2282: # $tail - Tail of the command (remaining parameters).
2283: # $client - File descriptor connected to client.
2284: # Returns
2285: # 0 - Requested to exit, caller should shut down.
2286: # 1 - Continue processing.
2287: #
2288: sub put_user_profile_entry {
2289: my ($cmd, $tail, $client) = @_;
1.229 foxr 2290:
1.230 foxr 2291: my $userinput = "$cmd:$tail";
2292:
1.242 raeburn 2293: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
1.230 foxr 2294: if ($namespace ne 'roles') {
2295: chomp($what);
2296: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2297: &GDBM_WRCREAT(),"P",$what);
2298: if($hashref) {
2299: my @pairs=split(/\&/,$what);
2300: foreach my $pair (@pairs) {
2301: my ($key,$value)=split(/=/,$pair);
2302: $hashref->{$key}=$value;
2303: }
2304: if (untie(%$hashref)) {
2305: &Reply( $client, "ok\n", $userinput);
2306: } else {
2307: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2308: "while attempting put\n",
2309: $userinput);
2310: }
2311: } else {
2312: &Failure( $client, "error: ".($!)." tie(GDBM) Failed ".
2313: "while attempting put\n", $userinput);
2314: }
2315: } else {
2316: &Failure( $client, "refused\n", $userinput);
2317: }
2318:
2319: return 1;
2320: }
2321: ®ister_handler("put", \&put_user_profile_entry, 0, 1, 0);
2322:
2323: #
2324: # Increment a profile entry in the user history file.
2325: # The history contains keyword value pairs. In this case,
2326: # The value itself is a pair of numbers. The first, the current value
2327: # the second an increment that this function applies to the current
2328: # value.
2329: #
2330: # Parameters:
2331: # $cmd - The command that got us here.
2332: # $tail - Tail of the command (remaining parameters).
2333: # $client - File descriptor connected to client.
2334: # Returns
2335: # 0 - Requested to exit, caller should shut down.
2336: # 1 - Continue processing.
2337: #
2338: sub increment_user_value_handler {
2339: my ($cmd, $tail, $client) = @_;
2340:
2341: my $userinput = "$cmd:$tail";
2342:
2343: my ($udom,$uname,$namespace,$what) =split(/:/,$tail);
2344: if ($namespace ne 'roles') {
2345: chomp($what);
2346: my $hashref = &tie_user_hash($udom, $uname,
2347: $namespace, &GDBM_WRCREAT(),
2348: "P",$what);
2349: if ($hashref) {
2350: my @pairs=split(/\&/,$what);
2351: foreach my $pair (@pairs) {
2352: my ($key,$value)=split(/=/,$pair);
2353: # We could check that we have a number...
2354: if (! defined($value) || $value eq '') {
2355: $value = 1;
2356: }
2357: $hashref->{$key}+=$value;
2358: }
2359: if (untie(%$hashref)) {
2360: &Reply( $client, "ok\n", $userinput);
2361: } else {
2362: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2363: "while attempting inc\n", $userinput);
2364: }
2365: } else {
2366: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2367: "while attempting inc\n", $userinput);
2368: }
2369: } else {
2370: &Failure($client, "refused\n", $userinput);
2371: }
2372:
2373: return 1;
2374: }
2375: ®ister_handler("inc", \&increment_user_value_handler, 0, 1, 0);
2376:
2377: #
2378: # Put a new role for a user. Roles are LonCAPA's packaging of permissions.
2379: # Each 'role' a user has implies a set of permissions. Adding a new role
2380: # for a person grants the permissions packaged with that role
2381: # to that user when the role is selected.
2382: #
2383: # Parameters:
2384: # $cmd - The command string (rolesput).
2385: # $tail - The remainder of the request line. For rolesput this
2386: # consists of a colon separated list that contains:
2387: # The domain and user that is granting the role (logged).
2388: # The domain and user that is getting the role.
2389: # The roles being granted as a set of & separated pairs.
2390: # each pair a key value pair.
2391: # $client - File descriptor connected to the client.
2392: # Returns:
2393: # 0 - If the daemon should exit
2394: # 1 - To continue processing.
2395: #
2396: #
2397: sub roles_put_handler {
2398: my ($cmd, $tail, $client) = @_;
2399:
2400: my $userinput = "$cmd:$tail";
2401:
2402: my ( $exedom, $exeuser, $udom, $uname, $what) = split(/:/,$tail);
2403:
2404:
2405: my $namespace='roles';
2406: chomp($what);
2407: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2408: &GDBM_WRCREAT(), "P",
2409: "$exedom:$exeuser:$what");
2410: #
2411: # Log the attempt to set a role. The {}'s here ensure that the file
2412: # handle is open for the minimal amount of time. Since the flush
2413: # is done on close this improves the chances the log will be an un-
2414: # corrupted ordered thing.
2415: if ($hashref) {
1.261 foxr 2416: my $pass_entry = &get_auth_type($udom, $uname);
2417: my ($auth_type,$pwd) = split(/:/, $pass_entry);
2418: $auth_type = $auth_type.":";
1.230 foxr 2419: my @pairs=split(/\&/,$what);
2420: foreach my $pair (@pairs) {
2421: my ($key,$value)=split(/=/,$pair);
2422: &manage_permissions($key, $udom, $uname,
1.260 foxr 2423: $auth_type);
1.230 foxr 2424: $hashref->{$key}=$value;
2425: }
2426: if (untie($hashref)) {
2427: &Reply($client, "ok\n", $userinput);
2428: } else {
2429: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2430: "while attempting rolesput\n", $userinput);
2431: }
2432: } else {
2433: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2434: "while attempting rolesput\n", $userinput);
2435: }
2436: return 1;
2437: }
2438: ®ister_handler("rolesput", \&roles_put_handler, 1,1,0); # Encoded client only.
2439:
2440: #
1.231 foxr 2441: # Deletes (removes) a role for a user. This is equivalent to removing
2442: # a permissions package associated with the role from the user's profile.
2443: #
2444: # Parameters:
2445: # $cmd - The command (rolesdel)
2446: # $tail - The remainder of the request line. This consists
2447: # of:
2448: # The domain and user requesting the change (logged)
2449: # The domain and user being changed.
2450: # The roles being revoked. These are shipped to us
2451: # as a bunch of & separated role name keywords.
2452: # $client - The file handle open on the client.
2453: # Returns:
2454: # 1 - Continue processing
2455: # 0 - Exit.
2456: #
2457: sub roles_delete_handler {
2458: my ($cmd, $tail, $client) = @_;
2459:
2460: my $userinput = "$cmd:$tail";
2461:
2462: my ($exedom,$exeuser,$udom,$uname,$what)=split(/:/,$tail);
2463: &Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom.
2464: "what = ".$what);
2465: my $namespace='roles';
2466: chomp($what);
2467: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2468: &GDBM_WRCREAT(), "D",
2469: "$exedom:$exeuser:$what");
2470:
2471: if ($hashref) {
2472: my @rolekeys=split(/\&/,$what);
2473:
2474: foreach my $key (@rolekeys) {
2475: delete $hashref->{$key};
2476: }
2477: if (untie(%$hashref)) {
2478: &Reply($client, "ok\n", $userinput);
2479: } else {
2480: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2481: "while attempting rolesdel\n", $userinput);
2482: }
2483: } else {
2484: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2485: "while attempting rolesdel\n", $userinput);
2486: }
2487:
2488: return 1;
2489: }
2490: ®ister_handler("rolesdel", \&roles_delete_handler, 1,1, 0); # Encoded client only
2491:
2492: # Unencrypted get from a user's profile database. See
2493: # GetProfileEntryEncrypted for a version that does end-to-end encryption.
2494: # This function retrieves a keyed item from a specific named database in the
2495: # user's directory.
2496: #
2497: # Parameters:
2498: # $cmd - Command request keyword (get).
2499: # $tail - Tail of the command. This is a colon separated list
2500: # consisting of the domain and username that uniquely
2501: # identifies the profile,
2502: # The 'namespace' which selects the gdbm file to
2503: # do the lookup in,
2504: # & separated list of keys to lookup. Note that
2505: # the values are returned as an & separated list too.
2506: # $client - File descriptor open on the client.
2507: # Returns:
2508: # 1 - Continue processing.
2509: # 0 - Exit.
2510: #
2511: sub get_profile_entry {
2512: my ($cmd, $tail, $client) = @_;
2513:
2514: my $userinput= "$cmd:$tail";
2515:
2516: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2517: chomp($what);
1.255 foxr 2518:
2519: my $replystring = read_profile($udom, $uname, $namespace, $what);
2520: my ($first) = split(/:/,$replystring);
2521: if($first ne "error") {
2522: &Reply($client, "$replystring\n", $userinput);
1.231 foxr 2523: } else {
1.255 foxr 2524: &Failure($client, $replystring." while attempting get\n", $userinput);
1.231 foxr 2525: }
2526: return 1;
1.255 foxr 2527:
2528:
1.231 foxr 2529: }
2530: ®ister_handler("get", \&get_profile_entry, 0,1,0);
2531:
2532: #
2533: # Process the encrypted get request. Note that the request is sent
2534: # in clear, but the reply is encrypted. This is a small covert channel:
2535: # information about the sensitive keys is given to the snooper. Just not
2536: # information about the values of the sensitive key. Hmm if I wanted to
2537: # know these I'd snoop for the egets. Get the profile item names from them
2538: # and then issue a get for them since there's no enforcement of the
2539: # requirement of an encrypted get for particular profile items. If I
2540: # were re-doing this, I'd force the request to be encrypted as well as the
2541: # reply. I'd also just enforce encrypted transactions for all gets since
2542: # that would prevent any covert channel snooping.
2543: #
2544: # Parameters:
2545: # $cmd - Command keyword of request (eget).
2546: # $tail - Tail of the command. See GetProfileEntry
# for more information about this.
2547: # $client - File open on the client.
2548: # Returns:
2549: # 1 - Continue processing
2550: # 0 - server should exit.
2551: sub get_profile_entry_encrypted {
2552: my ($cmd, $tail, $client) = @_;
2553:
2554: my $userinput = "$cmd:$tail";
2555:
2556: my ($cmd,$udom,$uname,$namespace,$what) = split(/:/,$userinput);
2557: chomp($what);
1.255 foxr 2558: my $qresult = read_profile($udom, $uname, $namespace, $what);
2559: my ($first) = split(/:/, $qresult);
2560: if($first ne "error") {
2561:
2562: if ($cipher) {
2563: my $cmdlength=length($qresult);
2564: $qresult.=" ";
2565: my $encqresult='';
2566: for(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
2567: $encqresult.= unpack("H16",
2568: $cipher->encrypt(substr($qresult,
2569: $encidx,
2570: 8)));
2571: }
2572: &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput);
2573: } else {
1.231 foxr 2574: &Failure( $client, "error:no_key\n", $userinput);
2575: }
2576: } else {
1.255 foxr 2577: &Failure($client, "$qresult while attempting eget\n", $userinput);
2578:
1.231 foxr 2579: }
2580:
2581: return 1;
2582: }
1.255 foxr 2583: ®ister_handler("eget", \&get_profile_entry_encrypted, 0, 1, 0);
1.263 albertel 2584:
1.231 foxr 2585: #
2586: # Deletes a key in a user profile database.
2587: #
2588: # Parameters:
2589: # $cmd - Command keyword (del).
2590: # $tail - Command tail. IN this case a colon
2591: # separated list containing:
2592: # The domain and user that identifies uniquely
2593: # the identity of the user.
2594: # The profile namespace (name of the profile
2595: # database file).
2596: # & separated list of keywords to delete.
2597: # $client - File open on client socket.
2598: # Returns:
2599: # 1 - Continue processing
2600: # 0 - Exit server.
2601: #
2602: #
2603: sub delete_profile_entry {
2604: my ($cmd, $tail, $client) = @_;
2605:
2606: my $userinput = "cmd:$tail";
2607:
2608: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2609: chomp($what);
2610: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2611: &GDBM_WRCREAT(),
2612: "D",$what);
2613: if ($hashref) {
2614: my @keys=split(/\&/,$what);
2615: foreach my $key (@keys) {
2616: delete($hashref->{$key});
2617: }
2618: if (untie(%$hashref)) {
2619: &Reply($client, "ok\n", $userinput);
2620: } else {
2621: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2622: "while attempting del\n", $userinput);
2623: }
2624: } else {
2625: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2626: "while attempting del\n", $userinput);
2627: }
2628: return 1;
2629: }
2630: ®ister_handler("del", \&delete_profile_entry, 0, 1, 0);
1.263 albertel 2631:
1.231 foxr 2632: #
2633: # List the set of keys that are defined in a profile database file.
2634: # A successful reply from this will contain an & separated list of
2635: # the keys.
2636: # Parameters:
2637: # $cmd - Command request (keys).
2638: # $tail - Remainder of the request, a colon separated
2639: # list containing domain/user that identifies the
2640: # user being queried, and the database namespace
2641: # (database filename essentially).
2642: # $client - File open on the client.
2643: # Returns:
2644: # 1 - Continue processing.
2645: # 0 - Exit the server.
2646: #
2647: sub get_profile_keys {
2648: my ($cmd, $tail, $client) = @_;
2649:
2650: my $userinput = "$cmd:$tail";
2651:
2652: my ($udom,$uname,$namespace)=split(/:/,$tail);
2653: my $qresult='';
2654: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2655: &GDBM_READER());
2656: if ($hashref) {
2657: foreach my $key (keys %$hashref) {
2658: $qresult.="$key&";
2659: }
2660: if (untie(%$hashref)) {
2661: $qresult=~s/\&$//;
2662: &Reply($client, "$qresult\n", $userinput);
2663: } else {
2664: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2665: "while attempting keys\n", $userinput);
2666: }
2667: } else {
2668: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2669: "while attempting keys\n", $userinput);
2670: }
2671:
2672: return 1;
2673: }
2674: ®ister_handler("keys", \&get_profile_keys, 0, 1, 0);
2675:
2676: #
2677: # Dump the contents of a user profile database.
2678: # Note that this constitutes a very large covert channel too since
2679: # the dump will return sensitive information that is not encrypted.
2680: # The naive security assumption is that the session negotiation ensures
2681: # our client is trusted and I don't believe that's assured at present.
2682: # Sure want badly to go to ssl or tls. Of course if my peer isn't really
2683: # a LonCAPA node they could have negotiated an encryption key too so >sigh<.
2684: #
2685: # Parameters:
2686: # $cmd - The command request keyword (currentdump).
2687: # $tail - Remainder of the request, consisting of a colon
2688: # separated list that has the domain/username and
2689: # the namespace to dump (database file).
2690: # $client - file open on the remote client.
2691: # Returns:
2692: # 1 - Continue processing.
2693: # 0 - Exit the server.
2694: #
2695: sub dump_profile_database {
2696: my ($cmd, $tail, $client) = @_;
2697:
2698: my $userinput = "$cmd:$tail";
2699:
2700: my ($udom,$uname,$namespace) = split(/:/,$tail);
2701: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2702: &GDBM_READER());
2703: if ($hashref) {
2704: # Structure of %data:
2705: # $data{$symb}->{$parameter}=$value;
2706: # $data{$symb}->{'v.'.$parameter}=$version;
2707: # since $parameter will be unescaped, we do not
2708: # have to worry about silly parameter names...
2709:
2710: my $qresult='';
2711: my %data = (); # A hash of anonymous hashes..
2712: while (my ($key,$value) = each(%$hashref)) {
2713: my ($v,$symb,$param) = split(/:/,$key);
2714: next if ($v eq 'version' || $symb eq 'keys');
2715: next if (exists($data{$symb}) &&
2716: exists($data{$symb}->{$param}) &&
2717: $data{$symb}->{'v.'.$param} > $v);
2718: $data{$symb}->{$param}=$value;
2719: $data{$symb}->{'v.'.$param}=$v;
2720: }
2721: if (untie(%$hashref)) {
2722: while (my ($symb,$param_hash) = each(%data)) {
2723: while(my ($param,$value) = each (%$param_hash)){
2724: next if ($param =~ /^v\./); # Ignore versions...
2725: #
2726: # Just dump the symb=value pairs separated by &
2727: #
2728: $qresult.=$symb.':'.$param.'='.$value.'&';
2729: }
2730: }
2731: chop($qresult);
2732: &Reply($client , "$qresult\n", $userinput);
2733: } else {
2734: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2735: "while attempting currentdump\n", $userinput);
2736: }
2737: } else {
2738: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2739: "while attempting currentdump\n", $userinput);
2740: }
2741:
2742: return 1;
2743: }
2744: ®ister_handler("currentdump", \&dump_profile_database, 0, 1, 0);
2745:
2746: #
2747: # Dump a profile database with an optional regular expression
2748: # to match against the keys. In this dump, no effort is made
2749: # to separate symb from version information. Presumably the
2750: # databases that are dumped by this command are of a different
2751: # structure. Need to look at this and improve the documentation of
2752: # both this and the currentdump handler.
