Annotation of loncom/lond, revision 1.333
1.1 albertel 1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
1.60 www 4: #
1.333 ! raeburn 5: # $Id: lond,v 1.332 2006/05/31 14:47:56 albertel Exp $
1.60 www 6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
1.167 foxr 13: # the Free Software Foundation; either version 2 of the License, or
1.60 www 14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
1.178 foxr 23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
1.60 www 24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
1.161 foxr 27:
28:
1.60 www 29: # http://www.lon-capa.org/
30: #
1.54 harris41 31:
1.134 albertel 32: use strict;
1.80 harris41 33: use lib '/home/httpd/lib/perl/';
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:
1.333 ! raeburn 62: my $VERSION='$Revision: 1.332 $'; #' 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");
1850: } else {
1851: my $transname="$fname.in.transfer";
1852: my $remoteurl=&reply("sub:$fname","$clientname");
1853: my $response;
1854: alarm(120);
1855: {
1856: my $ua=new LWP::UserAgent;
1857: my $request=new HTTP::Request('GET',"$remoteurl");
1858: $response=$ua->request($request,$transname);
1859: }
1860: alarm(0);
1861: if ($response->is_error()) {
1862: unlink($transname);
1863: my $message=$response->status_line;
1864: &logthis("LWP GET: $message for $fname ($remoteurl)");
1865: } else {
1866: if ($remoteurl!~/\.meta$/) {
1867: alarm(120);
1868: {
1869: my $ua=new LWP::UserAgent;
1870: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1871: my $mresponse=$ua->request($mrequest,$fname.'.meta');
1872: if ($mresponse->is_error()) {
1873: unlink($fname.'.meta');
1874: }
1875: }
1876: alarm(0);
1877: }
1878: rename($transname,$fname);
1.308 albertel 1879: &devalidate_meta_cache($fname);
1.225 foxr 1880: }
1881: }
1882: &Reply( $client, "ok\n", $userinput);
1883: } else {
1884: &Failure($client, "not_found\n", $userinput);
1885: }
1886: } else {
1887: &Failure($client, "rejected\n", $userinput);
1888: }
1889: return 1;
1890: }
1891: ®ister_handler("update", \&update_resource_handler, 0 ,1, 0);
1892:
1.308 albertel 1893: sub devalidate_meta_cache {
1894: my ($url) = @_;
1895: use Cache::Memcached;
1896: my $memcache = new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
1897: $url = &declutter($url);
1898: $url =~ s-\.meta$--;
1899: my $id = &escape('meta:'.$url);
1900: $memcache->delete($id);
1901: }
1902:
1903: sub declutter {
1904: my $thisfn=shift;
1905: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
1906: $thisfn=~s/^\///;
1907: $thisfn=~s|^adm/wrapper/||;
1908: $thisfn=~s|^adm/coursedocs/showdoc/||;
1909: $thisfn=~s/^res\///;
1910: $thisfn=~s/\?.+$//;
1911: return $thisfn;
1912: }
1.225 foxr 1913: #
1.226 foxr 1914: # Fetch a user file from a remote server to the user's home directory
1915: # userfiles subdir.
1.225 foxr 1916: # Parameters:
1917: # $cmd - The command that got us here.
1918: # $tail - Tail of the command (remaining parameters).
1919: # $client - File descriptor connected to client.
1920: # Returns
1921: # 0 - Requested to exit, caller should shut down.
1922: # 1 - Continue processing.
1923: #
1924: sub fetch_user_file_handler {
1925:
1926: my ($cmd, $tail, $client) = @_;
1927:
1928: my $userinput = "$cmd:$tail";
1929: my $fname = $tail;
1.232 foxr 1930: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
1.225 foxr 1931: my $udir=&propath($udom,$uname).'/userfiles';
1932: unless (-e $udir) {
1933: mkdir($udir,0770);
1934: }
1.232 foxr 1935: Debug("fetch user file for $fname");
1.225 foxr 1936: if (-e $udir) {
1937: $ufile=~s/^[\.\~]+//;
1.232 foxr 1938:
1939: # IF necessary, create the path right down to the file.
1940: # Note that any regular files in the way of this path are
1941: # wiped out to deal with some earlier folly of mine.
1942:
1.267 raeburn 1943: if (!&mkpath($udir.'/'.$ufile)) {
1.264 albertel 1944: &Failure($client, "unable_to_create\n", $userinput);
1.232 foxr 1945: }
1946:
1.225 foxr 1947: my $destname=$udir.'/'.$ufile;
1948: my $transname=$udir.'/'.$ufile.'.in.transit';
1949: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
1950: my $response;
1.232 foxr 1951: Debug("Remote URL : $remoteurl Transfername $transname Destname: $destname");
1.225 foxr 1952: alarm(120);
1953: {
1954: my $ua=new LWP::UserAgent;
1955: my $request=new HTTP::Request('GET',"$remoteurl");
1956: $response=$ua->request($request,$transname);
1957: }
1958: alarm(0);
1959: if ($response->is_error()) {
1960: unlink($transname);
1961: my $message=$response->status_line;
1962: &logthis("LWP GET: $message for $fname ($remoteurl)");
1963: &Failure($client, "failed\n", $userinput);
1964: } else {
1.232 foxr 1965: Debug("Renaming $transname to $destname");
1.225 foxr 1966: if (!rename($transname,$destname)) {
1967: &logthis("Unable to move $transname to $destname");
1968: unlink($transname);
1969: &Failure($client, "failed\n", $userinput);
1970: } else {
1971: &Reply($client, "ok\n", $userinput);
1972: }
1973: }
1974: } else {
1975: &Failure($client, "not_home\n", $userinput);
1976: }
1977: return 1;
1978: }
1979: ®ister_handler("fetchuserfile", \&fetch_user_file_handler, 0, 1, 0);
1980:
1.226 foxr 1981: #
1982: # Remove a file from a user's home directory userfiles subdirectory.
1983: # Parameters:
1984: # cmd - the Lond request keyword that got us here.
1985: # tail - the part of the command past the keyword.
1986: # client- File descriptor connected with the client.
1987: #
1988: # Returns:
1989: # 1 - Continue processing.
1990: sub remove_user_file_handler {
1991: my ($cmd, $tail, $client) = @_;
1992:
1993: my ($fname) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
1994:
1995: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
1996: if ($ufile =~m|/\.\./|) {
1997: # any files paths with /../ in them refuse
1998: # to deal with
1999: &Failure($client, "refused\n", "$cmd:$tail");
2000: } else {
2001: my $udir = &propath($udom,$uname);
2002: if (-e $udir) {
2003: my $file=$udir.'/userfiles/'.$ufile;
2004: if (-e $file) {
1.253 foxr 2005: #
2006: # If the file is a regular file unlink is fine...
2007: # However it's possible the client wants a dir.
2008: # removed, in which case rmdir is more approprate:
2009: #
1.240 banghart 2010: if (-f $file){
1.241 albertel 2011: unlink($file);
2012: } elsif(-d $file) {
2013: rmdir($file);
1.240 banghart 2014: }
1.226 foxr 2015: if (-e $file) {
1.253 foxr 2016: # File is still there after we deleted it ?!?
2017:
1.226 foxr 2018: &Failure($client, "failed\n", "$cmd:$tail");
2019: } else {
2020: &Reply($client, "ok\n", "$cmd:$tail");
2021: }
2022: } else {
2023: &Failure($client, "not_found\n", "$cmd:$tail");
2024: }
2025: } else {
2026: &Failure($client, "not_home\n", "$cmd:$tail");
2027: }
2028: }
2029: return 1;
2030: }
2031: ®ister_handler("removeuserfile", \&remove_user_file_handler, 0,1,0);
2032:
1.236 albertel 2033: #
2034: # make a directory in a user's home directory userfiles subdirectory.
2035: # Parameters:
2036: # cmd - the Lond request keyword that got us here.
2037: # tail - the part of the command past the keyword.
2038: # client- File descriptor connected with the client.
2039: #
2040: # Returns:
2041: # 1 - Continue processing.
2042: sub mkdir_user_file_handler {
2043: my ($cmd, $tail, $client) = @_;
2044:
2045: my ($dir) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2046: $dir=&unescape($dir);
2047: my ($udom,$uname,$ufile) = ($dir =~ m|^([^/]+)/([^/]+)/(.+)$|);
2048: if ($ufile =~m|/\.\./|) {
2049: # any files paths with /../ in them refuse
2050: # to deal with
2051: &Failure($client, "refused\n", "$cmd:$tail");
2052: } else {
2053: my $udir = &propath($udom,$uname);
2054: if (-e $udir) {
1.264 albertel 2055: my $newdir=$udir.'/userfiles/'.$ufile.'/';
2056: if (!&mkpath($newdir)) {
2057: &Failure($client, "failed\n", "$cmd:$tail");
1.236 albertel 2058: }
1.264 albertel 2059: &Reply($client, "ok\n", "$cmd:$tail");
1.236 albertel 2060: } else {
2061: &Failure($client, "not_home\n", "$cmd:$tail");
2062: }
2063: }
2064: return 1;
2065: }
2066: ®ister_handler("mkdiruserfile", \&mkdir_user_file_handler, 0,1,0);
2067:
1.237 albertel 2068: #
2069: # rename a file in a user's home directory userfiles subdirectory.
2070: # Parameters:
2071: # cmd - the Lond request keyword that got us here.
2072: # tail - the part of the command past the keyword.
2073: # client- File descriptor connected with the client.
2074: #
2075: # Returns:
2076: # 1 - Continue processing.
2077: sub rename_user_file_handler {
2078: my ($cmd, $tail, $client) = @_;
2079:
2080: my ($udom,$uname,$old,$new) = split(/:/, $tail);
2081: $old=&unescape($old);
2082: $new=&unescape($new);
2083: if ($new =~m|/\.\./| || $old =~m|/\.\./|) {
2084: # any files paths with /../ in them refuse to deal with
2085: &Failure($client, "refused\n", "$cmd:$tail");
2086: } else {
2087: my $udir = &propath($udom,$uname);
2088: if (-e $udir) {
2089: my $oldfile=$udir.'/userfiles/'.$old;
2090: my $newfile=$udir.'/userfiles/'.$new;
2091: if (-e $newfile) {
2092: &Failure($client, "exists\n", "$cmd:$tail");
2093: } elsif (! -e $oldfile) {
2094: &Failure($client, "not_found\n", "$cmd:$tail");
2095: } else {
2096: if (!rename($oldfile,$newfile)) {
2097: &Failure($client, "failed\n", "$cmd:$tail");
2098: } else {
2099: &Reply($client, "ok\n", "$cmd:$tail");
2100: }
2101: }
2102: } else {
2103: &Failure($client, "not_home\n", "$cmd:$tail");
2104: }
2105: }
2106: return 1;
2107: }
2108: ®ister_handler("renameuserfile", \&rename_user_file_handler, 0,1,0);
2109:
1.227 foxr 2110: #
1.263 albertel 2111: # Authenticate access to a user file by checking that the token the user's
2112: # passed also exists in their session file
1.227 foxr 2113: #
2114: # Parameters:
2115: # cmd - The request keyword that dispatched to tus.
2116: # tail - The tail of the request (colon separated parameters).
2117: # client - Filehandle open on the client.
2118: # Return:
2119: # 1.
2120: sub token_auth_user_file_handler {
2121: my ($cmd, $tail, $client) = @_;
2122:
2123: my ($fname, $session) = split(/:/, $tail);
2124:
2125: chomp($session);
1.251 foxr 2126: my $reply="non_auth\n";
1.227 foxr 2127: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
2128: $session.'.id')) {
1.332 albertel 2129: flock(ENVIN,LOCK_SH);
1.227 foxr 2130: while (my $line=<ENVIN>) {
1.330 albertel 2131: my ($envname)=split(/=/,$line,2);
2132: $envname=&unescape($envname);
2133: if ($envname=~ m|^userfile\.\Q$fname\E|) { $reply="ok\n"; }
1.227 foxr 2134: }
2135: close(ENVIN);
1.251 foxr 2136: &Reply($client, $reply, "$cmd:$tail");
1.227 foxr 2137: } else {
2138: &Failure($client, "invalid_token\n", "$cmd:$tail");
2139: }
2140: return 1;
2141:
2142: }
2143: ®ister_handler("tokenauthuserfile", \&token_auth_user_file_handler, 0,1,0);
1.229 foxr 2144:
2145: #
2146: # Unsubscribe from a resource.
2147: #
2148: # Parameters:
2149: # $cmd - The command that got us here.
2150: # $tail - Tail of the command (remaining parameters).
2151: # $client - File descriptor connected to client.
2152: # Returns
2153: # 0 - Requested to exit, caller should shut down.
2154: # 1 - Continue processing.
2155: #
2156: sub unsubscribe_handler {
2157: my ($cmd, $tail, $client) = @_;
2158:
2159: my $userinput= "$cmd:$tail";
2160:
2161: my ($fname) = split(/:/,$tail); # Split in case there's extrs.
2162:
2163: &Debug("Unsubscribing $fname");
2164: if (-e $fname) {
2165: &Debug("Exists");
2166: &Reply($client, &unsub($fname,$clientip), $userinput);
2167: } else {
2168: &Failure($client, "not_found\n", $userinput);
2169: }
2170: return 1;
2171: }
2172: ®ister_handler("unsub", \&unsubscribe_handler, 0, 1, 0);
1.263 albertel 2173:
1.230 foxr 2174: # Subscribe to a resource
2175: #
2176: # Parameters:
2177: # $cmd - The command that got us here.
2178: # $tail - Tail of the command (remaining parameters).
2179: # $client - File descriptor connected to client.
2180: # Returns
2181: # 0 - Requested to exit, caller should shut down.
2182: # 1 - Continue processing.
2183: #
2184: sub subscribe_handler {
2185: my ($cmd, $tail, $client)= @_;
2186:
2187: my $userinput = "$cmd:$tail";
2188:
2189: &Reply( $client, &subscribe($userinput,$clientip), $userinput);
2190:
2191: return 1;
2192: }
2193: ®ister_handler("sub", \&subscribe_handler, 0, 1, 0);
2194:
2195: #
2196: # Determine the version of a resource (?) Or is it return
2197: # the top version of the resource? Not yet clear from the
2198: # code in currentversion.
2199: #
2200: # Parameters:
2201: # $cmd - The command that got us here.
2202: # $tail - Tail of the command (remaining parameters).
2203: # $client - File descriptor connected to client.
2204: # Returns
2205: # 0 - Requested to exit, caller should shut down.
2206: # 1 - Continue processing.
2207: #
2208: sub current_version_handler {
2209: my ($cmd, $tail, $client) = @_;
2210:
2211: my $userinput= "$cmd:$tail";
2212:
2213: my $fname = $tail;
2214: &Reply( $client, ¤tversion($fname)."\n", $userinput);
2215: return 1;
2216:
2217: }
2218: ®ister_handler("currentversion", \¤t_version_handler, 0, 1, 0);
2219:
2220: # Make an entry in a user's activity log.
2221: #
2222: # Parameters:
2223: # $cmd - The command that got us here.
2224: # $tail - Tail of the command (remaining parameters).
2225: # $client - File descriptor connected to client.
2226: # Returns
2227: # 0 - Requested to exit, caller should shut down.
2228: # 1 - Continue processing.
2229: #
2230: sub activity_log_handler {
2231: my ($cmd, $tail, $client) = @_;
2232:
2233:
2234: my $userinput= "$cmd:$tail";
2235:
2236: my ($udom,$uname,$what)=split(/:/,$tail);
2237: chomp($what);
2238: my $proname=&propath($udom,$uname);
2239: my $now=time;
2240: my $hfh;
2241: if ($hfh=IO::File->new(">>$proname/activity.log")) {
2242: print $hfh "$now:$clientname:$what\n";
2243: &Reply( $client, "ok\n", $userinput);
2244: } else {
2245: &Failure($client, "error: ".($!+0)." IO::File->new Failed "
2246: ."while attempting log\n",
2247: $userinput);
2248: }
2249:
2250: return 1;
2251: }
1.263 albertel 2252: ®ister_handler("log", \&activity_log_handler, 0, 1, 0);
1.230 foxr 2253:
2254: #
2255: # Put a namespace entry in a user profile hash.
2256: # My druthers would be for this to be an encrypted interaction too.
2257: # anything that might be an inadvertent covert channel about either
2258: # user authentication or user personal information....
2259: #
2260: # Parameters:
2261: # $cmd - The command that got us here.
2262: # $tail - Tail of the command (remaining parameters).
2263: # $client - File descriptor connected to client.
2264: # Returns
2265: # 0 - Requested to exit, caller should shut down.
2266: # 1 - Continue processing.
2267: #
2268: sub put_user_profile_entry {
2269: my ($cmd, $tail, $client) = @_;
1.229 foxr 2270:
1.230 foxr 2271: my $userinput = "$cmd:$tail";
2272:
1.242 raeburn 2273: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
1.230 foxr 2274: if ($namespace ne 'roles') {
2275: chomp($what);
2276: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2277: &GDBM_WRCREAT(),"P",$what);
2278: if($hashref) {
2279: my @pairs=split(/\&/,$what);
2280: foreach my $pair (@pairs) {
2281: my ($key,$value)=split(/=/,$pair);
2282: $hashref->{$key}=$value;
2283: }
1.311 albertel 2284: if (&untie_user_hash($hashref)) {
1.230 foxr 2285: &Reply( $client, "ok\n", $userinput);
2286: } else {
2287: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2288: "while attempting put\n",
2289: $userinput);
2290: }
2291: } else {
1.316 albertel 2292: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
1.230 foxr 2293: "while attempting put\n", $userinput);
2294: }
2295: } else {
2296: &Failure( $client, "refused\n", $userinput);
2297: }
2298:
2299: return 1;
2300: }
2301: ®ister_handler("put", \&put_user_profile_entry, 0, 1, 0);
2302:
1.283 albertel 2303: # Put a piece of new data in hash, returns error if entry already exists
2304: # Parameters:
2305: # $cmd - The command that got us here.
2306: # $tail - Tail of the command (remaining parameters).
2307: # $client - File descriptor connected to client.
2308: # Returns
2309: # 0 - Requested to exit, caller should shut down.
2310: # 1 - Continue processing.
2311: #
2312: sub newput_user_profile_entry {
2313: my ($cmd, $tail, $client) = @_;
2314:
2315: my $userinput = "$cmd:$tail";
2316:
2317: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
2318: if ($namespace eq 'roles') {
2319: &Failure( $client, "refused\n", $userinput);
2320: return 1;
2321: }
2322:
2323: chomp($what);
2324:
2325: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2326: &GDBM_WRCREAT(),"N",$what);
2327: if(!$hashref) {
1.316 albertel 2328: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
1.283 albertel 2329: "while attempting put\n", $userinput);
2330: return 1;
2331: }
2332:
2333: my @pairs=split(/\&/,$what);
2334: foreach my $pair (@pairs) {
2335: my ($key,$value)=split(/=/,$pair);
2336: if (exists($hashref->{$key})) {
2337: &Failure($client, "key_exists: ".$key."\n",$userinput);
2338: return 1;
2339: }
2340: }
2341:
2342: foreach my $pair (@pairs) {
2343: my ($key,$value)=split(/=/,$pair);
2344: $hashref->{$key}=$value;
2345: }
2346:
1.311 albertel 2347: if (&untie_user_hash($hashref)) {
1.283 albertel 2348: &Reply( $client, "ok\n", $userinput);
2349: } else {
2350: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2351: "while attempting put\n",
2352: $userinput);
2353: }
2354: return 1;
2355: }
2356: ®ister_handler("newput", \&newput_user_profile_entry, 0, 1, 0);
2357:
1.230 foxr 2358: #
2359: # Increment a profile entry in the user history file.
2360: # The history contains keyword value pairs. In this case,
2361: # The value itself is a pair of numbers. The first, the current value
2362: # the second an increment that this function applies to the current
2363: # value.
2364: #
2365: # Parameters:
2366: # $cmd - The command that got us here.
2367: # $tail - Tail of the command (remaining parameters).
2368: # $client - File descriptor connected to client.
2369: # Returns
2370: # 0 - Requested to exit, caller should shut down.
2371: # 1 - Continue processing.
2372: #
2373: sub increment_user_value_handler {
2374: my ($cmd, $tail, $client) = @_;
2375:
2376: my $userinput = "$cmd:$tail";
2377:
2378: my ($udom,$uname,$namespace,$what) =split(/:/,$tail);
2379: if ($namespace ne 'roles') {
2380: chomp($what);
2381: my $hashref = &tie_user_hash($udom, $uname,
2382: $namespace, &GDBM_WRCREAT(),
2383: "P",$what);
2384: if ($hashref) {
2385: my @pairs=split(/\&/,$what);
2386: foreach my $pair (@pairs) {
2387: my ($key,$value)=split(/=/,$pair);
1.284 raeburn 2388: $value = &unescape($value);
1.230 foxr 2389: # We could check that we have a number...
2390: if (! defined($value) || $value eq '') {
2391: $value = 1;
2392: }
2393: $hashref->{$key}+=$value;
1.284 raeburn 2394: if ($namespace eq 'nohist_resourcetracker') {
2395: if ($hashref->{$key} < 0) {
2396: $hashref->{$key} = 0;
2397: }
2398: }
1.230 foxr 2399: }
1.311 albertel 2400: if (&untie_user_hash($hashref)) {
1.230 foxr 2401: &Reply( $client, "ok\n", $userinput);
2402: } else {
2403: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2404: "while attempting inc\n", $userinput);
2405: }
2406: } else {
2407: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2408: "while attempting inc\n", $userinput);
2409: }
2410: } else {
2411: &Failure($client, "refused\n", $userinput);
2412: }
2413:
2414: return 1;
2415: }
2416: ®ister_handler("inc", \&increment_user_value_handler, 0, 1, 0);
2417:
2418: #
2419: # Put a new role for a user. Roles are LonCAPA's packaging of permissions.
