Annotation of loncom/lond, revision 1.343
1.1 albertel 1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
1.60 www 4: #
1.343 ! albertel 5: # $Id: lond,v 1.342 2006/09/05 15:35:14 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:
1.343 ! albertel 62: my $VERSION='$Revision: 1.342 $'; #' 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: #
1.338 albertel 838: my ($id,$domain,$role,$name,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);
1.169 foxr 839: #
840: # Reassemble the config line from the elements in the list.
841: # Note that if the loncnew items were not present before, they will
842: # be now even if they would be empty
843: #
844: my $newConfigLine = $id;
1.338 albertel 845: foreach my $item ($domain, $role, $name, $maxcon, $idleto, $mincon) {
1.169 foxr 846: $newConfigLine .= ":".$item;
847: }
848: # Replace the line:
849:
850: $editor->ReplaceLine($id, $newConfigLine);
851:
852: }
853: #
854: # ReplaceConfigFile:
855: # Replaces a configuration file with the contents of a
856: # configuration file editor object.
857: # This is done by:
858: # - Copying the target file to <filename>.old
859: # - Writing the new file to <filename>.tmp
860: # - Moving <filename.tmp> -> <filename>
861: # This laborious process ensures that the system is never without
862: # a configuration file that's at least valid (even if the contents
863: # may be dated).
864: # Parameters:
865: # filename - Name of the file to modify... this is a full path.
866: # editor - Editor containing the file.
867: #
868: sub ReplaceConfigFile {
1.192 foxr 869:
870: my ($filename, $editor) = @_;
1.168 foxr 871:
1.169 foxr 872: CopyFile ($filename, $filename.".old");
873:
874: my $contents = $editor->Get(); # Get the contents of the file.
875:
876: InstallFile($filename, $contents);
877: }
1.168 foxr 878: #
879: #
880: # Called to edit a configuration table file
1.167 foxr 881: # Parameters:
882: # request - The entire command/request sent by lonc or lonManage
883: # Return:
884: # The reply to send to the client.
1.168 foxr 885: #
1.167 foxr 886: sub EditFile {
887: my $request = shift;
888:
889: # Split the command into it's pieces: edit:filetype:script
890:
1.339 albertel 891: my ($cmd, $filetype, $script) = split(/:/, $request,3); # : in script
1.167 foxr 892:
893: # Check the pre-coditions for success:
894:
1.339 albertel 895: if($cmd != "edit") { # Something is amiss afoot alack.
1.167 foxr 896: return "error:edit request detected, but request != 'edit'\n";
897: }
898: if( ($filetype ne "hosts") &&
899: ($filetype ne "domain")) {
900: return "error:edit requested with invalid file specifier: $filetype \n";
901: }
902:
903: # Split the edit script and check it's validity.
1.168 foxr 904:
905: my @scriptlines = split(/\n/, $script); # one line per element.
906: my $linecount = scalar(@scriptlines);
907: for(my $i = 0; $i < $linecount; $i++) {
908: chomp($scriptlines[$i]);
909: if(!isValidEditCommand($scriptlines[$i])) {
910: return "error:edit with bad script line: '$scriptlines[$i]' \n";
911: }
912: }
1.145 foxr 913:
1.167 foxr 914: # Execute the edit operation.
1.169 foxr 915: # - Create a config file editor for the appropriate file and
916: # - execute each command in the script:
917: #
918: my $configfile = ConfigFileFromSelector($filetype);
919: if (!(defined $configfile)) {
920: return "refused\n";
921: }
922: my $editor = ConfigFileEdit->new($configfile);
1.167 foxr 923:
1.169 foxr 924: for (my $i = 0; $i < $linecount; $i++) {
925: ApplyEdit($scriptlines[$i], $editor);
926: }
927: # If the file is the host file, ensure that our host is
928: # adjusted to have our ip:
929: #
930: if($filetype eq "host") {
931: AdjustOurHost($editor);
932: }
933: # Finally replace the current file with our file.
934: #
935: ReplaceConfigFile($configfile, $editor);
1.167 foxr 936:
937: return "ok\n";
938: }
1.207 foxr 939:
1.255 foxr 940: # read_profile
941: #
942: # Returns a set of specific entries from a user's profile file.
943: # this is a utility function that is used by both get_profile_entry and
944: # get_profile_entry_encrypted.
945: #
946: # Parameters:
947: # udom - Domain in which the user exists.
948: # uname - User's account name (loncapa account)
949: # namespace - The profile namespace to open.
950: # what - A set of & separated queries.
951: # Returns:
952: # If all ok: - The string that needs to be shipped back to the user.
953: # If failure - A string that starts with error: followed by the failure
954: # reason.. note that this probabyl gets shipped back to the
955: # user as well.
956: #
957: sub read_profile {
958: my ($udom, $uname, $namespace, $what) = @_;
959:
960: my $hashref = &tie_user_hash($udom, $uname, $namespace,
961: &GDBM_READER());
962: if ($hashref) {
963: my @queries=split(/\&/,$what);
964: my $qresult='';
965:
966: for (my $i=0;$i<=$#queries;$i++) {
967: $qresult.="$hashref->{$queries[$i]}&"; # Presumably failure gives empty string.
968: }
969: $qresult=~s/\&$//; # Remove trailing & from last lookup.
1.311 albertel 970: if (&untie_user_hash($hashref)) {
1.255 foxr 971: return $qresult;
972: } else {
973: return "error: ".($!+0)." untie (GDBM) Failed";
974: }
975: } else {
976: if ($!+0 == 2) {
977: return "error:No such file or GDBM reported bad block error";
978: } else {
979: return "error: ".($!+0)." tie (GDBM) Failed";
980: }
981: }
982:
983: }
1.214 foxr 984: #--------------------- Request Handlers --------------------------------------------
985: #
1.215 foxr 986: # By convention each request handler registers itself prior to the sub
987: # declaration:
1.214 foxr 988: #
989:
1.216 foxr 990: #++
991: #
1.214 foxr 992: # Handles ping requests.
993: # Parameters:
994: # $cmd - the actual keyword that invoked us.
995: # $tail - the tail of the request that invoked us.
996: # $replyfd- File descriptor connected to the client
997: # Implicit Inputs:
998: # $currenthostid - Global variable that carries the name of the host we are
999: # known as.
1000: # Returns:
1001: # 1 - Ok to continue processing.
1002: # 0 - Program should exit.
1003: # Side effects:
1004: # Reply information is sent to the client.
1005: sub ping_handler {
1006: my ($cmd, $tail, $client) = @_;
1007: Debug("$cmd $tail $client .. $currenthostid:");
1008:
1009: Reply( $client,"$currenthostid\n","$cmd:$tail");
1010:
1011: return 1;
1012: }
1013: ®ister_handler("ping", \&ping_handler, 0, 1, 1); # Ping unencoded, client or manager.
1014:
1.216 foxr 1015: #++
1.215 foxr 1016: #
1017: # Handles pong requests. Pong replies with our current host id, and
1018: # the results of a ping sent to us via our lonc.
1019: #
1020: # Parameters:
1021: # $cmd - the actual keyword that invoked us.
1022: # $tail - the tail of the request that invoked us.
1023: # $replyfd- File descriptor connected to the client
1024: # Implicit Inputs:
1025: # $currenthostid - Global variable that carries the name of the host we are
1026: # connected to.
1027: # Returns:
1028: # 1 - Ok to continue processing.
1029: # 0 - Program should exit.
1030: # Side effects:
1031: # Reply information is sent to the client.
1032: sub pong_handler {
1033: my ($cmd, $tail, $replyfd) = @_;
1034:
1035: my $reply=&reply("ping",$clientname);
1036: &Reply( $replyfd, "$currenthostid:$reply\n", "$cmd:$tail");
1037: return 1;
1038: }
1039: ®ister_handler("pong", \&pong_handler, 0, 1, 1); # Pong unencoded, client or manager
1040:
1.216 foxr 1041: #++
1042: # Called to establish an encrypted session key with the remote client.
1043: # Note that with secure lond, in most cases this function is never
1044: # invoked. Instead, the secure session key is established either
1045: # via a local file that's locked down tight and only lives for a short
1046: # time, or via an ssl tunnel...and is generated from a bunch-o-random
1047: # bits from /dev/urandom, rather than the predictable pattern used by
1048: # by this sub. This sub is only used in the old-style insecure
1049: # key negotiation.
1050: # Parameters:
1051: # $cmd - the actual keyword that invoked us.
1052: # $tail - the tail of the request that invoked us.
1053: # $replyfd- File descriptor connected to the client
1054: # Implicit Inputs:
1055: # $currenthostid - Global variable that carries the name of the host
1056: # known as.
1057: # $clientname - Global variable that carries the name of the hsot we're connected to.
1058: # Returns:
1059: # 1 - Ok to continue processing.
1060: # 0 - Program should exit.
1061: # Implicit Outputs:
1062: # Reply information is sent to the client.
1063: # $cipher is set with a reference to a new IDEA encryption object.
1064: #
1065: sub establish_key_handler {
1066: my ($cmd, $tail, $replyfd) = @_;
1067:
1068: my $buildkey=time.$$.int(rand 100000);
1069: $buildkey=~tr/1-6/A-F/;
1070: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
1071: my $key=$currenthostid.$clientname;
1072: $key=~tr/a-z/A-Z/;
1073: $key=~tr/G-P/0-9/;
1074: $key=~tr/Q-Z/0-9/;
1075: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
1076: $key=substr($key,0,32);
1077: my $cipherkey=pack("H32",$key);
1078: $cipher=new IDEA $cipherkey;
1079: &Reply($replyfd, "$buildkey\n", "$cmd:$tail");
1080:
1081: return 1;
1082:
1083: }
1084: ®ister_handler("ekey", \&establish_key_handler, 0, 1,1);
1085:
1.217 foxr 1086: # Handler for the load command. Returns the current system load average
1087: # to the requestor.
1088: #
1089: # Parameters:
1090: # $cmd - the actual keyword that invoked us.
1091: # $tail - the tail of the request that invoked us.
1092: # $replyfd- File descriptor connected to the client
1093: # Implicit Inputs:
1094: # $currenthostid - Global variable that carries the name of the host
1095: # known as.
1096: # $clientname - Global variable that carries the name of the hsot we're connected to.
1097: # Returns:
1098: # 1 - Ok to continue processing.
1099: # 0 - Program should exit.
1100: # Side effects:
1101: # Reply information is sent to the client.
1102: sub load_handler {
1103: my ($cmd, $tail, $replyfd) = @_;
1104:
1105: # Get the load average from /proc/loadavg and calculate it as a percentage of
1106: # the allowed load limit as set by the perl global variable lonLoadLim
1107:
1108: my $loadavg;
1109: my $loadfile=IO::File->new('/proc/loadavg');
1110:
1111: $loadavg=<$loadfile>;
1112: $loadavg =~ s/\s.*//g; # Extract the first field only.
1113:
1114: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1115:
1116: &Reply( $replyfd, "$loadpercent\n", "$cmd:$tail");
1117:
1118: return 1;
1119: }
1.263 albertel 1120: ®ister_handler("load", \&load_handler, 0, 1, 0);
1.217 foxr 1121:
1122: #
1123: # Process the userload request. This sub returns to the client the current
1124: # user load average. It can be invoked either by clients or managers.
1125: #
1126: # Parameters:
1127: # $cmd - the actual keyword that invoked us.
1128: # $tail - the tail of the request that invoked us.
1129: # $replyfd- File descriptor connected to the client
1130: # Implicit Inputs:
1131: # $currenthostid - Global variable that carries the name of the host
1132: # known as.
1133: # $clientname - Global variable that carries the name of the hsot we're connected to.
1134: # Returns:
1135: # 1 - Ok to continue processing.
1136: # 0 - Program should exit
1137: # Implicit inputs:
1138: # whatever the userload() function requires.
1139: # Implicit outputs:
1140: # the reply is written to the client.
1141: #
1142: sub user_load_handler {
1143: my ($cmd, $tail, $replyfd) = @_;
1144:
1145: my $userloadpercent=&userload();
1146: &Reply($replyfd, "$userloadpercent\n", "$cmd:$tail");
1147:
1148: return 1;
1149: }
1.263 albertel 1150: ®ister_handler("userload", \&user_load_handler, 0, 1, 0);
1.217 foxr 1151:
1.218 foxr 1152: # Process a request for the authorization type of a user:
1153: # (userauth).
1154: #
1155: # Parameters:
1156: # $cmd - the actual keyword that invoked us.
1157: # $tail - the tail of the request that invoked us.
1158: # $replyfd- File descriptor connected to the client
1159: # Returns:
1160: # 1 - Ok to continue processing.
1161: # 0 - Program should exit
1162: # Implicit outputs:
1163: # The user authorization type is written to the client.
1164: #
1165: sub user_authorization_type {
1166: my ($cmd, $tail, $replyfd) = @_;
1167:
1168: my $userinput = "$cmd:$tail";
1169:
1170: # Pull the domain and username out of the command tail.
1.222 foxr 1171: # and call get_auth_type to determine the authentication type.
1.218 foxr 1172:
1173: my ($udom,$uname)=split(/:/,$tail);
1.222 foxr 1174: my $result = &get_auth_type($udom, $uname);
1.218 foxr 1175: if($result eq "nouser") {
1176: &Failure( $replyfd, "unknown_user\n", $userinput);
1177: } else {
1178: #
1.222 foxr 1179: # We only want to pass the second field from get_auth_type
1.218 foxr 1180: # for ^krb.. otherwise we'll be handing out the encrypted
1181: # password for internals e.g.
1182: #
1183: my ($type,$otherinfo) = split(/:/,$result);
1184: if($type =~ /^krb/) {
1185: $type = $result;
1.269 raeburn 1186: } else {
1187: $type .= ':';
1188: }
1189: &Reply( $replyfd, "$type\n", $userinput);
1.218 foxr 1190: }
1191:
1192: return 1;
1193: }
1194: ®ister_handler("currentauth", \&user_authorization_type, 1, 1, 0);
1195:
1196: # Process a request by a manager to push a hosts or domain table
1197: # to us. We pick apart the command and pass it on to the subs
1198: # that already exist to do this.
1199: #
1200: # Parameters:
1201: # $cmd - the actual keyword that invoked us.
1202: # $tail - the tail of the request that invoked us.
1203: # $client - File descriptor connected to the client
1204: # Returns:
1205: # 1 - Ok to continue processing.
1206: # 0 - Program should exit
1207: # Implicit Output:
1208: # a reply is written to the client.
1209: sub push_file_handler {
1210: my ($cmd, $tail, $client) = @_;
1211:
1212: my $userinput = "$cmd:$tail";
1213:
1214: # At this time we only know that the IP of our partner is a valid manager
1215: # the code below is a hook to do further authentication (e.g. to resolve
1216: # spoofing).
1217:
1218: my $cert = &GetCertificate($userinput);
1219: if(&ValidManager($cert)) {
1220:
1221: # Now presumably we have the bona fides of both the peer host and the
1222: # process making the request.
1223:
1224: my $reply = &PushFile($userinput);
1225: &Reply($client, "$reply\n", $userinput);
1226:
1227: } else {
1228: &Failure( $client, "refused\n", $userinput);
1229: }
1.219 foxr 1230: return 1;
1.218 foxr 1231: }
1232: ®ister_handler("pushfile", \&push_file_handler, 1, 0, 1);
1233:
1.243 banghart 1234: #
1235: # du - list the disk usuage of a directory recursively.
1236: #
1237: # note: stolen code from the ls file handler
1238: # under construction by Rick Banghart
1239: # .
1240: # Parameters:
1241: # $cmd - The command that dispatched us (du).
1242: # $ududir - The directory path to list... I'm not sure what this
1243: # is relative as things like ls:. return e.g.
1244: # no_such_dir.
1245: # $client - Socket open on the client.
1246: # Returns:
1247: # 1 - indicating that the daemon should not disconnect.
1248: # Side Effects:
1249: # The reply is written to $client.
1250: #
1251: sub du_handler {
1252: my ($cmd, $ududir, $client) = @_;
1.339 albertel 1253: ($ududir) = split(/:/,$ududir); # Make 'telnet' testing easier.
1.251 foxr 1254: my $userinput = "$cmd:$ududir";
1255:
1.245 albertel 1256: if ($ududir=~/\.\./ || $ududir!~m|^/home/httpd/|) {
1257: &Failure($client,"refused\n","$cmd:$ududir");
1258: return 1;
1259: }
1.249 foxr 1260: # Since $ududir could have some nasties in it,
1261: # we will require that ududir is a valid
1262: # directory. Just in case someone tries to
1263: # slip us a line like .;(cd /home/httpd rm -rf*)
1264: # etc.
1265: #
1266: if (-d $ududir) {
1.292 albertel 1267: my $total_size=0;
1268: my $code=sub {
1269: if ($_=~/\.\d+\./) { return;}
1270: if ($_=~/\.meta$/) { return;}
1271: $total_size+=(stat($_))[7];
1272: };
1.295 raeburn 1273: chdir($ududir);
1.292 albertel 1274: find($code,$ududir);
1275: $total_size=int($total_size/1024);
1276: &Reply($client,"$total_size\n","$cmd:$ududir");
1.249 foxr 1277: } else {
1.251 foxr 1278: &Failure($client, "bad_directory:$ududir\n","$cmd:$ududir");
1.249 foxr 1279: }
1.243 banghart 1280: return 1;
1281: }
1282: ®ister_handler("du", \&du_handler, 0, 1, 0);
1.218 foxr 1283:
1.239 foxr 1284: #
1.280 matthew 1285: # The ls_handler routine should be considered obosolete and is retained
1286: # for communication with legacy servers. Please see the ls2_handler.
1287: #
1.239 foxr 1288: # ls - list the contents of a directory. For each file in the
1289: # selected directory the filename followed by the full output of
1290: # the stat function is returned. The returned info for each
1291: # file are separated by ':'. The stat fields are separated by &'s.
1292: # Parameters:
1293: # $cmd - The command that dispatched us (ls).
1294: # $ulsdir - The directory path to list... I'm not sure what this
1295: # is relative as things like ls:. return e.g.
1296: # no_such_dir.
1297: # $client - Socket open on the client.
1298: # Returns:
1299: # 1 - indicating that the daemon should not disconnect.
1300: # Side Effects:
1301: # The reply is written to $client.
1302: #
1303: sub ls_handler {
1.280 matthew 1304: # obsoleted by ls2_handler
1.239 foxr 1305: my ($cmd, $ulsdir, $client) = @_;
1306:
1307: my $userinput = "$cmd:$ulsdir";
1308:
1309: my $obs;
1310: my $rights;
1311: my $ulsout='';
1312: my $ulsfn;
1313: if (-e $ulsdir) {
1314: if(-d $ulsdir) {
1315: if (opendir(LSDIR,$ulsdir)) {
1316: while ($ulsfn=readdir(LSDIR)) {
1.291 albertel 1317: undef($obs);
1318: undef($rights);
1.239 foxr 1319: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1320: #We do some obsolete checking here
1321: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1322: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1323: my @obsolete=<FILE>;
1324: foreach my $obsolete (@obsolete) {
1.301 www 1325: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1.239 foxr 1326: if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
1327: }
1328: }
1329: $ulsout.=$ulsfn.'&'.join('&',@ulsstats);
1330: if($obs eq '1') { $ulsout.="&1"; }
1331: else { $ulsout.="&0"; }
1332: if($rights eq '1') { $ulsout.="&1:"; }
1333: else { $ulsout.="&0:"; }
1334: }
1335: closedir(LSDIR);
1336: }
1337: } else {
1338: my @ulsstats=stat($ulsdir);
1339: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1340: }
1341: } else {
1342: $ulsout='no_such_dir';
1343: }
1344: if ($ulsout eq '') { $ulsout='empty'; }
1.249 foxr 1345: &Reply($client, "$ulsout\n", $userinput); # This supports debug logging.
1.239 foxr 1346:
1347: return 1;
1348:
1349: }
1350: ®ister_handler("ls", \&ls_handler, 0, 1, 0);
1351:
1.280 matthew 1352: #
1353: # Please also see the ls_handler, which this routine obosolets.
1354: # ls2_handler differs from ls_handler in that it escapes its return
1355: # values before concatenating them together with ':'s.
1356: #
1357: # ls2 - list the contents of a directory. For each file in the
1358: # selected directory the filename followed by the full output of
1359: # the stat function is returned. The returned info for each
1360: # file are separated by ':'. The stat fields are separated by &'s.
1361: # Parameters:
1362: # $cmd - The command that dispatched us (ls).
1363: # $ulsdir - The directory path to list... I'm not sure what this
1364: # is relative as things like ls:. return e.g.
1365: # no_such_dir.
1366: # $client - Socket open on the client.
1367: # Returns:
1368: # 1 - indicating that the daemon should not disconnect.
1369: # Side Effects:
1370: # The reply is written to $client.
1371: #
1372: sub ls2_handler {
1373: my ($cmd, $ulsdir, $client) = @_;
1374:
1375: my $userinput = "$cmd:$ulsdir";
1376:
1377: my $obs;
1378: my $rights;
1379: my $ulsout='';
1380: my $ulsfn;
1381: if (-e $ulsdir) {
1382: if(-d $ulsdir) {
1383: if (opendir(LSDIR,$ulsdir)) {
1384: while ($ulsfn=readdir(LSDIR)) {
1.291 albertel 1385: undef($obs);
1386: undef($rights);
1.280 matthew 1387: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1388: #We do some obsolete checking here
1389: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1390: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1391: my @obsolete=<FILE>;
1392: foreach my $obsolete (@obsolete) {
1.301 www 1393: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1.280 matthew 1394: if($obsolete =~ m|(<copyright>)(default)|) {
1395: $rights = 1;
1396: }
1397: }
1398: }
1399: my $tmp = $ulsfn.'&'.join('&',@ulsstats);
1400: if ($obs eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1401: if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1402: $ulsout.= &escape($tmp).':';
1403: }
1404: closedir(LSDIR);
1405: }
1406: } else {
1407: my @ulsstats=stat($ulsdir);
1408: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1409: }
1410: } else {
1411: $ulsout='no_such_dir';
1412: }
1413: if ($ulsout eq '') { $ulsout='empty'; }
1414: &Reply($client, "$ulsout\n", $userinput); # This supports debug logging.
1415: return 1;
1416: }
1417: ®ister_handler("ls2", \&ls2_handler, 0, 1, 0);
1418:
1.218 foxr 1419: # Process a reinit request. Reinit requests that either
1420: # lonc or lond be reinitialized so that an updated
1421: # host.tab or domain.tab can be processed.
1422: #
1423: # Parameters:
1424: # $cmd - the actual keyword that invoked us.
1425: # $tail - the tail of the request that invoked us.
1426: # $client - File descriptor connected to the client
1427: # Returns:
1428: # 1 - Ok to continue processing.
1429: # 0 - Program should exit
1430: # Implicit output:
1431: # a reply is sent to the client.
1432: #
1433: sub reinit_process_handler {
1434: my ($cmd, $tail, $client) = @_;
1435:
1436: my $userinput = "$cmd:$tail";
1437:
1438: my $cert = &GetCertificate($userinput);
1439: if(&ValidManager($cert)) {
1440: chomp($userinput);
1441: my $reply = &ReinitProcess($userinput);
1442: &Reply( $client, "$reply\n", $userinput);
1443: } else {
1444: &Failure( $client, "refused\n", $userinput);
1445: }
1446: return 1;
1447: }
1448: ®ister_handler("reinit", \&reinit_process_handler, 1, 0, 1);
1449:
1450: # Process the editing script for a table edit operation.
1451: # the editing operation must be encrypted and requested by
1452: # a manager host.
1453: #
1454: # Parameters:
1455: # $cmd - the actual keyword that invoked us.
1456: # $tail - the tail of the request that invoked us.
1457: # $client - File descriptor connected to the client
1458: # Returns:
1459: # 1 - Ok to continue processing.
1460: # 0 - Program should exit
1461: # Implicit output:
1462: # a reply is sent to the client.
1463: #
1464: sub edit_table_handler {
1465: my ($command, $tail, $client) = @_;
1466:
1467: my $userinput = "$command:$tail";
1468:
1469: my $cert = &GetCertificate($userinput);
1470: if(&ValidManager($cert)) {
1471: my($filetype, $script) = split(/:/, $tail);
1472: if (($filetype eq "hosts") ||
1473: ($filetype eq "domain")) {
1474: if($script ne "") {
1475: &Reply($client, # BUGBUG - EditFile
1476: &EditFile($userinput), # could fail.
1477: $userinput);
1478: } else {
1479: &Failure($client,"refused\n",$userinput);
1480: }
1481: } else {
1482: &Failure($client,"refused\n",$userinput);
1483: }
1484: } else {
1485: &Failure($client,"refused\n",$userinput);
1486: }
1487: return 1;
1488: }
1.263 albertel 1489: ®ister_handler("edit", \&edit_table_handler, 1, 0, 1);
1.218 foxr 1490:
1.220 foxr 1491: #
1492: # Authenticate a user against the LonCAPA authentication
1493: # database. Note that there are several authentication
1494: # possibilities:
1495: # - unix - The user can be authenticated against the unix
1496: # password file.
1497: # - internal - The user can be authenticated against a purely
1498: # internal per user password file.
1499: # - kerberos - The user can be authenticated against either a kerb4 or kerb5
1500: # ticket granting authority.
1501: # - user - The person tailoring LonCAPA can supply a user authentication
1502: # mechanism that is per system.
1503: #
1504: # Parameters:
1505: # $cmd - The command that got us here.
1506: # $tail - Tail of the command (remaining parameters).
1507: # $client - File descriptor connected to client.
1508: # Returns
1509: # 0 - Requested to exit, caller should shut down.
1510: # 1 - Continue processing.
1511: # Implicit inputs:
1512: # The authentication systems describe above have their own forms of implicit
1513: # input into the authentication process that are described above.
1514: #
1515: sub authenticate_handler {
1516: my ($cmd, $tail, $client) = @_;
1517:
1518:
1519: # Regenerate the full input line
1520:
1521: my $userinput = $cmd.":".$tail;
1522:
1523: # udom - User's domain.
1524: # uname - Username.
1525: # upass - User's password.
1526:
1527: my ($udom,$uname,$upass)=split(/:/,$tail);
1528: &Debug(" Authenticate domain = $udom, user = $uname, password = $upass");
1529: chomp($upass);
1530: $upass=&unescape($upass);
1531:
1532: my $pwdcorrect = &validate_user($udom, $uname, $upass);
1533: if($pwdcorrect) {
1534: &Reply( $client, "authorized\n", $userinput);
1535: #
1536: # Bad credentials: Failed to authorize
1537: #
1538: } else {
1539: &Failure( $client, "non_authorized\n", $userinput);
1540: }
1541:
1542: return 1;
1543: }
1.263 albertel 1544: ®ister_handler("auth", \&authenticate_handler, 1, 1, 0);
1.214 foxr 1545:
1.222 foxr 1546: #
1547: # Change a user's password. Note that this function is complicated by
1548: # the fact that a user may be authenticated in more than one way:
1549: # At present, we are not able to change the password for all types of
1550: # authentication methods. Only for:
1551: # unix - unix password or shadow passoword style authentication.
1552: # local - Locally written authentication mechanism.
1553: # For now, kerb4 and kerb5 password changes are not supported and result
1554: # in an error.
1555: # FUTURE WORK:
1556: # Support kerberos passwd changes?
1557: # Parameters:
1558: # $cmd - The command that got us here.
1559: # $tail - Tail of the command (remaining parameters).
1560: # $client - File descriptor connected to client.
1561: # Returns
1562: # 0 - Requested to exit, caller should shut down.
1563: # 1 - Continue processing.
1564: # Implicit inputs:
1565: # The authentication systems describe above have their own forms of implicit
1566: # input into the authentication process that are described above.
1567: sub change_password_handler {
1568: my ($cmd, $tail, $client) = @_;
1569:
1570: my $userinput = $cmd.":".$tail; # Reconstruct client's string.
1571:
1572: #
1573: # udom - user's domain.
1574: # uname - Username.
1575: # upass - Current password.
1576: # npass - New password.
1577:
1578: my ($udom,$uname,$upass,$npass)=split(/:/,$tail);
1579:
1580: $upass=&unescape($upass);
1581: $npass=&unescape($npass);
1582: &Debug("Trying to change password for $uname");
1583:
1584: # First require that the user can be authenticated with their
1585: # old password:
1586:
1587: my $validated = &validate_user($udom, $uname, $upass);
1588: if($validated) {
1589: my $realpasswd = &get_auth_type($udom, $uname); # Defined since authd.
1590:
1591: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1592: if ($howpwd eq 'internal') {
1593: &Debug("internal auth");
1594: my $salt=time;
1595: $salt=substr($salt,6,2);
1596: my $ncpass=crypt($npass,$salt);
1597: if(&rewrite_password_file($udom, $uname, "internal:$ncpass")) {
1598: &logthis("Result of password change for "
1599: ."$uname: pwchange_success");
1600: &Reply($client, "ok\n", $userinput);
1601: } else {
1602: &logthis("Unable to open $uname passwd "
1603: ."to change password");
1604: &Failure( $client, "non_authorized\n",$userinput);
1605: }
1606: } elsif ($howpwd eq 'unix') {
1.287 foxr 1607: my $result = &change_unix_password($uname, $npass);
1.222 foxr 1608: &logthis("Result of password change for $uname: ".
1.287 foxr 1609: $result);
1.222 foxr 1610: &Reply($client, "$result\n", $userinput);
1611: } else {
1612: # this just means that the current password mode is not
1613: # one we know how to change (e.g the kerberos auth modes or
1614: # locally written auth handler).
1615: #
1616: &Failure( $client, "auth_mode_error\n", $userinput);
1617: }
1618:
1.224 foxr 1619: } else {
1.222 foxr 1620: &Failure( $client, "non_authorized\n", $userinput);
1621: }
1622:
1623: return 1;
1624: }
1.263 albertel 1625: ®ister_handler("passwd", \&change_password_handler, 1, 1, 0);
1.222 foxr 1626:
1.225 foxr 1627: #
1628: # Create a new user. User in this case means a lon-capa user.
1629: # The user must either already exist in some authentication realm
1630: # like kerberos or the /etc/passwd. If not, a user completely local to
1631: # this loncapa system is created.
1632: #
1633: # Parameters:
1634: # $cmd - The command that got us here.
1635: # $tail - Tail of the command (remaining parameters).
1636: # $client - File descriptor connected to client.
1637: # Returns
1638: # 0 - Requested to exit, caller should shut down.
1639: # 1 - Continue processing.
1640: # Implicit inputs:
1641: # The authentication systems describe above have their own forms of implicit
1642: # input into the authentication process that are described above.
1643: sub add_user_handler {
1644:
1645: my ($cmd, $tail, $client) = @_;
1646:
1647:
1648: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
1649: my $userinput = $cmd.":".$tail; # Reconstruct the full request line.
1650:
1651: &Debug("cmd =".$cmd." $udom =".$udom." uname=".$uname);
1652:
1653:
1654: if($udom eq $currentdomainid) { # Reject new users for other domains...
1655:
1656: my $oldumask=umask(0077);
1657: chomp($npass);
1658: $npass=&unescape($npass);
1659: my $passfilename = &password_path($udom, $uname);
1660: &Debug("Password file created will be:".$passfilename);
1661: if (-e $passfilename) {
1662: &Failure( $client, "already_exists\n", $userinput);
1663: } else {
1664: my $fperror='';
1.264 albertel 1665: if (!&mkpath($passfilename)) {
1666: $fperror="error: ".($!+0)." mkdir failed while attempting "
1667: ."makeuser";
1.225 foxr 1668: }
1669: unless ($fperror) {
1670: my $result=&make_passwd_file($uname, $umode,$npass, $passfilename);
1671: &Reply($client, $result, $userinput); #BUGBUG - could be fail
1672: } else {
1673: &Failure($client, "$fperror\n", $userinput);
1674: }
1675: }
1676: umask($oldumask);
1677: } else {
1678: &Failure($client, "not_right_domain\n",
1679: $userinput); # Even if we are multihomed.
1680:
1681: }
1682: return 1;
1683:
1684: }
1685: ®ister_handler("makeuser", \&add_user_handler, 1, 1, 0);
1686:
1687: #
1688: # Change the authentication method of a user. Note that this may
1689: # also implicitly change the user's password if, for example, the user is
1690: # joining an existing authentication realm. Known authentication realms at
1691: # this time are:
1692: # internal - Purely internal password file (only loncapa knows this user)
1693: # local - Institutionally written authentication module.
1694: # unix - Unix user (/etc/passwd with or without /etc/shadow).
1695: # kerb4 - kerberos version 4
1696: # kerb5 - kerberos version 5
1697: #
1698: # Parameters:
1699: # $cmd - The command that got us here.
1700: # $tail - Tail of the command (remaining parameters).
1701: # $client - File descriptor connected to client.
1702: # Returns
1703: # 0 - Requested to exit, caller should shut down.
1704: # 1 - Continue processing.
1705: # Implicit inputs:
1706: # The authentication systems describe above have their own forms of implicit
1707: # input into the authentication process that are described above.
1.287 foxr 1708: # NOTE:
1709: # This is also used to change the authentication credential values (e.g. passwd).
1710: #
1.225 foxr 1711: #
1712: sub change_authentication_handler {
1713:
1714: my ($cmd, $tail, $client) = @_;
1715:
1716: my $userinput = "$cmd:$tail"; # Reconstruct user input.
1717:
1718: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
1719: &Debug("cmd = ".$cmd." domain= ".$udom."uname =".$uname." umode= ".$umode);
1720: if ($udom ne $currentdomainid) {
1721: &Failure( $client, "not_right_domain\n", $client);
1722: } else {
1723:
1724: chomp($npass);
1725:
1726: $npass=&unescape($npass);
1.261 foxr 1727: my $oldauth = &get_auth_type($udom, $uname); # Get old auth info.
1.225 foxr 1728: my $passfilename = &password_path($udom, $uname);
1729: if ($passfilename) { # Not allowed to create a new user!!
1.287 foxr 1730: # If just changing the unix passwd. need to arrange to run
1731: # passwd since otherwise make_passwd_file will run
1732: # lcuseradd which fails if an account already exists
1733: # (to prevent an unscrupulous LONCAPA admin from stealing
1734: # an existing account by overwriting it as a LonCAPA account).
1735:
1736: if(($oldauth =~/^unix/) && ($umode eq "unix")) {
1737: my $result = &change_unix_password($uname, $npass);
1738: &logthis("Result of password change for $uname: ".$result);
1739: if ($result eq "ok") {
1740: &Reply($client, "$result\n")
1.288 albertel 1741: } else {
1.287 foxr 1742: &Failure($client, "$result\n");
1743: }
1.288 albertel 1744: } else {
1.287 foxr 1745: my $result=&make_passwd_file($uname, $umode,$npass,$passfilename);
1746: #
1747: # If the current auth mode is internal, and the old auth mode was
1748: # unix, or krb*, and the user is an author for this domain,
1749: # re-run manage_permissions for that role in order to be able
1750: # to take ownership of the construction space back to www:www
1751: #
1752:
1753:
1754: if( (($oldauth =~ /^unix/) && ($umode eq "internal")) ||
1755: (($oldauth =~ /^internal/) && ($umode eq "unix")) ) {
1756: if(&is_author($udom, $uname)) {
1757: &Debug(" Need to manage author permissions...");
1758: &manage_permissions("/$udom/_au", $udom, $uname, "$umode:");
1759: }
1.261 foxr 1760: }
1.287 foxr 1761: &Reply($client, $result, $userinput);
1.261 foxr 1762: }
1763:
1764:
1.225 foxr 1765: } else {
1.251 foxr 1766: &Failure($client, "non_authorized\n", $userinput); # Fail the user now.
1.225 foxr 1767: }
1768: }
1769: return 1;
1770: }
1771: ®ister_handler("changeuserauth", \&change_authentication_handler, 1,1, 0);
1772:
1773: #
1774: # Determines if this is the home server for a user. The home server
1775: # for a user will have his/her lon-capa passwd file. Therefore all we need
1776: # to do is determine if this file exists.
1777: #
1778: # Parameters:
1779: # $cmd - The command that got us here.
1780: # $tail - Tail of the command (remaining parameters).
1781: # $client - File descriptor connected to client.
1782: # Returns
1783: # 0 - Requested to exit, caller should shut down.
1784: # 1 - Continue processing.
1785: # Implicit inputs:
1786: # The authentication systems describe above have their own forms of implicit
1787: # input into the authentication process that are described above.
1788: #
1789: sub is_home_handler {
1790: my ($cmd, $tail, $client) = @_;
1791:
1792: my $userinput = "$cmd:$tail";
1793:
1794: my ($udom,$uname)=split(/:/,$tail);
1795: chomp($uname);
1796: my $passfile = &password_filename($udom, $uname);
1797: if($passfile) {
1798: &Reply( $client, "found\n", $userinput);
1799: } else {
1800: &Failure($client, "not_found\n", $userinput);
1801: }
1802: return 1;
1803: }
1804: ®ister_handler("home", \&is_home_handler, 0,1,0);
1805:
1806: #
1807: # Process an update request for a resource?? I think what's going on here is
1808: # that a resource has been modified that we hold a subscription to.
1809: # If the resource is not local, then we must update, or at least invalidate our
1810: # cached copy of the resource.
1811: # FUTURE WORK:
1812: # I need to look at this logic carefully. My druthers would be to follow
1813: # typical caching logic, and simple invalidate the cache, drop any subscription
1814: # an let the next fetch start the ball rolling again... however that may
1815: # actually be more difficult than it looks given the complex web of
1816: # proxy servers.
1817: # Parameters:
1818: # $cmd - The command that got us here.
1819: # $tail - Tail of the command (remaining parameters).
1820: # $client - File descriptor connected to client.
1821: # Returns
1822: # 0 - Requested to exit, caller should shut down.
1823: # 1 - Continue processing.
1824: # Implicit inputs:
1825: # The authentication systems describe above have their own forms of implicit
1826: # input into the authentication process that are described above.
1827: #
1828: sub update_resource_handler {
1829:
1830: my ($cmd, $tail, $client) = @_;
1831:
1832: my $userinput = "$cmd:$tail";
1833:
1834: my $fname= $tail; # This allows interactive testing
1835:
1836:
1837: my $ownership=ishome($fname);
1838: if ($ownership eq 'not_owner') {
1839: if (-e $fname) {
1840: my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
1841: $atime,$mtime,$ctime,$blksize,$blocks)=stat($fname);
1842: my $now=time;
1843: my $since=$now-$atime;
1844: if ($since>$perlvar{'lonExpire'}) {
1845: my $reply=&reply("unsub:$fname","$clientname");
1.308 albertel 1846: &devalidate_meta_cache($fname);
1.225 foxr 1847: unlink("$fname");
1.334 albertel 1848: unlink("$fname.meta");
1.225 foxr 1849: } else {
1850: my $transname="$fname.in.transfer";
1851: my $remoteurl=&reply("sub:$fname","$clientname");
1852: my $response;
1853: alarm(120);
1854: {
1855: my $ua=new LWP::UserAgent;
1856: my $request=new HTTP::Request('GET',"$remoteurl");
1857: $response=$ua->request($request,$transname);
1858: }
1859: alarm(0);
1860: if ($response->is_error()) {
1861: unlink($transname);
1862: my $message=$response->status_line;
1863: &logthis("LWP GET: $message for $fname ($remoteurl)");
1864: } else {
1865: if ($remoteurl!~/\.meta$/) {
1866: alarm(120);
1867: {
1868: my $ua=new LWP::UserAgent;
1869: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1870: my $mresponse=$ua->request($mrequest,$fname.'.meta');
1871: if ($mresponse->is_error()) {
1872: unlink($fname.'.meta');
1873: }
1874: }
1875: alarm(0);
1876: }
1877: rename($transname,$fname);
1.308 albertel 1878: &devalidate_meta_cache($fname);
1.225 foxr 1879: }
1880: }
1881: &Reply( $client, "ok\n", $userinput);
1882: } else {
1883: &Failure($client, "not_found\n", $userinput);
1884: }
1885: } else {
1886: &Failure($client, "rejected\n", $userinput);
1887: }
1888: return 1;
1889: }
1890: ®ister_handler("update", \&update_resource_handler, 0 ,1, 0);
1891:
1.308 albertel 1892: sub devalidate_meta_cache {
1893: my ($url) = @_;
1894: use Cache::Memcached;
1895: my $memcache = new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
1896: $url = &declutter($url);
1897: $url =~ s-\.meta$--;
1898: my $id = &escape('meta:'.$url);
1899: $memcache->delete($id);
1900: }
1901:
1902: sub declutter {
1903: my $thisfn=shift;
1904: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
1905: $thisfn=~s/^\///;
1906: $thisfn=~s|^adm/wrapper/||;
1907: $thisfn=~s|^adm/coursedocs/showdoc/||;
1908: $thisfn=~s/^res\///;
1909: $thisfn=~s/\?.+$//;
1910: return $thisfn;
1911: }
1.225 foxr 1912: #
1.226 foxr 1913: # Fetch a user file from a remote server to the user's home directory
1914: # userfiles subdir.
1.225 foxr 1915: # Parameters:
1916: # $cmd - The command that got us here.
1917: # $tail - Tail of the command (remaining parameters).
1918: # $client - File descriptor connected to client.
1919: # Returns
1920: # 0 - Requested to exit, caller should shut down.
1921: # 1 - Continue processing.
1922: #
1923: sub fetch_user_file_handler {
1924:
1925: my ($cmd, $tail, $client) = @_;
1926:
1927: my $userinput = "$cmd:$tail";
1928: my $fname = $tail;
1.232 foxr 1929: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
1.225 foxr 1930: my $udir=&propath($udom,$uname).'/userfiles';
1931: unless (-e $udir) {
1932: mkdir($udir,0770);
1933: }
1.232 foxr 1934: Debug("fetch user file for $fname");
1.225 foxr 1935: if (-e $udir) {
1936: $ufile=~s/^[\.\~]+//;
1.232 foxr 1937:
1938: # IF necessary, create the path right down to the file.
1939: # Note that any regular files in the way of this path are
1940: # wiped out to deal with some earlier folly of mine.
1941:
1.267 raeburn 1942: if (!&mkpath($udir.'/'.$ufile)) {
1.264 albertel 1943: &Failure($client, "unable_to_create\n", $userinput);
1.232 foxr 1944: }
1945:
1.225 foxr 1946: my $destname=$udir.'/'.$ufile;
1947: my $transname=$udir.'/'.$ufile.'.in.transit';
1948: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
1949: my $response;
1.232 foxr 1950: Debug("Remote URL : $remoteurl Transfername $transname Destname: $destname");
1.225 foxr 1951: alarm(120);
1952: {
1953: my $ua=new LWP::UserAgent;
1954: my $request=new HTTP::Request('GET',"$remoteurl");
1955: $response=$ua->request($request,$transname);
1956: }
1957: alarm(0);
1958: if ($response->is_error()) {
1959: unlink($transname);
1960: my $message=$response->status_line;
1961: &logthis("LWP GET: $message for $fname ($remoteurl)");
1962: &Failure($client, "failed\n", $userinput);
1963: } else {
1.232 foxr 1964: Debug("Renaming $transname to $destname");
1.225 foxr 1965: if (!rename($transname,$destname)) {
1966: &logthis("Unable to move $transname to $destname");
1967: unlink($transname);
1968: &Failure($client, "failed\n", $userinput);
1969: } else {
1970: &Reply($client, "ok\n", $userinput);
1971: }
1972: }
1973: } else {
1974: &Failure($client, "not_home\n", $userinput);
1975: }
1976: return 1;
1977: }
1978: ®ister_handler("fetchuserfile", \&fetch_user_file_handler, 0, 1, 0);
1979:
1.226 foxr 1980: #
1981: # Remove a file from a user's home directory userfiles subdirectory.
1982: # Parameters:
1983: # cmd - the Lond request keyword that got us here.
1984: # tail - the part of the command past the keyword.
1985: # client- File descriptor connected with the client.
1986: #
1987: # Returns:
1988: # 1 - Continue processing.
1989: sub remove_user_file_handler {
1990: my ($cmd, $tail, $client) = @_;
1991:
1992: my ($fname) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
1993:
1994: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
1995: if ($ufile =~m|/\.\./|) {
1996: # any files paths with /../ in them refuse
1997: # to deal with
1998: &Failure($client, "refused\n", "$cmd:$tail");
1999: } else {
2000: my $udir = &propath($udom,$uname);
2001: if (-e $udir) {
2002: my $file=$udir.'/userfiles/'.$ufile;
2003: if (-e $file) {
1.253 foxr 2004: #
2005: # If the file is a regular file unlink is fine...
2006: # However it's possible the client wants a dir.
2007: # removed, in which case rmdir is more approprate:
2008: #
1.240 banghart 2009: if (-f $file){
1.241 albertel 2010: unlink($file);
2011: } elsif(-d $file) {
2012: rmdir($file);
1.240 banghart 2013: }
1.226 foxr 2014: if (-e $file) {
1.253 foxr 2015: # File is still there after we deleted it ?!?
2016:
1.226 foxr 2017: &Failure($client, "failed\n", "$cmd:$tail");
2018: } else {
2019: &Reply($client, "ok\n", "$cmd:$tail");
2020: }
2021: } else {
2022: &Failure($client, "not_found\n", "$cmd:$tail");
2023: }
2024: } else {
2025: &Failure($client, "not_home\n", "$cmd:$tail");
2026: }
2027: }
2028: return 1;
2029: }
2030: ®ister_handler("removeuserfile", \&remove_user_file_handler, 0,1,0);
2031:
1.236 albertel 2032: #
2033: # make a directory in a user's home directory userfiles subdirectory.
2034: # Parameters:
2035: # cmd - the Lond request keyword that got us here.
2036: # tail - the part of the command past the keyword.
2037: # client- File descriptor connected with the client.
2038: #
2039: # Returns:
2040: # 1 - Continue processing.
2041: sub mkdir_user_file_handler {
2042: my ($cmd, $tail, $client) = @_;
2043:
2044: my ($dir) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2045: $dir=&unescape($dir);
2046: my ($udom,$uname,$ufile) = ($dir =~ m|^([^/]+)/([^/]+)/(.+)$|);
2047: if ($ufile =~m|/\.\./|) {
2048: # any files paths with /../ in them refuse
2049: # to deal with
2050: &Failure($client, "refused\n", "$cmd:$tail");
2051: } else {
2052: my $udir = &propath($udom,$uname);
2053: if (-e $udir) {
1.264 albertel 2054: my $newdir=$udir.'/userfiles/'.$ufile.'/';
2055: if (!&mkpath($newdir)) {
2056: &Failure($client, "failed\n", "$cmd:$tail");
1.236 albertel 2057: }
1.264 albertel 2058: &Reply($client, "ok\n", "$cmd:$tail");
1.236 albertel 2059: } else {
2060: &Failure($client, "not_home\n", "$cmd:$tail");
2061: }
2062: }
2063: return 1;
2064: }
2065: ®ister_handler("mkdiruserfile", \&mkdir_user_file_handler, 0,1,0);
2066:
1.237 albertel 2067: #
2068: # rename a file in a user's home directory userfiles subdirectory.
2069: # Parameters:
2070: # cmd - the Lond request keyword that got us here.
2071: # tail - the part of the command past the keyword.
2072: # client- File descriptor connected with the client.
2073: #
2074: # Returns:
2075: # 1 - Continue processing.
2076: sub rename_user_file_handler {
2077: my ($cmd, $tail, $client) = @_;
2078:
2079: my ($udom,$uname,$old,$new) = split(/:/, $tail);
2080: $old=&unescape($old);
2081: $new=&unescape($new);
2082: if ($new =~m|/\.\./| || $old =~m|/\.\./|) {
2083: # any files paths with /../ in them refuse to deal with
2084: &Failure($client, "refused\n", "$cmd:$tail");
2085: } else {
2086: my $udir = &propath($udom,$uname);
2087: if (-e $udir) {
2088: my $oldfile=$udir.'/userfiles/'.$old;
2089: my $newfile=$udir.'/userfiles/'.$new;
2090: if (-e $newfile) {
2091: &Failure($client, "exists\n", "$cmd:$tail");
2092: } elsif (! -e $oldfile) {
2093: &Failure($client, "not_found\n", "$cmd:$tail");
2094: } else {
2095: if (!rename($oldfile,$newfile)) {
2096: &Failure($client, "failed\n", "$cmd:$tail");
2097: } else {
2098: &Reply($client, "ok\n", "$cmd:$tail");
2099: }
2100: }
2101: } else {
2102: &Failure($client, "not_home\n", "$cmd:$tail");
2103: }
2104: }
2105: return 1;
2106: }
2107: ®ister_handler("renameuserfile", \&rename_user_file_handler, 0,1,0);
2108:
1.227 foxr 2109: #
1.263 albertel 2110: # Authenticate access to a user file by checking that the token the user's
2111: # passed also exists in their session file
1.227 foxr 2112: #
2113: # Parameters:
2114: # cmd - The request keyword that dispatched to tus.
2115: # tail - The tail of the request (colon separated parameters).
2116: # client - Filehandle open on the client.
2117: # Return:
2118: # 1.
2119: sub token_auth_user_file_handler {
2120: my ($cmd, $tail, $client) = @_;
2121:
2122: my ($fname, $session) = split(/:/, $tail);
2123:
2124: chomp($session);
1.251 foxr 2125: my $reply="non_auth\n";
1.343 ! albertel 2126: my $file = $perlvar{'lonIDsDir'}.'/'.$session.'.id';
! 2127: if (open(ENVIN,"$file")) {
1.332 albertel 2128: flock(ENVIN,LOCK_SH);
1.343 ! albertel 2129: tie(my %disk_env,'GDBM_File',"$file",&GDBM_READER(),0640);
! 2130: if (exists($disk_env{"userfile.$fname"})) {
! 2131: $reply="ok\n";
! 2132: } else {
! 2133: foreach my $envname (keys(%disk_env)) {
! 2134: if ($envname=~ m|^userfile\.\Q$fname\E|) {
! 2135: $reply="ok\n";
! 2136: last;
! 2137: }
! 2138: }
1.227 foxr 2139: }
1.343 ! albertel 2140: untie(%disk_env);
1.227 foxr 2141: close(ENVIN);
1.251 foxr 2142: &Reply($client, $reply, "$cmd:$tail");
1.227 foxr 2143: } else {
2144: &Failure($client, "invalid_token\n", "$cmd:$tail");
2145: }
2146: return 1;
2147:
2148: }
2149: ®ister_handler("tokenauthuserfile", \&token_auth_user_file_handler, 0,1,0);
1.229 foxr 2150:
2151: #
2152: # Unsubscribe from a resource.
2153: #
2154: # Parameters:
2155: # $cmd - The command that got us here.
2156: # $tail - Tail of the command (remaining parameters).
2157: # $client - File descriptor connected to client.
2158: # Returns
2159: # 0 - Requested to exit, caller should shut down.
2160: # 1 - Continue processing.
2161: #
2162: sub unsubscribe_handler {
2163: my ($cmd, $tail, $client) = @_;
2164:
2165: my $userinput= "$cmd:$tail";
2166:
2167: my ($fname) = split(/:/,$tail); # Split in case there's extrs.
2168:
2169: &Debug("Unsubscribing $fname");
2170: if (-e $fname) {
2171: &Debug("Exists");
2172: &Reply($client, &unsub($fname,$clientip), $userinput);
2173: } else {
2174: &Failure($client, "not_found\n", $userinput);
2175: }
2176: return 1;
2177: }
2178: ®ister_handler("unsub", \&unsubscribe_handler, 0, 1, 0);
1.263 albertel 2179:
1.230 foxr 2180: # Subscribe to a resource
2181: #
2182: # Parameters:
2183: # $cmd - The command that got us here.
2184: # $tail - Tail of the command (remaining parameters).
2185: # $client - File descriptor connected to client.
2186: # Returns
2187: # 0 - Requested to exit, caller should shut down.
2188: # 1 - Continue processing.
2189: #
2190: sub subscribe_handler {
2191: my ($cmd, $tail, $client)= @_;
2192:
2193: my $userinput = "$cmd:$tail";
2194:
2195: &Reply( $client, &subscribe($userinput,$clientip), $userinput);
2196:
2197: return 1;
2198: }
2199: ®ister_handler("sub", \&subscribe_handler, 0, 1, 0);
2200:
2201: #
2202: # Determine the version of a resource (?) Or is it return
2203: # the top version of the resource? Not yet clear from the
2204: # code in currentversion.
2205: #
2206: # Parameters:
2207: # $cmd - The command that got us here.
2208: # $tail - Tail of the command (remaining parameters).
2209: # $client - File descriptor connected to client.
2210: # Returns
2211: # 0 - Requested to exit, caller should shut down.
2212: # 1 - Continue processing.
2213: #
2214: sub current_version_handler {
2215: my ($cmd, $tail, $client) = @_;
2216:
2217: my $userinput= "$cmd:$tail";
2218:
2219: my $fname = $tail;
2220: &Reply( $client, ¤tversion($fname)."\n", $userinput);
2221: return 1;
2222:
2223: }
2224: ®ister_handler("currentversion", \¤t_version_handler, 0, 1, 0);
2225:
2226: # Make an entry in a user's activity log.
2227: #
2228: # Parameters:
2229: # $cmd - The command that got us here.
2230: # $tail - Tail of the command (remaining parameters).
2231: # $client - File descriptor connected to client.
2232: # Returns
2233: # 0 - Requested to exit, caller should shut down.
2234: # 1 - Continue processing.
2235: #
2236: sub activity_log_handler {
2237: my ($cmd, $tail, $client) = @_;
2238:
2239:
2240: my $userinput= "$cmd:$tail";
2241:
2242: my ($udom,$uname,$what)=split(/:/,$tail);
2243: chomp($what);
2244: my $proname=&propath($udom,$uname);
2245: my $now=time;
2246: my $hfh;
2247: if ($hfh=IO::File->new(">>$proname/activity.log")) {
2248: print $hfh "$now:$clientname:$what\n";
2249: &Reply( $client, "ok\n", $userinput);
2250: } else {
2251: &Failure($client, "error: ".($!+0)." IO::File->new Failed "
2252: ."while attempting log\n",
2253: $userinput);
2254: }
2255:
2256: return 1;
2257: }
1.263 albertel 2258: ®ister_handler("log", \&activity_log_handler, 0, 1, 0);
1.230 foxr 2259:
2260: #
2261: # Put a namespace entry in a user profile hash.
2262: # My druthers would be for this to be an encrypted interaction too.
2263: # anything that might be an inadvertent covert channel about either
2264: # user authentication or user personal information....
2265: #
2266: # Parameters:
2267: # $cmd - The command that got us here.
2268: # $tail - Tail of the command (remaining parameters).
2269: # $client - File descriptor connected to client.
2270: # Returns
2271: # 0 - Requested to exit, caller should shut down.
2272: # 1 - Continue processing.
2273: #
2274: sub put_user_profile_entry {
2275: my ($cmd, $tail, $client) = @_;
1.229 foxr 2276:
1.230 foxr 2277: my $userinput = "$cmd:$tail";
2278:
1.242 raeburn 2279: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
1.230 foxr 2280: if ($namespace ne 'roles') {
2281: chomp($what);
2282: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2283: &GDBM_WRCREAT(),"P",$what);
2284: if($hashref) {
2285: my @pairs=split(/\&/,$what);
2286: foreach my $pair (@pairs) {
2287: my ($key,$value)=split(/=/,$pair);
2288: $hashref->{$key}=$value;
2289: }
1.311 albertel 2290: if (&untie_user_hash($hashref)) {
1.230 foxr 2291: &Reply( $client, "ok\n", $userinput);
2292: } else {
2293: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2294: "while attempting put\n",
2295: $userinput);
2296: }
2297: } else {
1.316 albertel 2298: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
1.230 foxr 2299: "while attempting put\n", $userinput);
2300: }
2301: } else {
2302: &Failure( $client, "refused\n", $userinput);
2303: }
2304:
2305: return 1;
2306: }
2307: ®ister_handler("put", \&put_user_profile_entry, 0, 1, 0);
2308:
1.283 albertel 2309: # Put a piece of new data in hash, returns error if entry already exists
2310: # Parameters:
2311: # $cmd - The command that got us here.
2312: # $tail - Tail of the command (remaining parameters).
2313: # $client - File descriptor connected to client.
2314: # Returns
2315: # 0 - Requested to exit, caller should shut down.
2316: # 1 - Continue processing.
2317: #
2318: sub newput_user_profile_entry {
2319: my ($cmd, $tail, $client) = @_;
2320:
2321: my $userinput = "$cmd:$tail";
2322:
2323: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
2324: if ($namespace eq 'roles') {
2325: &Failure( $client, "refused\n", $userinput);
2326: return 1;
2327: }
2328:
2329: chomp($what);
2330:
2331: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2332: &GDBM_WRCREAT(),"N",$what);
2333: if(!$hashref) {
1.316 albertel 2334: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
1.283 albertel 2335: "while attempting put\n", $userinput);
2336: return 1;
2337: }
2338:
2339: my @pairs=split(/\&/,$what);
2340: foreach my $pair (@pairs) {
2341: my ($key,$value)=split(/=/,$pair);
2342: if (exists($hashref->{$key})) {
2343: &Failure($client, "key_exists: ".$key."\n",$userinput);
2344: return 1;
2345: }
2346: }
2347:
2348: foreach my $pair (@pairs) {
2349: my ($key,$value)=split(/=/,$pair);
2350: $hashref->{$key}=$value;
2351: }
2352:
1.311 albertel 2353: if (&untie_user_hash($hashref)) {
1.283 albertel 2354: &Reply( $client, "ok\n", $userinput);
2355: } else {
2356: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2357: "while attempting put\n",
2358: $userinput);
2359: }
2360: return 1;
2361: }
2362: ®ister_handler("newput", \&newput_user_profile_entry, 0, 1, 0);
2363:
1.230 foxr 2364: #
2365: # Increment a profile entry in the user history file.
2366: # The history contains keyword value pairs. In this case,
2367: # The value itself is a pair of numbers. The first, the current value
2368: # the second an increment that this function applies to the current
2369: # value.
2370: #
2371: # Parameters:
2372: # $cmd - The command that got us here.
2373: # $tail - Tail of the command (remaining parameters).
2374: # $client - File descriptor connected to client.
2375: # Returns
2376: # 0 - Requested to exit, caller should shut down.
2377: # 1 - Continue processing.
2378: #
2379: sub increment_user_value_handler {
2380: my ($cmd, $tail, $client) = @_;
2381:
2382: my $userinput = "$cmd:$tail";
2383:
2384: my ($udom,$uname,$namespace,$what) =split(/:/,$tail);
2385: if ($namespace ne 'roles') {
2386: chomp($what);
2387: my $hashref = &tie_user_hash($udom, $uname,
2388: $namespace, &GDBM_WRCREAT(),
2389: "P",$what);
2390: if ($hashref) {
2391: my @pairs=split(/\&/,$what);
2392: foreach my $pair (@pairs) {
2393: my ($key,$value)=split(/=/,$pair);
1.284 raeburn 2394: $value = &unescape($value);
1.230 foxr 2395: # We could check that we have a number...
2396: if (! defined($value) || $value eq '') {
2397: $value = 1;
2398: }
2399: $hashref->{$key}+=$value;
1.284 raeburn 2400: if ($namespace eq 'nohist_resourcetracker') {
2401: if ($hashref->{$key} < 0) {
2402: $hashref->{$key} = 0;
2403: }
2404: }
1.230 foxr 2405: }
1.311 albertel 2406: if (&untie_user_hash($hashref)) {
1.230 foxr 2407: &Reply( $client, "ok\n", $userinput);
2408: } else {
2409: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2410: "while attempting inc\n", $userinput);
2411: }
2412: } else {
2413: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2414: "while attempting inc\n", $userinput);
2415: }
2416: } else {
2417: &Failure($client, "refused\n", $userinput);
2418: }
2419:
2420: return 1;
2421: }
2422: ®ister_handler("inc", \&increment_user_value_handler, 0, 1, 0);
2423:
2424: #
2425: # Put a new role for a user. Roles are LonCAPA's packaging of permissions.
2426: # Each 'role' a user has implies a set of permissions. Adding a new role
2427: # for a person grants the permissions packaged with that role
2428: # to that user when the role is selected.
2429: #
2430: # Parameters:
2431: # $cmd - The command string (rolesput).
2432: # $tail - The remainder of the request line. For rolesput this
2433: # consists of a colon separated list that contains:
2434: # The domain and user that is granting the role (logged).
2435: # The domain and user that is getting the role.
2436: # The roles being granted as a set of & separated pairs.
2437: # each pair a key value pair.
2438: # $client - File descriptor connected to the client.
2439: # Returns:
2440: # 0 - If the daemon should exit
2441: # 1 - To continue processing.
2442: #
2443: #
2444: sub roles_put_handler {
2445: my ($cmd, $tail, $client) = @_;
2446:
2447: my $userinput = "$cmd:$tail";
2448:
2449: my ( $exedom, $exeuser, $udom, $uname, $what) = split(/:/,$tail);
2450:
2451:
2452: my $namespace='roles';
2453: chomp($what);
2454: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2455: &GDBM_WRCREAT(), "P",
2456: "$exedom:$exeuser:$what");
2457: #
2458: # Log the attempt to set a role. The {}'s here ensure that the file
2459: # handle is open for the minimal amount of time. Since the flush
2460: # is done on close this improves the chances the log will be an un-
2461: # corrupted ordered thing.
2462: if ($hashref) {
1.261 foxr 2463: my $pass_entry = &get_auth_type($udom, $uname);
2464: my ($auth_type,$pwd) = split(/:/, $pass_entry);
2465: $auth_type = $auth_type.":";
1.230 foxr 2466: my @pairs=split(/\&/,$what);
2467: foreach my $pair (@pairs) {
2468: my ($key,$value)=split(/=/,$pair);
2469: &manage_permissions($key, $udom, $uname,
1.260 foxr 2470: $auth_type);
1.230 foxr 2471: $hashref->{$key}=$value;
2472: }
1.311 albertel 2473: if (&untie_user_hash($hashref)) {
1.230 foxr 2474: &Reply($client, "ok\n", $userinput);
2475: } else {
2476: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2477: "while attempting rolesput\n", $userinput);
2478: }
2479: } else {
2480: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2481: "while attempting rolesput\n", $userinput);
2482: }
2483: return 1;
2484: }
2485: ®ister_handler("rolesput", \&roles_put_handler, 1,1,0); # Encoded client only.
2486:
2487: #
1.231 foxr 2488: # Deletes (removes) a role for a user. This is equivalent to removing
2489: # a permissions package associated with the role from the user's profile.
2490: #
2491: # Parameters:
2492: # $cmd - The command (rolesdel)
2493: # $tail - The remainder of the request line. This consists
2494: # of:
2495: # The domain and user requesting the change (logged)
2496: # The domain and user being changed.
2497: # The roles being revoked. These are shipped to us
2498: # as a bunch of & separated role name keywords.
2499: # $client - The file handle open on the client.
2500: # Returns:
2501: # 1 - Continue processing
2502: # 0 - Exit.
2503: #
2504: sub roles_delete_handler {
2505: my ($cmd, $tail, $client) = @_;
2506:
2507: my $userinput = "$cmd:$tail";
2508:
2509: my ($exedom,$exeuser,$udom,$uname,$what)=split(/:/,$tail);
2510: &Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom.
2511: "what = ".$what);
2512: my $namespace='roles';
2513: chomp($what);
2514: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2515: &GDBM_WRCREAT(), "D",
2516: "$exedom:$exeuser:$what");
2517:
2518: if ($hashref) {
2519: my @rolekeys=split(/\&/,$what);
2520:
2521: foreach my $key (@rolekeys) {
2522: delete $hashref->{$key};
2523: }
1.315 albertel 2524: if (&untie_user_hash($hashref)) {
1.231 foxr 2525: &Reply($client, "ok\n", $userinput);
2526: } else {
2527: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2528: "while attempting rolesdel\n", $userinput);
2529: }
2530: } else {
2531: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2532: "while attempting rolesdel\n", $userinput);
2533: }
2534:
2535: return 1;
2536: }
2537: ®ister_handler("rolesdel", \&roles_delete_handler, 1,1, 0); # Encoded client only
2538:
2539: # Unencrypted get from a user's profile database. See
2540: # GetProfileEntryEncrypted for a version that does end-to-end encryption.
2541: # This function retrieves a keyed item from a specific named database in the
2542: # user's directory.
2543: #
2544: # Parameters:
2545: # $cmd - Command request keyword (get).
2546: # $tail - Tail of the command. This is a colon separated list
2547: # consisting of the domain and username that uniquely
2548: # identifies the profile,
2549: # The 'namespace' which selects the gdbm file to
2550: # do the lookup in,
2551: # & separated list of keys to lookup. Note that
2552: # the values are returned as an & separated list too.
2553: # $client - File descriptor open on the client.
2554: # Returns:
2555: # 1 - Continue processing.
2556: # 0 - Exit.
2557: #
2558: sub get_profile_entry {
2559: my ($cmd, $tail, $client) = @_;
2560:
2561: my $userinput= "$cmd:$tail";
2562:
2563: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2564: chomp($what);
1.255 foxr 2565:
2566: my $replystring = read_profile($udom, $uname, $namespace, $what);
2567: my ($first) = split(/:/,$replystring);
2568: if($first ne "error") {
2569: &Reply($client, "$replystring\n", $userinput);
1.231 foxr 2570: } else {
1.255 foxr 2571: &Failure($client, $replystring." while attempting get\n", $userinput);
1.231 foxr 2572: }
2573: return 1;
1.255 foxr 2574:
2575:
1.231 foxr 2576: }
2577: ®ister_handler("get", \&get_profile_entry, 0,1,0);
2578:
2579: #
2580: # Process the encrypted get request. Note that the request is sent
2581: # in clear, but the reply is encrypted. This is a small covert channel:
2582: # information about the sensitive keys is given to the snooper. Just not
2583: # information about the values of the sensitive key. Hmm if I wanted to
2584: # know these I'd snoop for the egets. Get the profile item names from them
2585: # and then issue a get for them since there's no enforcement of the
2586: # requirement of an encrypted get for particular profile items. If I
2587: # were re-doing this, I'd force the request to be encrypted as well as the
2588: # reply. I'd also just enforce encrypted transactions for all gets since
2589: # that would prevent any covert channel snooping.
2590: #
2591: # Parameters:
2592: # $cmd - Command keyword of request (eget).
2593: # $tail - Tail of the command. See GetProfileEntry
# for more information about this.
2594: # $client - File open on the client.
2595: # Returns:
2596: # 1 - Continue processing
2597: # 0 - server should exit.
2598: sub get_profile_entry_encrypted {
2599: my ($cmd, $tail, $client) = @_;
2600:
2601: my $userinput = "$cmd:$tail";
2602:
1.339 albertel 2603: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
1.231 foxr 2604: chomp($what);
1.255 foxr 2605: my $qresult = read_profile($udom, $uname, $namespace, $what);
2606: my ($first) = split(/:/, $qresult);
2607: if($first ne "error") {
2608:
2609: if ($cipher) {
2610: my $cmdlength=length($qresult);
2611: $qresult.=" ";
2612: my $encqresult='';
2613: for(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
2614: $encqresult.= unpack("H16",
2615: $cipher->encrypt(substr($qresult,
2616: $encidx,
2617: 8)));
2618: }
2619: &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput);
2620: } else {
1.231 foxr 2621: &Failure( $client, "error:no_key\n", $userinput);
2622: }
2623: } else {
1.255 foxr 2624: &Failure($client, "$qresult while attempting eget\n", $userinput);
2625:
1.231 foxr 2626: }
2627:
2628: return 1;
2629: }
1.255 foxr 2630: ®ister_handler("eget", \&get_profile_entry_encrypted, 0, 1, 0);
1.263 albertel 2631:
1.231 foxr 2632: #
2633: # Deletes a key in a user profile database.
2634: #
2635: # Parameters:
2636: # $cmd - Command keyword (del).
2637: # $tail - Command tail. IN this case a colon
2638: # separated list containing:
2639: # The domain and user that identifies uniquely
2640: # the identity of the user.
2641: # The profile namespace (name of the profile
2642: # database file).
2643: # & separated list of keywords to delete.
2644: # $client - File open on client socket.
2645: # Returns:
2646: # 1 - Continue processing
2647: # 0 - Exit server.
2648: #
2649: #
2650: sub delete_profile_entry {
2651: my ($cmd, $tail, $client) = @_;
2652:
2653: my $userinput = "cmd:$tail";
2654:
2655: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2656: chomp($what);
2657: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2658: &GDBM_WRCREAT(),
2659: "D",$what);
2660: if ($hashref) {
2661: my @keys=split(/\&/,$what);
2662: foreach my $key (@keys) {
2663: delete($hashref->{$key});
2664: }
1.315 albertel 2665: if (&untie_user_hash($hashref)) {
1.231 foxr 2666: &Reply($client, "ok\n", $userinput);
2667: } else {
2668: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2669: "while attempting del\n", $userinput);
2670: }
2671: } else {
2672: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2673: "while attempting del\n", $userinput);
2674: }
2675: return 1;
2676: }
2677: ®ister_handler("del", \&delete_profile_entry, 0, 1, 0);
1.263 albertel 2678:
1.231 foxr 2679: #
2680: # List the set of keys that are defined in a profile database file.
2681: # A successful reply from this will contain an & separated list of
2682: # the keys.
2683: # Parameters:
2684: # $cmd - Command request (keys).
2685: # $tail - Remainder of the request, a colon separated
2686: # list containing domain/user that identifies the
2687: # user being queried, and the database namespace
2688: # (database filename essentially).
2689: # $client - File open on the client.
2690: # Returns:
2691: # 1 - Continue processing.
2692: # 0 - Exit the server.
2693: #
2694: sub get_profile_keys {
2695: my ($cmd, $tail, $client) = @_;
2696:
2697: my $userinput = "$cmd:$tail";
2698:
2699: my ($udom,$uname,$namespace)=split(/:/,$tail);
2700: my $qresult='';
2701: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2702: &GDBM_READER());
2703: if ($hashref) {
2704: foreach my $key (keys %$hashref) {
2705: $qresult.="$key&";
2706: }
1.315 albertel 2707: if (&untie_user_hash($hashref)) {
1.231 foxr 2708: $qresult=~s/\&$//;
2709: &Reply($client, "$qresult\n", $userinput);
2710: } else {
2711: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2712: "while attempting keys\n", $userinput);
2713: }
2714: } else {
2715: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2716: "while attempting keys\n", $userinput);
2717: }
2718:
2719: return 1;
2720: }
2721: ®ister_handler("keys", \&get_profile_keys, 0, 1, 0);
2722:
2723: #
2724: # Dump the contents of a user profile database.
2725: # Note that this constitutes a very large covert channel too since
2726: # the dump will return sensitive information that is not encrypted.
2727: # The naive security assumption is that the session negotiation ensures
2728: # our client is trusted and I don't believe that's assured at present.
2729: # Sure want badly to go to ssl or tls. Of course if my peer isn't really
2730: # a LonCAPA node they could have negotiated an encryption key too so >sigh<.
2731: #
2732: # Parameters:
2733: # $cmd - The command request keyword (currentdump).
2734: # $tail - Remainder of the request, consisting of a colon
2735: # separated list that has the domain/username and
2736: # the namespace to dump (database file).
2737: # $client - file open on the remote client.
2738: # Returns:
2739: # 1 - Continue processing.
2740: # 0 - Exit the server.
2741: #
2742: sub dump_profile_database {
2743: my ($cmd, $tail, $client) = @_;
2744:
2745: my $userinput = "$cmd:$tail";
2746:
2747: my ($udom,$uname,$namespace) = split(/:/,$tail);
2748: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2749: &GDBM_READER());
2750: if ($hashref) {
2751: # Structure of %data:
2752: # $data{$symb}->{$parameter}=$value;
2753: # $data{$symb}->{'v.'.$parameter}=$version;
2754: # since $parameter will be unescaped, we do not
2755: # have to worry about silly parameter names...
2756:
2757: my $qresult='';
2758: my %data = (); # A hash of anonymous hashes..
2759: while (my ($key,$value) = each(%$hashref)) {
2760: my ($v,$symb,$param) = split(/:/,$key);
2761: next if ($v eq 'version' || $symb eq 'keys');
2762: next if (exists($data{$symb}) &&
2763: exists($data{$symb}->{$param}) &&
2764: $data{$symb}->{'v.'.$param} > $v);
2765: $data{$symb}->{$param}=$value;
2766: $data{$symb}->{'v.'.$param}=$v;
2767: }
1.311 albertel 2768: if (&untie_user_hash($hashref)) {
1.231 foxr 2769: while (my ($symb,$param_hash) = each(%data)) {
2770: while(my ($param,$value) = each (%$param_hash)){
2771: next if ($param =~ /^v\./); # Ignore versions...
2772: #
2773: # Just dump the symb=value pairs separated by &
2774: #
2775: $qresult.=$symb.':'.$param.'='.$value.'&';
2776: }
2777: }
2778: chop($qresult);
2779: &Reply($client , "$qresult\n", $userinput);
2780: } else {
2781: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2782: "while attempting currentdump\n", $userinput);
2783: }
2784: } else {
2785: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2786: "while attempting currentdump\n", $userinput);
2787: }
2788:
2789: return 1;
2790: }
2791: ®ister_handler("currentdump", \&dump_profile_database, 0, 1, 0);
2792:
2793: #
2794: # Dump a profile database with an optional regular expression
2795: # to match against the keys. In this dump, no effort is made
2796: # to separate symb from version information. Presumably the
2797: # databases that are dumped by this command are of a different
2798: # structure. Need to look at this and improve the documentation of
2799: # both this and the currentdump handler.
2800: # Parameters:
2801: # $cmd - The command keyword.
2802: # $tail - All of the characters after the $cmd:
2803: # These are expected to be a colon
2804: # separated list containing:
2805: # domain/user - identifying the user.
2806: # namespace - identifying the database.
2807: # regexp - optional regular expression
2808: # that is matched against
2809: # database keywords to do
2810: # selective dumps.
2811: # $client - Channel open on the client.
2812: # Returns:
2813: # 1 - Continue processing.
2814: # Side effects:
2815: # response is written to $client.
2816: #
2817: sub dump_with_regexp {
2818: my ($cmd, $tail, $client) = @_;
2819:
2820:
2821: my $userinput = "$cmd:$tail";
2822:
1.306 albertel 2823: my ($udom,$uname,$namespace,$regexp,$range)=split(/:/,$tail);
1.231 foxr 2824: if (defined($regexp)) {
2825: $regexp=&unescape($regexp);
2826: } else {
2827: $regexp='.';
2828: }
1.306 albertel 2829: my ($start,$end);
2830: if (defined($range)) {
2831: if ($range =~/^(\d+)\-(\d+)$/) {
2832: ($start,$end) = ($1,$2);
2833: } elsif ($range =~/^(\d+)$/) {
2834: ($start,$end) = (0,$1);
2835: } else {
2836: undef($range);
2837: }
2838: }
1.231 foxr 2839: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2840: &GDBM_READER());
2841: if ($hashref) {
2842: my $qresult='';
1.306 albertel 2843: my $count=0;
1.231 foxr 2844: while (my ($key,$value) = each(%$hashref)) {
2845: if ($regexp eq '.') {
1.306 albertel 2846: $count++;
2847: if (defined($range) && $count >= $end) { last; }
2848: if (defined($range) && $count < $start) { next; }
1.231 foxr 2849: $qresult.=$key.'='.$value.'&';
2850: } else {
2851: my $unescapeKey = &unescape($key);
2852: if (eval('$unescapeKey=~/$regexp/')) {
1.306 albertel 2853: $count++;
2854: if (defined($range) && $count >= $end) { last; }
2855: if (defined($range) && $count < $start) { next; }
1.231 foxr 2856: $qresult.="$key=$value&";
2857: }
2858: }
2859: }
1.311 albertel 2860: if (&untie_user_hash($hashref)) {
1.231 foxr 2861: chop($qresult);
2862: &Reply($client, "$qresult\n", $userinput);
2863: } else {
2864: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2865: "while attempting dump\n", $userinput);
2866: }
2867: } else {
2868: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2869: "while attempting dump\n", $userinput);
2870: }
2871:
2872: return 1;
2873: }
2874: ®ister_handler("dump", \&dump_with_regexp, 0, 1, 0);
2875:
2876: # Store a set of key=value pairs associated with a versioned name.
2877: #
2878: # Parameters:
2879: # $cmd - Request command keyword.
2880: # $tail - Tail of the request. This is a colon
2881: # separated list containing:
2882: # domain/user - User and authentication domain.
2883: # namespace - Name of the database being modified
2884: # rid - Resource keyword to modify.
2885: # what - new value associated with rid.
2886: #
2887: # $client - Socket open on the client.
2888: #
2889: #
2890: # Returns:
2891: # 1 (keep on processing).
2892: # Side-Effects:
2893: # Writes to the client
2894: sub store_handler {
2895: my ($cmd, $tail, $client) = @_;
2896:
2897: my $userinput = "$cmd:$tail";
2898:
2899: my ($udom,$uname,$namespace,$rid,$what) =split(/:/,$tail);
2900: if ($namespace ne 'roles') {
2901:
2902: chomp($what);
2903: my @pairs=split(/\&/,$what);
2904: my $hashref = &tie_user_hash($udom, $uname, $namespace,
1.268 albertel 2905: &GDBM_WRCREAT(), "S",
1.231 foxr 2906: "$rid:$what");
2907: if ($hashref) {
2908: my $now = time;
2909: my @previouskeys=split(/&/,$hashref->{"keys:$rid"});
2910: my $key;
2911: $hashref->{"version:$rid"}++;
2912: my $version=$hashref->{"version:$rid"};
2913: my $allkeys='';
2914: foreach my $pair (@pairs) {
2915: my ($key,$value)=split(/=/,$pair);
2916: $allkeys.=$key.':';
2917: $hashref->{"$version:$rid:$key"}=$value;
2918: }
2919: $hashref->{"$version:$rid:timestamp"}=$now;
2920: $allkeys.='timestamp';
2921: $hashref->{"$version:keys:$rid"}=$allkeys;
1.311 albertel 2922: if (&untie_user_hash($hashref)) {
1.231 foxr 2923: &Reply($client, "ok\n", $userinput);
2924: } else {
2925: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2926: "while attempting store\n", $userinput);
2927: }
2928: } else {
2929: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2930: "while attempting store\n", $userinput);
2931: }
2932: } else {
2933: &Failure($client, "refused\n", $userinput);
2934: }
2935:
2936: return 1;
2937: }
2938: ®ister_handler("store", \&store_handler, 0, 1, 0);
1.263 albertel 2939:
1.323 albertel 2940: # Modify a set of key=value pairs associated with a versioned name.
2941: #
2942: # Parameters:
2943: # $cmd - Request command keyword.
2944: # $tail - Tail of the request. This is a colon
2945: # separated list containing:
2946: # domain/user - User and authentication domain.
2947: # namespace - Name of the database being modified
2948: # rid - Resource keyword to modify.
2949: # v - Version item to modify
2950: # what - new value associated with rid.
2951: #
2952: # $client - Socket open on the client.
2953: #
2954: #
2955: # Returns:
2956: # 1 (keep on processing).
2957: # Side-Effects:
2958: # Writes to the client
2959: sub putstore_handler {
2960: my ($cmd, $tail, $client) = @_;
2961:
2962: my $userinput = "$cmd:$tail";
2963:
2964: my ($udom,$uname,$namespace,$rid,$v,$what) =split(/:/,$tail);
2965: if ($namespace ne 'roles') {
2966:
2967: chomp($what);
2968: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2969: &GDBM_WRCREAT(), "M",
2970: "$rid:$v:$what");
2971: if ($hashref) {
2972: my $now = time;
2973: my %data = &hash_extract($what);
2974: my @allkeys;
2975: while (my($key,$value) = each(%data)) {
2976: push(@allkeys,$key);
2977: $hashref->{"$v:$rid:$key"} = $value;
2978: }
2979: my $allkeys = join(':',@allkeys);
2980: $hashref->{"$v:keys:$rid"}=$allkeys;
2981:
2982: if (&untie_user_hash($hashref)) {
2983: &Reply($client, "ok\n", $userinput);
2984: } else {
2985: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2986: "while attempting store\n", $userinput);
2987: }
2988: } else {
2989: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2990: "while attempting store\n", $userinput);
2991: }
2992: } else {
2993: &Failure($client, "refused\n", $userinput);
2994: }
2995:
2996: return 1;
2997: }
2998: ®ister_handler("putstore", \&putstore_handler, 0, 1, 0);
2999:
3000: sub hash_extract {
3001: my ($str)=@_;
3002: my %hash;
3003: foreach my $pair (split(/\&/,$str)) {
3004: my ($key,$value)=split(/=/,$pair);
3005: $hash{$key}=$value;
3006: }
3007: return (%hash);
3008: }
3009: sub hash_to_str {
3010: my ($hash_ref)=@_;
3011: my $str;
3012: foreach my $key (keys(%$hash_ref)) {
3013: $str.=$key.'='.$hash_ref->{$key}.'&';
3014: }
3015: $str=~s/\&$//;
3016: return $str;
3017: }
3018:
1.231 foxr 3019: #
3020: # Dump out all versions of a resource that has key=value pairs associated
3021: # with it for each version. These resources are built up via the store
3022: # command.
3023: #
3024: # Parameters:
3025: # $cmd - Command keyword.
3026: # $tail - Remainder of the request which consists of:
3027: # domain/user - User and auth. domain.
3028: # namespace - name of resource database.
3029: # rid - Resource id.
3030: # $client - socket open on the client.
3031: #
3032: # Returns:
3033: # 1 indicating the caller should not yet exit.
3034: # Side-effects:
3035: # Writes a reply to the client.
3036: # The reply is a string of the following shape:
3037: # version=current&version:keys=k1:k2...&1:k1=v1&1:k2=v2...
3038: # Where the 1 above represents version 1.
3039: # this continues for all pairs of keys in all versions.
3040: #
3041: #
3042: #
3043: #
3044: sub restore_handler {
3045: my ($cmd, $tail, $client) = @_;
3046:
3047: my $userinput = "$cmd:$tail"; # Only used for logging purposes.
3048:
1.339 albertel 3049: my ($udom,$uname,$namespace,$rid) = split(/:/,$tail);
1.231 foxr 3050: $namespace=~s/\//\_/g;
3051: $namespace=~s/\W//g;
3052: chomp($rid);
3053: my $qresult='';
1.309 albertel 3054: my $hashref = &tie_user_hash($udom, $uname, $namespace, &GDBM_READER());
3055: if ($hashref) {
3056: my $version=$hashref->{"version:$rid"};
1.231 foxr 3057: $qresult.="version=$version&";
3058: my $scope;
3059: for ($scope=1;$scope<=$version;$scope++) {
1.309 albertel 3060: my $vkeys=$hashref->{"$scope:keys:$rid"};
1.231 foxr 3061: my @keys=split(/:/,$vkeys);
3062: my $key;
3063: $qresult.="$scope:keys=$vkeys&";
3064: foreach $key (@keys) {
1.309 albertel 3065: $qresult.="$scope:$key=".$hashref->{"$scope:$rid:$key"}."&";
1.231 foxr 3066: }
3067: }
1.311 albertel 3068: if (&untie_user_hash($hashref)) {
1.231 foxr 3069: $qresult=~s/\&$//;
3070: &Reply( $client, "$qresult\n", $userinput);
3071: } else {
3072: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3073: "while attempting restore\n", $userinput);
3074: }
3075: } else {
3076: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3077: "while attempting restore\n", $userinput);
3078: }
3079:
3080: return 1;
3081:
3082:
3083: }
3084: ®ister_handler("restore", \&restore_handler, 0,1,0);
1.234 foxr 3085:
3086: #
1.324 raeburn 3087: # Add a chat message to a synchronous discussion board.
1.234 foxr 3088: #
3089: # Parameters:
3090: # $cmd - Request keyword.
3091: # $tail - Tail of the command. A colon separated list
3092: # containing:
3093: # cdom - Domain on which the chat board lives
1.324 raeburn 3094: # cnum - Course containing the chat board.
3095: # newpost - Body of the posting.
3096: # group - Optional group, if chat board is only
3097: # accessible in a group within the course
1.234 foxr 3098: # $client - Socket open on the client.
3099: # Returns:
3100: # 1 - Indicating caller should keep on processing.
3101: #
3102: # Side-effects:
3103: # writes a reply to the client.
3104: #
3105: #
3106: sub send_chat_handler {
3107: my ($cmd, $tail, $client) = @_;
3108:
3109:
3110: my $userinput = "$cmd:$tail";
3111:
1.324 raeburn 3112: my ($cdom,$cnum,$newpost,$group)=split(/\:/,$tail);
3113: &chat_add($cdom,$cnum,$newpost,$group);
1.234 foxr 3114: &Reply($client, "ok\n", $userinput);
3115:
3116: return 1;
3117: }
3118: ®ister_handler("chatsend", \&send_chat_handler, 0, 1, 0);
1.263 albertel 3119:
1.234 foxr 3120: #
1.324 raeburn 3121: # Retrieve the set of chat messages from a discussion board.
1.234 foxr 3122: #
3123: # Parameters:
3124: # $cmd - Command keyword that initiated the request.
3125: # $tail - Remainder of the request after the command
3126: # keyword. In this case a colon separated list of
3127: # chat domain - Which discussion board.
3128: # chat id - Discussion thread(?)
3129: # domain/user - Authentication domain and username
3130: # of the requesting person.
1.324 raeburn 3131: # group - Optional course group containing
3132: # the board.
1.234 foxr 3133: # $client - Socket open on the client program.
3134: # Returns:
3135: # 1 - continue processing
3136: # Side effects:
3137: # Response is written to the client.
3138: #
3139: sub retrieve_chat_handler {
3140: my ($cmd, $tail, $client) = @_;
3141:
3142:
3143: my $userinput = "$cmd:$tail";
3144:
1.324 raeburn 3145: my ($cdom,$cnum,$udom,$uname,$group)=split(/\:/,$tail);
1.234 foxr 3146: my $reply='';
1.324 raeburn 3147: foreach (&get_chat($cdom,$cnum,$udom,$uname,$group)) {
1.234 foxr 3148: $reply.=&escape($_).':';
3149: }
3150: $reply=~s/\:$//;
3151: &Reply($client, $reply."\n", $userinput);
3152:
3153:
3154: return 1;
3155: }
3156: ®ister_handler("chatretr", \&retrieve_chat_handler, 0, 1, 0);
3157:
3158: #
3159: # Initiate a query of an sql database. SQL query repsonses get put in
3160: # a file for later retrieval. This prevents sql query results from
3161: # bottlenecking the system. Note that with loncnew, perhaps this is
3162: # less of an issue since multiple outstanding requests can be concurrently
3163: # serviced.
3164: #
3165: # Parameters:
3166: # $cmd - COmmand keyword that initiated the request.
3167: # $tail - Remainder of the command after the keyword.
3168: # For this function, this consists of a query and
3169: # 3 arguments that are self-documentingly labelled
3170: # in the original arg1, arg2, arg3.
3171: # $client - Socket open on the client.
3172: # Return:
3173: # 1 - Indicating processing should continue.
3174: # Side-effects:
3175: # a reply is written to $client.
3176: #
3177: sub send_query_handler {
3178: my ($cmd, $tail, $client) = @_;
3179:
3180:
3181: my $userinput = "$cmd:$tail";
3182:
3183: my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail);
3184: $query=~s/\n*$//g;
3185: &Reply($client, "". &sql_reply("$clientname\&$query".
3186: "\&$arg1"."\&$arg2"."\&$arg3")."\n",
3187: $userinput);
3188:
3189: return 1;
3190: }
3191: ®ister_handler("querysend", \&send_query_handler, 0, 1, 0);
3192:
3193: #
3194: # Add a reply to an sql query. SQL queries are done asyncrhonously.
3195: # The query is submitted via a "querysend" transaction.
3196: # There it is passed on to the lonsql daemon, queued and issued to
3197: # mysql.
3198: # This transaction is invoked when the sql transaction is complete
3199: # it stores the query results in flie and indicates query completion.
3200: # presumably local software then fetches this response... I'm guessing
3201: # the sequence is: lonc does a querysend, we ask lonsql to do it.
3202: # lonsql on completion of the query interacts with the lond of our
3203: # client to do a query reply storing two files:
3204: # - id - The results of the query.
3205: # - id.end - Indicating the transaction completed.
3206: # NOTE: id is a unique id assigned to the query and querysend time.
3207: # Parameters:
3208: # $cmd - Command keyword that initiated this request.
3209: # $tail - Remainder of the tail. In this case that's a colon
3210: # separated list containing the query Id and the
3211: # results of the query.
3212: # $client - Socket open on the client.
3213: # Return:
3214: # 1 - Indicating that we should continue processing.
3215: # Side effects:
3216: # ok written to the client.
3217: #
3218: sub reply_query_handler {
3219: my ($cmd, $tail, $client) = @_;
3220:
3221:
3222: my $userinput = "$cmd:$tail";
3223:
1.339 albertel 3224: my ($id,$reply)=split(/:/,$tail);
1.234 foxr 3225: my $store;
3226: my $execdir=$perlvar{'lonDaemons'};
3227: if ($store=IO::File->new(">$execdir/tmp/$id")) {
3228: $reply=~s/\&/\n/g;
3229: print $store $reply;
3230: close $store;
3231: my $store2=IO::File->new(">$execdir/tmp/$id.end");
3232: print $store2 "done\n";
3233: close $store2;
3234: &Reply($client, "ok\n", $userinput);
3235: } else {
3236: &Failure($client, "error: ".($!+0)
3237: ." IO::File->new Failed ".
3238: "while attempting queryreply\n", $userinput);
3239: }
3240:
3241:
3242: return 1;
3243: }
3244: ®ister_handler("queryreply", \&reply_query_handler, 0, 1, 0);
3245:
3246: #
3247: # Process the courseidput request. Not quite sure what this means
3248: # at the system level sense. It appears a gdbm file in the
3249: # /home/httpd/lonUsers/$domain/nohist_courseids is tied and
3250: # a set of entries made in that database.
3251: #
3252: # Parameters:
3253: # $cmd - The command keyword that initiated this request.
3254: # $tail - Tail of the command. In this case consists of a colon
3255: # separated list contaning the domain to apply this to and
3256: # an ampersand separated list of keyword=value pairs.
1.272 raeburn 3257: # Each value is a colon separated list that includes:
3258: # description, institutional code and course owner.
3259: # For backward compatibility with versions included
3260: # in LON-CAPA 1.1.X (and earlier) and 1.2.X, institutional
3261: # code and/or course owner are preserved from the existing
3262: # record when writing a new record in response to 1.1 or
3263: # 1.2 implementations of lonnet::flushcourselogs().
3264: #
1.234 foxr 3265: # $client - Socket open on the client.
3266: # Returns:
3267: # 1 - indicating that processing should continue
3268: #
3269: # Side effects:
3270: # reply is written to the client.
3271: #
3272: sub put_course_id_handler {
3273: my ($cmd, $tail, $client) = @_;
3274:
3275:
3276: my $userinput = "$cmd:$tail";
3277:
1.266 raeburn 3278: my ($udom, $what) = split(/:/, $tail,2);
1.234 foxr 3279: chomp($what);
3280: my $now=time;
3281: my @pairs=split(/\&/,$what);
3282:
3283: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3284: if ($hashref) {
3285: foreach my $pair (@pairs) {
1.271 raeburn 3286: my ($key,$courseinfo) = split(/=/,$pair,2);
3287: $courseinfo =~ s/=/:/g;
1.272 raeburn 3288:
1.273 albertel 3289: my @current_items = split(/:/,$hashref->{$key});
3290: shift(@current_items); # remove description
3291: pop(@current_items); # remove last access
1.272 raeburn 3292: my $numcurrent = scalar(@current_items);
3293:
1.273 albertel 3294: my @new_items = split(/:/,$courseinfo);
1.272 raeburn 3295: my $numnew = scalar(@new_items);
3296: if ($numcurrent > 0) {
1.333 raeburn 3297: if ($numnew <= $numcurrent) { # flushcourselogs() from pre 2.2
3298: for (my $j=$numcurrent-$numnew; $j>=0; $j--) {
3299: $courseinfo .= ':'.$current_items[$numcurrent-$j-1];
3300: }
1.272 raeburn 3301: }
3302: }
1.266 raeburn 3303: $hashref->{$key}=$courseinfo.':'.$now;
1.234 foxr 3304: }
1.311 albertel 3305: if (&untie_domain_hash($hashref)) {
1.253 foxr 3306: &Reply( $client, "ok\n", $userinput);
1.234 foxr 3307: } else {
1.253 foxr 3308: &Failure($client, "error: ".($!+0)
1.234 foxr 3309: ." untie(GDBM) Failed ".
3310: "while attempting courseidput\n", $userinput);
3311: }
3312: } else {
1.253 foxr 3313: &Failure($client, "error: ".($!+0)
1.234 foxr 3314: ." tie(GDBM) Failed ".
3315: "while attempting courseidput\n", $userinput);
3316: }
1.253 foxr 3317:
1.234 foxr 3318:
3319: return 1;
3320: }
3321: ®ister_handler("courseidput", \&put_course_id_handler, 0, 1, 0);
3322:
3323: # Retrieves the value of a course id resource keyword pattern
3324: # defined since a starting date. Both the starting date and the
3325: # keyword pattern are optional. If the starting date is not supplied it
3326: # is treated as the beginning of time. If the pattern is not found,
3327: # it is treatred as "." matching everything.
3328: #
3329: # Parameters:
3330: # $cmd - Command keyword that resulted in us being dispatched.
3331: # $tail - The remainder of the command that, in this case, consists
3332: # of a colon separated list of:
3333: # domain - The domain in which the course database is
3334: # defined.
3335: # since - Optional parameter describing the minimum
3336: # time of definition(?) of the resources that
3337: # will match the dump.
3338: # description - regular expression that is used to filter
3339: # the dump. Only keywords matching this regexp
3340: # will be used.
1.272 raeburn 3341: # institutional code - optional supplied code to filter
3342: # the dump. Only courses with an institutional code
3343: # that match the supplied code will be returned.
1.336 raeburn 3344: # owner - optional supplied username and domain of owner to
3345: # filter the dump. Only courses for which the course
3346: # owner matches the supplied username and/or domain
3347: # will be returned. Pre-2.2.0 legacy entries from
3348: # nohist_courseiddump will only contain usernames.
1.234 foxr 3349: # $client - The socket open on the client.
3350: # Returns:
3351: # 1 - Continue processing.
3352: # Side Effects:
3353: # a reply is written to $client.
3354: sub dump_course_id_handler {
3355: my ($cmd, $tail, $client) = @_;
3356:
3357: my $userinput = "$cmd:$tail";
3358:
1.333 raeburn 3359: my ($udom,$since,$description,$instcodefilter,$ownerfilter,$coursefilter,
3360: $typefilter) =split(/:/,$tail);
1.234 foxr 3361: if (defined($description)) {
3362: $description=&unescape($description);
3363: } else {
3364: $description='.';
3365: }
1.266 raeburn 3366: if (defined($instcodefilter)) {
3367: $instcodefilter=&unescape($instcodefilter);
3368: } else {
3369: $instcodefilter='.';
3370: }
1.336 raeburn 3371: my ($ownerunamefilter,$ownerdomfilter);
1.266 raeburn 3372: if (defined($ownerfilter)) {
3373: $ownerfilter=&unescape($ownerfilter);
1.336 raeburn 3374: if ($ownerfilter ne '.' && defined($ownerfilter)) {
3375: if ($ownerfilter =~ /^([^:]*):([^:]*)$/) {
3376: $ownerunamefilter = $1;
3377: $ownerdomfilter = $2;
3378: } else {
3379: $ownerunamefilter = $ownerfilter;
3380: $ownerdomfilter = '';
3381: }
3382: }
1.266 raeburn 3383: } else {
3384: $ownerfilter='.';
3385: }
1.336 raeburn 3386:
1.282 raeburn 3387: if (defined($coursefilter)) {
3388: $coursefilter=&unescape($coursefilter);
3389: } else {
3390: $coursefilter='.';
3391: }
1.333 raeburn 3392: if (defined($typefilter)) {
3393: $typefilter=&unescape($typefilter);
3394: } else {
3395: $typefilter='.';
3396: }
1.266 raeburn 3397:
1.234 foxr 3398: unless (defined($since)) { $since=0; }
3399: my $qresult='';
3400: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3401: if ($hashref) {
3402: while (my ($key,$value) = each(%$hashref)) {
1.333 raeburn 3403: my ($descr,$lasttime,$inst_code,$owner,$type);
1.274 albertel 3404: my @courseitems = split(/:/,$value);
3405: $lasttime = pop(@courseitems);
1.333 raeburn 3406: ($descr,$inst_code,$owner,$type)=@courseitems;
1.234 foxr 3407: if ($lasttime<$since) { next; }
1.266 raeburn 3408: my $match = 1;
3409: unless ($description eq '.') {
3410: my $unescapeDescr = &unescape($descr);
3411: unless (eval('$unescapeDescr=~/\Q$description\E/i')) {
3412: $match = 0;
1.234 foxr 3413: }
1.266 raeburn 3414: }
3415: unless ($instcodefilter eq '.' || !defined($instcodefilter)) {
3416: my $unescapeInstcode = &unescape($inst_code);
3417: unless (eval('$unescapeInstcode=~/\Q$instcodefilter\E/i')) {
3418: $match = 0;
3419: }
1.234 foxr 3420: }
1.266 raeburn 3421: unless ($ownerfilter eq '.' || !defined($ownerfilter)) {
3422: my $unescapeOwner = &unescape($owner);
1.336 raeburn 3423: if (($ownerunamefilter ne '') && ($ownerdomfilter ne '')) {
3424: if ($unescapeOwner =~ /:/) {
3425: if (eval('$unescapeOwner !~
3426: /\Q$ownerunamefilter\E:\Q$ownerdomfilter\E$/i')) {
3427: $match = 0;
3428: }
3429: } else {
3430: if (eval('$unescapeOwner!~/\Q$ownerunamefilter\E/i')) {
3431: $match = 0;
3432: }
3433: }
3434: } elsif ($ownerunamefilter ne '') {
3435: if ($unescapeOwner =~ /:/) {
3436: if (eval('$unescapeOwner!~/\Q$ownerunamefilter\E:[^:]+$/i')) {
3437: $match = 0;
3438: }
3439: } else {
3440: if (eval('$unescapeOwner!~/\Q$ownerunamefilter\E/i')) {
3441: $match = 0;
3442: }
3443: }
3444: } elsif ($ownerdomfilter ne '') {
3445: if ($unescapeOwner =~ /:/) {
3446: if (eval('$unescapeOwner!~/^[^:]+:\Q$ownerdomfilter\E/')) {
3447: $match = 0;
3448: }
3449: } else {
3450: if ($ownerdomfilter ne $udom) {
3451: $match = 0;
3452: }
3453: }
1.266 raeburn 3454: }
3455: }
1.282 raeburn 3456: unless ($coursefilter eq '.' || !defined($coursefilter)) {
3457: my $unescapeCourse = &unescape($key);
3458: unless (eval('$unescapeCourse=~/^$udom(_)\Q$coursefilter\E$/')) {
3459: $match = 0;
3460: }
3461: }
1.333 raeburn 3462: unless ($typefilter eq '.' || !defined($typefilter)) {
3463: my $unescapeType = &unescape($type);
1.342 albertel 3464: if ($type eq '') {
1.333 raeburn 3465: if ($typefilter ne 'Course') {
3466: $match = 0;
3467: }
3468: } else {
3469: unless (eval('$unescapeType=~/^\Q$typefilter\E$/')) {
3470: $match = 0;
3471: }
3472: }
3473: }
1.266 raeburn 3474: if ($match == 1) {
3475: $qresult.=$key.'='.$descr.':'.$inst_code.':'.$owner.'&';
3476: }
1.234 foxr 3477: }
1.311 albertel 3478: if (&untie_domain_hash($hashref)) {
1.234 foxr 3479: chop($qresult);
3480: &Reply($client, "$qresult\n", $userinput);
3481: } else {
3482: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3483: "while attempting courseiddump\n", $userinput);
3484: }
3485: } else {
3486: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3487: "while attempting courseiddump\n", $userinput);
3488: }
3489:
3490:
3491: return 1;
3492: }
3493: ®ister_handler("courseiddump", \&dump_course_id_handler, 0, 1, 0);
1.238 foxr 3494:
3495: #
3496: # Puts an id to a domains id database.
3497: #
3498: # Parameters:
3499: # $cmd - The command that triggered us.
3500: # $tail - Remainder of the request other than the command. This is a
3501: # colon separated list containing:
3502: # $domain - The domain for which we are writing the id.
3503: # $pairs - The id info to write... this is and & separated list
3504: # of keyword=value.
3505: # $client - Socket open on the client.
3506: # Returns:
3507: # 1 - Continue processing.
3508: # Side effects:
3509: # reply is written to $client.
3510: #
3511: sub put_id_handler {
3512: my ($cmd,$tail,$client) = @_;
3513:
3514:
3515: my $userinput = "$cmd:$tail";
3516:
3517: my ($udom,$what)=split(/:/,$tail);
3518: chomp($what);
3519: my @pairs=split(/\&/,$what);
3520: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
3521: "P", $what);
3522: if ($hashref) {
3523: foreach my $pair (@pairs) {
3524: my ($key,$value)=split(/=/,$pair);
3525: $hashref->{$key}=$value;
3526: }
1.311 albertel 3527: if (&untie_domain_hash($hashref)) {
1.238 foxr 3528: &Reply($client, "ok\n", $userinput);
3529: } else {
3530: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3531: "while attempting idput\n", $userinput);
3532: }
3533: } else {
3534: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3535: "while attempting idput\n", $userinput);
3536: }
3537:
3538: return 1;
3539: }
1.263 albertel 3540: ®ister_handler("idput", \&put_id_handler, 0, 1, 0);
1.238 foxr 3541:
3542: #
3543: # Retrieves a set of id values from the id database.
3544: # Returns an & separated list of results, one for each requested id to the
3545: # client.
3546: #
3547: # Parameters:
3548: # $cmd - Command keyword that caused us to be dispatched.
3549: # $tail - Tail of the command. Consists of a colon separated:
3550: # domain - the domain whose id table we dump
3551: # ids Consists of an & separated list of
3552: # id keywords whose values will be fetched.
3553: # nonexisting keywords will have an empty value.
3554: # $client - Socket open on the client.
3555: #
3556: # Returns:
3557: # 1 - indicating processing should continue.
3558: # Side effects:
3559: # An & separated list of results is written to $client.
3560: #
3561: sub get_id_handler {
3562: my ($cmd, $tail, $client) = @_;
3563:
3564:
3565: my $userinput = "$client:$tail";
3566:
3567: my ($udom,$what)=split(/:/,$tail);
3568: chomp($what);
3569: my @queries=split(/\&/,$what);
3570: my $qresult='';
3571: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_READER());
3572: if ($hashref) {
3573: for (my $i=0;$i<=$#queries;$i++) {
3574: $qresult.="$hashref->{$queries[$i]}&";
3575: }
1.311 albertel 3576: if (&untie_domain_hash($hashref)) {
1.238 foxr 3577: $qresult=~s/\&$//;
3578: &Reply($client, "$qresult\n", $userinput);
3579: } else {
3580: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3581: "while attempting idget\n",$userinput);
3582: }
3583: } else {
3584: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3585: "while attempting idget\n",$userinput);
3586: }
3587:
3588: return 1;
3589: }
1.263 albertel 3590: ®ister_handler("idget", \&get_id_handler, 0, 1, 0);
1.238 foxr 3591:
3592: #
1.299 raeburn 3593: # Puts broadcast e-mail sent by Domain Coordinator in nohist_dcmail database
3594: #
3595: # Parameters
3596: # $cmd - Command keyword that caused us to be dispatched.
3597: # $tail - Tail of the command. Consists of a colon separated:
3598: # domain - the domain whose dcmail we are recording
3599: # email Consists of key=value pair
3600: # where key is unique msgid
3601: # and value is message (in XML)
3602: # $client - Socket open on the client.
3603: #
3604: # Returns:
3605: # 1 - indicating processing should continue.
3606: # Side effects
3607: # reply is written to $client.
3608: #
3609: sub put_dcmail_handler {
3610: my ($cmd,$tail,$client) = @_;
3611: my $userinput = "$cmd:$tail";
3612:
3613: my ($udom,$what)=split(/:/,$tail);
3614: chomp($what);
3615: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
3616: if ($hashref) {
3617: my ($key,$value)=split(/=/,$what);
3618: $hashref->{$key}=$value;
3619: }
1.311 albertel 3620: if (&untie_domain_hash($hashref)) {
1.299 raeburn 3621: &Reply($client, "ok\n", $userinput);
3622: } else {
3623: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3624: "while attempting dcmailput\n", $userinput);
3625: }
3626: return 1;
3627: }
3628: ®ister_handler("dcmailput", \&put_dcmail_handler, 0, 1, 0);
3629:
3630: #
3631: # Retrieves broadcast e-mail from nohist_dcmail database
3632: # Returns to client an & separated list of key=value pairs,
3633: # where key is msgid and value is message information.
3634: #
3635: # Parameters
3636: # $cmd - Command keyword that caused us to be dispatched.
3637: # $tail - Tail of the command. Consists of a colon separated:
3638: # domain - the domain whose dcmail table we dump
3639: # startfilter - beginning of time window
3640: # endfilter - end of time window
3641: # sendersfilter - & separated list of username:domain
3642: # for senders to search for.
3643: # $client - Socket open on the client.
3644: #
3645: # Returns:
3646: # 1 - indicating processing should continue.
3647: # Side effects
3648: # reply (& separated list of msgid=messageinfo pairs) is
3649: # written to $client.
3650: #
3651: sub dump_dcmail_handler {
3652: my ($cmd, $tail, $client) = @_;
3653:
3654: my $userinput = "$cmd:$tail";
3655: my ($udom,$startfilter,$endfilter,$sendersfilter) = split(/:/,$tail);
3656: chomp($sendersfilter);
3657: my @senders = ();
3658: if (defined($startfilter)) {
3659: $startfilter=&unescape($startfilter);
3660: } else {
3661: $startfilter='.';
3662: }
3663: if (defined($endfilter)) {
3664: $endfilter=&unescape($endfilter);
3665: } else {
3666: $endfilter='.';
3667: }
3668: if (defined($sendersfilter)) {
3669: $sendersfilter=&unescape($sendersfilter);
1.300 albertel 3670: @senders = map { &unescape($_) } split(/\&/,$sendersfilter);
1.299 raeburn 3671: }
3672:
3673: my $qresult='';
3674: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
3675: if ($hashref) {
3676: while (my ($key,$value) = each(%$hashref)) {
3677: my $match = 1;
1.303 albertel 3678: my ($timestamp,$subj,$uname,$udom) =
3679: split(/:/,&unescape(&unescape($key)),5); # yes, twice really
1.299 raeburn 3680: $subj = &unescape($subj);
3681: unless ($startfilter eq '.' || !defined($startfilter)) {
3682: if ($timestamp < $startfilter) {
3683: $match = 0;
3684: }
3685: }
3686: unless ($endfilter eq '.' || !defined($endfilter)) {
3687: if ($timestamp > $endfilter) {
3688: $match = 0;
3689: }
3690: }
3691: unless (@senders < 1) {
3692: unless (grep/^$uname:$udom$/,@senders) {
3693: $match = 0;
3694: }
3695: }
3696: if ($match == 1) {
3697: $qresult.=$key.'='.$value.'&';
3698: }
3699: }
1.311 albertel 3700: if (&untie_domain_hash($hashref)) {
1.299 raeburn 3701: chop($qresult);
3702: &Reply($client, "$qresult\n", $userinput);
3703: } else {
3704: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3705: "while attempting dcmaildump\n", $userinput);
3706: }
3707: } else {
3708: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3709: "while attempting dcmaildump\n", $userinput);
3710: }
3711: return 1;
3712: }
3713:
3714: ®ister_handler("dcmaildump", \&dump_dcmail_handler, 0, 1, 0);
3715:
3716: #
3717: # Puts domain roles in nohist_domainroles database
3718: #
3719: # Parameters
3720: # $cmd - Command keyword that caused us to be dispatched.
3721: # $tail - Tail of the command. Consists of a colon separated:
3722: # domain - the domain whose roles we are recording
3723: # role - Consists of key=value pair
3724: # where key is unique role
3725: # and value is start/end date information
3726: # $client - Socket open on the client.
3727: #
3728: # Returns:
3729: # 1 - indicating processing should continue.
3730: # Side effects
3731: # reply is written to $client.
3732: #
3733:
3734: sub put_domainroles_handler {
3735: my ($cmd,$tail,$client) = @_;
3736:
3737: my $userinput = "$cmd:$tail";
3738: my ($udom,$what)=split(/:/,$tail);
3739: chomp($what);
3740: my @pairs=split(/\&/,$what);
3741: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
3742: if ($hashref) {
3743: foreach my $pair (@pairs) {
3744: my ($key,$value)=split(/=/,$pair);
3745: $hashref->{$key}=$value;
3746: }
1.311 albertel 3747: if (&untie_domain_hash($hashref)) {
1.299 raeburn 3748: &Reply($client, "ok\n", $userinput);
3749: } else {
3750: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3751: "while attempting domroleput\n", $userinput);
3752: }
3753: } else {
3754: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3755: "while attempting domroleput\n", $userinput);
3756: }
3757:
3758: return 1;
3759: }
3760:
3761: ®ister_handler("domroleput", \&put_domainroles_handler, 0, 1, 0);
3762:
3763: #
3764: # Retrieves domain roles from nohist_domainroles database
3765: # Returns to client an & separated list of key=value pairs,
3766: # where key is role and value is start and end date information.
3767: #
3768: # Parameters
3769: # $cmd - Command keyword that caused us to be dispatched.
3770: # $tail - Tail of the command. Consists of a colon separated:
3771: # domain - the domain whose domain roles table we dump
3772: # $client - Socket open on the client.
3773: #
3774: # Returns:
3775: # 1 - indicating processing should continue.
3776: # Side effects
3777: # reply (& separated list of role=start/end info pairs) is
3778: # written to $client.
3779: #
3780: sub dump_domainroles_handler {
3781: my ($cmd, $tail, $client) = @_;
3782:
3783: my $userinput = "$cmd:$tail";
3784: my ($udom,$startfilter,$endfilter,$rolesfilter) = split(/:/,$tail);
3785: chomp($rolesfilter);
3786: my @roles = ();
3787: if (defined($startfilter)) {
3788: $startfilter=&unescape($startfilter);
3789: } else {
3790: $startfilter='.';
3791: }
3792: if (defined($endfilter)) {
3793: $endfilter=&unescape($endfilter);
3794: } else {
3795: $endfilter='.';
3796: }
3797: if (defined($rolesfilter)) {
3798: $rolesfilter=&unescape($rolesfilter);
1.300 albertel 3799: @roles = split(/\&/,$rolesfilter);
1.299 raeburn 3800: }
3801:
3802: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
3803: if ($hashref) {
3804: my $qresult = '';
3805: while (my ($key,$value) = each(%$hashref)) {
3806: my $match = 1;
3807: my ($start,$end) = split(/:/,&unescape($value));
3808: my ($trole,$uname,$udom,$runame,$rudom,$rsec) = split(/:/,&unescape($key));
3809: unless ($startfilter eq '.' || !defined($startfilter)) {
3810: if ($start >= $startfilter) {
3811: $match = 0;
3812: }
3813: }
3814: unless ($endfilter eq '.' || !defined($endfilter)) {
3815: if ($end <= $endfilter) {
3816: $match = 0;
3817: }
3818: }
3819: unless (@roles < 1) {
3820: unless (grep/^$trole$/,@roles) {
3821: $match = 0;
3822: }
3823: }
3824: if ($match == 1) {
3825: $qresult.=$key.'='.$value.'&';
3826: }
3827: }
1.311 albertel 3828: if (&untie_domain_hash($hashref)) {
1.299 raeburn 3829: chop($qresult);
3830: &Reply($client, "$qresult\n", $userinput);
3831: } else {
3832: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3833: "while attempting domrolesdump\n", $userinput);
3834: }
3835: } else {
3836: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3837: "while attempting domrolesdump\n", $userinput);
3838: }
3839: return 1;
3840: }
3841:
3842: ®ister_handler("domrolesdump", \&dump_domainroles_handler, 0, 1, 0);
3843:
3844:
1.238 foxr 3845: # Process the tmpput command I'm not sure what this does.. Seems to
3846: # create a file in the lonDaemons/tmp directory of the form $id.tmp
3847: # where Id is the client's ip concatenated with a sequence number.
3848: # The file will contain some value that is passed in. Is this e.g.
3849: # a login token?
3850: #
3851: # Parameters:
3852: # $cmd - The command that got us dispatched.
3853: # $tail - The remainder of the request following $cmd:
3854: # In this case this will be the contents of the file.
3855: # $client - Socket connected to the client.
3856: # Returns:
3857: # 1 indicating processing can continue.
3858: # Side effects:
3859: # A file is created in the local filesystem.
3860: # A reply is sent to the client.
3861: sub tmp_put_handler {
3862: my ($cmd, $what, $client) = @_;
3863:
3864: my $userinput = "$cmd:$what"; # Reconstruct for logging.
3865:
3866:
3867: my $store;
3868: $tmpsnum++;
3869: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
3870: $id=~s/\W/\_/g;
3871: $what=~s/\n//g;
3872: my $execdir=$perlvar{'lonDaemons'};
3873: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
3874: print $store $what;
3875: close $store;
3876: &Reply($client, "$id\n", $userinput);
3877: } else {
3878: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
3879: "while attempting tmpput\n", $userinput);
3880: }
3881: return 1;
3882:
3883: }
3884: ®ister_handler("tmpput", \&tmp_put_handler, 0, 1, 0);
1.263 albertel 3885:
1.238 foxr 3886: # Processes the tmpget command. This command returns the contents
3887: # of a temporary resource file(?) created via tmpput.
3888: #
3889: # Paramters:
3890: # $cmd - Command that got us dispatched.
3891: # $id - Tail of the command, contain the id of the resource
3892: # we want to fetch.
3893: # $client - socket open on the client.
3894: # Return:
3895: # 1 - Inidcating processing can continue.
3896: # Side effects:
3897: # A reply is sent to the client.
3898: #
3899: sub tmp_get_handler {
3900: my ($cmd, $id, $client) = @_;
3901:
3902: my $userinput = "$cmd:$id";
3903:
3904:
3905: $id=~s/\W/\_/g;
3906: my $store;
3907: my $execdir=$perlvar{'lonDaemons'};
3908: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
3909: my $reply=<$store>;
3910: &Reply( $client, "$reply\n", $userinput);
3911: close $store;
3912: } else {
3913: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
3914: "while attempting tmpget\n", $userinput);
3915: }
3916:
3917: return 1;
3918: }
3919: ®ister_handler("tmpget", \&tmp_get_handler, 0, 1, 0);
1.263 albertel 3920:
1.238 foxr 3921: #
3922: # Process the tmpdel command. This command deletes a temp resource
3923: # created by the tmpput command.
3924: #
3925: # Parameters:
3926: # $cmd - Command that got us here.
3927: # $id - Id of the temporary resource created.
3928: # $client - socket open on the client process.
3929: #
3930: # Returns:
3931: # 1 - Indicating processing should continue.
3932: # Side Effects:
3933: # A file is deleted
3934: # A reply is sent to the client.
3935: sub tmp_del_handler {
3936: my ($cmd, $id, $client) = @_;
3937:
3938: my $userinput= "$cmd:$id";
3939:
3940: chomp($id);
3941: $id=~s/\W/\_/g;
3942: my $execdir=$perlvar{'lonDaemons'};
3943: if (unlink("$execdir/tmp/$id.tmp")) {
3944: &Reply($client, "ok\n", $userinput);
3945: } else {
3946: &Failure( $client, "error: ".($!+0)."Unlink tmp Failed ".
3947: "while attempting tmpdel\n", $userinput);
3948: }
3949:
3950: return 1;
3951:
3952: }
3953: ®ister_handler("tmpdel", \&tmp_del_handler, 0, 1, 0);
1.263 albertel 3954:
1.238 foxr 3955: #
1.246 foxr 3956: # Processes the setannounce command. This command
3957: # creates a file named announce.txt in the top directory of
3958: # the documentn root and sets its contents. The announce.txt file is
3959: # printed in its entirety at the LonCAPA login page. Note:
3960: # once the announcement.txt fileis created it cannot be deleted.
3961: # However, setting the contents of the file to empty removes the
3962: # announcement from the login page of loncapa so who cares.
3963: #
3964: # Parameters:
3965: # $cmd - The command that got us dispatched.
3966: # $announcement - The text of the announcement.
3967: # $client - Socket open on the client process.
3968: # Retunrns:
3969: # 1 - Indicating request processing should continue
3970: # Side Effects:
3971: # The file {DocRoot}/announcement.txt is created.
3972: # A reply is sent to $client.
3973: #
3974: sub set_announce_handler {
3975: my ($cmd, $announcement, $client) = @_;
3976:
3977: my $userinput = "$cmd:$announcement";
3978:
3979: chomp($announcement);
3980: $announcement=&unescape($announcement);
3981: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
3982: '/announcement.txt')) {
3983: print $store $announcement;
3984: close $store;
3985: &Reply($client, "ok\n", $userinput);
3986: } else {
3987: &Failure($client, "error: ".($!+0)."\n", $userinput);
3988: }
3989:
3990: return 1;
3991: }
3992: ®ister_handler("setannounce", \&set_announce_handler, 0, 1, 0);
1.263 albertel 3993:
1.246 foxr 3994: #
3995: # Return the version of the daemon. This can be used to determine
3996: # the compatibility of cross version installations or, alternatively to
3997: # simply know who's out of date and who isn't. Note that the version
3998: # is returned concatenated with the tail.
3999: # Parameters:
4000: # $cmd - the request that dispatched to us.
4001: # $tail - Tail of the request (client's version?).
4002: # $client - Socket open on the client.
4003: #Returns:
4004: # 1 - continue processing requests.
4005: # Side Effects:
4006: # Replies with version to $client.
4007: sub get_version_handler {
4008: my ($cmd, $tail, $client) = @_;
4009:
4010: my $userinput = $cmd.$tail;
4011:
4012: &Reply($client, &version($userinput)."\n", $userinput);
4013:
4014:
4015: return 1;
4016: }
4017: ®ister_handler("version", \&get_version_handler, 0, 1, 0);
1.263 albertel 4018:
1.246 foxr 4019: # Set the current host and domain. This is used to support
4020: # multihomed systems. Each IP of the system, or even separate daemons
4021: # on the same IP can be treated as handling a separate lonCAPA virtual
4022: # machine. This command selects the virtual lonCAPA. The client always
4023: # knows the right one since it is lonc and it is selecting the domain/system
4024: # from the hosts.tab file.
4025: # Parameters:
4026: # $cmd - Command that dispatched us.
4027: # $tail - Tail of the command (domain/host requested).
4028: # $socket - Socket open on the client.
4029: #
4030: # Returns:
4031: # 1 - Indicates the program should continue to process requests.
4032: # Side-effects:
4033: # The default domain/system context is modified for this daemon.
4034: # a reply is sent to the client.
4035: #
4036: sub set_virtual_host_handler {
4037: my ($cmd, $tail, $socket) = @_;
4038:
4039: my $userinput ="$cmd:$tail";
4040:
4041: &Reply($client, &sethost($userinput)."\n", $userinput);
4042:
4043:
4044: return 1;
4045: }
1.247 albertel 4046: ®ister_handler("sethost", \&set_virtual_host_handler, 0, 1, 0);
1.246 foxr 4047:
4048: # Process a request to exit:
4049: # - "bye" is sent to the client.
4050: # - The client socket is shutdown and closed.
4051: # - We indicate to the caller that we should exit.
4052: # Formal Parameters:
4053: # $cmd - The command that got us here.
4054: # $tail - Tail of the command (empty).
4055: # $client - Socket open on the tail.
4056: # Returns:
4057: # 0 - Indicating the program should exit!!
4058: #
4059: sub exit_handler {
4060: my ($cmd, $tail, $client) = @_;
4061:
4062: my $userinput = "$cmd:$tail";
4063:
4064: &logthis("Client $clientip ($clientname) hanging up: $userinput");
4065: &Reply($client, "bye\n", $userinput);
4066: $client->shutdown(2); # shutdown the socket forcibly.
4067: $client->close();
4068:
4069: return 0;
4070: }
1.248 foxr 4071: ®ister_handler("exit", \&exit_handler, 0,1,1);
4072: ®ister_handler("init", \&exit_handler, 0,1,1);
4073: ®ister_handler("quit", \&exit_handler, 0,1,1);
4074:
4075: # Determine if auto-enrollment is enabled.
4076: # Note that the original had what I believe to be a defect.
4077: # The original returned 0 if the requestor was not a registerd client.
4078: # It should return "refused".
4079: # Formal Parameters:
4080: # $cmd - The command that invoked us.
4081: # $tail - The tail of the command (Extra command parameters.
4082: # $client - The socket open on the client that issued the request.
4083: # Returns:
4084: # 1 - Indicating processing should continue.
4085: #
4086: sub enrollment_enabled_handler {
4087: my ($cmd, $tail, $client) = @_;
4088: my $userinput = $cmd.":".$tail; # For logging purposes.
4089:
4090:
1.337 albertel 4091: my ($cdom) = split(/:/, $tail, 2); # Domain we're asking about.
4092:
1.248 foxr 4093: my $outcome = &localenroll::run($cdom);
4094: &Reply($client, "$outcome\n", $userinput);
4095:
4096: return 1;
4097: }
4098: ®ister_handler("autorun", \&enrollment_enabled_handler, 0, 1, 0);
4099:
4100: # Get the official sections for which auto-enrollment is possible.
4101: # Since the admin people won't know about 'unofficial sections'
4102: # we cannot auto-enroll on them.
4103: # Formal Parameters:
4104: # $cmd - The command request that got us dispatched here.
4105: # $tail - The remainder of the request. In our case this
4106: # will be split into:
4107: # $coursecode - The course name from the admin point of view.
4108: # $cdom - The course's domain(?).
4109: # $client - Socket open on the client.
4110: # Returns:
4111: # 1 - Indiciting processing should continue.
4112: #
4113: sub get_sections_handler {
4114: my ($cmd, $tail, $client) = @_;
4115: my $userinput = "$cmd:$tail";
4116:
4117: my ($coursecode, $cdom) = split(/:/, $tail);
4118: my @secs = &localenroll::get_sections($coursecode,$cdom);
4119: my $seclist = &escape(join(':',@secs));
4120:
4121: &Reply($client, "$seclist\n", $userinput);
4122:
4123:
4124: return 1;
4125: }
4126: ®ister_handler("autogetsections", \&get_sections_handler, 0, 1, 0);
4127:
4128: # Validate the owner of a new course section.
4129: #
4130: # Formal Parameters:
4131: # $cmd - Command that got us dispatched.
4132: # $tail - the remainder of the command. For us this consists of a
4133: # colon separated string containing:
4134: # $inst - Course Id from the institutions point of view.
4135: # $owner - Proposed owner of the course.
4136: # $cdom - Domain of the course (from the institutions
4137: # point of view?)..
4138: # $client - Socket open on the client.
4139: #
4140: # Returns:
4141: # 1 - Processing should continue.
4142: #
4143: sub validate_course_owner_handler {
4144: my ($cmd, $tail, $client) = @_;
4145: my $userinput = "$cmd:$tail";
4146: my ($inst_course_id, $owner, $cdom) = split(/:/, $tail);
4147:
1.336 raeburn 4148: $owner = &unescape($owner);
1.248 foxr 4149: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom);
4150: &Reply($client, "$outcome\n", $userinput);
4151:
4152:
4153:
4154: return 1;
4155: }
4156: ®ister_handler("autonewcourse", \&validate_course_owner_handler, 0, 1, 0);
1.263 albertel 4157:
1.248 foxr 4158: #
4159: # Validate a course section in the official schedule of classes
4160: # from the institutions point of view (part of autoenrollment).
4161: #
4162: # Formal Parameters:
4163: # $cmd - The command request that got us dispatched.
4164: # $tail - The tail of the command. In this case,
4165: # this is a colon separated set of words that will be split
4166: # into:
4167: # $inst_course_id - The course/section id from the
4168: # institutions point of view.
4169: # $cdom - The domain from the institutions
4170: # point of view.
4171: # $client - Socket open on the client.
4172: # Returns:
4173: # 1 - Indicating processing should continue.
4174: #
4175: sub validate_course_section_handler {
4176: my ($cmd, $tail, $client) = @_;
4177: my $userinput = "$cmd:$tail";
4178: my ($inst_course_id, $cdom) = split(/:/, $tail);
4179:
4180: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
4181: &Reply($client, "$outcome\n", $userinput);
4182:
4183:
4184: return 1;
4185: }
4186: ®ister_handler("autovalidatecourse", \&validate_course_section_handler, 0, 1, 0);
4187:
4188: #
1.340 raeburn 4189: # Validate course owner's access to enrollment data for specific class section.
4190: #
4191: #
4192: # Formal Parameters:
4193: # $cmd - The command request that got us dispatched.
4194: # $tail - The tail of the command. In this case this is a colon separated
4195: # set of words that will be split into:
4196: # $inst_class - Institutional code for the specific class section
4197: # $courseowner - The escaped username:domain of the course owner
4198: # $cdom - The domain of the course from the institution's
4199: # point of view.
4200: # $client - The socket open on the client.
4201: # Returns:
4202: # 1 - continue processing.
4203: #
4204:
4205: sub validate_class_access_handler {
4206: my ($cmd, $tail, $client) = @_;
4207: my $userinput = "$cmd:$tail";
4208: my ($inst_class,$courseowner,$cdom) = split(/:/, $tail);
4209: $courseowner = &unescape($courseowner);
1.341 albertel 4210: my $outcome;
4211: eval {
4212: local($SIG{__DIE__})='DEFAULT';
4213: $outcome=&localenroll::check_section($inst_class,$courseowner,$cdom);
4214: };
1.340 raeburn 4215: &Reply($client,"$outcome\n", $userinput);
4216:
4217: return 1;
4218: }
4219: ®ister_handler("autovalidateclass_sec", \&validate_class_access_handler, 0, 1, 0);
4220:
4221: #
4222: # Create a password for a new LON-CAPA user added by auto-enrollment.
4223: # Only used for case where authentication method for new user is localauth
1.248 foxr 4224: #
4225: # Formal Parameters:
4226: # $cmd - The command request that got us dispatched.
4227: # $tail - The tail of the command. In this case this is a colon separated
4228: # set of words that will be split into:
1.340 raeburn 4229: # $authparam - An authentication parameter (localauth parameter).
1.248 foxr 4230: # $cdom - The domain of the course from the institution's
4231: # point of view.
4232: # $client - The socket open on the client.
4233: # Returns:
4234: # 1 - continue processing.
4235: #
4236: sub create_auto_enroll_password_handler {
4237: my ($cmd, $tail, $client) = @_;
4238: my $userinput = "$cmd:$tail";
4239:
4240: my ($authparam, $cdom) = split(/:/, $userinput);
4241:
4242: my ($create_passwd,$authchk);
4243: ($authparam,
4244: $create_passwd,
4245: $authchk) = &localenroll::create_password($authparam,$cdom);
4246:
4247: &Reply($client, &escape($authparam.':'.$create_passwd.':'.$authchk)."\n",
4248: $userinput);
4249:
4250:
4251: return 1;
4252: }
4253: ®ister_handler("autocreatepassword", \&create_auto_enroll_password_handler,
4254: 0, 1, 0);
4255:
4256: # Retrieve and remove temporary files created by/during autoenrollment.
4257: #
4258: # Formal Parameters:
4259: # $cmd - The command that got us dispatched.
4260: # $tail - The tail of the command. In our case this is a colon
4261: # separated list that will be split into:
4262: # $filename - The name of the file to remove.
4263: # The filename is given as a path relative to
4264: # the LonCAPA temp file directory.
4265: # $client - Socket open on the client.
4266: #
4267: # Returns:
4268: # 1 - Continue processing.
4269: sub retrieve_auto_file_handler {
4270: my ($cmd, $tail, $client) = @_;
4271: my $userinput = "cmd:$tail";
4272:
4273: my ($filename) = split(/:/, $tail);
4274:
4275: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
4276: if ( (-e $source) && ($filename ne '') ) {
4277: my $reply = '';
4278: if (open(my $fh,$source)) {
4279: while (<$fh>) {
4280: chomp($_);
4281: $_ =~ s/^\s+//g;
4282: $_ =~ s/\s+$//g;
4283: $reply .= $_;
4284: }
4285: close($fh);
4286: &Reply($client, &escape($reply)."\n", $userinput);
4287:
4288: # Does this have to be uncommented??!? (RF).
4289: #
4290: # unlink($source);
4291: } else {
4292: &Failure($client, "error\n", $userinput);
4293: }
4294: } else {
4295: &Failure($client, "error\n", $userinput);
4296: }
4297:
4298:
4299: return 1;
4300: }
4301: ®ister_handler("autoretrieve", \&retrieve_auto_file_handler, 0,1,0);
4302:
4303: #
4304: # Read and retrieve institutional code format (for support form).
4305: # Formal Parameters:
4306: # $cmd - Command that dispatched us.
4307: # $tail - Tail of the command. In this case it conatins
4308: # the course domain and the coursename.
4309: # $client - Socket open on the client.
4310: # Returns:
4311: # 1 - Continue processing.
4312: #
4313: sub get_institutional_code_format_handler {
4314: my ($cmd, $tail, $client) = @_;
4315: my $userinput = "$cmd:$tail";
4316:
4317: my $reply;
4318: my($cdom,$course) = split(/:/,$tail);
4319: my @pairs = split/\&/,$course;
4320: my %instcodes = ();
4321: my %codes = ();
4322: my @codetitles = ();
4323: my %cat_titles = ();
4324: my %cat_order = ();
4325: foreach (@pairs) {
4326: my ($key,$value) = split/=/,$_;
4327: $instcodes{&unescape($key)} = &unescape($value);
4328: }
4329: my $formatreply = &localenroll::instcode_format($cdom,
4330: \%instcodes,
4331: \%codes,
4332: \@codetitles,
4333: \%cat_titles,
4334: \%cat_order);
4335: if ($formatreply eq 'ok') {
4336: my $codes_str = &hash2str(%codes);
4337: my $codetitles_str = &array2str(@codetitles);
4338: my $cat_titles_str = &hash2str(%cat_titles);
4339: my $cat_order_str = &hash2str(%cat_order);
4340: &Reply($client,
4341: $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'
4342: .$cat_order_str."\n",
4343: $userinput);
4344: } else {
4345: # this else branch added by RF since if not ok, lonc will
4346: # hang waiting on reply until timeout.
4347: #
4348: &Reply($client, "format_error\n", $userinput);
4349: }
4350:
4351: return 1;
4352: }
1.265 albertel 4353: ®ister_handler("autoinstcodeformat",
4354: \&get_institutional_code_format_handler,0,1,0);
1.246 foxr 4355:
1.317 raeburn 4356: # Get domain specific conditions for import of student photographs to a course
4357: #
4358: # Retrieves information from photo_permission subroutine in localenroll.
4359: # Returns outcome (ok) if no processing errors, and whether course owner is
4360: # required to accept conditions of use (yes/no).
4361: #
4362: #
4363: sub photo_permission_handler {
4364: my ($cmd, $tail, $client) = @_;
4365: my $userinput = "$cmd:$tail";
4366: my $cdom = $tail;
4367: my ($perm_reqd,$conditions);
1.320 albertel 4368: my $outcome;
4369: eval {
4370: local($SIG{__DIE__})='DEFAULT';
4371: $outcome = &localenroll::photo_permission($cdom,\$perm_reqd,
4372: \$conditions);
4373: };
4374: if (!$@) {
4375: &Reply($client, &escape($outcome.':'.$perm_reqd.':'. $conditions)."\n",
4376: $userinput);
4377: } else {
4378: &Failure($client,"unknown_cmd\n",$userinput);
4379: }
4380: return 1;
1.317 raeburn 4381: }
4382: ®ister_handler("autophotopermission",\&photo_permission_handler,0,1,0);
4383:
4384: #
4385: # Checks if student photo is available for a user in the domain, in the user's
4386: # directory (in /userfiles/internal/studentphoto.jpg).
4387: # Uses localstudentphoto:fetch() to ensure there is an up to date copy of
4388: # the student's photo.
4389:
4390: sub photo_check_handler {
4391: my ($cmd, $tail, $client) = @_;
4392: my $userinput = "$cmd:$tail";
4393: my ($udom,$uname,$pid) = split(/:/,$tail);
4394: $udom = &unescape($udom);
4395: $uname = &unescape($uname);
4396: $pid = &unescape($pid);
4397: my $path=&propath($udom,$uname).'/userfiles/internal/';
4398: if (!-e $path) {
4399: &mkpath($path);
4400: }
4401: my $response;
4402: my $result = &localstudentphoto::fetch($udom,$uname,$pid,\$response);
4403: $result .= ':'.$response;
4404: &Reply($client, &escape($result)."\n",$userinput);
1.320 albertel 4405: return 1;
1.317 raeburn 4406: }
4407: ®ister_handler("autophotocheck",\&photo_check_handler,0,1,0);
4408:
4409: #
4410: # Retrieve information from localenroll about whether to provide a button
4411: # for users who have enbled import of student photos to initiate an
4412: # update of photo files for registered students. Also include
4413: # comment to display alongside button.
4414:
4415: sub photo_choice_handler {
4416: my ($cmd, $tail, $client) = @_;
4417: my $userinput = "$cmd:$tail";
4418: my $cdom = &unescape($tail);
1.320 albertel 4419: my ($update,$comment);
4420: eval {
4421: local($SIG{__DIE__})='DEFAULT';
4422: ($update,$comment) = &localenroll::manager_photo_update($cdom);
4423: };
4424: if (!$@) {
4425: &Reply($client,&escape($update).':'.&escape($comment)."\n",$userinput);
4426: } else {
4427: &Failure($client,"unknown_cmd\n",$userinput);
4428: }
4429: return 1;
1.317 raeburn 4430: }
4431: ®ister_handler("autophotochoice",\&photo_choice_handler,0,1,0);
4432:
1.265 albertel 4433: #
4434: # Gets a student's photo to exist (in the correct image type) in the user's
4435: # directory.
4436: # Formal Parameters:
4437: # $cmd - The command request that got us dispatched.
4438: # $tail - A colon separated set of words that will be split into:
4439: # $domain - student's domain
4440: # $uname - student username
4441: # $type - image type desired
4442: # $client - The socket open on the client.
4443: # Returns:
4444: # 1 - continue processing.
1.317 raeburn 4445:
1.265 albertel 4446: sub student_photo_handler {
4447: my ($cmd, $tail, $client) = @_;
1.317 raeburn 4448: my ($domain,$uname,$ext,$type) = split(/:/, $tail);
1.265 albertel 4449:
1.317 raeburn 4450: my $path=&propath($domain,$uname). '/userfiles/internal/';
4451: my $filename = 'studentphoto.'.$ext;
4452: if ($type eq 'thumbnail') {
4453: $filename = 'studentphoto_tn.'.$ext;
4454: }
4455: if (-e $path.$filename) {
1.265 albertel 4456: &Reply($client,"ok\n","$cmd:$tail");
4457: return 1;
4458: }
4459: &mkpath($path);
1.317 raeburn 4460: my $file;
4461: if ($type eq 'thumbnail') {
1.320 albertel 4462: eval {
4463: local($SIG{__DIE__})='DEFAULT';
4464: $file=&localstudentphoto::fetch_thumbnail($domain,$uname);
4465: };
1.317 raeburn 4466: } else {
4467: $file=&localstudentphoto::fetch($domain,$uname);
4468: }
1.265 albertel 4469: if (!$file) {
4470: &Failure($client,"unavailable\n","$cmd:$tail");
4471: return 1;
4472: }
1.317 raeburn 4473: if (!-e $path.$filename) { &convert_photo($file,$path.$filename); }
4474: if (-e $path.$filename) {
1.265 albertel 4475: &Reply($client,"ok\n","$cmd:$tail");
4476: return 1;
4477: }
4478: &Failure($client,"unable_to_convert\n","$cmd:$tail");
4479: return 1;
4480: }
4481: ®ister_handler("studentphoto", \&student_photo_handler, 0, 1, 0);
1.246 foxr 4482:
1.264 albertel 4483: # mkpath makes all directories for a file, expects an absolute path with a
4484: # file or a trailing / if just a dir is passed
4485: # returns 1 on success 0 on failure
4486: sub mkpath {
4487: my ($file)=@_;
4488: my @parts=split(/\//,$file,-1);
4489: my $now=$parts[0].'/'.$parts[1].'/'.$parts[2];
4490: for (my $i=3;$i<= ($#parts-1);$i++) {
1.265 albertel 4491: $now.='/'.$parts[$i];
1.264 albertel 4492: if (!-e $now) {
4493: if (!mkdir($now,0770)) { return 0; }
4494: }
4495: }
4496: return 1;
4497: }
4498:
1.207 foxr 4499: #---------------------------------------------------------------
4500: #
4501: # Getting, decoding and dispatching requests:
4502: #
4503: #
4504: # Get a Request:
4505: # Gets a Request message from the client. The transaction
4506: # is defined as a 'line' of text. We remove the new line
4507: # from the text line.
1.226 foxr 4508: #
1.211 albertel 4509: sub get_request {
1.207 foxr 4510: my $input = <$client>;
4511: chomp($input);
1.226 foxr 4512:
1.234 foxr 4513: &Debug("get_request: Request = $input\n");
1.207 foxr 4514:
4515: &status('Processing '.$clientname.':'.$input);
4516:
4517: return $input;
4518: }
1.212 foxr 4519: #---------------------------------------------------------------
4520: #
4521: # Process a request. This sub should shrink as each action
4522: # gets farmed out into a separat sub that is registered
4523: # with the dispatch hash.
4524: #
4525: # Parameters:
4526: # user_input - The request received from the client (lonc).
4527: # Returns:
4528: # true to keep processing, false if caller should exit.
4529: #
4530: sub process_request {
4531: my ($userinput) = @_; # Easier for now to break style than to
4532: # fix all the userinput -> user_input.
4533: my $wasenc = 0; # True if request was encrypted.
4534: # ------------------------------------------------------------ See if encrypted
1.322 albertel 4535: # for command
4536: # sethost:<server>
4537: # <command>:<args>
4538: # we just send it to the processor
4539: # for
4540: # sethost:<server>:<command>:<args>
4541: # we do the implict set host and then do the command
4542: if ($userinput =~ /^sethost:/) {
4543: (my $cmd,my $newid,$userinput) = split(':',$userinput,3);
4544: if (defined($userinput)) {
4545: &sethost("$cmd:$newid");
4546: } else {
4547: $userinput = "$cmd:$newid";
4548: }
4549: }
4550:
1.212 foxr 4551: if ($userinput =~ /^enc/) {
4552: $userinput = decipher($userinput);
4553: $wasenc=1;
4554: if(!$userinput) { # Cipher not defined.
1.251 foxr 4555: &Failure($client, "error: Encrypted data without negotated key\n");
1.212 foxr 4556: return 0;
4557: }
4558: }
4559: Debug("process_request: $userinput\n");
4560:
1.213 foxr 4561: #
4562: # The 'correct way' to add a command to lond is now to
4563: # write a sub to execute it and Add it to the command dispatch
4564: # hash via a call to register_handler.. The comments to that
4565: # sub should give you enough to go on to show how to do this
4566: # along with the examples that are building up as this code
4567: # is getting refactored. Until all branches of the
4568: # if/elseif monster below have been factored out into
4569: # separate procesor subs, if the dispatch hash is missing
4570: # the command keyword, we will fall through to the remainder
4571: # of the if/else chain below in order to keep this thing in
4572: # working order throughout the transmogrification.
4573:
4574: my ($command, $tail) = split(/:/, $userinput, 2);
4575: chomp($command);
4576: chomp($tail);
4577: $tail =~ s/(\r)//; # This helps people debugging with e.g. telnet.
1.214 foxr 4578: $command =~ s/(\r)//; # And this too for parameterless commands.
4579: if(!$tail) {
4580: $tail =""; # defined but blank.
4581: }
1.213 foxr 4582:
4583: &Debug("Command received: $command, encoded = $wasenc");
4584:
4585: if(defined $Dispatcher{$command}) {
4586:
4587: my $dispatch_info = $Dispatcher{$command};
4588: my $handler = $$dispatch_info[0];
4589: my $need_encode = $$dispatch_info[1];
4590: my $client_types = $$dispatch_info[2];
4591: Debug("Matched dispatch hash: mustencode: $need_encode "
4592: ."ClientType $client_types");
4593:
4594: # Validate the request:
4595:
4596: my $ok = 1;
4597: my $requesterprivs = 0;
4598: if(&isClient()) {
4599: $requesterprivs |= $CLIENT_OK;
4600: }
4601: if(&isManager()) {
4602: $requesterprivs |= $MANAGER_OK;
4603: }
4604: if($need_encode && (!$wasenc)) {
4605: Debug("Must encode but wasn't: $need_encode $wasenc");
4606: $ok = 0;
4607: }
4608: if(($client_types & $requesterprivs) == 0) {
4609: Debug("Client not privileged to do this operation");
4610: $ok = 0;
4611: }
4612:
4613: if($ok) {
4614: Debug("Dispatching to handler $command $tail");
4615: my $keep_going = &$handler($command, $tail, $client);
4616: return $keep_going;
4617: } else {
4618: Debug("Refusing to dispatch because client did not match requirements");
4619: Failure($client, "refused\n", $userinput);
4620: return 1;
4621: }
4622:
4623: }
4624:
1.262 foxr 4625: print $client "unknown_cmd\n";
1.212 foxr 4626: # -------------------------------------------------------------------- complete
4627: Debug("process_request - returning 1");
4628: return 1;
4629: }
1.207 foxr 4630: #
4631: # Decipher encoded traffic
4632: # Parameters:
4633: # input - Encoded data.
4634: # Returns:
4635: # Decoded data or undef if encryption key was not yet negotiated.
4636: # Implicit input:
4637: # cipher - This global holds the negotiated encryption key.
4638: #
1.211 albertel 4639: sub decipher {
1.207 foxr 4640: my ($input) = @_;
4641: my $output = '';
1.212 foxr 4642:
4643:
1.207 foxr 4644: if($cipher) {
4645: my($enc, $enclength, $encinput) = split(/:/, $input);
4646: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
4647: $output .=
4648: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
4649: }
4650: return substr($output, 0, $enclength);
4651: } else {
4652: return undef;
4653: }
4654: }
4655:
4656: #
4657: # Register a command processor. This function is invoked to register a sub
4658: # to process a request. Once registered, the ProcessRequest sub can automatically
4659: # dispatch requests to an appropriate sub, and do the top level validity checking
4660: # as well:
4661: # - Is the keyword recognized.
4662: # - Is the proper client type attempting the request.
4663: # - Is the request encrypted if it has to be.
4664: # Parameters:
4665: # $request_name - Name of the request being registered.
4666: # This is the command request that will match
4667: # against the hash keywords to lookup the information
4668: # associated with the dispatch information.
4669: # $procedure - Reference to a sub to call to process the request.
4670: # All subs get called as follows:
4671: # Procedure($cmd, $tail, $replyfd, $key)
4672: # $cmd - the actual keyword that invoked us.
4673: # $tail - the tail of the request that invoked us.
4674: # $replyfd- File descriptor connected to the client
4675: # $must_encode - True if the request must be encoded to be good.
4676: # $client_ok - True if it's ok for a client to request this.
4677: # $manager_ok - True if it's ok for a manager to request this.
4678: # Side effects:
4679: # - On success, the Dispatcher hash has an entry added for the key $RequestName
4680: # - On failure, the program will die as it's a bad internal bug to try to
4681: # register a duplicate command handler.
4682: #
1.211 albertel 4683: sub register_handler {
1.212 foxr 4684: my ($request_name,$procedure,$must_encode, $client_ok,$manager_ok) = @_;
1.207 foxr 4685:
4686: # Don't allow duplication#
4687:
4688: if (defined $Dispatcher{$request_name}) {
4689: die "Attempting to define a duplicate request handler for $request_name\n";
4690: }
4691: # Build the client type mask:
4692:
4693: my $client_type_mask = 0;
4694: if($client_ok) {
4695: $client_type_mask |= $CLIENT_OK;
4696: }
4697: if($manager_ok) {
4698: $client_type_mask |= $MANAGER_OK;
4699: }
4700:
4701: # Enter the hash:
4702:
4703: my @entry = ($procedure, $must_encode, $client_type_mask);
4704:
4705: $Dispatcher{$request_name} = \@entry;
4706:
4707: }
4708:
4709:
4710: #------------------------------------------------------------------
4711:
4712:
4713:
4714:
1.141 foxr 4715: #
1.96 foxr 4716: # Convert an error return code from lcpasswd to a string value.
4717: #
4718: sub lcpasswdstrerror {
4719: my $ErrorCode = shift;
1.97 foxr 4720: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
1.96 foxr 4721: return "lcpasswd Unrecognized error return value ".$ErrorCode;
4722: } else {
1.98 foxr 4723: return $passwderrors[$ErrorCode];
1.96 foxr 4724: }
4725: }
4726:
1.97 foxr 4727: #
4728: # Convert an error return code from lcuseradd to a string value:
4729: #
4730: sub lcuseraddstrerror {
4731: my $ErrorCode = shift;
4732: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
4733: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
4734: } else {
1.98 foxr 4735: return $adderrors[$ErrorCode];
1.97 foxr 4736: }
4737: }
4738:
1.23 harris41 4739: # grabs exception and records it to log before exiting
4740: sub catchexception {
1.27 albertel 4741: my ($error)=@_;
1.25 www 4742: $SIG{'QUIT'}='DEFAULT';
4743: $SIG{__DIE__}='DEFAULT';
1.165 albertel 4744: &status("Catching exception");
1.190 albertel 4745: &logthis("<font color='red'>CRITICAL: "
1.134 albertel 4746: ."ABNORMAL EXIT. Child $$ for server $thisserver died through "
1.27 albertel 4747: ."a crash with this error msg->[$error]</font>");
1.57 www 4748: &logthis('Famous last words: '.$status.' - '.$lastlog);
1.27 albertel 4749: if ($client) { print $client "error: $error\n"; }
1.59 www 4750: $server->close();
1.27 albertel 4751: die($error);
1.23 harris41 4752: }
1.63 www 4753: sub timeout {
1.165 albertel 4754: &status("Handling Timeout");
1.190 albertel 4755: &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
1.63 www 4756: &catchexception('Timeout');
4757: }
1.22 harris41 4758: # -------------------------------- Set signal handlers to record abnormal exits
4759:
1.226 foxr 4760:
1.22 harris41 4761: $SIG{'QUIT'}=\&catchexception;
4762: $SIG{__DIE__}=\&catchexception;
4763:
1.81 matthew 4764: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
1.95 harris41 4765: &status("Read loncapa.conf and loncapa_apache.conf");
4766: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
1.141 foxr 4767: %perlvar=%{$perlvarref};
1.80 harris41 4768: undef $perlvarref;
1.19 www 4769:
1.35 harris41 4770: # ----------------------------- Make sure this process is running from user=www
4771: my $wwwid=getpwnam('www');
4772: if ($wwwid!=$<) {
1.134 albertel 4773: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
4774: my $subj="LON: $currenthostid User ID mismatch";
1.37 harris41 4775: system("echo 'User ID mismatch. lond must be run as user www.' |\
1.35 harris41 4776: mailto $emailto -s '$subj' > /dev/null");
4777: exit 1;
4778: }
4779:
1.19 www 4780: # --------------------------------------------- Check if other instance running
4781:
4782: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
4783:
4784: if (-e $pidfile) {
4785: my $lfh=IO::File->new("$pidfile");
4786: my $pide=<$lfh>;
4787: chomp($pide);
1.29 harris41 4788: if (kill 0 => $pide) { die "already running"; }
1.19 www 4789: }
1.1 albertel 4790:
4791: # ------------------------------------------------------------- Read hosts file
4792:
4793:
4794:
4795: # establish SERVER socket, bind and listen.
4796: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
4797: Type => SOCK_STREAM,
4798: Proto => 'tcp',
4799: Reuse => 1,
4800: Listen => 10 )
1.29 harris41 4801: or die "making socket: $@\n";
1.1 albertel 4802:
4803: # --------------------------------------------------------- Do global variables
4804:
4805: # global variables
4806:
1.134 albertel 4807: my %children = (); # keys are current child process IDs
1.1 albertel 4808:
4809: sub REAPER { # takes care of dead children
4810: $SIG{CHLD} = \&REAPER;
1.165 albertel 4811: &status("Handling child death");
1.178 foxr 4812: my $pid;
4813: do {
4814: $pid = waitpid(-1,&WNOHANG());
4815: if (defined($children{$pid})) {
4816: &logthis("Child $pid died");
4817: delete($children{$pid});
1.183 albertel 4818: } elsif ($pid > 0) {
1.178 foxr 4819: &logthis("Unknown Child $pid died");
4820: }
4821: } while ( $pid > 0 );
4822: foreach my $child (keys(%children)) {
4823: $pid = waitpid($child,&WNOHANG());
4824: if ($pid > 0) {
4825: &logthis("Child $child - $pid looks like we missed it's death");
4826: delete($children{$pid});
4827: }
1.176 albertel 4828: }
1.165 albertel 4829: &status("Finished Handling child death");
1.1 albertel 4830: }
4831:
4832: sub HUNTSMAN { # signal handler for SIGINT
1.165 albertel 4833: &status("Killing children (INT)");
1.1 albertel 4834: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
4835: kill 'INT' => keys %children;
1.59 www 4836: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.1 albertel 4837: my $execdir=$perlvar{'lonDaemons'};
4838: unlink("$execdir/logs/lond.pid");
1.190 albertel 4839: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
1.165 albertel 4840: &status("Done killing children");
1.1 albertel 4841: exit; # clean up with dignity
4842: }
4843:
4844: sub HUPSMAN { # signal handler for SIGHUP
4845: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
1.165 albertel 4846: &status("Killing children for restart (HUP)");
1.1 albertel 4847: kill 'INT' => keys %children;
1.59 www 4848: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.190 albertel 4849: &logthis("<font color='red'>CRITICAL: Restarting</font>");
1.134 albertel 4850: my $execdir=$perlvar{'lonDaemons'};
1.30 harris41 4851: unlink("$execdir/logs/lond.pid");
1.165 albertel 4852: &status("Restarting self (HUP)");
1.1 albertel 4853: exec("$execdir/lond"); # here we go again
4854: }
4855:
1.144 foxr 4856: #
1.148 foxr 4857: # Kill off hashes that describe the host table prior to re-reading it.
4858: # Hashes affected are:
1.200 matthew 4859: # %hostid, %hostdom %hostip %hostdns.
1.148 foxr 4860: #
4861: sub KillHostHashes {
4862: foreach my $key (keys %hostid) {
4863: delete $hostid{$key};
4864: }
4865: foreach my $key (keys %hostdom) {
4866: delete $hostdom{$key};
4867: }
4868: foreach my $key (keys %hostip) {
4869: delete $hostip{$key};
4870: }
1.200 matthew 4871: foreach my $key (keys %hostdns) {
4872: delete $hostdns{$key};
4873: }
1.148 foxr 4874: }
4875: #
4876: # Read in the host table from file and distribute it into the various hashes:
4877: #
4878: # - %hostid - Indexed by IP, the loncapa hostname.
4879: # - %hostdom - Indexed by loncapa hostname, the domain.
4880: # - %hostip - Indexed by hostid, the Ip address of the host.
4881: sub ReadHostTable {
4882:
4883: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
1.200 matthew 4884: my $myloncapaname = $perlvar{'lonHostID'};
4885: Debug("My loncapa name is : $myloncapaname");
1.296 albertel 4886: my %name_to_ip;
1.148 foxr 4887: while (my $configline=<CONFIG>) {
1.277 albertel 4888: if ($configline !~ /^\s*\#/ && $configline !~ /^\s*$/ ) {
4889: my ($id,$domain,$role,$name)=split(/:/,$configline);
4890: $name=~s/\s//g;
1.296 albertel 4891: my $ip;
4892: if (!exists($name_to_ip{$name})) {
4893: $ip = gethostbyname($name);
4894: if (!$ip || length($ip) ne 4) {
4895: &logthis("Skipping host $id name $name no IP found\n");
4896: next;
4897: }
4898: $ip=inet_ntoa($ip);
4899: $name_to_ip{$name} = $ip;
4900: } else {
4901: $ip = $name_to_ip{$name};
1.277 albertel 4902: }
1.200 matthew 4903: $hostid{$ip}=$id; # LonCAPA name of host by IP.
4904: $hostdom{$id}=$domain; # LonCAPA domain name of host.
1.307 albertel 4905: $hostname{$id}=$name; # LonCAPA name -> DNS name
1.277 albertel 4906: $hostip{$id}=$ip; # IP address of host.
1.200 matthew 4907: $hostdns{$name} = $id; # LonCAPA name of host by DNS.
4908:
4909: if ($id eq $perlvar{'lonHostID'}) {
4910: Debug("Found me in the host table: $name");
4911: $thisserver=$name;
4912: }
1.178 foxr 4913: }
1.148 foxr 4914: }
4915: close(CONFIG);
4916: }
4917: #
4918: # Reload the Apache daemon's state.
1.150 foxr 4919: # This is done by invoking /home/httpd/perl/apachereload
4920: # a setuid perl script that can be root for us to do this job.
1.148 foxr 4921: #
4922: sub ReloadApache {
1.150 foxr 4923: my $execdir = $perlvar{'lonDaemons'};
4924: my $script = $execdir."/apachereload";
4925: system($script);
1.148 foxr 4926: }
4927:
4928: #
1.144 foxr 4929: # Called in response to a USR2 signal.
4930: # - Reread hosts.tab
4931: # - All children connected to hosts that were removed from hosts.tab
4932: # are killed via SIGINT
4933: # - All children connected to previously existing hosts are sent SIGUSR1
4934: # - Our internal hosts hash is updated to reflect the new contents of
4935: # hosts.tab causing connections from hosts added to hosts.tab to
4936: # now be honored.
4937: #
4938: sub UpdateHosts {
1.165 albertel 4939: &status("Reload hosts.tab");
1.147 foxr 4940: logthis('<font color="blue"> Updating connections </font>');
1.148 foxr 4941: #
4942: # The %children hash has the set of IP's we currently have children
4943: # on. These need to be matched against records in the hosts.tab
4944: # Any ip's no longer in the table get killed off they correspond to
4945: # either dropped or changed hosts. Note that the re-read of the table
4946: # will take care of new and changed hosts as connections come into being.
4947:
4948:
4949: KillHostHashes;
4950: ReadHostTable;
4951:
4952: foreach my $child (keys %children) {
4953: my $childip = $children{$child};
4954: if(!$hostid{$childip}) {
1.149 foxr 4955: logthis('<font color="blue"> UpdateHosts killing child '
4956: ." $child for ip $childip </font>");
1.148 foxr 4957: kill('INT', $child);
1.149 foxr 4958: } else {
4959: logthis('<font color="green"> keeping child for ip '
4960: ." $childip (pid=$child) </font>");
1.148 foxr 4961: }
4962: }
4963: ReloadApache;
1.165 albertel 4964: &status("Finished reloading hosts.tab");
1.144 foxr 4965: }
4966:
1.148 foxr 4967:
1.57 www 4968: sub checkchildren {
1.165 albertel 4969: &status("Checking on the children (sending signals)");
1.57 www 4970: &initnewstatus();
4971: &logstatus();
4972: &logthis('Going to check on the children');
1.134 albertel 4973: my $docdir=$perlvar{'lonDocRoot'};
1.61 harris41 4974: foreach (sort keys %children) {
1.221 albertel 4975: #sleep 1;
1.57 www 4976: unless (kill 'USR1' => $_) {
4977: &logthis ('Child '.$_.' is dead');
4978: &logstatus($$.' is dead');
1.221 albertel 4979: delete($children{$_});
1.57 www 4980: }
1.61 harris41 4981: }
1.63 www 4982: sleep 5;
1.212 foxr 4983: $SIG{ALRM} = sub { Debug("timeout");
4984: die "timeout"; };
1.113 albertel 4985: $SIG{__DIE__} = 'DEFAULT';
1.165 albertel 4986: &status("Checking on the children (waiting for reports)");
1.63 www 4987: foreach (sort keys %children) {
4988: unless (-e "$docdir/lon-status/londchld/$_.txt") {
1.113 albertel 4989: eval {
4990: alarm(300);
1.63 www 4991: &logthis('Child '.$_.' did not respond');
1.67 albertel 4992: kill 9 => $_;
1.131 albertel 4993: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
4994: #$subj="LON: $currenthostid killed lond process $_";
4995: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
4996: #$execdir=$perlvar{'lonDaemons'};
4997: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
1.221 albertel 4998: delete($children{$_});
1.113 albertel 4999: alarm(0);
5000: }
1.63 www 5001: }
5002: }
1.113 albertel 5003: $SIG{ALRM} = 'DEFAULT';
1.155 albertel 5004: $SIG{__DIE__} = \&catchexception;
1.165 albertel 5005: &status("Finished checking children");
1.221 albertel 5006: &logthis('Finished Checking children');
1.57 www 5007: }
5008:
1.1 albertel 5009: # --------------------------------------------------------------------- Logging
5010:
5011: sub logthis {
5012: my $message=shift;
5013: my $execdir=$perlvar{'lonDaemons'};
5014: my $fh=IO::File->new(">>$execdir/logs/lond.log");
5015: my $now=time;
5016: my $local=localtime($now);
1.58 www 5017: $lastlog=$local.': '.$message;
1.1 albertel 5018: print $fh "$local ($$): $message\n";
5019: }
5020:
1.77 foxr 5021: # ------------------------- Conditional log if $DEBUG true.
5022: sub Debug {
5023: my $message = shift;
5024: if($DEBUG) {
5025: &logthis($message);
5026: }
5027: }
1.161 foxr 5028:
5029: #
5030: # Sub to do replies to client.. this gives a hook for some
5031: # debug tracing too:
5032: # Parameters:
5033: # fd - File open on client.
5034: # reply - Text to send to client.
5035: # request - Original request from client.
5036: #
5037: sub Reply {
1.192 foxr 5038: my ($fd, $reply, $request) = @_;
1.161 foxr 5039: print $fd $reply;
5040: Debug("Request was $request Reply was $reply");
5041:
1.212 foxr 5042: $Transactions++;
5043: }
5044:
5045:
5046: #
5047: # Sub to report a failure.
5048: # This function:
5049: # - Increments the failure statistic counters.
5050: # - Invokes Reply to send the error message to the client.
5051: # Parameters:
5052: # fd - File descriptor open on the client
5053: # reply - Reply text to emit.
5054: # request - The original request message (used by Reply
5055: # to debug if that's enabled.
5056: # Implicit outputs:
5057: # $Failures- The number of failures is incremented.
5058: # Reply (invoked here) sends a message to the
5059: # client:
5060: #
5061: sub Failure {
5062: my $fd = shift;
5063: my $reply = shift;
5064: my $request = shift;
5065:
5066: $Failures++;
5067: Reply($fd, $reply, $request); # That's simple eh?
1.161 foxr 5068: }
1.57 www 5069: # ------------------------------------------------------------------ Log status
5070:
5071: sub logstatus {
1.178 foxr 5072: &status("Doing logging");
5073: my $docdir=$perlvar{'lonDocRoot'};
5074: {
5075: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
1.200 matthew 5076: print $fh $status."\n".$lastlog."\n".time."\n$keymode";
1.178 foxr 5077: $fh->close();
5078: }
1.221 albertel 5079: &status("Finished $$.txt");
5080: {
5081: open(LOG,">>$docdir/lon-status/londstatus.txt");
5082: flock(LOG,LOCK_EX);
5083: print LOG $$."\t".$clientname."\t".$currenthostid."\t"
5084: .$status."\t".$lastlog."\t $keymode\n";
1.275 albertel 5085: flock(LOG,LOCK_UN);
1.221 albertel 5086: close(LOG);
5087: }
1.178 foxr 5088: &status("Finished logging");
1.57 www 5089: }
5090:
5091: sub initnewstatus {
5092: my $docdir=$perlvar{'lonDocRoot'};
5093: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
5094: my $now=time;
5095: my $local=localtime($now);
5096: print $fh "LOND status $local - parent $$\n\n";
1.64 www 5097: opendir(DIR,"$docdir/lon-status/londchld");
1.134 albertel 5098: while (my $filename=readdir(DIR)) {
1.64 www 5099: unlink("$docdir/lon-status/londchld/$filename");
5100: }
5101: closedir(DIR);
1.57 www 5102: }
5103:
5104: # -------------------------------------------------------------- Status setting
5105:
5106: sub status {
5107: my $what=shift;
5108: my $now=time;
5109: my $local=localtime($now);
1.178 foxr 5110: $status=$local.': '.$what;
5111: $0='lond: '.$what.' '.$local;
1.57 www 5112: }
1.11 www 5113:
1.1 albertel 5114: # ----------------------------------------------------------- Send USR1 to lonc
5115:
5116: sub reconlonc {
5117: my $peerfile=shift;
5118: &logthis("Trying to reconnect for $peerfile");
5119: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
5120: if (my $fh=IO::File->new("$loncfile")) {
5121: my $loncpid=<$fh>;
5122: chomp($loncpid);
5123: if (kill 0 => $loncpid) {
5124: &logthis("lonc at pid $loncpid responding, sending USR1");
5125: kill USR1 => $loncpid;
5126: } else {
1.9 www 5127: &logthis(
1.190 albertel 5128: "<font color='red'>CRITICAL: "
1.9 www 5129: ."lonc at pid $loncpid not responding, giving up</font>");
1.1 albertel 5130: }
5131: } else {
1.190 albertel 5132: &logthis('<font color="red">CRITICAL: lonc not running, giving up</font>');
1.1 albertel 5133: }
5134: }
5135:
5136: # -------------------------------------------------- Non-critical communication
1.11 www 5137:
1.1 albertel 5138: sub subreply {
5139: my ($cmd,$server)=@_;
1.307 albertel 5140: my $peerfile="$perlvar{'lonSockDir'}/".$hostname{$server};
1.1 albertel 5141: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
5142: Type => SOCK_STREAM,
5143: Timeout => 10)
5144: or return "con_lost";
1.307 albertel 5145: print $sclient "sethost:$server:$cmd\n";
1.1 albertel 5146: my $answer=<$sclient>;
5147: chomp($answer);
5148: if (!$answer) { $answer="con_lost"; }
5149: return $answer;
5150: }
5151:
5152: sub reply {
5153: my ($cmd,$server)=@_;
5154: my $answer;
1.115 albertel 5155: if ($server ne $currenthostid) {
1.1 albertel 5156: $answer=subreply($cmd,$server);
5157: if ($answer eq 'con_lost') {
5158: $answer=subreply("ping",$server);
5159: if ($answer ne $server) {
1.115 albertel 5160: &logthis("sub reply: answer != server answer is $answer, server is $server");
1.307 albertel 5161: &reconlonc("$perlvar{'lonSockDir'}/".$hostname{$server});
1.1 albertel 5162: }
5163: $answer=subreply($cmd,$server);
5164: }
5165: } else {
5166: $answer='self_reply';
5167: }
5168: return $answer;
5169: }
5170:
1.13 www 5171: # -------------------------------------------------------------- Talk to lonsql
5172:
1.234 foxr 5173: sub sql_reply {
1.12 harris41 5174: my ($cmd)=@_;
1.234 foxr 5175: my $answer=&sub_sql_reply($cmd);
5176: if ($answer eq 'con_lost') { $answer=&sub_sql_reply($cmd); }
1.12 harris41 5177: return $answer;
5178: }
5179:
1.234 foxr 5180: sub sub_sql_reply {
1.12 harris41 5181: my ($cmd)=@_;
5182: my $unixsock="mysqlsock";
5183: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
5184: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
5185: Type => SOCK_STREAM,
5186: Timeout => 10)
5187: or return "con_lost";
1.319 www 5188: print $sclient "$cmd:$currentdomainid\n";
1.12 harris41 5189: my $answer=<$sclient>;
5190: chomp($answer);
5191: if (!$answer) { $answer="con_lost"; }
5192: return $answer;
5193: }
5194:
1.1 albertel 5195: # --------------------------------------- Is this the home server of an author?
1.11 www 5196:
1.1 albertel 5197: sub ishome {
5198: my $author=shift;
5199: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
5200: my ($udom,$uname)=split(/\//,$author);
5201: my $proname=propath($udom,$uname);
5202: if (-e $proname) {
5203: return 'owner';
5204: } else {
5205: return 'not_owner';
5206: }
5207: }
5208:
5209: # ======================================================= Continue main program
5210: # ---------------------------------------------------- Fork once and dissociate
5211:
1.134 albertel 5212: my $fpid=fork;
1.1 albertel 5213: exit if $fpid;
1.29 harris41 5214: die "Couldn't fork: $!" unless defined ($fpid);
1.1 albertel 5215:
1.29 harris41 5216: POSIX::setsid() or die "Can't start new session: $!";
1.1 albertel 5217:
5218: # ------------------------------------------------------- Write our PID on disk
5219:
1.134 albertel 5220: my $execdir=$perlvar{'lonDaemons'};
1.1 albertel 5221: open (PIDSAVE,">$execdir/logs/lond.pid");
5222: print PIDSAVE "$$\n";
5223: close(PIDSAVE);
1.190 albertel 5224: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
1.57 www 5225: &status('Starting');
1.1 albertel 5226:
1.106 foxr 5227:
1.1 albertel 5228:
5229: # ----------------------------------------------------- Install signal handlers
5230:
1.57 www 5231:
1.1 albertel 5232: $SIG{CHLD} = \&REAPER;
5233: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
5234: $SIG{HUP} = \&HUPSMAN;
1.57 www 5235: $SIG{USR1} = \&checkchildren;
1.144 foxr 5236: $SIG{USR2} = \&UpdateHosts;
1.106 foxr 5237:
1.148 foxr 5238: # Read the host hashes:
5239:
5240: ReadHostTable;
1.106 foxr 5241:
1.286 albertel 5242: my $dist=`$perlvar{'lonDaemons'}/distprobe`;
5243:
1.106 foxr 5244: # --------------------------------------------------------------
5245: # Accept connections. When a connection comes in, it is validated
5246: # and if good, a child process is created to process transactions
5247: # along the connection.
5248:
1.1 albertel 5249: while (1) {
1.165 albertel 5250: &status('Starting accept');
1.106 foxr 5251: $client = $server->accept() or next;
1.165 albertel 5252: &status('Accepted '.$client.' off to spawn');
1.106 foxr 5253: make_new_child($client);
1.165 albertel 5254: &status('Finished spawning');
1.1 albertel 5255: }
5256:
1.212 foxr 5257: sub make_new_child {
5258: my $pid;
5259: # my $cipher; # Now global
5260: my $sigset;
1.178 foxr 5261:
1.212 foxr 5262: $client = shift;
5263: &status('Starting new child '.$client);
5264: &logthis('<font color="green"> Attempting to start child ('.$client.
5265: ")</font>");
5266: # block signal for fork
5267: $sigset = POSIX::SigSet->new(SIGINT);
5268: sigprocmask(SIG_BLOCK, $sigset)
5269: or die "Can't block SIGINT for fork: $!\n";
1.178 foxr 5270:
1.212 foxr 5271: die "fork: $!" unless defined ($pid = fork);
1.178 foxr 5272:
1.212 foxr 5273: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
5274: # connection liveness.
1.178 foxr 5275:
1.212 foxr 5276: #
5277: # Figure out who we're talking to so we can record the peer in
5278: # the pid hash.
5279: #
5280: my $caller = getpeername($client);
5281: my ($port,$iaddr);
5282: if (defined($caller) && length($caller) > 0) {
5283: ($port,$iaddr)=unpack_sockaddr_in($caller);
5284: } else {
5285: &logthis("Unable to determine who caller was, getpeername returned nothing");
5286: }
5287: if (defined($iaddr)) {
5288: $clientip = inet_ntoa($iaddr);
5289: Debug("Connected with $clientip");
5290: } else {
5291: &logthis("Unable to determine clientip");
5292: $clientip='Unavailable';
5293: }
5294:
5295: if ($pid) {
5296: # Parent records the child's birth and returns.
5297: sigprocmask(SIG_UNBLOCK, $sigset)
5298: or die "Can't unblock SIGINT for fork: $!\n";
5299: $children{$pid} = $clientip;
5300: &status('Started child '.$pid);
5301: return;
5302: } else {
5303: # Child can *not* return from this subroutine.
5304: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
5305: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
5306: #don't get intercepted
5307: $SIG{USR1}= \&logstatus;
5308: $SIG{ALRM}= \&timeout;
5309: $lastlog='Forked ';
5310: $status='Forked';
1.178 foxr 5311:
1.212 foxr 5312: # unblock signals
5313: sigprocmask(SIG_UNBLOCK, $sigset)
5314: or die "Can't unblock SIGINT for fork: $!\n";
1.178 foxr 5315:
1.212 foxr 5316: # my $tmpsnum=0; # Now global
5317: #---------------------------------------------------- kerberos 5 initialization
5318: &Authen::Krb5::init_context();
1.297 raeburn 5319: unless (($dist eq 'fedora4') || ($dist eq 'suse9.3')) {
1.286 albertel 5320: &Authen::Krb5::init_ets();
5321: }
1.209 albertel 5322:
1.212 foxr 5323: &status('Accepted connection');
5324: # =============================================================================
5325: # do something with the connection
5326: # -----------------------------------------------------------------------------
5327: # see if we know client and 'check' for spoof IP by ineffective challenge
1.178 foxr 5328:
1.212 foxr 5329: ReadManagerTable; # May also be a manager!!
5330:
1.278 albertel 5331: my $outsideip=$clientip;
5332: if ($clientip eq '127.0.0.1') {
5333: $outsideip=$hostip{$perlvar{'lonHostID'}};
5334: }
5335:
5336: my $clientrec=($hostid{$outsideip} ne undef);
5337: my $ismanager=($managers{$outsideip} ne undef);
1.212 foxr 5338: $clientname = "[unknonwn]";
5339: if($clientrec) { # Establish client type.
5340: $ConnectionType = "client";
1.278 albertel 5341: $clientname = $hostid{$outsideip};
1.212 foxr 5342: if($ismanager) {
5343: $ConnectionType = "both";
5344: }
5345: } else {
5346: $ConnectionType = "manager";
1.278 albertel 5347: $clientname = $managers{$outsideip};
1.212 foxr 5348: }
5349: my $clientok;
1.178 foxr 5350:
1.212 foxr 5351: if ($clientrec || $ismanager) {
5352: &status("Waiting for init from $clientip $clientname");
5353: &logthis('<font color="yellow">INFO: Connection, '.
5354: $clientip.
5355: " ($clientname) connection type = $ConnectionType </font>" );
5356: &status("Connecting $clientip ($clientname))");
5357: my $remotereq=<$client>;
5358: chomp($remotereq);
5359: Debug("Got init: $remotereq");
1.337 albertel 5360:
1.212 foxr 5361: if ($remotereq =~ /^init/) {
5362: &sethost("sethost:$perlvar{'lonHostID'}");
5363: #
5364: # If the remote is attempting a local init... give that a try:
5365: #
5366: my ($i, $inittype) = split(/:/, $remotereq);
1.209 albertel 5367:
1.212 foxr 5368: # If the connection type is ssl, but I didn't get my
5369: # certificate files yet, then I'll drop back to
5370: # insecure (if allowed).
5371:
5372: if($inittype eq "ssl") {
5373: my ($ca, $cert) = lonssl::CertificateFile;
5374: my $kfile = lonssl::KeyFile;
5375: if((!$ca) ||
5376: (!$cert) ||
5377: (!$kfile)) {
5378: $inittype = ""; # This forces insecure attempt.
5379: &logthis("<font color=\"blue\"> Certificates not "
5380: ."installed -- trying insecure auth</font>");
1.224 foxr 5381: } else { # SSL certificates are in place so
1.212 foxr 5382: } # Leave the inittype alone.
5383: }
5384:
5385: if($inittype eq "local") {
5386: my $key = LocalConnection($client, $remotereq);
5387: if($key) {
5388: Debug("Got local key $key");
5389: $clientok = 1;
5390: my $cipherkey = pack("H32", $key);
5391: $cipher = new IDEA($cipherkey);
5392: print $client "ok:local\n";
5393: &logthis('<font color="green"'
5394: . "Successful local authentication </font>");
5395: $keymode = "local"
1.178 foxr 5396: } else {
1.212 foxr 5397: Debug("Failed to get local key");
5398: $clientok = 0;
5399: shutdown($client, 3);
5400: close $client;
1.178 foxr 5401: }
1.212 foxr 5402: } elsif ($inittype eq "ssl") {
5403: my $key = SSLConnection($client);
5404: if ($key) {
5405: $clientok = 1;
5406: my $cipherkey = pack("H32", $key);
5407: $cipher = new IDEA($cipherkey);
5408: &logthis('<font color="green">'
5409: ."Successfull ssl authentication with $clientname </font>");
5410: $keymode = "ssl";
5411:
1.178 foxr 5412: } else {
1.212 foxr 5413: $clientok = 0;
5414: close $client;
1.178 foxr 5415: }
1.212 foxr 5416:
5417: } else {
5418: my $ok = InsecureConnection($client);
5419: if($ok) {
5420: $clientok = 1;
5421: &logthis('<font color="green">'
5422: ."Successful insecure authentication with $clientname </font>");
5423: print $client "ok\n";
5424: $keymode = "insecure";
1.178 foxr 5425: } else {
1.212 foxr 5426: &logthis('<font color="yellow">'
5427: ."Attempted insecure connection disallowed </font>");
5428: close $client;
5429: $clientok = 0;
1.178 foxr 5430:
5431: }
5432: }
1.212 foxr 5433: } else {
5434: &logthis(
5435: "<font color='blue'>WARNING: "
5436: ."$clientip failed to initialize: >$remotereq< </font>");
5437: &status('No init '.$clientip);
5438: }
5439:
5440: } else {
5441: &logthis(
5442: "<font color='blue'>WARNING: Unknown client $clientip</font>");
5443: &status('Hung up on '.$clientip);
5444: }
5445:
5446: if ($clientok) {
5447: # ---------------- New known client connecting, could mean machine online again
5448:
5449: foreach my $id (keys(%hostip)) {
5450: if ($hostip{$id} ne $clientip ||
5451: $hostip{$currenthostid} eq $clientip) {
5452: # no need to try to do recon's to myself
5453: next;
5454: }
1.307 albertel 5455: &reconlonc("$perlvar{'lonSockDir'}/".$hostname{$id});
1.212 foxr 5456: }
5457: &logthis("<font color='green'>Established connection: $clientname</font>");
5458: &status('Will listen to '.$clientname);
5459: # ------------------------------------------------------------ Process requests
5460: my $keep_going = 1;
5461: my $user_input;
5462: while(($user_input = get_request) && $keep_going) {
5463: alarm(120);
5464: Debug("Main: Got $user_input\n");
5465: $keep_going = &process_request($user_input);
1.178 foxr 5466: alarm(0);
1.212 foxr 5467: &status('Listening to '.$clientname." ($keymode)");
1.161 foxr 5468: }
1.212 foxr 5469:
1.59 www 5470: # --------------------------------------------- client unknown or fishy, refuse
1.212 foxr 5471: } else {
1.161 foxr 5472: print $client "refused\n";
5473: $client->close();
1.190 albertel 5474: &logthis("<font color='blue'>WARNING: "
1.161 foxr 5475: ."Rejected client $clientip, closing connection</font>");
5476: }
1.212 foxr 5477: }
1.161 foxr 5478:
1.1 albertel 5479: # =============================================================================
1.161 foxr 5480:
1.190 albertel 5481: &logthis("<font color='red'>CRITICAL: "
1.161 foxr 5482: ."Disconnect from $clientip ($clientname)</font>");
5483:
5484:
5485: # this exit is VERY important, otherwise the child will become
5486: # a producer of more and more children, forking yourself into
5487: # process death.
5488: exit;
1.106 foxr 5489:
1.78 foxr 5490: }
1.261 foxr 5491: #
5492: # Determine if a user is an author for the indicated domain.
5493: #
5494: # Parameters:
5495: # domain - domain to check in .
5496: # user - Name of user to check.
5497: #
5498: # Return:
5499: # 1 - User is an author for domain.
5500: # 0 - User is not an author for domain.
5501: sub is_author {
5502: my ($domain, $user) = @_;
5503:
5504: &Debug("is_author: $user @ $domain");
5505:
5506: my $hashref = &tie_user_hash($domain, $user, "roles",
5507: &GDBM_READER());
5508:
5509: # Author role should show up as a key /domain/_au
1.78 foxr 5510:
1.321 albertel 5511: my $key = "/$domain/_au";
5512: my $value;
5513: if (defined($hashref)) {
5514: $value = $hashref->{$key};
5515: }
1.78 foxr 5516:
1.261 foxr 5517: if(defined($value)) {
5518: &Debug("$user @ $domain is an author");
5519: }
5520:
5521: return defined($value);
5522: }
1.78 foxr 5523: #
5524: # Checks to see if the input roleput request was to set
5525: # an author role. If so, invokes the lchtmldir script to set
5526: # up a correct public_html
5527: # Parameters:
5528: # request - The request sent to the rolesput subchunk.
5529: # We're looking for /domain/_au
5530: # domain - The domain in which the user is having roles doctored.
5531: # user - Name of the user for which the role is being put.
5532: # authtype - The authentication type associated with the user.
5533: #
1.289 albertel 5534: sub manage_permissions {
1.192 foxr 5535: my ($request, $domain, $user, $authtype) = @_;
1.78 foxr 5536:
1.261 foxr 5537: &Debug("manage_permissions: $request $domain $user $authtype");
5538:
1.78 foxr 5539: # See if the request is of the form /$domain/_au
1.289 albertel 5540: if($request =~ /^(\/\Q$domain\E\/_au)$/) { # It's an author rolesput...
1.78 foxr 5541: my $execdir = $perlvar{'lonDaemons'};
5542: my $userhome= "/home/$user" ;
1.134 albertel 5543: &logthis("system $execdir/lchtmldir $userhome $user $authtype");
1.261 foxr 5544: &Debug("Setting homedir permissions for $userhome");
1.78 foxr 5545: system("$execdir/lchtmldir $userhome $user $authtype");
5546: }
5547: }
1.222 foxr 5548:
5549:
5550: #
5551: # Return the full path of a user password file, whether it exists or not.
5552: # Parameters:
5553: # domain - Domain in which the password file lives.
5554: # user - name of the user.
5555: # Returns:
5556: # Full passwd path:
5557: #
5558: sub password_path {
5559: my ($domain, $user) = @_;
1.264 albertel 5560: return &propath($domain, $user).'/passwd';
1.222 foxr 5561: }
5562:
5563: # Password Filename
5564: # Returns the path to a passwd file given domain and user... only if
5565: # it exists.
5566: # Parameters:
5567: # domain - Domain in which to search.
5568: # user - username.
5569: # Returns:
5570: # - If the password file exists returns its path.
5571: # - If the password file does not exist, returns undefined.
5572: #
5573: sub password_filename {
5574: my ($domain, $user) = @_;
5575:
5576: Debug ("PasswordFilename called: dom = $domain user = $user");
5577:
5578: my $path = &password_path($domain, $user);
5579: Debug("PasswordFilename got path: $path");
5580: if(-e $path) {
5581: return $path;
5582: } else {
5583: return undef;
5584: }
5585: }
5586:
5587: #
5588: # Rewrite the contents of the user's passwd file.
5589: # Parameters:
5590: # domain - domain of the user.
5591: # name - User's name.
5592: # contents - New contents of the file.
5593: # Returns:
5594: # 0 - Failed.
5595: # 1 - Success.
5596: #
5597: sub rewrite_password_file {
5598: my ($domain, $user, $contents) = @_;
5599:
5600: my $file = &password_filename($domain, $user);
5601: if (defined $file) {
5602: my $pf = IO::File->new(">$file");
5603: if($pf) {
5604: print $pf "$contents\n";
5605: return 1;
5606: } else {
5607: return 0;
5608: }
5609: } else {
5610: return 0;
5611: }
5612:
5613: }
5614:
1.78 foxr 5615: #
1.222 foxr 5616: # get_auth_type - Determines the authorization type of a user in a domain.
1.78 foxr 5617:
5618: # Returns the authorization type or nouser if there is no such user.
5619: #
1.222 foxr 5620: sub get_auth_type
1.78 foxr 5621: {
1.192 foxr 5622:
5623: my ($domain, $user) = @_;
1.78 foxr 5624:
1.222 foxr 5625: Debug("get_auth_type( $domain, $user ) \n");
1.78 foxr 5626: my $proname = &propath($domain, $user);
5627: my $passwdfile = "$proname/passwd";
5628: if( -e $passwdfile ) {
5629: my $pf = IO::File->new($passwdfile);
5630: my $realpassword = <$pf>;
5631: chomp($realpassword);
1.79 foxr 5632: Debug("Password info = $realpassword\n");
1.78 foxr 5633: my ($authtype, $contentpwd) = split(/:/, $realpassword);
1.79 foxr 5634: Debug("Authtype = $authtype, content = $contentpwd\n");
1.259 raeburn 5635: return "$authtype:$contentpwd";
1.224 foxr 5636: } else {
1.79 foxr 5637: Debug("Returning nouser");
1.78 foxr 5638: return "nouser";
5639: }
1.1 albertel 5640: }
5641:
1.220 foxr 5642: #
5643: # Validate a user given their domain, name and password. This utility
5644: # function is used by both AuthenticateHandler and ChangePasswordHandler
5645: # to validate the login credentials of a user.
5646: # Parameters:
5647: # $domain - The domain being logged into (this is required due to
5648: # the capability for multihomed systems.
5649: # $user - The name of the user being validated.
5650: # $password - The user's propoposed password.
5651: #
5652: # Returns:
5653: # 1 - The domain,user,pasword triplet corresponds to a valid
5654: # user.
5655: # 0 - The domain,user,password triplet is not a valid user.
5656: #
5657: sub validate_user {
5658: my ($domain, $user, $password) = @_;
5659:
5660:
5661: # Why negative ~pi you may well ask? Well this function is about
5662: # authentication, and therefore very important to get right.
5663: # I've initialized the flag that determines whether or not I've
5664: # validated correctly to a value it's not supposed to get.
5665: # At the end of this function. I'll ensure that it's not still that
5666: # value so we don't just wind up returning some accidental value
5667: # as a result of executing an unforseen code path that
1.249 foxr 5668: # did not set $validated. At the end of valid execution paths,
5669: # validated shoule be 1 for success or 0 for failuer.
1.220 foxr 5670:
5671: my $validated = -3.14159;
5672:
5673: # How we authenticate is determined by the type of authentication
5674: # the user has been assigned. If the authentication type is
5675: # "nouser", the user does not exist so we will return 0.
5676:
1.222 foxr 5677: my $contents = &get_auth_type($domain, $user);
1.220 foxr 5678: my ($howpwd, $contentpwd) = split(/:/, $contents);
5679:
5680: my $null = pack("C",0); # Used by kerberos auth types.
5681:
5682: if ($howpwd ne 'nouser') {
5683:
5684: if($howpwd eq "internal") { # Encrypted is in local password file.
5685: $validated = (crypt($password, $contentpwd) eq $contentpwd);
5686: }
5687: elsif ($howpwd eq "unix") { # User is a normal unix user.
5688: $contentpwd = (getpwnam($user))[1];
5689: if($contentpwd) {
5690: if($contentpwd eq 'x') { # Shadow password file...
5691: my $pwauth_path = "/usr/local/sbin/pwauth";
5692: open PWAUTH, "|$pwauth_path" or
5693: die "Cannot invoke authentication";
5694: print PWAUTH "$user\n$password\n";
5695: close PWAUTH;
5696: $validated = ! $?;
5697:
5698: } else { # Passwords in /etc/passwd.
5699: $validated = (crypt($password,
5700: $contentpwd) eq $contentpwd);
5701: }
5702: } else {
5703: $validated = 0;
5704: }
5705: }
5706: elsif ($howpwd eq "krb4") { # user is in kerberos 4 auth. domain.
5707: if(! ($password =~ /$null/) ) {
5708: my $k4error = &Authen::Krb4::get_pw_in_tkt($user,
5709: "",
5710: $contentpwd,,
5711: 'krbtgt',
5712: $contentpwd,
5713: 1,
5714: $password);
5715: if(!$k4error) {
5716: $validated = 1;
1.224 foxr 5717: } else {
1.220 foxr 5718: $validated = 0;
5719: &logthis('krb4: '.$user.', '.$contentpwd.', '.
5720: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
5721: }
1.224 foxr 5722: } else {
1.220 foxr 5723: $validated = 0; # Password has a match with null.
5724: }
1.224 foxr 5725: } elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain.
1.220 foxr 5726: if(!($password =~ /$null/)) { # Null password not allowed.
5727: my $krbclient = &Authen::Krb5::parse_name($user.'@'
5728: .$contentpwd);
5729: my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd;
5730: my $krbserver = &Authen::Krb5::parse_name($krbservice);
5731: my $credentials= &Authen::Krb5::cc_default();
5732: $credentials->initialize($krbclient);
1.270 matthew 5733: my $krbreturn = &Authen::Krb5::get_in_tkt_with_password($krbclient,
1.220 foxr 5734: $krbserver,
5735: $password,
5736: $credentials);
5737: $validated = ($krbreturn == 1);
1.224 foxr 5738: } else {
1.220 foxr 5739: $validated = 0;
5740: }
1.224 foxr 5741: } elsif ($howpwd eq "localauth") {
1.220 foxr 5742: # Authenticate via installation specific authentcation method:
5743: $validated = &localauth::localauth($user,
5744: $password,
5745: $contentpwd);
1.224 foxr 5746: } else { # Unrecognized auth is also bad.
1.220 foxr 5747: $validated = 0;
5748: }
5749: } else {
5750: $validated = 0;
5751: }
5752: #
5753: # $validated has the correct stat of the authentication:
5754: #
5755:
5756: unless ($validated != -3.14159) {
1.249 foxr 5757: # I >really really< want to know if this happens.
5758: # since it indicates that user authentication is badly
5759: # broken in some code path.
5760: #
5761: die "ValidateUser - failed to set the value of validated $domain, $user $password";
1.220 foxr 5762: }
5763: return $validated;
5764: }
5765:
5766:
1.84 albertel 5767: sub addline {
5768: my ($fname,$hostid,$ip,$newline)=@_;
5769: my $contents;
5770: my $found=0;
5771: my $expr='^'.$hostid.':'.$ip.':';
5772: $expr =~ s/\./\\\./g;
1.134 albertel 5773: my $sh;
1.84 albertel 5774: if ($sh=IO::File->new("$fname.subscription")) {
5775: while (my $subline=<$sh>) {
5776: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
5777: }
5778: $sh->close();
5779: }
5780: $sh=IO::File->new(">$fname.subscription");
5781: if ($contents) { print $sh $contents; }
5782: if ($newline) { print $sh $newline; }
5783: $sh->close();
5784: return $found;
1.86 www 5785: }
5786:
1.234 foxr 5787: sub get_chat {
1.324 raeburn 5788: my ($cdom,$cname,$udom,$uname,$group)=@_;
1.310 albertel 5789:
1.87 www 5790: my @entries=();
1.324 raeburn 5791: my $namespace = 'nohist_chatroom';
5792: my $namespace_inroom = 'nohist_inchatroom';
1.335 albertel 5793: if ($group ne '') {
1.324 raeburn 5794: $namespace .= '_'.$group;
5795: $namespace_inroom .= '_'.$group;
5796: }
5797: my $hashref = &tie_user_hash($cdom, $cname, $namespace,
1.310 albertel 5798: &GDBM_READER());
5799: if ($hashref) {
5800: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
1.311 albertel 5801: &untie_user_hash($hashref);
1.123 www 5802: }
1.124 www 5803: my @participants=();
1.134 albertel 5804: my $cutoff=time-60;
1.324 raeburn 5805: $hashref = &tie_user_hash($cdom, $cname, $namespace_inroom,
1.310 albertel 5806: &GDBM_WRCREAT());
5807: if ($hashref) {
5808: $hashref->{$uname.':'.$udom}=time;
5809: foreach my $user (sort(keys(%$hashref))) {
5810: if ($hashref->{$user}>$cutoff) {
5811: push(@participants, 'active_participant:'.$user);
1.123 www 5812: }
5813: }
1.311 albertel 5814: &untie_user_hash($hashref);
1.86 www 5815: }
1.124 www 5816: return (@participants,@entries);
1.86 www 5817: }
5818:
1.234 foxr 5819: sub chat_add {
1.324 raeburn 5820: my ($cdom,$cname,$newchat,$group)=@_;
1.88 albertel 5821: my @entries=();
1.142 www 5822: my $time=time;
1.324 raeburn 5823: my $namespace = 'nohist_chatroom';
5824: my $logfile = 'chatroom.log';
1.335 albertel 5825: if ($group ne '') {
1.324 raeburn 5826: $namespace .= '_'.$group;
5827: $logfile = 'chatroom_'.$group.'.log';
5828: }
5829: my $hashref = &tie_user_hash($cdom, $cname, $namespace,
1.310 albertel 5830: &GDBM_WRCREAT());
5831: if ($hashref) {
5832: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
1.88 albertel 5833: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
5834: my ($thentime,$idnum)=split(/\_/,$lastid);
5835: my $newid=$time.'_000000';
5836: if ($thentime==$time) {
5837: $idnum=~s/^0+//;
5838: $idnum++;
5839: $idnum=substr('000000'.$idnum,-6,6);
5840: $newid=$time.'_'.$idnum;
5841: }
1.310 albertel 5842: $hashref->{$newid}=$newchat;
1.88 albertel 5843: my $expired=$time-3600;
1.310 albertel 5844: foreach my $comment (keys(%$hashref)) {
5845: my ($thistime) = ($comment=~/(\d+)\_/);
1.88 albertel 5846: if ($thistime<$expired) {
1.310 albertel 5847: delete $hashref->{$comment};
1.88 albertel 5848: }
5849: }
1.310 albertel 5850: {
5851: my $proname=&propath($cdom,$cname);
1.324 raeburn 5852: if (open(CHATLOG,">>$proname/$logfile")) {
1.310 albertel 5853: print CHATLOG ("$time:".&unescape($newchat)."\n");
5854: }
5855: close(CHATLOG);
1.142 www 5856: }
1.311 albertel 5857: &untie_user_hash($hashref);
1.86 www 5858: }
1.84 albertel 5859: }
5860:
5861: sub unsub {
5862: my ($fname,$clientip)=@_;
5863: my $result;
1.188 foxr 5864: my $unsubs = 0; # Number of successful unsubscribes:
5865:
5866:
5867: # An old way subscriptions were handled was to have a
5868: # subscription marker file:
5869:
5870: Debug("Attempting unlink of $fname.$clientname");
1.161 foxr 5871: if (unlink("$fname.$clientname")) {
1.188 foxr 5872: $unsubs++; # Successful unsub via marker file.
5873: }
5874:
5875: # The more modern way to do it is to have a subscription list
5876: # file:
5877:
1.84 albertel 5878: if (-e "$fname.subscription") {
1.161 foxr 5879: my $found=&addline($fname,$clientname,$clientip,'');
1.188 foxr 5880: if ($found) {
5881: $unsubs++;
5882: }
5883: }
5884:
5885: # If either or both of these mechanisms succeeded in unsubscribing a
5886: # resource we can return ok:
5887:
5888: if($unsubs) {
5889: $result = "ok\n";
1.84 albertel 5890: } else {
1.188 foxr 5891: $result = "not_subscribed\n";
1.84 albertel 5892: }
1.188 foxr 5893:
1.84 albertel 5894: return $result;
5895: }
5896:
1.101 www 5897: sub currentversion {
5898: my $fname=shift;
5899: my $version=-1;
5900: my $ulsdir='';
5901: if ($fname=~/^(.+)\/[^\/]+$/) {
5902: $ulsdir=$1;
5903: }
1.114 albertel 5904: my ($fnamere1,$fnamere2);
5905: # remove version if already specified
1.101 www 5906: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
1.114 albertel 5907: # get the bits that go before and after the version number
5908: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
5909: $fnamere1=$1;
5910: $fnamere2='.'.$2;
5911: }
1.101 www 5912: if (-e $fname) { $version=1; }
5913: if (-e $ulsdir) {
1.134 albertel 5914: if(-d $ulsdir) {
5915: if (opendir(LSDIR,$ulsdir)) {
5916: my $ulsfn;
5917: while ($ulsfn=readdir(LSDIR)) {
1.101 www 5918: # see if this is a regular file (ignore links produced earlier)
1.134 albertel 5919: my $thisfile=$ulsdir.'/'.$ulsfn;
5920: unless (-l $thisfile) {
1.160 www 5921: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
1.134 albertel 5922: if ($1>$version) { $version=$1; }
5923: }
5924: }
5925: }
5926: closedir(LSDIR);
5927: $version++;
5928: }
5929: }
5930: }
5931: return $version;
1.101 www 5932: }
5933:
5934: sub thisversion {
5935: my $fname=shift;
5936: my $version=-1;
5937: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
5938: $version=$1;
5939: }
5940: return $version;
5941: }
5942:
1.84 albertel 5943: sub subscribe {
5944: my ($userinput,$clientip)=@_;
5945: my $result;
1.293 albertel 5946: my ($cmd,$fname)=split(/:/,$userinput,2);
1.84 albertel 5947: my $ownership=&ishome($fname);
5948: if ($ownership eq 'owner') {
1.101 www 5949: # explitly asking for the current version?
5950: unless (-e $fname) {
5951: my $currentversion=¤tversion($fname);
5952: if (&thisversion($fname)==$currentversion) {
5953: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
5954: my $root=$1;
5955: my $extension=$2;
5956: symlink($root.'.'.$extension,
5957: $root.'.'.$currentversion.'.'.$extension);
1.102 www 5958: unless ($extension=~/\.meta$/) {
5959: symlink($root.'.'.$extension.'.meta',
5960: $root.'.'.$currentversion.'.'.$extension.'.meta');
5961: }
1.101 www 5962: }
5963: }
5964: }
1.84 albertel 5965: if (-e $fname) {
5966: if (-d $fname) {
5967: $result="directory\n";
5968: } else {
1.161 foxr 5969: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
1.134 albertel 5970: my $now=time;
1.161 foxr 5971: my $found=&addline($fname,$clientname,$clientip,
5972: "$clientname:$clientip:$now\n");
1.84 albertel 5973: if ($found) { $result="$fname\n"; }
5974: # if they were subscribed to only meta data, delete that
5975: # subscription, when you subscribe to a file you also get
5976: # the metadata
5977: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
5978: $fname=~s/\/home\/httpd\/html\/res/raw/;
5979: $fname="http://$thisserver/".$fname;
5980: $result="$fname\n";
5981: }
5982: } else {
5983: $result="not_found\n";
5984: }
5985: } else {
5986: $result="rejected\n";
5987: }
5988: return $result;
5989: }
1.287 foxr 5990: # Change the passwd of a unix user. The caller must have
5991: # first verified that the user is a loncapa user.
5992: #
5993: # Parameters:
5994: # user - Unix user name to change.
5995: # pass - New password for the user.
5996: # Returns:
5997: # ok - if success
5998: # other - Some meaningfule error message string.
5999: # NOTE:
6000: # invokes a setuid script to change the passwd.
6001: sub change_unix_password {
6002: my ($user, $pass) = @_;
6003:
6004: &Debug("change_unix_password");
6005: my $execdir=$perlvar{'lonDaemons'};
6006: &Debug("Opening lcpasswd pipeline");
6007: my $pf = IO::File->new("|$execdir/lcpasswd > "
6008: ."$perlvar{'lonDaemons'}"
6009: ."/logs/lcpasswd.log");
6010: print $pf "$user\n$pass\n$pass\n";
6011: close $pf;
6012: my $err = $?;
6013: return ($err < @passwderrors) ? $passwderrors[$err] :
6014: "pwchange_falure - unknown error";
6015:
6016:
6017: }
6018:
1.91 albertel 6019:
6020: sub make_passwd_file {
1.98 foxr 6021: my ($uname, $umode,$npass,$passfilename)=@_;
1.91 albertel 6022: my $result="ok\n";
6023: if ($umode eq 'krb4' or $umode eq 'krb5') {
6024: {
6025: my $pf = IO::File->new(">$passfilename");
1.261 foxr 6026: if ($pf) {
6027: print $pf "$umode:$npass\n";
6028: } else {
6029: $result = "pass_file_failed_error";
6030: }
1.91 albertel 6031: }
6032: } elsif ($umode eq 'internal') {
6033: my $salt=time;
6034: $salt=substr($salt,6,2);
6035: my $ncpass=crypt($npass,$salt);
6036: {
6037: &Debug("Creating internal auth");
6038: my $pf = IO::File->new(">$passfilename");
1.261 foxr 6039: if($pf) {
6040: print $pf "internal:$ncpass\n";
6041: } else {
6042: $result = "pass_file_failed_error";
6043: }
1.91 albertel 6044: }
6045: } elsif ($umode eq 'localauth') {
6046: {
6047: my $pf = IO::File->new(">$passfilename");
1.261 foxr 6048: if($pf) {
6049: print $pf "localauth:$npass\n";
6050: } else {
6051: $result = "pass_file_failed_error";
6052: }
1.91 albertel 6053: }
6054: } elsif ($umode eq 'unix') {
6055: {
1.186 foxr 6056: #
6057: # Don't allow the creation of privileged accounts!!! that would
6058: # be real bad!!!
6059: #
6060: my $uid = getpwnam($uname);
6061: if((defined $uid) && ($uid == 0)) {
6062: &logthis(">>>Attempted to create privilged account blocked");
6063: return "no_priv_account_error\n";
6064: }
6065:
1.223 foxr 6066: my $execpath ="$perlvar{'lonDaemons'}/"."lcuseradd";
1.224 foxr 6067:
6068: my $lc_error_file = $execdir."/tmp/lcuseradd".$$.".status";
1.91 albertel 6069: {
6070: &Debug("Executing external: ".$execpath);
1.98 foxr 6071: &Debug("user = ".$uname.", Password =". $npass);
1.132 matthew 6072: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
1.91 albertel 6073: print $se "$uname\n";
6074: print $se "$npass\n";
6075: print $se "$npass\n";
1.223 foxr 6076: print $se "$lc_error_file\n"; # Status -> unique file.
1.97 foxr 6077: }
1.285 foxr 6078: if (-r $lc_error_file) {
6079: &Debug("Opening error file: $lc_error_file");
6080: my $error = IO::File->new("< $lc_error_file");
6081: my $useraddok = <$error>;
6082: $error->close;
6083: unlink($lc_error_file);
6084:
6085: chomp $useraddok;
6086:
6087: if($useraddok > 0) {
6088: my $error_text = &lcuseraddstrerror($useraddok);
6089: &logthis("Failed lcuseradd: $error_text");
6090: $result = "lcuseradd_failed:$error_text\n";
6091: } else {
6092: my $pf = IO::File->new(">$passfilename");
6093: if($pf) {
6094: print $pf "unix:\n";
6095: } else {
6096: $result = "pass_file_failed_error";
6097: }
6098: }
1.224 foxr 6099: } else {
1.285 foxr 6100: &Debug("Could not locate lcuseradd error: $lc_error_file");
6101: $result="bug_lcuseradd_no_output_file";
1.91 albertel 6102: }
6103: }
6104: } elsif ($umode eq 'none') {
6105: {
1.223 foxr 6106: my $pf = IO::File->new("> $passfilename");
1.261 foxr 6107: if($pf) {
6108: print $pf "none:\n";
6109: } else {
6110: $result = "pass_file_failed_error";
6111: }
1.91 albertel 6112: }
6113: } else {
6114: $result="auth_mode_error\n";
6115: }
6116: return $result;
1.121 albertel 6117: }
6118:
1.265 albertel 6119: sub convert_photo {
6120: my ($start,$dest)=@_;
6121: system("convert $start $dest");
6122: }
6123:
1.121 albertel 6124: sub sethost {
6125: my ($remotereq) = @_;
6126: my (undef,$hostid)=split(/:/,$remotereq);
1.322 albertel 6127: # ignore sethost if we are already correct
6128: if ($hostid eq $currenthostid) {
6129: return 'ok';
6130: }
6131:
1.121 albertel 6132: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
6133: if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
1.200 matthew 6134: $currenthostid =$hostid;
1.121 albertel 6135: $currentdomainid=$hostdom{$hostid};
6136: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
6137: } else {
6138: &logthis("Requested host id $hostid not an alias of ".
6139: $perlvar{'lonHostID'}." refusing connection");
6140: return 'unable_to_set';
6141: }
6142: return 'ok';
6143: }
6144:
6145: sub version {
6146: my ($userinput)=@_;
6147: $remoteVERSION=(split(/:/,$userinput))[1];
6148: return "version:$VERSION";
1.127 albertel 6149: }
1.178 foxr 6150:
1.128 albertel 6151: #There is a copy of this in lonnet.pm
1.127 albertel 6152: sub userload {
6153: my $numusers=0;
6154: {
6155: opendir(LONIDS,$perlvar{'lonIDsDir'});
6156: my $filename;
6157: my $curtime=time;
6158: while ($filename=readdir(LONIDS)) {
6159: if ($filename eq '.' || $filename eq '..') {next;}
1.138 albertel 6160: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
1.159 albertel 6161: if ($curtime-$mtime < 1800) { $numusers++; }
1.127 albertel 6162: }
6163: closedir(LONIDS);
6164: }
6165: my $userloadpercent=0;
6166: my $maxuserload=$perlvar{'lonUserLoadLim'};
6167: if ($maxuserload) {
1.129 albertel 6168: $userloadpercent=100*$numusers/$maxuserload;
1.127 albertel 6169: }
1.130 albertel 6170: $userloadpercent=sprintf("%.2f",$userloadpercent);
1.127 albertel 6171: return $userloadpercent;
1.91 albertel 6172: }
6173:
1.205 raeburn 6174: # Routines for serializing arrays and hashes (copies from lonnet)
6175:
6176: sub array2str {
6177: my (@array) = @_;
6178: my $result=&arrayref2str(\@array);
6179: $result=~s/^__ARRAY_REF__//;
6180: $result=~s/__END_ARRAY_REF__$//;
6181: return $result;
6182: }
6183:
6184: sub arrayref2str {
6185: my ($arrayref) = @_;
6186: my $result='__ARRAY_REF__';
6187: foreach my $elem (@$arrayref) {
6188: if(ref($elem) eq 'ARRAY') {
6189: $result.=&arrayref2str($elem).'&';
6190: } elsif(ref($elem) eq 'HASH') {
6191: $result.=&hashref2str($elem).'&';
6192: } elsif(ref($elem)) {
6193: #print("Got a ref of ".(ref($elem))." skipping.");
6194: } else {
6195: $result.=&escape($elem).'&';
6196: }
6197: }
6198: $result=~s/\&$//;
6199: $result .= '__END_ARRAY_REF__';
6200: return $result;
6201: }
6202:
6203: sub hash2str {
6204: my (%hash) = @_;
6205: my $result=&hashref2str(\%hash);
6206: $result=~s/^__HASH_REF__//;
6207: $result=~s/__END_HASH_REF__$//;
6208: return $result;
6209: }
6210:
6211: sub hashref2str {
6212: my ($hashref)=@_;
6213: my $result='__HASH_REF__';
6214: foreach (sort(keys(%$hashref))) {
6215: if (ref($_) eq 'ARRAY') {
6216: $result.=&arrayref2str($_).'=';
6217: } elsif (ref($_) eq 'HASH') {
6218: $result.=&hashref2str($_).'=';
6219: } elsif (ref($_)) {
6220: $result.='=';
6221: #print("Got a ref of ".(ref($_))." skipping.");
6222: } else {
6223: if ($_) {$result.=&escape($_).'=';} else { last; }
6224: }
6225:
6226: if(ref($hashref->{$_}) eq 'ARRAY') {
6227: $result.=&arrayref2str($hashref->{$_}).'&';
6228: } elsif(ref($hashref->{$_}) eq 'HASH') {
6229: $result.=&hashref2str($hashref->{$_}).'&';
6230: } elsif(ref($hashref->{$_})) {
6231: $result.='&';
6232: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
6233: } else {
6234: $result.=&escape($hashref->{$_}).'&';
6235: }
6236: }
6237: $result=~s/\&$//;
6238: $result .= '__END_HASH_REF__';
6239: return $result;
6240: }
1.200 matthew 6241:
1.61 harris41 6242: # ----------------------------------- POD (plain old documentation, CPAN style)
6243:
6244: =head1 NAME
6245:
6246: lond - "LON Daemon" Server (port "LOND" 5663)
6247:
6248: =head1 SYNOPSIS
6249:
1.74 harris41 6250: Usage: B<lond>
6251:
6252: Should only be run as user=www. This is a command-line script which
6253: is invoked by B<loncron>. There is no expectation that a typical user
6254: will manually start B<lond> from the command-line. (In other words,
6255: DO NOT START B<lond> YOURSELF.)
1.61 harris41 6256:
6257: =head1 DESCRIPTION
6258:
1.74 harris41 6259: There are two characteristics associated with the running of B<lond>,
6260: PROCESS MANAGEMENT (starting, stopping, handling child processes)
6261: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
6262: subscriptions, etc). These are described in two large
6263: sections below.
6264:
6265: B<PROCESS MANAGEMENT>
6266:
1.61 harris41 6267: Preforker - server who forks first. Runs as a daemon. HUPs.
6268: Uses IDEA encryption
6269:
1.74 harris41 6270: B<lond> forks off children processes that correspond to the other servers
6271: in the network. Management of these processes can be done at the
6272: parent process level or the child process level.
6273:
6274: B<logs/lond.log> is the location of log messages.
6275:
6276: The process management is now explained in terms of linux shell commands,
6277: subroutines internal to this code, and signal assignments:
6278:
6279: =over 4
6280:
6281: =item *
6282:
6283: PID is stored in B<logs/lond.pid>
6284:
6285: This is the process id number of the parent B<lond> process.
6286:
6287: =item *
6288:
6289: SIGTERM and SIGINT
6290:
6291: Parent signal assignment:
6292: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
6293:
6294: Child signal assignment:
6295: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
6296: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
6297: to restart a new child.)
6298:
6299: Command-line invocations:
6300: B<kill> B<-s> SIGTERM I<PID>
6301: B<kill> B<-s> SIGINT I<PID>
6302:
6303: Subroutine B<HUNTSMAN>:
6304: This is only invoked for the B<lond> parent I<PID>.
6305: This kills all the children, and then the parent.
6306: The B<lonc.pid> file is cleared.
6307:
6308: =item *
6309:
6310: SIGHUP
6311:
6312: Current bug:
6313: This signal can only be processed the first time
6314: on the parent process. Subsequent SIGHUP signals
6315: have no effect.
6316:
6317: Parent signal assignment:
6318: $SIG{HUP} = \&HUPSMAN;
6319:
6320: Child signal assignment:
6321: none (nothing happens)
6322:
6323: Command-line invocations:
6324: B<kill> B<-s> SIGHUP I<PID>
6325:
6326: Subroutine B<HUPSMAN>:
6327: This is only invoked for the B<lond> parent I<PID>,
6328: This kills all the children, and then the parent.
6329: The B<lond.pid> file is cleared.
6330:
6331: =item *
6332:
6333: SIGUSR1
6334:
6335: Parent signal assignment:
6336: $SIG{USR1} = \&USRMAN;
6337:
6338: Child signal assignment:
6339: $SIG{USR1}= \&logstatus;
6340:
6341: Command-line invocations:
6342: B<kill> B<-s> SIGUSR1 I<PID>
6343:
6344: Subroutine B<USRMAN>:
6345: When invoked for the B<lond> parent I<PID>,
6346: SIGUSR1 is sent to all the children, and the status of
6347: each connection is logged.
1.144 foxr 6348:
6349: =item *
6350:
6351: SIGUSR2
6352:
6353: Parent Signal assignment:
6354: $SIG{USR2} = \&UpdateHosts
6355:
6356: Child signal assignment:
6357: NONE
6358:
1.74 harris41 6359:
6360: =item *
6361:
6362: SIGCHLD
6363:
6364: Parent signal assignment:
6365: $SIG{CHLD} = \&REAPER;
6366:
6367: Child signal assignment:
6368: none
6369:
6370: Command-line invocations:
6371: B<kill> B<-s> SIGCHLD I<PID>
6372:
6373: Subroutine B<REAPER>:
6374: This is only invoked for the B<lond> parent I<PID>.
6375: Information pertaining to the child is removed.
6376: The socket port is cleaned up.
6377:
6378: =back
6379:
6380: B<SERVER-SIDE ACTIVITIES>
6381:
6382: Server-side information can be accepted in an encrypted or non-encrypted
6383: method.
6384:
6385: =over 4
6386:
6387: =item ping
6388:
6389: Query a client in the hosts.tab table; "Are you there?"
6390:
6391: =item pong
6392:
6393: Respond to a ping query.
6394:
6395: =item ekey
6396:
6397: Read in encrypted key, make cipher. Respond with a buildkey.
6398:
6399: =item load
6400:
6401: Respond with CPU load based on a computation upon /proc/loadavg.
6402:
6403: =item currentauth
6404:
6405: Reply with current authentication information (only over an
6406: encrypted channel).
6407:
6408: =item auth
6409:
6410: Only over an encrypted channel, reply as to whether a user's
6411: authentication information can be validated.
6412:
6413: =item passwd
6414:
6415: Allow for a password to be set.
6416:
6417: =item makeuser
6418:
6419: Make a user.
6420:
6421: =item passwd
6422:
6423: Allow for authentication mechanism and password to be changed.
6424:
6425: =item home
1.61 harris41 6426:
1.74 harris41 6427: Respond to a question "are you the home for a given user?"
6428:
6429: =item update
6430:
6431: Update contents of a subscribed resource.
6432:
6433: =item unsubscribe
6434:
6435: The server is unsubscribing from a resource.
6436:
6437: =item subscribe
6438:
6439: The server is subscribing to a resource.
6440:
6441: =item log
6442:
6443: Place in B<logs/lond.log>
6444:
6445: =item put
6446:
6447: stores hash in namespace
6448:
1.230 foxr 6449: =item rolesputy
1.74 harris41 6450:
6451: put a role into a user's environment
6452:
6453: =item get
6454:
6455: returns hash with keys from array
6456: reference filled in from namespace
6457:
6458: =item eget
6459:
6460: returns hash with keys from array
6461: reference filled in from namesp (encrypts the return communication)
6462:
6463: =item rolesget
6464:
6465: get a role from a user's environment
6466:
6467: =item del
6468:
6469: deletes keys out of array from namespace
6470:
6471: =item keys
6472:
6473: returns namespace keys
6474:
6475: =item dump
6476:
6477: dumps the complete (or key matching regexp) namespace into a hash
6478:
6479: =item store
6480:
6481: stores hash permanently
6482: for this url; hashref needs to be given and should be a \%hashname; the
6483: remaining args aren't required and if they aren't passed or are '' they will
6484: be derived from the ENV
6485:
6486: =item restore
6487:
6488: returns a hash for a given url
6489:
6490: =item querysend
6491:
6492: Tells client about the lonsql process that has been launched in response
6493: to a sent query.
6494:
6495: =item queryreply
6496:
6497: Accept information from lonsql and make appropriate storage in temporary
6498: file space.
6499:
6500: =item idput
6501:
6502: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
6503: for each student, defined perhaps by the institutional Registrar.)
6504:
6505: =item idget
6506:
6507: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
6508: for each student, defined perhaps by the institutional Registrar.)
6509:
6510: =item tmpput
6511:
6512: Accept and store information in temporary space.
6513:
6514: =item tmpget
6515:
6516: Send along temporarily stored information.
6517:
6518: =item ls
6519:
6520: List part of a user's directory.
6521:
1.135 foxr 6522: =item pushtable
6523:
6524: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
6525: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
6526: must be restored manually in case of a problem with the new table file.
6527: pushtable requires that the request be encrypted and validated via
6528: ValidateManager. The form of the command is:
6529: enc:pushtable tablename <tablecontents> \n
6530: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
6531: cleartext newline.
6532:
1.74 harris41 6533: =item Hanging up (exit or init)
6534:
6535: What to do when a client tells the server that they (the client)
6536: are leaving the network.
6537:
6538: =item unknown command
6539:
6540: If B<lond> is sent an unknown command (not in the list above),
6541: it replys to the client "unknown_cmd".
1.135 foxr 6542:
1.74 harris41 6543:
6544: =item UNKNOWN CLIENT
6545:
6546: If the anti-spoofing algorithm cannot verify the client,
6547: the client is rejected (with a "refused" message sent
6548: to the client, and the connection is closed.
6549:
6550: =back
1.61 harris41 6551:
6552: =head1 PREREQUISITES
6553:
6554: IO::Socket
6555: IO::File
6556: Apache::File
6557: POSIX
6558: Crypt::IDEA
6559: LWP::UserAgent()
6560: GDBM_File
6561: Authen::Krb4
1.91 albertel 6562: Authen::Krb5
1.61 harris41 6563:
6564: =head1 COREQUISITES
6565:
6566: =head1 OSNAMES
6567:
6568: linux
6569:
6570: =head1 SCRIPT CATEGORIES
6571:
6572: Server/Process
6573:
6574: =cut
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