1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.489.2.5 2013/05/11 22:42:22 raeburn Exp $
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
13: # the Free Software Foundation; either version 2 of the License, or
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:
19: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20: # GNU General Public License for more details.
21: #
22: # You should have received a copy of the GNU General Public License
23: # along with LON-CAPA; if not, write to the Free Software
24: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25: #
26: # /home/httpd/html/adm/gpl.txt
27: #
28:
29:
30: # http://www.lon-capa.org/
31: #
32:
33: use strict;
34: use lib '/home/httpd/lib/perl/';
35: use LONCAPA;
36: use LONCAPA::Configuration;
37: use LONCAPA::Lond;
38:
39: use IO::Socket;
40: use IO::File;
41: #use Apache::File;
42: use POSIX;
43: use Crypt::IDEA;
44: use LWP::UserAgent();
45: use Digest::MD5 qw(md5_hex);
46: use GDBM_File;
47: use Authen::Krb5;
48: use localauth;
49: use localenroll;
50: use localstudentphoto;
51: use File::Copy;
52: use File::Find;
53: use LONCAPA::lonlocal;
54: use LONCAPA::lonssl;
55: use Fcntl qw(:flock);
56: use Apache::lonnet;
57: use Mail::Send;
58:
59: my $DEBUG = 0; # Non zero to enable debug log entries.
60:
61: my $status='';
62: my $lastlog='';
63:
64: my $VERSION='$Revision: 1.489.2.5 $'; #' stupid emacs
65: my $remoteVERSION;
66: my $currenthostid="default";
67: my $currentdomainid;
68:
69: my $client;
70: my $clientip; # IP address of client.
71: my $clientname; # LonCAPA name of client.
72: my $clientversion; # LonCAPA version running on client.
73: my $clienthomedom; # LonCAPA domain of homeID for client.
74: # primary library server.
75:
76: my $server;
77:
78: my $keymode;
79:
80: my $cipher; # Cipher key negotiated with client
81: my $tmpsnum = 0; # Id of tmpputs.
82:
83: #
84: # Connection type is:
85: # client - All client actions are allowed
86: # manager - only management functions allowed.
87: # both - Both management and client actions are allowed
88: #
89:
90: my $ConnectionType;
91:
92: my %managers; # Ip -> manager names
93:
94: my %perlvar; # Will have the apache conf defined perl vars.
95:
96: my $dist;
97:
98: #
99: # The hash below is used for command dispatching, and is therefore keyed on the request keyword.
100: # Each element of the hash contains a reference to an array that contains:
101: # A reference to a sub that executes the request corresponding to the keyword.
102: # A flag that is true if the request must be encoded to be acceptable.
103: # A mask with bits as follows:
104: # CLIENT_OK - Set when the function is allowed by ordinary clients
105: # MANAGER_OK - Set when the function is allowed to manager clients.
106: #
107: my $CLIENT_OK = 1;
108: my $MANAGER_OK = 2;
109: my %Dispatcher;
110:
111:
112: #
113: # The array below are password error strings."
114: #
115: my $lastpwderror = 13; # Largest error number from lcpasswd.
116: my @passwderrors = ("ok",
117: "pwchange_failure - lcpasswd must be run as user 'www'",
118: "pwchange_failure - lcpasswd got incorrect number of arguments",
119: "pwchange_failure - lcpasswd did not get the right nubmer of input text lines",
120: "pwchange_failure - lcpasswd too many simultaneous pwd changes in progress",
121: "pwchange_failure - lcpasswd User does not exist.",
122: "pwchange_failure - lcpasswd Incorrect current passwd",
123: "pwchange_failure - lcpasswd Unable to su to root.",
124: "pwchange_failure - lcpasswd Cannot set new passwd.",
125: "pwchange_failure - lcpasswd Username has invalid characters",
126: "pwchange_failure - lcpasswd Invalid characters in password",
127: "pwchange_failure - lcpasswd User already exists",
128: "pwchange_failure - lcpasswd Something went wrong with user addition.",
129: "pwchange_failure - lcpasswd Password mismatch",
130: "pwchange_failure - lcpasswd Error filename is invalid");
131:
132:
133: # The array below are lcuseradd error strings.:
134:
135: my $lastadderror = 13;
136: my @adderrors = ("ok",
137: "User ID mismatch, lcuseradd must run as user www",
138: "lcuseradd Incorrect number of command line parameters must be 3",
139: "lcuseradd Incorrect number of stdinput lines, must be 3",
140: "lcuseradd Too many other simultaneous pwd changes in progress",
141: "lcuseradd User does not exist",
142: "lcuseradd Unable to make www member of users's group",
143: "lcuseradd Unable to su to root",
144: "lcuseradd Unable to set password",
145: "lcuseradd Username has invalid characters",
146: "lcuseradd Password has an invalid character",
147: "lcuseradd User already exists",
148: "lcuseradd Could not add user.",
149: "lcuseradd Password mismatch");
150:
151:
152: # This array are the errors from lcinstallfile:
153:
154: my @installerrors = ("ok",
155: "Initial user id of client not that of www",
156: "Usage error, not enough command line arguments",
157: "Source filename does not exist",
158: "Destination filename does not exist",
159: "Some file operation failed",
160: "Invalid table filename."
161: );
162:
163: #
164: # Statistics that are maintained and dislayed in the status line.
165: #
166: my $Transactions = 0; # Number of attempted transactions.
167: my $Failures = 0; # Number of transcations failed.
168:
169: # ResetStatistics:
170: # Resets the statistics counters:
171: #
172: sub ResetStatistics {
173: $Transactions = 0;
174: $Failures = 0;
175: }
176:
177: #------------------------------------------------------------------------
178: #
179: # LocalConnection
180: # Completes the formation of a locally authenticated connection.
181: # This function will ensure that the 'remote' client is really the
182: # local host. If not, the connection is closed, and the function fails.
183: # If so, initcmd is parsed for the name of a file containing the
184: # IDEA session key. The fie is opened, read, deleted and the session
185: # key returned to the caller.
186: #
187: # Parameters:
188: # $Socket - Socket open on client.
189: # $initcmd - The full text of the init command.
190: #
191: # Returns:
192: # IDEA session key on success.
193: # undef on failure.
194: #
195: sub LocalConnection {
196: my ($Socket, $initcmd) = @_;
197: Debug("Attempting local connection: $initcmd client: $clientip");
198: if($clientip ne "127.0.0.1") {
199: &logthis('<font color="red"> LocalConnection rejecting non local: '
200: ."$clientip ne 127.0.0.1 </font>");
201: close $Socket;
202: return undef;
203: } else {
204: chomp($initcmd); # Get rid of \n in filename.
205: my ($init, $type, $name) = split(/:/, $initcmd);
206: Debug(" Init command: $init $type $name ");
207:
208: # Require that $init = init, and $type = local: Otherwise
209: # the caller is insane:
210:
211: if(($init ne "init") && ($type ne "local")) {
212: &logthis('<font color = "red"> LocalConnection: caller is insane! '
213: ."init = $init, and type = $type </font>");
214: close($Socket);;
215: return undef;
216:
217: }
218: # Now get the key filename:
219:
220: my $IDEAKey = lonlocal::ReadKeyFile($name);
221: return $IDEAKey;
222: }
223: }
224: #------------------------------------------------------------------------------
225: #
226: # SSLConnection
227: # Completes the formation of an ssh authenticated connection. The
228: # socket is promoted to an ssl socket. If this promotion and the associated
229: # certificate exchange are successful, the IDEA key is generated and sent
230: # to the remote peer via the SSL tunnel. The IDEA key is also returned to
231: # the caller after the SSL tunnel is torn down.
232: #
233: # Parameters:
234: # Name Type Purpose
235: # $Socket IO::Socket::INET Plaintext socket.
236: #
237: # Returns:
238: # IDEA key on success.
239: # undef on failure.
240: #
241: sub SSLConnection {
242: my $Socket = shift;
243:
244: Debug("SSLConnection: ");
245: my $KeyFile = lonssl::KeyFile();
246: if(!$KeyFile) {
247: my $err = lonssl::LastError();
248: &logthis("<font color=\"red\"> CRITICAL"
249: ."Can't get key file $err </font>");
250: return undef;
251: }
252: my ($CACertificate,
253: $Certificate) = lonssl::CertificateFile();
254:
255:
256: # If any of the key, certificate or certificate authority
257: # certificate filenames are not defined, this can't work.
258:
259: if((!$Certificate) || (!$CACertificate)) {
260: my $err = lonssl::LastError();
261: &logthis("<font color=\"red\"> CRITICAL"
262: ."Can't get certificates: $err </font>");
263:
264: return undef;
265: }
266: Debug("Key: $KeyFile CA: $CACertificate Cert: $Certificate");
267:
268: # Indicate to our peer that we can procede with
269: # a transition to ssl authentication:
270:
271: print $Socket "ok:ssl\n";
272:
273: Debug("Approving promotion -> ssl");
274: # And do so:
275:
276: my $SSLSocket = lonssl::PromoteServerSocket($Socket,
277: $CACertificate,
278: $Certificate,
279: $KeyFile);
280: if(! ($SSLSocket) ) { # SSL socket promotion failed.
281: my $err = lonssl::LastError();
282: &logthis("<font color=\"red\"> CRITICAL "
283: ."SSL Socket promotion failed: $err </font>");
284: return undef;
285: }
286: Debug("SSL Promotion successful");
287:
288: #
289: # The only thing we'll use the socket for is to send the IDEA key
290: # to the peer:
291:
292: my $Key = lonlocal::CreateCipherKey();
293: print $SSLSocket "$Key\n";
294:
295: lonssl::Close($SSLSocket);
296:
297: Debug("Key exchange complete: $Key");
298:
299: return $Key;
300: }
301: #
302: # InsecureConnection:
303: # If insecure connections are allowd,
304: # exchange a challenge with the client to 'validate' the
305: # client (not really, but that's the protocol):
306: # We produce a challenge string that's sent to the client.
307: # The client must then echo the challenge verbatim to us.
308: #
309: # Parameter:
310: # Socket - Socket open on the client.
311: # Returns:
312: # 1 - success.
313: # 0 - failure (e.g.mismatch or insecure not allowed).
314: #
315: sub InsecureConnection {
316: my $Socket = shift;
317:
318: # Don't even start if insecure connections are not allowed.
319:
320: if(! $perlvar{londAllowInsecure}) { # Insecure connections not allowed.
321: return 0;
322: }
323:
324: # Fabricate a challenge string and send it..
325:
326: my $challenge = "$$".time; # pid + time.
327: print $Socket "$challenge\n";
328: &status("Waiting for challenge reply");
329:
330: my $answer = <$Socket>;
331: $answer =~s/\W//g;
332: if($challenge eq $answer) {
333: return 1;
334: } else {
335: logthis("<font color='blue'>WARNING client did not respond to challenge</font>");
336: &status("No challenge reqply");
337: return 0;
338: }
339:
340:
341: }
342: #
343: # Safely execute a command (as long as it's not a shel command and doesn
344: # not require/rely on shell escapes. The function operates by doing a
345: # a pipe based fork and capturing stdout and stderr from the pipe.
346: #
347: # Formal Parameters:
348: # $line - A line of text to be executed as a command.
349: # Returns:
350: # The output from that command. If the output is multiline the caller
351: # must know how to split up the output.
352: #
353: #
354: sub execute_command {
355: my ($line) = @_;
356: my @words = split(/\s/, $line); # Bust the command up into words.
357: my $output = "";
358:
359: my $pid = open(CHILD, "-|");
360:
361: if($pid) { # Parent process
362: Debug("In parent process for execute_command");
363: my @data = <CHILD>; # Read the child's outupt...
364: close CHILD;
365: foreach my $output_line (@data) {
366: Debug("Adding $output_line");
367: $output .= $output_line; # Presumably has a \n on it.
368: }
369:
370: } else { # Child process
371: close (STDERR);
372: open (STDERR, ">&STDOUT");# Combine stderr, and stdout...
373: exec(@words); # won't return.
374: }
375: return $output;
376: }
377:
378:
379: # GetCertificate: Given a transaction that requires a certificate,
380: # this function will extract the certificate from the transaction
381: # request. Note that at this point, the only concept of a certificate
382: # is the hostname to which we are connected.
383: #
384: # Parameter:
385: # request - The request sent by our client (this parameterization may
386: # need to change when we really use a certificate granting
387: # authority.
388: #
389: sub GetCertificate {
390: my $request = shift;
391:
392: return $clientip;
393: }
394:
395: #
396: # Return true if client is a manager.
397: #
398: sub isManager {
399: return (($ConnectionType eq "manager") || ($ConnectionType eq "both"));
400: }
401: #
402: # Return tru if client can do client functions
403: #
404: sub isClient {
405: return (($ConnectionType eq "client") || ($ConnectionType eq "both"));
406: }
407:
408:
409: #
410: # ReadManagerTable: Reads in the current manager table. For now this is
411: # done on each manager authentication because:
412: # - These authentications are not frequent
413: # - This allows dynamic changes to the manager table
414: # without the need to signal to the lond.
415: #
416: sub ReadManagerTable {
417:
418: &Debug("Reading manager table");
419: # Clean out the old table first..
420:
421: foreach my $key (keys %managers) {
422: delete $managers{$key};
423: }
424:
425: my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
426: if (!open (MANAGERS, $tablename)) {
427: my $hostname = &Apache::lonnet::hostname($perlvar{'lonHostID'});
428: if (&Apache::lonnet::is_LC_dns($hostname)) {
429: &logthis('<font color="red">No manager table. Nobody can manage!!</font>');
430: }
431: return;
432: }
433: while(my $host = <MANAGERS>) {
434: chomp($host);
435: if ($host =~ "^#") { # Comment line.
436: next;
437: }
438: if (!defined &Apache::lonnet::get_host_ip($host)) { # This is a non cluster member
439: # The entry is of the form:
440: # cluname:hostname
441: # cluname - A 'cluster hostname' is needed in order to negotiate
442: # the host key.
443: # hostname- The dns name of the host.
444: #
445: my($cluname, $dnsname) = split(/:/, $host);
446:
447: my $ip = gethostbyname($dnsname);
448: if(defined($ip)) { # bad names don't deserve entry.
449: my $hostip = inet_ntoa($ip);
450: $managers{$hostip} = $cluname;
451: logthis('<font color="green"> registering manager '.
452: "$dnsname as $cluname with $hostip </font>\n");
453: }
454: } else {
455: logthis('<font color="green"> existing host'." $host</font>\n");
456: $managers{&Apache::lonnet::get_host_ip($host)} = $host; # Use info from cluster tab if cluster memeber
457: }
458: }
459: }
460:
461: #
462: # ValidManager: Determines if a given certificate represents a valid manager.
463: # in this primitive implementation, the 'certificate' is
464: # just the connecting loncapa client name. This is checked
465: # against a valid client list in the configuration.
466: #
467: #
468: sub ValidManager {
469: my $certificate = shift;
470:
471: return isManager;
472: }
473: #
474: # CopyFile: Called as part of the process of installing a
475: # new configuration file. This function copies an existing
476: # file to a backup file.
477: # Parameters:
478: # oldfile - Name of the file to backup.
479: # newfile - Name of the backup file.
480: # Return:
481: # 0 - Failure (errno has failure reason).
482: # 1 - Success.
483: #
484: sub CopyFile {
485:
486: my ($oldfile, $newfile) = @_;
487:
488: if (! copy($oldfile,$newfile)) {
489: return 0;
490: }
491: chmod(0660, $newfile);
492: return 1;
493: }
494: #
495: # Host files are passed out with externally visible host IPs.
496: # If, for example, we are behind a fire-wall or NAT host, our
497: # internally visible IP may be different than the externally
498: # visible IP. Therefore, we always adjust the contents of the
499: # host file so that the entry for ME is the IP that we believe
500: # we have. At present, this is defined as the entry that
501: # DNS has for us. If by some chance we are not able to get a
502: # DNS translation for us, then we assume that the host.tab file
503: # is correct.
504: # BUGBUGBUG - in the future, we really should see if we can
505: # easily query the interface(s) instead.
506: # Parameter(s):
507: # contents - The contents of the host.tab to check.
508: # Returns:
509: # newcontents - The adjusted contents.
510: #
511: #
512: sub AdjustHostContents {
513: my $contents = shift;
514: my $adjusted;
515: my $me = $perlvar{'lonHostID'};
516:
517: foreach my $line (split(/\n/,$contents)) {
518: if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/) ||
519: ($line =~ /^\s*\^/))) {
520: chomp($line);
521: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
522: if ($id eq $me) {
523: my $ip = gethostbyname($name);
524: my $ipnew = inet_ntoa($ip);
525: $ip = $ipnew;
526: # Reconstruct the host line and append to adjusted:
527:
528: my $newline = "$id:$domain:$role:$name:$ip";
529: if($maxcon ne "") { # Not all hosts have loncnew tuning params
530: $newline .= ":$maxcon:$idleto:$mincon";
531: }
532: $adjusted .= $newline."\n";
533:
534: } else { # Not me, pass unmodified.
535: $adjusted .= $line."\n";
536: }
537: } else { # Blank or comment never re-written.
538: $adjusted .= $line."\n"; # Pass blanks and comments as is.
539: }
540: }
541: return $adjusted;
542: }
543: #
544: # InstallFile: Called to install an administrative file:
545: # - The file is created int a temp directory called <name>.tmp
546: # - lcinstall file is called to install the file.
547: # since the web app has no direct write access to the table directory
548: #
549: # Parameters:
550: # Name of the file
551: # File Contents.
552: # Return:
553: # nonzero - success.
554: # 0 - failure and $! has an errno.
555: # Assumptions:
556: # File installtion is a relatively infrequent
557: #
558: sub InstallFile {
559:
560: my ($Filename, $Contents) = @_;
561: # my $TempFile = $Filename.".tmp";
562: my $exedir = $perlvar{'lonDaemons'};
563: my $tmpdir = $exedir.'/tmp/';
564: my $TempFile = $tmpdir."TempTableFile.tmp";
565:
566: # Open the file for write:
567:
568: my $fh = IO::File->new("> $TempFile"); # Write to temp.
569: if(!(defined $fh)) {
570: &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
571: return 0;
572: }
573: # write the contents of the file:
574:
575: print $fh ($Contents);
576: $fh->close; # In case we ever have a filesystem w. locking
577:
578: chmod(0664, $TempFile); # Everyone can write it.
579:
580: # Use lcinstall file to put the file in the table directory...
581:
582: &Debug("Opening pipe to $exedir/lcinstallfile $TempFile $Filename");
583: my $pf = IO::File->new("| $exedir/lcinstallfile $TempFile $Filename > $exedir/logs/lcinstallfile.log");
584: close $pf;
585: my $err = $?;
586: &Debug("Status is $err");
587: if ($err != 0) {
588: my $msg = $err;
589: if ($err < @installerrors) {
590: $msg = $installerrors[$err];
591: }
592: &logthis("Install failed for table file $Filename : $msg");
593: return 0;
594: }
595:
596: # Remove the temp file:
597:
598: unlink($TempFile);
599:
600: return 1;
601: }
602:
603:
604: #
605: # ConfigFileFromSelector: converts a configuration file selector
606: # into a configuration file pathname.
607: # Supports the following file selectors:
608: # hosts, domain, dns_hosts, dns_domain
609: #
610: #
611: # Parameters:
612: # selector - Configuration file selector.
613: # Returns:
614: # Full path to the file or undef if the selector is invalid.
615: #
616: sub ConfigFileFromSelector {
617: my $selector = shift;
618: my $tablefile;
619:
620: my $tabledir = $perlvar{'lonTabDir'}.'/';
621: if (($selector eq "hosts") || ($selector eq "domain") ||
622: ($selector eq "dns_hosts") || ($selector eq "dns_domain")) {
623: $tablefile = $tabledir.$selector.'.tab';
624: }
625: return $tablefile;
626: }
627: #
628: # PushFile: Called to do an administrative push of a file.
629: # - Ensure the file being pushed is one we support.
630: # - Backup the old file to <filename.saved>
631: # - Separate the contents of the new file out from the
632: # rest of the request.
633: # - Write the new file.
634: # Parameter:
635: # Request - The entire user request. This consists of a : separated
636: # string pushfile:tablename:contents.
637: # NOTE: The contents may have :'s in it as well making things a bit
638: # more interesting... but not much.
639: # Returns:
640: # String to send to client ("ok" or "refused" if bad file).
641: #
642: sub PushFile {
643: my $request = shift;
644: my ($command, $filename, $contents) = split(":", $request, 3);
645: &Debug("PushFile");
646:
647: # At this point in time, pushes for only the following tables are
648: # supported:
649: # hosts.tab ($filename eq host).
650: # domain.tab ($filename eq domain).
651: # dns_hosts.tab ($filename eq dns_host).
652: # dns_domain.tab ($filename eq dns_domain).
653: # Construct the destination filename or reject the request.
654: #
655: # lonManage is supposed to ensure this, however this session could be
656: # part of some elaborate spoof that managed somehow to authenticate.
657: #
658:
659:
660: my $tablefile = ConfigFileFromSelector($filename);
661: if(! (defined $tablefile)) {
662: return "refused";
663: }
664:
665: # If the file being pushed is the host file, we adjust the entry for ourself so that the
666: # IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible
667: # to conceive of conditions where we don't have a DNS entry locally. This is possible in a
668: # network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
669: # that possibilty.
670:
671: if($filename eq "host") {
672: $contents = AdjustHostContents($contents);
673: }
674:
675: # Install the new file:
676:
677: &logthis("Installing new $tablefile contents:\n$contents");
678: if(!InstallFile($tablefile, $contents)) {
679: &logthis('<font color="red"> Pushfile: unable to install '
680: .$tablefile." $! </font>");
681: return "error:$!";
682: } else {
683: &logthis('<font color="green"> Installed new '.$tablefile
684: ." - transaction by: $clientname ($clientip)</font>");
685: my $adminmail = $perlvar{'lonAdmEMail'};
686: my $admindom = &Apache::lonnet::host_domain($perlvar{'lonHostID'});
687: if ($admindom ne '') {
688: my %domconfig =
689: &Apache::lonnet::get_dom('configuration',['contacts'],$admindom);
690: if (ref($domconfig{'contacts'}) eq 'HASH') {
691: if ($domconfig{'contacts'}{'adminemail'} ne '') {
692: $adminmail = $domconfig{'contacts'}{'adminemail'};
693: }
694: }
695: }
696: if ($adminmail =~ /^[^\@]+\@[^\@]+$/) {
697: my $msg = new Mail::Send;
698: $msg->to($adminmail);
699: $msg->subject('LON-CAPA DNS update on '.$perlvar{'lonHostID'});
700: $msg->add('Content-type','text/plain; charset=UTF-8');
701: if (my $fh = $msg->open()) {
702: print $fh 'Update to '.$tablefile.' from Cluster Manager '.
703: "$clientname ($clientip)\n";
704: $fh->close;
705: }
706: }
707: }
708:
709: # Indicate success:
710:
711: return "ok";
712:
713: }
714:
715: #
716: # Called to re-init either lonc or lond.
717: #
718: # Parameters:
719: # request - The full request by the client. This is of the form
720: # reinit:<process>
721: # where <process> is allowed to be either of
722: # lonc or lond
723: #
724: # Returns:
725: # The string to be sent back to the client either:
726: # ok - Everything worked just fine.
727: # error:why - There was a failure and why describes the reason.
728: #
729: #
730: sub ReinitProcess {
731: my $request = shift;
732:
733:
734: # separate the request (reinit) from the process identifier and
735: # validate it producing the name of the .pid file for the process.
736: #
737: #
738: my ($junk, $process) = split(":", $request);
739: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
740: if($process eq 'lonc') {
741: $processpidfile = $processpidfile."lonc.pid";
742: if (!open(PIDFILE, "< $processpidfile")) {
743: return "error:Open failed for $processpidfile";
744: }
745: my $loncpid = <PIDFILE>;
746: close(PIDFILE);
747: logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
748: ."</font>");
749: kill("USR2", $loncpid);
750: } elsif ($process eq 'lond') {
751: logthis('<font color="red"> Reinitializing self (lond) </font>');
752: &UpdateHosts; # Lond is us!!
753: } else {
754: &logthis('<font color="yellow" Invalid reinit request for '.$process
755: ."</font>");
756: return "error:Invalid process identifier $process";
757: }
758: return 'ok';
759: }
760: # Validate a line in a configuration file edit script:
761: # Validation includes:
762: # - Ensuring the command is valid.
763: # - Ensuring the command has sufficient parameters
764: # Parameters:
765: # scriptline - A line to validate (\n has been stripped for what it's worth).
766: #
767: # Return:
768: # 0 - Invalid scriptline.
769: # 1 - Valid scriptline
770: # NOTE:
771: # Only the command syntax is checked, not the executability of the
772: # command.
773: #
774: sub isValidEditCommand {
775: my $scriptline = shift;
776:
777: # Line elements are pipe separated:
778:
779: my ($command, $key, $newline) = split(/\|/, $scriptline);
780: &logthis('<font color="green"> isValideditCommand checking: '.
781: "Command = '$command', Key = '$key', Newline = '$newline' </font>\n");
782:
783: if ($command eq "delete") {
784: #
785: # key with no newline.
786: #
787: if( ($key eq "") || ($newline ne "")) {
788: return 0; # Must have key but no newline.
789: } else {
790: return 1; # Valid syntax.
791: }
792: } elsif ($command eq "replace") {
793: #
794: # key and newline:
795: #
796: if (($key eq "") || ($newline eq "")) {
797: return 0;
798: } else {
799: return 1;
800: }
801: } elsif ($command eq "append") {
802: if (($key ne "") && ($newline eq "")) {
803: return 1;
804: } else {
805: return 0;
806: }
807: } else {
808: return 0; # Invalid command.
809: }
810: return 0; # Should not get here!!!
811: }
812: #
813: # ApplyEdit - Applies an edit command to a line in a configuration
814: # file. It is the caller's responsiblity to validate the
815: # edit line.
816: # Parameters:
817: # $directive - A single edit directive to apply.
818: # Edit directives are of the form:
819: # append|newline - Appends a new line to the file.
820: # replace|key|newline - Replaces the line with key value 'key'
821: # delete|key - Deletes the line with key value 'key'.
822: # $editor - A config file editor object that contains the
823: # file being edited.
824: #
825: sub ApplyEdit {
826:
827: my ($directive, $editor) = @_;
828:
829: # Break the directive down into its command and its parameters
830: # (at most two at this point. The meaning of the parameters, if in fact
831: # they exist depends on the command).
832:
833: my ($command, $p1, $p2) = split(/\|/, $directive);
834:
835: if($command eq "append") {
836: $editor->Append($p1); # p1 - key p2 null.
837: } elsif ($command eq "replace") {
838: $editor->ReplaceLine($p1, $p2); # p1 - key p2 = newline.
839: } elsif ($command eq "delete") {
840: $editor->DeleteLine($p1); # p1 - key p2 null.
841: } else { # Should not get here!!!
842: die "Invalid command given to ApplyEdit $command"
843: }
844: }
845: #
846: # AdjustOurHost:
847: # Adjusts a host file stored in a configuration file editor object
848: # for the true IP address of this host. This is necessary for hosts
849: # that live behind a firewall.
850: # Those hosts have a publicly distributed IP of the firewall, but
851: # internally must use their actual IP. We assume that a given
852: # host only has a single IP interface for now.
853: # Formal Parameters:
854: # editor - The configuration file editor to adjust. This
855: # editor is assumed to contain a hosts.tab file.
856: # Strategy:
857: # - Figure out our hostname.
858: # - Lookup the entry for this host.
859: # - Modify the line to contain our IP
860: # - Do a replace for this host.
861: sub AdjustOurHost {
862: my $editor = shift;
863:
864: # figure out who I am.
865:
866: my $myHostName = $perlvar{'lonHostID'}; # LonCAPA hostname.
867:
868: # Get my host file entry.
869:
870: my $ConfigLine = $editor->Find($myHostName);
871: if(! (defined $ConfigLine)) {
872: die "AdjustOurHost - no entry for me in hosts file $myHostName";
873: }
874: # figure out my IP:
875: # Use the config line to get my hostname.
876: # Use gethostbyname to translate that into an IP address.
877: #
878: my ($id,$domain,$role,$name,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);
879: #
880: # Reassemble the config line from the elements in the list.
881: # Note that if the loncnew items were not present before, they will
882: # be now even if they would be empty
883: #
884: my $newConfigLine = $id;
885: foreach my $item ($domain, $role, $name, $maxcon, $idleto, $mincon) {
886: $newConfigLine .= ":".$item;
887: }
888: # Replace the line:
889:
890: $editor->ReplaceLine($id, $newConfigLine);
891:
892: }
893: #
894: # ReplaceConfigFile:
895: # Replaces a configuration file with the contents of a
896: # configuration file editor object.
897: # This is done by:
898: # - Copying the target file to <filename>.old
899: # - Writing the new file to <filename>.tmp
900: # - Moving <filename.tmp> -> <filename>
901: # This laborious process ensures that the system is never without
902: # a configuration file that's at least valid (even if the contents
903: # may be dated).
904: # Parameters:
905: # filename - Name of the file to modify... this is a full path.
906: # editor - Editor containing the file.
907: #
908: sub ReplaceConfigFile {
909:
910: my ($filename, $editor) = @_;
911:
912: CopyFile ($filename, $filename.".old");
913:
914: my $contents = $editor->Get(); # Get the contents of the file.
915:
916: InstallFile($filename, $contents);
917: }
918: #
919: #
920: # Called to edit a configuration table file
921: # Parameters:
922: # request - The entire command/request sent by lonc or lonManage
923: # Return:
924: # The reply to send to the client.
925: #
926: sub EditFile {
927: my $request = shift;
928:
929: # Split the command into it's pieces: edit:filetype:script
930:
931: my ($cmd, $filetype, $script) = split(/:/, $request,3); # : in script
932:
933: # Check the pre-coditions for success:
934:
935: if($cmd != "edit") { # Something is amiss afoot alack.
936: return "error:edit request detected, but request != 'edit'\n";
937: }
938: if( ($filetype ne "hosts") &&
939: ($filetype ne "domain")) {
940: return "error:edit requested with invalid file specifier: $filetype \n";
941: }
942:
943: # Split the edit script and check it's validity.
944:
945: my @scriptlines = split(/\n/, $script); # one line per element.
946: my $linecount = scalar(@scriptlines);
947: for(my $i = 0; $i < $linecount; $i++) {
948: chomp($scriptlines[$i]);
949: if(!isValidEditCommand($scriptlines[$i])) {
950: return "error:edit with bad script line: '$scriptlines[$i]' \n";
951: }
952: }
953:
954: # Execute the edit operation.
955: # - Create a config file editor for the appropriate file and
956: # - execute each command in the script:
957: #
958: my $configfile = ConfigFileFromSelector($filetype);
959: if (!(defined $configfile)) {
960: return "refused\n";
961: }
962: my $editor = ConfigFileEdit->new($configfile);
963:
964: for (my $i = 0; $i < $linecount; $i++) {
965: ApplyEdit($scriptlines[$i], $editor);
966: }
967: # If the file is the host file, ensure that our host is
968: # adjusted to have our ip:
969: #
970: if($filetype eq "host") {
971: AdjustOurHost($editor);
972: }
973: # Finally replace the current file with our file.
974: #
975: ReplaceConfigFile($configfile, $editor);
976:
977: return "ok\n";
978: }
979:
980: # read_profile
981: #
982: # Returns a set of specific entries from a user's profile file.
983: # this is a utility function that is used by both get_profile_entry and
984: # get_profile_entry_encrypted.
985: #
986: # Parameters:
987: # udom - Domain in which the user exists.
988: # uname - User's account name (loncapa account)
989: # namespace - The profile namespace to open.
990: # what - A set of & separated queries.
991: # Returns:
992: # If all ok: - The string that needs to be shipped back to the user.
993: # If failure - A string that starts with error: followed by the failure
994: # reason.. note that this probabyl gets shipped back to the
995: # user as well.
996: #
997: sub read_profile {
998: my ($udom, $uname, $namespace, $what) = @_;
999:
1000: my $hashref = &tie_user_hash($udom, $uname, $namespace,
1001: &GDBM_READER());
1002: if ($hashref) {
1003: my @queries=split(/\&/,$what);
1004: if ($namespace eq 'roles') {
1005: @queries = map { &unescape($_); } @queries;
1006: }
1007: my $qresult='';
1008:
1009: for (my $i=0;$i<=$#queries;$i++) {
1010: $qresult.="$hashref->{$queries[$i]}&"; # Presumably failure gives empty string.
1011: }
1012: $qresult=~s/\&$//; # Remove trailing & from last lookup.
1013: if (&untie_user_hash($hashref)) {
1014: return $qresult;
1015: } else {
1016: return "error: ".($!+0)." untie (GDBM) Failed";
1017: }
1018: } else {
1019: if ($!+0 == 2) {
1020: return "error:No such file or GDBM reported bad block error";
1021: } else {
1022: return "error: ".($!+0)." tie (GDBM) Failed";
1023: }
1024: }
1025:
1026: }
1027: #--------------------- Request Handlers --------------------------------------------
1028: #
1029: # By convention each request handler registers itself prior to the sub
1030: # declaration:
1031: #
1032:
1033: #++
1034: #
1035: # Handles ping requests.
1036: # Parameters:
1037: # $cmd - the actual keyword that invoked us.
1038: # $tail - the tail of the request that invoked us.
1039: # $replyfd- File descriptor connected to the client
1040: # Implicit Inputs:
1041: # $currenthostid - Global variable that carries the name of the host we are
1042: # known as.
1043: # Returns:
1044: # 1 - Ok to continue processing.
1045: # 0 - Program should exit.
1046: # Side effects:
1047: # Reply information is sent to the client.
1048: sub ping_handler {
1049: my ($cmd, $tail, $client) = @_;
1050: Debug("$cmd $tail $client .. $currenthostid:");
1051:
1052: Reply( $client,\$currenthostid,"$cmd:$tail");
1053:
1054: return 1;
1055: }
1056: ®ister_handler("ping", \&ping_handler, 0, 1, 1); # Ping unencoded, client or manager.
1057:
1058: #++
1059: #
1060: # Handles pong requests. Pong replies with our current host id, and
1061: # the results of a ping sent to us via our lonc.
1062: #
1063: # Parameters:
1064: # $cmd - the actual keyword that invoked us.
1065: # $tail - the tail of the request that invoked us.
1066: # $replyfd- File descriptor connected to the client
1067: # Implicit Inputs:
1068: # $currenthostid - Global variable that carries the name of the host we are
1069: # connected to.
1070: # Returns:
1071: # 1 - Ok to continue processing.
1072: # 0 - Program should exit.
1073: # Side effects:
1074: # Reply information is sent to the client.
1075: sub pong_handler {
1076: my ($cmd, $tail, $replyfd) = @_;
1077:
1078: my $reply=&Apache::lonnet::reply("ping",$clientname);
1079: &Reply( $replyfd, "$currenthostid:$reply\n", "$cmd:$tail");
1080: return 1;
1081: }
1082: ®ister_handler("pong", \&pong_handler, 0, 1, 1); # Pong unencoded, client or manager
1083:
1084: #++
1085: # Called to establish an encrypted session key with the remote client.
1086: # Note that with secure lond, in most cases this function is never
1087: # invoked. Instead, the secure session key is established either
1088: # via a local file that's locked down tight and only lives for a short
1089: # time, or via an ssl tunnel...and is generated from a bunch-o-random
1090: # bits from /dev/urandom, rather than the predictable pattern used by
1091: # by this sub. This sub is only used in the old-style insecure
1092: # key negotiation.
1093: # Parameters:
1094: # $cmd - the actual keyword that invoked us.
1095: # $tail - the tail of the request that invoked us.
1096: # $replyfd- File descriptor connected to the client
1097: # Implicit Inputs:
1098: # $currenthostid - Global variable that carries the name of the host
1099: # known as.
1100: # $clientname - Global variable that carries the name of the host we're connected to.
1101: # Returns:
1102: # 1 - Ok to continue processing.
1103: # 0 - Program should exit.
1104: # Implicit Outputs:
1105: # Reply information is sent to the client.
1106: # $cipher is set with a reference to a new IDEA encryption object.
1107: #
1108: sub establish_key_handler {
1109: my ($cmd, $tail, $replyfd) = @_;
1110:
1111: my $buildkey=time.$$.int(rand 100000);
1112: $buildkey=~tr/1-6/A-F/;
1113: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
1114: my $key=$currenthostid.$clientname;
1115: $key=~tr/a-z/A-Z/;
1116: $key=~tr/G-P/0-9/;
1117: $key=~tr/Q-Z/0-9/;
1118: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
1119: $key=substr($key,0,32);
1120: my $cipherkey=pack("H32",$key);
1121: $cipher=new IDEA $cipherkey;
1122: &Reply($replyfd, \$buildkey, "$cmd:$tail");
1123:
1124: return 1;
1125:
1126: }
1127: ®ister_handler("ekey", \&establish_key_handler, 0, 1,1);
1128:
1129: # Handler for the load command. Returns the current system load average
1130: # to the requestor.
1131: #
1132: # Parameters:
1133: # $cmd - the actual keyword that invoked us.
1134: # $tail - the tail of the request that invoked us.
1135: # $replyfd- File descriptor connected to the client
1136: # Implicit Inputs:
1137: # $currenthostid - Global variable that carries the name of the host
1138: # known as.
1139: # $clientname - Global variable that carries the name of the host we're connected to.
1140: # Returns:
1141: # 1 - Ok to continue processing.
1142: # 0 - Program should exit.
1143: # Side effects:
1144: # Reply information is sent to the client.
1145: sub load_handler {
1146: my ($cmd, $tail, $replyfd) = @_;
1147:
1148:
1149:
1150: # Get the load average from /proc/loadavg and calculate it as a percentage of
1151: # the allowed load limit as set by the perl global variable lonLoadLim
1152:
1153: my $loadavg;
1154: my $loadfile=IO::File->new('/proc/loadavg');
1155:
1156: $loadavg=<$loadfile>;
1157: $loadavg =~ s/\s.*//g; # Extract the first field only.
1158:
1159: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1160:
1161: &Reply( $replyfd, \$loadpercent, "$cmd:$tail");
1162:
1163: return 1;
1164: }
1165: ®ister_handler("load", \&load_handler, 0, 1, 0);
1166:
1167: #
1168: # Process the userload request. This sub returns to the client the current
1169: # user load average. It can be invoked either by clients or managers.
1170: #
1171: # Parameters:
1172: # $cmd - the actual keyword that invoked us.
1173: # $tail - the tail of the request that invoked us.
1174: # $replyfd- File descriptor connected to the client
1175: # Implicit Inputs:
1176: # $currenthostid - Global variable that carries the name of the host
1177: # known as.
1178: # $clientname - Global variable that carries the name of the host we're connected to.
1179: # Returns:
1180: # 1 - Ok to continue processing.
1181: # 0 - Program should exit
1182: # Implicit inputs:
1183: # whatever the userload() function requires.
1184: # Implicit outputs:
1185: # the reply is written to the client.
1186: #
1187: sub user_load_handler {
1188: my ($cmd, $tail, $replyfd) = @_;
1189:
1190: my $userloadpercent=&Apache::lonnet::userload();
1191: &Reply($replyfd, \$userloadpercent, "$cmd:$tail");
1192:
1193: return 1;
1194: }
1195: ®ister_handler("userload", \&user_load_handler, 0, 1, 0);
1196:
1197: # Process a request for the authorization type of a user:
1198: # (userauth).
1199: #
1200: # Parameters:
1201: # $cmd - the actual keyword that invoked us.
1202: # $tail - the tail of the request that invoked us.
1203: # $replyfd- File descriptor connected to the client
1204: # Returns:
1205: # 1 - Ok to continue processing.
1206: # 0 - Program should exit
1207: # Implicit outputs:
1208: # The user authorization type is written to the client.
1209: #
1210: sub user_authorization_type {
1211: my ($cmd, $tail, $replyfd) = @_;
1212:
1213: my $userinput = "$cmd:$tail";
1214:
1215: # Pull the domain and username out of the command tail.
1216: # and call get_auth_type to determine the authentication type.
1217:
1218: my ($udom,$uname)=split(/:/,$tail);
1219: my $result = &get_auth_type($udom, $uname);
1220: if($result eq "nouser") {
1221: &Failure( $replyfd, "unknown_user\n", $userinput);
1222: } else {
1223: #
1224: # We only want to pass the second field from get_auth_type
1225: # for ^krb.. otherwise we'll be handing out the encrypted
1226: # password for internals e.g.
1227: #
1228: my ($type,$otherinfo) = split(/:/,$result);
1229: if($type =~ /^krb/) {
1230: $type = $result;
1231: } else {
1232: $type .= ':';
1233: }
1234: &Reply( $replyfd, \$type, $userinput);
1235: }
1236:
1237: return 1;
1238: }
1239: ®ister_handler("currentauth", \&user_authorization_type, 1, 1, 0);
1240:
1241: # Process a request by a manager to push a hosts or domain table
1242: # to us. We pick apart the command and pass it on to the subs
1243: # that already exist to do this.
1244: #
1245: # Parameters:
1246: # $cmd - the actual keyword that invoked us.
1247: # $tail - the tail of the request that invoked us.
1248: # $client - File descriptor connected to the client
1249: # Returns:
1250: # 1 - Ok to continue processing.
1251: # 0 - Program should exit
1252: # Implicit Output:
1253: # a reply is written to the client.
1254: sub push_file_handler {
1255: my ($cmd, $tail, $client) = @_;
1256: &Debug("In push file handler");
1257: my $userinput = "$cmd:$tail";
1258:
1259: # At this time we only know that the IP of our partner is a valid manager
1260: # the code below is a hook to do further authentication (e.g. to resolve
1261: # spoofing).
1262:
1263: my $cert = &GetCertificate($userinput);
1264: if(&ValidManager($cert)) {
1265: &Debug("Valid manager: $client");
1266:
1267: # Now presumably we have the bona fides of both the peer host and the
1268: # process making the request.
1269:
1270: my $reply = &PushFile($userinput);
1271: &Reply($client, \$reply, $userinput);
1272:
1273: } else {
1274: &logthis("push_file_handler $client is not valid");
1275: &Failure( $client, "refused\n", $userinput);
1276: }
1277: return 1;
1278: }
1279: ®ister_handler("pushfile", \&push_file_handler, 1, 0, 1);
1280:
1281: # The du_handler routine should be considered obsolete and is retained
1282: # for communication with legacy servers. Please see the du2_handler.
1283: #
1284: # du - list the disk usage of a directory recursively.
1285: #
1286: # note: stolen code from the ls file handler
1287: # under construction by Rick Banghart
1288: # .
1289: # Parameters:
1290: # $cmd - The command that dispatched us (du).
1291: # $ududir - The directory path to list... I'm not sure what this
1292: # is relative as things like ls:. return e.g.
1293: # no_such_dir.
1294: # $client - Socket open on the client.
1295: # Returns:
1296: # 1 - indicating that the daemon should not disconnect.
1297: # Side Effects:
1298: # The reply is written to $client.
1299: #
1300: sub du_handler {
1301: my ($cmd, $ududir, $client) = @_;
1302: ($ududir) = split(/:/,$ududir); # Make 'telnet' testing easier.
1303: my $userinput = "$cmd:$ududir";
1304:
1305: if ($ududir=~/\.\./ || $ududir!~m|^/home/httpd/|) {
1306: &Failure($client,"refused\n","$cmd:$ududir");
1307: return 1;
1308: }
1309: # Since $ududir could have some nasties in it,
1310: # we will require that ududir is a valid
1311: # directory. Just in case someone tries to
1312: # slip us a line like .;(cd /home/httpd rm -rf*)
1313: # etc.
1314: #
1315: if (-d $ududir) {
1316: my $total_size=0;
1317: my $code=sub {
1318: if ($_=~/\.\d+\./) { return;}
1319: if ($_=~/\.meta$/) { return;}
1320: if (-d $_) { return;}
1321: $total_size+=(stat($_))[7];
1322: };
1323: chdir($ududir);
1324: find($code,$ududir);
1325: $total_size=int($total_size/1024);
1326: &Reply($client,\$total_size,"$cmd:$ududir");
1327: } else {
1328: &Failure($client, "bad_directory:$ududir\n","$cmd:$ududir");
1329: }
1330: return 1;
1331: }
1332: ®ister_handler("du", \&du_handler, 0, 1, 0);
1333:
1334: # Please also see the du_handler, which is obsoleted by du2.
1335: # du2_handler differs from du_handler in that required path to directory
1336: # provided by &propath() is prepended in the handler instead of on the
1337: # client side.
1338: #
1339: # du2 - list the disk usage of a directory recursively.
1340: #
1341: # Parameters:
1342: # $cmd - The command that dispatched us (du).
1343: # $tail - The tail of the request that invoked us.
1344: # $tail is a : separated list of the following:
1345: # - $ududir - directory path to list (before prepending)
1346: # - $getpropath = 1 if &propath() should prepend
1347: # - $uname - username to use for &propath or user dir
1348: # - $udom - domain to use for &propath or user dir
1349: # All are escaped.
1350: # $client - Socket open on the client.
1351: # Returns:
1352: # 1 - indicating that the daemon should not disconnect.
1353: # Side Effects:
1354: # The reply is written to $client.
1355: #
1356:
1357: sub du2_handler {
1358: my ($cmd, $tail, $client) = @_;
1359: my ($ududir,$getpropath,$uname,$udom) = map { &unescape($_) } (split(/:/, $tail));
1360: my $userinput = "$cmd:$tail";
1361: if (($ududir=~/\.\./) || (($ududir!~m|^/home/httpd/|) && (!$getpropath))) {
1362: &Failure($client,"refused\n","$cmd:$tail");
1363: return 1;
1364: }
1365: if ($getpropath) {
1366: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
1367: $ududir = &propath($udom,$uname).'/'.$ududir;
1368: } else {
1369: &Failure($client,"refused\n","$cmd:$tail");
1370: return 1;
1371: }
1372: }
1373: # Since $ududir could have some nasties in it,
1374: # we will require that ududir is a valid
1375: # directory. Just in case someone tries to
1376: # slip us a line like .;(cd /home/httpd rm -rf*)
1377: # etc.
1378: #
1379: if (-d $ududir) {
1380: my $total_size=0;
1381: my $code=sub {
1382: if ($_=~/\.\d+\./) { return;}
1383: if ($_=~/\.meta$/) { return;}
1384: if (-d $_) { return;}
1385: $total_size+=(stat($_))[7];
1386: };
1387: chdir($ududir);
1388: find($code,$ududir);
1389: $total_size=int($total_size/1024);
1390: &Reply($client,\$total_size,"$cmd:$ududir");
1391: } else {
1392: &Failure($client, "bad_directory:$ududir\n","$cmd:$tail");
1393: }
1394: return 1;
1395: }
1396: ®ister_handler("du2", \&du2_handler, 0, 1, 0);
1397:
1398: #
1399: # The ls_handler routine should be considered obsolete and is retained
1400: # for communication with legacy servers. Please see the ls3_handler.
1401: #
1402: # ls - list the contents of a directory. For each file in the
1403: # selected directory the filename followed by the full output of
1404: # the stat function is returned. The returned info for each
1405: # file are separated by ':'. The stat fields are separated by &'s.
1406: # Parameters:
1407: # $cmd - The command that dispatched us (ls).
1408: # $ulsdir - The directory path to list... I'm not sure what this
1409: # is relative as things like ls:. return e.g.
1410: # no_such_dir.
1411: # $client - Socket open on the client.
1412: # Returns:
1413: # 1 - indicating that the daemon should not disconnect.
1414: # Side Effects:
1415: # The reply is written to $client.
1416: #
1417: sub ls_handler {
1418: # obsoleted by ls2_handler
1419: my ($cmd, $ulsdir, $client) = @_;
1420:
1421: my $userinput = "$cmd:$ulsdir";
1422:
1423: my $obs;
1424: my $rights;
1425: my $ulsout='';
1426: my $ulsfn;
1427: if (-e $ulsdir) {
1428: if(-d $ulsdir) {
1429: if (opendir(LSDIR,$ulsdir)) {
1430: while ($ulsfn=readdir(LSDIR)) {
1431: undef($obs);
1432: undef($rights);
1433: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1434: #We do some obsolete checking here
1435: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1436: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1437: my @obsolete=<FILE>;
1438: foreach my $obsolete (@obsolete) {
1439: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1440: if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
1441: }
1442: }
1443: $ulsout.=$ulsfn.'&'.join('&',@ulsstats);
1444: if($obs eq '1') { $ulsout.="&1"; }
1445: else { $ulsout.="&0"; }
1446: if($rights eq '1') { $ulsout.="&1:"; }
1447: else { $ulsout.="&0:"; }
1448: }
1449: closedir(LSDIR);
1450: }
1451: } else {
1452: my @ulsstats=stat($ulsdir);
1453: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1454: }
1455: } else {
1456: $ulsout='no_such_dir';
1457: }
1458: if ($ulsout eq '') { $ulsout='empty'; }
1459: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1460:
1461: return 1;
1462:
1463: }
1464: ®ister_handler("ls", \&ls_handler, 0, 1, 0);
1465:
1466: # The ls2_handler routine should be considered obsolete and is retained
1467: # for communication with legacy servers. Please see the ls3_handler.
1468: # Please also see the ls_handler, which was itself obsoleted by ls2.
1469: # ls2_handler differs from ls_handler in that it escapes its return
1470: # values before concatenating them together with ':'s.
1471: #
1472: # ls2 - list the contents of a directory. For each file in the
1473: # selected directory the filename followed by the full output of
1474: # the stat function is returned. The returned info for each
1475: # file are separated by ':'. The stat fields are separated by &'s.
1476: # Parameters:
1477: # $cmd - The command that dispatched us (ls).
1478: # $ulsdir - The directory path to list... I'm not sure what this
1479: # is relative as things like ls:. return e.g.
1480: # no_such_dir.
1481: # $client - Socket open on the client.
1482: # Returns:
1483: # 1 - indicating that the daemon should not disconnect.
1484: # Side Effects:
1485: # The reply is written to $client.
1486: #
1487: sub ls2_handler {
1488: my ($cmd, $ulsdir, $client) = @_;
1489:
1490: my $userinput = "$cmd:$ulsdir";
1491:
1492: my $obs;
1493: my $rights;
1494: my $ulsout='';
1495: my $ulsfn;
1496: if (-e $ulsdir) {
1497: if(-d $ulsdir) {
1498: if (opendir(LSDIR,$ulsdir)) {
1499: while ($ulsfn=readdir(LSDIR)) {
1500: undef($obs);
1501: undef($rights);
1502: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1503: #We do some obsolete checking here
1504: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1505: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1506: my @obsolete=<FILE>;
1507: foreach my $obsolete (@obsolete) {
1508: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1509: if($obsolete =~ m|(<copyright>)(default)|) {
1510: $rights = 1;
1511: }
1512: }
1513: }
1514: my $tmp = $ulsfn.'&'.join('&',@ulsstats);
1515: if ($obs eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1516: if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1517: $ulsout.= &escape($tmp).':';
1518: }
1519: closedir(LSDIR);
1520: }
1521: } else {
1522: my @ulsstats=stat($ulsdir);
1523: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1524: }
1525: } else {
1526: $ulsout='no_such_dir';
1527: }
1528: if ($ulsout eq '') { $ulsout='empty'; }
1529: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1530: return 1;
1531: }
1532: ®ister_handler("ls2", \&ls2_handler, 0, 1, 0);
1533: #
1534: # ls3 - list the contents of a directory. For each file in the
1535: # selected directory the filename followed by the full output of
1536: # the stat function is returned. The returned info for each
1537: # file are separated by ':'. The stat fields are separated by &'s.
1538: # Parameters:
1539: # $cmd - The command that dispatched us (ls).
1540: # $tail - The tail of the request that invoked us.
1541: # $tail is a : separated list of the following:
1542: # - $ulsdir - directory path to list (before prepending)
1543: # - $getpropath = 1 if &propath() should prepend
1544: # - $getuserdir = 1 if path to user dir in lonUsers should
1545: # prepend
1546: # - $alternate_root - path to prepend
1547: # - $uname - username to use for &propath or user dir
1548: # - $udom - domain to use for &propath or user dir
1549: # All of these except $getpropath and &getuserdir are escaped.
1550: # no_such_dir.
1551: # $client - Socket open on the client.
1552: # Returns:
1553: # 1 - indicating that the daemon should not disconnect.
1554: # Side Effects:
1555: # The reply is written to $client.
1556: #
1557:
1558: sub ls3_handler {
1559: my ($cmd, $tail, $client) = @_;
1560: my $userinput = "$cmd:$tail";
1561: my ($ulsdir,$getpropath,$getuserdir,$alternate_root,$uname,$udom) =
1562: split(/:/,$tail);
1563: if (defined($ulsdir)) {
1564: $ulsdir = &unescape($ulsdir);
1565: }
1566: if (defined($alternate_root)) {
1567: $alternate_root = &unescape($alternate_root);
1568: }
1569: if (defined($uname)) {
1570: $uname = &unescape($uname);
1571: }
1572: if (defined($udom)) {
1573: $udom = &unescape($udom);
1574: }
1575:
1576: my $dir_root = $perlvar{'lonDocRoot'};
1577: if ($getpropath) {
1578: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
1579: $dir_root = &propath($udom,$uname);
1580: $dir_root =~ s/\/$//;
1581: } else {
1582: &Failure($client,"refused\n","$cmd:$tail");
1583: return 1;
1584: }
1585: } elsif ($getuserdir) {
1586: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
1587: my $subdir=$uname.'__';
1588: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
1589: $dir_root = $Apache::lonnet::perlvar{'lonUsersDir'}
1590: ."/$udom/$subdir/$uname";
1591: } else {
1592: &Failure($client,"refused\n","$cmd:$tail");
1593: return 1;
1594: }
1595: } elsif ($alternate_root ne '') {
1596: $dir_root = $alternate_root;
1597: }
1598: if (($dir_root ne '') && ($dir_root ne '/')) {
1599: if ($ulsdir =~ /^\//) {
1600: $ulsdir = $dir_root.$ulsdir;
1601: } else {
1602: $ulsdir = $dir_root.'/'.$ulsdir;
1603: }
1604: }
1605: my $obs;
1606: my $rights;
1607: my $ulsout='';
1608: my $ulsfn;
1609: if (-e $ulsdir) {
1610: if(-d $ulsdir) {
1611: if (opendir(LSDIR,$ulsdir)) {
1612: while ($ulsfn=readdir(LSDIR)) {
1613: undef($obs);
1614: undef($rights);
1615: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1616: #We do some obsolete checking here
1617: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1618: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1619: my @obsolete=<FILE>;
1620: foreach my $obsolete (@obsolete) {
1621: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1622: if($obsolete =~ m|(<copyright>)(default)|) {
1623: $rights = 1;
1624: }
1625: }
1626: }
1627: my $tmp = $ulsfn.'&'.join('&',@ulsstats);
1628: if ($obs eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1629: if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1630: $ulsout.= &escape($tmp).':';
1631: }
1632: closedir(LSDIR);
1633: }
1634: } else {
1635: my @ulsstats=stat($ulsdir);
1636: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1637: }
1638: } else {
1639: $ulsout='no_such_dir';
1640: }
1641: if ($ulsout eq '') { $ulsout='empty'; }
1642: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1643: return 1;
1644: }
1645: ®ister_handler("ls3", \&ls3_handler, 0, 1, 0);
1646:
1647: sub read_lonnet_global {
1648: my ($cmd,$tail,$client) = @_;
1649: my $userinput = "$cmd:$tail";
1650: my $requested = &Apache::lonnet::thaw_unescape($tail);
1651: my $result;
1652: my %packagevars = (
1653: spareid => \%Apache::lonnet::spareid,
1654: perlvar => \%Apache::lonnet::perlvar,
1655: );
1656: my %limit_to = (
1657: perlvar => {
1658: lonOtherAuthen => 1,
1659: lonBalancer => 1,
1660: lonVersion => 1,
1661: lonSysEMail => 1,
1662: lonHostID => 1,
1663: lonRole => 1,
1664: lonDefDomain => 1,
1665: lonLoadLim => 1,
1666: lonUserLoadLim => 1,
1667: }
1668: );
1669: if (ref($requested) eq 'HASH') {
1670: foreach my $what (keys(%{$requested})) {
1671: my $response;
1672: my $items = {};
1673: if (exists($packagevars{$what})) {
1674: if (ref($limit_to{$what}) eq 'HASH') {
1675: foreach my $varname (keys(%{$packagevars{$what}})) {
1676: if ($limit_to{$what}{$varname}) {
1677: $items->{$varname} = $packagevars{$what}{$varname};
1678: }
1679: }
1680: } else {
1681: $items = $packagevars{$what};
1682: }
1683: if ($what eq 'perlvar') {
1684: if (!exists($packagevars{$what}{'lonBalancer'})) {
1685: if ($dist =~ /^(centos|rhes|fedora|scientific)/) {
1686: my $othervarref=LONCAPA::Configuration::read_conf('httpd.conf');
1687: if (ref($othervarref) eq 'HASH') {
1688: $items->{'lonBalancer'} = $othervarref->{'lonBalancer'};
1689: }
1690: }
1691: }
1692: }
1693: $response = &Apache::lonnet::freeze_escape($items);
1694: }
1695: $result .= &escape($what).'='.$response.'&';
1696: }
1697: }
1698: $result =~ s/\&$//;
1699: &Reply($client,\$result,$userinput);
1700: return 1;
1701: }
1702: ®ister_handler("readlonnetglobal", \&read_lonnet_global, 0, 1, 0);
1703:
1704: sub server_devalidatecache_handler {
1705: my ($cmd,$tail,$client) = @_;
1706: my $userinput = "$cmd:$tail";
1707: my ($name,$id) = map { &unescape($_); } split(/:/,$tail);
1708: &Apache::lonnet::devalidate_cache_new($name,$id);
1709: my $result = 'ok';
1710: &Reply($client,\$result,$userinput);
1711: return 1;
1712: }
1713: ®ister_handler("devalidatecache", \&server_devalidatecache_handler, 0, 1, 0);
1714:
1715: sub server_timezone_handler {
1716: my ($cmd,$tail,$client) = @_;
1717: my $userinput = "$cmd:$tail";
1718: my $timezone;
1719: my $clockfile = '/etc/sysconfig/clock'; # Fedora/CentOS/SuSE
1720: my $tzfile = '/etc/timezone'; # Debian/Ubuntu
1721: if (-e $clockfile) {
1722: if (open(my $fh,"<$clockfile")) {
1723: while (<$fh>) {
1724: next if (/^[\#\s]/);
1725: if (/^(?:TIME)?ZONE\s*=\s*['"]?\s*([\w\/]+)/) {
1726: $timezone = $1;
1727: last;
1728: }
1729: }
1730: close($fh);
1731: }
1732: } elsif (-e $tzfile) {
1733: if (open(my $fh,"<$tzfile")) {
1734: $timezone = <$fh>;
1735: close($fh);
1736: chomp($timezone);
1737: if ($timezone =~ m{^Etc/(\w+)$}) {
1738: $timezone = $1;
1739: }
1740: }
1741: }
1742: &Reply($client,\$timezone,$userinput); # This supports debug logging.
1743: return 1;
1744: }
1745: ®ister_handler("servertimezone", \&server_timezone_handler, 0, 1, 0);
1746:
1747: sub server_loncaparev_handler {
1748: my ($cmd,$tail,$client) = @_;
1749: my $userinput = "$cmd:$tail";
1750: &Reply($client,\$perlvar{'lonVersion'},$userinput);
1751: return 1;
1752: }
1753: ®ister_handler("serverloncaparev", \&server_loncaparev_handler, 0, 1, 0);
1754:
1755: sub server_homeID_handler {
1756: my ($cmd,$tail,$client) = @_;
1757: my $userinput = "$cmd:$tail";
1758: &Reply($client,\$perlvar{'lonHostID'},$userinput);
1759: return 1;
1760: }
1761: ®ister_handler("serverhomeID", \&server_homeID_handler, 0, 1, 0);
1762:
1763: sub server_distarch_handler {
1764: my ($cmd,$tail,$client) = @_;
1765: my $userinput = "$cmd:$tail";
1766: my $reply = &distro_and_arch();
1767: &Reply($client,\$reply,$userinput);
1768: return 1;
1769: }
1770: ®ister_handler("serverdistarch", \&server_distarch_handler, 0, 1, 0);
1771:
1772: # Process a reinit request. Reinit requests that either
1773: # lonc or lond be reinitialized so that an updated
1774: # host.tab or domain.tab can be processed.
1775: #
1776: # Parameters:
1777: # $cmd - the actual keyword that invoked us.
1778: # $tail - the tail of the request that invoked us.
1779: # $client - File descriptor connected to the client
1780: # Returns:
1781: # 1 - Ok to continue processing.
1782: # 0 - Program should exit
1783: # Implicit output:
1784: # a reply is sent to the client.
1785: #
1786: sub reinit_process_handler {
1787: my ($cmd, $tail, $client) = @_;
1788:
1789: my $userinput = "$cmd:$tail";
1790:
1791: my $cert = &GetCertificate($userinput);
1792: if(&ValidManager($cert)) {
1793: chomp($userinput);
1794: my $reply = &ReinitProcess($userinput);
1795: &Reply( $client, \$reply, $userinput);
1796: } else {
1797: &Failure( $client, "refused\n", $userinput);
1798: }
1799: return 1;
1800: }
1801: ®ister_handler("reinit", \&reinit_process_handler, 1, 0, 1);
1802:
1803: # Process the editing script for a table edit operation.
1804: # the editing operation must be encrypted and requested by
1805: # a manager host.
1806: #
1807: # Parameters:
1808: # $cmd - the actual keyword that invoked us.
1809: # $tail - the tail of the request that invoked us.
1810: # $client - File descriptor connected to the client
1811: # Returns:
1812: # 1 - Ok to continue processing.
1813: # 0 - Program should exit
1814: # Implicit output:
1815: # a reply is sent to the client.
1816: #
1817: sub edit_table_handler {
1818: my ($command, $tail, $client) = @_;
1819:
1820: my $userinput = "$command:$tail";
1821:
1822: my $cert = &GetCertificate($userinput);
1823: if(&ValidManager($cert)) {
1824: my($filetype, $script) = split(/:/, $tail);
1825: if (($filetype eq "hosts") ||
1826: ($filetype eq "domain")) {
1827: if($script ne "") {
1828: &Reply($client, # BUGBUG - EditFile
1829: &EditFile($userinput), # could fail.
1830: $userinput);
1831: } else {
1832: &Failure($client,"refused\n",$userinput);
1833: }
1834: } else {
1835: &Failure($client,"refused\n",$userinput);
1836: }
1837: } else {
1838: &Failure($client,"refused\n",$userinput);
1839: }
1840: return 1;
1841: }
1842: ®ister_handler("edit", \&edit_table_handler, 1, 0, 1);
1843:
1844: #
1845: # Authenticate a user against the LonCAPA authentication
1846: # database. Note that there are several authentication
1847: # possibilities:
1848: # - unix - The user can be authenticated against the unix
1849: # password file.
1850: # - internal - The user can be authenticated against a purely
1851: # internal per user password file.
1852: # - kerberos - The user can be authenticated against either a kerb4 or kerb5
1853: # ticket granting authority.
1854: # - user - The person tailoring LonCAPA can supply a user authentication
1855: # mechanism that is per system.
1856: #
1857: # Parameters:
1858: # $cmd - The command that got us here.
1859: # $tail - Tail of the command (remaining parameters).
1860: # $client - File descriptor connected to client.
1861: # Returns
1862: # 0 - Requested to exit, caller should shut down.
1863: # 1 - Continue processing.
1864: # Implicit inputs:
1865: # The authentication systems describe above have their own forms of implicit
1866: # input into the authentication process that are described above.
1867: #
1868: sub authenticate_handler {
1869: my ($cmd, $tail, $client) = @_;
1870:
1871:
1872: # Regenerate the full input line
1873:
1874: my $userinput = $cmd.":".$tail;
1875:
1876: # udom - User's domain.
1877: # uname - Username.
1878: # upass - User's password.
1879: # checkdefauth - Pass to validate_user() to try authentication
1880: # with default auth type(s) if no user account.
1881: # clientcancheckhost - Passed by clients with functionality in lonauth.pm
1882: # to check if session can be hosted.
1883:
1884: my ($udom, $uname, $upass, $checkdefauth, $clientcancheckhost)=split(/:/,$tail);
1885: &Debug(" Authenticate domain = $udom, user = $uname, password = $upass, checkdefauth = $checkdefauth");
1886: chomp($upass);
1887: $upass=&unescape($upass);
1888:
1889: my $pwdcorrect = &validate_user($udom,$uname,$upass,$checkdefauth);
1890: if($pwdcorrect) {
1891: my $canhost = 1;
1892: unless ($clientcancheckhost) {
1893: my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
1894: my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
1895: my @intdoms;
1896: my $internet_names = &Apache::lonnet::get_internet_names($clientname);
1897: if (ref($internet_names) eq 'ARRAY') {
1898: @intdoms = @{$internet_names};
1899: }
1900: unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
1901: my ($remote,$hosted);
1902: my $remotesession = &get_usersession_config($udom,'remotesession');
1903: if (ref($remotesession) eq 'HASH') {
1904: $remote = $remotesession->{'remote'}
1905: }
1906: my $hostedsession = &get_usersession_config($clienthomedom,'hostedsession');
1907: if (ref($hostedsession) eq 'HASH') {
1908: $hosted = $hostedsession->{'hosted'};
1909: }
1910: my $loncaparev = $clientversion;
1911: if ($loncaparev eq '') {
1912: $loncaparev = $Apache::lonnet::loncaparevs{$clientname};
1913: }
1914: $canhost = &Apache::lonnet::can_host_session($udom,$clientname,
1915: $loncaparev,
1916: $remote,$hosted);
1917: }
1918: }
1919: if ($canhost) {
1920: &Reply( $client, "authorized\n", $userinput);
1921: } else {
1922: &Reply( $client, "not_allowed_to_host\n", $userinput);
1923: }
1924: #
1925: # Bad credentials: Failed to authorize
1926: #
1927: } else {
1928: &Failure( $client, "non_authorized\n", $userinput);
1929: }
1930:
1931: return 1;
1932: }
1933: ®ister_handler("auth", \&authenticate_handler, 1, 1, 0);
1934:
1935: #
1936: # Change a user's password. Note that this function is complicated by
1937: # the fact that a user may be authenticated in more than one way:
1938: # At present, we are not able to change the password for all types of
1939: # authentication methods. Only for:
1940: # unix - unix password or shadow passoword style authentication.
1941: # local - Locally written authentication mechanism.
1942: # For now, kerb4 and kerb5 password changes are not supported and result
1943: # in an error.
1944: # FUTURE WORK:
1945: # Support kerberos passwd changes?
1946: # Parameters:
1947: # $cmd - The command that got us here.
1948: # $tail - Tail of the command (remaining parameters).
1949: # $client - File descriptor connected to client.
1950: # Returns
1951: # 0 - Requested to exit, caller should shut down.
1952: # 1 - Continue processing.
1953: # Implicit inputs:
1954: # The authentication systems describe above have their own forms of implicit
1955: # input into the authentication process that are described above.
1956: sub change_password_handler {
1957: my ($cmd, $tail, $client) = @_;
1958:
1959: my $userinput = $cmd.":".$tail; # Reconstruct client's string.
1960:
1961: #
1962: # udom - user's domain.
1963: # uname - Username.
1964: # upass - Current password.
1965: # npass - New password.
1966: # context - Context in which this was called
1967: # (preferences or reset_by_email).
1968: # lonhost - HostID of server where request originated
1969:
1970: my ($udom,$uname,$upass,$npass,$context,$lonhost)=split(/:/,$tail);
1971:
1972: $upass=&unescape($upass);
1973: $npass=&unescape($npass);
1974: &Debug("Trying to change password for $uname");
1975:
1976: # First require that the user can be authenticated with their
1977: # old password unless context was 'reset_by_email':
1978:
1979: my ($validated,$failure);
1980: if ($context eq 'reset_by_email') {
1981: if ($lonhost eq '') {
1982: $failure = 'invalid_client';
1983: } else {
1984: $validated = 1;
1985: }
1986: } else {
1987: $validated = &validate_user($udom, $uname, $upass);
1988: }
1989: if($validated) {
1990: my $realpasswd = &get_auth_type($udom, $uname); # Defined since authd.
1991:
1992: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1993: if ($howpwd eq 'internal') {
1994: &Debug("internal auth");
1995: my $salt=time;
1996: $salt=substr($salt,6,2);
1997: my $ncpass=crypt($npass,$salt);
1998: if(&rewrite_password_file($udom, $uname, "internal:$ncpass")) {
1999: my $msg="Result of password change for $uname: pwchange_success";
2000: if ($lonhost) {
2001: $msg .= " - request originated from: $lonhost";
2002: }
2003: &logthis($msg);
2004: &Reply($client, "ok\n", $userinput);
2005: } else {
2006: &logthis("Unable to open $uname passwd "
2007: ."to change password");
2008: &Failure( $client, "non_authorized\n",$userinput);
2009: }
2010: } elsif ($howpwd eq 'unix' && $context ne 'reset_by_email') {
2011: my $result = &change_unix_password($uname, $npass);
2012: &logthis("Result of password change for $uname: ".
2013: $result);
2014: &Reply($client, \$result, $userinput);
2015: } else {
2016: # this just means that the current password mode is not
2017: # one we know how to change (e.g the kerberos auth modes or
2018: # locally written auth handler).
2019: #
2020: &Failure( $client, "auth_mode_error\n", $userinput);
2021: }
2022:
2023: } else {
2024: if ($failure eq '') {
2025: $failure = 'non_authorized';
2026: }
2027: &Failure( $client, "$failure\n", $userinput);
2028: }
2029:
2030: return 1;
2031: }
2032: ®ister_handler("passwd", \&change_password_handler, 1, 1, 0);
2033:
2034: #
2035: # Create a new user. User in this case means a lon-capa user.
2036: # The user must either already exist in some authentication realm
2037: # like kerberos or the /etc/passwd. If not, a user completely local to
2038: # this loncapa system is created.
2039: #
2040: # Parameters:
2041: # $cmd - The command that got us here.
2042: # $tail - Tail of the command (remaining parameters).
2043: # $client - File descriptor connected to client.
2044: # Returns
2045: # 0 - Requested to exit, caller should shut down.
2046: # 1 - Continue processing.
2047: # Implicit inputs:
2048: # The authentication systems describe above have their own forms of implicit
2049: # input into the authentication process that are described above.
2050: sub add_user_handler {
2051:
2052: my ($cmd, $tail, $client) = @_;
2053:
2054:
2055: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
2056: my $userinput = $cmd.":".$tail; # Reconstruct the full request line.
2057:
2058: &Debug("cmd =".$cmd." $udom =".$udom." uname=".$uname);
2059:
2060:
2061: if($udom eq $currentdomainid) { # Reject new users for other domains...
2062:
2063: my $oldumask=umask(0077);
2064: chomp($npass);
2065: $npass=&unescape($npass);
2066: my $passfilename = &password_path($udom, $uname);
2067: &Debug("Password file created will be:".$passfilename);
2068: if (-e $passfilename) {
2069: &Failure( $client, "already_exists\n", $userinput);
2070: } else {
2071: my $fperror='';
2072: if (!&mkpath($passfilename)) {
2073: $fperror="error: ".($!+0)." mkdir failed while attempting "
2074: ."makeuser";
2075: }
2076: unless ($fperror) {
2077: my $result=&make_passwd_file($uname,$udom,$umode,$npass, $passfilename);
2078: &Reply($client,\$result, $userinput); #BUGBUG - could be fail
2079: } else {
2080: &Failure($client, \$fperror, $userinput);
2081: }
2082: }
2083: umask($oldumask);
2084: } else {
2085: &Failure($client, "not_right_domain\n",
2086: $userinput); # Even if we are multihomed.
2087:
2088: }
2089: return 1;
2090:
2091: }
2092: ®ister_handler("makeuser", \&add_user_handler, 1, 1, 0);
2093:
2094: #
2095: # Change the authentication method of a user. Note that this may
2096: # also implicitly change the user's password if, for example, the user is
2097: # joining an existing authentication realm. Known authentication realms at
2098: # this time are:
2099: # internal - Purely internal password file (only loncapa knows this user)
2100: # local - Institutionally written authentication module.
2101: # unix - Unix user (/etc/passwd with or without /etc/shadow).
2102: # kerb4 - kerberos version 4
2103: # kerb5 - kerberos version 5
2104: #
2105: # Parameters:
2106: # $cmd - The command that got us here.
2107: # $tail - Tail of the command (remaining parameters).
2108: # $client - File descriptor connected to client.
2109: # Returns
2110: # 0 - Requested to exit, caller should shut down.
2111: # 1 - Continue processing.
2112: # Implicit inputs:
2113: # The authentication systems describe above have their own forms of implicit
2114: # input into the authentication process that are described above.
2115: # NOTE:
2116: # This is also used to change the authentication credential values (e.g. passwd).
2117: #
2118: #
2119: sub change_authentication_handler {
2120:
2121: my ($cmd, $tail, $client) = @_;
2122:
2123: my $userinput = "$cmd:$tail"; # Reconstruct user input.
2124:
2125: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
2126: &Debug("cmd = ".$cmd." domain= ".$udom."uname =".$uname." umode= ".$umode);
2127: if ($udom ne $currentdomainid) {
2128: &Failure( $client, "not_right_domain\n", $client);
2129: } else {
2130:
2131: chomp($npass);
2132:
2133: $npass=&unescape($npass);
2134: my $oldauth = &get_auth_type($udom, $uname); # Get old auth info.
2135: my $passfilename = &password_path($udom, $uname);
2136: if ($passfilename) { # Not allowed to create a new user!!
2137: # If just changing the unix passwd. need to arrange to run
2138: # passwd since otherwise make_passwd_file will run
2139: # lcuseradd which fails if an account already exists
2140: # (to prevent an unscrupulous LONCAPA admin from stealing
2141: # an existing account by overwriting it as a LonCAPA account).
2142:
2143: if(($oldauth =~/^unix/) && ($umode eq "unix")) {
2144: my $result = &change_unix_password($uname, $npass);
2145: &logthis("Result of password change for $uname: ".$result);
2146: if ($result eq "ok") {
2147: &Reply($client, \$result);
2148: } else {
2149: &Failure($client, \$result);
2150: }
2151: } else {
2152: my $result=&make_passwd_file($uname,$udom,$umode,$npass,$passfilename);
2153: #
2154: # If the current auth mode is internal, and the old auth mode was
2155: # unix, or krb*, and the user is an author for this domain,
2156: # re-run manage_permissions for that role in order to be able
2157: # to take ownership of the construction space back to www:www
2158: #
2159:
2160:
2161: if( (($oldauth =~ /^unix/) && ($umode eq "internal")) ||
2162: (($oldauth =~ /^internal/) && ($umode eq "unix")) ) {
2163: if(&is_author($udom, $uname)) {
2164: &Debug(" Need to manage author permissions...");
2165: &manage_permissions("/$udom/_au", $udom, $uname, "$umode:");
2166: }
2167: }
2168: &Reply($client, \$result, $userinput);
2169: }
2170:
2171:
2172: } else {
2173: &Failure($client, "non_authorized\n", $userinput); # Fail the user now.
2174: }
2175: }
2176: return 1;
2177: }
2178: ®ister_handler("changeuserauth", \&change_authentication_handler, 1,1, 0);
2179:
2180: #
2181: # Determines if this is the home server for a user. The home server
2182: # for a user will have his/her lon-capa passwd file. Therefore all we need
2183: # to do is determine if this file exists.
2184: #
2185: # Parameters:
2186: # $cmd - The command that got us here.
2187: # $tail - Tail of the command (remaining parameters).
2188: # $client - File descriptor connected to client.
2189: # Returns
2190: # 0 - Requested to exit, caller should shut down.
2191: # 1 - Continue processing.
2192: # Implicit inputs:
2193: # The authentication systems describe above have their own forms of implicit
2194: # input into the authentication process that are described above.
2195: #
2196: sub is_home_handler {
2197: my ($cmd, $tail, $client) = @_;
2198:
2199: my $userinput = "$cmd:$tail";
2200:
2201: my ($udom,$uname)=split(/:/,$tail);
2202: chomp($uname);
2203: my $passfile = &password_filename($udom, $uname);
2204: if($passfile) {
2205: &Reply( $client, "found\n", $userinput);
2206: } else {
2207: &Failure($client, "not_found\n", $userinput);
2208: }
2209: return 1;
2210: }
2211: ®ister_handler("home", \&is_home_handler, 0,1,0);
2212:
2213: #
2214: # Process an update request for a resource.
2215: # A resource has been modified that we hold a subscription to.
2216: # If the resource is not local, then we must update, or at least invalidate our
2217: # cached copy of the resource.
2218: # Parameters:
2219: # $cmd - The command that got us here.
2220: # $tail - Tail of the command (remaining parameters).
2221: # $client - File descriptor connected to client.
2222: # Returns
2223: # 0 - Requested to exit, caller should shut down.
2224: # 1 - Continue processing.
2225: # Implicit inputs:
2226: # The authentication systems describe above have their own forms of implicit
2227: # input into the authentication process that are described above.
2228: #
2229: sub update_resource_handler {
2230:
2231: my ($cmd, $tail, $client) = @_;
2232:
2233: my $userinput = "$cmd:$tail";
2234:
2235: my $fname= $tail; # This allows interactive testing
2236:
2237:
2238: my $ownership=ishome($fname);
2239: if ($ownership eq 'not_owner') {
2240: if (-e $fname) {
2241: # Delete preview file, if exists
2242: unlink("$fname.tmp");
2243: # Get usage stats
2244: my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
2245: $atime,$mtime,$ctime,$blksize,$blocks)=stat($fname);
2246: my $now=time;
2247: my $since=$now-$atime;
2248: # If the file has not been used within lonExpire seconds,
2249: # unsubscribe from it and delete local copy
2250: if ($since>$perlvar{'lonExpire'}) {
2251: my $reply=&Apache::lonnet::reply("unsub:$fname","$clientname");
2252: &devalidate_meta_cache($fname);
2253: unlink("$fname");
2254: unlink("$fname.meta");
2255: } else {
2256: # Yes, this is in active use. Get a fresh copy. Since it might be in
2257: # very active use and huge (like a movie), copy it to "in.transfer" filename first.
2258: my $transname="$fname.in.transfer";
2259: my $remoteurl=&Apache::lonnet::reply("sub:$fname","$clientname");
2260: my $response;
2261: # FIXME: cannot replicate files that take more than two minutes to transfer?
2262: # alarm(120);
2263: # FIXME: this should use the LWP mechanism, not internal alarms.
2264: alarm(1200);
2265: {
2266: my $ua=new LWP::UserAgent;
2267: my $request=new HTTP::Request('GET',"$remoteurl");
2268: $response=$ua->request($request,$transname);
2269: }
2270: alarm(0);
2271: if ($response->is_error()) {
2272: # FIXME: we should probably clean up here instead of just whine
2273: unlink($transname);
2274: my $message=$response->status_line;
2275: &logthis("LWP GET: $message for $fname ($remoteurl)");
2276: } else {
2277: if ($remoteurl!~/\.meta$/) {
2278: # FIXME: isn't there an internal LWP mechanism for this?
2279: alarm(120);
2280: {
2281: my $ua=new LWP::UserAgent;
2282: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
2283: my $mresponse=$ua->request($mrequest,$fname.'.meta');
2284: if ($mresponse->is_error()) {
2285: unlink($fname.'.meta');
2286: }
2287: }
2288: alarm(0);
2289: }
2290: # we successfully transfered, copy file over to real name
2291: rename($transname,$fname);
2292: &devalidate_meta_cache($fname);
2293: }
2294: }
2295: &Reply( $client, "ok\n", $userinput);
2296: } else {
2297: &Failure($client, "not_found\n", $userinput);
2298: }
2299: } else {
2300: &Failure($client, "rejected\n", $userinput);
2301: }
2302: return 1;
2303: }
2304: ®ister_handler("update", \&update_resource_handler, 0 ,1, 0);
2305:
2306: sub devalidate_meta_cache {
2307: my ($url) = @_;
2308: use Cache::Memcached;
2309: my $memcache = new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
2310: $url = &Apache::lonnet::declutter($url);
2311: $url =~ s-\.meta$--;
2312: my $id = &escape('meta:'.$url);
2313: $memcache->delete($id);
2314: }
2315:
2316: #
2317: # Fetch a user file from a remote server to the user's home directory
2318: # userfiles subdir.
2319: # Parameters:
2320: # $cmd - The command that got us here.
2321: # $tail - Tail of the command (remaining parameters).
2322: # $client - File descriptor connected to client.
2323: # Returns
2324: # 0 - Requested to exit, caller should shut down.
2325: # 1 - Continue processing.
2326: #
2327: sub fetch_user_file_handler {
2328:
2329: my ($cmd, $tail, $client) = @_;
2330:
2331: my $userinput = "$cmd:$tail";
2332: my $fname = $tail;
2333: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
2334: my $udir=&propath($udom,$uname).'/userfiles';
2335: unless (-e $udir) {
2336: mkdir($udir,0770);
2337: }
2338: Debug("fetch user file for $fname");
2339: if (-e $udir) {
2340: $ufile=~s/^[\.\~]+//;
2341:
2342: # IF necessary, create the path right down to the file.
2343: # Note that any regular files in the way of this path are
2344: # wiped out to deal with some earlier folly of mine.
2345:
2346: if (!&mkpath($udir.'/'.$ufile)) {
2347: &Failure($client, "unable_to_create\n", $userinput);
2348: }
2349:
2350: my $destname=$udir.'/'.$ufile;
2351: my $transname=$udir.'/'.$ufile.'.in.transit';
2352: my $clientprotocol=$Apache::lonnet::protocol{$clientname};
2353: $clientprotocol = 'http' if ($clientprotocol ne 'https');
2354: my $clienthost = &Apache::lonnet::hostname($clientname);
2355: my $remoteurl=$clientprotocol.'://'.$clienthost.'/userfiles/'.$fname;
2356: my $response;
2357: Debug("Remote URL : $remoteurl Transfername $transname Destname: $destname");
2358: alarm(120);
2359: {
2360: my $ua=new LWP::UserAgent;
2361: my $request=new HTTP::Request('GET',"$remoteurl");
2362: $response=$ua->request($request,$transname);
2363: }
2364: alarm(0);
2365: if ($response->is_error()) {
2366: unlink($transname);
2367: my $message=$response->status_line;
2368: &logthis("LWP GET: $message for $fname ($remoteurl)");
2369: &Failure($client, "failed\n", $userinput);
2370: } else {
2371: Debug("Renaming $transname to $destname");
2372: if (!rename($transname,$destname)) {
2373: &logthis("Unable to move $transname to $destname");
2374: unlink($transname);
2375: &Failure($client, "failed\n", $userinput);
2376: } else {
2377: if ($fname =~ /^default.+\.(page|sequence)$/) {
2378: my ($major,$minor) = split(/\./,$clientversion);
2379: if (($major < 2) || ($major == 2 && $minor < 11)) {
2380: my $now = time;
2381: &Apache::lonnet::do_cache_new('crschange',$udom.'_'.$uname,$now,600);
2382: my $key = &escape('internal.contentchange');
2383: my $what = "$key=$now";
2384: my $hashref = &tie_user_hash($udom,$uname,'environment',
2385: &GDBM_WRCREAT(),"P",$what);
2386: if ($hashref) {
2387: $hashref->{$key}=$now;
2388: if (!&untie_user_hash($hashref)) {
2389: &logthis("error: ".($!+0)." untie (GDBM) failed ".
2390: "when updating internal.contentchange");
2391: }
2392: }
2393: }
2394: }
2395: &Reply($client, "ok\n", $userinput);
2396: }
2397: }
2398: } else {
2399: &Failure($client, "not_home\n", $userinput);
2400: }
2401: return 1;
2402: }
2403: ®ister_handler("fetchuserfile", \&fetch_user_file_handler, 0, 1, 0);
2404:
2405: #
2406: # Remove a file from a user's home directory userfiles subdirectory.
2407: # Parameters:
2408: # cmd - the Lond request keyword that got us here.
2409: # tail - the part of the command past the keyword.
2410: # client- File descriptor connected with the client.
2411: #
2412: # Returns:
2413: # 1 - Continue processing.
2414: sub remove_user_file_handler {
2415: my ($cmd, $tail, $client) = @_;
2416:
2417: my ($fname) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2418:
2419: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
2420: if ($ufile =~m|/\.\./|) {
2421: # any files paths with /../ in them refuse
2422: # to deal with
2423: &Failure($client, "refused\n", "$cmd:$tail");
2424: } else {
2425: my $udir = &propath($udom,$uname);
2426: if (-e $udir) {
2427: my $file=$udir.'/userfiles/'.$ufile;
2428: if (-e $file) {
2429: #
2430: # If the file is a regular file unlink is fine...
2431: # However it's possible the client wants a dir.
2432: # removed, in which case rmdir is more approprate:
2433: #
2434: if (-f $file){
2435: unlink($file);
2436: } elsif(-d $file) {
2437: rmdir($file);
2438: }
2439: if (-e $file) {
2440: # File is still there after we deleted it ?!?
2441:
2442: &Failure($client, "failed\n", "$cmd:$tail");
2443: } else {
2444: &Reply($client, "ok\n", "$cmd:$tail");
2445: }
2446: } else {
2447: &Failure($client, "not_found\n", "$cmd:$tail");
2448: }
2449: } else {
2450: &Failure($client, "not_home\n", "$cmd:$tail");
2451: }
2452: }
2453: return 1;
2454: }
2455: ®ister_handler("removeuserfile", \&remove_user_file_handler, 0,1,0);
2456:
2457: #
2458: # make a directory in a user's home directory userfiles subdirectory.
2459: # Parameters:
2460: # cmd - the Lond request keyword that got us here.
2461: # tail - the part of the command past the keyword.
2462: # client- File descriptor connected with the client.
2463: #
2464: # Returns:
2465: # 1 - Continue processing.
2466: sub mkdir_user_file_handler {
2467: my ($cmd, $tail, $client) = @_;
2468:
2469: my ($dir) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2470: $dir=&unescape($dir);
2471: my ($udom,$uname,$ufile) = ($dir =~ m|^([^/]+)/([^/]+)/(.+)$|);
2472: if ($ufile =~m|/\.\./|) {
2473: # any files paths with /../ in them refuse
2474: # to deal with
2475: &Failure($client, "refused\n", "$cmd:$tail");
2476: } else {
2477: my $udir = &propath($udom,$uname);
2478: if (-e $udir) {
2479: my $newdir=$udir.'/userfiles/'.$ufile.'/';
2480: if (!&mkpath($newdir)) {
2481: &Failure($client, "failed\n", "$cmd:$tail");
2482: }
2483: &Reply($client, "ok\n", "$cmd:$tail");
2484: } else {
2485: &Failure($client, "not_home\n", "$cmd:$tail");
2486: }
2487: }
2488: return 1;
2489: }
2490: ®ister_handler("mkdiruserfile", \&mkdir_user_file_handler, 0,1,0);
2491:
2492: #
2493: # rename a file in a user's home directory userfiles subdirectory.
2494: # Parameters:
2495: # cmd - the Lond request keyword that got us here.
2496: # tail - the part of the command past the keyword.
2497: # client- File descriptor connected with the client.
2498: #
2499: # Returns:
2500: # 1 - Continue processing.
2501: sub rename_user_file_handler {
2502: my ($cmd, $tail, $client) = @_;
2503:
2504: my ($udom,$uname,$old,$new) = split(/:/, $tail);
2505: $old=&unescape($old);
2506: $new=&unescape($new);
2507: if ($new =~m|/\.\./| || $old =~m|/\.\./|) {
2508: # any files paths with /../ in them refuse to deal with
2509: &Failure($client, "refused\n", "$cmd:$tail");
2510: } else {
2511: my $udir = &propath($udom,$uname);
2512: if (-e $udir) {
2513: my $oldfile=$udir.'/userfiles/'.$old;
2514: my $newfile=$udir.'/userfiles/'.$new;
2515: if (-e $newfile) {
2516: &Failure($client, "exists\n", "$cmd:$tail");
2517: } elsif (! -e $oldfile) {
2518: &Failure($client, "not_found\n", "$cmd:$tail");
2519: } else {
2520: if (!rename($oldfile,$newfile)) {
2521: &Failure($client, "failed\n", "$cmd:$tail");
2522: } else {
2523: &Reply($client, "ok\n", "$cmd:$tail");
2524: }
2525: }
2526: } else {
2527: &Failure($client, "not_home\n", "$cmd:$tail");
2528: }
2529: }
2530: return 1;
2531: }
2532: ®ister_handler("renameuserfile", \&rename_user_file_handler, 0,1,0);
2533:
2534: #
2535: # Checks if the specified user has an active session on the server
2536: # return ok if so, not_found if not
2537: #
2538: # Parameters:
2539: # cmd - The request keyword that dispatched to tus.
2540: # tail - The tail of the request (colon separated parameters).
2541: # client - Filehandle open on the client.
2542: # Return:
2543: # 1.
2544: sub user_has_session_handler {
2545: my ($cmd, $tail, $client) = @_;
2546:
2547: my ($udom, $uname) = map { &unescape($_) } (split(/:/, $tail));
2548:
2549: opendir(DIR,$perlvar{'lonIDsDir'});
2550: my $filename;
2551: while ($filename=readdir(DIR)) {
2552: last if ($filename=~/^\Q$uname\E_\d+_\Q$udom\E_/);
2553: }
2554: if ($filename) {
2555: &Reply($client, "ok\n", "$cmd:$tail");
2556: } else {
2557: &Failure($client, "not_found\n", "$cmd:$tail");
2558: }
2559: return 1;
2560:
2561: }
2562: ®ister_handler("userhassession", \&user_has_session_handler, 0,1,0);
2563:
2564: #
2565: # Authenticate access to a user file by checking that the token the user's
2566: # passed also exists in their session file
2567: #
2568: # Parameters:
2569: # cmd - The request keyword that dispatched to tus.
2570: # tail - The tail of the request (colon separated parameters).
2571: # client - Filehandle open on the client.
2572: # Return:
2573: # 1.
2574: sub token_auth_user_file_handler {
2575: my ($cmd, $tail, $client) = @_;
2576:
2577: my ($fname, $session) = split(/:/, $tail);
2578:
2579: chomp($session);
2580: my $reply="non_auth";
2581: my $file = $perlvar{'lonIDsDir'}.'/'.$session.'.id';
2582: if (open(ENVIN,"$file")) {
2583: flock(ENVIN,LOCK_SH);
2584: tie(my %disk_env,'GDBM_File',"$file",&GDBM_READER(),0640);
2585: if (exists($disk_env{"userfile.$fname"})) {
2586: $reply="ok";
2587: } else {
2588: foreach my $envname (keys(%disk_env)) {
2589: if ($envname=~ m|^userfile\.\Q$fname\E|) {
2590: $reply="ok";
2591: last;
2592: }
2593: }
2594: }
2595: untie(%disk_env);
2596: close(ENVIN);
2597: &Reply($client, \$reply, "$cmd:$tail");
2598: } else {
2599: &Failure($client, "invalid_token\n", "$cmd:$tail");
2600: }
2601: return 1;
2602:
2603: }
2604: ®ister_handler("tokenauthuserfile", \&token_auth_user_file_handler, 0,1,0);
2605:
2606: #
2607: # Unsubscribe from a resource.
2608: #
2609: # Parameters:
2610: # $cmd - The command that got us here.
2611: # $tail - Tail of the command (remaining parameters).
2612: # $client - File descriptor connected to client.
2613: # Returns
2614: # 0 - Requested to exit, caller should shut down.
2615: # 1 - Continue processing.
2616: #
2617: sub unsubscribe_handler {
2618: my ($cmd, $tail, $client) = @_;
2619:
2620: my $userinput= "$cmd:$tail";
2621:
2622: my ($fname) = split(/:/,$tail); # Split in case there's extrs.
2623:
2624: &Debug("Unsubscribing $fname");
2625: if (-e $fname) {
2626: &Debug("Exists");
2627: &Reply($client, &unsub($fname,$clientip), $userinput);
2628: } else {
2629: &Failure($client, "not_found\n", $userinput);
2630: }
2631: return 1;
2632: }
2633: ®ister_handler("unsub", \&unsubscribe_handler, 0, 1, 0);
2634:
2635: # Subscribe to a resource
2636: #
2637: # Parameters:
2638: # $cmd - The command that got us here.
2639: # $tail - Tail of the command (remaining parameters).
2640: # $client - File descriptor connected to client.
2641: # Returns
2642: # 0 - Requested to exit, caller should shut down.
2643: # 1 - Continue processing.
2644: #
2645: sub subscribe_handler {
2646: my ($cmd, $tail, $client)= @_;
2647:
2648: my $userinput = "$cmd:$tail";
2649:
2650: &Reply( $client, &subscribe($userinput,$clientip), $userinput);
2651:
2652: return 1;
2653: }
2654: ®ister_handler("sub", \&subscribe_handler, 0, 1, 0);
2655:
2656: #
2657: # Determine the latest version of a resource (it looks for the highest
2658: # past version and then returns that +1)
2659: #
2660: # Parameters:
2661: # $cmd - The command that got us here.
2662: # $tail - Tail of the command (remaining parameters).
2663: # (Should consist of an absolute path to a file)
2664: # $client - File descriptor connected to client.
2665: # Returns
2666: # 0 - Requested to exit, caller should shut down.
2667: # 1 - Continue processing.
2668: #
2669: sub current_version_handler {
2670: my ($cmd, $tail, $client) = @_;
2671:
2672: my $userinput= "$cmd:$tail";
2673:
2674: my $fname = $tail;
2675: &Reply( $client, ¤tversion($fname)."\n", $userinput);
2676: return 1;
2677:
2678: }
2679: ®ister_handler("currentversion", \¤t_version_handler, 0, 1, 0);
2680:
2681: # Make an entry in a user's activity log.
2682: #
2683: # Parameters:
2684: # $cmd - The command that got us here.
2685: # $tail - Tail of the command (remaining parameters).
2686: # $client - File descriptor connected to client.
2687: # Returns
2688: # 0 - Requested to exit, caller should shut down.
2689: # 1 - Continue processing.
2690: #
2691: sub activity_log_handler {
2692: my ($cmd, $tail, $client) = @_;
2693:
2694:
2695: my $userinput= "$cmd:$tail";
2696:
2697: my ($udom,$uname,$what)=split(/:/,$tail);
2698: chomp($what);
2699: my $proname=&propath($udom,$uname);
2700: my $now=time;
2701: my $hfh;
2702: if ($hfh=IO::File->new(">>$proname/activity.log")) {
2703: print $hfh "$now:$clientname:$what\n";
2704: &Reply( $client, "ok\n", $userinput);
2705: } else {
2706: &Failure($client, "error: ".($!+0)." IO::File->new Failed "
2707: ."while attempting log\n",
2708: $userinput);
2709: }
2710:
2711: return 1;
2712: }
2713: ®ister_handler("log", \&activity_log_handler, 0, 1, 0);
2714:
2715: #
2716: # Put a namespace entry in a user profile hash.
2717: # My druthers would be for this to be an encrypted interaction too.
2718: # anything that might be an inadvertent covert channel about either
2719: # user authentication or user personal information....
2720: #
2721: # Parameters:
2722: # $cmd - The command that got us here.
2723: # $tail - Tail of the command (remaining parameters).
2724: # $client - File descriptor connected to client.
2725: # Returns
2726: # 0 - Requested to exit, caller should shut down.
2727: # 1 - Continue processing.
2728: #
2729: sub put_user_profile_entry {
2730: my ($cmd, $tail, $client) = @_;
2731:
2732: my $userinput = "$cmd:$tail";
2733:
2734: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
2735: if ($namespace ne 'roles') {
2736: chomp($what);
2737: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2738: &GDBM_WRCREAT(),"P",$what);
2739: if($hashref) {
2740: my @pairs=split(/\&/,$what);
2741: foreach my $pair (@pairs) {
2742: my ($key,$value)=split(/=/,$pair);
2743: $hashref->{$key}=$value;
2744: }
2745: if (&untie_user_hash($hashref)) {
2746: &Reply( $client, "ok\n", $userinput);
2747: } else {
2748: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2749: "while attempting put\n",
2750: $userinput);
2751: }
2752: } else {
2753: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2754: "while attempting put\n", $userinput);
2755: }
2756: } else {
2757: &Failure( $client, "refused\n", $userinput);
2758: }
2759:
2760: return 1;
2761: }
2762: ®ister_handler("put", \&put_user_profile_entry, 0, 1, 0);
2763:
2764: # Put a piece of new data in hash, returns error if entry already exists
2765: # Parameters:
2766: # $cmd - The command that got us here.
2767: # $tail - Tail of the command (remaining parameters).
2768: # $client - File descriptor connected to client.
2769: # Returns
2770: # 0 - Requested to exit, caller should shut down.
2771: # 1 - Continue processing.
2772: #
2773: sub newput_user_profile_entry {
2774: my ($cmd, $tail, $client) = @_;
2775:
2776: my $userinput = "$cmd:$tail";
2777:
2778: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
2779: if ($namespace eq 'roles') {
2780: &Failure( $client, "refused\n", $userinput);
2781: return 1;
2782: }
2783:
2784: chomp($what);
2785:
2786: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2787: &GDBM_WRCREAT(),"N",$what);
2788: if(!$hashref) {
2789: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2790: "while attempting put\n", $userinput);
2791: return 1;
2792: }
2793:
2794: my @pairs=split(/\&/,$what);
2795: foreach my $pair (@pairs) {
2796: my ($key,$value)=split(/=/,$pair);
2797: if (exists($hashref->{$key})) {
2798: &Failure($client, "key_exists: ".$key."\n",$userinput);
2799: return 1;
2800: }
2801: }
2802:
2803: foreach my $pair (@pairs) {
2804: my ($key,$value)=split(/=/,$pair);
2805: $hashref->{$key}=$value;
2806: }
2807:
2808: if (&untie_user_hash($hashref)) {
2809: &Reply( $client, "ok\n", $userinput);
2810: } else {
2811: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2812: "while attempting put\n",
2813: $userinput);
2814: }
2815: return 1;
2816: }
2817: ®ister_handler("newput", \&newput_user_profile_entry, 0, 1, 0);
2818:
2819: #
2820: # Increment a profile entry in the user history file.
2821: # The history contains keyword value pairs. In this case,
2822: # The value itself is a pair of numbers. The first, the current value
2823: # the second an increment that this function applies to the current
2824: # value.
2825: #
2826: # Parameters:
2827: # $cmd - The command that got us here.
2828: # $tail - Tail of the command (remaining parameters).
2829: # $client - File descriptor connected to client.
2830: # Returns
2831: # 0 - Requested to exit, caller should shut down.
2832: # 1 - Continue processing.
2833: #
2834: sub increment_user_value_handler {
2835: my ($cmd, $tail, $client) = @_;
2836:
2837: my $userinput = "$cmd:$tail";
2838:
2839: my ($udom,$uname,$namespace,$what) =split(/:/,$tail);
2840: if ($namespace ne 'roles') {
2841: chomp($what);
2842: my $hashref = &tie_user_hash($udom, $uname,
2843: $namespace, &GDBM_WRCREAT(),
2844: "P",$what);
2845: if ($hashref) {
2846: my @pairs=split(/\&/,$what);
2847: foreach my $pair (@pairs) {
2848: my ($key,$value)=split(/=/,$pair);
2849: $value = &unescape($value);
2850: # We could check that we have a number...
2851: if (! defined($value) || $value eq '') {
2852: $value = 1;
2853: }
2854: $hashref->{$key}+=$value;
2855: if ($namespace eq 'nohist_resourcetracker') {
2856: if ($hashref->{$key} < 0) {
2857: $hashref->{$key} = 0;
2858: }
2859: }
2860: }
2861: if (&untie_user_hash($hashref)) {
2862: &Reply( $client, "ok\n", $userinput);
2863: } else {
2864: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2865: "while attempting inc\n", $userinput);
2866: }
2867: } else {
2868: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2869: "while attempting inc\n", $userinput);
2870: }
2871: } else {
2872: &Failure($client, "refused\n", $userinput);
2873: }
2874:
2875: return 1;
2876: }
2877: ®ister_handler("inc", \&increment_user_value_handler, 0, 1, 0);
2878:
2879: #
2880: # Put a new role for a user. Roles are LonCAPA's packaging of permissions.
2881: # Each 'role' a user has implies a set of permissions. Adding a new role
2882: # for a person grants the permissions packaged with that role
2883: # to that user when the role is selected.
2884: #
2885: # Parameters:
2886: # $cmd - The command string (rolesput).
2887: # $tail - The remainder of the request line. For rolesput this
2888: # consists of a colon separated list that contains:
2889: # The domain and user that is granting the role (logged).
2890: # The domain and user that is getting the role.
2891: # The roles being granted as a set of & separated pairs.
2892: # each pair a key value pair.
2893: # $client - File descriptor connected to the client.
2894: # Returns:
2895: # 0 - If the daemon should exit
2896: # 1 - To continue processing.
2897: #
2898: #
2899: sub roles_put_handler {
2900: my ($cmd, $tail, $client) = @_;
2901:
2902: my $userinput = "$cmd:$tail";
2903:
2904: my ( $exedom, $exeuser, $udom, $uname, $what) = split(/:/,$tail);
2905:
2906:
2907: my $namespace='roles';
2908: chomp($what);
2909: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2910: &GDBM_WRCREAT(), "P",
2911: "$exedom:$exeuser:$what");
2912: #
2913: # Log the attempt to set a role. The {}'s here ensure that the file
2914: # handle is open for the minimal amount of time. Since the flush
2915: # is done on close this improves the chances the log will be an un-
2916: # corrupted ordered thing.
2917: if ($hashref) {
2918: my $pass_entry = &get_auth_type($udom, $uname);
2919: my ($auth_type,$pwd) = split(/:/, $pass_entry);
2920: $auth_type = $auth_type.":";
2921: my @pairs=split(/\&/,$what);
2922: foreach my $pair (@pairs) {
2923: my ($key,$value)=split(/=/,$pair);
2924: &manage_permissions($key, $udom, $uname,
2925: $auth_type);
2926: $hashref->{$key}=$value;
2927: }
2928: if (&untie_user_hash($hashref)) {
2929: &Reply($client, "ok\n", $userinput);
2930: } else {
2931: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2932: "while attempting rolesput\n", $userinput);
2933: }
2934: } else {
2935: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2936: "while attempting rolesput\n", $userinput);
2937: }
2938: return 1;
2939: }
2940: ®ister_handler("rolesput", \&roles_put_handler, 1,1,0); # Encoded client only.
2941:
2942: #
2943: # Deletes (removes) a role for a user. This is equivalent to removing
2944: # a permissions package associated with the role from the user's profile.
2945: #
2946: # Parameters:
2947: # $cmd - The command (rolesdel)
2948: # $tail - The remainder of the request line. This consists
2949: # of:
2950: # The domain and user requesting the change (logged)
2951: # The domain and user being changed.
2952: # The roles being revoked. These are shipped to us
2953: # as a bunch of & separated role name keywords.
2954: # $client - The file handle open on the client.
2955: # Returns:
2956: # 1 - Continue processing
2957: # 0 - Exit.
2958: #
2959: sub roles_delete_handler {
2960: my ($cmd, $tail, $client) = @_;
2961:
2962: my $userinput = "$cmd:$tail";
2963:
2964: my ($exedom,$exeuser,$udom,$uname,$what)=split(/:/,$tail);
2965: &Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom.
2966: "what = ".$what);
2967: my $namespace='roles';
2968: chomp($what);
2969: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2970: &GDBM_WRCREAT(), "D",
2971: "$exedom:$exeuser:$what");
2972:
2973: if ($hashref) {
2974: my @rolekeys=split(/\&/,$what);
2975:
2976: foreach my $key (@rolekeys) {
2977: delete $hashref->{$key};
2978: }
2979: if (&untie_user_hash($hashref)) {
2980: &Reply($client, "ok\n", $userinput);
2981: } else {
2982: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2983: "while attempting rolesdel\n", $userinput);
2984: }
2985: } else {
2986: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2987: "while attempting rolesdel\n", $userinput);
2988: }
2989:
2990: return 1;
2991: }
2992: ®ister_handler("rolesdel", \&roles_delete_handler, 1,1, 0); # Encoded client only
2993:
2994: # Unencrypted get from a user's profile database. See
2995: # GetProfileEntryEncrypted for a version that does end-to-end encryption.
2996: # This function retrieves a keyed item from a specific named database in the
2997: # user's directory.
2998: #
2999: # Parameters:
3000: # $cmd - Command request keyword (get).
3001: # $tail - Tail of the command. This is a colon separated list
3002: # consisting of the domain and username that uniquely
3003: # identifies the profile,
3004: # The 'namespace' which selects the gdbm file to
3005: # do the lookup in,
3006: # & separated list of keys to lookup. Note that
3007: # the values are returned as an & separated list too.
3008: # $client - File descriptor open on the client.
3009: # Returns:
3010: # 1 - Continue processing.
3011: # 0 - Exit.
3012: #
3013: sub get_profile_entry {
3014: my ($cmd, $tail, $client) = @_;
3015:
3016: my $userinput= "$cmd:$tail";
3017:
3018: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
3019: chomp($what);
3020:
3021:
3022: my $replystring = read_profile($udom, $uname, $namespace, $what);
3023: my ($first) = split(/:/,$replystring);
3024: if($first ne "error") {
3025: &Reply($client, \$replystring, $userinput);
3026: } else {
3027: &Failure($client, $replystring." while attempting get\n", $userinput);
3028: }
3029: return 1;
3030:
3031:
3032: }
3033: ®ister_handler("get", \&get_profile_entry, 0,1,0);
3034:
3035: #
3036: # Process the encrypted get request. Note that the request is sent
3037: # in clear, but the reply is encrypted. This is a small covert channel:
3038: # information about the sensitive keys is given to the snooper. Just not
3039: # information about the values of the sensitive key. Hmm if I wanted to
3040: # know these I'd snoop for the egets. Get the profile item names from them
3041: # and then issue a get for them since there's no enforcement of the
3042: # requirement of an encrypted get for particular profile items. If I
3043: # were re-doing this, I'd force the request to be encrypted as well as the
3044: # reply. I'd also just enforce encrypted transactions for all gets since
3045: # that would prevent any covert channel snooping.
3046: #
3047: # Parameters:
3048: # $cmd - Command keyword of request (eget).
3049: # $tail - Tail of the command. See GetProfileEntry
# for more information about this.
3050: # $client - File open on the client.
3051: # Returns:
3052: # 1 - Continue processing
3053: # 0 - server should exit.
3054: sub get_profile_entry_encrypted {
3055: my ($cmd, $tail, $client) = @_;
3056:
3057: my $userinput = "$cmd:$tail";
3058:
3059: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
3060: chomp($what);
3061: my $qresult = read_profile($udom, $uname, $namespace, $what);
3062: my ($first) = split(/:/, $qresult);
3063: if($first ne "error") {
3064:
3065: if ($cipher) {
3066: my $cmdlength=length($qresult);
3067: $qresult.=" ";
3068: my $encqresult='';
3069: for(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
3070: $encqresult.= unpack("H16",
3071: $cipher->encrypt(substr($qresult,
3072: $encidx,
3073: 8)));
3074: }
3075: &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput);
3076: } else {
3077: &Failure( $client, "error:no_key\n", $userinput);
3078: }
3079: } else {
3080: &Failure($client, "$qresult while attempting eget\n", $userinput);
3081:
3082: }
3083:
3084: return 1;
3085: }
3086: ®ister_handler("eget", \&get_profile_entry_encrypted, 0, 1, 0);
3087:
3088: #
3089: # Deletes a key in a user profile database.
3090: #
3091: # Parameters:
3092: # $cmd - Command keyword (del).
3093: # $tail - Command tail. IN this case a colon
3094: # separated list containing:
3095: # The domain and user that identifies uniquely
3096: # the identity of the user.
3097: # The profile namespace (name of the profile
3098: # database file).
3099: # & separated list of keywords to delete.
3100: # $client - File open on client socket.
3101: # Returns:
3102: # 1 - Continue processing
3103: # 0 - Exit server.
3104: #
3105: #
3106: sub delete_profile_entry {
3107: my ($cmd, $tail, $client) = @_;
3108:
3109: my $userinput = "cmd:$tail";
3110:
3111: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
3112: chomp($what);
3113: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3114: &GDBM_WRCREAT(),
3115: "D",$what);
3116: if ($hashref) {
3117: my @keys=split(/\&/,$what);
3118: foreach my $key (@keys) {
3119: delete($hashref->{$key});
3120: }
3121: if (&untie_user_hash($hashref)) {
3122: &Reply($client, "ok\n", $userinput);
3123: } else {
3124: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3125: "while attempting del\n", $userinput);
3126: }
3127: } else {
3128: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3129: "while attempting del\n", $userinput);
3130: }
3131: return 1;
3132: }
3133: ®ister_handler("del", \&delete_profile_entry, 0, 1, 0);
3134:
3135: #
3136: # List the set of keys that are defined in a profile database file.
3137: # A successful reply from this will contain an & separated list of
3138: # the keys.
3139: # Parameters:
3140: # $cmd - Command request (keys).
3141: # $tail - Remainder of the request, a colon separated
3142: # list containing domain/user that identifies the
3143: # user being queried, and the database namespace
3144: # (database filename essentially).
3145: # $client - File open on the client.
3146: # Returns:
3147: # 1 - Continue processing.
3148: # 0 - Exit the server.
3149: #
3150: sub get_profile_keys {
3151: my ($cmd, $tail, $client) = @_;
3152:
3153: my $userinput = "$cmd:$tail";
3154:
3155: my ($udom,$uname,$namespace)=split(/:/,$tail);
3156: my $qresult='';
3157: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3158: &GDBM_READER());
3159: if ($hashref) {
3160: foreach my $key (keys %$hashref) {
3161: $qresult.="$key&";
3162: }
3163: if (&untie_user_hash($hashref)) {
3164: $qresult=~s/\&$//;
3165: &Reply($client, \$qresult, $userinput);
3166: } else {
3167: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3168: "while attempting keys\n", $userinput);
3169: }
3170: } else {
3171: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3172: "while attempting keys\n", $userinput);
3173: }
3174:
3175: return 1;
3176: }
3177: ®ister_handler("keys", \&get_profile_keys, 0, 1, 0);
3178:
3179: #
3180: # Dump the contents of a user profile database.
3181: # Note that this constitutes a very large covert channel too since
3182: # the dump will return sensitive information that is not encrypted.
3183: # The naive security assumption is that the session negotiation ensures
3184: # our client is trusted and I don't believe that's assured at present.
3185: # Sure want badly to go to ssl or tls. Of course if my peer isn't really
3186: # a LonCAPA node they could have negotiated an encryption key too so >sigh<.
3187: #
3188: # Parameters:
3189: # $cmd - The command request keyword (currentdump).
3190: # $tail - Remainder of the request, consisting of a colon
3191: # separated list that has the domain/username and
3192: # the namespace to dump (database file).
3193: # $client - file open on the remote client.
3194: # Returns:
3195: # 1 - Continue processing.
3196: # 0 - Exit the server.
3197: #
3198: sub dump_profile_database {
3199: my ($cmd, $tail, $client) = @_;
3200:
3201: my $userinput = "$cmd:$tail";
3202:
3203: my ($udom,$uname,$namespace) = split(/:/,$tail);
3204: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3205: &GDBM_READER());
3206: if ($hashref) {
3207: # Structure of %data:
3208: # $data{$symb}->{$parameter}=$value;
3209: # $data{$symb}->{'v.'.$parameter}=$version;
3210: # since $parameter will be unescaped, we do not
3211: # have to worry about silly parameter names...
3212:
3213: my $qresult='';
3214: my %data = (); # A hash of anonymous hashes..
3215: while (my ($key,$value) = each(%$hashref)) {
3216: my ($v,$symb,$param) = split(/:/,$key);
3217: next if ($v eq 'version' || $symb eq 'keys');
3218: next if (exists($data{$symb}) &&
3219: exists($data{$symb}->{$param}) &&
3220: $data{$symb}->{'v.'.$param} > $v);
3221: $data{$symb}->{$param}=$value;
3222: $data{$symb}->{'v.'.$param}=$v;
3223: }
3224: if (&untie_user_hash($hashref)) {
3225: while (my ($symb,$param_hash) = each(%data)) {
3226: while(my ($param,$value) = each (%$param_hash)){
3227: next if ($param =~ /^v\./); # Ignore versions...
3228: #
3229: # Just dump the symb=value pairs separated by &
3230: #
3231: $qresult.=$symb.':'.$param.'='.$value.'&';
3232: }
3233: }
3234: chop($qresult);
3235: &Reply($client , \$qresult, $userinput);
3236: } else {
3237: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3238: "while attempting currentdump\n", $userinput);
3239: }
3240: } else {
3241: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3242: "while attempting currentdump\n", $userinput);
3243: }
3244:
3245: return 1;
3246: }
3247: ®ister_handler("currentdump", \&dump_profile_database, 0, 1, 0);
3248:
3249: #
3250: # Dump a profile database with an optional regular expression
3251: # to match against the keys. In this dump, no effort is made
3252: # to separate symb from version information. Presumably the
3253: # databases that are dumped by this command are of a different
3254: # structure. Need to look at this and improve the documentation of
3255: # both this and the currentdump handler.
3256: # Parameters:
3257: # $cmd - The command keyword.
3258: # $tail - All of the characters after the $cmd:
3259: # These are expected to be a colon
3260: # separated list containing:
3261: # domain/user - identifying the user.
3262: # namespace - identifying the database.
3263: # regexp - optional regular expression
3264: # that is matched against
3265: # database keywords to do
3266: # selective dumps.
3267: # range - optional range of entries
3268: # e.g., 10-20 would return the
3269: # 10th to 19th items, etc.
3270: # $client - Channel open on the client.
3271: # Returns:
3272: # 1 - Continue processing.
3273: # Side effects:
3274: # response is written to $client.
3275: #
3276: sub dump_with_regexp {
3277: my ($cmd, $tail, $client) = @_;
3278:
3279: my $res = LONCAPA::Lond::dump_with_regexp($tail, $clientversion);
3280:
3281: if ($res =~ /^error:/) {
3282: &Failure($client, \$res, "$cmd:$tail");
3283: } else {
3284: &Reply($client, \$res, "$cmd:$tail");
3285: }
3286:
3287: return 1;
3288: }
3289: ®ister_handler("dump", \&dump_with_regexp, 0, 1, 0);
3290:
3291: # Store a set of key=value pairs associated with a versioned name.
3292: #
3293: # Parameters:
3294: # $cmd - Request command keyword.
3295: # $tail - Tail of the request. This is a colon
3296: # separated list containing:
3297: # domain/user - User and authentication domain.
3298: # namespace - Name of the database being modified
3299: # rid - Resource keyword to modify.
3300: # what - new value associated with rid.
3301: #
3302: # $client - Socket open on the client.
3303: #
3304: #
3305: # Returns:
3306: # 1 (keep on processing).
3307: # Side-Effects:
3308: # Writes to the client
3309: sub store_handler {
3310: my ($cmd, $tail, $client) = @_;
3311:
3312: my $userinput = "$cmd:$tail";
3313:
3314: my ($udom,$uname,$namespace,$rid,$what) =split(/:/,$tail);
3315: if ($namespace ne 'roles') {
3316:
3317: chomp($what);
3318: my @pairs=split(/\&/,$what);
3319: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3320: &GDBM_WRCREAT(), "S",
3321: "$rid:$what");
3322: if ($hashref) {
3323: my $now = time;
3324: my @previouskeys=split(/&/,$hashref->{"keys:$rid"});
3325: my $key;
3326: $hashref->{"version:$rid"}++;
3327: my $version=$hashref->{"version:$rid"};
3328: my $allkeys='';
3329: foreach my $pair (@pairs) {
3330: my ($key,$value)=split(/=/,$pair);
3331: $allkeys.=$key.':';
3332: $hashref->{"$version:$rid:$key"}=$value;
3333: }
3334: $hashref->{"$version:$rid:timestamp"}=$now;
3335: $allkeys.='timestamp';
3336: $hashref->{"$version:keys:$rid"}=$allkeys;
3337: if (&untie_user_hash($hashref)) {
3338: &Reply($client, "ok\n", $userinput);
3339: } else {
3340: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3341: "while attempting store\n", $userinput);
3342: }
3343: } else {
3344: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3345: "while attempting store\n", $userinput);
3346: }
3347: } else {
3348: &Failure($client, "refused\n", $userinput);
3349: }
3350:
3351: return 1;
3352: }
3353: ®ister_handler("store", \&store_handler, 0, 1, 0);
3354:
3355: # Modify a set of key=value pairs associated with a versioned name.
3356: #
3357: # Parameters:
3358: # $cmd - Request command keyword.
3359: # $tail - Tail of the request. This is a colon
3360: # separated list containing:
3361: # domain/user - User and authentication domain.
3362: # namespace - Name of the database being modified
3363: # rid - Resource keyword to modify.
3364: # v - Version item to modify
3365: # what - new value associated with rid.
3366: #
3367: # $client - Socket open on the client.
3368: #
3369: #
3370: # Returns:
3371: # 1 (keep on processing).
3372: # Side-Effects:
3373: # Writes to the client
3374: sub putstore_handler {
3375: my ($cmd, $tail, $client) = @_;
3376:
3377: my $userinput = "$cmd:$tail";
3378:
3379: my ($udom,$uname,$namespace,$rid,$v,$what) =split(/:/,$tail);
3380: if ($namespace ne 'roles') {
3381:
3382: chomp($what);
3383: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3384: &GDBM_WRCREAT(), "M",
3385: "$rid:$v:$what");
3386: if ($hashref) {
3387: my $now = time;
3388: my %data = &hash_extract($what);
3389: my @allkeys;
3390: while (my($key,$value) = each(%data)) {
3391: push(@allkeys,$key);
3392: $hashref->{"$v:$rid:$key"} = $value;
3393: }
3394: my $allkeys = join(':',@allkeys);
3395: $hashref->{"$v:keys:$rid"}=$allkeys;
3396:
3397: if (&untie_user_hash($hashref)) {
3398: &Reply($client, "ok\n", $userinput);
3399: } else {
3400: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3401: "while attempting store\n", $userinput);
3402: }
3403: } else {
3404: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3405: "while attempting store\n", $userinput);
3406: }
3407: } else {
3408: &Failure($client, "refused\n", $userinput);
3409: }
3410:
3411: return 1;
3412: }
3413: ®ister_handler("putstore", \&putstore_handler, 0, 1, 0);
3414:
3415: sub hash_extract {
3416: my ($str)=@_;
3417: my %hash;
3418: foreach my $pair (split(/\&/,$str)) {
3419: my ($key,$value)=split(/=/,$pair);
3420: $hash{$key}=$value;
3421: }
3422: return (%hash);
3423: }
3424: sub hash_to_str {
3425: my ($hash_ref)=@_;
3426: my $str;
3427: foreach my $key (keys(%$hash_ref)) {
3428: $str.=$key.'='.$hash_ref->{$key}.'&';
3429: }
3430: $str=~s/\&$//;
3431: return $str;
3432: }
3433:
3434: #
3435: # Dump out all versions of a resource that has key=value pairs associated
3436: # with it for each version. These resources are built up via the store
3437: # command.
3438: #
3439: # Parameters:
3440: # $cmd - Command keyword.
3441: # $tail - Remainder of the request which consists of:
3442: # domain/user - User and auth. domain.
3443: # namespace - name of resource database.
3444: # rid - Resource id.
3445: # $client - socket open on the client.
3446: #
3447: # Returns:
3448: # 1 indicating the caller should not yet exit.
3449: # Side-effects:
3450: # Writes a reply to the client.
3451: # The reply is a string of the following shape:
3452: # version=current&version:keys=k1:k2...&1:k1=v1&1:k2=v2...
3453: # Where the 1 above represents version 1.
3454: # this continues for all pairs of keys in all versions.
3455: #
3456: #
3457: #
3458: #
3459: sub restore_handler {
3460: my ($cmd, $tail, $client) = @_;
3461:
3462: my $userinput = "$cmd:$tail"; # Only used for logging purposes.
3463: my ($udom,$uname,$namespace,$rid) = split(/:/,$tail);
3464: $namespace=~s/\//\_/g;
3465: $namespace = &LONCAPA::clean_username($namespace);
3466:
3467: chomp($rid);
3468: my $qresult='';
3469: my $hashref = &tie_user_hash($udom, $uname, $namespace, &GDBM_READER());
3470: if ($hashref) {
3471: my $version=$hashref->{"version:$rid"};
3472: $qresult.="version=$version&";
3473: my $scope;
3474: for ($scope=1;$scope<=$version;$scope++) {
3475: my $vkeys=$hashref->{"$scope:keys:$rid"};
3476: my @keys=split(/:/,$vkeys);
3477: my $key;
3478: $qresult.="$scope:keys=$vkeys&";
3479: foreach $key (@keys) {
3480: $qresult.="$scope:$key=".$hashref->{"$scope:$rid:$key"}."&";
3481: }
3482: }
3483: if (&untie_user_hash($hashref)) {
3484: $qresult=~s/\&$//;
3485: &Reply( $client, \$qresult, $userinput);
3486: } else {
3487: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3488: "while attempting restore\n", $userinput);
3489: }
3490: } else {
3491: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3492: "while attempting restore\n", $userinput);
3493: }
3494:
3495: return 1;
3496:
3497:
3498: }
3499: ®ister_handler("restore", \&restore_handler, 0,1,0);
3500:
3501: #
3502: # Add a chat message to a synchronous discussion board.
3503: #
3504: # Parameters:
3505: # $cmd - Request keyword.
3506: # $tail - Tail of the command. A colon separated list
3507: # containing:
3508: # cdom - Domain on which the chat board lives
3509: # cnum - Course containing the chat board.
3510: # newpost - Body of the posting.
3511: # group - Optional group, if chat board is only
3512: # accessible in a group within the course
3513: # $client - Socket open on the client.
3514: # Returns:
3515: # 1 - Indicating caller should keep on processing.
3516: #
3517: # Side-effects:
3518: # writes a reply to the client.
3519: #
3520: #
3521: sub send_chat_handler {
3522: my ($cmd, $tail, $client) = @_;
3523:
3524:
3525: my $userinput = "$cmd:$tail";
3526:
3527: my ($cdom,$cnum,$newpost,$group)=split(/\:/,$tail);
3528: &chat_add($cdom,$cnum,$newpost,$group);
3529: &Reply($client, "ok\n", $userinput);
3530:
3531: return 1;
3532: }
3533: ®ister_handler("chatsend", \&send_chat_handler, 0, 1, 0);
3534:
3535: #
3536: # Retrieve the set of chat messages from a discussion board.
3537: #
3538: # Parameters:
3539: # $cmd - Command keyword that initiated the request.
3540: # $tail - Remainder of the request after the command
3541: # keyword. In this case a colon separated list of
3542: # chat domain - Which discussion board.
3543: # chat id - Discussion thread(?)
3544: # domain/user - Authentication domain and username
3545: # of the requesting person.
3546: # group - Optional course group containing
3547: # the board.
3548: # $client - Socket open on the client program.
3549: # Returns:
3550: # 1 - continue processing
3551: # Side effects:
3552: # Response is written to the client.
3553: #
3554: sub retrieve_chat_handler {
3555: my ($cmd, $tail, $client) = @_;
3556:
3557:
3558: my $userinput = "$cmd:$tail";
3559:
3560: my ($cdom,$cnum,$udom,$uname,$group)=split(/\:/,$tail);
3561: my $reply='';
3562: foreach (&get_chat($cdom,$cnum,$udom,$uname,$group)) {
3563: $reply.=&escape($_).':';
3564: }
3565: $reply=~s/\:$//;
3566: &Reply($client, \$reply, $userinput);
3567:
3568:
3569: return 1;
3570: }
3571: ®ister_handler("chatretr", \&retrieve_chat_handler, 0, 1, 0);
3572:
3573: #
3574: # Initiate a query of an sql database. SQL query repsonses get put in
3575: # a file for later retrieval. This prevents sql query results from
3576: # bottlenecking the system. Note that with loncnew, perhaps this is
3577: # less of an issue since multiple outstanding requests can be concurrently
3578: # serviced.
3579: #
3580: # Parameters:
3581: # $cmd - COmmand keyword that initiated the request.
3582: # $tail - Remainder of the command after the keyword.
3583: # For this function, this consists of a query and
3584: # 3 arguments that are self-documentingly labelled
3585: # in the original arg1, arg2, arg3.
3586: # $client - Socket open on the client.
3587: # Return:
3588: # 1 - Indicating processing should continue.
3589: # Side-effects:
3590: # a reply is written to $client.
3591: #
3592: sub send_query_handler {
3593: my ($cmd, $tail, $client) = @_;
3594:
3595:
3596: my $userinput = "$cmd:$tail";
3597:
3598: my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail);
3599: $query=~s/\n*$//g;
3600: &Reply($client, "". &sql_reply("$clientname\&$query".
3601: "\&$arg1"."\&$arg2"."\&$arg3")."\n",
3602: $userinput);
3603:
3604: return 1;
3605: }
3606: ®ister_handler("querysend", \&send_query_handler, 0, 1, 0);
3607:
3608: #
3609: # Add a reply to an sql query. SQL queries are done asyncrhonously.
3610: # The query is submitted via a "querysend" transaction.
3611: # There it is passed on to the lonsql daemon, queued and issued to
3612: # mysql.
3613: # This transaction is invoked when the sql transaction is complete
3614: # it stores the query results in flie and indicates query completion.
3615: # presumably local software then fetches this response... I'm guessing
3616: # the sequence is: lonc does a querysend, we ask lonsql to do it.
3617: # lonsql on completion of the query interacts with the lond of our
3618: # client to do a query reply storing two files:
3619: # - id - The results of the query.
3620: # - id.end - Indicating the transaction completed.
3621: # NOTE: id is a unique id assigned to the query and querysend time.
3622: # Parameters:
3623: # $cmd - Command keyword that initiated this request.
3624: # $tail - Remainder of the tail. In this case that's a colon
3625: # separated list containing the query Id and the
3626: # results of the query.
3627: # $client - Socket open on the client.
3628: # Return:
3629: # 1 - Indicating that we should continue processing.
3630: # Side effects:
3631: # ok written to the client.
3632: #
3633: sub reply_query_handler {
3634: my ($cmd, $tail, $client) = @_;
3635:
3636:
3637: my $userinput = "$cmd:$tail";
3638:
3639: my ($id,$reply)=split(/:/,$tail);
3640: my $store;
3641: my $execdir=$perlvar{'lonDaemons'};
3642: if ($store=IO::File->new(">$execdir/tmp/$id")) {
3643: $reply=~s/\&/\n/g;
3644: print $store $reply;
3645: close $store;
3646: my $store2=IO::File->new(">$execdir/tmp/$id.end");
3647: print $store2 "done\n";
3648: close $store2;
3649: &Reply($client, "ok\n", $userinput);
3650: } else {
3651: &Failure($client, "error: ".($!+0)
3652: ." IO::File->new Failed ".
3653: "while attempting queryreply\n", $userinput);
3654: }
3655:
3656:
3657: return 1;
3658: }
3659: ®ister_handler("queryreply", \&reply_query_handler, 0, 1, 0);
3660:
3661: #
3662: # Process the courseidput request. Not quite sure what this means
3663: # at the system level sense. It appears a gdbm file in the
3664: # /home/httpd/lonUsers/$domain/nohist_courseids is tied and
3665: # a set of entries made in that database.
3666: #
3667: # Parameters:
3668: # $cmd - The command keyword that initiated this request.
3669: # $tail - Tail of the command. In this case consists of a colon
3670: # separated list contaning the domain to apply this to and
3671: # an ampersand separated list of keyword=value pairs.
3672: # Each value is a colon separated list that includes:
3673: # description, institutional code and course owner.
3674: # For backward compatibility with versions included
3675: # in LON-CAPA 1.1.X (and earlier) and 1.2.X, institutional
3676: # code and/or course owner are preserved from the existing
3677: # record when writing a new record in response to 1.1 or
3678: # 1.2 implementations of lonnet::flushcourselogs().
3679: #
3680: # $client - Socket open on the client.
3681: # Returns:
3682: # 1 - indicating that processing should continue
3683: #
3684: # Side effects:
3685: # reply is written to the client.
3686: #
3687: sub put_course_id_handler {
3688: my ($cmd, $tail, $client) = @_;
3689:
3690:
3691: my $userinput = "$cmd:$tail";
3692:
3693: my ($udom, $what) = split(/:/, $tail,2);
3694: chomp($what);
3695: my $now=time;
3696: my @pairs=split(/\&/,$what);
3697:
3698: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3699: if ($hashref) {
3700: foreach my $pair (@pairs) {
3701: my ($key,$courseinfo) = split(/=/,$pair,2);
3702: $courseinfo =~ s/=/:/g;
3703: if (defined($hashref->{$key})) {
3704: my $value = &Apache::lonnet::thaw_unescape($hashref->{$key});
3705: if (ref($value) eq 'HASH') {
3706: my @items = ('description','inst_code','owner','type');
3707: my @new_items = split(/:/,$courseinfo,-1);
3708: my %storehash;
3709: for (my $i=0; $i<@new_items; $i++) {
3710: $storehash{$items[$i]} = &unescape($new_items[$i]);
3711: }
3712: $hashref->{$key} =
3713: &Apache::lonnet::freeze_escape(\%storehash);
3714: my $unesc_key = &unescape($key);
3715: $hashref->{&escape('lasttime:'.$unesc_key)} = $now;
3716: next;
3717: }
3718: }
3719: my @current_items = split(/:/,$hashref->{$key},-1);
3720: shift(@current_items); # remove description
3721: pop(@current_items); # remove last access
3722: my $numcurrent = scalar(@current_items);
3723: if ($numcurrent > 3) {
3724: $numcurrent = 3;
3725: }
3726: my @new_items = split(/:/,$courseinfo,-1);
3727: my $numnew = scalar(@new_items);
3728: if ($numcurrent > 0) {
3729: if ($numnew <= $numcurrent) { # flushcourselogs() from pre 2.2
3730: for (my $j=$numcurrent-$numnew; $j>=0; $j--) {
3731: $courseinfo .= ':'.$current_items[$numcurrent-$j-1];
3732: }
3733: }
3734: }
3735: $hashref->{$key}=$courseinfo.':'.$now;
3736: }
3737: if (&untie_domain_hash($hashref)) {
3738: &Reply( $client, "ok\n", $userinput);
3739: } else {
3740: &Failure($client, "error: ".($!+0)
3741: ." untie(GDBM) Failed ".
3742: "while attempting courseidput\n", $userinput);
3743: }
3744: } else {
3745: &Failure($client, "error: ".($!+0)
3746: ." tie(GDBM) Failed ".
3747: "while attempting courseidput\n", $userinput);
3748: }
3749:
3750: return 1;
3751: }
3752: ®ister_handler("courseidput", \&put_course_id_handler, 0, 1, 0);
3753:
3754: sub put_course_id_hash_handler {
3755: my ($cmd, $tail, $client) = @_;
3756: my $userinput = "$cmd:$tail";
3757: my ($udom,$mode,$what) = split(/:/, $tail,3);
3758: chomp($what);
3759: my $now=time;
3760: my @pairs=split(/\&/,$what);
3761: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3762: if ($hashref) {
3763: foreach my $pair (@pairs) {
3764: my ($key,$value)=split(/=/,$pair);
3765: my $unesc_key = &unescape($key);
3766: if ($mode ne 'timeonly') {
3767: if (!defined($hashref->{&escape('lasttime:'.$unesc_key)})) {
3768: my $curritems = &Apache::lonnet::thaw_unescape($key);
3769: if (ref($curritems) ne 'HASH') {
3770: my @current_items = split(/:/,$hashref->{$key},-1);
3771: my $lasttime = pop(@current_items);
3772: $hashref->{&escape('lasttime:'.$unesc_key)} = $lasttime;
3773: } else {
3774: $hashref->{&escape('lasttime:'.$unesc_key)} = '';
3775: }
3776: }
3777: $hashref->{$key} = $value;
3778: }
3779: if ($mode ne 'notime') {
3780: $hashref->{&escape('lasttime:'.$unesc_key)} = $now;
3781: }
3782: }
3783: if (&untie_domain_hash($hashref)) {
3784: &Reply($client, "ok\n", $userinput);
3785: } else {
3786: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3787: "while attempting courseidputhash\n", $userinput);
3788: }
3789: } else {
3790: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3791: "while attempting courseidputhash\n", $userinput);
3792: }
3793: return 1;
3794: }
3795: ®ister_handler("courseidputhash", \&put_course_id_hash_handler, 0, 1, 0);
3796:
3797: # Retrieves the value of a course id resource keyword pattern
3798: # defined since a starting date. Both the starting date and the
3799: # keyword pattern are optional. If the starting date is not supplied it
3800: # is treated as the beginning of time. If the pattern is not found,
3801: # it is treatred as "." matching everything.
3802: #
3803: # Parameters:
3804: # $cmd - Command keyword that resulted in us being dispatched.
3805: # $tail - The remainder of the command that, in this case, consists
3806: # of a colon separated list of:
3807: # domain - The domain in which the course database is
3808: # defined.
3809: # since - Optional parameter describing the minimum
3810: # time of definition(?) of the resources that
3811: # will match the dump.
3812: # description - regular expression that is used to filter
3813: # the dump. Only keywords matching this regexp
3814: # will be used.
3815: # institutional code - optional supplied code to filter
3816: # the dump. Only courses with an institutional code
3817: # that match the supplied code will be returned.
3818: # owner - optional supplied username and domain of owner to
3819: # filter the dump. Only courses for which the course
3820: # owner matches the supplied username and/or domain
3821: # will be returned. Pre-2.2.0 legacy entries from
3822: # nohist_courseiddump will only contain usernames.
3823: # type - optional parameter for selection
3824: # regexp_ok - if 1 or -1 allow the supplied institutional code
3825: # filter to behave as a regular expression:
3826: # 1 will not exclude the course if the instcode matches the RE
3827: # -1 will exclude the course if the instcode matches the RE
3828: # rtn_as_hash - whether to return the information available for
3829: # each matched item as a frozen hash of all
3830: # key, value pairs in the item's hash, or as a
3831: # colon-separated list of (in order) description,
3832: # institutional code, and course owner.
3833: # selfenrollonly - filter by courses allowing self-enrollment
3834: # now or in the future (selfenrollonly = 1).
3835: # catfilter - filter by course category, assigned to a course
3836: # using manually defined categories (i.e., not
3837: # self-cataloging based on on institutional code).
3838: # showhidden - include course in results even if course
3839: # was set to be excluded from course catalog (DC only).
3840: # caller - if set to 'coursecatalog', courses set to be hidden
3841: # from course catalog will be excluded from results (unless
3842: # overridden by "showhidden".
3843: # cloner - escaped username:domain of course cloner (if picking course to
3844: # clone).
3845: # cc_clone_list - escaped comma separated list of courses for which
3846: # course cloner has active CC role (and so can clone
3847: # automatically).
3848: # cloneonly - filter by courses for which cloner has rights to clone.
3849: # createdbefore - include courses for which creation date preceeded this date.
3850: # createdafter - include courses for which creation date followed this date.
3851: # creationcontext - include courses created in specified context
3852: #
3853: # domcloner - flag to indicate if user can create CCs in course's domain.
3854: # If so, ability to clone course is automatic.
3855: #
3856: # $client - The socket open on the client.
3857: # Returns:
3858: # 1 - Continue processing.
3859: # Side Effects:
3860: # a reply is written to $client.
3861: sub dump_course_id_handler {
3862: my ($cmd, $tail, $client) = @_;
3863: my $userinput = "$cmd:$tail";
3864:
3865: my ($udom,$since,$description,$instcodefilter,$ownerfilter,$coursefilter,
3866: $typefilter,$regexp_ok,$rtn_as_hash,$selfenrollonly,$catfilter,$showhidden,
3867: $caller,$cloner,$cc_clone_list,$cloneonly,$createdbefore,$createdafter,
3868: $creationcontext,$domcloner) =split(/:/,$tail);
3869: my $now = time;
3870: my ($cloneruname,$clonerudom,%cc_clone);
3871: if (defined($description)) {
3872: $description=&unescape($description);
3873: } else {
3874: $description='.';
3875: }
3876: if (defined($instcodefilter)) {
3877: $instcodefilter=&unescape($instcodefilter);
3878: } else {
3879: $instcodefilter='.';
3880: }
3881: my ($ownerunamefilter,$ownerdomfilter);
3882: if (defined($ownerfilter)) {
3883: $ownerfilter=&unescape($ownerfilter);
3884: if ($ownerfilter ne '.' && defined($ownerfilter)) {
3885: if ($ownerfilter =~ /^([^:]*):([^:]*)$/) {
3886: $ownerunamefilter = $1;
3887: $ownerdomfilter = $2;
3888: } else {
3889: $ownerunamefilter = $ownerfilter;
3890: $ownerdomfilter = '';
3891: }
3892: }
3893: } else {
3894: $ownerfilter='.';
3895: }
3896:
3897: if (defined($coursefilter)) {
3898: $coursefilter=&unescape($coursefilter);
3899: } else {
3900: $coursefilter='.';
3901: }
3902: if (defined($typefilter)) {
3903: $typefilter=&unescape($typefilter);
3904: } else {
3905: $typefilter='.';
3906: }
3907: if (defined($regexp_ok)) {
3908: $regexp_ok=&unescape($regexp_ok);
3909: }
3910: if (defined($catfilter)) {
3911: $catfilter=&unescape($catfilter);
3912: }
3913: if (defined($cloner)) {
3914: $cloner = &unescape($cloner);
3915: ($cloneruname,$clonerudom) = ($cloner =~ /^($LONCAPA::match_username):($LONCAPA::match_domain)$/);
3916: }
3917: if (defined($cc_clone_list)) {
3918: $cc_clone_list = &unescape($cc_clone_list);
3919: my @cc_cloners = split('&',$cc_clone_list);
3920: foreach my $cid (@cc_cloners) {
3921: my ($clonedom,$clonenum) = split(':',$cid);
3922: next if ($clonedom ne $udom);
3923: $cc_clone{$clonedom.'_'.$clonenum} = 1;
3924: }
3925: }
3926: if ($createdbefore ne '') {
3927: $createdbefore = &unescape($createdbefore);
3928: } else {
3929: $createdbefore = 0;
3930: }
3931: if ($createdafter ne '') {
3932: $createdafter = &unescape($createdafter);
3933: } else {
3934: $createdafter = 0;
3935: }
3936: if ($creationcontext ne '') {
3937: $creationcontext = &unescape($creationcontext);
3938: } else {
3939: $creationcontext = '.';
3940: }
3941: my $unpack = 1;
3942: if ($description eq '.' && $instcodefilter eq '.' && $ownerfilter eq '.' &&
3943: $typefilter eq '.') {
3944: $unpack = 0;
3945: }
3946: if (!defined($since)) { $since=0; }
3947: my $qresult='';
3948: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3949: if ($hashref) {
3950: while (my ($key,$value) = each(%$hashref)) {
3951: my ($unesc_key,$lasttime_key,$lasttime,$is_hash,%val,
3952: %unesc_val,$selfenroll_end,$selfenroll_types,$created,
3953: $context);
3954: $unesc_key = &unescape($key);
3955: if ($unesc_key =~ /^lasttime:/) {
3956: next;
3957: } else {
3958: $lasttime_key = &escape('lasttime:'.$unesc_key);
3959: }
3960: if ($hashref->{$lasttime_key} ne '') {
3961: $lasttime = $hashref->{$lasttime_key};
3962: next if ($lasttime<$since);
3963: }
3964: my ($canclone,$valchange);
3965: my $items = &Apache::lonnet::thaw_unescape($value);
3966: if (ref($items) eq 'HASH') {
3967: if ($hashref->{$lasttime_key} eq '') {
3968: next if ($since > 1);
3969: }
3970: $is_hash = 1;
3971: if ($domcloner) {
3972: $canclone = 1;
3973: } elsif (defined($clonerudom)) {
3974: if ($items->{'cloners'}) {
3975: my @cloneable = split(',',$items->{'cloners'});
3976: if (@cloneable) {
3977: if (grep(/^\*$/,@cloneable)) {
3978: $canclone = 1;
3979: } elsif (grep(/^\*:\Q$clonerudom\E$/,@cloneable)) {
3980: $canclone = 1;
3981: } elsif (grep(/^\Q$cloneruname\E:\Q$clonerudom\E$/,@cloneable)) {
3982: $canclone = 1;
3983: }
3984: }
3985: unless ($canclone) {
3986: if ($cloneruname ne '' && $clonerudom ne '') {
3987: if ($cc_clone{$unesc_key}) {
3988: $canclone = 1;
3989: $items->{'cloners'} .= ','.$cloneruname.':'.
3990: $clonerudom;
3991: $valchange = 1;
3992: }
3993: }
3994: }
3995: } elsif (defined($cloneruname)) {
3996: if ($cc_clone{$unesc_key}) {
3997: $canclone = 1;
3998: $items->{'cloners'} = $cloneruname.':'.$clonerudom;
3999: $valchange = 1;
4000: }
4001: unless ($canclone) {
4002: if ($items->{'owner'} =~ /:/) {
4003: if ($items->{'owner'} eq $cloner) {
4004: $canclone = 1;
4005: }
4006: } elsif ($cloner eq $items->{'owner'}.':'.$udom) {
4007: $canclone = 1;
4008: }
4009: if ($canclone) {
4010: $items->{'cloners'} = $cloneruname.':'.$clonerudom;
4011: $valchange = 1;
4012: }
4013: }
4014: }
4015: }
4016: if ($unpack || !$rtn_as_hash) {
4017: $unesc_val{'descr'} = $items->{'description'};
4018: $unesc_val{'inst_code'} = $items->{'inst_code'};
4019: $unesc_val{'owner'} = $items->{'owner'};
4020: $unesc_val{'type'} = $items->{'type'};
4021: $unesc_val{'cloners'} = $items->{'cloners'};
4022: $unesc_val{'created'} = $items->{'created'};
4023: $unesc_val{'context'} = $items->{'context'};
4024: }
4025: $selfenroll_types = $items->{'selfenroll_types'};
4026: $selfenroll_end = $items->{'selfenroll_end_date'};
4027: $created = $items->{'created'};
4028: $context = $items->{'context'};
4029: if ($selfenrollonly) {
4030: next if (!$selfenroll_types);
4031: if (($selfenroll_end > 0) && ($selfenroll_end <= $now)) {
4032: next;
4033: }
4034: }
4035: if ($creationcontext ne '.') {
4036: next if (($context ne '') && ($context ne $creationcontext));
4037: }
4038: if ($createdbefore > 0) {
4039: next if (($created eq '') || ($created > $createdbefore));
4040: }
4041: if ($createdafter > 0) {
4042: next if (($created eq '') || ($created <= $createdafter));
4043: }
4044: if ($catfilter ne '') {
4045: next if ($items->{'categories'} eq '');
4046: my @categories = split('&',$items->{'categories'});
4047: next if (@categories == 0);
4048: my @subcats = split('&',$catfilter);
4049: my $matchcat = 0;
4050: foreach my $cat (@categories) {
4051: if (grep(/^\Q$cat\E$/,@subcats)) {
4052: $matchcat = 1;
4053: last;
4054: }
4055: }
4056: next if (!$matchcat);
4057: }
4058: if ($caller eq 'coursecatalog') {
4059: if ($items->{'hidefromcat'} eq 'yes') {
4060: next if !$showhidden;
4061: }
4062: }
4063: } else {
4064: next if ($catfilter ne '');
4065: next if ($selfenrollonly);
4066: next if ($createdbefore || $createdafter);
4067: next if ($creationcontext ne '.');
4068: if ((defined($clonerudom)) && (defined($cloneruname))) {
4069: if ($cc_clone{$unesc_key}) {
4070: $canclone = 1;
4071: $val{'cloners'} = &escape($cloneruname.':'.$clonerudom);
4072: }
4073: }
4074: $is_hash = 0;
4075: my @courseitems = split(/:/,$value);
4076: $lasttime = pop(@courseitems);
4077: if ($hashref->{$lasttime_key} eq '') {
4078: next if ($lasttime<$since);
4079: }
4080: ($val{'descr'},$val{'inst_code'},$val{'owner'},$val{'type'}) = @courseitems;
4081: }
4082: if ($cloneonly) {
4083: next unless ($canclone);
4084: }
4085: my $match = 1;
4086: if ($description ne '.') {
4087: if (!$is_hash) {
4088: $unesc_val{'descr'} = &unescape($val{'descr'});
4089: }
4090: if (eval{$unesc_val{'descr'} !~ /\Q$description\E/i}) {
4091: $match = 0;
4092: }
4093: }
4094: if ($instcodefilter ne '.') {
4095: if (!$is_hash) {
4096: $unesc_val{'inst_code'} = &unescape($val{'inst_code'});
4097: }
4098: if ($regexp_ok == 1) {
4099: if (eval{$unesc_val{'inst_code'} !~ /$instcodefilter/}) {
4100: $match = 0;
4101: }
4102: } elsif ($regexp_ok == -1) {
4103: if (eval{$unesc_val{'inst_code'} =~ /$instcodefilter/}) {
4104: $match = 0;
4105: }
4106: } else {
4107: if (eval{$unesc_val{'inst_code'} !~ /\Q$instcodefilter\E/i}) {
4108: $match = 0;
4109: }
4110: }
4111: }
4112: if ($ownerfilter ne '.') {
4113: if (!$is_hash) {
4114: $unesc_val{'owner'} = &unescape($val{'owner'});
4115: }
4116: if (($ownerunamefilter ne '') && ($ownerdomfilter ne '')) {
4117: if ($unesc_val{'owner'} =~ /:/) {
4118: if (eval{$unesc_val{'owner'} !~
4119: /\Q$ownerunamefilter\E:\Q$ownerdomfilter\E$/i}) {
4120: $match = 0;
4121: }
4122: } else {
4123: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) {
4124: $match = 0;
4125: }
4126: }
4127: } elsif ($ownerunamefilter ne '') {
4128: if ($unesc_val{'owner'} =~ /:/) {
4129: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E:[^:]+$/i}) {
4130: $match = 0;
4131: }
4132: } else {
4133: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) {
4134: $match = 0;
4135: }
4136: }
4137: } elsif ($ownerdomfilter ne '') {
4138: if ($unesc_val{'owner'} =~ /:/) {
4139: if (eval{$unesc_val{'owner'} !~ /^[^:]+:\Q$ownerdomfilter\E/}) {
4140: $match = 0;
4141: }
4142: } else {
4143: if ($ownerdomfilter ne $udom) {
4144: $match = 0;
4145: }
4146: }
4147: }
4148: }
4149: if ($coursefilter ne '.') {
4150: if (eval{$unesc_key !~ /^$udom(_)\Q$coursefilter\E$/}) {
4151: $match = 0;
4152: }
4153: }
4154: if ($typefilter ne '.') {
4155: if (!$is_hash) {
4156: $unesc_val{'type'} = &unescape($val{'type'});
4157: }
4158: if ($unesc_val{'type'} eq '') {
4159: if ($typefilter ne 'Course') {
4160: $match = 0;
4161: }
4162: } else {
4163: if (eval{$unesc_val{'type'} !~ /^\Q$typefilter\E$/}) {
4164: $match = 0;
4165: }
4166: }
4167: }
4168: if ($match == 1) {
4169: if ($rtn_as_hash) {
4170: if ($is_hash) {
4171: if ($valchange) {
4172: my $newvalue = &Apache::lonnet::freeze_escape($items);
4173: $qresult.=$key.'='.$newvalue.'&';
4174: } else {
4175: $qresult.=$key.'='.$value.'&';
4176: }
4177: } else {
4178: my %rtnhash = ( 'description' => &unescape($val{'descr'}),
4179: 'inst_code' => &unescape($val{'inst_code'}),
4180: 'owner' => &unescape($val{'owner'}),
4181: 'type' => &unescape($val{'type'}),
4182: 'cloners' => &unescape($val{'cloners'}),
4183: );
4184: my $items = &Apache::lonnet::freeze_escape(\%rtnhash);
4185: $qresult.=$key.'='.$items.'&';
4186: }
4187: } else {
4188: if ($is_hash) {
4189: $qresult .= $key.'='.&escape($unesc_val{'descr'}).':'.
4190: &escape($unesc_val{'inst_code'}).':'.
4191: &escape($unesc_val{'owner'}).'&';
4192: } else {
4193: $qresult .= $key.'='.$val{'descr'}.':'.$val{'inst_code'}.
4194: ':'.$val{'owner'}.'&';
4195: }
4196: }
4197: }
4198: }
4199: if (&untie_domain_hash($hashref)) {
4200: chop($qresult);
4201: &Reply($client, \$qresult, $userinput);
4202: } else {
4203: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4204: "while attempting courseiddump\n", $userinput);
4205: }
4206: } else {
4207: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4208: "while attempting courseiddump\n", $userinput);
4209: }
4210: return 1;
4211: }
4212: ®ister_handler("courseiddump", \&dump_course_id_handler, 0, 1, 0);
4213:
4214: sub course_lastaccess_handler {
4215: my ($cmd, $tail, $client) = @_;
4216: my $userinput = "$cmd:$tail";
4217: my ($cdom,$cnum) = split(':',$tail);
4218: my (%lastaccess,$qresult);
4219: my $hashref = &tie_domain_hash($cdom, "nohist_courseids", &GDBM_WRCREAT());
4220: if ($hashref) {
4221: while (my ($key,$value) = each(%$hashref)) {
4222: my ($unesc_key,$lasttime);
4223: $unesc_key = &unescape($key);
4224: if ($cnum) {
4225: next unless ($unesc_key =~ /\Q$cdom\E_\Q$cnum\E$/);
4226: }
4227: if ($unesc_key =~ /^lasttime:($LONCAPA::match_domain\_$LONCAPA::match_courseid)/) {
4228: $lastaccess{$1} = $value;
4229: } else {
4230: my $items = &Apache::lonnet::thaw_unescape($value);
4231: if (ref($items) eq 'HASH') {
4232: unless ($lastaccess{$unesc_key}) {
4233: $lastaccess{$unesc_key} = '';
4234: }
4235: } else {
4236: my @courseitems = split(':',$value);
4237: $lastaccess{$unesc_key} = pop(@courseitems);
4238: }
4239: }
4240: }
4241: foreach my $cid (sort(keys(%lastaccess))) {
4242: $qresult.=&escape($cid).'='.$lastaccess{$cid}.'&';
4243: }
4244: if (&untie_domain_hash($hashref)) {
4245: if ($qresult) {
4246: chop($qresult);
4247: }
4248: &Reply($client, \$qresult, $userinput);
4249: } else {
4250: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4251: "while attempting lastacourseaccess\n", $userinput);
4252: }
4253: } else {
4254: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4255: "while attempting lastcourseaccess\n", $userinput);
4256: }
4257: return 1;
4258: }
4259: ®ister_handler("courselastaccess",\&course_lastaccess_handler, 0, 1, 0);
4260:
4261: #
4262: # Puts an unencrypted entry in a namespace db file at the domain level
4263: #
4264: # Parameters:
4265: # $cmd - The command that got us here.
4266: # $tail - Tail of the command (remaining parameters).
4267: # $client - File descriptor connected to client.
4268: # Returns
4269: # 0 - Requested to exit, caller should shut down.
4270: # 1 - Continue processing.
4271: # Side effects:
4272: # reply is written to $client.
4273: #
4274: sub put_domain_handler {
4275: my ($cmd,$tail,$client) = @_;
4276:
4277: my $userinput = "$cmd:$tail";
4278:
4279: my ($udom,$namespace,$what) =split(/:/,$tail,3);
4280: chomp($what);
4281: my @pairs=split(/\&/,$what);
4282: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_WRCREAT(),
4283: "P", $what);
4284: if ($hashref) {
4285: foreach my $pair (@pairs) {
4286: my ($key,$value)=split(/=/,$pair);
4287: $hashref->{$key}=$value;
4288: }
4289: if (&untie_domain_hash($hashref)) {
4290: &Reply($client, "ok\n", $userinput);
4291: } else {
4292: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4293: "while attempting putdom\n", $userinput);
4294: }
4295: } else {
4296: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4297: "while attempting putdom\n", $userinput);
4298: }
4299:
4300: return 1;
4301: }
4302: ®ister_handler("putdom", \&put_domain_handler, 0, 1, 0);
4303:
4304: # Unencrypted get from the namespace database file at the domain level.
4305: # This function retrieves a keyed item from a specific named database in the
4306: # domain directory.
4307: #
4308: # Parameters:
4309: # $cmd - Command request keyword (get).
4310: # $tail - Tail of the command. This is a colon separated list
4311: # consisting of the domain and the 'namespace'
4312: # which selects the gdbm file to do the lookup in,
4313: # & separated list of keys to lookup. Note that
4314: # the values are returned as an & separated list too.
4315: # $client - File descriptor open on the client.
4316: # Returns:
4317: # 1 - Continue processing.
4318: # 0 - Exit.
4319: # Side effects:
4320: # reply is written to $client.
4321: #
4322:
4323: sub get_domain_handler {
4324: my ($cmd, $tail, $client) = @_;
4325:
4326:
4327: my $userinput = "$client:$tail";
4328:
4329: my ($udom,$namespace,$what)=split(/:/,$tail,3);
4330: chomp($what);
4331: my @queries=split(/\&/,$what);
4332: my $qresult='';
4333: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_READER());
4334: if ($hashref) {
4335: for (my $i=0;$i<=$#queries;$i++) {
4336: $qresult.="$hashref->{$queries[$i]}&";
4337: }
4338: if (&untie_domain_hash($hashref)) {
4339: $qresult=~s/\&$//;
4340: &Reply($client, \$qresult, $userinput);
4341: } else {
4342: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
4343: "while attempting getdom\n",$userinput);
4344: }
4345: } else {
4346: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4347: "while attempting getdom\n",$userinput);
4348: }
4349:
4350: return 1;
4351: }
4352: ®ister_handler("getdom", \&get_domain_handler, 0, 1, 0);
4353:
4354: #
4355: # Puts an id to a domains id database.
4356: #
4357: # Parameters:
4358: # $cmd - The command that triggered us.
4359: # $tail - Remainder of the request other than the command. This is a
4360: # colon separated list containing:
4361: # $domain - The domain for which we are writing the id.
4362: # $pairs - The id info to write... this is and & separated list
4363: # of keyword=value.
4364: # $client - Socket open on the client.
4365: # Returns:
4366: # 1 - Continue processing.
4367: # Side effects:
4368: # reply is written to $client.
4369: #
4370: sub put_id_handler {
4371: my ($cmd,$tail,$client) = @_;
4372:
4373:
4374: my $userinput = "$cmd:$tail";
4375:
4376: my ($udom,$what)=split(/:/,$tail);
4377: chomp($what);
4378: my @pairs=split(/\&/,$what);
4379: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
4380: "P", $what);
4381: if ($hashref) {
4382: foreach my $pair (@pairs) {
4383: my ($key,$value)=split(/=/,$pair);
4384: $hashref->{$key}=$value;
4385: }
4386: if (&untie_domain_hash($hashref)) {
4387: &Reply($client, "ok\n", $userinput);
4388: } else {
4389: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4390: "while attempting idput\n", $userinput);
4391: }
4392: } else {
4393: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4394: "while attempting idput\n", $userinput);
4395: }
4396:
4397: return 1;
4398: }
4399: ®ister_handler("idput", \&put_id_handler, 0, 1, 0);
4400:
4401: #
4402: # Retrieves a set of id values from the id database.
4403: # Returns an & separated list of results, one for each requested id to the
4404: # client.
4405: #
4406: # Parameters:
4407: # $cmd - Command keyword that caused us to be dispatched.
4408: # $tail - Tail of the command. Consists of a colon separated:
4409: # domain - the domain whose id table we dump
4410: # ids Consists of an & separated list of
4411: # id keywords whose values will be fetched.
4412: # nonexisting keywords will have an empty value.
4413: # $client - Socket open on the client.
4414: #
4415: # Returns:
4416: # 1 - indicating processing should continue.
4417: # Side effects:
4418: # An & separated list of results is written to $client.
4419: #
4420: sub get_id_handler {
4421: my ($cmd, $tail, $client) = @_;
4422:
4423:
4424: my $userinput = "$client:$tail";
4425:
4426: my ($udom,$what)=split(/:/,$tail);
4427: chomp($what);
4428: my @queries=split(/\&/,$what);
4429: my $qresult='';
4430: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_READER());
4431: if ($hashref) {
4432: for (my $i=0;$i<=$#queries;$i++) {
4433: $qresult.="$hashref->{$queries[$i]}&";
4434: }
4435: if (&untie_domain_hash($hashref)) {
4436: $qresult=~s/\&$//;
4437: &Reply($client, \$qresult, $userinput);
4438: } else {
4439: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
4440: "while attempting idget\n",$userinput);
4441: }
4442: } else {
4443: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4444: "while attempting idget\n",$userinput);
4445: }
4446:
4447: return 1;
4448: }
4449: ®ister_handler("idget", \&get_id_handler, 0, 1, 0);
4450:
4451: #
4452: # Puts broadcast e-mail sent by Domain Coordinator in nohist_dcmail database
4453: #
4454: # Parameters
4455: # $cmd - Command keyword that caused us to be dispatched.
4456: # $tail - Tail of the command. Consists of a colon separated:
4457: # domain - the domain whose dcmail we are recording
4458: # email Consists of key=value pair
4459: # where key is unique msgid
4460: # and value is message (in XML)
4461: # $client - Socket open on the client.
4462: #
4463: # Returns:
4464: # 1 - indicating processing should continue.
4465: # Side effects
4466: # reply is written to $client.
4467: #
4468: sub put_dcmail_handler {
4469: my ($cmd,$tail,$client) = @_;
4470: my $userinput = "$cmd:$tail";
4471:
4472:
4473: my ($udom,$what)=split(/:/,$tail);
4474: chomp($what);
4475: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
4476: if ($hashref) {
4477: my ($key,$value)=split(/=/,$what);
4478: $hashref->{$key}=$value;
4479: }
4480: if (&untie_domain_hash($hashref)) {
4481: &Reply($client, "ok\n", $userinput);
4482: } else {
4483: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4484: "while attempting dcmailput\n", $userinput);
4485: }
4486: return 1;
4487: }
4488: ®ister_handler("dcmailput", \&put_dcmail_handler, 0, 1, 0);
4489:
4490: #
4491: # Retrieves broadcast e-mail from nohist_dcmail database
4492: # Returns to client an & separated list of key=value pairs,
4493: # where key is msgid and value is message information.
4494: #
4495: # Parameters
4496: # $cmd - Command keyword that caused us to be dispatched.
4497: # $tail - Tail of the command. Consists of a colon separated:
4498: # domain - the domain whose dcmail table we dump
4499: # startfilter - beginning of time window
4500: # endfilter - end of time window
4501: # sendersfilter - & separated list of username:domain
4502: # for senders to search for.
4503: # $client - Socket open on the client.
4504: #
4505: # Returns:
4506: # 1 - indicating processing should continue.
4507: # Side effects
4508: # reply (& separated list of msgid=messageinfo pairs) is
4509: # written to $client.
4510: #
4511: sub dump_dcmail_handler {
4512: my ($cmd, $tail, $client) = @_;
4513:
4514: my $userinput = "$cmd:$tail";
4515: my ($udom,$startfilter,$endfilter,$sendersfilter) = split(/:/,$tail);
4516: chomp($sendersfilter);
4517: my @senders = ();
4518: if (defined($startfilter)) {
4519: $startfilter=&unescape($startfilter);
4520: } else {
4521: $startfilter='.';
4522: }
4523: if (defined($endfilter)) {
4524: $endfilter=&unescape($endfilter);
4525: } else {
4526: $endfilter='.';
4527: }
4528: if (defined($sendersfilter)) {
4529: $sendersfilter=&unescape($sendersfilter);
4530: @senders = map { &unescape($_) } split(/\&/,$sendersfilter);
4531: }
4532:
4533: my $qresult='';
4534: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
4535: if ($hashref) {
4536: while (my ($key,$value) = each(%$hashref)) {
4537: my $match = 1;
4538: my ($timestamp,$subj,$uname,$udom) =
4539: split(/:/,&unescape(&unescape($key)),5); # yes, twice really
4540: $subj = &unescape($subj);
4541: unless ($startfilter eq '.' || !defined($startfilter)) {
4542: if ($timestamp < $startfilter) {
4543: $match = 0;
4544: }
4545: }
4546: unless ($endfilter eq '.' || !defined($endfilter)) {
4547: if ($timestamp > $endfilter) {
4548: $match = 0;
4549: }
4550: }
4551: unless (@senders < 1) {
4552: unless (grep/^$uname:$udom$/,@senders) {
4553: $match = 0;
4554: }
4555: }
4556: if ($match == 1) {
4557: $qresult.=$key.'='.$value.'&';
4558: }
4559: }
4560: if (&untie_domain_hash($hashref)) {
4561: chop($qresult);
4562: &Reply($client, \$qresult, $userinput);
4563: } else {
4564: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4565: "while attempting dcmaildump\n", $userinput);
4566: }
4567: } else {
4568: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4569: "while attempting dcmaildump\n", $userinput);
4570: }
4571: return 1;
4572: }
4573:
4574: ®ister_handler("dcmaildump", \&dump_dcmail_handler, 0, 1, 0);
4575:
4576: #
4577: # Puts domain roles in nohist_domainroles database
4578: #
4579: # Parameters
4580: # $cmd - Command keyword that caused us to be dispatched.
4581: # $tail - Tail of the command. Consists of a colon separated:
4582: # domain - the domain whose roles we are recording
4583: # role - Consists of key=value pair
4584: # where key is unique role
4585: # and value is start/end date information
4586: # $client - Socket open on the client.
4587: #
4588: # Returns:
4589: # 1 - indicating processing should continue.
4590: # Side effects
4591: # reply is written to $client.
4592: #
4593:
4594: sub put_domainroles_handler {
4595: my ($cmd,$tail,$client) = @_;
4596:
4597: my $userinput = "$cmd:$tail";
4598: my ($udom,$what)=split(/:/,$tail);
4599: chomp($what);
4600: my @pairs=split(/\&/,$what);
4601: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
4602: if ($hashref) {
4603: foreach my $pair (@pairs) {
4604: my ($key,$value)=split(/=/,$pair);
4605: $hashref->{$key}=$value;
4606: }
4607: if (&untie_domain_hash($hashref)) {
4608: &Reply($client, "ok\n", $userinput);
4609: } else {
4610: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4611: "while attempting domroleput\n", $userinput);
4612: }
4613: } else {
4614: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4615: "while attempting domroleput\n", $userinput);
4616: }
4617:
4618: return 1;
4619: }
4620:
4621: ®ister_handler("domroleput", \&put_domainroles_handler, 0, 1, 0);
4622:
4623: #
4624: # Retrieves domain roles from nohist_domainroles database
4625: # Returns to client an & separated list of key=value pairs,
4626: # where key is role and value is start and end date information.
4627: #
4628: # Parameters
4629: # $cmd - Command keyword that caused us to be dispatched.
4630: # $tail - Tail of the command. Consists of a colon separated:
4631: # domain - the domain whose domain roles table we dump
4632: # $client - Socket open on the client.
4633: #
4634: # Returns:
4635: # 1 - indicating processing should continue.
4636: # Side effects
4637: # reply (& separated list of role=start/end info pairs) is
4638: # written to $client.
4639: #
4640: sub dump_domainroles_handler {
4641: my ($cmd, $tail, $client) = @_;
4642:
4643: my $userinput = "$cmd:$tail";
4644: my ($udom,$startfilter,$endfilter,$rolesfilter) = split(/:/,$tail);
4645: chomp($rolesfilter);
4646: my @roles = ();
4647: if (defined($startfilter)) {
4648: $startfilter=&unescape($startfilter);
4649: } else {
4650: $startfilter='.';
4651: }
4652: if (defined($endfilter)) {
4653: $endfilter=&unescape($endfilter);
4654: } else {
4655: $endfilter='.';
4656: }
4657: if (defined($rolesfilter)) {
4658: $rolesfilter=&unescape($rolesfilter);
4659: @roles = split(/\&/,$rolesfilter);
4660: }
4661:
4662: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
4663: if ($hashref) {
4664: my $qresult = '';
4665: while (my ($key,$value) = each(%$hashref)) {
4666: my $match = 1;
4667: my ($end,$start) = split(/:/,&unescape($value));
4668: my ($trole,$uname,$udom,$runame,$rudom,$rsec) = split(/:/,&unescape($key));
4669: unless (@roles < 1) {
4670: unless (grep/^\Q$trole\E$/,@roles) {
4671: $match = 0;
4672: next;
4673: }
4674: }
4675: unless ($startfilter eq '.' || !defined($startfilter)) {
4676: if ((defined($start)) && ($start >= $startfilter)) {
4677: $match = 0;
4678: next;
4679: }
4680: }
4681: unless ($endfilter eq '.' || !defined($endfilter)) {
4682: if ((defined($end)) && (($end > 0) && ($end <= $endfilter))) {
4683: $match = 0;
4684: next;
4685: }
4686: }
4687: if ($match == 1) {
4688: $qresult.=$key.'='.$value.'&';
4689: }
4690: }
4691: if (&untie_domain_hash($hashref)) {
4692: chop($qresult);
4693: &Reply($client, \$qresult, $userinput);
4694: } else {
4695: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4696: "while attempting domrolesdump\n", $userinput);
4697: }
4698: } else {
4699: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4700: "while attempting domrolesdump\n", $userinput);
4701: }
4702: return 1;
4703: }
4704:
4705: ®ister_handler("domrolesdump", \&dump_domainroles_handler, 0, 1, 0);
4706:
4707:
4708: # Process the tmpput command I'm not sure what this does.. Seems to
4709: # create a file in the lonDaemons/tmp directory of the form $id.tmp
4710: # where Id is the client's ip concatenated with a sequence number.
4711: # The file will contain some value that is passed in. Is this e.g.
4712: # a login token?
4713: #
4714: # Parameters:
4715: # $cmd - The command that got us dispatched.
4716: # $tail - The remainder of the request following $cmd:
4717: # In this case this will be the contents of the file.
4718: # $client - Socket connected to the client.
4719: # Returns:
4720: # 1 indicating processing can continue.
4721: # Side effects:
4722: # A file is created in the local filesystem.
4723: # A reply is sent to the client.
4724: sub tmp_put_handler {
4725: my ($cmd, $what, $client) = @_;
4726:
4727: my $userinput = "$cmd:$what"; # Reconstruct for logging.
4728:
4729: my ($record,$context) = split(/:/,$what);
4730: if ($context ne '') {
4731: chomp($context);
4732: $context = &unescape($context);
4733: }
4734: my ($id,$store);
4735: $tmpsnum++;
4736: if (($context eq 'resetpw') || ($context eq 'createaccount')) {
4737: $id = &md5_hex(&md5_hex(time.{}.rand().$$));
4738: } else {
4739: $id = $$.'_'.$clientip.'_'.$tmpsnum;
4740: }
4741: $id=~s/\W/\_/g;
4742: $record=~s/\n//g;
4743: my $execdir=$perlvar{'lonDaemons'};
4744: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
4745: print $store $record;
4746: close $store;
4747: &Reply($client, \$id, $userinput);
4748: } else {
4749: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
4750: "while attempting tmpput\n", $userinput);
4751: }
4752: return 1;
4753:
4754: }
4755: ®ister_handler("tmpput", \&tmp_put_handler, 0, 1, 0);
4756:
4757: # Processes the tmpget command. This command returns the contents
4758: # of a temporary resource file(?) created via tmpput.
4759: #
4760: # Paramters:
4761: # $cmd - Command that got us dispatched.
4762: # $id - Tail of the command, contain the id of the resource
4763: # we want to fetch.
4764: # $client - socket open on the client.
4765: # Return:
4766: # 1 - Inidcating processing can continue.
4767: # Side effects:
4768: # A reply is sent to the client.
4769: #
4770: sub tmp_get_handler {
4771: my ($cmd, $id, $client) = @_;
4772:
4773: my $userinput = "$cmd:$id";
4774:
4775:
4776: $id=~s/\W/\_/g;
4777: my $store;
4778: my $execdir=$perlvar{'lonDaemons'};
4779: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
4780: my $reply=<$store>;
4781: &Reply( $client, \$reply, $userinput);
4782: close $store;
4783: } else {
4784: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
4785: "while attempting tmpget\n", $userinput);
4786: }
4787:
4788: return 1;
4789: }
4790: ®ister_handler("tmpget", \&tmp_get_handler, 0, 1, 0);
4791:
4792: #
4793: # Process the tmpdel command. This command deletes a temp resource
4794: # created by the tmpput command.
4795: #
4796: # Parameters:
4797: # $cmd - Command that got us here.
4798: # $id - Id of the temporary resource created.
4799: # $client - socket open on the client process.
4800: #
4801: # Returns:
4802: # 1 - Indicating processing should continue.
4803: # Side Effects:
4804: # A file is deleted
4805: # A reply is sent to the client.
4806: sub tmp_del_handler {
4807: my ($cmd, $id, $client) = @_;
4808:
4809: my $userinput= "$cmd:$id";
4810:
4811: chomp($id);
4812: $id=~s/\W/\_/g;
4813: my $execdir=$perlvar{'lonDaemons'};
4814: if (unlink("$execdir/tmp/$id.tmp")) {
4815: &Reply($client, "ok\n", $userinput);
4816: } else {
4817: &Failure( $client, "error: ".($!+0)."Unlink tmp Failed ".
4818: "while attempting tmpdel\n", $userinput);
4819: }
4820:
4821: return 1;
4822:
4823: }
4824: ®ister_handler("tmpdel", \&tmp_del_handler, 0, 1, 0);
4825:
4826: #
4827: # Processes the setannounce command. This command
4828: # creates a file named announce.txt in the top directory of
4829: # the documentn root and sets its contents. The announce.txt file is
4830: # printed in its entirety at the LonCAPA login page. Note:
4831: # once the announcement.txt fileis created it cannot be deleted.
4832: # However, setting the contents of the file to empty removes the
4833: # announcement from the login page of loncapa so who cares.
4834: #
4835: # Parameters:
4836: # $cmd - The command that got us dispatched.
4837: # $announcement - The text of the announcement.
4838: # $client - Socket open on the client process.
4839: # Retunrns:
4840: # 1 - Indicating request processing should continue
4841: # Side Effects:
4842: # The file {DocRoot}/announcement.txt is created.
4843: # A reply is sent to $client.
4844: #
4845: sub set_announce_handler {
4846: my ($cmd, $announcement, $client) = @_;
4847:
4848: my $userinput = "$cmd:$announcement";
4849:
4850: chomp($announcement);
4851: $announcement=&unescape($announcement);
4852: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
4853: '/announcement.txt')) {
4854: print $store $announcement;
4855: close $store;
4856: &Reply($client, "ok\n", $userinput);
4857: } else {
4858: &Failure($client, "error: ".($!+0)."\n", $userinput);
4859: }
4860:
4861: return 1;
4862: }
4863: ®ister_handler("setannounce", \&set_announce_handler, 0, 1, 0);
4864:
4865: #
4866: # Return the version of the daemon. This can be used to determine
4867: # the compatibility of cross version installations or, alternatively to
4868: # simply know who's out of date and who isn't. Note that the version
4869: # is returned concatenated with the tail.
4870: # Parameters:
4871: # $cmd - the request that dispatched to us.
4872: # $tail - Tail of the request (client's version?).
4873: # $client - Socket open on the client.
4874: #Returns:
4875: # 1 - continue processing requests.
4876: # Side Effects:
4877: # Replies with version to $client.
4878: sub get_version_handler {
4879: my ($cmd, $tail, $client) = @_;
4880:
4881: my $userinput = $cmd.$tail;
4882:
4883: &Reply($client, &version($userinput)."\n", $userinput);
4884:
4885:
4886: return 1;
4887: }
4888: ®ister_handler("version", \&get_version_handler, 0, 1, 0);
4889:
4890: # Set the current host and domain. This is used to support
4891: # multihomed systems. Each IP of the system, or even separate daemons
4892: # on the same IP can be treated as handling a separate lonCAPA virtual
4893: # machine. This command selects the virtual lonCAPA. The client always
4894: # knows the right one since it is lonc and it is selecting the domain/system
4895: # from the hosts.tab file.
4896: # Parameters:
4897: # $cmd - Command that dispatched us.
4898: # $tail - Tail of the command (domain/host requested).
4899: # $socket - Socket open on the client.
4900: #
4901: # Returns:
4902: # 1 - Indicates the program should continue to process requests.
4903: # Side-effects:
4904: # The default domain/system context is modified for this daemon.
4905: # a reply is sent to the client.
4906: #
4907: sub set_virtual_host_handler {
4908: my ($cmd, $tail, $socket) = @_;
4909:
4910: my $userinput ="$cmd:$tail";
4911:
4912: &Reply($client, &sethost($userinput)."\n", $userinput);
4913:
4914:
4915: return 1;
4916: }
4917: ®ister_handler("sethost", \&set_virtual_host_handler, 0, 1, 0);
4918:
4919: # Process a request to exit:
4920: # - "bye" is sent to the client.
4921: # - The client socket is shutdown and closed.
4922: # - We indicate to the caller that we should exit.
4923: # Formal Parameters:
4924: # $cmd - The command that got us here.
4925: # $tail - Tail of the command (empty).
4926: # $client - Socket open on the tail.
4927: # Returns:
4928: # 0 - Indicating the program should exit!!
4929: #
4930: sub exit_handler {
4931: my ($cmd, $tail, $client) = @_;
4932:
4933: my $userinput = "$cmd:$tail";
4934:
4935: &logthis("Client $clientip ($clientname) hanging up: $userinput");
4936: &Reply($client, "bye\n", $userinput);
4937: $client->shutdown(2); # shutdown the socket forcibly.
4938: $client->close();
4939:
4940: return 0;
4941: }
4942: ®ister_handler("exit", \&exit_handler, 0,1,1);
4943: ®ister_handler("init", \&exit_handler, 0,1,1);
4944: ®ister_handler("quit", \&exit_handler, 0,1,1);
4945:
4946: # Determine if auto-enrollment is enabled.
4947: # Note that the original had what I believe to be a defect.
4948: # The original returned 0 if the requestor was not a registerd client.
4949: # It should return "refused".
4950: # Formal Parameters:
4951: # $cmd - The command that invoked us.
4952: # $tail - The tail of the command (Extra command parameters.
4953: # $client - The socket open on the client that issued the request.
4954: # Returns:
4955: # 1 - Indicating processing should continue.
4956: #
4957: sub enrollment_enabled_handler {
4958: my ($cmd, $tail, $client) = @_;
4959: my $userinput = $cmd.":".$tail; # For logging purposes.
4960:
4961:
4962: my ($cdom) = split(/:/, $tail, 2); # Domain we're asking about.
4963:
4964: my $outcome = &localenroll::run($cdom);
4965: &Reply($client, \$outcome, $userinput);
4966:
4967: return 1;
4968: }
4969: ®ister_handler("autorun", \&enrollment_enabled_handler, 0, 1, 0);
4970:
4971: #
4972: # Validate an institutional code used for a LON-CAPA course.
4973: #
4974: # Formal Parameters:
4975: # $cmd - The command request that got us dispatched.
4976: # $tail - The tail of the command. In this case,
4977: # this is a colon separated set of words that will be split
4978: # into:
4979: # $dom - The domain for which the check of
4980: # institutional course code will occur.
4981: #
4982: # $instcode - The institutional code for the course
4983: # being requested, or validated for rights
4984: # to request.
4985: #
4986: # $owner - The course requestor (who will be the
4987: # course owner, in the form username:domain
4988: #
4989: # $client - Socket open on the client.
4990: # Returns:
4991: # 1 - Indicating processing should continue.
4992: #
4993: sub validate_instcode_handler {
4994: my ($cmd, $tail, $client) = @_;
4995: my $userinput = "$cmd:$tail";
4996: my ($dom,$instcode,$owner) = split(/:/, $tail);
4997: $instcode = &unescape($instcode);
4998: $owner = &unescape($owner);
4999: my ($outcome,$description,$credits) =
5000: &localenroll::validate_instcode($dom,$instcode,$owner);
5001: my $result = &escape($outcome).'&'.&escape($description).'&'.
5002: &escape($credits);
5003: &Reply($client, \$result, $userinput);
5004:
5005: return 1;
5006: }
5007: ®ister_handler("autovalidateinstcode", \&validate_instcode_handler, 0, 1, 0);
5008:
5009: # Get the official sections for which auto-enrollment is possible.