2420: # Each 'role' a user has implies a set of permissions. Adding a new role
2421: # for a person grants the permissions packaged with that role
2422: # to that user when the role is selected.
2423: #
2424: # Parameters:
2425: # $cmd - The command string (rolesput).
2426: # $tail - The remainder of the request line. For rolesput this
2427: # consists of a colon separated list that contains:
2428: # The domain and user that is granting the role (logged).
2429: # The domain and user that is getting the role.
2430: # The roles being granted as a set of & separated pairs.
2431: # each pair a key value pair.
2432: # $client - File descriptor connected to the client.
2433: # Returns:
2434: # 0 - If the daemon should exit
2435: # 1 - To continue processing.
2436: #
2437: #
2438: sub roles_put_handler {
2439: my ($cmd, $tail, $client) = @_;
2440:
2441: my $userinput = "$cmd:$tail";
2442:
2443: my ( $exedom, $exeuser, $udom, $uname, $what) = split(/:/,$tail);
2444:
2445:
2446: my $namespace='roles';
2447: chomp($what);
2448: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2449: &GDBM_WRCREAT(), "P",
2450: "$exedom:$exeuser:$what");
2451: #
2452: # Log the attempt to set a role. The {}'s here ensure that the file
2453: # handle is open for the minimal amount of time. Since the flush
2454: # is done on close this improves the chances the log will be an un-
2455: # corrupted ordered thing.
2456: if ($hashref) {
1.261 foxr 2457: my $pass_entry = &get_auth_type($udom, $uname);
2458: my ($auth_type,$pwd) = split(/:/, $pass_entry);
2459: $auth_type = $auth_type.":";
1.230 foxr 2460: my @pairs=split(/\&/,$what);
2461: foreach my $pair (@pairs) {
2462: my ($key,$value)=split(/=/,$pair);
2463: &manage_permissions($key, $udom, $uname,
1.260 foxr 2464: $auth_type);
1.230 foxr 2465: $hashref->{$key}=$value;
2466: }
1.311 albertel 2467: if (&untie_user_hash($hashref)) {
1.230 foxr 2468: &Reply($client, "ok\n", $userinput);
2469: } else {
2470: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2471: "while attempting rolesput\n", $userinput);
2472: }
2473: } else {
2474: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2475: "while attempting rolesput\n", $userinput);
2476: }
2477: return 1;
2478: }
2479: ®ister_handler("rolesput", \&roles_put_handler, 1,1,0); # Encoded client only.
2480:
2481: #
1.231 foxr 2482: # Deletes (removes) a role for a user. This is equivalent to removing
2483: # a permissions package associated with the role from the user's profile.
2484: #
2485: # Parameters:
2486: # $cmd - The command (rolesdel)
2487: # $tail - The remainder of the request line. This consists
2488: # of:
2489: # The domain and user requesting the change (logged)
2490: # The domain and user being changed.
2491: # The roles being revoked. These are shipped to us
2492: # as a bunch of & separated role name keywords.
2493: # $client - The file handle open on the client.
2494: # Returns:
2495: # 1 - Continue processing
2496: # 0 - Exit.
2497: #
2498: sub roles_delete_handler {
2499: my ($cmd, $tail, $client) = @_;
2500:
2501: my $userinput = "$cmd:$tail";
2502:
2503: my ($exedom,$exeuser,$udom,$uname,$what)=split(/:/,$tail);
2504: &Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom.
2505: "what = ".$what);
2506: my $namespace='roles';
2507: chomp($what);
2508: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2509: &GDBM_WRCREAT(), "D",
2510: "$exedom:$exeuser:$what");
2511:
2512: if ($hashref) {
2513: my @rolekeys=split(/\&/,$what);
2514:
2515: foreach my $key (@rolekeys) {
2516: delete $hashref->{$key};
2517: }
1.315 albertel 2518: if (&untie_user_hash($hashref)) {
1.231 foxr 2519: &Reply($client, "ok\n", $userinput);
2520: } else {
2521: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2522: "while attempting rolesdel\n", $userinput);
2523: }
2524: } else {
2525: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2526: "while attempting rolesdel\n", $userinput);
2527: }
2528:
2529: return 1;
2530: }
2531: ®ister_handler("rolesdel", \&roles_delete_handler, 1,1, 0); # Encoded client only
2532:
2533: # Unencrypted get from a user's profile database. See
2534: # GetProfileEntryEncrypted for a version that does end-to-end encryption.
2535: # This function retrieves a keyed item from a specific named database in the
2536: # user's directory.
2537: #
2538: # Parameters:
2539: # $cmd - Command request keyword (get).
2540: # $tail - Tail of the command. This is a colon separated list
2541: # consisting of the domain and username that uniquely
2542: # identifies the profile,
2543: # The 'namespace' which selects the gdbm file to
2544: # do the lookup in,
2545: # & separated list of keys to lookup. Note that
2546: # the values are returned as an & separated list too.
2547: # $client - File descriptor open on the client.
2548: # Returns:
2549: # 1 - Continue processing.
2550: # 0 - Exit.
2551: #
2552: sub get_profile_entry {
2553: my ($cmd, $tail, $client) = @_;
2554:
2555: my $userinput= "$cmd:$tail";
2556:
2557: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2558: chomp($what);
1.255 foxr 2559:
2560: my $replystring = read_profile($udom, $uname, $namespace, $what);
2561: my ($first) = split(/:/,$replystring);
2562: if($first ne "error") {
2563: &Reply($client, "$replystring\n", $userinput);
1.231 foxr 2564: } else {
1.255 foxr 2565: &Failure($client, $replystring." while attempting get\n", $userinput);
1.231 foxr 2566: }
2567: return 1;
1.255 foxr 2568:
2569:
1.231 foxr 2570: }
2571: ®ister_handler("get", \&get_profile_entry, 0,1,0);
2572:
2573: #
2574: # Process the encrypted get request. Note that the request is sent
2575: # in clear, but the reply is encrypted. This is a small covert channel:
2576: # information about the sensitive keys is given to the snooper. Just not
2577: # information about the values of the sensitive key. Hmm if I wanted to
2578: # know these I'd snoop for the egets. Get the profile item names from them
2579: # and then issue a get for them since there's no enforcement of the
2580: # requirement of an encrypted get for particular profile items. If I
2581: # were re-doing this, I'd force the request to be encrypted as well as the
2582: # reply. I'd also just enforce encrypted transactions for all gets since
2583: # that would prevent any covert channel snooping.
2584: #
2585: # Parameters:
2586: # $cmd - Command keyword of request (eget).
2587: # $tail - Tail of the command. See GetProfileEntry
# for more information about this.
2588: # $client - File open on the client.
2589: # Returns:
2590: # 1 - Continue processing
2591: # 0 - server should exit.
2592: sub get_profile_entry_encrypted {
2593: my ($cmd, $tail, $client) = @_;
2594:
2595: my $userinput = "$cmd:$tail";
2596:
2597: my ($cmd,$udom,$uname,$namespace,$what) = split(/:/,$userinput);
2598: chomp($what);
1.255 foxr 2599: my $qresult = read_profile($udom, $uname, $namespace, $what);
2600: my ($first) = split(/:/, $qresult);
2601: if($first ne "error") {
2602:
2603: if ($cipher) {
2604: my $cmdlength=length($qresult);
2605: $qresult.=" ";
2606: my $encqresult='';
2607: for(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
2608: $encqresult.= unpack("H16",
2609: $cipher->encrypt(substr($qresult,
2610: $encidx,
2611: 8)));
2612: }
2613: &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput);
2614: } else {
1.231 foxr 2615: &Failure( $client, "error:no_key\n", $userinput);
2616: }
2617: } else {
1.255 foxr 2618: &Failure($client, "$qresult while attempting eget\n", $userinput);
2619:
1.231 foxr 2620: }
2621:
2622: return 1;
2623: }
1.255 foxr 2624: ®ister_handler("eget", \&get_profile_entry_encrypted, 0, 1, 0);
1.263 albertel 2625:
1.231 foxr 2626: #
2627: # Deletes a key in a user profile database.
2628: #
2629: # Parameters:
2630: # $cmd - Command keyword (del).
2631: # $tail - Command tail. IN this case a colon
2632: # separated list containing:
2633: # The domain and user that identifies uniquely
2634: # the identity of the user.
2635: # The profile namespace (name of the profile
2636: # database file).
2637: # & separated list of keywords to delete.
2638: # $client - File open on client socket.
2639: # Returns:
2640: # 1 - Continue processing
2641: # 0 - Exit server.
2642: #
2643: #
2644: sub delete_profile_entry {
2645: my ($cmd, $tail, $client) = @_;
2646:
2647: my $userinput = "cmd:$tail";
2648:
2649: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2650: chomp($what);
2651: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2652: &GDBM_WRCREAT(),
2653: "D",$what);
2654: if ($hashref) {
2655: my @keys=split(/\&/,$what);
2656: foreach my $key (@keys) {
2657: delete($hashref->{$key});
2658: }
1.315 albertel 2659: if (&untie_user_hash($hashref)) {
1.231 foxr 2660: &Reply($client, "ok\n", $userinput);
2661: } else {
2662: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2663: "while attempting del\n", $userinput);
2664: }
2665: } else {
2666: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2667: "while attempting del\n", $userinput);
2668: }
2669: return 1;
2670: }
2671: ®ister_handler("del", \&delete_profile_entry, 0, 1, 0);
1.263 albertel 2672:
1.231 foxr 2673: #
2674: # List the set of keys that are defined in a profile database file.
2675: # A successful reply from this will contain an & separated list of
2676: # the keys.
2677: # Parameters:
2678: # $cmd - Command request (keys).
2679: # $tail - Remainder of the request, a colon separated
2680: # list containing domain/user that identifies the
2681: # user being queried, and the database namespace
2682: # (database filename essentially).
2683: # $client - File open on the client.
2684: # Returns:
2685: # 1 - Continue processing.
2686: # 0 - Exit the server.
2687: #
2688: sub get_profile_keys {
2689: my ($cmd, $tail, $client) = @_;
2690:
2691: my $userinput = "$cmd:$tail";
2692:
2693: my ($udom,$uname,$namespace)=split(/:/,$tail);
2694: my $qresult='';
2695: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2696: &GDBM_READER());
2697: if ($hashref) {
2698: foreach my $key (keys %$hashref) {
2699: $qresult.="$key&";
2700: }
1.315 albertel 2701: if (&untie_user_hash($hashref)) {
1.231 foxr 2702: $qresult=~s/\&$//;
2703: &Reply($client, "$qresult\n", $userinput);
2704: } else {
2705: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2706: "while attempting keys\n", $userinput);
2707: }
2708: } else {
2709: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2710: "while attempting keys\n", $userinput);
2711: }
2712:
2713: return 1;
2714: }
2715: ®ister_handler("keys", \&get_profile_keys, 0, 1, 0);
2716:
2717: #
2718: # Dump the contents of a user profile database.
2719: # Note that this constitutes a very large covert channel too since
2720: # the dump will return sensitive information that is not encrypted.
2721: # The naive security assumption is that the session negotiation ensures
2722: # our client is trusted and I don't believe that's assured at present.
2723: # Sure want badly to go to ssl or tls. Of course if my peer isn't really
2724: # a LonCAPA node they could have negotiated an encryption key too so >sigh<.
2725: #
2726: # Parameters:
2727: # $cmd - The command request keyword (currentdump).
2728: # $tail - Remainder of the request, consisting of a colon
2729: # separated list that has the domain/username and
2730: # the namespace to dump (database file).
2731: # $client - file open on the remote client.
2732: # Returns:
2733: # 1 - Continue processing.
2734: # 0 - Exit the server.
2735: #
2736: sub dump_profile_database {
2737: my ($cmd, $tail, $client) = @_;
2738:
2739: my $userinput = "$cmd:$tail";
2740:
2741: my ($udom,$uname,$namespace) = split(/:/,$tail);
2742: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2743: &GDBM_READER());
2744: if ($hashref) {
2745: # Structure of %data:
2746: # $data{$symb}->{$parameter}=$value;
2747: # $data{$symb}->{'v.'.$parameter}=$version;
2748: # since $parameter will be unescaped, we do not
2749: # have to worry about silly parameter names...
2750:
2751: my $qresult='';
2752: my %data = (); # A hash of anonymous hashes..
2753: while (my ($key,$value) = each(%$hashref)) {
2754: my ($v,$symb,$param) = split(/:/,$key);
2755: next if ($v eq 'version' || $symb eq 'keys');
2756: next if (exists($data{$symb}) &&
2757: exists($data{$symb}->{$param}) &&
2758: $data{$symb}->{'v.'.$param} > $v);
2759: $data{$symb}->{$param}=$value;
2760: $data{$symb}->{'v.'.$param}=$v;
2761: }
1.311 albertel 2762: if (&untie_user_hash($hashref)) {
1.231 foxr 2763: while (my ($symb,$param_hash) = each(%data)) {
2764: while(my ($param,$value) = each (%$param_hash)){
2765: next if ($param =~ /^v\./); # Ignore versions...
2766: #
2767: # Just dump the symb=value pairs separated by &
2768: #
2769: $qresult.=$symb.':'.$param.'='.$value.'&';
2770: }
2771: }
2772: chop($qresult);
2773: &Reply($client , "$qresult\n", $userinput);
2774: } else {
2775: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2776: "while attempting currentdump\n", $userinput);
2777: }
2778: } else {
2779: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2780: "while attempting currentdump\n", $userinput);
2781: }
2782:
2783: return 1;
2784: }
2785: ®ister_handler("currentdump", \&dump_profile_database, 0, 1, 0);
2786:
2787: #
2788: # Dump a profile database with an optional regular expression
2789: # to match against the keys. In this dump, no effort is made
2790: # to separate symb from version information. Presumably the
2791: # databases that are dumped by this command are of a different
2792: # structure. Need to look at this and improve the documentation of
2793: # both this and the currentdump handler.
2794: # Parameters:
2795: # $cmd - The command keyword.
2796: # $tail - All of the characters after the $cmd:
2797: # These are expected to be a colon
2798: # separated list containing:
2799: # domain/user - identifying the user.
2800: # namespace - identifying the database.
2801: # regexp - optional regular expression
2802: # that is matched against
2803: # database keywords to do
2804: # selective dumps.
2805: # $client - Channel open on the client.
2806: # Returns:
2807: # 1 - Continue processing.
2808: # Side effects:
2809: # response is written to $client.
2810: #
2811: sub dump_with_regexp {
2812: my ($cmd, $tail, $client) = @_;
2813:
2814:
2815: my $userinput = "$cmd:$tail";
2816:
1.306 albertel 2817: my ($udom,$uname,$namespace,$regexp,$range)=split(/:/,$tail);
1.231 foxr 2818: if (defined($regexp)) {
2819: $regexp=&unescape($regexp);
2820: } else {
2821: $regexp='.';
2822: }
1.306 albertel 2823: my ($start,$end);
2824: if (defined($range)) {
2825: if ($range =~/^(\d+)\-(\d+)$/) {
2826: ($start,$end) = ($1,$2);
2827: } elsif ($range =~/^(\d+)$/) {
2828: ($start,$end) = (0,$1);
2829: } else {
2830: undef($range);
2831: }
2832: }
1.231 foxr 2833: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2834: &GDBM_READER());
2835: if ($hashref) {
2836: my $qresult='';
1.306 albertel 2837: my $count=0;
1.231 foxr 2838: while (my ($key,$value) = each(%$hashref)) {
2839: if ($regexp eq '.') {
1.306 albertel 2840: $count++;
2841: if (defined($range) && $count >= $end) { last; }
2842: if (defined($range) && $count < $start) { next; }
1.231 foxr 2843: $qresult.=$key.'='.$value.'&';
2844: } else {
2845: my $unescapeKey = &unescape($key);
2846: if (eval('$unescapeKey=~/$regexp/')) {
1.306 albertel 2847: $count++;
2848: if (defined($range) && $count >= $end) { last; }
2849: if (defined($range) && $count < $start) { next; }
1.231 foxr 2850: $qresult.="$key=$value&";
2851: }
2852: }
2853: }
1.311 albertel 2854: if (&untie_user_hash($hashref)) {
1.231 foxr 2855: chop($qresult);
2856: &Reply($client, "$qresult\n", $userinput);
2857: } else {
2858: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2859: "while attempting dump\n", $userinput);
2860: }
2861: } else {
2862: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2863: "while attempting dump\n", $userinput);
2864: }
2865:
2866: return 1;
2867: }
2868: ®ister_handler("dump", \&dump_with_regexp, 0, 1, 0);
2869:
2870: # Store a set of key=value pairs associated with a versioned name.
2871: #
2872: # Parameters:
2873: # $cmd - Request command keyword.
2874: # $tail - Tail of the request. This is a colon
2875: # separated list containing:
2876: # domain/user - User and authentication domain.
2877: # namespace - Name of the database being modified
2878: # rid - Resource keyword to modify.
2879: # what - new value associated with rid.
2880: #
2881: # $client - Socket open on the client.
2882: #
2883: #
2884: # Returns:
2885: # 1 (keep on processing).
2886: # Side-Effects:
2887: # Writes to the client
2888: sub store_handler {
2889: my ($cmd, $tail, $client) = @_;
2890:
2891: my $userinput = "$cmd:$tail";
2892:
2893: my ($udom,$uname,$namespace,$rid,$what) =split(/:/,$tail);
2894: if ($namespace ne 'roles') {
2895:
2896: chomp($what);
2897: my @pairs=split(/\&/,$what);
2898: my $hashref = &tie_user_hash($udom, $uname, $namespace,
1.268 albertel 2899: &GDBM_WRCREAT(), "S",
1.231 foxr 2900: "$rid:$what");
2901: if ($hashref) {
2902: my $now = time;
2903: my @previouskeys=split(/&/,$hashref->{"keys:$rid"});
2904: my $key;
2905: $hashref->{"version:$rid"}++;
2906: my $version=$hashref->{"version:$rid"};
2907: my $allkeys='';
2908: foreach my $pair (@pairs) {
2909: my ($key,$value)=split(/=/,$pair);
2910: $allkeys.=$key.':';
2911: $hashref->{"$version:$rid:$key"}=$value;
2912: }
2913: $hashref->{"$version:$rid:timestamp"}=$now;
2914: $allkeys.='timestamp';
2915: $hashref->{"$version:keys:$rid"}=$allkeys;
1.311 albertel 2916: if (&untie_user_hash($hashref)) {
1.231 foxr 2917: &Reply($client, "ok\n", $userinput);
2918: } else {
2919: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2920: "while attempting store\n", $userinput);
2921: }
2922: } else {
2923: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2924: "while attempting store\n", $userinput);
2925: }
2926: } else {
2927: &Failure($client, "refused\n", $userinput);
2928: }
2929:
2930: return 1;
2931: }
2932: ®ister_handler("store", \&store_handler, 0, 1, 0);
1.263 albertel 2933:
1.323 albertel 2934: # Modify a set of key=value pairs associated with a versioned name.
2935: #
2936: # Parameters:
2937: # $cmd - Request command keyword.
2938: # $tail - Tail of the request. This is a colon
2939: # separated list containing:
2940: # domain/user - User and authentication domain.
2941: # namespace - Name of the database being modified
2942: # rid - Resource keyword to modify.
2943: # v - Version item to modify
2944: # what - new value associated with rid.
2945: #
2946: # $client - Socket open on the client.
2947: #
2948: #
2949: # Returns:
2950: # 1 (keep on processing).
2951: # Side-Effects:
2952: # Writes to the client
2953: sub putstore_handler {
2954: my ($cmd, $tail, $client) = @_;
2955:
2956: my $userinput = "$cmd:$tail";
2957:
2958: my ($udom,$uname,$namespace,$rid,$v,$what) =split(/:/,$tail);
2959: if ($namespace ne 'roles') {
2960:
2961: chomp($what);
2962: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2963: &GDBM_WRCREAT(), "M",
2964: "$rid:$v:$what");
2965: if ($hashref) {
2966: my $now = time;
2967: my %data = &hash_extract($what);
2968: my @allkeys;
2969: while (my($key,$value) = each(%data)) {
2970: push(@allkeys,$key);
2971: $hashref->{"$v:$rid:$key"} = $value;
2972: }
2973: my $allkeys = join(':',@allkeys);
2974: $hashref->{"$v:keys:$rid"}=$allkeys;
2975:
2976: if (&untie_user_hash($hashref)) {
2977: &Reply($client, "ok\n", $userinput);
2978: } else {
2979: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2980: "while attempting store\n", $userinput);
2981: }
2982: } else {
2983: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2984: "while attempting store\n", $userinput);
2985: }
2986: } else {
2987: &Failure($client, "refused\n", $userinput);
2988: }
2989:
2990: return 1;
2991: }
2992: ®ister_handler("putstore", \&putstore_handler, 0, 1, 0);
2993:
2994: sub hash_extract {
2995: my ($str)=@_;
2996: my %hash;
2997: foreach my $pair (split(/\&/,$str)) {
2998: my ($key,$value)=split(/=/,$pair);
2999: $hash{$key}=$value;
3000: }
3001: return (%hash);
3002: }
3003: sub hash_to_str {
3004: my ($hash_ref)=@_;
3005: my $str;
3006: foreach my $key (keys(%$hash_ref)) {
3007: $str.=$key.'='.$hash_ref->{$key}.'&';
3008: }
3009: $str=~s/\&$//;
3010: return $str;
3011: }
3012:
1.231 foxr 3013: #
3014: # Dump out all versions of a resource that has key=value pairs associated
3015: # with it for each version. These resources are built up via the store
3016: # command.
3017: #
3018: # Parameters:
3019: # $cmd - Command keyword.
3020: # $tail - Remainder of the request which consists of:
3021: # domain/user - User and auth. domain.
3022: # namespace - name of resource database.
3023: # rid - Resource id.
3024: # $client - socket open on the client.
3025: #
3026: # Returns:
3027: # 1 indicating the caller should not yet exit.
3028: # Side-effects:
3029: # Writes a reply to the client.
3030: # The reply is a string of the following shape:
3031: # version=current&version:keys=k1:k2...&1:k1=v1&1:k2=v2...
3032: # Where the 1 above represents version 1.
3033: # this continues for all pairs of keys in all versions.
3034: #
3035: #
3036: #
3037: #
3038: sub restore_handler {
3039: my ($cmd, $tail, $client) = @_;
3040:
3041: my $userinput = "$cmd:$tail"; # Only used for logging purposes.
3042:
3043: my ($cmd,$udom,$uname,$namespace,$rid) = split(/:/,$userinput);
3044: $namespace=~s/\//\_/g;
3045: $namespace=~s/\W//g;
3046: chomp($rid);
3047: my $qresult='';
1.309 albertel 3048: my $hashref = &tie_user_hash($udom, $uname, $namespace, &GDBM_READER());
3049: if ($hashref) {
3050: my $version=$hashref->{"version:$rid"};
1.231 foxr 3051: $qresult.="version=$version&";
3052: my $scope;
3053: for ($scope=1;$scope<=$version;$scope++) {
1.309 albertel 3054: my $vkeys=$hashref->{"$scope:keys:$rid"};
1.231 foxr 3055: my @keys=split(/:/,$vkeys);
3056: my $key;
3057: $qresult.="$scope:keys=$vkeys&";
3058: foreach $key (@keys) {
1.309 albertel 3059: $qresult.="$scope:$key=".$hashref->{"$scope:$rid:$key"}."&";
1.231 foxr 3060: }
3061: }
1.311 albertel 3062: if (&untie_user_hash($hashref)) {
1.231 foxr 3063: $qresult=~s/\&$//;
3064: &Reply( $client, "$qresult\n", $userinput);
3065: } else {
3066: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3067: "while attempting restore\n", $userinput);
3068: }
3069: } else {
3070: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3071: "while attempting restore\n", $userinput);
3072: }
3073:
3074: return 1;
3075:
3076:
3077: }
3078: ®ister_handler("restore", \&restore_handler, 0,1,0);
1.234 foxr 3079:
3080: #
1.324 raeburn 3081: # Add a chat message to a synchronous discussion board.
1.234 foxr 3082: #
3083: # Parameters:
3084: # $cmd - Request keyword.
3085: # $tail - Tail of the command. A colon separated list
3086: # containing:
3087: # cdom - Domain on which the chat board lives
1.324 raeburn 3088: # cnum - Course containing the chat board.
3089: # newpost - Body of the posting.
3090: # group - Optional group, if chat board is only
3091: # accessible in a group within the course
1.234 foxr 3092: # $client - Socket open on the client.
3093: # Returns:
3094: # 1 - Indicating caller should keep on processing.
3095: #
3096: # Side-effects:
3097: # writes a reply to the client.
3098: #
3099: #
3100: sub send_chat_handler {
3101: my ($cmd, $tail, $client) = @_;
3102:
3103:
3104: my $userinput = "$cmd:$tail";
3105:
1.324 raeburn 3106: my ($cdom,$cnum,$newpost,$group)=split(/\:/,$tail);
3107: &chat_add($cdom,$cnum,$newpost,$group);
1.234 foxr 3108: &Reply($client, "ok\n", $userinput);
3109:
3110: return 1;
3111: }
3112: ®ister_handler("chatsend", \&send_chat_handler, 0, 1, 0);
1.263 albertel 3113:
1.234 foxr 3114: #
1.324 raeburn 3115: # Retrieve the set of chat messages from a discussion board.
1.234 foxr 3116: #
3117: # Parameters:
3118: # $cmd - Command keyword that initiated the request.
3119: # $tail - Remainder of the request after the command
3120: # keyword. In this case a colon separated list of
3121: # chat domain - Which discussion board.
3122: # chat id - Discussion thread(?)
3123: # domain/user - Authentication domain and username
3124: # of the requesting person.
1.324 raeburn 3125: # group - Optional course group containing
3126: # the board.
1.234 foxr 3127: # $client - Socket open on the client program.
3128: # Returns:
3129: # 1 - continue processing
3130: # Side effects:
3131: # Response is written to the client.
3132: #
3133: sub retrieve_chat_handler {
3134: my ($cmd, $tail, $client) = @_;
3135:
3136:
3137: my $userinput = "$cmd:$tail";
3138:
1.324 raeburn 3139: my ($cdom,$cnum,$udom,$uname,$group)=split(/\:/,$tail);
1.234 foxr 3140: my $reply='';
1.324 raeburn 3141: foreach (&get_chat($cdom,$cnum,$udom,$uname,$group)) {
1.234 foxr 3142: $reply.=&escape($_).':';
3143: }
3144: $reply=~s/\:$//;
3145: &Reply($client, $reply."\n", $userinput);
3146:
3147:
3148: return 1;
3149: }
3150: ®ister_handler("chatretr", \&retrieve_chat_handler, 0, 1, 0);
3151:
3152: #
3153: # Initiate a query of an sql database. SQL query repsonses get put in
3154: # a file for later retrieval. This prevents sql query results from
3155: # bottlenecking the system. Note that with loncnew, perhaps this is
3156: # less of an issue since multiple outstanding requests can be concurrently
3157: # serviced.
3158: #
3159: # Parameters:
3160: # $cmd - COmmand keyword that initiated the request.
3161: # $tail - Remainder of the command after the keyword.
3162: # For this function, this consists of a query and
3163: # 3 arguments that are self-documentingly labelled
3164: # in the original arg1, arg2, arg3.
3165: # $client - Socket open on the client.
3166: # Return:
3167: # 1 - Indicating processing should continue.
3168: # Side-effects:
3169: # a reply is written to $client.
3170: #
3171: sub send_query_handler {
3172: my ($cmd, $tail, $client) = @_;
3173:
3174:
3175: my $userinput = "$cmd:$tail";
3176:
3177: my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail);
3178: $query=~s/\n*$//g;
3179: &Reply($client, "". &sql_reply("$clientname\&$query".
3180: "\&$arg1"."\&$arg2"."\&$arg3")."\n",
3181: $userinput);
3182:
3183: return 1;
3184: }
3185: ®ister_handler("querysend", \&send_query_handler, 0, 1, 0);
3186:
3187: #
3188: # Add a reply to an sql query. SQL queries are done asyncrhonously.
3189: # The query is submitted via a "querysend" transaction.
3190: # There it is passed on to the lonsql daemon, queued and issued to
3191: # mysql.
3192: # This transaction is invoked when the sql transaction is complete
3193: # it stores the query results in flie and indicates query completion.
3194: # presumably local software then fetches this response... I'm guessing
3195: # the sequence is: lonc does a querysend, we ask lonsql to do it.
3196: # lonsql on completion of the query interacts with the lond of our
3197: # client to do a query reply storing two files:
3198: # - id - The results of the query.
3199: # - id.end - Indicating the transaction completed.
3200: # NOTE: id is a unique id assigned to the query and querysend time.
3201: # Parameters:
3202: # $cmd - Command keyword that initiated this request.
3203: # $tail - Remainder of the tail. In this case that's a colon
3204: # separated list containing the query Id and the
3205: # results of the query.
3206: # $client - Socket open on the client.
3207: # Return:
3208: # 1 - Indicating that we should continue processing.
3209: # Side effects:
3210: # ok written to the client.
3211: #
3212: sub reply_query_handler {
3213: my ($cmd, $tail, $client) = @_;
3214:
3215:
3216: my $userinput = "$cmd:$tail";
3217:
3218: my ($cmd,$id,$reply)=split(/:/,$userinput);
3219: my $store;
3220: my $execdir=$perlvar{'lonDaemons'};
3221: if ($store=IO::File->new(">$execdir/tmp/$id")) {
3222: $reply=~s/\&/\n/g;
3223: print $store $reply;
3224: close $store;
3225: my $store2=IO::File->new(">$execdir/tmp/$id.end");
3226: print $store2 "done\n";
3227: close $store2;
3228: &Reply($client, "ok\n", $userinput);
3229: } else {
3230: &Failure($client, "error: ".($!+0)
3231: ." IO::File->new Failed ".
3232: "while attempting queryreply\n", $userinput);
3233: }
3234:
3235:
3236: return 1;
3237: }
3238: ®ister_handler("queryreply", \&reply_query_handler, 0, 1, 0);
3239:
3240: #
3241: # Process the courseidput request. Not quite sure what this means
3242: # at the system level sense. It appears a gdbm file in the
3243: # /home/httpd/lonUsers/$domain/nohist_courseids is tied and
3244: # a set of entries made in that database.
3245: #
3246: # Parameters:
3247: # $cmd - The command keyword that initiated this request.
3248: # $tail - Tail of the command. In this case consists of a colon
3249: # separated list contaning the domain to apply this to and
3250: # an ampersand separated list of keyword=value pairs.
1.272 raeburn 3251: # Each value is a colon separated list that includes:
3252: # description, institutional code and course owner.
3253: # For backward compatibility with versions included
3254: # in LON-CAPA 1.1.X (and earlier) and 1.2.X, institutional
3255: # code and/or course owner are preserved from the existing
3256: # record when writing a new record in response to 1.1 or
3257: # 1.2 implementations of lonnet::flushcourselogs().
3258: #
1.234 foxr 3259: # $client - Socket open on the client.
3260: # Returns:
3261: # 1 - indicating that processing should continue
3262: #
3263: # Side effects:
3264: # reply is written to the client.
3265: #
3266: sub put_course_id_handler {
3267: my ($cmd, $tail, $client) = @_;
3268:
3269:
3270: my $userinput = "$cmd:$tail";
3271:
1.266 raeburn 3272: my ($udom, $what) = split(/:/, $tail,2);
1.234 foxr 3273: chomp($what);
3274: my $now=time;
3275: my @pairs=split(/\&/,$what);
3276:
3277: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3278: if ($hashref) {
3279: foreach my $pair (@pairs) {
1.271 raeburn 3280: my ($key,$courseinfo) = split(/=/,$pair,2);
3281: $courseinfo =~ s/=/:/g;
1.272 raeburn 3282:
1.273 albertel 3283: my @current_items = split(/:/,$hashref->{$key});
3284: shift(@current_items); # remove description
3285: pop(@current_items); # remove last access
1.272 raeburn 3286: my $numcurrent = scalar(@current_items);
3287:
1.273 albertel 3288: my @new_items = split(/:/,$courseinfo);
1.272 raeburn 3289: my $numnew = scalar(@new_items);
3290: if ($numcurrent > 0) {
1.333 ! raeburn 3291: if ($numnew <= $numcurrent) { # flushcourselogs() from pre 2.2
! 3292: for (my $j=$numcurrent-$numnew; $j>=0; $j--) {
! 3293: $courseinfo .= ':'.$current_items[$numcurrent-$j-1];
! 3294: }
1.272 raeburn 3295: }
3296: }
1.266 raeburn 3297: $hashref->{$key}=$courseinfo.':'.$now;
1.234 foxr 3298: }
1.311 albertel 3299: if (&untie_domain_hash($hashref)) {
1.253 foxr 3300: &Reply( $client, "ok\n", $userinput);
1.234 foxr 3301: } else {
1.253 foxr 3302: &Failure($client, "error: ".($!+0)
1.234 foxr 3303: ." untie(GDBM) Failed ".
3304: "while attempting courseidput\n", $userinput);
3305: }
3306: } else {
1.253 foxr 3307: &Failure($client, "error: ".($!+0)
1.234 foxr 3308: ." tie(GDBM) Failed ".
3309: "while attempting courseidput\n", $userinput);
3310: }
1.253 foxr 3311:
1.234 foxr 3312:
3313: return 1;
3314: }
3315: ®ister_handler("courseidput", \&put_course_id_handler, 0, 1, 0);
3316:
3317: # Retrieves the value of a course id resource keyword pattern
3318: # defined since a starting date. Both the starting date and the
3319: # keyword pattern are optional. If the starting date is not supplied it
3320: # is treated as the beginning of time. If the pattern is not found,
3321: # it is treatred as "." matching everything.
3322: #
3323: # Parameters:
3324: # $cmd - Command keyword that resulted in us being dispatched.
3325: # $tail - The remainder of the command that, in this case, consists
3326: # of a colon separated list of:
3327: # domain - The domain in which the course database is
3328: # defined.
3329: # since - Optional parameter describing the minimum
3330: # time of definition(?) of the resources that
3331: # will match the dump.
3332: # description - regular expression that is used to filter
3333: # the dump. Only keywords matching this regexp
3334: # will be used.
1.272 raeburn 3335: # institutional code - optional supplied code to filter
3336: # the dump. Only courses with an institutional code
3337: # that match the supplied code will be returned.
3338: # owner - optional supplied username of owner to filter
3339: # the dump. Only courses for which the course
3340: # owner matches the supplied username will be
1.274 albertel 3341: # returned. Implicit assumption that owner
3342: # is a user in the domain in which the
3343: # course database is defined.
1.234 foxr 3344: # $client - The socket open on the client.
3345: # Returns:
3346: # 1 - Continue processing.
3347: # Side Effects:
3348: # a reply is written to $client.
3349: sub dump_course_id_handler {
3350: my ($cmd, $tail, $client) = @_;
3351:
3352: my $userinput = "$cmd:$tail";
3353:
1.333 ! raeburn 3354: my ($udom,$since,$description,$instcodefilter,$ownerfilter,$coursefilter,
! 3355: $typefilter) =split(/:/,$tail);
1.234 foxr 3356: if (defined($description)) {
3357: $description=&unescape($description);
3358: } else {
3359: $description='.';
3360: }
1.266 raeburn 3361: if (defined($instcodefilter)) {
3362: $instcodefilter=&unescape($instcodefilter);
3363: } else {
3364: $instcodefilter='.';
3365: }
3366: if (defined($ownerfilter)) {
3367: $ownerfilter=&unescape($ownerfilter);
3368: } else {
3369: $ownerfilter='.';
3370: }
1.282 raeburn 3371: if (defined($coursefilter)) {
3372: $coursefilter=&unescape($coursefilter);
3373: } else {
3374: $coursefilter='.';
3375: }
1.333 ! raeburn 3376: if (defined($typefilter)) {
! 3377: $typefilter=&unescape($typefilter);
! 3378: } else {
! 3379: $typefilter='.';
! 3380: }
1.266 raeburn 3381:
1.234 foxr 3382: unless (defined($since)) { $since=0; }
3383: my $qresult='';
3384: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3385: if ($hashref) {
3386: while (my ($key,$value) = each(%$hashref)) {
1.333 ! raeburn 3387: my ($descr,$lasttime,$inst_code,$owner,$type);
1.274 albertel 3388: my @courseitems = split(/:/,$value);
3389: $lasttime = pop(@courseitems);
1.333 ! raeburn 3390: ($descr,$inst_code,$owner,$type)=@courseitems;
1.234 foxr 3391: if ($lasttime<$since) { next; }
1.266 raeburn 3392: my $match = 1;
3393: unless ($description eq '.') {
3394: my $unescapeDescr = &unescape($descr);
3395: unless (eval('$unescapeDescr=~/\Q$description\E/i')) {
3396: $match = 0;
1.234 foxr 3397: }
1.266 raeburn 3398: }
3399: unless ($instcodefilter eq '.' || !defined($instcodefilter)) {
3400: my $unescapeInstcode = &unescape($inst_code);
3401: unless (eval('$unescapeInstcode=~/\Q$instcodefilter\E/i')) {
3402: $match = 0;
3403: }
1.234 foxr 3404: }
1.266 raeburn 3405: unless ($ownerfilter eq '.' || !defined($ownerfilter)) {
3406: my $unescapeOwner = &unescape($owner);
3407: unless (eval('$unescapeOwner=~/\Q$ownerfilter\E/i')) {
3408: $match = 0;
3409: }
3410: }
1.282 raeburn 3411: unless ($coursefilter eq '.' || !defined($coursefilter)) {
3412: my $unescapeCourse = &unescape($key);
3413: unless (eval('$unescapeCourse=~/^$udom(_)\Q$coursefilter\E$/')) {
3414: $match = 0;
3415: }
3416: }
1.333 ! raeburn 3417: unless ($typefilter eq '.' || !defined($typefilter)) {
! 3418: my $unescapeType = &unescape($type);
! 3419: if (!defined($type)) {
! 3420: if ($typefilter ne 'Course') {
! 3421: $match = 0;
! 3422: }
! 3423: } else {
! 3424: unless (eval('$unescapeType=~/^\Q$typefilter\E$/')) {
! 3425: $match = 0;
! 3426: }
! 3427: }
! 3428: }
1.266 raeburn 3429: if ($match == 1) {
3430: $qresult.=$key.'='.$descr.':'.$inst_code.':'.$owner.'&';
3431: }
1.234 foxr 3432: }
1.311 albertel 3433: if (&untie_domain_hash($hashref)) {
1.234 foxr 3434: chop($qresult);
3435: &Reply($client, "$qresult\n", $userinput);
3436: } else {
3437: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3438: "while attempting courseiddump\n", $userinput);
3439: }
3440: } else {
3441: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3442: "while attempting courseiddump\n", $userinput);
3443: }
3444:
3445:
3446: return 1;
3447: }
3448: ®ister_handler("courseiddump", \&dump_course_id_handler, 0, 1, 0);
1.238 foxr 3449:
3450: #
3451: # Puts an id to a domains id database.
3452: #
3453: # Parameters:
3454: # $cmd - The command that triggered us.
3455: # $tail - Remainder of the request other than the command. This is a
3456: # colon separated list containing:
3457: # $domain - The domain for which we are writing the id.
3458: # $pairs - The id info to write... this is and & separated list
3459: # of keyword=value.
3460: # $client - Socket open on the client.
3461: # Returns:
3462: # 1 - Continue processing.
3463: # Side effects:
3464: # reply is written to $client.
3465: #
3466: sub put_id_handler {
3467: my ($cmd,$tail,$client) = @_;
3468:
3469:
3470: my $userinput = "$cmd:$tail";
3471:
3472: my ($udom,$what)=split(/:/,$tail);
3473: chomp($what);
3474: my @pairs=split(/\&/,$what);
3475: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
3476: "P", $what);
3477: if ($hashref) {
3478: foreach my $pair (@pairs) {
3479: my ($key,$value)=split(/=/,$pair);
3480: $hashref->{$key}=$value;
3481: }
1.311 albertel 3482: if (&untie_domain_hash($hashref)) {
1.238 foxr 3483: &Reply($client, "ok\n", $userinput);
3484: } else {
3485: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3486: "while attempting idput\n", $userinput);
3487: }
3488: } else {
3489: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3490: "while attempting idput\n", $userinput);
3491: }
3492:
3493: return 1;
3494: }
1.263 albertel 3495: ®ister_handler("idput", \&put_id_handler, 0, 1, 0);
1.238 foxr 3496:
3497: #
3498: # Retrieves a set of id values from the id database.
3499: # Returns an & separated list of results, one for each requested id to the
3500: # client.
3501: #
3502: # Parameters:
3503: # $cmd - Command keyword that caused us to be dispatched.
3504: # $tail - Tail of the command. Consists of a colon separated:
3505: # domain - the domain whose id table we dump
3506: # ids Consists of an & separated list of
3507: # id keywords whose values will be fetched.
3508: # nonexisting keywords will have an empty value.
3509: # $client - Socket open on the client.
3510: #
3511: # Returns:
3512: # 1 - indicating processing should continue.
3513: # Side effects:
3514: # An & separated list of results is written to $client.
3515: #
3516: sub get_id_handler {
3517: my ($cmd, $tail, $client) = @_;
3518:
3519:
3520: my $userinput = "$client:$tail";
3521:
3522: my ($udom,$what)=split(/:/,$tail);
3523: chomp($what);
3524: my @queries=split(/\&/,$what);
3525: my $qresult='';
3526: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_READER());
3527: if ($hashref) {
3528: for (my $i=0;$i<=$#queries;$i++) {
3529: $qresult.="$hashref->{$queries[$i]}&";
3530: }
1.311 albertel 3531: if (&untie_domain_hash($hashref)) {
1.238 foxr 3532: $qresult=~s/\&$//;
3533: &Reply($client, "$qresult\n", $userinput);
3534: } else {
3535: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3536: "while attempting idget\n",$userinput);
3537: }
3538: } else {
3539: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3540: "while attempting idget\n",$userinput);
3541: }
3542:
3543: return 1;
3544: }
1.263 albertel 3545: ®ister_handler("idget", \&get_id_handler, 0, 1, 0);
1.238 foxr 3546:
3547: #
1.299 raeburn 3548: # Puts broadcast e-mail sent by Domain Coordinator in nohist_dcmail database
3549: #
3550: # Parameters
3551: # $cmd - Command keyword that caused us to be dispatched.
3552: # $tail - Tail of the command. Consists of a colon separated:
3553: # domain - the domain whose dcmail we are recording
3554: # email Consists of key=value pair
3555: # where key is unique msgid
3556: # and value is message (in XML)
3557: # $client - Socket open on the client.
3558: #
3559: # Returns:
3560: # 1 - indicating processing should continue.
3561: # Side effects
3562: # reply is written to $client.
