1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.525 2016/09/12 20:20:44 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: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27:
28:
29: # http://www.lon-capa.org/
30: #
31:
32: use strict;
33: use lib '/home/httpd/lib/perl/';
34: use LONCAPA;
35: use LONCAPA::Configuration;
36: use LONCAPA::Lond;
37:
38: use IO::Socket;
39: use IO::File;
40: #use Apache::File;
41: use POSIX;
42: use Crypt::IDEA;
43: use HTTP::Request;
44: use Digest::MD5 qw(md5_hex);
45: use GDBM_File;
46: use Authen::Krb5;
47: use localauth;
48: use localenroll;
49: use localstudentphoto;
50: use File::Copy;
51: use File::Find;
52: use LONCAPA::lonlocal;
53: use LONCAPA::lonssl;
54: use Fcntl qw(:flock);
55: use Apache::lonnet;
56: use Mail::Send;
57: use Crypt::Eksblowfish::Bcrypt;
58: use Digest::SHA;
59: use Encode;
60: use LONCAPA::LWPReq;
61:
62: my $DEBUG = 0; # Non zero to enable debug log entries.
63:
64: my $status='';
65: my $lastlog='';
66:
67: my $VERSION='$Revision: 1.525 $'; #' stupid emacs
68: my $remoteVERSION;
69: my $currenthostid="default";
70: my $currentdomainid;
71:
72: my $client;
73: my $clientip; # IP address of client.
74: my $clientname; # LonCAPA name of client.
75: my $clientversion; # LonCAPA version running on client.
76: my $clienthomedom; # LonCAPA domain of homeID for client.
77: my $clientintdom; # LonCAPA "internet domain" for client.
78: my $clientsameinst; # LonCAPA "internet domain" same for
79: # this host and client.
80: my $clientremoteok; # Client allowed to host domain's users.
81: # (version constraints ignored), not set
82: # if this host and client share "internet domain".
83: my %clientprohibited; # Actions prohibited on client;
84:
85: my $server;
86:
87: my $keymode;
88:
89: my $cipher; # Cipher key negotiated with client
90: my $tmpsnum = 0; # Id of tmpputs.
91:
92: #
93: # Connection type is:
94: # client - All client actions are allowed
95: # manager - only management functions allowed.
96: # both - Both management and client actions are allowed
97: #
98:
99: my $ConnectionType;
100:
101: my %managers; # Ip -> manager names
102:
103: my %perlvar; # Will have the apache conf defined perl vars.
104:
105: my $dist;
106:
107: #
108: # The hash below is used for command dispatching, and is therefore keyed on the request keyword.
109: # Each element of the hash contains a reference to an array that contains:
110: # A reference to a sub that executes the request corresponding to the keyword.
111: # A flag that is true if the request must be encoded to be acceptable.
112: # A mask with bits as follows:
113: # CLIENT_OK - Set when the function is allowed by ordinary clients
114: # MANAGER_OK - Set when the function is allowed to manager clients.
115: #
116: my $CLIENT_OK = 1;
117: my $MANAGER_OK = 2;
118: my %Dispatcher;
119:
120:
121: #
122: # The array below are password error strings."
123: #
124: my $lastpwderror = 13; # Largest error number from lcpasswd.
125: my @passwderrors = ("ok",
126: "pwchange_failure - lcpasswd must be run as user 'www'",
127: "pwchange_failure - lcpasswd got incorrect number of arguments",
128: "pwchange_failure - lcpasswd did not get the right nubmer of input text lines",
129: "pwchange_failure - lcpasswd too many simultaneous pwd changes in progress",
130: "pwchange_failure - lcpasswd User does not exist.",
131: "pwchange_failure - lcpasswd Incorrect current passwd",
132: "pwchange_failure - lcpasswd Unable to su to root.",
133: "pwchange_failure - lcpasswd Cannot set new passwd.",
134: "pwchange_failure - lcpasswd Username has invalid characters",
135: "pwchange_failure - lcpasswd Invalid characters in password",
136: "pwchange_failure - lcpasswd User already exists",
137: "pwchange_failure - lcpasswd Something went wrong with user addition.",
138: "pwchange_failure - lcpasswd Password mismatch",
139: "pwchange_failure - lcpasswd Error filename is invalid");
140:
141:
142: # This array are the errors from lcinstallfile:
143:
144: my @installerrors = ("ok",
145: "Initial user id of client not that of www",
146: "Usage error, not enough command line arguments",
147: "Source filename does not exist",
148: "Destination filename does not exist",
149: "Some file operation failed",
150: "Invalid table filename."
151: );
152:
153: #
154: # The %trust hash classifies commands according to type of trust
155: # required for execution of the command.
156: #
157: # When clients from a different institution request execution of a
158: # particular command, the trust settings for that institution set
159: # for this domain (or default domain for a multi-domain server) will
160: # be checked to see if running the command is allowed.
161: #
162: # Trust types which depend on the "Trust" domain configuration
163: # for the machine's default domain are:
164: #
165: # content ("Access to this domain's content by others")
166: # shared ("Access to other domain's content by this domain")
167: # enroll ("Enrollment in this domain's courses by others")
168: # coaurem ("Co-author roles for this domain's users elsewhere")
169: # domroles ("Domain roles in this domain assignable to others")
170: # catalog ("Course Catalog for this domain displayed elsewhere")
171: # reqcrs ("Requests for creation of courses in this domain by others")
172: # msg ("Users in other domains can send messages to this domain")
173: #
174: # Trust type which depends on the User Session Hosting (remote)
175: # domain configuration for machine's default domain is: "remote".
176: #
177: # Trust types which depend on contents of manager.tab in
178: # /home/httpd/lonTabs is: "manageronly".
179: #
180: # Trust type which requires client to share the same LON-CAPA
181: # "internet domain" (i.e., same institution as this server) is:
182: # "institutiononly".
183: #
184:
185: my %trust = (
186: auth => {remote => 1},
187: autocreatepassword => {remote => 1},
188: autocrsreqchecks => {remote => 1, reqcrs => 1},
189: autocrsrequpdate => {remote => 1},
190: autocrsreqvalidation => {remote => 1},
191: autogetsections => {remote => 1},
192: autoinstcodedefaults => {remote => 1, catalog => 1},
193: autoinstcodeformat => {remote => 1, catalog => 1},
194: autonewcourse => {remote => 1, reqcrs => 1},
195: autophotocheck => {remote => 1, enroll => 1},
196: autophotochoice => {remote => 1},
197: autophotopermission => {remote => 1, enroll => 1},
198: autopossibleinstcodes => {remote => 1, reqcrs => 1},
199: autoretrieve => {remote => 1, enroll => 1, catalog => 1},
200: autorun => {remote => 1, enroll => 1, reqcrs => 1},
201: autovalidateclass_sec => {catalog => 1},
202: autovalidatecourse => {remote => 1, enroll => 1},
203: autovalidateinstcode => {domroles => 1, remote => 1, enroll => 1},
204: changeuserauth => {remote => 1, domroles => 1},
205: chatretr => {remote => 1, enroll => 1},
206: chatsend => {remote => 1, enroll => 1},
207: courseiddump => {remote => 1, domroles => 1, enroll => 1},
208: courseidput => {remote => 1, domroles => 1, enroll => 1},
209: courseidputhash => {remote => 1, domroles => 1, enroll => 1},
210: courselastaccess => {remote => 1, domroles => 1, enroll => 1},
211: currentauth => {remote => 1, domroles => 1, enroll => 1},
212: currentdump => {remote => 1, enroll => 1},
213: currentversion => {remote=> 1, content => 1},
214: dcmaildump => {remote => 1, domroles => 1},
215: dcmailput => {remote => 1, domroles => 1},
216: del => {remote => 1, domroles => 1, enroll => 1, content => 1},
217: deldom => {remote => 1, domroles => 1}, # not currently used
218: devalidatecache => {institutiononly => 1},
219: domroleput => {remote => 1, enroll => 1},
220: domrolesdump => {remote => 1, catalog => 1},
221: du => {remote => 1, enroll => 1},
222: du2 => {remote => 1, enroll => 1},
223: dump => {remote => 1, enroll => 1, domroles => 1},
224: edit => {institutiononly => 1}, #not used currently
225: eget => {remote => 1, domroles => 1, enroll => 1}, #not used currently
226: ekey => {}, #not used currently
227: exit => {anywhere => 1},
228: fetchuserfile => {remote => 1, enroll => 1},
229: get => {remote => 1, domroles => 1, enroll => 1},
230: getdom => {anywhere => 1},
231: home => {anywhere => 1},
232: iddel => {remote => 1, enroll => 1},
233: idget => {remote => 1, enroll => 1},
234: idput => {remote => 1, domroles => 1, enroll => 1},
235: inc => {remote => 1, enroll => 1},
236: init => {anywhere => 1},
237: inst_usertypes => {remote => 1, domroles => 1, enroll => 1},
238: instemailrules => {remote => 1, domroles => 1},
239: instidrulecheck => {remote => 1, domroles => 1,},
240: instidrules => {remote => 1, domroles => 1,},
241: instrulecheck => {remote => 1, enroll => 1, reqcrs => 1, domroles => 1},
242: instselfcreatecheck => {institutiononly => 1},
243: instuserrules => {remote => 1, enroll => 1, reqcrs => 1, domroles => 1},
244: keys => {remote => 1,},
245: load => {anywhere => 1},
246: log => {anywhere => 1},
247: ls => {remote => 1, enroll => 1, content => 1,},
248: ls2 => {remote => 1, enroll => 1, content => 1,},
249: ls3 => {remote => 1, enroll => 1, content => 1,},
250: makeuser => {remote => 1, enroll => 1, domroles => 1,},
251: mkdiruserfile => {remote => 1, enroll => 1,},
252: newput => {remote => 1, enroll => 1, reqcrs => 1, domroles => 1,},
253: passwd => {remote => 1},
254: ping => {anywhere => 1},
255: pong => {anywhere => 1},
256: pushfile => {manageronly => 1},
257: put => {remote => 1, enroll => 1, domroles => 1, msg => 1, content => 1, shared => 1},
258: putdom => {remote => 1, domroles => 1,},
259: putstore => {remote => 1, enroll => 1},
260: queryreply => {anywhere => 1},
261: querysend => {anywhere => 1},
262: quit => {anywhere => 1},
263: readlonnetglobal => {institutiononly => 1},
264: reinit => {manageronly => 1}, #not used currently
265: removeuserfile => {remote => 1, enroll => 1},
266: renameuserfile => {remote => 1,},
267: restore => {remote => 1, enroll => 1, reqcrs => 1,},
268: rolesdel => {remote => 1, enroll => 1, domroles => 1, coaurem => 1},
269: rolesput => {remote => 1, enroll => 1, domroles => 1, coaurem => 1},
270: serverdistarch => {manageronly => 1},
271: serverhomeID => {anywhere => 1},
272: serverloncaparev => {anywhere => 1},
273: servertimezone => {remote => 1, enroll => 1},
274: setannounce => {remote => 1, domroles => 1},
275: sethost => {anywhere => 1},
276: store => {remote => 1, enroll => 1, reqcrs => 1,},
277: studentphoto => {remote => 1, enroll => 1},
278: sub => {content => 1,},
279: tmpdel => {anywhere => 1},
280: tmpget => {anywhere => 1},
281: tmpput => {anywhere => 1},
282: tokenauthuserfile => {anywhere => 1},
283: unsub => {content => 1,},
284: update => {shared => 1},
285: updateclickers => {remote => 1},
286: userhassession => {anywhere => 1},
287: userload => {anywhere => 1},
288: version => {anywhere => 1}, #not used
289: );
290:
291: #
292: # Statistics that are maintained and dislayed in the status line.
293: #
294: my $Transactions = 0; # Number of attempted transactions.
295: my $Failures = 0; # Number of transcations failed.
296:
297: # ResetStatistics:
298: # Resets the statistics counters:
299: #
300: sub ResetStatistics {
301: $Transactions = 0;
302: $Failures = 0;
303: }
304:
305: #------------------------------------------------------------------------
306: #
307: # LocalConnection
308: # Completes the formation of a locally authenticated connection.
309: # This function will ensure that the 'remote' client is really the
310: # local host. If not, the connection is closed, and the function fails.
311: # If so, initcmd is parsed for the name of a file containing the
312: # IDEA session key. The fie is opened, read, deleted and the session
313: # key returned to the caller.
314: #
315: # Parameters:
316: # $Socket - Socket open on client.
317: # $initcmd - The full text of the init command.
318: #
319: # Returns:
320: # IDEA session key on success.
321: # undef on failure.
322: #
323: sub LocalConnection {
324: my ($Socket, $initcmd) = @_;
325: Debug("Attempting local connection: $initcmd client: $clientip");
326: if($clientip ne "127.0.0.1") {
327: &logthis('<font color="red"> LocalConnection rejecting non local: '
328: ."$clientip ne 127.0.0.1 </font>");
329: close $Socket;
330: return undef;
331: } else {
332: chomp($initcmd); # Get rid of \n in filename.
333: my ($init, $type, $name) = split(/:/, $initcmd);
334: Debug(" Init command: $init $type $name ");
335:
336: # Require that $init = init, and $type = local: Otherwise
337: # the caller is insane:
338:
339: if(($init ne "init") && ($type ne "local")) {
340: &logthis('<font color = "red"> LocalConnection: caller is insane! '
341: ."init = $init, and type = $type </font>");
342: close($Socket);;
343: return undef;
344:
345: }
346: # Now get the key filename:
347:
348: my $IDEAKey = lonlocal::ReadKeyFile($name);
349: return $IDEAKey;
350: }
351: }
352: #------------------------------------------------------------------------------
353: #
354: # SSLConnection
355: # Completes the formation of an ssh authenticated connection. The
356: # socket is promoted to an ssl socket. If this promotion and the associated
357: # certificate exchange are successful, the IDEA key is generated and sent
358: # to the remote peer via the SSL tunnel. The IDEA key is also returned to
359: # the caller after the SSL tunnel is torn down.
360: #
361: # Parameters:
362: # Name Type Purpose
363: # $Socket IO::Socket::INET Plaintext socket.
364: #
365: # Returns:
366: # IDEA key on success.
367: # undef on failure.
368: #
369: sub SSLConnection {
370: my $Socket = shift;
371:
372: Debug("SSLConnection: ");
373: my $KeyFile = lonssl::KeyFile();
374: if(!$KeyFile) {
375: my $err = lonssl::LastError();
376: &logthis("<font color=\"red\"> CRITICAL"
377: ."Can't get key file $err </font>");
378: return undef;
379: }
380: my ($CACertificate,
381: $Certificate) = lonssl::CertificateFile();
382:
383:
384: # If any of the key, certificate or certificate authority
385: # certificate filenames are not defined, this can't work.
386:
387: if((!$Certificate) || (!$CACertificate)) {
388: my $err = lonssl::LastError();
389: &logthis("<font color=\"red\"> CRITICAL"
390: ."Can't get certificates: $err </font>");
391:
392: return undef;
393: }
394: Debug("Key: $KeyFile CA: $CACertificate Cert: $Certificate");
395:
396: # Indicate to our peer that we can procede with
397: # a transition to ssl authentication:
398:
399: print $Socket "ok:ssl\n";
400:
401: Debug("Approving promotion -> ssl");
402: # And do so:
403:
404: my $SSLSocket = lonssl::PromoteServerSocket($Socket,
405: $CACertificate,
406: $Certificate,
407: $KeyFile);
408: if(! ($SSLSocket) ) { # SSL socket promotion failed.
409: my $err = lonssl::LastError();
410: &logthis("<font color=\"red\"> CRITICAL "
411: ."SSL Socket promotion failed: $err </font>");
412: return undef;
413: }
414: Debug("SSL Promotion successful");
415:
416: #
417: # The only thing we'll use the socket for is to send the IDEA key
418: # to the peer:
419:
420: my $Key = lonlocal::CreateCipherKey();
421: print $SSLSocket "$Key\n";
422:
423: lonssl::Close($SSLSocket);
424:
425: Debug("Key exchange complete: $Key");
426:
427: return $Key;
428: }
429: #
430: # InsecureConnection:
431: # If insecure connections are allowd,
432: # exchange a challenge with the client to 'validate' the
433: # client (not really, but that's the protocol):
434: # We produce a challenge string that's sent to the client.
435: # The client must then echo the challenge verbatim to us.
436: #
437: # Parameter:
438: # Socket - Socket open on the client.
439: # Returns:
440: # 1 - success.
441: # 0 - failure (e.g.mismatch or insecure not allowed).
442: #
443: sub InsecureConnection {
444: my $Socket = shift;
445:
446: # Don't even start if insecure connections are not allowed.
447:
448: if(! $perlvar{londAllowInsecure}) { # Insecure connections not allowed.
449: return 0;
450: }
451:
452: # Fabricate a challenge string and send it..
453:
454: my $challenge = "$$".time; # pid + time.
455: print $Socket "$challenge\n";
456: &status("Waiting for challenge reply");
457:
458: my $answer = <$Socket>;
459: $answer =~s/\W//g;
460: if($challenge eq $answer) {
461: return 1;
462: } else {
463: logthis("<font color='blue'>WARNING client did not respond to challenge</font>");
464: &status("No challenge reqply");
465: return 0;
466: }
467:
468:
469: }
470: #
471: # Safely execute a command (as long as it's not a shel command and doesn
472: # not require/rely on shell escapes. The function operates by doing a
473: # a pipe based fork and capturing stdout and stderr from the pipe.
474: #
475: # Formal Parameters:
476: # $line - A line of text to be executed as a command.
477: # Returns:
478: # The output from that command. If the output is multiline the caller
479: # must know how to split up the output.
480: #
481: #
482: sub execute_command {
483: my ($line) = @_;
484: my @words = split(/\s/, $line); # Bust the command up into words.
485: my $output = "";
486:
487: my $pid = open(CHILD, "-|");
488:
489: if($pid) { # Parent process
490: Debug("In parent process for execute_command");
491: my @data = <CHILD>; # Read the child's outupt...
492: close CHILD;
493: foreach my $output_line (@data) {
494: Debug("Adding $output_line");
495: $output .= $output_line; # Presumably has a \n on it.
496: }
497:
498: } else { # Child process
499: close (STDERR);
500: open (STDERR, ">&STDOUT");# Combine stderr, and stdout...
501: exec(@words); # won't return.
502: }
503: return $output;
504: }
505:
506:
507: # GetCertificate: Given a transaction that requires a certificate,
508: # this function will extract the certificate from the transaction
509: # request. Note that at this point, the only concept of a certificate
510: # is the hostname to which we are connected.
511: #
512: # Parameter:
513: # request - The request sent by our client (this parameterization may
514: # need to change when we really use a certificate granting
515: # authority.
516: #
517: sub GetCertificate {
518: my $request = shift;
519:
520: return $clientip;
521: }
522:
523: #
524: # Return true if client is a manager.
525: #
526: sub isManager {
527: return (($ConnectionType eq "manager") || ($ConnectionType eq "both"));
528: }
529: #
530: # Return tru if client can do client functions
531: #
532: sub isClient {
533: return (($ConnectionType eq "client") || ($ConnectionType eq "both"));
534: }
535:
536:
537: #
538: # ReadManagerTable: Reads in the current manager table. For now this is
539: # done on each manager authentication because:
540: # - These authentications are not frequent
541: # - This allows dynamic changes to the manager table
542: # without the need to signal to the lond.
543: #
544: sub ReadManagerTable {
545:
546: &Debug("Reading manager table");
547: # Clean out the old table first..
548:
549: foreach my $key (keys %managers) {
550: delete $managers{$key};
551: }
552:
553: my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
554: if (!open (MANAGERS, $tablename)) {
555: my $hostname = &Apache::lonnet::hostname($perlvar{'lonHostID'});
556: if (&Apache::lonnet::is_LC_dns($hostname)) {
557: &logthis('<font color="red">No manager table. Nobody can manage!!</font>');
558: }
559: return;
560: }
561: while(my $host = <MANAGERS>) {
562: chomp($host);
563: if ($host =~ "^#") { # Comment line.
564: next;
565: }
566: if (!defined &Apache::lonnet::get_host_ip($host)) { # This is a non cluster member
567: # The entry is of the form:
568: # cluname:hostname
569: # cluname - A 'cluster hostname' is needed in order to negotiate
570: # the host key.
571: # hostname- The dns name of the host.
572: #
573: my($cluname, $dnsname) = split(/:/, $host);
574:
575: my $ip = gethostbyname($dnsname);
576: if(defined($ip)) { # bad names don't deserve entry.
577: my $hostip = inet_ntoa($ip);
578: $managers{$hostip} = $cluname;
579: logthis('<font color="green"> registering manager '.
580: "$dnsname as $cluname with $hostip </font>\n");
581: }
582: } else {
583: logthis('<font color="green"> existing host'." $host</font>\n");
584: $managers{&Apache::lonnet::get_host_ip($host)} = $host; # Use info from cluster tab if cluster memeber
585: }
586: }
587: }
588:
589: #
590: # ValidManager: Determines if a given certificate represents a valid manager.
591: # in this primitive implementation, the 'certificate' is
592: # just the connecting loncapa client name. This is checked
593: # against a valid client list in the configuration.
594: #
595: #
596: sub ValidManager {
597: my $certificate = shift;
598:
599: return isManager;
600: }
601: #
602: # CopyFile: Called as part of the process of installing a
603: # new configuration file. This function copies an existing
604: # file to a backup file.
605: # Parameters:
606: # oldfile - Name of the file to backup.
607: # newfile - Name of the backup file.
608: # Return:
609: # 0 - Failure (errno has failure reason).
610: # 1 - Success.
611: #
612: sub CopyFile {
613:
614: my ($oldfile, $newfile) = @_;
615:
616: if (! copy($oldfile,$newfile)) {
617: return 0;
618: }
619: chmod(0660, $newfile);
620: return 1;
621: }
622: #
623: # Host files are passed out with externally visible host IPs.
624: # If, for example, we are behind a fire-wall or NAT host, our
625: # internally visible IP may be different than the externally
626: # visible IP. Therefore, we always adjust the contents of the
627: # host file so that the entry for ME is the IP that we believe
628: # we have. At present, this is defined as the entry that
629: # DNS has for us. If by some chance we are not able to get a
630: # DNS translation for us, then we assume that the host.tab file
631: # is correct.
632: # BUGBUGBUG - in the future, we really should see if we can
633: # easily query the interface(s) instead.
634: # Parameter(s):
635: # contents - The contents of the host.tab to check.
636: # Returns:
637: # newcontents - The adjusted contents.
638: #
639: #
640: sub AdjustHostContents {
641: my $contents = shift;
642: my $adjusted;
643: my $me = $perlvar{'lonHostID'};
644:
645: foreach my $line (split(/\n/,$contents)) {
646: if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/) ||
647: ($line =~ /^\s*\^/))) {
648: chomp($line);
649: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
650: if ($id eq $me) {
651: my $ip = gethostbyname($name);
652: my $ipnew = inet_ntoa($ip);
653: $ip = $ipnew;
654: # Reconstruct the host line and append to adjusted:
655:
656: my $newline = "$id:$domain:$role:$name:$ip";
657: if($maxcon ne "") { # Not all hosts have loncnew tuning params
658: $newline .= ":$maxcon:$idleto:$mincon";
659: }
660: $adjusted .= $newline."\n";
661:
662: } else { # Not me, pass unmodified.
663: $adjusted .= $line."\n";
664: }
665: } else { # Blank or comment never re-written.
666: $adjusted .= $line."\n"; # Pass blanks and comments as is.
667: }
668: }
669: return $adjusted;
670: }
671: #
672: # InstallFile: Called to install an administrative file:
673: # - The file is created int a temp directory called <name>.tmp
674: # - lcinstall file is called to install the file.
675: # since the web app has no direct write access to the table directory
676: #
677: # Parameters:
678: # Name of the file
679: # File Contents.
680: # Return:
681: # nonzero - success.
682: # 0 - failure and $! has an errno.
683: # Assumptions:
684: # File installtion is a relatively infrequent
685: #
686: sub InstallFile {
687:
688: my ($Filename, $Contents) = @_;
689: # my $TempFile = $Filename.".tmp";
690: my $exedir = $perlvar{'lonDaemons'};
691: my $tmpdir = $exedir.'/tmp/';
692: my $TempFile = $tmpdir."TempTableFile.tmp";
693:
694: # Open the file for write:
695:
696: my $fh = IO::File->new("> $TempFile"); # Write to temp.
697: if(!(defined $fh)) {
698: &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
699: return 0;
700: }
701: # write the contents of the file:
702:
703: print $fh ($Contents);
704: $fh->close; # In case we ever have a filesystem w. locking
705:
706: chmod(0664, $TempFile); # Everyone can write it.
707:
708: # Use lcinstall file to put the file in the table directory...
709:
710: &Debug("Opening pipe to $exedir/lcinstallfile $TempFile $Filename");
711: my $pf = IO::File->new("| $exedir/lcinstallfile $TempFile $Filename > $exedir/logs/lcinstallfile.log");
712: close $pf;
713: my $err = $?;
714: &Debug("Status is $err");
715: if ($err != 0) {
716: my $msg = $err;
717: if ($err < @installerrors) {
718: $msg = $installerrors[$err];
719: }
720: &logthis("Install failed for table file $Filename : $msg");
721: return 0;
722: }
723:
724: # Remove the temp file:
725:
726: unlink($TempFile);
727:
728: return 1;
729: }
730:
731:
732: #
733: # ConfigFileFromSelector: converts a configuration file selector
734: # into a configuration file pathname.
735: # Supports the following file selectors:
736: # hosts, domain, dns_hosts, dns_domain
737: #
738: #
739: # Parameters:
740: # selector - Configuration file selector.
741: # Returns:
742: # Full path to the file or undef if the selector is invalid.
743: #
744: sub ConfigFileFromSelector {
745: my $selector = shift;
746: my $tablefile;
747:
748: my $tabledir = $perlvar{'lonTabDir'}.'/';
749: if (($selector eq "hosts") || ($selector eq "domain") ||
750: ($selector eq "dns_hosts") || ($selector eq "dns_domain")) {
751: $tablefile = $tabledir.$selector.'.tab';
752: }
753: return $tablefile;
754: }
755: #
756: # PushFile: Called to do an administrative push of a file.
757: # - Ensure the file being pushed is one we support.
758: # - Backup the old file to <filename.saved>
759: # - Separate the contents of the new file out from the
760: # rest of the request.
761: # - Write the new file.
762: # Parameter:
763: # Request - The entire user request. This consists of a : separated
764: # string pushfile:tablename:contents.
765: # NOTE: The contents may have :'s in it as well making things a bit
766: # more interesting... but not much.
767: # Returns:
768: # String to send to client ("ok" or "refused" if bad file).
769: #
770: sub PushFile {
771: my $request = shift;
772: my ($command, $filename, $contents) = split(":", $request, 3);
773: &Debug("PushFile");
774:
775: # At this point in time, pushes for only the following tables are
776: # supported:
777: # hosts.tab ($filename eq host).
778: # domain.tab ($filename eq domain).
779: # dns_hosts.tab ($filename eq dns_host).
780: # dns_domain.tab ($filename eq dns_domain).
781: # Construct the destination filename or reject the request.
782: #
783: # lonManage is supposed to ensure this, however this session could be
784: # part of some elaborate spoof that managed somehow to authenticate.
785: #
786:
787:
788: my $tablefile = ConfigFileFromSelector($filename);
789: if(! (defined $tablefile)) {
790: return "refused";
791: }
792:
793: # If the file being pushed is the host file, we adjust the entry for ourself so that the
794: # IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible
795: # to conceive of conditions where we don't have a DNS entry locally. This is possible in a
796: # network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
797: # that possibilty.
798:
799: if($filename eq "host") {
800: $contents = AdjustHostContents($contents);
801: } elsif ($filename eq 'dns_host' || $filename eq 'dns_domain') {
802: if ($contents eq '') {
803: &logthis('<font color="red"> Pushfile: unable to install '
804: .$tablefile." - no data received from push. </font>");
805: return 'error: push had no data';
806: }
807: if (&Apache::lonnet::get_host_ip($clientname)) {
808: my $clienthost = &Apache::lonnet::hostname($clientname);
809: if ($managers{$clientip} eq $clientname) {
810: my $clientprotocol = $Apache::lonnet::protocol{$clientname};
811: $clientprotocol = 'http' if ($clientprotocol ne 'https');
812: my $url = '/adm/'.$filename;
813: $url =~ s{_}{/};
814: my $request=new HTTP::Request('GET',"$clientprotocol://$clienthost$url");
815: my $response = LONCAPA::LWPReq::makerequest($clientname,$request,'',\%perlvar,60,0);
816: if ($response->is_error()) {
817: &logthis('<font color="red"> Pushfile: unable to install '
818: .$tablefile." - error attempting to pull data. </font>");
819: return 'error: pull failed';
820: } else {
821: my $result = $response->content;
822: chomp($result);
823: unless ($result eq $contents) {
824: &logthis('<font color="red"> Pushfile: unable to install '
825: .$tablefile." - pushed data and pulled data differ. </font>");
826: my $pushleng = length($contents);
827: my $pullleng = length($result);
828: if ($pushleng != $pullleng) {
829: return "error: $pushleng vs $pullleng bytes";
830: } else {
831: return "error: mismatch push and pull";
832: }
833: }
834: }
835: }
836: }
837: }
838:
839: # Install the new file:
840:
841: &logthis("Installing new $tablefile contents:\n$contents");
842: if(!InstallFile($tablefile, $contents)) {
843: &logthis('<font color="red"> Pushfile: unable to install '
844: .$tablefile." $! </font>");
845: return "error:$!";
846: } else {
847: &logthis('<font color="green"> Installed new '.$tablefile
848: ." - transaction by: $clientname ($clientip)</font>");
849: my $adminmail = $perlvar{'lonAdmEMail'};
850: my $admindom = &Apache::lonnet::host_domain($perlvar{'lonHostID'});
851: if ($admindom ne '') {
852: my %domconfig =
853: &Apache::lonnet::get_dom('configuration',['contacts'],$admindom);
854: if (ref($domconfig{'contacts'}) eq 'HASH') {
855: if ($domconfig{'contacts'}{'adminemail'} ne '') {
856: $adminmail = $domconfig{'contacts'}{'adminemail'};
857: }
858: }
859: }
860: if ($adminmail =~ /^[^\@]+\@[^\@]+$/) {
861: my $msg = new Mail::Send;
862: $msg->to($adminmail);
863: $msg->subject('LON-CAPA DNS update on '.$perlvar{'lonHostID'});
864: $msg->add('Content-type','text/plain; charset=UTF-8');
865: if (my $fh = $msg->open()) {
866: print $fh 'Update to '.$tablefile.' from Cluster Manager '.
867: "$clientname ($clientip)\n";
868: $fh->close;
869: }
870: }
871: }
872:
873: # Indicate success:
874:
875: return "ok";
876:
877: }
878:
879: #
880: # Called to re-init either lonc or lond.
881: #
882: # Parameters:
883: # request - The full request by the client. This is of the form
884: # reinit:<process>
885: # where <process> is allowed to be either of
886: # lonc or lond
887: #
888: # Returns:
889: # The string to be sent back to the client either:
890: # ok - Everything worked just fine.
891: # error:why - There was a failure and why describes the reason.
892: #
893: #
894: sub ReinitProcess {
895: my $request = shift;
896:
897:
898: # separate the request (reinit) from the process identifier and
899: # validate it producing the name of the .pid file for the process.
900: #
901: #
902: my ($junk, $process) = split(":", $request);
903: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
904: if($process eq 'lonc') {
905: $processpidfile = $processpidfile."lonc.pid";
906: if (!open(PIDFILE, "< $processpidfile")) {
907: return "error:Open failed for $processpidfile";
908: }
909: my $loncpid = <PIDFILE>;
910: close(PIDFILE);
911: logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
912: ."</font>");
913: kill("USR2", $loncpid);
914: } elsif ($process eq 'lond') {
915: logthis('<font color="red"> Reinitializing self (lond) </font>');
916: &UpdateHosts; # Lond is us!!
917: } else {
918: &logthis('<font color="yellow" Invalid reinit request for '.$process
919: ."</font>");
920: return "error:Invalid process identifier $process";
921: }
922: return 'ok';
923: }
924: # Validate a line in a configuration file edit script:
925: # Validation includes:
926: # - Ensuring the command is valid.
927: # - Ensuring the command has sufficient parameters
928: # Parameters:
929: # scriptline - A line to validate (\n has been stripped for what it's worth).
930: #
931: # Return:
932: # 0 - Invalid scriptline.
933: # 1 - Valid scriptline
934: # NOTE:
935: # Only the command syntax is checked, not the executability of the
936: # command.
937: #
938: sub isValidEditCommand {
939: my $scriptline = shift;
940:
941: # Line elements are pipe separated:
942:
943: my ($command, $key, $newline) = split(/\|/, $scriptline);
944: &logthis('<font color="green"> isValideditCommand checking: '.
945: "Command = '$command', Key = '$key', Newline = '$newline' </font>\n");
946:
947: if ($command eq "delete") {
948: #
949: # key with no newline.
950: #
951: if( ($key eq "") || ($newline ne "")) {
952: return 0; # Must have key but no newline.
953: } else {
954: return 1; # Valid syntax.
955: }
956: } elsif ($command eq "replace") {
957: #
958: # key and newline:
959: #
960: if (($key eq "") || ($newline eq "")) {
961: return 0;
962: } else {
963: return 1;
964: }
965: } elsif ($command eq "append") {
966: if (($key ne "") && ($newline eq "")) {
967: return 1;
968: } else {
969: return 0;
970: }
971: } else {
972: return 0; # Invalid command.
973: }
974: return 0; # Should not get here!!!
975: }
976: #
977: # ApplyEdit - Applies an edit command to a line in a configuration
978: # file. It is the caller's responsiblity to validate the
979: # edit line.
980: # Parameters:
981: # $directive - A single edit directive to apply.
982: # Edit directives are of the form:
983: # append|newline - Appends a new line to the file.
984: # replace|key|newline - Replaces the line with key value 'key'
985: # delete|key - Deletes the line with key value 'key'.
986: # $editor - A config file editor object that contains the
987: # file being edited.
988: #
989: sub ApplyEdit {
990:
991: my ($directive, $editor) = @_;
992:
993: # Break the directive down into its command and its parameters
994: # (at most two at this point. The meaning of the parameters, if in fact
995: # they exist depends on the command).
996:
997: my ($command, $p1, $p2) = split(/\|/, $directive);
998:
999: if($command eq "append") {
1000: $editor->Append($p1); # p1 - key p2 null.
1001: } elsif ($command eq "replace") {
1002: $editor->ReplaceLine($p1, $p2); # p1 - key p2 = newline.
1003: } elsif ($command eq "delete") {
1004: $editor->DeleteLine($p1); # p1 - key p2 null.
1005: } else { # Should not get here!!!
1006: die "Invalid command given to ApplyEdit $command"
1007: }
1008: }
1009: #
1010: # AdjustOurHost:
1011: # Adjusts a host file stored in a configuration file editor object
1012: # for the true IP address of this host. This is necessary for hosts
1013: # that live behind a firewall.
1014: # Those hosts have a publicly distributed IP of the firewall, but
1015: # internally must use their actual IP. We assume that a given
1016: # host only has a single IP interface for now.
1017: # Formal Parameters:
1018: # editor - The configuration file editor to adjust. This
1019: # editor is assumed to contain a hosts.tab file.
1020: # Strategy:
1021: # - Figure out our hostname.
1022: # - Lookup the entry for this host.
1023: # - Modify the line to contain our IP
1024: # - Do a replace for this host.
1025: sub AdjustOurHost {
1026: my $editor = shift;
1027:
1028: # figure out who I am.
1029:
1030: my $myHostName = $perlvar{'lonHostID'}; # LonCAPA hostname.
1031:
1032: # Get my host file entry.
1033:
1034: my $ConfigLine = $editor->Find($myHostName);
1035: if(! (defined $ConfigLine)) {
1036: die "AdjustOurHost - no entry for me in hosts file $myHostName";
1037: }
1038: # figure out my IP:
1039: # Use the config line to get my hostname.
1040: # Use gethostbyname to translate that into an IP address.
1041: #
1042: my ($id,$domain,$role,$name,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);
1043: #
1044: # Reassemble the config line from the elements in the list.
1045: # Note that if the loncnew items were not present before, they will
1046: # be now even if they would be empty
1047: #
1048: my $newConfigLine = $id;
1049: foreach my $item ($domain, $role, $name, $maxcon, $idleto, $mincon) {
1050: $newConfigLine .= ":".$item;
1051: }
1052: # Replace the line:
1053:
1054: $editor->ReplaceLine($id, $newConfigLine);
1055:
1056: }
1057: #
1058: # ReplaceConfigFile:
1059: # Replaces a configuration file with the contents of a
1060: # configuration file editor object.
1061: # This is done by:
1062: # - Copying the target file to <filename>.old
1063: # - Writing the new file to <filename>.tmp
1064: # - Moving <filename.tmp> -> <filename>
1065: # This laborious process ensures that the system is never without
1066: # a configuration file that's at least valid (even if the contents
1067: # may be dated).
1068: # Parameters:
1069: # filename - Name of the file to modify... this is a full path.
1070: # editor - Editor containing the file.
1071: #
1072: sub ReplaceConfigFile {
1073:
1074: my ($filename, $editor) = @_;
1075:
1076: CopyFile ($filename, $filename.".old");
1077:
1078: my $contents = $editor->Get(); # Get the contents of the file.
1079:
1080: InstallFile($filename, $contents);
1081: }
1082: #
1083: #
1084: # Called to edit a configuration table file
1085: # Parameters:
1086: # request - The entire command/request sent by lonc or lonManage
1087: # Return:
1088: # The reply to send to the client.
1089: #
1090: sub EditFile {
1091: my $request = shift;
1092:
1093: # Split the command into it's pieces: edit:filetype:script
1094:
1095: my ($cmd, $filetype, $script) = split(/:/, $request,3); # : in script
1096:
1097: # Check the pre-coditions for success:
1098:
1099: if($cmd != "edit") { # Something is amiss afoot alack.
1100: return "error:edit request detected, but request != 'edit'\n";
1101: }
1102: if( ($filetype ne "hosts") &&
1103: ($filetype ne "domain")) {
1104: return "error:edit requested with invalid file specifier: $filetype \n";
1105: }
1106:
1107: # Split the edit script and check it's validity.
1108:
1109: my @scriptlines = split(/\n/, $script); # one line per element.
1110: my $linecount = scalar(@scriptlines);
1111: for(my $i = 0; $i < $linecount; $i++) {
1112: chomp($scriptlines[$i]);
1113: if(!isValidEditCommand($scriptlines[$i])) {
1114: return "error:edit with bad script line: '$scriptlines[$i]' \n";
1115: }
1116: }
1117:
1118: # Execute the edit operation.
