1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.531 2017/02/07 18:14:13 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: 1.531 $'; #' 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: servercerts => {institutiononly => 1},
271: serverdistarch => {anywhere => 1},
272: serverhomeID => {anywhere => 1},
273: serverloncaparev => {anywhere => 1},
274: servertimezone => {remote => 1, enroll => 1},
275: setannounce => {remote => 1, domroles => 1},
276: sethost => {anywhere => 1},
277: store => {remote => 1, enroll => 1, reqcrs => 1,},
278: studentphoto => {remote => 1, enroll => 1},
279: sub => {content => 1,},
280: tmpdel => {anywhere => 1},
281: tmpget => {anywhere => 1},
282: tmpput => {anywhere => 1},
283: tokenauthuserfile => {anywhere => 1},
284: unsub => {content => 1,},
285: update => {shared => 1},
286: updateclickers => {remote => 1},
287: userhassession => {anywhere => 1},
288: userload => {anywhere => 1},
289: version => {anywhere => 1}, #not used
290: );
291:
292: #
293: # Statistics that are maintained and dislayed in the status line.
294: #
295: my $Transactions = 0; # Number of attempted transactions.
296: my $Failures = 0; # Number of transcations failed.
297:
298: # ResetStatistics:
299: # Resets the statistics counters:
300: #
301: sub ResetStatistics {
302: $Transactions = 0;
303: $Failures = 0;
304: }
305:
306: #------------------------------------------------------------------------
307: #
308: # LocalConnection
309: # Completes the formation of a locally authenticated connection.
310: # This function will ensure that the 'remote' client is really the
311: # local host. If not, the connection is closed, and the function fails.
312: # If so, initcmd is parsed for the name of a file containing the
313: # IDEA session key. The fie is opened, read, deleted and the session
314: # key returned to the caller.
315: #
316: # Parameters:
317: # $Socket - Socket open on client.
318: # $initcmd - The full text of the init command.
319: #
320: # Returns:
321: # IDEA session key on success.
322: # undef on failure.
323: #
324: sub LocalConnection {
325: my ($Socket, $initcmd) = @_;
326: Debug("Attempting local connection: $initcmd client: $clientip");
327: if($clientip ne "127.0.0.1") {
328: &logthis('<font color="red"> LocalConnection rejecting non local: '
329: ."$clientip ne 127.0.0.1 </font>");
330: close $Socket;
331: return undef;
332: } else {
333: chomp($initcmd); # Get rid of \n in filename.
334: my ($init, $type, $name) = split(/:/, $initcmd);
335: Debug(" Init command: $init $type $name ");
336:
337: # Require that $init = init, and $type = local: Otherwise
338: # the caller is insane:
339:
340: if(($init ne "init") && ($type ne "local")) {
341: &logthis('<font color = "red"> LocalConnection: caller is insane! '
342: ."init = $init, and type = $type </font>");
343: close($Socket);;
344: return undef;
345:
346: }
347: # Now get the key filename:
348:
349: my $IDEAKey = lonlocal::ReadKeyFile($name);
350: return $IDEAKey;
351: }
352: }
353: #------------------------------------------------------------------------------
354: #
355: # SSLConnection
356: # Completes the formation of an ssh authenticated connection. The
357: # socket is promoted to an ssl socket. If this promotion and the associated
358: # certificate exchange are successful, the IDEA key is generated and sent
359: # to the remote peer via the SSL tunnel. The IDEA key is also returned to
360: # the caller after the SSL tunnel is torn down.
361: #
362: # Parameters:
363: # Name Type Purpose
364: # $Socket IO::Socket::INET Plaintext socket.
365: #
366: # Returns:
367: # IDEA key on success.
368: # undef on failure.
369: #
370: sub SSLConnection {
371: my $Socket = shift;
372:
373: Debug("SSLConnection: ");
374: my $KeyFile = lonssl::KeyFile();
375: if(!$KeyFile) {
376: my $err = lonssl::LastError();
377: &logthis("<font color=\"red\"> CRITICAL"
378: ."Can't get key file $err </font>");
379: return undef;
380: }
381: my ($CACertificate,
382: $Certificate) = lonssl::CertificateFile();
383:
384:
385: # If any of the key, certificate or certificate authority
386: # certificate filenames are not defined, this can't work.
387:
388: if((!$Certificate) || (!$CACertificate)) {
389: my $err = lonssl::LastError();
390: &logthis("<font color=\"red\"> CRITICAL"
391: ."Can't get certificates: $err </font>");
392:
393: return undef;
394: }
395: Debug("Key: $KeyFile CA: $CACertificate Cert: $Certificate");
396:
397: # Indicate to our peer that we can procede with
398: # a transition to ssl authentication:
399:
400: print $Socket "ok:ssl\n";
401:
402: Debug("Approving promotion -> ssl");
403: # And do so:
404:
405: my $SSLSocket = lonssl::PromoteServerSocket($Socket,
406: $CACertificate,
407: $Certificate,
408: $KeyFile);
409: if(! ($SSLSocket) ) { # SSL socket promotion failed.
410: my $err = lonssl::LastError();
411: &logthis("<font color=\"red\"> CRITICAL "
412: ."SSL Socket promotion failed: $err </font>");
413: return undef;
414: }
415: Debug("SSL Promotion successful");
416:
417: #
418: # The only thing we'll use the socket for is to send the IDEA key
419: # to the peer:
420:
421: my $Key = lonlocal::CreateCipherKey();
422: print $SSLSocket "$Key\n";
423:
424: lonssl::Close($SSLSocket);
425:
426: Debug("Key exchange complete: $Key");
427:
428: return $Key;
429: }
430: #
431: # InsecureConnection:
432: # If insecure connections are allowd,
433: # exchange a challenge with the client to 'validate' the
434: # client (not really, but that's the protocol):
435: # We produce a challenge string that's sent to the client.
436: # The client must then echo the challenge verbatim to us.
437: #
438: # Parameter:
439: # Socket - Socket open on the client.
440: # Returns:
441: # 1 - success.
442: # 0 - failure (e.g.mismatch or insecure not allowed).
443: #
444: sub InsecureConnection {
445: my $Socket = shift;
446:
447: # Don't even start if insecure connections are not allowed.
448:
449: if(! $perlvar{londAllowInsecure}) { # Insecure connections not allowed.
450: return 0;
451: }
452:
453: # Fabricate a challenge string and send it..
454:
455: my $challenge = "$$".time; # pid + time.
456: print $Socket "$challenge\n";
457: &status("Waiting for challenge reply");
458:
459: my $answer = <$Socket>;
460: $answer =~s/\W//g;
461: if($challenge eq $answer) {
462: return 1;
463: } else {
464: logthis("<font color='blue'>WARNING client did not respond to challenge</font>");
465: &status("No challenge reqply");
466: return 0;
467: }
468:
469:
470: }
471: #
472: # Safely execute a command (as long as it's not a shel command and doesn
473: # not require/rely on shell escapes. The function operates by doing a
474: # a pipe based fork and capturing stdout and stderr from the pipe.
475: #
476: # Formal Parameters:
477: # $line - A line of text to be executed as a command.
478: # Returns:
479: # The output from that command. If the output is multiline the caller
480: # must know how to split up the output.
481: #
482: #
483: sub execute_command {
484: my ($line) = @_;
485: my @words = split(/\s/, $line); # Bust the command up into words.
486: my $output = "";
487:
488: my $pid = open(CHILD, "-|");
489:
490: if($pid) { # Parent process
491: Debug("In parent process for execute_command");
492: my @data = <CHILD>; # Read the child's outupt...
493: close CHILD;
494: foreach my $output_line (@data) {
495: Debug("Adding $output_line");
496: $output .= $output_line; # Presumably has a \n on it.
497: }
498:
499: } else { # Child process
500: close (STDERR);
501: open (STDERR, ">&STDOUT");# Combine stderr, and stdout...
502: exec(@words); # won't return.
503: }
504: return $output;
505: }
506:
507:
508: # GetCertificate: Given a transaction that requires a certificate,
509: # this function will extract the certificate from the transaction
510: # request. Note that at this point, the only concept of a certificate
511: # is the hostname to which we are connected.
512: #
513: # Parameter:
514: # request - The request sent by our client (this parameterization may
515: # need to change when we really use a certificate granting
516: # authority.
517: #
518: sub GetCertificate {
519: my $request = shift;
520:
521: return $clientip;
522: }
523:
524: #
525: # Return true if client is a manager.
526: #
527: sub isManager {
528: return (($ConnectionType eq "manager") || ($ConnectionType eq "both"));
529: }
530: #
531: # Return tru if client can do client functions
532: #
533: sub isClient {
534: return (($ConnectionType eq "client") || ($ConnectionType eq "both"));
535: }
536:
537:
538: #
539: # ReadManagerTable: Reads in the current manager table. For now this is
540: # done on each manager authentication because:
541: # - These authentications are not frequent
542: # - This allows dynamic changes to the manager table
543: # without the need to signal to the lond.
544: #
545: sub ReadManagerTable {
546:
547: &Debug("Reading manager table");
548: # Clean out the old table first..
549:
550: foreach my $key (keys %managers) {
551: delete $managers{$key};
552: }
553:
554: my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
555: if (!open (MANAGERS, $tablename)) {
556: my $hostname = &Apache::lonnet::hostname($perlvar{'lonHostID'});
557: if (&Apache::lonnet::is_LC_dns($hostname)) {
558: &logthis('<font color="red">No manager table. Nobody can manage!!</font>');
559: }
560: return;
561: }
562: while(my $host = <MANAGERS>) {
563: chomp($host);
564: if ($host =~ "^#") { # Comment line.
565: next;
566: }
567: if (!defined &Apache::lonnet::get_host_ip($host)) { # This is a non cluster member
568: # The entry is of the form:
569: # cluname:hostname
570: # cluname - A 'cluster hostname' is needed in order to negotiate
571: # the host key.
572: # hostname- The dns name of the host.
573: #
574: my($cluname, $dnsname) = split(/:/, $host);
575:
576: my $ip = gethostbyname($dnsname);
577: if(defined($ip)) { # bad names don't deserve entry.
578: my $hostip = inet_ntoa($ip);
579: $managers{$hostip} = $cluname;
580: logthis('<font color="green"> registering manager '.
581: "$dnsname as $cluname with $hostip </font>\n");
582: }
583: } else {
584: logthis('<font color="green"> existing host'." $host</font>\n");
585: $managers{&Apache::lonnet::get_host_ip($host)} = $host; # Use info from cluster tab if cluster memeber
586: }
587: }
588: }
589:
590: #
591: # ValidManager: Determines if a given certificate represents a valid manager.
592: # in this primitive implementation, the 'certificate' is
593: # just the connecting loncapa client name. This is checked
594: # against a valid client list in the configuration.
595: #
596: #
597: sub ValidManager {
598: my $certificate = shift;
599:
600: return isManager;
601: }
602: #
603: # CopyFile: Called as part of the process of installing a
604: # new configuration file. This function copies an existing
605: # file to a backup file.
606: # Parameters:
607: # oldfile - Name of the file to backup.
608: # newfile - Name of the backup file.
609: # Return:
610: # 0 - Failure (errno has failure reason).
611: # 1 - Success.
612: #
613: sub CopyFile {
614:
615: my ($oldfile, $newfile) = @_;
616:
617: if (! copy($oldfile,$newfile)) {
618: return 0;
619: }
620: chmod(0660, $newfile);
621: return 1;
622: }
623: #
624: # Host files are passed out with externally visible host IPs.
625: # If, for example, we are behind a fire-wall or NAT host, our
626: # internally visible IP may be different than the externally
627: # visible IP. Therefore, we always adjust the contents of the
628: # host file so that the entry for ME is the IP that we believe
629: # we have. At present, this is defined as the entry that
630: # DNS has for us. If by some chance we are not able to get a
631: # DNS translation for us, then we assume that the host.tab file
632: # is correct.
633: # BUGBUGBUG - in the future, we really should see if we can
634: # easily query the interface(s) instead.
635: # Parameter(s):
636: # contents - The contents of the host.tab to check.
637: # Returns:
638: # newcontents - The adjusted contents.
639: #
640: #
641: sub AdjustHostContents {
642: my $contents = shift;
643: my $adjusted;
644: my $me = $perlvar{'lonHostID'};
645:
646: foreach my $line (split(/\n/,$contents)) {
647: if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/) ||
648: ($line =~ /^\s*\^/))) {
649: chomp($line);
650: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
651: if ($id eq $me) {
652: my $ip = gethostbyname($name);
653: my $ipnew = inet_ntoa($ip);
654: $ip = $ipnew;
655: # Reconstruct the host line and append to adjusted:
656:
657: my $newline = "$id:$domain:$role:$name:$ip";
658: if($maxcon ne "") { # Not all hosts have loncnew tuning params
659: $newline .= ":$maxcon:$idleto:$mincon";
660: }
661: $adjusted .= $newline."\n";
662:
663: } else { # Not me, pass unmodified.
664: $adjusted .= $line."\n";
665: }
666: } else { # Blank or comment never re-written.
667: $adjusted .= $line."\n"; # Pass blanks and comments as is.
668: }
669: }
670: return $adjusted;
671: }
672: #
673: # InstallFile: Called to install an administrative file:
674: # - The file is created int a temp directory called <name>.tmp
675: # - lcinstall file is called to install the file.
676: # since the web app has no direct write access to the table directory
677: #
678: # Parameters:
679: # Name of the file
680: # File Contents.
681: # Return:
682: # nonzero - success.
683: # 0 - failure and $! has an errno.
684: # Assumptions:
685: # File installtion is a relatively infrequent
686: #
687: sub InstallFile {
688:
689: my ($Filename, $Contents) = @_;
690: # my $TempFile = $Filename.".tmp";
691: my $exedir = $perlvar{'lonDaemons'};
692: my $tmpdir = $exedir.'/tmp/';
693: my $TempFile = $tmpdir."TempTableFile.tmp";
694:
695: # Open the file for write:
696:
697: my $fh = IO::File->new("> $TempFile"); # Write to temp.
698: if(!(defined $fh)) {
699: &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
700: return 0;
701: }
702: # write the contents of the file:
703:
704: print $fh ($Contents);
705: $fh->close; # In case we ever have a filesystem w. locking
706:
707: chmod(0664, $TempFile); # Everyone can write it.
708:
709: # Use lcinstall file to put the file in the table directory...
710:
711: &Debug("Opening pipe to $exedir/lcinstallfile $TempFile $Filename");
712: my $pf = IO::File->new("| $exedir/lcinstallfile $TempFile $Filename > $exedir/logs/lcinstallfile.log");
713: close $pf;
714: my $err = $?;
715: &Debug("Status is $err");
716: if ($err != 0) {
717: my $msg = $err;
718: if ($err < @installerrors) {
719: $msg = $installerrors[$err];
720: }
721: &logthis("Install failed for table file $Filename : $msg");
722: return 0;
723: }
724:
725: # Remove the temp file:
726:
727: unlink($TempFile);
728:
729: return 1;
730: }
731:
732:
733: #
734: # ConfigFileFromSelector: converts a configuration file selector
735: # into a configuration file pathname.
736: # Supports the following file selectors:
737: # hosts, domain, dns_hosts, dns_domain
738: #
739: #
740: # Parameters:
741: # selector - Configuration file selector.
742: # Returns:
743: # Full path to the file or undef if the selector is invalid.
744: #
745: sub ConfigFileFromSelector {
746: my $selector = shift;
747: my $tablefile;
748:
749: my $tabledir = $perlvar{'lonTabDir'}.'/';
750: if (($selector eq "hosts") || ($selector eq "domain") ||
751: ($selector eq "dns_hosts") || ($selector eq "dns_domain")) {
752: $tablefile = $tabledir.$selector.'.tab';
753: }
754: return $tablefile;
755: }
756: #
757: # PushFile: Called to do an administrative push of a file.
758: # - Ensure the file being pushed is one we support.
759: # - Backup the old file to <filename.saved>
760: # - Separate the contents of the new file out from the
761: # rest of the request.
762: # - Write the new file.
763: # Parameter:
764: # Request - The entire user request. This consists of a : separated
765: # string pushfile:tablename:contents.
766: # NOTE: The contents may have :'s in it as well making things a bit
767: # more interesting... but not much.
768: # Returns:
769: # String to send to client ("ok" or "refused" if bad file).
770: #
771: sub PushFile {
772: my $request = shift;
773: my ($command, $filename, $contents) = split(":", $request, 3);
774: &Debug("PushFile");
775:
776: # At this point in time, pushes for only the following tables are
777: # supported:
778: # hosts.tab ($filename eq host).
779: # domain.tab ($filename eq domain).
780: # dns_hosts.tab ($filename eq dns_host).
781: # dns_domain.tab ($filename eq dns_domain).
782: # Construct the destination filename or reject the request.
783: #
784: # lonManage is supposed to ensure this, however this session could be
785: # part of some elaborate spoof that managed somehow to authenticate.
786: #
787:
788:
789: my $tablefile = ConfigFileFromSelector($filename);
790: if(! (defined $tablefile)) {
791: return "refused";
792: }
793:
794: # If the file being pushed is the host file, we adjust the entry for ourself so that the
795: # IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible
796: # to conceive of conditions where we don't have a DNS entry locally. This is possible in a
797: # network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
798: # that possibilty.
799:
800: if($filename eq "host") {
801: $contents = AdjustHostContents($contents);
802: } elsif ($filename eq 'dns_host' || $filename eq 'dns_domain') {
803: if ($contents eq '') {
804: &logthis('<font color="red"> Pushfile: unable to install '
805: .$tablefile." - no data received from push. </font>");
806: return 'error: push had no data';
807: }
808: if (&Apache::lonnet::get_host_ip($clientname)) {
809: my $clienthost = &Apache::lonnet::hostname($clientname);
810: if ($managers{$clientip} eq $clientname) {
811: my $clientprotocol = $Apache::lonnet::protocol{$clientname};
812: $clientprotocol = 'http' if ($clientprotocol ne 'https');
813: my $url = '/adm/'.$filename;
814: $url =~ s{_}{/};
815: my $request=new HTTP::Request('GET',"$clientprotocol://$clienthost$url");
816: my $response = LONCAPA::LWPReq::makerequest($clientname,$request,'',\%perlvar,60,0);
817: if ($response->is_error()) {
818: &logthis('<font color="red"> Pushfile: unable to install '
819: .$tablefile." - error attempting to pull data. </font>");
820: return 'error: pull failed';
821: } else {
822: my $result = $response->content;
823: chomp($result);
824: unless ($result eq $contents) {
825: &logthis('<font color="red"> Pushfile: unable to install '
826: .$tablefile." - pushed data and pulled data differ. </font>");
827: my $pushleng = length($contents);
828: my $pullleng = length($result);
829: if ($pushleng != $pullleng) {
830: return "error: $pushleng vs $pullleng bytes";
831: } else {
832: return "error: mismatch push and pull";
833: }
834: }
835: }
836: }
837: }
838: }
839:
840: # Install the new file:
841:
842: &logthis("Installing new $tablefile contents:\n$contents");
843: if(!InstallFile($tablefile, $contents)) {
844: &logthis('<font color="red"> Pushfile: unable to install '
845: .$tablefile." $! </font>");
846: return "error:$!";
847: } else {
848: &logthis('<font color="green"> Installed new '.$tablefile
849: ." - transaction by: $clientname ($clientip)</font>");
850: my $adminmail = $perlvar{'lonAdmEMail'};
851: my $admindom = &Apache::lonnet::host_domain($perlvar{'lonHostID'});
852: if ($admindom ne '') {
853: my %domconfig =
854: &Apache::lonnet::get_dom('configuration',['contacts'],$admindom);
855: if (ref($domconfig{'contacts'}) eq 'HASH') {
856: if ($domconfig{'contacts'}{'adminemail'} ne '') {
857: $adminmail = $domconfig{'contacts'}{'adminemail'};
858: }
859: }
860: }
861: if ($adminmail =~ /^[^\@]+\@[^\@]+$/) {
862: my $msg = new Mail::Send;
863: $msg->to($adminmail);
864: $msg->subject('LON-CAPA DNS update on '.$perlvar{'lonHostID'});
865: $msg->add('Content-type','text/plain; charset=UTF-8');
866: if (my $fh = $msg->open()) {
867: print $fh 'Update to '.$tablefile.' from Cluster Manager '.
868: "$clientname ($clientip)\n";
869: $fh->close;
870: }
871: }
872: }
873:
874: # Indicate success:
875:
876: return "ok";
877:
878: }
879:
880: #
881: # Called to re-init either lonc or lond.
882: #
883: # Parameters:
884: # request - The full request by the client. This is of the form
885: # reinit:<process>
886: # where <process> is allowed to be either of
887: # lonc or lond
888: #
889: # Returns:
890: # The string to be sent back to the client either:
891: # ok - Everything worked just fine.
892: # error:why - There was a failure and why describes the reason.
893: #
894: #
895: sub ReinitProcess {
896: my $request = shift;
897:
898:
899: # separate the request (reinit) from the process identifier and
900: # validate it producing the name of the .pid file for the process.
901: #
902: #
903: my ($junk, $process) = split(":", $request);
904: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
905: if($process eq 'lonc') {
906: $processpidfile = $processpidfile."lonc.pid";
907: if (!open(PIDFILE, "< $processpidfile")) {
908: return "error:Open failed for $processpidfile";
909: }
910: my $loncpid = <PIDFILE>;
911: close(PIDFILE);
912: logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
913: ."</font>");
914: kill("USR2", $loncpid);
915: } elsif ($process eq 'lond') {
916: logthis('<font color="red"> Reinitializing self (lond) </font>');
917: &UpdateHosts; # Lond is us!!
918: } else {
919: &logthis('<font color="yellow" Invalid reinit request for '.$process
920: ."</font>");
921: return "error:Invalid process identifier $process";
922: }
923: return 'ok';
924: }
925: # Validate a line in a configuration file edit script:
926: # Validation includes:
927: # - Ensuring the command is valid.
928: # - Ensuring the command has sufficient parameters
929: # Parameters:
930: # scriptline - A line to validate (\n has been stripped for what it's worth).
931: #
932: # Return:
933: # 0 - Invalid scriptline.
934: # 1 - Valid scriptline
935: # NOTE:
936: # Only the command syntax is checked, not the executability of the
937: # command.
938: #
939: sub isValidEditCommand {
940: my $scriptline = shift;
941:
942: # Line elements are pipe separated:
943:
944: my ($command, $key, $newline) = split(/\|/, $scriptline);
945: &logthis('<font color="green"> isValideditCommand checking: '.
946: "Command = '$command', Key = '$key', Newline = '$newline' </font>\n");
947:
948: if ($command eq "delete") {
949: #
950: # key with no newline.
951: #
952: if( ($key eq "") || ($newline ne "")) {
953: return 0; # Must have key but no newline.
954: } else {
955: return 1; # Valid syntax.
956: }
957: } elsif ($command eq "replace") {
958: #
959: # key and newline:
960: #
961: if (($key eq "") || ($newline eq "")) {
962: return 0;
963: } else {
964: return 1;
965: }
966: } elsif ($command eq "append") {
967: if (($key ne "") && ($newline eq "")) {
968: return 1;
969: } else {
970: return 0;
971: }
972: } else {
973: return 0; # Invalid command.
974: }
975: return 0; # Should not get here!!!
976: }
977: #
978: # ApplyEdit - Applies an edit command to a line in a configuration
979: # file. It is the caller's responsiblity to validate the
980: # edit line.
981: # Parameters:
982: # $directive - A single edit directive to apply.
983: # Edit directives are of the form:
984: # append|newline - Appends a new line to the file.
985: # replace|key|newline - Replaces the line with key value 'key'
986: # delete|key - Deletes the line with key value 'key'.
987: # $editor - A config file editor object that contains the
988: # file being edited.
989: #
990: sub ApplyEdit {
991:
992: my ($directive, $editor) = @_;
993:
994: # Break the directive down into its command and its parameters
995: # (at most two at this point. The meaning of the parameters, if in fact
996: # they exist depends on the command).
997:
998: my ($command, $p1, $p2) = split(/\|/, $directive);
999:
1000: if($command eq "append") {
1001: $editor->Append($p1); # p1 - key p2 null.
1002: } elsif ($command eq "replace") {
1003: $editor->ReplaceLine($p1, $p2); # p1 - key p2 = newline.
1004: } elsif ($command eq "delete") {
1005: $editor->DeleteLine($p1); # p1 - key p2 null.
1006: } else { # Should not get here!!!
1007: die "Invalid command given to ApplyEdit $command"
1008: }
1009: }
1010: #
1011: # AdjustOurHost:
1012: # Adjusts a host file stored in a configuration file editor object
1013: # for the true IP address of this host. This is necessary for hosts
1014: # that live behind a firewall.
1015: # Those hosts have a publicly distributed IP of the firewall, but
1016: # internally must use their actual IP. We assume that a given
1017: # host only has a single IP interface for now.
1018: # Formal Parameters:
1019: # editor - The configuration file editor to adjust. This
1020: # editor is assumed to contain a hosts.tab file.
1021: # Strategy:
1022: # - Figure out our hostname.
1023: # - Lookup the entry for this host.
1024: # - Modify the line to contain our IP
1025: # - Do a replace for this host.
1026: sub AdjustOurHost {
1027: my $editor = shift;
1028:
1029: # figure out who I am.
1030:
1031: my $myHostName = $perlvar{'lonHostID'}; # LonCAPA hostname.
1032:
1033: # Get my host file entry.
1034:
1035: my $ConfigLine = $editor->Find($myHostName);
1036: if(! (defined $ConfigLine)) {
1037: die "AdjustOurHost - no entry for me in hosts file $myHostName";
1038: }
1039: # figure out my IP:
1040: # Use the config line to get my hostname.
1041: # Use gethostbyname to translate that into an IP address.
1042: #
1043: my ($id,$domain,$role,$name,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);
1044: #
1045: # Reassemble the config line from the elements in the list.
1046: # Note that if the loncnew items were not present before, they will
1047: # be now even if they would be empty
1048: #
1049: my $newConfigLine = $id;
1050: foreach my $item ($domain, $role, $name, $maxcon, $idleto, $mincon) {
1051: $newConfigLine .= ":".$item;
1052: }
1053: # Replace the line:
1054:
1055: $editor->ReplaceLine($id, $newConfigLine);
1056:
1057: }
1058: #
1059: # ReplaceConfigFile:
1060: # Replaces a configuration file with the contents of a
1061: # configuration file editor object.
1062: # This is done by:
1063: # - Copying the target file to <filename>.old
1064: # - Writing the new file to <filename>.tmp
1065: # - Moving <filename.tmp> -> <filename>
1066: # This laborious process ensures that the system is never without
1067: # a configuration file that's at least valid (even if the contents
1068: # may be dated).
1069: # Parameters:
1070: # filename - Name of the file to modify... this is a full path.
1071: # editor - Editor containing the file.
1072: #
1073: sub ReplaceConfigFile {
1074:
1075: my ($filename, $editor) = @_;
1076:
1077: CopyFile ($filename, $filename.".old");
1078:
1079: my $contents = $editor->Get(); # Get the contents of the file.
1080:
1081: InstallFile($filename, $contents);
1082: }
1083: #
1084: #
1085: # Called to edit a configuration table file
1086: # Parameters:
1087: # request - The entire command/request sent by lonc or lonManage
1088: # Return:
1089: # The reply to send to the client.
1090: #
1091: sub EditFile {
1092: my $request = shift;
1093:
1094: # Split the command into it's pieces: edit:filetype:script
1095:
1096: my ($cmd, $filetype, $script) = split(/:/, $request,3); # : in script
1097:
1098: # Check the pre-coditions for success:
1099:
1100: if($cmd != "edit") { # Something is amiss afoot alack.
1101: return "error:edit request detected, but request != 'edit'\n";
1102: }
1103: if( ($filetype ne "hosts") &&
1104: ($filetype ne "domain")) {
1105: return "error:edit requested with invalid file specifier: $filetype \n";
1106: }
1107:
1108: # Split the edit script and check it's validity.
1109:
1110: my @scriptlines = split(/\n/, $script); # one line per element.
1111: my $linecount = scalar(@scriptlines);
1112: for(my $i = 0; $i < $linecount; $i++) {
1113: chomp($scriptlines[$i]);
1114: if(!isValidEditCommand($scriptlines[$i])) {
1115: return "error:edit with bad script line: '$scriptlines[$i]' \n";
1116: }
1117: }
1118:
1119: # Execute the edit operation.
1120: # - Create a config file editor for the appropriate file and
1121: # - execute each command in the script:
1122: #
1123: my $configfile = ConfigFileFromSelector($filetype);
1124: if (!(defined $configfile)) {
1125: return "refused\n";
1126: }
1127: my $editor = ConfigFileEdit->new($configfile);
1128:
1129: for (my $i = 0; $i < $linecount; $i++) {
1130: ApplyEdit($scriptlines[$i], $editor);
1131: }
1132: # If the file is the host file, ensure that our host is
1133: # adjusted to have our ip:
1134: #
1135: if($filetype eq "host") {
1136: AdjustOurHost($editor);
1137: }
1138: # Finally replace the current file with our file.
1139: #
1140: ReplaceConfigFile($configfile, $editor);
1141:
1142: return "ok\n";
1143: }
1144:
1145: # read_profile
1146: #
1147: # Returns a set of specific entries from a user's profile file.
1148: # this is a utility function that is used by both get_profile_entry and
1149: # get_profile_entry_encrypted.
1150: #
1151: # Parameters:
1152: # udom - Domain in which the user exists.
1153: # uname - User's account name (loncapa account)
1154: # namespace - The profile namespace to open.
1155: # what - A set of & separated queries.
1156: # Returns:
1157: # If all ok: - The string that needs to be shipped back to the user.
1158: # If failure - A string that starts with error: followed by the failure
1159: # reason.. note that this probabyl gets shipped back to the
1160: # user as well.
1161: #
1162: sub read_profile {
1163: my ($udom, $uname, $namespace, $what) = @_;
1164:
1165: my $hashref = &tie_user_hash($udom, $uname, $namespace,
1166: &GDBM_READER());
1167: if ($hashref) {
1168: my @queries=split(/\&/,$what);
1169: if ($namespace eq 'roles') {
1170: @queries = map { &unescape($_); } @queries;
1171: }
1172: my $qresult='';
1173:
1174: for (my $i=0;$i<=$#queries;$i++) {
1175: $qresult.="$hashref->{$queries[$i]}&"; # Presumably failure gives empty string.
1176: }
1177: $qresult=~s/\&$//; # Remove trailing & from last lookup.
1178: if (&untie_user_hash($hashref)) {
1179: return $qresult;
1180: } else {
1181: return "error: ".($!+0)." untie (GDBM) Failed";
1182: }
1183: } else {
1184: if ($!+0 == 2) {
1185: return "error:No such file or GDBM reported bad block error";
1186: } else {
1187: return "error: ".($!+0)." tie (GDBM) Failed";
1188: }
1189: }
1190:
1191: }
1192: #--------------------- Request Handlers --------------------------------------------
1193: #
1194: # By convention each request handler registers itself prior to the sub
1195: # declaration:
1196: #
1197:
1198: #++
1199: #
1200: # Handles ping requests.
1201: # Parameters:
1202: # $cmd - the actual keyword that invoked us.
1203: # $tail - the tail of the request that invoked us.
1204: # $replyfd- File descriptor connected to the client
1205: # Implicit Inputs:
1206: # $currenthostid - Global variable that carries the name of the host we are
1207: # known as.
1208: # Returns:
1209: # 1 - Ok to continue processing.
1210: # 0 - Program should exit.
1211: # Side effects:
1212: # Reply information is sent to the client.
1213: sub ping_handler {
1214: my ($cmd, $tail, $client) = @_;
1215: Debug("$cmd $tail $client .. $currenthostid:");
1216:
1217: Reply( $client,\$currenthostid,"$cmd:$tail");
1218:
1219: return 1;
1220: }
1221: ®ister_handler("ping", \&ping_handler, 0, 1, 1); # Ping unencoded, client or manager.
1222:
1223: #++
1224: #
1225: # Handles pong requests. Pong replies with our current host id, and
1226: # the results of a ping sent to us via our lonc.
1227: #
1228: # Parameters:
1229: # $cmd - the actual keyword that invoked us.
1230: # $tail - the tail of the request that invoked us.
1231: # $replyfd- File descriptor connected to the client
1232: # Implicit Inputs:
1233: # $currenthostid - Global variable that carries the name of the host we are
1234: # connected to.
1235: # Returns:
1236: # 1 - Ok to continue processing.
1237: # 0 - Program should exit.
1238: # Side effects:
1239: # Reply information is sent to the client.
1240: sub pong_handler {
1241: my ($cmd, $tail, $replyfd) = @_;
1242:
1243: my $reply=&Apache::lonnet::reply("ping",$clientname);
1244: &Reply( $replyfd, "$currenthostid:$reply\n", "$cmd:$tail");
1245: return 1;
1246: }
1247: ®ister_handler("pong", \&pong_handler, 0, 1, 1); # Pong unencoded, client or manager
1248:
1249: #++
1250: # Called to establish an encrypted session key with the remote client.
1251: # Note that with secure lond, in most cases this function is never
1252: # invoked. Instead, the secure session key is established either
1253: # via a local file that's locked down tight and only lives for a short
1254: # time, or via an ssl tunnel...and is generated from a bunch-o-random
1255: # bits from /dev/urandom, rather than the predictable pattern used by
1256: # by this sub. This sub is only used in the old-style insecure
1257: # key negotiation.
1258: # Parameters:
1259: # $cmd - the actual keyword that invoked us.
1260: # $tail - the tail of the request that invoked us.
1261: # $replyfd- File descriptor connected to the client
1262: # Implicit Inputs:
1263: # $currenthostid - Global variable that carries the name of the host
1264: # known as.
1265: # $clientname - Global variable that carries the name of the host we're connected to.
1266: # Returns:
1267: # 1 - Ok to continue processing.
1268: # 0 - Program should exit.
1269: # Implicit Outputs:
1270: # Reply information is sent to the client.
1271: # $cipher is set with a reference to a new IDEA encryption object.
1272: #
1273: sub establish_key_handler {
1274: my ($cmd, $tail, $replyfd) = @_;
1275:
1276: my $buildkey=time.$$.int(rand 100000);
1277: $buildkey=~tr/1-6/A-F/;
1278: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
1279: my $key=$currenthostid.$clientname;
1280: $key=~tr/a-z/A-Z/;
1281: $key=~tr/G-P/0-9/;
1282: $key=~tr/Q-Z/0-9/;
1283: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
1284: $key=substr($key,0,32);
1285: my $cipherkey=pack("H32",$key);
1286: $cipher=new IDEA $cipherkey;
1287: &Reply($replyfd, \$buildkey, "$cmd:$tail");
1288:
1289: return 1;
1290:
1291: }
1292: ®ister_handler("ekey", \&establish_key_handler, 0, 1,1);
1293:
1294: # Handler for the load command. Returns the current system load average
1295: # to the requestor.
1296: #
1297: # Parameters:
1298: # $cmd - the actual keyword that invoked us.
1299: # $tail - the tail of the request that invoked us.
1300: # $replyfd- File descriptor connected to the client
1301: # Implicit Inputs:
1302: # $currenthostid - Global variable that carries the name of the host
1303: # known as.
1304: # $clientname - Global variable that carries the name of the host we're connected to.
1305: # Returns:
1306: # 1 - Ok to continue processing.
1307: # 0 - Program should exit.
1308: # Side effects:
1309: # Reply information is sent to the client.
1310: sub load_handler {
1311: my ($cmd, $tail, $replyfd) = @_;
1312:
1313:
1314:
1315: # Get the load average from /proc/loadavg and calculate it as a percentage of
1316: # the allowed load limit as set by the perl global variable lonLoadLim
1317:
1318: my $loadavg;
1319: my $loadfile=IO::File->new('/proc/loadavg');
1320:
1321: $loadavg=<$loadfile>;
1322: $loadavg =~ s/\s.*//g; # Extract the first field only.
1323:
1324: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1325:
1326: &Reply( $replyfd, \$loadpercent, "$cmd:$tail");
1327:
1328: return 1;
1329: }
1330: ®ister_handler("load", \&load_handler, 0, 1, 0);
1331:
1332: #
1333: # Process the userload request. This sub returns to the client the current
1334: # user load average. It can be invoked either by clients or managers.
1335: #
1336: # Parameters:
1337: # $cmd - the actual keyword that invoked us.
1338: # $tail - the tail of the request that invoked us.
1339: # $replyfd- File descriptor connected to the client
1340: # Implicit Inputs:
1341: # $currenthostid - Global variable that carries the name of the host
1342: # known as.
1343: # $clientname - Global variable that carries the name of the host we're connected to.
1344: # Returns:
1345: # 1 - Ok to continue processing.
1346: # 0 - Program should exit
1347: # Implicit inputs:
1348: # whatever the userload() function requires.
1349: # Implicit outputs:
1350: # the reply is written to the client.
1351: #
1352: sub user_load_handler {
1353: my ($cmd, $tail, $replyfd) = @_;
1354:
1355: my $userloadpercent=&Apache::lonnet::userload();
1356: &Reply($replyfd, \$userloadpercent, "$cmd:$tail");
1357:
1358: return 1;
1359: }
1360: ®ister_handler("userload", \&user_load_handler, 0, 1, 0);
1361:
1362: # Process a request for the authorization type of a user:
1363: # (userauth).
1364: #
1365: # Parameters:
1366: # $cmd - the actual keyword that invoked us.
1367: # $tail - the tail of the request that invoked us.
1368: # $replyfd- File descriptor connected to the client
1369: # Returns:
1370: # 1 - Ok to continue processing.
1371: # 0 - Program should exit
1372: # Implicit outputs:
1373: # The user authorization type is written to the client.
1374: #
1375: sub user_authorization_type {
1376: my ($cmd, $tail, $replyfd) = @_;
1377:
1378: my $userinput = "$cmd:$tail";
1379:
1380: # Pull the domain and username out of the command tail.
1381: # and call get_auth_type to determine the authentication type.