2753: # Parameters:
2754: # $cmd - The command keyword.
2755: # $tail - All of the characters after the $cmd:
2756: # These are expected to be a colon
2757: # separated list containing:
2758: # domain/user - identifying the user.
2759: # namespace - identifying the database.
2760: # regexp - optional regular expression
2761: # that is matched against
2762: # database keywords to do
2763: # selective dumps.
2764: # $client - Channel open on the client.
2765: # Returns:
2766: # 1 - Continue processing.
2767: # Side effects:
2768: # response is written to $client.
2769: #
2770: sub dump_with_regexp {
2771: my ($cmd, $tail, $client) = @_;
2772:
2773:
2774: my $userinput = "$cmd:$tail";
2775:
2776: my ($udom,$uname,$namespace,$regexp)=split(/:/,$tail);
2777: if (defined($regexp)) {
2778: $regexp=&unescape($regexp);
2779: } else {
2780: $regexp='.';
2781: }
2782: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2783: &GDBM_READER());
2784: if ($hashref) {
2785: my $qresult='';
2786: while (my ($key,$value) = each(%$hashref)) {
2787: if ($regexp eq '.') {
2788: $qresult.=$key.'='.$value.'&';
2789: } else {
2790: my $unescapeKey = &unescape($key);
2791: if (eval('$unescapeKey=~/$regexp/')) {
2792: $qresult.="$key=$value&";
2793: }
2794: }
2795: }
2796: if (untie(%$hashref)) {
2797: chop($qresult);
2798: &Reply($client, "$qresult\n", $userinput);
2799: } else {
2800: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2801: "while attempting dump\n", $userinput);
2802: }
2803: } else {
2804: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2805: "while attempting dump\n", $userinput);
2806: }
2807:
2808: return 1;
2809: }
2810: ®ister_handler("dump", \&dump_with_regexp, 0, 1, 0);
2811:
2812: # Store a set of key=value pairs associated with a versioned name.
2813: #
2814: # Parameters:
2815: # $cmd - Request command keyword.
2816: # $tail - Tail of the request. This is a colon
2817: # separated list containing:
2818: # domain/user - User and authentication domain.
2819: # namespace - Name of the database being modified
2820: # rid - Resource keyword to modify.
2821: # what - new value associated with rid.
2822: #
2823: # $client - Socket open on the client.
2824: #
2825: #
2826: # Returns:
2827: # 1 (keep on processing).
2828: # Side-Effects:
2829: # Writes to the client
2830: sub store_handler {
2831: my ($cmd, $tail, $client) = @_;
2832:
2833: my $userinput = "$cmd:$tail";
2834:
2835: my ($udom,$uname,$namespace,$rid,$what) =split(/:/,$tail);
2836: if ($namespace ne 'roles') {
2837:
2838: chomp($what);
2839: my @pairs=split(/\&/,$what);
2840: my $hashref = &tie_user_hash($udom, $uname, $namespace,
1.268 albertel 2841: &GDBM_WRCREAT(), "S",
1.231 foxr 2842: "$rid:$what");
2843: if ($hashref) {
2844: my $now = time;
2845: my @previouskeys=split(/&/,$hashref->{"keys:$rid"});
2846: my $key;
2847: $hashref->{"version:$rid"}++;
2848: my $version=$hashref->{"version:$rid"};
2849: my $allkeys='';
2850: foreach my $pair (@pairs) {
2851: my ($key,$value)=split(/=/,$pair);
2852: $allkeys.=$key.':';
2853: $hashref->{"$version:$rid:$key"}=$value;
2854: }
2855: $hashref->{"$version:$rid:timestamp"}=$now;
2856: $allkeys.='timestamp';
2857: $hashref->{"$version:keys:$rid"}=$allkeys;
2858: if (untie($hashref)) {
2859: &Reply($client, "ok\n", $userinput);
2860: } else {
2861: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2862: "while attempting store\n", $userinput);
2863: }
2864: } else {
2865: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2866: "while attempting store\n", $userinput);
2867: }
2868: } else {
2869: &Failure($client, "refused\n", $userinput);
2870: }
2871:
2872: return 1;
2873: }
2874: ®ister_handler("store", \&store_handler, 0, 1, 0);
1.263 albertel 2875:
1.231 foxr 2876: #
2877: # Dump out all versions of a resource that has key=value pairs associated
2878: # with it for each version. These resources are built up via the store
2879: # command.
2880: #
2881: # Parameters:
2882: # $cmd - Command keyword.
2883: # $tail - Remainder of the request which consists of:
2884: # domain/user - User and auth. domain.
2885: # namespace - name of resource database.
2886: # rid - Resource id.
2887: # $client - socket open on the client.
2888: #
2889: # Returns:
2890: # 1 indicating the caller should not yet exit.
2891: # Side-effects:
2892: # Writes a reply to the client.
2893: # The reply is a string of the following shape:
2894: # version=current&version:keys=k1:k2...&1:k1=v1&1:k2=v2...
2895: # Where the 1 above represents version 1.
2896: # this continues for all pairs of keys in all versions.
2897: #
2898: #
2899: #
2900: #
2901: sub restore_handler {
2902: my ($cmd, $tail, $client) = @_;
2903:
2904: my $userinput = "$cmd:$tail"; # Only used for logging purposes.
2905:
2906: my ($cmd,$udom,$uname,$namespace,$rid) = split(/:/,$userinput);
2907: $namespace=~s/\//\_/g;
2908: $namespace=~s/\W//g;
2909: chomp($rid);
2910: my $proname=&propath($udom,$uname);
2911: my $qresult='';
2912: my %hash;
2913: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",
2914: &GDBM_READER(),0640)) {
2915: my $version=$hash{"version:$rid"};
2916: $qresult.="version=$version&";
2917: my $scope;
2918: for ($scope=1;$scope<=$version;$scope++) {
2919: my $vkeys=$hash{"$scope:keys:$rid"};
2920: my @keys=split(/:/,$vkeys);
2921: my $key;
2922: $qresult.="$scope:keys=$vkeys&";
2923: foreach $key (@keys) {
2924: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
2925: }
2926: }
2927: if (untie(%hash)) {
2928: $qresult=~s/\&$//;
2929: &Reply( $client, "$qresult\n", $userinput);
2930: } else {
2931: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2932: "while attempting restore\n", $userinput);
2933: }
2934: } else {
2935: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2936: "while attempting restore\n", $userinput);
2937: }
2938:
2939: return 1;
2940:
2941:
2942: }
2943: ®ister_handler("restore", \&restore_handler, 0,1,0);
1.234 foxr 2944:
2945: #
2946: # Add a chat message to to a discussion board.
2947: #
2948: # Parameters:
2949: # $cmd - Request keyword.
2950: # $tail - Tail of the command. A colon separated list
2951: # containing:
2952: # cdom - Domain on which the chat board lives
2953: # cnum - Identifier of the discussion group.
2954: # post - Body of the posting.
2955: # $client - Socket open on the client.
2956: # Returns:
2957: # 1 - Indicating caller should keep on processing.
2958: #
2959: # Side-effects:
2960: # writes a reply to the client.
2961: #
2962: #
2963: sub send_chat_handler {
2964: my ($cmd, $tail, $client) = @_;
2965:
2966:
2967: my $userinput = "$cmd:$tail";
2968:
2969: my ($cdom,$cnum,$newpost)=split(/\:/,$tail);
2970: &chat_add($cdom,$cnum,$newpost);
2971: &Reply($client, "ok\n", $userinput);
2972:
2973: return 1;
2974: }
2975: ®ister_handler("chatsend", \&send_chat_handler, 0, 1, 0);
1.263 albertel 2976:
1.234 foxr 2977: #
2978: # Retrieve the set of chat messagss from a discussion board.
2979: #
2980: # Parameters:
2981: # $cmd - Command keyword that initiated the request.
2982: # $tail - Remainder of the request after the command
2983: # keyword. In this case a colon separated list of
2984: # chat domain - Which discussion board.
2985: # chat id - Discussion thread(?)
2986: # domain/user - Authentication domain and username
2987: # of the requesting person.
2988: # $client - Socket open on the client program.
2989: # Returns:
2990: # 1 - continue processing
2991: # Side effects:
2992: # Response is written to the client.
2993: #
2994: sub retrieve_chat_handler {
2995: my ($cmd, $tail, $client) = @_;
2996:
2997:
2998: my $userinput = "$cmd:$tail";
2999:
3000: my ($cdom,$cnum,$udom,$uname)=split(/\:/,$tail);
3001: my $reply='';
3002: foreach (&get_chat($cdom,$cnum,$udom,$uname)) {
3003: $reply.=&escape($_).':';
3004: }
3005: $reply=~s/\:$//;
3006: &Reply($client, $reply."\n", $userinput);
3007:
3008:
3009: return 1;
3010: }
3011: ®ister_handler("chatretr", \&retrieve_chat_handler, 0, 1, 0);
3012:
3013: #
3014: # Initiate a query of an sql database. SQL query repsonses get put in
3015: # a file for later retrieval. This prevents sql query results from
3016: # bottlenecking the system. Note that with loncnew, perhaps this is
3017: # less of an issue since multiple outstanding requests can be concurrently
3018: # serviced.
3019: #
3020: # Parameters:
3021: # $cmd - COmmand keyword that initiated the request.
3022: # $tail - Remainder of the command after the keyword.
3023: # For this function, this consists of a query and
3024: # 3 arguments that are self-documentingly labelled
3025: # in the original arg1, arg2, arg3.
3026: # $client - Socket open on the client.
3027: # Return:
3028: # 1 - Indicating processing should continue.
3029: # Side-effects:
3030: # a reply is written to $client.
3031: #
3032: sub send_query_handler {
3033: my ($cmd, $tail, $client) = @_;
3034:
3035:
3036: my $userinput = "$cmd:$tail";
3037:
3038: my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail);
3039: $query=~s/\n*$//g;
3040: &Reply($client, "". &sql_reply("$clientname\&$query".
3041: "\&$arg1"."\&$arg2"."\&$arg3")."\n",
3042: $userinput);
3043:
3044: return 1;
3045: }
3046: ®ister_handler("querysend", \&send_query_handler, 0, 1, 0);
3047:
3048: #
3049: # Add a reply to an sql query. SQL queries are done asyncrhonously.
3050: # The query is submitted via a "querysend" transaction.
3051: # There it is passed on to the lonsql daemon, queued and issued to
3052: # mysql.
3053: # This transaction is invoked when the sql transaction is complete
3054: # it stores the query results in flie and indicates query completion.
3055: # presumably local software then fetches this response... I'm guessing
3056: # the sequence is: lonc does a querysend, we ask lonsql to do it.
3057: # lonsql on completion of the query interacts with the lond of our
3058: # client to do a query reply storing two files:
3059: # - id - The results of the query.
3060: # - id.end - Indicating the transaction completed.
3061: # NOTE: id is a unique id assigned to the query and querysend time.
3062: # Parameters:
3063: # $cmd - Command keyword that initiated this request.
3064: # $tail - Remainder of the tail. In this case that's a colon
3065: # separated list containing the query Id and the
3066: # results of the query.
3067: # $client - Socket open on the client.
3068: # Return:
3069: # 1 - Indicating that we should continue processing.
3070: # Side effects:
3071: # ok written to the client.
3072: #
3073: sub reply_query_handler {
3074: my ($cmd, $tail, $client) = @_;
3075:
3076:
3077: my $userinput = "$cmd:$tail";
3078:
3079: my ($cmd,$id,$reply)=split(/:/,$userinput);
3080: my $store;
3081: my $execdir=$perlvar{'lonDaemons'};
3082: if ($store=IO::File->new(">$execdir/tmp/$id")) {
3083: $reply=~s/\&/\n/g;
3084: print $store $reply;
3085: close $store;
3086: my $store2=IO::File->new(">$execdir/tmp/$id.end");
3087: print $store2 "done\n";
3088: close $store2;
3089: &Reply($client, "ok\n", $userinput);
3090: } else {
3091: &Failure($client, "error: ".($!+0)
3092: ." IO::File->new Failed ".
3093: "while attempting queryreply\n", $userinput);
3094: }
3095:
3096:
3097: return 1;
3098: }
3099: ®ister_handler("queryreply", \&reply_query_handler, 0, 1, 0);
3100:
3101: #
3102: # Process the courseidput request. Not quite sure what this means
3103: # at the system level sense. It appears a gdbm file in the
3104: # /home/httpd/lonUsers/$domain/nohist_courseids is tied and
3105: # a set of entries made in that database.
3106: #
3107: # Parameters:
3108: # $cmd - The command keyword that initiated this request.
3109: # $tail - Tail of the command. In this case consists of a colon
3110: # separated list contaning the domain to apply this to and
3111: # an ampersand separated list of keyword=value pairs.
1.272 raeburn 3112: # Each value is a colon separated list that includes:
3113: # description, institutional code and course owner.
3114: # For backward compatibility with versions included
3115: # in LON-CAPA 1.1.X (and earlier) and 1.2.X, institutional
3116: # code and/or course owner are preserved from the existing
3117: # record when writing a new record in response to 1.1 or
3118: # 1.2 implementations of lonnet::flushcourselogs().
3119: #
1.234 foxr 3120: # $client - Socket open on the client.
3121: # Returns:
3122: # 1 - indicating that processing should continue
3123: #
3124: # Side effects:
3125: # reply is written to the client.
3126: #
3127: sub put_course_id_handler {
3128: my ($cmd, $tail, $client) = @_;
3129:
3130:
3131: my $userinput = "$cmd:$tail";
3132:
1.266 raeburn 3133: my ($udom, $what) = split(/:/, $tail,2);
1.234 foxr 3134: chomp($what);
3135: my $now=time;
3136: my @pairs=split(/\&/,$what);
3137:
3138: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3139: if ($hashref) {
3140: foreach my $pair (@pairs) {
1.271 raeburn 3141: my ($key,$courseinfo) = split(/=/,$pair,2);
3142: $courseinfo =~ s/=/:/g;
1.272 raeburn 3143:
1.273 albertel 3144: my @current_items = split(/:/,$hashref->{$key});
3145: shift(@current_items); # remove description
3146: pop(@current_items); # remove last access
1.272 raeburn 3147: my $numcurrent = scalar(@current_items);
3148:
1.273 albertel 3149: my @new_items = split(/:/,$courseinfo);
1.272 raeburn 3150: my $numnew = scalar(@new_items);
3151: if ($numcurrent > 0) {
3152: if ($numnew == 1) { # flushcourselogs() from 1.1 or earlier
3153: $courseinfo .= ':'.join(':',@current_items);
3154: } elsif ($numnew == 2) { # flushcourselogs() from 1.2.X
3155: $courseinfo .= ':'.$current_items[$numcurrent-1];
3156: }
3157: }
1.266 raeburn 3158: $hashref->{$key}=$courseinfo.':'.$now;
1.234 foxr 3159: }
3160: if (untie(%$hashref)) {
1.253 foxr 3161: &Reply( $client, "ok\n", $userinput);
1.234 foxr 3162: } else {
1.253 foxr 3163: &Failure($client, "error: ".($!+0)
1.234 foxr 3164: ." untie(GDBM) Failed ".
3165: "while attempting courseidput\n", $userinput);
3166: }
3167: } else {
1.253 foxr 3168: &Failure($client, "error: ".($!+0)
1.234 foxr 3169: ." tie(GDBM) Failed ".
3170: "while attempting courseidput\n", $userinput);
3171: }
1.253 foxr 3172:
1.234 foxr 3173:
3174: return 1;
3175: }
3176: ®ister_handler("courseidput", \&put_course_id_handler, 0, 1, 0);
3177:
3178: # Retrieves the value of a course id resource keyword pattern
3179: # defined since a starting date. Both the starting date and the
3180: # keyword pattern are optional. If the starting date is not supplied it
3181: # is treated as the beginning of time. If the pattern is not found,
3182: # it is treatred as "." matching everything.
3183: #
3184: # Parameters:
3185: # $cmd - Command keyword that resulted in us being dispatched.
3186: # $tail - The remainder of the command that, in this case, consists
3187: # of a colon separated list of:
3188: # domain - The domain in which the course database is
3189: # defined.
3190: # since - Optional parameter describing the minimum
3191: # time of definition(?) of the resources that
3192: # will match the dump.
3193: # description - regular expression that is used to filter
3194: # the dump. Only keywords matching this regexp
3195: # will be used.