1119: # - Create a config file editor for the appropriate file and
1120: # - execute each command in the script:
1121: #
1122: my $configfile = ConfigFileFromSelector($filetype);
1123: if (!(defined $configfile)) {
1124: return "refused\n";
1125: }
1126: my $editor = ConfigFileEdit->new($configfile);
1127:
1128: for (my $i = 0; $i < $linecount; $i++) {
1129: ApplyEdit($scriptlines[$i], $editor);
1130: }
1131: # If the file is the host file, ensure that our host is
1132: # adjusted to have our ip:
1133: #
1134: if($filetype eq "host") {
1135: AdjustOurHost($editor);
1136: }
1137: # Finally replace the current file with our file.
1138: #
1139: ReplaceConfigFile($configfile, $editor);
1140:
1141: return "ok\n";
1142: }
1143:
1144: # read_profile
1145: #
1146: # Returns a set of specific entries from a user's profile file.
1147: # this is a utility function that is used by both get_profile_entry and
1148: # get_profile_entry_encrypted.
1149: #
1150: # Parameters:
1151: # udom - Domain in which the user exists.
1152: # uname - User's account name (loncapa account)
1153: # namespace - The profile namespace to open.
1154: # what - A set of & separated queries.
1155: # Returns:
1156: # If all ok: - The string that needs to be shipped back to the user.
1157: # If failure - A string that starts with error: followed by the failure
1158: # reason.. note that this probabyl gets shipped back to the
1159: # user as well.
1160: #
1161: sub read_profile {
1162: my ($udom, $uname, $namespace, $what) = @_;
1163:
1164: my $hashref = &tie_user_hash($udom, $uname, $namespace,
1165: &GDBM_READER());
1166: if ($hashref) {
1167: my @queries=split(/\&/,$what);
1168: if ($namespace eq 'roles') {
1169: @queries = map { &unescape($_); } @queries;
1170: }
1171: my $qresult='';
1172:
1173: for (my $i=0;$i<=$#queries;$i++) {
1174: $qresult.="$hashref->{$queries[$i]}&"; # Presumably failure gives empty string.
1175: }
1176: $qresult=~s/\&$//; # Remove trailing & from last lookup.
1177: if (&untie_user_hash($hashref)) {
1178: return $qresult;
1179: } else {
1180: return "error: ".($!+0)." untie (GDBM) Failed";
1181: }
1182: } else {
1183: if ($!+0 == 2) {
1184: return "error:No such file or GDBM reported bad block error";
1185: } else {
1186: return "error: ".($!+0)." tie (GDBM) Failed";
1187: }
1188: }
1189:
1190: }
1191: #--------------------- Request Handlers --------------------------------------------
1192: #
1193: # By convention each request handler registers itself prior to the sub
1194: # declaration:
1195: #
1196:
1197: #++
1198: #
1199: # Handles ping requests.
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: # Implicit Inputs:
1205: # $currenthostid - Global variable that carries the name of the host we are
1206: # known as.
1207: # Returns:
1208: # 1 - Ok to continue processing.
1209: # 0 - Program should exit.
1210: # Side effects:
1211: # Reply information is sent to the client.
1212: sub ping_handler {
1213: my ($cmd, $tail, $client) = @_;
1214: Debug("$cmd $tail $client .. $currenthostid:");
1215:
1216: Reply( $client,\$currenthostid,"$cmd:$tail");
1217:
1218: return 1;
1219: }
1220: ®ister_handler("ping", \&ping_handler, 0, 1, 1); # Ping unencoded, client or manager.
1221:
1222: #++
1223: #
1224: # Handles pong requests. Pong replies with our current host id, and
1225: # the results of a ping sent to us via our lonc.
1226: #
1227: # Parameters:
1228: # $cmd - the actual keyword that invoked us.
1229: # $tail - the tail of the request that invoked us.
1230: # $replyfd- File descriptor connected to the client
1231: # Implicit Inputs:
1232: # $currenthostid - Global variable that carries the name of the host we are
1233: # connected to.
1234: # Returns:
1235: # 1 - Ok to continue processing.
1236: # 0 - Program should exit.
1237: # Side effects:
1238: # Reply information is sent to the client.
1239: sub pong_handler {
1240: my ($cmd, $tail, $replyfd) = @_;
1241:
1242: my $reply=&Apache::lonnet::reply("ping",$clientname);
1243: &Reply( $replyfd, "$currenthostid:$reply\n", "$cmd:$tail");
1244: return 1;
1245: }
1246: ®ister_handler("pong", \&pong_handler, 0, 1, 1); # Pong unencoded, client or manager
1247:
1248: #++
1249: # Called to establish an encrypted session key with the remote client.
1250: # Note that with secure lond, in most cases this function is never
1251: # invoked. Instead, the secure session key is established either
1252: # via a local file that's locked down tight and only lives for a short
1253: # time, or via an ssl tunnel...and is generated from a bunch-o-random
1254: # bits from /dev/urandom, rather than the predictable pattern used by
1255: # by this sub. This sub is only used in the old-style insecure
1256: # key negotiation.
1257: # Parameters:
1258: # $cmd - the actual keyword that invoked us.
1259: # $tail - the tail of the request that invoked us.
1260: # $replyfd- File descriptor connected to the client
1261: # Implicit Inputs:
1262: # $currenthostid - Global variable that carries the name of the host
1263: # known as.
1264: # $clientname - Global variable that carries the name of the host we're connected to.
1265: # Returns:
1266: # 1 - Ok to continue processing.
1267: # 0 - Program should exit.
1268: # Implicit Outputs:
1269: # Reply information is sent to the client.
1270: # $cipher is set with a reference to a new IDEA encryption object.
1271: #
1272: sub establish_key_handler {
1273: my ($cmd, $tail, $replyfd) = @_;
1274:
1275: my $buildkey=time.$$.int(rand 100000);
1276: $buildkey=~tr/1-6/A-F/;
1277: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
1278: my $key=$currenthostid.$clientname;
1279: $key=~tr/a-z/A-Z/;
1280: $key=~tr/G-P/0-9/;
1281: $key=~tr/Q-Z/0-9/;
1282: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
1283: $key=substr($key,0,32);
1284: my $cipherkey=pack("H32",$key);
1285: $cipher=new IDEA $cipherkey;
1286: &Reply($replyfd, \$buildkey, "$cmd:$tail");
1287:
1288: return 1;
1289:
1290: }
1291: ®ister_handler("ekey", \&establish_key_handler, 0, 1,1);
1292:
1293: # Handler for the load command. Returns the current system load average
1294: # to the requestor.
1295: #
1296: # Parameters:
1297: # $cmd - the actual keyword that invoked us.
1298: # $tail - the tail of the request that invoked us.
1299: # $replyfd- File descriptor connected to the client
1300: # Implicit Inputs:
1301: # $currenthostid - Global variable that carries the name of the host
1302: # known as.
1303: # $clientname - Global variable that carries the name of the host we're connected to.
1304: # Returns:
1305: # 1 - Ok to continue processing.
1306: # 0 - Program should exit.
1307: # Side effects:
1308: # Reply information is sent to the client.
1309: sub load_handler {
1310: my ($cmd, $tail, $replyfd) = @_;
1311:
1312:
1313:
1314: # Get the load average from /proc/loadavg and calculate it as a percentage of
1315: # the allowed load limit as set by the perl global variable lonLoadLim
1316:
1317: my $loadavg;
1318: my $loadfile=IO::File->new('/proc/loadavg');
1319:
1320: $loadavg=<$loadfile>;
1321: $loadavg =~ s/\s.*//g; # Extract the first field only.
1322:
1323: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1324:
1325: &Reply( $replyfd, \$loadpercent, "$cmd:$tail");
1326:
1327: return 1;
1328: }
1329: ®ister_handler("load", \&load_handler, 0, 1, 0);
1330:
1331: #
1332: # Process the userload request. This sub returns to the client the current
1333: # user load average. It can be invoked either by clients or managers.
1334: #
1335: # Parameters:
1336: # $cmd - the actual keyword that invoked us.
1337: # $tail - the tail of the request that invoked us.
1338: # $replyfd- File descriptor connected to the client
1339: # Implicit Inputs:
1340: # $currenthostid - Global variable that carries the name of the host
1341: # known as.
1342: # $clientname - Global variable that carries the name of the host we're connected to.
1343: # Returns:
1344: # 1 - Ok to continue processing.
1345: # 0 - Program should exit
1346: # Implicit inputs:
1347: # whatever the userload() function requires.
1348: # Implicit outputs:
1349: # the reply is written to the client.
1350: #
1351: sub user_load_handler {
1352: my ($cmd, $tail, $replyfd) = @_;
1353:
1354: my $userloadpercent=&Apache::lonnet::userload();
1355: &Reply($replyfd, \$userloadpercent, "$cmd:$tail");
1356:
1357: return 1;
1358: }
1359: ®ister_handler("userload", \&user_load_handler, 0, 1, 0);
1360:
1361: # Process a request for the authorization type of a user:
1362: # (userauth).
1363: #
1364: # Parameters:
1365: # $cmd - the actual keyword that invoked us.
1366: # $tail - the tail of the request that invoked us.
1367: # $replyfd- File descriptor connected to the client
1368: # Returns:
1369: # 1 - Ok to continue processing.
1370: # 0 - Program should exit
1371: # Implicit outputs:
1372: # The user authorization type is written to the client.
1373: #
1374: sub user_authorization_type {
1375: my ($cmd, $tail, $replyfd) = @_;
1376:
1377: my $userinput = "$cmd:$tail";
1378:
1379: # Pull the domain and username out of the command tail.
1380: # and call get_auth_type to determine the authentication type.
1381:
1382: my ($udom,$uname)=split(/:/,$tail);
1383: my $result = &get_auth_type($udom, $uname);
1384: if($result eq "nouser") {
1385: &Failure( $replyfd, "unknown_user\n", $userinput);
1386: } else {
1387: #
1388: # We only want to pass the second field from get_auth_type
1389: # for ^krb.. otherwise we'll be handing out the encrypted
1390: # password for internals e.g.
1391: #
1392: my ($type,$otherinfo) = split(/:/,$result);
1393: if($type =~ /^krb/) {
1394: $type = $result;
1395: } else {
1396: $type .= ':';
1397: }
1398: &Reply( $replyfd, \$type, $userinput);
1399: }
1400:
1401: return 1;
1402: }
1403: ®ister_handler("currentauth", \&user_authorization_type, 1, 1, 0);
1404:
1405: # Process a request by a manager to push a hosts or domain table
1406: # to us. We pick apart the command and pass it on to the subs
1407: # that already exist to do this.
1408: #
1409: # Parameters:
1410: # $cmd - the actual keyword that invoked us.
1411: # $tail - the tail of the request that invoked us.
1412: # $client - File descriptor connected to the client
1413: # Returns:
1414: # 1 - Ok to continue processing.
1415: # 0 - Program should exit
1416: # Implicit Output:
1417: # a reply is written to the client.
1418: sub push_file_handler {
1419: my ($cmd, $tail, $client) = @_;
1420: &Debug("In push file handler");
1421: my $userinput = "$cmd:$tail";
1422:
1423: # At this time we only know that the IP of our partner is a valid manager
1424: # the code below is a hook to do further authentication (e.g. to resolve
1425: # spoofing).
1426:
1427: my $cert = &GetCertificate($userinput);
1428: if(&ValidManager($cert)) {
1429: &Debug("Valid manager: $client");
1430:
1431: # Now presumably we have the bona fides of both the peer host and the
1432: # process making the request.
1433:
1434: my $reply = &PushFile($userinput);
1435: &Reply($client, \$reply, $userinput);
1436:
1437: } else {
1438: &logthis("push_file_handler $client is not valid");
1439: &Failure( $client, "refused\n", $userinput);
1440: }
1441: return 1;
1442: }
1443: ®ister_handler("pushfile", \&push_file_handler, 1, 0, 1);
1444:
1445: # The du_handler routine should be considered obsolete and is retained
1446: # for communication with legacy servers. Please see the du2_handler.
1447: #
1448: # du - list the disk usage of a directory recursively.
1449: #
1450: # note: stolen code from the ls file handler
1451: # under construction by Rick Banghart
1452: # .
1453: # Parameters:
1454: # $cmd - The command that dispatched us (du).
1455: # $ududir - The directory path to list... I'm not sure what this
1456: # is relative as things like ls:. return e.g.
1457: # no_such_dir.
1458: # $client - Socket open on the client.
1459: # Returns:
1460: # 1 - indicating that the daemon should not disconnect.
1461: # Side Effects:
1462: # The reply is written to $client.
1463: #
1464: sub du_handler {
1465: my ($cmd, $ududir, $client) = @_;
1466: ($ududir) = split(/:/,$ududir); # Make 'telnet' testing easier.
1467: my $userinput = "$cmd:$ududir";
1468:
1469: if ($ududir=~/\.\./ || $ududir!~m|^/home/httpd/|) {
1470: &Failure($client,"refused\n","$cmd:$ududir");
1471: return 1;
1472: }
1473: # Since $ududir could have some nasties in it,
1474: # we will require that ududir is a valid
1475: # directory. Just in case someone tries to
1476: # slip us a line like .;(cd /home/httpd rm -rf*)
1477: # etc.
1478: #
1479: if (-d $ududir) {
1480: my $total_size=0;
1481: my $code=sub {
1482: if ($_=~/\.\d+\./) { return;}
1483: if ($_=~/\.meta$/) { return;}
1484: if (-d $_) { return;}
1485: $total_size+=(stat($_))[7];
1486: };
1487: chdir($ududir);
1488: find($code,$ududir);
1489: $total_size=int($total_size/1024);
1490: &Reply($client,\$total_size,"$cmd:$ududir");
1491: } else {
1492: &Failure($client, "bad_directory:$ududir\n","$cmd:$ududir");
1493: }
1494: return 1;
1495: }
1496: ®ister_handler("du", \&du_handler, 0, 1, 0);
1497:
1498: # Please also see the du_handler, which is obsoleted by du2.
1499: # du2_handler differs from du_handler in that required path to directory
1500: # provided by &propath() is prepended in the handler instead of on the
1501: # client side.
1502: #
1503: # du2 - list the disk usage of a directory recursively.
1504: #
1505: # Parameters:
1506: # $cmd - The command that dispatched us (du).
1507: # $tail - The tail of the request that invoked us.
1508: # $tail is a : separated list of the following:
1509: # - $ududir - directory path to list (before prepending)
1510: # - $getpropath = 1 if &propath() should prepend
1511: # - $uname - username to use for &propath or user dir
1512: # - $udom - domain to use for &propath or user dir
1513: # All are escaped.
1514: # $client - Socket open on the client.
1515: # Returns:
1516: # 1 - indicating that the daemon should not disconnect.
1517: # Side Effects:
1518: # The reply is written to $client.
1519: #
1520:
1521: sub du2_handler {
1522: my ($cmd, $tail, $client) = @_;
1523: my ($ududir,$getpropath,$uname,$udom) = map { &unescape($_) } (split(/:/, $tail));
1524: my $userinput = "$cmd:$tail";
1525: if (($ududir=~/\.\./) || (($ududir!~m|^/home/httpd/|) && (!$getpropath))) {
1526: &Failure($client,"refused\n","$cmd:$tail");
1527: return 1;
1528: }
1529: if ($getpropath) {
1530: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
1531: $ududir = &propath($udom,$uname).'/'.$ududir;
1532: } else {
1533: &Failure($client,"refused\n","$cmd:$tail");
1534: return 1;
1535: }
1536: }
1537: # Since $ududir could have some nasties in it,
1538: # we will require that ududir is a valid
1539: # directory. Just in case someone tries to
1540: # slip us a line like .;(cd /home/httpd rm -rf*)
1541: # etc.
1542: #
1543: if (-d $ududir) {
1544: my $total_size=0;
1545: my $code=sub {
1546: if ($_=~/\.\d+\./) { return;}
1547: if ($_=~/\.meta$/) { return;}
1548: if (-d $_) { return;}
1549: $total_size+=(stat($_))[7];
1550: };
1551: chdir($ududir);
1552: find($code,$ududir);
1553: $total_size=int($total_size/1024);
1554: &Reply($client,\$total_size,"$cmd:$ududir");
1555: } else {
1556: &Failure($client, "bad_directory:$ududir\n","$cmd:$tail");
1557: }
1558: return 1;
1559: }
1560: ®ister_handler("du2", \&du2_handler, 0, 1, 0);
1561:
1562: #
1563: # The ls_handler routine should be considered obsolete and is retained
1564: # for communication with legacy servers. Please see the ls3_handler.
1565: #
1566: # ls - list the contents of a directory. For each file in the
1567: # selected directory the filename followed by the full output of
1568: # the stat function is returned. The returned info for each
1569: # file are separated by ':'. The stat fields are separated by &'s.
1570: # Parameters:
1571: # $cmd - The command that dispatched us (ls).
1572: # $ulsdir - The directory path to list... I'm not sure what this
1573: # is relative as things like ls:. return e.g.
1574: # no_such_dir.
1575: # $client - Socket open on the client.
1576: # Returns:
1577: # 1 - indicating that the daemon should not disconnect.
1578: # Side Effects:
1579: # The reply is written to $client.
1580: #
1581: sub ls_handler {
1582: # obsoleted by ls2_handler
1583: my ($cmd, $ulsdir, $client) = @_;
1584:
1585: my $userinput = "$cmd:$ulsdir";
1586:
1587: my $obs;
1588: my $rights;
1589: my $ulsout='';
1590: my $ulsfn;
1591: if (-e $ulsdir) {
1592: if(-d $ulsdir) {
1593: if (opendir(LSDIR,$ulsdir)) {
1594: while ($ulsfn=readdir(LSDIR)) {
1595: undef($obs);
1596: undef($rights);
1597: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1598: #We do some obsolete checking here
1599: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1600: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1601: my @obsolete=<FILE>;
1602: foreach my $obsolete (@obsolete) {
1603: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1604: if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
1605: }
1606: }
1607: $ulsout.=$ulsfn.'&'.join('&',@ulsstats);
1608: if($obs eq '1') { $ulsout.="&1"; }
1609: else { $ulsout.="&0"; }
1610: if($rights eq '1') { $ulsout.="&1:"; }
1611: else { $ulsout.="&0:"; }
1612: }
1613: closedir(LSDIR);
1614: }
1615: } else {
1616: my @ulsstats=stat($ulsdir);
1617: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1618: }
1619: } else {
1620: $ulsout='no_such_dir';
1621: }
1622: if ($ulsout eq '') { $ulsout='empty'; }
1623: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1624:
1625: return 1;
1626:
1627: }
1628: ®ister_handler("ls", \&ls_handler, 0, 1, 0);
1629:
1630: # The ls2_handler routine should be considered obsolete and is retained
1631: # for communication with legacy servers. Please see the ls3_handler.
1632: # Please also see the ls_handler, which was itself obsoleted by ls2.
1633: # ls2_handler differs from ls_handler in that it escapes its return
1634: # values before concatenating them together with ':'s.
1635: #
1636: # ls2 - list the contents of a directory. For each file in the
1637: # selected directory the filename followed by the full output of
1638: # the stat function is returned. The returned info for each
1639: # file are separated by ':'. The stat fields are separated by &'s.
1640: # Parameters:
1641: # $cmd - The command that dispatched us (ls).
1642: # $ulsdir - The directory path to list... I'm not sure what this
1643: # is relative as things like ls:. return e.g.
1644: # no_such_dir.
1645: # $client - Socket open on the client.
1646: # Returns:
1647: # 1 - indicating that the daemon should not disconnect.
1648: # Side Effects:
1649: # The reply is written to $client.
1650: #
1651: sub ls2_handler {
1652: my ($cmd, $ulsdir, $client) = @_;
1653:
1654: my $userinput = "$cmd:$ulsdir";
1655:
1656: my $obs;
1657: my $rights;
1658: my $ulsout='';
1659: my $ulsfn;
1660: if (-e $ulsdir) {
1661: if(-d $ulsdir) {
1662: if (opendir(LSDIR,$ulsdir)) {
1663: while ($ulsfn=readdir(LSDIR)) {
1664: undef($obs);
1665: undef($rights);
1666: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1667: #We do some obsolete checking here
1668: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1669: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1670: my @obsolete=<FILE>;
1671: foreach my $obsolete (@obsolete) {
1672: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1673: if($obsolete =~ m|(<copyright>)(default)|) {
1674: $rights = 1;
1675: }
1676: }
1677: }
1678: my $tmp = $ulsfn.'&'.join('&',@ulsstats);
1679: if ($obs eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1680: if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1681: $ulsout.= &escape($tmp).':';
1682: }
1683: closedir(LSDIR);
1684: }
1685: } else {
1686: my @ulsstats=stat($ulsdir);
1687: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1688: }
1689: } else {
1690: $ulsout='no_such_dir';
1691: }
1692: if ($ulsout eq '') { $ulsout='empty'; }
1693: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1694: return 1;
1695: }
1696: ®ister_handler("ls2", \&ls2_handler, 0, 1, 0);
1697: #
1698: # ls3 - list the contents of a directory. For each file in the
1699: # selected directory the filename followed by the full output of
1700: # the stat function is returned. The returned info for each
1701: # file are separated by ':'. The stat fields are separated by &'s.
1702: # Parameters:
1703: # $cmd - The command that dispatched us (ls).
1704: # $tail - The tail of the request that invoked us.
1705: # $tail is a : separated list of the following:
1706: # - $ulsdir - directory path to list (before prepending)
1707: # - $getpropath = 1 if &propath() should prepend
1708: # - $getuserdir = 1 if path to user dir in lonUsers should
1709: # prepend
1710: # - $alternate_root - path to prepend
1711: # - $uname - username to use for &propath or user dir
1712: # - $udom - domain to use for &propath or user dir
1713: # All of these except $getpropath and &getuserdir are escaped.
1714: # no_such_dir.
1715: # $client - Socket open on the client.
1716: # Returns:
1717: # 1 - indicating that the daemon should not disconnect.
1718: # Side Effects:
1719: # The reply is written to $client.
1720: #
1721:
1722: sub ls3_handler {
1723: my ($cmd, $tail, $client) = @_;
1724: my $userinput = "$cmd:$tail";
1725: my ($ulsdir,$getpropath,$getuserdir,$alternate_root,$uname,$udom) =
1726: split(/:/,$tail);
1727: if (defined($ulsdir)) {
1728: $ulsdir = &unescape($ulsdir);
1729: }
1730: if (defined($alternate_root)) {
1731: $alternate_root = &unescape($alternate_root);
1732: }
1733: if (defined($uname)) {
1734: $uname = &unescape($uname);
1735: }
1736: if (defined($udom)) {
1737: $udom = &unescape($udom);
1738: }
1739:
1740: my $dir_root = $perlvar{'lonDocRoot'};
1741: if ($getpropath) {
1742: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
1743: $dir_root = &propath($udom,$uname);
1744: $dir_root =~ s/\/$//;
1745: } else {
1746: &Failure($client,"refused\n","$cmd:$tail");
1747: return 1;
1748: }
1749: } elsif ($getuserdir) {
1750: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
1751: my $subdir=$uname.'__';
1752: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
1753: $dir_root = $Apache::lonnet::perlvar{'lonUsersDir'}
1754: ."/$udom/$subdir/$uname";
1755: } else {
1756: &Failure($client,"refused\n","$cmd:$tail");
1757: return 1;
1758: }
1759: } elsif ($alternate_root ne '') {
1760: $dir_root = $alternate_root;
1761: }
1762: if (($dir_root ne '') && ($dir_root ne '/')) {
1763: if ($ulsdir =~ /^\//) {
1764: $ulsdir = $dir_root.$ulsdir;
1765: } else {
1766: $ulsdir = $dir_root.'/'.$ulsdir;
1767: }
1768: }
1769: my $obs;
1770: my $rights;
1771: my $ulsout='';
1772: my $ulsfn;
1773: if (-e $ulsdir) {
1774: if(-d $ulsdir) {
1775: if (opendir(LSDIR,$ulsdir)) {
1776: while ($ulsfn=readdir(LSDIR)) {
1777: undef($obs);
1778: undef($rights);
1779: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1780: #We do some obsolete checking here
1781: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1782: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1783: my @obsolete=<FILE>;
1784: foreach my $obsolete (@obsolete) {
1785: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1786: if($obsolete =~ m|(<copyright>)(default)|) {
1787: $rights = 1;
1788: }
1789: }
1790: }
1791: my $tmp = $ulsfn.'&'.join('&',@ulsstats);
1792: if ($obs eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1793: if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1794: $ulsout.= &escape($tmp).':';
1795: }
1796: closedir(LSDIR);
1797: }
1798: } else {
1799: my @ulsstats=stat($ulsdir);
1800: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1801: }
1802: } else {
1803: $ulsout='no_such_dir';
1804: }
1805: if ($ulsout eq '') { $ulsout='empty'; }
1806: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1807: return 1;
1808: }
1809: ®ister_handler("ls3", \&ls3_handler, 0, 1, 0);
1810:
1811: sub read_lonnet_global {
1812: my ($cmd,$tail,$client) = @_;
1813: my $userinput = "$cmd:$tail";
1814: my $requested = &Apache::lonnet::thaw_unescape($tail);
1815: my $result;
1816: my %packagevars = (
1817: spareid => \%Apache::lonnet::spareid,
1818: perlvar => \%Apache::lonnet::perlvar,
1819: );
1820: my %limit_to = (
1821: perlvar => {
1822: lonOtherAuthen => 1,
1823: lonBalancer => 1,
1824: lonVersion => 1,
1825: lonSysEMail => 1,
1826: lonHostID => 1,
1827: lonRole => 1,
1828: lonDefDomain => 1,
1829: lonLoadLim => 1,
1830: lonUserLoadLim => 1,
1831: }
1832: );
1833: if (ref($requested) eq 'HASH') {
1834: foreach my $what (keys(%{$requested})) {
1835: my $response;
1836: my $items = {};
1837: if (exists($packagevars{$what})) {
1838: if (ref($limit_to{$what}) eq 'HASH') {
1839: foreach my $varname (keys(%{$packagevars{$what}})) {
1840: if ($limit_to{$what}{$varname}) {
1841: $items->{$varname} = $packagevars{$what}{$varname};
1842: }
1843: }
1844: } else {
1845: $items = $packagevars{$what};
1846: }
1847: if ($what eq 'perlvar') {
1848: if (!exists($packagevars{$what}{'lonBalancer'})) {
1849: if ($dist =~ /^(centos|rhes|fedora|scientific)/) {
1850: my $othervarref=LONCAPA::Configuration::read_conf('httpd.conf');
1851: if (ref($othervarref) eq 'HASH') {
1852: $items->{'lonBalancer'} = $othervarref->{'lonBalancer'};
1853: }
1854: }
1855: }
1856: }
1857: $response = &Apache::lonnet::freeze_escape($items);
1858: }
1859: $result .= &escape($what).'='.$response.'&';
1860: }
1861: }
1862: $result =~ s/\&$//;
1863: &Reply($client,\$result,$userinput);
1864: return 1;
1865: }
1866: ®ister_handler("readlonnetglobal", \&read_lonnet_global, 0, 1, 0);
1867:
1868: sub server_devalidatecache_handler {
1869: my ($cmd,$tail,$client) = @_;
1870: my $userinput = "$cmd:$tail";
1871: my $items = &unescape($tail);
1872: my @cached = split(/\&/,$items);
1873: foreach my $key (@cached) {
1874: if ($key =~ /:/) {
1875: my ($name,$id) = map { &unescape($_); } split(/:/,$key);
1876: &Apache::lonnet::devalidate_cache_new($name,$id);
1877: }
1878: }
1879: my $result = 'ok';
1880: &Reply($client,\$result,$userinput);
1881: return 1;
1882: }
1883: ®ister_handler("devalidatecache", \&server_devalidatecache_handler, 0, 1, 0);
1884:
1885: sub server_timezone_handler {
1886: my ($cmd,$tail,$client) = @_;
1887: my $userinput = "$cmd:$tail";
1888: my $timezone;
1889: my $clockfile = '/etc/sysconfig/clock'; # Fedora/CentOS/SuSE
1890: my $tzfile = '/etc/timezone'; # Debian/Ubuntu
1891: if (-e $clockfile) {
1892: if (open(my $fh,"<$clockfile")) {
1893: while (<$fh>) {
1894: next if (/^[\#\s]/);
1895: if (/^(?:TIME)?ZONE\s*=\s*['"]?\s*([\w\/]+)/) {
1896: $timezone = $1;
1897: last;
1898: }
1899: }
1900: close($fh);
1901: }
1902: } elsif (-e $tzfile) {
1903: if (open(my $fh,"<$tzfile")) {
1904: $timezone = <$fh>;
1905: close($fh);
1906: chomp($timezone);
1907: if ($timezone =~ m{^Etc/(\w+)$}) {
1908: $timezone = $1;
1909: }
1910: }
1911: }
1912: &Reply($client,\$timezone,$userinput); # This supports debug logging.
1913: return 1;
1914: }
1915: ®ister_handler("servertimezone", \&server_timezone_handler, 0, 1, 0);
1916:
1917: sub server_loncaparev_handler {
1918: my ($cmd,$tail,$client) = @_;
1919: my $userinput = "$cmd:$tail";
1920: &Reply($client,\$perlvar{'lonVersion'},$userinput);
1921: return 1;
1922: }
1923: ®ister_handler("serverloncaparev", \&server_loncaparev_handler, 0, 1, 0);
1924:
1925: sub server_homeID_handler {
1926: my ($cmd,$tail,$client) = @_;
1927: my $userinput = "$cmd:$tail";
1928: &Reply($client,\$perlvar{'lonHostID'},$userinput);
1929: return 1;
1930: }
1931: ®ister_handler("serverhomeID", \&server_homeID_handler, 0, 1, 0);
1932:
1933: sub server_distarch_handler {
1934: my ($cmd,$tail,$client) = @_;
1935: my $userinput = "$cmd:$tail";
1936: my $reply = &distro_and_arch();
1937: &Reply($client,\$reply,$userinput);
1938: return 1;
1939: }
1940: ®ister_handler("serverdistarch", \&server_distarch_handler, 0, 1, 0);
1941:
1942: sub server_certs_handler {
1943: my ($cmd,$tail,$client) = @_;
1944: my $userinput = "$cmd:$tail";
1945: my $result;
1946: my $result = &LONCAPA::Lond::server_certs(\%perlvar);
1947: &Reply($client,\$result,$userinput);
1948: return;
1949: }
1950: ®ister_handler("servercerts", \&server_certs_handler, 0, 1, 0);
1951:
1952: # Process a reinit request. Reinit requests that either
1953: # lonc or lond be reinitialized so that an updated
1954: # host.tab or domain.tab can be processed.
1955: #
1956: # Parameters:
1957: # $cmd - the actual keyword that invoked us.
1958: # $tail - the tail of the request that invoked us.
1959: # $client - File descriptor connected to the client
1960: # Returns:
1961: # 1 - Ok to continue processing.
1962: # 0 - Program should exit
1963: # Implicit output:
1964: # a reply is sent to the client.
1965: #
1966: sub reinit_process_handler {
1967: my ($cmd, $tail, $client) = @_;
1968:
1969: my $userinput = "$cmd:$tail";
1970:
1971: my $cert = &GetCertificate($userinput);
1972: if(&ValidManager($cert)) {
1973: chomp($userinput);
1974: my $reply = &ReinitProcess($userinput);
1975: &Reply( $client, \$reply, $userinput);
1976: } else {
1977: &Failure( $client, "refused\n", $userinput);
1978: }
1979: return 1;
1980: }
1981: ®ister_handler("reinit", \&reinit_process_handler, 1, 0, 1);
1982:
1983: # Process the editing script for a table edit operation.
1984: # the editing operation must be encrypted and requested by
1985: # a manager host.
1986: #
1987: # Parameters:
1988: # $cmd - the actual keyword that invoked us.
1989: # $tail - the tail of the request that invoked us.
1990: # $client - File descriptor connected to the client
1991: # Returns:
1992: # 1 - Ok to continue processing.
1993: # 0 - Program should exit
1994: # Implicit output:
1995: # a reply is sent to the client.
1996: #
1997: sub edit_table_handler {
1998: my ($command, $tail, $client) = @_;
1999:
2000: my $userinput = "$command:$tail";
2001:
2002: my $cert = &GetCertificate($userinput);
2003: if(&ValidManager($cert)) {
2004: my($filetype, $script) = split(/:/, $tail);
2005: if (($filetype eq "hosts") ||
2006: ($filetype eq "domain")) {
2007: if($script ne "") {
2008: &Reply($client, # BUGBUG - EditFile
2009: &EditFile($userinput), # could fail.
2010: $userinput);
2011: } else {
2012: &Failure($client,"refused\n",$userinput);
2013: }
2014: } else {
2015: &Failure($client,"refused\n",$userinput);
2016: }
2017: } else {
2018: &Failure($client,"refused\n",$userinput);
2019: }
2020: return 1;
2021: }
2022: ®ister_handler("edit", \&edit_table_handler, 1, 0, 1);
2023:
2024: #
2025: # Authenticate a user against the LonCAPA authentication
2026: # database. Note that there are several authentication
2027: # possibilities:
2028: # - unix - The user can be authenticated against the unix
2029: # password file.
2030: # - internal - The user can be authenticated against a purely
2031: # internal per user password file.
2032: # - kerberos - The user can be authenticated against either a kerb4 or kerb5
2033: # ticket granting authority.
2034: # - user - The person tailoring LonCAPA can supply a user authentication
2035: # mechanism that is per system.
2036: #
2037: # Parameters:
2038: # $cmd - The command that got us here.
2039: # $tail - Tail of the command (remaining parameters).
2040: # $client - File descriptor connected to client.
2041: # Returns
2042: # 0 - Requested to exit, caller should shut down.
2043: # 1 - Continue processing.
2044: # Implicit inputs:
2045: # The authentication systems describe above have their own forms of implicit
2046: # input into the authentication process that are described above.
2047: #
2048: sub authenticate_handler {
2049: my ($cmd, $tail, $client) = @_;
2050:
2051:
2052: # Regenerate the full input line
2053:
2054: my $userinput = $cmd.":".$tail;
2055:
2056: # udom - User's domain.
2057: # uname - Username.
2058: # upass - User's password.
2059: # checkdefauth - Pass to validate_user() to try authentication
2060: # with default auth type(s) if no user account.
2061: # clientcancheckhost - Passed by clients with functionality in lonauth.pm
2062: # to check if session can be hosted.
2063:
2064: my ($udom, $uname, $upass, $checkdefauth, $clientcancheckhost)=split(/:/,$tail);
2065: &Debug(" Authenticate domain = $udom, user = $uname, password = $upass, checkdefauth = $checkdefauth");
2066: chomp($upass);
2067: $upass=&unescape($upass);
2068:
2069: my $pwdcorrect = &validate_user($udom,$uname,$upass,$checkdefauth);
2070: if($pwdcorrect) {
2071: my $canhost = 1;
2072: unless ($clientcancheckhost) {
2073: my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
2074: my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
2075: my @intdoms;
2076: my $internet_names = &Apache::lonnet::get_internet_names($clientname);
2077: if (ref($internet_names) eq 'ARRAY') {
2078: @intdoms = @{$internet_names};
2079: }
2080: unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
2081: my ($remote,$hosted);
2082: my $remotesession = &get_usersession_config($udom,'remotesession');
2083: if (ref($remotesession) eq 'HASH') {
2084: $remote = $remotesession->{'remote'};
2085: }
2086: my $hostedsession = &get_usersession_config($clienthomedom,'hostedsession');
2087: if (ref($hostedsession) eq 'HASH') {
2088: $hosted = $hostedsession->{'hosted'};
2089: }
2090: $canhost = &Apache::lonnet::can_host_session($udom,$clientname,
2091: $clientversion,
2092: $remote,$hosted);
2093: }
2094: }
2095: if ($canhost) {
2096: &Reply( $client, "authorized\n", $userinput);
2097: } else {
2098: &Reply( $client, "not_allowed_to_host\n", $userinput);
2099: }
2100: #
2101: # Bad credentials: Failed to authorize
2102: #
2103: } else {
2104: &Failure( $client, "non_authorized\n", $userinput);
2105: }
2106:
2107: return 1;
2108: }
2109: ®ister_handler("auth", \&authenticate_handler, 1, 1, 0);
2110:
2111: #
2112: # Change a user's password. Note that this function is complicated by
2113: # the fact that a user may be authenticated in more than one way:
2114: # At present, we are not able to change the password for all types of
2115: # authentication methods. Only for:
2116: # unix - unix password or shadow passoword style authentication.
2117: # local - Locally written authentication mechanism.
2118: # For now, kerb4 and kerb5 password changes are not supported and result
2119: # in an error.
2120: # FUTURE WORK:
2121: # Support kerberos passwd changes?
2122: # Parameters:
2123: # $cmd - The command that got us here.
2124: # $tail - Tail of the command (remaining parameters).
2125: # $client - File descriptor connected to client.
2126: # Returns
2127: # 0 - Requested to exit, caller should shut down.
2128: # 1 - Continue processing.
2129: # Implicit inputs:
2130: # The authentication systems describe above have their own forms of implicit
2131: # input into the authentication process that are described above.
2132: sub change_password_handler {
2133: my ($cmd, $tail, $client) = @_;
2134:
2135: my $userinput = $cmd.":".$tail; # Reconstruct client's string.
2136:
2137: #
2138: # udom - user's domain.
2139: # uname - Username.
2140: # upass - Current password.
2141: # npass - New password.
2142: # context - Context in which this was called
2143: # (preferences or reset_by_email).
2144: # lonhost - HostID of server where request originated
2145:
2146: my ($udom,$uname,$upass,$npass,$context,$lonhost)=split(/:/,$tail);
2147:
2148: $upass=&unescape($upass);
2149: $npass=&unescape($npass);
2150: &Debug("Trying to change password for $uname");
2151:
2152: # First require that the user can be authenticated with their
2153: # old password unless context was 'reset_by_email':
2154:
2155: my ($validated,$failure);
2156: if ($context eq 'reset_by_email') {
2157: if ($lonhost eq '') {
2158: $failure = 'invalid_client';
2159: } else {
2160: $validated = 1;
2161: }
2162: } else {
2163: $validated = &validate_user($udom, $uname, $upass);
2164: }
2165: if($validated) {
2166: my $realpasswd = &get_auth_type($udom, $uname); # Defined since authd.
2167:
2168: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
2169: if ($howpwd eq 'internal') {
2170: &Debug("internal auth");
2171: my $ncpass = &hash_passwd($udom,$npass);
2172: if(&rewrite_password_file($udom, $uname, "internal:$ncpass")) {
2173: my $msg="Result of password change for $uname: pwchange_success";
2174: if ($lonhost) {
2175: $msg .= " - request originated from: $lonhost";
2176: }
2177: &logthis($msg);
2178: &update_passwd_history($uname,$udom,$howpwd,$context);
2179: &Reply($client, "ok\n", $userinput);
2180: } else {
2181: &logthis("Unable to open $uname passwd "
2182: ."to change password");
2183: &Failure( $client, "non_authorized\n",$userinput);
2184: }
2185: } elsif ($howpwd eq 'unix' && $context ne 'reset_by_email') {
2186: my $result = &change_unix_password($uname, $npass);
2187: if ($result eq 'ok') {
2188: &update_passwd_history($uname,$udom,$howpwd,$context);
2189: }
2190: &logthis("Result of password change for $uname: ".
2191: $result);
2192: &Reply($client, \$result, $userinput);
2193: } else {
2194: # this just means that the current password mode is not
2195: # one we know how to change (e.g the kerberos auth modes or
2196: # locally written auth handler).
2197: #
2198: &Failure( $client, "auth_mode_error\n", $userinput);
2199: }
2200:
2201: } else {
2202: if ($failure eq '') {
2203: $failure = 'non_authorized';
2204: }
2205: &Failure( $client, "$failure\n", $userinput);
2206: }
2207:
2208: return 1;
2209: }
2210: ®ister_handler("passwd", \&change_password_handler, 1, 1, 0);
2211:
2212: sub hash_passwd {
2213: my ($domain,$plainpass,@rest) = @_;
2214: my ($salt,$cost);
2215: if (@rest) {
2216: $cost = $rest[0];
2217: # salt is first 22 characters, base-64 encoded by bcrypt
2218: my $plainsalt = substr($rest[1],0,22);
2219: $salt = Crypt::Eksblowfish::Bcrypt::de_base64($plainsalt);
2220: } else {
2221: my $defaultcost;
2222: my %domconfig =
2223: &Apache::lonnet::get_dom('configuration',['password'],$domain);
2224: if (ref($domconfig{'password'}) eq 'HASH') {
2225: $defaultcost = $domconfig{'password'}{'cost'};
2226: }
2227: if (($defaultcost eq '') || ($defaultcost =~ /D/)) {
2228: $cost = 10;
2229: } else {
2230: $cost = $defaultcost;
2231: }
2232: # Generate random 16-octet base64 salt
2233: $salt = "";
2234: $salt .= pack("C", int rand(256)) for 1..16;
2235: }
2236: my $hash = &Crypt::Eksblowfish::Bcrypt::bcrypt_hash({
2237: key_nul => 1,
2238: cost => $cost,
2239: salt => $salt,
2240: }, Digest::SHA::sha512(Encode::encode('UTF-8',$plainpass)));
2241:
2242: my $result = join("!", "", "bcrypt", sprintf("%02d",$cost),
2243: &Crypt::Eksblowfish::Bcrypt::en_base64($salt).
2244: &Crypt::Eksblowfish::Bcrypt::en_base64($hash));
2245: return $result;
2246: }
2247:
2248: #
2249: # Create a new user. User in this case means a lon-capa user.
2250: # The user must either already exist in some authentication realm
2251: # like kerberos or the /etc/passwd. If not, a user completely local to
2252: # this loncapa system is created.
2253: #
2254: # Parameters:
2255: # $cmd - The command that got us here.
2256: # $tail - Tail of the command (remaining parameters).
2257: # $client - File descriptor connected to client.
2258: # Returns
2259: # 0 - Requested to exit, caller should shut down.
2260: # 1 - Continue processing.
2261: # Implicit inputs:
2262: # The authentication systems describe above have their own forms of implicit
2263: # input into the authentication process that are described above.
2264: sub add_user_handler {
2265:
2266: my ($cmd, $tail, $client) = @_;
2267:
2268:
2269: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
2270: my $userinput = $cmd.":".$tail; # Reconstruct the full request line.
2271:
2272: &Debug("cmd =".$cmd." $udom =".$udom." uname=".$uname);
2273:
2274:
2275: if($udom eq $currentdomainid) { # Reject new users for other domains...
2276:
2277: my $oldumask=umask(0077);
2278: chomp($npass);
2279: $npass=&unescape($npass);
2280: my $passfilename = &password_path($udom, $uname);
2281: &Debug("Password file created will be:".$passfilename);
2282: if (-e $passfilename) {
2283: &Failure( $client, "already_exists\n", $userinput);
2284: } else {
2285: my $fperror='';
2286: if (!&mkpath($passfilename)) {
2287: $fperror="error: ".($!+0)." mkdir failed while attempting "
2288: ."makeuser";
2289: }
2290: unless ($fperror) {
2291: my $result=&make_passwd_file($uname,$udom,$umode,$npass,
2292: $passfilename,'makeuser');
2293: &Reply($client,\$result, $userinput); #BUGBUG - could be fail
2294: } else {
2295: &Failure($client, \$fperror, $userinput);
2296: }
2297: }
2298: umask($oldumask);
2299: } else {
2300: &Failure($client, "not_right_domain\n",
2301: $userinput); # Even if we are multihomed.
2302:
2303: }
2304: return 1;
2305:
2306: }
2307: ®ister_handler("makeuser", \&add_user_handler, 1, 1, 0);
2308:
2309: #
2310: # Change the authentication method of a user. Note that this may
2311: # also implicitly change the user's password if, for example, the user is
2312: # joining an existing authentication realm. Known authentication realms at
2313: # this time are:
2314: # internal - Purely internal password file (only loncapa knows this user)
2315: # local - Institutionally written authentication module.
2316: # unix - Unix user (/etc/passwd with or without /etc/shadow).
2317: # kerb4 - kerberos version 4
2318: # kerb5 - kerberos version 5
2319: #
2320: # Parameters:
2321: # $cmd - The command that got us here.
2322: # $tail - Tail of the command (remaining parameters).
2323: # $client - File descriptor connected to client.
2324: # Returns
2325: # 0 - Requested to exit, caller should shut down.
2326: # 1 - Continue processing.
2327: # Implicit inputs:
2328: # The authentication systems describe above have their own forms of implicit
2329: # input into the authentication process that are described above.
2330: # NOTE:
2331: # This is also used to change the authentication credential values (e.g. passwd).
2332: #
2333: #
2334: sub change_authentication_handler {
2335:
2336: my ($cmd, $tail, $client) = @_;
2337:
2338: my $userinput = "$cmd:$tail"; # Reconstruct user input.
2339:
2340: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
2341: &Debug("cmd = ".$cmd." domain= ".$udom."uname =".$uname." umode= ".$umode);
2342: if ($udom ne $currentdomainid) {
2343: &Failure( $client, "not_right_domain\n", $client);
2344: } else {
2345:
2346: chomp($npass);
2347:
2348: $npass=&unescape($npass);
2349: my $oldauth = &get_auth_type($udom, $uname); # Get old auth info.
2350: my $passfilename = &password_path($udom, $uname);
2351: if ($passfilename) { # Not allowed to create a new user!!
2352: # If just changing the unix passwd. need to arrange to run
2353: # passwd since otherwise make_passwd_file will fail as
2354: # creation of unix authenticated users is no longer supported
2355: # except from the command line, when running make_domain_coordinator.pl
2356:
2357: if(($oldauth =~/^unix/) && ($umode eq "unix")) {
2358: my $result = &change_unix_password($uname, $npass);
2359: &logthis("Result of password change for $uname: ".$result);
2360: if ($result eq "ok") {
2361: &update_passwd_history($uname,$udom,$umode,'changeuserauth');
2362: &Reply($client, \$result);
2363: } else {
2364: &Failure($client, \$result);
2365: }
2366: } else {
2367: my $result=&make_passwd_file($uname,$udom,$umode,$npass,
2368: $passfilename,'changeuserauth');
2369: #
2370: # If the current auth mode is internal, and the old auth mode was
2371: # unix, or krb*, and the user is an author for this domain,
2372: # re-run manage_permissions for that role in order to be able
2373: # to take ownership of the construction space back to www:www
2374: #
2375:
2376:
2377: &Reply($client, \$result, $userinput);
2378: }
2379:
2380:
2381: } else {
2382: &Failure($client, "non_authorized\n", $userinput); # Fail the user now.
2383: }
2384: }
2385: return 1;
2386: }
2387: ®ister_handler("changeuserauth", \&change_authentication_handler, 1,1, 0);
2388:
2389: sub update_passwd_history {
2390: my ($uname,$udom,$umode,$context) = @_;
2391: my $proname=&propath($udom,$uname);
2392: my $now = time;
2393: if (open(my $fh,">>$proname/passwd.log")) {
2394: print $fh "$now:$umode:$context\n";
2395: close($fh);
2396: }
2397: return;
2398: }
2399:
2400: #
2401: # Determines if this is the home server for a user. The home server
2402: # for a user will have his/her lon-capa passwd file. Therefore all we need
2403: # to do is determine if this file exists.
2404: #
2405: # Parameters:
2406: # $cmd - The command that got us here.
2407: # $tail - Tail of the command (remaining parameters).
2408: # $client - File descriptor connected to client.
2409: # Returns
2410: # 0 - Requested to exit, caller should shut down.
2411: # 1 - Continue processing.
2412: # Implicit inputs:
2413: # The authentication systems describe above have their own forms of implicit
2414: # input into the authentication process that are described above.
2415: #
2416: sub is_home_handler {
2417: my ($cmd, $tail, $client) = @_;
2418:
2419: my $userinput = "$cmd:$tail";
2420:
2421: my ($udom,$uname)=split(/:/,$tail);
2422: chomp($uname);
2423: my $passfile = &password_filename($udom, $uname);
2424: if($passfile) {
2425: &Reply( $client, "found\n", $userinput);
2426: } else {
2427: &Failure($client, "not_found\n", $userinput);
2428: }
2429: return 1;
2430: }
2431: ®ister_handler("home", \&is_home_handler, 0,1,0);
2432:
2433: #
2434: # Process an update request for a resource.
2435: # A resource has been modified that we hold a subscription to.
2436: # If the resource is not local, then we must update, or at least invalidate our
2437: # cached copy of the resource.
2438: # Parameters:
2439: # $cmd - The command that got us here.
2440: # $tail - Tail of the command (remaining parameters).
2441: # $client - File descriptor connected to client.
2442: # Returns
2443: # 0 - Requested to exit, caller should shut down.
2444: # 1 - Continue processing.
2445: # Implicit inputs:
2446: # The authentication systems describe above have their own forms of implicit
2447: # input into the authentication process that are described above.
2448: #
2449: sub update_resource_handler {
2450:
2451: my ($cmd, $tail, $client) = @_;
2452:
2453: my $userinput = "$cmd:$tail";
2454:
2455: my $fname= $tail; # This allows interactive testing
2456:
2457:
2458: my $ownership=ishome($fname);
2459: if ($ownership eq 'not_owner') {
2460: if (-e $fname) {
2461: # Delete preview file, if exists
2462: unlink("$fname.tmp");
2463: # Get usage stats
2464: my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
2465: $atime,$mtime,$ctime,$blksize,$blocks)=stat($fname);
2466: my $now=time;
2467: my $since=$now-$atime;
2468: # If the file has not been used within lonExpire seconds,
2469: # unsubscribe from it and delete local copy
2470: if ($since>$perlvar{'lonExpire'}) {
2471: my $reply=&Apache::lonnet::reply("unsub:$fname","$clientname");
2472: &devalidate_meta_cache($fname);
2473: unlink("$fname");
2474: unlink("$fname.meta");
2475: } else {
2476: # Yes, this is in active use. Get a fresh copy. Since it might be in
2477: # very active use and huge (like a movie), copy it to "in.transfer" filename first.
2478: my $transname="$fname.in.transfer";
2479: my $remoteurl=&Apache::lonnet::reply("sub:$fname","$clientname");
2480: my $response;
2481: # FIXME: cannot replicate files that take more than two minutes to transfer?
2482: # alarm(120);
2483: # FIXME: this should use the LWP mechanism, not internal alarms.
2484: alarm(1200);
2485: {
2486: my $request=new HTTP::Request('GET',"$remoteurl");
2487: $response=&LONCAPA::LWPReq::makerequest($clientname,$request,$transname,\%perlvar,1200,0,1);
2488: }
2489: alarm(0);
2490: if ($response->is_error()) {
2491: # FIXME: we should probably clean up here instead of just whine
2492: unlink($transname);
2493: my $message=$response->status_line;
2494: &logthis("LWP GET: $message for $fname ($remoteurl)");
2495: } else {
2496: if ($remoteurl!~/\.meta$/) {
2497: # FIXME: isn't there an internal LWP mechanism for this?
2498: alarm(120);
2499: {
2500: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
2501: my $mresponse = &LONCAPA::LWPReq::makerequest($clientname,$mrequest,$fname.'.meta',\%perlvar,120,0,1);
2502: if ($mresponse->is_error()) {
2503: unlink($fname.'.meta');
2504: }
2505: }
2506: alarm(0);
2507: }
2508: # we successfully transfered, copy file over to real name
2509: rename($transname,$fname);
2510: &devalidate_meta_cache($fname);
2511: }
2512: }
2513: &Reply( $client, "ok\n", $userinput);
2514: } else {
2515: &Failure($client, "not_found\n", $userinput);
2516: }
2517: } else {
2518: &Failure($client, "rejected\n", $userinput);
2519: }
2520: return 1;
2521: }
2522: ®ister_handler("update", \&update_resource_handler, 0 ,1, 0);
2523:
2524: sub devalidate_meta_cache {
2525: my ($url) = @_;
2526: use Cache::Memcached;
2527: my $memcache = new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
2528: $url = &Apache::lonnet::declutter($url);
2529: $url =~ s-\.meta$--;
2530: my $id = &escape('meta:'.$url);
2531: $memcache->delete($id);
2532: }
2533:
2534: #
2535: # Fetch a user file from a remote server to the user's home directory
2536: # userfiles subdir.
2537: # Parameters:
2538: # $cmd - The command that got us here.
2539: # $tail - Tail of the command (remaining parameters).
2540: # $client - File descriptor connected to client.
2541: # Returns
2542: # 0 - Requested to exit, caller should shut down.
2543: # 1 - Continue processing.
2544: #
2545: sub fetch_user_file_handler {
2546:
2547: my ($cmd, $tail, $client) = @_;
2548:
2549: my $userinput = "$cmd:$tail";
2550: my $fname = $tail;
2551: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
2552: my $udir=&propath($udom,$uname).'/userfiles';
2553: unless (-e $udir) {
2554: mkdir($udir,0770);
2555: }
2556: Debug("fetch user file for $fname");
2557: if (-e $udir) {
2558: $ufile=~s/^[\.\~]+//;
2559:
2560: # IF necessary, create the path right down to the file.
2561: # Note that any regular files in the way of this path are
2562: # wiped out to deal with some earlier folly of mine.
2563:
2564: if (!&mkpath($udir.'/'.$ufile)) {
2565: &Failure($client, "unable_to_create\n", $userinput);
2566: }
2567:
2568: my $destname=$udir.'/'.$ufile;
2569: my $transname=$udir.'/'.$ufile.'.in.transit';
2570: my $clientprotocol=$Apache::lonnet::protocol{$clientname};
2571: $clientprotocol = 'http' if ($clientprotocol ne 'https');
2572: my $clienthost = &Apache::lonnet::hostname($clientname);
2573: my $remoteurl=$clientprotocol.'://'.$clienthost.'/userfiles/'.$fname;
2574: my $response;
2575: Debug("Remote URL : $remoteurl Transfername $transname Destname: $destname");
2576: alarm(1200);
2577: {
2578: my $request=new HTTP::Request('GET',"$remoteurl");
2579: my $verifycert = 1;
2580: my @machine_ids = &Apache::lonnet::current_machine_ids();
2581: if (grep(/^\Q$clientname\E$/,@machine_ids)) {
2582: $verifycert = 0;
2583: }
2584: $response = &LONCAPA::LWPReq::makerequest($clientname,$request,$transname,\%perlvar,1200,$verifycert);
2585: }
2586: alarm(0);
2587: if ($response->is_error()) {
2588: unlink($transname);
2589: my $message=$response->status_line;
2590: &logthis("LWP GET: $message for $fname ($remoteurl)");
2591: &Failure($client, "failed\n", $userinput);
2592: } else {
2593: Debug("Renaming $transname to $destname");
2594: if (!rename($transname,$destname)) {
2595: &logthis("Unable to move $transname to $destname");
2596: unlink($transname);
2597: &Failure($client, "failed\n", $userinput);
2598: } else {
2599: if ($fname =~ /^default.+\.(page|sequence)$/) {
2600: my ($major,$minor) = split(/\./,$clientversion);
2601: if (($major < 2) || ($major == 2 && $minor < 11)) {
2602: my $now = time;
2603: &Apache::lonnet::do_cache_new('crschange',$udom.'_'.$uname,$now,600);
2604: my $key = &escape('internal.contentchange');
2605: my $what = "$key=$now";
2606: my $hashref = &tie_user_hash($udom,$uname,'environment',
2607: &GDBM_WRCREAT(),"P",$what);
2608: if ($hashref) {
2609: $hashref->{$key}=$now;
2610: if (!&untie_user_hash($hashref)) {
2611: &logthis("error: ".($!+0)." untie (GDBM) failed ".
2612: "when updating internal.contentchange");
2613: }
2614: }
2615: }
2616: }
2617: &Reply($client, "ok\n", $userinput);
2618: }
2619: }
2620: } else {
2621: &Failure($client, "not_home\n", $userinput);
2622: }
2623: return 1;
2624: }
2625: ®ister_handler("fetchuserfile", \&fetch_user_file_handler, 0, 1, 0);
2626:
2627: #
2628: # Remove a file from a user's home directory userfiles subdirectory.
2629: # Parameters:
2630: # cmd - the Lond request keyword that got us here.
2631: # tail - the part of the command past the keyword.
2632: # client- File descriptor connected with the client.
2633: #
2634: # Returns:
2635: # 1 - Continue processing.
2636: sub remove_user_file_handler {
2637: my ($cmd, $tail, $client) = @_;
2638:
2639: my ($fname) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2640:
2641: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
2642: if ($ufile =~m|/\.\./|) {
2643: # any files paths with /../ in them refuse
2644: # to deal with
2645: &Failure($client, "refused\n", "$cmd:$tail");
2646: } else {
2647: my $udir = &propath($udom,$uname);
2648: if (-e $udir) {
2649: my $file=$udir.'/userfiles/'.$ufile;
2650: if (-e $file) {
2651: #
2652: # If the file is a regular file unlink is fine...
2653: # However it's possible the client wants a dir
2654: # removed, in which case rmdir is more appropriate.
2655: # Note: rmdir will only remove an empty directory.
2656: #
2657: if (-f $file){
2658: unlink($file);
2659: # for html files remove the associated .bak file
2660: # which may have been created by the editor.
2661: if ($ufile =~ m{^((docs|supplemental)/(?:\d+|default)/\d+(?:|/.+)/)[^/]+\.x?html?$}i) {
2662: my $path = $1;
2663: if (-e $file.'.bak') {
2664: unlink($file.'.bak');
2665: }
2666: }
2667: } elsif(-d $file) {
2668: rmdir($file);
2669: }
2670: if (-e $file) {
2671: # File is still there after we deleted it ?!?
2672:
2673: &Failure($client, "failed\n", "$cmd:$tail");
2674: } else {
2675: &Reply($client, "ok\n", "$cmd:$tail");
2676: }
2677: } else {
2678: &Failure($client, "not_found\n", "$cmd:$tail");
2679: }
2680: } else {
2681: &Failure($client, "not_home\n", "$cmd:$tail");
2682: }
2683: }
2684: return 1;
2685: }
2686: ®ister_handler("removeuserfile", \&remove_user_file_handler, 0,1,0);
2687:
2688: #
2689: # make a directory in a user's home directory userfiles subdirectory.
2690: # Parameters:
2691: # cmd - the Lond request keyword that got us here.
2692: # tail - the part of the command past the keyword.
2693: # client- File descriptor connected with the client.
2694: #
2695: # Returns:
2696: # 1 - Continue processing.
2697: sub mkdir_user_file_handler {
2698: my ($cmd, $tail, $client) = @_;
2699:
2700: my ($dir) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2701: $dir=&unescape($dir);
2702: my ($udom,$uname,$ufile) = ($dir =~ m|^([^/]+)/([^/]+)/(.+)$|);
2703: if ($ufile =~m|/\.\./|) {
2704: # any files paths with /../ in them refuse
2705: # to deal with
2706: &Failure($client, "refused\n", "$cmd:$tail");
2707: } else {
2708: my $udir = &propath($udom,$uname);
2709: if (-e $udir) {
2710: my $newdir=$udir.'/userfiles/'.$ufile.'/';
2711: if (!&mkpath($newdir)) {
2712: &Failure($client, "failed\n", "$cmd:$tail");
2713: }
2714: &Reply($client, "ok\n", "$cmd:$tail");
2715: } else {
2716: &Failure($client, "not_home\n", "$cmd:$tail");
2717: }
2718: }
2719: return 1;
2720: }
2721: ®ister_handler("mkdiruserfile", \&mkdir_user_file_handler, 0,1,0);
2722:
2723: #
2724: # rename a file in a user's home directory userfiles subdirectory.
2725: # Parameters:
2726: # cmd - the Lond request keyword that got us here.
2727: # tail - the part of the command past the keyword.
2728: # client- File descriptor connected with the client.
2729: #
2730: # Returns:
2731: # 1 - Continue processing.
2732: sub rename_user_file_handler {
2733: my ($cmd, $tail, $client) = @_;
2734:
2735: my ($udom,$uname,$old,$new) = split(/:/, $tail);
2736: $old=&unescape($old);
2737: $new=&unescape($new);
2738: if ($new =~m|/\.\./| || $old =~m|/\.\./|) {
2739: # any files paths with /../ in them refuse to deal with
2740: &Failure($client, "refused\n", "$cmd:$tail");
2741: } else {
2742: my $udir = &propath($udom,$uname);
2743: if (-e $udir) {
2744: my $oldfile=$udir.'/userfiles/'.$old;
2745: my $newfile=$udir.'/userfiles/'.$new;
2746: if (-e $newfile) {
2747: &Failure($client, "exists\n", "$cmd:$tail");
2748: } elsif (! -e $oldfile) {
2749: &Failure($client, "not_found\n", "$cmd:$tail");
2750: } else {
2751: if (!rename($oldfile,$newfile)) {
2752: &Failure($client, "failed\n", "$cmd:$tail");
2753: } else {
2754: &Reply($client, "ok\n", "$cmd:$tail");
2755: }
2756: }
2757: } else {
2758: &Failure($client, "not_home\n", "$cmd:$tail");
2759: }
2760: }
2761: return 1;
2762: }
2763: ®ister_handler("renameuserfile", \&rename_user_file_handler, 0,1,0);
2764:
2765: #
2766: # Checks if the specified user has an active session on the server
2767: # return ok if so, not_found if not
2768: #
2769: # Parameters:
2770: # cmd - The request keyword that dispatched to tus.
2771: # tail - The tail of the request (colon separated parameters).
2772: # client - Filehandle open on the client.
2773: # Return:
2774: # 1.
2775: sub user_has_session_handler {
2776: my ($cmd, $tail, $client) = @_;
2777:
2778: my ($udom, $uname) = map { &unescape($_) } (split(/:/, $tail));
2779:
2780: opendir(DIR,$perlvar{'lonIDsDir'});
2781: my $filename;
2782: while ($filename=readdir(DIR)) {
2783: last if ($filename=~/^\Q$uname\E_\d+_\Q$udom\E_/);
2784: }
2785: if ($filename) {
2786: &Reply($client, "ok\n", "$cmd:$tail");
2787: } else {
2788: &Failure($client, "not_found\n", "$cmd:$tail");
2789: }
2790: return 1;
2791:
2792: }
2793: ®ister_handler("userhassession", \&user_has_session_handler, 0,1,0);
2794:
2795: #
2796: # Authenticate access to a user file by checking that the token the user's
2797: # passed also exists in their session file
2798: #
2799: # Parameters:
2800: # cmd - The request keyword that dispatched to tus.
2801: # tail - The tail of the request (colon separated parameters).
2802: # client - Filehandle open on the client.
2803: # Return:
2804: # 1.
2805: sub token_auth_user_file_handler {
2806: my ($cmd, $tail, $client) = @_;
2807:
2808: my ($fname, $session) = split(/:/, $tail);
2809:
2810: chomp($session);
2811: my $reply="non_auth";
2812: my $file = $perlvar{'lonIDsDir'}.'/'.$session.'.id';
2813: if (open(ENVIN,"$file")) {
2814: flock(ENVIN,LOCK_SH);
2815: tie(my %disk_env,'GDBM_File',"$file",&GDBM_READER(),0640);
2816: if (exists($disk_env{"userfile.$fname"})) {
2817: $reply="ok";
2818: } else {
2819: foreach my $envname (keys(%disk_env)) {
2820: if ($envname=~ m|^userfile\.\Q$fname\E|) {
2821: $reply="ok";
2822: last;
2823: }
2824: }
2825: }
2826: untie(%disk_env);
2827: close(ENVIN);
2828: &Reply($client, \$reply, "$cmd:$tail");
2829: } else {
2830: &Failure($client, "invalid_token\n", "$cmd:$tail");
2831: }
2832: return 1;
2833:
2834: }
2835: ®ister_handler("tokenauthuserfile", \&token_auth_user_file_handler, 0,1,0);
2836:
2837: #
2838: # Unsubscribe from a resource.
2839: #
2840: # Parameters:
2841: # $cmd - The command that got us here.
2842: # $tail - Tail of the command (remaining parameters).
2843: # $client - File descriptor connected to client.
2844: # Returns
2845: # 0 - Requested to exit, caller should shut down.
2846: # 1 - Continue processing.
2847: #
2848: sub unsubscribe_handler {
2849: my ($cmd, $tail, $client) = @_;
2850:
2851: my $userinput= "$cmd:$tail";
2852:
2853: my ($fname) = split(/:/,$tail); # Split in case there's extrs.
2854:
2855: &Debug("Unsubscribing $fname");
2856: if (-e $fname) {
2857: &Debug("Exists");
2858: &Reply($client, &unsub($fname,$clientip), $userinput);
2859: } else {
2860: &Failure($client, "not_found\n", $userinput);
2861: }
2862: return 1;
2863: }
2864: ®ister_handler("unsub", \&unsubscribe_handler, 0, 1, 0);
2865:
2866: # Subscribe to a resource
2867: #
2868: # Parameters:
2869: # $cmd - The command that got us here.
2870: # $tail - Tail of the command (remaining parameters).
2871: # $client - File descriptor connected to client.
2872: # Returns
2873: # 0 - Requested to exit, caller should shut down.
2874: # 1 - Continue processing.
2875: #
2876: sub subscribe_handler {
2877: my ($cmd, $tail, $client)= @_;
2878:
2879: my $userinput = "$cmd:$tail";
2880:
2881: &Reply( $client, &subscribe($userinput,$clientip), $userinput);
2882:
2883: return 1;
2884: }
2885: ®ister_handler("sub", \&subscribe_handler, 0, 1, 0);
2886:
2887: #
2888: # Determine the latest version of a resource (it looks for the highest
2889: # past version and then returns that +1)
2890: #
2891: # Parameters:
2892: # $cmd - The command that got us here.
2893: # $tail - Tail of the command (remaining parameters).
2894: # (Should consist of an absolute path to a file)
2895: # $client - File descriptor connected to client.
2896: # Returns
2897: # 0 - Requested to exit, caller should shut down.
2898: # 1 - Continue processing.
2899: #
2900: sub current_version_handler {
2901: my ($cmd, $tail, $client) = @_;
2902:
2903: my $userinput= "$cmd:$tail";
2904:
2905: my $fname = $tail;
2906: &Reply( $client, ¤tversion($fname)."\n", $userinput);
2907: return 1;
2908:
2909: }
2910: ®ister_handler("currentversion", \¤t_version_handler, 0, 1, 0);
2911:
2912: # Make an entry in a user's activity log.
2913: #
2914: # Parameters:
2915: # $cmd - The command that got us here.
2916: # $tail - Tail of the command (remaining parameters).
2917: # $client - File descriptor connected to client.
2918: # Returns
2919: # 0 - Requested to exit, caller should shut down.
2920: # 1 - Continue processing.
2921: #
2922: sub activity_log_handler {
2923: my ($cmd, $tail, $client) = @_;
2924:
2925:
2926: my $userinput= "$cmd:$tail";
2927:
2928: my ($udom,$uname,$what)=split(/:/,$tail);
2929: chomp($what);
2930: my $proname=&propath($udom,$uname);
2931: my $now=time;
2932: my $hfh;
2933: if ($hfh=IO::File->new(">>$proname/activity.log")) {
2934: print $hfh "$now:$clientname:$what\n";
2935: &Reply( $client, "ok\n", $userinput);
2936: } else {
2937: &Failure($client, "error: ".($!+0)." IO::File->new Failed "
2938: ."while attempting log\n",
2939: $userinput);
2940: }
2941:
2942: return 1;
2943: }
2944: ®ister_handler("log", \&activity_log_handler, 0, 1, 0);
2945:
2946: #
2947: # Put a namespace entry in a user profile hash.
2948: # My druthers would be for this to be an encrypted interaction too.
2949: # anything that might be an inadvertent covert channel about either
2950: # user authentication or user personal information....
2951: #
2952: # Parameters:
2953: # $cmd - The command that got us here.
2954: # $tail - Tail of the command (remaining parameters).
2955: # $client - File descriptor connected to client.
2956: # Returns
2957: # 0 - Requested to exit, caller should shut down.
2958: # 1 - Continue processing.
2959: #
2960: sub put_user_profile_entry {
2961: my ($cmd, $tail, $client) = @_;
2962:
2963: my $userinput = "$cmd:$tail";
2964:
2965: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
2966: if ($namespace ne 'roles') {
2967: chomp($what);
2968: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2969: &GDBM_WRCREAT(),"P",$what);
2970: if($hashref) {
2971: my @pairs=split(/\&/,$what);
2972: foreach my $pair (@pairs) {
2973: my ($key,$value)=split(/=/,$pair);
2974: $hashref->{$key}=$value;
2975: }
2976: if (&untie_user_hash($hashref)) {
2977: &Reply( $client, "ok\n", $userinput);
2978: } else {
2979: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2980: "while attempting put\n",
2981: $userinput);
2982: }
2983: } else {
2984: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2985: "while attempting put\n", $userinput);
2986: }
2987: } else {
2988: &Failure( $client, "refused\n", $userinput);
2989: }
2990:
2991: return 1;
2992: }
2993: ®ister_handler("put", \&put_user_profile_entry, 0, 1, 0);
2994:
2995: # Put a piece of new data in hash, returns error if entry already exists
2996: # Parameters:
2997: # $cmd - The command that got us here.
2998: # $tail - Tail of the command (remaining parameters).
2999: # $client - File descriptor connected to client.
3000: # Returns
3001: # 0 - Requested to exit, caller should shut down.
3002: # 1 - Continue processing.
3003: #
3004: sub newput_user_profile_entry {
3005: my ($cmd, $tail, $client) = @_;
3006:
3007: my $userinput = "$cmd:$tail";
3008:
3009: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
3010: if ($namespace eq 'roles') {
3011: &Failure( $client, "refused\n", $userinput);
3012: return 1;
3013: }
3014:
3015: chomp($what);
3016:
3017: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3018: &GDBM_WRCREAT(),"N",$what);
3019: if(!$hashref) {
3020: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3021: "while attempting put\n", $userinput);
3022: return 1;
3023: }
3024:
3025: my @pairs=split(/\&/,$what);
3026: foreach my $pair (@pairs) {
3027: my ($key,$value)=split(/=/,$pair);
3028: if (exists($hashref->{$key})) {
3029: if (!&untie_user_hash($hashref)) {
3030: &logthis("error: ".($!+0)." untie (GDBM) failed ".
3031: "while attempting newput - early out as key exists");
3032: }
3033: &Failure($client, "key_exists: ".$key."\n",$userinput);
3034: return 1;
3035: }
3036: }
3037:
3038: foreach my $pair (@pairs) {
3039: my ($key,$value)=split(/=/,$pair);
3040: $hashref->{$key}=$value;
3041: }
3042:
3043: if (&untie_user_hash($hashref)) {
3044: &Reply( $client, "ok\n", $userinput);
3045: } else {
3046: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
3047: "while attempting put\n",
3048: $userinput);
3049: }
3050: return 1;
3051: }
3052: ®ister_handler("newput", \&newput_user_profile_entry, 0, 1, 0);
3053:
3054: #
3055: # Increment a profile entry in the user history file.
3056: # The history contains keyword value pairs. In this case,
3057: # The value itself is a pair of numbers. The first, the current value
3058: # the second an increment that this function applies to the current
3059: # value.
3060: #
3061: # Parameters:
3062: # $cmd - The command that got us here.
3063: # $tail - Tail of the command (remaining parameters).
3064: # $client - File descriptor connected to client.
3065: # Returns
3066: # 0 - Requested to exit, caller should shut down.
3067: # 1 - Continue processing.
3068: #
3069: sub increment_user_value_handler {
3070: my ($cmd, $tail, $client) = @_;
3071:
3072: my $userinput = "$cmd:$tail";
3073:
3074: my ($udom,$uname,$namespace,$what) =split(/:/,$tail);
3075: if ($namespace ne 'roles') {
3076: chomp($what);
3077: my $hashref = &tie_user_hash($udom, $uname,
3078: $namespace, &GDBM_WRCREAT(),
3079: "P",$what);
3080: if ($hashref) {
3081: my @pairs=split(/\&/,$what);
3082: foreach my $pair (@pairs) {
3083: my ($key,$value)=split(/=/,$pair);
3084: $value = &unescape($value);
3085: # We could check that we have a number...
3086: if (! defined($value) || $value eq '') {
3087: $value = 1;
3088: }
3089: $hashref->{$key}+=$value;
3090: if ($namespace eq 'nohist_resourcetracker') {
3091: if ($hashref->{$key} < 0) {
3092: $hashref->{$key} = 0;
3093: }
3094: }
3095: }
3096: if (&untie_user_hash($hashref)) {
3097: &Reply( $client, "ok\n", $userinput);
3098: } else {
3099: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
3100: "while attempting inc\n", $userinput);
3101: }
3102: } else {
3103: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3104: "while attempting inc\n", $userinput);
3105: }
3106: } else {
3107: &Failure($client, "refused\n", $userinput);
3108: }
3109:
3110: return 1;
3111: }
3112: ®ister_handler("inc", \&increment_user_value_handler, 0, 1, 0);
3113:
3114: #
3115: # Put a new role for a user. Roles are LonCAPA's packaging of permissions.
3116: # Each 'role' a user has implies a set of permissions. Adding a new role
3117: # for a person grants the permissions packaged with that role
3118: # to that user when the role is selected.
3119: #
3120: # Parameters:
3121: # $cmd - The command string (rolesput).
3122: # $tail - The remainder of the request line. For rolesput this
3123: # consists of a colon separated list that contains:
3124: # The domain and user that is granting the role (logged).
3125: # The domain and user that is getting the role.
3126: # The roles being granted as a set of & separated pairs.
3127: # each pair a key value pair.
3128: # $client - File descriptor connected to the client.
3129: # Returns:
3130: # 0 - If the daemon should exit
3131: # 1 - To continue processing.
3132: #
3133: #
3134: sub roles_put_handler {
3135: my ($cmd, $tail, $client) = @_;
3136:
3137: my $userinput = "$cmd:$tail";
3138:
3139: my ( $exedom, $exeuser, $udom, $uname, $what) = split(/:/,$tail);
3140:
3141:
3142: my $namespace='roles';
3143: chomp($what);
3144: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3145: &GDBM_WRCREAT(), "P",
3146: "$exedom:$exeuser:$what");
3147: #
3148: # Log the attempt to set a role. The {}'s here ensure that the file
3149: # handle is open for the minimal amount of time. Since the flush
3150: # is done on close this improves the chances the log will be an un-
3151: # corrupted ordered thing.
3152: if ($hashref) {
3153: my $pass_entry = &get_auth_type($udom, $uname);
3154: my ($auth_type,$pwd) = split(/:/, $pass_entry);
3155: $auth_type = $auth_type.":";
3156: my @pairs=split(/\&/,$what);
3157: foreach my $pair (@pairs) {
3158: my ($key,$value)=split(/=/,$pair);
3159: &manage_permissions($key, $udom, $uname,
3160: $auth_type);
3161: $hashref->{$key}=$value;
3162: }
3163: if (&untie_user_hash($hashref)) {
3164: &Reply($client, "ok\n", $userinput);
3165: } else {
3166: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3167: "while attempting rolesput\n", $userinput);
3168: }
3169: } else {
3170: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3171: "while attempting rolesput\n", $userinput);
3172: }
3173: return 1;
3174: }
3175: ®ister_handler("rolesput", \&roles_put_handler, 1,1,0); # Encoded client only.
3176:
3177: #
3178: # Deletes (removes) a role for a user. This is equivalent to removing
3179: # a permissions package associated with the role from the user's profile.
3180: #
3181: # Parameters:
3182: # $cmd - The command (rolesdel)
3183: # $tail - The remainder of the request line. This consists
3184: # of:
3185: # The domain and user requesting the change (logged)
3186: # The domain and user being changed.
3187: # The roles being revoked. These are shipped to us
3188: # as a bunch of & separated role name keywords.
3189: # $client - The file handle open on the client.
3190: # Returns:
3191: # 1 - Continue processing
3192: # 0 - Exit.
3193: #
3194: sub roles_delete_handler {
3195: my ($cmd, $tail, $client) = @_;
3196:
3197: my $userinput = "$cmd:$tail";
3198:
3199: my ($exedom,$exeuser,$udom,$uname,$what)=split(/:/,$tail);
3200: &Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom.
3201: "what = ".$what);
3202: my $namespace='roles';
3203: chomp($what);
3204: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3205: &GDBM_WRCREAT(), "D",
3206: "$exedom:$exeuser:$what");
3207:
3208: if ($hashref) {
3209: my @rolekeys=split(/\&/,$what);
3210:
3211: foreach my $key (@rolekeys) {
3212: delete $hashref->{$key};
3213: }
3214: if (&untie_user_hash($hashref)) {
3215: &Reply($client, "ok\n", $userinput);
3216: } else {
3217: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3218: "while attempting rolesdel\n", $userinput);
3219: }
3220: } else {
3221: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3222: "while attempting rolesdel\n", $userinput);
3223: }
3224:
3225: return 1;
3226: }
3227: ®ister_handler("rolesdel", \&roles_delete_handler, 1,1, 0); # Encoded client only
3228:
3229: # Unencrypted get from a user's profile database. See
3230: # GetProfileEntryEncrypted for a version that does end-to-end encryption.
3231: # This function retrieves a keyed item from a specific named database in the
3232: # user's directory.
3233: #
3234: # Parameters:
3235: # $cmd - Command request keyword (get).
3236: # $tail - Tail of the command. This is a colon separated list
3237: # consisting of the domain and username that uniquely
3238: # identifies the profile,
3239: # The 'namespace' which selects the gdbm file to
3240: # do the lookup in,
3241: # & separated list of keys to lookup. Note that
3242: # the values are returned as an & separated list too.
3243: # $client - File descriptor open on the client.
3244: # Returns:
3245: # 1 - Continue processing.
3246: # 0 - Exit.
3247: #
3248: sub get_profile_entry {
3249: my ($cmd, $tail, $client) = @_;
3250:
3251: my $userinput= "$cmd:$tail";
3252:
3253: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
3254: chomp($what);
3255:
3256:
3257: my $replystring = read_profile($udom, $uname, $namespace, $what);
3258: my ($first) = split(/:/,$replystring);
3259: if($first ne "error") {
3260: &Reply($client, \$replystring, $userinput);
3261: } else {
3262: &Failure($client, $replystring." while attempting get\n", $userinput);
3263: }
3264: return 1;
3265:
3266:
3267: }
3268: ®ister_handler("get", \&get_profile_entry, 0,1,0);
3269:
3270: #
3271: # Process the encrypted get request. Note that the request is sent
3272: # in clear, but the reply is encrypted. This is a small covert channel:
3273: # information about the sensitive keys is given to the snooper. Just not
3274: # information about the values of the sensitive key. Hmm if I wanted to
3275: # know these I'd snoop for the egets. Get the profile item names from them
3276: # and then issue a get for them since there's no enforcement of the
3277: # requirement of an encrypted get for particular profile items. If I
3278: # were re-doing this, I'd force the request to be encrypted as well as the
3279: # reply. I'd also just enforce encrypted transactions for all gets since
3280: # that would prevent any covert channel snooping.
3281: #
3282: # Parameters:
3283: # $cmd - Command keyword of request (eget).
3284: # $tail - Tail of the command. See GetProfileEntry
# for more information about this.
3285: # $client - File open on the client.
3286: # Returns:
3287: # 1 - Continue processing
3288: # 0 - server should exit.
3289: sub get_profile_entry_encrypted {
3290: my ($cmd, $tail, $client) = @_;
3291:
3292: my $userinput = "$cmd:$tail";
3293:
3294: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
3295: chomp($what);
3296: my $qresult = read_profile($udom, $uname, $namespace, $what);
3297: my ($first) = split(/:/, $qresult);
3298: if($first ne "error") {
3299:
3300: if ($cipher) {
3301: my $cmdlength=length($qresult);
3302: $qresult.=" ";
3303: my $encqresult='';
3304: for(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
3305: $encqresult.= unpack("H16",
3306: $cipher->encrypt(substr($qresult,
3307: $encidx,
3308: 8)));
3309: }
3310: &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput);
3311: } else {
3312: &Failure( $client, "error:no_key\n", $userinput);
3313: }
3314: } else {
3315: &Failure($client, "$qresult while attempting eget\n", $userinput);
3316:
3317: }
3318:
3319: return 1;
3320: }
3321: ®ister_handler("eget", \&get_profile_entry_encrypted, 0, 1, 0);
3322:
3323: #
3324: # Deletes a key in a user profile database.
3325: #
3326: # Parameters:
3327: # $cmd - Command keyword (del).
3328: # $tail - Command tail. IN this case a colon
3329: # separated list containing:
3330: # The domain and user that identifies uniquely
3331: # the identity of the user.
3332: # The profile namespace (name of the profile
3333: # database file).
3334: # & separated list of keywords to delete.
3335: # $client - File open on client socket.
3336: # Returns:
3337: # 1 - Continue processing
3338: # 0 - Exit server.
3339: #
3340: #
3341: sub delete_profile_entry {
3342: my ($cmd, $tail, $client) = @_;
3343:
3344: my $userinput = "cmd:$tail";
3345:
3346: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
3347: chomp($what);
3348: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3349: &GDBM_WRCREAT(),
3350: "D",$what);
3351: if ($hashref) {
3352: my @keys=split(/\&/,$what);
3353: foreach my $key (@keys) {
3354: delete($hashref->{$key});
3355: }
3356: if (&untie_user_hash($hashref)) {
3357: &Reply($client, "ok\n", $userinput);
3358: } else {
3359: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3360: "while attempting del\n", $userinput);
3361: }
3362: } else {
3363: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3364: "while attempting del\n", $userinput);
3365: }
3366: return 1;
3367: }
3368: ®ister_handler("del", \&delete_profile_entry, 0, 1, 0);
3369:
3370: #
3371: # List the set of keys that are defined in a profile database file.
3372: # A successful reply from this will contain an & separated list of
3373: # the keys.
3374: # Parameters:
3375: # $cmd - Command request (keys).
3376: # $tail - Remainder of the request, a colon separated
3377: # list containing domain/user that identifies the
3378: # user being queried, and the database namespace
3379: # (database filename essentially).
3380: # $client - File open on the client.
3381: # Returns:
3382: # 1 - Continue processing.
3383: # 0 - Exit the server.
3384: #
3385: sub get_profile_keys {
3386: my ($cmd, $tail, $client) = @_;
3387:
3388: my $userinput = "$cmd:$tail";
3389:
3390: my ($udom,$uname,$namespace)=split(/:/,$tail);
3391: my $qresult='';
3392: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3393: &GDBM_READER());
3394: if ($hashref) {
3395: foreach my $key (keys %$hashref) {
3396: $qresult.="$key&";
3397: }
3398: if (&untie_user_hash($hashref)) {
3399: $qresult=~s/\&$//;
3400: &Reply($client, \$qresult, $userinput);
3401: } else {
3402: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3403: "while attempting keys\n", $userinput);
3404: }
3405: } else {
3406: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3407: "while attempting keys\n", $userinput);
3408: }
3409:
3410: return 1;
3411: }
3412: ®ister_handler("keys", \&get_profile_keys, 0, 1, 0);
3413:
3414: #
3415: # Dump the contents of a user profile database.
3416: # Note that this constitutes a very large covert channel too since
3417: # the dump will return sensitive information that is not encrypted.
3418: # The naive security assumption is that the session negotiation ensures
3419: # our client is trusted and I don't believe that's assured at present.
3420: # Sure want badly to go to ssl or tls. Of course if my peer isn't really
3421: # a LonCAPA node they could have negotiated an encryption key too so >sigh<.
3422: #
3423: # Parameters:
3424: # $cmd - The command request keyword (currentdump).
3425: # $tail - Remainder of the request, consisting of a colon
3426: # separated list that has the domain/username and
3427: # the namespace to dump (database file).
3428: # $client - file open on the remote client.
3429: # Returns:
3430: # 1 - Continue processing.
3431: # 0 - Exit the server.
3432: #
3433: sub dump_profile_database {
3434: my ($cmd, $tail, $client) = @_;
3435:
3436: my $res = LONCAPA::Lond::dump_profile_database($tail);
3437:
3438: if ($res =~ /^error:/) {
3439: Failure($client, \$res, "$cmd:$tail");
3440: } else {
3441: Reply($client, \$res, "$cmd:$tail");
3442: }
3443:
3444: return 1;
3445:
3446: #TODO remove
3447: my $userinput = "$cmd:$tail";
3448:
3449: my ($udom,$uname,$namespace) = split(/:/,$tail);
3450: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3451: &GDBM_READER());
3452: if ($hashref) {
3453: # Structure of %data:
3454: # $data{$symb}->{$parameter}=$value;
3455: # $data{$symb}->{'v.'.$parameter}=$version;
3456: # since $parameter will be unescaped, we do not
3457: # have to worry about silly parameter names...
3458:
3459: my $qresult='';
3460: my %data = (); # A hash of anonymous hashes..
3461: while (my ($key,$value) = each(%$hashref)) {
3462: my ($v,$symb,$param) = split(/:/,$key);
3463: next if ($v eq 'version' || $symb eq 'keys');
3464: next if (exists($data{$symb}) &&
3465: exists($data{$symb}->{$param}) &&
3466: $data{$symb}->{'v.'.$param} > $v);
3467: $data{$symb}->{$param}=$value;
3468: $data{$symb}->{'v.'.$param}=$v;
3469: }
3470: if (&untie_user_hash($hashref)) {
3471: while (my ($symb,$param_hash) = each(%data)) {
3472: while(my ($param,$value) = each (%$param_hash)){
3473: next if ($param =~ /^v\./); # Ignore versions...
3474: #
3475: # Just dump the symb=value pairs separated by &
3476: #
3477: $qresult.=$symb.':'.$param.'='.$value.'&';
3478: }
3479: }
3480: chop($qresult);
3481: &Reply($client , \$qresult, $userinput);
3482: } else {
3483: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3484: "while attempting currentdump\n", $userinput);
3485: }
3486: } else {
3487: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3488: "while attempting currentdump\n", $userinput);
3489: }
3490:
3491: return 1;
3492: }
3493: ®ister_handler("currentdump", \&dump_profile_database, 0, 1, 0);
3494:
3495: #
3496: # Dump a profile database with an optional regular expression
3497: # to match against the keys. In this dump, no effort is made
3498: # to separate symb from version information. Presumably the
3499: # databases that are dumped by this command are of a different
3500: # structure. Need to look at this and improve the documentation of
3501: # both this and the currentdump handler.
3502: # Parameters:
3503: # $cmd - The command keyword.
3504: # $tail - All of the characters after the $cmd:
3505: # These are expected to be a colon
3506: # separated list containing:
3507: # domain/user - identifying the user.
3508: # namespace - identifying the database.
3509: # regexp - optional regular expression
3510: # that is matched against
3511: # database keywords to do
3512: # selective dumps.
3513: # range - optional range of entries
3514: # e.g., 10-20 would return the
3515: # 10th to 19th items, etc.
3516: # $client - Channel open on the client.
3517: # Returns:
3518: # 1 - Continue processing.
3519: # Side effects:
3520: # response is written to $client.
3521: #
3522: sub dump_with_regexp {
3523: my ($cmd, $tail, $client) = @_;
3524:
3525: my $res = LONCAPA::Lond::dump_with_regexp($tail, $clientversion);
3526:
3527: if ($res =~ /^error:/) {
3528: Failure($client, \$res, "$cmd:$tail");
3529: } else {
3530: Reply($client, \$res, "$cmd:$tail");
3531: }
3532:
3533: return 1;
3534: }
3535: ®ister_handler("dump", \&dump_with_regexp, 0, 1, 0);
3536:
3537: # Store a set of key=value pairs associated with a versioned name.
3538: #
3539: # Parameters:
3540: # $cmd - Request command keyword.
3541: # $tail - Tail of the request. This is a colon
3542: # separated list containing:
3543: # domain/user - User and authentication domain.
3544: # namespace - Name of the database being modified
3545: # rid - Resource keyword to modify.
3546: # what - new value associated with rid.
3547: # laststore - (optional) version=timestamp
3548: # for most recent transaction for rid
3549: # in namespace, when cstore was called
3550: #
3551: # $client - Socket open on the client.
3552: #
3553: #
3554: # Returns:
3555: # 1 (keep on processing).
3556: # Side-Effects:
3557: # Writes to the client
3558: # Successful storage will cause either 'ok', or, if $laststore was included
3559: # in the tail of the request, and the version number for the last transaction
3560: # is larger than the version in $laststore, delay:$numtrans , where $numtrans
3561: # is the number of store evevnts recorded for rid in namespace since
3562: # lonnet::store() was called by the client.
3563: #
3564: sub store_handler {
3565: my ($cmd, $tail, $client) = @_;
3566:
3567: my $userinput = "$cmd:$tail";
3568: chomp($tail);
3569: my ($udom,$uname,$namespace,$rid,$what,$laststore) =split(/:/,$tail);
3570: if ($namespace ne 'roles') {
3571:
3572: my @pairs=split(/\&/,$what);
3573: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3574: &GDBM_WRCREAT(), "S",
3575: "$rid:$what");
3576: if ($hashref) {
3577: my $now = time;
3578: my $numtrans;
3579: if ($laststore) {
3580: my ($previousversion,$previoustime) = split(/\=/,$laststore);
3581: my ($lastversion,$lasttime) = (0,0);
3582: $lastversion = $hashref->{"version:$rid"};
3583: if ($lastversion) {
3584: $lasttime = $hashref->{"$lastversion:$rid:timestamp"};
3585: }
3586: if (($previousversion) && ($previousversion !~ /\D/)) {
3587: if (($lastversion > $previousversion) && ($lasttime >= $previoustime)) {
3588: $numtrans = $lastversion - $previousversion;
3589: }
3590: } elsif ($lastversion) {
3591: $numtrans = $lastversion;
3592: }
3593: if ($numtrans) {
3594: $numtrans =~ s/D//g;
3595: }
3596: }
3597: $hashref->{"version:$rid"}++;
3598: my $version=$hashref->{"version:$rid"};
3599: my $allkeys='';
3600: foreach my $pair (@pairs) {
3601: my ($key,$value)=split(/=/,$pair);
3602: $allkeys.=$key.':';
3603: $hashref->{"$version:$rid:$key"}=$value;
3604: }
3605: $hashref->{"$version:$rid:timestamp"}=$now;
3606: $allkeys.='timestamp';
3607: $hashref->{"$version:keys:$rid"}=$allkeys;
3608: if (&untie_user_hash($hashref)) {
3609: my $msg = 'ok';
3610: if ($numtrans) {
3611: $msg = 'delay:'.$numtrans;
3612: }
3613: &Reply($client, "$msg\n", $userinput);
3614: } else {
3615: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3616: "while attempting store\n", $userinput);
3617: }
3618: } else {
3619: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3620: "while attempting store\n", $userinput);
3621: }
3622: } else {
3623: &Failure($client, "refused\n", $userinput);
3624: }
3625:
3626: return 1;
3627: }
3628: ®ister_handler("store", \&store_handler, 0, 1, 0);
3629:
3630: # Modify a set of key=value pairs associated with a versioned name.
3631: #
3632: # Parameters:
3633: # $cmd - Request command keyword.
3634: # $tail - Tail of the request. This is a colon
3635: # separated list containing:
3636: # domain/user - User and authentication domain.
3637: # namespace - Name of the database being modified
3638: # rid - Resource keyword to modify.
3639: # v - Version item to modify
3640: # what - new value associated with rid.
3641: #
3642: # $client - Socket open on the client.
3643: #
3644: #
3645: # Returns:
3646: # 1 (keep on processing).
3647: # Side-Effects:
3648: # Writes to the client
3649: sub putstore_handler {
3650: my ($cmd, $tail, $client) = @_;
3651:
3652: my $userinput = "$cmd:$tail";
3653:
3654: my ($udom,$uname,$namespace,$rid,$v,$what) =split(/:/,$tail);
3655: if ($namespace ne 'roles') {
3656:
3657: chomp($what);
3658: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3659: &GDBM_WRCREAT(), "M",
3660: "$rid:$v:$what");
3661: if ($hashref) {
3662: my $now = time;
3663: my %data = &hash_extract($what);
3664: my @allkeys;
3665: while (my($key,$value) = each(%data)) {
3666: push(@allkeys,$key);
3667: $hashref->{"$v:$rid:$key"} = $value;
3668: }
3669: my $allkeys = join(':',@allkeys);
3670: $hashref->{"$v:keys:$rid"}=$allkeys;
3671:
3672: if (&untie_user_hash($hashref)) {
3673: &Reply($client, "ok\n", $userinput);
3674: } else {
3675: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3676: "while attempting store\n", $userinput);
3677: }
3678: } else {
3679: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3680: "while attempting store\n", $userinput);
3681: }
3682: } else {
3683: &Failure($client, "refused\n", $userinput);
3684: }
3685:
3686: return 1;
3687: }
3688: ®ister_handler("putstore", \&putstore_handler, 0, 1, 0);
3689:
3690: sub hash_extract {
3691: my ($str)=@_;
3692: my %hash;
3693: foreach my $pair (split(/\&/,$str)) {
3694: my ($key,$value)=split(/=/,$pair);
3695: $hash{$key}=$value;
3696: }
3697: return (%hash);
3698: }
3699: sub hash_to_str {
3700: my ($hash_ref)=@_;
3701: my $str;
3702: foreach my $key (keys(%$hash_ref)) {
3703: $str.=$key.'='.$hash_ref->{$key}.'&';
3704: }
3705: $str=~s/\&$//;
3706: return $str;
3707: }
3708:
3709: #
3710: # Dump out all versions of a resource that has key=value pairs associated
3711: # with it for each version. These resources are built up via the store
3712: # command.
3713: #
3714: # Parameters:
3715: # $cmd - Command keyword.
3716: # $tail - Remainder of the request which consists of:
3717: # domain/user - User and auth. domain.
3718: # namespace - name of resource database.
3719: # rid - Resource id.
3720: # $client - socket open on the client.
3721: #
3722: # Returns:
3723: # 1 indicating the caller should not yet exit.
3724: # Side-effects:
3725: # Writes a reply to the client.
3726: # The reply is a string of the following shape:
3727: # version=current&version:keys=k1:k2...&1:k1=v1&1:k2=v2...
3728: # Where the 1 above represents version 1.
3729: # this continues for all pairs of keys in all versions.
3730: #
3731: #
3732: #
3733: #
3734: sub restore_handler {
3735: my ($cmd, $tail, $client) = @_;
3736:
3737: my $userinput = "$cmd:$tail"; # Only used for logging purposes.
3738: my ($udom,$uname,$namespace,$rid) = split(/:/,$tail);
3739: $namespace=~s/\//\_/g;
3740: $namespace = &LONCAPA::clean_username($namespace);
3741:
3742: chomp($rid);
3743: my $qresult='';
3744: my $hashref = &tie_user_hash($udom, $uname, $namespace, &GDBM_READER());
3745: if ($hashref) {
3746: my $version=$hashref->{"version:$rid"};
3747: $qresult.="version=$version&";
3748: my $scope;
3749: for ($scope=1;$scope<=$version;$scope++) {
3750: my $vkeys=$hashref->{"$scope:keys:$rid"};
3751: my @keys=split(/:/,$vkeys);
3752: my $key;
3753: $qresult.="$scope:keys=$vkeys&";
3754: foreach $key (@keys) {
3755: $qresult.="$scope:$key=".$hashref->{"$scope:$rid:$key"}."&";
3756: }
3757: }
3758: if (&untie_user_hash($hashref)) {
3759: $qresult=~s/\&$//;
3760: &Reply( $client, \$qresult, $userinput);
3761: } else {
3762: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3763: "while attempting restore\n", $userinput);
3764: }
3765: } else {
3766: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3767: "while attempting restore\n", $userinput);
3768: }
3769:
3770: return 1;
3771:
3772:
3773: }
3774: ®ister_handler("restore", \&restore_handler, 0,1,0);
3775:
3776: #
3777: # Add a chat message to a synchronous discussion board.
3778: #
3779: # Parameters:
3780: # $cmd - Request keyword.
3781: # $tail - Tail of the command. A colon separated list
3782: # containing:
3783: # cdom - Domain on which the chat board lives
3784: # cnum - Course containing the chat board.
3785: # newpost - Body of the posting.
3786: # group - Optional group, if chat board is only
3787: # accessible in a group within the course
3788: # $client - Socket open on the client.
3789: # Returns:
3790: # 1 - Indicating caller should keep on processing.
3791: #
3792: # Side-effects:
3793: # writes a reply to the client.
3794: #
3795: #
3796: sub send_chat_handler {
3797: my ($cmd, $tail, $client) = @_;
3798:
3799:
3800: my $userinput = "$cmd:$tail";
3801:
3802: my ($cdom,$cnum,$newpost,$group)=split(/\:/,$tail);
3803: &chat_add($cdom,$cnum,$newpost,$group);
3804: &Reply($client, "ok\n", $userinput);
3805:
3806: return 1;
3807: }
3808: ®ister_handler("chatsend", \&send_chat_handler, 0, 1, 0);
3809:
3810: #
3811: # Retrieve the set of chat messages from a discussion board.
3812: #
3813: # Parameters:
3814: # $cmd - Command keyword that initiated the request.
3815: # $tail - Remainder of the request after the command
3816: # keyword. In this case a colon separated list of
3817: # chat domain - Which discussion board.
3818: # chat id - Discussion thread(?)
3819: # domain/user - Authentication domain and username
3820: # of the requesting person.
3821: # group - Optional course group containing
3822: # the board.
3823: # $client - Socket open on the client program.
3824: # Returns:
3825: # 1 - continue processing
3826: # Side effects:
3827: # Response is written to the client.
3828: #
3829: sub retrieve_chat_handler {
3830: my ($cmd, $tail, $client) = @_;
3831:
3832:
3833: my $userinput = "$cmd:$tail";
3834:
3835: my ($cdom,$cnum,$udom,$uname,$group)=split(/\:/,$tail);
3836: my $reply='';
3837: foreach (&get_chat($cdom,$cnum,$udom,$uname,$group)) {
3838: $reply.=&escape($_).':';
3839: }
3840: $reply=~s/\:$//;
3841: &Reply($client, \$reply, $userinput);
3842:
3843:
3844: return 1;
3845: }
3846: ®ister_handler("chatretr", \&retrieve_chat_handler, 0, 1, 0);
3847:
3848: #
3849: # Initiate a query of an sql database. SQL query repsonses get put in
3850: # a file for later retrieval. This prevents sql query results from
3851: # bottlenecking the system. Note that with loncnew, perhaps this is
3852: # less of an issue since multiple outstanding requests can be concurrently
3853: # serviced.
3854: #
3855: # Parameters:
3856: # $cmd - COmmand keyword that initiated the request.
3857: # $tail - Remainder of the command after the keyword.
3858: # For this function, this consists of a query and
3859: # 3 arguments that are self-documentingly labelled
3860: # in the original arg1, arg2, arg3.
3861: # $client - Socket open on the client.
3862: # Return:
3863: # 1 - Indicating processing should continue.
3864: # Side-effects:
3865: # a reply is written to $client.
3866: #
3867: sub send_query_handler {
3868: my ($cmd, $tail, $client) = @_;
3869:
3870:
3871: my $userinput = "$cmd:$tail";
3872:
3873: my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail);
3874: $query=~s/\n*$//g;
3875: &Reply($client, "". &sql_reply("$clientname\&$query".
3876: "\&$arg1"."\&$arg2"."\&$arg3")."\n",
3877: $userinput);
3878:
3879: return 1;
3880: }
3881: ®ister_handler("querysend", \&send_query_handler, 0, 1, 0);
3882:
3883: #
3884: # Add a reply to an sql query. SQL queries are done asyncrhonously.
3885: # The query is submitted via a "querysend" transaction.
3886: # There it is passed on to the lonsql daemon, queued and issued to
3887: # mysql.
3888: # This transaction is invoked when the sql transaction is complete
3889: # it stores the query results in flie and indicates query completion.
3890: # presumably local software then fetches this response... I'm guessing
3891: # the sequence is: lonc does a querysend, we ask lonsql to do it.
3892: # lonsql on completion of the query interacts with the lond of our
3893: # client to do a query reply storing two files:
3894: # - id - The results of the query.
3895: # - id.end - Indicating the transaction completed.
3896: # NOTE: id is a unique id assigned to the query and querysend time.
3897: # Parameters:
3898: # $cmd - Command keyword that initiated this request.
3899: # $tail - Remainder of the tail. In this case that's a colon
3900: # separated list containing the query Id and the
3901: # results of the query.
3902: # $client - Socket open on the client.
3903: # Return:
3904: # 1 - Indicating that we should continue processing.
3905: # Side effects:
3906: # ok written to the client.
3907: #
3908: sub reply_query_handler {
3909: my ($cmd, $tail, $client) = @_;
3910:
3911:
3912: my $userinput = "$cmd:$tail";
3913:
3914: my ($id,$reply)=split(/:/,$tail);
3915: my $store;
3916: my $execdir=$perlvar{'lonDaemons'};
3917: if ($store=IO::File->new(">$execdir/tmp/$id")) {
3918: $reply=~s/\&/\n/g;
3919: print $store $reply;
3920: close $store;
3921: my $store2=IO::File->new(">$execdir/tmp/$id.end");
3922: print $store2 "done\n";
3923: close $store2;
3924: &Reply($client, "ok\n", $userinput);
3925: } else {
3926: &Failure($client, "error: ".($!+0)
3927: ." IO::File->new Failed ".
3928: "while attempting queryreply\n", $userinput);
3929: }
3930:
3931:
3932: return 1;
3933: }
3934: ®ister_handler("queryreply", \&reply_query_handler, 0, 1, 0);
3935:
3936: #
3937: # Process the courseidput request. Not quite sure what this means
3938: # at the system level sense. It appears a gdbm file in the
3939: # /home/httpd/lonUsers/$domain/nohist_courseids is tied and
3940: # a set of entries made in that database.
3941: #
3942: # Parameters:
3943: # $cmd - The command keyword that initiated this request.
3944: # $tail - Tail of the command. In this case consists of a colon
3945: # separated list contaning the domain to apply this to and
3946: # an ampersand separated list of keyword=value pairs.
3947: # Each value is a colon separated list that includes:
3948: # description, institutional code and course owner.
3949: # For backward compatibility with versions included
3950: # in LON-CAPA 1.1.X (and earlier) and 1.2.X, institutional
3951: # code and/or course owner are preserved from the existing
3952: # record when writing a new record in response to 1.1 or
3953: # 1.2 implementations of lonnet::flushcourselogs().
3954: #
3955: # $client - Socket open on the client.
3956: # Returns:
3957: # 1 - indicating that processing should continue
3958: #
3959: # Side effects:
3960: # reply is written to the client.
3961: #
3962: sub put_course_id_handler {
3963: my ($cmd, $tail, $client) = @_;
3964:
3965:
3966: my $userinput = "$cmd:$tail";
3967:
3968: my ($udom, $what) = split(/:/, $tail,2);
3969: chomp($what);
3970: my $now=time;
3971: my @pairs=split(/\&/,$what);
3972:
3973: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3974: if ($hashref) {
3975: foreach my $pair (@pairs) {
3976: my ($key,$courseinfo) = split(/=/,$pair,2);
3977: $courseinfo =~ s/=/:/g;
3978: if (defined($hashref->{$key})) {
3979: my $value = &Apache::lonnet::thaw_unescape($hashref->{$key});
3980: if (ref($value) eq 'HASH') {
3981: my @items = ('description','inst_code','owner','type');
3982: my @new_items = split(/:/,$courseinfo,-1);
3983: my %storehash;
3984: for (my $i=0; $i<@new_items; $i++) {
3985: $storehash{$items[$i]} = &unescape($new_items[$i]);
3986: }
3987: $hashref->{$key} =
3988: &Apache::lonnet::freeze_escape(\%storehash);
3989: my $unesc_key = &unescape($key);
3990: $hashref->{&escape('lasttime:'.$unesc_key)} = $now;
3991: next;
3992: }
3993: }
3994: my @current_items = split(/:/,$hashref->{$key},-1);
3995: shift(@current_items); # remove description
3996: pop(@current_items); # remove last access
3997: my $numcurrent = scalar(@current_items);
3998: if ($numcurrent > 3) {
3999: $numcurrent = 3;
4000: }
4001: my @new_items = split(/:/,$courseinfo,-1);
4002: my $numnew = scalar(@new_items);
4003: if ($numcurrent > 0) {
4004: if ($numnew <= $numcurrent) { # flushcourselogs() from pre 2.2
4005: for (my $j=$numcurrent-$numnew; $j>=0; $j--) {
4006: $courseinfo .= ':'.$current_items[$numcurrent-$j-1];
4007: }
4008: }
4009: }
4010: $hashref->{$key}=$courseinfo.':'.$now;
4011: }
4012: if (&untie_domain_hash($hashref)) {
4013: &Reply( $client, "ok\n", $userinput);
4014: } else {
4015: &Failure($client, "error: ".($!+0)
4016: ." untie(GDBM) Failed ".
4017: "while attempting courseidput\n", $userinput);
4018: }
4019: } else {
4020: &Failure($client, "error: ".($!+0)
4021: ." tie(GDBM) Failed ".
4022: "while attempting courseidput\n", $userinput);
4023: }
4024:
4025: return 1;
4026: }
4027: ®ister_handler("courseidput", \&put_course_id_handler, 0, 1, 0);
4028:
4029: sub put_course_id_hash_handler {
4030: my ($cmd, $tail, $client) = @_;
4031: my $userinput = "$cmd:$tail";
4032: my ($udom,$mode,$what) = split(/:/, $tail,3);
4033: chomp($what);
4034: my $now=time;
4035: my @pairs=split(/\&/,$what);
4036: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
4037: if ($hashref) {
4038: foreach my $pair (@pairs) {
4039: my ($key,$value)=split(/=/,$pair);
4040: my $unesc_key = &unescape($key);
4041: if ($mode ne 'timeonly') {
4042: if (!defined($hashref->{&escape('lasttime:'.$unesc_key)})) {
4043: my $curritems = &Apache::lonnet::thaw_unescape($key);
4044: if (ref($curritems) ne 'HASH') {
4045: my @current_items = split(/:/,$hashref->{$key},-1);
4046: my $lasttime = pop(@current_items);
4047: $hashref->{&escape('lasttime:'.$unesc_key)} = $lasttime;
4048: } else {
4049: $hashref->{&escape('lasttime:'.$unesc_key)} = '';
4050: }
4051: }
4052: $hashref->{$key} = $value;
4053: }
4054: if ($mode ne 'notime') {
4055: $hashref->{&escape('lasttime:'.$unesc_key)} = $now;
4056: }
4057: }
4058: if (&untie_domain_hash($hashref)) {
4059: &Reply($client, "ok\n", $userinput);
4060: } else {
4061: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4062: "while attempting courseidputhash\n", $userinput);
4063: }
4064: } else {
4065: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4066: "while attempting courseidputhash\n", $userinput);
4067: }
4068: return 1;
4069: }
4070: ®ister_handler("courseidputhash", \&put_course_id_hash_handler, 0, 1, 0);
4071:
4072: # Retrieves the value of a course id resource keyword pattern
4073: # defined since a starting date. Both the starting date and the
4074: # keyword pattern are optional. If the starting date is not supplied it
4075: # is treated as the beginning of time. If the pattern is not found,
4076: # it is treatred as "." matching everything.
4077: #
4078: # Parameters:
4079: # $cmd - Command keyword that resulted in us being dispatched.
4080: # $tail - The remainder of the command that, in this case, consists
4081: # of a colon separated list of:
4082: # domain - The domain in which the course database is
4083: # defined.
4084: # since - Optional parameter describing the minimum
4085: # time of definition(?) of the resources that
4086: # will match the dump.
4087: # description - regular expression that is used to filter
4088: # the dump. Only keywords matching this regexp
4089: # will be used.
4090: # institutional code - optional supplied code to filter
4091: # the dump. Only courses with an institutional code
4092: # that match the supplied code will be returned.
4093: # owner - optional supplied username and domain of owner to
4094: # filter the dump. Only courses for which the course
4095: # owner matches the supplied username and/or domain
4096: # will be returned. Pre-2.2.0 legacy entries from
4097: # nohist_courseiddump will only contain usernames.
4098: # type - optional parameter for selection
4099: # regexp_ok - if 1 or -1 allow the supplied institutional code
4100: # filter to behave as a regular expression:
4101: # 1 will not exclude the course if the instcode matches the RE
4102: # -1 will exclude the course if the instcode matches the RE
4103: # rtn_as_hash - whether to return the information available for
4104: # each matched item as a frozen hash of all
4105: # key, value pairs in the item's hash, or as a
4106: # colon-separated list of (in order) description,
4107: # institutional code, and course owner.
4108: # selfenrollonly - filter by courses allowing self-enrollment
4109: # now or in the future (selfenrollonly = 1).
4110: # catfilter - filter by course category, assigned to a course
4111: # using manually defined categories (i.e., not
4112: # self-cataloging based on on institutional code).
4113: # showhidden - include course in results even if course
4114: # was set to be excluded from course catalog (DC only).
4115: # caller - if set to 'coursecatalog', courses set to be hidden
4116: # from course catalog will be excluded from results (unless
4117: # overridden by "showhidden".
4118: # cloner - escaped username:domain of course cloner (if picking course to
4119: # clone).
4120: # cc_clone_list - escaped comma separated list of courses for which
4121: # course cloner has active CC role (and so can clone
4122: # automatically).
4123: # cloneonly - filter by courses for which cloner has rights to clone.
4124: # createdbefore - include courses for which creation date preceeded this date.
4125: # createdafter - include courses for which creation date followed this date.
4126: # creationcontext - include courses created in specified context
4127: #
4128: # domcloner - flag to indicate if user can create CCs in course's domain.
4129: # If so, ability to clone course is automatic.
4130: # hasuniquecode - filter by courses for which a six character unique code has
4131: # been set.
4132: #
4133: # $client - The socket open on the client.
4134: # Returns:
4135: # 1 - Continue processing.
4136: # Side Effects:
4137: # a reply is written to $client.
4138: sub dump_course_id_handler {
4139: my ($cmd, $tail, $client) = @_;
4140:
4141: my $res = LONCAPA::Lond::dump_course_id_handler($tail);
4142: if ($res =~ /^error:/) {
4143: Failure($client, \$res, "$cmd:$tail");
4144: } else {
4145: Reply($client, \$res, "$cmd:$tail");
4146: }
4147:
4148: return 1;
4149:
4150: #TODO remove
4151: my $userinput = "$cmd:$tail";
4152:
4153: my ($udom,$since,$description,$instcodefilter,$ownerfilter,$coursefilter,
4154: $typefilter,$regexp_ok,$rtn_as_hash,$selfenrollonly,$catfilter,$showhidden,
4155: $caller,$cloner,$cc_clone_list,$cloneonly,$createdbefore,$createdafter,
4156: $creationcontext,$domcloner,$hasuniquecode) =split(/:/,$tail);
4157: my $now = time;
4158: my ($cloneruname,$clonerudom,%cc_clone);
4159: if (defined($description)) {
4160: $description=&unescape($description);
4161: } else {
4162: $description='.';
4163: }
4164: if (defined($instcodefilter)) {
4165: $instcodefilter=&unescape($instcodefilter);
4166: } else {
4167: $instcodefilter='.';
4168: }
4169: my ($ownerunamefilter,$ownerdomfilter);
4170: if (defined($ownerfilter)) {
4171: $ownerfilter=&unescape($ownerfilter);
4172: if ($ownerfilter ne '.' && defined($ownerfilter)) {
4173: if ($ownerfilter =~ /^([^:]*):([^:]*)$/) {
4174: $ownerunamefilter = $1;
4175: $ownerdomfilter = $2;
4176: } else {
4177: $ownerunamefilter = $ownerfilter;
4178: $ownerdomfilter = '';
4179: }
4180: }
4181: } else {
4182: $ownerfilter='.';
4183: }
4184:
4185: if (defined($coursefilter)) {
4186: $coursefilter=&unescape($coursefilter);
4187: } else {
4188: $coursefilter='.';
4189: }
4190: if (defined($typefilter)) {
4191: $typefilter=&unescape($typefilter);
4192: } else {
4193: $typefilter='.';
4194: }
4195: if (defined($regexp_ok)) {
4196: $regexp_ok=&unescape($regexp_ok);
4197: }
4198: if (defined($catfilter)) {
4199: $catfilter=&unescape($catfilter);
4200: }
4201: if (defined($cloner)) {
4202: $cloner = &unescape($cloner);
4203: ($cloneruname,$clonerudom) = ($cloner =~ /^($LONCAPA::match_username):($LONCAPA::match_domain)$/);
4204: }
4205: if (defined($cc_clone_list)) {
4206: $cc_clone_list = &unescape($cc_clone_list);
4207: my @cc_cloners = split('&',$cc_clone_list);
4208: foreach my $cid (@cc_cloners) {
4209: my ($clonedom,$clonenum) = split(':',$cid);
4210: next if ($clonedom ne $udom);
4211: $cc_clone{$clonedom.'_'.$clonenum} = 1;
4212: }
4213: }
4214: if ($createdbefore ne '') {
4215: $createdbefore = &unescape($createdbefore);
4216: } else {
4217: $createdbefore = 0;
4218: }
4219: if ($createdafter ne '') {
4220: $createdafter = &unescape($createdafter);
4221: } else {
4222: $createdafter = 0;
4223: }
4224: if ($creationcontext ne '') {
4225: $creationcontext = &unescape($creationcontext);
4226: } else {
4227: $creationcontext = '.';
4228: }
4229: unless ($hasuniquecode) {
4230: $hasuniquecode = '.';
4231: }
4232: my $unpack = 1;
4233: if ($description eq '.' && $instcodefilter eq '.' && $ownerfilter eq '.' &&
4234: $typefilter eq '.') {
4235: $unpack = 0;
4236: }
4237: if (!defined($since)) { $since=0; }
4238: my $qresult='';
4239: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
4240: if ($hashref) {
4241: while (my ($key,$value) = each(%$hashref)) {
4242: my ($unesc_key,$lasttime_key,$lasttime,$is_hash,%val,
4243: %unesc_val,$selfenroll_end,$selfenroll_types,$created,
4244: $context);
4245: $unesc_key = &unescape($key);
4246: if ($unesc_key =~ /^lasttime:/) {
4247: next;
4248: } else {
4249: $lasttime_key = &escape('lasttime:'.$unesc_key);
4250: }
4251: if ($hashref->{$lasttime_key} ne '') {
4252: $lasttime = $hashref->{$lasttime_key};
4253: next if ($lasttime<$since);
4254: }
4255: my ($canclone,$valchange);
4256: my $items = &Apache::lonnet::thaw_unescape($value);
4257: if (ref($items) eq 'HASH') {
4258: if ($hashref->{$lasttime_key} eq '') {
4259: next if ($since > 1);
4260: }
4261: $is_hash = 1;
4262: if ($domcloner) {
4263: $canclone = 1;
4264: } elsif (defined($clonerudom)) {
4265: if ($items->{'cloners'}) {
4266: my @cloneable = split(',',$items->{'cloners'});
4267: if (@cloneable) {
4268: if (grep(/^\*$/,@cloneable)) {
4269: $canclone = 1;
4270: } elsif (grep(/^\*:\Q$clonerudom\E$/,@cloneable)) {
4271: $canclone = 1;
4272: } elsif (grep(/^\Q$cloneruname\E:\Q$clonerudom\E$/,@cloneable)) {
4273: $canclone = 1;
4274: }
4275: }
4276: unless ($canclone) {
4277: if ($cloneruname ne '' && $clonerudom ne '') {
4278: if ($cc_clone{$unesc_key}) {
4279: $canclone = 1;
4280: $items->{'cloners'} .= ','.$cloneruname.':'.
4281: $clonerudom;
4282: $valchange = 1;
4283: }
4284: }
4285: }
4286: } elsif (defined($cloneruname)) {
4287: if ($cc_clone{$unesc_key}) {
4288: $canclone = 1;
4289: $items->{'cloners'} = $cloneruname.':'.$clonerudom;
4290: $valchange = 1;
4291: }
4292: unless ($canclone) {
4293: if ($items->{'owner'} =~ /:/) {
4294: if ($items->{'owner'} eq $cloner) {
4295: $canclone = 1;
4296: }
4297: } elsif ($cloner eq $items->{'owner'}.':'.$udom) {
4298: $canclone = 1;
4299: }
4300: if ($canclone) {
4301: $items->{'cloners'} = $cloneruname.':'.$clonerudom;
4302: $valchange = 1;
4303: }
4304: }
4305: }
4306: }
4307: if ($unpack || !$rtn_as_hash) {
4308: $unesc_val{'descr'} = $items->{'description'};
4309: $unesc_val{'inst_code'} = $items->{'inst_code'};
4310: $unesc_val{'owner'} = $items->{'owner'};
4311: $unesc_val{'type'} = $items->{'type'};
4312: $unesc_val{'cloners'} = $items->{'cloners'};
4313: $unesc_val{'created'} = $items->{'created'};
4314: $unesc_val{'context'} = $items->{'context'};
4315: }
4316: $selfenroll_types = $items->{'selfenroll_types'};
4317: $selfenroll_end = $items->{'selfenroll_end_date'};
4318: $created = $items->{'created'};
4319: $context = $items->{'context'};
4320: if ($hasuniquecode ne '.') {
4321: next unless ($items->{'uniquecode'});
4322: }
4323: if ($selfenrollonly) {
4324: next if (!$selfenroll_types);
4325: if (($selfenroll_end > 0) && ($selfenroll_end <= $now)) {
4326: next;
4327: }
4328: }
4329: if ($creationcontext ne '.') {
4330: next if (($context ne '') && ($context ne $creationcontext));
4331: }
4332: if ($createdbefore > 0) {
4333: next if (($created eq '') || ($created > $createdbefore));
4334: }
4335: if ($createdafter > 0) {
4336: next if (($created eq '') || ($created <= $createdafter));
4337: }
4338: if ($catfilter ne '') {
4339: next if ($items->{'categories'} eq '');
4340: my @categories = split('&',$items->{'categories'});
4341: next if (@categories == 0);
4342: my @subcats = split('&',$catfilter);
4343: my $matchcat = 0;
4344: foreach my $cat (@categories) {
4345: if (grep(/^\Q$cat\E$/,@subcats)) {
4346: $matchcat = 1;
4347: last;
4348: }
4349: }
4350: next if (!$matchcat);
4351: }
4352: if ($caller eq 'coursecatalog') {
4353: if ($items->{'hidefromcat'} eq 'yes') {
4354: next if !$showhidden;
4355: }
4356: }
4357: } else {
4358: next if ($catfilter ne '');
4359: next if ($selfenrollonly);
4360: next if ($createdbefore || $createdafter);
4361: next if ($creationcontext ne '.');
4362: if ((defined($clonerudom)) && (defined($cloneruname))) {
4363: if ($cc_clone{$unesc_key}) {
4364: $canclone = 1;
4365: $val{'cloners'} = &escape($cloneruname.':'.$clonerudom);
4366: }
4367: }
4368: $is_hash = 0;
4369: my @courseitems = split(/:/,$value);
4370: $lasttime = pop(@courseitems);
4371: if ($hashref->{$lasttime_key} eq '') {
4372: next if ($lasttime<$since);
4373: }
4374: ($val{'descr'},$val{'inst_code'},$val{'owner'},$val{'type'}) = @courseitems;
4375: }
4376: if ($cloneonly) {
4377: next unless ($canclone);
4378: }
4379: my $match = 1;
4380: if ($description ne '.') {
4381: if (!$is_hash) {
4382: $unesc_val{'descr'} = &unescape($val{'descr'});
4383: }
4384: if (eval{$unesc_val{'descr'} !~ /\Q$description\E/i}) {
4385: $match = 0;
4386: }
4387: }
4388: if ($instcodefilter ne '.') {
4389: if (!$is_hash) {
4390: $unesc_val{'inst_code'} = &unescape($val{'inst_code'});
4391: }
4392: if ($regexp_ok == 1) {
4393: if (eval{$unesc_val{'inst_code'} !~ /$instcodefilter/}) {
4394: $match = 0;
4395: }
4396: } elsif ($regexp_ok == -1) {
4397: if (eval{$unesc_val{'inst_code'} =~ /$instcodefilter/}) {
4398: $match = 0;
4399: }
4400: } else {
4401: if (eval{$unesc_val{'inst_code'} !~ /\Q$instcodefilter\E/i}) {
4402: $match = 0;
4403: }
4404: }
4405: }
4406: if ($ownerfilter ne '.') {
4407: if (!$is_hash) {
4408: $unesc_val{'owner'} = &unescape($val{'owner'});
4409: }
4410: if (($ownerunamefilter ne '') && ($ownerdomfilter ne '')) {
4411: if ($unesc_val{'owner'} =~ /:/) {
4412: if (eval{$unesc_val{'owner'} !~
4413: /\Q$ownerunamefilter\E:\Q$ownerdomfilter\E$/i}) {
4414: $match = 0;
4415: }
4416: } else {
4417: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) {
4418: $match = 0;
4419: }
4420: }
4421: } elsif ($ownerunamefilter ne '') {
4422: if ($unesc_val{'owner'} =~ /:/) {
4423: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E:[^:]+$/i}) {
4424: $match = 0;
4425: }
4426: } else {
4427: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) {
4428: $match = 0;
4429: }
4430: }
4431: } elsif ($ownerdomfilter ne '') {
4432: if ($unesc_val{'owner'} =~ /:/) {
4433: if (eval{$unesc_val{'owner'} !~ /^[^:]+:\Q$ownerdomfilter\E/}) {
4434: $match = 0;
4435: }
4436: } else {
4437: if ($ownerdomfilter ne $udom) {
4438: $match = 0;
4439: }
4440: }
4441: }
4442: }
4443: if ($coursefilter ne '.') {
4444: if (eval{$unesc_key !~ /^$udom(_)\Q$coursefilter\E$/}) {
4445: $match = 0;
4446: }
4447: }
4448: if ($typefilter ne '.') {
4449: if (!$is_hash) {
4450: $unesc_val{'type'} = &unescape($val{'type'});
4451: }
4452: if ($unesc_val{'type'} eq '') {
4453: if ($typefilter ne 'Course') {
4454: $match = 0;
4455: }
4456: } else {
4457: if (eval{$unesc_val{'type'} !~ /^\Q$typefilter\E$/}) {
4458: $match = 0;
4459: }
4460: }
4461: }
4462: if ($match == 1) {
4463: if ($rtn_as_hash) {
4464: if ($is_hash) {
4465: if ($valchange) {
4466: my $newvalue = &Apache::lonnet::freeze_escape($items);
4467: $qresult.=$key.'='.$newvalue.'&';
4468: } else {
4469: $qresult.=$key.'='.$value.'&';
4470: }
4471: } else {
4472: my %rtnhash = ( 'description' => &unescape($val{'descr'}),
4473: 'inst_code' => &unescape($val{'inst_code'}),
4474: 'owner' => &unescape($val{'owner'}),
4475: 'type' => &unescape($val{'type'}),
4476: 'cloners' => &unescape($val{'cloners'}),
4477: );
4478: my $items = &Apache::lonnet::freeze_escape(\%rtnhash);
4479: $qresult.=$key.'='.$items.'&';
4480: }
4481: } else {
4482: if ($is_hash) {
4483: $qresult .= $key.'='.&escape($unesc_val{'descr'}).':'.
4484: &escape($unesc_val{'inst_code'}).':'.
4485: &escape($unesc_val{'owner'}).'&';
4486: } else {
4487: $qresult .= $key.'='.$val{'descr'}.':'.$val{'inst_code'}.
4488: ':'.$val{'owner'}.'&';
4489: }
4490: }
4491: }
4492: }
4493: if (&untie_domain_hash($hashref)) {
4494: chop($qresult);
4495: &Reply($client, \$qresult, $userinput);
4496: } else {
4497: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4498: "while attempting courseiddump\n", $userinput);
4499: }
4500: } else {
4501: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4502: "while attempting courseiddump\n", $userinput);
4503: }
4504: return 1;
4505: }
4506: ®ister_handler("courseiddump", \&dump_course_id_handler, 0, 1, 0);
4507:
4508: sub course_lastaccess_handler {
4509: my ($cmd, $tail, $client) = @_;
4510: my $userinput = "$cmd:$tail";
4511: my ($cdom,$cnum) = split(':',$tail);
4512: my (%lastaccess,$qresult);
4513: my $hashref = &tie_domain_hash($cdom, "nohist_courseids", &GDBM_WRCREAT());
4514: if ($hashref) {
4515: while (my ($key,$value) = each(%$hashref)) {
4516: my ($unesc_key,$lasttime);
4517: $unesc_key = &unescape($key);
4518: if ($cnum) {
4519: next unless ($unesc_key =~ /\Q$cdom\E_\Q$cnum\E$/);
4520: }
4521: if ($unesc_key =~ /^lasttime:($LONCAPA::match_domain\_$LONCAPA::match_courseid)/) {
4522: $lastaccess{$1} = $value;
4523: } else {
4524: my $items = &Apache::lonnet::thaw_unescape($value);
4525: if (ref($items) eq 'HASH') {
4526: unless ($lastaccess{$unesc_key}) {
4527: $lastaccess{$unesc_key} = '';
4528: }
4529: } else {
4530: my @courseitems = split(':',$value);
4531: $lastaccess{$unesc_key} = pop(@courseitems);
4532: }
4533: }
4534: }
4535: foreach my $cid (sort(keys(%lastaccess))) {
4536: $qresult.=&escape($cid).'='.$lastaccess{$cid}.'&';
4537: }
4538: if (&untie_domain_hash($hashref)) {
4539: if ($qresult) {
4540: chop($qresult);
4541: }
4542: &Reply($client, \$qresult, $userinput);
4543: } else {
4544: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4545: "while attempting lastacourseaccess\n", $userinput);
4546: }
4547: } else {
4548: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4549: "while attempting lastcourseaccess\n", $userinput);
4550: }
4551: return 1;
4552: }
4553: ®ister_handler("courselastaccess",\&course_lastaccess_handler, 0, 1, 0);
4554:
4555: #
4556: # Puts an unencrypted entry in a namespace db file at the domain level
4557: #
4558: # Parameters:
4559: # $cmd - The command that got us here.
4560: # $tail - Tail of the command (remaining parameters).
4561: # $client - File descriptor connected to client.
4562: # Returns
4563: # 0 - Requested to exit, caller should shut down.
4564: # 1 - Continue processing.
4565: # Side effects:
4566: # reply is written to $client.
4567: #
4568: sub put_domain_handler {
4569: my ($cmd,$tail,$client) = @_;
4570:
4571: my $userinput = "$cmd:$tail";
4572:
4573: my ($udom,$namespace,$what) =split(/:/,$tail,3);
4574: chomp($what);
4575: my @pairs=split(/\&/,$what);
4576: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_WRCREAT(),
4577: "P", $what);
4578: if ($hashref) {
4579: foreach my $pair (@pairs) {
4580: my ($key,$value)=split(/=/,$pair);
4581: $hashref->{$key}=$value;
4582: }
4583: if (&untie_domain_hash($hashref)) {
4584: &Reply($client, "ok\n", $userinput);
4585: } else {
4586: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4587: "while attempting putdom\n", $userinput);
4588: }
4589: } else {
4590: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4591: "while attempting putdom\n", $userinput);
4592: }
4593:
4594: return 1;
4595: }
4596: ®ister_handler("putdom", \&put_domain_handler, 0, 1, 0);
4597:
4598: # Updates one or more entries in clickers.db file at the domain level
4599: #
4600: # Parameters:
4601: # $cmd - The command that got us here.
4602: # $tail - Tail of the command (remaining parameters).
4603: # In this case a colon separated list containing:
4604: # (a) the domain for which we are updating the entries,
4605: # (b) the action required -- add or del -- and
4606: # (c) a &-separated list of entries to add or delete.
4607: # $client - File descriptor connected to client.
4608: # Returns
4609: # 1 - Continue processing.
4610: # 0 - Requested to exit, caller should shut down.
4611: # Side effects:
4612: # reply is written to $client.
4613: #
4614:
4615:
4616: sub update_clickers {
4617: my ($cmd, $tail, $client) = @_;
4618:
4619: my $userinput = "$cmd:$tail";
4620: my ($udom,$action,$what) =split(/:/,$tail,3);
4621: chomp($what);
4622:
4623: my $hashref = &tie_domain_hash($udom, "clickers", &GDBM_WRCREAT(),
4624: "U","$action:$what");
4625:
4626: if (!$hashref) {
4627: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4628: "while attempting updateclickers\n", $userinput);
4629: return 1;
4630: }
4631:
4632: my @pairs=split(/\&/,$what);
4633: foreach my $pair (@pairs) {
4634: my ($key,$value)=split(/=/,$pair);
4635: if ($action eq 'add') {
4636: if (exists($hashref->{$key})) {
4637: my @newvals = split(/,/,&unescape($value));
4638: my @currvals = split(/,/,&unescape($hashref->{$key}));
4639: my @merged = sort(keys(%{{map { $_ => 1 } (@newvals,@currvals)}}));
4640: $hashref->{$key}=&escape(join(',',@merged));
4641: } else {
4642: $hashref->{$key}=$value;
4643: }
4644: } elsif ($action eq 'del') {
4645: if (exists($hashref->{$key})) {
4646: my %current;
4647: map { $current{$_} = 1; } split(/,/,&unescape($hashref->{$key}));
4648: map { delete($current{$_}); } split(/,/,&unescape($value));
4649: if (keys(%current)) {
4650: $hashref->{$key}=&escape(join(',',sort(keys(%current))));
4651: } else {
4652: delete($hashref->{$key});
4653: }
4654: }
4655: }
4656: }
4657: if (&untie_user_hash($hashref)) {
4658: &Reply( $client, "ok\n", $userinput);
4659: } else {
4660: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
4661: "while attempting put\n",
4662: $userinput);
4663: }
4664: return 1;
4665: }
4666: ®ister_handler("updateclickers", \&update_clickers, 0, 1, 0);
4667:
4668:
4669: # Deletes one or more entries in a namespace db file at the domain level
4670: #
4671: # Parameters:
4672: # $cmd - The command that got us here.
4673: # $tail - Tail of the command (remaining parameters).
4674: # In this case a colon separated list containing:
4675: # (a) the domain for which we are deleting the entries,
4676: # (b) &-separated list of keys to delete.
4677: # $client - File descriptor connected to client.
4678: # Returns
4679: # 1 - Continue processing.
4680: # 0 - Requested to exit, caller should shut down.
4681: # Side effects:
4682: # reply is written to $client.
4683: #
4684:
4685: sub del_domain_handler {
4686: my ($cmd,$tail,$client) = @_;
4687:
4688: my $userinput = "$cmd:$tail";
4689:
4690: my ($udom,$namespace,$what)=split(/:/,$tail,3);
4691: chomp($what);
4692: my $hashref = &tie_domain_hash($udom,$namespace,&GDBM_WRCREAT(),
4693: "D", $what);
4694: if ($hashref) {
4695: my @keys=split(/\&/,$what);
4696: foreach my $key (@keys) {
4697: delete($hashref->{$key});
4698: }
4699: if (&untie_user_hash($hashref)) {
4700: &Reply($client, "ok\n", $userinput);
4701: } else {
4702: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4703: "while attempting deldom\n", $userinput);
4704: }
4705: } else {
4706: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4707: "while attempting deldom\n", $userinput);
4708: }
4709: return 1;
4710: }
4711: ®ister_handler("deldom", \&del_domain_handler, 0, 1, 0);
4712:
4713:
4714: # Unencrypted get from the namespace database file at the domain level.
4715: # This function retrieves a keyed item from a specific named database in the
4716: # domain directory.
4717: #
4718: # Parameters:
4719: # $cmd - Command request keyword (get).
4720: # $tail - Tail of the command. This is a colon separated list
4721: # consisting of the domain and the 'namespace'
4722: # which selects the gdbm file to do the lookup in,
4723: # & separated list of keys to lookup. Note that
4724: # the values are returned as an & separated list too.
4725: # $client - File descriptor open on the client.
4726: # Returns:
4727: # 1 - Continue processing.
4728: # 0 - Exit.
4729: # Side effects:
4730: # reply is written to $client.
4731: #
4732:
4733: sub get_domain_handler {
4734: my ($cmd, $tail, $client) = @_;
4735:
4736:
4737: my $userinput = "$client:$tail";
4738:
4739: my ($udom,$namespace,$what)=split(/:/,$tail,3);
4740: chomp($what);
4741: my @queries=split(/\&/,$what);
4742: my $qresult='';
4743: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_READER());
4744: if ($hashref) {
4745: for (my $i=0;$i<=$#queries;$i++) {
4746: $qresult.="$hashref->{$queries[$i]}&";
4747: }
4748: if (&untie_domain_hash($hashref)) {
4749: $qresult=~s/\&$//;
4750: &Reply($client, \$qresult, $userinput);
4751: } else {
4752: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
4753: "while attempting getdom\n",$userinput);
4754: }
4755: } else {
4756: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4757: "while attempting getdom\n",$userinput);
4758: }
4759:
4760: return 1;
4761: }
4762: ®ister_handler("getdom", \&get_domain_handler, 0, 1, 0);
4763:
4764: #
4765: # Puts an id to a domains id database.
4766: #
4767: # Parameters:
4768: # $cmd - The command that triggered us.
4769: # $tail - Remainder of the request other than the command. This is a
4770: # colon separated list containing:
4771: # $domain - The domain for which we are writing the id.
4772: # $pairs - The id info to write... this is and & separated list
4773: # of keyword=value.
4774: # $client - Socket open on the client.
4775: # Returns:
4776: # 1 - Continue processing.
4777: # Side effects:
4778: # reply is written to $client.
4779: #
4780: sub put_id_handler {
4781: my ($cmd,$tail,$client) = @_;
4782:
4783:
4784: my $userinput = "$cmd:$tail";
4785:
4786: my ($udom,$what)=split(/:/,$tail);
4787: chomp($what);
4788: my @pairs=split(/\&/,$what);
4789: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
4790: "P", $what);
4791: if ($hashref) {
4792: foreach my $pair (@pairs) {
4793: my ($key,$value)=split(/=/,$pair);
4794: $hashref->{$key}=$value;
4795: }
4796: if (&untie_domain_hash($hashref)) {
4797: &Reply($client, "ok\n", $userinput);
4798: } else {
4799: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4800: "while attempting idput\n", $userinput);
4801: }
4802: } else {
4803: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4804: "while attempting idput\n", $userinput);
4805: }
4806:
4807: return 1;
4808: }
4809: ®ister_handler("idput", \&put_id_handler, 0, 1, 0);
4810:
4811: #
4812: # Retrieves a set of id values from the id database.
4813: # Returns an & separated list of results, one for each requested id to the
4814: # client.
4815: #
4816: # Parameters:
4817: # $cmd - Command keyword that caused us to be dispatched.
4818: # $tail - Tail of the command. Consists of a colon separated:
4819: # domain - the domain whose id table we dump
4820: # ids Consists of an & separated list of
4821: # id keywords whose values will be fetched.
4822: # nonexisting keywords will have an empty value.
4823: # $client - Socket open on the client.
4824: #
4825: # Returns:
4826: # 1 - indicating processing should continue.
4827: # Side effects:
4828: # An & separated list of results is written to $client.
4829: #
4830: sub get_id_handler {
4831: my ($cmd, $tail, $client) = @_;
4832:
4833:
4834: my $userinput = "$client:$tail";
4835:
4836: my ($udom,$what)=split(/:/,$tail);
4837: chomp($what);
4838: my @queries=split(/\&/,$what);
4839: my $qresult='';
4840: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_READER());
4841: if ($hashref) {
4842: for (my $i=0;$i<=$#queries;$i++) {
4843: $qresult.="$hashref->{$queries[$i]}&";
4844: }
4845: if (&untie_domain_hash($hashref)) {
4846: $qresult=~s/\&$//;
4847: &Reply($client, \$qresult, $userinput);
4848: } else {
4849: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
4850: "while attempting idget\n",$userinput);
4851: }
4852: } else {
4853: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4854: "while attempting idget\n",$userinput);
4855: }
4856:
4857: return 1;
4858: }
4859: ®ister_handler("idget", \&get_id_handler, 0, 1, 0);
4860:
4861: # Deletes one or more ids in a domain's id database.
4862: #
4863: # Parameters:
4864: # $cmd - Command keyword (iddel).
4865: # $tail - Command tail. In this case a colon
4866: # separated list containing:
4867: # The domain for which we are deleting the id(s).
4868: # &-separated list of id(s) to delete.
4869: # $client - File open on client socket.
4870: # Returns:
4871: # 1 - Continue processing
4872: # 0 - Exit server.
4873: #
4874: #
4875:
4876: sub del_id_handler {
4877: my ($cmd,$tail,$client) = @_;
4878:
4879: my $userinput = "$cmd:$tail";
4880:
4881: my ($udom,$what)=split(/:/,$tail);
4882: chomp($what);
4883: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
4884: "D", $what);
4885: if ($hashref) {
4886: my @keys=split(/\&/,$what);
4887: foreach my $key (@keys) {
4888: delete($hashref->{$key});
4889: }
4890: if (&untie_user_hash($hashref)) {
4891: &Reply($client, "ok\n", $userinput);
4892: } else {
4893: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4894: "while attempting iddel\n", $userinput);
4895: }
4896: } else {
4897: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4898: "while attempting iddel\n", $userinput);
4899: }
4900: return 1;
4901: }
4902: ®ister_handler("iddel", \&del_id_handler, 0, 1, 0);
4903:
4904: #
4905: # Puts broadcast e-mail sent by Domain Coordinator in nohist_dcmail database
4906: #
4907: # Parameters
4908: # $cmd - Command keyword that caused us to be dispatched.
4909: # $tail - Tail of the command. Consists of a colon separated:
4910: # domain - the domain whose dcmail we are recording
4911: # email Consists of key=value pair
4912: # where key is unique msgid
4913: # and value is message (in XML)
4914: # $client - Socket open on the client.
4915: #
4916: # Returns:
4917: # 1 - indicating processing should continue.
4918: # Side effects
4919: # reply is written to $client.
4920: #
4921: sub put_dcmail_handler {
4922: my ($cmd,$tail,$client) = @_;
4923: my $userinput = "$cmd:$tail";
4924:
4925:
4926: my ($udom,$what)=split(/:/,$tail);
4927: chomp($what);
4928: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
4929: if ($hashref) {
4930: my ($key,$value)=split(/=/,$what);
4931: $hashref->{$key}=$value;
4932: }
4933: if (&untie_domain_hash($hashref)) {
4934: &Reply($client, "ok\n", $userinput);
4935: } else {
4936: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4937: "while attempting dcmailput\n", $userinput);
4938: }
4939: return 1;
4940: }
4941: ®ister_handler("dcmailput", \&put_dcmail_handler, 0, 1, 0);
4942:
4943: #
4944: # Retrieves broadcast e-mail from nohist_dcmail database
4945: # Returns to client an & separated list of key=value pairs,
4946: # where key is msgid and value is message information.
4947: #
4948: # Parameters
4949: # $cmd - Command keyword that caused us to be dispatched.
4950: # $tail - Tail of the command. Consists of a colon separated:
4951: # domain - the domain whose dcmail table we dump
4952: # startfilter - beginning of time window
4953: # endfilter - end of time window
4954: # sendersfilter - & separated list of username:domain
4955: # for senders to search for.
4956: # $client - Socket open on the client.
4957: #
4958: # Returns:
4959: # 1 - indicating processing should continue.
4960: # Side effects
4961: # reply (& separated list of msgid=messageinfo pairs) is
4962: # written to $client.
4963: #
4964: sub dump_dcmail_handler {
4965: my ($cmd, $tail, $client) = @_;
4966:
4967: my $userinput = "$cmd:$tail";
4968: my ($udom,$startfilter,$endfilter,$sendersfilter) = split(/:/,$tail);
4969: chomp($sendersfilter);
4970: my @senders = ();
4971: if (defined($startfilter)) {
4972: $startfilter=&unescape($startfilter);
4973: } else {
4974: $startfilter='.';
4975: }
4976: if (defined($endfilter)) {
4977: $endfilter=&unescape($endfilter);
4978: } else {
4979: $endfilter='.';
4980: }
4981: if (defined($sendersfilter)) {
4982: $sendersfilter=&unescape($sendersfilter);
4983: @senders = map { &unescape($_) } split(/\&/,$sendersfilter);
4984: }
4985:
4986: my $qresult='';
4987: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
4988: if ($hashref) {
4989: while (my ($key,$value) = each(%$hashref)) {
4990: my $match = 1;
4991: my ($timestamp,$subj,$uname,$udom) =
4992: split(/:/,&unescape(&unescape($key)),5); # yes, twice really
4993: $subj = &unescape($subj);
4994: unless ($startfilter eq '.' || !defined($startfilter)) {
4995: if ($timestamp < $startfilter) {
4996: $match = 0;
4997: }
4998: }
4999: unless ($endfilter eq '.' || !defined($endfilter)) {
5000: if ($timestamp > $endfilter) {
5001: $match = 0;
5002: }
5003: }
5004: unless (@senders < 1) {
5005: unless (grep/^$uname:$udom$/,@senders) {
5006: $match = 0;
5007: }
5008: }
5009: if ($match == 1) {
5010: $qresult.=$key.'='.$value.'&';
5011: }
5012: }
5013: if (&untie_domain_hash($hashref)) {
5014: chop($qresult);
5015: &Reply($client, \$qresult, $userinput);
5016: } else {
5017: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
5018: "while attempting dcmaildump\n", $userinput);
5019: }
5020: } else {
5021: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
5022: "while attempting dcmaildump\n", $userinput);
5023: }
5024: return 1;
5025: }
5026:
5027: ®ister_handler("dcmaildump", \&dump_dcmail_handler, 0, 1, 0);
5028:
5029: #
5030: # Puts domain roles in nohist_domainroles database
5031: #
5032: # Parameters
5033: # $cmd - Command keyword that caused us to be dispatched.
5034: # $tail - Tail of the command. Consists of a colon separated:
5035: # domain - the domain whose roles we are recording
5036: # role - Consists of key=value pair
5037: # where key is unique role
5038: # and value is start/end date information
5039: # $client - Socket open on the client.
5040: #
5041: # Returns:
5042: # 1 - indicating processing should continue.
5043: # Side effects
5044: # reply is written to $client.
5045: #
5046:
5047: sub put_domainroles_handler {
5048: my ($cmd,$tail,$client) = @_;
5049:
5050: my $userinput = "$cmd:$tail";
5051: my ($udom,$what)=split(/:/,$tail);
5052: chomp($what);
5053: my @pairs=split(/\&/,$what);
5054: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
5055: if ($hashref) {
5056: foreach my $pair (@pairs) {
5057: my ($key,$value)=split(/=/,$pair);
5058: $hashref->{$key}=$value;
5059: }
5060: if (&untie_domain_hash($hashref)) {
5061: &Reply($client, "ok\n", $userinput);
5062: } else {
5063: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
5064: "while attempting domroleput\n", $userinput);
5065: }
5066: } else {
5067: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
5068: "while attempting domroleput\n", $userinput);
5069: }
5070:
5071: return 1;
5072: }
5073:
5074: ®ister_handler("domroleput", \&put_domainroles_handler, 0, 1, 0);
5075:
5076: #
5077: # Retrieves domain roles from nohist_domainroles database
5078: # Returns to client an & separated list of key=value pairs,
5079: # where key is role and value is start and end date information.
5080: #
5081: # Parameters
5082: # $cmd - Command keyword that caused us to be dispatched.
5083: # $tail - Tail of the command. Consists of a colon separated:
5084: # domain - the domain whose domain roles table we dump
5085: # $client - Socket open on the client.
5086: #
5087: # Returns:
5088: # 1 - indicating processing should continue.
5089: # Side effects
5090: # reply (& separated list of role=start/end info pairs) is
5091: # written to $client.
5092: #
5093: sub dump_domainroles_handler {
5094: my ($cmd, $tail, $client) = @_;
5095:
5096: my $userinput = "$cmd:$tail";
5097: my ($udom,$startfilter,$endfilter,$rolesfilter) = split(/:/,$tail);
5098: chomp($rolesfilter);
5099: my @roles = ();
5100: if (defined($startfilter)) {
5101: $startfilter=&unescape($startfilter);
5102: } else {
5103: $startfilter='.';
5104: }
5105: if (defined($endfilter)) {
5106: $endfilter=&unescape($endfilter);
5107: } else {
5108: $endfilter='.';
5109: }
5110: if (defined($rolesfilter)) {
5111: $rolesfilter=&unescape($rolesfilter);
5112: @roles = split(/\&/,$rolesfilter);
5113: }
5114:
5115: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
5116: if ($hashref) {
5117: my $qresult = '';
5118: while (my ($key,$value) = each(%$hashref)) {
5119: my $match = 1;
5120: my ($end,$start) = split(/:/,&unescape($value));
5121: my ($trole,$uname,$udom,$runame,$rudom,$rsec) = split(/:/,&unescape($key));
5122: unless (@roles < 1) {
5123: unless (grep/^\Q$trole\E$/,@roles) {
5124: $match = 0;
5125: next;
5126: }
5127: }
5128: unless ($startfilter eq '.' || !defined($startfilter)) {
5129: if ((defined($start)) && ($start >= $startfilter)) {
5130: $match = 0;
5131: next;
5132: }
5133: }
5134: unless ($endfilter eq '.' || !defined($endfilter)) {
5135: if ((defined($end)) && (($end > 0) && ($end <= $endfilter))) {
5136: $match = 0;
5137: next;
5138: }
5139: }
5140: if ($match == 1) {
5141: $qresult.=$key.'='.$value.'&';
5142: }
5143: }
5144: if (&untie_domain_hash($hashref)) {
5145: chop($qresult);
5146: &Reply($client, \$qresult, $userinput);
5147: } else {
5148: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
5149: "while attempting domrolesdump\n", $userinput);
5150: }
5151: } else {
5152: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
5153: "while attempting domrolesdump\n", $userinput);
5154: }
5155: return 1;
5156: }
5157:
5158: ®ister_handler("domrolesdump", \&dump_domainroles_handler, 0, 1, 0);
5159:
5160:
5161: # Process the tmpput command I'm not sure what this does.. Seems to
5162: # create a file in the lonDaemons/tmp directory of the form $id.tmp
5163: # where Id is the client's ip concatenated with a sequence number.
5164: # The file will contain some value that is passed in. Is this e.g.
5165: # a login token?
5166: #
5167: # Parameters:
5168: # $cmd - The command that got us dispatched.
5169: # $tail - The remainder of the request following $cmd:
5170: # In this case this will be the contents of the file.
5171: # $client - Socket connected to the client.
5172: # Returns:
5173: # 1 indicating processing can continue.
5174: # Side effects:
5175: # A file is created in the local filesystem.
5176: # A reply is sent to the client.
5177: sub tmp_put_handler {
5178: my ($cmd, $what, $client) = @_;
5179:
5180: my $userinput = "$cmd:$what"; # Reconstruct for logging.
5181:
5182: my ($record,$context) = split(/:/,$what);
5183: if ($context ne '') {
5184: chomp($context);
5185: $context = &unescape($context);
5186: }
5187: my ($id,$store);
5188: $tmpsnum++;
5189: if (($context eq 'resetpw') || ($context eq 'createaccount')) {
5190: $id = &md5_hex(&md5_hex(time.{}.rand().$$));
5191: } else {
5192: $id = $$.'_'.$clientip.'_'.$tmpsnum;
5193: }
5194: $id=~s/\W/\_/g;
5195: $record=~s/\n//g;
5196: my $execdir=$perlvar{'lonDaemons'};
5197: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
5198: print $store $record;
5199: close $store;
5200: &Reply($client, \$id, $userinput);
5201: } else {
5202: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
5203: "while attempting tmpput\n", $userinput);
5204: }
5205: return 1;
5206:
5207: }
5208: ®ister_handler("tmpput", \&tmp_put_handler, 0, 1, 0);
5209:
5210: # Processes the tmpget command. This command returns the contents
5211: # of a temporary resource file(?) created via tmpput.
5212: #
5213: # Paramters:
5214: # $cmd - Command that got us dispatched.
5215: # $id - Tail of the command, contain the id of the resource
5216: # we want to fetch.
5217: # $client - socket open on the client.
5218: # Return:
5219: # 1 - Inidcating processing can continue.
5220: # Side effects:
5221: # A reply is sent to the client.
5222: #
5223: sub tmp_get_handler {
5224: my ($cmd, $id, $client) = @_;
5225:
5226: my $userinput = "$cmd:$id";
5227:
5228:
5229: $id=~s/\W/\_/g;
5230: my $store;
5231: my $execdir=$perlvar{'lonDaemons'};
5232: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
5233: my $reply=<$store>;
5234: &Reply( $client, \$reply, $userinput);
5235: close $store;
5236: } else {
5237: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
5238: "while attempting tmpget\n", $userinput);
5239: }
5240:
5241: return 1;
5242: }
5243: ®ister_handler("tmpget", \&tmp_get_handler, 0, 1, 0);
5244:
5245: #
5246: # Process the tmpdel command. This command deletes a temp resource
5247: # created by the tmpput command.
5248: #
5249: # Parameters:
5250: # $cmd - Command that got us here.
5251: # $id - Id of the temporary resource created.
5252: # $client - socket open on the client process.
5253: #
5254: # Returns:
5255: # 1 - Indicating processing should continue.
5256: # Side Effects:
5257: # A file is deleted
5258: # A reply is sent to the client.
5259: sub tmp_del_handler {
5260: my ($cmd, $id, $client) = @_;
5261:
5262: my $userinput= "$cmd:$id";
5263:
5264: chomp($id);
5265: $id=~s/\W/\_/g;
5266: my $execdir=$perlvar{'lonDaemons'};
5267: if (unlink("$execdir/tmp/$id.tmp")) {
5268: &Reply($client, "ok\n", $userinput);
5269: } else {
5270: &Failure( $client, "error: ".($!+0)."Unlink tmp Failed ".
5271: "while attempting tmpdel\n", $userinput);
5272: }
5273:
5274: return 1;
5275:
5276: }
5277: ®ister_handler("tmpdel", \&tmp_del_handler, 0, 1, 0);
5278:
5279: #
5280: # Processes the setannounce command. This command
5281: # creates a file named announce.txt in the top directory of
5282: # the documentn root and sets its contents. The announce.txt file is
5283: # printed in its entirety at the LonCAPA login page. Note:
5284: # once the announcement.txt fileis created it cannot be deleted.
5285: # However, setting the contents of the file to empty removes the
5286: # announcement from the login page of loncapa so who cares.
5287: #
5288: # Parameters:
5289: # $cmd - The command that got us dispatched.
5290: # $announcement - The text of the announcement.
5291: # $client - Socket open on the client process.
5292: # Retunrns:
5293: # 1 - Indicating request processing should continue
5294: # Side Effects:
5295: # The file {DocRoot}/announcement.txt is created.
5296: # A reply is sent to $client.
5297: #
5298: sub set_announce_handler {
5299: my ($cmd, $announcement, $client) = @_;
5300:
5301: my $userinput = "$cmd:$announcement";
5302:
5303: chomp($announcement);
5304: $announcement=&unescape($announcement);
5305: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
5306: '/announcement.txt')) {
5307: print $store $announcement;
5308: close $store;
5309: &Reply($client, "ok\n", $userinput);
5310: } else {
5311: &Failure($client, "error: ".($!+0)."\n", $userinput);
5312: }
5313:
5314: return 1;
5315: }
5316: ®ister_handler("setannounce", \&set_announce_handler, 0, 1, 0);
5317:
5318: #
5319: # Return the version of the daemon. This can be used to determine
5320: # the compatibility of cross version installations or, alternatively to
5321: # simply know who's out of date and who isn't. Note that the version
5322: # is returned concatenated with the tail.
5323: # Parameters:
5324: # $cmd - the request that dispatched to us.
5325: # $tail - Tail of the request (client's version?).
5326: # $client - Socket open on the client.
5327: #Returns:
5328: # 1 - continue processing requests.
5329: # Side Effects:
5330: # Replies with version to $client.
5331: sub get_version_handler {
5332: my ($cmd, $tail, $client) = @_;
5333:
5334: my $userinput = $cmd.$tail;
5335:
5336: &Reply($client, &version($userinput)."\n", $userinput);
5337:
5338:
5339: return 1;
5340: }
5341: ®ister_handler("version", \&get_version_handler, 0, 1, 0);
5342:
5343: # Set the current host and domain. This is used to support
5344: # multihomed systems. Each IP of the system, or even separate daemons
5345: # on the same IP can be treated as handling a separate lonCAPA virtual
5346: # machine. This command selects the virtual lonCAPA. The client always
5347: # knows the right one since it is lonc and it is selecting the domain/system
5348: # from the hosts.tab file.
5349: # Parameters:
5350: # $cmd - Command that dispatched us.
5351: # $tail - Tail of the command (domain/host requested).
5352: # $socket - Socket open on the client.
5353: #
5354: # Returns:
5355: # 1 - Indicates the program should continue to process requests.
5356: # Side-effects:
5357: # The default domain/system context is modified for this daemon.
5358: # a reply is sent to the client.
5359: #
5360: sub set_virtual_host_handler {
5361: my ($cmd, $tail, $socket) = @_;
5362:
5363: my $userinput ="$cmd:$tail";
5364:
5365: &Reply($client, &sethost($userinput)."\n", $userinput);
5366:
5367:
5368: return 1;
5369: }
5370: ®ister_handler("sethost", \&set_virtual_host_handler, 0, 1, 0);
5371:
5372: # Process a request to exit:
5373: # - "bye" is sent to the client.
5374: # - The client socket is shutdown and closed.
5375: # - We indicate to the caller that we should exit.
5376: # Formal Parameters:
5377: # $cmd - The command that got us here.
5378: # $tail - Tail of the command (empty).
5379: # $client - Socket open on the tail.
5380: # Returns:
5381: # 0 - Indicating the program should exit!!
5382: #
5383: sub exit_handler {
5384: my ($cmd, $tail, $client) = @_;
5385:
5386: my $userinput = "$cmd:$tail";
5387:
5388: &logthis("Client $clientip ($clientname) hanging up: $userinput");
5389: &Reply($client, "bye\n", $userinput);
5390: $client->shutdown(2); # shutdown the socket forcibly.
5391: $client->close();
5392:
5393: return 0;
5394: }
5395: ®ister_handler("exit", \&exit_handler, 0,1,1);
5396: ®ister_handler("init", \&exit_handler, 0,1,1);
5397: ®ister_handler("quit", \&exit_handler, 0,1,1);
5398:
5399: # Determine if auto-enrollment is enabled.
5400: # Note that the original had what I believe to be a defect.
5401: # The original returned 0 if the requestor was not a registerd client.
5402: # It should return "refused".
5403: # Formal Parameters:
5404: # $cmd - The command that invoked us.
5405: # $tail - The tail of the command (Extra command parameters.
5406: # $client - The socket open on the client that issued the request.
5407: # Returns:
5408: # 1 - Indicating processing should continue.
5409: #
5410: sub enrollment_enabled_handler {
5411: my ($cmd, $tail, $client) = @_;
5412: my $userinput = $cmd.":".$tail; # For logging purposes.
5413:
5414:
5415: my ($cdom) = split(/:/, $tail, 2); # Domain we're asking about.
5416:
5417: my $outcome = &localenroll::run($cdom);
5418: &Reply($client, \$outcome, $userinput);
5419:
5420: return 1;
5421: }
5422: ®ister_handler("autorun", \&enrollment_enabled_handler, 0, 1, 0);
5423:
5424: #
5425: # Validate an institutional code used for a LON-CAPA course.
5426: #
5427: # Formal Parameters:
5428: # $cmd - The command request that got us dispatched.
5429: # $tail - The tail of the command. In this case,
5430: # this is a colon separated set of words that will be split
5431: # into:
5432: # $dom - The domain for which the check of
5433: # institutional course code will occur.
5434: #
5435: # $instcode - The institutional code for the course
5436: # being requested, or validated for rights
5437: # to request.
5438: #
5439: # $owner - The course requestor (who will be the
5440: # course owner, in the form username:domain
5441: #
5442: # $client - Socket open on the client.
5443: # Returns:
5444: # 1 - Indicating processing should continue.
5445: #
5446: sub validate_instcode_handler {
5447: my ($cmd, $tail, $client) = @_;
5448: my $userinput = "$cmd:$tail";
5449: my ($dom,$instcode,$owner) = split(/:/, $tail);
5450: $instcode = &unescape($instcode);
5451: $owner = &unescape($owner);
5452: my ($outcome,$description,$credits) =
5453: &localenroll::validate_instcode($dom,$instcode,$owner);
5454: my $result = &escape($outcome).'&'.&escape($description).'&'.
5455: &escape($credits);
5456: &Reply($client, \$result, $userinput);
5457:
5458: return 1;
5459: }
5460: ®ister_handler("autovalidateinstcode", \&validate_instcode_handler, 0, 1, 0);
5461:
5462: # Get the official sections for which auto-enrollment is possible.
5463: # Since the admin people won't know about 'unofficial sections'
5464: # we cannot auto-enroll on them.
5465: # Formal Parameters:
5466: # $cmd - The command request that got us dispatched here.
5467: # $tail - The remainder of the request. In our case this
5468: # will be split into:
5469: # $coursecode - The course name from the admin point of view.
5470: # $cdom - The course's domain(?).
5471: # $client - Socket open on the client.
5472: # Returns:
5473: # 1 - Indiciting processing should continue.
5474: #
5475: sub get_sections_handler {
5476: my ($cmd, $tail, $client) = @_;
5477: my $userinput = "$cmd:$tail";
5478:
5479: my ($coursecode, $cdom) = split(/:/, $tail);
5480: my @secs = &localenroll::get_sections($coursecode,$cdom);
5481: my $seclist = &escape(join(':',@secs));
5482:
5483: &Reply($client, \$seclist, $userinput);
5484:
5485:
5486: return 1;
5487: }
5488: ®ister_handler("autogetsections", \&get_sections_handler, 0, 1, 0);
5489:
5490: # Validate the owner of a new course section.
5491: #
5492: # Formal Parameters:
5493: # $cmd - Command that got us dispatched.
5494: # $tail - the remainder of the command. For us this consists of a
5495: # colon separated string containing:
5496: # $inst - Course Id from the institutions point of view.
5497: # $owner - Proposed owner of the course.
5498: # $cdom - Domain of the course (from the institutions
5499: # point of view?)..
5500: # $client - Socket open on the client.
5501: #
5502: # Returns:
5503: # 1 - Processing should continue.
5504: #
5505: sub validate_course_owner_handler {
5506: my ($cmd, $tail, $client) = @_;
5507: my $userinput = "$cmd:$tail";
5508: my ($inst_course_id, $owner, $cdom, $coowners) = split(/:/, $tail);
5509:
5510: $owner = &unescape($owner);
5511: $coowners = &unescape($coowners);
5512: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom,$coowners);
5513: &Reply($client, \$outcome, $userinput);
5514:
5515:
5516:
5517: return 1;
5518: }
5519: ®ister_handler("autonewcourse", \&validate_course_owner_handler, 0, 1, 0);
5520:
5521: #
5522: # Validate a course section in the official schedule of classes
5523: # from the institutions point of view (part of autoenrollment).
5524: #
5525: # Formal Parameters:
5526: # $cmd - The command request that got us dispatched.
5527: # $tail - The tail of the command. In this case,
5528: # this is a colon separated set of words that will be split
5529: # into:
5530: # $inst_course_id - The course/section id from the
5531: # institutions point of view.
5532: # $cdom - The domain from the institutions
5533: # point of view.
5534: # $client - Socket open on the client.
5535: # Returns:
5536: # 1 - Indicating processing should continue.
5537: #
5538: sub validate_course_section_handler {
5539: my ($cmd, $tail, $client) = @_;
5540: my $userinput = "$cmd:$tail";
5541: my ($inst_course_id, $cdom) = split(/:/, $tail);
5542:
5543: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
5544: &Reply($client, \$outcome, $userinput);
5545:
5546:
5547: return 1;
5548: }
5549: ®ister_handler("autovalidatecourse", \&validate_course_section_handler, 0, 1, 0);
5550:
5551: #
5552: # Validate course owner's access to enrollment data for specific class section.
5553: #
5554: #
5555: # Formal Parameters:
5556: # $cmd - The command request that got us dispatched.
5557: # $tail - The tail of the command. In this case this is a colon separated
5558: # set of words that will be split into:
5559: # $inst_class - Institutional code for the specific class section
5560: # $courseowner - The escaped username:domain of the course owner
5561: # $cdom - The domain of the course from the institution's
5562: # point of view.
5563: # $client - The socket open on the client.
5564: # Returns:
5565: # 1 - continue processing.
5566: #
5567:
5568: sub validate_class_access_handler {
5569: my ($cmd, $tail, $client) = @_;
5570: my $userinput = "$cmd:$tail";
5571: my ($inst_class,$ownerlist,$cdom) = split(/:/, $tail);
5572: my $owners = &unescape($ownerlist);
5573: my $outcome;
5574: eval {
5575: local($SIG{__DIE__})='DEFAULT';
5576: $outcome=&localenroll::check_section($inst_class,$owners,$cdom);
5577: };
5578: &Reply($client,\$outcome, $userinput);
5579:
5580: return 1;
5581: }
5582: ®ister_handler("autovalidateclass_sec", \&validate_class_access_handler, 0, 1, 0);
5583:
5584: #
5585: # Create a password for a new LON-CAPA user added by auto-enrollment.
5586: # Only used for case where authentication method for new user is localauth
5587: #
5588: # Formal Parameters:
5589: # $cmd - The command request that got us dispatched.
5590: # $tail - The tail of the command. In this case this is a colon separated
5591: # set of words that will be split into:
5592: # $authparam - An authentication parameter (localauth parameter).
5593: # $cdom - The domain of the course from the institution's
5594: # point of view.
5595: # $client - The socket open on the client.
5596: # Returns:
5597: # 1 - continue processing.
5598: #
5599: sub create_auto_enroll_password_handler {
5600: my ($cmd, $tail, $client) = @_;
5601: my $userinput = "$cmd:$tail";
5602:
5603: my ($authparam, $cdom) = split(/:/, $userinput);
5604:
5605: my ($create_passwd,$authchk);
5606: ($authparam,
5607: $create_passwd,
5608: $authchk) = &localenroll::create_password($authparam,$cdom);
5609:
5610: &Reply($client, &escape($authparam.':'.$create_passwd.':'.$authchk)."\n",
5611: $userinput);
5612:
5613:
5614: return 1;
5615: }
5616: ®ister_handler("autocreatepassword", \&create_auto_enroll_password_handler,
5617: 0, 1, 0);
5618:
5619: sub auto_export_grades_handler {
5620: my ($cmd, $tail, $client) = @_;
5621: my $userinput = "$cmd:$tail";
5622: my ($cdom,$cnum,$info,$data) = split(/:/,$tail);
5623: my $inforef = &Apache::lonnet::thaw_unescape($info);
5624: my $dataref = &Apache::lonnet::thaw_unescape($data);
5625: my ($outcome,$result);;
5626: eval {
5627: local($SIG{__DIE__})='DEFAULT';
5628: my %rtnhash;
5629: $outcome=&localenroll::export_grades($cdom,$cnum,$inforef,$dataref,\%rtnhash);
5630: if ($outcome eq 'ok') {
5631: foreach my $key (keys(%rtnhash)) {
5632: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rtnhash{$key}).'&';
5633: }
5634: $result =~ s/\&$//;
5635: }
5636: };
5637: if (!$@) {
5638: if ($outcome eq 'ok') {
5639: if ($cipher) {
5640: my $cmdlength=length($result);
5641: $result.=" ";
5642: my $encresult='';
5643: for (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
5644: $encresult.= unpack("H16",
5645: $cipher->encrypt(substr($result,
5646: $encidx,
5647: 8)));
5648: }
5649: &Reply( $client, "enc:$cmdlength:$encresult\n", $userinput);
5650: } else {
5651: &Failure( $client, "error:no_key\n", $userinput);
5652: }
5653: } else {
5654: &Reply($client, "$outcome\n", $userinput);
5655: }
5656: } else {
5657: &Failure($client,"export_error\n",$userinput);
5658: }
5659: return 1;
5660: }
5661: ®ister_handler("autoexportgrades", \&auto_export_grades_handler,
5662: 0, 1, 0);
5663:
5664: # Retrieve and remove temporary files created by/during autoenrollment.
5665: #
5666: # Formal Parameters:
5667: # $cmd - The command that got us dispatched.
5668: # $tail - The tail of the command. In our case this is a colon
5669: # separated list that will be split into:
5670: # $filename - The name of the file to remove.
5671: # The filename is given as a path relative to
5672: # the LonCAPA temp file directory.
5673: # $client - Socket open on the client.
5674: #
5675: # Returns:
5676: # 1 - Continue processing.
5677: sub retrieve_auto_file_handler {
5678: my ($cmd, $tail, $client) = @_;
5679: my $userinput = "cmd:$tail";
5680:
5681: my ($filename) = split(/:/, $tail);
5682:
5683: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
5684:
5685: if ($filename =~m{/\.\./}) {
5686: &Failure($client, "refused\n", $userinput);
5687: } elsif ( (-e $source) && ($filename ne '') ) {
5688: my $reply = '';
5689: if (open(my $fh,$source)) {
5690: while (<$fh>) {
5691: chomp($_);
5692: $_ =~ s/^\s+//g;
5693: $_ =~ s/\s+$//g;
5694: $reply .= $_;
5695: }
5696: close($fh);
5697: &Reply($client, &escape($reply)."\n", $userinput);
5698:
5699: # Does this have to be uncommented??!? (RF).
5700: #
5701: # unlink($source);
5702: } else {
5703: &Failure($client, "error\n", $userinput);
5704: }
5705: } else {
5706: &Failure($client, "error\n", $userinput);
5707: }
5708:
5709:
5710: return 1;
5711: }
5712: ®ister_handler("autoretrieve", \&retrieve_auto_file_handler, 0,1,0);
5713:
5714: sub crsreq_checks_handler {
5715: my ($cmd, $tail, $client) = @_;
5716: my $userinput = "$cmd:$tail";
5717: my $dom = $tail;
5718: my $result;
5719: my @reqtypes = ('official','unofficial','community','textbook','placement');
5720: eval {
5721: local($SIG{__DIE__})='DEFAULT';
5722: my %validations;
5723: my $response = &localenroll::crsreq_checks($dom,\@reqtypes,
5724: \%validations);
5725: if ($response eq 'ok') {
5726: foreach my $key (keys(%validations)) {
5727: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($validations{$key}).'&';
5728: }
5729: $result =~ s/\&$//;
5730: } else {
5731: $result = 'error';
5732: }
5733: };
5734: if (!$@) {
5735: &Reply($client, \$result, $userinput);
5736: } else {
5737: &Failure($client,"unknown_cmd\n",$userinput);
5738: }
5739: return 1;
5740: }
5741: ®ister_handler("autocrsreqchecks", \&crsreq_checks_handler, 0, 1, 0);
5742:
5743: sub validate_crsreq_handler {
5744: my ($cmd, $tail, $client) = @_;
5745: my $userinput = "$cmd:$tail";
5746: my ($dom,$owner,$crstype,$inststatuslist,$instcode,$instseclist,$customdata) = split(/:/, $tail);
5747: $instcode = &unescape($instcode);
5748: $owner = &unescape($owner);
5749: $crstype = &unescape($crstype);
5750: $inststatuslist = &unescape($inststatuslist);
5751: $instcode = &unescape($instcode);
5752: $instseclist = &unescape($instseclist);
5753: my $custominfo = &Apache::lonnet::thaw_unescape($customdata);
5754: my $outcome;
5755: eval {
5756: local($SIG{__DIE__})='DEFAULT';
5757: $outcome = &localenroll::validate_crsreq($dom,$owner,$crstype,
5758: $inststatuslist,$instcode,
5759: $instseclist,$custominfo);
5760: };
5761: if (!$@) {
5762: &Reply($client, \$outcome, $userinput);
5763: } else {
5764: &Failure($client,"unknown_cmd\n",$userinput);
5765: }
5766: return 1;
5767: }
5768: ®ister_handler("autocrsreqvalidation", \&validate_crsreq_handler, 0, 1, 0);
5769:
5770: sub crsreq_update_handler {
5771: my ($cmd, $tail, $client) = @_;
5772: my $userinput = "$cmd:$tail";
5773: my ($cdom,$cnum,$crstype,$action,$ownername,$ownerdomain,$fullname,$title,$code,
5774: $accessstart,$accessend,$infohashref) =
5775: split(/:/, $tail);
5776: $crstype = &unescape($crstype);
5777: $action = &unescape($action);
5778: $ownername = &unescape($ownername);
5779: $ownerdomain = &unescape($ownerdomain);
5780: $fullname = &unescape($fullname);
5781: $title = &unescape($title);
5782: $code = &unescape($code);
5783: $accessstart = &unescape($accessstart);
5784: $accessend = &unescape($accessend);
5785: my $incoming = &Apache::lonnet::thaw_unescape($infohashref);
5786: my ($result,$outcome);
5787: eval {
5788: local($SIG{__DIE__})='DEFAULT';
5789: my %rtnhash;
5790: $outcome = &localenroll::crsreq_updates($cdom,$cnum,$crstype,$action,
5791: $ownername,$ownerdomain,$fullname,
5792: $title,$code,$accessstart,$accessend,
5793: $incoming,\%rtnhash);
5794: if ($outcome eq 'ok') {
5795: my @posskeys = qw(createdweb createdmsg createdcustomized createdactions queuedweb queuedmsg formitems reviewweb validationjs onload javascript);
5796: foreach my $key (keys(%rtnhash)) {
5797: if (grep(/^\Q$key\E/,@posskeys)) {
5798: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rtnhash{$key}).'&';
5799: }
5800: }
5801: $result =~ s/\&$//;
5802: }
5803: };
5804: if (!$@) {
5805: if ($outcome eq 'ok') {
5806: &Reply($client, \$result, $userinput);
5807: } else {
5808: &Reply($client, "format_error\n", $userinput);
5809: }
5810: } else {
5811: &Failure($client,"unknown_cmd\n",$userinput);
5812: }
5813: return 1;
5814: }
5815: ®ister_handler("autocrsrequpdate", \&crsreq_update_handler, 0, 1, 0);
5816:
5817: #
5818: # Read and retrieve institutional code format (for support form).
5819: # Formal Parameters:
5820: # $cmd - Command that dispatched us.
5821: # $tail - Tail of the command. In this case it conatins
5822: # the course domain and the coursename.
5823: # $client - Socket open on the client.
5824: # Returns:
5825: # 1 - Continue processing.
5826: #
5827: sub get_institutional_code_format_handler {
5828: my ($cmd, $tail, $client) = @_;
5829: my $userinput = "$cmd:$tail";
5830:
5831: my $reply;
5832: my($cdom,$course) = split(/:/,$tail);
5833: my @pairs = split/\&/,$course;
5834: my %instcodes = ();
5835: my %codes = ();
5836: my @codetitles = ();
5837: my %cat_titles = ();
5838: my %cat_order = ();
5839: foreach (@pairs) {
5840: my ($key,$value) = split/=/,$_;
5841: $instcodes{&unescape($key)} = &unescape($value);
5842: }
5843: my $formatreply = &localenroll::instcode_format($cdom,
5844: \%instcodes,
5845: \%codes,
5846: \@codetitles,
5847: \%cat_titles,
5848: \%cat_order);
5849: if ($formatreply eq 'ok') {
5850: my $codes_str = &Apache::lonnet::hash2str(%codes);
5851: my $codetitles_str = &Apache::lonnet::array2str(@codetitles);
5852: my $cat_titles_str = &Apache::lonnet::hash2str(%cat_titles);
5853: my $cat_order_str = &Apache::lonnet::hash2str(%cat_order);
5854: &Reply($client,
5855: $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'
5856: .$cat_order_str."\n",
5857: $userinput);
5858: } else {
5859: # this else branch added by RF since if not ok, lonc will
5860: # hang waiting on reply until timeout.
5861: #
5862: &Reply($client, "format_error\n", $userinput);
5863: }
5864:
5865: return 1;
5866: }
5867: ®ister_handler("autoinstcodeformat",
5868: \&get_institutional_code_format_handler,0,1,0);
5869:
5870: sub get_institutional_defaults_handler {
5871: my ($cmd, $tail, $client) = @_;
5872: my $userinput = "$cmd:$tail";
5873:
5874: my $dom = $tail;
5875: my %defaults_hash;
5876: my @code_order;
5877: my $outcome;
5878: eval {
5879: local($SIG{__DIE__})='DEFAULT';
5880: $outcome = &localenroll::instcode_defaults($dom,\%defaults_hash,
5881: \@code_order);
5882: };
5883: if (!$@) {
5884: if ($outcome eq 'ok') {
5885: my $result='';
5886: while (my ($key,$value) = each(%defaults_hash)) {
5887: $result.=&escape($key).'='.&escape($value).'&';
5888: }
5889: $result .= 'code_order='.&escape(join('&',@code_order));
5890: &Reply($client,\$result,$userinput);
5891: } else {
5892: &Reply($client,"error\n", $userinput);
5893: }
5894: } else {
5895: &Failure($client,"unknown_cmd\n",$userinput);
5896: }
5897: }
5898: ®ister_handler("autoinstcodedefaults",
5899: \&get_institutional_defaults_handler,0,1,0);
5900:
5901: sub get_possible_instcodes_handler {
5902: my ($cmd, $tail, $client) = @_;
5903: my $userinput = "$cmd:$tail";
5904:
5905: my $reply;
5906: my $cdom = $tail;
5907: my (@codetitles,%cat_titles,%cat_order,@code_order);
5908: my $formatreply = &localenroll::possible_instcodes($cdom,
5909: \@codetitles,
5910: \%cat_titles,
5911: \%cat_order,
5912: \@code_order);
5913: if ($formatreply eq 'ok') {
5914: my $result = join('&',map {&escape($_);} (@codetitles)).':';
5915: $result .= join('&',map {&escape($_);} (@code_order)).':';
5916: foreach my $key (keys(%cat_titles)) {
5917: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($cat_titles{$key}).'&';
5918: }
5919: $result =~ s/\&$//;
5920: $result .= ':';
5921: foreach my $key (keys(%cat_order)) {
5922: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($cat_order{$key}).'&';
5923: }
5924: $result =~ s/\&$//;
5925: &Reply($client,\$result,$userinput);
5926: } else {
5927: &Reply($client, "format_error\n", $userinput);
5928: }
5929: return 1;
5930: }
5931: ®ister_handler("autopossibleinstcodes",
5932: \&get_possible_instcodes_handler,0,1,0);
5933:
5934: sub get_institutional_user_rules {
5935: my ($cmd, $tail, $client) = @_;
5936: my $userinput = "$cmd:$tail";
5937: my $dom = &unescape($tail);
5938: my (%rules_hash,@rules_order);
5939: my $outcome;
5940: eval {
5941: local($SIG{__DIE__})='DEFAULT';
5942: $outcome = &localenroll::username_rules($dom,\%rules_hash,\@rules_order);
5943: };
5944: if (!$@) {
5945: if ($outcome eq 'ok') {
5946: my $result;
5947: foreach my $key (keys(%rules_hash)) {
5948: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
5949: }
5950: $result =~ s/\&$//;
5951: $result .= ':';
5952: if (@rules_order > 0) {
5953: foreach my $item (@rules_order) {
5954: $result .= &escape($item).'&';
5955: }
5956: }
5957: $result =~ s/\&$//;
5958: &Reply($client,\$result,$userinput);
5959: } else {
5960: &Reply($client,"error\n", $userinput);
5961: }
5962: } else {
5963: &Failure($client,"unknown_cmd\n",$userinput);
5964: }
5965: }
5966: ®ister_handler("instuserrules",\&get_institutional_user_rules,0,1,0);
5967:
5968: sub get_institutional_id_rules {
5969: my ($cmd, $tail, $client) = @_;
5970: my $userinput = "$cmd:$tail";
5971: my $dom = &unescape($tail);
5972: my (%rules_hash,@rules_order);
5973: my $outcome;
5974: eval {
5975: local($SIG{__DIE__})='DEFAULT';
5976: $outcome = &localenroll::id_rules($dom,\%rules_hash,\@rules_order);
5977: };
5978: if (!$@) {
5979: if ($outcome eq 'ok') {
5980: my $result;
5981: foreach my $key (keys(%rules_hash)) {
5982: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
5983: }
5984: $result =~ s/\&$//;
5985: $result .= ':';
5986: if (@rules_order > 0) {
5987: foreach my $item (@rules_order) {
5988: $result .= &escape($item).'&';
5989: }
5990: }
5991: $result =~ s/\&$//;
5992: &Reply($client,\$result,$userinput);
5993: } else {
5994: &Reply($client,"error\n", $userinput);
5995: }
5996: } else {
5997: &Failure($client,"unknown_cmd\n",$userinput);
5998: }
5999: }
6000: ®ister_handler("instidrules",\&get_institutional_id_rules,0,1,0);
6001:
6002: sub get_institutional_selfcreate_rules {
6003: my ($cmd, $tail, $client) = @_;
6004: my $userinput = "$cmd:$tail";
6005: my $dom = &unescape($tail);
6006: my (%rules_hash,@rules_order);
6007: my $outcome;
6008: eval {
6009: local($SIG{__DIE__})='DEFAULT';
6010: $outcome = &localenroll::selfcreate_rules($dom,\%rules_hash,\@rules_order);
6011: };
6012: if (!$@) {
6013: if ($outcome eq 'ok') {
6014: my $result;
6015: foreach my $key (keys(%rules_hash)) {
6016: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
6017: }
6018: $result =~ s/\&$//;
6019: $result .= ':';
6020: if (@rules_order > 0) {
6021: foreach my $item (@rules_order) {
6022: $result .= &escape($item).'&';
6023: }
6024: }
6025: $result =~ s/\&$//;
6026: &Reply($client,\$result,$userinput);
6027: } else {
6028: &Reply($client,"error\n", $userinput);
6029: }
6030: } else {
6031: &Failure($client,"unknown_cmd\n",$userinput);
6032: }
6033: }
6034: ®ister_handler("instemailrules",\&get_institutional_selfcreate_rules,0,1,0);
6035:
6036:
6037: sub institutional_username_check {
6038: my ($cmd, $tail, $client) = @_;
6039: my $userinput = "$cmd:$tail";
6040: my %rulecheck;
6041: my $outcome;
6042: my ($udom,$uname,@rules) = split(/:/,$tail);
6043: $udom = &unescape($udom);
6044: $uname = &unescape($uname);
6045: @rules = map {&unescape($_);} (@rules);
6046: eval {
6047: local($SIG{__DIE__})='DEFAULT';
6048: $outcome = &localenroll::username_check($udom,$uname,\@rules,\%rulecheck);
6049: };
6050: if (!$@) {
6051: if ($outcome eq 'ok') {
6052: my $result='';
6053: foreach my $key (keys(%rulecheck)) {
6054: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
6055: }
6056: &Reply($client,\$result,$userinput);
6057: } else {
6058: &Reply($client,"error\n", $userinput);
6059: }
6060: } else {
6061: &Failure($client,"unknown_cmd\n",$userinput);
6062: }
6063: }
6064: ®ister_handler("instrulecheck",\&institutional_username_check,0,1,0);
6065:
6066: sub institutional_id_check {
6067: my ($cmd, $tail, $client) = @_;
6068: my $userinput = "$cmd:$tail";
6069: my %rulecheck;
6070: my $outcome;
6071: my ($udom,$id,@rules) = split(/:/,$tail);
6072: $udom = &unescape($udom);
6073: $id = &unescape($id);
6074: @rules = map {&unescape($_);} (@rules);
6075: eval {
6076: local($SIG{__DIE__})='DEFAULT';
6077: $outcome = &localenroll::id_check($udom,$id,\@rules,\%rulecheck);
6078: };
6079: if (!$@) {
6080: if ($outcome eq 'ok') {
6081: my $result='';
6082: foreach my $key (keys(%rulecheck)) {
6083: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
6084: }
6085: &Reply($client,\$result,$userinput);
6086: } else {
6087: &Reply($client,"error\n", $userinput);
6088: }
6089: } else {
6090: &Failure($client,"unknown_cmd\n",$userinput);
6091: }
6092: }
6093: ®ister_handler("instidrulecheck",\&institutional_id_check,0,1,0);
6094:
6095: sub institutional_selfcreate_check {
6096: my ($cmd, $tail, $client) = @_;
6097: my $userinput = "$cmd:$tail";
6098: my %rulecheck;
6099: my $outcome;
6100: my ($udom,$email,@rules) = split(/:/,$tail);
6101: $udom = &unescape($udom);
6102: $email = &unescape($email);
6103: @rules = map {&unescape($_);} (@rules);
6104: eval {
6105: local($SIG{__DIE__})='DEFAULT';
6106: $outcome = &localenroll::selfcreate_check($udom,$email,\@rules,\%rulecheck);
6107: };
6108: if (!$@) {
6109: if ($outcome eq 'ok') {
6110: my $result='';
6111: foreach my $key (keys(%rulecheck)) {
6112: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
6113: }
6114: &Reply($client,\$result,$userinput);
6115: } else {
6116: &Reply($client,"error\n", $userinput);
6117: }
6118: } else {
6119: &Failure($client,"unknown_cmd\n",$userinput);
6120: }
6121: }
6122: ®ister_handler("instselfcreatecheck",\&institutional_selfcreate_check,0,1,0);
6123:
6124: # Get domain specific conditions for import of student photographs to a course
6125: #
6126: # Retrieves information from photo_permission subroutine in localenroll.
6127: # Returns outcome (ok) if no processing errors, and whether course owner is
6128: # required to accept conditions of use (yes/no).
6129: #
6130: #
6131: sub photo_permission_handler {
6132: my ($cmd, $tail, $client) = @_;
6133: my $userinput = "$cmd:$tail";
6134: my $cdom = $tail;
6135: my ($perm_reqd,$conditions);
6136: my $outcome;
6137: eval {
6138: local($SIG{__DIE__})='DEFAULT';
6139: $outcome = &localenroll::photo_permission($cdom,\$perm_reqd,
6140: \$conditions);
6141: };
6142: if (!$@) {
6143: &Reply($client, &escape($outcome.':'.$perm_reqd.':'. $conditions)."\n",
6144: $userinput);
6145: } else {
6146: &Failure($client,"unknown_cmd\n",$userinput);
6147: }
6148: return 1;
6149: }
6150: ®ister_handler("autophotopermission",\&photo_permission_handler,0,1,0);
6151:
6152: #
6153: # Checks if student photo is available for a user in the domain, in the user's
6154: # directory (in /userfiles/internal/studentphoto.jpg).
6155: # Uses localstudentphoto:fetch() to ensure there is an up to date copy of
6156: # the student's photo.
6157:
6158: sub photo_check_handler {
6159: my ($cmd, $tail, $client) = @_;
6160: my $userinput = "$cmd:$tail";
6161: my ($udom,$uname,$pid) = split(/:/,$tail);
6162: $udom = &unescape($udom);
6163: $uname = &unescape($uname);
6164: $pid = &unescape($pid);
6165: my $path=&propath($udom,$uname).'/userfiles/internal/';
6166: if (!-e $path) {
6167: &mkpath($path);
6168: }
6169: my $response;
6170: my $result = &localstudentphoto::fetch($udom,$uname,$pid,\$response);
6171: $result .= ':'.$response;
6172: &Reply($client, &escape($result)."\n",$userinput);
6173: return 1;
6174: }
6175: ®ister_handler("autophotocheck",\&photo_check_handler,0,1,0);
6176:
6177: #
6178: # Retrieve information from localenroll about whether to provide a button
6179: # for users who have enbled import of student photos to initiate an
6180: # update of photo files for registered students. Also include
6181: # comment to display alongside button.
6182:
6183: sub photo_choice_handler {
6184: my ($cmd, $tail, $client) = @_;
6185: my $userinput = "$cmd:$tail";
6186: my $cdom = &unescape($tail);
6187: my ($update,$comment);
6188: eval {
6189: local($SIG{__DIE__})='DEFAULT';
6190: ($update,$comment) = &localenroll::manager_photo_update($cdom);
6191: };
6192: if (!$@) {
6193: &Reply($client,&escape($update).':'.&escape($comment)."\n",$userinput);
6194: } else {
6195: &Failure($client,"unknown_cmd\n",$userinput);
6196: }
6197: return 1;
6198: }
6199: ®ister_handler("autophotochoice",\&photo_choice_handler,0,1,0);
6200:
6201: #
6202: # Gets a student's photo to exist (in the correct image type) in the user's
6203: # directory.
6204: # Formal Parameters:
6205: # $cmd - The command request that got us dispatched.
6206: # $tail - A colon separated set of words that will be split into:
6207: # $domain - student's domain
6208: # $uname - student username
6209: # $type - image type desired
6210: # $client - The socket open on the client.
6211: # Returns:
6212: # 1 - continue processing.
6213:
6214: sub student_photo_handler {
6215: my ($cmd, $tail, $client) = @_;
6216: my ($domain,$uname,$ext,$type) = split(/:/, $tail);
6217:
6218: my $path=&propath($domain,$uname). '/userfiles/internal/';
6219: my $filename = 'studentphoto.'.$ext;
6220: if ($type eq 'thumbnail') {
6221: $filename = 'studentphoto_tn.'.$ext;
6222: }
6223: if (-e $path.$filename) {
6224: &Reply($client,"ok\n","$cmd:$tail");
6225: return 1;
6226: }
6227: &mkpath($path);
6228: my $file;
6229: if ($type eq 'thumbnail') {
6230: eval {
6231: local($SIG{__DIE__})='DEFAULT';
6232: $file=&localstudentphoto::fetch_thumbnail($domain,$uname);
6233: };
6234: } else {
6235: $file=&localstudentphoto::fetch($domain,$uname);
6236: }
6237: if (!$file) {
6238: &Failure($client,"unavailable\n","$cmd:$tail");
6239: return 1;
6240: }
6241: if (!-e $path.$filename) { &convert_photo($file,$path.$filename); }
6242: if (-e $path.$filename) {
6243: &Reply($client,"ok\n","$cmd:$tail");
6244: return 1;
6245: }
6246: &Failure($client,"unable_to_convert\n","$cmd:$tail");
6247: return 1;
6248: }
6249: ®ister_handler("studentphoto", \&student_photo_handler, 0, 1, 0);
6250:
6251: sub inst_usertypes_handler {
6252: my ($cmd, $domain, $client) = @_;
6253: my $res;
6254: my $userinput = $cmd.":".$domain; # For logging purposes.
6255: my (%typeshash,@order,$result);
6256: eval {
6257: local($SIG{__DIE__})='DEFAULT';
6258: $result=&localenroll::inst_usertypes($domain,\%typeshash,\@order);
6259: };
6260: if ($result eq 'ok') {
6261: if (keys(%typeshash) > 0) {
6262: foreach my $key (keys(%typeshash)) {
6263: $res.=&escape($key).'='.&escape($typeshash{$key}).'&';
6264: }
6265: }
6266: $res=~s/\&$//;
6267: $res .= ':';
6268: if (@order > 0) {
6269: foreach my $item (@order) {
6270: $res .= &escape($item).'&';
6271: }
6272: }
6273: $res=~s/\&$//;
6274: }
6275: &Reply($client, \$res, $userinput);
6276: return 1;
6277: }
6278: ®ister_handler("inst_usertypes", \&inst_usertypes_handler, 0, 1, 0);
6279:
6280: # mkpath makes all directories for a file, expects an absolute path with a
6281: # file or a trailing / if just a dir is passed
6282: # returns 1 on success 0 on failure
6283: sub mkpath {
6284: my ($file)=@_;
6285: my @parts=split(/\//,$file,-1);
6286: my $now=$parts[0].'/'.$parts[1].'/'.$parts[2];
6287: for (my $i=3;$i<= ($#parts-1);$i++) {
6288: $now.='/'.$parts[$i];
6289: if (!-e $now) {
6290: if (!mkdir($now,0770)) { return 0; }
6291: }
6292: }
6293: return 1;
6294: }
6295:
6296: #---------------------------------------------------------------
6297: #
6298: # Getting, decoding and dispatching requests:
6299: #
6300: #
6301: # Get a Request:
6302: # Gets a Request message from the client. The transaction
6303: # is defined as a 'line' of text. We remove the new line
6304: # from the text line.
6305: #
6306: sub get_request {
6307: my $input = <$client>;
6308: chomp($input);
6309:
6310: &Debug("get_request: Request = $input\n");
6311:
6312: &status('Processing '.$clientname.':'.$input);
6313:
6314: return $input;
6315: }
6316: #---------------------------------------------------------------
6317: #
6318: # Process a request. This sub should shrink as each action
6319: # gets farmed out into a separat sub that is registered
6320: # with the dispatch hash.
6321: #
6322: # Parameters:
6323: # user_input - The request received from the client (lonc).
6324: #
6325: # Returns:
6326: # true to keep processing, false if caller should exit.
6327: #
6328: sub process_request {
6329: my ($userinput) = @_; # Easier for now to break style than to
6330: # fix all the userinput -> user_input.
6331: my $wasenc = 0; # True if request was encrypted.
6332: # ------------------------------------------------------------ See if encrypted
6333: # for command
6334: # sethost:<server>
6335: # <command>:<args>
6336: # we just send it to the processor
6337: # for
6338: # sethost:<server>:<command>:<args>
6339: # we do the implict set host and then do the command
6340: if ($userinput =~ /^sethost:/) {
6341: (my $cmd,my $newid,$userinput) = split(':',$userinput,3);
6342: if (defined($userinput)) {
6343: &sethost("$cmd:$newid");
6344: } else {
6345: $userinput = "$cmd:$newid";
6346: }
6347: }
6348:
6349: if ($userinput =~ /^enc/) {
6350: $userinput = decipher($userinput);
6351: $wasenc=1;
6352: if(!$userinput) { # Cipher not defined.
6353: &Failure($client, "error: Encrypted data without negotated key\n");
6354: return 0;
6355: }
6356: }
6357: Debug("process_request: $userinput\n");
6358:
6359: #
6360: # The 'correct way' to add a command to lond is now to
6361: # write a sub to execute it and Add it to the command dispatch
6362: # hash via a call to register_handler.. The comments to that
6363: # sub should give you enough to go on to show how to do this
6364: # along with the examples that are building up as this code
6365: # is getting refactored. Until all branches of the
6366: # if/elseif monster below have been factored out into
6367: # separate procesor subs, if the dispatch hash is missing
6368: # the command keyword, we will fall through to the remainder
6369: # of the if/else chain below in order to keep this thing in
6370: # working order throughout the transmogrification.
6371:
6372: my ($command, $tail) = split(/:/, $userinput, 2);
6373: chomp($command);
6374: chomp($tail);
6375: $tail =~ s/(\r)//; # This helps people debugging with e.g. telnet.
6376: $command =~ s/(\r)//; # And this too for parameterless commands.
6377: if(!$tail) {
6378: $tail =""; # defined but blank.
6379: }
6380:
6381: &Debug("Command received: $command, encoded = $wasenc");
6382:
6383: if(defined $Dispatcher{$command}) {
6384:
6385: my $dispatch_info = $Dispatcher{$command};
6386: my $handler = $$dispatch_info[0];
6387: my $need_encode = $$dispatch_info[1];
6388: my $client_types = $$dispatch_info[2];
6389: Debug("Matched dispatch hash: mustencode: $need_encode "
6390: ."ClientType $client_types");
6391:
6392: # Validate the request:
6393:
6394: my $ok = 1;
6395: my $requesterprivs = 0;
6396: if(&isClient()) {
6397: $requesterprivs |= $CLIENT_OK;
6398: }
6399: if(&isManager()) {
6400: $requesterprivs |= $MANAGER_OK;
6401: }
6402: if($need_encode && (!$wasenc)) {
6403: Debug("Must encode but wasn't: $need_encode $wasenc");
6404: $ok = 0;
6405: }
6406: if(($client_types & $requesterprivs) == 0) {
6407: Debug("Client not privileged to do this operation");
6408: $ok = 0;
6409: }
6410: if ($ok) {
6411: if (ref($trust{$command}) eq 'HASH') {
6412: my $donechecks;
6413: if ($trust{$command}{'anywhere'}) {
6414: $donechecks = 1;
6415: } elsif ($trust{$command}{'manageronly'}) {
6416: unless (&isManager()) {
6417: $ok = 0;
6418: }
6419: $donechecks = 1;
6420: } elsif ($trust{$command}{'institutiononly'}) {
6421: unless ($clientsameinst) {
6422: $ok = 0;
6423: }
6424: $donechecks = 1;
6425: } elsif ($clientsameinst) {
6426: $donechecks = 1;
6427: }
6428: unless ($donechecks) {
6429: foreach my $rule (keys(%{$trust{$command}})) {
6430: next if ($rule eq 'remote');
6431: if ($trust{$command}{$rule}) {
6432: if ($clientprohibited{$rule}) {
6433: $ok = 0;
6434: } else {
6435: $ok = 1;
6436: $donechecks = 1;
6437: last;
6438: }
6439: }
6440: }
6441: }
6442: unless ($donechecks) {
6443: if ($trust{$command}{'remote'}) {
6444: if ($clientremoteok) {
6445: $ok = 1;
6446: } else {
6447: $ok = 0;
6448: }
6449: }
6450: }
6451: }
6452: }
6453:
6454: if($ok) {
6455: Debug("Dispatching to handler $command $tail");
6456: my $keep_going = &$handler($command, $tail, $client);
6457: return $keep_going;
6458: } else {
6459: Debug("Refusing to dispatch because client did not match requirements");
6460: Failure($client, "refused\n", $userinput);
6461: return 1;
6462: }
6463: }
6464:
6465: print $client "unknown_cmd\n";
6466: # -------------------------------------------------------------------- complete
6467: Debug("process_request - returning 1");
6468: return 1;
6469: }
6470: #
6471: # Decipher encoded traffic
6472: # Parameters:
6473: # input - Encoded data.
6474: # Returns:
6475: # Decoded data or undef if encryption key was not yet negotiated.
6476: # Implicit input:
6477: # cipher - This global holds the negotiated encryption key.
6478: #
6479: sub decipher {
6480: my ($input) = @_;
6481: my $output = '';
6482:
6483:
6484: if($cipher) {
6485: my($enc, $enclength, $encinput) = split(/:/, $input);
6486: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
6487: $output .=
6488: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
6489: }
6490: return substr($output, 0, $enclength);
6491: } else {
6492: return undef;
6493: }
6494: }
6495:
6496: #
6497: # Register a command processor. This function is invoked to register a sub
6498: # to process a request. Once registered, the ProcessRequest sub can automatically
6499: # dispatch requests to an appropriate sub, and do the top level validity checking
6500: # as well:
6501: # - Is the keyword recognized.
6502: # - Is the proper client type attempting the request.
6503: # - Is the request encrypted if it has to be.
6504: # Parameters:
6505: # $request_name - Name of the request being registered.
6506: # This is the command request that will match
6507: # against the hash keywords to lookup the information
6508: # associated with the dispatch information.
6509: # $procedure - Reference to a sub to call to process the request.
6510: # All subs get called as follows:
6511: # Procedure($cmd, $tail, $replyfd, $key)
6512: # $cmd - the actual keyword that invoked us.
6513: # $tail - the tail of the request that invoked us.
6514: # $replyfd- File descriptor connected to the client
6515: # $must_encode - True if the request must be encoded to be good.
6516: # $client_ok - True if it's ok for a client to request this.
6517: # $manager_ok - True if it's ok for a manager to request this.
6518: # Side effects:
6519: # - On success, the Dispatcher hash has an entry added for the key $RequestName
6520: # - On failure, the program will die as it's a bad internal bug to try to
6521: # register a duplicate command handler.
6522: #
6523: sub register_handler {
6524: my ($request_name,$procedure,$must_encode, $client_ok,$manager_ok) = @_;
6525:
6526: # Don't allow duplication#
6527:
6528: if (defined $Dispatcher{$request_name}) {
6529: die "Attempting to define a duplicate request handler for $request_name\n";
6530: }
6531: # Build the client type mask:
6532:
6533: my $client_type_mask = 0;
6534: if($client_ok) {
6535: $client_type_mask |= $CLIENT_OK;
6536: }
6537: if($manager_ok) {
6538: $client_type_mask |= $MANAGER_OK;
6539: }
6540:
6541: # Enter the hash:
6542:
6543: my @entry = ($procedure, $must_encode, $client_type_mask);
6544:
6545: $Dispatcher{$request_name} = \@entry;
6546:
6547: }
6548:
6549:
6550: #------------------------------------------------------------------
6551:
6552:
6553:
6554:
6555: #
6556: # Convert an error return code from lcpasswd to a string value.
6557: #
6558: sub lcpasswdstrerror {
6559: my $ErrorCode = shift;
6560: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
6561: return "lcpasswd Unrecognized error return value ".$ErrorCode;
6562: } else {
6563: return $passwderrors[$ErrorCode];
6564: }
6565: }
6566:
6567: # grabs exception and records it to log before exiting
6568: sub catchexception {
6569: my ($error)=@_;
6570: $SIG{'QUIT'}='DEFAULT';
6571: $SIG{__DIE__}='DEFAULT';
6572: &status("Catching exception");
6573: &logthis("<font color='red'>CRITICAL: "
6574: ."ABNORMAL EXIT. Child $$ for server ".$perlvar{'lonHostID'}." died through "
6575: ."a crash with this error msg->[$error]</font>");
6576: &logthis('Famous last words: '.$status.' - '.$lastlog);
6577: if ($client) { print $client "error: $error\n"; }
6578: $server->close();
6579: die($error);
6580: }
6581: sub timeout {
6582: &status("Handling Timeout");
6583: &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
6584: &catchexception('Timeout');
6585: }
6586: # -------------------------------- Set signal handlers to record abnormal exits
6587:
6588:
6589: $SIG{'QUIT'}=\&catchexception;
6590: $SIG{__DIE__}=\&catchexception;
6591:
6592: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
6593: &status("Read loncapa.conf and loncapa_apache.conf");
6594: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
6595: %perlvar=%{$perlvarref};
6596: undef $perlvarref;
6597:
6598: # ----------------------------- Make sure this process is running from user=www
6599: my $wwwid=getpwnam('www');
6600: if ($wwwid!=$<) {
6601: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
6602: my $subj="LON: $currenthostid User ID mismatch";
6603: system("echo 'User ID mismatch. lond must be run as user www.' |\
6604: mailto $emailto -s '$subj' > /dev/null");
6605: exit 1;
6606: }
6607:
6608: # --------------------------------------------- Check if other instance running
6609:
6610: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
6611:
6612: if (-e $pidfile) {
6613: my $lfh=IO::File->new("$pidfile");
6614: my $pide=<$lfh>;
6615: chomp($pide);
6616: if (kill 0 => $pide) { die "already running"; }
6617: }
6618:
6619: # ------------------------------------------------------------- Read hosts file
6620:
6621:
6622:
6623: # establish SERVER socket, bind and listen.
6624: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
6625: Type => SOCK_STREAM,
6626: Proto => 'tcp',
6627: ReuseAddr => 1,
6628: Listen => 10 )
6629: or die "making socket: $@\n";
6630:
6631: # --------------------------------------------------------- Do global variables
6632:
6633: # global variables
6634:
6635: my %children = (); # keys are current child process IDs
6636:
6637: sub REAPER { # takes care of dead children
6638: $SIG{CHLD} = \&REAPER;
6639: &status("Handling child death");
6640: my $pid;
6641: do {
6642: $pid = waitpid(-1,&WNOHANG());
6643: if (defined($children{$pid})) {
6644: &logthis("Child $pid died");
6645: delete($children{$pid});
6646: } elsif ($pid > 0) {
6647: &logthis("Unknown Child $pid died");
6648: }
6649: } while ( $pid > 0 );
6650: foreach my $child (keys(%children)) {
6651: $pid = waitpid($child,&WNOHANG());
6652: if ($pid > 0) {
6653: &logthis("Child $child - $pid looks like we missed it's death");
6654: delete($children{$pid});
6655: }
6656: }
6657: &status("Finished Handling child death");
6658: }
6659:
6660: sub HUNTSMAN { # signal handler for SIGINT
6661: &status("Killing children (INT)");
6662: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
6663: kill 'INT' => keys %children;
6664: &logthis("Free socket: ".shutdown($server,2)); # free up socket
6665: my $execdir=$perlvar{'lonDaemons'};
6666: unlink("$execdir/logs/lond.pid");
6667: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
6668: &status("Done killing children");
6669: exit; # clean up with dignity
6670: }
6671:
6672: sub HUPSMAN { # signal handler for SIGHUP
6673: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
6674: &status("Killing children for restart (HUP)");
6675: kill 'INT' => keys %children;
6676: &logthis("Free socket: ".shutdown($server,2)); # free up socket
6677: &logthis("<font color='red'>CRITICAL: Restarting</font>");
6678: my $execdir=$perlvar{'lonDaemons'};
6679: unlink("$execdir/logs/lond.pid");
6680: &status("Restarting self (HUP)");
6681: exec("$execdir/lond"); # here we go again
6682: }
6683:
6684: #
6685: # Reload the Apache daemon's state.
6686: # This is done by invoking /home/httpd/perl/apachereload
6687: # a setuid perl script that can be root for us to do this job.
6688: #
6689: sub ReloadApache {
6690: # --------------------------- Handle case of another apachereload process (locking)
6691: if (&LONCAPA::try_to_lock('/tmp/lock_apachereload')) {
6692: my $execdir = $perlvar{'lonDaemons'};
6693: my $script = $execdir."/apachereload";
6694: system($script);
6695: unlink('/tmp/lock_apachereload'); # Remove the lock file.
6696: }
6697: }
6698:
6699: #
6700: # Called in response to a USR2 signal.
6701: # - Reread hosts.tab
6702: # - All children connected to hosts that were removed from hosts.tab
6703: # are killed via SIGINT
6704: # - All children connected to previously existing hosts are sent SIGUSR1
6705: # - Our internal hosts hash is updated to reflect the new contents of
6706: # hosts.tab causing connections from hosts added to hosts.tab to
6707: # now be honored.
6708: #
6709: sub UpdateHosts {
6710: &status("Reload hosts.tab");
6711: logthis('<font color="blue"> Updating connections </font>');
6712: #
6713: # The %children hash has the set of IP's we currently have children
6714: # on. These need to be matched against records in the hosts.tab
6715: # Any ip's no longer in the table get killed off they correspond to
6716: # either dropped or changed hosts. Note that the re-read of the table
6717: # will take care of new and changed hosts as connections come into being.
6718:
6719: &Apache::lonnet::reset_hosts_info();
6720:
6721: foreach my $child (keys(%children)) {
6722: my $childip = $children{$child};
6723: if ($childip ne '127.0.0.1'
6724: && !defined(&Apache::lonnet::get_hosts_from_ip($childip))) {
6725: logthis('<font color="blue"> UpdateHosts killing child '
6726: ." $child for ip $childip </font>");
6727: kill('INT', $child);
6728: } else {
6729: logthis('<font color="green"> keeping child for ip '
6730: ." $childip (pid=$child) </font>");
6731: }
6732: }
6733: ReloadApache;
6734: &status("Finished reloading hosts.tab");
6735: }
6736:
6737:
6738: sub checkchildren {
6739: &status("Checking on the children (sending signals)");
6740: &initnewstatus();
6741: &logstatus();
6742: &logthis('Going to check on the children');
6743: my $docdir=$perlvar{'lonDocRoot'};
6744: foreach (sort keys %children) {
6745: #sleep 1;
6746: unless (kill 'USR1' => $_) {
6747: &logthis ('Child '.$_.' is dead');
6748: &logstatus($$.' is dead');
6749: delete($children{$_});
6750: }
6751: }
6752: sleep 5;
6753: $SIG{ALRM} = sub { Debug("timeout");
6754: die "timeout"; };
6755: $SIG{__DIE__} = 'DEFAULT';
6756: &status("Checking on the children (waiting for reports)");
6757: foreach (sort keys %children) {
6758: unless (-e "$docdir/lon-status/londchld/$_.txt") {
6759: eval {
6760: alarm(300);
6761: &logthis('Child '.$_.' did not respond');
6762: kill 9 => $_;
6763: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
6764: #$subj="LON: $currenthostid killed lond process $_";
6765: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
6766: #$execdir=$perlvar{'lonDaemons'};
6767: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
6768: delete($children{$_});
6769: alarm(0);
6770: }
6771: }
6772: }
6773: $SIG{ALRM} = 'DEFAULT';
6774: $SIG{__DIE__} = \&catchexception;
6775: &status("Finished checking children");
6776: &logthis('Finished Checking children');
6777: }
6778:
6779: # --------------------------------------------------------------------- Logging
6780:
6781: sub logthis {
6782: my $message=shift;
6783: my $execdir=$perlvar{'lonDaemons'};
6784: my $fh=IO::File->new(">>$execdir/logs/lond.log");
6785: my $now=time;
6786: my $local=localtime($now);
6787: $lastlog=$local.': '.$message;
6788: print $fh "$local ($$): $message\n";
6789: }
6790:
6791: # ------------------------- Conditional log if $DEBUG true.
6792: sub Debug {
6793: my $message = shift;
6794: if($DEBUG) {
6795: &logthis($message);
6796: }
6797: }
6798:
6799: #
6800: # Sub to do replies to client.. this gives a hook for some
6801: # debug tracing too:
6802: # Parameters:
6803: # fd - File open on client.
6804: # reply - Text to send to client.
6805: # request - Original request from client.
6806: #
6807: #NOTE $reply must be terminated by exactly *one* \n. If $reply is a reference
6808: #this is done automatically ($$reply must not contain any \n in this case).
6809: #If $reply is a string the caller has to ensure this.
6810: sub Reply {
6811: my ($fd, $reply, $request) = @_;
6812: if (ref($reply)) {
6813: print $fd $$reply;
6814: print $fd "\n";
6815: if ($DEBUG) { Debug("Request was $request Reply was $$reply"); }
6816: } else {
6817: print $fd $reply;
6818: if ($DEBUG) { Debug("Request was $request Reply was $reply"); }
6819: }
6820: $Transactions++;
6821: }
6822:
6823:
6824: #
6825: # Sub to report a failure.
6826: # This function:
6827: # - Increments the failure statistic counters.
6828: # - Invokes Reply to send the error message to the client.
6829: # Parameters:
6830: # fd - File descriptor open on the client
6831: # reply - Reply text to emit.
6832: # request - The original request message (used by Reply
6833: # to debug if that's enabled.
6834: # Implicit outputs:
6835: # $Failures- The number of failures is incremented.
6836: # Reply (invoked here) sends a message to the
6837: # client:
6838: #
6839: sub Failure {
6840: my $fd = shift;
6841: my $reply = shift;
6842: my $request = shift;
6843:
6844: $Failures++;
6845: Reply($fd, $reply, $request); # That's simple eh?
6846: }
6847: # ------------------------------------------------------------------ Log status
6848:
6849: sub logstatus {
6850: &status("Doing logging");
6851: my $docdir=$perlvar{'lonDocRoot'};
6852: {
6853: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
6854: print $fh $status."\n".$lastlog."\n".time."\n$keymode";
6855: $fh->close();
6856: }
6857: &status("Finished $$.txt");
6858: {
6859: open(LOG,">>$docdir/lon-status/londstatus.txt");
6860: flock(LOG,LOCK_EX);
6861: print LOG $$."\t".$clientname."\t".$currenthostid."\t"
6862: .$status."\t".$lastlog."\t $keymode\n";
6863: flock(LOG,LOCK_UN);
6864: close(LOG);
6865: }
6866: &status("Finished logging");
6867: }
6868:
6869: sub initnewstatus {
6870: my $docdir=$perlvar{'lonDocRoot'};
6871: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
6872: my $now=time();
6873: my $local=localtime($now);
6874: print $fh "LOND status $local - parent $$\n\n";
6875: opendir(DIR,"$docdir/lon-status/londchld");
6876: while (my $filename=readdir(DIR)) {
6877: unlink("$docdir/lon-status/londchld/$filename");
6878: }
6879: closedir(DIR);
6880: }
6881:
6882: # -------------------------------------------------------------- Status setting
6883:
6884: sub status {
6885: my $what=shift;
6886: my $now=time;
6887: my $local=localtime($now);
6888: $status=$local.': '.$what;
6889: $0='lond: '.$what.' '.$local;
6890: }
6891:
6892: # -------------------------------------------------------------- Talk to lonsql
6893:
6894: sub sql_reply {
6895: my ($cmd)=@_;
6896: my $answer=&sub_sql_reply($cmd);
6897: if ($answer eq 'con_lost') { $answer=&sub_sql_reply($cmd); }
6898: return $answer;
6899: }
6900:
6901: sub sub_sql_reply {
6902: my ($cmd)=@_;
6903: my $unixsock="mysqlsock";
6904: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
6905: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
6906: Type => SOCK_STREAM,
6907: Timeout => 10)
6908: or return "con_lost";
6909: print $sclient "$cmd:$currentdomainid\n";
6910: my $answer=<$sclient>;
6911: chomp($answer);
6912: if (!$answer) { $answer="con_lost"; }
6913: return $answer;
6914: }
6915:
6916: # --------------------------------------- Is this the home server of an author?
6917:
6918: sub ishome {
6919: my $author=shift;
6920: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
6921: my ($udom,$uname)=split(/\//,$author);
6922: my $proname=propath($udom,$uname);
6923: if (-e $proname) {
6924: return 'owner';
6925: } else {
6926: return 'not_owner';
6927: }
6928: }
6929:
6930: # ======================================================= Continue main program
6931: # ---------------------------------------------------- Fork once and dissociate
6932:
6933: my $fpid=fork;
6934: exit if $fpid;
6935: die "Couldn't fork: $!" unless defined ($fpid);
6936:
6937: POSIX::setsid() or die "Can't start new session: $!";
6938:
6939: # ------------------------------------------------------- Write our PID on disk
6940:
6941: my $execdir=$perlvar{'lonDaemons'};
6942: open (PIDSAVE,">$execdir/logs/lond.pid");
6943: print PIDSAVE "$$\n";
6944: close(PIDSAVE);
6945: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
6946: &status('Starting');
6947:
6948:
6949:
6950: # ----------------------------------------------------- Install signal handlers
6951:
6952:
6953: $SIG{CHLD} = \&REAPER;
6954: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
6955: $SIG{HUP} = \&HUPSMAN;
6956: $SIG{USR1} = \&checkchildren;
6957: $SIG{USR2} = \&UpdateHosts;
6958:
6959: # Read the host hashes:
6960: &Apache::lonnet::load_hosts_tab();
6961: my %iphost = &Apache::lonnet::get_iphost(1);
6962:
6963: $dist=`$perlvar{'lonDaemons'}/distprobe`;
6964:
6965: my $arch = `uname -i`;
6966: chomp($arch);
6967: if ($arch eq 'unknown') {
6968: $arch = `uname -m`;
6969: chomp($arch);
6970: }
6971:
6972: # --------------------------------------------------------------
6973: # Accept connections. When a connection comes in, it is validated
6974: # and if good, a child process is created to process transactions
6975: # along the connection.
6976:
6977: while (1) {
6978: &status('Starting accept');
6979: $client = $server->accept() or next;
6980: &status('Accepted '.$client.' off to spawn');
6981: make_new_child($client);
6982: &status('Finished spawning');
6983: }
6984:
6985: sub make_new_child {
6986: my $pid;
6987: # my $cipher; # Now global
6988: my $sigset;
6989:
6990: $client = shift;
6991: &status('Starting new child '.$client);
6992: &logthis('<font color="green"> Attempting to start child ('.$client.
6993: ")</font>");
6994: # block signal for fork
6995: $sigset = POSIX::SigSet->new(SIGINT);
6996: sigprocmask(SIG_BLOCK, $sigset)
6997: or die "Can't block SIGINT for fork: $!\n";
6998:
6999: die "fork: $!" unless defined ($pid = fork);
7000:
7001: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
7002: # connection liveness.
7003:
7004: #
7005: # Figure out who we're talking to so we can record the peer in
7006: # the pid hash.
7007: #
7008: my $caller = getpeername($client);
7009: my ($port,$iaddr);
7010: if (defined($caller) && length($caller) > 0) {
7011: ($port,$iaddr)=unpack_sockaddr_in($caller);
7012: } else {
7013: &logthis("Unable to determine who caller was, getpeername returned nothing");
7014: }
7015: if (defined($iaddr)) {
7016: $clientip = inet_ntoa($iaddr);
7017: Debug("Connected with $clientip");
7018: } else {
7019: &logthis("Unable to determine clientip");
7020: $clientip='Unavailable';
7021: }
7022:
7023: if ($pid) {
7024: # Parent records the child's birth and returns.
7025: sigprocmask(SIG_UNBLOCK, $sigset)
7026: or die "Can't unblock SIGINT for fork: $!\n";
7027: $children{$pid} = $clientip;
7028: &status('Started child '.$pid);
7029: close($client);
7030: return;
7031: } else {
7032: # Child can *not* return from this subroutine.
7033: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
7034: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
7035: #don't get intercepted
7036: $SIG{USR1}= \&logstatus;
7037: $SIG{ALRM}= \&timeout;
7038: #
7039: # Block sigpipe as it gets thrownon socket disconnect and we want to
7040: # deal with that as a read faiure instead.
7041: #
7042: my $blockset = POSIX::SigSet->new(SIGPIPE);
7043: sigprocmask(SIG_BLOCK, $blockset);
7044:
7045: $lastlog='Forked ';
7046: $status='Forked';
7047:
7048: # unblock signals
7049: sigprocmask(SIG_UNBLOCK, $sigset)
7050: or die "Can't unblock SIGINT for fork: $!\n";
7051:
7052: # my $tmpsnum=0; # Now global
7053: #---------------------------------------------------- kerberos 5 initialization
7054: &Authen::Krb5::init_context();
7055:
7056: my $no_ets;
7057: if ($dist =~ /^(?:centos|rhes|scientific)(\d+)$/) {
7058: if ($1 >= 7) {
7059: $no_ets = 1;
7060: }
7061: } elsif ($dist =~ /^suse(\d+\.\d+)$/) {
7062: if (($1 eq '9.3') || ($1 >= 12.2)) {
7063: $no_ets = 1;
7064: }
7065: } elsif ($dist =~ /^sles(\d+)$/) {
7066: if ($1 > 11) {
7067: $no_ets = 1;
7068: }
7069: } elsif ($dist =~ /^fedora(\d+)$/) {
7070: if ($1 < 7) {
7071: $no_ets = 1;
7072: }
7073: }
7074: unless ($no_ets) {
7075: &Authen::Krb5::init_ets();
7076: }
7077:
7078: &status('Accepted connection');
7079: # =============================================================================
7080: # do something with the connection
7081: # -----------------------------------------------------------------------------
7082: # see if we know client and 'check' for spoof IP by ineffective challenge
7083:
7084: my $outsideip=$clientip;
7085: if ($clientip eq '127.0.0.1') {
7086: $outsideip=&Apache::lonnet::get_host_ip($perlvar{'lonHostID'});
7087: }
7088: &ReadManagerTable();
7089: my $clientrec=defined(&Apache::lonnet::get_hosts_from_ip($outsideip));
7090: my $ismanager=($managers{$outsideip} ne undef);
7091: $clientname = "[unknown]";
7092: if($clientrec) { # Establish client type.
7093: $ConnectionType = "client";
7094: $clientname = (&Apache::lonnet::get_hosts_from_ip($outsideip))[-1];
7095: if($ismanager) {
7096: $ConnectionType = "both";
7097: }
7098: } else {
7099: $ConnectionType = "manager";
7100: $clientname = $managers{$outsideip};
7101: }
7102: my $clientok;
7103:
7104: if ($clientrec || $ismanager) {
7105: &status("Waiting for init from $clientip $clientname");
7106: &logthis('<font color="yellow">INFO: Connection, '.
7107: $clientip.
7108: " ($clientname) connection type = $ConnectionType </font>" );
7109: &status("Connecting $clientip ($clientname))");
7110: my $remotereq=<$client>;
7111: chomp($remotereq);
7112: Debug("Got init: $remotereq");
7113:
7114: if ($remotereq =~ /^init/) {
7115: &sethost("sethost:$perlvar{'lonHostID'}");
7116: #
7117: # If the remote is attempting a local init... give that a try:
7118: #
7119: (my $i, my $inittype, $clientversion) = split(/:/, $remotereq);
7120: # For LON-CAPA 2.9, the client session will have sent its LON-CAPA
7121: # version when initiating the connection. For LON-CAPA 2.8 and older,
7122: # the version is retrieved from the global %loncaparevs in lonnet.pm.
7123: # $clientversion contains path to keyfile if $inittype eq 'local'
7124: # it's overridden below in this case
7125: $clientversion ||= $Apache::lonnet::loncaparevs{$clientname};
7126:
7127: # If the connection type is ssl, but I didn't get my
7128: # certificate files yet, then I'll drop back to
7129: # insecure (if allowed).
7130:
7131: if($inittype eq "ssl") {
7132: my ($ca, $cert) = lonssl::CertificateFile;
7133: my $kfile = lonssl::KeyFile;
7134: if((!$ca) ||
7135: (!$cert) ||
7136: (!$kfile)) {
7137: $inittype = ""; # This forces insecure attempt.
7138: &logthis("<font color=\"blue\"> Certificates not "
7139: ."installed -- trying insecure auth</font>");
7140: } else { # SSL certificates are in place so
7141: } # Leave the inittype alone.
7142: }
7143:
7144: if($inittype eq "local") {
7145: $clientversion = $perlvar{'lonVersion'};
7146: my $key = LocalConnection($client, $remotereq);
7147: if($key) {
7148: Debug("Got local key $key");
7149: $clientok = 1;
7150: my $cipherkey = pack("H32", $key);
7151: $cipher = new IDEA($cipherkey);
7152: print $client "ok:local\n";
7153: &logthis('<font color="green">'
7154: . "Successful local authentication </font>");
7155: $keymode = "local"
7156: } else {
7157: Debug("Failed to get local key");
7158: $clientok = 0;
7159: shutdown($client, 3);
7160: close $client;
7161: }
7162: } elsif ($inittype eq "ssl") {
7163: my $key = SSLConnection($client);
7164: if ($key) {
7165: $clientok = 1;
7166: my $cipherkey = pack("H32", $key);
7167: $cipher = new IDEA($cipherkey);
7168: &logthis('<font color="green">'
7169: ."Successfull ssl authentication with $clientname </font>");
7170: $keymode = "ssl";
7171:
7172: } else {
7173: $clientok = 0;
7174: close $client;
7175: }
7176:
7177: } else {
7178: my $ok = InsecureConnection($client);
7179: if($ok) {
7180: $clientok = 1;
7181: &logthis('<font color="green">'
7182: ."Successful insecure authentication with $clientname </font>");
7183: print $client "ok\n";
7184: $keymode = "insecure";
7185: } else {
7186: &logthis('<font color="yellow">'
7187: ."Attempted insecure connection disallowed </font>");
7188: close $client;
7189: $clientok = 0;
7190:
7191: }
7192: }
7193: } else {
7194: &logthis(
7195: "<font color='blue'>WARNING: "
7196: ."$clientip failed to initialize: >$remotereq< </font>");
7197: &status('No init '.$clientip);
7198: }
7199:
7200: } else {
7201: &logthis(
7202: "<font color='blue'>WARNING: Unknown client $clientip</font>");
7203: &status('Hung up on '.$clientip);
7204: }
7205:
7206: if ($clientok) {
7207: # ---------------- New known client connecting, could mean machine online again
7208: if (&Apache::lonnet::get_host_ip($currenthostid) ne $clientip
7209: && $clientip ne '127.0.0.1') {
7210: &Apache::lonnet::reconlonc($clientname);
7211: }
7212: &logthis("<font color='green'>Established connection: $clientname</font>");
7213: &status('Will listen to '.$clientname);
7214: # ------------------------------------------------------------ Process requests
7215: my $keep_going = 1;
7216: my $user_input;
7217: my $clienthost = &Apache::lonnet::hostname($clientname);
7218: my $clientserverhomeID = &Apache::lonnet::get_server_homeID($clienthost);
7219: $clienthomedom = &Apache::lonnet::host_domain($clientserverhomeID);
7220: $clientintdom = &Apache::lonnet::internet_dom($clientserverhomeID);
7221: $clientsameinst = 0;
7222: if ($clientintdom ne '') {
7223: my $internet_names = &Apache::lonnet::get_internet_names($currenthostid);
7224: if (ref($internet_names) eq 'ARRAY') {
7225: if (grep(/^\Q$clientintdom\E$/,@{$internet_names})) {
7226: $clientsameinst = 1;
7227: }
7228: }
7229: }
7230: $clientremoteok = 0;
7231: unless ($clientsameinst) {
7232: $clientremoteok = 1;
7233: my $defdom = &Apache::lonnet::host_domain($perlvar{'lonHostID'});
7234: %clientprohibited = &get_prohibited($defdom);
7235: if ($clientintdom) {
7236: my $remsessconf = &get_usersession_config($defdom,'remotesession');
7237: if (ref($remsessconf) eq 'HASH') {
7238: if (ref($remsessconf->{'remote'}) eq 'HASH') {
7239: if (ref($remsessconf->{'remote'}->{'excludedomain'}) eq 'ARRAY') {
7240: if (grep(/^\Q$clientintdom\E$/,@{$remsessconf->{'remote'}->{'excludedomain'}})) {
7241: $clientremoteok = 0;
7242: }
7243: }
7244: if (ref($remsessconf->{'remote'}->{'includedomain'}) eq 'ARRAY') {
7245: if (grep(/^\Q$clientintdom\E$/,@{$remsessconf->{'remote'}->{'includedomain'}})) {
7246: $clientremoteok = 1;
7247: } else {
7248: $clientremoteok = 0;
7249: }
7250: }
7251: }
7252: }
7253: }
7254: }
7255: while(($user_input = get_request) && $keep_going) {
7256: alarm(120);
7257: Debug("Main: Got $user_input\n");
7258: $keep_going = &process_request($user_input);
7259: alarm(0);
7260: &status('Listening to '.$clientname." ($keymode)");
7261: }
7262:
7263: # --------------------------------------------- client unknown or fishy, refuse
7264: } else {
7265: print $client "refused\n";
7266: $client->close();
7267: &logthis("<font color='blue'>WARNING: "
7268: ."Rejected client $clientip, closing connection</font>");
7269: }
7270: }
7271:
7272: # =============================================================================
7273:
7274: &logthis("<font color='red'>CRITICAL: "
7275: ."Disconnect from $clientip ($clientname)</font>");
7276:
7277:
7278: # this exit is VERY important, otherwise the child will become
7279: # a producer of more and more children, forking yourself into
7280: # process death.
7281: exit;
7282:
7283: }
7284: #
7285: # Determine if a user is an author for the indicated domain.
7286: #
7287: # Parameters:
7288: # domain - domain to check in .
7289: # user - Name of user to check.
7290: #
7291: # Return:
7292: # 1 - User is an author for domain.
7293: # 0 - User is not an author for domain.
7294: sub is_author {
7295: my ($domain, $user) = @_;
7296:
7297: &Debug("is_author: $user @ $domain");
7298:
7299: my $hashref = &tie_user_hash($domain, $user, "roles",
7300: &GDBM_READER());
7301:
7302: # Author role should show up as a key /domain/_au
7303:
7304: my $value;
7305: if ($hashref) {
7306:
7307: my $key = "/$domain/_au";
7308: if (defined($hashref)) {
7309: $value = $hashref->{$key};
7310: if(!untie_user_hash($hashref)) {
7311: return 'error: ' . ($!+0)." untie (GDBM) Failed";
7312: }
7313: }
7314:
7315: if(defined($value)) {
7316: &Debug("$user @ $domain is an author");
7317: }
7318: } else {
7319: return 'error: '.($!+0)." tie (GDBM) Failed";
7320: }
7321:
7322: return defined($value);
7323: }
7324: #
7325: # Checks to see if the input roleput request was to set
7326: # an author role. If so, creates construction space
7327: # Parameters:
7328: # request - The request sent to the rolesput subchunk.
7329: # We're looking for /domain/_au
7330: # domain - The domain in which the user is having roles doctored.
7331: # user - Name of the user for which the role is being put.
7332: # authtype - The authentication type associated with the user.
7333: #
7334: sub manage_permissions {
7335: my ($request, $domain, $user, $authtype) = @_;
7336: # See if the request is of the form /$domain/_au
7337: if($request =~ /^(\/\Q$domain\E\/_au)$/) { # It's an author rolesput...
7338: my $path=$perlvar{'lonDocRoot'}."/priv/$domain";
7339: unless (-e $path) {
7340: mkdir($path);
7341: }
7342: unless (-e $path.'/'.$user) {
7343: mkdir($path.'/'.$user);
7344: }
7345: }
7346: }
7347:
7348:
7349: #
7350: # Return the full path of a user password file, whether it exists or not.
7351: # Parameters:
7352: # domain - Domain in which the password file lives.
7353: # user - name of the user.
7354: # Returns:
7355: # Full passwd path:
7356: #
7357: sub password_path {
7358: my ($domain, $user) = @_;
7359: return &propath($domain, $user).'/passwd';
7360: }
7361:
7362: # Password Filename
7363: # Returns the path to a passwd file given domain and user... only if
7364: # it exists.
7365: # Parameters:
7366: # domain - Domain in which to search.
7367: # user - username.
7368: # Returns:
7369: # - If the password file exists returns its path.
7370: # - If the password file does not exist, returns undefined.
7371: #
7372: sub password_filename {
7373: my ($domain, $user) = @_;
7374:
7375: Debug ("PasswordFilename called: dom = $domain user = $user");
7376:
7377: my $path = &password_path($domain, $user);
7378: Debug("PasswordFilename got path: $path");
7379: if(-e $path) {
7380: return $path;
7381: } else {
7382: return undef;
7383: }
7384: }
7385:
7386: #
7387: # Rewrite the contents of the user's passwd file.
7388: # Parameters:
7389: # domain - domain of the user.
7390: # name - User's name.
7391: # contents - New contents of the file.
7392: # Returns:
7393: # 0 - Failed.
7394: # 1 - Success.
7395: #
7396: sub rewrite_password_file {
7397: my ($domain, $user, $contents) = @_;
7398:
7399: my $file = &password_filename($domain, $user);
7400: if (defined $file) {
7401: my $pf = IO::File->new(">$file");
7402: if($pf) {
7403: print $pf "$contents\n";
7404: return 1;
7405: } else {
7406: return 0;
7407: }
7408: } else {
7409: return 0;
7410: }
7411:
7412: }
7413:
7414: #
7415: # get_auth_type - Determines the authorization type of a user in a domain.
7416:
7417: # Returns the authorization type or nouser if there is no such user.
7418: #
7419: sub get_auth_type {
7420: my ($domain, $user) = @_;
7421:
7422: Debug("get_auth_type( $domain, $user ) \n");
7423: my $proname = &propath($domain, $user);
7424: my $passwdfile = "$proname/passwd";
7425: if( -e $passwdfile ) {
7426: my $pf = IO::File->new($passwdfile);
7427: my $realpassword = <$pf>;
7428: chomp($realpassword);
7429: Debug("Password info = $realpassword\n");
7430: my ($authtype, $contentpwd) = split(/:/, $realpassword);
7431: Debug("Authtype = $authtype, content = $contentpwd\n");
7432: return "$authtype:$contentpwd";
7433: } else {
7434: Debug("Returning nouser");
7435: return "nouser";
7436: }
7437: }
7438:
7439: #
7440: # Validate a user given their domain, name and password. This utility
7441: # function is used by both AuthenticateHandler and ChangePasswordHandler
7442: # to validate the login credentials of a user.
7443: # Parameters:
7444: # $domain - The domain being logged into (this is required due to
7445: # the capability for multihomed systems.
7446: # $user - The name of the user being validated.
7447: # $password - The user's propoposed password.
7448: #
7449: # Returns:
7450: # 1 - The domain,user,pasword triplet corresponds to a valid
7451: # user.
7452: # 0 - The domain,user,password triplet is not a valid user.
7453: #
7454: sub validate_user {
7455: my ($domain, $user, $password, $checkdefauth) = @_;
7456:
7457: # Why negative ~pi you may well ask? Well this function is about
7458: # authentication, and therefore very important to get right.
7459: # I've initialized the flag that determines whether or not I've
7460: # validated correctly to a value it's not supposed to get.
7461: # At the end of this function. I'll ensure that it's not still that
7462: # value so we don't just wind up returning some accidental value
7463: # as a result of executing an unforseen code path that
7464: # did not set $validated. At the end of valid execution paths,
7465: # validated shoule be 1 for success or 0 for failuer.
7466:
7467: my $validated = -3.14159;
7468:
7469: # How we authenticate is determined by the type of authentication
7470: # the user has been assigned. If the authentication type is
7471: # "nouser", the user does not exist so we will return 0.
7472:
7473: my $contents = &get_auth_type($domain, $user);
7474: my ($howpwd, $contentpwd) = split(/:/, $contents);
7475:
7476: my $null = pack("C",0); # Used by kerberos auth types.
7477:
7478: if ($howpwd eq 'nouser') {
7479: if ($checkdefauth) {
7480: my %domdefaults = &Apache::lonnet::get_domain_defaults($domain);
7481: if ($domdefaults{'auth_def'} eq 'localauth') {
7482: $howpwd = $domdefaults{'auth_def'};
7483: $contentpwd = $domdefaults{'auth_arg_def'};
7484: } elsif ((($domdefaults{'auth_def'} eq 'krb4') ||
7485: ($domdefaults{'auth_def'} eq 'krb5')) &&
7486: ($domdefaults{'auth_arg_def'} ne '')) {
7487: $howpwd = $domdefaults{'auth_def'};
7488: $contentpwd = $domdefaults{'auth_arg_def'};
7489: }
7490: }
7491: }
7492: if ($howpwd ne 'nouser') {
7493: if($howpwd eq "internal") { # Encrypted is in local password file.
7494: if (length($contentpwd) == 13) {
7495: $validated = (crypt($password,$contentpwd) eq $contentpwd);
7496: if ($validated) {
7497: my $ncpass = &hash_passwd($domain,$password);
7498: if (&rewrite_password_file($domain,$user,"$howpwd:$ncpass")) {
7499: &update_passwd_history($user,$domain,$howpwd,'conversion');
7500: &logthis("Validated password hashed with bcrypt for $user:$domain");
7501: }
7502: }
7503: } else {
7504: $validated = &check_internal_passwd($password,$contentpwd,$domain);
7505: }
7506: }
7507: elsif ($howpwd eq "unix") { # User is a normal unix user.
7508: $contentpwd = (getpwnam($user))[1];
7509: if($contentpwd) {
7510: if($contentpwd eq 'x') { # Shadow password file...
7511: my $pwauth_path = "/usr/local/sbin/pwauth";
7512: open PWAUTH, "|$pwauth_path" or
7513: die "Cannot invoke authentication";
7514: print PWAUTH "$user\n$password\n";
7515: close PWAUTH;
7516: $validated = ! $?;
7517:
7518: } else { # Passwords in /etc/passwd.
7519: $validated = (crypt($password,
7520: $contentpwd) eq $contentpwd);
7521: }
7522: } else {
7523: $validated = 0;
7524: }
7525: } elsif ($howpwd eq "krb4") { # user is in kerberos 4 auth. domain.
7526: my $checkwithkrb5 = 0;
7527: if ($dist =~/^fedora(\d+)$/) {
7528: if ($1 > 11) {
7529: $checkwithkrb5 = 1;
7530: }
7531: } elsif ($dist =~ /^suse([\d.]+)$/) {
7532: if ($1 > 11.1) {
7533: $checkwithkrb5 = 1;
7534: }
7535: }
7536: if ($checkwithkrb5) {
7537: $validated = &krb5_authen($password,$null,$user,$contentpwd);
7538: } else {
7539: $validated = &krb4_authen($password,$null,$user,$contentpwd);
7540: }
7541: } elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain.
7542: $validated = &krb5_authen($password,$null,$user,$contentpwd);
7543: } elsif ($howpwd eq "localauth") {
7544: # Authenticate via installation specific authentcation method:
7545: $validated = &localauth::localauth($user,
7546: $password,
7547: $contentpwd,
7548: $domain);
7549: if ($validated < 0) {
7550: &logthis("localauth for $contentpwd $user:$domain returned a $validated");
7551: $validated = 0;
7552: }
7553: } else { # Unrecognized auth is also bad.
7554: $validated = 0;
7555: }
7556: } else {
7557: $validated = 0;
7558: }
7559: #
7560: # $validated has the correct stat of the authentication:
7561: #
7562:
7563: unless ($validated != -3.14159) {
7564: # I >really really< want to know if this happens.
7565: # since it indicates that user authentication is badly
7566: # broken in some code path.
7567: #
7568: die "ValidateUser - failed to set the value of validated $domain, $user $password";
7569: }
7570: return $validated;
7571: }
7572:
7573: sub check_internal_passwd {
7574: my ($plainpass,$stored,$domain) = @_;
7575: my (undef,$method,@rest) = split(/!/,$stored);
7576: if ($method eq "bcrypt") {
7577: my $result = &hash_passwd($domain,$plainpass,@rest);
7578: if ($result ne $stored) {
7579: return 0;
7580: }
7581: # Upgrade to a larger number of rounds if necessary
7582: my $defaultcost;
7583: my %domconfig =
7584: &Apache::lonnet::get_dom('configuration',['password'],$domain);
7585: if (ref($domconfig{'password'}) eq 'HASH') {
7586: $defaultcost = $domconfig{'password'}{'cost'};
7587: }
7588: if (($defaultcost eq '') || ($defaultcost =~ /D/)) {
7589: $defaultcost = 10;
7590: }
7591: return 1 unless($rest[0]<$defaultcost);
7592: }
7593: return 0;
7594: }
7595:
7596: sub get_last_authchg {
7597: my ($domain,$user) = @_;
7598: my $lastmod;
7599: my $logname = &propath($domain,$user).'/passwd.log';
7600: if (-e "$logname") {
7601: $lastmod = (stat("$logname"))[9];
7602: }
7603: return $lastmod;
7604: }
7605:
7606: sub krb4_authen {
7607: my ($password,$null,$user,$contentpwd) = @_;
7608: my $validated = 0;
7609: if (!($password =~ /$null/) ) { # Null password not allowed.
7610: eval {
7611: require Authen::Krb4;
7612: };
7613: if (!$@) {
7614: my $k4error = &Authen::Krb4::get_pw_in_tkt($user,
7615: "",
7616: $contentpwd,,
7617: 'krbtgt',
7618: $contentpwd,
7619: 1,
7620: $password);
7621: if(!$k4error) {
7622: $validated = 1;
7623: } else {
7624: $validated = 0;
7625: &logthis('krb4: '.$user.', '.$contentpwd.', '.
7626: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
7627: }
7628: } else {
7629: $validated = krb5_authen($password,$null,$user,$contentpwd);
7630: }
7631: }
7632: return $validated;
7633: }
7634:
7635: sub krb5_authen {
7636: my ($password,$null,$user,$contentpwd) = @_;
7637: my $validated = 0;
7638: if(!($password =~ /$null/)) { # Null password not allowed.
7639: my $krbclient = &Authen::Krb5::parse_name($user.'@'
7640: .$contentpwd);
7641: my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd;
7642: my $krbserver = &Authen::Krb5::parse_name($krbservice);
7643: my $credentials= &Authen::Krb5::cc_default();
7644: $credentials->initialize(&Authen::Krb5::parse_name($user.'@'
7645: .$contentpwd));
7646: my $krbreturn;
7647: if (exists(&Authen::Krb5::get_init_creds_password)) {
7648: $krbreturn =
7649: &Authen::Krb5::get_init_creds_password($krbclient,$password,
7650: $krbservice);
7651: $validated = (ref($krbreturn) eq 'Authen::Krb5::Creds');
7652: } else {
7653: $krbreturn =
7654: &Authen::Krb5::get_in_tkt_with_password($krbclient,$krbserver,
7655: $password,$credentials);
7656: $validated = ($krbreturn == 1);
7657: }
7658: if (!$validated) {
7659: &logthis('krb5: '.$user.', '.$contentpwd.', '.
7660: &Authen::Krb5::error());
7661: }
7662: }
7663: return $validated;
7664: }
7665:
7666: sub addline {
7667: my ($fname,$hostid,$ip,$newline)=@_;
7668: my $contents;
7669: my $found=0;
7670: my $expr='^'.quotemeta($hostid).':'.quotemeta($ip).':';
7671: my $sh;
7672: if ($sh=IO::File->new("$fname.subscription")) {
7673: while (my $subline=<$sh>) {
7674: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
7675: }
7676: $sh->close();
7677: }
7678: $sh=IO::File->new(">$fname.subscription");
7679: if ($contents) { print $sh $contents; }
7680: if ($newline) { print $sh $newline; }
7681: $sh->close();
7682: return $found;
7683: }
7684:
7685: sub get_chat {
7686: my ($cdom,$cname,$udom,$uname,$group)=@_;
7687:
7688: my @entries=();
7689: my $namespace = 'nohist_chatroom';
7690: my $namespace_inroom = 'nohist_inchatroom';
7691: if ($group ne '') {
7692: $namespace .= '_'.$group;
7693: $namespace_inroom .= '_'.$group;
7694: }
7695: my $hashref = &tie_user_hash($cdom, $cname, $namespace,
7696: &GDBM_READER());
7697: if ($hashref) {
7698: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
7699: &untie_user_hash($hashref);
7700: }
7701: my @participants=();
7702: my $cutoff=time-60;
7703: $hashref = &tie_user_hash($cdom, $cname, $namespace_inroom,
7704: &GDBM_WRCREAT());
7705: if ($hashref) {
7706: $hashref->{$uname.':'.$udom}=time;
7707: foreach my $user (sort(keys(%$hashref))) {
7708: if ($hashref->{$user}>$cutoff) {
7709: push(@participants, 'active_participant:'.$user);
7710: }
7711: }
7712: &untie_user_hash($hashref);
7713: }
7714: return (@participants,@entries);
7715: }
7716:
7717: sub chat_add {
7718: my ($cdom,$cname,$newchat,$group)=@_;
7719: my @entries=();
7720: my $time=time;
7721: my $namespace = 'nohist_chatroom';
7722: my $logfile = 'chatroom.log';
7723: if ($group ne '') {
7724: $namespace .= '_'.$group;
7725: $logfile = 'chatroom_'.$group.'.log';
7726: }
7727: my $hashref = &tie_user_hash($cdom, $cname, $namespace,
7728: &GDBM_WRCREAT());
7729: if ($hashref) {
7730: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
7731: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
7732: my ($thentime,$idnum)=split(/\_/,$lastid);
7733: my $newid=$time.'_000000';
7734: if ($thentime==$time) {
7735: $idnum=~s/^0+//;
7736: $idnum++;
7737: $idnum=substr('000000'.$idnum,-6,6);
7738: $newid=$time.'_'.$idnum;
7739: }
7740: $hashref->{$newid}=$newchat;
7741: my $expired=$time-3600;
7742: foreach my $comment (keys(%$hashref)) {
7743: my ($thistime) = ($comment=~/(\d+)\_/);
7744: if ($thistime<$expired) {
7745: delete $hashref->{$comment};
7746: }
7747: }
7748: {
7749: my $proname=&propath($cdom,$cname);
7750: if (open(CHATLOG,">>$proname/$logfile")) {
7751: print CHATLOG ("$time:".&unescape($newchat)."\n");
7752: }
7753: close(CHATLOG);
7754: }
7755: &untie_user_hash($hashref);
7756: }
7757: }
7758:
7759: sub unsub {
7760: my ($fname,$clientip)=@_;
7761: my $result;
7762: my $unsubs = 0; # Number of successful unsubscribes:
7763:
7764:
7765: # An old way subscriptions were handled was to have a
7766: # subscription marker file:
7767:
7768: Debug("Attempting unlink of $fname.$clientname");
7769: if (unlink("$fname.$clientname")) {
7770: $unsubs++; # Successful unsub via marker file.
7771: }
7772:
7773: # The more modern way to do it is to have a subscription list
7774: # file:
7775:
7776: if (-e "$fname.subscription") {
7777: my $found=&addline($fname,$clientname,$clientip,'');
7778: if ($found) {
7779: $unsubs++;
7780: }
7781: }
7782:
7783: # If either or both of these mechanisms succeeded in unsubscribing a
7784: # resource we can return ok:
7785:
7786: if($unsubs) {
7787: $result = "ok\n";
7788: } else {
7789: $result = "not_subscribed\n";
7790: }
7791:
7792: return $result;
7793: }
7794:
7795: sub currentversion {
7796: my $fname=shift;
7797: my $version=-1;
7798: my $ulsdir='';
7799: if ($fname=~/^(.+)\/[^\/]+$/) {
7800: $ulsdir=$1;
7801: }
7802: my ($fnamere1,$fnamere2);
7803: # remove version if already specified
7804: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
7805: # get the bits that go before and after the version number
7806: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
7807: $fnamere1=$1;
7808: $fnamere2='.'.$2;
7809: }
7810: if (-e $fname) { $version=1; }
7811: if (-e $ulsdir) {
7812: if(-d $ulsdir) {
7813: if (opendir(LSDIR,$ulsdir)) {
7814: my $ulsfn;
7815: while ($ulsfn=readdir(LSDIR)) {
7816: # see if this is a regular file (ignore links produced earlier)
7817: my $thisfile=$ulsdir.'/'.$ulsfn;
7818: unless (-l $thisfile) {
7819: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
7820: if ($1>$version) { $version=$1; }
7821: }
7822: }
7823: }
7824: closedir(LSDIR);
7825: $version++;
7826: }
7827: }
7828: }
7829: return $version;
7830: }
7831:
7832: sub thisversion {
7833: my $fname=shift;
7834: my $version=-1;
7835: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
7836: $version=$1;
7837: }
7838: return $version;
7839: }
7840:
7841: sub subscribe {
7842: my ($userinput,$clientip)=@_;
7843: my $result;
7844: my ($cmd,$fname)=split(/:/,$userinput,2);
7845: my $ownership=&ishome($fname);
7846: if ($ownership eq 'owner') {
7847: # explitly asking for the current version?
7848: unless (-e $fname) {
7849: my $currentversion=¤tversion($fname);
7850: if (&thisversion($fname)==$currentversion) {
7851: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
7852: my $root=$1;
7853: my $extension=$2;
7854: symlink($root.'.'.$extension,
7855: $root.'.'.$currentversion.'.'.$extension);
7856: unless ($extension=~/\.meta$/) {
7857: symlink($root.'.'.$extension.'.meta',
7858: $root.'.'.$currentversion.'.'.$extension.'.meta');
7859: }
7860: }
7861: }
7862: }
7863: if (-e $fname) {
7864: if (-d $fname) {
7865: $result="directory\n";
7866: } else {
7867: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
7868: my $now=time;
7869: my $found=&addline($fname,$clientname,$clientip,
7870: "$clientname:$clientip:$now\n");
7871: if ($found) { $result="$fname\n"; }
7872: # if they were subscribed to only meta data, delete that
7873: # subscription, when you subscribe to a file you also get
7874: # the metadata
7875: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
7876: $fname=~s/\/home\/httpd\/html\/res/raw/;
7877: my $protocol = $Apache::lonnet::protocol{$perlvar{'lonHostID'}};
7878: $protocol = 'http' if ($protocol ne 'https');
7879: $fname=$protocol.'://'.&Apache::lonnet::hostname($perlvar{'lonHostID'})."/".$fname;
7880: $result="$fname\n";
7881: }
7882: } else {
7883: $result="not_found\n";
7884: }
7885: } else {
7886: $result="rejected\n";
7887: }
7888: return $result;
7889: }
7890: # Change the passwd of a unix user. The caller must have
7891: # first verified that the user is a loncapa user.
7892: #
7893: # Parameters:
7894: # user - Unix user name to change.
7895: # pass - New password for the user.
7896: # Returns:
7897: # ok - if success
7898: # other - Some meaningfule error message string.
7899: # NOTE:
7900: # invokes a setuid script to change the passwd.
7901: sub change_unix_password {
7902: my ($user, $pass) = @_;
7903:
7904: &Debug("change_unix_password");
7905: my $execdir=$perlvar{'lonDaemons'};
7906: &Debug("Opening lcpasswd pipeline");
7907: my $pf = IO::File->new("|$execdir/lcpasswd > "
7908: ."$perlvar{'lonDaemons'}"
7909: ."/logs/lcpasswd.log");
7910: print $pf "$user\n$pass\n$pass\n";
7911: close $pf;
7912: my $err = $?;
7913: return ($err < @passwderrors) ? $passwderrors[$err] :
7914: "pwchange_falure - unknown error";
7915:
7916:
7917: }
7918:
7919:
7920: sub make_passwd_file {
7921: my ($uname,$udom,$umode,$npass,$passfilename,$action)=@_;
7922: my $result="ok";
7923: if ($umode eq 'krb4' or $umode eq 'krb5') {
7924: {
7925: my $pf = IO::File->new(">$passfilename");
7926: if ($pf) {
7927: print $pf "$umode:$npass\n";
7928: &update_passwd_history($uname,$udom,$umode,$action);
7929: } else {
7930: $result = "pass_file_failed_error";
7931: }
7932: }
7933: } elsif ($umode eq 'internal') {
7934: my $ncpass = &hash_passwd($udom,$npass);
7935: {
7936: &Debug("Creating internal auth");
7937: my $pf = IO::File->new(">$passfilename");
7938: if($pf) {
7939: print $pf "internal:$ncpass\n";
7940: &update_passwd_history($uname,$udom,$umode,$action);
7941: } else {
7942: $result = "pass_file_failed_error";
7943: }
7944: }
7945: } elsif ($umode eq 'localauth') {
7946: {
7947: my $pf = IO::File->new(">$passfilename");
7948: if($pf) {
7949: print $pf "localauth:$npass\n";
7950: &update_passwd_history($uname,$udom,$umode,$action);
7951: } else {
7952: $result = "pass_file_failed_error";
7953: }
7954: }
7955: } elsif ($umode eq 'unix') {
7956: &logthis(">>>Attempt to create unix account blocked -- unix auth not available for new users.");
7957: $result="no_new_unix_accounts";
7958: } elsif ($umode eq 'none') {
7959: {
7960: my $pf = IO::File->new("> $passfilename");
7961: if($pf) {
7962: print $pf "none:\n";
7963: } else {
7964: $result = "pass_file_failed_error";
7965: }
7966: }
7967: } else {
7968: $result="auth_mode_error";
7969: }
7970: return $result;
7971: }
7972:
7973: sub convert_photo {
7974: my ($start,$dest)=@_;
7975: system("convert $start $dest");
7976: }
7977:
7978: sub sethost {
7979: my ($remotereq) = @_;
7980: my (undef,$hostid)=split(/:/,$remotereq);
7981: # ignore sethost if we are already correct
7982: if ($hostid eq $currenthostid) {
7983: return 'ok';
7984: }
7985:
7986: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
7987: if (&Apache::lonnet::get_host_ip($perlvar{'lonHostID'})
7988: eq &Apache::lonnet::get_host_ip($hostid)) {
7989: $currenthostid =$hostid;
7990: $currentdomainid=&Apache::lonnet::host_domain($hostid);
7991: # &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
7992: } else {
7993: &logthis("Requested host id $hostid not an alias of ".
7994: $perlvar{'lonHostID'}." refusing connection");
7995: return 'unable_to_set';
7996: }
7997: return 'ok';
7998: }
7999:
8000: sub version {
8001: my ($userinput)=@_;
8002: $remoteVERSION=(split(/:/,$userinput))[1];
8003: return "version:$VERSION";
8004: }
8005:
8006: sub get_usersession_config {
8007: my ($dom,$name) = @_;
8008: my ($usersessionconf,$cached)=&Apache::lonnet::is_cached_new($name,$dom);
8009: if (defined($cached)) {
8010: return $usersessionconf;
8011: } else {
8012: my %domconfig = &Apache::lonnet::get_dom('configuration',['usersessions'],$dom);
8013: &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'usersessions'},3600);
8014: return $domconfig{'usersessions'};
8015: }
8016: return;
8017: }
8018:
8019: sub get_prohibited {
8020: my ($dom) = @_;
8021: my $name = 'trust';
8022: my ($trustconfig,$cached)=&Apache::lonnet::is_cached_new($name,$dom);
8023: unless (defined($cached)) {
8024: my %domconfig = &Apache::lonnet::get_dom('configuration',['trust'],$dom);
8025: &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'trust'},3600);
8026: $trustconfig = $domconfig{'trust'};
8027: }
8028: my %prohibited;
8029: if (ref($trustconfig)) {
8030: foreach my $prefix (keys(%{$trustconfig})) {
8031: if (ref($trustconfig->{$prefix}) eq 'HASH') {
8032: my $reject;
8033: if (ref($trustconfig->{$prefix}->{'exc'}) eq 'ARRAY') {
8034: if (grep(/^\Q$clientintdom\E$/,@{$trustconfig->{$prefix}->{'exc'}})) {
8035: $reject = 1;
8036: }
8037: }
8038: if (ref($trustconfig->{$prefix}->{'inc'}) eq 'ARRAY') {
8039: if (grep(/^\Q$clientintdom\E$/,@{$trustconfig->{$prefix}->{'inc'}})) {
8040: $reject = 0;
8041: } else {
8042: $reject = 1;
8043: }
8044: }
8045: if ($reject) {
8046: $prohibited{$prefix} = 1;
8047: }
8048: }
8049: }
8050: }
8051: return %prohibited;
8052: }
8053:
8054: sub distro_and_arch {
8055: return $dist.':'.$arch;
8056: }
8057:
8058: # ----------------------------------- POD (plain old documentation, CPAN style)
8059:
8060: =head1 NAME
8061:
8062: lond - "LON Daemon" Server (port "LOND" 5663)
8063:
8064: =head1 SYNOPSIS
8065:
8066: Usage: B<lond>
8067:
8068: Should only be run as user=www. This is a command-line script which
8069: is invoked by B<loncron>. There is no expectation that a typical user
8070: will manually start B<lond> from the command-line. (In other words,
8071: DO NOT START B<lond> YOURSELF.)
8072:
8073: =head1 DESCRIPTION
8074:
8075: There are two characteristics associated with the running of B<lond>,
8076: PROCESS MANAGEMENT (starting, stopping, handling child processes)
8077: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
8078: subscriptions, etc). These are described in two large
8079: sections below.
8080:
8081: B<PROCESS MANAGEMENT>
8082:
8083: Preforker - server who forks first. Runs as a daemon. HUPs.
8084: Uses IDEA encryption
8085:
8086: B<lond> forks off children processes that correspond to the other servers
8087: in the network. Management of these processes can be done at the
8088: parent process level or the child process level.
8089:
8090: B<logs/lond.log> is the location of log messages.
8091:
8092: The process management is now explained in terms of linux shell commands,
8093: subroutines internal to this code, and signal assignments:
8094:
8095: =over 4
8096:
8097: =item *
8098:
8099: PID is stored in B<logs/lond.pid>
8100:
8101: This is the process id number of the parent B<lond> process.
8102:
8103: =item *
8104:
8105: SIGTERM and SIGINT
8106:
8107: Parent signal assignment:
8108: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
8109:
8110: Child signal assignment:
8111: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
8112: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
8113: to restart a new child.)
8114:
8115: Command-line invocations:
8116: B<kill> B<-s> SIGTERM I<PID>
8117: B<kill> B<-s> SIGINT I<PID>
8118:
8119: Subroutine B<HUNTSMAN>:
8120: This is only invoked for the B<lond> parent I<PID>.
8121: This kills all the children, and then the parent.
8122: The B<lonc.pid> file is cleared.
8123:
8124: =item *
8125:
8126: SIGHUP
8127:
8128: Current bug:
8129: This signal can only be processed the first time
8130: on the parent process. Subsequent SIGHUP signals
8131: have no effect.
8132:
8133: Parent signal assignment:
8134: $SIG{HUP} = \&HUPSMAN;
8135:
8136: Child signal assignment:
8137: none (nothing happens)
8138:
8139: Command-line invocations:
8140: B<kill> B<-s> SIGHUP I<PID>
8141:
8142: Subroutine B<HUPSMAN>:
8143: This is only invoked for the B<lond> parent I<PID>,
8144: This kills all the children, and then the parent.
8145: The B<lond.pid> file is cleared.
8146:
8147: =item *
8148:
8149: SIGUSR1
8150:
8151: Parent signal assignment:
8152: $SIG{USR1} = \&USRMAN;
8153:
8154: Child signal assignment:
8155: $SIG{USR1}= \&logstatus;
8156:
8157: Command-line invocations:
8158: B<kill> B<-s> SIGUSR1 I<PID>
8159:
8160: Subroutine B<USRMAN>:
8161: When invoked for the B<lond> parent I<PID>,
8162: SIGUSR1 is sent to all the children, and the status of
8163: each connection is logged.
8164:
8165: =item *
8166:
8167: SIGUSR2
8168:
8169: Parent Signal assignment:
8170: $SIG{USR2} = \&UpdateHosts
8171:
8172: Child signal assignment:
8173: NONE
8174:
8175:
8176: =item *
8177:
8178: SIGCHLD
8179:
8180: Parent signal assignment:
8181: $SIG{CHLD} = \&REAPER;
8182:
8183: Child signal assignment:
8184: none
8185:
8186: Command-line invocations:
8187: B<kill> B<-s> SIGCHLD I<PID>
8188:
8189: Subroutine B<REAPER>:
8190: This is only invoked for the B<lond> parent I<PID>.
8191: Information pertaining to the child is removed.
8192: The socket port is cleaned up.
8193:
8194: =back
8195:
8196: B<SERVER-SIDE ACTIVITIES>
8197:
8198: Server-side information can be accepted in an encrypted or non-encrypted
8199: method.
8200:
8201: =over 4
8202:
8203: =item ping
8204:
8205: Query a client in the hosts.tab table; "Are you there?"
8206:
8207: =item pong
8208:
8209: Respond to a ping query.
8210:
8211: =item ekey
8212:
8213: Read in encrypted key, make cipher. Respond with a buildkey.
8214:
8215: =item load
8216:
8217: Respond with CPU load based on a computation upon /proc/loadavg.
8218:
8219: =item currentauth
8220:
8221: Reply with current authentication information (only over an
8222: encrypted channel).
8223:
8224: =item auth
8225:
8226: Only over an encrypted channel, reply as to whether a user's
8227: authentication information can be validated.
8228:
8229: =item passwd
8230:
8231: Allow for a password to be set.
8232:
8233: =item makeuser
8234:
8235: Make a user.
8236:
8237: =item changeuserauth
8238:
8239: Allow for authentication mechanism and password to be changed.
8240:
8241: =item home
8242:
8243: Respond to a question "are you the home for a given user?"
8244:
8245: =item update
8246:
8247: Update contents of a subscribed resource.
8248:
8249: =item unsubscribe
8250:
8251: The server is unsubscribing from a resource.
8252:
8253: =item subscribe
8254:
8255: The server is subscribing to a resource.
8256:
8257: =item log
8258:
8259: Place in B<logs/lond.log>
8260:
8261: =item put
8262:
8263: stores hash in namespace
8264:
8265: =item rolesput
8266:
8267: put a role into a user's environment
8268:
8269: =item get
8270:
8271: returns hash with keys from array
8272: reference filled in from namespace
8273:
8274: =item eget
8275:
8276: returns hash with keys from array
8277: reference filled in from namesp (encrypts the return communication)
8278:
8279: =item rolesget
8280:
8281: get a role from a user's environment
8282:
8283: =item del
8284:
8285: deletes keys out of array from namespace
8286:
8287: =item keys
8288:
8289: returns namespace keys
8290:
8291: =item dump
8292:
8293: dumps the complete (or key matching regexp) namespace into a hash
8294:
8295: =item store
8296:
8297: stores hash permanently
8298: for this url; hashref needs to be given and should be a \%hashname; the
8299: remaining args aren't required and if they aren't passed or are '' they will
8300: be derived from the ENV
8301:
8302: =item restore
8303:
8304: returns a hash for a given url
8305:
8306: =item querysend
8307:
8308: Tells client about the lonsql process that has been launched in response
8309: to a sent query.
8310:
8311: =item queryreply
8312:
8313: Accept information from lonsql and make appropriate storage in temporary
8314: file space.
8315:
8316: =item idput
8317:
8318: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
8319: for each student, defined perhaps by the institutional Registrar.)
8320:
8321: =item idget
8322:
8323: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
8324: for each student, defined perhaps by the institutional Registrar.)
8325:
8326: =item iddel
8327:
8328: Deletes one or more ids in a domain's id database.
8329:
8330: =item tmpput
8331:
8332: Accept and store information in temporary space.
8333:
8334: =item tmpget
8335:
8336: Send along temporarily stored information.
8337:
8338: =item ls
8339:
8340: List part of a user's directory.
8341:
8342: =item pushtable
8343:
8344: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
8345: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
8346: must be restored manually in case of a problem with the new table file.
8347: pushtable requires that the request be encrypted and validated via
8348: ValidateManager. The form of the command is:
8349: enc:pushtable tablename <tablecontents> \n
8350: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
8351: cleartext newline.
8352:
8353: =item Hanging up (exit or init)
8354:
8355: What to do when a client tells the server that they (the client)
8356: are leaving the network.
8357:
8358: =item unknown command
8359:
8360: If B<lond> is sent an unknown command (not in the list above),
8361: it replys to the client "unknown_cmd".
8362:
8363:
8364: =item UNKNOWN CLIENT
8365:
8366: If the anti-spoofing algorithm cannot verify the client,
8367: the client is rejected (with a "refused" message sent
8368: to the client, and the connection is closed.
8369:
8370: =back
8371:
8372: =head1 PREREQUISITES
8373:
8374: IO::Socket
8375: IO::File
8376: Apache::File
8377: POSIX
8378: Crypt::IDEA
8379: LWP::UserAgent()
8380: GDBM_File
8381: Authen::Krb4
8382: Authen::Krb5
8383:
8384: =head1 COREQUISITES
8385:
8386: none
8387:
8388: =head1 OSNAMES
8389:
8390: linux
8391:
8392: =head1 SCRIPT CATEGORIES
8393:
8394: Server/Process
8395:
8396: =cut
8397:
8398:
8399: =pod
8400:
8401: =head1 LOG MESSAGES
8402:
8403: The messages below can be emitted in the lond log. This log is located
8404: in ~httpd/perl/logs/lond.log Many log messages have HTML encapsulation
8405: to provide coloring if examined from inside a web page. Some do not.
8406: Where color is used, the colors are; Red for sometihhng to get excited
8407: about and to follow up on. Yellow for something to keep an eye on to
8408: be sure it does not get worse, Green,and Blue for informational items.
8409:
8410: In the discussions below, sometimes reference is made to ~httpd
8411: when describing file locations. There isn't really an httpd
8412: user, however there is an httpd directory that gets installed in the
8413: place that user home directories go. On linux, this is usually
8414: (always?) /home/httpd.
8415:
8416:
8417: Some messages are colorless. These are usually (not always)
8418: Green/Blue color level messages.
8419:
8420: =over 2
8421:
8422: =item (Red) LocalConnection rejecting non local: <ip> ne 127.0.0.1
8423:
8424: A local connection negotiation was attempted by
8425: a host whose IP address was not 127.0.0.1.
8426: The socket is closed and the child will exit.
8427: lond has three ways to establish an encyrption
8428: key with a client:
8429:
8430: =over 2
8431:
8432: =item local
8433:
8434: The key is written and read from a file.
8435: This is only valid for connections from localhost.
8436:
8437: =item insecure
8438:
8439: The key is generated by the server and
8440: transmitted to the client.
8441:
8442: =item ssl (secure)
8443:
8444: An ssl connection is negotiated with the client,
8445: the key is generated by the server and sent to the
8446: client across this ssl connection before the
8447: ssl connectionis terminated and clear text
8448: transmission resumes.
8449:
8450: =back
8451:
8452: =item (Red) LocalConnection: caller is insane! init = <init> and type = <type>
8453:
8454: The client is local but has not sent an initialization
8455: string that is the literal "init:local" The connection
8456: is closed and the child exits.
8457:
8458: =item Red CRITICAL Can't get key file <error>
8459:
8460: SSL key negotiation is being attempted but the call to
8461: lonssl::KeyFile failed. This usually means that the
8462: configuration file is not correctly defining or protecting
8463: the directories/files lonCertificateDirectory or
8464: lonnetPrivateKey
8465: <error> is a string that describes the reason that
8466: the key file could not be located.
8467:
8468: =item (Red) CRITICAL Can't get certificates <error>
8469:
8470: SSL key negotiation failed because we were not able to retrives our certificate
8471: or the CA's certificate in the call to lonssl::CertificateFile
8472: <error> is the textual reason this failed. Usual reasons:
8473:
8474: =over 2
8475:
8476: =item Apache config file for loncapa incorrect:
8477:
8478: one of the variables
8479: lonCertificateDirectory, lonnetCertificateAuthority, or lonnetCertificate
8480: undefined or incorrect
8481:
8482: =item Permission error:
8483:
8484: The directory pointed to by lonCertificateDirectory is not readable by lond
8485:
8486: =item Permission error:
8487:
8488: Files in the directory pointed to by lonCertificateDirectory are not readable by lond.
8489:
8490: =item Installation error:
8491:
8492: Either the certificate authority file or the certificate have not
8493: been installed in lonCertificateDirectory.
8494:
8495: =item (Red) CRITICAL SSL Socket promotion failed: <err>
8496:
8497: The promotion of the connection from plaintext to SSL failed
8498: <err> is the reason for the failure. There are two
8499: system calls involved in the promotion (one of which failed),
8500: a dup to produce
8501: a second fd on the raw socket over which the encrypted data
8502: will flow and IO::SOcket::SSL->new_from_fd which creates
8503: the SSL connection on the duped fd.
8504:
8505: =item (Blue) WARNING client did not respond to challenge
8506:
8507: This occurs on an insecure (non SSL) connection negotiation request.
8508: lond generates some number from the time, the PID and sends it to
8509: the client. The client must respond by echoing this information back.
8510: If the client does not do so, that's a violation of the challenge
8511: protocols and the connection will be failed.
8512:
8513: =item (Red) No manager table. Nobody can manage!!
8514:
8515: lond has the concept of privileged hosts that
8516: can perform remote management function such
8517: as update the hosts.tab. The manager hosts
8518: are described in the
8519: ~httpd/lonTabs/managers.tab file.
8520: this message is logged if this file is missing.
8521:
8522:
8523: =item (Green) Registering manager <dnsname> as <cluster_name> with <ipaddress>
8524:
8525: Reports the successful parse and registration
8526: of a specific manager.
8527:
8528: =item Green existing host <clustername:dnsname>
8529:
8530: The manager host is already defined in the hosts.tab
8531: the information in that table, rather than the info in the
8532: manager table will be used to determine the manager's ip.
8533:
8534: =item (Red) Unable to craete <filename>
8535:
8536: lond has been asked to create new versions of an administrative
8537: file (by a manager). When this is done, the new file is created
8538: in a temp file and then renamed into place so that there are always
8539: usable administrative files, even if the update fails. This failure
8540: message means that the temp file could not be created.
8541: The update is abandoned, and the old file is available for use.
8542:
8543: =item (Green) CopyFile from <oldname> to <newname> failed
8544:
8545: In an update of administrative files, the copy of the existing file to a
8546: backup file failed. The installation of the new file may still succeed,
8547: but there will not be a back up file to rever to (this should probably
8548: be yellow).
8549:
8550: =item (Green) Pushfile: backed up <oldname> to <newname>
8551:
8552: See above, the backup of the old administrative file succeeded.
8553:
8554: =item (Red) Pushfile: Unable to install <filename> <reason>
8555:
8556: The new administrative file could not be installed. In this case,
8557: the old administrative file is still in use.
8558:
8559: =item (Green) Installed new < filename>.
8560:
8561: The new administrative file was successfullly installed.
8562:
8563: =item (Red) Reinitializing lond pid=<pid>
8564:
8565: The lonc child process <pid> will be sent a USR2
8566: signal.
8567:
8568: =item (Red) Reinitializing self
8569:
8570: We've been asked to re-read our administrative files,and
8571: are doing so.
8572:
8573: =item (Yellow) error:Invalid process identifier <ident>
8574:
8575: A reinit command was received, but the target part of the
8576: command was not valid. It must be either
8577: 'lond' or 'lonc' but was <ident>
8578:
8579: =item (Green) isValideditCommand checking: Command = <command> Key = <key> newline = <newline>
8580:
8581: Checking to see if lond has been handed a valid edit
8582: command. It is possible the edit command is not valid
8583: in that case there are no log messages to indicate that.
8584:
8585: =item Result of password change for <username> pwchange_success
8586:
8587: The password for <username> was
8588: successfully changed.
8589:
8590: =item Unable to open <user> passwd to change password
8591:
8592: Could not rewrite the
8593: internal password file for a user
8594:
8595: =item Result of password change for <user> : <result>
8596:
8597: A unix password change for <user> was attempted
8598: and the pipe returned <result>
8599:
8600: =item LWP GET: <message> for <fname> (<remoteurl>)
8601:
8602: The lightweight process fetch for a resource failed
8603: with <message> the local filename that should
8604: have existed/been created was <fname> the
8605: corresponding URI: <remoteurl> This is emitted in several
8606: places.
8607:
8608: =item Unable to move <transname> to <destname>
8609:
8610: From fetch_user_file_handler - the user file was replicated but could not
8611: be mv'd to its final location.
8612:
8613: =item Looking for <domain> <username>
8614:
8615: From user_has_session_handler - This should be a Debug call instead
8616: it indicates lond is about to check whether the specified user has a
8617: session active on the specified domain on the local host.
8618:
8619: =item Client <ip> (<name>) hanging up: <input>
8620:
8621: lond has been asked to exit by its client. The <ip> and <name> identify the
8622: client systemand <input> is the full exit command sent to the server.
8623:
8624: =item Red CRITICAL: ABNORMAL EXIT. child <pid> for server <hostname> died through a crass with this error->[<message>].
8625:
8626: A lond child terminated. NOte that this termination can also occur when the
8627: child receives the QUIT or DIE signals. <pid> is the process id of the child,
8628: <hostname> the host lond is working for, and <message> the reason the child died
8629: to the best of our ability to get it (I would guess that any numeric value
8630: represents and errno value). This is immediately followed by
8631:
8632: =item Famous last words: Catching exception - <log>
8633:
8634: Where log is some recent information about the state of the child.
8635:
8636: =item Red CRITICAL: TIME OUT <pid>
8637:
8638: Some timeout occured for server <pid>. THis is normally a timeout on an LWP
8639: doing an HTTP::GET.
8640:
8641: =item child <pid> died
8642:
8643: The reaper caught a SIGCHILD for the lond child process <pid>
8644: This should be modified to also display the IP of the dying child
8645: $children{$pid}
8646:
8647: =item Unknown child 0 died
8648: A child died but the wait for it returned a pid of zero which really should not
8649: ever happen.
8650:
8651: =item Child <which> - <pid> looks like we missed it's death
8652:
8653: When a sigchild is received, the reaper process checks all children to see if they are
8654: alive. If children are dying quite quickly, the lack of signal queuing can mean
8655: that a signal hearalds the death of more than one child. If so this message indicates
8656: which other one died. <which> is the ip of a dead child
8657:
8658: =item Free socket: <shutdownretval>
8659:
8660: The HUNTSMAN sub was called due to a SIGINT in a child process. The socket is being shutdown.
8661: for whatever reason, <shutdownretval> is printed but in fact shutdown() is not documented
8662: to return anything. This is followed by:
8663:
8664: =item Red CRITICAL: Shutting down
8665:
8666: Just prior to exit.
8667:
8668: =item Free socket: <shutdownretval>
8669:
8670: The HUPSMAN sub was called due to a SIGHUP. all children get killsed, and lond execs itself.
8671: This is followed by:
8672:
8673: =item (Red) CRITICAL: Restarting
8674:
8675: lond is about to exec itself to restart.
8676:
8677: =item (Blue) Updating connections
8678:
8679: (In response to a USR2). All the children (except the one for localhost)
8680: are about to be killed, the hosts tab reread, and Apache reloaded via apachereload.
8681:
8682: =item (Blue) UpdateHosts killing child <pid> for ip <ip>
8683:
8684: Due to USR2 as above.
8685:
8686: =item (Green) keeping child for ip <ip> (pid = <pid>)
8687:
8688: In response to USR2 as above, the child indicated is not being restarted because
8689: it's assumed that we'll always need a child for the localhost.
8690:
8691:
8692: =item Going to check on the children
8693:
8694: Parent is about to check on the health of the child processes.
8695: Note that this is in response to a USR1 sent to the parent lond.
8696: there may be one or more of the next two messages:
8697:
8698: =item <pid> is dead
8699:
8700: A child that we have in our child hash as alive has evidently died.
8701:
8702: =item Child <pid> did not respond
8703:
8704: In the health check the child <pid> did not update/produce a pid_.txt
8705: file when sent it's USR1 signal. That process is killed with a 9 signal, as it's
8706: assumed to be hung in some un-fixable way.
8707:
8708: =item Finished checking children
8709:
8710: Master processs's USR1 processing is cojmplete.
8711:
8712: =item (Red) CRITICAL: ------- Starting ------
8713:
8714: (There are more '-'s on either side). Lond has forked itself off to
8715: form a new session and is about to start actual initialization.
8716:
8717: =item (Green) Attempting to start child (<client>)
8718:
8719: Started a new child process for <client>. Client is IO::Socket object
8720: connected to the child. This was as a result of a TCP/IP connection from a client.
8721:
8722: =item Unable to determine who caller was, getpeername returned nothing
8723:
8724: In child process initialization. either getpeername returned undef or
8725: a zero sized object was returned. Processing continues, but in my opinion,
8726: this should be cause for the child to exit.
8727:
8728: =item Unable to determine clientip
8729:
8730: In child process initialization. The peer address from getpeername was not defined.
8731: The client address is stored as "Unavailable" and processing continues.
8732:
8733: =item (Yellow) INFO: Connection <ip> <name> connection type = <type>
8734:
8735: In child initialization. A good connectionw as received from <ip>.
8736:
8737: =over 2
8738:
8739: =item <name>
8740:
8741: is the name of the client from hosts.tab.
8742:
8743: =item <type>
8744:
8745: Is the connection type which is either
8746:
8747: =over 2
8748:
8749: =item manager
8750:
8751: The connection is from a manager node, not in hosts.tab
8752:
8753: =item client
8754:
8755: the connection is from a non-manager in the hosts.tab
8756:
8757: =item both
8758:
8759: The connection is from a manager in the hosts.tab.
8760:
8761: =back
8762:
8763: =back
8764:
8765: =item (Blue) Certificates not installed -- trying insecure auth
8766:
8767: One of the certificate file, key file or
8768: certificate authority file could not be found for a client attempting
8769: SSL connection intiation. COnnection will be attemptied in in-secure mode.
8770: (this would be a system with an up to date lond that has not gotten a
8771: certificate from us).
8772:
8773: =item (Green) Successful local authentication
8774:
8775: A local connection successfully negotiated the encryption key.
8776: In this case the IDEA key is in a file (that is hopefully well protected).
8777:
8778: =item (Green) Successful ssl authentication with <client>
8779:
8780: The client (<client> is the peer's name in hosts.tab), has successfully
8781: negotiated an SSL connection with this child process.
8782:
8783: =item (Green) Successful insecure authentication with <client>
8784:
8785:
8786: The client has successfully negotiated an insecure connection withthe child process.
8787:
8788: =item (Yellow) Attempted insecure connection disallowed
8789:
8790: The client attempted and failed to successfully negotiate a successful insecure
8791: connection. This can happen either because the variable londAllowInsecure is false
8792: or undefined, or becuse the child did not successfully echo back the challenge
8793: string.
8794:
8795:
8796: =back
8797:
8798: =back
8799:
8800:
8801: =cut
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to lond CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom