Annotation of loncom/lond, revision 1.334
1.1 albertel 1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
1.60 www 4: #
1.334 ! albertel 5: # $Id: lond,v 1.333 2006/06/07 01:49:43 raeburn Exp $
1.60 www 6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
1.167 foxr 13: # the Free Software Foundation; either version 2 of the License, or
1.60 www 14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
1.178 foxr 23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
1.60 www 24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
1.161 foxr 27:
28:
1.60 www 29: # http://www.lon-capa.org/
30: #
1.54 harris41 31:
1.134 albertel 32: use strict;
1.80 harris41 33: use lib '/home/httpd/lib/perl/';
1.325 albertel 34: use LONCAPA;
1.80 harris41 35: use LONCAPA::Configuration;
36:
1.1 albertel 37: use IO::Socket;
38: use IO::File;
1.126 albertel 39: #use Apache::File;
1.1 albertel 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;
1.292 albertel 51: use File::Find;
1.169 foxr 52: use LONCAPA::ConfigFileEdit;
1.200 matthew 53: use LONCAPA::lonlocal;
54: use LONCAPA::lonssl;
1.221 albertel 55: use Fcntl qw(:flock);
1.1 albertel 56:
1.239 foxr 57: my $DEBUG = 0; # Non zero to enable debug log entries.
1.77 foxr 58:
1.57 www 59: my $status='';
60: my $lastlog='';
61:
1.334 ! albertel 62: my $VERSION='$Revision: 1.333 $'; #' stupid emacs
1.121 albertel 63: my $remoteVERSION;
1.214 foxr 64: my $currenthostid="default";
1.115 albertel 65: my $currentdomainid;
1.134 albertel 66:
67: my $client;
1.200 matthew 68: my $clientip; # IP address 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.
1.307 albertel 90: my %hostname; # DNSname -> ID's mapping.
1.200 matthew 91: my %hostip; # IPs for hosts in cluster.
92: my %hostdns; # ID's of hosts looked up by DNS name.
1.161 foxr 93:
1.178 foxr 94: my %managers; # Ip -> manager names
1.161 foxr 95:
1.178 foxr 96: my %perlvar; # Will have the apache conf defined perl vars.
1.134 albertel 97:
1.178 foxr 98: #
1.207 foxr 99: # The hash below is used for command dispatching, and is therefore keyed on the request keyword.
100: # Each element of the hash contains a reference to an array that contains:
101: # A reference to a sub that executes the request corresponding to the keyword.
102: # A flag that is true if the request must be encoded to be acceptable.
103: # A mask with bits as follows:
104: # CLIENT_OK - Set when the function is allowed by ordinary clients
105: # MANAGER_OK - Set when the function is allowed to manager clients.
106: #
107: my $CLIENT_OK = 1;
108: my $MANAGER_OK = 2;
109: my %Dispatcher;
110:
111:
112: #
1.178 foxr 113: # The array below are password error strings."
114: #
115: my $lastpwderror = 13; # Largest error number from lcpasswd.
116: my @passwderrors = ("ok",
1.287 foxr 117: "pwchange_failure - lcpasswd must be run as user 'www'",
118: "pwchange_failure - lcpasswd got incorrect number of arguments",
119: "pwchange_failure - lcpasswd did not get the right nubmer of input text lines",
120: "pwchange_failure - lcpasswd too many simultaneous pwd changes in progress",
121: "pwchange_failure - lcpasswd User does not exist.",
122: "pwchange_failure - lcpasswd Incorrect current passwd",
123: "pwchange_failure - lcpasswd Unable to su to root.",
124: "pwchange_failure - lcpasswd Cannot set new passwd.",
125: "pwchange_failure - lcpasswd Username has invalid characters",
126: "pwchange_failure - lcpasswd Invalid characters in password",
127: "pwchange_failure - lcpasswd User already exists",
128: "pwchange_failure - lcpasswd Something went wrong with user addition.",
129: "pwchange_failure - lcpasswd Password mismatch",
130: "pwchange_failure - lcpasswd Error filename is invalid");
1.97 foxr 131:
132:
1.178 foxr 133: # The array below are lcuseradd error strings.:
1.97 foxr 134:
1.178 foxr 135: my $lastadderror = 13;
136: my @adderrors = ("ok",
137: "User ID mismatch, lcuseradd must run as user www",
138: "lcuseradd Incorrect number of command line parameters must be 3",
139: "lcuseradd Incorrect number of stdinput lines, must be 3",
140: "lcuseradd Too many other simultaneous pwd changes in progress",
141: "lcuseradd User does not exist",
142: "lcuseradd Unable to make www member of users's group",
143: "lcuseradd Unable to su to root",
144: "lcuseradd Unable to set password",
145: "lcuseradd Usrname has invalid characters",
146: "lcuseradd Password has an invalid character",
147: "lcuseradd User already exists",
148: "lcuseradd Could not add user.",
149: "lcuseradd Password mismatch");
1.97 foxr 150:
1.96 foxr 151:
1.207 foxr 152:
153: #
154: # Statistics that are maintained and dislayed in the status line.
155: #
1.212 foxr 156: my $Transactions = 0; # Number of attempted transactions.
157: my $Failures = 0; # Number of transcations failed.
1.207 foxr 158:
159: # ResetStatistics:
160: # Resets the statistics counters:
161: #
162: sub ResetStatistics {
163: $Transactions = 0;
164: $Failures = 0;
165: }
166:
1.200 matthew 167: #------------------------------------------------------------------------
168: #
169: # LocalConnection
170: # Completes the formation of a locally authenticated connection.
171: # This function will ensure that the 'remote' client is really the
172: # local host. If not, the connection is closed, and the function fails.
173: # If so, initcmd is parsed for the name of a file containing the
174: # IDEA session key. The fie is opened, read, deleted and the session
175: # key returned to the caller.
176: #
177: # Parameters:
178: # $Socket - Socket open on client.
179: # $initcmd - The full text of the init command.
180: #
181: # Implicit inputs:
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) = @_;
1.277 albertel 190: Debug("Attempting local connection: $initcmd client: $clientip me: $thisserver");
191: if($clientip ne "127.0.0.1") {
1.200 matthew 192: &logthis('<font color="red"> LocalConnection rejecting non local: '
1.277 albertel 193: ."$clientip ne $thisserver </font>");
1.200 matthew 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:
1.281 matthew 477: if (! copy($oldfile,$newfile)) {
478: return 0;
1.143 foxr 479: }
1.281 matthew 480: chmod(0660, $newfile);
481: return 1;
1.143 foxr 482: }
1.157 foxr 483: #
484: # Host files are passed out with externally visible host IPs.
485: # If, for example, we are behind a fire-wall or NAT host, our
486: # internally visible IP may be different than the externally
487: # visible IP. Therefore, we always adjust the contents of the
488: # host file so that the entry for ME is the IP that we believe
489: # we have. At present, this is defined as the entry that
490: # DNS has for us. If by some chance we are not able to get a
491: # DNS translation for us, then we assume that the host.tab file
492: # is correct.
493: # BUGBUGBUG - in the future, we really should see if we can
494: # easily query the interface(s) instead.
495: # Parameter(s):
496: # contents - The contents of the host.tab to check.
497: # Returns:
498: # newcontents - The adjusted contents.
499: #
500: #
501: sub AdjustHostContents {
502: my $contents = shift;
503: my $adjusted;
504: my $me = $perlvar{'lonHostID'};
505:
1.166 foxr 506: foreach my $line (split(/\n/,$contents)) {
1.157 foxr 507: if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/))) {
508: chomp($line);
509: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
510: if ($id eq $me) {
1.166 foxr 511: my $ip = gethostbyname($name);
512: my $ipnew = inet_ntoa($ip);
513: $ip = $ipnew;
1.157 foxr 514: # Reconstruct the host line and append to adjusted:
515:
1.166 foxr 516: my $newline = "$id:$domain:$role:$name:$ip";
517: if($maxcon ne "") { # Not all hosts have loncnew tuning params
518: $newline .= ":$maxcon:$idleto:$mincon";
519: }
520: $adjusted .= $newline."\n";
1.157 foxr 521:
1.166 foxr 522: } else { # Not me, pass unmodified.
523: $adjusted .= $line."\n";
524: }
1.157 foxr 525: } else { # Blank or comment never re-written.
526: $adjusted .= $line."\n"; # Pass blanks and comments as is.
527: }
1.166 foxr 528: }
529: return $adjusted;
1.157 foxr 530: }
1.143 foxr 531: #
532: # InstallFile: Called to install an administrative file:
533: # - The file is created with <name>.tmp
534: # - The <name>.tmp file is then mv'd to <name>
535: # This lugubrious procedure is done to ensure that we are never without
536: # a valid, even if dated, version of the file regardless of who crashes
537: # and when the crash occurs.
538: #
539: # Parameters:
540: # Name of the file
541: # File Contents.
542: # Return:
543: # nonzero - success.
544: # 0 - failure and $! has an errno.
545: #
546: sub InstallFile {
1.192 foxr 547:
548: my ($Filename, $Contents) = @_;
1.143 foxr 549: my $TempFile = $Filename.".tmp";
550:
551: # Open the file for write:
552:
553: my $fh = IO::File->new("> $TempFile"); # Write to temp.
554: if(!(defined $fh)) {
555: &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
556: return 0;
557: }
558: # write the contents of the file:
559:
560: print $fh ($Contents);
561: $fh->close; # In case we ever have a filesystem w. locking
562:
563: chmod(0660, $TempFile);
564:
565: # Now we can move install the file in position.
566:
567: move($TempFile, $Filename);
568:
569: return 1;
570: }
1.200 matthew 571:
572:
1.169 foxr 573: #
574: # ConfigFileFromSelector: converts a configuration file selector
575: # (one of host or domain at this point) into a
576: # configuration file pathname.
577: #
578: # Parameters:
579: # selector - Configuration file selector.
580: # Returns:
581: # Full path to the file or undef if the selector is invalid.
582: #
583: sub ConfigFileFromSelector {
584: my $selector = shift;
585: my $tablefile;
586:
587: my $tabledir = $perlvar{'lonTabDir'}.'/';
588: if ($selector eq "hosts") {
589: $tablefile = $tabledir."hosts.tab";
590: } elsif ($selector eq "domain") {
591: $tablefile = $tabledir."domain.tab";
592: } else {
593: return undef;
594: }
595: return $tablefile;
1.143 foxr 596:
1.169 foxr 597: }
1.143 foxr 598: #
1.141 foxr 599: # PushFile: Called to do an administrative push of a file.
600: # - Ensure the file being pushed is one we support.
601: # - Backup the old file to <filename.saved>
602: # - Separate the contents of the new file out from the
603: # rest of the request.
604: # - Write the new file.
605: # Parameter:
606: # Request - The entire user request. This consists of a : separated
607: # string pushfile:tablename:contents.
608: # NOTE: The contents may have :'s in it as well making things a bit
609: # more interesting... but not much.
610: # Returns:
611: # String to send to client ("ok" or "refused" if bad file).
612: #
613: sub PushFile {
614: my $request = shift;
615: my ($command, $filename, $contents) = split(":", $request, 3);
616:
617: # At this point in time, pushes for only the following tables are
618: # supported:
619: # hosts.tab ($filename eq host).
620: # domain.tab ($filename eq domain).
621: # Construct the destination filename or reject the request.
622: #
623: # lonManage is supposed to ensure this, however this session could be
624: # part of some elaborate spoof that managed somehow to authenticate.
625: #
626:
1.169 foxr 627:
628: my $tablefile = ConfigFileFromSelector($filename);
629: if(! (defined $tablefile)) {
1.141 foxr 630: return "refused";
631: }
632: #
633: # >copy< the old table to the backup table
634: # don't rename in case system crashes/reboots etc. in the time
635: # window between a rename and write.
636: #
637: my $backupfile = $tablefile;
638: $backupfile =~ s/\.tab$/.old/;
1.143 foxr 639: if(!CopyFile($tablefile, $backupfile)) {
640: &logthis('<font color="green"> CopyFile from '.$tablefile." to ".$backupfile." failed </font>");
641: return "error:$!";
642: }
1.141 foxr 643: &logthis('<font color="green"> Pushfile: backed up '
644: .$tablefile." to $backupfile</font>");
645:
1.157 foxr 646: # If the file being pushed is the host file, we adjust the entry for ourself so that the
647: # IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible
648: # to conceive of conditions where we don't have a DNS entry locally. This is possible in a
649: # network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
650: # that possibilty.
651:
652: if($filename eq "host") {
653: $contents = AdjustHostContents($contents);
654: }
655:
1.141 foxr 656: # Install the new file:
657:
1.143 foxr 658: if(!InstallFile($tablefile, $contents)) {
659: &logthis('<font color="red"> Pushfile: unable to install '
1.145 foxr 660: .$tablefile." $! </font>");
1.143 foxr 661: return "error:$!";
1.224 foxr 662: } else {
1.143 foxr 663: &logthis('<font color="green"> Installed new '.$tablefile
664: ."</font>");
665:
666: }
667:
1.141 foxr 668:
669: # Indicate success:
670:
671: return "ok";
672:
673: }
1.145 foxr 674:
675: #
676: # Called to re-init either lonc or lond.
677: #
678: # Parameters:
679: # request - The full request by the client. This is of the form
680: # reinit:<process>
681: # where <process> is allowed to be either of
682: # lonc or lond
683: #
684: # Returns:
685: # The string to be sent back to the client either:
686: # ok - Everything worked just fine.
687: # error:why - There was a failure and why describes the reason.
688: #
689: #
690: sub ReinitProcess {
691: my $request = shift;
692:
1.146 foxr 693:
694: # separate the request (reinit) from the process identifier and
695: # validate it producing the name of the .pid file for the process.
696: #
697: #
698: my ($junk, $process) = split(":", $request);
1.147 foxr 699: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
1.146 foxr 700: if($process eq 'lonc') {
701: $processpidfile = $processpidfile."lonc.pid";
1.147 foxr 702: if (!open(PIDFILE, "< $processpidfile")) {
703: return "error:Open failed for $processpidfile";
704: }
705: my $loncpid = <PIDFILE>;
706: close(PIDFILE);
707: logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
708: ."</font>");
709: kill("USR2", $loncpid);
1.146 foxr 710: } elsif ($process eq 'lond') {
1.147 foxr 711: logthis('<font color="red"> Reinitializing self (lond) </font>');
712: &UpdateHosts; # Lond is us!!
1.146 foxr 713: } else {
714: &logthis('<font color="yellow" Invalid reinit request for '.$process
715: ."</font>");
716: return "error:Invalid process identifier $process";
717: }
1.145 foxr 718: return 'ok';
719: }
1.168 foxr 720: # Validate a line in a configuration file edit script:
721: # Validation includes:
722: # - Ensuring the command is valid.
723: # - Ensuring the command has sufficient parameters
724: # Parameters:
725: # scriptline - A line to validate (\n has been stripped for what it's worth).
1.167 foxr 726: #
1.168 foxr 727: # Return:
728: # 0 - Invalid scriptline.
729: # 1 - Valid scriptline
730: # NOTE:
731: # Only the command syntax is checked, not the executability of the
732: # command.
733: #
734: sub isValidEditCommand {
735: my $scriptline = shift;
736:
737: # Line elements are pipe separated:
738:
739: my ($command, $key, $newline) = split(/\|/, $scriptline);
740: &logthis('<font color="green"> isValideditCommand checking: '.
741: "Command = '$command', Key = '$key', Newline = '$newline' </font>\n");
742:
743: if ($command eq "delete") {
744: #
745: # key with no newline.
746: #
747: if( ($key eq "") || ($newline ne "")) {
748: return 0; # Must have key but no newline.
749: } else {
750: return 1; # Valid syntax.
751: }
1.169 foxr 752: } elsif ($command eq "replace") {
1.168 foxr 753: #
754: # key and newline:
755: #
756: if (($key eq "") || ($newline eq "")) {
757: return 0;
758: } else {
759: return 1;
760: }
1.169 foxr 761: } elsif ($command eq "append") {
762: if (($key ne "") && ($newline eq "")) {
763: return 1;
764: } else {
765: return 0;
766: }
1.168 foxr 767: } else {
768: return 0; # Invalid command.
769: }
770: return 0; # Should not get here!!!
771: }
1.169 foxr 772: #
773: # ApplyEdit - Applies an edit command to a line in a configuration
774: # file. It is the caller's responsiblity to validate the
775: # edit line.
776: # Parameters:
777: # $directive - A single edit directive to apply.
778: # Edit directives are of the form:
779: # append|newline - Appends a new line to the file.
780: # replace|key|newline - Replaces the line with key value 'key'
781: # delete|key - Deletes the line with key value 'key'.
782: # $editor - A config file editor object that contains the
783: # file being edited.
784: #
785: sub ApplyEdit {
1.192 foxr 786:
787: my ($directive, $editor) = @_;
1.169 foxr 788:
789: # Break the directive down into its command and its parameters
790: # (at most two at this point. The meaning of the parameters, if in fact
791: # they exist depends on the command).
792:
793: my ($command, $p1, $p2) = split(/\|/, $directive);
794:
795: if($command eq "append") {
796: $editor->Append($p1); # p1 - key p2 null.
797: } elsif ($command eq "replace") {
798: $editor->ReplaceLine($p1, $p2); # p1 - key p2 = newline.
799: } elsif ($command eq "delete") {
800: $editor->DeleteLine($p1); # p1 - key p2 null.
801: } else { # Should not get here!!!
802: die "Invalid command given to ApplyEdit $command"
803: }
804: }
805: #
806: # AdjustOurHost:
807: # Adjusts a host file stored in a configuration file editor object
808: # for the true IP address of this host. This is necessary for hosts
809: # that live behind a firewall.
810: # Those hosts have a publicly distributed IP of the firewall, but
811: # internally must use their actual IP. We assume that a given
812: # host only has a single IP interface for now.
813: # Formal Parameters:
814: # editor - The configuration file editor to adjust. This
815: # editor is assumed to contain a hosts.tab file.
816: # Strategy:
817: # - Figure out our hostname.
818: # - Lookup the entry for this host.
819: # - Modify the line to contain our IP
820: # - Do a replace for this host.
821: sub AdjustOurHost {
822: my $editor = shift;
823:
824: # figure out who I am.
825:
826: my $myHostName = $perlvar{'lonHostID'}; # LonCAPA hostname.
827:
828: # Get my host file entry.
829:
830: my $ConfigLine = $editor->Find($myHostName);
831: if(! (defined $ConfigLine)) {
832: die "AdjustOurHost - no entry for me in hosts file $myHostName";
833: }
834: # figure out my IP:
835: # Use the config line to get my hostname.
836: # Use gethostbyname to translate that into an IP address.
837: #
838: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);
839: my $BinaryIp = gethostbyname($name);
840: my $ip = inet_ntoa($ip);
841: #
842: # Reassemble the config line from the elements in the list.
843: # Note that if the loncnew items were not present before, they will
844: # be now even if they would be empty
845: #
846: my $newConfigLine = $id;
847: foreach my $item ($domain, $role, $name, $ip, $maxcon, $idleto, $mincon) {
848: $newConfigLine .= ":".$item;
849: }
850: # Replace the line:
851:
852: $editor->ReplaceLine($id, $newConfigLine);
853:
854: }
855: #
856: # ReplaceConfigFile:
857: # Replaces a configuration file with the contents of a
858: # configuration file editor object.
859: # This is done by:
860: # - Copying the target file to <filename>.old
861: # - Writing the new file to <filename>.tmp
862: # - Moving <filename.tmp> -> <filename>
863: # This laborious process ensures that the system is never without
864: # a configuration file that's at least valid (even if the contents
865: # may be dated).
866: # Parameters:
867: # filename - Name of the file to modify... this is a full path.
868: # editor - Editor containing the file.
869: #
870: sub ReplaceConfigFile {
1.192 foxr 871:
872: my ($filename, $editor) = @_;
1.168 foxr 873:
1.169 foxr 874: CopyFile ($filename, $filename.".old");
875:
876: my $contents = $editor->Get(); # Get the contents of the file.
877:
878: InstallFile($filename, $contents);
879: }
1.168 foxr 880: #
881: #
882: # Called to edit a configuration table file
1.167 foxr 883: # Parameters:
884: # request - The entire command/request sent by lonc or lonManage
885: # Return:
886: # The reply to send to the client.
1.168 foxr 887: #
1.167 foxr 888: sub EditFile {
889: my $request = shift;
890:
891: # Split the command into it's pieces: edit:filetype:script
892:
1.168 foxr 893: my ($request, $filetype, $script) = split(/:/, $request,3); # : in script
1.167 foxr 894:
895: # Check the pre-coditions for success:
896:
897: if($request != "edit") { # Something is amiss afoot alack.
898: return "error:edit request detected, but request != 'edit'\n";
899: }
900: if( ($filetype ne "hosts") &&
901: ($filetype ne "domain")) {
902: return "error:edit requested with invalid file specifier: $filetype \n";
903: }
904:
905: # Split the edit script and check it's validity.
1.168 foxr 906:
907: my @scriptlines = split(/\n/, $script); # one line per element.
908: my $linecount = scalar(@scriptlines);
909: for(my $i = 0; $i < $linecount; $i++) {
910: chomp($scriptlines[$i]);
911: if(!isValidEditCommand($scriptlines[$i])) {
912: return "error:edit with bad script line: '$scriptlines[$i]' \n";
913: }
914: }
1.145 foxr 915:
1.167 foxr 916: # Execute the edit operation.
1.169 foxr 917: # - Create a config file editor for the appropriate file and
918: # - execute each command in the script:
919: #
920: my $configfile = ConfigFileFromSelector($filetype);
921: if (!(defined $configfile)) {
922: return "refused\n";
923: }
924: my $editor = ConfigFileEdit->new($configfile);
1.167 foxr 925:
1.169 foxr 926: for (my $i = 0; $i < $linecount; $i++) {
927: ApplyEdit($scriptlines[$i], $editor);
928: }
929: # If the file is the host file, ensure that our host is
930: # adjusted to have our ip:
931: #
932: if($filetype eq "host") {
933: AdjustOurHost($editor);
934: }
935: # Finally replace the current file with our file.
936: #
937: ReplaceConfigFile($configfile, $editor);
1.167 foxr 938:
939: return "ok\n";
940: }
1.207 foxr 941:
1.255 foxr 942: # read_profile
943: #
944: # Returns a set of specific entries from a user's profile file.
945: # this is a utility function that is used by both get_profile_entry and
946: # get_profile_entry_encrypted.
947: #
948: # Parameters:
949: # udom - Domain in which the user exists.
950: # uname - User's account name (loncapa account)
951: # namespace - The profile namespace to open.
952: # what - A set of & separated queries.
953: # Returns:
954: # If all ok: - The string that needs to be shipped back to the user.
955: # If failure - A string that starts with error: followed by the failure
956: # reason.. note that this probabyl gets shipped back to the
957: # user as well.
958: #
959: sub read_profile {
960: my ($udom, $uname, $namespace, $what) = @_;
961:
962: my $hashref = &tie_user_hash($udom, $uname, $namespace,
963: &GDBM_READER());
964: if ($hashref) {
965: my @queries=split(/\&/,$what);
966: my $qresult='';
967:
968: for (my $i=0;$i<=$#queries;$i++) {
969: $qresult.="$hashref->{$queries[$i]}&"; # Presumably failure gives empty string.
970: }
971: $qresult=~s/\&$//; # Remove trailing & from last lookup.
1.311 albertel 972: if (&untie_user_hash($hashref)) {
1.255 foxr 973: return $qresult;
974: } else {
975: return "error: ".($!+0)." untie (GDBM) Failed";
976: }
977: } else {
978: if ($!+0 == 2) {
979: return "error:No such file or GDBM reported bad block error";
980: } else {
981: return "error: ".($!+0)." tie (GDBM) Failed";
982: }
983: }
984:
985: }
1.214 foxr 986: #--------------------- Request Handlers --------------------------------------------
987: #
1.215 foxr 988: # By convention each request handler registers itself prior to the sub
989: # declaration:
1.214 foxr 990: #
991:
1.216 foxr 992: #++
993: #
1.214 foxr 994: # Handles ping requests.
995: # Parameters:
996: # $cmd - the actual keyword that invoked us.
997: # $tail - the tail of the request that invoked us.
998: # $replyfd- File descriptor connected to the client
999: # Implicit Inputs:
1000: # $currenthostid - Global variable that carries the name of the host we are
1001: # known as.
1002: # Returns:
1003: # 1 - Ok to continue processing.
1004: # 0 - Program should exit.
1005: # Side effects:
1006: # Reply information is sent to the client.
1007: sub ping_handler {
1008: my ($cmd, $tail, $client) = @_;
1009: Debug("$cmd $tail $client .. $currenthostid:");
1010:
1011: Reply( $client,"$currenthostid\n","$cmd:$tail");
1012:
1013: return 1;
1014: }
1015: ®ister_handler("ping", \&ping_handler, 0, 1, 1); # Ping unencoded, client or manager.
1016:
1.216 foxr 1017: #++
1.215 foxr 1018: #
1019: # Handles pong requests. Pong replies with our current host id, and
1020: # the results of a ping sent to us via our lonc.
1021: #
1022: # Parameters:
1023: # $cmd - the actual keyword that invoked us.
1024: # $tail - the tail of the request that invoked us.
1025: # $replyfd- File descriptor connected to the client
1026: # Implicit Inputs:
1027: # $currenthostid - Global variable that carries the name of the host we are
1028: # connected to.
1029: # Returns:
1030: # 1 - Ok to continue processing.
1031: # 0 - Program should exit.
1032: # Side effects:
1033: # Reply information is sent to the client.
1034: sub pong_handler {
1035: my ($cmd, $tail, $replyfd) = @_;
1036:
1037: my $reply=&reply("ping",$clientname);
1038: &Reply( $replyfd, "$currenthostid:$reply\n", "$cmd:$tail");
1039: return 1;
1040: }
1041: ®ister_handler("pong", \&pong_handler, 0, 1, 1); # Pong unencoded, client or manager
1042:
1.216 foxr 1043: #++
1044: # Called to establish an encrypted session key with the remote client.
1045: # Note that with secure lond, in most cases this function is never
1046: # invoked. Instead, the secure session key is established either
1047: # via a local file that's locked down tight and only lives for a short
1048: # time, or via an ssl tunnel...and is generated from a bunch-o-random
1049: # bits from /dev/urandom, rather than the predictable pattern used by
1050: # by this sub. This sub is only used in the old-style insecure
1051: # key negotiation.
1052: # Parameters:
1053: # $cmd - the actual keyword that invoked us.
1054: # $tail - the tail of the request that invoked us.
1055: # $replyfd- File descriptor connected to the client
1056: # Implicit Inputs:
1057: # $currenthostid - Global variable that carries the name of the host
1058: # known as.
1059: # $clientname - Global variable that carries the name of the hsot we're connected to.
1060: # Returns:
1061: # 1 - Ok to continue processing.
1062: # 0 - Program should exit.
1063: # Implicit Outputs:
1064: # Reply information is sent to the client.
1065: # $cipher is set with a reference to a new IDEA encryption object.
1066: #
1067: sub establish_key_handler {
1068: my ($cmd, $tail, $replyfd) = @_;
1069:
1070: my $buildkey=time.$$.int(rand 100000);
1071: $buildkey=~tr/1-6/A-F/;
1072: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
1073: my $key=$currenthostid.$clientname;
1074: $key=~tr/a-z/A-Z/;
1075: $key=~tr/G-P/0-9/;
1076: $key=~tr/Q-Z/0-9/;
1077: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
1078: $key=substr($key,0,32);
1079: my $cipherkey=pack("H32",$key);
1080: $cipher=new IDEA $cipherkey;
1081: &Reply($replyfd, "$buildkey\n", "$cmd:$tail");
1082:
1083: return 1;
1084:
1085: }
1086: ®ister_handler("ekey", \&establish_key_handler, 0, 1,1);
1087:
1.217 foxr 1088: # Handler for the load command. Returns the current system load average
1089: # to the requestor.
1090: #
1091: # Parameters:
1092: # $cmd - the actual keyword that invoked us.
1093: # $tail - the tail of the request that invoked us.
1094: # $replyfd- File descriptor connected to the client
1095: # Implicit Inputs:
1096: # $currenthostid - Global variable that carries the name of the host
1097: # known as.
1098: # $clientname - Global variable that carries the name of the hsot we're connected to.
1099: # Returns:
1100: # 1 - Ok to continue processing.
1101: # 0 - Program should exit.
1102: # Side effects:
1103: # Reply information is sent to the client.
1104: sub load_handler {
1105: my ($cmd, $tail, $replyfd) = @_;
1106:
1107: # Get the load average from /proc/loadavg and calculate it as a percentage of
1108: # the allowed load limit as set by the perl global variable lonLoadLim
1109:
1110: my $loadavg;
1111: my $loadfile=IO::File->new('/proc/loadavg');
1112:
1113: $loadavg=<$loadfile>;
1114: $loadavg =~ s/\s.*//g; # Extract the first field only.
1115:
1116: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1117:
1118: &Reply( $replyfd, "$loadpercent\n", "$cmd:$tail");
1119:
1120: return 1;
1121: }
1.263 albertel 1122: ®ister_handler("load", \&load_handler, 0, 1, 0);
1.217 foxr 1123:
1124: #
1125: # Process the userload request. This sub returns to the client the current
1126: # user load average. It can be invoked either by clients or managers.
1127: #
1128: # Parameters:
1129: # $cmd - the actual keyword that invoked us.
1130: # $tail - the tail of the request that invoked us.
1131: # $replyfd- File descriptor connected to the client
1132: # Implicit Inputs:
1133: # $currenthostid - Global variable that carries the name of the host
1134: # known as.
1135: # $clientname - Global variable that carries the name of the hsot we're connected to.
1136: # Returns:
1137: # 1 - Ok to continue processing.
1138: # 0 - Program should exit
1139: # Implicit inputs:
1140: # whatever the userload() function requires.
1141: # Implicit outputs:
1142: # the reply is written to the client.
1143: #
1144: sub user_load_handler {
1145: my ($cmd, $tail, $replyfd) = @_;
1146:
1147: my $userloadpercent=&userload();
1148: &Reply($replyfd, "$userloadpercent\n", "$cmd:$tail");
1149:
1150: return 1;
1151: }
1.263 albertel 1152: ®ister_handler("userload", \&user_load_handler, 0, 1, 0);
1.217 foxr 1153:
1.218 foxr 1154: # Process a request for the authorization type of a user:
1155: # (userauth).
1156: #
1157: # Parameters:
1158: # $cmd - the actual keyword that invoked us.
1159: # $tail - the tail of the request that invoked us.
1160: # $replyfd- File descriptor connected to the client
1161: # Returns:
1162: # 1 - Ok to continue processing.
1163: # 0 - Program should exit
1164: # Implicit outputs:
1165: # The user authorization type is written to the client.
1166: #
1167: sub user_authorization_type {
1168: my ($cmd, $tail, $replyfd) = @_;
1169:
1170: my $userinput = "$cmd:$tail";
1171:
1172: # Pull the domain and username out of the command tail.
1.222 foxr 1173: # and call get_auth_type to determine the authentication type.
1.218 foxr 1174:
1175: my ($udom,$uname)=split(/:/,$tail);
1.222 foxr 1176: my $result = &get_auth_type($udom, $uname);
1.218 foxr 1177: if($result eq "nouser") {
1178: &Failure( $replyfd, "unknown_user\n", $userinput);
1179: } else {
1180: #
1.222 foxr 1181: # We only want to pass the second field from get_auth_type
1.218 foxr 1182: # for ^krb.. otherwise we'll be handing out the encrypted
1183: # password for internals e.g.
1184: #
1185: my ($type,$otherinfo) = split(/:/,$result);
1186: if($type =~ /^krb/) {
1187: $type = $result;
1.269 raeburn 1188: } else {
1189: $type .= ':';
1190: }
1191: &Reply( $replyfd, "$type\n", $userinput);
1.218 foxr 1192: }
1193:
1194: return 1;
1195: }
1196: ®ister_handler("currentauth", \&user_authorization_type, 1, 1, 0);
1197:
1198: # Process a request by a manager to push a hosts or domain table
1199: # to us. We pick apart the command and pass it on to the subs
1200: # that already exist to do this.
1201: #
1202: # Parameters:
1203: # $cmd - the actual keyword that invoked us.
1204: # $tail - the tail of the request that invoked us.
1205: # $client - File descriptor connected to the client
1206: # Returns:
1207: # 1 - Ok to continue processing.
1208: # 0 - Program should exit
1209: # Implicit Output:
1210: # a reply is written to the client.
1211: sub push_file_handler {
1212: my ($cmd, $tail, $client) = @_;
1213:
1214: my $userinput = "$cmd:$tail";
1215:
1216: # At this time we only know that the IP of our partner is a valid manager
1217: # the code below is a hook to do further authentication (e.g. to resolve
1218: # spoofing).
1219:
1220: my $cert = &GetCertificate($userinput);
1221: if(&ValidManager($cert)) {
1222:
1223: # Now presumably we have the bona fides of both the peer host and the
1224: # process making the request.
1225:
1226: my $reply = &PushFile($userinput);
1227: &Reply($client, "$reply\n", $userinput);
1228:
1229: } else {
1230: &Failure( $client, "refused\n", $userinput);
1231: }
1.219 foxr 1232: return 1;
1.218 foxr 1233: }
1234: ®ister_handler("pushfile", \&push_file_handler, 1, 0, 1);
1235:
1.243 banghart 1236: #
1237: # du - list the disk usuage of a directory recursively.
1238: #
1239: # note: stolen code from the ls file handler
1240: # under construction by Rick Banghart
1241: # .
1242: # Parameters:
1243: # $cmd - The command that dispatched us (du).
1244: # $ududir - The directory path to list... I'm not sure what this
1245: # is relative as things like ls:. return e.g.
1246: # no_such_dir.
1247: # $client - Socket open on the client.
1248: # Returns:
1249: # 1 - indicating that the daemon should not disconnect.
1250: # Side Effects:
1251: # The reply is written to $client.
1252: #
1253: sub du_handler {
1254: my ($cmd, $ududir, $client) = @_;
1.251 foxr 1255: my ($ududir) = split(/:/,$ududir); # Make 'telnet' testing easier.
1256: my $userinput = "$cmd:$ududir";
1257:
1.245 albertel 1258: if ($ududir=~/\.\./ || $ududir!~m|^/home/httpd/|) {
1259: &Failure($client,"refused\n","$cmd:$ududir");
1260: return 1;
1261: }
1.249 foxr 1262: # Since $ududir could have some nasties in it,
1263: # we will require that ududir is a valid
1264: # directory. Just in case someone tries to
1265: # slip us a line like .;(cd /home/httpd rm -rf*)
1266: # etc.
1267: #
1268: if (-d $ududir) {
1.292 albertel 1269: my $total_size=0;
1270: my $code=sub {
1271: if ($_=~/\.\d+\./) { return;}
1272: if ($_=~/\.meta$/) { return;}
1273: $total_size+=(stat($_))[7];
1274: };
1.295 raeburn 1275: chdir($ududir);
1.292 albertel 1276: find($code,$ududir);
1277: $total_size=int($total_size/1024);
1278: &Reply($client,"$total_size\n","$cmd:$ududir");
1.249 foxr 1279: } else {
1.251 foxr 1280: &Failure($client, "bad_directory:$ududir\n","$cmd:$ududir");
1.249 foxr 1281: }
1.243 banghart 1282: return 1;
1283: }
1284: ®ister_handler("du", \&du_handler, 0, 1, 0);
1.218 foxr 1285:
1.239 foxr 1286: #
1.280 matthew 1287: # The ls_handler routine should be considered obosolete and is retained
1288: # for communication with legacy servers. Please see the ls2_handler.
1289: #
1.239 foxr 1290: # ls - list the contents of a directory. For each file in the
1291: # selected directory the filename followed by the full output of
1292: # the stat function is returned. The returned info for each
1293: # file are separated by ':'. The stat fields are separated by &'s.
1294: # Parameters:
1295: # $cmd - The command that dispatched us (ls).
1296: # $ulsdir - The directory path to list... I'm not sure what this
1297: # is relative as things like ls:. return e.g.
1298: # no_such_dir.
1299: # $client - Socket open on the client.
1300: # Returns:
1301: # 1 - indicating that the daemon should not disconnect.
1302: # Side Effects:
1303: # The reply is written to $client.
1304: #
1305: sub ls_handler {
1.280 matthew 1306: # obsoleted by ls2_handler
1.239 foxr 1307: my ($cmd, $ulsdir, $client) = @_;
1308:
1309: my $userinput = "$cmd:$ulsdir";
1310:
1311: my $obs;
1312: my $rights;
1313: my $ulsout='';
1314: my $ulsfn;
1315: if (-e $ulsdir) {
1316: if(-d $ulsdir) {
1317: if (opendir(LSDIR,$ulsdir)) {
1318: while ($ulsfn=readdir(LSDIR)) {
1.291 albertel 1319: undef($obs);
1320: undef($rights);
1.239 foxr 1321: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1322: #We do some obsolete checking here
1323: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1324: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1325: my @obsolete=<FILE>;
1326: foreach my $obsolete (@obsolete) {
1.301 www 1327: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1.239 foxr 1328: if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
1329: }
1330: }
1331: $ulsout.=$ulsfn.'&'.join('&',@ulsstats);
1332: if($obs eq '1') { $ulsout.="&1"; }
1333: else { $ulsout.="&0"; }
1334: if($rights eq '1') { $ulsout.="&1:"; }
1335: else { $ulsout.="&0:"; }
1336: }
1337: closedir(LSDIR);
1338: }
1339: } else {
1340: my @ulsstats=stat($ulsdir);
1341: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1342: }
1343: } else {
1344: $ulsout='no_such_dir';
1345: }
1346: if ($ulsout eq '') { $ulsout='empty'; }
1.249 foxr 1347: &Reply($client, "$ulsout\n", $userinput); # This supports debug logging.
1.239 foxr 1348:
1349: return 1;
1350:
1351: }
1352: ®ister_handler("ls", \&ls_handler, 0, 1, 0);
1353:
1.280 matthew 1354: #
1355: # Please also see the ls_handler, which this routine obosolets.
1356: # ls2_handler differs from ls_handler in that it escapes its return
1357: # values before concatenating them together with ':'s.
1358: #
1359: # ls2 - list the contents of a directory. For each file in the
1360: # selected directory the filename followed by the full output of
1361: # the stat function is returned. The returned info for each
1362: # file are separated by ':'. The stat fields are separated by &'s.
1363: # Parameters:
1364: # $cmd - The command that dispatched us (ls).
1365: # $ulsdir - The directory path to list... I'm not sure what this
1366: # is relative as things like ls:. return e.g.
1367: # no_such_dir.
1368: # $client - Socket open on the client.
1369: # Returns:
1370: # 1 - indicating that the daemon should not disconnect.
1371: # Side Effects:
1372: # The reply is written to $client.
1373: #
1374: sub ls2_handler {
1375: my ($cmd, $ulsdir, $client) = @_;
1376:
1377: my $userinput = "$cmd:$ulsdir";
1378:
1379: my $obs;
1380: my $rights;
1381: my $ulsout='';
1382: my $ulsfn;
1383: if (-e $ulsdir) {
1384: if(-d $ulsdir) {
1385: if (opendir(LSDIR,$ulsdir)) {
1386: while ($ulsfn=readdir(LSDIR)) {
1.291 albertel 1387: undef($obs);
1388: undef($rights);
1.280 matthew 1389: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1390: #We do some obsolete checking here
1391: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1392: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1393: my @obsolete=<FILE>;
1394: foreach my $obsolete (@obsolete) {
1.301 www 1395: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1.280 matthew 1396: if($obsolete =~ m|(<copyright>)(default)|) {
1397: $rights = 1;
1398: }
1399: }
1400: }
1401: my $tmp = $ulsfn.'&'.join('&',@ulsstats);
1402: if ($obs eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1403: if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1404: $ulsout.= &escape($tmp).':';
1405: }
1406: closedir(LSDIR);
1407: }
1408: } else {
1409: my @ulsstats=stat($ulsdir);
1410: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1411: }
1412: } else {
1413: $ulsout='no_such_dir';
1414: }
1415: if ($ulsout eq '') { $ulsout='empty'; }
1416: &Reply($client, "$ulsout\n", $userinput); # This supports debug logging.
1417: return 1;
1418: }
1419: ®ister_handler("ls2", \&ls2_handler, 0, 1, 0);
1420:
1.218 foxr 1421: # Process a reinit request. Reinit requests that either
1422: # lonc or lond be reinitialized so that an updated
1423: # host.tab or domain.tab can be processed.
1424: #
1425: # Parameters:
1426: # $cmd - the actual keyword that invoked us.
1427: # $tail - the tail of the request that invoked us.
1428: # $client - File descriptor connected to the client
1429: # Returns:
1430: # 1 - Ok to continue processing.
1431: # 0 - Program should exit
1432: # Implicit output:
1433: # a reply is sent to the client.
1434: #
1435: sub reinit_process_handler {
1436: my ($cmd, $tail, $client) = @_;
1437:
1438: my $userinput = "$cmd:$tail";
1439:
1440: my $cert = &GetCertificate($userinput);
1441: if(&ValidManager($cert)) {
1442: chomp($userinput);
1443: my $reply = &ReinitProcess($userinput);
1444: &Reply( $client, "$reply\n", $userinput);
1445: } else {
1446: &Failure( $client, "refused\n", $userinput);
1447: }
1448: return 1;
1449: }
1450: ®ister_handler("reinit", \&reinit_process_handler, 1, 0, 1);
1451:
1452: # Process the editing script for a table edit operation.
1453: # the editing operation must be encrypted and requested by
1454: # a manager host.
1455: #
1456: # Parameters:
1457: # $cmd - the actual keyword that invoked us.
1458: # $tail - the tail of the request that invoked us.
1459: # $client - File descriptor connected to the client
1460: # Returns:
1461: # 1 - Ok to continue processing.
1462: # 0 - Program should exit
1463: # Implicit output:
1464: # a reply is sent to the client.
1465: #
1466: sub edit_table_handler {
1467: my ($command, $tail, $client) = @_;
1468:
1469: my $userinput = "$command:$tail";
1470:
1471: my $cert = &GetCertificate($userinput);
1472: if(&ValidManager($cert)) {
1473: my($filetype, $script) = split(/:/, $tail);
1474: if (($filetype eq "hosts") ||
1475: ($filetype eq "domain")) {
1476: if($script ne "") {
1477: &Reply($client, # BUGBUG - EditFile
1478: &EditFile($userinput), # could fail.
1479: $userinput);
1480: } else {
1481: &Failure($client,"refused\n",$userinput);
1482: }
1483: } else {
1484: &Failure($client,"refused\n",$userinput);
1485: }
1486: } else {
1487: &Failure($client,"refused\n",$userinput);
1488: }
1489: return 1;
1490: }
1.263 albertel 1491: ®ister_handler("edit", \&edit_table_handler, 1, 0, 1);
1.218 foxr 1492:
1.220 foxr 1493: #
1494: # Authenticate a user against the LonCAPA authentication
1495: # database. Note that there are several authentication
1496: # possibilities:
1497: # - unix - The user can be authenticated against the unix
1498: # password file.
1499: # - internal - The user can be authenticated against a purely
1500: # internal per user password file.
1501: # - kerberos - The user can be authenticated against either a kerb4 or kerb5
1502: # ticket granting authority.
1503: # - user - The person tailoring LonCAPA can supply a user authentication
1504: # mechanism that is per system.
1505: #
1506: # Parameters:
1507: # $cmd - The command that got us here.
1508: # $tail - Tail of the command (remaining parameters).
1509: # $client - File descriptor connected to client.
1510: # Returns
1511: # 0 - Requested to exit, caller should shut down.
1512: # 1 - Continue processing.
1513: # Implicit inputs:
1514: # The authentication systems describe above have their own forms of implicit
1515: # input into the authentication process that are described above.
1516: #
1517: sub authenticate_handler {
1518: my ($cmd, $tail, $client) = @_;
1519:
1520:
1521: # Regenerate the full input line
1522:
1523: my $userinput = $cmd.":".$tail;
1524:
1525: # udom - User's domain.
1526: # uname - Username.
1527: # upass - User's password.
1528:
1529: my ($udom,$uname,$upass)=split(/:/,$tail);
1530: &Debug(" Authenticate domain = $udom, user = $uname, password = $upass");
1531: chomp($upass);
1532: $upass=&unescape($upass);
1533:
1534: my $pwdcorrect = &validate_user($udom, $uname, $upass);
1535: if($pwdcorrect) {
1536: &Reply( $client, "authorized\n", $userinput);
1537: #
1538: # Bad credentials: Failed to authorize
1539: #
1540: } else {
1541: &Failure( $client, "non_authorized\n", $userinput);
1542: }
1543:
1544: return 1;
1545: }
1.263 albertel 1546: ®ister_handler("auth", \&authenticate_handler, 1, 1, 0);
1.214 foxr 1547:
1.222 foxr 1548: #
1549: # Change a user's password. Note that this function is complicated by
1550: # the fact that a user may be authenticated in more than one way:
1551: # At present, we are not able to change the password for all types of
1552: # authentication methods. Only for:
1553: # unix - unix password or shadow passoword style authentication.
1554: # local - Locally written authentication mechanism.
1555: # For now, kerb4 and kerb5 password changes are not supported and result
1556: # in an error.
1557: # FUTURE WORK:
1558: # Support kerberos passwd changes?
1559: # Parameters:
1560: # $cmd - The command that got us here.
1561: # $tail - Tail of the command (remaining parameters).
1562: # $client - File descriptor connected to client.
1563: # Returns
1564: # 0 - Requested to exit, caller should shut down.
1565: # 1 - Continue processing.
1566: # Implicit inputs:
1567: # The authentication systems describe above have their own forms of implicit
1568: # input into the authentication process that are described above.
1569: sub change_password_handler {
1570: my ($cmd, $tail, $client) = @_;
1571:
1572: my $userinput = $cmd.":".$tail; # Reconstruct client's string.
1573:
1574: #
1575: # udom - user's domain.
1576: # uname - Username.
1577: # upass - Current password.
1578: # npass - New password.
1579:
1580: my ($udom,$uname,$upass,$npass)=split(/:/,$tail);
1581:
1582: $upass=&unescape($upass);
1583: $npass=&unescape($npass);
1584: &Debug("Trying to change password for $uname");
1585:
1586: # First require that the user can be authenticated with their
1587: # old password:
1588:
1589: my $validated = &validate_user($udom, $uname, $upass);
1590: if($validated) {
1591: my $realpasswd = &get_auth_type($udom, $uname); # Defined since authd.
1592:
1593: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1594: if ($howpwd eq 'internal') {
1595: &Debug("internal auth");
1596: my $salt=time;
1597: $salt=substr($salt,6,2);
1598: my $ncpass=crypt($npass,$salt);
1599: if(&rewrite_password_file($udom, $uname, "internal:$ncpass")) {
1600: &logthis("Result of password change for "
1601: ."$uname: pwchange_success");
1602: &Reply($client, "ok\n", $userinput);
1603: } else {
1604: &logthis("Unable to open $uname passwd "
1605: ."to change password");
1606: &Failure( $client, "non_authorized\n",$userinput);
1607: }
1608: } elsif ($howpwd eq 'unix') {
1.287 foxr 1609: my $result = &change_unix_password($uname, $npass);
1.222 foxr 1610: &logthis("Result of password change for $uname: ".
1.287 foxr 1611: $result);
1.222 foxr 1612: &Reply($client, "$result\n", $userinput);
1613: } else {
1614: # this just means that the current password mode is not
1615: # one we know how to change (e.g the kerberos auth modes or
1616: # locally written auth handler).
1617: #
1618: &Failure( $client, "auth_mode_error\n", $userinput);
1619: }
1620:
1.224 foxr 1621: } else {
1.222 foxr 1622: &Failure( $client, "non_authorized\n", $userinput);
1623: }
1624:
1625: return 1;
1626: }
1.263 albertel 1627: ®ister_handler("passwd", \&change_password_handler, 1, 1, 0);
1.222 foxr 1628:
1.225 foxr 1629: #
1630: # Create a new user. User in this case means a lon-capa user.
1631: # The user must either already exist in some authentication realm
1632: # like kerberos or the /etc/passwd. If not, a user completely local to
1633: # this loncapa system is created.
1634: #
1635: # Parameters:
1636: # $cmd - The command that got us here.
1637: # $tail - Tail of the command (remaining parameters).
1638: # $client - File descriptor connected to client.
1639: # Returns
1640: # 0 - Requested to exit, caller should shut down.
1641: # 1 - Continue processing.
1642: # Implicit inputs:
1643: # The authentication systems describe above have their own forms of implicit
1644: # input into the authentication process that are described above.
1645: sub add_user_handler {
1646:
1647: my ($cmd, $tail, $client) = @_;
1648:
1649:
1650: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
1651: my $userinput = $cmd.":".$tail; # Reconstruct the full request line.
1652:
1653: &Debug("cmd =".$cmd." $udom =".$udom." uname=".$uname);
1654:
1655:
1656: if($udom eq $currentdomainid) { # Reject new users for other domains...
1657:
1658: my $oldumask=umask(0077);
1659: chomp($npass);
1660: $npass=&unescape($npass);
1661: my $passfilename = &password_path($udom, $uname);
1662: &Debug("Password file created will be:".$passfilename);
1663: if (-e $passfilename) {
1664: &Failure( $client, "already_exists\n", $userinput);
1665: } else {
1666: my $fperror='';
1.264 albertel 1667: if (!&mkpath($passfilename)) {
1668: $fperror="error: ".($!+0)." mkdir failed while attempting "
1669: ."makeuser";
1.225 foxr 1670: }
1671: unless ($fperror) {
1672: my $result=&make_passwd_file($uname, $umode,$npass, $passfilename);
1673: &Reply($client, $result, $userinput); #BUGBUG - could be fail
1674: } else {
1675: &Failure($client, "$fperror\n", $userinput);
1676: }
1677: }
1678: umask($oldumask);
1679: } else {
1680: &Failure($client, "not_right_domain\n",
1681: $userinput); # Even if we are multihomed.
1682:
1683: }
1684: return 1;
1685:
1686: }
1687: ®ister_handler("makeuser", \&add_user_handler, 1, 1, 0);
1688:
1689: #
1690: # Change the authentication method of a user. Note that this may
1691: # also implicitly change the user's password if, for example, the user is
1692: # joining an existing authentication realm. Known authentication realms at
1693: # this time are:
1694: # internal - Purely internal password file (only loncapa knows this user)
1695: # local - Institutionally written authentication module.
1696: # unix - Unix user (/etc/passwd with or without /etc/shadow).
1697: # kerb4 - kerberos version 4
1698: # kerb5 - kerberos version 5
1699: #
1700: # Parameters:
1701: # $cmd - The command that got us here.
1702: # $tail - Tail of the command (remaining parameters).
1703: # $client - File descriptor connected to client.
1704: # Returns
1705: # 0 - Requested to exit, caller should shut down.
1706: # 1 - Continue processing.
1707: # Implicit inputs:
1708: # The authentication systems describe above have their own forms of implicit
1709: # input into the authentication process that are described above.
1.287 foxr 1710: # NOTE:
1711: # This is also used to change the authentication credential values (e.g. passwd).
1712: #
1.225 foxr 1713: #
1714: sub change_authentication_handler {
1715:
1716: my ($cmd, $tail, $client) = @_;
1717:
1718: my $userinput = "$cmd:$tail"; # Reconstruct user input.
1719:
1720: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
1721: &Debug("cmd = ".$cmd." domain= ".$udom."uname =".$uname." umode= ".$umode);
1722: if ($udom ne $currentdomainid) {
1723: &Failure( $client, "not_right_domain\n", $client);
1724: } else {
1725:
1726: chomp($npass);
1727:
1728: $npass=&unescape($npass);
1.261 foxr 1729: my $oldauth = &get_auth_type($udom, $uname); # Get old auth info.
1.225 foxr 1730: my $passfilename = &password_path($udom, $uname);
1731: if ($passfilename) { # Not allowed to create a new user!!
1.287 foxr 1732: # If just changing the unix passwd. need to arrange to run
1733: # passwd since otherwise make_passwd_file will run
1734: # lcuseradd which fails if an account already exists
1735: # (to prevent an unscrupulous LONCAPA admin from stealing
1736: # an existing account by overwriting it as a LonCAPA account).
1737:
1738: if(($oldauth =~/^unix/) && ($umode eq "unix")) {
1739: my $result = &change_unix_password($uname, $npass);
1740: &logthis("Result of password change for $uname: ".$result);
1741: if ($result eq "ok") {
1742: &Reply($client, "$result\n")
1.288 albertel 1743: } else {
1.287 foxr 1744: &Failure($client, "$result\n");
1745: }
1.288 albertel 1746: } else {
1.287 foxr 1747: my $result=&make_passwd_file($uname, $umode,$npass,$passfilename);
1748: #
1749: # If the current auth mode is internal, and the old auth mode was
1750: # unix, or krb*, and the user is an author for this domain,
1751: # re-run manage_permissions for that role in order to be able
1752: # to take ownership of the construction space back to www:www
1753: #
1754:
1755:
1756: if( (($oldauth =~ /^unix/) && ($umode eq "internal")) ||
1757: (($oldauth =~ /^internal/) && ($umode eq "unix")) ) {
1758: if(&is_author($udom, $uname)) {
1759: &Debug(" Need to manage author permissions...");
1760: &manage_permissions("/$udom/_au", $udom, $uname, "$umode:");
1761: }
1.261 foxr 1762: }
1.287 foxr 1763: &Reply($client, $result, $userinput);
1.261 foxr 1764: }
1765:
1766:
1.225 foxr 1767: } else {
1.251 foxr 1768: &Failure($client, "non_authorized\n", $userinput); # Fail the user now.
1.225 foxr 1769: }
1770: }
1771: return 1;
1772: }
1773: ®ister_handler("changeuserauth", \&change_authentication_handler, 1,1, 0);
1774:
1775: #
1776: # Determines if this is the home server for a user. The home server
1777: # for a user will have his/her lon-capa passwd file. Therefore all we need
1778: # to do is determine if this file exists.
1779: #
1780: # Parameters:
1781: # $cmd - The command that got us here.
1782: # $tail - Tail of the command (remaining parameters).
1783: # $client - File descriptor connected to client.
1784: # Returns
1785: # 0 - Requested to exit, caller should shut down.
1786: # 1 - Continue processing.
1787: # Implicit inputs:
1788: # The authentication systems describe above have their own forms of implicit
1789: # input into the authentication process that are described above.
1790: #
1791: sub is_home_handler {
1792: my ($cmd, $tail, $client) = @_;
1793:
1794: my $userinput = "$cmd:$tail";
1795:
1796: my ($udom,$uname)=split(/:/,$tail);
1797: chomp($uname);
1798: my $passfile = &password_filename($udom, $uname);
1799: if($passfile) {
1800: &Reply( $client, "found\n", $userinput);
1801: } else {
1802: &Failure($client, "not_found\n", $userinput);
1803: }
1804: return 1;
1805: }
1806: ®ister_handler("home", \&is_home_handler, 0,1,0);
1807:
1808: #
1809: # Process an update request for a resource?? I think what's going on here is
1810: # that a resource has been modified that we hold a subscription to.
1811: # If the resource is not local, then we must update, or at least invalidate our
1812: # cached copy of the resource.
1813: # FUTURE WORK:
1814: # I need to look at this logic carefully. My druthers would be to follow
1815: # typical caching logic, and simple invalidate the cache, drop any subscription
1816: # an let the next fetch start the ball rolling again... however that may
1817: # actually be more difficult than it looks given the complex web of
1818: # proxy servers.
1819: # Parameters:
1820: # $cmd - The command that got us here.
1821: # $tail - Tail of the command (remaining parameters).
1822: # $client - File descriptor connected to client.
1823: # Returns
1824: # 0 - Requested to exit, caller should shut down.
1825: # 1 - Continue processing.
1826: # Implicit inputs:
1827: # The authentication systems describe above have their own forms of implicit
1828: # input into the authentication process that are described above.
1829: #
1830: sub update_resource_handler {
1831:
1832: my ($cmd, $tail, $client) = @_;
1833:
1834: my $userinput = "$cmd:$tail";
1835:
1836: my $fname= $tail; # This allows interactive testing
1837:
1838:
1839: my $ownership=ishome($fname);
1840: if ($ownership eq 'not_owner') {
1841: if (-e $fname) {
1842: my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
1843: $atime,$mtime,$ctime,$blksize,$blocks)=stat($fname);
1844: my $now=time;
1845: my $since=$now-$atime;
1846: if ($since>$perlvar{'lonExpire'}) {
1847: my $reply=&reply("unsub:$fname","$clientname");
1.308 albertel 1848: &devalidate_meta_cache($fname);
1.225 foxr 1849: unlink("$fname");
1.334 ! albertel 1850: unlink("$fname.meta");
1.225 foxr 1851: } else {
1852: my $transname="$fname.in.transfer";
1853: my $remoteurl=&reply("sub:$fname","$clientname");
1854: my $response;
1855: alarm(120);
1856: {
1857: my $ua=new LWP::UserAgent;
1858: my $request=new HTTP::Request('GET',"$remoteurl");
1859: $response=$ua->request($request,$transname);
1860: }
1861: alarm(0);
1862: if ($response->is_error()) {
1863: unlink($transname);
1864: my $message=$response->status_line;
1865: &logthis("LWP GET: $message for $fname ($remoteurl)");
1866: } else {
1867: if ($remoteurl!~/\.meta$/) {
1868: alarm(120);
1869: {
1870: my $ua=new LWP::UserAgent;
1871: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1872: my $mresponse=$ua->request($mrequest,$fname.'.meta');
1873: if ($mresponse->is_error()) {
1874: unlink($fname.'.meta');
1875: }
1876: }
1877: alarm(0);
1878: }
1879: rename($transname,$fname);
1.308 albertel 1880: &devalidate_meta_cache($fname);
1.225 foxr 1881: }
1882: }
1883: &Reply( $client, "ok\n", $userinput);
1884: } else {
1885: &Failure($client, "not_found\n", $userinput);
1886: }
1887: } else {
1888: &Failure($client, "rejected\n", $userinput);
1889: }
1890: return 1;
1891: }
1892: ®ister_handler("update", \&update_resource_handler, 0 ,1, 0);
1893:
1.308 albertel 1894: sub devalidate_meta_cache {
1895: my ($url) = @_;
1896: use Cache::Memcached;
1897: my $memcache = new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
1898: $url = &declutter($url);
1899: $url =~ s-\.meta$--;
1900: my $id = &escape('meta:'.$url);
1901: $memcache->delete($id);
1902: }
1903:
1904: sub declutter {
1905: my $thisfn=shift;
1906: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
1907: $thisfn=~s/^\///;
1908: $thisfn=~s|^adm/wrapper/||;
1909: $thisfn=~s|^adm/coursedocs/showdoc/||;
1910: $thisfn=~s/^res\///;
1911: $thisfn=~s/\?.+$//;
1912: return $thisfn;
1913: }
1.225 foxr 1914: #
1.226 foxr 1915: # Fetch a user file from a remote server to the user's home directory
1916: # userfiles subdir.
1.225 foxr 1917: # Parameters:
1918: # $cmd - The command that got us here.
1919: # $tail - Tail of the command (remaining parameters).
1920: # $client - File descriptor connected to client.
1921: # Returns
1922: # 0 - Requested to exit, caller should shut down.
1923: # 1 - Continue processing.
1924: #
1925: sub fetch_user_file_handler {
1926:
1927: my ($cmd, $tail, $client) = @_;
1928:
1929: my $userinput = "$cmd:$tail";
1930: my $fname = $tail;
1.232 foxr 1931: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
1.225 foxr 1932: my $udir=&propath($udom,$uname).'/userfiles';
1933: unless (-e $udir) {
1934: mkdir($udir,0770);
1935: }
1.232 foxr 1936: Debug("fetch user file for $fname");
1.225 foxr 1937: if (-e $udir) {
1938: $ufile=~s/^[\.\~]+//;
1.232 foxr 1939:
1940: # IF necessary, create the path right down to the file.
1941: # Note that any regular files in the way of this path are
1942: # wiped out to deal with some earlier folly of mine.
1943:
1.267 raeburn 1944: if (!&mkpath($udir.'/'.$ufile)) {
1.264 albertel 1945: &Failure($client, "unable_to_create\n", $userinput);
1.232 foxr 1946: }
1947:
1.225 foxr 1948: my $destname=$udir.'/'.$ufile;
1949: my $transname=$udir.'/'.$ufile.'.in.transit';
1950: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
1951: my $response;
1.232 foxr 1952: Debug("Remote URL : $remoteurl Transfername $transname Destname: $destname");
1.225 foxr 1953: alarm(120);
1954: {
1955: my $ua=new LWP::UserAgent;
1956: my $request=new HTTP::Request('GET',"$remoteurl");
1957: $response=$ua->request($request,$transname);
1958: }
1959: alarm(0);
1960: if ($response->is_error()) {
1961: unlink($transname);
1962: my $message=$response->status_line;
1963: &logthis("LWP GET: $message for $fname ($remoteurl)");
1964: &Failure($client, "failed\n", $userinput);
1965: } else {
1.232 foxr 1966: Debug("Renaming $transname to $destname");
1.225 foxr 1967: if (!rename($transname,$destname)) {
1968: &logthis("Unable to move $transname to $destname");
1969: unlink($transname);
1970: &Failure($client, "failed\n", $userinput);
1971: } else {
1972: &Reply($client, "ok\n", $userinput);
1973: }
1974: }
1975: } else {
1976: &Failure($client, "not_home\n", $userinput);
1977: }
1978: return 1;
1979: }
1980: ®ister_handler("fetchuserfile", \&fetch_user_file_handler, 0, 1, 0);
1981:
1.226 foxr 1982: #
1983: # Remove a file from a user's home directory userfiles subdirectory.
1984: # Parameters:
1985: # cmd - the Lond request keyword that got us here.
1986: # tail - the part of the command past the keyword.
1987: # client- File descriptor connected with the client.
1988: #
1989: # Returns:
1990: # 1 - Continue processing.
1991: sub remove_user_file_handler {
1992: my ($cmd, $tail, $client) = @_;
1993:
1994: my ($fname) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
1995:
1996: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
1997: if ($ufile =~m|/\.\./|) {
1998: # any files paths with /../ in them refuse
1999: # to deal with
2000: &Failure($client, "refused\n", "$cmd:$tail");
2001: } else {
2002: my $udir = &propath($udom,$uname);
2003: if (-e $udir) {
2004: my $file=$udir.'/userfiles/'.$ufile;
2005: if (-e $file) {
1.253 foxr 2006: #
2007: # If the file is a regular file unlink is fine...
2008: # However it's possible the client wants a dir.
2009: # removed, in which case rmdir is more approprate:
2010: #
1.240 banghart 2011: if (-f $file){
1.241 albertel 2012: unlink($file);
2013: } elsif(-d $file) {
2014: rmdir($file);
1.240 banghart 2015: }
1.226 foxr 2016: if (-e $file) {
1.253 foxr 2017: # File is still there after we deleted it ?!?
2018:
1.226 foxr 2019: &Failure($client, "failed\n", "$cmd:$tail");
2020: } else {
2021: &Reply($client, "ok\n", "$cmd:$tail");
2022: }
2023: } else {
2024: &Failure($client, "not_found\n", "$cmd:$tail");
2025: }
2026: } else {
2027: &Failure($client, "not_home\n", "$cmd:$tail");
2028: }
2029: }
2030: return 1;
2031: }
2032: ®ister_handler("removeuserfile", \&remove_user_file_handler, 0,1,0);
2033:
1.236 albertel 2034: #
2035: # make a directory in a user's home directory userfiles subdirectory.
2036: # Parameters:
2037: # cmd - the Lond request keyword that got us here.
2038: # tail - the part of the command past the keyword.
2039: # client- File descriptor connected with the client.
2040: #
2041: # Returns:
2042: # 1 - Continue processing.
2043: sub mkdir_user_file_handler {
2044: my ($cmd, $tail, $client) = @_;
2045:
2046: my ($dir) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2047: $dir=&unescape($dir);
2048: my ($udom,$uname,$ufile) = ($dir =~ m|^([^/]+)/([^/]+)/(.+)$|);
2049: if ($ufile =~m|/\.\./|) {
2050: # any files paths with /../ in them refuse
2051: # to deal with
2052: &Failure($client, "refused\n", "$cmd:$tail");
2053: } else {
2054: my $udir = &propath($udom,$uname);
2055: if (-e $udir) {
1.264 albertel 2056: my $newdir=$udir.'/userfiles/'.$ufile.'/';
2057: if (!&mkpath($newdir)) {
2058: &Failure($client, "failed\n", "$cmd:$tail");
1.236 albertel 2059: }
1.264 albertel 2060: &Reply($client, "ok\n", "$cmd:$tail");
1.236 albertel 2061: } else {
2062: &Failure($client, "not_home\n", "$cmd:$tail");
2063: }
2064: }
2065: return 1;
2066: }
2067: ®ister_handler("mkdiruserfile", \&mkdir_user_file_handler, 0,1,0);
2068:
1.237 albertel 2069: #
2070: # rename a file in a user's home directory userfiles subdirectory.
2071: # Parameters:
2072: # cmd - the Lond request keyword that got us here.
2073: # tail - the part of the command past the keyword.
2074: # client- File descriptor connected with the client.
2075: #
2076: # Returns:
2077: # 1 - Continue processing.
2078: sub rename_user_file_handler {
2079: my ($cmd, $tail, $client) = @_;
2080:
2081: my ($udom,$uname,$old,$new) = split(/:/, $tail);
2082: $old=&unescape($old);
2083: $new=&unescape($new);
2084: if ($new =~m|/\.\./| || $old =~m|/\.\./|) {
2085: # any files paths with /../ in them refuse to deal with
2086: &Failure($client, "refused\n", "$cmd:$tail");
2087: } else {
2088: my $udir = &propath($udom,$uname);
2089: if (-e $udir) {
2090: my $oldfile=$udir.'/userfiles/'.$old;
2091: my $newfile=$udir.'/userfiles/'.$new;
2092: if (-e $newfile) {
2093: &Failure($client, "exists\n", "$cmd:$tail");
2094: } elsif (! -e $oldfile) {
2095: &Failure($client, "not_found\n", "$cmd:$tail");
2096: } else {
2097: if (!rename($oldfile,$newfile)) {
2098: &Failure($client, "failed\n", "$cmd:$tail");
2099: } else {
2100: &Reply($client, "ok\n", "$cmd:$tail");
2101: }
2102: }
2103: } else {
2104: &Failure($client, "not_home\n", "$cmd:$tail");
2105: }
2106: }
2107: return 1;
2108: }
2109: ®ister_handler("renameuserfile", \&rename_user_file_handler, 0,1,0);
2110:
1.227 foxr 2111: #
1.263 albertel 2112: # Authenticate access to a user file by checking that the token the user's
2113: # passed also exists in their session file
1.227 foxr 2114: #
2115: # Parameters:
2116: # cmd - The request keyword that dispatched to tus.
2117: # tail - The tail of the request (colon separated parameters).
2118: # client - Filehandle open on the client.
2119: # Return:
2120: # 1.
2121: sub token_auth_user_file_handler {
2122: my ($cmd, $tail, $client) = @_;
2123:
2124: my ($fname, $session) = split(/:/, $tail);
2125:
2126: chomp($session);
1.251 foxr 2127: my $reply="non_auth\n";
1.227 foxr 2128: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
2129: $session.'.id')) {
1.332 albertel 2130: flock(ENVIN,LOCK_SH);
1.227 foxr 2131: while (my $line=<ENVIN>) {
1.330 albertel 2132: my ($envname)=split(/=/,$line,2);
2133: $envname=&unescape($envname);
2134: if ($envname=~ m|^userfile\.\Q$fname\E|) { $reply="ok\n"; }
1.227 foxr 2135: }
2136: close(ENVIN);
1.251 foxr 2137: &Reply($client, $reply, "$cmd:$tail");
1.227 foxr 2138: } else {
2139: &Failure($client, "invalid_token\n", "$cmd:$tail");
2140: }
2141: return 1;
2142:
2143: }
2144: ®ister_handler("tokenauthuserfile", \&token_auth_user_file_handler, 0,1,0);
1.229 foxr 2145:
2146: #
2147: # Unsubscribe from a resource.
2148: #
2149: # Parameters:
2150: # $cmd - The command that got us here.
2151: # $tail - Tail of the command (remaining parameters).
2152: # $client - File descriptor connected to client.
2153: # Returns
2154: # 0 - Requested to exit, caller should shut down.
2155: # 1 - Continue processing.
2156: #
2157: sub unsubscribe_handler {
2158: my ($cmd, $tail, $client) = @_;
2159:
2160: my $userinput= "$cmd:$tail";
2161:
2162: my ($fname) = split(/:/,$tail); # Split in case there's extrs.
2163:
2164: &Debug("Unsubscribing $fname");
2165: if (-e $fname) {
2166: &Debug("Exists");
2167: &Reply($client, &unsub($fname,$clientip), $userinput);
2168: } else {
2169: &Failure($client, "not_found\n", $userinput);
2170: }
2171: return 1;
2172: }
2173: ®ister_handler("unsub", \&unsubscribe_handler, 0, 1, 0);
1.263 albertel 2174:
1.230 foxr 2175: # Subscribe to a resource
2176: #
2177: # Parameters:
2178: # $cmd - The command that got us here.
2179: # $tail - Tail of the command (remaining parameters).
2180: # $client - File descriptor connected to client.
2181: # Returns
2182: # 0 - Requested to exit, caller should shut down.
2183: # 1 - Continue processing.
2184: #
2185: sub subscribe_handler {
2186: my ($cmd, $tail, $client)= @_;
2187:
2188: my $userinput = "$cmd:$tail";
2189:
2190: &Reply( $client, &subscribe($userinput,$clientip), $userinput);
2191:
2192: return 1;
2193: }
2194: ®ister_handler("sub", \&subscribe_handler, 0, 1, 0);
2195:
2196: #
2197: # Determine the version of a resource (?) Or is it return
2198: # the top version of the resource? Not yet clear from the
2199: # code in currentversion.
2200: #
2201: # Parameters:
2202: # $cmd - The command that got us here.
2203: # $tail - Tail of the command (remaining parameters).
2204: # $client - File descriptor connected to client.
2205: # Returns
2206: # 0 - Requested to exit, caller should shut down.
2207: # 1 - Continue processing.
2208: #
2209: sub current_version_handler {
2210: my ($cmd, $tail, $client) = @_;
2211:
2212: my $userinput= "$cmd:$tail";
2213:
2214: my $fname = $tail;
2215: &Reply( $client, ¤tversion($fname)."\n", $userinput);
2216: return 1;
2217:
2218: }
2219: ®ister_handler("currentversion", \¤t_version_handler, 0, 1, 0);
2220:
2221: # Make an entry in a user's activity log.
2222: #
2223: # Parameters:
2224: # $cmd - The command that got us here.
2225: # $tail - Tail of the command (remaining parameters).
2226: # $client - File descriptor connected to client.
2227: # Returns
2228: # 0 - Requested to exit, caller should shut down.
2229: # 1 - Continue processing.
2230: #
2231: sub activity_log_handler {
2232: my ($cmd, $tail, $client) = @_;
2233:
2234:
2235: my $userinput= "$cmd:$tail";
2236:
2237: my ($udom,$uname,$what)=split(/:/,$tail);
2238: chomp($what);
2239: my $proname=&propath($udom,$uname);
2240: my $now=time;
2241: my $hfh;
2242: if ($hfh=IO::File->new(">>$proname/activity.log")) {
2243: print $hfh "$now:$clientname:$what\n";
2244: &Reply( $client, "ok\n", $userinput);
2245: } else {
2246: &Failure($client, "error: ".($!+0)." IO::File->new Failed "
2247: ."while attempting log\n",
2248: $userinput);
2249: }
2250:
2251: return 1;
2252: }
1.263 albertel 2253: ®ister_handler("log", \&activity_log_handler, 0, 1, 0);
1.230 foxr 2254:
2255: #
2256: # Put a namespace entry in a user profile hash.
2257: # My druthers would be for this to be an encrypted interaction too.
2258: # anything that might be an inadvertent covert channel about either
2259: # user authentication or user personal information....
2260: #
2261: # Parameters:
2262: # $cmd - The command that got us here.
2263: # $tail - Tail of the command (remaining parameters).
2264: # $client - File descriptor connected to client.
2265: # Returns
2266: # 0 - Requested to exit, caller should shut down.
2267: # 1 - Continue processing.
2268: #
2269: sub put_user_profile_entry {
2270: my ($cmd, $tail, $client) = @_;
1.229 foxr 2271:
1.230 foxr 2272: my $userinput = "$cmd:$tail";
2273:
1.242 raeburn 2274: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
1.230 foxr 2275: if ($namespace ne 'roles') {
2276: chomp($what);
2277: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2278: &GDBM_WRCREAT(),"P",$what);
2279: if($hashref) {
2280: my @pairs=split(/\&/,$what);
2281: foreach my $pair (@pairs) {
2282: my ($key,$value)=split(/=/,$pair);
2283: $hashref->{$key}=$value;
2284: }
1.311 albertel 2285: if (&untie_user_hash($hashref)) {
1.230 foxr 2286: &Reply( $client, "ok\n", $userinput);
2287: } else {
2288: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2289: "while attempting put\n",
2290: $userinput);
2291: }
2292: } else {
1.316 albertel 2293: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
1.230 foxr 2294: "while attempting put\n", $userinput);
2295: }
2296: } else {
2297: &Failure( $client, "refused\n", $userinput);
2298: }
2299:
2300: return 1;
2301: }
2302: ®ister_handler("put", \&put_user_profile_entry, 0, 1, 0);
2303:
1.283 albertel 2304: # Put a piece of new data in hash, returns error if entry already exists
2305: # Parameters:
2306: # $cmd - The command that got us here.
2307: # $tail - Tail of the command (remaining parameters).
2308: # $client - File descriptor connected to client.
2309: # Returns
2310: # 0 - Requested to exit, caller should shut down.
2311: # 1 - Continue processing.
2312: #
2313: sub newput_user_profile_entry {
2314: my ($cmd, $tail, $client) = @_;
2315:
2316: my $userinput = "$cmd:$tail";
2317:
2318: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
2319: if ($namespace eq 'roles') {
2320: &Failure( $client, "refused\n", $userinput);
2321: return 1;
2322: }
2323:
2324: chomp($what);
2325:
2326: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2327: &GDBM_WRCREAT(),"N",$what);
2328: if(!$hashref) {
1.316 albertel 2329: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
1.283 albertel 2330: "while attempting put\n", $userinput);
2331: return 1;
2332: }
2333:
2334: my @pairs=split(/\&/,$what);
2335: foreach my $pair (@pairs) {
2336: my ($key,$value)=split(/=/,$pair);
2337: if (exists($hashref->{$key})) {
2338: &Failure($client, "key_exists: ".$key."\n",$userinput);
2339: return 1;
2340: }
2341: }
2342:
2343: foreach my $pair (@pairs) {
2344: my ($key,$value)=split(/=/,$pair);
2345: $hashref->{$key}=$value;
2346: }
2347:
1.311 albertel 2348: if (&untie_user_hash($hashref)) {
1.283 albertel 2349: &Reply( $client, "ok\n", $userinput);
2350: } else {
2351: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2352: "while attempting put\n",
2353: $userinput);
2354: }
2355: return 1;
2356: }
2357: ®ister_handler("newput", \&newput_user_profile_entry, 0, 1, 0);
2358:
1.230 foxr 2359: #
2360: # Increment a profile entry in the user history file.
2361: # The history contains keyword value pairs. In this case,
2362: # The value itself is a pair of numbers. The first, the current value
2363: # the second an increment that this function applies to the current
2364: # value.
2365: #
2366: # Parameters:
2367: # $cmd - The command that got us here.
2368: # $tail - Tail of the command (remaining parameters).
2369: # $client - File descriptor connected to client.
2370: # Returns
2371: # 0 - Requested to exit, caller should shut down.
2372: # 1 - Continue processing.
2373: #
2374: sub increment_user_value_handler {
2375: my ($cmd, $tail, $client) = @_;
2376:
2377: my $userinput = "$cmd:$tail";
2378:
2379: my ($udom,$uname,$namespace,$what) =split(/:/,$tail);
2380: if ($namespace ne 'roles') {
2381: chomp($what);
2382: my $hashref = &tie_user_hash($udom, $uname,
2383: $namespace, &GDBM_WRCREAT(),
2384: "P",$what);
2385: if ($hashref) {
2386: my @pairs=split(/\&/,$what);
2387: foreach my $pair (@pairs) {
2388: my ($key,$value)=split(/=/,$pair);
1.284 raeburn 2389: $value = &unescape($value);
1.230 foxr 2390: # We could check that we have a number...
2391: if (! defined($value) || $value eq '') {
2392: $value = 1;
2393: }
2394: $hashref->{$key}+=$value;
1.284 raeburn 2395: if ($namespace eq 'nohist_resourcetracker') {
2396: if ($hashref->{$key} < 0) {
2397: $hashref->{$key} = 0;
2398: }
2399: }
1.230 foxr 2400: }
1.311 albertel 2401: if (&untie_user_hash($hashref)) {
1.230 foxr 2402: &Reply( $client, "ok\n", $userinput);
2403: } else {
2404: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2405: "while attempting inc\n", $userinput);
2406: }
2407: } else {
2408: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2409: "while attempting inc\n", $userinput);
2410: }
2411: } else {
2412: &Failure($client, "refused\n", $userinput);
2413: }
2414:
2415: return 1;
2416: }
2417: ®ister_handler("inc", \&increment_user_value_handler, 0, 1, 0);
2418:
2419: #
2420: # Put a new role for a user. Roles are LonCAPA's packaging of permissions.
2421: # Each 'role' a user has implies a set of permissions. Adding a new role
2422: # for a person grants the permissions packaged with that role
2423: # to that user when the role is selected.
2424: #
2425: # Parameters:
2426: # $cmd - The command string (rolesput).
2427: # $tail - The remainder of the request line. For rolesput this
2428: # consists of a colon separated list that contains:
2429: # The domain and user that is granting the role (logged).
2430: # The domain and user that is getting the role.
2431: # The roles being granted as a set of & separated pairs.
2432: # each pair a key value pair.
2433: # $client - File descriptor connected to the client.
2434: # Returns:
2435: # 0 - If the daemon should exit
2436: # 1 - To continue processing.
2437: #
2438: #
2439: sub roles_put_handler {
2440: my ($cmd, $tail, $client) = @_;
2441:
2442: my $userinput = "$cmd:$tail";
2443:
2444: my ( $exedom, $exeuser, $udom, $uname, $what) = split(/:/,$tail);
2445:
2446:
2447: my $namespace='roles';
2448: chomp($what);
2449: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2450: &GDBM_WRCREAT(), "P",
2451: "$exedom:$exeuser:$what");
2452: #
2453: # Log the attempt to set a role. The {}'s here ensure that the file
2454: # handle is open for the minimal amount of time. Since the flush
2455: # is done on close this improves the chances the log will be an un-
2456: # corrupted ordered thing.
2457: if ($hashref) {
1.261 foxr 2458: my $pass_entry = &get_auth_type($udom, $uname);
2459: my ($auth_type,$pwd) = split(/:/, $pass_entry);
2460: $auth_type = $auth_type.":";
1.230 foxr 2461: my @pairs=split(/\&/,$what);
2462: foreach my $pair (@pairs) {
2463: my ($key,$value)=split(/=/,$pair);
2464: &manage_permissions($key, $udom, $uname,
1.260 foxr 2465: $auth_type);
1.230 foxr 2466: $hashref->{$key}=$value;
2467: }
1.311 albertel 2468: if (&untie_user_hash($hashref)) {
1.230 foxr 2469: &Reply($client, "ok\n", $userinput);
2470: } else {
2471: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2472: "while attempting rolesput\n", $userinput);
2473: }
2474: } else {
2475: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2476: "while attempting rolesput\n", $userinput);
2477: }
2478: return 1;
2479: }
2480: ®ister_handler("rolesput", \&roles_put_handler, 1,1,0); # Encoded client only.
2481:
2482: #
1.231 foxr 2483: # Deletes (removes) a role for a user. This is equivalent to removing
2484: # a permissions package associated with the role from the user's profile.
2485: #
2486: # Parameters:
2487: # $cmd - The command (rolesdel)
2488: # $tail - The remainder of the request line. This consists
2489: # of:
2490: # The domain and user requesting the change (logged)
2491: # The domain and user being changed.
2492: # The roles being revoked. These are shipped to us
2493: # as a bunch of & separated role name keywords.
2494: # $client - The file handle open on the client.
2495: # Returns:
2496: # 1 - Continue processing
2497: # 0 - Exit.
2498: #
2499: sub roles_delete_handler {
2500: my ($cmd, $tail, $client) = @_;
2501:
2502: my $userinput = "$cmd:$tail";
2503:
2504: my ($exedom,$exeuser,$udom,$uname,$what)=split(/:/,$tail);
2505: &Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom.
2506: "what = ".$what);
2507: my $namespace='roles';
2508: chomp($what);
2509: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2510: &GDBM_WRCREAT(), "D",
2511: "$exedom:$exeuser:$what");
2512:
2513: if ($hashref) {
2514: my @rolekeys=split(/\&/,$what);
2515:
2516: foreach my $key (@rolekeys) {
2517: delete $hashref->{$key};
2518: }
1.315 albertel 2519: if (&untie_user_hash($hashref)) {
1.231 foxr 2520: &Reply($client, "ok\n", $userinput);
2521: } else {
2522: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2523: "while attempting rolesdel\n", $userinput);
2524: }
2525: } else {
2526: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2527: "while attempting rolesdel\n", $userinput);
2528: }
2529:
2530: return 1;
2531: }
2532: ®ister_handler("rolesdel", \&roles_delete_handler, 1,1, 0); # Encoded client only
2533:
2534: # Unencrypted get from a user's profile database. See
2535: # GetProfileEntryEncrypted for a version that does end-to-end encryption.
2536: # This function retrieves a keyed item from a specific named database in the
2537: # user's directory.
2538: #
2539: # Parameters:
2540: # $cmd - Command request keyword (get).
2541: # $tail - Tail of the command. This is a colon separated list
2542: # consisting of the domain and username that uniquely
2543: # identifies the profile,
2544: # The 'namespace' which selects the gdbm file to
2545: # do the lookup in,
2546: # & separated list of keys to lookup. Note that
2547: # the values are returned as an & separated list too.
2548: # $client - File descriptor open on the client.
2549: # Returns:
2550: # 1 - Continue processing.
2551: # 0 - Exit.
2552: #
2553: sub get_profile_entry {
2554: my ($cmd, $tail, $client) = @_;
2555:
2556: my $userinput= "$cmd:$tail";
2557:
2558: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2559: chomp($what);
1.255 foxr 2560:
2561: my $replystring = read_profile($udom, $uname, $namespace, $what);
2562: my ($first) = split(/:/,$replystring);
2563: if($first ne "error") {
2564: &Reply($client, "$replystring\n", $userinput);
1.231 foxr 2565: } else {
1.255 foxr 2566: &Failure($client, $replystring." while attempting get\n", $userinput);
1.231 foxr 2567: }
2568: return 1;
1.255 foxr 2569:
2570:
1.231 foxr 2571: }
2572: ®ister_handler("get", \&get_profile_entry, 0,1,0);
2573:
2574: #
2575: # Process the encrypted get request. Note that the request is sent
2576: # in clear, but the reply is encrypted. This is a small covert channel:
2577: # information about the sensitive keys is given to the snooper. Just not
2578: # information about the values of the sensitive key. Hmm if I wanted to
2579: # know these I'd snoop for the egets. Get the profile item names from them
2580: # and then issue a get for them since there's no enforcement of the
2581: # requirement of an encrypted get for particular profile items. If I
2582: # were re-doing this, I'd force the request to be encrypted as well as the
2583: # reply. I'd also just enforce encrypted transactions for all gets since
2584: # that would prevent any covert channel snooping.
2585: #
2586: # Parameters:
2587: # $cmd - Command keyword of request (eget).
2588: # $tail - Tail of the command. See GetProfileEntry
# for more information about this.
2589: # $client - File open on the client.
2590: # Returns:
2591: # 1 - Continue processing
2592: # 0 - server should exit.
2593: sub get_profile_entry_encrypted {
2594: my ($cmd, $tail, $client) = @_;
2595:
2596: my $userinput = "$cmd:$tail";
2597:
2598: my ($cmd,$udom,$uname,$namespace,$what) = split(/:/,$userinput);
2599: chomp($what);
1.255 foxr 2600: my $qresult = read_profile($udom, $uname, $namespace, $what);
2601: my ($first) = split(/:/, $qresult);
2602: if($first ne "error") {
2603:
2604: if ($cipher) {
2605: my $cmdlength=length($qresult);
2606: $qresult.=" ";
2607: my $encqresult='';
2608: for(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
2609: $encqresult.= unpack("H16",
2610: $cipher->encrypt(substr($qresult,
2611: $encidx,
2612: 8)));
2613: }
2614: &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput);
2615: } else {
1.231 foxr 2616: &Failure( $client, "error:no_key\n", $userinput);
2617: }
2618: } else {
1.255 foxr 2619: &Failure($client, "$qresult while attempting eget\n", $userinput);
2620:
1.231 foxr 2621: }
2622:
2623: return 1;
2624: }
1.255 foxr 2625: ®ister_handler("eget", \&get_profile_entry_encrypted, 0, 1, 0);
1.263 albertel 2626:
1.231 foxr 2627: #
2628: # Deletes a key in a user profile database.
2629: #
2630: # Parameters:
2631: # $cmd - Command keyword (del).
2632: # $tail - Command tail. IN this case a colon
2633: # separated list containing:
2634: # The domain and user that identifies uniquely
2635: # the identity of the user.
2636: # The profile namespace (name of the profile
2637: # database file).
2638: # & separated list of keywords to delete.
2639: # $client - File open on client socket.
2640: # Returns:
2641: # 1 - Continue processing
2642: # 0 - Exit server.
2643: #
2644: #
2645: sub delete_profile_entry {
2646: my ($cmd, $tail, $client) = @_;
2647:
2648: my $userinput = "cmd:$tail";
2649:
2650: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2651: chomp($what);
2652: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2653: &GDBM_WRCREAT(),
2654: "D",$what);
2655: if ($hashref) {
2656: my @keys=split(/\&/,$what);
2657: foreach my $key (@keys) {
2658: delete($hashref->{$key});
2659: }
1.315 albertel 2660: if (&untie_user_hash($hashref)) {
1.231 foxr 2661: &Reply($client, "ok\n", $userinput);
2662: } else {
2663: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2664: "while attempting del\n", $userinput);
2665: }
2666: } else {
2667: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2668: "while attempting del\n", $userinput);
2669: }
2670: return 1;
2671: }
2672: ®ister_handler("del", \&delete_profile_entry, 0, 1, 0);
1.263 albertel 2673:
1.231 foxr 2674: #
2675: # List the set of keys that are defined in a profile database file.
2676: # A successful reply from this will contain an & separated list of
2677: # the keys.
2678: # Parameters:
2679: # $cmd - Command request (keys).
2680: # $tail - Remainder of the request, a colon separated
2681: # list containing domain/user that identifies the
2682: # user being queried, and the database namespace
2683: # (database filename essentially).
2684: # $client - File open on the client.
2685: # Returns:
2686: # 1 - Continue processing.
2687: # 0 - Exit the server.
2688: #
2689: sub get_profile_keys {
2690: my ($cmd, $tail, $client) = @_;
2691:
2692: my $userinput = "$cmd:$tail";
2693:
2694: my ($udom,$uname,$namespace)=split(/:/,$tail);
2695: my $qresult='';
2696: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2697: &GDBM_READER());
2698: if ($hashref) {
2699: foreach my $key (keys %$hashref) {
2700: $qresult.="$key&";
2701: }
1.315 albertel 2702: if (&untie_user_hash($hashref)) {
1.231 foxr 2703: $qresult=~s/\&$//;
2704: &Reply($client, "$qresult\n", $userinput);
2705: } else {
2706: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2707: "while attempting keys\n", $userinput);
2708: }
2709: } else {
2710: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2711: "while attempting keys\n", $userinput);
2712: }
2713:
2714: return 1;
2715: }
2716: ®ister_handler("keys", \&get_profile_keys, 0, 1, 0);
2717:
2718: #
2719: # Dump the contents of a user profile database.
2720: # Note that this constitutes a very large covert channel too since
2721: # the dump will return sensitive information that is not encrypted.
2722: # The naive security assumption is that the session negotiation ensures
2723: # our client is trusted and I don't believe that's assured at present.
2724: # Sure want badly to go to ssl or tls. Of course if my peer isn't really
2725: # a LonCAPA node they could have negotiated an encryption key too so >sigh<.
2726: #
2727: # Parameters:
2728: # $cmd - The command request keyword (currentdump).
2729: # $tail - Remainder of the request, consisting of a colon
2730: # separated list that has the domain/username and
2731: # the namespace to dump (database file).
2732: # $client - file open on the remote client.
2733: # Returns:
2734: # 1 - Continue processing.
2735: # 0 - Exit the server.
2736: #
2737: sub dump_profile_database {
2738: my ($cmd, $tail, $client) = @_;
2739:
2740: my $userinput = "$cmd:$tail";
2741:
2742: my ($udom,$uname,$namespace) = split(/:/,$tail);
2743: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2744: &GDBM_READER());
2745: if ($hashref) {
2746: # Structure of %data:
2747: # $data{$symb}->{$parameter}=$value;
2748: # $data{$symb}->{'v.'.$parameter}=$version;
2749: # since $parameter will be unescaped, we do not
2750: # have to worry about silly parameter names...
2751:
2752: my $qresult='';
2753: my %data = (); # A hash of anonymous hashes..
2754: while (my ($key,$value) = each(%$hashref)) {
2755: my ($v,$symb,$param) = split(/:/,$key);
2756: next if ($v eq 'version' || $symb eq 'keys');
2757: next if (exists($data{$symb}) &&
2758: exists($data{$symb}->{$param}) &&
2759: $data{$symb}->{'v.'.$param} > $v);
2760: $data{$symb}->{$param}=$value;
2761: $data{$symb}->{'v.'.$param}=$v;
2762: }
1.311 albertel 2763: if (&untie_user_hash($hashref)) {
1.231 foxr 2764: while (my ($symb,$param_hash) = each(%data)) {
2765: while(my ($param,$value) = each (%$param_hash)){
2766: next if ($param =~ /^v\./); # Ignore versions...
2767: #
2768: # Just dump the symb=value pairs separated by &
2769: #
2770: $qresult.=$symb.':'.$param.'='.$value.'&';
2771: }
2772: }
2773: chop($qresult);
2774: &Reply($client , "$qresult\n", $userinput);
2775: } else {
2776: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2777: "while attempting currentdump\n", $userinput);
2778: }
2779: } else {
2780: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2781: "while attempting currentdump\n", $userinput);
2782: }
2783:
2784: return 1;
2785: }
2786: ®ister_handler("currentdump", \&dump_profile_database, 0, 1, 0);
2787:
2788: #
2789: # Dump a profile database with an optional regular expression
2790: # to match against the keys. In this dump, no effort is made
2791: # to separate symb from version information. Presumably the
2792: # databases that are dumped by this command are of a different
2793: # structure. Need to look at this and improve the documentation of
2794: # both this and the currentdump handler.
2795: # Parameters:
2796: # $cmd - The command keyword.
2797: # $tail - All of the characters after the $cmd:
2798: # These are expected to be a colon
2799: # separated list containing:
2800: # domain/user - identifying the user.
2801: # namespace - identifying the database.
2802: # regexp - optional regular expression
2803: # that is matched against
2804: # database keywords to do
2805: # selective dumps.
2806: # $client - Channel open on the client.
2807: # Returns:
2808: # 1 - Continue processing.
2809: # Side effects:
2810: # response is written to $client.
2811: #
2812: sub dump_with_regexp {
2813: my ($cmd, $tail, $client) = @_;
2814:
2815:
2816: my $userinput = "$cmd:$tail";
2817:
1.306 albertel 2818: my ($udom,$uname,$namespace,$regexp,$range)=split(/:/,$tail);
1.231 foxr 2819: if (defined($regexp)) {
2820: $regexp=&unescape($regexp);
2821: } else {
2822: $regexp='.';
2823: }
1.306 albertel 2824: my ($start,$end);
2825: if (defined($range)) {
2826: if ($range =~/^(\d+)\-(\d+)$/) {
2827: ($start,$end) = ($1,$2);
2828: } elsif ($range =~/^(\d+)$/) {
2829: ($start,$end) = (0,$1);
2830: } else {
2831: undef($range);
2832: }
2833: }
1.231 foxr 2834: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2835: &GDBM_READER());
2836: if ($hashref) {
2837: my $qresult='';
1.306 albertel 2838: my $count=0;
1.231 foxr 2839: while (my ($key,$value) = each(%$hashref)) {
2840: if ($regexp eq '.') {
1.306 albertel 2841: $count++;
2842: if (defined($range) && $count >= $end) { last; }
2843: if (defined($range) && $count < $start) { next; }
1.231 foxr 2844: $qresult.=$key.'='.$value.'&';
2845: } else {
2846: my $unescapeKey = &unescape($key);
2847: if (eval('$unescapeKey=~/$regexp/')) {
1.306 albertel 2848: $count++;
2849: if (defined($range) && $count >= $end) { last; }
2850: if (defined($range) && $count < $start) { next; }
1.231 foxr 2851: $qresult.="$key=$value&";
2852: }
2853: }
2854: }
1.311 albertel 2855: if (&untie_user_hash($hashref)) {
1.231 foxr 2856: chop($qresult);
2857: &Reply($client, "$qresult\n", $userinput);
2858: } else {
2859: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2860: "while attempting dump\n", $userinput);
2861: }
2862: } else {
2863: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2864: "while attempting dump\n", $userinput);
2865: }
2866:
2867: return 1;
2868: }
2869: ®ister_handler("dump", \&dump_with_regexp, 0, 1, 0);
2870:
2871: # Store a set of key=value pairs associated with a versioned name.
2872: #
2873: # Parameters:
2874: # $cmd - Request command keyword.
2875: # $tail - Tail of the request. This is a colon
2876: # separated list containing:
2877: # domain/user - User and authentication domain.
2878: # namespace - Name of the database being modified
2879: # rid - Resource keyword to modify.
2880: # what - new value associated with rid.
2881: #
2882: # $client - Socket open on the client.
2883: #
2884: #
2885: # Returns:
2886: # 1 (keep on processing).
2887: # Side-Effects:
2888: # Writes to the client
2889: sub store_handler {
2890: my ($cmd, $tail, $client) = @_;
2891:
2892: my $userinput = "$cmd:$tail";
2893:
2894: my ($udom,$uname,$namespace,$rid,$what) =split(/:/,$tail);
2895: if ($namespace ne 'roles') {
2896:
2897: chomp($what);
2898: my @pairs=split(/\&/,$what);
2899: my $hashref = &tie_user_hash($udom, $uname, $namespace,
1.268 albertel 2900: &GDBM_WRCREAT(), "S",
1.231 foxr 2901: "$rid:$what");
2902: if ($hashref) {
2903: my $now = time;
2904: my @previouskeys=split(/&/,$hashref->{"keys:$rid"});
2905: my $key;
2906: $hashref->{"version:$rid"}++;
2907: my $version=$hashref->{"version:$rid"};
2908: my $allkeys='';
2909: foreach my $pair (@pairs) {
2910: my ($key,$value)=split(/=/,$pair);
2911: $allkeys.=$key.':';
2912: $hashref->{"$version:$rid:$key"}=$value;
2913: }
2914: $hashref->{"$version:$rid:timestamp"}=$now;
2915: $allkeys.='timestamp';
2916: $hashref->{"$version:keys:$rid"}=$allkeys;
1.311 albertel 2917: if (&untie_user_hash($hashref)) {
1.231 foxr 2918: &Reply($client, "ok\n", $userinput);
2919: } else {
2920: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2921: "while attempting store\n", $userinput);
2922: }
2923: } else {
2924: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2925: "while attempting store\n", $userinput);
2926: }
2927: } else {
2928: &Failure($client, "refused\n", $userinput);
2929: }
2930:
2931: return 1;
2932: }
2933: ®ister_handler("store", \&store_handler, 0, 1, 0);
1.263 albertel 2934:
1.323 albertel 2935: # Modify a set of key=value pairs associated with a versioned name.
2936: #
2937: # Parameters:
2938: # $cmd - Request command keyword.
2939: # $tail - Tail of the request. This is a colon
2940: # separated list containing:
2941: # domain/user - User and authentication domain.
2942: # namespace - Name of the database being modified
2943: # rid - Resource keyword to modify.
2944: # v - Version item to modify
2945: # what - new value associated with rid.
2946: #
2947: # $client - Socket open on the client.
2948: #
2949: #
2950: # Returns:
2951: # 1 (keep on processing).
2952: # Side-Effects:
2953: # Writes to the client
2954: sub putstore_handler {
2955: my ($cmd, $tail, $client) = @_;
2956:
2957: my $userinput = "$cmd:$tail";
2958:
2959: my ($udom,$uname,$namespace,$rid,$v,$what) =split(/:/,$tail);
2960: if ($namespace ne 'roles') {
2961:
2962: chomp($what);
2963: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2964: &GDBM_WRCREAT(), "M",
2965: "$rid:$v:$what");
2966: if ($hashref) {
2967: my $now = time;
2968: my %data = &hash_extract($what);
2969: my @allkeys;
2970: while (my($key,$value) = each(%data)) {
2971: push(@allkeys,$key);
2972: $hashref->{"$v:$rid:$key"} = $value;
2973: }
2974: my $allkeys = join(':',@allkeys);
2975: $hashref->{"$v:keys:$rid"}=$allkeys;
2976:
2977: if (&untie_user_hash($hashref)) {
2978: &Reply($client, "ok\n", $userinput);
2979: } else {
2980: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2981: "while attempting store\n", $userinput);
2982: }
2983: } else {
2984: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2985: "while attempting store\n", $userinput);
2986: }
2987: } else {
2988: &Failure($client, "refused\n", $userinput);
2989: }
2990:
2991: return 1;
2992: }
2993: ®ister_handler("putstore", \&putstore_handler, 0, 1, 0);
2994:
2995: sub hash_extract {
2996: my ($str)=@_;
2997: my %hash;
2998: foreach my $pair (split(/\&/,$str)) {
2999: my ($key,$value)=split(/=/,$pair);
3000: $hash{$key}=$value;
3001: }
3002: return (%hash);
3003: }
3004: sub hash_to_str {
3005: my ($hash_ref)=@_;
3006: my $str;
3007: foreach my $key (keys(%$hash_ref)) {
3008: $str.=$key.'='.$hash_ref->{$key}.'&';
3009: }
3010: $str=~s/\&$//;
3011: return $str;
3012: }
3013:
1.231 foxr 3014: #
3015: # Dump out all versions of a resource that has key=value pairs associated
3016: # with it for each version. These resources are built up via the store
3017: # command.
3018: #
3019: # Parameters:
3020: # $cmd - Command keyword.
3021: # $tail - Remainder of the request which consists of:
3022: # domain/user - User and auth. domain.
3023: # namespace - name of resource database.
3024: # rid - Resource id.
3025: # $client - socket open on the client.
3026: #
3027: # Returns:
3028: # 1 indicating the caller should not yet exit.
3029: # Side-effects:
3030: # Writes a reply to the client.
3031: # The reply is a string of the following shape:
3032: # version=current&version:keys=k1:k2...&1:k1=v1&1:k2=v2...
3033: # Where the 1 above represents version 1.
3034: # this continues for all pairs of keys in all versions.
3035: #
3036: #
3037: #
3038: #
3039: sub restore_handler {
3040: my ($cmd, $tail, $client) = @_;
3041:
3042: my $userinput = "$cmd:$tail"; # Only used for logging purposes.
3043:
3044: my ($cmd,$udom,$uname,$namespace,$rid) = split(/:/,$userinput);
3045: $namespace=~s/\//\_/g;
3046: $namespace=~s/\W//g;
3047: chomp($rid);
3048: my $qresult='';
1.309 albertel 3049: my $hashref = &tie_user_hash($udom, $uname, $namespace, &GDBM_READER());
3050: if ($hashref) {
3051: my $version=$hashref->{"version:$rid"};
1.231 foxr 3052: $qresult.="version=$version&";
3053: my $scope;
3054: for ($scope=1;$scope<=$version;$scope++) {
1.309 albertel 3055: my $vkeys=$hashref->{"$scope:keys:$rid"};
1.231 foxr 3056: my @keys=split(/:/,$vkeys);
3057: my $key;
3058: $qresult.="$scope:keys=$vkeys&";
3059: foreach $key (@keys) {
1.309 albertel 3060: $qresult.="$scope:$key=".$hashref->{"$scope:$rid:$key"}."&";
1.231 foxr 3061: }
3062: }
1.311 albertel 3063: if (&untie_user_hash($hashref)) {
1.231 foxr 3064: $qresult=~s/\&$//;
3065: &Reply( $client, "$qresult\n", $userinput);
3066: } else {
3067: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3068: "while attempting restore\n", $userinput);
3069: }
3070: } else {
3071: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3072: "while attempting restore\n", $userinput);
3073: }
3074:
3075: return 1;
3076:
3077:
3078: }
3079: ®ister_handler("restore", \&restore_handler, 0,1,0);
1.234 foxr 3080:
3081: #
1.324 raeburn 3082: # Add a chat message to a synchronous discussion board.
1.234 foxr 3083: #
3084: # Parameters:
3085: # $cmd - Request keyword.
3086: # $tail - Tail of the command. A colon separated list
3087: # containing:
3088: # cdom - Domain on which the chat board lives
1.324 raeburn 3089: # cnum - Course containing the chat board.
3090: # newpost - Body of the posting.
3091: # group - Optional group, if chat board is only
3092: # accessible in a group within the course
1.234 foxr 3093: # $client - Socket open on the client.
3094: # Returns:
3095: # 1 - Indicating caller should keep on processing.
3096: #
3097: # Side-effects:
3098: # writes a reply to the client.
3099: #
3100: #
3101: sub send_chat_handler {
3102: my ($cmd, $tail, $client) = @_;
3103:
3104:
3105: my $userinput = "$cmd:$tail";
3106:
1.324 raeburn 3107: my ($cdom,$cnum,$newpost,$group)=split(/\:/,$tail);
3108: &chat_add($cdom,$cnum,$newpost,$group);
1.234 foxr 3109: &Reply($client, "ok\n", $userinput);
3110:
3111: return 1;
3112: }
3113: ®ister_handler("chatsend", \&send_chat_handler, 0, 1, 0);
1.263 albertel 3114:
1.234 foxr 3115: #
1.324 raeburn 3116: # Retrieve the set of chat messages from a discussion board.
1.234 foxr 3117: #
3118: # Parameters:
3119: # $cmd - Command keyword that initiated the request.
3120: # $tail - Remainder of the request after the command
3121: # keyword. In this case a colon separated list of
3122: # chat domain - Which discussion board.
3123: # chat id - Discussion thread(?)
3124: # domain/user - Authentication domain and username
3125: # of the requesting person.
1.324 raeburn 3126: # group - Optional course group containing
3127: # the board.
1.234 foxr 3128: # $client - Socket open on the client program.
3129: # Returns:
3130: # 1 - continue processing
3131: # Side effects:
3132: # Response is written to the client.
3133: #
3134: sub retrieve_chat_handler {
3135: my ($cmd, $tail, $client) = @_;
3136:
3137:
3138: my $userinput = "$cmd:$tail";
3139:
1.324 raeburn 3140: my ($cdom,$cnum,$udom,$uname,$group)=split(/\:/,$tail);
1.234 foxr 3141: my $reply='';
1.324 raeburn 3142: foreach (&get_chat($cdom,$cnum,$udom,$uname,$group)) {
1.234 foxr 3143: $reply.=&escape($_).':';
3144: }
3145: $reply=~s/\:$//;
3146: &Reply($client, $reply."\n", $userinput);
3147:
3148:
3149: return 1;
3150: }
3151: ®ister_handler("chatretr", \&retrieve_chat_handler, 0, 1, 0);
3152:
3153: #
3154: # Initiate a query of an sql database. SQL query repsonses get put in
3155: # a file for later retrieval. This prevents sql query results from
3156: # bottlenecking the system. Note that with loncnew, perhaps this is
3157: # less of an issue since multiple outstanding requests can be concurrently
3158: # serviced.
3159: #
3160: # Parameters:
3161: # $cmd - COmmand keyword that initiated the request.
3162: # $tail - Remainder of the command after the keyword.
3163: # For this function, this consists of a query and
3164: # 3 arguments that are self-documentingly labelled
3165: # in the original arg1, arg2, arg3.
3166: # $client - Socket open on the client.
3167: # Return:
3168: # 1 - Indicating processing should continue.
3169: # Side-effects:
3170: # a reply is written to $client.
3171: #
3172: sub send_query_handler {
3173: my ($cmd, $tail, $client) = @_;
3174:
3175:
3176: my $userinput = "$cmd:$tail";
3177:
3178: my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail);
3179: $query=~s/\n*$//g;
3180: &Reply($client, "". &sql_reply("$clientname\&$query".
3181: "\&$arg1"."\&$arg2"."\&$arg3")."\n",
3182: $userinput);
3183:
3184: return 1;
3185: }
3186: ®ister_handler("querysend", \&send_query_handler, 0, 1, 0);
3187:
3188: #
3189: # Add a reply to an sql query. SQL queries are done asyncrhonously.
3190: # The query is submitted via a "querysend" transaction.
3191: # There it is passed on to the lonsql daemon, queued and issued to
3192: # mysql.
3193: # This transaction is invoked when the sql transaction is complete
3194: # it stores the query results in flie and indicates query completion.
3195: # presumably local software then fetches this response... I'm guessing
3196: # the sequence is: lonc does a querysend, we ask lonsql to do it.
3197: # lonsql on completion of the query interacts with the lond of our
3198: # client to do a query reply storing two files:
3199: # - id - The results of the query.
3200: # - id.end - Indicating the transaction completed.
3201: # NOTE: id is a unique id assigned to the query and querysend time.
3202: # Parameters:
3203: # $cmd - Command keyword that initiated this request.
3204: # $tail - Remainder of the tail. In this case that's a colon
3205: # separated list containing the query Id and the
3206: # results of the query.
3207: # $client - Socket open on the client.
3208: # Return:
3209: # 1 - Indicating that we should continue processing.
3210: # Side effects:
3211: # ok written to the client.
3212: #
3213: sub reply_query_handler {
3214: my ($cmd, $tail, $client) = @_;
3215:
3216:
3217: my $userinput = "$cmd:$tail";
3218:
3219: my ($cmd,$id,$reply)=split(/:/,$userinput);
3220: my $store;
3221: my $execdir=$perlvar{'lonDaemons'};
3222: if ($store=IO::File->new(">$execdir/tmp/$id")) {
3223: $reply=~s/\&/\n/g;
3224: print $store $reply;
3225: close $store;
3226: my $store2=IO::File->new(">$execdir/tmp/$id.end");
3227: print $store2 "done\n";
3228: close $store2;
3229: &Reply($client, "ok\n", $userinput);
3230: } else {
3231: &Failure($client, "error: ".($!+0)
3232: ." IO::File->new Failed ".
3233: "while attempting queryreply\n", $userinput);
3234: }
3235:
3236:
3237: return 1;
3238: }
3239: ®ister_handler("queryreply", \&reply_query_handler, 0, 1, 0);
3240:
3241: #
3242: # Process the courseidput request. Not quite sure what this means
3243: # at the system level sense. It appears a gdbm file in the
3244: # /home/httpd/lonUsers/$domain/nohist_courseids is tied and
3245: # a set of entries made in that database.
3246: #
3247: # Parameters:
3248: # $cmd - The command keyword that initiated this request.
3249: # $tail - Tail of the command. In this case consists of a colon
3250: # separated list contaning the domain to apply this to and
3251: # an ampersand separated list of keyword=value pairs.
1.272 raeburn 3252: # Each value is a colon separated list that includes:
3253: # description, institutional code and course owner.
3254: # For backward compatibility with versions included
3255: # in LON-CAPA 1.1.X (and earlier) and 1.2.X, institutional
3256: # code and/or course owner are preserved from the existing
3257: # record when writing a new record in response to 1.1 or
3258: # 1.2 implementations of lonnet::flushcourselogs().
3259: #
1.234 foxr 3260: # $client - Socket open on the client.
3261: # Returns:
3262: # 1 - indicating that processing should continue
3263: #
3264: # Side effects:
3265: # reply is written to the client.
3266: #
3267: sub put_course_id_handler {
3268: my ($cmd, $tail, $client) = @_;
3269:
3270:
3271: my $userinput = "$cmd:$tail";
3272:
1.266 raeburn 3273: my ($udom, $what) = split(/:/, $tail,2);
1.234 foxr 3274: chomp($what);
3275: my $now=time;
3276: my @pairs=split(/\&/,$what);
3277:
3278: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3279: if ($hashref) {
3280: foreach my $pair (@pairs) {
1.271 raeburn 3281: my ($key,$courseinfo) = split(/=/,$pair,2);
3282: $courseinfo =~ s/=/:/g;
1.272 raeburn 3283:
1.273 albertel 3284: my @current_items = split(/:/,$hashref->{$key});
3285: shift(@current_items); # remove description
3286: pop(@current_items); # remove last access
1.272 raeburn 3287: my $numcurrent = scalar(@current_items);
3288:
1.273 albertel 3289: my @new_items = split(/:/,$courseinfo);
1.272 raeburn 3290: my $numnew = scalar(@new_items);
3291: if ($numcurrent > 0) {
1.333 raeburn 3292: if ($numnew <= $numcurrent) { # flushcourselogs() from pre 2.2
3293: for (my $j=$numcurrent-$numnew; $j>=0; $j--) {
3294: $courseinfo .= ':'.$current_items[$numcurrent-$j-1];
3295: }
1.272 raeburn 3296: }
3297: }
1.266 raeburn 3298: $hashref->{$key}=$courseinfo.':'.$now;
1.234 foxr 3299: }
1.311 albertel 3300: if (&untie_domain_hash($hashref)) {
1.253 foxr 3301: &Reply( $client, "ok\n", $userinput);
1.234 foxr 3302: } else {
1.253 foxr 3303: &Failure($client, "error: ".($!+0)
1.234 foxr 3304: ." untie(GDBM) Failed ".
3305: "while attempting courseidput\n", $userinput);
3306: }
3307: } else {
1.253 foxr 3308: &Failure($client, "error: ".($!+0)
1.234 foxr 3309: ." tie(GDBM) Failed ".
3310: "while attempting courseidput\n", $userinput);
3311: }
1.253 foxr 3312:
1.234 foxr 3313:
3314: return 1;
3315: }
3316: ®ister_handler("courseidput", \&put_course_id_handler, 0, 1, 0);
3317:
3318: # Retrieves the value of a course id resource keyword pattern
3319: # defined since a starting date. Both the starting date and the
3320: # keyword pattern are optional. If the starting date is not supplied it
3321: # is treated as the beginning of time. If the pattern is not found,
3322: # it is treatred as "." matching everything.
3323: #
3324: # Parameters:
3325: # $cmd - Command keyword that resulted in us being dispatched.
3326: # $tail - The remainder of the command that, in this case, consists
3327: # of a colon separated list of:
3328: # domain - The domain in which the course database is
3329: # defined.
3330: # since - Optional parameter describing the minimum
3331: # time of definition(?) of the resources that
3332: # will match the dump.
3333: # description - regular expression that is used to filter
3334: # the dump. Only keywords matching this regexp
3335: # will be used.
1.272 raeburn 3336: # institutional code - optional supplied code to filter
3337: # the dump. Only courses with an institutional code
3338: # that match the supplied code will be returned.
3339: # owner - optional supplied username of owner to filter
3340: # the dump. Only courses for which the course
3341: # owner matches the supplied username will be
1.274 albertel 3342: # returned. Implicit assumption that owner
3343: # is a user in the domain in which the
3344: # course database is defined.
1.234 foxr 3345: # $client - The socket open on the client.
3346: # Returns:
3347: # 1 - Continue processing.
3348: # Side Effects:
3349: # a reply is written to $client.