1.272 raeburn 3196: # institutional code - optional supplied code to filter
3197: # the dump. Only courses with an institutional code
3198: # that match the supplied code will be returned.
3199: # owner - optional supplied username of owner to filter
3200: # the dump. Only courses for which the course
3201: # owner matches the supplied username will be
1.274 albertel 3202: # returned. Implicit assumption that owner
3203: # is a user in the domain in which the
3204: # course database is defined.
1.234 foxr 3205: # $client - The socket open on the client.
3206: # Returns:
3207: # 1 - Continue processing.
3208: # Side Effects:
3209: # a reply is written to $client.
3210: sub dump_course_id_handler {
3211: my ($cmd, $tail, $client) = @_;
3212:
3213: my $userinput = "$cmd:$tail";
3214:
1.266 raeburn 3215: my ($udom,$since,$description,$instcodefilter,$ownerfilter) =split(/:/,$tail);
1.234 foxr 3216: if (defined($description)) {
3217: $description=&unescape($description);
3218: } else {
3219: $description='.';
3220: }
1.266 raeburn 3221: if (defined($instcodefilter)) {
3222: $instcodefilter=&unescape($instcodefilter);
3223: } else {
3224: $instcodefilter='.';
3225: }
3226: if (defined($ownerfilter)) {
3227: $ownerfilter=&unescape($ownerfilter);
3228: } else {
3229: $ownerfilter='.';
3230: }
3231:
1.234 foxr 3232: unless (defined($since)) { $since=0; }
3233: my $qresult='';
3234: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3235: if ($hashref) {
3236: while (my ($key,$value) = each(%$hashref)) {
1.266 raeburn 3237: my ($descr,$lasttime,$inst_code,$owner);
1.274 albertel 3238: my @courseitems = split(/:/,$value);
3239: $lasttime = pop(@courseitems);
3240: ($descr,$inst_code,$owner)=@courseitems;
1.234 foxr 3241: if ($lasttime<$since) { next; }
1.266 raeburn 3242: my $match = 1;
3243: unless ($description eq '.') {
3244: my $unescapeDescr = &unescape($descr);
3245: unless (eval('$unescapeDescr=~/\Q$description\E/i')) {
3246: $match = 0;
1.234 foxr 3247: }
1.266 raeburn 3248: }
3249: unless ($instcodefilter eq '.' || !defined($instcodefilter)) {
3250: my $unescapeInstcode = &unescape($inst_code);
3251: unless (eval('$unescapeInstcode=~/\Q$instcodefilter\E/i')) {
3252: $match = 0;
3253: }
1.234 foxr 3254: }
1.266 raeburn 3255: unless ($ownerfilter eq '.' || !defined($ownerfilter)) {
3256: my $unescapeOwner = &unescape($owner);
3257: unless (eval('$unescapeOwner=~/\Q$ownerfilter\E/i')) {
3258: $match = 0;
3259: }
3260: }
3261: if ($match == 1) {
3262: $qresult.=$key.'='.$descr.':'.$inst_code.':'.$owner.'&';
3263: }
1.234 foxr 3264: }
3265: if (untie(%$hashref)) {
3266: chop($qresult);
3267: &Reply($client, "$qresult\n", $userinput);
3268: } else {
3269: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3270: "while attempting courseiddump\n", $userinput);
3271: }
3272: } else {
3273: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3274: "while attempting courseiddump\n", $userinput);
3275: }
3276:
3277:
3278: return 1;
3279: }
3280: ®ister_handler("courseiddump", \&dump_course_id_handler, 0, 1, 0);
1.238 foxr 3281:
3282: #
3283: # Puts an id to a domains id database.
3284: #
3285: # Parameters:
3286: # $cmd - The command that triggered us.
3287: # $tail - Remainder of the request other than the command. This is a
3288: # colon separated list containing:
3289: # $domain - The domain for which we are writing the id.
3290: # $pairs - The id info to write... this is and & separated list
3291: # of keyword=value.
3292: # $client - Socket open on the client.
3293: # Returns:
3294: # 1 - Continue processing.
3295: # Side effects:
3296: # reply is written to $client.
3297: #
3298: sub put_id_handler {
3299: my ($cmd,$tail,$client) = @_;
3300:
3301:
3302: my $userinput = "$cmd:$tail";
3303:
3304: my ($udom,$what)=split(/:/,$tail);
3305: chomp($what);
3306: my @pairs=split(/\&/,$what);
3307: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
3308: "P", $what);
3309: if ($hashref) {
3310: foreach my $pair (@pairs) {
3311: my ($key,$value)=split(/=/,$pair);
3312: $hashref->{$key}=$value;
3313: }
3314: if (untie(%$hashref)) {
3315: &Reply($client, "ok\n", $userinput);
3316: } else {
3317: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3318: "while attempting idput\n", $userinput);
3319: }
3320: } else {
3321: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3322: "while attempting idput\n", $userinput);
3323: }
3324:
3325: return 1;
3326: }
1.263 albertel 3327: ®ister_handler("idput", \&put_id_handler, 0, 1, 0);
1.238 foxr 3328:
3329: #
3330: # Retrieves a set of id values from the id database.
3331: # Returns an & separated list of results, one for each requested id to the
3332: # client.
3333: #
3334: # Parameters:
3335: # $cmd - Command keyword that caused us to be dispatched.
3336: # $tail - Tail of the command. Consists of a colon separated:
3337: # domain - the domain whose id table we dump
3338: # ids Consists of an & separated list of
3339: # id keywords whose values will be fetched.
3340: # nonexisting keywords will have an empty value.
3341: # $client - Socket open on the client.
3342: #
3343: # Returns:
3344: # 1 - indicating processing should continue.
3345: # Side effects:
3346: # An & separated list of results is written to $client.
3347: #
3348: sub get_id_handler {
3349: my ($cmd, $tail, $client) = @_;
3350:
3351:
3352: my $userinput = "$client:$tail";
3353:
3354: my ($udom,$what)=split(/:/,$tail);
3355: chomp($what);
3356: my @queries=split(/\&/,$what);
3357: my $qresult='';
3358: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_READER());
3359: if ($hashref) {
3360: for (my $i=0;$i<=$#queries;$i++) {
3361: $qresult.="$hashref->{$queries[$i]}&";
3362: }
3363: if (untie(%$hashref)) {
3364: $qresult=~s/\&$//;
3365: &Reply($client, "$qresult\n", $userinput);
3366: } else {
3367: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3368: "while attempting idget\n",$userinput);
3369: }
3370: } else {
3371: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3372: "while attempting idget\n",$userinput);
3373: }
3374:
3375: return 1;
3376: }
1.263 albertel 3377: ®ister_handler("idget", \&get_id_handler, 0, 1, 0);
1.238 foxr 3378:
3379: #
3380: # Process the tmpput command I'm not sure what this does.. Seems to
3381: # create a file in the lonDaemons/tmp directory of the form $id.tmp
3382: # where Id is the client's ip concatenated with a sequence number.
3383: # The file will contain some value that is passed in. Is this e.g.
3384: # a login token?
3385: #
3386: # Parameters:
3387: # $cmd - The command that got us dispatched.
3388: # $tail - The remainder of the request following $cmd:
3389: # In this case this will be the contents of the file.
3390: # $client - Socket connected to the client.
3391: # Returns:
3392: # 1 indicating processing can continue.
3393: # Side effects:
3394: # A file is created in the local filesystem.
3395: # A reply is sent to the client.
3396: sub tmp_put_handler {
3397: my ($cmd, $what, $client) = @_;
3398:
3399: my $userinput = "$cmd:$what"; # Reconstruct for logging.
3400:
3401:
3402: my $store;
3403: $tmpsnum++;
3404: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
3405: $id=~s/\W/\_/g;
3406: $what=~s/\n//g;
3407: my $execdir=$perlvar{'lonDaemons'};
3408: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
3409: print $store $what;
3410: close $store;
3411: &Reply($client, "$id\n", $userinput);
3412: } else {
3413: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
3414: "while attempting tmpput\n", $userinput);
3415: }
3416: return 1;
3417:
3418: }
3419: ®ister_handler("tmpput", \&tmp_put_handler, 0, 1, 0);
1.263 albertel 3420:
1.238 foxr 3421: # Processes the tmpget command. This command returns the contents
3422: # of a temporary resource file(?) created via tmpput.
3423: #
3424: # Paramters:
3425: # $cmd - Command that got us dispatched.
3426: # $id - Tail of the command, contain the id of the resource
3427: # we want to fetch.
3428: # $client - socket open on the client.
3429: # Return:
3430: # 1 - Inidcating processing can continue.
3431: # Side effects:
3432: # A reply is sent to the client.
3433: #
3434: sub tmp_get_handler {
3435: my ($cmd, $id, $client) = @_;
3436:
3437: my $userinput = "$cmd:$id";
3438:
3439:
3440: $id=~s/\W/\_/g;
3441: my $store;
3442: my $execdir=$perlvar{'lonDaemons'};
3443: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
3444: my $reply=<$store>;
3445: &Reply( $client, "$reply\n", $userinput);
3446: close $store;
3447: } else {
3448: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
3449: "while attempting tmpget\n", $userinput);
3450: }
3451:
3452: return 1;
3453: }
3454: ®ister_handler("tmpget", \&tmp_get_handler, 0, 1, 0);
1.263 albertel 3455:
1.238 foxr 3456: #
3457: # Process the tmpdel command. This command deletes a temp resource
3458: # created by the tmpput command.
3459: #
3460: # Parameters:
3461: # $cmd - Command that got us here.
3462: # $id - Id of the temporary resource created.
3463: # $client - socket open on the client process.
3464: #
3465: # Returns:
3466: # 1 - Indicating processing should continue.
3467: # Side Effects:
3468: # A file is deleted
3469: # A reply is sent to the client.
3470: sub tmp_del_handler {
3471: my ($cmd, $id, $client) = @_;
3472:
3473: my $userinput= "$cmd:$id";
3474:
3475: chomp($id);
3476: $id=~s/\W/\_/g;
3477: my $execdir=$perlvar{'lonDaemons'};
3478: if (unlink("$execdir/tmp/$id.tmp")) {
3479: &Reply($client, "ok\n", $userinput);
3480: } else {
3481: &Failure( $client, "error: ".($!+0)."Unlink tmp Failed ".
3482: "while attempting tmpdel\n", $userinput);
3483: }
3484:
3485: return 1;
3486:
3487: }
3488: ®ister_handler("tmpdel", \&tmp_del_handler, 0, 1, 0);
1.263 albertel 3489:
1.238 foxr 3490: #
1.246 foxr 3491: # Processes the setannounce command. This command
3492: # creates a file named announce.txt in the top directory of
3493: # the documentn root and sets its contents. The announce.txt file is
3494: # printed in its entirety at the LonCAPA login page. Note:
3495: # once the announcement.txt fileis created it cannot be deleted.
3496: # However, setting the contents of the file to empty removes the
3497: # announcement from the login page of loncapa so who cares.
3498: #
3499: # Parameters:
3500: # $cmd - The command that got us dispatched.
3501: # $announcement - The text of the announcement.
3502: # $client - Socket open on the client process.
3503: # Retunrns:
3504: # 1 - Indicating request processing should continue
3505: # Side Effects:
3506: # The file {DocRoot}/announcement.txt is created.
3507: # A reply is sent to $client.
3508: #
3509: sub set_announce_handler {
3510: my ($cmd, $announcement, $client) = @_;
3511:
3512: my $userinput = "$cmd:$announcement";
3513:
3514: chomp($announcement);
3515: $announcement=&unescape($announcement);
3516: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
3517: '/announcement.txt')) {
3518: print $store $announcement;
3519: close $store;
3520: &Reply($client, "ok\n", $userinput);
3521: } else {
3522: &Failure($client, "error: ".($!+0)."\n", $userinput);
3523: }
3524:
3525: return 1;
3526: }
3527: ®ister_handler("setannounce", \&set_announce_handler, 0, 1, 0);
1.263 albertel 3528:
1.246 foxr 3529: #
3530: # Return the version of the daemon. This can be used to determine
3531: # the compatibility of cross version installations or, alternatively to
3532: # simply know who's out of date and who isn't. Note that the version
3533: # is returned concatenated with the tail.
3534: # Parameters:
3535: # $cmd - the request that dispatched to us.
3536: # $tail - Tail of the request (client's version?).
3537: # $client - Socket open on the client.
3538: #Returns:
3539: # 1 - continue processing requests.
3540: # Side Effects:
3541: # Replies with version to $client.
3542: sub get_version_handler {
3543: my ($cmd, $tail, $client) = @_;
3544:
3545: my $userinput = $cmd.$tail;
3546:
3547: &Reply($client, &version($userinput)."\n", $userinput);
3548:
3549:
3550: return 1;
3551: }
3552: ®ister_handler("version", \&get_version_handler, 0, 1, 0);
1.263 albertel 3553:
1.246 foxr 3554: # Set the current host and domain. This is used to support
3555: # multihomed systems. Each IP of the system, or even separate daemons
3556: # on the same IP can be treated as handling a separate lonCAPA virtual
3557: # machine. This command selects the virtual lonCAPA. The client always
3558: # knows the right one since it is lonc and it is selecting the domain/system
3559: # from the hosts.tab file.
3560: # Parameters:
3561: # $cmd - Command that dispatched us.
3562: # $tail - Tail of the command (domain/host requested).
3563: # $socket - Socket open on the client.
3564: #
3565: # Returns:
3566: # 1 - Indicates the program should continue to process requests.
3567: # Side-effects:
3568: # The default domain/system context is modified for this daemon.
3569: # a reply is sent to the client.
3570: #
3571: sub set_virtual_host_handler {
3572: my ($cmd, $tail, $socket) = @_;
3573:
3574: my $userinput ="$cmd:$tail";
3575:
3576: &Reply($client, &sethost($userinput)."\n", $userinput);
3577:
3578:
3579: return 1;
3580: }
1.247 albertel 3581: ®ister_handler("sethost", \&set_virtual_host_handler, 0, 1, 0);
1.246 foxr 3582:
3583: # Process a request to exit:
3584: # - "bye" is sent to the client.
3585: # - The client socket is shutdown and closed.
3586: # - We indicate to the caller that we should exit.
3587: # Formal Parameters:
3588: # $cmd - The command that got us here.
3589: # $tail - Tail of the command (empty).
3590: # $client - Socket open on the tail.
3591: # Returns:
3592: # 0 - Indicating the program should exit!!
3593: #
3594: sub exit_handler {
3595: my ($cmd, $tail, $client) = @_;
3596:
3597: my $userinput = "$cmd:$tail";
3598:
3599: &logthis("Client $clientip ($clientname) hanging up: $userinput");
3600: &Reply($client, "bye\n", $userinput);
3601: $client->shutdown(2); # shutdown the socket forcibly.
3602: $client->close();
3603:
3604: return 0;
3605: }
1.248 foxr 3606: ®ister_handler("exit", \&exit_handler, 0,1,1);
3607: ®ister_handler("init", \&exit_handler, 0,1,1);
3608: ®ister_handler("quit", \&exit_handler, 0,1,1);
3609:
3610: # Determine if auto-enrollment is enabled.
3611: # Note that the original had what I believe to be a defect.
3612: # The original returned 0 if the requestor was not a registerd client.
3613: # It should return "refused".
3614: # Formal Parameters:
3615: # $cmd - The command that invoked us.
3616: # $tail - The tail of the command (Extra command parameters.
3617: # $client - The socket open on the client that issued the request.
3618: # Returns:
3619: # 1 - Indicating processing should continue.
3620: #
3621: sub enrollment_enabled_handler {
3622: my ($cmd, $tail, $client) = @_;
3623: my $userinput = $cmd.":".$tail; # For logging purposes.
3624:
3625:
3626: my $cdom = split(/:/, $tail); # Domain we're asking about.
3627: my $outcome = &localenroll::run($cdom);
3628: &Reply($client, "$outcome\n", $userinput);
3629:
3630: return 1;
3631: }
3632: ®ister_handler("autorun", \&enrollment_enabled_handler, 0, 1, 0);
3633:
3634: # Get the official sections for which auto-enrollment is possible.
3635: # Since the admin people won't know about 'unofficial sections'
3636: # we cannot auto-enroll on them.
3637: # Formal Parameters:
3638: # $cmd - The command request that got us dispatched here.
3639: # $tail - The remainder of the request. In our case this
3640: # will be split into:
3641: # $coursecode - The course name from the admin point of view.
3642: # $cdom - The course's domain(?).
3643: # $client - Socket open on the client.
3644: # Returns:
3645: # 1 - Indiciting processing should continue.
3646: #
3647: sub get_sections_handler {
3648: my ($cmd, $tail, $client) = @_;
3649: my $userinput = "$cmd:$tail";
3650:
3651: my ($coursecode, $cdom) = split(/:/, $tail);
3652: my @secs = &localenroll::get_sections($coursecode,$cdom);
3653: my $seclist = &escape(join(':',@secs));
3654:
3655: &Reply($client, "$seclist\n", $userinput);
3656:
3657:
3658: return 1;
3659: }
3660: ®ister_handler("autogetsections", \&get_sections_handler, 0, 1, 0);
3661:
3662: # Validate the owner of a new course section.
3663: #
3664: # Formal Parameters:
3665: # $cmd - Command that got us dispatched.
3666: # $tail - the remainder of the command. For us this consists of a
3667: # colon separated string containing:
3668: # $inst - Course Id from the institutions point of view.
3669: # $owner - Proposed owner of the course.
3670: # $cdom - Domain of the course (from the institutions
3671: # point of view?)..
3672: # $client - Socket open on the client.
3673: #
3674: # Returns:
3675: # 1 - Processing should continue.
3676: #
3677: sub validate_course_owner_handler {
3678: my ($cmd, $tail, $client) = @_;
3679: my $userinput = "$cmd:$tail";
3680: my ($inst_course_id, $owner, $cdom) = split(/:/, $tail);
3681:
3682: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom);
3683: &Reply($client, "$outcome\n", $userinput);
3684:
3685:
3686:
3687: return 1;
3688: }
3689: ®ister_handler("autonewcourse", \&validate_course_owner_handler, 0, 1, 0);
1.263 albertel 3690:
1.248 foxr 3691: #
3692: # Validate a course section in the official schedule of classes
3693: # from the institutions point of view (part of autoenrollment).
3694: #
3695: # Formal Parameters:
3696: # $cmd - The command request that got us dispatched.
3697: # $tail - The tail of the command. In this case,
3698: # this is a colon separated set of words that will be split
3699: # into:
3700: # $inst_course_id - The course/section id from the
3701: # institutions point of view.
3702: # $cdom - The domain from the institutions
3703: # point of view.
3704: # $client - Socket open on the client.
3705: # Returns:
3706: # 1 - Indicating processing should continue.
3707: #
3708: sub validate_course_section_handler {
3709: my ($cmd, $tail, $client) = @_;
3710: my $userinput = "$cmd:$tail";
3711: my ($inst_course_id, $cdom) = split(/:/, $tail);
3712:
3713: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
3714: &Reply($client, "$outcome\n", $userinput);
3715:
3716:
3717: return 1;
3718: }
3719: ®ister_handler("autovalidatecourse", \&validate_course_section_handler, 0, 1, 0);
3720:
3721: #
3722: # Create a password for a new auto-enrollment user.
3723: # I think/guess, this password allows access to the institutions
3724: # AIS class list server/services. Stuart can correct this comment
3725: # when he finds out how wrong I am.
3726: #
3727: # Formal Parameters:
3728: # $cmd - The command request that got us dispatched.
3729: # $tail - The tail of the command. In this case this is a colon separated
3730: # set of words that will be split into:
3731: # $authparam - An authentication parameter (username??).
3732: # $cdom - The domain of the course from the institution's
3733: # point of view.
3734: # $client - The socket open on the client.
3735: # Returns:
3736: # 1 - continue processing.
3737: #
3738: sub create_auto_enroll_password_handler {
3739: my ($cmd, $tail, $client) = @_;
3740: my $userinput = "$cmd:$tail";
3741:
3742: my ($authparam, $cdom) = split(/:/, $userinput);
3743:
3744: my ($create_passwd,$authchk);
3745: ($authparam,
3746: $create_passwd,
3747: $authchk) = &localenroll::create_password($authparam,$cdom);
3748:
3749: &Reply($client, &escape($authparam.':'.$create_passwd.':'.$authchk)."\n",
3750: $userinput);
3751:
3752:
3753: return 1;
3754: }
3755: ®ister_handler("autocreatepassword", \&create_auto_enroll_password_handler,
3756: 0, 1, 0);
3757:
3758: # Retrieve and remove temporary files created by/during autoenrollment.
3759: #
3760: # Formal Parameters:
3761: # $cmd - The command that got us dispatched.
3762: # $tail - The tail of the command. In our case this is a colon
3763: # separated list that will be split into:
3764: # $filename - The name of the file to remove.
3765: # The filename is given as a path relative to
3766: # the LonCAPA temp file directory.
3767: # $client - Socket open on the client.
3768: #
3769: # Returns:
3770: # 1 - Continue processing.
3771: sub retrieve_auto_file_handler {
3772: my ($cmd, $tail, $client) = @_;
3773: my $userinput = "cmd:$tail";
3774:
3775: my ($filename) = split(/:/, $tail);
3776:
3777: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
3778: if ( (-e $source) && ($filename ne '') ) {
3779: my $reply = '';
3780: if (open(my $fh,$source)) {
3781: while (<$fh>) {
3782: chomp($_);
3783: $_ =~ s/^\s+//g;
3784: $_ =~ s/\s+$//g;
3785: $reply .= $_;
3786: }
3787: close($fh);
3788: &Reply($client, &escape($reply)."\n", $userinput);
3789:
3790: # Does this have to be uncommented??!? (RF).
3791: #
3792: # unlink($source);
3793: } else {
3794: &Failure($client, "error\n", $userinput);
3795: }
3796: } else {
3797: &Failure($client, "error\n", $userinput);
3798: }
3799:
3800:
3801: return 1;
3802: }
3803: ®ister_handler("autoretrieve", \&retrieve_auto_file_handler, 0,1,0);
3804:
3805: #
3806: # Read and retrieve institutional code format (for support form).
3807: # Formal Parameters:
3808: # $cmd - Command that dispatched us.
3809: # $tail - Tail of the command. In this case it conatins
3810: # the course domain and the coursename.
3811: # $client - Socket open on the client.
3812: # Returns:
3813: # 1 - Continue processing.
3814: #
3815: sub get_institutional_code_format_handler {
3816: my ($cmd, $tail, $client) = @_;
3817: my $userinput = "$cmd:$tail";
3818:
3819: my $reply;
3820: my($cdom,$course) = split(/:/,$tail);
3821: my @pairs = split/\&/,$course;
3822: my %instcodes = ();
3823: my %codes = ();
3824: my @codetitles = ();
3825: my %cat_titles = ();
3826: my %cat_order = ();
3827: foreach (@pairs) {
3828: my ($key,$value) = split/=/,$_;
3829: $instcodes{&unescape($key)} = &unescape($value);
3830: }
3831: my $formatreply = &localenroll::instcode_format($cdom,
3832: \%instcodes,
3833: \%codes,
3834: \@codetitles,
3835: \%cat_titles,
3836: \%cat_order);
3837: if ($formatreply eq 'ok') {
3838: my $codes_str = &hash2str(%codes);
3839: my $codetitles_str = &array2str(@codetitles);
3840: my $cat_titles_str = &hash2str(%cat_titles);
3841: my $cat_order_str = &hash2str(%cat_order);
3842: &Reply($client,
3843: $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'
3844: .$cat_order_str."\n",
3845: $userinput);
3846: } else {
3847: # this else branch added by RF since if not ok, lonc will
3848: # hang waiting on reply until timeout.
3849: #
3850: &Reply($client, "format_error\n", $userinput);
3851: }
3852:
3853: return 1;
3854: }
1.265 albertel 3855: ®ister_handler("autoinstcodeformat",
3856: \&get_institutional_code_format_handler,0,1,0);
1.246 foxr 3857:
1.265 albertel 3858: #
3859: # Gets a student's photo to exist (in the correct image type) in the user's
3860: # directory.
3861: # Formal Parameters:
3862: # $cmd - The command request that got us dispatched.
3863: # $tail - A colon separated set of words that will be split into:
3864: # $domain - student's domain
3865: # $uname - student username
3866: # $type - image type desired
3867: # $client - The socket open on the client.
3868: # Returns:
3869: # 1 - continue processing.
3870: sub student_photo_handler {
3871: my ($cmd, $tail, $client) = @_;
3872: my ($domain,$uname,$type) = split(/:/, $tail);
3873:
3874: my $path=&propath($domain,$uname).
3875: '/userfiles/internal/studentphoto.'.$type;
3876: if (-e $path) {
3877: &Reply($client,"ok\n","$cmd:$tail");
3878: return 1;
3879: }
3880: &mkpath($path);
3881: my $file=&localstudentphoto::fetch($domain,$uname);
3882: if (!$file) {
3883: &Failure($client,"unavailable\n","$cmd:$tail");
3884: return 1;
3885: }
3886: if (!-e $path) { &convert_photo($file,$path); }
3887: if (-e $path) {
3888: &Reply($client,"ok\n","$cmd:$tail");
3889: return 1;
3890: }
3891: &Failure($client,"unable_to_convert\n","$cmd:$tail");
3892: return 1;
3893: }
3894: ®ister_handler("studentphoto", \&student_photo_handler, 0, 1, 0);
1.246 foxr 3895:
1.264 albertel 3896: # mkpath makes all directories for a file, expects an absolute path with a
3897: # file or a trailing / if just a dir is passed
3898: # returns 1 on success 0 on failure
3899: sub mkpath {
3900: my ($file)=@_;
3901: my @parts=split(/\//,$file,-1);
3902: my $now=$parts[0].'/'.$parts[1].'/'.$parts[2];
3903: for (my $i=3;$i<= ($#parts-1);$i++) {
1.265 albertel 3904: $now.='/'.$parts[$i];
1.264 albertel 3905: if (!-e $now) {
3906: if (!mkdir($now,0770)) { return 0; }
3907: }
3908: }
3909: return 1;
3910: }
3911:
1.207 foxr 3912: #---------------------------------------------------------------
3913: #
3914: # Getting, decoding and dispatching requests:
3915: #
3916: #
3917: # Get a Request:
3918: # Gets a Request message from the client. The transaction
3919: # is defined as a 'line' of text. We remove the new line
3920: # from the text line.
1.226 foxr 3921: #
1.211 albertel 3922: sub get_request {
1.207 foxr 3923: my $input = <$client>;
3924: chomp($input);
1.226 foxr 3925:
1.234 foxr 3926: &Debug("get_request: Request = $input\n");
1.207 foxr 3927:
3928: &status('Processing '.$clientname.':'.$input);
3929:
3930: return $input;
3931: }
1.212 foxr 3932: #---------------------------------------------------------------
3933: #
3934: # Process a request. This sub should shrink as each action
3935: # gets farmed out into a separat sub that is registered
3936: # with the dispatch hash.
3937: #
3938: # Parameters:
3939: # user_input - The request received from the client (lonc).
3940: # Returns:
3941: # true to keep processing, false if caller should exit.
3942: #
3943: sub process_request {
3944: my ($userinput) = @_; # Easier for now to break style than to
3945: # fix all the userinput -> user_input.
3946: my $wasenc = 0; # True if request was encrypted.
3947: # ------------------------------------------------------------ See if encrypted
3948: if ($userinput =~ /^enc/) {
3949: $userinput = decipher($userinput);
3950: $wasenc=1;
3951: if(!$userinput) { # Cipher not defined.
1.251 foxr 3952: &Failure($client, "error: Encrypted data without negotated key\n");
1.212 foxr 3953: return 0;
3954: }
3955: }
3956: Debug("process_request: $userinput\n");
3957:
1.213 foxr 3958: #
3959: # The 'correct way' to add a command to lond is now to
3960: # write a sub to execute it and Add it to the command dispatch
3961: # hash via a call to register_handler.. The comments to that
3962: # sub should give you enough to go on to show how to do this
3963: # along with the examples that are building up as this code
3964: # is getting refactored. Until all branches of the
3965: # if/elseif monster below have been factored out into
3966: # separate procesor subs, if the dispatch hash is missing
3967: # the command keyword, we will fall through to the remainder
3968: # of the if/else chain below in order to keep this thing in
3969: # working order throughout the transmogrification.
3970:
3971: my ($command, $tail) = split(/:/, $userinput, 2);
3972: chomp($command);
3973: chomp($tail);
3974: $tail =~ s/(\r)//; # This helps people debugging with e.g. telnet.
1.214 foxr 3975: $command =~ s/(\r)//; # And this too for parameterless commands.
3976: if(!$tail) {
3977: $tail =""; # defined but blank.
3978: }
1.213 foxr 3979:
3980: &Debug("Command received: $command, encoded = $wasenc");
3981:
3982: if(defined $Dispatcher{$command}) {
3983:
3984: my $dispatch_info = $Dispatcher{$command};
3985: my $handler = $$dispatch_info[0];
3986: my $need_encode = $$dispatch_info[1];
3987: my $client_types = $$dispatch_info[2];
3988: Debug("Matched dispatch hash: mustencode: $need_encode "
3989: ."ClientType $client_types");
3990:
3991: # Validate the request:
3992:
3993: my $ok = 1;
3994: my $requesterprivs = 0;
3995: if(&isClient()) {
3996: $requesterprivs |= $CLIENT_OK;
3997: }
3998: if(&isManager()) {
3999: $requesterprivs |= $MANAGER_OK;
4000: }
4001: if($need_encode && (!$wasenc)) {
4002: Debug("Must encode but wasn't: $need_encode $wasenc");
4003: $ok = 0;
4004: }
4005: if(($client_types & $requesterprivs) == 0) {
4006: Debug("Client not privileged to do this operation");
4007: $ok = 0;
4008: }
4009:
4010: if($ok) {
4011: Debug("Dispatching to handler $command $tail");
4012: my $keep_going = &$handler($command, $tail, $client);
4013: return $keep_going;
4014: } else {
4015: Debug("Refusing to dispatch because client did not match requirements");
4016: Failure($client, "refused\n", $userinput);
4017: return 1;
4018: }
4019:
4020: }
4021:
1.262 foxr 4022: print $client "unknown_cmd\n";
1.212 foxr 4023: # -------------------------------------------------------------------- complete
4024: Debug("process_request - returning 1");
4025: return 1;
4026: }
1.207 foxr 4027: #
4028: # Decipher encoded traffic
4029: # Parameters:
4030: # input - Encoded data.
4031: # Returns:
4032: # Decoded data or undef if encryption key was not yet negotiated.
4033: # Implicit input:
4034: # cipher - This global holds the negotiated encryption key.
4035: #
1.211 albertel 4036: sub decipher {
1.207 foxr 4037: my ($input) = @_;
4038: my $output = '';
1.212 foxr 4039:
4040:
1.207 foxr 4041: if($cipher) {
4042: my($enc, $enclength, $encinput) = split(/:/, $input);
4043: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
4044: $output .=
4045: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
4046: }
4047: return substr($output, 0, $enclength);
4048: } else {
4049: return undef;
4050: }
4051: }
4052:
4053: #
4054: # Register a command processor. This function is invoked to register a sub
4055: # to process a request. Once registered, the ProcessRequest sub can automatically
4056: # dispatch requests to an appropriate sub, and do the top level validity checking
4057: # as well:
4058: # - Is the keyword recognized.
4059: # - Is the proper client type attempting the request.
4060: # - Is the request encrypted if it has to be.
4061: # Parameters:
4062: # $request_name - Name of the request being registered.
4063: # This is the command request that will match
4064: # against the hash keywords to lookup the information
4065: # associated with the dispatch information.
4066: # $procedure - Reference to a sub to call to process the request.
4067: # All subs get called as follows:
4068: # Procedure($cmd, $tail, $replyfd, $key)
4069: # $cmd - the actual keyword that invoked us.
4070: # $tail - the tail of the request that invoked us.
4071: # $replyfd- File descriptor connected to the client
4072: # $must_encode - True if the request must be encoded to be good.
4073: # $client_ok - True if it's ok for a client to request this.
4074: # $manager_ok - True if it's ok for a manager to request this.
4075: # Side effects:
4076: # - On success, the Dispatcher hash has an entry added for the key $RequestName
4077: # - On failure, the program will die as it's a bad internal bug to try to
4078: # register a duplicate command handler.
4079: #
1.211 albertel 4080: sub register_handler {
1.212 foxr 4081: my ($request_name,$procedure,$must_encode, $client_ok,$manager_ok) = @_;
1.207 foxr 4082:
4083: # Don't allow duplication#
4084:
4085: if (defined $Dispatcher{$request_name}) {
4086: die "Attempting to define a duplicate request handler for $request_name\n";
4087: }
4088: # Build the client type mask:
4089:
4090: my $client_type_mask = 0;
4091: if($client_ok) {
4092: $client_type_mask |= $CLIENT_OK;
4093: }
4094: if($manager_ok) {
4095: $client_type_mask |= $MANAGER_OK;
4096: }
4097:
4098: # Enter the hash:
4099:
4100: my @entry = ($procedure, $must_encode, $client_type_mask);
4101:
4102: $Dispatcher{$request_name} = \@entry;
4103:
4104: }
4105:
4106:
4107: #------------------------------------------------------------------
4108:
4109:
4110:
4111:
1.141 foxr 4112: #
1.96 foxr 4113: # Convert an error return code from lcpasswd to a string value.
4114: #
4115: sub lcpasswdstrerror {
4116: my $ErrorCode = shift;
1.97 foxr 4117: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
1.96 foxr 4118: return "lcpasswd Unrecognized error return value ".$ErrorCode;
4119: } else {
1.98 foxr 4120: return $passwderrors[$ErrorCode];
1.96 foxr 4121: }
4122: }
4123:
1.97 foxr 4124: #
4125: # Convert an error return code from lcuseradd to a string value:
4126: #
4127: sub lcuseraddstrerror {
4128: my $ErrorCode = shift;
4129: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
4130: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
4131: } else {
1.98 foxr 4132: return $adderrors[$ErrorCode];
1.97 foxr 4133: }
4134: }
4135:
1.23 harris41 4136: # grabs exception and records it to log before exiting
4137: sub catchexception {
1.27 albertel 4138: my ($error)=@_;
1.25 www 4139: $SIG{'QUIT'}='DEFAULT';
4140: $SIG{__DIE__}='DEFAULT';
1.165 albertel 4141: &status("Catching exception");
1.190 albertel 4142: &logthis("<font color='red'>CRITICAL: "
1.134 albertel 4143: ."ABNORMAL EXIT. Child $$ for server $thisserver died through "
1.27 albertel 4144: ."a crash with this error msg->[$error]</font>");
1.57 www 4145: &logthis('Famous last words: '.$status.' - '.$lastlog);
1.27 albertel 4146: if ($client) { print $client "error: $error\n"; }
1.59 www 4147: $server->close();
1.27 albertel 4148: die($error);
1.23 harris41 4149: }
1.63 www 4150: sub timeout {
1.165 albertel 4151: &status("Handling Timeout");
1.190 albertel 4152: &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
1.63 www 4153: &catchexception('Timeout');
4154: }
1.22 harris41 4155: # -------------------------------- Set signal handlers to record abnormal exits
4156:
1.226 foxr 4157:
1.22 harris41 4158: $SIG{'QUIT'}=\&catchexception;
4159: $SIG{__DIE__}=\&catchexception;
4160:
1.81 matthew 4161: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
1.95 harris41 4162: &status("Read loncapa.conf and loncapa_apache.conf");
4163: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
1.141 foxr 4164: %perlvar=%{$perlvarref};
1.80 harris41 4165: undef $perlvarref;
1.19 www 4166:
1.35 harris41 4167: # ----------------------------- Make sure this process is running from user=www
4168: my $wwwid=getpwnam('www');
4169: if ($wwwid!=$<) {
1.134 albertel 4170: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
4171: my $subj="LON: $currenthostid User ID mismatch";
1.37 harris41 4172: system("echo 'User ID mismatch. lond must be run as user www.' |\
1.35 harris41 4173: mailto $emailto -s '$subj' > /dev/null");
4174: exit 1;
4175: }
4176:
1.19 www 4177: # --------------------------------------------- Check if other instance running
4178:
4179: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
4180:
4181: if (-e $pidfile) {
4182: my $lfh=IO::File->new("$pidfile");
4183: my $pide=<$lfh>;
4184: chomp($pide);
1.29 harris41 4185: if (kill 0 => $pide) { die "already running"; }
1.19 www 4186: }
1.1 albertel 4187:
4188: # ------------------------------------------------------------- Read hosts file
4189:
4190:
4191:
4192: # establish SERVER socket, bind and listen.
4193: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
4194: Type => SOCK_STREAM,
4195: Proto => 'tcp',
4196: Reuse => 1,
4197: Listen => 10 )
1.29 harris41 4198: or die "making socket: $@\n";
1.1 albertel 4199:
4200: # --------------------------------------------------------- Do global variables
4201:
4202: # global variables
4203:
1.134 albertel 4204: my %children = (); # keys are current child process IDs
1.1 albertel 4205:
4206: sub REAPER { # takes care of dead children
4207: $SIG{CHLD} = \&REAPER;
1.165 albertel 4208: &status("Handling child death");
1.178 foxr 4209: my $pid;
4210: do {
4211: $pid = waitpid(-1,&WNOHANG());
4212: if (defined($children{$pid})) {
4213: &logthis("Child $pid died");
4214: delete($children{$pid});
1.183 albertel 4215: } elsif ($pid > 0) {
1.178 foxr 4216: &logthis("Unknown Child $pid died");
4217: }
4218: } while ( $pid > 0 );
4219: foreach my $child (keys(%children)) {
4220: $pid = waitpid($child,&WNOHANG());
4221: if ($pid > 0) {
4222: &logthis("Child $child - $pid looks like we missed it's death");
4223: delete($children{$pid});
4224: }
1.176 albertel 4225: }
1.165 albertel 4226: &status("Finished Handling child death");
1.1 albertel 4227: }
4228:
4229: sub HUNTSMAN { # signal handler for SIGINT
1.165 albertel 4230: &status("Killing children (INT)");
1.1 albertel 4231: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
4232: kill 'INT' => keys %children;
1.59 www 4233: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.1 albertel 4234: my $execdir=$perlvar{'lonDaemons'};
4235: unlink("$execdir/logs/lond.pid");
1.190 albertel 4236: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
1.165 albertel 4237: &status("Done killing children");
1.1 albertel 4238: exit; # clean up with dignity
4239: }
4240:
4241: sub HUPSMAN { # signal handler for SIGHUP
4242: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
1.165 albertel 4243: &status("Killing children for restart (HUP)");
1.1 albertel 4244: kill 'INT' => keys %children;
1.59 www 4245: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.190 albertel 4246: &logthis("<font color='red'>CRITICAL: Restarting</font>");
1.134 albertel 4247: my $execdir=$perlvar{'lonDaemons'};
1.30 harris41 4248: unlink("$execdir/logs/lond.pid");
1.165 albertel 4249: &status("Restarting self (HUP)");
1.1 albertel 4250: exec("$execdir/lond"); # here we go again
4251: }
4252:
1.144 foxr 4253: #
1.148 foxr 4254: # Kill off hashes that describe the host table prior to re-reading it.
4255: # Hashes affected are:
1.200 matthew 4256: # %hostid, %hostdom %hostip %hostdns.
1.148 foxr 4257: #
4258: sub KillHostHashes {
4259: foreach my $key (keys %hostid) {
4260: delete $hostid{$key};
4261: }
4262: foreach my $key (keys %hostdom) {
4263: delete $hostdom{$key};
4264: }
4265: foreach my $key (keys %hostip) {
4266: delete $hostip{$key};
4267: }
1.200 matthew 4268: foreach my $key (keys %hostdns) {
4269: delete $hostdns{$key};
4270: }
1.148 foxr 4271: }
4272: #
4273: # Read in the host table from file and distribute it into the various hashes:
4274: #
4275: # - %hostid - Indexed by IP, the loncapa hostname.
4276: # - %hostdom - Indexed by loncapa hostname, the domain.
4277: # - %hostip - Indexed by hostid, the Ip address of the host.
4278: sub ReadHostTable {
4279:
4280: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
1.200 matthew 4281: my $myloncapaname = $perlvar{'lonHostID'};
4282: Debug("My loncapa name is : $myloncapaname");
1.148 foxr 4283: while (my $configline=<CONFIG>) {
1.178 foxr 4284: if (!($configline =~ /^\s*\#/)) {
4285: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
4286: chomp($ip); $ip=~s/\D+$//;
1.200 matthew 4287: $hostid{$ip}=$id; # LonCAPA name of host by IP.
4288: $hostdom{$id}=$domain; # LonCAPA domain name of host.
4289: $hostip{$id}=$ip; # IP address of host.
4290: $hostdns{$name} = $id; # LonCAPA name of host by DNS.
4291:
4292: if ($id eq $perlvar{'lonHostID'}) {
4293: Debug("Found me in the host table: $name");
4294: $thisserver=$name;
4295: }
1.178 foxr 4296: }
1.148 foxr 4297: }
4298: close(CONFIG);
4299: }
4300: #
4301: # Reload the Apache daemon's state.
1.150 foxr 4302: # This is done by invoking /home/httpd/perl/apachereload
4303: # a setuid perl script that can be root for us to do this job.
1.148 foxr 4304: #
4305: sub ReloadApache {
1.150 foxr 4306: my $execdir = $perlvar{'lonDaemons'};
4307: my $script = $execdir."/apachereload";
4308: system($script);
1.148 foxr 4309: }
4310:
4311: #
1.144 foxr 4312: # Called in response to a USR2 signal.
4313: # - Reread hosts.tab
4314: # - All children connected to hosts that were removed from hosts.tab
4315: # are killed via SIGINT
4316: # - All children connected to previously existing hosts are sent SIGUSR1
4317: # - Our internal hosts hash is updated to reflect the new contents of
4318: # hosts.tab causing connections from hosts added to hosts.tab to
4319: # now be honored.
4320: #
4321: sub UpdateHosts {
1.165 albertel 4322: &status("Reload hosts.tab");
1.147 foxr 4323: logthis('<font color="blue"> Updating connections </font>');
1.148 foxr 4324: #
4325: # The %children hash has the set of IP's we currently have children
4326: # on. These need to be matched against records in the hosts.tab
4327: # Any ip's no longer in the table get killed off they correspond to
4328: # either dropped or changed hosts. Note that the re-read of the table
4329: # will take care of new and changed hosts as connections come into being.
4330:
4331:
4332: KillHostHashes;
4333: ReadHostTable;
4334:
4335: foreach my $child (keys %children) {
4336: my $childip = $children{$child};
4337: if(!$hostid{$childip}) {
1.149 foxr 4338: logthis('<font color="blue"> UpdateHosts killing child '
4339: ." $child for ip $childip </font>");
1.148 foxr 4340: kill('INT', $child);
1.149 foxr 4341: } else {
4342: logthis('<font color="green"> keeping child for ip '
4343: ." $childip (pid=$child) </font>");
1.148 foxr 4344: }
4345: }
4346: ReloadApache;
1.165 albertel 4347: &status("Finished reloading hosts.tab");
1.144 foxr 4348: }
4349:
1.148 foxr 4350:
1.57 www 4351: sub checkchildren {
1.165 albertel 4352: &status("Checking on the children (sending signals)");
1.57 www 4353: &initnewstatus();
4354: &logstatus();
4355: &logthis('Going to check on the children');
1.134 albertel 4356: my $docdir=$perlvar{'lonDocRoot'};
1.61 harris41 4357: foreach (sort keys %children) {
1.221 albertel 4358: #sleep 1;
1.57 www 4359: unless (kill 'USR1' => $_) {
4360: &logthis ('Child '.$_.' is dead');
4361: &logstatus($$.' is dead');
1.221 albertel 4362: delete($children{$_});
1.57 www 4363: }
1.61 harris41 4364: }
1.63 www 4365: sleep 5;
1.212 foxr 4366: $SIG{ALRM} = sub { Debug("timeout");
4367: die "timeout"; };
1.113 albertel 4368: $SIG{__DIE__} = 'DEFAULT';
1.165 albertel 4369: &status("Checking on the children (waiting for reports)");
1.63 www 4370: foreach (sort keys %children) {
4371: unless (-e "$docdir/lon-status/londchld/$_.txt") {
1.113 albertel 4372: eval {
4373: alarm(300);
1.63 www 4374: &logthis('Child '.$_.' did not respond');
1.67 albertel 4375: kill 9 => $_;
1.131 albertel 4376: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
4377: #$subj="LON: $currenthostid killed lond process $_";
4378: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
4379: #$execdir=$perlvar{'lonDaemons'};
4380: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
1.221 albertel 4381: delete($children{$_});
1.113 albertel 4382: alarm(0);
4383: }
1.63 www 4384: }
4385: }
1.113 albertel 4386: $SIG{ALRM} = 'DEFAULT';
1.155 albertel 4387: $SIG{__DIE__} = \&catchexception;
1.165 albertel 4388: &status("Finished checking children");
1.221 albertel 4389: &logthis('Finished Checking children');
1.57 www 4390: }
4391:
1.1 albertel 4392: # --------------------------------------------------------------------- Logging
4393:
4394: sub logthis {
4395: my $message=shift;
4396: my $execdir=$perlvar{'lonDaemons'};
4397: my $fh=IO::File->new(">>$execdir/logs/lond.log");
4398: my $now=time;
4399: my $local=localtime($now);
1.58 www 4400: $lastlog=$local.': '.$message;
1.1 albertel 4401: print $fh "$local ($$): $message\n";
4402: }
4403:
1.77 foxr 4404: # ------------------------- Conditional log if $DEBUG true.
4405: sub Debug {
4406: my $message = shift;
4407: if($DEBUG) {
4408: &logthis($message);
4409: }
4410: }
1.161 foxr 4411:
4412: #
4413: # Sub to do replies to client.. this gives a hook for some
4414: # debug tracing too:
4415: # Parameters:
4416: # fd - File open on client.
4417: # reply - Text to send to client.
4418: # request - Original request from client.
4419: #
4420: sub Reply {
1.192 foxr 4421: my ($fd, $reply, $request) = @_;
1.161 foxr 4422: print $fd $reply;
4423: Debug("Request was $request Reply was $reply");
4424:
1.212 foxr 4425: $Transactions++;
4426:
4427:
4428: }
4429:
4430:
4431: #
4432: # Sub to report a failure.
4433: # This function:
4434: # - Increments the failure statistic counters.
4435: # - Invokes Reply to send the error message to the client.
4436: # Parameters:
4437: # fd - File descriptor open on the client
4438: # reply - Reply text to emit.
4439: # request - The original request message (used by Reply
4440: # to debug if that's enabled.
4441: # Implicit outputs:
4442: # $Failures- The number of failures is incremented.
4443: # Reply (invoked here) sends a message to the
4444: # client:
4445: #
4446: sub Failure {
4447: my $fd = shift;
4448: my $reply = shift;
4449: my $request = shift;
4450:
4451: $Failures++;
4452: Reply($fd, $reply, $request); # That's simple eh?
1.161 foxr 4453: }
1.57 www 4454: # ------------------------------------------------------------------ Log status
4455:
4456: sub logstatus {
1.178 foxr 4457: &status("Doing logging");
4458: my $docdir=$perlvar{'lonDocRoot'};
4459: {
4460: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
1.200 matthew 4461: print $fh $status."\n".$lastlog."\n".time."\n$keymode";
1.178 foxr 4462: $fh->close();
4463: }
1.221 albertel 4464: &status("Finished $$.txt");
4465: {
4466: open(LOG,">>$docdir/lon-status/londstatus.txt");
4467: flock(LOG,LOCK_EX);
4468: print LOG $$."\t".$clientname."\t".$currenthostid."\t"
4469: .$status."\t".$lastlog."\t $keymode\n";
1.275 albertel 4470: flock(LOG,LOCK_UN);
1.221 albertel 4471: close(LOG);
4472: }
1.178 foxr 4473: &status("Finished logging");
1.57 www 4474: }
4475:
4476: sub initnewstatus {
4477: my $docdir=$perlvar{'lonDocRoot'};
4478: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
4479: my $now=time;
4480: my $local=localtime($now);
4481: print $fh "LOND status $local - parent $$\n\n";
1.64 www 4482: opendir(DIR,"$docdir/lon-status/londchld");
1.134 albertel 4483: while (my $filename=readdir(DIR)) {
1.64 www 4484: unlink("$docdir/lon-status/londchld/$filename");
4485: }
4486: closedir(DIR);
1.57 www 4487: }
4488:
4489: # -------------------------------------------------------------- Status setting
4490:
4491: sub status {
4492: my $what=shift;
4493: my $now=time;
4494: my $local=localtime($now);
1.178 foxr 4495: $status=$local.': '.$what;
4496: $0='lond: '.$what.' '.$local;
1.57 www 4497: }
1.11 www 4498:
4499: # -------------------------------------------------------- Escape Special Chars
4500:
4501: sub escape {
4502: my $str=shift;
4503: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
4504: return $str;
4505: }
4506:
4507: # ----------------------------------------------------- Un-Escape Special Chars
4508:
4509: sub unescape {
4510: my $str=shift;
4511: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
4512: return $str;
4513: }
4514:
1.1 albertel 4515: # ----------------------------------------------------------- Send USR1 to lonc
4516:
4517: sub reconlonc {
4518: my $peerfile=shift;
4519: &logthis("Trying to reconnect for $peerfile");
4520: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
4521: if (my $fh=IO::File->new("$loncfile")) {
4522: my $loncpid=<$fh>;
4523: chomp($loncpid);
4524: if (kill 0 => $loncpid) {
4525: &logthis("lonc at pid $loncpid responding, sending USR1");
4526: kill USR1 => $loncpid;
4527: } else {
1.9 www 4528: &logthis(
1.190 albertel 4529: "<font color='red'>CRITICAL: "
1.9 www 4530: ."lonc at pid $loncpid not responding, giving up</font>");
1.1 albertel 4531: }
4532: } else {
1.190 albertel 4533: &logthis('<font color="red">CRITICAL: lonc not running, giving up</font>');
1.1 albertel 4534: }
4535: }
4536:
4537: # -------------------------------------------------- Non-critical communication
1.11 www 4538:
1.1 albertel 4539: sub subreply {
4540: my ($cmd,$server)=@_;
4541: my $peerfile="$perlvar{'lonSockDir'}/$server";
4542: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
4543: Type => SOCK_STREAM,
4544: Timeout => 10)
4545: or return "con_lost";
4546: print $sclient "$cmd\n";
4547: my $answer=<$sclient>;
4548: chomp($answer);
4549: if (!$answer) { $answer="con_lost"; }
4550: return $answer;
4551: }
4552:
4553: sub reply {
4554: my ($cmd,$server)=@_;
4555: my $answer;
1.115 albertel 4556: if ($server ne $currenthostid) {
1.1 albertel 4557: $answer=subreply($cmd,$server);
4558: if ($answer eq 'con_lost') {
4559: $answer=subreply("ping",$server);
4560: if ($answer ne $server) {
1.115 albertel 4561: &logthis("sub reply: answer != server answer is $answer, server is $server");
1.1 albertel 4562: &reconlonc("$perlvar{'lonSockDir'}/$server");
4563: }
4564: $answer=subreply($cmd,$server);
4565: }
4566: } else {
4567: $answer='self_reply';
4568: }
4569: return $answer;
4570: }
4571:
1.13 www 4572: # -------------------------------------------------------------- Talk to lonsql
4573:
1.234 foxr 4574: sub sql_reply {
1.12 harris41 4575: my ($cmd)=@_;
1.234 foxr 4576: my $answer=&sub_sql_reply($cmd);
4577: if ($answer eq 'con_lost') { $answer=&sub_sql_reply($cmd); }
1.12 harris41 4578: return $answer;
4579: }
4580:
1.234 foxr 4581: sub sub_sql_reply {
1.12 harris41 4582: my ($cmd)=@_;
4583: my $unixsock="mysqlsock";
4584: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
4585: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
4586: Type => SOCK_STREAM,
4587: Timeout => 10)
4588: or return "con_lost";
4589: print $sclient "$cmd\n";
4590: my $answer=<$sclient>;
4591: chomp($answer);
4592: if (!$answer) { $answer="con_lost"; }
4593: return $answer;
4594: }
4595:
1.1 albertel 4596: # -------------------------------------------- Return path to profile directory
1.11 www 4597:
1.1 albertel 4598: sub propath {
4599: my ($udom,$uname)=@_;
4600: $udom=~s/\W//g;
4601: $uname=~s/\W//g;
1.16 www 4602: my $subdir=$uname.'__';
1.1 albertel 4603: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
4604: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
4605: return $proname;
4606: }
4607:
4608: # --------------------------------------- Is this the home server of an author?
1.11 www 4609:
1.1 albertel 4610: sub ishome {
4611: my $author=shift;
4612: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
4613: my ($udom,$uname)=split(/\//,$author);
4614: my $proname=propath($udom,$uname);
4615: if (-e $proname) {
4616: return 'owner';
4617: } else {
4618: return 'not_owner';
4619: }
4620: }
4621:
4622: # ======================================================= Continue main program
4623: # ---------------------------------------------------- Fork once and dissociate
4624:
1.134 albertel 4625: my $fpid=fork;
1.1 albertel 4626: exit if $fpid;
1.29 harris41 4627: die "Couldn't fork: $!" unless defined ($fpid);
1.1 albertel 4628:
1.29 harris41 4629: POSIX::setsid() or die "Can't start new session: $!";
1.1 albertel 4630:
4631: # ------------------------------------------------------- Write our PID on disk
4632:
1.134 albertel 4633: my $execdir=$perlvar{'lonDaemons'};
1.1 albertel 4634: open (PIDSAVE,">$execdir/logs/lond.pid");
4635: print PIDSAVE "$$\n";
4636: close(PIDSAVE);
1.190 albertel 4637: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
1.57 www 4638: &status('Starting');
1.1 albertel 4639:
1.106 foxr 4640:
1.1 albertel 4641:
4642: # ----------------------------------------------------- Install signal handlers
4643:
1.57 www 4644:
1.1 albertel 4645: $SIG{CHLD} = \&REAPER;
4646: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
4647: $SIG{HUP} = \&HUPSMAN;
1.57 www 4648: $SIG{USR1} = \&checkchildren;
1.144 foxr 4649: $SIG{USR2} = \&UpdateHosts;
1.106 foxr 4650:
1.148 foxr 4651: # Read the host hashes:
4652:
4653: ReadHostTable;
1.106 foxr 4654:
4655: # --------------------------------------------------------------
4656: # Accept connections. When a connection comes in, it is validated
4657: # and if good, a child process is created to process transactions
4658: # along the connection.
4659:
1.1 albertel 4660: while (1) {
1.165 albertel 4661: &status('Starting accept');
1.106 foxr 4662: $client = $server->accept() or next;
1.165 albertel 4663: &status('Accepted '.$client.' off to spawn');
1.106 foxr 4664: make_new_child($client);
1.165 albertel 4665: &status('Finished spawning');
1.1 albertel 4666: }
4667:
1.212 foxr 4668: sub make_new_child {
4669: my $pid;
4670: # my $cipher; # Now global
4671: my $sigset;
1.178 foxr 4672:
1.212 foxr 4673: $client = shift;
4674: &status('Starting new child '.$client);
4675: &logthis('<font color="green"> Attempting to start child ('.$client.
4676: ")</font>");
4677: # block signal for fork
4678: $sigset = POSIX::SigSet->new(SIGINT);
4679: sigprocmask(SIG_BLOCK, $sigset)
4680: or die "Can't block SIGINT for fork: $!\n";
1.178 foxr 4681:
1.212 foxr 4682: die "fork: $!" unless defined ($pid = fork);
1.178 foxr 4683:
1.212 foxr 4684: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
4685: # connection liveness.
1.178 foxr 4686:
1.212 foxr 4687: #
4688: # Figure out who we're talking to so we can record the peer in
4689: # the pid hash.
4690: #
4691: my $caller = getpeername($client);
4692: my ($port,$iaddr);
4693: if (defined($caller) && length($caller) > 0) {
4694: ($port,$iaddr)=unpack_sockaddr_in($caller);
4695: } else {
4696: &logthis("Unable to determine who caller was, getpeername returned nothing");
4697: }
4698: if (defined($iaddr)) {
4699: $clientip = inet_ntoa($iaddr);
4700: Debug("Connected with $clientip");
4701: $clientdns = gethostbyaddr($iaddr, AF_INET);
4702: Debug("Connected with $clientdns by name");
4703: } else {
4704: &logthis("Unable to determine clientip");
4705: $clientip='Unavailable';
4706: }
4707:
4708: if ($pid) {
4709: # Parent records the child's birth and returns.
4710: sigprocmask(SIG_UNBLOCK, $sigset)
4711: or die "Can't unblock SIGINT for fork: $!\n";
4712: $children{$pid} = $clientip;
4713: &status('Started child '.$pid);
4714: return;
4715: } else {
4716: # Child can *not* return from this subroutine.
4717: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
4718: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
4719: #don't get intercepted
4720: $SIG{USR1}= \&logstatus;
4721: $SIG{ALRM}= \&timeout;
4722: $lastlog='Forked ';
4723: $status='Forked';
1.178 foxr 4724:
1.212 foxr 4725: # unblock signals
4726: sigprocmask(SIG_UNBLOCK, $sigset)
4727: or die "Can't unblock SIGINT for fork: $!\n";
1.178 foxr 4728:
1.212 foxr 4729: # my $tmpsnum=0; # Now global
4730: #---------------------------------------------------- kerberos 5 initialization
4731: &Authen::Krb5::init_context();
4732: &Authen::Krb5::init_ets();
1.209 albertel 4733:
1.212 foxr 4734: &status('Accepted connection');
4735: # =============================================================================
4736: # do something with the connection
4737: # -----------------------------------------------------------------------------
4738: # see if we know client and 'check' for spoof IP by ineffective challenge
1.178 foxr 4739:
1.212 foxr 4740: ReadManagerTable; # May also be a manager!!
4741:
4742: my $clientrec=($hostid{$clientip} ne undef);
4743: my $ismanager=($managers{$clientip} ne undef);
4744: $clientname = "[unknonwn]";
4745: if($clientrec) { # Establish client type.
4746: $ConnectionType = "client";
4747: $clientname = $hostid{$clientip};
4748: if($ismanager) {
4749: $ConnectionType = "both";
4750: }
4751: } else {
4752: $ConnectionType = "manager";
4753: $clientname = $managers{$clientip};
4754: }
4755: my $clientok;
1.178 foxr 4756:
1.212 foxr 4757: if ($clientrec || $ismanager) {
4758: &status("Waiting for init from $clientip $clientname");
4759: &logthis('<font color="yellow">INFO: Connection, '.
4760: $clientip.
4761: " ($clientname) connection type = $ConnectionType </font>" );
4762: &status("Connecting $clientip ($clientname))");
4763: my $remotereq=<$client>;
4764: chomp($remotereq);
4765: Debug("Got init: $remotereq");
4766: my $inikeyword = split(/:/, $remotereq);
4767: if ($remotereq =~ /^init/) {
4768: &sethost("sethost:$perlvar{'lonHostID'}");
4769: #
4770: # If the remote is attempting a local init... give that a try:
4771: #
4772: my ($i, $inittype) = split(/:/, $remotereq);
1.209 albertel 4773:
1.212 foxr 4774: # If the connection type is ssl, but I didn't get my
4775: # certificate files yet, then I'll drop back to
4776: # insecure (if allowed).
4777:
4778: if($inittype eq "ssl") {
4779: my ($ca, $cert) = lonssl::CertificateFile;
4780: my $kfile = lonssl::KeyFile;
4781: if((!$ca) ||
4782: (!$cert) ||
4783: (!$kfile)) {
4784: $inittype = ""; # This forces insecure attempt.
4785: &logthis("<font color=\"blue\"> Certificates not "
4786: ."installed -- trying insecure auth</font>");
1.224 foxr 4787: } else { # SSL certificates are in place so
1.212 foxr 4788: } # Leave the inittype alone.
4789: }
4790:
4791: if($inittype eq "local") {
4792: my $key = LocalConnection($client, $remotereq);
4793: if($key) {
4794: Debug("Got local key $key");
4795: $clientok = 1;
4796: my $cipherkey = pack("H32", $key);
4797: $cipher = new IDEA($cipherkey);
4798: print $client "ok:local\n";
4799: &logthis('<font color="green"'
4800: . "Successful local authentication </font>");
4801: $keymode = "local"
1.178 foxr 4802: } else {
1.212 foxr 4803: Debug("Failed to get local key");
4804: $clientok = 0;
4805: shutdown($client, 3);
4806: close $client;
1.178 foxr 4807: }
1.212 foxr 4808: } elsif ($inittype eq "ssl") {
4809: my $key = SSLConnection($client);
4810: if ($key) {
4811: $clientok = 1;
4812: my $cipherkey = pack("H32", $key);
4813: $cipher = new IDEA($cipherkey);
4814: &logthis('<font color="green">'
4815: ."Successfull ssl authentication with $clientname </font>");
4816: $keymode = "ssl";
4817:
1.178 foxr 4818: } else {
1.212 foxr 4819: $clientok = 0;
4820: close $client;
1.178 foxr 4821: }
1.212 foxr 4822:
4823: } else {
4824: my $ok = InsecureConnection($client);
4825: if($ok) {
4826: $clientok = 1;
4827: &logthis('<font color="green">'
4828: ."Successful insecure authentication with $clientname </font>");
4829: print $client "ok\n";
4830: $keymode = "insecure";
1.178 foxr 4831: } else {
1.212 foxr 4832: &logthis('<font color="yellow">'
4833: ."Attempted insecure connection disallowed </font>");
4834: close $client;
4835: $clientok = 0;
1.178 foxr 4836:
4837: }
4838: }
1.212 foxr 4839: } else {
4840: &logthis(
4841: "<font color='blue'>WARNING: "
4842: ."$clientip failed to initialize: >$remotereq< </font>");
4843: &status('No init '.$clientip);
4844: }
4845:
4846: } else {
4847: &logthis(
4848: "<font color='blue'>WARNING: Unknown client $clientip</font>");
4849: &status('Hung up on '.$clientip);
4850: }
4851:
4852: if ($clientok) {
4853: # ---------------- New known client connecting, could mean machine online again
4854:
4855: foreach my $id (keys(%hostip)) {
4856: if ($hostip{$id} ne $clientip ||
4857: $hostip{$currenthostid} eq $clientip) {
4858: # no need to try to do recon's to myself
4859: next;
4860: }
4861: &reconlonc("$perlvar{'lonSockDir'}/$id");
4862: }
4863: &logthis("<font color='green'>Established connection: $clientname</font>");
4864: &status('Will listen to '.$clientname);
4865: # ------------------------------------------------------------ Process requests
4866: my $keep_going = 1;
4867: my $user_input;
4868: while(($user_input = get_request) && $keep_going) {
4869: alarm(120);
4870: Debug("Main: Got $user_input\n");
4871: $keep_going = &process_request($user_input);
1.178 foxr 4872: alarm(0);
1.212 foxr 4873: &status('Listening to '.$clientname." ($keymode)");
1.161 foxr 4874: }
1.212 foxr 4875:
1.59 www 4876: # --------------------------------------------- client unknown or fishy, refuse
1.212 foxr 4877: } else {
1.161 foxr 4878: print $client "refused\n";
4879: $client->close();
1.190 albertel 4880: &logthis("<font color='blue'>WARNING: "
1.161 foxr 4881: ."Rejected client $clientip, closing connection</font>");
4882: }
1.212 foxr 4883: }
1.161 foxr 4884:
1.1 albertel 4885: # =============================================================================
1.161 foxr 4886:
1.190 albertel 4887: &logthis("<font color='red'>CRITICAL: "
1.161 foxr 4888: ."Disconnect from $clientip ($clientname)</font>");
4889:
4890:
4891: # this exit is VERY important, otherwise the child will become
4892: # a producer of more and more children, forking yourself into
4893: # process death.
4894: exit;
1.106 foxr 4895:
1.78 foxr 4896: }
1.261 foxr 4897: #
4898: # Determine if a user is an author for the indicated domain.
4899: #
4900: # Parameters:
4901: # domain - domain to check in .
4902: # user - Name of user to check.
4903: #
4904: # Return:
4905: # 1 - User is an author for domain.
4906: # 0 - User is not an author for domain.
4907: sub is_author {
4908: my ($domain, $user) = @_;
4909:
4910: &Debug("is_author: $user @ $domain");
4911:
4912: my $hashref = &tie_user_hash($domain, $user, "roles",
4913: &GDBM_READER());
4914:
4915: # Author role should show up as a key /domain/_au
1.78 foxr 4916:
1.261 foxr 4917: my $key = "/$domain/_au";
4918: my $value = $hashref->{$key};
1.78 foxr 4919:
1.261 foxr 4920: if(defined($value)) {
4921: &Debug("$user @ $domain is an author");
4922: }
4923:
4924: return defined($value);
4925: }
1.78 foxr 4926: #
4927: # Checks to see if the input roleput request was to set
4928: # an author role. If so, invokes the lchtmldir script to set
4929: # up a correct public_html
4930: # Parameters:
4931: # request - The request sent to the rolesput subchunk.
4932: # We're looking for /domain/_au
4933: # domain - The domain in which the user is having roles doctored.
4934: # user - Name of the user for which the role is being put.
4935: # authtype - The authentication type associated with the user.
4936: #
1.230 foxr 4937: sub manage_permissions
1.78 foxr 4938: {
1.192 foxr 4939:
1.261 foxr 4940:
1.192 foxr 4941: my ($request, $domain, $user, $authtype) = @_;
1.78 foxr 4942:
1.261 foxr 4943: &Debug("manage_permissions: $request $domain $user $authtype");
4944:
1.78 foxr 4945: # See if the request is of the form /$domain/_au
4946: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
4947: my $execdir = $perlvar{'lonDaemons'};
4948: my $userhome= "/home/$user" ;
1.134 albertel 4949: &logthis("system $execdir/lchtmldir $userhome $user $authtype");
1.261 foxr 4950: &Debug("Setting homedir permissions for $userhome");
1.78 foxr 4951: system("$execdir/lchtmldir $userhome $user $authtype");
4952: }
4953: }
1.222 foxr 4954:
4955:
4956: #
4957: # Return the full path of a user password file, whether it exists or not.
4958: # Parameters:
4959: # domain - Domain in which the password file lives.
4960: # user - name of the user.
4961: # Returns:
4962: # Full passwd path:
4963: #
4964: sub password_path {
4965: my ($domain, $user) = @_;
1.264 albertel 4966: return &propath($domain, $user).'/passwd';
1.222 foxr 4967: }
4968:
4969: # Password Filename
4970: # Returns the path to a passwd file given domain and user... only if
4971: # it exists.
4972: # Parameters:
4973: # domain - Domain in which to search.
4974: # user - username.
4975: # Returns:
4976: # - If the password file exists returns its path.
4977: # - If the password file does not exist, returns undefined.
4978: #
4979: sub password_filename {
4980: my ($domain, $user) = @_;
4981:
4982: Debug ("PasswordFilename called: dom = $domain user = $user");
4983:
4984: my $path = &password_path($domain, $user);
4985: Debug("PasswordFilename got path: $path");
4986: if(-e $path) {
4987: return $path;
4988: } else {
4989: return undef;
4990: }
4991: }
4992:
4993: #
4994: # Rewrite the contents of the user's passwd file.
4995: # Parameters:
4996: # domain - domain of the user.
4997: # name - User's name.
4998: # contents - New contents of the file.
4999: # Returns:
5000: # 0 - Failed.
5001: # 1 - Success.
5002: #
5003: sub rewrite_password_file {
5004: my ($domain, $user, $contents) = @_;
5005:
5006: my $file = &password_filename($domain, $user);
5007: if (defined $file) {
5008: my $pf = IO::File->new(">$file");
5009: if($pf) {
5010: print $pf "$contents\n";
5011: return 1;
5012: } else {
5013: return 0;
5014: }
5015: } else {
5016: return 0;
5017: }
5018:
5019: }
5020:
1.78 foxr 5021: #
1.222 foxr 5022: # get_auth_type - Determines the authorization type of a user in a domain.
1.78 foxr 5023:
5024: # Returns the authorization type or nouser if there is no such user.
5025: #
1.222 foxr 5026: sub get_auth_type
1.78 foxr 5027: {
1.192 foxr 5028:
5029: my ($domain, $user) = @_;
1.78 foxr 5030:
1.222 foxr 5031: Debug("get_auth_type( $domain, $user ) \n");
1.78 foxr 5032: my $proname = &propath($domain, $user);
5033: my $passwdfile = "$proname/passwd";
5034: if( -e $passwdfile ) {
5035: my $pf = IO::File->new($passwdfile);
5036: my $realpassword = <$pf>;
5037: chomp($realpassword);
1.79 foxr 5038: Debug("Password info = $realpassword\n");
1.78 foxr 5039: my ($authtype, $contentpwd) = split(/:/, $realpassword);
1.79 foxr 5040: Debug("Authtype = $authtype, content = $contentpwd\n");
1.259 raeburn 5041: return "$authtype:$contentpwd";
1.224 foxr 5042: } else {
1.79 foxr 5043: Debug("Returning nouser");
1.78 foxr 5044: return "nouser";
5045: }
1.1 albertel 5046: }
5047:
1.220 foxr 5048: #
5049: # Validate a user given their domain, name and password. This utility
5050: # function is used by both AuthenticateHandler and ChangePasswordHandler
5051: # to validate the login credentials of a user.
5052: # Parameters:
5053: # $domain - The domain being logged into (this is required due to
5054: # the capability for multihomed systems.
5055: # $user - The name of the user being validated.
5056: # $password - The user's propoposed password.
5057: #
5058: # Returns:
5059: # 1 - The domain,user,pasword triplet corresponds to a valid
5060: # user.
5061: # 0 - The domain,user,password triplet is not a valid user.
5062: #
5063: sub validate_user {
5064: my ($domain, $user, $password) = @_;
5065:
5066:
5067: # Why negative ~pi you may well ask? Well this function is about
5068: # authentication, and therefore very important to get right.
5069: # I've initialized the flag that determines whether or not I've
5070: # validated correctly to a value it's not supposed to get.
5071: # At the end of this function. I'll ensure that it's not still that
5072: # value so we don't just wind up returning some accidental value
5073: # as a result of executing an unforseen code path that
1.249 foxr 5074: # did not set $validated. At the end of valid execution paths,
5075: # validated shoule be 1 for success or 0 for failuer.
1.220 foxr 5076:
5077: my $validated = -3.14159;
5078:
5079: # How we authenticate is determined by the type of authentication
5080: # the user has been assigned. If the authentication type is
5081: # "nouser", the user does not exist so we will return 0.
5082:
1.222 foxr 5083: my $contents = &get_auth_type($domain, $user);
1.220 foxr 5084: my ($howpwd, $contentpwd) = split(/:/, $contents);
5085:
5086: my $null = pack("C",0); # Used by kerberos auth types.
5087:
5088: if ($howpwd ne 'nouser') {
5089:
5090: if($howpwd eq "internal") { # Encrypted is in local password file.
5091: $validated = (crypt($password, $contentpwd) eq $contentpwd);
5092: }
5093: elsif ($howpwd eq "unix") { # User is a normal unix user.
5094: $contentpwd = (getpwnam($user))[1];
5095: if($contentpwd) {
5096: if($contentpwd eq 'x') { # Shadow password file...
5097: my $pwauth_path = "/usr/local/sbin/pwauth";
5098: open PWAUTH, "|$pwauth_path" or
5099: die "Cannot invoke authentication";
5100: print PWAUTH "$user\n$password\n";
5101: close PWAUTH;
5102: $validated = ! $?;
5103:
5104: } else { # Passwords in /etc/passwd.
5105: $validated = (crypt($password,
5106: $contentpwd) eq $contentpwd);
5107: }
5108: } else {
5109: $validated = 0;
5110: }
5111: }
5112: elsif ($howpwd eq "krb4") { # user is in kerberos 4 auth. domain.
5113: if(! ($password =~ /$null/) ) {
5114: my $k4error = &Authen::Krb4::get_pw_in_tkt($user,
5115: "",
5116: $contentpwd,,
5117: 'krbtgt',
5118: $contentpwd,
5119: 1,
5120: $password);
5121: if(!$k4error) {
5122: $validated = 1;
1.224 foxr 5123: } else {
1.220 foxr 5124: $validated = 0;
5125: &logthis('krb4: '.$user.', '.$contentpwd.', '.
5126: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
5127: }
1.224 foxr 5128: } else {
1.220 foxr 5129: $validated = 0; # Password has a match with null.
5130: }
1.224 foxr 5131: } elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain.
1.220 foxr 5132: if(!($password =~ /$null/)) { # Null password not allowed.
5133: my $krbclient = &Authen::Krb5::parse_name($user.'@'
5134: .$contentpwd);
5135: my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd;
5136: my $krbserver = &Authen::Krb5::parse_name($krbservice);
5137: my $credentials= &Authen::Krb5::cc_default();
5138: $credentials->initialize($krbclient);
1.270 matthew 5139: my $krbreturn = &Authen::Krb5::get_in_tkt_with_password($krbclient,
1.220 foxr 5140: $krbserver,
5141: $password,
5142: $credentials);
5143: $validated = ($krbreturn == 1);
1.224 foxr 5144: } else {
1.220 foxr 5145: $validated = 0;
5146: }
1.224 foxr 5147: } elsif ($howpwd eq "localauth") {
1.220 foxr 5148: # Authenticate via installation specific authentcation method:
5149: $validated = &localauth::localauth($user,
5150: $password,
5151: $contentpwd);
1.224 foxr 5152: } else { # Unrecognized auth is also bad.
1.220 foxr 5153: $validated = 0;
5154: }
5155: } else {
5156: $validated = 0;
5157: }
5158: #
5159: # $validated has the correct stat of the authentication:
5160: #
5161:
5162: unless ($validated != -3.14159) {
1.249 foxr 5163: # I >really really< want to know if this happens.
5164: # since it indicates that user authentication is badly
5165: # broken in some code path.
5166: #
5167: die "ValidateUser - failed to set the value of validated $domain, $user $password";
1.220 foxr 5168: }
5169: return $validated;
5170: }
5171:
5172:
1.84 albertel 5173: sub addline {
5174: my ($fname,$hostid,$ip,$newline)=@_;
5175: my $contents;
5176: my $found=0;
5177: my $expr='^'.$hostid.':'.$ip.':';
5178: $expr =~ s/\./\\\./g;
1.134 albertel 5179: my $sh;
1.84 albertel 5180: if ($sh=IO::File->new("$fname.subscription")) {
5181: while (my $subline=<$sh>) {
5182: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
5183: }
5184: $sh->close();
5185: }
5186: $sh=IO::File->new(">$fname.subscription");
5187: if ($contents) { print $sh $contents; }
5188: if ($newline) { print $sh $newline; }
5189: $sh->close();
5190: return $found;
1.86 www 5191: }
5192:
1.234 foxr 5193: sub get_chat {
1.122 www 5194: my ($cdom,$cname,$udom,$uname)=@_;
1.87 www 5195: my %hash;
5196: my $proname=&propath($cdom,$cname);
5197: my @entries=();
1.88 albertel 5198: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
5199: &GDBM_READER(),0640)) {
5200: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
5201: untie %hash;
1.123 www 5202: }
1.124 www 5203: my @participants=();
1.134 albertel 5204: my $cutoff=time-60;
1.123 www 5205: if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db",
1.124 www 5206: &GDBM_WRCREAT(),0640)) {
5207: $hash{$uname.':'.$udom}=time;
1.123 www 5208: foreach (sort keys %hash) {
5209: if ($hash{$_}>$cutoff) {
1.124 www 5210: $participants[$#participants+1]='active_participant:'.$_;
1.123 www 5211: }
5212: }
5213: untie %hash;
1.86 www 5214: }
1.124 www 5215: return (@participants,@entries);
1.86 www 5216: }
5217:
1.234 foxr 5218: sub chat_add {
1.88 albertel 5219: my ($cdom,$cname,$newchat)=@_;
5220: my %hash;
5221: my $proname=&propath($cdom,$cname);
5222: my @entries=();
1.142 www 5223: my $time=time;
1.88 albertel 5224: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
5225: &GDBM_WRCREAT(),0640)) {
5226: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
5227: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
5228: my ($thentime,$idnum)=split(/\_/,$lastid);
5229: my $newid=$time.'_000000';
5230: if ($thentime==$time) {
5231: $idnum=~s/^0+//;
5232: $idnum++;
5233: $idnum=substr('000000'.$idnum,-6,6);
5234: $newid=$time.'_'.$idnum;
5235: }
5236: $hash{$newid}=$newchat;
5237: my $expired=$time-3600;
5238: foreach (keys %hash) {
5239: my ($thistime)=($_=~/(\d+)\_/);
5240: if ($thistime<$expired) {
1.89 www 5241: delete $hash{$_};
1.88 albertel 5242: }
5243: }
5244: untie %hash;
1.142 www 5245: }
5246: {
5247: my $hfh;
5248: if ($hfh=IO::File->new(">>$proname/chatroom.log")) {
5249: print $hfh "$time:".&unescape($newchat)."\n";
5250: }
1.86 www 5251: }
1.84 albertel 5252: }
5253:
5254: sub unsub {
5255: my ($fname,$clientip)=@_;
5256: my $result;
1.188 foxr 5257: my $unsubs = 0; # Number of successful unsubscribes:
5258:
5259:
5260: # An old way subscriptions were handled was to have a
5261: # subscription marker file:
5262:
5263: Debug("Attempting unlink of $fname.$clientname");
1.161 foxr 5264: if (unlink("$fname.$clientname")) {
1.188 foxr 5265: $unsubs++; # Successful unsub via marker file.
5266: }
5267:
5268: # The more modern way to do it is to have a subscription list
5269: # file:
5270:
1.84 albertel 5271: if (-e "$fname.subscription") {
1.161 foxr 5272: my $found=&addline($fname,$clientname,$clientip,'');
1.188 foxr 5273: if ($found) {
5274: $unsubs++;
5275: }
5276: }
5277:
5278: # If either or both of these mechanisms succeeded in unsubscribing a
5279: # resource we can return ok:
5280:
5281: if($unsubs) {
5282: $result = "ok\n";
1.84 albertel 5283: } else {
1.188 foxr 5284: $result = "not_subscribed\n";
1.84 albertel 5285: }
1.188 foxr 5286:
1.84 albertel 5287: return $result;
5288: }
5289:
1.101 www 5290: sub currentversion {
5291: my $fname=shift;
5292: my $version=-1;
5293: my $ulsdir='';
5294: if ($fname=~/^(.+)\/[^\/]+$/) {
5295: $ulsdir=$1;
5296: }
1.114 albertel 5297: my ($fnamere1,$fnamere2);
5298: # remove version if already specified
1.101 www 5299: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
1.114 albertel 5300: # get the bits that go before and after the version number
5301: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
5302: $fnamere1=$1;
5303: $fnamere2='.'.$2;
5304: }
1.101 www 5305: if (-e $fname) { $version=1; }
5306: if (-e $ulsdir) {
1.134 albertel 5307: if(-d $ulsdir) {
5308: if (opendir(LSDIR,$ulsdir)) {
5309: my $ulsfn;
5310: while ($ulsfn=readdir(LSDIR)) {
1.101 www 5311: # see if this is a regular file (ignore links produced earlier)
1.134 albertel 5312: my $thisfile=$ulsdir.'/'.$ulsfn;
5313: unless (-l $thisfile) {
1.160 www 5314: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
1.134 albertel 5315: if ($1>$version) { $version=$1; }
5316: }
5317: }
5318: }
5319: closedir(LSDIR);
5320: $version++;
5321: }
5322: }
5323: }
5324: return $version;
1.101 www 5325: }
5326:
5327: sub thisversion {
5328: my $fname=shift;
5329: my $version=-1;
5330: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
5331: $version=$1;
5332: }
5333: return $version;
5334: }
5335:
1.84 albertel 5336: sub subscribe {
5337: my ($userinput,$clientip)=@_;
5338: my $result;
5339: my ($cmd,$fname)=split(/:/,$userinput);
5340: my $ownership=&ishome($fname);
5341: if ($ownership eq 'owner') {
1.101 www 5342: # explitly asking for the current version?
5343: unless (-e $fname) {
5344: my $currentversion=¤tversion($fname);
5345: if (&thisversion($fname)==$currentversion) {
5346: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
5347: my $root=$1;
5348: my $extension=$2;
5349: symlink($root.'.'.$extension,
5350: $root.'.'.$currentversion.'.'.$extension);
1.102 www 5351: unless ($extension=~/\.meta$/) {
5352: symlink($root.'.'.$extension.'.meta',
5353: $root.'.'.$currentversion.'.'.$extension.'.meta');
5354: }
1.101 www 5355: }
5356: }
5357: }
1.84 albertel 5358: if (-e $fname) {
5359: if (-d $fname) {
5360: $result="directory\n";
5361: } else {
1.161 foxr 5362: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
1.134 albertel 5363: my $now=time;
1.161 foxr 5364: my $found=&addline($fname,$clientname,$clientip,
5365: "$clientname:$clientip:$now\n");
1.84 albertel 5366: if ($found) { $result="$fname\n"; }
5367: # if they were subscribed to only meta data, delete that
5368: # subscription, when you subscribe to a file you also get
5369: # the metadata
5370: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
5371: $fname=~s/\/home\/httpd\/html\/res/raw/;
5372: $fname="http://$thisserver/".$fname;
5373: $result="$fname\n";
5374: }
5375: } else {
5376: $result="not_found\n";
5377: }
5378: } else {
5379: $result="rejected\n";
5380: }
5381: return $result;
5382: }
1.91 albertel 5383:
5384: sub make_passwd_file {
1.98 foxr 5385: my ($uname, $umode,$npass,$passfilename)=@_;
1.91 albertel 5386: my $result="ok\n";
5387: if ($umode eq 'krb4' or $umode eq 'krb5') {
5388: {
5389: my $pf = IO::File->new(">$passfilename");
1.261 foxr 5390: if ($pf) {
5391: print $pf "$umode:$npass\n";
5392: } else {
5393: $result = "pass_file_failed_error";
5394: }
1.91 albertel 5395: }
5396: } elsif ($umode eq 'internal') {
5397: my $salt=time;
5398: $salt=substr($salt,6,2);
5399: my $ncpass=crypt($npass,$salt);
5400: {
5401: &Debug("Creating internal auth");
5402: my $pf = IO::File->new(">$passfilename");
1.261 foxr 5403: if($pf) {
5404: print $pf "internal:$ncpass\n";
5405: } else {
5406: $result = "pass_file_failed_error";
5407: }
1.91 albertel 5408: }
5409: } elsif ($umode eq 'localauth') {
5410: {
5411: my $pf = IO::File->new(">$passfilename");
1.261 foxr 5412: if($pf) {
5413: print $pf "localauth:$npass\n";
5414: } else {
5415: $result = "pass_file_failed_error";
5416: }
1.91 albertel 5417: }
5418: } elsif ($umode eq 'unix') {
5419: {
1.186 foxr 5420: #
5421: # Don't allow the creation of privileged accounts!!! that would
5422: # be real bad!!!
5423: #
5424: my $uid = getpwnam($uname);
5425: if((defined $uid) && ($uid == 0)) {
5426: &logthis(">>>Attempted to create privilged account blocked");
5427: return "no_priv_account_error\n";
5428: }
5429:
1.223 foxr 5430: my $execpath ="$perlvar{'lonDaemons'}/"."lcuseradd";
1.224 foxr 5431:
5432: my $lc_error_file = $execdir."/tmp/lcuseradd".$$.".status";
1.91 albertel 5433: {
5434: &Debug("Executing external: ".$execpath);
1.98 foxr 5435: &Debug("user = ".$uname.", Password =". $npass);
1.132 matthew 5436: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
1.91 albertel 5437: print $se "$uname\n";
5438: print $se "$npass\n";
5439: print $se "$npass\n";
1.223 foxr 5440: print $se "$lc_error_file\n"; # Status -> unique file.
1.97 foxr 5441: }
1.223 foxr 5442: my $error = IO::File->new("< $lc_error_file");
5443: my $useraddok = <$error>;
5444: $error->close;
5445: unlink($lc_error_file);
5446:
5447: chomp $useraddok;
5448:
1.97 foxr 5449: if($useraddok > 0) {
1.223 foxr 5450: my $error_text = &lcuseraddstrerror($useraddok);
5451: &logthis("Failed lcuseradd: $error_text");
5452: $result = "lcuseradd_failed:$error_text\n";
1.224 foxr 5453: } else {
1.223 foxr 5454: my $pf = IO::File->new(">$passfilename");
1.261 foxr 5455: if($pf) {
5456: print $pf "unix:\n";
5457: } else {
5458: $result = "pass_file_failed_error";
5459: }
1.91 albertel 5460: }
5461: }
5462: } elsif ($umode eq 'none') {
5463: {
1.223 foxr 5464: my $pf = IO::File->new("> $passfilename");
1.261 foxr 5465: if($pf) {
5466: print $pf "none:\n";
5467: } else {
5468: $result = "pass_file_failed_error";
5469: }
1.91 albertel 5470: }
5471: } else {
5472: $result="auth_mode_error\n";
5473: }
5474: return $result;
1.121 albertel 5475: }
5476:
1.265 albertel 5477: sub convert_photo {
5478: my ($start,$dest)=@_;
5479: system("convert $start $dest");
5480: }
5481:
1.121 albertel 5482: sub sethost {
5483: my ($remotereq) = @_;
5484: my (undef,$hostid)=split(/:/,$remotereq);
5485: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
5486: if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
1.200 matthew 5487: $currenthostid =$hostid;
1.121 albertel 5488: $currentdomainid=$hostdom{$hostid};
5489: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
5490: } else {
5491: &logthis("Requested host id $hostid not an alias of ".
5492: $perlvar{'lonHostID'}." refusing connection");
5493: return 'unable_to_set';
5494: }
5495: return 'ok';
5496: }
5497:
5498: sub version {
5499: my ($userinput)=@_;
5500: $remoteVERSION=(split(/:/,$userinput))[1];
5501: return "version:$VERSION";
1.127 albertel 5502: }
1.178 foxr 5503:
1.128 albertel 5504: #There is a copy of this in lonnet.pm
1.127 albertel 5505: sub userload {
5506: my $numusers=0;
5507: {
5508: opendir(LONIDS,$perlvar{'lonIDsDir'});
5509: my $filename;
5510: my $curtime=time;
5511: while ($filename=readdir(LONIDS)) {
5512: if ($filename eq '.' || $filename eq '..') {next;}
1.138 albertel 5513: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
1.159 albertel 5514: if ($curtime-$mtime < 1800) { $numusers++; }
1.127 albertel 5515: }
5516: closedir(LONIDS);
5517: }
5518: my $userloadpercent=0;
5519: my $maxuserload=$perlvar{'lonUserLoadLim'};
5520: if ($maxuserload) {
1.129 albertel 5521: $userloadpercent=100*$numusers/$maxuserload;
1.127 albertel 5522: }
1.130 albertel 5523: $userloadpercent=sprintf("%.2f",$userloadpercent);
1.127 albertel 5524: return $userloadpercent;
1.91 albertel 5525: }
5526:
1.205 raeburn 5527: # Routines for serializing arrays and hashes (copies from lonnet)
5528:
5529: sub array2str {
5530: my (@array) = @_;
5531: my $result=&arrayref2str(\@array);
5532: $result=~s/^__ARRAY_REF__//;
5533: $result=~s/__END_ARRAY_REF__$//;
5534: return $result;
5535: }
5536:
5537: sub arrayref2str {
5538: my ($arrayref) = @_;
5539: my $result='__ARRAY_REF__';
5540: foreach my $elem (@$arrayref) {
5541: if(ref($elem) eq 'ARRAY') {
5542: $result.=&arrayref2str($elem).'&';
5543: } elsif(ref($elem) eq 'HASH') {
5544: $result.=&hashref2str($elem).'&';
5545: } elsif(ref($elem)) {
5546: #print("Got a ref of ".(ref($elem))." skipping.");
5547: } else {
5548: $result.=&escape($elem).'&';
5549: }
5550: }
5551: $result=~s/\&$//;
5552: $result .= '__END_ARRAY_REF__';
5553: return $result;
5554: }
5555:
5556: sub hash2str {
5557: my (%hash) = @_;
5558: my $result=&hashref2str(\%hash);
5559: $result=~s/^__HASH_REF__//;
5560: $result=~s/__END_HASH_REF__$//;
5561: return $result;
5562: }
5563:
5564: sub hashref2str {
5565: my ($hashref)=@_;
5566: my $result='__HASH_REF__';
5567: foreach (sort(keys(%$hashref))) {
5568: if (ref($_) eq 'ARRAY') {
5569: $result.=&arrayref2str($_).'=';
5570: } elsif (ref($_) eq 'HASH') {
5571: $result.=&hashref2str($_).'=';
5572: } elsif (ref($_)) {
5573: $result.='=';
5574: #print("Got a ref of ".(ref($_))." skipping.");
5575: } else {
5576: if ($_) {$result.=&escape($_).'=';} else { last; }
5577: }
5578:
5579: if(ref($hashref->{$_}) eq 'ARRAY') {
5580: $result.=&arrayref2str($hashref->{$_}).'&';
5581: } elsif(ref($hashref->{$_}) eq 'HASH') {
5582: $result.=&hashref2str($hashref->{$_}).'&';
5583: } elsif(ref($hashref->{$_})) {
5584: $result.='&';
5585: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
5586: } else {
5587: $result.=&escape($hashref->{$_}).'&';
5588: }
5589: }
5590: $result=~s/\&$//;
5591: $result .= '__END_HASH_REF__';
5592: return $result;
5593: }
1.200 matthew 5594:
1.61 harris41 5595: # ----------------------------------- POD (plain old documentation, CPAN style)
5596:
5597: =head1 NAME
5598:
5599: lond - "LON Daemon" Server (port "LOND" 5663)
5600:
5601: =head1 SYNOPSIS
5602:
1.74 harris41 5603: Usage: B<lond>
5604:
5605: Should only be run as user=www. This is a command-line script which
5606: is invoked by B<loncron>. There is no expectation that a typical user
5607: will manually start B<lond> from the command-line. (In other words,
5608: DO NOT START B<lond> YOURSELF.)
1.61 harris41 5609:
5610: =head1 DESCRIPTION
5611:
1.74 harris41 5612: There are two characteristics associated with the running of B<lond>,
5613: PROCESS MANAGEMENT (starting, stopping, handling child processes)
5614: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
5615: subscriptions, etc). These are described in two large
5616: sections below.
5617:
5618: B<PROCESS MANAGEMENT>
5619:
1.61 harris41 5620: Preforker - server who forks first. Runs as a daemon. HUPs.
5621: Uses IDEA encryption
5622:
1.74 harris41 5623: B<lond> forks off children processes that correspond to the other servers
5624: in the network. Management of these processes can be done at the
5625: parent process level or the child process level.
5626:
5627: B<logs/lond.log> is the location of log messages.
5628:
5629: The process management is now explained in terms of linux shell commands,
5630: subroutines internal to this code, and signal assignments:
5631:
5632: =over 4
5633:
5634: =item *
5635:
5636: PID is stored in B<logs/lond.pid>
5637:
5638: This is the process id number of the parent B<lond> process.
5639:
5640: =item *
5641:
5642: SIGTERM and SIGINT
5643:
5644: Parent signal assignment:
5645: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
5646:
5647: Child signal assignment:
5648: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
5649: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
5650: to restart a new child.)
5651:
5652: Command-line invocations:
5653: B<kill> B<-s> SIGTERM I<PID>
5654: B<kill> B<-s> SIGINT I<PID>
5655:
5656: Subroutine B<HUNTSMAN>:
5657: This is only invoked for the B<lond> parent I<PID>.
5658: This kills all the children, and then the parent.
5659: The B<lonc.pid> file is cleared.
5660:
5661: =item *
5662:
5663: SIGHUP
5664:
5665: Current bug:
5666: This signal can only be processed the first time
5667: on the parent process. Subsequent SIGHUP signals
5668: have no effect.
5669:
5670: Parent signal assignment:
5671: $SIG{HUP} = \&HUPSMAN;
5672:
5673: Child signal assignment:
5674: none (nothing happens)
5675:
5676: Command-line invocations:
5677: B<kill> B<-s> SIGHUP I<PID>
5678:
5679: Subroutine B<HUPSMAN>:
5680: This is only invoked for the B<lond> parent I<PID>,
5681: This kills all the children, and then the parent.
5682: The B<lond.pid> file is cleared.
5683:
5684: =item *
5685:
5686: SIGUSR1
5687:
5688: Parent signal assignment:
5689: $SIG{USR1} = \&USRMAN;
5690:
5691: Child signal assignment:
5692: $SIG{USR1}= \&logstatus;
5693:
5694: Command-line invocations:
5695: B<kill> B<-s> SIGUSR1 I<PID>
5696:
5697: Subroutine B<USRMAN>:
5698: When invoked for the B<lond> parent I<PID>,
5699: SIGUSR1 is sent to all the children, and the status of
5700: each connection is logged.
1.144 foxr 5701:
5702: =item *
5703:
5704: SIGUSR2
5705:
5706: Parent Signal assignment:
5707: $SIG{USR2} = \&UpdateHosts
5708:
5709: Child signal assignment:
5710: NONE
5711:
1.74 harris41 5712:
5713: =item *
5714:
5715: SIGCHLD
5716:
5717: Parent signal assignment:
5718: $SIG{CHLD} = \&REAPER;
5719:
5720: Child signal assignment:
5721: none
5722:
5723: Command-line invocations:
5724: B<kill> B<-s> SIGCHLD I<PID>
5725:
5726: Subroutine B<REAPER>:
5727: This is only invoked for the B<lond> parent I<PID>.
5728: Information pertaining to the child is removed.
5729: The socket port is cleaned up.
5730:
5731: =back
5732:
5733: B<SERVER-SIDE ACTIVITIES>
5734:
5735: Server-side information can be accepted in an encrypted or non-encrypted
5736: method.
5737:
5738: =over 4
5739:
5740: =item ping
5741:
5742: Query a client in the hosts.tab table; "Are you there?"
5743:
5744: =item pong
5745:
5746: Respond to a ping query.
5747:
5748: =item ekey
5749:
5750: Read in encrypted key, make cipher. Respond with a buildkey.
5751:
5752: =item load
5753:
5754: Respond with CPU load based on a computation upon /proc/loadavg.
5755:
5756: =item currentauth
5757:
5758: Reply with current authentication information (only over an
5759: encrypted channel).
5760:
5761: =item auth
5762:
5763: Only over an encrypted channel, reply as to whether a user's
5764: authentication information can be validated.
5765:
5766: =item passwd
5767:
5768: Allow for a password to be set.
5769:
5770: =item makeuser
5771:
5772: Make a user.
5773:
5774: =item passwd
5775:
5776: Allow for authentication mechanism and password to be changed.
5777:
5778: =item home
1.61 harris41 5779:
1.74 harris41 5780: Respond to a question "are you the home for a given user?"
5781:
5782: =item update
5783:
5784: Update contents of a subscribed resource.
5785:
5786: =item unsubscribe
5787:
5788: The server is unsubscribing from a resource.
5789:
5790: =item subscribe
5791:
5792: The server is subscribing to a resource.
5793:
5794: =item log
5795:
5796: Place in B<logs/lond.log>
5797:
5798: =item put
5799:
5800: stores hash in namespace
5801:
1.230 foxr 5802: =item rolesputy
1.74 harris41 5803:
5804: put a role into a user's environment
5805:
5806: =item get
5807:
5808: returns hash with keys from array
5809: reference filled in from namespace
5810:
5811: =item eget
5812:
5813: returns hash with keys from array
5814: reference filled in from namesp (encrypts the return communication)
5815:
5816: =item rolesget
5817:
5818: get a role from a user's environment
5819:
5820: =item del
5821:
5822: deletes keys out of array from namespace
5823:
5824: =item keys
5825:
5826: returns namespace keys
5827:
5828: =item dump
5829:
5830: dumps the complete (or key matching regexp) namespace into a hash
5831:
5832: =item store
5833:
5834: stores hash permanently
5835: for this url; hashref needs to be given and should be a \%hashname; the
5836: remaining args aren't required and if they aren't passed or are '' they will
5837: be derived from the ENV
5838:
5839: =item restore
5840:
5841: returns a hash for a given url
5842:
5843: =item querysend
5844:
5845: Tells client about the lonsql process that has been launched in response
5846: to a sent query.
5847:
5848: =item queryreply
5849:
5850: Accept information from lonsql and make appropriate storage in temporary
5851: file space.
5852:
5853: =item idput
5854:
5855: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
5856: for each student, defined perhaps by the institutional Registrar.)
5857:
5858: =item idget
5859:
5860: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
5861: for each student, defined perhaps by the institutional Registrar.)
5862:
5863: =item tmpput
5864:
5865: Accept and store information in temporary space.
5866:
5867: =item tmpget
5868:
5869: Send along temporarily stored information.
5870:
5871: =item ls
5872:
5873: List part of a user's directory.
5874:
1.135 foxr 5875: =item pushtable
5876:
5877: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
5878: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
5879: must be restored manually in case of a problem with the new table file.
5880: pushtable requires that the request be encrypted and validated via
5881: ValidateManager. The form of the command is:
5882: enc:pushtable tablename <tablecontents> \n
5883: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
5884: cleartext newline.
5885:
1.74 harris41 5886: =item Hanging up (exit or init)
5887:
5888: What to do when a client tells the server that they (the client)
5889: are leaving the network.
5890:
5891: =item unknown command
5892:
5893: If B<lond> is sent an unknown command (not in the list above),
5894: it replys to the client "unknown_cmd".
1.135 foxr 5895:
1.74 harris41 5896:
5897: =item UNKNOWN CLIENT
5898:
5899: If the anti-spoofing algorithm cannot verify the client,
5900: the client is rejected (with a "refused" message sent
5901: to the client, and the connection is closed.
5902:
5903: =back
1.61 harris41 5904:
5905: =head1 PREREQUISITES
5906:
5907: IO::Socket
5908: IO::File
5909: Apache::File
5910: Symbol
5911: POSIX
5912: Crypt::IDEA
5913: LWP::UserAgent()
5914: GDBM_File
5915: Authen::Krb4
1.91 albertel 5916: Authen::Krb5
1.61 harris41 5917:
5918: =head1 COREQUISITES
5919:
5920: =head1 OSNAMES
5921:
5922: linux
5923:
5924: =head1 SCRIPT CATEGORIES
5925:
5926: Server/Process
5927:
5928: =cut
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to lond CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom