Annotation of loncom/lond, revision 1.308
1.1 albertel 1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
1.60 www 4: #
1.308 ! albertel 5: # $Id: lond,v 1.307 2006/01/27 21:45:28 albertel Exp $
1.60 www 6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
1.167 foxr 13: # the Free Software Foundation; either version 2 of the License, or
1.60 www 14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
1.178 foxr 23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
1.60 www 24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
1.161 foxr 27:
28:
1.60 www 29: # http://www.lon-capa.org/
30: #
1.54 harris41 31:
1.134 albertel 32: use strict;
1.80 harris41 33: use lib '/home/httpd/lib/perl/';
34: use LONCAPA::Configuration;
35:
1.1 albertel 36: use IO::Socket;
37: use IO::File;
1.126 albertel 38: #use Apache::File;
1.1 albertel 39: use Symbol;
40: use POSIX;
41: use Crypt::IDEA;
42: use LWP::UserAgent();
1.3 www 43: use GDBM_File;
44: use Authen::Krb4;
1.91 albertel 45: use Authen::Krb5;
1.49 albertel 46: use lib '/home/httpd/lib/perl/';
47: use localauth;
1.193 raeburn 48: use localenroll;
1.265 albertel 49: use localstudentphoto;
1.143 foxr 50: use File::Copy;
1.292 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:
1.308 ! albertel 62: my $VERSION='$Revision: 1.307 $'; #' stupid emacs
1.121 albertel 63: my $remoteVERSION;
1.214 foxr 64: my $currenthostid="default";
1.115 albertel 65: my $currentdomainid;
1.134 albertel 66:
67: my $client;
1.200 matthew 68: my $clientip; # IP address of client.
69: my $clientname; # LonCAPA name of client.
1.140 foxr 70:
1.134 albertel 71: my $server;
1.200 matthew 72: my $thisserver; # DNS of us.
73:
74: my $keymode;
1.198 foxr 75:
1.207 foxr 76: my $cipher; # Cipher key negotiated with client
77: my $tmpsnum = 0; # Id of tmpputs.
78:
1.178 foxr 79: #
80: # Connection type is:
81: # client - All client actions are allowed
82: # manager - only management functions allowed.
83: # both - Both management and client actions are allowed
84: #
1.161 foxr 85:
1.178 foxr 86: my $ConnectionType;
1.161 foxr 87:
1.200 matthew 88: my %hostid; # ID's for hosts in cluster by ip.
89: my %hostdom; # LonCAPA domain for hosts in cluster.
1.307 albertel 90: my %hostname; # DNSname -> ID's mapping.
1.200 matthew 91: my %hostip; # IPs for hosts in cluster.
92: my %hostdns; # ID's of hosts looked up by DNS name.
1.161 foxr 93:
1.178 foxr 94: my %managers; # Ip -> manager names
1.161 foxr 95:
1.178 foxr 96: my %perlvar; # Will have the apache conf defined perl vars.
1.134 albertel 97:
1.178 foxr 98: #
1.207 foxr 99: # The hash below is used for command dispatching, and is therefore keyed on the request keyword.
100: # Each element of the hash contains a reference to an array that contains:
101: # A reference to a sub that executes the request corresponding to the keyword.
102: # A flag that is true if the request must be encoded to be acceptable.
103: # A mask with bits as follows:
104: # CLIENT_OK - Set when the function is allowed by ordinary clients
105: # MANAGER_OK - Set when the function is allowed to manager clients.
106: #
107: my $CLIENT_OK = 1;
108: my $MANAGER_OK = 2;
109: my %Dispatcher;
110:
111:
112: #
1.178 foxr 113: # The array below are password error strings."
114: #
115: my $lastpwderror = 13; # Largest error number from lcpasswd.
116: my @passwderrors = ("ok",
1.287 foxr 117: "pwchange_failure - lcpasswd must be run as user 'www'",
118: "pwchange_failure - lcpasswd got incorrect number of arguments",
119: "pwchange_failure - lcpasswd did not get the right nubmer of input text lines",
120: "pwchange_failure - lcpasswd too many simultaneous pwd changes in progress",
121: "pwchange_failure - lcpasswd User does not exist.",
122: "pwchange_failure - lcpasswd Incorrect current passwd",
123: "pwchange_failure - lcpasswd Unable to su to root.",
124: "pwchange_failure - lcpasswd Cannot set new passwd.",
125: "pwchange_failure - lcpasswd Username has invalid characters",
126: "pwchange_failure - lcpasswd Invalid characters in password",
127: "pwchange_failure - lcpasswd User already exists",
128: "pwchange_failure - lcpasswd Something went wrong with user addition.",
129: "pwchange_failure - lcpasswd Password mismatch",
130: "pwchange_failure - lcpasswd Error filename is invalid");
1.97 foxr 131:
132:
1.178 foxr 133: # The array below are lcuseradd error strings.:
1.97 foxr 134:
1.178 foxr 135: my $lastadderror = 13;
136: my @adderrors = ("ok",
137: "User ID mismatch, lcuseradd must run as user www",
138: "lcuseradd Incorrect number of command line parameters must be 3",
139: "lcuseradd Incorrect number of stdinput lines, must be 3",
140: "lcuseradd Too many other simultaneous pwd changes in progress",
141: "lcuseradd User does not exist",
142: "lcuseradd Unable to make www member of users's group",
143: "lcuseradd Unable to su to root",
144: "lcuseradd Unable to set password",
145: "lcuseradd Usrname has invalid characters",
146: "lcuseradd Password has an invalid character",
147: "lcuseradd User already exists",
148: "lcuseradd Could not add user.",
149: "lcuseradd Password mismatch");
1.97 foxr 150:
1.96 foxr 151:
1.207 foxr 152:
153: #
154: # Statistics that are maintained and dislayed in the status line.
155: #
1.212 foxr 156: my $Transactions = 0; # Number of attempted transactions.
157: my $Failures = 0; # Number of transcations failed.
1.207 foxr 158:
159: # ResetStatistics:
160: # Resets the statistics counters:
161: #
162: sub ResetStatistics {
163: $Transactions = 0;
164: $Failures = 0;
165: }
166:
1.200 matthew 167: #------------------------------------------------------------------------
168: #
169: # LocalConnection
170: # Completes the formation of a locally authenticated connection.
171: # This function will ensure that the 'remote' client is really the
172: # local host. If not, the connection is closed, and the function fails.
173: # If so, initcmd is parsed for the name of a file containing the
174: # IDEA session key. The fie is opened, read, deleted and the session
175: # key returned to the caller.
176: #
177: # Parameters:
178: # $Socket - Socket open on client.
179: # $initcmd - The full text of the init command.
180: #
181: # Implicit inputs:
182: # $thisserver - Our DNS name.
183: #
184: # Returns:
185: # IDEA session key on success.
186: # undef on failure.
187: #
188: sub LocalConnection {
189: my ($Socket, $initcmd) = @_;
1.277 albertel 190: Debug("Attempting local connection: $initcmd client: $clientip me: $thisserver");
191: if($clientip ne "127.0.0.1") {
1.200 matthew 192: &logthis('<font color="red"> LocalConnection rejecting non local: '
1.277 albertel 193: ."$clientip ne $thisserver </font>");
1.200 matthew 194: close $Socket;
195: return undef;
1.224 foxr 196: } else {
1.200 matthew 197: chomp($initcmd); # Get rid of \n in filename.
198: my ($init, $type, $name) = split(/:/, $initcmd);
199: Debug(" Init command: $init $type $name ");
200:
201: # Require that $init = init, and $type = local: Otherwise
202: # the caller is insane:
203:
204: if(($init ne "init") && ($type ne "local")) {
205: &logthis('<font color = "red"> LocalConnection: caller is insane! '
206: ."init = $init, and type = $type </font>");
207: close($Socket);;
208: return undef;
209:
210: }
211: # Now get the key filename:
212:
213: my $IDEAKey = lonlocal::ReadKeyFile($name);
214: return $IDEAKey;
215: }
216: }
217: #------------------------------------------------------------------------------
218: #
219: # SSLConnection
220: # Completes the formation of an ssh authenticated connection. The
221: # socket is promoted to an ssl socket. If this promotion and the associated
222: # certificate exchange are successful, the IDEA key is generated and sent
223: # to the remote peer via the SSL tunnel. The IDEA key is also returned to
224: # the caller after the SSL tunnel is torn down.
225: #
226: # Parameters:
227: # Name Type Purpose
228: # $Socket IO::Socket::INET Plaintext socket.
229: #
230: # Returns:
231: # IDEA key on success.
232: # undef on failure.
233: #
234: sub SSLConnection {
235: my $Socket = shift;
236:
237: Debug("SSLConnection: ");
238: my $KeyFile = lonssl::KeyFile();
239: if(!$KeyFile) {
240: my $err = lonssl::LastError();
241: &logthis("<font color=\"red\"> CRITICAL"
242: ."Can't get key file $err </font>");
243: return undef;
244: }
245: my ($CACertificate,
246: $Certificate) = lonssl::CertificateFile();
247:
248:
249: # If any of the key, certificate or certificate authority
250: # certificate filenames are not defined, this can't work.
251:
252: if((!$Certificate) || (!$CACertificate)) {
253: my $err = lonssl::LastError();
254: &logthis("<font color=\"red\"> CRITICAL"
255: ."Can't get certificates: $err </font>");
256:
257: return undef;
258: }
259: Debug("Key: $KeyFile CA: $CACertificate Cert: $Certificate");
260:
261: # Indicate to our peer that we can procede with
262: # a transition to ssl authentication:
263:
264: print $Socket "ok:ssl\n";
265:
266: Debug("Approving promotion -> ssl");
267: # And do so:
268:
269: my $SSLSocket = lonssl::PromoteServerSocket($Socket,
270: $CACertificate,
271: $Certificate,
272: $KeyFile);
273: if(! ($SSLSocket) ) { # SSL socket promotion failed.
274: my $err = lonssl::LastError();
275: &logthis("<font color=\"red\"> CRITICAL "
276: ."SSL Socket promotion failed: $err </font>");
277: return undef;
278: }
279: Debug("SSL Promotion successful");
280:
281: #
282: # The only thing we'll use the socket for is to send the IDEA key
283: # to the peer:
284:
285: my $Key = lonlocal::CreateCipherKey();
286: print $SSLSocket "$Key\n";
287:
288: lonssl::Close($SSLSocket);
289:
290: Debug("Key exchange complete: $Key");
291:
292: return $Key;
293: }
294: #
295: # InsecureConnection:
296: # If insecure connections are allowd,
297: # exchange a challenge with the client to 'validate' the
298: # client (not really, but that's the protocol):
299: # We produce a challenge string that's sent to the client.
300: # The client must then echo the challenge verbatim to us.
301: #
302: # Parameter:
303: # Socket - Socket open on the client.
304: # Returns:
305: # 1 - success.
306: # 0 - failure (e.g.mismatch or insecure not allowed).
307: #
308: sub InsecureConnection {
309: my $Socket = shift;
310:
311: # Don't even start if insecure connections are not allowed.
312:
313: if(! $perlvar{londAllowInsecure}) { # Insecure connections not allowed.
314: return 0;
315: }
316:
317: # Fabricate a challenge string and send it..
318:
319: my $challenge = "$$".time; # pid + time.
320: print $Socket "$challenge\n";
321: &status("Waiting for challenge reply");
322:
323: my $answer = <$Socket>;
324: $answer =~s/\W//g;
325: if($challenge eq $answer) {
326: return 1;
1.224 foxr 327: } else {
1.200 matthew 328: logthis("<font color='blue'>WARNING client did not respond to challenge</font>");
329: &status("No challenge reqply");
330: return 0;
331: }
332:
333:
334: }
1.251 foxr 335: #
336: # Safely execute a command (as long as it's not a shel command and doesn
337: # not require/rely on shell escapes. The function operates by doing a
338: # a pipe based fork and capturing stdout and stderr from the pipe.
339: #
340: # Formal Parameters:
341: # $line - A line of text to be executed as a command.
342: # Returns:
343: # The output from that command. If the output is multiline the caller
344: # must know how to split up the output.
345: #
346: #
347: sub execute_command {
348: my ($line) = @_;
349: my @words = split(/\s/, $line); # Bust the command up into words.
350: my $output = "";
351:
352: my $pid = open(CHILD, "-|");
353:
354: if($pid) { # Parent process
355: Debug("In parent process for execute_command");
356: my @data = <CHILD>; # Read the child's outupt...
357: close CHILD;
358: foreach my $output_line (@data) {
359: Debug("Adding $output_line");
360: $output .= $output_line; # Presumably has a \n on it.
361: }
362:
363: } else { # Child process
364: close (STDERR);
365: open (STDERR, ">&STDOUT");# Combine stderr, and stdout...
366: exec(@words); # won't return.
367: }
368: return $output;
369: }
370:
1.200 matthew 371:
1.140 foxr 372: # GetCertificate: Given a transaction that requires a certificate,
373: # this function will extract the certificate from the transaction
374: # request. Note that at this point, the only concept of a certificate
375: # is the hostname to which we are connected.
376: #
377: # Parameter:
378: # request - The request sent by our client (this parameterization may
379: # need to change when we really use a certificate granting
380: # authority.
381: #
382: sub GetCertificate {
383: my $request = shift;
384:
385: return $clientip;
386: }
1.161 foxr 387:
1.178 foxr 388: #
389: # Return true if client is a manager.
390: #
391: sub isManager {
392: return (($ConnectionType eq "manager") || ($ConnectionType eq "both"));
393: }
394: #
395: # Return tru if client can do client functions
396: #
397: sub isClient {
398: return (($ConnectionType eq "client") || ($ConnectionType eq "both"));
399: }
1.161 foxr 400:
401:
1.156 foxr 402: #
403: # ReadManagerTable: Reads in the current manager table. For now this is
404: # done on each manager authentication because:
405: # - These authentications are not frequent
406: # - This allows dynamic changes to the manager table
407: # without the need to signal to the lond.
408: #
409: sub ReadManagerTable {
410:
411: # Clean out the old table first..
412:
1.166 foxr 413: foreach my $key (keys %managers) {
414: delete $managers{$key};
415: }
416:
417: my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
418: if (!open (MANAGERS, $tablename)) {
419: logthis('<font color="red">No manager table. Nobody can manage!!</font>');
420: return;
421: }
422: while(my $host = <MANAGERS>) {
423: chomp($host);
424: if ($host =~ "^#") { # Comment line.
425: next;
426: }
427: if (!defined $hostip{$host}) { # This is a non cluster member
1.161 foxr 428: # The entry is of the form:
429: # cluname:hostname
430: # cluname - A 'cluster hostname' is needed in order to negotiate
431: # the host key.
432: # hostname- The dns name of the host.
433: #
1.166 foxr 434: my($cluname, $dnsname) = split(/:/, $host);
435:
436: my $ip = gethostbyname($dnsname);
437: if(defined($ip)) { # bad names don't deserve entry.
438: my $hostip = inet_ntoa($ip);
439: $managers{$hostip} = $cluname;
440: logthis('<font color="green"> registering manager '.
441: "$dnsname as $cluname with $hostip </font>\n");
442: }
443: } else {
444: logthis('<font color="green"> existing host'." $host</font>\n");
445: $managers{$hostip{$host}} = $host; # Use info from cluster tab if clumemeber
446: }
447: }
1.156 foxr 448: }
1.140 foxr 449:
450: #
451: # ValidManager: Determines if a given certificate represents a valid manager.
452: # in this primitive implementation, the 'certificate' is
453: # just the connecting loncapa client name. This is checked
454: # against a valid client list in the configuration.
455: #
456: #
457: sub ValidManager {
458: my $certificate = shift;
459:
1.163 foxr 460: return isManager;
1.140 foxr 461: }
462: #
1.143 foxr 463: # CopyFile: Called as part of the process of installing a
464: # new configuration file. This function copies an existing
465: # file to a backup file.
466: # Parameters:
467: # oldfile - Name of the file to backup.
468: # newfile - Name of the backup file.
469: # Return:
470: # 0 - Failure (errno has failure reason).
471: # 1 - Success.
472: #
473: sub CopyFile {
1.192 foxr 474:
475: my ($oldfile, $newfile) = @_;
1.143 foxr 476:
1.281 matthew 477: if (! copy($oldfile,$newfile)) {
478: return 0;
1.143 foxr 479: }
1.281 matthew 480: chmod(0660, $newfile);
481: return 1;
1.143 foxr 482: }
1.157 foxr 483: #
484: # Host files are passed out with externally visible host IPs.
485: # If, for example, we are behind a fire-wall or NAT host, our
486: # internally visible IP may be different than the externally
487: # visible IP. Therefore, we always adjust the contents of the
488: # host file so that the entry for ME is the IP that we believe
489: # we have. At present, this is defined as the entry that
490: # DNS has for us. If by some chance we are not able to get a
491: # DNS translation for us, then we assume that the host.tab file
492: # is correct.
493: # BUGBUGBUG - in the future, we really should see if we can
494: # easily query the interface(s) instead.
495: # Parameter(s):
496: # contents - The contents of the host.tab to check.
497: # Returns:
498: # newcontents - The adjusted contents.
499: #
500: #
501: sub AdjustHostContents {
502: my $contents = shift;
503: my $adjusted;
504: my $me = $perlvar{'lonHostID'};
505:
1.166 foxr 506: foreach my $line (split(/\n/,$contents)) {
1.157 foxr 507: if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/))) {
508: chomp($line);
509: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
510: if ($id eq $me) {
1.166 foxr 511: my $ip = gethostbyname($name);
512: my $ipnew = inet_ntoa($ip);
513: $ip = $ipnew;
1.157 foxr 514: # Reconstruct the host line and append to adjusted:
515:
1.166 foxr 516: my $newline = "$id:$domain:$role:$name:$ip";
517: if($maxcon ne "") { # Not all hosts have loncnew tuning params
518: $newline .= ":$maxcon:$idleto:$mincon";
519: }
520: $adjusted .= $newline."\n";
1.157 foxr 521:
1.166 foxr 522: } else { # Not me, pass unmodified.
523: $adjusted .= $line."\n";
524: }
1.157 foxr 525: } else { # Blank or comment never re-written.
526: $adjusted .= $line."\n"; # Pass blanks and comments as is.
527: }
1.166 foxr 528: }
529: return $adjusted;
1.157 foxr 530: }
1.143 foxr 531: #
532: # InstallFile: Called to install an administrative file:
533: # - The file is created with <name>.tmp
534: # - The <name>.tmp file is then mv'd to <name>
535: # This lugubrious procedure is done to ensure that we are never without
536: # a valid, even if dated, version of the file regardless of who crashes
537: # and when the crash occurs.
538: #
539: # Parameters:
540: # Name of the file
541: # File Contents.
542: # Return:
543: # nonzero - success.
544: # 0 - failure and $! has an errno.
545: #
546: sub InstallFile {
1.192 foxr 547:
548: my ($Filename, $Contents) = @_;
1.143 foxr 549: my $TempFile = $Filename.".tmp";
550:
551: # Open the file for write:
552:
553: my $fh = IO::File->new("> $TempFile"); # Write to temp.
554: if(!(defined $fh)) {
555: &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
556: return 0;
557: }
558: # write the contents of the file:
559:
560: print $fh ($Contents);
561: $fh->close; # In case we ever have a filesystem w. locking
562:
563: chmod(0660, $TempFile);
564:
565: # Now we can move install the file in position.
566:
567: move($TempFile, $Filename);
568:
569: return 1;
570: }
1.200 matthew 571:
572:
1.169 foxr 573: #
574: # ConfigFileFromSelector: converts a configuration file selector
575: # (one of host or domain at this point) into a
576: # configuration file pathname.
577: #
578: # Parameters:
579: # selector - Configuration file selector.
580: # Returns:
581: # Full path to the file or undef if the selector is invalid.
582: #
583: sub ConfigFileFromSelector {
584: my $selector = shift;
585: my $tablefile;
586:
587: my $tabledir = $perlvar{'lonTabDir'}.'/';
588: if ($selector eq "hosts") {
589: $tablefile = $tabledir."hosts.tab";
590: } elsif ($selector eq "domain") {
591: $tablefile = $tabledir."domain.tab";
592: } else {
593: return undef;
594: }
595: return $tablefile;
1.143 foxr 596:
1.169 foxr 597: }
1.143 foxr 598: #
1.141 foxr 599: # PushFile: Called to do an administrative push of a file.
600: # - Ensure the file being pushed is one we support.
601: # - Backup the old file to <filename.saved>
602: # - Separate the contents of the new file out from the
603: # rest of the request.
604: # - Write the new file.
605: # Parameter:
606: # Request - The entire user request. This consists of a : separated
607: # string pushfile:tablename:contents.
608: # NOTE: The contents may have :'s in it as well making things a bit
609: # more interesting... but not much.
610: # Returns:
611: # String to send to client ("ok" or "refused" if bad file).
612: #
613: sub PushFile {
614: my $request = shift;
615: my ($command, $filename, $contents) = split(":", $request, 3);
616:
617: # At this point in time, pushes for only the following tables are
618: # supported:
619: # hosts.tab ($filename eq host).
620: # domain.tab ($filename eq domain).
621: # Construct the destination filename or reject the request.
622: #
623: # lonManage is supposed to ensure this, however this session could be
624: # part of some elaborate spoof that managed somehow to authenticate.
625: #
626:
1.169 foxr 627:
628: my $tablefile = ConfigFileFromSelector($filename);
629: if(! (defined $tablefile)) {
1.141 foxr 630: return "refused";
631: }
632: #
633: # >copy< the old table to the backup table
634: # don't rename in case system crashes/reboots etc. in the time
635: # window between a rename and write.
636: #
637: my $backupfile = $tablefile;
638: $backupfile =~ s/\.tab$/.old/;
1.143 foxr 639: if(!CopyFile($tablefile, $backupfile)) {
640: &logthis('<font color="green"> CopyFile from '.$tablefile." to ".$backupfile." failed </font>");
641: return "error:$!";
642: }
1.141 foxr 643: &logthis('<font color="green"> Pushfile: backed up '
644: .$tablefile." to $backupfile</font>");
645:
1.157 foxr 646: # If the file being pushed is the host file, we adjust the entry for ourself so that the
647: # IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible
648: # to conceive of conditions where we don't have a DNS entry locally. This is possible in a
649: # network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
650: # that possibilty.
651:
652: if($filename eq "host") {
653: $contents = AdjustHostContents($contents);
654: }
655:
1.141 foxr 656: # Install the new file:
657:
1.143 foxr 658: if(!InstallFile($tablefile, $contents)) {
659: &logthis('<font color="red"> Pushfile: unable to install '
1.145 foxr 660: .$tablefile." $! </font>");
1.143 foxr 661: return "error:$!";
1.224 foxr 662: } else {
1.143 foxr 663: &logthis('<font color="green"> Installed new '.$tablefile
664: ."</font>");
665:
666: }
667:
1.141 foxr 668:
669: # Indicate success:
670:
671: return "ok";
672:
673: }
1.145 foxr 674:
675: #
676: # Called to re-init either lonc or lond.
677: #
678: # Parameters:
679: # request - The full request by the client. This is of the form
680: # reinit:<process>
681: # where <process> is allowed to be either of
682: # lonc or lond
683: #
684: # Returns:
685: # The string to be sent back to the client either:
686: # ok - Everything worked just fine.
687: # error:why - There was a failure and why describes the reason.
688: #
689: #
690: sub ReinitProcess {
691: my $request = shift;
692:
1.146 foxr 693:
694: # separate the request (reinit) from the process identifier and
695: # validate it producing the name of the .pid file for the process.
696: #
697: #
698: my ($junk, $process) = split(":", $request);
1.147 foxr 699: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
1.146 foxr 700: if($process eq 'lonc') {
701: $processpidfile = $processpidfile."lonc.pid";
1.147 foxr 702: if (!open(PIDFILE, "< $processpidfile")) {
703: return "error:Open failed for $processpidfile";
704: }
705: my $loncpid = <PIDFILE>;
706: close(PIDFILE);
707: logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
708: ."</font>");
709: kill("USR2", $loncpid);
1.146 foxr 710: } elsif ($process eq 'lond') {
1.147 foxr 711: logthis('<font color="red"> Reinitializing self (lond) </font>');
712: &UpdateHosts; # Lond is us!!
1.146 foxr 713: } else {
714: &logthis('<font color="yellow" Invalid reinit request for '.$process
715: ."</font>");
716: return "error:Invalid process identifier $process";
717: }
1.145 foxr 718: return 'ok';
719: }
1.168 foxr 720: # Validate a line in a configuration file edit script:
721: # Validation includes:
722: # - Ensuring the command is valid.
723: # - Ensuring the command has sufficient parameters
724: # Parameters:
725: # scriptline - A line to validate (\n has been stripped for what it's worth).
1.167 foxr 726: #
1.168 foxr 727: # Return:
728: # 0 - Invalid scriptline.
729: # 1 - Valid scriptline
730: # NOTE:
731: # Only the command syntax is checked, not the executability of the
732: # command.
733: #
734: sub isValidEditCommand {
735: my $scriptline = shift;
736:
737: # Line elements are pipe separated:
738:
739: my ($command, $key, $newline) = split(/\|/, $scriptline);
740: &logthis('<font color="green"> isValideditCommand checking: '.
741: "Command = '$command', Key = '$key', Newline = '$newline' </font>\n");
742:
743: if ($command eq "delete") {
744: #
745: # key with no newline.
746: #
747: if( ($key eq "") || ($newline ne "")) {
748: return 0; # Must have key but no newline.
749: } else {
750: return 1; # Valid syntax.
751: }
1.169 foxr 752: } elsif ($command eq "replace") {
1.168 foxr 753: #
754: # key and newline:
755: #
756: if (($key eq "") || ($newline eq "")) {
757: return 0;
758: } else {
759: return 1;
760: }
1.169 foxr 761: } elsif ($command eq "append") {
762: if (($key ne "") && ($newline eq "")) {
763: return 1;
764: } else {
765: return 0;
766: }
1.168 foxr 767: } else {
768: return 0; # Invalid command.
769: }
770: return 0; # Should not get here!!!
771: }
1.169 foxr 772: #
773: # ApplyEdit - Applies an edit command to a line in a configuration
774: # file. It is the caller's responsiblity to validate the
775: # edit line.
776: # Parameters:
777: # $directive - A single edit directive to apply.
778: # Edit directives are of the form:
779: # append|newline - Appends a new line to the file.
780: # replace|key|newline - Replaces the line with key value 'key'
781: # delete|key - Deletes the line with key value 'key'.
782: # $editor - A config file editor object that contains the
783: # file being edited.
784: #
785: sub ApplyEdit {
1.192 foxr 786:
787: my ($directive, $editor) = @_;
1.169 foxr 788:
789: # Break the directive down into its command and its parameters
790: # (at most two at this point. The meaning of the parameters, if in fact
791: # they exist depends on the command).
792:
793: my ($command, $p1, $p2) = split(/\|/, $directive);
794:
795: if($command eq "append") {
796: $editor->Append($p1); # p1 - key p2 null.
797: } elsif ($command eq "replace") {
798: $editor->ReplaceLine($p1, $p2); # p1 - key p2 = newline.
799: } elsif ($command eq "delete") {
800: $editor->DeleteLine($p1); # p1 - key p2 null.
801: } else { # Should not get here!!!
802: die "Invalid command given to ApplyEdit $command"
803: }
804: }
805: #
806: # AdjustOurHost:
807: # Adjusts a host file stored in a configuration file editor object
808: # for the true IP address of this host. This is necessary for hosts
809: # that live behind a firewall.
810: # Those hosts have a publicly distributed IP of the firewall, but
811: # internally must use their actual IP. We assume that a given
812: # host only has a single IP interface for now.
813: # Formal Parameters:
814: # editor - The configuration file editor to adjust. This
815: # editor is assumed to contain a hosts.tab file.
816: # Strategy:
817: # - Figure out our hostname.
818: # - Lookup the entry for this host.
819: # - Modify the line to contain our IP
820: # - Do a replace for this host.
821: sub AdjustOurHost {
822: my $editor = shift;
823:
824: # figure out who I am.
825:
826: my $myHostName = $perlvar{'lonHostID'}; # LonCAPA hostname.
827:
828: # Get my host file entry.
829:
830: my $ConfigLine = $editor->Find($myHostName);
831: if(! (defined $ConfigLine)) {
832: die "AdjustOurHost - no entry for me in hosts file $myHostName";
833: }
834: # figure out my IP:
835: # Use the config line to get my hostname.
836: # Use gethostbyname to translate that into an IP address.
837: #
838: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);
839: my $BinaryIp = gethostbyname($name);
840: my $ip = inet_ntoa($ip);
841: #
842: # Reassemble the config line from the elements in the list.
843: # Note that if the loncnew items were not present before, they will
844: # be now even if they would be empty
845: #
846: my $newConfigLine = $id;
847: foreach my $item ($domain, $role, $name, $ip, $maxcon, $idleto, $mincon) {
848: $newConfigLine .= ":".$item;
849: }
850: # Replace the line:
851:
852: $editor->ReplaceLine($id, $newConfigLine);
853:
854: }
855: #
856: # ReplaceConfigFile:
857: # Replaces a configuration file with the contents of a
858: # configuration file editor object.
859: # This is done by:
860: # - Copying the target file to <filename>.old
861: # - Writing the new file to <filename>.tmp
862: # - Moving <filename.tmp> -> <filename>
863: # This laborious process ensures that the system is never without
864: # a configuration file that's at least valid (even if the contents
865: # may be dated).
866: # Parameters:
867: # filename - Name of the file to modify... this is a full path.
868: # editor - Editor containing the file.
869: #
870: sub ReplaceConfigFile {
1.192 foxr 871:
872: my ($filename, $editor) = @_;
1.168 foxr 873:
1.169 foxr 874: CopyFile ($filename, $filename.".old");
875:
876: my $contents = $editor->Get(); # Get the contents of the file.
877:
878: InstallFile($filename, $contents);
879: }
1.168 foxr 880: #
881: #
882: # Called to edit a configuration table file
1.167 foxr 883: # Parameters:
884: # request - The entire command/request sent by lonc or lonManage
885: # Return:
886: # The reply to send to the client.
1.168 foxr 887: #
1.167 foxr 888: sub EditFile {
889: my $request = shift;
890:
891: # Split the command into it's pieces: edit:filetype:script
892:
1.168 foxr 893: my ($request, $filetype, $script) = split(/:/, $request,3); # : in script
1.167 foxr 894:
895: # Check the pre-coditions for success:
896:
897: if($request != "edit") { # Something is amiss afoot alack.
898: return "error:edit request detected, but request != 'edit'\n";
899: }
900: if( ($filetype ne "hosts") &&
901: ($filetype ne "domain")) {
902: return "error:edit requested with invalid file specifier: $filetype \n";
903: }
904:
905: # Split the edit script and check it's validity.
1.168 foxr 906:
907: my @scriptlines = split(/\n/, $script); # one line per element.
908: my $linecount = scalar(@scriptlines);
909: for(my $i = 0; $i < $linecount; $i++) {
910: chomp($scriptlines[$i]);
911: if(!isValidEditCommand($scriptlines[$i])) {
912: return "error:edit with bad script line: '$scriptlines[$i]' \n";
913: }
914: }
1.145 foxr 915:
1.167 foxr 916: # Execute the edit operation.
1.169 foxr 917: # - Create a config file editor for the appropriate file and
918: # - execute each command in the script:
919: #
920: my $configfile = ConfigFileFromSelector($filetype);
921: if (!(defined $configfile)) {
922: return "refused\n";
923: }
924: my $editor = ConfigFileEdit->new($configfile);
1.167 foxr 925:
1.169 foxr 926: for (my $i = 0; $i < $linecount; $i++) {
927: ApplyEdit($scriptlines[$i], $editor);
928: }
929: # If the file is the host file, ensure that our host is
930: # adjusted to have our ip:
931: #
932: if($filetype eq "host") {
933: AdjustOurHost($editor);
934: }
935: # Finally replace the current file with our file.
936: #
937: ReplaceConfigFile($configfile, $editor);
1.167 foxr 938:
939: return "ok\n";
940: }
1.207 foxr 941:
942: #---------------------------------------------------------------
943: #
944: # Manipulation of hash based databases (factoring out common code
945: # for later use as we refactor.
946: #
947: # Ties a domain level resource file to a hash.
948: # If requested a history entry is created in the associated hist file.
949: #
950: # Parameters:
951: # domain - Name of the domain in which the resource file lives.
952: # namespace - Name of the hash within that domain.
953: # how - How to tie the hash (e.g. GDBM_WRCREAT()).
954: # loghead - Optional parameter, if present a log entry is created
955: # in the associated history file and this is the first part
956: # of that entry.
957: # logtail - Goes along with loghead, The actual logentry is of the
958: # form $loghead:<timestamp>:logtail.
959: # Returns:
960: # Reference to a hash bound to the db file or alternatively undef
961: # if the tie failed.
962: #
1.209 albertel 963: sub tie_domain_hash {
1.210 albertel 964: my ($domain,$namespace,$how,$loghead,$logtail) = @_;
1.207 foxr 965:
966: # Filter out any whitespace in the domain name:
967:
968: $domain =~ s/\W//g;
969:
970: # We have enough to go on to tie the hash:
971:
972: my $user_top_dir = $perlvar{'lonUsersDir'};
973: my $domain_dir = $user_top_dir."/$domain";
974: my $resource_file = $domain_dir."/$namespace.db";
975: my %hash;
976: if(tie(%hash, 'GDBM_File', $resource_file, $how, 0640)) {
1.211 albertel 977: if (defined($loghead)) { # Need to log the operation.
1.210 albertel 978: my $logFh = IO::File->new(">>$domain_dir/$namespace.hist");
1.207 foxr 979: if($logFh) {
980: my $timestamp = time;
981: print $logFh "$loghead:$timestamp:$logtail\n";
982: }
1.210 albertel 983: $logFh->close;
1.207 foxr 984: }
985: return \%hash; # Return the tied hash.
1.210 albertel 986: } else {
1.207 foxr 987: return undef; # Tie failed.
988: }
989: }
990:
991: #
992: # Ties a user's resource file to a hash.
993: # If necessary, an appropriate history
994: # log file entry is made as well.
995: # This sub factors out common code from the subs that manipulate
996: # the various gdbm files that keep keyword value pairs.
997: # Parameters:
998: # domain - Name of the domain the user is in.
999: # user - Name of the 'current user'.
1000: # namespace - Namespace representing the file to tie.
1001: # how - What the tie is done to (e.g. GDBM_WRCREAT().
1002: # loghead - Optional first part of log entry if there may be a
1003: # history file.
1004: # what - Optional tail of log entry if there may be a history
1005: # file.
1006: # Returns:
1007: # hash to which the database is tied. It's up to the caller to untie.
1008: # undef if the has could not be tied.
1009: #
1.210 albertel 1010: sub tie_user_hash {
1011: my ($domain,$user,$namespace,$how,$loghead,$what) = @_;
1.207 foxr 1012:
1013: $namespace=~s/\//\_/g; # / -> _
1014: $namespace=~s/\W//g; # whitespace eliminated.
1015: my $proname = propath($domain, $user);
1016:
1017: # Tie the database.
1018:
1019: my %hash;
1020: if(tie(%hash, 'GDBM_File', "$proname/$namespace.db",
1021: $how, 0640)) {
1.209 albertel 1022: # If this is a namespace for which a history is kept,
1023: # make the history log entry:
1.252 albertel 1024: if (($namespace !~/^nohist\_/) && (defined($loghead))) {
1.209 albertel 1025: my $args = scalar @_;
1026: Debug(" Opening history: $namespace $args");
1027: my $hfh = IO::File->new(">>$proname/$namespace.hist");
1028: if($hfh) {
1029: my $now = time;
1030: print $hfh "$loghead:$now:$what\n";
1031: }
1.210 albertel 1032: $hfh->close;
1.209 albertel 1033: }
1.207 foxr 1034: return \%hash;
1.209 albertel 1035: } else {
1.207 foxr 1036: return undef;
1037: }
1038:
1039: }
1.214 foxr 1040:
1.255 foxr 1041: # read_profile
1042: #
1043: # Returns a set of specific entries from a user's profile file.
1044: # this is a utility function that is used by both get_profile_entry and
1045: # get_profile_entry_encrypted.
1046: #
1047: # Parameters:
1048: # udom - Domain in which the user exists.
1049: # uname - User's account name (loncapa account)
1050: # namespace - The profile namespace to open.
1051: # what - A set of & separated queries.
1052: # Returns:
1053: # If all ok: - The string that needs to be shipped back to the user.
1054: # If failure - A string that starts with error: followed by the failure
1055: # reason.. note that this probabyl gets shipped back to the
1056: # user as well.
1057: #
1058: sub read_profile {
1059: my ($udom, $uname, $namespace, $what) = @_;
1060:
1061: my $hashref = &tie_user_hash($udom, $uname, $namespace,
1062: &GDBM_READER());
1063: if ($hashref) {
1064: my @queries=split(/\&/,$what);
1065: my $qresult='';
1066:
1067: for (my $i=0;$i<=$#queries;$i++) {
1068: $qresult.="$hashref->{$queries[$i]}&"; # Presumably failure gives empty string.
1069: }
1070: $qresult=~s/\&$//; # Remove trailing & from last lookup.
1071: if (untie %$hashref) {
1072: return $qresult;
1073: } else {
1074: return "error: ".($!+0)." untie (GDBM) Failed";
1075: }
1076: } else {
1077: if ($!+0 == 2) {
1078: return "error:No such file or GDBM reported bad block error";
1079: } else {
1080: return "error: ".($!+0)." tie (GDBM) Failed";
1081: }
1082: }
1083:
1084: }
1.214 foxr 1085: #--------------------- Request Handlers --------------------------------------------
1086: #
1.215 foxr 1087: # By convention each request handler registers itself prior to the sub
1088: # declaration:
1.214 foxr 1089: #
1090:
1.216 foxr 1091: #++
1092: #
1.214 foxr 1093: # Handles ping requests.
1094: # Parameters:
1095: # $cmd - the actual keyword that invoked us.
1096: # $tail - the tail of the request that invoked us.
1097: # $replyfd- File descriptor connected to the client
1098: # Implicit Inputs:
1099: # $currenthostid - Global variable that carries the name of the host we are
1100: # known as.
1101: # Returns:
1102: # 1 - Ok to continue processing.
1103: # 0 - Program should exit.
1104: # Side effects:
1105: # Reply information is sent to the client.
1106: sub ping_handler {
1107: my ($cmd, $tail, $client) = @_;
1108: Debug("$cmd $tail $client .. $currenthostid:");
1109:
1110: Reply( $client,"$currenthostid\n","$cmd:$tail");
1111:
1112: return 1;
1113: }
1114: ®ister_handler("ping", \&ping_handler, 0, 1, 1); # Ping unencoded, client or manager.
1115:
1.216 foxr 1116: #++
1.215 foxr 1117: #
1118: # Handles pong requests. Pong replies with our current host id, and
1119: # the results of a ping sent to us via our lonc.
1120: #
1121: # Parameters:
1122: # $cmd - the actual keyword that invoked us.
1123: # $tail - the tail of the request that invoked us.
1124: # $replyfd- File descriptor connected to the client
1125: # Implicit Inputs:
1126: # $currenthostid - Global variable that carries the name of the host we are
1127: # connected to.
1128: # Returns:
1129: # 1 - Ok to continue processing.
1130: # 0 - Program should exit.
1131: # Side effects:
1132: # Reply information is sent to the client.
1133: sub pong_handler {
1134: my ($cmd, $tail, $replyfd) = @_;
1135:
1136: my $reply=&reply("ping",$clientname);
1137: &Reply( $replyfd, "$currenthostid:$reply\n", "$cmd:$tail");
1138: return 1;
1139: }
1140: ®ister_handler("pong", \&pong_handler, 0, 1, 1); # Pong unencoded, client or manager
1141:
1.216 foxr 1142: #++
1143: # Called to establish an encrypted session key with the remote client.
1144: # Note that with secure lond, in most cases this function is never
1145: # invoked. Instead, the secure session key is established either
1146: # via a local file that's locked down tight and only lives for a short
1147: # time, or via an ssl tunnel...and is generated from a bunch-o-random
1148: # bits from /dev/urandom, rather than the predictable pattern used by
1149: # by this sub. This sub is only used in the old-style insecure
1150: # key negotiation.
1151: # Parameters:
1152: # $cmd - the actual keyword that invoked us.
1153: # $tail - the tail of the request that invoked us.
1154: # $replyfd- File descriptor connected to the client
1155: # Implicit Inputs:
1156: # $currenthostid - Global variable that carries the name of the host
1157: # known as.
1158: # $clientname - Global variable that carries the name of the hsot we're connected to.
1159: # Returns:
1160: # 1 - Ok to continue processing.
1161: # 0 - Program should exit.
1162: # Implicit Outputs:
1163: # Reply information is sent to the client.
1164: # $cipher is set with a reference to a new IDEA encryption object.
1165: #
1166: sub establish_key_handler {
1167: my ($cmd, $tail, $replyfd) = @_;
1168:
1169: my $buildkey=time.$$.int(rand 100000);
1170: $buildkey=~tr/1-6/A-F/;
1171: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
1172: my $key=$currenthostid.$clientname;
1173: $key=~tr/a-z/A-Z/;
1174: $key=~tr/G-P/0-9/;
1175: $key=~tr/Q-Z/0-9/;
1176: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
1177: $key=substr($key,0,32);
1178: my $cipherkey=pack("H32",$key);
1179: $cipher=new IDEA $cipherkey;
1180: &Reply($replyfd, "$buildkey\n", "$cmd:$tail");
1181:
1182: return 1;
1183:
1184: }
1185: ®ister_handler("ekey", \&establish_key_handler, 0, 1,1);
1186:
1.217 foxr 1187: # Handler for the load command. Returns the current system load average
1188: # to the requestor.
1189: #
1190: # Parameters:
1191: # $cmd - the actual keyword that invoked us.
1192: # $tail - the tail of the request that invoked us.
1193: # $replyfd- File descriptor connected to the client
1194: # Implicit Inputs:
1195: # $currenthostid - Global variable that carries the name of the host
1196: # known as.
1197: # $clientname - Global variable that carries the name of the hsot we're connected to.
1198: # Returns:
1199: # 1 - Ok to continue processing.
1200: # 0 - Program should exit.
1201: # Side effects:
1202: # Reply information is sent to the client.
1203: sub load_handler {
1204: my ($cmd, $tail, $replyfd) = @_;
1205:
1206: # Get the load average from /proc/loadavg and calculate it as a percentage of
1207: # the allowed load limit as set by the perl global variable lonLoadLim
1208:
1209: my $loadavg;
1210: my $loadfile=IO::File->new('/proc/loadavg');
1211:
1212: $loadavg=<$loadfile>;
1213: $loadavg =~ s/\s.*//g; # Extract the first field only.
1214:
1215: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1216:
1217: &Reply( $replyfd, "$loadpercent\n", "$cmd:$tail");
1218:
1219: return 1;
1220: }
1.263 albertel 1221: ®ister_handler("load", \&load_handler, 0, 1, 0);
1.217 foxr 1222:
1223: #
1224: # Process the userload request. This sub returns to the client the current
1225: # user load average. It can be invoked either by clients or managers.
1226: #
1227: # Parameters:
1228: # $cmd - the actual keyword that invoked us.
1229: # $tail - the tail of the request that invoked us.
1230: # $replyfd- File descriptor connected to the client
1231: # Implicit Inputs:
1232: # $currenthostid - Global variable that carries the name of the host
1233: # known as.
1234: # $clientname - Global variable that carries the name of the hsot we're connected to.
1235: # Returns:
1236: # 1 - Ok to continue processing.
1237: # 0 - Program should exit
1238: # Implicit inputs:
1239: # whatever the userload() function requires.
1240: # Implicit outputs:
1241: # the reply is written to the client.
1242: #
1243: sub user_load_handler {
1244: my ($cmd, $tail, $replyfd) = @_;
1245:
1246: my $userloadpercent=&userload();
1247: &Reply($replyfd, "$userloadpercent\n", "$cmd:$tail");
1248:
1249: return 1;
1250: }
1.263 albertel 1251: ®ister_handler("userload", \&user_load_handler, 0, 1, 0);
1.217 foxr 1252:
1.218 foxr 1253: # Process a request for the authorization type of a user:
1254: # (userauth).
1255: #
1256: # Parameters:
1257: # $cmd - the actual keyword that invoked us.
1258: # $tail - the tail of the request that invoked us.
1259: # $replyfd- File descriptor connected to the client
1260: # Returns:
1261: # 1 - Ok to continue processing.
1262: # 0 - Program should exit
1263: # Implicit outputs:
1264: # The user authorization type is written to the client.
1265: #
1266: sub user_authorization_type {
1267: my ($cmd, $tail, $replyfd) = @_;
1268:
1269: my $userinput = "$cmd:$tail";
1270:
1271: # Pull the domain and username out of the command tail.
1.222 foxr 1272: # and call get_auth_type to determine the authentication type.
1.218 foxr 1273:
1274: my ($udom,$uname)=split(/:/,$tail);
1.222 foxr 1275: my $result = &get_auth_type($udom, $uname);
1.218 foxr 1276: if($result eq "nouser") {
1277: &Failure( $replyfd, "unknown_user\n", $userinput);
1278: } else {
1279: #
1.222 foxr 1280: # We only want to pass the second field from get_auth_type
1.218 foxr 1281: # for ^krb.. otherwise we'll be handing out the encrypted
1282: # password for internals e.g.
1283: #
1284: my ($type,$otherinfo) = split(/:/,$result);
1285: if($type =~ /^krb/) {
1286: $type = $result;
1.269 raeburn 1287: } else {
1288: $type .= ':';
1289: }
1290: &Reply( $replyfd, "$type\n", $userinput);
1.218 foxr 1291: }
1292:
1293: return 1;
1294: }
1295: ®ister_handler("currentauth", \&user_authorization_type, 1, 1, 0);
1296:
1297: # Process a request by a manager to push a hosts or domain table
1298: # to us. We pick apart the command and pass it on to the subs
1299: # that already exist to do this.
1300: #
1301: # Parameters:
1302: # $cmd - the actual keyword that invoked us.
1303: # $tail - the tail of the request that invoked us.
1304: # $client - File descriptor connected to the client
1305: # Returns:
1306: # 1 - Ok to continue processing.
1307: # 0 - Program should exit
1308: # Implicit Output:
1309: # a reply is written to the client.
1310: sub push_file_handler {
1311: my ($cmd, $tail, $client) = @_;
1312:
1313: my $userinput = "$cmd:$tail";
1314:
1315: # At this time we only know that the IP of our partner is a valid manager
1316: # the code below is a hook to do further authentication (e.g. to resolve
1317: # spoofing).
1318:
1319: my $cert = &GetCertificate($userinput);
1320: if(&ValidManager($cert)) {
1321:
1322: # Now presumably we have the bona fides of both the peer host and the
1323: # process making the request.
1324:
1325: my $reply = &PushFile($userinput);
1326: &Reply($client, "$reply\n", $userinput);
1327:
1328: } else {
1329: &Failure( $client, "refused\n", $userinput);
1330: }
1.219 foxr 1331: return 1;
1.218 foxr 1332: }
1333: ®ister_handler("pushfile", \&push_file_handler, 1, 0, 1);
1334:
1.243 banghart 1335: #
1336: # du - list the disk usuage of a directory recursively.
1337: #
1338: # note: stolen code from the ls file handler
1339: # under construction by Rick Banghart
1340: # .
1341: # Parameters:
1342: # $cmd - The command that dispatched us (du).
1343: # $ududir - The directory path to list... I'm not sure what this
1344: # is relative as things like ls:. return e.g.
1345: # no_such_dir.
1346: # $client - Socket open on the client.
1347: # Returns:
1348: # 1 - indicating that the daemon should not disconnect.
1349: # Side Effects:
1350: # The reply is written to $client.
1351: #
1352: sub du_handler {
1353: my ($cmd, $ududir, $client) = @_;
1.251 foxr 1354: my ($ududir) = split(/:/,$ududir); # Make 'telnet' testing easier.
1355: my $userinput = "$cmd:$ududir";
1356:
1.245 albertel 1357: if ($ududir=~/\.\./ || $ududir!~m|^/home/httpd/|) {
1358: &Failure($client,"refused\n","$cmd:$ududir");
1359: return 1;
1360: }
1.249 foxr 1361: # Since $ududir could have some nasties in it,
1362: # we will require that ududir is a valid
1363: # directory. Just in case someone tries to
1364: # slip us a line like .;(cd /home/httpd rm -rf*)
1365: # etc.
1366: #
1367: if (-d $ududir) {
1.292 albertel 1368: my $total_size=0;
1369: my $code=sub {
1370: if ($_=~/\.\d+\./) { return;}
1371: if ($_=~/\.meta$/) { return;}
1372: $total_size+=(stat($_))[7];
1373: };
1.295 raeburn 1374: chdir($ududir);
1.292 albertel 1375: find($code,$ududir);
1376: $total_size=int($total_size/1024);
1377: &Reply($client,"$total_size\n","$cmd:$ududir");
1.249 foxr 1378: } else {
1.251 foxr 1379: &Failure($client, "bad_directory:$ududir\n","$cmd:$ududir");
1.249 foxr 1380: }
1.243 banghart 1381: return 1;
1382: }
1383: ®ister_handler("du", \&du_handler, 0, 1, 0);
1.218 foxr 1384:
1.239 foxr 1385: #
1.280 matthew 1386: # The ls_handler routine should be considered obosolete and is retained
1387: # for communication with legacy servers. Please see the ls2_handler.
1388: #
1.239 foxr 1389: # ls - list the contents of a directory. For each file in the
1390: # selected directory the filename followed by the full output of
1391: # the stat function is returned. The returned info for each
1392: # file are separated by ':'. The stat fields are separated by &'s.
1393: # Parameters:
1394: # $cmd - The command that dispatched us (ls).
1395: # $ulsdir - The directory path to list... I'm not sure what this
1396: # is relative as things like ls:. return e.g.
1397: # no_such_dir.
1398: # $client - Socket open on the client.
1399: # Returns:
1400: # 1 - indicating that the daemon should not disconnect.
1401: # Side Effects:
1402: # The reply is written to $client.
1403: #
1404: sub ls_handler {
1.280 matthew 1405: # obsoleted by ls2_handler
1.239 foxr 1406: my ($cmd, $ulsdir, $client) = @_;
1407:
1408: my $userinput = "$cmd:$ulsdir";
1409:
1410: my $obs;
1411: my $rights;
1412: my $ulsout='';
1413: my $ulsfn;
1414: if (-e $ulsdir) {
1415: if(-d $ulsdir) {
1416: if (opendir(LSDIR,$ulsdir)) {
1417: while ($ulsfn=readdir(LSDIR)) {
1.291 albertel 1418: undef($obs);
1419: undef($rights);
1.239 foxr 1420: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1421: #We do some obsolete checking here
1422: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1423: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1424: my @obsolete=<FILE>;
1425: foreach my $obsolete (@obsolete) {
1.301 www 1426: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1.239 foxr 1427: if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
1428: }
1429: }
1430: $ulsout.=$ulsfn.'&'.join('&',@ulsstats);
1431: if($obs eq '1') { $ulsout.="&1"; }
1432: else { $ulsout.="&0"; }
1433: if($rights eq '1') { $ulsout.="&1:"; }
1434: else { $ulsout.="&0:"; }
1435: }
1436: closedir(LSDIR);
1437: }
1438: } else {
1439: my @ulsstats=stat($ulsdir);
1440: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1441: }
1442: } else {
1443: $ulsout='no_such_dir';
1444: }
1445: if ($ulsout eq '') { $ulsout='empty'; }
1.249 foxr 1446: &Reply($client, "$ulsout\n", $userinput); # This supports debug logging.
1.239 foxr 1447:
1448: return 1;
1449:
1450: }
1451: ®ister_handler("ls", \&ls_handler, 0, 1, 0);
1452:
1.280 matthew 1453: #
1454: # Please also see the ls_handler, which this routine obosolets.
1455: # ls2_handler differs from ls_handler in that it escapes its return
1456: # values before concatenating them together with ':'s.
1457: #
1458: # ls2 - list the contents of a directory. For each file in the
1459: # selected directory the filename followed by the full output of
1460: # the stat function is returned. The returned info for each
1461: # file are separated by ':'. The stat fields are separated by &'s.
1462: # Parameters:
1463: # $cmd - The command that dispatched us (ls).
1464: # $ulsdir - The directory path to list... I'm not sure what this
1465: # is relative as things like ls:. return e.g.
1466: # no_such_dir.
1467: # $client - Socket open on the client.
1468: # Returns:
1469: # 1 - indicating that the daemon should not disconnect.
1470: # Side Effects:
1471: # The reply is written to $client.
1472: #
1473: sub ls2_handler {
1474: my ($cmd, $ulsdir, $client) = @_;
1475:
1476: my $userinput = "$cmd:$ulsdir";
1477:
1478: my $obs;
1479: my $rights;
1480: my $ulsout='';
1481: my $ulsfn;
1482: if (-e $ulsdir) {
1483: if(-d $ulsdir) {
1484: if (opendir(LSDIR,$ulsdir)) {
1485: while ($ulsfn=readdir(LSDIR)) {
1.291 albertel 1486: undef($obs);
1487: undef($rights);
1.280 matthew 1488: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1489: #We do some obsolete checking here
1490: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1491: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1492: my @obsolete=<FILE>;
1493: foreach my $obsolete (@obsolete) {
1.301 www 1494: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1.280 matthew 1495: if($obsolete =~ m|(<copyright>)(default)|) {
1496: $rights = 1;
1497: }
1498: }
1499: }
1500: my $tmp = $ulsfn.'&'.join('&',@ulsstats);
1501: if ($obs eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1502: if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1503: $ulsout.= &escape($tmp).':';
1504: }
1505: closedir(LSDIR);
1506: }
1507: } else {
1508: my @ulsstats=stat($ulsdir);
1509: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1510: }
1511: } else {
1512: $ulsout='no_such_dir';
1513: }
1514: if ($ulsout eq '') { $ulsout='empty'; }
1515: &Reply($client, "$ulsout\n", $userinput); # This supports debug logging.
1516: return 1;
1517: }
1518: ®ister_handler("ls2", \&ls2_handler, 0, 1, 0);
1519:
1.218 foxr 1520: # Process a reinit request. Reinit requests that either
1521: # lonc or lond be reinitialized so that an updated
1522: # host.tab or domain.tab can be processed.
1523: #
1524: # Parameters:
1525: # $cmd - the actual keyword that invoked us.
1526: # $tail - the tail of the request that invoked us.
1527: # $client - File descriptor connected to the client
1528: # Returns:
1529: # 1 - Ok to continue processing.
1530: # 0 - Program should exit
1531: # Implicit output:
1532: # a reply is sent to the client.
1533: #
1534: sub reinit_process_handler {
1535: my ($cmd, $tail, $client) = @_;
1536:
1537: my $userinput = "$cmd:$tail";
1538:
1539: my $cert = &GetCertificate($userinput);
1540: if(&ValidManager($cert)) {
1541: chomp($userinput);
1542: my $reply = &ReinitProcess($userinput);
1543: &Reply( $client, "$reply\n", $userinput);
1544: } else {
1545: &Failure( $client, "refused\n", $userinput);
1546: }
1547: return 1;
1548: }
1549: ®ister_handler("reinit", \&reinit_process_handler, 1, 0, 1);
1550:
1551: # Process the editing script for a table edit operation.
1552: # the editing operation must be encrypted and requested by
1553: # a manager host.
1554: #
1555: # Parameters:
1556: # $cmd - the actual keyword that invoked us.
1557: # $tail - the tail of the request that invoked us.
1558: # $client - File descriptor connected to the client
1559: # Returns:
1560: # 1 - Ok to continue processing.
1561: # 0 - Program should exit
1562: # Implicit output:
1563: # a reply is sent to the client.
1564: #
1565: sub edit_table_handler {
1566: my ($command, $tail, $client) = @_;
1567:
1568: my $userinput = "$command:$tail";
1569:
1570: my $cert = &GetCertificate($userinput);
1571: if(&ValidManager($cert)) {
1572: my($filetype, $script) = split(/:/, $tail);
1573: if (($filetype eq "hosts") ||
1574: ($filetype eq "domain")) {
1575: if($script ne "") {
1576: &Reply($client, # BUGBUG - EditFile
1577: &EditFile($userinput), # could fail.
1578: $userinput);
1579: } else {
1580: &Failure($client,"refused\n",$userinput);
1581: }
1582: } else {
1583: &Failure($client,"refused\n",$userinput);
1584: }
1585: } else {
1586: &Failure($client,"refused\n",$userinput);
1587: }
1588: return 1;
1589: }
1.263 albertel 1590: ®ister_handler("edit", \&edit_table_handler, 1, 0, 1);
1.218 foxr 1591:
1.220 foxr 1592: #
1593: # Authenticate a user against the LonCAPA authentication
1594: # database. Note that there are several authentication
1595: # possibilities:
1596: # - unix - The user can be authenticated against the unix
1597: # password file.
1598: # - internal - The user can be authenticated against a purely
1599: # internal per user password file.
1600: # - kerberos - The user can be authenticated against either a kerb4 or kerb5
1601: # ticket granting authority.
1602: # - user - The person tailoring LonCAPA can supply a user authentication
1603: # mechanism that is per system.
1604: #
1605: # Parameters:
1606: # $cmd - The command that got us here.
1607: # $tail - Tail of the command (remaining parameters).
1608: # $client - File descriptor connected to client.
1609: # Returns
1610: # 0 - Requested to exit, caller should shut down.
1611: # 1 - Continue processing.
1612: # Implicit inputs:
1613: # The authentication systems describe above have their own forms of implicit
1614: # input into the authentication process that are described above.
1615: #
1616: sub authenticate_handler {
1617: my ($cmd, $tail, $client) = @_;
1618:
1619:
1620: # Regenerate the full input line
1621:
1622: my $userinput = $cmd.":".$tail;
1623:
1624: # udom - User's domain.
1625: # uname - Username.
1626: # upass - User's password.
1627:
1628: my ($udom,$uname,$upass)=split(/:/,$tail);
1629: &Debug(" Authenticate domain = $udom, user = $uname, password = $upass");
1630: chomp($upass);
1631: $upass=&unescape($upass);
1632:
1633: my $pwdcorrect = &validate_user($udom, $uname, $upass);
1634: if($pwdcorrect) {
1635: &Reply( $client, "authorized\n", $userinput);
1636: #
1637: # Bad credentials: Failed to authorize
1638: #
1639: } else {
1640: &Failure( $client, "non_authorized\n", $userinput);
1641: }
1642:
1643: return 1;
1644: }
1.263 albertel 1645: ®ister_handler("auth", \&authenticate_handler, 1, 1, 0);
1.214 foxr 1646:
1.222 foxr 1647: #
1648: # Change a user's password. Note that this function is complicated by
1649: # the fact that a user may be authenticated in more than one way:
1650: # At present, we are not able to change the password for all types of
1651: # authentication methods. Only for:
1652: # unix - unix password or shadow passoword style authentication.
1653: # local - Locally written authentication mechanism.
1654: # For now, kerb4 and kerb5 password changes are not supported and result
1655: # in an error.
1656: # FUTURE WORK:
1657: # Support kerberos passwd changes?
1658: # Parameters:
1659: # $cmd - The command that got us here.
1660: # $tail - Tail of the command (remaining parameters).
1661: # $client - File descriptor connected to client.
1662: # Returns
1663: # 0 - Requested to exit, caller should shut down.
1664: # 1 - Continue processing.
1665: # Implicit inputs:
1666: # The authentication systems describe above have their own forms of implicit
1667: # input into the authentication process that are described above.
1668: sub change_password_handler {
1669: my ($cmd, $tail, $client) = @_;
1670:
1671: my $userinput = $cmd.":".$tail; # Reconstruct client's string.
1672:
1673: #
1674: # udom - user's domain.
1675: # uname - Username.
1676: # upass - Current password.
1677: # npass - New password.
1678:
1679: my ($udom,$uname,$upass,$npass)=split(/:/,$tail);
1680:
1681: $upass=&unescape($upass);
1682: $npass=&unescape($npass);
1683: &Debug("Trying to change password for $uname");
1684:
1685: # First require that the user can be authenticated with their
1686: # old password:
1687:
1688: my $validated = &validate_user($udom, $uname, $upass);
1689: if($validated) {
1690: my $realpasswd = &get_auth_type($udom, $uname); # Defined since authd.
1691:
1692: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1693: if ($howpwd eq 'internal') {
1694: &Debug("internal auth");
1695: my $salt=time;
1696: $salt=substr($salt,6,2);
1697: my $ncpass=crypt($npass,$salt);
1698: if(&rewrite_password_file($udom, $uname, "internal:$ncpass")) {
1699: &logthis("Result of password change for "
1700: ."$uname: pwchange_success");
1701: &Reply($client, "ok\n", $userinput);
1702: } else {
1703: &logthis("Unable to open $uname passwd "
1704: ."to change password");
1705: &Failure( $client, "non_authorized\n",$userinput);
1706: }
1707: } elsif ($howpwd eq 'unix') {
1.287 foxr 1708: my $result = &change_unix_password($uname, $npass);
1.222 foxr 1709: &logthis("Result of password change for $uname: ".
1.287 foxr 1710: $result);
1.222 foxr 1711: &Reply($client, "$result\n", $userinput);
1712: } else {
1713: # this just means that the current password mode is not
1714: # one we know how to change (e.g the kerberos auth modes or
1715: # locally written auth handler).
1716: #
1717: &Failure( $client, "auth_mode_error\n", $userinput);
1718: }
1719:
1.224 foxr 1720: } else {
1.222 foxr 1721: &Failure( $client, "non_authorized\n", $userinput);
1722: }
1723:
1724: return 1;
1725: }
1.263 albertel 1726: ®ister_handler("passwd", \&change_password_handler, 1, 1, 0);
1.222 foxr 1727:
1.225 foxr 1728: #
1729: # Create a new user. User in this case means a lon-capa user.
1730: # The user must either already exist in some authentication realm
1731: # like kerberos or the /etc/passwd. If not, a user completely local to
1732: # this loncapa system is created.
1733: #
1734: # Parameters:
1735: # $cmd - The command that got us here.
1736: # $tail - Tail of the command (remaining parameters).
1737: # $client - File descriptor connected to client.
1738: # Returns
1739: # 0 - Requested to exit, caller should shut down.
1740: # 1 - Continue processing.
1741: # Implicit inputs:
1742: # The authentication systems describe above have their own forms of implicit
1743: # input into the authentication process that are described above.
1744: sub add_user_handler {
1745:
1746: my ($cmd, $tail, $client) = @_;
1747:
1748:
1749: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
1750: my $userinput = $cmd.":".$tail; # Reconstruct the full request line.
1751:
1752: &Debug("cmd =".$cmd." $udom =".$udom." uname=".$uname);
1753:
1754:
1755: if($udom eq $currentdomainid) { # Reject new users for other domains...
1756:
1757: my $oldumask=umask(0077);
1758: chomp($npass);
1759: $npass=&unescape($npass);
1760: my $passfilename = &password_path($udom, $uname);
1761: &Debug("Password file created will be:".$passfilename);
1762: if (-e $passfilename) {
1763: &Failure( $client, "already_exists\n", $userinput);
1764: } else {
1765: my $fperror='';
1.264 albertel 1766: if (!&mkpath($passfilename)) {
1767: $fperror="error: ".($!+0)." mkdir failed while attempting "
1768: ."makeuser";
1.225 foxr 1769: }
1770: unless ($fperror) {
1771: my $result=&make_passwd_file($uname, $umode,$npass, $passfilename);
1772: &Reply($client, $result, $userinput); #BUGBUG - could be fail
1773: } else {
1774: &Failure($client, "$fperror\n", $userinput);
1775: }
1776: }
1777: umask($oldumask);
1778: } else {
1779: &Failure($client, "not_right_domain\n",
1780: $userinput); # Even if we are multihomed.
1781:
1782: }
1783: return 1;
1784:
1785: }
1786: ®ister_handler("makeuser", \&add_user_handler, 1, 1, 0);
1787:
1788: #
1789: # Change the authentication method of a user. Note that this may
1790: # also implicitly change the user's password if, for example, the user is
1791: # joining an existing authentication realm. Known authentication realms at
1792: # this time are:
1793: # internal - Purely internal password file (only loncapa knows this user)
1794: # local - Institutionally written authentication module.
1795: # unix - Unix user (/etc/passwd with or without /etc/shadow).
1796: # kerb4 - kerberos version 4
1797: # kerb5 - kerberos version 5
1798: #
1799: # Parameters:
1800: # $cmd - The command that got us here.
1801: # $tail - Tail of the command (remaining parameters).
1802: # $client - File descriptor connected to client.
1803: # Returns
1804: # 0 - Requested to exit, caller should shut down.
1805: # 1 - Continue processing.
1806: # Implicit inputs:
1807: # The authentication systems describe above have their own forms of implicit
1808: # input into the authentication process that are described above.
1.287 foxr 1809: # NOTE:
1810: # This is also used to change the authentication credential values (e.g. passwd).
1811: #
1.225 foxr 1812: #
1813: sub change_authentication_handler {
1814:
1815: my ($cmd, $tail, $client) = @_;
1816:
1817: my $userinput = "$cmd:$tail"; # Reconstruct user input.
1818:
1819: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
1820: &Debug("cmd = ".$cmd." domain= ".$udom."uname =".$uname." umode= ".$umode);
1821: if ($udom ne $currentdomainid) {
1822: &Failure( $client, "not_right_domain\n", $client);
1823: } else {
1824:
1825: chomp($npass);
1826:
1827: $npass=&unescape($npass);
1.261 foxr 1828: my $oldauth = &get_auth_type($udom, $uname); # Get old auth info.
1.225 foxr 1829: my $passfilename = &password_path($udom, $uname);
1830: if ($passfilename) { # Not allowed to create a new user!!
1.287 foxr 1831: # If just changing the unix passwd. need to arrange to run
1832: # passwd since otherwise make_passwd_file will run
1833: # lcuseradd which fails if an account already exists
1834: # (to prevent an unscrupulous LONCAPA admin from stealing
1835: # an existing account by overwriting it as a LonCAPA account).
1836:
1837: if(($oldauth =~/^unix/) && ($umode eq "unix")) {
1838: my $result = &change_unix_password($uname, $npass);
1839: &logthis("Result of password change for $uname: ".$result);
1840: if ($result eq "ok") {
1841: &Reply($client, "$result\n")
1.288 albertel 1842: } else {
1.287 foxr 1843: &Failure($client, "$result\n");
1844: }
1.288 albertel 1845: } else {
1.287 foxr 1846: my $result=&make_passwd_file($uname, $umode,$npass,$passfilename);
1847: #
1848: # If the current auth mode is internal, and the old auth mode was
1849: # unix, or krb*, and the user is an author for this domain,
1850: # re-run manage_permissions for that role in order to be able
1851: # to take ownership of the construction space back to www:www
1852: #
1853:
1854:
1855: if( (($oldauth =~ /^unix/) && ($umode eq "internal")) ||
1856: (($oldauth =~ /^internal/) && ($umode eq "unix")) ) {
1857: if(&is_author($udom, $uname)) {
1858: &Debug(" Need to manage author permissions...");
1859: &manage_permissions("/$udom/_au", $udom, $uname, "$umode:");
1860: }
1.261 foxr 1861: }
1.287 foxr 1862: &Reply($client, $result, $userinput);
1.261 foxr 1863: }
1864:
1865:
1.225 foxr 1866: } else {
1.251 foxr 1867: &Failure($client, "non_authorized\n", $userinput); # Fail the user now.
1.225 foxr 1868: }
1869: }
1870: return 1;
1871: }
1872: ®ister_handler("changeuserauth", \&change_authentication_handler, 1,1, 0);
1873:
1874: #
1875: # Determines if this is the home server for a user. The home server
1876: # for a user will have his/her lon-capa passwd file. Therefore all we need
1877: # to do is determine if this file exists.
1878: #
1879: # Parameters:
1880: # $cmd - The command that got us here.
1881: # $tail - Tail of the command (remaining parameters).
1882: # $client - File descriptor connected to client.
1883: # Returns
1884: # 0 - Requested to exit, caller should shut down.
1885: # 1 - Continue processing.
1886: # Implicit inputs:
1887: # The authentication systems describe above have their own forms of implicit
1888: # input into the authentication process that are described above.
1889: #
1890: sub is_home_handler {
1891: my ($cmd, $tail, $client) = @_;
1892:
1893: my $userinput = "$cmd:$tail";
1894:
1895: my ($udom,$uname)=split(/:/,$tail);
1896: chomp($uname);
1897: my $passfile = &password_filename($udom, $uname);
1898: if($passfile) {
1899: &Reply( $client, "found\n", $userinput);
1900: } else {
1901: &Failure($client, "not_found\n", $userinput);
1902: }
1903: return 1;
1904: }
1905: ®ister_handler("home", \&is_home_handler, 0,1,0);
1906:
1907: #
1908: # Process an update request for a resource?? I think what's going on here is
1909: # that a resource has been modified that we hold a subscription to.
1910: # If the resource is not local, then we must update, or at least invalidate our
1911: # cached copy of the resource.
1912: # FUTURE WORK:
1913: # I need to look at this logic carefully. My druthers would be to follow
1914: # typical caching logic, and simple invalidate the cache, drop any subscription
1915: # an let the next fetch start the ball rolling again... however that may
1916: # actually be more difficult than it looks given the complex web of
1917: # proxy servers.
1918: # Parameters:
1919: # $cmd - The command that got us here.
1920: # $tail - Tail of the command (remaining parameters).
1921: # $client - File descriptor connected to client.
1922: # Returns
1923: # 0 - Requested to exit, caller should shut down.
1924: # 1 - Continue processing.
1925: # Implicit inputs:
1926: # The authentication systems describe above have their own forms of implicit
1927: # input into the authentication process that are described above.
1928: #
1929: sub update_resource_handler {
1930:
1931: my ($cmd, $tail, $client) = @_;
1932:
1933: my $userinput = "$cmd:$tail";
1934:
1935: my $fname= $tail; # This allows interactive testing
1936:
1937:
1938: my $ownership=ishome($fname);
1939: if ($ownership eq 'not_owner') {
1940: if (-e $fname) {
1941: my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
1942: $atime,$mtime,$ctime,$blksize,$blocks)=stat($fname);
1943: my $now=time;
1944: my $since=$now-$atime;
1945: if ($since>$perlvar{'lonExpire'}) {
1946: my $reply=&reply("unsub:$fname","$clientname");
1.308 ! albertel 1947: &devalidate_meta_cache($fname);
1.225 foxr 1948: unlink("$fname");
1949: } else {
1950: my $transname="$fname.in.transfer";
1951: my $remoteurl=&reply("sub:$fname","$clientname");
1952: my $response;
1953: alarm(120);
1954: {
1955: my $ua=new LWP::UserAgent;
1956: my $request=new HTTP::Request('GET',"$remoteurl");
1957: $response=$ua->request($request,$transname);
1958: }
1959: alarm(0);
1960: if ($response->is_error()) {
1961: unlink($transname);
1962: my $message=$response->status_line;
1963: &logthis("LWP GET: $message for $fname ($remoteurl)");
1964: } else {
1965: if ($remoteurl!~/\.meta$/) {
1966: alarm(120);
1967: {
1968: my $ua=new LWP::UserAgent;
1969: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1970: my $mresponse=$ua->request($mrequest,$fname.'.meta');
1971: if ($mresponse->is_error()) {
1972: unlink($fname.'.meta');
1973: }
1974: }
1975: alarm(0);
1976: }
1977: rename($transname,$fname);
1.308 ! albertel 1978: &devalidate_meta_cache($fname);
1.225 foxr 1979: }
1980: }
1981: &Reply( $client, "ok\n", $userinput);
1982: } else {
1983: &Failure($client, "not_found\n", $userinput);
1984: }
1985: } else {
1986: &Failure($client, "rejected\n", $userinput);
1987: }
1988: return 1;
1989: }
1990: ®ister_handler("update", \&update_resource_handler, 0 ,1, 0);
1991:
1.308 ! albertel 1992: sub devalidate_meta_cache {
! 1993: my ($url) = @_;
! 1994: use Cache::Memcached;
! 1995: my $memcache = new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
! 1996: $url = &declutter($url);
! 1997: $url =~ s-\.meta$--;
! 1998: my $id = &escape('meta:'.$url);
! 1999: $memcache->delete($id);
! 2000: }
! 2001:
! 2002: sub declutter {
! 2003: my $thisfn=shift;
! 2004: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
! 2005: $thisfn=~s/^\///;
! 2006: $thisfn=~s|^adm/wrapper/||;
! 2007: $thisfn=~s|^adm/coursedocs/showdoc/||;
! 2008: $thisfn=~s/^res\///;
! 2009: $thisfn=~s/\?.+$//;
! 2010: return $thisfn;
! 2011: }
1.225 foxr 2012: #
1.226 foxr 2013: # Fetch a user file from a remote server to the user's home directory
2014: # userfiles subdir.
1.225 foxr 2015: # Parameters:
2016: # $cmd - The command that got us here.
2017: # $tail - Tail of the command (remaining parameters).
2018: # $client - File descriptor connected to client.
2019: # Returns
2020: # 0 - Requested to exit, caller should shut down.
2021: # 1 - Continue processing.
2022: #
2023: sub fetch_user_file_handler {
2024:
2025: my ($cmd, $tail, $client) = @_;
2026:
2027: my $userinput = "$cmd:$tail";
2028: my $fname = $tail;
1.232 foxr 2029: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
1.225 foxr 2030: my $udir=&propath($udom,$uname).'/userfiles';
2031: unless (-e $udir) {
2032: mkdir($udir,0770);
2033: }
1.232 foxr 2034: Debug("fetch user file for $fname");
1.225 foxr 2035: if (-e $udir) {
2036: $ufile=~s/^[\.\~]+//;
1.232 foxr 2037:
2038: # IF necessary, create the path right down to the file.
2039: # Note that any regular files in the way of this path are
2040: # wiped out to deal with some earlier folly of mine.
2041:
1.267 raeburn 2042: if (!&mkpath($udir.'/'.$ufile)) {
1.264 albertel 2043: &Failure($client, "unable_to_create\n", $userinput);
1.232 foxr 2044: }
2045:
1.225 foxr 2046: my $destname=$udir.'/'.$ufile;
2047: my $transname=$udir.'/'.$ufile.'.in.transit';
2048: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
2049: my $response;
1.232 foxr 2050: Debug("Remote URL : $remoteurl Transfername $transname Destname: $destname");
1.225 foxr 2051: alarm(120);
2052: {
2053: my $ua=new LWP::UserAgent;
2054: my $request=new HTTP::Request('GET',"$remoteurl");
2055: $response=$ua->request($request,$transname);
2056: }
2057: alarm(0);
2058: if ($response->is_error()) {
2059: unlink($transname);
2060: my $message=$response->status_line;
2061: &logthis("LWP GET: $message for $fname ($remoteurl)");
2062: &Failure($client, "failed\n", $userinput);
2063: } else {
1.232 foxr 2064: Debug("Renaming $transname to $destname");
1.225 foxr 2065: if (!rename($transname,$destname)) {
2066: &logthis("Unable to move $transname to $destname");
2067: unlink($transname);
2068: &Failure($client, "failed\n", $userinput);
2069: } else {
2070: &Reply($client, "ok\n", $userinput);
2071: }
2072: }
2073: } else {
2074: &Failure($client, "not_home\n", $userinput);
2075: }
2076: return 1;
2077: }
2078: ®ister_handler("fetchuserfile", \&fetch_user_file_handler, 0, 1, 0);
2079:
1.226 foxr 2080: #
2081: # Remove a file from a user's home directory userfiles subdirectory.
2082: # Parameters:
2083: # cmd - the Lond request keyword that got us here.
2084: # tail - the part of the command past the keyword.
2085: # client- File descriptor connected with the client.
2086: #
2087: # Returns:
2088: # 1 - Continue processing.
2089: sub remove_user_file_handler {
2090: my ($cmd, $tail, $client) = @_;
2091:
2092: my ($fname) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2093:
2094: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
2095: if ($ufile =~m|/\.\./|) {
2096: # any files paths with /../ in them refuse
2097: # to deal with
2098: &Failure($client, "refused\n", "$cmd:$tail");
2099: } else {
2100: my $udir = &propath($udom,$uname);
2101: if (-e $udir) {
2102: my $file=$udir.'/userfiles/'.$ufile;
2103: if (-e $file) {
1.253 foxr 2104: #
2105: # If the file is a regular file unlink is fine...
2106: # However it's possible the client wants a dir.
2107: # removed, in which case rmdir is more approprate:
2108: #
1.240 banghart 2109: if (-f $file){
1.241 albertel 2110: unlink($file);
2111: } elsif(-d $file) {
2112: rmdir($file);
1.240 banghart 2113: }
1.226 foxr 2114: if (-e $file) {
1.253 foxr 2115: # File is still there after we deleted it ?!?
2116:
1.226 foxr 2117: &Failure($client, "failed\n", "$cmd:$tail");
2118: } else {
2119: &Reply($client, "ok\n", "$cmd:$tail");
2120: }
2121: } else {
2122: &Failure($client, "not_found\n", "$cmd:$tail");
2123: }
2124: } else {
2125: &Failure($client, "not_home\n", "$cmd:$tail");
2126: }
2127: }
2128: return 1;
2129: }
2130: ®ister_handler("removeuserfile", \&remove_user_file_handler, 0,1,0);
2131:
1.236 albertel 2132: #
2133: # make a directory in a user's home directory userfiles subdirectory.
2134: # Parameters:
2135: # cmd - the Lond request keyword that got us here.
2136: # tail - the part of the command past the keyword.
2137: # client- File descriptor connected with the client.
2138: #
2139: # Returns:
2140: # 1 - Continue processing.
2141: sub mkdir_user_file_handler {
2142: my ($cmd, $tail, $client) = @_;
2143:
2144: my ($dir) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2145: $dir=&unescape($dir);
2146: my ($udom,$uname,$ufile) = ($dir =~ m|^([^/]+)/([^/]+)/(.+)$|);
2147: if ($ufile =~m|/\.\./|) {
2148: # any files paths with /../ in them refuse
2149: # to deal with
2150: &Failure($client, "refused\n", "$cmd:$tail");
2151: } else {
2152: my $udir = &propath($udom,$uname);
2153: if (-e $udir) {
1.264 albertel 2154: my $newdir=$udir.'/userfiles/'.$ufile.'/';
2155: if (!&mkpath($newdir)) {
2156: &Failure($client, "failed\n", "$cmd:$tail");
1.236 albertel 2157: }
1.264 albertel 2158: &Reply($client, "ok\n", "$cmd:$tail");
1.236 albertel 2159: } else {
2160: &Failure($client, "not_home\n", "$cmd:$tail");
2161: }
2162: }
2163: return 1;
2164: }
2165: ®ister_handler("mkdiruserfile", \&mkdir_user_file_handler, 0,1,0);
2166:
1.237 albertel 2167: #
2168: # rename a file in a user's home directory userfiles subdirectory.
2169: # Parameters:
2170: # cmd - the Lond request keyword that got us here.
2171: # tail - the part of the command past the keyword.
2172: # client- File descriptor connected with the client.
2173: #
2174: # Returns:
2175: # 1 - Continue processing.
2176: sub rename_user_file_handler {
2177: my ($cmd, $tail, $client) = @_;
2178:
2179: my ($udom,$uname,$old,$new) = split(/:/, $tail);
2180: $old=&unescape($old);
2181: $new=&unescape($new);
2182: if ($new =~m|/\.\./| || $old =~m|/\.\./|) {
2183: # any files paths with /../ in them refuse to deal with
2184: &Failure($client, "refused\n", "$cmd:$tail");
2185: } else {
2186: my $udir = &propath($udom,$uname);
2187: if (-e $udir) {
2188: my $oldfile=$udir.'/userfiles/'.$old;
2189: my $newfile=$udir.'/userfiles/'.$new;
2190: if (-e $newfile) {
2191: &Failure($client, "exists\n", "$cmd:$tail");
2192: } elsif (! -e $oldfile) {
2193: &Failure($client, "not_found\n", "$cmd:$tail");
2194: } else {
2195: if (!rename($oldfile,$newfile)) {
2196: &Failure($client, "failed\n", "$cmd:$tail");
2197: } else {
2198: &Reply($client, "ok\n", "$cmd:$tail");
2199: }
2200: }
2201: } else {
2202: &Failure($client, "not_home\n", "$cmd:$tail");
2203: }
2204: }
2205: return 1;
2206: }
2207: ®ister_handler("renameuserfile", \&rename_user_file_handler, 0,1,0);
2208:
1.227 foxr 2209: #
1.263 albertel 2210: # Authenticate access to a user file by checking that the token the user's
2211: # passed also exists in their session file
1.227 foxr 2212: #
2213: # Parameters:
2214: # cmd - The request keyword that dispatched to tus.
2215: # tail - The tail of the request (colon separated parameters).
2216: # client - Filehandle open on the client.
2217: # Return:
2218: # 1.
2219: sub token_auth_user_file_handler {
2220: my ($cmd, $tail, $client) = @_;
2221:
2222: my ($fname, $session) = split(/:/, $tail);
2223:
2224: chomp($session);
1.251 foxr 2225: my $reply="non_auth\n";
1.227 foxr 2226: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
2227: $session.'.id')) {
2228: while (my $line=<ENVIN>) {
1.251 foxr 2229: if ($line=~ m|userfile\.\Q$fname\E\=|) { $reply="ok\n"; }
1.227 foxr 2230: }
2231: close(ENVIN);
1.251 foxr 2232: &Reply($client, $reply, "$cmd:$tail");
1.227 foxr 2233: } else {
2234: &Failure($client, "invalid_token\n", "$cmd:$tail");
2235: }
2236: return 1;
2237:
2238: }
2239: ®ister_handler("tokenauthuserfile", \&token_auth_user_file_handler, 0,1,0);
1.229 foxr 2240:
2241: #
2242: # Unsubscribe from a resource.
2243: #
2244: # Parameters:
2245: # $cmd - The command that got us here.
2246: # $tail - Tail of the command (remaining parameters).
2247: # $client - File descriptor connected to client.
2248: # Returns
2249: # 0 - Requested to exit, caller should shut down.
2250: # 1 - Continue processing.
2251: #
2252: sub unsubscribe_handler {
2253: my ($cmd, $tail, $client) = @_;
2254:
2255: my $userinput= "$cmd:$tail";
2256:
2257: my ($fname) = split(/:/,$tail); # Split in case there's extrs.
2258:
2259: &Debug("Unsubscribing $fname");
2260: if (-e $fname) {
2261: &Debug("Exists");
2262: &Reply($client, &unsub($fname,$clientip), $userinput);
2263: } else {
2264: &Failure($client, "not_found\n", $userinput);
2265: }
2266: return 1;
2267: }
2268: ®ister_handler("unsub", \&unsubscribe_handler, 0, 1, 0);
1.263 albertel 2269:
1.230 foxr 2270: # Subscribe to a resource
2271: #
2272: # Parameters:
2273: # $cmd - The command that got us here.
2274: # $tail - Tail of the command (remaining parameters).
2275: # $client - File descriptor connected to client.
2276: # Returns
2277: # 0 - Requested to exit, caller should shut down.
2278: # 1 - Continue processing.
2279: #
2280: sub subscribe_handler {
2281: my ($cmd, $tail, $client)= @_;
2282:
2283: my $userinput = "$cmd:$tail";
2284:
2285: &Reply( $client, &subscribe($userinput,$clientip), $userinput);
2286:
2287: return 1;
2288: }
2289: ®ister_handler("sub", \&subscribe_handler, 0, 1, 0);
2290:
2291: #
2292: # Determine the version of a resource (?) Or is it return
2293: # the top version of the resource? Not yet clear from the
2294: # code in currentversion.
2295: #
2296: # Parameters:
2297: # $cmd - The command that got us here.
2298: # $tail - Tail of the command (remaining parameters).
2299: # $client - File descriptor connected to client.
2300: # Returns
2301: # 0 - Requested to exit, caller should shut down.
2302: # 1 - Continue processing.
2303: #
2304: sub current_version_handler {
2305: my ($cmd, $tail, $client) = @_;
2306:
2307: my $userinput= "$cmd:$tail";
2308:
2309: my $fname = $tail;
2310: &Reply( $client, ¤tversion($fname)."\n", $userinput);
2311: return 1;
2312:
2313: }
2314: ®ister_handler("currentversion", \¤t_version_handler, 0, 1, 0);
2315:
2316: # Make an entry in a user's activity log.
2317: #
2318: # Parameters:
2319: # $cmd - The command that got us here.
2320: # $tail - Tail of the command (remaining parameters).
2321: # $client - File descriptor connected to client.
2322: # Returns
2323: # 0 - Requested to exit, caller should shut down.
2324: # 1 - Continue processing.
2325: #
2326: sub activity_log_handler {
2327: my ($cmd, $tail, $client) = @_;
2328:
2329:
2330: my $userinput= "$cmd:$tail";
2331:
2332: my ($udom,$uname,$what)=split(/:/,$tail);
2333: chomp($what);
2334: my $proname=&propath($udom,$uname);
2335: my $now=time;
2336: my $hfh;
2337: if ($hfh=IO::File->new(">>$proname/activity.log")) {
2338: print $hfh "$now:$clientname:$what\n";
2339: &Reply( $client, "ok\n", $userinput);
2340: } else {
2341: &Failure($client, "error: ".($!+0)." IO::File->new Failed "
2342: ."while attempting log\n",
2343: $userinput);
2344: }
2345:
2346: return 1;
2347: }
1.263 albertel 2348: ®ister_handler("log", \&activity_log_handler, 0, 1, 0);
1.230 foxr 2349:
2350: #
2351: # Put a namespace entry in a user profile hash.
2352: # My druthers would be for this to be an encrypted interaction too.
2353: # anything that might be an inadvertent covert channel about either
2354: # user authentication or user personal information....
2355: #
2356: # Parameters:
2357: # $cmd - The command that got us here.
2358: # $tail - Tail of the command (remaining parameters).
2359: # $client - File descriptor connected to client.
2360: # Returns
2361: # 0 - Requested to exit, caller should shut down.
2362: # 1 - Continue processing.
2363: #
2364: sub put_user_profile_entry {
2365: my ($cmd, $tail, $client) = @_;
1.229 foxr 2366:
1.230 foxr 2367: my $userinput = "$cmd:$tail";
2368:
1.242 raeburn 2369: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
1.230 foxr 2370: if ($namespace ne 'roles') {
2371: chomp($what);
2372: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2373: &GDBM_WRCREAT(),"P",$what);
2374: if($hashref) {
2375: my @pairs=split(/\&/,$what);
2376: foreach my $pair (@pairs) {
2377: my ($key,$value)=split(/=/,$pair);
2378: $hashref->{$key}=$value;
2379: }
2380: if (untie(%$hashref)) {
2381: &Reply( $client, "ok\n", $userinput);
2382: } else {
2383: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2384: "while attempting put\n",
2385: $userinput);
2386: }
2387: } else {
2388: &Failure( $client, "error: ".($!)." tie(GDBM) Failed ".
2389: "while attempting put\n", $userinput);
2390: }
2391: } else {
2392: &Failure( $client, "refused\n", $userinput);
2393: }
2394:
2395: return 1;
2396: }
2397: ®ister_handler("put", \&put_user_profile_entry, 0, 1, 0);
2398:
1.283 albertel 2399: # Put a piece of new data in hash, returns error if entry already exists
2400: # Parameters:
2401: # $cmd - The command that got us here.
2402: # $tail - Tail of the command (remaining parameters).
2403: # $client - File descriptor connected to client.
2404: # Returns
2405: # 0 - Requested to exit, caller should shut down.
2406: # 1 - Continue processing.
2407: #
2408: sub newput_user_profile_entry {
2409: my ($cmd, $tail, $client) = @_;
2410:
2411: my $userinput = "$cmd:$tail";
2412:
2413: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
2414: if ($namespace eq 'roles') {
2415: &Failure( $client, "refused\n", $userinput);
2416: return 1;
2417: }
2418:
2419: chomp($what);
2420:
2421: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2422: &GDBM_WRCREAT(),"N",$what);
2423: if(!$hashref) {
2424: &Failure( $client, "error: ".($!)." tie(GDBM) Failed ".
2425: "while attempting put\n", $userinput);
2426: return 1;
2427: }
2428:
2429: my @pairs=split(/\&/,$what);
2430: foreach my $pair (@pairs) {
2431: my ($key,$value)=split(/=/,$pair);
2432: if (exists($hashref->{$key})) {
2433: &Failure($client, "key_exists: ".$key."\n",$userinput);
2434: return 1;
2435: }
2436: }
2437:
2438: foreach my $pair (@pairs) {
2439: my ($key,$value)=split(/=/,$pair);
2440: $hashref->{$key}=$value;
2441: }
2442:
2443: if (untie(%$hashref)) {
2444: &Reply( $client, "ok\n", $userinput);
2445: } else {
2446: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2447: "while attempting put\n",
2448: $userinput);
2449: }
2450: return 1;
2451: }
2452: ®ister_handler("newput", \&newput_user_profile_entry, 0, 1, 0);
2453:
1.230 foxr 2454: #
2455: # Increment a profile entry in the user history file.
2456: # The history contains keyword value pairs. In this case,
2457: # The value itself is a pair of numbers. The first, the current value
2458: # the second an increment that this function applies to the current
2459: # value.
2460: #
2461: # Parameters:
2462: # $cmd - The command that got us here.
2463: # $tail - Tail of the command (remaining parameters).
2464: # $client - File descriptor connected to client.
2465: # Returns
2466: # 0 - Requested to exit, caller should shut down.
2467: # 1 - Continue processing.
2468: #
2469: sub increment_user_value_handler {
2470: my ($cmd, $tail, $client) = @_;
2471:
2472: my $userinput = "$cmd:$tail";
2473:
2474: my ($udom,$uname,$namespace,$what) =split(/:/,$tail);
2475: if ($namespace ne 'roles') {
2476: chomp($what);
2477: my $hashref = &tie_user_hash($udom, $uname,
2478: $namespace, &GDBM_WRCREAT(),
2479: "P",$what);
2480: if ($hashref) {
2481: my @pairs=split(/\&/,$what);
2482: foreach my $pair (@pairs) {
2483: my ($key,$value)=split(/=/,$pair);
1.284 raeburn 2484: $value = &unescape($value);
1.230 foxr 2485: # We could check that we have a number...
2486: if (! defined($value) || $value eq '') {
2487: $value = 1;
2488: }
2489: $hashref->{$key}+=$value;
1.284 raeburn 2490: if ($namespace eq 'nohist_resourcetracker') {
2491: if ($hashref->{$key} < 0) {
2492: $hashref->{$key} = 0;
2493: }
2494: }
1.230 foxr 2495: }
2496: if (untie(%$hashref)) {
2497: &Reply( $client, "ok\n", $userinput);
2498: } else {
2499: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2500: "while attempting inc\n", $userinput);
2501: }
2502: } else {
2503: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2504: "while attempting inc\n", $userinput);
2505: }
2506: } else {
2507: &Failure($client, "refused\n", $userinput);
2508: }
2509:
2510: return 1;
2511: }
2512: ®ister_handler("inc", \&increment_user_value_handler, 0, 1, 0);
2513:
2514: #
2515: # Put a new role for a user. Roles are LonCAPA's packaging of permissions.
2516: # Each 'role' a user has implies a set of permissions. Adding a new role
2517: # for a person grants the permissions packaged with that role
2518: # to that user when the role is selected.
2519: #
2520: # Parameters:
2521: # $cmd - The command string (rolesput).
2522: # $tail - The remainder of the request line. For rolesput this
2523: # consists of a colon separated list that contains:
2524: # The domain and user that is granting the role (logged).
2525: # The domain and user that is getting the role.
2526: # The roles being granted as a set of & separated pairs.
2527: # each pair a key value pair.
2528: # $client - File descriptor connected to the client.
2529: # Returns:
2530: # 0 - If the daemon should exit
2531: # 1 - To continue processing.
2532: #
2533: #
2534: sub roles_put_handler {
2535: my ($cmd, $tail, $client) = @_;
2536:
2537: my $userinput = "$cmd:$tail";
2538:
2539: my ( $exedom, $exeuser, $udom, $uname, $what) = split(/:/,$tail);
2540:
2541:
2542: my $namespace='roles';
2543: chomp($what);
2544: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2545: &GDBM_WRCREAT(), "P",
2546: "$exedom:$exeuser:$what");
2547: #
2548: # Log the attempt to set a role. The {}'s here ensure that the file
2549: # handle is open for the minimal amount of time. Since the flush
2550: # is done on close this improves the chances the log will be an un-
2551: # corrupted ordered thing.
2552: if ($hashref) {
1.261 foxr 2553: my $pass_entry = &get_auth_type($udom, $uname);
2554: my ($auth_type,$pwd) = split(/:/, $pass_entry);
2555: $auth_type = $auth_type.":";
1.230 foxr 2556: my @pairs=split(/\&/,$what);
2557: foreach my $pair (@pairs) {
2558: my ($key,$value)=split(/=/,$pair);
2559: &manage_permissions($key, $udom, $uname,
1.260 foxr 2560: $auth_type);
1.230 foxr 2561: $hashref->{$key}=$value;
2562: }
2563: if (untie($hashref)) {
2564: &Reply($client, "ok\n", $userinput);
2565: } else {
2566: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2567: "while attempting rolesput\n", $userinput);
2568: }
2569: } else {
2570: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2571: "while attempting rolesput\n", $userinput);
2572: }
2573: return 1;
2574: }
2575: ®ister_handler("rolesput", \&roles_put_handler, 1,1,0); # Encoded client only.
2576:
2577: #
1.231 foxr 2578: # Deletes (removes) a role for a user. This is equivalent to removing
2579: # a permissions package associated with the role from the user's profile.
2580: #
2581: # Parameters:
2582: # $cmd - The command (rolesdel)
2583: # $tail - The remainder of the request line. This consists
2584: # of:
2585: # The domain and user requesting the change (logged)
2586: # The domain and user being changed.
2587: # The roles being revoked. These are shipped to us
2588: # as a bunch of & separated role name keywords.
2589: # $client - The file handle open on the client.
2590: # Returns:
2591: # 1 - Continue processing
2592: # 0 - Exit.
2593: #
2594: sub roles_delete_handler {
2595: my ($cmd, $tail, $client) = @_;
2596:
2597: my $userinput = "$cmd:$tail";
2598:
2599: my ($exedom,$exeuser,$udom,$uname,$what)=split(/:/,$tail);
2600: &Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom.
2601: "what = ".$what);
2602: my $namespace='roles';
2603: chomp($what);
2604: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2605: &GDBM_WRCREAT(), "D",
2606: "$exedom:$exeuser:$what");
2607:
2608: if ($hashref) {
2609: my @rolekeys=split(/\&/,$what);
2610:
2611: foreach my $key (@rolekeys) {
2612: delete $hashref->{$key};
2613: }
2614: if (untie(%$hashref)) {
2615: &Reply($client, "ok\n", $userinput);
2616: } else {
2617: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2618: "while attempting rolesdel\n", $userinput);
2619: }
2620: } else {
2621: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2622: "while attempting rolesdel\n", $userinput);
2623: }
2624:
2625: return 1;
2626: }
2627: ®ister_handler("rolesdel", \&roles_delete_handler, 1,1, 0); # Encoded client only
2628:
2629: # Unencrypted get from a user's profile database. See
2630: # GetProfileEntryEncrypted for a version that does end-to-end encryption.
2631: # This function retrieves a keyed item from a specific named database in the
2632: # user's directory.
2633: #
2634: # Parameters:
2635: # $cmd - Command request keyword (get).
2636: # $tail - Tail of the command. This is a colon separated list
2637: # consisting of the domain and username that uniquely
2638: # identifies the profile,
2639: # The 'namespace' which selects the gdbm file to
2640: # do the lookup in,
2641: # & separated list of keys to lookup. Note that
2642: # the values are returned as an & separated list too.
2643: # $client - File descriptor open on the client.
2644: # Returns:
2645: # 1 - Continue processing.
2646: # 0 - Exit.
2647: #
2648: sub get_profile_entry {
2649: my ($cmd, $tail, $client) = @_;
2650:
2651: my $userinput= "$cmd:$tail";
2652:
2653: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2654: chomp($what);
1.255 foxr 2655:
2656: my $replystring = read_profile($udom, $uname, $namespace, $what);
2657: my ($first) = split(/:/,$replystring);
2658: if($first ne "error") {
2659: &Reply($client, "$replystring\n", $userinput);
1.231 foxr 2660: } else {
1.255 foxr 2661: &Failure($client, $replystring." while attempting get\n", $userinput);
1.231 foxr 2662: }
2663: return 1;
1.255 foxr 2664:
2665:
1.231 foxr 2666: }
2667: ®ister_handler("get", \&get_profile_entry, 0,1,0);
2668:
2669: #
2670: # Process the encrypted get request. Note that the request is sent
2671: # in clear, but the reply is encrypted. This is a small covert channel:
2672: # information about the sensitive keys is given to the snooper. Just not
2673: # information about the values of the sensitive key. Hmm if I wanted to
2674: # know these I'd snoop for the egets. Get the profile item names from them
2675: # and then issue a get for them since there's no enforcement of the
2676: # requirement of an encrypted get for particular profile items. If I
2677: # were re-doing this, I'd force the request to be encrypted as well as the
2678: # reply. I'd also just enforce encrypted transactions for all gets since
2679: # that would prevent any covert channel snooping.
2680: #
2681: # Parameters:
2682: # $cmd - Command keyword of request (eget).
2683: # $tail - Tail of the command. See GetProfileEntry
# for more information about this.
2684: # $client - File open on the client.
2685: # Returns:
2686: # 1 - Continue processing
2687: # 0 - server should exit.
2688: sub get_profile_entry_encrypted {
2689: my ($cmd, $tail, $client) = @_;
2690:
2691: my $userinput = "$cmd:$tail";
2692:
2693: my ($cmd,$udom,$uname,$namespace,$what) = split(/:/,$userinput);
2694: chomp($what);
1.255 foxr 2695: my $qresult = read_profile($udom, $uname, $namespace, $what);
2696: my ($first) = split(/:/, $qresult);
2697: if($first ne "error") {
2698:
2699: if ($cipher) {
2700: my $cmdlength=length($qresult);
2701: $qresult.=" ";
2702: my $encqresult='';
2703: for(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
2704: $encqresult.= unpack("H16",
2705: $cipher->encrypt(substr($qresult,
2706: $encidx,
2707: 8)));
2708: }
2709: &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput);
2710: } else {
1.231 foxr 2711: &Failure( $client, "error:no_key\n", $userinput);
2712: }
2713: } else {
1.255 foxr 2714: &Failure($client, "$qresult while attempting eget\n", $userinput);
2715:
1.231 foxr 2716: }
2717:
2718: return 1;
2719: }
1.255 foxr 2720: ®ister_handler("eget", \&get_profile_entry_encrypted, 0, 1, 0);
1.263 albertel 2721:
1.231 foxr 2722: #
2723: # Deletes a key in a user profile database.
2724: #
2725: # Parameters:
2726: # $cmd - Command keyword (del).
2727: # $tail - Command tail. IN this case a colon
2728: # separated list containing:
2729: # The domain and user that identifies uniquely
2730: # the identity of the user.
2731: # The profile namespace (name of the profile
2732: # database file).
2733: # & separated list of keywords to delete.
2734: # $client - File open on client socket.
2735: # Returns:
2736: # 1 - Continue processing
2737: # 0 - Exit server.
2738: #
2739: #
2740: sub delete_profile_entry {
2741: my ($cmd, $tail, $client) = @_;
2742:
2743: my $userinput = "cmd:$tail";
2744:
2745: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2746: chomp($what);
2747: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2748: &GDBM_WRCREAT(),
2749: "D",$what);
2750: if ($hashref) {
2751: my @keys=split(/\&/,$what);
2752: foreach my $key (@keys) {
2753: delete($hashref->{$key});
2754: }
2755: if (untie(%$hashref)) {
2756: &Reply($client, "ok\n", $userinput);
2757: } else {
2758: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2759: "while attempting del\n", $userinput);
2760: }
2761: } else {
2762: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2763: "while attempting del\n", $userinput);
2764: }
2765: return 1;
2766: }
2767: ®ister_handler("del", \&delete_profile_entry, 0, 1, 0);
1.263 albertel 2768:
1.231 foxr 2769: #
2770: # List the set of keys that are defined in a profile database file.
2771: # A successful reply from this will contain an & separated list of
2772: # the keys.
2773: # Parameters:
2774: # $cmd - Command request (keys).
2775: # $tail - Remainder of the request, a colon separated
2776: # list containing domain/user that identifies the
2777: # user being queried, and the database namespace
2778: # (database filename essentially).
2779: # $client - File open on the client.
2780: # Returns:
2781: # 1 - Continue processing.
2782: # 0 - Exit the server.
2783: #
2784: sub get_profile_keys {
2785: my ($cmd, $tail, $client) = @_;
2786:
2787: my $userinput = "$cmd:$tail";
2788:
2789: my ($udom,$uname,$namespace)=split(/:/,$tail);
2790: my $qresult='';
2791: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2792: &GDBM_READER());
2793: if ($hashref) {
2794: foreach my $key (keys %$hashref) {
2795: $qresult.="$key&";
2796: }
2797: if (untie(%$hashref)) {
2798: $qresult=~s/\&$//;
2799: &Reply($client, "$qresult\n", $userinput);
2800: } else {
2801: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2802: "while attempting keys\n", $userinput);
2803: }
2804: } else {
2805: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2806: "while attempting keys\n", $userinput);
2807: }
2808:
2809: return 1;
2810: }
2811: ®ister_handler("keys", \&get_profile_keys, 0, 1, 0);
2812:
2813: #
2814: # Dump the contents of a user profile database.
2815: # Note that this constitutes a very large covert channel too since
2816: # the dump will return sensitive information that is not encrypted.
2817: # The naive security assumption is that the session negotiation ensures
2818: # our client is trusted and I don't believe that's assured at present.
2819: # Sure want badly to go to ssl or tls. Of course if my peer isn't really
2820: # a LonCAPA node they could have negotiated an encryption key too so >sigh<.
2821: #
2822: # Parameters:
2823: # $cmd - The command request keyword (currentdump).
2824: # $tail - Remainder of the request, consisting of a colon
2825: # separated list that has the domain/username and
2826: # the namespace to dump (database file).
2827: # $client - file open on the remote client.
2828: # Returns:
2829: # 1 - Continue processing.
2830: # 0 - Exit the server.
2831: #
2832: sub dump_profile_database {
2833: my ($cmd, $tail, $client) = @_;
2834:
2835: my $userinput = "$cmd:$tail";
2836:
2837: my ($udom,$uname,$namespace) = split(/:/,$tail);
2838: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2839: &GDBM_READER());
2840: if ($hashref) {
2841: # Structure of %data:
2842: # $data{$symb}->{$parameter}=$value;
2843: # $data{$symb}->{'v.'.$parameter}=$version;
2844: # since $parameter will be unescaped, we do not
2845: # have to worry about silly parameter names...
2846:
2847: my $qresult='';
2848: my %data = (); # A hash of anonymous hashes..
2849: while (my ($key,$value) = each(%$hashref)) {
2850: my ($v,$symb,$param) = split(/:/,$key);
2851: next if ($v eq 'version' || $symb eq 'keys');
2852: next if (exists($data{$symb}) &&
2853: exists($data{$symb}->{$param}) &&
2854: $data{$symb}->{'v.'.$param} > $v);
2855: $data{$symb}->{$param}=$value;
2856: $data{$symb}->{'v.'.$param}=$v;
2857: }
2858: if (untie(%$hashref)) {
2859: while (my ($symb,$param_hash) = each(%data)) {
2860: while(my ($param,$value) = each (%$param_hash)){
2861: next if ($param =~ /^v\./); # Ignore versions...
2862: #
2863: # Just dump the symb=value pairs separated by &
2864: #
2865: $qresult.=$symb.':'.$param.'='.$value.'&';
2866: }
2867: }
2868: chop($qresult);
2869: &Reply($client , "$qresult\n", $userinput);
2870: } else {
2871: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2872: "while attempting currentdump\n", $userinput);
2873: }
2874: } else {
2875: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2876: "while attempting currentdump\n", $userinput);
2877: }
2878:
2879: return 1;
2880: }
2881: ®ister_handler("currentdump", \&dump_profile_database, 0, 1, 0);
2882:
2883: #
2884: # Dump a profile database with an optional regular expression
2885: # to match against the keys. In this dump, no effort is made
2886: # to separate symb from version information. Presumably the
2887: # databases that are dumped by this command are of a different
2888: # structure. Need to look at this and improve the documentation of
2889: # both this and the currentdump handler.
2890: # Parameters:
2891: # $cmd - The command keyword.
2892: # $tail - All of the characters after the $cmd:
2893: # These are expected to be a colon
2894: # separated list containing:
2895: # domain/user - identifying the user.
2896: # namespace - identifying the database.
2897: # regexp - optional regular expression
2898: # that is matched against
2899: # database keywords to do
2900: # selective dumps.
2901: # $client - Channel open on the client.
2902: # Returns:
2903: # 1 - Continue processing.
2904: # Side effects:
2905: # response is written to $client.
2906: #
2907: sub dump_with_regexp {
2908: my ($cmd, $tail, $client) = @_;
2909:
2910:
2911: my $userinput = "$cmd:$tail";
2912:
1.306 albertel 2913: my ($udom,$uname,$namespace,$regexp,$range)=split(/:/,$tail);
1.231 foxr 2914: if (defined($regexp)) {
2915: $regexp=&unescape($regexp);
2916: } else {
2917: $regexp='.';
2918: }
1.306 albertel 2919: my ($start,$end);
2920: if (defined($range)) {
2921: if ($range =~/^(\d+)\-(\d+)$/) {
2922: ($start,$end) = ($1,$2);
2923: } elsif ($range =~/^(\d+)$/) {
2924: ($start,$end) = (0,$1);
2925: } else {
2926: undef($range);
2927: }
2928: }
1.231 foxr 2929: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2930: &GDBM_READER());
2931: if ($hashref) {
2932: my $qresult='';
1.306 albertel 2933: my $count=0;
1.231 foxr 2934: while (my ($key,$value) = each(%$hashref)) {
2935: if ($regexp eq '.') {
1.306 albertel 2936: $count++;
2937: if (defined($range) && $count >= $end) { last; }
2938: if (defined($range) && $count < $start) { next; }
1.231 foxr 2939: $qresult.=$key.'='.$value.'&';
2940: } else {
2941: my $unescapeKey = &unescape($key);
2942: if (eval('$unescapeKey=~/$regexp/')) {
1.306 albertel 2943: $count++;
2944: if (defined($range) && $count >= $end) { last; }
2945: if (defined($range) && $count < $start) { next; }
1.231 foxr 2946: $qresult.="$key=$value&";
2947: }
2948: }
2949: }
2950: if (untie(%$hashref)) {
2951: chop($qresult);
2952: &Reply($client, "$qresult\n", $userinput);
2953: } else {
2954: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2955: "while attempting dump\n", $userinput);
2956: }
2957: } else {
2958: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2959: "while attempting dump\n", $userinput);
2960: }
2961:
2962: return 1;
2963: }
2964: ®ister_handler("dump", \&dump_with_regexp, 0, 1, 0);
2965:
2966: # Store a set of key=value pairs associated with a versioned name.
2967: #
2968: # Parameters:
2969: # $cmd - Request command keyword.
2970: # $tail - Tail of the request. This is a colon
2971: # separated list containing:
2972: # domain/user - User and authentication domain.
2973: # namespace - Name of the database being modified
2974: # rid - Resource keyword to modify.
2975: # what - new value associated with rid.
2976: #
2977: # $client - Socket open on the client.
2978: #
2979: #
2980: # Returns:
2981: # 1 (keep on processing).
2982: # Side-Effects:
2983: # Writes to the client
2984: sub store_handler {
2985: my ($cmd, $tail, $client) = @_;
2986:
2987: my $userinput = "$cmd:$tail";
2988:
2989: my ($udom,$uname,$namespace,$rid,$what) =split(/:/,$tail);
2990: if ($namespace ne 'roles') {
2991:
2992: chomp($what);
2993: my @pairs=split(/\&/,$what);
2994: my $hashref = &tie_user_hash($udom, $uname, $namespace,
1.268 albertel 2995: &GDBM_WRCREAT(), "S",
1.231 foxr 2996: "$rid:$what");
2997: if ($hashref) {
2998: my $now = time;
2999: my @previouskeys=split(/&/,$hashref->{"keys:$rid"});
3000: my $key;
3001: $hashref->{"version:$rid"}++;
3002: my $version=$hashref->{"version:$rid"};
3003: my $allkeys='';
3004: foreach my $pair (@pairs) {
3005: my ($key,$value)=split(/=/,$pair);
3006: $allkeys.=$key.':';
3007: $hashref->{"$version:$rid:$key"}=$value;
3008: }
3009: $hashref->{"$version:$rid:timestamp"}=$now;
3010: $allkeys.='timestamp';
3011: $hashref->{"$version:keys:$rid"}=$allkeys;
3012: if (untie($hashref)) {
3013: &Reply($client, "ok\n", $userinput);
3014: } else {
3015: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3016: "while attempting store\n", $userinput);
3017: }
3018: } else {
3019: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3020: "while attempting store\n", $userinput);
3021: }
3022: } else {
3023: &Failure($client, "refused\n", $userinput);
3024: }
3025:
3026: return 1;
3027: }
3028: ®ister_handler("store", \&store_handler, 0, 1, 0);
1.263 albertel 3029:
1.231 foxr 3030: #
3031: # Dump out all versions of a resource that has key=value pairs associated
3032: # with it for each version. These resources are built up via the store
3033: # command.
3034: #
3035: # Parameters:
3036: # $cmd - Command keyword.
3037: # $tail - Remainder of the request which consists of:
3038: # domain/user - User and auth. domain.
3039: # namespace - name of resource database.
3040: # rid - Resource id.
3041: # $client - socket open on the client.
3042: #
3043: # Returns:
3044: # 1 indicating the caller should not yet exit.
3045: # Side-effects:
3046: # Writes a reply to the client.
3047: # The reply is a string of the following shape:
3048: # version=current&version:keys=k1:k2...&1:k1=v1&1:k2=v2...
3049: # Where the 1 above represents version 1.
3050: # this continues for all pairs of keys in all versions.
3051: #
3052: #
3053: #
3054: #
3055: sub restore_handler {
3056: my ($cmd, $tail, $client) = @_;
3057:
3058: my $userinput = "$cmd:$tail"; # Only used for logging purposes.
3059:
3060: my ($cmd,$udom,$uname,$namespace,$rid) = split(/:/,$userinput);
3061: $namespace=~s/\//\_/g;
3062: $namespace=~s/\W//g;
3063: chomp($rid);
3064: my $proname=&propath($udom,$uname);
3065: my $qresult='';
3066: my %hash;
3067: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",
3068: &GDBM_READER(),0640)) {
3069: my $version=$hash{"version:$rid"};
3070: $qresult.="version=$version&";
3071: my $scope;
3072: for ($scope=1;$scope<=$version;$scope++) {
3073: my $vkeys=$hash{"$scope:keys:$rid"};
3074: my @keys=split(/:/,$vkeys);
3075: my $key;
3076: $qresult.="$scope:keys=$vkeys&";
3077: foreach $key (@keys) {
3078: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
3079: }
3080: }
3081: if (untie(%hash)) {
3082: $qresult=~s/\&$//;
3083: &Reply( $client, "$qresult\n", $userinput);
3084: } else {
3085: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3086: "while attempting restore\n", $userinput);
3087: }
3088: } else {
3089: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3090: "while attempting restore\n", $userinput);
3091: }
3092:
3093: return 1;
3094:
3095:
3096: }
3097: ®ister_handler("restore", \&restore_handler, 0,1,0);
1.234 foxr 3098:
3099: #
3100: # Add a chat message to to a discussion board.
3101: #
3102: # Parameters:
3103: # $cmd - Request keyword.
3104: # $tail - Tail of the command. A colon separated list
3105: # containing:
3106: # cdom - Domain on which the chat board lives
3107: # cnum - Identifier of the discussion group.
3108: # post - Body of the posting.
3109: # $client - Socket open on the client.
3110: # Returns:
3111: # 1 - Indicating caller should keep on processing.
3112: #
3113: # Side-effects:
3114: # writes a reply to the client.
3115: #
3116: #
3117: sub send_chat_handler {
3118: my ($cmd, $tail, $client) = @_;
3119:
3120:
3121: my $userinput = "$cmd:$tail";
3122:
3123: my ($cdom,$cnum,$newpost)=split(/\:/,$tail);
3124: &chat_add($cdom,$cnum,$newpost);
3125: &Reply($client, "ok\n", $userinput);
3126:
3127: return 1;
3128: }
3129: ®ister_handler("chatsend", \&send_chat_handler, 0, 1, 0);
1.263 albertel 3130:
1.234 foxr 3131: #
3132: # Retrieve the set of chat messagss from a discussion board.
3133: #
3134: # Parameters:
3135: # $cmd - Command keyword that initiated the request.
3136: # $tail - Remainder of the request after the command
3137: # keyword. In this case a colon separated list of
3138: # chat domain - Which discussion board.
3139: # chat id - Discussion thread(?)
3140: # domain/user - Authentication domain and username
3141: # of the requesting person.
3142: # $client - Socket open on the client program.
3143: # Returns:
3144: # 1 - continue processing
3145: # Side effects:
3146: # Response is written to the client.
3147: #
3148: sub retrieve_chat_handler {
3149: my ($cmd, $tail, $client) = @_;
3150:
3151:
3152: my $userinput = "$cmd:$tail";
3153:
3154: my ($cdom,$cnum,$udom,$uname)=split(/\:/,$tail);
3155: my $reply='';
3156: foreach (&get_chat($cdom,$cnum,$udom,$uname)) {
3157: $reply.=&escape($_).':';
3158: }
3159: $reply=~s/\:$//;
3160: &Reply($client, $reply."\n", $userinput);
3161:
3162:
3163: return 1;
3164: }
3165: ®ister_handler("chatretr", \&retrieve_chat_handler, 0, 1, 0);
3166:
3167: #
3168: # Initiate a query of an sql database. SQL query repsonses get put in
3169: # a file for later retrieval. This prevents sql query results from
3170: # bottlenecking the system. Note that with loncnew, perhaps this is
3171: # less of an issue since multiple outstanding requests can be concurrently
3172: # serviced.
3173: #
3174: # Parameters:
3175: # $cmd - COmmand keyword that initiated the request.
3176: # $tail - Remainder of the command after the keyword.
3177: # For this function, this consists of a query and
3178: # 3 arguments that are self-documentingly labelled
3179: # in the original arg1, arg2, arg3.
3180: # $client - Socket open on the client.
3181: # Return:
3182: # 1 - Indicating processing should continue.
3183: # Side-effects:
3184: # a reply is written to $client.
3185: #
3186: sub send_query_handler {
3187: my ($cmd, $tail, $client) = @_;
3188:
3189:
3190: my $userinput = "$cmd:$tail";
3191:
3192: my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail);
3193: $query=~s/\n*$//g;
3194: &Reply($client, "". &sql_reply("$clientname\&$query".
3195: "\&$arg1"."\&$arg2"."\&$arg3")."\n",
3196: $userinput);
3197:
3198: return 1;
3199: }
3200: ®ister_handler("querysend", \&send_query_handler, 0, 1, 0);
3201:
3202: #
3203: # Add a reply to an sql query. SQL queries are done asyncrhonously.
3204: # The query is submitted via a "querysend" transaction.
3205: # There it is passed on to the lonsql daemon, queued and issued to
3206: # mysql.
3207: # This transaction is invoked when the sql transaction is complete
3208: # it stores the query results in flie and indicates query completion.
3209: # presumably local software then fetches this response... I'm guessing
3210: # the sequence is: lonc does a querysend, we ask lonsql to do it.
3211: # lonsql on completion of the query interacts with the lond of our
3212: # client to do a query reply storing two files:
3213: # - id - The results of the query.
3214: # - id.end - Indicating the transaction completed.
3215: # NOTE: id is a unique id assigned to the query and querysend time.
3216: # Parameters:
3217: # $cmd - Command keyword that initiated this request.
3218: # $tail - Remainder of the tail. In this case that's a colon
3219: # separated list containing the query Id and the
3220: # results of the query.
3221: # $client - Socket open on the client.
3222: # Return:
3223: # 1 - Indicating that we should continue processing.
3224: # Side effects:
3225: # ok written to the client.
3226: #
3227: sub reply_query_handler {
3228: my ($cmd, $tail, $client) = @_;
3229:
3230:
3231: my $userinput = "$cmd:$tail";
3232:
3233: my ($cmd,$id,$reply)=split(/:/,$userinput);
3234: my $store;
3235: my $execdir=$perlvar{'lonDaemons'};
3236: if ($store=IO::File->new(">$execdir/tmp/$id")) {
3237: $reply=~s/\&/\n/g;
3238: print $store $reply;
3239: close $store;
3240: my $store2=IO::File->new(">$execdir/tmp/$id.end");
3241: print $store2 "done\n";
3242: close $store2;
3243: &Reply($client, "ok\n", $userinput);
3244: } else {
3245: &Failure($client, "error: ".($!+0)
3246: ." IO::File->new Failed ".
3247: "while attempting queryreply\n", $userinput);
3248: }
3249:
3250:
3251: return 1;
3252: }
3253: ®ister_handler("queryreply", \&reply_query_handler, 0, 1, 0);
3254:
3255: #
3256: # Process the courseidput request. Not quite sure what this means
3257: # at the system level sense. It appears a gdbm file in the
3258: # /home/httpd/lonUsers/$domain/nohist_courseids is tied and
3259: # a set of entries made in that database.
3260: #
3261: # Parameters:
3262: # $cmd - The command keyword that initiated this request.
3263: # $tail - Tail of the command. In this case consists of a colon
3264: # separated list contaning the domain to apply this to and
3265: # an ampersand separated list of keyword=value pairs.
1.272 raeburn 3266: # Each value is a colon separated list that includes:
3267: # description, institutional code and course owner.
3268: # For backward compatibility with versions included
3269: # in LON-CAPA 1.1.X (and earlier) and 1.2.X, institutional
3270: # code and/or course owner are preserved from the existing
3271: # record when writing a new record in response to 1.1 or
3272: # 1.2 implementations of lonnet::flushcourselogs().
3273: #
1.234 foxr 3274: # $client - Socket open on the client.
3275: # Returns:
3276: # 1 - indicating that processing should continue
3277: #
3278: # Side effects:
3279: # reply is written to the client.
3280: #
3281: sub put_course_id_handler {
3282: my ($cmd, $tail, $client) = @_;
3283:
3284:
3285: my $userinput = "$cmd:$tail";
3286:
1.266 raeburn 3287: my ($udom, $what) = split(/:/, $tail,2);
1.234 foxr 3288: chomp($what);
3289: my $now=time;
3290: my @pairs=split(/\&/,$what);
3291:
3292: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3293: if ($hashref) {
3294: foreach my $pair (@pairs) {
1.271 raeburn 3295: my ($key,$courseinfo) = split(/=/,$pair,2);
3296: $courseinfo =~ s/=/:/g;
1.272 raeburn 3297:
1.273 albertel 3298: my @current_items = split(/:/,$hashref->{$key});
3299: shift(@current_items); # remove description
3300: pop(@current_items); # remove last access
1.272 raeburn 3301: my $numcurrent = scalar(@current_items);
3302:
1.273 albertel 3303: my @new_items = split(/:/,$courseinfo);
1.272 raeburn 3304: my $numnew = scalar(@new_items);
3305: if ($numcurrent > 0) {
3306: if ($numnew == 1) { # flushcourselogs() from 1.1 or earlier
3307: $courseinfo .= ':'.join(':',@current_items);
3308: } elsif ($numnew == 2) { # flushcourselogs() from 1.2.X
3309: $courseinfo .= ':'.$current_items[$numcurrent-1];
3310: }
3311: }
1.266 raeburn 3312: $hashref->{$key}=$courseinfo.':'.$now;
1.234 foxr 3313: }
3314: if (untie(%$hashref)) {
1.253 foxr 3315: &Reply( $client, "ok\n", $userinput);
1.234 foxr 3316: } else {
1.253 foxr 3317: &Failure($client, "error: ".($!+0)
1.234 foxr 3318: ." untie(GDBM) Failed ".
3319: "while attempting courseidput\n", $userinput);
3320: }
3321: } else {
1.253 foxr 3322: &Failure($client, "error: ".($!+0)
1.234 foxr 3323: ." tie(GDBM) Failed ".
3324: "while attempting courseidput\n", $userinput);
3325: }
1.253 foxr 3326:
1.234 foxr 3327:
3328: return 1;
3329: }
3330: ®ister_handler("courseidput", \&put_course_id_handler, 0, 1, 0);
3331:
3332: # Retrieves the value of a course id resource keyword pattern
3333: # defined since a starting date. Both the starting date and the
3334: # keyword pattern are optional. If the starting date is not supplied it
3335: # is treated as the beginning of time. If the pattern is not found,
3336: # it is treatred as "." matching everything.
3337: #
3338: # Parameters:
3339: # $cmd - Command keyword that resulted in us being dispatched.
3340: # $tail - The remainder of the command that, in this case, consists
3341: # of a colon separated list of:
3342: # domain - The domain in which the course database is
3343: # defined.
3344: # since - Optional parameter describing the minimum
3345: # time of definition(?) of the resources that
3346: # will match the dump.
3347: # description - regular expression that is used to filter
3348: # the dump. Only keywords matching this regexp
3349: # will be used.
1.272 raeburn 3350: # institutional code - optional supplied code to filter
3351: # the dump. Only courses with an institutional code
3352: # that match the supplied code will be returned.
3353: # owner - optional supplied username of owner to filter
3354: # the dump. Only courses for which the course
3355: # owner matches the supplied username will be
1.274 albertel 3356: # returned. Implicit assumption that owner
3357: # is a user in the domain in which the
3358: # course database is defined.
1.234 foxr 3359: # $client - The socket open on the client.
3360: # Returns:
3361: # 1 - Continue processing.
3362: # Side Effects:
3363: # a reply is written to $client.
3364: sub dump_course_id_handler {
3365: my ($cmd, $tail, $client) = @_;
3366:
3367: my $userinput = "$cmd:$tail";
3368:
1.282 raeburn 3369: my ($udom,$since,$description,$instcodefilter,$ownerfilter,$coursefilter) =split(/:/,$tail);
1.234 foxr 3370: if (defined($description)) {
3371: $description=&unescape($description);
3372: } else {
3373: $description='.';
3374: }
1.266 raeburn 3375: if (defined($instcodefilter)) {
3376: $instcodefilter=&unescape($instcodefilter);
3377: } else {
3378: $instcodefilter='.';
3379: }
3380: if (defined($ownerfilter)) {
3381: $ownerfilter=&unescape($ownerfilter);
3382: } else {
3383: $ownerfilter='.';
3384: }
1.282 raeburn 3385: if (defined($coursefilter)) {
3386: $coursefilter=&unescape($coursefilter);
3387: } else {
3388: $coursefilter='.';
3389: }
1.266 raeburn 3390:
1.234 foxr 3391: unless (defined($since)) { $since=0; }
3392: my $qresult='';
3393: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3394: if ($hashref) {
3395: while (my ($key,$value) = each(%$hashref)) {
1.266 raeburn 3396: my ($descr,$lasttime,$inst_code,$owner);
1.274 albertel 3397: my @courseitems = split(/:/,$value);
3398: $lasttime = pop(@courseitems);
3399: ($descr,$inst_code,$owner)=@courseitems;
1.234 foxr 3400: if ($lasttime<$since) { next; }
1.266 raeburn 3401: my $match = 1;
3402: unless ($description eq '.') {
3403: my $unescapeDescr = &unescape($descr);
3404: unless (eval('$unescapeDescr=~/\Q$description\E/i')) {
3405: $match = 0;
1.234 foxr 3406: }
1.266 raeburn 3407: }
3408: unless ($instcodefilter eq '.' || !defined($instcodefilter)) {
3409: my $unescapeInstcode = &unescape($inst_code);
3410: unless (eval('$unescapeInstcode=~/\Q$instcodefilter\E/i')) {
3411: $match = 0;
3412: }
1.234 foxr 3413: }
1.266 raeburn 3414: unless ($ownerfilter eq '.' || !defined($ownerfilter)) {
3415: my $unescapeOwner = &unescape($owner);
3416: unless (eval('$unescapeOwner=~/\Q$ownerfilter\E/i')) {
3417: $match = 0;
3418: }
3419: }
1.282 raeburn 3420: unless ($coursefilter eq '.' || !defined($coursefilter)) {
3421: my $unescapeCourse = &unescape($key);
3422: unless (eval('$unescapeCourse=~/^$udom(_)\Q$coursefilter\E$/')) {
3423: $match = 0;
3424: }
3425: }
1.266 raeburn 3426: if ($match == 1) {
3427: $qresult.=$key.'='.$descr.':'.$inst_code.':'.$owner.'&';
3428: }
1.234 foxr 3429: }
3430: if (untie(%$hashref)) {
3431: chop($qresult);
3432: &Reply($client, "$qresult\n", $userinput);
3433: } else {
3434: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3435: "while attempting courseiddump\n", $userinput);
3436: }
3437: } else {
3438: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3439: "while attempting courseiddump\n", $userinput);
3440: }
3441:
3442:
3443: return 1;
3444: }
3445: ®ister_handler("courseiddump", \&dump_course_id_handler, 0, 1, 0);
1.238 foxr 3446:
3447: #
3448: # Puts an id to a domains id database.
3449: #
3450: # Parameters:
3451: # $cmd - The command that triggered us.
3452: # $tail - Remainder of the request other than the command. This is a
3453: # colon separated list containing:
3454: # $domain - The domain for which we are writing the id.
3455: # $pairs - The id info to write... this is and & separated list
3456: # of keyword=value.
3457: # $client - Socket open on the client.
3458: # Returns:
3459: # 1 - Continue processing.
3460: # Side effects:
3461: # reply is written to $client.
3462: #
3463: sub put_id_handler {
3464: my ($cmd,$tail,$client) = @_;
3465:
3466:
3467: my $userinput = "$cmd:$tail";
3468:
3469: my ($udom,$what)=split(/:/,$tail);
3470: chomp($what);
3471: my @pairs=split(/\&/,$what);
3472: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
3473: "P", $what);
3474: if ($hashref) {
3475: foreach my $pair (@pairs) {
3476: my ($key,$value)=split(/=/,$pair);
3477: $hashref->{$key}=$value;
3478: }
3479: if (untie(%$hashref)) {
3480: &Reply($client, "ok\n", $userinput);
3481: } else {
3482: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3483: "while attempting idput\n", $userinput);
3484: }
3485: } else {
3486: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3487: "while attempting idput\n", $userinput);
3488: }
3489:
3490: return 1;
3491: }
1.263 albertel 3492: ®ister_handler("idput", \&put_id_handler, 0, 1, 0);
1.238 foxr 3493:
3494: #
3495: # Retrieves a set of id values from the id database.
3496: # Returns an & separated list of results, one for each requested id to the
3497: # client.
3498: #
3499: # Parameters:
3500: # $cmd - Command keyword that caused us to be dispatched.
3501: # $tail - Tail of the command. Consists of a colon separated:
3502: # domain - the domain whose id table we dump
3503: # ids Consists of an & separated list of
3504: # id keywords whose values will be fetched.
3505: # nonexisting keywords will have an empty value.
3506: # $client - Socket open on the client.
3507: #
3508: # Returns:
3509: # 1 - indicating processing should continue.
3510: # Side effects:
3511: # An & separated list of results is written to $client.
3512: #
3513: sub get_id_handler {
3514: my ($cmd, $tail, $client) = @_;
3515:
3516:
3517: my $userinput = "$client:$tail";
3518:
3519: my ($udom,$what)=split(/:/,$tail);
3520: chomp($what);
3521: my @queries=split(/\&/,$what);
3522: my $qresult='';
3523: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_READER());
3524: if ($hashref) {
3525: for (my $i=0;$i<=$#queries;$i++) {
3526: $qresult.="$hashref->{$queries[$i]}&";
3527: }
3528: if (untie(%$hashref)) {
3529: $qresult=~s/\&$//;
3530: &Reply($client, "$qresult\n", $userinput);
3531: } else {
3532: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3533: "while attempting idget\n",$userinput);
3534: }
3535: } else {
3536: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3537: "while attempting idget\n",$userinput);
3538: }
3539:
3540: return 1;
3541: }
1.263 albertel 3542: ®ister_handler("idget", \&get_id_handler, 0, 1, 0);
1.238 foxr 3543:
3544: #
1.299 raeburn 3545: # Puts broadcast e-mail sent by Domain Coordinator in nohist_dcmail database
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 dcmail we are recording
3551: # email Consists of key=value pair
3552: # where key is unique msgid
3553: # and value is message (in XML)
3554: # $client - Socket open on the client.
3555: #
3556: # Returns:
3557: # 1 - indicating processing should continue.
3558: # Side effects
3559: # reply is written to $client.
3560: #
3561: sub put_dcmail_handler {
3562: my ($cmd,$tail,$client) = @_;
3563: my $userinput = "$cmd:$tail";
3564:
3565: my ($udom,$what)=split(/:/,$tail);
3566: chomp($what);
3567: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
3568: if ($hashref) {
3569: my ($key,$value)=split(/=/,$what);
3570: $hashref->{$key}=$value;
3571: }
3572: if (untie(%$hashref)) {
3573: &Reply($client, "ok\n", $userinput);
3574: } else {
3575: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3576: "while attempting dcmailput\n", $userinput);
3577: }
3578: return 1;
3579: }
3580: ®ister_handler("dcmailput", \&put_dcmail_handler, 0, 1, 0);
3581:
3582: #
3583: # Retrieves broadcast e-mail from nohist_dcmail database
3584: # Returns to client an & separated list of key=value pairs,
3585: # where key is msgid and value is message information.
3586: #
3587: # Parameters
3588: # $cmd - Command keyword that caused us to be dispatched.
3589: # $tail - Tail of the command. Consists of a colon separated:
3590: # domain - the domain whose dcmail table we dump
3591: # startfilter - beginning of time window
3592: # endfilter - end of time window
3593: # sendersfilter - & separated list of username:domain
3594: # for senders to search for.
3595: # $client - Socket open on the client.
3596: #
3597: # Returns:
3598: # 1 - indicating processing should continue.
3599: # Side effects
3600: # reply (& separated list of msgid=messageinfo pairs) is
3601: # written to $client.
3602: #
3603: sub dump_dcmail_handler {
3604: my ($cmd, $tail, $client) = @_;
3605:
3606: my $userinput = "$cmd:$tail";
3607: my ($udom,$startfilter,$endfilter,$sendersfilter) = split(/:/,$tail);
3608: chomp($sendersfilter);
3609: my @senders = ();
3610: if (defined($startfilter)) {
3611: $startfilter=&unescape($startfilter);
3612: } else {
3613: $startfilter='.';
3614: }
3615: if (defined($endfilter)) {
3616: $endfilter=&unescape($endfilter);
3617: } else {
3618: $endfilter='.';
3619: }
3620: if (defined($sendersfilter)) {
3621: $sendersfilter=&unescape($sendersfilter);
1.300 albertel 3622: @senders = map { &unescape($_) } split(/\&/,$sendersfilter);
1.299 raeburn 3623: }
3624:
3625: my $qresult='';
3626: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
3627: if ($hashref) {
3628: while (my ($key,$value) = each(%$hashref)) {
3629: my $match = 1;
1.303 albertel 3630: my ($timestamp,$subj,$uname,$udom) =
3631: split(/:/,&unescape(&unescape($key)),5); # yes, twice really
1.299 raeburn 3632: $subj = &unescape($subj);
3633: unless ($startfilter eq '.' || !defined($startfilter)) {
3634: if ($timestamp < $startfilter) {
3635: $match = 0;
3636: }
3637: }
3638: unless ($endfilter eq '.' || !defined($endfilter)) {
3639: if ($timestamp > $endfilter) {
3640: $match = 0;
3641: }
3642: }
3643: unless (@senders < 1) {
3644: unless (grep/^$uname:$udom$/,@senders) {
3645: $match = 0;
3646: }
3647: }
3648: if ($match == 1) {
3649: $qresult.=$key.'='.$value.'&';
3650: }
3651: }
3652: if (untie(%$hashref)) {
3653: chop($qresult);
3654: &Reply($client, "$qresult\n", $userinput);
3655: } else {
3656: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3657: "while attempting dcmaildump\n", $userinput);
3658: }
3659: } else {
3660: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3661: "while attempting dcmaildump\n", $userinput);
3662: }
3663: return 1;
3664: }
3665:
3666: ®ister_handler("dcmaildump", \&dump_dcmail_handler, 0, 1, 0);
3667:
3668: #
3669: # Puts domain roles in nohist_domainroles database
3670: #
3671: # Parameters
3672: # $cmd - Command keyword that caused us to be dispatched.
3673: # $tail - Tail of the command. Consists of a colon separated:
3674: # domain - the domain whose roles we are recording
3675: # role - Consists of key=value pair
3676: # where key is unique role
3677: # and value is start/end date information
3678: # $client - Socket open on the client.
3679: #
3680: # Returns:
3681: # 1 - indicating processing should continue.
3682: # Side effects
3683: # reply is written to $client.
3684: #
3685:
3686: sub put_domainroles_handler {
3687: my ($cmd,$tail,$client) = @_;
3688:
3689: my $userinput = "$cmd:$tail";
3690: my ($udom,$what)=split(/:/,$tail);
3691: chomp($what);
3692: my @pairs=split(/\&/,$what);
3693: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
3694: if ($hashref) {
3695: foreach my $pair (@pairs) {
3696: my ($key,$value)=split(/=/,$pair);
3697: $hashref->{$key}=$value;
3698: }
3699: if (untie(%$hashref)) {
3700: &Reply($client, "ok\n", $userinput);
3701: } else {
3702: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3703: "while attempting domroleput\n", $userinput);
3704: }
3705: } else {
3706: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3707: "while attempting domroleput\n", $userinput);
3708: }
3709:
3710: return 1;
3711: }
3712:
3713: ®ister_handler("domroleput", \&put_domainroles_handler, 0, 1, 0);
3714:
3715: #
3716: # Retrieves domain roles from nohist_domainroles database
3717: # Returns to client an & separated list of key=value pairs,
3718: # where key is role and value is start and end date information.
3719: #
3720: # Parameters
3721: # $cmd - Command keyword that caused us to be dispatched.
3722: # $tail - Tail of the command. Consists of a colon separated:
3723: # domain - the domain whose domain roles table we dump
3724: # $client - Socket open on the client.
3725: #
3726: # Returns:
3727: # 1 - indicating processing should continue.
3728: # Side effects
3729: # reply (& separated list of role=start/end info pairs) is
3730: # written to $client.
3731: #
3732: sub dump_domainroles_handler {
3733: my ($cmd, $tail, $client) = @_;
3734:
3735: my $userinput = "$cmd:$tail";
3736: my ($udom,$startfilter,$endfilter,$rolesfilter) = split(/:/,$tail);
3737: chomp($rolesfilter);
3738: my @roles = ();
3739: if (defined($startfilter)) {
3740: $startfilter=&unescape($startfilter);
3741: } else {
3742: $startfilter='.';
3743: }
3744: if (defined($endfilter)) {
3745: $endfilter=&unescape($endfilter);
3746: } else {
3747: $endfilter='.';
3748: }
3749: if (defined($rolesfilter)) {
3750: $rolesfilter=&unescape($rolesfilter);
1.300 albertel 3751: @roles = split(/\&/,$rolesfilter);
1.299 raeburn 3752: }
3753:
3754: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
3755: if ($hashref) {
3756: my $qresult = '';
3757: while (my ($key,$value) = each(%$hashref)) {
3758: my $match = 1;
3759: my ($start,$end) = split(/:/,&unescape($value));
3760: my ($trole,$uname,$udom,$runame,$rudom,$rsec) = split(/:/,&unescape($key));
3761: unless ($startfilter eq '.' || !defined($startfilter)) {
3762: if ($start >= $startfilter) {
3763: $match = 0;
3764: }
3765: }
3766: unless ($endfilter eq '.' || !defined($endfilter)) {
3767: if ($end <= $endfilter) {
3768: $match = 0;
3769: }
3770: }
3771: unless (@roles < 1) {
3772: unless (grep/^$trole$/,@roles) {
3773: $match = 0;
3774: }
3775: }
3776: if ($match == 1) {
3777: $qresult.=$key.'='.$value.'&';
3778: }
3779: }
3780: if (untie(%$hashref)) {
3781: chop($qresult);
3782: &Reply($client, "$qresult\n", $userinput);
3783: } else {
3784: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3785: "while attempting domrolesdump\n", $userinput);
3786: }
3787: } else {
3788: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3789: "while attempting domrolesdump\n", $userinput);
3790: }
3791: return 1;
3792: }
3793:
3794: ®ister_handler("domrolesdump", \&dump_domainroles_handler, 0, 1, 0);
3795:
3796:
1.238 foxr 3797: # Process the tmpput command I'm not sure what this does.. Seems to
3798: # create a file in the lonDaemons/tmp directory of the form $id.tmp
3799: # where Id is the client's ip concatenated with a sequence number.
3800: # The file will contain some value that is passed in. Is this e.g.
3801: # a login token?
3802: #
3803: # Parameters:
3804: # $cmd - The command that got us dispatched.
3805: # $tail - The remainder of the request following $cmd:
3806: # In this case this will be the contents of the file.
3807: # $client - Socket connected to the client.
3808: # Returns:
3809: # 1 indicating processing can continue.
3810: # Side effects:
3811: # A file is created in the local filesystem.
3812: # A reply is sent to the client.
3813: sub tmp_put_handler {
3814: my ($cmd, $what, $client) = @_;
3815:
3816: my $userinput = "$cmd:$what"; # Reconstruct for logging.
3817:
3818:
3819: my $store;
3820: $tmpsnum++;
3821: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
3822: $id=~s/\W/\_/g;
3823: $what=~s/\n//g;
3824: my $execdir=$perlvar{'lonDaemons'};
3825: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
3826: print $store $what;
3827: close $store;
3828: &Reply($client, "$id\n", $userinput);
3829: } else {
3830: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
3831: "while attempting tmpput\n", $userinput);
3832: }
3833: return 1;
3834:
3835: }
3836: ®ister_handler("tmpput", \&tmp_put_handler, 0, 1, 0);
1.263 albertel 3837:
1.238 foxr 3838: # Processes the tmpget command. This command returns the contents
3839: # of a temporary resource file(?) created via tmpput.
3840: #
3841: # Paramters:
3842: # $cmd - Command that got us dispatched.
3843: # $id - Tail of the command, contain the id of the resource
3844: # we want to fetch.
3845: # $client - socket open on the client.
3846: # Return:
3847: # 1 - Inidcating processing can continue.
3848: # Side effects:
3849: # A reply is sent to the client.
3850: #
3851: sub tmp_get_handler {
3852: my ($cmd, $id, $client) = @_;
3853:
3854: my $userinput = "$cmd:$id";
3855:
3856:
3857: $id=~s/\W/\_/g;
3858: my $store;
3859: my $execdir=$perlvar{'lonDaemons'};
3860: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
3861: my $reply=<$store>;
3862: &Reply( $client, "$reply\n", $userinput);
3863: close $store;
3864: } else {
3865: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
3866: "while attempting tmpget\n", $userinput);
3867: }
3868:
3869: return 1;
3870: }
3871: ®ister_handler("tmpget", \&tmp_get_handler, 0, 1, 0);
1.263 albertel 3872:
1.238 foxr 3873: #
3874: # Process the tmpdel command. This command deletes a temp resource
3875: # created by the tmpput command.
3876: #
3877: # Parameters:
3878: # $cmd - Command that got us here.
3879: # $id - Id of the temporary resource created.
3880: # $client - socket open on the client process.
3881: #
3882: # Returns:
3883: # 1 - Indicating processing should continue.
3884: # Side Effects:
3885: # A file is deleted
3886: # A reply is sent to the client.
3887: sub tmp_del_handler {
3888: my ($cmd, $id, $client) = @_;
3889:
3890: my $userinput= "$cmd:$id";
3891:
3892: chomp($id);
3893: $id=~s/\W/\_/g;
3894: my $execdir=$perlvar{'lonDaemons'};
3895: if (unlink("$execdir/tmp/$id.tmp")) {
3896: &Reply($client, "ok\n", $userinput);
3897: } else {
3898: &Failure( $client, "error: ".($!+0)."Unlink tmp Failed ".
3899: "while attempting tmpdel\n", $userinput);
3900: }
3901:
3902: return 1;
3903:
3904: }
3905: ®ister_handler("tmpdel", \&tmp_del_handler, 0, 1, 0);
1.263 albertel 3906:
1.238 foxr 3907: #
1.246 foxr 3908: # Processes the setannounce command. This command
3909: # creates a file named announce.txt in the top directory of
3910: # the documentn root and sets its contents. The announce.txt file is
3911: # printed in its entirety at the LonCAPA login page. Note:
3912: # once the announcement.txt fileis created it cannot be deleted.
3913: # However, setting the contents of the file to empty removes the
3914: # announcement from the login page of loncapa so who cares.
3915: #
3916: # Parameters:
3917: # $cmd - The command that got us dispatched.
3918: # $announcement - The text of the announcement.
3919: # $client - Socket open on the client process.
3920: # Retunrns:
3921: # 1 - Indicating request processing should continue
3922: # Side Effects:
3923: # The file {DocRoot}/announcement.txt is created.
3924: # A reply is sent to $client.
3925: #
3926: sub set_announce_handler {
3927: my ($cmd, $announcement, $client) = @_;
3928:
3929: my $userinput = "$cmd:$announcement";
3930:
3931: chomp($announcement);
3932: $announcement=&unescape($announcement);
3933: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
3934: '/announcement.txt')) {
3935: print $store $announcement;
3936: close $store;
3937: &Reply($client, "ok\n", $userinput);
3938: } else {
3939: &Failure($client, "error: ".($!+0)."\n", $userinput);
3940: }
3941:
3942: return 1;
3943: }
3944: ®ister_handler("setannounce", \&set_announce_handler, 0, 1, 0);
1.263 albertel 3945:
1.246 foxr 3946: #
3947: # Return the version of the daemon. This can be used to determine
3948: # the compatibility of cross version installations or, alternatively to
3949: # simply know who's out of date and who isn't. Note that the version
3950: # is returned concatenated with the tail.
3951: # Parameters:
3952: # $cmd - the request that dispatched to us.
3953: # $tail - Tail of the request (client's version?).
3954: # $client - Socket open on the client.
3955: #Returns:
3956: # 1 - continue processing requests.
3957: # Side Effects:
3958: # Replies with version to $client.
3959: sub get_version_handler {
3960: my ($cmd, $tail, $client) = @_;
3961:
3962: my $userinput = $cmd.$tail;
3963:
3964: &Reply($client, &version($userinput)."\n", $userinput);
3965:
3966:
3967: return 1;
3968: }
3969: ®ister_handler("version", \&get_version_handler, 0, 1, 0);
1.263 albertel 3970:
1.246 foxr 3971: # Set the current host and domain. This is used to support
3972: # multihomed systems. Each IP of the system, or even separate daemons
3973: # on the same IP can be treated as handling a separate lonCAPA virtual
3974: # machine. This command selects the virtual lonCAPA. The client always
3975: # knows the right one since it is lonc and it is selecting the domain/system
3976: # from the hosts.tab file.
3977: # Parameters:
3978: # $cmd - Command that dispatched us.
3979: # $tail - Tail of the command (domain/host requested).
3980: # $socket - Socket open on the client.
3981: #
3982: # Returns:
3983: # 1 - Indicates the program should continue to process requests.
3984: # Side-effects:
3985: # The default domain/system context is modified for this daemon.
3986: # a reply is sent to the client.
3987: #
3988: sub set_virtual_host_handler {
3989: my ($cmd, $tail, $socket) = @_;
3990:
3991: my $userinput ="$cmd:$tail";
3992:
3993: &Reply($client, &sethost($userinput)."\n", $userinput);
3994:
3995:
3996: return 1;
3997: }
1.247 albertel 3998: ®ister_handler("sethost", \&set_virtual_host_handler, 0, 1, 0);
1.246 foxr 3999:
4000: # Process a request to exit:
4001: # - "bye" is sent to the client.
4002: # - The client socket is shutdown and closed.
4003: # - We indicate to the caller that we should exit.
4004: # Formal Parameters:
4005: # $cmd - The command that got us here.
4006: # $tail - Tail of the command (empty).
4007: # $client - Socket open on the tail.
4008: # Returns:
4009: # 0 - Indicating the program should exit!!
4010: #
4011: sub exit_handler {
4012: my ($cmd, $tail, $client) = @_;
4013:
4014: my $userinput = "$cmd:$tail";
4015:
4016: &logthis("Client $clientip ($clientname) hanging up: $userinput");
4017: &Reply($client, "bye\n", $userinput);
4018: $client->shutdown(2); # shutdown the socket forcibly.
4019: $client->close();
4020:
4021: return 0;
4022: }
1.248 foxr 4023: ®ister_handler("exit", \&exit_handler, 0,1,1);
4024: ®ister_handler("init", \&exit_handler, 0,1,1);
4025: ®ister_handler("quit", \&exit_handler, 0,1,1);
4026:
4027: # Determine if auto-enrollment is enabled.
4028: # Note that the original had what I believe to be a defect.
4029: # The original returned 0 if the requestor was not a registerd client.
4030: # It should return "refused".
4031: # Formal Parameters:
4032: # $cmd - The command that invoked us.
4033: # $tail - The tail of the command (Extra command parameters.
4034: # $client - The socket open on the client that issued the request.
4035: # Returns:
4036: # 1 - Indicating processing should continue.
4037: #
4038: sub enrollment_enabled_handler {
4039: my ($cmd, $tail, $client) = @_;
4040: my $userinput = $cmd.":".$tail; # For logging purposes.
4041:
4042:
4043: my $cdom = split(/:/, $tail); # Domain we're asking about.
4044: my $outcome = &localenroll::run($cdom);
4045: &Reply($client, "$outcome\n", $userinput);
4046:
4047: return 1;
4048: }
4049: ®ister_handler("autorun", \&enrollment_enabled_handler, 0, 1, 0);
4050:
4051: # Get the official sections for which auto-enrollment is possible.
4052: # Since the admin people won't know about 'unofficial sections'
4053: # we cannot auto-enroll on them.
4054: # Formal Parameters:
4055: # $cmd - The command request that got us dispatched here.
4056: # $tail - The remainder of the request. In our case this
4057: # will be split into:
4058: # $coursecode - The course name from the admin point of view.
4059: # $cdom - The course's domain(?).
4060: # $client - Socket open on the client.
4061: # Returns:
4062: # 1 - Indiciting processing should continue.
4063: #
4064: sub get_sections_handler {
4065: my ($cmd, $tail, $client) = @_;
4066: my $userinput = "$cmd:$tail";
4067:
4068: my ($coursecode, $cdom) = split(/:/, $tail);
4069: my @secs = &localenroll::get_sections($coursecode,$cdom);
4070: my $seclist = &escape(join(':',@secs));
4071:
4072: &Reply($client, "$seclist\n", $userinput);
4073:
4074:
4075: return 1;
4076: }
4077: ®ister_handler("autogetsections", \&get_sections_handler, 0, 1, 0);
4078:
4079: # Validate the owner of a new course section.
4080: #
4081: # Formal Parameters:
4082: # $cmd - Command that got us dispatched.
4083: # $tail - the remainder of the command. For us this consists of a
4084: # colon separated string containing:
4085: # $inst - Course Id from the institutions point of view.
4086: # $owner - Proposed owner of the course.
4087: # $cdom - Domain of the course (from the institutions
4088: # point of view?)..
4089: # $client - Socket open on the client.
4090: #
4091: # Returns:
4092: # 1 - Processing should continue.
4093: #
4094: sub validate_course_owner_handler {
4095: my ($cmd, $tail, $client) = @_;
4096: my $userinput = "$cmd:$tail";
4097: my ($inst_course_id, $owner, $cdom) = split(/:/, $tail);
4098:
4099: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom);
4100: &Reply($client, "$outcome\n", $userinput);
4101:
4102:
4103:
4104: return 1;
4105: }
4106: ®ister_handler("autonewcourse", \&validate_course_owner_handler, 0, 1, 0);
1.263 albertel 4107:
1.248 foxr 4108: #
4109: # Validate a course section in the official schedule of classes
4110: # from the institutions point of view (part of autoenrollment).
4111: #
4112: # Formal Parameters:
4113: # $cmd - The command request that got us dispatched.
4114: # $tail - The tail of the command. In this case,
4115: # this is a colon separated set of words that will be split
4116: # into:
4117: # $inst_course_id - The course/section id from the
4118: # institutions point of view.
4119: # $cdom - The domain from the institutions
4120: # point of view.
4121: # $client - Socket open on the client.
4122: # Returns:
4123: # 1 - Indicating processing should continue.
4124: #
4125: sub validate_course_section_handler {
4126: my ($cmd, $tail, $client) = @_;
4127: my $userinput = "$cmd:$tail";
4128: my ($inst_course_id, $cdom) = split(/:/, $tail);
4129:
4130: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
4131: &Reply($client, "$outcome\n", $userinput);
4132:
4133:
4134: return 1;
4135: }
4136: ®ister_handler("autovalidatecourse", \&validate_course_section_handler, 0, 1, 0);
4137:
4138: #
4139: # Create a password for a new auto-enrollment user.
4140: # I think/guess, this password allows access to the institutions
4141: # AIS class list server/services. Stuart can correct this comment
4142: # when he finds out how wrong I am.
4143: #
4144: # Formal Parameters:
4145: # $cmd - The command request that got us dispatched.
4146: # $tail - The tail of the command. In this case this is a colon separated
4147: # set of words that will be split into:
4148: # $authparam - An authentication parameter (username??).
4149: # $cdom - The domain of the course from the institution's
4150: # point of view.
4151: # $client - The socket open on the client.
4152: # Returns:
4153: # 1 - continue processing.
4154: #
4155: sub create_auto_enroll_password_handler {
4156: my ($cmd, $tail, $client) = @_;
4157: my $userinput = "$cmd:$tail";
4158:
4159: my ($authparam, $cdom) = split(/:/, $userinput);
4160:
4161: my ($create_passwd,$authchk);
4162: ($authparam,
4163: $create_passwd,
4164: $authchk) = &localenroll::create_password($authparam,$cdom);
4165:
4166: &Reply($client, &escape($authparam.':'.$create_passwd.':'.$authchk)."\n",
4167: $userinput);
4168:
4169:
4170: return 1;
4171: }
4172: ®ister_handler("autocreatepassword", \&create_auto_enroll_password_handler,
4173: 0, 1, 0);
4174:
4175: # Retrieve and remove temporary files created by/during autoenrollment.
4176: #
4177: # Formal Parameters:
4178: # $cmd - The command that got us dispatched.
4179: # $tail - The tail of the command. In our case this is a colon
4180: # separated list that will be split into:
4181: # $filename - The name of the file to remove.
4182: # The filename is given as a path relative to
4183: # the LonCAPA temp file directory.
4184: # $client - Socket open on the client.
4185: #
4186: # Returns:
4187: # 1 - Continue processing.
4188: sub retrieve_auto_file_handler {
4189: my ($cmd, $tail, $client) = @_;
4190: my $userinput = "cmd:$tail";
4191:
4192: my ($filename) = split(/:/, $tail);
4193:
4194: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
4195: if ( (-e $source) && ($filename ne '') ) {
4196: my $reply = '';
4197: if (open(my $fh,$source)) {
4198: while (<$fh>) {
4199: chomp($_);
4200: $_ =~ s/^\s+//g;
4201: $_ =~ s/\s+$//g;
4202: $reply .= $_;
4203: }
4204: close($fh);
4205: &Reply($client, &escape($reply)."\n", $userinput);
4206:
4207: # Does this have to be uncommented??!? (RF).
4208: #
4209: # unlink($source);
4210: } else {
4211: &Failure($client, "error\n", $userinput);
4212: }
4213: } else {
4214: &Failure($client, "error\n", $userinput);
4215: }
4216:
4217:
4218: return 1;
4219: }
4220: ®ister_handler("autoretrieve", \&retrieve_auto_file_handler, 0,1,0);
4221:
4222: #
4223: # Read and retrieve institutional code format (for support form).
4224: # Formal Parameters:
4225: # $cmd - Command that dispatched us.
4226: # $tail - Tail of the command. In this case it conatins
4227: # the course domain and the coursename.
4228: # $client - Socket open on the client.
4229: # Returns:
4230: # 1 - Continue processing.
4231: #
4232: sub get_institutional_code_format_handler {
4233: my ($cmd, $tail, $client) = @_;
4234: my $userinput = "$cmd:$tail";
4235:
4236: my $reply;
4237: my($cdom,$course) = split(/:/,$tail);
4238: my @pairs = split/\&/,$course;
4239: my %instcodes = ();
4240: my %codes = ();
4241: my @codetitles = ();
4242: my %cat_titles = ();
4243: my %cat_order = ();
4244: foreach (@pairs) {
4245: my ($key,$value) = split/=/,$_;
4246: $instcodes{&unescape($key)} = &unescape($value);
4247: }
4248: my $formatreply = &localenroll::instcode_format($cdom,
4249: \%instcodes,
4250: \%codes,
4251: \@codetitles,
4252: \%cat_titles,
4253: \%cat_order);
4254: if ($formatreply eq 'ok') {
4255: my $codes_str = &hash2str(%codes);
4256: my $codetitles_str = &array2str(@codetitles);
4257: my $cat_titles_str = &hash2str(%cat_titles);
4258: my $cat_order_str = &hash2str(%cat_order);
4259: &Reply($client,
4260: $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'
4261: .$cat_order_str."\n",
4262: $userinput);
4263: } else {
4264: # this else branch added by RF since if not ok, lonc will
4265: # hang waiting on reply until timeout.
4266: #
4267: &Reply($client, "format_error\n", $userinput);
4268: }
4269:
4270: return 1;
4271: }
1.265 albertel 4272: ®ister_handler("autoinstcodeformat",
4273: \&get_institutional_code_format_handler,0,1,0);
1.246 foxr 4274:
1.265 albertel 4275: #
4276: # Gets a student's photo to exist (in the correct image type) in the user's
4277: # directory.
4278: # Formal Parameters:
4279: # $cmd - The command request that got us dispatched.
4280: # $tail - A colon separated set of words that will be split into:
4281: # $domain - student's domain
4282: # $uname - student username
4283: # $type - image type desired
4284: # $client - The socket open on the client.
4285: # Returns:
4286: # 1 - continue processing.
4287: sub student_photo_handler {
4288: my ($cmd, $tail, $client) = @_;
4289: my ($domain,$uname,$type) = split(/:/, $tail);
4290:
4291: my $path=&propath($domain,$uname).
4292: '/userfiles/internal/studentphoto.'.$type;
4293: if (-e $path) {
4294: &Reply($client,"ok\n","$cmd:$tail");
4295: return 1;
4296: }
4297: &mkpath($path);
4298: my $file=&localstudentphoto::fetch($domain,$uname);
4299: if (!$file) {
4300: &Failure($client,"unavailable\n","$cmd:$tail");
4301: return 1;
4302: }
4303: if (!-e $path) { &convert_photo($file,$path); }
4304: if (-e $path) {
4305: &Reply($client,"ok\n","$cmd:$tail");
4306: return 1;
4307: }
4308: &Failure($client,"unable_to_convert\n","$cmd:$tail");
4309: return 1;
4310: }
4311: ®ister_handler("studentphoto", \&student_photo_handler, 0, 1, 0);
1.246 foxr 4312:
1.264 albertel 4313: # mkpath makes all directories for a file, expects an absolute path with a
4314: # file or a trailing / if just a dir is passed
4315: # returns 1 on success 0 on failure
4316: sub mkpath {
4317: my ($file)=@_;
4318: my @parts=split(/\//,$file,-1);
4319: my $now=$parts[0].'/'.$parts[1].'/'.$parts[2];
4320: for (my $i=3;$i<= ($#parts-1);$i++) {
1.265 albertel 4321: $now.='/'.$parts[$i];
1.264 albertel 4322: if (!-e $now) {
4323: if (!mkdir($now,0770)) { return 0; }
4324: }
4325: }
4326: return 1;
4327: }
4328:
1.207 foxr 4329: #---------------------------------------------------------------
4330: #
4331: # Getting, decoding and dispatching requests:
4332: #
4333: #
4334: # Get a Request:
4335: # Gets a Request message from the client. The transaction
4336: # is defined as a 'line' of text. We remove the new line
4337: # from the text line.
1.226 foxr 4338: #
1.211 albertel 4339: sub get_request {
1.207 foxr 4340: my $input = <$client>;
4341: chomp($input);
1.226 foxr 4342:
1.234 foxr 4343: &Debug("get_request: Request = $input\n");
1.207 foxr 4344:
4345: &status('Processing '.$clientname.':'.$input);
4346:
4347: return $input;
4348: }
1.212 foxr 4349: #---------------------------------------------------------------
4350: #
4351: # Process a request. This sub should shrink as each action
4352: # gets farmed out into a separat sub that is registered
4353: # with the dispatch hash.
4354: #
4355: # Parameters:
4356: # user_input - The request received from the client (lonc).
4357: # Returns:
4358: # true to keep processing, false if caller should exit.
4359: #
4360: sub process_request {
4361: my ($userinput) = @_; # Easier for now to break style than to
4362: # fix all the userinput -> user_input.
4363: my $wasenc = 0; # True if request was encrypted.
4364: # ------------------------------------------------------------ See if encrypted
4365: if ($userinput =~ /^enc/) {
4366: $userinput = decipher($userinput);
4367: $wasenc=1;
4368: if(!$userinput) { # Cipher not defined.
1.251 foxr 4369: &Failure($client, "error: Encrypted data without negotated key\n");
1.212 foxr 4370: return 0;
4371: }
4372: }
4373: Debug("process_request: $userinput\n");
4374:
1.213 foxr 4375: #
4376: # The 'correct way' to add a command to lond is now to
4377: # write a sub to execute it and Add it to the command dispatch
4378: # hash via a call to register_handler.. The comments to that
4379: # sub should give you enough to go on to show how to do this
4380: # along with the examples that are building up as this code
4381: # is getting refactored. Until all branches of the
4382: # if/elseif monster below have been factored out into
4383: # separate procesor subs, if the dispatch hash is missing
4384: # the command keyword, we will fall through to the remainder
4385: # of the if/else chain below in order to keep this thing in
4386: # working order throughout the transmogrification.
4387:
4388: my ($command, $tail) = split(/:/, $userinput, 2);
4389: chomp($command);
4390: chomp($tail);
4391: $tail =~ s/(\r)//; # This helps people debugging with e.g. telnet.
1.214 foxr 4392: $command =~ s/(\r)//; # And this too for parameterless commands.
4393: if(!$tail) {
4394: $tail =""; # defined but blank.
4395: }
1.213 foxr 4396:
4397: &Debug("Command received: $command, encoded = $wasenc");
4398:
4399: if(defined $Dispatcher{$command}) {
4400:
4401: my $dispatch_info = $Dispatcher{$command};
4402: my $handler = $$dispatch_info[0];
4403: my $need_encode = $$dispatch_info[1];
4404: my $client_types = $$dispatch_info[2];
4405: Debug("Matched dispatch hash: mustencode: $need_encode "
4406: ."ClientType $client_types");
4407:
4408: # Validate the request:
4409:
4410: my $ok = 1;
4411: my $requesterprivs = 0;
4412: if(&isClient()) {
4413: $requesterprivs |= $CLIENT_OK;
4414: }
4415: if(&isManager()) {
4416: $requesterprivs |= $MANAGER_OK;
4417: }
4418: if($need_encode && (!$wasenc)) {
4419: Debug("Must encode but wasn't: $need_encode $wasenc");
4420: $ok = 0;
4421: }
4422: if(($client_types & $requesterprivs) == 0) {
4423: Debug("Client not privileged to do this operation");
4424: $ok = 0;
4425: }
4426:
4427: if($ok) {
4428: Debug("Dispatching to handler $command $tail");
4429: my $keep_going = &$handler($command, $tail, $client);
4430: return $keep_going;
4431: } else {
4432: Debug("Refusing to dispatch because client did not match requirements");
4433: Failure($client, "refused\n", $userinput);
4434: return 1;
4435: }
4436:
4437: }
4438:
1.262 foxr 4439: print $client "unknown_cmd\n";
1.212 foxr 4440: # -------------------------------------------------------------------- complete
4441: Debug("process_request - returning 1");
4442: return 1;
4443: }
1.207 foxr 4444: #
4445: # Decipher encoded traffic
4446: # Parameters:
4447: # input - Encoded data.
4448: # Returns:
4449: # Decoded data or undef if encryption key was not yet negotiated.
4450: # Implicit input:
4451: # cipher - This global holds the negotiated encryption key.
4452: #
1.211 albertel 4453: sub decipher {
1.207 foxr 4454: my ($input) = @_;
4455: my $output = '';
1.212 foxr 4456:
4457:
1.207 foxr 4458: if($cipher) {
4459: my($enc, $enclength, $encinput) = split(/:/, $input);
4460: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
4461: $output .=
4462: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
4463: }
4464: return substr($output, 0, $enclength);
4465: } else {
4466: return undef;
4467: }
4468: }
4469:
4470: #
4471: # Register a command processor. This function is invoked to register a sub
4472: # to process a request. Once registered, the ProcessRequest sub can automatically
4473: # dispatch requests to an appropriate sub, and do the top level validity checking
4474: # as well:
4475: # - Is the keyword recognized.
4476: # - Is the proper client type attempting the request.
4477: # - Is the request encrypted if it has to be.
4478: # Parameters:
4479: # $request_name - Name of the request being registered.
4480: # This is the command request that will match
4481: # against the hash keywords to lookup the information
4482: # associated with the dispatch information.
4483: # $procedure - Reference to a sub to call to process the request.
4484: # All subs get called as follows:
4485: # Procedure($cmd, $tail, $replyfd, $key)
4486: # $cmd - the actual keyword that invoked us.
4487: # $tail - the tail of the request that invoked us.
4488: # $replyfd- File descriptor connected to the client
4489: # $must_encode - True if the request must be encoded to be good.
4490: # $client_ok - True if it's ok for a client to request this.
4491: # $manager_ok - True if it's ok for a manager to request this.
4492: # Side effects:
4493: # - On success, the Dispatcher hash has an entry added for the key $RequestName
4494: # - On failure, the program will die as it's a bad internal bug to try to
4495: # register a duplicate command handler.
4496: #
1.211 albertel 4497: sub register_handler {
1.212 foxr 4498: my ($request_name,$procedure,$must_encode, $client_ok,$manager_ok) = @_;
1.207 foxr 4499:
4500: # Don't allow duplication#
4501:
4502: if (defined $Dispatcher{$request_name}) {
4503: die "Attempting to define a duplicate request handler for $request_name\n";
4504: }
4505: # Build the client type mask:
4506:
4507: my $client_type_mask = 0;
4508: if($client_ok) {
4509: $client_type_mask |= $CLIENT_OK;
4510: }
4511: if($manager_ok) {
4512: $client_type_mask |= $MANAGER_OK;
4513: }
4514:
4515: # Enter the hash:
4516:
4517: my @entry = ($procedure, $must_encode, $client_type_mask);
4518:
4519: $Dispatcher{$request_name} = \@entry;
4520:
4521: }
4522:
4523:
4524: #------------------------------------------------------------------
4525:
4526:
4527:
4528:
1.141 foxr 4529: #
1.96 foxr 4530: # Convert an error return code from lcpasswd to a string value.
4531: #
4532: sub lcpasswdstrerror {
4533: my $ErrorCode = shift;
1.97 foxr 4534: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
1.96 foxr 4535: return "lcpasswd Unrecognized error return value ".$ErrorCode;
4536: } else {
1.98 foxr 4537: return $passwderrors[$ErrorCode];
1.96 foxr 4538: }
4539: }
4540:
1.97 foxr 4541: #
4542: # Convert an error return code from lcuseradd to a string value:
4543: #
4544: sub lcuseraddstrerror {
4545: my $ErrorCode = shift;
4546: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
4547: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
4548: } else {
1.98 foxr 4549: return $adderrors[$ErrorCode];
1.97 foxr 4550: }
4551: }
4552:
1.23 harris41 4553: # grabs exception and records it to log before exiting
4554: sub catchexception {
1.27 albertel 4555: my ($error)=@_;
1.25 www 4556: $SIG{'QUIT'}='DEFAULT';
4557: $SIG{__DIE__}='DEFAULT';
1.165 albertel 4558: &status("Catching exception");
1.190 albertel 4559: &logthis("<font color='red'>CRITICAL: "
1.134 albertel 4560: ."ABNORMAL EXIT. Child $$ for server $thisserver died through "
1.27 albertel 4561: ."a crash with this error msg->[$error]</font>");
1.57 www 4562: &logthis('Famous last words: '.$status.' - '.$lastlog);
1.27 albertel 4563: if ($client) { print $client "error: $error\n"; }
1.59 www 4564: $server->close();
1.27 albertel 4565: die($error);
1.23 harris41 4566: }
1.63 www 4567: sub timeout {
1.165 albertel 4568: &status("Handling Timeout");
1.190 albertel 4569: &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
1.63 www 4570: &catchexception('Timeout');
4571: }
1.22 harris41 4572: # -------------------------------- Set signal handlers to record abnormal exits
4573:
1.226 foxr 4574:
1.22 harris41 4575: $SIG{'QUIT'}=\&catchexception;
4576: $SIG{__DIE__}=\&catchexception;
4577:
1.81 matthew 4578: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
1.95 harris41 4579: &status("Read loncapa.conf and loncapa_apache.conf");
4580: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
1.141 foxr 4581: %perlvar=%{$perlvarref};
1.80 harris41 4582: undef $perlvarref;
1.19 www 4583:
1.35 harris41 4584: # ----------------------------- Make sure this process is running from user=www
4585: my $wwwid=getpwnam('www');
4586: if ($wwwid!=$<) {
1.134 albertel 4587: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
4588: my $subj="LON: $currenthostid User ID mismatch";
1.37 harris41 4589: system("echo 'User ID mismatch. lond must be run as user www.' |\
1.35 harris41 4590: mailto $emailto -s '$subj' > /dev/null");
4591: exit 1;
4592: }
4593:
1.19 www 4594: # --------------------------------------------- Check if other instance running
4595:
4596: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
4597:
4598: if (-e $pidfile) {
4599: my $lfh=IO::File->new("$pidfile");
4600: my $pide=<$lfh>;
4601: chomp($pide);
1.29 harris41 4602: if (kill 0 => $pide) { die "already running"; }
1.19 www 4603: }
1.1 albertel 4604:
4605: # ------------------------------------------------------------- Read hosts file
4606:
4607:
4608:
4609: # establish SERVER socket, bind and listen.
4610: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
4611: Type => SOCK_STREAM,
4612: Proto => 'tcp',
4613: Reuse => 1,
4614: Listen => 10 )
1.29 harris41 4615: or die "making socket: $@\n";
1.1 albertel 4616:
4617: # --------------------------------------------------------- Do global variables
4618:
4619: # global variables
4620:
1.134 albertel 4621: my %children = (); # keys are current child process IDs
1.1 albertel 4622:
4623: sub REAPER { # takes care of dead children
4624: $SIG{CHLD} = \&REAPER;
1.165 albertel 4625: &status("Handling child death");
1.178 foxr 4626: my $pid;
4627: do {
4628: $pid = waitpid(-1,&WNOHANG());
4629: if (defined($children{$pid})) {
4630: &logthis("Child $pid died");
4631: delete($children{$pid});
1.183 albertel 4632: } elsif ($pid > 0) {
1.178 foxr 4633: &logthis("Unknown Child $pid died");
4634: }
4635: } while ( $pid > 0 );
4636: foreach my $child (keys(%children)) {
4637: $pid = waitpid($child,&WNOHANG());
4638: if ($pid > 0) {
4639: &logthis("Child $child - $pid looks like we missed it's death");
4640: delete($children{$pid});
4641: }
1.176 albertel 4642: }
1.165 albertel 4643: &status("Finished Handling child death");
1.1 albertel 4644: }
4645:
4646: sub HUNTSMAN { # signal handler for SIGINT
1.165 albertel 4647: &status("Killing children (INT)");
1.1 albertel 4648: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
4649: kill 'INT' => keys %children;
1.59 www 4650: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.1 albertel 4651: my $execdir=$perlvar{'lonDaemons'};
4652: unlink("$execdir/logs/lond.pid");
1.190 albertel 4653: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
1.165 albertel 4654: &status("Done killing children");
1.1 albertel 4655: exit; # clean up with dignity
4656: }
4657:
4658: sub HUPSMAN { # signal handler for SIGHUP
4659: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
1.165 albertel 4660: &status("Killing children for restart (HUP)");
1.1 albertel 4661: kill 'INT' => keys %children;
1.59 www 4662: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.190 albertel 4663: &logthis("<font color='red'>CRITICAL: Restarting</font>");
1.134 albertel 4664: my $execdir=$perlvar{'lonDaemons'};
1.30 harris41 4665: unlink("$execdir/logs/lond.pid");
1.165 albertel 4666: &status("Restarting self (HUP)");
1.1 albertel 4667: exec("$execdir/lond"); # here we go again
4668: }
4669:
1.144 foxr 4670: #
1.148 foxr 4671: # Kill off hashes that describe the host table prior to re-reading it.
4672: # Hashes affected are:
1.200 matthew 4673: # %hostid, %hostdom %hostip %hostdns.
1.148 foxr 4674: #
4675: sub KillHostHashes {
4676: foreach my $key (keys %hostid) {
4677: delete $hostid{$key};
4678: }
4679: foreach my $key (keys %hostdom) {
4680: delete $hostdom{$key};
4681: }
4682: foreach my $key (keys %hostip) {
4683: delete $hostip{$key};
4684: }
1.200 matthew 4685: foreach my $key (keys %hostdns) {
4686: delete $hostdns{$key};
4687: }
1.148 foxr 4688: }
4689: #
4690: # Read in the host table from file and distribute it into the various hashes:
4691: #
4692: # - %hostid - Indexed by IP, the loncapa hostname.
4693: # - %hostdom - Indexed by loncapa hostname, the domain.
4694: # - %hostip - Indexed by hostid, the Ip address of the host.
4695: sub ReadHostTable {
4696:
4697: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
1.200 matthew 4698: my $myloncapaname = $perlvar{'lonHostID'};
4699: Debug("My loncapa name is : $myloncapaname");
1.296 albertel 4700: my %name_to_ip;
1.148 foxr 4701: while (my $configline=<CONFIG>) {
1.277 albertel 4702: if ($configline !~ /^\s*\#/ && $configline !~ /^\s*$/ ) {
4703: my ($id,$domain,$role,$name)=split(/:/,$configline);
4704: $name=~s/\s//g;
1.296 albertel 4705: my $ip;
4706: if (!exists($name_to_ip{$name})) {
4707: $ip = gethostbyname($name);
4708: if (!$ip || length($ip) ne 4) {
4709: &logthis("Skipping host $id name $name no IP found\n");
4710: next;
4711: }
4712: $ip=inet_ntoa($ip);
4713: $name_to_ip{$name} = $ip;
4714: } else {
4715: $ip = $name_to_ip{$name};
1.277 albertel 4716: }
1.200 matthew 4717: $hostid{$ip}=$id; # LonCAPA name of host by IP.
4718: $hostdom{$id}=$domain; # LonCAPA domain name of host.
1.307 albertel 4719: $hostname{$id}=$name; # LonCAPA name -> DNS name
1.277 albertel 4720: $hostip{$id}=$ip; # IP address of host.
1.200 matthew 4721: $hostdns{$name} = $id; # LonCAPA name of host by DNS.
4722:
4723: if ($id eq $perlvar{'lonHostID'}) {
4724: Debug("Found me in the host table: $name");
4725: $thisserver=$name;
4726: }
1.178 foxr 4727: }
1.148 foxr 4728: }
4729: close(CONFIG);
4730: }
4731: #
4732: # Reload the Apache daemon's state.
1.150 foxr 4733: # This is done by invoking /home/httpd/perl/apachereload
4734: # a setuid perl script that can be root for us to do this job.
1.148 foxr 4735: #
4736: sub ReloadApache {
1.150 foxr 4737: my $execdir = $perlvar{'lonDaemons'};
4738: my $script = $execdir."/apachereload";
4739: system($script);
1.148 foxr 4740: }
4741:
4742: #
1.144 foxr 4743: # Called in response to a USR2 signal.
4744: # - Reread hosts.tab
4745: # - All children connected to hosts that were removed from hosts.tab
4746: # are killed via SIGINT
4747: # - All children connected to previously existing hosts are sent SIGUSR1
4748: # - Our internal hosts hash is updated to reflect the new contents of
4749: # hosts.tab causing connections from hosts added to hosts.tab to
4750: # now be honored.
4751: #
4752: sub UpdateHosts {
1.165 albertel 4753: &status("Reload hosts.tab");
1.147 foxr 4754: logthis('<font color="blue"> Updating connections </font>');
1.148 foxr 4755: #
4756: # The %children hash has the set of IP's we currently have children
4757: # on. These need to be matched against records in the hosts.tab
4758: # Any ip's no longer in the table get killed off they correspond to
4759: # either dropped or changed hosts. Note that the re-read of the table
4760: # will take care of new and changed hosts as connections come into being.
4761:
4762:
4763: KillHostHashes;
4764: ReadHostTable;
4765:
4766: foreach my $child (keys %children) {
4767: my $childip = $children{$child};
4768: if(!$hostid{$childip}) {
1.149 foxr 4769: logthis('<font color="blue"> UpdateHosts killing child '
4770: ." $child for ip $childip </font>");
1.148 foxr 4771: kill('INT', $child);
1.149 foxr 4772: } else {
4773: logthis('<font color="green"> keeping child for ip '
4774: ." $childip (pid=$child) </font>");
1.148 foxr 4775: }
4776: }
4777: ReloadApache;
1.165 albertel 4778: &status("Finished reloading hosts.tab");
1.144 foxr 4779: }
4780:
1.148 foxr 4781:
1.57 www 4782: sub checkchildren {
1.165 albertel 4783: &status("Checking on the children (sending signals)");
1.57 www 4784: &initnewstatus();
4785: &logstatus();
4786: &logthis('Going to check on the children');
1.134 albertel 4787: my $docdir=$perlvar{'lonDocRoot'};
1.61 harris41 4788: foreach (sort keys %children) {
1.221 albertel 4789: #sleep 1;
1.57 www 4790: unless (kill 'USR1' => $_) {
4791: &logthis ('Child '.$_.' is dead');
4792: &logstatus($$.' is dead');
1.221 albertel 4793: delete($children{$_});
1.57 www 4794: }
1.61 harris41 4795: }
1.63 www 4796: sleep 5;
1.212 foxr 4797: $SIG{ALRM} = sub { Debug("timeout");
4798: die "timeout"; };
1.113 albertel 4799: $SIG{__DIE__} = 'DEFAULT';
1.165 albertel 4800: &status("Checking on the children (waiting for reports)");
1.63 www 4801: foreach (sort keys %children) {
4802: unless (-e "$docdir/lon-status/londchld/$_.txt") {
1.113 albertel 4803: eval {
4804: alarm(300);
1.63 www 4805: &logthis('Child '.$_.' did not respond');
1.67 albertel 4806: kill 9 => $_;
1.131 albertel 4807: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
4808: #$subj="LON: $currenthostid killed lond process $_";
4809: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
4810: #$execdir=$perlvar{'lonDaemons'};
4811: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
1.221 albertel 4812: delete($children{$_});
1.113 albertel 4813: alarm(0);
4814: }
1.63 www 4815: }
4816: }
1.113 albertel 4817: $SIG{ALRM} = 'DEFAULT';
1.155 albertel 4818: $SIG{__DIE__} = \&catchexception;
1.165 albertel 4819: &status("Finished checking children");
1.221 albertel 4820: &logthis('Finished Checking children');
1.57 www 4821: }
4822:
1.1 albertel 4823: # --------------------------------------------------------------------- Logging
4824:
4825: sub logthis {
4826: my $message=shift;
4827: my $execdir=$perlvar{'lonDaemons'};
4828: my $fh=IO::File->new(">>$execdir/logs/lond.log");
4829: my $now=time;
4830: my $local=localtime($now);
1.58 www 4831: $lastlog=$local.': '.$message;
1.1 albertel 4832: print $fh "$local ($$): $message\n";
4833: }
4834:
1.77 foxr 4835: # ------------------------- Conditional log if $DEBUG true.
4836: sub Debug {
4837: my $message = shift;
4838: if($DEBUG) {
4839: &logthis($message);
4840: }
4841: }
1.161 foxr 4842:
4843: #
4844: # Sub to do replies to client.. this gives a hook for some
4845: # debug tracing too:
4846: # Parameters:
4847: # fd - File open on client.
4848: # reply - Text to send to client.
4849: # request - Original request from client.
4850: #
4851: sub Reply {
1.192 foxr 4852: my ($fd, $reply, $request) = @_;
1.161 foxr 4853: print $fd $reply;
4854: Debug("Request was $request Reply was $reply");
4855:
1.212 foxr 4856: $Transactions++;
4857: }
4858:
4859:
4860: #
4861: # Sub to report a failure.
4862: # This function:
4863: # - Increments the failure statistic counters.
4864: # - Invokes Reply to send the error message to the client.
4865: # Parameters:
4866: # fd - File descriptor open on the client
4867: # reply - Reply text to emit.
4868: # request - The original request message (used by Reply
4869: # to debug if that's enabled.
4870: # Implicit outputs:
4871: # $Failures- The number of failures is incremented.
4872: # Reply (invoked here) sends a message to the
4873: # client:
4874: #
4875: sub Failure {
4876: my $fd = shift;
4877: my $reply = shift;
4878: my $request = shift;
4879:
4880: $Failures++;
4881: Reply($fd, $reply, $request); # That's simple eh?
1.161 foxr 4882: }
1.57 www 4883: # ------------------------------------------------------------------ Log status
4884:
4885: sub logstatus {
1.178 foxr 4886: &status("Doing logging");
4887: my $docdir=$perlvar{'lonDocRoot'};
4888: {
4889: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
1.200 matthew 4890: print $fh $status."\n".$lastlog."\n".time."\n$keymode";
1.178 foxr 4891: $fh->close();
4892: }
1.221 albertel 4893: &status("Finished $$.txt");
4894: {
4895: open(LOG,">>$docdir/lon-status/londstatus.txt");
4896: flock(LOG,LOCK_EX);
4897: print LOG $$."\t".$clientname."\t".$currenthostid."\t"
4898: .$status."\t".$lastlog."\t $keymode\n";
1.275 albertel 4899: flock(LOG,LOCK_UN);
1.221 albertel 4900: close(LOG);
4901: }
1.178 foxr 4902: &status("Finished logging");
1.57 www 4903: }
4904:
4905: sub initnewstatus {
4906: my $docdir=$perlvar{'lonDocRoot'};
4907: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
4908: my $now=time;
4909: my $local=localtime($now);
4910: print $fh "LOND status $local - parent $$\n\n";
1.64 www 4911: opendir(DIR,"$docdir/lon-status/londchld");
1.134 albertel 4912: while (my $filename=readdir(DIR)) {
1.64 www 4913: unlink("$docdir/lon-status/londchld/$filename");
4914: }
4915: closedir(DIR);
1.57 www 4916: }
4917:
4918: # -------------------------------------------------------------- Status setting
4919:
4920: sub status {
4921: my $what=shift;
4922: my $now=time;
4923: my $local=localtime($now);
1.178 foxr 4924: $status=$local.': '.$what;
4925: $0='lond: '.$what.' '.$local;
1.57 www 4926: }
1.11 www 4927:
4928: # -------------------------------------------------------- Escape Special Chars
4929:
4930: sub escape {
4931: my $str=shift;
4932: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
4933: return $str;
4934: }
4935:
4936: # ----------------------------------------------------- Un-Escape Special Chars
4937:
4938: sub unescape {
4939: my $str=shift;
4940: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
4941: return $str;
4942: }
4943:
1.1 albertel 4944: # ----------------------------------------------------------- Send USR1 to lonc
4945:
4946: sub reconlonc {
4947: my $peerfile=shift;
4948: &logthis("Trying to reconnect for $peerfile");
4949: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
4950: if (my $fh=IO::File->new("$loncfile")) {
4951: my $loncpid=<$fh>;
4952: chomp($loncpid);
4953: if (kill 0 => $loncpid) {
4954: &logthis("lonc at pid $loncpid responding, sending USR1");
4955: kill USR1 => $loncpid;
4956: } else {
1.9 www 4957: &logthis(
1.190 albertel 4958: "<font color='red'>CRITICAL: "
1.9 www 4959: ."lonc at pid $loncpid not responding, giving up</font>");
1.1 albertel 4960: }
4961: } else {
1.190 albertel 4962: &logthis('<font color="red">CRITICAL: lonc not running, giving up</font>');
1.1 albertel 4963: }
4964: }
4965:
4966: # -------------------------------------------------- Non-critical communication
1.11 www 4967:
1.1 albertel 4968: sub subreply {
4969: my ($cmd,$server)=@_;
1.307 albertel 4970: my $peerfile="$perlvar{'lonSockDir'}/".$hostname{$server};
1.1 albertel 4971: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
4972: Type => SOCK_STREAM,
4973: Timeout => 10)
4974: or return "con_lost";
1.307 albertel 4975: print $sclient "sethost:$server:$cmd\n";
1.1 albertel 4976: my $answer=<$sclient>;
4977: chomp($answer);
4978: if (!$answer) { $answer="con_lost"; }
4979: return $answer;
4980: }
4981:
4982: sub reply {
4983: my ($cmd,$server)=@_;
4984: my $answer;
1.115 albertel 4985: if ($server ne $currenthostid) {
1.1 albertel 4986: $answer=subreply($cmd,$server);
4987: if ($answer eq 'con_lost') {
4988: $answer=subreply("ping",$server);
4989: if ($answer ne $server) {
1.115 albertel 4990: &logthis("sub reply: answer != server answer is $answer, server is $server");
1.307 albertel 4991: &reconlonc("$perlvar{'lonSockDir'}/".$hostname{$server});
1.1 albertel 4992: }
4993: $answer=subreply($cmd,$server);
4994: }
4995: } else {
4996: $answer='self_reply';
4997: }
4998: return $answer;
4999: }
5000:
1.13 www 5001: # -------------------------------------------------------------- Talk to lonsql
5002:
1.234 foxr 5003: sub sql_reply {
1.12 harris41 5004: my ($cmd)=@_;
1.234 foxr 5005: my $answer=&sub_sql_reply($cmd);
5006: if ($answer eq 'con_lost') { $answer=&sub_sql_reply($cmd); }
1.12 harris41 5007: return $answer;
5008: }
5009:
1.234 foxr 5010: sub sub_sql_reply {
1.12 harris41 5011: my ($cmd)=@_;
5012: my $unixsock="mysqlsock";
5013: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
5014: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
5015: Type => SOCK_STREAM,
5016: Timeout => 10)
5017: or return "con_lost";
5018: print $sclient "$cmd\n";
5019: my $answer=<$sclient>;
5020: chomp($answer);
5021: if (!$answer) { $answer="con_lost"; }
5022: return $answer;
5023: }
5024:
1.1 albertel 5025: # -------------------------------------------- Return path to profile directory
1.11 www 5026:
1.1 albertel 5027: sub propath {
5028: my ($udom,$uname)=@_;
5029: $udom=~s/\W//g;
5030: $uname=~s/\W//g;
1.16 www 5031: my $subdir=$uname.'__';
1.1 albertel 5032: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
5033: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
5034: return $proname;
5035: }
5036:
5037: # --------------------------------------- Is this the home server of an author?
1.11 www 5038:
1.1 albertel 5039: sub ishome {
5040: my $author=shift;
5041: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
5042: my ($udom,$uname)=split(/\//,$author);
5043: my $proname=propath($udom,$uname);
5044: if (-e $proname) {
5045: return 'owner';
5046: } else {
5047: return 'not_owner';
5048: }
5049: }
5050:
5051: # ======================================================= Continue main program
5052: # ---------------------------------------------------- Fork once and dissociate
5053:
1.134 albertel 5054: my $fpid=fork;
1.1 albertel 5055: exit if $fpid;
1.29 harris41 5056: die "Couldn't fork: $!" unless defined ($fpid);
1.1 albertel 5057:
1.29 harris41 5058: POSIX::setsid() or die "Can't start new session: $!";
1.1 albertel 5059:
5060: # ------------------------------------------------------- Write our PID on disk
5061:
1.134 albertel 5062: my $execdir=$perlvar{'lonDaemons'};
1.1 albertel 5063: open (PIDSAVE,">$execdir/logs/lond.pid");
5064: print PIDSAVE "$$\n";
5065: close(PIDSAVE);
1.190 albertel 5066: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
1.57 www 5067: &status('Starting');
1.1 albertel 5068:
1.106 foxr 5069:
1.1 albertel 5070:
5071: # ----------------------------------------------------- Install signal handlers
5072:
1.57 www 5073:
1.1 albertel 5074: $SIG{CHLD} = \&REAPER;
5075: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
5076: $SIG{HUP} = \&HUPSMAN;
1.57 www 5077: $SIG{USR1} = \&checkchildren;
1.144 foxr 5078: $SIG{USR2} = \&UpdateHosts;
1.106 foxr 5079:
1.148 foxr 5080: # Read the host hashes:
5081:
5082: ReadHostTable;
1.106 foxr 5083:
1.286 albertel 5084: my $dist=`$perlvar{'lonDaemons'}/distprobe`;
5085:
1.106 foxr 5086: # --------------------------------------------------------------
5087: # Accept connections. When a connection comes in, it is validated
5088: # and if good, a child process is created to process transactions
5089: # along the connection.
5090:
1.1 albertel 5091: while (1) {
1.165 albertel 5092: &status('Starting accept');
1.106 foxr 5093: $client = $server->accept() or next;
1.165 albertel 5094: &status('Accepted '.$client.' off to spawn');
1.106 foxr 5095: make_new_child($client);
1.165 albertel 5096: &status('Finished spawning');
1.1 albertel 5097: }
5098:
1.212 foxr 5099: sub make_new_child {
5100: my $pid;
5101: # my $cipher; # Now global
5102: my $sigset;
1.178 foxr 5103:
1.212 foxr 5104: $client = shift;
5105: &status('Starting new child '.$client);
5106: &logthis('<font color="green"> Attempting to start child ('.$client.
5107: ")</font>");
5108: # block signal for fork
5109: $sigset = POSIX::SigSet->new(SIGINT);
5110: sigprocmask(SIG_BLOCK, $sigset)
5111: or die "Can't block SIGINT for fork: $!\n";
1.178 foxr 5112:
1.212 foxr 5113: die "fork: $!" unless defined ($pid = fork);
1.178 foxr 5114:
1.212 foxr 5115: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
5116: # connection liveness.
1.178 foxr 5117:
1.212 foxr 5118: #
5119: # Figure out who we're talking to so we can record the peer in
5120: # the pid hash.
5121: #
5122: my $caller = getpeername($client);
5123: my ($port,$iaddr);
5124: if (defined($caller) && length($caller) > 0) {
5125: ($port,$iaddr)=unpack_sockaddr_in($caller);
5126: } else {
5127: &logthis("Unable to determine who caller was, getpeername returned nothing");
5128: }
5129: if (defined($iaddr)) {
5130: $clientip = inet_ntoa($iaddr);
5131: Debug("Connected with $clientip");
5132: } else {
5133: &logthis("Unable to determine clientip");
5134: $clientip='Unavailable';
5135: }
5136:
5137: if ($pid) {
5138: # Parent records the child's birth and returns.
5139: sigprocmask(SIG_UNBLOCK, $sigset)
5140: or die "Can't unblock SIGINT for fork: $!\n";
5141: $children{$pid} = $clientip;
5142: &status('Started child '.$pid);
5143: return;
5144: } else {
5145: # Child can *not* return from this subroutine.
5146: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
5147: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
5148: #don't get intercepted
5149: $SIG{USR1}= \&logstatus;
5150: $SIG{ALRM}= \&timeout;
5151: $lastlog='Forked ';
5152: $status='Forked';
1.178 foxr 5153:
1.212 foxr 5154: # unblock signals
5155: sigprocmask(SIG_UNBLOCK, $sigset)
5156: or die "Can't unblock SIGINT for fork: $!\n";
1.178 foxr 5157:
1.212 foxr 5158: # my $tmpsnum=0; # Now global
5159: #---------------------------------------------------- kerberos 5 initialization
5160: &Authen::Krb5::init_context();
1.297 raeburn 5161: unless (($dist eq 'fedora4') || ($dist eq 'suse9.3')) {
1.286 albertel 5162: &Authen::Krb5::init_ets();
5163: }
1.209 albertel 5164:
1.212 foxr 5165: &status('Accepted connection');
5166: # =============================================================================
5167: # do something with the connection
5168: # -----------------------------------------------------------------------------
5169: # see if we know client and 'check' for spoof IP by ineffective challenge
1.178 foxr 5170:
1.212 foxr 5171: ReadManagerTable; # May also be a manager!!
5172:
1.278 albertel 5173: my $outsideip=$clientip;
5174: if ($clientip eq '127.0.0.1') {
5175: $outsideip=$hostip{$perlvar{'lonHostID'}};
5176: }
5177:
5178: my $clientrec=($hostid{$outsideip} ne undef);
5179: my $ismanager=($managers{$outsideip} ne undef);
1.212 foxr 5180: $clientname = "[unknonwn]";
5181: if($clientrec) { # Establish client type.
5182: $ConnectionType = "client";
1.278 albertel 5183: $clientname = $hostid{$outsideip};
1.212 foxr 5184: if($ismanager) {
5185: $ConnectionType = "both";
5186: }
5187: } else {
5188: $ConnectionType = "manager";
1.278 albertel 5189: $clientname = $managers{$outsideip};
1.212 foxr 5190: }
5191: my $clientok;
1.178 foxr 5192:
1.212 foxr 5193: if ($clientrec || $ismanager) {
5194: &status("Waiting for init from $clientip $clientname");
5195: &logthis('<font color="yellow">INFO: Connection, '.
5196: $clientip.
5197: " ($clientname) connection type = $ConnectionType </font>" );
5198: &status("Connecting $clientip ($clientname))");
5199: my $remotereq=<$client>;
5200: chomp($remotereq);
5201: Debug("Got init: $remotereq");
5202: my $inikeyword = split(/:/, $remotereq);
5203: if ($remotereq =~ /^init/) {
5204: &sethost("sethost:$perlvar{'lonHostID'}");
5205: #
5206: # If the remote is attempting a local init... give that a try:
5207: #
5208: my ($i, $inittype) = split(/:/, $remotereq);
1.209 albertel 5209:
1.212 foxr 5210: # If the connection type is ssl, but I didn't get my
5211: # certificate files yet, then I'll drop back to
5212: # insecure (if allowed).
5213:
5214: if($inittype eq "ssl") {
5215: my ($ca, $cert) = lonssl::CertificateFile;
5216: my $kfile = lonssl::KeyFile;
5217: if((!$ca) ||
5218: (!$cert) ||
5219: (!$kfile)) {
5220: $inittype = ""; # This forces insecure attempt.
5221: &logthis("<font color=\"blue\"> Certificates not "
5222: ."installed -- trying insecure auth</font>");
1.224 foxr 5223: } else { # SSL certificates are in place so
1.212 foxr 5224: } # Leave the inittype alone.
5225: }
5226:
5227: if($inittype eq "local") {
5228: my $key = LocalConnection($client, $remotereq);
5229: if($key) {
5230: Debug("Got local key $key");
5231: $clientok = 1;
5232: my $cipherkey = pack("H32", $key);
5233: $cipher = new IDEA($cipherkey);
5234: print $client "ok:local\n";
5235: &logthis('<font color="green"'
5236: . "Successful local authentication </font>");
5237: $keymode = "local"
1.178 foxr 5238: } else {
1.212 foxr 5239: Debug("Failed to get local key");
5240: $clientok = 0;
5241: shutdown($client, 3);
5242: close $client;
1.178 foxr 5243: }
1.212 foxr 5244: } elsif ($inittype eq "ssl") {
5245: my $key = SSLConnection($client);
5246: if ($key) {
5247: $clientok = 1;
5248: my $cipherkey = pack("H32", $key);
5249: $cipher = new IDEA($cipherkey);
5250: &logthis('<font color="green">'
5251: ."Successfull ssl authentication with $clientname </font>");
5252: $keymode = "ssl";
5253:
1.178 foxr 5254: } else {
1.212 foxr 5255: $clientok = 0;
5256: close $client;
1.178 foxr 5257: }
1.212 foxr 5258:
5259: } else {
5260: my $ok = InsecureConnection($client);
5261: if($ok) {
5262: $clientok = 1;
5263: &logthis('<font color="green">'
5264: ."Successful insecure authentication with $clientname </font>");
5265: print $client "ok\n";
5266: $keymode = "insecure";
1.178 foxr 5267: } else {
1.212 foxr 5268: &logthis('<font color="yellow">'
5269: ."Attempted insecure connection disallowed </font>");
5270: close $client;
5271: $clientok = 0;
1.178 foxr 5272:
5273: }
5274: }
1.212 foxr 5275: } else {
5276: &logthis(
5277: "<font color='blue'>WARNING: "
5278: ."$clientip failed to initialize: >$remotereq< </font>");
5279: &status('No init '.$clientip);
5280: }
5281:
5282: } else {
5283: &logthis(
5284: "<font color='blue'>WARNING: Unknown client $clientip</font>");
5285: &status('Hung up on '.$clientip);
5286: }
5287:
5288: if ($clientok) {
5289: # ---------------- New known client connecting, could mean machine online again
5290:
5291: foreach my $id (keys(%hostip)) {
5292: if ($hostip{$id} ne $clientip ||
5293: $hostip{$currenthostid} eq $clientip) {
5294: # no need to try to do recon's to myself
5295: next;
5296: }
1.307 albertel 5297: &reconlonc("$perlvar{'lonSockDir'}/".$hostname{$id});
1.212 foxr 5298: }
5299: &logthis("<font color='green'>Established connection: $clientname</font>");
5300: &status('Will listen to '.$clientname);
5301: # ------------------------------------------------------------ Process requests
5302: my $keep_going = 1;
5303: my $user_input;
5304: while(($user_input = get_request) && $keep_going) {
5305: alarm(120);
5306: Debug("Main: Got $user_input\n");
5307: $keep_going = &process_request($user_input);
1.178 foxr 5308: alarm(0);
1.212 foxr 5309: &status('Listening to '.$clientname." ($keymode)");
1.161 foxr 5310: }
1.212 foxr 5311:
1.59 www 5312: # --------------------------------------------- client unknown or fishy, refuse
1.212 foxr 5313: } else {
1.161 foxr 5314: print $client "refused\n";
5315: $client->close();
1.190 albertel 5316: &logthis("<font color='blue'>WARNING: "
1.161 foxr 5317: ."Rejected client $clientip, closing connection</font>");
5318: }
1.212 foxr 5319: }
1.161 foxr 5320:
1.1 albertel 5321: # =============================================================================
1.161 foxr 5322:
1.190 albertel 5323: &logthis("<font color='red'>CRITICAL: "
1.161 foxr 5324: ."Disconnect from $clientip ($clientname)</font>");
5325:
5326:
5327: # this exit is VERY important, otherwise the child will become
5328: # a producer of more and more children, forking yourself into
5329: # process death.
5330: exit;
1.106 foxr 5331:
1.78 foxr 5332: }
1.261 foxr 5333: #
5334: # Determine if a user is an author for the indicated domain.
5335: #
5336: # Parameters:
5337: # domain - domain to check in .
5338: # user - Name of user to check.
5339: #
5340: # Return:
5341: # 1 - User is an author for domain.
5342: # 0 - User is not an author for domain.
5343: sub is_author {
5344: my ($domain, $user) = @_;
5345:
5346: &Debug("is_author: $user @ $domain");
5347:
5348: my $hashref = &tie_user_hash($domain, $user, "roles",
5349: &GDBM_READER());
5350:
5351: # Author role should show up as a key /domain/_au
1.78 foxr 5352:
1.261 foxr 5353: my $key = "/$domain/_au";
5354: my $value = $hashref->{$key};
1.78 foxr 5355:
1.261 foxr 5356: if(defined($value)) {
5357: &Debug("$user @ $domain is an author");
5358: }
5359:
5360: return defined($value);
5361: }
1.78 foxr 5362: #
5363: # Checks to see if the input roleput request was to set
5364: # an author role. If so, invokes the lchtmldir script to set
5365: # up a correct public_html
5366: # Parameters:
5367: # request - The request sent to the rolesput subchunk.
5368: # We're looking for /domain/_au
5369: # domain - The domain in which the user is having roles doctored.
5370: # user - Name of the user for which the role is being put.
5371: # authtype - The authentication type associated with the user.
5372: #
1.289 albertel 5373: sub manage_permissions {
1.192 foxr 5374: my ($request, $domain, $user, $authtype) = @_;
1.78 foxr 5375:
1.261 foxr 5376: &Debug("manage_permissions: $request $domain $user $authtype");
5377:
1.78 foxr 5378: # See if the request is of the form /$domain/_au
1.289 albertel 5379: if($request =~ /^(\/\Q$domain\E\/_au)$/) { # It's an author rolesput...
1.78 foxr 5380: my $execdir = $perlvar{'lonDaemons'};
5381: my $userhome= "/home/$user" ;
1.134 albertel 5382: &logthis("system $execdir/lchtmldir $userhome $user $authtype");
1.261 foxr 5383: &Debug("Setting homedir permissions for $userhome");
1.78 foxr 5384: system("$execdir/lchtmldir $userhome $user $authtype");
5385: }
5386: }
1.222 foxr 5387:
5388:
5389: #
5390: # Return the full path of a user password file, whether it exists or not.
5391: # Parameters:
5392: # domain - Domain in which the password file lives.
5393: # user - name of the user.
5394: # Returns:
5395: # Full passwd path:
5396: #
5397: sub password_path {
5398: my ($domain, $user) = @_;
1.264 albertel 5399: return &propath($domain, $user).'/passwd';
1.222 foxr 5400: }
5401:
5402: # Password Filename
5403: # Returns the path to a passwd file given domain and user... only if
5404: # it exists.
5405: # Parameters:
5406: # domain - Domain in which to search.
5407: # user - username.
5408: # Returns:
5409: # - If the password file exists returns its path.
5410: # - If the password file does not exist, returns undefined.
5411: #
5412: sub password_filename {
5413: my ($domain, $user) = @_;
5414:
5415: Debug ("PasswordFilename called: dom = $domain user = $user");
5416:
5417: my $path = &password_path($domain, $user);
5418: Debug("PasswordFilename got path: $path");
5419: if(-e $path) {
5420: return $path;
5421: } else {
5422: return undef;
5423: }
5424: }
5425:
5426: #
5427: # Rewrite the contents of the user's passwd file.
5428: # Parameters:
5429: # domain - domain of the user.
5430: # name - User's name.
5431: # contents - New contents of the file.
5432: # Returns:
5433: # 0 - Failed.
5434: # 1 - Success.
5435: #
5436: sub rewrite_password_file {
5437: my ($domain, $user, $contents) = @_;
5438:
5439: my $file = &password_filename($domain, $user);
5440: if (defined $file) {
5441: my $pf = IO::File->new(">$file");
5442: if($pf) {
5443: print $pf "$contents\n";
5444: return 1;
5445: } else {
5446: return 0;
5447: }
5448: } else {
5449: return 0;
5450: }
5451:
5452: }
5453:
1.78 foxr 5454: #
1.222 foxr 5455: # get_auth_type - Determines the authorization type of a user in a domain.
1.78 foxr 5456:
5457: # Returns the authorization type or nouser if there is no such user.
5458: #
1.222 foxr 5459: sub get_auth_type
1.78 foxr 5460: {
1.192 foxr 5461:
5462: my ($domain, $user) = @_;
1.78 foxr 5463:
1.222 foxr 5464: Debug("get_auth_type( $domain, $user ) \n");
1.78 foxr 5465: my $proname = &propath($domain, $user);
5466: my $passwdfile = "$proname/passwd";
5467: if( -e $passwdfile ) {
5468: my $pf = IO::File->new($passwdfile);
5469: my $realpassword = <$pf>;
5470: chomp($realpassword);
1.79 foxr 5471: Debug("Password info = $realpassword\n");
1.78 foxr 5472: my ($authtype, $contentpwd) = split(/:/, $realpassword);
1.79 foxr 5473: Debug("Authtype = $authtype, content = $contentpwd\n");
1.259 raeburn 5474: return "$authtype:$contentpwd";
1.224 foxr 5475: } else {
1.79 foxr 5476: Debug("Returning nouser");
1.78 foxr 5477: return "nouser";
5478: }
1.1 albertel 5479: }
5480:
1.220 foxr 5481: #
5482: # Validate a user given their domain, name and password. This utility
5483: # function is used by both AuthenticateHandler and ChangePasswordHandler
5484: # to validate the login credentials of a user.
5485: # Parameters:
5486: # $domain - The domain being logged into (this is required due to
5487: # the capability for multihomed systems.
5488: # $user - The name of the user being validated.
5489: # $password - The user's propoposed password.
5490: #
5491: # Returns:
5492: # 1 - The domain,user,pasword triplet corresponds to a valid
5493: # user.
5494: # 0 - The domain,user,password triplet is not a valid user.
5495: #
5496: sub validate_user {
5497: my ($domain, $user, $password) = @_;
5498:
5499:
5500: # Why negative ~pi you may well ask? Well this function is about
5501: # authentication, and therefore very important to get right.
5502: # I've initialized the flag that determines whether or not I've
5503: # validated correctly to a value it's not supposed to get.
5504: # At the end of this function. I'll ensure that it's not still that
5505: # value so we don't just wind up returning some accidental value
5506: # as a result of executing an unforseen code path that
1.249 foxr 5507: # did not set $validated. At the end of valid execution paths,
5508: # validated shoule be 1 for success or 0 for failuer.
1.220 foxr 5509:
5510: my $validated = -3.14159;
5511:
5512: # How we authenticate is determined by the type of authentication
5513: # the user has been assigned. If the authentication type is
5514: # "nouser", the user does not exist so we will return 0.
5515:
1.222 foxr 5516: my $contents = &get_auth_type($domain, $user);
1.220 foxr 5517: my ($howpwd, $contentpwd) = split(/:/, $contents);
5518:
5519: my $null = pack("C",0); # Used by kerberos auth types.
5520:
5521: if ($howpwd ne 'nouser') {
5522:
5523: if($howpwd eq "internal") { # Encrypted is in local password file.
5524: $validated = (crypt($password, $contentpwd) eq $contentpwd);
5525: }
5526: elsif ($howpwd eq "unix") { # User is a normal unix user.
5527: $contentpwd = (getpwnam($user))[1];
5528: if($contentpwd) {
5529: if($contentpwd eq 'x') { # Shadow password file...
5530: my $pwauth_path = "/usr/local/sbin/pwauth";
5531: open PWAUTH, "|$pwauth_path" or
5532: die "Cannot invoke authentication";
5533: print PWAUTH "$user\n$password\n";
5534: close PWAUTH;
5535: $validated = ! $?;
5536:
5537: } else { # Passwords in /etc/passwd.
5538: $validated = (crypt($password,
5539: $contentpwd) eq $contentpwd);
5540: }
5541: } else {
5542: $validated = 0;
5543: }
5544: }
5545: elsif ($howpwd eq "krb4") { # user is in kerberos 4 auth. domain.
5546: if(! ($password =~ /$null/) ) {
5547: my $k4error = &Authen::Krb4::get_pw_in_tkt($user,
5548: "",
5549: $contentpwd,,
5550: 'krbtgt',
5551: $contentpwd,
5552: 1,
5553: $password);
5554: if(!$k4error) {
5555: $validated = 1;
1.224 foxr 5556: } else {
1.220 foxr 5557: $validated = 0;
5558: &logthis('krb4: '.$user.', '.$contentpwd.', '.
5559: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
5560: }
1.224 foxr 5561: } else {
1.220 foxr 5562: $validated = 0; # Password has a match with null.
5563: }
1.224 foxr 5564: } elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain.
1.220 foxr 5565: if(!($password =~ /$null/)) { # Null password not allowed.
5566: my $krbclient = &Authen::Krb5::parse_name($user.'@'
5567: .$contentpwd);
5568: my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd;
5569: my $krbserver = &Authen::Krb5::parse_name($krbservice);
5570: my $credentials= &Authen::Krb5::cc_default();
5571: $credentials->initialize($krbclient);
1.270 matthew 5572: my $krbreturn = &Authen::Krb5::get_in_tkt_with_password($krbclient,
1.220 foxr 5573: $krbserver,
5574: $password,
5575: $credentials);
5576: $validated = ($krbreturn == 1);
1.224 foxr 5577: } else {
1.220 foxr 5578: $validated = 0;
5579: }
1.224 foxr 5580: } elsif ($howpwd eq "localauth") {
1.220 foxr 5581: # Authenticate via installation specific authentcation method:
5582: $validated = &localauth::localauth($user,
5583: $password,
5584: $contentpwd);
1.224 foxr 5585: } else { # Unrecognized auth is also bad.
1.220 foxr 5586: $validated = 0;
5587: }
5588: } else {
5589: $validated = 0;
5590: }
5591: #
5592: # $validated has the correct stat of the authentication:
5593: #
5594:
5595: unless ($validated != -3.14159) {
1.249 foxr 5596: # I >really really< want to know if this happens.
5597: # since it indicates that user authentication is badly
5598: # broken in some code path.
5599: #
5600: die "ValidateUser - failed to set the value of validated $domain, $user $password";
1.220 foxr 5601: }
5602: return $validated;
5603: }
5604:
5605:
1.84 albertel 5606: sub addline {
5607: my ($fname,$hostid,$ip,$newline)=@_;
5608: my $contents;
5609: my $found=0;
5610: my $expr='^'.$hostid.':'.$ip.':';
5611: $expr =~ s/\./\\\./g;
1.134 albertel 5612: my $sh;
1.84 albertel 5613: if ($sh=IO::File->new("$fname.subscription")) {
5614: while (my $subline=<$sh>) {
5615: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
5616: }
5617: $sh->close();
5618: }
5619: $sh=IO::File->new(">$fname.subscription");
5620: if ($contents) { print $sh $contents; }
5621: if ($newline) { print $sh $newline; }
5622: $sh->close();
5623: return $found;
1.86 www 5624: }
5625:
1.234 foxr 5626: sub get_chat {
1.122 www 5627: my ($cdom,$cname,$udom,$uname)=@_;
1.87 www 5628: my %hash;
5629: my $proname=&propath($cdom,$cname);
5630: my @entries=();
1.88 albertel 5631: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
5632: &GDBM_READER(),0640)) {
5633: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
5634: untie %hash;
1.123 www 5635: }
1.124 www 5636: my @participants=();
1.134 albertel 5637: my $cutoff=time-60;
1.123 www 5638: if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db",
1.124 www 5639: &GDBM_WRCREAT(),0640)) {
5640: $hash{$uname.':'.$udom}=time;
1.123 www 5641: foreach (sort keys %hash) {
5642: if ($hash{$_}>$cutoff) {
1.124 www 5643: $participants[$#participants+1]='active_participant:'.$_;
1.123 www 5644: }
5645: }
5646: untie %hash;
1.86 www 5647: }
1.124 www 5648: return (@participants,@entries);
1.86 www 5649: }
5650:
1.234 foxr 5651: sub chat_add {
1.88 albertel 5652: my ($cdom,$cname,$newchat)=@_;
5653: my %hash;
5654: my $proname=&propath($cdom,$cname);
5655: my @entries=();
1.142 www 5656: my $time=time;
1.88 albertel 5657: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
5658: &GDBM_WRCREAT(),0640)) {
5659: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
5660: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
5661: my ($thentime,$idnum)=split(/\_/,$lastid);
5662: my $newid=$time.'_000000';
5663: if ($thentime==$time) {
5664: $idnum=~s/^0+//;
5665: $idnum++;
5666: $idnum=substr('000000'.$idnum,-6,6);
5667: $newid=$time.'_'.$idnum;
5668: }
5669: $hash{$newid}=$newchat;
5670: my $expired=$time-3600;
5671: foreach (keys %hash) {
5672: my ($thistime)=($_=~/(\d+)\_/);
5673: if ($thistime<$expired) {
1.89 www 5674: delete $hash{$_};
1.88 albertel 5675: }
5676: }
5677: untie %hash;
1.142 www 5678: }
5679: {
5680: my $hfh;
5681: if ($hfh=IO::File->new(">>$proname/chatroom.log")) {
5682: print $hfh "$time:".&unescape($newchat)."\n";
5683: }
1.86 www 5684: }
1.84 albertel 5685: }
5686:
5687: sub unsub {
5688: my ($fname,$clientip)=@_;
5689: my $result;
1.188 foxr 5690: my $unsubs = 0; # Number of successful unsubscribes:
5691:
5692:
5693: # An old way subscriptions were handled was to have a
5694: # subscription marker file:
5695:
5696: Debug("Attempting unlink of $fname.$clientname");
1.161 foxr 5697: if (unlink("$fname.$clientname")) {
1.188 foxr 5698: $unsubs++; # Successful unsub via marker file.
5699: }
5700:
5701: # The more modern way to do it is to have a subscription list
5702: # file:
5703:
1.84 albertel 5704: if (-e "$fname.subscription") {
1.161 foxr 5705: my $found=&addline($fname,$clientname,$clientip,'');
1.188 foxr 5706: if ($found) {
5707: $unsubs++;
5708: }
5709: }
5710:
5711: # If either or both of these mechanisms succeeded in unsubscribing a
5712: # resource we can return ok:
5713:
5714: if($unsubs) {
5715: $result = "ok\n";
1.84 albertel 5716: } else {
1.188 foxr 5717: $result = "not_subscribed\n";
1.84 albertel 5718: }
1.188 foxr 5719:
1.84 albertel 5720: return $result;
5721: }
5722:
1.101 www 5723: sub currentversion {
5724: my $fname=shift;
5725: my $version=-1;
5726: my $ulsdir='';
5727: if ($fname=~/^(.+)\/[^\/]+$/) {
5728: $ulsdir=$1;
5729: }
1.114 albertel 5730: my ($fnamere1,$fnamere2);
5731: # remove version if already specified
1.101 www 5732: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
1.114 albertel 5733: # get the bits that go before and after the version number
5734: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
5735: $fnamere1=$1;
5736: $fnamere2='.'.$2;
5737: }
1.101 www 5738: if (-e $fname) { $version=1; }
5739: if (-e $ulsdir) {
1.134 albertel 5740: if(-d $ulsdir) {
5741: if (opendir(LSDIR,$ulsdir)) {
5742: my $ulsfn;
5743: while ($ulsfn=readdir(LSDIR)) {
1.101 www 5744: # see if this is a regular file (ignore links produced earlier)
1.134 albertel 5745: my $thisfile=$ulsdir.'/'.$ulsfn;
5746: unless (-l $thisfile) {
1.160 www 5747: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
1.134 albertel 5748: if ($1>$version) { $version=$1; }
5749: }
5750: }
5751: }
5752: closedir(LSDIR);
5753: $version++;
5754: }
5755: }
5756: }
5757: return $version;
1.101 www 5758: }
5759:
5760: sub thisversion {
5761: my $fname=shift;
5762: my $version=-1;
5763: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
5764: $version=$1;
5765: }
5766: return $version;
5767: }
5768:
1.84 albertel 5769: sub subscribe {
5770: my ($userinput,$clientip)=@_;
5771: my $result;
1.293 albertel 5772: my ($cmd,$fname)=split(/:/,$userinput,2);
1.84 albertel 5773: my $ownership=&ishome($fname);
5774: if ($ownership eq 'owner') {
1.101 www 5775: # explitly asking for the current version?
5776: unless (-e $fname) {
5777: my $currentversion=¤tversion($fname);
5778: if (&thisversion($fname)==$currentversion) {
5779: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
5780: my $root=$1;
5781: my $extension=$2;
5782: symlink($root.'.'.$extension,
5783: $root.'.'.$currentversion.'.'.$extension);
1.102 www 5784: unless ($extension=~/\.meta$/) {
5785: symlink($root.'.'.$extension.'.meta',
5786: $root.'.'.$currentversion.'.'.$extension.'.meta');
5787: }
1.101 www 5788: }
5789: }
5790: }
1.84 albertel 5791: if (-e $fname) {
5792: if (-d $fname) {
5793: $result="directory\n";
5794: } else {
1.161 foxr 5795: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
1.134 albertel 5796: my $now=time;
1.161 foxr 5797: my $found=&addline($fname,$clientname,$clientip,
5798: "$clientname:$clientip:$now\n");
1.84 albertel 5799: if ($found) { $result="$fname\n"; }
5800: # if they were subscribed to only meta data, delete that
5801: # subscription, when you subscribe to a file you also get
5802: # the metadata
5803: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
5804: $fname=~s/\/home\/httpd\/html\/res/raw/;
5805: $fname="http://$thisserver/".$fname;
5806: $result="$fname\n";
5807: }
5808: } else {
5809: $result="not_found\n";
5810: }
5811: } else {
5812: $result="rejected\n";
5813: }
5814: return $result;
5815: }
1.287 foxr 5816: # Change the passwd of a unix user. The caller must have
5817: # first verified that the user is a loncapa user.
5818: #
5819: # Parameters:
5820: # user - Unix user name to change.
5821: # pass - New password for the user.
5822: # Returns:
5823: # ok - if success
5824: # other - Some meaningfule error message string.
5825: # NOTE:
5826: # invokes a setuid script to change the passwd.
5827: sub change_unix_password {
5828: my ($user, $pass) = @_;
5829:
5830: &Debug("change_unix_password");
5831: my $execdir=$perlvar{'lonDaemons'};
5832: &Debug("Opening lcpasswd pipeline");
5833: my $pf = IO::File->new("|$execdir/lcpasswd > "
5834: ."$perlvar{'lonDaemons'}"
5835: ."/logs/lcpasswd.log");
5836: print $pf "$user\n$pass\n$pass\n";
5837: close $pf;
5838: my $err = $?;
5839: return ($err < @passwderrors) ? $passwderrors[$err] :
5840: "pwchange_falure - unknown error";
5841:
5842:
5843: }
5844:
1.91 albertel 5845:
5846: sub make_passwd_file {
1.98 foxr 5847: my ($uname, $umode,$npass,$passfilename)=@_;
1.91 albertel 5848: my $result="ok\n";
5849: if ($umode eq 'krb4' or $umode eq 'krb5') {
5850: {
5851: my $pf = IO::File->new(">$passfilename");
1.261 foxr 5852: if ($pf) {
5853: print $pf "$umode:$npass\n";
5854: } else {
5855: $result = "pass_file_failed_error";
5856: }
1.91 albertel 5857: }
5858: } elsif ($umode eq 'internal') {
5859: my $salt=time;
5860: $salt=substr($salt,6,2);
5861: my $ncpass=crypt($npass,$salt);
5862: {
5863: &Debug("Creating internal auth");
5864: my $pf = IO::File->new(">$passfilename");
1.261 foxr 5865: if($pf) {
5866: print $pf "internal:$ncpass\n";
5867: } else {
5868: $result = "pass_file_failed_error";
5869: }
1.91 albertel 5870: }
5871: } elsif ($umode eq 'localauth') {
5872: {
5873: my $pf = IO::File->new(">$passfilename");
1.261 foxr 5874: if($pf) {
5875: print $pf "localauth:$npass\n";
5876: } else {
5877: $result = "pass_file_failed_error";
5878: }
1.91 albertel 5879: }
5880: } elsif ($umode eq 'unix') {
5881: {
1.186 foxr 5882: #
5883: # Don't allow the creation of privileged accounts!!! that would
5884: # be real bad!!!
5885: #
5886: my $uid = getpwnam($uname);
5887: if((defined $uid) && ($uid == 0)) {
5888: &logthis(">>>Attempted to create privilged account blocked");
5889: return "no_priv_account_error\n";
5890: }
5891:
1.223 foxr 5892: my $execpath ="$perlvar{'lonDaemons'}/"."lcuseradd";
1.224 foxr 5893:
5894: my $lc_error_file = $execdir."/tmp/lcuseradd".$$.".status";
1.91 albertel 5895: {
5896: &Debug("Executing external: ".$execpath);
1.98 foxr 5897: &Debug("user = ".$uname.", Password =". $npass);
1.132 matthew 5898: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
1.91 albertel 5899: print $se "$uname\n";
5900: print $se "$npass\n";
5901: print $se "$npass\n";
1.223 foxr 5902: print $se "$lc_error_file\n"; # Status -> unique file.
1.97 foxr 5903: }
1.285 foxr 5904: if (-r $lc_error_file) {
5905: &Debug("Opening error file: $lc_error_file");
5906: my $error = IO::File->new("< $lc_error_file");
5907: my $useraddok = <$error>;
5908: $error->close;
5909: unlink($lc_error_file);
5910:
5911: chomp $useraddok;
5912:
5913: if($useraddok > 0) {
5914: my $error_text = &lcuseraddstrerror($useraddok);
5915: &logthis("Failed lcuseradd: $error_text");
5916: $result = "lcuseradd_failed:$error_text\n";
5917: } else {
5918: my $pf = IO::File->new(">$passfilename");
5919: if($pf) {
5920: print $pf "unix:\n";
5921: } else {
5922: $result = "pass_file_failed_error";
5923: }
5924: }
1.224 foxr 5925: } else {
1.285 foxr 5926: &Debug("Could not locate lcuseradd error: $lc_error_file");
5927: $result="bug_lcuseradd_no_output_file";
1.91 albertel 5928: }
5929: }
5930: } elsif ($umode eq 'none') {
5931: {
1.223 foxr 5932: my $pf = IO::File->new("> $passfilename");
1.261 foxr 5933: if($pf) {
5934: print $pf "none:\n";
5935: } else {
5936: $result = "pass_file_failed_error";
5937: }
1.91 albertel 5938: }
5939: } else {
5940: $result="auth_mode_error\n";
5941: }
5942: return $result;
1.121 albertel 5943: }
5944:
1.265 albertel 5945: sub convert_photo {
5946: my ($start,$dest)=@_;
5947: system("convert $start $dest");
5948: }
5949:
1.121 albertel 5950: sub sethost {
5951: my ($remotereq) = @_;
5952: my (undef,$hostid)=split(/:/,$remotereq);
5953: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
5954: if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
1.200 matthew 5955: $currenthostid =$hostid;
1.121 albertel 5956: $currentdomainid=$hostdom{$hostid};
5957: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
5958: } else {
5959: &logthis("Requested host id $hostid not an alias of ".
5960: $perlvar{'lonHostID'}." refusing connection");
5961: return 'unable_to_set';
5962: }
5963: return 'ok';
5964: }
5965:
5966: sub version {
5967: my ($userinput)=@_;
5968: $remoteVERSION=(split(/:/,$userinput))[1];
5969: return "version:$VERSION";
1.127 albertel 5970: }
1.178 foxr 5971:
1.128 albertel 5972: #There is a copy of this in lonnet.pm
1.127 albertel 5973: sub userload {
5974: my $numusers=0;
5975: {
5976: opendir(LONIDS,$perlvar{'lonIDsDir'});
5977: my $filename;
5978: my $curtime=time;
5979: while ($filename=readdir(LONIDS)) {
5980: if ($filename eq '.' || $filename eq '..') {next;}
1.138 albertel 5981: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
1.159 albertel 5982: if ($curtime-$mtime < 1800) { $numusers++; }
1.127 albertel 5983: }
5984: closedir(LONIDS);
5985: }
5986: my $userloadpercent=0;
5987: my $maxuserload=$perlvar{'lonUserLoadLim'};
5988: if ($maxuserload) {
1.129 albertel 5989: $userloadpercent=100*$numusers/$maxuserload;
1.127 albertel 5990: }
1.130 albertel 5991: $userloadpercent=sprintf("%.2f",$userloadpercent);
1.127 albertel 5992: return $userloadpercent;
1.91 albertel 5993: }
5994:
1.205 raeburn 5995: # Routines for serializing arrays and hashes (copies from lonnet)
5996:
5997: sub array2str {
5998: my (@array) = @_;
5999: my $result=&arrayref2str(\@array);
6000: $result=~s/^__ARRAY_REF__//;
6001: $result=~s/__END_ARRAY_REF__$//;
6002: return $result;
6003: }
6004:
6005: sub arrayref2str {
6006: my ($arrayref) = @_;
6007: my $result='__ARRAY_REF__';
6008: foreach my $elem (@$arrayref) {
6009: if(ref($elem) eq 'ARRAY') {
6010: $result.=&arrayref2str($elem).'&';
6011: } elsif(ref($elem) eq 'HASH') {
6012: $result.=&hashref2str($elem).'&';
6013: } elsif(ref($elem)) {
6014: #print("Got a ref of ".(ref($elem))." skipping.");
6015: } else {
6016: $result.=&escape($elem).'&';
6017: }
6018: }
6019: $result=~s/\&$//;
6020: $result .= '__END_ARRAY_REF__';
6021: return $result;
6022: }
6023:
6024: sub hash2str {
6025: my (%hash) = @_;
6026: my $result=&hashref2str(\%hash);
6027: $result=~s/^__HASH_REF__//;
6028: $result=~s/__END_HASH_REF__$//;
6029: return $result;
6030: }
6031:
6032: sub hashref2str {
6033: my ($hashref)=@_;
6034: my $result='__HASH_REF__';
6035: foreach (sort(keys(%$hashref))) {
6036: if (ref($_) eq 'ARRAY') {
6037: $result.=&arrayref2str($_).'=';
6038: } elsif (ref($_) eq 'HASH') {
6039: $result.=&hashref2str($_).'=';
6040: } elsif (ref($_)) {
6041: $result.='=';
6042: #print("Got a ref of ".(ref($_))." skipping.");
6043: } else {
6044: if ($_) {$result.=&escape($_).'=';} else { last; }
6045: }
6046:
6047: if(ref($hashref->{$_}) eq 'ARRAY') {
6048: $result.=&arrayref2str($hashref->{$_}).'&';
6049: } elsif(ref($hashref->{$_}) eq 'HASH') {
6050: $result.=&hashref2str($hashref->{$_}).'&';
6051: } elsif(ref($hashref->{$_})) {
6052: $result.='&';
6053: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
6054: } else {
6055: $result.=&escape($hashref->{$_}).'&';
6056: }
6057: }
6058: $result=~s/\&$//;
6059: $result .= '__END_HASH_REF__';
6060: return $result;
6061: }
1.200 matthew 6062:
1.61 harris41 6063: # ----------------------------------- POD (plain old documentation, CPAN style)
6064:
6065: =head1 NAME
6066:
6067: lond - "LON Daemon" Server (port "LOND" 5663)
6068:
6069: =head1 SYNOPSIS
6070:
1.74 harris41 6071: Usage: B<lond>
6072:
6073: Should only be run as user=www. This is a command-line script which
6074: is invoked by B<loncron>. There is no expectation that a typical user
6075: will manually start B<lond> from the command-line. (In other words,
6076: DO NOT START B<lond> YOURSELF.)
1.61 harris41 6077:
6078: =head1 DESCRIPTION
6079:
1.74 harris41 6080: There are two characteristics associated with the running of B<lond>,
6081: PROCESS MANAGEMENT (starting, stopping, handling child processes)
6082: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
6083: subscriptions, etc). These are described in two large
6084: sections below.
6085:
6086: B<PROCESS MANAGEMENT>
6087:
1.61 harris41 6088: Preforker - server who forks first. Runs as a daemon. HUPs.
6089: Uses IDEA encryption
6090:
1.74 harris41 6091: B<lond> forks off children processes that correspond to the other servers
6092: in the network. Management of these processes can be done at the
6093: parent process level or the child process level.
6094:
6095: B<logs/lond.log> is the location of log messages.
6096:
6097: The process management is now explained in terms of linux shell commands,
6098: subroutines internal to this code, and signal assignments:
6099:
6100: =over 4
6101:
6102: =item *
6103:
6104: PID is stored in B<logs/lond.pid>
6105:
6106: This is the process id number of the parent B<lond> process.
6107:
6108: =item *
6109:
6110: SIGTERM and SIGINT
6111:
6112: Parent signal assignment:
6113: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
6114:
6115: Child signal assignment:
6116: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
6117: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
6118: to restart a new child.)
6119:
6120: Command-line invocations:
6121: B<kill> B<-s> SIGTERM I<PID>
6122: B<kill> B<-s> SIGINT I<PID>
6123:
6124: Subroutine B<HUNTSMAN>:
6125: This is only invoked for the B<lond> parent I<PID>.
6126: This kills all the children, and then the parent.
6127: The B<lonc.pid> file is cleared.
6128:
6129: =item *
6130:
6131: SIGHUP
6132:
6133: Current bug:
6134: This signal can only be processed the first time
6135: on the parent process. Subsequent SIGHUP signals
6136: have no effect.
6137:
6138: Parent signal assignment:
6139: $SIG{HUP} = \&HUPSMAN;
6140:
6141: Child signal assignment:
6142: none (nothing happens)
6143:
6144: Command-line invocations:
6145: B<kill> B<-s> SIGHUP I<PID>
6146:
6147: Subroutine B<HUPSMAN>:
6148: This is only invoked for the B<lond> parent I<PID>,
6149: This kills all the children, and then the parent.
6150: The B<lond.pid> file is cleared.
6151:
6152: =item *
6153:
6154: SIGUSR1
6155:
6156: Parent signal assignment:
6157: $SIG{USR1} = \&USRMAN;
6158:
6159: Child signal assignment:
6160: $SIG{USR1}= \&logstatus;
6161:
6162: Command-line invocations:
6163: B<kill> B<-s> SIGUSR1 I<PID>
6164:
6165: Subroutine B<USRMAN>:
6166: When invoked for the B<lond> parent I<PID>,
6167: SIGUSR1 is sent to all the children, and the status of
6168: each connection is logged.
1.144 foxr 6169:
6170: =item *
6171:
6172: SIGUSR2
6173:
6174: Parent Signal assignment:
6175: $SIG{USR2} = \&UpdateHosts
6176:
6177: Child signal assignment:
6178: NONE
6179:
1.74 harris41 6180:
6181: =item *
6182:
6183: SIGCHLD
6184:
6185: Parent signal assignment:
6186: $SIG{CHLD} = \&REAPER;
6187:
6188: Child signal assignment:
6189: none
6190:
6191: Command-line invocations:
6192: B<kill> B<-s> SIGCHLD I<PID>
6193:
6194: Subroutine B<REAPER>:
6195: This is only invoked for the B<lond> parent I<PID>.
6196: Information pertaining to the child is removed.
6197: The socket port is cleaned up.
6198:
6199: =back
6200:
6201: B<SERVER-SIDE ACTIVITIES>
6202:
6203: Server-side information can be accepted in an encrypted or non-encrypted
6204: method.
6205:
6206: =over 4
6207:
6208: =item ping
6209:
6210: Query a client in the hosts.tab table; "Are you there?"
6211:
6212: =item pong
6213:
6214: Respond to a ping query.
6215:
6216: =item ekey
6217:
6218: Read in encrypted key, make cipher. Respond with a buildkey.
6219:
6220: =item load
6221:
6222: Respond with CPU load based on a computation upon /proc/loadavg.
6223:
6224: =item currentauth
6225:
6226: Reply with current authentication information (only over an
6227: encrypted channel).
6228:
6229: =item auth
6230:
6231: Only over an encrypted channel, reply as to whether a user's
6232: authentication information can be validated.
6233:
6234: =item passwd
6235:
6236: Allow for a password to be set.
6237:
6238: =item makeuser
6239:
6240: Make a user.
6241:
6242: =item passwd
6243:
6244: Allow for authentication mechanism and password to be changed.
6245:
6246: =item home
1.61 harris41 6247:
1.74 harris41 6248: Respond to a question "are you the home for a given user?"
6249:
6250: =item update
6251:
6252: Update contents of a subscribed resource.
6253:
6254: =item unsubscribe
6255:
6256: The server is unsubscribing from a resource.
6257:
6258: =item subscribe
6259:
6260: The server is subscribing to a resource.
6261:
6262: =item log
6263:
6264: Place in B<logs/lond.log>
6265:
6266: =item put
6267:
6268: stores hash in namespace
6269:
1.230 foxr 6270: =item rolesputy
1.74 harris41 6271:
6272: put a role into a user's environment
6273:
6274: =item get
6275:
6276: returns hash with keys from array
6277: reference filled in from namespace
6278:
6279: =item eget
6280:
6281: returns hash with keys from array
6282: reference filled in from namesp (encrypts the return communication)
6283:
6284: =item rolesget
6285:
6286: get a role from a user's environment
6287:
6288: =item del
6289:
6290: deletes keys out of array from namespace
6291:
6292: =item keys
6293:
6294: returns namespace keys
6295:
6296: =item dump
6297:
6298: dumps the complete (or key matching regexp) namespace into a hash
6299:
6300: =item store
6301:
6302: stores hash permanently
6303: for this url; hashref needs to be given and should be a \%hashname; the
6304: remaining args aren't required and if they aren't passed or are '' they will
6305: be derived from the ENV
6306:
6307: =item restore
6308:
6309: returns a hash for a given url
6310:
6311: =item querysend
6312:
6313: Tells client about the lonsql process that has been launched in response
6314: to a sent query.
6315:
6316: =item queryreply
6317:
6318: Accept information from lonsql and make appropriate storage in temporary
6319: file space.
6320:
6321: =item idput
6322:
6323: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
6324: for each student, defined perhaps by the institutional Registrar.)
6325:
6326: =item idget
6327:
6328: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
6329: for each student, defined perhaps by the institutional Registrar.)
6330:
6331: =item tmpput
6332:
6333: Accept and store information in temporary space.
6334:
6335: =item tmpget
6336:
6337: Send along temporarily stored information.
6338:
6339: =item ls
6340:
6341: List part of a user's directory.
6342:
1.135 foxr 6343: =item pushtable
6344:
6345: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
6346: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
6347: must be restored manually in case of a problem with the new table file.
6348: pushtable requires that the request be encrypted and validated via
6349: ValidateManager. The form of the command is:
6350: enc:pushtable tablename <tablecontents> \n
6351: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
6352: cleartext newline.
6353:
1.74 harris41 6354: =item Hanging up (exit or init)
6355:
6356: What to do when a client tells the server that they (the client)
6357: are leaving the network.
6358:
6359: =item unknown command
6360:
6361: If B<lond> is sent an unknown command (not in the list above),
6362: it replys to the client "unknown_cmd".
1.135 foxr 6363:
1.74 harris41 6364:
6365: =item UNKNOWN CLIENT
6366:
6367: If the anti-spoofing algorithm cannot verify the client,
6368: the client is rejected (with a "refused" message sent
6369: to the client, and the connection is closed.
6370:
6371: =back
1.61 harris41 6372:
6373: =head1 PREREQUISITES
6374:
6375: IO::Socket
6376: IO::File
6377: Apache::File
6378: Symbol
6379: POSIX
6380: Crypt::IDEA
6381: LWP::UserAgent()
6382: GDBM_File
6383: Authen::Krb4
1.91 albertel 6384: Authen::Krb5
1.61 harris41 6385:
6386: =head1 COREQUISITES
6387:
6388: =head1 OSNAMES
6389:
6390: linux
6391:
6392: =head1 SCRIPT CATEGORIES
6393:
6394: Server/Process
6395:
6396: =cut
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