3350: sub dump_course_id_handler {
3351: my ($cmd, $tail, $client) = @_;
3352:
3353: my $userinput = "$cmd:$tail";
3354:
1.333 raeburn 3355: my ($udom,$since,$description,$instcodefilter,$ownerfilter,$coursefilter,
3356: $typefilter) =split(/:/,$tail);
1.234 foxr 3357: if (defined($description)) {
3358: $description=&unescape($description);
3359: } else {
3360: $description='.';
3361: }
1.266 raeburn 3362: if (defined($instcodefilter)) {
3363: $instcodefilter=&unescape($instcodefilter);
3364: } else {
3365: $instcodefilter='.';
3366: }
3367: if (defined($ownerfilter)) {
3368: $ownerfilter=&unescape($ownerfilter);
3369: } else {
3370: $ownerfilter='.';
3371: }
1.282 raeburn 3372: if (defined($coursefilter)) {
3373: $coursefilter=&unescape($coursefilter);
3374: } else {
3375: $coursefilter='.';
3376: }
1.333 raeburn 3377: if (defined($typefilter)) {
3378: $typefilter=&unescape($typefilter);
3379: } else {
3380: $typefilter='.';
3381: }
1.266 raeburn 3382:
1.234 foxr 3383: unless (defined($since)) { $since=0; }
3384: my $qresult='';
3385: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3386: if ($hashref) {
3387: while (my ($key,$value) = each(%$hashref)) {
1.333 raeburn 3388: my ($descr,$lasttime,$inst_code,$owner,$type);
1.274 albertel 3389: my @courseitems = split(/:/,$value);
3390: $lasttime = pop(@courseitems);
1.333 raeburn 3391: ($descr,$inst_code,$owner,$type)=@courseitems;
1.234 foxr 3392: if ($lasttime<$since) { next; }
1.266 raeburn 3393: my $match = 1;
3394: unless ($description eq '.') {
3395: my $unescapeDescr = &unescape($descr);
3396: unless (eval('$unescapeDescr=~/\Q$description\E/i')) {
3397: $match = 0;
1.234 foxr 3398: }
1.266 raeburn 3399: }
3400: unless ($instcodefilter eq '.' || !defined($instcodefilter)) {
3401: my $unescapeInstcode = &unescape($inst_code);
3402: unless (eval('$unescapeInstcode=~/\Q$instcodefilter\E/i')) {
3403: $match = 0;
3404: }
1.234 foxr 3405: }
1.266 raeburn 3406: unless ($ownerfilter eq '.' || !defined($ownerfilter)) {
3407: my $unescapeOwner = &unescape($owner);
3408: unless (eval('$unescapeOwner=~/\Q$ownerfilter\E/i')) {
3409: $match = 0;
3410: }
3411: }
1.282 raeburn 3412: unless ($coursefilter eq '.' || !defined($coursefilter)) {
3413: my $unescapeCourse = &unescape($key);
3414: unless (eval('$unescapeCourse=~/^$udom(_)\Q$coursefilter\E$/')) {
3415: $match = 0;
3416: }
3417: }
1.333 raeburn 3418: unless ($typefilter eq '.' || !defined($typefilter)) {
3419: my $unescapeType = &unescape($type);
3420: if (!defined($type)) {
3421: if ($typefilter ne 'Course') {
3422: $match = 0;
3423: }
3424: } else {
3425: unless (eval('$unescapeType=~/^\Q$typefilter\E$/')) {
3426: $match = 0;
3427: }
3428: }
3429: }
1.266 raeburn 3430: if ($match == 1) {
3431: $qresult.=$key.'='.$descr.':'.$inst_code.':'.$owner.'&';
3432: }
1.234 foxr 3433: }
1.311 albertel 3434: if (&untie_domain_hash($hashref)) {
1.234 foxr 3435: chop($qresult);
3436: &Reply($client, "$qresult\n", $userinput);
3437: } else {
3438: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3439: "while attempting courseiddump\n", $userinput);
3440: }
3441: } else {
3442: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3443: "while attempting courseiddump\n", $userinput);
3444: }
3445:
3446:
3447: return 1;
3448: }
3449: ®ister_handler("courseiddump", \&dump_course_id_handler, 0, 1, 0);
1.238 foxr 3450:
3451: #
3452: # Puts an id to a domains id database.
3453: #
3454: # Parameters:
3455: # $cmd - The command that triggered us.
3456: # $tail - Remainder of the request other than the command. This is a
3457: # colon separated list containing:
3458: # $domain - The domain for which we are writing the id.
3459: # $pairs - The id info to write... this is and & separated list
3460: # of keyword=value.
3461: # $client - Socket open on the client.
3462: # Returns:
3463: # 1 - Continue processing.
3464: # Side effects:
3465: # reply is written to $client.
3466: #
3467: sub put_id_handler {
3468: my ($cmd,$tail,$client) = @_;
3469:
3470:
3471: my $userinput = "$cmd:$tail";
3472:
3473: my ($udom,$what)=split(/:/,$tail);
3474: chomp($what);
3475: my @pairs=split(/\&/,$what);
3476: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
3477: "P", $what);
3478: if ($hashref) {
3479: foreach my $pair (@pairs) {
3480: my ($key,$value)=split(/=/,$pair);
3481: $hashref->{$key}=$value;
3482: }
1.311 albertel 3483: if (&untie_domain_hash($hashref)) {
1.238 foxr 3484: &Reply($client, "ok\n", $userinput);
3485: } else {
3486: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3487: "while attempting idput\n", $userinput);
3488: }
3489: } else {
3490: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3491: "while attempting idput\n", $userinput);
3492: }
3493:
3494: return 1;
3495: }
1.263 albertel 3496: ®ister_handler("idput", \&put_id_handler, 0, 1, 0);
1.238 foxr 3497:
3498: #
3499: # Retrieves a set of id values from the id database.
3500: # Returns an & separated list of results, one for each requested id to the
3501: # client.
3502: #
3503: # Parameters:
3504: # $cmd - Command keyword that caused us to be dispatched.
3505: # $tail - Tail of the command. Consists of a colon separated:
3506: # domain - the domain whose id table we dump
3507: # ids Consists of an & separated list of
3508: # id keywords whose values will be fetched.
3509: # nonexisting keywords will have an empty value.
3510: # $client - Socket open on the client.
3511: #
3512: # Returns:
3513: # 1 - indicating processing should continue.
3514: # Side effects:
3515: # An & separated list of results is written to $client.
3516: #
3517: sub get_id_handler {
3518: my ($cmd, $tail, $client) = @_;
3519:
3520:
3521: my $userinput = "$client:$tail";
3522:
3523: my ($udom,$what)=split(/:/,$tail);
3524: chomp($what);
3525: my @queries=split(/\&/,$what);
3526: my $qresult='';
3527: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_READER());
3528: if ($hashref) {
3529: for (my $i=0;$i<=$#queries;$i++) {
3530: $qresult.="$hashref->{$queries[$i]}&";
3531: }
1.311 albertel 3532: if (&untie_domain_hash($hashref)) {
1.238 foxr 3533: $qresult=~s/\&$//;
3534: &Reply($client, "$qresult\n", $userinput);
3535: } else {
3536: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3537: "while attempting idget\n",$userinput);
3538: }
3539: } else {
3540: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3541: "while attempting idget\n",$userinput);
3542: }
3543:
3544: return 1;
3545: }
1.263 albertel 3546: ®ister_handler("idget", \&get_id_handler, 0, 1, 0);
1.238 foxr 3547:
3548: #
1.299 raeburn 3549: # Puts broadcast e-mail sent by Domain Coordinator in nohist_dcmail database
3550: #
3551: # Parameters
3552: # $cmd - Command keyword that caused us to be dispatched.
3553: # $tail - Tail of the command. Consists of a colon separated:
3554: # domain - the domain whose dcmail we are recording
3555: # email Consists of key=value pair
3556: # where key is unique msgid
3557: # and value is message (in XML)
3558: # $client - Socket open on the client.
3559: #
3560: # Returns:
3561: # 1 - indicating processing should continue.
3562: # Side effects
3563: # reply is written to $client.
3564: #
3565: sub put_dcmail_handler {
3566: my ($cmd,$tail,$client) = @_;
3567: my $userinput = "$cmd:$tail";
3568:
3569: my ($udom,$what)=split(/:/,$tail);
3570: chomp($what);
3571: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
3572: if ($hashref) {
3573: my ($key,$value)=split(/=/,$what);
3574: $hashref->{$key}=$value;
3575: }
1.311 albertel 3576: if (&untie_domain_hash($hashref)) {
1.299 raeburn 3577: &Reply($client, "ok\n", $userinput);
3578: } else {
3579: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3580: "while attempting dcmailput\n", $userinput);
3581: }
3582: return 1;
3583: }
3584: ®ister_handler("dcmailput", \&put_dcmail_handler, 0, 1, 0);
3585:
3586: #
3587: # Retrieves broadcast e-mail from nohist_dcmail database
3588: # Returns to client an & separated list of key=value pairs,
3589: # where key is msgid and value is message information.
3590: #
3591: # Parameters
3592: # $cmd - Command keyword that caused us to be dispatched.
3593: # $tail - Tail of the command. Consists of a colon separated:
3594: # domain - the domain whose dcmail table we dump
3595: # startfilter - beginning of time window
3596: # endfilter - end of time window
3597: # sendersfilter - & separated list of username:domain
3598: # for senders to search for.
3599: # $client - Socket open on the client.
3600: #
3601: # Returns:
3602: # 1 - indicating processing should continue.
3603: # Side effects
3604: # reply (& separated list of msgid=messageinfo pairs) is
3605: # written to $client.
3606: #
3607: sub dump_dcmail_handler {
3608: my ($cmd, $tail, $client) = @_;
3609:
3610: my $userinput = "$cmd:$tail";
3611: my ($udom,$startfilter,$endfilter,$sendersfilter) = split(/:/,$tail);
3612: chomp($sendersfilter);
3613: my @senders = ();
3614: if (defined($startfilter)) {
3615: $startfilter=&unescape($startfilter);
3616: } else {
3617: $startfilter='.';
3618: }
3619: if (defined($endfilter)) {
3620: $endfilter=&unescape($endfilter);
3621: } else {
3622: $endfilter='.';
3623: }
3624: if (defined($sendersfilter)) {
3625: $sendersfilter=&unescape($sendersfilter);
1.300 albertel 3626: @senders = map { &unescape($_) } split(/\&/,$sendersfilter);
1.299 raeburn 3627: }
3628:
3629: my $qresult='';
3630: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
3631: if ($hashref) {
3632: while (my ($key,$value) = each(%$hashref)) {
3633: my $match = 1;
1.303 albertel 3634: my ($timestamp,$subj,$uname,$udom) =
3635: split(/:/,&unescape(&unescape($key)),5); # yes, twice really
1.299 raeburn 3636: $subj = &unescape($subj);
3637: unless ($startfilter eq '.' || !defined($startfilter)) {
3638: if ($timestamp < $startfilter) {
3639: $match = 0;
3640: }
3641: }
3642: unless ($endfilter eq '.' || !defined($endfilter)) {
3643: if ($timestamp > $endfilter) {
3644: $match = 0;
3645: }
3646: }
3647: unless (@senders < 1) {
3648: unless (grep/^$uname:$udom$/,@senders) {
3649: $match = 0;
3650: }
3651: }
3652: if ($match == 1) {
3653: $qresult.=$key.'='.$value.'&';
3654: }
3655: }
1.311 albertel 3656: if (&untie_domain_hash($hashref)) {
1.299 raeburn 3657: chop($qresult);
3658: &Reply($client, "$qresult\n", $userinput);
3659: } else {
3660: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3661: "while attempting dcmaildump\n", $userinput);
3662: }
3663: } else {
3664: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3665: "while attempting dcmaildump\n", $userinput);
3666: }
3667: return 1;
3668: }
3669:
3670: ®ister_handler("dcmaildump", \&dump_dcmail_handler, 0, 1, 0);
3671:
3672: #
3673: # Puts domain roles in nohist_domainroles database
3674: #
3675: # Parameters
3676: # $cmd - Command keyword that caused us to be dispatched.
3677: # $tail - Tail of the command. Consists of a colon separated:
3678: # domain - the domain whose roles we are recording
3679: # role - Consists of key=value pair
3680: # where key is unique role
3681: # and value is start/end date information
3682: # $client - Socket open on the client.
3683: #
3684: # Returns:
3685: # 1 - indicating processing should continue.
3686: # Side effects
3687: # reply is written to $client.
3688: #
3689:
3690: sub put_domainroles_handler {
3691: my ($cmd,$tail,$client) = @_;
3692:
3693: my $userinput = "$cmd:$tail";
3694: my ($udom,$what)=split(/:/,$tail);
3695: chomp($what);
3696: my @pairs=split(/\&/,$what);
3697: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
3698: if ($hashref) {
3699: foreach my $pair (@pairs) {
3700: my ($key,$value)=split(/=/,$pair);
3701: $hashref->{$key}=$value;
3702: }
1.311 albertel 3703: if (&untie_domain_hash($hashref)) {
1.299 raeburn 3704: &Reply($client, "ok\n", $userinput);
3705: } else {
3706: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3707: "while attempting domroleput\n", $userinput);
3708: }
3709: } else {
3710: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3711: "while attempting domroleput\n", $userinput);
3712: }
3713:
3714: return 1;
3715: }
3716:
3717: ®ister_handler("domroleput", \&put_domainroles_handler, 0, 1, 0);
3718:
3719: #
3720: # Retrieves domain roles from nohist_domainroles database
3721: # Returns to client an & separated list of key=value pairs,
3722: # where key is role and value is start and end date information.
3723: #
3724: # Parameters
3725: # $cmd - Command keyword that caused us to be dispatched.
3726: # $tail - Tail of the command. Consists of a colon separated:
3727: # domain - the domain whose domain roles table we dump
3728: # $client - Socket open on the client.
3729: #
3730: # Returns:
3731: # 1 - indicating processing should continue.
3732: # Side effects
3733: # reply (& separated list of role=start/end info pairs) is
3734: # written to $client.
3735: #
3736: sub dump_domainroles_handler {
3737: my ($cmd, $tail, $client) = @_;
3738:
3739: my $userinput = "$cmd:$tail";
3740: my ($udom,$startfilter,$endfilter,$rolesfilter) = split(/:/,$tail);
3741: chomp($rolesfilter);
3742: my @roles = ();
3743: if (defined($startfilter)) {
3744: $startfilter=&unescape($startfilter);
3745: } else {
3746: $startfilter='.';
3747: }
3748: if (defined($endfilter)) {
3749: $endfilter=&unescape($endfilter);
3750: } else {
3751: $endfilter='.';
3752: }
3753: if (defined($rolesfilter)) {
3754: $rolesfilter=&unescape($rolesfilter);
1.300 albertel 3755: @roles = split(/\&/,$rolesfilter);
1.299 raeburn 3756: }
3757:
3758: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
3759: if ($hashref) {
3760: my $qresult = '';
3761: while (my ($key,$value) = each(%$hashref)) {
3762: my $match = 1;
3763: my ($start,$end) = split(/:/,&unescape($value));
3764: my ($trole,$uname,$udom,$runame,$rudom,$rsec) = split(/:/,&unescape($key));
3765: unless ($startfilter eq '.' || !defined($startfilter)) {
3766: if ($start >= $startfilter) {
3767: $match = 0;
3768: }
3769: }
3770: unless ($endfilter eq '.' || !defined($endfilter)) {
3771: if ($end <= $endfilter) {
3772: $match = 0;
3773: }
3774: }
3775: unless (@roles < 1) {
3776: unless (grep/^$trole$/,@roles) {
3777: $match = 0;
3778: }
3779: }
3780: if ($match == 1) {
3781: $qresult.=$key.'='.$value.'&';
3782: }
3783: }
1.311 albertel 3784: if (&untie_domain_hash($hashref)) {
1.299 raeburn 3785: chop($qresult);
3786: &Reply($client, "$qresult\n", $userinput);
3787: } else {
3788: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3789: "while attempting domrolesdump\n", $userinput);
3790: }
3791: } else {
3792: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3793: "while attempting domrolesdump\n", $userinput);
3794: }
3795: return 1;
3796: }
3797:
3798: ®ister_handler("domrolesdump", \&dump_domainroles_handler, 0, 1, 0);
3799:
3800:
1.238 foxr 3801: # Process the tmpput command I'm not sure what this does.. Seems to
3802: # create a file in the lonDaemons/tmp directory of the form $id.tmp
3803: # where Id is the client's ip concatenated with a sequence number.
3804: # The file will contain some value that is passed in. Is this e.g.
3805: # a login token?
3806: #
3807: # Parameters:
3808: # $cmd - The command that got us dispatched.
3809: # $tail - The remainder of the request following $cmd:
3810: # In this case this will be the contents of the file.
3811: # $client - Socket connected to the client.
3812: # Returns:
3813: # 1 indicating processing can continue.
3814: # Side effects:
3815: # A file is created in the local filesystem.
3816: # A reply is sent to the client.
3817: sub tmp_put_handler {
3818: my ($cmd, $what, $client) = @_;
3819:
3820: my $userinput = "$cmd:$what"; # Reconstruct for logging.
3821:
3822:
3823: my $store;
3824: $tmpsnum++;
3825: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
3826: $id=~s/\W/\_/g;
3827: $what=~s/\n//g;
3828: my $execdir=$perlvar{'lonDaemons'};
3829: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
3830: print $store $what;
3831: close $store;
3832: &Reply($client, "$id\n", $userinput);
3833: } else {
3834: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
3835: "while attempting tmpput\n", $userinput);
3836: }
3837: return 1;
3838:
3839: }
3840: ®ister_handler("tmpput", \&tmp_put_handler, 0, 1, 0);
1.263 albertel 3841:
1.238 foxr 3842: # Processes the tmpget command. This command returns the contents
3843: # of a temporary resource file(?) created via tmpput.
3844: #
3845: # Paramters:
3846: # $cmd - Command that got us dispatched.
3847: # $id - Tail of the command, contain the id of the resource
3848: # we want to fetch.
3849: # $client - socket open on the client.
3850: # Return:
3851: # 1 - Inidcating processing can continue.
3852: # Side effects:
3853: # A reply is sent to the client.
3854: #
3855: sub tmp_get_handler {
3856: my ($cmd, $id, $client) = @_;
3857:
3858: my $userinput = "$cmd:$id";
3859:
3860:
3861: $id=~s/\W/\_/g;
3862: my $store;
3863: my $execdir=$perlvar{'lonDaemons'};
3864: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
3865: my $reply=<$store>;
3866: &Reply( $client, "$reply\n", $userinput);
3867: close $store;
3868: } else {
3869: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
3870: "while attempting tmpget\n", $userinput);
3871: }
3872:
3873: return 1;
3874: }
3875: ®ister_handler("tmpget", \&tmp_get_handler, 0, 1, 0);
1.263 albertel 3876:
1.238 foxr 3877: #
3878: # Process the tmpdel command. This command deletes a temp resource
3879: # created by the tmpput command.
3880: #
3881: # Parameters:
3882: # $cmd - Command that got us here.
3883: # $id - Id of the temporary resource created.
3884: # $client - socket open on the client process.
3885: #
3886: # Returns:
3887: # 1 - Indicating processing should continue.
3888: # Side Effects:
3889: # A file is deleted
3890: # A reply is sent to the client.
3891: sub tmp_del_handler {
3892: my ($cmd, $id, $client) = @_;
3893:
3894: my $userinput= "$cmd:$id";
3895:
3896: chomp($id);
3897: $id=~s/\W/\_/g;
3898: my $execdir=$perlvar{'lonDaemons'};
3899: if (unlink("$execdir/tmp/$id.tmp")) {
3900: &Reply($client, "ok\n", $userinput);
3901: } else {
3902: &Failure( $client, "error: ".($!+0)."Unlink tmp Failed ".
3903: "while attempting tmpdel\n", $userinput);
3904: }
3905:
3906: return 1;
3907:
3908: }
3909: ®ister_handler("tmpdel", \&tmp_del_handler, 0, 1, 0);
1.263 albertel 3910:
1.238 foxr 3911: #
1.246 foxr 3912: # Processes the setannounce command. This command
3913: # creates a file named announce.txt in the top directory of
3914: # the documentn root and sets its contents. The announce.txt file is
3915: # printed in its entirety at the LonCAPA login page. Note:
3916: # once the announcement.txt fileis created it cannot be deleted.
3917: # However, setting the contents of the file to empty removes the
3918: # announcement from the login page of loncapa so who cares.
3919: #
3920: # Parameters:
3921: # $cmd - The command that got us dispatched.
3922: # $announcement - The text of the announcement.
3923: # $client - Socket open on the client process.
3924: # Retunrns:
3925: # 1 - Indicating request processing should continue
3926: # Side Effects:
3927: # The file {DocRoot}/announcement.txt is created.
3928: # A reply is sent to $client.
3929: #
3930: sub set_announce_handler {
3931: my ($cmd, $announcement, $client) = @_;
3932:
3933: my $userinput = "$cmd:$announcement";
3934:
3935: chomp($announcement);
3936: $announcement=&unescape($announcement);
3937: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
3938: '/announcement.txt')) {
3939: print $store $announcement;
3940: close $store;
3941: &Reply($client, "ok\n", $userinput);
3942: } else {
3943: &Failure($client, "error: ".($!+0)."\n", $userinput);
3944: }
3945:
3946: return 1;
3947: }
3948: ®ister_handler("setannounce", \&set_announce_handler, 0, 1, 0);
1.263 albertel 3949:
1.246 foxr 3950: #
3951: # Return the version of the daemon. This can be used to determine
3952: # the compatibility of cross version installations or, alternatively to
3953: # simply know who's out of date and who isn't. Note that the version
3954: # is returned concatenated with the tail.
3955: # Parameters:
3956: # $cmd - the request that dispatched to us.
3957: # $tail - Tail of the request (client's version?).
3958: # $client - Socket open on the client.
3959: #Returns:
3960: # 1 - continue processing requests.
3961: # Side Effects:
3962: # Replies with version to $client.
3963: sub get_version_handler {
3964: my ($cmd, $tail, $client) = @_;
3965:
3966: my $userinput = $cmd.$tail;
3967:
3968: &Reply($client, &version($userinput)."\n", $userinput);
3969:
3970:
3971: return 1;
3972: }
3973: ®ister_handler("version", \&get_version_handler, 0, 1, 0);
1.263 albertel 3974:
1.246 foxr 3975: # Set the current host and domain. This is used to support
3976: # multihomed systems. Each IP of the system, or even separate daemons
3977: # on the same IP can be treated as handling a separate lonCAPA virtual
3978: # machine. This command selects the virtual lonCAPA. The client always
3979: # knows the right one since it is lonc and it is selecting the domain/system
3980: # from the hosts.tab file.
3981: # Parameters:
3982: # $cmd - Command that dispatched us.
3983: # $tail - Tail of the command (domain/host requested).
3984: # $socket - Socket open on the client.
3985: #
3986: # Returns:
3987: # 1 - Indicates the program should continue to process requests.
3988: # Side-effects:
3989: # The default domain/system context is modified for this daemon.
3990: # a reply is sent to the client.
3991: #
3992: sub set_virtual_host_handler {
3993: my ($cmd, $tail, $socket) = @_;
3994:
3995: my $userinput ="$cmd:$tail";
3996:
3997: &Reply($client, &sethost($userinput)."\n", $userinput);
3998:
3999:
4000: return 1;
4001: }
1.247 albertel 4002: ®ister_handler("sethost", \&set_virtual_host_handler, 0, 1, 0);
1.246 foxr 4003:
4004: # Process a request to exit:
4005: # - "bye" is sent to the client.
4006: # - The client socket is shutdown and closed.
4007: # - We indicate to the caller that we should exit.
4008: # Formal Parameters:
4009: # $cmd - The command that got us here.
4010: # $tail - Tail of the command (empty).
4011: # $client - Socket open on the tail.
4012: # Returns:
4013: # 0 - Indicating the program should exit!!
4014: #
4015: sub exit_handler {
4016: my ($cmd, $tail, $client) = @_;
4017:
4018: my $userinput = "$cmd:$tail";
4019:
4020: &logthis("Client $clientip ($clientname) hanging up: $userinput");
4021: &Reply($client, "bye\n", $userinput);
4022: $client->shutdown(2); # shutdown the socket forcibly.
4023: $client->close();
4024:
4025: return 0;
4026: }
1.248 foxr 4027: ®ister_handler("exit", \&exit_handler, 0,1,1);
4028: ®ister_handler("init", \&exit_handler, 0,1,1);
4029: ®ister_handler("quit", \&exit_handler, 0,1,1);
4030:
4031: # Determine if auto-enrollment is enabled.
4032: # Note that the original had what I believe to be a defect.
4033: # The original returned 0 if the requestor was not a registerd client.
4034: # It should return "refused".
4035: # Formal Parameters:
4036: # $cmd - The command that invoked us.
4037: # $tail - The tail of the command (Extra command parameters.
4038: # $client - The socket open on the client that issued the request.
4039: # Returns:
4040: # 1 - Indicating processing should continue.
4041: #
4042: sub enrollment_enabled_handler {
4043: my ($cmd, $tail, $client) = @_;
4044: my $userinput = $cmd.":".$tail; # For logging purposes.
4045:
4046:
4047: my $cdom = split(/:/, $tail); # Domain we're asking about.
4048: my $outcome = &localenroll::run($cdom);
4049: &Reply($client, "$outcome\n", $userinput);
4050:
4051: return 1;
4052: }
4053: ®ister_handler("autorun", \&enrollment_enabled_handler, 0, 1, 0);
4054:
4055: # Get the official sections for which auto-enrollment is possible.
4056: # Since the admin people won't know about 'unofficial sections'
4057: # we cannot auto-enroll on them.
4058: # Formal Parameters:
4059: # $cmd - The command request that got us dispatched here.
4060: # $tail - The remainder of the request. In our case this
4061: # will be split into:
4062: # $coursecode - The course name from the admin point of view.
4063: # $cdom - The course's domain(?).
4064: # $client - Socket open on the client.
4065: # Returns:
4066: # 1 - Indiciting processing should continue.
4067: #
4068: sub get_sections_handler {
4069: my ($cmd, $tail, $client) = @_;
4070: my $userinput = "$cmd:$tail";
4071:
4072: my ($coursecode, $cdom) = split(/:/, $tail);
4073: my @secs = &localenroll::get_sections($coursecode,$cdom);
4074: my $seclist = &escape(join(':',@secs));
4075:
4076: &Reply($client, "$seclist\n", $userinput);
4077:
4078:
4079: return 1;
4080: }
4081: ®ister_handler("autogetsections", \&get_sections_handler, 0, 1, 0);
4082:
4083: # Validate the owner of a new course section.
4084: #
4085: # Formal Parameters:
4086: # $cmd - Command that got us dispatched.
4087: # $tail - the remainder of the command. For us this consists of a
4088: # colon separated string containing:
4089: # $inst - Course Id from the institutions point of view.
4090: # $owner - Proposed owner of the course.
4091: # $cdom - Domain of the course (from the institutions
4092: # point of view?)..
4093: # $client - Socket open on the client.
4094: #
4095: # Returns:
4096: # 1 - Processing should continue.
4097: #
4098: sub validate_course_owner_handler {
4099: my ($cmd, $tail, $client) = @_;
4100: my $userinput = "$cmd:$tail";
4101: my ($inst_course_id, $owner, $cdom) = split(/:/, $tail);
4102:
4103: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom);
4104: &Reply($client, "$outcome\n", $userinput);
4105:
4106:
4107:
4108: return 1;
4109: }
4110: ®ister_handler("autonewcourse", \&validate_course_owner_handler, 0, 1, 0);
1.263 albertel 4111:
1.248 foxr 4112: #
4113: # Validate a course section in the official schedule of classes
4114: # from the institutions point of view (part of autoenrollment).
4115: #
4116: # Formal Parameters:
4117: # $cmd - The command request that got us dispatched.
4118: # $tail - The tail of the command. In this case,
4119: # this is a colon separated set of words that will be split
4120: # into:
4121: # $inst_course_id - The course/section id from the
4122: # institutions point of view.
4123: # $cdom - The domain from the institutions
4124: # point of view.
4125: # $client - Socket open on the client.
4126: # Returns:
4127: # 1 - Indicating processing should continue.
4128: #
4129: sub validate_course_section_handler {
4130: my ($cmd, $tail, $client) = @_;
4131: my $userinput = "$cmd:$tail";
4132: my ($inst_course_id, $cdom) = split(/:/, $tail);
4133:
4134: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
4135: &Reply($client, "$outcome\n", $userinput);
4136:
4137:
4138: return 1;
4139: }
4140: ®ister_handler("autovalidatecourse", \&validate_course_section_handler, 0, 1, 0);
4141:
4142: #
4143: # Create a password for a new auto-enrollment user.
4144: # I think/guess, this password allows access to the institutions
4145: # AIS class list server/services. Stuart can correct this comment
4146: # when he finds out how wrong I am.
4147: #
4148: # Formal Parameters:
4149: # $cmd - The command request that got us dispatched.
4150: # $tail - The tail of the command. In this case this is a colon separated
4151: # set of words that will be split into:
4152: # $authparam - An authentication parameter (username??).
4153: # $cdom - The domain of the course from the institution's
4154: # point of view.
4155: # $client - The socket open on the client.
4156: # Returns:
4157: # 1 - continue processing.
4158: #
4159: sub create_auto_enroll_password_handler {
4160: my ($cmd, $tail, $client) = @_;
4161: my $userinput = "$cmd:$tail";
4162:
4163: my ($authparam, $cdom) = split(/:/, $userinput);
4164:
4165: my ($create_passwd,$authchk);
4166: ($authparam,
4167: $create_passwd,
4168: $authchk) = &localenroll::create_password($authparam,$cdom);
4169:
4170: &Reply($client, &escape($authparam.':'.$create_passwd.':'.$authchk)."\n",
4171: $userinput);
4172:
4173:
4174: return 1;
4175: }
4176: ®ister_handler("autocreatepassword", \&create_auto_enroll_password_handler,
4177: 0, 1, 0);
4178:
4179: # Retrieve and remove temporary files created by/during autoenrollment.
4180: #
4181: # Formal Parameters:
4182: # $cmd - The command that got us dispatched.
4183: # $tail - The tail of the command. In our case this is a colon
4184: # separated list that will be split into:
4185: # $filename - The name of the file to remove.
4186: # The filename is given as a path relative to
4187: # the LonCAPA temp file directory.
4188: # $client - Socket open on the client.