1382:
1383: my ($udom,$uname)=split(/:/,$tail);
1384: my $result = &get_auth_type($udom, $uname);
1385: if($result eq "nouser") {
1386: &Failure( $replyfd, "unknown_user\n", $userinput);
1387: } else {
1388: #
1389: # We only want to pass the second field from get_auth_type
1390: # for ^krb.. otherwise we'll be handing out the encrypted
1391: # password for internals e.g.
1392: #
1393: my ($type,$otherinfo) = split(/:/,$result);
1394: if($type =~ /^krb/) {
1395: $type = $result;
1396: } else {
1397: $type .= ':';
1398: }
1399: &Reply( $replyfd, \$type, $userinput);
1400: }
1401:
1402: return 1;
1403: }
1404: ®ister_handler("currentauth", \&user_authorization_type, 1, 1, 0);
1405:
1406: # Process a request by a manager to push a hosts or domain table
1407: # to us. We pick apart the command and pass it on to the subs
1408: # that already exist to do this.
1409: #
1410: # Parameters:
1411: # $cmd - the actual keyword that invoked us.
1412: # $tail - the tail of the request that invoked us.
1413: # $client - File descriptor connected to the client
1414: # Returns:
1415: # 1 - Ok to continue processing.
1416: # 0 - Program should exit
1417: # Implicit Output:
1418: # a reply is written to the client.
1419: sub push_file_handler {
1420: my ($cmd, $tail, $client) = @_;
1421: &Debug("In push file handler");
1422: my $userinput = "$cmd:$tail";
1423:
1424: # At this time we only know that the IP of our partner is a valid manager
1425: # the code below is a hook to do further authentication (e.g. to resolve
1426: # spoofing).
1427:
1428: my $cert = &GetCertificate($userinput);
1429: if(&ValidManager($cert)) {
1430: &Debug("Valid manager: $client");
1431:
1432: # Now presumably we have the bona fides of both the peer host and the
1433: # process making the request.
1434:
1435: my $reply = &PushFile($userinput);
1436: &Reply($client, \$reply, $userinput);
1437:
1438: } else {
1439: &logthis("push_file_handler $client is not valid");
1440: &Failure( $client, "refused\n", $userinput);
1441: }
1442: return 1;
1443: }
1444: ®ister_handler("pushfile", \&push_file_handler, 1, 0, 1);
1445:
1446: # The du_handler routine should be considered obsolete and is retained
1447: # for communication with legacy servers. Please see the du2_handler.
1448: #
1449: # du - list the disk usage of a directory recursively.
1450: #
1451: # note: stolen code from the ls file handler
1452: # under construction by Rick Banghart
1453: # .
1454: # Parameters:
1455: # $cmd - The command that dispatched us (du).
1456: # $ududir - The directory path to list... I'm not sure what this
1457: # is relative as things like ls:. return e.g.
1458: # no_such_dir.
1459: # $client - Socket open on the client.
1460: # Returns:
1461: # 1 - indicating that the daemon should not disconnect.
1462: # Side Effects:
1463: # The reply is written to $client.
1464: #
1465: sub du_handler {
1466: my ($cmd, $ududir, $client) = @_;
1467: ($ududir) = split(/:/,$ududir); # Make 'telnet' testing easier.
1468: my $userinput = "$cmd:$ududir";
1469:
1470: if ($ududir=~/\.\./ || $ududir!~m|^/home/httpd/|) {
1471: &Failure($client,"refused\n","$cmd:$ududir");
1472: return 1;
1473: }
1474: # Since $ududir could have some nasties in it,
1475: # we will require that ududir is a valid
1476: # directory. Just in case someone tries to
1477: # slip us a line like .;(cd /home/httpd rm -rf*)
1478: # etc.
1479: #
1480: if (-d $ududir) {
1481: my $total_size=0;
1482: my $code=sub {
1483: if ($_=~/\.\d+\./) { return;}
1484: if ($_=~/\.meta$/) { return;}
1485: if (-d $_) { return;}
1486: $total_size+=(stat($_))[7];
1487: };
1488: chdir($ududir);
1489: find($code,$ududir);
1490: $total_size=int($total_size/1024);
1491: &Reply($client,\$total_size,"$cmd:$ududir");
1492: } else {
1493: &Failure($client, "bad_directory:$ududir\n","$cmd:$ududir");
1494: }
1495: return 1;
1496: }
1497: ®ister_handler("du", \&du_handler, 0, 1, 0);
1498:
1499: # Please also see the du_handler, which is obsoleted by du2.
1500: # du2_handler differs from du_handler in that required path to directory
1501: # provided by &propath() is prepended in the handler instead of on the
1502: # client side.
1503: #
1504: # du2 - list the disk usage of a directory recursively.
1505: #
1506: # Parameters:
1507: # $cmd - The command that dispatched us (du).
1508: # $tail - The tail of the request that invoked us.
1509: # $tail is a : separated list of the following:
1510: # - $ududir - directory path to list (before prepending)
1511: # - $getpropath = 1 if &propath() should prepend
1512: # - $uname - username to use for &propath or user dir
1513: # - $udom - domain to use for &propath or user dir
1514: # All are escaped.
1515: # $client - Socket open on the client.
1516: # Returns:
1517: # 1 - indicating that the daemon should not disconnect.
1518: # Side Effects:
1519: # The reply is written to $client.
1520: #
1521:
1522: sub du2_handler {
1523: my ($cmd, $tail, $client) = @_;
1524: my ($ududir,$getpropath,$uname,$udom) = map { &unescape($_) } (split(/:/, $tail));
1525: my $userinput = "$cmd:$tail";
1526: if (($ududir=~/\.\./) || (($ududir!~m|^/home/httpd/|) && (!$getpropath))) {
1527: &Failure($client,"refused\n","$cmd:$tail");
1528: return 1;
1529: }
1530: if ($getpropath) {
1531: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
1532: $ududir = &propath($udom,$uname).'/'.$ududir;
1533: } else {
1534: &Failure($client,"refused\n","$cmd:$tail");
1535: return 1;
1536: }
1537: }
1538: # Since $ududir could have some nasties in it,
1539: # we will require that ududir is a valid
1540: # directory. Just in case someone tries to
1541: # slip us a line like .;(cd /home/httpd rm -rf*)
1542: # etc.
1543: #
1544: if (-d $ududir) {
1545: my $total_size=0;
1546: my $code=sub {
1547: if ($_=~/\.\d+\./) { return;}
1548: if ($_=~/\.meta$/) { return;}
1549: if (-d $_) { return;}
1550: $total_size+=(stat($_))[7];
1551: };
1552: chdir($ududir);
1553: find($code,$ududir);
1554: $total_size=int($total_size/1024);
1555: &Reply($client,\$total_size,"$cmd:$ududir");
1556: } else {
1557: &Failure($client, "bad_directory:$ududir\n","$cmd:$tail");
1558: }
1559: return 1;
1560: }
1561: ®ister_handler("du2", \&du2_handler, 0, 1, 0);
1562:
1563: #
1564: # The ls_handler routine should be considered obsolete and is retained
1565: # for communication with legacy servers. Please see the ls3_handler.
1566: #
1567: # ls - list the contents of a directory. For each file in the
1568: # selected directory the filename followed by the full output of
1569: # the stat function is returned. The returned info for each
1570: # file are separated by ':'. The stat fields are separated by &'s.
1571: #
1572: # If the requested path contains /../ or is:
1573: #
1574: # 1. for a directory, and the path does not begin with one of:
1575: # (a) /home/httpd/html/res/<domain>
1576: # (b) /home/httpd/html/res/userfiles/
1577: # (c) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/userfiles
1578: # or is:
1579: #
1580: # 2. for a file, and the path (after prepending) does not begin with:
1581: # /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/
1582: #
1583: # the response will be "refused".
1584: #
1585: # Parameters:
1586: # $cmd - The command that dispatched us (ls).
1587: # $ulsdir - The directory path to list... I'm not sure what this
1588: # is relative as things like ls:. return e.g.
1589: # no_such_dir.
1590: # $client - Socket open on the client.
1591: # Returns:
1592: # 1 - indicating that the daemon should not disconnect.
1593: # Side Effects:
1594: # The reply is written to $client.
1595: #
1596: sub ls_handler {
1597: # obsoleted by ls2_handler
1598: my ($cmd, $ulsdir, $client) = @_;
1599:
1600: my $userinput = "$cmd:$ulsdir";
1601:
1602: my $obs;
1603: my $rights;
1604: my $ulsout='';
1605: my $ulsfn;
1606: if ($ulsdir =~m{/\.\./}) {
1607: &Failure($client,"refused\n",$userinput);
1608: return 1;
1609: }
1610: if (-e $ulsdir) {
1611: if(-d $ulsdir) {
1612: unless (($ulsdir =~ m{/home/httpd/html/(res/$LONCAPA::match_domain|userfiles/)}) ||
1613: ($ulsdir =~ m{/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_username/userfiles/})) {
1614: &Failure($client,"refused\n",$userinput);
1615: return 1;
1616: }
1617: if (opendir(LSDIR,$ulsdir)) {
1618: while ($ulsfn=readdir(LSDIR)) {
1619: undef($obs);
1620: undef($rights);
1621: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1622: #We do some obsolete checking here
1623: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1624: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1625: my @obsolete=<FILE>;
1626: foreach my $obsolete (@obsolete) {
1627: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1628: if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
1629: }
1630: }
1631: $ulsout.=$ulsfn.'&'.join('&',@ulsstats);
1632: if($obs eq '1') { $ulsout.="&1"; }
1633: else { $ulsout.="&0"; }
1634: if($rights eq '1') { $ulsout.="&1:"; }
1635: else { $ulsout.="&0:"; }
1636: }
1637: closedir(LSDIR);
1638: }
1639: } else {
1640: unless ($ulsdir =~ m{/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_username/}) {
1641: &Failure($client,"refused\n",$userinput);
1642: return 1;
1643: }
1644: my @ulsstats=stat($ulsdir);
1645: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1646: }
1647: } else {
1648: $ulsout='no_such_dir';
1649: }
1650: if ($ulsout eq '') { $ulsout='empty'; }
1651: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1652:
1653: return 1;
1654:
1655: }
1656: ®ister_handler("ls", \&ls_handler, 0, 1, 0);
1657:
1658: # The ls2_handler routine should be considered obsolete and is retained
1659: # for communication with legacy servers. Please see the ls3_handler.
1660: # Please also see the ls_handler, which was itself obsoleted by ls2.
1661: # ls2_handler differs from ls_handler in that it escapes its return
1662: # values before concatenating them together with ':'s.
1663: #
1664: # ls2 - list the contents of a directory. For each file in the
1665: # selected directory the filename followed by the full output of
1666: # the stat function is returned. The returned info for each
1667: # file are separated by ':'. The stat fields are separated by &'s.
1668: #
1669: # If the requested path contains /../ or is:
1670: #
1671: # 1. for a directory, and the path does not begin with one of:
1672: # (a) /home/httpd/html/res/<domain>
1673: # (b) /home/httpd/html/res/userfiles/
1674: # (c) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/userfiles
1675: # or is:
1676: #
1677: # 2. for a file, and the path (after prepending) does not begin with:
1678: # /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/
1679: #
1680: # the response will be "refused".
1681: #
1682: # Parameters:
1683: # $cmd - The command that dispatched us (ls).
1684: # $ulsdir - The directory path to list... I'm not sure what this
1685: # is relative as things like ls:. return e.g.
1686: # no_such_dir.
1687: # $client - Socket open on the client.
1688: # Returns:
1689: # 1 - indicating that the daemon should not disconnect.
1690: # Side Effects:
1691: # The reply is written to $client.
1692: #
1693: sub ls2_handler {
1694: my ($cmd, $ulsdir, $client) = @_;
1695:
1696: my $userinput = "$cmd:$ulsdir";
1697:
1698: my $obs;
1699: my $rights;
1700: my $ulsout='';
1701: my $ulsfn;
1702: if ($ulsdir =~m{/\.\./}) {
1703: &Failure($client,"refused\n",$userinput);
1704: return 1;
1705: }
1706: if (-e $ulsdir) {
1707: if(-d $ulsdir) {
1708: unless (($ulsdir =~ m{/home/httpd/html/(res/$LONCAPA::match_domain|userfiles/)}) ||
1709: ($ulsdir =~ m{/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_username/userfiles/})) {
1710: &Failure($client,"refused\n","$userinput");
1711: return 1;
1712: }
1713: if (opendir(LSDIR,$ulsdir)) {
1714: while ($ulsfn=readdir(LSDIR)) {
1715: undef($obs);
1716: undef($rights);
1717: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1718: #We do some obsolete checking here
1719: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1720: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1721: my @obsolete=<FILE>;
1722: foreach my $obsolete (@obsolete) {
1723: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1724: if($obsolete =~ m|(<copyright>)(default)|) {
1725: $rights = 1;
1726: }
1727: }
1728: }
1729: my $tmp = $ulsfn.'&'.join('&',@ulsstats);
1730: if ($obs eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1731: if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1732: $ulsout.= &escape($tmp).':';
1733: }
1734: closedir(LSDIR);
1735: }
1736: } else {
1737: unless ($ulsdir =~ m{/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_username/}) {
1738: &Failure($client,"refused\n",$userinput);
1739: return 1;
1740: }
1741: my @ulsstats=stat($ulsdir);
1742: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1743: }
1744: } else {
1745: $ulsout='no_such_dir';
1746: }
1747: if ($ulsout eq '') { $ulsout='empty'; }
1748: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1749: return 1;
1750: }
1751: ®ister_handler("ls2", \&ls2_handler, 0, 1, 0);
1752: #
1753: # ls3 - list the contents of a directory. For each file in the
1754: # selected directory the filename followed by the full output of
1755: # the stat function is returned. The returned info for each
1756: # file are separated by ':'. The stat fields are separated by &'s.
1757: #
1758: # If the requested path (after prepending) contains /../ or is:
1759: #
1760: # 1. for a directory, and the path does not begin with one of:
1761: # (a) /home/httpd/html/res/<domain>
1762: # (b) /home/httpd/html/res/userfiles/
1763: # (c) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/userfiles
1764: # (d) /home/httpd/html/priv/<domain>/ and client is the homeserver
1765: #
1766: # or is:
1767: #
1768: # 2. for a file, and the path (after prepending) does not begin with:
1769: # /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/
1770: #
1771: # the response will be "refused".
1772: #
1773: # Parameters:
1774: # $cmd - The command that dispatched us (ls).
1775: # $tail - The tail of the request that invoked us.
1776: # $tail is a : separated list of the following:
1777: # - $ulsdir - directory path to list (before prepending)
1778: # - $getpropath = 1 if &propath() should prepend
1779: # - $getuserdir = 1 if path to user dir in lonUsers should
1780: # prepend
1781: # - $alternate_root - path to prepend
1782: # - $uname - username to use for &propath or user dir
1783: # - $udom - domain to use for &propath or user dir
1784: # All of these except $getpropath and &getuserdir are escaped.
1785: # no_such_dir.
1786: # $client - Socket open on the client.
1787: # Returns:
1788: # 1 - indicating that the daemon should not disconnect.
1789: # Side Effects:
1790: # The reply is written to $client.
1791: #
1792:
1793: sub ls3_handler {
1794: my ($cmd, $tail, $client) = @_;
1795: my $userinput = "$cmd:$tail";
1796: my ($ulsdir,$getpropath,$getuserdir,$alternate_root,$uname,$udom) =
1797: split(/:/,$tail);
1798: if (defined($ulsdir)) {
1799: $ulsdir = &unescape($ulsdir);
1800: }
1801: if (defined($alternate_root)) {
1802: $alternate_root = &unescape($alternate_root);
1803: }
1804: if (defined($uname)) {
1805: $uname = &unescape($uname);
1806: }
1807: if (defined($udom)) {
1808: $udom = &unescape($udom);
1809: }
1810:
1811: my $dir_root = $perlvar{'lonDocRoot'};
1812: if (($getpropath) || ($getuserdir)) {
1813: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
1814: $dir_root = &propath($udom,$uname);
1815: $dir_root =~ s/\/$//;
1816: } else {
1817: &Failure($client,"refused\n",$userinput);
1818: return 1;
1819: }
1820: } elsif ($alternate_root ne '') {
1821: $dir_root = $alternate_root;
1822: }
1823: if (($dir_root ne '') && ($dir_root ne '/')) {
1824: if ($ulsdir =~ /^\//) {
1825: $ulsdir = $dir_root.$ulsdir;
1826: } else {
1827: $ulsdir = $dir_root.'/'.$ulsdir;
1828: }
1829: }
1830: if ($ulsdir =~m{/\.\./}) {
1831: &Failure($client,"refused\n",$userinput);
1832: return 1;
1833: }
1834: my $islocal;
1835: my @machine_ids = &Apache::lonnet::current_machine_ids();
1836: if (grep(/^\Q$clientname\E$/,@machine_ids)) {
1837: $islocal = 1;
1838: }
1839: my $obs;
1840: my $rights;
1841: my $ulsout='';
1842: my $ulsfn;
1843: if (-e $ulsdir) {
1844: if(-d $ulsdir) {
1845: unless (($getpropath) || ($getuserdir) ||
1846: ($ulsdir =~ m{/home/httpd/html/(res/$LONCAPA::match_domain|userfiles/)}) ||
1847: ($ulsdir =~ m{/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_username/userfiles/}) ||
1848: (($ulsdir =~ m{/home/httpd/html/priv/$LONCAPA::match_domain/}) && ($islocal))) {
1849: &Failure($client,"refused\n",$userinput);
1850: return 1;
1851: }
1852: if (opendir(LSDIR,$ulsdir)) {
1853: while ($ulsfn=readdir(LSDIR)) {
1854: undef($obs);
1855: undef($rights);
1856: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1857: #We do some obsolete checking here
1858: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1859: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1860: my @obsolete=<FILE>;
1861: foreach my $obsolete (@obsolete) {
1862: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1863: if($obsolete =~ m|(<copyright>)(default)|) {
1864: $rights = 1;
1865: }
1866: }
1867: }
1868: my $tmp = $ulsfn.'&'.join('&',@ulsstats);
1869: if ($obs eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1870: if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1871: $ulsout.= &escape($tmp).':';
1872: }
1873: closedir(LSDIR);
1874: }
1875: } else {
1876: unless (($getpropath) || ($getuserdir) ||
1877: ($ulsdir =~ m{/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_username/})) {
1878: &Failure($client,"refused\n",$userinput);
1879: return 1;
1880: }
1881: my @ulsstats=stat($ulsdir);
1882: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1883: }
1884: } else {
1885: $ulsout='no_such_dir';
1886: }
1887: if ($ulsout eq '') { $ulsout='empty'; }
1888: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1889: return 1;
1890: }
1891: ®ister_handler("ls3", \&ls3_handler, 0, 1, 0);
1892:
1893: sub read_lonnet_global {
1894: my ($cmd,$tail,$client) = @_;
1895: my $userinput = "$cmd:$tail";
1896: my $requested = &Apache::lonnet::thaw_unescape($tail);
1897: my $result;
1898: my %packagevars = (
1899: spareid => \%Apache::lonnet::spareid,
1900: perlvar => \%Apache::lonnet::perlvar,
1901: );
1902: my %limit_to = (
1903: perlvar => {
1904: lonOtherAuthen => 1,
1905: lonBalancer => 1,
1906: lonVersion => 1,
1907: lonAdmEMail => 1,
1908: lonSupportEMail => 1,
1909: lonSysEMail => 1,
1910: lonHostID => 1,
1911: lonRole => 1,
1912: lonDefDomain => 1,
1913: lonLoadLim => 1,
1914: lonUserLoadLim => 1,
1915: }
1916: );
1917: if (ref($requested) eq 'HASH') {
1918: foreach my $what (keys(%{$requested})) {
1919: my $response;
1920: my $items = {};
1921: if (exists($packagevars{$what})) {
1922: if (ref($limit_to{$what}) eq 'HASH') {
1923: foreach my $varname (keys(%{$packagevars{$what}})) {
1924: if ($limit_to{$what}{$varname}) {
1925: $items->{$varname} = $packagevars{$what}{$varname};
1926: }
1927: }
1928: } else {
1929: $items = $packagevars{$what};
1930: }
1931: if ($what eq 'perlvar') {
1932: if (!exists($packagevars{$what}{'lonBalancer'})) {
1933: if ($dist =~ /^(centos|rhes|fedora|scientific)/) {
1934: my $othervarref=LONCAPA::Configuration::read_conf('httpd.conf');
1935: if (ref($othervarref) eq 'HASH') {
1936: $items->{'lonBalancer'} = $othervarref->{'lonBalancer'};
1937: }
1938: }
1939: }
1940: }
1941: $response = &Apache::lonnet::freeze_escape($items);
1942: }
1943: $result .= &escape($what).'='.$response.'&';
1944: }
1945: }
1946: $result =~ s/\&$//;
1947: &Reply($client,\$result,$userinput);
1948: return 1;
1949: }
1950: ®ister_handler("readlonnetglobal", \&read_lonnet_global, 0, 1, 0);
1951:
1952: sub server_devalidatecache_handler {
1953: my ($cmd,$tail,$client) = @_;
1954: my $userinput = "$cmd:$tail";
1955: my $items = &unescape($tail);
1956: my @cached = split(/\&/,$items);
1957: foreach my $key (@cached) {
1958: if ($key =~ /:/) {
1959: my ($name,$id) = map { &unescape($_); } split(/:/,$key);
1960: &Apache::lonnet::devalidate_cache_new($name,$id);
1961: }
1962: }
1963: my $result = 'ok';
1964: &Reply($client,\$result,$userinput);
1965: return 1;
1966: }
1967: ®ister_handler("devalidatecache", \&server_devalidatecache_handler, 0, 1, 0);
1968:
1969: sub server_timezone_handler {
1970: my ($cmd,$tail,$client) = @_;
1971: my $userinput = "$cmd:$tail";
1972: my $timezone;
1973: my $clockfile = '/etc/sysconfig/clock'; # Fedora/CentOS/SuSE
1974: my $tzfile = '/etc/timezone'; # Debian/Ubuntu
1975: if (-e $clockfile) {
1976: if (open(my $fh,"<$clockfile")) {
1977: while (<$fh>) {
1978: next if (/^[\#\s]/);
1979: if (/^(?:TIME)?ZONE\s*=\s*['"]?\s*([\w\/]+)/) {
1980: $timezone = $1;
1981: last;
1982: }
1983: }
1984: close($fh);
1985: }
1986: } elsif (-e $tzfile) {
1987: if (open(my $fh,"<$tzfile")) {
1988: $timezone = <$fh>;
1989: close($fh);
1990: chomp($timezone);
1991: if ($timezone =~ m{^Etc/(\w+)$}) {
1992: $timezone = $1;
1993: }
1994: }
1995: }
1996: &Reply($client,\$timezone,$userinput); # This supports debug logging.
1997: return 1;
1998: }
1999: ®ister_handler("servertimezone", \&server_timezone_handler, 0, 1, 0);
2000:
2001: sub server_loncaparev_handler {
2002: my ($cmd,$tail,$client) = @_;
2003: my $userinput = "$cmd:$tail";
2004: &Reply($client,\$perlvar{'lonVersion'},$userinput);
2005: return 1;
2006: }
2007: ®ister_handler("serverloncaparev", \&server_loncaparev_handler, 0, 1, 0);
2008:
2009: sub server_homeID_handler {
2010: my ($cmd,$tail,$client) = @_;
2011: my $userinput = "$cmd:$tail";
2012: &Reply($client,\$perlvar{'lonHostID'},$userinput);
2013: return 1;
2014: }
2015: ®ister_handler("serverhomeID", \&server_homeID_handler, 0, 1, 0);
2016:
2017: sub server_distarch_handler {
2018: my ($cmd,$tail,$client) = @_;
2019: my $userinput = "$cmd:$tail";
2020: my $reply = &distro_and_arch();
2021: &Reply($client,\$reply,$userinput);
2022: return 1;
2023: }
2024: ®ister_handler("serverdistarch", \&server_distarch_handler, 0, 1, 0);
2025:
2026: sub server_certs_handler {
2027: my ($cmd,$tail,$client) = @_;
2028: my $userinput = "$cmd:$tail";
2029: my $result;
2030: my $result = &LONCAPA::Lond::server_certs(\%perlvar);
2031: &Reply($client,\$result,$userinput);
2032: return;
2033: }
2034: ®ister_handler("servercerts", \&server_certs_handler, 0, 1, 0);
2035:
2036: # Process a reinit request. Reinit requests that either
2037: # lonc or lond be reinitialized so that an updated
2038: # host.tab or domain.tab can be processed.
2039: #
2040: # Parameters:
2041: # $cmd - the actual keyword that invoked us.
2042: # $tail - the tail of the request that invoked us.
2043: # $client - File descriptor connected to the client
2044: # Returns:
2045: # 1 - Ok to continue processing.
2046: # 0 - Program should exit
2047: # Implicit output:
2048: # a reply is sent to the client.
2049: #
2050: sub reinit_process_handler {
2051: my ($cmd, $tail, $client) = @_;
2052:
2053: my $userinput = "$cmd:$tail";
2054:
2055: my $cert = &GetCertificate($userinput);
2056: if(&ValidManager($cert)) {
2057: chomp($userinput);
2058: my $reply = &ReinitProcess($userinput);
2059: &Reply( $client, \$reply, $userinput);
2060: } else {
2061: &Failure( $client, "refused\n", $userinput);
2062: }
2063: return 1;
2064: }
2065: ®ister_handler("reinit", \&reinit_process_handler, 1, 0, 1);
2066:
2067: # Process the editing script for a table edit operation.
2068: # the editing operation must be encrypted and requested by
2069: # a manager host.
2070: #
2071: # Parameters:
2072: # $cmd - the actual keyword that invoked us.
2073: # $tail - the tail of the request that invoked us.
2074: # $client - File descriptor connected to the client
2075: # Returns:
2076: # 1 - Ok to continue processing.
2077: # 0 - Program should exit
2078: # Implicit output:
2079: # a reply is sent to the client.
2080: #
2081: sub edit_table_handler {
2082: my ($command, $tail, $client) = @_;
2083:
2084: my $userinput = "$command:$tail";
2085:
2086: my $cert = &GetCertificate($userinput);
2087: if(&ValidManager($cert)) {
2088: my($filetype, $script) = split(/:/, $tail);
2089: if (($filetype eq "hosts") ||
2090: ($filetype eq "domain")) {
2091: if($script ne "") {
2092: &Reply($client, # BUGBUG - EditFile
2093: &EditFile($userinput), # could fail.
2094: $userinput);
2095: } else {
2096: &Failure($client,"refused\n",$userinput);
2097: }
2098: } else {
2099: &Failure($client,"refused\n",$userinput);
2100: }
2101: } else {
2102: &Failure($client,"refused\n",$userinput);
2103: }
2104: return 1;
2105: }
2106: ®ister_handler("edit", \&edit_table_handler, 1, 0, 1);
2107:
2108: #
2109: # Authenticate a user against the LonCAPA authentication
2110: # database. Note that there are several authentication
2111: # possibilities:
2112: # - unix - The user can be authenticated against the unix
2113: # password file.
2114: # - internal - The user can be authenticated against a purely
2115: # internal per user password file.
2116: # - kerberos - The user can be authenticated against either a kerb4 or kerb5
2117: # ticket granting authority.
2118: # - user - The person tailoring LonCAPA can supply a user authentication
2119: # mechanism that is per system.
2120: #
2121: # Parameters:
2122: # $cmd - The command that got us here.
2123: # $tail - Tail of the command (remaining parameters).
2124: # $client - File descriptor connected to client.
2125: # Returns
2126: # 0 - Requested to exit, caller should shut down.
2127: # 1 - Continue processing.
2128: # Implicit inputs:
2129: # The authentication systems describe above have their own forms of implicit
2130: # input into the authentication process that are described above.
2131: #
2132: sub authenticate_handler {
2133: my ($cmd, $tail, $client) = @_;
2134:
2135:
2136: # Regenerate the full input line
2137:
2138: my $userinput = $cmd.":".$tail;
2139:
2140: # udom - User's domain.
2141: # uname - Username.
2142: # upass - User's password.
2143: # checkdefauth - Pass to validate_user() to try authentication
2144: # with default auth type(s) if no user account.
2145: # clientcancheckhost - Passed by clients with functionality in lonauth.pm
2146: # to check if session can be hosted.
2147:
2148: my ($udom, $uname, $upass, $checkdefauth, $clientcancheckhost)=split(/:/,$tail);
2149: &Debug(" Authenticate domain = $udom, user = $uname, password = $upass, checkdefauth = $checkdefauth");
2150: chomp($upass);
2151: $upass=&unescape($upass);
2152:
2153: my $pwdcorrect = &validate_user($udom,$uname,$upass,$checkdefauth);
2154: if($pwdcorrect) {
2155: my $canhost = 1;
2156: unless ($clientcancheckhost) {
2157: my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
2158: my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
2159: my @intdoms;
2160: my $internet_names = &Apache::lonnet::get_internet_names($clientname);
2161: if (ref($internet_names) eq 'ARRAY') {
2162: @intdoms = @{$internet_names};
2163: }
2164: unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
2165: my ($remote,$hosted);
2166: my $remotesession = &get_usersession_config($udom,'remotesession');
2167: if (ref($remotesession) eq 'HASH') {
2168: $remote = $remotesession->{'remote'};
2169: }
2170: my $hostedsession = &get_usersession_config($clienthomedom,'hostedsession');
2171: if (ref($hostedsession) eq 'HASH') {
2172: $hosted = $hostedsession->{'hosted'};
2173: }
2174: $canhost = &Apache::lonnet::can_host_session($udom,$clientname,
2175: $clientversion,
2176: $remote,$hosted);
2177: }
2178: }
2179: if ($canhost) {
2180: &Reply( $client, "authorized\n", $userinput);
2181: } else {
2182: &Reply( $client, "not_allowed_to_host\n", $userinput);
2183: }
2184: #
2185: # Bad credentials: Failed to authorize
2186: #
2187: } else {
2188: &Failure( $client, "non_authorized\n", $userinput);
2189: }
2190:
2191: return 1;
2192: }
2193: ®ister_handler("auth", \&authenticate_handler, 1, 1, 0);
2194:
2195: #
2196: # Change a user's password. Note that this function is complicated by
2197: # the fact that a user may be authenticated in more than one way:
2198: # At present, we are not able to change the password for all types of
2199: # authentication methods. Only for:
2200: # unix - unix password or shadow passoword style authentication.
2201: # local - Locally written authentication mechanism.
2202: # For now, kerb4 and kerb5 password changes are not supported and result
2203: # in an error.
2204: # FUTURE WORK:
2205: # Support kerberos passwd changes?
2206: # Parameters:
2207: # $cmd - The command that got us here.
2208: # $tail - Tail of the command (remaining parameters).
2209: # $client - File descriptor connected to client.
2210: # Returns
2211: # 0 - Requested to exit, caller should shut down.
2212: # 1 - Continue processing.
2213: # Implicit inputs:
2214: # The authentication systems describe above have their own forms of implicit
2215: # input into the authentication process that are described above.
2216: sub change_password_handler {
2217: my ($cmd, $tail, $client) = @_;
2218:
2219: my $userinput = $cmd.":".$tail; # Reconstruct client's string.
2220:
2221: #
2222: # udom - user's domain.
2223: # uname - Username.
2224: # upass - Current password.
2225: # npass - New password.
2226: # context - Context in which this was called
2227: # (preferences or reset_by_email).
2228: # lonhost - HostID of server where request originated
2229:
2230: my ($udom,$uname,$upass,$npass,$context,$lonhost)=split(/:/,$tail);
2231:
2232: $upass=&unescape($upass);
2233: $npass=&unescape($npass);
2234: &Debug("Trying to change password for $uname");
2235:
2236: # First require that the user can be authenticated with their
2237: # old password unless context was 'reset_by_email':
2238:
2239: my ($validated,$failure);
2240: if ($context eq 'reset_by_email') {
2241: if ($lonhost eq '') {
2242: $failure = 'invalid_client';
2243: } else {
2244: $validated = 1;
2245: }
2246: } else {
2247: $validated = &validate_user($udom, $uname, $upass);
2248: }
2249: if($validated) {
2250: my $realpasswd = &get_auth_type($udom, $uname); # Defined since authd.
2251:
2252: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
2253: if ($howpwd eq 'internal') {
2254: &Debug("internal auth");
2255: my $ncpass = &hash_passwd($udom,$npass);
2256: if(&rewrite_password_file($udom, $uname, "internal:$ncpass")) {
2257: my $msg="Result of password change for $uname: pwchange_success";
2258: if ($lonhost) {
2259: $msg .= " - request originated from: $lonhost";
2260: }
2261: &logthis($msg);
2262: &update_passwd_history($uname,$udom,$howpwd,$context);
2263: &Reply($client, "ok\n", $userinput);
2264: } else {
2265: &logthis("Unable to open $uname passwd "
2266: ."to change password");
2267: &Failure( $client, "non_authorized\n",$userinput);
2268: }
2269: } elsif ($howpwd eq 'unix' && $context ne 'reset_by_email') {
2270: my $result = &change_unix_password($uname, $npass);
2271: if ($result eq 'ok') {
2272: &update_passwd_history($uname,$udom,$howpwd,$context);
2273: }
2274: &logthis("Result of password change for $uname: ".
2275: $result);
2276: &Reply($client, \$result, $userinput);
2277: } else {
2278: # this just means that the current password mode is not
2279: # one we know how to change (e.g the kerberos auth modes or
2280: # locally written auth handler).
2281: #
2282: &Failure( $client, "auth_mode_error\n", $userinput);
2283: }
2284:
2285: } else {
2286: if ($failure eq '') {
2287: $failure = 'non_authorized';
2288: }
2289: &Failure( $client, "$failure\n", $userinput);
2290: }
2291:
2292: return 1;
2293: }
2294: ®ister_handler("passwd", \&change_password_handler, 1, 1, 0);
2295:
2296: sub hash_passwd {
2297: my ($domain,$plainpass,@rest) = @_;
2298: my ($salt,$cost);
2299: if (@rest) {
2300: $cost = $rest[0];
2301: # salt is first 22 characters, base-64 encoded by bcrypt
2302: my $plainsalt = substr($rest[1],0,22);
2303: $salt = Crypt::Eksblowfish::Bcrypt::de_base64($plainsalt);
2304: } else {
2305: my $defaultcost;
2306: my %domconfig =
2307: &Apache::lonnet::get_dom('configuration',['password'],$domain);
2308: if (ref($domconfig{'password'}) eq 'HASH') {
2309: $defaultcost = $domconfig{'password'}{'cost'};
2310: }
2311: if (($defaultcost eq '') || ($defaultcost =~ /D/)) {
2312: $cost = 10;
2313: } else {
2314: $cost = $defaultcost;
2315: }
2316: # Generate random 16-octet base64 salt
2317: $salt = "";
2318: $salt .= pack("C", int rand(256)) for 1..16;
2319: }
2320: my $hash = &Crypt::Eksblowfish::Bcrypt::bcrypt_hash({
2321: key_nul => 1,
2322: cost => $cost,
2323: salt => $salt,
2324: }, Digest::SHA::sha512(Encode::encode('UTF-8',$plainpass)));
2325:
2326: my $result = join("!", "", "bcrypt", sprintf("%02d",$cost),
2327: &Crypt::Eksblowfish::Bcrypt::en_base64($salt).
2328: &Crypt::Eksblowfish::Bcrypt::en_base64($hash));
2329: return $result;
2330: }
2331:
2332: #
2333: # Create a new user. User in this case means a lon-capa user.
2334: # The user must either already exist in some authentication realm
2335: # like kerberos or the /etc/passwd. If not, a user completely local to
2336: # this loncapa system is created.
2337: #
2338: # Parameters:
2339: # $cmd - The command that got us here.
2340: # $tail - Tail of the command (remaining parameters).
2341: # $client - File descriptor connected to client.
2342: # Returns
2343: # 0 - Requested to exit, caller should shut down.
2344: # 1 - Continue processing.
2345: # Implicit inputs:
2346: # The authentication systems describe above have their own forms of implicit
2347: # input into the authentication process that are described above.
2348: sub add_user_handler {
2349:
2350: my ($cmd, $tail, $client) = @_;
2351:
2352:
2353: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
2354: my $userinput = $cmd.":".$tail; # Reconstruct the full request line.
2355:
2356: &Debug("cmd =".$cmd." $udom =".$udom." uname=".$uname);
2357:
2358:
2359: if($udom eq $currentdomainid) { # Reject new users for other domains...
2360:
2361: my $oldumask=umask(0077);
2362: chomp($npass);
2363: $npass=&unescape($npass);
2364: my $passfilename = &password_path($udom, $uname);
2365: &Debug("Password file created will be:".$passfilename);
2366: if (-e $passfilename) {
2367: &Failure( $client, "already_exists\n", $userinput);
2368: } else {
2369: my $fperror='';
2370: if (!&mkpath($passfilename)) {
2371: $fperror="error: ".($!+0)." mkdir failed while attempting "
2372: ."makeuser";
2373: }
2374: unless ($fperror) {
2375: my $result=&make_passwd_file($uname,$udom,$umode,$npass,
2376: $passfilename,'makeuser');
2377: &Reply($client,\$result, $userinput); #BUGBUG - could be fail
2378: } else {
2379: &Failure($client, \$fperror, $userinput);
2380: }
2381: }
2382: umask($oldumask);
2383: } else {
2384: &Failure($client, "not_right_domain\n",
2385: $userinput); # Even if we are multihomed.
2386:
2387: }
2388: return 1;
2389:
2390: }
2391: ®ister_handler("makeuser", \&add_user_handler, 1, 1, 0);
2392:
2393: #
2394: # Change the authentication method of a user. Note that this may
2395: # also implicitly change the user's password if, for example, the user is
2396: # joining an existing authentication realm. Known authentication realms at
2397: # this time are:
2398: # internal - Purely internal password file (only loncapa knows this user)
2399: # local - Institutionally written authentication module.
2400: # unix - Unix user (/etc/passwd with or without /etc/shadow).
2401: # kerb4 - kerberos version 4
2402: # kerb5 - kerberos version 5
2403: #
2404: # Parameters:
2405: # $cmd - The command that got us here.
2406: # $tail - Tail of the command (remaining parameters).
2407: # $client - File descriptor connected to client.
2408: # Returns
2409: # 0 - Requested to exit, caller should shut down.
2410: # 1 - Continue processing.
2411: # Implicit inputs:
2412: # The authentication systems describe above have their own forms of implicit
2413: # input into the authentication process that are described above.
2414: # NOTE:
2415: # This is also used to change the authentication credential values (e.g. passwd).
2416: #
2417: #
2418: sub change_authentication_handler {
2419:
2420: my ($cmd, $tail, $client) = @_;
2421:
2422: my $userinput = "$cmd:$tail"; # Reconstruct user input.
2423:
2424: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
2425: &Debug("cmd = ".$cmd." domain= ".$udom."uname =".$uname." umode= ".$umode);
2426: if ($udom ne $currentdomainid) {
2427: &Failure( $client, "not_right_domain\n", $client);
2428: } else {
2429:
2430: chomp($npass);
2431:
2432: $npass=&unescape($npass);
2433: my $oldauth = &get_auth_type($udom, $uname); # Get old auth info.
2434: my $passfilename = &password_path($udom, $uname);
2435: if ($passfilename) { # Not allowed to create a new user!!
2436: # If just changing the unix passwd. need to arrange to run
2437: # passwd since otherwise make_passwd_file will fail as
2438: # creation of unix authenticated users is no longer supported
2439: # except from the command line, when running make_domain_coordinator.pl
2440:
2441: if(($oldauth =~/^unix/) && ($umode eq "unix")) {
2442: my $result = &change_unix_password($uname, $npass);
2443: &logthis("Result of password change for $uname: ".$result);
2444: if ($result eq "ok") {
2445: &update_passwd_history($uname,$udom,$umode,'changeuserauth');
2446: &Reply($client, \$result);
2447: } else {
2448: &Failure($client, \$result);
2449: }
2450: } else {
2451: my $result=&make_passwd_file($uname,$udom,$umode,$npass,
2452: $passfilename,'changeuserauth');
2453: #
2454: # If the current auth mode is internal, and the old auth mode was
2455: # unix, or krb*, and the user is an author for this domain,
2456: # re-run manage_permissions for that role in order to be able
2457: # to take ownership of the construction space back to www:www
2458: #
2459:
2460:
2461: &Reply($client, \$result, $userinput);
2462: }
2463:
2464:
2465: } else {
2466: &Failure($client, "non_authorized\n", $userinput); # Fail the user now.
2467: }
2468: }
2469: return 1;
2470: }
2471: ®ister_handler("changeuserauth", \&change_authentication_handler, 1,1, 0);
2472:
2473: sub update_passwd_history {
2474: my ($uname,$udom,$umode,$context) = @_;
2475: my $proname=&propath($udom,$uname);
2476: my $now = time;
2477: if (open(my $fh,">>$proname/passwd.log")) {
2478: print $fh "$now:$umode:$context\n";
2479: close($fh);
2480: }
2481: return;
2482: }
2483:
2484: #
2485: # Determines if this is the home server for a user. The home server
2486: # for a user will have his/her lon-capa passwd file. Therefore all we need
2487: # to do is determine if this file exists.
2488: #
2489: # Parameters:
2490: # $cmd - The command that got us here.
2491: # $tail - Tail of the command (remaining parameters).
2492: # $client - File descriptor connected to client.
2493: # Returns
2494: # 0 - Requested to exit, caller should shut down.
2495: # 1 - Continue processing.
2496: # Implicit inputs:
2497: # The authentication systems describe above have their own forms of implicit
2498: # input into the authentication process that are described above.
2499: #
2500: sub is_home_handler {
2501: my ($cmd, $tail, $client) = @_;
2502:
2503: my $userinput = "$cmd:$tail";
2504:
2505: my ($udom,$uname)=split(/:/,$tail);
2506: chomp($uname);
2507: my $passfile = &password_filename($udom, $uname);
2508: if($passfile) {
2509: &Reply( $client, "found\n", $userinput);
2510: } else {
2511: &Failure($client, "not_found\n", $userinput);
2512: }
2513: return 1;
2514: }
2515: ®ister_handler("home", \&is_home_handler, 0,1,0);
2516:
2517: #
2518: # Process an update request for a resource.
2519: # A resource has been modified that we hold a subscription to.
2520: # If the resource is not local, then we must update, or at least invalidate our
2521: # cached copy of the resource.
2522: # Parameters:
2523: # $cmd - The command that got us here.
2524: # $tail - Tail of the command (remaining parameters).
2525: # $client - File descriptor connected to client.
2526: # Returns
2527: # 0 - Requested to exit, caller should shut down.
2528: # 1 - Continue processing.
2529: # Implicit inputs:
2530: # The authentication systems describe above have their own forms of implicit
2531: # input into the authentication process that are described above.
2532: #
2533: sub update_resource_handler {
2534:
2535: my ($cmd, $tail, $client) = @_;
2536:
2537: my $userinput = "$cmd:$tail";
2538:
2539: my $fname= $tail; # This allows interactive testing
2540:
2541:
2542: my $ownership=ishome($fname);
2543: if ($ownership eq 'not_owner') {
2544: if (-e $fname) {
2545: # Delete preview file, if exists
2546: unlink("$fname.tmp");
2547: # Get usage stats
2548: my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
2549: $atime,$mtime,$ctime,$blksize,$blocks)=stat($fname);
2550: my $now=time;
2551: my $since=$now-$atime;
2552: # If the file has not been used within lonExpire seconds,
2553: # unsubscribe from it and delete local copy
2554: if ($since>$perlvar{'lonExpire'}) {
2555: my $reply=&Apache::lonnet::reply("unsub:$fname","$clientname");
2556: &devalidate_meta_cache($fname);
2557: unlink("$fname");
2558: unlink("$fname.meta");
2559: } else {
2560: # Yes, this is in active use. Get a fresh copy. Since it might be in
2561: # very active use and huge (like a movie), copy it to "in.transfer" filename first.
2562: my $transname="$fname.in.transfer";
2563: my $remoteurl=&Apache::lonnet::reply("sub:$fname","$clientname");
2564: my $response;
2565: # FIXME: cannot replicate files that take more than two minutes to transfer?
2566: # alarm(120);
2567: # FIXME: this should use the LWP mechanism, not internal alarms.
2568: alarm(1200);
2569: {
2570: my $request=new HTTP::Request('GET',"$remoteurl");
2571: $response=&LONCAPA::LWPReq::makerequest($clientname,$request,$transname,\%perlvar,1200,0,1);
2572: }
2573: alarm(0);
2574: if ($response->is_error()) {
2575: # FIXME: we should probably clean up here instead of just whine
2576: unlink($transname);
2577: my $message=$response->status_line;
2578: &logthis("LWP GET: $message for $fname ($remoteurl)");
2579: } else {
2580: if ($remoteurl!~/\.meta$/) {
2581: # FIXME: isn't there an internal LWP mechanism for this?
2582: alarm(120);
2583: {
2584: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
2585: my $mresponse = &LONCAPA::LWPReq::makerequest($clientname,$mrequest,$fname.'.meta',\%perlvar,120,0,1);
2586: if ($mresponse->is_error()) {
2587: unlink($fname.'.meta');
2588: }
2589: }
2590: alarm(0);
2591: }
2592: # we successfully transfered, copy file over to real name
2593: rename($transname,$fname);
2594: &devalidate_meta_cache($fname);
2595: }
2596: }
2597: &Reply( $client, "ok\n", $userinput);
2598: } else {
2599: &Failure($client, "not_found\n", $userinput);
2600: }
2601: } else {
2602: &Failure($client, "rejected\n", $userinput);
2603: }
2604: return 1;
2605: }
2606: ®ister_handler("update", \&update_resource_handler, 0 ,1, 0);
2607:
2608: sub devalidate_meta_cache {
2609: my ($url) = @_;
2610: use Cache::Memcached;
2611: my $memcache = new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
2612: $url = &Apache::lonnet::declutter($url);
2613: $url =~ s-\.meta$--;
2614: my $id = &escape('meta:'.$url);
2615: $memcache->delete($id);
2616: }
2617:
2618: #
2619: # Fetch a user file from a remote server to the user's home directory
2620: # userfiles subdir.
2621: # Parameters:
2622: # $cmd - The command that got us here.
2623: # $tail - Tail of the command (remaining parameters).
2624: # $client - File descriptor connected to client.
2625: # Returns
2626: # 0 - Requested to exit, caller should shut down.
2627: # 1 - Continue processing.
2628: #
2629: sub fetch_user_file_handler {
2630:
2631: my ($cmd, $tail, $client) = @_;
2632:
2633: my $userinput = "$cmd:$tail";
2634: my $fname = $tail;
2635: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
2636: my $udir=&propath($udom,$uname).'/userfiles';
2637: unless (-e $udir) {
2638: mkdir($udir,0770);
2639: }
2640: Debug("fetch user file for $fname");
2641: if (-e $udir) {
2642: $ufile=~s/^[\.\~]+//;
2643:
2644: # IF necessary, create the path right down to the file.
2645: # Note that any regular files in the way of this path are
2646: # wiped out to deal with some earlier folly of mine.
2647:
2648: if (!&mkpath($udir.'/'.$ufile)) {
2649: &Failure($client, "unable_to_create\n", $userinput);
2650: }
2651:
2652: my $destname=$udir.'/'.$ufile;
2653: my $transname=$udir.'/'.$ufile.'.in.transit';
2654: my $clientprotocol=$Apache::lonnet::protocol{$clientname};
2655: $clientprotocol = 'http' if ($clientprotocol ne 'https');
2656: my $clienthost = &Apache::lonnet::hostname($clientname);
2657: my $remoteurl=$clientprotocol.'://'.$clienthost.'/userfiles/'.$fname;
2658: my $response;
2659: Debug("Remote URL : $remoteurl Transfername $transname Destname: $destname");
2660: alarm(1200);
2661: {
2662: my $request=new HTTP::Request('GET',"$remoteurl");
2663: my $verifycert = 1;
2664: my @machine_ids = &Apache::lonnet::current_machine_ids();
2665: if (grep(/^\Q$clientname\E$/,@machine_ids)) {
2666: $verifycert = 0;
2667: }
2668: $response = &LONCAPA::LWPReq::makerequest($clientname,$request,$transname,\%perlvar,1200,$verifycert);
2669: }
2670: alarm(0);
2671: if ($response->is_error()) {
2672: unlink($transname);
2673: my $message=$response->status_line;
2674: &logthis("LWP GET: $message for $fname ($remoteurl)");
2675: &Failure($client, "failed\n", $userinput);
2676: } else {
2677: Debug("Renaming $transname to $destname");
2678: if (!rename($transname,$destname)) {
2679: &logthis("Unable to move $transname to $destname");
2680: unlink($transname);
2681: &Failure($client, "failed\n", $userinput);
2682: } else {
2683: if ($fname =~ /^default.+\.(page|sequence)$/) {
2684: my ($major,$minor) = split(/\./,$clientversion);
2685: if (($major < 2) || ($major == 2 && $minor < 11)) {
2686: my $now = time;
2687: &Apache::lonnet::do_cache_new('crschange',$udom.'_'.$uname,$now,600);
2688: my $key = &escape('internal.contentchange');
2689: my $what = "$key=$now";
2690: my $hashref = &tie_user_hash($udom,$uname,'environment',
2691: &GDBM_WRCREAT(),"P",$what);
2692: if ($hashref) {
2693: $hashref->{$key}=$now;
2694: if (!&untie_user_hash($hashref)) {
2695: &logthis("error: ".($!+0)." untie (GDBM) failed ".
2696: "when updating internal.contentchange");
2697: }
2698: }
2699: }
2700: }
2701: &Reply($client, "ok\n", $userinput);
2702: }
2703: }
2704: } else {
2705: &Failure($client, "not_home\n", $userinput);
2706: }
2707: return 1;
2708: }
2709: ®ister_handler("fetchuserfile", \&fetch_user_file_handler, 0, 1, 0);
2710:
2711: #
2712: # Remove a file from a user's home directory userfiles subdirectory.
2713: # Parameters:
2714: # cmd - the Lond request keyword that got us here.
2715: # tail - the part of the command past the keyword.
2716: # client- File descriptor connected with the client.
2717: #
2718: # Returns:
2719: # 1 - Continue processing.
2720: sub remove_user_file_handler {
2721: my ($cmd, $tail, $client) = @_;
2722:
2723: my ($fname) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2724:
2725: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
2726: if ($ufile =~m|/\.\./|) {
2727: # any files paths with /../ in them refuse
2728: # to deal with
2729: &Failure($client, "refused\n", "$cmd:$tail");
2730: } else {
2731: my $udir = &propath($udom,$uname);
2732: if (-e $udir) {
2733: my $file=$udir.'/userfiles/'.$ufile;
2734: if (-e $file) {
2735: #
2736: # If the file is a regular file unlink is fine...
2737: # However it's possible the client wants a dir
2738: # removed, in which case rmdir is more appropriate.
2739: # Note: rmdir will only remove an empty directory.
2740: #
2741: if (-f $file){
2742: unlink($file);
2743: # for html files remove the associated .bak file
2744: # which may have been created by the editor.
2745: if ($ufile =~ m{^((docs|supplemental)/(?:\d+|default)/\d+(?:|/.+)/)[^/]+\.x?html?$}i) {
2746: my $path = $1;
2747: if (-e $file.'.bak') {
2748: unlink($file.'.bak');
2749: }
2750: }
2751: } elsif(-d $file) {
2752: rmdir($file);
2753: }
2754: if (-e $file) {
2755: # File is still there after we deleted it ?!?
2756:
2757: &Failure($client, "failed\n", "$cmd:$tail");
2758: } else {
2759: &Reply($client, "ok\n", "$cmd:$tail");
2760: }
2761: } else {
2762: &Failure($client, "not_found\n", "$cmd:$tail");
2763: }
2764: } else {
2765: &Failure($client, "not_home\n", "$cmd:$tail");
2766: }
2767: }
2768: return 1;
2769: }
2770: ®ister_handler("removeuserfile", \&remove_user_file_handler, 0,1,0);
2771:
2772: #
2773: # make a directory in a user's home directory userfiles subdirectory.
2774: # Parameters:
2775: # cmd - the Lond request keyword that got us here.
2776: # tail - the part of the command past the keyword.
2777: # client- File descriptor connected with the client.
2778: #
2779: # Returns:
2780: # 1 - Continue processing.
2781: sub mkdir_user_file_handler {
2782: my ($cmd, $tail, $client) = @_;
2783:
2784: my ($dir) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2785: $dir=&unescape($dir);
2786: my ($udom,$uname,$ufile) = ($dir =~ m|^([^/]+)/([^/]+)/(.+)$|);
2787: if ($ufile =~m|/\.\./|) {
2788: # any files paths with /../ in them refuse
2789: # to deal with
2790: &Failure($client, "refused\n", "$cmd:$tail");
2791: } else {
2792: my $udir = &propath($udom,$uname);
2793: if (-e $udir) {
2794: my $newdir=$udir.'/userfiles/'.$ufile.'/';
2795: if (!&mkpath($newdir)) {
2796: &Failure($client, "failed\n", "$cmd:$tail");
2797: }
2798: &Reply($client, "ok\n", "$cmd:$tail");
2799: } else {
2800: &Failure($client, "not_home\n", "$cmd:$tail");
2801: }
2802: }
2803: return 1;
2804: }
2805: ®ister_handler("mkdiruserfile", \&mkdir_user_file_handler, 0,1,0);
2806:
2807: #
2808: # rename a file in a user's home directory userfiles subdirectory.
2809: # Parameters:
2810: # cmd - the Lond request keyword that got us here.
2811: # tail - the part of the command past the keyword.
2812: # client- File descriptor connected with the client.
2813: #
2814: # Returns:
2815: # 1 - Continue processing.
2816: sub rename_user_file_handler {
2817: my ($cmd, $tail, $client) = @_;
2818:
2819: my ($udom,$uname,$old,$new) = split(/:/, $tail);
2820: $old=&unescape($old);
2821: $new=&unescape($new);
2822: if ($new =~m|/\.\./| || $old =~m|/\.\./|) {
2823: # any files paths with /../ in them refuse to deal with
2824: &Failure($client, "refused\n", "$cmd:$tail");
2825: } else {
2826: my $udir = &propath($udom,$uname);
2827: if (-e $udir) {
2828: my $oldfile=$udir.'/userfiles/'.$old;
2829: my $newfile=$udir.'/userfiles/'.$new;
2830: if (-e $newfile) {
2831: &Failure($client, "exists\n", "$cmd:$tail");
2832: } elsif (! -e $oldfile) {
2833: &Failure($client, "not_found\n", "$cmd:$tail");
2834: } else {
2835: if (!rename($oldfile,$newfile)) {
2836: &Failure($client, "failed\n", "$cmd:$tail");
2837: } else {
2838: &Reply($client, "ok\n", "$cmd:$tail");
2839: }
2840: }
2841: } else {
2842: &Failure($client, "not_home\n", "$cmd:$tail");
2843: }
2844: }
2845: return 1;
2846: }
2847: ®ister_handler("renameuserfile", \&rename_user_file_handler, 0,1,0);
2848:
2849: #
2850: # Checks if the specified user has an active session on the server
2851: # return ok if so, not_found if not
2852: #
2853: # Parameters:
2854: # cmd - The request keyword that dispatched to tus.
2855: # tail - The tail of the request (colon separated parameters).
2856: # client - Filehandle open on the client.
2857: # Return:
2858: # 1.
2859: sub user_has_session_handler {
2860: my ($cmd, $tail, $client) = @_;
2861:
2862: my ($udom, $uname) = map { &unescape($_) } (split(/:/, $tail));
2863:
2864: opendir(DIR,$perlvar{'lonIDsDir'});
2865: my $filename;
2866: while ($filename=readdir(DIR)) {
2867: last if ($filename=~/^\Q$uname\E_\d+_\Q$udom\E_/);
2868: }
2869: if ($filename) {
2870: &Reply($client, "ok\n", "$cmd:$tail");
2871: } else {
2872: &Failure($client, "not_found\n", "$cmd:$tail");
2873: }
2874: return 1;
2875:
2876: }
2877: ®ister_handler("userhassession", \&user_has_session_handler, 0,1,0);
2878:
2879: #
2880: # Authenticate access to a user file by checking that the token the user's
2881: # passed also exists in their session file
2882: #
2883: # Parameters:
2884: # cmd - The request keyword that dispatched to tus.
2885: # tail - The tail of the request (colon separated parameters).
2886: # client - Filehandle open on the client.
2887: # Return:
2888: # 1.
2889: sub token_auth_user_file_handler {
2890: my ($cmd, $tail, $client) = @_;
2891:
2892: my ($fname, $session) = split(/:/, $tail);
2893:
2894: chomp($session);
2895: my $reply="non_auth";
2896: my $file = $perlvar{'lonIDsDir'}.'/'.$session.'.id';
2897: if (open(ENVIN,"$file")) {
2898: flock(ENVIN,LOCK_SH);
2899: tie(my %disk_env,'GDBM_File',"$file",&GDBM_READER(),0640);
2900: if (exists($disk_env{"userfile.$fname"})) {
2901: $reply="ok";
2902: } else {
2903: foreach my $envname (keys(%disk_env)) {
2904: if ($envname=~ m|^userfile\.\Q$fname\E|) {
2905: $reply="ok";
2906: last;
2907: }
2908: }
2909: }
2910: untie(%disk_env);
2911: close(ENVIN);
2912: &Reply($client, \$reply, "$cmd:$tail");
2913: } else {
2914: &Failure($client, "invalid_token\n", "$cmd:$tail");
2915: }
2916: return 1;
2917:
2918: }
2919: ®ister_handler("tokenauthuserfile", \&token_auth_user_file_handler, 0,1,0);
2920:
2921: #
2922: # Unsubscribe from a resource.
2923: #
2924: # Parameters:
2925: # $cmd - The command that got us here.
2926: # $tail - Tail of the command (remaining parameters).
2927: # $client - File descriptor connected to client.
2928: # Returns
2929: # 0 - Requested to exit, caller should shut down.
2930: # 1 - Continue processing.
2931: #
2932: sub unsubscribe_handler {
2933: my ($cmd, $tail, $client) = @_;
2934:
2935: my $userinput= "$cmd:$tail";
2936:
2937: my ($fname) = split(/:/,$tail); # Split in case there's extrs.
2938:
2939: &Debug("Unsubscribing $fname");
2940: if (-e $fname) {
2941: &Debug("Exists");
2942: &Reply($client, &unsub($fname,$clientip), $userinput);
2943: } else {
2944: &Failure($client, "not_found\n", $userinput);
2945: }
2946: return 1;
2947: }
2948: ®ister_handler("unsub", \&unsubscribe_handler, 0, 1, 0);
2949:
2950: # Subscribe to a resource
2951: #
2952: # Parameters:
2953: # $cmd - The command that got us here.
2954: # $tail - Tail of the command (remaining parameters).
2955: # $client - File descriptor connected to client.
2956: # Returns
2957: # 0 - Requested to exit, caller should shut down.
2958: # 1 - Continue processing.
2959: #
2960: sub subscribe_handler {
2961: my ($cmd, $tail, $client)= @_;
2962:
2963: my $userinput = "$cmd:$tail";
2964:
2965: &Reply( $client, &subscribe($userinput,$clientip), $userinput);
2966:
2967: return 1;
2968: }
2969: ®ister_handler("sub", \&subscribe_handler, 0, 1, 0);
2970:
2971: #
2972: # Determine the latest version of a resource (it looks for the highest
2973: # past version and then returns that +1)
2974: #
2975: # Parameters:
2976: # $cmd - The command that got us here.
2977: # $tail - Tail of the command (remaining parameters).
2978: # (Should consist of an absolute path to a file)
2979: # $client - File descriptor connected to client.
2980: # Returns
2981: # 0 - Requested to exit, caller should shut down.
2982: # 1 - Continue processing.
2983: #
2984: sub current_version_handler {
2985: my ($cmd, $tail, $client) = @_;
2986:
2987: my $userinput= "$cmd:$tail";
2988:
2989: my $fname = $tail;
2990: &Reply( $client, ¤tversion($fname)."\n", $userinput);
2991: return 1;
2992:
2993: }
2994: ®ister_handler("currentversion", \¤t_version_handler, 0, 1, 0);
2995:
2996: # Make an entry in a user's activity log.
2997: #
2998: # Parameters:
2999: # $cmd - The command that got us here.
3000: # $tail - Tail of the command (remaining parameters).
3001: # $client - File descriptor connected to client.
3002: # Returns
3003: # 0 - Requested to exit, caller should shut down.
3004: # 1 - Continue processing.
3005: #
3006: sub activity_log_handler {
3007: my ($cmd, $tail, $client) = @_;
3008:
3009:
3010: my $userinput= "$cmd:$tail";
3011:
3012: my ($udom,$uname,$what)=split(/:/,$tail);
3013: chomp($what);
3014: my $proname=&propath($udom,$uname);
3015: my $now=time;
3016: my $hfh;
3017: if ($hfh=IO::File->new(">>$proname/activity.log")) {
3018: print $hfh "$now:$clientname:$what\n";
3019: &Reply( $client, "ok\n", $userinput);
3020: } else {
3021: &Failure($client, "error: ".($!+0)." IO::File->new Failed "
3022: ."while attempting log\n",
3023: $userinput);
3024: }
3025:
3026: return 1;
3027: }
3028: ®ister_handler("log", \&activity_log_handler, 0, 1, 0);
3029:
3030: #
3031: # Put a namespace entry in a user profile hash.
3032: # My druthers would be for this to be an encrypted interaction too.
3033: # anything that might be an inadvertent covert channel about either
3034: # user authentication or user personal information....
3035: #
3036: # Parameters:
3037: # $cmd - The command that got us here.
3038: # $tail - Tail of the command (remaining parameters).
3039: # $client - File descriptor connected to client.
3040: # Returns
3041: # 0 - Requested to exit, caller should shut down.
3042: # 1 - Continue processing.
3043: #
3044: sub put_user_profile_entry {
3045: my ($cmd, $tail, $client) = @_;
3046:
3047: my $userinput = "$cmd:$tail";
3048:
3049: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
3050: if ($namespace ne 'roles') {
3051: chomp($what);
3052: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3053: &GDBM_WRCREAT(),"P",$what);
3054: if($hashref) {
3055: my @pairs=split(/\&/,$what);
3056: foreach my $pair (@pairs) {
3057: my ($key,$value)=split(/=/,$pair);
3058: $hashref->{$key}=$value;
3059: }
3060: if (&untie_user_hash($hashref)) {
3061: &Reply( $client, "ok\n", $userinput);
3062: } else {
3063: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
3064: "while attempting put\n",
3065: $userinput);
3066: }
3067: } else {
3068: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3069: "while attempting put\n", $userinput);
3070: }
3071: } else {
3072: &Failure( $client, "refused\n", $userinput);
3073: }
3074:
3075: return 1;
3076: }
3077: ®ister_handler("put", \&put_user_profile_entry, 0, 1, 0);
3078:
3079: # Put a piece of new data in hash, returns error if entry already exists
3080: # Parameters:
3081: # $cmd - The command that got us here.
3082: # $tail - Tail of the command (remaining parameters).
3083: # $client - File descriptor connected to client.
3084: # Returns
3085: # 0 - Requested to exit, caller should shut down.
3086: # 1 - Continue processing.
3087: #
3088: sub newput_user_profile_entry {
3089: my ($cmd, $tail, $client) = @_;
3090:
3091: my $userinput = "$cmd:$tail";
3092:
3093: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
3094: if ($namespace eq 'roles') {
3095: &Failure( $client, "refused\n", $userinput);
3096: return 1;
3097: }
3098:
3099: chomp($what);
3100:
3101: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3102: &GDBM_WRCREAT(),"N",$what);
3103: if(!$hashref) {
3104: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3105: "while attempting put\n", $userinput);
3106: return 1;
3107: }
3108:
3109: my @pairs=split(/\&/,$what);
3110: foreach my $pair (@pairs) {
3111: my ($key,$value)=split(/=/,$pair);
3112: if (exists($hashref->{$key})) {
3113: if (!&untie_user_hash($hashref)) {
3114: &logthis("error: ".($!+0)." untie (GDBM) failed ".
3115: "while attempting newput - early out as key exists");
3116: }
3117: &Failure($client, "key_exists: ".$key."\n",$userinput);
3118: return 1;
3119: }
3120: }
3121:
3122: foreach my $pair (@pairs) {
3123: my ($key,$value)=split(/=/,$pair);
3124: $hashref->{$key}=$value;
3125: }
3126:
3127: if (&untie_user_hash($hashref)) {
3128: &Reply( $client, "ok\n", $userinput);
3129: } else {
3130: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
3131: "while attempting put\n",
3132: $userinput);
3133: }
3134: return 1;
3135: }
3136: ®ister_handler("newput", \&newput_user_profile_entry, 0, 1, 0);
3137:
3138: #
3139: # Increment a profile entry in the user history file.
3140: # The history contains keyword value pairs. In this case,
3141: # The value itself is a pair of numbers. The first, the current value
3142: # the second an increment that this function applies to the current
3143: # value.
3144: #
3145: # Parameters:
3146: # $cmd - The command that got us here.
3147: # $tail - Tail of the command (remaining parameters).
3148: # $client - File descriptor connected to client.
3149: # Returns
3150: # 0 - Requested to exit, caller should shut down.
3151: # 1 - Continue processing.
3152: #
3153: sub increment_user_value_handler {
3154: my ($cmd, $tail, $client) = @_;
3155:
3156: my $userinput = "$cmd:$tail";
3157:
3158: my ($udom,$uname,$namespace,$what) =split(/:/,$tail);
3159: if ($namespace ne 'roles') {
3160: chomp($what);
3161: my $hashref = &tie_user_hash($udom, $uname,
3162: $namespace, &GDBM_WRCREAT(),
3163: "P",$what);
3164: if ($hashref) {
3165: my @pairs=split(/\&/,$what);
3166: foreach my $pair (@pairs) {
3167: my ($key,$value)=split(/=/,$pair);
3168: $value = &unescape($value);
3169: # We could check that we have a number...
3170: if (! defined($value) || $value eq '') {
3171: $value = 1;
3172: }
3173: $hashref->{$key}+=$value;
3174: if ($namespace eq 'nohist_resourcetracker') {
3175: if ($hashref->{$key} < 0) {
3176: $hashref->{$key} = 0;
3177: }
3178: }
3179: }
3180: if (&untie_user_hash($hashref)) {
3181: &Reply( $client, "ok\n", $userinput);
3182: } else {
3183: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
3184: "while attempting inc\n", $userinput);
3185: }
3186: } else {
3187: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3188: "while attempting inc\n", $userinput);
3189: }
3190: } else {
3191: &Failure($client, "refused\n", $userinput);
3192: }
3193:
3194: return 1;
3195: }
3196: ®ister_handler("inc", \&increment_user_value_handler, 0, 1, 0);
3197:
3198: #
3199: # Put a new role for a user. Roles are LonCAPA's packaging of permissions.
3200: # Each 'role' a user has implies a set of permissions. Adding a new role
3201: # for a person grants the permissions packaged with that role
3202: # to that user when the role is selected.
3203: #
3204: # Parameters:
3205: # $cmd - The command string (rolesput).
3206: # $tail - The remainder of the request line. For rolesput this
3207: # consists of a colon separated list that contains:
3208: # The domain and user that is granting the role (logged).
3209: # The domain and user that is getting the role.
3210: # The roles being granted as a set of & separated pairs.
3211: # each pair a key value pair.
3212: # $client - File descriptor connected to the client.
3213: # Returns:
3214: # 0 - If the daemon should exit
3215: # 1 - To continue processing.
3216: #
3217: #
3218: sub roles_put_handler {
3219: my ($cmd, $tail, $client) = @_;
3220:
3221: my $userinput = "$cmd:$tail";
3222:
3223: my ( $exedom, $exeuser, $udom, $uname, $what) = split(/:/,$tail);
3224:
3225:
3226: my $namespace='roles';
3227: chomp($what);
3228: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3229: &GDBM_WRCREAT(), "P",
3230: "$exedom:$exeuser:$what");
3231: #
3232: # Log the attempt to set a role. The {}'s here ensure that the file
3233: # handle is open for the minimal amount of time. Since the flush
3234: # is done on close this improves the chances the log will be an un-
3235: # corrupted ordered thing.
3236: if ($hashref) {
3237: my $pass_entry = &get_auth_type($udom, $uname);
3238: my ($auth_type,$pwd) = split(/:/, $pass_entry);
3239: $auth_type = $auth_type.":";
3240: my @pairs=split(/\&/,$what);
3241: foreach my $pair (@pairs) {
3242: my ($key,$value)=split(/=/,$pair);
3243: &manage_permissions($key, $udom, $uname,
3244: $auth_type);
3245: $hashref->{$key}=$value;
3246: }
3247: if (&untie_user_hash($hashref)) {
3248: &Reply($client, "ok\n", $userinput);
3249: } else {
3250: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3251: "while attempting rolesput\n", $userinput);
3252: }
3253: } else {
3254: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3255: "while attempting rolesput\n", $userinput);
3256: }
3257: return 1;
3258: }
3259: ®ister_handler("rolesput", \&roles_put_handler, 1,1,0); # Encoded client only.
3260:
3261: #
3262: # Deletes (removes) a role for a user. This is equivalent to removing
3263: # a permissions package associated with the role from the user's profile.
3264: #
3265: # Parameters:
3266: # $cmd - The command (rolesdel)
3267: # $tail - The remainder of the request line. This consists
3268: # of:
3269: # The domain and user requesting the change (logged)
3270: # The domain and user being changed.
3271: # The roles being revoked. These are shipped to us
3272: # as a bunch of & separated role name keywords.
3273: # $client - The file handle open on the client.
3274: # Returns:
3275: # 1 - Continue processing
3276: # 0 - Exit.
3277: #
3278: sub roles_delete_handler {
3279: my ($cmd, $tail, $client) = @_;
3280:
3281: my $userinput = "$cmd:$tail";
3282:
3283: my ($exedom,$exeuser,$udom,$uname,$what)=split(/:/,$tail);
3284: &Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom.
3285: "what = ".$what);
3286: my $namespace='roles';
3287: chomp($what);
3288: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3289: &GDBM_WRCREAT(), "D",
3290: "$exedom:$exeuser:$what");
3291:
3292: if ($hashref) {
3293: my @rolekeys=split(/\&/,$what);
3294:
3295: foreach my $key (@rolekeys) {
3296: delete $hashref->{$key};
3297: }
3298: if (&untie_user_hash($hashref)) {
3299: &Reply($client, "ok\n", $userinput);
3300: } else {
3301: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3302: "while attempting rolesdel\n", $userinput);
3303: }
3304: } else {
3305: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3306: "while attempting rolesdel\n", $userinput);
3307: }
3308:
3309: return 1;
3310: }
3311: ®ister_handler("rolesdel", \&roles_delete_handler, 1,1, 0); # Encoded client only
3312:
3313: # Unencrypted get from a user's profile database. See
3314: # GetProfileEntryEncrypted for a version that does end-to-end encryption.
3315: # This function retrieves a keyed item from a specific named database in the
3316: # user's directory.
3317: #
3318: # Parameters:
3319: # $cmd - Command request keyword (get).
3320: # $tail - Tail of the command. This is a colon separated list
3321: # consisting of the domain and username that uniquely
3322: # identifies the profile,
3323: # The 'namespace' which selects the gdbm file to
3324: # do the lookup in,
3325: # & separated list of keys to lookup. Note that
3326: # the values are returned as an & separated list too.
3327: # $client - File descriptor open on the client.
3328: # Returns:
3329: # 1 - Continue processing.
3330: # 0 - Exit.
3331: #
3332: sub get_profile_entry {
3333: my ($cmd, $tail, $client) = @_;
3334:
3335: my $userinput= "$cmd:$tail";
3336:
3337: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
3338: chomp($what);
3339:
3340:
3341: my $replystring = read_profile($udom, $uname, $namespace, $what);
3342: my ($first) = split(/:/,$replystring);
3343: if($first ne "error") {
3344: &Reply($client, \$replystring, $userinput);
3345: } else {
3346: &Failure($client, $replystring." while attempting get\n", $userinput);
3347: }
3348: return 1;
3349:
3350:
3351: }
3352: ®ister_handler("get", \&get_profile_entry, 0,1,0);
3353:
3354: #
3355: # Process the encrypted get request. Note that the request is sent
3356: # in clear, but the reply is encrypted. This is a small covert channel:
3357: # information about the sensitive keys is given to the snooper. Just not
3358: # information about the values of the sensitive key. Hmm if I wanted to
3359: # know these I'd snoop for the egets. Get the profile item names from them
3360: # and then issue a get for them since there's no enforcement of the
3361: # requirement of an encrypted get for particular profile items. If I
3362: # were re-doing this, I'd force the request to be encrypted as well as the
3363: # reply. I'd also just enforce encrypted transactions for all gets since
3364: # that would prevent any covert channel snooping.
3365: #
3366: # Parameters:
3367: # $cmd - Command keyword of request (eget).
3368: # $tail - Tail of the command. See GetProfileEntry
# for more information about this.
3369: # $client - File open on the client.
3370: # Returns:
3371: # 1 - Continue processing
3372: # 0 - server should exit.
3373: sub get_profile_entry_encrypted {
3374: my ($cmd, $tail, $client) = @_;
3375:
3376: my $userinput = "$cmd:$tail";
3377:
3378: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
3379: chomp($what);
3380: my $qresult = read_profile($udom, $uname, $namespace, $what);
3381: my ($first) = split(/:/, $qresult);
3382: if($first ne "error") {
3383:
3384: if ($cipher) {
3385: my $cmdlength=length($qresult);
3386: $qresult.=" ";
3387: my $encqresult='';
3388: for(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
3389: $encqresult.= unpack("H16",
3390: $cipher->encrypt(substr($qresult,
3391: $encidx,
3392: 8)));
3393: }
3394: &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput);
3395: } else {
3396: &Failure( $client, "error:no_key\n", $userinput);
3397: }
3398: } else {
3399: &Failure($client, "$qresult while attempting eget\n", $userinput);
3400:
3401: }
3402:
3403: return 1;
3404: }
3405: ®ister_handler("eget", \&get_profile_entry_encrypted, 0, 1, 0);
3406:
3407: #
3408: # Deletes a key in a user profile database.
3409: #
3410: # Parameters:
3411: # $cmd - Command keyword (del).
3412: # $tail - Command tail. IN this case a colon
3413: # separated list containing:
3414: # The domain and user that identifies uniquely
3415: # the identity of the user.
3416: # The profile namespace (name of the profile
3417: # database file).
3418: # & separated list of keywords to delete.
3419: # $client - File open on client socket.
3420: # Returns:
3421: # 1 - Continue processing
3422: # 0 - Exit server.
3423: #
3424: #
3425: sub delete_profile_entry {
3426: my ($cmd, $tail, $client) = @_;
3427:
3428: my $userinput = "cmd:$tail";
3429:
3430: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
3431: chomp($what);
3432: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3433: &GDBM_WRCREAT(),
3434: "D",$what);
3435: if ($hashref) {
3436: my @keys=split(/\&/,$what);
3437: foreach my $key (@keys) {
3438: delete($hashref->{$key});
3439: }
3440: if (&untie_user_hash($hashref)) {
3441: &Reply($client, "ok\n", $userinput);
3442: } else {
3443: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3444: "while attempting del\n", $userinput);
3445: }
3446: } else {
3447: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3448: "while attempting del\n", $userinput);
3449: }
3450: return 1;
3451: }
3452: ®ister_handler("del", \&delete_profile_entry, 0, 1, 0);
3453:
3454: #
3455: # List the set of keys that are defined in a profile database file.
3456: # A successful reply from this will contain an & separated list of
3457: # the keys.
3458: # Parameters:
3459: # $cmd - Command request (keys).
3460: # $tail - Remainder of the request, a colon separated
3461: # list containing domain/user that identifies the
3462: # user being queried, and the database namespace
3463: # (database filename essentially).
3464: # $client - File open on the client.
3465: # Returns:
3466: # 1 - Continue processing.
3467: # 0 - Exit the server.
3468: #
3469: sub get_profile_keys {
3470: my ($cmd, $tail, $client) = @_;
3471:
3472: my $userinput = "$cmd:$tail";
3473:
3474: my ($udom,$uname,$namespace)=split(/:/,$tail);
3475: my $qresult='';
3476: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3477: &GDBM_READER());
3478: if ($hashref) {
3479: foreach my $key (keys %$hashref) {
3480: $qresult.="$key&";
3481: }
3482: if (&untie_user_hash($hashref)) {
3483: $qresult=~s/\&$//;
3484: &Reply($client, \$qresult, $userinput);
3485: } else {
3486: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3487: "while attempting keys\n", $userinput);
3488: }
3489: } else {
3490: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3491: "while attempting keys\n", $userinput);
3492: }
3493:
3494: return 1;
3495: }
3496: ®ister_handler("keys", \&get_profile_keys, 0, 1, 0);
3497:
3498: #
3499: # Dump the contents of a user profile database.
3500: # Note that this constitutes a very large covert channel too since
3501: # the dump will return sensitive information that is not encrypted.
3502: # The naive security assumption is that the session negotiation ensures
3503: # our client is trusted and I don't believe that's assured at present.
3504: # Sure want badly to go to ssl or tls. Of course if my peer isn't really
3505: # a LonCAPA node they could have negotiated an encryption key too so >sigh<.
3506: #
3507: # Parameters:
3508: # $cmd - The command request keyword (currentdump).
3509: # $tail - Remainder of the request, consisting of a colon
3510: # separated list that has the domain/username and
3511: # the namespace to dump (database file).
3512: # $client - file open on the remote client.
3513: # Returns:
3514: # 1 - Continue processing.
3515: # 0 - Exit the server.
3516: #
3517: sub dump_profile_database {
3518: my ($cmd, $tail, $client) = @_;
3519:
3520: my $res = LONCAPA::Lond::dump_profile_database($tail);
3521:
3522: if ($res =~ /^error:/) {
3523: Failure($client, \$res, "$cmd:$tail");
3524: } else {
3525: Reply($client, \$res, "$cmd:$tail");
3526: }
3527:
3528: return 1;
3529:
3530: #TODO remove
3531: my $userinput = "$cmd:$tail";
3532:
3533: my ($udom,$uname,$namespace) = split(/:/,$tail);
3534: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3535: &GDBM_READER());
3536: if ($hashref) {
3537: # Structure of %data:
3538: # $data{$symb}->{$parameter}=$value;
3539: # $data{$symb}->{'v.'.$parameter}=$version;
3540: # since $parameter will be unescaped, we do not
3541: # have to worry about silly parameter names...
3542:
3543: my $qresult='';
3544: my %data = (); # A hash of anonymous hashes..
3545: while (my ($key,$value) = each(%$hashref)) {
3546: my ($v,$symb,$param) = split(/:/,$key);
3547: next if ($v eq 'version' || $symb eq 'keys');
3548: next if (exists($data{$symb}) &&
3549: exists($data{$symb}->{$param}) &&
3550: $data{$symb}->{'v.'.$param} > $v);
3551: $data{$symb}->{$param}=$value;
3552: $data{$symb}->{'v.'.$param}=$v;
3553: }
3554: if (&untie_user_hash($hashref)) {
3555: while (my ($symb,$param_hash) = each(%data)) {
3556: while(my ($param,$value) = each (%$param_hash)){
3557: next if ($param =~ /^v\./); # Ignore versions...
3558: #
3559: # Just dump the symb=value pairs separated by &
3560: #
3561: $qresult.=$symb.':'.$param.'='.$value.'&';
3562: }
3563: }
3564: chop($qresult);
3565: &Reply($client , \$qresult, $userinput);
3566: } else {
3567: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3568: "while attempting currentdump\n", $userinput);
3569: }
3570: } else {
3571: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3572: "while attempting currentdump\n", $userinput);
3573: }
3574:
3575: return 1;
3576: }
3577: ®ister_handler("currentdump", \&dump_profile_database, 0, 1, 0);
3578:
3579: #
3580: # Dump a profile database with an optional regular expression
3581: # to match against the keys. In this dump, no effort is made
3582: # to separate symb from version information. Presumably the
3583: # databases that are dumped by this command are of a different
3584: # structure. Need to look at this and improve the documentation of
3585: # both this and the currentdump handler.
3586: # Parameters:
3587: # $cmd - The command keyword.
3588: # $tail - All of the characters after the $cmd:
3589: # These are expected to be a colon
3590: # separated list containing:
3591: # domain/user - identifying the user.
3592: # namespace - identifying the database.
3593: # regexp - optional regular expression
3594: # that is matched against
3595: # database keywords to do
3596: # selective dumps.
3597: # range - optional range of entries
3598: # e.g., 10-20 would return the
3599: # 10th to 19th items, etc.
3600: # $client - Channel open on the client.
3601: # Returns:
3602: # 1 - Continue processing.
3603: # Side effects:
3604: # response is written to $client.
3605: #
3606: sub dump_with_regexp {
3607: my ($cmd, $tail, $client) = @_;
3608:
3609: my $res = LONCAPA::Lond::dump_with_regexp($tail, $clientversion);
3610:
3611: if ($res =~ /^error:/) {
3612: Failure($client, \$res, "$cmd:$tail");
3613: } else {
3614: Reply($client, \$res, "$cmd:$tail");
3615: }
3616:
3617: return 1;
3618: }
3619: ®ister_handler("dump", \&dump_with_regexp, 0, 1, 0);
3620:
3621: # Store a set of key=value pairs associated with a versioned name.
3622: #
3623: # Parameters:
3624: # $cmd - Request command keyword.
3625: # $tail - Tail of the request. This is a colon
3626: # separated list containing:
3627: # domain/user - User and authentication domain.
3628: # namespace - Name of the database being modified
3629: # rid - Resource keyword to modify.
3630: # what - new value associated with rid.
3631: # laststore - (optional) version=timestamp
3632: # for most recent transaction for rid
3633: # in namespace, when cstore was called
3634: #
3635: # $client - Socket open on the client.
3636: #
3637: #
3638: # Returns:
3639: # 1 (keep on processing).
3640: # Side-Effects:
3641: # Writes to the client
3642: # Successful storage will cause either 'ok', or, if $laststore was included
3643: # in the tail of the request, and the version number for the last transaction
3644: # is larger than the version in $laststore, delay:$numtrans , where $numtrans
3645: # is the number of store evevnts recorded for rid in namespace since
3646: # lonnet::store() was called by the client.
3647: #
3648: sub store_handler {
3649: my ($cmd, $tail, $client) = @_;
3650:
3651: my $userinput = "$cmd:$tail";
3652: chomp($tail);
3653: my ($udom,$uname,$namespace,$rid,$what,$laststore) =split(/:/,$tail);
3654: if ($namespace ne 'roles') {
3655:
3656: my @pairs=split(/\&/,$what);
3657: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3658: &GDBM_WRCREAT(), "S",
3659: "$rid:$what");
3660: if ($hashref) {
3661: my $now = time;
3662: my $numtrans;
3663: if ($laststore) {
3664: my ($previousversion,$previoustime) = split(/\=/,$laststore);
3665: my ($lastversion,$lasttime) = (0,0);
3666: $lastversion = $hashref->{"version:$rid"};
3667: if ($lastversion) {
3668: $lasttime = $hashref->{"$lastversion:$rid:timestamp"};
3669: }
3670: if (($previousversion) && ($previousversion !~ /\D/)) {
3671: if (($lastversion > $previousversion) && ($lasttime >= $previoustime)) {
3672: $numtrans = $lastversion - $previousversion;
3673: }
3674: } elsif ($lastversion) {
3675: $numtrans = $lastversion;
3676: }
3677: if ($numtrans) {
3678: $numtrans =~ s/D//g;
3679: }
3680: }
3681: $hashref->{"version:$rid"}++;
3682: my $version=$hashref->{"version:$rid"};
3683: my $allkeys='';
3684: foreach my $pair (@pairs) {
3685: my ($key,$value)=split(/=/,$pair);
3686: $allkeys.=$key.':';
3687: $hashref->{"$version:$rid:$key"}=$value;
3688: }
3689: $hashref->{"$version:$rid:timestamp"}=$now;
3690: $allkeys.='timestamp';
3691: $hashref->{"$version:keys:$rid"}=$allkeys;
3692: if (&untie_user_hash($hashref)) {
3693: my $msg = 'ok';
3694: if ($numtrans) {
3695: $msg = 'delay:'.$numtrans;
3696: }
3697: &Reply($client, "$msg\n", $userinput);
3698: } else {
3699: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3700: "while attempting store\n", $userinput);
3701: }
3702: } else {
3703: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3704: "while attempting store\n", $userinput);
3705: }
3706: } else {
3707: &Failure($client, "refused\n", $userinput);
3708: }
3709:
3710: return 1;
3711: }
3712: ®ister_handler("store", \&store_handler, 0, 1, 0);
3713:
3714: # Modify a set of key=value pairs associated with a versioned name.
3715: #
3716: # Parameters:
3717: # $cmd - Request command keyword.
3718: # $tail - Tail of the request. This is a colon
3719: # separated list containing:
3720: # domain/user - User and authentication domain.
3721: # namespace - Name of the database being modified
3722: # rid - Resource keyword to modify.
3723: # v - Version item to modify
3724: # what - new value associated with rid.
3725: #
3726: # $client - Socket open on the client.
3727: #
3728: #
3729: # Returns:
3730: # 1 (keep on processing).
3731: # Side-Effects:
3732: # Writes to the client
3733: sub putstore_handler {
3734: my ($cmd, $tail, $client) = @_;
3735:
3736: my $userinput = "$cmd:$tail";
3737:
3738: my ($udom,$uname,$namespace,$rid,$v,$what) =split(/:/,$tail);
3739: if ($namespace ne 'roles') {
3740:
3741: chomp($what);
3742: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3743: &GDBM_WRCREAT(), "M",
3744: "$rid:$v:$what");
3745: if ($hashref) {
3746: my $now = time;
3747: my %data = &hash_extract($what);
3748: my @allkeys;
3749: while (my($key,$value) = each(%data)) {
3750: push(@allkeys,$key);
3751: $hashref->{"$v:$rid:$key"} = $value;
3752: }
3753: my $allkeys = join(':',@allkeys);
3754: $hashref->{"$v:keys:$rid"}=$allkeys;
3755:
3756: if (&untie_user_hash($hashref)) {
3757: &Reply($client, "ok\n", $userinput);
3758: } else {
3759: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3760: "while attempting store\n", $userinput);
3761: }
3762: } else {
3763: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3764: "while attempting store\n", $userinput);
3765: }
3766: } else {
3767: &Failure($client, "refused\n", $userinput);
3768: }
3769:
3770: return 1;
3771: }
3772: ®ister_handler("putstore", \&putstore_handler, 0, 1, 0);
3773:
3774: sub hash_extract {
3775: my ($str)=@_;
3776: my %hash;
3777: foreach my $pair (split(/\&/,$str)) {
3778: my ($key,$value)=split(/=/,$pair);
3779: $hash{$key}=$value;
3780: }
3781: return (%hash);
3782: }
3783: sub hash_to_str {
3784: my ($hash_ref)=@_;
3785: my $str;
3786: foreach my $key (keys(%$hash_ref)) {
3787: $str.=$key.'='.$hash_ref->{$key}.'&';
3788: }
3789: $str=~s/\&$//;
3790: return $str;
3791: }
3792:
3793: #
3794: # Dump out all versions of a resource that has key=value pairs associated
3795: # with it for each version. These resources are built up via the store
3796: # command.
3797: #
3798: # Parameters:
3799: # $cmd - Command keyword.
3800: # $tail - Remainder of the request which consists of:
3801: # domain/user - User and auth. domain.
3802: # namespace - name of resource database.
3803: # rid - Resource id.
3804: # $client - socket open on the client.
3805: #
3806: # Returns:
3807: # 1 indicating the caller should not yet exit.
3808: # Side-effects:
3809: # Writes a reply to the client.
3810: # The reply is a string of the following shape:
3811: # version=current&version:keys=k1:k2...&1:k1=v1&1:k2=v2...
3812: # Where the 1 above represents version 1.
3813: # this continues for all pairs of keys in all versions.
3814: #
3815: #
3816: #
3817: #
3818: sub restore_handler {
3819: my ($cmd, $tail, $client) = @_;
3820:
3821: my $userinput = "$cmd:$tail"; # Only used for logging purposes.
3822: my ($udom,$uname,$namespace,$rid) = split(/:/,$tail);
3823: $namespace=~s/\//\_/g;
3824: $namespace = &LONCAPA::clean_username($namespace);
3825:
3826: chomp($rid);
3827: my $qresult='';
3828: my $hashref = &tie_user_hash($udom, $uname, $namespace, &GDBM_READER());
3829: if ($hashref) {
3830: my $version=$hashref->{"version:$rid"};
3831: $qresult.="version=$version&";
3832: my $scope;
3833: for ($scope=1;$scope<=$version;$scope++) {
3834: my $vkeys=$hashref->{"$scope:keys:$rid"};
3835: my @keys=split(/:/,$vkeys);
3836: my $key;
3837: $qresult.="$scope:keys=$vkeys&";
3838: foreach $key (@keys) {
3839: $qresult.="$scope:$key=".$hashref->{"$scope:$rid:$key"}."&";
3840: }
3841: }
3842: if (&untie_user_hash($hashref)) {
3843: $qresult=~s/\&$//;
3844: &Reply( $client, \$qresult, $userinput);
3845: } else {
3846: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3847: "while attempting restore\n", $userinput);
3848: }
3849: } else {
3850: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3851: "while attempting restore\n", $userinput);
3852: }
3853:
3854: return 1;
3855:
3856:
3857: }
3858: ®ister_handler("restore", \&restore_handler, 0,1,0);
3859:
3860: #
3861: # Add a chat message to a synchronous discussion board.
3862: #
3863: # Parameters:
3864: # $cmd - Request keyword.
3865: # $tail - Tail of the command. A colon separated list
3866: # containing:
3867: # cdom - Domain on which the chat board lives
3868: # cnum - Course containing the chat board.
3869: # newpost - Body of the posting.
3870: # group - Optional group, if chat board is only
3871: # accessible in a group within the course
3872: # $client - Socket open on the client.
3873: # Returns:
3874: # 1 - Indicating caller should keep on processing.
3875: #
3876: # Side-effects:
3877: # writes a reply to the client.
3878: #
3879: #
3880: sub send_chat_handler {
3881: my ($cmd, $tail, $client) = @_;
3882:
3883:
3884: my $userinput = "$cmd:$tail";
3885:
3886: my ($cdom,$cnum,$newpost,$group)=split(/\:/,$tail);
3887: &chat_add($cdom,$cnum,$newpost,$group);
3888: &Reply($client, "ok\n", $userinput);
3889:
3890: return 1;
3891: }
3892: ®ister_handler("chatsend", \&send_chat_handler, 0, 1, 0);
3893:
3894: #
3895: # Retrieve the set of chat messages from a discussion board.
3896: #
3897: # Parameters:
3898: # $cmd - Command keyword that initiated the request.
3899: # $tail - Remainder of the request after the command
3900: # keyword. In this case a colon separated list of
3901: # chat domain - Which discussion board.
3902: # chat id - Discussion thread(?)
3903: # domain/user - Authentication domain and username
3904: # of the requesting person.
3905: # group - Optional course group containing
3906: # the board.
3907: # $client - Socket open on the client program.
3908: # Returns:
3909: # 1 - continue processing
3910: # Side effects:
3911: # Response is written to the client.
3912: #
3913: sub retrieve_chat_handler {
3914: my ($cmd, $tail, $client) = @_;
3915:
3916:
3917: my $userinput = "$cmd:$tail";
3918:
3919: my ($cdom,$cnum,$udom,$uname,$group)=split(/\:/,$tail);
3920: my $reply='';
3921: foreach (&get_chat($cdom,$cnum,$udom,$uname,$group)) {
3922: $reply.=&escape($_).':';
3923: }
3924: $reply=~s/\:$//;
3925: &Reply($client, \$reply, $userinput);
3926:
3927:
3928: return 1;
3929: }
3930: ®ister_handler("chatretr", \&retrieve_chat_handler, 0, 1, 0);
3931:
3932: #
3933: # Initiate a query of an sql database. SQL query repsonses get put in
3934: # a file for later retrieval. This prevents sql query results from
3935: # bottlenecking the system. Note that with loncnew, perhaps this is
3936: # less of an issue since multiple outstanding requests can be concurrently
3937: # serviced.
3938: #
3939: # Parameters:
3940: # $cmd - COmmand keyword that initiated the request.
3941: # $tail - Remainder of the command after the keyword.
3942: # For this function, this consists of a query and
3943: # 3 arguments that are self-documentingly labelled
3944: # in the original arg1, arg2, arg3.
3945: # $client - Socket open on the client.
3946: # Return:
3947: # 1 - Indicating processing should continue.
3948: # Side-effects:
3949: # a reply is written to $client.
3950: #
3951: sub send_query_handler {
3952: my ($cmd, $tail, $client) = @_;
3953:
3954:
3955: my $userinput = "$cmd:$tail";
3956:
3957: my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail);
3958: $query=~s/\n*$//g;
3959: &Reply($client, "". &sql_reply("$clientname\&$query".
3960: "\&$arg1"."\&$arg2"."\&$arg3")."\n",
3961: $userinput);
3962:
3963: return 1;
3964: }
3965: ®ister_handler("querysend", \&send_query_handler, 0, 1, 0);
3966:
3967: #
3968: # Add a reply to an sql query. SQL queries are done asyncrhonously.
3969: # The query is submitted via a "querysend" transaction.
3970: # There it is passed on to the lonsql daemon, queued and issued to
3971: # mysql.
3972: # This transaction is invoked when the sql transaction is complete
3973: # it stores the query results in flie and indicates query completion.
3974: # presumably local software then fetches this response... I'm guessing
3975: # the sequence is: lonc does a querysend, we ask lonsql to do it.
3976: # lonsql on completion of the query interacts with the lond of our
3977: # client to do a query reply storing two files:
3978: # - id - The results of the query.
3979: # - id.end - Indicating the transaction completed.
3980: # NOTE: id is a unique id assigned to the query and querysend time.
3981: # Parameters:
3982: # $cmd - Command keyword that initiated this request.
3983: # $tail - Remainder of the tail. In this case that's a colon
3984: # separated list containing the query Id and the
3985: # results of the query.
3986: # $client - Socket open on the client.
3987: # Return:
3988: # 1 - Indicating that we should continue processing.
3989: # Side effects:
3990: # ok written to the client.
3991: #
3992: sub reply_query_handler {
3993: my ($cmd, $tail, $client) = @_;
3994:
3995:
3996: my $userinput = "$cmd:$tail";
3997:
3998: my ($id,$reply)=split(/:/,$tail);
3999: my $store;
4000: my $execdir=$perlvar{'lonDaemons'};
4001: if ($store=IO::File->new(">$execdir/tmp/$id")) {
4002: $reply=~s/\&/\n/g;
4003: print $store $reply;
4004: close $store;
4005: my $store2=IO::File->new(">$execdir/tmp/$id.end");
4006: print $store2 "done\n";
4007: close $store2;
4008: &Reply($client, "ok\n", $userinput);
4009: } else {
4010: &Failure($client, "error: ".($!+0)
4011: ." IO::File->new Failed ".
4012: "while attempting queryreply\n", $userinput);
4013: }
4014:
4015:
4016: return 1;
4017: }
4018: ®ister_handler("queryreply", \&reply_query_handler, 0, 1, 0);
4019:
4020: #
4021: # Process the courseidput request. Not quite sure what this means
4022: # at the system level sense. It appears a gdbm file in the
4023: # /home/httpd/lonUsers/$domain/nohist_courseids is tied and
4024: # a set of entries made in that database.
4025: #
4026: # Parameters:
4027: # $cmd - The command keyword that initiated this request.
4028: # $tail - Tail of the command. In this case consists of a colon
4029: # separated list contaning the domain to apply this to and
4030: # an ampersand separated list of keyword=value pairs.
4031: # Each value is a colon separated list that includes:
4032: # description, institutional code and course owner.
4033: # For backward compatibility with versions included
4034: # in LON-CAPA 1.1.X (and earlier) and 1.2.X, institutional
4035: # code and/or course owner are preserved from the existing
4036: # record when writing a new record in response to 1.1 or
4037: # 1.2 implementations of lonnet::flushcourselogs().
4038: #
4039: # $client - Socket open on the client.
4040: # Returns:
4041: # 1 - indicating that processing should continue
4042: #
4043: # Side effects:
4044: # reply is written to the client.
4045: #
4046: sub put_course_id_handler {
4047: my ($cmd, $tail, $client) = @_;
4048:
4049:
4050: my $userinput = "$cmd:$tail";
4051:
4052: my ($udom, $what) = split(/:/, $tail,2);
4053: chomp($what);
4054: my $now=time;
4055: my @pairs=split(/\&/,$what);
4056:
4057: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
4058: if ($hashref) {
4059: foreach my $pair (@pairs) {
4060: my ($key,$courseinfo) = split(/=/,$pair,2);
4061: $courseinfo =~ s/=/:/g;
4062: if (defined($hashref->{$key})) {
4063: my $value = &Apache::lonnet::thaw_unescape($hashref->{$key});
4064: if (ref($value) eq 'HASH') {
4065: my @items = ('description','inst_code','owner','type');
4066: my @new_items = split(/:/,$courseinfo,-1);
4067: my %storehash;
4068: for (my $i=0; $i<@new_items; $i++) {
4069: $storehash{$items[$i]} = &unescape($new_items[$i]);
4070: }
4071: $hashref->{$key} =
4072: &Apache::lonnet::freeze_escape(\%storehash);
4073: my $unesc_key = &unescape($key);
4074: $hashref->{&escape('lasttime:'.$unesc_key)} = $now;
4075: next;
4076: }
4077: }
4078: my @current_items = split(/:/,$hashref->{$key},-1);
4079: shift(@current_items); # remove description
4080: pop(@current_items); # remove last access
4081: my $numcurrent = scalar(@current_items);
4082: if ($numcurrent > 3) {
4083: $numcurrent = 3;
4084: }
4085: my @new_items = split(/:/,$courseinfo,-1);
4086: my $numnew = scalar(@new_items);
4087: if ($numcurrent > 0) {
4088: if ($numnew <= $numcurrent) { # flushcourselogs() from pre 2.2
4089: for (my $j=$numcurrent-$numnew; $j>=0; $j--) {
4090: $courseinfo .= ':'.$current_items[$numcurrent-$j-1];
4091: }
4092: }
4093: }
4094: $hashref->{$key}=$courseinfo.':'.$now;
4095: }
4096: if (&untie_domain_hash($hashref)) {
4097: &Reply( $client, "ok\n", $userinput);
4098: } else {
4099: &Failure($client, "error: ".($!+0)
4100: ." untie(GDBM) Failed ".
4101: "while attempting courseidput\n", $userinput);
4102: }
4103: } else {
4104: &Failure($client, "error: ".($!+0)
4105: ." tie(GDBM) Failed ".
4106: "while attempting courseidput\n", $userinput);
4107: }
4108:
4109: return 1;
4110: }
4111: ®ister_handler("courseidput", \&put_course_id_handler, 0, 1, 0);
4112:
4113: sub put_course_id_hash_handler {
4114: my ($cmd, $tail, $client) = @_;
4115: my $userinput = "$cmd:$tail";
4116: my ($udom,$mode,$what) = split(/:/, $tail,3);
4117: chomp($what);
4118: my $now=time;
4119: my @pairs=split(/\&/,$what);
4120: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
4121: if ($hashref) {
4122: foreach my $pair (@pairs) {
4123: my ($key,$value)=split(/=/,$pair);
4124: my $unesc_key = &unescape($key);
4125: if ($mode ne 'timeonly') {
4126: if (!defined($hashref->{&escape('lasttime:'.$unesc_key)})) {
4127: my $curritems = &Apache::lonnet::thaw_unescape($key);
4128: if (ref($curritems) ne 'HASH') {
4129: my @current_items = split(/:/,$hashref->{$key},-1);
4130: my $lasttime = pop(@current_items);
4131: $hashref->{&escape('lasttime:'.$unesc_key)} = $lasttime;
4132: } else {
4133: $hashref->{&escape('lasttime:'.$unesc_key)} = '';
4134: }
4135: }
4136: $hashref->{$key} = $value;
4137: }
4138: if ($mode ne 'notime') {
4139: $hashref->{&escape('lasttime:'.$unesc_key)} = $now;
4140: }
4141: }
4142: if (&untie_domain_hash($hashref)) {
4143: &Reply($client, "ok\n", $userinput);
4144: } else {
4145: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4146: "while attempting courseidputhash\n", $userinput);
4147: }
4148: } else {
4149: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4150: "while attempting courseidputhash\n", $userinput);
4151: }
4152: return 1;
4153: }
4154: ®ister_handler("courseidputhash", \&put_course_id_hash_handler, 0, 1, 0);
4155:
4156: # Retrieves the value of a course id resource keyword pattern
4157: # defined since a starting date. Both the starting date and the
4158: # keyword pattern are optional. If the starting date is not supplied it
4159: # is treated as the beginning of time. If the pattern is not found,
4160: # it is treatred as "." matching everything.
4161: #
4162: # Parameters:
4163: # $cmd - Command keyword that resulted in us being dispatched.
4164: # $tail - The remainder of the command that, in this case, consists
4165: # of a colon separated list of:
4166: # domain - The domain in which the course database is
4167: # defined.
4168: # since - Optional parameter describing the minimum
4169: # time of definition(?) of the resources that
4170: # will match the dump.
4171: # description - regular expression that is used to filter
4172: # the dump. Only keywords matching this regexp
4173: # will be used.
4174: # institutional code - optional supplied code to filter
4175: # the dump. Only courses with an institutional code
4176: # that match the supplied code will be returned.
4177: # owner - optional supplied username and domain of owner to
4178: # filter the dump. Only courses for which the course
4179: # owner matches the supplied username and/or domain
4180: # will be returned. Pre-2.2.0 legacy entries from
4181: # nohist_courseiddump will only contain usernames.
4182: # type - optional parameter for selection
4183: # regexp_ok - if 1 or -1 allow the supplied institutional code
4184: # filter to behave as a regular expression:
4185: # 1 will not exclude the course if the instcode matches the RE
4186: # -1 will exclude the course if the instcode matches the RE
4187: # rtn_as_hash - whether to return the information available for
4188: # each matched item as a frozen hash of all
4189: # key, value pairs in the item's hash, or as a
4190: # colon-separated list of (in order) description,
4191: # institutional code, and course owner.
4192: # selfenrollonly - filter by courses allowing self-enrollment
4193: # now or in the future (selfenrollonly = 1).
4194: # catfilter - filter by course category, assigned to a course
4195: # using manually defined categories (i.e., not
4196: # self-cataloging based on on institutional code).
4197: # showhidden - include course in results even if course
4198: # was set to be excluded from course catalog (DC only).
4199: # caller - if set to 'coursecatalog', courses set to be hidden
4200: # from course catalog will be excluded from results (unless
4201: # overridden by "showhidden".
4202: # cloner - escaped username:domain of course cloner (if picking course to
4203: # clone).
4204: # cc_clone_list - escaped comma separated list of courses for which
4205: # course cloner has active CC role (and so can clone
4206: # automatically).
4207: # cloneonly - filter by courses for which cloner has rights to clone.
4208: # createdbefore - include courses for which creation date preceeded this date.
4209: # createdafter - include courses for which creation date followed this date.
4210: # creationcontext - include courses created in specified context
4211: #
4212: # domcloner - flag to indicate if user can create CCs in course's domain.
4213: # If so, ability to clone course is automatic.
4214: # hasuniquecode - filter by courses for which a six character unique code has
4215: # been set.
4216: #
4217: # $client - The socket open on the client.
4218: # Returns:
4219: # 1 - Continue processing.
4220: # Side Effects:
4221: # a reply is written to $client.
4222: sub dump_course_id_handler {
4223: my ($cmd, $tail, $client) = @_;
4224:
4225: my $res = LONCAPA::Lond::dump_course_id_handler($tail);
4226: if ($res =~ /^error:/) {
4227: Failure($client, \$res, "$cmd:$tail");
4228: } else {
4229: Reply($client, \$res, "$cmd:$tail");
4230: }
4231:
4232: return 1;
4233:
4234: #TODO remove
4235: my $userinput = "$cmd:$tail";
4236:
4237: my ($udom,$since,$description,$instcodefilter,$ownerfilter,$coursefilter,
4238: $typefilter,$regexp_ok,$rtn_as_hash,$selfenrollonly,$catfilter,$showhidden,
4239: $caller,$cloner,$cc_clone_list,$cloneonly,$createdbefore,$createdafter,
4240: $creationcontext,$domcloner,$hasuniquecode) =split(/:/,$tail);
4241: my $now = time;
4242: my ($cloneruname,$clonerudom,%cc_clone);
4243: if (defined($description)) {
4244: $description=&unescape($description);
4245: } else {
4246: $description='.';
4247: }
4248: if (defined($instcodefilter)) {
4249: $instcodefilter=&unescape($instcodefilter);
4250: } else {
4251: $instcodefilter='.';
4252: }
4253: my ($ownerunamefilter,$ownerdomfilter);
4254: if (defined($ownerfilter)) {
4255: $ownerfilter=&unescape($ownerfilter);
4256: if ($ownerfilter ne '.' && defined($ownerfilter)) {
4257: if ($ownerfilter =~ /^([^:]*):([^:]*)$/) {
4258: $ownerunamefilter = $1;
4259: $ownerdomfilter = $2;
4260: } else {
4261: $ownerunamefilter = $ownerfilter;
4262: $ownerdomfilter = '';
4263: }
4264: }
4265: } else {
4266: $ownerfilter='.';
4267: }
4268:
4269: if (defined($coursefilter)) {
4270: $coursefilter=&unescape($coursefilter);
4271: } else {
4272: $coursefilter='.';
4273: }
4274: if (defined($typefilter)) {
4275: $typefilter=&unescape($typefilter);
4276: } else {
4277: $typefilter='.';
4278: }
4279: if (defined($regexp_ok)) {
4280: $regexp_ok=&unescape($regexp_ok);
4281: }
4282: if (defined($catfilter)) {
4283: $catfilter=&unescape($catfilter);
4284: }
4285: if (defined($cloner)) {
4286: $cloner = &unescape($cloner);
4287: ($cloneruname,$clonerudom) = ($cloner =~ /^($LONCAPA::match_username):($LONCAPA::match_domain)$/);
4288: }
4289: if (defined($cc_clone_list)) {
4290: $cc_clone_list = &unescape($cc_clone_list);
4291: my @cc_cloners = split('&',$cc_clone_list);
4292: foreach my $cid (@cc_cloners) {
4293: my ($clonedom,$clonenum) = split(':',$cid);
4294: next if ($clonedom ne $udom);
4295: $cc_clone{$clonedom.'_'.$clonenum} = 1;
4296: }
4297: }
4298: if ($createdbefore ne '') {
4299: $createdbefore = &unescape($createdbefore);
4300: } else {
4301: $createdbefore = 0;
4302: }
4303: if ($createdafter ne '') {
4304: $createdafter = &unescape($createdafter);
4305: } else {
4306: $createdafter = 0;
4307: }
4308: if ($creationcontext ne '') {
4309: $creationcontext = &unescape($creationcontext);
4310: } else {
4311: $creationcontext = '.';
4312: }
4313: unless ($hasuniquecode) {
4314: $hasuniquecode = '.';
4315: }
4316: my $unpack = 1;
4317: if ($description eq '.' && $instcodefilter eq '.' && $ownerfilter eq '.' &&
4318: $typefilter eq '.') {
4319: $unpack = 0;
4320: }
4321: if (!defined($since)) { $since=0; }
4322: my $qresult='';
4323: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
4324: if ($hashref) {
4325: while (my ($key,$value) = each(%$hashref)) {
4326: my ($unesc_key,$lasttime_key,$lasttime,$is_hash,%val,
4327: %unesc_val,$selfenroll_end,$selfenroll_types,$created,
4328: $context);
4329: $unesc_key = &unescape($key);
4330: if ($unesc_key =~ /^lasttime:/) {
4331: next;
4332: } else {
4333: $lasttime_key = &escape('lasttime:'.$unesc_key);
4334: }
4335: if ($hashref->{$lasttime_key} ne '') {
4336: $lasttime = $hashref->{$lasttime_key};
4337: next if ($lasttime<$since);
4338: }
4339: my ($canclone,$valchange);
4340: my $items = &Apache::lonnet::thaw_unescape($value);
4341: if (ref($items) eq 'HASH') {
4342: if ($hashref->{$lasttime_key} eq '') {
4343: next if ($since > 1);
4344: }
4345: $is_hash = 1;
4346: if ($domcloner) {
4347: $canclone = 1;
4348: } elsif (defined($clonerudom)) {
4349: if ($items->{'cloners'}) {
4350: my @cloneable = split(',',$items->{'cloners'});
4351: if (@cloneable) {
4352: if (grep(/^\*$/,@cloneable)) {
4353: $canclone = 1;
4354: } elsif (grep(/^\*:\Q$clonerudom\E$/,@cloneable)) {
4355: $canclone = 1;
4356: } elsif (grep(/^\Q$cloneruname\E:\Q$clonerudom\E$/,@cloneable)) {
4357: $canclone = 1;
4358: }
4359: }
4360: unless ($canclone) {
4361: if ($cloneruname ne '' && $clonerudom ne '') {
4362: if ($cc_clone{$unesc_key}) {
4363: $canclone = 1;
4364: $items->{'cloners'} .= ','.$cloneruname.':'.
4365: $clonerudom;
4366: $valchange = 1;
4367: }
4368: }
4369: }
4370: } elsif (defined($cloneruname)) {
4371: if ($cc_clone{$unesc_key}) {
4372: $canclone = 1;
4373: $items->{'cloners'} = $cloneruname.':'.$clonerudom;
4374: $valchange = 1;
4375: }
4376: unless ($canclone) {
4377: if ($items->{'owner'} =~ /:/) {
4378: if ($items->{'owner'} eq $cloner) {
4379: $canclone = 1;
4380: }
4381: } elsif ($cloner eq $items->{'owner'}.':'.$udom) {
4382: $canclone = 1;
4383: }
4384: if ($canclone) {
4385: $items->{'cloners'} = $cloneruname.':'.$clonerudom;
4386: $valchange = 1;
4387: }
4388: }
4389: }
4390: }
4391: if ($unpack || !$rtn_as_hash) {
4392: $unesc_val{'descr'} = $items->{'description'};
4393: $unesc_val{'inst_code'} = $items->{'inst_code'};
4394: $unesc_val{'owner'} = $items->{'owner'};
4395: $unesc_val{'type'} = $items->{'type'};
4396: $unesc_val{'cloners'} = $items->{'cloners'};
4397: $unesc_val{'created'} = $items->{'created'};
4398: $unesc_val{'context'} = $items->{'context'};
4399: }
4400: $selfenroll_types = $items->{'selfenroll_types'};
4401: $selfenroll_end = $items->{'selfenroll_end_date'};
4402: $created = $items->{'created'};
4403: $context = $items->{'context'};
4404: if ($hasuniquecode ne '.') {
4405: next unless ($items->{'uniquecode'});
4406: }
4407: if ($selfenrollonly) {
4408: next if (!$selfenroll_types);
4409: if (($selfenroll_end > 0) && ($selfenroll_end <= $now)) {
4410: next;
4411: }
4412: }
4413: if ($creationcontext ne '.') {
4414: next if (($context ne '') && ($context ne $creationcontext));
4415: }
4416: if ($createdbefore > 0) {
4417: next if (($created eq '') || ($created > $createdbefore));
4418: }
4419: if ($createdafter > 0) {
4420: next if (($created eq '') || ($created <= $createdafter));
4421: }
4422: if ($catfilter ne '') {
4423: next if ($items->{'categories'} eq '');
4424: my @categories = split('&',$items->{'categories'});
4425: next if (@categories == 0);
4426: my @subcats = split('&',$catfilter);
4427: my $matchcat = 0;
4428: foreach my $cat (@categories) {
4429: if (grep(/^\Q$cat\E$/,@subcats)) {
4430: $matchcat = 1;
4431: last;
4432: }
4433: }
4434: next if (!$matchcat);
4435: }
4436: if ($caller eq 'coursecatalog') {
4437: if ($items->{'hidefromcat'} eq 'yes') {
4438: next if !$showhidden;
4439: }
4440: }
4441: } else {
4442: next if ($catfilter ne '');
4443: next if ($selfenrollonly);
4444: next if ($createdbefore || $createdafter);
4445: next if ($creationcontext ne '.');
4446: if ((defined($clonerudom)) && (defined($cloneruname))) {
4447: if ($cc_clone{$unesc_key}) {
4448: $canclone = 1;
4449: $val{'cloners'} = &escape($cloneruname.':'.$clonerudom);
4450: }
4451: }
4452: $is_hash = 0;
4453: my @courseitems = split(/:/,$value);
4454: $lasttime = pop(@courseitems);
4455: if ($hashref->{$lasttime_key} eq '') {
4456: next if ($lasttime<$since);
4457: }
4458: ($val{'descr'},$val{'inst_code'},$val{'owner'},$val{'type'}) = @courseitems;
4459: }
4460: if ($cloneonly) {
4461: next unless ($canclone);
4462: }
4463: my $match = 1;
4464: if ($description ne '.') {
4465: if (!$is_hash) {
4466: $unesc_val{'descr'} = &unescape($val{'descr'});
4467: }
4468: if (eval{$unesc_val{'descr'} !~ /\Q$description\E/i}) {
4469: $match = 0;
4470: }
4471: }
4472: if ($instcodefilter ne '.') {
4473: if (!$is_hash) {
4474: $unesc_val{'inst_code'} = &unescape($val{'inst_code'});
4475: }
4476: if ($regexp_ok == 1) {
4477: if (eval{$unesc_val{'inst_code'} !~ /$instcodefilter/}) {
4478: $match = 0;
4479: }
4480: } elsif ($regexp_ok == -1) {
4481: if (eval{$unesc_val{'inst_code'} =~ /$instcodefilter/}) {
4482: $match = 0;
4483: }
4484: } else {
4485: if (eval{$unesc_val{'inst_code'} !~ /\Q$instcodefilter\E/i}) {
4486: $match = 0;
4487: }
4488: }
4489: }
4490: if ($ownerfilter ne '.') {
4491: if (!$is_hash) {
4492: $unesc_val{'owner'} = &unescape($val{'owner'});
4493: }
4494: if (($ownerunamefilter ne '') && ($ownerdomfilter ne '')) {
4495: if ($unesc_val{'owner'} =~ /:/) {
4496: if (eval{$unesc_val{'owner'} !~
4497: /\Q$ownerunamefilter\E:\Q$ownerdomfilter\E$/i}) {
4498: $match = 0;
4499: }
4500: } else {
4501: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) {
4502: $match = 0;
4503: }
4504: }
4505: } elsif ($ownerunamefilter ne '') {
4506: if ($unesc_val{'owner'} =~ /:/) {
4507: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E:[^:]+$/i}) {
4508: $match = 0;
4509: }
4510: } else {
4511: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) {
4512: $match = 0;
4513: }
4514: }
4515: } elsif ($ownerdomfilter ne '') {
4516: if ($unesc_val{'owner'} =~ /:/) {
4517: if (eval{$unesc_val{'owner'} !~ /^[^:]+:\Q$ownerdomfilter\E/}) {
4518: $match = 0;
4519: }
4520: } else {
4521: if ($ownerdomfilter ne $udom) {
4522: $match = 0;
4523: }
4524: }
4525: }
4526: }
4527: if ($coursefilter ne '.') {
4528: if (eval{$unesc_key !~ /^$udom(_)\Q$coursefilter\E$/}) {
4529: $match = 0;
4530: }
4531: }
4532: if ($typefilter ne '.') {
4533: if (!$is_hash) {
4534: $unesc_val{'type'} = &unescape($val{'type'});
4535: }
4536: if ($unesc_val{'type'} eq '') {
4537: if ($typefilter ne 'Course') {
4538: $match = 0;
4539: }
4540: } else {
4541: if (eval{$unesc_val{'type'} !~ /^\Q$typefilter\E$/}) {
4542: $match = 0;
4543: }
4544: }
4545: }
4546: if ($match == 1) {
4547: if ($rtn_as_hash) {
4548: if ($is_hash) {
4549: if ($valchange) {
4550: my $newvalue = &Apache::lonnet::freeze_escape($items);
4551: $qresult.=$key.'='.$newvalue.'&';
4552: } else {
4553: $qresult.=$key.'='.$value.'&';
4554: }
4555: } else {
4556: my %rtnhash = ( 'description' => &unescape($val{'descr'}),
4557: 'inst_code' => &unescape($val{'inst_code'}),
4558: 'owner' => &unescape($val{'owner'}),
4559: 'type' => &unescape($val{'type'}),
4560: 'cloners' => &unescape($val{'cloners'}),
4561: );
4562: my $items = &Apache::lonnet::freeze_escape(\%rtnhash);
4563: $qresult.=$key.'='.$items.'&';
4564: }
4565: } else {
4566: if ($is_hash) {
4567: $qresult .= $key.'='.&escape($unesc_val{'descr'}).':'.
4568: &escape($unesc_val{'inst_code'}).':'.
4569: &escape($unesc_val{'owner'}).'&';
4570: } else {
4571: $qresult .= $key.'='.$val{'descr'}.':'.$val{'inst_code'}.
4572: ':'.$val{'owner'}.'&';
4573: }
4574: }
4575: }
4576: }
4577: if (&untie_domain_hash($hashref)) {
4578: chop($qresult);
4579: &Reply($client, \$qresult, $userinput);
4580: } else {
4581: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4582: "while attempting courseiddump\n", $userinput);
4583: }
4584: } else {
4585: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4586: "while attempting courseiddump\n", $userinput);
4587: }
4588: return 1;
4589: }
4590: ®ister_handler("courseiddump", \&dump_course_id_handler, 0, 1, 0);
4591:
4592: sub course_lastaccess_handler {
4593: my ($cmd, $tail, $client) = @_;
4594: my $userinput = "$cmd:$tail";
4595: my ($cdom,$cnum) = split(':',$tail);
4596: my (%lastaccess,$qresult);
4597: my $hashref = &tie_domain_hash($cdom, "nohist_courseids", &GDBM_WRCREAT());
4598: if ($hashref) {
4599: while (my ($key,$value) = each(%$hashref)) {
4600: my ($unesc_key,$lasttime);
4601: $unesc_key = &unescape($key);
4602: if ($cnum) {
4603: next unless ($unesc_key =~ /\Q$cdom\E_\Q$cnum\E$/);
4604: }
4605: if ($unesc_key =~ /^lasttime:($LONCAPA::match_domain\_$LONCAPA::match_courseid)/) {
4606: $lastaccess{$1} = $value;
4607: } else {
4608: my $items = &Apache::lonnet::thaw_unescape($value);
4609: if (ref($items) eq 'HASH') {
4610: unless ($lastaccess{$unesc_key}) {
4611: $lastaccess{$unesc_key} = '';
4612: }
4613: } else {
4614: my @courseitems = split(':',$value);
4615: $lastaccess{$unesc_key} = pop(@courseitems);
4616: }
4617: }
4618: }
4619: foreach my $cid (sort(keys(%lastaccess))) {
4620: $qresult.=&escape($cid).'='.$lastaccess{$cid}.'&';
4621: }
4622: if (&untie_domain_hash($hashref)) {
4623: if ($qresult) {
4624: chop($qresult);
4625: }
4626: &Reply($client, \$qresult, $userinput);
4627: } else {
4628: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4629: "while attempting lastacourseaccess\n", $userinput);
4630: }
4631: } else {
4632: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4633: "while attempting lastcourseaccess\n", $userinput);
4634: }
4635: return 1;
4636: }
4637: ®ister_handler("courselastaccess",\&course_lastaccess_handler, 0, 1, 0);
4638:
4639: #
4640: # Puts an unencrypted entry in a namespace db file at the domain level
4641: #
4642: # Parameters:
4643: # $cmd - The command that got us here.
4644: # $tail - Tail of the command (remaining parameters).
4645: # $client - File descriptor connected to client.
4646: # Returns
4647: # 0 - Requested to exit, caller should shut down.
4648: # 1 - Continue processing.
4649: # Side effects:
4650: # reply is written to $client.
4651: #
4652: sub put_domain_handler {
4653: my ($cmd,$tail,$client) = @_;
4654:
4655: my $userinput = "$cmd:$tail";
4656:
4657: my ($udom,$namespace,$what) =split(/:/,$tail,3);
4658: chomp($what);
4659: my @pairs=split(/\&/,$what);
4660: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_WRCREAT(),
4661: "P", $what);
4662: if ($hashref) {
4663: foreach my $pair (@pairs) {
4664: my ($key,$value)=split(/=/,$pair);
4665: $hashref->{$key}=$value;
4666: }
4667: if (&untie_domain_hash($hashref)) {
4668: &Reply($client, "ok\n", $userinput);
4669: } else {
4670: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4671: "while attempting putdom\n", $userinput);
4672: }
4673: } else {
4674: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4675: "while attempting putdom\n", $userinput);
4676: }
4677:
4678: return 1;
4679: }
4680: ®ister_handler("putdom", \&put_domain_handler, 0, 1, 0);
4681:
4682: # Updates one or more entries in clickers.db file at the domain level
4683: #
4684: # Parameters:
4685: # $cmd - The command that got us here.
4686: # $tail - Tail of the command (remaining parameters).
4687: # In this case a colon separated list containing:
4688: # (a) the domain for which we are updating the entries,
4689: # (b) the action required -- add or del -- and
4690: # (c) a &-separated list of entries to add or delete.
4691: # $client - File descriptor connected to client.
4692: # Returns
4693: # 1 - Continue processing.
4694: # 0 - Requested to exit, caller should shut down.
4695: # Side effects:
4696: # reply is written to $client.
4697: #
4698:
4699:
4700: sub update_clickers {
4701: my ($cmd, $tail, $client) = @_;
4702:
4703: my $userinput = "$cmd:$tail";
4704: my ($udom,$action,$what) =split(/:/,$tail,3);
4705: chomp($what);
4706:
4707: my $hashref = &tie_domain_hash($udom, "clickers", &GDBM_WRCREAT(),
4708: "U","$action:$what");
4709:
4710: if (!$hashref) {
4711: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4712: "while attempting updateclickers\n", $userinput);
4713: return 1;
4714: }
4715:
4716: my @pairs=split(/\&/,$what);
4717: foreach my $pair (@pairs) {
4718: my ($key,$value)=split(/=/,$pair);
4719: if ($action eq 'add') {
4720: if (exists($hashref->{$key})) {
4721: my @newvals = split(/,/,&unescape($value));
4722: my @currvals = split(/,/,&unescape($hashref->{$key}));
4723: my @merged = sort(keys(%{{map { $_ => 1 } (@newvals,@currvals)}}));
4724: $hashref->{$key}=&escape(join(',',@merged));
4725: } else {
4726: $hashref->{$key}=$value;
4727: }
4728: } elsif ($action eq 'del') {
4729: if (exists($hashref->{$key})) {
4730: my %current;
4731: map { $current{$_} = 1; } split(/,/,&unescape($hashref->{$key}));
4732: map { delete($current{$_}); } split(/,/,&unescape($value));
4733: if (keys(%current)) {
4734: $hashref->{$key}=&escape(join(',',sort(keys(%current))));
4735: } else {
4736: delete($hashref->{$key});
4737: }
4738: }
4739: }
4740: }
4741: if (&untie_user_hash($hashref)) {
4742: &Reply( $client, "ok\n", $userinput);
4743: } else {
4744: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
4745: "while attempting put\n",
4746: $userinput);
4747: }
4748: return 1;
4749: }
4750: ®ister_handler("updateclickers", \&update_clickers, 0, 1, 0);
4751:
4752:
4753: # Deletes one or more entries in a namespace db file at the domain level
4754: #
4755: # Parameters:
4756: # $cmd - The command that got us here.
4757: # $tail - Tail of the command (remaining parameters).
4758: # In this case a colon separated list containing:
4759: # (a) the domain for which we are deleting the entries,
4760: # (b) &-separated list of keys to delete.
4761: # $client - File descriptor connected to client.
4762: # Returns
4763: # 1 - Continue processing.
4764: # 0 - Requested to exit, caller should shut down.
4765: # Side effects:
4766: # reply is written to $client.
4767: #
4768:
4769: sub del_domain_handler {
4770: my ($cmd,$tail,$client) = @_;
4771:
4772: my $userinput = "$cmd:$tail";
4773:
4774: my ($udom,$namespace,$what)=split(/:/,$tail,3);
4775: chomp($what);
4776: my $hashref = &tie_domain_hash($udom,$namespace,&GDBM_WRCREAT(),
4777: "D", $what);
4778: if ($hashref) {
4779: my @keys=split(/\&/,$what);
4780: foreach my $key (@keys) {
4781: delete($hashref->{$key});
4782: }
4783: if (&untie_user_hash($hashref)) {
4784: &Reply($client, "ok\n", $userinput);
4785: } else {
4786: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4787: "while attempting deldom\n", $userinput);
4788: }
4789: } else {
4790: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4791: "while attempting deldom\n", $userinput);
4792: }
4793: return 1;
4794: }
4795: ®ister_handler("deldom", \&del_domain_handler, 0, 1, 0);
4796:
4797:
4798: # Unencrypted get from the namespace database file at the domain level.
4799: # This function retrieves a keyed item from a specific named database in the
4800: # domain directory.
4801: #
4802: # Parameters:
4803: # $cmd - Command request keyword (get).
4804: # $tail - Tail of the command. This is a colon separated list
4805: # consisting of the domain and the 'namespace'
4806: # which selects the gdbm file to do the lookup in,
4807: # & separated list of keys to lookup. Note that
4808: # the values are returned as an & separated list too.
4809: # $client - File descriptor open on the client.
4810: # Returns:
4811: # 1 - Continue processing.
4812: # 0 - Exit.
4813: # Side effects:
4814: # reply is written to $client.
4815: #
4816:
4817: sub get_domain_handler {
4818: my ($cmd, $tail, $client) = @_;
4819:
4820:
4821: my $userinput = "$client:$tail";
4822:
4823: my ($udom,$namespace,$what)=split(/:/,$tail,3);
4824: chomp($what);
4825: my @queries=split(/\&/,$what);
4826: my $qresult='';
4827: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_READER());
4828: if ($hashref) {
4829: for (my $i=0;$i<=$#queries;$i++) {
4830: $qresult.="$hashref->{$queries[$i]}&";
4831: }
4832: if (&untie_domain_hash($hashref)) {
4833: $qresult=~s/\&$//;
4834: &Reply($client, \$qresult, $userinput);
4835: } else {
4836: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
4837: "while attempting getdom\n",$userinput);
4838: }
4839: } else {
4840: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4841: "while attempting getdom\n",$userinput);
4842: }
4843:
4844: return 1;
4845: }
4846: ®ister_handler("getdom", \&get_domain_handler, 0, 1, 0);
4847:
4848: #
4849: # Puts an id to a domains id database.
4850: #
4851: # Parameters:
4852: # $cmd - The command that triggered us.
4853: # $tail - Remainder of the request other than the command. This is a
4854: # colon separated list containing:
4855: # $domain - The domain for which we are writing the id.
4856: # $pairs - The id info to write... this is and & separated list
4857: # of keyword=value.
4858: # $client - Socket open on the client.
4859: # Returns:
4860: # 1 - Continue processing.
4861: # Side effects:
4862: # reply is written to $client.
4863: #
4864: sub put_id_handler {
4865: my ($cmd,$tail,$client) = @_;
4866:
4867:
4868: my $userinput = "$cmd:$tail";
4869:
4870: my ($udom,$what)=split(/:/,$tail);
4871: chomp($what);
4872: my @pairs=split(/\&/,$what);
4873: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
4874: "P", $what);
4875: if ($hashref) {
4876: foreach my $pair (@pairs) {
4877: my ($key,$value)=split(/=/,$pair);
4878: $hashref->{$key}=$value;
4879: }
4880: if (&untie_domain_hash($hashref)) {
4881: &Reply($client, "ok\n", $userinput);
4882: } else {
4883: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4884: "while attempting idput\n", $userinput);
4885: }
4886: } else {
4887: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4888: "while attempting idput\n", $userinput);
4889: }
4890:
4891: return 1;
4892: }
4893: ®ister_handler("idput", \&put_id_handler, 0, 1, 0);
4894:
4895: #
4896: # Retrieves a set of id values from the id database.
4897: # Returns an & separated list of results, one for each requested id to the
4898: # client.
4899: #
4900: # Parameters:
4901: # $cmd - Command keyword that caused us to be dispatched.
4902: # $tail - Tail of the command. Consists of a colon separated:
4903: # domain - the domain whose id table we dump
4904: # ids Consists of an & separated list of
4905: # id keywords whose values will be fetched.
4906: # nonexisting keywords will have an empty value.
4907: # $client - Socket open on the client.
4908: #
4909: # Returns:
4910: # 1 - indicating processing should continue.
4911: # Side effects:
4912: # An & separated list of results is written to $client.
4913: #
4914: sub get_id_handler {
4915: my ($cmd, $tail, $client) = @_;
4916:
4917:
4918: my $userinput = "$client:$tail";
4919:
4920: my ($udom,$what)=split(/:/,$tail);
4921: chomp($what);
4922: my @queries=split(/\&/,$what);
4923: my $qresult='';
4924: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_READER());
4925: if ($hashref) {
4926: for (my $i=0;$i<=$#queries;$i++) {
4927: $qresult.="$hashref->{$queries[$i]}&";
4928: }
4929: if (&untie_domain_hash($hashref)) {
4930: $qresult=~s/\&$//;
4931: &Reply($client, \$qresult, $userinput);
4932: } else {
4933: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
4934: "while attempting idget\n",$userinput);
4935: }
4936: } else {
4937: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4938: "while attempting idget\n",$userinput);
4939: }
4940:
4941: return 1;
4942: }
4943: ®ister_handler("idget", \&get_id_handler, 0, 1, 0);
4944:
4945: # Deletes one or more ids in a domain's id database.
4946: #
4947: # Parameters:
4948: # $cmd - Command keyword (iddel).
4949: # $tail - Command tail. In this case a colon
4950: # separated list containing:
4951: # The domain for which we are deleting the id(s).
4952: # &-separated list of id(s) to delete.
4953: # $client - File open on client socket.
4954: # Returns:
4955: # 1 - Continue processing
4956: # 0 - Exit server.
4957: #
4958: #
4959:
4960: sub del_id_handler {
4961: my ($cmd,$tail,$client) = @_;
4962:
4963: my $userinput = "$cmd:$tail";
4964:
4965: my ($udom,$what)=split(/:/,$tail);
4966: chomp($what);
4967: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
4968: "D", $what);
4969: if ($hashref) {
4970: my @keys=split(/\&/,$what);
4971: foreach my $key (@keys) {
4972: delete($hashref->{$key});
4973: }
4974: if (&untie_user_hash($hashref)) {
4975: &Reply($client, "ok\n", $userinput);
4976: } else {
4977: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4978: "while attempting iddel\n", $userinput);
4979: }
4980: } else {
4981: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4982: "while attempting iddel\n", $userinput);
4983: }
4984: return 1;
4985: }
4986: ®ister_handler("iddel", \&del_id_handler, 0, 1, 0);
4987:
4988: #
4989: # Puts broadcast e-mail sent by Domain Coordinator in nohist_dcmail database
4990: #
4991: # Parameters
4992: # $cmd - Command keyword that caused us to be dispatched.
4993: # $tail - Tail of the command. Consists of a colon separated:
4994: # domain - the domain whose dcmail we are recording
4995: # email Consists of key=value pair
4996: # where key is unique msgid
4997: # and value is message (in XML)
4998: # $client - Socket open on the client.
4999: #
5000: # Returns:
5001: # 1 - indicating processing should continue.
5002: # Side effects
5003: # reply is written to $client.
5004: #
5005: sub put_dcmail_handler {
5006: my ($cmd,$tail,$client) = @_;
5007: my $userinput = "$cmd:$tail";
5008:
5009:
5010: my ($udom,$what)=split(/:/,$tail);
5011: chomp($what);
5012: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
5013: if ($hashref) {
5014: my ($key,$value)=split(/=/,$what);
5015: $hashref->{$key}=$value;
5016: }
5017: if (&untie_domain_hash($hashref)) {
5018: &Reply($client, "ok\n", $userinput);
5019: } else {
5020: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
5021: "while attempting dcmailput\n", $userinput);
5022: }
5023: return 1;
5024: }
5025: ®ister_handler("dcmailput", \&put_dcmail_handler, 0, 1, 0);
5026:
5027: #
5028: # Retrieves broadcast e-mail from nohist_dcmail database
5029: # Returns to client an & separated list of key=value pairs,
5030: # where key is msgid and value is message information.
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 dcmail table we dump
5036: # startfilter - beginning of time window
5037: # endfilter - end of time window
5038: # sendersfilter - & separated list of username:domain
5039: # for senders to search for.
5040: # $client - Socket open on the client.
5041: #
5042: # Returns:
5043: # 1 - indicating processing should continue.
5044: # Side effects
5045: # reply (& separated list of msgid=messageinfo pairs) is
5046: # written to $client.
5047: #
5048: sub dump_dcmail_handler {
5049: my ($cmd, $tail, $client) = @_;
5050:
5051: my $userinput = "$cmd:$tail";
5052: my ($udom,$startfilter,$endfilter,$sendersfilter) = split(/:/,$tail);
5053: chomp($sendersfilter);
5054: my @senders = ();
5055: if (defined($startfilter)) {
5056: $startfilter=&unescape($startfilter);
5057: } else {
5058: $startfilter='.';
5059: }
5060: if (defined($endfilter)) {
5061: $endfilter=&unescape($endfilter);
5062: } else {
5063: $endfilter='.';
5064: }
5065: if (defined($sendersfilter)) {
5066: $sendersfilter=&unescape($sendersfilter);
5067: @senders = map { &unescape($_) } split(/\&/,$sendersfilter);
5068: }
5069:
5070: my $qresult='';
5071: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
5072: if ($hashref) {
5073: while (my ($key,$value) = each(%$hashref)) {
5074: my $match = 1;
5075: my ($timestamp,$subj,$uname,$udom) =
5076: split(/:/,&unescape(&unescape($key)),5); # yes, twice really
5077: $subj = &unescape($subj);
5078: unless ($startfilter eq '.' || !defined($startfilter)) {
5079: if ($timestamp < $startfilter) {
5080: $match = 0;
5081: }
5082: }
5083: unless ($endfilter eq '.' || !defined($endfilter)) {
5084: if ($timestamp > $endfilter) {
5085: $match = 0;
5086: }
5087: }
5088: unless (@senders < 1) {
5089: unless (grep/^$uname:$udom$/,@senders) {
5090: $match = 0;
5091: }
5092: }
5093: if ($match == 1) {
5094: $qresult.=$key.'='.$value.'&';
5095: }
5096: }
5097: if (&untie_domain_hash($hashref)) {
5098: chop($qresult);
5099: &Reply($client, \$qresult, $userinput);
5100: } else {
5101: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
5102: "while attempting dcmaildump\n", $userinput);
5103: }
5104: } else {
5105: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
5106: "while attempting dcmaildump\n", $userinput);
5107: }
5108: return 1;
5109: }
5110:
5111: ®ister_handler("dcmaildump", \&dump_dcmail_handler, 0, 1, 0);
5112:
5113: #
5114: # Puts domain roles in nohist_domainroles database
5115: #
5116: # Parameters
5117: # $cmd - Command keyword that caused us to be dispatched.
5118: # $tail - Tail of the command. Consists of a colon separated:
5119: # domain - the domain whose roles we are recording
5120: # role - Consists of key=value pair
5121: # where key is unique role
5122: # and value is start/end date information
5123: # $client - Socket open on the client.
5124: #
5125: # Returns:
5126: # 1 - indicating processing should continue.
5127: # Side effects
5128: # reply is written to $client.
5129: #
5130:
5131: sub put_domainroles_handler {
5132: my ($cmd,$tail,$client) = @_;
5133:
5134: my $userinput = "$cmd:$tail";
5135: my ($udom,$what)=split(/:/,$tail);
5136: chomp($what);
5137: my @pairs=split(/\&/,$what);
5138: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
5139: if ($hashref) {
5140: foreach my $pair (@pairs) {
5141: my ($key,$value)=split(/=/,$pair);
5142: $hashref->{$key}=$value;
5143: }
5144: if (&untie_domain_hash($hashref)) {
5145: &Reply($client, "ok\n", $userinput);
5146: } else {
5147: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
5148: "while attempting domroleput\n", $userinput);
5149: }
5150: } else {
5151: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
5152: "while attempting domroleput\n", $userinput);
5153: }
5154:
5155: return 1;
5156: }
5157:
5158: ®ister_handler("domroleput", \&put_domainroles_handler, 0, 1, 0);
5159:
5160: #
5161: # Retrieves domain roles from nohist_domainroles database
5162: # Returns to client an & separated list of key=value pairs,
5163: # where key is role and value is start and end date information.
5164: #
5165: # Parameters
5166: # $cmd - Command keyword that caused us to be dispatched.
5167: # $tail - Tail of the command. Consists of a colon separated:
5168: # domain - the domain whose domain roles table we dump
5169: # $client - Socket open on the client.
5170: #
5171: # Returns:
5172: # 1 - indicating processing should continue.
5173: # Side effects
5174: # reply (& separated list of role=start/end info pairs) is
5175: # written to $client.
5176: #
5177: sub dump_domainroles_handler {
5178: my ($cmd, $tail, $client) = @_;
5179:
5180: my $userinput = "$cmd:$tail";
5181: my ($udom,$startfilter,$endfilter,$rolesfilter) = split(/:/,$tail);
5182: chomp($rolesfilter);
5183: my @roles = ();
5184: if (defined($startfilter)) {
5185: $startfilter=&unescape($startfilter);
5186: } else {
5187: $startfilter='.';
5188: }
5189: if (defined($endfilter)) {
5190: $endfilter=&unescape($endfilter);
5191: } else {
5192: $endfilter='.';
5193: }
5194: if (defined($rolesfilter)) {
5195: $rolesfilter=&unescape($rolesfilter);
5196: @roles = split(/\&/,$rolesfilter);
5197: }
5198:
5199: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
5200: if ($hashref) {
5201: my $qresult = '';
5202: while (my ($key,$value) = each(%$hashref)) {
5203: my $match = 1;
5204: my ($end,$start) = split(/:/,&unescape($value));
5205: my ($trole,$uname,$udom,$runame,$rudom,$rsec) = split(/:/,&unescape($key));
5206: unless (@roles < 1) {
5207: unless (grep/^\Q$trole\E$/,@roles) {
5208: $match = 0;
5209: next;
5210: }
5211: }
5212: unless ($startfilter eq '.' || !defined($startfilter)) {
5213: if ((defined($start)) && ($start >= $startfilter)) {
5214: $match = 0;
5215: next;
5216: }
5217: }
5218: unless ($endfilter eq '.' || !defined($endfilter)) {
5219: if ((defined($end)) && (($end > 0) && ($end <= $endfilter))) {
5220: $match = 0;
5221: next;
5222: }
5223: }
5224: if ($match == 1) {
5225: $qresult.=$key.'='.$value.'&';
5226: }
5227: }
5228: if (&untie_domain_hash($hashref)) {
5229: chop($qresult);
5230: &Reply($client, \$qresult, $userinput);
5231: } else {
5232: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
5233: "while attempting domrolesdump\n", $userinput);
5234: }
5235: } else {
5236: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
5237: "while attempting domrolesdump\n", $userinput);
5238: }
5239: return 1;
5240: }
5241:
5242: ®ister_handler("domrolesdump", \&dump_domainroles_handler, 0, 1, 0);
5243:
5244:
5245: # Process the tmpput command I'm not sure what this does.. Seems to
5246: # create a file in the lonDaemons/tmp directory of the form $id.tmp
5247: # where Id is the client's ip concatenated with a sequence number.
5248: # The file will contain some value that is passed in. Is this e.g.
5249: # a login token?
5250: #
5251: # Parameters:
5252: # $cmd - The command that got us dispatched.
5253: # $tail - The remainder of the request following $cmd:
5254: # In this case this will be the contents of the file.
5255: # $client - Socket connected to the client.
5256: # Returns:
5257: # 1 indicating processing can continue.
5258: # Side effects:
5259: # A file is created in the local filesystem.
5260: # A reply is sent to the client.
5261: sub tmp_put_handler {
5262: my ($cmd, $what, $client) = @_;
5263:
5264: my $userinput = "$cmd:$what"; # Reconstruct for logging.
5265:
5266: my ($record,$context) = split(/:/,$what);
5267: if ($context ne '') {
5268: chomp($context);
5269: $context = &unescape($context);
5270: }
5271: my ($id,$store);
5272: $tmpsnum++;
5273: if (($context eq 'resetpw') || ($context eq 'createaccount')) {
5274: $id = &md5_hex(&md5_hex(time.{}.rand().$$));
5275: } else {
5276: $id = $$.'_'.$clientip.'_'.$tmpsnum;
5277: }
5278: $id=~s/\W/\_/g;
5279: $record=~s/\n//g;
5280: my $execdir=$perlvar{'lonDaemons'};
5281: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
5282: print $store $record;
5283: close $store;
5284: &Reply($client, \$id, $userinput);
5285: } else {
5286: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
5287: "while attempting tmpput\n", $userinput);
5288: }
5289: return 1;
5290:
5291: }
5292: ®ister_handler("tmpput", \&tmp_put_handler, 0, 1, 0);
5293:
5294: # Processes the tmpget command. This command returns the contents
5295: # of a temporary resource file(?) created via tmpput.
5296: #
5297: # Paramters:
5298: # $cmd - Command that got us dispatched.
5299: # $id - Tail of the command, contain the id of the resource
5300: # we want to fetch.
5301: # $client - socket open on the client.
5302: # Return:
5303: # 1 - Inidcating processing can continue.
5304: # Side effects:
5305: # A reply is sent to the client.
5306: #
5307: sub tmp_get_handler {
5308: my ($cmd, $id, $client) = @_;
5309:
5310: my $userinput = "$cmd:$id";
5311:
5312:
5313: $id=~s/\W/\_/g;
5314: my $store;
5315: my $execdir=$perlvar{'lonDaemons'};
5316: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
5317: my $reply=<$store>;
5318: &Reply( $client, \$reply, $userinput);
5319: close $store;
5320: } else {
5321: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
5322: "while attempting tmpget\n", $userinput);
5323: }
5324:
5325: return 1;
5326: }
5327: ®ister_handler("tmpget", \&tmp_get_handler, 0, 1, 0);
5328:
5329: #
5330: # Process the tmpdel command. This command deletes a temp resource
5331: # created by the tmpput command.
5332: #
5333: # Parameters:
5334: # $cmd - Command that got us here.
5335: # $id - Id of the temporary resource created.
5336: # $client - socket open on the client process.
5337: #
5338: # Returns:
5339: # 1 - Indicating processing should continue.
5340: # Side Effects:
5341: # A file is deleted
5342: # A reply is sent to the client.
5343: sub tmp_del_handler {
5344: my ($cmd, $id, $client) = @_;
5345:
5346: my $userinput= "$cmd:$id";
5347:
5348: chomp($id);
5349: $id=~s/\W/\_/g;
5350: my $execdir=$perlvar{'lonDaemons'};
5351: if (unlink("$execdir/tmp/$id.tmp")) {
5352: &Reply($client, "ok\n", $userinput);
5353: } else {
5354: &Failure( $client, "error: ".($!+0)."Unlink tmp Failed ".
5355: "while attempting tmpdel\n", $userinput);
5356: }
5357:
5358: return 1;
5359:
5360: }
5361: ®ister_handler("tmpdel", \&tmp_del_handler, 0, 1, 0);
5362:
5363: #
5364: # Processes the setannounce command. This command
5365: # creates a file named announce.txt in the top directory of
5366: # the documentn root and sets its contents. The announce.txt file is
5367: # printed in its entirety at the LonCAPA login page. Note:
5368: # once the announcement.txt fileis created it cannot be deleted.
5369: # However, setting the contents of the file to empty removes the
5370: # announcement from the login page of loncapa so who cares.
5371: #
5372: # Parameters:
5373: # $cmd - The command that got us dispatched.
5374: # $announcement - The text of the announcement.
5375: # $client - Socket open on the client process.
5376: # Retunrns:
5377: # 1 - Indicating request processing should continue
5378: # Side Effects:
5379: # The file {DocRoot}/announcement.txt is created.
5380: # A reply is sent to $client.
5381: #
5382: sub set_announce_handler {
5383: my ($cmd, $announcement, $client) = @_;
5384:
5385: my $userinput = "$cmd:$announcement";
5386:
5387: chomp($announcement);
5388: $announcement=&unescape($announcement);
5389: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
5390: '/announcement.txt')) {
5391: print $store $announcement;
5392: close $store;
5393: &Reply($client, "ok\n", $userinput);
5394: } else {
5395: &Failure($client, "error: ".($!+0)."\n", $userinput);
5396: }
5397:
5398: return 1;
5399: }
5400: ®ister_handler("setannounce", \&set_announce_handler, 0, 1, 0);
5401:
5402: #
5403: # Return the version of the daemon. This can be used to determine
5404: # the compatibility of cross version installations or, alternatively to
5405: # simply know who's out of date and who isn't. Note that the version
5406: # is returned concatenated with the tail.
5407: # Parameters:
5408: # $cmd - the request that dispatched to us.
5409: # $tail - Tail of the request (client's version?).
5410: # $client - Socket open on the client.
5411: #Returns:
5412: # 1 - continue processing requests.
5413: # Side Effects:
5414: # Replies with version to $client.
5415: sub get_version_handler {
5416: my ($cmd, $tail, $client) = @_;
5417:
5418: my $userinput = $cmd.$tail;
5419:
5420: &Reply($client, &version($userinput)."\n", $userinput);
5421:
5422:
5423: return 1;
5424: }
5425: ®ister_handler("version", \&get_version_handler, 0, 1, 0);
5426:
5427: # Set the current host and domain. This is used to support
5428: # multihomed systems. Each IP of the system, or even separate daemons
5429: # on the same IP can be treated as handling a separate lonCAPA virtual
5430: # machine. This command selects the virtual lonCAPA. The client always
5431: # knows the right one since it is lonc and it is selecting the domain/system
5432: # from the hosts.tab file.
5433: # Parameters:
5434: # $cmd - Command that dispatched us.
5435: # $tail - Tail of the command (domain/host requested).
5436: # $socket - Socket open on the client.
5437: #
5438: # Returns:
5439: # 1 - Indicates the program should continue to process requests.
5440: # Side-effects:
5441: # The default domain/system context is modified for this daemon.
5442: # a reply is sent to the client.
5443: #
5444: sub set_virtual_host_handler {
5445: my ($cmd, $tail, $socket) = @_;
5446:
5447: my $userinput ="$cmd:$tail";
5448:
5449: &Reply($client, &sethost($userinput)."\n", $userinput);
5450:
5451:
5452: return 1;
5453: }
5454: ®ister_handler("sethost", \&set_virtual_host_handler, 0, 1, 0);
5455:
5456: # Process a request to exit:
5457: # - "bye" is sent to the client.
5458: # - The client socket is shutdown and closed.
5459: # - We indicate to the caller that we should exit.
5460: # Formal Parameters:
5461: # $cmd - The command that got us here.
5462: # $tail - Tail of the command (empty).
5463: # $client - Socket open on the tail.
5464: # Returns:
5465: # 0 - Indicating the program should exit!!
5466: #
5467: sub exit_handler {
5468: my ($cmd, $tail, $client) = @_;
5469:
5470: my $userinput = "$cmd:$tail";
5471:
5472: &logthis("Client $clientip ($clientname) hanging up: $userinput");
5473: &Reply($client, "bye\n", $userinput);
5474: $client->shutdown(2); # shutdown the socket forcibly.
5475: $client->close();
5476:
5477: return 0;
5478: }
5479: ®ister_handler("exit", \&exit_handler, 0,1,1);
5480: ®ister_handler("init", \&exit_handler, 0,1,1);
5481: ®ister_handler("quit", \&exit_handler, 0,1,1);
5482:
5483: # Determine if auto-enrollment is enabled.
5484: # Note that the original had what I believe to be a defect.
5485: # The original returned 0 if the requestor was not a registerd client.
5486: # It should return "refused".
5487: # Formal Parameters:
5488: # $cmd - The command that invoked us.
5489: # $tail - The tail of the command (Extra command parameters.
5490: # $client - The socket open on the client that issued the request.
5491: # Returns:
5492: # 1 - Indicating processing should continue.
5493: #
5494: sub enrollment_enabled_handler {
5495: my ($cmd, $tail, $client) = @_;
5496: my $userinput = $cmd.":".$tail; # For logging purposes.
5497:
5498:
5499: my ($cdom) = split(/:/, $tail, 2); # Domain we're asking about.
5500:
5501: my $outcome = &localenroll::run($cdom);
5502: &Reply($client, \$outcome, $userinput);
5503:
5504: return 1;
5505: }
5506: ®ister_handler("autorun", \&enrollment_enabled_handler, 0, 1, 0);
5507:
5508: #
5509: # Validate an institutional code used for a LON-CAPA course.
5510: #
5511: # Formal Parameters:
5512: # $cmd - The command request that got us dispatched.
5513: # $tail - The tail of the command. In this case,
5514: # this is a colon separated set of words that will be split
5515: # into:
5516: # $dom - The domain for which the check of
5517: # institutional course code will occur.
5518: #
5519: # $instcode - The institutional code for the course
5520: # being requested, or validated for rights
5521: # to request.
5522: #
5523: # $owner - The course requestor (who will be the
5524: # course owner, in the form username:domain
5525: #
5526: # $client - Socket open on the client.
5527: # Returns:
5528: # 1 - Indicating processing should continue.
5529: #
5530: sub validate_instcode_handler {
5531: my ($cmd, $tail, $client) = @_;
5532: my $userinput = "$cmd:$tail";
5533: my ($dom,$instcode,$owner) = split(/:/, $tail);
5534: $instcode = &unescape($instcode);
5535: $owner = &unescape($owner);
5536: my ($outcome,$description,$credits) =
5537: &localenroll::validate_instcode($dom,$instcode,$owner);
5538: my $result = &escape($outcome).'&'.&escape($description).'&'.
5539: &escape($credits);
5540: &Reply($client, \$result, $userinput);
5541:
5542: return 1;
5543: }
5544: ®ister_handler("autovalidateinstcode", \&validate_instcode_handler, 0, 1, 0);
5545:
5546: # Get the official sections for which auto-enrollment is possible.
5547: # Since the admin people won't know about 'unofficial sections'
5548: # we cannot auto-enroll on them.
5549: # Formal Parameters:
5550: # $cmd - The command request that got us dispatched here.
5551: # $tail - The remainder of the request. In our case this
5552: # will be split into:
5553: # $coursecode - The course name from the admin point of view.
5554: # $cdom - The course's domain(?).
5555: # $client - Socket open on the client.
5556: # Returns:
5557: # 1 - Indiciting processing should continue.
5558: #
5559: sub get_sections_handler {
5560: my ($cmd, $tail, $client) = @_;
5561: my $userinput = "$cmd:$tail";
5562:
5563: my ($coursecode, $cdom) = split(/:/, $tail);
5564: my @secs = &localenroll::get_sections($coursecode,$cdom);
5565: my $seclist = &escape(join(':',@secs));
5566:
5567: &Reply($client, \$seclist, $userinput);
5568:
5569:
5570: return 1;
5571: }
5572: ®ister_handler("autogetsections", \&get_sections_handler, 0, 1, 0);
5573:
5574: # Validate the owner of a new course section.
5575: #
5576: # Formal Parameters:
5577: # $cmd - Command that got us dispatched.
5578: # $tail - the remainder of the command. For us this consists of a
5579: # colon separated string containing:
5580: # $inst - Course Id from the institutions point of view.
5581: # $owner - Proposed owner of the course.
5582: # $cdom - Domain of the course (from the institutions
5583: # point of view?)..
5584: # $client - Socket open on the client.
5585: #
5586: # Returns:
5587: # 1 - Processing should continue.
5588: #
5589: sub validate_course_owner_handler {
5590: my ($cmd, $tail, $client) = @_;
5591: my $userinput = "$cmd:$tail";
5592: my ($inst_course_id, $owner, $cdom, $coowners) = split(/:/, $tail);
5593:
5594: $owner = &unescape($owner);
5595: $coowners = &unescape($coowners);
5596: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom,$coowners);
5597: &Reply($client, \$outcome, $userinput);
5598:
5599:
5600:
5601: return 1;
5602: }
5603: ®ister_handler("autonewcourse", \&validate_course_owner_handler, 0, 1, 0);
5604:
5605: #
5606: # Validate a course section in the official schedule of classes
5607: # from the institutions point of view (part of autoenrollment).
5608: #
5609: # Formal Parameters:
5610: # $cmd - The command request that got us dispatched.
5611: # $tail - The tail of the command. In this case,
5612: # this is a colon separated set of words that will be split
5613: # into:
5614: # $inst_course_id - The course/section id from the
5615: # institutions point of view.
5616: # $cdom - The domain from the institutions
5617: # point of view.
5618: # $client - Socket open on the client.
5619: # Returns:
5620: # 1 - Indicating processing should continue.
5621: #
5622: sub validate_course_section_handler {
5623: my ($cmd, $tail, $client) = @_;
5624: my $userinput = "$cmd:$tail";
5625: my ($inst_course_id, $cdom) = split(/:/, $tail);
5626:
5627: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
5628: &Reply($client, \$outcome, $userinput);
5629:
5630:
5631: return 1;
5632: }
5633: ®ister_handler("autovalidatecourse", \&validate_course_section_handler, 0, 1, 0);
5634:
5635: #
5636: # Validate course owner's access to enrollment data for specific class section.
5637: #
5638: #
5639: # Formal Parameters:
5640: # $cmd - The command request that got us dispatched.
5641: # $tail - The tail of the command. In this case this is a colon separated
5642: # set of words that will be split into:
5643: # $inst_class - Institutional code for the specific class section
5644: # $courseowner - The escaped username:domain of the course owner
5645: # $cdom - The domain of the course from the institution's
5646: # point of view.
5647: # $client - The socket open on the client.
5648: # Returns:
5649: # 1 - continue processing.
5650: #
5651:
5652: sub validate_class_access_handler {
5653: my ($cmd, $tail, $client) = @_;
5654: my $userinput = "$cmd:$tail";
5655: my ($inst_class,$ownerlist,$cdom) = split(/:/, $tail);
5656: my $owners = &unescape($ownerlist);
5657: my $outcome;
5658: eval {
5659: local($SIG{__DIE__})='DEFAULT';
5660: $outcome=&localenroll::check_section($inst_class,$owners,$cdom);
5661: };
5662: &Reply($client,\$outcome, $userinput);
5663:
5664: return 1;
5665: }
5666: ®ister_handler("autovalidateclass_sec", \&validate_class_access_handler, 0, 1, 0);
5667:
5668: #
5669: # Create a password for a new LON-CAPA user added by auto-enrollment.
5670: # Only used for case where authentication method for new user is localauth
5671: #
5672: # Formal Parameters:
5673: # $cmd - The command request that got us dispatched.
5674: # $tail - The tail of the command. In this case this is a colon separated
5675: # set of words that will be split into:
5676: # $authparam - An authentication parameter (localauth parameter).
5677: # $cdom - The domain of the course from the institution's
5678: # point of view.
5679: # $client - The socket open on the client.
5680: # Returns:
5681: # 1 - continue processing.
5682: #
5683: sub create_auto_enroll_password_handler {
5684: my ($cmd, $tail, $client) = @_;
5685: my $userinput = "$cmd:$tail";
5686:
5687: my ($authparam, $cdom) = split(/:/, $userinput);
5688:
5689: my ($create_passwd,$authchk);
5690: ($authparam,
5691: $create_passwd,
5692: $authchk) = &localenroll::create_password($authparam,$cdom);
5693:
5694: &Reply($client, &escape($authparam.':'.$create_passwd.':'.$authchk)."\n",
5695: $userinput);
5696:
5697:
5698: return 1;
5699: }
5700: ®ister_handler("autocreatepassword", \&create_auto_enroll_password_handler,
5701: 0, 1, 0);
5702:
5703: sub auto_export_grades_handler {
5704: my ($cmd, $tail, $client) = @_;
5705: my $userinput = "$cmd:$tail";
5706: my ($cdom,$cnum,$info,$data) = split(/:/,$tail);
5707: my $inforef = &Apache::lonnet::thaw_unescape($info);
5708: my $dataref = &Apache::lonnet::thaw_unescape($data);
5709: my ($outcome,$result);;
5710: eval {
5711: local($SIG{__DIE__})='DEFAULT';
5712: my %rtnhash;
5713: $outcome=&localenroll::export_grades($cdom,$cnum,$inforef,$dataref,\%rtnhash);
5714: if ($outcome eq 'ok') {
5715: foreach my $key (keys(%rtnhash)) {
5716: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rtnhash{$key}).'&';
5717: }
5718: $result =~ s/\&$//;
5719: }
5720: };
5721: if (!$@) {
5722: if ($outcome eq 'ok') {
5723: if ($cipher) {
5724: my $cmdlength=length($result);
5725: $result.=" ";
5726: my $encresult='';
5727: for (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
5728: $encresult.= unpack("H16",
5729: $cipher->encrypt(substr($result,
5730: $encidx,
5731: 8)));
5732: }
5733: &Reply( $client, "enc:$cmdlength:$encresult\n", $userinput);
5734: } else {
5735: &Failure( $client, "error:no_key\n", $userinput);
5736: }
5737: } else {
5738: &Reply($client, "$outcome\n", $userinput);
5739: }
5740: } else {
5741: &Failure($client,"export_error\n",$userinput);
5742: }
5743: return 1;
5744: }
5745: ®ister_handler("autoexportgrades", \&auto_export_grades_handler,
5746: 0, 1, 0);
5747:
5748: # Retrieve and remove temporary files created by/during autoenrollment.
5749: #
5750: # Formal Parameters:
5751: # $cmd - The command that got us dispatched.
5752: # $tail - The tail of the command. In our case this is a colon
5753: # separated list that will be split into:
5754: # $filename - The name of the file to retrieve.
5755: # The filename is given as a path relative to
5756: # the LonCAPA temp file directory.
5757: # $client - Socket open on the client.
5758: #
5759: # Returns:
5760: # 1 - Continue processing.
5761: sub retrieve_auto_file_handler {
5762: my ($cmd, $tail, $client) = @_;
5763: my $userinput = "cmd:$tail";
5764:
5765: my ($filename) = split(/:/, $tail);
5766:
5767: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
5768:
5769: if ($filename =~m{/\.\./}) {
5770: &Failure($client, "refused\n", $userinput);
5771: } elsif ($filename !~ /^$LONCAPA::match_domain\_$LONCAPA::match_courseid\_.+_classlist\.xml$/) {
5772: &Failure($client, "refused\n", $userinput);
5773: } elsif ( (-e $source) && ($filename ne '') ) {
5774: my $reply = '';
5775: if (open(my $fh,$source)) {
5776: while (<$fh>) {
5777: chomp($_);
5778: $_ =~ s/^\s+//g;
5779: $_ =~ s/\s+$//g;
5780: $reply .= $_;
5781: }
5782: close($fh);
5783: &Reply($client, &escape($reply)."\n", $userinput);
5784:
5785: # Does this have to be uncommented??!? (RF).
5786: #
5787: # unlink($source);
5788: } else {
5789: &Failure($client, "error\n", $userinput);
5790: }
5791: } else {
5792: &Failure($client, "error\n", $userinput);
5793: }
5794:
5795:
5796: return 1;
5797: }
5798: ®ister_handler("autoretrieve", \&retrieve_auto_file_handler, 0,1,0);
5799:
5800: sub crsreq_checks_handler {
5801: my ($cmd, $tail, $client) = @_;
5802: my $userinput = "$cmd:$tail";
5803: my $dom = $tail;
5804: my $result;
5805: my @reqtypes = ('official','unofficial','community','textbook','placement');
5806: eval {
5807: local($SIG{__DIE__})='DEFAULT';
5808: my %validations;
5809: my $response = &localenroll::crsreq_checks($dom,\@reqtypes,
5810: \%validations);
5811: if ($response eq 'ok') {
5812: foreach my $key (keys(%validations)) {
5813: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($validations{$key}).'&';
5814: }
5815: $result =~ s/\&$//;
5816: } else {
5817: $result = 'error';
5818: }
5819: };
5820: if (!$@) {
5821: &Reply($client, \$result, $userinput);
5822: } else {
5823: &Failure($client,"unknown_cmd\n",$userinput);
5824: }
5825: return 1;
5826: }
5827: ®ister_handler("autocrsreqchecks", \&crsreq_checks_handler, 0, 1, 0);
5828:
5829: sub validate_crsreq_handler {
5830: my ($cmd, $tail, $client) = @_;
5831: my $userinput = "$cmd:$tail";
5832: my ($dom,$owner,$crstype,$inststatuslist,$instcode,$instseclist,$customdata) = split(/:/, $tail);
5833: $instcode = &unescape($instcode);
5834: $owner = &unescape($owner);
5835: $crstype = &unescape($crstype);
5836: $inststatuslist = &unescape($inststatuslist);
5837: $instcode = &unescape($instcode);
5838: $instseclist = &unescape($instseclist);
5839: my $custominfo = &Apache::lonnet::thaw_unescape($customdata);
5840: my $outcome;
5841: eval {
5842: local($SIG{__DIE__})='DEFAULT';
5843: $outcome = &localenroll::validate_crsreq($dom,$owner,$crstype,
5844: $inststatuslist,$instcode,
5845: $instseclist,$custominfo);
5846: };
5847: if (!$@) {
5848: &Reply($client, \$outcome, $userinput);
5849: } else {
5850: &Failure($client,"unknown_cmd\n",$userinput);
5851: }
5852: return 1;
5853: }
5854: ®ister_handler("autocrsreqvalidation", \&validate_crsreq_handler, 0, 1, 0);
5855:
5856: sub crsreq_update_handler {
5857: my ($cmd, $tail, $client) = @_;
5858: my $userinput = "$cmd:$tail";
5859: my ($cdom,$cnum,$crstype,$action,$ownername,$ownerdomain,$fullname,$title,$code,
5860: $accessstart,$accessend,$infohashref) =
5861: split(/:/, $tail);
5862: $crstype = &unescape($crstype);
5863: $action = &unescape($action);
5864: $ownername = &unescape($ownername);
5865: $ownerdomain = &unescape($ownerdomain);
5866: $fullname = &unescape($fullname);
5867: $title = &unescape($title);
5868: $code = &unescape($code);
5869: $accessstart = &unescape($accessstart);
5870: $accessend = &unescape($accessend);
5871: my $incoming = &Apache::lonnet::thaw_unescape($infohashref);
5872: my ($result,$outcome);
5873: eval {
5874: local($SIG{__DIE__})='DEFAULT';
5875: my %rtnhash;
5876: $outcome = &localenroll::crsreq_updates($cdom,$cnum,$crstype,$action,
5877: $ownername,$ownerdomain,$fullname,
5878: $title,$code,$accessstart,$accessend,
5879: $incoming,\%rtnhash);
5880: if ($outcome eq 'ok') {
5881: my @posskeys = qw(createdweb createdmsg createdcustomized createdactions queuedweb queuedmsg formitems reviewweb validationjs onload javascript);
5882: foreach my $key (keys(%rtnhash)) {
5883: if (grep(/^\Q$key\E/,@posskeys)) {
5884: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rtnhash{$key}).'&';
5885: }
5886: }
5887: $result =~ s/\&$//;
5888: }
5889: };
5890: if (!$@) {
5891: if ($outcome eq 'ok') {
5892: &Reply($client, \$result, $userinput);
5893: } else {
5894: &Reply($client, "format_error\n", $userinput);
5895: }
5896: } else {
5897: &Failure($client,"unknown_cmd\n",$userinput);
5898: }
5899: return 1;
5900: }
5901: ®ister_handler("autocrsrequpdate", \&crsreq_update_handler, 0, 1, 0);
5902:
5903: #
5904: # Read and retrieve institutional code format (for support form).
5905: # Formal Parameters:
5906: # $cmd - Command that dispatched us.
5907: # $tail - Tail of the command. In this case it conatins
5908: # the course domain and the coursename.
5909: # $client - Socket open on the client.
5910: # Returns:
5911: # 1 - Continue processing.
5912: #
5913: sub get_institutional_code_format_handler {
5914: my ($cmd, $tail, $client) = @_;
5915: my $userinput = "$cmd:$tail";
5916:
5917: my $reply;
5918: my($cdom,$course) = split(/:/,$tail);
5919: my @pairs = split/\&/,$course;
5920: my %instcodes = ();
5921: my %codes = ();
5922: my @codetitles = ();
5923: my %cat_titles = ();
5924: my %cat_order = ();
5925: foreach (@pairs) {
5926: my ($key,$value) = split/=/,$_;
5927: $instcodes{&unescape($key)} = &unescape($value);
5928: }
5929: my $formatreply = &localenroll::instcode_format($cdom,
5930: \%instcodes,
5931: \%codes,
5932: \@codetitles,
5933: \%cat_titles,
5934: \%cat_order);
5935: if ($formatreply eq 'ok') {
5936: my $codes_str = &Apache::lonnet::hash2str(%codes);
5937: my $codetitles_str = &Apache::lonnet::array2str(@codetitles);
5938: my $cat_titles_str = &Apache::lonnet::hash2str(%cat_titles);
5939: my $cat_order_str = &Apache::lonnet::hash2str(%cat_order);
5940: &Reply($client,
5941: $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'
5942: .$cat_order_str."\n",
5943: $userinput);
5944: } else {
5945: # this else branch added by RF since if not ok, lonc will
5946: # hang waiting on reply until timeout.
5947: #
5948: &Reply($client, "format_error\n", $userinput);
5949: }
5950:
5951: return 1;
5952: }
5953: ®ister_handler("autoinstcodeformat",
5954: \&get_institutional_code_format_handler,0,1,0);
5955:
5956: sub get_institutional_defaults_handler {
5957: my ($cmd, $tail, $client) = @_;
5958: my $userinput = "$cmd:$tail";
5959:
5960: my $dom = $tail;
5961: my %defaults_hash;
5962: my @code_order;
5963: my $outcome;
5964: eval {
5965: local($SIG{__DIE__})='DEFAULT';
5966: $outcome = &localenroll::instcode_defaults($dom,\%defaults_hash,
5967: \@code_order);
5968: };
5969: if (!$@) {
5970: if ($outcome eq 'ok') {
5971: my $result='';
5972: while (my ($key,$value) = each(%defaults_hash)) {
5973: $result.=&escape($key).'='.&escape($value).'&';
5974: }
5975: $result .= 'code_order='.&escape(join('&',@code_order));
5976: &Reply($client,\$result,$userinput);
5977: } else {
5978: &Reply($client,"error\n", $userinput);
5979: }
5980: } else {
5981: &Failure($client,"unknown_cmd\n",$userinput);
5982: }
5983: }
5984: ®ister_handler("autoinstcodedefaults",
5985: \&get_institutional_defaults_handler,0,1,0);
5986:
5987: sub get_possible_instcodes_handler {
5988: my ($cmd, $tail, $client) = @_;
5989: my $userinput = "$cmd:$tail";
5990:
5991: my $reply;
5992: my $cdom = $tail;
5993: my (@codetitles,%cat_titles,%cat_order,@code_order);
5994: my $formatreply = &localenroll::possible_instcodes($cdom,
5995: \@codetitles,
5996: \%cat_titles,
5997: \%cat_order,
5998: \@code_order);
5999: if ($formatreply eq 'ok') {
6000: my $result = join('&',map {&escape($_);} (@codetitles)).':';
6001: $result .= join('&',map {&escape($_);} (@code_order)).':';
6002: foreach my $key (keys(%cat_titles)) {
6003: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($cat_titles{$key}).'&';
6004: }
6005: $result =~ s/\&$//;
6006: $result .= ':';
6007: foreach my $key (keys(%cat_order)) {
6008: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($cat_order{$key}).'&';
6009: }
6010: $result =~ s/\&$//;
6011: &Reply($client,\$result,$userinput);
6012: } else {
6013: &Reply($client, "format_error\n", $userinput);
6014: }
6015: return 1;
6016: }
6017: ®ister_handler("autopossibleinstcodes",
6018: \&get_possible_instcodes_handler,0,1,0);
6019:
6020: sub get_institutional_user_rules {
6021: my ($cmd, $tail, $client) = @_;
6022: my $userinput = "$cmd:$tail";
6023: my $dom = &unescape($tail);
6024: my (%rules_hash,@rules_order);
6025: my $outcome;
6026: eval {
6027: local($SIG{__DIE__})='DEFAULT';
6028: $outcome = &localenroll::username_rules($dom,\%rules_hash,\@rules_order);
6029: };
6030: if (!$@) {
6031: if ($outcome eq 'ok') {
6032: my $result;
6033: foreach my $key (keys(%rules_hash)) {
6034: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
6035: }
6036: $result =~ s/\&$//;
6037: $result .= ':';
6038: if (@rules_order > 0) {
6039: foreach my $item (@rules_order) {
6040: $result .= &escape($item).'&';
6041: }
6042: }
6043: $result =~ s/\&$//;
6044: &Reply($client,\$result,$userinput);
6045: } else {
6046: &Reply($client,"error\n", $userinput);
6047: }
6048: } else {
6049: &Failure($client,"unknown_cmd\n",$userinput);
6050: }
6051: }
6052: ®ister_handler("instuserrules",\&get_institutional_user_rules,0,1,0);
6053:
6054: sub get_institutional_id_rules {
6055: my ($cmd, $tail, $client) = @_;
6056: my $userinput = "$cmd:$tail";
6057: my $dom = &unescape($tail);
6058: my (%rules_hash,@rules_order);
6059: my $outcome;
6060: eval {
6061: local($SIG{__DIE__})='DEFAULT';
6062: $outcome = &localenroll::id_rules($dom,\%rules_hash,\@rules_order);
6063: };
6064: if (!$@) {
6065: if ($outcome eq 'ok') {
6066: my $result;
6067: foreach my $key (keys(%rules_hash)) {
6068: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
6069: }
6070: $result =~ s/\&$//;
6071: $result .= ':';
6072: if (@rules_order > 0) {
6073: foreach my $item (@rules_order) {
6074: $result .= &escape($item).'&';
6075: }
6076: }
6077: $result =~ s/\&$//;
6078: &Reply($client,\$result,$userinput);
6079: } else {
6080: &Reply($client,"error\n", $userinput);
6081: }
6082: } else {
6083: &Failure($client,"unknown_cmd\n",$userinput);
6084: }
6085: }
6086: ®ister_handler("instidrules",\&get_institutional_id_rules,0,1,0);
6087:
6088: sub get_institutional_selfcreate_rules {
6089: my ($cmd, $tail, $client) = @_;
6090: my $userinput = "$cmd:$tail";
6091: my $dom = &unescape($tail);
6092: my (%rules_hash,@rules_order);
6093: my $outcome;
6094: eval {
6095: local($SIG{__DIE__})='DEFAULT';
6096: $outcome = &localenroll::selfcreate_rules($dom,\%rules_hash,\@rules_order);
6097: };
6098: if (!$@) {
6099: if ($outcome eq 'ok') {
6100: my $result;
6101: foreach my $key (keys(%rules_hash)) {
6102: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
6103: }
6104: $result =~ s/\&$//;
6105: $result .= ':';
6106: if (@rules_order > 0) {
6107: foreach my $item (@rules_order) {
6108: $result .= &escape($item).'&';
6109: }
6110: }
6111: $result =~ s/\&$//;
6112: &Reply($client,\$result,$userinput);
6113: } else {
6114: &Reply($client,"error\n", $userinput);
6115: }
6116: } else {
6117: &Failure($client,"unknown_cmd\n",$userinput);
6118: }
6119: }
6120: ®ister_handler("instemailrules",\&get_institutional_selfcreate_rules,0,1,0);
6121:
6122:
6123: sub institutional_username_check {
6124: my ($cmd, $tail, $client) = @_;
6125: my $userinput = "$cmd:$tail";
6126: my %rulecheck;
6127: my $outcome;
6128: my ($udom,$uname,@rules) = split(/:/,$tail);
6129: $udom = &unescape($udom);
6130: $uname = &unescape($uname);
6131: @rules = map {&unescape($_);} (@rules);
6132: eval {
6133: local($SIG{__DIE__})='DEFAULT';
6134: $outcome = &localenroll::username_check($udom,$uname,\@rules,\%rulecheck);
6135: };
6136: if (!$@) {
6137: if ($outcome eq 'ok') {
6138: my $result='';
6139: foreach my $key (keys(%rulecheck)) {
6140: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
6141: }
6142: &Reply($client,\$result,$userinput);
6143: } else {
6144: &Reply($client,"error\n", $userinput);
6145: }
6146: } else {
6147: &Failure($client,"unknown_cmd\n",$userinput);
6148: }
6149: }
6150: ®ister_handler("instrulecheck",\&institutional_username_check,0,1,0);
6151:
6152: sub institutional_id_check {
6153: my ($cmd, $tail, $client) = @_;
6154: my $userinput = "$cmd:$tail";
6155: my %rulecheck;
6156: my $outcome;
6157: my ($udom,$id,@rules) = split(/:/,$tail);
6158: $udom = &unescape($udom);
6159: $id = &unescape($id);
6160: @rules = map {&unescape($_);} (@rules);
6161: eval {
6162: local($SIG{__DIE__})='DEFAULT';
6163: $outcome = &localenroll::id_check($udom,$id,\@rules,\%rulecheck);
6164: };
6165: if (!$@) {
6166: if ($outcome eq 'ok') {
6167: my $result='';
6168: foreach my $key (keys(%rulecheck)) {
6169: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
6170: }
6171: &Reply($client,\$result,$userinput);
6172: } else {
6173: &Reply($client,"error\n", $userinput);
6174: }
6175: } else {
6176: &Failure($client,"unknown_cmd\n",$userinput);
6177: }
6178: }
6179: ®ister_handler("instidrulecheck",\&institutional_id_check,0,1,0);
6180:
6181: sub institutional_selfcreate_check {
6182: my ($cmd, $tail, $client) = @_;
6183: my $userinput = "$cmd:$tail";
6184: my %rulecheck;
6185: my $outcome;
6186: my ($udom,$email,@rules) = split(/:/,$tail);
6187: $udom = &unescape($udom);
6188: $email = &unescape($email);
6189: @rules = map {&unescape($_);} (@rules);
6190: eval {
6191: local($SIG{__DIE__})='DEFAULT';
6192: $outcome = &localenroll::selfcreate_check($udom,$email,\@rules,\%rulecheck);
6193: };
6194: if (!$@) {
6195: if ($outcome eq 'ok') {
6196: my $result='';
6197: foreach my $key (keys(%rulecheck)) {
6198: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
6199: }
6200: &Reply($client,\$result,$userinput);
6201: } else {
6202: &Reply($client,"error\n", $userinput);
6203: }
6204: } else {
6205: &Failure($client,"unknown_cmd\n",$userinput);
6206: }
6207: }
6208: ®ister_handler("instselfcreatecheck",\&institutional_selfcreate_check,0,1,0);
6209:
6210: # Get domain specific conditions for import of student photographs to a course
6211: #
6212: # Retrieves information from photo_permission subroutine in localenroll.
6213: # Returns outcome (ok) if no processing errors, and whether course owner is
6214: # required to accept conditions of use (yes/no).
6215: #
6216: #
6217: sub photo_permission_handler {
6218: my ($cmd, $tail, $client) = @_;
6219: my $userinput = "$cmd:$tail";
6220: my $cdom = $tail;
6221: my ($perm_reqd,$conditions);
6222: my $outcome;
6223: eval {
6224: local($SIG{__DIE__})='DEFAULT';
6225: $outcome = &localenroll::photo_permission($cdom,\$perm_reqd,
6226: \$conditions);
6227: };
6228: if (!$@) {
6229: &Reply($client, &escape($outcome.':'.$perm_reqd.':'. $conditions)."\n",
6230: $userinput);
6231: } else {
6232: &Failure($client,"unknown_cmd\n",$userinput);
6233: }
6234: return 1;
6235: }
6236: ®ister_handler("autophotopermission",\&photo_permission_handler,0,1,0);
6237:
6238: #
6239: # Checks if student photo is available for a user in the domain, in the user's
6240: # directory (in /userfiles/internal/studentphoto.jpg).
6241: # Uses localstudentphoto:fetch() to ensure there is an up to date copy of
6242: # the student's photo.
6243:
6244: sub photo_check_handler {
6245: my ($cmd, $tail, $client) = @_;
6246: my $userinput = "$cmd:$tail";
6247: my ($udom,$uname,$pid) = split(/:/,$tail);
6248: $udom = &unescape($udom);
6249: $uname = &unescape($uname);
6250: $pid = &unescape($pid);
6251: my $path=&propath($udom,$uname).'/userfiles/internal/';
6252: if (!-e $path) {
6253: &mkpath($path);
6254: }
6255: my $response;
6256: my $result = &localstudentphoto::fetch($udom,$uname,$pid,\$response);
6257: $result .= ':'.$response;
6258: &Reply($client, &escape($result)."\n",$userinput);
6259: return 1;
6260: }
6261: ®ister_handler("autophotocheck",\&photo_check_handler,0,1,0);
6262:
6263: #
6264: # Retrieve information from localenroll about whether to provide a button
6265: # for users who have enbled import of student photos to initiate an
6266: # update of photo files for registered students. Also include
6267: # comment to display alongside button.
6268:
6269: sub photo_choice_handler {
6270: my ($cmd, $tail, $client) = @_;
6271: my $userinput = "$cmd:$tail";
6272: my $cdom = &unescape($tail);
6273: my ($update,$comment);
6274: eval {
6275: local($SIG{__DIE__})='DEFAULT';
6276: ($update,$comment) = &localenroll::manager_photo_update($cdom);
6277: };
6278: if (!$@) {
6279: &Reply($client,&escape($update).':'.&escape($comment)."\n",$userinput);
6280: } else {
6281: &Failure($client,"unknown_cmd\n",$userinput);
6282: }
6283: return 1;
6284: }
6285: ®ister_handler("autophotochoice",\&photo_choice_handler,0,1,0);
6286:
6287: #
6288: # Gets a student's photo to exist (in the correct image type) in the user's
6289: # directory.
6290: # Formal Parameters:
6291: # $cmd - The command request that got us dispatched.
6292: # $tail - A colon separated set of words that will be split into:
6293: # $domain - student's domain
6294: # $uname - student username
6295: # $type - image type desired
6296: # $client - The socket open on the client.
6297: # Returns:
6298: # 1 - continue processing.
6299:
6300: sub student_photo_handler {
6301: my ($cmd, $tail, $client) = @_;
6302: my ($domain,$uname,$ext,$type) = split(/:/, $tail);
6303:
6304: my $path=&propath($domain,$uname). '/userfiles/internal/';
6305: my $filename = 'studentphoto.'.$ext;
6306: if ($type eq 'thumbnail') {
6307: $filename = 'studentphoto_tn.'.$ext;
6308: }
6309: if (-e $path.$filename) {
6310: &Reply($client,"ok\n","$cmd:$tail");
6311: return 1;
6312: }
6313: &mkpath($path);
6314: my $file;
6315: if ($type eq 'thumbnail') {
6316: eval {
6317: local($SIG{__DIE__})='DEFAULT';
6318: $file=&localstudentphoto::fetch_thumbnail($domain,$uname);
6319: };
6320: } else {
6321: $file=&localstudentphoto::fetch($domain,$uname);
6322: }
6323: if (!$file) {
6324: &Failure($client,"unavailable\n","$cmd:$tail");
6325: return 1;
6326: }
6327: if (!-e $path.$filename) { &convert_photo($file,$path.$filename); }
6328: if (-e $path.$filename) {
6329: &Reply($client,"ok\n","$cmd:$tail");
6330: return 1;
6331: }
6332: &Failure($client,"unable_to_convert\n","$cmd:$tail");
6333: return 1;
6334: }
6335: ®ister_handler("studentphoto", \&student_photo_handler, 0, 1, 0);
6336:
6337: sub inst_usertypes_handler {
6338: my ($cmd, $domain, $client) = @_;
6339: my $res;
6340: my $userinput = $cmd.":".$domain; # For logging purposes.
6341: my (%typeshash,@order,$result);
6342: eval {
6343: local($SIG{__DIE__})='DEFAULT';
6344: $result=&localenroll::inst_usertypes($domain,\%typeshash,\@order);
6345: };
6346: if ($result eq 'ok') {
6347: if (keys(%typeshash) > 0) {
6348: foreach my $key (keys(%typeshash)) {
6349: $res.=&escape($key).'='.&escape($typeshash{$key}).'&';
6350: }
6351: }
6352: $res=~s/\&$//;
6353: $res .= ':';
6354: if (@order > 0) {
6355: foreach my $item (@order) {
6356: $res .= &escape($item).'&';
6357: }
6358: }
6359: $res=~s/\&$//;
6360: }
6361: &Reply($client, \$res, $userinput);
6362: return 1;
6363: }
6364: ®ister_handler("inst_usertypes", \&inst_usertypes_handler, 0, 1, 0);
6365:
6366: # mkpath makes all directories for a file, expects an absolute path with a
6367: # file or a trailing / if just a dir is passed
6368: # returns 1 on success 0 on failure
6369: sub mkpath {
6370: my ($file)=@_;
6371: my @parts=split(/\//,$file,-1);
6372: my $now=$parts[0].'/'.$parts[1].'/'.$parts[2];
6373: for (my $i=3;$i<= ($#parts-1);$i++) {
6374: $now.='/'.$parts[$i];
6375: if (!-e $now) {
6376: if (!mkdir($now,0770)) { return 0; }
6377: }
6378: }
6379: return 1;
6380: }
6381:
6382: #---------------------------------------------------------------
6383: #
6384: # Getting, decoding and dispatching requests:
6385: #
6386: #
6387: # Get a Request:
6388: # Gets a Request message from the client. The transaction
6389: # is defined as a 'line' of text. We remove the new line
6390: # from the text line.
6391: #
6392: sub get_request {
6393: my $input = <$client>;
6394: chomp($input);
6395:
6396: &Debug("get_request: Request = $input\n");
6397:
6398: &status('Processing '.$clientname.':'.$input);
6399:
6400: return $input;
6401: }
6402: #---------------------------------------------------------------
6403: #
6404: # Process a request. This sub should shrink as each action
6405: # gets farmed out into a separat sub that is registered
6406: # with the dispatch hash.
6407: #
6408: # Parameters:
6409: # user_input - The request received from the client (lonc).
6410: #
6411: # Returns:
6412: # true to keep processing, false if caller should exit.
6413: #
6414: sub process_request {
6415: my ($userinput) = @_; # Easier for now to break style than to
6416: # fix all the userinput -> user_input.
6417: my $wasenc = 0; # True if request was encrypted.
6418: # ------------------------------------------------------------ See if encrypted
6419: # for command
6420: # sethost:<server>
6421: # <command>:<args>
6422: # we just send it to the processor
6423: # for
6424: # sethost:<server>:<command>:<args>
6425: # we do the implict set host and then do the command
6426: if ($userinput =~ /^sethost:/) {
6427: (my $cmd,my $newid,$userinput) = split(':',$userinput,3);
6428: if (defined($userinput)) {
6429: &sethost("$cmd:$newid");
6430: } else {
6431: $userinput = "$cmd:$newid";
6432: }
6433: }
6434:
6435: if ($userinput =~ /^enc/) {
6436: $userinput = decipher($userinput);
6437: $wasenc=1;
6438: if(!$userinput) { # Cipher not defined.
6439: &Failure($client, "error: Encrypted data without negotated key\n");
6440: return 0;
6441: }
6442: }
6443: Debug("process_request: $userinput\n");
6444:
6445: #
6446: # The 'correct way' to add a command to lond is now to
6447: # write a sub to execute it and Add it to the command dispatch
6448: # hash via a call to register_handler.. The comments to that
6449: # sub should give you enough to go on to show how to do this
6450: # along with the examples that are building up as this code
6451: # is getting refactored. Until all branches of the
6452: # if/elseif monster below have been factored out into
6453: # separate procesor subs, if the dispatch hash is missing
6454: # the command keyword, we will fall through to the remainder
6455: # of the if/else chain below in order to keep this thing in
6456: # working order throughout the transmogrification.
6457:
6458: my ($command, $tail) = split(/:/, $userinput, 2);
6459: chomp($command);
6460: chomp($tail);
6461: $tail =~ s/(\r)//; # This helps people debugging with e.g. telnet.
6462: $command =~ s/(\r)//; # And this too for parameterless commands.
6463: if(!$tail) {
6464: $tail =""; # defined but blank.
6465: }
6466:
6467: &Debug("Command received: $command, encoded = $wasenc");
6468:
6469: if(defined $Dispatcher{$command}) {
6470:
6471: my $dispatch_info = $Dispatcher{$command};
6472: my $handler = $$dispatch_info[0];
6473: my $need_encode = $$dispatch_info[1];
6474: my $client_types = $$dispatch_info[2];
6475: Debug("Matched dispatch hash: mustencode: $need_encode "
6476: ."ClientType $client_types");
6477:
6478: # Validate the request:
6479:
6480: my $ok = 1;
6481: my $requesterprivs = 0;
6482: if(&isClient()) {
6483: $requesterprivs |= $CLIENT_OK;
6484: }
6485: if(&isManager()) {
6486: $requesterprivs |= $MANAGER_OK;
6487: }
6488: if($need_encode && (!$wasenc)) {
6489: Debug("Must encode but wasn't: $need_encode $wasenc");
6490: $ok = 0;
6491: }
6492: if(($client_types & $requesterprivs) == 0) {
6493: Debug("Client not privileged to do this operation");
6494: $ok = 0;
6495: }
6496: if ($ok) {
6497: if (ref($trust{$command}) eq 'HASH') {
6498: my $donechecks;
6499: if ($trust{$command}{'anywhere'}) {
6500: $donechecks = 1;
6501: } elsif ($trust{$command}{'manageronly'}) {
6502: unless (&isManager()) {
6503: $ok = 0;
6504: }
6505: $donechecks = 1;
6506: } elsif ($trust{$command}{'institutiononly'}) {
6507: unless ($clientsameinst) {
6508: $ok = 0;
6509: }
6510: $donechecks = 1;
6511: } elsif ($clientsameinst) {
6512: $donechecks = 1;
6513: }
6514: unless ($donechecks) {
6515: foreach my $rule (keys(%{$trust{$command}})) {
6516: next if ($rule eq 'remote');
6517: if ($trust{$command}{$rule}) {
6518: if ($clientprohibited{$rule}) {
6519: $ok = 0;
6520: } else {
6521: $ok = 1;
6522: $donechecks = 1;
6523: last;
6524: }
6525: }
6526: }
6527: }
6528: unless ($donechecks) {
6529: if ($trust{$command}{'remote'}) {
6530: if ($clientremoteok) {
6531: $ok = 1;
6532: } else {
6533: $ok = 0;
6534: }
6535: }
6536: }
6537: }
6538: }
6539:
6540: if($ok) {
6541: Debug("Dispatching to handler $command $tail");
6542: my $keep_going = &$handler($command, $tail, $client);
6543: return $keep_going;
6544: } else {
6545: Debug("Refusing to dispatch because client did not match requirements");
6546: Failure($client, "refused\n", $userinput);
6547: return 1;
6548: }
6549: }
6550:
6551: print $client "unknown_cmd\n";
6552: # -------------------------------------------------------------------- complete
6553: Debug("process_request - returning 1");
6554: return 1;
6555: }
6556: #
6557: # Decipher encoded traffic
6558: # Parameters:
6559: # input - Encoded data.
6560: # Returns:
6561: # Decoded data or undef if encryption key was not yet negotiated.
6562: # Implicit input:
6563: # cipher - This global holds the negotiated encryption key.
6564: #
6565: sub decipher {
6566: my ($input) = @_;
6567: my $output = '';
6568:
6569:
6570: if($cipher) {
6571: my($enc, $enclength, $encinput) = split(/:/, $input);
6572: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
6573: $output .=
6574: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
6575: }
6576: return substr($output, 0, $enclength);
6577: } else {
6578: return undef;
6579: }
6580: }
6581:
6582: #
6583: # Register a command processor. This function is invoked to register a sub
6584: # to process a request. Once registered, the ProcessRequest sub can automatically
6585: # dispatch requests to an appropriate sub, and do the top level validity checking
6586: # as well:
6587: # - Is the keyword recognized.
6588: # - Is the proper client type attempting the request.
6589: # - Is the request encrypted if it has to be.
6590: # Parameters:
6591: # $request_name - Name of the request being registered.
6592: # This is the command request that will match
6593: # against the hash keywords to lookup the information
6594: # associated with the dispatch information.
6595: # $procedure - Reference to a sub to call to process the request.
6596: # All subs get called as follows:
6597: # Procedure($cmd, $tail, $replyfd, $key)
6598: # $cmd - the actual keyword that invoked us.
6599: # $tail - the tail of the request that invoked us.
6600: # $replyfd- File descriptor connected to the client
6601: # $must_encode - True if the request must be encoded to be good.
6602: # $client_ok - True if it's ok for a client to request this.
6603: # $manager_ok - True if it's ok for a manager to request this.
6604: # Side effects:
6605: # - On success, the Dispatcher hash has an entry added for the key $RequestName
6606: # - On failure, the program will die as it's a bad internal bug to try to
6607: # register a duplicate command handler.
6608: #
6609: sub register_handler {
6610: my ($request_name,$procedure,$must_encode, $client_ok,$manager_ok) = @_;
6611:
6612: # Don't allow duplication#
6613:
6614: if (defined $Dispatcher{$request_name}) {
6615: die "Attempting to define a duplicate request handler for $request_name\n";
6616: }
6617: # Build the client type mask:
6618:
6619: my $client_type_mask = 0;
6620: if($client_ok) {
6621: $client_type_mask |= $CLIENT_OK;
6622: }
6623: if($manager_ok) {
6624: $client_type_mask |= $MANAGER_OK;
6625: }
6626:
6627: # Enter the hash:
6628:
6629: my @entry = ($procedure, $must_encode, $client_type_mask);
6630:
6631: $Dispatcher{$request_name} = \@entry;
6632:
6633: }
6634:
6635:
6636: #------------------------------------------------------------------
6637:
6638:
6639:
6640:
6641: #
6642: # Convert an error return code from lcpasswd to a string value.
6643: #
6644: sub lcpasswdstrerror {
6645: my $ErrorCode = shift;
6646: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
6647: return "lcpasswd Unrecognized error return value ".$ErrorCode;
6648: } else {
6649: return $passwderrors[$ErrorCode];
6650: }
6651: }
6652:
6653: # grabs exception and records it to log before exiting
6654: sub catchexception {
6655: my ($error)=@_;
6656: $SIG{'QUIT'}='DEFAULT';
6657: $SIG{__DIE__}='DEFAULT';
6658: &status("Catching exception");
6659: &logthis("<font color='red'>CRITICAL: "
6660: ."ABNORMAL EXIT. Child $$ for server ".$perlvar{'lonHostID'}." died through "
6661: ."a crash with this error msg->[$error]</font>");
6662: &logthis('Famous last words: '.$status.' - '.$lastlog);
6663: if ($client) { print $client "error: $error\n"; }
6664: $server->close();
6665: die($error);
6666: }
6667: sub timeout {
6668: &status("Handling Timeout");
6669: &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
6670: &catchexception('Timeout');
6671: }
6672: # -------------------------------- Set signal handlers to record abnormal exits
6673:
6674:
6675: $SIG{'QUIT'}=\&catchexception;
6676: $SIG{__DIE__}=\&catchexception;
6677:
6678: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
6679: &status("Read loncapa.conf and loncapa_apache.conf");
6680: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
6681: %perlvar=%{$perlvarref};
6682: undef $perlvarref;
6683:
6684: # ----------------------------- Make sure this process is running from user=www
6685: my $wwwid=getpwnam('www');
6686: if ($wwwid!=$<) {
6687: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
6688: my $subj="LON: $currenthostid User ID mismatch";
6689: system("echo 'User ID mismatch. lond must be run as user www.' |\
6690: mailto $emailto -s '$subj' > /dev/null");
6691: exit 1;
6692: }
6693:
6694: # --------------------------------------------- Check if other instance running
6695:
6696: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
6697:
6698: if (-e $pidfile) {
6699: my $lfh=IO::File->new("$pidfile");
6700: my $pide=<$lfh>;
6701: chomp($pide);
6702: if (kill 0 => $pide) { die "already running"; }
6703: }
6704:
6705: # ------------------------------------------------------------- Read hosts file
6706:
6707:
6708:
6709: # establish SERVER socket, bind and listen.
6710: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
6711: Type => SOCK_STREAM,
6712: Proto => 'tcp',
6713: ReuseAddr => 1,
6714: Listen => 10 )
6715: or die "making socket: $@\n";
6716:
6717: # --------------------------------------------------------- Do global variables
6718:
6719: # global variables
6720:
6721: my %children = (); # keys are current child process IDs
6722:
6723: sub REAPER { # takes care of dead children
6724: $SIG{CHLD} = \&REAPER;
6725: &status("Handling child death");
6726: my $pid;
6727: do {
6728: $pid = waitpid(-1,&WNOHANG());
6729: if (defined($children{$pid})) {
6730: &logthis("Child $pid died");
6731: delete($children{$pid});
6732: } elsif ($pid > 0) {
6733: &logthis("Unknown Child $pid died");
6734: }
6735: } while ( $pid > 0 );
6736: foreach my $child (keys(%children)) {
6737: $pid = waitpid($child,&WNOHANG());
6738: if ($pid > 0) {
6739: &logthis("Child $child - $pid looks like we missed it's death");
6740: delete($children{$pid});
6741: }
6742: }
6743: &status("Finished Handling child death");
6744: }
6745:
6746: sub HUNTSMAN { # signal handler for SIGINT
6747: &status("Killing children (INT)");
6748: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
6749: kill 'INT' => keys %children;
6750: &logthis("Free socket: ".shutdown($server,2)); # free up socket
6751: my $execdir=$perlvar{'lonDaemons'};
6752: unlink("$execdir/logs/lond.pid");
6753: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
6754: &status("Done killing children");
6755: exit; # clean up with dignity
6756: }
6757:
6758: sub HUPSMAN { # signal handler for SIGHUP
6759: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
6760: &status("Killing children for restart (HUP)");
6761: kill 'INT' => keys %children;
6762: &logthis("Free socket: ".shutdown($server,2)); # free up socket
6763: &logthis("<font color='red'>CRITICAL: Restarting</font>");
6764: my $execdir=$perlvar{'lonDaemons'};
6765: unlink("$execdir/logs/lond.pid");
6766: &status("Restarting self (HUP)");
6767: exec("$execdir/lond"); # here we go again
6768: }
6769:
6770: #
6771: # Reload the Apache daemon's state.
6772: # This is done by invoking /home/httpd/perl/apachereload
6773: # a setuid perl script that can be root for us to do this job.
6774: #
6775: sub ReloadApache {
6776: # --------------------------- Handle case of another apachereload process (locking)
6777: if (&LONCAPA::try_to_lock('/tmp/lock_apachereload')) {
6778: my $execdir = $perlvar{'lonDaemons'};
6779: my $script = $execdir."/apachereload";
6780: system($script);
6781: unlink('/tmp/lock_apachereload'); # Remove the lock file.
6782: }
6783: }
6784:
6785: #
6786: # Called in response to a USR2 signal.
6787: # - Reread hosts.tab
6788: # - All children connected to hosts that were removed from hosts.tab
6789: # are killed via SIGINT
6790: # - All children connected to previously existing hosts are sent SIGUSR1
6791: # - Our internal hosts hash is updated to reflect the new contents of
6792: # hosts.tab causing connections from hosts added to hosts.tab to
6793: # now be honored.
6794: #
6795: sub UpdateHosts {
6796: &status("Reload hosts.tab");
6797: logthis('<font color="blue"> Updating connections </font>');
6798: #
6799: # The %children hash has the set of IP's we currently have children
6800: # on. These need to be matched against records in the hosts.tab
6801: # Any ip's no longer in the table get killed off they correspond to
6802: # either dropped or changed hosts. Note that the re-read of the table
6803: # will take care of new and changed hosts as connections come into being.
6804:
6805: &Apache::lonnet::reset_hosts_info();
6806:
6807: foreach my $child (keys(%children)) {
6808: my $childip = $children{$child};
6809: if ($childip ne '127.0.0.1'
6810: && !defined(&Apache::lonnet::get_hosts_from_ip($childip))) {
6811: logthis('<font color="blue"> UpdateHosts killing child '
6812: ." $child for ip $childip </font>");
6813: kill('INT', $child);
6814: } else {
6815: logthis('<font color="green"> keeping child for ip '
6816: ." $childip (pid=$child) </font>");
6817: }
6818: }
6819: ReloadApache;
6820: &status("Finished reloading hosts.tab");
6821: }
6822:
6823:
6824: sub checkchildren {
6825: &status("Checking on the children (sending signals)");
6826: &initnewstatus();
6827: &logstatus();
6828: &logthis('Going to check on the children');
6829: my $docdir=$perlvar{'lonDocRoot'};
6830: foreach (sort keys %children) {
6831: #sleep 1;
6832: unless (kill 'USR1' => $_) {
6833: &logthis ('Child '.$_.' is dead');
6834: &logstatus($$.' is dead');
6835: delete($children{$_});
6836: }
6837: }
6838: sleep 5;
6839: $SIG{ALRM} = sub { Debug("timeout");
6840: die "timeout"; };
6841: $SIG{__DIE__} = 'DEFAULT';
6842: &status("Checking on the children (waiting for reports)");
6843: foreach (sort keys %children) {
6844: unless (-e "$docdir/lon-status/londchld/$_.txt") {
6845: eval {
6846: alarm(300);
6847: &logthis('Child '.$_.' did not respond');
6848: kill 9 => $_;
6849: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
6850: #$subj="LON: $currenthostid killed lond process $_";
6851: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
6852: #$execdir=$perlvar{'lonDaemons'};
6853: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
6854: delete($children{$_});
6855: alarm(0);
6856: }
6857: }
6858: }
6859: $SIG{ALRM} = 'DEFAULT';
6860: $SIG{__DIE__} = \&catchexception;
6861: &status("Finished checking children");
6862: &logthis('Finished Checking children');
6863: }
6864:
6865: # --------------------------------------------------------------------- Logging
6866:
6867: sub logthis {
6868: my $message=shift;
6869: my $execdir=$perlvar{'lonDaemons'};
6870: my $fh=IO::File->new(">>$execdir/logs/lond.log");
6871: my $now=time;
6872: my $local=localtime($now);
6873: $lastlog=$local.': '.$message;
6874: print $fh "$local ($$): $message\n";
6875: }
6876:
6877: # ------------------------- Conditional log if $DEBUG true.
6878: sub Debug {
6879: my $message = shift;
6880: if($DEBUG) {
6881: &logthis($message);
6882: }
6883: }
6884:
6885: #
6886: # Sub to do replies to client.. this gives a hook for some
6887: # debug tracing too:
6888: # Parameters:
6889: # fd - File open on client.
6890: # reply - Text to send to client.
6891: # request - Original request from client.
6892: #
6893: #NOTE $reply must be terminated by exactly *one* \n. If $reply is a reference
6894: #this is done automatically ($$reply must not contain any \n in this case).
6895: #If $reply is a string the caller has to ensure this.
6896: sub Reply {
6897: my ($fd, $reply, $request) = @_;
6898: if (ref($reply)) {
6899: print $fd $$reply;
6900: print $fd "\n";
6901: if ($DEBUG) { Debug("Request was $request Reply was $$reply"); }
6902: } else {
6903: print $fd $reply;
6904: if ($DEBUG) { Debug("Request was $request Reply was $reply"); }
6905: }
6906: $Transactions++;
6907: }
6908:
6909:
6910: #
6911: # Sub to report a failure.
6912: # This function:
6913: # - Increments the failure statistic counters.
6914: # - Invokes Reply to send the error message to the client.
6915: # Parameters:
6916: # fd - File descriptor open on the client
6917: # reply - Reply text to emit.
6918: # request - The original request message (used by Reply
6919: # to debug if that's enabled.
6920: # Implicit outputs:
6921: # $Failures- The number of failures is incremented.
6922: # Reply (invoked here) sends a message to the
6923: # client:
6924: #
6925: sub Failure {
6926: my $fd = shift;
6927: my $reply = shift;
6928: my $request = shift;
6929:
6930: $Failures++;
6931: Reply($fd, $reply, $request); # That's simple eh?
6932: }
6933: # ------------------------------------------------------------------ Log status
6934:
6935: sub logstatus {
6936: &status("Doing logging");
6937: my $docdir=$perlvar{'lonDocRoot'};
6938: {
6939: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
6940: print $fh $status."\n".$lastlog."\n".time."\n$keymode";
6941: $fh->close();
6942: }
6943: &status("Finished $$.txt");
6944: {
6945: open(LOG,">>$docdir/lon-status/londstatus.txt");
6946: flock(LOG,LOCK_EX);
6947: print LOG $$."\t".$clientname."\t".$currenthostid."\t"
6948: .$status."\t".$lastlog."\t $keymode\n";
6949: flock(LOG,LOCK_UN);
6950: close(LOG);
6951: }
6952: &status("Finished logging");
6953: }
6954:
6955: sub initnewstatus {
6956: my $docdir=$perlvar{'lonDocRoot'};
6957: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
6958: my $now=time();
6959: my $local=localtime($now);
6960: print $fh "LOND status $local - parent $$\n\n";
6961: opendir(DIR,"$docdir/lon-status/londchld");
6962: while (my $filename=readdir(DIR)) {
6963: unlink("$docdir/lon-status/londchld/$filename");
6964: }
6965: closedir(DIR);
6966: }
6967:
6968: # -------------------------------------------------------------- Status setting
6969:
6970: sub status {
6971: my $what=shift;
6972: my $now=time;
6973: my $local=localtime($now);
6974: $status=$local.': '.$what;
6975: $0='lond: '.$what.' '.$local;
6976: }
6977:
6978: # -------------------------------------------------------------- Talk to lonsql
6979:
6980: sub sql_reply {
6981: my ($cmd)=@_;
6982: my $answer=&sub_sql_reply($cmd);
6983: if ($answer eq 'con_lost') { $answer=&sub_sql_reply($cmd); }
6984: return $answer;
6985: }
6986:
6987: sub sub_sql_reply {
6988: my ($cmd)=@_;
6989: my $unixsock="mysqlsock";
6990: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
6991: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
6992: Type => SOCK_STREAM,
6993: Timeout => 10)
6994: or return "con_lost";
6995: print $sclient "$cmd:$currentdomainid\n";
6996: my $answer=<$sclient>;
6997: chomp($answer);
6998: if (!$answer) { $answer="con_lost"; }
6999: return $answer;
7000: }
7001:
7002: # --------------------------------------- Is this the home server of an author?
7003:
7004: sub ishome {
7005: my $author=shift;
7006: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
7007: my ($udom,$uname)=split(/\//,$author);
7008: my $proname=propath($udom,$uname);
7009: if (-e $proname) {
7010: return 'owner';
7011: } else {
7012: return 'not_owner';
7013: }
7014: }
7015:
7016: # ======================================================= Continue main program
7017: # ---------------------------------------------------- Fork once and dissociate
7018:
7019: my $fpid=fork;
7020: exit if $fpid;
7021: die "Couldn't fork: $!" unless defined ($fpid);
7022:
7023: POSIX::setsid() or die "Can't start new session: $!";
7024:
7025: # ------------------------------------------------------- Write our PID on disk
7026:
7027: my $execdir=$perlvar{'lonDaemons'};
7028: open (PIDSAVE,">$execdir/logs/lond.pid");
7029: print PIDSAVE "$$\n";
7030: close(PIDSAVE);
7031: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
7032: &status('Starting');
7033:
7034:
7035:
7036: # ----------------------------------------------------- Install signal handlers
7037:
7038:
7039: $SIG{CHLD} = \&REAPER;
7040: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
7041: $SIG{HUP} = \&HUPSMAN;
7042: $SIG{USR1} = \&checkchildren;
7043: $SIG{USR2} = \&UpdateHosts;
7044:
7045: # Read the host hashes:
7046: &Apache::lonnet::load_hosts_tab();
7047: my %iphost = &Apache::lonnet::get_iphost(1);
7048:
7049: $dist=`$perlvar{'lonDaemons'}/distprobe`;
7050:
7051: my $arch = `uname -i`;
7052: chomp($arch);
7053: if ($arch eq 'unknown') {
7054: $arch = `uname -m`;
7055: chomp($arch);
7056: }
7057:
7058: # --------------------------------------------------------------
7059: # Accept connections. When a connection comes in, it is validated
7060: # and if good, a child process is created to process transactions
7061: # along the connection.
7062:
7063: while (1) {
7064: &status('Starting accept');
7065: $client = $server->accept() or next;
7066: &status('Accepted '.$client.' off to spawn');
7067: make_new_child($client);
7068: &status('Finished spawning');
7069: }
7070:
7071: sub make_new_child {
7072: my $pid;
7073: # my $cipher; # Now global
7074: my $sigset;
7075:
7076: $client = shift;
7077: &status('Starting new child '.$client);
7078: &logthis('<font color="green"> Attempting to start child ('.$client.
7079: ")</font>");
7080: # block signal for fork
7081: $sigset = POSIX::SigSet->new(SIGINT);
7082: sigprocmask(SIG_BLOCK, $sigset)
7083: or die "Can't block SIGINT for fork: $!\n";
7084:
7085: die "fork: $!" unless defined ($pid = fork);
7086:
7087: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
7088: # connection liveness.
7089:
7090: #
7091: # Figure out who we're talking to so we can record the peer in
7092: # the pid hash.
7093: #
7094: my $caller = getpeername($client);
7095: my ($port,$iaddr);
7096: if (defined($caller) && length($caller) > 0) {
7097: ($port,$iaddr)=unpack_sockaddr_in($caller);
7098: } else {
7099: &logthis("Unable to determine who caller was, getpeername returned nothing");
7100: }
7101: if (defined($iaddr)) {
7102: $clientip = inet_ntoa($iaddr);
7103: Debug("Connected with $clientip");
7104: } else {
7105: &logthis("Unable to determine clientip");
7106: $clientip='Unavailable';
7107: }
7108:
7109: if ($pid) {
7110: # Parent records the child's birth and returns.
7111: sigprocmask(SIG_UNBLOCK, $sigset)
7112: or die "Can't unblock SIGINT for fork: $!\n";
7113: $children{$pid} = $clientip;
7114: &status('Started child '.$pid);
7115: close($client);
7116: return;
7117: } else {
7118: # Child can *not* return from this subroutine.
7119: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
7120: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
7121: #don't get intercepted
7122: $SIG{USR1}= \&logstatus;
7123: $SIG{ALRM}= \&timeout;
7124: #
7125: # Block sigpipe as it gets thrownon socket disconnect and we want to
7126: # deal with that as a read faiure instead.
7127: #
7128: my $blockset = POSIX::SigSet->new(SIGPIPE);
7129: sigprocmask(SIG_BLOCK, $blockset);
7130:
7131: $lastlog='Forked ';
7132: $status='Forked';
7133:
7134: # unblock signals
7135: sigprocmask(SIG_UNBLOCK, $sigset)
7136: or die "Can't unblock SIGINT for fork: $!\n";
7137:
7138: # my $tmpsnum=0; # Now global
7139: #---------------------------------------------------- kerberos 5 initialization
7140: &Authen::Krb5::init_context();
7141:
7142: my $no_ets;
7143: if ($dist =~ /^(?:centos|rhes|scientific)(\d+)$/) {
7144: if ($1 >= 7) {
7145: $no_ets = 1;
7146: }
7147: } elsif ($dist =~ /^suse(\d+\.\d+)$/) {
7148: if (($1 eq '9.3') || ($1 >= 12.2)) {
7149: $no_ets = 1;
7150: }
7151: } elsif ($dist =~ /^sles(\d+)$/) {
7152: if ($1 > 11) {
7153: $no_ets = 1;
7154: }
7155: } elsif ($dist =~ /^fedora(\d+)$/) {
7156: if ($1 < 7) {
7157: $no_ets = 1;
7158: }
7159: }
7160: unless ($no_ets) {
7161: &Authen::Krb5::init_ets();
7162: }
7163:
7164: &status('Accepted connection');
7165: # =============================================================================
7166: # do something with the connection
7167: # -----------------------------------------------------------------------------
7168: # see if we know client and 'check' for spoof IP by ineffective challenge
7169:
7170: my $outsideip=$clientip;
7171: if ($clientip eq '127.0.0.1') {
7172: $outsideip=&Apache::lonnet::get_host_ip($perlvar{'lonHostID'});
7173: }
7174: &ReadManagerTable();
7175: my $clientrec=defined(&Apache::lonnet::get_hosts_from_ip($outsideip));
7176: my $ismanager=($managers{$outsideip} ne undef);
7177: $clientname = "[unknown]";
7178: if($clientrec) { # Establish client type.
7179: $ConnectionType = "client";
7180: $clientname = (&Apache::lonnet::get_hosts_from_ip($outsideip))[-1];
7181: if($ismanager) {
7182: $ConnectionType = "both";
7183: }
7184: } else {
7185: $ConnectionType = "manager";
7186: $clientname = $managers{$outsideip};
7187: }
7188: my $clientok;
7189:
7190: if ($clientrec || $ismanager) {
7191: &status("Waiting for init from $clientip $clientname");
7192: &logthis('<font color="yellow">INFO: Connection, '.
7193: $clientip.
7194: " ($clientname) connection type = $ConnectionType </font>" );
7195: &status("Connecting $clientip ($clientname))");
7196: my $remotereq=<$client>;
7197: chomp($remotereq);
7198: Debug("Got init: $remotereq");
7199:
7200: if ($remotereq =~ /^init/) {
7201: &sethost("sethost:$perlvar{'lonHostID'}");
7202: #
7203: # If the remote is attempting a local init... give that a try:
7204: #
7205: (my $i, my $inittype, $clientversion) = split(/:/, $remotereq);
7206: # For LON-CAPA 2.9, the client session will have sent its LON-CAPA
7207: # version when initiating the connection. For LON-CAPA 2.8 and older,
7208: # the version is retrieved from the global %loncaparevs in lonnet.pm.
7209: # $clientversion contains path to keyfile if $inittype eq 'local'
7210: # it's overridden below in this case
7211: $clientversion ||= $Apache::lonnet::loncaparevs{$clientname};
7212:
7213: # If the connection type is ssl, but I didn't get my
7214: # certificate files yet, then I'll drop back to
7215: # insecure (if allowed).
7216:
7217: if($inittype eq "ssl") {
7218: my ($ca, $cert) = lonssl::CertificateFile;
7219: my $kfile = lonssl::KeyFile;
7220: if((!$ca) ||
7221: (!$cert) ||
7222: (!$kfile)) {
7223: $inittype = ""; # This forces insecure attempt.
7224: &logthis("<font color=\"blue\"> Certificates not "
7225: ."installed -- trying insecure auth</font>");
7226: } else { # SSL certificates are in place so
7227: } # Leave the inittype alone.
7228: }
7229:
7230: if($inittype eq "local") {
7231: $clientversion = $perlvar{'lonVersion'};
7232: my $key = LocalConnection($client, $remotereq);
7233: if($key) {
7234: Debug("Got local key $key");
7235: $clientok = 1;
7236: my $cipherkey = pack("H32", $key);
7237: $cipher = new IDEA($cipherkey);
7238: print $client "ok:local\n";
7239: &logthis('<font color="green">'
7240: . "Successful local authentication </font>");
7241: $keymode = "local"
7242: } else {
7243: Debug("Failed to get local key");
7244: $clientok = 0;
7245: shutdown($client, 3);
7246: close $client;
7247: }
7248: } elsif ($inittype eq "ssl") {
7249: my $key = SSLConnection($client);
7250: if ($key) {
7251: $clientok = 1;
7252: my $cipherkey = pack("H32", $key);
7253: $cipher = new IDEA($cipherkey);
7254: &logthis('<font color="green">'
7255: ."Successfull ssl authentication with $clientname </font>");
7256: $keymode = "ssl";
7257:
7258: } else {
7259: $clientok = 0;
7260: close $client;
7261: }
7262:
7263: } else {
7264: my $ok = InsecureConnection($client);
7265: if($ok) {
7266: $clientok = 1;
7267: &logthis('<font color="green">'
7268: ."Successful insecure authentication with $clientname </font>");
7269: print $client "ok\n";
7270: $keymode = "insecure";
7271: } else {
7272: &logthis('<font color="yellow">'
7273: ."Attempted insecure connection disallowed </font>");
7274: close $client;
7275: $clientok = 0;
7276:
7277: }
7278: }
7279: } else {
7280: &logthis(
7281: "<font color='blue'>WARNING: "
7282: ."$clientip failed to initialize: >$remotereq< </font>");
7283: &status('No init '.$clientip);
7284: }
7285:
7286: } else {
7287: &logthis(
7288: "<font color='blue'>WARNING: Unknown client $clientip</font>");
7289: &status('Hung up on '.$clientip);
7290: }
7291:
7292: if ($clientok) {
7293: # ---------------- New known client connecting, could mean machine online again
7294: if (&Apache::lonnet::get_host_ip($currenthostid) ne $clientip
7295: && $clientip ne '127.0.0.1') {
7296: &Apache::lonnet::reconlonc($clientname);
7297: }
7298: &logthis("<font color='green'>Established connection: $clientname</font>");
7299: &status('Will listen to '.$clientname);
7300: # ------------------------------------------------------------ Process requests
7301: my $keep_going = 1;
7302: my $user_input;
7303: my $clienthost = &Apache::lonnet::hostname($clientname);
7304: my $clientserverhomeID = &Apache::lonnet::get_server_homeID($clienthost);
7305: $clienthomedom = &Apache::lonnet::host_domain($clientserverhomeID);
7306: $clientintdom = &Apache::lonnet::internet_dom($clientserverhomeID);
7307: $clientsameinst = 0;
7308: if ($clientintdom ne '') {
7309: my $internet_names = &Apache::lonnet::get_internet_names($currenthostid);
7310: if (ref($internet_names) eq 'ARRAY') {
7311: if (grep(/^\Q$clientintdom\E$/,@{$internet_names})) {
7312: $clientsameinst = 1;
7313: }
7314: }
7315: }
7316: $clientremoteok = 0;
7317: unless ($clientsameinst) {
7318: $clientremoteok = 1;
7319: my $defdom = &Apache::lonnet::host_domain($perlvar{'lonHostID'});
7320: %clientprohibited = &get_prohibited($defdom);
7321: if ($clientintdom) {
7322: my $remsessconf = &get_usersession_config($defdom,'remotesession');
7323: if (ref($remsessconf) eq 'HASH') {
7324: if (ref($remsessconf->{'remote'}) eq 'HASH') {
7325: if (ref($remsessconf->{'remote'}->{'excludedomain'}) eq 'ARRAY') {
7326: if (grep(/^\Q$clientintdom\E$/,@{$remsessconf->{'remote'}->{'excludedomain'}})) {
7327: $clientremoteok = 0;
7328: }
7329: }
7330: if (ref($remsessconf->{'remote'}->{'includedomain'}) eq 'ARRAY') {
7331: if (grep(/^\Q$clientintdom\E$/,@{$remsessconf->{'remote'}->{'includedomain'}})) {
7332: $clientremoteok = 1;
7333: } else {
7334: $clientremoteok = 0;
7335: }
7336: }
7337: }
7338: }
7339: }
7340: }
7341: while(($user_input = get_request) && $keep_going) {
7342: alarm(120);
7343: Debug("Main: Got $user_input\n");
7344: $keep_going = &process_request($user_input);
7345: alarm(0);
7346: &status('Listening to '.$clientname." ($keymode)");
7347: }
7348:
7349: # --------------------------------------------- client unknown or fishy, refuse
7350: } else {
7351: print $client "refused\n";
7352: $client->close();
7353: &logthis("<font color='blue'>WARNING: "
7354: ."Rejected client $clientip, closing connection</font>");
7355: }
7356: }
7357:
7358: # =============================================================================
7359:
7360: &logthis("<font color='red'>CRITICAL: "
7361: ."Disconnect from $clientip ($clientname)</font>");
7362:
7363:
7364: # this exit is VERY important, otherwise the child will become
7365: # a producer of more and more children, forking yourself into
7366: # process death.
7367: exit;
7368:
7369: }
7370: #
7371: # Determine if a user is an author for the indicated domain.
7372: #
7373: # Parameters:
7374: # domain - domain to check in .
7375: # user - Name of user to check.
7376: #
7377: # Return:
7378: # 1 - User is an author for domain.
7379: # 0 - User is not an author for domain.
7380: sub is_author {
7381: my ($domain, $user) = @_;
7382:
7383: &Debug("is_author: $user @ $domain");
7384:
7385: my $hashref = &tie_user_hash($domain, $user, "roles",
7386: &GDBM_READER());
7387:
7388: # Author role should show up as a key /domain/_au
7389:
7390: my $value;
7391: if ($hashref) {
7392:
7393: my $key = "/$domain/_au";
7394: if (defined($hashref)) {
7395: $value = $hashref->{$key};
7396: if(!untie_user_hash($hashref)) {
7397: return 'error: ' . ($!+0)." untie (GDBM) Failed";
7398: }
7399: }
7400:
7401: if(defined($value)) {
7402: &Debug("$user @ $domain is an author");
7403: }
7404: } else {
7405: return 'error: '.($!+0)." tie (GDBM) Failed";
7406: }
7407:
7408: return defined($value);
7409: }
7410: #
7411: # Checks to see if the input roleput request was to set
7412: # an author role. If so, creates construction space
7413: # Parameters:
7414: # request - The request sent to the rolesput subchunk.
7415: # We're looking for /domain/_au
7416: # domain - The domain in which the user is having roles doctored.
7417: # user - Name of the user for which the role is being put.
7418: # authtype - The authentication type associated with the user.
7419: #
7420: sub manage_permissions {
7421: my ($request, $domain, $user, $authtype) = @_;
7422: # See if the request is of the form /$domain/_au
7423: if($request =~ /^(\/\Q$domain\E\/_au)$/) { # It's an author rolesput...
7424: my $path=$perlvar{'lonDocRoot'}."/priv/$domain";
7425: unless (-e $path) {
7426: mkdir($path);
7427: }
7428: unless (-e $path.'/'.$user) {
7429: mkdir($path.'/'.$user);
7430: }
7431: }
7432: }
7433:
7434:
7435: #
7436: # Return the full path of a user password file, whether it exists or not.
7437: # Parameters:
7438: # domain - Domain in which the password file lives.
7439: # user - name of the user.
7440: # Returns:
7441: # Full passwd path:
7442: #
7443: sub password_path {
7444: my ($domain, $user) = @_;
7445: return &propath($domain, $user).'/passwd';
7446: }
7447:
7448: # Password Filename
7449: # Returns the path to a passwd file given domain and user... only if
7450: # it exists.
7451: # Parameters:
7452: # domain - Domain in which to search.
7453: # user - username.
7454: # Returns:
7455: # - If the password file exists returns its path.
7456: # - If the password file does not exist, returns undefined.
7457: #
7458: sub password_filename {
7459: my ($domain, $user) = @_;
7460:
7461: Debug ("PasswordFilename called: dom = $domain user = $user");
7462:
7463: my $path = &password_path($domain, $user);
7464: Debug("PasswordFilename got path: $path");
7465: if(-e $path) {
7466: return $path;
7467: } else {
7468: return undef;
7469: }
7470: }
7471:
7472: #
7473: # Rewrite the contents of the user's passwd file.
7474: # Parameters:
7475: # domain - domain of the user.
7476: # name - User's name.
7477: # contents - New contents of the file.
7478: # Returns:
7479: # 0 - Failed.
7480: # 1 - Success.
7481: #
7482: sub rewrite_password_file {
7483: my ($domain, $user, $contents) = @_;
7484:
7485: my $file = &password_filename($domain, $user);
7486: if (defined $file) {
7487: my $pf = IO::File->new(">$file");
7488: if($pf) {
7489: print $pf "$contents\n";
7490: return 1;
7491: } else {
7492: return 0;
7493: }
7494: } else {
7495: return 0;
7496: }
7497:
7498: }
7499:
7500: #
7501: # get_auth_type - Determines the authorization type of a user in a domain.
7502:
7503: # Returns the authorization type or nouser if there is no such user.
7504: #
7505: sub get_auth_type {
7506: my ($domain, $user) = @_;
7507:
7508: Debug("get_auth_type( $domain, $user ) \n");
7509: my $proname = &propath($domain, $user);
7510: my $passwdfile = "$proname/passwd";
7511: if( -e $passwdfile ) {
7512: my $pf = IO::File->new($passwdfile);
7513: my $realpassword = <$pf>;
7514: chomp($realpassword);
7515: Debug("Password info = $realpassword\n");
7516: my ($authtype, $contentpwd) = split(/:/, $realpassword);
7517: Debug("Authtype = $authtype, content = $contentpwd\n");
7518: return "$authtype:$contentpwd";
7519: } else {
7520: Debug("Returning nouser");
7521: return "nouser";
7522: }
7523: }
7524:
7525: #
7526: # Validate a user given their domain, name and password. This utility
7527: # function is used by both AuthenticateHandler and ChangePasswordHandler
7528: # to validate the login credentials of a user.
7529: # Parameters:
7530: # $domain - The domain being logged into (this is required due to
7531: # the capability for multihomed systems.
7532: # $user - The name of the user being validated.
7533: # $password - The user's propoposed password.
7534: #
7535: # Returns:
7536: # 1 - The domain,user,pasword triplet corresponds to a valid
7537: # user.
7538: # 0 - The domain,user,password triplet is not a valid user.
7539: #
7540: sub validate_user {
7541: my ($domain, $user, $password, $checkdefauth) = @_;
7542:
7543: # Why negative ~pi you may well ask? Well this function is about
7544: # authentication, and therefore very important to get right.
7545: # I've initialized the flag that determines whether or not I've
7546: # validated correctly to a value it's not supposed to get.
7547: # At the end of this function. I'll ensure that it's not still that
7548: # value so we don't just wind up returning some accidental value
7549: # as a result of executing an unforseen code path that
7550: # did not set $validated. At the end of valid execution paths,
7551: # validated shoule be 1 for success or 0 for failuer.
7552:
7553: my $validated = -3.14159;
7554:
7555: # How we authenticate is determined by the type of authentication
7556: # the user has been assigned. If the authentication type is
7557: # "nouser", the user does not exist so we will return 0.
7558:
7559: my $contents = &get_auth_type($domain, $user);
7560: my ($howpwd, $contentpwd) = split(/:/, $contents);
7561:
7562: my $null = pack("C",0); # Used by kerberos auth types.
7563:
7564: if ($howpwd eq 'nouser') {
7565: if ($checkdefauth) {
7566: my %domdefaults = &Apache::lonnet::get_domain_defaults($domain);
7567: if ($domdefaults{'auth_def'} eq 'localauth') {
7568: $howpwd = $domdefaults{'auth_def'};
7569: $contentpwd = $domdefaults{'auth_arg_def'};
7570: } elsif ((($domdefaults{'auth_def'} eq 'krb4') ||
7571: ($domdefaults{'auth_def'} eq 'krb5')) &&
7572: ($domdefaults{'auth_arg_def'} ne '')) {
7573: $howpwd = $domdefaults{'auth_def'};
7574: $contentpwd = $domdefaults{'auth_arg_def'};
7575: }
7576: }
7577: }
7578: if ($howpwd ne 'nouser') {
7579: if($howpwd eq "internal") { # Encrypted is in local password file.
7580: if (length($contentpwd) == 13) {
7581: $validated = (crypt($password,$contentpwd) eq $contentpwd);
7582: if ($validated) {
7583: my $ncpass = &hash_passwd($domain,$password);
7584: if (&rewrite_password_file($domain,$user,"$howpwd:$ncpass")) {
7585: &update_passwd_history($user,$domain,$howpwd,'conversion');
7586: &logthis("Validated password hashed with bcrypt for $user:$domain");
7587: }
7588: }
7589: } else {
7590: $validated = &check_internal_passwd($password,$contentpwd,$domain);
7591: }
7592: }
7593: elsif ($howpwd eq "unix") { # User is a normal unix user.
7594: $contentpwd = (getpwnam($user))[1];
7595: if($contentpwd) {
7596: if($contentpwd eq 'x') { # Shadow password file...
7597: my $pwauth_path = "/usr/local/sbin/pwauth";
7598: open PWAUTH, "|$pwauth_path" or
7599: die "Cannot invoke authentication";
7600: print PWAUTH "$user\n$password\n";
7601: close PWAUTH;
7602: $validated = ! $?;
7603:
7604: } else { # Passwords in /etc/passwd.
7605: $validated = (crypt($password,
7606: $contentpwd) eq $contentpwd);
7607: }
7608: } else {
7609: $validated = 0;
7610: }
7611: } elsif ($howpwd eq "krb4") { # user is in kerberos 4 auth. domain.
7612: my $checkwithkrb5 = 0;
7613: if ($dist =~/^fedora(\d+)$/) {
7614: if ($1 > 11) {
7615: $checkwithkrb5 = 1;
7616: }
7617: } elsif ($dist =~ /^suse([\d.]+)$/) {
7618: if ($1 > 11.1) {
7619: $checkwithkrb5 = 1;
7620: }
7621: }
7622: if ($checkwithkrb5) {
7623: $validated = &krb5_authen($password,$null,$user,$contentpwd);
7624: } else {
7625: $validated = &krb4_authen($password,$null,$user,$contentpwd);
7626: }
7627: } elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain.
7628: $validated = &krb5_authen($password,$null,$user,$contentpwd);
7629: } elsif ($howpwd eq "localauth") {
7630: # Authenticate via installation specific authentcation method:
7631: $validated = &localauth::localauth($user,
7632: $password,
7633: $contentpwd,
7634: $domain);
7635: if ($validated < 0) {
7636: &logthis("localauth for $contentpwd $user:$domain returned a $validated");
7637: $validated = 0;
7638: }
7639: } else { # Unrecognized auth is also bad.
7640: $validated = 0;
7641: }
7642: } else {
7643: $validated = 0;
7644: }
7645: #
7646: # $validated has the correct stat of the authentication:
7647: #
7648:
7649: unless ($validated != -3.14159) {
7650: # I >really really< want to know if this happens.
7651: # since it indicates that user authentication is badly
7652: # broken in some code path.
7653: #
7654: die "ValidateUser - failed to set the value of validated $domain, $user $password";
7655: }
7656: return $validated;
7657: }
7658:
7659: sub check_internal_passwd {
7660: my ($plainpass,$stored,$domain) = @_;
7661: my (undef,$method,@rest) = split(/!/,$stored);
7662: if ($method eq "bcrypt") {
7663: my $result = &hash_passwd($domain,$plainpass,@rest);
7664: if ($result ne $stored) {
7665: return 0;
7666: }
7667: # Upgrade to a larger number of rounds if necessary
7668: my $defaultcost;
7669: my %domconfig =
7670: &Apache::lonnet::get_dom('configuration',['password'],$domain);
7671: if (ref($domconfig{'password'}) eq 'HASH') {
7672: $defaultcost = $domconfig{'password'}{'cost'};
7673: }
7674: if (($defaultcost eq '') || ($defaultcost =~ /D/)) {
7675: $defaultcost = 10;
7676: }
7677: return 1 unless($rest[0]<$defaultcost);
7678: }
7679: return 0;
7680: }
7681:
7682: sub get_last_authchg {
7683: my ($domain,$user) = @_;
7684: my $lastmod;
7685: my $logname = &propath($domain,$user).'/passwd.log';
7686: if (-e "$logname") {
7687: $lastmod = (stat("$logname"))[9];
7688: }
7689: return $lastmod;
7690: }
7691:
7692: sub krb4_authen {
7693: my ($password,$null,$user,$contentpwd) = @_;
7694: my $validated = 0;
7695: if (!($password =~ /$null/) ) { # Null password not allowed.
