1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.530 2016/09/27 15:58:59 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: 1.530 $'; #' 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 $result;
1898: my %packagevars = (
1899: spareid => \%Apache::lonnet::spareid,
1900: perlvar => \%Apache::lonnet::perlvar,
1901: );
1902: my %limit_to = (
1903: perlvar => {
1904: lonOtherAuthen => 1,
1905: lonBalancer => 1,
1906: lonVersion => 1,
1907: lonSysEMail => 1,
1908: lonHostID => 1,
1909: lonRole => 1,
1910: lonDefDomain => 1,
1911: lonLoadLim => 1,
1912: lonUserLoadLim => 1,
1913: }
1914: );
1915: if (ref($requested) eq 'HASH') {
1916: foreach my $what (keys(%{$requested})) {
1917: my $response;
1918: my $items = {};
1919: if (exists($packagevars{$what})) {
1920: if (ref($limit_to{$what}) eq 'HASH') {
1921: foreach my $varname (keys(%{$packagevars{$what}})) {
1922: if ($limit_to{$what}{$varname}) {
1923: $items->{$varname} = $packagevars{$what}{$varname};
1924: }
1925: }
1926: } else {
1927: $items = $packagevars{$what};
1928: }
1929: if ($what eq 'perlvar') {
1930: if (!exists($packagevars{$what}{'lonBalancer'})) {
1931: if ($dist =~ /^(centos|rhes|fedora|scientific)/) {
1932: my $othervarref=LONCAPA::Configuration::read_conf('httpd.conf');
1933: if (ref($othervarref) eq 'HASH') {
1934: $items->{'lonBalancer'} = $othervarref->{'lonBalancer'};
1935: }
1936: }
1937: }
1938: }
1939: $response = &Apache::lonnet::freeze_escape($items);
1940: }
1941: $result .= &escape($what).'='.$response.'&';
1942: }
1943: }
1944: $result =~ s/\&$//;
1945: &Reply($client,\$result,$userinput);
1946: return 1;
1947: }
1948: ®ister_handler("readlonnetglobal", \&read_lonnet_global, 0, 1, 0);
1949:
1950: sub server_devalidatecache_handler {
1951: my ($cmd,$tail,$client) = @_;
1952: my $userinput = "$cmd:$tail";
1953: my $items = &unescape($tail);
1954: my @cached = split(/\&/,$items);
1955: foreach my $key (@cached) {
1956: if ($key =~ /:/) {
1957: my ($name,$id) = map { &unescape($_); } split(/:/,$key);
1958: &Apache::lonnet::devalidate_cache_new($name,$id);
1959: }
1960: }
1961: my $result = 'ok';
1962: &Reply($client,\$result,$userinput);
1963: return 1;
1964: }
1965: ®ister_handler("devalidatecache", \&server_devalidatecache_handler, 0, 1, 0);
1966:
1967: sub server_timezone_handler {
1968: my ($cmd,$tail,$client) = @_;
1969: my $userinput = "$cmd:$tail";
1970: my $timezone;
1971: my $clockfile = '/etc/sysconfig/clock'; # Fedora/CentOS/SuSE
1972: my $tzfile = '/etc/timezone'; # Debian/Ubuntu
1973: if (-e $clockfile) {
1974: if (open(my $fh,"<$clockfile")) {
1975: while (<$fh>) {
1976: next if (/^[\#\s]/);
1977: if (/^(?:TIME)?ZONE\s*=\s*['"]?\s*([\w\/]+)/) {
1978: $timezone = $1;
1979: last;
1980: }
1981: }
1982: close($fh);
1983: }
1984: } elsif (-e $tzfile) {
1985: if (open(my $fh,"<$tzfile")) {
1986: $timezone = <$fh>;
1987: close($fh);
1988: chomp($timezone);
1989: if ($timezone =~ m{^Etc/(\w+)$}) {
1990: $timezone = $1;
1991: }
1992: }
1993: }
1994: &Reply($client,\$timezone,$userinput); # This supports debug logging.
1995: return 1;
1996: }
1997: ®ister_handler("servertimezone", \&server_timezone_handler, 0, 1, 0);
1998:
1999: sub server_loncaparev_handler {
2000: my ($cmd,$tail,$client) = @_;
2001: my $userinput = "$cmd:$tail";
2002: &Reply($client,\$perlvar{'lonVersion'},$userinput);
2003: return 1;
2004: }
2005: ®ister_handler("serverloncaparev", \&server_loncaparev_handler, 0, 1, 0);
2006:
2007: sub server_homeID_handler {
2008: my ($cmd,$tail,$client) = @_;
2009: my $userinput = "$cmd:$tail";
2010: &Reply($client,\$perlvar{'lonHostID'},$userinput);
2011: return 1;
2012: }
2013: ®ister_handler("serverhomeID", \&server_homeID_handler, 0, 1, 0);
2014:
2015: sub server_distarch_handler {
2016: my ($cmd,$tail,$client) = @_;
2017: my $userinput = "$cmd:$tail";
2018: my $reply = &distro_and_arch();
2019: &Reply($client,\$reply,$userinput);
2020: return 1;
2021: }
2022: ®ister_handler("serverdistarch", \&server_distarch_handler, 0, 1, 0);
2023:
2024: sub server_certs_handler {
2025: my ($cmd,$tail,$client) = @_;
2026: my $userinput = "$cmd:$tail";
2027: my $result;
2028: my $result = &LONCAPA::Lond::server_certs(\%perlvar);
2029: &Reply($client,\$result,$userinput);
2030: return;
2031: }
2032: ®ister_handler("servercerts", \&server_certs_handler, 0, 1, 0);
2033:
2034: # Process a reinit request. Reinit requests that either
2035: # lonc or lond be reinitialized so that an updated
2036: # host.tab or domain.tab can be processed.
2037: #
2038: # Parameters:
2039: # $cmd - the actual keyword that invoked us.
2040: # $tail - the tail of the request that invoked us.
2041: # $client - File descriptor connected to the client
2042: # Returns:
2043: # 1 - Ok to continue processing.
2044: # 0 - Program should exit
2045: # Implicit output:
2046: # a reply is sent to the client.
2047: #
2048: sub reinit_process_handler {
2049: my ($cmd, $tail, $client) = @_;
2050:
2051: my $userinput = "$cmd:$tail";
2052:
2053: my $cert = &GetCertificate($userinput);
2054: if(&ValidManager($cert)) {
2055: chomp($userinput);
2056: my $reply = &ReinitProcess($userinput);
2057: &Reply( $client, \$reply, $userinput);
2058: } else {
2059: &Failure( $client, "refused\n", $userinput);
2060: }
2061: return 1;
2062: }
2063: ®ister_handler("reinit", \&reinit_process_handler, 1, 0, 1);
2064:
2065: # Process the editing script for a table edit operation.
2066: # the editing operation must be encrypted and requested by
2067: # a manager host.
2068: #
2069: # Parameters:
2070: # $cmd - the actual keyword that invoked us.
2071: # $tail - the tail of the request that invoked us.
2072: # $client - File descriptor connected to the client
2073: # Returns:
2074: # 1 - Ok to continue processing.
2075: # 0 - Program should exit
2076: # Implicit output:
2077: # a reply is sent to the client.
2078: #
2079: sub edit_table_handler {
2080: my ($command, $tail, $client) = @_;
2081:
2082: my $userinput = "$command:$tail";
2083:
2084: my $cert = &GetCertificate($userinput);
2085: if(&ValidManager($cert)) {
2086: my($filetype, $script) = split(/:/, $tail);
2087: if (($filetype eq "hosts") ||
2088: ($filetype eq "domain")) {
2089: if($script ne "") {
2090: &Reply($client, # BUGBUG - EditFile
2091: &EditFile($userinput), # could fail.
2092: $userinput);
2093: } else {
2094: &Failure($client,"refused\n",$userinput);
2095: }
2096: } else {
2097: &Failure($client,"refused\n",$userinput);
2098: }
2099: } else {
2100: &Failure($client,"refused\n",$userinput);
2101: }
2102: return 1;
2103: }
2104: ®ister_handler("edit", \&edit_table_handler, 1, 0, 1);
2105:
2106: #
2107: # Authenticate a user against the LonCAPA authentication
2108: # database. Note that there are several authentication
2109: # possibilities:
2110: # - unix - The user can be authenticated against the unix
2111: # password file.
2112: # - internal - The user can be authenticated against a purely
2113: # internal per user password file.
2114: # - kerberos - The user can be authenticated against either a kerb4 or kerb5
2115: # ticket granting authority.
2116: # - user - The person tailoring LonCAPA can supply a user authentication
2117: # mechanism that is per system.
2118: #
2119: # Parameters:
2120: # $cmd - The command that got us here.
2121: # $tail - Tail of the command (remaining parameters).
2122: # $client - File descriptor connected to client.
2123: # Returns
2124: # 0 - Requested to exit, caller should shut down.
2125: # 1 - Continue processing.
2126: # Implicit inputs:
2127: # The authentication systems describe above have their own forms of implicit
2128: # input into the authentication process that are described above.
2129: #
2130: sub authenticate_handler {
2131: my ($cmd, $tail, $client) = @_;
2132:
2133:
2134: # Regenerate the full input line
2135:
2136: my $userinput = $cmd.":".$tail;
2137:
2138: # udom - User's domain.
2139: # uname - Username.
2140: # upass - User's password.
2141: # checkdefauth - Pass to validate_user() to try authentication
2142: # with default auth type(s) if no user account.
2143: # clientcancheckhost - Passed by clients with functionality in lonauth.pm
2144: # to check if session can be hosted.
2145:
2146: my ($udom, $uname, $upass, $checkdefauth, $clientcancheckhost)=split(/:/,$tail);
2147: &Debug(" Authenticate domain = $udom, user = $uname, password = $upass, checkdefauth = $checkdefauth");
2148: chomp($upass);
2149: $upass=&unescape($upass);
2150:
2151: my $pwdcorrect = &validate_user($udom,$uname,$upass,$checkdefauth);
2152: if($pwdcorrect) {
2153: my $canhost = 1;
2154: unless ($clientcancheckhost) {
2155: my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
2156: my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
2157: my @intdoms;
2158: my $internet_names = &Apache::lonnet::get_internet_names($clientname);
2159: if (ref($internet_names) eq 'ARRAY') {
2160: @intdoms = @{$internet_names};
2161: }
2162: unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
2163: my ($remote,$hosted);
2164: my $remotesession = &get_usersession_config($udom,'remotesession');
2165: if (ref($remotesession) eq 'HASH') {
2166: $remote = $remotesession->{'remote'};
2167: }
2168: my $hostedsession = &get_usersession_config($clienthomedom,'hostedsession');
2169: if (ref($hostedsession) eq 'HASH') {
2170: $hosted = $hostedsession->{'hosted'};
2171: }
2172: $canhost = &Apache::lonnet::can_host_session($udom,$clientname,
2173: $clientversion,
2174: $remote,$hosted);
2175: }
2176: }
2177: if ($canhost) {
2178: &Reply( $client, "authorized\n", $userinput);
2179: } else {
2180: &Reply( $client, "not_allowed_to_host\n", $userinput);
2181: }
2182: #
2183: # Bad credentials: Failed to authorize
2184: #
2185: } else {
2186: &Failure( $client, "non_authorized\n", $userinput);
2187: }
2188:
2189: return 1;
2190: }
2191: ®ister_handler("auth", \&authenticate_handler, 1, 1, 0);
2192:
2193: #
2194: # Change a user's password. Note that this function is complicated by
2195: # the fact that a user may be authenticated in more than one way:
2196: # At present, we are not able to change the password for all types of
2197: # authentication methods. Only for:
2198: # unix - unix password or shadow passoword style authentication.
2199: # local - Locally written authentication mechanism.
2200: # For now, kerb4 and kerb5 password changes are not supported and result
2201: # in an error.
2202: # FUTURE WORK:
2203: # Support kerberos passwd changes?
2204: # Parameters:
2205: # $cmd - The command that got us here.
2206: # $tail - Tail of the command (remaining parameters).
2207: # $client - File descriptor connected to client.
2208: # Returns
2209: # 0 - Requested to exit, caller should shut down.
2210: # 1 - Continue processing.
2211: # Implicit inputs:
2212: # The authentication systems describe above have their own forms of implicit
2213: # input into the authentication process that are described above.
2214: sub change_password_handler {
2215: my ($cmd, $tail, $client) = @_;
2216:
2217: my $userinput = $cmd.":".$tail; # Reconstruct client's string.
2218:
2219: #
2220: # udom - user's domain.
2221: # uname - Username.
2222: # upass - Current password.
2223: # npass - New password.
2224: # context - Context in which this was called
2225: # (preferences or reset_by_email).
2226: # lonhost - HostID of server where request originated
2227:
2228: my ($udom,$uname,$upass,$npass,$context,$lonhost)=split(/:/,$tail);
2229:
2230: $upass=&unescape($upass);
2231: $npass=&unescape($npass);
2232: &Debug("Trying to change password for $uname");
2233:
2234: # First require that the user can be authenticated with their
2235: # old password unless context was 'reset_by_email':
2236:
2237: my ($validated,$failure);
2238: if ($context eq 'reset_by_email') {
2239: if ($lonhost eq '') {
2240: $failure = 'invalid_client';
2241: } else {
2242: $validated = 1;
2243: }
2244: } else {
2245: $validated = &validate_user($udom, $uname, $upass);
2246: }
2247: if($validated) {
2248: my $realpasswd = &get_auth_type($udom, $uname); # Defined since authd.
2249:
2250: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
2251: if ($howpwd eq 'internal') {
2252: &Debug("internal auth");
2253: my $ncpass = &hash_passwd($udom,$npass);
2254: if(&rewrite_password_file($udom, $uname, "internal:$ncpass")) {
2255: my $msg="Result of password change for $uname: pwchange_success";
2256: if ($lonhost) {
2257: $msg .= " - request originated from: $lonhost";
2258: }
2259: &logthis($msg);
2260: &update_passwd_history($uname,$udom,$howpwd,$context);
2261: &Reply($client, "ok\n", $userinput);
2262: } else {
2263: &logthis("Unable to open $uname passwd "
2264: ."to change password");
2265: &Failure( $client, "non_authorized\n",$userinput);
2266: }
2267: } elsif ($howpwd eq 'unix' && $context ne 'reset_by_email') {
2268: my $result = &change_unix_password($uname, $npass);
2269: if ($result eq 'ok') {
2270: &update_passwd_history($uname,$udom,$howpwd,$context);
2271: }
2272: &logthis("Result of password change for $uname: ".
2273: $result);
2274: &Reply($client, \$result, $userinput);
2275: } else {
2276: # this just means that the current password mode is not
2277: # one we know how to change (e.g the kerberos auth modes or
2278: # locally written auth handler).
2279: #
2280: &Failure( $client, "auth_mode_error\n", $userinput);
2281: }
2282:
2283: } else {
2284: if ($failure eq '') {
2285: $failure = 'non_authorized';
2286: }
2287: &Failure( $client, "$failure\n", $userinput);
2288: }
2289:
2290: return 1;
2291: }
2292: ®ister_handler("passwd", \&change_password_handler, 1, 1, 0);
2293:
2294: sub hash_passwd {
2295: my ($domain,$plainpass,@rest) = @_;
2296: my ($salt,$cost);
2297: if (@rest) {
2298: $cost = $rest[0];
2299: # salt is first 22 characters, base-64 encoded by bcrypt
2300: my $plainsalt = substr($rest[1],0,22);
2301: $salt = Crypt::Eksblowfish::Bcrypt::de_base64($plainsalt);
2302: } else {
2303: my $defaultcost;
2304: my %domconfig =
2305: &Apache::lonnet::get_dom('configuration',['password'],$domain);
2306: if (ref($domconfig{'password'}) eq 'HASH') {
2307: $defaultcost = $domconfig{'password'}{'cost'};
2308: }
2309: if (($defaultcost eq '') || ($defaultcost =~ /D/)) {
2310: $cost = 10;
2311: } else {
2312: $cost = $defaultcost;
2313: }
2314: # Generate random 16-octet base64 salt
2315: $salt = "";
2316: $salt .= pack("C", int rand(256)) for 1..16;
2317: }
2318: my $hash = &Crypt::Eksblowfish::Bcrypt::bcrypt_hash({
2319: key_nul => 1,
2320: cost => $cost,
2321: salt => $salt,
2322: }, Digest::SHA::sha512(Encode::encode('UTF-8',$plainpass)));
2323:
2324: my $result = join("!", "", "bcrypt", sprintf("%02d",$cost),
2325: &Crypt::Eksblowfish::Bcrypt::en_base64($salt).
2326: &Crypt::Eksblowfish::Bcrypt::en_base64($hash));
2327: return $result;
2328: }
2329:
2330: #
2331: # Create a new user. User in this case means a lon-capa user.
2332: # The user must either already exist in some authentication realm
2333: # like kerberos or the /etc/passwd. If not, a user completely local to
2334: # this loncapa system is created.
2335: #
2336: # Parameters:
2337: # $cmd - The command that got us here.
2338: # $tail - Tail of the command (remaining parameters).
2339: # $client - File descriptor connected to client.
2340: # Returns
2341: # 0 - Requested to exit, caller should shut down.
2342: # 1 - Continue processing.
2343: # Implicit inputs:
2344: # The authentication systems describe above have their own forms of implicit
2345: # input into the authentication process that are described above.
2346: sub add_user_handler {
2347:
2348: my ($cmd, $tail, $client) = @_;
2349:
2350:
2351: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
2352: my $userinput = $cmd.":".$tail; # Reconstruct the full request line.
2353:
2354: &Debug("cmd =".$cmd." $udom =".$udom." uname=".$uname);
2355:
2356:
2357: if($udom eq $currentdomainid) { # Reject new users for other domains...
2358:
2359: my $oldumask=umask(0077);
2360: chomp($npass);
2361: $npass=&unescape($npass);
2362: my $passfilename = &password_path($udom, $uname);
2363: &Debug("Password file created will be:".$passfilename);
2364: if (-e $passfilename) {
2365: &Failure( $client, "already_exists\n", $userinput);
2366: } else {
2367: my $fperror='';
2368: if (!&mkpath($passfilename)) {
2369: $fperror="error: ".($!+0)." mkdir failed while attempting "
2370: ."makeuser";
2371: }
2372: unless ($fperror) {
2373: my $result=&make_passwd_file($uname,$udom,$umode,$npass,
2374: $passfilename,'makeuser');
2375: &Reply($client,\$result, $userinput); #BUGBUG - could be fail
2376: } else {
2377: &Failure($client, \$fperror, $userinput);
2378: }
2379: }
2380: umask($oldumask);
2381: } else {
2382: &Failure($client, "not_right_domain\n",
2383: $userinput); # Even if we are multihomed.
2384:
2385: }
2386: return 1;
2387:
2388: }
2389: ®ister_handler("makeuser", \&add_user_handler, 1, 1, 0);
2390:
2391: #
2392: # Change the authentication method of a user. Note that this may
2393: # also implicitly change the user's password if, for example, the user is
2394: # joining an existing authentication realm. Known authentication realms at
2395: # this time are:
2396: # internal - Purely internal password file (only loncapa knows this user)
2397: # local - Institutionally written authentication module.
2398: # unix - Unix user (/etc/passwd with or without /etc/shadow).
2399: # kerb4 - kerberos version 4
2400: # kerb5 - kerberos version 5
2401: #
2402: # Parameters:
2403: # $cmd - The command that got us here.
2404: # $tail - Tail of the command (remaining parameters).
2405: # $client - File descriptor connected to client.
2406: # Returns
2407: # 0 - Requested to exit, caller should shut down.
2408: # 1 - Continue processing.
2409: # Implicit inputs:
2410: # The authentication systems describe above have their own forms of implicit
2411: # input into the authentication process that are described above.
2412: # NOTE:
2413: # This is also used to change the authentication credential values (e.g. passwd).
2414: #
2415: #
2416: sub change_authentication_handler {
2417:
2418: my ($cmd, $tail, $client) = @_;
2419:
2420: my $userinput = "$cmd:$tail"; # Reconstruct user input.
2421:
2422: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
2423: &Debug("cmd = ".$cmd." domain= ".$udom."uname =".$uname." umode= ".$umode);
2424: if ($udom ne $currentdomainid) {
2425: &Failure( $client, "not_right_domain\n", $client);
2426: } else {
2427:
2428: chomp($npass);
2429:
2430: $npass=&unescape($npass);
2431: my $oldauth = &get_auth_type($udom, $uname); # Get old auth info.
2432: my $passfilename = &password_path($udom, $uname);
2433: if ($passfilename) { # Not allowed to create a new user!!
2434: # If just changing the unix passwd. need to arrange to run
2435: # passwd since otherwise make_passwd_file will fail as
2436: # creation of unix authenticated users is no longer supported
2437: # except from the command line, when running make_domain_coordinator.pl
2438:
2439: if(($oldauth =~/^unix/) && ($umode eq "unix")) {
2440: my $result = &change_unix_password($uname, $npass);
2441: &logthis("Result of password change for $uname: ".$result);
2442: if ($result eq "ok") {
2443: &update_passwd_history($uname,$udom,$umode,'changeuserauth');
2444: &Reply($client, \$result);
2445: } else {
2446: &Failure($client, \$result);
2447: }
2448: } else {
2449: my $result=&make_passwd_file($uname,$udom,$umode,$npass,
2450: $passfilename,'changeuserauth');
2451: #
2452: # If the current auth mode is internal, and the old auth mode was
2453: # unix, or krb*, and the user is an author for this domain,
2454: # re-run manage_permissions for that role in order to be able
2455: # to take ownership of the construction space back to www:www
2456: #
2457:
2458:
2459: &Reply($client, \$result, $userinput);
2460: }
2461:
2462:
2463: } else {
2464: &Failure($client, "non_authorized\n", $userinput); # Fail the user now.
2465: }
2466: }
2467: return 1;
2468: }
2469: ®ister_handler("changeuserauth", \&change_authentication_handler, 1,1, 0);
2470:
2471: sub update_passwd_history {
2472: my ($uname,$udom,$umode,$context) = @_;
2473: my $proname=&propath($udom,$uname);
2474: my $now = time;
2475: if (open(my $fh,">>$proname/passwd.log")) {
2476: print $fh "$now:$umode:$context\n";
2477: close($fh);
2478: }
2479: return;
2480: }
2481:
2482: #
2483: # Determines if this is the home server for a user. The home server
2484: # for a user will have his/her lon-capa passwd file. Therefore all we need
2485: # to do is determine if this file exists.
2486: #
2487: # Parameters:
2488: # $cmd - The command that got us here.
2489: # $tail - Tail of the command (remaining parameters).
2490: # $client - File descriptor connected to client.
2491: # Returns
2492: # 0 - Requested to exit, caller should shut down.
2493: # 1 - Continue processing.
2494: # Implicit inputs:
2495: # The authentication systems describe above have their own forms of implicit
2496: # input into the authentication process that are described above.
2497: #
2498: sub is_home_handler {
2499: my ($cmd, $tail, $client) = @_;
2500:
2501: my $userinput = "$cmd:$tail";
2502:
2503: my ($udom,$uname)=split(/:/,$tail);
2504: chomp($uname);
2505: my $passfile = &password_filename($udom, $uname);
2506: if($passfile) {
2507: &Reply( $client, "found\n", $userinput);
2508: } else {
2509: &Failure($client, "not_found\n", $userinput);
2510: }
2511: return 1;
2512: }
2513: ®ister_handler("home", \&is_home_handler, 0,1,0);
2514:
2515: #
2516: # Process an update request for a resource.
2517: # A resource has been modified that we hold a subscription to.
2518: # If the resource is not local, then we must update, or at least invalidate our
2519: # cached copy of the resource.
2520: # Parameters:
2521: # $cmd - The command that got us here.
2522: # $tail - Tail of the command (remaining parameters).
2523: # $client - File descriptor connected to client.
2524: # Returns
2525: # 0 - Requested to exit, caller should shut down.
2526: # 1 - Continue processing.
2527: # Implicit inputs:
2528: # The authentication systems describe above have their own forms of implicit
2529: # input into the authentication process that are described above.
2530: #
2531: sub update_resource_handler {
2532:
2533: my ($cmd, $tail, $client) = @_;
2534:
2535: my $userinput = "$cmd:$tail";
2536:
2537: my $fname= $tail; # This allows interactive testing
2538:
2539:
2540: my $ownership=ishome($fname);
2541: if ($ownership eq 'not_owner') {
2542: if (-e $fname) {
2543: # Delete preview file, if exists
2544: unlink("$fname.tmp");
2545: # Get usage stats
2546: my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
2547: $atime,$mtime,$ctime,$blksize,$blocks)=stat($fname);
2548: my $now=time;
2549: my $since=$now-$atime;
2550: # If the file has not been used within lonExpire seconds,
2551: # unsubscribe from it and delete local copy
2552: if ($since>$perlvar{'lonExpire'}) {
2553: my $reply=&Apache::lonnet::reply("unsub:$fname","$clientname");
2554: &devalidate_meta_cache($fname);
2555: unlink("$fname");
2556: unlink("$fname.meta");
2557: } else {
2558: # Yes, this is in active use. Get a fresh copy. Since it might be in
2559: # very active use and huge (like a movie), copy it to "in.transfer" filename first.
2560: my $transname="$fname.in.transfer";
2561: my $remoteurl=&Apache::lonnet::reply("sub:$fname","$clientname");
2562: my $response;
2563: # FIXME: cannot replicate files that take more than two minutes to transfer?
2564: # alarm(120);
2565: # FIXME: this should use the LWP mechanism, not internal alarms.
2566: alarm(1200);
2567: {
2568: my $request=new HTTP::Request('GET',"$remoteurl");
2569: $response=&LONCAPA::LWPReq::makerequest($clientname,$request,$transname,\%perlvar,1200,0,1);
2570: }
2571: alarm(0);
2572: if ($response->is_error()) {
2573: # FIXME: we should probably clean up here instead of just whine
2574: unlink($transname);
2575: my $message=$response->status_line;
2576: &logthis("LWP GET: $message for $fname ($remoteurl)");
2577: } else {
2578: if ($remoteurl!~/\.meta$/) {
2579: # FIXME: isn't there an internal LWP mechanism for this?
2580: alarm(120);
2581: {
2582: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
2583: my $mresponse = &LONCAPA::LWPReq::makerequest($clientname,$mrequest,$fname.'.meta',\%perlvar,120,0,1);
2584: if ($mresponse->is_error()) {
2585: unlink($fname.'.meta');
2586: }
2587: }
2588: alarm(0);
2589: }
2590: # we successfully transfered, copy file over to real name
2591: rename($transname,$fname);
2592: &devalidate_meta_cache($fname);
2593: }
2594: }
2595: &Reply( $client, "ok\n", $userinput);
2596: } else {
2597: &Failure($client, "not_found\n", $userinput);
2598: }
2599: } else {
2600: &Failure($client, "rejected\n", $userinput);
2601: }
2602: return 1;
2603: }
2604: ®ister_handler("update", \&update_resource_handler, 0 ,1, 0);
2605:
2606: sub devalidate_meta_cache {
2607: my ($url) = @_;
2608: use Cache::Memcached;
2609: my $memcache = new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
2610: $url = &Apache::lonnet::declutter($url);
2611: $url =~ s-\.meta$--;
2612: my $id = &escape('meta:'.$url);
2613: $memcache->delete($id);
2614: }
2615:
2616: #
2617: # Fetch a user file from a remote server to the user's home directory
2618: # userfiles subdir.
2619: # Parameters:
2620: # $cmd - The command that got us here.
2621: # $tail - Tail of the command (remaining parameters).
2622: # $client - File descriptor connected to client.
2623: # Returns
2624: # 0 - Requested to exit, caller should shut down.
2625: # 1 - Continue processing.
2626: #
2627: sub fetch_user_file_handler {
2628:
2629: my ($cmd, $tail, $client) = @_;
2630:
2631: my $userinput = "$cmd:$tail";
2632: my $fname = $tail;
2633: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
2634: my $udir=&propath($udom,$uname).'/userfiles';
2635: unless (-e $udir) {
2636: mkdir($udir,0770);
2637: }
2638: Debug("fetch user file for $fname");
2639: if (-e $udir) {
2640: $ufile=~s/^[\.\~]+//;
2641:
2642: # IF necessary, create the path right down to the file.
2643: # Note that any regular files in the way of this path are
2644: # wiped out to deal with some earlier folly of mine.
2645:
2646: if (!&mkpath($udir.'/'.$ufile)) {
2647: &Failure($client, "unable_to_create\n", $userinput);
2648: }
2649:
2650: my $destname=$udir.'/'.$ufile;
2651: my $transname=$udir.'/'.$ufile.'.in.transit';
2652: my $clientprotocol=$Apache::lonnet::protocol{$clientname};
2653: $clientprotocol = 'http' if ($clientprotocol ne 'https');
2654: my $clienthost = &Apache::lonnet::hostname($clientname);
2655: my $remoteurl=$clientprotocol.'://'.$clienthost.'/userfiles/'.$fname;
2656: my $response;
2657: Debug("Remote URL : $remoteurl Transfername $transname Destname: $destname");
2658: alarm(1200);
2659: {
2660: my $request=new HTTP::Request('GET',"$remoteurl");
2661: my $verifycert = 1;
2662: my @machine_ids = &Apache::lonnet::current_machine_ids();
2663: if (grep(/^\Q$clientname\E$/,@machine_ids)) {
2664: $verifycert = 0;
2665: }
2666: $response = &LONCAPA::LWPReq::makerequest($clientname,$request,$transname,\%perlvar,1200,$verifycert);
2667: }
2668: alarm(0);
2669: if ($response->is_error()) {
2670: unlink($transname);
2671: my $message=$response->status_line;
2672: &logthis("LWP GET: $message for $fname ($remoteurl)");
2673: &Failure($client, "failed\n", $userinput);
2674: } else {
2675: Debug("Renaming $transname to $destname");
2676: if (!rename($transname,$destname)) {
2677: &logthis("Unable to move $transname to $destname");
2678: unlink($transname);
2679: &Failure($client, "failed\n", $userinput);
2680: } else {
2681: if ($fname =~ /^default.+\.(page|sequence)$/) {
2682: my ($major,$minor) = split(/\./,$clientversion);
2683: if (($major < 2) || ($major == 2 && $minor < 11)) {
2684: my $now = time;
2685: &Apache::lonnet::do_cache_new('crschange',$udom.'_'.$uname,$now,600);
2686: my $key = &escape('internal.contentchange');
2687: my $what = "$key=$now";
2688: my $hashref = &tie_user_hash($udom,$uname,'environment',
2689: &GDBM_WRCREAT(),"P",$what);
2690: if ($hashref) {
2691: $hashref->{$key}=$now;
2692: if (!&untie_user_hash($hashref)) {
2693: &logthis("error: ".($!+0)." untie (GDBM) failed ".
2694: "when updating internal.contentchange");
2695: }
2696: }
2697: }
2698: }
2699: &Reply($client, "ok\n", $userinput);
2700: }
2701: }
2702: } else {
2703: &Failure($client, "not_home\n", $userinput);
2704: }
2705: return 1;
2706: }
2707: ®ister_handler("fetchuserfile", \&fetch_user_file_handler, 0, 1, 0);
2708:
2709: #
2710: # Remove a file from a user's home directory userfiles subdirectory.
2711: # Parameters:
2712: # cmd - the Lond request keyword that got us here.
2713: # tail - the part of the command past the keyword.
2714: # client- File descriptor connected with the client.
2715: #
2716: # Returns:
2717: # 1 - Continue processing.
2718: sub remove_user_file_handler {
2719: my ($cmd, $tail, $client) = @_;
2720:
2721: my ($fname) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2722:
2723: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
2724: if ($ufile =~m|/\.\./|) {
2725: # any files paths with /../ in them refuse
2726: # to deal with
2727: &Failure($client, "refused\n", "$cmd:$tail");
2728: } else {
2729: my $udir = &propath($udom,$uname);
2730: if (-e $udir) {
2731: my $file=$udir.'/userfiles/'.$ufile;
2732: if (-e $file) {
2733: #
2734: # If the file is a regular file unlink is fine...
2735: # However it's possible the client wants a dir
2736: # removed, in which case rmdir is more appropriate.
2737: # Note: rmdir will only remove an empty directory.
2738: #
2739: if (-f $file){
2740: unlink($file);
2741: # for html files remove the associated .bak file
2742: # which may have been created by the editor.
2743: if ($ufile =~ m{^((docs|supplemental)/(?:\d+|default)/\d+(?:|/.+)/)[^/]+\.x?html?$}i) {
2744: my $path = $1;
2745: if (-e $file.'.bak') {
2746: unlink($file.'.bak');
2747: }
2748: }
2749: } elsif(-d $file) {
2750: rmdir($file);
2751: }
2752: if (-e $file) {
2753: # File is still there after we deleted it ?!?
2754:
2755: &Failure($client, "failed\n", "$cmd:$tail");
2756: } else {
2757: &Reply($client, "ok\n", "$cmd:$tail");
2758: }
2759: } else {
2760: &Failure($client, "not_found\n", "$cmd:$tail");
2761: }
2762: } else {
2763: &Failure($client, "not_home\n", "$cmd:$tail");
2764: }
2765: }
2766: return 1;
2767: }
2768: ®ister_handler("removeuserfile", \&remove_user_file_handler, 0,1,0);
2769:
2770: #
2771: # make a directory in a user's home directory userfiles subdirectory.
2772: # Parameters:
2773: # cmd - the Lond request keyword that got us here.
2774: # tail - the part of the command past the keyword.
2775: # client- File descriptor connected with the client.
2776: #
2777: # Returns:
2778: # 1 - Continue processing.
2779: sub mkdir_user_file_handler {
2780: my ($cmd, $tail, $client) = @_;
2781:
2782: my ($dir) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2783: $dir=&unescape($dir);
2784: my ($udom,$uname,$ufile) = ($dir =~ m|^([^/]+)/([^/]+)/(.+)$|);
2785: if ($ufile =~m|/\.\./|) {
2786: # any files paths with /../ in them refuse
2787: # to deal with
2788: &Failure($client, "refused\n", "$cmd:$tail");
2789: } else {
2790: my $udir = &propath($udom,$uname);
2791: if (-e $udir) {
2792: my $newdir=$udir.'/userfiles/'.$ufile.'/';
2793: if (!&mkpath($newdir)) {
2794: &Failure($client, "failed\n", "$cmd:$tail");
2795: }
2796: &Reply($client, "ok\n", "$cmd:$tail");
2797: } else {
2798: &Failure($client, "not_home\n", "$cmd:$tail");
2799: }
2800: }
2801: return 1;
2802: }
2803: ®ister_handler("mkdiruserfile", \&mkdir_user_file_handler, 0,1,0);
2804:
2805: #
2806: # rename a file in a user's home directory userfiles subdirectory.
2807: # Parameters:
2808: # cmd - the Lond request keyword that got us here.
2809: # tail - the part of the command past the keyword.
2810: # client- File descriptor connected with the client.
2811: #
2812: # Returns:
2813: # 1 - Continue processing.
2814: sub rename_user_file_handler {
2815: my ($cmd, $tail, $client) = @_;
2816:
2817: my ($udom,$uname,$old,$new) = split(/:/, $tail);
2818: $old=&unescape($old);
2819: $new=&unescape($new);
2820: if ($new =~m|/\.\./| || $old =~m|/\.\./|) {
2821: # any files paths with /../ in them refuse to deal with
2822: &Failure($client, "refused\n", "$cmd:$tail");
2823: } else {
2824: my $udir = &propath($udom,$uname);
2825: if (-e $udir) {
2826: my $oldfile=$udir.'/userfiles/'.$old;
2827: my $newfile=$udir.'/userfiles/'.$new;
2828: if (-e $newfile) {
2829: &Failure($client, "exists\n", "$cmd:$tail");
2830: } elsif (! -e $oldfile) {
2831: &Failure($client, "not_found\n", "$cmd:$tail");
2832: } else {
2833: if (!rename($oldfile,$newfile)) {
2834: &Failure($client, "failed\n", "$cmd:$tail");
2835: } else {
2836: &Reply($client, "ok\n", "$cmd:$tail");
2837: }
2838: }
2839: } else {
2840: &Failure($client, "not_home\n", "$cmd:$tail");
2841: }
2842: }
2843: return 1;
2844: }
2845: ®ister_handler("renameuserfile", \&rename_user_file_handler, 0,1,0);
2846:
2847: #
2848: # Checks if the specified user has an active session on the server
2849: # return ok if so, not_found if not
2850: #
2851: # Parameters:
2852: # cmd - The request keyword that dispatched to tus.
2853: # tail - The tail of the request (colon separated parameters).
2854: # client - Filehandle open on the client.
2855: # Return:
2856: # 1.
2857: sub user_has_session_handler {
2858: my ($cmd, $tail, $client) = @_;
2859:
2860: my ($udom, $uname) = map { &unescape($_) } (split(/:/, $tail));
2861:
2862: opendir(DIR,$perlvar{'lonIDsDir'});
2863: my $filename;
2864: while ($filename=readdir(DIR)) {
2865: last if ($filename=~/^\Q$uname\E_\d+_\Q$udom\E_/);
2866: }
2867: if ($filename) {
2868: &Reply($client, "ok\n", "$cmd:$tail");
2869: } else {
2870: &Failure($client, "not_found\n", "$cmd:$tail");
2871: }
2872: return 1;
2873:
2874: }
2875: ®ister_handler("userhassession", \&user_has_session_handler, 0,1,0);
2876:
2877: #
2878: # Authenticate access to a user file by checking that the token the user's
2879: # passed also exists in their session file
2880: #
2881: # Parameters:
2882: # cmd - The request keyword that dispatched to tus.
2883: # tail - The tail of the request (colon separated parameters).
2884: # client - Filehandle open on the client.
2885: # Return:
2886: # 1.
2887: sub token_auth_user_file_handler {
2888: my ($cmd, $tail, $client) = @_;
2889:
2890: my ($fname, $session) = split(/:/, $tail);
2891:
2892: chomp($session);
2893: my $reply="non_auth";
2894: my $file = $perlvar{'lonIDsDir'}.'/'.$session.'.id';
2895: if (open(ENVIN,"$file")) {
2896: flock(ENVIN,LOCK_SH);
2897: tie(my %disk_env,'GDBM_File',"$file",&GDBM_READER(),0640);
2898: if (exists($disk_env{"userfile.$fname"})) {
2899: $reply="ok";
2900: } else {
2901: foreach my $envname (keys(%disk_env)) {
2902: if ($envname=~ m|^userfile\.\Q$fname\E|) {
2903: $reply="ok";
2904: last;
2905: }
2906: }
2907: }
2908: untie(%disk_env);
2909: close(ENVIN);
2910: &Reply($client, \$reply, "$cmd:$tail");
2911: } else {
2912: &Failure($client, "invalid_token\n", "$cmd:$tail");
2913: }
2914: return 1;
2915:
2916: }
2917: ®ister_handler("tokenauthuserfile", \&token_auth_user_file_handler, 0,1,0);
2918:
2919: #
2920: # Unsubscribe from a resource.
2921: #
2922: # Parameters:
2923: # $cmd - The command that got us here.
2924: # $tail - Tail of the command (remaining parameters).
2925: # $client - File descriptor connected to client.
2926: # Returns
2927: # 0 - Requested to exit, caller should shut down.
2928: # 1 - Continue processing.
2929: #
2930: sub unsubscribe_handler {
2931: my ($cmd, $tail, $client) = @_;
2932:
2933: my $userinput= "$cmd:$tail";
2934:
2935: my ($fname) = split(/:/,$tail); # Split in case there's extrs.
2936:
2937: &Debug("Unsubscribing $fname");
2938: if (-e $fname) {
2939: &Debug("Exists");
2940: &Reply($client, &unsub($fname,$clientip), $userinput);
2941: } else {
2942: &Failure($client, "not_found\n", $userinput);
2943: }
2944: return 1;
2945: }
2946: ®ister_handler("unsub", \&unsubscribe_handler, 0, 1, 0);
2947:
2948: # Subscribe to a resource
2949: #
2950: # Parameters:
2951: # $cmd - The command that got us here.
2952: # $tail - Tail of the command (remaining parameters).
2953: # $client - File descriptor connected to client.
2954: # Returns
2955: # 0 - Requested to exit, caller should shut down.
2956: # 1 - Continue processing.
2957: #
2958: sub subscribe_handler {
2959: my ($cmd, $tail, $client)= @_;
2960:
2961: my $userinput = "$cmd:$tail";
2962:
2963: &Reply( $client, &subscribe($userinput,$clientip), $userinput);
2964:
2965: return 1;
2966: }
2967: ®ister_handler("sub", \&subscribe_handler, 0, 1, 0);
2968:
2969: #
2970: # Determine the latest version of a resource (it looks for the highest
2971: # past version and then returns that +1)
2972: #
2973: # Parameters:
2974: # $cmd - The command that got us here.
2975: # $tail - Tail of the command (remaining parameters).
2976: # (Should consist of an absolute path to a file)
2977: # $client - File descriptor connected to client.
2978: # Returns
2979: # 0 - Requested to exit, caller should shut down.
2980: # 1 - Continue processing.
2981: #
2982: sub current_version_handler {
2983: my ($cmd, $tail, $client) = @_;
2984:
2985: my $userinput= "$cmd:$tail";
2986:
2987: my $fname = $tail;
2988: &Reply( $client, ¤tversion($fname)."\n", $userinput);
2989: return 1;
2990:
2991: }
2992: ®ister_handler("currentversion", \¤t_version_handler, 0, 1, 0);
2993:
2994: # Make an entry in a user's activity log.
2995: #
2996: # Parameters:
2997: # $cmd - The command that got us here.
2998: # $tail - Tail of the command (remaining parameters).
2999: # $client - File descriptor connected to client.
3000: # Returns
3001: # 0 - Requested to exit, caller should shut down.
3002: # 1 - Continue processing.
3003: #
3004: sub activity_log_handler {
3005: my ($cmd, $tail, $client) = @_;
3006:
3007:
3008: my $userinput= "$cmd:$tail";
3009:
3010: my ($udom,$uname,$what)=split(/:/,$tail);
3011: chomp($what);
3012: my $proname=&propath($udom,$uname);
3013: my $now=time;
3014: my $hfh;
3015: if ($hfh=IO::File->new(">>$proname/activity.log")) {
3016: print $hfh "$now:$clientname:$what\n";
3017: &Reply( $client, "ok\n", $userinput);
3018: } else {
3019: &Failure($client, "error: ".($!+0)." IO::File->new Failed "
3020: ."while attempting log\n",
3021: $userinput);
3022: }
3023:
3024: return 1;
3025: }
3026: ®ister_handler("log", \&activity_log_handler, 0, 1, 0);
3027:
3028: #
3029: # Put a namespace entry in a user profile hash.
3030: # My druthers would be for this to be an encrypted interaction too.
3031: # anything that might be an inadvertent covert channel about either
3032: # user authentication or user personal information....
3033: #
3034: # Parameters:
3035: # $cmd - The command that got us here.
3036: # $tail - Tail of the command (remaining parameters).
3037: # $client - File descriptor connected to client.
3038: # Returns
3039: # 0 - Requested to exit, caller should shut down.
3040: # 1 - Continue processing.
3041: #
3042: sub put_user_profile_entry {
3043: my ($cmd, $tail, $client) = @_;
3044:
3045: my $userinput = "$cmd:$tail";
3046:
3047: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
3048: if ($namespace ne 'roles') {
3049: chomp($what);
3050: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3051: &GDBM_WRCREAT(),"P",$what);
3052: if($hashref) {
3053: my @pairs=split(/\&/,$what);
3054: foreach my $pair (@pairs) {
3055: my ($key,$value)=split(/=/,$pair);
3056: $hashref->{$key}=$value;
3057: }
3058: if (&untie_user_hash($hashref)) {
3059: &Reply( $client, "ok\n", $userinput);
3060: } else {
3061: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
3062: "while attempting put\n",
3063: $userinput);
3064: }
3065: } else {
3066: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3067: "while attempting put\n", $userinput);
3068: }
3069: } else {
3070: &Failure( $client, "refused\n", $userinput);
3071: }
3072:
3073: return 1;
3074: }
3075: ®ister_handler("put", \&put_user_profile_entry, 0, 1, 0);
3076:
3077: # Put a piece of new data in hash, returns error if entry already exists
3078: # Parameters:
3079: # $cmd - The command that got us here.
3080: # $tail - Tail of the command (remaining parameters).
3081: # $client - File descriptor connected to client.
3082: # Returns
3083: # 0 - Requested to exit, caller should shut down.
3084: # 1 - Continue processing.
3085: #
3086: sub newput_user_profile_entry {
3087: my ($cmd, $tail, $client) = @_;
3088:
3089: my $userinput = "$cmd:$tail";
3090:
3091: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
3092: if ($namespace eq 'roles') {
3093: &Failure( $client, "refused\n", $userinput);
3094: return 1;
3095: }
3096:
3097: chomp($what);
3098:
3099: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3100: &GDBM_WRCREAT(),"N",$what);
3101: if(!$hashref) {
3102: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3103: "while attempting put\n", $userinput);
3104: return 1;
3105: }
3106:
3107: my @pairs=split(/\&/,$what);
3108: foreach my $pair (@pairs) {
3109: my ($key,$value)=split(/=/,$pair);
3110: if (exists($hashref->{$key})) {
3111: if (!&untie_user_hash($hashref)) {
3112: &logthis("error: ".($!+0)." untie (GDBM) failed ".
3113: "while attempting newput - early out as key exists");
3114: }
3115: &Failure($client, "key_exists: ".$key."\n",$userinput);
3116: return 1;
3117: }
3118: }
3119:
3120: foreach my $pair (@pairs) {
3121: my ($key,$value)=split(/=/,$pair);
3122: $hashref->{$key}=$value;
3123: }
3124:
3125: if (&untie_user_hash($hashref)) {
3126: &Reply( $client, "ok\n", $userinput);
3127: } else {
3128: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
3129: "while attempting put\n",
3130: $userinput);
3131: }
3132: return 1;
3133: }
3134: ®ister_handler("newput", \&newput_user_profile_entry, 0, 1, 0);
3135:
3136: #
3137: # Increment a profile entry in the user history file.
3138: # The history contains keyword value pairs. In this case,
3139: # The value itself is a pair of numbers. The first, the current value
3140: # the second an increment that this function applies to the current
3141: # value.
3142: #
3143: # Parameters:
3144: # $cmd - The command that got us here.
3145: # $tail - Tail of the command (remaining parameters).
3146: # $client - File descriptor connected to client.
3147: # Returns
3148: # 0 - Requested to exit, caller should shut down.
3149: # 1 - Continue processing.
3150: #
3151: sub increment_user_value_handler {
3152: my ($cmd, $tail, $client) = @_;
3153:
3154: my $userinput = "$cmd:$tail";
3155:
3156: my ($udom,$uname,$namespace,$what) =split(/:/,$tail);
3157: if ($namespace ne 'roles') {
3158: chomp($what);
3159: my $hashref = &tie_user_hash($udom, $uname,
3160: $namespace, &GDBM_WRCREAT(),
3161: "P",$what);
3162: if ($hashref) {
3163: my @pairs=split(/\&/,$what);
3164: foreach my $pair (@pairs) {
3165: my ($key,$value)=split(/=/,$pair);
3166: $value = &unescape($value);
3167: # We could check that we have a number...
3168: if (! defined($value) || $value eq '') {
3169: $value = 1;
3170: }
3171: $hashref->{$key}+=$value;
3172: if ($namespace eq 'nohist_resourcetracker') {
3173: if ($hashref->{$key} < 0) {
3174: $hashref->{$key} = 0;
3175: }
3176: }
3177: }
3178: if (&untie_user_hash($hashref)) {
3179: &Reply( $client, "ok\n", $userinput);
3180: } else {
3181: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
3182: "while attempting inc\n", $userinput);
3183: }
3184: } else {
3185: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3186: "while attempting inc\n", $userinput);
3187: }
3188: } else {
3189: &Failure($client, "refused\n", $userinput);
3190: }
3191:
3192: return 1;
3193: }
3194: ®ister_handler("inc", \&increment_user_value_handler, 0, 1, 0);
3195:
3196: #
3197: # Put a new role for a user. Roles are LonCAPA's packaging of permissions.
3198: # Each 'role' a user has implies a set of permissions. Adding a new role
3199: # for a person grants the permissions packaged with that role
3200: # to that user when the role is selected.
3201: #
3202: # Parameters:
3203: # $cmd - The command string (rolesput).
3204: # $tail - The remainder of the request line. For rolesput this
3205: # consists of a colon separated list that contains:
3206: # The domain and user that is granting the role (logged).
3207: # The domain and user that is getting the role.
3208: # The roles being granted as a set of & separated pairs.
3209: # each pair a key value pair.
3210: # $client - File descriptor connected to the client.
3211: # Returns:
3212: # 0 - If the daemon should exit
3213: # 1 - To continue processing.
3214: #
3215: #
3216: sub roles_put_handler {
3217: my ($cmd, $tail, $client) = @_;
3218:
3219: my $userinput = "$cmd:$tail";
3220:
3221: my ( $exedom, $exeuser, $udom, $uname, $what) = split(/:/,$tail);
3222:
3223:
3224: my $namespace='roles';
3225: chomp($what);
3226: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3227: &GDBM_WRCREAT(), "P",
3228: "$exedom:$exeuser:$what");
3229: #
3230: # Log the attempt to set a role. The {}'s here ensure that the file
3231: # handle is open for the minimal amount of time. Since the flush
3232: # is done on close this improves the chances the log will be an un-
3233: # corrupted ordered thing.
3234: if ($hashref) {
3235: my $pass_entry = &get_auth_type($udom, $uname);
3236: my ($auth_type,$pwd) = split(/:/, $pass_entry);
3237: $auth_type = $auth_type.":";
3238: my @pairs=split(/\&/,$what);
3239: foreach my $pair (@pairs) {
3240: my ($key,$value)=split(/=/,$pair);
3241: &manage_permissions($key, $udom, $uname,
3242: $auth_type);
3243: $hashref->{$key}=$value;
3244: }
3245: if (&untie_user_hash($hashref)) {
3246: &Reply($client, "ok\n", $userinput);
3247: } else {
3248: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3249: "while attempting rolesput\n", $userinput);
3250: }
3251: } else {
3252: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3253: "while attempting rolesput\n", $userinput);
3254: }
3255: return 1;
3256: }
3257: ®ister_handler("rolesput", \&roles_put_handler, 1,1,0); # Encoded client only.
3258:
3259: #
3260: # Deletes (removes) a role for a user. This is equivalent to removing
3261: # a permissions package associated with the role from the user's profile.
3262: #
3263: # Parameters:
3264: # $cmd - The command (rolesdel)
3265: # $tail - The remainder of the request line. This consists
3266: # of:
3267: # The domain and user requesting the change (logged)
3268: # The domain and user being changed.
3269: # The roles being revoked. These are shipped to us
3270: # as a bunch of & separated role name keywords.
3271: # $client - The file handle open on the client.
3272: # Returns:
3273: # 1 - Continue processing
3274: # 0 - Exit.
3275: #
3276: sub roles_delete_handler {
3277: my ($cmd, $tail, $client) = @_;
3278:
3279: my $userinput = "$cmd:$tail";
3280:
3281: my ($exedom,$exeuser,$udom,$uname,$what)=split(/:/,$tail);
3282: &Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom.
3283: "what = ".$what);
3284: my $namespace='roles';
3285: chomp($what);
3286: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3287: &GDBM_WRCREAT(), "D",
3288: "$exedom:$exeuser:$what");
3289:
3290: if ($hashref) {
3291: my @rolekeys=split(/\&/,$what);
3292:
3293: foreach my $key (@rolekeys) {
3294: delete $hashref->{$key};
3295: }
3296: if (&untie_user_hash($hashref)) {
3297: &Reply($client, "ok\n", $userinput);
3298: } else {
3299: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3300: "while attempting rolesdel\n", $userinput);
3301: }
3302: } else {
3303: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3304: "while attempting rolesdel\n", $userinput);
3305: }
3306:
3307: return 1;
3308: }
3309: ®ister_handler("rolesdel", \&roles_delete_handler, 1,1, 0); # Encoded client only
3310:
3311: # Unencrypted get from a user's profile database. See
3312: # GetProfileEntryEncrypted for a version that does end-to-end encryption.
3313: # This function retrieves a keyed item from a specific named database in the
3314: # user's directory.
3315: #
3316: # Parameters:
3317: # $cmd - Command request keyword (get).
3318: # $tail - Tail of the command. This is a colon separated list
3319: # consisting of the domain and username that uniquely
3320: # identifies the profile,
3321: # The 'namespace' which selects the gdbm file to
3322: # do the lookup in,
3323: # & separated list of keys to lookup. Note that
3324: # the values are returned as an & separated list too.
3325: # $client - File descriptor open on the client.
3326: # Returns:
3327: # 1 - Continue processing.
3328: # 0 - Exit.
3329: #
3330: sub get_profile_entry {
3331: my ($cmd, $tail, $client) = @_;
3332:
3333: my $userinput= "$cmd:$tail";
3334:
3335: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
3336: chomp($what);
3337:
3338:
3339: my $replystring = read_profile($udom, $uname, $namespace, $what);
3340: my ($first) = split(/:/,$replystring);
3341: if($first ne "error") {
3342: &Reply($client, \$replystring, $userinput);
3343: } else {
3344: &Failure($client, $replystring." while attempting get\n", $userinput);
3345: }
3346: return 1;
3347:
3348:
3349: }
3350: ®ister_handler("get", \&get_profile_entry, 0,1,0);
3351:
3352: #
3353: # Process the encrypted get request. Note that the request is sent
3354: # in clear, but the reply is encrypted. This is a small covert channel:
3355: # information about the sensitive keys is given to the snooper. Just not
3356: # information about the values of the sensitive key. Hmm if I wanted to
3357: # know these I'd snoop for the egets. Get the profile item names from them
3358: # and then issue a get for them since there's no enforcement of the
3359: # requirement of an encrypted get for particular profile items. If I
3360: # were re-doing this, I'd force the request to be encrypted as well as the
3361: # reply. I'd also just enforce encrypted transactions for all gets since
3362: # that would prevent any covert channel snooping.
3363: #
3364: # Parameters:
3365: # $cmd - Command keyword of request (eget).
3366: # $tail - Tail of the command. See GetProfileEntry
# for more information about this.
3367: # $client - File open on the client.
3368: # Returns:
3369: # 1 - Continue processing
3370: # 0 - server should exit.
3371: sub get_profile_entry_encrypted {
3372: my ($cmd, $tail, $client) = @_;
3373:
3374: my $userinput = "$cmd:$tail";
3375:
3376: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
3377: chomp($what);
3378: my $qresult = read_profile($udom, $uname, $namespace, $what);
3379: my ($first) = split(/:/, $qresult);
3380: if($first ne "error") {
3381:
3382: if ($cipher) {
3383: my $cmdlength=length($qresult);
3384: $qresult.=" ";
3385: my $encqresult='';
3386: for(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
3387: $encqresult.= unpack("H16",
3388: $cipher->encrypt(substr($qresult,
3389: $encidx,
3390: 8)));
3391: }
3392: &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput);
3393: } else {
3394: &Failure( $client, "error:no_key\n", $userinput);
3395: }
3396: } else {
3397: &Failure($client, "$qresult while attempting eget\n", $userinput);
3398:
3399: }
3400:
3401: return 1;
3402: }
3403: ®ister_handler("eget", \&get_profile_entry_encrypted, 0, 1, 0);
3404:
3405: #
3406: # Deletes a key in a user profile database.
3407: #
3408: # Parameters:
3409: # $cmd - Command keyword (del).
3410: # $tail - Command tail. IN this case a colon
3411: # separated list containing:
3412: # The domain and user that identifies uniquely
3413: # the identity of the user.
3414: # The profile namespace (name of the profile
3415: # database file).
3416: # & separated list of keywords to delete.
3417: # $client - File open on client socket.
3418: # Returns:
3419: # 1 - Continue processing
3420: # 0 - Exit server.
3421: #
3422: #
3423: sub delete_profile_entry {
3424: my ($cmd, $tail, $client) = @_;
3425:
3426: my $userinput = "cmd:$tail";
3427:
3428: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
3429: chomp($what);
3430: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3431: &GDBM_WRCREAT(),
3432: "D",$what);
3433: if ($hashref) {
3434: my @keys=split(/\&/,$what);
3435: foreach my $key (@keys) {
3436: delete($hashref->{$key});
3437: }
3438: if (&untie_user_hash($hashref)) {
3439: &Reply($client, "ok\n", $userinput);
3440: } else {
3441: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3442: "while attempting del\n", $userinput);
3443: }
3444: } else {
3445: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3446: "while attempting del\n", $userinput);
3447: }
3448: return 1;
3449: }
3450: ®ister_handler("del", \&delete_profile_entry, 0, 1, 0);
3451:
3452: #
3453: # List the set of keys that are defined in a profile database file.
3454: # A successful reply from this will contain an & separated list of
3455: # the keys.
3456: # Parameters:
3457: # $cmd - Command request (keys).
3458: # $tail - Remainder of the request, a colon separated
3459: # list containing domain/user that identifies the
3460: # user being queried, and the database namespace
3461: # (database filename essentially).
3462: # $client - File open on the client.
3463: # Returns:
3464: # 1 - Continue processing.
3465: # 0 - Exit the server.
3466: #
3467: sub get_profile_keys {
3468: my ($cmd, $tail, $client) = @_;
3469:
3470: my $userinput = "$cmd:$tail";
3471:
3472: my ($udom,$uname,$namespace)=split(/:/,$tail);
3473: my $qresult='';
3474: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3475: &GDBM_READER());
3476: if ($hashref) {
3477: foreach my $key (keys %$hashref) {
3478: $qresult.="$key&";
3479: }
3480: if (&untie_user_hash($hashref)) {
3481: $qresult=~s/\&$//;
3482: &Reply($client, \$qresult, $userinput);
3483: } else {
3484: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3485: "while attempting keys\n", $userinput);
3486: }
3487: } else {
3488: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3489: "while attempting keys\n", $userinput);
3490: }
3491:
3492: return 1;
3493: }
3494: ®ister_handler("keys", \&get_profile_keys, 0, 1, 0);
3495:
3496: #
3497: # Dump the contents of a user profile database.
3498: # Note that this constitutes a very large covert channel too since
3499: # the dump will return sensitive information that is not encrypted.
3500: # The naive security assumption is that the session negotiation ensures
3501: # our client is trusted and I don't believe that's assured at present.
3502: # Sure want badly to go to ssl or tls. Of course if my peer isn't really
3503: # a LonCAPA node they could have negotiated an encryption key too so >sigh<.
3504: #
3505: # Parameters:
3506: # $cmd - The command request keyword (currentdump).
3507: # $tail - Remainder of the request, consisting of a colon
3508: # separated list that has the domain/username and
3509: # the namespace to dump (database file).
3510: # $client - file open on the remote client.
3511: # Returns:
3512: # 1 - Continue processing.
3513: # 0 - Exit the server.
3514: #
3515: sub dump_profile_database {
3516: my ($cmd, $tail, $client) = @_;
3517:
3518: my $res = LONCAPA::Lond::dump_profile_database($tail);
3519:
3520: if ($res =~ /^error:/) {
3521: Failure($client, \$res, "$cmd:$tail");
3522: } else {
3523: Reply($client, \$res, "$cmd:$tail");
3524: }
3525:
3526: return 1;
3527:
3528: #TODO remove
3529: my $userinput = "$cmd:$tail";
3530:
3531: my ($udom,$uname,$namespace) = split(/:/,$tail);
3532: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3533: &GDBM_READER());
3534: if ($hashref) {
3535: # Structure of %data:
3536: # $data{$symb}->{$parameter}=$value;
3537: # $data{$symb}->{'v.'.$parameter}=$version;
3538: # since $parameter will be unescaped, we do not
3539: # have to worry about silly parameter names...
3540:
3541: my $qresult='';
3542: my %data = (); # A hash of anonymous hashes..
3543: while (my ($key,$value) = each(%$hashref)) {
3544: my ($v,$symb,$param) = split(/:/,$key);
3545: next if ($v eq 'version' || $symb eq 'keys');
3546: next if (exists($data{$symb}) &&
3547: exists($data{$symb}->{$param}) &&
3548: $data{$symb}->{'v.'.$param} > $v);
3549: $data{$symb}->{$param}=$value;
3550: $data{$symb}->{'v.'.$param}=$v;
3551: }
3552: if (&untie_user_hash($hashref)) {
3553: while (my ($symb,$param_hash) = each(%data)) {
3554: while(my ($param,$value) = each (%$param_hash)){
3555: next if ($param =~ /^v\./); # Ignore versions...
3556: #
3557: # Just dump the symb=value pairs separated by &
3558: #
3559: $qresult.=$symb.':'.$param.'='.$value.'&';
3560: }
3561: }
3562: chop($qresult);
3563: &Reply($client , \$qresult, $userinput);
3564: } else {
3565: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3566: "while attempting currentdump\n", $userinput);
3567: }
3568: } else {
3569: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3570: "while attempting currentdump\n", $userinput);
3571: }
3572:
3573: return 1;
3574: }
3575: ®ister_handler("currentdump", \&dump_profile_database, 0, 1, 0);
3576:
3577: #
3578: # Dump a profile database with an optional regular expression
3579: # to match against the keys. In this dump, no effort is made
3580: # to separate symb from version information. Presumably the
3581: # databases that are dumped by this command are of a different
3582: # structure. Need to look at this and improve the documentation of
3583: # both this and the currentdump handler.
3584: # Parameters:
3585: # $cmd - The command keyword.
3586: # $tail - All of the characters after the $cmd:
3587: # These are expected to be a colon
3588: # separated list containing:
3589: # domain/user - identifying the user.
3590: # namespace - identifying the database.
3591: # regexp - optional regular expression
3592: # that is matched against
3593: # database keywords to do
3594: # selective dumps.
3595: # range - optional range of entries
3596: # e.g., 10-20 would return the
3597: # 10th to 19th items, etc.
3598: # $client - Channel open on the client.
3599: # Returns:
3600: # 1 - Continue processing.
3601: # Side effects:
3602: # response is written to $client.
3603: #
3604: sub dump_with_regexp {
3605: my ($cmd, $tail, $client) = @_;
3606:
3607: my $res = LONCAPA::Lond::dump_with_regexp($tail, $clientversion);
3608:
3609: if ($res =~ /^error:/) {
3610: Failure($client, \$res, "$cmd:$tail");
3611: } else {
3612: Reply($client, \$res, "$cmd:$tail");
3613: }
3614:
3615: return 1;
3616: }
3617: ®ister_handler("dump", \&dump_with_regexp, 0, 1, 0);
3618:
3619: # Store a set of key=value pairs associated with a versioned name.
3620: #
3621: # Parameters:
3622: # $cmd - Request command keyword.
3623: # $tail - Tail of the request. This is a colon
3624: # separated list containing:
3625: # domain/user - User and authentication domain.
3626: # namespace - Name of the database being modified
3627: # rid - Resource keyword to modify.
3628: # what - new value associated with rid.
3629: # laststore - (optional) version=timestamp
3630: # for most recent transaction for rid
3631: # in namespace, when cstore was called
3632: #
3633: # $client - Socket open on the client.
3634: #
3635: #
3636: # Returns:
3637: # 1 (keep on processing).
3638: # Side-Effects:
3639: # Writes to the client
3640: # Successful storage will cause either 'ok', or, if $laststore was included
3641: # in the tail of the request, and the version number for the last transaction
3642: # is larger than the version in $laststore, delay:$numtrans , where $numtrans
3643: # is the number of store evevnts recorded for rid in namespace since
3644: # lonnet::store() was called by the client.
3645: #
3646: sub store_handler {
3647: my ($cmd, $tail, $client) = @_;
3648:
3649: my $userinput = "$cmd:$tail";
3650: chomp($tail);
3651: my ($udom,$uname,$namespace,$rid,$what,$laststore) =split(/:/,$tail);
3652: if ($namespace ne 'roles') {
3653:
3654: my @pairs=split(/\&/,$what);
3655: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3656: &GDBM_WRCREAT(), "S",
3657: "$rid:$what");
3658: if ($hashref) {
3659: my $now = time;
3660: my $numtrans;
3661: if ($laststore) {
3662: my ($previousversion,$previoustime) = split(/\=/,$laststore);
3663: my ($lastversion,$lasttime) = (0,0);
3664: $lastversion = $hashref->{"version:$rid"};
3665: if ($lastversion) {
3666: $lasttime = $hashref->{"$lastversion:$rid:timestamp"};
3667: }
3668: if (($previousversion) && ($previousversion !~ /\D/)) {
3669: if (($lastversion > $previousversion) && ($lasttime >= $previoustime)) {
3670: $numtrans = $lastversion - $previousversion;
3671: }
3672: } elsif ($lastversion) {
3673: $numtrans = $lastversion;
3674: }
3675: if ($numtrans) {
3676: $numtrans =~ s/D//g;
3677: }
3678: }
3679: $hashref->{"version:$rid"}++;
3680: my $version=$hashref->{"version:$rid"};
3681: my $allkeys='';
3682: foreach my $pair (@pairs) {
3683: my ($key,$value)=split(/=/,$pair);
3684: $allkeys.=$key.':';
3685: $hashref->{"$version:$rid:$key"}=$value;
3686: }
3687: $hashref->{"$version:$rid:timestamp"}=$now;
3688: $allkeys.='timestamp';
3689: $hashref->{"$version:keys:$rid"}=$allkeys;
3690: if (&untie_user_hash($hashref)) {
3691: my $msg = 'ok';
3692: if ($numtrans) {
3693: $msg = 'delay:'.$numtrans;
3694: }
3695: &Reply($client, "$msg\n", $userinput);
3696: } else {
3697: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3698: "while attempting store\n", $userinput);
3699: }
3700: } else {
3701: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3702: "while attempting store\n", $userinput);
3703: }
3704: } else {
3705: &Failure($client, "refused\n", $userinput);
3706: }
3707:
3708: return 1;
3709: }
3710: ®ister_handler("store", \&store_handler, 0, 1, 0);
3711:
3712: # Modify a set of key=value pairs associated with a versioned name.
3713: #
3714: # Parameters:
3715: # $cmd - Request command keyword.
3716: # $tail - Tail of the request. This is a colon
3717: # separated list containing:
3718: # domain/user - User and authentication domain.
3719: # namespace - Name of the database being modified
3720: # rid - Resource keyword to modify.
3721: # v - Version item to modify
3722: # what - new value associated with rid.
3723: #
3724: # $client - Socket open on the client.
3725: #
3726: #
3727: # Returns:
3728: # 1 (keep on processing).
3729: # Side-Effects:
3730: # Writes to the client
3731: sub putstore_handler {
3732: my ($cmd, $tail, $client) = @_;
3733:
3734: my $userinput = "$cmd:$tail";
3735:
3736: my ($udom,$uname,$namespace,$rid,$v,$what) =split(/:/,$tail);
3737: if ($namespace ne 'roles') {
3738:
3739: chomp($what);
3740: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3741: &GDBM_WRCREAT(), "M",
3742: "$rid:$v:$what");
3743: if ($hashref) {
3744: my $now = time;
3745: my %data = &hash_extract($what);
3746: my @allkeys;
3747: while (my($key,$value) = each(%data)) {
3748: push(@allkeys,$key);
3749: $hashref->{"$v:$rid:$key"} = $value;
3750: }
3751: my $allkeys = join(':',@allkeys);
3752: $hashref->{"$v:keys:$rid"}=$allkeys;
3753:
3754: if (&untie_user_hash($hashref)) {
3755: &Reply($client, "ok\n", $userinput);
3756: } else {
3757: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3758: "while attempting store\n", $userinput);
3759: }
3760: } else {
3761: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3762: "while attempting store\n", $userinput);
3763: }
3764: } else {
3765: &Failure($client, "refused\n", $userinput);
3766: }
3767:
3768: return 1;
3769: }
3770: ®ister_handler("putstore", \&putstore_handler, 0, 1, 0);
3771:
3772: sub hash_extract {
3773: my ($str)=@_;
3774: my %hash;
3775: foreach my $pair (split(/\&/,$str)) {
3776: my ($key,$value)=split(/=/,$pair);
3777: $hash{$key}=$value;
3778: }
3779: return (%hash);
3780: }
3781: sub hash_to_str {
3782: my ($hash_ref)=@_;
3783: my $str;
3784: foreach my $key (keys(%$hash_ref)) {
3785: $str.=$key.'='.$hash_ref->{$key}.'&';
3786: }
3787: $str=~s/\&$//;
3788: return $str;
3789: }
3790:
3791: #
3792: # Dump out all versions of a resource that has key=value pairs associated
3793: # with it for each version. These resources are built up via the store
3794: # command.
3795: #
3796: # Parameters:
3797: # $cmd - Command keyword.
3798: # $tail - Remainder of the request which consists of:
3799: # domain/user - User and auth. domain.
3800: # namespace - name of resource database.
3801: # rid - Resource id.
3802: # $client - socket open on the client.
3803: #
3804: # Returns:
3805: # 1 indicating the caller should not yet exit.
3806: # Side-effects:
3807: # Writes a reply to the client.
3808: # The reply is a string of the following shape:
3809: # version=current&version:keys=k1:k2...&1:k1=v1&1:k2=v2...
3810: # Where the 1 above represents version 1.
3811: # this continues for all pairs of keys in all versions.
3812: #
3813: #
3814: #
3815: #
3816: sub restore_handler {
3817: my ($cmd, $tail, $client) = @_;
3818:
3819: my $userinput = "$cmd:$tail"; # Only used for logging purposes.
3820: my ($udom,$uname,$namespace,$rid) = split(/:/,$tail);
3821: $namespace=~s/\//\_/g;
3822: $namespace = &LONCAPA::clean_username($namespace);
3823:
3824: chomp($rid);
3825: my $qresult='';
3826: my $hashref = &tie_user_hash($udom, $uname, $namespace, &GDBM_READER());
3827: if ($hashref) {
3828: my $version=$hashref->{"version:$rid"};
3829: $qresult.="version=$version&";
3830: my $scope;
3831: for ($scope=1;$scope<=$version;$scope++) {
3832: my $vkeys=$hashref->{"$scope:keys:$rid"};
3833: my @keys=split(/:/,$vkeys);
3834: my $key;
3835: $qresult.="$scope:keys=$vkeys&";
3836: foreach $key (@keys) {
3837: $qresult.="$scope:$key=".$hashref->{"$scope:$rid:$key"}."&";
3838: }
3839: }
3840: if (&untie_user_hash($hashref)) {
3841: $qresult=~s/\&$//;
3842: &Reply( $client, \$qresult, $userinput);
3843: } else {
3844: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3845: "while attempting restore\n", $userinput);
3846: }
3847: } else {
3848: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3849: "while attempting restore\n", $userinput);
3850: }
3851:
3852: return 1;
3853:
3854:
3855: }
3856: ®ister_handler("restore", \&restore_handler, 0,1,0);
3857:
3858: #
3859: # Add a chat message to a synchronous discussion board.
3860: #
3861: # Parameters:
3862: # $cmd - Request keyword.
3863: # $tail - Tail of the command. A colon separated list
3864: # containing:
3865: # cdom - Domain on which the chat board lives
3866: # cnum - Course containing the chat board.
3867: # newpost - Body of the posting.
3868: # group - Optional group, if chat board is only
3869: # accessible in a group within the course
3870: # $client - Socket open on the client.
3871: # Returns:
3872: # 1 - Indicating caller should keep on processing.
3873: #
3874: # Side-effects:
3875: # writes a reply to the client.
3876: #
3877: #
3878: sub send_chat_handler {
3879: my ($cmd, $tail, $client) = @_;
3880:
3881:
3882: my $userinput = "$cmd:$tail";
3883:
3884: my ($cdom,$cnum,$newpost,$group)=split(/\:/,$tail);
3885: &chat_add($cdom,$cnum,$newpost,$group);
3886: &Reply($client, "ok\n", $userinput);
3887:
3888: return 1;
3889: }
3890: ®ister_handler("chatsend", \&send_chat_handler, 0, 1, 0);
3891:
3892: #
3893: # Retrieve the set of chat messages from a discussion board.
3894: #
3895: # Parameters:
3896: # $cmd - Command keyword that initiated the request.
3897: # $tail - Remainder of the request after the command
3898: # keyword. In this case a colon separated list of
3899: # chat domain - Which discussion board.
3900: # chat id - Discussion thread(?)
3901: # domain/user - Authentication domain and username
3902: # of the requesting person.
3903: # group - Optional course group containing
3904: # the board.
3905: # $client - Socket open on the client program.
3906: # Returns:
3907: # 1 - continue processing
3908: # Side effects:
3909: # Response is written to the client.
3910: #
3911: sub retrieve_chat_handler {
3912: my ($cmd, $tail, $client) = @_;
3913:
3914:
3915: my $userinput = "$cmd:$tail";
3916:
3917: my ($cdom,$cnum,$udom,$uname,$group)=split(/\:/,$tail);
3918: my $reply='';
3919: foreach (&get_chat($cdom,$cnum,$udom,$uname,$group)) {
3920: $reply.=&escape($_).':';
3921: }
3922: $reply=~s/\:$//;
3923: &Reply($client, \$reply, $userinput);
3924:
3925:
3926: return 1;
3927: }
3928: ®ister_handler("chatretr", \&retrieve_chat_handler, 0, 1, 0);
3929:
3930: #
3931: # Initiate a query of an sql database. SQL query repsonses get put in
3932: # a file for later retrieval. This prevents sql query results from
3933: # bottlenecking the system. Note that with loncnew, perhaps this is
3934: # less of an issue since multiple outstanding requests can be concurrently
3935: # serviced.
3936: #
3937: # Parameters:
3938: # $cmd - COmmand keyword that initiated the request.
3939: # $tail - Remainder of the command after the keyword.
3940: # For this function, this consists of a query and
3941: # 3 arguments that are self-documentingly labelled
3942: # in the original arg1, arg2, arg3.
3943: # $client - Socket open on the client.
3944: # Return:
3945: # 1 - Indicating processing should continue.
3946: # Side-effects:
3947: # a reply is written to $client.
3948: #
3949: sub send_query_handler {
3950: my ($cmd, $tail, $client) = @_;
3951:
3952:
3953: my $userinput = "$cmd:$tail";
3954:
3955: my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail);
3956: $query=~s/\n*$//g;
3957: &Reply($client, "". &sql_reply("$clientname\&$query".
3958: "\&$arg1"."\&$arg2"."\&$arg3")."\n",
3959: $userinput);
3960:
3961: return 1;
3962: }
3963: ®ister_handler("querysend", \&send_query_handler, 0, 1, 0);
3964:
3965: #
3966: # Add a reply to an sql query. SQL queries are done asyncrhonously.
3967: # The query is submitted via a "querysend" transaction.
3968: # There it is passed on to the lonsql daemon, queued and issued to
3969: # mysql.
3970: # This transaction is invoked when the sql transaction is complete
3971: # it stores the query results in flie and indicates query completion.
3972: # presumably local software then fetches this response... I'm guessing
3973: # the sequence is: lonc does a querysend, we ask lonsql to do it.
3974: # lonsql on completion of the query interacts with the lond of our
3975: # client to do a query reply storing two files:
3976: # - id - The results of the query.
3977: # - id.end - Indicating the transaction completed.
3978: # NOTE: id is a unique id assigned to the query and querysend time.
3979: # Parameters:
3980: # $cmd - Command keyword that initiated this request.
3981: # $tail - Remainder of the tail. In this case that's a colon
3982: # separated list containing the query Id and the
3983: # results of the query.
3984: # $client - Socket open on the client.
3985: # Return:
3986: # 1 - Indicating that we should continue processing.
3987: # Side effects:
3988: # ok written to the client.
3989: #
3990: sub reply_query_handler {
3991: my ($cmd, $tail, $client) = @_;
3992:
3993:
3994: my $userinput = "$cmd:$tail";
3995:
3996: my ($id,$reply)=split(/:/,$tail);
3997: my $store;
3998: my $execdir=$perlvar{'lonDaemons'};
3999: if ($store=IO::File->new(">$execdir/tmp/$id")) {
4000: $reply=~s/\&/\n/g;
4001: print $store $reply;
4002: close $store;
4003: my $store2=IO::File->new(">$execdir/tmp/$id.end");
4004: print $store2 "done\n";
4005: close $store2;
4006: &Reply($client, "ok\n", $userinput);
4007: } else {
4008: &Failure($client, "error: ".($!+0)
4009: ." IO::File->new Failed ".
4010: "while attempting queryreply\n", $userinput);
4011: }
4012:
4013:
4014: return 1;
4015: }
4016: ®ister_handler("queryreply", \&reply_query_handler, 0, 1, 0);
4017:
4018: #
4019: # Process the courseidput request. Not quite sure what this means
4020: # at the system level sense. It appears a gdbm file in the
4021: # /home/httpd/lonUsers/$domain/nohist_courseids is tied and
4022: # a set of entries made in that database.
4023: #
4024: # Parameters:
4025: # $cmd - The command keyword that initiated this request.
4026: # $tail - Tail of the command. In this case consists of a colon
4027: # separated list contaning the domain to apply this to and
4028: # an ampersand separated list of keyword=value pairs.
4029: # Each value is a colon separated list that includes:
4030: # description, institutional code and course owner.
4031: # For backward compatibility with versions included
4032: # in LON-CAPA 1.1.X (and earlier) and 1.2.X, institutional
4033: # code and/or course owner are preserved from the existing
4034: # record when writing a new record in response to 1.1 or
4035: # 1.2 implementations of lonnet::flushcourselogs().
4036: #
4037: # $client - Socket open on the client.
4038: # Returns:
4039: # 1 - indicating that processing should continue
4040: #
4041: # Side effects:
4042: # reply is written to the client.
4043: #
4044: sub put_course_id_handler {
4045: my ($cmd, $tail, $client) = @_;
4046:
4047:
4048: my $userinput = "$cmd:$tail";
4049:
4050: my ($udom, $what) = split(/:/, $tail,2);
4051: chomp($what);
4052: my $now=time;
4053: my @pairs=split(/\&/,$what);
4054:
4055: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
4056: if ($hashref) {
4057: foreach my $pair (@pairs) {
4058: my ($key,$courseinfo) = split(/=/,$pair,2);
4059: $courseinfo =~ s/=/:/g;
4060: if (defined($hashref->{$key})) {
4061: my $value = &Apache::lonnet::thaw_unescape($hashref->{$key});
4062: if (ref($value) eq 'HASH') {
4063: my @items = ('description','inst_code','owner','type');
4064: my @new_items = split(/:/,$courseinfo,-1);
4065: my %storehash;
4066: for (my $i=0; $i<@new_items; $i++) {
4067: $storehash{$items[$i]} = &unescape($new_items[$i]);
4068: }
4069: $hashref->{$key} =
4070: &Apache::lonnet::freeze_escape(\%storehash);
4071: my $unesc_key = &unescape($key);
4072: $hashref->{&escape('lasttime:'.$unesc_key)} = $now;
4073: next;
4074: }
4075: }
4076: my @current_items = split(/:/,$hashref->{$key},-1);
4077: shift(@current_items); # remove description
4078: pop(@current_items); # remove last access
4079: my $numcurrent = scalar(@current_items);
4080: if ($numcurrent > 3) {
4081: $numcurrent = 3;
4082: }
4083: my @new_items = split(/:/,$courseinfo,-1);
4084: my $numnew = scalar(@new_items);
4085: if ($numcurrent > 0) {
4086: if ($numnew <= $numcurrent) { # flushcourselogs() from pre 2.2
4087: for (my $j=$numcurrent-$numnew; $j>=0; $j--) {
4088: $courseinfo .= ':'.$current_items[$numcurrent-$j-1];
4089: }
4090: }
4091: }
4092: $hashref->{$key}=$courseinfo.':'.$now;
4093: }
4094: if (&untie_domain_hash($hashref)) {
4095: &Reply( $client, "ok\n", $userinput);
4096: } else {
4097: &Failure($client, "error: ".($!+0)
4098: ." untie(GDBM) Failed ".
4099: "while attempting courseidput\n", $userinput);
4100: }
4101: } else {
4102: &Failure($client, "error: ".($!+0)
4103: ." tie(GDBM) Failed ".
4104: "while attempting courseidput\n", $userinput);
4105: }
4106:
4107: return 1;
4108: }
4109: ®ister_handler("courseidput", \&put_course_id_handler, 0, 1, 0);
4110:
4111: sub put_course_id_hash_handler {
4112: my ($cmd, $tail, $client) = @_;
4113: my $userinput = "$cmd:$tail";
4114: my ($udom,$mode,$what) = split(/:/, $tail,3);
4115: chomp($what);
4116: my $now=time;
4117: my @pairs=split(/\&/,$what);
4118: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
4119: if ($hashref) {
4120: foreach my $pair (@pairs) {
4121: my ($key,$value)=split(/=/,$pair);
4122: my $unesc_key = &unescape($key);
4123: if ($mode ne 'timeonly') {
4124: if (!defined($hashref->{&escape('lasttime:'.$unesc_key)})) {
4125: my $curritems = &Apache::lonnet::thaw_unescape($key);
4126: if (ref($curritems) ne 'HASH') {
4127: my @current_items = split(/:/,$hashref->{$key},-1);
4128: my $lasttime = pop(@current_items);
4129: $hashref->{&escape('lasttime:'.$unesc_key)} = $lasttime;
4130: } else {
4131: $hashref->{&escape('lasttime:'.$unesc_key)} = '';
4132: }
4133: }
4134: $hashref->{$key} = $value;
4135: }
4136: if ($mode ne 'notime') {
4137: $hashref->{&escape('lasttime:'.$unesc_key)} = $now;
4138: }
4139: }
4140: if (&untie_domain_hash($hashref)) {
4141: &Reply($client, "ok\n", $userinput);
4142: } else {
4143: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4144: "while attempting courseidputhash\n", $userinput);
4145: }
4146: } else {
4147: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4148: "while attempting courseidputhash\n", $userinput);
4149: }
4150: return 1;
4151: }
4152: ®ister_handler("courseidputhash", \&put_course_id_hash_handler, 0, 1, 0);
4153:
4154: # Retrieves the value of a course id resource keyword pattern
4155: # defined since a starting date. Both the starting date and the
4156: # keyword pattern are optional. If the starting date is not supplied it
4157: # is treated as the beginning of time. If the pattern is not found,
4158: # it is treatred as "." matching everything.
4159: #
4160: # Parameters:
4161: # $cmd - Command keyword that resulted in us being dispatched.
4162: # $tail - The remainder of the command that, in this case, consists
4163: # of a colon separated list of:
4164: # domain - The domain in which the course database is
4165: # defined.
4166: # since - Optional parameter describing the minimum
4167: # time of definition(?) of the resources that
4168: # will match the dump.
4169: # description - regular expression that is used to filter
4170: # the dump. Only keywords matching this regexp
4171: # will be used.
4172: # institutional code - optional supplied code to filter
4173: # the dump. Only courses with an institutional code
4174: # that match the supplied code will be returned.
4175: # owner - optional supplied username and domain of owner to
4176: # filter the dump. Only courses for which the course
4177: # owner matches the supplied username and/or domain
4178: # will be returned. Pre-2.2.0 legacy entries from
4179: # nohist_courseiddump will only contain usernames.
4180: # type - optional parameter for selection
4181: # regexp_ok - if 1 or -1 allow the supplied institutional code
4182: # filter to behave as a regular expression:
4183: # 1 will not exclude the course if the instcode matches the RE
4184: # -1 will exclude the course if the instcode matches the RE
4185: # rtn_as_hash - whether to return the information available for
4186: # each matched item as a frozen hash of all
4187: # key, value pairs in the item's hash, or as a
4188: # colon-separated list of (in order) description,
4189: # institutional code, and course owner.
4190: # selfenrollonly - filter by courses allowing self-enrollment
4191: # now or in the future (selfenrollonly = 1).
4192: # catfilter - filter by course category, assigned to a course
4193: # using manually defined categories (i.e., not
4194: # self-cataloging based on on institutional code).
4195: # showhidden - include course in results even if course
4196: # was set to be excluded from course catalog (DC only).
4197: # caller - if set to 'coursecatalog', courses set to be hidden
4198: # from course catalog will be excluded from results (unless
4199: # overridden by "showhidden".
4200: # cloner - escaped username:domain of course cloner (if picking course to
4201: # clone).
4202: # cc_clone_list - escaped comma separated list of courses for which
4203: # course cloner has active CC role (and so can clone
4204: # automatically).
4205: # cloneonly - filter by courses for which cloner has rights to clone.
4206: # createdbefore - include courses for which creation date preceeded this date.
4207: # createdafter - include courses for which creation date followed this date.
4208: # creationcontext - include courses created in specified context
4209: #
4210: # domcloner - flag to indicate if user can create CCs in course's domain.
4211: # If so, ability to clone course is automatic.
4212: # hasuniquecode - filter by courses for which a six character unique code has
4213: # been set.
4214: #
4215: # $client - The socket open on the client.
4216: # Returns:
4217: # 1 - Continue processing.
4218: # Side Effects:
4219: # a reply is written to $client.
4220: sub dump_course_id_handler {
4221: my ($cmd, $tail, $client) = @_;
4222:
4223: my $res = LONCAPA::Lond::dump_course_id_handler($tail);
4224: if ($res =~ /^error:/) {
4225: Failure($client, \$res, "$cmd:$tail");
4226: } else {
4227: Reply($client, \$res, "$cmd:$tail");
4228: }
4229:
4230: return 1;
4231:
4232: #TODO remove
4233: my $userinput = "$cmd:$tail";
4234:
4235: my ($udom,$since,$description,$instcodefilter,$ownerfilter,$coursefilter,
4236: $typefilter,$regexp_ok,$rtn_as_hash,$selfenrollonly,$catfilter,$showhidden,
4237: $caller,$cloner,$cc_clone_list,$cloneonly,$createdbefore,$createdafter,
4238: $creationcontext,$domcloner,$hasuniquecode) =split(/:/,$tail);
4239: my $now = time;
4240: my ($cloneruname,$clonerudom,%cc_clone);
4241: if (defined($description)) {
4242: $description=&unescape($description);
4243: } else {
4244: $description='.';
4245: }
4246: if (defined($instcodefilter)) {
4247: $instcodefilter=&unescape($instcodefilter);
4248: } else {
4249: $instcodefilter='.';
4250: }
4251: my ($ownerunamefilter,$ownerdomfilter);
4252: if (defined($ownerfilter)) {
4253: $ownerfilter=&unescape($ownerfilter);
4254: if ($ownerfilter ne '.' && defined($ownerfilter)) {
4255: if ($ownerfilter =~ /^([^:]*):([^:]*)$/) {
4256: $ownerunamefilter = $1;
4257: $ownerdomfilter = $2;
4258: } else {
4259: $ownerunamefilter = $ownerfilter;
4260: $ownerdomfilter = '';
4261: }
4262: }
4263: } else {
4264: $ownerfilter='.';
4265: }
4266:
4267: if (defined($coursefilter)) {
4268: $coursefilter=&unescape($coursefilter);
4269: } else {
4270: $coursefilter='.';
4271: }
4272: if (defined($typefilter)) {
4273: $typefilter=&unescape($typefilter);
4274: } else {
4275: $typefilter='.';
4276: }
4277: if (defined($regexp_ok)) {
4278: $regexp_ok=&unescape($regexp_ok);
4279: }
4280: if (defined($catfilter)) {
4281: $catfilter=&unescape($catfilter);
4282: }
4283: if (defined($cloner)) {
4284: $cloner = &unescape($cloner);
4285: ($cloneruname,$clonerudom) = ($cloner =~ /^($LONCAPA::match_username):($LONCAPA::match_domain)$/);
4286: }
4287: if (defined($cc_clone_list)) {
4288: $cc_clone_list = &unescape($cc_clone_list);
4289: my @cc_cloners = split('&',$cc_clone_list);
4290: foreach my $cid (@cc_cloners) {
4291: my ($clonedom,$clonenum) = split(':',$cid);
4292: next if ($clonedom ne $udom);
4293: $cc_clone{$clonedom.'_'.$clonenum} = 1;
4294: }
4295: }
4296: if ($createdbefore ne '') {
4297: $createdbefore = &unescape($createdbefore);
4298: } else {
4299: $createdbefore = 0;
4300: }
4301: if ($createdafter ne '') {
4302: $createdafter = &unescape($createdafter);
4303: } else {
4304: $createdafter = 0;
4305: }
4306: if ($creationcontext ne '') {
4307: $creationcontext = &unescape($creationcontext);
4308: } else {
4309: $creationcontext = '.';
4310: }
4311: unless ($hasuniquecode) {
4312: $hasuniquecode = '.';
4313: }
4314: my $unpack = 1;
4315: if ($description eq '.' && $instcodefilter eq '.' && $ownerfilter eq '.' &&
4316: $typefilter eq '.') {
4317: $unpack = 0;
4318: }
4319: if (!defined($since)) { $since=0; }
4320: my $qresult='';
4321: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
4322: if ($hashref) {
4323: while (my ($key,$value) = each(%$hashref)) {
4324: my ($unesc_key,$lasttime_key,$lasttime,$is_hash,%val,
4325: %unesc_val,$selfenroll_end,$selfenroll_types,$created,
4326: $context);
4327: $unesc_key = &unescape($key);
4328: if ($unesc_key =~ /^lasttime:/) {
4329: next;
4330: } else {
4331: $lasttime_key = &escape('lasttime:'.$unesc_key);
4332: }
4333: if ($hashref->{$lasttime_key} ne '') {
4334: $lasttime = $hashref->{$lasttime_key};
4335: next if ($lasttime<$since);
4336: }
4337: my ($canclone,$valchange);
4338: my $items = &Apache::lonnet::thaw_unescape($value);
4339: if (ref($items) eq 'HASH') {
4340: if ($hashref->{$lasttime_key} eq '') {
4341: next if ($since > 1);
4342: }
4343: $is_hash = 1;
4344: if ($domcloner) {
4345: $canclone = 1;
4346: } elsif (defined($clonerudom)) {
4347: if ($items->{'cloners'}) {
4348: my @cloneable = split(',',$items->{'cloners'});
4349: if (@cloneable) {
4350: if (grep(/^\*$/,@cloneable)) {
4351: $canclone = 1;
4352: } elsif (grep(/^\*:\Q$clonerudom\E$/,@cloneable)) {
4353: $canclone = 1;
4354: } elsif (grep(/^\Q$cloneruname\E:\Q$clonerudom\E$/,@cloneable)) {
4355: $canclone = 1;
4356: }
4357: }
4358: unless ($canclone) {
4359: if ($cloneruname ne '' && $clonerudom ne '') {
4360: if ($cc_clone{$unesc_key}) {
4361: $canclone = 1;
4362: $items->{'cloners'} .= ','.$cloneruname.':'.
4363: $clonerudom;
4364: $valchange = 1;
4365: }
4366: }
4367: }
4368: } elsif (defined($cloneruname)) {
4369: if ($cc_clone{$unesc_key}) {
4370: $canclone = 1;
4371: $items->{'cloners'} = $cloneruname.':'.$clonerudom;
4372: $valchange = 1;
4373: }
4374: unless ($canclone) {
4375: if ($items->{'owner'} =~ /:/) {
4376: if ($items->{'owner'} eq $cloner) {
4377: $canclone = 1;
4378: }
4379: } elsif ($cloner eq $items->{'owner'}.':'.$udom) {
4380: $canclone = 1;
4381: }
4382: if ($canclone) {
4383: $items->{'cloners'} = $cloneruname.':'.$clonerudom;
4384: $valchange = 1;
4385: }
4386: }
4387: }
4388: }
4389: if ($unpack || !$rtn_as_hash) {
4390: $unesc_val{'descr'} = $items->{'description'};
4391: $unesc_val{'inst_code'} = $items->{'inst_code'};
4392: $unesc_val{'owner'} = $items->{'owner'};
4393: $unesc_val{'type'} = $items->{'type'};
4394: $unesc_val{'cloners'} = $items->{'cloners'};
4395: $unesc_val{'created'} = $items->{'created'};
4396: $unesc_val{'context'} = $items->{'context'};
4397: }
4398: $selfenroll_types = $items->{'selfenroll_types'};
4399: $selfenroll_end = $items->{'selfenroll_end_date'};
4400: $created = $items->{'created'};
4401: $context = $items->{'context'};
4402: if ($hasuniquecode ne '.') {
4403: next unless ($items->{'uniquecode'});
4404: }
4405: if ($selfenrollonly) {
4406: next if (!$selfenroll_types);
4407: if (($selfenroll_end > 0) && ($selfenroll_end <= $now)) {
4408: next;
4409: }
4410: }
4411: if ($creationcontext ne '.') {
4412: next if (($context ne '') && ($context ne $creationcontext));
4413: }
4414: if ($createdbefore > 0) {
4415: next if (($created eq '') || ($created > $createdbefore));
4416: }
4417: if ($createdafter > 0) {
4418: next if (($created eq '') || ($created <= $createdafter));
4419: }
4420: if ($catfilter ne '') {
4421: next if ($items->{'categories'} eq '');
4422: my @categories = split('&',$items->{'categories'});
4423: next if (@categories == 0);
4424: my @subcats = split('&',$catfilter);
4425: my $matchcat = 0;
4426: foreach my $cat (@categories) {
4427: if (grep(/^\Q$cat\E$/,@subcats)) {
4428: $matchcat = 1;
4429: last;
4430: }
4431: }
4432: next if (!$matchcat);
4433: }
4434: if ($caller eq 'coursecatalog') {
4435: if ($items->{'hidefromcat'} eq 'yes') {
4436: next if !$showhidden;
4437: }
4438: }
4439: } else {
4440: next if ($catfilter ne '');
4441: next if ($selfenrollonly);
4442: next if ($createdbefore || $createdafter);
4443: next if ($creationcontext ne '.');
4444: if ((defined($clonerudom)) && (defined($cloneruname))) {
4445: if ($cc_clone{$unesc_key}) {
4446: $canclone = 1;
4447: $val{'cloners'} = &escape($cloneruname.':'.$clonerudom);
4448: }
4449: }
4450: $is_hash = 0;
4451: my @courseitems = split(/:/,$value);
4452: $lasttime = pop(@courseitems);
4453: if ($hashref->{$lasttime_key} eq '') {
4454: next if ($lasttime<$since);
4455: }
4456: ($val{'descr'},$val{'inst_code'},$val{'owner'},$val{'type'}) = @courseitems;
4457: }
4458: if ($cloneonly) {
4459: next unless ($canclone);
4460: }
4461: my $match = 1;
4462: if ($description ne '.') {
4463: if (!$is_hash) {
4464: $unesc_val{'descr'} = &unescape($val{'descr'});
4465: }
4466: if (eval{$unesc_val{'descr'} !~ /\Q$description\E/i}) {
4467: $match = 0;
4468: }
4469: }
4470: if ($instcodefilter ne '.') {
4471: if (!$is_hash) {
4472: $unesc_val{'inst_code'} = &unescape($val{'inst_code'});
4473: }
4474: if ($regexp_ok == 1) {
4475: if (eval{$unesc_val{'inst_code'} !~ /$instcodefilter/}) {
4476: $match = 0;
4477: }
4478: } elsif ($regexp_ok == -1) {
4479: if (eval{$unesc_val{'inst_code'} =~ /$instcodefilter/}) {
4480: $match = 0;
4481: }
4482: } else {
4483: if (eval{$unesc_val{'inst_code'} !~ /\Q$instcodefilter\E/i}) {
4484: $match = 0;
4485: }
4486: }
4487: }
4488: if ($ownerfilter ne '.') {
4489: if (!$is_hash) {
4490: $unesc_val{'owner'} = &unescape($val{'owner'});
4491: }
4492: if (($ownerunamefilter ne '') && ($ownerdomfilter ne '')) {
4493: if ($unesc_val{'owner'} =~ /:/) {
4494: if (eval{$unesc_val{'owner'} !~
4495: /\Q$ownerunamefilter\E:\Q$ownerdomfilter\E$/i}) {
4496: $match = 0;
4497: }
4498: } else {
4499: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) {
4500: $match = 0;
4501: }
4502: }
4503: } elsif ($ownerunamefilter ne '') {
4504: if ($unesc_val{'owner'} =~ /:/) {
4505: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E:[^:]+$/i}) {
4506: $match = 0;
4507: }
4508: } else {
4509: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) {
4510: $match = 0;
4511: }
4512: }
4513: } elsif ($ownerdomfilter ne '') {
4514: if ($unesc_val{'owner'} =~ /:/) {
4515: if (eval{$unesc_val{'owner'} !~ /^[^:]+:\Q$ownerdomfilter\E/}) {
4516: $match = 0;
4517: }
4518: } else {
4519: if ($ownerdomfilter ne $udom) {
4520: $match = 0;
4521: }
4522: }
4523: }
4524: }
4525: if ($coursefilter ne '.') {
4526: if (eval{$unesc_key !~ /^$udom(_)\Q$coursefilter\E$/}) {
4527: $match = 0;
4528: }
4529: }
4530: if ($typefilter ne '.') {
4531: if (!$is_hash) {
4532: $unesc_val{'type'} = &unescape($val{'type'});
4533: }
4534: if ($unesc_val{'type'} eq '') {
4535: if ($typefilter ne 'Course') {
4536: $match = 0;
4537: }
4538: } else {
4539: if (eval{$unesc_val{'type'} !~ /^\Q$typefilter\E$/}) {
4540: $match = 0;
4541: }
4542: }
4543: }
4544: if ($match == 1) {
4545: if ($rtn_as_hash) {
4546: if ($is_hash) {
4547: if ($valchange) {
4548: my $newvalue = &Apache::lonnet::freeze_escape($items);
4549: $qresult.=$key.'='.$newvalue.'&';
4550: } else {
4551: $qresult.=$key.'='.$value.'&';
4552: }
4553: } else {
4554: my %rtnhash = ( 'description' => &unescape($val{'descr'}),
4555: 'inst_code' => &unescape($val{'inst_code'}),
4556: 'owner' => &unescape($val{'owner'}),
4557: 'type' => &unescape($val{'type'}),
4558: 'cloners' => &unescape($val{'cloners'}),
4559: );
4560: my $items = &Apache::lonnet::freeze_escape(\%rtnhash);
4561: $qresult.=$key.'='.$items.'&';
4562: }
4563: } else {
4564: if ($is_hash) {
4565: $qresult .= $key.'='.&escape($unesc_val{'descr'}).':'.
4566: &escape($unesc_val{'inst_code'}).':'.
4567: &escape($unesc_val{'owner'}).'&';
4568: } else {
4569: $qresult .= $key.'='.$val{'descr'}.':'.$val{'inst_code'}.
4570: ':'.$val{'owner'}.'&';
4571: }
4572: }
4573: }
4574: }
4575: if (&untie_domain_hash($hashref)) {
4576: chop($qresult);
4577: &Reply($client, \$qresult, $userinput);
4578: } else {
4579: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4580: "while attempting courseiddump\n", $userinput);
4581: }
4582: } else {
4583: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4584: "while attempting courseiddump\n", $userinput);
4585: }
4586: return 1;
4587: }
4588: ®ister_handler("courseiddump", \&dump_course_id_handler, 0, 1, 0);
4589:
4590: sub course_lastaccess_handler {
4591: my ($cmd, $tail, $client) = @_;
4592: my $userinput = "$cmd:$tail";
4593: my ($cdom,$cnum) = split(':',$tail);
4594: my (%lastaccess,$qresult);
4595: my $hashref = &tie_domain_hash($cdom, "nohist_courseids", &GDBM_WRCREAT());
4596: if ($hashref) {
4597: while (my ($key,$value) = each(%$hashref)) {
4598: my ($unesc_key,$lasttime);
4599: $unesc_key = &unescape($key);
4600: if ($cnum) {
4601: next unless ($unesc_key =~ /\Q$cdom\E_\Q$cnum\E$/);
4602: }
4603: if ($unesc_key =~ /^lasttime:($LONCAPA::match_domain\_$LONCAPA::match_courseid)/) {
4604: $lastaccess{$1} = $value;
4605: } else {
4606: my $items = &Apache::lonnet::thaw_unescape($value);
4607: if (ref($items) eq 'HASH') {
4608: unless ($lastaccess{$unesc_key}) {
4609: $lastaccess{$unesc_key} = '';
4610: }
4611: } else {
4612: my @courseitems = split(':',$value);
4613: $lastaccess{$unesc_key} = pop(@courseitems);
4614: }
4615: }
4616: }
4617: foreach my $cid (sort(keys(%lastaccess))) {
4618: $qresult.=&escape($cid).'='.$lastaccess{$cid}.'&';
4619: }
4620: if (&untie_domain_hash($hashref)) {
4621: if ($qresult) {
4622: chop($qresult);
4623: }
4624: &Reply($client, \$qresult, $userinput);
4625: } else {
4626: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4627: "while attempting lastacourseaccess\n", $userinput);
4628: }
4629: } else {
4630: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4631: "while attempting lastcourseaccess\n", $userinput);
4632: }
4633: return 1;
4634: }
4635: ®ister_handler("courselastaccess",\&course_lastaccess_handler, 0, 1, 0);
4636:
4637: #
4638: # Puts an unencrypted entry in a namespace db file at the domain level
4639: #
4640: # Parameters:
4641: # $cmd - The command that got us here.
4642: # $tail - Tail of the command (remaining parameters).
4643: # $client - File descriptor connected to client.
4644: # Returns
4645: # 0 - Requested to exit, caller should shut down.
4646: # 1 - Continue processing.
4647: # Side effects:
4648: # reply is written to $client.
4649: #
4650: sub put_domain_handler {
4651: my ($cmd,$tail,$client) = @_;
4652:
4653: my $userinput = "$cmd:$tail";
4654:
4655: my ($udom,$namespace,$what) =split(/:/,$tail,3);
4656: chomp($what);
4657: my @pairs=split(/\&/,$what);
4658: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_WRCREAT(),
4659: "P", $what);
4660: if ($hashref) {
4661: foreach my $pair (@pairs) {
4662: my ($key,$value)=split(/=/,$pair);
4663: $hashref->{$key}=$value;
4664: }
4665: if (&untie_domain_hash($hashref)) {
4666: &Reply($client, "ok\n", $userinput);
4667: } else {
4668: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4669: "while attempting putdom\n", $userinput);
4670: }
4671: } else {
4672: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4673: "while attempting putdom\n", $userinput);
4674: }
4675:
4676: return 1;
4677: }
4678: ®ister_handler("putdom", \&put_domain_handler, 0, 1, 0);
4679:
4680: # Updates one or more entries in clickers.db file at the domain level
4681: #
4682: # Parameters:
4683: # $cmd - The command that got us here.
4684: # $tail - Tail of the command (remaining parameters).
4685: # In this case a colon separated list containing:
4686: # (a) the domain for which we are updating the entries,
4687: # (b) the action required -- add or del -- and
4688: # (c) a &-separated list of entries to add or delete.
4689: # $client - File descriptor connected to client.
4690: # Returns
4691: # 1 - Continue processing.
4692: # 0 - Requested to exit, caller should shut down.
4693: # Side effects:
4694: # reply is written to $client.
4695: #
4696:
4697:
4698: sub update_clickers {
4699: my ($cmd, $tail, $client) = @_;
4700:
4701: my $userinput = "$cmd:$tail";
4702: my ($udom,$action,$what) =split(/:/,$tail,3);
4703: chomp($what);
4704:
4705: my $hashref = &tie_domain_hash($udom, "clickers", &GDBM_WRCREAT(),
4706: "U","$action:$what");
4707:
4708: if (!$hashref) {
4709: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4710: "while attempting updateclickers\n", $userinput);
4711: return 1;
4712: }
4713:
4714: my @pairs=split(/\&/,$what);
4715: foreach my $pair (@pairs) {
4716: my ($key,$value)=split(/=/,$pair);
4717: if ($action eq 'add') {
4718: if (exists($hashref->{$key})) {
4719: my @newvals = split(/,/,&unescape($value));
4720: my @currvals = split(/,/,&unescape($hashref->{$key}));
4721: my @merged = sort(keys(%{{map { $_ => 1 } (@newvals,@currvals)}}));
4722: $hashref->{$key}=&escape(join(',',@merged));
4723: } else {
4724: $hashref->{$key}=$value;
4725: }
4726: } elsif ($action eq 'del') {
4727: if (exists($hashref->{$key})) {
4728: my %current;
4729: map { $current{$_} = 1; } split(/,/,&unescape($hashref->{$key}));
4730: map { delete($current{$_}); } split(/,/,&unescape($value));
4731: if (keys(%current)) {
4732: $hashref->{$key}=&escape(join(',',sort(keys(%current))));
4733: } else {
4734: delete($hashref->{$key});
4735: }
4736: }
4737: }
4738: }
4739: if (&untie_user_hash($hashref)) {
4740: &Reply( $client, "ok\n", $userinput);
4741: } else {
4742: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
4743: "while attempting put\n",
4744: $userinput);
4745: }
4746: return 1;
4747: }
4748: ®ister_handler("updateclickers", \&update_clickers, 0, 1, 0);
4749:
4750:
4751: # Deletes one or more entries in a namespace db file at the domain level
4752: #
4753: # Parameters:
4754: # $cmd - The command that got us here.
4755: # $tail - Tail of the command (remaining parameters).
4756: # In this case a colon separated list containing:
4757: # (a) the domain for which we are deleting the entries,
4758: # (b) &-separated list of keys to delete.
4759: # $client - File descriptor connected to client.
4760: # Returns
4761: # 1 - Continue processing.
4762: # 0 - Requested to exit, caller should shut down.
4763: # Side effects:
4764: # reply is written to $client.
4765: #
4766:
4767: sub del_domain_handler {
4768: my ($cmd,$tail,$client) = @_;
4769:
4770: my $userinput = "$cmd:$tail";
4771:
4772: my ($udom,$namespace,$what)=split(/:/,$tail,3);
4773: chomp($what);
4774: my $hashref = &tie_domain_hash($udom,$namespace,&GDBM_WRCREAT(),
4775: "D", $what);
4776: if ($hashref) {
4777: my @keys=split(/\&/,$what);
4778: foreach my $key (@keys) {
4779: delete($hashref->{$key});
4780: }
4781: if (&untie_user_hash($hashref)) {
4782: &Reply($client, "ok\n", $userinput);
4783: } else {
4784: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4785: "while attempting deldom\n", $userinput);
4786: }
4787: } else {
4788: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4789: "while attempting deldom\n", $userinput);
4790: }
4791: return 1;
4792: }
4793: ®ister_handler("deldom", \&del_domain_handler, 0, 1, 0);
4794:
4795:
4796: # Unencrypted get from the namespace database file at the domain level.
4797: # This function retrieves a keyed item from a specific named database in the
4798: # domain directory.
4799: #
4800: # Parameters:
4801: # $cmd - Command request keyword (get).
4802: # $tail - Tail of the command. This is a colon separated list
4803: # consisting of the domain and the 'namespace'
4804: # which selects the gdbm file to do the lookup in,
4805: # & separated list of keys to lookup. Note that
4806: # the values are returned as an & separated list too.
4807: # $client - File descriptor open on the client.
4808: # Returns:
4809: # 1 - Continue processing.
4810: # 0 - Exit.
4811: # Side effects:
4812: # reply is written to $client.
4813: #
4814:
4815: sub get_domain_handler {
4816: my ($cmd, $tail, $client) = @_;
4817:
4818:
4819: my $userinput = "$client:$tail";
4820:
4821: my ($udom,$namespace,$what)=split(/:/,$tail,3);
4822: chomp($what);
4823: my @queries=split(/\&/,$what);
4824: my $qresult='';
4825: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_READER());
4826: if ($hashref) {
4827: for (my $i=0;$i<=$#queries;$i++) {
4828: $qresult.="$hashref->{$queries[$i]}&";
4829: }
4830: if (&untie_domain_hash($hashref)) {
4831: $qresult=~s/\&$//;
4832: &Reply($client, \$qresult, $userinput);
4833: } else {
4834: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
4835: "while attempting getdom\n",$userinput);
4836: }
4837: } else {
4838: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4839: "while attempting getdom\n",$userinput);
4840: }
4841:
4842: return 1;
4843: }
4844: ®ister_handler("getdom", \&get_domain_handler, 0, 1, 0);
4845:
4846: #
4847: # Puts an id to a domains id database.
4848: #
4849: # Parameters:
4850: # $cmd - The command that triggered us.
4851: # $tail - Remainder of the request other than the command. This is a
4852: # colon separated list containing:
4853: # $domain - The domain for which we are writing the id.
4854: # $pairs - The id info to write... this is and & separated list
4855: # of keyword=value.
4856: # $client - Socket open on the client.
4857: # Returns:
4858: # 1 - Continue processing.
4859: # Side effects:
4860: # reply is written to $client.
4861: #
4862: sub put_id_handler {
4863: my ($cmd,$tail,$client) = @_;
4864:
4865:
4866: my $userinput = "$cmd:$tail";
4867:
4868: my ($udom,$what)=split(/:/,$tail);
4869: chomp($what);
4870: my @pairs=split(/\&/,$what);
4871: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
4872: "P", $what);
4873: if ($hashref) {
4874: foreach my $pair (@pairs) {
4875: my ($key,$value)=split(/=/,$pair);
4876: $hashref->{$key}=$value;
4877: }
4878: if (&untie_domain_hash($hashref)) {
4879: &Reply($client, "ok\n", $userinput);
4880: } else {
4881: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4882: "while attempting idput\n", $userinput);
4883: }
4884: } else {
4885: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4886: "while attempting idput\n", $userinput);
4887: }
4888:
4889: return 1;
4890: }
4891: ®ister_handler("idput", \&put_id_handler, 0, 1, 0);
4892:
4893: #
4894: # Retrieves a set of id values from the id database.
4895: # Returns an & separated list of results, one for each requested id to the
4896: # client.
4897: #
4898: # Parameters:
4899: # $cmd - Command keyword that caused us to be dispatched.
4900: # $tail - Tail of the command. Consists of a colon separated:
4901: # domain - the domain whose id table we dump
4902: # ids Consists of an & separated list of
4903: # id keywords whose values will be fetched.
4904: # nonexisting keywords will have an empty value.
4905: # $client - Socket open on the client.
4906: #
4907: # Returns:
4908: # 1 - indicating processing should continue.
4909: # Side effects:
4910: # An & separated list of results is written to $client.
4911: #
4912: sub get_id_handler {
4913: my ($cmd, $tail, $client) = @_;
4914:
4915:
4916: my $userinput = "$client:$tail";
4917:
4918: my ($udom,$what)=split(/:/,$tail);
4919: chomp($what);
4920: my @queries=split(/\&/,$what);
4921: my $qresult='';
4922: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_READER());
4923: if ($hashref) {
4924: for (my $i=0;$i<=$#queries;$i++) {
4925: $qresult.="$hashref->{$queries[$i]}&";
4926: }
4927: if (&untie_domain_hash($hashref)) {
4928: $qresult=~s/\&$//;
4929: &Reply($client, \$qresult, $userinput);
4930: } else {
4931: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
4932: "while attempting idget\n",$userinput);
4933: }
4934: } else {
4935: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4936: "while attempting idget\n",$userinput);
4937: }
4938:
4939: return 1;
4940: }
4941: ®ister_handler("idget", \&get_id_handler, 0, 1, 0);
4942:
4943: # Deletes one or more ids in a domain's id database.
4944: #
4945: # Parameters:
4946: # $cmd - Command keyword (iddel).
4947: # $tail - Command tail. In this case a colon
4948: # separated list containing:
4949: # The domain for which we are deleting the id(s).
4950: # &-separated list of id(s) to delete.
4951: # $client - File open on client socket.
4952: # Returns:
4953: # 1 - Continue processing
4954: # 0 - Exit server.
4955: #
4956: #
4957:
4958: sub del_id_handler {
4959: my ($cmd,$tail,$client) = @_;
4960:
4961: my $userinput = "$cmd:$tail";
4962:
4963: my ($udom,$what)=split(/:/,$tail);
4964: chomp($what);
4965: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
4966: "D", $what);
4967: if ($hashref) {
4968: my @keys=split(/\&/,$what);
4969: foreach my $key (@keys) {
4970: delete($hashref->{$key});
4971: }
4972: if (&untie_user_hash($hashref)) {
4973: &Reply($client, "ok\n", $userinput);
4974: } else {
4975: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4976: "while attempting iddel\n", $userinput);
4977: }
4978: } else {
4979: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4980: "while attempting iddel\n", $userinput);
4981: }
4982: return 1;
4983: }
4984: ®ister_handler("iddel", \&del_id_handler, 0, 1, 0);
4985:
4986: #
4987: # Puts broadcast e-mail sent by Domain Coordinator in nohist_dcmail database
4988: #
4989: # Parameters
4990: # $cmd - Command keyword that caused us to be dispatched.
4991: # $tail - Tail of the command. Consists of a colon separated:
4992: # domain - the domain whose dcmail we are recording
4993: # email Consists of key=value pair
4994: # where key is unique msgid
4995: # and value is message (in XML)
4996: # $client - Socket open on the client.
4997: #
4998: # Returns:
4999: # 1 - indicating processing should continue.
5000: # Side effects
5001: # reply is written to $client.
5002: #
5003: sub put_dcmail_handler {
5004: my ($cmd,$tail,$client) = @_;
5005: my $userinput = "$cmd:$tail";
5006:
5007:
5008: my ($udom,$what)=split(/:/,$tail);
5009: chomp($what);
5010: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
5011: if ($hashref) {
5012: my ($key,$value)=split(/=/,$what);
5013: $hashref->{$key}=$value;
5014: }
5015: if (&untie_domain_hash($hashref)) {
5016: &Reply($client, "ok\n", $userinput);
5017: } else {
5018: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
5019: "while attempting dcmailput\n", $userinput);
5020: }
5021: return 1;
5022: }
5023: ®ister_handler("dcmailput", \&put_dcmail_handler, 0, 1, 0);
5024:
5025: #
5026: # Retrieves broadcast e-mail from nohist_dcmail database
5027: # Returns to client an & separated list of key=value pairs,
5028: # where key is msgid and value is message information.
5029: #
5030: # Parameters
5031: # $cmd - Command keyword that caused us to be dispatched.
5032: # $tail - Tail of the command. Consists of a colon separated:
5033: # domain - the domain whose dcmail table we dump
5034: # startfilter - beginning of time window
5035: # endfilter - end of time window
5036: # sendersfilter - & separated list of username:domain
5037: # for senders to search for.
5038: # $client - Socket open on the client.
5039: #
5040: # Returns:
5041: # 1 - indicating processing should continue.
5042: # Side effects
5043: # reply (& separated list of msgid=messageinfo pairs) is
5044: # written to $client.
5045: #
5046: sub dump_dcmail_handler {
5047: my ($cmd, $tail, $client) = @_;
5048:
5049: my $userinput = "$cmd:$tail";
5050: my ($udom,$startfilter,$endfilter,$sendersfilter) = split(/:/,$tail);
5051: chomp($sendersfilter);
5052: my @senders = ();
5053: if (defined($startfilter)) {
5054: $startfilter=&unescape($startfilter);
5055: } else {
5056: $startfilter='.';
5057: }
5058: if (defined($endfilter)) {
5059: $endfilter=&unescape($endfilter);
5060: } else {
5061: $endfilter='.';
5062: }
5063: if (defined($sendersfilter)) {
5064: $sendersfilter=&unescape($sendersfilter);
5065: @senders = map { &unescape($_) } split(/\&/,$sendersfilter);
5066: }
5067:
5068: my $qresult='';
5069: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
5070: if ($hashref) {
5071: while (my ($key,$value) = each(%$hashref)) {
5072: my $match = 1;
5073: my ($timestamp,$subj,$uname,$udom) =
5074: split(/:/,&unescape(&unescape($key)),5); # yes, twice really
5075: $subj = &unescape($subj);
5076: unless ($startfilter eq '.' || !defined($startfilter)) {
5077: if ($timestamp < $startfilter) {
5078: $match = 0;
5079: }
5080: }
5081: unless ($endfilter eq '.' || !defined($endfilter)) {
5082: if ($timestamp > $endfilter) {
5083: $match = 0;
5084: }
5085: }
5086: unless (@senders < 1) {
5087: unless (grep/^$uname:$udom$/,@senders) {
5088: $match = 0;
5089: }
5090: }
5091: if ($match == 1) {
5092: $qresult.=$key.'='.$value.'&';
5093: }
5094: }
5095: if (&untie_domain_hash($hashref)) {
5096: chop($qresult);
5097: &Reply($client, \$qresult, $userinput);
5098: } else {
5099: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
5100: "while attempting dcmaildump\n", $userinput);
5101: }
5102: } else {
5103: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
5104: "while attempting dcmaildump\n", $userinput);
5105: }
5106: return 1;
5107: }
5108:
5109: ®ister_handler("dcmaildump", \&dump_dcmail_handler, 0, 1, 0);
5110:
5111: #
5112: # Puts domain roles in nohist_domainroles database
5113: #
5114: # Parameters
5115: # $cmd - Command keyword that caused us to be dispatched.
5116: # $tail - Tail of the command. Consists of a colon separated:
5117: # domain - the domain whose roles we are recording
5118: # role - Consists of key=value pair
5119: # where key is unique role
5120: # and value is start/end date information
5121: # $client - Socket open on the client.
5122: #
5123: # Returns:
5124: # 1 - indicating processing should continue.
5125: # Side effects
5126: # reply is written to $client.
5127: #
5128:
5129: sub put_domainroles_handler {
5130: my ($cmd,$tail,$client) = @_;
5131:
5132: my $userinput = "$cmd:$tail";
5133: my ($udom,$what)=split(/:/,$tail);
5134: chomp($what);
5135: my @pairs=split(/\&/,$what);
5136: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
5137: if ($hashref) {
5138: foreach my $pair (@pairs) {
5139: my ($key,$value)=split(/=/,$pair);
5140: $hashref->{$key}=$value;
5141: }
5142: if (&untie_domain_hash($hashref)) {
5143: &Reply($client, "ok\n", $userinput);
5144: } else {
5145: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
5146: "while attempting domroleput\n", $userinput);
5147: }
5148: } else {
5149: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
5150: "while attempting domroleput\n", $userinput);
5151: }
5152:
5153: return 1;
5154: }
5155:
5156: ®ister_handler("domroleput", \&put_domainroles_handler, 0, 1, 0);
5157:
5158: #
5159: # Retrieves domain roles from nohist_domainroles database
5160: # Returns to client an & separated list of key=value pairs,
5161: # where key is role and value is start and end date information.
5162: #
5163: # Parameters
5164: # $cmd - Command keyword that caused us to be dispatched.
5165: # $tail - Tail of the command. Consists of a colon separated:
5166: # domain - the domain whose domain roles table we dump
5167: # $client - Socket open on the client.
5168: #
5169: # Returns:
5170: # 1 - indicating processing should continue.
5171: # Side effects
5172: # reply (& separated list of role=start/end info pairs) is
5173: # written to $client.
5174: #
5175: sub dump_domainroles_handler {
5176: my ($cmd, $tail, $client) = @_;
5177:
5178: my $userinput = "$cmd:$tail";
5179: my ($udom,$startfilter,$endfilter,$rolesfilter) = split(/:/,$tail);
5180: chomp($rolesfilter);
5181: my @roles = ();
5182: if (defined($startfilter)) {
5183: $startfilter=&unescape($startfilter);
5184: } else {
5185: $startfilter='.';
5186: }
5187: if (defined($endfilter)) {
5188: $endfilter=&unescape($endfilter);
5189: } else {
5190: $endfilter='.';
5191: }
5192: if (defined($rolesfilter)) {
5193: $rolesfilter=&unescape($rolesfilter);
5194: @roles = split(/\&/,$rolesfilter);
5195: }
5196:
5197: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
5198: if ($hashref) {
5199: my $qresult = '';
5200: while (my ($key,$value) = each(%$hashref)) {
5201: my $match = 1;
5202: my ($end,$start) = split(/:/,&unescape($value));
5203: my ($trole,$uname,$udom,$runame,$rudom,$rsec) = split(/:/,&unescape($key));
5204: unless (@roles < 1) {
5205: unless (grep/^\Q$trole\E$/,@roles) {
5206: $match = 0;
5207: next;
5208: }
5209: }
5210: unless ($startfilter eq '.' || !defined($startfilter)) {
5211: if ((defined($start)) && ($start >= $startfilter)) {
5212: $match = 0;
5213: next;
5214: }
5215: }
5216: unless ($endfilter eq '.' || !defined($endfilter)) {
5217: if ((defined($end)) && (($end > 0) && ($end <= $endfilter))) {
5218: $match = 0;
5219: next;
5220: }
5221: }
5222: if ($match == 1) {
5223: $qresult.=$key.'='.$value.'&';
5224: }
5225: }
5226: if (&untie_domain_hash($hashref)) {
5227: chop($qresult);
5228: &Reply($client, \$qresult, $userinput);
5229: } else {
5230: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
5231: "while attempting domrolesdump\n", $userinput);
5232: }
5233: } else {
5234: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
5235: "while attempting domrolesdump\n", $userinput);
5236: }
5237: return 1;
5238: }
5239:
5240: ®ister_handler("domrolesdump", \&dump_domainroles_handler, 0, 1, 0);
5241:
5242:
5243: # Process the tmpput command I'm not sure what this does.. Seems to
5244: # create a file in the lonDaemons/tmp directory of the form $id.tmp
5245: # where Id is the client's ip concatenated with a sequence number.
5246: # The file will contain some value that is passed in. Is this e.g.
5247: # a login token?
5248: #
5249: # Parameters:
5250: # $cmd - The command that got us dispatched.
5251: # $tail - The remainder of the request following $cmd:
5252: # In this case this will be the contents of the file.
5253: # $client - Socket connected to the client.
5254: # Returns:
5255: # 1 indicating processing can continue.
5256: # Side effects:
5257: # A file is created in the local filesystem.
5258: # A reply is sent to the client.
5259: sub tmp_put_handler {
5260: my ($cmd, $what, $client) = @_;
5261:
5262: my $userinput = "$cmd:$what"; # Reconstruct for logging.
5263:
5264: my ($record,$context) = split(/:/,$what);
5265: if ($context ne '') {
5266: chomp($context);
5267: $context = &unescape($context);
5268: }
5269: my ($id,$store);
5270: $tmpsnum++;
5271: if (($context eq 'resetpw') || ($context eq 'createaccount')) {
5272: $id = &md5_hex(&md5_hex(time.{}.rand().$$));
5273: } else {
5274: $id = $$.'_'.$clientip.'_'.$tmpsnum;
5275: }
5276: $id=~s/\W/\_/g;
5277: $record=~s/\n//g;
5278: my $execdir=$perlvar{'lonDaemons'};
5279: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
5280: print $store $record;
5281: close $store;
5282: &Reply($client, \$id, $userinput);
5283: } else {
5284: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
5285: "while attempting tmpput\n", $userinput);
5286: }
5287: return 1;
5288:
5289: }
5290: ®ister_handler("tmpput", \&tmp_put_handler, 0, 1, 0);
5291:
5292: # Processes the tmpget command. This command returns the contents
5293: # of a temporary resource file(?) created via tmpput.
5294: #
5295: # Paramters:
5296: # $cmd - Command that got us dispatched.
5297: # $id - Tail of the command, contain the id of the resource
5298: # we want to fetch.
5299: # $client - socket open on the client.
5300: # Return:
5301: # 1 - Inidcating processing can continue.
5302: # Side effects:
5303: # A reply is sent to the client.
5304: #
5305: sub tmp_get_handler {
5306: my ($cmd, $id, $client) = @_;
5307:
5308: my $userinput = "$cmd:$id";
5309:
5310:
5311: $id=~s/\W/\_/g;
5312: my $store;
5313: my $execdir=$perlvar{'lonDaemons'};
5314: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
5315: my $reply=<$store>;
5316: &Reply( $client, \$reply, $userinput);
5317: close $store;
5318: } else {
5319: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
5320: "while attempting tmpget\n", $userinput);
5321: }
5322:
5323: return 1;
5324: }
5325: ®ister_handler("tmpget", \&tmp_get_handler, 0, 1, 0);
5326:
5327: #
5328: # Process the tmpdel command. This command deletes a temp resource
5329: # created by the tmpput command.
5330: #
5331: # Parameters:
5332: # $cmd - Command that got us here.
5333: # $id - Id of the temporary resource created.
5334: # $client - socket open on the client process.
5335: #
5336: # Returns:
5337: # 1 - Indicating processing should continue.
5338: # Side Effects:
5339: # A file is deleted
5340: # A reply is sent to the client.
5341: sub tmp_del_handler {
5342: my ($cmd, $id, $client) = @_;
5343:
5344: my $userinput= "$cmd:$id";
5345:
5346: chomp($id);
5347: $id=~s/\W/\_/g;
5348: my $execdir=$perlvar{'lonDaemons'};
5349: if (unlink("$execdir/tmp/$id.tmp")) {
5350: &Reply($client, "ok\n", $userinput);
5351: } else {
5352: &Failure( $client, "error: ".($!+0)."Unlink tmp Failed ".
5353: "while attempting tmpdel\n", $userinput);
5354: }
5355:
5356: return 1;
5357:
5358: }
5359: ®ister_handler("tmpdel", \&tmp_del_handler, 0, 1, 0);
5360:
5361: #
5362: # Processes the setannounce command. This command
5363: # creates a file named announce.txt in the top directory of
5364: # the documentn root and sets its contents. The announce.txt file is
5365: # printed in its entirety at the LonCAPA login page. Note:
5366: # once the announcement.txt fileis created it cannot be deleted.
5367: # However, setting the contents of the file to empty removes the
5368: # announcement from the login page of loncapa so who cares.
5369: #
5370: # Parameters:
5371: # $cmd - The command that got us dispatched.
5372: # $announcement - The text of the announcement.
5373: # $client - Socket open on the client process.
5374: # Retunrns:
5375: # 1 - Indicating request processing should continue
5376: # Side Effects:
5377: # The file {DocRoot}/announcement.txt is created.
5378: # A reply is sent to $client.
5379: #
5380: sub set_announce_handler {
5381: my ($cmd, $announcement, $client) = @_;
5382:
5383: my $userinput = "$cmd:$announcement";
5384:
5385: chomp($announcement);
5386: $announcement=&unescape($announcement);
5387: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
5388: '/announcement.txt')) {
5389: print $store $announcement;
5390: close $store;
5391: &Reply($client, "ok\n", $userinput);
5392: } else {
5393: &Failure($client, "error: ".($!+0)."\n", $userinput);
5394: }
5395:
5396: return 1;
5397: }
5398: ®ister_handler("setannounce", \&set_announce_handler, 0, 1, 0);
5399:
5400: #
5401: # Return the version of the daemon. This can be used to determine
5402: # the compatibility of cross version installations or, alternatively to
5403: # simply know who's out of date and who isn't. Note that the version
5404: # is returned concatenated with the tail.
5405: # Parameters:
5406: # $cmd - the request that dispatched to us.
5407: # $tail - Tail of the request (client's version?).
5408: # $client - Socket open on the client.
5409: #Returns:
5410: # 1 - continue processing requests.
5411: # Side Effects:
5412: # Replies with version to $client.
5413: sub get_version_handler {
5414: my ($cmd, $tail, $client) = @_;
5415:
5416: my $userinput = $cmd.$tail;
5417:
5418: &Reply($client, &version($userinput)."\n", $userinput);
5419:
5420:
5421: return 1;
5422: }
5423: ®ister_handler("version", \&get_version_handler, 0, 1, 0);
5424:
5425: # Set the current host and domain. This is used to support
5426: # multihomed systems. Each IP of the system, or even separate daemons
5427: # on the same IP can be treated as handling a separate lonCAPA virtual
5428: # machine. This command selects the virtual lonCAPA. The client always
5429: # knows the right one since it is lonc and it is selecting the domain/system
5430: # from the hosts.tab file.
5431: # Parameters:
5432: # $cmd - Command that dispatched us.
5433: # $tail - Tail of the command (domain/host requested).
5434: # $socket - Socket open on the client.
5435: #
5436: # Returns:
5437: # 1 - Indicates the program should continue to process requests.
5438: # Side-effects:
5439: # The default domain/system context is modified for this daemon.
5440: # a reply is sent to the client.
5441: #
5442: sub set_virtual_host_handler {
5443: my ($cmd, $tail, $socket) = @_;
5444:
5445: my $userinput ="$cmd:$tail";
5446:
5447: &Reply($client, &sethost($userinput)."\n", $userinput);
5448:
5449:
5450: return 1;
5451: }
5452: ®ister_handler("sethost", \&set_virtual_host_handler, 0, 1, 0);
5453:
5454: # Process a request to exit:
5455: # - "bye" is sent to the client.
5456: # - The client socket is shutdown and closed.
5457: # - We indicate to the caller that we should exit.
5458: # Formal Parameters:
5459: # $cmd - The command that got us here.
5460: # $tail - Tail of the command (empty).
5461: # $client - Socket open on the tail.
5462: # Returns:
5463: # 0 - Indicating the program should exit!!
5464: #
5465: sub exit_handler {
5466: my ($cmd, $tail, $client) = @_;
5467:
5468: my $userinput = "$cmd:$tail";
5469:
5470: &logthis("Client $clientip ($clientname) hanging up: $userinput");
5471: &Reply($client, "bye\n", $userinput);
5472: $client->shutdown(2); # shutdown the socket forcibly.
5473: $client->close();
5474:
5475: return 0;
5476: }
5477: ®ister_handler("exit", \&exit_handler, 0,1,1);
5478: ®ister_handler("init", \&exit_handler, 0,1,1);
5479: ®ister_handler("quit", \&exit_handler, 0,1,1);
5480:
5481: # Determine if auto-enrollment is enabled.
5482: # Note that the original had what I believe to be a defect.
5483: # The original returned 0 if the requestor was not a registerd client.
5484: # It should return "refused".
5485: # Formal Parameters:
5486: # $cmd - The command that invoked us.
5487: # $tail - The tail of the command (Extra command parameters.
5488: # $client - The socket open on the client that issued the request.
5489: # Returns:
5490: # 1 - Indicating processing should continue.
5491: #
5492: sub enrollment_enabled_handler {
5493: my ($cmd, $tail, $client) = @_;
5494: my $userinput = $cmd.":".$tail; # For logging purposes.
5495:
5496:
5497: my ($cdom) = split(/:/, $tail, 2); # Domain we're asking about.
5498:
5499: my $outcome = &localenroll::run($cdom);
5500: &Reply($client, \$outcome, $userinput);
5501:
5502: return 1;
5503: }
5504: ®ister_handler("autorun", \&enrollment_enabled_handler, 0, 1, 0);
5505:
5506: #
5507: # Validate an institutional code used for a LON-CAPA course.
5508: #
5509: # Formal Parameters:
5510: # $cmd - The command request that got us dispatched.
5511: # $tail - The tail of the command. In this case,
5512: # this is a colon separated set of words that will be split
5513: # into:
5514: # $dom - The domain for which the check of
5515: # institutional course code will occur.
5516: #
5517: # $instcode - The institutional code for the course
5518: # being requested, or validated for rights
5519: # to request.
5520: #
5521: # $owner - The course requestor (who will be the
5522: # course owner, in the form username:domain
5523: #
5524: # $client - Socket open on the client.
5525: # Returns:
5526: # 1 - Indicating processing should continue.
5527: #
5528: sub validate_instcode_handler {
5529: my ($cmd, $tail, $client) = @_;
5530: my $userinput = "$cmd:$tail";
5531: my ($dom,$instcode,$owner) = split(/:/, $tail);
5532: $instcode = &unescape($instcode);
5533: $owner = &unescape($owner);
5534: my ($outcome,$description,$credits) =
5535: &localenroll::validate_instcode($dom,$instcode,$owner);
5536: my $result = &escape($outcome).'&'.&escape($description).'&'.
5537: &escape($credits);
5538: &Reply($client, \$result, $userinput);
5539:
5540: return 1;
5541: }
5542: ®ister_handler("autovalidateinstcode", \&validate_instcode_handler, 0, 1, 0);
5543:
5544: # Get the official sections for which auto-enrollment is possible.
5545: # Since the admin people won't know about 'unofficial sections'
5546: # we cannot auto-enroll on them.
5547: # Formal Parameters:
5548: # $cmd - The command request that got us dispatched here.
5549: # $tail - The remainder of the request. In our case this
5550: # will be split into:
5551: # $coursecode - The course name from the admin point of view.
5552: # $cdom - The course's domain(?).
5553: # $client - Socket open on the client.
5554: # Returns:
5555: # 1 - Indiciting processing should continue.
5556: #
5557: sub get_sections_handler {
5558: my ($cmd, $tail, $client) = @_;
5559: my $userinput = "$cmd:$tail";
5560:
5561: my ($coursecode, $cdom) = split(/:/, $tail);
5562: my @secs = &localenroll::get_sections($coursecode,$cdom);
5563: my $seclist = &escape(join(':',@secs));
5564:
5565: &Reply($client, \$seclist, $userinput);
5566:
5567:
5568: return 1;
5569: }
5570: ®ister_handler("autogetsections", \&get_sections_handler, 0, 1, 0);
5571:
5572: # Validate the owner of a new course section.
5573: #
5574: # Formal Parameters:
5575: # $cmd - Command that got us dispatched.
5576: # $tail - the remainder of the command. For us this consists of a
5577: # colon separated string containing:
5578: # $inst - Course Id from the institutions point of view.
5579: # $owner - Proposed owner of the course.
5580: # $cdom - Domain of the course (from the institutions
5581: # point of view?)..
5582: # $client - Socket open on the client.
5583: #
5584: # Returns:
5585: # 1 - Processing should continue.
5586: #
5587: sub validate_course_owner_handler {
5588: my ($cmd, $tail, $client) = @_;
5589: my $userinput = "$cmd:$tail";
5590: my ($inst_course_id, $owner, $cdom, $coowners) = split(/:/, $tail);
5591:
5592: $owner = &unescape($owner);
5593: $coowners = &unescape($coowners);
5594: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom,$coowners);
5595: &Reply($client, \$outcome, $userinput);
5596:
5597:
5598:
5599: return 1;
5600: }
5601: ®ister_handler("autonewcourse", \&validate_course_owner_handler, 0, 1, 0);
5602:
5603: #
5604: # Validate a course section in the official schedule of classes
5605: # from the institutions point of view (part of autoenrollment).
5606: #
5607: # Formal Parameters:
5608: # $cmd - The command request that got us dispatched.
5609: # $tail - The tail of the command. In this case,
5610: # this is a colon separated set of words that will be split
5611: # into:
5612: # $inst_course_id - The course/section id from the
5613: # institutions point of view.
5614: # $cdom - The domain from the institutions
5615: # point of view.
5616: # $client - Socket open on the client.
5617: # Returns:
5618: # 1 - Indicating processing should continue.
5619: #
5620: sub validate_course_section_handler {
5621: my ($cmd, $tail, $client) = @_;
5622: my $userinput = "$cmd:$tail";
5623: my ($inst_course_id, $cdom) = split(/:/, $tail);
5624:
5625: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
5626: &Reply($client, \$outcome, $userinput);
5627:
5628:
5629: return 1;
5630: }
5631: ®ister_handler("autovalidatecourse", \&validate_course_section_handler, 0, 1, 0);
5632:
5633: #
5634: # Validate course owner's access to enrollment data for specific class section.
5635: #
5636: #
5637: # Formal Parameters:
5638: # $cmd - The command request that got us dispatched.
5639: # $tail - The tail of the command. In this case this is a colon separated
5640: # set of words that will be split into:
5641: # $inst_class - Institutional code for the specific class section
5642: # $courseowner - The escaped username:domain of the course owner
5643: # $cdom - The domain of the course from the institution's
5644: # point of view.
5645: # $client - The socket open on the client.
5646: # Returns:
5647: # 1 - continue processing.
5648: #
5649:
5650: sub validate_class_access_handler {
5651: my ($cmd, $tail, $client) = @_;
5652: my $userinput = "$cmd:$tail";
5653: my ($inst_class,$ownerlist,$cdom) = split(/:/, $tail);
5654: my $owners = &unescape($ownerlist);
5655: my $outcome;
5656: eval {
5657: local($SIG{__DIE__})='DEFAULT';
5658: $outcome=&localenroll::check_section($inst_class,$owners,$cdom);
5659: };
5660: &Reply($client,\$outcome, $userinput);
5661:
5662: return 1;
5663: }
5664: ®ister_handler("autovalidateclass_sec", \&validate_class_access_handler, 0, 1, 0);
5665:
5666: #
5667: # Create a password for a new LON-CAPA user added by auto-enrollment.
5668: # Only used for case where authentication method for new user is localauth
5669: #
5670: # Formal Parameters:
5671: # $cmd - The command request that got us dispatched.
5672: # $tail - The tail of the command. In this case this is a colon separated
5673: # set of words that will be split into:
5674: # $authparam - An authentication parameter (localauth parameter).
5675: # $cdom - The domain of the course from the institution's
5676: # point of view.
5677: # $client - The socket open on the client.
5678: # Returns:
5679: # 1 - continue processing.
5680: #
5681: sub create_auto_enroll_password_handler {
5682: my ($cmd, $tail, $client) = @_;
5683: my $userinput = "$cmd:$tail";
5684:
5685: my ($authparam, $cdom) = split(/:/, $userinput);
5686:
5687: my ($create_passwd,$authchk);
5688: ($authparam,
5689: $create_passwd,
5690: $authchk) = &localenroll::create_password($authparam,$cdom);
5691:
5692: &Reply($client, &escape($authparam.':'.$create_passwd.':'.$authchk)."\n",
5693: $userinput);
5694:
5695:
5696: return 1;
5697: }
5698: ®ister_handler("autocreatepassword", \&create_auto_enroll_password_handler,
5699: 0, 1, 0);
5700:
5701: sub auto_export_grades_handler {
5702: my ($cmd, $tail, $client) = @_;
5703: my $userinput = "$cmd:$tail";
5704: my ($cdom,$cnum,$info,$data) = split(/:/,$tail);
5705: my $inforef = &Apache::lonnet::thaw_unescape($info);
5706: my $dataref = &Apache::lonnet::thaw_unescape($data);
5707: my ($outcome,$result);;
5708: eval {
5709: local($SIG{__DIE__})='DEFAULT';
5710: my %rtnhash;
5711: $outcome=&localenroll::export_grades($cdom,$cnum,$inforef,$dataref,\%rtnhash);
5712: if ($outcome eq 'ok') {
5713: foreach my $key (keys(%rtnhash)) {
5714: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rtnhash{$key}).'&';
5715: }
5716: $result =~ s/\&$//;
5717: }
5718: };
5719: if (!$@) {
5720: if ($outcome eq 'ok') {
5721: if ($cipher) {
5722: my $cmdlength=length($result);
5723: $result.=" ";
5724: my $encresult='';
5725: for (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
5726: $encresult.= unpack("H16",
5727: $cipher->encrypt(substr($result,
5728: $encidx,
5729: 8)));
5730: }
5731: &Reply( $client, "enc:$cmdlength:$encresult\n", $userinput);
5732: } else {
5733: &Failure( $client, "error:no_key\n", $userinput);
5734: }
5735: } else {
5736: &Reply($client, "$outcome\n", $userinput);
5737: }
5738: } else {
5739: &Failure($client,"export_error\n",$userinput);
5740: }
5741: return 1;
5742: }
5743: ®ister_handler("autoexportgrades", \&auto_export_grades_handler,
5744: 0, 1, 0);
5745:
5746: # Retrieve and remove temporary files created by/during autoenrollment.
5747: #
5748: # Formal Parameters:
5749: # $cmd - The command that got us dispatched.
5750: # $tail - The tail of the command. In our case this is a colon
5751: # separated list that will be split into:
5752: # $filename - The name of the file to retrieve.
5753: # The filename is given as a path relative to
5754: # the LonCAPA temp file directory.
5755: # $client - Socket open on the client.
5756: #
5757: # Returns:
5758: # 1 - Continue processing.
5759: sub retrieve_auto_file_handler {
5760: my ($cmd, $tail, $client) = @_;
5761: my $userinput = "cmd:$tail";
5762:
5763: my ($filename) = split(/:/, $tail);
5764:
5765: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
5766:
5767: if ($filename =~m{/\.\./}) {
5768: &Failure($client, "refused\n", $userinput);
5769: } elsif ($filename !~ /^$LONCAPA::match_domain\_$LONCAPA::match_courseid\_.+_classlist\.xml$/) {
5770: &Failure($client, "refused\n", $userinput);
5771: } elsif ( (-e $source) && ($filename ne '') ) {
5772: my $reply = '';
5773: if (open(my $fh,$source)) {
5774: while (<$fh>) {
5775: chomp($_);
5776: $_ =~ s/^\s+//g;
5777: $_ =~ s/\s+$//g;
5778: $reply .= $_;
5779: }
5780: close($fh);
5781: &Reply($client, &escape($reply)."\n", $userinput);
5782:
5783: # Does this have to be uncommented??!? (RF).
5784: #
5785: # unlink($source);
5786: } else {
5787: &Failure($client, "error\n", $userinput);
5788: }
5789: } else {
5790: &Failure($client, "error\n", $userinput);
5791: }
5792:
5793:
5794: return 1;
5795: }
5796: ®ister_handler("autoretrieve", \&retrieve_auto_file_handler, 0,1,0);
5797:
5798: sub crsreq_checks_handler {
5799: my ($cmd, $tail, $client) = @_;
5800: my $userinput = "$cmd:$tail";
5801: my $dom = $tail;
5802: my $result;
5803: my @reqtypes = ('official','unofficial','community','textbook','placement');
5804: eval {
5805: local($SIG{__DIE__})='DEFAULT';
5806: my %validations;
5807: my $response = &localenroll::crsreq_checks($dom,\@reqtypes,
5808: \%validations);
5809: if ($response eq 'ok') {
5810: foreach my $key (keys(%validations)) {
5811: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($validations{$key}).'&';
5812: }
5813: $result =~ s/\&$//;
5814: } else {
5815: $result = 'error';
5816: }
5817: };
5818: if (!$@) {
5819: &Reply($client, \$result, $userinput);
5820: } else {
5821: &Failure($client,"unknown_cmd\n",$userinput);
5822: }
5823: return 1;
5824: }
5825: ®ister_handler("autocrsreqchecks", \&crsreq_checks_handler, 0, 1, 0);
5826:
5827: sub validate_crsreq_handler {
5828: my ($cmd, $tail, $client) = @_;
5829: my $userinput = "$cmd:$tail";
5830: my ($dom,$owner,$crstype,$inststatuslist,$instcode,$instseclist,$customdata) = split(/:/, $tail);
5831: $instcode = &unescape($instcode);
5832: $owner = &unescape($owner);
5833: $crstype = &unescape($crstype);
5834: $inststatuslist = &unescape($inststatuslist);
5835: $instcode = &unescape($instcode);
5836: $instseclist = &unescape($instseclist);
5837: my $custominfo = &Apache::lonnet::thaw_unescape($customdata);
5838: my $outcome;
5839: eval {
5840: local($SIG{__DIE__})='DEFAULT';
5841: $outcome = &localenroll::validate_crsreq($dom,$owner,$crstype,
5842: $inststatuslist,$instcode,
5843: $instseclist,$custominfo);
5844: };
5845: if (!$@) {
5846: &Reply($client, \$outcome, $userinput);
5847: } else {
5848: &Failure($client,"unknown_cmd\n",$userinput);
5849: }
5850: return 1;
5851: }
5852: ®ister_handler("autocrsreqvalidation", \&validate_crsreq_handler, 0, 1, 0);
5853:
5854: sub crsreq_update_handler {
5855: my ($cmd, $tail, $client) = @_;
5856: my $userinput = "$cmd:$tail";
5857: my ($cdom,$cnum,$crstype,$action,$ownername,$ownerdomain,$fullname,$title,$code,
5858: $accessstart,$accessend,$infohashref) =
5859: split(/:/, $tail);
5860: $crstype = &unescape($crstype);
5861: $action = &unescape($action);
5862: $ownername = &unescape($ownername);
5863: $ownerdomain = &unescape($ownerdomain);
5864: $fullname = &unescape($fullname);
5865: $title = &unescape($title);
5866: $code = &unescape($code);
5867: $accessstart = &unescape($accessstart);
5868: $accessend = &unescape($accessend);
5869: my $incoming = &Apache::lonnet::thaw_unescape($infohashref);
5870: my ($result,$outcome);
5871: eval {
5872: local($SIG{__DIE__})='DEFAULT';
5873: my %rtnhash;
5874: $outcome = &localenroll::crsreq_updates($cdom,$cnum,$crstype,$action,
5875: $ownername,$ownerdomain,$fullname,
5876: $title,$code,$accessstart,$accessend,
5877: $incoming,\%rtnhash);
5878: if ($outcome eq 'ok') {
5879: my @posskeys = qw(createdweb createdmsg createdcustomized createdactions queuedweb queuedmsg formitems reviewweb validationjs onload javascript);
5880: foreach my $key (keys(%rtnhash)) {
5881: if (grep(/^\Q$key\E/,@posskeys)) {
5882: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rtnhash{$key}).'&';
5883: }
5884: }
5885: $result =~ s/\&$//;
5886: }
5887: };
5888: if (!$@) {
5889: if ($outcome eq 'ok') {
5890: &Reply($client, \$result, $userinput);
5891: } else {
5892: &Reply($client, "format_error\n", $userinput);
5893: }
5894: } else {
5895: &Failure($client,"unknown_cmd\n",$userinput);
5896: }
5897: return 1;
5898: }
5899: ®ister_handler("autocrsrequpdate", \&crsreq_update_handler, 0, 1, 0);
5900:
5901: #
5902: # Read and retrieve institutional code format (for support form).
5903: # Formal Parameters:
5904: # $cmd - Command that dispatched us.
5905: # $tail - Tail of the command. In this case it conatins
5906: # the course domain and the coursename.
5907: # $client - Socket open on the client.
5908: # Returns:
5909: # 1 - Continue processing.
5910: #
5911: sub get_institutional_code_format_handler {
5912: my ($cmd, $tail, $client) = @_;
5913: my $userinput = "$cmd:$tail";
5914:
5915: my $reply;
5916: my($cdom,$course) = split(/:/,$tail);
5917: my @pairs = split/\&/,$course;
5918: my %instcodes = ();
5919: my %codes = ();
5920: my @codetitles = ();
5921: my %cat_titles = ();
5922: my %cat_order = ();
5923: foreach (@pairs) {
5924: my ($key,$value) = split/=/,$_;
5925: $instcodes{&unescape($key)} = &unescape($value);
5926: }
5927: my $formatreply = &localenroll::instcode_format($cdom,
5928: \%instcodes,
5929: \%codes,
5930: \@codetitles,
5931: \%cat_titles,
5932: \%cat_order);
5933: if ($formatreply eq 'ok') {
5934: my $codes_str = &Apache::lonnet::hash2str(%codes);
5935: my $codetitles_str = &Apache::lonnet::array2str(@codetitles);
5936: my $cat_titles_str = &Apache::lonnet::hash2str(%cat_titles);
5937: my $cat_order_str = &Apache::lonnet::hash2str(%cat_order);
5938: &Reply($client,
5939: $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'
5940: .$cat_order_str."\n",
5941: $userinput);
5942: } else {
5943: # this else branch added by RF since if not ok, lonc will
5944: # hang waiting on reply until timeout.
5945: #
5946: &Reply($client, "format_error\n", $userinput);
5947: }
5948:
5949: return 1;
5950: }
5951: ®ister_handler("autoinstcodeformat",
5952: \&get_institutional_code_format_handler,0,1,0);
5953:
5954: sub get_institutional_defaults_handler {
5955: my ($cmd, $tail, $client) = @_;
5956: my $userinput = "$cmd:$tail";
5957:
5958: my $dom = $tail;
5959: my %defaults_hash;
5960: my @code_order;
5961: my $outcome;
5962: eval {
5963: local($SIG{__DIE__})='DEFAULT';
5964: $outcome = &localenroll::instcode_defaults($dom,\%defaults_hash,
5965: \@code_order);
5966: };
5967: if (!$@) {
5968: if ($outcome eq 'ok') {
5969: my $result='';
5970: while (my ($key,$value) = each(%defaults_hash)) {
5971: $result.=&escape($key).'='.&escape($value).'&';
5972: }
5973: $result .= 'code_order='.&escape(join('&',@code_order));
5974: &Reply($client,\$result,$userinput);
5975: } else {
5976: &Reply($client,"error\n", $userinput);
5977: }
5978: } else {
5979: &Failure($client,"unknown_cmd\n",$userinput);
5980: }
5981: }
5982: ®ister_handler("autoinstcodedefaults",
5983: \&get_institutional_defaults_handler,0,1,0);
5984:
5985: sub get_possible_instcodes_handler {
5986: my ($cmd, $tail, $client) = @_;
5987: my $userinput = "$cmd:$tail";
5988:
5989: my $reply;
5990: my $cdom = $tail;
5991: my (@codetitles,%cat_titles,%cat_order,@code_order);
5992: my $formatreply = &localenroll::possible_instcodes($cdom,
5993: \@codetitles,
5994: \%cat_titles,
5995: \%cat_order,
5996: \@code_order);
5997: if ($formatreply eq 'ok') {
5998: my $result = join('&',map {&escape($_);} (@codetitles)).':';
5999: $result .= join('&',map {&escape($_);} (@code_order)).':';
6000: foreach my $key (keys(%cat_titles)) {
6001: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($cat_titles{$key}).'&';
6002: }
6003: $result =~ s/\&$//;
6004: $result .= ':';
6005: foreach my $key (keys(%cat_order)) {
6006: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($cat_order{$key}).'&';
6007: }
6008: $result =~ s/\&$//;
6009: &Reply($client,\$result,$userinput);
6010: } else {
6011: &Reply($client, "format_error\n", $userinput);
6012: }
6013: return 1;
6014: }
6015: ®ister_handler("autopossibleinstcodes",
6016: \&get_possible_instcodes_handler,0,1,0);
6017:
6018: sub get_institutional_user_rules {
6019: my ($cmd, $tail, $client) = @_;
6020: my $userinput = "$cmd:$tail";
6021: my $dom = &unescape($tail);
6022: my (%rules_hash,@rules_order);
6023: my $outcome;
6024: eval {
6025: local($SIG{__DIE__})='DEFAULT';
6026: $outcome = &localenroll::username_rules($dom,\%rules_hash,\@rules_order);
6027: };
6028: if (!$@) {
6029: if ($outcome eq 'ok') {
6030: my $result;
6031: foreach my $key (keys(%rules_hash)) {
6032: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
6033: }
6034: $result =~ s/\&$//;
6035: $result .= ':';
6036: if (@rules_order > 0) {
6037: foreach my $item (@rules_order) {
6038: $result .= &escape($item).'&';
6039: }
6040: }
6041: $result =~ s/\&$//;
6042: &Reply($client,\$result,$userinput);
6043: } else {
6044: &Reply($client,"error\n", $userinput);
6045: }
6046: } else {
6047: &Failure($client,"unknown_cmd\n",$userinput);
6048: }
6049: }
6050: ®ister_handler("instuserrules",\&get_institutional_user_rules,0,1,0);
6051:
6052: sub get_institutional_id_rules {
6053: my ($cmd, $tail, $client) = @_;
6054: my $userinput = "$cmd:$tail";
6055: my $dom = &unescape($tail);
6056: my (%rules_hash,@rules_order);
6057: my $outcome;
6058: eval {
6059: local($SIG{__DIE__})='DEFAULT';
6060: $outcome = &localenroll::id_rules($dom,\%rules_hash,\@rules_order);
6061: };
6062: if (!$@) {
6063: if ($outcome eq 'ok') {
6064: my $result;
6065: foreach my $key (keys(%rules_hash)) {
6066: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
6067: }
6068: $result =~ s/\&$//;
6069: $result .= ':';
6070: if (@rules_order > 0) {
6071: foreach my $item (@rules_order) {
6072: $result .= &escape($item).'&';
6073: }
6074: }
6075: $result =~ s/\&$//;
6076: &Reply($client,\$result,$userinput);
6077: } else {
6078: &Reply($client,"error\n", $userinput);
6079: }
6080: } else {
6081: &Failure($client,"unknown_cmd\n",$userinput);
6082: }
6083: }
6084: ®ister_handler("instidrules",\&get_institutional_id_rules,0,1,0);
6085:
6086: sub get_institutional_selfcreate_rules {
6087: my ($cmd, $tail, $client) = @_;
6088: my $userinput = "$cmd:$tail";
6089: my $dom = &unescape($tail);
6090: my (%rules_hash,@rules_order);
6091: my $outcome;
6092: eval {
6093: local($SIG{__DIE__})='DEFAULT';
6094: $outcome = &localenroll::selfcreate_rules($dom,\%rules_hash,\@rules_order);
6095: };
6096: if (!$@) {
6097: if ($outcome eq 'ok') {
6098: my $result;
6099: foreach my $key (keys(%rules_hash)) {
6100: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
6101: }
6102: $result =~ s/\&$//;
6103: $result .= ':';
6104: if (@rules_order > 0) {
6105: foreach my $item (@rules_order) {
6106: $result .= &escape($item).'&';
6107: }
6108: }
6109: $result =~ s/\&$//;
6110: &Reply($client,\$result,$userinput);
6111: } else {
6112: &Reply($client,"error\n", $userinput);
6113: }
6114: } else {
6115: &Failure($client,"unknown_cmd\n",$userinput);
6116: }
6117: }
6118: ®ister_handler("instemailrules",\&get_institutional_selfcreate_rules,0,1,0);
6119:
6120:
6121: sub institutional_username_check {
6122: my ($cmd, $tail, $client) = @_;
6123: my $userinput = "$cmd:$tail";
6124: my %rulecheck;
6125: my $outcome;
6126: my ($udom,$uname,@rules) = split(/:/,$tail);
6127: $udom = &unescape($udom);
6128: $uname = &unescape($uname);
6129: @rules = map {&unescape($_);} (@rules);
6130: eval {
6131: local($SIG{__DIE__})='DEFAULT';
6132: $outcome = &localenroll::username_check($udom,$uname,\@rules,\%rulecheck);
6133: };
6134: if (!$@) {
6135: if ($outcome eq 'ok') {
6136: my $result='';
6137: foreach my $key (keys(%rulecheck)) {
6138: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
6139: }
6140: &Reply($client,\$result,$userinput);
6141: } else {
6142: &Reply($client,"error\n", $userinput);
6143: }
6144: } else {
6145: &Failure($client,"unknown_cmd\n",$userinput);
6146: }
6147: }
6148: ®ister_handler("instrulecheck",\&institutional_username_check,0,1,0);
6149:
6150: sub institutional_id_check {
6151: my ($cmd, $tail, $client) = @_;
6152: my $userinput = "$cmd:$tail";
6153: my %rulecheck;
6154: my $outcome;
6155: my ($udom,$id,@rules) = split(/:/,$tail);
6156: $udom = &unescape($udom);
6157: $id = &unescape($id);
6158: @rules = map {&unescape($_);} (@rules);
6159: eval {
6160: local($SIG{__DIE__})='DEFAULT';
6161: $outcome = &localenroll::id_check($udom,$id,\@rules,\%rulecheck);
6162: };
6163: if (!$@) {
6164: if ($outcome eq 'ok') {
6165: my $result='';
6166: foreach my $key (keys(%rulecheck)) {
6167: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
6168: }
6169: &Reply($client,\$result,$userinput);
6170: } else {
6171: &Reply($client,"error\n", $userinput);
6172: }
6173: } else {
6174: &Failure($client,"unknown_cmd\n",$userinput);
6175: }
6176: }
6177: ®ister_handler("instidrulecheck",\&institutional_id_check,0,1,0);
6178:
6179: sub institutional_selfcreate_check {
6180: my ($cmd, $tail, $client) = @_;
6181: my $userinput = "$cmd:$tail";
6182: my %rulecheck;
6183: my $outcome;
6184: my ($udom,$email,@rules) = split(/:/,$tail);
6185: $udom = &unescape($udom);
6186: $email = &unescape($email);
6187: @rules = map {&unescape($_);} (@rules);
6188: eval {
6189: local($SIG{__DIE__})='DEFAULT';
6190: $outcome = &localenroll::selfcreate_check($udom,$email,\@rules,\%rulecheck);
6191: };
6192: if (!$@) {
6193: if ($outcome eq 'ok') {
6194: my $result='';
6195: foreach my $key (keys(%rulecheck)) {
6196: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
6197: }
6198: &Reply($client,\$result,$userinput);
6199: } else {
6200: &Reply($client,"error\n", $userinput);
6201: }
6202: } else {
6203: &Failure($client,"unknown_cmd\n",$userinput);
6204: }
6205: }
6206: ®ister_handler("instselfcreatecheck",\&institutional_selfcreate_check,0,1,0);
6207:
6208: # Get domain specific conditions for import of student photographs to a course
6209: #
6210: # Retrieves information from photo_permission subroutine in localenroll.
6211: # Returns outcome (ok) if no processing errors, and whether course owner is
6212: # required to accept conditions of use (yes/no).
6213: #
6214: #
6215: sub photo_permission_handler {
6216: my ($cmd, $tail, $client) = @_;
6217: my $userinput = "$cmd:$tail";
6218: my $cdom = $tail;
6219: my ($perm_reqd,$conditions);
6220: my $outcome;
6221: eval {
6222: local($SIG{__DIE__})='DEFAULT';
6223: $outcome = &localenroll::photo_permission($cdom,\$perm_reqd,
6224: \$conditions);
6225: };
6226: if (!$@) {
6227: &Reply($client, &escape($outcome.':'.$perm_reqd.':'. $conditions)."\n",
6228: $userinput);
6229: } else {
6230: &Failure($client,"unknown_cmd\n",$userinput);
6231: }
6232: return 1;
6233: }
6234: ®ister_handler("autophotopermission",\&photo_permission_handler,0,1,0);
6235:
6236: #
6237: # Checks if student photo is available for a user in the domain, in the user's
6238: # directory (in /userfiles/internal/studentphoto.jpg).
6239: # Uses localstudentphoto:fetch() to ensure there is an up to date copy of
6240: # the student's photo.
6241:
6242: sub photo_check_handler {
6243: my ($cmd, $tail, $client) = @_;
6244: my $userinput = "$cmd:$tail";
6245: my ($udom,$uname,$pid) = split(/:/,$tail);
6246: $udom = &unescape($udom);
6247: $uname = &unescape($uname);
6248: $pid = &unescape($pid);
6249: my $path=&propath($udom,$uname).'/userfiles/internal/';
6250: if (!-e $path) {
6251: &mkpath($path);
6252: }
6253: my $response;
6254: my $result = &localstudentphoto::fetch($udom,$uname,$pid,\$response);
6255: $result .= ':'.$response;
6256: &Reply($client, &escape($result)."\n",$userinput);
6257: return 1;
6258: }
6259: ®ister_handler("autophotocheck",\&photo_check_handler,0,1,0);
6260:
6261: #
6262: # Retrieve information from localenroll about whether to provide a button
6263: # for users who have enbled import of student photos to initiate an
6264: # update of photo files for registered students. Also include
6265: # comment to display alongside button.
6266:
6267: sub photo_choice_handler {
6268: my ($cmd, $tail, $client) = @_;
6269: my $userinput = "$cmd:$tail";
6270: my $cdom = &unescape($tail);
6271: my ($update,$comment);
6272: eval {
6273: local($SIG{__DIE__})='DEFAULT';
6274: ($update,$comment) = &localenroll::manager_photo_update($cdom);
6275: };
6276: if (!$@) {
6277: &Reply($client,&escape($update).':'.&escape($comment)."\n",$userinput);
6278: } else {
6279: &Failure($client,"unknown_cmd\n",$userinput);
6280: }
6281: return 1;
6282: }
6283: ®ister_handler("autophotochoice",\&photo_choice_handler,0,1,0);
6284:
6285: #
6286: # Gets a student's photo to exist (in the correct image type) in the user's
6287: # directory.
6288: # Formal Parameters:
6289: # $cmd - The command request that got us dispatched.
6290: # $tail - A colon separated set of words that will be split into:
6291: # $domain - student's domain
6292: # $uname - student username
6293: # $type - image type desired
6294: # $client - The socket open on the client.
6295: # Returns:
6296: # 1 - continue processing.
6297:
6298: sub student_photo_handler {
6299: my ($cmd, $tail, $client) = @_;
6300: my ($domain,$uname,$ext,$type) = split(/:/, $tail);
6301:
6302: my $path=&propath($domain,$uname). '/userfiles/internal/';
6303: my $filename = 'studentphoto.'.$ext;
6304: if ($type eq 'thumbnail') {
6305: $filename = 'studentphoto_tn.'.$ext;
6306: }
6307: if (-e $path.$filename) {
6308: &Reply($client,"ok\n","$cmd:$tail");
6309: return 1;
6310: }
6311: &mkpath($path);
6312: my $file;
6313: if ($type eq 'thumbnail') {
6314: eval {
6315: local($SIG{__DIE__})='DEFAULT';
6316: $file=&localstudentphoto::fetch_thumbnail($domain,$uname);
6317: };
6318: } else {
6319: $file=&localstudentphoto::fetch($domain,$uname);
6320: }
6321: if (!$file) {
6322: &Failure($client,"unavailable\n","$cmd:$tail");
6323: return 1;
6324: }
6325: if (!-e $path.$filename) { &convert_photo($file,$path.$filename); }
6326: if (-e $path.$filename) {
6327: &Reply($client,"ok\n","$cmd:$tail");
6328: return 1;
6329: }
6330: &Failure($client,"unable_to_convert\n","$cmd:$tail");
6331: return 1;
6332: }
6333: ®ister_handler("studentphoto", \&student_photo_handler, 0, 1, 0);
6334:
6335: sub inst_usertypes_handler {
6336: my ($cmd, $domain, $client) = @_;
6337: my $res;
6338: my $userinput = $cmd.":".$domain; # For logging purposes.
6339: my (%typeshash,@order,$result);
6340: eval {
6341: local($SIG{__DIE__})='DEFAULT';
6342: $result=&localenroll::inst_usertypes($domain,\%typeshash,\@order);
6343: };
6344: if ($result eq 'ok') {
6345: if (keys(%typeshash) > 0) {
6346: foreach my $key (keys(%typeshash)) {
6347: $res.=&escape($key).'='.&escape($typeshash{$key}).'&';
6348: }
6349: }
6350: $res=~s/\&$//;
6351: $res .= ':';
6352: if (@order > 0) {
6353: foreach my $item (@order) {
6354: $res .= &escape($item).'&';
6355: }
6356: }
6357: $res=~s/\&$//;
6358: }
6359: &Reply($client, \$res, $userinput);
6360: return 1;
6361: }
6362: ®ister_handler("inst_usertypes", \&inst_usertypes_handler, 0, 1, 0);
6363:
6364: # mkpath makes all directories for a file, expects an absolute path with a
6365: # file or a trailing / if just a dir is passed
6366: # returns 1 on success 0 on failure
6367: sub mkpath {
6368: my ($file)=@_;
6369: my @parts=split(/\//,$file,-1);
6370: my $now=$parts[0].'/'.$parts[1].'/'.$parts[2];
6371: for (my $i=3;$i<= ($#parts-1);$i++) {
6372: $now.='/'.$parts[$i];
6373: if (!-e $now) {
6374: if (!mkdir($now,0770)) { return 0; }
6375: }
6376: }
6377: return 1;
6378: }
6379:
6380: #---------------------------------------------------------------
6381: #
6382: # Getting, decoding and dispatching requests:
6383: #
6384: #
6385: # Get a Request:
6386: # Gets a Request message from the client. The transaction
6387: # is defined as a 'line' of text. We remove the new line
6388: # from the text line.
6389: #
6390: sub get_request {
6391: my $input = <$client>;
6392: chomp($input);
6393:
6394: &Debug("get_request: Request = $input\n");
6395:
6396: &status('Processing '.$clientname.':'.$input);
6397:
6398: return $input;
6399: }
6400: #---------------------------------------------------------------
6401: #
6402: # Process a request. This sub should shrink as each action
6403: # gets farmed out into a separat sub that is registered
6404: # with the dispatch hash.
6405: #
6406: # Parameters:
6407: # user_input - The request received from the client (lonc).
6408: #
6409: # Returns:
6410: # true to keep processing, false if caller should exit.
6411: #
6412: sub process_request {
6413: my ($userinput) = @_; # Easier for now to break style than to
6414: # fix all the userinput -> user_input.
6415: my $wasenc = 0; # True if request was encrypted.
6416: # ------------------------------------------------------------ See if encrypted
6417: # for command
6418: # sethost:<server>
6419: # <command>:<args>
6420: # we just send it to the processor
6421: # for
6422: # sethost:<server>:<command>:<args>
6423: # we do the implict set host and then do the command
6424: if ($userinput =~ /^sethost:/) {
6425: (my $cmd,my $newid,$userinput) = split(':',$userinput,3);
6426: if (defined($userinput)) {
6427: &sethost("$cmd:$newid");
6428: } else {
6429: $userinput = "$cmd:$newid";
6430: }
6431: }
6432:
6433: if ($userinput =~ /^enc/) {
6434: $userinput = decipher($userinput);
6435: $wasenc=1;
6436: if(!$userinput) { # Cipher not defined.
6437: &Failure($client, "error: Encrypted data without negotated key\n");
6438: return 0;
6439: }
6440: }
6441: Debug("process_request: $userinput\n");
6442:
6443: #
6444: # The 'correct way' to add a command to lond is now to
6445: # write a sub to execute it and Add it to the command dispatch
6446: # hash via a call to register_handler.. The comments to that
6447: # sub should give you enough to go on to show how to do this
6448: # along with the examples that are building up as this code
6449: # is getting refactored. Until all branches of the
6450: # if/elseif monster below have been factored out into
6451: # separate procesor subs, if the dispatch hash is missing
6452: # the command keyword, we will fall through to the remainder
6453: # of the if/else chain below in order to keep this thing in
6454: # working order throughout the transmogrification.
6455:
6456: my ($command, $tail) = split(/:/, $userinput, 2);
6457: chomp($command);
6458: chomp($tail);
6459: $tail =~ s/(\r)//; # This helps people debugging with e.g. telnet.
6460: $command =~ s/(\r)//; # And this too for parameterless commands.
6461: if(!$tail) {
6462: $tail =""; # defined but blank.
6463: }
6464:
6465: &Debug("Command received: $command, encoded = $wasenc");
6466:
6467: if(defined $Dispatcher{$command}) {
6468:
6469: my $dispatch_info = $Dispatcher{$command};
6470: my $handler = $$dispatch_info[0];
6471: my $need_encode = $$dispatch_info[1];
6472: my $client_types = $$dispatch_info[2];
6473: Debug("Matched dispatch hash: mustencode: $need_encode "
6474: ."ClientType $client_types");
6475:
6476: # Validate the request:
6477:
6478: my $ok = 1;
6479: my $requesterprivs = 0;
6480: if(&isClient()) {
6481: $requesterprivs |= $CLIENT_OK;
6482: }
6483: if(&isManager()) {
6484: $requesterprivs |= $MANAGER_OK;
6485: }
6486: if($need_encode && (!$wasenc)) {
6487: Debug("Must encode but wasn't: $need_encode $wasenc");
6488: $ok = 0;
6489: }
6490: if(($client_types & $requesterprivs) == 0) {
6491: Debug("Client not privileged to do this operation");
6492: $ok = 0;
6493: }
6494: if ($ok) {
6495: if (ref($trust{$command}) eq 'HASH') {
6496: my $donechecks;
6497: if ($trust{$command}{'anywhere'}) {
6498: $donechecks = 1;
6499: } elsif ($trust{$command}{'manageronly'}) {
6500: unless (&isManager()) {
6501: $ok = 0;
6502: }
6503: $donechecks = 1;
6504: } elsif ($trust{$command}{'institutiononly'}) {
6505: unless ($clientsameinst) {
6506: $ok = 0;
6507: }
6508: $donechecks = 1;
6509: } elsif ($clientsameinst) {
6510: $donechecks = 1;
6511: }
6512: unless ($donechecks) {
6513: foreach my $rule (keys(%{$trust{$command}})) {
6514: next if ($rule eq 'remote');
6515: if ($trust{$command}{$rule}) {
6516: if ($clientprohibited{$rule}) {
6517: $ok = 0;
6518: } else {
6519: $ok = 1;
6520: $donechecks = 1;
6521: last;
6522: }
6523: }
6524: }
6525: }
6526: unless ($donechecks) {
6527: if ($trust{$command}{'remote'}) {
6528: if ($clientremoteok) {
6529: $ok = 1;
6530: } else {
6531: $ok = 0;
6532: }
6533: }
6534: }
6535: }
6536: }
6537:
6538: if($ok) {
6539: Debug("Dispatching to handler $command $tail");
6540: my $keep_going = &$handler($command, $tail, $client);
6541: return $keep_going;
6542: } else {
6543: Debug("Refusing to dispatch because client did not match requirements");
6544: Failure($client, "refused\n", $userinput);
6545: return 1;
6546: }
6547: }
6548:
6549: print $client "unknown_cmd\n";
6550: # -------------------------------------------------------------------- complete
6551: Debug("process_request - returning 1");
6552: return 1;
6553: }
6554: #
6555: # Decipher encoded traffic
6556: # Parameters:
6557: # input - Encoded data.
6558: # Returns:
6559: # Decoded data or undef if encryption key was not yet negotiated.
6560: # Implicit input:
6561: # cipher - This global holds the negotiated encryption key.
6562: #
6563: sub decipher {
6564: my ($input) = @_;
6565: my $output = '';
6566:
6567:
6568: if($cipher) {
6569: my($enc, $enclength, $encinput) = split(/:/, $input);
6570: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
6571: $output .=
6572: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
6573: }
6574: return substr($output, 0, $enclength);
6575: } else {
6576: return undef;
6577: }
6578: }
6579:
6580: #
6581: # Register a command processor. This function is invoked to register a sub
6582: # to process a request. Once registered, the ProcessRequest sub can automatically
6583: # dispatch requests to an appropriate sub, and do the top level validity checking
6584: # as well:
6585: # - Is the keyword recognized.
6586: # - Is the proper client type attempting the request.
6587: # - Is the request encrypted if it has to be.
6588: # Parameters:
6589: # $request_name - Name of the request being registered.
6590: # This is the command request that will match
6591: # against the hash keywords to lookup the information
6592: # associated with the dispatch information.
6593: # $procedure - Reference to a sub to call to process the request.
6594: # All subs get called as follows:
6595: # Procedure($cmd, $tail, $replyfd, $key)
6596: # $cmd - the actual keyword that invoked us.
6597: # $tail - the tail of the request that invoked us.
6598: # $replyfd- File descriptor connected to the client
6599: # $must_encode - True if the request must be encoded to be good.
6600: # $client_ok - True if it's ok for a client to request this.
6601: # $manager_ok - True if it's ok for a manager to request this.
6602: # Side effects:
6603: # - On success, the Dispatcher hash has an entry added for the key $RequestName
6604: # - On failure, the program will die as it's a bad internal bug to try to
6605: # register a duplicate command handler.
6606: #
6607: sub register_handler {
6608: my ($request_name,$procedure,$must_encode, $client_ok,$manager_ok) = @_;
6609:
6610: # Don't allow duplication#
6611:
6612: if (defined $Dispatcher{$request_name}) {
6613: die "Attempting to define a duplicate request handler for $request_name\n";
6614: }
6615: # Build the client type mask:
6616:
6617: my $client_type_mask = 0;
6618: if($client_ok) {
6619: $client_type_mask |= $CLIENT_OK;
6620: }
6621: if($manager_ok) {
6622: $client_type_mask |= $MANAGER_OK;
6623: }
6624:
6625: # Enter the hash:
6626:
6627: my @entry = ($procedure, $must_encode, $client_type_mask);
6628:
6629: $Dispatcher{$request_name} = \@entry;
6630:
6631: }
6632:
6633:
6634: #------------------------------------------------------------------
6635:
6636:
6637:
6638:
6639: #
6640: # Convert an error return code from lcpasswd to a string value.
6641: #
6642: sub lcpasswdstrerror {
6643: my $ErrorCode = shift;
6644: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
6645: return "lcpasswd Unrecognized error return value ".$ErrorCode;
6646: } else {
6647: return $passwderrors[$ErrorCode];
6648: }
6649: }
6650:
6651: # grabs exception and records it to log before exiting
6652: sub catchexception {
6653: my ($error)=@_;
6654: $SIG{'QUIT'}='DEFAULT';
6655: $SIG{__DIE__}='DEFAULT';
6656: &status("Catching exception");
6657: &logthis("<font color='red'>CRITICAL: "
6658: ."ABNORMAL EXIT. Child $$ for server ".$perlvar{'lonHostID'}." died through "
6659: ."a crash with this error msg->[$error]</font>");
6660: &logthis('Famous last words: '.$status.' - '.$lastlog);
6661: if ($client) { print $client "error: $error\n"; }
6662: $server->close();
6663: die($error);
6664: }
6665: sub timeout {
6666: &status("Handling Timeout");
6667: &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
6668: &catchexception('Timeout');
6669: }
6670: # -------------------------------- Set signal handlers to record abnormal exits
6671:
6672:
6673: $SIG{'QUIT'}=\&catchexception;
6674: $SIG{__DIE__}=\&catchexception;
6675:
6676: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
6677: &status("Read loncapa.conf and loncapa_apache.conf");
6678: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
6679: %perlvar=%{$perlvarref};
6680: undef $perlvarref;
6681:
6682: # ----------------------------- Make sure this process is running from user=www
6683: my $wwwid=getpwnam('www');
6684: if ($wwwid!=$<) {
6685: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
6686: my $subj="LON: $currenthostid User ID mismatch";
6687: system("echo 'User ID mismatch. lond must be run as user www.' |\
6688: mailto $emailto -s '$subj' > /dev/null");
6689: exit 1;
6690: }
6691:
6692: # --------------------------------------------- Check if other instance running
6693:
6694: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
6695:
6696: if (-e $pidfile) {
6697: my $lfh=IO::File->new("$pidfile");
6698: my $pide=<$lfh>;
6699: chomp($pide);
6700: if (kill 0 => $pide) { die "already running"; }
6701: }
6702:
6703: # ------------------------------------------------------------- Read hosts file
6704:
6705:
6706:
6707: # establish SERVER socket, bind and listen.
6708: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
6709: Type => SOCK_STREAM,
6710: Proto => 'tcp',
6711: ReuseAddr => 1,
6712: Listen => 10 )
6713: or die "making socket: $@\n";
6714:
6715: # --------------------------------------------------------- Do global variables
6716:
6717: # global variables
6718:
6719: my %children = (); # keys are current child process IDs
6720:
6721: sub REAPER { # takes care of dead children
6722: $SIG{CHLD} = \&REAPER;
6723: &status("Handling child death");
6724: my $pid;
6725: do {
6726: $pid = waitpid(-1,&WNOHANG());
6727: if (defined($children{$pid})) {
6728: &logthis("Child $pid died");
6729: delete($children{$pid});
6730: } elsif ($pid > 0) {
6731: &logthis("Unknown Child $pid died");
6732: }
6733: } while ( $pid > 0 );
6734: foreach my $child (keys(%children)) {
6735: $pid = waitpid($child,&WNOHANG());
6736: if ($pid > 0) {
6737: &logthis("Child $child - $pid looks like we missed it's death");
6738: delete($children{$pid});
6739: }
6740: }
6741: &status("Finished Handling child death");
6742: }
6743:
6744: sub HUNTSMAN { # signal handler for SIGINT
6745: &status("Killing children (INT)");
6746: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
6747: kill 'INT' => keys %children;
6748: &logthis("Free socket: ".shutdown($server,2)); # free up socket
6749: my $execdir=$perlvar{'lonDaemons'};
6750: unlink("$execdir/logs/lond.pid");
6751: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
6752: &status("Done killing children");
6753: exit; # clean up with dignity
6754: }
6755:
6756: sub HUPSMAN { # signal handler for SIGHUP
6757: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
6758: &status("Killing children for restart (HUP)");
6759: kill 'INT' => keys %children;
6760: &logthis("Free socket: ".shutdown($server,2)); # free up socket
6761: &logthis("<font color='red'>CRITICAL: Restarting</font>");
6762: my $execdir=$perlvar{'lonDaemons'};
6763: unlink("$execdir/logs/lond.pid");
6764: &status("Restarting self (HUP)");
6765: exec("$execdir/lond"); # here we go again
6766: }
6767:
6768: #
6769: # Reload the Apache daemon's state.
6770: # This is done by invoking /home/httpd/perl/apachereload
6771: # a setuid perl script that can be root for us to do this job.
6772: #
6773: sub ReloadApache {
6774: # --------------------------- Handle case of another apachereload process (locking)
6775: if (&LONCAPA::try_to_lock('/tmp/lock_apachereload')) {
6776: my $execdir = $perlvar{'lonDaemons'};
6777: my $script = $execdir."/apachereload";
6778: system($script);
6779: unlink('/tmp/lock_apachereload'); # Remove the lock file.
6780: }
6781: }
6782:
6783: #
6784: # Called in response to a USR2 signal.
6785: # - Reread hosts.tab
6786: # - All children connected to hosts that were removed from hosts.tab
6787: # are killed via SIGINT
6788: # - All children connected to previously existing hosts are sent SIGUSR1
6789: # - Our internal hosts hash is updated to reflect the new contents of
6790: # hosts.tab causing connections from hosts added to hosts.tab to
6791: # now be honored.
6792: #
6793: sub UpdateHosts {
6794: &status("Reload hosts.tab");
6795: logthis('<font color="blue"> Updating connections </font>');
6796: #
6797: # The %children hash has the set of IP's we currently have children
6798: # on. These need to be matched against records in the hosts.tab
6799: # Any ip's no longer in the table get killed off they correspond to
6800: # either dropped or changed hosts. Note that the re-read of the table
6801: # will take care of new and changed hosts as connections come into being.
6802:
6803: &Apache::lonnet::reset_hosts_info();
6804:
6805: foreach my $child (keys(%children)) {
6806: my $childip = $children{$child};
6807: if ($childip ne '127.0.0.1'
6808: && !defined(&Apache::lonnet::get_hosts_from_ip($childip))) {
6809: logthis('<font color="blue"> UpdateHosts killing child '
6810: ." $child for ip $childip </font>");
6811: kill('INT', $child);
6812: } else {
6813: logthis('<font color="green"> keeping child for ip '
6814: ." $childip (pid=$child) </font>");
6815: }
6816: }
6817: ReloadApache;
6818: &status("Finished reloading hosts.tab");
6819: }
6820:
6821:
6822: sub checkchildren {
6823: &status("Checking on the children (sending signals)");
6824: &initnewstatus();
6825: &logstatus();
6826: &logthis('Going to check on the children');
6827: my $docdir=$perlvar{'lonDocRoot'};
6828: foreach (sort keys %children) {
6829: #sleep 1;
6830: unless (kill 'USR1' => $_) {
6831: &logthis ('Child '.$_.' is dead');
6832: &logstatus($$.' is dead');
6833: delete($children{$_});
6834: }
6835: }
6836: sleep 5;
6837: $SIG{ALRM} = sub { Debug("timeout");
6838: die "timeout"; };
6839: $SIG{__DIE__} = 'DEFAULT';
6840: &status("Checking on the children (waiting for reports)");
6841: foreach (sort keys %children) {
6842: unless (-e "$docdir/lon-status/londchld/$_.txt") {
6843: eval {
6844: alarm(300);
6845: &logthis('Child '.$_.' did not respond');
6846: kill 9 => $_;
6847: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
6848: #$subj="LON: $currenthostid killed lond process $_";
6849: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
6850: #$execdir=$perlvar{'lonDaemons'};
6851: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
6852: delete($children{$_});
6853: alarm(0);
6854: }
6855: }
6856: }
6857: $SIG{ALRM} = 'DEFAULT';
6858: $SIG{__DIE__} = \&catchexception;
6859: &status("Finished checking children");
6860: &logthis('Finished Checking children');
6861: }
6862:
6863: # --------------------------------------------------------------------- Logging
6864:
6865: sub logthis {
6866: my $message=shift;
6867: my $execdir=$perlvar{'lonDaemons'};
6868: my $fh=IO::File->new(">>$execdir/logs/lond.log");
6869: my $now=time;
6870: my $local=localtime($now);
6871: $lastlog=$local.': '.$message;
6872: print $fh "$local ($$): $message\n";
6873: }
6874:
6875: # ------------------------- Conditional log if $DEBUG true.
6876: sub Debug {
6877: my $message = shift;
6878: if($DEBUG) {
6879: &logthis($message);
6880: }
6881: }
6882:
6883: #
6884: # Sub to do replies to client.. this gives a hook for some
6885: # debug tracing too:
6886: # Parameters:
6887: # fd - File open on client.
6888: # reply - Text to send to client.
6889: # request - Original request from client.
6890: #
6891: #NOTE $reply must be terminated by exactly *one* \n. If $reply is a reference
6892: #this is done automatically ($$reply must not contain any \n in this case).
6893: #If $reply is a string the caller has to ensure this.
6894: sub Reply {
6895: my ($fd, $reply, $request) = @_;
6896: if (ref($reply)) {
6897: print $fd $$reply;
6898: print $fd "\n";
6899: if ($DEBUG) { Debug("Request was $request Reply was $$reply"); }
6900: } else {
6901: print $fd $reply;
6902: if ($DEBUG) { Debug("Request was $request Reply was $reply"); }
6903: }
6904: $Transactions++;
6905: }
6906:
6907:
6908: #
6909: # Sub to report a failure.
6910: # This function:
6911: # - Increments the failure statistic counters.
6912: # - Invokes Reply to send the error message to the client.
6913: # Parameters:
6914: # fd - File descriptor open on the client
6915: # reply - Reply text to emit.
6916: # request - The original request message (used by Reply
6917: # to debug if that's enabled.
6918: # Implicit outputs:
6919: # $Failures- The number of failures is incremented.
6920: # Reply (invoked here) sends a message to the
6921: # client:
6922: #
6923: sub Failure {
6924: my $fd = shift;
6925: my $reply = shift;
6926: my $request = shift;
6927:
6928: $Failures++;
6929: Reply($fd, $reply, $request); # That's simple eh?
6930: }
6931: # ------------------------------------------------------------------ Log status
6932:
6933: sub logstatus {
6934: &status("Doing logging");
6935: my $docdir=$perlvar{'lonDocRoot'};
6936: {
6937: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
6938: print $fh $status."\n".$lastlog."\n".time."\n$keymode";
6939: $fh->close();
6940: }
6941: &status("Finished $$.txt");
6942: {
6943: open(LOG,">>$docdir/lon-status/londstatus.txt");
6944: flock(LOG,LOCK_EX);
6945: print LOG $$."\t".$clientname."\t".$currenthostid."\t"
6946: .$status."\t".$lastlog."\t $keymode\n";
6947: flock(LOG,LOCK_UN);
6948: close(LOG);
6949: }
6950: &status("Finished logging");
6951: }
6952:
6953: sub initnewstatus {
6954: my $docdir=$perlvar{'lonDocRoot'};
6955: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
6956: my $now=time();
6957: my $local=localtime($now);
6958: print $fh "LOND status $local - parent $$\n\n";
6959: opendir(DIR,"$docdir/lon-status/londchld");
6960: while (my $filename=readdir(DIR)) {
6961: unlink("$docdir/lon-status/londchld/$filename");
6962: }
6963: closedir(DIR);
6964: }
6965:
6966: # -------------------------------------------------------------- Status setting
6967:
6968: sub status {
6969: my $what=shift;
6970: my $now=time;
6971: my $local=localtime($now);
6972: $status=$local.': '.$what;
6973: $0='lond: '.$what.' '.$local;
6974: }
6975:
6976: # -------------------------------------------------------------- Talk to lonsql
6977:
6978: sub sql_reply {
6979: my ($cmd)=@_;
6980: my $answer=&sub_sql_reply($cmd);
6981: if ($answer eq 'con_lost') { $answer=&sub_sql_reply($cmd); }
6982: return $answer;
6983: }
6984:
6985: sub sub_sql_reply {
6986: my ($cmd)=@_;
6987: my $unixsock="mysqlsock";
6988: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
6989: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
6990: Type => SOCK_STREAM,
6991: Timeout => 10)
6992: or return "con_lost";
6993: print $sclient "$cmd:$currentdomainid\n";
6994: my $answer=<$sclient>;
6995: chomp($answer);
6996: if (!$answer) { $answer="con_lost"; }
6997: return $answer;
6998: }
6999:
7000: # --------------------------------------- Is this the home server of an author?
7001:
7002: sub ishome {
7003: my $author=shift;
7004: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
7005: my ($udom,$uname)=split(/\//,$author);
7006: my $proname=propath($udom,$uname);
7007: if (-e $proname) {
7008: return 'owner';
7009: } else {
7010: return 'not_owner';
7011: }
7012: }
7013:
7014: # ======================================================= Continue main program
7015: # ---------------------------------------------------- Fork once and dissociate
7016:
7017: my $fpid=fork;
7018: exit if $fpid;
7019: die "Couldn't fork: $!" unless defined ($fpid);
7020:
7021: POSIX::setsid() or die "Can't start new session: $!";
7022:
7023: # ------------------------------------------------------- Write our PID on disk
7024:
7025: my $execdir=$perlvar{'lonDaemons'};
7026: open (PIDSAVE,">$execdir/logs/lond.pid");
7027: print PIDSAVE "$$\n";
7028: close(PIDSAVE);
7029: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
7030: &status('Starting');
7031:
7032:
7033:
7034: # ----------------------------------------------------- Install signal handlers
7035:
7036:
7037: $SIG{CHLD} = \&REAPER;
7038: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
7039: $SIG{HUP} = \&HUPSMAN;
7040: $SIG{USR1} = \&checkchildren;
7041: $SIG{USR2} = \&UpdateHosts;
7042:
7043: # Read the host hashes:
7044: &Apache::lonnet::load_hosts_tab();
7045: my %iphost = &Apache::lonnet::get_iphost(1);
7046:
7047: $dist=`$perlvar{'lonDaemons'}/distprobe`;
7048:
7049: my $arch = `uname -i`;
7050: chomp($arch);
7051: if ($arch eq 'unknown') {
7052: $arch = `uname -m`;
7053: chomp($arch);
7054: }
7055:
7056: # --------------------------------------------------------------
7057: # Accept connections. When a connection comes in, it is validated
7058: # and if good, a child process is created to process transactions
7059: # along the connection.
7060:
7061: while (1) {
7062: &status('Starting accept');
7063: $client = $server->accept() or next;
7064: &status('Accepted '.$client.' off to spawn');
7065: make_new_child($client);
7066: &status('Finished spawning');
7067: }
7068:
7069: sub make_new_child {
7070: my $pid;
7071: # my $cipher; # Now global
7072: my $sigset;
7073:
7074: $client = shift;
7075: &status('Starting new child '.$client);
7076: &logthis('<font color="green"> Attempting to start child ('.$client.
7077: ")</font>");
7078: # block signal for fork
7079: $sigset = POSIX::SigSet->new(SIGINT);
7080: sigprocmask(SIG_BLOCK, $sigset)
7081: or die "Can't block SIGINT for fork: $!\n";
7082:
7083: die "fork: $!" unless defined ($pid = fork);
7084:
7085: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
7086: # connection liveness.
7087:
7088: #
7089: # Figure out who we're talking to so we can record the peer in
7090: # the pid hash.
7091: #
7092: my $caller = getpeername($client);
7093: my ($port,$iaddr);
7094: if (defined($caller) && length($caller) > 0) {
7095: ($port,$iaddr)=unpack_sockaddr_in($caller);
7096: } else {
7097: &logthis("Unable to determine who caller was, getpeername returned nothing");
7098: }
7099: if (defined($iaddr)) {
7100: $clientip = inet_ntoa($iaddr);
7101: Debug("Connected with $clientip");
7102: } else {
7103: &logthis("Unable to determine clientip");
7104: $clientip='Unavailable';
7105: }
7106:
7107: if ($pid) {
7108: # Parent records the child's birth and returns.
7109: sigprocmask(SIG_UNBLOCK, $sigset)
7110: or die "Can't unblock SIGINT for fork: $!\n";
7111: $children{$pid} = $clientip;
7112: &status('Started child '.$pid);
7113: close($client);
7114: return;
7115: } else {
7116: # Child can *not* return from this subroutine.
7117: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
7118: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
7119: #don't get intercepted
7120: $SIG{USR1}= \&logstatus;
7121: $SIG{ALRM}= \&timeout;
7122: #
7123: # Block sigpipe as it gets thrownon socket disconnect and we want to
7124: # deal with that as a read faiure instead.
7125: #
7126: my $blockset = POSIX::SigSet->new(SIGPIPE);
7127: sigprocmask(SIG_BLOCK, $blockset);
7128:
7129: $lastlog='Forked ';
7130: $status='Forked';
7131:
7132: # unblock signals
7133: sigprocmask(SIG_UNBLOCK, $sigset)
7134: or die "Can't unblock SIGINT for fork: $!\n";
7135:
7136: # my $tmpsnum=0; # Now global
7137: #---------------------------------------------------- kerberos 5 initialization
7138: &Authen::Krb5::init_context();
7139:
7140: my $no_ets;
7141: if ($dist =~ /^(?:centos|rhes|scientific)(\d+)$/) {
7142: if ($1 >= 7) {
7143: $no_ets = 1;
7144: }
7145: } elsif ($dist =~ /^suse(\d+\.\d+)$/) {
7146: if (($1 eq '9.3') || ($1 >= 12.2)) {
7147: $no_ets = 1;
7148: }
7149: } elsif ($dist =~ /^sles(\d+)$/) {
7150: if ($1 > 11) {
7151: $no_ets = 1;
7152: }
7153: } elsif ($dist =~ /^fedora(\d+)$/) {
7154: if ($1 < 7) {
7155: $no_ets = 1;
7156: }
7157: }
7158: unless ($no_ets) {
7159: &Authen::Krb5::init_ets();
7160: }
7161:
7162: &status('Accepted connection');
7163: # =============================================================================
7164: # do something with the connection
7165: # -----------------------------------------------------------------------------
7166: # see if we know client and 'check' for spoof IP by ineffective challenge
7167:
7168: my $outsideip=$clientip;
7169: if ($clientip eq '127.0.0.1') {
7170: $outsideip=&Apache::lonnet::get_host_ip($perlvar{'lonHostID'});
7171: }
7172: &ReadManagerTable();
7173: my $clientrec=defined(&Apache::lonnet::get_hosts_from_ip($outsideip));
7174: my $ismanager=($managers{$outsideip} ne undef);
7175: $clientname = "[unknown]";
7176: if($clientrec) { # Establish client type.
7177: $ConnectionType = "client";
7178: $clientname = (&Apache::lonnet::get_hosts_from_ip($outsideip))[-1];
7179: if($ismanager) {
7180: $ConnectionType = "both";
7181: }
7182: } else {
7183: $ConnectionType = "manager";
7184: $clientname = $managers{$outsideip};
7185: }
7186: my $clientok;
7187:
7188: if ($clientrec || $ismanager) {
7189: &status("Waiting for init from $clientip $clientname");
7190: &logthis('<font color="yellow">INFO: Connection, '.
7191: $clientip.
7192: " ($clientname) connection type = $ConnectionType </font>" );
7193: &status("Connecting $clientip ($clientname))");
7194: my $remotereq=<$client>;
7195: chomp($remotereq);
7196: Debug("Got init: $remotereq");
7197:
7198: if ($remotereq =~ /^init/) {
7199: &sethost("sethost:$perlvar{'lonHostID'}");
7200: #
7201: # If the remote is attempting a local init... give that a try:
7202: #
7203: (my $i, my $inittype, $clientversion) = split(/:/, $remotereq);
7204: # For LON-CAPA 2.9, the client session will have sent its LON-CAPA
7205: # version when initiating the connection. For LON-CAPA 2.8 and older,
7206: # the version is retrieved from the global %loncaparevs in lonnet.pm.
7207: # $clientversion contains path to keyfile if $inittype eq 'local'
7208: # it's overridden below in this case
7209: $clientversion ||= $Apache::lonnet::loncaparevs{$clientname};
7210:
7211: # If the connection type is ssl, but I didn't get my
7212: # certificate files yet, then I'll drop back to
7213: # insecure (if allowed).
7214:
7215: if($inittype eq "ssl") {
7216: my ($ca, $cert) = lonssl::CertificateFile;
7217: my $kfile = lonssl::KeyFile;
7218: if((!$ca) ||
7219: (!$cert) ||
7220: (!$kfile)) {
7221: $inittype = ""; # This forces insecure attempt.
7222: &logthis("<font color=\"blue\"> Certificates not "
7223: ."installed -- trying insecure auth</font>");
7224: } else { # SSL certificates are in place so
7225: } # Leave the inittype alone.
7226: }
7227:
7228: if($inittype eq "local") {
7229: $clientversion = $perlvar{'lonVersion'};
7230: my $key = LocalConnection($client, $remotereq);
7231: if($key) {
7232: Debug("Got local key $key");
7233: $clientok = 1;
7234: my $cipherkey = pack("H32", $key);
7235: $cipher = new IDEA($cipherkey);
7236: print $client "ok:local\n";
7237: &logthis('<font color="green">'
7238: . "Successful local authentication </font>");
7239: $keymode = "local"
7240: } else {
7241: Debug("Failed to get local key");
7242: $clientok = 0;
7243: shutdown($client, 3);
7244: close $client;
7245: }
7246: } elsif ($inittype eq "ssl") {
7247: my $key = SSLConnection($client);
7248: if ($key) {
7249: $clientok = 1;
7250: my $cipherkey = pack("H32", $key);
7251: $cipher = new IDEA($cipherkey);
7252: &logthis('<font color="green">'
7253: ."Successfull ssl authentication with $clientname </font>");
7254: $keymode = "ssl";
7255:
7256: } else {
7257: $clientok = 0;
7258: close $client;
7259: }
7260:
7261: } else {
7262: my $ok = InsecureConnection($client);
7263: if($ok) {
7264: $clientok = 1;
7265: &logthis('<font color="green">'
7266: ."Successful insecure authentication with $clientname </font>");
7267: print $client "ok\n";
7268: $keymode = "insecure";
7269: } else {
7270: &logthis('<font color="yellow">'
7271: ."Attempted insecure connection disallowed </font>");
7272: close $client;
7273: $clientok = 0;
7274:
7275: }
7276: }
7277: } else {
7278: &logthis(
7279: "<font color='blue'>WARNING: "
7280: ."$clientip failed to initialize: >$remotereq< </font>");
7281: &status('No init '.$clientip);
7282: }
7283:
7284: } else {
7285: &logthis(
7286: "<font color='blue'>WARNING: Unknown client $clientip</font>");
7287: &status('Hung up on '.$clientip);
7288: }
7289:
7290: if ($clientok) {
7291: # ---------------- New known client connecting, could mean machine online again
7292: if (&Apache::lonnet::get_host_ip($currenthostid) ne $clientip
7293: && $clientip ne '127.0.0.1') {
7294: &Apache::lonnet::reconlonc($clientname);
7295: }
7296: &logthis("<font color='green'>Established connection: $clientname</font>");
7297: &status('Will listen to '.$clientname);
7298: # ------------------------------------------------------------ Process requests
7299: my $keep_going = 1;
7300: my $user_input;
7301: my $clienthost = &Apache::lonnet::hostname($clientname);
7302: my $clientserverhomeID = &Apache::lonnet::get_server_homeID($clienthost);
7303: $clienthomedom = &Apache::lonnet::host_domain($clientserverhomeID);
7304: $clientintdom = &Apache::lonnet::internet_dom($clientserverhomeID);
7305: $clientsameinst = 0;
7306: if ($clientintdom ne '') {
7307: my $internet_names = &Apache::lonnet::get_internet_names($currenthostid);
7308: if (ref($internet_names) eq 'ARRAY') {
7309: if (grep(/^\Q$clientintdom\E$/,@{$internet_names})) {
7310: $clientsameinst = 1;
7311: }
7312: }
7313: }
7314: $clientremoteok = 0;
7315: unless ($clientsameinst) {
7316: $clientremoteok = 1;
7317: my $defdom = &Apache::lonnet::host_domain($perlvar{'lonHostID'});
7318: %clientprohibited = &get_prohibited($defdom);
7319: if ($clientintdom) {
7320: my $remsessconf = &get_usersession_config($defdom,'remotesession');
7321: if (ref($remsessconf) eq 'HASH') {
7322: if (ref($remsessconf->{'remote'}) eq 'HASH') {
7323: if (ref($remsessconf->{'remote'}->{'excludedomain'}) eq 'ARRAY') {
7324: if (grep(/^\Q$clientintdom\E$/,@{$remsessconf->{'remote'}->{'excludedomain'}})) {
7325: $clientremoteok = 0;
7326: }
7327: }
7328: if (ref($remsessconf->{'remote'}->{'includedomain'}) eq 'ARRAY') {
7329: if (grep(/^\Q$clientintdom\E$/,@{$remsessconf->{'remote'}->{'includedomain'}})) {
7330: $clientremoteok = 1;
7331: } else {
7332: $clientremoteok = 0;
7333: }
7334: }
7335: }
7336: }
7337: }
7338: }
7339: while(($user_input = get_request) && $keep_going) {
7340: alarm(120);
7341: Debug("Main: Got $user_input\n");
7342: $keep_going = &process_request($user_input);
7343: alarm(0);
7344: &status('Listening to '.$clientname." ($keymode)");
7345: }
7346:
7347: # --------------------------------------------- client unknown or fishy, refuse
7348: } else {
7349: print $client "refused\n";
7350: $client->close();
7351: &logthis("<font color='blue'>WARNING: "
7352: ."Rejected client $clientip, closing connection</font>");
7353: }
7354: }
7355:
7356: # =============================================================================
7357:
7358: &logthis("<font color='red'>CRITICAL: "
7359: ."Disconnect from $clientip ($clientname)</font>");
7360:
7361:
7362: # this exit is VERY important, otherwise the child will become
7363: # a producer of more and more children, forking yourself into
7364: # process death.
7365: exit;
7366:
7367: }
7368: #
7369: # Determine if a user is an author for the indicated domain.
7370: #
7371: # Parameters:
7372: # domain - domain to check in .
7373: # user - Name of user to check.
7374: #
7375: # Return:
7376: # 1 - User is an author for domain.
7377: # 0 - User is not an author for domain.
7378: sub is_author {
7379: my ($domain, $user) = @_;
7380:
7381: &Debug("is_author: $user @ $domain");
7382:
7383: my $hashref = &tie_user_hash($domain, $user, "roles",
7384: &GDBM_READER());
7385:
7386: # Author role should show up as a key /domain/_au
7387:
7388: my $value;
7389: if ($hashref) {
7390:
7391: my $key = "/$domain/_au";
7392: if (defined($hashref)) {
7393: $value = $hashref->{$key};
7394: if(!untie_user_hash($hashref)) {
7395: return 'error: ' . ($!+0)." untie (GDBM) Failed";
7396: }
7397: }
7398:
7399: if(defined($value)) {
7400: &Debug("$user @ $domain is an author");
7401: }
7402: } else {
7403: return 'error: '.($!+0)." tie (GDBM) Failed";
7404: }
7405:
7406: return defined($value);
7407: }
7408: #
7409: # Checks to see if the input roleput request was to set
7410: # an author role. If so, creates construction space
7411: # Parameters:
7412: # request - The request sent to the rolesput subchunk.
7413: # We're looking for /domain/_au
7414: # domain - The domain in which the user is having roles doctored.
7415: # user - Name of the user for which the role is being put.
7416: # authtype - The authentication type associated with the user.
7417: #
7418: sub manage_permissions {
7419: my ($request, $domain, $user, $authtype) = @_;
7420: # See if the request is of the form /$domain/_au
7421: if($request =~ /^(\/\Q$domain\E\/_au)$/) { # It's an author rolesput...
7422: my $path=$perlvar{'lonDocRoot'}."/priv/$domain";
7423: unless (-e $path) {
7424: mkdir($path);
7425: }
7426: unless (-e $path.'/'.$user) {
7427: mkdir($path.'/'.$user);
7428: }
7429: }
7430: }
7431:
7432:
7433: #
7434: # Return the full path of a user password file, whether it exists or not.
7435: # Parameters:
7436: # domain - Domain in which the password file lives.
7437: # user - name of the user.
7438: # Returns:
7439: # Full passwd path:
7440: #
7441: sub password_path {
7442: my ($domain, $user) = @_;
7443: return &propath($domain, $user).'/passwd';
7444: }
7445:
7446: # Password Filename
7447: # Returns the path to a passwd file given domain and user... only if
7448: # it exists.
7449: # Parameters:
7450: # domain - Domain in which to search.
7451: # user - username.
7452: # Returns:
7453: # - If the password file exists returns its path.
7454: # - If the password file does not exist, returns undefined.
7455: #
7456: sub password_filename {
7457: my ($domain, $user) = @_;
7458:
7459: Debug ("PasswordFilename called: dom = $domain user = $user");
7460:
7461: my $path = &password_path($domain, $user);
7462: Debug("PasswordFilename got path: $path");
7463: if(-e $path) {
7464: return $path;
7465: } else {
7466: return undef;
7467: }
7468: }
7469:
7470: #
7471: # Rewrite the contents of the user's passwd file.
7472: # Parameters:
7473: # domain - domain of the user.
7474: # name - User's name.
7475: # contents - New contents of the file.
7476: # Returns:
7477: # 0 - Failed.
7478: # 1 - Success.
7479: #
7480: sub rewrite_password_file {
7481: my ($domain, $user, $contents) = @_;
7482:
7483: my $file = &password_filename($domain, $user);
7484: if (defined $file) {
7485: my $pf = IO::File->new(">$file");
7486: if($pf) {
7487: print $pf "$contents\n";
7488: return 1;
7489: } else {
7490: return 0;
7491: }
7492: } else {
7493: return 0;
7494: }
7495:
7496: }
7497:
7498: #
7499: # get_auth_type - Determines the authorization type of a user in a domain.
7500:
7501: # Returns the authorization type or nouser if there is no such user.
7502: #
7503: sub get_auth_type {
7504: my ($domain, $user) = @_;
7505:
7506: Debug("get_auth_type( $domain, $user ) \n");
7507: my $proname = &propath($domain, $user);
7508: my $passwdfile = "$proname/passwd";
7509: if( -e $passwdfile ) {
7510: my $pf = IO::File->new($passwdfile);
7511: my $realpassword = <$pf>;
7512: chomp($realpassword);
7513: Debug("Password info = $realpassword\n");
7514: my ($authtype, $contentpwd) = split(/:/, $realpassword);
7515: Debug("Authtype = $authtype, content = $contentpwd\n");
7516: return "$authtype:$contentpwd";
7517: } else {
7518: Debug("Returning nouser");
7519: return "nouser";
7520: }
7521: }
7522:
7523: #
7524: # Validate a user given their domain, name and password. This utility
7525: # function is used by both AuthenticateHandler and ChangePasswordHandler
7526: # to validate the login credentials of a user.
7527: # Parameters:
7528: # $domain - The domain being logged into (this is required due to
7529: # the capability for multihomed systems.
7530: # $user - The name of the user being validated.
7531: # $password - The user's propoposed password.
7532: #
7533: # Returns:
7534: # 1 - The domain,user,pasword triplet corresponds to a valid
7535: # user.
7536: # 0 - The domain,user,password triplet is not a valid user.
7537: #
7538: sub validate_user {
7539: my ($domain, $user, $password, $checkdefauth) = @_;
7540:
7541: # Why negative ~pi you may well ask? Well this function is about
7542: # authentication, and therefore very important to get right.
7543: # I've initialized the flag that determines whether or not I've
7544: # validated correctly to a value it's not supposed to get.
7545: # At the end of this function. I'll ensure that it's not still that
7546: # value so we don't just wind up returning some accidental value
7547: # as a result of executing an unforseen code path that
7548: # did not set $validated. At the end of valid execution paths,
7549: # validated shoule be 1 for success or 0 for failuer.
7550:
7551: my $validated = -3.14159;
7552:
7553: # How we authenticate is determined by the type of authentication
7554: # the user has been assigned. If the authentication type is
7555: # "nouser", the user does not exist so we will return 0.
7556:
7557: my $contents = &get_auth_type($domain, $user);
7558: my ($howpwd, $contentpwd) = split(/:/, $contents);
7559:
7560: my $null = pack("C",0); # Used by kerberos auth types.
7561:
7562: if ($howpwd eq 'nouser') {
7563: if ($checkdefauth) {
7564: my %domdefaults = &Apache::lonnet::get_domain_defaults($domain);
7565: if ($domdefaults{'auth_def'} eq 'localauth') {
7566: $howpwd = $domdefaults{'auth_def'};
7567: $contentpwd = $domdefaults{'auth_arg_def'};
7568: } elsif ((($domdefaults{'auth_def'} eq 'krb4') ||
7569: ($domdefaults{'auth_def'} eq 'krb5')) &&
7570: ($domdefaults{'auth_arg_def'} ne '')) {
7571: $howpwd = $domdefaults{'auth_def'};
7572: $contentpwd = $domdefaults{'auth_arg_def'};
7573: }
7574: }
7575: }
7576: if ($howpwd ne 'nouser') {
7577: if($howpwd eq "internal") { # Encrypted is in local password file.
7578: if (length($contentpwd) == 13) {
7579: $validated = (crypt($password,$contentpwd) eq $contentpwd);
7580: if ($validated) {
7581: my $ncpass = &hash_passwd($domain,$password);
7582: if (&rewrite_password_file($domain,$user,"$howpwd:$ncpass")) {
7583: &update_passwd_history($user,$domain,$howpwd,'conversion');
7584: &logthis("Validated password hashed with bcrypt for $user:$domain");
7585: }
7586: }
7587: } else {
7588: $validated = &check_internal_passwd($password,$contentpwd,$domain);
7589: }
7590: }
7591: elsif ($howpwd eq "unix") { # User is a normal unix user.
7592: $contentpwd = (getpwnam($user))[1];
7593: if($contentpwd) {
7594: if($contentpwd eq 'x') { # Shadow password file...
7595: my $pwauth_path = "/usr/local/sbin/pwauth";
7596: open PWAUTH, "|$pwauth_path" or
7597: die "Cannot invoke authentication";
7598: print PWAUTH "$user\n$password\n";
7599: close PWAUTH;
7600: $validated = ! $?;
7601:
7602: } else { # Passwords in /etc/passwd.
7603: $validated = (crypt($password,
7604: $contentpwd) eq $contentpwd);
7605: }
7606: } else {
7607: $validated = 0;
7608: }
7609: } elsif ($howpwd eq "krb4") { # user is in kerberos 4 auth. domain.
7610: my $checkwithkrb5 = 0;
7611: if ($dist =~/^fedora(\d+)$/) {
7612: if ($1 > 11) {
7613: $checkwithkrb5 = 1;
7614: }
7615: } elsif ($dist =~ /^suse([\d.]+)$/) {
7616: if ($1 > 11.1) {
7617: $checkwithkrb5 = 1;
7618: }
7619: }
7620: if ($checkwithkrb5) {
7621: $validated = &krb5_authen($password,$null,$user,$contentpwd);
7622: } else {
7623: $validated = &krb4_authen($password,$null,$user,$contentpwd);
7624: }
7625: } elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain.
7626: $validated = &krb5_authen($password,$null,$user,$contentpwd);
7627: } elsif ($howpwd eq "localauth") {
7628: # Authenticate via installation specific authentcation method:
7629: $validated = &localauth::localauth($user,
7630: $password,
7631: $contentpwd,
7632: $domain);
7633: if ($validated < 0) {
7634: &logthis("localauth for $contentpwd $user:$domain returned a $validated");
7635: $validated = 0;
7636: }
7637: } else { # Unrecognized auth is also bad.
7638: $validated = 0;
7639: }
7640: } else {
7641: $validated = 0;
7642: }
7643: #
7644: # $validated has the correct stat of the authentication:
7645: #
7646:
7647: unless ($validated != -3.14159) {
7648: # I >really really< want to know if this happens.
7649: # since it indicates that user authentication is badly
7650: # broken in some code path.
7651: #
7652: die "ValidateUser - failed to set the value of validated $domain, $user $password";
7653: }
7654: return $validated;
7655: }
7656:
7657: sub check_internal_passwd {
7658: my ($plainpass,$stored,$domain) = @_;
7659: my (undef,$method,@rest) = split(/!/,$stored);
7660: if ($method eq "bcrypt") {
7661: my $result = &hash_passwd($domain,$plainpass,@rest);
7662: if ($result ne $stored) {
7663: return 0;
7664: }
7665: # Upgrade to a larger number of rounds if necessary
7666: my $defaultcost;
7667: my %domconfig =
7668: &Apache::lonnet::get_dom('configuration',['password'],$domain);
7669: if (ref($domconfig{'password'}) eq 'HASH') {
7670: $defaultcost = $domconfig{'password'}{'cost'};
7671: }
7672: if (($defaultcost eq '') || ($defaultcost =~ /D/)) {
7673: $defaultcost = 10;
7674: }
7675: return 1 unless($rest[0]<$defaultcost);
7676: }
7677: return 0;
7678: }
7679:
7680: sub get_last_authchg {
7681: my ($domain,$user) = @_;
7682: my $lastmod;
7683: my $logname = &propath($domain,$user).'/passwd.log';
7684: if (-e "$logname") {
7685: $lastmod = (stat("$logname"))[9];
7686: }
7687: return $lastmod;
7688: }
7689:
7690: sub krb4_authen {
7691: my ($password,$null,$user,$contentpwd) = @_;
7692: my $validated = 0;
7693: if (!($password =~ /$null/) ) { # Null password not allowed.
7694: eval {
7695: require Authen::Krb4;
7696: };
7697: if (!$@) {
7698: my $k4error = &Authen::Krb4::get_pw_in_tkt($user,
7699: "",
7700: $contentpwd,,
7701: 'krbtgt',
7702: $contentpwd,
7703: 1,
7704: $password);
7705: if(!$k4error) {
7706: $validated = 1;
7707: } else {
7708: $validated = 0;
7709: &logthis('krb4: '.$user.', '.$contentpwd.', '.
7710: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
7711: }
7712: } else {
7713: $validated = krb5_authen($password,$null,$user,$contentpwd);
7714: }
7715: }
7716: return $validated;
7717: }
7718:
7719: sub krb5_authen {
7720: my ($password,$null,$user,$contentpwd) = @_;
7721: my $validated = 0;
7722: if(!($password =~ /$null/)) { # Null password not allowed.
7723: my $krbclient = &Authen::Krb5::parse_name($user.'@'
7724: .$contentpwd);
7725: my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd;
7726: my $krbserver = &Authen::Krb5::parse_name($krbservice);
7727: my $credentials= &Authen::Krb5::cc_default();
7728: $credentials->initialize(&Authen::Krb5::parse_name($user.'@'
7729: .$contentpwd));
7730: my $krbreturn;
7731: if (exists(&Authen::Krb5::get_init_creds_password)) {
7732: $krbreturn =
7733: &Authen::Krb5::get_init_creds_password($krbclient,$password,
7734: $krbservice);
7735: $validated = (ref($krbreturn) eq 'Authen::Krb5::Creds');
7736: } else {
7737: $krbreturn =
7738: &Authen::Krb5::get_in_tkt_with_password($krbclient,$krbserver,
7739: $password,$credentials);
7740: $validated = ($krbreturn == 1);
7741: }
7742: if (!$validated) {
7743: &logthis('krb5: '.$user.', '.$contentpwd.', '.
7744: &Authen::Krb5::error());
7745: }
7746: }
7747: return $validated;
7748: }
7749:
7750: sub addline {
7751: my ($fname,$hostid,$ip,$newline)=@_;
7752: my $contents;
7753: my $found=0;
7754: my $expr='^'.quotemeta($hostid).':'.quotemeta($ip).':';
7755: my $sh;
7756: if ($sh=IO::File->new("$fname.subscription")) {
7757: while (my $subline=<$sh>) {
7758: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
7759: }
7760: $sh->close();
7761: }
7762: $sh=IO::File->new(">$fname.subscription");
7763: if ($contents) { print $sh $contents; }
7764: if ($newline) { print $sh $newline; }
7765: $sh->close();
7766: return $found;
7767: }
7768:
7769: sub get_chat {
7770: my ($cdom,$cname,$udom,$uname,$group)=@_;
7771:
7772: my @entries=();
7773: my $namespace = 'nohist_chatroom';
7774: my $namespace_inroom = 'nohist_inchatroom';
7775: if ($group ne '') {
7776: $namespace .= '_'.$group;
7777: $namespace_inroom .= '_'.$group;
7778: }
7779: my $hashref = &tie_user_hash($cdom, $cname, $namespace,
7780: &GDBM_READER());
7781: if ($hashref) {
7782: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
7783: &untie_user_hash($hashref);
7784: }
7785: my @participants=();
7786: my $cutoff=time-60;
7787: $hashref = &tie_user_hash($cdom, $cname, $namespace_inroom,
7788: &GDBM_WRCREAT());
7789: if ($hashref) {
7790: $hashref->{$uname.':'.$udom}=time;
7791: foreach my $user (sort(keys(%$hashref))) {
7792: if ($hashref->{$user}>$cutoff) {
7793: push(@participants, 'active_participant:'.$user);
7794: }
7795: }
7796: &untie_user_hash($hashref);
7797: }
7798: return (@participants,@entries);
7799: }
7800:
7801: sub chat_add {
7802: my ($cdom,$cname,$newchat,$group)=@_;
7803: my @entries=();
7804: my $time=time;
7805: my $namespace = 'nohist_chatroom';
7806: my $logfile = 'chatroom.log';
7807: if ($group ne '') {
7808: $namespace .= '_'.$group;
7809: $logfile = 'chatroom_'.$group.'.log';
7810: }
7811: my $hashref = &tie_user_hash($cdom, $cname, $namespace,
7812: &GDBM_WRCREAT());
7813: if ($hashref) {
7814: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
7815: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
7816: my ($thentime,$idnum)=split(/\_/,$lastid);
7817: my $newid=$time.'_000000';
7818: if ($thentime==$time) {
7819: $idnum=~s/^0+//;
7820: $idnum++;
7821: $idnum=substr('000000'.$idnum,-6,6);
7822: $newid=$time.'_'.$idnum;
7823: }
7824: $hashref->{$newid}=$newchat;
7825: my $expired=$time-3600;
7826: foreach my $comment (keys(%$hashref)) {
7827: my ($thistime) = ($comment=~/(\d+)\_/);
7828: if ($thistime<$expired) {
7829: delete $hashref->{$comment};
7830: }
7831: }
7832: {
7833: my $proname=&propath($cdom,$cname);
7834: if (open(CHATLOG,">>$proname/$logfile")) {
7835: print CHATLOG ("$time:".&unescape($newchat)."\n");
7836: }
7837: close(CHATLOG);
7838: }
7839: &untie_user_hash($hashref);
7840: }
7841: }
7842:
7843: sub unsub {
7844: my ($fname,$clientip)=@_;
7845: my $result;
7846: my $unsubs = 0; # Number of successful unsubscribes:
7847:
7848:
7849: # An old way subscriptions were handled was to have a
7850: # subscription marker file:
7851:
7852: Debug("Attempting unlink of $fname.$clientname");
7853: if (unlink("$fname.$clientname")) {
7854: $unsubs++; # Successful unsub via marker file.
7855: }
7856:
7857: # The more modern way to do it is to have a subscription list
7858: # file:
7859:
7860: if (-e "$fname.subscription") {
7861: my $found=&addline($fname,$clientname,$clientip,'');
7862: if ($found) {
7863: $unsubs++;
7864: }
7865: }
7866:
7867: # If either or both of these mechanisms succeeded in unsubscribing a
7868: # resource we can return ok:
7869:
7870: if($unsubs) {
7871: $result = "ok\n";
7872: } else {
7873: $result = "not_subscribed\n";
7874: }
7875:
7876: return $result;
7877: }
7878:
7879: sub currentversion {
7880: my $fname=shift;
7881: my $version=-1;
7882: my $ulsdir='';
7883: if ($fname=~/^(.+)\/[^\/]+$/) {
7884: $ulsdir=$1;
7885: }
7886: my ($fnamere1,$fnamere2);
7887: # remove version if already specified
7888: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
7889: # get the bits that go before and after the version number
7890: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
7891: $fnamere1=$1;
7892: $fnamere2='.'.$2;
7893: }
7894: if (-e $fname) { $version=1; }
7895: if (-e $ulsdir) {
7896: if(-d $ulsdir) {
7897: if (opendir(LSDIR,$ulsdir)) {
7898: my $ulsfn;
7899: while ($ulsfn=readdir(LSDIR)) {
7900: # see if this is a regular file (ignore links produced earlier)
7901: my $thisfile=$ulsdir.'/'.$ulsfn;
7902: unless (-l $thisfile) {
7903: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
7904: if ($1>$version) { $version=$1; }
7905: }
7906: }
7907: }
7908: closedir(LSDIR);
7909: $version++;
7910: }
7911: }
7912: }
7913: return $version;
7914: }
7915:
7916: sub thisversion {
7917: my $fname=shift;
7918: my $version=-1;
7919: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
7920: $version=$1;
7921: }
7922: return $version;
7923: }
7924:
7925: sub subscribe {
7926: my ($userinput,$clientip)=@_;
7927: my $result;
7928: my ($cmd,$fname)=split(/:/,$userinput,2);
7929: my $ownership=&ishome($fname);
7930: if ($ownership eq 'owner') {
7931: # explitly asking for the current version?
7932: unless (-e $fname) {
7933: my $currentversion=¤tversion($fname);
7934: if (&thisversion($fname)==$currentversion) {
7935: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
7936: my $root=$1;
7937: my $extension=$2;
7938: symlink($root.'.'.$extension,
7939: $root.'.'.$currentversion.'.'.$extension);
7940: unless ($extension=~/\.meta$/) {
7941: symlink($root.'.'.$extension.'.meta',
7942: $root.'.'.$currentversion.'.'.$extension.'.meta');
7943: }
7944: }
7945: }
7946: }
7947: if (-e $fname) {
7948: if (-d $fname) {
7949: $result="directory\n";
7950: } else {
7951: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
7952: my $now=time;
7953: my $found=&addline($fname,$clientname,$clientip,
7954: "$clientname:$clientip:$now\n");
7955: if ($found) { $result="$fname\n"; }
7956: # if they were subscribed to only meta data, delete that
7957: # subscription, when you subscribe to a file you also get
7958: # the metadata
7959: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
7960: $fname=~s/\/home\/httpd\/html\/res/raw/;
7961: my $protocol = $Apache::lonnet::protocol{$perlvar{'lonHostID'}};
7962: $protocol = 'http' if ($protocol ne 'https');
7963: $fname=$protocol.'://'.&Apache::lonnet::hostname($perlvar{'lonHostID'})."/".$fname;
7964: $result="$fname\n";
7965: }
7966: } else {
7967: $result="not_found\n";
7968: }
7969: } else {
7970: $result="rejected\n";
7971: }
7972: return $result;
7973: }
7974: # Change the passwd of a unix user. The caller must have
7975: # first verified that the user is a loncapa user.
7976: #
7977: # Parameters:
7978: # user - Unix user name to change.
7979: # pass - New password for the user.
7980: # Returns:
7981: # ok - if success
7982: # other - Some meaningfule error message string.
7983: # NOTE:
7984: # invokes a setuid script to change the passwd.
7985: sub change_unix_password {
7986: my ($user, $pass) = @_;
7987:
7988: &Debug("change_unix_password");
7989: my $execdir=$perlvar{'lonDaemons'};
7990: &Debug("Opening lcpasswd pipeline");
7991: my $pf = IO::File->new("|$execdir/lcpasswd > "
7992: ."$perlvar{'lonDaemons'}"
7993: ."/logs/lcpasswd.log");
7994: print $pf "$user\n$pass\n$pass\n";
7995: close $pf;
7996: my $err = $?;
7997: return ($err < @passwderrors) ? $passwderrors[$err] :
7998: "pwchange_falure - unknown error";
7999:
8000:
8001: }
8002:
8003:
8004: sub make_passwd_file {
8005: my ($uname,$udom,$umode,$npass,$passfilename,$action)=@_;
8006: my $result="ok";
8007: if ($umode eq 'krb4' or $umode eq 'krb5') {
8008: {
8009: my $pf = IO::File->new(">$passfilename");
8010: if ($pf) {
8011: print $pf "$umode:$npass\n";
8012: &update_passwd_history($uname,$udom,$umode,$action);
8013: } else {
8014: $result = "pass_file_failed_error";
8015: }
8016: }
8017: } elsif ($umode eq 'internal') {
8018: my $ncpass = &hash_passwd($udom,$npass);
8019: {
8020: &Debug("Creating internal auth");
8021: my $pf = IO::File->new(">$passfilename");
8022: if($pf) {
8023: print $pf "internal:$ncpass\n";
8024: &update_passwd_history($uname,$udom,$umode,$action);
8025: } else {
8026: $result = "pass_file_failed_error";
8027: }
8028: }
8029: } elsif ($umode eq 'localauth') {
8030: {
8031: my $pf = IO::File->new(">$passfilename");
8032: if($pf) {
8033: print $pf "localauth:$npass\n";
8034: &update_passwd_history($uname,$udom,$umode,$action);
8035: } else {
8036: $result = "pass_file_failed_error";
8037: }
8038: }
8039: } elsif ($umode eq 'unix') {
8040: &logthis(">>>Attempt to create unix account blocked -- unix auth not available for new users.");
8041: $result="no_new_unix_accounts";
8042: } elsif ($umode eq 'none') {
8043: {
8044: my $pf = IO::File->new("> $passfilename");
8045: if($pf) {
8046: print $pf "none:\n";
8047: } else {
8048: $result = "pass_file_failed_error";
8049: }
8050: }
8051: } else {
8052: $result="auth_mode_error";
8053: }
8054: return $result;
8055: }
8056:
8057: sub convert_photo {
8058: my ($start,$dest)=@_;
8059: system("convert $start $dest");
8060: }
8061:
8062: sub sethost {
8063: my ($remotereq) = @_;
8064: my (undef,$hostid)=split(/:/,$remotereq);
8065: # ignore sethost if we are already correct
8066: if ($hostid eq $currenthostid) {
8067: return 'ok';
8068: }
8069:
8070: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
8071: if (&Apache::lonnet::get_host_ip($perlvar{'lonHostID'})
8072: eq &Apache::lonnet::get_host_ip($hostid)) {
8073: $currenthostid =$hostid;
8074: $currentdomainid=&Apache::lonnet::host_domain($hostid);
8075: # &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
8076: } else {
8077: &logthis("Requested host id $hostid not an alias of ".
8078: $perlvar{'lonHostID'}." refusing connection");
8079: return 'unable_to_set';
8080: }
8081: return 'ok';
8082: }
8083:
8084: sub version {
8085: my ($userinput)=@_;
8086: $remoteVERSION=(split(/:/,$userinput))[1];
8087: return "version:$VERSION";
8088: }
8089:
8090: sub get_usersession_config {
8091: my ($dom,$name) = @_;
8092: my ($usersessionconf,$cached)=&Apache::lonnet::is_cached_new($name,$dom);
8093: if (defined($cached)) {
8094: return $usersessionconf;
8095: } else {
8096: my %domconfig = &Apache::lonnet::get_dom('configuration',['usersessions'],$dom);
8097: &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'usersessions'},3600);
8098: return $domconfig{'usersessions'};
8099: }
8100: return;
8101: }
8102:
8103: sub get_prohibited {
8104: my ($dom) = @_;
8105: my $name = 'trust';
8106: my ($trustconfig,$cached)=&Apache::lonnet::is_cached_new($name,$dom);
8107: unless (defined($cached)) {
8108: my %domconfig = &Apache::lonnet::get_dom('configuration',['trust'],$dom);
8109: &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'trust'},3600);
8110: $trustconfig = $domconfig{'trust'};
8111: }
8112: my %prohibited;
8113: if (ref($trustconfig)) {
8114: foreach my $prefix (keys(%{$trustconfig})) {
8115: if (ref($trustconfig->{$prefix}) eq 'HASH') {
8116: my $reject;
8117: if (ref($trustconfig->{$prefix}->{'exc'}) eq 'ARRAY') {
8118: if (grep(/^\Q$clientintdom\E$/,@{$trustconfig->{$prefix}->{'exc'}})) {
8119: $reject = 1;
8120: }
8121: }
8122: if (ref($trustconfig->{$prefix}->{'inc'}) eq 'ARRAY') {
8123: if (grep(/^\Q$clientintdom\E$/,@{$trustconfig->{$prefix}->{'inc'}})) {
8124: $reject = 0;
8125: } else {
8126: $reject = 1;
8127: }
8128: }
8129: if ($reject) {
8130: $prohibited{$prefix} = 1;
8131: }
8132: }
8133: }
8134: }
8135: return %prohibited;
8136: }
8137:
8138: sub distro_and_arch {
8139: return $dist.':'.$arch;
8140: }
8141:
8142: # ----------------------------------- POD (plain old documentation, CPAN style)
8143:
8144: =head1 NAME
8145:
8146: lond - "LON Daemon" Server (port "LOND" 5663)
8147:
8148: =head1 SYNOPSIS
8149:
8150: Usage: B<lond>
8151:
8152: Should only be run as user=www. This is a command-line script which
8153: is invoked by B<loncron>. There is no expectation that a typical user
8154: will manually start B<lond> from the command-line. (In other words,
8155: DO NOT START B<lond> YOURSELF.)
8156:
8157: =head1 DESCRIPTION
8158:
8159: There are two characteristics associated with the running of B<lond>,
8160: PROCESS MANAGEMENT (starting, stopping, handling child processes)
8161: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
8162: subscriptions, etc). These are described in two large
8163: sections below.
8164:
8165: B<PROCESS MANAGEMENT>
8166:
8167: Preforker - server who forks first. Runs as a daemon. HUPs.
8168: Uses IDEA encryption
8169:
8170: B<lond> forks off children processes that correspond to the other servers
8171: in the network. Management of these processes can be done at the
8172: parent process level or the child process level.
8173:
8174: B<logs/lond.log> is the location of log messages.
8175:
8176: The process management is now explained in terms of linux shell commands,
8177: subroutines internal to this code, and signal assignments:
8178:
8179: =over 4
8180:
8181: =item *
8182:
8183: PID is stored in B<logs/lond.pid>
8184:
8185: This is the process id number of the parent B<lond> process.
8186:
8187: =item *
8188:
8189: SIGTERM and SIGINT
8190:
8191: Parent signal assignment:
8192: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
8193:
8194: Child signal assignment:
8195: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
8196: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
8197: to restart a new child.)
8198:
8199: Command-line invocations:
8200: B<kill> B<-s> SIGTERM I<PID>
8201: B<kill> B<-s> SIGINT I<PID>
8202:
8203: Subroutine B<HUNTSMAN>:
8204: This is only invoked for the B<lond> parent I<PID>.
8205: This kills all the children, and then the parent.
8206: The B<lonc.pid> file is cleared.
8207:
8208: =item *
8209:
8210: SIGHUP
8211:
8212: Current bug:
8213: This signal can only be processed the first time
8214: on the parent process. Subsequent SIGHUP signals
8215: have no effect.
8216:
8217: Parent signal assignment:
8218: $SIG{HUP} = \&HUPSMAN;
8219:
8220: Child signal assignment:
8221: none (nothing happens)
8222:
8223: Command-line invocations:
8224: B<kill> B<-s> SIGHUP I<PID>
8225:
8226: Subroutine B<HUPSMAN>:
8227: This is only invoked for the B<lond> parent I<PID>,
8228: This kills all the children, and then the parent.
8229: The B<lond.pid> file is cleared.
8230:
8231: =item *
8232:
8233: SIGUSR1
8234:
8235: Parent signal assignment:
8236: $SIG{USR1} = \&USRMAN;
8237:
8238: Child signal assignment:
8239: $SIG{USR1}= \&logstatus;
8240:
8241: Command-line invocations:
8242: B<kill> B<-s> SIGUSR1 I<PID>
8243:
8244: Subroutine B<USRMAN>:
8245: When invoked for the B<lond> parent I<PID>,
8246: SIGUSR1 is sent to all the children, and the status of
8247: each connection is logged.
8248:
8249: =item *
8250:
8251: SIGUSR2
8252:
8253: Parent Signal assignment:
8254: $SIG{USR2} = \&UpdateHosts
8255:
8256: Child signal assignment:
8257: NONE
8258:
8259:
8260: =item *
8261:
8262: SIGCHLD
8263:
8264: Parent signal assignment:
8265: $SIG{CHLD} = \&REAPER;
8266:
8267: Child signal assignment:
8268: none
8269:
8270: Command-line invocations:
8271: B<kill> B<-s> SIGCHLD I<PID>
8272:
8273: Subroutine B<REAPER>:
8274: This is only invoked for the B<lond> parent I<PID>.
8275: Information pertaining to the child is removed.
8276: The socket port is cleaned up.
8277:
8278: =back
8279:
8280: B<SERVER-SIDE ACTIVITIES>
8281:
8282: Server-side information can be accepted in an encrypted or non-encrypted
8283: method.
8284:
8285: =over 4
8286:
8287: =item ping
8288:
8289: Query a client in the hosts.tab table; "Are you there?"
8290:
8291: =item pong
8292:
8293: Respond to a ping query.
8294:
8295: =item ekey
8296:
8297: Read in encrypted key, make cipher. Respond with a buildkey.
8298:
8299: =item load
8300:
8301: Respond with CPU load based on a computation upon /proc/loadavg.
8302:
8303: =item currentauth
8304:
8305: Reply with current authentication information (only over an
8306: encrypted channel).
8307:
8308: =item auth
8309:
8310: Only over an encrypted channel, reply as to whether a user's
8311: authentication information can be validated.
8312:
8313: =item passwd
8314:
8315: Allow for a password to be set.
8316:
8317: =item makeuser
8318:
8319: Make a user.
8320:
8321: =item changeuserauth
8322:
8323: Allow for authentication mechanism and password to be changed.
8324:
8325: =item home
8326:
8327: Respond to a question "are you the home for a given user?"
8328:
8329: =item update
8330:
8331: Update contents of a subscribed resource.
8332:
8333: =item unsubscribe
8334:
8335: The server is unsubscribing from a resource.
8336:
8337: =item subscribe
8338:
8339: The server is subscribing to a resource.
8340:
8341: =item log
8342:
8343: Place in B<logs/lond.log>
8344:
8345: =item put
8346:
8347: stores hash in namespace
8348:
8349: =item rolesput
8350:
8351: put a role into a user's environment
8352:
8353: =item get
8354:
8355: returns hash with keys from array
8356: reference filled in from namespace
8357:
8358: =item eget
8359:
8360: returns hash with keys from array
8361: reference filled in from namesp (encrypts the return communication)
8362:
8363: =item rolesget
8364:
8365: get a role from a user's environment
8366:
8367: =item del
8368:
8369: deletes keys out of array from namespace
8370:
8371: =item keys
8372:
8373: returns namespace keys
8374:
8375: =item dump
8376:
8377: dumps the complete (or key matching regexp) namespace into a hash
8378:
8379: =item store
8380:
8381: stores hash permanently
8382: for this url; hashref needs to be given and should be a \%hashname; the
8383: remaining args aren't required and if they aren't passed or are '' they will
8384: be derived from the ENV
8385:
8386: =item restore
8387:
8388: returns a hash for a given url
8389:
8390: =item querysend
8391:
8392: Tells client about the lonsql process that has been launched in response
8393: to a sent query.
8394:
8395: =item queryreply
8396:
8397: Accept information from lonsql and make appropriate storage in temporary
8398: file space.
8399:
8400: =item idput
8401:
8402: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
8403: for each student, defined perhaps by the institutional Registrar.)
8404:
8405: =item idget
8406:
8407: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
8408: for each student, defined perhaps by the institutional Registrar.)
8409:
8410: =item iddel
8411:
8412: Deletes one or more ids in a domain's id database.
8413:
8414: =item tmpput
8415:
8416: Accept and store information in temporary space.
8417:
8418: =item tmpget
8419:
8420: Send along temporarily stored information.
8421:
8422: =item ls
8423:
8424: List part of a user's directory.
8425:
8426: =item pushtable
8427:
8428: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
8429: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
8430: must be restored manually in case of a problem with the new table file.
8431: pushtable requires that the request be encrypted and validated via
8432: ValidateManager. The form of the command is:
8433: enc:pushtable tablename <tablecontents> \n
8434: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
8435: cleartext newline.
8436:
8437: =item Hanging up (exit or init)
8438:
8439: What to do when a client tells the server that they (the client)
8440: are leaving the network.
8441:
8442: =item unknown command
8443:
8444: If B<lond> is sent an unknown command (not in the list above),
8445: it replys to the client "unknown_cmd".
8446:
8447:
8448: =item UNKNOWN CLIENT
8449:
8450: If the anti-spoofing algorithm cannot verify the client,
8451: the client is rejected (with a "refused" message sent
8452: to the client, and the connection is closed.
8453:
8454: =back
8455:
8456: =head1 PREREQUISITES
8457:
8458: IO::Socket
8459: IO::File
8460: Apache::File
8461: POSIX
8462: Crypt::IDEA
8463: LWP::UserAgent()
8464: GDBM_File
8465: Authen::Krb4
8466: Authen::Krb5
8467:
8468: =head1 COREQUISITES
8469:
8470: none
8471:
8472: =head1 OSNAMES
8473:
8474: linux
8475:
8476: =head1 SCRIPT CATEGORIES
8477:
8478: Server/Process
8479:
8480: =cut
8481:
8482:
8483: =pod
8484:
8485: =head1 LOG MESSAGES
8486:
8487: The messages below can be emitted in the lond log. This log is located
8488: in ~httpd/perl/logs/lond.log Many log messages have HTML encapsulation
8489: to provide coloring if examined from inside a web page. Some do not.
8490: Where color is used, the colors are; Red for sometihhng to get excited
8491: about and to follow up on. Yellow for something to keep an eye on to
8492: be sure it does not get worse, Green,and Blue for informational items.
8493:
8494: In the discussions below, sometimes reference is made to ~httpd
8495: when describing file locations. There isn't really an httpd
8496: user, however there is an httpd directory that gets installed in the
8497: place that user home directories go. On linux, this is usually
8498: (always?) /home/httpd.
8499:
8500:
8501: Some messages are colorless. These are usually (not always)
8502: Green/Blue color level messages.
8503:
8504: =over 2
8505:
8506: =item (Red) LocalConnection rejecting non local: <ip> ne 127.0.0.1
8507:
8508: A local connection negotiation was attempted by
8509: a host whose IP address was not 127.0.0.1.
8510: The socket is closed and the child will exit.
8511: lond has three ways to establish an encyrption
8512: key with a client:
8513:
8514: =over 2
8515:
8516: =item local
8517:
8518: The key is written and read from a file.
8519: This is only valid for connections from localhost.
8520:
8521: =item insecure
8522:
8523: The key is generated by the server and
8524: transmitted to the client.
8525:
8526: =item ssl (secure)
8527:
8528: An ssl connection is negotiated with the client,
8529: the key is generated by the server and sent to the
8530: client across this ssl connection before the
8531: ssl connectionis terminated and clear text
8532: transmission resumes.
8533:
8534: =back
8535:
8536: =item (Red) LocalConnection: caller is insane! init = <init> and type = <type>
8537:
8538: The client is local but has not sent an initialization
8539: string that is the literal "init:local" The connection
8540: is closed and the child exits.
8541:
8542: =item Red CRITICAL Can't get key file <error>
8543:
8544: SSL key negotiation is being attempted but the call to
8545: lonssl::KeyFile failed. This usually means that the
8546: configuration file is not correctly defining or protecting
8547: the directories/files lonCertificateDirectory or
8548: lonnetPrivateKey
8549: <error> is a string that describes the reason that
8550: the key file could not be located.
8551:
8552: =item (Red) CRITICAL Can't get certificates <error>
8553:
8554: SSL key negotiation failed because we were not able to retrives our certificate
8555: or the CA's certificate in the call to lonssl::CertificateFile
8556: <error> is the textual reason this failed. Usual reasons:
8557:
8558: =over 2
8559:
8560: =item Apache config file for loncapa incorrect:
8561:
8562: one of the variables
8563: lonCertificateDirectory, lonnetCertificateAuthority, or lonnetCertificate
8564: undefined or incorrect
8565:
8566: =item Permission error:
8567:
8568: The directory pointed to by lonCertificateDirectory is not readable by lond
8569:
8570: =item Permission error:
8571:
8572: Files in the directory pointed to by lonCertificateDirectory are not readable by lond.
8573:
8574: =item Installation error:
8575:
8576: Either the certificate authority file or the certificate have not
8577: been installed in lonCertificateDirectory.
8578:
8579: =item (Red) CRITICAL SSL Socket promotion failed: <err>
8580:
8581: The promotion of the connection from plaintext to SSL failed
8582: <err> is the reason for the failure. There are two
8583: system calls involved in the promotion (one of which failed),
8584: a dup to produce
8585: a second fd on the raw socket over which the encrypted data
8586: will flow and IO::SOcket::SSL->new_from_fd which creates
8587: the SSL connection on the duped fd.
8588:
8589: =item (Blue) WARNING client did not respond to challenge
8590:
8591: This occurs on an insecure (non SSL) connection negotiation request.
8592: lond generates some number from the time, the PID and sends it to
8593: the client. The client must respond by echoing this information back.
8594: If the client does not do so, that's a violation of the challenge
8595: protocols and the connection will be failed.
8596:
8597: =item (Red) No manager table. Nobody can manage!!
8598:
8599: lond has the concept of privileged hosts that
8600: can perform remote management function such
8601: as update the hosts.tab. The manager hosts
8602: are described in the
8603: ~httpd/lonTabs/managers.tab file.
8604: this message is logged if this file is missing.
8605:
8606:
8607: =item (Green) Registering manager <dnsname> as <cluster_name> with <ipaddress>
8608:
8609: Reports the successful parse and registration
8610: of a specific manager.
8611:
8612: =item Green existing host <clustername:dnsname>
8613:
8614: The manager host is already defined in the hosts.tab
8615: the information in that table, rather than the info in the
8616: manager table will be used to determine the manager's ip.
8617:
8618: =item (Red) Unable to craete <filename>
8619:
8620: lond has been asked to create new versions of an administrative
8621: file (by a manager). When this is done, the new file is created
8622: in a temp file and then renamed into place so that there are always
8623: usable administrative files, even if the update fails. This failure
8624: message means that the temp file could not be created.
8625: The update is abandoned, and the old file is available for use.
8626:
8627: =item (Green) CopyFile from <oldname> to <newname> failed
8628:
8629: In an update of administrative files, the copy of the existing file to a
8630: backup file failed. The installation of the new file may still succeed,
8631: but there will not be a back up file to rever to (this should probably
8632: be yellow).
8633:
8634: =item (Green) Pushfile: backed up <oldname> to <newname>
8635:
8636: See above, the backup of the old administrative file succeeded.
8637:
8638: =item (Red) Pushfile: Unable to install <filename> <reason>
8639:
8640: The new administrative file could not be installed. In this case,
8641: the old administrative file is still in use.
8642:
8643: =item (Green) Installed new < filename>.
8644:
8645: The new administrative file was successfullly installed.
8646:
8647: =item (Red) Reinitializing lond pid=<pid>
8648:
8649: The lonc child process <pid> will be sent a USR2
8650: signal.
8651:
8652: =item (Red) Reinitializing self
8653:
8654: We've been asked to re-read our administrative files,and
8655: are doing so.
8656:
8657: =item (Yellow) error:Invalid process identifier <ident>
8658:
8659: A reinit command was received, but the target part of the
8660: command was not valid. It must be either
8661: 'lond' or 'lonc' but was <ident>
8662:
8663: =item (Green) isValideditCommand checking: Command = <command> Key = <key> newline = <newline>
8664:
8665: Checking to see if lond has been handed a valid edit
8666: command. It is possible the edit command is not valid
8667: in that case there are no log messages to indicate that.
8668:
8669: =item Result of password change for <username> pwchange_success
8670:
8671: The password for <username> was
8672: successfully changed.
8673:
8674: =item Unable to open <user> passwd to change password
8675:
8676: Could not rewrite the
8677: internal password file for a user
8678:
8679: =item Result of password change for <user> : <result>
8680:
8681: A unix password change for <user> was attempted
8682: and the pipe returned <result>
8683:
8684: =item LWP GET: <message> for <fname> (<remoteurl>)
8685:
8686: The lightweight process fetch for a resource failed
8687: with <message> the local filename that should
8688: have existed/been created was <fname> the
8689: corresponding URI: <remoteurl> This is emitted in several
8690: places.
8691:
8692: =item Unable to move <transname> to <destname>
8693:
8694: From fetch_user_file_handler - the user file was replicated but could not
8695: be mv'd to its final location.
8696:
8697: =item Looking for <domain> <username>
8698:
8699: From user_has_session_handler - This should be a Debug call instead
8700: it indicates lond is about to check whether the specified user has a
8701: session active on the specified domain on the local host.
8702:
8703: =item Client <ip> (<name>) hanging up: <input>
8704:
8705: lond has been asked to exit by its client. The <ip> and <name> identify the
8706: client systemand <input> is the full exit command sent to the server.
8707:
8708: =item Red CRITICAL: ABNORMAL EXIT. child <pid> for server <hostname> died through a crass with this error->[<message>].
8709:
8710: A lond child terminated. NOte that this termination can also occur when the
8711: child receives the QUIT or DIE signals. <pid> is the process id of the child,
8712: <hostname> the host lond is working for, and <message> the reason the child died
8713: to the best of our ability to get it (I would guess that any numeric value
8714: represents and errno value). This is immediately followed by
8715:
8716: =item Famous last words: Catching exception - <log>
8717:
8718: Where log is some recent information about the state of the child.
8719:
8720: =item Red CRITICAL: TIME OUT <pid>
8721:
8722: Some timeout occured for server <pid>. THis is normally a timeout on an LWP
8723: doing an HTTP::GET.
8724:
8725: =item child <pid> died
8726:
8727: The reaper caught a SIGCHILD for the lond child process <pid>
8728: This should be modified to also display the IP of the dying child
8729: $children{$pid}
8730:
8731: =item Unknown child 0 died
8732: A child died but the wait for it returned a pid of zero which really should not
8733: ever happen.
8734:
8735: =item Child <which> - <pid> looks like we missed it's death
8736:
8737: When a sigchild is received, the reaper process checks all children to see if they are
8738: alive. If children are dying quite quickly, the lack of signal queuing can mean
8739: that a signal hearalds the death of more than one child. If so this message indicates
8740: which other one died. <which> is the ip of a dead child
8741:
8742: =item Free socket: <shutdownretval>
8743:
8744: The HUNTSMAN sub was called due to a SIGINT in a child process. The socket is being shutdown.
8745: for whatever reason, <shutdownretval> is printed but in fact shutdown() is not documented
8746: to return anything. This is followed by:
8747:
8748: =item Red CRITICAL: Shutting down
8749:
8750: Just prior to exit.
8751:
8752: =item Free socket: <shutdownretval>
8753:
8754: The HUPSMAN sub was called due to a SIGHUP. all children get killsed, and lond execs itself.
8755: This is followed by:
8756:
8757: =item (Red) CRITICAL: Restarting
8758:
8759: lond is about to exec itself to restart.
8760:
8761: =item (Blue) Updating connections
8762:
8763: (In response to a USR2). All the children (except the one for localhost)
8764: are about to be killed, the hosts tab reread, and Apache reloaded via apachereload.
8765:
8766: =item (Blue) UpdateHosts killing child <pid> for ip <ip>
8767:
8768: Due to USR2 as above.
8769:
8770: =item (Green) keeping child for ip <ip> (pid = <pid>)
8771:
8772: In response to USR2 as above, the child indicated is not being restarted because
8773: it's assumed that we'll always need a child for the localhost.
8774:
8775:
8776: =item Going to check on the children
8777:
8778: Parent is about to check on the health of the child processes.
8779: Note that this is in response to a USR1 sent to the parent lond.
8780: there may be one or more of the next two messages:
8781:
8782: =item <pid> is dead
8783:
8784: A child that we have in our child hash as alive has evidently died.
8785:
8786: =item Child <pid> did not respond
8787:
8788: In the health check the child <pid> did not update/produce a pid_.txt
8789: file when sent it's USR1 signal. That process is killed with a 9 signal, as it's
8790: assumed to be hung in some un-fixable way.
8791:
8792: =item Finished checking children
8793:
8794: Master processs's USR1 processing is cojmplete.
8795:
8796: =item (Red) CRITICAL: ------- Starting ------
8797:
8798: (There are more '-'s on either side). Lond has forked itself off to
8799: form a new session and is about to start actual initialization.
8800:
8801: =item (Green) Attempting to start child (<client>)
8802:
8803: Started a new child process for <client>. Client is IO::Socket object
8804: connected to the child. This was as a result of a TCP/IP connection from a client.
8805:
8806: =item Unable to determine who caller was, getpeername returned nothing
8807:
8808: In child process initialization. either getpeername returned undef or
8809: a zero sized object was returned. Processing continues, but in my opinion,
8810: this should be cause for the child to exit.
8811:
8812: =item Unable to determine clientip
8813:
8814: In child process initialization. The peer address from getpeername was not defined.
8815: The client address is stored as "Unavailable" and processing continues.
8816:
8817: =item (Yellow) INFO: Connection <ip> <name> connection type = <type>
8818:
8819: In child initialization. A good connectionw as received from <ip>.
8820:
8821: =over 2
8822:
8823: =item <name>
8824:
8825: is the name of the client from hosts.tab.
8826:
8827: =item <type>
8828:
8829: Is the connection type which is either
8830:
8831: =over 2
8832:
8833: =item manager
8834:
8835: The connection is from a manager node, not in hosts.tab
8836:
8837: =item client
8838:
8839: the connection is from a non-manager in the hosts.tab
8840:
8841: =item both
8842:
8843: The connection is from a manager in the hosts.tab.
8844:
8845: =back
8846:
8847: =back
8848:
8849: =item (Blue) Certificates not installed -- trying insecure auth
8850:
8851: One of the certificate file, key file or
8852: certificate authority file could not be found for a client attempting
8853: SSL connection intiation. COnnection will be attemptied in in-secure mode.
8854: (this would be a system with an up to date lond that has not gotten a
8855: certificate from us).
8856:
8857: =item (Green) Successful local authentication
8858:
8859: A local connection successfully negotiated the encryption key.
8860: In this case the IDEA key is in a file (that is hopefully well protected).
8861:
8862: =item (Green) Successful ssl authentication with <client>
8863:
8864: The client (<client> is the peer's name in hosts.tab), has successfully
8865: negotiated an SSL connection with this child process.
8866:
8867: =item (Green) Successful insecure authentication with <client>
8868:
8869:
8870: The client has successfully negotiated an insecure connection withthe child process.
8871:
8872: =item (Yellow) Attempted insecure connection disallowed
8873:
8874: The client attempted and failed to successfully negotiate a successful insecure
8875: connection. This can happen either because the variable londAllowInsecure is false
8876: or undefined, or becuse the child did not successfully echo back the challenge
8877: string.
8878:
8879:
8880: =back
8881:
8882: =back
8883:
8884:
8885: =cut
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