4189: #
4190: # Returns:
4191: # 1 - Continue processing.
4192: sub retrieve_auto_file_handler {
4193: my ($cmd, $tail, $client) = @_;
4194: my $userinput = "cmd:$tail";
4195:
4196: my ($filename) = split(/:/, $tail);
4197:
4198: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
4199: if ( (-e $source) && ($filename ne '') ) {
4200: my $reply = '';
4201: if (open(my $fh,$source)) {
4202: while (<$fh>) {
4203: chomp($_);
4204: $_ =~ s/^\s+//g;
4205: $_ =~ s/\s+$//g;
4206: $reply .= $_;
4207: }
4208: close($fh);
4209: &Reply($client, &escape($reply)."\n", $userinput);
4210:
4211: # Does this have to be uncommented??!? (RF).
4212: #
4213: # unlink($source);
4214: } else {
4215: &Failure($client, "error\n", $userinput);
4216: }
4217: } else {
4218: &Failure($client, "error\n", $userinput);
4219: }
4220:
4221:
4222: return 1;
4223: }
4224: ®ister_handler("autoretrieve", \&retrieve_auto_file_handler, 0,1,0);
4225:
4226: #
4227: # Read and retrieve institutional code format (for support form).
4228: # Formal Parameters:
4229: # $cmd - Command that dispatched us.
4230: # $tail - Tail of the command. In this case it conatins
4231: # the course domain and the coursename.
4232: # $client - Socket open on the client.
4233: # Returns:
4234: # 1 - Continue processing.
4235: #
4236: sub get_institutional_code_format_handler {
4237: my ($cmd, $tail, $client) = @_;
4238: my $userinput = "$cmd:$tail";
4239:
4240: my $reply;
4241: my($cdom,$course) = split(/:/,$tail);
4242: my @pairs = split/\&/,$course;
4243: my %instcodes = ();
4244: my %codes = ();
4245: my @codetitles = ();
4246: my %cat_titles = ();
4247: my %cat_order = ();
4248: foreach (@pairs) {
4249: my ($key,$value) = split/=/,$_;
4250: $instcodes{&unescape($key)} = &unescape($value);
4251: }
4252: my $formatreply = &localenroll::instcode_format($cdom,
4253: \%instcodes,
4254: \%codes,
4255: \@codetitles,
4256: \%cat_titles,
4257: \%cat_order);
4258: if ($formatreply eq 'ok') {
4259: my $codes_str = &hash2str(%codes);
4260: my $codetitles_str = &array2str(@codetitles);
4261: my $cat_titles_str = &hash2str(%cat_titles);
4262: my $cat_order_str = &hash2str(%cat_order);
4263: &Reply($client,
4264: $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'
4265: .$cat_order_str."\n",
4266: $userinput);
4267: } else {
4268: # this else branch added by RF since if not ok, lonc will
4269: # hang waiting on reply until timeout.
4270: #
4271: &Reply($client, "format_error\n", $userinput);
4272: }
4273:
4274: return 1;
4275: }
1.265 albertel 4276: ®ister_handler("autoinstcodeformat",
4277: \&get_institutional_code_format_handler,0,1,0);
1.246 foxr 4278:
1.317 raeburn 4279: # Get domain specific conditions for import of student photographs to a course
4280: #
4281: # Retrieves information from photo_permission subroutine in localenroll.
4282: # Returns outcome (ok) if no processing errors, and whether course owner is
4283: # required to accept conditions of use (yes/no).
4284: #
4285: #
4286: sub photo_permission_handler {
4287: my ($cmd, $tail, $client) = @_;
4288: my $userinput = "$cmd:$tail";
4289: my $cdom = $tail;
4290: my ($perm_reqd,$conditions);
1.320 albertel 4291: my $outcome;
4292: eval {
4293: local($SIG{__DIE__})='DEFAULT';
4294: $outcome = &localenroll::photo_permission($cdom,\$perm_reqd,
4295: \$conditions);
4296: };
4297: if (!$@) {
4298: &Reply($client, &escape($outcome.':'.$perm_reqd.':'. $conditions)."\n",
4299: $userinput);
4300: } else {
4301: &Failure($client,"unknown_cmd\n",$userinput);
4302: }
4303: return 1;
1.317 raeburn 4304: }
4305: ®ister_handler("autophotopermission",\&photo_permission_handler,0,1,0);
4306:
4307: #
4308: # Checks if student photo is available for a user in the domain, in the user's
4309: # directory (in /userfiles/internal/studentphoto.jpg).
4310: # Uses localstudentphoto:fetch() to ensure there is an up to date copy of
4311: # the student's photo.
4312:
4313: sub photo_check_handler {
4314: my ($cmd, $tail, $client) = @_;
4315: my $userinput = "$cmd:$tail";
4316: my ($udom,$uname,$pid) = split(/:/,$tail);
4317: $udom = &unescape($udom);
4318: $uname = &unescape($uname);
4319: $pid = &unescape($pid);
4320: my $path=&propath($udom,$uname).'/userfiles/internal/';
4321: if (!-e $path) {
4322: &mkpath($path);
4323: }
4324: my $response;
4325: my $result = &localstudentphoto::fetch($udom,$uname,$pid,\$response);
4326: $result .= ':'.$response;
4327: &Reply($client, &escape($result)."\n",$userinput);
1.320 albertel 4328: return 1;
1.317 raeburn 4329: }
4330: ®ister_handler("autophotocheck",\&photo_check_handler,0,1,0);
4331:
4332: #
4333: # Retrieve information from localenroll about whether to provide a button
4334: # for users who have enbled import of student photos to initiate an
4335: # update of photo files for registered students. Also include
4336: # comment to display alongside button.
4337:
4338: sub photo_choice_handler {
4339: my ($cmd, $tail, $client) = @_;
4340: my $userinput = "$cmd:$tail";
4341: my $cdom = &unescape($tail);
1.320 albertel 4342: my ($update,$comment);
4343: eval {
4344: local($SIG{__DIE__})='DEFAULT';
4345: ($update,$comment) = &localenroll::manager_photo_update($cdom);
4346: };
4347: if (!$@) {
4348: &Reply($client,&escape($update).':'.&escape($comment)."\n",$userinput);
4349: } else {
4350: &Failure($client,"unknown_cmd\n",$userinput);
4351: }
4352: return 1;
1.317 raeburn 4353: }
4354: ®ister_handler("autophotochoice",\&photo_choice_handler,0,1,0);
4355:
1.265 albertel 4356: #
4357: # Gets a student's photo to exist (in the correct image type) in the user's
4358: # directory.
4359: # Formal Parameters:
4360: # $cmd - The command request that got us dispatched.
4361: # $tail - A colon separated set of words that will be split into:
4362: # $domain - student's domain
4363: # $uname - student username
4364: # $type - image type desired
4365: # $client - The socket open on the client.
4366: # Returns:
4367: # 1 - continue processing.
1.317 raeburn 4368:
1.265 albertel 4369: sub student_photo_handler {
4370: my ($cmd, $tail, $client) = @_;
1.317 raeburn 4371: my ($domain,$uname,$ext,$type) = split(/:/, $tail);
1.265 albertel 4372:
1.317 raeburn 4373: my $path=&propath($domain,$uname). '/userfiles/internal/';
4374: my $filename = 'studentphoto.'.$ext;
4375: if ($type eq 'thumbnail') {
4376: $filename = 'studentphoto_tn.'.$ext;
4377: }
4378: if (-e $path.$filename) {
1.265 albertel 4379: &Reply($client,"ok\n","$cmd:$tail");
4380: return 1;
4381: }
4382: &mkpath($path);
1.317 raeburn 4383: my $file;
4384: if ($type eq 'thumbnail') {
1.320 albertel 4385: eval {
4386: local($SIG{__DIE__})='DEFAULT';
4387: $file=&localstudentphoto::fetch_thumbnail($domain,$uname);
4388: };
1.317 raeburn 4389: } else {
4390: $file=&localstudentphoto::fetch($domain,$uname);
4391: }
1.265 albertel 4392: if (!$file) {
4393: &Failure($client,"unavailable\n","$cmd:$tail");
4394: return 1;
4395: }
1.317 raeburn 4396: if (!-e $path.$filename) { &convert_photo($file,$path.$filename); }
4397: if (-e $path.$filename) {
1.265 albertel 4398: &Reply($client,"ok\n","$cmd:$tail");
4399: return 1;
4400: }
4401: &Failure($client,"unable_to_convert\n","$cmd:$tail");
4402: return 1;
4403: }
4404: ®ister_handler("studentphoto", \&student_photo_handler, 0, 1, 0);
1.246 foxr 4405:
1.264 albertel 4406: # mkpath makes all directories for a file, expects an absolute path with a
4407: # file or a trailing / if just a dir is passed
4408: # returns 1 on success 0 on failure
4409: sub mkpath {
4410: my ($file)=@_;
4411: my @parts=split(/\//,$file,-1);
4412: my $now=$parts[0].'/'.$parts[1].'/'.$parts[2];
4413: for (my $i=3;$i<= ($#parts-1);$i++) {
1.265 albertel 4414: $now.='/'.$parts[$i];
1.264 albertel 4415: if (!-e $now) {
4416: if (!mkdir($now,0770)) { return 0; }
4417: }
4418: }
4419: return 1;
4420: }
4421:
1.207 foxr 4422: #---------------------------------------------------------------
4423: #
4424: # Getting, decoding and dispatching requests:
4425: #
4426: #
4427: # Get a Request:
4428: # Gets a Request message from the client. The transaction
4429: # is defined as a 'line' of text. We remove the new line
4430: # from the text line.
1.226 foxr 4431: #
1.211 albertel 4432: sub get_request {
1.207 foxr 4433: my $input = <$client>;
4434: chomp($input);
1.226 foxr 4435:
1.234 foxr 4436: &Debug("get_request: Request = $input\n");
1.207 foxr 4437:
4438: &status('Processing '.$clientname.':'.$input);
4439:
4440: return $input;
4441: }
1.212 foxr 4442: #---------------------------------------------------------------
4443: #
4444: # Process a request. This sub should shrink as each action
4445: # gets farmed out into a separat sub that is registered
4446: # with the dispatch hash.
4447: #
4448: # Parameters:
4449: # user_input - The request received from the client (lonc).
4450: # Returns:
4451: # true to keep processing, false if caller should exit.
4452: #
4453: sub process_request {
4454: my ($userinput) = @_; # Easier for now to break style than to
4455: # fix all the userinput -> user_input.
4456: my $wasenc = 0; # True if request was encrypted.
4457: # ------------------------------------------------------------ See if encrypted
1.322 albertel 4458: # for command
4459: # sethost:<server>
4460: # <command>:<args>
4461: # we just send it to the processor
4462: # for
4463: # sethost:<server>:<command>:<args>
4464: # we do the implict set host and then do the command
4465: if ($userinput =~ /^sethost:/) {
4466: (my $cmd,my $newid,$userinput) = split(':',$userinput,3);
4467: if (defined($userinput)) {
4468: &sethost("$cmd:$newid");
4469: } else {
4470: $userinput = "$cmd:$newid";
4471: }
4472: }
4473:
1.212 foxr 4474: if ($userinput =~ /^enc/) {
4475: $userinput = decipher($userinput);
4476: $wasenc=1;
4477: if(!$userinput) { # Cipher not defined.
1.251 foxr 4478: &Failure($client, "error: Encrypted data without negotated key\n");
1.212 foxr 4479: return 0;
4480: }
4481: }
4482: Debug("process_request: $userinput\n");
4483:
1.213 foxr 4484: #
4485: # The 'correct way' to add a command to lond is now to
4486: # write a sub to execute it and Add it to the command dispatch
4487: # hash via a call to register_handler.. The comments to that
4488: # sub should give you enough to go on to show how to do this
4489: # along with the examples that are building up as this code
4490: # is getting refactored. Until all branches of the
4491: # if/elseif monster below have been factored out into
4492: # separate procesor subs, if the dispatch hash is missing
4493: # the command keyword, we will fall through to the remainder
4494: # of the if/else chain below in order to keep this thing in
4495: # working order throughout the transmogrification.
4496:
4497: my ($command, $tail) = split(/:/, $userinput, 2);
4498: chomp($command);
4499: chomp($tail);
4500: $tail =~ s/(\r)//; # This helps people debugging with e.g. telnet.
1.214 foxr 4501: $command =~ s/(\r)//; # And this too for parameterless commands.
4502: if(!$tail) {
4503: $tail =""; # defined but blank.
4504: }
1.213 foxr 4505:
4506: &Debug("Command received: $command, encoded = $wasenc");
4507:
4508: if(defined $Dispatcher{$command}) {
4509:
4510: my $dispatch_info = $Dispatcher{$command};
4511: my $handler = $$dispatch_info[0];
4512: my $need_encode = $$dispatch_info[1];
4513: my $client_types = $$dispatch_info[2];
4514: Debug("Matched dispatch hash: mustencode: $need_encode "
4515: ."ClientType $client_types");
4516:
4517: # Validate the request:
4518:
4519: my $ok = 1;
4520: my $requesterprivs = 0;
4521: if(&isClient()) {
4522: $requesterprivs |= $CLIENT_OK;
4523: }
4524: if(&isManager()) {
4525: $requesterprivs |= $MANAGER_OK;
4526: }
4527: if($need_encode && (!$wasenc)) {
4528: Debug("Must encode but wasn't: $need_encode $wasenc");
4529: $ok = 0;
4530: }
4531: if(($client_types & $requesterprivs) == 0) {
4532: Debug("Client not privileged to do this operation");
4533: $ok = 0;
4534: }
4535:
4536: if($ok) {
4537: Debug("Dispatching to handler $command $tail");
4538: my $keep_going = &$handler($command, $tail, $client);
4539: return $keep_going;
4540: } else {
4541: Debug("Refusing to dispatch because client did not match requirements");
4542: Failure($client, "refused\n", $userinput);
4543: return 1;
4544: }
4545:
4546: }
4547:
1.262 foxr 4548: print $client "unknown_cmd\n";
1.212 foxr 4549: # -------------------------------------------------------------------- complete
4550: Debug("process_request - returning 1");
4551: return 1;
4552: }
1.207 foxr 4553: #
4554: # Decipher encoded traffic
4555: # Parameters:
4556: # input - Encoded data.
4557: # Returns:
4558: # Decoded data or undef if encryption key was not yet negotiated.
4559: # Implicit input:
4560: # cipher - This global holds the negotiated encryption key.
4561: #
1.211 albertel 4562: sub decipher {
1.207 foxr 4563: my ($input) = @_;
4564: my $output = '';
1.212 foxr 4565:
4566:
1.207 foxr 4567: if($cipher) {
4568: my($enc, $enclength, $encinput) = split(/:/, $input);
4569: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
4570: $output .=
4571: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
4572: }
4573: return substr($output, 0, $enclength);
4574: } else {
4575: return undef;
4576: }
4577: }
4578:
4579: #
4580: # Register a command processor. This function is invoked to register a sub
4581: # to process a request. Once registered, the ProcessRequest sub can automatically
4582: # dispatch requests to an appropriate sub, and do the top level validity checking
4583: # as well:
4584: # - Is the keyword recognized.
4585: # - Is the proper client type attempting the request.
4586: # - Is the request encrypted if it has to be.
4587: # Parameters:
4588: # $request_name - Name of the request being registered.
4589: # This is the command request that will match
4590: # against the hash keywords to lookup the information
4591: # associated with the dispatch information.
4592: # $procedure - Reference to a sub to call to process the request.
4593: # All subs get called as follows:
4594: # Procedure($cmd, $tail, $replyfd, $key)
4595: # $cmd - the actual keyword that invoked us.
4596: # $tail - the tail of the request that invoked us.
4597: # $replyfd- File descriptor connected to the client
4598: # $must_encode - True if the request must be encoded to be good.
4599: # $client_ok - True if it's ok for a client to request this.
4600: # $manager_ok - True if it's ok for a manager to request this.
4601: # Side effects:
4602: # - On success, the Dispatcher hash has an entry added for the key $RequestName
4603: # - On failure, the program will die as it's a bad internal bug to try to
4604: # register a duplicate command handler.
4605: #
1.211 albertel 4606: sub register_handler {
1.212 foxr 4607: my ($request_name,$procedure,$must_encode, $client_ok,$manager_ok) = @_;
1.207 foxr 4608:
4609: # Don't allow duplication#
4610:
4611: if (defined $Dispatcher{$request_name}) {
4612: die "Attempting to define a duplicate request handler for $request_name\n";
4613: }
4614: # Build the client type mask:
4615:
4616: my $client_type_mask = 0;
4617: if($client_ok) {
4618: $client_type_mask |= $CLIENT_OK;
4619: }
4620: if($manager_ok) {
4621: $client_type_mask |= $MANAGER_OK;
4622: }
4623:
4624: # Enter the hash:
4625:
4626: my @entry = ($procedure, $must_encode, $client_type_mask);
4627:
4628: $Dispatcher{$request_name} = \@entry;
4629:
4630: }
4631:
4632:
4633: #------------------------------------------------------------------
4634:
4635:
4636:
4637:
1.141 foxr 4638: #
1.96 foxr 4639: # Convert an error return code from lcpasswd to a string value.
4640: #
4641: sub lcpasswdstrerror {
4642: my $ErrorCode = shift;
1.97 foxr 4643: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
1.96 foxr 4644: return "lcpasswd Unrecognized error return value ".$ErrorCode;
4645: } else {
1.98 foxr 4646: return $passwderrors[$ErrorCode];
1.96 foxr 4647: }
4648: }
4649:
1.97 foxr 4650: #
4651: # Convert an error return code from lcuseradd to a string value:
4652: #
4653: sub lcuseraddstrerror {
4654: my $ErrorCode = shift;
4655: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
4656: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
4657: } else {
1.98 foxr 4658: return $adderrors[$ErrorCode];
1.97 foxr 4659: }
4660: }
4661:
1.23 harris41 4662: # grabs exception and records it to log before exiting
4663: sub catchexception {
1.27 albertel 4664: my ($error)=@_;
1.25 www 4665: $SIG{'QUIT'}='DEFAULT';
4666: $SIG{__DIE__}='DEFAULT';
1.165 albertel 4667: &status("Catching exception");
1.190 albertel 4668: &logthis("<font color='red'>CRITICAL: "
1.134 albertel 4669: ."ABNORMAL EXIT. Child $$ for server $thisserver died through "
1.27 albertel 4670: ."a crash with this error msg->[$error]</font>");
1.57 www 4671: &logthis('Famous last words: '.$status.' - '.$lastlog);
1.27 albertel 4672: if ($client) { print $client "error: $error\n"; }
1.59 www 4673: $server->close();
1.27 albertel 4674: die($error);
1.23 harris41 4675: }
1.63 www 4676: sub timeout {
1.165 albertel 4677: &status("Handling Timeout");
1.190 albertel 4678: &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
1.63 www 4679: &catchexception('Timeout');
4680: }
1.22 harris41 4681: # -------------------------------- Set signal handlers to record abnormal exits
4682:
1.226 foxr 4683:
1.22 harris41 4684: $SIG{'QUIT'}=\&catchexception;
4685: $SIG{__DIE__}=\&catchexception;
4686:
1.81 matthew 4687: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
1.95 harris41 4688: &status("Read loncapa.conf and loncapa_apache.conf");
4689: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
1.141 foxr 4690: %perlvar=%{$perlvarref};
1.80 harris41 4691: undef $perlvarref;
1.19 www 4692:
1.35 harris41 4693: # ----------------------------- Make sure this process is running from user=www
4694: my $wwwid=getpwnam('www');
4695: if ($wwwid!=$<) {
1.134 albertel 4696: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
4697: my $subj="LON: $currenthostid User ID mismatch";
1.37 harris41 4698: system("echo 'User ID mismatch. lond must be run as user www.' |\
1.35 harris41 4699: mailto $emailto -s '$subj' > /dev/null");
4700: exit 1;
4701: }
4702:
1.19 www 4703: # --------------------------------------------- Check if other instance running
4704:
4705: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
4706:
4707: if (-e $pidfile) {
4708: my $lfh=IO::File->new("$pidfile");
4709: my $pide=<$lfh>;
4710: chomp($pide);
1.29 harris41 4711: if (kill 0 => $pide) { die "already running"; }
1.19 www 4712: }
1.1 albertel 4713:
4714: # ------------------------------------------------------------- Read hosts file
4715:
4716:
4717:
4718: # establish SERVER socket, bind and listen.
4719: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
4720: Type => SOCK_STREAM,
4721: Proto => 'tcp',
4722: Reuse => 1,
4723: Listen => 10 )
1.29 harris41 4724: or die "making socket: $@\n";
1.1 albertel 4725:
4726: # --------------------------------------------------------- Do global variables
4727:
4728: # global variables
4729:
1.134 albertel 4730: my %children = (); # keys are current child process IDs
1.1 albertel 4731:
4732: sub REAPER { # takes care of dead children
4733: $SIG{CHLD} = \&REAPER;
1.165 albertel 4734: &status("Handling child death");
1.178 foxr 4735: my $pid;
4736: do {
4737: $pid = waitpid(-1,&WNOHANG());
4738: if (defined($children{$pid})) {
4739: &logthis("Child $pid died");
4740: delete($children{$pid});
1.183 albertel 4741: } elsif ($pid > 0) {
1.178 foxr 4742: &logthis("Unknown Child $pid died");
4743: }
4744: } while ( $pid > 0 );
4745: foreach my $child (keys(%children)) {
4746: $pid = waitpid($child,&WNOHANG());
4747: if ($pid > 0) {
4748: &logthis("Child $child - $pid looks like we missed it's death");
4749: delete($children{$pid});
4750: }
1.176 albertel 4751: }
1.165 albertel 4752: &status("Finished Handling child death");
1.1 albertel 4753: }
4754:
4755: sub HUNTSMAN { # signal handler for SIGINT
1.165 albertel 4756: &status("Killing children (INT)");
1.1 albertel 4757: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
4758: kill 'INT' => keys %children;
1.59 www 4759: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.1 albertel 4760: my $execdir=$perlvar{'lonDaemons'};
4761: unlink("$execdir/logs/lond.pid");
1.190 albertel 4762: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
1.165 albertel 4763: &status("Done killing children");
1.1 albertel 4764: exit; # clean up with dignity
4765: }
4766:
4767: sub HUPSMAN { # signal handler for SIGHUP
4768: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
1.165 albertel 4769: &status("Killing children for restart (HUP)");
1.1 albertel 4770: kill 'INT' => keys %children;
1.59 www 4771: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.190 albertel 4772: &logthis("<font color='red'>CRITICAL: Restarting</font>");
1.134 albertel 4773: my $execdir=$perlvar{'lonDaemons'};
1.30 harris41 4774: unlink("$execdir/logs/lond.pid");
1.165 albertel 4775: &status("Restarting self (HUP)");
1.1 albertel 4776: exec("$execdir/lond"); # here we go again
4777: }
4778:
1.144 foxr 4779: #
1.148 foxr 4780: # Kill off hashes that describe the host table prior to re-reading it.
4781: # Hashes affected are:
1.200 matthew 4782: # %hostid, %hostdom %hostip %hostdns.
1.148 foxr 4783: #
4784: sub KillHostHashes {
4785: foreach my $key (keys %hostid) {
4786: delete $hostid{$key};
4787: }
4788: foreach my $key (keys %hostdom) {
4789: delete $hostdom{$key};
4790: }
4791: foreach my $key (keys %hostip) {
4792: delete $hostip{$key};
4793: }
1.200 matthew 4794: foreach my $key (keys %hostdns) {
4795: delete $hostdns{$key};
4796: }
1.148 foxr 4797: }
4798: #
4799: # Read in the host table from file and distribute it into the various hashes:
4800: #
4801: # - %hostid - Indexed by IP, the loncapa hostname.
4802: # - %hostdom - Indexed by loncapa hostname, the domain.
4803: # - %hostip - Indexed by hostid, the Ip address of the host.
4804: sub ReadHostTable {
4805:
4806: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
1.200 matthew 4807: my $myloncapaname = $perlvar{'lonHostID'};
4808: Debug("My loncapa name is : $myloncapaname");
1.296 albertel 4809: my %name_to_ip;
1.148 foxr 4810: while (my $configline=<CONFIG>) {
1.277 albertel 4811: if ($configline !~ /^\s*\#/ && $configline !~ /^\s*$/ ) {
4812: my ($id,$domain,$role,$name)=split(/:/,$configline);
4813: $name=~s/\s//g;
1.296 albertel 4814: my $ip;
4815: if (!exists($name_to_ip{$name})) {
4816: $ip = gethostbyname($name);
4817: if (!$ip || length($ip) ne 4) {
4818: &logthis("Skipping host $id name $name no IP found\n");
4819: next;
4820: }
4821: $ip=inet_ntoa($ip);
4822: $name_to_ip{$name} = $ip;
4823: } else {
4824: $ip = $name_to_ip{$name};
1.277 albertel 4825: }
1.200 matthew 4826: $hostid{$ip}=$id; # LonCAPA name of host by IP.
4827: $hostdom{$id}=$domain; # LonCAPA domain name of host.
1.307 albertel 4828: $hostname{$id}=$name; # LonCAPA name -> DNS name
1.277 albertel 4829: $hostip{$id}=$ip; # IP address of host.
1.200 matthew 4830: $hostdns{$name} = $id; # LonCAPA name of host by DNS.
4831:
4832: if ($id eq $perlvar{'lonHostID'}) {
4833: Debug("Found me in the host table: $name");
4834: $thisserver=$name;
4835: }
1.178 foxr 4836: }
1.148 foxr 4837: }
4838: close(CONFIG);
4839: }
4840: #
4841: # Reload the Apache daemon's state.
1.150 foxr 4842: # This is done by invoking /home/httpd/perl/apachereload
4843: # a setuid perl script that can be root for us to do this job.
1.148 foxr 4844: #
4845: sub ReloadApache {
1.150 foxr 4846: my $execdir = $perlvar{'lonDaemons'};
4847: my $script = $execdir."/apachereload";
4848: system($script);
1.148 foxr 4849: }
4850:
4851: #
1.144 foxr 4852: # Called in response to a USR2 signal.
4853: # - Reread hosts.tab
4854: # - All children connected to hosts that were removed from hosts.tab
4855: # are killed via SIGINT
4856: # - All children connected to previously existing hosts are sent SIGUSR1
4857: # - Our internal hosts hash is updated to reflect the new contents of
4858: # hosts.tab causing connections from hosts added to hosts.tab to
4859: # now be honored.
4860: #
4861: sub UpdateHosts {
1.165 albertel 4862: &status("Reload hosts.tab");
1.147 foxr 4863: logthis('<font color="blue"> Updating connections </font>');
1.148 foxr 4864: #
4865: # The %children hash has the set of IP's we currently have children
4866: # on. These need to be matched against records in the hosts.tab
4867: # Any ip's no longer in the table get killed off they correspond to
4868: # either dropped or changed hosts. Note that the re-read of the table
4869: # will take care of new and changed hosts as connections come into being.
4870:
4871:
4872: KillHostHashes;
4873: ReadHostTable;
4874:
4875: foreach my $child (keys %children) {
4876: my $childip = $children{$child};
4877: if(!$hostid{$childip}) {
1.149 foxr 4878: logthis('<font color="blue"> UpdateHosts killing child '
4879: ." $child for ip $childip </font>");
1.148 foxr 4880: kill('INT', $child);
1.149 foxr 4881: } else {
4882: logthis('<font color="green"> keeping child for ip '
4883: ." $childip (pid=$child) </font>");
1.148 foxr 4884: }
4885: }
4886: ReloadApache;
1.165 albertel 4887: &status("Finished reloading hosts.tab");
1.144 foxr 4888: }
4889:
1.148 foxr 4890:
1.57 www 4891: sub checkchildren {
1.165 albertel 4892: &status("Checking on the children (sending signals)");
1.57 www 4893: &initnewstatus();
4894: &logstatus();
4895: &logthis('Going to check on the children');
1.134 albertel 4896: my $docdir=$perlvar{'lonDocRoot'};
1.61 harris41 4897: foreach (sort keys %children) {
1.221 albertel 4898: #sleep 1;
1.57 www 4899: unless (kill 'USR1' => $_) {
4900: &logthis ('Child '.$_.' is dead');
4901: &logstatus($$.' is dead');
1.221 albertel 4902: delete($children{$_});
1.57 www 4903: }
1.61 harris41 4904: }
1.63 www 4905: sleep 5;
1.212 foxr 4906: $SIG{ALRM} = sub { Debug("timeout");
4907: die "timeout"; };
1.113 albertel 4908: $SIG{__DIE__} = 'DEFAULT';
1.165 albertel 4909: &status("Checking on the children (waiting for reports)");
1.63 www 4910: foreach (sort keys %children) {
4911: unless (-e "$docdir/lon-status/londchld/$_.txt") {
1.113 albertel 4912: eval {
4913: alarm(300);
1.63 www 4914: &logthis('Child '.$_.' did not respond');
1.67 albertel 4915: kill 9 => $_;
1.131 albertel 4916: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
4917: #$subj="LON: $currenthostid killed lond process $_";
4918: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
4919: #$execdir=$perlvar{'lonDaemons'};
4920: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
1.221 albertel 4921: delete($children{$_});
1.113 albertel 4922: alarm(0);
4923: }
1.63 www 4924: }
4925: }
1.113 albertel 4926: $SIG{ALRM} = 'DEFAULT';
1.155 albertel 4927: $SIG{__DIE__} = \&catchexception;
1.165 albertel 4928: &status("Finished checking children");
1.221 albertel 4929: &logthis('Finished Checking children');
1.57 www 4930: }
4931:
1.1 albertel 4932: # --------------------------------------------------------------------- Logging
4933:
4934: sub logthis {
4935: my $message=shift;
4936: my $execdir=$perlvar{'lonDaemons'};
4937: my $fh=IO::File->new(">>$execdir/logs/lond.log");
4938: my $now=time;
4939: my $local=localtime($now);
1.58 www 4940: $lastlog=$local.': '.$message;
1.1 albertel 4941: print $fh "$local ($$): $message\n";
4942: }
4943:
1.77 foxr 4944: # ------------------------- Conditional log if $DEBUG true.
4945: sub Debug {
4946: my $message = shift;
4947: if($DEBUG) {
4948: &logthis($message);
4949: }
4950: }
1.161 foxr 4951:
4952: #
4953: # Sub to do replies to client.. this gives a hook for some
4954: # debug tracing too:
4955: # Parameters:
4956: # fd - File open on client.
4957: # reply - Text to send to client.
4958: # request - Original request from client.
4959: #
4960: sub Reply {
1.192 foxr 4961: my ($fd, $reply, $request) = @_;
1.161 foxr 4962: print $fd $reply;
4963: Debug("Request was $request Reply was $reply");
4964:
1.212 foxr 4965: $Transactions++;
4966: }
4967:
4968:
4969: #
4970: # Sub to report a failure.
4971: # This function:
4972: # - Increments the failure statistic counters.
4973: # - Invokes Reply to send the error message to the client.
4974: # Parameters:
4975: # fd - File descriptor open on the client
4976: # reply - Reply text to emit.
4977: # request - The original request message (used by Reply
4978: # to debug if that's enabled.
4979: # Implicit outputs:
4980: # $Failures- The number of failures is incremented.
4981: # Reply (invoked here) sends a message to the
4982: # client:
4983: #
4984: sub Failure {
4985: my $fd = shift;
4986: my $reply = shift;
4987: my $request = shift;
4988:
4989: $Failures++;
4990: Reply($fd, $reply, $request); # That's simple eh?
1.161 foxr 4991: }
1.57 www 4992: # ------------------------------------------------------------------ Log status
4993:
4994: sub logstatus {
1.178 foxr 4995: &status("Doing logging");
4996: my $docdir=$perlvar{'lonDocRoot'};
4997: {
4998: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
1.200 matthew 4999: print $fh $status."\n".$lastlog."\n".time."\n$keymode";
1.178 foxr 5000: $fh->close();
5001: }
1.221 albertel 5002: &status("Finished $$.txt");
5003: {
5004: open(LOG,">>$docdir/lon-status/londstatus.txt");
5005: flock(LOG,LOCK_EX);
5006: print LOG $$."\t".$clientname."\t".$currenthostid."\t"
5007: .$status."\t".$lastlog."\t $keymode\n";
1.275 albertel 5008: flock(LOG,LOCK_UN);
1.221 albertel 5009: close(LOG);
5010: }
1.178 foxr 5011: &status("Finished logging");
1.57 www 5012: }
5013:
5014: sub initnewstatus {
5015: my $docdir=$perlvar{'lonDocRoot'};
5016: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
5017: my $now=time;
5018: my $local=localtime($now);
5019: print $fh "LOND status $local - parent $$\n\n";
1.64 www 5020: opendir(DIR,"$docdir/lon-status/londchld");
1.134 albertel 5021: while (my $filename=readdir(DIR)) {
1.64 www 5022: unlink("$docdir/lon-status/londchld/$filename");
5023: }
5024: closedir(DIR);
1.57 www 5025: }
5026:
5027: # -------------------------------------------------------------- Status setting
5028:
5029: sub status {
5030: my $what=shift;
5031: my $now=time;
5032: my $local=localtime($now);
1.178 foxr 5033: $status=$local.': '.$what;
5034: $0='lond: '.$what.' '.$local;
1.57 www 5035: }
1.11 www 5036:
1.1 albertel 5037: # ----------------------------------------------------------- Send USR1 to lonc
5038:
5039: sub reconlonc {
5040: my $peerfile=shift;
5041: &logthis("Trying to reconnect for $peerfile");
5042: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
5043: if (my $fh=IO::File->new("$loncfile")) {
5044: my $loncpid=<$fh>;
5045: chomp($loncpid);
5046: if (kill 0 => $loncpid) {
5047: &logthis("lonc at pid $loncpid responding, sending USR1");
5048: kill USR1 => $loncpid;
5049: } else {
1.9 www 5050: &logthis(
1.190 albertel 5051: "<font color='red'>CRITICAL: "
1.9 www 5052: ."lonc at pid $loncpid not responding, giving up</font>");
1.1 albertel 5053: }
5054: } else {
1.190 albertel 5055: &logthis('<font color="red">CRITICAL: lonc not running, giving up</font>');
1.1 albertel 5056: }
5057: }
5058:
5059: # -------------------------------------------------- Non-critical communication
1.11 www 5060:
1.1 albertel 5061: sub subreply {
5062: my ($cmd,$server)=@_;
1.307 albertel 5063: my $peerfile="$perlvar{'lonSockDir'}/".$hostname{$server};
1.1 albertel 5064: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
5065: Type => SOCK_STREAM,
5066: Timeout => 10)
5067: or return "con_lost";
1.307 albertel 5068: print $sclient "sethost:$server:$cmd\n";
1.1 albertel 5069: my $answer=<$sclient>;
5070: chomp($answer);
5071: if (!$answer) { $answer="con_lost"; }
5072: return $answer;
5073: }
5074:
5075: sub reply {
5076: my ($cmd,$server)=@_;
5077: my $answer;
1.115 albertel 5078: if ($server ne $currenthostid) {
1.1 albertel 5079: $answer=subreply($cmd,$server);
5080: if ($answer eq 'con_lost') {
5081: $answer=subreply("ping",$server);
5082: if ($answer ne $server) {
1.115 albertel 5083: &logthis("sub reply: answer != server answer is $answer, server is $server");
1.307 albertel 5084: &reconlonc("$perlvar{'lonSockDir'}/".$hostname{$server});
1.1 albertel 5085: }
5086: $answer=subreply($cmd,$server);
5087: }
5088: } else {
5089: $answer='self_reply';
5090: }
5091: return $answer;
5092: }
5093:
1.13 www 5094: # -------------------------------------------------------------- Talk to lonsql
5095:
1.234 foxr 5096: sub sql_reply {
1.12 harris41 5097: my ($cmd)=@_;
1.234 foxr 5098: my $answer=&sub_sql_reply($cmd);
5099: if ($answer eq 'con_lost') { $answer=&sub_sql_reply($cmd); }
1.12 harris41 5100: return $answer;
5101: }
5102:
1.234 foxr 5103: sub sub_sql_reply {
1.12 harris41 5104: my ($cmd)=@_;
5105: my $unixsock="mysqlsock";
5106: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
5107: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
5108: Type => SOCK_STREAM,
5109: Timeout => 10)
5110: or return "con_lost";
1.319 www 5111: print $sclient "$cmd:$currentdomainid\n";
1.12 harris41 5112: my $answer=<$sclient>;
5113: chomp($answer);
5114: if (!$answer) { $answer="con_lost"; }
5115: return $answer;
5116: }
5117:
1.1 albertel 5118: # --------------------------------------- Is this the home server of an author?
1.11 www 5119:
1.1 albertel 5120: sub ishome {
5121: my $author=shift;
5122: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
5123: my ($udom,$uname)=split(/\//,$author);
5124: my $proname=propath($udom,$uname);
5125: if (-e $proname) {
5126: return 'owner';
5127: } else {
5128: return 'not_owner';
5129: }
5130: }
5131:
5132: # ======================================================= Continue main program
5133: # ---------------------------------------------------- Fork once and dissociate
5134:
1.134 albertel 5135: my $fpid=fork;
1.1 albertel 5136: exit if $fpid;
1.29 harris41 5137: die "Couldn't fork: $!" unless defined ($fpid);
1.1 albertel 5138:
1.29 harris41 5139: POSIX::setsid() or die "Can't start new session: $!";
1.1 albertel 5140:
5141: # ------------------------------------------------------- Write our PID on disk
5142:
1.134 albertel 5143: my $execdir=$perlvar{'lonDaemons'};
1.1 albertel 5144: open (PIDSAVE,">$execdir/logs/lond.pid");
5145: print PIDSAVE "$$\n";
5146: close(PIDSAVE);
1.190 albertel 5147: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
1.57 www 5148: &status('Starting');
1.1 albertel 5149:
1.106 foxr 5150:
1.1 albertel 5151:
5152: # ----------------------------------------------------- Install signal handlers
5153:
1.57 www 5154:
1.1 albertel 5155: $SIG{CHLD} = \&REAPER;
5156: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
5157: $SIG{HUP} = \&HUPSMAN;
1.57 www 5158: $SIG{USR1} = \&checkchildren;
1.144 foxr 5159: $SIG{USR2} = \&UpdateHosts;
1.106 foxr 5160:
1.148 foxr 5161: # Read the host hashes:
5162:
5163: ReadHostTable;
1.106 foxr 5164:
1.286 albertel 5165: my $dist=`$perlvar{'lonDaemons'}/distprobe`;
5166:
1.106 foxr 5167: # --------------------------------------------------------------
5168: # Accept connections. When a connection comes in, it is validated
5169: # and if good, a child process is created to process transactions
5170: # along the connection.
5171:
1.1 albertel 5172: while (1) {
1.165 albertel 5173: &status('Starting accept');
1.106 foxr 5174: $client = $server->accept() or next;
1.165 albertel 5175: &status('Accepted '.$client.' off to spawn');
1.106 foxr 5176: make_new_child($client);
1.165 albertel 5177: &status('Finished spawning');
1.1 albertel 5178: }
5179:
1.212 foxr 5180: sub make_new_child {
5181: my $pid;
5182: # my $cipher; # Now global
5183: my $sigset;
1.178 foxr 5184:
1.212 foxr 5185: $client = shift;
5186: &status('Starting new child '.$client);
5187: &logthis('<font color="green"> Attempting to start child ('.$client.
5188: ")</font>");
5189: # block signal for fork
5190: $sigset = POSIX::SigSet->new(SIGINT);
5191: sigprocmask(SIG_BLOCK, $sigset)
5192: or die "Can't block SIGINT for fork: $!\n";
1.178 foxr 5193:
1.212 foxr 5194: die "fork: $!" unless defined ($pid = fork);
1.178 foxr 5195:
1.212 foxr 5196: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
5197: # connection liveness.
1.178 foxr 5198:
1.212 foxr 5199: #
5200: # Figure out who we're talking to so we can record the peer in
5201: # the pid hash.
5202: #
5203: my $caller = getpeername($client);
5204: my ($port,$iaddr);
5205: if (defined($caller) && length($caller) > 0) {
5206: ($port,$iaddr)=unpack_sockaddr_in($caller);
5207: } else {
5208: &logthis("Unable to determine who caller was, getpeername returned nothing");
5209: }
5210: if (defined($iaddr)) {
5211: $clientip = inet_ntoa($iaddr);
5212: Debug("Connected with $clientip");
5213: } else {
5214: &logthis("Unable to determine clientip");
5215: $clientip='Unavailable';
5216: }
5217:
5218: if ($pid) {
5219: # Parent records the child's birth and returns.
5220: sigprocmask(SIG_UNBLOCK, $sigset)
5221: or die "Can't unblock SIGINT for fork: $!\n";
5222: $children{$pid} = $clientip;
5223: &status('Started child '.$pid);
5224: return;
5225: } else {
5226: # Child can *not* return from this subroutine.
5227: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
5228: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
5229: #don't get intercepted
5230: $SIG{USR1}= \&logstatus;
5231: $SIG{ALRM}= \&timeout;
5232: $lastlog='Forked ';
5233: $status='Forked';
1.178 foxr 5234:
1.212 foxr 5235: # unblock signals
5236: sigprocmask(SIG_UNBLOCK, $sigset)
5237: or die "Can't unblock SIGINT for fork: $!\n";
1.178 foxr 5238:
1.212 foxr 5239: # my $tmpsnum=0; # Now global
5240: #---------------------------------------------------- kerberos 5 initialization
5241: &Authen::Krb5::init_context();
1.297 raeburn 5242: unless (($dist eq 'fedora4') || ($dist eq 'suse9.3')) {
1.286 albertel 5243: &Authen::Krb5::init_ets();
5244: }
1.209 albertel 5245:
1.212 foxr 5246: &status('Accepted connection');
5247: # =============================================================================
5248: # do something with the connection
5249: # -----------------------------------------------------------------------------
5250: # see if we know client and 'check' for spoof IP by ineffective challenge
1.178 foxr 5251:
1.212 foxr 5252: ReadManagerTable; # May also be a manager!!
5253:
1.278 albertel 5254: my $outsideip=$clientip;
5255: if ($clientip eq '127.0.0.1') {
5256: $outsideip=$hostip{$perlvar{'lonHostID'}};
5257: }
5258:
5259: my $clientrec=($hostid{$outsideip} ne undef);
5260: my $ismanager=($managers{$outsideip} ne undef);
1.212 foxr 5261: $clientname = "[unknonwn]";
5262: if($clientrec) { # Establish client type.
5263: $ConnectionType = "client";
1.278 albertel 5264: $clientname = $hostid{$outsideip};
1.212 foxr 5265: if($ismanager) {
5266: $ConnectionType = "both";
5267: }
5268: } else {
5269: $ConnectionType = "manager";
1.278 albertel 5270: $clientname = $managers{$outsideip};
1.212 foxr 5271: }
5272: my $clientok;
1.178 foxr 5273:
1.212 foxr 5274: if ($clientrec || $ismanager) {
5275: &status("Waiting for init from $clientip $clientname");
5276: &logthis('<font color="yellow">INFO: Connection, '.
5277: $clientip.
5278: " ($clientname) connection type = $ConnectionType </font>" );
5279: &status("Connecting $clientip ($clientname))");
5280: my $remotereq=<$client>;
5281: chomp($remotereq);
5282: Debug("Got init: $remotereq");
5283: my $inikeyword = split(/:/, $remotereq);
5284: if ($remotereq =~ /^init/) {
5285: &sethost("sethost:$perlvar{'lonHostID'}");
5286: #
5287: # If the remote is attempting a local init... give that a try:
5288: #
5289: my ($i, $inittype) = split(/:/, $remotereq);
1.209 albertel 5290:
1.212 foxr 5291: # If the connection type is ssl, but I didn't get my
5292: # certificate files yet, then I'll drop back to
5293: # insecure (if allowed).
5294:
5295: if($inittype eq "ssl") {
5296: my ($ca, $cert) = lonssl::CertificateFile;
5297: my $kfile = lonssl::KeyFile;
5298: if((!$ca) ||
5299: (!$cert) ||
5300: (!$kfile)) {
5301: $inittype = ""; # This forces insecure attempt.
5302: &logthis("<font color=\"blue\"> Certificates not "
5303: ."installed -- trying insecure auth</font>");
1.224 foxr 5304: } else { # SSL certificates are in place so
1.212 foxr 5305: } # Leave the inittype alone.
5306: }
5307:
5308: if($inittype eq "local") {
5309: my $key = LocalConnection($client, $remotereq);
5310: if($key) {
5311: Debug("Got local key $key");
5312: $clientok = 1;
5313: my $cipherkey = pack("H32", $key);
5314: $cipher = new IDEA($cipherkey);
5315: print $client "ok:local\n";
5316: &logthis('<font color="green"'
5317: . "Successful local authentication </font>");
5318: $keymode = "local"
1.178 foxr 5319: } else {
1.212 foxr 5320: Debug("Failed to get local key");
5321: $clientok = 0;
5322: shutdown($client, 3);
5323: close $client;
1.178 foxr 5324: }
1.212 foxr 5325: } elsif ($inittype eq "ssl") {
5326: my $key = SSLConnection($client);
5327: if ($key) {
5328: $clientok = 1;
5329: my $cipherkey = pack("H32", $key);
5330: $cipher = new IDEA($cipherkey);
5331: &logthis('<font color="green">'
5332: ."Successfull ssl authentication with $clientname </font>");
5333: $keymode = "ssl";
5334:
1.178 foxr 5335: } else {
1.212 foxr 5336: $clientok = 0;
5337: close $client;
1.178 foxr 5338: }
1.212 foxr 5339:
5340: } else {
5341: my $ok = InsecureConnection($client);
5342: if($ok) {
5343: $clientok = 1;
5344: &logthis('<font color="green">'
5345: ."Successful insecure authentication with $clientname </font>");
5346: print $client "ok\n";
5347: $keymode = "insecure";
1.178 foxr 5348: } else {
1.212 foxr 5349: &logthis('<font color="yellow">'
5350: ."Attempted insecure connection disallowed </font>");
5351: close $client;
5352: $clientok = 0;
1.178 foxr 5353:
5354: }
5355: }
1.212 foxr 5356: } else {
5357: &logthis(
5358: "<font color='blue'>WARNING: "
5359: ."$clientip failed to initialize: >$remotereq< </font>");
5360: &status('No init '.$clientip);
5361: }
5362:
5363: } else {
5364: &logthis(
5365: "<font color='blue'>WARNING: Unknown client $clientip</font>");
5366: &status('Hung up on '.$clientip);
5367: }
5368:
5369: if ($clientok) {
5370: # ---------------- New known client connecting, could mean machine online again
5371:
5372: foreach my $id (keys(%hostip)) {
5373: if ($hostip{$id} ne $clientip ||
5374: $hostip{$currenthostid} eq $clientip) {
5375: # no need to try to do recon's to myself
5376: next;
5377: }
1.307 albertel 5378: &reconlonc("$perlvar{'lonSockDir'}/".$hostname{$id});
1.212 foxr 5379: }
5380: &logthis("<font color='green'>Established connection: $clientname</font>");
5381: &status('Will listen to '.$clientname);
5382: # ------------------------------------------------------------ Process requests
5383: my $keep_going = 1;
5384: my $user_input;
5385: while(($user_input = get_request) && $keep_going) {
5386: alarm(120);
5387: Debug("Main: Got $user_input\n");
5388: $keep_going = &process_request($user_input);
1.178 foxr 5389: alarm(0);
1.212 foxr 5390: &status('Listening to '.$clientname." ($keymode)");
1.161 foxr 5391: }
1.212 foxr 5392:
1.59 www 5393: # --------------------------------------------- client unknown or fishy, refuse
1.212 foxr 5394: } else {
1.161 foxr 5395: print $client "refused\n";
5396: $client->close();
1.190 albertel 5397: &logthis("<font color='blue'>WARNING: "
1.161 foxr 5398: ."Rejected client $clientip, closing connection</font>");
5399: }
1.212 foxr 5400: }
1.161 foxr 5401:
1.1 albertel 5402: # =============================================================================
1.161 foxr 5403:
1.190 albertel 5404: &logthis("<font color='red'>CRITICAL: "
1.161 foxr 5405: ."Disconnect from $clientip ($clientname)</font>");
5406:
5407:
5408: # this exit is VERY important, otherwise the child will become
5409: # a producer of more and more children, forking yourself into
5410: # process death.
5411: exit;
1.106 foxr 5412:
1.78 foxr 5413: }
1.261 foxr 5414: #
5415: # Determine if a user is an author for the indicated domain.
5416: #
5417: # Parameters:
5418: # domain - domain to check in .
5419: # user - Name of user to check.
5420: #
5421: # Return:
5422: # 1 - User is an author for domain.
5423: # 0 - User is not an author for domain.
5424: sub is_author {
5425: my ($domain, $user) = @_;
5426:
5427: &Debug("is_author: $user @ $domain");
5428:
5429: my $hashref = &tie_user_hash($domain, $user, "roles",
5430: &GDBM_READER());
5431:
5432: # Author role should show up as a key /domain/_au
1.78 foxr 5433:
1.321 albertel 5434: my $key = "/$domain/_au";
5435: my $value;
5436: if (defined($hashref)) {
5437: $value = $hashref->{$key};
5438: }
1.78 foxr 5439:
1.261 foxr 5440: if(defined($value)) {
5441: &Debug("$user @ $domain is an author");
5442: }
5443:
5444: return defined($value);
5445: }
1.78 foxr 5446: #
5447: # Checks to see if the input roleput request was to set
5448: # an author role. If so, invokes the lchtmldir script to set
5449: # up a correct public_html
5450: # Parameters:
5451: # request - The request sent to the rolesput subchunk.
5452: # We're looking for /domain/_au
5453: # domain - The domain in which the user is having roles doctored.
5454: # user - Name of the user for which the role is being put.
5455: # authtype - The authentication type associated with the user.
5456: #
1.289 albertel 5457: sub manage_permissions {
1.192 foxr 5458: my ($request, $domain, $user, $authtype) = @_;
1.78 foxr 5459:
1.261 foxr 5460: &Debug("manage_permissions: $request $domain $user $authtype");
5461:
1.78 foxr 5462: # See if the request is of the form /$domain/_au
1.289 albertel 5463: if($request =~ /^(\/\Q$domain\E\/_au)$/) { # It's an author rolesput...
1.78 foxr 5464: my $execdir = $perlvar{'lonDaemons'};
5465: my $userhome= "/home/$user" ;
1.134 albertel 5466: &logthis("system $execdir/lchtmldir $userhome $user $authtype");
1.261 foxr 5467: &Debug("Setting homedir permissions for $userhome");
1.78 foxr 5468: system("$execdir/lchtmldir $userhome $user $authtype");
5469: }
5470: }
1.222 foxr 5471:
5472:
5473: #
5474: # Return the full path of a user password file, whether it exists or not.
5475: # Parameters:
5476: # domain - Domain in which the password file lives.
5477: # user - name of the user.
5478: # Returns:
5479: # Full passwd path:
5480: #
5481: sub password_path {
5482: my ($domain, $user) = @_;
1.264 albertel 5483: return &propath($domain, $user).'/passwd';
1.222 foxr 5484: }
5485:
5486: # Password Filename
5487: # Returns the path to a passwd file given domain and user... only if
5488: # it exists.
5489: # Parameters:
5490: # domain - Domain in which to search.
5491: # user - username.
5492: # Returns:
5493: # - If the password file exists returns its path.
5494: # - If the password file does not exist, returns undefined.
5495: #
5496: sub password_filename {
5497: my ($domain, $user) = @_;
5498:
5499: Debug ("PasswordFilename called: dom = $domain user = $user");
5500:
5501: my $path = &password_path($domain, $user);
5502: Debug("PasswordFilename got path: $path");
5503: if(-e $path) {
5504: return $path;
5505: } else {
5506: return undef;
5507: }
5508: }
5509:
5510: #
5511: # Rewrite the contents of the user's passwd file.
5512: # Parameters:
5513: # domain - domain of the user.
5514: # name - User's name.
5515: # contents - New contents of the file.
5516: # Returns:
5517: # 0 - Failed.
5518: # 1 - Success.
5519: #
5520: sub rewrite_password_file {
5521: my ($domain, $user, $contents) = @_;
5522:
5523: my $file = &password_filename($domain, $user);
5524: if (defined $file) {
5525: my $pf = IO::File->new(">$file");
5526: if($pf) {
5527: print $pf "$contents\n";
5528: return 1;
5529: } else {
5530: return 0;
5531: }
5532: } else {
5533: return 0;
5534: }
5535:
5536: }
5537:
1.78 foxr 5538: #
1.222 foxr 5539: # get_auth_type - Determines the authorization type of a user in a domain.
1.78 foxr 5540:
5541: # Returns the authorization type or nouser if there is no such user.
5542: #
1.222 foxr 5543: sub get_auth_type
1.78 foxr 5544: {
1.192 foxr 5545:
5546: my ($domain, $user) = @_;
1.78 foxr 5547:
1.222 foxr 5548: Debug("get_auth_type( $domain, $user ) \n");
1.78 foxr 5549: my $proname = &propath($domain, $user);
5550: my $passwdfile = "$proname/passwd";
5551: if( -e $passwdfile ) {
5552: my $pf = IO::File->new($passwdfile);
5553: my $realpassword = <$pf>;
5554: chomp($realpassword);
1.79 foxr 5555: Debug("Password info = $realpassword\n");
1.78 foxr 5556: my ($authtype, $contentpwd) = split(/:/, $realpassword);
1.79 foxr 5557: Debug("Authtype = $authtype, content = $contentpwd\n");
1.259 raeburn 5558: return "$authtype:$contentpwd";
1.224 foxr 5559: } else {
1.79 foxr 5560: Debug("Returning nouser");
1.78 foxr 5561: return "nouser";
5562: }
1.1 albertel 5563: }
5564:
1.220 foxr 5565: #
5566: # Validate a user given their domain, name and password. This utility
5567: # function is used by both AuthenticateHandler and ChangePasswordHandler
5568: # to validate the login credentials of a user.
5569: # Parameters:
5570: # $domain - The domain being logged into (this is required due to
5571: # the capability for multihomed systems.
5572: # $user - The name of the user being validated.
5573: # $password - The user's propoposed password.
5574: #
5575: # Returns:
5576: # 1 - The domain,user,pasword triplet corresponds to a valid
5577: # user.
5578: # 0 - The domain,user,password triplet is not a valid user.
5579: #
5580: sub validate_user {
5581: my ($domain, $user, $password) = @_;
5582:
5583:
5584: # Why negative ~pi you may well ask? Well this function is about
5585: # authentication, and therefore very important to get right.
5586: # I've initialized the flag that determines whether or not I've
5587: # validated correctly to a value it's not supposed to get.
5588: # At the end of this function. I'll ensure that it's not still that
5589: # value so we don't just wind up returning some accidental value
5590: # as a result of executing an unforseen code path that
1.249 foxr 5591: # did not set $validated. At the end of valid execution paths,
5592: # validated shoule be 1 for success or 0 for failuer.
1.220 foxr 5593:
5594: my $validated = -3.14159;
5595:
5596: # How we authenticate is determined by the type of authentication
5597: # the user has been assigned. If the authentication type is
5598: # "nouser", the user does not exist so we will return 0.
5599:
1.222 foxr 5600: my $contents = &get_auth_type($domain, $user);
1.220 foxr 5601: my ($howpwd, $contentpwd) = split(/:/, $contents);
5602:
5603: my $null = pack("C",0); # Used by kerberos auth types.
5604:
5605: if ($howpwd ne 'nouser') {
5606:
5607: if($howpwd eq "internal") { # Encrypted is in local password file.
5608: $validated = (crypt($password, $contentpwd) eq $contentpwd);
5609: }
5610: elsif ($howpwd eq "unix") { # User is a normal unix user.
5611: $contentpwd = (getpwnam($user))[1];
5612: if($contentpwd) {
5613: if($contentpwd eq 'x') { # Shadow password file...
5614: my $pwauth_path = "/usr/local/sbin/pwauth";
5615: open PWAUTH, "|$pwauth_path" or
5616: die "Cannot invoke authentication";
5617: print PWAUTH "$user\n$password\n";
5618: close PWAUTH;
5619: $validated = ! $?;
5620:
5621: } else { # Passwords in /etc/passwd.
5622: $validated = (crypt($password,
5623: $contentpwd) eq $contentpwd);
5624: }
5625: } else {
5626: $validated = 0;
5627: }
5628: }
5629: elsif ($howpwd eq "krb4") { # user is in kerberos 4 auth. domain.
5630: if(! ($password =~ /$null/) ) {
5631: my $k4error = &Authen::Krb4::get_pw_in_tkt($user,
5632: "",
5633: $contentpwd,,
5634: 'krbtgt',
5635: $contentpwd,
5636: 1,
5637: $password);
5638: if(!$k4error) {
5639: $validated = 1;
1.224 foxr 5640: } else {
1.220 foxr 5641: $validated = 0;
5642: &logthis('krb4: '.$user.', '.$contentpwd.', '.
5643: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
5644: }
1.224 foxr 5645: } else {
1.220 foxr 5646: $validated = 0; # Password has a match with null.
5647: }
1.224 foxr 5648: } elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain.
1.220 foxr 5649: if(!($password =~ /$null/)) { # Null password not allowed.
5650: my $krbclient = &Authen::Krb5::parse_name($user.'@'
5651: .$contentpwd);
5652: my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd;
5653: my $krbserver = &Authen::Krb5::parse_name($krbservice);
5654: my $credentials= &Authen::Krb5::cc_default();
5655: $credentials->initialize($krbclient);
1.270 matthew 5656: my $krbreturn = &Authen::Krb5::get_in_tkt_with_password($krbclient,
1.220 foxr 5657: $krbserver,
5658: $password,
5659: $credentials);
5660: $validated = ($krbreturn == 1);
1.224 foxr 5661: } else {
1.220 foxr 5662: $validated = 0;
5663: }
1.224 foxr 5664: } elsif ($howpwd eq "localauth") {
1.220 foxr 5665: # Authenticate via installation specific authentcation method:
5666: $validated = &localauth::localauth($user,
5667: $password,
5668: $contentpwd);
1.224 foxr 5669: } else { # Unrecognized auth is also bad.
1.220 foxr 5670: $validated = 0;
5671: }
5672: } else {
5673: $validated = 0;
5674: }
5675: #
5676: # $validated has the correct stat of the authentication:
5677: #
5678:
5679: unless ($validated != -3.14159) {
1.249 foxr 5680: # I >really really< want to know if this happens.
5681: # since it indicates that user authentication is badly
5682: # broken in some code path.
5683: #
5684: die "ValidateUser - failed to set the value of validated $domain, $user $password";
1.220 foxr 5685: }
5686: return $validated;
5687: }
5688:
5689:
1.84 albertel 5690: sub addline {
5691: my ($fname,$hostid,$ip,$newline)=@_;
5692: my $contents;
5693: my $found=0;
5694: my $expr='^'.$hostid.':'.$ip.':';
5695: $expr =~ s/\./\\\./g;
1.134 albertel 5696: my $sh;
1.84 albertel 5697: if ($sh=IO::File->new("$fname.subscription")) {
5698: while (my $subline=<$sh>) {
5699: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
5700: }
5701: $sh->close();
5702: }
5703: $sh=IO::File->new(">$fname.subscription");
5704: if ($contents) { print $sh $contents; }
5705: if ($newline) { print $sh $newline; }
5706: $sh->close();
5707: return $found;
1.86 www 5708: }
5709:
1.234 foxr 5710: sub get_chat {
1.324 raeburn 5711: my ($cdom,$cname,$udom,$uname,$group)=@_;
1.310 albertel 5712:
1.87 www 5713: my @entries=();
1.324 raeburn 5714: my $namespace = 'nohist_chatroom';
5715: my $namespace_inroom = 'nohist_inchatroom';
5716: if (defined($group)) {
5717: $namespace .= '_'.$group;
5718: $namespace_inroom .= '_'.$group;
5719: }
5720: my $hashref = &tie_user_hash($cdom, $cname, $namespace,
1.310 albertel 5721: &GDBM_READER());
5722: if ($hashref) {
5723: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
1.311 albertel 5724: &untie_user_hash($hashref);
1.123 www 5725: }
1.124 www 5726: my @participants=();
1.134 albertel 5727: my $cutoff=time-60;
1.324 raeburn 5728: $hashref = &tie_user_hash($cdom, $cname, $namespace_inroom,
1.310 albertel 5729: &GDBM_WRCREAT());
5730: if ($hashref) {
5731: $hashref->{$uname.':'.$udom}=time;
5732: foreach my $user (sort(keys(%$hashref))) {
5733: if ($hashref->{$user}>$cutoff) {
5734: push(@participants, 'active_participant:'.$user);
1.123 www 5735: }
5736: }
1.311 albertel 5737: &untie_user_hash($hashref);
1.86 www 5738: }
1.124 www 5739: return (@participants,@entries);
1.86 www 5740: }
5741:
1.234 foxr 5742: sub chat_add {
1.324 raeburn 5743: my ($cdom,$cname,$newchat,$group)=@_;
1.88 albertel 5744: my @entries=();
1.142 www 5745: my $time=time;
1.324 raeburn 5746: my $namespace = 'nohist_chatroom';
5747: my $logfile = 'chatroom.log';
5748: if (defined($group)) {
5749: $namespace .= '_'.$group;
5750: $logfile = 'chatroom_'.$group.'.log';
5751: }
5752: my $hashref = &tie_user_hash($cdom, $cname, $namespace,
1.310 albertel 5753: &GDBM_WRCREAT());
5754: if ($hashref) {
5755: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
1.88 albertel 5756: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
5757: my ($thentime,$idnum)=split(/\_/,$lastid);
5758: my $newid=$time.'_000000';
5759: if ($thentime==$time) {
5760: $idnum=~s/^0+//;
5761: $idnum++;
5762: $idnum=substr('000000'.$idnum,-6,6);
5763: $newid=$time.'_'.$idnum;
5764: }
1.310 albertel 5765: $hashref->{$newid}=$newchat;
1.88 albertel 5766: my $expired=$time-3600;
1.310 albertel 5767: foreach my $comment (keys(%$hashref)) {
5768: my ($thistime) = ($comment=~/(\d+)\_/);
1.88 albertel 5769: if ($thistime<$expired) {
1.310 albertel 5770: delete $hashref->{$comment};
1.88 albertel 5771: }
5772: }
1.310 albertel 5773: {
5774: my $proname=&propath($cdom,$cname);
1.324 raeburn 5775: if (open(CHATLOG,">>$proname/$logfile")) {
1.310 albertel 5776: print CHATLOG ("$time:".&unescape($newchat)."\n");
5777: }
5778: close(CHATLOG);
1.142 www 5779: }
1.311 albertel 5780: &untie_user_hash($hashref);
1.86 www 5781: }
1.84 albertel 5782: }
5783:
5784: sub unsub {
5785: my ($fname,$clientip)=@_;
5786: my $result;
1.188 foxr 5787: my $unsubs = 0; # Number of successful unsubscribes:
5788:
5789:
5790: # An old way subscriptions were handled was to have a
5791: # subscription marker file:
5792:
5793: Debug("Attempting unlink of $fname.$clientname");
1.161 foxr 5794: if (unlink("$fname.$clientname")) {
1.188 foxr 5795: $unsubs++; # Successful unsub via marker file.
5796: }
5797:
5798: # The more modern way to do it is to have a subscription list
5799: # file:
5800:
1.84 albertel 5801: if (-e "$fname.subscription") {
1.161 foxr 5802: my $found=&addline($fname,$clientname,$clientip,'');
1.188 foxr 5803: if ($found) {
5804: $unsubs++;
5805: }
5806: }
5807:
5808: # If either or both of these mechanisms succeeded in unsubscribing a
5809: # resource we can return ok:
5810:
5811: if($unsubs) {
5812: $result = "ok\n";
1.84 albertel 5813: } else {
1.188 foxr 5814: $result = "not_subscribed\n";
1.84 albertel 5815: }
1.188 foxr 5816:
1.84 albertel 5817: return $result;
5818: }
5819:
1.101 www 5820: sub currentversion {
5821: my $fname=shift;
5822: my $version=-1;
5823: my $ulsdir='';
5824: if ($fname=~/^(.+)\/[^\/]+$/) {
5825: $ulsdir=$1;
5826: }
1.114 albertel 5827: my ($fnamere1,$fnamere2);
5828: # remove version if already specified
1.101 www 5829: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
1.114 albertel 5830: # get the bits that go before and after the version number
5831: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
5832: $fnamere1=$1;
5833: $fnamere2='.'.$2;
5834: }
1.101 www 5835: if (-e $fname) { $version=1; }
5836: if (-e $ulsdir) {
1.134 albertel 5837: if(-d $ulsdir) {
5838: if (opendir(LSDIR,$ulsdir)) {
5839: my $ulsfn;
5840: while ($ulsfn=readdir(LSDIR)) {
1.101 www 5841: # see if this is a regular file (ignore links produced earlier)
1.134 albertel 5842: my $thisfile=$ulsdir.'/'.$ulsfn;
5843: unless (-l $thisfile) {
1.160 www 5844: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
1.134 albertel 5845: if ($1>$version) { $version=$1; }
5846: }
5847: }
5848: }
5849: closedir(LSDIR);
5850: $version++;
5851: }
5852: }
5853: }
5854: return $version;
1.101 www 5855: }
5856:
5857: sub thisversion {
5858: my $fname=shift;
5859: my $version=-1;
5860: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
5861: $version=$1;
5862: }
5863: return $version;
5864: }
5865:
1.84 albertel 5866: sub subscribe {
5867: my ($userinput,$clientip)=@_;
5868: my $result;
1.293 albertel 5869: my ($cmd,$fname)=split(/:/,$userinput,2);
1.84 albertel 5870: my $ownership=&ishome($fname);
5871: if ($ownership eq 'owner') {
1.101 www 5872: # explitly asking for the current version?
5873: unless (-e $fname) {
5874: my $currentversion=¤tversion($fname);
5875: if (&thisversion($fname)==$currentversion) {
5876: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
5877: my $root=$1;
5878: my $extension=$2;
5879: symlink($root.'.'.$extension,
5880: $root.'.'.$currentversion.'.'.$extension);
1.102 www 5881: unless ($extension=~/\.meta$/) {
5882: symlink($root.'.'.$extension.'.meta',
5883: $root.'.'.$currentversion.'.'.$extension.'.meta');
5884: }
1.101 www 5885: }
5886: }
5887: }
1.84 albertel 5888: if (-e $fname) {
5889: if (-d $fname) {
5890: $result="directory\n";
5891: } else {
1.161 foxr 5892: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
1.134 albertel 5893: my $now=time;
1.161 foxr 5894: my $found=&addline($fname,$clientname,$clientip,
5895: "$clientname:$clientip:$now\n");
1.84 albertel 5896: if ($found) { $result="$fname\n"; }
5897: # if they were subscribed to only meta data, delete that
5898: # subscription, when you subscribe to a file you also get
5899: # the metadata
5900: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
5901: $fname=~s/\/home\/httpd\/html\/res/raw/;
5902: $fname="http://$thisserver/".$fname;
5903: $result="$fname\n";
5904: }
5905: } else {
5906: $result="not_found\n";
5907: }
5908: } else {
5909: $result="rejected\n";
5910: }
5911: return $result;
5912: }
1.287 foxr 5913: # Change the passwd of a unix user. The caller must have
5914: # first verified that the user is a loncapa user.
5915: #
5916: # Parameters:
5917: # user - Unix user name to change.
5918: # pass - New password for the user.
5919: # Returns:
5920: # ok - if success
5921: # other - Some meaningfule error message string.
5922: # NOTE:
5923: # invokes a setuid script to change the passwd.
5924: sub change_unix_password {
5925: my ($user, $pass) = @_;
5926:
5927: &Debug("change_unix_password");
5928: my $execdir=$perlvar{'lonDaemons'};
5929: &Debug("Opening lcpasswd pipeline");
5930: my $pf = IO::File->new("|$execdir/lcpasswd > "
5931: ."$perlvar{'lonDaemons'}"
5932: ."/logs/lcpasswd.log");
5933: print $pf "$user\n$pass\n$pass\n";
5934: close $pf;
5935: my $err = $?;
5936: return ($err < @passwderrors) ? $passwderrors[$err] :
5937: "pwchange_falure - unknown error";
5938:
5939:
5940: }
5941:
1.91 albertel 5942:
5943: sub make_passwd_file {
1.98 foxr 5944: my ($uname, $umode,$npass,$passfilename)=@_;
1.91 albertel 5945: my $result="ok\n";
5946: if ($umode eq 'krb4' or $umode eq 'krb5') {
5947: {
5948: my $pf = IO::File->new(">$passfilename");
1.261 foxr 5949: if ($pf) {
5950: print $pf "$umode:$npass\n";
5951: } else {
5952: $result = "pass_file_failed_error";
5953: }
1.91 albertel 5954: }
5955: } elsif ($umode eq 'internal') {
5956: my $salt=time;
5957: $salt=substr($salt,6,2);
5958: my $ncpass=crypt($npass,$salt);
5959: {
5960: &Debug("Creating internal auth");
5961: my $pf = IO::File->new(">$passfilename");
1.261 foxr 5962: if($pf) {
5963: print $pf "internal:$ncpass\n";
5964: } else {
5965: $result = "pass_file_failed_error";
5966: }
1.91 albertel 5967: }
5968: } elsif ($umode eq 'localauth') {
5969: {
5970: my $pf = IO::File->new(">$passfilename");
1.261 foxr 5971: if($pf) {
5972: print $pf "localauth:$npass\n";
5973: } else {
5974: $result = "pass_file_failed_error";
5975: }
1.91 albertel 5976: }
5977: } elsif ($umode eq 'unix') {
5978: {
1.186 foxr 5979: #
5980: # Don't allow the creation of privileged accounts!!! that would
5981: # be real bad!!!
5982: #
5983: my $uid = getpwnam($uname);
5984: if((defined $uid) && ($uid == 0)) {
5985: &logthis(">>>Attempted to create privilged account blocked");
5986: return "no_priv_account_error\n";
5987: }
5988:
1.223 foxr 5989: my $execpath ="$perlvar{'lonDaemons'}/"."lcuseradd";
1.224 foxr 5990:
5991: my $lc_error_file = $execdir."/tmp/lcuseradd".$$.".status";
1.91 albertel 5992: {
5993: &Debug("Executing external: ".$execpath);
1.98 foxr 5994: &Debug("user = ".$uname.", Password =". $npass);
1.132 matthew 5995: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
1.91 albertel 5996: print $se "$uname\n";
5997: print $se "$npass\n";
5998: print $se "$npass\n";
1.223 foxr 5999: print $se "$lc_error_file\n"; # Status -> unique file.
1.97 foxr 6000: }
1.285 foxr 6001: if (-r $lc_error_file) {
6002: &Debug("Opening error file: $lc_error_file");
6003: my $error = IO::File->new("< $lc_error_file");
6004: my $useraddok = <$error>;
6005: $error->close;
6006: unlink($lc_error_file);
6007:
6008: chomp $useraddok;
6009:
6010: if($useraddok > 0) {
6011: my $error_text = &lcuseraddstrerror($useraddok);
6012: &logthis("Failed lcuseradd: $error_text");
6013: $result = "lcuseradd_failed:$error_text\n";
6014: } else {
6015: my $pf = IO::File->new(">$passfilename");
6016: if($pf) {
6017: print $pf "unix:\n";
6018: } else {
6019: $result = "pass_file_failed_error";
6020: }
6021: }
1.224 foxr 6022: } else {
1.285 foxr 6023: &Debug("Could not locate lcuseradd error: $lc_error_file");
6024: $result="bug_lcuseradd_no_output_file";
1.91 albertel 6025: }
6026: }
6027: } elsif ($umode eq 'none') {
6028: {
1.223 foxr 6029: my $pf = IO::File->new("> $passfilename");
1.261 foxr 6030: if($pf) {
6031: print $pf "none:\n";
6032: } else {
6033: $result = "pass_file_failed_error";
6034: }
1.91 albertel 6035: }
6036: } else {
6037: $result="auth_mode_error\n";
6038: }
6039: return $result;
1.121 albertel 6040: }
6041:
1.265 albertel 6042: sub convert_photo {
6043: my ($start,$dest)=@_;
6044: system("convert $start $dest");
6045: }
6046:
1.121 albertel 6047: sub sethost {
6048: my ($remotereq) = @_;
6049: my (undef,$hostid)=split(/:/,$remotereq);
1.322 albertel 6050: # ignore sethost if we are already correct
6051: if ($hostid eq $currenthostid) {
6052: return 'ok';
6053: }
6054:
1.121 albertel 6055: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
6056: if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
1.200 matthew 6057: $currenthostid =$hostid;
1.121 albertel 6058: $currentdomainid=$hostdom{$hostid};
6059: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
6060: } else {
6061: &logthis("Requested host id $hostid not an alias of ".
6062: $perlvar{'lonHostID'}." refusing connection");
6063: return 'unable_to_set';
6064: }
6065: return 'ok';
6066: }
6067:
6068: sub version {
6069: my ($userinput)=@_;
6070: $remoteVERSION=(split(/:/,$userinput))[1];
6071: return "version:$VERSION";
1.127 albertel 6072: }
1.178 foxr 6073:
1.128 albertel 6074: #There is a copy of this in lonnet.pm
1.127 albertel 6075: sub userload {
6076: my $numusers=0;
6077: {
6078: opendir(LONIDS,$perlvar{'lonIDsDir'});
6079: my $filename;
6080: my $curtime=time;
6081: while ($filename=readdir(LONIDS)) {
6082: if ($filename eq '.' || $filename eq '..') {next;}
1.138 albertel 6083: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
1.159 albertel 6084: if ($curtime-$mtime < 1800) { $numusers++; }
1.127 albertel 6085: }
6086: closedir(LONIDS);
6087: }
6088: my $userloadpercent=0;
6089: my $maxuserload=$perlvar{'lonUserLoadLim'};
6090: if ($maxuserload) {
1.129 albertel 6091: $userloadpercent=100*$numusers/$maxuserload;
1.127 albertel 6092: }
1.130 albertel 6093: $userloadpercent=sprintf("%.2f",$userloadpercent);
1.127 albertel 6094: return $userloadpercent;
1.91 albertel 6095: }
6096:
1.205 raeburn 6097: # Routines for serializing arrays and hashes (copies from lonnet)
6098:
6099: sub array2str {
6100: my (@array) = @_;
6101: my $result=&arrayref2str(\@array);
6102: $result=~s/^__ARRAY_REF__//;
6103: $result=~s/__END_ARRAY_REF__$//;
6104: return $result;
6105: }
6106:
6107: sub arrayref2str {
6108: my ($arrayref) = @_;
6109: my $result='__ARRAY_REF__';
6110: foreach my $elem (@$arrayref) {
6111: if(ref($elem) eq 'ARRAY') {
6112: $result.=&arrayref2str($elem).'&';
6113: } elsif(ref($elem) eq 'HASH') {
6114: $result.=&hashref2str($elem).'&';
6115: } elsif(ref($elem)) {
6116: #print("Got a ref of ".(ref($elem))." skipping.");
6117: } else {
6118: $result.=&escape($elem).'&';
6119: }
6120: }
6121: $result=~s/\&$//;
6122: $result .= '__END_ARRAY_REF__';
6123: return $result;
6124: }
6125:
6126: sub hash2str {
6127: my (%hash) = @_;
6128: my $result=&hashref2str(\%hash);
6129: $result=~s/^__HASH_REF__//;
6130: $result=~s/__END_HASH_REF__$//;
6131: return $result;
6132: }
6133:
6134: sub hashref2str {
6135: my ($hashref)=@_;
6136: my $result='__HASH_REF__';
6137: foreach (sort(keys(%$hashref))) {
6138: if (ref($_) eq 'ARRAY') {
6139: $result.=&arrayref2str($_).'=';
6140: } elsif (ref($_) eq 'HASH') {
6141: $result.=&hashref2str($_).'=';
6142: } elsif (ref($_)) {
6143: $result.='=';
6144: #print("Got a ref of ".(ref($_))." skipping.");
6145: } else {
6146: if ($_) {$result.=&escape($_).'=';} else { last; }
6147: }
6148:
6149: if(ref($hashref->{$_}) eq 'ARRAY') {
6150: $result.=&arrayref2str($hashref->{$_}).'&';
6151: } elsif(ref($hashref->{$_}) eq 'HASH') {
6152: $result.=&hashref2str($hashref->{$_}).'&';
6153: } elsif(ref($hashref->{$_})) {
6154: $result.='&';
6155: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
6156: } else {
6157: $result.=&escape($hashref->{$_}).'&';
6158: }
6159: }
6160: $result=~s/\&$//;
6161: $result .= '__END_HASH_REF__';
6162: return $result;
6163: }
1.200 matthew 6164:
1.61 harris41 6165: # ----------------------------------- POD (plain old documentation, CPAN style)
6166:
6167: =head1 NAME
6168:
6169: lond - "LON Daemon" Server (port "LOND" 5663)
6170:
6171: =head1 SYNOPSIS
6172:
1.74 harris41 6173: Usage: B<lond>
6174:
6175: Should only be run as user=www. This is a command-line script which
6176: is invoked by B<loncron>. There is no expectation that a typical user
6177: will manually start B<lond> from the command-line. (In other words,
6178: DO NOT START B<lond> YOURSELF.)
1.61 harris41 6179:
6180: =head1 DESCRIPTION
6181:
1.74 harris41 6182: There are two characteristics associated with the running of B<lond>,
6183: PROCESS MANAGEMENT (starting, stopping, handling child processes)
6184: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
6185: subscriptions, etc). These are described in two large
6186: sections below.
6187:
6188: B<PROCESS MANAGEMENT>
6189:
1.61 harris41 6190: Preforker - server who forks first. Runs as a daemon. HUPs.
6191: Uses IDEA encryption
6192:
1.74 harris41 6193: B<lond> forks off children processes that correspond to the other servers
6194: in the network. Management of these processes can be done at the
6195: parent process level or the child process level.
6196:
6197: B<logs/lond.log> is the location of log messages.
6198:
6199: The process management is now explained in terms of linux shell commands,
6200: subroutines internal to this code, and signal assignments:
6201:
6202: =over 4
6203:
6204: =item *
6205:
6206: PID is stored in B<logs/lond.pid>
6207:
6208: This is the process id number of the parent B<lond> process.
6209:
6210: =item *
6211:
6212: SIGTERM and SIGINT
6213:
6214: Parent signal assignment:
6215: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
6216:
6217: Child signal assignment:
6218: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
6219: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
6220: to restart a new child.)
6221:
6222: Command-line invocations:
6223: B<kill> B<-s> SIGTERM I<PID>
6224: B<kill> B<-s> SIGINT I<PID>
6225:
6226: Subroutine B<HUNTSMAN>:
6227: This is only invoked for the B<lond> parent I<PID>.
6228: This kills all the children, and then the parent.
6229: The B<lonc.pid> file is cleared.
6230:
6231: =item *
6232:
6233: SIGHUP
6234:
6235: Current bug:
6236: This signal can only be processed the first time
6237: on the parent process. Subsequent SIGHUP signals
6238: have no effect.
6239:
6240: Parent signal assignment:
6241: $SIG{HUP} = \&HUPSMAN;
6242:
6243: Child signal assignment:
6244: none (nothing happens)
6245:
6246: Command-line invocations:
6247: B<kill> B<-s> SIGHUP I<PID>
6248:
6249: Subroutine B<HUPSMAN>:
6250: This is only invoked for the B<lond> parent I<PID>,
6251: This kills all the children, and then the parent.
6252: The B<lond.pid> file is cleared.
6253:
6254: =item *
6255:
6256: SIGUSR1
6257:
6258: Parent signal assignment:
6259: $SIG{USR1} = \&USRMAN;
6260:
6261: Child signal assignment:
6262: $SIG{USR1}= \&logstatus;
6263:
6264: Command-line invocations:
6265: B<kill> B<-s> SIGUSR1 I<PID>
6266:
6267: Subroutine B<USRMAN>:
6268: When invoked for the B<lond> parent I<PID>,
6269: SIGUSR1 is sent to all the children, and the status of
6270: each connection is logged.
1.144 foxr 6271:
6272: =item *
6273:
6274: SIGUSR2
6275:
6276: Parent Signal assignment:
6277: $SIG{USR2} = \&UpdateHosts
6278:
6279: Child signal assignment:
6280: NONE
6281:
1.74 harris41 6282:
6283: =item *
6284:
6285: SIGCHLD
6286:
6287: Parent signal assignment:
6288: $SIG{CHLD} = \&REAPER;
6289:
6290: Child signal assignment:
6291: none
6292:
6293: Command-line invocations:
6294: B<kill> B<-s> SIGCHLD I<PID>
6295:
6296: Subroutine B<REAPER>:
6297: This is only invoked for the B<lond> parent I<PID>.
6298: Information pertaining to the child is removed.
6299: The socket port is cleaned up.
6300:
6301: =back
6302:
6303: B<SERVER-SIDE ACTIVITIES>
6304:
6305: Server-side information can be accepted in an encrypted or non-encrypted
6306: method.
6307:
6308: =over 4
6309:
6310: =item ping
6311:
6312: Query a client in the hosts.tab table; "Are you there?"
6313:
6314: =item pong
6315:
6316: Respond to a ping query.
6317:
6318: =item ekey
6319:
6320: Read in encrypted key, make cipher. Respond with a buildkey.
6321:
6322: =item load
6323:
6324: Respond with CPU load based on a computation upon /proc/loadavg.
6325:
6326: =item currentauth
6327:
6328: Reply with current authentication information (only over an
6329: encrypted channel).
6330:
6331: =item auth
6332:
6333: Only over an encrypted channel, reply as to whether a user's
6334: authentication information can be validated.
6335:
6336: =item passwd
6337:
6338: Allow for a password to be set.
6339:
6340: =item makeuser
6341:
6342: Make a user.
6343:
6344: =item passwd
6345:
6346: Allow for authentication mechanism and password to be changed.
6347:
6348: =item home
1.61 harris41 6349:
1.74 harris41 6350: Respond to a question "are you the home for a given user?"
6351:
6352: =item update
6353:
6354: Update contents of a subscribed resource.
6355:
6356: =item unsubscribe
6357:
6358: The server is unsubscribing from a resource.
6359:
6360: =item subscribe
6361:
6362: The server is subscribing to a resource.
6363:
6364: =item log
6365:
6366: Place in B<logs/lond.log>
6367:
6368: =item put
6369:
6370: stores hash in namespace
6371:
1.230 foxr 6372: =item rolesputy
1.74 harris41 6373:
6374: put a role into a user's environment
6375:
6376: =item get
6377:
6378: returns hash with keys from array
6379: reference filled in from namespace
6380:
6381: =item eget
6382:
6383: returns hash with keys from array
6384: reference filled in from namesp (encrypts the return communication)
6385:
6386: =item rolesget
6387:
6388: get a role from a user's environment
6389:
6390: =item del
6391:
6392: deletes keys out of array from namespace
6393:
6394: =item keys
6395:
6396: returns namespace keys
6397:
6398: =item dump
6399:
6400: dumps the complete (or key matching regexp) namespace into a hash
6401:
6402: =item store
6403:
6404: stores hash permanently
6405: for this url; hashref needs to be given and should be a \%hashname; the
6406: remaining args aren't required and if they aren't passed or are '' they will
6407: be derived from the ENV
6408:
6409: =item restore
6410:
6411: returns a hash for a given url
6412:
6413: =item querysend
6414:
6415: Tells client about the lonsql process that has been launched in response
6416: to a sent query.
6417:
6418: =item queryreply
6419:
6420: Accept information from lonsql and make appropriate storage in temporary
6421: file space.
6422:
6423: =item idput
6424:
6425: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
6426: for each student, defined perhaps by the institutional Registrar.)
6427:
6428: =item idget
6429:
6430: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
6431: for each student, defined perhaps by the institutional Registrar.)
6432:
6433: =item tmpput
6434:
6435: Accept and store information in temporary space.
6436:
6437: =item tmpget
6438:
6439: Send along temporarily stored information.
6440:
6441: =item ls
6442:
6443: List part of a user's directory.
6444:
1.135 foxr 6445: =item pushtable
6446:
6447: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
6448: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
6449: must be restored manually in case of a problem with the new table file.
6450: pushtable requires that the request be encrypted and validated via
6451: ValidateManager. The form of the command is:
6452: enc:pushtable tablename <tablecontents> \n
6453: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
6454: cleartext newline.
6455:
1.74 harris41 6456: =item Hanging up (exit or init)
6457:
6458: What to do when a client tells the server that they (the client)
6459: are leaving the network.
6460:
6461: =item unknown command
6462:
6463: If B<lond> is sent an unknown command (not in the list above),
6464: it replys to the client "unknown_cmd".
1.135 foxr 6465:
1.74 harris41 6466:
6467: =item UNKNOWN CLIENT
6468:
6469: If the anti-spoofing algorithm cannot verify the client,
6470: the client is rejected (with a "refused" message sent
6471: to the client, and the connection is closed.
6472:
6473: =back
1.61 harris41 6474:
6475: =head1 PREREQUISITES
6476:
6477: IO::Socket
6478: IO::File
6479: Apache::File
6480: POSIX
6481: Crypt::IDEA
6482: LWP::UserAgent()
6483: GDBM_File
6484: Authen::Krb4
1.91 albertel 6485: Authen::Krb5
1.61 harris41 6486:
6487: =head1 COREQUISITES
6488:
6489: =head1 OSNAMES
6490:
6491: linux
6492:
6493: =head1 SCRIPT CATEGORIES
6494:
6495: Server/Process
6496:
6497: =cut
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