1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.489.2.35 2020/01/13 13:41:24 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 LWP::UserAgent();
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:
61: my $DEBUG = 0; # Non zero to enable debug log entries.
62:
63: my $status='';
64: my $lastlog='';
65:
66: my $VERSION='$Revision: 1.489.2.35 $'; #' stupid emacs
67: my $remoteVERSION;
68: my $currenthostid="default";
69: my $currentdomainid;
70:
71: my $client;
72: my $clientip; # IP address of client.
73: my $clientname; # LonCAPA name of client.
74: my $clientversion; # LonCAPA version running on client.
75: my $clienthomedom; # LonCAPA domain of homeID for client.
76: # primary library server.
77:
78: my $server;
79:
80: my $keymode;
81:
82: my $cipher; # Cipher key negotiated with client
83: my $tmpsnum = 0; # Id of tmpputs.
84:
85: #
86: # Connection type is:
87: # client - All client actions are allowed
88: # manager - only management functions allowed.
89: # both - Both management and client actions are allowed
90: #
91:
92: my $ConnectionType;
93:
94: my %managers; # Ip -> manager names
95:
96: my %perlvar; # Will have the apache conf defined perl vars.
97:
98: my $dist;
99:
100: #
101: # The hash below is used for command dispatching, and is therefore keyed on the request keyword.
102: # Each element of the hash contains a reference to an array that contains:
103: # A reference to a sub that executes the request corresponding to the keyword.
104: # A flag that is true if the request must be encoded to be acceptable.
105: # A mask with bits as follows:
106: # CLIENT_OK - Set when the function is allowed by ordinary clients
107: # MANAGER_OK - Set when the function is allowed to manager clients.
108: #
109: my $CLIENT_OK = 1;
110: my $MANAGER_OK = 2;
111: my %Dispatcher;
112:
113:
114: #
115: # The array below are password error strings."
116: #
117: my $lastpwderror = 13; # Largest error number from lcpasswd.
118: my @passwderrors = ("ok",
119: "pwchange_failure - lcpasswd must be run as user 'www'",
120: "pwchange_failure - lcpasswd got incorrect number of arguments",
121: "pwchange_failure - lcpasswd did not get the right nubmer of input text lines",
122: "pwchange_failure - lcpasswd too many simultaneous pwd changes in progress",
123: "pwchange_failure - lcpasswd User does not exist.",
124: "pwchange_failure - lcpasswd Incorrect current passwd",
125: "pwchange_failure - lcpasswd Unable to su to root.",
126: "pwchange_failure - lcpasswd Cannot set new passwd.",
127: "pwchange_failure - lcpasswd Username has invalid characters",
128: "pwchange_failure - lcpasswd Invalid characters in password",
129: "pwchange_failure - lcpasswd User already exists",
130: "pwchange_failure - lcpasswd Something went wrong with user addition.",
131: "pwchange_failure - lcpasswd Password mismatch",
132: "pwchange_failure - lcpasswd Error filename is invalid");
133:
134:
135: # This array are the errors from lcinstallfile:
136:
137: my @installerrors = ("ok",
138: "Initial user id of client not that of www",
139: "Usage error, not enough command line arguments",
140: "Source filename does not exist",
141: "Destination filename does not exist",
142: "Some file operation failed",
143: "Invalid table filename."
144: );
145:
146: #
147: # Statistics that are maintained and dislayed in the status line.
148: #
149: my $Transactions = 0; # Number of attempted transactions.
150: my $Failures = 0; # Number of transcations failed.
151:
152: # ResetStatistics:
153: # Resets the statistics counters:
154: #
155: sub ResetStatistics {
156: $Transactions = 0;
157: $Failures = 0;
158: }
159:
160: #------------------------------------------------------------------------
161: #
162: # LocalConnection
163: # Completes the formation of a locally authenticated connection.
164: # This function will ensure that the 'remote' client is really the
165: # local host. If not, the connection is closed, and the function fails.
166: # If so, initcmd is parsed for the name of a file containing the
167: # IDEA session key. The fie is opened, read, deleted and the session
168: # key returned to the caller.
169: #
170: # Parameters:
171: # $Socket - Socket open on client.
172: # $initcmd - The full text of the init command.
173: #
174: # Returns:
175: # IDEA session key on success.
176: # undef on failure.
177: #
178: sub LocalConnection {
179: my ($Socket, $initcmd) = @_;
180: Debug("Attempting local connection: $initcmd client: $clientip");
181: if($clientip ne "127.0.0.1") {
182: &logthis('<font color="red"> LocalConnection rejecting non local: '
183: ."$clientip ne 127.0.0.1 </font>");
184: close $Socket;
185: return undef;
186: } else {
187: chomp($initcmd); # Get rid of \n in filename.
188: my ($init, $type, $name) = split(/:/, $initcmd);
189: Debug(" Init command: $init $type $name ");
190:
191: # Require that $init = init, and $type = local: Otherwise
192: # the caller is insane:
193:
194: if(($init ne "init") && ($type ne "local")) {
195: &logthis('<font color = "red"> LocalConnection: caller is insane! '
196: ."init = $init, and type = $type </font>");
197: close($Socket);;
198: return undef;
199:
200: }
201: # Now get the key filename:
202:
203: my $IDEAKey = lonlocal::ReadKeyFile($name);
204: return $IDEAKey;
205: }
206: }
207: #------------------------------------------------------------------------------
208: #
209: # SSLConnection
210: # Completes the formation of an ssh authenticated connection. The
211: # socket is promoted to an ssl socket. If this promotion and the associated
212: # certificate exchange are successful, the IDEA key is generated and sent
213: # to the remote peer via the SSL tunnel. The IDEA key is also returned to
214: # the caller after the SSL tunnel is torn down.
215: #
216: # Parameters:
217: # Name Type Purpose
218: # $Socket IO::Socket::INET Plaintext socket.
219: #
220: # Returns:
221: # IDEA key on success.
222: # undef on failure.
223: #
224: sub SSLConnection {
225: my $Socket = shift;
226:
227: Debug("SSLConnection: ");
228: my $KeyFile = lonssl::KeyFile();
229: if(!$KeyFile) {
230: my $err = lonssl::LastError();
231: &logthis("<font color=\"red\"> CRITICAL"
232: ."Can't get key file $err </font>");
233: return undef;
234: }
235: my ($CACertificate,
236: $Certificate) = lonssl::CertificateFile();
237:
238:
239: # If any of the key, certificate or certificate authority
240: # certificate filenames are not defined, this can't work.
241:
242: if((!$Certificate) || (!$CACertificate)) {
243: my $err = lonssl::LastError();
244: &logthis("<font color=\"red\"> CRITICAL"
245: ."Can't get certificates: $err </font>");
246:
247: return undef;
248: }
249: Debug("Key: $KeyFile CA: $CACertificate Cert: $Certificate");
250:
251: # Indicate to our peer that we can procede with
252: # a transition to ssl authentication:
253:
254: print $Socket "ok:ssl\n";
255:
256: Debug("Approving promotion -> ssl");
257: # And do so:
258:
259: my $SSLSocket = lonssl::PromoteServerSocket($Socket,
260: $CACertificate,
261: $Certificate,
262: $KeyFile);
263: if(! ($SSLSocket) ) { # SSL socket promotion failed.
264: my $err = lonssl::LastError();
265: &logthis("<font color=\"red\"> CRITICAL "
266: ."SSL Socket promotion failed: $err </font>");
267: return undef;
268: }
269: Debug("SSL Promotion successful");
270:
271: #
272: # The only thing we'll use the socket for is to send the IDEA key
273: # to the peer:
274:
275: my $Key = lonlocal::CreateCipherKey();
276: print $SSLSocket "$Key\n";
277:
278: lonssl::Close($SSLSocket);
279:
280: Debug("Key exchange complete: $Key");
281:
282: return $Key;
283: }
284: #
285: # InsecureConnection:
286: # If insecure connections are allowd,
287: # exchange a challenge with the client to 'validate' the
288: # client (not really, but that's the protocol):
289: # We produce a challenge string that's sent to the client.
290: # The client must then echo the challenge verbatim to us.
291: #
292: # Parameter:
293: # Socket - Socket open on the client.
294: # Returns:
295: # 1 - success.
296: # 0 - failure (e.g.mismatch or insecure not allowed).
297: #
298: sub InsecureConnection {
299: my $Socket = shift;
300:
301: # Don't even start if insecure connections are not allowed.
302:
303: if(! $perlvar{londAllowInsecure}) { # Insecure connections not allowed.
304: return 0;
305: }
306:
307: # Fabricate a challenge string and send it..
308:
309: my $challenge = "$$".time; # pid + time.
310: print $Socket "$challenge\n";
311: &status("Waiting for challenge reply");
312:
313: my $answer = <$Socket>;
314: $answer =~s/\W//g;
315: if($challenge eq $answer) {
316: return 1;
317: } else {
318: logthis("<font color='blue'>WARNING client did not respond to challenge</font>");
319: &status("No challenge reqply");
320: return 0;
321: }
322:
323:
324: }
325: #
326: # Safely execute a command (as long as it's not a shel command and doesn
327: # not require/rely on shell escapes. The function operates by doing a
328: # a pipe based fork and capturing stdout and stderr from the pipe.
329: #
330: # Formal Parameters:
331: # $line - A line of text to be executed as a command.
332: # Returns:
333: # The output from that command. If the output is multiline the caller
334: # must know how to split up the output.
335: #
336: #
337: sub execute_command {
338: my ($line) = @_;
339: my @words = split(/\s/, $line); # Bust the command up into words.
340: my $output = "";
341:
342: my $pid = open(CHILD, "-|");
343:
344: if($pid) { # Parent process
345: Debug("In parent process for execute_command");
346: my @data = <CHILD>; # Read the child's outupt...
347: close CHILD;
348: foreach my $output_line (@data) {
349: Debug("Adding $output_line");
350: $output .= $output_line; # Presumably has a \n on it.
351: }
352:
353: } else { # Child process
354: close (STDERR);
355: open (STDERR, ">&STDOUT");# Combine stderr, and stdout...
356: exec(@words); # won't return.
357: }
358: return $output;
359: }
360:
361:
362: # GetCertificate: Given a transaction that requires a certificate,
363: # this function will extract the certificate from the transaction
364: # request. Note that at this point, the only concept of a certificate
365: # is the hostname to which we are connected.
366: #
367: # Parameter:
368: # request - The request sent by our client (this parameterization may
369: # need to change when we really use a certificate granting
370: # authority.
371: #
372: sub GetCertificate {
373: my $request = shift;
374:
375: return $clientip;
376: }
377:
378: #
379: # Return true if client is a manager.
380: #
381: sub isManager {
382: return (($ConnectionType eq "manager") || ($ConnectionType eq "both"));
383: }
384: #
385: # Return tru if client can do client functions
386: #
387: sub isClient {
388: return (($ConnectionType eq "client") || ($ConnectionType eq "both"));
389: }
390:
391:
392: #
393: # ReadManagerTable: Reads in the current manager table. For now this is
394: # done on each manager authentication because:
395: # - These authentications are not frequent
396: # - This allows dynamic changes to the manager table
397: # without the need to signal to the lond.
398: #
399: sub ReadManagerTable {
400:
401: &Debug("Reading manager table");
402: # Clean out the old table first..
403:
404: foreach my $key (keys %managers) {
405: delete $managers{$key};
406: }
407:
408: my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
409: if (!open (MANAGERS, $tablename)) {
410: my $hostname = &Apache::lonnet::hostname($perlvar{'lonHostID'});
411: if (&Apache::lonnet::is_LC_dns($hostname)) {
412: &logthis('<font color="red">No manager table. Nobody can manage!!</font>');
413: }
414: return;
415: }
416: while(my $host = <MANAGERS>) {
417: chomp($host);
418: if ($host =~ "^#") { # Comment line.
419: next;
420: }
421: if (!defined &Apache::lonnet::get_host_ip($host)) { # This is a non cluster member
422: # The entry is of the form:
423: # cluname:hostname
424: # cluname - A 'cluster hostname' is needed in order to negotiate
425: # the host key.
426: # hostname- The dns name of the host.
427: #
428: my($cluname, $dnsname) = split(/:/, $host);
429:
430: my $ip = gethostbyname($dnsname);
431: if(defined($ip)) { # bad names don't deserve entry.
432: my $hostip = inet_ntoa($ip);
433: $managers{$hostip} = $cluname;
434: logthis('<font color="green"> registering manager '.
435: "$dnsname as $cluname with $hostip </font>\n");
436: }
437: } else {
438: logthis('<font color="green"> existing host'." $host</font>\n");
439: $managers{&Apache::lonnet::get_host_ip($host)} = $host; # Use info from cluster tab if cluster memeber
440: }
441: }
442: }
443:
444: #
445: # ValidManager: Determines if a given certificate represents a valid manager.
446: # in this primitive implementation, the 'certificate' is
447: # just the connecting loncapa client name. This is checked
448: # against a valid client list in the configuration.
449: #
450: #
451: sub ValidManager {
452: my $certificate = shift;
453:
454: return isManager;
455: }
456: #
457: # CopyFile: Called as part of the process of installing a
458: # new configuration file. This function copies an existing
459: # file to a backup file.
460: # Parameters:
461: # oldfile - Name of the file to backup.
462: # newfile - Name of the backup file.
463: # Return:
464: # 0 - Failure (errno has failure reason).
465: # 1 - Success.
466: #
467: sub CopyFile {
468:
469: my ($oldfile, $newfile) = @_;
470:
471: if (! copy($oldfile,$newfile)) {
472: return 0;
473: }
474: chmod(0660, $newfile);
475: return 1;
476: }
477: #
478: # Host files are passed out with externally visible host IPs.
479: # If, for example, we are behind a fire-wall or NAT host, our
480: # internally visible IP may be different than the externally
481: # visible IP. Therefore, we always adjust the contents of the
482: # host file so that the entry for ME is the IP that we believe
483: # we have. At present, this is defined as the entry that
484: # DNS has for us. If by some chance we are not able to get a
485: # DNS translation for us, then we assume that the host.tab file
486: # is correct.
487: # BUGBUGBUG - in the future, we really should see if we can
488: # easily query the interface(s) instead.
489: # Parameter(s):
490: # contents - The contents of the host.tab to check.
491: # Returns:
492: # newcontents - The adjusted contents.
493: #
494: #
495: sub AdjustHostContents {
496: my $contents = shift;
497: my $adjusted;
498: my $me = $perlvar{'lonHostID'};
499:
500: foreach my $line (split(/\n/,$contents)) {
501: if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/) ||
502: ($line =~ /^\s*\^/))) {
503: chomp($line);
504: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
505: if ($id eq $me) {
506: my $ip = gethostbyname($name);
507: my $ipnew = inet_ntoa($ip);
508: $ip = $ipnew;
509: # Reconstruct the host line and append to adjusted:
510:
511: my $newline = "$id:$domain:$role:$name:$ip";
512: if($maxcon ne "") { # Not all hosts have loncnew tuning params
513: $newline .= ":$maxcon:$idleto:$mincon";
514: }
515: $adjusted .= $newline."\n";
516:
517: } else { # Not me, pass unmodified.
518: $adjusted .= $line."\n";
519: }
520: } else { # Blank or comment never re-written.
521: $adjusted .= $line."\n"; # Pass blanks and comments as is.
522: }
523: }
524: return $adjusted;
525: }
526: #
527: # InstallFile: Called to install an administrative file:
528: # - The file is created int a temp directory called <name>.tmp
529: # - lcinstall file is called to install the file.
530: # since the web app has no direct write access to the table directory
531: #
532: # Parameters:
533: # Name of the file
534: # File Contents.
535: # Return:
536: # nonzero - success.
537: # 0 - failure and $! has an errno.
538: # Assumptions:
539: # File installtion is a relatively infrequent
540: #
541: sub InstallFile {
542:
543: my ($Filename, $Contents) = @_;
544: # my $TempFile = $Filename.".tmp";
545: my $exedir = $perlvar{'lonDaemons'};
546: my $tmpdir = $exedir.'/tmp/';
547: my $TempFile = $tmpdir."TempTableFile.tmp";
548:
549: # Open the file for write:
550:
551: my $fh = IO::File->new("> $TempFile"); # Write to temp.
552: if(!(defined $fh)) {
553: &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
554: return 0;
555: }
556: # write the contents of the file:
557:
558: print $fh ($Contents);
559: $fh->close; # In case we ever have a filesystem w. locking
560:
561: chmod(0664, $TempFile); # Everyone can write it.
562:
563: # Use lcinstall file to put the file in the table directory...
564:
565: &Debug("Opening pipe to $exedir/lcinstallfile $TempFile $Filename");
566: my $pf = IO::File->new("| $exedir/lcinstallfile $TempFile $Filename > $exedir/logs/lcinstallfile.log");
567: close $pf;
568: my $err = $?;
569: &Debug("Status is $err");
570: if ($err != 0) {
571: my $msg = $err;
572: if ($err < @installerrors) {
573: $msg = $installerrors[$err];
574: }
575: &logthis("Install failed for table file $Filename : $msg");
576: return 0;
577: }
578:
579: # Remove the temp file:
580:
581: unlink($TempFile);
582:
583: return 1;
584: }
585:
586:
587: #
588: # ConfigFileFromSelector: converts a configuration file selector
589: # into a configuration file pathname.
590: # Supports the following file selectors:
591: # hosts, domain, dns_hosts, dns_domain
592: #
593: #
594: # Parameters:
595: # selector - Configuration file selector.
596: # Returns:
597: # Full path to the file or undef if the selector is invalid.
598: #
599: sub ConfigFileFromSelector {
600: my $selector = shift;
601: my $tablefile;
602:
603: my $tabledir = $perlvar{'lonTabDir'}.'/';
604: if (($selector eq "hosts") || ($selector eq "domain") ||
605: ($selector eq "dns_hosts") || ($selector eq "dns_domain")) {
606: $tablefile = $tabledir.$selector.'.tab';
607: }
608: return $tablefile;
609: }
610: #
611: # PushFile: Called to do an administrative push of a file.
612: # - Ensure the file being pushed is one we support.
613: # - Backup the old file to <filename.saved>
614: # - Separate the contents of the new file out from the
615: # rest of the request.
616: # - Write the new file.
617: # Parameter:
618: # Request - The entire user request. This consists of a : separated
619: # string pushfile:tablename:contents.
620: # NOTE: The contents may have :'s in it as well making things a bit
621: # more interesting... but not much.
622: # Returns:
623: # String to send to client ("ok" or "refused" if bad file).
624: #
625: sub PushFile {
626: my $request = shift;
627: my ($command, $filename, $contents) = split(":", $request, 3);
628: &Debug("PushFile");
629:
630: # At this point in time, pushes for only the following tables are
631: # supported:
632: # hosts.tab ($filename eq host).
633: # domain.tab ($filename eq domain).
634: # dns_hosts.tab ($filename eq dns_host).
635: # dns_domain.tab ($filename eq dns_domain).
636: # Construct the destination filename or reject the request.
637: #
638: # lonManage is supposed to ensure this, however this session could be
639: # part of some elaborate spoof that managed somehow to authenticate.
640: #
641:
642:
643: my $tablefile = ConfigFileFromSelector($filename);
644: if(! (defined $tablefile)) {
645: return "refused";
646: }
647:
648: # If the file being pushed is the host file, we adjust the entry for ourself so that the
649: # IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible
650: # to conceive of conditions where we don't have a DNS entry locally. This is possible in a
651: # network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
652: # that possibilty.
653:
654: if($filename eq "host") {
655: $contents = AdjustHostContents($contents);
656: } elsif ($filename eq 'dns_host' || $filename eq 'dns_domain') {
657: if ($contents eq '') {
658: &logthis('<font color="red"> Pushfile: unable to install '
659: .$tablefile." - no data received from push. </font>");
660: return 'error: push had no data';
661: }
662: if (&Apache::lonnet::get_host_ip($clientname)) {
663: my $clienthost = &Apache::lonnet::hostname($clientname);
664: if ($managers{$clientip} eq $clientname) {
665: my $clientprotocol = $Apache::lonnet::protocol{$clientname};
666: $clientprotocol = 'http' if ($clientprotocol ne 'https');
667: my $url = '/adm/'.$filename;
668: $url =~ s{_}{/};
669: my $ua=new LWP::UserAgent;
670: $ua->timeout(60);
671: my $request=new HTTP::Request('GET',"$clientprotocol://$clienthost$url");
672: my $response=$ua->request($request);
673: if ($response->is_error()) {
674: &logthis('<font color="red"> Pushfile: unable to install '
675: .$tablefile." - error attempting to pull data. </font>");
676: return 'error: pull failed';
677: } else {
678: my $result = $response->content;
679: chomp($result);
680: unless ($result eq $contents) {
681: &logthis('<font color="red"> Pushfile: unable to install '
682: .$tablefile." - pushed data and pulled data differ. </font>");
683: my $pushleng = length($contents);
684: my $pullleng = length($result);
685: if ($pushleng != $pullleng) {
686: return "error: $pushleng vs $pullleng bytes";
687: } else {
688: return "error: mismatch push and pull";
689: }
690: }
691: }
692: }
693: }
694: }
695:
696: # Install the new file:
697:
698: &logthis("Installing new $tablefile contents:\n$contents");
699: if(!InstallFile($tablefile, $contents)) {
700: &logthis('<font color="red"> Pushfile: unable to install '
701: .$tablefile." $! </font>");
702: return "error:$!";
703: } else {
704: &logthis('<font color="green"> Installed new '.$tablefile
705: ." - transaction by: $clientname ($clientip)</font>");
706: my $adminmail = $perlvar{'lonAdmEMail'};
707: my $admindom = &Apache::lonnet::host_domain($perlvar{'lonHostID'});
708: if ($admindom ne '') {
709: my %domconfig =
710: &Apache::lonnet::get_dom('configuration',['contacts'],$admindom);
711: if (ref($domconfig{'contacts'}) eq 'HASH') {
712: if ($domconfig{'contacts'}{'adminemail'} ne '') {
713: $adminmail = $domconfig{'contacts'}{'adminemail'};
714: }
715: }
716: }
717: if ($adminmail =~ /^[^\@]+\@[^\@]+$/) {
718: my $msg = new Mail::Send;
719: $msg->to($adminmail);
720: $msg->subject('LON-CAPA DNS update on '.$perlvar{'lonHostID'});
721: $msg->add('Content-type','text/plain; charset=UTF-8');
722: if (my $fh = $msg->open()) {
723: print $fh 'Update to '.$tablefile.' from Cluster Manager '.
724: "$clientname ($clientip)\n";
725: $fh->close;
726: }
727: }
728: }
729:
730: # Indicate success:
731:
732: return "ok";
733:
734: }
735:
736: #
737: # Called to re-init either lonc or lond.
738: #
739: # Parameters:
740: # request - The full request by the client. This is of the form
741: # reinit:<process>
742: # where <process> is allowed to be either of
743: # lonc or lond
744: #
745: # Returns:
746: # The string to be sent back to the client either:
747: # ok - Everything worked just fine.
748: # error:why - There was a failure and why describes the reason.
749: #
750: #
751: sub ReinitProcess {
752: my $request = shift;
753:
754:
755: # separate the request (reinit) from the process identifier and
756: # validate it producing the name of the .pid file for the process.
757: #
758: #
759: my ($junk, $process) = split(":", $request);
760: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
761: if($process eq 'lonc') {
762: $processpidfile = $processpidfile."lonc.pid";
763: if (!open(PIDFILE, "< $processpidfile")) {
764: return "error:Open failed for $processpidfile";
765: }
766: my $loncpid = <PIDFILE>;
767: close(PIDFILE);
768: logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
769: ."</font>");
770: kill("USR2", $loncpid);
771: } elsif ($process eq 'lond') {
772: logthis('<font color="red"> Reinitializing self (lond) </font>');
773: &UpdateHosts; # Lond is us!!
774: } else {
775: &logthis('<font color="yellow" Invalid reinit request for '.$process
776: ."</font>");
777: return "error:Invalid process identifier $process";
778: }
779: return 'ok';
780: }
781: # Validate a line in a configuration file edit script:
782: # Validation includes:
783: # - Ensuring the command is valid.
784: # - Ensuring the command has sufficient parameters
785: # Parameters:
786: # scriptline - A line to validate (\n has been stripped for what it's worth).
787: #
788: # Return:
789: # 0 - Invalid scriptline.
790: # 1 - Valid scriptline
791: # NOTE:
792: # Only the command syntax is checked, not the executability of the
793: # command.
794: #
795: sub isValidEditCommand {
796: my $scriptline = shift;
797:
798: # Line elements are pipe separated:
799:
800: my ($command, $key, $newline) = split(/\|/, $scriptline);
801: &logthis('<font color="green"> isValideditCommand checking: '.
802: "Command = '$command', Key = '$key', Newline = '$newline' </font>\n");
803:
804: if ($command eq "delete") {
805: #
806: # key with no newline.
807: #
808: if( ($key eq "") || ($newline ne "")) {
809: return 0; # Must have key but no newline.
810: } else {
811: return 1; # Valid syntax.
812: }
813: } elsif ($command eq "replace") {
814: #
815: # key and newline:
816: #
817: if (($key eq "") || ($newline eq "")) {
818: return 0;
819: } else {
820: return 1;
821: }
822: } elsif ($command eq "append") {
823: if (($key ne "") && ($newline eq "")) {
824: return 1;
825: } else {
826: return 0;
827: }
828: } else {
829: return 0; # Invalid command.
830: }
831: return 0; # Should not get here!!!
832: }
833: #
834: # ApplyEdit - Applies an edit command to a line in a configuration
835: # file. It is the caller's responsiblity to validate the
836: # edit line.
837: # Parameters:
838: # $directive - A single edit directive to apply.
839: # Edit directives are of the form:
840: # append|newline - Appends a new line to the file.
841: # replace|key|newline - Replaces the line with key value 'key'
842: # delete|key - Deletes the line with key value 'key'.
843: # $editor - A config file editor object that contains the
844: # file being edited.
845: #
846: sub ApplyEdit {
847:
848: my ($directive, $editor) = @_;
849:
850: # Break the directive down into its command and its parameters
851: # (at most two at this point. The meaning of the parameters, if in fact
852: # they exist depends on the command).
853:
854: my ($command, $p1, $p2) = split(/\|/, $directive);
855:
856: if($command eq "append") {
857: $editor->Append($p1); # p1 - key p2 null.
858: } elsif ($command eq "replace") {
859: $editor->ReplaceLine($p1, $p2); # p1 - key p2 = newline.
860: } elsif ($command eq "delete") {
861: $editor->DeleteLine($p1); # p1 - key p2 null.
862: } else { # Should not get here!!!
863: die "Invalid command given to ApplyEdit $command"
864: }
865: }
866: #
867: # AdjustOurHost:
868: # Adjusts a host file stored in a configuration file editor object
869: # for the true IP address of this host. This is necessary for hosts
870: # that live behind a firewall.
871: # Those hosts have a publicly distributed IP of the firewall, but
872: # internally must use their actual IP. We assume that a given
873: # host only has a single IP interface for now.
874: # Formal Parameters:
875: # editor - The configuration file editor to adjust. This
876: # editor is assumed to contain a hosts.tab file.
877: # Strategy:
878: # - Figure out our hostname.
879: # - Lookup the entry for this host.
880: # - Modify the line to contain our IP
881: # - Do a replace for this host.
882: sub AdjustOurHost {
883: my $editor = shift;
884:
885: # figure out who I am.
886:
887: my $myHostName = $perlvar{'lonHostID'}; # LonCAPA hostname.
888:
889: # Get my host file entry.
890:
891: my $ConfigLine = $editor->Find($myHostName);
892: if(! (defined $ConfigLine)) {
893: die "AdjustOurHost - no entry for me in hosts file $myHostName";
894: }
895: # figure out my IP:
896: # Use the config line to get my hostname.
897: # Use gethostbyname to translate that into an IP address.
898: #
899: my ($id,$domain,$role,$name,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);
900: #
901: # Reassemble the config line from the elements in the list.
902: # Note that if the loncnew items were not present before, they will
903: # be now even if they would be empty
904: #
905: my $newConfigLine = $id;
906: foreach my $item ($domain, $role, $name, $maxcon, $idleto, $mincon) {
907: $newConfigLine .= ":".$item;
908: }
909: # Replace the line:
910:
911: $editor->ReplaceLine($id, $newConfigLine);
912:
913: }
914: #
915: # ReplaceConfigFile:
916: # Replaces a configuration file with the contents of a
917: # configuration file editor object.
918: # This is done by:
919: # - Copying the target file to <filename>.old
920: # - Writing the new file to <filename>.tmp
921: # - Moving <filename.tmp> -> <filename>
922: # This laborious process ensures that the system is never without
923: # a configuration file that's at least valid (even if the contents
924: # may be dated).
925: # Parameters:
926: # filename - Name of the file to modify... this is a full path.
927: # editor - Editor containing the file.
928: #
929: sub ReplaceConfigFile {
930:
931: my ($filename, $editor) = @_;
932:
933: CopyFile ($filename, $filename.".old");
934:
935: my $contents = $editor->Get(); # Get the contents of the file.
936:
937: InstallFile($filename, $contents);
938: }
939: #
940: #
941: # Called to edit a configuration table file
942: # Parameters:
943: # request - The entire command/request sent by lonc or lonManage
944: # Return:
945: # The reply to send to the client.
946: #
947: sub EditFile {
948: my $request = shift;
949:
950: # Split the command into it's pieces: edit:filetype:script
951:
952: my ($cmd, $filetype, $script) = split(/:/, $request,3); # : in script
953:
954: # Check the pre-coditions for success:
955:
956: if($cmd != "edit") { # Something is amiss afoot alack.
957: return "error:edit request detected, but request != 'edit'\n";
958: }
959: if( ($filetype ne "hosts") &&
960: ($filetype ne "domain")) {
961: return "error:edit requested with invalid file specifier: $filetype \n";
962: }
963:
964: # Split the edit script and check it's validity.
965:
966: my @scriptlines = split(/\n/, $script); # one line per element.
967: my $linecount = scalar(@scriptlines);
968: for(my $i = 0; $i < $linecount; $i++) {
969: chomp($scriptlines[$i]);
970: if(!isValidEditCommand($scriptlines[$i])) {
971: return "error:edit with bad script line: '$scriptlines[$i]' \n";
972: }
973: }
974:
975: # Execute the edit operation.
976: # - Create a config file editor for the appropriate file and
977: # - execute each command in the script:
978: #
979: my $configfile = ConfigFileFromSelector($filetype);
980: if (!(defined $configfile)) {
981: return "refused\n";
982: }
983: my $editor = ConfigFileEdit->new($configfile);
984:
985: for (my $i = 0; $i < $linecount; $i++) {
986: ApplyEdit($scriptlines[$i], $editor);
987: }
988: # If the file is the host file, ensure that our host is
989: # adjusted to have our ip:
990: #
991: if($filetype eq "host") {
992: AdjustOurHost($editor);
993: }
994: # Finally replace the current file with our file.
995: #
996: ReplaceConfigFile($configfile, $editor);
997:
998: return "ok\n";
999: }
1000:
1001: # read_profile
1002: #
1003: # Returns a set of specific entries from a user's profile file.
1004: # this is a utility function that is used by both get_profile_entry and
1005: # get_profile_entry_encrypted.
1006: #
1007: # Parameters:
1008: # udom - Domain in which the user exists.
1009: # uname - User's account name (loncapa account)
1010: # namespace - The profile namespace to open.
1011: # what - A set of & separated queries.
1012: # Returns:
1013: # If all ok: - The string that needs to be shipped back to the user.
1014: # If failure - A string that starts with error: followed by the failure
1015: # reason.. note that this probabyl gets shipped back to the
1016: # user as well.
1017: #
1018: sub read_profile {
1019: my ($udom, $uname, $namespace, $what) = @_;
1020:
1021: my $hashref = &tie_user_hash($udom, $uname, $namespace,
1022: &GDBM_READER());
1023: if ($hashref) {
1024: my @queries=split(/\&/,$what);
1025: if ($namespace eq 'roles') {
1026: @queries = map { &unescape($_); } @queries;
1027: }
1028: my $qresult='';
1029:
1030: for (my $i=0;$i<=$#queries;$i++) {
1031: $qresult.="$hashref->{$queries[$i]}&"; # Presumably failure gives empty string.
1032: }
1033: $qresult=~s/\&$//; # Remove trailing & from last lookup.
1034: if (&untie_user_hash($hashref)) {
1035: return $qresult;
1036: } else {
1037: return "error: ".($!+0)." untie (GDBM) Failed";
1038: }
1039: } else {
1040: if ($!+0 == 2) {
1041: return "error:No such file or GDBM reported bad block error";
1042: } else {
1043: return "error: ".($!+0)." tie (GDBM) Failed";
1044: }
1045: }
1046:
1047: }
1048: #--------------------- Request Handlers --------------------------------------------
1049: #
1050: # By convention each request handler registers itself prior to the sub
1051: # declaration:
1052: #
1053:
1054: #++
1055: #
1056: # Handles ping requests.
1057: # Parameters:
1058: # $cmd - the actual keyword that invoked us.
1059: # $tail - the tail of the request that invoked us.
1060: # $replyfd- File descriptor connected to the client
1061: # Implicit Inputs:
1062: # $currenthostid - Global variable that carries the name of the host we are
1063: # known as.
1064: # Returns:
1065: # 1 - Ok to continue processing.
1066: # 0 - Program should exit.
1067: # Side effects:
1068: # Reply information is sent to the client.
1069: sub ping_handler {
1070: my ($cmd, $tail, $client) = @_;
1071: Debug("$cmd $tail $client .. $currenthostid:");
1072:
1073: Reply( $client,\$currenthostid,"$cmd:$tail");
1074:
1075: return 1;
1076: }
1077: ®ister_handler("ping", \&ping_handler, 0, 1, 1); # Ping unencoded, client or manager.
1078:
1079: #++
1080: #
1081: # Handles pong requests. Pong replies with our current host id, and
1082: # the results of a ping sent to us via our lonc.
1083: #
1084: # Parameters:
1085: # $cmd - the actual keyword that invoked us.
1086: # $tail - the tail of the request that invoked us.
1087: # $replyfd- File descriptor connected to the client
1088: # Implicit Inputs:
1089: # $currenthostid - Global variable that carries the name of the host we are
1090: # connected to.
1091: # Returns:
1092: # 1 - Ok to continue processing.
1093: # 0 - Program should exit.
1094: # Side effects:
1095: # Reply information is sent to the client.
1096: sub pong_handler {
1097: my ($cmd, $tail, $replyfd) = @_;
1098:
1099: my $reply=&Apache::lonnet::reply("ping",$clientname);
1100: &Reply( $replyfd, "$currenthostid:$reply\n", "$cmd:$tail");
1101: return 1;
1102: }
1103: ®ister_handler("pong", \&pong_handler, 0, 1, 1); # Pong unencoded, client or manager
1104:
1105: #++
1106: # Called to establish an encrypted session key with the remote client.
1107: # Note that with secure lond, in most cases this function is never
1108: # invoked. Instead, the secure session key is established either
1109: # via a local file that's locked down tight and only lives for a short
1110: # time, or via an ssl tunnel...and is generated from a bunch-o-random
1111: # bits from /dev/urandom, rather than the predictable pattern used by
1112: # by this sub. This sub is only used in the old-style insecure
1113: # key negotiation.
1114: # Parameters:
1115: # $cmd - the actual keyword that invoked us.
1116: # $tail - the tail of the request that invoked us.
1117: # $replyfd- File descriptor connected to the client
1118: # Implicit Inputs:
1119: # $currenthostid - Global variable that carries the name of the host
1120: # known as.
1121: # $clientname - Global variable that carries the name of the host we're connected to.
1122: # Returns:
1123: # 1 - Ok to continue processing.
1124: # 0 - Program should exit.
1125: # Implicit Outputs:
1126: # Reply information is sent to the client.
1127: # $cipher is set with a reference to a new IDEA encryption object.
1128: #
1129: sub establish_key_handler {
1130: my ($cmd, $tail, $replyfd) = @_;
1131:
1132: my $buildkey=time.$$.int(rand 100000);
1133: $buildkey=~tr/1-6/A-F/;
1134: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
1135: my $key=$currenthostid.$clientname;
1136: $key=~tr/a-z/A-Z/;
1137: $key=~tr/G-P/0-9/;
1138: $key=~tr/Q-Z/0-9/;
1139: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
1140: $key=substr($key,0,32);
1141: my $cipherkey=pack("H32",$key);
1142: $cipher=new IDEA $cipherkey;
1143: &Reply($replyfd, \$buildkey, "$cmd:$tail");
1144:
1145: return 1;
1146:
1147: }
1148: ®ister_handler("ekey", \&establish_key_handler, 0, 1,1);
1149:
1150: # Handler for the load command. Returns the current system load average
1151: # to the requestor.
1152: #
1153: # Parameters:
1154: # $cmd - the actual keyword that invoked us.
1155: # $tail - the tail of the request that invoked us.
1156: # $replyfd- File descriptor connected to the client
1157: # Implicit Inputs:
1158: # $currenthostid - Global variable that carries the name of the host
1159: # known as.
1160: # $clientname - Global variable that carries the name of the host we're connected to.
1161: # Returns:
1162: # 1 - Ok to continue processing.
1163: # 0 - Program should exit.
1164: # Side effects:
1165: # Reply information is sent to the client.
1166: sub load_handler {
1167: my ($cmd, $tail, $replyfd) = @_;
1168:
1169:
1170:
1171: # Get the load average from /proc/loadavg and calculate it as a percentage of
1172: # the allowed load limit as set by the perl global variable lonLoadLim
1173:
1174: my $loadavg;
1175: my $loadfile=IO::File->new('/proc/loadavg');
1176:
1177: $loadavg=<$loadfile>;
1178: $loadavg =~ s/\s.*//g; # Extract the first field only.
1179:
1180: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1181:
1182: &Reply( $replyfd, \$loadpercent, "$cmd:$tail");
1183:
1184: return 1;
1185: }
1186: ®ister_handler("load", \&load_handler, 0, 1, 0);
1187:
1188: #
1189: # Process the userload request. This sub returns to the client the current
1190: # user load average. It can be invoked either by clients or managers.
1191: #
1192: # Parameters:
1193: # $cmd - the actual keyword that invoked us.
1194: # $tail - the tail of the request that invoked us.
1195: # $replyfd- File descriptor connected to the client
1196: # Implicit Inputs:
1197: # $currenthostid - Global variable that carries the name of the host
1198: # known as.
1199: # $clientname - Global variable that carries the name of the host we're connected to.
1200: # Returns:
1201: # 1 - Ok to continue processing.
1202: # 0 - Program should exit
1203: # Implicit inputs:
1204: # whatever the userload() function requires.
1205: # Implicit outputs:
1206: # the reply is written to the client.
1207: #
1208: sub user_load_handler {
1209: my ($cmd, $tail, $replyfd) = @_;
1210:
1211: my $userloadpercent=&Apache::lonnet::userload();
1212: &Reply($replyfd, \$userloadpercent, "$cmd:$tail");
1213:
1214: return 1;
1215: }
1216: ®ister_handler("userload", \&user_load_handler, 0, 1, 0);
1217:
1218: # Process a request for the authorization type of a user:
1219: # (userauth).
1220: #
1221: # Parameters:
1222: # $cmd - the actual keyword that invoked us.
1223: # $tail - the tail of the request that invoked us.
1224: # $replyfd- File descriptor connected to the client
1225: # Returns:
1226: # 1 - Ok to continue processing.
1227: # 0 - Program should exit
1228: # Implicit outputs:
1229: # The user authorization type is written to the client.
1230: #
1231: sub user_authorization_type {
1232: my ($cmd, $tail, $replyfd) = @_;
1233:
1234: my $userinput = "$cmd:$tail";
1235:
1236: # Pull the domain and username out of the command tail.
1237: # and call get_auth_type to determine the authentication type.
1238:
1239: my ($udom,$uname)=split(/:/,$tail);
1240: my $result = &get_auth_type($udom, $uname);
1241: if($result eq "nouser") {
1242: &Failure( $replyfd, "unknown_user\n", $userinput);
1243: } else {
1244: #
1245: # We only want to pass the second field from get_auth_type
1246: # for ^krb.. otherwise we'll be handing out the encrypted
1247: # password for internals e.g.
1248: #
1249: my ($type,$otherinfo) = split(/:/,$result);
1250: if($type =~ /^krb/) {
1251: $type = $result;
1252: } else {
1253: $type .= ':';
1254: }
1255: &Reply( $replyfd, \$type, $userinput);
1256: }
1257:
1258: return 1;
1259: }
1260: ®ister_handler("currentauth", \&user_authorization_type, 1, 1, 0);
1261:
1262: # Process a request by a manager to push a hosts or domain table
1263: # to us. We pick apart the command and pass it on to the subs
1264: # that already exist to do this.
1265: #
1266: # Parameters:
1267: # $cmd - the actual keyword that invoked us.
1268: # $tail - the tail of the request that invoked us.
1269: # $client - File descriptor connected to the client
1270: # Returns:
1271: # 1 - Ok to continue processing.
1272: # 0 - Program should exit
1273: # Implicit Output:
1274: # a reply is written to the client.
1275: sub push_file_handler {
1276: my ($cmd, $tail, $client) = @_;
1277: &Debug("In push file handler");
1278: my $userinput = "$cmd:$tail";
1279:
1280: # At this time we only know that the IP of our partner is a valid manager
1281: # the code below is a hook to do further authentication (e.g. to resolve
1282: # spoofing).
1283:
1284: my $cert = &GetCertificate($userinput);
1285: if(&ValidManager($cert)) {
1286: &Debug("Valid manager: $client");
1287:
1288: # Now presumably we have the bona fides of both the peer host and the
1289: # process making the request.
1290:
1291: my $reply = &PushFile($userinput);
1292: &Reply($client, \$reply, $userinput);
1293:
1294: } else {
1295: &logthis("push_file_handler $client is not valid");
1296: &Failure( $client, "refused\n", $userinput);
1297: }
1298: return 1;
1299: }
1300: ®ister_handler("pushfile", \&push_file_handler, 1, 0, 1);
1301:
1302: # The du_handler routine should be considered obsolete and is retained
1303: # for communication with legacy servers. Please see the du2_handler.
1304: #
1305: # du - list the disk usage of a directory recursively.
1306: #
1307: # note: stolen code from the ls file handler
1308: # under construction by Rick Banghart
1309: # .
1310: # Parameters:
1311: # $cmd - The command that dispatched us (du).
1312: # $ududir - The directory path to list... I'm not sure what this
1313: # is relative as things like ls:. return e.g.
1314: # no_such_dir.
1315: # $client - Socket open on the client.
1316: # Returns:
1317: # 1 - indicating that the daemon should not disconnect.
1318: # Side Effects:
1319: # The reply is written to $client.
1320: #
1321: sub du_handler {
1322: my ($cmd, $ududir, $client) = @_;
1323: ($ududir) = split(/:/,$ududir); # Make 'telnet' testing easier.
1324: my $userinput = "$cmd:$ududir";
1325:
1326: if ($ududir=~/\.\./ || $ududir!~m|^/home/httpd/|) {
1327: &Failure($client,"refused\n","$cmd:$ududir");
1328: return 1;
1329: }
1330: # Since $ududir could have some nasties in it,
1331: # we will require that ududir is a valid
1332: # directory. Just in case someone tries to
1333: # slip us a line like .;(cd /home/httpd rm -rf*)
1334: # etc.
1335: #
1336: if (-d $ududir) {
1337: my $total_size=0;
1338: my $code=sub {
1339: if ($_=~/\.\d+\./) { return;}
1340: if ($_=~/\.meta$/) { return;}
1341: if (-d $_) { return;}
1342: $total_size+=(stat($_))[7];
1343: };
1344: chdir($ududir);
1345: find($code,$ududir);
1346: $total_size=int($total_size/1024);
1347: &Reply($client,\$total_size,"$cmd:$ududir");
1348: } else {
1349: &Failure($client, "bad_directory:$ududir\n","$cmd:$ududir");
1350: }
1351: return 1;
1352: }
1353: ®ister_handler("du", \&du_handler, 0, 1, 0);
1354:
1355: # Please also see the du_handler, which is obsoleted by du2.
1356: # du2_handler differs from du_handler in that required path to directory
1357: # provided by &propath() is prepended in the handler instead of on the
1358: # client side.
1359: #
1360: # du2 - list the disk usage of a directory recursively.
1361: #
1362: # Parameters:
1363: # $cmd - The command that dispatched us (du).
1364: # $tail - The tail of the request that invoked us.
1365: # $tail is a : separated list of the following:
1366: # - $ududir - directory path to list (before prepending)
1367: # - $getpropath = 1 if &propath() should prepend
1368: # - $uname - username to use for &propath or user dir
1369: # - $udom - domain to use for &propath or user dir
1370: # All are escaped.
1371: # $client - Socket open on the client.
1372: # Returns:
1373: # 1 - indicating that the daemon should not disconnect.
1374: # Side Effects:
1375: # The reply is written to $client.
1376: #
1377:
1378: sub du2_handler {
1379: my ($cmd, $tail, $client) = @_;
1380: my ($ududir,$getpropath,$uname,$udom) = map { &unescape($_) } (split(/:/, $tail));
1381: my $userinput = "$cmd:$tail";
1382: if (($ududir=~/\.\./) || (($ududir!~m|^/home/httpd/|) && (!$getpropath))) {
1383: &Failure($client,"refused\n","$cmd:$tail");
1384: return 1;
1385: }
1386: if ($getpropath) {
1387: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
1388: $ududir = &propath($udom,$uname).'/'.$ududir;
1389: } else {
1390: &Failure($client,"refused\n","$cmd:$tail");
1391: return 1;
1392: }
1393: }
1394: # Since $ududir could have some nasties in it,
1395: # we will require that ududir is a valid
1396: # directory. Just in case someone tries to
1397: # slip us a line like .;(cd /home/httpd rm -rf*)
1398: # etc.
1399: #
1400: if (-d $ududir) {
1401: my $total_size=0;
1402: my $code=sub {
1403: if ($_=~/\.\d+\./) { return;}
1404: if ($_=~/\.meta$/) { return;}
1405: if (-d $_) { return;}
1406: $total_size+=(stat($_))[7];
1407: };
1408: chdir($ududir);
1409: find($code,$ududir);
1410: $total_size=int($total_size/1024);
1411: &Reply($client,\$total_size,"$cmd:$ududir");
1412: } else {
1413: &Failure($client, "bad_directory:$ududir\n","$cmd:$tail");
1414: }
1415: return 1;
1416: }
1417: ®ister_handler("du2", \&du2_handler, 0, 1, 0);
1418:
1419: #
1420: # The ls_handler routine should be considered obsolete and is retained
1421: # for communication with legacy servers. Please see the ls3_handler.
1422: #
1423: # ls - list the contents of a directory. For each file in the
1424: # selected directory the filename followed by the full output of
1425: # the stat function is returned. The returned info for each
1426: # file are separated by ':'. The stat fields are separated by &'s.
1427: #
1428: # If the requested path contains /../ or is:
1429: #
1430: # 1. for a directory, and the path does not begin with one of:
1431: # (a) /home/httpd/html/res/<domain>
1432: # (b) /home/httpd/html/userfiles/
1433: # (c) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/userfiles
1434: # or is:
1435: #
1436: # 2. for a file, and the path (after prepending) does not begin with one of:
1437: # (a) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/
1438: # (b) /home/httpd/html/res/<domain>/<username>/
1439: # (c) /home/httpd/html/userfiles/<domain>/<username>/
1440: #
1441: # the response will be "refused".
1442: #
1443: # Parameters:
1444: # $cmd - The command that dispatched us (ls).
1445: # $ulsdir - The directory path to list... I'm not sure what this
1446: # is relative as things like ls:. return e.g.
1447: # no_such_dir.
1448: # $client - Socket open on the client.
1449: # Returns:
1450: # 1 - indicating that the daemon should not disconnect.
1451: # Side Effects:
1452: # The reply is written to $client.
1453: #
1454: sub ls_handler {
1455: # obsoleted by ls2_handler
1456: my ($cmd, $ulsdir, $client) = @_;
1457:
1458: my $userinput = "$cmd:$ulsdir";
1459:
1460: my $obs;
1461: my $rights;
1462: my $ulsout='';
1463: my $ulsfn;
1464: if ($ulsdir =~m{/\.\./}) {
1465: &Failure($client,"refused\n",$userinput);
1466: return 1;
1467: }
1468: if (-e $ulsdir) {
1469: if(-d $ulsdir) {
1470: unless (($ulsdir =~ m{^/home/httpd/html/(res/$LONCAPA::match_domain|userfiles/)}) ||
1471: ($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/userfiles})) {
1472: &Failure($client,"refused\n",$userinput);
1473: return 1;
1474: }
1475: if (opendir(LSDIR,$ulsdir)) {
1476: while ($ulsfn=readdir(LSDIR)) {
1477: undef($obs);
1478: undef($rights);
1479: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1480: #We do some obsolete checking here
1481: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1482: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1483: my @obsolete=<FILE>;
1484: foreach my $obsolete (@obsolete) {
1485: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1486: if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
1487: }
1488: }
1489: $ulsout.=$ulsfn.'&'.join('&',@ulsstats);
1490: if($obs eq '1') { $ulsout.="&1"; }
1491: else { $ulsout.="&0"; }
1492: if($rights eq '1') { $ulsout.="&1:"; }
1493: else { $ulsout.="&0:"; }
1494: }
1495: closedir(LSDIR);
1496: }
1497: } else {
1498: unless (($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/}) ||
1499: ($ulsdir =~ m{^/home/httpd/html/(?:res|userfiles)/$LONCAPA::match_domain/$LONCAPA::match_name/})) {
1500: &Failure($client,"refused\n",$userinput);
1501: return 1;
1502: }
1503: my @ulsstats=stat($ulsdir);
1504: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1505: }
1506: } else {
1507: $ulsout='no_such_dir';
1508: }
1509: if ($ulsout eq '') { $ulsout='empty'; }
1510: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1511:
1512: return 1;
1513:
1514: }
1515: ®ister_handler("ls", \&ls_handler, 0, 1, 0);
1516:
1517: # The ls2_handler routine should be considered obsolete and is retained
1518: # for communication with legacy servers. Please see the ls3_handler.
1519: # Please also see the ls_handler, which was itself obsoleted by ls2.
1520: # ls2_handler differs from ls_handler in that it escapes its return
1521: # values before concatenating them together with ':'s.
1522: #
1523: # ls2 - list the contents of a directory. For each file in the
1524: # selected directory the filename followed by the full output of
1525: # the stat function is returned. The returned info for each
1526: # file are separated by ':'. The stat fields are separated by &'s.
1527: #
1528: # If the requested path contains /../ or is:
1529: #
1530: # 1. for a directory, and the path does not begin with one of:
1531: # (a) /home/httpd/html/res/<domain>
1532: # (b) /home/httpd/html/userfiles/
1533: # (c) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/userfiles
1534: # or is:
1535: #
1536: # 2. for a file, and the path (after prepending) does not begin with one of:
1537: # (a) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/
1538: # (b) /home/httpd/html/res/<domain>/<username>/
1539: # (c) /home/httpd/html/userfiles/<domain>/<username>/
1540: #
1541: # the response will be "refused".
1542: #
1543: # Parameters:
1544: # $cmd - The command that dispatched us (ls).
1545: # $ulsdir - The directory path to list... I'm not sure what this
1546: # is relative as things like ls:. return e.g.
1547: # no_such_dir.
1548: # $client - Socket open on the client.
1549: # Returns:
1550: # 1 - indicating that the daemon should not disconnect.
1551: # Side Effects:
1552: # The reply is written to $client.
1553: #
1554: sub ls2_handler {
1555: my ($cmd, $ulsdir, $client) = @_;
1556:
1557: my $userinput = "$cmd:$ulsdir";
1558:
1559: my $obs;
1560: my $rights;
1561: my $ulsout='';
1562: my $ulsfn;
1563: if ($ulsdir =~m{/\.\./}) {
1564: &Failure($client,"refused\n",$userinput);
1565: return 1;
1566: }
1567: if (-e $ulsdir) {
1568: if(-d $ulsdir) {
1569: unless (($ulsdir =~ m{^/home/httpd/html/(res/$LONCAPA::match_domain|userfiles/)}) ||
1570: ($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/userfiles})) {
1571: &Failure($client,"refused\n","$userinput");
1572: return 1;
1573: }
1574: if (opendir(LSDIR,$ulsdir)) {
1575: while ($ulsfn=readdir(LSDIR)) {
1576: undef($obs);
1577: undef($rights);
1578: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1579: #We do some obsolete checking here
1580: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1581: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1582: my @obsolete=<FILE>;
1583: foreach my $obsolete (@obsolete) {
1584: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1585: if($obsolete =~ m|(<copyright>)(default)|) {
1586: $rights = 1;
1587: }
1588: }
1589: }
1590: my $tmp = $ulsfn.'&'.join('&',@ulsstats);
1591: if ($obs eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1592: if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1593: $ulsout.= &escape($tmp).':';
1594: }
1595: closedir(LSDIR);
1596: }
1597: } else {
1598: unless (($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/}) ||
1599: ($ulsdir =~ m{^/home/httpd/html/(?:res|userfiles)/$LONCAPA::match_domain/$LONCAPA::match_name/})) {
1600: &Failure($client,"refused\n",$userinput);
1601: return 1;
1602: }
1603: my @ulsstats=stat($ulsdir);
1604: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1605: }
1606: } else {
1607: $ulsout='no_such_dir';
1608: }
1609: if ($ulsout eq '') { $ulsout='empty'; }
1610: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1611: return 1;
1612: }
1613: ®ister_handler("ls2", \&ls2_handler, 0, 1, 0);
1614: #
1615: # ls3 - list the contents of a directory. For each file in the
1616: # selected directory the filename followed by the full output of
1617: # the stat function is returned. The returned info for each
1618: # file are separated by ':'. The stat fields are separated by &'s.
1619: #
1620: # If the requested path (after prepending) contains /../ or is:
1621: #
1622: # 1. for a directory, and the path does not begin with one of:
1623: # (a) /home/httpd/html/res/<domain>
1624: # (b) /home/httpd/html/userfiles/
1625: # (c) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/userfiles
1626: # (d) /home/httpd/html/priv/<domain> and client is the homeserver
1627: #
1628: # or is:
1629: #
1630: # 2. for a file, and the path (after prepending) does not begin with one of:
1631: # (a) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/
1632: # (b) /home/httpd/html/res/<domain>/<username>/
1633: # (c) /home/httpd/html/userfiles/<domain>/<username>/
1634: # (d) /home/httpd/html/priv/<domain>/<username>/ and client is the homeserver
1635: #
1636: # the response will be "refused".
1637: #
1638: # Parameters:
1639: # $cmd - The command that dispatched us (ls).
1640: # $tail - The tail of the request that invoked us.
1641: # $tail is a : separated list of the following:
1642: # - $ulsdir - directory path to list (before prepending)
1643: # - $getpropath = 1 if &propath() should prepend
1644: # - $getuserdir = 1 if path to user dir in lonUsers should
1645: # prepend
1646: # - $alternate_root - path to prepend
1647: # - $uname - username to use for &propath or user dir
1648: # - $udom - domain to use for &propath or user dir
1649: # All of these except $getpropath and &getuserdir are escaped.
1650: # no_such_dir.
1651: # $client - Socket open on the client.
1652: # Returns:
1653: # 1 - indicating that the daemon should not disconnect.
1654: # Side Effects:
1655: # The reply is written to $client.
1656: #
1657:
1658: sub ls3_handler {
1659: my ($cmd, $tail, $client) = @_;
1660: my $userinput = "$cmd:$tail";
1661: my ($ulsdir,$getpropath,$getuserdir,$alternate_root,$uname,$udom) =
1662: split(/:/,$tail);
1663: if (defined($ulsdir)) {
1664: $ulsdir = &unescape($ulsdir);
1665: }
1666: if (defined($alternate_root)) {
1667: $alternate_root = &unescape($alternate_root);
1668: }
1669: if (defined($uname)) {
1670: $uname = &unescape($uname);
1671: }
1672: if (defined($udom)) {
1673: $udom = &unescape($udom);
1674: }
1675:
1676: my $dir_root = $perlvar{'lonDocRoot'};
1677: if (($getpropath) || ($getuserdir)) {
1678: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
1679: $dir_root = &propath($udom,$uname);
1680: $dir_root =~ s/\/$//;
1681: } else {
1682: &Failure($client,"refused\n",$userinput);
1683: return 1;
1684: }
1685: } elsif ($alternate_root ne '') {
1686: $dir_root = $alternate_root;
1687: }
1688: if (($dir_root ne '') && ($dir_root ne '/')) {
1689: if ($ulsdir =~ /^\//) {
1690: $ulsdir = $dir_root.$ulsdir;
1691: } else {
1692: $ulsdir = $dir_root.'/'.$ulsdir;
1693: }
1694: }
1695: if ($ulsdir =~m{/\.\./}) {
1696: &Failure($client,"refused\n",$userinput);
1697: return 1;
1698: }
1699: my $islocal;
1700: my @machine_ids = &Apache::lonnet::current_machine_ids();
1701: if (grep(/^\Q$clientname\E$/,@machine_ids)) {
1702: $islocal = 1;
1703: }
1704: my $obs;
1705: my $rights;
1706: my $ulsout='';
1707: my $ulsfn;
1708: if (-e $ulsdir) {
1709: if(-d $ulsdir) {
1710: unless (($getpropath) || ($getuserdir) ||
1711: ($ulsdir =~ m{^/home/httpd/html/(res/$LONCAPA::match_domain|userfiles/)}) ||
1712: ($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/userfiles}) ||
1713: (($ulsdir =~ m{^/home/httpd/html/priv/$LONCAPA::match_domain}) && ($islocal))) {
1714: &Failure($client,"refused\n",$userinput);
1715: return 1;
1716: }
1717: if (opendir(LSDIR,$ulsdir)) {
1718: while ($ulsfn=readdir(LSDIR)) {
1719: undef($obs);
1720: undef($rights);
1721: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1722: #We do some obsolete checking here
1723: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1724: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1725: my @obsolete=<FILE>;
1726: foreach my $obsolete (@obsolete) {
1727: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1728: if($obsolete =~ m|(<copyright>)(default)|) {
1729: $rights = 1;
1730: }
1731: }
1732: }
1733: my $tmp = $ulsfn.'&'.join('&',@ulsstats);
1734: if ($obs eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1735: if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1736: $ulsout.= &escape($tmp).':';
1737: }
1738: closedir(LSDIR);
1739: }
1740: } else {
1741: unless (($getpropath) || ($getuserdir) ||
1742: ($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/}) ||
1743: ($ulsdir =~ m{^/home/httpd/html/(?:res|userfiles)/$LONCAPA::match_domain/$LONCAPA::match_name/}) ||
1744: (($ulsdir =~ m{^/home/httpd/html/priv/$LONCAPA::match_domain/$LONCAPA::match_name/}) && ($islocal))) {
1745: &Failure($client,"refused\n",$userinput);
1746: return 1;
1747: }
1748: my @ulsstats=stat($ulsdir);
1749: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1750: }
1751: } else {
1752: $ulsout='no_such_dir';
1753: }
1754: if ($ulsout eq '') { $ulsout='empty'; }
1755: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1756: return 1;
1757: }
1758: ®ister_handler("ls3", \&ls3_handler, 0, 1, 0);
1759:
1760: sub read_lonnet_global {
1761: my ($cmd,$tail,$client) = @_;
1762: my $userinput = "$cmd:$tail";
1763: my $requested = &Apache::lonnet::thaw_unescape($tail);
1764: my $result;
1765: my %packagevars = (
1766: spareid => \%Apache::lonnet::spareid,
1767: perlvar => \%Apache::lonnet::perlvar,
1768: );
1769: my %limit_to = (
1770: perlvar => {
1771: lonOtherAuthen => 1,
1772: lonBalancer => 1,
1773: lonVersion => 1,
1774: lonSysEMail => 1,
1775: lonHostID => 1,
1776: lonRole => 1,
1777: lonDefDomain => 1,
1778: lonLoadLim => 1,
1779: lonUserLoadLim => 1,
1780: }
1781: );
1782: if (ref($requested) eq 'HASH') {
1783: foreach my $what (keys(%{$requested})) {
1784: my $response;
1785: my $items = {};
1786: if (exists($packagevars{$what})) {
1787: if (ref($limit_to{$what}) eq 'HASH') {
1788: foreach my $varname (keys(%{$packagevars{$what}})) {
1789: if ($limit_to{$what}{$varname}) {
1790: $items->{$varname} = $packagevars{$what}{$varname};
1791: }
1792: }
1793: } else {
1794: $items = $packagevars{$what};
1795: }
1796: if ($what eq 'perlvar') {
1797: if (!exists($packagevars{$what}{'lonBalancer'})) {
1798: if ($dist =~ /^(centos|rhes|fedora|scientific|oracle)/) {
1799: my $othervarref=LONCAPA::Configuration::read_conf('httpd.conf');
1800: if (ref($othervarref) eq 'HASH') {
1801: $items->{'lonBalancer'} = $othervarref->{'lonBalancer'};
1802: }
1803: }
1804: }
1805: }
1806: $response = &Apache::lonnet::freeze_escape($items);
1807: }
1808: $result .= &escape($what).'='.$response.'&';
1809: }
1810: }
1811: $result =~ s/\&$//;
1812: &Reply($client,\$result,$userinput);
1813: return 1;
1814: }
1815: ®ister_handler("readlonnetglobal", \&read_lonnet_global, 0, 1, 0);
1816:
1817: sub server_devalidatecache_handler {
1818: my ($cmd,$tail,$client) = @_;
1819: my $userinput = "$cmd:$tail";
1820: my $items = &unescape($tail);
1821: my @cached = split(/\&/,$items);
1822: foreach my $key (@cached) {
1823: if ($key =~ /:/) {
1824: my ($name,$id) = map { &unescape($_); } split(/:/,$key);
1825: &Apache::lonnet::devalidate_cache_new($name,$id);
1826: }
1827: }
1828: my $result = 'ok';
1829: &Reply($client,\$result,$userinput);
1830: return 1;
1831: }
1832: ®ister_handler("devalidatecache", \&server_devalidatecache_handler, 0, 1, 0);
1833:
1834: sub server_timezone_handler {
1835: my ($cmd,$tail,$client) = @_;
1836: my $userinput = "$cmd:$tail";
1837: my $timezone;
1838: my $clockfile = '/etc/sysconfig/clock'; # Fedora/CentOS/SuSE
1839: my $tzfile = '/etc/timezone'; # Debian/Ubuntu
1840: if (-e $clockfile) {
1841: if (open(my $fh,"<$clockfile")) {
1842: while (<$fh>) {
1843: next if (/^[\#\s]/);
1844: if (/^(?:TIME)?ZONE\s*=\s*['"]?\s*([\w\/]+)/) {
1845: $timezone = $1;
1846: last;
1847: }
1848: }
1849: close($fh);
1850: }
1851: } elsif (-e $tzfile) {
1852: if (open(my $fh,"<$tzfile")) {
1853: $timezone = <$fh>;
1854: close($fh);
1855: chomp($timezone);
1856: if ($timezone =~ m{^Etc/(\w+)$}) {
1857: $timezone = $1;
1858: }
1859: }
1860: }
1861: &Reply($client,\$timezone,$userinput); # This supports debug logging.
1862: return 1;
1863: }
1864: ®ister_handler("servertimezone", \&server_timezone_handler, 0, 1, 0);
1865:
1866: sub server_loncaparev_handler {
1867: my ($cmd,$tail,$client) = @_;
1868: my $userinput = "$cmd:$tail";
1869: &Reply($client,\$perlvar{'lonVersion'},$userinput);
1870: return 1;
1871: }
1872: ®ister_handler("serverloncaparev", \&server_loncaparev_handler, 0, 1, 0);
1873:
1874: sub server_homeID_handler {
1875: my ($cmd,$tail,$client) = @_;
1876: my $userinput = "$cmd:$tail";
1877: &Reply($client,\$perlvar{'lonHostID'},$userinput);
1878: return 1;
1879: }
1880: ®ister_handler("serverhomeID", \&server_homeID_handler, 0, 1, 0);
1881:
1882: sub server_distarch_handler {
1883: my ($cmd,$tail,$client) = @_;
1884: my $userinput = "$cmd:$tail";
1885: my $reply = &distro_and_arch();
1886: &Reply($client,\$reply,$userinput);
1887: return 1;
1888: }
1889: ®ister_handler("serverdistarch", \&server_distarch_handler, 0, 1, 0);
1890:
1891: # Process a reinit request. Reinit requests that either
1892: # lonc or lond be reinitialized so that an updated
1893: # host.tab or domain.tab can be processed.
1894: #
1895: # Parameters:
1896: # $cmd - the actual keyword that invoked us.
1897: # $tail - the tail of the request that invoked us.
1898: # $client - File descriptor connected to the client
1899: # Returns:
1900: # 1 - Ok to continue processing.
1901: # 0 - Program should exit
1902: # Implicit output:
1903: # a reply is sent to the client.
1904: #
1905: sub reinit_process_handler {
1906: my ($cmd, $tail, $client) = @_;
1907:
1908: my $userinput = "$cmd:$tail";
1909:
1910: my $cert = &GetCertificate($userinput);
1911: if(&ValidManager($cert)) {
1912: chomp($userinput);
1913: my $reply = &ReinitProcess($userinput);
1914: &Reply( $client, \$reply, $userinput);
1915: } else {
1916: &Failure( $client, "refused\n", $userinput);
1917: }
1918: return 1;
1919: }
1920: ®ister_handler("reinit", \&reinit_process_handler, 1, 0, 1);
1921:
1922: # Process the editing script for a table edit operation.
1923: # the editing operation must be encrypted and requested by
1924: # a manager host.
1925: #
1926: # Parameters:
1927: # $cmd - the actual keyword that invoked us.
1928: # $tail - the tail of the request that invoked us.
1929: # $client - File descriptor connected to the client
1930: # Returns:
1931: # 1 - Ok to continue processing.
1932: # 0 - Program should exit
1933: # Implicit output:
1934: # a reply is sent to the client.
1935: #
1936: sub edit_table_handler {
1937: my ($command, $tail, $client) = @_;
1938:
1939: my $userinput = "$command:$tail";
1940:
1941: my $cert = &GetCertificate($userinput);
1942: if(&ValidManager($cert)) {
1943: my($filetype, $script) = split(/:/, $tail);
1944: if (($filetype eq "hosts") ||
1945: ($filetype eq "domain")) {
1946: if($script ne "") {
1947: &Reply($client, # BUGBUG - EditFile
1948: &EditFile($userinput), # could fail.
1949: $userinput);
1950: } else {
1951: &Failure($client,"refused\n",$userinput);
1952: }
1953: } else {
1954: &Failure($client,"refused\n",$userinput);
1955: }
1956: } else {
1957: &Failure($client,"refused\n",$userinput);
1958: }
1959: return 1;
1960: }
1961: ®ister_handler("edit", \&edit_table_handler, 1, 0, 1);
1962:
1963: #
1964: # Authenticate a user against the LonCAPA authentication
1965: # database. Note that there are several authentication
1966: # possibilities:
1967: # - unix - The user can be authenticated against the unix
1968: # password file.
1969: # - internal - The user can be authenticated against a purely
1970: # internal per user password file.
1971: # - kerberos - The user can be authenticated against either a kerb4 or kerb5
1972: # ticket granting authority.
1973: # - user - The person tailoring LonCAPA can supply a user authentication
1974: # mechanism that is per system.
1975: #
1976: # Parameters:
1977: # $cmd - The command that got us here.
1978: # $tail - Tail of the command (remaining parameters).
1979: # $client - File descriptor connected to client.
1980: # Returns
1981: # 0 - Requested to exit, caller should shut down.
1982: # 1 - Continue processing.
1983: # Implicit inputs:
1984: # The authentication systems describe above have their own forms of implicit
1985: # input into the authentication process that are described above.
1986: #
1987: sub authenticate_handler {
1988: my ($cmd, $tail, $client) = @_;
1989:
1990:
1991: # Regenerate the full input line
1992:
1993: my $userinput = $cmd.":".$tail;
1994:
1995: # udom - User's domain.
1996: # uname - Username.
1997: # upass - User's password.
1998: # checkdefauth - Pass to validate_user() to try authentication
1999: # with default auth type(s) if no user account.
2000: # clientcancheckhost - Passed by clients with functionality in lonauth.pm
2001: # to check if session can be hosted.
2002:
2003: my ($udom, $uname, $upass, $checkdefauth, $clientcancheckhost)=split(/:/,$tail);
2004: &Debug(" Authenticate domain = $udom, user = $uname, password = $upass, checkdefauth = $checkdefauth");
2005: chomp($upass);
2006: $upass=&unescape($upass);
2007:
2008: my $pwdcorrect = &validate_user($udom,$uname,$upass,$checkdefauth);
2009: if($pwdcorrect) {
2010: my $canhost = 1;
2011: unless ($clientcancheckhost) {
2012: my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
2013: my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
2014: my @intdoms;
2015: my $internet_names = &Apache::lonnet::get_internet_names($clientname);
2016: if (ref($internet_names) eq 'ARRAY') {
2017: @intdoms = @{$internet_names};
2018: }
2019: unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
2020: my ($remote,$hosted);
2021: my $remotesession = &get_usersession_config($udom,'remotesession');
2022: if (ref($remotesession) eq 'HASH') {
2023: $remote = $remotesession->{'remote'};
2024: }
2025: my $hostedsession = &get_usersession_config($clienthomedom,'hostedsession');
2026: if (ref($hostedsession) eq 'HASH') {
2027: $hosted = $hostedsession->{'hosted'};
2028: }
2029: my $loncaparev = $clientversion;
2030: if ($loncaparev eq '') {
2031: $loncaparev = $Apache::lonnet::loncaparevs{$clientname};
2032: }
2033: $canhost = &Apache::lonnet::can_host_session($udom,$clientname,
2034: $loncaparev,
2035: $remote,$hosted);
2036: }
2037: }
2038: if ($canhost) {
2039: &Reply( $client, "authorized\n", $userinput);
2040: } else {
2041: &Reply( $client, "not_allowed_to_host\n", $userinput);
2042: }
2043: #
2044: # Bad credentials: Failed to authorize
2045: #
2046: } else {
2047: &Failure( $client, "non_authorized\n", $userinput);
2048: }
2049:
2050: return 1;
2051: }
2052: ®ister_handler("auth", \&authenticate_handler, 1, 1, 0);
2053:
2054: #
2055: # Change a user's password. Note that this function is complicated by
2056: # the fact that a user may be authenticated in more than one way:
2057: # At present, we are not able to change the password for all types of
2058: # authentication methods. Only for:
2059: # unix - unix password or shadow passoword style authentication.
2060: # local - Locally written authentication mechanism.
2061: # For now, kerb4 and kerb5 password changes are not supported and result
2062: # in an error.
2063: # FUTURE WORK:
2064: # Support kerberos passwd changes?
2065: # Parameters:
2066: # $cmd - The command that got us here.
2067: # $tail - Tail of the command (remaining parameters).
2068: # $client - File descriptor connected to client.
2069: # Returns
2070: # 0 - Requested to exit, caller should shut down.
2071: # 1 - Continue processing.
2072: # Implicit inputs:
2073: # The authentication systems describe above have their own forms of implicit
2074: # input into the authentication process that are described above.
2075: sub change_password_handler {
2076: my ($cmd, $tail, $client) = @_;
2077:
2078: my $userinput = $cmd.":".$tail; # Reconstruct client's string.
2079:
2080: #
2081: # udom - user's domain.
2082: # uname - Username.
2083: # upass - Current password.
2084: # npass - New password.
2085: # context - Context in which this was called
2086: # (preferences or reset_by_email).
2087: # lonhost - HostID of server where request originated
2088:
2089: my ($udom,$uname,$upass,$npass,$context,$lonhost)=split(/:/,$tail);
2090:
2091: $upass=&unescape($upass);
2092: $npass=&unescape($npass);
2093: &Debug("Trying to change password for $uname");
2094:
2095: # First require that the user can be authenticated with their
2096: # old password unless context was 'reset_by_email':
2097:
2098: my ($validated,$failure);
2099: if ($context eq 'reset_by_email') {
2100: if ($lonhost eq '') {
2101: $failure = 'invalid_client';
2102: } else {
2103: $validated = 1;
2104: }
2105: } else {
2106: $validated = &validate_user($udom, $uname, $upass);
2107: }
2108: if($validated) {
2109: my $realpasswd = &get_auth_type($udom, $uname); # Defined since authd.
2110: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
2111: my $notunique;
2112: if ($howpwd eq 'internal') {
2113: &Debug("internal auth");
2114: my $ncpass = &hash_passwd($udom,$npass);
2115: my (undef,$method,@rest) = split(/!/,$contentpwd);
2116: if ($method eq 'bcrypt') {
2117: my %passwdconf = &Apache::lonnet::get_passwdconf($udom);
2118: if (($passwdconf{'numsaved'}) && ($passwdconf{'numsaved'} =~ /^\d+$/)) {
2119: my @oldpasswds;
2120: my $userpath = &propath($udom,$uname);
2121: my $fullpath = $userpath.'/oldpasswds';
2122: if (-d $userpath) {
2123: my @oldfiles;
2124: if (-e $fullpath) {
2125: if (opendir(my $dir,$fullpath)) {
2126: (@oldfiles) = grep(/^\d+$/,readdir($dir));
2127: closedir($dir);
2128: }
2129: if (@oldfiles) {
2130: @oldfiles = sort { $b <=> $a } (@oldfiles);
2131: my $numremoved = 0;
2132: for (my $i=0; $i<@oldfiles; $i++) {
2133: if ($i>=$passwdconf{'numsaved'}) {
2134: if (-f "$fullpath/$oldfiles[$i]") {
2135: if (unlink("$fullpath/$oldfiles[$i]")) {
2136: $numremoved ++;
2137: }
2138: }
2139: } elsif (open(my $fh,'<',"$fullpath/$oldfiles[$i]")) {
2140: while (my $line = <$fh>) {
2141: push(@oldpasswds,$line);
2142: }
2143: close($fh);
2144: }
2145: }
2146: if ($numremoved) {
2147: &logthis("unlinked $numremoved old password files for $uname:$udom");
2148: }
2149: }
2150: }
2151: push(@oldpasswds,$contentpwd);
2152: foreach my $item (@oldpasswds) {
2153: my (undef,$method,@rest) = split(/!/,$item);
2154: if ($method eq 'bcrypt') {
2155: my $result = &hash_passwd($udom,$npass,@rest);
2156: if ($result eq $item) {
2157: $notunique = 1;
2158: last;
2159: }
2160: }
2161: }
2162: unless ($notunique) {
2163: unless (-e $fullpath) {
2164: if (&mkpath("$fullpath/")) {
2165: chmod(0700,$fullpath);
2166: }
2167: }
2168: if (-d $fullpath) {
2169: my $now = time;
2170: if (open(my $fh,'>',"$fullpath/$now")) {
2171: print $fh $contentpwd;
2172: close($fh);
2173: chmod(0400,"$fullpath/$now");
2174: }
2175: }
2176: }
2177: }
2178: }
2179: }
2180: if ($notunique) {
2181: my $msg="Result of password change for $uname:$udom - password matches one used before";
2182: if ($lonhost) {
2183: $msg .= " - request originated from: $lonhost";
2184: }
2185: &logthis($msg);
2186: &Reply($client, "prioruse\n", $userinput);
2187: } elsif (&rewrite_password_file($udom, $uname, "internal:$ncpass")) {
2188: my $msg="Result of password change for $uname: pwchange_success";
2189: if ($lonhost) {
2190: $msg .= " - request originated from: $lonhost";
2191: }
2192: &logthis($msg);
2193: &update_passwd_history($uname,$udom,$howpwd,$context);
2194: &Reply($client, "ok\n", $userinput);
2195: } else {
2196: &logthis("Unable to open $uname passwd "
2197: ."to change password");
2198: &Failure( $client, "non_authorized\n",$userinput);
2199: }
2200: } elsif ($howpwd eq 'unix' && $context ne 'reset_by_email') {
2201: my $result = &change_unix_password($uname, $npass);
2202: if ($result eq 'ok') {
2203: &update_passwd_history($uname,$udom,$howpwd,$context);
2204: }
2205: &logthis("Result of password change for $uname: ".
2206: $result);
2207: &Reply($client, \$result, $userinput);
2208: } else {
2209: # this just means that the current password mode is not
2210: # one we know how to change (e.g the kerberos auth modes or
2211: # locally written auth handler).
2212: #
2213: &Failure( $client, "auth_mode_error\n", $userinput);
2214: }
2215: } else {
2216: if ($failure eq '') {
2217: $failure = 'non_authorized';
2218: }
2219: &Failure( $client, "$failure\n", $userinput);
2220: }
2221:
2222: return 1;
2223: }
2224: ®ister_handler("passwd", \&change_password_handler, 1, 1, 0);
2225:
2226: sub hash_passwd {
2227: my ($domain,$plainpass,@rest) = @_;
2228: my ($salt,$cost);
2229: if (@rest) {
2230: $cost = $rest[0];
2231: # salt is first 22 characters, base-64 encoded by bcrypt
2232: my $plainsalt = substr($rest[1],0,22);
2233: $salt = Crypt::Eksblowfish::Bcrypt::de_base64($plainsalt);
2234: } else {
2235: my %domdefaults = &Apache::lonnet::get_domain_defaults($domain);
2236: my $defaultcost = $domdefaults{'intauth_cost'};
2237: if (($defaultcost eq '') || ($defaultcost =~ /D/)) {
2238: $cost = 10;
2239: } else {
2240: $cost = $defaultcost;
2241: }
2242: # Generate random 16-octet base64 salt
2243: $salt = "";
2244: $salt .= pack("C", int rand(256)) for 1..16;
2245: }
2246: my $hash = &Crypt::Eksblowfish::Bcrypt::bcrypt_hash({
2247: key_nul => 1,
2248: cost => $cost,
2249: salt => $salt,
2250: }, Digest::SHA::sha512(Encode::encode('UTF-8',$plainpass)));
2251:
2252: my $result = join("!", "", "bcrypt", sprintf("%02d",$cost),
2253: &Crypt::Eksblowfish::Bcrypt::en_base64($salt).
2254: &Crypt::Eksblowfish::Bcrypt::en_base64($hash));
2255: return $result;
2256: }
2257:
2258: #
2259: # Create a new user. User in this case means a lon-capa user.
2260: # The user must either already exist in some authentication realm
2261: # like kerberos or the /etc/passwd. If not, a user completely local to
2262: # this loncapa system is created.
2263: #
2264: # Parameters:
2265: # $cmd - The command that got us here.
2266: # $tail - Tail of the command (remaining parameters).
2267: # $client - File descriptor connected to client.
2268: # Returns
2269: # 0 - Requested to exit, caller should shut down.
2270: # 1 - Continue processing.
2271: # Implicit inputs:
2272: # The authentication systems describe above have their own forms of implicit
2273: # input into the authentication process that are described above.
2274: sub add_user_handler {
2275:
2276: my ($cmd, $tail, $client) = @_;
2277:
2278:
2279: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
2280: my $userinput = $cmd.":".$tail; # Reconstruct the full request line.
2281:
2282: &Debug("cmd =".$cmd." $udom =".$udom." uname=".$uname);
2283:
2284:
2285: if($udom eq $currentdomainid) { # Reject new users for other domains...
2286:
2287: my $oldumask=umask(0077);
2288: chomp($npass);
2289: $npass=&unescape($npass);
2290: my $passfilename = &password_path($udom, $uname);
2291: &Debug("Password file created will be:".$passfilename);
2292: if (-e $passfilename) {
2293: &Failure( $client, "already_exists\n", $userinput);
2294: } else {
2295: my $fperror='';
2296: if (!&mkpath($passfilename)) {
2297: $fperror="error: ".($!+0)." mkdir failed while attempting "
2298: ."makeuser";
2299: }
2300: unless ($fperror) {
2301: my $result=&make_passwd_file($uname,$udom,$umode,$npass,
2302: $passfilename,'makeuser');
2303: &Reply($client,\$result, $userinput); #BUGBUG - could be fail
2304: } else {
2305: &Failure($client, \$fperror, $userinput);
2306: }
2307: }
2308: umask($oldumask);
2309: } else {
2310: &Failure($client, "not_right_domain\n",
2311: $userinput); # Even if we are multihomed.
2312:
2313: }
2314: return 1;
2315:
2316: }
2317: ®ister_handler("makeuser", \&add_user_handler, 1, 1, 0);
2318:
2319: #
2320: # Change the authentication method of a user. Note that this may
2321: # also implicitly change the user's password if, for example, the user is
2322: # joining an existing authentication realm. Known authentication realms at
2323: # this time are:
2324: # internal - Purely internal password file (only loncapa knows this user)
2325: # local - Institutionally written authentication module.
2326: # unix - Unix user (/etc/passwd with or without /etc/shadow).
2327: # kerb4 - kerberos version 4
2328: # kerb5 - kerberos version 5
2329: #
2330: # Parameters:
2331: # $cmd - The command that got us here.
2332: # $tail - Tail of the command (remaining parameters).
2333: # $client - File descriptor connected to client.
2334: # Returns
2335: # 0 - Requested to exit, caller should shut down.
2336: # 1 - Continue processing.
2337: # Implicit inputs:
2338: # The authentication systems describe above have their own forms of implicit
2339: # input into the authentication process that are described above.
2340: # NOTE:
2341: # This is also used to change the authentication credential values (e.g. passwd).
2342: #
2343: #
2344: sub change_authentication_handler {
2345:
2346: my ($cmd, $tail, $client) = @_;
2347:
2348: my $userinput = "$cmd:$tail"; # Reconstruct user input.
2349:
2350: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
2351: &Debug("cmd = ".$cmd." domain= ".$udom."uname =".$uname." umode= ".$umode);
2352: if ($udom ne $currentdomainid) {
2353: &Failure( $client, "not_right_domain\n", $client);
2354: } else {
2355:
2356: chomp($npass);
2357:
2358: $npass=&unescape($npass);
2359: my $oldauth = &get_auth_type($udom, $uname); # Get old auth info.
2360: my $passfilename = &password_path($udom, $uname);
2361: if ($passfilename) { # Not allowed to create a new user!!
2362: # If just changing the unix passwd. need to arrange to run
2363: # passwd since otherwise make_passwd_file will fail as
2364: # creation of unix authenticated users is no longer supported
2365: # except from the command line, when running make_domain_coordinator.pl
2366:
2367: if(($oldauth =~/^unix/) && ($umode eq "unix")) {
2368: my $result = &change_unix_password($uname, $npass);
2369: &logthis("Result of password change for $uname: ".$result);
2370: if ($result eq "ok") {
2371: &update_passwd_history($uname,$udom,$umode,'changeuserauth');
2372: &Reply($client, \$result);
2373: } else {
2374: &Failure($client, \$result);
2375: }
2376: } else {
2377: my $result=&make_passwd_file($uname,$udom,$umode,$npass,
2378: $passfilename,'changeuserauth');
2379: #
2380: # If the current auth mode is internal, and the old auth mode was
2381: # unix, or krb*, and the user is an author for this domain,
2382: # re-run manage_permissions for that role in order to be able
2383: # to take ownership of the construction space back to www:www
2384: #
2385:
2386:
2387: &Reply($client, \$result, $userinput);
2388: }
2389:
2390:
2391: } else {
2392: &Failure($client, "non_authorized\n", $userinput); # Fail the user now.
2393: }
2394: }
2395: return 1;
2396: }
2397: ®ister_handler("changeuserauth", \&change_authentication_handler, 1,1, 0);
2398:
2399: sub update_passwd_history {
2400: my ($uname,$udom,$umode,$context) = @_;
2401: my $proname=&propath($udom,$uname);
2402: my $now = time;
2403: if (open(my $fh,">>$proname/passwd.log")) {
2404: print $fh "$now:$umode:$context\n";
2405: close($fh);
2406: }
2407: return;
2408: }
2409:
2410: #
2411: # Determines if this is the home server for a user. The home server
2412: # for a user will have his/her lon-capa passwd file. Therefore all we need
2413: # to do is determine if this file exists.
2414: #
2415: # Parameters:
2416: # $cmd - The command that got us here.
2417: # $tail - Tail of the command (remaining parameters).
2418: # $client - File descriptor connected to client.
2419: # Returns
2420: # 0 - Requested to exit, caller should shut down.
2421: # 1 - Continue processing.
2422: # Implicit inputs:
2423: # The authentication systems describe above have their own forms of implicit
2424: # input into the authentication process that are described above.
2425: #
2426: sub is_home_handler {
2427: my ($cmd, $tail, $client) = @_;
2428:
2429: my $userinput = "$cmd:$tail";
2430:
2431: my ($udom,$uname)=split(/:/,$tail);
2432: chomp($uname);
2433: my $passfile = &password_filename($udom, $uname);
2434: if($passfile) {
2435: &Reply( $client, "found\n", $userinput);
2436: } else {
2437: &Failure($client, "not_found\n", $userinput);
2438: }
2439: return 1;
2440: }
2441: ®ister_handler("home", \&is_home_handler, 0,1,0);
2442:
2443: #
2444: # Process an update request for a resource.
2445: # A resource has been modified that we hold a subscription to.
2446: # If the resource is not local, then we must update, or at least invalidate our
2447: # cached copy of the resource.
2448: # Parameters:
2449: # $cmd - The command that got us here.
2450: # $tail - Tail of the command (remaining parameters).
2451: # $client - File descriptor connected to client.
2452: # Returns
2453: # 0 - Requested to exit, caller should shut down.
2454: # 1 - Continue processing.
2455: # Implicit inputs:
2456: # The authentication systems describe above have their own forms of implicit
2457: # input into the authentication process that are described above.
2458: #
2459: sub update_resource_handler {
2460:
2461: my ($cmd, $tail, $client) = @_;
2462:
2463: my $userinput = "$cmd:$tail";
2464:
2465: my $fname= $tail; # This allows interactive testing
2466:
2467:
2468: my $ownership=ishome($fname);
2469: if ($ownership eq 'not_owner') {
2470: if (-e $fname) {
2471: # Delete preview file, if exists
2472: unlink("$fname.tmp");
2473: # Get usage stats
2474: my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
2475: $atime,$mtime,$ctime,$blksize,$blocks)=stat($fname);
2476: my $now=time;
2477: my $since=$now-$atime;
2478: # If the file has not been used within lonExpire seconds,
2479: # unsubscribe from it and delete local copy
2480: if ($since>$perlvar{'lonExpire'}) {
2481: my $reply=&Apache::lonnet::reply("unsub:$fname","$clientname");
2482: &devalidate_meta_cache($fname);
2483: unlink("$fname");
2484: unlink("$fname.meta");
2485: } else {
2486: # Yes, this is in active use. Get a fresh copy. Since it might be in
2487: # very active use and huge (like a movie), copy it to "in.transfer" filename first.
2488: my $transname="$fname.in.transfer";
2489: my $remoteurl=&Apache::lonnet::reply("sub:$fname","$clientname");
2490: my $response;
2491: # FIXME: cannot replicate files that take more than two minutes to transfer?
2492: # alarm(120);
2493: # FIXME: this should use the LWP mechanism, not internal alarms.
2494: alarm(1200);
2495: {
2496: my $ua=new LWP::UserAgent;
2497: my $request=new HTTP::Request('GET',"$remoteurl");
2498: $response=$ua->request($request,$transname);
2499: }
2500: alarm(0);
2501: if ($response->is_error()) {
2502: my $reply=&Apache::lonnet::reply("unsub:$fname","$clientname");
2503: &devalidate_meta_cache($fname);
2504: if (-e $transname) {
2505: unlink($transname);
2506: }
2507: unlink($fname);
2508: my $message=$response->status_line;
2509: &logthis("LWP GET: $message for $fname ($remoteurl)");
2510: } else {
2511: if ($remoteurl!~/\.meta$/) {
2512: # FIXME: isn't there an internal LWP mechanism for this?
2513: alarm(120);
2514: {
2515: my $ua=new LWP::UserAgent;
2516: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
2517: my $mresponse=$ua->request($mrequest,$fname.'.meta');
2518: if ($mresponse->is_error()) {
2519: unlink($fname.'.meta');
2520: }
2521: }
2522: alarm(0);
2523: }
2524: # we successfully transfered, copy file over to real name
2525: rename($transname,$fname);
2526: &devalidate_meta_cache($fname);
2527: }
2528: }
2529: &Reply( $client, "ok\n", $userinput);
2530: } else {
2531: &Failure($client, "not_found\n", $userinput);
2532: }
2533: } else {
2534: &Failure($client, "rejected\n", $userinput);
2535: }
2536: return 1;
2537: }
2538: ®ister_handler("update", \&update_resource_handler, 0 ,1, 0);
2539:
2540: sub devalidate_meta_cache {
2541: my ($url) = @_;
2542: use Cache::Memcached;
2543: my $memcache = new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
2544: $url = &Apache::lonnet::declutter($url);
2545: $url =~ s-\.meta$--;
2546: my $id = &escape('meta:'.$url);
2547: $memcache->delete($id);
2548: }
2549:
2550: #
2551: # Fetch a user file from a remote server to the user's home directory
2552: # userfiles subdir.
2553: # Parameters:
2554: # $cmd - The command that got us here.
2555: # $tail - Tail of the command (remaining parameters).
2556: # $client - File descriptor connected to client.
2557: # Returns
2558: # 0 - Requested to exit, caller should shut down.
2559: # 1 - Continue processing.
2560: #
2561: sub fetch_user_file_handler {
2562:
2563: my ($cmd, $tail, $client) = @_;
2564:
2565: my $userinput = "$cmd:$tail";
2566: my $fname = $tail;
2567: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
2568: my $udir=&propath($udom,$uname).'/userfiles';
2569: unless (-e $udir) {
2570: mkdir($udir,0770);
2571: }
2572: Debug("fetch user file for $fname");
2573: if (-e $udir) {
2574: $ufile=~s/^[\.\~]+//;
2575:
2576: # IF necessary, create the path right down to the file.
2577: # Note that any regular files in the way of this path are
2578: # wiped out to deal with some earlier folly of mine.
2579:
2580: if (!&mkpath($udir.'/'.$ufile)) {
2581: &Failure($client, "unable_to_create\n", $userinput);
2582: }
2583:
2584: my $destname=$udir.'/'.$ufile;
2585: my $transname=$udir.'/'.$ufile.'.in.transit';
2586: my $clientprotocol=$Apache::lonnet::protocol{$clientname};
2587: $clientprotocol = 'http' if ($clientprotocol ne 'https');
2588: my $clienthost = &Apache::lonnet::hostname($clientname);
2589: my $remoteurl=$clientprotocol.'://'.$clienthost.'/userfiles/'.$fname;
2590: my $response;
2591: Debug("Remote URL : $remoteurl Transfername $transname Destname: $destname");
2592: alarm(120);
2593: {
2594: my $ua=new LWP::UserAgent;
2595: my $request=new HTTP::Request('GET',"$remoteurl");
2596: $response=$ua->request($request,$transname);
2597: }
2598: alarm(0);
2599: if ($response->is_error()) {
2600: unlink($transname);
2601: my $message=$response->status_line;
2602: &logthis("LWP GET: $message for $fname ($remoteurl)");
2603: &Failure($client, "failed\n", $userinput);
2604: } else {
2605: Debug("Renaming $transname to $destname");
2606: if (!rename($transname,$destname)) {
2607: &logthis("Unable to move $transname to $destname");
2608: unlink($transname);
2609: &Failure($client, "failed\n", $userinput);
2610: } else {
2611: if ($fname =~ /^default.+\.(page|sequence)$/) {
2612: my ($major,$minor) = split(/\./,$clientversion);
2613: if (($major < 2) || ($major == 2 && $minor < 11)) {
2614: my $now = time;
2615: &Apache::lonnet::do_cache_new('crschange',$udom.'_'.$uname,$now,600);
2616: my $key = &escape('internal.contentchange');
2617: my $what = "$key=$now";
2618: my $hashref = &tie_user_hash($udom,$uname,'environment',
2619: &GDBM_WRCREAT(),"P",$what);
2620: if ($hashref) {
2621: $hashref->{$key}=$now;
2622: if (!&untie_user_hash($hashref)) {
2623: &logthis("error: ".($!+0)." untie (GDBM) failed ".
2624: "when updating internal.contentchange");
2625: }
2626: }
2627: }
2628: }
2629: &Reply($client, "ok\n", $userinput);
2630: }
2631: }
2632: } else {
2633: &Failure($client, "not_home\n", $userinput);
2634: }
2635: return 1;
2636: }
2637: ®ister_handler("fetchuserfile", \&fetch_user_file_handler, 0, 1, 0);
2638:
2639: #
2640: # Remove a file from a user's home directory userfiles subdirectory.
2641: # Parameters:
2642: # cmd - the Lond request keyword that got us here.
2643: # tail - the part of the command past the keyword.
2644: # client- File descriptor connected with the client.
2645: #
2646: # Returns:
2647: # 1 - Continue processing.
2648: sub remove_user_file_handler {
2649: my ($cmd, $tail, $client) = @_;
2650:
2651: my ($fname) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2652:
2653: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
2654: if ($ufile =~m|/\.\./|) {
2655: # any files paths with /../ in them refuse
2656: # to deal with
2657: &Failure($client, "refused\n", "$cmd:$tail");
2658: } else {
2659: my $udir = &propath($udom,$uname);
2660: if (-e $udir) {
2661: my $file=$udir.'/userfiles/'.$ufile;
2662: if (-e $file) {
2663: #
2664: # If the file is a regular file unlink is fine...
2665: # However it's possible the client wants a dir
2666: # removed, in which case rmdir is more appropriate
2667: # Note: rmdir will only remove an empty directory.
2668: #
2669: if (-f $file){
2670: unlink($file);
2671: # for html files remove the associated .bak file
2672: # which may have been created by the editor.
2673: if ($ufile =~ m{^((docs|supplemental)/(?:\d+|default)/\d+(?:|/.+)/)[^/]+\.x?html?$}i) {
2674: my $path = $1;
2675: if (-e $file.'.bak') {
2676: unlink($file.'.bak');
2677: }
2678: }
2679: } elsif(-d $file) {
2680: rmdir($file);
2681: }
2682: if (-e $file) {
2683: # File is still there after we deleted it ?!?
2684:
2685: &Failure($client, "failed\n", "$cmd:$tail");
2686: } else {
2687: &Reply($client, "ok\n", "$cmd:$tail");
2688: }
2689: } else {
2690: &Failure($client, "not_found\n", "$cmd:$tail");
2691: }
2692: } else {
2693: &Failure($client, "not_home\n", "$cmd:$tail");
2694: }
2695: }
2696: return 1;
2697: }
2698: ®ister_handler("removeuserfile", \&remove_user_file_handler, 0,1,0);
2699:
2700: #
2701: # make a directory in a user's home directory userfiles subdirectory.
2702: # Parameters:
2703: # cmd - the Lond request keyword that got us here.
2704: # tail - the part of the command past the keyword.
2705: # client- File descriptor connected with the client.
2706: #
2707: # Returns:
2708: # 1 - Continue processing.
2709: sub mkdir_user_file_handler {
2710: my ($cmd, $tail, $client) = @_;
2711:
2712: my ($dir) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2713: $dir=&unescape($dir);
2714: my ($udom,$uname,$ufile) = ($dir =~ m|^([^/]+)/([^/]+)/(.+)$|);
2715: if ($ufile =~m|/\.\./|) {
2716: # any files paths with /../ in them refuse
2717: # to deal with
2718: &Failure($client, "refused\n", "$cmd:$tail");
2719: } else {
2720: my $udir = &propath($udom,$uname);
2721: if (-e $udir) {
2722: my $newdir=$udir.'/userfiles/'.$ufile.'/';
2723: if (!&mkpath($newdir)) {
2724: &Failure($client, "failed\n", "$cmd:$tail");
2725: }
2726: &Reply($client, "ok\n", "$cmd:$tail");
2727: } else {
2728: &Failure($client, "not_home\n", "$cmd:$tail");
2729: }
2730: }
2731: return 1;
2732: }
2733: ®ister_handler("mkdiruserfile", \&mkdir_user_file_handler, 0,1,0);
2734:
2735: #
2736: # rename a file in a user's home directory userfiles subdirectory.
2737: # Parameters:
2738: # cmd - the Lond request keyword that got us here.
2739: # tail - the part of the command past the keyword.
2740: # client- File descriptor connected with the client.
2741: #
2742: # Returns:
2743: # 1 - Continue processing.
2744: sub rename_user_file_handler {
2745: my ($cmd, $tail, $client) = @_;
2746:
2747: my ($udom,$uname,$old,$new) = split(/:/, $tail);
2748: $old=&unescape($old);
2749: $new=&unescape($new);
2750: if ($new =~m|/\.\./| || $old =~m|/\.\./|) {
2751: # any files paths with /../ in them refuse to deal with
2752: &Failure($client, "refused\n", "$cmd:$tail");
2753: } else {
2754: my $udir = &propath($udom,$uname);
2755: if (-e $udir) {
2756: my $oldfile=$udir.'/userfiles/'.$old;
2757: my $newfile=$udir.'/userfiles/'.$new;
2758: if (-e $newfile) {
2759: &Failure($client, "exists\n", "$cmd:$tail");
2760: } elsif (! -e $oldfile) {
2761: &Failure($client, "not_found\n", "$cmd:$tail");
2762: } else {
2763: if (!rename($oldfile,$newfile)) {
2764: &Failure($client, "failed\n", "$cmd:$tail");
2765: } else {
2766: &Reply($client, "ok\n", "$cmd:$tail");
2767: }
2768: }
2769: } else {
2770: &Failure($client, "not_home\n", "$cmd:$tail");
2771: }
2772: }
2773: return 1;
2774: }
2775: ®ister_handler("renameuserfile", \&rename_user_file_handler, 0,1,0);
2776:
2777: #
2778: # Checks if the specified user has an active session on the server
2779: # return ok if so, not_found if not
2780: #
2781: # Parameters:
2782: # cmd - The request keyword that dispatched to tus.
2783: # tail - The tail of the request (colon separated parameters).
2784: # client - Filehandle open on the client.
2785: # Return:
2786: # 1.
2787: sub user_has_session_handler {
2788: my ($cmd, $tail, $client) = @_;
2789:
2790: my ($udom, $uname) = map { &unescape($_) } (split(/:/, $tail));
2791:
2792: opendir(DIR,$perlvar{'lonIDsDir'});
2793: my $filename;
2794: while ($filename=readdir(DIR)) {
2795: last if ($filename=~/^\Q$uname\E_\d+_\Q$udom\E_/);
2796: }
2797: if ($filename) {
2798: &Reply($client, "ok\n", "$cmd:$tail");
2799: } else {
2800: &Failure($client, "not_found\n", "$cmd:$tail");
2801: }
2802: return 1;
2803:
2804: }
2805: ®ister_handler("userhassession", \&user_has_session_handler, 0,1,0);
2806:
2807: #
2808: # Authenticate access to a user file by checking that the token the user's
2809: # passed also exists in their session file
2810: #
2811: # Parameters:
2812: # cmd - The request keyword that dispatched to tus.
2813: # tail - The tail of the request (colon separated parameters).
2814: # client - Filehandle open on the client.
2815: # Return:
2816: # 1.
2817: sub token_auth_user_file_handler {
2818: my ($cmd, $tail, $client) = @_;
2819:
2820: my ($fname, $session) = split(/:/, $tail);
2821:
2822: chomp($session);
2823: my $reply="non_auth";
2824: my $file = $perlvar{'lonIDsDir'}.'/'.$session.'.id';
2825: if (open(ENVIN,"$file")) {
2826: flock(ENVIN,LOCK_SH);
2827: tie(my %disk_env,'GDBM_File',"$file",&GDBM_READER(),0640);
2828: if (exists($disk_env{"userfile.$fname"})) {
2829: $reply="ok";
2830: } else {
2831: foreach my $envname (keys(%disk_env)) {
2832: if ($envname=~ m|^userfile\.\Q$fname\E|) {
2833: $reply="ok";
2834: last;
2835: }
2836: }
2837: }
2838: untie(%disk_env);
2839: close(ENVIN);
2840: &Reply($client, \$reply, "$cmd:$tail");
2841: } else {
2842: &Failure($client, "invalid_token\n", "$cmd:$tail");
2843: }
2844: return 1;
2845:
2846: }
2847: ®ister_handler("tokenauthuserfile", \&token_auth_user_file_handler, 0,1,0);
2848:
2849: #
2850: # Unsubscribe from a resource.
2851: #
2852: # Parameters:
2853: # $cmd - The command that got us here.
2854: # $tail - Tail of the command (remaining parameters).
2855: # $client - File descriptor connected to client.
2856: # Returns
2857: # 0 - Requested to exit, caller should shut down.
2858: # 1 - Continue processing.
2859: #
2860: sub unsubscribe_handler {
2861: my ($cmd, $tail, $client) = @_;
2862:
2863: my $userinput= "$cmd:$tail";
2864:
2865: my ($fname) = split(/:/,$tail); # Split in case there's extrs.
2866:
2867: &Debug("Unsubscribing $fname");
2868: if (-e $fname) {
2869: &Debug("Exists");
2870: &Reply($client, &unsub($fname,$clientip), $userinput);
2871: } else {
2872: &Failure($client, "not_found\n", $userinput);
2873: }
2874: return 1;
2875: }
2876: ®ister_handler("unsub", \&unsubscribe_handler, 0, 1, 0);
2877:
2878: # Subscribe to a resource
2879: #
2880: # Parameters:
2881: # $cmd - The command that got us here.
2882: # $tail - Tail of the command (remaining parameters).
2883: # $client - File descriptor connected to client.
2884: # Returns
2885: # 0 - Requested to exit, caller should shut down.
2886: # 1 - Continue processing.
2887: #
2888: sub subscribe_handler {
2889: my ($cmd, $tail, $client)= @_;
2890:
2891: my $userinput = "$cmd:$tail";
2892:
2893: &Reply( $client, &subscribe($userinput,$clientip), $userinput);
2894:
2895: return 1;
2896: }
2897: ®ister_handler("sub", \&subscribe_handler, 0, 1, 0);
2898:
2899: #
2900: # Determine the latest version of a resource (it looks for the highest
2901: # past version and then returns that +1)
2902: #
2903: # Parameters:
2904: # $cmd - The command that got us here.
2905: # $tail - Tail of the command (remaining parameters).
2906: # (Should consist of an absolute path to a file)
2907: # $client - File descriptor connected to client.
2908: # Returns
2909: # 0 - Requested to exit, caller should shut down.
2910: # 1 - Continue processing.
2911: #
2912: sub current_version_handler {
2913: my ($cmd, $tail, $client) = @_;
2914:
2915: my $userinput= "$cmd:$tail";
2916:
2917: my $fname = $tail;
2918: &Reply( $client, ¤tversion($fname)."\n", $userinput);
2919: return 1;
2920:
2921: }
2922: ®ister_handler("currentversion", \¤t_version_handler, 0, 1, 0);
2923:
2924: # Make an entry in a user's activity log.
2925: #
2926: # Parameters:
2927: # $cmd - The command that got us here.
2928: # $tail - Tail of the command (remaining parameters).
2929: # $client - File descriptor connected to client.
2930: # Returns
2931: # 0 - Requested to exit, caller should shut down.
2932: # 1 - Continue processing.
2933: #
2934: sub activity_log_handler {
2935: my ($cmd, $tail, $client) = @_;
2936:
2937:
2938: my $userinput= "$cmd:$tail";
2939:
2940: my ($udom,$uname,$what)=split(/:/,$tail);
2941: chomp($what);
2942: my $proname=&propath($udom,$uname);
2943: my $now=time;
2944: my $hfh;
2945: if ($hfh=IO::File->new(">>$proname/activity.log")) {
2946: print $hfh "$now:$clientname:$what\n";
2947: &Reply( $client, "ok\n", $userinput);
2948: } else {
2949: &Failure($client, "error: ".($!+0)." IO::File->new Failed "
2950: ."while attempting log\n",
2951: $userinput);
2952: }
2953:
2954: return 1;
2955: }
2956: ®ister_handler("log", \&activity_log_handler, 0, 1, 0);
2957:
2958: #
2959: # Put a namespace entry in a user profile hash.
2960: # My druthers would be for this to be an encrypted interaction too.
2961: # anything that might be an inadvertent covert channel about either
2962: # user authentication or user personal information....
2963: #
2964: # Parameters:
2965: # $cmd - The command that got us here.
2966: # $tail - Tail of the command (remaining parameters).
2967: # $client - File descriptor connected to client.
2968: # Returns
2969: # 0 - Requested to exit, caller should shut down.
2970: # 1 - Continue processing.
2971: #
2972: sub put_user_profile_entry {
2973: my ($cmd, $tail, $client) = @_;
2974:
2975: my $userinput = "$cmd:$tail";
2976:
2977: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
2978: if ($namespace ne 'roles') {
2979: chomp($what);
2980: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2981: &GDBM_WRCREAT(),"P",$what);
2982: if($hashref) {
2983: my @pairs=split(/\&/,$what);
2984: foreach my $pair (@pairs) {
2985: my ($key,$value)=split(/=/,$pair);
2986: $hashref->{$key}=$value;
2987: }
2988: if (&untie_user_hash($hashref)) {
2989: &Reply( $client, "ok\n", $userinput);
2990: } else {
2991: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2992: "while attempting put\n",
2993: $userinput);
2994: }
2995: } else {
2996: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2997: "while attempting put\n", $userinput);
2998: }
2999: } else {
3000: &Failure( $client, "refused\n", $userinput);
3001: }
3002:
3003: return 1;
3004: }
3005: ®ister_handler("put", \&put_user_profile_entry, 0, 1, 0);
3006:
3007: # Put a piece of new data in hash, returns error if entry already exists
3008: # Parameters:
3009: # $cmd - The command that got us here.
3010: # $tail - Tail of the command (remaining parameters).
3011: # $client - File descriptor connected to client.
3012: # Returns
3013: # 0 - Requested to exit, caller should shut down.
3014: # 1 - Continue processing.
3015: #
3016: sub newput_user_profile_entry {
3017: my ($cmd, $tail, $client) = @_;
3018:
3019: my $userinput = "$cmd:$tail";
3020:
3021: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
3022: if ($namespace eq 'roles') {
3023: &Failure( $client, "refused\n", $userinput);
3024: return 1;
3025: }
3026:
3027: chomp($what);
3028:
3029: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3030: &GDBM_WRCREAT(),"N",$what);
3031: if(!$hashref) {
3032: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3033: "while attempting put\n", $userinput);
3034: return 1;
3035: }
3036:
3037: my @pairs=split(/\&/,$what);
3038: foreach my $pair (@pairs) {
3039: my ($key,$value)=split(/=/,$pair);
3040: if (exists($hashref->{$key})) {
3041: if (!&untie_user_hash($hashref)) {
3042: &logthis("error: ".($!+0)." untie (GDBM) failed ".
3043: "while attempting newput - early out as key exists");
3044: }
3045: &Failure($client, "key_exists: ".$key."\n",$userinput);
3046: return 1;
3047: }
3048: }
3049:
3050: foreach my $pair (@pairs) {
3051: my ($key,$value)=split(/=/,$pair);
3052: $hashref->{$key}=$value;
3053: }
3054:
3055: if (&untie_user_hash($hashref)) {
3056: &Reply( $client, "ok\n", $userinput);
3057: } else {
3058: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
3059: "while attempting put\n",
3060: $userinput);
3061: }
3062: return 1;
3063: }
3064: ®ister_handler("newput", \&newput_user_profile_entry, 0, 1, 0);
3065:
3066: #
3067: # Increment a profile entry in the user history file.
3068: # The history contains keyword value pairs. In this case,
3069: # The value itself is a pair of numbers. The first, the current value
3070: # the second an increment that this function applies to the current
3071: # value.
3072: #
3073: # Parameters:
3074: # $cmd - The command that got us here.
3075: # $tail - Tail of the command (remaining parameters).
3076: # $client - File descriptor connected to client.
3077: # Returns
3078: # 0 - Requested to exit, caller should shut down.
3079: # 1 - Continue processing.
3080: #
3081: sub increment_user_value_handler {
3082: my ($cmd, $tail, $client) = @_;
3083:
3084: my $userinput = "$cmd:$tail";
3085:
3086: my ($udom,$uname,$namespace,$what) =split(/:/,$tail);
3087: if ($namespace ne 'roles') {
3088: chomp($what);
3089: my $hashref = &tie_user_hash($udom, $uname,
3090: $namespace, &GDBM_WRCREAT(),
3091: "P",$what);
3092: if ($hashref) {
3093: my @pairs=split(/\&/,$what);
3094: foreach my $pair (@pairs) {
3095: my ($key,$value)=split(/=/,$pair);
3096: $value = &unescape($value);
3097: # We could check that we have a number...
3098: if (! defined($value) || $value eq '') {
3099: $value = 1;
3100: }
3101: $hashref->{$key}+=$value;
3102: if ($namespace eq 'nohist_resourcetracker') {
3103: if ($hashref->{$key} < 0) {
3104: $hashref->{$key} = 0;
3105: }
3106: }
3107: }
3108: if (&untie_user_hash($hashref)) {
3109: &Reply( $client, "ok\n", $userinput);
3110: } else {
3111: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
3112: "while attempting inc\n", $userinput);
3113: }
3114: } else {
3115: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3116: "while attempting inc\n", $userinput);
3117: }
3118: } else {
3119: &Failure($client, "refused\n", $userinput);
3120: }
3121:
3122: return 1;
3123: }
3124: ®ister_handler("inc", \&increment_user_value_handler, 0, 1, 0);
3125:
3126: #
3127: # Put a new role for a user. Roles are LonCAPA's packaging of permissions.
3128: # Each 'role' a user has implies a set of permissions. Adding a new role
3129: # for a person grants the permissions packaged with that role
3130: # to that user when the role is selected.
3131: #
3132: # Parameters:
3133: # $cmd - The command string (rolesput).
3134: # $tail - The remainder of the request line. For rolesput this
3135: # consists of a colon separated list that contains:
3136: # The domain and user that is granting the role (logged).
3137: # The domain and user that is getting the role.
3138: # The roles being granted as a set of & separated pairs.
3139: # each pair a key value pair.
3140: # $client - File descriptor connected to the client.
3141: # Returns:
3142: # 0 - If the daemon should exit
3143: # 1 - To continue processing.
3144: #
3145: #
3146: sub roles_put_handler {
3147: my ($cmd, $tail, $client) = @_;
3148:
3149: my $userinput = "$cmd:$tail";
3150:
3151: my ( $exedom, $exeuser, $udom, $uname, $what) = split(/:/,$tail);
3152:
3153:
3154: my $namespace='roles';
3155: chomp($what);
3156: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3157: &GDBM_WRCREAT(), "P",
3158: "$exedom:$exeuser:$what");
3159: #
3160: # Log the attempt to set a role. The {}'s here ensure that the file
3161: # handle is open for the minimal amount of time. Since the flush
3162: # is done on close this improves the chances the log will be an un-
3163: # corrupted ordered thing.
3164: if ($hashref) {
3165: my $pass_entry = &get_auth_type($udom, $uname);
3166: my ($auth_type,$pwd) = split(/:/, $pass_entry);
3167: $auth_type = $auth_type.":";
3168: my @pairs=split(/\&/,$what);
3169: foreach my $pair (@pairs) {
3170: my ($key,$value)=split(/=/,$pair);
3171: &manage_permissions($key, $udom, $uname,
3172: $auth_type);
3173: $hashref->{$key}=$value;
3174: }
3175: if (&untie_user_hash($hashref)) {
3176: &Reply($client, "ok\n", $userinput);
3177: } else {
3178: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3179: "while attempting rolesput\n", $userinput);
3180: }
3181: } else {
3182: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3183: "while attempting rolesput\n", $userinput);
3184: }
3185: return 1;
3186: }
3187: ®ister_handler("rolesput", \&roles_put_handler, 1,1,0); # Encoded client only.
3188:
3189: #
3190: # Deletes (removes) a role for a user. This is equivalent to removing
3191: # a permissions package associated with the role from the user's profile.
3192: #
3193: # Parameters:
3194: # $cmd - The command (rolesdel)
3195: # $tail - The remainder of the request line. This consists
3196: # of:
3197: # The domain and user requesting the change (logged)
3198: # The domain and user being changed.
3199: # The roles being revoked. These are shipped to us
3200: # as a bunch of & separated role name keywords.
3201: # $client - The file handle open on the client.
3202: # Returns:
3203: # 1 - Continue processing
3204: # 0 - Exit.
3205: #
3206: sub roles_delete_handler {
3207: my ($cmd, $tail, $client) = @_;
3208:
3209: my $userinput = "$cmd:$tail";
3210:
3211: my ($exedom,$exeuser,$udom,$uname,$what)=split(/:/,$tail);
3212: &Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom.
3213: "what = ".$what);
3214: my $namespace='roles';
3215: chomp($what);
3216: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3217: &GDBM_WRCREAT(), "D",
3218: "$exedom:$exeuser:$what");
3219:
3220: if ($hashref) {
3221: my @rolekeys=split(/\&/,$what);
3222:
3223: foreach my $key (@rolekeys) {
3224: delete $hashref->{$key};
3225: }
3226: if (&untie_user_hash($hashref)) {
3227: &Reply($client, "ok\n", $userinput);
3228: } else {
3229: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3230: "while attempting rolesdel\n", $userinput);
3231: }
3232: } else {
3233: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3234: "while attempting rolesdel\n", $userinput);
3235: }
3236:
3237: return 1;
3238: }
3239: ®ister_handler("rolesdel", \&roles_delete_handler, 1,1, 0); # Encoded client only
3240:
3241: # Unencrypted get from a user's profile database. See
3242: # GetProfileEntryEncrypted for a version that does end-to-end encryption.
3243: # This function retrieves a keyed item from a specific named database in the
3244: # user's directory.
3245: #
3246: # Parameters:
3247: # $cmd - Command request keyword (get).
3248: # $tail - Tail of the command. This is a colon separated list
3249: # consisting of the domain and username that uniquely
3250: # identifies the profile,
3251: # The 'namespace' which selects the gdbm file to
3252: # do the lookup in,
3253: # & separated list of keys to lookup. Note that
3254: # the values are returned as an & separated list too.
3255: # $client - File descriptor open on the client.
3256: # Returns:
3257: # 1 - Continue processing.
3258: # 0 - Exit.
3259: #
3260: sub get_profile_entry {
3261: my ($cmd, $tail, $client) = @_;
3262:
3263: my $userinput= "$cmd:$tail";
3264:
3265: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
3266: chomp($what);
3267:
3268:
3269: my $replystring = read_profile($udom, $uname, $namespace, $what);
3270: my ($first) = split(/:/,$replystring);
3271: if($first ne "error") {
3272: &Reply($client, \$replystring, $userinput);
3273: } else {
3274: &Failure($client, $replystring." while attempting get\n", $userinput);
3275: }
3276: return 1;
3277:
3278:
3279: }
3280: ®ister_handler("get", \&get_profile_entry, 0,1,0);
3281:
3282: #
3283: # Process the encrypted get request. Note that the request is sent
3284: # in clear, but the reply is encrypted. This is a small covert channel:
3285: # information about the sensitive keys is given to the snooper. Just not
3286: # information about the values of the sensitive key. Hmm if I wanted to
3287: # know these I'd snoop for the egets. Get the profile item names from them
3288: # and then issue a get for them since there's no enforcement of the
3289: # requirement of an encrypted get for particular profile items. If I
3290: # were re-doing this, I'd force the request to be encrypted as well as the
3291: # reply. I'd also just enforce encrypted transactions for all gets since
3292: # that would prevent any covert channel snooping.
3293: #
3294: # Parameters:
3295: # $cmd - Command keyword of request (eget).
3296: # $tail - Tail of the command. See GetProfileEntry
3297: # for more information about this.
3298: # $client - File open on the client.
3299: # Returns:
3300: # 1 - Continue processing
3301: # 0 - server should exit.
3302: sub get_profile_entry_encrypted {
3303: my ($cmd, $tail, $client) = @_;
3304:
3305: my $userinput = "$cmd:$tail";
3306:
3307: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
3308: chomp($what);
3309: my $qresult = read_profile($udom, $uname, $namespace, $what);
3310: my ($first) = split(/:/, $qresult);
3311: if($first ne "error") {
3312:
3313: if ($cipher) {
3314: my $cmdlength=length($qresult);
3315: $qresult.=" ";
3316: my $encqresult='';
3317: for(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
3318: $encqresult.= unpack("H16",
3319: $cipher->encrypt(substr($qresult,
3320: $encidx,
3321: 8)));
3322: }
3323: &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput);
3324: } else {
3325: &Failure( $client, "error:no_key\n", $userinput);
3326: }
3327: } else {
3328: &Failure($client, "$qresult while attempting eget\n", $userinput);
3329:
3330: }
3331:
3332: return 1;
3333: }
3334: ®ister_handler("eget", \&get_profile_entry_encrypted, 0, 1, 0);
3335:
3336: #
3337: # Deletes a key in a user profile database.
3338: #
3339: # Parameters:
3340: # $cmd - Command keyword (del).
3341: # $tail - Command tail. IN this case a colon
3342: # separated list containing:
3343: # The domain and user that identifies uniquely
3344: # the identity of the user.
3345: # The profile namespace (name of the profile
3346: # database file).
3347: # & separated list of keywords to delete.
3348: # $client - File open on client socket.
3349: # Returns:
3350: # 1 - Continue processing
3351: # 0 - Exit server.
3352: #
3353: #
3354: sub delete_profile_entry {
3355: my ($cmd, $tail, $client) = @_;
3356:
3357: my $userinput = "cmd:$tail";
3358:
3359: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
3360: chomp($what);
3361: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3362: &GDBM_WRCREAT(),
3363: "D",$what);
3364: if ($hashref) {
3365: my @keys=split(/\&/,$what);
3366: foreach my $key (@keys) {
3367: delete($hashref->{$key});
3368: }
3369: if (&untie_user_hash($hashref)) {
3370: &Reply($client, "ok\n", $userinput);
3371: } else {
3372: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3373: "while attempting del\n", $userinput);
3374: }
3375: } else {
3376: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3377: "while attempting del\n", $userinput);
3378: }
3379: return 1;
3380: }
3381: ®ister_handler("del", \&delete_profile_entry, 0, 1, 0);
3382:
3383: #
3384: # List the set of keys that are defined in a profile database file.
3385: # A successful reply from this will contain an & separated list of
3386: # the keys.
3387: # Parameters:
3388: # $cmd - Command request (keys).
3389: # $tail - Remainder of the request, a colon separated
3390: # list containing domain/user that identifies the
3391: # user being queried, and the database namespace
3392: # (database filename essentially).
3393: # $client - File open on the client.
3394: # Returns:
3395: # 1 - Continue processing.
3396: # 0 - Exit the server.
3397: #
3398: sub get_profile_keys {
3399: my ($cmd, $tail, $client) = @_;
3400:
3401: my $userinput = "$cmd:$tail";
3402:
3403: my ($udom,$uname,$namespace)=split(/:/,$tail);
3404: my $qresult='';
3405: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3406: &GDBM_READER());
3407: if ($hashref) {
3408: foreach my $key (keys %$hashref) {
3409: $qresult.="$key&";
3410: }
3411: if (&untie_user_hash($hashref)) {
3412: $qresult=~s/\&$//;
3413: &Reply($client, \$qresult, $userinput);
3414: } else {
3415: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3416: "while attempting keys\n", $userinput);
3417: }
3418: } else {
3419: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3420: "while attempting keys\n", $userinput);
3421: }
3422:
3423: return 1;
3424: }
3425: ®ister_handler("keys", \&get_profile_keys, 0, 1, 0);
3426:
3427: #
3428: # Dump the contents of a user profile database.
3429: # Note that this constitutes a very large covert channel too since
3430: # the dump will return sensitive information that is not encrypted.
3431: # The naive security assumption is that the session negotiation ensures
3432: # our client is trusted and I don't believe that's assured at present.
3433: # Sure want badly to go to ssl or tls. Of course if my peer isn't really
3434: # a LonCAPA node they could have negotiated an encryption key too so >sigh<.
3435: #
3436: # Parameters:
3437: # $cmd - The command request keyword (currentdump).
3438: # $tail - Remainder of the request, consisting of a colon
3439: # separated list that has the domain/username and
3440: # the namespace to dump (database file).
3441: # $client - file open on the remote client.
3442: # Returns:
3443: # 1 - Continue processing.
3444: # 0 - Exit the server.
3445: #
3446: sub dump_profile_database {
3447: my ($cmd, $tail, $client) = @_;
3448:
3449: my $userinput = "$cmd:$tail";
3450:
3451: my ($udom,$uname,$namespace) = split(/:/,$tail);
3452: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3453: &GDBM_READER());
3454: if ($hashref) {
3455: # Structure of %data:
3456: # $data{$symb}->{$parameter}=$value;
3457: # $data{$symb}->{'v.'.$parameter}=$version;
3458: # since $parameter will be unescaped, we do not
3459: # have to worry about silly parameter names...
3460:
3461: my $qresult='';
3462: my %data = (); # A hash of anonymous hashes..
3463: while (my ($key,$value) = each(%$hashref)) {
3464: my ($v,$symb,$param) = split(/:/,$key);
3465: next if ($v eq 'version' || $symb eq 'keys');
3466: next if (exists($data{$symb}) &&
3467: exists($data{$symb}->{$param}) &&
3468: $data{$symb}->{'v.'.$param} > $v);
3469: $data{$symb}->{$param}=$value;
3470: $data{$symb}->{'v.'.$param}=$v;
3471: }
3472: if (&untie_user_hash($hashref)) {
3473: while (my ($symb,$param_hash) = each(%data)) {
3474: while(my ($param,$value) = each (%$param_hash)){
3475: next if ($param =~ /^v\./); # Ignore versions...
3476: #
3477: # Just dump the symb=value pairs separated by &
3478: #
3479: $qresult.=$symb.':'.$param.'='.$value.'&';
3480: }
3481: }
3482: chop($qresult);
3483: &Reply($client , \$qresult, $userinput);
3484: } else {
3485: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3486: "while attempting currentdump\n", $userinput);
3487: }
3488: } else {
3489: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3490: "while attempting currentdump\n", $userinput);
3491: }
3492:
3493: return 1;
3494: }
3495: ®ister_handler("currentdump", \&dump_profile_database, 0, 1, 0);
3496:
3497: #
3498: # Dump a profile database with an optional regular expression
3499: # to match against the keys. In this dump, no effort is made
3500: # to separate symb from version information. Presumably the
3501: # databases that are dumped by this command are of a different
3502: # structure. Need to look at this and improve the documentation of
3503: # both this and the currentdump handler.
3504: # Parameters:
3505: # $cmd - The command keyword.
3506: # $tail - All of the characters after the $cmd:
3507: # These are expected to be a colon
3508: # separated list containing:
3509: # domain/user - identifying the user.
3510: # namespace - identifying the database.
3511: # regexp - optional regular expression
3512: # that is matched against
3513: # database keywords to do
3514: # selective dumps.
3515: # range - optional range of entries
3516: # e.g., 10-20 would return the
3517: # 10th to 19th items, etc.
3518: # $client - Channel open on the client.
3519: # Returns:
3520: # 1 - Continue processing.
3521: # Side effects:
3522: # response is written to $client.
3523: #
3524: sub dump_with_regexp {
3525: my ($cmd, $tail, $client) = @_;
3526:
3527: my $res = LONCAPA::Lond::dump_with_regexp($tail, $clientversion);
3528:
3529: if ($res =~ /^error:/) {
3530: &Failure($client, \$res, "$cmd:$tail");
3531: } else {
3532: &Reply($client, \$res, "$cmd:$tail");
3533: }
3534:
3535: return 1;
3536: }
3537: ®ister_handler("dump", \&dump_with_regexp, 0, 1, 0);
3538:
3539: # Store a set of key=value pairs associated with a versioned name.
3540: #
3541: # Parameters:
3542: # $cmd - Request command keyword.
3543: # $tail - Tail of the request. This is a colon
3544: # separated list containing:
3545: # domain/user - User and authentication domain.
3546: # namespace - Name of the database being modified
3547: # rid - Resource keyword to modify.
3548: # what - new value associated with rid.
3549: # laststore - (optional) version=timestamp
3550: # for most recent transaction for rid
3551: # in namespace, when cstore was called
3552: #
3553: # $client - Socket open on the client.
3554: #
3555: #
3556: # Returns:
3557: # 1 (keep on processing).
3558: # Side-Effects:
3559: # Writes to the client
3560: # Successful storage will cause either 'ok', or, if $laststore was included
3561: # in the tail of the request, and the version number for the last transaction
3562: # is larger than the version in $laststore, delay:$numtrans , where $numtrans
3563: # is the number of store evevnts recorded for rid in namespace since
3564: # lonnet::store() was called by the client.
3565: #
3566: sub store_handler {
3567: my ($cmd, $tail, $client) = @_;
3568:
3569: my $userinput = "$cmd:$tail";
3570:
3571: chomp($tail);
3572: my ($udom,$uname,$namespace,$rid,$what,$laststore) =split(/:/,$tail);
3573: if ($namespace ne 'roles') {
3574:
3575: my @pairs=split(/\&/,$what);
3576: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3577: &GDBM_WRCREAT(), "S",
3578: "$rid:$what");
3579: if ($hashref) {
3580: my $now = time;
3581: my $numtrans;
3582: if ($laststore) {
3583: my ($previousversion,$previoustime) = split(/\=/,$laststore);
3584: my ($lastversion,$lasttime) = (0,0);
3585: $lastversion = $hashref->{"version:$rid"};
3586: if ($lastversion) {
3587: $lasttime = $hashref->{"$lastversion:$rid:timestamp"};
3588: }
3589: if (($previousversion) && ($previousversion !~ /\D/)) {
3590: if (($lastversion > $previousversion) && ($lasttime >= $previoustime)) {
3591: $numtrans = $lastversion - $previousversion;
3592: }
3593: } elsif ($lastversion) {
3594: $numtrans = $lastversion;
3595: }
3596: if ($numtrans) {
3597: $numtrans =~ s/D//g;
3598: }
3599: }
3600:
3601: $hashref->{"version:$rid"}++;
3602: my $version=$hashref->{"version:$rid"};
3603: my $allkeys='';
3604: foreach my $pair (@pairs) {
3605: my ($key,$value)=split(/=/,$pair);
3606: $allkeys.=$key.':';
3607: $hashref->{"$version:$rid:$key"}=$value;
3608: }
3609: $hashref->{"$version:$rid:timestamp"}=$now;
3610: $allkeys.='timestamp';
3611: $hashref->{"$version:keys:$rid"}=$allkeys;
3612: if (&untie_user_hash($hashref)) {
3613: my $msg = 'ok';
3614: if ($numtrans) {
3615: $msg = 'delay:'.$numtrans;
3616: }
3617: &Reply($client, "$msg\n", $userinput);
3618: } else {
3619: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3620: "while attempting store\n", $userinput);
3621: }
3622: } else {
3623: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3624: "while attempting store\n", $userinput);
3625: }
3626: } else {
3627: &Failure($client, "refused\n", $userinput);
3628: }
3629:
3630: return 1;
3631: }
3632: ®ister_handler("store", \&store_handler, 0, 1, 0);
3633:
3634: # Modify a set of key=value pairs associated with a versioned name.
3635: #
3636: # Parameters:
3637: # $cmd - Request command keyword.
3638: # $tail - Tail of the request. This is a colon
3639: # separated list containing:
3640: # domain/user - User and authentication domain.
3641: # namespace - Name of the database being modified
3642: # rid - Resource keyword to modify.
3643: # v - Version item to modify
3644: # what - new value associated with rid.
3645: #
3646: # $client - Socket open on the client.
3647: #
3648: #
3649: # Returns:
3650: # 1 (keep on processing).
3651: # Side-Effects:
3652: # Writes to the client
3653: sub putstore_handler {
3654: my ($cmd, $tail, $client) = @_;
3655:
3656: my $userinput = "$cmd:$tail";
3657:
3658: my ($udom,$uname,$namespace,$rid,$v,$what) =split(/:/,$tail);
3659: if ($namespace ne 'roles') {
3660:
3661: chomp($what);
3662: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3663: &GDBM_WRCREAT(), "M",
3664: "$rid:$v:$what");
3665: if ($hashref) {
3666: my $now = time;
3667: my %data = &hash_extract($what);
3668: my @allkeys;
3669: while (my($key,$value) = each(%data)) {
3670: push(@allkeys,$key);
3671: $hashref->{"$v:$rid:$key"} = $value;
3672: }
3673: my $allkeys = join(':',@allkeys);
3674: $hashref->{"$v:keys:$rid"}=$allkeys;
3675:
3676: if (&untie_user_hash($hashref)) {
3677: &Reply($client, "ok\n", $userinput);
3678: } else {
3679: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3680: "while attempting store\n", $userinput);
3681: }
3682: } else {
3683: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3684: "while attempting store\n", $userinput);
3685: }
3686: } else {
3687: &Failure($client, "refused\n", $userinput);
3688: }
3689:
3690: return 1;
3691: }
3692: ®ister_handler("putstore", \&putstore_handler, 0, 1, 0);
3693:
3694: sub hash_extract {
3695: my ($str)=@_;
3696: my %hash;
3697: foreach my $pair (split(/\&/,$str)) {
3698: my ($key,$value)=split(/=/,$pair);
3699: $hash{$key}=$value;
3700: }
3701: return (%hash);
3702: }
3703: sub hash_to_str {
3704: my ($hash_ref)=@_;
3705: my $str;
3706: foreach my $key (keys(%$hash_ref)) {
3707: $str.=$key.'='.$hash_ref->{$key}.'&';
3708: }
3709: $str=~s/\&$//;
3710: return $str;
3711: }
3712:
3713: #
3714: # Dump out all versions of a resource that has key=value pairs associated
3715: # with it for each version. These resources are built up via the store
3716: # command.
3717: #
3718: # Parameters:
3719: # $cmd - Command keyword.
3720: # $tail - Remainder of the request which consists of:
3721: # domain/user - User and auth. domain.
3722: # namespace - name of resource database.
3723: # rid - Resource id.
3724: # $client - socket open on the client.
3725: #
3726: # Returns:
3727: # 1 indicating the caller should not yet exit.
3728: # Side-effects:
3729: # Writes a reply to the client.
3730: # The reply is a string of the following shape:
3731: # version=current&version:keys=k1:k2...&1:k1=v1&1:k2=v2...
3732: # Where the 1 above represents version 1.
3733: # this continues for all pairs of keys in all versions.
3734: #
3735: #
3736: #
3737: #
3738: sub restore_handler {
3739: my ($cmd, $tail, $client) = @_;
3740:
3741: my $userinput = "$cmd:$tail"; # Only used for logging purposes.
3742: my ($udom,$uname,$namespace,$rid) = split(/:/,$tail);
3743: $namespace=~s/\//\_/g;
3744: $namespace = &LONCAPA::clean_username($namespace);
3745:
3746: chomp($rid);
3747: my $qresult='';
3748: my $hashref = &tie_user_hash($udom, $uname, $namespace, &GDBM_READER());
3749: if ($hashref) {
3750: my $version=$hashref->{"version:$rid"};
3751: $qresult.="version=$version&";
3752: my $scope;
3753: for ($scope=1;$scope<=$version;$scope++) {
3754: my $vkeys=$hashref->{"$scope:keys:$rid"};
3755: my @keys=split(/:/,$vkeys);
3756: my $key;
3757: $qresult.="$scope:keys=$vkeys&";
3758: foreach $key (@keys) {
3759: $qresult.="$scope:$key=".$hashref->{"$scope:$rid:$key"}."&";
3760: }
3761: }
3762: if (&untie_user_hash($hashref)) {
3763: $qresult=~s/\&$//;
3764: &Reply( $client, \$qresult, $userinput);
3765: } else {
3766: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3767: "while attempting restore\n", $userinput);
3768: }
3769: } else {
3770: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3771: "while attempting restore\n", $userinput);
3772: }
3773:
3774: return 1;
3775:
3776:
3777: }
3778: ®ister_handler("restore", \&restore_handler, 0,1,0);
3779:
3780: #
3781: # Add a chat message to a synchronous discussion board.
3782: #
3783: # Parameters:
3784: # $cmd - Request keyword.
3785: # $tail - Tail of the command. A colon separated list
3786: # containing:
3787: # cdom - Domain on which the chat board lives
3788: # cnum - Course containing the chat board.
3789: # newpost - Body of the posting.
3790: # group - Optional group, if chat board is only
3791: # accessible in a group within the course
3792: # $client - Socket open on the client.
3793: # Returns:
3794: # 1 - Indicating caller should keep on processing.
3795: #
3796: # Side-effects:
3797: # writes a reply to the client.
3798: #
3799: #
3800: sub send_chat_handler {
3801: my ($cmd, $tail, $client) = @_;
3802:
3803:
3804: my $userinput = "$cmd:$tail";
3805:
3806: my ($cdom,$cnum,$newpost,$group)=split(/\:/,$tail);
3807: &chat_add($cdom,$cnum,$newpost,$group);
3808: &Reply($client, "ok\n", $userinput);
3809:
3810: return 1;
3811: }
3812: ®ister_handler("chatsend", \&send_chat_handler, 0, 1, 0);
3813:
3814: #
3815: # Retrieve the set of chat messages from a discussion board.
3816: #
3817: # Parameters:
3818: # $cmd - Command keyword that initiated the request.
3819: # $tail - Remainder of the request after the command
3820: # keyword. In this case a colon separated list of
3821: # chat domain - Which discussion board.
3822: # chat id - Discussion thread(?)
3823: # domain/user - Authentication domain and username
3824: # of the requesting person.
3825: # group - Optional course group containing
3826: # the board.
3827: # $client - Socket open on the client program.
3828: # Returns:
3829: # 1 - continue processing
3830: # Side effects:
3831: # Response is written to the client.
3832: #
3833: sub retrieve_chat_handler {
3834: my ($cmd, $tail, $client) = @_;
3835:
3836:
3837: my $userinput = "$cmd:$tail";
3838:
3839: my ($cdom,$cnum,$udom,$uname,$group)=split(/\:/,$tail);
3840: my $reply='';
3841: foreach (&get_chat($cdom,$cnum,$udom,$uname,$group)) {
3842: $reply.=&escape($_).':';
3843: }
3844: $reply=~s/\:$//;
3845: &Reply($client, \$reply, $userinput);
3846:
3847:
3848: return 1;
3849: }
3850: ®ister_handler("chatretr", \&retrieve_chat_handler, 0, 1, 0);
3851:
3852: #
3853: # Initiate a query of an sql database. SQL query repsonses get put in
3854: # a file for later retrieval. This prevents sql query results from
3855: # bottlenecking the system. Note that with loncnew, perhaps this is
3856: # less of an issue since multiple outstanding requests can be concurrently
3857: # serviced.
3858: #
3859: # Parameters:
3860: # $cmd - COmmand keyword that initiated the request.
3861: # $tail - Remainder of the command after the keyword.
3862: # For this function, this consists of a query and
3863: # 3 arguments that are self-documentingly labelled
3864: # in the original arg1, arg2, arg3.
3865: # $client - Socket open on the client.
3866: # Return:
3867: # 1 - Indicating processing should continue.
3868: # Side-effects:
3869: # a reply is written to $client.
3870: #
3871: sub send_query_handler {
3872: my ($cmd, $tail, $client) = @_;
3873:
3874:
3875: my $userinput = "$cmd:$tail";
3876:
3877: my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail);
3878: $query=~s/\n*$//g;
3879: if (($query eq 'usersearch') || ($query eq 'instdirsearch')) {
3880: my $usersearchconf = &get_usersearch_config($currentdomainid,'directorysrch');
3881: my $earlyout;
3882: if (ref($usersearchconf) eq 'HASH') {
3883: if ($currentdomainid eq $clienthomedom) {
3884: if ($query eq 'usersearch') {
3885: if ($usersearchconf->{'lcavailable'} eq '0') {
3886: $earlyout = 1;
3887: }
3888: } else {
3889: if ($usersearchconf->{'available'} eq '0') {
3890: $earlyout = 1;
3891: }
3892: }
3893: } else {
3894: if ($query eq 'usersearch') {
3895: if ($usersearchconf->{'lclocalonly'}) {
3896: $earlyout = 1;
3897: }
3898: } else {
3899: if ($usersearchconf->{'localonly'}) {
3900: $earlyout = 1;
3901: }
3902: }
3903: }
3904: }
3905: if ($earlyout) {
3906: &Reply($client, "query_not_authorized\n");
3907: return 1;
3908: }
3909: }
3910: &Reply($client, "". &sql_reply("$clientname\&$query".
3911: "\&$arg1"."\&$arg2"."\&$arg3")."\n",
3912: $userinput);
3913:
3914: return 1;
3915: }
3916: ®ister_handler("querysend", \&send_query_handler, 0, 1, 0);
3917:
3918: #
3919: # Add a reply to an sql query. SQL queries are done asyncrhonously.
3920: # The query is submitted via a "querysend" transaction.
3921: # There it is passed on to the lonsql daemon, queued and issued to
3922: # mysql.
3923: # This transaction is invoked when the sql transaction is complete
3924: # it stores the query results in flie and indicates query completion.
3925: # presumably local software then fetches this response... I'm guessing
3926: # the sequence is: lonc does a querysend, we ask lonsql to do it.
3927: # lonsql on completion of the query interacts with the lond of our
3928: # client to do a query reply storing two files:
3929: # - id - The results of the query.
3930: # - id.end - Indicating the transaction completed.
3931: # NOTE: id is a unique id assigned to the query and querysend time.
3932: # Parameters:
3933: # $cmd - Command keyword that initiated this request.
3934: # $tail - Remainder of the tail. In this case that's a colon
3935: # separated list containing the query Id and the
3936: # results of the query.
3937: # $client - Socket open on the client.
3938: # Return:
3939: # 1 - Indicating that we should continue processing.
3940: # Side effects:
3941: # ok written to the client.
3942: #
3943: sub reply_query_handler {
3944: my ($cmd, $tail, $client) = @_;
3945:
3946:
3947: my $userinput = "$cmd:$tail";
3948:
3949: my ($id,$reply)=split(/:/,$tail);
3950: my $store;
3951: my $execdir=$perlvar{'lonDaemons'};
3952: if ($store=IO::File->new(">$execdir/tmp/$id")) {
3953: $reply=~s/\&/\n/g;
3954: print $store $reply;
3955: close $store;
3956: my $store2=IO::File->new(">$execdir/tmp/$id.end");
3957: print $store2 "done\n";
3958: close $store2;
3959: &Reply($client, "ok\n", $userinput);
3960: } else {
3961: &Failure($client, "error: ".($!+0)
3962: ." IO::File->new Failed ".
3963: "while attempting queryreply\n", $userinput);
3964: }
3965:
3966:
3967: return 1;
3968: }
3969: ®ister_handler("queryreply", \&reply_query_handler, 0, 1, 0);
3970:
3971: #
3972: # Process the courseidput request. Not quite sure what this means
3973: # at the system level sense. It appears a gdbm file in the
3974: # /home/httpd/lonUsers/$domain/nohist_courseids is tied and
3975: # a set of entries made in that database.
3976: #
3977: # Parameters:
3978: # $cmd - The command keyword that initiated this request.
3979: # $tail - Tail of the command. In this case consists of a colon
3980: # separated list contaning the domain to apply this to and
3981: # an ampersand separated list of keyword=value pairs.
3982: # Each value is a colon separated list that includes:
3983: # description, institutional code and course owner.
3984: # For backward compatibility with versions included
3985: # in LON-CAPA 1.1.X (and earlier) and 1.2.X, institutional
3986: # code and/or course owner are preserved from the existing
3987: # record when writing a new record in response to 1.1 or
3988: # 1.2 implementations of lonnet::flushcourselogs().
3989: #
3990: # $client - Socket open on the client.
3991: # Returns:
3992: # 1 - indicating that processing should continue
3993: #
3994: # Side effects:
3995: # reply is written to the client.
3996: #
3997: sub put_course_id_handler {
3998: my ($cmd, $tail, $client) = @_;
3999:
4000:
4001: my $userinput = "$cmd:$tail";
4002:
4003: my ($udom, $what) = split(/:/, $tail,2);
4004: chomp($what);
4005: my $now=time;
4006: my @pairs=split(/\&/,$what);
4007:
4008: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
4009: if ($hashref) {
4010: foreach my $pair (@pairs) {
4011: my ($key,$courseinfo) = split(/=/,$pair,2);
4012: $courseinfo =~ s/=/:/g;
4013: if (defined($hashref->{$key})) {
4014: my $value = &Apache::lonnet::thaw_unescape($hashref->{$key});
4015: if (ref($value) eq 'HASH') {
4016: my @items = ('description','inst_code','owner','type');
4017: my @new_items = split(/:/,$courseinfo,-1);
4018: my %storehash;
4019: for (my $i=0; $i<@new_items; $i++) {
4020: $storehash{$items[$i]} = &unescape($new_items[$i]);
4021: }
4022: $hashref->{$key} =
4023: &Apache::lonnet::freeze_escape(\%storehash);
4024: my $unesc_key = &unescape($key);
4025: $hashref->{&escape('lasttime:'.$unesc_key)} = $now;
4026: next;
4027: }
4028: }
4029: my @current_items = split(/:/,$hashref->{$key},-1);
4030: shift(@current_items); # remove description
4031: pop(@current_items); # remove last access
4032: my $numcurrent = scalar(@current_items);
4033: if ($numcurrent > 3) {
4034: $numcurrent = 3;
4035: }
4036: my @new_items = split(/:/,$courseinfo,-1);
4037: my $numnew = scalar(@new_items);
4038: if ($numcurrent > 0) {
4039: if ($numnew <= $numcurrent) { # flushcourselogs() from pre 2.2
4040: for (my $j=$numcurrent-$numnew; $j>=0; $j--) {
4041: $courseinfo .= ':'.$current_items[$numcurrent-$j-1];
4042: }
4043: }
4044: }
4045: $hashref->{$key}=$courseinfo.':'.$now;
4046: }
4047: if (&untie_domain_hash($hashref)) {
4048: &Reply( $client, "ok\n", $userinput);
4049: } else {
4050: &Failure($client, "error: ".($!+0)
4051: ." untie(GDBM) Failed ".
4052: "while attempting courseidput\n", $userinput);
4053: }
4054: } else {
4055: &Failure($client, "error: ".($!+0)
4056: ." tie(GDBM) Failed ".
4057: "while attempting courseidput\n", $userinput);
4058: }
4059:
4060: return 1;
4061: }
4062: ®ister_handler("courseidput", \&put_course_id_handler, 0, 1, 0);
4063:
4064: sub put_course_id_hash_handler {
4065: my ($cmd, $tail, $client) = @_;
4066: my $userinput = "$cmd:$tail";
4067: my ($udom,$mode,$what) = split(/:/, $tail,3);
4068: chomp($what);
4069: my $now=time;
4070: my @pairs=split(/\&/,$what);
4071: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
4072: if ($hashref) {
4073: foreach my $pair (@pairs) {
4074: my ($key,$value)=split(/=/,$pair);
4075: my $unesc_key = &unescape($key);
4076: if ($mode ne 'timeonly') {
4077: if (!defined($hashref->{&escape('lasttime:'.$unesc_key)})) {
4078: my $curritems = &Apache::lonnet::thaw_unescape($key);
4079: if (ref($curritems) ne 'HASH') {
4080: my @current_items = split(/:/,$hashref->{$key},-1);
4081: my $lasttime = pop(@current_items);
4082: $hashref->{&escape('lasttime:'.$unesc_key)} = $lasttime;
4083: } else {
4084: $hashref->{&escape('lasttime:'.$unesc_key)} = '';
4085: }
4086: }
4087: $hashref->{$key} = $value;
4088: }
4089: if ($mode ne 'notime') {
4090: $hashref->{&escape('lasttime:'.$unesc_key)} = $now;
4091: }
4092: }
4093: if (&untie_domain_hash($hashref)) {
4094: &Reply($client, "ok\n", $userinput);
4095: } else {
4096: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4097: "while attempting courseidputhash\n", $userinput);
4098: }
4099: } else {
4100: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4101: "while attempting courseidputhash\n", $userinput);
4102: }
4103: return 1;
4104: }
4105: ®ister_handler("courseidputhash", \&put_course_id_hash_handler, 0, 1, 0);
4106:
4107: # Retrieves the value of a course id resource keyword pattern
4108: # defined since a starting date. Both the starting date and the
4109: # keyword pattern are optional. If the starting date is not supplied it
4110: # is treated as the beginning of time. If the pattern is not found,
4111: # it is treatred as "." matching everything.
4112: #
4113: # Parameters:
4114: # $cmd - Command keyword that resulted in us being dispatched.
4115: # $tail - The remainder of the command that, in this case, consists
4116: # of a colon separated list of:
4117: # domain - The domain in which the course database is
4118: # defined.
4119: # since - Optional parameter describing the minimum
4120: # time of definition(?) of the resources that
4121: # will match the dump.
4122: # description - regular expression that is used to filter
4123: # the dump. Only keywords matching this regexp
4124: # will be used.
4125: # institutional code - optional supplied code to filter
4126: # the dump. Only courses with an institutional code
4127: # that match the supplied code will be returned.
4128: # owner - optional supplied username and domain of owner to
4129: # filter the dump. Only courses for which the course
4130: # owner matches the supplied username and/or domain
4131: # will be returned. Pre-2.2.0 legacy entries from
4132: # nohist_courseiddump will only contain usernames.
4133: # type - optional parameter for selection
4134: # regexp_ok - if 1 or -1 allow the supplied institutional code
4135: # filter to behave as a regular expression:
4136: # 1 will not exclude the course if the instcode matches the RE
4137: # -1 will exclude the course if the instcode matches the RE
4138: # rtn_as_hash - whether to return the information available for
4139: # each matched item as a frozen hash of all
4140: # key, value pairs in the item's hash, or as a
4141: # colon-separated list of (in order) description,
4142: # institutional code, and course owner.
4143: # selfenrollonly - filter by courses allowing self-enrollment
4144: # now or in the future (selfenrollonly = 1).
4145: # catfilter - filter by course category, assigned to a course
4146: # using manually defined categories (i.e., not
4147: # self-cataloging based on on institutional code).
4148: # showhidden - include course in results even if course
4149: # was set to be excluded from course catalog (DC only).
4150: # caller - if set to 'coursecatalog', courses set to be hidden
4151: # from course catalog will be excluded from results (unless
4152: # overridden by "showhidden".
4153: # cloner - escaped username:domain of course cloner (if picking course to
4154: # clone).
4155: # cc_clone_list - escaped comma separated list of courses for which
4156: # course cloner has active CC role (and so can clone
4157: # automatically).
4158: # cloneonly - filter by courses for which cloner has rights to clone.
4159: # createdbefore - include courses for which creation date preceeded this date.
4160: # createdafter - include courses for which creation date followed this date.
4161: # creationcontext - include courses created in specified context
4162: #
4163: # domcloner - flag to indicate if user can create CCs in course's domain.
4164: # If so, ability to clone course is automatic.
4165: # hasuniquecode - filter by courses for which a six character unique code has
4166: # been set.
4167: #
4168: # $client - The socket open on the client.
4169: # Returns:
4170: # 1 - Continue processing.
4171: # Side Effects:
4172: # a reply is written to $client.
4173: sub dump_course_id_handler {
4174: my ($cmd, $tail, $client) = @_;
4175: my $userinput = "$cmd:$tail";
4176:
4177: my ($udom,$since,$description,$instcodefilter,$ownerfilter,$coursefilter,
4178: $typefilter,$regexp_ok,$rtn_as_hash,$selfenrollonly,$catfilter,$showhidden,
4179: $caller,$cloner,$cc_clone_list,$cloneonly,$createdbefore,$createdafter,
4180: $creationcontext,$domcloner,$hasuniquecode) =split(/:/,$tail);
4181: my $now = time;
4182: my ($cloneruname,$clonerudom,%cc_clone);
4183: if (defined($description)) {
4184: $description=&unescape($description);
4185: } else {
4186: $description='.';
4187: }
4188: if (defined($instcodefilter)) {
4189: $instcodefilter=&unescape($instcodefilter);
4190: } else {
4191: $instcodefilter='.';
4192: }
4193: my ($ownerunamefilter,$ownerdomfilter);
4194: if (defined($ownerfilter)) {
4195: $ownerfilter=&unescape($ownerfilter);
4196: if ($ownerfilter ne '.' && defined($ownerfilter)) {
4197: if ($ownerfilter =~ /^([^:]*):([^:]*)$/) {
4198: $ownerunamefilter = $1;
4199: $ownerdomfilter = $2;
4200: } else {
4201: $ownerunamefilter = $ownerfilter;
4202: $ownerdomfilter = '';
4203: }
4204: }
4205: } else {
4206: $ownerfilter='.';
4207: }
4208:
4209: if (defined($coursefilter)) {
4210: $coursefilter=&unescape($coursefilter);
4211: } else {
4212: $coursefilter='.';
4213: }
4214: if (defined($typefilter)) {
4215: $typefilter=&unescape($typefilter);
4216: } else {
4217: $typefilter='.';
4218: }
4219: if (defined($regexp_ok)) {
4220: $regexp_ok=&unescape($regexp_ok);
4221: }
4222: if (defined($catfilter)) {
4223: $catfilter=&unescape($catfilter);
4224: }
4225: if (defined($cloner)) {
4226: $cloner = &unescape($cloner);
4227: ($cloneruname,$clonerudom) = ($cloner =~ /^($LONCAPA::match_username):($LONCAPA::match_domain)$/);
4228: }
4229: if (defined($cc_clone_list)) {
4230: $cc_clone_list = &unescape($cc_clone_list);
4231: my @cc_cloners = split('&',$cc_clone_list);
4232: foreach my $cid (@cc_cloners) {
4233: my ($clonedom,$clonenum) = split(':',$cid);
4234: next if ($clonedom ne $udom);
4235: $cc_clone{$clonedom.'_'.$clonenum} = 1;
4236: }
4237: }
4238: if ($createdbefore ne '') {
4239: $createdbefore = &unescape($createdbefore);
4240: } else {
4241: $createdbefore = 0;
4242: }
4243: if ($createdafter ne '') {
4244: $createdafter = &unescape($createdafter);
4245: } else {
4246: $createdafter = 0;
4247: }
4248: if ($creationcontext ne '') {
4249: $creationcontext = &unescape($creationcontext);
4250: } else {
4251: $creationcontext = '.';
4252: }
4253: unless ($hasuniquecode) {
4254: $hasuniquecode = '.';
4255: }
4256: my $unpack = 1;
4257: if ($description eq '.' && $instcodefilter eq '.' && $ownerfilter eq '.' &&
4258: $typefilter eq '.') {
4259: $unpack = 0;
4260: }
4261: if (!defined($since)) { $since=0; }
4262: my $qresult='';
4263: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
4264: if ($hashref) {
4265: while (my ($key,$value) = each(%$hashref)) {
4266: my ($unesc_key,$lasttime_key,$lasttime,$is_hash,%val,
4267: %unesc_val,$selfenroll_end,$selfenroll_types,$created,
4268: $context);
4269: $unesc_key = &unescape($key);
4270: if ($unesc_key =~ /^lasttime:/) {
4271: next;
4272: } else {
4273: $lasttime_key = &escape('lasttime:'.$unesc_key);
4274: }
4275: if ($hashref->{$lasttime_key} ne '') {
4276: $lasttime = $hashref->{$lasttime_key};
4277: next if ($lasttime<$since);
4278: }
4279: my ($canclone,$valchange);
4280: my $items = &Apache::lonnet::thaw_unescape($value);
4281: if (ref($items) eq 'HASH') {
4282: if ($hashref->{$lasttime_key} eq '') {
4283: next if ($since > 1);
4284: }
4285: $is_hash = 1;
4286: if ($domcloner) {
4287: $canclone = 1;
4288: } elsif (defined($clonerudom)) {
4289: if ($items->{'cloners'}) {
4290: my @cloneable = split(',',$items->{'cloners'});
4291: if (@cloneable) {
4292: if (grep(/^\*$/,@cloneable)) {
4293: $canclone = 1;
4294: } elsif (grep(/^\*:\Q$clonerudom\E$/,@cloneable)) {
4295: $canclone = 1;
4296: } elsif (grep(/^\Q$cloneruname\E:\Q$clonerudom\E$/,@cloneable)) {
4297: $canclone = 1;
4298: }
4299: }
4300: unless ($canclone) {
4301: if ($cloneruname ne '' && $clonerudom ne '') {
4302: if ($cc_clone{$unesc_key}) {
4303: $canclone = 1;
4304: $items->{'cloners'} .= ','.$cloneruname.':'.