7696: eval {
7697: require Authen::Krb4;
7698: };
7699: if (!$@) {
7700: my $k4error = &Authen::Krb4::get_pw_in_tkt($user,
7701: "",
7702: $contentpwd,,
7703: 'krbtgt',
7704: $contentpwd,
7705: 1,
7706: $password);
7707: if(!$k4error) {
7708: $validated = 1;
7709: } else {
7710: $validated = 0;
7711: &logthis('krb4: '.$user.', '.$contentpwd.', '.
7712: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
7713: }
7714: } else {
7715: $validated = krb5_authen($password,$null,$user,$contentpwd);
7716: }
7717: }
7718: return $validated;
7719: }
7720:
7721: sub krb5_authen {
7722: my ($password,$null,$user,$contentpwd) = @_;
7723: my $validated = 0;
7724: if(!($password =~ /$null/)) { # Null password not allowed.
7725: my $krbclient = &Authen::Krb5::parse_name($user.'@'
7726: .$contentpwd);
7727: my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd;
7728: my $krbserver = &Authen::Krb5::parse_name($krbservice);
7729: my $credentials= &Authen::Krb5::cc_default();
7730: $credentials->initialize(&Authen::Krb5::parse_name($user.'@'
7731: .$contentpwd));
7732: my $krbreturn;
7733: if (exists(&Authen::Krb5::get_init_creds_password)) {
7734: $krbreturn =
7735: &Authen::Krb5::get_init_creds_password($krbclient,$password,
7736: $krbservice);
7737: $validated = (ref($krbreturn) eq 'Authen::Krb5::Creds');
7738: } else {
7739: $krbreturn =
7740: &Authen::Krb5::get_in_tkt_with_password($krbclient,$krbserver,
7741: $password,$credentials);
7742: $validated = ($krbreturn == 1);
7743: }
7744: if (!$validated) {
7745: &logthis('krb5: '.$user.', '.$contentpwd.', '.
7746: &Authen::Krb5::error());
7747: }
7748: }
7749: return $validated;
7750: }
7751:
7752: sub addline {
7753: my ($fname,$hostid,$ip,$newline)=@_;
7754: my $contents;
7755: my $found=0;
7756: my $expr='^'.quotemeta($hostid).':'.quotemeta($ip).':';
7757: my $sh;
7758: if ($sh=IO::File->new("$fname.subscription")) {
7759: while (my $subline=<$sh>) {
7760: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
7761: }
7762: $sh->close();
7763: }
7764: $sh=IO::File->new(">$fname.subscription");
7765: if ($contents) { print $sh $contents; }
7766: if ($newline) { print $sh $newline; }
7767: $sh->close();
7768: return $found;
7769: }
7770:
7771: sub get_chat {
7772: my ($cdom,$cname,$udom,$uname,$group)=@_;
7773:
7774: my @entries=();
7775: my $namespace = 'nohist_chatroom';
7776: my $namespace_inroom = 'nohist_inchatroom';
7777: if ($group ne '') {
7778: $namespace .= '_'.$group;
7779: $namespace_inroom .= '_'.$group;
7780: }
7781: my $hashref = &tie_user_hash($cdom, $cname, $namespace,
7782: &GDBM_READER());
7783: if ($hashref) {
7784: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
7785: &untie_user_hash($hashref);
7786: }
7787: my @participants=();
7788: my $cutoff=time-60;
7789: $hashref = &tie_user_hash($cdom, $cname, $namespace_inroom,
7790: &GDBM_WRCREAT());
7791: if ($hashref) {
7792: $hashref->{$uname.':'.$udom}=time;
7793: foreach my $user (sort(keys(%$hashref))) {
7794: if ($hashref->{$user}>$cutoff) {
7795: push(@participants, 'active_participant:'.$user);
7796: }
7797: }
7798: &untie_user_hash($hashref);
7799: }
7800: return (@participants,@entries);
7801: }
7802:
7803: sub chat_add {
7804: my ($cdom,$cname,$newchat,$group)=@_;
7805: my @entries=();
7806: my $time=time;
7807: my $namespace = 'nohist_chatroom';
7808: my $logfile = 'chatroom.log';
7809: if ($group ne '') {
7810: $namespace .= '_'.$group;
7811: $logfile = 'chatroom_'.$group.'.log';
7812: }
7813: my $hashref = &tie_user_hash($cdom, $cname, $namespace,
7814: &GDBM_WRCREAT());
7815: if ($hashref) {
7816: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
7817: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
7818: my ($thentime,$idnum)=split(/\_/,$lastid);
7819: my $newid=$time.'_000000';
7820: if ($thentime==$time) {
7821: $idnum=~s/^0+//;
7822: $idnum++;
7823: $idnum=substr('000000'.$idnum,-6,6);
7824: $newid=$time.'_'.$idnum;
7825: }
7826: $hashref->{$newid}=$newchat;
7827: my $expired=$time-3600;
7828: foreach my $comment (keys(%$hashref)) {
7829: my ($thistime) = ($comment=~/(\d+)\_/);
7830: if ($thistime<$expired) {
7831: delete $hashref->{$comment};
7832: }
7833: }
7834: {
7835: my $proname=&propath($cdom,$cname);
7836: if (open(CHATLOG,">>$proname/$logfile")) {
7837: print CHATLOG ("$time:".&unescape($newchat)."\n");
7838: }
7839: close(CHATLOG);
7840: }
7841: &untie_user_hash($hashref);
7842: }
7843: }
7844:
7845: sub unsub {
7846: my ($fname,$clientip)=@_;
7847: my $result;
7848: my $unsubs = 0; # Number of successful unsubscribes:
7849:
7850:
7851: # An old way subscriptions were handled was to have a
7852: # subscription marker file:
7853:
7854: Debug("Attempting unlink of $fname.$clientname");
7855: if (unlink("$fname.$clientname")) {
7856: $unsubs++; # Successful unsub via marker file.
7857: }
7858:
7859: # The more modern way to do it is to have a subscription list
7860: # file:
7861:
7862: if (-e "$fname.subscription") {
7863: my $found=&addline($fname,$clientname,$clientip,'');
7864: if ($found) {
7865: $unsubs++;
7866: }
7867: }
7868:
7869: # If either or both of these mechanisms succeeded in unsubscribing a
7870: # resource we can return ok:
7871:
7872: if($unsubs) {
7873: $result = "ok\n";
7874: } else {
7875: $result = "not_subscribed\n";
7876: }
7877:
7878: return $result;
7879: }
7880:
7881: sub currentversion {
7882: my $fname=shift;
7883: my $version=-1;
7884: my $ulsdir='';
7885: if ($fname=~/^(.+)\/[^\/]+$/) {
7886: $ulsdir=$1;
7887: }
7888: my ($fnamere1,$fnamere2);
7889: # remove version if already specified
7890: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
7891: # get the bits that go before and after the version number
7892: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
7893: $fnamere1=$1;
7894: $fnamere2='.'.$2;
7895: }
7896: if (-e $fname) { $version=1; }
7897: if (-e $ulsdir) {
7898: if(-d $ulsdir) {
7899: if (opendir(LSDIR,$ulsdir)) {
7900: my $ulsfn;
7901: while ($ulsfn=readdir(LSDIR)) {
7902: # see if this is a regular file (ignore links produced earlier)
7903: my $thisfile=$ulsdir.'/'.$ulsfn;
7904: unless (-l $thisfile) {
7905: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
7906: if ($1>$version) { $version=$1; }
7907: }
7908: }
7909: }
7910: closedir(LSDIR);
7911: $version++;
7912: }
7913: }
7914: }
7915: return $version;
7916: }
7917:
7918: sub thisversion {
7919: my $fname=shift;
7920: my $version=-1;
7921: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
7922: $version=$1;
7923: }
7924: return $version;
7925: }
7926:
7927: sub subscribe {
7928: my ($userinput,$clientip)=@_;
7929: my $result;
7930: my ($cmd,$fname)=split(/:/,$userinput,2);
7931: my $ownership=&ishome($fname);
7932: if ($ownership eq 'owner') {
7933: # explitly asking for the current version?
7934: unless (-e $fname) {
7935: my $currentversion=¤tversion($fname);
7936: if (&thisversion($fname)==$currentversion) {
7937: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
7938: my $root=$1;
7939: my $extension=$2;
7940: symlink($root.'.'.$extension,
7941: $root.'.'.$currentversion.'.'.$extension);
7942: unless ($extension=~/\.meta$/) {
7943: symlink($root.'.'.$extension.'.meta',
7944: $root.'.'.$currentversion.'.'.$extension.'.meta');
7945: }
7946: }
7947: }
7948: }
7949: if (-e $fname) {
7950: if (-d $fname) {
7951: $result="directory\n";
7952: } else {
7953: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
7954: my $now=time;
7955: my $found=&addline($fname,$clientname,$clientip,
7956: "$clientname:$clientip:$now\n");
7957: if ($found) { $result="$fname\n"; }
7958: # if they were subscribed to only meta data, delete that
7959: # subscription, when you subscribe to a file you also get
7960: # the metadata
7961: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
7962: $fname=~s/\/home\/httpd\/html\/res/raw/;
7963: my $protocol = $Apache::lonnet::protocol{$perlvar{'lonHostID'}};
7964: $protocol = 'http' if ($protocol ne 'https');
7965: $fname=$protocol.'://'.&Apache::lonnet::hostname($perlvar{'lonHostID'})."/".$fname;
7966: $result="$fname\n";
7967: }
7968: } else {
7969: $result="not_found\n";
7970: }
7971: } else {
7972: $result="rejected\n";
7973: }
7974: return $result;
7975: }
7976: # Change the passwd of a unix user. The caller must have
7977: # first verified that the user is a loncapa user.
7978: #
7979: # Parameters:
7980: # user - Unix user name to change.
7981: # pass - New password for the user.
7982: # Returns:
7983: # ok - if success
7984: # other - Some meaningfule error message string.
7985: # NOTE:
7986: # invokes a setuid script to change the passwd.
7987: sub change_unix_password {
7988: my ($user, $pass) = @_;
7989:
7990: &Debug("change_unix_password");
7991: my $execdir=$perlvar{'lonDaemons'};
7992: &Debug("Opening lcpasswd pipeline");
7993: my $pf = IO::File->new("|$execdir/lcpasswd > "
7994: ."$perlvar{'lonDaemons'}"
7995: ."/logs/lcpasswd.log");
7996: print $pf "$user\n$pass\n$pass\n";
7997: close $pf;
7998: my $err = $?;
7999: return ($err < @passwderrors) ? $passwderrors[$err] :
8000: "pwchange_falure - unknown error";
8001:
8002:
8003: }
8004:
8005:
8006: sub make_passwd_file {
8007: my ($uname,$udom,$umode,$npass,$passfilename,$action)=@_;
8008: my $result="ok";
8009: if ($umode eq 'krb4' or $umode eq 'krb5') {
8010: {
8011: my $pf = IO::File->new(">$passfilename");
8012: if ($pf) {
8013: print $pf "$umode:$npass\n";
8014: &update_passwd_history($uname,$udom,$umode,$action);
8015: } else {
8016: $result = "pass_file_failed_error";
8017: }
8018: }
8019: } elsif ($umode eq 'internal') {
8020: my $ncpass = &hash_passwd($udom,$npass);
8021: {
8022: &Debug("Creating internal auth");
8023: my $pf = IO::File->new(">$passfilename");
8024: if($pf) {
8025: print $pf "internal:$ncpass\n";
8026: &update_passwd_history($uname,$udom,$umode,$action);
8027: } else {
8028: $result = "pass_file_failed_error";
8029: }
8030: }
8031: } elsif ($umode eq 'localauth') {
8032: {
8033: my $pf = IO::File->new(">$passfilename");
8034: if($pf) {
8035: print $pf "localauth:$npass\n";
8036: &update_passwd_history($uname,$udom,$umode,$action);
8037: } else {
8038: $result = "pass_file_failed_error";
8039: }
8040: }
8041: } elsif ($umode eq 'unix') {
8042: &logthis(">>>Attempt to create unix account blocked -- unix auth not available for new users.");
8043: $result="no_new_unix_accounts";
8044: } elsif ($umode eq 'none') {
8045: {
8046: my $pf = IO::File->new("> $passfilename");
8047: if($pf) {
8048: print $pf "none:\n";
8049: } else {
8050: $result = "pass_file_failed_error";
8051: }
8052: }
8053: } else {
8054: $result="auth_mode_error";
8055: }
8056: return $result;
8057: }
8058:
8059: sub convert_photo {
8060: my ($start,$dest)=@_;
8061: system("convert $start $dest");
8062: }
8063:
8064: sub sethost {
8065: my ($remotereq) = @_;
8066: my (undef,$hostid)=split(/:/,$remotereq);
8067: # ignore sethost if we are already correct
8068: if ($hostid eq $currenthostid) {
8069: return 'ok';
8070: }
8071:
8072: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
8073: if (&Apache::lonnet::get_host_ip($perlvar{'lonHostID'})
8074: eq &Apache::lonnet::get_host_ip($hostid)) {
8075: $currenthostid =$hostid;
8076: $currentdomainid=&Apache::lonnet::host_domain($hostid);
8077: # &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
8078: } else {
8079: &logthis("Requested host id $hostid not an alias of ".
8080: $perlvar{'lonHostID'}." refusing connection");
8081: return 'unable_to_set';
8082: }
8083: return 'ok';
8084: }
8085:
8086: sub version {
8087: my ($userinput)=@_;
8088: $remoteVERSION=(split(/:/,$userinput))[1];
8089: return "version:$VERSION";
8090: }
8091:
8092: sub get_usersession_config {
8093: my ($dom,$name) = @_;
8094: my ($usersessionconf,$cached)=&Apache::lonnet::is_cached_new($name,$dom);
8095: if (defined($cached)) {
8096: return $usersessionconf;
8097: } else {
8098: my %domconfig = &Apache::lonnet::get_dom('configuration',['usersessions'],$dom);
8099: &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'usersessions'},3600);
8100: return $domconfig{'usersessions'};
8101: }
8102: return;
8103: }
8104:
8105: sub get_prohibited {
8106: my ($dom) = @_;
8107: my $name = 'trust';
8108: my ($trustconfig,$cached)=&Apache::lonnet::is_cached_new($name,$dom);
8109: unless (defined($cached)) {
8110: my %domconfig = &Apache::lonnet::get_dom('configuration',['trust'],$dom);
8111: &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'trust'},3600);
8112: $trustconfig = $domconfig{'trust'};
8113: }
8114: my %prohibited;
8115: if (ref($trustconfig)) {
8116: foreach my $prefix (keys(%{$trustconfig})) {
8117: if (ref($trustconfig->{$prefix}) eq 'HASH') {
8118: my $reject;
8119: if (ref($trustconfig->{$prefix}->{'exc'}) eq 'ARRAY') {
8120: if (grep(/^\Q$clientintdom\E$/,@{$trustconfig->{$prefix}->{'exc'}})) {
8121: $reject = 1;
8122: }
8123: }
8124: if (ref($trustconfig->{$prefix}->{'inc'}) eq 'ARRAY') {
8125: if (grep(/^\Q$clientintdom\E$/,@{$trustconfig->{$prefix}->{'inc'}})) {
8126: $reject = 0;
8127: } else {
8128: $reject = 1;
8129: }
8130: }
8131: if ($reject) {
8132: $prohibited{$prefix} = 1;
8133: }
8134: }
8135: }
8136: }
8137: return %prohibited;
8138: }
8139:
8140: sub distro_and_arch {
8141: return $dist.':'.$arch;
8142: }
8143:
8144: # ----------------------------------- POD (plain old documentation, CPAN style)
8145:
8146: =head1 NAME
8147:
8148: lond - "LON Daemon" Server (port "LOND" 5663)
8149:
8150: =head1 SYNOPSIS
8151:
8152: Usage: B<lond>
8153:
8154: Should only be run as user=www. This is a command-line script which
8155: is invoked by B<loncron>. There is no expectation that a typical user
8156: will manually start B<lond> from the command-line. (In other words,
8157: DO NOT START B<lond> YOURSELF.)
8158:
8159: =head1 DESCRIPTION
8160:
8161: There are two characteristics associated with the running of B<lond>,
8162: PROCESS MANAGEMENT (starting, stopping, handling child processes)
8163: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
8164: subscriptions, etc). These are described in two large
8165: sections below.
8166:
8167: B<PROCESS MANAGEMENT>
8168:
8169: Preforker - server who forks first. Runs as a daemon. HUPs.
8170: Uses IDEA encryption
8171:
8172: B<lond> forks off children processes that correspond to the other servers
8173: in the network. Management of these processes can be done at the
8174: parent process level or the child process level.
8175:
8176: B<logs/lond.log> is the location of log messages.
8177:
8178: The process management is now explained in terms of linux shell commands,
8179: subroutines internal to this code, and signal assignments:
8180:
8181: =over 4
8182:
8183: =item *
8184:
8185: PID is stored in B<logs/lond.pid>
8186:
8187: This is the process id number of the parent B<lond> process.
8188:
8189: =item *
8190:
8191: SIGTERM and SIGINT
8192:
8193: Parent signal assignment:
8194: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
8195:
8196: Child signal assignment:
8197: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
8198: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
8199: to restart a new child.)
8200:
8201: Command-line invocations:
8202: B<kill> B<-s> SIGTERM I<PID>
8203: B<kill> B<-s> SIGINT I<PID>
8204:
8205: Subroutine B<HUNTSMAN>:
8206: This is only invoked for the B<lond> parent I<PID>.
8207: This kills all the children, and then the parent.
8208: The B<lonc.pid> file is cleared.
8209:
8210: =item *
8211:
8212: SIGHUP
8213:
8214: Current bug:
8215: This signal can only be processed the first time
8216: on the parent process. Subsequent SIGHUP signals
8217: have no effect.
8218:
8219: Parent signal assignment:
8220: $SIG{HUP} = \&HUPSMAN;
8221:
8222: Child signal assignment:
8223: none (nothing happens)
8224:
8225: Command-line invocations:
8226: B<kill> B<-s> SIGHUP I<PID>
8227:
8228: Subroutine B<HUPSMAN>:
8229: This is only invoked for the B<lond> parent I<PID>,
8230: This kills all the children, and then the parent.
8231: The B<lond.pid> file is cleared.
8232:
8233: =item *
8234:
8235: SIGUSR1
8236:
8237: Parent signal assignment:
8238: $SIG{USR1} = \&USRMAN;
8239:
8240: Child signal assignment:
8241: $SIG{USR1}= \&logstatus;
8242:
8243: Command-line invocations:
8244: B<kill> B<-s> SIGUSR1 I<PID>
8245:
8246: Subroutine B<USRMAN>:
8247: When invoked for the B<lond> parent I<PID>,
8248: SIGUSR1 is sent to all the children, and the status of
8249: each connection is logged.
8250:
8251: =item *
8252:
8253: SIGUSR2
8254:
8255: Parent Signal assignment:
8256: $SIG{USR2} = \&UpdateHosts
8257:
8258: Child signal assignment:
8259: NONE
8260:
8261:
8262: =item *
8263:
8264: SIGCHLD
8265:
8266: Parent signal assignment:
8267: $SIG{CHLD} = \&REAPER;
8268:
8269: Child signal assignment:
8270: none
8271:
8272: Command-line invocations:
8273: B<kill> B<-s> SIGCHLD I<PID>
8274:
8275: Subroutine B<REAPER>:
8276: This is only invoked for the B<lond> parent I<PID>.
8277: Information pertaining to the child is removed.
8278: The socket port is cleaned up.
8279:
8280: =back
8281:
8282: B<SERVER-SIDE ACTIVITIES>
8283:
8284: Server-side information can be accepted in an encrypted or non-encrypted
8285: method.
8286:
8287: =over 4
8288:
8289: =item ping
8290:
8291: Query a client in the hosts.tab table; "Are you there?"
8292:
8293: =item pong
8294:
8295: Respond to a ping query.
8296:
8297: =item ekey
8298:
8299: Read in encrypted key, make cipher. Respond with a buildkey.
8300:
8301: =item load
8302:
8303: Respond with CPU load based on a computation upon /proc/loadavg.
8304:
8305: =item currentauth
8306:
8307: Reply with current authentication information (only over an
8308: encrypted channel).
8309:
8310: =item auth
8311:
8312: Only over an encrypted channel, reply as to whether a user's
8313: authentication information can be validated.
8314:
8315: =item passwd
8316:
8317: Allow for a password to be set.
8318:
8319: =item makeuser
8320:
8321: Make a user.
8322:
8323: =item changeuserauth
8324:
8325: Allow for authentication mechanism and password to be changed.
8326:
8327: =item home
8328:
8329: Respond to a question "are you the home for a given user?"
8330:
8331: =item update
8332:
8333: Update contents of a subscribed resource.
8334:
8335: =item unsubscribe
8336:
8337: The server is unsubscribing from a resource.
8338:
8339: =item subscribe
8340:
8341: The server is subscribing to a resource.
8342:
8343: =item log
8344:
8345: Place in B<logs/lond.log>
8346:
8347: =item put
8348:
8349: stores hash in namespace
8350:
8351: =item rolesput
8352:
8353: put a role into a user's environment
8354:
8355: =item get
8356:
8357: returns hash with keys from array
8358: reference filled in from namespace
8359:
8360: =item eget
8361:
8362: returns hash with keys from array
8363: reference filled in from namesp (encrypts the return communication)
8364:
8365: =item rolesget
8366:
8367: get a role from a user's environment
8368:
8369: =item del
8370:
8371: deletes keys out of array from namespace
8372:
8373: =item keys
8374:
8375: returns namespace keys
8376:
8377: =item dump
8378:
8379: dumps the complete (or key matching regexp) namespace into a hash
8380:
8381: =item store
8382:
8383: stores hash permanently
8384: for this url; hashref needs to be given and should be a \%hashname; the
8385: remaining args aren't required and if they aren't passed or are '' they will
8386: be derived from the ENV
8387:
8388: =item restore
8389:
8390: returns a hash for a given url
8391:
8392: =item querysend
8393:
8394: Tells client about the lonsql process that has been launched in response
8395: to a sent query.
8396:
8397: =item queryreply
8398:
8399: Accept information from lonsql and make appropriate storage in temporary
8400: file space.
8401:
8402: =item idput
8403:
8404: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
8405: for each student, defined perhaps by the institutional Registrar.)
8406:
8407: =item idget
8408:
8409: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
8410: for each student, defined perhaps by the institutional Registrar.)
8411:
8412: =item iddel
8413:
8414: Deletes one or more ids in a domain's id database.
8415:
8416: =item tmpput
8417:
8418: Accept and store information in temporary space.
8419:
8420: =item tmpget
8421:
8422: Send along temporarily stored information.
8423:
8424: =item ls
8425:
8426: List part of a user's directory.
8427:
8428: =item pushtable
8429:
8430: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
8431: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
8432: must be restored manually in case of a problem with the new table file.
8433: pushtable requires that the request be encrypted and validated via
8434: ValidateManager. The form of the command is:
8435: enc:pushtable tablename <tablecontents> \n
8436: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
8437: cleartext newline.
8438:
8439: =item Hanging up (exit or init)
8440:
8441: What to do when a client tells the server that they (the client)
8442: are leaving the network.
8443:
8444: =item unknown command
8445:
8446: If B<lond> is sent an unknown command (not in the list above),
8447: it replys to the client "unknown_cmd".
8448:
8449:
8450: =item UNKNOWN CLIENT
8451:
8452: If the anti-spoofing algorithm cannot verify the client,
8453: the client is rejected (with a "refused" message sent
8454: to the client, and the connection is closed.
8455:
8456: =back
8457:
8458: =head1 PREREQUISITES
8459:
8460: IO::Socket
8461: IO::File
8462: Apache::File
8463: POSIX
8464: Crypt::IDEA
8465: LWP::UserAgent()
8466: GDBM_File
8467: Authen::Krb4
8468: Authen::Krb5
8469:
8470: =head1 COREQUISITES
8471:
8472: none
8473:
8474: =head1 OSNAMES
8475:
8476: linux
8477:
8478: =head1 SCRIPT CATEGORIES
8479:
8480: Server/Process
8481:
8482: =cut
8483:
8484:
8485: =pod
8486:
8487: =head1 LOG MESSAGES
8488:
8489: The messages below can be emitted in the lond log. This log is located
8490: in ~httpd/perl/logs/lond.log Many log messages have HTML encapsulation
8491: to provide coloring if examined from inside a web page. Some do not.
8492: Where color is used, the colors are; Red for sometihhng to get excited
8493: about and to follow up on. Yellow for something to keep an eye on to
8494: be sure it does not get worse, Green,and Blue for informational items.
8495:
8496: In the discussions below, sometimes reference is made to ~httpd
8497: when describing file locations. There isn't really an httpd
8498: user, however there is an httpd directory that gets installed in the
8499: place that user home directories go. On linux, this is usually
8500: (always?) /home/httpd.
8501:
8502:
8503: Some messages are colorless. These are usually (not always)
8504: Green/Blue color level messages.
8505:
8506: =over 2
8507:
8508: =item (Red) LocalConnection rejecting non local: <ip> ne 127.0.0.1
8509:
8510: A local connection negotiation was attempted by
8511: a host whose IP address was not 127.0.0.1.
8512: The socket is closed and the child will exit.
8513: lond has three ways to establish an encyrption
8514: key with a client:
8515:
8516: =over 2
8517:
8518: =item local
8519:
8520: The key is written and read from a file.
8521: This is only valid for connections from localhost.
8522:
8523: =item insecure
8524:
8525: The key is generated by the server and
8526: transmitted to the client.
8527:
8528: =item ssl (secure)
8529:
8530: An ssl connection is negotiated with the client,
8531: the key is generated by the server and sent to the
8532: client across this ssl connection before the
8533: ssl connectionis terminated and clear text
8534: transmission resumes.
8535:
8536: =back
8537:
8538: =item (Red) LocalConnection: caller is insane! init = <init> and type = <type>
8539:
8540: The client is local but has not sent an initialization
8541: string that is the literal "init:local" The connection
8542: is closed and the child exits.
8543:
8544: =item Red CRITICAL Can't get key file <error>
8545:
8546: SSL key negotiation is being attempted but the call to
8547: lonssl::KeyFile failed. This usually means that the
8548: configuration file is not correctly defining or protecting
8549: the directories/files lonCertificateDirectory or
8550: lonnetPrivateKey
8551: <error> is a string that describes the reason that
8552: the key file could not be located.
8553:
8554: =item (Red) CRITICAL Can't get certificates <error>
8555:
8556: SSL key negotiation failed because we were not able to retrives our certificate
8557: or the CA's certificate in the call to lonssl::CertificateFile
8558: <error> is the textual reason this failed. Usual reasons:
8559:
8560: =over 2
8561:
8562: =item Apache config file for loncapa incorrect:
8563:
8564: one of the variables
8565: lonCertificateDirectory, lonnetCertificateAuthority, or lonnetCertificate
8566: undefined or incorrect
8567:
8568: =item Permission error:
8569:
8570: The directory pointed to by lonCertificateDirectory is not readable by lond
8571:
8572: =item Permission error:
8573:
8574: Files in the directory pointed to by lonCertificateDirectory are not readable by lond.
8575:
8576: =item Installation error:
8577:
8578: Either the certificate authority file or the certificate have not
8579: been installed in lonCertificateDirectory.
8580:
8581: =item (Red) CRITICAL SSL Socket promotion failed: <err>
8582:
8583: The promotion of the connection from plaintext to SSL failed
8584: <err> is the reason for the failure. There are two
8585: system calls involved in the promotion (one of which failed),
8586: a dup to produce
8587: a second fd on the raw socket over which the encrypted data
8588: will flow and IO::SOcket::SSL->new_from_fd which creates
8589: the SSL connection on the duped fd.
8590:
8591: =item (Blue) WARNING client did not respond to challenge
8592:
8593: This occurs on an insecure (non SSL) connection negotiation request.
8594: lond generates some number from the time, the PID and sends it to
8595: the client. The client must respond by echoing this information back.
8596: If the client does not do so, that's a violation of the challenge
8597: protocols and the connection will be failed.
8598:
8599: =item (Red) No manager table. Nobody can manage!!
8600:
8601: lond has the concept of privileged hosts that
8602: can perform remote management function such
8603: as update the hosts.tab. The manager hosts
8604: are described in the
8605: ~httpd/lonTabs/managers.tab file.
8606: this message is logged if this file is missing.
8607:
8608:
8609: =item (Green) Registering manager <dnsname> as <cluster_name> with <ipaddress>
8610:
8611: Reports the successful parse and registration
8612: of a specific manager.
8613:
8614: =item Green existing host <clustername:dnsname>
8615:
8616: The manager host is already defined in the hosts.tab
8617: the information in that table, rather than the info in the
8618: manager table will be used to determine the manager's ip.
8619:
8620: =item (Red) Unable to craete <filename>
8621:
8622: lond has been asked to create new versions of an administrative
8623: file (by a manager). When this is done, the new file is created
8624: in a temp file and then renamed into place so that there are always
8625: usable administrative files, even if the update fails. This failure
8626: message means that the temp file could not be created.
8627: The update is abandoned, and the old file is available for use.
8628:
8629: =item (Green) CopyFile from <oldname> to <newname> failed
8630:
8631: In an update of administrative files, the copy of the existing file to a
8632: backup file failed. The installation of the new file may still succeed,
8633: but there will not be a back up file to rever to (this should probably
8634: be yellow).
8635:
8636: =item (Green) Pushfile: backed up <oldname> to <newname>
8637:
8638: See above, the backup of the old administrative file succeeded.
8639:
8640: =item (Red) Pushfile: Unable to install <filename> <reason>
8641:
8642: The new administrative file could not be installed. In this case,
8643: the old administrative file is still in use.
8644:
8645: =item (Green) Installed new < filename>.
8646:
8647: The new administrative file was successfullly installed.
8648:
8649: =item (Red) Reinitializing lond pid=<pid>
8650:
8651: The lonc child process <pid> will be sent a USR2
8652: signal.
8653:
8654: =item (Red) Reinitializing self
8655:
8656: We've been asked to re-read our administrative files,and
8657: are doing so.
8658:
8659: =item (Yellow) error:Invalid process identifier <ident>
8660:
8661: A reinit command was received, but the target part of the
8662: command was not valid. It must be either
8663: 'lond' or 'lonc' but was <ident>
8664:
8665: =item (Green) isValideditCommand checking: Command = <command> Key = <key> newline = <newline>
8666:
8667: Checking to see if lond has been handed a valid edit
8668: command. It is possible the edit command is not valid
8669: in that case there are no log messages to indicate that.
8670:
8671: =item Result of password change for <username> pwchange_success
8672:
8673: The password for <username> was
8674: successfully changed.
8675:
8676: =item Unable to open <user> passwd to change password
8677:
8678: Could not rewrite the
8679: internal password file for a user
8680:
8681: =item Result of password change for <user> : <result>
8682:
8683: A unix password change for <user> was attempted
8684: and the pipe returned <result>
8685:
8686: =item LWP GET: <message> for <fname> (<remoteurl>)
8687:
8688: The lightweight process fetch for a resource failed
8689: with <message> the local filename that should
8690: have existed/been created was <fname> the
8691: corresponding URI: <remoteurl> This is emitted in several
8692: places.
8693:
8694: =item Unable to move <transname> to <destname>
8695:
8696: From fetch_user_file_handler - the user file was replicated but could not
8697: be mv'd to its final location.
8698:
8699: =item Looking for <domain> <username>
8700:
8701: From user_has_session_handler - This should be a Debug call instead
8702: it indicates lond is about to check whether the specified user has a
8703: session active on the specified domain on the local host.
8704:
8705: =item Client <ip> (<name>) hanging up: <input>
8706:
8707: lond has been asked to exit by its client. The <ip> and <name> identify the
8708: client systemand <input> is the full exit command sent to the server.
8709:
8710: =item Red CRITICAL: ABNORMAL EXIT. child <pid> for server <hostname> died through a crass with this error->[<message>].
8711:
8712: A lond child terminated. NOte that this termination can also occur when the
8713: child receives the QUIT or DIE signals. <pid> is the process id of the child,
8714: <hostname> the host lond is working for, and <message> the reason the child died
8715: to the best of our ability to get it (I would guess that any numeric value
8716: represents and errno value). This is immediately followed by
8717:
8718: =item Famous last words: Catching exception - <log>
8719:
8720: Where log is some recent information about the state of the child.
8721:
8722: =item Red CRITICAL: TIME OUT <pid>
8723:
8724: Some timeout occured for server <pid>. THis is normally a timeout on an LWP
8725: doing an HTTP::GET.
8726:
8727: =item child <pid> died
8728:
8729: The reaper caught a SIGCHILD for the lond child process <pid>
8730: This should be modified to also display the IP of the dying child
8731: $children{$pid}
8732:
8733: =item Unknown child 0 died
8734: A child died but the wait for it returned a pid of zero which really should not
8735: ever happen.
8736:
8737: =item Child <which> - <pid> looks like we missed it's death
8738:
8739: When a sigchild is received, the reaper process checks all children to see if they are
8740: alive. If children are dying quite quickly, the lack of signal queuing can mean
8741: that a signal hearalds the death of more than one child. If so this message indicates
8742: which other one died. <which> is the ip of a dead child
8743:
8744: =item Free socket: <shutdownretval>
8745:
8746: The HUNTSMAN sub was called due to a SIGINT in a child process. The socket is being shutdown.
8747: for whatever reason, <shutdownretval> is printed but in fact shutdown() is not documented
8748: to return anything. This is followed by:
8749:
8750: =item Red CRITICAL: Shutting down
8751:
8752: Just prior to exit.
8753:
8754: =item Free socket: <shutdownretval>
8755:
8756: The HUPSMAN sub was called due to a SIGHUP. all children get killsed, and lond execs itself.
8757: This is followed by:
8758:
8759: =item (Red) CRITICAL: Restarting
8760:
8761: lond is about to exec itself to restart.
8762:
8763: =item (Blue) Updating connections
8764:
8765: (In response to a USR2). All the children (except the one for localhost)
8766: are about to be killed, the hosts tab reread, and Apache reloaded via apachereload.
8767:
8768: =item (Blue) UpdateHosts killing child <pid> for ip <ip>
8769:
8770: Due to USR2 as above.
8771:
8772: =item (Green) keeping child for ip <ip> (pid = <pid>)
8773:
8774: In response to USR2 as above, the child indicated is not being restarted because
8775: it's assumed that we'll always need a child for the localhost.
8776:
8777:
8778: =item Going to check on the children
8779:
8780: Parent is about to check on the health of the child processes.
8781: Note that this is in response to a USR1 sent to the parent lond.
8782: there may be one or more of the next two messages:
8783:
8784: =item <pid> is dead
8785:
8786: A child that we have in our child hash as alive has evidently died.
8787:
8788: =item Child <pid> did not respond
8789:
8790: In the health check the child <pid> did not update/produce a pid_.txt
8791: file when sent it's USR1 signal. That process is killed with a 9 signal, as it's
8792: assumed to be hung in some un-fixable way.
8793:
8794: =item Finished checking children
8795:
8796: Master processs's USR1 processing is cojmplete.
8797:
8798: =item (Red) CRITICAL: ------- Starting ------
8799:
8800: (There are more '-'s on either side). Lond has forked itself off to
8801: form a new session and is about to start actual initialization.
8802:
8803: =item (Green) Attempting to start child (<client>)
8804:
8805: Started a new child process for <client>. Client is IO::Socket object
8806: connected to the child. This was as a result of a TCP/IP connection from a client.
8807:
8808: =item Unable to determine who caller was, getpeername returned nothing
8809:
8810: In child process initialization. either getpeername returned undef or
8811: a zero sized object was returned. Processing continues, but in my opinion,
8812: this should be cause for the child to exit.
8813:
8814: =item Unable to determine clientip
8815:
8816: In child process initialization. The peer address from getpeername was not defined.
8817: The client address is stored as "Unavailable" and processing continues.
8818:
8819: =item (Yellow) INFO: Connection <ip> <name> connection type = <type>
8820:
8821: In child initialization. A good connectionw as received from <ip>.
8822:
8823: =over 2
8824:
8825: =item <name>
8826:
8827: is the name of the client from hosts.tab.
8828:
8829: =item <type>
8830:
8831: Is the connection type which is either
8832:
8833: =over 2
8834:
8835: =item manager
8836:
8837: The connection is from a manager node, not in hosts.tab
8838:
8839: =item client
8840:
8841: the connection is from a non-manager in the hosts.tab
8842:
8843: =item both
8844:
8845: The connection is from a manager in the hosts.tab.
8846:
8847: =back
8848:
8849: =back
8850:
8851: =item (Blue) Certificates not installed -- trying insecure auth
8852:
8853: One of the certificate file, key file or
8854: certificate authority file could not be found for a client attempting
8855: SSL connection intiation. COnnection will be attemptied in in-secure mode.
8856: (this would be a system with an up to date lond that has not gotten a
8857: certificate from us).
8858:
8859: =item (Green) Successful local authentication
8860:
8861: A local connection successfully negotiated the encryption key.
8862: In this case the IDEA key is in a file (that is hopefully well protected).
8863:
8864: =item (Green) Successful ssl authentication with <client>
8865:
8866: The client (<client> is the peer's name in hosts.tab), has successfully
8867: negotiated an SSL connection with this child process.
8868:
8869: =item (Green) Successful insecure authentication with <client>
8870:
8871:
8872: The client has successfully negotiated an insecure connection withthe child process.
8873:
8874: =item (Yellow) Attempted insecure connection disallowed
8875:
8876: The client attempted and failed to successfully negotiate a successful insecure
8877: connection. This can happen either because the variable londAllowInsecure is false
8878: or undefined, or becuse the child did not successfully echo back the challenge
8879: string.
8880:
8881:
8882: =back
8883:
8884: =back
8885:
8886:
8887: =cut
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