5010: # Since the admin people won't know about 'unofficial sections'
5011: # we cannot auto-enroll on them.
5012: # Formal Parameters:
5013: # $cmd - The command request that got us dispatched here.
5014: # $tail - The remainder of the request. In our case this
5015: # will be split into:
5016: # $coursecode - The course name from the admin point of view.
5017: # $cdom - The course's domain(?).
5018: # $client - Socket open on the client.
5019: # Returns:
5020: # 1 - Indiciting processing should continue.
5021: #
5022: sub get_sections_handler {
5023: my ($cmd, $tail, $client) = @_;
5024: my $userinput = "$cmd:$tail";
5025:
5026: my ($coursecode, $cdom) = split(/:/, $tail);
5027: my @secs = &localenroll::get_sections($coursecode,$cdom);
5028: my $seclist = &escape(join(':',@secs));
5029:
5030: &Reply($client, \$seclist, $userinput);
5031:
5032:
5033: return 1;
5034: }
5035: ®ister_handler("autogetsections", \&get_sections_handler, 0, 1, 0);
5036:
5037: # Validate the owner of a new course section.
5038: #
5039: # Formal Parameters:
5040: # $cmd - Command that got us dispatched.
5041: # $tail - the remainder of the command. For us this consists of a
5042: # colon separated string containing:
5043: # $inst - Course Id from the institutions point of view.
5044: # $owner - Proposed owner of the course.
5045: # $cdom - Domain of the course (from the institutions
5046: # point of view?)..
5047: # $client - Socket open on the client.
5048: #
5049: # Returns:
5050: # 1 - Processing should continue.
5051: #
5052: sub validate_course_owner_handler {
5053: my ($cmd, $tail, $client) = @_;
5054: my $userinput = "$cmd:$tail";
5055: my ($inst_course_id, $owner, $cdom, $coowners) = split(/:/, $tail);
5056:
5057: $owner = &unescape($owner);
5058: $coowners = &unescape($coowners);
5059: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom,$coowners);
5060: &Reply($client, \$outcome, $userinput);
5061:
5062:
5063:
5064: return 1;
5065: }
5066: ®ister_handler("autonewcourse", \&validate_course_owner_handler, 0, 1, 0);
5067:
5068: #
5069: # Validate a course section in the official schedule of classes
5070: # from the institutions point of view (part of autoenrollment).
5071: #
5072: # Formal Parameters:
5073: # $cmd - The command request that got us dispatched.
5074: # $tail - The tail of the command. In this case,
5075: # this is a colon separated set of words that will be split
5076: # into:
5077: # $inst_course_id - The course/section id from the
5078: # institutions point of view.
5079: # $cdom - The domain from the institutions
5080: # point of view.
5081: # $client - Socket open on the client.
5082: # Returns:
5083: # 1 - Indicating processing should continue.
5084: #
5085: sub validate_course_section_handler {
5086: my ($cmd, $tail, $client) = @_;
5087: my $userinput = "$cmd:$tail";
5088: my ($inst_course_id, $cdom) = split(/:/, $tail);
5089:
5090: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
5091: &Reply($client, \$outcome, $userinput);
5092:
5093:
5094: return 1;
5095: }
5096: ®ister_handler("autovalidatecourse", \&validate_course_section_handler, 0, 1, 0);
5097:
5098: #
5099: # Validate course owner's access to enrollment data for specific class section.
5100: #
5101: #
5102: # Formal Parameters:
5103: # $cmd - The command request that got us dispatched.
5104: # $tail - The tail of the command. In this case this is a colon separated
5105: # set of words that will be split into:
5106: # $inst_class - Institutional code for the specific class section
5107: # $courseowner - The escaped username:domain of the course owner
5108: # $cdom - The domain of the course from the institution's
5109: # point of view.
5110: # $client - The socket open on the client.
5111: # Returns:
5112: # 1 - continue processing.
5113: #
5114:
5115: sub validate_class_access_handler {
5116: my ($cmd, $tail, $client) = @_;
5117: my $userinput = "$cmd:$tail";
5118: my ($inst_class,$ownerlist,$cdom) = split(/:/, $tail);
5119: my $owners = &unescape($ownerlist);
5120: my $outcome;
5121: eval {
5122: local($SIG{__DIE__})='DEFAULT';
5123: $outcome=&localenroll::check_section($inst_class,$owners,$cdom);
5124: };
5125: &Reply($client,\$outcome, $userinput);
5126:
5127: return 1;
5128: }
5129: ®ister_handler("autovalidateclass_sec", \&validate_class_access_handler, 0, 1, 0);
5130:
5131: #
5132: # Create a password for a new LON-CAPA user added by auto-enrollment.
5133: # Only used for case where authentication method for new user is localauth
5134: #
5135: # Formal Parameters:
5136: # $cmd - The command request that got us dispatched.
5137: # $tail - The tail of the command. In this case this is a colon separated
5138: # set of words that will be split into:
5139: # $authparam - An authentication parameter (localauth parameter).
5140: # $cdom - The domain of the course from the institution's
5141: # point of view.
5142: # $client - The socket open on the client.
5143: # Returns:
5144: # 1 - continue processing.
5145: #
5146: sub create_auto_enroll_password_handler {
5147: my ($cmd, $tail, $client) = @_;
5148: my $userinput = "$cmd:$tail";
5149:
5150: my ($authparam, $cdom) = split(/:/, $userinput);
5151:
5152: my ($create_passwd,$authchk);
5153: ($authparam,
5154: $create_passwd,
5155: $authchk) = &localenroll::create_password($authparam,$cdom);
5156:
5157: &Reply($client, &escape($authparam.':'.$create_passwd.':'.$authchk)."\n",
5158: $userinput);
5159:
5160:
5161: return 1;
5162: }
5163: ®ister_handler("autocreatepassword", \&create_auto_enroll_password_handler,
5164: 0, 1, 0);
5165:
5166: # Retrieve and remove temporary files created by/during autoenrollment.
5167: #
5168: # Formal Parameters:
5169: # $cmd - The command that got us dispatched.
5170: # $tail - The tail of the command. In our case this is a colon
5171: # separated list that will be split into:
5172: # $filename - The name of the file to remove.
5173: # The filename is given as a path relative to
5174: # the LonCAPA temp file directory.
5175: # $client - Socket open on the client.
5176: #
5177: # Returns:
5178: # 1 - Continue processing.
5179: sub retrieve_auto_file_handler {
5180: my ($cmd, $tail, $client) = @_;
5181: my $userinput = "cmd:$tail";
5182:
5183: my ($filename) = split(/:/, $tail);
5184:
5185: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
5186: if ( (-e $source) && ($filename ne '') ) {
5187: my $reply = '';
5188: if (open(my $fh,$source)) {
5189: while (<$fh>) {
5190: chomp($_);
5191: $_ =~ s/^\s+//g;
5192: $_ =~ s/\s+$//g;
5193: $reply .= $_;
5194: }
5195: close($fh);
5196: &Reply($client, &escape($reply)."\n", $userinput);
5197:
5198: # Does this have to be uncommented??!? (RF).
5199: #
5200: # unlink($source);
5201: } else {
5202: &Failure($client, "error\n", $userinput);
5203: }
5204: } else {
5205: &Failure($client, "error\n", $userinput);
5206: }
5207:
5208:
5209: return 1;
5210: }
5211: ®ister_handler("autoretrieve", \&retrieve_auto_file_handler, 0,1,0);
5212:
5213: sub crsreq_checks_handler {
5214: my ($cmd, $tail, $client) = @_;
5215: my $userinput = "$cmd:$tail";
5216: my $dom = $tail;
5217: my $result;
5218: my @reqtypes = ('official','unofficial','community');
5219: eval {
5220: local($SIG{__DIE__})='DEFAULT';
5221: my %validations;
5222: my $response = &localenroll::crsreq_checks($dom,\@reqtypes,
5223: \%validations);
5224: if ($response eq 'ok') {
5225: foreach my $key (keys(%validations)) {
5226: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($validations{$key}).'&';
5227: }
5228: $result =~ s/\&$//;
5229: } else {
5230: $result = 'error';
5231: }
5232: };
5233: if (!$@) {
5234: &Reply($client, \$result, $userinput);
5235: } else {
5236: &Failure($client,"unknown_cmd\n",$userinput);
5237: }
5238: return 1;
5239: }
5240: ®ister_handler("autocrsreqchecks", \&crsreq_checks_handler, 0, 1, 0);
5241:
5242: sub validate_crsreq_handler {
5243: my ($cmd, $tail, $client) = @_;
5244: my $userinput = "$cmd:$tail";
5245: my ($dom,$owner,$crstype,$inststatuslist,$instcode,$instseclist) = split(/:/, $tail);
5246: $instcode = &unescape($instcode);
5247: $owner = &unescape($owner);
5248: $crstype = &unescape($crstype);
5249: $inststatuslist = &unescape($inststatuslist);
5250: $instcode = &unescape($instcode);
5251: $instseclist = &unescape($instseclist);
5252: my $outcome;
5253: eval {
5254: local($SIG{__DIE__})='DEFAULT';
5255: $outcome = &localenroll::validate_crsreq($dom,$owner,$crstype,
5256: $inststatuslist,$instcode,
5257: $instseclist);
5258: };
5259: if (!$@) {
5260: &Reply($client, \$outcome, $userinput);
5261: } else {
5262: &Failure($client,"unknown_cmd\n",$userinput);
5263: }
5264: return 1;
5265: }
5266: ®ister_handler("autocrsreqvalidation", \&validate_crsreq_handler, 0, 1, 0);
5267:
5268: #
5269: # Read and retrieve institutional code format (for support form).
5270: # Formal Parameters:
5271: # $cmd - Command that dispatched us.
5272: # $tail - Tail of the command. In this case it conatins
5273: # the course domain and the coursename.
5274: # $client - Socket open on the client.
5275: # Returns:
5276: # 1 - Continue processing.
5277: #
5278: sub get_institutional_code_format_handler {
5279: my ($cmd, $tail, $client) = @_;
5280: my $userinput = "$cmd:$tail";
5281:
5282: my $reply;
5283: my($cdom,$course) = split(/:/,$tail);
5284: my @pairs = split/\&/,$course;
5285: my %instcodes = ();
5286: my %codes = ();
5287: my @codetitles = ();
5288: my %cat_titles = ();
5289: my %cat_order = ();
5290: foreach (@pairs) {
5291: my ($key,$value) = split/=/,$_;
5292: $instcodes{&unescape($key)} = &unescape($value);
5293: }
5294: my $formatreply = &localenroll::instcode_format($cdom,
5295: \%instcodes,
5296: \%codes,
5297: \@codetitles,
5298: \%cat_titles,
5299: \%cat_order);
5300: if ($formatreply eq 'ok') {
5301: my $codes_str = &Apache::lonnet::hash2str(%codes);
5302: my $codetitles_str = &Apache::lonnet::array2str(@codetitles);
5303: my $cat_titles_str = &Apache::lonnet::hash2str(%cat_titles);
5304: my $cat_order_str = &Apache::lonnet::hash2str(%cat_order);
5305: &Reply($client,
5306: $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'
5307: .$cat_order_str."\n",
5308: $userinput);
5309: } else {
5310: # this else branch added by RF since if not ok, lonc will
5311: # hang waiting on reply until timeout.
5312: #
5313: &Reply($client, "format_error\n", $userinput);
5314: }
5315:
5316: return 1;
5317: }
5318: ®ister_handler("autoinstcodeformat",
5319: \&get_institutional_code_format_handler,0,1,0);
5320:
5321: sub get_institutional_defaults_handler {
5322: my ($cmd, $tail, $client) = @_;
5323: my $userinput = "$cmd:$tail";
5324:
5325: my $dom = $tail;
5326: my %defaults_hash;
5327: my @code_order;
5328: my $outcome;
5329: eval {
5330: local($SIG{__DIE__})='DEFAULT';
5331: $outcome = &localenroll::instcode_defaults($dom,\%defaults_hash,
5332: \@code_order);
5333: };
5334: if (!$@) {
5335: if ($outcome eq 'ok') {
5336: my $result='';
5337: while (my ($key,$value) = each(%defaults_hash)) {
5338: $result.=&escape($key).'='.&escape($value).'&';
5339: }
5340: $result .= 'code_order='.&escape(join('&',@code_order));
5341: &Reply($client,\$result,$userinput);
5342: } else {
5343: &Reply($client,"error\n", $userinput);
5344: }
5345: } else {
5346: &Failure($client,"unknown_cmd\n",$userinput);
5347: }
5348: }
5349: ®ister_handler("autoinstcodedefaults",
5350: \&get_institutional_defaults_handler,0,1,0);
5351:
5352: sub get_possible_instcodes_handler {
5353: my ($cmd, $tail, $client) = @_;
5354: my $userinput = "$cmd:$tail";
5355:
5356: my $reply;
5357: my $cdom = $tail;
5358: my (@codetitles,%cat_titles,%cat_order,@code_order);
5359: my $formatreply = &localenroll::possible_instcodes($cdom,
5360: \@codetitles,
5361: \%cat_titles,
5362: \%cat_order,
5363: \@code_order);
5364: if ($formatreply eq 'ok') {
5365: my $result = join('&',map {&escape($_);} (@codetitles)).':';
5366: $result .= join('&',map {&escape($_);} (@code_order)).':';
5367: foreach my $key (keys(%cat_titles)) {
5368: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($cat_titles{$key}).'&';
5369: }
5370: $result =~ s/\&$//;
5371: $result .= ':';
5372: foreach my $key (keys(%cat_order)) {
5373: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($cat_order{$key}).'&';
5374: }
5375: $result =~ s/\&$//;
5376: &Reply($client,\$result,$userinput);
5377: } else {
5378: &Reply($client, "format_error\n", $userinput);
5379: }
5380: return 1;
5381: }
5382: ®ister_handler("autopossibleinstcodes",
5383: \&get_possible_instcodes_handler,0,1,0);
5384:
5385: sub get_institutional_user_rules {
5386: my ($cmd, $tail, $client) = @_;
5387: my $userinput = "$cmd:$tail";
5388: my $dom = &unescape($tail);
5389: my (%rules_hash,@rules_order);
5390: my $outcome;
5391: eval {
5392: local($SIG{__DIE__})='DEFAULT';
5393: $outcome = &localenroll::username_rules($dom,\%rules_hash,\@rules_order);
5394: };
5395: if (!$@) {
5396: if ($outcome eq 'ok') {
5397: my $result;
5398: foreach my $key (keys(%rules_hash)) {
5399: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
5400: }
5401: $result =~ s/\&$//;
5402: $result .= ':';
5403: if (@rules_order > 0) {
5404: foreach my $item (@rules_order) {
5405: $result .= &escape($item).'&';
5406: }
5407: }
5408: $result =~ s/\&$//;
5409: &Reply($client,\$result,$userinput);
5410: } else {
5411: &Reply($client,"error\n", $userinput);
5412: }
5413: } else {
5414: &Failure($client,"unknown_cmd\n",$userinput);
5415: }
5416: }
5417: ®ister_handler("instuserrules",\&get_institutional_user_rules,0,1,0);
5418:
5419: sub get_institutional_id_rules {
5420: my ($cmd, $tail, $client) = @_;
5421: my $userinput = "$cmd:$tail";
5422: my $dom = &unescape($tail);
5423: my (%rules_hash,@rules_order);
5424: my $outcome;
5425: eval {
5426: local($SIG{__DIE__})='DEFAULT';
5427: $outcome = &localenroll::id_rules($dom,\%rules_hash,\@rules_order);
5428: };
5429: if (!$@) {
5430: if ($outcome eq 'ok') {
5431: my $result;
5432: foreach my $key (keys(%rules_hash)) {
5433: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
5434: }
5435: $result =~ s/\&$//;
5436: $result .= ':';
5437: if (@rules_order > 0) {
5438: foreach my $item (@rules_order) {
5439: $result .= &escape($item).'&';
5440: }
5441: }
5442: $result =~ s/\&$//;
5443: &Reply($client,\$result,$userinput);
5444: } else {
5445: &Reply($client,"error\n", $userinput);
5446: }
5447: } else {
5448: &Failure($client,"unknown_cmd\n",$userinput);
5449: }
5450: }
5451: ®ister_handler("instidrules",\&get_institutional_id_rules,0,1,0);
5452:
5453: sub get_institutional_selfcreate_rules {
5454: my ($cmd, $tail, $client) = @_;
5455: my $userinput = "$cmd:$tail";
5456: my $dom = &unescape($tail);
5457: my (%rules_hash,@rules_order);
5458: my $outcome;
5459: eval {
5460: local($SIG{__DIE__})='DEFAULT';
5461: $outcome = &localenroll::selfcreate_rules($dom,\%rules_hash,\@rules_order);
5462: };
5463: if (!$@) {
5464: if ($outcome eq 'ok') {
5465: my $result;
5466: foreach my $key (keys(%rules_hash)) {
5467: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
5468: }
5469: $result =~ s/\&$//;
5470: $result .= ':';
5471: if (@rules_order > 0) {
5472: foreach my $item (@rules_order) {
5473: $result .= &escape($item).'&';
5474: }
5475: }
5476: $result =~ s/\&$//;
5477: &Reply($client,\$result,$userinput);
5478: } else {
5479: &Reply($client,"error\n", $userinput);
5480: }
5481: } else {
5482: &Failure($client,"unknown_cmd\n",$userinput);
5483: }
5484: }
5485: ®ister_handler("instemailrules",\&get_institutional_selfcreate_rules,0,1,0);
5486:
5487:
5488: sub institutional_username_check {
5489: my ($cmd, $tail, $client) = @_;
5490: my $userinput = "$cmd:$tail";
5491: my %rulecheck;
5492: my $outcome;
5493: my ($udom,$uname,@rules) = split(/:/,$tail);
5494: $udom = &unescape($udom);
5495: $uname = &unescape($uname);
5496: @rules = map {&unescape($_);} (@rules);
5497: eval {
5498: local($SIG{__DIE__})='DEFAULT';
5499: $outcome = &localenroll::username_check($udom,$uname,\@rules,\%rulecheck);
5500: };
5501: if (!$@) {
5502: if ($outcome eq 'ok') {
5503: my $result='';
5504: foreach my $key (keys(%rulecheck)) {
5505: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
5506: }
5507: &Reply($client,\$result,$userinput);
5508: } else {
5509: &Reply($client,"error\n", $userinput);
5510: }
5511: } else {
5512: &Failure($client,"unknown_cmd\n",$userinput);
5513: }
5514: }
5515: ®ister_handler("instrulecheck",\&institutional_username_check,0,1,0);
5516:
5517: sub institutional_id_check {
5518: my ($cmd, $tail, $client) = @_;
5519: my $userinput = "$cmd:$tail";
5520: my %rulecheck;
5521: my $outcome;
5522: my ($udom,$id,@rules) = split(/:/,$tail);
5523: $udom = &unescape($udom);
5524: $id = &unescape($id);
5525: @rules = map {&unescape($_);} (@rules);
5526: eval {
5527: local($SIG{__DIE__})='DEFAULT';
5528: $outcome = &localenroll::id_check($udom,$id,\@rules,\%rulecheck);
5529: };
5530: if (!$@) {
5531: if ($outcome eq 'ok') {
5532: my $result='';
5533: foreach my $key (keys(%rulecheck)) {
5534: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
5535: }
5536: &Reply($client,\$result,$userinput);
5537: } else {
5538: &Reply($client,"error\n", $userinput);
5539: }
5540: } else {
5541: &Failure($client,"unknown_cmd\n",$userinput);
5542: }
5543: }
5544: ®ister_handler("instidrulecheck",\&institutional_id_check,0,1,0);
5545:
5546: sub institutional_selfcreate_check {
5547: my ($cmd, $tail, $client) = @_;
5548: my $userinput = "$cmd:$tail";
5549: my %rulecheck;
5550: my $outcome;
5551: my ($udom,$email,@rules) = split(/:/,$tail);
5552: $udom = &unescape($udom);
5553: $email = &unescape($email);
5554: @rules = map {&unescape($_);} (@rules);
5555: eval {
5556: local($SIG{__DIE__})='DEFAULT';
5557: $outcome = &localenroll::selfcreate_check($udom,$email,\@rules,\%rulecheck);
5558: };
5559: if (!$@) {
5560: if ($outcome eq 'ok') {
5561: my $result='';
5562: foreach my $key (keys(%rulecheck)) {
5563: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
5564: }
5565: &Reply($client,\$result,$userinput);
5566: } else {
5567: &Reply($client,"error\n", $userinput);
5568: }
5569: } else {
5570: &Failure($client,"unknown_cmd\n",$userinput);
5571: }
5572: }
5573: ®ister_handler("instselfcreatecheck",\&institutional_selfcreate_check,0,1,0);
5574:
5575: # Get domain specific conditions for import of student photographs to a course
5576: #
5577: # Retrieves information from photo_permission subroutine in localenroll.
5578: # Returns outcome (ok) if no processing errors, and whether course owner is
5579: # required to accept conditions of use (yes/no).
5580: #
5581: #
5582: sub photo_permission_handler {
5583: my ($cmd, $tail, $client) = @_;
5584: my $userinput = "$cmd:$tail";
5585: my $cdom = $tail;
5586: my ($perm_reqd,$conditions);
5587: my $outcome;
5588: eval {
5589: local($SIG{__DIE__})='DEFAULT';
5590: $outcome = &localenroll::photo_permission($cdom,\$perm_reqd,
5591: \$conditions);
5592: };
5593: if (!$@) {
5594: &Reply($client, &escape($outcome.':'.$perm_reqd.':'. $conditions)."\n",
5595: $userinput);
5596: } else {
5597: &Failure($client,"unknown_cmd\n",$userinput);
5598: }
5599: return 1;
5600: }
5601: ®ister_handler("autophotopermission",\&photo_permission_handler,0,1,0);
5602:
5603: #
5604: # Checks if student photo is available for a user in the domain, in the user's
5605: # directory (in /userfiles/internal/studentphoto.jpg).
5606: # Uses localstudentphoto:fetch() to ensure there is an up to date copy of
5607: # the student's photo.
5608:
5609: sub photo_check_handler {
5610: my ($cmd, $tail, $client) = @_;
5611: my $userinput = "$cmd:$tail";
5612: my ($udom,$uname,$pid) = split(/:/,$tail);
5613: $udom = &unescape($udom);
5614: $uname = &unescape($uname);
5615: $pid = &unescape($pid);
5616: my $path=&propath($udom,$uname).'/userfiles/internal/';
5617: if (!-e $path) {
5618: &mkpath($path);
5619: }
5620: my $response;
5621: my $result = &localstudentphoto::fetch($udom,$uname,$pid,\$response);
5622: $result .= ':'.$response;
5623: &Reply($client, &escape($result)."\n",$userinput);
5624: return 1;
5625: }
5626: ®ister_handler("autophotocheck",\&photo_check_handler,0,1,0);
5627:
5628: #
5629: # Retrieve information from localenroll about whether to provide a button
5630: # for users who have enbled import of student photos to initiate an
5631: # update of photo files for registered students. Also include
5632: # comment to display alongside button.
5633:
5634: sub photo_choice_handler {
5635: my ($cmd, $tail, $client) = @_;
5636: my $userinput = "$cmd:$tail";
5637: my $cdom = &unescape($tail);
5638: my ($update,$comment);
5639: eval {
5640: local($SIG{__DIE__})='DEFAULT';
5641: ($update,$comment) = &localenroll::manager_photo_update($cdom);
5642: };
5643: if (!$@) {
5644: &Reply($client,&escape($update).':'.&escape($comment)."\n",$userinput);
5645: } else {
5646: &Failure($client,"unknown_cmd\n",$userinput);
5647: }
5648: return 1;
5649: }
5650: ®ister_handler("autophotochoice",\&photo_choice_handler,0,1,0);
5651:
5652: #
5653: # Gets a student's photo to exist (in the correct image type) in the user's
5654: # directory.
5655: # Formal Parameters:
5656: # $cmd - The command request that got us dispatched.
5657: # $tail - A colon separated set of words that will be split into:
5658: # $domain - student's domain
5659: # $uname - student username
5660: # $type - image type desired
5661: # $client - The socket open on the client.
5662: # Returns:
5663: # 1 - continue processing.
5664:
5665: sub student_photo_handler {
5666: my ($cmd, $tail, $client) = @_;
5667: my ($domain,$uname,$ext,$type) = split(/:/, $tail);
5668:
5669: my $path=&propath($domain,$uname). '/userfiles/internal/';
5670: my $filename = 'studentphoto.'.$ext;
5671: if ($type eq 'thumbnail') {
5672: $filename = 'studentphoto_tn.'.$ext;
5673: }
5674: if (-e $path.$filename) {
5675: &Reply($client,"ok\n","$cmd:$tail");
5676: return 1;
5677: }
5678: &mkpath($path);
5679: my $file;
5680: if ($type eq 'thumbnail') {
5681: eval {
5682: local($SIG{__DIE__})='DEFAULT';
5683: $file=&localstudentphoto::fetch_thumbnail($domain,$uname);
5684: };
5685: } else {
5686: $file=&localstudentphoto::fetch($domain,$uname);
5687: }
5688: if (!$file) {
5689: &Failure($client,"unavailable\n","$cmd:$tail");
5690: return 1;
5691: }
5692: if (!-e $path.$filename) { &convert_photo($file,$path.$filename); }
5693: if (-e $path.$filename) {
5694: &Reply($client,"ok\n","$cmd:$tail");
5695: return 1;
5696: }
5697: &Failure($client,"unable_to_convert\n","$cmd:$tail");
5698: return 1;
5699: }
5700: ®ister_handler("studentphoto", \&student_photo_handler, 0, 1, 0);
5701:
5702: sub inst_usertypes_handler {
5703: my ($cmd, $domain, $client) = @_;
5704: my $res;
5705: my $userinput = $cmd.":".$domain; # For logging purposes.
5706: my (%typeshash,@order,$result);
5707: eval {
5708: local($SIG{__DIE__})='DEFAULT';
5709: $result=&localenroll::inst_usertypes($domain,\%typeshash,\@order);
5710: };
5711: if ($result eq 'ok') {
5712: if (keys(%typeshash) > 0) {
5713: foreach my $key (keys(%typeshash)) {
5714: $res.=&escape($key).'='.&escape($typeshash{$key}).'&';
5715: }
5716: }
5717: $res=~s/\&$//;
5718: $res .= ':';
5719: if (@order > 0) {
5720: foreach my $item (@order) {
5721: $res .= &escape($item).'&';
5722: }
5723: }
5724: $res=~s/\&$//;
5725: }
5726: &Reply($client, \$res, $userinput);
5727: return 1;
5728: }
5729: ®ister_handler("inst_usertypes", \&inst_usertypes_handler, 0, 1, 0);
5730:
5731: # mkpath makes all directories for a file, expects an absolute path with a
5732: # file or a trailing / if just a dir is passed
5733: # returns 1 on success 0 on failure
5734: sub mkpath {
5735: my ($file)=@_;
5736: my @parts=split(/\//,$file,-1);
5737: my $now=$parts[0].'/'.$parts[1].'/'.$parts[2];
5738: for (my $i=3;$i<= ($#parts-1);$i++) {
5739: $now.='/'.$parts[$i];
5740: if (!-e $now) {
5741: if (!mkdir($now,0770)) { return 0; }
5742: }
5743: }
5744: return 1;
5745: }
5746:
5747: #---------------------------------------------------------------
5748: #
5749: # Getting, decoding and dispatching requests:
5750: #
5751: #
5752: # Get a Request:
5753: # Gets a Request message from the client. The transaction
5754: # is defined as a 'line' of text. We remove the new line
5755: # from the text line.
5756: #
5757: sub get_request {
5758: my $input = <$client>;
5759: chomp($input);
5760:
5761: &Debug("get_request: Request = $input\n");
5762:
5763: &status('Processing '.$clientname.':'.$input);
5764:
5765: return $input;
5766: }
5767: #---------------------------------------------------------------
5768: #
5769: # Process a request. This sub should shrink as each action
5770: # gets farmed out into a separat sub that is registered
5771: # with the dispatch hash.
5772: #
5773: # Parameters:
5774: # user_input - The request received from the client (lonc).
5775: # Returns:
5776: # true to keep processing, false if caller should exit.
5777: #
5778: sub process_request {
5779: my ($userinput) = @_; # Easier for now to break style than to
5780: # fix all the userinput -> user_input.
5781: my $wasenc = 0; # True if request was encrypted.
5782: # ------------------------------------------------------------ See if encrypted
5783: # for command
5784: # sethost:<server>
5785: # <command>:<args>
5786: # we just send it to the processor
5787: # for
5788: # sethost:<server>:<command>:<args>
5789: # we do the implict set host and then do the command
5790: if ($userinput =~ /^sethost:/) {
5791: (my $cmd,my $newid,$userinput) = split(':',$userinput,3);
5792: if (defined($userinput)) {
5793: &sethost("$cmd:$newid");
5794: } else {
5795: $userinput = "$cmd:$newid";
5796: }
5797: }
5798:
5799: if ($userinput =~ /^enc/) {
5800: $userinput = decipher($userinput);
5801: $wasenc=1;
5802: if(!$userinput) { # Cipher not defined.
5803: &Failure($client, "error: Encrypted data without negotated key\n");
5804: return 0;
5805: }
5806: }
5807: Debug("process_request: $userinput\n");
5808:
5809: #
5810: # The 'correct way' to add a command to lond is now to
5811: # write a sub to execute it and Add it to the command dispatch
5812: # hash via a call to register_handler.. The comments to that
5813: # sub should give you enough to go on to show how to do this
5814: # along with the examples that are building up as this code
5815: # is getting refactored. Until all branches of the
5816: # if/elseif monster below have been factored out into
5817: # separate procesor subs, if the dispatch hash is missing
5818: # the command keyword, we will fall through to the remainder
5819: # of the if/else chain below in order to keep this thing in
5820: # working order throughout the transmogrification.
5821:
5822: my ($command, $tail) = split(/:/, $userinput, 2);
5823: chomp($command);
5824: chomp($tail);
5825: $tail =~ s/(\r)//; # This helps people debugging with e.g. telnet.
5826: $command =~ s/(\r)//; # And this too for parameterless commands.
5827: if(!$tail) {
5828: $tail =""; # defined but blank.
5829: }
5830:
5831: &Debug("Command received: $command, encoded = $wasenc");
5832:
5833: if(defined $Dispatcher{$command}) {
5834:
5835: my $dispatch_info = $Dispatcher{$command};
5836: my $handler = $$dispatch_info[0];
5837: my $need_encode = $$dispatch_info[1];
5838: my $client_types = $$dispatch_info[2];
5839: Debug("Matched dispatch hash: mustencode: $need_encode "
5840: ."ClientType $client_types");
5841:
5842: # Validate the request:
5843:
5844: my $ok = 1;
5845: my $requesterprivs = 0;
5846: if(&isClient()) {
5847: $requesterprivs |= $CLIENT_OK;
5848: }
5849: if(&isManager()) {
5850: $requesterprivs |= $MANAGER_OK;
5851: }
5852: if($need_encode && (!$wasenc)) {
5853: Debug("Must encode but wasn't: $need_encode $wasenc");
5854: $ok = 0;
5855: }
5856: if(($client_types & $requesterprivs) == 0) {
5857: Debug("Client not privileged to do this operation");
5858: $ok = 0;
5859: }
5860:
5861: if($ok) {
5862: Debug("Dispatching to handler $command $tail");
5863: my $keep_going = &$handler($command, $tail, $client);
5864: return $keep_going;
5865: } else {
5866: Debug("Refusing to dispatch because client did not match requirements");
5867: Failure($client, "refused\n", $userinput);
5868: return 1;
5869: }
5870:
5871: }
5872:
5873: print $client "unknown_cmd\n";
5874: # -------------------------------------------------------------------- complete
5875: Debug("process_request - returning 1");
5876: return 1;
5877: }
5878: #
5879: # Decipher encoded traffic
5880: # Parameters:
5881: # input - Encoded data.
5882: # Returns:
5883: # Decoded data or undef if encryption key was not yet negotiated.
5884: # Implicit input:
5885: # cipher - This global holds the negotiated encryption key.
5886: #
5887: sub decipher {
5888: my ($input) = @_;
5889: my $output = '';
5890:
5891:
5892: if($cipher) {
5893: my($enc, $enclength, $encinput) = split(/:/, $input);
5894: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
5895: $output .=
5896: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
5897: }
5898: return substr($output, 0, $enclength);
5899: } else {
5900: return undef;
5901: }
5902: }
5903:
5904: #
5905: # Register a command processor. This function is invoked to register a sub
5906: # to process a request. Once registered, the ProcessRequest sub can automatically
5907: # dispatch requests to an appropriate sub, and do the top level validity checking
5908: # as well:
5909: # - Is the keyword recognized.
5910: # - Is the proper client type attempting the request.
5911: # - Is the request encrypted if it has to be.
5912: # Parameters:
5913: # $request_name - Name of the request being registered.
5914: # This is the command request that will match
5915: # against the hash keywords to lookup the information
5916: # associated with the dispatch information.
5917: # $procedure - Reference to a sub to call to process the request.
5918: # All subs get called as follows:
5919: # Procedure($cmd, $tail, $replyfd, $key)
5920: # $cmd - the actual keyword that invoked us.
5921: # $tail - the tail of the request that invoked us.
5922: # $replyfd- File descriptor connected to the client
5923: # $must_encode - True if the request must be encoded to be good.
5924: # $client_ok - True if it's ok for a client to request this.
5925: # $manager_ok - True if it's ok for a manager to request this.
5926: # Side effects:
5927: # - On success, the Dispatcher hash has an entry added for the key $RequestName
5928: # - On failure, the program will die as it's a bad internal bug to try to
5929: # register a duplicate command handler.
5930: #
5931: sub register_handler {
5932: my ($request_name,$procedure,$must_encode, $client_ok,$manager_ok) = @_;
5933:
5934: # Don't allow duplication#
5935:
5936: if (defined $Dispatcher{$request_name}) {
5937: die "Attempting to define a duplicate request handler for $request_name\n";
5938: }
5939: # Build the client type mask:
5940:
5941: my $client_type_mask = 0;
5942: if($client_ok) {
5943: $client_type_mask |= $CLIENT_OK;
5944: }
5945: if($manager_ok) {
5946: $client_type_mask |= $MANAGER_OK;
5947: }
5948:
5949: # Enter the hash:
5950:
5951: my @entry = ($procedure, $must_encode, $client_type_mask);
5952:
5953: $Dispatcher{$request_name} = \@entry;
5954:
5955: }
5956:
5957:
5958: #------------------------------------------------------------------
5959:
5960:
5961:
5962:
5963: #
5964: # Convert an error return code from lcpasswd to a string value.
5965: #
5966: sub lcpasswdstrerror {
5967: my $ErrorCode = shift;
5968: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
5969: return "lcpasswd Unrecognized error return value ".$ErrorCode;
5970: } else {
5971: return $passwderrors[$ErrorCode];
5972: }
5973: }
5974:
5975: #
5976: # Convert an error return code from lcuseradd to a string value:
5977: #
5978: sub lcuseraddstrerror {
5979: my $ErrorCode = shift;
5980: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
5981: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
5982: } else {
5983: return $adderrors[$ErrorCode];
5984: }
5985: }
5986:
5987: # grabs exception and records it to log before exiting
5988: sub catchexception {
5989: my ($error)=@_;
5990: $SIG{'QUIT'}='DEFAULT';
5991: $SIG{__DIE__}='DEFAULT';
5992: &status("Catching exception");
5993: &logthis("<font color='red'>CRITICAL: "
5994: ."ABNORMAL EXIT. Child $$ for server ".$perlvar{'lonHostID'}." died through "
5995: ."a crash with this error msg->[$error]</font>");
5996: &logthis('Famous last words: '.$status.' - '.$lastlog);
5997: if ($client) { print $client "error: $error\n"; }
5998: $server->close();
5999: die($error);
6000: }
6001: sub timeout {
6002: &status("Handling Timeout");
6003: &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
6004: &catchexception('Timeout');
6005: }
6006: # -------------------------------- Set signal handlers to record abnormal exits
6007:
6008:
6009: $SIG{'QUIT'}=\&catchexception;
6010: $SIG{__DIE__}=\&catchexception;
6011:
6012: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
6013: &status("Read loncapa.conf and loncapa_apache.conf");
6014: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
6015: %perlvar=%{$perlvarref};
6016: undef $perlvarref;
6017:
6018: # ----------------------------- Make sure this process is running from user=www
6019: my $wwwid=getpwnam('www');
6020: if ($wwwid!=$<) {
6021: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
6022: my $subj="LON: $currenthostid User ID mismatch";
6023: system("echo 'User ID mismatch. lond must be run as user www.' |\
6024: mailto $emailto -s '$subj' > /dev/null");
6025: exit 1;
6026: }
6027:
6028: # --------------------------------------------- Check if other instance running
6029:
6030: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
6031:
6032: if (-e $pidfile) {
6033: my $lfh=IO::File->new("$pidfile");
6034: my $pide=<$lfh>;
6035: chomp($pide);
6036: if (kill 0 => $pide) { die "already running"; }
6037: }
6038:
6039: # ------------------------------------------------------------- Read hosts file
6040:
6041:
6042:
6043: # establish SERVER socket, bind and listen.
6044: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
6045: Type => SOCK_STREAM,
6046: Proto => 'tcp',
6047: ReuseAddr => 1,
6048: Listen => 10 )
6049: or die "making socket: $@\n";
6050:
6051: # --------------------------------------------------------- Do global variables
6052:
6053: # global variables
6054:
6055: my %children = (); # keys are current child process IDs
6056:
6057: sub REAPER { # takes care of dead children
6058: $SIG{CHLD} = \&REAPER;
6059: &status("Handling child death");
6060: my $pid;
6061: do {
6062: $pid = waitpid(-1,&WNOHANG());
6063: if (defined($children{$pid})) {
6064: &logthis("Child $pid died");
6065: delete($children{$pid});
6066: } elsif ($pid > 0) {
6067: &logthis("Unknown Child $pid died");
6068: }
6069: } while ( $pid > 0 );
6070: foreach my $child (keys(%children)) {
6071: $pid = waitpid($child,&WNOHANG());
6072: if ($pid > 0) {
6073: &logthis("Child $child - $pid looks like we missed it's death");
6074: delete($children{$pid});
6075: }
6076: }
6077: &status("Finished Handling child death");
6078: }
6079:
6080: sub HUNTSMAN { # signal handler for SIGINT
6081: &status("Killing children (INT)");
6082: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
6083: kill 'INT' => keys %children;
6084: &logthis("Free socket: ".shutdown($server,2)); # free up socket
6085: my $execdir=$perlvar{'lonDaemons'};
6086: unlink("$execdir/logs/lond.pid");
6087: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
6088: &status("Done killing children");
6089: exit; # clean up with dignity
6090: }
6091:
6092: sub HUPSMAN { # signal handler for SIGHUP
6093: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
6094: &status("Killing children for restart (HUP)");
6095: kill 'INT' => keys %children;
6096: &logthis("Free socket: ".shutdown($server,2)); # free up socket
6097: &logthis("<font color='red'>CRITICAL: Restarting</font>");
6098: my $execdir=$perlvar{'lonDaemons'};
6099: unlink("$execdir/logs/lond.pid");
6100: &status("Restarting self (HUP)");
6101: exec("$execdir/lond"); # here we go again
6102: }
6103:
6104: #
6105: # Reload the Apache daemon's state.
6106: # This is done by invoking /home/httpd/perl/apachereload
6107: # a setuid perl script that can be root for us to do this job.
6108: #
6109: sub ReloadApache {
6110: # --------------------------- Handle case of another apachereload process (locking)
6111: if (&LONCAPA::try_to_lock('/tmp/lock_apachereload')) {
6112: my $execdir = $perlvar{'lonDaemons'};
6113: my $script = $execdir."/apachereload";
6114: system($script);
6115: unlink('/tmp/lock_apachereload'); # Remove the lock file.
6116: }
6117: }
6118:
6119: #
6120: # Called in response to a USR2 signal.
6121: # - Reread hosts.tab
6122: # - All children connected to hosts that were removed from hosts.tab
6123: # are killed via SIGINT
6124: # - All children connected to previously existing hosts are sent SIGUSR1
6125: # - Our internal hosts hash is updated to reflect the new contents of
6126: # hosts.tab causing connections from hosts added to hosts.tab to
6127: # now be honored.
6128: #
6129: sub UpdateHosts {
6130: &status("Reload hosts.tab");
6131: logthis('<font color="blue"> Updating connections </font>');
6132: #
6133: # The %children hash has the set of IP's we currently have children
6134: # on. These need to be matched against records in the hosts.tab
6135: # Any ip's no longer in the table get killed off they correspond to
6136: # either dropped or changed hosts. Note that the re-read of the table
6137: # will take care of new and changed hosts as connections come into being.
6138:
6139: &Apache::lonnet::reset_hosts_info();
6140:
6141: foreach my $child (keys(%children)) {
6142: my $childip = $children{$child};
6143: if ($childip ne '127.0.0.1'
6144: && !defined(&Apache::lonnet::get_hosts_from_ip($childip))) {
6145: logthis('<font color="blue"> UpdateHosts killing child '
6146: ." $child for ip $childip </font>");
6147: kill('INT', $child);
6148: } else {
6149: logthis('<font color="green"> keeping child for ip '
6150: ." $childip (pid=$child) </font>");
6151: }
6152: }
6153: ReloadApache;
6154: &status("Finished reloading hosts.tab");
6155: }
6156:
6157:
6158: sub checkchildren {
6159: &status("Checking on the children (sending signals)");
6160: &initnewstatus();
6161: &logstatus();
6162: &logthis('Going to check on the children');
6163: my $docdir=$perlvar{'lonDocRoot'};
6164: foreach (sort keys %children) {
6165: #sleep 1;
6166: unless (kill 'USR1' => $_) {
6167: &logthis ('Child '.$_.' is dead');
6168: &logstatus($$.' is dead');
6169: delete($children{$_});
6170: }
6171: }
6172: sleep 5;
6173: $SIG{ALRM} = sub { Debug("timeout");
6174: die "timeout"; };
6175: $SIG{__DIE__} = 'DEFAULT';
6176: &status("Checking on the children (waiting for reports)");
6177: foreach (sort keys %children) {
6178: unless (-e "$docdir/lon-status/londchld/$_.txt") {
6179: eval {
6180: alarm(300);
6181: &logthis('Child '.$_.' did not respond');
6182: kill 9 => $_;
6183: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
6184: #$subj="LON: $currenthostid killed lond process $_";
6185: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
6186: #$execdir=$perlvar{'lonDaemons'};
6187: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
6188: delete($children{$_});
6189: alarm(0);
6190: }
6191: }
6192: }
6193: $SIG{ALRM} = 'DEFAULT';
6194: $SIG{__DIE__} = \&catchexception;
6195: &status("Finished checking children");
6196: &logthis('Finished Checking children');
6197: }
6198:
6199: # --------------------------------------------------------------------- Logging
6200:
6201: sub logthis {
6202: my $message=shift;
6203: my $execdir=$perlvar{'lonDaemons'};
6204: my $fh=IO::File->new(">>$execdir/logs/lond.log");
6205: my $now=time;
6206: my $local=localtime($now);
6207: $lastlog=$local.': '.$message;
6208: print $fh "$local ($$): $message\n";
6209: }
6210:
6211: # ------------------------- Conditional log if $DEBUG true.
6212: sub Debug {
6213: my $message = shift;
6214: if($DEBUG) {
6215: &logthis($message);
6216: }
6217: }
6218:
6219: #
6220: # Sub to do replies to client.. this gives a hook for some
6221: # debug tracing too:
6222: # Parameters:
6223: # fd - File open on client.
6224: # reply - Text to send to client.
6225: # request - Original request from client.
6226: #
6227: sub Reply {
6228: my ($fd, $reply, $request) = @_;
6229: if (ref($reply)) {
6230: print $fd $$reply;
6231: print $fd "\n";
6232: if ($DEBUG) { Debug("Request was $request Reply was $$reply"); }
6233: } else {
6234: print $fd $reply;
6235: if ($DEBUG) { Debug("Request was $request Reply was $reply"); }
6236: }
6237: $Transactions++;
6238: }
6239:
6240:
6241: #
6242: # Sub to report a failure.
6243: # This function:
6244: # - Increments the failure statistic counters.
6245: # - Invokes Reply to send the error message to the client.
6246: # Parameters:
6247: # fd - File descriptor open on the client
6248: # reply - Reply text to emit.
6249: # request - The original request message (used by Reply
6250: # to debug if that's enabled.
6251: # Implicit outputs:
6252: # $Failures- The number of failures is incremented.
6253: # Reply (invoked here) sends a message to the
6254: # client:
6255: #
6256: sub Failure {
6257: my $fd = shift;
6258: my $reply = shift;
6259: my $request = shift;
6260:
6261: $Failures++;
6262: Reply($fd, $reply, $request); # That's simple eh?
6263: }
6264: # ------------------------------------------------------------------ Log status
6265:
6266: sub logstatus {
6267: &status("Doing logging");
6268: my $docdir=$perlvar{'lonDocRoot'};
6269: {
6270: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
6271: print $fh $status."\n".$lastlog."\n".time."\n$keymode";
6272: $fh->close();
6273: }
6274: &status("Finished $$.txt");
6275: {
6276: open(LOG,">>$docdir/lon-status/londstatus.txt");
6277: flock(LOG,LOCK_EX);
6278: print LOG $$."\t".$clientname."\t".$currenthostid."\t"
6279: .$status."\t".$lastlog."\t $keymode\n";
6280: flock(LOG,LOCK_UN);
6281: close(LOG);
6282: }
6283: &status("Finished logging");
6284: }
6285:
6286: sub initnewstatus {
6287: my $docdir=$perlvar{'lonDocRoot'};
6288: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
6289: my $now=time();
6290: my $local=localtime($now);
6291: print $fh "LOND status $local - parent $$\n\n";
6292: opendir(DIR,"$docdir/lon-status/londchld");
6293: while (my $filename=readdir(DIR)) {
6294: unlink("$docdir/lon-status/londchld/$filename");
6295: }
6296: closedir(DIR);
6297: }
6298:
6299: # -------------------------------------------------------------- Status setting
6300:
6301: sub status {
6302: my $what=shift;
6303: my $now=time;
6304: my $local=localtime($now);
6305: $status=$local.': '.$what;
6306: $0='lond: '.$what.' '.$local;
6307: }
6308:
6309: # -------------------------------------------------------------- Talk to lonsql
6310:
6311: sub sql_reply {
6312: my ($cmd)=@_;
6313: my $answer=&sub_sql_reply($cmd);
6314: if ($answer eq 'con_lost') { $answer=&sub_sql_reply($cmd); }
6315: return $answer;
6316: }
6317:
6318: sub sub_sql_reply {
6319: my ($cmd)=@_;
6320: my $unixsock="mysqlsock";
6321: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
6322: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
6323: Type => SOCK_STREAM,
6324: Timeout => 10)
6325: or return "con_lost";
6326: print $sclient "$cmd:$currentdomainid\n";
6327: my $answer=<$sclient>;
6328: chomp($answer);
6329: if (!$answer) { $answer="con_lost"; }
6330: return $answer;
6331: }
6332:
6333: # --------------------------------------- Is this the home server of an author?
6334:
6335: sub ishome {
6336: my $author=shift;
6337: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
6338: my ($udom,$uname)=split(/\//,$author);
6339: my $proname=propath($udom,$uname);
6340: if (-e $proname) {
6341: return 'owner';
6342: } else {
6343: return 'not_owner';
6344: }
6345: }
6346:
6347: # ======================================================= Continue main program
6348: # ---------------------------------------------------- Fork once and dissociate
6349:
6350: my $fpid=fork;
6351: exit if $fpid;
6352: die "Couldn't fork: $!" unless defined ($fpid);
6353:
6354: POSIX::setsid() or die "Can't start new session: $!";
6355:
6356: # ------------------------------------------------------- Write our PID on disk
6357:
6358: my $execdir=$perlvar{'lonDaemons'};
6359: open (PIDSAVE,">$execdir/logs/lond.pid");
6360: print PIDSAVE "$$\n";
6361: close(PIDSAVE);
6362: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
6363: &status('Starting');
6364:
6365:
6366:
6367: # ----------------------------------------------------- Install signal handlers
6368:
6369:
6370: $SIG{CHLD} = \&REAPER;
6371: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
6372: $SIG{HUP} = \&HUPSMAN;
6373: $SIG{USR1} = \&checkchildren;
6374: $SIG{USR2} = \&UpdateHosts;
6375:
6376: # Read the host hashes:
6377: &Apache::lonnet::load_hosts_tab();
6378: my %iphost = &Apache::lonnet::get_iphost(1);
6379:
6380: $dist=`$perlvar{'lonDaemons'}/distprobe`;
6381:
6382: my $arch = `uname -i`;
6383: chomp($arch);
6384: if ($arch eq 'unknown') {
6385: $arch = `uname -m`;
6386: chomp($arch);
6387: }
6388:
6389: # --------------------------------------------------------------
6390: # Accept connections. When a connection comes in, it is validated
6391: # and if good, a child process is created to process transactions
6392: # along the connection.
6393:
6394: while (1) {
6395: &status('Starting accept');
6396: $client = $server->accept() or next;
6397: &status('Accepted '.$client.' off to spawn');
6398: make_new_child($client);
6399: &status('Finished spawning');
6400: }
6401:
6402: sub make_new_child {
6403: my $pid;
6404: # my $cipher; # Now global
6405: my $sigset;
6406:
6407: $client = shift;
6408: &status('Starting new child '.$client);
6409: &logthis('<font color="green"> Attempting to start child ('.$client.
6410: ")</font>");
6411: # block signal for fork
6412: $sigset = POSIX::SigSet->new(SIGINT);
6413: sigprocmask(SIG_BLOCK, $sigset)
6414: or die "Can't block SIGINT for fork: $!\n";
6415:
6416: die "fork: $!" unless defined ($pid = fork);
6417:
6418: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
6419: # connection liveness.
6420:
6421: #
6422: # Figure out who we're talking to so we can record the peer in
6423: # the pid hash.
6424: #
6425: my $caller = getpeername($client);
6426: my ($port,$iaddr);
6427: if (defined($caller) && length($caller) > 0) {
6428: ($port,$iaddr)=unpack_sockaddr_in($caller);
6429: } else {
6430: &logthis("Unable to determine who caller was, getpeername returned nothing");
6431: }
6432: if (defined($iaddr)) {
6433: $clientip = inet_ntoa($iaddr);
6434: Debug("Connected with $clientip");
6435: } else {
6436: &logthis("Unable to determine clientip");
6437: $clientip='Unavailable';
6438: }
6439:
6440: if ($pid) {
6441: # Parent records the child's birth and returns.
6442: sigprocmask(SIG_UNBLOCK, $sigset)
6443: or die "Can't unblock SIGINT for fork: $!\n";
6444: $children{$pid} = $clientip;
6445: &status('Started child '.$pid);
6446: close($client);
6447: return;
6448: } else {
6449: # Child can *not* return from this subroutine.
6450: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
6451: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
6452: #don't get intercepted
6453: $SIG{USR1}= \&logstatus;
6454: $SIG{ALRM}= \&timeout;
6455: #
6456: # Block sigpipe as it gets thrownon socket disconnect and we want to
6457: # deal with that as a read faiure instead.
6458: #
6459: my $blockset = POSIX::SigSet->new(SIGPIPE);
6460: sigprocmask(SIG_BLOCK, $blockset);
6461:
6462: $lastlog='Forked ';
6463: $status='Forked';
6464:
6465: # unblock signals
6466: sigprocmask(SIG_UNBLOCK, $sigset)
6467: or die "Can't unblock SIGINT for fork: $!\n";
6468:
6469: # my $tmpsnum=0; # Now global
6470: #---------------------------------------------------- kerberos 5 initialization
6471: &Authen::Krb5::init_context();
6472: unless (($dist eq 'fedora5') || ($dist eq 'fedora4') ||
6473: ($dist eq 'fedora6') || ($dist eq 'suse9.3') ||
6474: ($dist eq 'suse12.2') || ($dist eq 'suse12.3')) {
6475: &Authen::Krb5::init_ets();
6476: }
6477:
6478: &status('Accepted connection');
6479: # =============================================================================
6480: # do something with the connection
6481: # -----------------------------------------------------------------------------
6482: # see if we know client and 'check' for spoof IP by ineffective challenge
6483:
6484: my $outsideip=$clientip;
6485: if ($clientip eq '127.0.0.1') {
6486: $outsideip=&Apache::lonnet::get_host_ip($perlvar{'lonHostID'});
6487: }
6488: &ReadManagerTable();
6489: my $clientrec=defined(&Apache::lonnet::get_hosts_from_ip($outsideip));
6490: my $ismanager=($managers{$outsideip} ne undef);
6491: $clientname = "[unknown]";
6492: if($clientrec) { # Establish client type.
6493: $ConnectionType = "client";
6494: $clientname = (&Apache::lonnet::get_hosts_from_ip($outsideip))[-1];
6495: if($ismanager) {
6496: $ConnectionType = "both";
6497: }
6498: } else {
6499: $ConnectionType = "manager";
6500: $clientname = $managers{$outsideip};
6501: }
6502: my $clientok;
6503:
6504: if ($clientrec || $ismanager) {
6505: &status("Waiting for init from $clientip $clientname");
6506: &logthis('<font color="yellow">INFO: Connection, '.
6507: $clientip.
6508: " ($clientname) connection type = $ConnectionType </font>" );
6509: &status("Connecting $clientip ($clientname))");
6510: my $remotereq=<$client>;
6511: chomp($remotereq);
6512: Debug("Got init: $remotereq");
6513:
6514: if ($remotereq =~ /^init/) {
6515: &sethost("sethost:$perlvar{'lonHostID'}");
6516: #
6517: # If the remote is attempting a local init... give that a try:
6518: #
6519: (my $i, my $inittype, $clientversion) = split(/:/, $remotereq);
6520: # For LON-CAPA 2.9, the client session will have sent its LON-CAPA
6521: # version when initiating the connection. For LON-CAPA 2.8 and older,
6522: # the version is retrieved from the global %loncaparevs in lonnet.pm.
6523: # $clientversion contains path to keyfile if $inittype eq 'local'
6524: # it's overridden below in this case
6525: $clientversion ||= $Apache::lonnet::loncaparevs{$clientname};
6526:
6527: # If the connection type is ssl, but I didn't get my
6528: # certificate files yet, then I'll drop back to
6529: # insecure (if allowed).
6530:
6531: if($inittype eq "ssl") {
6532: my ($ca, $cert) = lonssl::CertificateFile;
6533: my $kfile = lonssl::KeyFile;
6534: if((!$ca) ||
6535: (!$cert) ||
6536: (!$kfile)) {
6537: $inittype = ""; # This forces insecure attempt.
6538: &logthis("<font color=\"blue\"> Certificates not "
6539: ."installed -- trying insecure auth</font>");
6540: } else { # SSL certificates are in place so
6541: } # Leave the inittype alone.
6542: }
6543:
6544: if($inittype eq "local") {
6545: $clientversion = $perlvar{'lonVersion'};
6546: my $key = LocalConnection($client, $remotereq);
6547: if($key) {
6548: Debug("Got local key $key");
6549: $clientok = 1;
6550: my $cipherkey = pack("H32", $key);
6551: $cipher = new IDEA($cipherkey);
6552: print $client "ok:local\n";
6553: &logthis('<font color="green">'
6554: . "Successful local authentication </font>");
6555: $keymode = "local"
6556: } else {
6557: Debug("Failed to get local key");
6558: $clientok = 0;
6559: shutdown($client, 3);
6560: close $client;
6561: }
6562: } elsif ($inittype eq "ssl") {
6563: my $key = SSLConnection($client);
6564: if ($key) {
6565: $clientok = 1;
6566: my $cipherkey = pack("H32", $key);
6567: $cipher = new IDEA($cipherkey);
6568: &logthis('<font color="green">'
6569: ."Successfull ssl authentication with $clientname </font>");
6570: $keymode = "ssl";
6571:
6572: } else {
6573: $clientok = 0;
6574: close $client;
6575: }
6576:
6577: } else {
6578: my $ok = InsecureConnection($client);
6579: if($ok) {
6580: $clientok = 1;
6581: &logthis('<font color="green">'
6582: ."Successful insecure authentication with $clientname </font>");
6583: print $client "ok\n";
6584: $keymode = "insecure";
6585: } else {
6586: &logthis('<font color="yellow">'
6587: ."Attempted insecure connection disallowed </font>");
6588: close $client;
6589: $clientok = 0;
6590:
6591: }
6592: }
6593: } else {
6594: &logthis(
6595: "<font color='blue'>WARNING: "
6596: ."$clientip failed to initialize: >$remotereq< </font>");
6597: &status('No init '.$clientip);
6598: }
6599:
6600: } else {
6601: &logthis(
6602: "<font color='blue'>WARNING: Unknown client $clientip</font>");
6603: &status('Hung up on '.$clientip);
6604: }
6605:
6606: if ($clientok) {
6607: # ---------------- New known client connecting, could mean machine online again
6608: if (&Apache::lonnet::get_host_ip($currenthostid) ne $clientip
6609: && $clientip ne '127.0.0.1') {
6610: &Apache::lonnet::reconlonc($clientname);
6611: }
6612: &logthis("<font color='green'>Established connection: $clientname</font>");
6613: &status('Will listen to '.$clientname);
6614: # ------------------------------------------------------------ Process requests
6615: my $keep_going = 1;
6616: my $user_input;
6617: my $clienthost = &Apache::lonnet::hostname($clientname);
6618: my $clientserverhomeID = &Apache::lonnet::get_server_homeID($clienthost);
6619: $clienthomedom = &Apache::lonnet::host_domain($clientserverhomeID);
6620: while(($user_input = get_request) && $keep_going) {
6621: alarm(120);
6622: Debug("Main: Got $user_input\n");
6623: $keep_going = &process_request($user_input);
6624: alarm(0);
6625: &status('Listening to '.$clientname." ($keymode)");
6626: }
6627:
6628: # --------------------------------------------- client unknown or fishy, refuse
6629: } else {
6630: print $client "refused\n";
6631: $client->close();
6632: &logthis("<font color='blue'>WARNING: "
6633: ."Rejected client $clientip, closing connection</font>");
6634: }
6635: }
6636:
6637: # =============================================================================
6638:
6639: &logthis("<font color='red'>CRITICAL: "
6640: ."Disconnect from $clientip ($clientname)</font>");
6641:
6642:
6643: # this exit is VERY important, otherwise the child will become
6644: # a producer of more and more children, forking yourself into
6645: # process death.
6646: exit;
6647:
6648: }
6649: #
6650: # Determine if a user is an author for the indicated domain.
6651: #
6652: # Parameters:
6653: # domain - domain to check in .
6654: # user - Name of user to check.
6655: #
6656: # Return:
6657: # 1 - User is an author for domain.
6658: # 0 - User is not an author for domain.
6659: sub is_author {
6660: my ($domain, $user) = @_;
6661:
6662: &Debug("is_author: $user @ $domain");
6663:
6664: my $hashref = &tie_user_hash($domain, $user, "roles",
6665: &GDBM_READER());
6666:
6667: # Author role should show up as a key /domain/_au
6668:
6669: my $value;
6670: if ($hashref) {
6671:
6672: my $key = "/$domain/_au";
6673: if (defined($hashref)) {
6674: $value = $hashref->{$key};
6675: if(!untie_user_hash($hashref)) {
6676: return 'error: ' . ($!+0)." untie (GDBM) Failed";
6677: }
6678: }
6679:
6680: if(defined($value)) {
6681: &Debug("$user @ $domain is an author");
6682: }
6683: } else {
6684: return 'error: '.($!+0)." tie (GDBM) Failed";
6685: }
6686:
6687: return defined($value);
6688: }
6689: #
6690: # Checks to see if the input roleput request was to set
6691: # an author role. If so, creates construction space
6692: # Parameters:
6693: # request - The request sent to the rolesput subchunk.
6694: # We're looking for /domain/_au
6695: # domain - The domain in which the user is having roles doctored.
6696: # user - Name of the user for which the role is being put.
6697: # authtype - The authentication type associated with the user.
6698: #
6699: sub manage_permissions {
6700: my ($request, $domain, $user, $authtype) = @_;
6701: # See if the request is of the form /$domain/_au
6702: if($request =~ /^(\/\Q$domain\E\/_au)$/) { # It's an author rolesput...
6703: my $path=$perlvar{'lonDocRoot'}."/priv/$domain";
6704: unless (-e $path) {
6705: mkdir($path);
6706: }
6707: unless (-e $path.'/'.$user) {
6708: mkdir($path.'/'.$user);
6709: }
6710: }
6711: }
6712:
6713:
6714: #
6715: # Return the full path of a user password file, whether it exists or not.
6716: # Parameters:
6717: # domain - Domain in which the password file lives.
6718: # user - name of the user.
6719: # Returns:
6720: # Full passwd path:
6721: #
6722: sub password_path {
6723: my ($domain, $user) = @_;
6724: return &propath($domain, $user).'/passwd';
6725: }
6726:
6727: # Password Filename
6728: # Returns the path to a passwd file given domain and user... only if
6729: # it exists.
6730: # Parameters:
6731: # domain - Domain in which to search.
6732: # user - username.
6733: # Returns:
6734: # - If the password file exists returns its path.
6735: # - If the password file does not exist, returns undefined.
6736: #
6737: sub password_filename {
6738: my ($domain, $user) = @_;
6739:
6740: Debug ("PasswordFilename called: dom = $domain user = $user");
6741:
6742: my $path = &password_path($domain, $user);
6743: Debug("PasswordFilename got path: $path");
6744: if(-e $path) {
6745: return $path;
6746: } else {
6747: return undef;
6748: }
6749: }
6750:
6751: #
6752: # Rewrite the contents of the user's passwd file.
6753: # Parameters:
6754: # domain - domain of the user.
6755: # name - User's name.
6756: # contents - New contents of the file.
6757: # Returns:
6758: # 0 - Failed.
6759: # 1 - Success.
6760: #
6761: sub rewrite_password_file {
6762: my ($domain, $user, $contents) = @_;
6763:
6764: my $file = &password_filename($domain, $user);
6765: if (defined $file) {
6766: my $pf = IO::File->new(">$file");
6767: if($pf) {
6768: print $pf "$contents\n";
6769: return 1;
6770: } else {
6771: return 0;
6772: }
6773: } else {
6774: return 0;
6775: }
6776:
6777: }
6778:
6779: #
6780: # get_auth_type - Determines the authorization type of a user in a domain.
6781:
6782: # Returns the authorization type or nouser if there is no such user.
6783: #
6784: sub get_auth_type {
6785: my ($domain, $user) = @_;
6786:
6787: Debug("get_auth_type( $domain, $user ) \n");
6788: my $proname = &propath($domain, $user);
6789: my $passwdfile = "$proname/passwd";
6790: if( -e $passwdfile ) {
6791: my $pf = IO::File->new($passwdfile);
6792: my $realpassword = <$pf>;
6793: chomp($realpassword);
6794: Debug("Password info = $realpassword\n");
6795: my ($authtype, $contentpwd) = split(/:/, $realpassword);
6796: Debug("Authtype = $authtype, content = $contentpwd\n");
6797: return "$authtype:$contentpwd";
6798: } else {
6799: Debug("Returning nouser");
6800: return "nouser";
6801: }
6802: }
6803:
6804: #
6805: # Validate a user given their domain, name and password. This utility
6806: # function is used by both AuthenticateHandler and ChangePasswordHandler
6807: # to validate the login credentials of a user.
6808: # Parameters:
6809: # $domain - The domain being logged into (this is required due to
6810: # the capability for multihomed systems.
6811: # $user - The name of the user being validated.
6812: # $password - The user's propoposed password.
6813: #
6814: # Returns:
6815: # 1 - The domain,user,pasword triplet corresponds to a valid
6816: # user.
6817: # 0 - The domain,user,password triplet is not a valid user.
6818: #
6819: sub validate_user {
6820: my ($domain, $user, $password, $checkdefauth) = @_;
6821:
6822: # Why negative ~pi you may well ask? Well this function is about
6823: # authentication, and therefore very important to get right.
6824: # I've initialized the flag that determines whether or not I've
6825: # validated correctly to a value it's not supposed to get.
6826: # At the end of this function. I'll ensure that it's not still that
6827: # value so we don't just wind up returning some accidental value
6828: # as a result of executing an unforseen code path that
6829: # did not set $validated. At the end of valid execution paths,
6830: # validated shoule be 1 for success or 0 for failuer.
6831:
6832: my $validated = -3.14159;
6833:
6834: # How we authenticate is determined by the type of authentication
6835: # the user has been assigned. If the authentication type is
6836: # "nouser", the user does not exist so we will return 0.
6837:
6838: my $contents = &get_auth_type($domain, $user);
6839: my ($howpwd, $contentpwd) = split(/:/, $contents);
6840:
6841: my $null = pack("C",0); # Used by kerberos auth types.
6842:
6843: if ($howpwd eq 'nouser') {
6844: if ($checkdefauth) {
6845: my %domdefaults = &Apache::lonnet::get_domain_defaults($domain);
6846: if ($domdefaults{'auth_def'} eq 'localauth') {
6847: $howpwd = $domdefaults{'auth_def'};
6848: $contentpwd = $domdefaults{'auth_arg_def'};
6849: } elsif ((($domdefaults{'auth_def'} eq 'krb4') ||
6850: ($domdefaults{'auth_def'} eq 'krb5')) &&
6851: ($domdefaults{'auth_arg_def'} ne '')) {
6852: $howpwd = $domdefaults{'auth_def'};
6853: $contentpwd = $domdefaults{'auth_arg_def'};
6854: }
6855: }
6856: }
6857: if ($howpwd ne 'nouser') {
6858: if($howpwd eq "internal") { # Encrypted is in local password file.
6859: $validated = (crypt($password, $contentpwd) eq $contentpwd);
6860: }
6861: elsif ($howpwd eq "unix") { # User is a normal unix user.
6862: $contentpwd = (getpwnam($user))[1];
6863: if($contentpwd) {
6864: if($contentpwd eq 'x') { # Shadow password file...
6865: my $pwauth_path = "/usr/local/sbin/pwauth";
6866: open PWAUTH, "|$pwauth_path" or
6867: die "Cannot invoke authentication";
6868: print PWAUTH "$user\n$password\n";
6869: close PWAUTH;
6870: $validated = ! $?;
6871:
6872: } else { # Passwords in /etc/passwd.
6873: $validated = (crypt($password,
6874: $contentpwd) eq $contentpwd);
6875: }
6876: } else {
6877: $validated = 0;
6878: }
6879: } elsif ($howpwd eq "krb4") { # user is in kerberos 4 auth. domain.
6880: my $checkwithkrb5 = 0;
6881: if ($dist =~/^fedora(\d+)$/) {
6882: if ($1 > 11) {
6883: $checkwithkrb5 = 1;
6884: }
6885: } elsif ($dist =~ /^suse([\d.]+)$/) {
6886: if ($1 > 11.1) {
6887: $checkwithkrb5 = 1;
6888: }
6889: }
6890: if ($checkwithkrb5) {
6891: $validated = &krb5_authen($password,$null,$user,$contentpwd);
6892: } else {
6893: $validated = &krb4_authen($password,$null,$user,$contentpwd);
6894: }
6895: } elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain.
6896: $validated = &krb5_authen($password,$null,$user,$contentpwd);
6897: } elsif ($howpwd eq "localauth") {
6898: # Authenticate via installation specific authentcation method:
6899: $validated = &localauth::localauth($user,
6900: $password,
6901: $contentpwd,
6902: $domain);
6903: if ($validated < 0) {
6904: &logthis("localauth for $contentpwd $user:$domain returned a $validated");
6905: $validated = 0;
6906: }
6907: } else { # Unrecognized auth is also bad.
6908: $validated = 0;
6909: }
6910: } else {
6911: $validated = 0;
6912: }
6913: #
6914: # $validated has the correct stat of the authentication:
6915: #
6916:
6917: unless ($validated != -3.14159) {
6918: # I >really really< want to know if this happens.
6919: # since it indicates that user authentication is badly
6920: # broken in some code path.
6921: #
6922: die "ValidateUser - failed to set the value of validated $domain, $user $password";
6923: }
6924: return $validated;
6925: }
6926:
6927: sub krb4_authen {
6928: my ($password,$null,$user,$contentpwd) = @_;
6929: my $validated = 0;
6930: if (!($password =~ /$null/) ) { # Null password not allowed.
6931: eval {
6932: require Authen::Krb4;
6933: };
6934: if (!$@) {
6935: my $k4error = &Authen::Krb4::get_pw_in_tkt($user,
6936: "",
6937: $contentpwd,,
6938: 'krbtgt',
6939: $contentpwd,
6940: 1,
6941: $password);
6942: if(!$k4error) {
6943: $validated = 1;
6944: } else {
6945: $validated = 0;
6946: &logthis('krb4: '.$user.', '.$contentpwd.', '.
6947: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
6948: }
6949: } else {
6950: $validated = krb5_authen($password,$null,$user,$contentpwd);
6951: }
6952: }
6953: return $validated;
6954: }
6955:
6956: sub krb5_authen {
6957: my ($password,$null,$user,$contentpwd) = @_;
6958: my $validated = 0;
6959: if(!($password =~ /$null/)) { # Null password not allowed.
6960: my $krbclient = &Authen::Krb5::parse_name($user.'@'
6961: .$contentpwd);
6962: my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd;
6963: my $krbserver = &Authen::Krb5::parse_name($krbservice);
6964: my $credentials= &Authen::Krb5::cc_default();
6965: $credentials->initialize(&Authen::Krb5::parse_name($user.'@'
6966: .$contentpwd));
6967: my $krbreturn;
6968: if (exists(&Authen::Krb5::get_init_creds_password)) {
6969: $krbreturn =
6970: &Authen::Krb5::get_init_creds_password($krbclient,$password,
6971: $krbservice);
6972: $validated = (ref($krbreturn) eq 'Authen::Krb5::Creds');
6973: } else {
6974: $krbreturn =
6975: &Authen::Krb5::get_in_tkt_with_password($krbclient,$krbserver,
6976: $password,$credentials);
6977: $validated = ($krbreturn == 1);
6978: }
6979: if (!$validated) {
6980: &logthis('krb5: '.$user.', '.$contentpwd.', '.
6981: &Authen::Krb5::error());
6982: }
6983: }
6984: return $validated;
6985: }
6986:
6987: sub addline {
6988: my ($fname,$hostid,$ip,$newline)=@_;
6989: my $contents;
6990: my $found=0;
6991: my $expr='^'.quotemeta($hostid).':'.quotemeta($ip).':';
6992: my $sh;
6993: if ($sh=IO::File->new("$fname.subscription")) {
6994: while (my $subline=<$sh>) {
6995: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
6996: }
6997: $sh->close();
6998: }
6999: $sh=IO::File->new(">$fname.subscription");
7000: if ($contents) { print $sh $contents; }
7001: if ($newline) { print $sh $newline; }
7002: $sh->close();
7003: return $found;
7004: }
7005:
7006: sub get_chat {
7007: my ($cdom,$cname,$udom,$uname,$group)=@_;
7008:
7009: my @entries=();
7010: my $namespace = 'nohist_chatroom';
7011: my $namespace_inroom = 'nohist_inchatroom';
7012: if ($group ne '') {
7013: $namespace .= '_'.$group;
7014: $namespace_inroom .= '_'.$group;
7015: }
7016: my $hashref = &tie_user_hash($cdom, $cname, $namespace,
7017: &GDBM_READER());
7018: if ($hashref) {
7019: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
7020: &untie_user_hash($hashref);
7021: }
7022: my @participants=();
7023: my $cutoff=time-60;
7024: $hashref = &tie_user_hash($cdom, $cname, $namespace_inroom,
7025: &GDBM_WRCREAT());
7026: if ($hashref) {
7027: $hashref->{$uname.':'.$udom}=time;
7028: foreach my $user (sort(keys(%$hashref))) {
7029: if ($hashref->{$user}>$cutoff) {
7030: push(@participants, 'active_participant:'.$user);
7031: }
7032: }
7033: &untie_user_hash($hashref);
7034: }
7035: return (@participants,@entries);
7036: }
7037:
7038: sub chat_add {
7039: my ($cdom,$cname,$newchat,$group)=@_;
7040: my @entries=();
7041: my $time=time;
7042: my $namespace = 'nohist_chatroom';
7043: my $logfile = 'chatroom.log';
7044: if ($group ne '') {
7045: $namespace .= '_'.$group;
7046: $logfile = 'chatroom_'.$group.'.log';
7047: }
7048: my $hashref = &tie_user_hash($cdom, $cname, $namespace,
7049: &GDBM_WRCREAT());
7050: if ($hashref) {
7051: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
7052: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
7053: my ($thentime,$idnum)=split(/\_/,$lastid);
7054: my $newid=$time.'_000000';
7055: if ($thentime==$time) {
7056: $idnum=~s/^0+//;
7057: $idnum++;
7058: $idnum=substr('000000'.$idnum,-6,6);
7059: $newid=$time.'_'.$idnum;
7060: }
7061: $hashref->{$newid}=$newchat;
7062: my $expired=$time-3600;
7063: foreach my $comment (keys(%$hashref)) {
7064: my ($thistime) = ($comment=~/(\d+)\_/);
7065: if ($thistime<$expired) {
7066: delete $hashref->{$comment};
7067: }
7068: }
7069: {
7070: my $proname=&propath($cdom,$cname);
7071: if (open(CHATLOG,">>$proname/$logfile")) {
7072: print CHATLOG ("$time:".&unescape($newchat)."\n");
7073: }
7074: close(CHATLOG);
7075: }
7076: &untie_user_hash($hashref);
7077: }
7078: }
7079:
7080: sub unsub {
7081: my ($fname,$clientip)=@_;
7082: my $result;
7083: my $unsubs = 0; # Number of successful unsubscribes:
7084:
7085:
7086: # An old way subscriptions were handled was to have a
7087: # subscription marker file:
7088:
7089: Debug("Attempting unlink of $fname.$clientname");
7090: if (unlink("$fname.$clientname")) {
7091: $unsubs++; # Successful unsub via marker file.
7092: }
7093:
7094: # The more modern way to do it is to have a subscription list
7095: # file:
7096:
7097: if (-e "$fname.subscription") {
7098: my $found=&addline($fname,$clientname,$clientip,'');
7099: if ($found) {
7100: $unsubs++;
7101: }
7102: }
7103:
7104: # If either or both of these mechanisms succeeded in unsubscribing a
7105: # resource we can return ok:
7106:
7107: if($unsubs) {
7108: $result = "ok\n";
7109: } else {
7110: $result = "not_subscribed\n";
7111: }
7112:
7113: return $result;
7114: }
7115:
7116: sub currentversion {
7117: my $fname=shift;
7118: my $version=-1;
7119: my $ulsdir='';
7120: if ($fname=~/^(.+)\/[^\/]+$/) {
7121: $ulsdir=$1;
7122: }
7123: my ($fnamere1,$fnamere2);
7124: # remove version if already specified
7125: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
7126: # get the bits that go before and after the version number
7127: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
7128: $fnamere1=$1;
7129: $fnamere2='.'.$2;
7130: }
7131: if (-e $fname) { $version=1; }
7132: if (-e $ulsdir) {
7133: if(-d $ulsdir) {
7134: if (opendir(LSDIR,$ulsdir)) {
7135: my $ulsfn;
7136: while ($ulsfn=readdir(LSDIR)) {
7137: # see if this is a regular file (ignore links produced earlier)
7138: my $thisfile=$ulsdir.'/'.$ulsfn;
7139: unless (-l $thisfile) {
7140: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
7141: if ($1>$version) { $version=$1; }
7142: }
7143: }
7144: }
7145: closedir(LSDIR);
7146: $version++;
7147: }
7148: }
7149: }
7150: return $version;
7151: }
7152:
7153: sub thisversion {
7154: my $fname=shift;
7155: my $version=-1;
7156: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
7157: $version=$1;
7158: }
7159: return $version;
7160: }
7161:
7162: sub subscribe {
7163: my ($userinput,$clientip)=@_;
7164: my $result;
7165: my ($cmd,$fname)=split(/:/,$userinput,2);
7166: my $ownership=&ishome($fname);
7167: if ($ownership eq 'owner') {
7168: # explitly asking for the current version?
7169: unless (-e $fname) {
7170: my $currentversion=¤tversion($fname);
7171: if (&thisversion($fname)==$currentversion) {
7172: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
7173: my $root=$1;
7174: my $extension=$2;
7175: symlink($root.'.'.$extension,
7176: $root.'.'.$currentversion.'.'.$extension);
7177: unless ($extension=~/\.meta$/) {
7178: symlink($root.'.'.$extension.'.meta',
7179: $root.'.'.$currentversion.'.'.$extension.'.meta');
7180: }
7181: }
7182: }
7183: }
7184: if (-e $fname) {
7185: if (-d $fname) {
7186: $result="directory\n";
7187: } else {
7188: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
7189: my $now=time;
7190: my $found=&addline($fname,$clientname,$clientip,
7191: "$clientname:$clientip:$now\n");
7192: if ($found) { $result="$fname\n"; }
7193: # if they were subscribed to only meta data, delete that
7194: # subscription, when you subscribe to a file you also get
7195: # the metadata
7196: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
7197: $fname=~s/\/home\/httpd\/html\/res/raw/;
7198: my $protocol = $Apache::lonnet::protocol{$perlvar{'lonHostID'}};
7199: $protocol = 'http' if ($protocol ne 'https');
7200: $fname=$protocol.'://'.&Apache::lonnet::hostname($perlvar{'lonHostID'})."/".$fname;
7201: $result="$fname\n";
7202: }
7203: } else {
7204: $result="not_found\n";
7205: }
7206: } else {
7207: $result="rejected\n";
7208: }
7209: return $result;
7210: }
7211: # Change the passwd of a unix user. The caller must have
7212: # first verified that the user is a loncapa user.
7213: #
7214: # Parameters:
7215: # user - Unix user name to change.
7216: # pass - New password for the user.
7217: # Returns:
7218: # ok - if success
7219: # other - Some meaningfule error message string.
7220: # NOTE:
7221: # invokes a setuid script to change the passwd.
7222: sub change_unix_password {
7223: my ($user, $pass) = @_;
7224:
7225: &Debug("change_unix_password");
7226: my $execdir=$perlvar{'lonDaemons'};
7227: &Debug("Opening lcpasswd pipeline");
7228: my $pf = IO::File->new("|$execdir/lcpasswd > "
7229: ."$perlvar{'lonDaemons'}"
7230: ."/logs/lcpasswd.log");
7231: print $pf "$user\n$pass\n$pass\n";
7232: close $pf;
7233: my $err = $?;
7234: return ($err < @passwderrors) ? $passwderrors[$err] :
7235: "pwchange_falure - unknown error";
7236:
7237:
7238: }
7239:
7240:
7241: sub make_passwd_file {
7242: my ($uname,$udom,$umode,$npass,$passfilename)=@_;
7243: my $result="ok";
7244: if ($umode eq 'krb4' or $umode eq 'krb5') {
7245: {
7246: my $pf = IO::File->new(">$passfilename");
7247: if ($pf) {
7248: print $pf "$umode:$npass\n";
7249: } else {
7250: $result = "pass_file_failed_error";
7251: }
7252: }
7253: } elsif ($umode eq 'internal') {
7254: my $salt=time;
7255: $salt=substr($salt,6,2);
7256: my $ncpass=crypt($npass,$salt);
7257: {
7258: &Debug("Creating internal auth");
7259: my $pf = IO::File->new(">$passfilename");
7260: if($pf) {
7261: print $pf "internal:$ncpass\n";
7262: } else {
7263: $result = "pass_file_failed_error";
7264: }
7265: }
7266: } elsif ($umode eq 'localauth') {
7267: {
7268: my $pf = IO::File->new(">$passfilename");
7269: if($pf) {
7270: print $pf "localauth:$npass\n";
7271: } else {
7272: $result = "pass_file_failed_error";
7273: }
7274: }
7275: } elsif ($umode eq 'unix') {
7276: {
7277: #
7278: # Don't allow the creation of privileged accounts!!! that would
7279: # be real bad!!!
7280: #
7281: my $uid = getpwnam($uname);
7282: if((defined $uid) && ($uid == 0)) {
7283: &logthis(">>>Attempt to create privileged account blocked");
7284: return "no_priv_account_error\n";
7285: }
7286:
7287: my $execpath ="$perlvar{'lonDaemons'}/"."lcuseradd";
7288:
7289: my $lc_error_file = $execdir."/tmp/lcuseradd".$$.".status";
7290: {
7291: &Debug("Executing external: ".$execpath);
7292: &Debug("user = ".$uname.", Password =". $npass);
7293: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
7294: print $se "$uname\n";
7295: print $se "$udom\n";
7296: print $se "$npass\n";
7297: print $se "$npass\n";
7298: print $se "$lc_error_file\n"; # Status -> unique file.
7299: }
7300: if (-r $lc_error_file) {
7301: &Debug("Opening error file: $lc_error_file");
7302: my $error = IO::File->new("< $lc_error_file");
7303: my $useraddok = <$error>;
7304: $error->close;
7305: unlink($lc_error_file);
7306:
7307: chomp $useraddok;
7308:
7309: if($useraddok > 0) {
7310: my $error_text = &lcuseraddstrerror($useraddok);
7311: &logthis("Failed lcuseradd: $error_text");
7312: $result = "lcuseradd_failed:$error_text";
7313: } else {
7314: my $pf = IO::File->new(">$passfilename");
7315: if($pf) {
7316: print $pf "unix:\n";
7317: } else {
7318: $result = "pass_file_failed_error";
7319: }
7320: }
7321: } else {
7322: &Debug("Could not locate lcuseradd error: $lc_error_file");
7323: $result="bug_lcuseradd_no_output_file";
7324: }
7325: }
7326: } elsif ($umode eq 'none') {
7327: {
7328: my $pf = IO::File->new("> $passfilename");
7329: if($pf) {
7330: print $pf "none:\n";
7331: } else {
7332: $result = "pass_file_failed_error";
7333: }
7334: }
7335: } else {
7336: $result="auth_mode_error";
7337: }
7338: return $result;
7339: }
7340:
7341: sub convert_photo {
7342: my ($start,$dest)=@_;
7343: system("convert $start $dest");
7344: }
7345:
7346: sub sethost {
7347: my ($remotereq) = @_;
7348: my (undef,$hostid)=split(/:/,$remotereq);
7349: # ignore sethost if we are already correct
7350: if ($hostid eq $currenthostid) {
7351: return 'ok';
7352: }
7353:
7354: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
7355: if (&Apache::lonnet::get_host_ip($perlvar{'lonHostID'})
7356: eq &Apache::lonnet::get_host_ip($hostid)) {
7357: $currenthostid =$hostid;
7358: $currentdomainid=&Apache::lonnet::host_domain($hostid);
7359: # &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
7360: } else {
7361: &logthis("Requested host id $hostid not an alias of ".
7362: $perlvar{'lonHostID'}." refusing connection");
7363: return 'unable_to_set';
7364: }
7365: return 'ok';
7366: }
7367:
7368: sub version {
7369: my ($userinput)=@_;
7370: $remoteVERSION=(split(/:/,$userinput))[1];
7371: return "version:$VERSION";
7372: }
7373:
7374: sub get_usersession_config {
7375: my ($dom,$name) = @_;
7376: my ($usersessionconf,$cached)=&Apache::lonnet::is_cached_new($name,$dom);
7377: if (defined($cached)) {
7378: return $usersessionconf;
7379: } else {
7380: my %domconfig = &Apache::lonnet::get_dom('configuration',['usersessions'],$dom);
7381: if (ref($domconfig{'usersessions'}) eq 'HASH') {
7382: &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'usersessions'},3600);
7383: return $domconfig{'usersessions'};
7384: }
7385: }
7386: return;
7387: }
7388:
7389:
7390: sub distro_and_arch {
7391: return $dist.':'.$arch;
7392: }
7393:
7394: # ----------------------------------- POD (plain old documentation, CPAN style)
7395:
7396: =head1 NAME
7397:
7398: lond - "LON Daemon" Server (port "LOND" 5663)
7399:
7400: =head1 SYNOPSIS
7401:
7402: Usage: B<lond>
7403:
7404: Should only be run as user=www. This is a command-line script which
7405: is invoked by B<loncron>. There is no expectation that a typical user
7406: will manually start B<lond> from the command-line. (In other words,
7407: DO NOT START B<lond> YOURSELF.)
7408:
7409: =head1 DESCRIPTION
7410:
7411: There are two characteristics associated with the running of B<lond>,
7412: PROCESS MANAGEMENT (starting, stopping, handling child processes)
7413: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
7414: subscriptions, etc). These are described in two large
7415: sections below.
7416:
7417: B<PROCESS MANAGEMENT>
7418:
7419: Preforker - server who forks first. Runs as a daemon. HUPs.
7420: Uses IDEA encryption
7421:
7422: B<lond> forks off children processes that correspond to the other servers
7423: in the network. Management of these processes can be done at the
7424: parent process level or the child process level.
7425:
7426: B<logs/lond.log> is the location of log messages.
7427:
7428: The process management is now explained in terms of linux shell commands,
7429: subroutines internal to this code, and signal assignments:
7430:
7431: =over 4
7432:
7433: =item *
7434:
7435: PID is stored in B<logs/lond.pid>
7436:
7437: This is the process id number of the parent B<lond> process.
7438:
7439: =item *
7440:
7441: SIGTERM and SIGINT
7442:
7443: Parent signal assignment:
7444: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
7445:
7446: Child signal assignment:
7447: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
7448: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
7449: to restart a new child.)
7450:
7451: Command-line invocations:
7452: B<kill> B<-s> SIGTERM I<PID>
7453: B<kill> B<-s> SIGINT I<PID>
7454:
7455: Subroutine B<HUNTSMAN>:
7456: This is only invoked for the B<lond> parent I<PID>.
7457: This kills all the children, and then the parent.
7458: The B<lonc.pid> file is cleared.
7459:
7460: =item *
7461:
7462: SIGHUP
7463:
7464: Current bug:
7465: This signal can only be processed the first time
7466: on the parent process. Subsequent SIGHUP signals
7467: have no effect.
7468:
7469: Parent signal assignment:
7470: $SIG{HUP} = \&HUPSMAN;
7471:
7472: Child signal assignment:
7473: none (nothing happens)
7474:
7475: Command-line invocations:
7476: B<kill> B<-s> SIGHUP I<PID>
7477:
7478: Subroutine B<HUPSMAN>:
7479: This is only invoked for the B<lond> parent I<PID>,
7480: This kills all the children, and then the parent.
7481: The B<lond.pid> file is cleared.
7482:
7483: =item *
7484:
7485: SIGUSR1
7486:
7487: Parent signal assignment:
7488: $SIG{USR1} = \&USRMAN;
7489:
7490: Child signal assignment:
7491: $SIG{USR1}= \&logstatus;
7492:
7493: Command-line invocations:
7494: B<kill> B<-s> SIGUSR1 I<PID>
7495:
7496: Subroutine B<USRMAN>:
7497: When invoked for the B<lond> parent I<PID>,
7498: SIGUSR1 is sent to all the children, and the status of
7499: each connection is logged.
7500:
7501: =item *
7502:
7503: SIGUSR2
7504:
7505: Parent Signal assignment:
7506: $SIG{USR2} = \&UpdateHosts
7507:
7508: Child signal assignment:
7509: NONE
7510:
7511:
7512: =item *
7513:
7514: SIGCHLD
7515:
7516: Parent signal assignment:
7517: $SIG{CHLD} = \&REAPER;
7518:
7519: Child signal assignment:
7520: none
7521:
7522: Command-line invocations:
7523: B<kill> B<-s> SIGCHLD I<PID>
7524:
7525: Subroutine B<REAPER>:
7526: This is only invoked for the B<lond> parent I<PID>.
7527: Information pertaining to the child is removed.
7528: The socket port is cleaned up.
7529:
7530: =back
7531:
7532: B<SERVER-SIDE ACTIVITIES>
7533:
7534: Server-side information can be accepted in an encrypted or non-encrypted
7535: method.
7536:
7537: =over 4
7538:
7539: =item ping
7540:
7541: Query a client in the hosts.tab table; "Are you there?"
7542:
7543: =item pong
7544:
7545: Respond to a ping query.
7546:
7547: =item ekey
7548:
7549: Read in encrypted key, make cipher. Respond with a buildkey.
7550:
7551: =item load
7552:
7553: Respond with CPU load based on a computation upon /proc/loadavg.
7554:
7555: =item currentauth
7556:
7557: Reply with current authentication information (only over an
7558: encrypted channel).
7559:
7560: =item auth
7561:
7562: Only over an encrypted channel, reply as to whether a user's
7563: authentication information can be validated.
7564:
7565: =item passwd
7566:
7567: Allow for a password to be set.
7568:
7569: =item makeuser
7570:
7571: Make a user.
7572:
7573: =item passwd
7574:
7575: Allow for authentication mechanism and password to be changed.
7576:
7577: =item home
7578:
7579: Respond to a question "are you the home for a given user?"
7580:
7581: =item update
7582:
7583: Update contents of a subscribed resource.
7584:
7585: =item unsubscribe
7586:
7587: The server is unsubscribing from a resource.
7588:
7589: =item subscribe
7590:
7591: The server is subscribing to a resource.
7592:
7593: =item log
7594:
7595: Place in B<logs/lond.log>
7596:
7597: =item put
7598:
7599: stores hash in namespace
7600:
7601: =item rolesput
7602:
7603: put a role into a user's environment
7604:
7605: =item get
7606:
7607: returns hash with keys from array
7608: reference filled in from namespace
7609:
7610: =item eget
7611:
7612: returns hash with keys from array
7613: reference filled in from namesp (encrypts the return communication)
7614:
7615: =item rolesget
7616:
7617: get a role from a user's environment
7618:
7619: =item del
7620:
7621: deletes keys out of array from namespace
7622:
7623: =item keys
7624:
7625: returns namespace keys
7626:
7627: =item dump
7628:
7629: dumps the complete (or key matching regexp) namespace into a hash
7630:
7631: =item store
7632:
7633: stores hash permanently
7634: for this url; hashref needs to be given and should be a \%hashname; the
7635: remaining args aren't required and if they aren't passed or are '' they will
7636: be derived from the ENV
7637:
7638: =item restore
7639:
7640: returns a hash for a given url
7641:
7642: =item querysend
7643:
7644: Tells client about the lonsql process that has been launched in response
7645: to a sent query.
7646:
7647: =item queryreply
7648:
7649: Accept information from lonsql and make appropriate storage in temporary
7650: file space.
7651:
7652: =item idput
7653:
7654: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
7655: for each student, defined perhaps by the institutional Registrar.)
7656:
7657: =item idget
7658:
7659: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
7660: for each student, defined perhaps by the institutional Registrar.)
7661:
7662: =item tmpput
7663:
7664: Accept and store information in temporary space.
7665:
7666: =item tmpget
7667:
7668: Send along temporarily stored information.
7669:
7670: =item ls
7671:
7672: List part of a user's directory.
7673:
7674: =item pushtable
7675:
7676: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
7677: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
7678: must be restored manually in case of a problem with the new table file.
7679: pushtable requires that the request be encrypted and validated via
7680: ValidateManager. The form of the command is:
7681: enc:pushtable tablename <tablecontents> \n
7682: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
7683: cleartext newline.
7684:
7685: =item Hanging up (exit or init)
7686:
7687: What to do when a client tells the server that they (the client)
7688: are leaving the network.
7689:
7690: =item unknown command
7691:
7692: If B<lond> is sent an unknown command (not in the list above),
7693: it replys to the client "unknown_cmd".
7694:
7695:
7696: =item UNKNOWN CLIENT
7697:
7698: If the anti-spoofing algorithm cannot verify the client,
7699: the client is rejected (with a "refused" message sent
7700: to the client, and the connection is closed.
7701:
7702: =back
7703:
7704: =head1 PREREQUISITES
7705:
7706: IO::Socket
7707: IO::File
7708: Apache::File
7709: POSIX
7710: Crypt::IDEA
7711: LWP::UserAgent()
7712: GDBM_File
7713: Authen::Krb4
7714: Authen::Krb5
7715:
7716: =head1 COREQUISITES
7717:
7718: =head1 OSNAMES
7719:
7720: linux
7721:
7722: =head1 SCRIPT CATEGORIES
7723:
7724: Server/Process
7725:
7726: =cut
7727:
7728:
7729: =pod
7730:
7731: =head1 LOG MESSAGES
7732:
7733: The messages below can be emitted in the lond log. This log is located
7734: in ~httpd/perl/logs/lond.log Many log messages have HTML encapsulation
7735: to provide coloring if examined from inside a web page. Some do not.
7736: Where color is used, the colors are; Red for sometihhng to get excited
7737: about and to follow up on. Yellow for something to keep an eye on to
7738: be sure it does not get worse, Green,and Blue for informational items.
7739:
7740: In the discussions below, sometimes reference is made to ~httpd
7741: when describing file locations. There isn't really an httpd
7742: user, however there is an httpd directory that gets installed in the
7743: place that user home directories go. On linux, this is usually
7744: (always?) /home/httpd.
7745:
7746:
7747: Some messages are colorless. These are usually (not always)
7748: Green/Blue color level messages.
7749:
7750: =over 2
7751:
7752: =item (Red) LocalConnection rejecting non local: <ip> ne 127.0.0.1
7753:
7754: A local connection negotiation was attempted by
7755: a host whose IP address was not 127.0.0.1.
7756: The socket is closed and the child will exit.
7757: lond has three ways to establish an encyrption
7758: key with a client:
7759:
7760: =over 2
7761:
7762: =item local
7763:
7764: The key is written and read from a file.
7765: This is only valid for connections from localhost.
7766:
7767: =item insecure
7768:
7769: The key is generated by the server and
7770: transmitted to the client.
7771:
7772: =item ssl (secure)
7773:
7774: An ssl connection is negotiated with the client,
7775: the key is generated by the server and sent to the
7776: client across this ssl connection before the
7777: ssl connectionis terminated and clear text
7778: transmission resumes.
7779:
7780: =back
7781:
7782: =item (Red) LocalConnection: caller is insane! init = <init> and type = <type>
7783:
7784: The client is local but has not sent an initialization
7785: string that is the literal "init:local" The connection
7786: is closed and the child exits.
7787:
7788: =item Red CRITICAL Can't get key file <error>
7789:
7790: SSL key negotiation is being attempted but the call to
7791: lonssl::KeyFile failed. This usually means that the
7792: configuration file is not correctly defining or protecting
7793: the directories/files lonCertificateDirectory or
7794: lonnetPrivateKey
7795: <error> is a string that describes the reason that
7796: the key file could not be located.
7797:
7798: =item (Red) CRITICAL Can't get certificates <error>
7799:
7800: SSL key negotiation failed because we were not able to retrives our certificate
7801: or the CA's certificate in the call to lonssl::CertificateFile
7802: <error> is the textual reason this failed. Usual reasons:
7803:
7804: =over 2
7805:
7806: =item Apache config file for loncapa incorrect:
7807:
7808: one of the variables
7809: lonCertificateDirectory, lonnetCertificateAuthority, or lonnetCertificate
7810: undefined or incorrect
7811:
7812: =item Permission error:
7813:
7814: The directory pointed to by lonCertificateDirectory is not readable by lond
7815:
7816: =item Permission error:
7817:
7818: Files in the directory pointed to by lonCertificateDirectory are not readable by lond.
7819:
7820: =item Installation error:
7821:
7822: Either the certificate authority file or the certificate have not
7823: been installed in lonCertificateDirectory.
7824:
7825: =item (Red) CRITICAL SSL Socket promotion failed: <err>
7826:
7827: The promotion of the connection from plaintext to SSL failed
7828: <err> is the reason for the failure. There are two
7829: system calls involved in the promotion (one of which failed),
7830: a dup to produce
7831: a second fd on the raw socket over which the encrypted data
7832: will flow and IO::SOcket::SSL->new_from_fd which creates
7833: the SSL connection on the duped fd.
7834:
7835: =item (Blue) WARNING client did not respond to challenge
7836:
7837: This occurs on an insecure (non SSL) connection negotiation request.
7838: lond generates some number from the time, the PID and sends it to
7839: the client. The client must respond by echoing this information back.
7840: If the client does not do so, that's a violation of the challenge
7841: protocols and the connection will be failed.
7842:
7843: =item (Red) No manager table. Nobody can manage!!
7844:
7845: lond has the concept of privileged hosts that
7846: can perform remote management function such
7847: as update the hosts.tab. The manager hosts
7848: are described in the
7849: ~httpd/lonTabs/managers.tab file.
7850: this message is logged if this file is missing.
7851:
7852:
7853: =item (Green) Registering manager <dnsname> as <cluster_name> with <ipaddress>
7854:
7855: Reports the successful parse and registration
7856: of a specific manager.
7857:
7858: =item Green existing host <clustername:dnsname>
7859:
7860: The manager host is already defined in the hosts.tab
7861: the information in that table, rather than the info in the
7862: manager table will be used to determine the manager's ip.
7863:
7864: =item (Red) Unable to craete <filename>
7865:
7866: lond has been asked to create new versions of an administrative
7867: file (by a manager). When this is done, the new file is created
7868: in a temp file and then renamed into place so that there are always
7869: usable administrative files, even if the update fails. This failure
7870: message means that the temp file could not be created.
7871: The update is abandoned, and the old file is available for use.
7872:
7873: =item (Green) CopyFile from <oldname> to <newname> failed
7874:
7875: In an update of administrative files, the copy of the existing file to a
7876: backup file failed. The installation of the new file may still succeed,
7877: but there will not be a back up file to rever to (this should probably
7878: be yellow).
7879:
7880: =item (Green) Pushfile: backed up <oldname> to <newname>
7881:
7882: See above, the backup of the old administrative file succeeded.
7883:
7884: =item (Red) Pushfile: Unable to install <filename> <reason>
7885:
7886: The new administrative file could not be installed. In this case,
7887: the old administrative file is still in use.
7888:
7889: =item (Green) Installed new < filename>.
7890:
7891: The new administrative file was successfullly installed.
7892:
7893: =item (Red) Reinitializing lond pid=<pid>
7894:
7895: The lonc child process <pid> will be sent a USR2
7896: signal.
7897:
7898: =item (Red) Reinitializing self
7899:
7900: We've been asked to re-read our administrative files,and
7901: are doing so.
7902:
7903: =item (Yellow) error:Invalid process identifier <ident>
7904:
7905: A reinit command was received, but the target part of the
7906: command was not valid. It must be either
7907: 'lond' or 'lonc' but was <ident>
7908:
7909: =item (Green) isValideditCommand checking: Command = <command> Key = <key> newline = <newline>
7910:
7911: Checking to see if lond has been handed a valid edit
7912: command. It is possible the edit command is not valid
7913: in that case there are no log messages to indicate that.
7914:
7915: =item Result of password change for <username> pwchange_success
7916:
7917: The password for <username> was
7918: successfully changed.
7919:
7920: =item Unable to open <user> passwd to change password
7921:
7922: Could not rewrite the
7923: internal password file for a user
7924:
7925: =item Result of password change for <user> : <result>
7926:
7927: A unix password change for <user> was attempted
7928: and the pipe returned <result>
7929:
7930: =item LWP GET: <message> for <fname> (<remoteurl>)
7931:
7932: The lightweight process fetch for a resource failed
7933: with <message> the local filename that should
7934: have existed/been created was <fname> the
7935: corresponding URI: <remoteurl> This is emitted in several
7936: places.
7937:
7938: =item Unable to move <transname> to <destname>
7939:
7940: From fetch_user_file_handler - the user file was replicated but could not
7941: be mv'd to its final location.
7942:
7943: =item Looking for <domain> <username>
7944:
7945: From user_has_session_handler - This should be a Debug call instead
7946: it indicates lond is about to check whether the specified user has a
7947: session active on the specified domain on the local host.
7948:
7949: =item Client <ip> (<name>) hanging up: <input>
7950:
7951: lond has been asked to exit by its client. The <ip> and <name> identify the
7952: client systemand <input> is the full exit command sent to the server.
7953:
7954: =item Red CRITICAL: ABNORMAL EXIT. child <pid> for server <hostname> died through a crass with this error->[<message>].
7955:
7956: A lond child terminated. NOte that this termination can also occur when the
7957: child receives the QUIT or DIE signals. <pid> is the process id of the child,
7958: <hostname> the host lond is working for, and <message> the reason the child died
7959: to the best of our ability to get it (I would guess that any numeric value
7960: represents and errno value). This is immediately followed by
7961:
7962: =item Famous last words: Catching exception - <log>
7963:
7964: Where log is some recent information about the state of the child.
7965:
7966: =item Red CRITICAL: TIME OUT <pid>
7967:
7968: Some timeout occured for server <pid>. THis is normally a timeout on an LWP
7969: doing an HTTP::GET.
7970:
7971: =item child <pid> died
7972:
7973: The reaper caught a SIGCHILD for the lond child process <pid>
7974: This should be modified to also display the IP of the dying child
7975: $children{$pid}
7976:
7977: =item Unknown child 0 died
7978: A child died but the wait for it returned a pid of zero which really should not
7979: ever happen.
7980:
7981: =item Child <which> - <pid> looks like we missed it's death
7982:
7983: When a sigchild is received, the reaper process checks all children to see if they are
7984: alive. If children are dying quite quickly, the lack of signal queuing can mean
7985: that a signal hearalds the death of more than one child. If so this message indicates
7986: which other one died. <which> is the ip of a dead child
7987:
7988: =item Free socket: <shutdownretval>
7989:
7990: The HUNTSMAN sub was called due to a SIGINT in a child process. The socket is being shutdown.
7991: for whatever reason, <shutdownretval> is printed but in fact shutdown() is not documented
7992: to return anything. This is followed by:
7993:
7994: =item Red CRITICAL: Shutting down
7995:
7996: Just prior to exit.
7997:
7998: =item Free socket: <shutdownretval>
7999:
8000: The HUPSMAN sub was called due to a SIGHUP. all children get killsed, and lond execs itself.
8001: This is followed by:
8002:
8003: =item (Red) CRITICAL: Restarting
8004:
8005: lond is about to exec itself to restart.
8006:
8007: =item (Blue) Updating connections
8008:
8009: (In response to a USR2). All the children (except the one for localhost)
8010: are about to be killed, the hosts tab reread, and Apache reloaded via apachereload.
8011:
8012: =item (Blue) UpdateHosts killing child <pid> for ip <ip>
8013:
8014: Due to USR2 as above.
8015:
8016: =item (Green) keeping child for ip <ip> (pid = <pid>)
8017:
8018: In response to USR2 as above, the child indicated is not being restarted because
8019: it's assumed that we'll always need a child for the localhost.
8020:
8021:
8022: =item Going to check on the children
8023:
8024: Parent is about to check on the health of the child processes.
8025: Note that this is in response to a USR1 sent to the parent lond.
8026: there may be one or more of the next two messages:
8027:
8028: =item <pid> is dead
8029:
8030: A child that we have in our child hash as alive has evidently died.
8031:
8032: =item Child <pid> did not respond
8033:
8034: In the health check the child <pid> did not update/produce a pid_.txt
8035: file when sent it's USR1 signal. That process is killed with a 9 signal, as it's
8036: assumed to be hung in some un-fixable way.
8037:
8038: =item Finished checking children
8039:
8040: Master processs's USR1 processing is cojmplete.
8041:
8042: =item (Red) CRITICAL: ------- Starting ------
8043:
8044: (There are more '-'s on either side). Lond has forked itself off to
8045: form a new session and is about to start actual initialization.
8046:
8047: =item (Green) Attempting to start child (<client>)
8048:
8049: Started a new child process for <client>. Client is IO::Socket object
8050: connected to the child. This was as a result of a TCP/IP connection from a client.
8051:
8052: =item Unable to determine who caller was, getpeername returned nothing
8053:
8054: In child process initialization. either getpeername returned undef or
8055: a zero sized object was returned. Processing continues, but in my opinion,
8056: this should be cause for the child to exit.
8057:
8058: =item Unable to determine clientip
8059:
8060: In child process initialization. The peer address from getpeername was not defined.
8061: The client address is stored as "Unavailable" and processing continues.
8062:
8063: =item (Yellow) INFO: Connection <ip> <name> connection type = <type>
8064:
8065: In child initialization. A good connectionw as received from <ip>.
8066:
8067: =over 2
8068:
8069: =item <name>
8070:
8071: is the name of the client from hosts.tab.
8072:
8073: =item <type>
8074:
8075: Is the connection type which is either
8076:
8077: =over 2
8078:
8079: =item manager
8080:
8081: The connection is from a manager node, not in hosts.tab
8082:
8083: =item client
8084:
8085: the connection is from a non-manager in the hosts.tab
8086:
8087: =item both
8088:
8089: The connection is from a manager in the hosts.tab.
8090:
8091: =back
8092:
8093: =back
8094:
8095: =item (Blue) Certificates not installed -- trying insecure auth
8096:
8097: One of the certificate file, key file or
8098: certificate authority file could not be found for a client attempting
8099: SSL connection intiation. COnnection will be attemptied in in-secure mode.
8100: (this would be a system with an up to date lond that has not gotten a
8101: certificate from us).
8102:
8103: =item (Green) Successful local authentication
8104:
8105: A local connection successfully negotiated the encryption key.
8106: In this case the IDEA key is in a file (that is hopefully well protected).
8107:
8108: =item (Green) Successful ssl authentication with <client>
8109:
8110: The client (<client> is the peer's name in hosts.tab), has successfully
8111: negotiated an SSL connection with this child process.
8112:
8113: =item (Green) Successful insecure authentication with <client>
8114:
8115:
8116: The client has successfully negotiated an insecure connection withthe child process.
8117:
8118: =item (Yellow) Attempted insecure connection disallowed
8119:
8120: The client attempted and failed to successfully negotiate a successful insecure
8121: connection. This can happen either because the variable londAllowInsecure is false
8122: or undefined, or becuse the child did not successfully echo back the challenge
8123: string.
8124:
8125:
8126: =back
8127:
8128: =back
8129:
8130:
8131: =cut
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