3563: #
3564: sub put_dcmail_handler {
3565: my ($cmd,$tail,$client) = @_;
3566: my $userinput = "$cmd:$tail";
3567:
3568: my ($udom,$what)=split(/:/,$tail);
3569: chomp($what);
3570: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
3571: if ($hashref) {
3572: my ($key,$value)=split(/=/,$what);
3573: $hashref->{$key}=$value;
3574: }
1.311 albertel 3575: if (&untie_domain_hash($hashref)) {
1.299 raeburn 3576: &Reply($client, "ok\n", $userinput);
3577: } else {
3578: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3579: "while attempting dcmailput\n", $userinput);
3580: }
3581: return 1;
3582: }
3583: ®ister_handler("dcmailput", \&put_dcmail_handler, 0, 1, 0);
3584:
3585: #
3586: # Retrieves broadcast e-mail from nohist_dcmail database
3587: # Returns to client an & separated list of key=value pairs,
3588: # where key is msgid and value is message information.
3589: #
3590: # Parameters
3591: # $cmd - Command keyword that caused us to be dispatched.
3592: # $tail - Tail of the command. Consists of a colon separated:
3593: # domain - the domain whose dcmail table we dump
3594: # startfilter - beginning of time window
3595: # endfilter - end of time window
3596: # sendersfilter - & separated list of username:domain
3597: # for senders to search for.
3598: # $client - Socket open on the client.
3599: #
3600: # Returns:
3601: # 1 - indicating processing should continue.
3602: # Side effects
3603: # reply (& separated list of msgid=messageinfo pairs) is
3604: # written to $client.
3605: #
3606: sub dump_dcmail_handler {
3607: my ($cmd, $tail, $client) = @_;
3608:
3609: my $userinput = "$cmd:$tail";
3610: my ($udom,$startfilter,$endfilter,$sendersfilter) = split(/:/,$tail);
3611: chomp($sendersfilter);
3612: my @senders = ();
3613: if (defined($startfilter)) {
3614: $startfilter=&unescape($startfilter);
3615: } else {
3616: $startfilter='.';
3617: }
3618: if (defined($endfilter)) {
3619: $endfilter=&unescape($endfilter);
3620: } else {
3621: $endfilter='.';
3622: }
3623: if (defined($sendersfilter)) {
3624: $sendersfilter=&unescape($sendersfilter);
1.300 albertel 3625: @senders = map { &unescape($_) } split(/\&/,$sendersfilter);
1.299 raeburn 3626: }
3627:
3628: my $qresult='';
3629: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
3630: if ($hashref) {
3631: while (my ($key,$value) = each(%$hashref)) {
3632: my $match = 1;
1.303 albertel 3633: my ($timestamp,$subj,$uname,$udom) =
3634: split(/:/,&unescape(&unescape($key)),5); # yes, twice really
1.299 raeburn 3635: $subj = &unescape($subj);
3636: unless ($startfilter eq '.' || !defined($startfilter)) {
3637: if ($timestamp < $startfilter) {
3638: $match = 0;
3639: }
3640: }
3641: unless ($endfilter eq '.' || !defined($endfilter)) {
3642: if ($timestamp > $endfilter) {
3643: $match = 0;
3644: }
3645: }
3646: unless (@senders < 1) {
3647: unless (grep/^$uname:$udom$/,@senders) {
3648: $match = 0;
3649: }
3650: }
3651: if ($match == 1) {
3652: $qresult.=$key.'='.$value.'&';
3653: }
3654: }
1.311 albertel 3655: if (&untie_domain_hash($hashref)) {
1.299 raeburn 3656: chop($qresult);
3657: &Reply($client, "$qresult\n", $userinput);
3658: } else {
3659: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3660: "while attempting dcmaildump\n", $userinput);
3661: }
3662: } else {
3663: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3664: "while attempting dcmaildump\n", $userinput);
3665: }
3666: return 1;
3667: }
3668:
3669: ®ister_handler("dcmaildump", \&dump_dcmail_handler, 0, 1, 0);
3670:
3671: #
3672: # Puts domain roles in nohist_domainroles database
3673: #
3674: # Parameters
3675: # $cmd - Command keyword that caused us to be dispatched.
3676: # $tail - Tail of the command. Consists of a colon separated:
3677: # domain - the domain whose roles we are recording
3678: # role - Consists of key=value pair
3679: # where key is unique role
3680: # and value is start/end date information
3681: # $client - Socket open on the client.
3682: #
3683: # Returns:
3684: # 1 - indicating processing should continue.
3685: # Side effects
3686: # reply is written to $client.
3687: #
3688:
3689: sub put_domainroles_handler {
3690: my ($cmd,$tail,$client) = @_;
3691:
3692: my $userinput = "$cmd:$tail";
3693: my ($udom,$what)=split(/:/,$tail);
3694: chomp($what);
3695: my @pairs=split(/\&/,$what);
3696: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
3697: if ($hashref) {
3698: foreach my $pair (@pairs) {
3699: my ($key,$value)=split(/=/,$pair);
3700: $hashref->{$key}=$value;
3701: }
1.311 albertel 3702: if (&untie_domain_hash($hashref)) {
1.299 raeburn 3703: &Reply($client, "ok\n", $userinput);
3704: } else {
3705: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3706: "while attempting domroleput\n", $userinput);
3707: }
3708: } else {
3709: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3710: "while attempting domroleput\n", $userinput);
3711: }
3712:
3713: return 1;
3714: }
3715:
3716: ®ister_handler("domroleput", \&put_domainroles_handler, 0, 1, 0);
3717:
3718: #
3719: # Retrieves domain roles from nohist_domainroles database
3720: # Returns to client an & separated list of key=value pairs,
3721: # where key is role and value is start and end date information.
3722: #
3723: # Parameters
3724: # $cmd - Command keyword that caused us to be dispatched.
3725: # $tail - Tail of the command. Consists of a colon separated:
3726: # domain - the domain whose domain roles table we dump
3727: # $client - Socket open on the client.
3728: #
3729: # Returns:
3730: # 1 - indicating processing should continue.
3731: # Side effects
3732: # reply (& separated list of role=start/end info pairs) is
3733: # written to $client.
3734: #
3735: sub dump_domainroles_handler {
3736: my ($cmd, $tail, $client) = @_;
3737:
3738: my $userinput = "$cmd:$tail";
3739: my ($udom,$startfilter,$endfilter,$rolesfilter) = split(/:/,$tail);
3740: chomp($rolesfilter);
3741: my @roles = ();
3742: if (defined($startfilter)) {
3743: $startfilter=&unescape($startfilter);
3744: } else {
3745: $startfilter='.';
3746: }
3747: if (defined($endfilter)) {
3748: $endfilter=&unescape($endfilter);
3749: } else {
3750: $endfilter='.';
3751: }
3752: if (defined($rolesfilter)) {
3753: $rolesfilter=&unescape($rolesfilter);
1.300 albertel 3754: @roles = split(/\&/,$rolesfilter);
1.299 raeburn 3755: }
3756:
3757: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
3758: if ($hashref) {
3759: my $qresult = '';
3760: while (my ($key,$value) = each(%$hashref)) {
3761: my $match = 1;
3762: my ($start,$end) = split(/:/,&unescape($value));
3763: my ($trole,$uname,$udom,$runame,$rudom,$rsec) = split(/:/,&unescape($key));
3764: unless ($startfilter eq '.' || !defined($startfilter)) {
3765: if ($start >= $startfilter) {
3766: $match = 0;
3767: }
3768: }
3769: unless ($endfilter eq '.' || !defined($endfilter)) {
3770: if ($end <= $endfilter) {
3771: $match = 0;
3772: }
3773: }
3774: unless (@roles < 1) {
3775: unless (grep/^$trole$/,@roles) {
3776: $match = 0;
3777: }
3778: }
3779: if ($match == 1) {
3780: $qresult.=$key.'='.$value.'&';
3781: }
3782: }
1.311 albertel 3783: if (&untie_domain_hash($hashref)) {
1.299 raeburn 3784: chop($qresult);
3785: &Reply($client, "$qresult\n", $userinput);
3786: } else {
3787: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3788: "while attempting domrolesdump\n", $userinput);
3789: }
3790: } else {
3791: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3792: "while attempting domrolesdump\n", $userinput);
3793: }
3794: return 1;
3795: }
3796:
3797: ®ister_handler("domrolesdump", \&dump_domainroles_handler, 0, 1, 0);
3798:
3799:
1.238 foxr 3800: # Process the tmpput command I'm not sure what this does.. Seems to
3801: # create a file in the lonDaemons/tmp directory of the form $id.tmp
3802: # where Id is the client's ip concatenated with a sequence number.
3803: # The file will contain some value that is passed in. Is this e.g.
3804: # a login token?
3805: #
3806: # Parameters:
3807: # $cmd - The command that got us dispatched.
3808: # $tail - The remainder of the request following $cmd:
3809: # In this case this will be the contents of the file.
3810: # $client - Socket connected to the client.
3811: # Returns:
3812: # 1 indicating processing can continue.
3813: # Side effects:
3814: # A file is created in the local filesystem.
3815: # A reply is sent to the client.
3816: sub tmp_put_handler {
3817: my ($cmd, $what, $client) = @_;
3818:
3819: my $userinput = "$cmd:$what"; # Reconstruct for logging.
3820:
3821:
3822: my $store;
3823: $tmpsnum++;
3824: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
3825: $id=~s/\W/\_/g;
3826: $what=~s/\n//g;
3827: my $execdir=$perlvar{'lonDaemons'};
3828: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
3829: print $store $what;
3830: close $store;
3831: &Reply($client, "$id\n", $userinput);
3832: } else {
3833: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
3834: "while attempting tmpput\n", $userinput);
3835: }
3836: return 1;
3837:
3838: }
3839: ®ister_handler("tmpput", \&tmp_put_handler, 0, 1, 0);
1.263 albertel 3840:
1.238 foxr 3841: # Processes the tmpget command. This command returns the contents
3842: # of a temporary resource file(?) created via tmpput.
3843: #
3844: # Paramters:
3845: # $cmd - Command that got us dispatched.
3846: # $id - Tail of the command, contain the id of the resource
3847: # we want to fetch.
3848: # $client - socket open on the client.
3849: # Return:
3850: # 1 - Inidcating processing can continue.
3851: # Side effects:
3852: # A reply is sent to the client.
3853: #
3854: sub tmp_get_handler {
3855: my ($cmd, $id, $client) = @_;
3856:
3857: my $userinput = "$cmd:$id";
3858:
3859:
3860: $id=~s/\W/\_/g;
3861: my $store;
3862: my $execdir=$perlvar{'lonDaemons'};
3863: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
3864: my $reply=<$store>;
3865: &Reply( $client, "$reply\n", $userinput);
3866: close $store;
3867: } else {
3868: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
3869: "while attempting tmpget\n", $userinput);
3870: }
3871:
3872: return 1;
3873: }
3874: ®ister_handler("tmpget", \&tmp_get_handler, 0, 1, 0);
1.263 albertel 3875:
1.238 foxr 3876: #
3877: # Process the tmpdel command. This command deletes a temp resource
3878: # created by the tmpput command.
3879: #
3880: # Parameters:
3881: # $cmd - Command that got us here.
3882: # $id - Id of the temporary resource created.
3883: # $client - socket open on the client process.
3884: #
3885: # Returns:
3886: # 1 - Indicating processing should continue.
3887: # Side Effects:
3888: # A file is deleted
3889: # A reply is sent to the client.
3890: sub tmp_del_handler {
3891: my ($cmd, $id, $client) = @_;
3892:
3893: my $userinput= "$cmd:$id";
3894:
3895: chomp($id);
3896: $id=~s/\W/\_/g;
3897: my $execdir=$perlvar{'lonDaemons'};
3898: if (unlink("$execdir/tmp/$id.tmp")) {
3899: &Reply($client, "ok\n", $userinput);
3900: } else {
3901: &Failure( $client, "error: ".($!+0)."Unlink tmp Failed ".
3902: "while attempting tmpdel\n", $userinput);
3903: }
3904:
3905: return 1;
3906:
3907: }
3908: ®ister_handler("tmpdel", \&tmp_del_handler, 0, 1, 0);
1.263 albertel 3909:
1.238 foxr 3910: #
1.246 foxr 3911: # Processes the setannounce command. This command
3912: # creates a file named announce.txt in the top directory of
3913: # the documentn root and sets its contents. The announce.txt file is
3914: # printed in its entirety at the LonCAPA login page. Note:
3915: # once the announcement.txt fileis created it cannot be deleted.
3916: # However, setting the contents of the file to empty removes the
3917: # announcement from the login page of loncapa so who cares.
3918: #
3919: # Parameters:
3920: # $cmd - The command that got us dispatched.
3921: # $announcement - The text of the announcement.
3922: # $client - Socket open on the client process.
3923: # Retunrns:
3924: # 1 - Indicating request processing should continue
3925: # Side Effects:
3926: # The file {DocRoot}/announcement.txt is created.
3927: # A reply is sent to $client.
3928: #
3929: sub set_announce_handler {
3930: my ($cmd, $announcement, $client) = @_;
3931:
3932: my $userinput = "$cmd:$announcement";
3933:
3934: chomp($announcement);
3935: $announcement=&unescape($announcement);
3936: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
3937: '/announcement.txt')) {
3938: print $store $announcement;
3939: close $store;
3940: &Reply($client, "ok\n", $userinput);
3941: } else {
3942: &Failure($client, "error: ".($!+0)."\n", $userinput);
3943: }
3944:
3945: return 1;
3946: }
3947: ®ister_handler("setannounce", \&set_announce_handler, 0, 1, 0);
1.263 albertel 3948:
1.246 foxr 3949: #
3950: # Return the version of the daemon. This can be used to determine
3951: # the compatibility of cross version installations or, alternatively to
3952: # simply know who's out of date and who isn't. Note that the version
3953: # is returned concatenated with the tail.
3954: # Parameters:
3955: # $cmd - the request that dispatched to us.
3956: # $tail - Tail of the request (client's version?).
3957: # $client - Socket open on the client.
3958: #Returns:
3959: # 1 - continue processing requests.
3960: # Side Effects:
3961: # Replies with version to $client.
3962: sub get_version_handler {
3963: my ($cmd, $tail, $client) = @_;
3964:
3965: my $userinput = $cmd.$tail;
3966:
3967: &Reply($client, &version($userinput)."\n", $userinput);
3968:
3969:
3970: return 1;
3971: }
3972: ®ister_handler("version", \&get_version_handler, 0, 1, 0);
1.263 albertel 3973:
1.246 foxr 3974: # Set the current host and domain. This is used to support
3975: # multihomed systems. Each IP of the system, or even separate daemons
3976: # on the same IP can be treated as handling a separate lonCAPA virtual
3977: # machine. This command selects the virtual lonCAPA. The client always
3978: # knows the right one since it is lonc and it is selecting the domain/system
3979: # from the hosts.tab file.
3980: # Parameters:
3981: # $cmd - Command that dispatched us.
3982: # $tail - Tail of the command (domain/host requested).
3983: # $socket - Socket open on the client.
3984: #
3985: # Returns:
3986: # 1 - Indicates the program should continue to process requests.
3987: # Side-effects:
3988: # The default domain/system context is modified for this daemon.
3989: # a reply is sent to the client.
3990: #
3991: sub set_virtual_host_handler {
3992: my ($cmd, $tail, $socket) = @_;
3993:
3994: my $userinput ="$cmd:$tail";
3995:
3996: &Reply($client, &sethost($userinput)."\n", $userinput);
3997:
3998:
3999: return 1;
4000: }
1.247 albertel 4001: ®ister_handler("sethost", \&set_virtual_host_handler, 0, 1, 0);
1.246 foxr 4002:
4003: # Process a request to exit:
4004: # - "bye" is sent to the client.
4005: # - The client socket is shutdown and closed.
4006: # - We indicate to the caller that we should exit.
4007: # Formal Parameters:
4008: # $cmd - The command that got us here.
4009: # $tail - Tail of the command (empty).
4010: # $client - Socket open on the tail.
4011: # Returns:
4012: # 0 - Indicating the program should exit!!
4013: #
4014: sub exit_handler {
4015: my ($cmd, $tail, $client) = @_;
4016:
4017: my $userinput = "$cmd:$tail";
4018:
4019: &logthis("Client $clientip ($clientname) hanging up: $userinput");
4020: &Reply($client, "bye\n", $userinput);
4021: $client->shutdown(2); # shutdown the socket forcibly.
4022: $client->close();
4023:
4024: return 0;
4025: }
1.248 foxr 4026: ®ister_handler("exit", \&exit_handler, 0,1,1);
4027: ®ister_handler("init", \&exit_handler, 0,1,1);
4028: ®ister_handler("quit", \&exit_handler, 0,1,1);
4029:
4030: # Determine if auto-enrollment is enabled.
4031: # Note that the original had what I believe to be a defect.
4032: # The original returned 0 if the requestor was not a registerd client.
4033: # It should return "refused".
4034: # Formal Parameters:
4035: # $cmd - The command that invoked us.
4036: # $tail - The tail of the command (Extra command parameters.
4037: # $client - The socket open on the client that issued the request.
4038: # Returns:
4039: # 1 - Indicating processing should continue.
4040: #
4041: sub enrollment_enabled_handler {
4042: my ($cmd, $tail, $client) = @_;
4043: my $userinput = $cmd.":".$tail; # For logging purposes.
4044:
4045:
4046: my $cdom = split(/:/, $tail); # Domain we're asking about.
4047: my $outcome = &localenroll::run($cdom);
4048: &Reply($client, "$outcome\n", $userinput);
4049:
4050: return 1;
4051: }
4052: ®ister_handler("autorun", \&enrollment_enabled_handler, 0, 1, 0);
4053:
4054: # Get the official sections for which auto-enrollment is possible.
4055: # Since the admin people won't know about 'unofficial sections'
4056: # we cannot auto-enroll on them.
4057: # Formal Parameters:
4058: # $cmd - The command request that got us dispatched here.
4059: # $tail - The remainder of the request. In our case this
4060: # will be split into:
4061: # $coursecode - The course name from the admin point of view.
4062: # $cdom - The course's domain(?).
4063: # $client - Socket open on the client.
4064: # Returns:
4065: # 1 - Indiciting processing should continue.
4066: #
4067: sub get_sections_handler {
4068: my ($cmd, $tail, $client) = @_;
4069: my $userinput = "$cmd:$tail";
4070:
4071: my ($coursecode, $cdom) = split(/:/, $tail);
4072: my @secs = &localenroll::get_sections($coursecode,$cdom);
4073: my $seclist = &escape(join(':',@secs));
4074:
4075: &Reply($client, "$seclist\n", $userinput);
4076:
4077:
4078: return 1;
4079: }
4080: ®ister_handler("autogetsections", \&get_sections_handler, 0, 1, 0);
4081:
4082: # Validate the owner of a new course section.
4083: #
4084: # Formal Parameters:
4085: # $cmd - Command that got us dispatched.
4086: # $tail - the remainder of the command. For us this consists of a
4087: # colon separated string containing:
4088: # $inst - Course Id from the institutions point of view.
4089: # $owner - Proposed owner of the course.
4090: # $cdom - Domain of the course (from the institutions
4091: # point of view?)..
4092: # $client - Socket open on the client.
4093: #
4094: # Returns:
4095: # 1 - Processing should continue.
4096: #
4097: sub validate_course_owner_handler {
4098: my ($cmd, $tail, $client) = @_;
4099: my $userinput = "$cmd:$tail";
4100: my ($inst_course_id, $owner, $cdom) = split(/:/, $tail);
4101:
4102: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom);
4103: &Reply($client, "$outcome\n", $userinput);
4104:
4105:
4106:
4107: return 1;
4108: }
4109: ®ister_handler("autonewcourse", \&validate_course_owner_handler, 0, 1, 0);
1.263 albertel 4110:
1.248 foxr 4111: #
4112: # Validate a course section in the official schedule of classes
4113: # from the institutions point of view (part of autoenrollment).
4114: #
4115: # Formal Parameters:
4116: # $cmd - The command request that got us dispatched.
4117: # $tail - The tail of the command. In this case,
4118: # this is a colon separated set of words that will be split
4119: # into:
4120: # $inst_course_id - The course/section id from the
4121: # institutions point of view.
4122: # $cdom - The domain from the institutions
4123: # point of view.
4124: # $client - Socket open on the client.
4125: # Returns:
4126: # 1 - Indicating processing should continue.
4127: #
4128: sub validate_course_section_handler {
4129: my ($cmd, $tail, $client) = @_;
4130: my $userinput = "$cmd:$tail";
4131: my ($inst_course_id, $cdom) = split(/:/, $tail);
4132:
4133: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
4134: &Reply($client, "$outcome\n", $userinput);
4135:
4136:
4137: return 1;
4138: }
4139: ®ister_handler("autovalidatecourse", \&validate_course_section_handler, 0, 1, 0);
4140:
4141: #
4142: # Create a password for a new auto-enrollment user.
4143: # I think/guess, this password allows access to the institutions
4144: # AIS class list server/services. Stuart can correct this comment
4145: # when he finds out how wrong I am.
4146: #
4147: # Formal Parameters:
4148: # $cmd - The command request that got us dispatched.
4149: # $tail - The tail of the command. In this case this is a colon separated
4150: # set of words that will be split into:
4151: # $authparam - An authentication parameter (username??).
4152: # $cdom - The domain of the course from the institution's
4153: # point of view.
4154: # $client - The socket open on the client.
4155: # Returns:
4156: # 1 - continue processing.
4157: #
4158: sub create_auto_enroll_password_handler {
4159: my ($cmd, $tail, $client) = @_;
4160: my $userinput = "$cmd:$tail";
4161:
4162: my ($authparam, $cdom) = split(/:/, $userinput);
4163:
4164: my ($create_passwd,$authchk);
4165: ($authparam,
4166: $create_passwd,
4167: $authchk) = &localenroll::create_password($authparam,$cdom);
4168:
4169: &Reply($client, &escape($authparam.':'.$create_passwd.':'.$authchk)."\n",
4170: $userinput);
4171:
4172:
4173: return 1;
4174: }
4175: ®ister_handler("autocreatepassword", \&create_auto_enroll_password_handler,
4176: 0, 1, 0);
4177:
4178: # Retrieve and remove temporary files created by/during autoenrollment.
4179: #
4180: # Formal Parameters:
4181: # $cmd - The command that got us dispatched.
4182: # $tail - The tail of the command. In our case this is a colon
4183: # separated list that will be split into:
4184: # $filename - The name of the file to remove.
4185: # The filename is given as a path relative to
4186: # the LonCAPA temp file directory.
4187: # $client - Socket open on the client.
4188: #
4189: # Returns:
4190: # 1 - Continue processing.
4191: sub retrieve_auto_file_handler {
4192: my ($cmd, $tail, $client) = @_;
4193: my $userinput = "cmd:$tail";
4194:
4195: my ($filename) = split(/:/, $tail);
4196:
4197: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
4198: if ( (-e $source) && ($filename ne '') ) {
4199: my $reply = '';
4200: if (open(my $fh,$source)) {
4201: while (<$fh>) {
4202: chomp($_);
4203: $_ =~ s/^\s+//g;
4204: $_ =~ s/\s+$//g;
4205: $reply .= $_;
4206: }
4207: close($fh);
4208: &Reply($client, &escape($reply)."\n", $userinput);
4209:
4210: # Does this have to be uncommented??!? (RF).
4211: #
4212: # unlink($source);
4213: } else {
4214: &Failure($client, "error\n", $userinput);
4215: }
4216: } else {
4217: &Failure($client, "error\n", $userinput);
4218: }
4219:
4220:
4221: return 1;
4222: }
4223: ®ister_handler("autoretrieve", \&retrieve_auto_file_handler, 0,1,0);
4224:
4225: #
4226: # Read and retrieve institutional code format (for support form).
4227: # Formal Parameters:
4228: # $cmd - Command that dispatched us.
4229: # $tail - Tail of the command. In this case it conatins
4230: # the course domain and the coursename.
4231: # $client - Socket open on the client.
4232: # Returns:
4233: # 1 - Continue processing.
4234: #
4235: sub get_institutional_code_format_handler {
4236: my ($cmd, $tail, $client) = @_;
4237: my $userinput = "$cmd:$tail";
4238:
4239: my $reply;
4240: my($cdom,$course) = split(/:/,$tail);
4241: my @pairs = split/\&/,$course;
4242: my %instcodes = ();
4243: my %codes = ();
4244: my @codetitles = ();
4245: my %cat_titles = ();
4246: my %cat_order = ();
4247: foreach (@pairs) {
4248: my ($key,$value) = split/=/,$_;
4249: $instcodes{&unescape($key)} = &unescape($value);
4250: }
4251: my $formatreply = &localenroll::instcode_format($cdom,
4252: \%instcodes,
4253: \%codes,
4254: \@codetitles,
4255: \%cat_titles,
4256: \%cat_order);
4257: if ($formatreply eq 'ok') {
4258: my $codes_str = &hash2str(%codes);
4259: my $codetitles_str = &array2str(@codetitles);
4260: my $cat_titles_str = &hash2str(%cat_titles);
4261: my $cat_order_str = &hash2str(%cat_order);
4262: &Reply($client,
4263: $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'
4264: .$cat_order_str."\n",
4265: $userinput);
4266: } else {
4267: # this else branch added by RF since if not ok, lonc will
4268: # hang waiting on reply until timeout.
4269: #
4270: &Reply($client, "format_error\n", $userinput);
4271: }
4272:
4273: return 1;
4274: }
1.265 albertel 4275: ®ister_handler("autoinstcodeformat",
4276: \&get_institutional_code_format_handler,0,1,0);
1.246 foxr 4277:
1.317 raeburn 4278: # Get domain specific conditions for import of student photographs to a course
4279: #
4280: # Retrieves information from photo_permission subroutine in localenroll.
4281: # Returns outcome (ok) if no processing errors, and whether course owner is
4282: # required to accept conditions of use (yes/no).
4283: #
4284: #
4285: sub photo_permission_handler {
4286: my ($cmd, $tail, $client) = @_;
4287: my $userinput = "$cmd:$tail";
4288: my $cdom = $tail;
4289: my ($perm_reqd,$conditions);
1.320 albertel 4290: my $outcome;
4291: eval {
4292: local($SIG{__DIE__})='DEFAULT';
4293: $outcome = &localenroll::photo_permission($cdom,\$perm_reqd,
4294: \$conditions);
4295: };
4296: if (!$@) {
4297: &Reply($client, &escape($outcome.':'.$perm_reqd.':'. $conditions)."\n",
4298: $userinput);
4299: } else {
4300: &Failure($client,"unknown_cmd\n",$userinput);
4301: }
4302: return 1;
1.317 raeburn 4303: }
4304: ®ister_handler("autophotopermission",\&photo_permission_handler,0,1,0);
4305:
4306: #
4307: # Checks if student photo is available for a user in the domain, in the user's
4308: # directory (in /userfiles/internal/studentphoto.jpg).
4309: # Uses localstudentphoto:fetch() to ensure there is an up to date copy of
4310: # the student's photo.
4311:
4312: sub photo_check_handler {
4313: my ($cmd, $tail, $client) = @_;
4314: my $userinput = "$cmd:$tail";
4315: my ($udom,$uname,$pid) = split(/:/,$tail);
4316: $udom = &unescape($udom);
4317: $uname = &unescape($uname);
4318: $pid = &unescape($pid);
4319: my $path=&propath($udom,$uname).'/userfiles/internal/';
4320: if (!-e $path) {
4321: &mkpath($path);
4322: }
4323: my $response;
4324: my $result = &localstudentphoto::fetch($udom,$uname,$pid,\$response);
4325: $result .= ':'.$response;
4326: &Reply($client, &escape($result)."\n",$userinput);
1.320 albertel 4327: return 1;
1.317 raeburn 4328: }
4329: ®ister_handler("autophotocheck",\&photo_check_handler,0,1,0);
4330:
4331: #
4332: # Retrieve information from localenroll about whether to provide a button
4333: # for users who have enbled import of student photos to initiate an
4334: # update of photo files for registered students. Also include
4335: # comment to display alongside button.
4336:
4337: sub photo_choice_handler {
4338: my ($cmd, $tail, $client) = @_;
4339: my $userinput = "$cmd:$tail";
4340: my $cdom = &unescape($tail);
1.320 albertel 4341: my ($update,$comment);
4342: eval {
4343: local($SIG{__DIE__})='DEFAULT';
4344: ($update,$comment) = &localenroll::manager_photo_update($cdom);
4345: };
4346: if (!$@) {
4347: &Reply($client,&escape($update).':'.&escape($comment)."\n",$userinput);
4348: } else {
4349: &Failure($client,"unknown_cmd\n",$userinput);
4350: }
4351: return 1;
1.317 raeburn 4352: }
4353: ®ister_handler("autophotochoice",\&photo_choice_handler,0,1,0);
4354:
1.265 albertel 4355: #
4356: # Gets a student's photo to exist (in the correct image type) in the user's
4357: # directory.
4358: # Formal Parameters:
4359: # $cmd - The command request that got us dispatched.
4360: # $tail - A colon separated set of words that will be split into:
4361: # $domain - student's domain
4362: # $uname - student username
4363: # $type - image type desired
4364: # $client - The socket open on the client.
4365: # Returns:
4366: # 1 - continue processing.
1.317 raeburn 4367:
1.265 albertel 4368: sub student_photo_handler {
4369: my ($cmd, $tail, $client) = @_;
1.317 raeburn 4370: my ($domain,$uname,$ext,$type) = split(/:/, $tail);
1.265 albertel 4371:
1.317 raeburn 4372: my $path=&propath($domain,$uname). '/userfiles/internal/';
4373: my $filename = 'studentphoto.'.$ext;
4374: if ($type eq 'thumbnail') {
4375: $filename = 'studentphoto_tn.'.$ext;
4376: }
4377: if (-e $path.$filename) {
1.265 albertel 4378: &Reply($client,"ok\n","$cmd:$tail");
4379: return 1;
4380: }
4381: &mkpath($path);
1.317 raeburn 4382: my $file;
4383: if ($type eq 'thumbnail') {
1.320 albertel 4384: eval {
4385: local($SIG{__DIE__})='DEFAULT';
4386: $file=&localstudentphoto::fetch_thumbnail($domain,$uname);
4387: };
1.317 raeburn 4388: } else {
4389: $file=&localstudentphoto::fetch($domain,$uname);
4390: }
1.265 albertel 4391: if (!$file) {
4392: &Failure($client,"unavailable\n","$cmd:$tail");
4393: return 1;
4394: }
1.317 raeburn 4395: if (!-e $path.$filename) { &convert_photo($file,$path.$filename); }
4396: if (-e $path.$filename) {
1.265 albertel 4397: &Reply($client,"ok\n","$cmd:$tail");
4398: return 1;
4399: }
4400: &Failure($client,"unable_to_convert\n","$cmd:$tail");
4401: return 1;
4402: }
4403: ®ister_handler("studentphoto", \&student_photo_handler, 0, 1, 0);
1.246 foxr 4404:
1.264 albertel 4405: # mkpath makes all directories for a file, expects an absolute path with a
4406: # file or a trailing / if just a dir is passed
4407: # returns 1 on success 0 on failure
4408: sub mkpath {
4409: my ($file)=@_;
4410: my @parts=split(/\//,$file,-1);
4411: my $now=$parts[0].'/'.$parts[1].'/'.$parts[2];
4412: for (my $i=3;$i<= ($#parts-1);$i++) {
1.265 albertel 4413: $now.='/'.$parts[$i];
1.264 albertel 4414: if (!-e $now) {
4415: if (!mkdir($now,0770)) { return 0; }
4416: }
4417: }
4418: return 1;
4419: }
4420:
1.207 foxr 4421: #---------------------------------------------------------------
4422: #
4423: # Getting, decoding and dispatching requests:
4424: #
4425: #
4426: # Get a Request:
4427: # Gets a Request message from the client. The transaction
4428: # is defined as a 'line' of text. We remove the new line
4429: # from the text line.
1.226 foxr 4430: #
1.211 albertel 4431: sub get_request {
1.207 foxr 4432: my $input = <$client>;
4433: chomp($input);
1.226 foxr 4434:
1.234 foxr 4435: &Debug("get_request: Request = $input\n");
1.207 foxr 4436:
4437: &status('Processing '.$clientname.':'.$input);
4438:
4439: return $input;
4440: }
1.212 foxr 4441: #---------------------------------------------------------------
4442: #
4443: # Process a request. This sub should shrink as each action
4444: # gets farmed out into a separat sub that is registered
4445: # with the dispatch hash.
4446: #
4447: # Parameters:
4448: # user_input - The request received from the client (lonc).
4449: # Returns:
4450: # true to keep processing, false if caller should exit.
4451: #
4452: sub process_request {
4453: my ($userinput) = @_; # Easier for now to break style than to
4454: # fix all the userinput -> user_input.
4455: my $wasenc = 0; # True if request was encrypted.
4456: # ------------------------------------------------------------ See if encrypted
1.322 albertel 4457: # for command
4458: # sethost:<server>
4459: # <command>:<args>
4460: # we just send it to the processor
4461: # for
4462: # sethost:<server>:<command>:<args>
4463: # we do the implict set host and then do the command
4464: if ($userinput =~ /^sethost:/) {
4465: (my $cmd,my $newid,$userinput) = split(':',$userinput,3);
4466: if (defined($userinput)) {
4467: &sethost("$cmd:$newid");
4468: } else {
4469: $userinput = "$cmd:$newid";
4470: }
4471: }
4472:
1.212 foxr 4473: if ($userinput =~ /^enc/) {
4474: $userinput = decipher($userinput);
4475: $wasenc=1;
4476: if(!$userinput) { # Cipher not defined.
1.251 foxr 4477: &Failure($client, "error: Encrypted data without negotated key\n");
1.212 foxr 4478: return 0;
4479: }
4480: }
4481: Debug("process_request: $userinput\n");
4482:
1.213 foxr 4483: #
4484: # The 'correct way' to add a command to lond is now to
4485: # write a sub to execute it and Add it to the command dispatch
4486: # hash via a call to register_handler.. The comments to that
4487: # sub should give you enough to go on to show how to do this
4488: # along with the examples that are building up as this code
4489: # is getting refactored. Until all branches of the
4490: # if/elseif monster below have been factored out into
4491: # separate procesor subs, if the dispatch hash is missing
4492: # the command keyword, we will fall through to the remainder
4493: # of the if/else chain below in order to keep this thing in
4494: # working order throughout the transmogrification.
4495:
4496: my ($command, $tail) = split(/:/, $userinput, 2);
4497: chomp($command);
4498: chomp($tail);
4499: $tail =~ s/(\r)//; # This helps people debugging with e.g. telnet.
1.214 foxr 4500: $command =~ s/(\r)//; # And this too for parameterless commands.
4501: if(!$tail) {
4502: $tail =""; # defined but blank.
4503: }
1.213 foxr 4504:
4505: &Debug("Command received: $command, encoded = $wasenc");
4506:
4507: if(defined $Dispatcher{$command}) {
4508:
4509: my $dispatch_info = $Dispatcher{$command};
4510: my $handler = $$dispatch_info[0];
4511: my $need_encode = $$dispatch_info[1];
4512: my $client_types = $$dispatch_info[2];
4513: Debug("Matched dispatch hash: mustencode: $need_encode "
4514: ."ClientType $client_types");
4515:
4516: # Validate the request:
4517:
4518: my $ok = 1;
4519: my $requesterprivs = 0;
4520: if(&isClient()) {
4521: $requesterprivs |= $CLIENT_OK;
4522: }
4523: if(&isManager()) {
4524: $requesterprivs |= $MANAGER_OK;
4525: }
4526: if($need_encode && (!$wasenc)) {
4527: Debug("Must encode but wasn't: $need_encode $wasenc");
4528: $ok = 0;
4529: }
4530: if(($client_types & $requesterprivs) == 0) {
4531: Debug("Client not privileged to do this operation");
4532: $ok = 0;
4533: }
4534:
4535: if($ok) {
4536: Debug("Dispatching to handler $command $tail");
4537: my $keep_going = &$handler($command, $tail, $client);
4538: return $keep_going;
4539: } else {
4540: Debug("Refusing to dispatch because client did not match requirements");
4541: Failure($client, "refused\n", $userinput);
4542: return 1;
4543: }
4544:
4545: }
4546:
1.262 foxr 4547: print $client "unknown_cmd\n";
1.212 foxr 4548: # -------------------------------------------------------------------- complete
4549: Debug("process_request - returning 1");
4550: return 1;
4551: }
1.207 foxr 4552: #
4553: # Decipher encoded traffic
4554: # Parameters:
4555: # input - Encoded data.
4556: # Returns:
4557: # Decoded data or undef if encryption key was not yet negotiated.
4558: # Implicit input:
4559: # cipher - This global holds the negotiated encryption key.
4560: #
1.211 albertel 4561: sub decipher {
1.207 foxr 4562: my ($input) = @_;
4563: my $output = '';
1.212 foxr 4564:
4565:
1.207 foxr 4566: if($cipher) {
4567: my($enc, $enclength, $encinput) = split(/:/, $input);
4568: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
4569: $output .=
4570: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
4571: }
4572: return substr($output, 0, $enclength);
4573: } else {
4574: return undef;
4575: }
4576: }
4577:
4578: #
4579: # Register a command processor. This function is invoked to register a sub
4580: # to process a request. Once registered, the ProcessRequest sub can automatically
4581: # dispatch requests to an appropriate sub, and do the top level validity checking
4582: # as well:
4583: # - Is the keyword recognized.
4584: # - Is the proper client type attempting the request.
4585: # - Is the request encrypted if it has to be.
4586: # Parameters:
4587: # $request_name - Name of the request being registered.
4588: # This is the command request that will match
4589: # against the hash keywords to lookup the information
4590: # associated with the dispatch information.
4591: # $procedure - Reference to a sub to call to process the request.
4592: # All subs get called as follows:
4593: # Procedure($cmd, $tail, $replyfd, $key)
4594: # $cmd - the actual keyword that invoked us.
4595: # $tail - the tail of the request that invoked us.
4596: # $replyfd- File descriptor connected to the client
4597: # $must_encode - True if the request must be encoded to be good.
4598: # $client_ok - True if it's ok for a client to request this.
4599: # $manager_ok - True if it's ok for a manager to request this.
4600: # Side effects:
4601: # - On success, the Dispatcher hash has an entry added for the key $RequestName
4602: # - On failure, the program will die as it's a bad internal bug to try to
4603: # register a duplicate command handler.
4604: #
1.211 albertel 4605: sub register_handler {
1.212 foxr 4606: my ($request_name,$procedure,$must_encode, $client_ok,$manager_ok) = @_;
1.207 foxr 4607:
4608: # Don't allow duplication#
4609:
4610: if (defined $Dispatcher{$request_name}) {
4611: die "Attempting to define a duplicate request handler for $request_name\n";
4612: }
4613: # Build the client type mask:
4614:
4615: my $client_type_mask = 0;
4616: if($client_ok) {
4617: $client_type_mask |= $CLIENT_OK;
4618: }
4619: if($manager_ok) {
4620: $client_type_mask |= $MANAGER_OK;
4621: }
4622:
4623: # Enter the hash:
4624:
4625: my @entry = ($procedure, $must_encode, $client_type_mask);
4626:
4627: $Dispatcher{$request_name} = \@entry;
4628:
4629: }
4630:
4631:
4632: #------------------------------------------------------------------
4633:
4634:
4635:
4636:
1.141 foxr 4637: #
1.96 foxr 4638: # Convert an error return code from lcpasswd to a string value.
4639: #
4640: sub lcpasswdstrerror {
4641: my $ErrorCode = shift;
1.97 foxr 4642: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
1.96 foxr 4643: return "lcpasswd Unrecognized error return value ".$ErrorCode;
4644: } else {
1.98 foxr 4645: return $passwderrors[$ErrorCode];
1.96 foxr 4646: }
4647: }
4648:
1.97 foxr 4649: #
4650: # Convert an error return code from lcuseradd to a string value:
4651: #
4652: sub lcuseraddstrerror {
4653: my $ErrorCode = shift;
4654: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
4655: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
4656: } else {
1.98 foxr 4657: return $adderrors[$ErrorCode];
1.97 foxr 4658: }
4659: }
4660:
1.23 harris41 4661: # grabs exception and records it to log before exiting
4662: sub catchexception {
1.27 albertel 4663: my ($error)=@_;
1.25 www 4664: $SIG{'QUIT'}='DEFAULT';
4665: $SIG{__DIE__}='DEFAULT';
1.165 albertel 4666: &status("Catching exception");
1.190 albertel 4667: &logthis("<font color='red'>CRITICAL: "
1.134 albertel 4668: ."ABNORMAL EXIT. Child $$ for server $thisserver died through "
1.27 albertel 4669: ."a crash with this error msg->[$error]</font>");
1.57 www 4670: &logthis('Famous last words: '.$status.' - '.$lastlog);
1.27 albertel 4671: if ($client) { print $client "error: $error\n"; }
1.59 www 4672: $server->close();
1.27 albertel 4673: die($error);
1.23 harris41 4674: }
1.63 www 4675: sub timeout {
1.165 albertel 4676: &status("Handling Timeout");
1.190 albertel 4677: &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
1.63 www 4678: &catchexception('Timeout');
4679: }
1.22 harris41 4680: # -------------------------------- Set signal handlers to record abnormal exits
4681:
1.226 foxr 4682:
1.22 harris41 4683: $SIG{'QUIT'}=\&catchexception;
4684: $SIG{__DIE__}=\&catchexception;
4685:
1.81 matthew 4686: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
1.95 harris41 4687: &status("Read loncapa.conf and loncapa_apache.conf");
4688: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
1.141 foxr 4689: %perlvar=%{$perlvarref};
1.80 harris41 4690: undef $perlvarref;
1.19 www 4691:
1.35 harris41 4692: # ----------------------------- Make sure this process is running from user=www
4693: my $wwwid=getpwnam('www');
4694: if ($wwwid!=$<) {
1.134 albertel 4695: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
4696: my $subj="LON: $currenthostid User ID mismatch";
1.37 harris41 4697: system("echo 'User ID mismatch. lond must be run as user www.' |\
1.35 harris41 4698: mailto $emailto -s '$subj' > /dev/null");
4699: exit 1;
4700: }
4701:
1.19 www 4702: # --------------------------------------------- Check if other instance running
4703:
4704: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
4705:
4706: if (-e $pidfile) {
4707: my $lfh=IO::File->new("$pidfile");
4708: my $pide=<$lfh>;
4709: chomp($pide);
1.29 harris41 4710: if (kill 0 => $pide) { die "already running"; }
1.19 www 4711: }
1.1 albertel 4712:
4713: # ------------------------------------------------------------- Read hosts file
4714:
4715:
4716:
4717: # establish SERVER socket, bind and listen.
4718: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
4719: Type => SOCK_STREAM,
4720: Proto => 'tcp',
4721: Reuse => 1,
4722: Listen => 10 )
1.29 harris41 4723: or die "making socket: $@\n";
1.1 albertel 4724:
4725: # --------------------------------------------------------- Do global variables
4726:
4727: # global variables
4728:
1.134 albertel 4729: my %children = (); # keys are current child process IDs
1.1 albertel 4730:
4731: sub REAPER { # takes care of dead children
4732: $SIG{CHLD} = \&REAPER;
1.165 albertel 4733: &status("Handling child death");
1.178 foxr 4734: my $pid;
4735: do {
4736: $pid = waitpid(-1,&WNOHANG());
4737: if (defined($children{$pid})) {
4738: &logthis("Child $pid died");
4739: delete($children{$pid});
1.183 albertel 4740: } elsif ($pid > 0) {
1.178 foxr 4741: &logthis("Unknown Child $pid died");
4742: }
4743: } while ( $pid > 0 );
4744: foreach my $child (keys(%children)) {
4745: $pid = waitpid($child,&WNOHANG());
4746: if ($pid > 0) {
4747: &logthis("Child $child - $pid looks like we missed it's death");
4748: delete($children{$pid});
4749: }
1.176 albertel 4750: }
1.165 albertel 4751: &status("Finished Handling child death");
1.1 albertel 4752: }
4753:
4754: sub HUNTSMAN { # signal handler for SIGINT
1.165 albertel 4755: &status("Killing children (INT)");
1.1 albertel 4756: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
4757: kill 'INT' => keys %children;
1.59 www 4758: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.1 albertel 4759: my $execdir=$perlvar{'lonDaemons'};
4760: unlink("$execdir/logs/lond.pid");
1.190 albertel 4761: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
1.165 albertel 4762: &status("Done killing children");
1.1 albertel 4763: exit; # clean up with dignity
4764: }
4765:
4766: sub HUPSMAN { # signal handler for SIGHUP
4767: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
1.165 albertel 4768: &status("Killing children for restart (HUP)");
1.1 albertel 4769: kill 'INT' => keys %children;
1.59 www 4770: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.190 albertel 4771: &logthis("<font color='red'>CRITICAL: Restarting</font>");
1.134 albertel 4772: my $execdir=$perlvar{'lonDaemons'};
1.30 harris41 4773: unlink("$execdir/logs/lond.pid");
1.165 albertel 4774: &status("Restarting self (HUP)");
1.1 albertel 4775: exec("$execdir/lond"); # here we go again
4776: }
4777:
1.144 foxr 4778: #
1.148 foxr 4779: # Kill off hashes that describe the host table prior to re-reading it.
4780: # Hashes affected are:
1.200 matthew 4781: # %hostid, %hostdom %hostip %hostdns.
1.148 foxr 4782: #
4783: sub KillHostHashes {
4784: foreach my $key (keys %hostid) {
4785: delete $hostid{$key};
4786: }
4787: foreach my $key (keys %hostdom) {
4788: delete $hostdom{$key};
4789: }
4790: foreach my $key (keys %hostip) {
4791: delete $hostip{$key};
4792: }
1.200 matthew 4793: foreach my $key (keys %hostdns) {
4794: delete $hostdns{$key};
4795: }
1.148 foxr 4796: }
4797: #
4798: # Read in the host table from file and distribute it into the various hashes:
4799: #
4800: # - %hostid - Indexed by IP, the loncapa hostname.
4801: # - %hostdom - Indexed by loncapa hostname, the domain.
4802: # - %hostip - Indexed by hostid, the Ip address of the host.
4803: sub ReadHostTable {
4804:
4805: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
1.200 matthew 4806: my $myloncapaname = $perlvar{'lonHostID'};
4807: Debug("My loncapa name is : $myloncapaname");
1.296 albertel 4808: my %name_to_ip;
1.148 foxr 4809: while (my $configline=<CONFIG>) {
1.277 albertel 4810: if ($configline !~ /^\s*\#/ && $configline !~ /^\s*$/ ) {
4811: my ($id,$domain,$role,$name)=split(/:/,$configline);
4812: $name=~s/\s//g;
1.296 albertel 4813: my $ip;
4814: if (!exists($name_to_ip{$name})) {
4815: $ip = gethostbyname($name);
4816: if (!$ip || length($ip) ne 4) {
4817: &logthis("Skipping host $id name $name no IP found\n");
4818: next;
4819: }
4820: $ip=inet_ntoa($ip);
4821: $name_to_ip{$name} = $ip;
4822: } else {
4823: $ip = $name_to_ip{$name};
1.277 albertel 4824: }
1.200 matthew 4825: $hostid{$ip}=$id; # LonCAPA name of host by IP.
4826: $hostdom{$id}=$domain; # LonCAPA domain name of host.
1.307 albertel 4827: $hostname{$id}=$name; # LonCAPA name -> DNS name
1.277 albertel 4828: $hostip{$id}=$ip; # IP address of host.
1.200 matthew 4829: $hostdns{$name} = $id; # LonCAPA name of host by DNS.
4830:
4831: if ($id eq $perlvar{'lonHostID'}) {
4832: Debug("Found me in the host table: $name");
4833: $thisserver=$name;
4834: }
1.178 foxr 4835: }
1.148 foxr 4836: }
4837: close(CONFIG);
4838: }
4839: #
4840: # Reload the Apache daemon's state.
1.150 foxr 4841: # This is done by invoking /home/httpd/perl/apachereload
4842: # a setuid perl script that can be root for us to do this job.
1.148 foxr 4843: #
4844: sub ReloadApache {
1.150 foxr 4845: my $execdir = $perlvar{'lonDaemons'};
4846: my $script = $execdir."/apachereload";
4847: system($script);
1.148 foxr 4848: }
4849:
4850: #
1.144 foxr 4851: # Called in response to a USR2 signal.
4852: # - Reread hosts.tab
4853: # - All children connected to hosts that were removed from hosts.tab
4854: # are killed via SIGINT
4855: # - All children connected to previously existing hosts are sent SIGUSR1
4856: # - Our internal hosts hash is updated to reflect the new contents of
4857: # hosts.tab causing connections from hosts added to hosts.tab to
4858: # now be honored.
4859: #
4860: sub UpdateHosts {
1.165 albertel 4861: &status("Reload hosts.tab");
1.147 foxr 4862: logthis('<font color="blue"> Updating connections </font>');
1.148 foxr 4863: #
4864: # The %children hash has the set of IP's we currently have children
4865: # on. These need to be matched against records in the hosts.tab
4866: # Any ip's no longer in the table get killed off they correspond to
4867: # either dropped or changed hosts. Note that the re-read of the table
4868: # will take care of new and changed hosts as connections come into being.
4869:
4870:
4871: KillHostHashes;
4872: ReadHostTable;
4873:
4874: foreach my $child (keys %children) {
4875: my $childip = $children{$child};
4876: if(!$hostid{$childip}) {
1.149 foxr 4877: logthis('<font color="blue"> UpdateHosts killing child '
4878: ." $child for ip $childip </font>");
1.148 foxr 4879: kill('INT', $child);
1.149 foxr 4880: } else {
4881: logthis('<font color="green"> keeping child for ip '
4882: ." $childip (pid=$child) </font>");
1.148 foxr 4883: }
4884: }
4885: ReloadApache;
1.165 albertel 4886: &status("Finished reloading hosts.tab");
1.144 foxr 4887: }
4888:
1.148 foxr 4889:
1.57 www 4890: sub checkchildren {
1.165 albertel 4891: &status("Checking on the children (sending signals)");
1.57 www 4892: &initnewstatus();
4893: &logstatus();
4894: &logthis('Going to check on the children');
1.134 albertel 4895: my $docdir=$perlvar{'lonDocRoot'};
1.61 harris41 4896: foreach (sort keys %children) {
1.221 albertel 4897: #sleep 1;
1.57 www 4898: unless (kill 'USR1' => $_) {
4899: &logthis ('Child '.$_.' is dead');
4900: &logstatus($$.' is dead');
1.221 albertel 4901: delete($children{$_});
1.57 www 4902: }
1.61 harris41 4903: }
1.63 www 4904: sleep 5;
1.212 foxr 4905: $SIG{ALRM} = sub { Debug("timeout");
4906: die "timeout"; };
1.113 albertel 4907: $SIG{__DIE__} = 'DEFAULT';
1.165 albertel 4908: &status("Checking on the children (waiting for reports)");
1.63 www 4909: foreach (sort keys %children) {
4910: unless (-e "$docdir/lon-status/londchld/$_.txt") {
1.113 albertel 4911: eval {
4912: alarm(300);
1.63 www 4913: &logthis('Child '.$_.' did not respond');
1.67 albertel 4914: kill 9 => $_;
1.131 albertel 4915: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
4916: #$subj="LON: $currenthostid killed lond process $_";
4917: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
4918: #$execdir=$perlvar{'lonDaemons'};
4919: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
1.221 albertel 4920: delete($children{$_});
1.113 albertel 4921: alarm(0);
4922: }
1.63 www 4923: }
4924: }
1.113 albertel 4925: $SIG{ALRM} = 'DEFAULT';
1.155 albertel 4926: $SIG{__DIE__} = \&catchexception;
1.165 albertel 4927: &status("Finished checking children");
1.221 albertel 4928: &logthis('Finished Checking children');
1.57 www 4929: }
4930:
1.1 albertel 4931: # --------------------------------------------------------------------- Logging
4932:
4933: sub logthis {
4934: my $message=shift;
4935: my $execdir=$perlvar{'lonDaemons'};
4936: my $fh=IO::File->new(">>$execdir/logs/lond.log");
4937: my $now=time;
4938: my $local=localtime($now);
1.58 www 4939: $lastlog=$local.': '.$message;
1.1 albertel 4940: print $fh "$local ($$): $message\n";
4941: }
4942:
1.77 foxr 4943: # ------------------------- Conditional log if $DEBUG true.
4944: sub Debug {
4945: my $message = shift;
4946: if($DEBUG) {
4947: &logthis($message);
4948: }
4949: }
1.161 foxr 4950:
4951: #
4952: # Sub to do replies to client.. this gives a hook for some
4953: # debug tracing too:
4954: # Parameters:
4955: # fd - File open on client.
4956: # reply - Text to send to client.
4957: # request - Original request from client.
4958: #
4959: sub Reply {
1.192 foxr 4960: my ($fd, $reply, $request) = @_;
1.161 foxr 4961: print $fd $reply;
4962: Debug("Request was $request Reply was $reply");
4963:
1.212 foxr 4964: $Transactions++;
4965: }
4966:
4967:
4968: #
4969: # Sub to report a failure.
4970: # This function:
4971: # - Increments the failure statistic counters.
4972: # - Invokes Reply to send the error message to the client.
4973: # Parameters:
4974: # fd - File descriptor open on the client
4975: # reply - Reply text to emit.
4976: # request - The original request message (used by Reply
4977: # to debug if that's enabled.
4978: # Implicit outputs:
4979: # $Failures- The number of failures is incremented.
4980: # Reply (invoked here) sends a message to the
4981: # client:
4982: #
4983: sub Failure {
4984: my $fd = shift;
4985: my $reply = shift;
4986: my $request = shift;
4987:
4988: $Failures++;
4989: Reply($fd, $reply, $request); # That's simple eh?
1.161 foxr 4990: }
1.57 www 4991: # ------------------------------------------------------------------ Log status
4992:
4993: sub logstatus {
1.178 foxr 4994: &status("Doing logging");
4995: my $docdir=$perlvar{'lonDocRoot'};
4996: {
4997: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
1.200 matthew 4998: print $fh $status."\n".$lastlog."\n".time."\n$keymode";
1.178 foxr 4999: $fh->close();
5000: }
1.221 albertel 5001: &status("Finished $$.txt");
5002: {
5003: open(LOG,">>$docdir/lon-status/londstatus.txt");
5004: flock(LOG,LOCK_EX);
5005: print LOG $$."\t".$clientname."\t".$currenthostid."\t"
5006: .$status."\t".$lastlog."\t $keymode\n";
1.275 albertel 5007: flock(LOG,LOCK_UN);
1.221 albertel 5008: close(LOG);
5009: }
1.178 foxr 5010: &status("Finished logging");
1.57 www 5011: }
5012:
5013: sub initnewstatus {
5014: my $docdir=$perlvar{'lonDocRoot'};
5015: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
5016: my $now=time;
5017: my $local=localtime($now);
5018: print $fh "LOND status $local - parent $$\n\n";
1.64 www 5019: opendir(DIR,"$docdir/lon-status/londchld");
1.134 albertel 5020: while (my $filename=readdir(DIR)) {
1.64 www 5021: unlink("$docdir/lon-status/londchld/$filename");
5022: }
5023: closedir(DIR);
1.57 www 5024: }
5025:
5026: # -------------------------------------------------------------- Status setting
5027:
5028: sub status {
5029: my $what=shift;
5030: my $now=time;
5031: my $local=localtime($now);
1.178 foxr 5032: $status=$local.': '.$what;
5033: $0='lond: '.$what.' '.$local;
1.57 www 5034: }
1.11 www 5035:
1.1 albertel 5036: # ----------------------------------------------------------- Send USR1 to lonc
5037:
5038: sub reconlonc {
5039: my $peerfile=shift;
5040: &logthis("Trying to reconnect for $peerfile");
5041: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
5042: if (my $fh=IO::File->new("$loncfile")) {
5043: my $loncpid=<$fh>;
5044: chomp($loncpid);
5045: if (kill 0 => $loncpid) {
5046: &logthis("lonc at pid $loncpid responding, sending USR1");
5047: kill USR1 => $loncpid;
5048: } else {
1.9 www 5049: &logthis(
1.190 albertel 5050: "<font color='red'>CRITICAL: "
1.9 www 5051: ."lonc at pid $loncpid not responding, giving up</font>");
1.1 albertel 5052: }
5053: } else {
1.190 albertel 5054: &logthis('<font color="red">CRITICAL: lonc not running, giving up</font>');
1.1 albertel 5055: }
5056: }
5057:
5058: # -------------------------------------------------- Non-critical communication
1.11 www 5059:
1.1 albertel 5060: sub subreply {
5061: my ($cmd,$server)=@_;
1.307 albertel 5062: my $peerfile="$perlvar{'lonSockDir'}/".$hostname{$server};
1.1 albertel 5063: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
5064: Type => SOCK_STREAM,
5065: Timeout => 10)
5066: or return "con_lost";
1.307 albertel 5067: print $sclient "sethost:$server:$cmd\n";
1.1 albertel 5068: my $answer=<$sclient>;
5069: chomp($answer);
5070: if (!$answer) { $answer="con_lost"; }
5071: return $answer;
5072: }
5073:
5074: sub reply {
5075: my ($cmd,$server)=@_;
5076: my $answer;
1.115 albertel 5077: if ($server ne $currenthostid) {
1.1 albertel 5078: $answer=subreply($cmd,$server);
5079: if ($answer eq 'con_lost') {
5080: $answer=subreply("ping",$server);
5081: if ($answer ne $server) {
1.115 albertel 5082: &logthis("sub reply: answer != server answer is $answer, server is $server");
1.307 albertel 5083: &reconlonc("$perlvar{'lonSockDir'}/".$hostname{$server});
1.1 albertel 5084: }
5085: $answer=subreply($cmd,$server);
5086: }
5087: } else {
5088: $answer='self_reply';
5089: }
5090: return $answer;
5091: }
5092:
1.13 www 5093: # -------------------------------------------------------------- Talk to lonsql
5094:
1.234 foxr 5095: sub sql_reply {
1.12 harris41 5096: my ($cmd)=@_;
1.234 foxr 5097: my $answer=&sub_sql_reply($cmd);
5098: if ($answer eq 'con_lost') { $answer=&sub_sql_reply($cmd); }
1.12 harris41 5099: return $answer;
5100: }
5101:
1.234 foxr 5102: sub sub_sql_reply {
1.12 harris41 5103: my ($cmd)=@_;
5104: my $unixsock="mysqlsock";
5105: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
5106: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
5107: Type => SOCK_STREAM,
5108: Timeout => 10)
5109: or return "con_lost";
1.319 www 5110: print $sclient "$cmd:$currentdomainid\n";
1.12 harris41 5111: my $answer=<$sclient>;
5112: chomp($answer);
5113: if (!$answer) { $answer="con_lost"; }
5114: return $answer;
5115: }
5116:
1.1 albertel 5117: # --------------------------------------- Is this the home server of an author?
1.11 www 5118:
1.1 albertel 5119: sub ishome {
5120: my $author=shift;
5121: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
5122: my ($udom,$uname)=split(/\//,$author);
5123: my $proname=propath($udom,$uname);
5124: if (-e $proname) {
5125: return 'owner';
5126: } else {
5127: return 'not_owner';
5128: }
5129: }
5130:
5131: # ======================================================= Continue main program
5132: # ---------------------------------------------------- Fork once and dissociate
5133:
1.134 albertel 5134: my $fpid=fork;
1.1 albertel 5135: exit if $fpid;
1.29 harris41 5136: die "Couldn't fork: $!" unless defined ($fpid);
1.1 albertel 5137:
1.29 harris41 5138: POSIX::setsid() or die "Can't start new session: $!";
1.1 albertel 5139:
5140: # ------------------------------------------------------- Write our PID on disk
5141:
1.134 albertel 5142: my $execdir=$perlvar{'lonDaemons'};
1.1 albertel 5143: open (PIDSAVE,">$execdir/logs/lond.pid");
5144: print PIDSAVE "$$\n";
5145: close(PIDSAVE);
1.190 albertel 5146: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
1.57 www 5147: &status('Starting');
1.1 albertel 5148:
1.106 foxr 5149:
1.1 albertel 5150:
5151: # ----------------------------------------------------- Install signal handlers
5152:
1.57 www 5153:
1.1 albertel 5154: $SIG{CHLD} = \&REAPER;
5155: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
5156: $SIG{HUP} = \&HUPSMAN;
1.57 www 5157: $SIG{USR1} = \&checkchildren;
1.144 foxr 5158: $SIG{USR2} = \&UpdateHosts;
1.106 foxr 5159:
1.148 foxr 5160: # Read the host hashes:
5161:
5162: ReadHostTable;
1.106 foxr 5163:
1.286 albertel 5164: my $dist=`$perlvar{'lonDaemons'}/distprobe`;
5165:
1.106 foxr 5166: # --------------------------------------------------------------
5167: # Accept connections. When a connection comes in, it is validated
5168: # and if good, a child process is created to process transactions
5169: # along the connection.
5170:
1.1 albertel 5171: while (1) {
1.165 albertel 5172: &status('Starting accept');
1.106 foxr 5173: $client = $server->accept() or next;
1.165 albertel 5174: &status('Accepted '.$client.' off to spawn');
1.106 foxr 5175: make_new_child($client);
1.165 albertel 5176: &status('Finished spawning');
1.1 albertel 5177: }
5178:
1.212 foxr 5179: sub make_new_child {
5180: my $pid;
5181: # my $cipher; # Now global
5182: my $sigset;
1.178 foxr 5183:
1.212 foxr 5184: $client = shift;
5185: &status('Starting new child '.$client);
5186: &logthis('<font color="green"> Attempting to start child ('.$client.
5187: ")</font>");
5188: # block signal for fork
5189: $sigset = POSIX::SigSet->new(SIGINT);
5190: sigprocmask(SIG_BLOCK, $sigset)
5191: or die "Can't block SIGINT for fork: $!\n";
1.178 foxr 5192:
1.212 foxr 5193: die "fork: $!" unless defined ($pid = fork);
1.178 foxr 5194:
1.212 foxr 5195: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
5196: # connection liveness.
1.178 foxr 5197:
1.212 foxr 5198: #
5199: # Figure out who we're talking to so we can record the peer in
5200: # the pid hash.
5201: #
5202: my $caller = getpeername($client);
5203: my ($port,$iaddr);
5204: if (defined($caller) && length($caller) > 0) {
5205: ($port,$iaddr)=unpack_sockaddr_in($caller);
5206: } else {
5207: &logthis("Unable to determine who caller was, getpeername returned nothing");
5208: }
5209: if (defined($iaddr)) {
5210: $clientip = inet_ntoa($iaddr);
5211: Debug("Connected with $clientip");
5212: } else {
5213: &logthis("Unable to determine clientip");
5214: $clientip='Unavailable';
5215: }
5216:
5217: if ($pid) {
5218: # Parent records the child's birth and returns.
5219: sigprocmask(SIG_UNBLOCK, $sigset)
5220: or die "Can't unblock SIGINT for fork: $!\n";
5221: $children{$pid} = $clientip;
5222: &status('Started child '.$pid);
5223: return;
5224: } else {
5225: # Child can *not* return from this subroutine.
5226: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
5227: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
5228: #don't get intercepted
5229: $SIG{USR1}= \&logstatus;
5230: $SIG{ALRM}= \&timeout;
5231: $lastlog='Forked ';
5232: $status='Forked';
1.178 foxr 5233:
1.212 foxr 5234: # unblock signals
5235: sigprocmask(SIG_UNBLOCK, $sigset)
5236: or die "Can't unblock SIGINT for fork: $!\n";
1.178 foxr 5237:
1.212 foxr 5238: # my $tmpsnum=0; # Now global
5239: #---------------------------------------------------- kerberos 5 initialization
5240: &Authen::Krb5::init_context();
1.297 raeburn 5241: unless (($dist eq 'fedora4') || ($dist eq 'suse9.3')) {
1.286 albertel 5242: &Authen::Krb5::init_ets();
5243: }
1.209 albertel 5244:
1.212 foxr 5245: &status('Accepted connection');
5246: # =============================================================================
5247: # do something with the connection
5248: # -----------------------------------------------------------------------------
5249: # see if we know client and 'check' for spoof IP by ineffective challenge
1.178 foxr 5250:
1.212 foxr 5251: ReadManagerTable; # May also be a manager!!
5252:
1.278 albertel 5253: my $outsideip=$clientip;
5254: if ($clientip eq '127.0.0.1') {
5255: $outsideip=$hostip{$perlvar{'lonHostID'}};
5256: }
5257:
5258: my $clientrec=($hostid{$outsideip} ne undef);
5259: my $ismanager=($managers{$outsideip} ne undef);
1.212 foxr 5260: $clientname = "[unknonwn]";
5261: if($clientrec) { # Establish client type.
