Annotation of loncom/lond, revision 1.272
1.1 albertel 1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
1.60 www 4: #
1.272 ! raeburn 5: # $Id: lond,v 1.271 2004/12/31 01:24:14 raeburn Exp $
1.60 www 6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
1.167 foxr 13: # the Free Software Foundation; either version 2 of the License, or
1.60 www 14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
1.178 foxr 23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
1.60 www 24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
1.161 foxr 27:
28:
1.60 www 29: # http://www.lon-capa.org/
30: #
1.54 harris41 31:
1.134 albertel 32: use strict;
1.80 harris41 33: use lib '/home/httpd/lib/perl/';
34: use LONCAPA::Configuration;
35:
1.1 albertel 36: use IO::Socket;
37: use IO::File;
1.126 albertel 38: #use Apache::File;
1.1 albertel 39: use Symbol;
40: use POSIX;
41: use Crypt::IDEA;
42: use LWP::UserAgent();
1.3 www 43: use GDBM_File;
44: use Authen::Krb4;
1.91 albertel 45: use Authen::Krb5;
1.49 albertel 46: use lib '/home/httpd/lib/perl/';
47: use localauth;
1.193 raeburn 48: use localenroll;
1.265 albertel 49: use localstudentphoto;
1.143 foxr 50: use File::Copy;
1.169 foxr 51: use LONCAPA::ConfigFileEdit;
1.200 matthew 52: use LONCAPA::lonlocal;
53: use LONCAPA::lonssl;
1.221 albertel 54: use Fcntl qw(:flock);
1.1 albertel 55:
1.239 foxr 56: my $DEBUG = 0; # Non zero to enable debug log entries.
1.77 foxr 57:
1.57 www 58: my $status='';
59: my $lastlog='';
60:
1.272 ! raeburn 61: my $VERSION='$Revision: 1.271 $'; #' stupid emacs
1.121 albertel 62: my $remoteVERSION;
1.214 foxr 63: my $currenthostid="default";
1.115 albertel 64: my $currentdomainid;
1.134 albertel 65:
66: my $client;
1.200 matthew 67: my $clientip; # IP address of client.
68: my $clientdns; # DNS name of client.
69: my $clientname; # LonCAPA name of client.
1.140 foxr 70:
1.134 albertel 71: my $server;
1.200 matthew 72: my $thisserver; # DNS of us.
73:
74: my $keymode;
1.198 foxr 75:
1.207 foxr 76: my $cipher; # Cipher key negotiated with client
77: my $tmpsnum = 0; # Id of tmpputs.
78:
1.178 foxr 79: #
80: # Connection type is:
81: # client - All client actions are allowed
82: # manager - only management functions allowed.
83: # both - Both management and client actions are allowed
84: #
1.161 foxr 85:
1.178 foxr 86: my $ConnectionType;
1.161 foxr 87:
1.200 matthew 88: my %hostid; # ID's for hosts in cluster by ip.
89: my %hostdom; # LonCAPA domain for hosts in cluster.
90: my %hostip; # IPs for hosts in cluster.
91: my %hostdns; # ID's of hosts looked up by DNS name.
1.161 foxr 92:
1.178 foxr 93: my %managers; # Ip -> manager names
1.161 foxr 94:
1.178 foxr 95: my %perlvar; # Will have the apache conf defined perl vars.
1.134 albertel 96:
1.178 foxr 97: #
1.207 foxr 98: # The hash below is used for command dispatching, and is therefore keyed on the request keyword.
99: # Each element of the hash contains a reference to an array that contains:
100: # A reference to a sub that executes the request corresponding to the keyword.
101: # A flag that is true if the request must be encoded to be acceptable.
102: # A mask with bits as follows:
103: # CLIENT_OK - Set when the function is allowed by ordinary clients
104: # MANAGER_OK - Set when the function is allowed to manager clients.
105: #
106: my $CLIENT_OK = 1;
107: my $MANAGER_OK = 2;
108: my %Dispatcher;
109:
110:
111: #
1.178 foxr 112: # The array below are password error strings."
113: #
114: my $lastpwderror = 13; # Largest error number from lcpasswd.
115: my @passwderrors = ("ok",
116: "lcpasswd must be run as user 'www'",
117: "lcpasswd got incorrect number of arguments",
118: "lcpasswd did not get the right nubmer of input text lines",
119: "lcpasswd too many simultaneous pwd changes in progress",
120: "lcpasswd User does not exist.",
121: "lcpasswd Incorrect current passwd",
122: "lcpasswd Unable to su to root.",
123: "lcpasswd Cannot set new passwd.",
124: "lcpasswd Username has invalid characters",
125: "lcpasswd Invalid characters in password",
1.223 foxr 126: "lcpasswd User already exists",
127: "lcpasswd Something went wrong with user addition.",
128: "lcpasswd Password mismatch",
129: "lcpasswd Error filename is invalid");
1.97 foxr 130:
131:
1.178 foxr 132: # The array below are lcuseradd error strings.:
1.97 foxr 133:
1.178 foxr 134: my $lastadderror = 13;
135: my @adderrors = ("ok",
136: "User ID mismatch, lcuseradd must run as user www",
137: "lcuseradd Incorrect number of command line parameters must be 3",
138: "lcuseradd Incorrect number of stdinput lines, must be 3",
139: "lcuseradd Too many other simultaneous pwd changes in progress",
140: "lcuseradd User does not exist",
141: "lcuseradd Unable to make www member of users's group",
142: "lcuseradd Unable to su to root",
143: "lcuseradd Unable to set password",
144: "lcuseradd Usrname has invalid characters",
145: "lcuseradd Password has an invalid character",
146: "lcuseradd User already exists",
147: "lcuseradd Could not add user.",
148: "lcuseradd Password mismatch");
1.97 foxr 149:
1.96 foxr 150:
1.207 foxr 151:
152: #
153: # Statistics that are maintained and dislayed in the status line.
154: #
1.212 foxr 155: my $Transactions = 0; # Number of attempted transactions.
156: my $Failures = 0; # Number of transcations failed.
1.207 foxr 157:
158: # ResetStatistics:
159: # Resets the statistics counters:
160: #
161: sub ResetStatistics {
162: $Transactions = 0;
163: $Failures = 0;
164: }
165:
1.200 matthew 166: #------------------------------------------------------------------------
167: #
168: # LocalConnection
169: # Completes the formation of a locally authenticated connection.
170: # This function will ensure that the 'remote' client is really the
171: # local host. If not, the connection is closed, and the function fails.
172: # If so, initcmd is parsed for the name of a file containing the
173: # IDEA session key. The fie is opened, read, deleted and the session
174: # key returned to the caller.
175: #
176: # Parameters:
177: # $Socket - Socket open on client.
178: # $initcmd - The full text of the init command.
179: #
180: # Implicit inputs:
181: # $clientdns - The DNS name of the remote client.
182: # $thisserver - Our DNS name.
183: #
184: # Returns:
185: # IDEA session key on success.
186: # undef on failure.
187: #
188: sub LocalConnection {
189: my ($Socket, $initcmd) = @_;
190: Debug("Attempting local connection: $initcmd client: $clientdns me: $thisserver");
191: if($clientdns ne $thisserver) {
192: &logthis('<font color="red"> LocalConnection rejecting non local: '
193: ."$clientdns ne $thisserver </font>");
194: close $Socket;
195: return undef;
1.224 foxr 196: } else {
1.200 matthew 197: chomp($initcmd); # Get rid of \n in filename.
198: my ($init, $type, $name) = split(/:/, $initcmd);
199: Debug(" Init command: $init $type $name ");
200:
201: # Require that $init = init, and $type = local: Otherwise
202: # the caller is insane:
203:
204: if(($init ne "init") && ($type ne "local")) {
205: &logthis('<font color = "red"> LocalConnection: caller is insane! '
206: ."init = $init, and type = $type </font>");
207: close($Socket);;
208: return undef;
209:
210: }
211: # Now get the key filename:
212:
213: my $IDEAKey = lonlocal::ReadKeyFile($name);
214: return $IDEAKey;
215: }
216: }
217: #------------------------------------------------------------------------------
218: #
219: # SSLConnection
220: # Completes the formation of an ssh authenticated connection. The
221: # socket is promoted to an ssl socket. If this promotion and the associated
222: # certificate exchange are successful, the IDEA key is generated and sent
223: # to the remote peer via the SSL tunnel. The IDEA key is also returned to
224: # the caller after the SSL tunnel is torn down.
225: #
226: # Parameters:
227: # Name Type Purpose
228: # $Socket IO::Socket::INET Plaintext socket.
229: #
230: # Returns:
231: # IDEA key on success.
232: # undef on failure.
233: #
234: sub SSLConnection {
235: my $Socket = shift;
236:
237: Debug("SSLConnection: ");
238: my $KeyFile = lonssl::KeyFile();
239: if(!$KeyFile) {
240: my $err = lonssl::LastError();
241: &logthis("<font color=\"red\"> CRITICAL"
242: ."Can't get key file $err </font>");
243: return undef;
244: }
245: my ($CACertificate,
246: $Certificate) = lonssl::CertificateFile();
247:
248:
249: # If any of the key, certificate or certificate authority
250: # certificate filenames are not defined, this can't work.
251:
252: if((!$Certificate) || (!$CACertificate)) {
253: my $err = lonssl::LastError();
254: &logthis("<font color=\"red\"> CRITICAL"
255: ."Can't get certificates: $err </font>");
256:
257: return undef;
258: }
259: Debug("Key: $KeyFile CA: $CACertificate Cert: $Certificate");
260:
261: # Indicate to our peer that we can procede with
262: # a transition to ssl authentication:
263:
264: print $Socket "ok:ssl\n";
265:
266: Debug("Approving promotion -> ssl");
267: # And do so:
268:
269: my $SSLSocket = lonssl::PromoteServerSocket($Socket,
270: $CACertificate,
271: $Certificate,
272: $KeyFile);
273: if(! ($SSLSocket) ) { # SSL socket promotion failed.
274: my $err = lonssl::LastError();
275: &logthis("<font color=\"red\"> CRITICAL "
276: ."SSL Socket promotion failed: $err </font>");
277: return undef;
278: }
279: Debug("SSL Promotion successful");
280:
281: #
282: # The only thing we'll use the socket for is to send the IDEA key
283: # to the peer:
284:
285: my $Key = lonlocal::CreateCipherKey();
286: print $SSLSocket "$Key\n";
287:
288: lonssl::Close($SSLSocket);
289:
290: Debug("Key exchange complete: $Key");
291:
292: return $Key;
293: }
294: #
295: # InsecureConnection:
296: # If insecure connections are allowd,
297: # exchange a challenge with the client to 'validate' the
298: # client (not really, but that's the protocol):
299: # We produce a challenge string that's sent to the client.
300: # The client must then echo the challenge verbatim to us.
301: #
302: # Parameter:
303: # Socket - Socket open on the client.
304: # Returns:
305: # 1 - success.
306: # 0 - failure (e.g.mismatch or insecure not allowed).
307: #
308: sub InsecureConnection {
309: my $Socket = shift;
310:
311: # Don't even start if insecure connections are not allowed.
312:
313: if(! $perlvar{londAllowInsecure}) { # Insecure connections not allowed.
314: return 0;
315: }
316:
317: # Fabricate a challenge string and send it..
318:
319: my $challenge = "$$".time; # pid + time.
320: print $Socket "$challenge\n";
321: &status("Waiting for challenge reply");
322:
323: my $answer = <$Socket>;
324: $answer =~s/\W//g;
325: if($challenge eq $answer) {
326: return 1;
1.224 foxr 327: } else {
1.200 matthew 328: logthis("<font color='blue'>WARNING client did not respond to challenge</font>");
329: &status("No challenge reqply");
330: return 0;
331: }
332:
333:
334: }
1.251 foxr 335: #
336: # Safely execute a command (as long as it's not a shel command and doesn
337: # not require/rely on shell escapes. The function operates by doing a
338: # a pipe based fork and capturing stdout and stderr from the pipe.
339: #
340: # Formal Parameters:
341: # $line - A line of text to be executed as a command.
342: # Returns:
343: # The output from that command. If the output is multiline the caller
344: # must know how to split up the output.
345: #
346: #
347: sub execute_command {
348: my ($line) = @_;
349: my @words = split(/\s/, $line); # Bust the command up into words.
350: my $output = "";
351:
352: my $pid = open(CHILD, "-|");
353:
354: if($pid) { # Parent process
355: Debug("In parent process for execute_command");
356: my @data = <CHILD>; # Read the child's outupt...
357: close CHILD;
358: foreach my $output_line (@data) {
359: Debug("Adding $output_line");
360: $output .= $output_line; # Presumably has a \n on it.
361: }
362:
363: } else { # Child process
364: close (STDERR);
365: open (STDERR, ">&STDOUT");# Combine stderr, and stdout...
366: exec(@words); # won't return.
367: }
368: return $output;
369: }
370:
1.200 matthew 371:
1.140 foxr 372: # GetCertificate: Given a transaction that requires a certificate,
373: # this function will extract the certificate from the transaction
374: # request. Note that at this point, the only concept of a certificate
375: # is the hostname to which we are connected.
376: #
377: # Parameter:
378: # request - The request sent by our client (this parameterization may
379: # need to change when we really use a certificate granting
380: # authority.
381: #
382: sub GetCertificate {
383: my $request = shift;
384:
385: return $clientip;
386: }
1.161 foxr 387:
1.178 foxr 388: #
389: # Return true if client is a manager.
390: #
391: sub isManager {
392: return (($ConnectionType eq "manager") || ($ConnectionType eq "both"));
393: }
394: #
395: # Return tru if client can do client functions
396: #
397: sub isClient {
398: return (($ConnectionType eq "client") || ($ConnectionType eq "both"));
399: }
1.161 foxr 400:
401:
1.156 foxr 402: #
403: # ReadManagerTable: Reads in the current manager table. For now this is
404: # done on each manager authentication because:
405: # - These authentications are not frequent
406: # - This allows dynamic changes to the manager table
407: # without the need to signal to the lond.
408: #
409: sub ReadManagerTable {
410:
411: # Clean out the old table first..
412:
1.166 foxr 413: foreach my $key (keys %managers) {
414: delete $managers{$key};
415: }
416:
417: my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
418: if (!open (MANAGERS, $tablename)) {
419: logthis('<font color="red">No manager table. Nobody can manage!!</font>');
420: return;
421: }
422: while(my $host = <MANAGERS>) {
423: chomp($host);
424: if ($host =~ "^#") { # Comment line.
425: next;
426: }
427: if (!defined $hostip{$host}) { # This is a non cluster member
1.161 foxr 428: # The entry is of the form:
429: # cluname:hostname
430: # cluname - A 'cluster hostname' is needed in order to negotiate
431: # the host key.
432: # hostname- The dns name of the host.
433: #
1.166 foxr 434: my($cluname, $dnsname) = split(/:/, $host);
435:
436: my $ip = gethostbyname($dnsname);
437: if(defined($ip)) { # bad names don't deserve entry.
438: my $hostip = inet_ntoa($ip);
439: $managers{$hostip} = $cluname;
440: logthis('<font color="green"> registering manager '.
441: "$dnsname as $cluname with $hostip </font>\n");
442: }
443: } else {
444: logthis('<font color="green"> existing host'." $host</font>\n");
445: $managers{$hostip{$host}} = $host; # Use info from cluster tab if clumemeber
446: }
447: }
1.156 foxr 448: }
1.140 foxr 449:
450: #
451: # ValidManager: Determines if a given certificate represents a valid manager.
452: # in this primitive implementation, the 'certificate' is
453: # just the connecting loncapa client name. This is checked
454: # against a valid client list in the configuration.
455: #
456: #
457: sub ValidManager {
458: my $certificate = shift;
459:
1.163 foxr 460: return isManager;
1.140 foxr 461: }
462: #
1.143 foxr 463: # CopyFile: Called as part of the process of installing a
464: # new configuration file. This function copies an existing
465: # file to a backup file.
466: # Parameters:
467: # oldfile - Name of the file to backup.
468: # newfile - Name of the backup file.
469: # Return:
470: # 0 - Failure (errno has failure reason).
471: # 1 - Success.
472: #
473: sub CopyFile {
1.192 foxr 474:
475: my ($oldfile, $newfile) = @_;
1.143 foxr 476:
477: # The file must exist:
478:
479: if(-e $oldfile) {
480:
481: # Read the old file.
482:
483: my $oldfh = IO::File->new("< $oldfile");
484: if(!$oldfh) {
485: return 0;
486: }
487: my @contents = <$oldfh>; # Suck in the entire file.
488:
489: # write the backup file:
490:
491: my $newfh = IO::File->new("> $newfile");
492: if(!(defined $newfh)){
493: return 0;
494: }
495: my $lines = scalar @contents;
496: for (my $i =0; $i < $lines; $i++) {
497: print $newfh ($contents[$i]);
498: }
499:
500: $oldfh->close;
501: $newfh->close;
502:
503: chmod(0660, $newfile);
504:
505: return 1;
506:
507: } else {
508: return 0;
509: }
510: }
1.157 foxr 511: #
512: # Host files are passed out with externally visible host IPs.
513: # If, for example, we are behind a fire-wall or NAT host, our
514: # internally visible IP may be different than the externally
515: # visible IP. Therefore, we always adjust the contents of the
516: # host file so that the entry for ME is the IP that we believe
517: # we have. At present, this is defined as the entry that
518: # DNS has for us. If by some chance we are not able to get a
519: # DNS translation for us, then we assume that the host.tab file
520: # is correct.
521: # BUGBUGBUG - in the future, we really should see if we can
522: # easily query the interface(s) instead.
523: # Parameter(s):
524: # contents - The contents of the host.tab to check.
525: # Returns:
526: # newcontents - The adjusted contents.
527: #
528: #
529: sub AdjustHostContents {
530: my $contents = shift;
531: my $adjusted;
532: my $me = $perlvar{'lonHostID'};
533:
1.166 foxr 534: foreach my $line (split(/\n/,$contents)) {
1.157 foxr 535: if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/))) {
536: chomp($line);
537: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
538: if ($id eq $me) {
1.166 foxr 539: my $ip = gethostbyname($name);
540: my $ipnew = inet_ntoa($ip);
541: $ip = $ipnew;
1.157 foxr 542: # Reconstruct the host line and append to adjusted:
543:
1.166 foxr 544: my $newline = "$id:$domain:$role:$name:$ip";
545: if($maxcon ne "") { # Not all hosts have loncnew tuning params
546: $newline .= ":$maxcon:$idleto:$mincon";
547: }
548: $adjusted .= $newline."\n";
1.157 foxr 549:
1.166 foxr 550: } else { # Not me, pass unmodified.
551: $adjusted .= $line."\n";
552: }
1.157 foxr 553: } else { # Blank or comment never re-written.
554: $adjusted .= $line."\n"; # Pass blanks and comments as is.
555: }
1.166 foxr 556: }
557: return $adjusted;
1.157 foxr 558: }
1.143 foxr 559: #
560: # InstallFile: Called to install an administrative file:
561: # - The file is created with <name>.tmp
562: # - The <name>.tmp file is then mv'd to <name>
563: # This lugubrious procedure is done to ensure that we are never without
564: # a valid, even if dated, version of the file regardless of who crashes
565: # and when the crash occurs.
566: #
567: # Parameters:
568: # Name of the file
569: # File Contents.
570: # Return:
571: # nonzero - success.
572: # 0 - failure and $! has an errno.
573: #
574: sub InstallFile {
1.192 foxr 575:
576: my ($Filename, $Contents) = @_;
1.143 foxr 577: my $TempFile = $Filename.".tmp";
578:
579: # Open the file for write:
580:
581: my $fh = IO::File->new("> $TempFile"); # Write to temp.
582: if(!(defined $fh)) {
583: &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
584: return 0;
585: }
586: # write the contents of the file:
587:
588: print $fh ($Contents);
589: $fh->close; # In case we ever have a filesystem w. locking
590:
591: chmod(0660, $TempFile);
592:
593: # Now we can move install the file in position.
594:
595: move($TempFile, $Filename);
596:
597: return 1;
598: }
1.200 matthew 599:
600:
1.169 foxr 601: #
602: # ConfigFileFromSelector: converts a configuration file selector
603: # (one of host or domain at this point) into a
604: # configuration file pathname.
605: #
606: # Parameters:
607: # selector - Configuration file selector.
608: # Returns:
609: # Full path to the file or undef if the selector is invalid.
610: #
611: sub ConfigFileFromSelector {
612: my $selector = shift;
613: my $tablefile;
614:
615: my $tabledir = $perlvar{'lonTabDir'}.'/';
616: if ($selector eq "hosts") {
617: $tablefile = $tabledir."hosts.tab";
618: } elsif ($selector eq "domain") {
619: $tablefile = $tabledir."domain.tab";
620: } else {
621: return undef;
622: }
623: return $tablefile;
1.143 foxr 624:
1.169 foxr 625: }
1.143 foxr 626: #
1.141 foxr 627: # PushFile: Called to do an administrative push of a file.
628: # - Ensure the file being pushed is one we support.
629: # - Backup the old file to <filename.saved>
630: # - Separate the contents of the new file out from the
631: # rest of the request.
632: # - Write the new file.
633: # Parameter:
634: # Request - The entire user request. This consists of a : separated
635: # string pushfile:tablename:contents.
636: # NOTE: The contents may have :'s in it as well making things a bit
637: # more interesting... but not much.
638: # Returns:
639: # String to send to client ("ok" or "refused" if bad file).
640: #
641: sub PushFile {
642: my $request = shift;
643: my ($command, $filename, $contents) = split(":", $request, 3);
644:
645: # At this point in time, pushes for only the following tables are
646: # supported:
647: # hosts.tab ($filename eq host).
648: # domain.tab ($filename eq domain).
649: # Construct the destination filename or reject the request.
650: #
651: # lonManage is supposed to ensure this, however this session could be
652: # part of some elaborate spoof that managed somehow to authenticate.
653: #
654:
1.169 foxr 655:
656: my $tablefile = ConfigFileFromSelector($filename);
657: if(! (defined $tablefile)) {
1.141 foxr 658: return "refused";
659: }
660: #
661: # >copy< the old table to the backup table
662: # don't rename in case system crashes/reboots etc. in the time
663: # window between a rename and write.
664: #
665: my $backupfile = $tablefile;
666: $backupfile =~ s/\.tab$/.old/;
1.143 foxr 667: if(!CopyFile($tablefile, $backupfile)) {
668: &logthis('<font color="green"> CopyFile from '.$tablefile." to ".$backupfile." failed </font>");
669: return "error:$!";
670: }
1.141 foxr 671: &logthis('<font color="green"> Pushfile: backed up '
672: .$tablefile." to $backupfile</font>");
673:
1.157 foxr 674: # If the file being pushed is the host file, we adjust the entry for ourself so that the
675: # IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible
676: # to conceive of conditions where we don't have a DNS entry locally. This is possible in a
677: # network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
678: # that possibilty.
679:
680: if($filename eq "host") {
681: $contents = AdjustHostContents($contents);
682: }
683:
1.141 foxr 684: # Install the new file:
685:
1.143 foxr 686: if(!InstallFile($tablefile, $contents)) {
687: &logthis('<font color="red"> Pushfile: unable to install '
1.145 foxr 688: .$tablefile." $! </font>");
1.143 foxr 689: return "error:$!";
1.224 foxr 690: } else {
1.143 foxr 691: &logthis('<font color="green"> Installed new '.$tablefile
692: ."</font>");
693:
694: }
695:
1.141 foxr 696:
697: # Indicate success:
698:
699: return "ok";
700:
701: }
1.145 foxr 702:
703: #
704: # Called to re-init either lonc or lond.
705: #
706: # Parameters:
707: # request - The full request by the client. This is of the form
708: # reinit:<process>
709: # where <process> is allowed to be either of
710: # lonc or lond
711: #
712: # Returns:
713: # The string to be sent back to the client either:
714: # ok - Everything worked just fine.
715: # error:why - There was a failure and why describes the reason.
716: #
717: #
718: sub ReinitProcess {
719: my $request = shift;
720:
1.146 foxr 721:
722: # separate the request (reinit) from the process identifier and
723: # validate it producing the name of the .pid file for the process.
724: #
725: #
726: my ($junk, $process) = split(":", $request);
1.147 foxr 727: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
1.146 foxr 728: if($process eq 'lonc') {
729: $processpidfile = $processpidfile."lonc.pid";
1.147 foxr 730: if (!open(PIDFILE, "< $processpidfile")) {
731: return "error:Open failed for $processpidfile";
732: }
733: my $loncpid = <PIDFILE>;
734: close(PIDFILE);
735: logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
736: ."</font>");
737: kill("USR2", $loncpid);
1.146 foxr 738: } elsif ($process eq 'lond') {
1.147 foxr 739: logthis('<font color="red"> Reinitializing self (lond) </font>');
740: &UpdateHosts; # Lond is us!!
1.146 foxr 741: } else {
742: &logthis('<font color="yellow" Invalid reinit request for '.$process
743: ."</font>");
744: return "error:Invalid process identifier $process";
745: }
1.145 foxr 746: return 'ok';
747: }
1.168 foxr 748: # Validate a line in a configuration file edit script:
749: # Validation includes:
750: # - Ensuring the command is valid.
751: # - Ensuring the command has sufficient parameters
752: # Parameters:
753: # scriptline - A line to validate (\n has been stripped for what it's worth).
1.167 foxr 754: #
1.168 foxr 755: # Return:
756: # 0 - Invalid scriptline.
757: # 1 - Valid scriptline
758: # NOTE:
759: # Only the command syntax is checked, not the executability of the
760: # command.
761: #
762: sub isValidEditCommand {
763: my $scriptline = shift;
764:
765: # Line elements are pipe separated:
766:
767: my ($command, $key, $newline) = split(/\|/, $scriptline);
768: &logthis('<font color="green"> isValideditCommand checking: '.
769: "Command = '$command', Key = '$key', Newline = '$newline' </font>\n");
770:
771: if ($command eq "delete") {
772: #
773: # key with no newline.
774: #
775: if( ($key eq "") || ($newline ne "")) {
776: return 0; # Must have key but no newline.
777: } else {
778: return 1; # Valid syntax.
779: }
1.169 foxr 780: } elsif ($command eq "replace") {
1.168 foxr 781: #
782: # key and newline:
783: #
784: if (($key eq "") || ($newline eq "")) {
785: return 0;
786: } else {
787: return 1;
788: }
1.169 foxr 789: } elsif ($command eq "append") {
790: if (($key ne "") && ($newline eq "")) {
791: return 1;
792: } else {
793: return 0;
794: }
1.168 foxr 795: } else {
796: return 0; # Invalid command.
797: }
798: return 0; # Should not get here!!!
799: }
1.169 foxr 800: #
801: # ApplyEdit - Applies an edit command to a line in a configuration
802: # file. It is the caller's responsiblity to validate the
803: # edit line.
804: # Parameters:
805: # $directive - A single edit directive to apply.
806: # Edit directives are of the form:
807: # append|newline - Appends a new line to the file.
808: # replace|key|newline - Replaces the line with key value 'key'
809: # delete|key - Deletes the line with key value 'key'.
810: # $editor - A config file editor object that contains the
811: # file being edited.
812: #
813: sub ApplyEdit {
1.192 foxr 814:
815: my ($directive, $editor) = @_;
1.169 foxr 816:
817: # Break the directive down into its command and its parameters
818: # (at most two at this point. The meaning of the parameters, if in fact
819: # they exist depends on the command).
820:
821: my ($command, $p1, $p2) = split(/\|/, $directive);
822:
823: if($command eq "append") {
824: $editor->Append($p1); # p1 - key p2 null.
825: } elsif ($command eq "replace") {
826: $editor->ReplaceLine($p1, $p2); # p1 - key p2 = newline.
827: } elsif ($command eq "delete") {
828: $editor->DeleteLine($p1); # p1 - key p2 null.
829: } else { # Should not get here!!!
830: die "Invalid command given to ApplyEdit $command"
831: }
832: }
833: #
834: # AdjustOurHost:
835: # Adjusts a host file stored in a configuration file editor object
836: # for the true IP address of this host. This is necessary for hosts
837: # that live behind a firewall.
838: # Those hosts have a publicly distributed IP of the firewall, but
839: # internally must use their actual IP. We assume that a given
840: # host only has a single IP interface for now.
841: # Formal Parameters:
842: # editor - The configuration file editor to adjust. This
843: # editor is assumed to contain a hosts.tab file.
844: # Strategy:
845: # - Figure out our hostname.
846: # - Lookup the entry for this host.
847: # - Modify the line to contain our IP
848: # - Do a replace for this host.
849: sub AdjustOurHost {
850: my $editor = shift;
851:
852: # figure out who I am.
853:
854: my $myHostName = $perlvar{'lonHostID'}; # LonCAPA hostname.
855:
856: # Get my host file entry.
857:
858: my $ConfigLine = $editor->Find($myHostName);
859: if(! (defined $ConfigLine)) {
860: die "AdjustOurHost - no entry for me in hosts file $myHostName";
861: }
862: # figure out my IP:
863: # Use the config line to get my hostname.
864: # Use gethostbyname to translate that into an IP address.
865: #
866: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);
867: my $BinaryIp = gethostbyname($name);
868: my $ip = inet_ntoa($ip);
869: #
870: # Reassemble the config line from the elements in the list.
871: # Note that if the loncnew items were not present before, they will
872: # be now even if they would be empty
873: #
874: my $newConfigLine = $id;
875: foreach my $item ($domain, $role, $name, $ip, $maxcon, $idleto, $mincon) {
876: $newConfigLine .= ":".$item;
877: }
878: # Replace the line:
879:
880: $editor->ReplaceLine($id, $newConfigLine);
881:
882: }
883: #
884: # ReplaceConfigFile:
885: # Replaces a configuration file with the contents of a
886: # configuration file editor object.
887: # This is done by:
888: # - Copying the target file to <filename>.old
889: # - Writing the new file to <filename>.tmp
890: # - Moving <filename.tmp> -> <filename>
891: # This laborious process ensures that the system is never without
892: # a configuration file that's at least valid (even if the contents
893: # may be dated).
894: # Parameters:
895: # filename - Name of the file to modify... this is a full path.
896: # editor - Editor containing the file.
897: #
898: sub ReplaceConfigFile {
1.192 foxr 899:
900: my ($filename, $editor) = @_;
1.168 foxr 901:
1.169 foxr 902: CopyFile ($filename, $filename.".old");
903:
904: my $contents = $editor->Get(); # Get the contents of the file.
905:
906: InstallFile($filename, $contents);
907: }
1.168 foxr 908: #
909: #
910: # Called to edit a configuration table file
1.167 foxr 911: # Parameters:
912: # request - The entire command/request sent by lonc or lonManage
913: # Return:
914: # The reply to send to the client.
1.168 foxr 915: #
1.167 foxr 916: sub EditFile {
917: my $request = shift;
918:
919: # Split the command into it's pieces: edit:filetype:script
920:
1.168 foxr 921: my ($request, $filetype, $script) = split(/:/, $request,3); # : in script
1.167 foxr 922:
923: # Check the pre-coditions for success:
924:
925: if($request != "edit") { # Something is amiss afoot alack.
926: return "error:edit request detected, but request != 'edit'\n";
927: }
928: if( ($filetype ne "hosts") &&
929: ($filetype ne "domain")) {
930: return "error:edit requested with invalid file specifier: $filetype \n";
931: }
932:
933: # Split the edit script and check it's validity.
1.168 foxr 934:
935: my @scriptlines = split(/\n/, $script); # one line per element.
936: my $linecount = scalar(@scriptlines);
937: for(my $i = 0; $i < $linecount; $i++) {
938: chomp($scriptlines[$i]);
939: if(!isValidEditCommand($scriptlines[$i])) {
940: return "error:edit with bad script line: '$scriptlines[$i]' \n";
941: }
942: }
1.145 foxr 943:
1.167 foxr 944: # Execute the edit operation.
1.169 foxr 945: # - Create a config file editor for the appropriate file and
946: # - execute each command in the script:
947: #
948: my $configfile = ConfigFileFromSelector($filetype);
949: if (!(defined $configfile)) {
950: return "refused\n";
951: }
952: my $editor = ConfigFileEdit->new($configfile);
1.167 foxr 953:
1.169 foxr 954: for (my $i = 0; $i < $linecount; $i++) {
955: ApplyEdit($scriptlines[$i], $editor);
956: }
957: # If the file is the host file, ensure that our host is
958: # adjusted to have our ip:
959: #
960: if($filetype eq "host") {
961: AdjustOurHost($editor);
962: }
963: # Finally replace the current file with our file.
964: #
965: ReplaceConfigFile($configfile, $editor);
1.167 foxr 966:
967: return "ok\n";
968: }
1.207 foxr 969:
970: #---------------------------------------------------------------
971: #
972: # Manipulation of hash based databases (factoring out common code
973: # for later use as we refactor.
974: #
975: # Ties a domain level resource file to a hash.
976: # If requested a history entry is created in the associated hist file.
977: #
978: # Parameters:
979: # domain - Name of the domain in which the resource file lives.
980: # namespace - Name of the hash within that domain.
981: # how - How to tie the hash (e.g. GDBM_WRCREAT()).
982: # loghead - Optional parameter, if present a log entry is created
983: # in the associated history file and this is the first part
984: # of that entry.
985: # logtail - Goes along with loghead, The actual logentry is of the
986: # form $loghead:<timestamp>:logtail.
987: # Returns:
988: # Reference to a hash bound to the db file or alternatively undef
989: # if the tie failed.
990: #
1.209 albertel 991: sub tie_domain_hash {
1.210 albertel 992: my ($domain,$namespace,$how,$loghead,$logtail) = @_;
1.207 foxr 993:
994: # Filter out any whitespace in the domain name:
995:
996: $domain =~ s/\W//g;
997:
998: # We have enough to go on to tie the hash:
999:
1000: my $user_top_dir = $perlvar{'lonUsersDir'};
1001: my $domain_dir = $user_top_dir."/$domain";
1002: my $resource_file = $domain_dir."/$namespace.db";
1003: my %hash;
1004: if(tie(%hash, 'GDBM_File', $resource_file, $how, 0640)) {
1.211 albertel 1005: if (defined($loghead)) { # Need to log the operation.
1.210 albertel 1006: my $logFh = IO::File->new(">>$domain_dir/$namespace.hist");
1.207 foxr 1007: if($logFh) {
1008: my $timestamp = time;
1009: print $logFh "$loghead:$timestamp:$logtail\n";
1010: }
1.210 albertel 1011: $logFh->close;
1.207 foxr 1012: }
1013: return \%hash; # Return the tied hash.
1.210 albertel 1014: } else {
1.207 foxr 1015: return undef; # Tie failed.
1016: }
1017: }
1018:
1019: #
1020: # Ties a user's resource file to a hash.
1021: # If necessary, an appropriate history
1022: # log file entry is made as well.
1023: # This sub factors out common code from the subs that manipulate
1024: # the various gdbm files that keep keyword value pairs.
1025: # Parameters:
1026: # domain - Name of the domain the user is in.
1027: # user - Name of the 'current user'.
1028: # namespace - Namespace representing the file to tie.
1029: # how - What the tie is done to (e.g. GDBM_WRCREAT().
1030: # loghead - Optional first part of log entry if there may be a
1031: # history file.
1032: # what - Optional tail of log entry if there may be a history
1033: # file.
1034: # Returns:
1035: # hash to which the database is tied. It's up to the caller to untie.
1036: # undef if the has could not be tied.
1037: #
1.210 albertel 1038: sub tie_user_hash {
1039: my ($domain,$user,$namespace,$how,$loghead,$what) = @_;
1.207 foxr 1040:
1041: $namespace=~s/\//\_/g; # / -> _
1042: $namespace=~s/\W//g; # whitespace eliminated.
1043: my $proname = propath($domain, $user);
1044:
1045: # Tie the database.
1046:
1047: my %hash;
1048: if(tie(%hash, 'GDBM_File', "$proname/$namespace.db",
1049: $how, 0640)) {
1.209 albertel 1050: # If this is a namespace for which a history is kept,
1051: # make the history log entry:
1.252 albertel 1052: if (($namespace !~/^nohist\_/) && (defined($loghead))) {
1.209 albertel 1053: my $args = scalar @_;
1054: Debug(" Opening history: $namespace $args");
1055: my $hfh = IO::File->new(">>$proname/$namespace.hist");
1056: if($hfh) {
1057: my $now = time;
1058: print $hfh "$loghead:$now:$what\n";
1059: }
1.210 albertel 1060: $hfh->close;
1.209 albertel 1061: }
1.207 foxr 1062: return \%hash;
1.209 albertel 1063: } else {
1.207 foxr 1064: return undef;
1065: }
1066:
1067: }
1.214 foxr 1068:
1.255 foxr 1069: # read_profile
1070: #
1071: # Returns a set of specific entries from a user's profile file.
1072: # this is a utility function that is used by both get_profile_entry and
1073: # get_profile_entry_encrypted.
1074: #
1075: # Parameters:
1076: # udom - Domain in which the user exists.
1077: # uname - User's account name (loncapa account)
1078: # namespace - The profile namespace to open.
1079: # what - A set of & separated queries.
1080: # Returns:
1081: # If all ok: - The string that needs to be shipped back to the user.
1082: # If failure - A string that starts with error: followed by the failure
1083: # reason.. note that this probabyl gets shipped back to the
1084: # user as well.
1085: #
1086: sub read_profile {
1087: my ($udom, $uname, $namespace, $what) = @_;
1088:
1089: my $hashref = &tie_user_hash($udom, $uname, $namespace,
1090: &GDBM_READER());
1091: if ($hashref) {
1092: my @queries=split(/\&/,$what);
1093: my $qresult='';
1094:
1095: for (my $i=0;$i<=$#queries;$i++) {
1096: $qresult.="$hashref->{$queries[$i]}&"; # Presumably failure gives empty string.
1097: }
1098: $qresult=~s/\&$//; # Remove trailing & from last lookup.
1099: if (untie %$hashref) {
1100: return $qresult;
1101: } else {
1102: return "error: ".($!+0)." untie (GDBM) Failed";
1103: }
1104: } else {
1105: if ($!+0 == 2) {
1106: return "error:No such file or GDBM reported bad block error";
1107: } else {
1108: return "error: ".($!+0)." tie (GDBM) Failed";
1109: }
1110: }
1111:
1112: }
1.214 foxr 1113: #--------------------- Request Handlers --------------------------------------------
1114: #
1.215 foxr 1115: # By convention each request handler registers itself prior to the sub
1116: # declaration:
1.214 foxr 1117: #
1118:
1.216 foxr 1119: #++
1120: #
1.214 foxr 1121: # Handles ping requests.
1122: # Parameters:
1123: # $cmd - the actual keyword that invoked us.
1124: # $tail - the tail of the request that invoked us.
1125: # $replyfd- File descriptor connected to the client
1126: # Implicit Inputs:
1127: # $currenthostid - Global variable that carries the name of the host we are
1128: # known as.
1129: # Returns:
1130: # 1 - Ok to continue processing.
1131: # 0 - Program should exit.
1132: # Side effects:
1133: # Reply information is sent to the client.
1134: sub ping_handler {
1135: my ($cmd, $tail, $client) = @_;
1136: Debug("$cmd $tail $client .. $currenthostid:");
1137:
1138: Reply( $client,"$currenthostid\n","$cmd:$tail");
1139:
1140: return 1;
1141: }
1142: ®ister_handler("ping", \&ping_handler, 0, 1, 1); # Ping unencoded, client or manager.
1143:
1.216 foxr 1144: #++
1.215 foxr 1145: #
1146: # Handles pong requests. Pong replies with our current host id, and
1147: # the results of a ping sent to us via our lonc.
1148: #
1149: # Parameters:
1150: # $cmd - the actual keyword that invoked us.
1151: # $tail - the tail of the request that invoked us.
1152: # $replyfd- File descriptor connected to the client
1153: # Implicit Inputs:
1154: # $currenthostid - Global variable that carries the name of the host we are
1155: # connected to.
1156: # Returns:
1157: # 1 - Ok to continue processing.
1158: # 0 - Program should exit.
1159: # Side effects:
1160: # Reply information is sent to the client.
1161: sub pong_handler {
1162: my ($cmd, $tail, $replyfd) = @_;
1163:
1164: my $reply=&reply("ping",$clientname);
1165: &Reply( $replyfd, "$currenthostid:$reply\n", "$cmd:$tail");
1166: return 1;
1167: }
1168: ®ister_handler("pong", \&pong_handler, 0, 1, 1); # Pong unencoded, client or manager
1169:
1.216 foxr 1170: #++
1171: # Called to establish an encrypted session key with the remote client.
1172: # Note that with secure lond, in most cases this function is never
1173: # invoked. Instead, the secure session key is established either
1174: # via a local file that's locked down tight and only lives for a short
1175: # time, or via an ssl tunnel...and is generated from a bunch-o-random
1176: # bits from /dev/urandom, rather than the predictable pattern used by
1177: # by this sub. This sub is only used in the old-style insecure
1178: # key negotiation.
1179: # Parameters:
1180: # $cmd - the actual keyword that invoked us.
1181: # $tail - the tail of the request that invoked us.
1182: # $replyfd- File descriptor connected to the client
1183: # Implicit Inputs:
1184: # $currenthostid - Global variable that carries the name of the host
1185: # known as.
1186: # $clientname - Global variable that carries the name of the hsot we're connected to.
1187: # Returns:
1188: # 1 - Ok to continue processing.
1189: # 0 - Program should exit.
1190: # Implicit Outputs:
1191: # Reply information is sent to the client.
1192: # $cipher is set with a reference to a new IDEA encryption object.
1193: #
1194: sub establish_key_handler {
1195: my ($cmd, $tail, $replyfd) = @_;
1196:
1197: my $buildkey=time.$$.int(rand 100000);
1198: $buildkey=~tr/1-6/A-F/;
1199: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
1200: my $key=$currenthostid.$clientname;
1201: $key=~tr/a-z/A-Z/;
1202: $key=~tr/G-P/0-9/;
1203: $key=~tr/Q-Z/0-9/;
1204: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
1205: $key=substr($key,0,32);
1206: my $cipherkey=pack("H32",$key);
1207: $cipher=new IDEA $cipherkey;
1208: &Reply($replyfd, "$buildkey\n", "$cmd:$tail");
1209:
1210: return 1;
1211:
1212: }
1213: ®ister_handler("ekey", \&establish_key_handler, 0, 1,1);
1214:
1.217 foxr 1215: # Handler for the load command. Returns the current system load average
1216: # to the requestor.
1217: #
1218: # Parameters:
1219: # $cmd - the actual keyword that invoked us.
1220: # $tail - the tail of the request that invoked us.
1221: # $replyfd- File descriptor connected to the client
1222: # Implicit Inputs:
1223: # $currenthostid - Global variable that carries the name of the host
1224: # known as.
1225: # $clientname - Global variable that carries the name of the hsot we're connected to.
1226: # Returns:
1227: # 1 - Ok to continue processing.
1228: # 0 - Program should exit.
1229: # Side effects:
1230: # Reply information is sent to the client.
1231: sub load_handler {
1232: my ($cmd, $tail, $replyfd) = @_;
1233:
1234: # Get the load average from /proc/loadavg and calculate it as a percentage of
1235: # the allowed load limit as set by the perl global variable lonLoadLim
1236:
1237: my $loadavg;
1238: my $loadfile=IO::File->new('/proc/loadavg');
1239:
1240: $loadavg=<$loadfile>;
1241: $loadavg =~ s/\s.*//g; # Extract the first field only.
1242:
1243: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1244:
1245: &Reply( $replyfd, "$loadpercent\n", "$cmd:$tail");
1246:
1247: return 1;
1248: }
1.263 albertel 1249: ®ister_handler("load", \&load_handler, 0, 1, 0);
1.217 foxr 1250:
1251: #
1252: # Process the userload request. This sub returns to the client the current
1253: # user load average. It can be invoked either by clients or managers.
1254: #
1255: # Parameters:
1256: # $cmd - the actual keyword that invoked us.
1257: # $tail - the tail of the request that invoked us.
1258: # $replyfd- File descriptor connected to the client
1259: # Implicit Inputs:
1260: # $currenthostid - Global variable that carries the name of the host
1261: # known as.
1262: # $clientname - Global variable that carries the name of the hsot we're connected to.
1263: # Returns:
1264: # 1 - Ok to continue processing.
1265: # 0 - Program should exit
1266: # Implicit inputs:
1267: # whatever the userload() function requires.
1268: # Implicit outputs:
1269: # the reply is written to the client.
1270: #
1271: sub user_load_handler {
1272: my ($cmd, $tail, $replyfd) = @_;
1273:
1274: my $userloadpercent=&userload();
1275: &Reply($replyfd, "$userloadpercent\n", "$cmd:$tail");
1276:
1277: return 1;
1278: }
1.263 albertel 1279: ®ister_handler("userload", \&user_load_handler, 0, 1, 0);
1.217 foxr 1280:
1.218 foxr 1281: # Process a request for the authorization type of a user:
1282: # (userauth).
1283: #
1284: # Parameters:
1285: # $cmd - the actual keyword that invoked us.
1286: # $tail - the tail of the request that invoked us.
1287: # $replyfd- File descriptor connected to the client
1288: # Returns:
1289: # 1 - Ok to continue processing.
1290: # 0 - Program should exit
1291: # Implicit outputs:
1292: # The user authorization type is written to the client.
1293: #
1294: sub user_authorization_type {
1295: my ($cmd, $tail, $replyfd) = @_;
1296:
1297: my $userinput = "$cmd:$tail";
1298:
1299: # Pull the domain and username out of the command tail.
1.222 foxr 1300: # and call get_auth_type to determine the authentication type.
1.218 foxr 1301:
1302: my ($udom,$uname)=split(/:/,$tail);
1.222 foxr 1303: my $result = &get_auth_type($udom, $uname);
1.218 foxr 1304: if($result eq "nouser") {
1305: &Failure( $replyfd, "unknown_user\n", $userinput);
1306: } else {
1307: #
1.222 foxr 1308: # We only want to pass the second field from get_auth_type
1.218 foxr 1309: # for ^krb.. otherwise we'll be handing out the encrypted
1310: # password for internals e.g.
1311: #
1312: my ($type,$otherinfo) = split(/:/,$result);
1313: if($type =~ /^krb/) {
1314: $type = $result;
1.269 raeburn 1315: } else {
1316: $type .= ':';
1317: }
1318: &Reply( $replyfd, "$type\n", $userinput);
1.218 foxr 1319: }
1320:
1321: return 1;
1322: }
1323: ®ister_handler("currentauth", \&user_authorization_type, 1, 1, 0);
1324:
1325: # Process a request by a manager to push a hosts or domain table
1326: # to us. We pick apart the command and pass it on to the subs
1327: # that already exist to do this.
1328: #
1329: # Parameters:
1330: # $cmd - the actual keyword that invoked us.
1331: # $tail - the tail of the request that invoked us.
1332: # $client - File descriptor connected to the client
1333: # Returns:
1334: # 1 - Ok to continue processing.
1335: # 0 - Program should exit
1336: # Implicit Output:
1337: # a reply is written to the client.
1338: sub push_file_handler {
1339: my ($cmd, $tail, $client) = @_;
1340:
1341: my $userinput = "$cmd:$tail";
1342:
1343: # At this time we only know that the IP of our partner is a valid manager
1344: # the code below is a hook to do further authentication (e.g. to resolve
1345: # spoofing).
1346:
1347: my $cert = &GetCertificate($userinput);
1348: if(&ValidManager($cert)) {
1349:
1350: # Now presumably we have the bona fides of both the peer host and the
1351: # process making the request.
1352:
1353: my $reply = &PushFile($userinput);
1354: &Reply($client, "$reply\n", $userinput);
1355:
1356: } else {
1357: &Failure( $client, "refused\n", $userinput);
1358: }
1.219 foxr 1359: return 1;
1.218 foxr 1360: }
1361: ®ister_handler("pushfile", \&push_file_handler, 1, 0, 1);
1362:
1.243 banghart 1363: #
1364: # du - list the disk usuage of a directory recursively.
1365: #
1366: # note: stolen code from the ls file handler
1367: # under construction by Rick Banghart
1368: # .
1369: # Parameters:
1370: # $cmd - The command that dispatched us (du).
1371: # $ududir - The directory path to list... I'm not sure what this
1372: # is relative as things like ls:. return e.g.
1373: # no_such_dir.
1374: # $client - Socket open on the client.
1375: # Returns:
1376: # 1 - indicating that the daemon should not disconnect.
1377: # Side Effects:
1378: # The reply is written to $client.
1379: #
1380: sub du_handler {
1381: my ($cmd, $ududir, $client) = @_;
1.251 foxr 1382: my ($ududir) = split(/:/,$ududir); # Make 'telnet' testing easier.
1383: my $userinput = "$cmd:$ududir";
1384:
1.245 albertel 1385: if ($ududir=~/\.\./ || $ududir!~m|^/home/httpd/|) {
1386: &Failure($client,"refused\n","$cmd:$ududir");
1387: return 1;
1388: }
1.249 foxr 1389: # Since $ududir could have some nasties in it,
1390: # we will require that ududir is a valid
1391: # directory. Just in case someone tries to
1392: # slip us a line like .;(cd /home/httpd rm -rf*)
1393: # etc.
1394: #
1395: if (-d $ududir) {
1396: # And as Shakespeare would say to make
1.251 foxr 1397: # assurance double sure,
1398: # use execute_command to ensure that the command is not executed in
1399: # a shell that can screw us up.
1400:
1401: my $duout = execute_command("du -ks $ududir");
1.249 foxr 1402: $duout=~s/[^\d]//g; #preserve only the numbers
1403: &Reply($client,"$duout\n","$cmd:$ududir");
1404: } else {
1.251 foxr 1405:
1406: &Failure($client, "bad_directory:$ududir\n","$cmd:$ududir");
1407:
1.249 foxr 1408: }
1.243 banghart 1409: return 1;
1410: }
1411: ®ister_handler("du", \&du_handler, 0, 1, 0);
1.218 foxr 1412:
1.239 foxr 1413: #
1414: # ls - list the contents of a directory. For each file in the
1415: # selected directory the filename followed by the full output of
1416: # the stat function is returned. The returned info for each
1417: # file are separated by ':'. The stat fields are separated by &'s.
1418: # Parameters:
1419: # $cmd - The command that dispatched us (ls).
1420: # $ulsdir - The directory path to list... I'm not sure what this
1421: # is relative as things like ls:. return e.g.
1422: # no_such_dir.
1423: # $client - Socket open on the client.
1424: # Returns:
1425: # 1 - indicating that the daemon should not disconnect.
1426: # Side Effects:
1427: # The reply is written to $client.
1428: #
1429: sub ls_handler {
1430: my ($cmd, $ulsdir, $client) = @_;
1431:
1432: my $userinput = "$cmd:$ulsdir";
1433:
1434: my $obs;
1435: my $rights;
1436: my $ulsout='';
1437: my $ulsfn;
1438: if (-e $ulsdir) {
1439: if(-d $ulsdir) {
1440: if (opendir(LSDIR,$ulsdir)) {
1441: while ($ulsfn=readdir(LSDIR)) {
1442: undef $obs, $rights;
1443: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1444: #We do some obsolete checking here
1445: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1446: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1447: my @obsolete=<FILE>;
1448: foreach my $obsolete (@obsolete) {
1449: if($obsolete =~ m|(<obsolete>)(on)|) { $obs = 1; }
1450: if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
1451: }
1452: }
1453: $ulsout.=$ulsfn.'&'.join('&',@ulsstats);
1454: if($obs eq '1') { $ulsout.="&1"; }
1455: else { $ulsout.="&0"; }
1456: if($rights eq '1') { $ulsout.="&1:"; }
1457: else { $ulsout.="&0:"; }
1458: }
1459: closedir(LSDIR);
1460: }
1461: } else {
1462: my @ulsstats=stat($ulsdir);
1463: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1464: }
1465: } else {
1466: $ulsout='no_such_dir';
1467: }
1468: if ($ulsout eq '') { $ulsout='empty'; }
1.249 foxr 1469: &Reply($client, "$ulsout\n", $userinput); # This supports debug logging.
1.239 foxr 1470:
1471: return 1;
1472:
1473: }
1474: ®ister_handler("ls", \&ls_handler, 0, 1, 0);
1475:
1.218 foxr 1476: # Process a reinit request. Reinit requests that either
1477: # lonc or lond be reinitialized so that an updated
1478: # host.tab or domain.tab can be processed.
1479: #
1480: # Parameters:
1481: # $cmd - the actual keyword that invoked us.
1482: # $tail - the tail of the request that invoked us.
1483: # $client - File descriptor connected to the client
1484: # Returns:
1485: # 1 - Ok to continue processing.
1486: # 0 - Program should exit
1487: # Implicit output:
1488: # a reply is sent to the client.
1489: #
1490: sub reinit_process_handler {
1491: my ($cmd, $tail, $client) = @_;
1492:
1493: my $userinput = "$cmd:$tail";
1494:
1495: my $cert = &GetCertificate($userinput);
1496: if(&ValidManager($cert)) {
1497: chomp($userinput);
1498: my $reply = &ReinitProcess($userinput);
1499: &Reply( $client, "$reply\n", $userinput);
1500: } else {
1501: &Failure( $client, "refused\n", $userinput);
1502: }
1503: return 1;
1504: }
1505: ®ister_handler("reinit", \&reinit_process_handler, 1, 0, 1);
1506:
1507: # Process the editing script for a table edit operation.
1508: # the editing operation must be encrypted and requested by
1509: # a manager host.
1510: #
1511: # Parameters:
1512: # $cmd - the actual keyword that invoked us.
1513: # $tail - the tail of the request that invoked us.
1514: # $client - File descriptor connected to the client
1515: # Returns:
1516: # 1 - Ok to continue processing.
1517: # 0 - Program should exit
1518: # Implicit output:
1519: # a reply is sent to the client.
1520: #
1521: sub edit_table_handler {
1522: my ($command, $tail, $client) = @_;
1523:
1524: my $userinput = "$command:$tail";
1525:
1526: my $cert = &GetCertificate($userinput);
1527: if(&ValidManager($cert)) {
1528: my($filetype, $script) = split(/:/, $tail);
1529: if (($filetype eq "hosts") ||
1530: ($filetype eq "domain")) {
1531: if($script ne "") {
1532: &Reply($client, # BUGBUG - EditFile
1533: &EditFile($userinput), # could fail.
1534: $userinput);
1535: } else {
1536: &Failure($client,"refused\n",$userinput);
1537: }
1538: } else {
1539: &Failure($client,"refused\n",$userinput);
1540: }
1541: } else {
1542: &Failure($client,"refused\n",$userinput);
1543: }
1544: return 1;
1545: }
1.263 albertel 1546: ®ister_handler("edit", \&edit_table_handler, 1, 0, 1);
1.218 foxr 1547:
1.220 foxr 1548: #
1549: # Authenticate a user against the LonCAPA authentication
1550: # database. Note that there are several authentication
1551: # possibilities:
1552: # - unix - The user can be authenticated against the unix
1553: # password file.
1554: # - internal - The user can be authenticated against a purely
1555: # internal per user password file.
1556: # - kerberos - The user can be authenticated against either a kerb4 or kerb5
1557: # ticket granting authority.
1558: # - user - The person tailoring LonCAPA can supply a user authentication
1559: # mechanism that is per system.
1560: #
1561: # Parameters:
1562: # $cmd - The command that got us here.
1563: # $tail - Tail of the command (remaining parameters).
1564: # $client - File descriptor connected to client.
1565: # Returns
1566: # 0 - Requested to exit, caller should shut down.
1567: # 1 - Continue processing.
1568: # Implicit inputs:
1569: # The authentication systems describe above have their own forms of implicit
1570: # input into the authentication process that are described above.
1571: #
1572: sub authenticate_handler {
1573: my ($cmd, $tail, $client) = @_;
1574:
1575:
1576: # Regenerate the full input line
1577:
1578: my $userinput = $cmd.":".$tail;
1579:
1580: # udom - User's domain.
1581: # uname - Username.
1582: # upass - User's password.
1583:
1584: my ($udom,$uname,$upass)=split(/:/,$tail);
1585: &Debug(" Authenticate domain = $udom, user = $uname, password = $upass");
1586: chomp($upass);
1587: $upass=&unescape($upass);
1588:
1589: my $pwdcorrect = &validate_user($udom, $uname, $upass);
1590: if($pwdcorrect) {
1591: &Reply( $client, "authorized\n", $userinput);
1592: #
1593: # Bad credentials: Failed to authorize
1594: #
1595: } else {
1596: &Failure( $client, "non_authorized\n", $userinput);
1597: }
1598:
1599: return 1;
1600: }
1.263 albertel 1601: ®ister_handler("auth", \&authenticate_handler, 1, 1, 0);
1.214 foxr 1602:
1.222 foxr 1603: #
1604: # Change a user's password. Note that this function is complicated by
1605: # the fact that a user may be authenticated in more than one way:
1606: # At present, we are not able to change the password for all types of
1607: # authentication methods. Only for:
1608: # unix - unix password or shadow passoword style authentication.
1609: # local - Locally written authentication mechanism.
1610: # For now, kerb4 and kerb5 password changes are not supported and result
1611: # in an error.
1612: # FUTURE WORK:
1613: # Support kerberos passwd changes?
1614: # Parameters:
1615: # $cmd - The command that got us here.
1616: # $tail - Tail of the command (remaining parameters).
1617: # $client - File descriptor connected to client.
1618: # Returns
1619: # 0 - Requested to exit, caller should shut down.
1620: # 1 - Continue processing.
1621: # Implicit inputs:
1622: # The authentication systems describe above have their own forms of implicit
1623: # input into the authentication process that are described above.
1624: sub change_password_handler {
1625: my ($cmd, $tail, $client) = @_;
1626:
1627: my $userinput = $cmd.":".$tail; # Reconstruct client's string.
1628:
1629: #
1630: # udom - user's domain.
1631: # uname - Username.
1632: # upass - Current password.
1633: # npass - New password.
1634:
1635: my ($udom,$uname,$upass,$npass)=split(/:/,$tail);
1636:
1637: $upass=&unescape($upass);
1638: $npass=&unescape($npass);
1639: &Debug("Trying to change password for $uname");
1640:
1641: # First require that the user can be authenticated with their
1642: # old password:
1643:
1644: my $validated = &validate_user($udom, $uname, $upass);
1645: if($validated) {
1646: my $realpasswd = &get_auth_type($udom, $uname); # Defined since authd.
1647:
1648: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1649: if ($howpwd eq 'internal') {
1650: &Debug("internal auth");
1651: my $salt=time;
1652: $salt=substr($salt,6,2);
1653: my $ncpass=crypt($npass,$salt);
1654: if(&rewrite_password_file($udom, $uname, "internal:$ncpass")) {
1655: &logthis("Result of password change for "
1656: ."$uname: pwchange_success");
1657: &Reply($client, "ok\n", $userinput);
1658: } else {
1659: &logthis("Unable to open $uname passwd "
1660: ."to change password");
1661: &Failure( $client, "non_authorized\n",$userinput);
1662: }
1663: } elsif ($howpwd eq 'unix') {
1664: # Unix means we have to access /etc/password
1665: &Debug("auth is unix");
1666: my $execdir=$perlvar{'lonDaemons'};
1667: &Debug("Opening lcpasswd pipeline");
1668: my $pf = IO::File->new("|$execdir/lcpasswd > "
1669: ."$perlvar{'lonDaemons'}"
1670: ."/logs/lcpasswd.log");
1671: print $pf "$uname\n$npass\n$npass\n";
1672: close $pf;
1673: my $err = $?;
1674: my $result = ($err>0 ? 'pwchange_failure' : 'ok');
1675: &logthis("Result of password change for $uname: ".
1676: &lcpasswdstrerror($?));
1677: &Reply($client, "$result\n", $userinput);
1678: } else {
1679: # this just means that the current password mode is not
1680: # one we know how to change (e.g the kerberos auth modes or
1681: # locally written auth handler).
1682: #
1683: &Failure( $client, "auth_mode_error\n", $userinput);
1684: }
1685:
1.224 foxr 1686: } else {
1.222 foxr 1687: &Failure( $client, "non_authorized\n", $userinput);
1688: }
1689:
1690: return 1;
1691: }
1.263 albertel 1692: ®ister_handler("passwd", \&change_password_handler, 1, 1, 0);
1.222 foxr 1693:
1.225 foxr 1694: #
1695: # Create a new user. User in this case means a lon-capa user.
1696: # The user must either already exist in some authentication realm
1697: # like kerberos or the /etc/passwd. If not, a user completely local to
1698: # this loncapa system is created.
1699: #
1700: # Parameters:
1701: # $cmd - The command that got us here.
1702: # $tail - Tail of the command (remaining parameters).
1703: # $client - File descriptor connected to client.
1704: # Returns
1705: # 0 - Requested to exit, caller should shut down.
1706: # 1 - Continue processing.
1707: # Implicit inputs:
1708: # The authentication systems describe above have their own forms of implicit
1709: # input into the authentication process that are described above.
1710: sub add_user_handler {
1711:
1712: my ($cmd, $tail, $client) = @_;
1713:
1714:
1715: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
1716: my $userinput = $cmd.":".$tail; # Reconstruct the full request line.
1717:
1718: &Debug("cmd =".$cmd." $udom =".$udom." uname=".$uname);
1719:
1720:
1721: if($udom eq $currentdomainid) { # Reject new users for other domains...
1722:
1723: my $oldumask=umask(0077);
1724: chomp($npass);
1725: $npass=&unescape($npass);
1726: my $passfilename = &password_path($udom, $uname);
1727: &Debug("Password file created will be:".$passfilename);
1728: if (-e $passfilename) {
1729: &Failure( $client, "already_exists\n", $userinput);
1730: } else {
1731: my $fperror='';
1.264 albertel 1732: if (!&mkpath($passfilename)) {
1733: $fperror="error: ".($!+0)." mkdir failed while attempting "
1734: ."makeuser";
1.225 foxr 1735: }
1736: unless ($fperror) {
1737: my $result=&make_passwd_file($uname, $umode,$npass, $passfilename);
1738: &Reply($client, $result, $userinput); #BUGBUG - could be fail
1739: } else {
1740: &Failure($client, "$fperror\n", $userinput);
1741: }
1742: }
1743: umask($oldumask);
1744: } else {
1745: &Failure($client, "not_right_domain\n",
1746: $userinput); # Even if we are multihomed.
1747:
1748: }
1749: return 1;
1750:
1751: }
1752: ®ister_handler("makeuser", \&add_user_handler, 1, 1, 0);
1753:
1754: #
1755: # Change the authentication method of a user. Note that this may
1756: # also implicitly change the user's password if, for example, the user is
1757: # joining an existing authentication realm. Known authentication realms at
1758: # this time are:
1759: # internal - Purely internal password file (only loncapa knows this user)
1760: # local - Institutionally written authentication module.
1761: # unix - Unix user (/etc/passwd with or without /etc/shadow).
1762: # kerb4 - kerberos version 4
1763: # kerb5 - kerberos version 5
1764: #
1765: # Parameters:
1766: # $cmd - The command that got us here.
1767: # $tail - Tail of the command (remaining parameters).
1768: # $client - File descriptor connected to client.
1769: # Returns
1770: # 0 - Requested to exit, caller should shut down.
1771: # 1 - Continue processing.
1772: # Implicit inputs:
1773: # The authentication systems describe above have their own forms of implicit
1774: # input into the authentication process that are described above.
1775: #
1776: sub change_authentication_handler {
1777:
1778: my ($cmd, $tail, $client) = @_;
1779:
1780: my $userinput = "$cmd:$tail"; # Reconstruct user input.
1781:
1782: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
1783: &Debug("cmd = ".$cmd." domain= ".$udom."uname =".$uname." umode= ".$umode);
1784: if ($udom ne $currentdomainid) {
1785: &Failure( $client, "not_right_domain\n", $client);
1786: } else {
1787:
1788: chomp($npass);
1789:
1790: $npass=&unescape($npass);
1.261 foxr 1791: my $oldauth = &get_auth_type($udom, $uname); # Get old auth info.
1.225 foxr 1792: my $passfilename = &password_path($udom, $uname);
1793: if ($passfilename) { # Not allowed to create a new user!!
1794: my $result=&make_passwd_file($uname, $umode,$npass,$passfilename);
1.261 foxr 1795: #
1796: # If the current auth mode is internal, and the old auth mode was
1797: # unix, or krb*, and the user is an author for this domain,
1798: # re-run manage_permissions for that role in order to be able
1799: # to take ownership of the construction space back to www:www
1800: #
1801:
1802: if( ($oldauth =~ /^unix/) && ($umode eq "internal")) { # unix -> internal
1803: if(&is_author($udom, $uname)) {
1804: &Debug(" Need to manage author permissions...");
1805: &manage_permissions("/$udom/_au", $udom, $uname, "internal:");
1806: }
1807: }
1808:
1809:
1.225 foxr 1810: &Reply($client, $result, $userinput);
1811: } else {
1.251 foxr 1812: &Failure($client, "non_authorized\n", $userinput); # Fail the user now.
1.225 foxr 1813: }
1814: }
1815: return 1;
1816: }
1817: ®ister_handler("changeuserauth", \&change_authentication_handler, 1,1, 0);
1818:
1819: #
1820: # Determines if this is the home server for a user. The home server
1821: # for a user will have his/her lon-capa passwd file. Therefore all we need
1822: # to do is determine if this file exists.
1823: #
1824: # Parameters:
1825: # $cmd - The command that got us here.
1826: # $tail - Tail of the command (remaining parameters).
1827: # $client - File descriptor connected to client.
1828: # Returns
1829: # 0 - Requested to exit, caller should shut down.
1830: # 1 - Continue processing.
1831: # Implicit inputs:
1832: # The authentication systems describe above have their own forms of implicit
1833: # input into the authentication process that are described above.
1834: #
1835: sub is_home_handler {
1836: my ($cmd, $tail, $client) = @_;
1837:
1838: my $userinput = "$cmd:$tail";
1839:
1840: my ($udom,$uname)=split(/:/,$tail);
1841: chomp($uname);
1842: my $passfile = &password_filename($udom, $uname);
1843: if($passfile) {
1844: &Reply( $client, "found\n", $userinput);
1845: } else {
1846: &Failure($client, "not_found\n", $userinput);
1847: }
1848: return 1;
1849: }
1850: ®ister_handler("home", \&is_home_handler, 0,1,0);
1851:
1852: #
1853: # Process an update request for a resource?? I think what's going on here is
1854: # that a resource has been modified that we hold a subscription to.
1855: # If the resource is not local, then we must update, or at least invalidate our
1856: # cached copy of the resource.
1857: # FUTURE WORK:
1858: # I need to look at this logic carefully. My druthers would be to follow
1859: # typical caching logic, and simple invalidate the cache, drop any subscription
1860: # an let the next fetch start the ball rolling again... however that may
1861: # actually be more difficult than it looks given the complex web of
1862: # proxy servers.
1863: # Parameters:
1864: # $cmd - The command that got us here.
1865: # $tail - Tail of the command (remaining parameters).
1866: # $client - File descriptor connected to client.
1867: # Returns
1868: # 0 - Requested to exit, caller should shut down.
1869: # 1 - Continue processing.
1870: # Implicit inputs:
1871: # The authentication systems describe above have their own forms of implicit
1872: # input into the authentication process that are described above.
1873: #
1874: sub update_resource_handler {
1875:
1876: my ($cmd, $tail, $client) = @_;
1877:
1878: my $userinput = "$cmd:$tail";
1879:
1880: my $fname= $tail; # This allows interactive testing
1881:
1882:
1883: my $ownership=ishome($fname);
1884: if ($ownership eq 'not_owner') {
1885: if (-e $fname) {
1886: my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
1887: $atime,$mtime,$ctime,$blksize,$blocks)=stat($fname);
1888: my $now=time;
1889: my $since=$now-$atime;
1890: if ($since>$perlvar{'lonExpire'}) {
1891: my $reply=&reply("unsub:$fname","$clientname");
1892: unlink("$fname");
1893: } else {
1894: my $transname="$fname.in.transfer";
1895: my $remoteurl=&reply("sub:$fname","$clientname");
1896: my $response;
1897: alarm(120);
1898: {
1899: my $ua=new LWP::UserAgent;
1900: my $request=new HTTP::Request('GET',"$remoteurl");
1901: $response=$ua->request($request,$transname);
1902: }
1903: alarm(0);
1904: if ($response->is_error()) {
1905: unlink($transname);
1906: my $message=$response->status_line;
1907: &logthis("LWP GET: $message for $fname ($remoteurl)");
1908: } else {
1909: if ($remoteurl!~/\.meta$/) {
1910: alarm(120);
1911: {
1912: my $ua=new LWP::UserAgent;
1913: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1914: my $mresponse=$ua->request($mrequest,$fname.'.meta');
1915: if ($mresponse->is_error()) {
1916: unlink($fname.'.meta');
1917: }
1918: }
1919: alarm(0);
1920: }
1921: rename($transname,$fname);
1922: }
1923: }
1924: &Reply( $client, "ok\n", $userinput);
1925: } else {
1926: &Failure($client, "not_found\n", $userinput);
1927: }
1928: } else {
1929: &Failure($client, "rejected\n", $userinput);
1930: }
1931: return 1;
1932: }
1933: ®ister_handler("update", \&update_resource_handler, 0 ,1, 0);
1934:
1935: #
1.226 foxr 1936: # Fetch a user file from a remote server to the user's home directory
1937: # userfiles subdir.
1.225 foxr 1938: # Parameters:
1939: # $cmd - The command that got us here.
1940: # $tail - Tail of the command (remaining parameters).
1941: # $client - File descriptor connected to client.
1942: # Returns
1943: # 0 - Requested to exit, caller should shut down.
1944: # 1 - Continue processing.
1945: #
1946: sub fetch_user_file_handler {
1947:
1948: my ($cmd, $tail, $client) = @_;
1949:
1950: my $userinput = "$cmd:$tail";
1951: my $fname = $tail;
1.232 foxr 1952: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
1.225 foxr 1953: my $udir=&propath($udom,$uname).'/userfiles';
1954: unless (-e $udir) {
1955: mkdir($udir,0770);
1956: }
1.232 foxr 1957: Debug("fetch user file for $fname");
1.225 foxr 1958: if (-e $udir) {
1959: $ufile=~s/^[\.\~]+//;
1.232 foxr 1960:
1961: # IF necessary, create the path right down to the file.
1962: # Note that any regular files in the way of this path are
1963: # wiped out to deal with some earlier folly of mine.
1964:
1.267 raeburn 1965: if (!&mkpath($udir.'/'.$ufile)) {
1.264 albertel 1966: &Failure($client, "unable_to_create\n", $userinput);
1.232 foxr 1967: }
1968:
1.225 foxr 1969: my $destname=$udir.'/'.$ufile;
1970: my $transname=$udir.'/'.$ufile.'.in.transit';
1971: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
1972: my $response;
1.232 foxr 1973: Debug("Remote URL : $remoteurl Transfername $transname Destname: $destname");
1.225 foxr 1974: alarm(120);
1975: {
1976: my $ua=new LWP::UserAgent;
1977: my $request=new HTTP::Request('GET',"$remoteurl");
1978: $response=$ua->request($request,$transname);
1979: }
1980: alarm(0);
1981: if ($response->is_error()) {
1982: unlink($transname);
1983: my $message=$response->status_line;
1984: &logthis("LWP GET: $message for $fname ($remoteurl)");
1985: &Failure($client, "failed\n", $userinput);
1986: } else {
1.232 foxr 1987: Debug("Renaming $transname to $destname");
1.225 foxr 1988: if (!rename($transname,$destname)) {
1989: &logthis("Unable to move $transname to $destname");
1990: unlink($transname);
1991: &Failure($client, "failed\n", $userinput);
1992: } else {
1993: &Reply($client, "ok\n", $userinput);
1994: }
1995: }
1996: } else {
1997: &Failure($client, "not_home\n", $userinput);
1998: }
1999: return 1;
2000: }
2001: ®ister_handler("fetchuserfile", \&fetch_user_file_handler, 0, 1, 0);
2002:
1.226 foxr 2003: #
2004: # Remove a file from a user's home directory userfiles subdirectory.
2005: # Parameters:
2006: # cmd - the Lond request keyword that got us here.
2007: # tail - the part of the command past the keyword.
2008: # client- File descriptor connected with the client.
2009: #
2010: # Returns:
2011: # 1 - Continue processing.
2012: sub remove_user_file_handler {
2013: my ($cmd, $tail, $client) = @_;
2014:
2015: my ($fname) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2016:
2017: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
2018: if ($ufile =~m|/\.\./|) {
2019: # any files paths with /../ in them refuse
2020: # to deal with
2021: &Failure($client, "refused\n", "$cmd:$tail");
2022: } else {
2023: my $udir = &propath($udom,$uname);
2024: if (-e $udir) {
2025: my $file=$udir.'/userfiles/'.$ufile;
2026: if (-e $file) {
1.253 foxr 2027: #
2028: # If the file is a regular file unlink is fine...
2029: # However it's possible the client wants a dir.
2030: # removed, in which case rmdir is more approprate:
2031: #
1.240 banghart 2032: if (-f $file){
1.241 albertel 2033: unlink($file);
2034: } elsif(-d $file) {
2035: rmdir($file);
1.240 banghart 2036: }
1.226 foxr 2037: if (-e $file) {
1.253 foxr 2038: # File is still there after we deleted it ?!?
2039:
1.226 foxr 2040: &Failure($client, "failed\n", "$cmd:$tail");
2041: } else {
2042: &Reply($client, "ok\n", "$cmd:$tail");
2043: }
2044: } else {
2045: &Failure($client, "not_found\n", "$cmd:$tail");
2046: }
2047: } else {
2048: &Failure($client, "not_home\n", "$cmd:$tail");
2049: }
2050: }
2051: return 1;
2052: }
2053: ®ister_handler("removeuserfile", \&remove_user_file_handler, 0,1,0);
2054:
1.236 albertel 2055: #
2056: # make a directory in a user's home directory userfiles subdirectory.
2057: # Parameters:
2058: # cmd - the Lond request keyword that got us here.
2059: # tail - the part of the command past the keyword.
2060: # client- File descriptor connected with the client.
2061: #
2062: # Returns:
2063: # 1 - Continue processing.
2064: sub mkdir_user_file_handler {
2065: my ($cmd, $tail, $client) = @_;
2066:
2067: my ($dir) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2068: $dir=&unescape($dir);
2069: my ($udom,$uname,$ufile) = ($dir =~ m|^([^/]+)/([^/]+)/(.+)$|);
2070: if ($ufile =~m|/\.\./|) {
2071: # any files paths with /../ in them refuse
2072: # to deal with
2073: &Failure($client, "refused\n", "$cmd:$tail");
2074: } else {
2075: my $udir = &propath($udom,$uname);
2076: if (-e $udir) {
1.264 albertel 2077: my $newdir=$udir.'/userfiles/'.$ufile.'/';
2078: if (!&mkpath($newdir)) {
2079: &Failure($client, "failed\n", "$cmd:$tail");
1.236 albertel 2080: }
1.264 albertel 2081: &Reply($client, "ok\n", "$cmd:$tail");
1.236 albertel 2082: } else {
2083: &Failure($client, "not_home\n", "$cmd:$tail");
2084: }
2085: }
2086: return 1;
2087: }
2088: ®ister_handler("mkdiruserfile", \&mkdir_user_file_handler, 0,1,0);
2089:
1.237 albertel 2090: #
2091: # rename a file in a user's home directory userfiles subdirectory.
2092: # Parameters:
2093: # cmd - the Lond request keyword that got us here.
2094: # tail - the part of the command past the keyword.
2095: # client- File descriptor connected with the client.
2096: #
2097: # Returns:
2098: # 1 - Continue processing.
2099: sub rename_user_file_handler {
2100: my ($cmd, $tail, $client) = @_;
2101:
2102: my ($udom,$uname,$old,$new) = split(/:/, $tail);
2103: $old=&unescape($old);
2104: $new=&unescape($new);
2105: if ($new =~m|/\.\./| || $old =~m|/\.\./|) {
2106: # any files paths with /../ in them refuse to deal with
2107: &Failure($client, "refused\n", "$cmd:$tail");
2108: } else {
2109: my $udir = &propath($udom,$uname);
2110: if (-e $udir) {
2111: my $oldfile=$udir.'/userfiles/'.$old;
2112: my $newfile=$udir.'/userfiles/'.$new;
2113: if (-e $newfile) {
2114: &Failure($client, "exists\n", "$cmd:$tail");
2115: } elsif (! -e $oldfile) {
2116: &Failure($client, "not_found\n", "$cmd:$tail");
2117: } else {
2118: if (!rename($oldfile,$newfile)) {
2119: &Failure($client, "failed\n", "$cmd:$tail");
2120: } else {
2121: &Reply($client, "ok\n", "$cmd:$tail");
2122: }
2123: }
2124: } else {
2125: &Failure($client, "not_home\n", "$cmd:$tail");
2126: }
2127: }
2128: return 1;
2129: }
2130: ®ister_handler("renameuserfile", \&rename_user_file_handler, 0,1,0);
2131:
1.227 foxr 2132: #
1.263 albertel 2133: # Authenticate access to a user file by checking that the token the user's
2134: # passed also exists in their session file
1.227 foxr 2135: #
2136: # Parameters:
2137: # cmd - The request keyword that dispatched to tus.
2138: # tail - The tail of the request (colon separated parameters).
2139: # client - Filehandle open on the client.
2140: # Return:
2141: # 1.
2142: sub token_auth_user_file_handler {
2143: my ($cmd, $tail, $client) = @_;
2144:
2145: my ($fname, $session) = split(/:/, $tail);
2146:
2147: chomp($session);
1.251 foxr 2148: my $reply="non_auth\n";
1.227 foxr 2149: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
2150: $session.'.id')) {
2151: while (my $line=<ENVIN>) {
1.251 foxr 2152: if ($line=~ m|userfile\.\Q$fname\E\=|) { $reply="ok\n"; }
1.227 foxr 2153: }
2154: close(ENVIN);
1.251 foxr 2155: &Reply($client, $reply, "$cmd:$tail");
1.227 foxr 2156: } else {
2157: &Failure($client, "invalid_token\n", "$cmd:$tail");
2158: }
2159: return 1;
2160:
2161: }
2162: ®ister_handler("tokenauthuserfile", \&token_auth_user_file_handler, 0,1,0);
1.229 foxr 2163:
2164: #
2165: # Unsubscribe from a resource.
2166: #
2167: # Parameters:
2168: # $cmd - The command that got us here.
2169: # $tail - Tail of the command (remaining parameters).
2170: # $client - File descriptor connected to client.
2171: # Returns
2172: # 0 - Requested to exit, caller should shut down.
2173: # 1 - Continue processing.
2174: #
2175: sub unsubscribe_handler {
2176: my ($cmd, $tail, $client) = @_;
2177:
2178: my $userinput= "$cmd:$tail";
2179:
2180: my ($fname) = split(/:/,$tail); # Split in case there's extrs.
2181:
2182: &Debug("Unsubscribing $fname");
2183: if (-e $fname) {
2184: &Debug("Exists");
2185: &Reply($client, &unsub($fname,$clientip), $userinput);
2186: } else {
2187: &Failure($client, "not_found\n", $userinput);
2188: }
2189: return 1;
2190: }
2191: ®ister_handler("unsub", \&unsubscribe_handler, 0, 1, 0);
1.263 albertel 2192:
1.230 foxr 2193: # Subscribe to a resource
2194: #
2195: # Parameters:
2196: # $cmd - The command that got us here.
2197: # $tail - Tail of the command (remaining parameters).
2198: # $client - File descriptor connected to client.
2199: # Returns
2200: # 0 - Requested to exit, caller should shut down.
2201: # 1 - Continue processing.
2202: #
2203: sub subscribe_handler {
2204: my ($cmd, $tail, $client)= @_;
2205:
2206: my $userinput = "$cmd:$tail";
2207:
2208: &Reply( $client, &subscribe($userinput,$clientip), $userinput);
2209:
2210: return 1;
2211: }
2212: ®ister_handler("sub", \&subscribe_handler, 0, 1, 0);
2213:
2214: #
2215: # Determine the version of a resource (?) Or is it return
2216: # the top version of the resource? Not yet clear from the
2217: # code in currentversion.
2218: #
2219: # Parameters:
2220: # $cmd - The command that got us here.
2221: # $tail - Tail of the command (remaining parameters).
2222: # $client - File descriptor connected to client.
2223: # Returns
2224: # 0 - Requested to exit, caller should shut down.
2225: # 1 - Continue processing.
2226: #
2227: sub current_version_handler {
2228: my ($cmd, $tail, $client) = @_;
2229:
2230: my $userinput= "$cmd:$tail";
2231:
2232: my $fname = $tail;
2233: &Reply( $client, ¤tversion($fname)."\n", $userinput);
2234: return 1;
2235:
2236: }
2237: ®ister_handler("currentversion", \¤t_version_handler, 0, 1, 0);
2238:
2239: # Make an entry in a user's activity log.
2240: #
2241: # Parameters:
2242: # $cmd - The command that got us here.
2243: # $tail - Tail of the command (remaining parameters).
2244: # $client - File descriptor connected to client.
2245: # Returns
2246: # 0 - Requested to exit, caller should shut down.
2247: # 1 - Continue processing.
2248: #
2249: sub activity_log_handler {
2250: my ($cmd, $tail, $client) = @_;
2251:
2252:
2253: my $userinput= "$cmd:$tail";
2254:
2255: my ($udom,$uname,$what)=split(/:/,$tail);
2256: chomp($what);
2257: my $proname=&propath($udom,$uname);
2258: my $now=time;
2259: my $hfh;
2260: if ($hfh=IO::File->new(">>$proname/activity.log")) {
2261: print $hfh "$now:$clientname:$what\n";
2262: &Reply( $client, "ok\n", $userinput);
2263: } else {
2264: &Failure($client, "error: ".($!+0)." IO::File->new Failed "
2265: ."while attempting log\n",
2266: $userinput);
2267: }
2268:
2269: return 1;
2270: }
1.263 albertel 2271: ®ister_handler("log", \&activity_log_handler, 0, 1, 0);
1.230 foxr 2272:
2273: #
2274: # Put a namespace entry in a user profile hash.
2275: # My druthers would be for this to be an encrypted interaction too.
2276: # anything that might be an inadvertent covert channel about either
2277: # user authentication or user personal information....
2278: #
2279: # Parameters:
2280: # $cmd - The command that got us here.
2281: # $tail - Tail of the command (remaining parameters).
2282: # $client - File descriptor connected to client.
2283: # Returns
2284: # 0 - Requested to exit, caller should shut down.
2285: # 1 - Continue processing.
2286: #
2287: sub put_user_profile_entry {
2288: my ($cmd, $tail, $client) = @_;
1.229 foxr 2289:
1.230 foxr 2290: my $userinput = "$cmd:$tail";
2291:
1.242 raeburn 2292: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
1.230 foxr 2293: if ($namespace ne 'roles') {
2294: chomp($what);
2295: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2296: &GDBM_WRCREAT(),"P",$what);
2297: if($hashref) {
2298: my @pairs=split(/\&/,$what);
2299: foreach my $pair (@pairs) {
2300: my ($key,$value)=split(/=/,$pair);
2301: $hashref->{$key}=$value;
2302: }
2303: if (untie(%$hashref)) {
2304: &Reply( $client, "ok\n", $userinput);
2305: } else {
2306: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2307: "while attempting put\n",
2308: $userinput);
2309: }
2310: } else {
2311: &Failure( $client, "error: ".($!)." tie(GDBM) Failed ".
2312: "while attempting put\n", $userinput);
2313: }
2314: } else {
2315: &Failure( $client, "refused\n", $userinput);
2316: }
2317:
2318: return 1;
2319: }
2320: ®ister_handler("put", \&put_user_profile_entry, 0, 1, 0);
2321:
2322: #
2323: # Increment a profile entry in the user history file.
2324: # The history contains keyword value pairs. In this case,
2325: # The value itself is a pair of numbers. The first, the current value
2326: # the second an increment that this function applies to the current
2327: # value.
2328: #
2329: # Parameters:
2330: # $cmd - The command that got us here.
2331: # $tail - Tail of the command (remaining parameters).
2332: # $client - File descriptor connected to client.
2333: # Returns
2334: # 0 - Requested to exit, caller should shut down.
2335: # 1 - Continue processing.
2336: #
2337: sub increment_user_value_handler {
2338: my ($cmd, $tail, $client) = @_;
2339:
2340: my $userinput = "$cmd:$tail";
2341:
2342: my ($udom,$uname,$namespace,$what) =split(/:/,$tail);
2343: if ($namespace ne 'roles') {
2344: chomp($what);
2345: my $hashref = &tie_user_hash($udom, $uname,
2346: $namespace, &GDBM_WRCREAT(),
2347: "P",$what);
2348: if ($hashref) {
2349: my @pairs=split(/\&/,$what);
2350: foreach my $pair (@pairs) {
2351: my ($key,$value)=split(/=/,$pair);
2352: # We could check that we have a number...
2353: if (! defined($value) || $value eq '') {
2354: $value = 1;
2355: }
2356: $hashref->{$key}+=$value;
2357: }
2358: if (untie(%$hashref)) {
2359: &Reply( $client, "ok\n", $userinput);
2360: } else {
2361: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2362: "while attempting inc\n", $userinput);
2363: }
2364: } else {
2365: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2366: "while attempting inc\n", $userinput);
2367: }
2368: } else {
2369: &Failure($client, "refused\n", $userinput);
2370: }
2371:
2372: return 1;
2373: }
2374: ®ister_handler("inc", \&increment_user_value_handler, 0, 1, 0);
2375:
2376: #
2377: # Put a new role for a user. Roles are LonCAPA's packaging of permissions.
2378: # Each 'role' a user has implies a set of permissions. Adding a new role
2379: # for a person grants the permissions packaged with that role
2380: # to that user when the role is selected.
2381: #
2382: # Parameters:
2383: # $cmd - The command string (rolesput).
2384: # $tail - The remainder of the request line. For rolesput this
2385: # consists of a colon separated list that contains:
2386: # The domain and user that is granting the role (logged).
2387: # The domain and user that is getting the role.
2388: # The roles being granted as a set of & separated pairs.
2389: # each pair a key value pair.
2390: # $client - File descriptor connected to the client.
2391: # Returns:
2392: # 0 - If the daemon should exit
2393: # 1 - To continue processing.
2394: #
2395: #
2396: sub roles_put_handler {
2397: my ($cmd, $tail, $client) = @_;
2398:
2399: my $userinput = "$cmd:$tail";
2400:
2401: my ( $exedom, $exeuser, $udom, $uname, $what) = split(/:/,$tail);
2402:
2403:
2404: my $namespace='roles';
2405: chomp($what);
2406: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2407: &GDBM_WRCREAT(), "P",
2408: "$exedom:$exeuser:$what");
2409: #
2410: # Log the attempt to set a role. The {}'s here ensure that the file
2411: # handle is open for the minimal amount of time. Since the flush
2412: # is done on close this improves the chances the log will be an un-
2413: # corrupted ordered thing.
2414: if ($hashref) {
1.261 foxr 2415: my $pass_entry = &get_auth_type($udom, $uname);
2416: my ($auth_type,$pwd) = split(/:/, $pass_entry);
2417: $auth_type = $auth_type.":";
1.230 foxr 2418: my @pairs=split(/\&/,$what);
2419: foreach my $pair (@pairs) {
2420: my ($key,$value)=split(/=/,$pair);
2421: &manage_permissions($key, $udom, $uname,
1.260 foxr 2422: $auth_type);
1.230 foxr 2423: $hashref->{$key}=$value;
2424: }
2425: if (untie($hashref)) {
2426: &Reply($client, "ok\n", $userinput);
2427: } else {
2428: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2429: "while attempting rolesput\n", $userinput);
2430: }
2431: } else {
2432: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2433: "while attempting rolesput\n", $userinput);
2434: }
2435: return 1;
2436: }
2437: ®ister_handler("rolesput", \&roles_put_handler, 1,1,0); # Encoded client only.
2438:
2439: #
1.231 foxr 2440: # Deletes (removes) a role for a user. This is equivalent to removing
2441: # a permissions package associated with the role from the user's profile.
2442: #
2443: # Parameters:
2444: # $cmd - The command (rolesdel)
2445: # $tail - The remainder of the request line. This consists
2446: # of:
2447: # The domain and user requesting the change (logged)
2448: # The domain and user being changed.
2449: # The roles being revoked. These are shipped to us
2450: # as a bunch of & separated role name keywords.
2451: # $client - The file handle open on the client.
2452: # Returns:
2453: # 1 - Continue processing
2454: # 0 - Exit.
2455: #
2456: sub roles_delete_handler {
2457: my ($cmd, $tail, $client) = @_;
2458:
2459: my $userinput = "$cmd:$tail";
2460:
2461: my ($exedom,$exeuser,$udom,$uname,$what)=split(/:/,$tail);
2462: &Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom.
2463: "what = ".$what);
2464: my $namespace='roles';
2465: chomp($what);
2466: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2467: &GDBM_WRCREAT(), "D",
2468: "$exedom:$exeuser:$what");
2469:
2470: if ($hashref) {
2471: my @rolekeys=split(/\&/,$what);
2472:
2473: foreach my $key (@rolekeys) {
2474: delete $hashref->{$key};
2475: }
2476: if (untie(%$hashref)) {
2477: &Reply($client, "ok\n", $userinput);
2478: } else {
2479: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2480: "while attempting rolesdel\n", $userinput);
2481: }
2482: } else {
2483: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2484: "while attempting rolesdel\n", $userinput);
2485: }
2486:
2487: return 1;
2488: }
2489: ®ister_handler("rolesdel", \&roles_delete_handler, 1,1, 0); # Encoded client only
2490:
2491: # Unencrypted get from a user's profile database. See
2492: # GetProfileEntryEncrypted for a version that does end-to-end encryption.
2493: # This function retrieves a keyed item from a specific named database in the
2494: # user's directory.
2495: #
2496: # Parameters:
2497: # $cmd - Command request keyword (get).
2498: # $tail - Tail of the command. This is a colon separated list
2499: # consisting of the domain and username that uniquely
2500: # identifies the profile,
2501: # The 'namespace' which selects the gdbm file to
2502: # do the lookup in,
2503: # & separated list of keys to lookup. Note that
2504: # the values are returned as an & separated list too.
2505: # $client - File descriptor open on the client.
2506: # Returns:
2507: # 1 - Continue processing.
2508: # 0 - Exit.
2509: #
2510: sub get_profile_entry {
2511: my ($cmd, $tail, $client) = @_;
2512:
2513: my $userinput= "$cmd:$tail";
2514:
2515: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2516: chomp($what);
1.255 foxr 2517:
2518: my $replystring = read_profile($udom, $uname, $namespace, $what);
2519: my ($first) = split(/:/,$replystring);
2520: if($first ne "error") {
2521: &Reply($client, "$replystring\n", $userinput);
1.231 foxr 2522: } else {
1.255 foxr 2523: &Failure($client, $replystring." while attempting get\n", $userinput);
1.231 foxr 2524: }
2525: return 1;
1.255 foxr 2526:
2527:
1.231 foxr 2528: }
2529: ®ister_handler("get", \&get_profile_entry, 0,1,0);
2530:
2531: #
2532: # Process the encrypted get request. Note that the request is sent
2533: # in clear, but the reply is encrypted. This is a small covert channel:
2534: # information about the sensitive keys is given to the snooper. Just not
2535: # information about the values of the sensitive key. Hmm if I wanted to
2536: # know these I'd snoop for the egets. Get the profile item names from them
2537: # and then issue a get for them since there's no enforcement of the
2538: # requirement of an encrypted get for particular profile items. If I
2539: # were re-doing this, I'd force the request to be encrypted as well as the
2540: # reply. I'd also just enforce encrypted transactions for all gets since
2541: # that would prevent any covert channel snooping.
2542: #
2543: # Parameters:
2544: # $cmd - Command keyword of request (eget).
2545: # $tail - Tail of the command. See GetProfileEntry
# for more information about this.
2546: # $client - File open on the client.
2547: # Returns:
2548: # 1 - Continue processing
2549: # 0 - server should exit.
2550: sub get_profile_entry_encrypted {
2551: my ($cmd, $tail, $client) = @_;
2552:
2553: my $userinput = "$cmd:$tail";
2554:
2555: my ($cmd,$udom,$uname,$namespace,$what) = split(/:/,$userinput);
2556: chomp($what);
1.255 foxr 2557: my $qresult = read_profile($udom, $uname, $namespace, $what);
2558: my ($first) = split(/:/, $qresult);
2559: if($first ne "error") {
2560:
2561: if ($cipher) {
2562: my $cmdlength=length($qresult);
2563: $qresult.=" ";
2564: my $encqresult='';
2565: for(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
2566: $encqresult.= unpack("H16",
2567: $cipher->encrypt(substr($qresult,
2568: $encidx,
2569: 8)));
2570: }
2571: &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput);
2572: } else {
1.231 foxr 2573: &Failure( $client, "error:no_key\n", $userinput);
2574: }
2575: } else {
1.255 foxr 2576: &Failure($client, "$qresult while attempting eget\n", $userinput);
2577:
1.231 foxr 2578: }
2579:
2580: return 1;
2581: }
1.255 foxr 2582: ®ister_handler("eget", \&get_profile_entry_encrypted, 0, 1, 0);
1.263 albertel 2583:
1.231 foxr 2584: #
2585: # Deletes a key in a user profile database.
2586: #
2587: # Parameters:
2588: # $cmd - Command keyword (del).
2589: # $tail - Command tail. IN this case a colon
2590: # separated list containing:
2591: # The domain and user that identifies uniquely
2592: # the identity of the user.
2593: # The profile namespace (name of the profile
2594: # database file).
2595: # & separated list of keywords to delete.
2596: # $client - File open on client socket.
2597: # Returns:
2598: # 1 - Continue processing
2599: # 0 - Exit server.
2600: #
2601: #
2602: sub delete_profile_entry {
2603: my ($cmd, $tail, $client) = @_;
2604:
2605: my $userinput = "cmd:$tail";
2606:
2607: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2608: chomp($what);
2609: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2610: &GDBM_WRCREAT(),
2611: "D",$what);
2612: if ($hashref) {
2613: my @keys=split(/\&/,$what);
2614: foreach my $key (@keys) {
2615: delete($hashref->{$key});
2616: }
2617: if (untie(%$hashref)) {
2618: &Reply($client, "ok\n", $userinput);
2619: } else {
2620: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2621: "while attempting del\n", $userinput);
2622: }
2623: } else {
2624: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2625: "while attempting del\n", $userinput);
2626: }
2627: return 1;
2628: }
2629: ®ister_handler("del", \&delete_profile_entry, 0, 1, 0);
1.263 albertel 2630:
1.231 foxr 2631: #
2632: # List the set of keys that are defined in a profile database file.
2633: # A successful reply from this will contain an & separated list of
2634: # the keys.
2635: # Parameters:
2636: # $cmd - Command request (keys).
2637: # $tail - Remainder of the request, a colon separated
2638: # list containing domain/user that identifies the
2639: # user being queried, and the database namespace
2640: # (database filename essentially).
2641: # $client - File open on the client.
2642: # Returns:
2643: # 1 - Continue processing.
2644: # 0 - Exit the server.
2645: #
2646: sub get_profile_keys {
2647: my ($cmd, $tail, $client) = @_;
2648:
2649: my $userinput = "$cmd:$tail";
2650:
2651: my ($udom,$uname,$namespace)=split(/:/,$tail);
2652: my $qresult='';
2653: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2654: &GDBM_READER());
2655: if ($hashref) {
2656: foreach my $key (keys %$hashref) {
2657: $qresult.="$key&";
2658: }
2659: if (untie(%$hashref)) {
2660: $qresult=~s/\&$//;
2661: &Reply($client, "$qresult\n", $userinput);
2662: } else {
2663: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2664: "while attempting keys\n", $userinput);
2665: }
2666: } else {
2667: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2668: "while attempting keys\n", $userinput);
2669: }
2670:
2671: return 1;
2672: }
2673: ®ister_handler("keys", \&get_profile_keys, 0, 1, 0);
2674:
2675: #
2676: # Dump the contents of a user profile database.
2677: # Note that this constitutes a very large covert channel too since
2678: # the dump will return sensitive information that is not encrypted.
2679: # The naive security assumption is that the session negotiation ensures
2680: # our client is trusted and I don't believe that's assured at present.
2681: # Sure want badly to go to ssl or tls. Of course if my peer isn't really
2682: # a LonCAPA node they could have negotiated an encryption key too so >sigh<.
2683: #
2684: # Parameters:
2685: # $cmd - The command request keyword (currentdump).
2686: # $tail - Remainder of the request, consisting of a colon
2687: # separated list that has the domain/username and
2688: # the namespace to dump (database file).
2689: # $client - file open on the remote client.
2690: # Returns:
2691: # 1 - Continue processing.
2692: # 0 - Exit the server.
2693: #
2694: sub dump_profile_database {
2695: my ($cmd, $tail, $client) = @_;
2696:
2697: my $userinput = "$cmd:$tail";
2698:
2699: my ($udom,$uname,$namespace) = split(/:/,$tail);
2700: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2701: &GDBM_READER());
2702: if ($hashref) {
2703: # Structure of %data:
2704: # $data{$symb}->{$parameter}=$value;
2705: # $data{$symb}->{'v.'.$parameter}=$version;
2706: # since $parameter will be unescaped, we do not
2707: # have to worry about silly parameter names...
2708:
2709: my $qresult='';
2710: my %data = (); # A hash of anonymous hashes..
2711: while (my ($key,$value) = each(%$hashref)) {
2712: my ($v,$symb,$param) = split(/:/,$key);
2713: next if ($v eq 'version' || $symb eq 'keys');
2714: next if (exists($data{$symb}) &&
2715: exists($data{$symb}->{$param}) &&
2716: $data{$symb}->{'v.'.$param} > $v);
2717: $data{$symb}->{$param}=$value;
2718: $data{$symb}->{'v.'.$param}=$v;
2719: }
2720: if (untie(%$hashref)) {
2721: while (my ($symb,$param_hash) = each(%data)) {
2722: while(my ($param,$value) = each (%$param_hash)){
2723: next if ($param =~ /^v\./); # Ignore versions...
2724: #
2725: # Just dump the symb=value pairs separated by &
2726: #
2727: $qresult.=$symb.':'.$param.'='.$value.'&';
2728: }
2729: }
2730: chop($qresult);
2731: &Reply($client , "$qresult\n", $userinput);
2732: } else {
2733: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2734: "while attempting currentdump\n", $userinput);
2735: }
2736: } else {
2737: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2738: "while attempting currentdump\n", $userinput);
2739: }
2740:
2741: return 1;
2742: }
2743: ®ister_handler("currentdump", \&dump_profile_database, 0, 1, 0);
2744:
2745: #
2746: # Dump a profile database with an optional regular expression
2747: # to match against the keys. In this dump, no effort is made
2748: # to separate symb from version information. Presumably the
2749: # databases that are dumped by this command are of a different
2750: # structure. Need to look at this and improve the documentation of
2751: # both this and the currentdump handler.
2752: # Parameters:
2753: # $cmd - The command keyword.
2754: # $tail - All of the characters after the $cmd:
2755: # These are expected to be a colon
2756: # separated list containing:
2757: # domain/user - identifying the user.
2758: # namespace - identifying the database.
2759: # regexp - optional regular expression
2760: # that is matched against
2761: # database keywords to do
2762: # selective dumps.
2763: # $client - Channel open on the client.
2764: # Returns:
2765: # 1 - Continue processing.
2766: # Side effects:
2767: # response is written to $client.
2768: #
2769: sub dump_with_regexp {
2770: my ($cmd, $tail, $client) = @_;
2771:
2772:
2773: my $userinput = "$cmd:$tail";
2774:
2775: my ($udom,$uname,$namespace,$regexp)=split(/:/,$tail);
2776: if (defined($regexp)) {
2777: $regexp=&unescape($regexp);
2778: } else {
2779: $regexp='.';
2780: }
2781: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2782: &GDBM_READER());
2783: if ($hashref) {
2784: my $qresult='';
2785: while (my ($key,$value) = each(%$hashref)) {
2786: if ($regexp eq '.') {
2787: $qresult.=$key.'='.$value.'&';
2788: } else {
2789: my $unescapeKey = &unescape($key);
2790: if (eval('$unescapeKey=~/$regexp/')) {
2791: $qresult.="$key=$value&";
2792: }
2793: }
2794: }
2795: if (untie(%$hashref)) {
2796: chop($qresult);
2797: &Reply($client, "$qresult\n", $userinput);
2798: } else {
2799: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2800: "while attempting dump\n", $userinput);
2801: }
2802: } else {
2803: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2804: "while attempting dump\n", $userinput);
2805: }
2806:
2807: return 1;
2808: }
2809: ®ister_handler("dump", \&dump_with_regexp, 0, 1, 0);
2810:
2811: # Store a set of key=value pairs associated with a versioned name.
2812: #
2813: # Parameters:
2814: # $cmd - Request command keyword.
2815: # $tail - Tail of the request. This is a colon
2816: # separated list containing:
2817: # domain/user - User and authentication domain.
2818: # namespace - Name of the database being modified
2819: # rid - Resource keyword to modify.
2820: # what - new value associated with rid.
2821: #
2822: # $client - Socket open on the client.
2823: #
2824: #
2825: # Returns:
2826: # 1 (keep on processing).
2827: # Side-Effects:
2828: # Writes to the client
2829: sub store_handler {
2830: my ($cmd, $tail, $client) = @_;
2831:
2832: my $userinput = "$cmd:$tail";
2833:
2834: my ($udom,$uname,$namespace,$rid,$what) =split(/:/,$tail);
2835: if ($namespace ne 'roles') {
2836:
2837: chomp($what);
2838: my @pairs=split(/\&/,$what);
2839: my $hashref = &tie_user_hash($udom, $uname, $namespace,
1.268 albertel 2840: &GDBM_WRCREAT(), "S",
1.231 foxr 2841: "$rid:$what");
2842: if ($hashref) {
2843: my $now = time;
2844: my @previouskeys=split(/&/,$hashref->{"keys:$rid"});
2845: my $key;
2846: $hashref->{"version:$rid"}++;
2847: my $version=$hashref->{"version:$rid"};
2848: my $allkeys='';
2849: foreach my $pair (@pairs) {
2850: my ($key,$value)=split(/=/,$pair);
2851: $allkeys.=$key.':';
2852: $hashref->{"$version:$rid:$key"}=$value;
2853: }
2854: $hashref->{"$version:$rid:timestamp"}=$now;
2855: $allkeys.='timestamp';
2856: $hashref->{"$version:keys:$rid"}=$allkeys;
2857: if (untie($hashref)) {
2858: &Reply($client, "ok\n", $userinput);
2859: } else {
2860: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2861: "while attempting store\n", $userinput);
2862: }
2863: } else {
2864: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2865: "while attempting store\n", $userinput);
2866: }
2867: } else {
2868: &Failure($client, "refused\n", $userinput);
2869: }
2870:
2871: return 1;
2872: }
2873: ®ister_handler("store", \&store_handler, 0, 1, 0);
1.263 albertel 2874:
1.231 foxr 2875: #
2876: # Dump out all versions of a resource that has key=value pairs associated
2877: # with it for each version. These resources are built up via the store
2878: # command.
2879: #
2880: # Parameters:
2881: # $cmd - Command keyword.
2882: # $tail - Remainder of the request which consists of:
2883: # domain/user - User and auth. domain.
2884: # namespace - name of resource database.
2885: # rid - Resource id.
2886: # $client - socket open on the client.
2887: #
2888: # Returns:
2889: # 1 indicating the caller should not yet exit.
2890: # Side-effects:
2891: # Writes a reply to the client.
2892: # The reply is a string of the following shape:
2893: # version=current&version:keys=k1:k2...&1:k1=v1&1:k2=v2...
2894: # Where the 1 above represents version 1.
2895: # this continues for all pairs of keys in all versions.
2896: #
2897: #
2898: #
2899: #
2900: sub restore_handler {
2901: my ($cmd, $tail, $client) = @_;
2902:
2903: my $userinput = "$cmd:$tail"; # Only used for logging purposes.
2904:
2905: my ($cmd,$udom,$uname,$namespace,$rid) = split(/:/,$userinput);
2906: $namespace=~s/\//\_/g;
2907: $namespace=~s/\W//g;
2908: chomp($rid);
2909: my $proname=&propath($udom,$uname);
2910: my $qresult='';
2911: my %hash;
2912: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",
2913: &GDBM_READER(),0640)) {
2914: my $version=$hash{"version:$rid"};
2915: $qresult.="version=$version&";
2916: my $scope;
2917: for ($scope=1;$scope<=$version;$scope++) {
2918: my $vkeys=$hash{"$scope:keys:$rid"};
2919: my @keys=split(/:/,$vkeys);
2920: my $key;
2921: $qresult.="$scope:keys=$vkeys&";
2922: foreach $key (@keys) {
2923: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
2924: }
2925: }
2926: if (untie(%hash)) {
2927: $qresult=~s/\&$//;
2928: &Reply( $client, "$qresult\n", $userinput);
2929: } else {
2930: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2931: "while attempting restore\n", $userinput);
2932: }
2933: } else {
2934: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2935: "while attempting restore\n", $userinput);
2936: }
2937:
2938: return 1;
2939:
2940:
2941: }
2942: ®ister_handler("restore", \&restore_handler, 0,1,0);
1.234 foxr 2943:
2944: #
2945: # Add a chat message to to a discussion board.
2946: #
2947: # Parameters:
2948: # $cmd - Request keyword.
2949: # $tail - Tail of the command. A colon separated list
2950: # containing:
2951: # cdom - Domain on which the chat board lives
2952: # cnum - Identifier of the discussion group.
2953: # post - Body of the posting.
2954: # $client - Socket open on the client.
2955: # Returns:
2956: # 1 - Indicating caller should keep on processing.
2957: #
2958: # Side-effects:
2959: # writes a reply to the client.
2960: #
2961: #
2962: sub send_chat_handler {
2963: my ($cmd, $tail, $client) = @_;
2964:
2965:
2966: my $userinput = "$cmd:$tail";
2967:
2968: my ($cdom,$cnum,$newpost)=split(/\:/,$tail);
2969: &chat_add($cdom,$cnum,$newpost);
2970: &Reply($client, "ok\n", $userinput);
2971:
2972: return 1;
2973: }
2974: ®ister_handler("chatsend", \&send_chat_handler, 0, 1, 0);
1.263 albertel 2975:
1.234 foxr 2976: #
2977: # Retrieve the set of chat messagss from a discussion board.
2978: #
2979: # Parameters:
2980: # $cmd - Command keyword that initiated the request.
2981: # $tail - Remainder of the request after the command
2982: # keyword. In this case a colon separated list of
2983: # chat domain - Which discussion board.
2984: # chat id - Discussion thread(?)
2985: # domain/user - Authentication domain and username
2986: # of the requesting person.
2987: # $client - Socket open on the client program.
2988: # Returns:
2989: # 1 - continue processing
2990: # Side effects:
2991: # Response is written to the client.
2992: #
2993: sub retrieve_chat_handler {
2994: my ($cmd, $tail, $client) = @_;
2995:
2996:
2997: my $userinput = "$cmd:$tail";
2998:
2999: my ($cdom,$cnum,$udom,$uname)=split(/\:/,$tail);
3000: my $reply='';
3001: foreach (&get_chat($cdom,$cnum,$udom,$uname)) {
3002: $reply.=&escape($_).':';
3003: }
3004: $reply=~s/\:$//;
3005: &Reply($client, $reply."\n", $userinput);
3006:
3007:
3008: return 1;
3009: }
3010: ®ister_handler("chatretr", \&retrieve_chat_handler, 0, 1, 0);
3011:
3012: #
3013: # Initiate a query of an sql database. SQL query repsonses get put in
3014: # a file for later retrieval. This prevents sql query results from
3015: # bottlenecking the system. Note that with loncnew, perhaps this is
3016: # less of an issue since multiple outstanding requests can be concurrently
3017: # serviced.
3018: #
3019: # Parameters:
3020: # $cmd - COmmand keyword that initiated the request.
3021: # $tail - Remainder of the command after the keyword.
3022: # For this function, this consists of a query and
3023: # 3 arguments that are self-documentingly labelled
3024: # in the original arg1, arg2, arg3.
3025: # $client - Socket open on the client.
3026: # Return:
3027: # 1 - Indicating processing should continue.
3028: # Side-effects:
3029: # a reply is written to $client.
3030: #
3031: sub send_query_handler {
3032: my ($cmd, $tail, $client) = @_;
3033:
3034:
3035: my $userinput = "$cmd:$tail";
3036:
3037: my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail);
3038: $query=~s/\n*$//g;
3039: &Reply($client, "". &sql_reply("$clientname\&$query".
3040: "\&$arg1"."\&$arg2"."\&$arg3")."\n",
3041: $userinput);
3042:
3043: return 1;
3044: }
3045: ®ister_handler("querysend", \&send_query_handler, 0, 1, 0);
3046:
3047: #
3048: # Add a reply to an sql query. SQL queries are done asyncrhonously.
3049: # The query is submitted via a "querysend" transaction.
3050: # There it is passed on to the lonsql daemon, queued and issued to
3051: # mysql.
3052: # This transaction is invoked when the sql transaction is complete
3053: # it stores the query results in flie and indicates query completion.
3054: # presumably local software then fetches this response... I'm guessing
3055: # the sequence is: lonc does a querysend, we ask lonsql to do it.
3056: # lonsql on completion of the query interacts with the lond of our
3057: # client to do a query reply storing two files:
3058: # - id - The results of the query.
3059: # - id.end - Indicating the transaction completed.
3060: # NOTE: id is a unique id assigned to the query and querysend time.
3061: # Parameters:
3062: # $cmd - Command keyword that initiated this request.
3063: # $tail - Remainder of the tail. In this case that's a colon
3064: # separated list containing the query Id and the
3065: # results of the query.
3066: # $client - Socket open on the client.
3067: # Return:
3068: # 1 - Indicating that we should continue processing.
3069: # Side effects:
3070: # ok written to the client.
3071: #
3072: sub reply_query_handler {
3073: my ($cmd, $tail, $client) = @_;
3074:
3075:
3076: my $userinput = "$cmd:$tail";
3077:
3078: my ($cmd,$id,$reply)=split(/:/,$userinput);
3079: my $store;
3080: my $execdir=$perlvar{'lonDaemons'};
3081: if ($store=IO::File->new(">$execdir/tmp/$id")) {
3082: $reply=~s/\&/\n/g;
3083: print $store $reply;
3084: close $store;
3085: my $store2=IO::File->new(">$execdir/tmp/$id.end");
3086: print $store2 "done\n";
3087: close $store2;
3088: &Reply($client, "ok\n", $userinput);
3089: } else {
3090: &Failure($client, "error: ".($!+0)
3091: ." IO::File->new Failed ".
3092: "while attempting queryreply\n", $userinput);
3093: }
3094:
3095:
3096: return 1;
3097: }
3098: ®ister_handler("queryreply", \&reply_query_handler, 0, 1, 0);
3099:
3100: #
3101: # Process the courseidput request. Not quite sure what this means
3102: # at the system level sense. It appears a gdbm file in the
3103: # /home/httpd/lonUsers/$domain/nohist_courseids is tied and
3104: # a set of entries made in that database.
3105: #
3106: # Parameters:
3107: # $cmd - The command keyword that initiated this request.
3108: # $tail - Tail of the command. In this case consists of a colon
3109: # separated list contaning the domain to apply this to and
3110: # an ampersand separated list of keyword=value pairs.
1.272 ! raeburn 3111: # Each value is a colon separated list that includes:
! 3112: # description, institutional code and course owner.
! 3113: # For backward compatibility with versions included
! 3114: # in LON-CAPA 1.1.X (and earlier) and 1.2.X, institutional
! 3115: # code and/or course owner are preserved from the existing
! 3116: # record when writing a new record in response to 1.1 or
! 3117: # 1.2 implementations of lonnet::flushcourselogs().
! 3118: #
1.234 foxr 3119: # $client - Socket open on the client.
3120: # Returns:
3121: # 1 - indicating that processing should continue
3122: #
3123: # Side effects:
3124: # reply is written to the client.
3125: #
3126: sub put_course_id_handler {
3127: my ($cmd, $tail, $client) = @_;
3128:
3129:
3130: my $userinput = "$cmd:$tail";
3131:
1.266 raeburn 3132: my ($udom, $what) = split(/:/, $tail,2);
1.234 foxr 3133: chomp($what);
3134: my $now=time;
3135: my @pairs=split(/\&/,$what);
3136:
3137: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3138: if ($hashref) {
3139: foreach my $pair (@pairs) {
1.271 raeburn 3140: my ($key,$courseinfo) = split(/=/,$pair,2);
3141: $courseinfo =~ s/=/:/g;
1.272 ! raeburn 3142:
! 3143: my @current_items = split/:/,$hashref->{$key};
! 3144: shift @current_items; # remove description
! 3145: pop @current_items; # remove last access
! 3146: my $numcurrent = scalar(@current_items);
! 3147:
! 3148: my @new_items = split/:/,$courseinfo;
! 3149: my $numnew = scalar(@new_items);
! 3150: if ($numcurrent > 0) {
! 3151: if ($numnew == 1) { # flushcourselogs() from 1.1 or earlier
! 3152: $courseinfo .= ':'.join(':',@current_items);
! 3153: } elsif ($numnew == 2) { # flushcourselogs() from 1.2.X
! 3154: $courseinfo .= ':'.$current_items[$numcurrent-1];
! 3155: }
! 3156: }
1.266 raeburn 3157: $hashref->{$key}=$courseinfo.':'.$now;
1.234 foxr 3158: }
3159: if (untie(%$hashref)) {
1.253 foxr 3160: &Reply( $client, "ok\n", $userinput);
1.234 foxr 3161: } else {
1.253 foxr 3162: &Failure($client, "error: ".($!+0)
1.234 foxr 3163: ." untie(GDBM) Failed ".
3164: "while attempting courseidput\n", $userinput);
3165: }
3166: } else {
1.253 foxr 3167: &Failure($client, "error: ".($!+0)
1.234 foxr 3168: ." tie(GDBM) Failed ".
3169: "while attempting courseidput\n", $userinput);
3170: }
1.253 foxr 3171:
1.234 foxr 3172:
3173: return 1;
3174: }
3175: ®ister_handler("courseidput", \&put_course_id_handler, 0, 1, 0);
3176:
3177: # Retrieves the value of a course id resource keyword pattern
3178: # defined since a starting date. Both the starting date and the
3179: # keyword pattern are optional. If the starting date is not supplied it
3180: # is treated as the beginning of time. If the pattern is not found,
3181: # it is treatred as "." matching everything.
3182: #
3183: # Parameters:
3184: # $cmd - Command keyword that resulted in us being dispatched.
3185: # $tail - The remainder of the command that, in this case, consists
3186: # of a colon separated list of:
3187: # domain - The domain in which the course database is
3188: # defined.
3189: # since - Optional parameter describing the minimum
3190: # time of definition(?) of the resources that
3191: # will match the dump.
3192: # description - regular expression that is used to filter
3193: # the dump. Only keywords matching this regexp
3194: # will be used.
1.272 ! raeburn 3195: # institutional code - optional supplied code to filter
! 3196: # the dump. Only courses with an institutional code
! 3197: # that match the supplied code will be returned.
! 3198: # owner - optional supplied username of owner to filter
! 3199: # the dump. Only courses for which the course
! 3200: # owner matches the supplied username will be
! 3201: # returned. Implicit assumption that owner is a user
! 3202: # in the domain in which the course database is defined.
1.234 foxr 3203: # $client - The socket open on the client.
3204: # Returns:
3205: # 1 - Continue processing.
3206: # Side Effects:
3207: # a reply is written to $client.
3208: sub dump_course_id_handler {
3209: my ($cmd, $tail, $client) = @_;
3210:
3211: my $userinput = "$cmd:$tail";
3212:
1.266 raeburn 3213: my ($udom,$since,$description,$instcodefilter,$ownerfilter) =split(/:/,$tail);
1.234 foxr 3214: if (defined($description)) {
3215: $description=&unescape($description);
3216: } else {
3217: $description='.';
3218: }
1.266 raeburn 3219: if (defined($instcodefilter)) {
3220: $instcodefilter=&unescape($instcodefilter);
3221: } else {
3222: $instcodefilter='.';
3223: }
3224: if (defined($ownerfilter)) {
3225: $ownerfilter=&unescape($ownerfilter);
3226: } else {
3227: $ownerfilter='.';
3228: }
3229:
1.234 foxr 3230: unless (defined($since)) { $since=0; }
3231: my $qresult='';
3232: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3233: if ($hashref) {
3234: while (my ($key,$value) = each(%$hashref)) {
1.266 raeburn 3235: my ($descr,$lasttime,$inst_code,$owner);
1.272 ! raeburn 3236: my @courseitems = split/:/,$value;
! 3237: $descr = shift @courseitems;
! 3238: $lasttime = pop @courseitems;
! 3239: if (@courseitems > 0) {
! 3240: $inst_code = shift @courseitems;
! 3241: }
! 3242: if (@courseitems > 0) {
! 3243: $owner = shift @courseitems;
! 3244: }
1.234 foxr 3245: if ($lasttime<$since) { next; }
1.266 raeburn 3246: my $match = 1;
3247: unless ($description eq '.') {
3248: my $unescapeDescr = &unescape($descr);
3249: unless (eval('$unescapeDescr=~/\Q$description\E/i')) {
3250: $match = 0;
1.234 foxr 3251: }
1.266 raeburn 3252: }
3253: unless ($instcodefilter eq '.' || !defined($instcodefilter)) {
3254: my $unescapeInstcode = &unescape($inst_code);
3255: unless (eval('$unescapeInstcode=~/\Q$instcodefilter\E/i')) {
3256: $match = 0;
3257: }
1.234 foxr 3258: }
1.266 raeburn 3259: unless ($ownerfilter eq '.' || !defined($ownerfilter)) {
3260: my $unescapeOwner = &unescape($owner);
3261: unless (eval('$unescapeOwner=~/\Q$ownerfilter\E/i')) {
3262: $match = 0;
3263: }
3264: }
3265: if ($match == 1) {
3266: $qresult.=$key.'='.$descr.':'.$inst_code.':'.$owner.'&';
3267: }
1.234 foxr 3268: }
3269: if (untie(%$hashref)) {
3270: chop($qresult);
3271: &Reply($client, "$qresult\n", $userinput);
3272: } else {
3273: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3274: "while attempting courseiddump\n", $userinput);
3275: }
3276: } else {
3277: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3278: "while attempting courseiddump\n", $userinput);
3279: }
3280:
3281:
3282: return 1;
3283: }
3284: ®ister_handler("courseiddump", \&dump_course_id_handler, 0, 1, 0);
1.238 foxr 3285:
3286: #
3287: # Puts an id to a domains id database.
3288: #
3289: # Parameters:
3290: # $cmd - The command that triggered us.
3291: # $tail - Remainder of the request other than the command. This is a
3292: # colon separated list containing:
3293: # $domain - The domain for which we are writing the id.
3294: # $pairs - The id info to write... this is and & separated list
3295: # of keyword=value.
3296: # $client - Socket open on the client.
3297: # Returns:
3298: # 1 - Continue processing.
3299: # Side effects:
3300: # reply is written to $client.
3301: #
3302: sub put_id_handler {
3303: my ($cmd,$tail,$client) = @_;
3304:
3305:
3306: my $userinput = "$cmd:$tail";
3307:
3308: my ($udom,$what)=split(/:/,$tail);
3309: chomp($what);
3310: my @pairs=split(/\&/,$what);
3311: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
3312: "P", $what);
3313: if ($hashref) {
3314: foreach my $pair (@pairs) {
3315: my ($key,$value)=split(/=/,$pair);
3316: $hashref->{$key}=$value;
3317: }
3318: if (untie(%$hashref)) {
3319: &Reply($client, "ok\n", $userinput);
3320: } else {
3321: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3322: "while attempting idput\n", $userinput);
3323: }
3324: } else {
3325: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3326: "while attempting idput\n", $userinput);
3327: }
3328:
3329: return 1;
3330: }
1.263 albertel 3331: ®ister_handler("idput", \&put_id_handler, 0, 1, 0);
1.238 foxr 3332:
3333: #
3334: # Retrieves a set of id values from the id database.
3335: # Returns an & separated list of results, one for each requested id to the
3336: # client.
3337: #
3338: # Parameters:
3339: # $cmd - Command keyword that caused us to be dispatched.
3340: # $tail - Tail of the command. Consists of a colon separated:
3341: # domain - the domain whose id table we dump
3342: # ids Consists of an & separated list of
3343: # id keywords whose values will be fetched.
3344: # nonexisting keywords will have an empty value.
3345: # $client - Socket open on the client.
3346: #
3347: # Returns:
3348: # 1 - indicating processing should continue.
3349: # Side effects:
3350: # An & separated list of results is written to $client.
3351: #
3352: sub get_id_handler {
3353: my ($cmd, $tail, $client) = @_;
3354:
3355:
3356: my $userinput = "$client:$tail";
3357:
3358: my ($udom,$what)=split(/:/,$tail);
3359: chomp($what);
3360: my @queries=split(/\&/,$what);
3361: my $qresult='';
3362: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_READER());
3363: if ($hashref) {
3364: for (my $i=0;$i<=$#queries;$i++) {
3365: $qresult.="$hashref->{$queries[$i]}&";
3366: }
3367: if (untie(%$hashref)) {
3368: $qresult=~s/\&$//;
3369: &Reply($client, "$qresult\n", $userinput);
3370: } else {
3371: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3372: "while attempting idget\n",$userinput);
3373: }
3374: } else {
3375: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3376: "while attempting idget\n",$userinput);
3377: }
3378:
3379: return 1;
3380: }
1.263 albertel 3381: ®ister_handler("idget", \&get_id_handler, 0, 1, 0);
1.238 foxr 3382:
3383: #
3384: # Process the tmpput command I'm not sure what this does.. Seems to
3385: # create a file in the lonDaemons/tmp directory of the form $id.tmp
3386: # where Id is the client's ip concatenated with a sequence number.
3387: # The file will contain some value that is passed in. Is this e.g.
3388: # a login token?
3389: #
3390: # Parameters:
3391: # $cmd - The command that got us dispatched.
3392: # $tail - The remainder of the request following $cmd:
3393: # In this case this will be the contents of the file.
3394: # $client - Socket connected to the client.
3395: # Returns:
3396: # 1 indicating processing can continue.
3397: # Side effects:
3398: # A file is created in the local filesystem.
3399: # A reply is sent to the client.
3400: sub tmp_put_handler {
3401: my ($cmd, $what, $client) = @_;
3402:
3403: my $userinput = "$cmd:$what"; # Reconstruct for logging.
3404:
3405:
3406: my $store;
3407: $tmpsnum++;
3408: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
3409: $id=~s/\W/\_/g;
3410: $what=~s/\n//g;
3411: my $execdir=$perlvar{'lonDaemons'};
3412: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
3413: print $store $what;
3414: close $store;
3415: &Reply($client, "$id\n", $userinput);
3416: } else {
3417: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
3418: "while attempting tmpput\n", $userinput);
3419: }
3420: return 1;
3421:
3422: }
3423: ®ister_handler("tmpput", \&tmp_put_handler, 0, 1, 0);
1.263 albertel 3424:
1.238 foxr 3425: # Processes the tmpget command. This command returns the contents
3426: # of a temporary resource file(?) created via tmpput.
3427: #
3428: # Paramters:
3429: # $cmd - Command that got us dispatched.
3430: # $id - Tail of the command, contain the id of the resource
3431: # we want to fetch.
3432: # $client - socket open on the client.
3433: # Return:
3434: # 1 - Inidcating processing can continue.
3435: # Side effects:
3436: # A reply is sent to the client.
3437: #
3438: sub tmp_get_handler {
3439: my ($cmd, $id, $client) = @_;
3440:
3441: my $userinput = "$cmd:$id";
3442:
3443:
3444: $id=~s/\W/\_/g;
3445: my $store;
3446: my $execdir=$perlvar{'lonDaemons'};
3447: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
3448: my $reply=<$store>;
3449: &Reply( $client, "$reply\n", $userinput);
3450: close $store;
3451: } else {
3452: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
3453: "while attempting tmpget\n", $userinput);
3454: }
3455:
3456: return 1;
3457: }
3458: ®ister_handler("tmpget", \&tmp_get_handler, 0, 1, 0);
1.263 albertel 3459:
1.238 foxr 3460: #
3461: # Process the tmpdel command. This command deletes a temp resource
3462: # created by the tmpput command.
3463: #
3464: # Parameters:
3465: # $cmd - Command that got us here.
3466: # $id - Id of the temporary resource created.
3467: # $client - socket open on the client process.
3468: #
3469: # Returns:
3470: # 1 - Indicating processing should continue.
3471: # Side Effects:
3472: # A file is deleted
3473: # A reply is sent to the client.
3474: sub tmp_del_handler {
3475: my ($cmd, $id, $client) = @_;
3476:
3477: my $userinput= "$cmd:$id";
3478:
3479: chomp($id);
3480: $id=~s/\W/\_/g;
3481: my $execdir=$perlvar{'lonDaemons'};
3482: if (unlink("$execdir/tmp/$id.tmp")) {
3483: &Reply($client, "ok\n", $userinput);
3484: } else {
3485: &Failure( $client, "error: ".($!+0)."Unlink tmp Failed ".
3486: "while attempting tmpdel\n", $userinput);
3487: }
3488:
3489: return 1;
3490:
3491: }
3492: ®ister_handler("tmpdel", \&tmp_del_handler, 0, 1, 0);
1.263 albertel 3493:
1.238 foxr 3494: #
1.246 foxr 3495: # Processes the setannounce command. This command
3496: # creates a file named announce.txt in the top directory of
3497: # the documentn root and sets its contents. The announce.txt file is
3498: # printed in its entirety at the LonCAPA login page. Note:
3499: # once the announcement.txt fileis created it cannot be deleted.
3500: # However, setting the contents of the file to empty removes the
3501: # announcement from the login page of loncapa so who cares.
3502: #
3503: # Parameters:
3504: # $cmd - The command that got us dispatched.
3505: # $announcement - The text of the announcement.
3506: # $client - Socket open on the client process.
3507: # Retunrns:
3508: # 1 - Indicating request processing should continue
3509: # Side Effects:
3510: # The file {DocRoot}/announcement.txt is created.
3511: # A reply is sent to $client.
3512: #
3513: sub set_announce_handler {
3514: my ($cmd, $announcement, $client) = @_;
3515:
3516: my $userinput = "$cmd:$announcement";
3517:
3518: chomp($announcement);
3519: $announcement=&unescape($announcement);
3520: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
3521: '/announcement.txt')) {
3522: print $store $announcement;
3523: close $store;
3524: &Reply($client, "ok\n", $userinput);
3525: } else {
3526: &Failure($client, "error: ".($!+0)."\n", $userinput);
3527: }
3528:
3529: return 1;
3530: }
3531: ®ister_handler("setannounce", \&set_announce_handler, 0, 1, 0);
1.263 albertel 3532:
1.246 foxr 3533: #
3534: # Return the version of the daemon. This can be used to determine
3535: # the compatibility of cross version installations or, alternatively to
3536: # simply know who's out of date and who isn't. Note that the version
3537: # is returned concatenated with the tail.
3538: # Parameters:
3539: # $cmd - the request that dispatched to us.
3540: # $tail - Tail of the request (client's version?).
3541: # $client - Socket open on the client.
3542: #Returns:
3543: # 1 - continue processing requests.
3544: # Side Effects:
3545: # Replies with version to $client.
3546: sub get_version_handler {
3547: my ($cmd, $tail, $client) = @_;
3548:
3549: my $userinput = $cmd.$tail;
3550:
3551: &Reply($client, &version($userinput)."\n", $userinput);
3552:
3553:
3554: return 1;
3555: }
3556: ®ister_handler("version", \&get_version_handler, 0, 1, 0);
1.263 albertel 3557:
1.246 foxr 3558: # Set the current host and domain. This is used to support
3559: # multihomed systems. Each IP of the system, or even separate daemons
3560: # on the same IP can be treated as handling a separate lonCAPA virtual
3561: # machine. This command selects the virtual lonCAPA. The client always
3562: # knows the right one since it is lonc and it is selecting the domain/system
3563: # from the hosts.tab file.
3564: # Parameters:
3565: # $cmd - Command that dispatched us.
3566: # $tail - Tail of the command (domain/host requested).
3567: # $socket - Socket open on the client.
3568: #
3569: # Returns:
3570: # 1 - Indicates the program should continue to process requests.
3571: # Side-effects:
3572: # The default domain/system context is modified for this daemon.
3573: # a reply is sent to the client.
3574: #
3575: sub set_virtual_host_handler {
3576: my ($cmd, $tail, $socket) = @_;
3577:
3578: my $userinput ="$cmd:$tail";
3579:
3580: &Reply($client, &sethost($userinput)."\n", $userinput);
3581:
3582:
3583: return 1;
3584: }
1.247 albertel 3585: ®ister_handler("sethost", \&set_virtual_host_handler, 0, 1, 0);
1.246 foxr 3586:
3587: # Process a request to exit:
3588: # - "bye" is sent to the client.
3589: # - The client socket is shutdown and closed.
3590: # - We indicate to the caller that we should exit.
3591: # Formal Parameters:
3592: # $cmd - The command that got us here.
3593: # $tail - Tail of the command (empty).
3594: # $client - Socket open on the tail.
3595: # Returns:
3596: # 0 - Indicating the program should exit!!
3597: #
3598: sub exit_handler {
3599: my ($cmd, $tail, $client) = @_;
3600:
3601: my $userinput = "$cmd:$tail";
3602:
3603: &logthis("Client $clientip ($clientname) hanging up: $userinput");
3604: &Reply($client, "bye\n", $userinput);
3605: $client->shutdown(2); # shutdown the socket forcibly.
3606: $client->close();
3607:
3608: return 0;
3609: }
1.248 foxr 3610: ®ister_handler("exit", \&exit_handler, 0,1,1);
3611: ®ister_handler("init", \&exit_handler, 0,1,1);
3612: ®ister_handler("quit", \&exit_handler, 0,1,1);
3613:
3614: # Determine if auto-enrollment is enabled.
3615: # Note that the original had what I believe to be a defect.
3616: # The original returned 0 if the requestor was not a registerd client.
3617: # It should return "refused".
3618: # Formal Parameters:
3619: # $cmd - The command that invoked us.
3620: # $tail - The tail of the command (Extra command parameters.
3621: # $client - The socket open on the client that issued the request.
3622: # Returns:
3623: # 1 - Indicating processing should continue.
3624: #
3625: sub enrollment_enabled_handler {
3626: my ($cmd, $tail, $client) = @_;
3627: my $userinput = $cmd.":".$tail; # For logging purposes.
3628:
3629:
3630: my $cdom = split(/:/, $tail); # Domain we're asking about.
3631: my $outcome = &localenroll::run($cdom);
3632: &Reply($client, "$outcome\n", $userinput);
3633:
3634: return 1;
3635: }
3636: ®ister_handler("autorun", \&enrollment_enabled_handler, 0, 1, 0);
3637:
3638: # Get the official sections for which auto-enrollment is possible.
3639: # Since the admin people won't know about 'unofficial sections'
3640: # we cannot auto-enroll on them.
3641: # Formal Parameters:
3642: # $cmd - The command request that got us dispatched here.
3643: # $tail - The remainder of the request. In our case this
3644: # will be split into:
3645: # $coursecode - The course name from the admin point of view.
3646: # $cdom - The course's domain(?).
3647: # $client - Socket open on the client.
3648: # Returns:
3649: # 1 - Indiciting processing should continue.
3650: #
3651: sub get_sections_handler {
3652: my ($cmd, $tail, $client) = @_;
3653: my $userinput = "$cmd:$tail";
3654:
3655: my ($coursecode, $cdom) = split(/:/, $tail);
3656: my @secs = &localenroll::get_sections($coursecode,$cdom);
3657: my $seclist = &escape(join(':',@secs));
3658:
3659: &Reply($client, "$seclist\n", $userinput);
3660:
3661:
3662: return 1;
3663: }
3664: ®ister_handler("autogetsections", \&get_sections_handler, 0, 1, 0);
3665:
3666: # Validate the owner of a new course section.
3667: #
3668: # Formal Parameters:
3669: # $cmd - Command that got us dispatched.
3670: # $tail - the remainder of the command. For us this consists of a
3671: # colon separated string containing:
3672: # $inst - Course Id from the institutions point of view.
3673: # $owner - Proposed owner of the course.
3674: # $cdom - Domain of the course (from the institutions
3675: # point of view?)..
3676: # $client - Socket open on the client.
3677: #
3678: # Returns:
3679: # 1 - Processing should continue.
3680: #
3681: sub validate_course_owner_handler {
3682: my ($cmd, $tail, $client) = @_;
3683: my $userinput = "$cmd:$tail";
3684: my ($inst_course_id, $owner, $cdom) = split(/:/, $tail);
3685:
3686: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom);
3687: &Reply($client, "$outcome\n", $userinput);
3688:
3689:
3690:
3691: return 1;
3692: }
3693: ®ister_handler("autonewcourse", \&validate_course_owner_handler, 0, 1, 0);
1.263 albertel 3694:
1.248 foxr 3695: #
3696: # Validate a course section in the official schedule of classes
3697: # from the institutions point of view (part of autoenrollment).
3698: #
3699: # Formal Parameters:
3700: # $cmd - The command request that got us dispatched.
3701: # $tail - The tail of the command. In this case,
3702: # this is a colon separated set of words that will be split
3703: # into:
3704: # $inst_course_id - The course/section id from the
3705: # institutions point of view.
3706: # $cdom - The domain from the institutions
3707: # point of view.
3708: # $client - Socket open on the client.
3709: # Returns:
3710: # 1 - Indicating processing should continue.
3711: #
3712: sub validate_course_section_handler {
3713: my ($cmd, $tail, $client) = @_;
3714: my $userinput = "$cmd:$tail";
3715: my ($inst_course_id, $cdom) = split(/:/, $tail);
3716:
3717: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
3718: &Reply($client, "$outcome\n", $userinput);
3719:
3720:
3721: return 1;
3722: }
3723: ®ister_handler("autovalidatecourse", \&validate_course_section_handler, 0, 1, 0);
3724:
3725: #
3726: # Create a password for a new auto-enrollment user.
3727: # I think/guess, this password allows access to the institutions
3728: # AIS class list server/services. Stuart can correct this comment
3729: # when he finds out how wrong I am.
3730: #
3731: # Formal Parameters:
3732: # $cmd - The command request that got us dispatched.
3733: # $tail - The tail of the command. In this case this is a colon separated
3734: # set of words that will be split into:
3735: # $authparam - An authentication parameter (username??).
3736: # $cdom - The domain of the course from the institution's
3737: # point of view.
3738: # $client - The socket open on the client.
3739: # Returns:
3740: # 1 - continue processing.
3741: #
3742: sub create_auto_enroll_password_handler {
3743: my ($cmd, $tail, $client) = @_;
3744: my $userinput = "$cmd:$tail";
3745:
3746: my ($authparam, $cdom) = split(/:/, $userinput);
3747:
3748: my ($create_passwd,$authchk);
3749: ($authparam,
3750: $create_passwd,
3751: $authchk) = &localenroll::create_password($authparam,$cdom);
3752:
3753: &Reply($client, &escape($authparam.':'.$create_passwd.':'.$authchk)."\n",
3754: $userinput);
3755:
3756:
3757: return 1;
3758: }
3759: ®ister_handler("autocreatepassword", \&create_auto_enroll_password_handler,
3760: 0, 1, 0);
3761:
3762: # Retrieve and remove temporary files created by/during autoenrollment.
3763: #
3764: # Formal Parameters:
3765: # $cmd - The command that got us dispatched.
3766: # $tail - The tail of the command. In our case this is a colon
3767: # separated list that will be split into:
3768: # $filename - The name of the file to remove.
3769: # The filename is given as a path relative to
3770: # the LonCAPA temp file directory.
3771: # $client - Socket open on the client.
3772: #
3773: # Returns:
3774: # 1 - Continue processing.
3775: sub retrieve_auto_file_handler {
3776: my ($cmd, $tail, $client) = @_;
3777: my $userinput = "cmd:$tail";
3778:
3779: my ($filename) = split(/:/, $tail);
3780:
3781: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
3782: if ( (-e $source) && ($filename ne '') ) {
3783: my $reply = '';
3784: if (open(my $fh,$source)) {
3785: while (<$fh>) {
3786: chomp($_);
3787: $_ =~ s/^\s+//g;
3788: $_ =~ s/\s+$//g;
3789: $reply .= $_;
3790: }
3791: close($fh);
3792: &Reply($client, &escape($reply)."\n", $userinput);
3793:
3794: # Does this have to be uncommented??!? (RF).
3795: #
3796: # unlink($source);
3797: } else {
3798: &Failure($client, "error\n", $userinput);
3799: }
3800: } else {
3801: &Failure($client, "error\n", $userinput);
3802: }
3803:
3804:
3805: return 1;
3806: }
3807: ®ister_handler("autoretrieve", \&retrieve_auto_file_handler, 0,1,0);
3808:
3809: #
3810: # Read and retrieve institutional code format (for support form).
3811: # Formal Parameters:
3812: # $cmd - Command that dispatched us.
3813: # $tail - Tail of the command. In this case it conatins
3814: # the course domain and the coursename.
3815: # $client - Socket open on the client.
3816: # Returns:
3817: # 1 - Continue processing.
3818: #
3819: sub get_institutional_code_format_handler {
3820: my ($cmd, $tail, $client) = @_;
3821: my $userinput = "$cmd:$tail";
3822:
3823: my $reply;
3824: my($cdom,$course) = split(/:/,$tail);
3825: my @pairs = split/\&/,$course;
3826: my %instcodes = ();
3827: my %codes = ();
3828: my @codetitles = ();
3829: my %cat_titles = ();
3830: my %cat_order = ();
3831: foreach (@pairs) {
3832: my ($key,$value) = split/=/,$_;
3833: $instcodes{&unescape($key)} = &unescape($value);
3834: }
3835: my $formatreply = &localenroll::instcode_format($cdom,
3836: \%instcodes,
3837: \%codes,
3838: \@codetitles,
3839: \%cat_titles,
3840: \%cat_order);
3841: if ($formatreply eq 'ok') {
3842: my $codes_str = &hash2str(%codes);
3843: my $codetitles_str = &array2str(@codetitles);
3844: my $cat_titles_str = &hash2str(%cat_titles);
3845: my $cat_order_str = &hash2str(%cat_order);
3846: &Reply($client,
3847: $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'
3848: .$cat_order_str."\n",
3849: $userinput);
3850: } else {
3851: # this else branch added by RF since if not ok, lonc will
3852: # hang waiting on reply until timeout.
3853: #
3854: &Reply($client, "format_error\n", $userinput);
3855: }
3856:
3857: return 1;
3858: }
1.265 albertel 3859: ®ister_handler("autoinstcodeformat",
3860: \&get_institutional_code_format_handler,0,1,0);
1.246 foxr 3861:
1.265 albertel 3862: #
3863: # Gets a student's photo to exist (in the correct image type) in the user's
3864: # directory.
3865: # Formal Parameters:
3866: # $cmd - The command request that got us dispatched.
3867: # $tail - A colon separated set of words that will be split into:
3868: # $domain - student's domain
3869: # $uname - student username
3870: # $type - image type desired
3871: # $client - The socket open on the client.
3872: # Returns:
3873: # 1 - continue processing.
3874: sub student_photo_handler {
3875: my ($cmd, $tail, $client) = @_;
3876: my ($domain,$uname,$type) = split(/:/, $tail);
3877:
3878: my $path=&propath($domain,$uname).
3879: '/userfiles/internal/studentphoto.'.$type;
3880: if (-e $path) {
3881: &Reply($client,"ok\n","$cmd:$tail");
3882: return 1;
3883: }
3884: &mkpath($path);
3885: my $file=&localstudentphoto::fetch($domain,$uname);
3886: if (!$file) {
3887: &Failure($client,"unavailable\n","$cmd:$tail");
3888: return 1;
3889: }
3890: if (!-e $path) { &convert_photo($file,$path); }
3891: if (-e $path) {
3892: &Reply($client,"ok\n","$cmd:$tail");
3893: return 1;
3894: }
3895: &Failure($client,"unable_to_convert\n","$cmd:$tail");
3896: return 1;
3897: }
3898: ®ister_handler("studentphoto", \&student_photo_handler, 0, 1, 0);
1.246 foxr 3899:
1.264 albertel 3900: # mkpath makes all directories for a file, expects an absolute path with a
3901: # file or a trailing / if just a dir is passed
3902: # returns 1 on success 0 on failure
3903: sub mkpath {
3904: my ($file)=@_;
3905: my @parts=split(/\//,$file,-1);
3906: my $now=$parts[0].'/'.$parts[1].'/'.$parts[2];
3907: for (my $i=3;$i<= ($#parts-1);$i++) {
1.265 albertel 3908: $now.='/'.$parts[$i];
1.264 albertel 3909: if (!-e $now) {
3910: if (!mkdir($now,0770)) { return 0; }
3911: }
3912: }
3913: return 1;
3914: }
3915:
1.207 foxr 3916: #---------------------------------------------------------------
3917: #
3918: # Getting, decoding and dispatching requests:
3919: #
3920: #
3921: # Get a Request:
3922: # Gets a Request message from the client. The transaction
3923: # is defined as a 'line' of text. We remove the new line
3924: # from the text line.
1.226 foxr 3925: #
1.211 albertel 3926: sub get_request {
1.207 foxr 3927: my $input = <$client>;
3928: chomp($input);
1.226 foxr 3929:
1.234 foxr 3930: &Debug("get_request: Request = $input\n");
1.207 foxr 3931:
3932: &status('Processing '.$clientname.':'.$input);
3933:
3934: return $input;
3935: }
1.212 foxr 3936: #---------------------------------------------------------------
3937: #
3938: # Process a request. This sub should shrink as each action
3939: # gets farmed out into a separat sub that is registered
3940: # with the dispatch hash.
3941: #
3942: # Parameters:
3943: # user_input - The request received from the client (lonc).
3944: # Returns:
3945: # true to keep processing, false if caller should exit.
3946: #
3947: sub process_request {
3948: my ($userinput) = @_; # Easier for now to break style than to
3949: # fix all the userinput -> user_input.
3950: my $wasenc = 0; # True if request was encrypted.
3951: # ------------------------------------------------------------ See if encrypted
3952: if ($userinput =~ /^enc/) {
3953: $userinput = decipher($userinput);
3954: $wasenc=1;
3955: if(!$userinput) { # Cipher not defined.
1.251 foxr 3956: &Failure($client, "error: Encrypted data without negotated key\n");
1.212 foxr 3957: return 0;
3958: }
3959: }
3960: Debug("process_request: $userinput\n");
3961:
1.213 foxr 3962: #
3963: # The 'correct way' to add a command to lond is now to
3964: # write a sub to execute it and Add it to the command dispatch
3965: # hash via a call to register_handler.. The comments to that
3966: # sub should give you enough to go on to show how to do this
3967: # along with the examples that are building up as this code
3968: # is getting refactored. Until all branches of the
3969: # if/elseif monster below have been factored out into
3970: # separate procesor subs, if the dispatch hash is missing
3971: # the command keyword, we will fall through to the remainder
3972: # of the if/else chain below in order to keep this thing in
3973: # working order throughout the transmogrification.
3974:
3975: my ($command, $tail) = split(/:/, $userinput, 2);
3976: chomp($command);
3977: chomp($tail);
3978: $tail =~ s/(\r)//; # This helps people debugging with e.g. telnet.
1.214 foxr 3979: $command =~ s/(\r)//; # And this too for parameterless commands.
3980: if(!$tail) {
3981: $tail =""; # defined but blank.
3982: }
1.213 foxr 3983:
3984: &Debug("Command received: $command, encoded = $wasenc");
3985:
3986: if(defined $Dispatcher{$command}) {
3987:
3988: my $dispatch_info = $Dispatcher{$command};
3989: my $handler = $$dispatch_info[0];
3990: my $need_encode = $$dispatch_info[1];
3991: my $client_types = $$dispatch_info[2];
3992: Debug("Matched dispatch hash: mustencode: $need_encode "
3993: ."ClientType $client_types");
3994:
3995: # Validate the request:
3996:
3997: my $ok = 1;
3998: my $requesterprivs = 0;
3999: if(&isClient()) {
4000: $requesterprivs |= $CLIENT_OK;
4001: }
4002: if(&isManager()) {
4003: $requesterprivs |= $MANAGER_OK;
4004: }
4005: if($need_encode && (!$wasenc)) {
4006: Debug("Must encode but wasn't: $need_encode $wasenc");
4007: $ok = 0;
4008: }
4009: if(($client_types & $requesterprivs) == 0) {
4010: Debug("Client not privileged to do this operation");
4011: $ok = 0;
4012: }
4013:
4014: if($ok) {
4015: Debug("Dispatching to handler $command $tail");
4016: my $keep_going = &$handler($command, $tail, $client);
4017: return $keep_going;
4018: } else {
4019: Debug("Refusing to dispatch because client did not match requirements");
4020: Failure($client, "refused\n", $userinput);
4021: return 1;
4022: }
4023:
4024: }
4025:
1.262 foxr 4026: print $client "unknown_cmd\n";
1.212 foxr 4027: # -------------------------------------------------------------------- complete
4028: Debug("process_request - returning 1");
4029: return 1;
4030: }
1.207 foxr 4031: #
4032: # Decipher encoded traffic
4033: # Parameters:
4034: # input - Encoded data.
4035: # Returns:
4036: # Decoded data or undef if encryption key was not yet negotiated.
4037: # Implicit input:
4038: # cipher - This global holds the negotiated encryption key.
4039: #
1.211 albertel 4040: sub decipher {
1.207 foxr 4041: my ($input) = @_;
4042: my $output = '';
1.212 foxr 4043:
4044:
1.207 foxr 4045: if($cipher) {
4046: my($enc, $enclength, $encinput) = split(/:/, $input);
4047: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
4048: $output .=
4049: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
4050: }
4051: return substr($output, 0, $enclength);
4052: } else {
4053: return undef;
4054: }
4055: }
4056:
4057: #
4058: # Register a command processor. This function is invoked to register a sub
4059: # to process a request. Once registered, the ProcessRequest sub can automatically
4060: # dispatch requests to an appropriate sub, and do the top level validity checking
4061: # as well:
4062: # - Is the keyword recognized.
4063: # - Is the proper client type attempting the request.
4064: # - Is the request encrypted if it has to be.
4065: # Parameters:
4066: # $request_name - Name of the request being registered.
4067: # This is the command request that will match
4068: # against the hash keywords to lookup the information
4069: # associated with the dispatch information.
4070: # $procedure - Reference to a sub to call to process the request.
4071: # All subs get called as follows:
4072: # Procedure($cmd, $tail, $replyfd, $key)
4073: # $cmd - the actual keyword that invoked us.
4074: # $tail - the tail of the request that invoked us.
4075: # $replyfd- File descriptor connected to the client
4076: # $must_encode - True if the request must be encoded to be good.
4077: # $client_ok - True if it's ok for a client to request this.
4078: # $manager_ok - True if it's ok for a manager to request this.
4079: # Side effects:
4080: # - On success, the Dispatcher hash has an entry added for the key $RequestName
4081: # - On failure, the program will die as it's a bad internal bug to try to
4082: # register a duplicate command handler.
4083: #
1.211 albertel 4084: sub register_handler {
1.212 foxr 4085: my ($request_name,$procedure,$must_encode, $client_ok,$manager_ok) = @_;
1.207 foxr 4086:
4087: # Don't allow duplication#
4088:
4089: if (defined $Dispatcher{$request_name}) {
4090: die "Attempting to define a duplicate request handler for $request_name\n";
4091: }
4092: # Build the client type mask:
4093:
4094: my $client_type_mask = 0;
4095: if($client_ok) {
4096: $client_type_mask |= $CLIENT_OK;
4097: }
4098: if($manager_ok) {
4099: $client_type_mask |= $MANAGER_OK;
4100: }
4101:
4102: # Enter the hash:
4103:
4104: my @entry = ($procedure, $must_encode, $client_type_mask);
4105:
4106: $Dispatcher{$request_name} = \@entry;
4107:
4108: }
4109:
4110:
4111: #------------------------------------------------------------------
4112:
4113:
4114:
4115:
1.141 foxr 4116: #
1.96 foxr 4117: # Convert an error return code from lcpasswd to a string value.
4118: #
4119: sub lcpasswdstrerror {
4120: my $ErrorCode = shift;
1.97 foxr 4121: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
1.96 foxr 4122: return "lcpasswd Unrecognized error return value ".$ErrorCode;
4123: } else {
1.98 foxr 4124: return $passwderrors[$ErrorCode];
1.96 foxr 4125: }
4126: }
4127:
1.97 foxr 4128: #
4129: # Convert an error return code from lcuseradd to a string value:
4130: #
4131: sub lcuseraddstrerror {
4132: my $ErrorCode = shift;
4133: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
4134: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
4135: } else {
1.98 foxr 4136: return $adderrors[$ErrorCode];
1.97 foxr 4137: }
4138: }
4139:
1.23 harris41 4140: # grabs exception and records it to log before exiting
4141: sub catchexception {
1.27 albertel 4142: my ($error)=@_;
1.25 www 4143: $SIG{'QUIT'}='DEFAULT';
4144: $SIG{__DIE__}='DEFAULT';
1.165 albertel 4145: &status("Catching exception");
1.190 albertel 4146: &logthis("<font color='red'>CRITICAL: "
1.134 albertel 4147: ."ABNORMAL EXIT. Child $$ for server $thisserver died through "
1.27 albertel 4148: ."a crash with this error msg->[$error]</font>");
1.57 www 4149: &logthis('Famous last words: '.$status.' - '.$lastlog);
1.27 albertel 4150: if ($client) { print $client "error: $error\n"; }
1.59 www 4151: $server->close();
1.27 albertel 4152: die($error);
1.23 harris41 4153: }
1.63 www 4154: sub timeout {
1.165 albertel 4155: &status("Handling Timeout");
1.190 albertel 4156: &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
1.63 www 4157: &catchexception('Timeout');
4158: }
1.22 harris41 4159: # -------------------------------- Set signal handlers to record abnormal exits
4160:
1.226 foxr 4161:
1.22 harris41 4162: $SIG{'QUIT'}=\&catchexception;
4163: $SIG{__DIE__}=\&catchexception;
4164:
1.81 matthew 4165: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
1.95 harris41 4166: &status("Read loncapa.conf and loncapa_apache.conf");
4167: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
1.141 foxr 4168: %perlvar=%{$perlvarref};
1.80 harris41 4169: undef $perlvarref;
1.19 www 4170:
1.35 harris41 4171: # ----------------------------- Make sure this process is running from user=www
4172: my $wwwid=getpwnam('www');
4173: if ($wwwid!=$<) {
1.134 albertel 4174: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
4175: my $subj="LON: $currenthostid User ID mismatch";
1.37 harris41 4176: system("echo 'User ID mismatch. lond must be run as user www.' |\
1.35 harris41 4177: mailto $emailto -s '$subj' > /dev/null");
4178: exit 1;
4179: }
4180:
1.19 www 4181: # --------------------------------------------- Check if other instance running
4182:
4183: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
4184:
4185: if (-e $pidfile) {
4186: my $lfh=IO::File->new("$pidfile");
4187: my $pide=<$lfh>;
4188: chomp($pide);
1.29 harris41 4189: if (kill 0 => $pide) { die "already running"; }
1.19 www 4190: }
1.1 albertel 4191:
4192: # ------------------------------------------------------------- Read hosts file
4193:
4194:
4195:
4196: # establish SERVER socket, bind and listen.
4197: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
4198: Type => SOCK_STREAM,
4199: Proto => 'tcp',
4200: Reuse => 1,
4201: Listen => 10 )
1.29 harris41 4202: or die "making socket: $@\n";
1.1 albertel 4203:
4204: # --------------------------------------------------------- Do global variables
4205:
4206: # global variables
4207:
1.134 albertel 4208: my %children = (); # keys are current child process IDs
1.1 albertel 4209:
4210: sub REAPER { # takes care of dead children
4211: $SIG{CHLD} = \&REAPER;
1.165 albertel 4212: &status("Handling child death");
1.178 foxr 4213: my $pid;
4214: do {
4215: $pid = waitpid(-1,&WNOHANG());
4216: if (defined($children{$pid})) {
4217: &logthis("Child $pid died");
4218: delete($children{$pid});
1.183 albertel 4219: } elsif ($pid > 0) {
1.178 foxr 4220: &logthis("Unknown Child $pid died");
4221: }
4222: } while ( $pid > 0 );
4223: foreach my $child (keys(%children)) {
4224: $pid = waitpid($child,&WNOHANG());
4225: if ($pid > 0) {
4226: &logthis("Child $child - $pid looks like we missed it's death");
4227: delete($children{$pid});
4228: }
1.176 albertel 4229: }
1.165 albertel 4230: &status("Finished Handling child death");
1.1 albertel 4231: }
4232:
4233: sub HUNTSMAN { # signal handler for SIGINT
1.165 albertel 4234: &status("Killing children (INT)");
1.1 albertel 4235: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
4236: kill 'INT' => keys %children;
1.59 www 4237: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.1 albertel 4238: my $execdir=$perlvar{'lonDaemons'};
4239: unlink("$execdir/logs/lond.pid");
1.190 albertel 4240: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
1.165 albertel 4241: &status("Done killing children");
1.1 albertel 4242: exit; # clean up with dignity
4243: }
4244:
4245: sub HUPSMAN { # signal handler for SIGHUP
4246: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
1.165 albertel 4247: &status("Killing children for restart (HUP)");
1.1 albertel 4248: kill 'INT' => keys %children;
1.59 www 4249: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.190 albertel 4250: &logthis("<font color='red'>CRITICAL: Restarting</font>");
1.134 albertel 4251: my $execdir=$perlvar{'lonDaemons'};
1.30 harris41 4252: unlink("$execdir/logs/lond.pid");
1.165 albertel 4253: &status("Restarting self (HUP)");
1.1 albertel 4254: exec("$execdir/lond"); # here we go again
4255: }
4256:
1.144 foxr 4257: #
1.148 foxr 4258: # Kill off hashes that describe the host table prior to re-reading it.
4259: # Hashes affected are:
1.200 matthew 4260: # %hostid, %hostdom %hostip %hostdns.
1.148 foxr 4261: #
4262: sub KillHostHashes {
4263: foreach my $key (keys %hostid) {
4264: delete $hostid{$key};
4265: }
4266: foreach my $key (keys %hostdom) {
4267: delete $hostdom{$key};
4268: }
4269: foreach my $key (keys %hostip) {
4270: delete $hostip{$key};
4271: }
1.200 matthew 4272: foreach my $key (keys %hostdns) {
4273: delete $hostdns{$key};
4274: }
1.148 foxr 4275: }
4276: #
4277: # Read in the host table from file and distribute it into the various hashes:
4278: #
4279: # - %hostid - Indexed by IP, the loncapa hostname.
4280: # - %hostdom - Indexed by loncapa hostname, the domain.
4281: # - %hostip - Indexed by hostid, the Ip address of the host.
4282: sub ReadHostTable {
4283:
4284: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
1.200 matthew 4285: my $myloncapaname = $perlvar{'lonHostID'};
4286: Debug("My loncapa name is : $myloncapaname");
1.148 foxr 4287: while (my $configline=<CONFIG>) {
1.178 foxr 4288: if (!($configline =~ /^\s*\#/)) {
4289: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
4290: chomp($ip); $ip=~s/\D+$//;
1.200 matthew 4291: $hostid{$ip}=$id; # LonCAPA name of host by IP.
4292: $hostdom{$id}=$domain; # LonCAPA domain name of host.
4293: $hostip{$id}=$ip; # IP address of host.
4294: $hostdns{$name} = $id; # LonCAPA name of host by DNS.
4295:
4296: if ($id eq $perlvar{'lonHostID'}) {
4297: Debug("Found me in the host table: $name");
4298: $thisserver=$name;
4299: }
1.178 foxr 4300: }
1.148 foxr 4301: }
4302: close(CONFIG);
4303: }
4304: #
4305: # Reload the Apache daemon's state.
1.150 foxr 4306: # This is done by invoking /home/httpd/perl/apachereload
4307: # a setuid perl script that can be root for us to do this job.
1.148 foxr 4308: #
4309: sub ReloadApache {
1.150 foxr 4310: my $execdir = $perlvar{'lonDaemons'};
4311: my $script = $execdir."/apachereload";
4312: system($script);
1.148 foxr 4313: }
4314:
4315: #
1.144 foxr 4316: # Called in response to a USR2 signal.
4317: # - Reread hosts.tab
4318: # - All children connected to hosts that were removed from hosts.tab
4319: # are killed via SIGINT
4320: # - All children connected to previously existing hosts are sent SIGUSR1
4321: # - Our internal hosts hash is updated to reflect the new contents of
4322: # hosts.tab causing connections from hosts added to hosts.tab to
4323: # now be honored.
4324: #
4325: sub UpdateHosts {
1.165 albertel 4326: &status("Reload hosts.tab");
1.147 foxr 4327: logthis('<font color="blue"> Updating connections </font>');
1.148 foxr 4328: #
4329: # The %children hash has the set of IP's we currently have children
4330: # on. These need to be matched against records in the hosts.tab
4331: # Any ip's no longer in the table get killed off they correspond to
4332: # either dropped or changed hosts. Note that the re-read of the table
4333: # will take care of new and changed hosts as connections come into being.
4334:
4335:
4336: KillHostHashes;
4337: ReadHostTable;
4338:
4339: foreach my $child (keys %children) {
4340: my $childip = $children{$child};
4341: if(!$hostid{$childip}) {
1.149 foxr 4342: logthis('<font color="blue"> UpdateHosts killing child '
4343: ." $child for ip $childip </font>");
1.148 foxr 4344: kill('INT', $child);
1.149 foxr 4345: } else {
4346: logthis('<font color="green"> keeping child for ip '
4347: ." $childip (pid=$child) </font>");
1.148 foxr 4348: }
4349: }
4350: ReloadApache;
1.165 albertel 4351: &status("Finished reloading hosts.tab");
1.144 foxr 4352: }
4353:
1.148 foxr 4354:
1.57 www 4355: sub checkchildren {
1.165 albertel 4356: &status("Checking on the children (sending signals)");
1.57 www 4357: &initnewstatus();
4358: &logstatus();
4359: &logthis('Going to check on the children');
1.134 albertel 4360: my $docdir=$perlvar{'lonDocRoot'};
1.61 harris41 4361: foreach (sort keys %children) {
1.221 albertel 4362: #sleep 1;
1.57 www 4363: unless (kill 'USR1' => $_) {
4364: &logthis ('Child '.$_.' is dead');
4365: &logstatus($$.' is dead');
1.221 albertel 4366: delete($children{$_});
1.57 www 4367: }
1.61 harris41 4368: }
1.63 www 4369: sleep 5;
1.212 foxr 4370: $SIG{ALRM} = sub { Debug("timeout");
4371: die "timeout"; };
1.113 albertel 4372: $SIG{__DIE__} = 'DEFAULT';
1.165 albertel 4373: &status("Checking on the children (waiting for reports)");
1.63 www 4374: foreach (sort keys %children) {
4375: unless (-e "$docdir/lon-status/londchld/$_.txt") {
1.113 albertel 4376: eval {
4377: alarm(300);
1.63 www 4378: &logthis('Child '.$_.' did not respond');
1.67 albertel 4379: kill 9 => $_;
1.131 albertel 4380: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
4381: #$subj="LON: $currenthostid killed lond process $_";
4382: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
4383: #$execdir=$perlvar{'lonDaemons'};
4384: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
1.221 albertel 4385: delete($children{$_});
1.113 albertel 4386: alarm(0);
4387: }
1.63 www 4388: }
4389: }
1.113 albertel 4390: $SIG{ALRM} = 'DEFAULT';
1.155 albertel 4391: $SIG{__DIE__} = \&catchexception;
1.165 albertel 4392: &status("Finished checking children");
1.221 albertel 4393: &logthis('Finished Checking children');
1.57 www 4394: }
4395:
1.1 albertel 4396: # --------------------------------------------------------------------- Logging
4397:
4398: sub logthis {
4399: my $message=shift;
4400: my $execdir=$perlvar{'lonDaemons'};
4401: my $fh=IO::File->new(">>$execdir/logs/lond.log");
4402: my $now=time;
4403: my $local=localtime($now);
1.58 www 4404: $lastlog=$local.': '.$message;
1.1 albertel 4405: print $fh "$local ($$): $message\n";
4406: }
4407:
1.77 foxr 4408: # ------------------------- Conditional log if $DEBUG true.
4409: sub Debug {
4410: my $message = shift;
4411: if($DEBUG) {
4412: &logthis($message);
4413: }
4414: }
1.161 foxr 4415:
4416: #
4417: # Sub to do replies to client.. this gives a hook for some
4418: # debug tracing too:
4419: # Parameters:
4420: # fd - File open on client.
4421: # reply - Text to send to client.
4422: # request - Original request from client.
4423: #
4424: sub Reply {
1.192 foxr 4425: my ($fd, $reply, $request) = @_;
1.161 foxr 4426: print $fd $reply;
4427: Debug("Request was $request Reply was $reply");
4428:
1.212 foxr 4429: $Transactions++;
4430:
4431:
4432: }
4433:
4434:
4435: #
4436: # Sub to report a failure.
4437: # This function:
4438: # - Increments the failure statistic counters.
4439: # - Invokes Reply to send the error message to the client.
4440: # Parameters:
4441: # fd - File descriptor open on the client
4442: # reply - Reply text to emit.
4443: # request - The original request message (used by Reply
4444: # to debug if that's enabled.
4445: # Implicit outputs:
4446: # $Failures- The number of failures is incremented.
4447: # Reply (invoked here) sends a message to the
4448: # client:
4449: #
4450: sub Failure {
4451: my $fd = shift;
4452: my $reply = shift;
4453: my $request = shift;
4454:
4455: $Failures++;
4456: Reply($fd, $reply, $request); # That's simple eh?
1.161 foxr 4457: }
1.57 www 4458: # ------------------------------------------------------------------ Log status
4459:
4460: sub logstatus {
1.178 foxr 4461: &status("Doing logging");
4462: my $docdir=$perlvar{'lonDocRoot'};
4463: {
4464: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
1.200 matthew 4465: print $fh $status."\n".$lastlog."\n".time."\n$keymode";
1.178 foxr 4466: $fh->close();
4467: }
1.221 albertel 4468: &status("Finished $$.txt");
4469: {
4470: open(LOG,">>$docdir/lon-status/londstatus.txt");
4471: flock(LOG,LOCK_EX);
4472: print LOG $$."\t".$clientname."\t".$currenthostid."\t"
4473: .$status."\t".$lastlog."\t $keymode\n";
4474: flock(DB,LOCK_UN);
4475: close(LOG);
4476: }
1.178 foxr 4477: &status("Finished logging");
1.57 www 4478: }
4479:
4480: sub initnewstatus {
4481: my $docdir=$perlvar{'lonDocRoot'};
4482: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
4483: my $now=time;
4484: my $local=localtime($now);
4485: print $fh "LOND status $local - parent $$\n\n";
1.64 www 4486: opendir(DIR,"$docdir/lon-status/londchld");
1.134 albertel 4487: while (my $filename=readdir(DIR)) {
1.64 www 4488: unlink("$docdir/lon-status/londchld/$filename");
4489: }
4490: closedir(DIR);
1.57 www 4491: }
4492:
4493: # -------------------------------------------------------------- Status setting
4494:
4495: sub status {
4496: my $what=shift;
4497: my $now=time;
4498: my $local=localtime($now);
1.178 foxr 4499: $status=$local.': '.$what;
4500: $0='lond: '.$what.' '.$local;
1.57 www 4501: }
1.11 www 4502:
4503: # -------------------------------------------------------- Escape Special Chars
4504:
4505: sub escape {
4506: my $str=shift;
4507: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
4508: return $str;
4509: }
4510:
4511: # ----------------------------------------------------- Un-Escape Special Chars
4512:
4513: sub unescape {
4514: my $str=shift;
4515: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
4516: return $str;
4517: }
4518:
1.1 albertel 4519: # ----------------------------------------------------------- Send USR1 to lonc
4520:
4521: sub reconlonc {
4522: my $peerfile=shift;
4523: &logthis("Trying to reconnect for $peerfile");
4524: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
4525: if (my $fh=IO::File->new("$loncfile")) {
4526: my $loncpid=<$fh>;
4527: chomp($loncpid);
4528: if (kill 0 => $loncpid) {
4529: &logthis("lonc at pid $loncpid responding, sending USR1");
4530: kill USR1 => $loncpid;
4531: } else {
1.9 www 4532: &logthis(
1.190 albertel 4533: "<font color='red'>CRITICAL: "
1.9 www 4534: ."lonc at pid $loncpid not responding, giving up</font>");
1.1 albertel 4535: }
4536: } else {
1.190 albertel 4537: &logthis('<font color="red">CRITICAL: lonc not running, giving up</font>');
1.1 albertel 4538: }
4539: }
4540:
4541: # -------------------------------------------------- Non-critical communication
1.11 www 4542:
1.1 albertel 4543: sub subreply {
4544: my ($cmd,$server)=@_;
4545: my $peerfile="$perlvar{'lonSockDir'}/$server";
4546: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
4547: Type => SOCK_STREAM,
4548: Timeout => 10)
4549: or return "con_lost";
4550: print $sclient "$cmd\n";
4551: my $answer=<$sclient>;
4552: chomp($answer);
4553: if (!$answer) { $answer="con_lost"; }
4554: return $answer;
4555: }
4556:
4557: sub reply {
4558: my ($cmd,$server)=@_;
4559: my $answer;
1.115 albertel 4560: if ($server ne $currenthostid) {
1.1 albertel 4561: $answer=subreply($cmd,$server);
4562: if ($answer eq 'con_lost') {
4563: $answer=subreply("ping",$server);
4564: if ($answer ne $server) {
1.115 albertel 4565: &logthis("sub reply: answer != server answer is $answer, server is $server");
1.1 albertel 4566: &reconlonc("$perlvar{'lonSockDir'}/$server");
4567: }
4568: $answer=subreply($cmd,$server);
4569: }
4570: } else {
4571: $answer='self_reply';
4572: }
4573: return $answer;
4574: }
4575:
1.13 www 4576: # -------------------------------------------------------------- Talk to lonsql
4577:
1.234 foxr 4578: sub sql_reply {
1.12 harris41 4579: my ($cmd)=@_;
1.234 foxr 4580: my $answer=&sub_sql_reply($cmd);
4581: if ($answer eq 'con_lost') { $answer=&sub_sql_reply($cmd); }
1.12 harris41 4582: return $answer;
4583: }
4584:
1.234 foxr 4585: sub sub_sql_reply {
1.12 harris41 4586: my ($cmd)=@_;
4587: my $unixsock="mysqlsock";
4588: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
4589: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
4590: Type => SOCK_STREAM,
4591: Timeout => 10)
4592: or return "con_lost";
4593: print $sclient "$cmd\n";
4594: my $answer=<$sclient>;
4595: chomp($answer);
4596: if (!$answer) { $answer="con_lost"; }
4597: return $answer;
4598: }
4599:
1.1 albertel 4600: # -------------------------------------------- Return path to profile directory
1.11 www 4601:
1.1 albertel 4602: sub propath {
4603: my ($udom,$uname)=@_;
4604: $udom=~s/\W//g;
4605: $uname=~s/\W//g;
1.16 www 4606: my $subdir=$uname.'__';
1.1 albertel 4607: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
4608: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
4609: return $proname;
4610: }
4611:
4612: # --------------------------------------- Is this the home server of an author?
1.11 www 4613:
1.1 albertel 4614: sub ishome {
4615: my $author=shift;
4616: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
4617: my ($udom,$uname)=split(/\//,$author);
4618: my $proname=propath($udom,$uname);
4619: if (-e $proname) {
4620: return 'owner';
4621: } else {
4622: return 'not_owner';
4623: }
4624: }
4625:
4626: # ======================================================= Continue main program
4627: # ---------------------------------------------------- Fork once and dissociate
4628:
1.134 albertel 4629: my $fpid=fork;
1.1 albertel 4630: exit if $fpid;
1.29 harris41 4631: die "Couldn't fork: $!" unless defined ($fpid);
1.1 albertel 4632:
1.29 harris41 4633: POSIX::setsid() or die "Can't start new session: $!";
1.1 albertel 4634:
4635: # ------------------------------------------------------- Write our PID on disk
4636:
1.134 albertel 4637: my $execdir=$perlvar{'lonDaemons'};
1.1 albertel 4638: open (PIDSAVE,">$execdir/logs/lond.pid");
4639: print PIDSAVE "$$\n";
4640: close(PIDSAVE);
1.190 albertel 4641: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
1.57 www 4642: &status('Starting');
1.1 albertel 4643:
1.106 foxr 4644:
1.1 albertel 4645:
4646: # ----------------------------------------------------- Install signal handlers
4647:
1.57 www 4648:
1.1 albertel 4649: $SIG{CHLD} = \&REAPER;
4650: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
4651: $SIG{HUP} = \&HUPSMAN;
1.57 www 4652: $SIG{USR1} = \&checkchildren;
1.144 foxr 4653: $SIG{USR2} = \&UpdateHosts;
1.106 foxr 4654:
1.148 foxr 4655: # Read the host hashes:
4656:
4657: ReadHostTable;
1.106 foxr 4658:
4659: # --------------------------------------------------------------
4660: # Accept connections. When a connection comes in, it is validated
4661: # and if good, a child process is created to process transactions
4662: # along the connection.
4663:
1.1 albertel 4664: while (1) {
1.165 albertel 4665: &status('Starting accept');
1.106 foxr 4666: $client = $server->accept() or next;
1.165 albertel 4667: &status('Accepted '.$client.' off to spawn');
1.106 foxr 4668: make_new_child($client);
1.165 albertel 4669: &status('Finished spawning');
1.1 albertel 4670: }
4671:
1.212 foxr 4672: sub make_new_child {
4673: my $pid;
4674: # my $cipher; # Now global
4675: my $sigset;
1.178 foxr 4676:
1.212 foxr 4677: $client = shift;
4678: &status('Starting new child '.$client);
4679: &logthis('<font color="green"> Attempting to start child ('.$client.
4680: ")</font>");
4681: # block signal for fork
4682: $sigset = POSIX::SigSet->new(SIGINT);
4683: sigprocmask(SIG_BLOCK, $sigset)
4684: or die "Can't block SIGINT for fork: $!\n";
1.178 foxr 4685:
1.212 foxr 4686: die "fork: $!" unless defined ($pid = fork);
1.178 foxr 4687:
1.212 foxr 4688: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
4689: # connection liveness.
1.178 foxr 4690:
1.212 foxr 4691: #
4692: # Figure out who we're talking to so we can record the peer in
4693: # the pid hash.
4694: #
4695: my $caller = getpeername($client);
4696: my ($port,$iaddr);
4697: if (defined($caller) && length($caller) > 0) {
4698: ($port,$iaddr)=unpack_sockaddr_in($caller);
4699: } else {
4700: &logthis("Unable to determine who caller was, getpeername returned nothing");
4701: }
4702: if (defined($iaddr)) {
4703: $clientip = inet_ntoa($iaddr);
4704: Debug("Connected with $clientip");
4705: $clientdns = gethostbyaddr($iaddr, AF_INET);
4706: Debug("Connected with $clientdns by name");
4707: } else {
4708: &logthis("Unable to determine clientip");
4709: $clientip='Unavailable';
4710: }
4711:
4712: if ($pid) {
4713: # Parent records the child's birth and returns.
4714: sigprocmask(SIG_UNBLOCK, $sigset)
4715: or die "Can't unblock SIGINT for fork: $!\n";
4716: $children{$pid} = $clientip;
4717: &status('Started child '.$pid);
4718: return;
4719: } else {
4720: # Child can *not* return from this subroutine.
4721: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
4722: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
4723: #don't get intercepted
4724: $SIG{USR1}= \&logstatus;
4725: $SIG{ALRM}= \&timeout;
4726: $lastlog='Forked ';
4727: $status='Forked';
1.178 foxr 4728:
1.212 foxr 4729: # unblock signals
4730: sigprocmask(SIG_UNBLOCK, $sigset)
4731: or die "Can't unblock SIGINT for fork: $!\n";
1.178 foxr 4732:
1.212 foxr 4733: # my $tmpsnum=0; # Now global
4734: #---------------------------------------------------- kerberos 5 initialization
4735: &Authen::Krb5::init_context();
4736: &Authen::Krb5::init_ets();
1.209 albertel 4737:
1.212 foxr 4738: &status('Accepted connection');
4739: # =============================================================================
4740: # do something with the connection
4741: # -----------------------------------------------------------------------------
4742: # see if we know client and 'check' for spoof IP by ineffective challenge
1.178 foxr 4743:
1.212 foxr 4744: ReadManagerTable; # May also be a manager!!
4745:
4746: my $clientrec=($hostid{$clientip} ne undef);
4747: my $ismanager=($managers{$clientip} ne undef);
4748: $clientname = "[unknonwn]";
4749: if($clientrec) { # Establish client type.
4750: $ConnectionType = "client";
4751: $clientname = $hostid{$clientip};
4752: if($ismanager) {
4753: $ConnectionType = "both";
4754: }
4755: } else {
4756: $ConnectionType = "manager";
4757: $clientname = $managers{$clientip};
4758: }
4759: my $clientok;
1.178 foxr 4760:
1.212 foxr 4761: if ($clientrec || $ismanager) {
4762: &status("Waiting for init from $clientip $clientname");
4763: &logthis('<font color="yellow">INFO: Connection, '.
4764: $clientip.
4765: " ($clientname) connection type = $ConnectionType </font>" );
4766: &status("Connecting $clientip ($clientname))");
4767: my $remotereq=<$client>;
4768: chomp($remotereq);
4769: Debug("Got init: $remotereq");
4770: my $inikeyword = split(/:/, $remotereq);
4771: if ($remotereq =~ /^init/) {
4772: &sethost("sethost:$perlvar{'lonHostID'}");
4773: #
4774: # If the remote is attempting a local init... give that a try:
4775: #
4776: my ($i, $inittype) = split(/:/, $remotereq);
1.209 albertel 4777:
1.212 foxr 4778: # If the connection type is ssl, but I didn't get my
4779: # certificate files yet, then I'll drop back to
4780: # insecure (if allowed).
4781:
4782: if($inittype eq "ssl") {
4783: my ($ca, $cert) = lonssl::CertificateFile;
4784: my $kfile = lonssl::KeyFile;
4785: if((!$ca) ||
4786: (!$cert) ||
4787: (!$kfile)) {
4788: $inittype = ""; # This forces insecure attempt.
4789: &logthis("<font color=\"blue\"> Certificates not "
4790: ."installed -- trying insecure auth</font>");
1.224 foxr 4791: } else { # SSL certificates are in place so
1.212 foxr 4792: } # Leave the inittype alone.
4793: }
4794:
4795: if($inittype eq "local") {
4796: my $key = LocalConnection($client, $remotereq);
4797: if($key) {
4798: Debug("Got local key $key");
4799: $clientok = 1;
4800: my $cipherkey = pack("H32", $key);
4801: $cipher = new IDEA($cipherkey);
4802: print $client "ok:local\n";
4803: &logthis('<font color="green"'
4804: . "Successful local authentication </font>");
4805: $keymode = "local"
1.178 foxr 4806: } else {
1.212 foxr 4807: Debug("Failed to get local key");
4808: $clientok = 0;
4809: shutdown($client, 3);
4810: close $client;
1.178 foxr 4811: }
1.212 foxr 4812: } elsif ($inittype eq "ssl") {
4813: my $key = SSLConnection($client);
4814: if ($key) {
4815: $clientok = 1;
4816: my $cipherkey = pack("H32", $key);
4817: $cipher = new IDEA($cipherkey);
4818: &logthis('<font color="green">'
4819: ."Successfull ssl authentication with $clientname </font>");
4820: $keymode = "ssl";
4821:
1.178 foxr 4822: } else {
1.212 foxr 4823: $clientok = 0;
4824: close $client;
1.178 foxr 4825: }
1.212 foxr 4826:
4827: } else {
4828: my $ok = InsecureConnection($client);
4829: if($ok) {
4830: $clientok = 1;
4831: &logthis('<font color="green">'
4832: ."Successful insecure authentication with $clientname </font>");
4833: print $client "ok\n";
4834: $keymode = "insecure";
1.178 foxr 4835: } else {
1.212 foxr 4836: &logthis('<font color="yellow">'
4837: ."Attempted insecure connection disallowed </font>");
4838: close $client;
4839: $clientok = 0;
1.178 foxr 4840:
4841: }
4842: }
1.212 foxr 4843: } else {
4844: &logthis(
4845: "<font color='blue'>WARNING: "
4846: ."$clientip failed to initialize: >$remotereq< </font>");
4847: &status('No init '.$clientip);
4848: }
4849:
4850: } else {
4851: &logthis(
4852: "<font color='blue'>WARNING: Unknown client $clientip</font>");
4853: &status('Hung up on '.$clientip);
4854: }
4855:
4856: if ($clientok) {
4857: # ---------------- New known client connecting, could mean machine online again
4858:
4859: foreach my $id (keys(%hostip)) {
4860: if ($hostip{$id} ne $clientip ||
4861: $hostip{$currenthostid} eq $clientip) {
4862: # no need to try to do recon's to myself
4863: next;
4864: }
4865: &reconlonc("$perlvar{'lonSockDir'}/$id");
4866: }
4867: &logthis("<font color='green'>Established connection: $clientname</font>");
4868: &status('Will listen to '.$clientname);
4869: # ------------------------------------------------------------ Process requests
4870: my $keep_going = 1;
4871: my $user_input;
4872: while(($user_input = get_request) && $keep_going) {
4873: alarm(120);
4874: Debug("Main: Got $user_input\n");
4875: $keep_going = &process_request($user_input);
1.178 foxr 4876: alarm(0);
1.212 foxr 4877: &status('Listening to '.$clientname." ($keymode)");
1.161 foxr 4878: }
1.212 foxr 4879:
1.59 www 4880: # --------------------------------------------- client unknown or fishy, refuse
1.212 foxr 4881: } else {
1.161 foxr 4882: print $client "refused\n";
4883: $client->close();
1.190 albertel 4884: &logthis("<font color='blue'>WARNING: "
1.161 foxr 4885: ."Rejected client $clientip, closing connection</font>");
4886: }
1.212 foxr 4887: }
1.161 foxr 4888:
1.1 albertel 4889: # =============================================================================
1.161 foxr 4890:
1.190 albertel 4891: &logthis("<font color='red'>CRITICAL: "
1.161 foxr 4892: ."Disconnect from $clientip ($clientname)</font>");
4893:
4894:
4895: # this exit is VERY important, otherwise the child will become
4896: # a producer of more and more children, forking yourself into
4897: # process death.
4898: exit;
1.106 foxr 4899:
1.78 foxr 4900: }
1.261 foxr 4901: #
4902: # Determine if a user is an author for the indicated domain.
4903: #
4904: # Parameters:
4905: # domain - domain to check in .
4906: # user - Name of user to check.
4907: #
4908: # Return:
4909: # 1 - User is an author for domain.
4910: # 0 - User is not an author for domain.
4911: sub is_author {
4912: my ($domain, $user) = @_;
4913:
4914: &Debug("is_author: $user @ $domain");
4915:
4916: my $hashref = &tie_user_hash($domain, $user, "roles",
4917: &GDBM_READER());
4918:
4919: # Author role should show up as a key /domain/_au
1.78 foxr 4920:
1.261 foxr 4921: my $key = "/$domain/_au";
4922: my $value = $hashref->{$key};
1.78 foxr 4923:
1.261 foxr 4924: if(defined($value)) {
4925: &Debug("$user @ $domain is an author");
4926: }
4927:
4928: return defined($value);
4929: }
1.78 foxr 4930: #
4931: # Checks to see if the input roleput request was to set
4932: # an author role. If so, invokes the lchtmldir script to set
4933: # up a correct public_html
4934: # Parameters:
4935: # request - The request sent to the rolesput subchunk.
4936: # We're looking for /domain/_au
4937: # domain - The domain in which the user is having roles doctored.
4938: # user - Name of the user for which the role is being put.
4939: # authtype - The authentication type associated with the user.
4940: #
1.230 foxr 4941: sub manage_permissions
1.78 foxr 4942: {
1.192 foxr 4943:
1.261 foxr 4944:
1.192 foxr 4945: my ($request, $domain, $user, $authtype) = @_;
1.78 foxr 4946:
1.261 foxr 4947: &Debug("manage_permissions: $request $domain $user $authtype");
4948:
1.78 foxr 4949: # See if the request is of the form /$domain/_au
4950: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
4951: my $execdir = $perlvar{'lonDaemons'};
4952: my $userhome= "/home/$user" ;
1.134 albertel 4953: &logthis("system $execdir/lchtmldir $userhome $user $authtype");
1.261 foxr 4954: &Debug("Setting homedir permissions for $userhome");
1.78 foxr 4955: system("$execdir/lchtmldir $userhome $user $authtype");
4956: }
4957: }
1.222 foxr 4958:
4959:
4960: #
4961: # Return the full path of a user password file, whether it exists or not.
4962: # Parameters:
4963: # domain - Domain in which the password file lives.
4964: # user - name of the user.
4965: # Returns:
4966: # Full passwd path:
4967: #
4968: sub password_path {
4969: my ($domain, $user) = @_;
1.264 albertel 4970: return &propath($domain, $user).'/passwd';
1.222 foxr 4971: }
4972:
4973: # Password Filename
4974: # Returns the path to a passwd file given domain and user... only if
4975: # it exists.
4976: # Parameters:
4977: # domain - Domain in which to search.
4978: # user - username.
4979: # Returns:
4980: # - If the password file exists returns its path.
4981: # - If the password file does not exist, returns undefined.
4982: #
4983: sub password_filename {
4984: my ($domain, $user) = @_;
4985:
4986: Debug ("PasswordFilename called: dom = $domain user = $user");
4987:
4988: my $path = &password_path($domain, $user);
4989: Debug("PasswordFilename got path: $path");
4990: if(-e $path) {
4991: return $path;
4992: } else {
4993: return undef;
4994: }
4995: }
4996:
4997: #
4998: # Rewrite the contents of the user's passwd file.
4999: # Parameters:
5000: # domain - domain of the user.
5001: # name - User's name.
5002: # contents - New contents of the file.
5003: # Returns:
5004: # 0 - Failed.
5005: # 1 - Success.
5006: #
5007: sub rewrite_password_file {
5008: my ($domain, $user, $contents) = @_;
5009:
5010: my $file = &password_filename($domain, $user);
5011: if (defined $file) {
5012: my $pf = IO::File->new(">$file");
5013: if($pf) {
5014: print $pf "$contents\n";
5015: return 1;
5016: } else {
5017: return 0;
5018: }
5019: } else {
5020: return 0;
5021: }
5022:
5023: }
5024:
1.78 foxr 5025: #
1.222 foxr 5026: # get_auth_type - Determines the authorization type of a user in a domain.
1.78 foxr 5027:
5028: # Returns the authorization type or nouser if there is no such user.
5029: #
1.222 foxr 5030: sub get_auth_type
1.78 foxr 5031: {
1.192 foxr 5032:
5033: my ($domain, $user) = @_;
1.78 foxr 5034:
1.222 foxr 5035: Debug("get_auth_type( $domain, $user ) \n");
1.78 foxr 5036: my $proname = &propath($domain, $user);
5037: my $passwdfile = "$proname/passwd";
5038: if( -e $passwdfile ) {
5039: my $pf = IO::File->new($passwdfile);
5040: my $realpassword = <$pf>;
5041: chomp($realpassword);
1.79 foxr 5042: Debug("Password info = $realpassword\n");
1.78 foxr 5043: my ($authtype, $contentpwd) = split(/:/, $realpassword);
1.79 foxr 5044: Debug("Authtype = $authtype, content = $contentpwd\n");
1.259 raeburn 5045: return "$authtype:$contentpwd";
1.224 foxr 5046: } else {
1.79 foxr 5047: Debug("Returning nouser");
1.78 foxr 5048: return "nouser";
5049: }
1.1 albertel 5050: }
5051:
1.220 foxr 5052: #
5053: # Validate a user given their domain, name and password. This utility
5054: # function is used by both AuthenticateHandler and ChangePasswordHandler
5055: # to validate the login credentials of a user.
5056: # Parameters:
5057: # $domain - The domain being logged into (this is required due to
5058: # the capability for multihomed systems.
5059: # $user - The name of the user being validated.
5060: # $password - The user's propoposed password.
5061: #
5062: # Returns:
5063: # 1 - The domain,user,pasword triplet corresponds to a valid
5064: # user.
5065: # 0 - The domain,user,password triplet is not a valid user.
5066: #
5067: sub validate_user {
5068: my ($domain, $user, $password) = @_;
5069:
5070:
5071: # Why negative ~pi you may well ask? Well this function is about
5072: # authentication, and therefore very important to get right.
5073: # I've initialized the flag that determines whether or not I've
5074: # validated correctly to a value it's not supposed to get.
5075: # At the end of this function. I'll ensure that it's not still that
5076: # value so we don't just wind up returning some accidental value
5077: # as a result of executing an unforseen code path that
1.249 foxr 5078: # did not set $validated. At the end of valid execution paths,
5079: # validated shoule be 1 for success or 0 for failuer.
1.220 foxr 5080:
5081: my $validated = -3.14159;
5082:
5083: # How we authenticate is determined by the type of authentication
5084: # the user has been assigned. If the authentication type is
5085: # "nouser", the user does not exist so we will return 0.
5086:
1.222 foxr 5087: my $contents = &get_auth_type($domain, $user);
1.220 foxr 5088: my ($howpwd, $contentpwd) = split(/:/, $contents);
5089:
5090: my $null = pack("C",0); # Used by kerberos auth types.
5091:
5092: if ($howpwd ne 'nouser') {
5093:
5094: if($howpwd eq "internal") { # Encrypted is in local password file.
5095: $validated = (crypt($password, $contentpwd) eq $contentpwd);
5096: }
5097: elsif ($howpwd eq "unix") { # User is a normal unix user.
5098: $contentpwd = (getpwnam($user))[1];
5099: if($contentpwd) {
5100: if($contentpwd eq 'x') { # Shadow password file...
5101: my $pwauth_path = "/usr/local/sbin/pwauth";
5102: open PWAUTH, "|$pwauth_path" or
5103: die "Cannot invoke authentication";
5104: print PWAUTH "$user\n$password\n";
5105: close PWAUTH;
5106: $validated = ! $?;
5107:
5108: } else { # Passwords in /etc/passwd.
5109: $validated = (crypt($password,
5110: $contentpwd) eq $contentpwd);
5111: }
5112: } else {
5113: $validated = 0;
5114: }
5115: }
5116: elsif ($howpwd eq "krb4") { # user is in kerberos 4 auth. domain.
5117: if(! ($password =~ /$null/) ) {
5118: my $k4error = &Authen::Krb4::get_pw_in_tkt($user,
5119: "",
5120: $contentpwd,,
5121: 'krbtgt',
5122: $contentpwd,
5123: 1,
5124: $password);
5125: if(!$k4error) {
5126: $validated = 1;
1.224 foxr 5127: } else {
1.220 foxr 5128: $validated = 0;
5129: &logthis('krb4: '.$user.', '.$contentpwd.', '.
5130: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
5131: }
1.224 foxr 5132: } else {
1.220 foxr 5133: $validated = 0; # Password has a match with null.
5134: }
1.224 foxr 5135: } elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain.
1.220 foxr 5136: if(!($password =~ /$null/)) { # Null password not allowed.
5137: my $krbclient = &Authen::Krb5::parse_name($user.'@'
5138: .$contentpwd);
5139: my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd;
5140: my $krbserver = &Authen::Krb5::parse_name($krbservice);
5141: my $credentials= &Authen::Krb5::cc_default();
5142: $credentials->initialize($krbclient);
1.270 matthew 5143: my $krbreturn = &Authen::Krb5::get_in_tkt_with_password($krbclient,
1.220 foxr 5144: $krbserver,
5145: $password,
5146: $credentials);
5147: $validated = ($krbreturn == 1);
1.224 foxr 5148: } else {
1.220 foxr 5149: $validated = 0;
5150: }
1.224 foxr 5151: } elsif ($howpwd eq "localauth") {
1.220 foxr 5152: # Authenticate via installation specific authentcation method:
5153: $validated = &localauth::localauth($user,
5154: $password,
5155: $contentpwd);
1.224 foxr 5156: } else { # Unrecognized auth is also bad.
1.220 foxr 5157: $validated = 0;
5158: }
5159: } else {
5160: $validated = 0;
5161: }
5162: #
5163: # $validated has the correct stat of the authentication:
5164: #
5165:
5166: unless ($validated != -3.14159) {
1.249 foxr 5167: # I >really really< want to know if this happens.
5168: # since it indicates that user authentication is badly
5169: # broken in some code path.
5170: #
5171: die "ValidateUser - failed to set the value of validated $domain, $user $password";
1.220 foxr 5172: }
5173: return $validated;
5174: }
5175:
5176:
1.84 albertel 5177: sub addline {
5178: my ($fname,$hostid,$ip,$newline)=@_;
5179: my $contents;
5180: my $found=0;
5181: my $expr='^'.$hostid.':'.$ip.':';
5182: $expr =~ s/\./\\\./g;
1.134 albertel 5183: my $sh;
1.84 albertel 5184: if ($sh=IO::File->new("$fname.subscription")) {
5185: while (my $subline=<$sh>) {
5186: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
5187: }
5188: $sh->close();
5189: }
5190: $sh=IO::File->new(">$fname.subscription");
5191: if ($contents) { print $sh $contents; }
5192: if ($newline) { print $sh $newline; }
5193: $sh->close();
5194: return $found;
1.86 www 5195: }
5196:
1.234 foxr 5197: sub get_chat {
1.122 www 5198: my ($cdom,$cname,$udom,$uname)=@_;
1.87 www 5199: my %hash;
5200: my $proname=&propath($cdom,$cname);
5201: my @entries=();
1.88 albertel 5202: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
5203: &GDBM_READER(),0640)) {
5204: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
5205: untie %hash;
1.123 www 5206: }
1.124 www 5207: my @participants=();
1.134 albertel 5208: my $cutoff=time-60;
1.123 www 5209: if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db",
1.124 www 5210: &GDBM_WRCREAT(),0640)) {
5211: $hash{$uname.':'.$udom}=time;
1.123 www 5212: foreach (sort keys %hash) {
5213: if ($hash{$_}>$cutoff) {
1.124 www 5214: $participants[$#participants+1]='active_participant:'.$_;
1.123 www 5215: }
5216: }
5217: untie %hash;
1.86 www 5218: }
1.124 www 5219: return (@participants,@entries);
1.86 www 5220: }
5221:
1.234 foxr 5222: sub chat_add {
1.88 albertel 5223: my ($cdom,$cname,$newchat)=@_;
5224: my %hash;
5225: my $proname=&propath($cdom,$cname);
5226: my @entries=();
1.142 www 5227: my $time=time;
1.88 albertel 5228: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
5229: &GDBM_WRCREAT(),0640)) {
5230: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
5231: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
5232: my ($thentime,$idnum)=split(/\_/,$lastid);
5233: my $newid=$time.'_000000';
5234: if ($thentime==$time) {
5235: $idnum=~s/^0+//;
5236: $idnum++;
5237: $idnum=substr('000000'.$idnum,-6,6);
5238: $newid=$time.'_'.$idnum;
5239: }
5240: $hash{$newid}=$newchat;
5241: my $expired=$time-3600;
5242: foreach (keys %hash) {
5243: my ($thistime)=($_=~/(\d+)\_/);
5244: if ($thistime<$expired) {
1.89 www 5245: delete $hash{$_};
1.88 albertel 5246: }
5247: }
5248: untie %hash;
1.142 www 5249: }
5250: {
5251: my $hfh;
5252: if ($hfh=IO::File->new(">>$proname/chatroom.log")) {
5253: print $hfh "$time:".&unescape($newchat)."\n";
5254: }
1.86 www 5255: }
1.84 albertel 5256: }
5257:
5258: sub unsub {
5259: my ($fname,$clientip)=@_;
5260: my $result;
1.188 foxr 5261: my $unsubs = 0; # Number of successful unsubscribes:
5262:
5263:
5264: # An old way subscriptions were handled was to have a
5265: # subscription marker file:
5266:
5267: Debug("Attempting unlink of $fname.$clientname");
1.161 foxr 5268: if (unlink("$fname.$clientname")) {
1.188 foxr 5269: $unsubs++; # Successful unsub via marker file.
5270: }
5271:
5272: # The more modern way to do it is to have a subscription list
5273: # file:
5274:
1.84 albertel 5275: if (-e "$fname.subscription") {
1.161 foxr 5276: my $found=&addline($fname,$clientname,$clientip,'');
1.188 foxr 5277: if ($found) {
5278: $unsubs++;
5279: }
5280: }
5281:
5282: # If either or both of these mechanisms succeeded in unsubscribing a
5283: # resource we can return ok:
5284:
5285: if($unsubs) {
5286: $result = "ok\n";
1.84 albertel 5287: } else {
1.188 foxr 5288: $result = "not_subscribed\n";
1.84 albertel 5289: }
1.188 foxr 5290:
1.84 albertel 5291: return $result;
5292: }
5293:
1.101 www 5294: sub currentversion {
5295: my $fname=shift;
5296: my $version=-1;
5297: my $ulsdir='';
5298: if ($fname=~/^(.+)\/[^\/]+$/) {
5299: $ulsdir=$1;
5300: }
1.114 albertel 5301: my ($fnamere1,$fnamere2);
5302: # remove version if already specified
1.101 www 5303: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
1.114 albertel 5304: # get the bits that go before and after the version number
5305: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
5306: $fnamere1=$1;
5307: $fnamere2='.'.$2;
5308: }
1.101 www 5309: if (-e $fname) { $version=1; }
5310: if (-e $ulsdir) {
1.134 albertel 5311: if(-d $ulsdir) {
5312: if (opendir(LSDIR,$ulsdir)) {
5313: my $ulsfn;
5314: while ($ulsfn=readdir(LSDIR)) {
1.101 www 5315: # see if this is a regular file (ignore links produced earlier)
1.134 albertel 5316: my $thisfile=$ulsdir.'/'.$ulsfn;
5317: unless (-l $thisfile) {
1.160 www 5318: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
1.134 albertel 5319: if ($1>$version) { $version=$1; }
5320: }
5321: }
5322: }
5323: closedir(LSDIR);
5324: $version++;
5325: }
5326: }
5327: }
5328: return $version;
1.101 www 5329: }
5330:
5331: sub thisversion {
5332: my $fname=shift;
5333: my $version=-1;
5334: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
5335: $version=$1;
5336: }
5337: return $version;
5338: }
5339:
1.84 albertel 5340: sub subscribe {
5341: my ($userinput,$clientip)=@_;
5342: my $result;
5343: my ($cmd,$fname)=split(/:/,$userinput);
5344: my $ownership=&ishome($fname);
5345: if ($ownership eq 'owner') {
1.101 www 5346: # explitly asking for the current version?
5347: unless (-e $fname) {
5348: my $currentversion=¤tversion($fname);
5349: if (&thisversion($fname)==$currentversion) {
5350: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
5351: my $root=$1;
5352: my $extension=$2;
5353: symlink($root.'.'.$extension,
5354: $root.'.'.$currentversion.'.'.$extension);
1.102 www 5355: unless ($extension=~/\.meta$/) {
5356: symlink($root.'.'.$extension.'.meta',
5357: $root.'.'.$currentversion.'.'.$extension.'.meta');
5358: }
1.101 www 5359: }
5360: }
5361: }
1.84 albertel 5362: if (-e $fname) {
5363: if (-d $fname) {
5364: $result="directory\n";
5365: } else {
1.161 foxr 5366: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
1.134 albertel 5367: my $now=time;
1.161 foxr 5368: my $found=&addline($fname,$clientname,$clientip,
5369: "$clientname:$clientip:$now\n");
1.84 albertel 5370: if ($found) { $result="$fname\n"; }
5371: # if they were subscribed to only meta data, delete that
5372: # subscription, when you subscribe to a file you also get
5373: # the metadata
5374: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
5375: $fname=~s/\/home\/httpd\/html\/res/raw/;
5376: $fname="http://$thisserver/".$fname;
5377: $result="$fname\n";
5378: }
5379: } else {
5380: $result="not_found\n";
5381: }
5382: } else {
5383: $result="rejected\n";
5384: }
5385: return $result;
5386: }
1.91 albertel 5387:
5388: sub make_passwd_file {
1.98 foxr 5389: my ($uname, $umode,$npass,$passfilename)=@_;
1.91 albertel 5390: my $result="ok\n";
5391: if ($umode eq 'krb4' or $umode eq 'krb5') {
5392: {
5393: my $pf = IO::File->new(">$passfilename");
1.261 foxr 5394: if ($pf) {
5395: print $pf "$umode:$npass\n";
5396: } else {
5397: $result = "pass_file_failed_error";
5398: }
1.91 albertel 5399: }
5400: } elsif ($umode eq 'internal') {
5401: my $salt=time;
5402: $salt=substr($salt,6,2);
5403: my $ncpass=crypt($npass,$salt);
5404: {
5405: &Debug("Creating internal auth");
5406: my $pf = IO::File->new(">$passfilename");
1.261 foxr 5407: if($pf) {
5408: print $pf "internal:$ncpass\n";
5409: } else {
5410: $result = "pass_file_failed_error";
5411: }
1.91 albertel 5412: }
5413: } elsif ($umode eq 'localauth') {
5414: {
5415: my $pf = IO::File->new(">$passfilename");
1.261 foxr 5416: if($pf) {
5417: print $pf "localauth:$npass\n";
5418: } else {
5419: $result = "pass_file_failed_error";
5420: }
1.91 albertel 5421: }
5422: } elsif ($umode eq 'unix') {
5423: {
1.186 foxr 5424: #
5425: # Don't allow the creation of privileged accounts!!! that would
5426: # be real bad!!!
5427: #
5428: my $uid = getpwnam($uname);
5429: if((defined $uid) && ($uid == 0)) {
5430: &logthis(">>>Attempted to create privilged account blocked");
5431: return "no_priv_account_error\n";
5432: }
5433:
1.223 foxr 5434: my $execpath ="$perlvar{'lonDaemons'}/"."lcuseradd";
1.224 foxr 5435:
5436: my $lc_error_file = $execdir."/tmp/lcuseradd".$$.".status";
1.91 albertel 5437: {
5438: &Debug("Executing external: ".$execpath);
1.98 foxr 5439: &Debug("user = ".$uname.", Password =". $npass);
1.132 matthew 5440: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
1.91 albertel 5441: print $se "$uname\n";
5442: print $se "$npass\n";
5443: print $se "$npass\n";
1.223 foxr 5444: print $se "$lc_error_file\n"; # Status -> unique file.
1.97 foxr 5445: }
1.223 foxr 5446: my $error = IO::File->new("< $lc_error_file");
5447: my $useraddok = <$error>;
5448: $error->close;
5449: unlink($lc_error_file);
5450:
5451: chomp $useraddok;
5452:
1.97 foxr 5453: if($useraddok > 0) {
1.223 foxr 5454: my $error_text = &lcuseraddstrerror($useraddok);
5455: &logthis("Failed lcuseradd: $error_text");
5456: $result = "lcuseradd_failed:$error_text\n";
1.224 foxr 5457: } else {
1.223 foxr 5458: my $pf = IO::File->new(">$passfilename");
1.261 foxr 5459: if($pf) {
5460: print $pf "unix:\n";
5461: } else {
5462: $result = "pass_file_failed_error";
5463: }
1.91 albertel 5464: }
5465: }
5466: } elsif ($umode eq 'none') {
5467: {
1.223 foxr 5468: my $pf = IO::File->new("> $passfilename");
1.261 foxr 5469: if($pf) {
5470: print $pf "none:\n";
5471: } else {
5472: $result = "pass_file_failed_error";
5473: }
1.91 albertel 5474: }
5475: } else {
5476: $result="auth_mode_error\n";
5477: }
5478: return $result;
1.121 albertel 5479: }
5480:
1.265 albertel 5481: sub convert_photo {
5482: my ($start,$dest)=@_;
5483: system("convert $start $dest");
5484: }
5485:
1.121 albertel 5486: sub sethost {
5487: my ($remotereq) = @_;
5488: my (undef,$hostid)=split(/:/,$remotereq);
5489: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
5490: if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
1.200 matthew 5491: $currenthostid =$hostid;
1.121 albertel 5492: $currentdomainid=$hostdom{$hostid};
5493: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
5494: } else {
5495: &logthis("Requested host id $hostid not an alias of ".
5496: $perlvar{'lonHostID'}." refusing connection");
5497: return 'unable_to_set';
5498: }
5499: return 'ok';
5500: }
5501:
5502: sub version {
5503: my ($userinput)=@_;
5504: $remoteVERSION=(split(/:/,$userinput))[1];
5505: return "version:$VERSION";
1.127 albertel 5506: }
1.178 foxr 5507:
1.128 albertel 5508: #There is a copy of this in lonnet.pm
1.127 albertel 5509: sub userload {
5510: my $numusers=0;
5511: {
5512: opendir(LONIDS,$perlvar{'lonIDsDir'});
5513: my $filename;
5514: my $curtime=time;
5515: while ($filename=readdir(LONIDS)) {
5516: if ($filename eq '.' || $filename eq '..') {next;}
1.138 albertel 5517: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
1.159 albertel 5518: if ($curtime-$mtime < 1800) { $numusers++; }
1.127 albertel 5519: }
5520: closedir(LONIDS);
5521: }
5522: my $userloadpercent=0;
5523: my $maxuserload=$perlvar{'lonUserLoadLim'};
5524: if ($maxuserload) {
1.129 albertel 5525: $userloadpercent=100*$numusers/$maxuserload;
1.127 albertel 5526: }
1.130 albertel 5527: $userloadpercent=sprintf("%.2f",$userloadpercent);
1.127 albertel 5528: return $userloadpercent;
1.91 albertel 5529: }
5530:
1.205 raeburn 5531: # Routines for serializing arrays and hashes (copies from lonnet)
5532:
5533: sub array2str {
5534: my (@array) = @_;
5535: my $result=&arrayref2str(\@array);
5536: $result=~s/^__ARRAY_REF__//;
5537: $result=~s/__END_ARRAY_REF__$//;
5538: return $result;
5539: }
5540:
5541: sub arrayref2str {
5542: my ($arrayref) = @_;
5543: my $result='__ARRAY_REF__';
5544: foreach my $elem (@$arrayref) {
5545: if(ref($elem) eq 'ARRAY') {
5546: $result.=&arrayref2str($elem).'&';
5547: } elsif(ref($elem) eq 'HASH') {
5548: $result.=&hashref2str($elem).'&';
5549: } elsif(ref($elem)) {
5550: #print("Got a ref of ".(ref($elem))." skipping.");
5551: } else {
5552: $result.=&escape($elem).'&';
5553: }
5554: }
5555: $result=~s/\&$//;
5556: $result .= '__END_ARRAY_REF__';
5557: return $result;
5558: }
5559:
5560: sub hash2str {
5561: my (%hash) = @_;
5562: my $result=&hashref2str(\%hash);
5563: $result=~s/^__HASH_REF__//;
5564: $result=~s/__END_HASH_REF__$//;
5565: return $result;
5566: }
5567:
5568: sub hashref2str {
5569: my ($hashref)=@_;
5570: my $result='__HASH_REF__';
5571: foreach (sort(keys(%$hashref))) {
5572: if (ref($_) eq 'ARRAY') {
5573: $result.=&arrayref2str($_).'=';
5574: } elsif (ref($_) eq 'HASH') {
5575: $result.=&hashref2str($_).'=';
5576: } elsif (ref($_)) {
5577: $result.='=';
5578: #print("Got a ref of ".(ref($_))." skipping.");
5579: } else {
5580: if ($_) {$result.=&escape($_).'=';} else { last; }
5581: }
5582:
5583: if(ref($hashref->{$_}) eq 'ARRAY') {
5584: $result.=&arrayref2str($hashref->{$_}).'&';
5585: } elsif(ref($hashref->{$_}) eq 'HASH') {
5586: $result.=&hashref2str($hashref->{$_}).'&';
5587: } elsif(ref($hashref->{$_})) {
5588: $result.='&';
5589: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
5590: } else {
5591: $result.=&escape($hashref->{$_}).'&';
5592: }
5593: }
5594: $result=~s/\&$//;
5595: $result .= '__END_HASH_REF__';
5596: return $result;
5597: }
1.200 matthew 5598:
1.61 harris41 5599: # ----------------------------------- POD (plain old documentation, CPAN style)
5600:
5601: =head1 NAME
5602:
5603: lond - "LON Daemon" Server (port "LOND" 5663)
5604:
5605: =head1 SYNOPSIS
5606:
1.74 harris41 5607: Usage: B<lond>
5608:
5609: Should only be run as user=www. This is a command-line script which
5610: is invoked by B<loncron>. There is no expectation that a typical user
5611: will manually start B<lond> from the command-line. (In other words,
5612: DO NOT START B<lond> YOURSELF.)
1.61 harris41 5613:
5614: =head1 DESCRIPTION
5615:
1.74 harris41 5616: There are two characteristics associated with the running of B<lond>,
5617: PROCESS MANAGEMENT (starting, stopping, handling child processes)
5618: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
5619: subscriptions, etc). These are described in two large
5620: sections below.
5621:
5622: B<PROCESS MANAGEMENT>
5623:
1.61 harris41 5624: Preforker - server who forks first. Runs as a daemon. HUPs.
5625: Uses IDEA encryption
5626:
1.74 harris41 5627: B<lond> forks off children processes that correspond to the other servers
5628: in the network. Management of these processes can be done at the
5629: parent process level or the child process level.
5630:
5631: B<logs/lond.log> is the location of log messages.
5632:
5633: The process management is now explained in terms of linux shell commands,
5634: subroutines internal to this code, and signal assignments:
5635:
5636: =over 4
5637:
5638: =item *
5639:
5640: PID is stored in B<logs/lond.pid>
5641:
5642: This is the process id number of the parent B<lond> process.
5643:
5644: =item *
5645:
5646: SIGTERM and SIGINT
5647:
5648: Parent signal assignment:
5649: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
5650:
5651: Child signal assignment:
5652: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
5653: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
5654: to restart a new child.)
5655:
5656: Command-line invocations:
5657: B<kill> B<-s> SIGTERM I<PID>
5658: B<kill> B<-s> SIGINT I<PID>
5659:
5660: Subroutine B<HUNTSMAN>:
5661: This is only invoked for the B<lond> parent I<PID>.
5662: This kills all the children, and then the parent.
5663: The B<lonc.pid> file is cleared.
5664:
5665: =item *
5666:
5667: SIGHUP
5668:
5669: Current bug:
5670: This signal can only be processed the first time
5671: on the parent process. Subsequent SIGHUP signals
5672: have no effect.
5673:
5674: Parent signal assignment:
5675: $SIG{HUP} = \&HUPSMAN;
5676:
5677: Child signal assignment:
5678: none (nothing happens)
5679:
5680: Command-line invocations:
5681: B<kill> B<-s> SIGHUP I<PID>
5682:
5683: Subroutine B<HUPSMAN>:
5684: This is only invoked for the B<lond> parent I<PID>,
5685: This kills all the children, and then the parent.
5686: The B<lond.pid> file is cleared.
5687:
5688: =item *
5689:
5690: SIGUSR1
5691:
5692: Parent signal assignment:
5693: $SIG{USR1} = \&USRMAN;
5694:
5695: Child signal assignment:
5696: $SIG{USR1}= \&logstatus;
5697:
5698: Command-line invocations:
5699: B<kill> B<-s> SIGUSR1 I<PID>
5700:
5701: Subroutine B<USRMAN>:
5702: When invoked for the B<lond> parent I<PID>,
5703: SIGUSR1 is sent to all the children, and the status of
5704: each connection is logged.
1.144 foxr 5705:
5706: =item *
5707:
5708: SIGUSR2
5709:
5710: Parent Signal assignment:
5711: $SIG{USR2} = \&UpdateHosts
5712:
5713: Child signal assignment:
5714: NONE
5715:
1.74 harris41 5716:
5717: =item *
5718:
5719: SIGCHLD
5720:
5721: Parent signal assignment:
5722: $SIG{CHLD} = \&REAPER;
5723:
5724: Child signal assignment:
5725: none
5726:
5727: Command-line invocations:
5728: B<kill> B<-s> SIGCHLD I<PID>
5729:
5730: Subroutine B<REAPER>:
5731: This is only invoked for the B<lond> parent I<PID>.
5732: Information pertaining to the child is removed.
5733: The socket port is cleaned up.
5734:
5735: =back
5736:
5737: B<SERVER-SIDE ACTIVITIES>
5738:
5739: Server-side information can be accepted in an encrypted or non-encrypted
5740: method.
5741:
5742: =over 4
5743:
5744: =item ping
5745:
5746: Query a client in the hosts.tab table; "Are you there?"
5747:
5748: =item pong
5749:
5750: Respond to a ping query.
5751:
5752: =item ekey
5753:
5754: Read in encrypted key, make cipher. Respond with a buildkey.
5755:
5756: =item load
5757:
5758: Respond with CPU load based on a computation upon /proc/loadavg.
5759:
5760: =item currentauth
5761:
5762: Reply with current authentication information (only over an
5763: encrypted channel).
5764:
5765: =item auth
5766:
5767: Only over an encrypted channel, reply as to whether a user's
5768: authentication information can be validated.
5769:
5770: =item passwd
5771:
5772: Allow for a password to be set.
5773:
5774: =item makeuser
5775:
5776: Make a user.
5777:
5778: =item passwd
5779:
5780: Allow for authentication mechanism and password to be changed.
5781:
5782: =item home
1.61 harris41 5783:
1.74 harris41 5784: Respond to a question "are you the home for a given user?"
5785:
5786: =item update
5787:
5788: Update contents of a subscribed resource.
5789:
5790: =item unsubscribe
5791:
5792: The server is unsubscribing from a resource.
5793:
5794: =item subscribe
5795:
5796: The server is subscribing to a resource.
5797:
5798: =item log
5799:
5800: Place in B<logs/lond.log>
5801:
5802: =item put
5803:
5804: stores hash in namespace
5805:
1.230 foxr 5806: =item rolesputy
1.74 harris41 5807:
5808: put a role into a user's environment
5809:
5810: =item get
5811:
5812: returns hash with keys from array
5813: reference filled in from namespace
5814:
5815: =item eget
5816:
5817: returns hash with keys from array
5818: reference filled in from namesp (encrypts the return communication)
5819:
5820: =item rolesget
5821:
5822: get a role from a user's environment
5823:
5824: =item del
5825:
5826: deletes keys out of array from namespace
5827:
5828: =item keys
5829:
5830: returns namespace keys
5831:
5832: =item dump
5833:
5834: dumps the complete (or key matching regexp) namespace into a hash
5835:
5836: =item store
5837:
5838: stores hash permanently
5839: for this url; hashref needs to be given and should be a \%hashname; the
5840: remaining args aren't required and if they aren't passed or are '' they will
5841: be derived from the ENV
5842:
5843: =item restore
5844:
5845: returns a hash for a given url
5846:
5847: =item querysend
5848:
5849: Tells client about the lonsql process that has been launched in response
5850: to a sent query.
5851:
5852: =item queryreply
5853:
5854: Accept information from lonsql and make appropriate storage in temporary
5855: file space.
5856:
5857: =item idput
5858:
5859: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
5860: for each student, defined perhaps by the institutional Registrar.)
5861:
5862: =item idget
5863:
5864: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
5865: for each student, defined perhaps by the institutional Registrar.)
5866:
5867: =item tmpput
5868:
5869: Accept and store information in temporary space.
5870:
5871: =item tmpget
5872:
5873: Send along temporarily stored information.
5874:
5875: =item ls
5876:
5877: List part of a user's directory.
5878:
1.135 foxr 5879: =item pushtable
5880:
5881: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
5882: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
5883: must be restored manually in case of a problem with the new table file.
5884: pushtable requires that the request be encrypted and validated via
5885: ValidateManager. The form of the command is:
5886: enc:pushtable tablename <tablecontents> \n
5887: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
5888: cleartext newline.
5889:
1.74 harris41 5890: =item Hanging up (exit or init)
5891:
5892: What to do when a client tells the server that they (the client)
5893: are leaving the network.
5894:
5895: =item unknown command
5896:
5897: If B<lond> is sent an unknown command (not in the list above),
5898: it replys to the client "unknown_cmd".
1.135 foxr 5899:
1.74 harris41 5900:
5901: =item UNKNOWN CLIENT
5902:
5903: If the anti-spoofing algorithm cannot verify the client,
5904: the client is rejected (with a "refused" message sent
5905: to the client, and the connection is closed.
5906:
5907: =back
1.61 harris41 5908:
5909: =head1 PREREQUISITES
5910:
5911: IO::Socket
5912: IO::File
5913: Apache::File
5914: Symbol
5915: POSIX
5916: Crypt::IDEA
5917: LWP::UserAgent()
5918: GDBM_File
5919: Authen::Krb4
1.91 albertel 5920: Authen::Krb5
1.61 harris41 5921:
5922: =head1 COREQUISITES
5923:
5924: =head1 OSNAMES
5925:
5926: linux
5927:
5928: =head1 SCRIPT CATEGORIES
5929:
5930: Server/Process
5931:
5932: =cut
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