4305: $clonerudom;
4306: $valchange = 1;
4307: }
4308: }
4309: }
4310: } elsif (defined($cloneruname)) {
4311: if ($cc_clone{$unesc_key}) {
4312: $canclone = 1;
4313: $items->{'cloners'} = $cloneruname.':'.$clonerudom;
4314: $valchange = 1;
4315: }
4316: unless ($canclone) {
4317: if ($items->{'owner'} =~ /:/) {
4318: if ($items->{'owner'} eq $cloner) {
4319: $canclone = 1;
4320: }
4321: } elsif ($cloner eq $items->{'owner'}.':'.$udom) {
4322: $canclone = 1;
4323: }
4324: if ($canclone) {
4325: $items->{'cloners'} = $cloneruname.':'.$clonerudom;
4326: $valchange = 1;
4327: }
4328: }
4329: }
4330: }
4331: if ($unpack || !$rtn_as_hash) {
4332: $unesc_val{'descr'} = $items->{'description'};
4333: $unesc_val{'inst_code'} = $items->{'inst_code'};
4334: $unesc_val{'owner'} = $items->{'owner'};
4335: $unesc_val{'type'} = $items->{'type'};
4336: $unesc_val{'cloners'} = $items->{'cloners'};
4337: $unesc_val{'created'} = $items->{'created'};
4338: $unesc_val{'context'} = $items->{'context'};
4339: }
4340: $selfenroll_types = $items->{'selfenroll_types'};
4341: $selfenroll_end = $items->{'selfenroll_end_date'};
4342: $created = $items->{'created'};
4343: $context = $items->{'context'};
4344: if ($hasuniquecode ne '.') {
4345: next unless ($items->{'uniquecode'});
4346: }
4347: if ($selfenrollonly) {
4348: next if (!$selfenroll_types);
4349: if (($selfenroll_end > 0) && ($selfenroll_end <= $now)) {
4350: next;
4351: }
4352: }
4353: if ($creationcontext ne '.') {
4354: next if (($context ne '') && ($context ne $creationcontext));
4355: }
4356: if ($createdbefore > 0) {
4357: next if (($created eq '') || ($created > $createdbefore));
4358: }
4359: if ($createdafter > 0) {
4360: next if (($created eq '') || ($created <= $createdafter));
4361: }
4362: if ($catfilter ne '') {
4363: next if ($items->{'categories'} eq '');
4364: my @categories = split('&',$items->{'categories'});
4365: next if (@categories == 0);
4366: my @subcats = split('&',$catfilter);
4367: my $matchcat = 0;
4368: foreach my $cat (@categories) {
4369: if (grep(/^\Q$cat\E$/,@subcats)) {
4370: $matchcat = 1;
4371: last;
4372: }
4373: }
4374: next if (!$matchcat);
4375: }
4376: if ($caller eq 'coursecatalog') {
4377: if ($items->{'hidefromcat'} eq 'yes') {
4378: next if !$showhidden;
4379: }
4380: }
4381: } else {
4382: next if ($catfilter ne '');
4383: next if ($selfenrollonly);
4384: next if ($createdbefore || $createdafter);
4385: next if ($creationcontext ne '.');
4386: if ((defined($clonerudom)) && (defined($cloneruname))) {
4387: if ($cc_clone{$unesc_key}) {
4388: $canclone = 1;
4389: $val{'cloners'} = &escape($cloneruname.':'.$clonerudom);
4390: }
4391: }
4392: $is_hash = 0;
4393: my @courseitems = split(/:/,$value);
4394: $lasttime = pop(@courseitems);
4395: if ($hashref->{$lasttime_key} eq '') {
4396: next if ($lasttime<$since);
4397: }
4398: ($val{'descr'},$val{'inst_code'},$val{'owner'},$val{'type'}) = @courseitems;
4399: }
4400: if ($cloneonly) {
4401: next unless ($canclone);
4402: }
4403: my $match = 1;
4404: if ($description ne '.') {
4405: if (!$is_hash) {
4406: $unesc_val{'descr'} = &unescape($val{'descr'});
4407: }
4408: if (eval{$unesc_val{'descr'} !~ /\Q$description\E/i}) {
4409: $match = 0;
4410: }
4411: }
4412: if ($instcodefilter ne '.') {
4413: if (!$is_hash) {
4414: $unesc_val{'inst_code'} = &unescape($val{'inst_code'});
4415: }
4416: if ($regexp_ok == 1) {
4417: if (eval{$unesc_val{'inst_code'} !~ /$instcodefilter/}) {
4418: $match = 0;
4419: }
4420: } elsif ($regexp_ok == -1) {
4421: if (eval{$unesc_val{'inst_code'} =~ /$instcodefilter/}) {
4422: $match = 0;
4423: }
4424: } else {
4425: if (eval{$unesc_val{'inst_code'} !~ /\Q$instcodefilter\E/i}) {
4426: $match = 0;
4427: }
4428: }
4429: }
4430: if ($ownerfilter ne '.') {
4431: if (!$is_hash) {
4432: $unesc_val{'owner'} = &unescape($val{'owner'});
4433: }
4434: if (($ownerunamefilter ne '') && ($ownerdomfilter ne '')) {
4435: if ($unesc_val{'owner'} =~ /:/) {
4436: if (eval{$unesc_val{'owner'} !~
4437: /\Q$ownerunamefilter\E:\Q$ownerdomfilter\E$/i}) {
4438: $match = 0;
4439: }
4440: } else {
4441: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) {
4442: $match = 0;
4443: }
4444: }
4445: } elsif ($ownerunamefilter ne '') {
4446: if ($unesc_val{'owner'} =~ /:/) {
4447: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E:[^:]+$/i}) {
4448: $match = 0;
4449: }
4450: } else {
4451: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) {
4452: $match = 0;
4453: }
4454: }
4455: } elsif ($ownerdomfilter ne '') {
4456: if ($unesc_val{'owner'} =~ /:/) {
4457: if (eval{$unesc_val{'owner'} !~ /^[^:]+:\Q$ownerdomfilter\E/}) {
4458: $match = 0;
4459: }
4460: } else {
4461: if ($ownerdomfilter ne $udom) {
4462: $match = 0;
4463: }
4464: }
4465: }
4466: }
4467: if ($coursefilter ne '.') {
4468: if (eval{$unesc_key !~ /^$udom(_)\Q$coursefilter\E$/}) {
4469: $match = 0;
4470: }
4471: }
4472: if ($typefilter ne '.') {
4473: if (!$is_hash) {
4474: $unesc_val{'type'} = &unescape($val{'type'});
4475: }
4476: if ($unesc_val{'type'} eq '') {
4477: if ($typefilter ne 'Course') {
4478: $match = 0;
4479: }
4480: } else {
4481: if (eval{$unesc_val{'type'} !~ /^\Q$typefilter\E$/}) {
4482: $match = 0;
4483: }
4484: }
4485: }
4486: if ($match == 1) {
4487: if ($rtn_as_hash) {
4488: if ($is_hash) {
4489: if ($valchange) {
4490: my $newvalue = &Apache::lonnet::freeze_escape($items);
4491: $qresult.=$key.'='.$newvalue.'&';
4492: } else {
4493: $qresult.=$key.'='.$value.'&';
4494: }
4495: } else {
4496: my %rtnhash = ( 'description' => &unescape($val{'descr'}),
4497: 'inst_code' => &unescape($val{'inst_code'}),
4498: 'owner' => &unescape($val{'owner'}),
4499: 'type' => &unescape($val{'type'}),
4500: 'cloners' => &unescape($val{'cloners'}),
4501: );
4502: my $items = &Apache::lonnet::freeze_escape(\%rtnhash);
4503: $qresult.=$key.'='.$items.'&';
4504: }
4505: } else {
4506: if ($is_hash) {
4507: $qresult .= $key.'='.&escape($unesc_val{'descr'}).':'.
4508: &escape($unesc_val{'inst_code'}).':'.
4509: &escape($unesc_val{'owner'}).'&';
4510: } else {
4511: $qresult .= $key.'='.$val{'descr'}.':'.$val{'inst_code'}.
4512: ':'.$val{'owner'}.'&';
4513: }
4514: }
4515: }
4516: }
4517: if (&untie_domain_hash($hashref)) {
4518: chop($qresult);
4519: &Reply($client, \$qresult, $userinput);
4520: } else {
4521: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4522: "while attempting courseiddump\n", $userinput);
4523: }
4524: } else {
4525: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4526: "while attempting courseiddump\n", $userinput);
4527: }
4528: return 1;
4529: }
4530: ®ister_handler("courseiddump", \&dump_course_id_handler, 0, 1, 0);
4531:
4532: sub course_lastaccess_handler {
4533: my ($cmd, $tail, $client) = @_;
4534: my $userinput = "$cmd:$tail";
4535: my ($cdom,$cnum) = split(':',$tail);
4536: my (%lastaccess,$qresult);
4537: my $hashref = &tie_domain_hash($cdom, "nohist_courseids", &GDBM_WRCREAT());
4538: if ($hashref) {
4539: while (my ($key,$value) = each(%$hashref)) {
4540: my ($unesc_key,$lasttime);
4541: $unesc_key = &unescape($key);
4542: if ($cnum) {
4543: next unless ($unesc_key =~ /\Q$cdom\E_\Q$cnum\E$/);
4544: }
4545: if ($unesc_key =~ /^lasttime:($LONCAPA::match_domain\_$LONCAPA::match_courseid)/) {
4546: $lastaccess{$1} = $value;
4547: } else {
4548: my $items = &Apache::lonnet::thaw_unescape($value);
4549: if (ref($items) eq 'HASH') {
4550: unless ($lastaccess{$unesc_key}) {
4551: $lastaccess{$unesc_key} = '';
4552: }
4553: } else {
4554: my @courseitems = split(':',$value);
4555: $lastaccess{$unesc_key} = pop(@courseitems);
4556: }
4557: }
4558: }
4559: foreach my $cid (sort(keys(%lastaccess))) {
4560: $qresult.=&escape($cid).'='.$lastaccess{$cid}.'&';
4561: }
4562: if (&untie_domain_hash($hashref)) {
4563: if ($qresult) {
4564: chop($qresult);
4565: }
4566: &Reply($client, \$qresult, $userinput);
4567: } else {
4568: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4569: "while attempting lastacourseaccess\n", $userinput);
4570: }
4571: } else {
4572: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4573: "while attempting lastcourseaccess\n", $userinput);
4574: }
4575: return 1;
4576: }
4577: ®ister_handler("courselastaccess",\&course_lastaccess_handler, 0, 1, 0);
4578:
4579: #
4580: # Puts an unencrypted entry in a namespace db file at the domain level
4581: #
4582: # Parameters:
4583: # $cmd - The command that got us here.
4584: # $tail - Tail of the command (remaining parameters).
4585: # $client - File descriptor connected to client.
4586: # Returns
4587: # 0 - Requested to exit, caller should shut down.
4588: # 1 - Continue processing.
4589: # Side effects:
4590: # reply is written to $client.
4591: #
4592: sub put_domain_handler {
4593: my ($cmd,$tail,$client) = @_;
4594:
4595: my $userinput = "$cmd:$tail";
4596:
4597: my ($udom,$namespace,$what) =split(/:/,$tail,3);
4598: chomp($what);
4599: my @pairs=split(/\&/,$what);
4600: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_WRCREAT(),
4601: "P", $what);
4602: if ($hashref) {
4603: foreach my $pair (@pairs) {
4604: my ($key,$value)=split(/=/,$pair);
4605: $hashref->{$key}=$value;
4606: }
4607: if (&untie_domain_hash($hashref)) {
4608: &Reply($client, "ok\n", $userinput);
4609: } else {
4610: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4611: "while attempting putdom\n", $userinput);
4612: }
4613: } else {
4614: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4615: "while attempting putdom\n", $userinput);
4616: }
4617:
4618: return 1;
4619: }
4620: ®ister_handler("putdom", \&put_domain_handler, 0, 1, 0);
4621:
4622: # Unencrypted get from the namespace database file at the domain level.
4623: # This function retrieves a keyed item from a specific named database in the
4624: # domain directory.
4625: #
4626: # Parameters:
4627: # $cmd - Command request keyword (get).
4628: # $tail - Tail of the command. This is a colon separated list
4629: # consisting of the domain and the 'namespace'
4630: # which selects the gdbm file to do the lookup in,
4631: # & separated list of keys to lookup. Note that
4632: # the values are returned as an & separated list too.
4633: # $client - File descriptor open on the client.
4634: # Returns:
4635: # 1 - Continue processing.
4636: # 0 - Exit.
4637: # Side effects:
4638: # reply is written to $client.
4639: #
4640:
4641: sub get_domain_handler {
4642: my ($cmd, $tail, $client) = @_;
4643:
4644:
4645: my $userinput = "$cmd:$tail";
4646:
4647: my ($udom,$namespace,$what)=split(/:/,$tail,3);
4648: chomp($what);
4649: my @queries=split(/\&/,$what);
4650: my $qresult='';
4651: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_READER());
4652: if ($hashref) {
4653: for (my $i=0;$i<=$#queries;$i++) {
4654: $qresult.="$hashref->{$queries[$i]}&";
4655: }
4656: if (&untie_domain_hash($hashref)) {
4657: $qresult=~s/\&$//;
4658: &Reply($client, \$qresult, $userinput);
4659: } else {
4660: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
4661: "while attempting getdom\n",$userinput);
4662: }
4663: } else {
4664: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4665: "while attempting getdom\n",$userinput);
4666: }
4667:
4668: return 1;
4669: }
4670: ®ister_handler("getdom", \&get_domain_handler, 0, 1, 0);
4671:
4672: #
4673: # Puts an id to a domains id database.
4674: #
4675: # Parameters:
4676: # $cmd - The command that triggered us.
4677: # $tail - Remainder of the request other than the command. This is a
4678: # colon separated list containing:
4679: # $domain - The domain for which we are writing the id.
4680: # $pairs - The id info to write... this is and & separated list
4681: # of keyword=value.
4682: # $client - Socket open on the client.
4683: # Returns:
4684: # 1 - Continue processing.
4685: # Side effects:
4686: # reply is written to $client.
4687: #
4688: sub put_id_handler {
4689: my ($cmd,$tail,$client) = @_;
4690:
4691:
4692: my $userinput = "$cmd:$tail";
4693:
4694: my ($udom,$what)=split(/:/,$tail);
4695: chomp($what);
4696: my @pairs=split(/\&/,$what);
4697: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
4698: "P", $what);
4699: if ($hashref) {
4700: foreach my $pair (@pairs) {
4701: my ($key,$value)=split(/=/,$pair);
4702: $hashref->{$key}=$value;
4703: }
4704: if (&untie_domain_hash($hashref)) {
4705: &Reply($client, "ok\n", $userinput);
4706: } else {
4707: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4708: "while attempting idput\n", $userinput);
4709: }
4710: } else {
4711: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4712: "while attempting idput\n", $userinput);
4713: }
4714:
4715: return 1;
4716: }
4717: ®ister_handler("idput", \&put_id_handler, 0, 1, 0);
4718:
4719: #
4720: # Retrieves a set of id values from the id database.
4721: # Returns an & separated list of results, one for each requested id to the
4722: # client.
4723: #
4724: # Parameters:
4725: # $cmd - Command keyword that caused us to be dispatched.
4726: # $tail - Tail of the command. Consists of a colon separated:
4727: # domain - the domain whose id table we dump
4728: # ids Consists of an & separated list of
4729: # id keywords whose values will be fetched.
4730: # nonexisting keywords will have an empty value.
4731: # $client - Socket open on the client.
4732: #
4733: # Returns:
4734: # 1 - indicating processing should continue.
4735: # Side effects:
4736: # An & separated list of results is written to $client.
4737: #
4738: sub get_id_handler {
4739: my ($cmd, $tail, $client) = @_;
4740:
4741:
4742: my $userinput = "$client:$tail";
4743:
4744: my ($udom,$what)=split(/:/,$tail);
4745: chomp($what);
4746: my @queries=split(/\&/,$what);
4747: my $qresult='';
4748: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_READER());
4749: if ($hashref) {
4750: for (my $i=0;$i<=$#queries;$i++) {
4751: $qresult.="$hashref->{$queries[$i]}&";
4752: }
4753: if (&untie_domain_hash($hashref)) {
4754: $qresult=~s/\&$//;
4755: &Reply($client, \$qresult, $userinput);
4756: } else {
4757: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
4758: "while attempting idget\n",$userinput);
4759: }
4760: } else {
4761: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4762: "while attempting idget\n",$userinput);
4763: }
4764:
4765: return 1;
4766: }
4767: ®ister_handler("idget", \&get_id_handler, 0, 1, 0);
4768:
4769: # Deletes one or more ids in a domain's id database.
4770: #
4771: # Parameters:
4772: # $cmd - Command keyword (iddel).
4773: # $tail - Command tail. In this case a colon
4774: # separated list containing:
4775: # The domain for which we are deleting the id(s).
4776: # &-separated list of id(s) to delete.
4777: # $client - File open on client socket.
4778: # Returns:
4779: # 1 - Continue processing
4780: # 0 - Exit server.
4781: #
4782: #
4783:
4784: sub del_id_handler {
4785: my ($cmd,$tail,$client) = @_;
4786:
4787: my $userinput = "$cmd:$tail";
4788:
4789: my ($udom,$what)=split(/:/,$tail);
4790: chomp($what);
4791: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
4792: "D", $what);
4793: if ($hashref) {
4794: my @keys=split(/\&/,$what);
4795: foreach my $key (@keys) {
4796: delete($hashref->{$key});
4797: }
4798: if (&untie_user_hash($hashref)) {
4799: &Reply($client, "ok\n", $userinput);
4800: } else {
4801: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4802: "while attempting iddel\n", $userinput);
4803: }
4804: } else {
4805: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4806: "while attempting iddel\n", $userinput);
4807: }
4808: return 1;
4809: }
4810: ®ister_handler("iddel", \&del_id_handler, 0, 1, 0);
4811:
4812: #
4813: # Puts broadcast e-mail sent by Domain Coordinator in nohist_dcmail database
4814: #
4815: # Parameters
4816: # $cmd - Command keyword that caused us to be dispatched.
4817: # $tail - Tail of the command. Consists of a colon separated:
4818: # domain - the domain whose dcmail we are recording
4819: # email Consists of key=value pair
4820: # where key is unique msgid
4821: # and value is message (in XML)
4822: # $client - Socket open on the client.
4823: #
4824: # Returns:
4825: # 1 - indicating processing should continue.
4826: # Side effects
4827: # reply is written to $client.
4828: #
4829: sub put_dcmail_handler {
4830: my ($cmd,$tail,$client) = @_;
4831: my $userinput = "$cmd:$tail";
4832:
4833:
4834: my ($udom,$what)=split(/:/,$tail);
4835: chomp($what);
4836: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
4837: if ($hashref) {
4838: my ($key,$value)=split(/=/,$what);
4839: $hashref->{$key}=$value;
4840: }
4841: if (&untie_domain_hash($hashref)) {
4842: &Reply($client, "ok\n", $userinput);
4843: } else {
4844: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4845: "while attempting dcmailput\n", $userinput);
4846: }
4847: return 1;
4848: }
4849: ®ister_handler("dcmailput", \&put_dcmail_handler, 0, 1, 0);
4850:
4851: #
4852: # Retrieves broadcast e-mail from nohist_dcmail database
4853: # Returns to client an & separated list of key=value pairs,
4854: # where key is msgid and value is message information.
4855: #
4856: # Parameters
4857: # $cmd - Command keyword that caused us to be dispatched.
4858: # $tail - Tail of the command. Consists of a colon separated:
4859: # domain - the domain whose dcmail table we dump
4860: # startfilter - beginning of time window
4861: # endfilter - end of time window
4862: # sendersfilter - & separated list of username:domain
4863: # for senders to search for.
4864: # $client - Socket open on the client.
4865: #
4866: # Returns:
4867: # 1 - indicating processing should continue.
4868: # Side effects
4869: # reply (& separated list of msgid=messageinfo pairs) is
4870: # written to $client.
4871: #
4872: sub dump_dcmail_handler {
4873: my ($cmd, $tail, $client) = @_;
4874:
4875: my $userinput = "$cmd:$tail";
4876: my ($udom,$startfilter,$endfilter,$sendersfilter) = split(/:/,$tail);
4877: chomp($sendersfilter);
4878: my @senders = ();
4879: if (defined($startfilter)) {
4880: $startfilter=&unescape($startfilter);
4881: } else {
4882: $startfilter='.';
4883: }
4884: if (defined($endfilter)) {
4885: $endfilter=&unescape($endfilter);
4886: } else {
4887: $endfilter='.';
4888: }
4889: if (defined($sendersfilter)) {
4890: $sendersfilter=&unescape($sendersfilter);
4891: @senders = map { &unescape($_) } split(/\&/,$sendersfilter);
4892: }
4893:
4894: my $qresult='';
4895: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
4896: if ($hashref) {
4897: while (my ($key,$value) = each(%$hashref)) {
4898: my $match = 1;
4899: my ($timestamp,$subj,$uname,$udom) =
4900: split(/:/,&unescape(&unescape($key)),5); # yes, twice really
4901: $subj = &unescape($subj);
4902: unless ($startfilter eq '.' || !defined($startfilter)) {
4903: if ($timestamp < $startfilter) {
4904: $match = 0;
4905: }
4906: }
4907: unless ($endfilter eq '.' || !defined($endfilter)) {
4908: if ($timestamp > $endfilter) {
4909: $match = 0;
4910: }
4911: }
4912: unless (@senders < 1) {
4913: unless (grep/^$uname:$udom$/,@senders) {
4914: $match = 0;
4915: }
4916: }
4917: if ($match == 1) {
4918: $qresult.=$key.'='.$value.'&';
4919: }
4920: }
4921: if (&untie_domain_hash($hashref)) {
4922: chop($qresult);
4923: &Reply($client, \$qresult, $userinput);
4924: } else {
4925: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4926: "while attempting dcmaildump\n", $userinput);
4927: }
4928: } else {
4929: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4930: "while attempting dcmaildump\n", $userinput);
4931: }
4932: return 1;
4933: }
4934:
4935: ®ister_handler("dcmaildump", \&dump_dcmail_handler, 0, 1, 0);
4936:
4937: #
4938: # Puts domain roles in nohist_domainroles database
4939: #
4940: # Parameters
4941: # $cmd - Command keyword that caused us to be dispatched.
4942: # $tail - Tail of the command. Consists of a colon separated:
4943: # domain - the domain whose roles we are recording
4944: # role - Consists of key=value pair
4945: # where key is unique role
4946: # and value is start/end date information
4947: # $client - Socket open on the client.
4948: #
4949: # Returns:
4950: # 1 - indicating processing should continue.
4951: # Side effects
4952: # reply is written to $client.
4953: #
4954:
4955: sub put_domainroles_handler {
4956: my ($cmd,$tail,$client) = @_;
4957:
4958: my $userinput = "$cmd:$tail";
4959: my ($udom,$what)=split(/:/,$tail);
4960: chomp($what);
4961: my @pairs=split(/\&/,$what);
4962: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
4963: if ($hashref) {
4964: foreach my $pair (@pairs) {
4965: my ($key,$value)=split(/=/,$pair);
4966: $hashref->{$key}=$value;
4967: }
4968: if (&untie_domain_hash($hashref)) {
4969: &Reply($client, "ok\n", $userinput);
4970: } else {
4971: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4972: "while attempting domroleput\n", $userinput);
4973: }
4974: } else {
4975: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4976: "while attempting domroleput\n", $userinput);
4977: }
4978:
4979: return 1;
4980: }
4981:
4982: ®ister_handler("domroleput", \&put_domainroles_handler, 0, 1, 0);
4983:
4984: #
4985: # Retrieves domain roles from nohist_domainroles database
4986: # Returns to client an & separated list of key=value pairs,
4987: # where key is role and value is start and end date information.
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 domain roles table we dump
4993: # $client - Socket open on the client.
4994: #
4995: # Returns:
4996: # 1 - indicating processing should continue.
4997: # Side effects
4998: # reply (& separated list of role=start/end info pairs) is
4999: # written to $client.
5000: #
5001: sub dump_domainroles_handler {
5002: my ($cmd, $tail, $client) = @_;
5003:
5004: my $userinput = "$cmd:$tail";
5005: my ($udom,$startfilter,$endfilter,$rolesfilter) = split(/:/,$tail);
5006: chomp($rolesfilter);
5007: my @roles = ();
5008: if (defined($startfilter)) {
5009: $startfilter=&unescape($startfilter);
5010: } else {
5011: $startfilter='.';
5012: }
5013: if (defined($endfilter)) {
5014: $endfilter=&unescape($endfilter);
5015: } else {
5016: $endfilter='.';
5017: }
5018: if (defined($rolesfilter)) {
5019: $rolesfilter=&unescape($rolesfilter);
5020: @roles = split(/\&/,$rolesfilter);
5021: }
5022:
5023: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
5024: if ($hashref) {
5025: my $qresult = '';
5026: while (my ($key,$value) = each(%$hashref)) {
5027: my $match = 1;
5028: my ($end,$start) = split(/:/,&unescape($value));
5029: my ($trole,$uname,$udom,$runame,$rudom,$rsec) = split(/:/,&unescape($key));
5030: unless (@roles < 1) {
5031: unless (grep/^\Q$trole\E$/,@roles) {
5032: $match = 0;
5033: next;
5034: }
5035: }
5036: unless ($startfilter eq '.' || !defined($startfilter)) {
5037: if ((defined($start)) && ($start >= $startfilter)) {
5038: $match = 0;
5039: next;
5040: }
5041: }
5042: unless ($endfilter eq '.' || !defined($endfilter)) {
5043: if ((defined($end)) && (($end > 0) && ($end <= $endfilter))) {
5044: $match = 0;
5045: next;
5046: }
5047: }
5048: if ($match == 1) {
5049: $qresult.=$key.'='.$value.'&';
5050: }
5051: }
5052: if (&untie_domain_hash($hashref)) {
5053: chop($qresult);
5054: &Reply($client, \$qresult, $userinput);
5055: } else {
5056: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
5057: "while attempting domrolesdump\n", $userinput);
5058: }
5059: } else {
5060: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
5061: "while attempting domrolesdump\n", $userinput);
5062: }
5063: return 1;
5064: }
5065:
5066: ®ister_handler("domrolesdump", \&dump_domainroles_handler, 0, 1, 0);
5067:
5068:
5069: # Process the tmpput command I'm not sure what this does.. Seems to
5070: # create a file in the lonDaemons/tmp directory of the form $id.tmp
5071: # where Id is the client's ip concatenated with a sequence number.
5072: # The file will contain some value that is passed in. Is this e.g.
5073: # a login token?
5074: #
5075: # Parameters:
5076: # $cmd - The command that got us dispatched.
5077: # $tail - The remainder of the request following $cmd:
5078: # In this case this will be the contents of the file.
5079: # $client - Socket connected to the client.
5080: # Returns:
5081: # 1 indicating processing can continue.
5082: # Side effects:
5083: # A file is created in the local filesystem.
5084: # A reply is sent to the client.
5085: sub tmp_put_handler {
5086: my ($cmd, $what, $client) = @_;
5087:
5088: my $userinput = "$cmd:$what"; # Reconstruct for logging.
5089:
5090: my ($record,$context) = split(/:/,$what);
5091: if ($context ne '') {
5092: chomp($context);
5093: $context = &unescape($context);
5094: }
5095: my ($id,$store);
5096: $tmpsnum++;
5097: if (($context eq 'resetpw') || ($context eq 'createaccount')) {
5098: $id = &md5_hex(&md5_hex(time.{}.rand().$$));
5099: } else {
5100: $id = $$.'_'.$clientip.'_'.$tmpsnum;
5101: }
5102: $id=~s/\W/\_/g;
5103: $record=~s/\n//g;
5104: my $execdir=$perlvar{'lonDaemons'};
5105: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
5106: print $store $record;
5107: close $store;
5108: &Reply($client, \$id, $userinput);
5109: } else {
5110: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
5111: "while attempting tmpput\n", $userinput);
5112: }
5113: return 1;
5114:
5115: }
5116: ®ister_handler("tmpput", \&tmp_put_handler, 0, 1, 0);
5117:
5118: # Processes the tmpget command. This command returns the contents
5119: # of a temporary resource file(?) created via tmpput.
5120: #
5121: # Paramters:
5122: # $cmd - Command that got us dispatched.
5123: # $id - Tail of the command, contain the id of the resource
5124: # we want to fetch.
5125: # $client - socket open on the client.
5126: # Return:
5127: # 1 - Inidcating processing can continue.
5128: # Side effects:
5129: # A reply is sent to the client.
5130: #
5131: sub tmp_get_handler {
5132: my ($cmd, $id, $client) = @_;
5133:
5134: my $userinput = "$cmd:$id";
5135:
5136:
5137: $id=~s/\W/\_/g;
5138: my $store;
5139: my $execdir=$perlvar{'lonDaemons'};
5140: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
5141: my $reply=<$store>;
5142: &Reply( $client, \$reply, $userinput);
5143: close $store;
5144: } else {
5145: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
5146: "while attempting tmpget\n", $userinput);
5147: }
5148:
5149: return 1;
5150: }
5151: ®ister_handler("tmpget", \&tmp_get_handler, 0, 1, 0);
5152:
5153: #
5154: # Process the tmpdel command. This command deletes a temp resource
5155: # created by the tmpput command.
5156: #
5157: # Parameters:
5158: # $cmd - Command that got us here.
5159: # $id - Id of the temporary resource created.
5160: # $client - socket open on the client process.
5161: #
5162: # Returns:
5163: # 1 - Indicating processing should continue.
5164: # Side Effects:
5165: # A file is deleted
5166: # A reply is sent to the client.
5167: sub tmp_del_handler {
5168: my ($cmd, $id, $client) = @_;
5169:
5170: my $userinput= "$cmd:$id";
5171:
5172: chomp($id);
5173: $id=~s/\W/\_/g;
5174: my $execdir=$perlvar{'lonDaemons'};
5175: if (unlink("$execdir/tmp/$id.tmp")) {
5176: &Reply($client, "ok\n", $userinput);
5177: } else {
5178: &Failure( $client, "error: ".($!+0)."Unlink tmp Failed ".
5179: "while attempting tmpdel\n", $userinput);
5180: }
5181:
5182: return 1;
5183:
5184: }
5185: ®ister_handler("tmpdel", \&tmp_del_handler, 0, 1, 0);
5186:
5187: #
5188: # Process the delbalcookie command. This command deletes a balancer
5189: # cookie in the lonBalancedir directory created by switchserver
5190: #
5191: # Parameters:
5192: # $cmd - Command that got us here.
5193: # $cookie - Cookie to be deleted.
5194: # $client - socket open on the client process.
5195: #
5196: # Returns:
5197: # 1 - Indicating processing should continue.
5198: # Side Effects:
5199: # A cookie file is deleted from the lonBalancedir directory
5200: # A reply is sent to the client.
5201: sub del_balcookie_handler {
5202: my ($cmd, $cookie, $client) = @_;
5203:
5204: my $userinput= "$cmd:$cookie";
5205:
5206: chomp($cookie);
5207: my $deleted = '';
5208: if ($cookie =~ /^$LONCAPA::match_domain\_$LONCAPA::match_username\_[a-f0-9]{32}$/) {
5209: my $execdir=$perlvar{'lonBalanceDir'};
5210: if (-e "$execdir/$cookie.id") {
5211: if (open(my $fh,'<',"$execdir/$cookie.id")) {
5212: my $dodelete;
5213: while (my $line = <$fh>) {
5214: chomp($line);
5215: if ($line eq $clientname) {
5216: $dodelete = 1;
5217: last;
5218: }
5219: }
5220: close($fh);
5221: if ($dodelete) {
5222: if (unlink("$execdir/$cookie.id")) {
5223: $deleted = 1;
5224: }
5225: }
5226: }
5227: }
5228: }
5229: if ($deleted) {
5230: &Reply($client, "ok\n", $userinput);
5231: } else {
5232: &Failure( $client, "error: ".($!+0)."Unlinking cookie file Failed ".
5233: "while attempting delbalcookie\n", $userinput);
5234: }
5235: return 1;
5236: }
5237: ®ister_handler("delbalcookie", \&del_balcookie_handler, 0, 1, 0);
5238:
5239: #
5240: # Processes the setannounce command. This command
5241: # creates a file named announce.txt in the top directory of
5242: # the documentn root and sets its contents. The announce.txt file is
5243: # printed in its entirety at the LonCAPA login page. Note:
5244: # once the announcement.txt fileis created it cannot be deleted.
5245: # However, setting the contents of the file to empty removes the
5246: # announcement from the login page of loncapa so who cares.
5247: #
5248: # Parameters:
5249: # $cmd - The command that got us dispatched.
5250: # $announcement - The text of the announcement.
5251: # $client - Socket open on the client process.
5252: # Retunrns:
5253: # 1 - Indicating request processing should continue
5254: # Side Effects:
5255: # The file {DocRoot}/announcement.txt is created.
5256: # A reply is sent to $client.
5257: #
5258: sub set_announce_handler {
5259: my ($cmd, $announcement, $client) = @_;
5260:
5261: my $userinput = "$cmd:$announcement";
5262:
5263: chomp($announcement);
5264: $announcement=&unescape($announcement);
5265: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
5266: '/announcement.txt')) {
5267: print $store $announcement;
5268: close $store;
5269: &Reply($client, "ok\n", $userinput);
5270: } else {
5271: &Failure($client, "error: ".($!+0)."\n", $userinput);
5272: }
5273:
5274: return 1;
5275: }
5276: ®ister_handler("setannounce", \&set_announce_handler, 0, 1, 0);
5277:
5278: #
5279: # Return the version of the daemon. This can be used to determine
5280: # the compatibility of cross version installations or, alternatively to
5281: # simply know who's out of date and who isn't. Note that the version
5282: # is returned concatenated with the tail.
5283: # Parameters:
5284: # $cmd - the request that dispatched to us.
5285: # $tail - Tail of the request (client's version?).
5286: # $client - Socket open on the client.
5287: #Returns:
5288: # 1 - continue processing requests.
5289: # Side Effects:
5290: # Replies with version to $client.
5291: sub get_version_handler {
5292: my ($cmd, $tail, $client) = @_;
5293:
5294: my $userinput = $cmd.$tail;
5295:
5296: &Reply($client, &version($userinput)."\n", $userinput);
5297:
5298:
5299: return 1;
5300: }
5301: ®ister_handler("version", \&get_version_handler, 0, 1, 0);
5302:
5303: # Set the current host and domain. This is used to support
5304: # multihomed systems. Each IP of the system, or even separate daemons
5305: # on the same IP can be treated as handling a separate lonCAPA virtual
5306: # machine. This command selects the virtual lonCAPA. The client always
5307: # knows the right one since it is lonc and it is selecting the domain/system
5308: # from the hosts.tab file.
5309: # Parameters:
5310: # $cmd - Command that dispatched us.
5311: # $tail - Tail of the command (domain/host requested).
5312: # $socket - Socket open on the client.
5313: #
5314: # Returns:
5315: # 1 - Indicates the program should continue to process requests.
5316: # Side-effects:
5317: # The default domain/system context is modified for this daemon.
5318: # a reply is sent to the client.
5319: #
5320: sub set_virtual_host_handler {
5321: my ($cmd, $tail, $socket) = @_;
5322:
5323: my $userinput ="$cmd:$tail";
5324:
5325: &Reply($client, &sethost($userinput)."\n", $userinput);
5326:
5327:
5328: return 1;
5329: }
5330: ®ister_handler("sethost", \&set_virtual_host_handler, 0, 1, 0);
5331:
5332: # Process a request to exit:
5333: # - "bye" is sent to the client.
5334: # - The client socket is shutdown and closed.
5335: # - We indicate to the caller that we should exit.
5336: # Formal Parameters:
5337: # $cmd - The command that got us here.
5338: # $tail - Tail of the command (empty).
5339: # $client - Socket open on the tail.
5340: # Returns:
5341: # 0 - Indicating the program should exit!!
5342: #
5343: sub exit_handler {
5344: my ($cmd, $tail, $client) = @_;
5345:
5346: my $userinput = "$cmd:$tail";
5347:
5348: &logthis("Client $clientip ($clientname) hanging up: $userinput");
5349: &Reply($client, "bye\n", $userinput);
5350: $client->shutdown(2); # shutdown the socket forcibly.
5351: $client->close();
5352:
5353: return 0;
5354: }
5355: ®ister_handler("exit", \&exit_handler, 0,1,1);
5356: ®ister_handler("init", \&exit_handler, 0,1,1);
5357: ®ister_handler("quit", \&exit_handler, 0,1,1);
5358:
5359: # Determine if auto-enrollment is enabled.
5360: # Note that the original had what I believe to be a defect.
5361: # The original returned 0 if the requestor was not a registerd client.
5362: # It should return "refused".
5363: # Formal Parameters:
5364: # $cmd - The command that invoked us.
5365: # $tail - The tail of the command (Extra command parameters.
5366: # $client - The socket open on the client that issued the request.
5367: # Returns:
5368: # 1 - Indicating processing should continue.
5369: #
5370: sub enrollment_enabled_handler {
5371: my ($cmd, $tail, $client) = @_;
5372: my $userinput = $cmd.":".$tail; # For logging purposes.
5373:
5374:
5375: my ($cdom) = split(/:/, $tail, 2); # Domain we're asking about.
5376:
5377: my $outcome = &localenroll::run($cdom);
5378: &Reply($client, \$outcome, $userinput);
5379:
5380: return 1;
5381: }
5382: ®ister_handler("autorun", \&enrollment_enabled_handler, 0, 1, 0);
5383:
5384: #
5385: # Validate an institutional code used for a LON-CAPA course.
5386: #
5387: # Formal Parameters:
5388: # $cmd - The command request that got us dispatched.
5389: # $tail - The tail of the command. In this case,
5390: # this is a colon separated set of words that will be split
5391: # into:
5392: # $dom - The domain for which the check of
5393: # institutional course code will occur.
5394: #
5395: # $instcode - The institutional code for the course
5396: # being requested, or validated for rights
5397: # to request.
5398: #
5399: # $owner - The course requestor (who will be the
5400: # course owner, in the form username:domain
5401: #
5402: # $client - Socket open on the client.
5403: # Returns:
5404: # 1 - Indicating processing should continue.
5405: #
5406: sub validate_instcode_handler {
5407: my ($cmd, $tail, $client) = @_;
5408: my $userinput = "$cmd:$tail";
5409: my ($dom,$instcode,$owner) = split(/:/, $tail);
5410: $instcode = &unescape($instcode);
5411: $owner = &unescape($owner);
5412: my ($outcome,$description,$credits) =
5413: &localenroll::validate_instcode($dom,$instcode,$owner);
5414: my $result = &escape($outcome).'&'.&escape($description).'&'.
5415: &escape($credits);
5416: &Reply($client, \$result, $userinput);
5417:
5418: return 1;
5419: }
5420: ®ister_handler("autovalidateinstcode", \&validate_instcode_handler, 0, 1, 0);
5421:
5422: # Get the official sections for which auto-enrollment is possible.
5423: # Since the admin people won't know about 'unofficial sections'
5424: # we cannot auto-enroll on them.
5425: # Formal Parameters:
5426: # $cmd - The command request that got us dispatched here.
5427: # $tail - The remainder of the request. In our case this
5428: # will be split into:
5429: # $coursecode - The course name from the admin point of view.
5430: # $cdom - The course's domain(?).
5431: # $client - Socket open on the client.
5432: # Returns:
5433: # 1 - Indiciting processing should continue.
5434: #
5435: sub get_sections_handler {
5436: my ($cmd, $tail, $client) = @_;
5437: my $userinput = "$cmd:$tail";
5438:
5439: my ($coursecode, $cdom) = split(/:/, $tail);
5440: my @secs = &localenroll::get_sections($coursecode,$cdom);
5441: my $seclist = &escape(join(':',@secs));
5442:
5443: &Reply($client, \$seclist, $userinput);
5444:
5445:
5446: return 1;
5447: }
5448: ®ister_handler("autogetsections", \&get_sections_handler, 0, 1, 0);
5449:
5450: # Validate the owner of a new course section.
5451: #
5452: # Formal Parameters:
5453: # $cmd - Command that got us dispatched.
5454: # $tail - the remainder of the command. For us this consists of a
5455: # colon separated string containing:
5456: # $inst - Course Id from the institutions point of view.
5457: # $owner - Proposed owner of the course.
5458: # $cdom - Domain of the course (from the institutions
5459: # point of view?)..
5460: # $client - Socket open on the client.
5461: #
5462: # Returns:
5463: # 1 - Processing should continue.
5464: #
5465: sub validate_course_owner_handler {
5466: my ($cmd, $tail, $client) = @_;
5467: my $userinput = "$cmd:$tail";
5468: my ($inst_course_id, $owner, $cdom, $coowners) = split(/:/, $tail);
5469:
5470: $owner = &unescape($owner);
5471: $coowners = &unescape($coowners);
5472: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom,$coowners);
5473: &Reply($client, \$outcome, $userinput);
5474:
5475:
5476:
5477: return 1;
5478: }
5479: ®ister_handler("autonewcourse", \&validate_course_owner_handler, 0, 1, 0);
5480:
5481: #
5482: # Validate a course section in the official schedule of classes
5483: # from the institutions point of view (part of autoenrollment).
5484: #
5485: # Formal Parameters:
5486: # $cmd - The command request that got us dispatched.
5487: # $tail - The tail of the command. In this case,
5488: # this is a colon separated set of words that will be split
5489: # into:
5490: # $inst_course_id - The course/section id from the
5491: # institutions point of view.
5492: # $cdom - The domain from the institutions
5493: # point of view.
5494: # $client - Socket open on the client.
5495: # Returns:
5496: # 1 - Indicating processing should continue.
5497: #
5498: sub validate_course_section_handler {
5499: my ($cmd, $tail, $client) = @_;
5500: my $userinput = "$cmd:$tail";
5501: my ($inst_course_id, $cdom) = split(/:/, $tail);
5502:
5503: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
5504: &Reply($client, \$outcome, $userinput);
5505:
5506:
5507: return 1;
5508: }
5509: ®ister_handler("autovalidatecourse", \&validate_course_section_handler, 0, 1, 0);
5510:
5511: #
5512: # Validate course owner's access to enrollment data for specific class section.
5513: #
5514: #
5515: # Formal Parameters:
5516: # $cmd - The command request that got us dispatched.
5517: # $tail - The tail of the command. In this case this is a colon separated
5518: # set of values that will be split into:
5519: # $inst_class - Institutional code for the specific class section
5520: # $ownerlist - An escaped comma-separated list of username:domain
5521: # of the course owner, and co-owner(s).
5522: # $cdom - The domain of the course from the institution's
5523: # point of view.
5524: # $client - The socket open on the client.
5525: # Returns:
5526: # 1 - continue processing.
5527: #
5528:
5529: sub validate_class_access_handler {
5530: my ($cmd, $tail, $client) = @_;
5531: my $userinput = "$cmd:$tail";
5532: my ($inst_class,$ownerlist,$cdom) = split(/:/, $tail);
5533: my $owners = &unescape($ownerlist);
5534: my $outcome;
5535: eval {
5536: local($SIG{__DIE__})='DEFAULT';
5537: $outcome=&localenroll::check_section($inst_class,$owners,$cdom);
5538: };
5539: &Reply($client,\$outcome, $userinput);
5540:
5541: return 1;
5542: }
5543: ®ister_handler("autovalidateclass_sec", \&validate_class_access_handler, 0, 1, 0);
5544:
5545: #
5546: # Validate course owner or co-owners(s) access to enrollment data for all sections
5547: # and crosslistings for a particular course.
5548: #
5549: #
5550: # Formal Parameters:
5551: # $cmd - The command request that got us dispatched.
5552: # $tail - The tail of the command. In this case this is a colon separated
5553: # set of values that will be split into:
5554: # $ownerlist - An escaped comma-separated list of username:domain
5555: # of the course owner, and co-owner(s).
5556: # $cdom - The domain of the course from the institution's
5557: # point of view.
5558: # $classes - Frozen hash of institutional course sections and
5559: # crosslistings.
5560: # $client - The socket open on the client.
5561: # Returns:
5562: # 1 - continue processing.
5563: #
5564:
5565: sub validate_classes_handler {
5566: my ($cmd, $tail, $client) = @_;
5567: my $userinput = "$cmd:$tail";
5568: my ($ownerlist,$cdom,$classes) = split(/:/, $tail);
5569: my $classesref = &Apache::lonnet::thaw_unescape($classes);
5570: my $owners = &unescape($ownerlist);
5571: my $result;
5572: eval {
5573: local($SIG{__DIE__})='DEFAULT';
5574: my %validations;
5575: my $response = &localenroll::check_instclasses($owners,$cdom,$classesref,
5576: \%validations);
5577: if ($response eq 'ok') {
5578: foreach my $key (keys(%validations)) {
5579: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($validations{$key}).'&';
5580: }
5581: $result =~ s/\&$//;
5582: } else {
5583: $result = 'error';
5584: }
5585: };
5586: if (!$@) {
5587: &Reply($client, \$result, $userinput);
5588: } else {
5589: &Failure($client,"unknown_cmd\n",$userinput);
5590: }
5591: return 1;
5592: }
5593: ®ister_handler("autovalidateinstclasses", \&validate_classes_handler, 0, 1, 0);
5594:
5595: #
5596: # Create a password for a new LON-CAPA user added by auto-enrollment.
5597: # Only used for case where authentication method for new user is localauth
5598: #
5599: # Formal Parameters:
5600: # $cmd - The command request that got us dispatched.
5601: # $tail - The tail of the command. In this case this is a colon separated
5602: # set of words that will be split into:
5603: # $authparam - An authentication parameter (localauth parameter).
5604: # $cdom - The domain of the course from the institution's
5605: # point of view.
5606: # $client - The socket open on the client.
5607: # Returns:
5608: # 1 - continue processing.
5609: #
5610: sub create_auto_enroll_password_handler {
5611: my ($cmd, $tail, $client) = @_;
5612: my $userinput = "$cmd:$tail";
5613:
5614: my ($authparam, $cdom) = split(/:/, $userinput);
5615:
5616: my ($create_passwd,$authchk);
5617: ($authparam,
5618: $create_passwd,
5619: $authchk) = &localenroll::create_password($authparam,$cdom);
5620:
5621: &Reply($client, &escape($authparam.':'.$create_passwd.':'.$authchk)."\n",
5622: $userinput);
5623:
5624:
5625: return 1;
5626: }
5627: ®ister_handler("autocreatepassword", \&create_auto_enroll_password_handler,
5628: 0, 1, 0);
5629:
5630: sub auto_export_grades_handler {
5631: my ($cmd, $tail, $client) = @_;
5632: my $userinput = "$cmd:$tail";
5633: my ($cdom,$cnum,$info,$data) = split(/:/,$tail);
5634: my $inforef = &Apache::lonnet::thaw_unescape($info);
5635: my $dataref = &Apache::lonnet::thaw_unescape($data);
5636: my ($outcome,$result);;
5637: eval {
5638: local($SIG{__DIE__})='DEFAULT';
5639: my %rtnhash;
5640: $outcome=&localenroll::export_grades($cdom,$cnum,$inforef,$dataref,\%rtnhash);
5641: if ($outcome eq 'ok') {
5642: foreach my $key (keys(%rtnhash)) {
5643: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rtnhash{$key}).'&';
5644: }
5645: $result =~ s/\&$//;
5646: }
5647: };
5648: if (!$@) {
5649: if ($outcome eq 'ok') {
5650: if ($cipher) {
5651: my $cmdlength=length($result);
5652: $result.=" ";
5653: my $encresult='';
5654: for (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
5655: $encresult.= unpack("H16",
5656: $cipher->encrypt(substr($result,
5657: $encidx,
5658: 8)));
5659: }
5660: &Reply( $client, "enc:$cmdlength:$encresult\n", $userinput);
5661: } else {
5662: &Failure( $client, "error:no_key\n", $userinput);
5663: }
5664: } else {
5665: &Reply($client, "$outcome\n", $userinput);
5666: }
5667: } else {
5668: &Failure($client,"export_error\n",$userinput);
5669: }
5670: return 1;
5671: }
5672: ®ister_handler("autoexportgrades", \&auto_export_grades_handler,
5673: 1, 1, 0);
5674:
5675:
5676: # Retrieve and remove temporary files created by/during autoenrollment.
5677: #
5678: # Formal Parameters:
5679: # $cmd - The command that got us dispatched.
5680: # $tail - The tail of the command. In our case this is a colon
5681: # separated list that will be split into:
5682: # $filename - The name of the file to retrieve.
5683: # The filename is given as a path relative to
5684: # the LonCAPA temp file directory.
5685: # $client - Socket open on the client.
5686: #
5687: # Returns:
5688: # 1 - Continue processing.
5689: sub retrieve_auto_file_handler {
5690: my ($cmd, $tail, $client) = @_;
5691: my $userinput = "cmd:$tail";
5692:
5693: my ($filename) = split(/:/, $tail);
5694:
5695: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
5696: if ($filename =~m{/\.\./}) {
5697: &Failure($client, "refused\n", $userinput);
5698: } elsif ($filename !~ /^$LONCAPA::match_domain\_$LONCAPA::match_courseid\_.+_classlist\.xml$/) {
5699: &Failure($client, "refused\n", $userinput);
5700: } elsif ( (-e $source) && ($filename ne '') ) {
5701: my $reply = '';
5702: if (open(my $fh,$source)) {
5703: while (<$fh>) {
5704: chomp($_);
5705: $_ =~ s/^\s+//g;
5706: $_ =~ s/\s+$//g;
5707: $reply .= $_;
5708: }
5709: close($fh);
5710: &Reply($client, &escape($reply)."\n", $userinput);
5711:
5712: # Does this have to be uncommented??!? (RF).
5713: #
5714: # unlink($source);
5715: } else {
5716: &Failure($client, "error\n", $userinput);
5717: }
5718: } else {
5719: &Failure($client, "error\n", $userinput);
5720: }
5721:
5722:
5723: return 1;
5724: }
5725: ®ister_handler("autoretrieve", \&retrieve_auto_file_handler, 0,1,0);
5726:
5727: sub crsreq_checks_handler {
5728: my ($cmd, $tail, $client) = @_;
5729: my $userinput = "$cmd:$tail";
5730: my $dom = $tail;
5731: my $result;
5732: my @reqtypes = ('official','unofficial','community','textbook');
5733: eval {
5734: local($SIG{__DIE__})='DEFAULT';
5735: my %validations;
5736: my $response = &localenroll::crsreq_checks($dom,\@reqtypes,
5737: \%validations);
5738: if ($response eq 'ok') {
5739: foreach my $key (keys(%validations)) {
5740: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($validations{$key}).'&';
5741: }
5742: $result =~ s/\&$//;
5743: } else {
5744: $result = 'error';
5745: }
5746: };
5747: if (!$@) {
5748: &Reply($client, \$result, $userinput);
5749: } else {
5750: &Failure($client,"unknown_cmd\n",$userinput);
5751: }
5752: return 1;
5753: }
5754: ®ister_handler("autocrsreqchecks", \&crsreq_checks_handler, 0, 1, 0);
5755:
5756: sub validate_crsreq_handler {
5757: my ($cmd, $tail, $client) = @_;
5758: my $userinput = "$cmd:$tail";
5759: my ($dom,$owner,$crstype,$inststatuslist,$instcode,$instseclist,$customdata) = split(/:/, $tail);
5760: $instcode = &unescape($instcode);
5761: $owner = &unescape($owner);
5762: $crstype = &unescape($crstype);
5763: $inststatuslist = &unescape($inststatuslist);
5764: $instcode = &unescape($instcode);
5765: $instseclist = &unescape($instseclist);
5766: my $custominfo = &Apache::lonnet::thaw_unescape($customdata);
5767: my $outcome;
5768: eval {
5769: local($SIG{__DIE__})='DEFAULT';
5770: $outcome = &localenroll::validate_crsreq($dom,$owner,$crstype,
5771: $inststatuslist,$instcode,
5772: $instseclist,$custominfo);
5773: };
5774: if (!$@) {
5775: &Reply($client, \$outcome, $userinput);
5776: } else {
5777: &Failure($client,"unknown_cmd\n",$userinput);
5778: }
5779: return 1;
5780: }
5781: ®ister_handler("autocrsreqvalidation", \&validate_crsreq_handler, 0, 1, 0);
5782:
5783: sub crsreq_update_handler {
5784: my ($cmd, $tail, $client) = @_;
5785: my $userinput = "$cmd:$tail";
5786: my ($cdom,$cnum,$crstype,$action,$ownername,$ownerdomain,$fullname,$title,$code,
5787: $accessstart,$accessend,$infohashref) =
5788: split(/:/, $tail);
5789: $crstype = &unescape($crstype);
5790: $action = &unescape($action);
5791: $ownername = &unescape($ownername);
5792: $ownerdomain = &unescape($ownerdomain);
5793: $fullname = &unescape($fullname);
5794: $title = &unescape($title);
5795: $code = &unescape($code);
5796: $accessstart = &unescape($accessstart);
5797: $accessend = &unescape($accessend);
5798: my $incoming = &Apache::lonnet::thaw_unescape($infohashref);
5799: my ($result,$outcome);
5800: eval {
5801: local($SIG{__DIE__})='DEFAULT';
5802: my %rtnhash;
5803: $outcome = &localenroll::crsreq_updates($cdom,$cnum,$crstype,$action,
5804: $ownername,$ownerdomain,$fullname,
5805: $title,$code,$accessstart,$accessend,
5806: $incoming,\%rtnhash);
5807: if ($outcome eq 'ok') {
5808: my @posskeys = qw(createdweb createdmsg createdcustomized createdactions queuedweb queuedmsg formitems reviewweb validationjs onload javascript);
5809: foreach my $key (keys(%rtnhash)) {
5810: if (grep(/^\Q$key\E/,@posskeys)) {
5811: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rtnhash{$key}).'&';
5812: }
5813: }
5814: $result =~ s/\&$//;
5815: }
5816: };
5817: if (!$@) {
5818: if ($outcome eq 'ok') {
5819: &Reply($client, \$result, $userinput);
5820: } else {
5821: &Reply($client, "format_error\n", $userinput);
5822: }
5823: } else {
5824: &Failure($client,"unknown_cmd\n",$userinput);
5825: }
5826: return 1;
5827: }
5828: ®ister_handler("autocrsrequpdate", \&crsreq_update_handler, 0, 1, 0);
5829:
5830: #
5831: # Read and retrieve institutional code format (for support form).
5832: # Formal Parameters:
5833: # $cmd - Command that dispatched us.
5834: # $tail - Tail of the command. In this case it conatins
5835: # the course domain and the coursename.
5836: # $client - Socket open on the client.
5837: # Returns:
5838: # 1 - Continue processing.
5839: #
5840: sub get_institutional_code_format_handler {
5841: my ($cmd, $tail, $client) = @_;
5842: my $userinput = "$cmd:$tail";
5843:
5844: my $reply;
5845: my($cdom,$course) = split(/:/,$tail);
5846: my @pairs = split/\&/,$course;
5847: my %instcodes = ();
5848: my %codes = ();
5849: my @codetitles = ();
5850: my %cat_titles = ();
5851: my %cat_order = ();
5852: foreach (@pairs) {
5853: my ($key,$value) = split/=/,$_;
5854: $instcodes{&unescape($key)} = &unescape($value);
5855: }
5856: my $formatreply = &localenroll::instcode_format($cdom,
5857: \%instcodes,
5858: \%codes,
5859: \@codetitles,
5860: \%cat_titles,
5861: \%cat_order);
5862: if ($formatreply eq 'ok') {
5863: my $codes_str = &Apache::lonnet::hash2str(%codes);
5864: my $codetitles_str = &Apache::lonnet::array2str(@codetitles);
5865: my $cat_titles_str = &Apache::lonnet::hash2str(%cat_titles);
5866: my $cat_order_str = &Apache::lonnet::hash2str(%cat_order);
5867: &Reply($client,
5868: $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'
5869: .$cat_order_str."\n",
5870: $userinput);
5871: } else {
5872: # this else branch added by RF since if not ok, lonc will
5873: # hang waiting on reply until timeout.
5874: #
5875: &Reply($client, "format_error\n", $userinput);
5876: }
5877:
5878: return 1;
5879: }
5880: ®ister_handler("autoinstcodeformat",
5881: \&get_institutional_code_format_handler,0,1,0);
5882:
5883: sub get_institutional_defaults_handler {
5884: my ($cmd, $tail, $client) = @_;
5885: my $userinput = "$cmd:$tail";
5886:
5887: my $dom = $tail;
5888: my %defaults_hash;
5889: my @code_order;
5890: my $outcome;
5891: eval {
5892: local($SIG{__DIE__})='DEFAULT';
5893: $outcome = &localenroll::instcode_defaults($dom,\%defaults_hash,
5894: \@code_order);
5895: };
5896: if (!$@) {
5897: if ($outcome eq 'ok') {
5898: my $result='';
5899: while (my ($key,$value) = each(%defaults_hash)) {
5900: $result.=&escape($key).'='.&escape($value).'&';
5901: }
5902: $result .= 'code_order='.&escape(join('&',@code_order));
5903: &Reply($client,\$result,$userinput);
5904: } else {
5905: &Reply($client,"error\n", $userinput);
5906: }
5907: } else {
5908: &Failure($client,"unknown_cmd\n",$userinput);
5909: }
5910: }
5911: ®ister_handler("autoinstcodedefaults",
5912: \&get_institutional_defaults_handler,0,1,0);
5913:
5914: sub get_possible_instcodes_handler {
5915: my ($cmd, $tail, $client) = @_;
5916: my $userinput = "$cmd:$tail";
5917:
5918: my $reply;
5919: my $cdom = $tail;
5920: my (@codetitles,%cat_titles,%cat_order,@code_order);
5921: my $formatreply = &localenroll::possible_instcodes($cdom,
5922: \@codetitles,
5923: \%cat_titles,
5924: \%cat_order,
5925: \@code_order);
5926: if ($formatreply eq 'ok') {
5927: my $result = join('&',map {&escape($_);} (@codetitles)).':';
5928: $result .= join('&',map {&escape($_);} (@code_order)).':';
5929: foreach my $key (keys(%cat_titles)) {
5930: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($cat_titles{$key}).'&';
5931: }
5932: $result =~ s/\&$//;
5933: $result .= ':';
5934: foreach my $key (keys(%cat_order)) {
5935: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($cat_order{$key}).'&';
5936: }
5937: $result =~ s/\&$//;
5938: &Reply($client,\$result,$userinput);
5939: } else {
5940: &Reply($client, "format_error\n", $userinput);
5941: }
5942: return 1;
5943: }
5944: ®ister_handler("autopossibleinstcodes",
5945: \&get_possible_instcodes_handler,0,1,0);
5946:
5947: sub get_institutional_user_rules {
5948: my ($cmd, $tail, $client) = @_;
5949: my $userinput = "$cmd:$tail";
5950: my $dom = &unescape($tail);
5951: my (%rules_hash,@rules_order);
5952: my $outcome;
5953: eval {
5954: local($SIG{__DIE__})='DEFAULT';
5955: $outcome = &localenroll::username_rules($dom,\%rules_hash,\@rules_order);
5956: };
5957: if (!$@) {
5958: if ($outcome eq 'ok') {
5959: my $result;
5960: foreach my $key (keys(%rules_hash)) {
5961: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
5962: }
5963: $result =~ s/\&$//;
5964: $result .= ':';
5965: if (@rules_order > 0) {
5966: foreach my $item (@rules_order) {
5967: $result .= &escape($item).'&';
5968: }
5969: }
5970: $result =~ s/\&$//;
5971: &Reply($client,\$result,$userinput);
5972: } else {
5973: &Reply($client,"error\n", $userinput);
5974: }
5975: } else {
5976: &Failure($client,"unknown_cmd\n",$userinput);
5977: }
5978: }
5979: ®ister_handler("instuserrules",\&get_institutional_user_rules,0,1,0);
5980:
5981: sub get_institutional_id_rules {
5982: my ($cmd, $tail, $client) = @_;
5983: my $userinput = "$cmd:$tail";
5984: my $dom = &unescape($tail);
5985: my (%rules_hash,@rules_order);
5986: my $outcome;
5987: eval {
5988: local($SIG{__DIE__})='DEFAULT';
5989: $outcome = &localenroll::id_rules($dom,\%rules_hash,\@rules_order);
5990: };
5991: if (!$@) {
5992: if ($outcome eq 'ok') {
5993: my $result;
5994: foreach my $key (keys(%rules_hash)) {
5995: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
5996: }
5997: $result =~ s/\&$//;
5998: $result .= ':';
5999: if (@rules_order > 0) {
6000: foreach my $item (@rules_order) {
6001: $result .= &escape($item).'&';
6002: }
6003: }
6004: $result =~ s/\&$//;
6005: &Reply($client,\$result,$userinput);
6006: } else {
6007: &Reply($client,"error\n", $userinput);
6008: }
6009: } else {
6010: &Failure($client,"unknown_cmd\n",$userinput);
6011: }
6012: }
6013: ®ister_handler("instidrules",\&get_institutional_id_rules,0,1,0);
6014:
6015: sub get_institutional_selfcreate_rules {
6016: my ($cmd, $tail, $client) = @_;
6017: my $userinput = "$cmd:$tail";
6018: my $dom = &unescape($tail);
6019: my (%rules_hash,@rules_order);
6020: my $outcome;
6021: eval {
6022: local($SIG{__DIE__})='DEFAULT';
6023: $outcome = &localenroll::selfcreate_rules($dom,\%rules_hash,\@rules_order);
6024: };
6025: if (!$@) {
6026: if ($outcome eq 'ok') {
6027: my $result;
6028: foreach my $key (keys(%rules_hash)) {
6029: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
6030: }
6031: $result =~ s/\&$//;
6032: $result .= ':';
6033: if (@rules_order > 0) {
6034: foreach my $item (@rules_order) {
6035: $result .= &escape($item).'&';
6036: }
6037: }
6038: $result =~ s/\&$//;
6039: &Reply($client,\$result,$userinput);
6040: } else {
6041: &Reply($client,"error\n", $userinput);
6042: }
6043: } else {
6044: &Failure($client,"unknown_cmd\n",$userinput);
6045: }
6046: }
6047: ®ister_handler("instemailrules",\&get_institutional_selfcreate_rules,0,1,0);
6048:
6049:
6050: sub institutional_username_check {
6051: my ($cmd, $tail, $client) = @_;
6052: my $userinput = "$cmd:$tail";
6053: my %rulecheck;
6054: my $outcome;
6055: my ($udom,$uname,@rules) = split(/:/,$tail);
6056: $udom = &unescape($udom);
6057: $uname = &unescape($uname);
6058: @rules = map {&unescape($_);} (@rules);
6059: eval {
6060: local($SIG{__DIE__})='DEFAULT';
6061: $outcome = &localenroll::username_check($udom,$uname,\@rules,\%rulecheck);
6062: };
6063: if (!$@) {
6064: if ($outcome eq 'ok') {
6065: my $result='';
6066: foreach my $key (keys(%rulecheck)) {
6067: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
6068: }
6069: &Reply($client,\$result,$userinput);
6070: } else {
6071: &Reply($client,"error\n", $userinput);
6072: }
6073: } else {
6074: &Failure($client,"unknown_cmd\n",$userinput);
6075: }
6076: }
6077: ®ister_handler("instrulecheck",\&institutional_username_check,0,1,0);
6078:
6079: sub institutional_id_check {
6080: my ($cmd, $tail, $client) = @_;
6081: my $userinput = "$cmd:$tail";
6082: my %rulecheck;
6083: my $outcome;
6084: my ($udom,$id,@rules) = split(/:/,$tail);
6085: $udom = &unescape($udom);
6086: $id = &unescape($id);
6087: @rules = map {&unescape($_);} (@rules);
6088: eval {
6089: local($SIG{__DIE__})='DEFAULT';
6090: $outcome = &localenroll::id_check($udom,$id,\@rules,\%rulecheck);
6091: };
6092: if (!$@) {
6093: if ($outcome eq 'ok') {
6094: my $result='';
6095: foreach my $key (keys(%rulecheck)) {
6096: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
6097: }
6098: &Reply($client,\$result,$userinput);
6099: } else {
6100: &Reply($client,"error\n", $userinput);
6101: }
6102: } else {
6103: &Failure($client,"unknown_cmd\n",$userinput);
6104: }
6105: }
6106: ®ister_handler("instidrulecheck",\&institutional_id_check,0,1,0);
6107:
6108: sub institutional_selfcreate_check {
6109: my ($cmd, $tail, $client) = @_;
6110: my $userinput = "$cmd:$tail";
6111: my %rulecheck;
6112: my $outcome;
6113: my ($udom,$email,@rules) = split(/:/,$tail);
6114: $udom = &unescape($udom);
6115: $email = &unescape($email);
6116: @rules = map {&unescape($_);} (@rules);
6117: eval {
6118: local($SIG{__DIE__})='DEFAULT';
6119: $outcome = &localenroll::selfcreate_check($udom,$email,\@rules,\%rulecheck);
6120: };
6121: if (!$@) {
6122: if ($outcome eq 'ok') {
6123: my $result='';
6124: foreach my $key (keys(%rulecheck)) {
6125: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
6126: }
6127: &Reply($client,\$result,$userinput);
6128: } else {
6129: &Reply($client,"error\n", $userinput);
6130: }
6131: } else {
6132: &Failure($client,"unknown_cmd\n",$userinput);
6133: }
6134: }
6135: ®ister_handler("instselfcreatecheck",\&institutional_selfcreate_check,0,1,0);
6136:
6137: # Get domain specific conditions for import of student photographs to a course
6138: #
6139: # Retrieves information from photo_permission subroutine in localenroll.
6140: # Returns outcome (ok) if no processing errors, and whether course owner is
6141: # required to accept conditions of use (yes/no).
6142: #
6143: #
6144: sub photo_permission_handler {
6145: my ($cmd, $tail, $client) = @_;
6146: my $userinput = "$cmd:$tail";
6147: my $cdom = $tail;
6148: my ($perm_reqd,$conditions);
6149: my $outcome;
6150: eval {
6151: local($SIG{__DIE__})='DEFAULT';
6152: $outcome = &localenroll::photo_permission($cdom,\$perm_reqd,
6153: \$conditions);
6154: };
6155: if (!$@) {
6156: &Reply($client, &escape($outcome.':'.$perm_reqd.':'. $conditions)."\n",
6157: $userinput);
6158: } else {
6159: &Failure($client,"unknown_cmd\n",$userinput);
6160: }
6161: return 1;
6162: }
6163: ®ister_handler("autophotopermission",\&photo_permission_handler,0,1,0);
6164:
6165: #
6166: # Checks if student photo is available for a user in the domain, in the user's
6167: # directory (in /userfiles/internal/studentphoto.jpg).
6168: # Uses localstudentphoto:fetch() to ensure there is an up to date copy of
6169: # the student's photo.
6170:
6171: sub photo_check_handler {
6172: my ($cmd, $tail, $client) = @_;
6173: my $userinput = "$cmd:$tail";
6174: my ($udom,$uname,$pid) = split(/:/,$tail);
6175: $udom = &unescape($udom);
6176: $uname = &unescape($uname);
6177: $pid = &unescape($pid);
6178: my $path=&propath($udom,$uname).'/userfiles/internal/';
6179: if (!-e $path) {
6180: &mkpath($path);
6181: }
6182: my $response;
6183: my $result = &localstudentphoto::fetch($udom,$uname,$pid,\$response);
6184: $result .= ':'.$response;
6185: &Reply($client, &escape($result)."\n",$userinput);
6186: return 1;
6187: }
6188: ®ister_handler("autophotocheck",\&photo_check_handler,0,1,0);
6189:
6190: #
6191: # Retrieve information from localenroll about whether to provide a button
6192: # for users who have enbled import of student photos to initiate an
6193: # update of photo files for registered students. Also include
6194: # comment to display alongside button.
6195:
6196: sub photo_choice_handler {
6197: my ($cmd, $tail, $client) = @_;
6198: my $userinput = "$cmd:$tail";
6199: my $cdom = &unescape($tail);
6200: my ($update,$comment);
6201: eval {
6202: local($SIG{__DIE__})='DEFAULT';
6203: ($update,$comment) = &localenroll::manager_photo_update($cdom);
6204: };
6205: if (!$@) {
6206: &Reply($client,&escape($update).':'.&escape($comment)."\n",$userinput);
6207: } else {
6208: &Failure($client,"unknown_cmd\n",$userinput);
6209: }
6210: return 1;
6211: }
6212: ®ister_handler("autophotochoice",\&photo_choice_handler,0,1,0);
6213:
6214: #
6215: # Gets a student's photo to exist (in the correct image type) in the user's
6216: # directory.
6217: # Formal Parameters:
6218: # $cmd - The command request that got us dispatched.
6219: # $tail - A colon separated set of words that will be split into:
6220: # $domain - student's domain
6221: # $uname - student username
6222: # $type - image type desired
6223: # $client - The socket open on the client.
6224: # Returns:
6225: # 1 - continue processing.
6226:
6227: sub student_photo_handler {
6228: my ($cmd, $tail, $client) = @_;
6229: my ($domain,$uname,$ext,$type) = split(/:/, $tail);
6230:
6231: my $path=&propath($domain,$uname). '/userfiles/internal/';
6232: my $filename = 'studentphoto.'.$ext;
6233: if ($type eq 'thumbnail') {
6234: $filename = 'studentphoto_tn.'.$ext;
6235: }
6236: if (-e $path.$filename) {
6237: &Reply($client,"ok\n","$cmd:$tail");
6238: return 1;
6239: }
6240: &mkpath($path);
6241: my $file;
6242: if ($type eq 'thumbnail') {
6243: eval {
6244: local($SIG{__DIE__})='DEFAULT';
6245: $file=&localstudentphoto::fetch_thumbnail($domain,$uname);
6246: };
6247: } else {
6248: $file=&localstudentphoto::fetch($domain,$uname);
6249: }
6250: if (!$file) {
6251: &Failure($client,"unavailable\n","$cmd:$tail");
6252: return 1;
6253: }
6254: if (!-e $path.$filename) { &convert_photo($file,$path.$filename); }
6255: if (-e $path.$filename) {
6256: &Reply($client,"ok\n","$cmd:$tail");
6257: return 1;
6258: }
6259: &Failure($client,"unable_to_convert\n","$cmd:$tail");
6260: return 1;
6261: }
6262: ®ister_handler("studentphoto", \&student_photo_handler, 0, 1, 0);
6263:
6264: sub inst_usertypes_handler {
6265: my ($cmd, $domain, $client) = @_;
6266: my $res;
6267: my $userinput = $cmd.":".$domain; # For logging purposes.
6268: my (%typeshash,@order,$result);
6269: eval {
6270: local($SIG{__DIE__})='DEFAULT';
6271: $result=&localenroll::inst_usertypes($domain,\%typeshash,\@order);
6272: };
6273: if ($result eq 'ok') {
6274: if (keys(%typeshash) > 0) {
6275: foreach my $key (keys(%typeshash)) {
6276: $res.=&escape($key).'='.&escape($typeshash{$key}).'&';
6277: }
6278: }
6279: $res=~s/\&$//;
6280: $res .= ':';
6281: if (@order > 0) {
6282: foreach my $item (@order) {
6283: $res .= &escape($item).'&';
6284: }
6285: }
6286: $res=~s/\&$//;
6287: }
6288: &Reply($client, \$res, $userinput);
6289: return 1;
6290: }
6291: ®ister_handler("inst_usertypes", \&inst_usertypes_handler, 0, 1, 0);
6292:
6293: # mkpath makes all directories for a file, expects an absolute path with a
6294: # file or a trailing / if just a dir is passed
6295: # returns 1 on success 0 on failure
6296: sub mkpath {
6297: my ($file)=@_;
6298: my @parts=split(/\//,$file,-1);
6299: my $now=$parts[0].'/'.$parts[1].'/'.$parts[2];
6300: for (my $i=3;$i<= ($#parts-1);$i++) {
6301: $now.='/'.$parts[$i];
6302: if (!-e $now) {
6303: if (!mkdir($now,0770)) { return 0; }
6304: }
6305: }
6306: return 1;
6307: }
6308:
6309: #---------------------------------------------------------------
6310: #
6311: # Getting, decoding and dispatching requests:
6312: #
6313: #
6314: # Get a Request:
6315: # Gets a Request message from the client. The transaction
6316: # is defined as a 'line' of text. We remove the new line
6317: # from the text line.
6318: #
6319: sub get_request {
6320: my $input = <$client>;
6321: chomp($input);
6322:
6323: &Debug("get_request: Request = $input\n");
6324:
6325: &status('Processing '.$clientname.':'.$input);
6326:
6327: return $input;
6328: }
6329: #---------------------------------------------------------------
6330: #
6331: # Process a request. This sub should shrink as each action
6332: # gets farmed out into a separat sub that is registered
6333: # with the dispatch hash.
6334: #
6335: # Parameters:
6336: # user_input - The request received from the client (lonc).
6337: # Returns:
6338: # true to keep processing, false if caller should exit.
6339: #
6340: sub process_request {
6341: my ($userinput) = @_; # Easier for now to break style than to
6342: # fix all the userinput -> user_input.
6343: my $wasenc = 0; # True if request was encrypted.
6344: # ------------------------------------------------------------ See if encrypted
6345: # for command
6346: # sethost:<server>
6347: # <command>:<args>
6348: # we just send it to the processor
6349: # for
6350: # sethost:<server>:<command>:<args>
6351: # we do the implict set host and then do the command
6352: if ($userinput =~ /^sethost:/) {
6353: (my $cmd,my $newid,$userinput) = split(':',$userinput,3);
6354: if (defined($userinput)) {
6355: &sethost("$cmd:$newid");
6356: } else {
6357: $userinput = "$cmd:$newid";
6358: }
6359: }
6360:
6361: if ($userinput =~ /^enc/) {
6362: $userinput = decipher($userinput);
6363: $wasenc=1;
6364: if(!$userinput) { # Cipher not defined.
6365: &Failure($client, "error: Encrypted data without negotated key\n");
6366: return 0;
6367: }
6368: }
6369: Debug("process_request: $userinput\n");
6370:
6371: #
6372: # The 'correct way' to add a command to lond is now to
6373: # write a sub to execute it and Add it to the command dispatch
6374: # hash via a call to register_handler.. The comments to that
6375: # sub should give you enough to go on to show how to do this
6376: # along with the examples that are building up as this code
6377: # is getting refactored. Until all branches of the
6378: # if/elseif monster below have been factored out into
6379: # separate procesor subs, if the dispatch hash is missing
6380: # the command keyword, we will fall through to the remainder
6381: # of the if/else chain below in order to keep this thing in
6382: # working order throughout the transmogrification.
6383:
6384: my ($command, $tail) = split(/:/, $userinput, 2);
6385: chomp($command);
6386: chomp($tail);
6387: $tail =~ s/(\r)//; # This helps people debugging with e.g. telnet.
6388: $command =~ s/(\r)//; # And this too for parameterless commands.
6389: if(!$tail) {
6390: $tail =""; # defined but blank.
6391: }
6392:
6393: &Debug("Command received: $command, encoded = $wasenc");
6394:
6395: if(defined $Dispatcher{$command}) {
6396:
6397: my $dispatch_info = $Dispatcher{$command};
6398: my $handler = $$dispatch_info[0];
6399: my $need_encode = $$dispatch_info[1];
6400: my $client_types = $$dispatch_info[2];
6401: Debug("Matched dispatch hash: mustencode: $need_encode "
6402: ."ClientType $client_types");
6403:
6404: # Validate the request:
6405:
6406: my $ok = 1;
6407: my $requesterprivs = 0;
6408: if(&isClient()) {
6409: $requesterprivs |= $CLIENT_OK;
6410: }
6411: if(&isManager()) {
6412: $requesterprivs |= $MANAGER_OK;
6413: }
6414: if($need_encode && (!$wasenc)) {
6415: Debug("Must encode but wasn't: $need_encode $wasenc");
6416: $ok = 0;
6417: }
6418: if(($client_types & $requesterprivs) == 0) {
6419: Debug("Client not privileged to do this operation");
6420: $ok = 0;
6421: }
6422:
6423: if($ok) {
6424: Debug("Dispatching to handler $command $tail");
6425: my $keep_going = &$handler($command, $tail, $client);
6426: return $keep_going;
6427: } else {
6428: Debug("Refusing to dispatch because client did not match requirements");
6429: Failure($client, "refused\n", $userinput);
6430: return 1;
6431: }
6432:
6433: }
6434:
6435: print $client "unknown_cmd\n";
6436: # -------------------------------------------------------------------- complete
6437: Debug("process_request - returning 1");
6438: return 1;
6439: }
6440: #
6441: # Decipher encoded traffic
6442: # Parameters:
6443: # input - Encoded data.
6444: # Returns:
6445: # Decoded data or undef if encryption key was not yet negotiated.
6446: # Implicit input:
6447: # cipher - This global holds the negotiated encryption key.
6448: #
6449: sub decipher {
6450: my ($input) = @_;
6451: my $output = '';
6452:
6453:
6454: if($cipher) {
6455: my($enc, $enclength, $encinput) = split(/:/, $input);
6456: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
6457: $output .=
6458: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
6459: }
6460: return substr($output, 0, $enclength);
6461: } else {
6462: return undef;
6463: }
6464: }
6465:
6466: #
6467: # Register a command processor. This function is invoked to register a sub
6468: # to process a request. Once registered, the ProcessRequest sub can automatically
6469: # dispatch requests to an appropriate sub, and do the top level validity checking
6470: # as well:
6471: # - Is the keyword recognized.
6472: # - Is the proper client type attempting the request.
6473: # - Is the request encrypted if it has to be.
6474: # Parameters:
6475: # $request_name - Name of the request being registered.
6476: # This is the command request that will match
6477: # against the hash keywords to lookup the information
6478: # associated with the dispatch information.
6479: # $procedure - Reference to a sub to call to process the request.
6480: # All subs get called as follows:
6481: # Procedure($cmd, $tail, $replyfd, $key)
6482: # $cmd - the actual keyword that invoked us.
6483: # $tail - the tail of the request that invoked us.
6484: # $replyfd- File descriptor connected to the client
6485: # $must_encode - True if the request must be encoded to be good.
6486: # $client_ok - True if it's ok for a client to request this.
6487: # $manager_ok - True if it's ok for a manager to request this.
6488: # Side effects:
6489: # - On success, the Dispatcher hash has an entry added for the key $RequestName
6490: # - On failure, the program will die as it's a bad internal bug to try to
6491: # register a duplicate command handler.
6492: #
6493: sub register_handler {
6494: my ($request_name,$procedure,$must_encode, $client_ok,$manager_ok) = @_;
6495:
6496: # Don't allow duplication#
6497:
6498: if (defined $Dispatcher{$request_name}) {
6499: die "Attempting to define a duplicate request handler for $request_name\n";
6500: }
6501: # Build the client type mask:
6502:
6503: my $client_type_mask = 0;
6504: if($client_ok) {
6505: $client_type_mask |= $CLIENT_OK;
6506: }
6507: if($manager_ok) {
6508: $client_type_mask |= $MANAGER_OK;
6509: }
6510:
6511: # Enter the hash:
6512:
6513: my @entry = ($procedure, $must_encode, $client_type_mask);
6514:
6515: $Dispatcher{$request_name} = \@entry;
6516:
6517: }
6518:
6519:
6520: #------------------------------------------------------------------
6521:
6522:
6523:
6524:
6525: #
6526: # Convert an error return code from lcpasswd to a string value.
6527: #
6528: sub lcpasswdstrerror {
6529: my $ErrorCode = shift;
6530: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
6531: return "lcpasswd Unrecognized error return value ".$ErrorCode;
6532: } else {
6533: return $passwderrors[$ErrorCode];
6534: }
6535: }
6536:
6537: # grabs exception and records it to log before exiting
6538: sub catchexception {
6539: my ($error)=@_;
6540: $SIG{'QUIT'}='DEFAULT';
6541: $SIG{__DIE__}='DEFAULT';
6542: &status("Catching exception");
6543: &logthis("<font color='red'>CRITICAL: "
6544: ."ABNORMAL EXIT. Child $$ for server ".$perlvar{'lonHostID'}." died through "
6545: ."a crash with this error msg->[$error]</font>");
6546: &logthis('Famous last words: '.$status.' - '.$lastlog);
6547: if ($client) { print $client "error: $error\n"; }
6548: $server->close();
6549: die($error);
6550: }
6551: sub timeout {
6552: &status("Handling Timeout");
6553: &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
6554: &catchexception('Timeout');
6555: }
6556: # -------------------------------- Set signal handlers to record abnormal exits
6557:
6558:
6559: $SIG{'QUIT'}=\&catchexception;
6560: $SIG{__DIE__}=\&catchexception;
6561:
6562: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
6563: &status("Read loncapa.conf and loncapa_apache.conf");
6564: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
6565: %perlvar=%{$perlvarref};
6566: undef $perlvarref;
6567:
6568: # ----------------------------- Make sure this process is running from user=www
6569: my $wwwid=getpwnam('www');
6570: if ($wwwid!=$<) {
6571: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
6572: my $subj="LON: $currenthostid User ID mismatch";
6573: system("echo 'User ID mismatch. lond must be run as user www.' |".
6574: " mail -s '$subj' $emailto > /dev/null");
6575: exit 1;
6576: }
6577:
6578: # --------------------------------------------- Check if other instance running
6579:
6580: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
6581:
6582: if (-e $pidfile) {
6583: my $lfh=IO::File->new("$pidfile");
6584: my $pide=<$lfh>;
6585: chomp($pide);
6586: if (kill 0 => $pide) { die "already running"; }
6587: }
6588:
6589: # ------------------------------------------------------------- Read hosts file
6590:
6591:
6592:
6593: # establish SERVER socket, bind and listen.
6594: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
6595: Type => SOCK_STREAM,
6596: Proto => 'tcp',
6597: ReuseAddr => 1,
6598: Listen => 10 )
6599: or die "making socket: $@\n";
6600:
6601: # --------------------------------------------------------- Do global variables
6602:
6603: # global variables
6604:
6605: my %children = (); # keys are current child process IDs
6606:
6607: sub REAPER { # takes care of dead children
6608: $SIG{CHLD} = \&REAPER;
6609: &status("Handling child death");
6610: my $pid;
6611: do {
6612: $pid = waitpid(-1,&WNOHANG());
6613: if (defined($children{$pid})) {
6614: &logthis("Child $pid died");
6615: delete($children{$pid});
6616: } elsif ($pid > 0) {
6617: &logthis("Unknown Child $pid died");
6618: }
6619: } while ( $pid > 0 );
6620: foreach my $child (keys(%children)) {
6621: $pid = waitpid($child,&WNOHANG());
6622: if ($pid > 0) {
6623: &logthis("Child $child - $pid looks like we missed it's death");
6624: delete($children{$pid});
6625: }
6626: }
6627: &status("Finished Handling child death");
6628: }
6629:
6630: sub HUNTSMAN { # signal handler for SIGINT
6631: &status("Killing children (INT)");
6632: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
6633: kill 'INT' => keys %children;
6634: &logthis("Free socket: ".shutdown($server,2)); # free up socket
6635: my $execdir=$perlvar{'lonDaemons'};
6636: unlink("$execdir/logs/lond.pid");
6637: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
6638: &status("Done killing children");
6639: exit; # clean up with dignity
6640: }
6641:
6642: sub HUPSMAN { # signal handler for SIGHUP
6643: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
6644: &status("Killing children for restart (HUP)");
6645: kill 'INT' => keys %children;
6646: &logthis("Free socket: ".shutdown($server,2)); # free up socket
6647: &logthis("<font color='red'>CRITICAL: Restarting</font>");
6648: my $execdir=$perlvar{'lonDaemons'};
6649: unlink("$execdir/logs/lond.pid");
6650: &status("Restarting self (HUP)");
6651: exec("$execdir/lond"); # here we go again
6652: }
6653:
6654: #
6655: # Reload the Apache daemon's state.
6656: # This is done by invoking /home/httpd/perl/apachereload
6657: # a setuid perl script that can be root for us to do this job.
6658: #
6659: sub ReloadApache {
6660: # --------------------------- Handle case of another apachereload process (locking)
6661: if (&LONCAPA::try_to_lock('/tmp/lock_apachereload')) {
6662: my $execdir = $perlvar{'lonDaemons'};
6663: my $script = $execdir."/apachereload";
6664: system($script);
6665: unlink('/tmp/lock_apachereload'); # Remove the lock file.
6666: }
6667: }
6668:
6669: #
6670: # Called in response to a USR2 signal.
6671: # - Reread hosts.tab
6672: # - All children connected to hosts that were removed from hosts.tab
6673: # are killed via SIGINT
6674: # - All children connected to previously existing hosts are sent SIGUSR1
6675: # - Our internal hosts hash is updated to reflect the new contents of
6676: # hosts.tab causing connections from hosts added to hosts.tab to
6677: # now be honored.
6678: #
6679: sub UpdateHosts {
6680: &status("Reload hosts.tab");
6681: logthis('<font color="blue"> Updating connections </font>');
6682: #
6683: # The %children hash has the set of IP's we currently have children
6684: # on. These need to be matched against records in the hosts.tab
6685: # Any ip's no longer in the table get killed off they correspond to
6686: # either dropped or changed hosts. Note that the re-read of the table
6687: # will take care of new and changed hosts as connections come into being.
6688:
6689: &Apache::lonnet::reset_hosts_info();
6690:
6691: foreach my $child (keys(%children)) {
6692: my $childip = $children{$child};
6693: if ($childip ne '127.0.0.1'
6694: && !defined(&Apache::lonnet::get_hosts_from_ip($childip))) {
6695: logthis('<font color="blue"> UpdateHosts killing child '
6696: ." $child for ip $childip </font>");
6697: kill('INT', $child);
6698: } else {
6699: logthis('<font color="green"> keeping child for ip '
6700: ." $childip (pid=$child) </font>");
6701: }
6702: }
6703: ReloadApache;
6704: &status("Finished reloading hosts.tab");
6705: }
6706:
6707:
6708: sub checkchildren {
6709: &status("Checking on the children (sending signals)");
6710: &initnewstatus();
6711: &logstatus();
6712: &logthis('Going to check on the children');
6713: my $docdir=$perlvar{'lonDocRoot'};
6714: foreach (sort keys %children) {
6715: #sleep 1;
6716: unless (kill 'USR1' => $_) {
6717: &logthis ('Child '.$_.' is dead');
6718: &logstatus($$.' is dead');
6719: delete($children{$_});
6720: }
6721: }
6722: sleep 5;
6723: $SIG{ALRM} = sub { Debug("timeout");
6724: die "timeout"; };
6725: $SIG{__DIE__} = 'DEFAULT';
6726: &status("Checking on the children (waiting for reports)");
6727: foreach (sort keys %children) {
6728: unless (-e "$docdir/lon-status/londchld/$_.txt") {
6729: eval {
6730: alarm(300);
6731: &logthis('Child '.$_.' did not respond');
6732: kill 9 => $_;
6733: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
6734: #$subj="LON: $currenthostid killed lond process $_";
6735: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
6736: #$execdir=$perlvar{'lonDaemons'};
6737: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
6738: delete($children{$_});
6739: alarm(0);
6740: }
6741: }
6742: }
6743: $SIG{ALRM} = 'DEFAULT';
6744: $SIG{__DIE__} = \&catchexception;
6745: &status("Finished checking children");
6746: &logthis('Finished Checking children');
6747: }
6748:
6749: # --------------------------------------------------------------------- Logging
6750:
6751: sub logthis {
6752: my $message=shift;
6753: my $execdir=$perlvar{'lonDaemons'};
6754: my $fh=IO::File->new(">>$execdir/logs/lond.log");
6755: my $now=time;
6756: my $local=localtime($now);
6757: $lastlog=$local.': '.$message;
6758: print $fh "$local ($$): $message\n";
6759: }
6760:
6761: # ------------------------- Conditional log if $DEBUG true.
6762: sub Debug {
6763: my $message = shift;
6764: if($DEBUG) {
6765: &logthis($message);
6766: }
6767: }
6768:
6769: #
6770: # Sub to do replies to client.. this gives a hook for some
6771: # debug tracing too:
6772: # Parameters:
6773: # fd - File open on client.
6774: # reply - Text to send to client.
6775: # request - Original request from client.
6776: #
6777: sub Reply {
6778: my ($fd, $reply, $request) = @_;
6779: if (ref($reply)) {
6780: print $fd $$reply;
6781: print $fd "\n";
6782: if ($DEBUG) { Debug("Request was $request Reply was $$reply"); }
6783: } else {
6784: print $fd $reply;
6785: if ($DEBUG) { Debug("Request was $request Reply was $reply"); }
6786: }
6787: $Transactions++;
6788: }
6789:
6790:
6791: #
6792: # Sub to report a failure.
6793: # This function:
6794: # - Increments the failure statistic counters.
6795: # - Invokes Reply to send the error message to the client.
6796: # Parameters:
6797: # fd - File descriptor open on the client
6798: # reply - Reply text to emit.
6799: # request - The original request message (used by Reply
6800: # to debug if that's enabled.
6801: # Implicit outputs:
6802: # $Failures- The number of failures is incremented.
6803: # Reply (invoked here) sends a message to the
6804: # client:
6805: #
6806: sub Failure {
6807: my $fd = shift;
6808: my $reply = shift;
6809: my $request = shift;
6810:
6811: $Failures++;
6812: Reply($fd, $reply, $request); # That's simple eh?
6813: }
6814: # ------------------------------------------------------------------ Log status
6815:
6816: sub logstatus {
6817: &status("Doing logging");
6818: my $docdir=$perlvar{'lonDocRoot'};
6819: {
6820: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
6821: print $fh $status."\n".$lastlog."\n".time."\n$keymode";
6822: $fh->close();
6823: }
6824: &status("Finished $$.txt");
6825: {
6826: open(LOG,">>$docdir/lon-status/londstatus.txt");
6827: flock(LOG,LOCK_EX);
6828: print LOG $$."\t".$clientname."\t".$currenthostid."\t"
6829: .$status."\t".$lastlog."\t $keymode\n";
6830: flock(LOG,LOCK_UN);
6831: close(LOG);
6832: }
6833: &status("Finished logging");
6834: }
6835:
6836: sub initnewstatus {
6837: my $docdir=$perlvar{'lonDocRoot'};
6838: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
6839: my $now=time();
6840: my $local=localtime($now);
6841: print $fh "LOND status $local - parent $$\n\n";
6842: opendir(DIR,"$docdir/lon-status/londchld");
6843: while (my $filename=readdir(DIR)) {
6844: unlink("$docdir/lon-status/londchld/$filename");
6845: }
6846: closedir(DIR);
6847: }
6848:
6849: # -------------------------------------------------------------- Status setting
6850:
6851: sub status {
6852: my $what=shift;
6853: my $now=time;
6854: my $local=localtime($now);
6855: $status=$local.': '.$what;
6856: $0='lond: '.$what.' '.$local;
6857: }
6858:
6859: # -------------------------------------------------------------- Talk to lonsql
6860:
6861: sub sql_reply {
6862: my ($cmd)=@_;
6863: my $answer=&sub_sql_reply($cmd);
6864: if ($answer eq 'con_lost') { $answer=&sub_sql_reply($cmd); }
6865: return $answer;
6866: }
6867:
6868: sub sub_sql_reply {
6869: my ($cmd)=@_;
6870: my $unixsock="mysqlsock";
6871: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
6872: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
6873: Type => SOCK_STREAM,
6874: Timeout => 10)
6875: or return "con_lost";
6876: print $sclient "$cmd:$currentdomainid\n";
6877: my $answer=<$sclient>;
6878: chomp($answer);
6879: if (!$answer) { $answer="con_lost"; }
6880: return $answer;
6881: }
6882:
6883: # --------------------------------------- Is this the home server of an author?
6884:
6885: sub ishome {
6886: my $author=shift;
6887: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
6888: my ($udom,$uname)=split(/\//,$author);
6889: my $proname=propath($udom,$uname);
6890: if (-e $proname) {
6891: return 'owner';
6892: } else {
6893: return 'not_owner';
6894: }
6895: }
6896:
6897: # ======================================================= Continue main program
6898: # ---------------------------------------------------- Fork once and dissociate
6899:
6900: my $fpid=fork;
6901: exit if $fpid;
6902: die "Couldn't fork: $!" unless defined ($fpid);
6903:
6904: POSIX::setsid() or die "Can't start new session: $!";
6905:
6906: # ------------------------------------------------------- Write our PID on disk
6907:
6908: my $execdir=$perlvar{'lonDaemons'};
6909: open (PIDSAVE,">$execdir/logs/lond.pid");
6910: print PIDSAVE "$$\n";
6911: close(PIDSAVE);
6912: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
6913: &status('Starting');
6914:
6915:
6916:
6917: # ----------------------------------------------------- Install signal handlers
6918:
6919:
6920: $SIG{CHLD} = \&REAPER;
6921: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
6922: $SIG{HUP} = \&HUPSMAN;
6923: $SIG{USR1} = \&checkchildren;
6924: $SIG{USR2} = \&UpdateHosts;
6925:
6926: # Read the host hashes:
6927: &Apache::lonnet::load_hosts_tab();
6928: my %iphost = &Apache::lonnet::get_iphost(1);
6929:
6930: $dist=`$perlvar{'lonDaemons'}/distprobe`;
6931:
6932: my $arch = `uname -i`;
6933: chomp($arch);
6934: if ($arch eq 'unknown') {
6935: $arch = `uname -m`;
6936: chomp($arch);
6937: }
6938:
6939: # --------------------------------------------------------------
6940: # Accept connections. When a connection comes in, it is validated
6941: # and if good, a child process is created to process transactions
6942: # along the connection.
6943:
6944: while (1) {
6945: &status('Starting accept');
6946: $client = $server->accept() or next;
6947: &status('Accepted '.$client.' off to spawn');
6948: make_new_child($client);
6949: &status('Finished spawning');
6950: }
6951:
6952: sub make_new_child {
6953: my $pid;
6954: # my $cipher; # Now global
6955: my $sigset;
6956:
6957: $client = shift;
6958: &status('Starting new child '.$client);
6959: &logthis('<font color="green"> Attempting to start child ('.$client.
6960: ")</font>");
6961: # block signal for fork
6962: $sigset = POSIX::SigSet->new(SIGINT);
6963: sigprocmask(SIG_BLOCK, $sigset)
6964: or die "Can't block SIGINT for fork: $!\n";
6965:
6966: die "fork: $!" unless defined ($pid = fork);
6967:
6968: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
6969: # connection liveness.
6970:
6971: #
6972: # Figure out who we're talking to so we can record the peer in
6973: # the pid hash.
6974: #
6975: my $caller = getpeername($client);
6976: my ($port,$iaddr);
6977: if (defined($caller) && length($caller) > 0) {
6978: ($port,$iaddr)=unpack_sockaddr_in($caller);
6979: } else {
6980: &logthis("Unable to determine who caller was, getpeername returned nothing");
6981: }
6982: if (defined($iaddr)) {
6983: $clientip = inet_ntoa($iaddr);
6984: Debug("Connected with $clientip");
6985: } else {
6986: &logthis("Unable to determine clientip");
6987: $clientip='Unavailable';
6988: }
6989:
6990: if ($pid) {
6991: # Parent records the child's birth and returns.
6992: sigprocmask(SIG_UNBLOCK, $sigset)
6993: or die "Can't unblock SIGINT for fork: $!\n";
6994: $children{$pid} = $clientip;
6995: &status('Started child '.$pid);
6996: close($client);
6997: return;
6998: } else {
6999: # Child can *not* return from this subroutine.
7000: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
7001: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
7002: #don't get intercepted
7003: $SIG{USR1}= \&logstatus;
7004: $SIG{ALRM}= \&timeout;
7005: #
7006: # Block sigpipe as it gets thrownon socket disconnect and we want to
7007: # deal with that as a read faiure instead.
7008: #
7009: my $blockset = POSIX::SigSet->new(SIGPIPE);
7010: sigprocmask(SIG_BLOCK, $blockset);
7011:
7012: $lastlog='Forked ';
7013: $status='Forked';
7014:
7015: # unblock signals
7016: sigprocmask(SIG_UNBLOCK, $sigset)
7017: or die "Can't unblock SIGINT for fork: $!\n";
7018:
7019: # my $tmpsnum=0; # Now global
7020: #---------------------------------------------------- kerberos 5 initialization
7021: &Authen::Krb5::init_context();
7022:
7023: my $no_ets;
7024: if ($dist =~ /^(?:centos|rhes|scientific|oracle)(\d+)$/) {
7025: if ($1 >= 7) {
7026: $no_ets = 1;
7027: }
7028: } elsif ($dist =~ /^suse(\d+\.\d+)$/) {
7029: if (($1 eq '9.3') || ($1 >= 12.2)) {
7030: $no_ets = 1;
7031: }
7032: } elsif ($dist =~ /^sles(\d+)$/) {
7033: if ($1 > 11) {
7034: $no_ets = 1;
7035: }
7036: } elsif ($dist =~ /^fedora(\d+)$/) {
7037: if ($1 < 7) {
7038: $no_ets = 1;
7039: }
7040: }
7041: unless ($no_ets) {
7042: &Authen::Krb5::init_ets();
7043: }
7044:
7045: &status('Accepted connection');
7046: # =============================================================================
7047: # do something with the connection
7048: # -----------------------------------------------------------------------------
7049: # see if we know client and 'check' for spoof IP by ineffective challenge
7050:
7051: my $outsideip=$clientip;
7052: if ($clientip eq '127.0.0.1') {
7053: $outsideip=&Apache::lonnet::get_host_ip($perlvar{'lonHostID'});
7054: }
7055: &ReadManagerTable();
7056: my $clientrec=defined(&Apache::lonnet::get_hosts_from_ip($outsideip));
7057: my $ismanager=($managers{$outsideip} ne undef);
7058: $clientname = "[unknown]";
7059: if($clientrec) { # Establish client type.
7060: $ConnectionType = "client";
7061: $clientname = (&Apache::lonnet::get_hosts_from_ip($outsideip))[-1];
7062: if($ismanager) {
7063: $ConnectionType = "both";
7064: }
7065: } else {
7066: $ConnectionType = "manager";
7067: $clientname = $managers{$outsideip};
7068: }
7069: my $clientok;
7070:
7071: if ($clientrec || $ismanager) {
7072: &status("Waiting for init from $clientip $clientname");
7073: &logthis('<font color="yellow">INFO: Connection, '.
7074: $clientip.
7075: " ($clientname) connection type = $ConnectionType </font>" );
7076: &status("Connecting $clientip ($clientname))");
7077: my $remotereq=<$client>;
7078: chomp($remotereq);
7079: Debug("Got init: $remotereq");
7080:
7081: if ($remotereq =~ /^init/) {
7082: &sethost("sethost:$perlvar{'lonHostID'}");
7083: #
7084: # If the remote is attempting a local init... give that a try:
7085: #
7086: (my $i, my $inittype, $clientversion) = split(/:/, $remotereq);
7087: # For LON-CAPA 2.9, the client session will have sent its LON-CAPA
7088: # version when initiating the connection. For LON-CAPA 2.8 and older,
7089: # the version is retrieved from the global %loncaparevs in lonnet.pm.
7090: # $clientversion contains path to keyfile if $inittype eq 'local'
7091: # it's overridden below in this case
7092: $clientversion ||= $Apache::lonnet::loncaparevs{$clientname};
7093:
7094: # If the connection type is ssl, but I didn't get my
7095: # certificate files yet, then I'll drop back to
7096: # insecure (if allowed).
7097:
7098: if($inittype eq "ssl") {
7099: my ($ca, $cert) = lonssl::CertificateFile;
7100: my $kfile = lonssl::KeyFile;
7101: if((!$ca) ||
7102: (!$cert) ||
7103: (!$kfile)) {
7104: $inittype = ""; # This forces insecure attempt.
7105: &logthis("<font color=\"blue\"> Certificates not "
7106: ."installed -- trying insecure auth</font>");
7107: } else { # SSL certificates are in place so
7108: } # Leave the inittype alone.
7109: }
7110:
7111: if($inittype eq "local") {
7112: $clientversion = $perlvar{'lonVersion'};
7113: my $key = LocalConnection($client, $remotereq);
7114: if($key) {
7115: Debug("Got local key $key");
7116: $clientok = 1;
7117: my $cipherkey = pack("H32", $key);
7118: $cipher = new IDEA($cipherkey);
7119: print $client "ok:local\n";
7120: &logthis('<font color="green">'
7121: . "Successful local authentication </font>");
7122: $keymode = "local"
7123: } else {
7124: Debug("Failed to get local key");
7125: $clientok = 0;
7126: shutdown($client, 3);
7127: close $client;
7128: }
7129: } elsif ($inittype eq "ssl") {
7130: my $key = SSLConnection($client);
7131: if ($key) {
7132: $clientok = 1;
7133: my $cipherkey = pack("H32", $key);
7134: $cipher = new IDEA($cipherkey);
7135: &logthis('<font color="green">'
7136: ."Successfull ssl authentication with $clientname </font>");
7137: $keymode = "ssl";
7138:
7139: } else {
7140: $clientok = 0;
7141: close $client;
7142: }
7143:
7144: } else {
7145: my $ok = InsecureConnection($client);
7146: if($ok) {
7147: $clientok = 1;
7148: &logthis('<font color="green">'
7149: ."Successful insecure authentication with $clientname </font>");
7150: print $client "ok\n";
7151: $keymode = "insecure";
7152: } else {
7153: &logthis('<font color="yellow">'
7154: ."Attempted insecure connection disallowed </font>");
7155: close $client;
7156: $clientok = 0;
7157: }
7158: }
7159: } else {
7160: &logthis(
7161: "<font color='blue'>WARNING: "
7162: ."$clientip failed to initialize: >$remotereq< </font>");
7163: &status('No init '.$clientip);
7164: }
7165: } else {
7166: &logthis(
7167: "<font color='blue'>WARNING: Unknown client $clientip</font>");
7168: &status('Hung up on '.$clientip);
7169: }
7170:
7171: if ($clientok) {
7172: # ---------------- New known client connecting, could mean machine online again
7173: if (&Apache::lonnet::get_host_ip($currenthostid) ne $clientip
7174: && $clientip ne '127.0.0.1') {
7175: &Apache::lonnet::reconlonc($clientname);
7176: }
7177: &logthis("<font color='green'>Established connection: $clientname</font>");
7178: &status('Will listen to '.$clientname);
7179: # ------------------------------------------------------------ Process requests
7180: my $keep_going = 1;
7181: my $user_input;
7182: my $clienthost = &Apache::lonnet::hostname($clientname);
7183: my $clientserverhomeID = &Apache::lonnet::get_server_homeID($clienthost);
7184: $clienthomedom = &Apache::lonnet::host_domain($clientserverhomeID);
7185: while(($user_input = get_request) && $keep_going) {
7186: alarm(120);
7187: Debug("Main: Got $user_input\n");
7188: $keep_going = &process_request($user_input);
7189: alarm(0);
7190: &status('Listening to '.$clientname." ($keymode)");
7191: }
7192:
7193: # --------------------------------------------- client unknown or fishy, refuse
7194: } else {
7195: print $client "refused\n";
7196: $client->close();
7197: &logthis("<font color='blue'>WARNING: "
7198: ."Rejected client $clientip, closing connection</font>");
7199: }
7200: }
7201:
7202: # =============================================================================
7203:
7204: &logthis("<font color='red'>CRITICAL: "
7205: ."Disconnect from $clientip ($clientname)</font>");
7206:
7207:
7208: # this exit is VERY important, otherwise the child will become
7209: # a producer of more and more children, forking yourself into
7210: # process death.
7211: exit;
7212:
7213: }
7214: #
7215: # Determine if a user is an author for the indicated domain.
7216: #
7217: # Parameters:
7218: # domain - domain to check in .
7219: # user - Name of user to check.
7220: #
7221: # Return:
7222: # 1 - User is an author for domain.
7223: # 0 - User is not an author for domain.
7224: sub is_author {
7225: my ($domain, $user) = @_;
7226:
7227: &Debug("is_author: $user @ $domain");
7228:
7229: my $hashref = &tie_user_hash($domain, $user, "roles",
7230: &GDBM_READER());
7231:
7232: # Author role should show up as a key /domain/_au
7233:
7234: my $value;
7235: if ($hashref) {
7236:
7237: my $key = "/$domain/_au";
7238: if (defined($hashref)) {
7239: $value = $hashref->{$key};
7240: if(!untie_user_hash($hashref)) {
7241: return 'error: ' . ($!+0)." untie (GDBM) Failed";
7242: }
7243: }
7244:
7245: if(defined($value)) {
7246: &Debug("$user @ $domain is an author");
7247: }
7248: } else {
7249: return 'error: '.($!+0)." tie (GDBM) Failed";
7250: }
7251:
7252: return defined($value);
7253: }
7254: #
7255: # Checks to see if the input roleput request was to set
7256: # an author role. If so, creates construction space
7257: # Parameters:
7258: # request - The request sent to the rolesput subchunk.
7259: # We're looking for /domain/_au
7260: # domain - The domain in which the user is having roles doctored.
7261: # user - Name of the user for which the role is being put.
7262: # authtype - The authentication type associated with the user.
7263: #
7264: sub manage_permissions {
7265: my ($request, $domain, $user, $authtype) = @_;
7266: # See if the request is of the form /$domain/_au
7267: if($request =~ /^(\/\Q$domain\E\/_au)$/) { # It's an author rolesput...
7268: my $path=$perlvar{'lonDocRoot'}."/priv/$domain";
7269: unless (-e $path) {
7270: mkdir($path);
7271: }
7272: unless (-e $path.'/'.$user) {
7273: mkdir($path.'/'.$user);
7274: }
7275: }
7276: }
7277:
7278:
7279: #
7280: # Return the full path of a user password file, whether it exists or not.
7281: # Parameters:
7282: # domain - Domain in which the password file lives.
7283: # user - name of the user.
7284: # Returns:
7285: # Full passwd path:
7286: #
7287: sub password_path {
7288: my ($domain, $user) = @_;
7289: return &propath($domain, $user).'/passwd';
7290: }
7291:
7292: # Password Filename
7293: # Returns the path to a passwd file given domain and user... only if
7294: # it exists.
7295: # Parameters:
7296: # domain - Domain in which to search.
7297: # user - username.
7298: # Returns:
7299: # - If the password file exists returns its path.
7300: # - If the password file does not exist, returns undefined.
7301: #
7302: sub password_filename {
7303: my ($domain, $user) = @_;
7304:
7305: Debug ("PasswordFilename called: dom = $domain user = $user");
7306:
7307: my $path = &password_path($domain, $user);
7308: Debug("PasswordFilename got path: $path");
7309: if(-e $path) {
7310: return $path;
7311: } else {
7312: return undef;
7313: }
7314: }
7315:
7316: #
7317: # Rewrite the contents of the user's passwd file.
7318: # Parameters:
7319: # domain - domain of the user.
7320: # name - User's name.
7321: # contents - New contents of the file.
7322: # saveold - (optional). If true save old file in a passwd.bak file.
7323: # Returns:
7324: # 0 - Failed.
7325: # 1 - Success.
7326: #
7327: sub rewrite_password_file {
7328: my ($domain, $user, $contents, $saveold) = @_;
7329:
7330: my $file = &password_filename($domain, $user);
7331: if (defined $file) {
7332: if ($saveold) {
7333: my $bakfile = $file.'.bak';
7334: if (CopyFile($file,$bakfile)) {
7335: chmod(0400,$bakfile);
7336: &logthis("Old password saved in passwd.bak for internally authenticated user: $user:$domain");
7337: } else {
7338: &logthis("Failed to save old password in passwd.bak for internally authenticated user: $user:$domain");
7339: }
7340: }
7341: my $pf = IO::File->new(">$file");
7342: if($pf) {
7343: print $pf "$contents\n";
7344: return 1;
7345: } else {
7346: return 0;
7347: }
7348: } else {
7349: return 0;
7350: }
7351:
7352: }
7353:
7354: #
7355: # get_auth_type - Determines the authorization type of a user in a domain.
7356:
7357: # Returns the authorization type or nouser if there is no such user.
7358: #
7359: sub get_auth_type {
7360: my ($domain, $user) = @_;
7361:
7362: Debug("get_auth_type( $domain, $user ) \n");
7363: my $proname = &propath($domain, $user);
7364: my $passwdfile = "$proname/passwd";
7365: if( -e $passwdfile ) {
7366: my $pf = IO::File->new($passwdfile);
7367: my $realpassword = <$pf>;
7368: chomp($realpassword);
7369: Debug("Password info = $realpassword\n");
7370: my ($authtype, $contentpwd) = split(/:/, $realpassword);
7371: Debug("Authtype = $authtype, content = $contentpwd\n");
7372: return "$authtype:$contentpwd";
7373: } else {
7374: Debug("Returning nouser");
7375: return "nouser";
7376: }
7377: }
7378:
7379: #
7380: # Validate a user given their domain, name and password. This utility
7381: # function is used by both AuthenticateHandler and ChangePasswordHandler
7382: # to validate the login credentials of a user.
7383: # Parameters:
7384: # $domain - The domain being logged into (this is required due to
7385: # the capability for multihomed systems.
7386: # $user - The name of the user being validated.
7387: # $password - The user's propoposed password.
7388: #
7389: # Returns:
7390: # 1 - The domain,user,pasword triplet corresponds to a valid
7391: # user.
7392: # 0 - The domain,user,password triplet is not a valid user.
7393: #
7394: sub validate_user {
7395: my ($domain, $user, $password, $checkdefauth) = @_;
7396:
7397: # Why negative ~pi you may well ask? Well this function is about
7398: # authentication, and therefore very important to get right.
7399: # I've initialized the flag that determines whether or not I've
7400: # validated correctly to a value it's not supposed to get.
7401: # At the end of this function. I'll ensure that it's not still that
7402: # value so we don't just wind up returning some accidental value
7403: # as a result of executing an unforseen code path that
7404: # did not set $validated. At the end of valid execution paths,
7405: # validated shoule be 1 for success or 0 for failuer.
7406:
7407: my $validated = -3.14159;
7408:
7409: # How we authenticate is determined by the type of authentication
7410: # the user has been assigned. If the authentication type is
7411: # "nouser", the user does not exist so we will return 0.
7412:
7413: my $contents = &get_auth_type($domain, $user);
7414: my ($howpwd, $contentpwd) = split(/:/, $contents);
7415:
7416: my $null = pack("C",0); # Used by kerberos auth types.
7417:
7418: if ($howpwd eq 'nouser') {
7419: if ($checkdefauth) {
7420: my %domdefaults = &Apache::lonnet::get_domain_defaults($domain);
7421: if ($domdefaults{'auth_def'} eq 'localauth') {
7422: $howpwd = $domdefaults{'auth_def'};
7423: $contentpwd = $domdefaults{'auth_arg_def'};
7424: } elsif ((($domdefaults{'auth_def'} eq 'krb4') ||
7425: ($domdefaults{'auth_def'} eq 'krb5')) &&
7426: ($domdefaults{'auth_arg_def'} ne '')) {
7427: $howpwd = $domdefaults{'auth_def'};
7428: $contentpwd = $domdefaults{'auth_arg_def'};
7429: }
7430: }
7431: }
7432: if ($howpwd ne 'nouser') {
7433: if($howpwd eq "internal") { # Encrypted is in local password file.
7434: if (length($contentpwd) == 13) {
7435: $validated = (crypt($password,$contentpwd) eq $contentpwd);
7436: if ($validated) {
7437: my %domdefaults = &Apache::lonnet::get_domain_defaults($domain);
7438: if ($domdefaults{'intauth_switch'}) {
7439: my $ncpass = &hash_passwd($domain,$password);
7440: my $saveold;
7441: if ($domdefaults{'intauth_switch'} == 2) {
7442: $saveold = 1;
7443: }
7444: if (&rewrite_password_file($domain,$user,"$howpwd:$ncpass",$saveold)) {
7445: &update_passwd_history($user,$domain,$howpwd,'conversion');
7446: &logthis("Validated password hashed with bcrypt for $user:$domain");
7447: }
7448: }
7449: }
7450: } else {
7451: $validated = &check_internal_passwd($password,$contentpwd,$domain,$user);
7452: }
7453: }
7454: elsif ($howpwd eq "unix") { # User is a normal unix user.
7455: $contentpwd = (getpwnam($user))[1];
7456: if($contentpwd) {
7457: if($contentpwd eq 'x') { # Shadow password file...
7458: my $pwauth_path = "/usr/local/sbin/pwauth";
7459: open PWAUTH, "|$pwauth_path" or
7460: die "Cannot invoke authentication";
7461: print PWAUTH "$user\n$password\n";
7462: close PWAUTH;
7463: $validated = ! $?;
7464:
7465: } else { # Passwords in /etc/passwd.
7466: $validated = (crypt($password,
7467: $contentpwd) eq $contentpwd);
7468: }
7469: } else {
7470: $validated = 0;
7471: }
7472: } elsif ($howpwd eq "krb4") { # user is in kerberos 4 auth. domain.
7473: my $checkwithkrb5 = 0;
7474: if ($dist =~/^fedora(\d+)$/) {
7475: if ($1 > 11) {
7476: $checkwithkrb5 = 1;
7477: }
7478: } elsif ($dist =~ /^suse([\d.]+)$/) {
7479: if ($1 > 11.1) {
7480: $checkwithkrb5 = 1;
7481: }
7482: }
7483: if ($checkwithkrb5) {
7484: $validated = &krb5_authen($password,$null,$user,$contentpwd);
7485: } else {
7486: $validated = &krb4_authen($password,$null,$user,$contentpwd);
7487: }
7488: } elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain.
7489: $validated = &krb5_authen($password,$null,$user,$contentpwd);
7490: } elsif ($howpwd eq "localauth") {
7491: # Authenticate via installation specific authentcation method:
7492: $validated = &localauth::localauth($user,
7493: $password,
7494: $contentpwd,
7495: $domain);
7496: if ($validated < 0) {
7497: &logthis("localauth for $contentpwd $user:$domain returned a $validated");
7498: $validated = 0;
7499: }
7500: } else { # Unrecognized auth is also bad.
7501: $validated = 0;
7502: }
7503: } else {
7504: $validated = 0;
7505: }
7506: #
7507: # $validated has the correct stat of the authentication:
7508: #
7509:
7510: unless ($validated != -3.14159) {
7511: # I >really really< want to know if this happens.
7512: # since it indicates that user authentication is badly
7513: # broken in some code path.
7514: #
7515: die "ValidateUser - failed to set the value of validated $domain, $user $password";
7516: }
7517: return $validated;
7518: }
7519:
7520: sub check_internal_passwd {
7521: my ($plainpass,$stored,$domain,$user) = @_;
7522: my (undef,$method,@rest) = split(/!/,$stored);
7523: if ($method eq 'bcrypt') {
7524: my $result = &hash_passwd($domain,$plainpass,@rest);
7525: if ($result ne $stored) {
7526: return 0;
7527: }
7528: my %domdefaults = &Apache::lonnet::get_domain_defaults($domain);
7529: if ($domdefaults{'intauth_check'}) {
7530: # Upgrade to a larger number of rounds if necessary
7531: my $defaultcost = $domdefaults{'intauth_cost'};
7532: if (($defaultcost eq '') || ($defaultcost =~ /D/)) {
7533: $defaultcost = 10;
7534: }
7535: if (int($rest[0])<int($defaultcost)) {
7536: if ($domdefaults{'intauth_check'} == 1) {
7537: my $ncpass = &hash_passwd($domain,$plainpass);
7538: if (&rewrite_password_file($domain,$user,"internal:$ncpass")) {
7539: &update_passwd_history($user,$domain,'internal','update cost');
7540: &logthis("Validated password hashed with bcrypt for $user:$domain");
7541: }
7542: return 1;
7543: } elsif ($domdefaults{'intauth_check'} == 2) {
7544: return 0;
7545: }
7546: }
7547: } else {
7548: return 1;
7549: }
7550: }
7551: return 0;
7552: }
7553:
7554: sub get_last_authchg {
7555: my ($domain,$user) = @_;
7556: my $lastmod;
7557: my $logname = &propath($domain,$user).'/passwd.log';
7558: if (-e "$logname") {
7559: $lastmod = (stat("$logname"))[9];
7560: }
7561: return $lastmod;
7562: }
7563:
7564: sub krb4_authen {
7565: my ($password,$null,$user,$contentpwd) = @_;
7566: my $validated = 0;
7567: if (!($password =~ /$null/) ) { # Null password not allowed.
7568: eval {
7569: require Authen::Krb4;
7570: };
7571: if (!$@) {
7572: my $k4error = &Authen::Krb4::get_pw_in_tkt($user,
7573: "",
7574: $contentpwd,,
7575: 'krbtgt',
7576: $contentpwd,
7577: 1,
7578: $password);
7579: if(!$k4error) {
7580: $validated = 1;
7581: } else {
7582: $validated = 0;
7583: &logthis('krb4: '.$user.', '.$contentpwd.', '.
7584: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
7585: }
7586: } else {
7587: $validated = krb5_authen($password,$null,$user,$contentpwd);
7588: }
7589: }
7590: return $validated;
7591: }
7592:
7593: sub krb5_authen {
7594: my ($password,$null,$user,$contentpwd) = @_;
7595: my $validated = 0;
7596: if(!($password =~ /$null/)) { # Null password not allowed.
7597: my $krbclient = &Authen::Krb5::parse_name($user.'@'
7598: .$contentpwd);
7599: my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd;
7600: my $krbserver = &Authen::Krb5::parse_name($krbservice);
7601: my $credentials= &Authen::Krb5::cc_default();
7602: $credentials->initialize(&Authen::Krb5::parse_name($user.'@'
7603: .$contentpwd));
7604: my $krbreturn;
7605: if (exists(&Authen::Krb5::get_init_creds_password)) {
7606: $krbreturn =
7607: &Authen::Krb5::get_init_creds_password($krbclient,$password,
7608: $krbservice);
7609: $validated = (ref($krbreturn) eq 'Authen::Krb5::Creds');
7610: } else {
7611: $krbreturn =
7612: &Authen::Krb5::get_in_tkt_with_password($krbclient,$krbserver,
7613: $password,$credentials);
7614: $validated = ($krbreturn == 1);
7615: }
7616: if (!$validated) {
7617: &logthis('krb5: '.$user.', '.$contentpwd.', '.
7618: &Authen::Krb5::error());
7619: }
7620: }
7621: return $validated;
7622: }
7623:
7624: sub addline {
7625: my ($fname,$hostid,$ip,$newline)=@_;
7626: my $contents;
7627: my $found=0;
7628: my $expr='^'.quotemeta($hostid).':'.quotemeta($ip).':';
7629: my $sh;
7630: if ($sh=IO::File->new("$fname.subscription")) {
7631: while (my $subline=<$sh>) {
7632: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
7633: }
7634: $sh->close();
7635: }
7636: $sh=IO::File->new(">$fname.subscription");
7637: if ($contents) { print $sh $contents; }
7638: if ($newline) { print $sh $newline; }
7639: $sh->close();
7640: return $found;
7641: }
7642:
7643: sub get_chat {
7644: my ($cdom,$cname,$udom,$uname,$group)=@_;
7645:
7646: my @entries=();
7647: my $namespace = 'nohist_chatroom';
7648: my $namespace_inroom = 'nohist_inchatroom';
7649: if ($group ne '') {
7650: $namespace .= '_'.$group;
7651: $namespace_inroom .= '_'.$group;
7652: }
7653: my $hashref = &tie_user_hash($cdom, $cname, $namespace,
7654: &GDBM_READER());
7655: if ($hashref) {
7656: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
7657: &untie_user_hash($hashref);
7658: }
7659: my @participants=();
7660: my $cutoff=time-60;
7661: $hashref = &tie_user_hash($cdom, $cname, $namespace_inroom,
7662: &GDBM_WRCREAT());
7663: if ($hashref) {
7664: $hashref->{$uname.':'.$udom}=time;
7665: foreach my $user (sort(keys(%$hashref))) {
7666: if ($hashref->{$user}>$cutoff) {
7667: push(@participants, 'active_participant:'.$user);
7668: }
7669: }
7670: &untie_user_hash($hashref);
7671: }
7672: return (@participants,@entries);
7673: }
7674:
7675: sub chat_add {
7676: my ($cdom,$cname,$newchat,$group)=@_;
7677: my @entries=();
7678: my $time=time;
7679: my $namespace = 'nohist_chatroom';
7680: my $logfile = 'chatroom.log';
7681: if ($group ne '') {
7682: $namespace .= '_'.$group;
7683: $logfile = 'chatroom_'.$group.'.log';
7684: }
7685: my $hashref = &tie_user_hash($cdom, $cname, $namespace,
7686: &GDBM_WRCREAT());
7687: if ($hashref) {
7688: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
7689: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
7690: my ($thentime,$idnum)=split(/\_/,$lastid);
7691: my $newid=$time.'_000000';
7692: if ($thentime==$time) {
7693: $idnum=~s/^0+//;
7694: $idnum++;
7695: $idnum=substr('000000'.$idnum,-6,6);
7696: $newid=$time.'_'.$idnum;
7697: }
7698: $hashref->{$newid}=$newchat;
7699: my $expired=$time-3600;
7700: foreach my $comment (keys(%$hashref)) {
7701: my ($thistime) = ($comment=~/(\d+)\_/);
7702: if ($thistime<$expired) {
7703: delete $hashref->{$comment};
7704: }
7705: }
7706: {
7707: my $proname=&propath($cdom,$cname);
7708: if (open(CHATLOG,">>$proname/$logfile")) {
7709: print CHATLOG ("$time:".&unescape($newchat)."\n");
7710: }
7711: close(CHATLOG);
7712: }
7713: &untie_user_hash($hashref);
7714: }
7715: }
7716:
7717: sub unsub {
7718: my ($fname,$clientip)=@_;
7719: my $result;
7720: my $unsubs = 0; # Number of successful unsubscribes:
7721:
7722:
7723: # An old way subscriptions were handled was to have a
7724: # subscription marker file:
7725:
7726: Debug("Attempting unlink of $fname.$clientname");
7727: if (unlink("$fname.$clientname")) {
7728: $unsubs++; # Successful unsub via marker file.
7729: }
7730:
7731: # The more modern way to do it is to have a subscription list
7732: # file:
7733:
7734: if (-e "$fname.subscription") {
7735: my $found=&addline($fname,$clientname,$clientip,'');
7736: if ($found) {
7737: $unsubs++;
7738: }
7739: }
7740:
7741: # If either or both of these mechanisms succeeded in unsubscribing a
7742: # resource we can return ok:
7743:
7744: if($unsubs) {
7745: $result = "ok\n";
7746: } else {
7747: $result = "not_subscribed\n";
7748: }
7749:
7750: return $result;
7751: }
7752:
7753: sub currentversion {
7754: my $fname=shift;
7755: my $version=-1;
7756: my $ulsdir='';
7757: if ($fname=~/^(.+)\/[^\/]+$/) {
7758: $ulsdir=$1;
7759: }
7760: my ($fnamere1,$fnamere2);
7761: # remove version if already specified
7762: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
7763: # get the bits that go before and after the version number
7764: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
7765: $fnamere1=$1;
7766: $fnamere2='.'.$2;
7767: }
7768: if (-e $fname) { $version=1; }
7769: if (-e $ulsdir) {
7770: if(-d $ulsdir) {
7771: if (opendir(LSDIR,$ulsdir)) {
7772: my $ulsfn;
7773: while ($ulsfn=readdir(LSDIR)) {
7774: # see if this is a regular file (ignore links produced earlier)
7775: my $thisfile=$ulsdir.'/'.$ulsfn;
7776: unless (-l $thisfile) {
7777: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
7778: if ($1>$version) { $version=$1; }
7779: }
7780: }
7781: }
7782: closedir(LSDIR);
7783: $version++;
7784: }
7785: }
7786: }
7787: return $version;
7788: }
7789:
7790: sub thisversion {
7791: my $fname=shift;
7792: my $version=-1;
7793: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
7794: $version=$1;
7795: }
7796: return $version;
7797: }
7798:
7799: sub subscribe {
7800: my ($userinput,$clientip)=@_;
7801: my $result;
7802: my ($cmd,$fname)=split(/:/,$userinput,2);
7803: my $ownership=&ishome($fname);
7804: if ($ownership eq 'owner') {
7805: # explitly asking for the current version?
7806: unless (-e $fname) {
7807: my $currentversion=¤tversion($fname);
7808: if (&thisversion($fname)==$currentversion) {
7809: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
7810: my $root=$1;
7811: my $extension=$2;
7812: symlink($root.'.'.$extension,
7813: $root.'.'.$currentversion.'.'.$extension);
7814: unless ($extension=~/\.meta$/) {
7815: symlink($root.'.'.$extension.'.meta',
7816: $root.'.'.$currentversion.'.'.$extension.'.meta');
7817: }
7818: }
7819: }
7820: }
7821: if (-e $fname) {
7822: if (-d $fname) {
7823: $result="directory\n";
7824: } else {
7825: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
7826: my $now=time;
7827: my $found=&addline($fname,$clientname,$clientip,
7828: "$clientname:$clientip:$now\n");
7829: if ($found) { $result="$fname\n"; }
7830: # if they were subscribed to only meta data, delete that
7831: # subscription, when you subscribe to a file you also get
7832: # the metadata
7833: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
7834: $fname=~s/\/home\/httpd\/html\/res/raw/;
7835: my $protocol = $Apache::lonnet::protocol{$perlvar{'lonHostID'}};
7836: $protocol = 'http' if ($protocol ne 'https');
7837: $fname=$protocol.'://'.&Apache::lonnet::hostname($perlvar{'lonHostID'})."/".$fname;
7838: $result="$fname\n";
7839: }
7840: } else {
7841: $result="not_found\n";
7842: }
7843: } else {
7844: $result="rejected\n";
7845: }
7846: return $result;
7847: }
7848: # Change the passwd of a unix user. The caller must have
7849: # first verified that the user is a loncapa user.
7850: #
7851: # Parameters:
7852: # user - Unix user name to change.
7853: # pass - New password for the user.
7854: # Returns:
7855: # ok - if success
7856: # other - Some meaningfule error message string.
7857: # NOTE:
7858: # invokes a setuid script to change the passwd.
7859: sub change_unix_password {
7860: my ($user, $pass) = @_;
7861:
7862: &Debug("change_unix_password");
7863: my $execdir=$perlvar{'lonDaemons'};
7864: &Debug("Opening lcpasswd pipeline");
7865: my $pf = IO::File->new("|$execdir/lcpasswd > "
7866: ."$perlvar{'lonDaemons'}"
7867: ."/logs/lcpasswd.log");
7868: print $pf "$user\n$pass\n$pass\n";
7869: close $pf;
7870: my $err = $?;
7871: return ($err < @passwderrors) ? $passwderrors[$err] :
7872: "pwchange_falure - unknown error";
7873:
7874:
7875: }
7876:
7877:
7878: sub make_passwd_file {
7879: my ($uname,$udom,$umode,$npass,$passfilename,$action)=@_;
7880: my $result="ok";
7881: if ($umode eq 'krb4' or $umode eq 'krb5') {
7882: {
7883: my $pf = IO::File->new(">$passfilename");
7884: if ($pf) {
7885: print $pf "$umode:$npass\n";
7886: &update_passwd_history($uname,$udom,$umode,$action);
7887: } else {
7888: $result = "pass_file_failed_error";
7889: }
7890: }
7891: } elsif ($umode eq 'internal') {
7892: my $ncpass = &hash_passwd($udom,$npass);
7893: {
7894: &Debug("Creating internal auth");
7895: my $pf = IO::File->new(">$passfilename");
7896: if($pf) {
7897: print $pf "internal:$ncpass\n";
7898: &update_passwd_history($uname,$udom,$umode,$action);
7899: } else {
7900: $result = "pass_file_failed_error";
7901: }
7902: }
7903: } elsif ($umode eq 'localauth') {
7904: {
7905: my $pf = IO::File->new(">$passfilename");
7906: if($pf) {
7907: print $pf "localauth:$npass\n";
7908: &update_passwd_history($uname,$udom,$umode,$action);
7909: } else {
7910: $result = "pass_file_failed_error";
7911: }
7912: }
7913: } elsif ($umode eq 'unix') {
7914: &logthis(">>>Attempt to create unix account blocked -- unix auth not available for new users.");
7915: $result="no_new_unix_accounts";
7916: } elsif ($umode eq 'none') {
7917: {
7918: my $pf = IO::File->new("> $passfilename");
7919: if($pf) {
7920: print $pf "none:\n";
7921: } else {
7922: $result = "pass_file_failed_error";
7923: }
7924: }
7925: } else {
7926: $result="auth_mode_error";
7927: }
7928: return $result;
7929: }
7930:
7931: sub convert_photo {
7932: my ($start,$dest)=@_;
7933: system("convert $start $dest");
7934: }
7935:
7936: sub sethost {
7937: my ($remotereq) = @_;
7938: my (undef,$hostid)=split(/:/,$remotereq);
7939: # ignore sethost if we are already correct
7940: if ($hostid eq $currenthostid) {
7941: return 'ok';
7942: }
7943:
7944: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
7945: if (&Apache::lonnet::get_host_ip($perlvar{'lonHostID'})
7946: eq &Apache::lonnet::get_host_ip($hostid)) {
7947: $currenthostid =$hostid;
7948: $currentdomainid=&Apache::lonnet::host_domain($hostid);
7949: # &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
7950: } else {
7951: &logthis("Requested host id $hostid not an alias of ".
7952: $perlvar{'lonHostID'}." refusing connection");
7953: return 'unable_to_set';
7954: }
7955: return 'ok';
7956: }
7957:
7958: sub version {
7959: my ($userinput)=@_;
7960: $remoteVERSION=(split(/:/,$userinput))[1];
7961: return "version:$VERSION";
7962: }
7963:
7964: sub get_usersession_config {
7965: my ($dom,$name) = @_;
7966: my ($usersessionconf,$cached)=&Apache::lonnet::is_cached_new($name,$dom);
7967: if (defined($cached)) {
7968: return $usersessionconf;
7969: } else {
7970: my %domconfig = &Apache::lonnet::get_dom('configuration',['usersessions'],$dom);
7971: if (ref($domconfig{'usersessions'}) eq 'HASH') {
7972: &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'usersessions'},3600);
7973: return $domconfig{'usersessions'};
7974: }
7975: }
7976: return;
7977: }
7978:
7979: sub get_usersearch_config {
7980: my ($dom,$name) = @_;
7981: my ($usersearchconf,$cached)=&Apache::lonnet::is_cached_new($name,$dom);
7982: if (defined($cached)) {
7983: return $usersearchconf;
7984: } else {
7985: my %domconfig = &Apache::lonnet::get_dom('configuration',['directorysrch'],$dom);
7986: &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'directorysrch'},3600);
7987: return $domconfig{'directorysrch'};
7988: }
7989: return;
7990: }
7991:
7992: sub distro_and_arch {
7993: return $dist.':'.$arch;
7994: }
7995:
7996: # ----------------------------------- POD (plain old documentation, CPAN style)
7997:
7998: =head1 NAME
7999:
8000: lond - "LON Daemon" Server (port "LOND" 5663)
8001:
8002: =head1 SYNOPSIS
8003:
8004: Usage: B<lond>
8005:
8006: Should only be run as user=www. This is a command-line script which
8007: is invoked by B<loncron>. There is no expectation that a typical user
8008: will manually start B<lond> from the command-line. (In other words,
8009: DO NOT START B<lond> YOURSELF.)
8010:
8011: =head1 DESCRIPTION
8012:
8013: There are two characteristics associated with the running of B<lond>,
8014: PROCESS MANAGEMENT (starting, stopping, handling child processes)
8015: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
8016: subscriptions, etc). These are described in two large
8017: sections below.
8018:
8019: B<PROCESS MANAGEMENT>
8020:
8021: Preforker - server who forks first. Runs as a daemon. HUPs.
8022: Uses IDEA encryption
8023:
8024: B<lond> forks off children processes that correspond to the other servers
8025: in the network. Management of these processes can be done at the
8026: parent process level or the child process level.
8027:
8028: B<logs/lond.log> is the location of log messages.
8029:
8030: The process management is now explained in terms of linux shell commands,
8031: subroutines internal to this code, and signal assignments:
8032:
8033: =over 4
8034:
8035: =item *
8036:
8037: PID is stored in B<logs/lond.pid>
8038:
8039: This is the process id number of the parent B<lond> process.
8040:
8041: =item *
8042:
8043: SIGTERM and SIGINT
8044:
8045: Parent signal assignment:
8046: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
8047:
8048: Child signal assignment:
8049: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
8050: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
8051: to restart a new child.)
8052:
8053: Command-line invocations:
8054: B<kill> B<-s> SIGTERM I<PID>
8055: B<kill> B<-s> SIGINT I<PID>
8056:
8057: Subroutine B<HUNTSMAN>:
8058: This is only invoked for the B<lond> parent I<PID>.
8059: This kills all the children, and then the parent.
8060: The B<lonc.pid> file is cleared.
8061:
8062: =item *
8063:
8064: SIGHUP
8065:
8066: Current bug:
8067: This signal can only be processed the first time
8068: on the parent process. Subsequent SIGHUP signals
8069: have no effect.
8070:
8071: Parent signal assignment:
8072: $SIG{HUP} = \&HUPSMAN;
8073:
8074: Child signal assignment:
8075: none (nothing happens)
8076:
8077: Command-line invocations:
8078: B<kill> B<-s> SIGHUP I<PID>
8079:
8080: Subroutine B<HUPSMAN>:
8081: This is only invoked for the B<lond> parent I<PID>,
8082: This kills all the children, and then the parent.
8083: The B<lond.pid> file is cleared.
8084:
8085: =item *
8086:
8087: SIGUSR1
8088:
8089: Parent signal assignment:
8090: $SIG{USR1} = \&USRMAN;
8091:
8092: Child signal assignment:
8093: $SIG{USR1}= \&logstatus;
8094:
8095: Command-line invocations:
8096: B<kill> B<-s> SIGUSR1 I<PID>
8097:
8098: Subroutine B<USRMAN>:
8099: When invoked for the B<lond> parent I<PID>,
8100: SIGUSR1 is sent to all the children, and the status of
8101: each connection is logged.
8102:
8103: =item *
8104:
8105: SIGUSR2
8106:
8107: Parent Signal assignment:
8108: $SIG{USR2} = \&UpdateHosts
8109:
8110: Child signal assignment:
8111: NONE
8112:
8113:
8114: =item *
8115:
8116: SIGCHLD
8117:
8118: Parent signal assignment:
8119: $SIG{CHLD} = \&REAPER;
8120:
8121: Child signal assignment:
8122: none
8123:
8124: Command-line invocations:
8125: B<kill> B<-s> SIGCHLD I<PID>
8126:
8127: Subroutine B<REAPER>:
8128: This is only invoked for the B<lond> parent I<PID>.
8129: Information pertaining to the child is removed.
8130: The socket port is cleaned up.
8131:
8132: =back
8133:
8134: B<SERVER-SIDE ACTIVITIES>
8135:
8136: Server-side information can be accepted in an encrypted or non-encrypted
8137: method.
8138:
8139: =over 4
8140:
8141: =item ping
8142:
8143: Query a client in the hosts.tab table; "Are you there?"
8144:
8145: =item pong
8146:
8147: Respond to a ping query.
8148:
8149: =item ekey
8150:
8151: Read in encrypted key, make cipher. Respond with a buildkey.
8152:
8153: =item load
8154:
8155: Respond with CPU load based on a computation upon /proc/loadavg.
8156:
8157: =item currentauth
8158:
8159: Reply with current authentication information (only over an
8160: encrypted channel).
8161:
8162: =item auth
8163:
8164: Only over an encrypted channel, reply as to whether a user's
8165: authentication information can be validated.
8166:
8167: =item passwd
8168:
8169: Allow for a password to be set.
8170:
8171: =item makeuser
8172:
8173: Make a user.
8174:
8175: =item passwd
8176:
8177: Allow for authentication mechanism and password to be changed.
8178:
8179: =item home
8180:
8181: Respond to a question "are you the home for a given user?"
8182:
8183: =item update
8184:
8185: Update contents of a subscribed resource.
8186:
8187: =item unsubscribe
8188:
8189: The server is unsubscribing from a resource.
8190:
8191: =item subscribe
8192:
8193: The server is subscribing to a resource.
8194:
8195: =item log
8196:
8197: Place in B<logs/lond.log>
8198:
8199: =item put
8200:
8201: stores hash in namespace
8202:
8203: =item rolesput
8204:
8205: put a role into a user's environment
8206:
8207: =item get
8208:
8209: returns hash with keys from array
8210: reference filled in from namespace
8211:
8212: =item eget
8213:
8214: returns hash with keys from array
8215: reference filled in from namesp (encrypts the return communication)
8216:
8217: =item rolesget
8218:
8219: get a role from a user's environment
8220:
8221: =item del
8222:
8223: deletes keys out of array from namespace
8224:
8225: =item keys
8226:
8227: returns namespace keys
8228:
8229: =item dump
8230:
8231: dumps the complete (or key matching regexp) namespace into a hash
8232:
8233: =item store
8234:
8235: stores hash permanently
8236: for this url; hashref needs to be given and should be a \%hashname; the
8237: remaining args aren't required and if they aren't passed or are '' they will
8238: be derived from the ENV
8239:
8240: =item restore
8241:
8242: returns a hash for a given url
8243:
8244: =item querysend
8245:
8246: Tells client about the lonsql process that has been launched in response
8247: to a sent query.
8248:
8249: =item queryreply
8250:
8251: Accept information from lonsql and make appropriate storage in temporary
8252: file space.
8253:
8254: =item idput
8255:
8256: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
8257: for each student, defined perhaps by the institutional Registrar.)
8258:
8259: =item idget
8260:
8261: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
8262: for each student, defined perhaps by the institutional Registrar.)
8263:
8264: =item tmpput
8265:
8266: Accept and store information in temporary space.
8267:
8268: =item tmpget
8269:
8270: Send along temporarily stored information.
8271:
8272: =item ls
8273:
8274: List part of a user's directory.
8275:
8276: =item pushtable
8277:
8278: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
8279: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
8280: must be restored manually in case of a problem with the new table file.
8281: pushtable requires that the request be encrypted and validated via
8282: ValidateManager. The form of the command is:
8283: enc:pushtable tablename <tablecontents> \n
8284: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
8285: cleartext newline.
8286:
8287: =item Hanging up (exit or init)
8288:
8289: What to do when a client tells the server that they (the client)
8290: are leaving the network.
8291:
8292: =item unknown command
8293:
8294: If B<lond> is sent an unknown command (not in the list above),
8295: it replys to the client "unknown_cmd".
8296:
8297:
8298: =item UNKNOWN CLIENT
8299:
8300: If the anti-spoofing algorithm cannot verify the client,
8301: the client is rejected (with a "refused" message sent
8302: to the client, and the connection is closed.
8303:
8304: =back
8305:
8306: =head1 PREREQUISITES
8307:
8308: IO::Socket
8309: IO::File
8310: Apache::File
8311: POSIX
8312: Crypt::IDEA
8313: LWP::UserAgent()
8314: GDBM_File
8315: Authen::Krb4
8316: Authen::Krb5
8317:
8318: =head1 COREQUISITES
8319:
8320: =head1 OSNAMES
8321:
8322: linux
8323:
8324: =head1 SCRIPT CATEGORIES
8325:
8326: Server/Process
8327:
8328: =cut
8329:
8330:
8331: =pod
8332:
8333: =head1 LOG MESSAGES
8334:
8335: The messages below can be emitted in the lond log. This log is located
8336: in ~httpd/perl/logs/lond.log Many log messages have HTML encapsulation
8337: to provide coloring if examined from inside a web page. Some do not.
8338: Where color is used, the colors are; Red for sometihhng to get excited
8339: about and to follow up on. Yellow for something to keep an eye on to
8340: be sure it does not get worse, Green,and Blue for informational items.
8341:
8342: In the discussions below, sometimes reference is made to ~httpd
8343: when describing file locations. There isn't really an httpd
8344: user, however there is an httpd directory that gets installed in the
8345: place that user home directories go. On linux, this is usually
8346: (always?) /home/httpd.
8347:
8348:
8349: Some messages are colorless. These are usually (not always)
8350: Green/Blue color level messages.
8351:
8352: =over 2
8353:
8354: =item (Red) LocalConnection rejecting non local: <ip> ne 127.0.0.1
8355:
8356: A local connection negotiation was attempted by
8357: a host whose IP address was not 127.0.0.1.
8358: The socket is closed and the child will exit.
8359: lond has three ways to establish an encyrption
8360: key with a client:
8361:
8362: =over 2
8363:
8364: =item local
8365:
8366: The key is written and read from a file.
8367: This is only valid for connections from localhost.
8368:
8369: =item insecure
8370:
8371: The key is generated by the server and
8372: transmitted to the client.
8373:
8374: =item ssl (secure)
8375:
8376: An ssl connection is negotiated with the client,
8377: the key is generated by the server and sent to the
8378: client across this ssl connection before the
8379: ssl connectionis terminated and clear text
8380: transmission resumes.
8381:
8382: =back
8383:
8384: =item (Red) LocalConnection: caller is insane! init = <init> and type = <type>
8385:
8386: The client is local but has not sent an initialization
8387: string that is the literal "init:local" The connection
8388: is closed and the child exits.
8389:
8390: =item Red CRITICAL Can't get key file <error>
8391:
8392: SSL key negotiation is being attempted but the call to
8393: lonssl::KeyFile failed. This usually means that the
8394: configuration file is not correctly defining or protecting
8395: the directories/files lonCertificateDirectory or
8396: lonnetPrivateKey
8397: <error> is a string that describes the reason that
8398: the key file could not be located.
8399:
8400: =item (Red) CRITICAL Can't get certificates <error>
8401:
8402: SSL key negotiation failed because we were not able to retrives our certificate
8403: or the CA's certificate in the call to lonssl::CertificateFile
8404: <error> is the textual reason this failed. Usual reasons:
8405:
8406: =over 2
8407:
8408: =item Apache config file for loncapa incorrect:
8409:
8410: one of the variables
8411: lonCertificateDirectory, lonnetCertificateAuthority, or lonnetCertificate
8412: undefined or incorrect
8413:
8414: =item Permission error:
8415:
8416: The directory pointed to by lonCertificateDirectory is not readable by lond
8417:
8418: =item Permission error:
8419:
8420: Files in the directory pointed to by lonCertificateDirectory are not readable by lond.
8421:
8422: =item Installation error:
8423:
8424: Either the certificate authority file or the certificate have not
8425: been installed in lonCertificateDirectory.
8426:
8427: =item (Red) CRITICAL SSL Socket promotion failed: <err>
8428:
8429: The promotion of the connection from plaintext to SSL failed
8430: <err> is the reason for the failure. There are two
8431: system calls involved in the promotion (one of which failed),
8432: a dup to produce
8433: a second fd on the raw socket over which the encrypted data
8434: will flow and IO::SOcket::SSL->new_from_fd which creates
8435: the SSL connection on the duped fd.
8436:
8437: =item (Blue) WARNING client did not respond to challenge
8438:
8439: This occurs on an insecure (non SSL) connection negotiation request.
8440: lond generates some number from the time, the PID and sends it to
8441: the client. The client must respond by echoing this information back.
8442: If the client does not do so, that's a violation of the challenge
8443: protocols and the connection will be failed.
8444:
8445: =item (Red) No manager table. Nobody can manage!!
8446:
8447: lond has the concept of privileged hosts that
8448: can perform remote management function such
8449: as update the hosts.tab. The manager hosts
8450: are described in the
8451: ~httpd/lonTabs/managers.tab file.
8452: this message is logged if this file is missing.
8453:
8454:
8455: =item (Green) Registering manager <dnsname> as <cluster_name> with <ipaddress>
8456:
8457: Reports the successful parse and registration
8458: of a specific manager.
8459:
8460: =item Green existing host <clustername:dnsname>
8461:
8462: The manager host is already defined in the hosts.tab
8463: the information in that table, rather than the info in the
8464: manager table will be used to determine the manager's ip.
8465:
8466: =item (Red) Unable to craete <filename>
8467:
8468: lond has been asked to create new versions of an administrative
8469: file (by a manager). When this is done, the new file is created
8470: in a temp file and then renamed into place so that there are always
8471: usable administrative files, even if the update fails. This failure
8472: message means that the temp file could not be created.
8473: The update is abandoned, and the old file is available for use.
8474:
8475: =item (Green) CopyFile from <oldname> to <newname> failed
8476:
8477: In an update of administrative files, the copy of the existing file to a
8478: backup file failed. The installation of the new file may still succeed,
8479: but there will not be a back up file to rever to (this should probably
8480: be yellow).
8481:
8482: =item (Green) Pushfile: backed up <oldname> to <newname>
8483:
8484: See above, the backup of the old administrative file succeeded.
8485:
8486: =item (Red) Pushfile: Unable to install <filename> <reason>
8487:
8488: The new administrative file could not be installed. In this case,
8489: the old administrative file is still in use.
8490:
8491: =item (Green) Installed new < filename>.
8492:
8493: The new administrative file was successfullly installed.
8494:
8495: =item (Red) Reinitializing lond pid=<pid>
8496:
8497: The lonc child process <pid> will be sent a USR2
8498: signal.
8499:
8500: =item (Red) Reinitializing self
8501:
8502: We've been asked to re-read our administrative files,and
8503: are doing so.
8504:
8505: =item (Yellow) error:Invalid process identifier <ident>
8506:
8507: A reinit command was received, but the target part of the
8508: command was not valid. It must be either
8509: 'lond' or 'lonc' but was <ident>
8510:
8511: =item (Green) isValideditCommand checking: Command = <command> Key = <key> newline = <newline>
8512:
8513: Checking to see if lond has been handed a valid edit
8514: command. It is possible the edit command is not valid
8515: in that case there are no log messages to indicate that.
8516:
8517: =item Result of password change for <username> pwchange_success
8518:
8519: The password for <username> was
8520: successfully changed.
8521:
8522: =item Unable to open <user> passwd to change password
8523:
8524: Could not rewrite the
8525: internal password file for a user
8526:
8527: =item Result of password change for <user> : <result>
8528:
8529: A unix password change for <user> was attempted
8530: and the pipe returned <result>
8531:
8532: =item LWP GET: <message> for <fname> (<remoteurl>)
8533:
8534: The lightweight process fetch for a resource failed
8535: with <message> the local filename that should
8536: have existed/been created was <fname> the
8537: corresponding URI: <remoteurl> This is emitted in several
8538: places.
8539:
8540: =item Unable to move <transname> to <destname>
8541:
8542: From fetch_user_file_handler - the user file was replicated but could not
8543: be mv'd to its final location.
8544:
8545: =item Looking for <domain> <username>
8546:
8547: From user_has_session_handler - This should be a Debug call instead
8548: it indicates lond is about to check whether the specified user has a
8549: session active on the specified domain on the local host.
8550:
8551: =item Client <ip> (<name>) hanging up: <input>
8552:
8553: lond has been asked to exit by its client. The <ip> and <name> identify the
8554: client systemand <input> is the full exit command sent to the server.
8555:
8556: =item Red CRITICAL: ABNORMAL EXIT. child <pid> for server <hostname> died through a crass with this error->[<message>].
8557:
8558: A lond child terminated. NOte that this termination can also occur when the
8559: child receives the QUIT or DIE signals. <pid> is the process id of the child,
8560: <hostname> the host lond is working for, and <message> the reason the child died
8561: to the best of our ability to get it (I would guess that any numeric value
8562: represents and errno value). This is immediately followed by
8563:
8564: =item Famous last words: Catching exception - <log>
8565:
8566: Where log is some recent information about the state of the child.
8567:
8568: =item Red CRITICAL: TIME OUT <pid>
8569:
8570: Some timeout occured for server <pid>. THis is normally a timeout on an LWP
8571: doing an HTTP::GET.
8572:
8573: =item child <pid> died
8574:
8575: The reaper caught a SIGCHILD for the lond child process <pid>
8576: This should be modified to also display the IP of the dying child
8577: $children{$pid}
8578:
8579: =item Unknown child 0 died
8580: A child died but the wait for it returned a pid of zero which really should not
8581: ever happen.
8582:
8583: =item Child <which> - <pid> looks like we missed it's death
8584:
8585: When a sigchild is received, the reaper process checks all children to see if they are
8586: alive. If children are dying quite quickly, the lack of signal queuing can mean
8587: that a signal hearalds the death of more than one child. If so this message indicates
8588: which other one died. <which> is the ip of a dead child
8589:
8590: =item Free socket: <shutdownretval>
8591:
8592: The HUNTSMAN sub was called due to a SIGINT in a child process. The socket is being shutdown.
8593: for whatever reason, <shutdownretval> is printed but in fact shutdown() is not documented
8594: to return anything. This is followed by:
8595:
8596: =item Red CRITICAL: Shutting down
8597:
8598: Just prior to exit.
8599:
8600: =item Free socket: <shutdownretval>
8601:
8602: The HUPSMAN sub was called due to a SIGHUP. all children get killsed, and lond execs itself.
8603: This is followed by:
8604:
8605: =item (Red) CRITICAL: Restarting
8606:
8607: lond is about to exec itself to restart.
8608:
8609: =item (Blue) Updating connections
8610:
8611: (In response to a USR2). All the children (except the one for localhost)
8612: are about to be killed, the hosts tab reread, and Apache reloaded via apachereload.
8613:
8614: =item (Blue) UpdateHosts killing child <pid> for ip <ip>
8615:
8616: Due to USR2 as above.
8617:
8618: =item (Green) keeping child for ip <ip> (pid = <pid>)
8619:
8620: In response to USR2 as above, the child indicated is not being restarted because
8621: it's assumed that we'll always need a child for the localhost.
8622:
8623:
8624: =item Going to check on the children
8625:
8626: Parent is about to check on the health of the child processes.
8627: Note that this is in response to a USR1 sent to the parent lond.
8628: there may be one or more of the next two messages:
8629:
8630: =item <pid> is dead
8631:
8632: A child that we have in our child hash as alive has evidently died.
8633:
8634: =item Child <pid> did not respond
8635:
8636: In the health check the child <pid> did not update/produce a pid_.txt
8637: file when sent it's USR1 signal. That process is killed with a 9 signal, as it's
8638: assumed to be hung in some un-fixable way.
8639:
8640: =item Finished checking children
8641:
8642: Master processs's USR1 processing is cojmplete.
8643:
8644: =item (Red) CRITICAL: ------- Starting ------
8645:
8646: (There are more '-'s on either side). Lond has forked itself off to
8647: form a new session and is about to start actual initialization.
8648:
8649: =item (Green) Attempting to start child (<client>)
8650:
8651: Started a new child process for <client>. Client is IO::Socket object
8652: connected to the child. This was as a result of a TCP/IP connection from a client.
8653:
8654: =item Unable to determine who caller was, getpeername returned nothing
8655:
8656: In child process initialization. either getpeername returned undef or
8657: a zero sized object was returned. Processing continues, but in my opinion,
8658: this should be cause for the child to exit.
8659:
8660: =item Unable to determine clientip
8661:
8662: In child process initialization. The peer address from getpeername was not defined.
8663: The client address is stored as "Unavailable" and processing continues.
8664:
8665: =item (Yellow) INFO: Connection <ip> <name> connection type = <type>
8666:
8667: In child initialization. A good connectionw as received from <ip>.
8668:
8669: =over 2
8670:
8671: =item <name>
8672:
8673: is the name of the client from hosts.tab.
8674:
8675: =item <type>
8676:
8677: Is the connection type which is either
8678:
8679: =over 2
8680:
8681: =item manager
8682:
8683: The connection is from a manager node, not in hosts.tab
8684:
8685: =item client
8686:
8687: the connection is from a non-manager in the hosts.tab
8688:
8689: =item both
8690:
8691: The connection is from a manager in the hosts.tab.
8692:
8693: =back
8694:
8695: =back
8696:
8697: =item (Blue) Certificates not installed -- trying insecure auth
8698:
8699: One of the certificate file, key file or
8700: certificate authority file could not be found for a client attempting
8701: SSL connection intiation. COnnection will be attemptied in in-secure mode.
8702: (this would be a system with an up to date lond that has not gotten a
8703: certificate from us).
8704:
8705: =item (Green) Successful local authentication
8706:
8707: A local connection successfully negotiated the encryption key.
8708: In this case the IDEA key is in a file (that is hopefully well protected).
8709:
8710: =item (Green) Successful ssl authentication with <client>
8711:
8712: The client (<client> is the peer's name in hosts.tab), has successfully
8713: negotiated an SSL connection with this child process.
8714:
8715: =item (Green) Successful insecure authentication with <client>
8716:
8717:
8718: The client has successfully negotiated an insecure connection withthe child process.
8719:
8720: =item (Yellow) Attempted insecure connection disallowed
8721:
8722: The client attempted and failed to successfully negotiate a successful insecure
8723: connection. This can happen either because the variable londAllowInsecure is false
8724: or undefined, or becuse the child did not successfully echo back the challenge
8725: string.
8726:
8727:
8728: =back
8729:
8730: =back
8731:
8732:
8733: =cut
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