5262: $ConnectionType = "client";
1.278 albertel 5263: $clientname = $hostid{$outsideip};
1.212 foxr 5264: if($ismanager) {
5265: $ConnectionType = "both";
5266: }
5267: } else {
5268: $ConnectionType = "manager";
1.278 albertel 5269: $clientname = $managers{$outsideip};
1.212 foxr 5270: }
5271: my $clientok;
1.178 foxr 5272:
1.212 foxr 5273: if ($clientrec || $ismanager) {
5274: &status("Waiting for init from $clientip $clientname");
5275: &logthis('<font color="yellow">INFO: Connection, '.
5276: $clientip.
5277: " ($clientname) connection type = $ConnectionType </font>" );
5278: &status("Connecting $clientip ($clientname))");
5279: my $remotereq=<$client>;
5280: chomp($remotereq);
5281: Debug("Got init: $remotereq");
5282: my $inikeyword = split(/:/, $remotereq);
5283: if ($remotereq =~ /^init/) {
5284: &sethost("sethost:$perlvar{'lonHostID'}");
5285: #
5286: # If the remote is attempting a local init... give that a try:
5287: #
5288: my ($i, $inittype) = split(/:/, $remotereq);
1.209 albertel 5289:
1.212 foxr 5290: # If the connection type is ssl, but I didn't get my
5291: # certificate files yet, then I'll drop back to
5292: # insecure (if allowed).
5293:
5294: if($inittype eq "ssl") {
5295: my ($ca, $cert) = lonssl::CertificateFile;
5296: my $kfile = lonssl::KeyFile;
5297: if((!$ca) ||
5298: (!$cert) ||
5299: (!$kfile)) {
5300: $inittype = ""; # This forces insecure attempt.
5301: &logthis("<font color=\"blue\"> Certificates not "
5302: ."installed -- trying insecure auth</font>");
1.224 foxr 5303: } else { # SSL certificates are in place so
1.212 foxr 5304: } # Leave the inittype alone.
5305: }
5306:
5307: if($inittype eq "local") {
5308: my $key = LocalConnection($client, $remotereq);
5309: if($key) {
5310: Debug("Got local key $key");
5311: $clientok = 1;
5312: my $cipherkey = pack("H32", $key);
5313: $cipher = new IDEA($cipherkey);
5314: print $client "ok:local\n";
5315: &logthis('<font color="green"'
5316: . "Successful local authentication </font>");
5317: $keymode = "local"
1.178 foxr 5318: } else {
1.212 foxr 5319: Debug("Failed to get local key");
5320: $clientok = 0;
5321: shutdown($client, 3);
5322: close $client;
1.178 foxr 5323: }
1.212 foxr 5324: } elsif ($inittype eq "ssl") {
5325: my $key = SSLConnection($client);
5326: if ($key) {
5327: $clientok = 1;
5328: my $cipherkey = pack("H32", $key);
5329: $cipher = new IDEA($cipherkey);
5330: &logthis('<font color="green">'
5331: ."Successfull ssl authentication with $clientname </font>");
5332: $keymode = "ssl";
5333:
1.178 foxr 5334: } else {
1.212 foxr 5335: $clientok = 0;
5336: close $client;
1.178 foxr 5337: }
1.212 foxr 5338:
5339: } else {
5340: my $ok = InsecureConnection($client);
5341: if($ok) {
5342: $clientok = 1;
5343: &logthis('<font color="green">'
5344: ."Successful insecure authentication with $clientname </font>");
5345: print $client "ok\n";
5346: $keymode = "insecure";
1.178 foxr 5347: } else {
1.212 foxr 5348: &logthis('<font color="yellow">'
5349: ."Attempted insecure connection disallowed </font>");
5350: close $client;
5351: $clientok = 0;
1.178 foxr 5352:
5353: }
5354: }
1.212 foxr 5355: } else {
5356: &logthis(
5357: "<font color='blue'>WARNING: "
5358: ."$clientip failed to initialize: >$remotereq< </font>");
5359: &status('No init '.$clientip);
5360: }
5361:
5362: } else {
5363: &logthis(
5364: "<font color='blue'>WARNING: Unknown client $clientip</font>");
5365: &status('Hung up on '.$clientip);
5366: }
5367:
5368: if ($clientok) {
5369: # ---------------- New known client connecting, could mean machine online again
5370:
5371: foreach my $id (keys(%hostip)) {
5372: if ($hostip{$id} ne $clientip ||
5373: $hostip{$currenthostid} eq $clientip) {
5374: # no need to try to do recon's to myself
5375: next;
5376: }
1.307 albertel 5377: &reconlonc("$perlvar{'lonSockDir'}/".$hostname{$id});
1.212 foxr 5378: }
5379: &logthis("<font color='green'>Established connection: $clientname</font>");
5380: &status('Will listen to '.$clientname);
5381: # ------------------------------------------------------------ Process requests
5382: my $keep_going = 1;
5383: my $user_input;
5384: while(($user_input = get_request) && $keep_going) {
5385: alarm(120);
5386: Debug("Main: Got $user_input\n");
5387: $keep_going = &process_request($user_input);
1.178 foxr 5388: alarm(0);
1.212 foxr 5389: &status('Listening to '.$clientname." ($keymode)");
1.161 foxr 5390: }
1.212 foxr 5391:
1.59 www 5392: # --------------------------------------------- client unknown or fishy, refuse
1.212 foxr 5393: } else {
1.161 foxr 5394: print $client "refused\n";
5395: $client->close();
1.190 albertel 5396: &logthis("<font color='blue'>WARNING: "
1.161 foxr 5397: ."Rejected client $clientip, closing connection</font>");
5398: }
1.212 foxr 5399: }
1.161 foxr 5400:
1.1 albertel 5401: # =============================================================================
1.161 foxr 5402:
1.190 albertel 5403: &logthis("<font color='red'>CRITICAL: "
1.161 foxr 5404: ."Disconnect from $clientip ($clientname)</font>");
5405:
5406:
5407: # this exit is VERY important, otherwise the child will become
5408: # a producer of more and more children, forking yourself into
5409: # process death.
5410: exit;
1.106 foxr 5411:
1.78 foxr 5412: }
1.261 foxr 5413: #
5414: # Determine if a user is an author for the indicated domain.
5415: #
5416: # Parameters:
5417: # domain - domain to check in .
5418: # user - Name of user to check.
5419: #
5420: # Return:
5421: # 1 - User is an author for domain.
5422: # 0 - User is not an author for domain.
5423: sub is_author {
5424: my ($domain, $user) = @_;
5425:
5426: &Debug("is_author: $user @ $domain");
5427:
5428: my $hashref = &tie_user_hash($domain, $user, "roles",
5429: &GDBM_READER());
5430:
5431: # Author role should show up as a key /domain/_au
1.78 foxr 5432:
1.321 albertel 5433: my $key = "/$domain/_au";
5434: my $value;
5435: if (defined($hashref)) {
5436: $value = $hashref->{$key};
5437: }
1.78 foxr 5438:
1.261 foxr 5439: if(defined($value)) {
5440: &Debug("$user @ $domain is an author");
5441: }
5442:
5443: return defined($value);
5444: }
1.78 foxr 5445: #
5446: # Checks to see if the input roleput request was to set
5447: # an author role. If so, invokes the lchtmldir script to set
5448: # up a correct public_html
5449: # Parameters:
5450: # request - The request sent to the rolesput subchunk.
5451: # We're looking for /domain/_au
5452: # domain - The domain in which the user is having roles doctored.
5453: # user - Name of the user for which the role is being put.
5454: # authtype - The authentication type associated with the user.
5455: #
1.289 albertel 5456: sub manage_permissions {
1.192 foxr 5457: my ($request, $domain, $user, $authtype) = @_;
1.78 foxr 5458:
1.261 foxr 5459: &Debug("manage_permissions: $request $domain $user $authtype");
5460:
1.78 foxr 5461: # See if the request is of the form /$domain/_au
1.289 albertel 5462: if($request =~ /^(\/\Q$domain\E\/_au)$/) { # It's an author rolesput...
1.78 foxr 5463: my $execdir = $perlvar{'lonDaemons'};
5464: my $userhome= "/home/$user" ;
1.134 albertel 5465: &logthis("system $execdir/lchtmldir $userhome $user $authtype");
1.261 foxr 5466: &Debug("Setting homedir permissions for $userhome");
1.78 foxr 5467: system("$execdir/lchtmldir $userhome $user $authtype");
5468: }
5469: }
1.222 foxr 5470:
5471:
5472: #
5473: # Return the full path of a user password file, whether it exists or not.
5474: # Parameters:
5475: # domain - Domain in which the password file lives.
5476: # user - name of the user.
5477: # Returns:
5478: # Full passwd path:
5479: #
5480: sub password_path {
5481: my ($domain, $user) = @_;
1.264 albertel 5482: return &propath($domain, $user).'/passwd';
1.222 foxr 5483: }
5484:
5485: # Password Filename
5486: # Returns the path to a passwd file given domain and user... only if
5487: # it exists.
5488: # Parameters:
5489: # domain - Domain in which to search.
5490: # user - username.
5491: # Returns:
5492: # - If the password file exists returns its path.
5493: # - If the password file does not exist, returns undefined.
5494: #
5495: sub password_filename {
5496: my ($domain, $user) = @_;
5497:
5498: Debug ("PasswordFilename called: dom = $domain user = $user");
5499:
5500: my $path = &password_path($domain, $user);
5501: Debug("PasswordFilename got path: $path");
5502: if(-e $path) {
5503: return $path;
5504: } else {
5505: return undef;
5506: }
5507: }
5508:
5509: #
5510: # Rewrite the contents of the user's passwd file.
5511: # Parameters:
5512: # domain - domain of the user.
5513: # name - User's name.
5514: # contents - New contents of the file.
5515: # Returns:
5516: # 0 - Failed.
5517: # 1 - Success.
5518: #
5519: sub rewrite_password_file {
5520: my ($domain, $user, $contents) = @_;
5521:
5522: my $file = &password_filename($domain, $user);
5523: if (defined $file) {
5524: my $pf = IO::File->new(">$file");
5525: if($pf) {
5526: print $pf "$contents\n";
5527: return 1;
5528: } else {
5529: return 0;
5530: }
5531: } else {
5532: return 0;
5533: }
5534:
5535: }
5536:
1.78 foxr 5537: #
1.222 foxr 5538: # get_auth_type - Determines the authorization type of a user in a domain.
1.78 foxr 5539:
5540: # Returns the authorization type or nouser if there is no such user.
5541: #
1.222 foxr 5542: sub get_auth_type
1.78 foxr 5543: {
1.192 foxr 5544:
5545: my ($domain, $user) = @_;
1.78 foxr 5546:
1.222 foxr 5547: Debug("get_auth_type( $domain, $user ) \n");
1.78 foxr 5548: my $proname = &propath($domain, $user);
5549: my $passwdfile = "$proname/passwd";
5550: if( -e $passwdfile ) {
5551: my $pf = IO::File->new($passwdfile);
5552: my $realpassword = <$pf>;
5553: chomp($realpassword);
1.79 foxr 5554: Debug("Password info = $realpassword\n");
1.78 foxr 5555: my ($authtype, $contentpwd) = split(/:/, $realpassword);
1.79 foxr 5556: Debug("Authtype = $authtype, content = $contentpwd\n");
1.259 raeburn 5557: return "$authtype:$contentpwd";
1.224 foxr 5558: } else {
1.79 foxr 5559: Debug("Returning nouser");
1.78 foxr 5560: return "nouser";
5561: }
1.1 albertel 5562: }
5563:
1.220 foxr 5564: #
5565: # Validate a user given their domain, name and password. This utility
5566: # function is used by both AuthenticateHandler and ChangePasswordHandler
5567: # to validate the login credentials of a user.
5568: # Parameters:
5569: # $domain - The domain being logged into (this is required due to
5570: # the capability for multihomed systems.
5571: # $user - The name of the user being validated.
5572: # $password - The user's propoposed password.
5573: #
5574: # Returns:
5575: # 1 - The domain,user,pasword triplet corresponds to a valid
5576: # user.
5577: # 0 - The domain,user,password triplet is not a valid user.
5578: #
5579: sub validate_user {
5580: my ($domain, $user, $password) = @_;
5581:
5582:
5583: # Why negative ~pi you may well ask? Well this function is about
5584: # authentication, and therefore very important to get right.
5585: # I've initialized the flag that determines whether or not I've
5586: # validated correctly to a value it's not supposed to get.
5587: # At the end of this function. I'll ensure that it's not still that
5588: # value so we don't just wind up returning some accidental value
5589: # as a result of executing an unforseen code path that
1.249 foxr 5590: # did not set $validated. At the end of valid execution paths,
5591: # validated shoule be 1 for success or 0 for failuer.
1.220 foxr 5592:
5593: my $validated = -3.14159;
5594:
5595: # How we authenticate is determined by the type of authentication
5596: # the user has been assigned. If the authentication type is
5597: # "nouser", the user does not exist so we will return 0.
5598:
1.222 foxr 5599: my $contents = &get_auth_type($domain, $user);
1.220 foxr 5600: my ($howpwd, $contentpwd) = split(/:/, $contents);
5601:
5602: my $null = pack("C",0); # Used by kerberos auth types.
5603:
5604: if ($howpwd ne 'nouser') {
5605:
5606: if($howpwd eq "internal") { # Encrypted is in local password file.
5607: $validated = (crypt($password, $contentpwd) eq $contentpwd);
5608: }
5609: elsif ($howpwd eq "unix") { # User is a normal unix user.
5610: $contentpwd = (getpwnam($user))[1];
5611: if($contentpwd) {
5612: if($contentpwd eq 'x') { # Shadow password file...
5613: my $pwauth_path = "/usr/local/sbin/pwauth";
5614: open PWAUTH, "|$pwauth_path" or
5615: die "Cannot invoke authentication";
5616: print PWAUTH "$user\n$password\n";
5617: close PWAUTH;
5618: $validated = ! $?;
5619:
5620: } else { # Passwords in /etc/passwd.
5621: $validated = (crypt($password,
5622: $contentpwd) eq $contentpwd);
5623: }
5624: } else {
5625: $validated = 0;
5626: }
5627: }
5628: elsif ($howpwd eq "krb4") { # user is in kerberos 4 auth. domain.
5629: if(! ($password =~ /$null/) ) {
5630: my $k4error = &Authen::Krb4::get_pw_in_tkt($user,
5631: "",
5632: $contentpwd,,
5633: 'krbtgt',
5634: $contentpwd,
5635: 1,
5636: $password);
5637: if(!$k4error) {
5638: $validated = 1;
1.224 foxr 5639: } else {
1.220 foxr 5640: $validated = 0;
5641: &logthis('krb4: '.$user.', '.$contentpwd.', '.
5642: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
5643: }
1.224 foxr 5644: } else {
1.220 foxr 5645: $validated = 0; # Password has a match with null.
5646: }
1.224 foxr 5647: } elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain.
1.220 foxr 5648: if(!($password =~ /$null/)) { # Null password not allowed.
5649: my $krbclient = &Authen::Krb5::parse_name($user.'@'
5650: .$contentpwd);
5651: my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd;
5652: my $krbserver = &Authen::Krb5::parse_name($krbservice);
5653: my $credentials= &Authen::Krb5::cc_default();
5654: $credentials->initialize($krbclient);
1.270 matthew 5655: my $krbreturn = &Authen::Krb5::get_in_tkt_with_password($krbclient,
1.220 foxr 5656: $krbserver,
5657: $password,
5658: $credentials);
5659: $validated = ($krbreturn == 1);
1.224 foxr 5660: } else {
1.220 foxr 5661: $validated = 0;
5662: }
1.224 foxr 5663: } elsif ($howpwd eq "localauth") {
1.220 foxr 5664: # Authenticate via installation specific authentcation method:
5665: $validated = &localauth::localauth($user,
5666: $password,
5667: $contentpwd);
1.224 foxr 5668: } else { # Unrecognized auth is also bad.
1.220 foxr 5669: $validated = 0;
5670: }
5671: } else {
5672: $validated = 0;
5673: }
5674: #
5675: # $validated has the correct stat of the authentication:
5676: #
5677:
5678: unless ($validated != -3.14159) {
1.249 foxr 5679: # I >really really< want to know if this happens.
5680: # since it indicates that user authentication is badly
5681: # broken in some code path.
5682: #
5683: die "ValidateUser - failed to set the value of validated $domain, $user $password";
1.220 foxr 5684: }
5685: return $validated;
5686: }
5687:
5688:
1.84 albertel 5689: sub addline {
5690: my ($fname,$hostid,$ip,$newline)=@_;
5691: my $contents;
5692: my $found=0;
5693: my $expr='^'.$hostid.':'.$ip.':';
5694: $expr =~ s/\./\\\./g;
1.134 albertel 5695: my $sh;
1.84 albertel 5696: if ($sh=IO::File->new("$fname.subscription")) {
5697: while (my $subline=<$sh>) {
5698: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
5699: }
5700: $sh->close();
5701: }
5702: $sh=IO::File->new(">$fname.subscription");
5703: if ($contents) { print $sh $contents; }
5704: if ($newline) { print $sh $newline; }
5705: $sh->close();
5706: return $found;
1.86 www 5707: }
5708:
1.234 foxr 5709: sub get_chat {
1.324 raeburn 5710: my ($cdom,$cname,$udom,$uname,$group)=@_;
1.310 albertel 5711:
1.87 www 5712: my @entries=();
1.324 raeburn 5713: my $namespace = 'nohist_chatroom';
5714: my $namespace_inroom = 'nohist_inchatroom';
5715: if (defined($group)) {
5716: $namespace .= '_'.$group;
5717: $namespace_inroom .= '_'.$group;
5718: }
5719: my $hashref = &tie_user_hash($cdom, $cname, $namespace,
1.310 albertel 5720: &GDBM_READER());
5721: if ($hashref) {
5722: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
1.311 albertel 5723: &untie_user_hash($hashref);
1.123 www 5724: }
1.124 www 5725: my @participants=();
1.134 albertel 5726: my $cutoff=time-60;
1.324 raeburn 5727: $hashref = &tie_user_hash($cdom, $cname, $namespace_inroom,
1.310 albertel 5728: &GDBM_WRCREAT());
5729: if ($hashref) {
5730: $hashref->{$uname.':'.$udom}=time;
5731: foreach my $user (sort(keys(%$hashref))) {
5732: if ($hashref->{$user}>$cutoff) {
5733: push(@participants, 'active_participant:'.$user);
1.123 www 5734: }
5735: }
1.311 albertel 5736: &untie_user_hash($hashref);
1.86 www 5737: }
1.124 www 5738: return (@participants,@entries);
1.86 www 5739: }
5740:
1.234 foxr 5741: sub chat_add {
1.324 raeburn 5742: my ($cdom,$cname,$newchat,$group)=@_;
1.88 albertel 5743: my @entries=();
1.142 www 5744: my $time=time;
1.324 raeburn 5745: my $namespace = 'nohist_chatroom';
5746: my $logfile = 'chatroom.log';
5747: if (defined($group)) {
5748: $namespace .= '_'.$group;
5749: $logfile = 'chatroom_'.$group.'.log';
5750: }
5751: my $hashref = &tie_user_hash($cdom, $cname, $namespace,
1.310 albertel 5752: &GDBM_WRCREAT());
5753: if ($hashref) {
5754: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
1.88 albertel 5755: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
5756: my ($thentime,$idnum)=split(/\_/,$lastid);
5757: my $newid=$time.'_000000';
5758: if ($thentime==$time) {
5759: $idnum=~s/^0+//;
5760: $idnum++;
5761: $idnum=substr('000000'.$idnum,-6,6);
5762: $newid=$time.'_'.$idnum;
5763: }
1.310 albertel 5764: $hashref->{$newid}=$newchat;
1.88 albertel 5765: my $expired=$time-3600;
1.310 albertel 5766: foreach my $comment (keys(%$hashref)) {
5767: my ($thistime) = ($comment=~/(\d+)\_/);
1.88 albertel 5768: if ($thistime<$expired) {
1.310 albertel 5769: delete $hashref->{$comment};
1.88 albertel 5770: }
5771: }
1.310 albertel 5772: {
5773: my $proname=&propath($cdom,$cname);
1.324 raeburn 5774: if (open(CHATLOG,">>$proname/$logfile")) {
1.310 albertel 5775: print CHATLOG ("$time:".&unescape($newchat)."\n");
5776: }
5777: close(CHATLOG);
1.142 www 5778: }
1.311 albertel 5779: &untie_user_hash($hashref);
1.86 www 5780: }
1.84 albertel 5781: }
5782:
5783: sub unsub {
5784: my ($fname,$clientip)=@_;
5785: my $result;
1.188 foxr 5786: my $unsubs = 0; # Number of successful unsubscribes:
5787:
5788:
5789: # An old way subscriptions were handled was to have a
5790: # subscription marker file:
5791:
5792: Debug("Attempting unlink of $fname.$clientname");
1.161 foxr 5793: if (unlink("$fname.$clientname")) {
1.188 foxr 5794: $unsubs++; # Successful unsub via marker file.
5795: }
5796:
5797: # The more modern way to do it is to have a subscription list
5798: # file:
5799:
1.84 albertel 5800: if (-e "$fname.subscription") {
1.161 foxr 5801: my $found=&addline($fname,$clientname,$clientip,'');
1.188 foxr 5802: if ($found) {
5803: $unsubs++;
5804: }
5805: }
5806:
5807: # If either or both of these mechanisms succeeded in unsubscribing a
5808: # resource we can return ok:
5809:
5810: if($unsubs) {
5811: $result = "ok\n";
1.84 albertel 5812: } else {
1.188 foxr 5813: $result = "not_subscribed\n";
1.84 albertel 5814: }
1.188 foxr 5815:
1.84 albertel 5816: return $result;
5817: }
5818:
1.101 www 5819: sub currentversion {
5820: my $fname=shift;
5821: my $version=-1;
5822: my $ulsdir='';
5823: if ($fname=~/^(.+)\/[^\/]+$/) {
5824: $ulsdir=$1;
5825: }
1.114 albertel 5826: my ($fnamere1,$fnamere2);
5827: # remove version if already specified
1.101 www 5828: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
1.114 albertel 5829: # get the bits that go before and after the version number
5830: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
5831: $fnamere1=$1;
5832: $fnamere2='.'.$2;
5833: }
1.101 www 5834: if (-e $fname) { $version=1; }
5835: if (-e $ulsdir) {
1.134 albertel 5836: if(-d $ulsdir) {
5837: if (opendir(LSDIR,$ulsdir)) {
5838: my $ulsfn;
5839: while ($ulsfn=readdir(LSDIR)) {
1.101 www 5840: # see if this is a regular file (ignore links produced earlier)
1.134 albertel 5841: my $thisfile=$ulsdir.'/'.$ulsfn;
5842: unless (-l $thisfile) {
1.160 www 5843: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
1.134 albertel 5844: if ($1>$version) { $version=$1; }
5845: }
5846: }
5847: }
5848: closedir(LSDIR);
5849: $version++;
5850: }
5851: }
5852: }
5853: return $version;
1.101 www 5854: }
5855:
5856: sub thisversion {
5857: my $fname=shift;
5858: my $version=-1;
5859: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
5860: $version=$1;
5861: }
5862: return $version;
5863: }
5864:
1.84 albertel 5865: sub subscribe {
5866: my ($userinput,$clientip)=@_;
5867: my $result;
1.293 albertel 5868: my ($cmd,$fname)=split(/:/,$userinput,2);
1.84 albertel 5869: my $ownership=&ishome($fname);
5870: if ($ownership eq 'owner') {
1.101 www 5871: # explitly asking for the current version?
5872: unless (-e $fname) {
5873: my $currentversion=¤tversion($fname);
5874: if (&thisversion($fname)==$currentversion) {
5875: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
5876: my $root=$1;
5877: my $extension=$2;
5878: symlink($root.'.'.$extension,
5879: $root.'.'.$currentversion.'.'.$extension);
1.102 www 5880: unless ($extension=~/\.meta$/) {
5881: symlink($root.'.'.$extension.'.meta',
5882: $root.'.'.$currentversion.'.'.$extension.'.meta');
5883: }
1.101 www 5884: }
5885: }
5886: }
1.84 albertel 5887: if (-e $fname) {
5888: if (-d $fname) {
5889: $result="directory\n";
5890: } else {
1.161 foxr 5891: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
1.134 albertel 5892: my $now=time;
1.161 foxr 5893: my $found=&addline($fname,$clientname,$clientip,
5894: "$clientname:$clientip:$now\n");
1.84 albertel 5895: if ($found) { $result="$fname\n"; }
5896: # if they were subscribed to only meta data, delete that
5897: # subscription, when you subscribe to a file you also get
5898: # the metadata
5899: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
5900: $fname=~s/\/home\/httpd\/html\/res/raw/;
5901: $fname="http://$thisserver/".$fname;
5902: $result="$fname\n";
5903: }
5904: } else {
5905: $result="not_found\n";
5906: }
5907: } else {
5908: $result="rejected\n";
5909: }
5910: return $result;
5911: }
1.287 foxr 5912: # Change the passwd of a unix user. The caller must have
5913: # first verified that the user is a loncapa user.
5914: #
5915: # Parameters:
5916: # user - Unix user name to change.
5917: # pass - New password for the user.
5918: # Returns:
5919: # ok - if success
5920: # other - Some meaningfule error message string.
5921: # NOTE:
5922: # invokes a setuid script to change the passwd.
5923: sub change_unix_password {
5924: my ($user, $pass) = @_;
5925:
5926: &Debug("change_unix_password");
5927: my $execdir=$perlvar{'lonDaemons'};
5928: &Debug("Opening lcpasswd pipeline");
5929: my $pf = IO::File->new("|$execdir/lcpasswd > "
5930: ."$perlvar{'lonDaemons'}"
5931: ."/logs/lcpasswd.log");
5932: print $pf "$user\n$pass\n$pass\n";
5933: close $pf;
5934: my $err = $?;
5935: return ($err < @passwderrors) ? $passwderrors[$err] :
5936: "pwchange_falure - unknown error";
5937:
5938:
5939: }
5940:
1.91 albertel 5941:
5942: sub make_passwd_file {
1.98 foxr 5943: my ($uname, $umode,$npass,$passfilename)=@_;
1.91 albertel 5944: my $result="ok\n";
5945: if ($umode eq 'krb4' or $umode eq 'krb5') {
5946: {
5947: my $pf = IO::File->new(">$passfilename");
1.261 foxr 5948: if ($pf) {
5949: print $pf "$umode:$npass\n";
5950: } else {
5951: $result = "pass_file_failed_error";
5952: }
1.91 albertel 5953: }
5954: } elsif ($umode eq 'internal') {
5955: my $salt=time;
5956: $salt=substr($salt,6,2);
5957: my $ncpass=crypt($npass,$salt);
5958: {
5959: &Debug("Creating internal auth");
5960: my $pf = IO::File->new(">$passfilename");
1.261 foxr 5961: if($pf) {
5962: print $pf "internal:$ncpass\n";
5963: } else {
5964: $result = "pass_file_failed_error";
5965: }
1.91 albertel 5966: }
5967: } elsif ($umode eq 'localauth') {
5968: {
5969: my $pf = IO::File->new(">$passfilename");
1.261 foxr 5970: if($pf) {
5971: print $pf "localauth:$npass\n";
5972: } else {
5973: $result = "pass_file_failed_error";
5974: }
1.91 albertel 5975: }
5976: } elsif ($umode eq 'unix') {
5977: {
1.186 foxr 5978: #
5979: # Don't allow the creation of privileged accounts!!! that would
5980: # be real bad!!!
5981: #
5982: my $uid = getpwnam($uname);
5983: if((defined $uid) && ($uid == 0)) {
5984: &logthis(">>>Attempted to create privilged account blocked");
5985: return "no_priv_account_error\n";
5986: }
5987:
1.223 foxr 5988: my $execpath ="$perlvar{'lonDaemons'}/"."lcuseradd";
1.224 foxr 5989:
5990: my $lc_error_file = $execdir."/tmp/lcuseradd".$$.".status";
1.91 albertel 5991: {
5992: &Debug("Executing external: ".$execpath);
1.98 foxr 5993: &Debug("user = ".$uname.", Password =". $npass);
1.132 matthew 5994: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
1.91 albertel 5995: print $se "$uname\n";
5996: print $se "$npass\n";
5997: print $se "$npass\n";
1.223 foxr 5998: print $se "$lc_error_file\n"; # Status -> unique file.
1.97 foxr 5999: }
1.285 foxr 6000: if (-r $lc_error_file) {
6001: &Debug("Opening error file: $lc_error_file");
6002: my $error = IO::File->new("< $lc_error_file");
6003: my $useraddok = <$error>;
6004: $error->close;
6005: unlink($lc_error_file);
6006:
6007: chomp $useraddok;
6008:
6009: if($useraddok > 0) {
6010: my $error_text = &lcuseraddstrerror($useraddok);
6011: &logthis("Failed lcuseradd: $error_text");
6012: $result = "lcuseradd_failed:$error_text\n";
6013: } else {
6014: my $pf = IO::File->new(">$passfilename");
6015: if($pf) {
6016: print $pf "unix:\n";
6017: } else {
6018: $result = "pass_file_failed_error";
6019: }
6020: }
1.224 foxr 6021: } else {
1.285 foxr 6022: &Debug("Could not locate lcuseradd error: $lc_error_file");
6023: $result="bug_lcuseradd_no_output_file";
1.91 albertel 6024: }
6025: }
6026: } elsif ($umode eq 'none') {
6027: {
1.223 foxr 6028: my $pf = IO::File->new("> $passfilename");
1.261 foxr 6029: if($pf) {
6030: print $pf "none:\n";
6031: } else {
6032: $result = "pass_file_failed_error";
6033: }
1.91 albertel 6034: }
6035: } else {
6036: $result="auth_mode_error\n";
6037: }
6038: return $result;
1.121 albertel 6039: }
6040:
1.265 albertel 6041: sub convert_photo {
6042: my ($start,$dest)=@_;
6043: system("convert $start $dest");
6044: }
6045:
1.121 albertel 6046: sub sethost {
6047: my ($remotereq) = @_;
6048: my (undef,$hostid)=split(/:/,$remotereq);
1.322 albertel 6049: # ignore sethost if we are already correct
6050: if ($hostid eq $currenthostid) {
6051: return 'ok';
6052: }
6053:
1.121 albertel 6054: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
6055: if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
1.200 matthew 6056: $currenthostid =$hostid;
1.121 albertel 6057: $currentdomainid=$hostdom{$hostid};
6058: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
6059: } else {
6060: &logthis("Requested host id $hostid not an alias of ".
6061: $perlvar{'lonHostID'}." refusing connection");
6062: return 'unable_to_set';
6063: }
6064: return 'ok';
6065: }
6066:
6067: sub version {
6068: my ($userinput)=@_;
6069: $remoteVERSION=(split(/:/,$userinput))[1];
6070: return "version:$VERSION";
1.127 albertel 6071: }
1.178 foxr 6072:
1.128 albertel 6073: #There is a copy of this in lonnet.pm
1.127 albertel 6074: sub userload {
6075: my $numusers=0;
6076: {
6077: opendir(LONIDS,$perlvar{'lonIDsDir'});
6078: my $filename;
6079: my $curtime=time;
6080: while ($filename=readdir(LONIDS)) {
6081: if ($filename eq '.' || $filename eq '..') {next;}
1.138 albertel 6082: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
1.159 albertel 6083: if ($curtime-$mtime < 1800) { $numusers++; }
1.127 albertel 6084: }
6085: closedir(LONIDS);
6086: }
6087: my $userloadpercent=0;
6088: my $maxuserload=$perlvar{'lonUserLoadLim'};
6089: if ($maxuserload) {
1.129 albertel 6090: $userloadpercent=100*$numusers/$maxuserload;
1.127 albertel 6091: }
1.130 albertel 6092: $userloadpercent=sprintf("%.2f",$userloadpercent);
1.127 albertel 6093: return $userloadpercent;
1.91 albertel 6094: }
6095:
1.205 raeburn 6096: # Routines for serializing arrays and hashes (copies from lonnet)
6097:
6098: sub array2str {
6099: my (@array) = @_;
6100: my $result=&arrayref2str(\@array);
6101: $result=~s/^__ARRAY_REF__//;
6102: $result=~s/__END_ARRAY_REF__$//;
6103: return $result;
6104: }
6105:
6106: sub arrayref2str {
6107: my ($arrayref) = @_;
6108: my $result='__ARRAY_REF__';
6109: foreach my $elem (@$arrayref) {
6110: if(ref($elem) eq 'ARRAY') {
6111: $result.=&arrayref2str($elem).'&';
6112: } elsif(ref($elem) eq 'HASH') {
6113: $result.=&hashref2str($elem).'&';
6114: } elsif(ref($elem)) {
6115: #print("Got a ref of ".(ref($elem))." skipping.");
6116: } else {
6117: $result.=&escape($elem).'&';
6118: }
6119: }
6120: $result=~s/\&$//;
6121: $result .= '__END_ARRAY_REF__';
6122: return $result;
6123: }
6124:
6125: sub hash2str {
6126: my (%hash) = @_;
6127: my $result=&hashref2str(\%hash);
6128: $result=~s/^__HASH_REF__//;
6129: $result=~s/__END_HASH_REF__$//;
6130: return $result;
6131: }
6132:
6133: sub hashref2str {
6134: my ($hashref)=@_;
6135: my $result='__HASH_REF__';
6136: foreach (sort(keys(%$hashref))) {
6137: if (ref($_) eq 'ARRAY') {
6138: $result.=&arrayref2str($_).'=';
6139: } elsif (ref($_) eq 'HASH') {
6140: $result.=&hashref2str($_).'=';
6141: } elsif (ref($_)) {
6142: $result.='=';
6143: #print("Got a ref of ".(ref($_))." skipping.");
6144: } else {
6145: if ($_) {$result.=&escape($_).'=';} else { last; }
6146: }
6147:
6148: if(ref($hashref->{$_}) eq 'ARRAY') {
6149: $result.=&arrayref2str($hashref->{$_}).'&';
6150: } elsif(ref($hashref->{$_}) eq 'HASH') {
6151: $result.=&hashref2str($hashref->{$_}).'&';
6152: } elsif(ref($hashref->{$_})) {
6153: $result.='&';
6154: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
6155: } else {
6156: $result.=&escape($hashref->{$_}).'&';
6157: }
6158: }
6159: $result=~s/\&$//;
6160: $result .= '__END_HASH_REF__';
6161: return $result;
6162: }
1.200 matthew 6163:
1.61 harris41 6164: # ----------------------------------- POD (plain old documentation, CPAN style)
6165:
6166: =head1 NAME
6167:
6168: lond - "LON Daemon" Server (port "LOND" 5663)
6169:
6170: =head1 SYNOPSIS
6171:
1.74 harris41 6172: Usage: B<lond>
6173:
6174: Should only be run as user=www. This is a command-line script which
6175: is invoked by B<loncron>. There is no expectation that a typical user
6176: will manually start B<lond> from the command-line. (In other words,
6177: DO NOT START B<lond> YOURSELF.)
1.61 harris41 6178:
6179: =head1 DESCRIPTION
6180:
1.74 harris41 6181: There are two characteristics associated with the running of B<lond>,
6182: PROCESS MANAGEMENT (starting, stopping, handling child processes)
6183: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
6184: subscriptions, etc). These are described in two large
6185: sections below.
6186:
6187: B<PROCESS MANAGEMENT>
6188:
1.61 harris41 6189: Preforker - server who forks first. Runs as a daemon. HUPs.
6190: Uses IDEA encryption
6191:
1.74 harris41 6192: B<lond> forks off children processes that correspond to the other servers
6193: in the network. Management of these processes can be done at the
6194: parent process level or the child process level.
6195:
6196: B<logs/lond.log> is the location of log messages.
6197:
6198: The process management is now explained in terms of linux shell commands,
6199: subroutines internal to this code, and signal assignments:
6200:
6201: =over 4
6202:
6203: =item *
6204:
6205: PID is stored in B<logs/lond.pid>
6206:
6207: This is the process id number of the parent B<lond> process.
6208:
6209: =item *
6210:
6211: SIGTERM and SIGINT
6212:
6213: Parent signal assignment:
6214: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
6215:
6216: Child signal assignment:
6217: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
6218: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
6219: to restart a new child.)
6220:
6221: Command-line invocations:
6222: B<kill> B<-s> SIGTERM I<PID>
6223: B<kill> B<-s> SIGINT I<PID>
6224:
6225: Subroutine B<HUNTSMAN>:
6226: This is only invoked for the B<lond> parent I<PID>.
6227: This kills all the children, and then the parent.
6228: The B<lonc.pid> file is cleared.
6229:
6230: =item *
6231:
6232: SIGHUP
6233:
6234: Current bug:
6235: This signal can only be processed the first time
6236: on the parent process. Subsequent SIGHUP signals
6237: have no effect.
6238:
6239: Parent signal assignment:
6240: $SIG{HUP} = \&HUPSMAN;
6241:
6242: Child signal assignment:
6243: none (nothing happens)
6244:
6245: Command-line invocations:
6246: B<kill> B<-s> SIGHUP I<PID>
6247:
6248: Subroutine B<HUPSMAN>:
6249: This is only invoked for the B<lond> parent I<PID>,
6250: This kills all the children, and then the parent.
6251: The B<lond.pid> file is cleared.
6252:
6253: =item *
6254:
6255: SIGUSR1
6256:
6257: Parent signal assignment:
6258: $SIG{USR1} = \&USRMAN;
6259:
6260: Child signal assignment:
6261: $SIG{USR1}= \&logstatus;
6262:
6263: Command-line invocations:
6264: B<kill> B<-s> SIGUSR1 I<PID>
6265:
6266: Subroutine B<USRMAN>:
6267: When invoked for the B<lond> parent I<PID>,
6268: SIGUSR1 is sent to all the children, and the status of
6269: each connection is logged.
1.144 foxr 6270:
6271: =item *
6272:
6273: SIGUSR2
6274:
6275: Parent Signal assignment:
6276: $SIG{USR2} = \&UpdateHosts
6277:
6278: Child signal assignment:
6279: NONE
6280:
1.74 harris41 6281:
6282: =item *
6283:
6284: SIGCHLD
6285:
6286: Parent signal assignment:
6287: $SIG{CHLD} = \&REAPER;
6288:
6289: Child signal assignment:
6290: none
6291:
6292: Command-line invocations:
6293: B<kill> B<-s> SIGCHLD I<PID>
6294:
6295: Subroutine B<REAPER>:
6296: This is only invoked for the B<lond> parent I<PID>.
6297: Information pertaining to the child is removed.
6298: The socket port is cleaned up.
6299:
6300: =back
6301:
6302: B<SERVER-SIDE ACTIVITIES>
6303:
6304: Server-side information can be accepted in an encrypted or non-encrypted
6305: method.
6306:
6307: =over 4
6308:
6309: =item ping
6310:
6311: Query a client in the hosts.tab table; "Are you there?"
6312:
6313: =item pong
6314:
6315: Respond to a ping query.
6316:
6317: =item ekey
6318:
6319: Read in encrypted key, make cipher. Respond with a buildkey.
6320:
6321: =item load
6322:
6323: Respond with CPU load based on a computation upon /proc/loadavg.
6324:
6325: =item currentauth
6326:
6327: Reply with current authentication information (only over an
6328: encrypted channel).
6329:
6330: =item auth
6331:
6332: Only over an encrypted channel, reply as to whether a user's
6333: authentication information can be validated.
6334:
6335: =item passwd
6336:
6337: Allow for a password to be set.
6338:
6339: =item makeuser
6340:
6341: Make a user.
6342:
6343: =item passwd
6344:
6345: Allow for authentication mechanism and password to be changed.
6346:
6347: =item home
1.61 harris41 6348:
1.74 harris41 6349: Respond to a question "are you the home for a given user?"
6350:
6351: =item update
6352:
6353: Update contents of a subscribed resource.
6354:
6355: =item unsubscribe
6356:
6357: The server is unsubscribing from a resource.
6358:
6359: =item subscribe
6360:
6361: The server is subscribing to a resource.
6362:
6363: =item log
6364:
6365: Place in B<logs/lond.log>
6366:
6367: =item put
6368:
6369: stores hash in namespace
6370:
1.230 foxr 6371: =item rolesputy
1.74 harris41 6372:
6373: put a role into a user's environment
6374:
6375: =item get
6376:
6377: returns hash with keys from array
6378: reference filled in from namespace
6379:
6380: =item eget
6381:
6382: returns hash with keys from array
6383: reference filled in from namesp (encrypts the return communication)
6384:
6385: =item rolesget
6386:
6387: get a role from a user's environment
6388:
6389: =item del
6390:
6391: deletes keys out of array from namespace
6392:
6393: =item keys
6394:
6395: returns namespace keys
6396:
6397: =item dump
6398:
6399: dumps the complete (or key matching regexp) namespace into a hash
6400:
6401: =item store
6402:
6403: stores hash permanently
6404: for this url; hashref needs to be given and should be a \%hashname; the
6405: remaining args aren't required and if they aren't passed or are '' they will
6406: be derived from the ENV
6407:
6408: =item restore
6409:
6410: returns a hash for a given url
6411:
6412: =item querysend
6413:
6414: Tells client about the lonsql process that has been launched in response
6415: to a sent query.
6416:
6417: =item queryreply
6418:
6419: Accept information from lonsql and make appropriate storage in temporary
6420: file space.
6421:
6422: =item idput
6423:
6424: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
6425: for each student, defined perhaps by the institutional Registrar.)
6426:
6427: =item idget
6428:
6429: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
6430: for each student, defined perhaps by the institutional Registrar.)
6431:
6432: =item tmpput
6433:
6434: Accept and store information in temporary space.
6435:
6436: =item tmpget
6437:
6438: Send along temporarily stored information.
6439:
6440: =item ls
6441:
6442: List part of a user's directory.
6443:
1.135 foxr 6444: =item pushtable
6445:
6446: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
6447: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
6448: must be restored manually in case of a problem with the new table file.
6449: pushtable requires that the request be encrypted and validated via
6450: ValidateManager. The form of the command is:
6451: enc:pushtable tablename <tablecontents> \n
6452: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
6453: cleartext newline.
6454:
1.74 harris41 6455: =item Hanging up (exit or init)
6456:
6457: What to do when a client tells the server that they (the client)
6458: are leaving the network.
6459:
6460: =item unknown command
6461:
6462: If B<lond> is sent an unknown command (not in the list above),
6463: it replys to the client "unknown_cmd".
1.135 foxr 6464:
1.74 harris41 6465:
6466: =item UNKNOWN CLIENT
6467:
6468: If the anti-spoofing algorithm cannot verify the client,
6469: the client is rejected (with a "refused" message sent
6470: to the client, and the connection is closed.
6471:
6472: =back
1.61 harris41 6473:
6474: =head1 PREREQUISITES
6475:
6476: IO::Socket
6477: IO::File
6478: Apache::File
6479: POSIX
6480: Crypt::IDEA
6481: LWP::UserAgent()
6482: GDBM_File
6483: Authen::Krb4
1.91 albertel 6484: Authen::Krb5
1.61 harris41 6485:
6486: =head1 COREQUISITES
6487:
6488: =head1 OSNAMES
6489:
6490: linux
6491:
6492: =head1 SCRIPT CATEGORIES
6493:
6494: Server/Process
6495:
6496: =cut
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