Annotation of loncom/lond, revision 1.438
1.1 albertel 1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
1.60 www 4: #
1.438 ! raeburn 5: # $Id: lond,v 1.437 2010/02/21 02:02:51 raeburn Exp $
1.60 www 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
1.167 foxr 13: # the Free Software Foundation; either version 2 of the License, or
1.60 www 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
1.178 foxr 23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
1.60 www 24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
1.161 foxr 27:
28:
1.60 www 29: # http://www.lon-capa.org/
30: #
1.54 harris41 31:
1.134 albertel 32: use strict;
1.80 harris41 33: use lib '/home/httpd/lib/perl/';
1.325 albertel 34: use LONCAPA;
1.80 harris41 35: use LONCAPA::Configuration;
36:
1.1 albertel 37: use IO::Socket;
38: use IO::File;
1.126 albertel 39: #use Apache::File;
1.1 albertel 40: use POSIX;
41: use Crypt::IDEA;
42: use LWP::UserAgent();
1.347 raeburn 43: use Digest::MD5 qw(md5_hex);
1.3 www 44: use GDBM_File;
45: use Authen::Krb4;
1.91 albertel 46: use Authen::Krb5;
1.49 albertel 47: use localauth;
1.193 raeburn 48: use localenroll;
1.265 albertel 49: use localstudentphoto;
1.143 foxr 50: use File::Copy;
1.292 albertel 51: use File::Find;
1.200 matthew 52: use LONCAPA::lonlocal;
53: use LONCAPA::lonssl;
1.221 albertel 54: use Fcntl qw(:flock);
1.383 raeburn 55: use Apache::lonnet;
1.1 albertel 56:
1.414 foxr 57: my $DEBUG = 0; # Non zero to enable debug log entries.
1.77 foxr 58:
1.57 www 59: my $status='';
60: my $lastlog='';
61:
1.438 ! raeburn 62: my $VERSION='$Revision: 1.437 $'; #' stupid emacs
1.121 albertel 63: my $remoteVERSION;
1.214 foxr 64: my $currenthostid="default";
1.115 albertel 65: my $currentdomainid;
1.134 albertel 66:
67: my $client;
1.200 matthew 68: my $clientip; # IP address of client.
69: my $clientname; # LonCAPA name of client.
1.432 raeburn 70: my $clientversion; # LonCAPA version running on client
1.140 foxr 71:
1.134 albertel 72: my $server;
1.200 matthew 73:
74: my $keymode;
1.198 foxr 75:
1.207 foxr 76: my $cipher; # Cipher key negotiated with client
77: my $tmpsnum = 0; # Id of tmpputs.
78:
1.178 foxr 79: #
80: # Connection type is:
81: # client - All client actions are allowed
82: # manager - only management functions allowed.
83: # both - Both management and client actions are allowed
84: #
1.161 foxr 85:
1.178 foxr 86: my $ConnectionType;
1.161 foxr 87:
1.178 foxr 88: my %managers; # Ip -> manager names
1.161 foxr 89:
1.178 foxr 90: my %perlvar; # Will have the apache conf defined perl vars.
1.134 albertel 91:
1.178 foxr 92: #
1.207 foxr 93: # The hash below is used for command dispatching, and is therefore keyed on the request keyword.
94: # Each element of the hash contains a reference to an array that contains:
95: # A reference to a sub that executes the request corresponding to the keyword.
96: # A flag that is true if the request must be encoded to be acceptable.
97: # A mask with bits as follows:
98: # CLIENT_OK - Set when the function is allowed by ordinary clients
99: # MANAGER_OK - Set when the function is allowed to manager clients.
100: #
101: my $CLIENT_OK = 1;
102: my $MANAGER_OK = 2;
103: my %Dispatcher;
104:
105:
106: #
1.178 foxr 107: # The array below are password error strings."
108: #
109: my $lastpwderror = 13; # Largest error number from lcpasswd.
110: my @passwderrors = ("ok",
1.287 foxr 111: "pwchange_failure - lcpasswd must be run as user 'www'",
112: "pwchange_failure - lcpasswd got incorrect number of arguments",
113: "pwchange_failure - lcpasswd did not get the right nubmer of input text lines",
114: "pwchange_failure - lcpasswd too many simultaneous pwd changes in progress",
115: "pwchange_failure - lcpasswd User does not exist.",
116: "pwchange_failure - lcpasswd Incorrect current passwd",
117: "pwchange_failure - lcpasswd Unable to su to root.",
118: "pwchange_failure - lcpasswd Cannot set new passwd.",
119: "pwchange_failure - lcpasswd Username has invalid characters",
120: "pwchange_failure - lcpasswd Invalid characters in password",
121: "pwchange_failure - lcpasswd User already exists",
122: "pwchange_failure - lcpasswd Something went wrong with user addition.",
123: "pwchange_failure - lcpasswd Password mismatch",
124: "pwchange_failure - lcpasswd Error filename is invalid");
1.97 foxr 125:
126:
1.178 foxr 127: # The array below are lcuseradd error strings.:
1.97 foxr 128:
1.178 foxr 129: my $lastadderror = 13;
130: my @adderrors = ("ok",
131: "User ID mismatch, lcuseradd must run as user www",
132: "lcuseradd Incorrect number of command line parameters must be 3",
133: "lcuseradd Incorrect number of stdinput lines, must be 3",
134: "lcuseradd Too many other simultaneous pwd changes in progress",
135: "lcuseradd User does not exist",
136: "lcuseradd Unable to make www member of users's group",
137: "lcuseradd Unable to su to root",
138: "lcuseradd Unable to set password",
1.377 albertel 139: "lcuseradd Username has invalid characters",
1.178 foxr 140: "lcuseradd Password has an invalid character",
141: "lcuseradd User already exists",
142: "lcuseradd Could not add user.",
143: "lcuseradd Password mismatch");
1.97 foxr 144:
1.96 foxr 145:
1.412 foxr 146: # This array are the errors from lcinstallfile:
147:
148: my @installerrors = ("ok",
149: "Initial user id of client not that of www",
150: "Usage error, not enough command line arguments",
151: "Source file name does not exist",
152: "Destination file name does not exist",
153: "Some file operation failed",
154: "Invalid table filename."
155: );
1.207 foxr 156:
157: #
158: # Statistics that are maintained and dislayed in the status line.
159: #
1.212 foxr 160: my $Transactions = 0; # Number of attempted transactions.
161: my $Failures = 0; # Number of transcations failed.
1.207 foxr 162:
163: # ResetStatistics:
164: # Resets the statistics counters:
165: #
166: sub ResetStatistics {
167: $Transactions = 0;
168: $Failures = 0;
169: }
170:
1.200 matthew 171: #------------------------------------------------------------------------
172: #
173: # LocalConnection
174: # Completes the formation of a locally authenticated connection.
175: # This function will ensure that the 'remote' client is really the
176: # local host. If not, the connection is closed, and the function fails.
177: # If so, initcmd is parsed for the name of a file containing the
178: # IDEA session key. The fie is opened, read, deleted and the session
179: # key returned to the caller.
180: #
181: # Parameters:
182: # $Socket - Socket open on client.
183: # $initcmd - The full text of the init command.
184: #
185: # Returns:
186: # IDEA session key on success.
187: # undef on failure.
188: #
189: sub LocalConnection {
190: my ($Socket, $initcmd) = @_;
1.373 albertel 191: Debug("Attempting local connection: $initcmd client: $clientip");
1.277 albertel 192: if($clientip ne "127.0.0.1") {
1.200 matthew 193: &logthis('<font color="red"> LocalConnection rejecting non local: '
1.373 albertel 194: ."$clientip ne 127.0.0.1 </font>");
1.200 matthew 195: close $Socket;
196: return undef;
1.224 foxr 197: } else {
1.200 matthew 198: chomp($initcmd); # Get rid of \n in filename.
199: my ($init, $type, $name) = split(/:/, $initcmd);
200: Debug(" Init command: $init $type $name ");
201:
202: # Require that $init = init, and $type = local: Otherwise
203: # the caller is insane:
204:
205: if(($init ne "init") && ($type ne "local")) {
206: &logthis('<font color = "red"> LocalConnection: caller is insane! '
207: ."init = $init, and type = $type </font>");
208: close($Socket);;
209: return undef;
210:
211: }
212: # Now get the key filename:
213:
214: my $IDEAKey = lonlocal::ReadKeyFile($name);
215: return $IDEAKey;
216: }
217: }
218: #------------------------------------------------------------------------------
219: #
220: # SSLConnection
221: # Completes the formation of an ssh authenticated connection. The
222: # socket is promoted to an ssl socket. If this promotion and the associated
223: # certificate exchange are successful, the IDEA key is generated and sent
224: # to the remote peer via the SSL tunnel. The IDEA key is also returned to
225: # the caller after the SSL tunnel is torn down.
226: #
227: # Parameters:
228: # Name Type Purpose
229: # $Socket IO::Socket::INET Plaintext socket.
230: #
231: # Returns:
232: # IDEA key on success.
233: # undef on failure.
234: #
235: sub SSLConnection {
236: my $Socket = shift;
237:
238: Debug("SSLConnection: ");
239: my $KeyFile = lonssl::KeyFile();
240: if(!$KeyFile) {
241: my $err = lonssl::LastError();
242: &logthis("<font color=\"red\"> CRITICAL"
243: ."Can't get key file $err </font>");
244: return undef;
245: }
246: my ($CACertificate,
247: $Certificate) = lonssl::CertificateFile();
248:
249:
250: # If any of the key, certificate or certificate authority
251: # certificate filenames are not defined, this can't work.
252:
253: if((!$Certificate) || (!$CACertificate)) {
254: my $err = lonssl::LastError();
255: &logthis("<font color=\"red\"> CRITICAL"
256: ."Can't get certificates: $err </font>");
257:
258: return undef;
259: }
260: Debug("Key: $KeyFile CA: $CACertificate Cert: $Certificate");
261:
262: # Indicate to our peer that we can procede with
263: # a transition to ssl authentication:
264:
265: print $Socket "ok:ssl\n";
266:
267: Debug("Approving promotion -> ssl");
268: # And do so:
269:
270: my $SSLSocket = lonssl::PromoteServerSocket($Socket,
271: $CACertificate,
272: $Certificate,
273: $KeyFile);
274: if(! ($SSLSocket) ) { # SSL socket promotion failed.
275: my $err = lonssl::LastError();
276: &logthis("<font color=\"red\"> CRITICAL "
277: ."SSL Socket promotion failed: $err </font>");
278: return undef;
279: }
280: Debug("SSL Promotion successful");
281:
282: #
283: # The only thing we'll use the socket for is to send the IDEA key
284: # to the peer:
285:
286: my $Key = lonlocal::CreateCipherKey();
287: print $SSLSocket "$Key\n";
288:
289: lonssl::Close($SSLSocket);
290:
291: Debug("Key exchange complete: $Key");
292:
293: return $Key;
294: }
295: #
296: # InsecureConnection:
297: # If insecure connections are allowd,
298: # exchange a challenge with the client to 'validate' the
299: # client (not really, but that's the protocol):
300: # We produce a challenge string that's sent to the client.
301: # The client must then echo the challenge verbatim to us.
302: #
303: # Parameter:
304: # Socket - Socket open on the client.
305: # Returns:
306: # 1 - success.
307: # 0 - failure (e.g.mismatch or insecure not allowed).
308: #
309: sub InsecureConnection {
310: my $Socket = shift;
311:
312: # Don't even start if insecure connections are not allowed.
313:
314: if(! $perlvar{londAllowInsecure}) { # Insecure connections not allowed.
315: return 0;
316: }
317:
318: # Fabricate a challenge string and send it..
319:
320: my $challenge = "$$".time; # pid + time.
321: print $Socket "$challenge\n";
322: &status("Waiting for challenge reply");
323:
324: my $answer = <$Socket>;
325: $answer =~s/\W//g;
326: if($challenge eq $answer) {
327: return 1;
1.224 foxr 328: } else {
1.200 matthew 329: logthis("<font color='blue'>WARNING client did not respond to challenge</font>");
330: &status("No challenge reqply");
331: return 0;
332: }
333:
334:
335: }
1.251 foxr 336: #
337: # Safely execute a command (as long as it's not a shel command and doesn
338: # not require/rely on shell escapes. The function operates by doing a
339: # a pipe based fork and capturing stdout and stderr from the pipe.
340: #
341: # Formal Parameters:
342: # $line - A line of text to be executed as a command.
343: # Returns:
344: # The output from that command. If the output is multiline the caller
345: # must know how to split up the output.
346: #
347: #
348: sub execute_command {
349: my ($line) = @_;
350: my @words = split(/\s/, $line); # Bust the command up into words.
351: my $output = "";
352:
353: my $pid = open(CHILD, "-|");
354:
355: if($pid) { # Parent process
356: Debug("In parent process for execute_command");
357: my @data = <CHILD>; # Read the child's outupt...
358: close CHILD;
359: foreach my $output_line (@data) {
360: Debug("Adding $output_line");
361: $output .= $output_line; # Presumably has a \n on it.
362: }
363:
364: } else { # Child process
365: close (STDERR);
366: open (STDERR, ">&STDOUT");# Combine stderr, and stdout...
367: exec(@words); # won't return.
368: }
369: return $output;
370: }
371:
1.200 matthew 372:
1.140 foxr 373: # GetCertificate: Given a transaction that requires a certificate,
374: # this function will extract the certificate from the transaction
375: # request. Note that at this point, the only concept of a certificate
376: # is the hostname to which we are connected.
377: #
378: # Parameter:
379: # request - The request sent by our client (this parameterization may
380: # need to change when we really use a certificate granting
381: # authority.
382: #
383: sub GetCertificate {
384: my $request = shift;
385:
386: return $clientip;
387: }
1.161 foxr 388:
1.178 foxr 389: #
390: # Return true if client is a manager.
391: #
392: sub isManager {
393: return (($ConnectionType eq "manager") || ($ConnectionType eq "both"));
394: }
395: #
396: # Return tru if client can do client functions
397: #
398: sub isClient {
399: return (($ConnectionType eq "client") || ($ConnectionType eq "both"));
400: }
1.161 foxr 401:
402:
1.156 foxr 403: #
404: # ReadManagerTable: Reads in the current manager table. For now this is
405: # done on each manager authentication because:
406: # - These authentications are not frequent
407: # - This allows dynamic changes to the manager table
408: # without the need to signal to the lond.
409: #
410: sub ReadManagerTable {
411:
1.412 foxr 412: &Debug("Reading manager table");
1.156 foxr 413: # Clean out the old table first..
414:
1.166 foxr 415: foreach my $key (keys %managers) {
416: delete $managers{$key};
417: }
418:
419: my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
420: if (!open (MANAGERS, $tablename)) {
421: logthis('<font color="red">No manager table. Nobody can manage!!</font>');
422: return;
423: }
424: while(my $host = <MANAGERS>) {
425: chomp($host);
426: if ($host =~ "^#") { # Comment line.
427: next;
428: }
1.368 albertel 429: if (!defined &Apache::lonnet::get_host_ip($host)) { # This is a non cluster member
1.161 foxr 430: # The entry is of the form:
431: # cluname:hostname
432: # cluname - A 'cluster hostname' is needed in order to negotiate
433: # the host key.
434: # hostname- The dns name of the host.
435: #
1.166 foxr 436: my($cluname, $dnsname) = split(/:/, $host);
437:
438: my $ip = gethostbyname($dnsname);
439: if(defined($ip)) { # bad names don't deserve entry.
440: my $hostip = inet_ntoa($ip);
441: $managers{$hostip} = $cluname;
442: logthis('<font color="green"> registering manager '.
443: "$dnsname as $cluname with $hostip </font>\n");
444: }
445: } else {
446: logthis('<font color="green"> existing host'." $host</font>\n");
1.368 albertel 447: $managers{&Apache::lonnet::get_host_ip($host)} = $host; # Use info from cluster tab if clumemeber
1.166 foxr 448: }
449: }
1.156 foxr 450: }
1.140 foxr 451:
452: #
453: # ValidManager: Determines if a given certificate represents a valid manager.
454: # in this primitive implementation, the 'certificate' is
455: # just the connecting loncapa client name. This is checked
456: # against a valid client list in the configuration.
457: #
458: #
459: sub ValidManager {
460: my $certificate = shift;
461:
1.163 foxr 462: return isManager;
1.140 foxr 463: }
464: #
1.143 foxr 465: # CopyFile: Called as part of the process of installing a
466: # new configuration file. This function copies an existing
467: # file to a backup file.
468: # Parameters:
469: # oldfile - Name of the file to backup.
470: # newfile - Name of the backup file.
471: # Return:
472: # 0 - Failure (errno has failure reason).
473: # 1 - Success.
474: #
475: sub CopyFile {
1.192 foxr 476:
477: my ($oldfile, $newfile) = @_;
1.143 foxr 478:
1.281 matthew 479: if (! copy($oldfile,$newfile)) {
480: return 0;
1.143 foxr 481: }
1.281 matthew 482: chmod(0660, $newfile);
483: return 1;
1.143 foxr 484: }
1.157 foxr 485: #
486: # Host files are passed out with externally visible host IPs.
487: # If, for example, we are behind a fire-wall or NAT host, our
488: # internally visible IP may be different than the externally
489: # visible IP. Therefore, we always adjust the contents of the
490: # host file so that the entry for ME is the IP that we believe
491: # we have. At present, this is defined as the entry that
492: # DNS has for us. If by some chance we are not able to get a
493: # DNS translation for us, then we assume that the host.tab file
494: # is correct.
495: # BUGBUGBUG - in the future, we really should see if we can
496: # easily query the interface(s) instead.
497: # Parameter(s):
498: # contents - The contents of the host.tab to check.
499: # Returns:
500: # newcontents - The adjusted contents.
501: #
502: #
503: sub AdjustHostContents {
504: my $contents = shift;
505: my $adjusted;
506: my $me = $perlvar{'lonHostID'};
507:
1.354 albertel 508: foreach my $line (split(/\n/,$contents)) {
1.157 foxr 509: if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/))) {
510: chomp($line);
511: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
512: if ($id eq $me) {
1.354 albertel 513: my $ip = gethostbyname($name);
514: my $ipnew = inet_ntoa($ip);
515: $ip = $ipnew;
1.157 foxr 516: # Reconstruct the host line and append to adjusted:
517:
1.354 albertel 518: my $newline = "$id:$domain:$role:$name:$ip";
519: if($maxcon ne "") { # Not all hosts have loncnew tuning params
520: $newline .= ":$maxcon:$idleto:$mincon";
521: }
522: $adjusted .= $newline."\n";
1.157 foxr 523:
1.354 albertel 524: } else { # Not me, pass unmodified.
525: $adjusted .= $line."\n";
526: }
1.157 foxr 527: } else { # Blank or comment never re-written.
528: $adjusted .= $line."\n"; # Pass blanks and comments as is.
529: }
1.354 albertel 530: }
531: return $adjusted;
1.157 foxr 532: }
1.143 foxr 533: #
534: # InstallFile: Called to install an administrative file:
1.412 foxr 535: # - The file is created int a temp directory called <name>.tmp
536: # - lcinstall file is called to install the file.
537: # since the web app has no direct write access to the table directory
1.143 foxr 538: #
539: # Parameters:
540: # Name of the file
541: # File Contents.
542: # Return:
543: # nonzero - success.
544: # 0 - failure and $! has an errno.
1.412 foxr 545: # Assumptions:
546: # File installtion is a relatively infrequent
1.143 foxr 547: #
548: sub InstallFile {
1.192 foxr 549:
550: my ($Filename, $Contents) = @_;
1.412 foxr 551: # my $TempFile = $Filename.".tmp";
552: my $exedir = $perlvar{'lonDaemons'};
553: my $tmpdir = $exedir.'/tmp/';
554: my $TempFile = $tmpdir."TempTableFile.tmp";
1.143 foxr 555:
556: # Open the file for write:
557:
558: my $fh = IO::File->new("> $TempFile"); # Write to temp.
559: if(!(defined $fh)) {
560: &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
561: return 0;
562: }
563: # write the contents of the file:
564:
565: print $fh ($Contents);
566: $fh->close; # In case we ever have a filesystem w. locking
567:
1.412 foxr 568: chmod(0664, $TempFile); # Everyone can write it.
569:
570: # Use lcinstall file to put the file in the table directory...
571:
572: &Debug("Opening pipe to $exedir/lcinstallfile $TempFile $Filename");
573: my $pf = IO::File->new("| $exedir/lcinstallfile $TempFile $Filename > $exedir/logs/lcinstallfile.log");
574: close $pf;
575: my $err = $?;
576: &Debug("Status is $err");
577: if ($err != 0) {
578: my $msg = $err;
579: if ($err < @installerrors) {
580: $msg = $installerrors[$err];
581: }
582: &logthis("Install failed for table file $Filename : $msg");
583: return 0;
584: }
585:
586: # Remove the temp file:
1.143 foxr 587:
1.412 foxr 588: unlink($TempFile);
1.143 foxr 589:
590: return 1;
591: }
1.200 matthew 592:
593:
1.169 foxr 594: #
595: # ConfigFileFromSelector: converts a configuration file selector
1.411 foxr 596: # into a configuration file pathname.
597: # It's probably no longer necessary to preserve
598: # special handling of hosts or domain as those
599: # files have been superceded by dns_hosts, dns_domain.
600: # The default action is just to prepend the directory
601: # and append .tab
602: #
1.169 foxr 603: #
604: # Parameters:
605: # selector - Configuration file selector.
606: # Returns:
607: # Full path to the file or undef if the selector is invalid.
608: #
609: sub ConfigFileFromSelector {
610: my $selector = shift;
611: my $tablefile;
612:
613: my $tabledir = $perlvar{'lonTabDir'}.'/';
614: if ($selector eq "hosts") {
615: $tablefile = $tabledir."hosts.tab";
616: } elsif ($selector eq "domain") {
617: $tablefile = $tabledir."domain.tab";
618: } else {
1.411 foxr 619: $tablefile = $tabledir.$selector.'.tab';
1.169 foxr 620: }
621: return $tablefile;
1.143 foxr 622:
1.169 foxr 623: }
1.143 foxr 624: #
1.141 foxr 625: # PushFile: Called to do an administrative push of a file.
626: # - Ensure the file being pushed is one we support.
627: # - Backup the old file to <filename.saved>
628: # - Separate the contents of the new file out from the
629: # rest of the request.
630: # - Write the new file.
631: # Parameter:
632: # Request - The entire user request. This consists of a : separated
633: # string pushfile:tablename:contents.
634: # NOTE: The contents may have :'s in it as well making things a bit
635: # more interesting... but not much.
636: # Returns:
637: # String to send to client ("ok" or "refused" if bad file).
638: #
639: sub PushFile {
640: my $request = shift;
641: my ($command, $filename, $contents) = split(":", $request, 3);
1.412 foxr 642: &Debug("PushFile");
1.141 foxr 643:
644: # At this point in time, pushes for only the following tables are
645: # supported:
646: # hosts.tab ($filename eq host).
647: # domain.tab ($filename eq domain).
648: # Construct the destination filename or reject the request.
649: #
650: # lonManage is supposed to ensure this, however this session could be
651: # part of some elaborate spoof that managed somehow to authenticate.
652: #
653:
1.169 foxr 654:
655: my $tablefile = ConfigFileFromSelector($filename);
656: if(! (defined $tablefile)) {
1.141 foxr 657: return "refused";
658: }
1.412 foxr 659:
1.157 foxr 660: # If the file being pushed is the host file, we adjust the entry for ourself so that the
661: # IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible
662: # to conceive of conditions where we don't have a DNS entry locally. This is possible in a
663: # network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
664: # that possibilty.
665:
666: if($filename eq "host") {
667: $contents = AdjustHostContents($contents);
668: }
669:
1.141 foxr 670: # Install the new file:
671:
1.412 foxr 672: &logthis("Installing new $tablefile contents:\n$contents");
1.143 foxr 673: if(!InstallFile($tablefile, $contents)) {
674: &logthis('<font color="red"> Pushfile: unable to install '
1.145 foxr 675: .$tablefile." $! </font>");
1.143 foxr 676: return "error:$!";
1.224 foxr 677: } else {
1.143 foxr 678: &logthis('<font color="green"> Installed new '.$tablefile
679: ."</font>");
680:
681: }
682:
1.141 foxr 683:
684: # Indicate success:
685:
686: return "ok";
687:
688: }
1.145 foxr 689:
690: #
691: # Called to re-init either lonc or lond.
692: #
693: # Parameters:
694: # request - The full request by the client. This is of the form
695: # reinit:<process>
696: # where <process> is allowed to be either of
697: # lonc or lond
698: #
699: # Returns:
700: # The string to be sent back to the client either:
701: # ok - Everything worked just fine.
702: # error:why - There was a failure and why describes the reason.
703: #
704: #
705: sub ReinitProcess {
706: my $request = shift;
707:
1.146 foxr 708:
709: # separate the request (reinit) from the process identifier and
710: # validate it producing the name of the .pid file for the process.
711: #
712: #
713: my ($junk, $process) = split(":", $request);
1.147 foxr 714: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
1.146 foxr 715: if($process eq 'lonc') {
716: $processpidfile = $processpidfile."lonc.pid";
1.147 foxr 717: if (!open(PIDFILE, "< $processpidfile")) {
718: return "error:Open failed for $processpidfile";
719: }
720: my $loncpid = <PIDFILE>;
721: close(PIDFILE);
722: logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
723: ."</font>");
724: kill("USR2", $loncpid);
1.146 foxr 725: } elsif ($process eq 'lond') {
1.147 foxr 726: logthis('<font color="red"> Reinitializing self (lond) </font>');
727: &UpdateHosts; # Lond is us!!
1.146 foxr 728: } else {
729: &logthis('<font color="yellow" Invalid reinit request for '.$process
730: ."</font>");
731: return "error:Invalid process identifier $process";
732: }
1.145 foxr 733: return 'ok';
734: }
1.168 foxr 735: # Validate a line in a configuration file edit script:
736: # Validation includes:
737: # - Ensuring the command is valid.
738: # - Ensuring the command has sufficient parameters
739: # Parameters:
740: # scriptline - A line to validate (\n has been stripped for what it's worth).
1.167 foxr 741: #
1.168 foxr 742: # Return:
743: # 0 - Invalid scriptline.
744: # 1 - Valid scriptline
745: # NOTE:
746: # Only the command syntax is checked, not the executability of the
747: # command.
748: #
749: sub isValidEditCommand {
750: my $scriptline = shift;
751:
752: # Line elements are pipe separated:
753:
754: my ($command, $key, $newline) = split(/\|/, $scriptline);
755: &logthis('<font color="green"> isValideditCommand checking: '.
756: "Command = '$command', Key = '$key', Newline = '$newline' </font>\n");
757:
758: if ($command eq "delete") {
759: #
760: # key with no newline.
761: #
762: if( ($key eq "") || ($newline ne "")) {
763: return 0; # Must have key but no newline.
764: } else {
765: return 1; # Valid syntax.
766: }
1.169 foxr 767: } elsif ($command eq "replace") {
1.168 foxr 768: #
769: # key and newline:
770: #
771: if (($key eq "") || ($newline eq "")) {
772: return 0;
773: } else {
774: return 1;
775: }
1.169 foxr 776: } elsif ($command eq "append") {
777: if (($key ne "") && ($newline eq "")) {
778: return 1;
779: } else {
780: return 0;
781: }
1.168 foxr 782: } else {
783: return 0; # Invalid command.
784: }
785: return 0; # Should not get here!!!
786: }
1.169 foxr 787: #
788: # ApplyEdit - Applies an edit command to a line in a configuration
789: # file. It is the caller's responsiblity to validate the
790: # edit line.
791: # Parameters:
792: # $directive - A single edit directive to apply.
793: # Edit directives are of the form:
794: # append|newline - Appends a new line to the file.
795: # replace|key|newline - Replaces the line with key value 'key'
796: # delete|key - Deletes the line with key value 'key'.
797: # $editor - A config file editor object that contains the
798: # file being edited.
799: #
800: sub ApplyEdit {
1.192 foxr 801:
802: my ($directive, $editor) = @_;
1.169 foxr 803:
804: # Break the directive down into its command and its parameters
805: # (at most two at this point. The meaning of the parameters, if in fact
806: # they exist depends on the command).
807:
808: my ($command, $p1, $p2) = split(/\|/, $directive);
809:
810: if($command eq "append") {
811: $editor->Append($p1); # p1 - key p2 null.
812: } elsif ($command eq "replace") {
813: $editor->ReplaceLine($p1, $p2); # p1 - key p2 = newline.
814: } elsif ($command eq "delete") {
815: $editor->DeleteLine($p1); # p1 - key p2 null.
816: } else { # Should not get here!!!
817: die "Invalid command given to ApplyEdit $command"
818: }
819: }
820: #
821: # AdjustOurHost:
822: # Adjusts a host file stored in a configuration file editor object
823: # for the true IP address of this host. This is necessary for hosts
824: # that live behind a firewall.
825: # Those hosts have a publicly distributed IP of the firewall, but
826: # internally must use their actual IP. We assume that a given
827: # host only has a single IP interface for now.
828: # Formal Parameters:
829: # editor - The configuration file editor to adjust. This
830: # editor is assumed to contain a hosts.tab file.
831: # Strategy:
832: # - Figure out our hostname.
833: # - Lookup the entry for this host.
834: # - Modify the line to contain our IP
835: # - Do a replace for this host.
836: sub AdjustOurHost {
837: my $editor = shift;
838:
839: # figure out who I am.
840:
841: my $myHostName = $perlvar{'lonHostID'}; # LonCAPA hostname.
842:
843: # Get my host file entry.
844:
845: my $ConfigLine = $editor->Find($myHostName);
846: if(! (defined $ConfigLine)) {
847: die "AdjustOurHost - no entry for me in hosts file $myHostName";
848: }
849: # figure out my IP:
850: # Use the config line to get my hostname.
851: # Use gethostbyname to translate that into an IP address.
852: #
1.338 albertel 853: my ($id,$domain,$role,$name,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);
1.169 foxr 854: #
855: # Reassemble the config line from the elements in the list.
856: # Note that if the loncnew items were not present before, they will
857: # be now even if they would be empty
858: #
859: my $newConfigLine = $id;
1.338 albertel 860: foreach my $item ($domain, $role, $name, $maxcon, $idleto, $mincon) {
1.169 foxr 861: $newConfigLine .= ":".$item;
862: }
863: # Replace the line:
864:
865: $editor->ReplaceLine($id, $newConfigLine);
866:
867: }
868: #
869: # ReplaceConfigFile:
870: # Replaces a configuration file with the contents of a
871: # configuration file editor object.
872: # This is done by:
873: # - Copying the target file to <filename>.old
874: # - Writing the new file to <filename>.tmp
875: # - Moving <filename.tmp> -> <filename>
876: # This laborious process ensures that the system is never without
877: # a configuration file that's at least valid (even if the contents
878: # may be dated).
879: # Parameters:
880: # filename - Name of the file to modify... this is a full path.
881: # editor - Editor containing the file.
882: #
883: sub ReplaceConfigFile {
1.192 foxr 884:
885: my ($filename, $editor) = @_;
1.168 foxr 886:
1.169 foxr 887: CopyFile ($filename, $filename.".old");
888:
889: my $contents = $editor->Get(); # Get the contents of the file.
890:
891: InstallFile($filename, $contents);
892: }
1.168 foxr 893: #
894: #
895: # Called to edit a configuration table file
1.167 foxr 896: # Parameters:
897: # request - The entire command/request sent by lonc or lonManage
898: # Return:
899: # The reply to send to the client.
1.168 foxr 900: #
1.167 foxr 901: sub EditFile {
902: my $request = shift;
903:
904: # Split the command into it's pieces: edit:filetype:script
905:
1.339 albertel 906: my ($cmd, $filetype, $script) = split(/:/, $request,3); # : in script
1.167 foxr 907:
908: # Check the pre-coditions for success:
909:
1.339 albertel 910: if($cmd != "edit") { # Something is amiss afoot alack.
1.167 foxr 911: return "error:edit request detected, but request != 'edit'\n";
912: }
913: if( ($filetype ne "hosts") &&
914: ($filetype ne "domain")) {
915: return "error:edit requested with invalid file specifier: $filetype \n";
916: }
917:
918: # Split the edit script and check it's validity.
1.168 foxr 919:
920: my @scriptlines = split(/\n/, $script); # one line per element.
921: my $linecount = scalar(@scriptlines);
922: for(my $i = 0; $i < $linecount; $i++) {
923: chomp($scriptlines[$i]);
924: if(!isValidEditCommand($scriptlines[$i])) {
925: return "error:edit with bad script line: '$scriptlines[$i]' \n";
926: }
927: }
1.145 foxr 928:
1.167 foxr 929: # Execute the edit operation.
1.169 foxr 930: # - Create a config file editor for the appropriate file and
931: # - execute each command in the script:
932: #
933: my $configfile = ConfigFileFromSelector($filetype);
934: if (!(defined $configfile)) {
935: return "refused\n";
936: }
937: my $editor = ConfigFileEdit->new($configfile);
1.167 foxr 938:
1.169 foxr 939: for (my $i = 0; $i < $linecount; $i++) {
940: ApplyEdit($scriptlines[$i], $editor);
941: }
942: # If the file is the host file, ensure that our host is
943: # adjusted to have our ip:
944: #
945: if($filetype eq "host") {
946: AdjustOurHost($editor);
947: }
948: # Finally replace the current file with our file.
949: #
950: ReplaceConfigFile($configfile, $editor);
1.167 foxr 951:
952: return "ok\n";
953: }
1.207 foxr 954:
1.255 foxr 955: # read_profile
956: #
957: # Returns a set of specific entries from a user's profile file.
958: # this is a utility function that is used by both get_profile_entry and
959: # get_profile_entry_encrypted.
960: #
961: # Parameters:
962: # udom - Domain in which the user exists.
963: # uname - User's account name (loncapa account)
964: # namespace - The profile namespace to open.
965: # what - A set of & separated queries.
966: # Returns:
967: # If all ok: - The string that needs to be shipped back to the user.
968: # If failure - A string that starts with error: followed by the failure
969: # reason.. note that this probabyl gets shipped back to the
970: # user as well.
971: #
972: sub read_profile {
973: my ($udom, $uname, $namespace, $what) = @_;
974:
975: my $hashref = &tie_user_hash($udom, $uname, $namespace,
976: &GDBM_READER());
977: if ($hashref) {
978: my @queries=split(/\&/,$what);
979: my $qresult='';
980:
981: for (my $i=0;$i<=$#queries;$i++) {
982: $qresult.="$hashref->{$queries[$i]}&"; # Presumably failure gives empty string.
983: }
984: $qresult=~s/\&$//; # Remove trailing & from last lookup.
1.311 albertel 985: if (&untie_user_hash($hashref)) {
1.255 foxr 986: return $qresult;
987: } else {
988: return "error: ".($!+0)." untie (GDBM) Failed";
989: }
990: } else {
991: if ($!+0 == 2) {
992: return "error:No such file or GDBM reported bad block error";
993: } else {
994: return "error: ".($!+0)." tie (GDBM) Failed";
995: }
996: }
997:
998: }
1.214 foxr 999: #--------------------- Request Handlers --------------------------------------------
1000: #
1.215 foxr 1001: # By convention each request handler registers itself prior to the sub
1002: # declaration:
1.214 foxr 1003: #
1004:
1.216 foxr 1005: #++
1006: #
1.214 foxr 1007: # Handles ping requests.
1008: # Parameters:
1009: # $cmd - the actual keyword that invoked us.
1010: # $tail - the tail of the request that invoked us.
1011: # $replyfd- File descriptor connected to the client
1012: # Implicit Inputs:
1013: # $currenthostid - Global variable that carries the name of the host we are
1014: # known as.
1015: # Returns:
1016: # 1 - Ok to continue processing.
1017: # 0 - Program should exit.
1018: # Side effects:
1019: # Reply information is sent to the client.
1020: sub ping_handler {
1021: my ($cmd, $tail, $client) = @_;
1022: Debug("$cmd $tail $client .. $currenthostid:");
1023:
1.387 albertel 1024: Reply( $client,\$currenthostid,"$cmd:$tail");
1.214 foxr 1025:
1026: return 1;
1027: }
1028: ®ister_handler("ping", \&ping_handler, 0, 1, 1); # Ping unencoded, client or manager.
1029:
1.216 foxr 1030: #++
1.215 foxr 1031: #
1032: # Handles pong requests. Pong replies with our current host id, and
1033: # the results of a ping sent to us via our lonc.
1034: #
1035: # Parameters:
1036: # $cmd - the actual keyword that invoked us.
1037: # $tail - the tail of the request that invoked us.
1038: # $replyfd- File descriptor connected to the client
1039: # Implicit Inputs:
1040: # $currenthostid - Global variable that carries the name of the host we are
1041: # connected to.
1042: # Returns:
1043: # 1 - Ok to continue processing.
1044: # 0 - Program should exit.
1045: # Side effects:
1046: # Reply information is sent to the client.
1047: sub pong_handler {
1048: my ($cmd, $tail, $replyfd) = @_;
1049:
1.365 albertel 1050: my $reply=&Apache::lonnet::reply("ping",$clientname);
1.215 foxr 1051: &Reply( $replyfd, "$currenthostid:$reply\n", "$cmd:$tail");
1052: return 1;
1053: }
1054: ®ister_handler("pong", \&pong_handler, 0, 1, 1); # Pong unencoded, client or manager
1055:
1.216 foxr 1056: #++
1057: # Called to establish an encrypted session key with the remote client.
1058: # Note that with secure lond, in most cases this function is never
1059: # invoked. Instead, the secure session key is established either
1060: # via a local file that's locked down tight and only lives for a short
1061: # time, or via an ssl tunnel...and is generated from a bunch-o-random
1062: # bits from /dev/urandom, rather than the predictable pattern used by
1063: # by this sub. This sub is only used in the old-style insecure
1064: # key negotiation.
1065: # Parameters:
1066: # $cmd - the actual keyword that invoked us.
1067: # $tail - the tail of the request that invoked us.
1068: # $replyfd- File descriptor connected to the client
1069: # Implicit Inputs:
1070: # $currenthostid - Global variable that carries the name of the host
1071: # known as.
1072: # $clientname - Global variable that carries the name of the hsot we're connected to.
1073: # Returns:
1074: # 1 - Ok to continue processing.
1075: # 0 - Program should exit.
1076: # Implicit Outputs:
1077: # Reply information is sent to the client.
1078: # $cipher is set with a reference to a new IDEA encryption object.
1079: #
1080: sub establish_key_handler {
1081: my ($cmd, $tail, $replyfd) = @_;
1082:
1083: my $buildkey=time.$$.int(rand 100000);
1084: $buildkey=~tr/1-6/A-F/;
1085: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
1086: my $key=$currenthostid.$clientname;
1087: $key=~tr/a-z/A-Z/;
1088: $key=~tr/G-P/0-9/;
1089: $key=~tr/Q-Z/0-9/;
1090: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
1091: $key=substr($key,0,32);
1092: my $cipherkey=pack("H32",$key);
1093: $cipher=new IDEA $cipherkey;
1.387 albertel 1094: &Reply($replyfd, \$buildkey, "$cmd:$tail");
1.216 foxr 1095:
1096: return 1;
1097:
1098: }
1099: ®ister_handler("ekey", \&establish_key_handler, 0, 1,1);
1100:
1.217 foxr 1101: # Handler for the load command. Returns the current system load average
1102: # to the requestor.
1103: #
1104: # Parameters:
1105: # $cmd - the actual keyword that invoked us.
1106: # $tail - the tail of the request that invoked us.
1107: # $replyfd- File descriptor connected to the client
1108: # Implicit Inputs:
1109: # $currenthostid - Global variable that carries the name of the host
1110: # known as.
1111: # $clientname - Global variable that carries the name of the hsot we're connected to.
1112: # Returns:
1113: # 1 - Ok to continue processing.
1114: # 0 - Program should exit.
1115: # Side effects:
1116: # Reply information is sent to the client.
1117: sub load_handler {
1118: my ($cmd, $tail, $replyfd) = @_;
1119:
1120: # Get the load average from /proc/loadavg and calculate it as a percentage of
1121: # the allowed load limit as set by the perl global variable lonLoadLim
1122:
1123: my $loadavg;
1124: my $loadfile=IO::File->new('/proc/loadavg');
1125:
1126: $loadavg=<$loadfile>;
1127: $loadavg =~ s/\s.*//g; # Extract the first field only.
1128:
1129: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1130:
1.387 albertel 1131: &Reply( $replyfd, \$loadpercent, "$cmd:$tail");
1.217 foxr 1132:
1133: return 1;
1134: }
1.263 albertel 1135: ®ister_handler("load", \&load_handler, 0, 1, 0);
1.217 foxr 1136:
1137: #
1138: # Process the userload request. This sub returns to the client the current
1139: # user load average. It can be invoked either by clients or managers.
1140: #
1141: # Parameters:
1142: # $cmd - the actual keyword that invoked us.
1143: # $tail - the tail of the request that invoked us.
1144: # $replyfd- File descriptor connected to the client
1145: # Implicit Inputs:
1146: # $currenthostid - Global variable that carries the name of the host
1147: # known as.
1148: # $clientname - Global variable that carries the name of the hsot we're connected to.
1149: # Returns:
1150: # 1 - Ok to continue processing.
1151: # 0 - Program should exit
1152: # Implicit inputs:
1153: # whatever the userload() function requires.
1154: # Implicit outputs:
1155: # the reply is written to the client.
1156: #
1157: sub user_load_handler {
1158: my ($cmd, $tail, $replyfd) = @_;
1159:
1.365 albertel 1160: my $userloadpercent=&Apache::lonnet::userload();
1.387 albertel 1161: &Reply($replyfd, \$userloadpercent, "$cmd:$tail");
1.217 foxr 1162:
1163: return 1;
1164: }
1.263 albertel 1165: ®ister_handler("userload", \&user_load_handler, 0, 1, 0);
1.217 foxr 1166:
1.218 foxr 1167: # Process a request for the authorization type of a user:
1168: # (userauth).
1169: #
1170: # Parameters:
1171: # $cmd - the actual keyword that invoked us.
1172: # $tail - the tail of the request that invoked us.
1173: # $replyfd- File descriptor connected to the client
1174: # Returns:
1175: # 1 - Ok to continue processing.
1176: # 0 - Program should exit
1177: # Implicit outputs:
1178: # The user authorization type is written to the client.
1179: #
1180: sub user_authorization_type {
1181: my ($cmd, $tail, $replyfd) = @_;
1182:
1183: my $userinput = "$cmd:$tail";
1184:
1185: # Pull the domain and username out of the command tail.
1.222 foxr 1186: # and call get_auth_type to determine the authentication type.
1.218 foxr 1187:
1188: my ($udom,$uname)=split(/:/,$tail);
1.222 foxr 1189: my $result = &get_auth_type($udom, $uname);
1.218 foxr 1190: if($result eq "nouser") {
1191: &Failure( $replyfd, "unknown_user\n", $userinput);
1192: } else {
1193: #
1.222 foxr 1194: # We only want to pass the second field from get_auth_type
1.218 foxr 1195: # for ^krb.. otherwise we'll be handing out the encrypted
1196: # password for internals e.g.
1197: #
1198: my ($type,$otherinfo) = split(/:/,$result);
1199: if($type =~ /^krb/) {
1200: $type = $result;
1.269 raeburn 1201: } else {
1202: $type .= ':';
1203: }
1.387 albertel 1204: &Reply( $replyfd, \$type, $userinput);
1.218 foxr 1205: }
1206:
1207: return 1;
1208: }
1209: ®ister_handler("currentauth", \&user_authorization_type, 1, 1, 0);
1210:
1211: # Process a request by a manager to push a hosts or domain table
1212: # to us. We pick apart the command and pass it on to the subs
1213: # that already exist to do this.
1214: #
1215: # Parameters:
1216: # $cmd - the actual keyword that invoked us.
1217: # $tail - the tail of the request that invoked us.
1218: # $client - File descriptor connected to the client
1219: # Returns:
1220: # 1 - Ok to continue processing.
1221: # 0 - Program should exit
1222: # Implicit Output:
1223: # a reply is written to the client.
1224: sub push_file_handler {
1225: my ($cmd, $tail, $client) = @_;
1.412 foxr 1226: &Debug("In push file handler");
1.218 foxr 1227: my $userinput = "$cmd:$tail";
1228:
1229: # At this time we only know that the IP of our partner is a valid manager
1230: # the code below is a hook to do further authentication (e.g. to resolve
1231: # spoofing).
1232:
1233: my $cert = &GetCertificate($userinput);
1.412 foxr 1234: if(&ValidManager($cert)) {
1235: &Debug("Valid manager: $client");
1.218 foxr 1236:
1237: # Now presumably we have the bona fides of both the peer host and the
1238: # process making the request.
1239:
1240: my $reply = &PushFile($userinput);
1.387 albertel 1241: &Reply($client, \$reply, $userinput);
1.218 foxr 1242:
1243: } else {
1.412 foxr 1244: &logthis("push_file_handler $client is not valid");
1.218 foxr 1245: &Failure( $client, "refused\n", $userinput);
1246: }
1.219 foxr 1247: return 1;
1.218 foxr 1248: }
1249: ®ister_handler("pushfile", \&push_file_handler, 1, 0, 1);
1250:
1.399 raeburn 1251: # The du_handler routine should be considered obsolete and is retained
1252: # for communication with legacy servers. Please see the du2_handler.
1.243 banghart 1253: #
1.399 raeburn 1254: # du - list the disk usage of a directory recursively.
1.243 banghart 1255: #
1256: # note: stolen code from the ls file handler
1257: # under construction by Rick Banghart
1258: # .
1259: # Parameters:
1260: # $cmd - The command that dispatched us (du).
1261: # $ududir - The directory path to list... I'm not sure what this
1262: # is relative as things like ls:. return e.g.
1263: # no_such_dir.
1264: # $client - Socket open on the client.
1265: # Returns:
1266: # 1 - indicating that the daemon should not disconnect.
1267: # Side Effects:
1268: # The reply is written to $client.
1269: #
1270: sub du_handler {
1271: my ($cmd, $ududir, $client) = @_;
1.339 albertel 1272: ($ududir) = split(/:/,$ududir); # Make 'telnet' testing easier.
1.251 foxr 1273: my $userinput = "$cmd:$ududir";
1274:
1.245 albertel 1275: if ($ududir=~/\.\./ || $ududir!~m|^/home/httpd/|) {
1276: &Failure($client,"refused\n","$cmd:$ududir");
1277: return 1;
1278: }
1.249 foxr 1279: # Since $ududir could have some nasties in it,
1280: # we will require that ududir is a valid
1281: # directory. Just in case someone tries to
1282: # slip us a line like .;(cd /home/httpd rm -rf*)
1283: # etc.
1284: #
1285: if (-d $ududir) {
1.292 albertel 1286: my $total_size=0;
1287: my $code=sub {
1288: if ($_=~/\.\d+\./) { return;}
1289: if ($_=~/\.meta$/) { return;}
1.362 albertel 1290: if (-d $_) { return;}
1.292 albertel 1291: $total_size+=(stat($_))[7];
1292: };
1.295 raeburn 1293: chdir($ududir);
1.292 albertel 1294: find($code,$ududir);
1295: $total_size=int($total_size/1024);
1.387 albertel 1296: &Reply($client,\$total_size,"$cmd:$ududir");
1.249 foxr 1297: } else {
1.251 foxr 1298: &Failure($client, "bad_directory:$ududir\n","$cmd:$ududir");
1.249 foxr 1299: }
1.243 banghart 1300: return 1;
1301: }
1302: ®ister_handler("du", \&du_handler, 0, 1, 0);
1.218 foxr 1303:
1.399 raeburn 1304: # Please also see the du_handler, which is obsoleted by du2.
1305: # du2_handler differs from du_handler in that required path to directory
1306: # provided by &propath() is prepended in the handler instead of on the
1307: # client side.
1.239 foxr 1308: #
1.399 raeburn 1309: # du2 - list the disk usage of a directory recursively.
1310: #
1311: # Parameters:
1312: # $cmd - The command that dispatched us (du).
1313: # $tail - The tail of the request that invoked us.
1314: # $tail is a : separated list of the following:
1315: # - $ududir - directory path to list (before prepending)
1316: # - $getpropath = 1 if &propath() should prepend
1317: # - $uname - username to use for &propath or user dir
1318: # - $udom - domain to use for &propath or user dir
1319: # All are escaped.
1320: # $client - Socket open on the client.
1321: # Returns:
1322: # 1 - indicating that the daemon should not disconnect.
1323: # Side Effects:
1324: # The reply is written to $client.
1325: #
1326:
1327: sub du2_handler {
1328: my ($cmd, $tail, $client) = @_;
1329: my ($ududir,$getpropath,$uname,$udom) = map { &unescape($_) } (split(/:/, $tail));
1330: my $userinput = "$cmd:$tail";
1331: if (($ududir=~/\.\./) || (($ududir!~m|^/home/httpd/|) && (!$getpropath))) {
1332: &Failure($client,"refused\n","$cmd:$tail");
1333: return 1;
1334: }
1335: if ($getpropath) {
1336: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
1337: $ududir = &propath($udom,$uname).'/'.$ududir;
1338: } else {
1339: &Failure($client,"refused\n","$cmd:$tail");
1340: return 1;
1341: }
1342: }
1343: # Since $ududir could have some nasties in it,
1344: # we will require that ududir is a valid
1345: # directory. Just in case someone tries to
1346: # slip us a line like .;(cd /home/httpd rm -rf*)
1347: # etc.
1348: #
1349: if (-d $ududir) {
1350: my $total_size=0;
1351: my $code=sub {
1352: if ($_=~/\.\d+\./) { return;}
1353: if ($_=~/\.meta$/) { return;}
1354: if (-d $_) { return;}
1355: $total_size+=(stat($_))[7];
1356: };
1357: chdir($ududir);
1358: find($code,$ududir);
1359: $total_size=int($total_size/1024);
1360: &Reply($client,\$total_size,"$cmd:$ududir");
1361: } else {
1362: &Failure($client, "bad_directory:$ududir\n","$cmd:$tail");
1363: }
1364: return 1;
1365: }
1366: ®ister_handler("du2", \&du2_handler, 0, 1, 0);
1367:
1368: #
1369: # The ls_handler routine should be considered obsolete and is retained
1370: # for communication with legacy servers. Please see the ls3_handler.
1.280 matthew 1371: #
1.239 foxr 1372: # ls - list the contents of a directory. For each file in the
1373: # selected directory the filename followed by the full output of
1374: # the stat function is returned. The returned info for each
1375: # file are separated by ':'. The stat fields are separated by &'s.
1376: # Parameters:
1377: # $cmd - The command that dispatched us (ls).
1378: # $ulsdir - The directory path to list... I'm not sure what this
1379: # is relative as things like ls:. return e.g.
1380: # no_such_dir.
1381: # $client - Socket open on the client.
1382: # Returns:
1383: # 1 - indicating that the daemon should not disconnect.
1384: # Side Effects:
1385: # The reply is written to $client.
1386: #
1387: sub ls_handler {
1.280 matthew 1388: # obsoleted by ls2_handler
1.239 foxr 1389: my ($cmd, $ulsdir, $client) = @_;
1390:
1391: my $userinput = "$cmd:$ulsdir";
1392:
1393: my $obs;
1394: my $rights;
1395: my $ulsout='';
1396: my $ulsfn;
1397: if (-e $ulsdir) {
1398: if(-d $ulsdir) {
1399: if (opendir(LSDIR,$ulsdir)) {
1400: while ($ulsfn=readdir(LSDIR)) {
1.291 albertel 1401: undef($obs);
1402: undef($rights);
1.239 foxr 1403: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1404: #We do some obsolete checking here
1405: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1406: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1407: my @obsolete=<FILE>;
1408: foreach my $obsolete (@obsolete) {
1.301 www 1409: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1.239 foxr 1410: if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
1411: }
1412: }
1413: $ulsout.=$ulsfn.'&'.join('&',@ulsstats);
1414: if($obs eq '1') { $ulsout.="&1"; }
1415: else { $ulsout.="&0"; }
1416: if($rights eq '1') { $ulsout.="&1:"; }
1417: else { $ulsout.="&0:"; }
1418: }
1419: closedir(LSDIR);
1420: }
1421: } else {
1422: my @ulsstats=stat($ulsdir);
1423: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1424: }
1425: } else {
1426: $ulsout='no_such_dir';
1427: }
1428: if ($ulsout eq '') { $ulsout='empty'; }
1.387 albertel 1429: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1.239 foxr 1430:
1431: return 1;
1432:
1433: }
1434: ®ister_handler("ls", \&ls_handler, 0, 1, 0);
1435:
1.399 raeburn 1436: # The ls2_handler routine should be considered obsolete and is retained
1437: # for communication with legacy servers. Please see the ls3_handler.
1438: # Please also see the ls_handler, which was itself obsoleted by ls2.
1.280 matthew 1439: # ls2_handler differs from ls_handler in that it escapes its return
1440: # values before concatenating them together with ':'s.
1441: #
1442: # ls2 - list the contents of a directory. For each file in the
1443: # selected directory the filename followed by the full output of
1444: # the stat function is returned. The returned info for each
1445: # file are separated by ':'. The stat fields are separated by &'s.
1446: # Parameters:
1447: # $cmd - The command that dispatched us (ls).
1448: # $ulsdir - The directory path to list... I'm not sure what this
1449: # is relative as things like ls:. return e.g.
1450: # no_such_dir.
1451: # $client - Socket open on the client.
1452: # Returns:
1453: # 1 - indicating that the daemon should not disconnect.
1454: # Side Effects:
1455: # The reply is written to $client.
1456: #
1457: sub ls2_handler {
1458: my ($cmd, $ulsdir, $client) = @_;
1459:
1460: my $userinput = "$cmd:$ulsdir";
1461:
1462: my $obs;
1463: my $rights;
1464: my $ulsout='';
1465: my $ulsfn;
1466: if (-e $ulsdir) {
1467: if(-d $ulsdir) {
1468: if (opendir(LSDIR,$ulsdir)) {
1469: while ($ulsfn=readdir(LSDIR)) {
1.291 albertel 1470: undef($obs);
1471: undef($rights);
1.280 matthew 1472: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1473: #We do some obsolete checking here
1474: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1475: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1476: my @obsolete=<FILE>;
1477: foreach my $obsolete (@obsolete) {
1.301 www 1478: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1.280 matthew 1479: if($obsolete =~ m|(<copyright>)(default)|) {
1480: $rights = 1;
1481: }
1482: }
1483: }
1484: my $tmp = $ulsfn.'&'.join('&',@ulsstats);
1485: if ($obs eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1486: if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1487: $ulsout.= &escape($tmp).':';
1488: }
1489: closedir(LSDIR);
1490: }
1491: } else {
1492: my @ulsstats=stat($ulsdir);
1493: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1494: }
1495: } else {
1496: $ulsout='no_such_dir';
1497: }
1498: if ($ulsout eq '') { $ulsout='empty'; }
1.387 albertel 1499: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1.280 matthew 1500: return 1;
1501: }
1502: ®ister_handler("ls2", \&ls2_handler, 0, 1, 0);
1.399 raeburn 1503: #
1504: # ls3 - list the contents of a directory. For each file in the
1505: # selected directory the filename followed by the full output of
1506: # the stat function is returned. The returned info for each
1507: # file are separated by ':'. The stat fields are separated by &'s.
1508: # Parameters:
1509: # $cmd - The command that dispatched us (ls).
1510: # $tail - The tail of the request that invoked us.
1511: # $tail is a : separated list of the following:
1512: # - $ulsdir - directory path to list (before prepending)
1513: # - $getpropath = 1 if &propath() should prepend
1514: # - $getuserdir = 1 if path to user dir in lonUsers should
1515: # prepend
1516: # - $alternate_root - path to prepend
1517: # - $uname - username to use for &propath or user dir
1518: # - $udom - domain to use for &propath or user dir
1519: # All of these except $getpropath and &getuserdir are escaped.
1520: # no_such_dir.
1521: # $client - Socket open on the client.
1522: # Returns:
1523: # 1 - indicating that the daemon should not disconnect.
1524: # Side Effects:
1525: # The reply is written to $client.
1526: #
1527:
1528: sub ls3_handler {
1529: my ($cmd, $tail, $client) = @_;
1530: my $userinput = "$cmd:$tail";
1531: my ($ulsdir,$getpropath,$getuserdir,$alternate_root,$uname,$udom) =
1532: split(/:/,$tail);
1533: if (defined($ulsdir)) {
1534: $ulsdir = &unescape($ulsdir);
1535: }
1536: if (defined($alternate_root)) {
1537: $alternate_root = &unescape($alternate_root);
1538: }
1539: if (defined($uname)) {
1540: $uname = &unescape($uname);
1541: }
1542: if (defined($udom)) {
1543: $udom = &unescape($udom);
1544: }
1545:
1546: my $dir_root = $perlvar{'lonDocRoot'};
1547: if ($getpropath) {
1548: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
1549: $dir_root = &propath($udom,$uname);
1550: $dir_root =~ s/\/$//;
1551: } else {
1552: &Failure($client,"refused\n","$cmd:$tail");
1553: return 1;
1554: }
1555: } elsif ($getuserdir) {
1556: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
1557: my $subdir=$uname.'__';
1558: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
1559: $dir_root = $Apache::lonnet::perlvar{'lonUsersDir'}
1560: ."/$udom/$subdir/$uname";
1561: } else {
1562: &Failure($client,"refused\n","$cmd:$tail");
1563: return 1;
1564: }
1.400 raeburn 1565: } elsif ($alternate_root ne '') {
1.399 raeburn 1566: $dir_root = $alternate_root;
1567: }
1.408 raeburn 1568: if (($dir_root ne '') && ($dir_root ne '/')) {
1.400 raeburn 1569: if ($ulsdir =~ /^\//) {
1570: $ulsdir = $dir_root.$ulsdir;
1571: } else {
1572: $ulsdir = $dir_root.'/'.$ulsdir;
1573: }
1.399 raeburn 1574: }
1575: my $obs;
1576: my $rights;
1577: my $ulsout='';
1578: my $ulsfn;
1579: if (-e $ulsdir) {
1580: if(-d $ulsdir) {
1581: if (opendir(LSDIR,$ulsdir)) {
1582: while ($ulsfn=readdir(LSDIR)) {
1583: undef($obs);
1584: undef($rights);
1585: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1586: #We do some obsolete checking here
1587: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1588: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1589: my @obsolete=<FILE>;
1590: foreach my $obsolete (@obsolete) {
1591: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
1592: if($obsolete =~ m|(<copyright>)(default)|) {
1593: $rights = 1;
1594: }
1595: }
1596: }
1597: my $tmp = $ulsfn.'&'.join('&',@ulsstats);
1598: if ($obs eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1599: if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
1600: $ulsout.= &escape($tmp).':';
1601: }
1602: closedir(LSDIR);
1603: }
1604: } else {
1605: my @ulsstats=stat($ulsdir);
1606: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1607: }
1608: } else {
1609: $ulsout='no_such_dir';
1.400 raeburn 1610: }
1611: if ($ulsout eq '') { $ulsout='empty'; }
1612: &Reply($client, \$ulsout, $userinput); # This supports debug logging.
1613: return 1;
1.399 raeburn 1614: }
1615: ®ister_handler("ls3", \&ls3_handler, 0, 1, 0);
1.280 matthew 1616:
1.410 raeburn 1617: sub server_timezone_handler {
1618: my ($cmd,$tail,$client) = @_;
1619: my $userinput = "$cmd:$tail";
1620: my $timezone;
1621: my $clockfile = '/etc/sysconfig/clock'; # Fedora/CentOS/SuSE
1622: my $tzfile = '/etc/timezone'; # Debian/Ubuntu
1623: if (-e $clockfile) {
1624: if (open(my $fh,"<$clockfile")) {
1625: while (<$fh>) {
1626: next if (/^[\#\s]/);
1627: if (/^(?:TIME)?ZONE\s*=\s*['"]?\s*([\w\/]+)/) {
1628: $timezone = $1;
1629: last;
1630: }
1631: }
1632: close($fh);
1633: }
1634: } elsif (-e $tzfile) {
1635: if (open(my $fh,"<$tzfile")) {
1636: $timezone = <$fh>;
1637: close($fh);
1638: chomp($timezone);
1639: if ($timezone =~ m{^Etc/(\w+)$}) {
1640: $timezone = $1;
1641: }
1642: }
1643: }
1644: &Reply($client,\$timezone,$userinput); # This supports debug logging.
1645: return 1;
1646: }
1647: ®ister_handler("servertimezone", \&server_timezone_handler, 0, 1, 0);
1648:
1.413 raeburn 1649: sub server_loncaparev_handler {
1650: my ($cmd,$tail,$client) = @_;
1651: my $userinput = "$cmd:$tail";
1652: &Reply($client,\$perlvar{'lonVersion'},$userinput);
1653: return 1;
1654: }
1655: ®ister_handler("serverloncaparev", \&server_loncaparev_handler, 0, 1, 0);
1656:
1.218 foxr 1657: # Process a reinit request. Reinit requests that either
1658: # lonc or lond be reinitialized so that an updated
1659: # host.tab or domain.tab can be processed.
1660: #
1661: # Parameters:
1662: # $cmd - the actual keyword that invoked us.
1663: # $tail - the tail of the request that invoked us.
1664: # $client - File descriptor connected to the client
1665: # Returns:
1666: # 1 - Ok to continue processing.
1667: # 0 - Program should exit
1668: # Implicit output:
1669: # a reply is sent to the client.
1670: #
1671: sub reinit_process_handler {
1672: my ($cmd, $tail, $client) = @_;
1673:
1674: my $userinput = "$cmd:$tail";
1675:
1676: my $cert = &GetCertificate($userinput);
1677: if(&ValidManager($cert)) {
1678: chomp($userinput);
1679: my $reply = &ReinitProcess($userinput);
1.387 albertel 1680: &Reply( $client, \$reply, $userinput);
1.218 foxr 1681: } else {
1682: &Failure( $client, "refused\n", $userinput);
1683: }
1684: return 1;
1685: }
1686: ®ister_handler("reinit", \&reinit_process_handler, 1, 0, 1);
1687:
1688: # Process the editing script for a table edit operation.
1689: # the editing operation must be encrypted and requested by
1690: # a manager host.
1691: #
1692: # Parameters:
1693: # $cmd - the actual keyword that invoked us.
1694: # $tail - the tail of the request that invoked us.
1695: # $client - File descriptor connected to the client
1696: # Returns:
1697: # 1 - Ok to continue processing.
1698: # 0 - Program should exit
1699: # Implicit output:
1700: # a reply is sent to the client.
1701: #
1702: sub edit_table_handler {
1703: my ($command, $tail, $client) = @_;
1704:
1705: my $userinput = "$command:$tail";
1706:
1707: my $cert = &GetCertificate($userinput);
1708: if(&ValidManager($cert)) {
1709: my($filetype, $script) = split(/:/, $tail);
1710: if (($filetype eq "hosts") ||
1711: ($filetype eq "domain")) {
1712: if($script ne "") {
1713: &Reply($client, # BUGBUG - EditFile
1714: &EditFile($userinput), # could fail.
1715: $userinput);
1716: } else {
1717: &Failure($client,"refused\n",$userinput);
1718: }
1719: } else {
1720: &Failure($client,"refused\n",$userinput);
1721: }
1722: } else {
1723: &Failure($client,"refused\n",$userinput);
1724: }
1725: return 1;
1726: }
1.263 albertel 1727: ®ister_handler("edit", \&edit_table_handler, 1, 0, 1);
1.218 foxr 1728:
1.220 foxr 1729: #
1730: # Authenticate a user against the LonCAPA authentication
1731: # database. Note that there are several authentication
1732: # possibilities:
1733: # - unix - The user can be authenticated against the unix
1734: # password file.
1735: # - internal - The user can be authenticated against a purely
1736: # internal per user password file.
1737: # - kerberos - The user can be authenticated against either a kerb4 or kerb5
1738: # ticket granting authority.
1739: # - user - The person tailoring LonCAPA can supply a user authentication
1740: # mechanism that is per system.
1741: #
1742: # Parameters:
1743: # $cmd - The command that got us here.
1744: # $tail - Tail of the command (remaining parameters).
1745: # $client - File descriptor connected to client.
1746: # Returns
1747: # 0 - Requested to exit, caller should shut down.
1748: # 1 - Continue processing.
1749: # Implicit inputs:
1750: # The authentication systems describe above have their own forms of implicit
1751: # input into the authentication process that are described above.
1752: #
1753: sub authenticate_handler {
1754: my ($cmd, $tail, $client) = @_;
1755:
1756:
1757: # Regenerate the full input line
1758:
1759: my $userinput = $cmd.":".$tail;
1760:
1761: # udom - User's domain.
1762: # uname - Username.
1763: # upass - User's password.
1.396 raeburn 1764: # checkdefauth - Pass to validate_user() to try authentication
1765: # with default auth type(s) if no user account.
1.220 foxr 1766:
1.396 raeburn 1767: my ($udom, $uname, $upass, $checkdefauth)=split(/:/,$tail);
1.399 raeburn 1768: &Debug(" Authenticate domain = $udom, user = $uname, password = $upass, checkdefauth = $checkdefauth");
1.220 foxr 1769: chomp($upass);
1770: $upass=&unescape($upass);
1771:
1.396 raeburn 1772: my $pwdcorrect = &validate_user($udom,$uname,$upass,$checkdefauth);
1.220 foxr 1773: if($pwdcorrect) {
1774: &Reply( $client, "authorized\n", $userinput);
1775: #
1776: # Bad credentials: Failed to authorize
1777: #
1778: } else {
1779: &Failure( $client, "non_authorized\n", $userinput);
1780: }
1781:
1782: return 1;
1783: }
1.263 albertel 1784: ®ister_handler("auth", \&authenticate_handler, 1, 1, 0);
1.214 foxr 1785:
1.222 foxr 1786: #
1787: # Change a user's password. Note that this function is complicated by
1788: # the fact that a user may be authenticated in more than one way:
1789: # At present, we are not able to change the password for all types of
1790: # authentication methods. Only for:
1791: # unix - unix password or shadow passoword style authentication.
1792: # local - Locally written authentication mechanism.
1793: # For now, kerb4 and kerb5 password changes are not supported and result
1794: # in an error.
1795: # FUTURE WORK:
1796: # Support kerberos passwd changes?
1797: # Parameters:
1798: # $cmd - The command that got us here.
1799: # $tail - Tail of the command (remaining parameters).
1800: # $client - File descriptor connected to client.
1801: # Returns
1802: # 0 - Requested to exit, caller should shut down.
1803: # 1 - Continue processing.
1804: # Implicit inputs:
1805: # The authentication systems describe above have their own forms of implicit
1806: # input into the authentication process that are described above.
1807: sub change_password_handler {
1808: my ($cmd, $tail, $client) = @_;
1809:
1810: my $userinput = $cmd.":".$tail; # Reconstruct client's string.
1811:
1812: #
1813: # udom - user's domain.
1814: # uname - Username.
1815: # upass - Current password.
1816: # npass - New password.
1.346 raeburn 1817: # context - Context in which this was called
1818: # (preferences or reset_by_email).
1.428 raeburn 1819: # lonhost - HostID of server where request originated
1.222 foxr 1820:
1.428 raeburn 1821: my ($udom,$uname,$upass,$npass,$context,$lonhost)=split(/:/,$tail);
1.222 foxr 1822:
1823: $upass=&unescape($upass);
1824: $npass=&unescape($npass);
1825: &Debug("Trying to change password for $uname");
1826:
1827: # First require that the user can be authenticated with their
1.346 raeburn 1828: # old password unless context was 'reset_by_email':
1829:
1.428 raeburn 1830: my ($validated,$failure);
1.346 raeburn 1831: if ($context eq 'reset_by_email') {
1.428 raeburn 1832: if ($lonhost eq '') {
1833: $failure = 'invalid_client';
1834: } else {
1835: $validated = 1;
1836: }
1.346 raeburn 1837: } else {
1838: $validated = &validate_user($udom, $uname, $upass);
1839: }
1.222 foxr 1840: if($validated) {
1841: my $realpasswd = &get_auth_type($udom, $uname); # Defined since authd.
1842:
1843: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1844: if ($howpwd eq 'internal') {
1845: &Debug("internal auth");
1846: my $salt=time;
1847: $salt=substr($salt,6,2);
1848: my $ncpass=crypt($npass,$salt);
1849: if(&rewrite_password_file($udom, $uname, "internal:$ncpass")) {
1.428 raeburn 1850: my $msg="Result of password change for $uname: pwchange_success";
1851: if ($lonhost) {
1852: $msg .= " - request originated from: $lonhost";
1853: }
1854: &logthis($msg);
1.222 foxr 1855: &Reply($client, "ok\n", $userinput);
1856: } else {
1857: &logthis("Unable to open $uname passwd "
1858: ."to change password");
1859: &Failure( $client, "non_authorized\n",$userinput);
1860: }
1.346 raeburn 1861: } elsif ($howpwd eq 'unix' && $context ne 'reset_by_email') {
1.287 foxr 1862: my $result = &change_unix_password($uname, $npass);
1.222 foxr 1863: &logthis("Result of password change for $uname: ".
1.287 foxr 1864: $result);
1.387 albertel 1865: &Reply($client, \$result, $userinput);
1.222 foxr 1866: } else {
1867: # this just means that the current password mode is not
1868: # one we know how to change (e.g the kerberos auth modes or
1869: # locally written auth handler).
1870: #
1871: &Failure( $client, "auth_mode_error\n", $userinput);
1872: }
1873:
1.224 foxr 1874: } else {
1.428 raeburn 1875: if ($failure eq '') {
1876: $failure = 'non_authorized';
1877: }
1878: &Failure( $client, "$failure\n", $userinput);
1.222 foxr 1879: }
1880:
1881: return 1;
1882: }
1.263 albertel 1883: ®ister_handler("passwd", \&change_password_handler, 1, 1, 0);
1.222 foxr 1884:
1.225 foxr 1885: #
1886: # Create a new user. User in this case means a lon-capa user.
1887: # The user must either already exist in some authentication realm
1888: # like kerberos or the /etc/passwd. If not, a user completely local to
1889: # this loncapa system is created.
1890: #
1891: # Parameters:
1892: # $cmd - The command that got us here.
1893: # $tail - Tail of the command (remaining parameters).
1894: # $client - File descriptor connected to client.
1895: # Returns
1896: # 0 - Requested to exit, caller should shut down.
1897: # 1 - Continue processing.
1898: # Implicit inputs:
1899: # The authentication systems describe above have their own forms of implicit
1900: # input into the authentication process that are described above.
1901: sub add_user_handler {
1902:
1903: my ($cmd, $tail, $client) = @_;
1904:
1905:
1906: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
1907: my $userinput = $cmd.":".$tail; # Reconstruct the full request line.
1908:
1909: &Debug("cmd =".$cmd." $udom =".$udom." uname=".$uname);
1910:
1911:
1912: if($udom eq $currentdomainid) { # Reject new users for other domains...
1913:
1914: my $oldumask=umask(0077);
1915: chomp($npass);
1916: $npass=&unescape($npass);
1917: my $passfilename = &password_path($udom, $uname);
1918: &Debug("Password file created will be:".$passfilename);
1919: if (-e $passfilename) {
1920: &Failure( $client, "already_exists\n", $userinput);
1921: } else {
1922: my $fperror='';
1.264 albertel 1923: if (!&mkpath($passfilename)) {
1924: $fperror="error: ".($!+0)." mkdir failed while attempting "
1925: ."makeuser";
1.225 foxr 1926: }
1927: unless ($fperror) {
1928: my $result=&make_passwd_file($uname, $umode,$npass, $passfilename);
1.390 raeburn 1929: &Reply($client,\$result, $userinput); #BUGBUG - could be fail
1.225 foxr 1930: } else {
1.387 albertel 1931: &Failure($client, \$fperror, $userinput);
1.225 foxr 1932: }
1933: }
1934: umask($oldumask);
1935: } else {
1936: &Failure($client, "not_right_domain\n",
1937: $userinput); # Even if we are multihomed.
1938:
1939: }
1940: return 1;
1941:
1942: }
1943: ®ister_handler("makeuser", \&add_user_handler, 1, 1, 0);
1944:
1945: #
1946: # Change the authentication method of a user. Note that this may
1947: # also implicitly change the user's password if, for example, the user is
1948: # joining an existing authentication realm. Known authentication realms at
1949: # this time are:
1950: # internal - Purely internal password file (only loncapa knows this user)
1951: # local - Institutionally written authentication module.
1952: # unix - Unix user (/etc/passwd with or without /etc/shadow).
1953: # kerb4 - kerberos version 4
1954: # kerb5 - kerberos version 5
1955: #
1956: # Parameters:
1957: # $cmd - The command that got us here.
1958: # $tail - Tail of the command (remaining parameters).
1959: # $client - File descriptor connected to client.
1960: # Returns
1961: # 0 - Requested to exit, caller should shut down.
1962: # 1 - Continue processing.
1963: # Implicit inputs:
1964: # The authentication systems describe above have their own forms of implicit
1965: # input into the authentication process that are described above.
1.287 foxr 1966: # NOTE:
1967: # This is also used to change the authentication credential values (e.g. passwd).
1968: #
1.225 foxr 1969: #
1970: sub change_authentication_handler {
1971:
1972: my ($cmd, $tail, $client) = @_;
1973:
1974: my $userinput = "$cmd:$tail"; # Reconstruct user input.
1975:
1976: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
1977: &Debug("cmd = ".$cmd." domain= ".$udom."uname =".$uname." umode= ".$umode);
1978: if ($udom ne $currentdomainid) {
1979: &Failure( $client, "not_right_domain\n", $client);
1980: } else {
1981:
1982: chomp($npass);
1983:
1984: $npass=&unescape($npass);
1.261 foxr 1985: my $oldauth = &get_auth_type($udom, $uname); # Get old auth info.
1.225 foxr 1986: my $passfilename = &password_path($udom, $uname);
1987: if ($passfilename) { # Not allowed to create a new user!!
1.287 foxr 1988: # If just changing the unix passwd. need to arrange to run
1989: # passwd since otherwise make_passwd_file will run
1990: # lcuseradd which fails if an account already exists
1991: # (to prevent an unscrupulous LONCAPA admin from stealing
1992: # an existing account by overwriting it as a LonCAPA account).
1993:
1994: if(($oldauth =~/^unix/) && ($umode eq "unix")) {
1995: my $result = &change_unix_password($uname, $npass);
1996: &logthis("Result of password change for $uname: ".$result);
1997: if ($result eq "ok") {
1.390 raeburn 1998: &Reply($client, \$result);
1.288 albertel 1999: } else {
1.387 albertel 2000: &Failure($client, \$result);
1.287 foxr 2001: }
1.288 albertel 2002: } else {
1.287 foxr 2003: my $result=&make_passwd_file($uname, $umode,$npass,$passfilename);
2004: #
2005: # If the current auth mode is internal, and the old auth mode was
2006: # unix, or krb*, and the user is an author for this domain,
2007: # re-run manage_permissions for that role in order to be able
2008: # to take ownership of the construction space back to www:www
2009: #
2010:
2011:
2012: if( (($oldauth =~ /^unix/) && ($umode eq "internal")) ||
2013: (($oldauth =~ /^internal/) && ($umode eq "unix")) ) {
2014: if(&is_author($udom, $uname)) {
2015: &Debug(" Need to manage author permissions...");
2016: &manage_permissions("/$udom/_au", $udom, $uname, "$umode:");
2017: }
1.261 foxr 2018: }
1.387 albertel 2019: &Reply($client, \$result, $userinput);
1.261 foxr 2020: }
2021:
2022:
1.225 foxr 2023: } else {
1.251 foxr 2024: &Failure($client, "non_authorized\n", $userinput); # Fail the user now.
1.225 foxr 2025: }
2026: }
2027: return 1;
2028: }
2029: ®ister_handler("changeuserauth", \&change_authentication_handler, 1,1, 0);
2030:
2031: #
2032: # Determines if this is the home server for a user. The home server
2033: # for a user will have his/her lon-capa passwd file. Therefore all we need
2034: # to do is determine if this file exists.
2035: #
2036: # Parameters:
2037: # $cmd - The command that got us here.
2038: # $tail - Tail of the command (remaining parameters).
2039: # $client - File descriptor connected to client.
2040: # Returns
2041: # 0 - Requested to exit, caller should shut down.
2042: # 1 - Continue processing.
2043: # Implicit inputs:
2044: # The authentication systems describe above have their own forms of implicit
2045: # input into the authentication process that are described above.
2046: #
2047: sub is_home_handler {
2048: my ($cmd, $tail, $client) = @_;
2049:
2050: my $userinput = "$cmd:$tail";
2051:
2052: my ($udom,$uname)=split(/:/,$tail);
2053: chomp($uname);
2054: my $passfile = &password_filename($udom, $uname);
2055: if($passfile) {
2056: &Reply( $client, "found\n", $userinput);
2057: } else {
2058: &Failure($client, "not_found\n", $userinput);
2059: }
2060: return 1;
2061: }
2062: ®ister_handler("home", \&is_home_handler, 0,1,0);
2063:
2064: #
1.434 www 2065: # Process an update request for a resource.
2066: # A resource has been modified that we hold a subscription to.
1.225 foxr 2067: # If the resource is not local, then we must update, or at least invalidate our
2068: # cached copy of the resource.
2069: # Parameters:
2070: # $cmd - The command that got us here.
2071: # $tail - Tail of the command (remaining parameters).
2072: # $client - File descriptor connected to client.
2073: # Returns
2074: # 0 - Requested to exit, caller should shut down.
2075: # 1 - Continue processing.
2076: # Implicit inputs:
2077: # The authentication systems describe above have their own forms of implicit
2078: # input into the authentication process that are described above.
2079: #
2080: sub update_resource_handler {
2081:
2082: my ($cmd, $tail, $client) = @_;
2083:
2084: my $userinput = "$cmd:$tail";
2085:
2086: my $fname= $tail; # This allows interactive testing
2087:
2088:
2089: my $ownership=ishome($fname);
2090: if ($ownership eq 'not_owner') {
2091: if (-e $fname) {
1.434 www 2092: # Delete preview file, if exists
2093: unlink("$fname.tmp");
2094: # Get usage stats
1.225 foxr 2095: my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
2096: $atime,$mtime,$ctime,$blksize,$blocks)=stat($fname);
2097: my $now=time;
2098: my $since=$now-$atime;
1.434 www 2099: # If the file has not been used within lonExpire seconds,
2100: # unsubscribe from it and delete local copy
1.225 foxr 2101: if ($since>$perlvar{'lonExpire'}) {
1.365 albertel 2102: my $reply=&Apache::lonnet::reply("unsub:$fname","$clientname");
1.308 albertel 2103: &devalidate_meta_cache($fname);
1.225 foxr 2104: unlink("$fname");
1.334 albertel 2105: unlink("$fname.meta");
1.225 foxr 2106: } else {
1.434 www 2107: # Yes, this is in active use. Get a fresh copy. Since it might be in
2108: # very active use and huge (like a movie), copy it to "in.transfer" filename first.
1.225 foxr 2109: my $transname="$fname.in.transfer";
1.365 albertel 2110: my $remoteurl=&Apache::lonnet::reply("sub:$fname","$clientname");
1.225 foxr 2111: my $response;
2112: alarm(120);
2113: {
2114: my $ua=new LWP::UserAgent;
2115: my $request=new HTTP::Request('GET',"$remoteurl");
2116: $response=$ua->request($request,$transname);
2117: }
2118: alarm(0);
2119: if ($response->is_error()) {
2120: unlink($transname);
2121: my $message=$response->status_line;
2122: &logthis("LWP GET: $message for $fname ($remoteurl)");
2123: } else {
2124: if ($remoteurl!~/\.meta$/) {
2125: alarm(120);
2126: {
2127: my $ua=new LWP::UserAgent;
2128: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
2129: my $mresponse=$ua->request($mrequest,$fname.'.meta');
2130: if ($mresponse->is_error()) {
2131: unlink($fname.'.meta');
2132: }
2133: }
2134: alarm(0);
2135: }
1.434 www 2136: # we successfully transfered, copy file over to real name
1.225 foxr 2137: rename($transname,$fname);
1.308 albertel 2138: &devalidate_meta_cache($fname);
1.225 foxr 2139: }
2140: }
2141: &Reply( $client, "ok\n", $userinput);
2142: } else {
2143: &Failure($client, "not_found\n", $userinput);
2144: }
2145: } else {
2146: &Failure($client, "rejected\n", $userinput);
2147: }
2148: return 1;
2149: }
2150: ®ister_handler("update", \&update_resource_handler, 0 ,1, 0);
2151:
1.308 albertel 2152: sub devalidate_meta_cache {
2153: my ($url) = @_;
2154: use Cache::Memcached;
2155: my $memcache = new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
1.365 albertel 2156: $url = &Apache::lonnet::declutter($url);
1.308 albertel 2157: $url =~ s-\.meta$--;
2158: my $id = &escape('meta:'.$url);
2159: $memcache->delete($id);
2160: }
2161:
1.225 foxr 2162: #
1.226 foxr 2163: # Fetch a user file from a remote server to the user's home directory
2164: # userfiles subdir.
1.225 foxr 2165: # Parameters:
2166: # $cmd - The command that got us here.
2167: # $tail - Tail of the command (remaining parameters).
2168: # $client - File descriptor connected to client.
2169: # Returns
2170: # 0 - Requested to exit, caller should shut down.
2171: # 1 - Continue processing.
2172: #
2173: sub fetch_user_file_handler {
2174:
2175: my ($cmd, $tail, $client) = @_;
2176:
2177: my $userinput = "$cmd:$tail";
2178: my $fname = $tail;
1.232 foxr 2179: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
1.225 foxr 2180: my $udir=&propath($udom,$uname).'/userfiles';
2181: unless (-e $udir) {
2182: mkdir($udir,0770);
2183: }
1.232 foxr 2184: Debug("fetch user file for $fname");
1.225 foxr 2185: if (-e $udir) {
2186: $ufile=~s/^[\.\~]+//;
1.232 foxr 2187:
2188: # IF necessary, create the path right down to the file.
2189: # Note that any regular files in the way of this path are
2190: # wiped out to deal with some earlier folly of mine.
2191:
1.267 raeburn 2192: if (!&mkpath($udir.'/'.$ufile)) {
1.264 albertel 2193: &Failure($client, "unable_to_create\n", $userinput);
1.232 foxr 2194: }
2195:
1.225 foxr 2196: my $destname=$udir.'/'.$ufile;
2197: my $transname=$udir.'/'.$ufile.'.in.transit';
2198: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
2199: my $response;
1.232 foxr 2200: Debug("Remote URL : $remoteurl Transfername $transname Destname: $destname");
1.225 foxr 2201: alarm(120);
2202: {
2203: my $ua=new LWP::UserAgent;
2204: my $request=new HTTP::Request('GET',"$remoteurl");
2205: $response=$ua->request($request,$transname);
2206: }
2207: alarm(0);
2208: if ($response->is_error()) {
2209: unlink($transname);
2210: my $message=$response->status_line;
2211: &logthis("LWP GET: $message for $fname ($remoteurl)");
2212: &Failure($client, "failed\n", $userinput);
2213: } else {
1.232 foxr 2214: Debug("Renaming $transname to $destname");
1.225 foxr 2215: if (!rename($transname,$destname)) {
2216: &logthis("Unable to move $transname to $destname");
2217: unlink($transname);
2218: &Failure($client, "failed\n", $userinput);
2219: } else {
2220: &Reply($client, "ok\n", $userinput);
2221: }
2222: }
2223: } else {
2224: &Failure($client, "not_home\n", $userinput);
2225: }
2226: return 1;
2227: }
2228: ®ister_handler("fetchuserfile", \&fetch_user_file_handler, 0, 1, 0);
2229:
1.226 foxr 2230: #
2231: # Remove a file from a user's home directory userfiles subdirectory.
2232: # Parameters:
2233: # cmd - the Lond request keyword that got us here.
2234: # tail - the part of the command past the keyword.
2235: # client- File descriptor connected with the client.
2236: #
2237: # Returns:
2238: # 1 - Continue processing.
2239: sub remove_user_file_handler {
2240: my ($cmd, $tail, $client) = @_;
2241:
2242: my ($fname) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2243:
2244: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
2245: if ($ufile =~m|/\.\./|) {
2246: # any files paths with /../ in them refuse
2247: # to deal with
2248: &Failure($client, "refused\n", "$cmd:$tail");
2249: } else {
2250: my $udir = &propath($udom,$uname);
2251: if (-e $udir) {
2252: my $file=$udir.'/userfiles/'.$ufile;
2253: if (-e $file) {
1.253 foxr 2254: #
2255: # If the file is a regular file unlink is fine...
2256: # However it's possible the client wants a dir.
2257: # removed, in which case rmdir is more approprate:
2258: #
1.240 banghart 2259: if (-f $file){
1.241 albertel 2260: unlink($file);
2261: } elsif(-d $file) {
2262: rmdir($file);
1.240 banghart 2263: }
1.226 foxr 2264: if (-e $file) {
1.253 foxr 2265: # File is still there after we deleted it ?!?
2266:
1.226 foxr 2267: &Failure($client, "failed\n", "$cmd:$tail");
2268: } else {
2269: &Reply($client, "ok\n", "$cmd:$tail");
2270: }
2271: } else {
2272: &Failure($client, "not_found\n", "$cmd:$tail");
2273: }
2274: } else {
2275: &Failure($client, "not_home\n", "$cmd:$tail");
2276: }
2277: }
2278: return 1;
2279: }
2280: ®ister_handler("removeuserfile", \&remove_user_file_handler, 0,1,0);
2281:
1.236 albertel 2282: #
2283: # make a directory in a user's home directory userfiles subdirectory.
2284: # Parameters:
2285: # cmd - the Lond request keyword that got us here.
2286: # tail - the part of the command past the keyword.
2287: # client- File descriptor connected with the client.
2288: #
2289: # Returns:
2290: # 1 - Continue processing.
2291: sub mkdir_user_file_handler {
2292: my ($cmd, $tail, $client) = @_;
2293:
2294: my ($dir) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
2295: $dir=&unescape($dir);
2296: my ($udom,$uname,$ufile) = ($dir =~ m|^([^/]+)/([^/]+)/(.+)$|);
2297: if ($ufile =~m|/\.\./|) {
2298: # any files paths with /../ in them refuse
2299: # to deal with
2300: &Failure($client, "refused\n", "$cmd:$tail");
2301: } else {
2302: my $udir = &propath($udom,$uname);
2303: if (-e $udir) {
1.264 albertel 2304: my $newdir=$udir.'/userfiles/'.$ufile.'/';
2305: if (!&mkpath($newdir)) {
2306: &Failure($client, "failed\n", "$cmd:$tail");
1.236 albertel 2307: }
1.264 albertel 2308: &Reply($client, "ok\n", "$cmd:$tail");
1.236 albertel 2309: } else {
2310: &Failure($client, "not_home\n", "$cmd:$tail");
2311: }
2312: }
2313: return 1;
2314: }
2315: ®ister_handler("mkdiruserfile", \&mkdir_user_file_handler, 0,1,0);
2316:
1.237 albertel 2317: #
2318: # rename a file in a user's home directory userfiles subdirectory.
2319: # Parameters:
2320: # cmd - the Lond request keyword that got us here.
2321: # tail - the part of the command past the keyword.
2322: # client- File descriptor connected with the client.
2323: #
2324: # Returns:
2325: # 1 - Continue processing.
2326: sub rename_user_file_handler {
2327: my ($cmd, $tail, $client) = @_;
2328:
2329: my ($udom,$uname,$old,$new) = split(/:/, $tail);
2330: $old=&unescape($old);
2331: $new=&unescape($new);
2332: if ($new =~m|/\.\./| || $old =~m|/\.\./|) {
2333: # any files paths with /../ in them refuse to deal with
2334: &Failure($client, "refused\n", "$cmd:$tail");
2335: } else {
2336: my $udir = &propath($udom,$uname);
2337: if (-e $udir) {
2338: my $oldfile=$udir.'/userfiles/'.$old;
2339: my $newfile=$udir.'/userfiles/'.$new;
2340: if (-e $newfile) {
2341: &Failure($client, "exists\n", "$cmd:$tail");
2342: } elsif (! -e $oldfile) {
2343: &Failure($client, "not_found\n", "$cmd:$tail");
2344: } else {
2345: if (!rename($oldfile,$newfile)) {
2346: &Failure($client, "failed\n", "$cmd:$tail");
2347: } else {
2348: &Reply($client, "ok\n", "$cmd:$tail");
2349: }
2350: }
2351: } else {
2352: &Failure($client, "not_home\n", "$cmd:$tail");
2353: }
2354: }
2355: return 1;
2356: }
2357: ®ister_handler("renameuserfile", \&rename_user_file_handler, 0,1,0);
2358:
1.227 foxr 2359: #
1.382 albertel 2360: # Checks if the specified user has an active session on the server
2361: # return ok if so, not_found if not
2362: #
2363: # Parameters:
2364: # cmd - The request keyword that dispatched to tus.
2365: # tail - The tail of the request (colon separated parameters).
2366: # client - Filehandle open on the client.
2367: # Return:
2368: # 1.
2369: sub user_has_session_handler {
2370: my ($cmd, $tail, $client) = @_;
2371:
2372: my ($udom, $uname) = map { &unescape($_) } (split(/:/, $tail));
2373:
2374: &logthis("Looking for $udom $uname");
2375: opendir(DIR,$perlvar{'lonIDsDir'});
2376: my $filename;
2377: while ($filename=readdir(DIR)) {
2378: last if ($filename=~/^\Q$uname\E_\d+_\Q$udom\E_/);
2379: }
2380: if ($filename) {
2381: &Reply($client, "ok\n", "$cmd:$tail");
2382: } else {
2383: &Failure($client, "not_found\n", "$cmd:$tail");
2384: }
2385: return 1;
2386:
2387: }
2388: ®ister_handler("userhassession", \&user_has_session_handler, 0,1,0);
2389:
2390: #
1.263 albertel 2391: # Authenticate access to a user file by checking that the token the user's
2392: # passed also exists in their session file
1.227 foxr 2393: #
2394: # Parameters:
2395: # cmd - The request keyword that dispatched to tus.
2396: # tail - The tail of the request (colon separated parameters).
2397: # client - Filehandle open on the client.
2398: # Return:
2399: # 1.
2400: sub token_auth_user_file_handler {
2401: my ($cmd, $tail, $client) = @_;
2402:
2403: my ($fname, $session) = split(/:/, $tail);
2404:
2405: chomp($session);
1.393 raeburn 2406: my $reply="non_auth";
1.343 albertel 2407: my $file = $perlvar{'lonIDsDir'}.'/'.$session.'.id';
2408: if (open(ENVIN,"$file")) {
1.332 albertel 2409: flock(ENVIN,LOCK_SH);
1.343 albertel 2410: tie(my %disk_env,'GDBM_File',"$file",&GDBM_READER(),0640);
2411: if (exists($disk_env{"userfile.$fname"})) {
1.393 raeburn 2412: $reply="ok";
1.343 albertel 2413: } else {
2414: foreach my $envname (keys(%disk_env)) {
2415: if ($envname=~ m|^userfile\.\Q$fname\E|) {
1.393 raeburn 2416: $reply="ok";
1.343 albertel 2417: last;
2418: }
2419: }
1.227 foxr 2420: }
1.343 albertel 2421: untie(%disk_env);
1.227 foxr 2422: close(ENVIN);
1.387 albertel 2423: &Reply($client, \$reply, "$cmd:$tail");
1.227 foxr 2424: } else {
2425: &Failure($client, "invalid_token\n", "$cmd:$tail");
2426: }
2427: return 1;
2428:
2429: }
2430: ®ister_handler("tokenauthuserfile", \&token_auth_user_file_handler, 0,1,0);
1.229 foxr 2431:
2432: #
2433: # Unsubscribe from a resource.
2434: #
2435: # Parameters:
2436: # $cmd - The command that got us here.
2437: # $tail - Tail of the command (remaining parameters).
2438: # $client - File descriptor connected to client.
2439: # Returns
2440: # 0 - Requested to exit, caller should shut down.
2441: # 1 - Continue processing.
2442: #
2443: sub unsubscribe_handler {
2444: my ($cmd, $tail, $client) = @_;
2445:
2446: my $userinput= "$cmd:$tail";
2447:
2448: my ($fname) = split(/:/,$tail); # Split in case there's extrs.
2449:
2450: &Debug("Unsubscribing $fname");
2451: if (-e $fname) {
2452: &Debug("Exists");
2453: &Reply($client, &unsub($fname,$clientip), $userinput);
2454: } else {
2455: &Failure($client, "not_found\n", $userinput);
2456: }
2457: return 1;
2458: }
2459: ®ister_handler("unsub", \&unsubscribe_handler, 0, 1, 0);
1.263 albertel 2460:
1.230 foxr 2461: # Subscribe to a resource
2462: #
2463: # Parameters:
2464: # $cmd - The command that got us here.
2465: # $tail - Tail of the command (remaining parameters).
2466: # $client - File descriptor connected to client.
2467: # Returns
2468: # 0 - Requested to exit, caller should shut down.
2469: # 1 - Continue processing.
2470: #
2471: sub subscribe_handler {
2472: my ($cmd, $tail, $client)= @_;
2473:
2474: my $userinput = "$cmd:$tail";
2475:
2476: &Reply( $client, &subscribe($userinput,$clientip), $userinput);
2477:
2478: return 1;
2479: }
2480: ®ister_handler("sub", \&subscribe_handler, 0, 1, 0);
2481:
2482: #
1.379 albertel 2483: # Determine the latest version of a resource (it looks for the highest
2484: # past version and then returns that +1)
1.230 foxr 2485: #
2486: # Parameters:
2487: # $cmd - The command that got us here.
2488: # $tail - Tail of the command (remaining parameters).
1.379 albertel 2489: # (Should consist of an absolute path to a file)
1.230 foxr 2490: # $client - File descriptor connected to client.
2491: # Returns
2492: # 0 - Requested to exit, caller should shut down.
2493: # 1 - Continue processing.
2494: #
2495: sub current_version_handler {
2496: my ($cmd, $tail, $client) = @_;
2497:
2498: my $userinput= "$cmd:$tail";
2499:
2500: my $fname = $tail;
2501: &Reply( $client, ¤tversion($fname)."\n", $userinput);
2502: return 1;
2503:
2504: }
2505: ®ister_handler("currentversion", \¤t_version_handler, 0, 1, 0);
2506:
2507: # Make an entry in a user's activity log.
2508: #
2509: # Parameters:
2510: # $cmd - The command that got us here.
2511: # $tail - Tail of the command (remaining parameters).
2512: # $client - File descriptor connected to client.
2513: # Returns
2514: # 0 - Requested to exit, caller should shut down.
2515: # 1 - Continue processing.
2516: #
2517: sub activity_log_handler {
2518: my ($cmd, $tail, $client) = @_;
2519:
2520:
2521: my $userinput= "$cmd:$tail";
2522:
2523: my ($udom,$uname,$what)=split(/:/,$tail);
2524: chomp($what);
2525: my $proname=&propath($udom,$uname);
2526: my $now=time;
2527: my $hfh;
2528: if ($hfh=IO::File->new(">>$proname/activity.log")) {
2529: print $hfh "$now:$clientname:$what\n";
2530: &Reply( $client, "ok\n", $userinput);
2531: } else {
2532: &Failure($client, "error: ".($!+0)." IO::File->new Failed "
2533: ."while attempting log\n",
2534: $userinput);
2535: }
2536:
2537: return 1;
2538: }
1.263 albertel 2539: ®ister_handler("log", \&activity_log_handler, 0, 1, 0);
1.230 foxr 2540:
2541: #
2542: # Put a namespace entry in a user profile hash.
2543: # My druthers would be for this to be an encrypted interaction too.
2544: # anything that might be an inadvertent covert channel about either
2545: # user authentication or user personal information....
2546: #
2547: # Parameters:
2548: # $cmd - The command that got us here.
2549: # $tail - Tail of the command (remaining parameters).
2550: # $client - File descriptor connected to client.
2551: # Returns
2552: # 0 - Requested to exit, caller should shut down.
2553: # 1 - Continue processing.
2554: #
2555: sub put_user_profile_entry {
2556: my ($cmd, $tail, $client) = @_;
1.229 foxr 2557:
1.230 foxr 2558: my $userinput = "$cmd:$tail";
2559:
1.242 raeburn 2560: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
1.230 foxr 2561: if ($namespace ne 'roles') {
2562: chomp($what);
2563: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2564: &GDBM_WRCREAT(),"P",$what);
2565: if($hashref) {
2566: my @pairs=split(/\&/,$what);
2567: foreach my $pair (@pairs) {
2568: my ($key,$value)=split(/=/,$pair);
2569: $hashref->{$key}=$value;
2570: }
1.311 albertel 2571: if (&untie_user_hash($hashref)) {
1.230 foxr 2572: &Reply( $client, "ok\n", $userinput);
2573: } else {
2574: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2575: "while attempting put\n",
2576: $userinput);
2577: }
2578: } else {
1.316 albertel 2579: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
1.230 foxr 2580: "while attempting put\n", $userinput);
2581: }
2582: } else {
2583: &Failure( $client, "refused\n", $userinput);
2584: }
2585:
2586: return 1;
2587: }
2588: ®ister_handler("put", \&put_user_profile_entry, 0, 1, 0);
2589:
1.283 albertel 2590: # Put a piece of new data in hash, returns error if entry already exists
2591: # Parameters:
2592: # $cmd - The command that got us here.
2593: # $tail - Tail of the command (remaining parameters).
2594: # $client - File descriptor connected to client.
2595: # Returns
2596: # 0 - Requested to exit, caller should shut down.
2597: # 1 - Continue processing.
2598: #
2599: sub newput_user_profile_entry {
2600: my ($cmd, $tail, $client) = @_;
2601:
2602: my $userinput = "$cmd:$tail";
2603:
2604: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
2605: if ($namespace eq 'roles') {
2606: &Failure( $client, "refused\n", $userinput);
2607: return 1;
2608: }
2609:
2610: chomp($what);
2611:
2612: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2613: &GDBM_WRCREAT(),"N",$what);
2614: if(!$hashref) {
1.316 albertel 2615: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
1.283 albertel 2616: "while attempting put\n", $userinput);
2617: return 1;
2618: }
2619:
2620: my @pairs=split(/\&/,$what);
2621: foreach my $pair (@pairs) {
2622: my ($key,$value)=split(/=/,$pair);
2623: if (exists($hashref->{$key})) {
2624: &Failure($client, "key_exists: ".$key."\n",$userinput);
2625: return 1;
2626: }
2627: }
2628:
2629: foreach my $pair (@pairs) {
2630: my ($key,$value)=split(/=/,$pair);
2631: $hashref->{$key}=$value;
2632: }
2633:
1.311 albertel 2634: if (&untie_user_hash($hashref)) {
1.283 albertel 2635: &Reply( $client, "ok\n", $userinput);
2636: } else {
2637: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2638: "while attempting put\n",
2639: $userinput);
2640: }
2641: return 1;
2642: }
2643: ®ister_handler("newput", \&newput_user_profile_entry, 0, 1, 0);
2644:
1.230 foxr 2645: #
2646: # Increment a profile entry in the user history file.
2647: # The history contains keyword value pairs. In this case,
2648: # The value itself is a pair of numbers. The first, the current value
2649: # the second an increment that this function applies to the current
2650: # value.
2651: #
2652: # Parameters:
2653: # $cmd - The command that got us here.
2654: # $tail - Tail of the command (remaining parameters).
2655: # $client - File descriptor connected to client.
2656: # Returns
2657: # 0 - Requested to exit, caller should shut down.
2658: # 1 - Continue processing.
2659: #
2660: sub increment_user_value_handler {
2661: my ($cmd, $tail, $client) = @_;
2662:
2663: my $userinput = "$cmd:$tail";
2664:
2665: my ($udom,$uname,$namespace,$what) =split(/:/,$tail);
2666: if ($namespace ne 'roles') {
2667: chomp($what);
2668: my $hashref = &tie_user_hash($udom, $uname,
2669: $namespace, &GDBM_WRCREAT(),
2670: "P",$what);
2671: if ($hashref) {
2672: my @pairs=split(/\&/,$what);
2673: foreach my $pair (@pairs) {
2674: my ($key,$value)=split(/=/,$pair);
1.284 raeburn 2675: $value = &unescape($value);
1.230 foxr 2676: # We could check that we have a number...
2677: if (! defined($value) || $value eq '') {
2678: $value = 1;
2679: }
2680: $hashref->{$key}+=$value;
1.284 raeburn 2681: if ($namespace eq 'nohist_resourcetracker') {
2682: if ($hashref->{$key} < 0) {
2683: $hashref->{$key} = 0;
2684: }
2685: }
1.230 foxr 2686: }
1.311 albertel 2687: if (&untie_user_hash($hashref)) {
1.230 foxr 2688: &Reply( $client, "ok\n", $userinput);
2689: } else {
2690: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2691: "while attempting inc\n", $userinput);
2692: }
2693: } else {
2694: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2695: "while attempting inc\n", $userinput);
2696: }
2697: } else {
2698: &Failure($client, "refused\n", $userinput);
2699: }
2700:
2701: return 1;
2702: }
2703: ®ister_handler("inc", \&increment_user_value_handler, 0, 1, 0);
2704:
2705: #
2706: # Put a new role for a user. Roles are LonCAPA's packaging of permissions.
2707: # Each 'role' a user has implies a set of permissions. Adding a new role
2708: # for a person grants the permissions packaged with that role
2709: # to that user when the role is selected.
2710: #
2711: # Parameters:
2712: # $cmd - The command string (rolesput).
2713: # $tail - The remainder of the request line. For rolesput this
2714: # consists of a colon separated list that contains:
2715: # The domain and user that is granting the role (logged).
2716: # The domain and user that is getting the role.
2717: # The roles being granted as a set of & separated pairs.
2718: # each pair a key value pair.
2719: # $client - File descriptor connected to the client.
2720: # Returns:
2721: # 0 - If the daemon should exit
2722: # 1 - To continue processing.
2723: #
2724: #
2725: sub roles_put_handler {
2726: my ($cmd, $tail, $client) = @_;
2727:
2728: my $userinput = "$cmd:$tail";
2729:
2730: my ( $exedom, $exeuser, $udom, $uname, $what) = split(/:/,$tail);
2731:
2732:
2733: my $namespace='roles';
2734: chomp($what);
2735: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2736: &GDBM_WRCREAT(), "P",
2737: "$exedom:$exeuser:$what");
2738: #
2739: # Log the attempt to set a role. The {}'s here ensure that the file
2740: # handle is open for the minimal amount of time. Since the flush
2741: # is done on close this improves the chances the log will be an un-
2742: # corrupted ordered thing.
2743: if ($hashref) {
1.261 foxr 2744: my $pass_entry = &get_auth_type($udom, $uname);
2745: my ($auth_type,$pwd) = split(/:/, $pass_entry);
2746: $auth_type = $auth_type.":";
1.230 foxr 2747: my @pairs=split(/\&/,$what);
2748: foreach my $pair (@pairs) {
2749: my ($key,$value)=split(/=/,$pair);
2750: &manage_permissions($key, $udom, $uname,
1.260 foxr 2751: $auth_type);
1.230 foxr 2752: $hashref->{$key}=$value;
2753: }
1.311 albertel 2754: if (&untie_user_hash($hashref)) {
1.230 foxr 2755: &Reply($client, "ok\n", $userinput);
2756: } else {
2757: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2758: "while attempting rolesput\n", $userinput);
2759: }
2760: } else {
2761: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2762: "while attempting rolesput\n", $userinput);
2763: }
2764: return 1;
2765: }
2766: ®ister_handler("rolesput", \&roles_put_handler, 1,1,0); # Encoded client only.
2767:
2768: #
1.231 foxr 2769: # Deletes (removes) a role for a user. This is equivalent to removing
2770: # a permissions package associated with the role from the user's profile.
2771: #
2772: # Parameters:
2773: # $cmd - The command (rolesdel)
2774: # $tail - The remainder of the request line. This consists
2775: # of:
2776: # The domain and user requesting the change (logged)
2777: # The domain and user being changed.
2778: # The roles being revoked. These are shipped to us
2779: # as a bunch of & separated role name keywords.
2780: # $client - The file handle open on the client.
2781: # Returns:
2782: # 1 - Continue processing
2783: # 0 - Exit.
2784: #
2785: sub roles_delete_handler {
2786: my ($cmd, $tail, $client) = @_;
2787:
2788: my $userinput = "$cmd:$tail";
2789:
2790: my ($exedom,$exeuser,$udom,$uname,$what)=split(/:/,$tail);
2791: &Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom.
2792: "what = ".$what);
2793: my $namespace='roles';
2794: chomp($what);
2795: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2796: &GDBM_WRCREAT(), "D",
2797: "$exedom:$exeuser:$what");
2798:
2799: if ($hashref) {
2800: my @rolekeys=split(/\&/,$what);
2801:
2802: foreach my $key (@rolekeys) {
2803: delete $hashref->{$key};
2804: }
1.315 albertel 2805: if (&untie_user_hash($hashref)) {
1.231 foxr 2806: &Reply($client, "ok\n", $userinput);
2807: } else {
2808: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2809: "while attempting rolesdel\n", $userinput);
2810: }
2811: } else {
2812: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2813: "while attempting rolesdel\n", $userinput);
2814: }
2815:
2816: return 1;
2817: }
2818: ®ister_handler("rolesdel", \&roles_delete_handler, 1,1, 0); # Encoded client only
2819:
2820: # Unencrypted get from a user's profile database. See
2821: # GetProfileEntryEncrypted for a version that does end-to-end encryption.
2822: # This function retrieves a keyed item from a specific named database in the
2823: # user's directory.
2824: #
2825: # Parameters:
2826: # $cmd - Command request keyword (get).
2827: # $tail - Tail of the command. This is a colon separated list
2828: # consisting of the domain and username that uniquely
2829: # identifies the profile,
2830: # The 'namespace' which selects the gdbm file to
2831: # do the lookup in,
2832: # & separated list of keys to lookup. Note that
2833: # the values are returned as an & separated list too.
2834: # $client - File descriptor open on the client.
2835: # Returns:
2836: # 1 - Continue processing.
2837: # 0 - Exit.
2838: #
2839: sub get_profile_entry {
2840: my ($cmd, $tail, $client) = @_;
2841:
2842: my $userinput= "$cmd:$tail";
2843:
2844: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2845: chomp($what);
1.255 foxr 2846:
1.390 raeburn 2847:
1.255 foxr 2848: my $replystring = read_profile($udom, $uname, $namespace, $what);
2849: my ($first) = split(/:/,$replystring);
2850: if($first ne "error") {
1.387 albertel 2851: &Reply($client, \$replystring, $userinput);
1.231 foxr 2852: } else {
1.255 foxr 2853: &Failure($client, $replystring." while attempting get\n", $userinput);
1.231 foxr 2854: }
2855: return 1;
1.255 foxr 2856:
2857:
1.231 foxr 2858: }
2859: ®ister_handler("get", \&get_profile_entry, 0,1,0);
2860:
2861: #
2862: # Process the encrypted get request. Note that the request is sent
2863: # in clear, but the reply is encrypted. This is a small covert channel:
2864: # information about the sensitive keys is given to the snooper. Just not
2865: # information about the values of the sensitive key. Hmm if I wanted to
2866: # know these I'd snoop for the egets. Get the profile item names from them
2867: # and then issue a get for them since there's no enforcement of the
2868: # requirement of an encrypted get for particular profile items. If I
2869: # were re-doing this, I'd force the request to be encrypted as well as the
2870: # reply. I'd also just enforce encrypted transactions for all gets since
2871: # that would prevent any covert channel snooping.
2872: #
2873: # Parameters:
2874: # $cmd - Command keyword of request (eget).
2875: # $tail - Tail of the command. See GetProfileEntry
# for more information about this.
2876: # $client - File open on the client.
2877: # Returns:
2878: # 1 - Continue processing
2879: # 0 - server should exit.
2880: sub get_profile_entry_encrypted {
2881: my ($cmd, $tail, $client) = @_;
2882:
2883: my $userinput = "$cmd:$tail";
2884:
1.339 albertel 2885: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
1.231 foxr 2886: chomp($what);
1.255 foxr 2887: my $qresult = read_profile($udom, $uname, $namespace, $what);
2888: my ($first) = split(/:/, $qresult);
2889: if($first ne "error") {
2890:
2891: if ($cipher) {
2892: my $cmdlength=length($qresult);
2893: $qresult.=" ";
2894: my $encqresult='';
2895: for(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
2896: $encqresult.= unpack("H16",
2897: $cipher->encrypt(substr($qresult,
2898: $encidx,
2899: 8)));
2900: }
2901: &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput);
2902: } else {
1.231 foxr 2903: &Failure( $client, "error:no_key\n", $userinput);
2904: }
2905: } else {
1.255 foxr 2906: &Failure($client, "$qresult while attempting eget\n", $userinput);
2907:
1.231 foxr 2908: }
2909:
2910: return 1;
2911: }
1.255 foxr 2912: ®ister_handler("eget", \&get_profile_entry_encrypted, 0, 1, 0);
1.263 albertel 2913:
1.231 foxr 2914: #
2915: # Deletes a key in a user profile database.
2916: #
2917: # Parameters:
2918: # $cmd - Command keyword (del).
2919: # $tail - Command tail. IN this case a colon
2920: # separated list containing:
2921: # The domain and user that identifies uniquely
2922: # the identity of the user.
2923: # The profile namespace (name of the profile
2924: # database file).
2925: # & separated list of keywords to delete.
2926: # $client - File open on client socket.
2927: # Returns:
2928: # 1 - Continue processing
2929: # 0 - Exit server.
2930: #
2931: #
2932: sub delete_profile_entry {
2933: my ($cmd, $tail, $client) = @_;
2934:
2935: my $userinput = "cmd:$tail";
2936:
2937: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2938: chomp($what);
2939: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2940: &GDBM_WRCREAT(),
2941: "D",$what);
2942: if ($hashref) {
2943: my @keys=split(/\&/,$what);
2944: foreach my $key (@keys) {
2945: delete($hashref->{$key});
2946: }
1.315 albertel 2947: if (&untie_user_hash($hashref)) {
1.231 foxr 2948: &Reply($client, "ok\n", $userinput);
2949: } else {
2950: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2951: "while attempting del\n", $userinput);
2952: }
2953: } else {
2954: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2955: "while attempting del\n", $userinput);
2956: }
2957: return 1;
2958: }
2959: ®ister_handler("del", \&delete_profile_entry, 0, 1, 0);
1.263 albertel 2960:
1.231 foxr 2961: #
2962: # List the set of keys that are defined in a profile database file.
2963: # A successful reply from this will contain an & separated list of
2964: # the keys.
2965: # Parameters:
2966: # $cmd - Command request (keys).
2967: # $tail - Remainder of the request, a colon separated
2968: # list containing domain/user that identifies the
2969: # user being queried, and the database namespace
2970: # (database filename essentially).
2971: # $client - File open on the client.
2972: # Returns:
2973: # 1 - Continue processing.
2974: # 0 - Exit the server.
2975: #
2976: sub get_profile_keys {
2977: my ($cmd, $tail, $client) = @_;
2978:
2979: my $userinput = "$cmd:$tail";
2980:
2981: my ($udom,$uname,$namespace)=split(/:/,$tail);
2982: my $qresult='';
2983: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2984: &GDBM_READER());
2985: if ($hashref) {
2986: foreach my $key (keys %$hashref) {
2987: $qresult.="$key&";
2988: }
1.315 albertel 2989: if (&untie_user_hash($hashref)) {
1.231 foxr 2990: $qresult=~s/\&$//;
1.387 albertel 2991: &Reply($client, \$qresult, $userinput);
1.231 foxr 2992: } else {
2993: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2994: "while attempting keys\n", $userinput);
2995: }
2996: } else {
2997: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2998: "while attempting keys\n", $userinput);
2999: }
3000:
3001: return 1;
3002: }
3003: ®ister_handler("keys", \&get_profile_keys, 0, 1, 0);
3004:
3005: #
3006: # Dump the contents of a user profile database.
3007: # Note that this constitutes a very large covert channel too since
3008: # the dump will return sensitive information that is not encrypted.
3009: # The naive security assumption is that the session negotiation ensures
3010: # our client is trusted and I don't believe that's assured at present.
3011: # Sure want badly to go to ssl or tls. Of course if my peer isn't really
3012: # a LonCAPA node they could have negotiated an encryption key too so >sigh<.
3013: #
3014: # Parameters:
3015: # $cmd - The command request keyword (currentdump).
3016: # $tail - Remainder of the request, consisting of a colon
3017: # separated list that has the domain/username and
3018: # the namespace to dump (database file).
3019: # $client - file open on the remote client.
3020: # Returns:
3021: # 1 - Continue processing.
3022: # 0 - Exit the server.
3023: #
3024: sub dump_profile_database {
3025: my ($cmd, $tail, $client) = @_;
3026:
3027: my $userinput = "$cmd:$tail";
3028:
3029: my ($udom,$uname,$namespace) = split(/:/,$tail);
3030: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3031: &GDBM_READER());
3032: if ($hashref) {
3033: # Structure of %data:
3034: # $data{$symb}->{$parameter}=$value;
3035: # $data{$symb}->{'v.'.$parameter}=$version;
3036: # since $parameter will be unescaped, we do not
3037: # have to worry about silly parameter names...
3038:
3039: my $qresult='';
3040: my %data = (); # A hash of anonymous hashes..
3041: while (my ($key,$value) = each(%$hashref)) {
3042: my ($v,$symb,$param) = split(/:/,$key);
3043: next if ($v eq 'version' || $symb eq 'keys');
3044: next if (exists($data{$symb}) &&
3045: exists($data{$symb}->{$param}) &&
3046: $data{$symb}->{'v.'.$param} > $v);
3047: $data{$symb}->{$param}=$value;
3048: $data{$symb}->{'v.'.$param}=$v;
3049: }
1.311 albertel 3050: if (&untie_user_hash($hashref)) {
1.231 foxr 3051: while (my ($symb,$param_hash) = each(%data)) {
3052: while(my ($param,$value) = each (%$param_hash)){
3053: next if ($param =~ /^v\./); # Ignore versions...
3054: #
3055: # Just dump the symb=value pairs separated by &
3056: #
3057: $qresult.=$symb.':'.$param.'='.$value.'&';
3058: }
3059: }
3060: chop($qresult);
1.387 albertel 3061: &Reply($client , \$qresult, $userinput);
1.231 foxr 3062: } else {
3063: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3064: "while attempting currentdump\n", $userinput);
3065: }
3066: } else {
3067: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3068: "while attempting currentdump\n", $userinput);
3069: }
3070:
3071: return 1;
3072: }
3073: ®ister_handler("currentdump", \&dump_profile_database, 0, 1, 0);
3074:
3075: #
3076: # Dump a profile database with an optional regular expression
3077: # to match against the keys. In this dump, no effort is made
3078: # to separate symb from version information. Presumably the
3079: # databases that are dumped by this command are of a different
3080: # structure. Need to look at this and improve the documentation of
3081: # both this and the currentdump handler.
3082: # Parameters:
3083: # $cmd - The command keyword.
3084: # $tail - All of the characters after the $cmd:
3085: # These are expected to be a colon
3086: # separated list containing:
3087: # domain/user - identifying the user.
3088: # namespace - identifying the database.
3089: # regexp - optional regular expression
3090: # that is matched against
3091: # database keywords to do
3092: # selective dumps.
3093: # $client - Channel open on the client.
3094: # Returns:
3095: # 1 - Continue processing.
3096: # Side effects:
3097: # response is written to $client.
3098: #
3099: sub dump_with_regexp {
3100: my ($cmd, $tail, $client) = @_;
3101:
3102:
3103: my $userinput = "$cmd:$tail";
3104:
1.306 albertel 3105: my ($udom,$uname,$namespace,$regexp,$range)=split(/:/,$tail);
1.231 foxr 3106: if (defined($regexp)) {
3107: $regexp=&unescape($regexp);
3108: } else {
3109: $regexp='.';
3110: }
1.306 albertel 3111: my ($start,$end);
3112: if (defined($range)) {
3113: if ($range =~/^(\d+)\-(\d+)$/) {
3114: ($start,$end) = ($1,$2);
3115: } elsif ($range =~/^(\d+)$/) {
3116: ($start,$end) = (0,$1);
3117: } else {
3118: undef($range);
3119: }
3120: }
1.231 foxr 3121: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3122: &GDBM_READER());
3123: if ($hashref) {
3124: my $qresult='';
1.306 albertel 3125: my $count=0;
1.231 foxr 3126: while (my ($key,$value) = each(%$hashref)) {
1.432 raeburn 3127: if ($namespace eq 'roles') {
1.433 raeburn 3128: if ($key =~ /^($LONCAPA::match_domain)_($LONCAPA::match_community)_(cc|co|in|ta|ep|ad|st|cr)/) {
3129: if ($clientversion =~ /^(\d+)\.(\d+)$/) {
3130: my $major = $1;
3131: my $minor = $2;
1.435 raeburn 3132: next if (($major < 2) || (($major == 2) && ($minor < 9)));
1.432 raeburn 3133: }
3134: }
3135: }
1.231 foxr 3136: if ($regexp eq '.') {
1.306 albertel 3137: $count++;
3138: if (defined($range) && $count >= $end) { last; }
3139: if (defined($range) && $count < $start) { next; }
1.231 foxr 3140: $qresult.=$key.'='.$value.'&';
3141: } else {
3142: my $unescapeKey = &unescape($key);
3143: if (eval('$unescapeKey=~/$regexp/')) {
1.306 albertel 3144: $count++;
3145: if (defined($range) && $count >= $end) { last; }
3146: if (defined($range) && $count < $start) { next; }
1.231 foxr 3147: $qresult.="$key=$value&";
3148: }
3149: }
3150: }
1.311 albertel 3151: if (&untie_user_hash($hashref)) {
1.231 foxr 3152: chop($qresult);
1.387 albertel 3153: &Reply($client, \$qresult, $userinput);
1.231 foxr 3154: } else {
3155: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3156: "while attempting dump\n", $userinput);
3157: }
3158: } else {
3159: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3160: "while attempting dump\n", $userinput);
3161: }
3162:
3163: return 1;
3164: }
3165: ®ister_handler("dump", \&dump_with_regexp, 0, 1, 0);
3166:
3167: # Store a set of key=value pairs associated with a versioned name.
3168: #
3169: # Parameters:
3170: # $cmd - Request command keyword.
3171: # $tail - Tail of the request. This is a colon
3172: # separated list containing:
3173: # domain/user - User and authentication domain.
3174: # namespace - Name of the database being modified
3175: # rid - Resource keyword to modify.
3176: # what - new value associated with rid.
3177: #
3178: # $client - Socket open on the client.
3179: #
3180: #
3181: # Returns:
3182: # 1 (keep on processing).
3183: # Side-Effects:
3184: # Writes to the client
3185: sub store_handler {
3186: my ($cmd, $tail, $client) = @_;
3187:
3188: my $userinput = "$cmd:$tail";
3189:
3190: my ($udom,$uname,$namespace,$rid,$what) =split(/:/,$tail);
3191: if ($namespace ne 'roles') {
3192:
3193: chomp($what);
3194: my @pairs=split(/\&/,$what);
3195: my $hashref = &tie_user_hash($udom, $uname, $namespace,
1.268 albertel 3196: &GDBM_WRCREAT(), "S",
1.231 foxr 3197: "$rid:$what");
3198: if ($hashref) {
3199: my $now = time;
3200: my @previouskeys=split(/&/,$hashref->{"keys:$rid"});
3201: my $key;
3202: $hashref->{"version:$rid"}++;
3203: my $version=$hashref->{"version:$rid"};
3204: my $allkeys='';
3205: foreach my $pair (@pairs) {
3206: my ($key,$value)=split(/=/,$pair);
3207: $allkeys.=$key.':';
3208: $hashref->{"$version:$rid:$key"}=$value;
3209: }
3210: $hashref->{"$version:$rid:timestamp"}=$now;
3211: $allkeys.='timestamp';
3212: $hashref->{"$version:keys:$rid"}=$allkeys;
1.311 albertel 3213: if (&untie_user_hash($hashref)) {
1.231 foxr 3214: &Reply($client, "ok\n", $userinput);
3215: } else {
3216: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3217: "while attempting store\n", $userinput);
3218: }
3219: } else {
3220: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3221: "while attempting store\n", $userinput);
3222: }
3223: } else {
3224: &Failure($client, "refused\n", $userinput);
3225: }
3226:
3227: return 1;
3228: }
3229: ®ister_handler("store", \&store_handler, 0, 1, 0);
1.263 albertel 3230:
1.323 albertel 3231: # Modify a set of key=value pairs associated with a versioned name.
3232: #
3233: # Parameters:
3234: # $cmd - Request command keyword.
3235: # $tail - Tail of the request. This is a colon
3236: # separated list containing:
3237: # domain/user - User and authentication domain.
3238: # namespace - Name of the database being modified
3239: # rid - Resource keyword to modify.
3240: # v - Version item to modify
3241: # what - new value associated with rid.
3242: #
3243: # $client - Socket open on the client.
3244: #
3245: #
3246: # Returns:
3247: # 1 (keep on processing).
3248: # Side-Effects:
3249: # Writes to the client
3250: sub putstore_handler {
3251: my ($cmd, $tail, $client) = @_;
3252:
3253: my $userinput = "$cmd:$tail";
3254:
3255: my ($udom,$uname,$namespace,$rid,$v,$what) =split(/:/,$tail);
3256: if ($namespace ne 'roles') {
3257:
3258: chomp($what);
3259: my $hashref = &tie_user_hash($udom, $uname, $namespace,
3260: &GDBM_WRCREAT(), "M",
3261: "$rid:$v:$what");
3262: if ($hashref) {
3263: my $now = time;
3264: my %data = &hash_extract($what);
3265: my @allkeys;
3266: while (my($key,$value) = each(%data)) {
3267: push(@allkeys,$key);
3268: $hashref->{"$v:$rid:$key"} = $value;
3269: }
3270: my $allkeys = join(':',@allkeys);
3271: $hashref->{"$v:keys:$rid"}=$allkeys;
3272:
3273: if (&untie_user_hash($hashref)) {
3274: &Reply($client, "ok\n", $userinput);
3275: } else {
3276: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3277: "while attempting store\n", $userinput);
3278: }
3279: } else {
3280: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3281: "while attempting store\n", $userinput);
3282: }
3283: } else {
3284: &Failure($client, "refused\n", $userinput);
3285: }
3286:
3287: return 1;
3288: }
3289: ®ister_handler("putstore", \&putstore_handler, 0, 1, 0);
3290:
3291: sub hash_extract {
3292: my ($str)=@_;
3293: my %hash;
3294: foreach my $pair (split(/\&/,$str)) {
3295: my ($key,$value)=split(/=/,$pair);
3296: $hash{$key}=$value;
3297: }
3298: return (%hash);
3299: }
3300: sub hash_to_str {
3301: my ($hash_ref)=@_;
3302: my $str;
3303: foreach my $key (keys(%$hash_ref)) {
3304: $str.=$key.'='.$hash_ref->{$key}.'&';
3305: }
3306: $str=~s/\&$//;
3307: return $str;
3308: }
3309:
1.231 foxr 3310: #
3311: # Dump out all versions of a resource that has key=value pairs associated
3312: # with it for each version. These resources are built up via the store
3313: # command.
3314: #
3315: # Parameters:
3316: # $cmd - Command keyword.
3317: # $tail - Remainder of the request which consists of:
3318: # domain/user - User and auth. domain.
3319: # namespace - name of resource database.
3320: # rid - Resource id.
3321: # $client - socket open on the client.
3322: #
3323: # Returns:
3324: # 1 indicating the caller should not yet exit.
3325: # Side-effects:
3326: # Writes a reply to the client.
3327: # The reply is a string of the following shape:
3328: # version=current&version:keys=k1:k2...&1:k1=v1&1:k2=v2...
3329: # Where the 1 above represents version 1.
3330: # this continues for all pairs of keys in all versions.
3331: #
3332: #
3333: #
3334: #
3335: sub restore_handler {
3336: my ($cmd, $tail, $client) = @_;
3337:
3338: my $userinput = "$cmd:$tail"; # Only used for logging purposes.
1.351 banghart 3339: my ($udom,$uname,$namespace,$rid) = split(/:/,$tail);
1.352 albertel 3340: $namespace=~s/\//\_/g;
1.350 albertel 3341: $namespace = &LONCAPA::clean_username($namespace);
1.349 albertel 3342:
1.231 foxr 3343: chomp($rid);
3344: my $qresult='';
1.309 albertel 3345: my $hashref = &tie_user_hash($udom, $uname, $namespace, &GDBM_READER());
3346: if ($hashref) {
3347: my $version=$hashref->{"version:$rid"};
1.231 foxr 3348: $qresult.="version=$version&";
3349: my $scope;
3350: for ($scope=1;$scope<=$version;$scope++) {
1.309 albertel 3351: my $vkeys=$hashref->{"$scope:keys:$rid"};
1.231 foxr 3352: my @keys=split(/:/,$vkeys);
3353: my $key;
3354: $qresult.="$scope:keys=$vkeys&";
3355: foreach $key (@keys) {
1.309 albertel 3356: $qresult.="$scope:$key=".$hashref->{"$scope:$rid:$key"}."&";
1.231 foxr 3357: }
3358: }
1.311 albertel 3359: if (&untie_user_hash($hashref)) {
1.231 foxr 3360: $qresult=~s/\&$//;
1.387 albertel 3361: &Reply( $client, \$qresult, $userinput);
1.231 foxr 3362: } else {
3363: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3364: "while attempting restore\n", $userinput);
3365: }
3366: } else {
3367: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3368: "while attempting restore\n", $userinput);
3369: }
3370:
3371: return 1;
3372:
3373:
3374: }
3375: ®ister_handler("restore", \&restore_handler, 0,1,0);
1.234 foxr 3376:
3377: #
1.324 raeburn 3378: # Add a chat message to a synchronous discussion board.
1.234 foxr 3379: #
3380: # Parameters:
3381: # $cmd - Request keyword.
3382: # $tail - Tail of the command. A colon separated list
3383: # containing:
3384: # cdom - Domain on which the chat board lives
1.324 raeburn 3385: # cnum - Course containing the chat board.
3386: # newpost - Body of the posting.
3387: # group - Optional group, if chat board is only
3388: # accessible in a group within the course
1.234 foxr 3389: # $client - Socket open on the client.
3390: # Returns:
3391: # 1 - Indicating caller should keep on processing.
3392: #
3393: # Side-effects:
3394: # writes a reply to the client.
3395: #
3396: #
3397: sub send_chat_handler {
3398: my ($cmd, $tail, $client) = @_;
3399:
3400:
3401: my $userinput = "$cmd:$tail";
3402:
1.324 raeburn 3403: my ($cdom,$cnum,$newpost,$group)=split(/\:/,$tail);
3404: &chat_add($cdom,$cnum,$newpost,$group);
1.234 foxr 3405: &Reply($client, "ok\n", $userinput);
3406:
3407: return 1;
3408: }
3409: ®ister_handler("chatsend", \&send_chat_handler, 0, 1, 0);
1.263 albertel 3410:
1.234 foxr 3411: #
1.324 raeburn 3412: # Retrieve the set of chat messages from a discussion board.
1.234 foxr 3413: #
3414: # Parameters:
3415: # $cmd - Command keyword that initiated the request.
3416: # $tail - Remainder of the request after the command
3417: # keyword. In this case a colon separated list of
3418: # chat domain - Which discussion board.
3419: # chat id - Discussion thread(?)
3420: # domain/user - Authentication domain and username
3421: # of the requesting person.
1.324 raeburn 3422: # group - Optional course group containing
3423: # the board.
1.234 foxr 3424: # $client - Socket open on the client program.
3425: # Returns:
3426: # 1 - continue processing
3427: # Side effects:
3428: # Response is written to the client.
3429: #
3430: sub retrieve_chat_handler {
3431: my ($cmd, $tail, $client) = @_;
3432:
3433:
3434: my $userinput = "$cmd:$tail";
3435:
1.324 raeburn 3436: my ($cdom,$cnum,$udom,$uname,$group)=split(/\:/,$tail);
1.234 foxr 3437: my $reply='';
1.324 raeburn 3438: foreach (&get_chat($cdom,$cnum,$udom,$uname,$group)) {
1.234 foxr 3439: $reply.=&escape($_).':';
3440: }
3441: $reply=~s/\:$//;
1.387 albertel 3442: &Reply($client, \$reply, $userinput);
1.234 foxr 3443:
3444:
3445: return 1;
3446: }
3447: ®ister_handler("chatretr", \&retrieve_chat_handler, 0, 1, 0);
3448:
3449: #
3450: # Initiate a query of an sql database. SQL query repsonses get put in
3451: # a file for later retrieval. This prevents sql query results from
3452: # bottlenecking the system. Note that with loncnew, perhaps this is
3453: # less of an issue since multiple outstanding requests can be concurrently
3454: # serviced.
3455: #
3456: # Parameters:
3457: # $cmd - COmmand keyword that initiated the request.
3458: # $tail - Remainder of the command after the keyword.
3459: # For this function, this consists of a query and
3460: # 3 arguments that are self-documentingly labelled
3461: # in the original arg1, arg2, arg3.
3462: # $client - Socket open on the client.
3463: # Return:
3464: # 1 - Indicating processing should continue.
3465: # Side-effects:
3466: # a reply is written to $client.
3467: #
3468: sub send_query_handler {
3469: my ($cmd, $tail, $client) = @_;
3470:
3471:
3472: my $userinput = "$cmd:$tail";
3473:
3474: my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail);
3475: $query=~s/\n*$//g;
3476: &Reply($client, "". &sql_reply("$clientname\&$query".
3477: "\&$arg1"."\&$arg2"."\&$arg3")."\n",
3478: $userinput);
3479:
3480: return 1;
3481: }
3482: ®ister_handler("querysend", \&send_query_handler, 0, 1, 0);
3483:
3484: #
3485: # Add a reply to an sql query. SQL queries are done asyncrhonously.
3486: # The query is submitted via a "querysend" transaction.
3487: # There it is passed on to the lonsql daemon, queued and issued to
3488: # mysql.
3489: # This transaction is invoked when the sql transaction is complete
3490: # it stores the query results in flie and indicates query completion.
3491: # presumably local software then fetches this response... I'm guessing
3492: # the sequence is: lonc does a querysend, we ask lonsql to do it.
3493: # lonsql on completion of the query interacts with the lond of our
3494: # client to do a query reply storing two files:
3495: # - id - The results of the query.
3496: # - id.end - Indicating the transaction completed.
3497: # NOTE: id is a unique id assigned to the query and querysend time.
3498: # Parameters:
3499: # $cmd - Command keyword that initiated this request.
3500: # $tail - Remainder of the tail. In this case that's a colon
3501: # separated list containing the query Id and the
3502: # results of the query.
3503: # $client - Socket open on the client.
3504: # Return:
3505: # 1 - Indicating that we should continue processing.
3506: # Side effects:
3507: # ok written to the client.
3508: #
3509: sub reply_query_handler {
3510: my ($cmd, $tail, $client) = @_;
3511:
3512:
3513: my $userinput = "$cmd:$tail";
3514:
1.339 albertel 3515: my ($id,$reply)=split(/:/,$tail);
1.234 foxr 3516: my $store;
3517: my $execdir=$perlvar{'lonDaemons'};
3518: if ($store=IO::File->new(">$execdir/tmp/$id")) {
3519: $reply=~s/\&/\n/g;
3520: print $store $reply;
3521: close $store;
3522: my $store2=IO::File->new(">$execdir/tmp/$id.end");
3523: print $store2 "done\n";
3524: close $store2;
3525: &Reply($client, "ok\n", $userinput);
3526: } else {
3527: &Failure($client, "error: ".($!+0)
3528: ." IO::File->new Failed ".
3529: "while attempting queryreply\n", $userinput);
3530: }
3531:
3532:
3533: return 1;
3534: }
3535: ®ister_handler("queryreply", \&reply_query_handler, 0, 1, 0);
3536:
3537: #
3538: # Process the courseidput request. Not quite sure what this means
3539: # at the system level sense. It appears a gdbm file in the
3540: # /home/httpd/lonUsers/$domain/nohist_courseids is tied and
3541: # a set of entries made in that database.
3542: #
3543: # Parameters:
3544: # $cmd - The command keyword that initiated this request.
3545: # $tail - Tail of the command. In this case consists of a colon
3546: # separated list contaning the domain to apply this to and
3547: # an ampersand separated list of keyword=value pairs.
1.272 raeburn 3548: # Each value is a colon separated list that includes:
3549: # description, institutional code and course owner.
3550: # For backward compatibility with versions included
3551: # in LON-CAPA 1.1.X (and earlier) and 1.2.X, institutional
3552: # code and/or course owner are preserved from the existing
3553: # record when writing a new record in response to 1.1 or
3554: # 1.2 implementations of lonnet::flushcourselogs().
3555: #
1.234 foxr 3556: # $client - Socket open on the client.
3557: # Returns:
3558: # 1 - indicating that processing should continue
3559: #
3560: # Side effects:
3561: # reply is written to the client.
3562: #
3563: sub put_course_id_handler {
3564: my ($cmd, $tail, $client) = @_;
3565:
3566:
3567: my $userinput = "$cmd:$tail";
3568:
1.266 raeburn 3569: my ($udom, $what) = split(/:/, $tail,2);
1.234 foxr 3570: chomp($what);
3571: my $now=time;
3572: my @pairs=split(/\&/,$what);
3573:
3574: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3575: if ($hashref) {
3576: foreach my $pair (@pairs) {
1.271 raeburn 3577: my ($key,$courseinfo) = split(/=/,$pair,2);
3578: $courseinfo =~ s/=/:/g;
1.384 raeburn 3579: if (defined($hashref->{$key})) {
3580: my $value = &Apache::lonnet::thaw_unescape($hashref->{$key});
3581: if (ref($value) eq 'HASH') {
3582: my @items = ('description','inst_code','owner','type');
3583: my @new_items = split(/:/,$courseinfo,-1);
3584: my %storehash;
3585: for (my $i=0; $i<@new_items; $i++) {
1.391 raeburn 3586: $storehash{$items[$i]} = &unescape($new_items[$i]);
1.384 raeburn 3587: }
3588: $hashref->{$key} =
3589: &Apache::lonnet::freeze_escape(\%storehash);
3590: my $unesc_key = &unescape($key);
3591: $hashref->{&escape('lasttime:'.$unesc_key)} = $now;
3592: next;
1.383 raeburn 3593: }
1.384 raeburn 3594: }
3595: my @current_items = split(/:/,$hashref->{$key},-1);
3596: shift(@current_items); # remove description
3597: pop(@current_items); # remove last access
3598: my $numcurrent = scalar(@current_items);
3599: if ($numcurrent > 3) {
3600: $numcurrent = 3;
3601: }
3602: my @new_items = split(/:/,$courseinfo,-1);
3603: my $numnew = scalar(@new_items);
3604: if ($numcurrent > 0) {
3605: if ($numnew <= $numcurrent) { # flushcourselogs() from pre 2.2
3606: for (my $j=$numcurrent-$numnew; $j>=0; $j--) {
3607: $courseinfo .= ':'.$current_items[$numcurrent-$j-1];
1.333 raeburn 3608: }
1.272 raeburn 3609: }
3610: }
1.384 raeburn 3611: $hashref->{$key}=$courseinfo.':'.$now;
1.234 foxr 3612: }
1.311 albertel 3613: if (&untie_domain_hash($hashref)) {
1.253 foxr 3614: &Reply( $client, "ok\n", $userinput);
1.234 foxr 3615: } else {
1.253 foxr 3616: &Failure($client, "error: ".($!+0)
1.234 foxr 3617: ." untie(GDBM) Failed ".
3618: "while attempting courseidput\n", $userinput);
3619: }
3620: } else {
1.253 foxr 3621: &Failure($client, "error: ".($!+0)
1.234 foxr 3622: ." tie(GDBM) Failed ".
3623: "while attempting courseidput\n", $userinput);
3624: }
3625:
3626: return 1;
3627: }
3628: ®ister_handler("courseidput", \&put_course_id_handler, 0, 1, 0);
3629:
1.383 raeburn 3630: sub put_course_id_hash_handler {
3631: my ($cmd, $tail, $client) = @_;
3632: my $userinput = "$cmd:$tail";
1.384 raeburn 3633: my ($udom,$mode,$what) = split(/:/, $tail,3);
1.383 raeburn 3634: chomp($what);
3635: my $now=time;
3636: my @pairs=split(/\&/,$what);
1.384 raeburn 3637: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
1.383 raeburn 3638: if ($hashref) {
3639: foreach my $pair (@pairs) {
3640: my ($key,$value)=split(/=/,$pair);
1.384 raeburn 3641: my $unesc_key = &unescape($key);
3642: if ($mode ne 'timeonly') {
3643: if (!defined($hashref->{&escape('lasttime:'.$unesc_key)})) {
3644: my $curritems = &Apache::lonnet::thaw_unescape($key);
3645: if (ref($curritems) ne 'HASH') {
3646: my @current_items = split(/:/,$hashref->{$key},-1);
3647: my $lasttime = pop(@current_items);
3648: $hashref->{&escape('lasttime:'.$unesc_key)} = $lasttime;
3649: } else {
3650: $hashref->{&escape('lasttime:'.$unesc_key)} = '';
3651: }
3652: }
3653: $hashref->{$key} = $value;
3654: }
3655: if ($mode ne 'notime') {
3656: $hashref->{&escape('lasttime:'.$unesc_key)} = $now;
3657: }
1.383 raeburn 3658: }
3659: if (&untie_domain_hash($hashref)) {
3660: &Reply($client, "ok\n", $userinput);
3661: } else {
3662: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3663: "while attempting courseidputhash\n", $userinput);
3664: }
3665: } else {
3666: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3667: "while attempting courseidputhash\n", $userinput);
3668: }
3669: return 1;
3670: }
3671: ®ister_handler("courseidputhash", \&put_course_id_hash_handler, 0, 1, 0);
3672:
1.234 foxr 3673: # Retrieves the value of a course id resource keyword pattern
3674: # defined since a starting date. Both the starting date and the
3675: # keyword pattern are optional. If the starting date is not supplied it
3676: # is treated as the beginning of time. If the pattern is not found,
3677: # it is treatred as "." matching everything.
3678: #
3679: # Parameters:
3680: # $cmd - Command keyword that resulted in us being dispatched.
3681: # $tail - The remainder of the command that, in this case, consists
3682: # of a colon separated list of:
3683: # domain - The domain in which the course database is
3684: # defined.
3685: # since - Optional parameter describing the minimum
3686: # time of definition(?) of the resources that
3687: # will match the dump.
3688: # description - regular expression that is used to filter
3689: # the dump. Only keywords matching this regexp
3690: # will be used.
1.272 raeburn 3691: # institutional code - optional supplied code to filter
3692: # the dump. Only courses with an institutional code
3693: # that match the supplied code will be returned.
1.336 raeburn 3694: # owner - optional supplied username and domain of owner to
3695: # filter the dump. Only courses for which the course
3696: # owner matches the supplied username and/or domain
3697: # will be returned. Pre-2.2.0 legacy entries from
3698: # nohist_courseiddump will only contain usernames.
1.384 raeburn 3699: # type - optional parameter for selection
1.418 raeburn 3700: # regexp_ok - if 1 or -1 allow the supplied institutional code
3701: # filter to behave as a regular expression:
3702: # 1 will not exclude the course if the instcode matches the RE
3703: # -1 will exclude the course if the instcode matches the RE
1.384 raeburn 3704: # rtn_as_hash - whether to return the information available for
3705: # each matched item as a frozen hash of all
3706: # key, value pairs in the item's hash, or as a
3707: # colon-separated list of (in order) description,
3708: # institutional code, and course owner.
1.404 raeburn 3709: # selfenrollonly - filter by courses allowing self-enrollment
3710: # now or in the future (selfenrollonly = 1).
3711: # catfilter - filter by course category, assigned to a course
3712: # using manually defined categories (i.e., not
1.407 raeburn 3713: # self-cataloging based on on institutional code).
1.404 raeburn 3714: # showhidden - include course in results even if course
1.407 raeburn 3715: # was set to be excluded from course catalog (DC only).
1.404 raeburn 3716: # caller - if set to 'coursecatalog', courses set to be hidden
3717: # from course catalog will be excluded from results (unless
3718: # overridden by "showhidden".
1.427 raeburn 3719: # cloner - escaped username:domain of course cloner (if picking course to
1.419 raeburn 3720: # clone).
3721: # cc_clone_list - escaped comma separated list of courses for which
3722: # course cloner has active CC role (and so can clone
3723: # automatically).
1.427 raeburn 3724: # cloneonly - filter by courses for which cloner has rights to clone.
3725: # createdbefore - include courses for which creation date preceeded this date.
3726: # createdafter - include courses for which creation date followed this date.
3727: # creationcontext - include courses created in specified context
1.404 raeburn 3728: #
1.234 foxr 3729: # $client - The socket open on the client.
3730: # Returns:
3731: # 1 - Continue processing.
3732: # Side Effects:
3733: # a reply is written to $client.
3734: sub dump_course_id_handler {
3735: my ($cmd, $tail, $client) = @_;
3736: my $userinput = "$cmd:$tail";
3737:
1.333 raeburn 3738: my ($udom,$since,$description,$instcodefilter,$ownerfilter,$coursefilter,
1.404 raeburn 3739: $typefilter,$regexp_ok,$rtn_as_hash,$selfenrollonly,$catfilter,$showhidden,
1.427 raeburn 3740: $caller,$cloner,$cc_clone_list,$cloneonly,$createdbefore,$createdafter,
3741: $creationcontext) =split(/:/,$tail);
1.397 raeburn 3742: my $now = time;
1.419 raeburn 3743: my ($cloneruname,$clonerudom,%cc_clone);
1.234 foxr 3744: if (defined($description)) {
3745: $description=&unescape($description);
3746: } else {
3747: $description='.';
3748: }
1.266 raeburn 3749: if (defined($instcodefilter)) {
3750: $instcodefilter=&unescape($instcodefilter);
3751: } else {
3752: $instcodefilter='.';
3753: }
1.336 raeburn 3754: my ($ownerunamefilter,$ownerdomfilter);
1.266 raeburn 3755: if (defined($ownerfilter)) {
3756: $ownerfilter=&unescape($ownerfilter);
1.336 raeburn 3757: if ($ownerfilter ne '.' && defined($ownerfilter)) {
3758: if ($ownerfilter =~ /^([^:]*):([^:]*)$/) {
3759: $ownerunamefilter = $1;
3760: $ownerdomfilter = $2;
3761: } else {
3762: $ownerunamefilter = $ownerfilter;
3763: $ownerdomfilter = '';
3764: }
3765: }
1.266 raeburn 3766: } else {
3767: $ownerfilter='.';
3768: }
1.336 raeburn 3769:
1.282 raeburn 3770: if (defined($coursefilter)) {
3771: $coursefilter=&unescape($coursefilter);
3772: } else {
3773: $coursefilter='.';
3774: }
1.333 raeburn 3775: if (defined($typefilter)) {
3776: $typefilter=&unescape($typefilter);
3777: } else {
3778: $typefilter='.';
3779: }
1.344 raeburn 3780: if (defined($regexp_ok)) {
3781: $regexp_ok=&unescape($regexp_ok);
3782: }
1.401 raeburn 3783: if (defined($catfilter)) {
3784: $catfilter=&unescape($catfilter);
3785: }
1.419 raeburn 3786: if (defined($cloner)) {
3787: $cloner = &unescape($cloner);
3788: ($cloneruname,$clonerudom) = ($cloner =~ /^($LONCAPA::match_username):($LONCAPA::match_domain)$/);
3789: }
3790: if (defined($cc_clone_list)) {
3791: $cc_clone_list = &unescape($cc_clone_list);
3792: my @cc_cloners = split('&',$cc_clone_list);
3793: foreach my $cid (@cc_cloners) {
3794: my ($clonedom,$clonenum) = split(':',$cid);
3795: next if ($clonedom ne $udom);
3796: $cc_clone{$clonedom.'_'.$clonenum} = 1;
3797: }
3798: }
1.431 raeburn 3799: if ($createdbefore ne '') {
1.427 raeburn 3800: $createdbefore = &unescape($createdbefore);
3801: } else {
3802: $createdbefore = 0;
3803: }
1.431 raeburn 3804: if ($createdafter ne '') {
1.427 raeburn 3805: $createdafter = &unescape($createdafter);
3806: } else {
3807: $createdafter = 0;
3808: }
1.431 raeburn 3809: if ($creationcontext ne '') {
1.427 raeburn 3810: $creationcontext = &unescape($creationcontext);
3811: } else {
3812: $creationcontext = '.';
3813: }
1.419 raeburn 3814:
1.384 raeburn 3815: my $unpack = 1;
3816: if ($description eq '.' && $instcodefilter eq '.' && $coursefilter eq '.' &&
3817: $typefilter eq '.') {
3818: $unpack = 0;
3819: }
3820: if (!defined($since)) { $since=0; }
1.234 foxr 3821: my $qresult='';
3822: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3823: if ($hashref) {
1.384 raeburn 3824: while (my ($key,$value) = each(%$hashref)) {
1.397 raeburn 3825: my ($unesc_key,$lasttime_key,$lasttime,$is_hash,%val,
1.427 raeburn 3826: %unesc_val,$selfenroll_end,$selfenroll_types,$created,
3827: $context);
1.384 raeburn 3828: $unesc_key = &unescape($key);
3829: if ($unesc_key =~ /^lasttime:/) {
3830: next;
3831: } else {
3832: $lasttime_key = &escape('lasttime:'.$unesc_key);
3833: }
3834: if ($hashref->{$lasttime_key} ne '') {
3835: $lasttime = $hashref->{$lasttime_key};
3836: next if ($lasttime<$since);
3837: }
1.419 raeburn 3838: my ($canclone,$valchange);
1.384 raeburn 3839: my $items = &Apache::lonnet::thaw_unescape($value);
3840: if (ref($items) eq 'HASH') {
1.429 raeburn 3841: if ($hashref->{$lasttime_key} eq '') {
1.430 raeburn 3842: next if ($since > 1);
1.429 raeburn 3843: }
1.384 raeburn 3844: $is_hash = 1;
1.419 raeburn 3845: if (defined($clonerudom)) {
3846: if ($items->{'cloners'}) {
3847: my @cloneable = split(',',$items->{'cloners'});
3848: if (@cloneable) {
3849: if (grep(/^\*$/,@cloneable)) {
3850: $canclone = 1;
3851: } elsif (grep(/^\*:\Q$clonerudom\E$/,@cloneable)) {
3852: $canclone = 1;
3853: } elsif (grep(/^\Q$cloneruname\E:\Q$clonerudom\E$/,@cloneable)) {
3854: $canclone = 1;
3855: }
3856: }
3857: unless ($canclone) {
3858: if ($cloneruname ne '' && $clonerudom ne '') {
3859: if ($cc_clone{$unesc_key}) {
3860: $canclone = 1;
3861: $items->{'cloners'} .= ','.$cloneruname.':'.
3862: $clonerudom;
3863: $valchange = 1;
3864: }
3865: }
3866: }
3867: } elsif (defined($cloneruname)) {
3868: if ($cc_clone{$unesc_key}) {
3869: $canclone = 1;
3870: $items->{'cloners'} = $cloneruname.':'.$clonerudom;
3871: $valchange = 1;
3872: }
1.437 raeburn 3873: unless ($canclone) {
3874: if ($items->{'owner'} =~ /:/) {
3875: if ($items->{'owner'} eq $cloner) {
3876: $canclone = 1;
3877: }
3878: } elsif ($cloner eq $udom.':'.$items->{'owner'}) {
3879: $canclone = 1;
3880: }
3881: if ($canclone) {
3882: $items->{'cloners'} = $cloneruname.':'.$clonerudom;
3883: $valchange = 1;
3884: }
3885: }
1.419 raeburn 3886: }
3887: }
1.384 raeburn 3888: if ($unpack || !$rtn_as_hash) {
3889: $unesc_val{'descr'} = $items->{'description'};
3890: $unesc_val{'inst_code'} = $items->{'inst_code'};
3891: $unesc_val{'owner'} = $items->{'owner'};
3892: $unesc_val{'type'} = $items->{'type'};
1.419 raeburn 3893: $unesc_val{'cloners'} = $items->{'cloners'};
1.427 raeburn 3894: $unesc_val{'created'} = $items->{'created'};
3895: $unesc_val{'context'} = $items->{'context'};
1.404 raeburn 3896: }
3897: $selfenroll_types = $items->{'selfenroll_types'};
3898: $selfenroll_end = $items->{'selfenroll_end_date'};
1.427 raeburn 3899: $created = $items->{'created'};
3900: $context = $items->{'context'};
1.404 raeburn 3901: if ($selfenrollonly) {
3902: next if (!$selfenroll_types);
3903: if (($selfenroll_end > 0) && ($selfenroll_end <= $now)) {
3904: next;
1.397 raeburn 3905: }
1.404 raeburn 3906: }
1.427 raeburn 3907: if ($creationcontext ne '.') {
3908: next if (($context ne '') && ($context ne $creationcontext));
3909: }
3910: if ($createdbefore > 0) {
3911: next if (($created eq '') || ($created > $createdbefore));
3912: }
3913: if ($createdafter > 0) {
3914: next if (($created eq '') || ($created <= $createdafter));
3915: }
1.404 raeburn 3916: if ($catfilter ne '') {
1.406 raeburn 3917: next if ($items->{'categories'} eq '');
3918: my @categories = split('&',$items->{'categories'});
1.407 raeburn 3919: next if (@categories == 0);
3920: my @subcats = split('&',$catfilter);
3921: my $matchcat = 0;
3922: foreach my $cat (@categories) {
3923: if (grep(/^\Q$cat\E$/,@subcats)) {
3924: $matchcat = 1;
3925: last;
3926: }
3927: }
3928: next if (!$matchcat);
1.404 raeburn 3929: }
3930: if ($caller eq 'coursecatalog') {
1.405 raeburn 3931: if ($items->{'hidefromcat'} eq 'yes') {
3932: next if !$showhidden;
1.401 raeburn 3933: }
1.384 raeburn 3934: }
1.383 raeburn 3935: } else {
1.401 raeburn 3936: next if ($catfilter ne '');
1.419 raeburn 3937: next if ($selfenrollonly);
1.427 raeburn 3938: next if ($createdbefore || $createdafter);
3939: next if ($creationcontext ne '.');
1.419 raeburn 3940: if ((defined($clonerudom)) && (defined($cloneruname))) {
3941: if ($cc_clone{$unesc_key}) {
3942: $canclone = 1;
3943: $val{'cloners'} = &escape($cloneruname.':'.$clonerudom);
3944: }
3945: }
1.384 raeburn 3946: $is_hash = 0;
1.388 raeburn 3947: my @courseitems = split(/:/,$value);
1.403 raeburn 3948: $lasttime = pop(@courseitems);
1.402 raeburn 3949: if ($hashref->{$lasttime_key} eq '') {
3950: next if ($lasttime<$since);
3951: }
1.384 raeburn 3952: ($val{'descr'},$val{'inst_code'},$val{'owner'},$val{'type'}) = @courseitems;
1.383 raeburn 3953: }
1.419 raeburn 3954: if ($cloneonly) {
3955: next unless ($canclone);
3956: }
1.266 raeburn 3957: my $match = 1;
1.384 raeburn 3958: if ($description ne '.') {
3959: if (!$is_hash) {
3960: $unesc_val{'descr'} = &unescape($val{'descr'});
3961: }
3962: if (eval{$unesc_val{'descr'} !~ /\Q$description\E/i}) {
1.266 raeburn 3963: $match = 0;
1.384 raeburn 3964: }
1.266 raeburn 3965: }
1.384 raeburn 3966: if ($instcodefilter ne '.') {
3967: if (!$is_hash) {
3968: $unesc_val{'inst_code'} = &unescape($val{'inst_code'});
3969: }
1.418 raeburn 3970: if ($regexp_ok == 1) {
1.384 raeburn 3971: if (eval{$unesc_val{'inst_code'} !~ /$instcodefilter/}) {
1.344 raeburn 3972: $match = 0;
3973: }
1.418 raeburn 3974: } elsif ($regexp_ok == -1) {
3975: if (eval{$unesc_val{'inst_code'} =~ /$instcodefilter/}) {
3976: $match = 0;
3977: }
1.344 raeburn 3978: } else {
1.384 raeburn 3979: if (eval{$unesc_val{'inst_code'} !~ /\Q$instcodefilter\E/i}) {
1.344 raeburn 3980: $match = 0;
3981: }
1.266 raeburn 3982: }
1.234 foxr 3983: }
1.384 raeburn 3984: if ($ownerfilter ne '.') {
3985: if (!$is_hash) {
3986: $unesc_val{'owner'} = &unescape($val{'owner'});
3987: }
1.336 raeburn 3988: if (($ownerunamefilter ne '') && ($ownerdomfilter ne '')) {
1.384 raeburn 3989: if ($unesc_val{'owner'} =~ /:/) {
3990: if (eval{$unesc_val{'owner'} !~
3991: /\Q$ownerunamefilter\E:\Q$ownerdomfilter\E$/i}) {
1.336 raeburn 3992: $match = 0;
3993: }
3994: } else {
1.384 raeburn 3995: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) {
1.336 raeburn 3996: $match = 0;
3997: }
3998: }
3999: } elsif ($ownerunamefilter ne '') {
1.384 raeburn 4000: if ($unesc_val{'owner'} =~ /:/) {
4001: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E:[^:]+$/i}) {
1.336 raeburn 4002: $match = 0;
4003: }
4004: } else {
1.384 raeburn 4005: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) {
1.336 raeburn 4006: $match = 0;
4007: }
4008: }
4009: } elsif ($ownerdomfilter ne '') {
1.384 raeburn 4010: if ($unesc_val{'owner'} =~ /:/) {
4011: if (eval{$unesc_val{'owner'} !~ /^[^:]+:\Q$ownerdomfilter\E/}) {
1.336 raeburn 4012: $match = 0;
4013: }
4014: } else {
4015: if ($ownerdomfilter ne $udom) {
4016: $match = 0;
4017: }
4018: }
1.266 raeburn 4019: }
4020: }
1.384 raeburn 4021: if ($coursefilter ne '.') {
4022: if (eval{$unesc_key !~ /^$udom(_)\Q$coursefilter\E$/}) {
1.282 raeburn 4023: $match = 0;
4024: }
4025: }
1.384 raeburn 4026: if ($typefilter ne '.') {
4027: if (!$is_hash) {
4028: $unesc_val{'type'} = &unescape($val{'type'});
4029: }
4030: if ($unesc_val{'type'} eq '') {
1.333 raeburn 4031: if ($typefilter ne 'Course') {
4032: $match = 0;
4033: }
1.383 raeburn 4034: } else {
1.384 raeburn 4035: if (eval{$unesc_val{'type'} !~ /^\Q$typefilter\E$/}) {
1.333 raeburn 4036: $match = 0;
4037: }
4038: }
4039: }
1.266 raeburn 4040: if ($match == 1) {
1.384 raeburn 4041: if ($rtn_as_hash) {
4042: if ($is_hash) {
1.419 raeburn 4043: if ($valchange) {
4044: my $newvalue = &Apache::lonnet::freeze_escape($items);
4045: $qresult.=$key.'='.$newvalue.'&';
4046: } else {
4047: $qresult.=$key.'='.$value.'&';
4048: }
1.384 raeburn 4049: } else {
1.388 raeburn 4050: my %rtnhash = ( 'description' => &unescape($val{'descr'}),
4051: 'inst_code' => &unescape($val{'inst_code'}),
4052: 'owner' => &unescape($val{'owner'}),
4053: 'type' => &unescape($val{'type'}),
1.419 raeburn 4054: 'cloners' => &unescape($val{'cloners'}),
1.384 raeburn 4055: );
4056: my $items = &Apache::lonnet::freeze_escape(\%rtnhash);
4057: $qresult.=$key.'='.$items.'&';
4058: }
1.383 raeburn 4059: } else {
1.384 raeburn 4060: if ($is_hash) {
4061: $qresult .= $key.'='.&escape($unesc_val{'descr'}).':'.
4062: &escape($unesc_val{'inst_code'}).':'.
4063: &escape($unesc_val{'owner'}).'&';
4064: } else {
4065: $qresult .= $key.'='.$val{'descr'}.':'.$val{'inst_code'}.
4066: ':'.$val{'owner'}.'&';
4067: }
1.383 raeburn 4068: }
1.266 raeburn 4069: }
1.234 foxr 4070: }
1.311 albertel 4071: if (&untie_domain_hash($hashref)) {
1.234 foxr 4072: chop($qresult);
1.387 albertel 4073: &Reply($client, \$qresult, $userinput);
1.234 foxr 4074: } else {
4075: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4076: "while attempting courseiddump\n", $userinput);
4077: }
4078: } else {
4079: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4080: "while attempting courseiddump\n", $userinput);
4081: }
4082: return 1;
4083: }
4084: ®ister_handler("courseiddump", \&dump_course_id_handler, 0, 1, 0);
1.238 foxr 4085:
1.438 ! raeburn 4086: sub course_lastaccess_handler {
! 4087: my ($cmd, $tail, $client) = @_;
! 4088: my $userinput = "$cmd:$tail";
! 4089: my ($cdom,$cnum) = split(':',$tail);
! 4090: my (%lastaccess,$qresult);
! 4091: my $hashref = &tie_domain_hash($cdom, "nohist_courseids", &GDBM_WRCREAT());
! 4092: if ($hashref) {
! 4093: while (my ($key,$value) = each(%$hashref)) {
! 4094: my ($unesc_key,$lasttime);
! 4095: $unesc_key = &unescape($key);
! 4096: if ($cnum) {
! 4097: next unless ($unesc_key =~ /\Q$cdom\E_\Q$cnum\E$/);
! 4098: }
! 4099: if ($unesc_key =~ /^lasttime:($LONCAPA::match_domain\_$LONCAPA::match_courseid)/) {
! 4100: $lastaccess{$1} = $value;
! 4101: } else {
! 4102: my $items = &Apache::lonnet::thaw_unescape($value);
! 4103: if (ref($items) eq 'HASH') {
! 4104: unless ($lastaccess{$unesc_key}) {
! 4105: $lastaccess{$unesc_key} = '';
! 4106: }
! 4107: } else {
! 4108: my @courseitems = split(':',$value);
! 4109: $lastaccess{$unesc_key} = pop(@courseitems);
! 4110: }
! 4111: }
! 4112: }
! 4113: foreach my $cid (sort(keys(%lastaccess))) {
! 4114: $qresult.=&escape($cid).'='.$lastaccess{$cid}.'&';
! 4115: }
! 4116: if (&untie_domain_hash($hashref)) {
! 4117: if ($qresult) {
! 4118: chop($qresult);
! 4119: }
! 4120: &Reply($client, \$qresult, $userinput);
! 4121: } else {
! 4122: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
! 4123: "while attempting lastacourseaccess\n", $userinput);
! 4124: }
! 4125: } else {
! 4126: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
! 4127: "while attempting lastcourseaccess\n", $userinput);
! 4128: }
! 4129: return 1;
! 4130: }
! 4131: ®ister_handler("courselastaccess",\&course_lastaccess_handler, 0, 1, 0);
! 4132:
1.238 foxr 4133: #
1.348 raeburn 4134: # Puts an unencrypted entry in a namespace db file at the domain level
4135: #
4136: # Parameters:
4137: # $cmd - The command that got us here.
4138: # $tail - Tail of the command (remaining parameters).
4139: # $client - File descriptor connected to client.
4140: # Returns
4141: # 0 - Requested to exit, caller should shut down.
4142: # 1 - Continue processing.
4143: # Side effects:
4144: # reply is written to $client.
4145: #
4146: sub put_domain_handler {
4147: my ($cmd,$tail,$client) = @_;
4148:
4149: my $userinput = "$cmd:$tail";
4150:
4151: my ($udom,$namespace,$what) =split(/:/,$tail,3);
4152: chomp($what);
4153: my @pairs=split(/\&/,$what);
4154: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_WRCREAT(),
4155: "P", $what);
4156: if ($hashref) {
4157: foreach my $pair (@pairs) {
4158: my ($key,$value)=split(/=/,$pair);
4159: $hashref->{$key}=$value;
4160: }
4161: if (&untie_domain_hash($hashref)) {
4162: &Reply($client, "ok\n", $userinput);
4163: } else {
4164: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4165: "while attempting putdom\n", $userinput);
4166: }
4167: } else {
4168: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4169: "while attempting putdom\n", $userinput);
4170: }
4171:
4172: return 1;
4173: }
4174: ®ister_handler("putdom", \&put_domain_handler, 0, 1, 0);
4175:
4176: # Unencrypted get from the namespace database file at the domain level.
4177: # This function retrieves a keyed item from a specific named database in the
4178: # domain directory.
4179: #
4180: # Parameters:
4181: # $cmd - Command request keyword (get).
4182: # $tail - Tail of the command. This is a colon separated list
4183: # consisting of the domain and the 'namespace'
4184: # which selects the gdbm file to do the lookup in,
4185: # & separated list of keys to lookup. Note that
4186: # the values are returned as an & separated list too.
4187: # $client - File descriptor open on the client.
4188: # Returns:
4189: # 1 - Continue processing.
4190: # 0 - Exit.
4191: # Side effects:
4192: # reply is written to $client.
4193: #
4194:
4195: sub get_domain_handler {
4196: my ($cmd, $tail, $client) = @_;
4197:
4198: my $userinput = "$client:$tail";
4199:
4200: my ($udom,$namespace,$what)=split(/:/,$tail,3);
4201: chomp($what);
4202: my @queries=split(/\&/,$what);
4203: my $qresult='';
4204: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_READER());
4205: if ($hashref) {
4206: for (my $i=0;$i<=$#queries;$i++) {
4207: $qresult.="$hashref->{$queries[$i]}&";
4208: }
4209: if (&untie_domain_hash($hashref)) {
4210: $qresult=~s/\&$//;
1.387 albertel 4211: &Reply($client, \$qresult, $userinput);
1.348 raeburn 4212: } else {
4213: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
4214: "while attempting getdom\n",$userinput);
4215: }
4216: } else {
4217: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4218: "while attempting getdom\n",$userinput);
4219: }
4220:
4221: return 1;
4222: }
1.360 raeburn 4223: ®ister_handler("getdom", \&get_domain_handler, 0, 1, 0);
1.348 raeburn 4224:
1.420 raeburn 4225: #
1.238 foxr 4226: # Puts an id to a domains id database.
4227: #
4228: # Parameters:
4229: # $cmd - The command that triggered us.
4230: # $tail - Remainder of the request other than the command. This is a
4231: # colon separated list containing:
4232: # $domain - The domain for which we are writing the id.
4233: # $pairs - The id info to write... this is and & separated list
4234: # of keyword=value.
4235: # $client - Socket open on the client.
4236: # Returns:
4237: # 1 - Continue processing.
4238: # Side effects:
4239: # reply is written to $client.
4240: #
4241: sub put_id_handler {
4242: my ($cmd,$tail,$client) = @_;
4243:
4244:
4245: my $userinput = "$cmd:$tail";
4246:
4247: my ($udom,$what)=split(/:/,$tail);
4248: chomp($what);
4249: my @pairs=split(/\&/,$what);
4250: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
4251: "P", $what);
4252: if ($hashref) {
4253: foreach my $pair (@pairs) {
4254: my ($key,$value)=split(/=/,$pair);
4255: $hashref->{$key}=$value;
4256: }
1.311 albertel 4257: if (&untie_domain_hash($hashref)) {
1.238 foxr 4258: &Reply($client, "ok\n", $userinput);
4259: } else {
4260: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4261: "while attempting idput\n", $userinput);
4262: }
4263: } else {
4264: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4265: "while attempting idput\n", $userinput);
4266: }
4267:
4268: return 1;
4269: }
1.263 albertel 4270: ®ister_handler("idput", \&put_id_handler, 0, 1, 0);
1.238 foxr 4271:
4272: #
4273: # Retrieves a set of id values from the id database.
4274: # Returns an & separated list of results, one for each requested id to the
4275: # client.
4276: #
4277: # Parameters:
4278: # $cmd - Command keyword that caused us to be dispatched.
4279: # $tail - Tail of the command. Consists of a colon separated:
4280: # domain - the domain whose id table we dump
4281: # ids Consists of an & separated list of
4282: # id keywords whose values will be fetched.
4283: # nonexisting keywords will have an empty value.
4284: # $client - Socket open on the client.
4285: #
4286: # Returns:
4287: # 1 - indicating processing should continue.
4288: # Side effects:
4289: # An & separated list of results is written to $client.
4290: #
4291: sub get_id_handler {
4292: my ($cmd, $tail, $client) = @_;
4293:
4294:
4295: my $userinput = "$client:$tail";
4296:
4297: my ($udom,$what)=split(/:/,$tail);
4298: chomp($what);
4299: my @queries=split(/\&/,$what);
4300: my $qresult='';
4301: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_READER());
4302: if ($hashref) {
4303: for (my $i=0;$i<=$#queries;$i++) {
4304: $qresult.="$hashref->{$queries[$i]}&";
4305: }
1.311 albertel 4306: if (&untie_domain_hash($hashref)) {
1.238 foxr 4307: $qresult=~s/\&$//;
1.387 albertel 4308: &Reply($client, \$qresult, $userinput);
1.238 foxr 4309: } else {
4310: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
4311: "while attempting idget\n",$userinput);
4312: }
4313: } else {
4314: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4315: "while attempting idget\n",$userinput);
4316: }
4317:
4318: return 1;
4319: }
1.263 albertel 4320: ®ister_handler("idget", \&get_id_handler, 0, 1, 0);
1.238 foxr 4321:
4322: #
1.299 raeburn 4323: # Puts broadcast e-mail sent by Domain Coordinator in nohist_dcmail database
4324: #
4325: # Parameters
4326: # $cmd - Command keyword that caused us to be dispatched.
4327: # $tail - Tail of the command. Consists of a colon separated:
4328: # domain - the domain whose dcmail we are recording
4329: # email Consists of key=value pair
4330: # where key is unique msgid
4331: # and value is message (in XML)
4332: # $client - Socket open on the client.
4333: #
4334: # Returns:
4335: # 1 - indicating processing should continue.
4336: # Side effects
4337: # reply is written to $client.
4338: #
4339: sub put_dcmail_handler {
4340: my ($cmd,$tail,$client) = @_;
4341: my $userinput = "$cmd:$tail";
4342:
4343: my ($udom,$what)=split(/:/,$tail);
4344: chomp($what);
4345: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
4346: if ($hashref) {
4347: my ($key,$value)=split(/=/,$what);
4348: $hashref->{$key}=$value;
4349: }
1.311 albertel 4350: if (&untie_domain_hash($hashref)) {
1.299 raeburn 4351: &Reply($client, "ok\n", $userinput);
4352: } else {
4353: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4354: "while attempting dcmailput\n", $userinput);
4355: }
4356: return 1;
4357: }
4358: ®ister_handler("dcmailput", \&put_dcmail_handler, 0, 1, 0);
4359:
4360: #
4361: # Retrieves broadcast e-mail from nohist_dcmail database
4362: # Returns to client an & separated list of key=value pairs,
4363: # where key is msgid and value is message information.
4364: #
4365: # Parameters
4366: # $cmd - Command keyword that caused us to be dispatched.
4367: # $tail - Tail of the command. Consists of a colon separated:
4368: # domain - the domain whose dcmail table we dump
4369: # startfilter - beginning of time window
4370: # endfilter - end of time window
4371: # sendersfilter - & separated list of username:domain
4372: # for senders to search for.
4373: # $client - Socket open on the client.
4374: #
4375: # Returns:
4376: # 1 - indicating processing should continue.
4377: # Side effects
4378: # reply (& separated list of msgid=messageinfo pairs) is
4379: # written to $client.
4380: #
4381: sub dump_dcmail_handler {
4382: my ($cmd, $tail, $client) = @_;
4383:
4384: my $userinput = "$cmd:$tail";
4385: my ($udom,$startfilter,$endfilter,$sendersfilter) = split(/:/,$tail);
4386: chomp($sendersfilter);
4387: my @senders = ();
4388: if (defined($startfilter)) {
4389: $startfilter=&unescape($startfilter);
4390: } else {
4391: $startfilter='.';
4392: }
4393: if (defined($endfilter)) {
4394: $endfilter=&unescape($endfilter);
4395: } else {
4396: $endfilter='.';
4397: }
4398: if (defined($sendersfilter)) {
4399: $sendersfilter=&unescape($sendersfilter);
1.300 albertel 4400: @senders = map { &unescape($_) } split(/\&/,$sendersfilter);
1.299 raeburn 4401: }
4402:
4403: my $qresult='';
4404: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
4405: if ($hashref) {
4406: while (my ($key,$value) = each(%$hashref)) {
4407: my $match = 1;
1.303 albertel 4408: my ($timestamp,$subj,$uname,$udom) =
4409: split(/:/,&unescape(&unescape($key)),5); # yes, twice really
1.299 raeburn 4410: $subj = &unescape($subj);
4411: unless ($startfilter eq '.' || !defined($startfilter)) {
4412: if ($timestamp < $startfilter) {
4413: $match = 0;
4414: }
4415: }
4416: unless ($endfilter eq '.' || !defined($endfilter)) {
4417: if ($timestamp > $endfilter) {
4418: $match = 0;
4419: }
4420: }
4421: unless (@senders < 1) {
4422: unless (grep/^$uname:$udom$/,@senders) {
4423: $match = 0;
4424: }
4425: }
4426: if ($match == 1) {
4427: $qresult.=$key.'='.$value.'&';
4428: }
4429: }
1.311 albertel 4430: if (&untie_domain_hash($hashref)) {
1.299 raeburn 4431: chop($qresult);
1.387 albertel 4432: &Reply($client, \$qresult, $userinput);
1.299 raeburn 4433: } else {
4434: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4435: "while attempting dcmaildump\n", $userinput);
4436: }
4437: } else {
4438: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4439: "while attempting dcmaildump\n", $userinput);
4440: }
4441: return 1;
4442: }
4443:
4444: ®ister_handler("dcmaildump", \&dump_dcmail_handler, 0, 1, 0);
4445:
4446: #
4447: # Puts domain roles in nohist_domainroles database
4448: #
4449: # Parameters
4450: # $cmd - Command keyword that caused us to be dispatched.
4451: # $tail - Tail of the command. Consists of a colon separated:
4452: # domain - the domain whose roles we are recording
4453: # role - Consists of key=value pair
4454: # where key is unique role
4455: # and value is start/end date information
4456: # $client - Socket open on the client.
4457: #
4458: # Returns:
4459: # 1 - indicating processing should continue.
4460: # Side effects
4461: # reply is written to $client.
4462: #
4463:
4464: sub put_domainroles_handler {
4465: my ($cmd,$tail,$client) = @_;
4466:
4467: my $userinput = "$cmd:$tail";
4468: my ($udom,$what)=split(/:/,$tail);
4469: chomp($what);
4470: my @pairs=split(/\&/,$what);
4471: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
4472: if ($hashref) {
4473: foreach my $pair (@pairs) {
4474: my ($key,$value)=split(/=/,$pair);
4475: $hashref->{$key}=$value;
4476: }
1.311 albertel 4477: if (&untie_domain_hash($hashref)) {
1.299 raeburn 4478: &Reply($client, "ok\n", $userinput);
4479: } else {
4480: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4481: "while attempting domroleput\n", $userinput);
4482: }
4483: } else {
4484: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
4485: "while attempting domroleput\n", $userinput);
4486: }
4487:
4488: return 1;
4489: }
4490:
4491: ®ister_handler("domroleput", \&put_domainroles_handler, 0, 1, 0);
4492:
4493: #
4494: # Retrieves domain roles from nohist_domainroles database
4495: # Returns to client an & separated list of key=value pairs,
4496: # where key is role and value is start and end date information.
4497: #
4498: # Parameters
4499: # $cmd - Command keyword that caused us to be dispatched.
4500: # $tail - Tail of the command. Consists of a colon separated:
4501: # domain - the domain whose domain roles table we dump
4502: # $client - Socket open on the client.
4503: #
4504: # Returns:
4505: # 1 - indicating processing should continue.
4506: # Side effects
4507: # reply (& separated list of role=start/end info pairs) is
4508: # written to $client.
4509: #
4510: sub dump_domainroles_handler {
4511: my ($cmd, $tail, $client) = @_;
4512:
4513: my $userinput = "$cmd:$tail";
4514: my ($udom,$startfilter,$endfilter,$rolesfilter) = split(/:/,$tail);
4515: chomp($rolesfilter);
4516: my @roles = ();
4517: if (defined($startfilter)) {
4518: $startfilter=&unescape($startfilter);
4519: } else {
4520: $startfilter='.';
4521: }
4522: if (defined($endfilter)) {
4523: $endfilter=&unescape($endfilter);
4524: } else {
4525: $endfilter='.';
4526: }
4527: if (defined($rolesfilter)) {
4528: $rolesfilter=&unescape($rolesfilter);
1.300 albertel 4529: @roles = split(/\&/,$rolesfilter);
1.299 raeburn 4530: }
1.421 raeburn 4531:
1.299 raeburn 4532: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
4533: if ($hashref) {
4534: my $qresult = '';
4535: while (my ($key,$value) = each(%$hashref)) {
4536: my $match = 1;
1.421 raeburn 4537: my ($end,$start) = split(/:/,&unescape($value));
1.299 raeburn 4538: my ($trole,$uname,$udom,$runame,$rudom,$rsec) = split(/:/,&unescape($key));
1.421 raeburn 4539: unless (@roles < 1) {
4540: unless (grep/^\Q$trole\E$/,@roles) {
4541: $match = 0;
4542: next;
4543: }
4544: }
1.299 raeburn 4545: unless ($startfilter eq '.' || !defined($startfilter)) {
1.415 raeburn 4546: if ((defined($start)) && ($start >= $startfilter)) {
1.299 raeburn 4547: $match = 0;
1.421 raeburn 4548: next;
1.299 raeburn 4549: }
4550: }
4551: unless ($endfilter eq '.' || !defined($endfilter)) {
1.421 raeburn 4552: if ((defined($end)) && (($end > 0) && ($end <= $endfilter))) {
1.299 raeburn 4553: $match = 0;
1.421 raeburn 4554: next;
1.299 raeburn 4555: }
4556: }
4557: if ($match == 1) {
4558: $qresult.=$key.'='.$value.'&';
4559: }
4560: }
1.311 albertel 4561: if (&untie_domain_hash($hashref)) {
1.299 raeburn 4562: chop($qresult);
1.387 albertel 4563: &Reply($client, \$qresult, $userinput);
1.299 raeburn 4564: } else {
4565: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
4566: "while attempting domrolesdump\n", $userinput);
4567: }
4568: } else {
4569: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
4570: "while attempting domrolesdump\n", $userinput);
4571: }
4572: return 1;
4573: }
4574:
4575: ®ister_handler("domrolesdump", \&dump_domainroles_handler, 0, 1, 0);
4576:
4577:
1.238 foxr 4578: # Process the tmpput command I'm not sure what this does.. Seems to
4579: # create a file in the lonDaemons/tmp directory of the form $id.tmp
4580: # where Id is the client's ip concatenated with a sequence number.
4581: # The file will contain some value that is passed in. Is this e.g.
4582: # a login token?
4583: #
4584: # Parameters:
4585: # $cmd - The command that got us dispatched.
4586: # $tail - The remainder of the request following $cmd:
4587: # In this case this will be the contents of the file.
4588: # $client - Socket connected to the client.
4589: # Returns:
4590: # 1 indicating processing can continue.
4591: # Side effects:
4592: # A file is created in the local filesystem.
4593: # A reply is sent to the client.
4594: sub tmp_put_handler {
4595: my ($cmd, $what, $client) = @_;
4596:
4597: my $userinput = "$cmd:$what"; # Reconstruct for logging.
4598:
1.347 raeburn 4599: my ($record,$context) = split(/:/,$what);
4600: if ($context ne '') {
4601: chomp($context);
4602: $context = &unescape($context);
4603: }
4604: my ($id,$store);
1.238 foxr 4605: $tmpsnum++;
1.347 raeburn 4606: if ($context eq 'resetpw') {
4607: $id = &md5_hex(&md5_hex(time.{}.rand().$$));
4608: } else {
4609: $id = $$.'_'.$clientip.'_'.$tmpsnum;
4610: }
1.238 foxr 4611: $id=~s/\W/\_/g;
1.347 raeburn 4612: $record=~s/\n//g;
1.238 foxr 4613: my $execdir=$perlvar{'lonDaemons'};
4614: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
1.347 raeburn 4615: print $store $record;
1.238 foxr 4616: close $store;
1.387 albertel 4617: &Reply($client, \$id, $userinput);
1.238 foxr 4618: } else {
4619: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
4620: "while attempting tmpput\n", $userinput);
4621: }
4622: return 1;
4623:
4624: }
4625: ®ister_handler("tmpput", \&tmp_put_handler, 0, 1, 0);
1.263 albertel 4626:
1.238 foxr 4627: # Processes the tmpget command. This command returns the contents
4628: # of a temporary resource file(?) created via tmpput.
4629: #
4630: # Paramters:
4631: # $cmd - Command that got us dispatched.
4632: # $id - Tail of the command, contain the id of the resource
4633: # we want to fetch.
4634: # $client - socket open on the client.
4635: # Return:
4636: # 1 - Inidcating processing can continue.
4637: # Side effects:
4638: # A reply is sent to the client.
4639: #
4640: sub tmp_get_handler {
4641: my ($cmd, $id, $client) = @_;
4642:
4643: my $userinput = "$cmd:$id";
4644:
4645:
4646: $id=~s/\W/\_/g;
4647: my $store;
4648: my $execdir=$perlvar{'lonDaemons'};
4649: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
4650: my $reply=<$store>;
1.387 albertel 4651: &Reply( $client, \$reply, $userinput);
1.238 foxr 4652: close $store;
4653: } else {
4654: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
4655: "while attempting tmpget\n", $userinput);
4656: }
4657:
4658: return 1;
4659: }
4660: ®ister_handler("tmpget", \&tmp_get_handler, 0, 1, 0);
1.263 albertel 4661:
1.238 foxr 4662: #
4663: # Process the tmpdel command. This command deletes a temp resource
4664: # created by the tmpput command.
4665: #
4666: # Parameters:
4667: # $cmd - Command that got us here.
4668: # $id - Id of the temporary resource created.
4669: # $client - socket open on the client process.
4670: #
4671: # Returns:
4672: # 1 - Indicating processing should continue.
4673: # Side Effects:
4674: # A file is deleted
4675: # A reply is sent to the client.
4676: sub tmp_del_handler {
4677: my ($cmd, $id, $client) = @_;
4678:
4679: my $userinput= "$cmd:$id";
4680:
4681: chomp($id);
4682: $id=~s/\W/\_/g;
4683: my $execdir=$perlvar{'lonDaemons'};
4684: if (unlink("$execdir/tmp/$id.tmp")) {
4685: &Reply($client, "ok\n", $userinput);
4686: } else {
4687: &Failure( $client, "error: ".($!+0)."Unlink tmp Failed ".
4688: "while attempting tmpdel\n", $userinput);
4689: }
4690:
4691: return 1;
4692:
4693: }
4694: ®ister_handler("tmpdel", \&tmp_del_handler, 0, 1, 0);
1.263 albertel 4695:
1.238 foxr 4696: #
1.246 foxr 4697: # Processes the setannounce command. This command
4698: # creates a file named announce.txt in the top directory of
4699: # the documentn root and sets its contents. The announce.txt file is
4700: # printed in its entirety at the LonCAPA login page. Note:
4701: # once the announcement.txt fileis created it cannot be deleted.
4702: # However, setting the contents of the file to empty removes the
4703: # announcement from the login page of loncapa so who cares.
4704: #
4705: # Parameters:
4706: # $cmd - The command that got us dispatched.
4707: # $announcement - The text of the announcement.
4708: # $client - Socket open on the client process.
4709: # Retunrns:
4710: # 1 - Indicating request processing should continue
4711: # Side Effects:
4712: # The file {DocRoot}/announcement.txt is created.
4713: # A reply is sent to $client.
4714: #
4715: sub set_announce_handler {
4716: my ($cmd, $announcement, $client) = @_;
4717:
4718: my $userinput = "$cmd:$announcement";
4719:
4720: chomp($announcement);
4721: $announcement=&unescape($announcement);
4722: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
4723: '/announcement.txt')) {
4724: print $store $announcement;
4725: close $store;
4726: &Reply($client, "ok\n", $userinput);
4727: } else {
4728: &Failure($client, "error: ".($!+0)."\n", $userinput);
4729: }
4730:
4731: return 1;
4732: }
4733: ®ister_handler("setannounce", \&set_announce_handler, 0, 1, 0);
1.263 albertel 4734:
1.246 foxr 4735: #
4736: # Return the version of the daemon. This can be used to determine
4737: # the compatibility of cross version installations or, alternatively to
4738: # simply know who's out of date and who isn't. Note that the version
4739: # is returned concatenated with the tail.
4740: # Parameters:
4741: # $cmd - the request that dispatched to us.
4742: # $tail - Tail of the request (client's version?).
4743: # $client - Socket open on the client.
4744: #Returns:
4745: # 1 - continue processing requests.
4746: # Side Effects:
4747: # Replies with version to $client.
4748: sub get_version_handler {
4749: my ($cmd, $tail, $client) = @_;
4750:
4751: my $userinput = $cmd.$tail;
4752:
4753: &Reply($client, &version($userinput)."\n", $userinput);
4754:
4755:
4756: return 1;
4757: }
4758: ®ister_handler("version", \&get_version_handler, 0, 1, 0);
1.263 albertel 4759:
1.246 foxr 4760: # Set the current host and domain. This is used to support
4761: # multihomed systems. Each IP of the system, or even separate daemons
4762: # on the same IP can be treated as handling a separate lonCAPA virtual
4763: # machine. This command selects the virtual lonCAPA. The client always
4764: # knows the right one since it is lonc and it is selecting the domain/system
4765: # from the hosts.tab file.
4766: # Parameters:
4767: # $cmd - Command that dispatched us.
4768: # $tail - Tail of the command (domain/host requested).
4769: # $socket - Socket open on the client.
4770: #
4771: # Returns:
4772: # 1 - Indicates the program should continue to process requests.
4773: # Side-effects:
4774: # The default domain/system context is modified for this daemon.
4775: # a reply is sent to the client.
4776: #
4777: sub set_virtual_host_handler {
4778: my ($cmd, $tail, $socket) = @_;
4779:
4780: my $userinput ="$cmd:$tail";
4781:
4782: &Reply($client, &sethost($userinput)."\n", $userinput);
4783:
4784:
4785: return 1;
4786: }
1.247 albertel 4787: ®ister_handler("sethost", \&set_virtual_host_handler, 0, 1, 0);
1.246 foxr 4788:
4789: # Process a request to exit:
4790: # - "bye" is sent to the client.
4791: # - The client socket is shutdown and closed.
4792: # - We indicate to the caller that we should exit.
4793: # Formal Parameters:
4794: # $cmd - The command that got us here.
4795: # $tail - Tail of the command (empty).
4796: # $client - Socket open on the tail.
4797: # Returns:
4798: # 0 - Indicating the program should exit!!
4799: #
4800: sub exit_handler {
4801: my ($cmd, $tail, $client) = @_;
4802:
4803: my $userinput = "$cmd:$tail";
4804:
4805: &logthis("Client $clientip ($clientname) hanging up: $userinput");
4806: &Reply($client, "bye\n", $userinput);
4807: $client->shutdown(2); # shutdown the socket forcibly.
4808: $client->close();
4809:
4810: return 0;
4811: }
1.248 foxr 4812: ®ister_handler("exit", \&exit_handler, 0,1,1);
4813: ®ister_handler("init", \&exit_handler, 0,1,1);
4814: ®ister_handler("quit", \&exit_handler, 0,1,1);
4815:
4816: # Determine if auto-enrollment is enabled.
4817: # Note that the original had what I believe to be a defect.
4818: # The original returned 0 if the requestor was not a registerd client.
4819: # It should return "refused".
4820: # Formal Parameters:
4821: # $cmd - The command that invoked us.
4822: # $tail - The tail of the command (Extra command parameters.
4823: # $client - The socket open on the client that issued the request.
4824: # Returns:
4825: # 1 - Indicating processing should continue.
4826: #
4827: sub enrollment_enabled_handler {
4828: my ($cmd, $tail, $client) = @_;
4829: my $userinput = $cmd.":".$tail; # For logging purposes.
4830:
4831:
1.337 albertel 4832: my ($cdom) = split(/:/, $tail, 2); # Domain we're asking about.
4833:
1.248 foxr 4834: my $outcome = &localenroll::run($cdom);
1.387 albertel 4835: &Reply($client, \$outcome, $userinput);
1.248 foxr 4836:
4837: return 1;
4838: }
4839: ®ister_handler("autorun", \&enrollment_enabled_handler, 0, 1, 0);
4840:
1.417 raeburn 4841: #
1.423 raeburn 4842: # Validate an institutional code used for a LON-CAPA course.
1.417 raeburn 4843: #
4844: # Formal Parameters:
4845: # $cmd - The command request that got us dispatched.
4846: # $tail - The tail of the command. In this case,
4847: # this is a colon separated set of words that will be split
4848: # into:
1.424 raeburn 4849: # $dom - The domain for which the check of
4850: # institutional course code will occur.
4851: #
4852: # $instcode - The institutional code for the course
4853: # being requested, or validated for rights
4854: # to request.
4855: #
4856: # $owner - The course requestor (who will be the
4857: # course owner, in the form username:domain
4858: #
1.417 raeburn 4859: # $client - Socket open on the client.
4860: # Returns:
4861: # 1 - Indicating processing should continue.
4862: #
4863: sub validate_instcode_handler {
4864: my ($cmd, $tail, $client) = @_;
4865: my $userinput = "$cmd:$tail";
1.423 raeburn 4866: my ($dom,$instcode,$owner) = split(/:/, $tail);
1.422 raeburn 4867: $instcode = &unescape($instcode);
4868: $owner = &unescape($owner);
1.426 raeburn 4869: my ($outcome,$description) =
4870: &localenroll::validate_instcode($dom,$instcode,$owner);
4871: my $result = &escape($outcome).'&'.&escape($description);
4872: &Reply($client, \$result, $userinput);
1.417 raeburn 4873:
4874: return 1;
4875: }
4876: ®ister_handler("autovalidateinstcode", \&validate_instcode_handler, 0, 1, 0);
4877:
1.248 foxr 4878: # Get the official sections for which auto-enrollment is possible.
4879: # Since the admin people won't know about 'unofficial sections'
4880: # we cannot auto-enroll on them.
4881: # Formal Parameters:
4882: # $cmd - The command request that got us dispatched here.
4883: # $tail - The remainder of the request. In our case this
4884: # will be split into:
4885: # $coursecode - The course name from the admin point of view.
4886: # $cdom - The course's domain(?).
4887: # $client - Socket open on the client.
4888: # Returns:
4889: # 1 - Indiciting processing should continue.
4890: #
4891: sub get_sections_handler {
4892: my ($cmd, $tail, $client) = @_;
4893: my $userinput = "$cmd:$tail";
4894:
4895: my ($coursecode, $cdom) = split(/:/, $tail);
4896: my @secs = &localenroll::get_sections($coursecode,$cdom);
4897: my $seclist = &escape(join(':',@secs));
4898:
1.387 albertel 4899: &Reply($client, \$seclist, $userinput);
1.248 foxr 4900:
4901:
4902: return 1;
4903: }
4904: ®ister_handler("autogetsections", \&get_sections_handler, 0, 1, 0);
4905:
4906: # Validate the owner of a new course section.
4907: #
4908: # Formal Parameters:
4909: # $cmd - Command that got us dispatched.
4910: # $tail - the remainder of the command. For us this consists of a
4911: # colon separated string containing:
4912: # $inst - Course Id from the institutions point of view.
4913: # $owner - Proposed owner of the course.
4914: # $cdom - Domain of the course (from the institutions
4915: # point of view?)..
4916: # $client - Socket open on the client.
4917: #
4918: # Returns:
4919: # 1 - Processing should continue.
4920: #
4921: sub validate_course_owner_handler {
4922: my ($cmd, $tail, $client) = @_;
4923: my $userinput = "$cmd:$tail";
4924: my ($inst_course_id, $owner, $cdom) = split(/:/, $tail);
4925:
1.336 raeburn 4926: $owner = &unescape($owner);
1.248 foxr 4927: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom);
1.387 albertel 4928: &Reply($client, \$outcome, $userinput);
1.248 foxr 4929:
4930:
4931:
4932: return 1;
4933: }
4934: ®ister_handler("autonewcourse", \&validate_course_owner_handler, 0, 1, 0);
1.263 albertel 4935:
1.248 foxr 4936: #
4937: # Validate a course section in the official schedule of classes
4938: # from the institutions point of view (part of autoenrollment).
4939: #
4940: # Formal Parameters:
4941: # $cmd - The command request that got us dispatched.
4942: # $tail - The tail of the command. In this case,
4943: # this is a colon separated set of words that will be split
4944: # into:
4945: # $inst_course_id - The course/section id from the
4946: # institutions point of view.
4947: # $cdom - The domain from the institutions
4948: # point of view.
4949: # $client - Socket open on the client.
4950: # Returns:
4951: # 1 - Indicating processing should continue.
4952: #
4953: sub validate_course_section_handler {
4954: my ($cmd, $tail, $client) = @_;
4955: my $userinput = "$cmd:$tail";
4956: my ($inst_course_id, $cdom) = split(/:/, $tail);
4957:
4958: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
1.387 albertel 4959: &Reply($client, \$outcome, $userinput);
1.248 foxr 4960:
4961:
4962: return 1;
4963: }
4964: ®ister_handler("autovalidatecourse", \&validate_course_section_handler, 0, 1, 0);
4965:
4966: #
1.340 raeburn 4967: # Validate course owner's access to enrollment data for specific class section.
4968: #
4969: #
4970: # Formal Parameters:
4971: # $cmd - The command request that got us dispatched.
4972: # $tail - The tail of the command. In this case this is a colon separated
4973: # set of words that will be split into:
4974: # $inst_class - Institutional code for the specific class section
4975: # $courseowner - The escaped username:domain of the course owner
4976: # $cdom - The domain of the course from the institution's
4977: # point of view.
4978: # $client - The socket open on the client.
4979: # Returns:
4980: # 1 - continue processing.
4981: #
4982:
4983: sub validate_class_access_handler {
4984: my ($cmd, $tail, $client) = @_;
4985: my $userinput = "$cmd:$tail";
1.383 raeburn 4986: my ($inst_class,$ownerlist,$cdom) = split(/:/, $tail);
1.392 raeburn 4987: my $owners = &unescape($ownerlist);
1.341 albertel 4988: my $outcome;
4989: eval {
4990: local($SIG{__DIE__})='DEFAULT';
1.392 raeburn 4991: $outcome=&localenroll::check_section($inst_class,$owners,$cdom);
1.341 albertel 4992: };
1.387 albertel 4993: &Reply($client,\$outcome, $userinput);
1.340 raeburn 4994:
4995: return 1;
4996: }
4997: ®ister_handler("autovalidateclass_sec", \&validate_class_access_handler, 0, 1, 0);
4998:
4999: #
5000: # Create a password for a new LON-CAPA user added by auto-enrollment.
5001: # Only used for case where authentication method for new user is localauth
1.248 foxr 5002: #
5003: # Formal Parameters:
5004: # $cmd - The command request that got us dispatched.
5005: # $tail - The tail of the command. In this case this is a colon separated
5006: # set of words that will be split into:
1.340 raeburn 5007: # $authparam - An authentication parameter (localauth parameter).
1.248 foxr 5008: # $cdom - The domain of the course from the institution's
5009: # point of view.
5010: # $client - The socket open on the client.
5011: # Returns:
5012: # 1 - continue processing.
5013: #
5014: sub create_auto_enroll_password_handler {
5015: my ($cmd, $tail, $client) = @_;
5016: my $userinput = "$cmd:$tail";
5017:
5018: my ($authparam, $cdom) = split(/:/, $userinput);
5019:
5020: my ($create_passwd,$authchk);
5021: ($authparam,
5022: $create_passwd,
5023: $authchk) = &localenroll::create_password($authparam,$cdom);
5024:
5025: &Reply($client, &escape($authparam.':'.$create_passwd.':'.$authchk)."\n",
5026: $userinput);
5027:
5028:
5029: return 1;
5030: }
5031: ®ister_handler("autocreatepassword", \&create_auto_enroll_password_handler,
5032: 0, 1, 0);
5033:
5034: # Retrieve and remove temporary files created by/during autoenrollment.
5035: #
5036: # Formal Parameters:
5037: # $cmd - The command that got us dispatched.
5038: # $tail - The tail of the command. In our case this is a colon
5039: # separated list that will be split into:
5040: # $filename - The name of the file to remove.
5041: # The filename is given as a path relative to
5042: # the LonCAPA temp file directory.
5043: # $client - Socket open on the client.
5044: #
5045: # Returns:
5046: # 1 - Continue processing.
5047: sub retrieve_auto_file_handler {
5048: my ($cmd, $tail, $client) = @_;
5049: my $userinput = "cmd:$tail";
5050:
5051: my ($filename) = split(/:/, $tail);
5052:
5053: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
5054: if ( (-e $source) && ($filename ne '') ) {
5055: my $reply = '';
5056: if (open(my $fh,$source)) {
5057: while (<$fh>) {
5058: chomp($_);
5059: $_ =~ s/^\s+//g;
5060: $_ =~ s/\s+$//g;
5061: $reply .= $_;
5062: }
5063: close($fh);
5064: &Reply($client, &escape($reply)."\n", $userinput);
5065:
5066: # Does this have to be uncommented??!? (RF).
5067: #
5068: # unlink($source);
5069: } else {
5070: &Failure($client, "error\n", $userinput);
5071: }
5072: } else {
5073: &Failure($client, "error\n", $userinput);
5074: }
5075:
5076:
5077: return 1;
5078: }
5079: ®ister_handler("autoretrieve", \&retrieve_auto_file_handler, 0,1,0);
5080:
1.423 raeburn 5081: sub crsreq_checks_handler {
5082: my ($cmd, $tail, $client) = @_;
5083: my $userinput = "$cmd:$tail";
5084: my $dom = $tail;
5085: my $result;
1.424 raeburn 5086: my @reqtypes = ('official','unofficial','community');
1.423 raeburn 5087: eval {
5088: local($SIG{__DIE__})='DEFAULT';
5089: my %validations;
1.424 raeburn 5090: my $response = &localenroll::crsreq_checks($dom,\@reqtypes,
5091: \%validations);
1.423 raeburn 5092: if ($response eq 'ok') {
5093: foreach my $key (keys(%validations)) {
5094: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($validations{$key}).'&';
5095: }
5096: $result =~ s/\&$//;
5097: } else {
5098: $result = 'error';
5099: }
5100: };
5101: if (!$@) {
5102: &Reply($client, \$result, $userinput);
5103: } else {
5104: &Failure($client,"unknown_cmd\n",$userinput);
5105: }
5106: return 1;
5107: }
5108: ®ister_handler("autocrsreqchecks", \&crsreq_checks_handler, 0, 1, 0);
5109:
5110: sub validate_crsreq_handler {
5111: my ($cmd, $tail, $client) = @_;
5112: my $userinput = "$cmd:$tail";
5113: my ($dom,$owner,$crstype,$inststatuslist,$instcode,$instseclist) = split(/:/, $tail);
5114: $instcode = &unescape($instcode);
5115: $owner = &unescape($owner);
5116: $crstype = &unescape($crstype);
5117: $inststatuslist = &unescape($inststatuslist);
5118: $instcode = &unescape($instcode);
5119: $instseclist = &unescape($instseclist);
5120: my $outcome;
5121: eval {
5122: local($SIG{__DIE__})='DEFAULT';
5123: $outcome = &localenroll::validate_crsreq($dom,$owner,$crstype,
5124: $inststatuslist,$instcode,
5125: $instseclist);
5126: };
5127: if (!$@) {
5128: &Reply($client, \$outcome, $userinput);
5129: } else {
5130: &Failure($client,"unknown_cmd\n",$userinput);
5131: }
5132: return 1;
5133: }
5134: ®ister_handler("autocrsreqvalidation", \&validate_crsreq_handler, 0, 1, 0);
5135:
1.248 foxr 5136: #
5137: # Read and retrieve institutional code format (for support form).
5138: # Formal Parameters:
5139: # $cmd - Command that dispatched us.
5140: # $tail - Tail of the command. In this case it conatins
5141: # the course domain and the coursename.
5142: # $client - Socket open on the client.
5143: # Returns:
5144: # 1 - Continue processing.
5145: #
5146: sub get_institutional_code_format_handler {
5147: my ($cmd, $tail, $client) = @_;
5148: my $userinput = "$cmd:$tail";
5149:
5150: my $reply;
5151: my($cdom,$course) = split(/:/,$tail);
5152: my @pairs = split/\&/,$course;
5153: my %instcodes = ();
5154: my %codes = ();
5155: my @codetitles = ();
5156: my %cat_titles = ();
5157: my %cat_order = ();
5158: foreach (@pairs) {
5159: my ($key,$value) = split/=/,$_;
5160: $instcodes{&unescape($key)} = &unescape($value);
5161: }
5162: my $formatreply = &localenroll::instcode_format($cdom,
5163: \%instcodes,
5164: \%codes,
5165: \@codetitles,
5166: \%cat_titles,
5167: \%cat_order);
5168: if ($formatreply eq 'ok') {
1.365 albertel 5169: my $codes_str = &Apache::lonnet::hash2str(%codes);
5170: my $codetitles_str = &Apache::lonnet::array2str(@codetitles);
5171: my $cat_titles_str = &Apache::lonnet::hash2str(%cat_titles);
5172: my $cat_order_str = &Apache::lonnet::hash2str(%cat_order);
1.248 foxr 5173: &Reply($client,
5174: $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'
5175: .$cat_order_str."\n",
5176: $userinput);
5177: } else {
5178: # this else branch added by RF since if not ok, lonc will
5179: # hang waiting on reply until timeout.
5180: #
5181: &Reply($client, "format_error\n", $userinput);
5182: }
5183:
5184: return 1;
5185: }
1.265 albertel 5186: ®ister_handler("autoinstcodeformat",
5187: \&get_institutional_code_format_handler,0,1,0);
1.246 foxr 5188:
1.345 raeburn 5189: sub get_institutional_defaults_handler {
5190: my ($cmd, $tail, $client) = @_;
5191: my $userinput = "$cmd:$tail";
5192:
5193: my $dom = $tail;
5194: my %defaults_hash;
5195: my @code_order;
5196: my $outcome;
5197: eval {
5198: local($SIG{__DIE__})='DEFAULT';
5199: $outcome = &localenroll::instcode_defaults($dom,\%defaults_hash,
5200: \@code_order);
5201: };
5202: if (!$@) {
5203: if ($outcome eq 'ok') {
5204: my $result='';
5205: while (my ($key,$value) = each(%defaults_hash)) {
5206: $result.=&escape($key).'='.&escape($value).'&';
5207: }
5208: $result .= 'code_order='.&escape(join('&',@code_order));
1.387 albertel 5209: &Reply($client,\$result,$userinput);
1.345 raeburn 5210: } else {
5211: &Reply($client,"error\n", $userinput);
5212: }
5213: } else {
5214: &Failure($client,"unknown_cmd\n",$userinput);
5215: }
5216: }
5217: ®ister_handler("autoinstcodedefaults",
5218: \&get_institutional_defaults_handler,0,1,0);
5219:
1.416 raeburn 5220: sub get_possible_instcodes_handler {
5221: my ($cmd, $tail, $client) = @_;
5222: my $userinput = "$cmd:$tail";
5223:
5224: my $reply;
5225: my $cdom = $tail;
1.417 raeburn 5226: my (@codetitles,%cat_titles,%cat_order,@code_order);
1.416 raeburn 5227: my $formatreply = &localenroll::possible_instcodes($cdom,
5228: \@codetitles,
5229: \%cat_titles,
1.417 raeburn 5230: \%cat_order,
5231: \@code_order);
1.416 raeburn 5232: if ($formatreply eq 'ok') {
5233: my $result = join('&',map {&escape($_);} (@codetitles)).':';
1.417 raeburn 5234: $result .= join('&',map {&escape($_);} (@code_order)).':';
1.416 raeburn 5235: foreach my $key (keys(%cat_titles)) {
5236: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($cat_titles{$key}).'&';
5237: }
5238: $result =~ s/\&$//;
5239: $result .= ':';
5240: foreach my $key (keys(%cat_order)) {
5241: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($cat_order{$key}).'&';
5242: }
5243: $result =~ s/\&$//;
5244: &Reply($client,\$result,$userinput);
5245: } else {
5246: &Reply($client, "format_error\n", $userinput);
5247: }
5248: return 1;
5249: }
5250: ®ister_handler("autopossibleinstcodes",
5251: \&get_possible_instcodes_handler,0,1,0);
5252:
1.381 raeburn 5253: sub get_institutional_user_rules {
5254: my ($cmd, $tail, $client) = @_;
5255: my $userinput = "$cmd:$tail";
5256: my $dom = &unescape($tail);
5257: my (%rules_hash,@rules_order);
5258: my $outcome;
5259: eval {
5260: local($SIG{__DIE__})='DEFAULT';
5261: $outcome = &localenroll::username_rules($dom,\%rules_hash,\@rules_order);
5262: };
5263: if (!$@) {
5264: if ($outcome eq 'ok') {
5265: my $result;
5266: foreach my $key (keys(%rules_hash)) {
5267: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
5268: }
5269: $result =~ s/\&$//;
5270: $result .= ':';
5271: if (@rules_order > 0) {
5272: foreach my $item (@rules_order) {
5273: $result .= &escape($item).'&';
5274: }
5275: }
5276: $result =~ s/\&$//;
1.387 albertel 5277: &Reply($client,\$result,$userinput);
1.381 raeburn 5278: } else {
5279: &Reply($client,"error\n", $userinput);
5280: }
5281: } else {
5282: &Failure($client,"unknown_cmd\n",$userinput);
5283: }
5284: }
5285: ®ister_handler("instuserrules",\&get_institutional_user_rules,0,1,0);
5286:
1.389 raeburn 5287: sub get_institutional_id_rules {
5288: my ($cmd, $tail, $client) = @_;
5289: my $userinput = "$cmd:$tail";
5290: my $dom = &unescape($tail);
5291: my (%rules_hash,@rules_order);
5292: my $outcome;
5293: eval {
5294: local($SIG{__DIE__})='DEFAULT';
5295: $outcome = &localenroll::id_rules($dom,\%rules_hash,\@rules_order);
5296: };
5297: if (!$@) {
5298: if ($outcome eq 'ok') {
5299: my $result;
5300: foreach my $key (keys(%rules_hash)) {
5301: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
5302: }
5303: $result =~ s/\&$//;
5304: $result .= ':';
5305: if (@rules_order > 0) {
5306: foreach my $item (@rules_order) {
5307: $result .= &escape($item).'&';
5308: }
5309: }
5310: $result =~ s/\&$//;
5311: &Reply($client,\$result,$userinput);
5312: } else {
5313: &Reply($client,"error\n", $userinput);
5314: }
5315: } else {
5316: &Failure($client,"unknown_cmd\n",$userinput);
5317: }
5318: }
5319: ®ister_handler("instidrules",\&get_institutional_id_rules,0,1,0);
5320:
1.397 raeburn 5321: sub get_institutional_selfcreate_rules {
1.396 raeburn 5322: my ($cmd, $tail, $client) = @_;
5323: my $userinput = "$cmd:$tail";
5324: my $dom = &unescape($tail);
5325: my (%rules_hash,@rules_order);
5326: my $outcome;
5327: eval {
5328: local($SIG{__DIE__})='DEFAULT';
1.397 raeburn 5329: $outcome = &localenroll::selfcreate_rules($dom,\%rules_hash,\@rules_order);
1.396 raeburn 5330: };
5331: if (!$@) {
5332: if ($outcome eq 'ok') {
5333: my $result;
5334: foreach my $key (keys(%rules_hash)) {
5335: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
5336: }
5337: $result =~ s/\&$//;
5338: $result .= ':';
5339: if (@rules_order > 0) {
5340: foreach my $item (@rules_order) {
5341: $result .= &escape($item).'&';
5342: }
5343: }
5344: $result =~ s/\&$//;
5345: &Reply($client,\$result,$userinput);
5346: } else {
5347: &Reply($client,"error\n", $userinput);
5348: }
5349: } else {
5350: &Failure($client,"unknown_cmd\n",$userinput);
5351: }
5352: }
1.397 raeburn 5353: ®ister_handler("instemailrules",\&get_institutional_selfcreate_rules,0,1,0);
1.396 raeburn 5354:
1.381 raeburn 5355:
5356: sub institutional_username_check {
5357: my ($cmd, $tail, $client) = @_;
5358: my $userinput = "$cmd:$tail";
5359: my %rulecheck;
5360: my $outcome;
5361: my ($udom,$uname,@rules) = split(/:/,$tail);
5362: $udom = &unescape($udom);
5363: $uname = &unescape($uname);
5364: @rules = map {&unescape($_);} (@rules);
5365: eval {
5366: local($SIG{__DIE__})='DEFAULT';
5367: $outcome = &localenroll::username_check($udom,$uname,\@rules,\%rulecheck);
5368: };
5369: if (!$@) {
5370: if ($outcome eq 'ok') {
5371: my $result='';
5372: foreach my $key (keys(%rulecheck)) {
5373: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
5374: }
1.387 albertel 5375: &Reply($client,\$result,$userinput);
1.381 raeburn 5376: } else {
5377: &Reply($client,"error\n", $userinput);
5378: }
5379: } else {
5380: &Failure($client,"unknown_cmd\n",$userinput);
5381: }
5382: }
5383: ®ister_handler("instrulecheck",\&institutional_username_check,0,1,0);
5384:
1.389 raeburn 5385: sub institutional_id_check {
5386: my ($cmd, $tail, $client) = @_;
5387: my $userinput = "$cmd:$tail";
5388: my %rulecheck;
5389: my $outcome;
5390: my ($udom,$id,@rules) = split(/:/,$tail);
5391: $udom = &unescape($udom);
5392: $id = &unescape($id);
5393: @rules = map {&unescape($_);} (@rules);
5394: eval {
5395: local($SIG{__DIE__})='DEFAULT';
5396: $outcome = &localenroll::id_check($udom,$id,\@rules,\%rulecheck);
5397: };
5398: if (!$@) {
5399: if ($outcome eq 'ok') {
5400: my $result='';
5401: foreach my $key (keys(%rulecheck)) {
5402: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
5403: }
5404: &Reply($client,\$result,$userinput);
5405: } else {
5406: &Reply($client,"error\n", $userinput);
5407: }
5408: } else {
5409: &Failure($client,"unknown_cmd\n",$userinput);
5410: }
5411: }
5412: ®ister_handler("instidrulecheck",\&institutional_id_check,0,1,0);
1.345 raeburn 5413:
1.397 raeburn 5414: sub institutional_selfcreate_check {
1.396 raeburn 5415: my ($cmd, $tail, $client) = @_;
5416: my $userinput = "$cmd:$tail";
5417: my %rulecheck;
5418: my $outcome;
5419: my ($udom,$email,@rules) = split(/:/,$tail);
5420: $udom = &unescape($udom);
5421: $email = &unescape($email);
5422: @rules = map {&unescape($_);} (@rules);
5423: eval {
5424: local($SIG{__DIE__})='DEFAULT';
1.397 raeburn 5425: $outcome = &localenroll::selfcreate_check($udom,$email,\@rules,\%rulecheck);
1.396 raeburn 5426: };
5427: if (!$@) {
5428: if ($outcome eq 'ok') {
5429: my $result='';
5430: foreach my $key (keys(%rulecheck)) {
5431: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
5432: }
5433: &Reply($client,\$result,$userinput);
5434: } else {
5435: &Reply($client,"error\n", $userinput);
5436: }
5437: } else {
5438: &Failure($client,"unknown_cmd\n",$userinput);
5439: }
5440: }
1.397 raeburn 5441: ®ister_handler("instselfcreatecheck",\&institutional_selfcreate_check,0,1,0);
1.396 raeburn 5442:
1.317 raeburn 5443: # Get domain specific conditions for import of student photographs to a course
5444: #
5445: # Retrieves information from photo_permission subroutine in localenroll.
5446: # Returns outcome (ok) if no processing errors, and whether course owner is
5447: # required to accept conditions of use (yes/no).
5448: #
5449: #
5450: sub photo_permission_handler {
5451: my ($cmd, $tail, $client) = @_;
5452: my $userinput = "$cmd:$tail";
5453: my $cdom = $tail;
5454: my ($perm_reqd,$conditions);
1.320 albertel 5455: my $outcome;
5456: eval {
5457: local($SIG{__DIE__})='DEFAULT';
5458: $outcome = &localenroll::photo_permission($cdom,\$perm_reqd,
5459: \$conditions);
5460: };
5461: if (!$@) {
5462: &Reply($client, &escape($outcome.':'.$perm_reqd.':'. $conditions)."\n",
5463: $userinput);
5464: } else {
5465: &Failure($client,"unknown_cmd\n",$userinput);
5466: }
5467: return 1;
1.317 raeburn 5468: }
5469: ®ister_handler("autophotopermission",\&photo_permission_handler,0,1,0);
5470:
5471: #
5472: # Checks if student photo is available for a user in the domain, in the user's
5473: # directory (in /userfiles/internal/studentphoto.jpg).
5474: # Uses localstudentphoto:fetch() to ensure there is an up to date copy of
5475: # the student's photo.
5476:
5477: sub photo_check_handler {
5478: my ($cmd, $tail, $client) = @_;
5479: my $userinput = "$cmd:$tail";
5480: my ($udom,$uname,$pid) = split(/:/,$tail);
5481: $udom = &unescape($udom);
5482: $uname = &unescape($uname);
5483: $pid = &unescape($pid);
5484: my $path=&propath($udom,$uname).'/userfiles/internal/';
5485: if (!-e $path) {
5486: &mkpath($path);
5487: }
5488: my $response;
5489: my $result = &localstudentphoto::fetch($udom,$uname,$pid,\$response);
5490: $result .= ':'.$response;
5491: &Reply($client, &escape($result)."\n",$userinput);
1.320 albertel 5492: return 1;
1.317 raeburn 5493: }
5494: ®ister_handler("autophotocheck",\&photo_check_handler,0,1,0);
5495:
5496: #
5497: # Retrieve information from localenroll about whether to provide a button
5498: # for users who have enbled import of student photos to initiate an
5499: # update of photo files for registered students. Also include
5500: # comment to display alongside button.
5501:
5502: sub photo_choice_handler {
5503: my ($cmd, $tail, $client) = @_;
5504: my $userinput = "$cmd:$tail";
5505: my $cdom = &unescape($tail);
1.320 albertel 5506: my ($update,$comment);
5507: eval {
5508: local($SIG{__DIE__})='DEFAULT';
5509: ($update,$comment) = &localenroll::manager_photo_update($cdom);
5510: };
5511: if (!$@) {
5512: &Reply($client,&escape($update).':'.&escape($comment)."\n",$userinput);
5513: } else {
5514: &Failure($client,"unknown_cmd\n",$userinput);
5515: }
5516: return 1;
1.317 raeburn 5517: }
5518: ®ister_handler("autophotochoice",\&photo_choice_handler,0,1,0);
5519:
1.265 albertel 5520: #
5521: # Gets a student's photo to exist (in the correct image type) in the user's
5522: # directory.
5523: # Formal Parameters:
5524: # $cmd - The command request that got us dispatched.
5525: # $tail - A colon separated set of words that will be split into:
5526: # $domain - student's domain
5527: # $uname - student username
5528: # $type - image type desired
5529: # $client - The socket open on the client.
5530: # Returns:
5531: # 1 - continue processing.
1.317 raeburn 5532:
1.265 albertel 5533: sub student_photo_handler {
5534: my ($cmd, $tail, $client) = @_;
1.317 raeburn 5535: my ($domain,$uname,$ext,$type) = split(/:/, $tail);
1.265 albertel 5536:
1.317 raeburn 5537: my $path=&propath($domain,$uname). '/userfiles/internal/';
5538: my $filename = 'studentphoto.'.$ext;
5539: if ($type eq 'thumbnail') {
5540: $filename = 'studentphoto_tn.'.$ext;
5541: }
5542: if (-e $path.$filename) {
1.265 albertel 5543: &Reply($client,"ok\n","$cmd:$tail");
5544: return 1;
5545: }
5546: &mkpath($path);
1.317 raeburn 5547: my $file;
5548: if ($type eq 'thumbnail') {
1.320 albertel 5549: eval {
5550: local($SIG{__DIE__})='DEFAULT';
5551: $file=&localstudentphoto::fetch_thumbnail($domain,$uname);
5552: };
1.317 raeburn 5553: } else {
5554: $file=&localstudentphoto::fetch($domain,$uname);
5555: }
1.265 albertel 5556: if (!$file) {
5557: &Failure($client,"unavailable\n","$cmd:$tail");
5558: return 1;
5559: }
1.317 raeburn 5560: if (!-e $path.$filename) { &convert_photo($file,$path.$filename); }
5561: if (-e $path.$filename) {
1.265 albertel 5562: &Reply($client,"ok\n","$cmd:$tail");
5563: return 1;
5564: }
5565: &Failure($client,"unable_to_convert\n","$cmd:$tail");
5566: return 1;
5567: }
5568: ®ister_handler("studentphoto", \&student_photo_handler, 0, 1, 0);
1.246 foxr 5569:
1.361 raeburn 5570: sub inst_usertypes_handler {
5571: my ($cmd, $domain, $client) = @_;
5572: my $res;
5573: my $userinput = $cmd.":".$domain; # For logging purposes.
1.370 albertel 5574: my (%typeshash,@order,$result);
5575: eval {
5576: local($SIG{__DIE__})='DEFAULT';
5577: $result=&localenroll::inst_usertypes($domain,\%typeshash,\@order);
5578: };
5579: if ($result eq 'ok') {
1.361 raeburn 5580: if (keys(%typeshash) > 0) {
5581: foreach my $key (keys(%typeshash)) {
5582: $res.=&escape($key).'='.&escape($typeshash{$key}).'&';
5583: }
5584: }
5585: $res=~s/\&$//;
5586: $res .= ':';
5587: if (@order > 0) {
5588: foreach my $item (@order) {
5589: $res .= &escape($item).'&';
5590: }
5591: }
5592: $res=~s/\&$//;
5593: }
1.387 albertel 5594: &Reply($client, \$res, $userinput);
1.361 raeburn 5595: return 1;
5596: }
5597: ®ister_handler("inst_usertypes", \&inst_usertypes_handler, 0, 1, 0);
5598:
1.264 albertel 5599: # mkpath makes all directories for a file, expects an absolute path with a
5600: # file or a trailing / if just a dir is passed
5601: # returns 1 on success 0 on failure
5602: sub mkpath {
5603: my ($file)=@_;
5604: my @parts=split(/\//,$file,-1);
5605: my $now=$parts[0].'/'.$parts[1].'/'.$parts[2];
5606: for (my $i=3;$i<= ($#parts-1);$i++) {
1.265 albertel 5607: $now.='/'.$parts[$i];
1.264 albertel 5608: if (!-e $now) {
5609: if (!mkdir($now,0770)) { return 0; }
5610: }
5611: }
5612: return 1;
5613: }
5614:
1.207 foxr 5615: #---------------------------------------------------------------
5616: #
5617: # Getting, decoding and dispatching requests:
5618: #
5619: #
5620: # Get a Request:
5621: # Gets a Request message from the client. The transaction
5622: # is defined as a 'line' of text. We remove the new line
5623: # from the text line.
1.226 foxr 5624: #
1.211 albertel 5625: sub get_request {
1.207 foxr 5626: my $input = <$client>;
5627: chomp($input);
1.226 foxr 5628:
1.234 foxr 5629: &Debug("get_request: Request = $input\n");
1.207 foxr 5630:
5631: &status('Processing '.$clientname.':'.$input);
5632:
5633: return $input;
5634: }
1.212 foxr 5635: #---------------------------------------------------------------
5636: #
5637: # Process a request. This sub should shrink as each action
5638: # gets farmed out into a separat sub that is registered
5639: # with the dispatch hash.
5640: #
5641: # Parameters:
5642: # user_input - The request received from the client (lonc).
5643: # Returns:
5644: # true to keep processing, false if caller should exit.
5645: #
5646: sub process_request {
5647: my ($userinput) = @_; # Easier for now to break style than to
5648: # fix all the userinput -> user_input.
5649: my $wasenc = 0; # True if request was encrypted.
5650: # ------------------------------------------------------------ See if encrypted
1.322 albertel 5651: # for command
5652: # sethost:<server>
5653: # <command>:<args>
5654: # we just send it to the processor
5655: # for
5656: # sethost:<server>:<command>:<args>
5657: # we do the implict set host and then do the command
5658: if ($userinput =~ /^sethost:/) {
5659: (my $cmd,my $newid,$userinput) = split(':',$userinput,3);
5660: if (defined($userinput)) {
5661: &sethost("$cmd:$newid");
5662: } else {
5663: $userinput = "$cmd:$newid";
5664: }
5665: }
5666:
1.212 foxr 5667: if ($userinput =~ /^enc/) {
5668: $userinput = decipher($userinput);
5669: $wasenc=1;
5670: if(!$userinput) { # Cipher not defined.
1.251 foxr 5671: &Failure($client, "error: Encrypted data without negotated key\n");
1.212 foxr 5672: return 0;
5673: }
5674: }
5675: Debug("process_request: $userinput\n");
5676:
1.213 foxr 5677: #
5678: # The 'correct way' to add a command to lond is now to
5679: # write a sub to execute it and Add it to the command dispatch
5680: # hash via a call to register_handler.. The comments to that
5681: # sub should give you enough to go on to show how to do this
5682: # along with the examples that are building up as this code
5683: # is getting refactored. Until all branches of the
5684: # if/elseif monster below have been factored out into
5685: # separate procesor subs, if the dispatch hash is missing
5686: # the command keyword, we will fall through to the remainder
5687: # of the if/else chain below in order to keep this thing in
5688: # working order throughout the transmogrification.
5689:
5690: my ($command, $tail) = split(/:/, $userinput, 2);
5691: chomp($command);
5692: chomp($tail);
5693: $tail =~ s/(\r)//; # This helps people debugging with e.g. telnet.
1.214 foxr 5694: $command =~ s/(\r)//; # And this too for parameterless commands.
5695: if(!$tail) {
5696: $tail =""; # defined but blank.
5697: }
1.213 foxr 5698:
5699: &Debug("Command received: $command, encoded = $wasenc");
5700:
5701: if(defined $Dispatcher{$command}) {
5702:
5703: my $dispatch_info = $Dispatcher{$command};
5704: my $handler = $$dispatch_info[0];
5705: my $need_encode = $$dispatch_info[1];
5706: my $client_types = $$dispatch_info[2];
5707: Debug("Matched dispatch hash: mustencode: $need_encode "
5708: ."ClientType $client_types");
5709:
5710: # Validate the request:
5711:
5712: my $ok = 1;
5713: my $requesterprivs = 0;
5714: if(&isClient()) {
5715: $requesterprivs |= $CLIENT_OK;
5716: }
5717: if(&isManager()) {
5718: $requesterprivs |= $MANAGER_OK;
5719: }
5720: if($need_encode && (!$wasenc)) {
5721: Debug("Must encode but wasn't: $need_encode $wasenc");
5722: $ok = 0;
5723: }
5724: if(($client_types & $requesterprivs) == 0) {
5725: Debug("Client not privileged to do this operation");
5726: $ok = 0;
5727: }
5728:
5729: if($ok) {
5730: Debug("Dispatching to handler $command $tail");
5731: my $keep_going = &$handler($command, $tail, $client);
5732: return $keep_going;
5733: } else {
5734: Debug("Refusing to dispatch because client did not match requirements");
5735: Failure($client, "refused\n", $userinput);
5736: return 1;
5737: }
5738:
5739: }
5740:
1.262 foxr 5741: print $client "unknown_cmd\n";
1.212 foxr 5742: # -------------------------------------------------------------------- complete
5743: Debug("process_request - returning 1");
5744: return 1;
5745: }
1.207 foxr 5746: #
5747: # Decipher encoded traffic
5748: # Parameters:
5749: # input - Encoded data.
5750: # Returns:
5751: # Decoded data or undef if encryption key was not yet negotiated.
5752: # Implicit input:
5753: # cipher - This global holds the negotiated encryption key.
5754: #
1.211 albertel 5755: sub decipher {
1.207 foxr 5756: my ($input) = @_;
5757: my $output = '';
1.212 foxr 5758:
5759:
1.207 foxr 5760: if($cipher) {
5761: my($enc, $enclength, $encinput) = split(/:/, $input);
5762: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
5763: $output .=
5764: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
5765: }
5766: return substr($output, 0, $enclength);
5767: } else {
5768: return undef;
5769: }
5770: }
5771:
5772: #
5773: # Register a command processor. This function is invoked to register a sub
5774: # to process a request. Once registered, the ProcessRequest sub can automatically
5775: # dispatch requests to an appropriate sub, and do the top level validity checking
5776: # as well:
5777: # - Is the keyword recognized.
5778: # - Is the proper client type attempting the request.
5779: # - Is the request encrypted if it has to be.
5780: # Parameters:
5781: # $request_name - Name of the request being registered.
5782: # This is the command request that will match
5783: # against the hash keywords to lookup the information
5784: # associated with the dispatch information.
5785: # $procedure - Reference to a sub to call to process the request.
5786: # All subs get called as follows:
5787: # Procedure($cmd, $tail, $replyfd, $key)
5788: # $cmd - the actual keyword that invoked us.
5789: # $tail - the tail of the request that invoked us.
5790: # $replyfd- File descriptor connected to the client
5791: # $must_encode - True if the request must be encoded to be good.
5792: # $client_ok - True if it's ok for a client to request this.
5793: # $manager_ok - True if it's ok for a manager to request this.
5794: # Side effects:
5795: # - On success, the Dispatcher hash has an entry added for the key $RequestName
5796: # - On failure, the program will die as it's a bad internal bug to try to
5797: # register a duplicate command handler.
5798: #
1.211 albertel 5799: sub register_handler {
1.212 foxr 5800: my ($request_name,$procedure,$must_encode, $client_ok,$manager_ok) = @_;
1.207 foxr 5801:
5802: # Don't allow duplication#
5803:
5804: if (defined $Dispatcher{$request_name}) {
5805: die "Attempting to define a duplicate request handler for $request_name\n";
5806: }
5807: # Build the client type mask:
5808:
5809: my $client_type_mask = 0;
5810: if($client_ok) {
5811: $client_type_mask |= $CLIENT_OK;
5812: }
5813: if($manager_ok) {
5814: $client_type_mask |= $MANAGER_OK;
5815: }
5816:
5817: # Enter the hash:
5818:
5819: my @entry = ($procedure, $must_encode, $client_type_mask);
5820:
5821: $Dispatcher{$request_name} = \@entry;
5822:
5823: }
5824:
5825:
5826: #------------------------------------------------------------------
5827:
5828:
5829:
5830:
1.141 foxr 5831: #
1.96 foxr 5832: # Convert an error return code from lcpasswd to a string value.
5833: #
5834: sub lcpasswdstrerror {
5835: my $ErrorCode = shift;
1.97 foxr 5836: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
1.96 foxr 5837: return "lcpasswd Unrecognized error return value ".$ErrorCode;
5838: } else {
1.98 foxr 5839: return $passwderrors[$ErrorCode];
1.96 foxr 5840: }
5841: }
5842:
1.97 foxr 5843: #
5844: # Convert an error return code from lcuseradd to a string value:
5845: #
5846: sub lcuseraddstrerror {
5847: my $ErrorCode = shift;
5848: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
5849: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
5850: } else {
1.98 foxr 5851: return $adderrors[$ErrorCode];
1.97 foxr 5852: }
5853: }
5854:
1.23 harris41 5855: # grabs exception and records it to log before exiting
5856: sub catchexception {
1.27 albertel 5857: my ($error)=@_;
1.25 www 5858: $SIG{'QUIT'}='DEFAULT';
5859: $SIG{__DIE__}='DEFAULT';
1.165 albertel 5860: &status("Catching exception");
1.190 albertel 5861: &logthis("<font color='red'>CRITICAL: "
1.373 albertel 5862: ."ABNORMAL EXIT. Child $$ for server ".$perlvar{'lonHostID'}." died through "
1.27 albertel 5863: ."a crash with this error msg->[$error]</font>");
1.57 www 5864: &logthis('Famous last words: '.$status.' - '.$lastlog);
1.27 albertel 5865: if ($client) { print $client "error: $error\n"; }
1.59 www 5866: $server->close();
1.27 albertel 5867: die($error);
1.23 harris41 5868: }
1.63 www 5869: sub timeout {
1.165 albertel 5870: &status("Handling Timeout");
1.190 albertel 5871: &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
1.63 www 5872: &catchexception('Timeout');
5873: }
1.22 harris41 5874: # -------------------------------- Set signal handlers to record abnormal exits
5875:
1.226 foxr 5876:
1.22 harris41 5877: $SIG{'QUIT'}=\&catchexception;
5878: $SIG{__DIE__}=\&catchexception;
5879:
1.81 matthew 5880: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
1.95 harris41 5881: &status("Read loncapa.conf and loncapa_apache.conf");
5882: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
1.141 foxr 5883: %perlvar=%{$perlvarref};
1.80 harris41 5884: undef $perlvarref;
1.19 www 5885:
1.35 harris41 5886: # ----------------------------- Make sure this process is running from user=www
5887: my $wwwid=getpwnam('www');
5888: if ($wwwid!=$<) {
1.134 albertel 5889: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
5890: my $subj="LON: $currenthostid User ID mismatch";
1.37 harris41 5891: system("echo 'User ID mismatch. lond must be run as user www.' |\
1.35 harris41 5892: mailto $emailto -s '$subj' > /dev/null");
5893: exit 1;
5894: }
5895:
1.19 www 5896: # --------------------------------------------- Check if other instance running
5897:
5898: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
5899:
5900: if (-e $pidfile) {
5901: my $lfh=IO::File->new("$pidfile");
5902: my $pide=<$lfh>;
5903: chomp($pide);
1.29 harris41 5904: if (kill 0 => $pide) { die "already running"; }
1.19 www 5905: }
1.1 albertel 5906:
5907: # ------------------------------------------------------------- Read hosts file
5908:
5909:
5910:
5911: # establish SERVER socket, bind and listen.
5912: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
5913: Type => SOCK_STREAM,
5914: Proto => 'tcp',
5915: Reuse => 1,
5916: Listen => 10 )
1.29 harris41 5917: or die "making socket: $@\n";
1.1 albertel 5918:
5919: # --------------------------------------------------------- Do global variables
5920:
5921: # global variables
5922:
1.134 albertel 5923: my %children = (); # keys are current child process IDs
1.1 albertel 5924:
5925: sub REAPER { # takes care of dead children
5926: $SIG{CHLD} = \&REAPER;
1.165 albertel 5927: &status("Handling child death");
1.178 foxr 5928: my $pid;
5929: do {
5930: $pid = waitpid(-1,&WNOHANG());
5931: if (defined($children{$pid})) {
5932: &logthis("Child $pid died");
5933: delete($children{$pid});
1.183 albertel 5934: } elsif ($pid > 0) {
1.178 foxr 5935: &logthis("Unknown Child $pid died");
5936: }
5937: } while ( $pid > 0 );
5938: foreach my $child (keys(%children)) {
5939: $pid = waitpid($child,&WNOHANG());
5940: if ($pid > 0) {
5941: &logthis("Child $child - $pid looks like we missed it's death");
5942: delete($children{$pid});
5943: }
1.176 albertel 5944: }
1.165 albertel 5945: &status("Finished Handling child death");
1.1 albertel 5946: }
5947:
5948: sub HUNTSMAN { # signal handler for SIGINT
1.165 albertel 5949: &status("Killing children (INT)");
1.1 albertel 5950: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
5951: kill 'INT' => keys %children;
1.59 www 5952: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.1 albertel 5953: my $execdir=$perlvar{'lonDaemons'};
5954: unlink("$execdir/logs/lond.pid");
1.190 albertel 5955: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
1.165 albertel 5956: &status("Done killing children");
1.1 albertel 5957: exit; # clean up with dignity
5958: }
5959:
5960: sub HUPSMAN { # signal handler for SIGHUP
5961: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
1.165 albertel 5962: &status("Killing children for restart (HUP)");
1.1 albertel 5963: kill 'INT' => keys %children;
1.59 www 5964: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.190 albertel 5965: &logthis("<font color='red'>CRITICAL: Restarting</font>");
1.134 albertel 5966: my $execdir=$perlvar{'lonDaemons'};
1.30 harris41 5967: unlink("$execdir/logs/lond.pid");
1.165 albertel 5968: &status("Restarting self (HUP)");
1.1 albertel 5969: exec("$execdir/lond"); # here we go again
5970: }
5971:
1.144 foxr 5972: #
1.148 foxr 5973: # Reload the Apache daemon's state.
1.150 foxr 5974: # This is done by invoking /home/httpd/perl/apachereload
5975: # a setuid perl script that can be root for us to do this job.
1.148 foxr 5976: #
5977: sub ReloadApache {
1.150 foxr 5978: my $execdir = $perlvar{'lonDaemons'};
5979: my $script = $execdir."/apachereload";
5980: system($script);
1.148 foxr 5981: }
5982:
5983: #
1.144 foxr 5984: # Called in response to a USR2 signal.
5985: # - Reread hosts.tab
5986: # - All children connected to hosts that were removed from hosts.tab
5987: # are killed via SIGINT
5988: # - All children connected to previously existing hosts are sent SIGUSR1
5989: # - Our internal hosts hash is updated to reflect the new contents of
5990: # hosts.tab causing connections from hosts added to hosts.tab to
5991: # now be honored.
5992: #
5993: sub UpdateHosts {
1.165 albertel 5994: &status("Reload hosts.tab");
1.147 foxr 5995: logthis('<font color="blue"> Updating connections </font>');
1.148 foxr 5996: #
5997: # The %children hash has the set of IP's we currently have children
5998: # on. These need to be matched against records in the hosts.tab
5999: # Any ip's no longer in the table get killed off they correspond to
6000: # either dropped or changed hosts. Note that the re-read of the table
6001: # will take care of new and changed hosts as connections come into being.
6002:
1.371 albertel 6003: &Apache::lonnet::reset_hosts_info();
1.148 foxr 6004:
1.368 albertel 6005: foreach my $child (keys(%children)) {
1.148 foxr 6006: my $childip = $children{$child};
1.374 albertel 6007: if ($childip ne '127.0.0.1'
6008: && !defined(&Apache::lonnet::get_hosts_from_ip($childip))) {
1.149 foxr 6009: logthis('<font color="blue"> UpdateHosts killing child '
6010: ." $child for ip $childip </font>");
1.148 foxr 6011: kill('INT', $child);
1.149 foxr 6012: } else {
6013: logthis('<font color="green"> keeping child for ip '
6014: ." $childip (pid=$child) </font>");
1.148 foxr 6015: }
6016: }
6017: ReloadApache;
1.165 albertel 6018: &status("Finished reloading hosts.tab");
1.144 foxr 6019: }
6020:
1.148 foxr 6021:
1.57 www 6022: sub checkchildren {
1.165 albertel 6023: &status("Checking on the children (sending signals)");
1.57 www 6024: &initnewstatus();
6025: &logstatus();
6026: &logthis('Going to check on the children');
1.134 albertel 6027: my $docdir=$perlvar{'lonDocRoot'};
1.61 harris41 6028: foreach (sort keys %children) {
1.221 albertel 6029: #sleep 1;
1.57 www 6030: unless (kill 'USR1' => $_) {
6031: &logthis ('Child '.$_.' is dead');
6032: &logstatus($$.' is dead');
1.221 albertel 6033: delete($children{$_});
1.57 www 6034: }
1.61 harris41 6035: }
1.63 www 6036: sleep 5;
1.212 foxr 6037: $SIG{ALRM} = sub { Debug("timeout");
6038: die "timeout"; };
1.113 albertel 6039: $SIG{__DIE__} = 'DEFAULT';
1.165 albertel 6040: &status("Checking on the children (waiting for reports)");
1.63 www 6041: foreach (sort keys %children) {
6042: unless (-e "$docdir/lon-status/londchld/$_.txt") {
1.113 albertel 6043: eval {
6044: alarm(300);
1.63 www 6045: &logthis('Child '.$_.' did not respond');
1.67 albertel 6046: kill 9 => $_;
1.131 albertel 6047: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
6048: #$subj="LON: $currenthostid killed lond process $_";
6049: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
6050: #$execdir=$perlvar{'lonDaemons'};
6051: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
1.221 albertel 6052: delete($children{$_});
1.113 albertel 6053: alarm(0);
6054: }
1.63 www 6055: }
6056: }
1.113 albertel 6057: $SIG{ALRM} = 'DEFAULT';
1.155 albertel 6058: $SIG{__DIE__} = \&catchexception;
1.165 albertel 6059: &status("Finished checking children");
1.221 albertel 6060: &logthis('Finished Checking children');
1.57 www 6061: }
6062:
1.1 albertel 6063: # --------------------------------------------------------------------- Logging
6064:
6065: sub logthis {
6066: my $message=shift;
6067: my $execdir=$perlvar{'lonDaemons'};
6068: my $fh=IO::File->new(">>$execdir/logs/lond.log");
6069: my $now=time;
6070: my $local=localtime($now);
1.58 www 6071: $lastlog=$local.': '.$message;
1.1 albertel 6072: print $fh "$local ($$): $message\n";
6073: }
6074:
1.77 foxr 6075: # ------------------------- Conditional log if $DEBUG true.
6076: sub Debug {
6077: my $message = shift;
6078: if($DEBUG) {
6079: &logthis($message);
6080: }
6081: }
1.161 foxr 6082:
6083: #
6084: # Sub to do replies to client.. this gives a hook for some
6085: # debug tracing too:
6086: # Parameters:
6087: # fd - File open on client.
6088: # reply - Text to send to client.
6089: # request - Original request from client.
6090: #
6091: sub Reply {
1.192 foxr 6092: my ($fd, $reply, $request) = @_;
1.387 albertel 6093: if (ref($reply)) {
6094: print $fd $$reply;
6095: print $fd "\n";
6096: if ($DEBUG) { Debug("Request was $request Reply was $$reply"); }
6097: } else {
6098: print $fd $reply;
6099: if ($DEBUG) { Debug("Request was $request Reply was $reply"); }
6100: }
1.212 foxr 6101: $Transactions++;
6102: }
6103:
6104:
6105: #
6106: # Sub to report a failure.
6107: # This function:
6108: # - Increments the failure statistic counters.
6109: # - Invokes Reply to send the error message to the client.
6110: # Parameters:
6111: # fd - File descriptor open on the client
6112: # reply - Reply text to emit.
6113: # request - The original request message (used by Reply
6114: # to debug if that's enabled.
6115: # Implicit outputs:
6116: # $Failures- The number of failures is incremented.
6117: # Reply (invoked here) sends a message to the
6118: # client:
6119: #
6120: sub Failure {
6121: my $fd = shift;
6122: my $reply = shift;
6123: my $request = shift;
6124:
6125: $Failures++;
6126: Reply($fd, $reply, $request); # That's simple eh?
1.161 foxr 6127: }
1.57 www 6128: # ------------------------------------------------------------------ Log status
6129:
6130: sub logstatus {
1.178 foxr 6131: &status("Doing logging");
6132: my $docdir=$perlvar{'lonDocRoot'};
6133: {
6134: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
1.200 matthew 6135: print $fh $status."\n".$lastlog."\n".time."\n$keymode";
1.178 foxr 6136: $fh->close();
6137: }
1.221 albertel 6138: &status("Finished $$.txt");
6139: {
6140: open(LOG,">>$docdir/lon-status/londstatus.txt");
6141: flock(LOG,LOCK_EX);
6142: print LOG $$."\t".$clientname."\t".$currenthostid."\t"
6143: .$status."\t".$lastlog."\t $keymode\n";
1.275 albertel 6144: flock(LOG,LOCK_UN);
1.221 albertel 6145: close(LOG);
6146: }
1.178 foxr 6147: &status("Finished logging");
1.57 www 6148: }
6149:
6150: sub initnewstatus {
6151: my $docdir=$perlvar{'lonDocRoot'};
6152: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
6153: my $now=time;
6154: my $local=localtime($now);
6155: print $fh "LOND status $local - parent $$\n\n";
1.64 www 6156: opendir(DIR,"$docdir/lon-status/londchld");
1.134 albertel 6157: while (my $filename=readdir(DIR)) {
1.64 www 6158: unlink("$docdir/lon-status/londchld/$filename");
6159: }
6160: closedir(DIR);
1.57 www 6161: }
6162:
6163: # -------------------------------------------------------------- Status setting
6164:
6165: sub status {
6166: my $what=shift;
6167: my $now=time;
6168: my $local=localtime($now);
1.178 foxr 6169: $status=$local.': '.$what;
6170: $0='lond: '.$what.' '.$local;
1.57 www 6171: }
1.11 www 6172:
1.13 www 6173: # -------------------------------------------------------------- Talk to lonsql
6174:
1.234 foxr 6175: sub sql_reply {
1.12 harris41 6176: my ($cmd)=@_;
1.234 foxr 6177: my $answer=&sub_sql_reply($cmd);
6178: if ($answer eq 'con_lost') { $answer=&sub_sql_reply($cmd); }
1.12 harris41 6179: return $answer;
6180: }
6181:
1.234 foxr 6182: sub sub_sql_reply {
1.12 harris41 6183: my ($cmd)=@_;
6184: my $unixsock="mysqlsock";
6185: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
6186: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
6187: Type => SOCK_STREAM,
6188: Timeout => 10)
6189: or return "con_lost";
1.319 www 6190: print $sclient "$cmd:$currentdomainid\n";
1.12 harris41 6191: my $answer=<$sclient>;
6192: chomp($answer);
6193: if (!$answer) { $answer="con_lost"; }
6194: return $answer;
6195: }
6196:
1.1 albertel 6197: # --------------------------------------- Is this the home server of an author?
1.11 www 6198:
1.1 albertel 6199: sub ishome {
6200: my $author=shift;
6201: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
6202: my ($udom,$uname)=split(/\//,$author);
6203: my $proname=propath($udom,$uname);
6204: if (-e $proname) {
6205: return 'owner';
6206: } else {
6207: return 'not_owner';
6208: }
6209: }
6210:
6211: # ======================================================= Continue main program
6212: # ---------------------------------------------------- Fork once and dissociate
6213:
1.134 albertel 6214: my $fpid=fork;
1.1 albertel 6215: exit if $fpid;
1.29 harris41 6216: die "Couldn't fork: $!" unless defined ($fpid);
1.1 albertel 6217:
1.29 harris41 6218: POSIX::setsid() or die "Can't start new session: $!";
1.1 albertel 6219:
6220: # ------------------------------------------------------- Write our PID on disk
6221:
1.134 albertel 6222: my $execdir=$perlvar{'lonDaemons'};
1.1 albertel 6223: open (PIDSAVE,">$execdir/logs/lond.pid");
6224: print PIDSAVE "$$\n";
6225: close(PIDSAVE);
1.190 albertel 6226: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
1.57 www 6227: &status('Starting');
1.1 albertel 6228:
1.106 foxr 6229:
1.1 albertel 6230:
6231: # ----------------------------------------------------- Install signal handlers
6232:
1.57 www 6233:
1.1 albertel 6234: $SIG{CHLD} = \&REAPER;
6235: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
6236: $SIG{HUP} = \&HUPSMAN;
1.57 www 6237: $SIG{USR1} = \&checkchildren;
1.144 foxr 6238: $SIG{USR2} = \&UpdateHosts;
1.106 foxr 6239:
1.148 foxr 6240: # Read the host hashes:
1.368 albertel 6241: &Apache::lonnet::load_hosts_tab();
1.106 foxr 6242:
1.286 albertel 6243: my $dist=`$perlvar{'lonDaemons'}/distprobe`;
6244:
1.106 foxr 6245: # --------------------------------------------------------------
6246: # Accept connections. When a connection comes in, it is validated
6247: # and if good, a child process is created to process transactions
6248: # along the connection.
6249:
1.1 albertel 6250: while (1) {
1.165 albertel 6251: &status('Starting accept');
1.106 foxr 6252: $client = $server->accept() or next;
1.165 albertel 6253: &status('Accepted '.$client.' off to spawn');
1.386 albertel 6254: make_new_child($client);
1.165 albertel 6255: &status('Finished spawning');
1.1 albertel 6256: }
6257:
1.212 foxr 6258: sub make_new_child {
6259: my $pid;
6260: # my $cipher; # Now global
6261: my $sigset;
1.178 foxr 6262:
1.212 foxr 6263: $client = shift;
6264: &status('Starting new child '.$client);
6265: &logthis('<font color="green"> Attempting to start child ('.$client.
6266: ")</font>");
6267: # block signal for fork
6268: $sigset = POSIX::SigSet->new(SIGINT);
6269: sigprocmask(SIG_BLOCK, $sigset)
6270: or die "Can't block SIGINT for fork: $!\n";
1.178 foxr 6271:
1.212 foxr 6272: die "fork: $!" unless defined ($pid = fork);
1.178 foxr 6273:
1.212 foxr 6274: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
6275: # connection liveness.
1.178 foxr 6276:
1.212 foxr 6277: #
6278: # Figure out who we're talking to so we can record the peer in
6279: # the pid hash.
6280: #
6281: my $caller = getpeername($client);
6282: my ($port,$iaddr);
6283: if (defined($caller) && length($caller) > 0) {
6284: ($port,$iaddr)=unpack_sockaddr_in($caller);
6285: } else {
6286: &logthis("Unable to determine who caller was, getpeername returned nothing");
6287: }
6288: if (defined($iaddr)) {
6289: $clientip = inet_ntoa($iaddr);
6290: Debug("Connected with $clientip");
6291: } else {
6292: &logthis("Unable to determine clientip");
6293: $clientip='Unavailable';
6294: }
6295:
6296: if ($pid) {
6297: # Parent records the child's birth and returns.
6298: sigprocmask(SIG_UNBLOCK, $sigset)
6299: or die "Can't unblock SIGINT for fork: $!\n";
6300: $children{$pid} = $clientip;
6301: &status('Started child '.$pid);
6302: return;
6303: } else {
6304: # Child can *not* return from this subroutine.
6305: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
6306: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
6307: #don't get intercepted
6308: $SIG{USR1}= \&logstatus;
6309: $SIG{ALRM}= \&timeout;
6310: $lastlog='Forked ';
6311: $status='Forked';
1.178 foxr 6312:
1.212 foxr 6313: # unblock signals
6314: sigprocmask(SIG_UNBLOCK, $sigset)
6315: or die "Can't unblock SIGINT for fork: $!\n";
1.178 foxr 6316:
1.212 foxr 6317: # my $tmpsnum=0; # Now global
6318: #---------------------------------------------------- kerberos 5 initialization
6319: &Authen::Krb5::init_context();
1.359 raeburn 6320: unless (($dist eq 'fedora5') || ($dist eq 'fedora4') ||
6321: ($dist eq 'fedora6') || ($dist eq 'suse9.3')) {
1.286 albertel 6322: &Authen::Krb5::init_ets();
6323: }
1.209 albertel 6324:
1.212 foxr 6325: &status('Accepted connection');
6326: # =============================================================================
6327: # do something with the connection
6328: # -----------------------------------------------------------------------------
6329: # see if we know client and 'check' for spoof IP by ineffective challenge
1.178 foxr 6330:
1.278 albertel 6331: my $outsideip=$clientip;
6332: if ($clientip eq '127.0.0.1') {
1.368 albertel 6333: $outsideip=&Apache::lonnet::get_host_ip($perlvar{'lonHostID'});
1.278 albertel 6334: }
1.412 foxr 6335: &ReadManagerTable();
1.368 albertel 6336: my $clientrec=defined(&Apache::lonnet::get_hosts_from_ip($outsideip));
1.278 albertel 6337: my $ismanager=($managers{$outsideip} ne undef);
1.432 raeburn 6338: $clientname = "[unknown]";
1.212 foxr 6339: if($clientrec) { # Establish client type.
6340: $ConnectionType = "client";
1.368 albertel 6341: $clientname = (&Apache::lonnet::get_hosts_from_ip($outsideip))[-1];
1.212 foxr 6342: if($ismanager) {
6343: $ConnectionType = "both";
6344: }
6345: } else {
6346: $ConnectionType = "manager";
1.278 albertel 6347: $clientname = $managers{$outsideip};
1.212 foxr 6348: }
6349: my $clientok;
1.178 foxr 6350:
1.212 foxr 6351: if ($clientrec || $ismanager) {
6352: &status("Waiting for init from $clientip $clientname");
6353: &logthis('<font color="yellow">INFO: Connection, '.
6354: $clientip.
6355: " ($clientname) connection type = $ConnectionType </font>" );
6356: &status("Connecting $clientip ($clientname))");
6357: my $remotereq=<$client>;
6358: chomp($remotereq);
6359: Debug("Got init: $remotereq");
1.337 albertel 6360:
1.212 foxr 6361: if ($remotereq =~ /^init/) {
6362: &sethost("sethost:$perlvar{'lonHostID'}");
6363: #
6364: # If the remote is attempting a local init... give that a try:
6365: #
1.432 raeburn 6366: (my $i, my $inittype, $clientversion) = split(/:/, $remotereq);
1.209 albertel 6367:
1.212 foxr 6368: # If the connection type is ssl, but I didn't get my
6369: # certificate files yet, then I'll drop back to
6370: # insecure (if allowed).
6371:
6372: if($inittype eq "ssl") {
6373: my ($ca, $cert) = lonssl::CertificateFile;
6374: my $kfile = lonssl::KeyFile;
6375: if((!$ca) ||
6376: (!$cert) ||
6377: (!$kfile)) {
6378: $inittype = ""; # This forces insecure attempt.
6379: &logthis("<font color=\"blue\"> Certificates not "
6380: ."installed -- trying insecure auth</font>");
1.224 foxr 6381: } else { # SSL certificates are in place so
1.212 foxr 6382: } # Leave the inittype alone.
6383: }
6384:
6385: if($inittype eq "local") {
1.432 raeburn 6386: $clientversion = $perlvar{'lonVersion'};
1.212 foxr 6387: my $key = LocalConnection($client, $remotereq);
6388: if($key) {
6389: Debug("Got local key $key");
6390: $clientok = 1;
6391: my $cipherkey = pack("H32", $key);
6392: $cipher = new IDEA($cipherkey);
6393: print $client "ok:local\n";
6394: &logthis('<font color="green"'
6395: . "Successful local authentication </font>");
6396: $keymode = "local"
1.178 foxr 6397: } else {
1.212 foxr 6398: Debug("Failed to get local key");
6399: $clientok = 0;
6400: shutdown($client, 3);
6401: close $client;
1.178 foxr 6402: }
1.212 foxr 6403: } elsif ($inittype eq "ssl") {
6404: my $key = SSLConnection($client);
6405: if ($key) {
6406: $clientok = 1;
6407: my $cipherkey = pack("H32", $key);
6408: $cipher = new IDEA($cipherkey);
6409: &logthis('<font color="green">'
6410: ."Successfull ssl authentication with $clientname </font>");
6411: $keymode = "ssl";
6412:
1.178 foxr 6413: } else {
1.212 foxr 6414: $clientok = 0;
6415: close $client;
1.178 foxr 6416: }
1.212 foxr 6417:
6418: } else {
6419: my $ok = InsecureConnection($client);
6420: if($ok) {
6421: $clientok = 1;
6422: &logthis('<font color="green">'
6423: ."Successful insecure authentication with $clientname </font>");
6424: print $client "ok\n";
6425: $keymode = "insecure";
1.178 foxr 6426: } else {
1.212 foxr 6427: &logthis('<font color="yellow">'
6428: ."Attempted insecure connection disallowed </font>");
6429: close $client;
6430: $clientok = 0;
1.178 foxr 6431:
6432: }
6433: }
1.212 foxr 6434: } else {
6435: &logthis(
6436: "<font color='blue'>WARNING: "
6437: ."$clientip failed to initialize: >$remotereq< </font>");
6438: &status('No init '.$clientip);
6439: }
6440:
6441: } else {
6442: &logthis(
6443: "<font color='blue'>WARNING: Unknown client $clientip</font>");
6444: &status('Hung up on '.$clientip);
6445: }
6446:
6447: if ($clientok) {
6448: # ---------------- New known client connecting, could mean machine online again
1.368 albertel 6449: if (&Apache::lonnet::get_host_ip($currenthostid) ne $clientip
1.367 albertel 6450: && $clientip ne '127.0.0.1') {
1.375 albertel 6451: &Apache::lonnet::reconlonc($clientname);
1.212 foxr 6452: }
6453: &logthis("<font color='green'>Established connection: $clientname</font>");
6454: &status('Will listen to '.$clientname);
6455: # ------------------------------------------------------------ Process requests
6456: my $keep_going = 1;
6457: my $user_input;
6458: while(($user_input = get_request) && $keep_going) {
6459: alarm(120);
6460: Debug("Main: Got $user_input\n");
6461: $keep_going = &process_request($user_input);
1.178 foxr 6462: alarm(0);
1.212 foxr 6463: &status('Listening to '.$clientname." ($keymode)");
1.161 foxr 6464: }
1.212 foxr 6465:
1.59 www 6466: # --------------------------------------------- client unknown or fishy, refuse
1.212 foxr 6467: } else {
1.161 foxr 6468: print $client "refused\n";
6469: $client->close();
1.190 albertel 6470: &logthis("<font color='blue'>WARNING: "
1.161 foxr 6471: ."Rejected client $clientip, closing connection</font>");
6472: }
1.212 foxr 6473: }
1.161 foxr 6474:
1.1 albertel 6475: # =============================================================================
1.161 foxr 6476:
1.190 albertel 6477: &logthis("<font color='red'>CRITICAL: "
1.161 foxr 6478: ."Disconnect from $clientip ($clientname)</font>");
6479:
6480:
6481: # this exit is VERY important, otherwise the child will become
6482: # a producer of more and more children, forking yourself into
6483: # process death.
6484: exit;
1.106 foxr 6485:
1.78 foxr 6486: }
1.261 foxr 6487: #
6488: # Determine if a user is an author for the indicated domain.
6489: #
6490: # Parameters:
6491: # domain - domain to check in .
6492: # user - Name of user to check.
6493: #
6494: # Return:
6495: # 1 - User is an author for domain.
6496: # 0 - User is not an author for domain.
6497: sub is_author {
6498: my ($domain, $user) = @_;
6499:
6500: &Debug("is_author: $user @ $domain");
6501:
6502: my $hashref = &tie_user_hash($domain, $user, "roles",
6503: &GDBM_READER());
6504:
6505: # Author role should show up as a key /domain/_au
1.78 foxr 6506:
1.321 albertel 6507: my $key = "/$domain/_au";
6508: my $value;
6509: if (defined($hashref)) {
6510: $value = $hashref->{$key};
6511: }
1.78 foxr 6512:
1.261 foxr 6513: if(defined($value)) {
6514: &Debug("$user @ $domain is an author");
6515: }
6516:
6517: return defined($value);
6518: }
1.78 foxr 6519: #
6520: # Checks to see if the input roleput request was to set
6521: # an author role. If so, invokes the lchtmldir script to set
6522: # up a correct public_html
6523: # Parameters:
6524: # request - The request sent to the rolesput subchunk.
6525: # We're looking for /domain/_au
6526: # domain - The domain in which the user is having roles doctored.
6527: # user - Name of the user for which the role is being put.
6528: # authtype - The authentication type associated with the user.
6529: #
1.289 albertel 6530: sub manage_permissions {
1.192 foxr 6531: my ($request, $domain, $user, $authtype) = @_;
1.78 foxr 6532:
1.261 foxr 6533: &Debug("manage_permissions: $request $domain $user $authtype");
6534:
1.78 foxr 6535: # See if the request is of the form /$domain/_au
1.289 albertel 6536: if($request =~ /^(\/\Q$domain\E\/_au)$/) { # It's an author rolesput...
1.78 foxr 6537: my $execdir = $perlvar{'lonDaemons'};
6538: my $userhome= "/home/$user" ;
1.134 albertel 6539: &logthis("system $execdir/lchtmldir $userhome $user $authtype");
1.261 foxr 6540: &Debug("Setting homedir permissions for $userhome");
1.78 foxr 6541: system("$execdir/lchtmldir $userhome $user $authtype");
6542: }
6543: }
1.222 foxr 6544:
6545:
6546: #
6547: # Return the full path of a user password file, whether it exists or not.
6548: # Parameters:
6549: # domain - Domain in which the password file lives.
6550: # user - name of the user.
6551: # Returns:
6552: # Full passwd path:
6553: #
6554: sub password_path {
6555: my ($domain, $user) = @_;
1.264 albertel 6556: return &propath($domain, $user).'/passwd';
1.222 foxr 6557: }
6558:
6559: # Password Filename
6560: # Returns the path to a passwd file given domain and user... only if
6561: # it exists.
6562: # Parameters:
6563: # domain - Domain in which to search.
6564: # user - username.
6565: # Returns:
6566: # - If the password file exists returns its path.
6567: # - If the password file does not exist, returns undefined.
6568: #
6569: sub password_filename {
6570: my ($domain, $user) = @_;
6571:
6572: Debug ("PasswordFilename called: dom = $domain user = $user");
6573:
6574: my $path = &password_path($domain, $user);
6575: Debug("PasswordFilename got path: $path");
6576: if(-e $path) {
6577: return $path;
6578: } else {
6579: return undef;
6580: }
6581: }
6582:
6583: #
6584: # Rewrite the contents of the user's passwd file.
6585: # Parameters:
6586: # domain - domain of the user.
6587: # name - User's name.
6588: # contents - New contents of the file.
6589: # Returns:
6590: # 0 - Failed.
6591: # 1 - Success.
6592: #
6593: sub rewrite_password_file {
6594: my ($domain, $user, $contents) = @_;
6595:
6596: my $file = &password_filename($domain, $user);
6597: if (defined $file) {
6598: my $pf = IO::File->new(">$file");
6599: if($pf) {
6600: print $pf "$contents\n";
6601: return 1;
6602: } else {
6603: return 0;
6604: }
6605: } else {
6606: return 0;
6607: }
6608:
6609: }
6610:
1.78 foxr 6611: #
1.222 foxr 6612: # get_auth_type - Determines the authorization type of a user in a domain.
1.78 foxr 6613:
6614: # Returns the authorization type or nouser if there is no such user.
6615: #
1.436 raeburn 6616: sub get_auth_type {
1.192 foxr 6617: my ($domain, $user) = @_;
1.78 foxr 6618:
1.222 foxr 6619: Debug("get_auth_type( $domain, $user ) \n");
1.78 foxr 6620: my $proname = &propath($domain, $user);
6621: my $passwdfile = "$proname/passwd";
6622: if( -e $passwdfile ) {
6623: my $pf = IO::File->new($passwdfile);
6624: my $realpassword = <$pf>;
6625: chomp($realpassword);
1.79 foxr 6626: Debug("Password info = $realpassword\n");
1.78 foxr 6627: my ($authtype, $contentpwd) = split(/:/, $realpassword);
1.79 foxr 6628: Debug("Authtype = $authtype, content = $contentpwd\n");
1.259 raeburn 6629: return "$authtype:$contentpwd";
1.224 foxr 6630: } else {
1.79 foxr 6631: Debug("Returning nouser");
1.78 foxr 6632: return "nouser";
6633: }
1.1 albertel 6634: }
6635:
1.220 foxr 6636: #
6637: # Validate a user given their domain, name and password. This utility
6638: # function is used by both AuthenticateHandler and ChangePasswordHandler
6639: # to validate the login credentials of a user.
6640: # Parameters:
6641: # $domain - The domain being logged into (this is required due to
6642: # the capability for multihomed systems.
6643: # $user - The name of the user being validated.
6644: # $password - The user's propoposed password.
6645: #
6646: # Returns:
6647: # 1 - The domain,user,pasword triplet corresponds to a valid
6648: # user.
6649: # 0 - The domain,user,password triplet is not a valid user.
6650: #
6651: sub validate_user {
1.396 raeburn 6652: my ($domain, $user, $password, $checkdefauth) = @_;
1.220 foxr 6653:
6654: # Why negative ~pi you may well ask? Well this function is about
6655: # authentication, and therefore very important to get right.
6656: # I've initialized the flag that determines whether or not I've
6657: # validated correctly to a value it's not supposed to get.
6658: # At the end of this function. I'll ensure that it's not still that
6659: # value so we don't just wind up returning some accidental value
6660: # as a result of executing an unforseen code path that
1.249 foxr 6661: # did not set $validated. At the end of valid execution paths,
6662: # validated shoule be 1 for success or 0 for failuer.
1.220 foxr 6663:
6664: my $validated = -3.14159;
6665:
6666: # How we authenticate is determined by the type of authentication
6667: # the user has been assigned. If the authentication type is
6668: # "nouser", the user does not exist so we will return 0.
6669:
1.222 foxr 6670: my $contents = &get_auth_type($domain, $user);
1.220 foxr 6671: my ($howpwd, $contentpwd) = split(/:/, $contents);
6672:
6673: my $null = pack("C",0); # Used by kerberos auth types.
6674:
1.395 raeburn 6675: if ($howpwd eq 'nouser') {
1.396 raeburn 6676: if ($checkdefauth) {
6677: my %domdefaults = &Apache::lonnet::get_domain_defaults($domain);
6678: if ($domdefaults{'auth_def'} eq 'localauth') {
6679: $howpwd = $domdefaults{'auth_def'};
6680: $contentpwd = $domdefaults{'auth_arg_def'};
6681: } elsif ((($domdefaults{'auth_def'} eq 'krb4') ||
6682: ($domdefaults{'auth_def'} eq 'krb5')) &&
6683: ($domdefaults{'auth_arg_def'} ne '')) {
6684: $howpwd = $domdefaults{'auth_def'};
6685: $contentpwd = $domdefaults{'auth_arg_def'};
6686: }
1.395 raeburn 6687: }
6688: }
1.220 foxr 6689: if ($howpwd ne 'nouser') {
6690: if($howpwd eq "internal") { # Encrypted is in local password file.
6691: $validated = (crypt($password, $contentpwd) eq $contentpwd);
6692: }
6693: elsif ($howpwd eq "unix") { # User is a normal unix user.
6694: $contentpwd = (getpwnam($user))[1];
6695: if($contentpwd) {
6696: if($contentpwd eq 'x') { # Shadow password file...
6697: my $pwauth_path = "/usr/local/sbin/pwauth";
6698: open PWAUTH, "|$pwauth_path" or
6699: die "Cannot invoke authentication";
6700: print PWAUTH "$user\n$password\n";
6701: close PWAUTH;
6702: $validated = ! $?;
6703:
6704: } else { # Passwords in /etc/passwd.
6705: $validated = (crypt($password,
6706: $contentpwd) eq $contentpwd);
6707: }
6708: } else {
6709: $validated = 0;
6710: }
6711: }
6712: elsif ($howpwd eq "krb4") { # user is in kerberos 4 auth. domain.
6713: if(! ($password =~ /$null/) ) {
6714: my $k4error = &Authen::Krb4::get_pw_in_tkt($user,
6715: "",
6716: $contentpwd,,
6717: 'krbtgt',
6718: $contentpwd,
6719: 1,
6720: $password);
6721: if(!$k4error) {
6722: $validated = 1;
1.224 foxr 6723: } else {
1.220 foxr 6724: $validated = 0;
6725: &logthis('krb4: '.$user.', '.$contentpwd.', '.
6726: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
6727: }
1.224 foxr 6728: } else {
1.220 foxr 6729: $validated = 0; # Password has a match with null.
6730: }
1.224 foxr 6731: } elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain.
1.220 foxr 6732: if(!($password =~ /$null/)) { # Null password not allowed.
6733: my $krbclient = &Authen::Krb5::parse_name($user.'@'
6734: .$contentpwd);
6735: my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd;
6736: my $krbserver = &Authen::Krb5::parse_name($krbservice);
6737: my $credentials= &Authen::Krb5::cc_default();
1.359 raeburn 6738: $credentials->initialize(&Authen::Krb5::parse_name($user.'@'
6739: .$contentpwd));
1.394 raeburn 6740: my $krbreturn;
6741: if (exists(&Authen::Krb5::get_init_creds_password)) {
6742: $krbreturn =
6743: &Authen::Krb5::get_init_creds_password($krbclient,$password,
6744: $krbservice);
6745: $validated = (ref($krbreturn) eq 'Authen::Krb5::Creds');
6746: } else {
6747: $krbreturn =
6748: &Authen::Krb5::get_in_tkt_with_password($krbclient,$krbserver,
6749: $password,$credentials);
6750: $validated = ($krbreturn == 1);
6751: }
1.380 albertel 6752: if (!$validated) {
6753: &logthis('krb5: '.$user.', '.$contentpwd.', '.
6754: &Authen::Krb5::error());
6755: }
1.224 foxr 6756: } else {
1.220 foxr 6757: $validated = 0;
6758: }
1.224 foxr 6759: } elsif ($howpwd eq "localauth") {
1.220 foxr 6760: # Authenticate via installation specific authentcation method:
6761: $validated = &localauth::localauth($user,
6762: $password,
1.353 albertel 6763: $contentpwd,
6764: $domain);
1.358 albertel 6765: if ($validated < 0) {
1.357 albertel 6766: &logthis("localauth for $contentpwd $user:$domain returned a $validated");
6767: $validated = 0;
6768: }
1.224 foxr 6769: } else { # Unrecognized auth is also bad.
1.220 foxr 6770: $validated = 0;
6771: }
6772: } else {
6773: $validated = 0;
6774: }
6775: #
6776: # $validated has the correct stat of the authentication:
6777: #
6778:
6779: unless ($validated != -3.14159) {
1.249 foxr 6780: # I >really really< want to know if this happens.
6781: # since it indicates that user authentication is badly
6782: # broken in some code path.
6783: #
6784: die "ValidateUser - failed to set the value of validated $domain, $user $password";
1.220 foxr 6785: }
6786: return $validated;
6787: }
6788:
6789:
1.84 albertel 6790: sub addline {
6791: my ($fname,$hostid,$ip,$newline)=@_;
6792: my $contents;
6793: my $found=0;
1.355 albertel 6794: my $expr='^'.quotemeta($hostid).':'.quotemeta($ip).':';
1.134 albertel 6795: my $sh;
1.84 albertel 6796: if ($sh=IO::File->new("$fname.subscription")) {
6797: while (my $subline=<$sh>) {
6798: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
6799: }
6800: $sh->close();
6801: }
6802: $sh=IO::File->new(">$fname.subscription");
6803: if ($contents) { print $sh $contents; }
6804: if ($newline) { print $sh $newline; }
6805: $sh->close();
6806: return $found;
1.86 www 6807: }
6808:
1.234 foxr 6809: sub get_chat {
1.324 raeburn 6810: my ($cdom,$cname,$udom,$uname,$group)=@_;
1.310 albertel 6811:
1.87 www 6812: my @entries=();
1.324 raeburn 6813: my $namespace = 'nohist_chatroom';
6814: my $namespace_inroom = 'nohist_inchatroom';
1.335 albertel 6815: if ($group ne '') {
1.324 raeburn 6816: $namespace .= '_'.$group;
6817: $namespace_inroom .= '_'.$group;
6818: }
6819: my $hashref = &tie_user_hash($cdom, $cname, $namespace,
1.310 albertel 6820: &GDBM_READER());
6821: if ($hashref) {
6822: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
1.311 albertel 6823: &untie_user_hash($hashref);
1.123 www 6824: }
1.124 www 6825: my @participants=();
1.134 albertel 6826: my $cutoff=time-60;
1.324 raeburn 6827: $hashref = &tie_user_hash($cdom, $cname, $namespace_inroom,
1.310 albertel 6828: &GDBM_WRCREAT());
6829: if ($hashref) {
6830: $hashref->{$uname.':'.$udom}=time;
6831: foreach my $user (sort(keys(%$hashref))) {
6832: if ($hashref->{$user}>$cutoff) {
6833: push(@participants, 'active_participant:'.$user);
1.123 www 6834: }
6835: }
1.311 albertel 6836: &untie_user_hash($hashref);
1.86 www 6837: }
1.124 www 6838: return (@participants,@entries);
1.86 www 6839: }
6840:
1.234 foxr 6841: sub chat_add {
1.324 raeburn 6842: my ($cdom,$cname,$newchat,$group)=@_;
1.88 albertel 6843: my @entries=();
1.142 www 6844: my $time=time;
1.324 raeburn 6845: my $namespace = 'nohist_chatroom';
6846: my $logfile = 'chatroom.log';
1.335 albertel 6847: if ($group ne '') {
1.324 raeburn 6848: $namespace .= '_'.$group;
6849: $logfile = 'chatroom_'.$group.'.log';
6850: }
6851: my $hashref = &tie_user_hash($cdom, $cname, $namespace,
1.310 albertel 6852: &GDBM_WRCREAT());
6853: if ($hashref) {
6854: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
1.88 albertel 6855: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
6856: my ($thentime,$idnum)=split(/\_/,$lastid);
6857: my $newid=$time.'_000000';
6858: if ($thentime==$time) {
6859: $idnum=~s/^0+//;
6860: $idnum++;
6861: $idnum=substr('000000'.$idnum,-6,6);
6862: $newid=$time.'_'.$idnum;
6863: }
1.310 albertel 6864: $hashref->{$newid}=$newchat;
1.88 albertel 6865: my $expired=$time-3600;
1.310 albertel 6866: foreach my $comment (keys(%$hashref)) {
6867: my ($thistime) = ($comment=~/(\d+)\_/);
1.88 albertel 6868: if ($thistime<$expired) {
1.310 albertel 6869: delete $hashref->{$comment};
1.88 albertel 6870: }
6871: }
1.310 albertel 6872: {
6873: my $proname=&propath($cdom,$cname);
1.324 raeburn 6874: if (open(CHATLOG,">>$proname/$logfile")) {
1.310 albertel 6875: print CHATLOG ("$time:".&unescape($newchat)."\n");
6876: }
6877: close(CHATLOG);
1.142 www 6878: }
1.311 albertel 6879: &untie_user_hash($hashref);
1.86 www 6880: }
1.84 albertel 6881: }
6882:
6883: sub unsub {
6884: my ($fname,$clientip)=@_;
6885: my $result;
1.188 foxr 6886: my $unsubs = 0; # Number of successful unsubscribes:
6887:
6888:
6889: # An old way subscriptions were handled was to have a
6890: # subscription marker file:
6891:
6892: Debug("Attempting unlink of $fname.$clientname");
1.161 foxr 6893: if (unlink("$fname.$clientname")) {
1.188 foxr 6894: $unsubs++; # Successful unsub via marker file.
6895: }
6896:
6897: # The more modern way to do it is to have a subscription list
6898: # file:
6899:
1.84 albertel 6900: if (-e "$fname.subscription") {
1.161 foxr 6901: my $found=&addline($fname,$clientname,$clientip,'');
1.188 foxr 6902: if ($found) {
6903: $unsubs++;
6904: }
6905: }
6906:
6907: # If either or both of these mechanisms succeeded in unsubscribing a
6908: # resource we can return ok:
6909:
6910: if($unsubs) {
6911: $result = "ok\n";
1.84 albertel 6912: } else {
1.188 foxr 6913: $result = "not_subscribed\n";
1.84 albertel 6914: }
1.188 foxr 6915:
1.84 albertel 6916: return $result;
6917: }
6918:
1.101 www 6919: sub currentversion {
6920: my $fname=shift;
6921: my $version=-1;
6922: my $ulsdir='';
6923: if ($fname=~/^(.+)\/[^\/]+$/) {
6924: $ulsdir=$1;
6925: }
1.114 albertel 6926: my ($fnamere1,$fnamere2);
6927: # remove version if already specified
1.101 www 6928: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
1.114 albertel 6929: # get the bits that go before and after the version number
6930: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
6931: $fnamere1=$1;
6932: $fnamere2='.'.$2;
6933: }
1.101 www 6934: if (-e $fname) { $version=1; }
6935: if (-e $ulsdir) {
1.134 albertel 6936: if(-d $ulsdir) {
6937: if (opendir(LSDIR,$ulsdir)) {
6938: my $ulsfn;
6939: while ($ulsfn=readdir(LSDIR)) {
1.101 www 6940: # see if this is a regular file (ignore links produced earlier)
1.134 albertel 6941: my $thisfile=$ulsdir.'/'.$ulsfn;
6942: unless (-l $thisfile) {
1.160 www 6943: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
1.134 albertel 6944: if ($1>$version) { $version=$1; }
6945: }
6946: }
6947: }
6948: closedir(LSDIR);
6949: $version++;
6950: }
6951: }
6952: }
6953: return $version;
1.101 www 6954: }
6955:
6956: sub thisversion {
6957: my $fname=shift;
6958: my $version=-1;
6959: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
6960: $version=$1;
6961: }
6962: return $version;
6963: }
6964:
1.84 albertel 6965: sub subscribe {
6966: my ($userinput,$clientip)=@_;
6967: my $result;
1.293 albertel 6968: my ($cmd,$fname)=split(/:/,$userinput,2);
1.84 albertel 6969: my $ownership=&ishome($fname);
6970: if ($ownership eq 'owner') {
1.101 www 6971: # explitly asking for the current version?
6972: unless (-e $fname) {
6973: my $currentversion=¤tversion($fname);
6974: if (&thisversion($fname)==$currentversion) {
6975: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
6976: my $root=$1;
6977: my $extension=$2;
6978: symlink($root.'.'.$extension,
6979: $root.'.'.$currentversion.'.'.$extension);
1.102 www 6980: unless ($extension=~/\.meta$/) {
6981: symlink($root.'.'.$extension.'.meta',
6982: $root.'.'.$currentversion.'.'.$extension.'.meta');
6983: }
1.101 www 6984: }
6985: }
6986: }
1.84 albertel 6987: if (-e $fname) {
6988: if (-d $fname) {
6989: $result="directory\n";
6990: } else {
1.161 foxr 6991: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
1.134 albertel 6992: my $now=time;
1.161 foxr 6993: my $found=&addline($fname,$clientname,$clientip,
6994: "$clientname:$clientip:$now\n");
1.84 albertel 6995: if ($found) { $result="$fname\n"; }
6996: # if they were subscribed to only meta data, delete that
6997: # subscription, when you subscribe to a file you also get
6998: # the metadata
6999: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
7000: $fname=~s/\/home\/httpd\/html\/res/raw/;
1.373 albertel 7001: $fname="http://".&Apache::lonnet::hostname($perlvar{'lonHostID'})."/".$fname;
1.84 albertel 7002: $result="$fname\n";
7003: }
7004: } else {
7005: $result="not_found\n";
7006: }
7007: } else {
7008: $result="rejected\n";
7009: }
7010: return $result;
7011: }
1.287 foxr 7012: # Change the passwd of a unix user. The caller must have
7013: # first verified that the user is a loncapa user.
7014: #
7015: # Parameters:
7016: # user - Unix user name to change.
7017: # pass - New password for the user.
7018: # Returns:
7019: # ok - if success
7020: # other - Some meaningfule error message string.
7021: # NOTE:
7022: # invokes a setuid script to change the passwd.
7023: sub change_unix_password {
7024: my ($user, $pass) = @_;
7025:
7026: &Debug("change_unix_password");
7027: my $execdir=$perlvar{'lonDaemons'};
7028: &Debug("Opening lcpasswd pipeline");
7029: my $pf = IO::File->new("|$execdir/lcpasswd > "
7030: ."$perlvar{'lonDaemons'}"
7031: ."/logs/lcpasswd.log");
7032: print $pf "$user\n$pass\n$pass\n";
7033: close $pf;
7034: my $err = $?;
7035: return ($err < @passwderrors) ? $passwderrors[$err] :
7036: "pwchange_falure - unknown error";
7037:
7038:
7039: }
7040:
1.91 albertel 7041:
7042: sub make_passwd_file {
1.98 foxr 7043: my ($uname, $umode,$npass,$passfilename)=@_;
1.390 raeburn 7044: my $result="ok";
1.91 albertel 7045: if ($umode eq 'krb4' or $umode eq 'krb5') {
7046: {
7047: my $pf = IO::File->new(">$passfilename");
1.261 foxr 7048: if ($pf) {
7049: print $pf "$umode:$npass\n";
7050: } else {
7051: $result = "pass_file_failed_error";
7052: }
1.91 albertel 7053: }
7054: } elsif ($umode eq 'internal') {
7055: my $salt=time;
7056: $salt=substr($salt,6,2);
7057: my $ncpass=crypt($npass,$salt);
7058: {
7059: &Debug("Creating internal auth");
7060: my $pf = IO::File->new(">$passfilename");
1.261 foxr 7061: if($pf) {
7062: print $pf "internal:$ncpass\n";
7063: } else {
7064: $result = "pass_file_failed_error";
7065: }
1.91 albertel 7066: }
7067: } elsif ($umode eq 'localauth') {
7068: {
7069: my $pf = IO::File->new(">$passfilename");
1.261 foxr 7070: if($pf) {
7071: print $pf "localauth:$npass\n";
7072: } else {
7073: $result = "pass_file_failed_error";
7074: }
1.91 albertel 7075: }
7076: } elsif ($umode eq 'unix') {
7077: {
1.186 foxr 7078: #
7079: # Don't allow the creation of privileged accounts!!! that would
7080: # be real bad!!!
7081: #
7082: my $uid = getpwnam($uname);
7083: if((defined $uid) && ($uid == 0)) {
7084: &logthis(">>>Attempted to create privilged account blocked");
7085: return "no_priv_account_error\n";
7086: }
7087:
1.223 foxr 7088: my $execpath ="$perlvar{'lonDaemons'}/"."lcuseradd";
1.224 foxr 7089:
7090: my $lc_error_file = $execdir."/tmp/lcuseradd".$$.".status";
1.91 albertel 7091: {
7092: &Debug("Executing external: ".$execpath);
1.98 foxr 7093: &Debug("user = ".$uname.", Password =". $npass);
1.132 matthew 7094: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
1.91 albertel 7095: print $se "$uname\n";
7096: print $se "$npass\n";
7097: print $se "$npass\n";
1.223 foxr 7098: print $se "$lc_error_file\n"; # Status -> unique file.
1.97 foxr 7099: }
1.285 foxr 7100: if (-r $lc_error_file) {
7101: &Debug("Opening error file: $lc_error_file");
7102: my $error = IO::File->new("< $lc_error_file");
7103: my $useraddok = <$error>;
7104: $error->close;
7105: unlink($lc_error_file);
7106:
7107: chomp $useraddok;
7108:
7109: if($useraddok > 0) {
7110: my $error_text = &lcuseraddstrerror($useraddok);
7111: &logthis("Failed lcuseradd: $error_text");
1.390 raeburn 7112: $result = "lcuseradd_failed:$error_text";
1.285 foxr 7113: } else {
7114: my $pf = IO::File->new(">$passfilename");
7115: if($pf) {
7116: print $pf "unix:\n";
7117: } else {
7118: $result = "pass_file_failed_error";
7119: }
7120: }
1.224 foxr 7121: } else {
1.285 foxr 7122: &Debug("Could not locate lcuseradd error: $lc_error_file");
7123: $result="bug_lcuseradd_no_output_file";
1.91 albertel 7124: }
7125: }
7126: } elsif ($umode eq 'none') {
7127: {
1.223 foxr 7128: my $pf = IO::File->new("> $passfilename");
1.261 foxr 7129: if($pf) {
7130: print $pf "none:\n";
7131: } else {
7132: $result = "pass_file_failed_error";
7133: }
1.91 albertel 7134: }
7135: } else {
1.390 raeburn 7136: $result="auth_mode_error";
1.91 albertel 7137: }
7138: return $result;
1.121 albertel 7139: }
7140:
1.265 albertel 7141: sub convert_photo {
7142: my ($start,$dest)=@_;
7143: system("convert $start $dest");
7144: }
7145:
1.121 albertel 7146: sub sethost {
7147: my ($remotereq) = @_;
7148: my (undef,$hostid)=split(/:/,$remotereq);
1.322 albertel 7149: # ignore sethost if we are already correct
7150: if ($hostid eq $currenthostid) {
7151: return 'ok';
7152: }
7153:
1.121 albertel 7154: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
1.368 albertel 7155: if (&Apache::lonnet::get_host_ip($perlvar{'lonHostID'})
7156: eq &Apache::lonnet::get_host_ip($hostid)) {
1.200 matthew 7157: $currenthostid =$hostid;
1.369 albertel 7158: $currentdomainid=&Apache::lonnet::host_domain($hostid);
1.386 albertel 7159: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
1.121 albertel 7160: } else {
7161: &logthis("Requested host id $hostid not an alias of ".
7162: $perlvar{'lonHostID'}." refusing connection");
7163: return 'unable_to_set';
7164: }
7165: return 'ok';
7166: }
7167:
7168: sub version {
7169: my ($userinput)=@_;
7170: $remoteVERSION=(split(/:/,$userinput))[1];
7171: return "version:$VERSION";
1.127 albertel 7172: }
1.178 foxr 7173:
1.200 matthew 7174:
1.61 harris41 7175: # ----------------------------------- POD (plain old documentation, CPAN style)
7176:
7177: =head1 NAME
7178:
7179: lond - "LON Daemon" Server (port "LOND" 5663)
7180:
7181: =head1 SYNOPSIS
7182:
1.74 harris41 7183: Usage: B<lond>
7184:
7185: Should only be run as user=www. This is a command-line script which
7186: is invoked by B<loncron>. There is no expectation that a typical user
7187: will manually start B<lond> from the command-line. (In other words,
7188: DO NOT START B<lond> YOURSELF.)
1.61 harris41 7189:
7190: =head1 DESCRIPTION
7191:
1.74 harris41 7192: There are two characteristics associated with the running of B<lond>,
7193: PROCESS MANAGEMENT (starting, stopping, handling child processes)
7194: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
7195: subscriptions, etc). These are described in two large
7196: sections below.
7197:
7198: B<PROCESS MANAGEMENT>
7199:
1.61 harris41 7200: Preforker - server who forks first. Runs as a daemon. HUPs.
7201: Uses IDEA encryption
7202:
1.74 harris41 7203: B<lond> forks off children processes that correspond to the other servers
7204: in the network. Management of these processes can be done at the
7205: parent process level or the child process level.
7206:
7207: B<logs/lond.log> is the location of log messages.
7208:
7209: The process management is now explained in terms of linux shell commands,
7210: subroutines internal to this code, and signal assignments:
7211:
7212: =over 4
7213:
7214: =item *
7215:
7216: PID is stored in B<logs/lond.pid>
7217:
7218: This is the process id number of the parent B<lond> process.
7219:
7220: =item *
7221:
7222: SIGTERM and SIGINT
7223:
7224: Parent signal assignment:
7225: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
7226:
7227: Child signal assignment:
7228: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
7229: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
7230: to restart a new child.)
7231:
7232: Command-line invocations:
7233: B<kill> B<-s> SIGTERM I<PID>
7234: B<kill> B<-s> SIGINT I<PID>
7235:
7236: Subroutine B<HUNTSMAN>:
7237: This is only invoked for the B<lond> parent I<PID>.
7238: This kills all the children, and then the parent.
7239: The B<lonc.pid> file is cleared.
7240:
7241: =item *
7242:
7243: SIGHUP
7244:
7245: Current bug:
7246: This signal can only be processed the first time
7247: on the parent process. Subsequent SIGHUP signals
7248: have no effect.
7249:
7250: Parent signal assignment:
7251: $SIG{HUP} = \&HUPSMAN;
7252:
7253: Child signal assignment:
7254: none (nothing happens)
7255:
7256: Command-line invocations:
7257: B<kill> B<-s> SIGHUP I<PID>
7258:
7259: Subroutine B<HUPSMAN>:
7260: This is only invoked for the B<lond> parent I<PID>,
7261: This kills all the children, and then the parent.
7262: The B<lond.pid> file is cleared.
7263:
7264: =item *
7265:
7266: SIGUSR1
7267:
7268: Parent signal assignment:
7269: $SIG{USR1} = \&USRMAN;
7270:
7271: Child signal assignment:
7272: $SIG{USR1}= \&logstatus;
7273:
7274: Command-line invocations:
7275: B<kill> B<-s> SIGUSR1 I<PID>
7276:
7277: Subroutine B<USRMAN>:
7278: When invoked for the B<lond> parent I<PID>,
7279: SIGUSR1 is sent to all the children, and the status of
7280: each connection is logged.
1.144 foxr 7281:
7282: =item *
7283:
7284: SIGUSR2
7285:
7286: Parent Signal assignment:
7287: $SIG{USR2} = \&UpdateHosts
7288:
7289: Child signal assignment:
7290: NONE
7291:
1.74 harris41 7292:
7293: =item *
7294:
7295: SIGCHLD
7296:
7297: Parent signal assignment:
7298: $SIG{CHLD} = \&REAPER;
7299:
7300: Child signal assignment:
7301: none
7302:
7303: Command-line invocations:
7304: B<kill> B<-s> SIGCHLD I<PID>
7305:
7306: Subroutine B<REAPER>:
7307: This is only invoked for the B<lond> parent I<PID>.
7308: Information pertaining to the child is removed.
7309: The socket port is cleaned up.
7310:
7311: =back
7312:
7313: B<SERVER-SIDE ACTIVITIES>
7314:
7315: Server-side information can be accepted in an encrypted or non-encrypted
7316: method.
7317:
7318: =over 4
7319:
7320: =item ping
7321:
7322: Query a client in the hosts.tab table; "Are you there?"
7323:
7324: =item pong
7325:
7326: Respond to a ping query.
7327:
7328: =item ekey
7329:
7330: Read in encrypted key, make cipher. Respond with a buildkey.
7331:
7332: =item load
7333:
7334: Respond with CPU load based on a computation upon /proc/loadavg.
7335:
7336: =item currentauth
7337:
7338: Reply with current authentication information (only over an
7339: encrypted channel).
7340:
7341: =item auth
7342:
7343: Only over an encrypted channel, reply as to whether a user's
7344: authentication information can be validated.
7345:
7346: =item passwd
7347:
7348: Allow for a password to be set.
7349:
7350: =item makeuser
7351:
7352: Make a user.
7353:
7354: =item passwd
7355:
7356: Allow for authentication mechanism and password to be changed.
7357:
7358: =item home
1.61 harris41 7359:
1.74 harris41 7360: Respond to a question "are you the home for a given user?"
7361:
7362: =item update
7363:
7364: Update contents of a subscribed resource.
7365:
7366: =item unsubscribe
7367:
7368: The server is unsubscribing from a resource.
7369:
7370: =item subscribe
7371:
7372: The server is subscribing to a resource.
7373:
7374: =item log
7375:
7376: Place in B<logs/lond.log>
7377:
7378: =item put
7379:
7380: stores hash in namespace
7381:
1.230 foxr 7382: =item rolesputy
1.74 harris41 7383:
7384: put a role into a user's environment
7385:
7386: =item get
7387:
7388: returns hash with keys from array
7389: reference filled in from namespace
7390:
7391: =item eget
7392:
7393: returns hash with keys from array
7394: reference filled in from namesp (encrypts the return communication)
7395:
7396: =item rolesget
7397:
7398: get a role from a user's environment
7399:
7400: =item del
7401:
7402: deletes keys out of array from namespace
7403:
7404: =item keys
7405:
7406: returns namespace keys
7407:
7408: =item dump
7409:
7410: dumps the complete (or key matching regexp) namespace into a hash
7411:
7412: =item store
7413:
7414: stores hash permanently
7415: for this url; hashref needs to be given and should be a \%hashname; the
7416: remaining args aren't required and if they aren't passed or are '' they will
7417: be derived from the ENV
7418:
7419: =item restore
7420:
7421: returns a hash for a given url
7422:
7423: =item querysend
7424:
7425: Tells client about the lonsql process that has been launched in response
7426: to a sent query.
7427:
7428: =item queryreply
7429:
7430: Accept information from lonsql and make appropriate storage in temporary
7431: file space.
7432:
7433: =item idput
7434:
7435: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
7436: for each student, defined perhaps by the institutional Registrar.)
7437:
7438: =item idget
7439:
7440: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
7441: for each student, defined perhaps by the institutional Registrar.)
7442:
7443: =item tmpput
7444:
7445: Accept and store information in temporary space.
7446:
7447: =item tmpget
7448:
7449: Send along temporarily stored information.
7450:
7451: =item ls
7452:
7453: List part of a user's directory.
7454:
1.135 foxr 7455: =item pushtable
7456:
7457: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
7458: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
7459: must be restored manually in case of a problem with the new table file.
7460: pushtable requires that the request be encrypted and validated via
7461: ValidateManager. The form of the command is:
7462: enc:pushtable tablename <tablecontents> \n
7463: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
7464: cleartext newline.
7465:
1.74 harris41 7466: =item Hanging up (exit or init)
7467:
7468: What to do when a client tells the server that they (the client)
7469: are leaving the network.
7470:
7471: =item unknown command
7472:
7473: If B<lond> is sent an unknown command (not in the list above),
7474: it replys to the client "unknown_cmd".
1.135 foxr 7475:
1.74 harris41 7476:
7477: =item UNKNOWN CLIENT
7478:
7479: If the anti-spoofing algorithm cannot verify the client,
7480: the client is rejected (with a "refused" message sent
7481: to the client, and the connection is closed.
7482:
7483: =back
1.61 harris41 7484:
7485: =head1 PREREQUISITES
7486:
7487: IO::Socket
7488: IO::File
7489: Apache::File
7490: POSIX
7491: Crypt::IDEA
7492: LWP::UserAgent()
7493: GDBM_File
7494: Authen::Krb4
1.91 albertel 7495: Authen::Krb5
1.61 harris41 7496:
7497: =head1 COREQUISITES
7498:
7499: =head1 OSNAMES
7500:
7501: linux
7502:
7503: =head1 SCRIPT CATEGORIES
7504:
7505: Server/Process
7506:
7507: =cut
1.409 foxr 7508:
7509:
7510: =pod
7511:
7512: =head1 LOG MESSAGES
7513:
7514: The messages below can be emitted in the lond log. This log is located
7515: in ~httpd/perl/logs/lond.log Many log messages have HTML encapsulation
7516: to provide coloring if examined from inside a web page. Some do not.
7517: Where color is used, the colors are; Red for sometihhng to get excited
7518: about and to follow up on. Yellow for something to keep an eye on to
7519: be sure it does not get worse, Green,and Blue for informational items.
7520:
7521: In the discussions below, sometimes reference is made to ~httpd
7522: when describing file locations. There isn't really an httpd
7523: user, however there is an httpd directory that gets installed in the
7524: place that user home directories go. On linux, this is usually
7525: (always?) /home/httpd.
7526:
7527:
7528: Some messages are colorless. These are usually (not always)
7529: Green/Blue color level messages.
7530:
7531: =over 2
7532:
7533: =item (Red) LocalConnection rejecting non local: <ip> ne 127.0.0.1
7534:
7535: A local connection negotiation was attempted by
7536: a host whose IP address was not 127.0.0.1.
7537: The socket is closed and the child will exit.
7538: lond has three ways to establish an encyrption
7539: key with a client:
7540:
7541: =over 2
7542:
7543: =item local
7544:
7545: The key is written and read from a file.
7546: This is only valid for connections from localhost.
7547:
7548: =item insecure
7549:
7550: The key is generated by the server and
7551: transmitted to the client.
7552:
7553: =item ssl (secure)
7554:
7555: An ssl connection is negotiated with the client,
7556: the key is generated by the server and sent to the
7557: client across this ssl connection before the
7558: ssl connectionis terminated and clear text
7559: transmission resumes.
7560:
7561: =back
7562:
7563: =item (Red) LocalConnection: caller is insane! init = <init> and type = <type>
7564:
7565: The client is local but has not sent an initialization
7566: string that is the literal "init:local" The connection
7567: is closed and the child exits.
7568:
7569: =item Red CRITICAL Can't get key file <error>
7570:
7571: SSL key negotiation is being attempted but the call to
7572: lonssl::KeyFile failed. This usually means that the
7573: configuration file is not correctly defining or protecting
7574: the directories/files lonCertificateDirectory or
7575: lonnetPrivateKey
7576: <error> is a string that describes the reason that
7577: the key file could not be located.
7578:
7579: =item (Red) CRITICAL Can't get certificates <error>
7580:
7581: SSL key negotiation failed because we were not able to retrives our certificate
7582: or the CA's certificate in the call to lonssl::CertificateFile
7583: <error> is the textual reason this failed. Usual reasons:
7584:
7585: =over 2
7586:
7587: =item Apache config file for loncapa incorrect:
7588:
7589: one of the variables
7590: lonCertificateDirectory, lonnetCertificateAuthority, or lonnetCertificate
7591: undefined or incorrect
7592:
7593: =item Permission error:
7594:
7595: The directory pointed to by lonCertificateDirectory is not readable by lond
7596:
7597: =item Permission error:
7598:
7599: Files in the directory pointed to by lonCertificateDirectory are not readable by lond.
7600:
7601: =item Installation error:
7602:
7603: Either the certificate authority file or the certificate have not
7604: been installed in lonCertificateDirectory.
7605:
7606: =item (Red) CRITICAL SSL Socket promotion failed: <err>
7607:
7608: The promotion of the connection from plaintext to SSL failed
7609: <err> is the reason for the failure. There are two
7610: system calls involved in the promotion (one of which failed),
7611: a dup to produce
7612: a second fd on the raw socket over which the encrypted data
7613: will flow and IO::SOcket::SSL->new_from_fd which creates
7614: the SSL connection on the duped fd.
7615:
7616: =item (Blue) WARNING client did not respond to challenge
7617:
7618: This occurs on an insecure (non SSL) connection negotiation request.
7619: lond generates some number from the time, the PID and sends it to
7620: the client. The client must respond by echoing this information back.
7621: If the client does not do so, that's a violation of the challenge
7622: protocols and the connection will be failed.
7623:
7624: =item (Red) No manager table. Nobody can manage!!
7625:
7626: lond has the concept of privileged hosts that
7627: can perform remote management function such
7628: as update the hosts.tab. The manager hosts
7629: are described in the
7630: ~httpd/lonTabs/managers.tab file.
7631: this message is logged if this file is missing.
7632:
7633:
7634: =item (Green) Registering manager <dnsname> as <cluster_name> with <ipaddress>
7635:
7636: Reports the successful parse and registration
7637: of a specific manager.
7638:
7639: =item Green existing host <clustername:dnsname>
7640:
7641: The manager host is already defined in the hosts.tab
7642: the information in that table, rather than the info in the
7643: manager table will be used to determine the manager's ip.
7644:
7645: =item (Red) Unable to craete <filename>
7646:
7647: lond has been asked to create new versions of an administrative
7648: file (by a manager). When this is done, the new file is created
7649: in a temp file and then renamed into place so that there are always
7650: usable administrative files, even if the update fails. This failure
7651: message means that the temp file could not be created.
7652: The update is abandoned, and the old file is available for use.
7653:
7654: =item (Green) CopyFile from <oldname> to <newname> failed
7655:
7656: In an update of administrative files, the copy of the existing file to a
7657: backup file failed. The installation of the new file may still succeed,
7658: but there will not be a back up file to rever to (this should probably
7659: be yellow).
7660:
7661: =item (Green) Pushfile: backed up <oldname> to <newname>
7662:
7663: See above, the backup of the old administrative file succeeded.
7664:
7665: =item (Red) Pushfile: Unable to install <filename> <reason>
7666:
7667: The new administrative file could not be installed. In this case,
7668: the old administrative file is still in use.
7669:
7670: =item (Green) Installed new < filename>.
7671:
7672: The new administrative file was successfullly installed.
7673:
7674: =item (Red) Reinitializing lond pid=<pid>
7675:
7676: The lonc child process <pid> will be sent a USR2
7677: signal.
7678:
7679: =item (Red) Reinitializing self
7680:
7681: We've been asked to re-read our administrative files,and
7682: are doing so.
7683:
7684: =item (Yellow) error:Invalid process identifier <ident>
7685:
7686: A reinit command was received, but the target part of the
7687: command was not valid. It must be either
7688: 'lond' or 'lonc' but was <ident>
7689:
7690: =item (Green) isValideditCommand checking: Command = <command> Key = <key> newline = <newline>
7691:
7692: Checking to see if lond has been handed a valid edit
7693: command. It is possible the edit command is not valid
7694: in that case there are no log messages to indicate that.
7695:
7696: =item Result of password change for <username> pwchange_success
7697:
7698: The password for <username> was
7699: successfully changed.
7700:
7701: =item Unable to open <user> passwd to change password
7702:
7703: Could not rewrite the
7704: internal password file for a user
7705:
7706: =item Result of password change for <user> : <result>
7707:
7708: A unix password change for <user> was attempted
7709: and the pipe returned <result>
7710:
7711: =item LWP GET: <message> for <fname> (<remoteurl>)
7712:
7713: The lightweight process fetch for a resource failed
7714: with <message> the local filename that should
7715: have existed/been created was <fname> the
7716: corresponding URI: <remoteurl> This is emitted in several
7717: places.
7718:
7719: =item Unable to move <transname> to <destname>
7720:
7721: From fetch_user_file_handler - the user file was replicated but could not
7722: be mv'd to its final location.
7723:
7724: =item Looking for <domain> <username>
7725:
7726: From user_has_session_handler - This should be a Debug call instead
7727: it indicates lond is about to check whether the specified user has a
7728: session active on the specified domain on the local host.
7729:
7730: =item Client <ip> (<name>) hanging up: <input>
7731:
7732: lond has been asked to exit by its client. The <ip> and <name> identify the
7733: client systemand <input> is the full exit command sent to the server.
7734:
7735: =item Red CRITICAL: ABNORMAL EXIT. child <pid> for server <hostname> died through a crass with this error->[<message>].
7736:
7737: A lond child terminated. NOte that this termination can also occur when the
7738: child receives the QUIT or DIE signals. <pid> is the process id of the child,
7739: <hostname> the host lond is working for, and <message> the reason the child died
7740: to the best of our ability to get it (I would guess that any numeric value
7741: represents and errno value). This is immediately followed by
7742:
7743: =item Famous last words: Catching exception - <log>
7744:
7745: Where log is some recent information about the state of the child.
7746:
7747: =item Red CRITICAL: TIME OUT <pid>
7748:
7749: Some timeout occured for server <pid>. THis is normally a timeout on an LWP
7750: doing an HTTP::GET.
7751:
7752: =item child <pid> died
7753:
7754: The reaper caught a SIGCHILD for the lond child process <pid>
7755: This should be modified to also display the IP of the dying child
7756: $children{$pid}
7757:
7758: =item Unknown child 0 died
7759: A child died but the wait for it returned a pid of zero which really should not
7760: ever happen.
7761:
7762: =item Child <which> - <pid> looks like we missed it's death
7763:
7764: When a sigchild is received, the reaper process checks all children to see if they are
7765: alive. If children are dying quite quickly, the lack of signal queuing can mean
7766: that a signal hearalds the death of more than one child. If so this message indicates
7767: which other one died. <which> is the ip of a dead child
7768:
7769: =item Free socket: <shutdownretval>
7770:
7771: The HUNTSMAN sub was called due to a SIGINT in a child process. The socket is being shutdown.
7772: for whatever reason, <shutdownretval> is printed but in fact shutdown() is not documented
7773: to return anything. This is followed by:
7774:
7775: =item Red CRITICAL: Shutting down
7776:
7777: Just prior to exit.
7778:
7779: =item Free socket: <shutdownretval>
7780:
7781: The HUPSMAN sub was called due to a SIGHUP. all children get killsed, and lond execs itself.
7782: This is followed by:
7783:
7784: =item (Red) CRITICAL: Restarting
7785:
7786: lond is about to exec itself to restart.
7787:
7788: =item (Blue) Updating connections
7789:
7790: (In response to a USR2). All the children (except the one for localhost)
7791: are about to be killed, the hosts tab reread, and Apache reloaded via apachereload.
7792:
7793: =item (Blue) UpdateHosts killing child <pid> for ip <ip>
7794:
7795: Due to USR2 as above.
7796:
7797: =item (Green) keeping child for ip <ip> (pid = <pid>)
7798:
7799: In response to USR2 as above, the child indicated is not being restarted because
7800: it's assumed that we'll always need a child for the localhost.
7801:
7802:
7803: =item Going to check on the children
7804:
7805: Parent is about to check on the health of the child processes.
7806: Note that this is in response to a USR1 sent to the parent lond.
7807: there may be one or more of the next two messages:
7808:
7809: =item <pid> is dead
7810:
7811: A child that we have in our child hash as alive has evidently died.
7812:
7813: =item Child <pid> did not respond
7814:
7815: In the health check the child <pid> did not update/produce a pid_.txt
7816: file when sent it's USR1 signal. That process is killed with a 9 signal, as it's
7817: assumed to be hung in some un-fixable way.
7818:
7819: =item Finished checking children
7820:
7821: Master processs's USR1 processing is cojmplete.
7822:
7823: =item (Red) CRITICAL: ------- Starting ------
7824:
7825: (There are more '-'s on either side). Lond has forked itself off to
7826: form a new session and is about to start actual initialization.
7827:
7828: =item (Green) Attempting to start child (<client>)
7829:
7830: Started a new child process for <client>. Client is IO::Socket object
7831: connected to the child. This was as a result of a TCP/IP connection from a client.
7832:
7833: =item Unable to determine who caller was, getpeername returned nothing
7834:
7835: In child process initialization. either getpeername returned undef or
7836: a zero sized object was returned. Processing continues, but in my opinion,
7837: this should be cause for the child to exit.
7838:
7839: =item Unable to determine clientip
7840:
7841: In child process initialization. The peer address from getpeername was not defined.
7842: The client address is stored as "Unavailable" and processing continues.
7843:
7844: =item (Yellow) INFO: Connection <ip> <name> connection type = <type>
7845:
7846: In child initialization. A good connectionw as received from <ip>.
7847:
7848: =over 2
7849:
7850: =item <name>
7851:
7852: is the name of the client from hosts.tab.
7853:
7854: =item <type>
7855:
7856: Is the connection type which is either
7857:
7858: =over 2
7859:
7860: =item manager
7861:
7862: The connection is from a manager node, not in hosts.tab
7863:
7864: =item client
7865:
7866: the connection is from a non-manager in the hosts.tab
7867:
7868: =item both
7869:
7870: The connection is from a manager in the hosts.tab.
7871:
7872: =back
7873:
7874: =back
7875:
7876: =item (Blue) Certificates not installed -- trying insecure auth
7877:
7878: One of the certificate file, key file or
7879: certificate authority file could not be found for a client attempting
7880: SSL connection intiation. COnnection will be attemptied in in-secure mode.
7881: (this would be a system with an up to date lond that has not gotten a
7882: certificate from us).
7883:
7884: =item (Green) Successful local authentication
7885:
7886: A local connection successfully negotiated the encryption key.
7887: In this case the IDEA key is in a file (that is hopefully well protected).
7888:
7889: =item (Green) Successful ssl authentication with <client>
7890:
7891: The client (<client> is the peer's name in hosts.tab), has successfully
7892: negotiated an SSL connection with this child process.
7893:
7894: =item (Green) Successful insecure authentication with <client>
7895:
7896:
7897: The client has successfully negotiated an insecure connection withthe child process.
7898:
7899: =item (Yellow) Attempted insecure connection disallowed
7900:
7901: The client attempted and failed to successfully negotiate a successful insecure
7902: connection. This can happen either because the variable londAllowInsecure is false
7903: or undefined, or becuse the child did not successfully echo back the challenge
7904: string.
7905:
7906:
7907: =back
7908:
7909:
7910: =cut
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