Annotation of loncom/lond, revision 1.250
1.1 albertel 1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
1.60 www 4: #
1.250 ! albertel 5: # $Id: lond,v 1.249 2004/09/07 10:05:23 foxr 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/';
34: use LONCAPA::Configuration;
35:
1.1 albertel 36: use IO::Socket;
37: use IO::File;
1.126 albertel 38: #use Apache::File;
1.1 albertel 39: use Symbol;
40: use POSIX;
41: use Crypt::IDEA;
42: use LWP::UserAgent();
1.3 www 43: use GDBM_File;
44: use Authen::Krb4;
1.91 albertel 45: use Authen::Krb5;
1.49 albertel 46: use lib '/home/httpd/lib/perl/';
47: use localauth;
1.193 raeburn 48: use localenroll;
1.143 foxr 49: use File::Copy;
1.169 foxr 50: use LONCAPA::ConfigFileEdit;
1.200 matthew 51: use LONCAPA::lonlocal;
52: use LONCAPA::lonssl;
1.221 albertel 53: use Fcntl qw(:flock);
1.1 albertel 54:
1.239 foxr 55: my $DEBUG = 0; # Non zero to enable debug log entries.
1.77 foxr 56:
1.57 www 57: my $status='';
58: my $lastlog='';
59:
1.250 ! albertel 60: my $VERSION='$Revision: 1.249 $'; #' stupid emacs
1.121 albertel 61: my $remoteVERSION;
1.214 foxr 62: my $currenthostid="default";
1.115 albertel 63: my $currentdomainid;
1.134 albertel 64:
65: my $client;
1.200 matthew 66: my $clientip; # IP address of client.
67: my $clientdns; # DNS name of client.
68: my $clientname; # LonCAPA name of client.
1.140 foxr 69:
1.134 albertel 70: my $server;
1.200 matthew 71: my $thisserver; # DNS of us.
72:
73: my $keymode;
1.198 foxr 74:
1.207 foxr 75: my $cipher; # Cipher key negotiated with client
76: my $tmpsnum = 0; # Id of tmpputs.
77:
1.178 foxr 78: #
79: # Connection type is:
80: # client - All client actions are allowed
81: # manager - only management functions allowed.
82: # both - Both management and client actions are allowed
83: #
1.161 foxr 84:
1.178 foxr 85: my $ConnectionType;
1.161 foxr 86:
1.200 matthew 87: my %hostid; # ID's for hosts in cluster by ip.
88: my %hostdom; # LonCAPA domain for hosts in cluster.
89: my %hostip; # IPs for hosts in cluster.
90: my %hostdns; # ID's of hosts looked up by DNS name.
1.161 foxr 91:
1.178 foxr 92: my %managers; # Ip -> manager names
1.161 foxr 93:
1.178 foxr 94: my %perlvar; # Will have the apache conf defined perl vars.
1.134 albertel 95:
1.178 foxr 96: #
1.207 foxr 97: # The hash below is used for command dispatching, and is therefore keyed on the request keyword.
98: # Each element of the hash contains a reference to an array that contains:
99: # A reference to a sub that executes the request corresponding to the keyword.
100: # A flag that is true if the request must be encoded to be acceptable.
101: # A mask with bits as follows:
102: # CLIENT_OK - Set when the function is allowed by ordinary clients
103: # MANAGER_OK - Set when the function is allowed to manager clients.
104: #
105: my $CLIENT_OK = 1;
106: my $MANAGER_OK = 2;
107: my %Dispatcher;
108:
109:
110: #
1.178 foxr 111: # The array below are password error strings."
112: #
113: my $lastpwderror = 13; # Largest error number from lcpasswd.
114: my @passwderrors = ("ok",
115: "lcpasswd must be run as user 'www'",
116: "lcpasswd got incorrect number of arguments",
117: "lcpasswd did not get the right nubmer of input text lines",
118: "lcpasswd too many simultaneous pwd changes in progress",
119: "lcpasswd User does not exist.",
120: "lcpasswd Incorrect current passwd",
121: "lcpasswd Unable to su to root.",
122: "lcpasswd Cannot set new passwd.",
123: "lcpasswd Username has invalid characters",
124: "lcpasswd Invalid characters in password",
1.223 foxr 125: "lcpasswd User already exists",
126: "lcpasswd Something went wrong with user addition.",
127: "lcpasswd Password mismatch",
128: "lcpasswd Error filename is invalid");
1.97 foxr 129:
130:
1.178 foxr 131: # The array below are lcuseradd error strings.:
1.97 foxr 132:
1.178 foxr 133: my $lastadderror = 13;
134: my @adderrors = ("ok",
135: "User ID mismatch, lcuseradd must run as user www",
136: "lcuseradd Incorrect number of command line parameters must be 3",
137: "lcuseradd Incorrect number of stdinput lines, must be 3",
138: "lcuseradd Too many other simultaneous pwd changes in progress",
139: "lcuseradd User does not exist",
140: "lcuseradd Unable to make www member of users's group",
141: "lcuseradd Unable to su to root",
142: "lcuseradd Unable to set password",
143: "lcuseradd Usrname has invalid characters",
144: "lcuseradd Password has an invalid character",
145: "lcuseradd User already exists",
146: "lcuseradd Could not add user.",
147: "lcuseradd Password mismatch");
1.97 foxr 148:
1.96 foxr 149:
1.207 foxr 150:
151: #
152: # Statistics that are maintained and dislayed in the status line.
153: #
1.212 foxr 154: my $Transactions = 0; # Number of attempted transactions.
155: my $Failures = 0; # Number of transcations failed.
1.207 foxr 156:
157: # ResetStatistics:
158: # Resets the statistics counters:
159: #
160: sub ResetStatistics {
161: $Transactions = 0;
162: $Failures = 0;
163: }
164:
1.200 matthew 165: #------------------------------------------------------------------------
166: #
167: # LocalConnection
168: # Completes the formation of a locally authenticated connection.
169: # This function will ensure that the 'remote' client is really the
170: # local host. If not, the connection is closed, and the function fails.
171: # If so, initcmd is parsed for the name of a file containing the
172: # IDEA session key. The fie is opened, read, deleted and the session
173: # key returned to the caller.
174: #
175: # Parameters:
176: # $Socket - Socket open on client.
177: # $initcmd - The full text of the init command.
178: #
179: # Implicit inputs:
180: # $clientdns - The DNS name of the remote client.
181: # $thisserver - Our DNS name.
182: #
183: # Returns:
184: # IDEA session key on success.
185: # undef on failure.
186: #
187: sub LocalConnection {
188: my ($Socket, $initcmd) = @_;
189: Debug("Attempting local connection: $initcmd client: $clientdns me: $thisserver");
190: if($clientdns ne $thisserver) {
191: &logthis('<font color="red"> LocalConnection rejecting non local: '
192: ."$clientdns ne $thisserver </font>");
193: close $Socket;
194: return undef;
1.224 foxr 195: } else {
1.200 matthew 196: chomp($initcmd); # Get rid of \n in filename.
197: my ($init, $type, $name) = split(/:/, $initcmd);
198: Debug(" Init command: $init $type $name ");
199:
200: # Require that $init = init, and $type = local: Otherwise
201: # the caller is insane:
202:
203: if(($init ne "init") && ($type ne "local")) {
204: &logthis('<font color = "red"> LocalConnection: caller is insane! '
205: ."init = $init, and type = $type </font>");
206: close($Socket);;
207: return undef;
208:
209: }
210: # Now get the key filename:
211:
212: my $IDEAKey = lonlocal::ReadKeyFile($name);
213: return $IDEAKey;
214: }
215: }
216: #------------------------------------------------------------------------------
217: #
218: # SSLConnection
219: # Completes the formation of an ssh authenticated connection. The
220: # socket is promoted to an ssl socket. If this promotion and the associated
221: # certificate exchange are successful, the IDEA key is generated and sent
222: # to the remote peer via the SSL tunnel. The IDEA key is also returned to
223: # the caller after the SSL tunnel is torn down.
224: #
225: # Parameters:
226: # Name Type Purpose
227: # $Socket IO::Socket::INET Plaintext socket.
228: #
229: # Returns:
230: # IDEA key on success.
231: # undef on failure.
232: #
233: sub SSLConnection {
234: my $Socket = shift;
235:
236: Debug("SSLConnection: ");
237: my $KeyFile = lonssl::KeyFile();
238: if(!$KeyFile) {
239: my $err = lonssl::LastError();
240: &logthis("<font color=\"red\"> CRITICAL"
241: ."Can't get key file $err </font>");
242: return undef;
243: }
244: my ($CACertificate,
245: $Certificate) = lonssl::CertificateFile();
246:
247:
248: # If any of the key, certificate or certificate authority
249: # certificate filenames are not defined, this can't work.
250:
251: if((!$Certificate) || (!$CACertificate)) {
252: my $err = lonssl::LastError();
253: &logthis("<font color=\"red\"> CRITICAL"
254: ."Can't get certificates: $err </font>");
255:
256: return undef;
257: }
258: Debug("Key: $KeyFile CA: $CACertificate Cert: $Certificate");
259:
260: # Indicate to our peer that we can procede with
261: # a transition to ssl authentication:
262:
263: print $Socket "ok:ssl\n";
264:
265: Debug("Approving promotion -> ssl");
266: # And do so:
267:
268: my $SSLSocket = lonssl::PromoteServerSocket($Socket,
269: $CACertificate,
270: $Certificate,
271: $KeyFile);
272: if(! ($SSLSocket) ) { # SSL socket promotion failed.
273: my $err = lonssl::LastError();
274: &logthis("<font color=\"red\"> CRITICAL "
275: ."SSL Socket promotion failed: $err </font>");
276: return undef;
277: }
278: Debug("SSL Promotion successful");
279:
280: #
281: # The only thing we'll use the socket for is to send the IDEA key
282: # to the peer:
283:
284: my $Key = lonlocal::CreateCipherKey();
285: print $SSLSocket "$Key\n";
286:
287: lonssl::Close($SSLSocket);
288:
289: Debug("Key exchange complete: $Key");
290:
291: return $Key;
292: }
293: #
294: # InsecureConnection:
295: # If insecure connections are allowd,
296: # exchange a challenge with the client to 'validate' the
297: # client (not really, but that's the protocol):
298: # We produce a challenge string that's sent to the client.
299: # The client must then echo the challenge verbatim to us.
300: #
301: # Parameter:
302: # Socket - Socket open on the client.
303: # Returns:
304: # 1 - success.
305: # 0 - failure (e.g.mismatch or insecure not allowed).
306: #
307: sub InsecureConnection {
308: my $Socket = shift;
309:
310: # Don't even start if insecure connections are not allowed.
311:
312: if(! $perlvar{londAllowInsecure}) { # Insecure connections not allowed.
313: return 0;
314: }
315:
316: # Fabricate a challenge string and send it..
317:
318: my $challenge = "$$".time; # pid + time.
319: print $Socket "$challenge\n";
320: &status("Waiting for challenge reply");
321:
322: my $answer = <$Socket>;
323: $answer =~s/\W//g;
324: if($challenge eq $answer) {
325: return 1;
1.224 foxr 326: } else {
1.200 matthew 327: logthis("<font color='blue'>WARNING client did not respond to challenge</font>");
328: &status("No challenge reqply");
329: return 0;
330: }
331:
332:
333: }
334:
1.96 foxr 335: #
1.140 foxr 336: # GetCertificate: Given a transaction that requires a certificate,
337: # this function will extract the certificate from the transaction
338: # request. Note that at this point, the only concept of a certificate
339: # is the hostname to which we are connected.
340: #
341: # Parameter:
342: # request - The request sent by our client (this parameterization may
343: # need to change when we really use a certificate granting
344: # authority.
345: #
346: sub GetCertificate {
347: my $request = shift;
348:
349: return $clientip;
350: }
1.161 foxr 351:
1.178 foxr 352: #
353: # Return true if client is a manager.
354: #
355: sub isManager {
356: return (($ConnectionType eq "manager") || ($ConnectionType eq "both"));
357: }
358: #
359: # Return tru if client can do client functions
360: #
361: sub isClient {
362: return (($ConnectionType eq "client") || ($ConnectionType eq "both"));
363: }
1.161 foxr 364:
365:
1.156 foxr 366: #
367: # ReadManagerTable: Reads in the current manager table. For now this is
368: # done on each manager authentication because:
369: # - These authentications are not frequent
370: # - This allows dynamic changes to the manager table
371: # without the need to signal to the lond.
372: #
373: sub ReadManagerTable {
374:
375: # Clean out the old table first..
376:
1.166 foxr 377: foreach my $key (keys %managers) {
378: delete $managers{$key};
379: }
380:
381: my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
382: if (!open (MANAGERS, $tablename)) {
383: logthis('<font color="red">No manager table. Nobody can manage!!</font>');
384: return;
385: }
386: while(my $host = <MANAGERS>) {
387: chomp($host);
388: if ($host =~ "^#") { # Comment line.
389: next;
390: }
391: if (!defined $hostip{$host}) { # This is a non cluster member
1.161 foxr 392: # The entry is of the form:
393: # cluname:hostname
394: # cluname - A 'cluster hostname' is needed in order to negotiate
395: # the host key.
396: # hostname- The dns name of the host.
397: #
1.166 foxr 398: my($cluname, $dnsname) = split(/:/, $host);
399:
400: my $ip = gethostbyname($dnsname);
401: if(defined($ip)) { # bad names don't deserve entry.
402: my $hostip = inet_ntoa($ip);
403: $managers{$hostip} = $cluname;
404: logthis('<font color="green"> registering manager '.
405: "$dnsname as $cluname with $hostip </font>\n");
406: }
407: } else {
408: logthis('<font color="green"> existing host'." $host</font>\n");
409: $managers{$hostip{$host}} = $host; # Use info from cluster tab if clumemeber
410: }
411: }
1.156 foxr 412: }
1.140 foxr 413:
414: #
415: # ValidManager: Determines if a given certificate represents a valid manager.
416: # in this primitive implementation, the 'certificate' is
417: # just the connecting loncapa client name. This is checked
418: # against a valid client list in the configuration.
419: #
420: #
421: sub ValidManager {
422: my $certificate = shift;
423:
1.163 foxr 424: return isManager;
1.140 foxr 425: }
426: #
1.143 foxr 427: # CopyFile: Called as part of the process of installing a
428: # new configuration file. This function copies an existing
429: # file to a backup file.
430: # Parameters:
431: # oldfile - Name of the file to backup.
432: # newfile - Name of the backup file.
433: # Return:
434: # 0 - Failure (errno has failure reason).
435: # 1 - Success.
436: #
437: sub CopyFile {
1.192 foxr 438:
439: my ($oldfile, $newfile) = @_;
1.143 foxr 440:
441: # The file must exist:
442:
443: if(-e $oldfile) {
444:
445: # Read the old file.
446:
447: my $oldfh = IO::File->new("< $oldfile");
448: if(!$oldfh) {
449: return 0;
450: }
451: my @contents = <$oldfh>; # Suck in the entire file.
452:
453: # write the backup file:
454:
455: my $newfh = IO::File->new("> $newfile");
456: if(!(defined $newfh)){
457: return 0;
458: }
459: my $lines = scalar @contents;
460: for (my $i =0; $i < $lines; $i++) {
461: print $newfh ($contents[$i]);
462: }
463:
464: $oldfh->close;
465: $newfh->close;
466:
467: chmod(0660, $newfile);
468:
469: return 1;
470:
471: } else {
472: return 0;
473: }
474: }
1.157 foxr 475: #
476: # Host files are passed out with externally visible host IPs.
477: # If, for example, we are behind a fire-wall or NAT host, our
478: # internally visible IP may be different than the externally
479: # visible IP. Therefore, we always adjust the contents of the
480: # host file so that the entry for ME is the IP that we believe
481: # we have. At present, this is defined as the entry that
482: # DNS has for us. If by some chance we are not able to get a
483: # DNS translation for us, then we assume that the host.tab file
484: # is correct.
485: # BUGBUGBUG - in the future, we really should see if we can
486: # easily query the interface(s) instead.
487: # Parameter(s):
488: # contents - The contents of the host.tab to check.
489: # Returns:
490: # newcontents - The adjusted contents.
491: #
492: #
493: sub AdjustHostContents {
494: my $contents = shift;
495: my $adjusted;
496: my $me = $perlvar{'lonHostID'};
497:
1.166 foxr 498: foreach my $line (split(/\n/,$contents)) {
1.157 foxr 499: if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/))) {
500: chomp($line);
501: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
502: if ($id eq $me) {
1.166 foxr 503: my $ip = gethostbyname($name);
504: my $ipnew = inet_ntoa($ip);
505: $ip = $ipnew;
1.157 foxr 506: # Reconstruct the host line and append to adjusted:
507:
1.166 foxr 508: my $newline = "$id:$domain:$role:$name:$ip";
509: if($maxcon ne "") { # Not all hosts have loncnew tuning params
510: $newline .= ":$maxcon:$idleto:$mincon";
511: }
512: $adjusted .= $newline."\n";
1.157 foxr 513:
1.166 foxr 514: } else { # Not me, pass unmodified.
515: $adjusted .= $line."\n";
516: }
1.157 foxr 517: } else { # Blank or comment never re-written.
518: $adjusted .= $line."\n"; # Pass blanks and comments as is.
519: }
1.166 foxr 520: }
521: return $adjusted;
1.157 foxr 522: }
1.143 foxr 523: #
524: # InstallFile: Called to install an administrative file:
525: # - The file is created with <name>.tmp
526: # - The <name>.tmp file is then mv'd to <name>
527: # This lugubrious procedure is done to ensure that we are never without
528: # a valid, even if dated, version of the file regardless of who crashes
529: # and when the crash occurs.
530: #
531: # Parameters:
532: # Name of the file
533: # File Contents.
534: # Return:
535: # nonzero - success.
536: # 0 - failure and $! has an errno.
537: #
538: sub InstallFile {
1.192 foxr 539:
540: my ($Filename, $Contents) = @_;
1.143 foxr 541: my $TempFile = $Filename.".tmp";
542:
543: # Open the file for write:
544:
545: my $fh = IO::File->new("> $TempFile"); # Write to temp.
546: if(!(defined $fh)) {
547: &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
548: return 0;
549: }
550: # write the contents of the file:
551:
552: print $fh ($Contents);
553: $fh->close; # In case we ever have a filesystem w. locking
554:
555: chmod(0660, $TempFile);
556:
557: # Now we can move install the file in position.
558:
559: move($TempFile, $Filename);
560:
561: return 1;
562: }
1.200 matthew 563:
564:
1.169 foxr 565: #
566: # ConfigFileFromSelector: converts a configuration file selector
567: # (one of host or domain at this point) into a
568: # configuration file pathname.
569: #
570: # Parameters:
571: # selector - Configuration file selector.
572: # Returns:
573: # Full path to the file or undef if the selector is invalid.
574: #
575: sub ConfigFileFromSelector {
576: my $selector = shift;
577: my $tablefile;
578:
579: my $tabledir = $perlvar{'lonTabDir'}.'/';
580: if ($selector eq "hosts") {
581: $tablefile = $tabledir."hosts.tab";
582: } elsif ($selector eq "domain") {
583: $tablefile = $tabledir."domain.tab";
584: } else {
585: return undef;
586: }
587: return $tablefile;
1.143 foxr 588:
1.169 foxr 589: }
1.143 foxr 590: #
1.141 foxr 591: # PushFile: Called to do an administrative push of a file.
592: # - Ensure the file being pushed is one we support.
593: # - Backup the old file to <filename.saved>
594: # - Separate the contents of the new file out from the
595: # rest of the request.
596: # - Write the new file.
597: # Parameter:
598: # Request - The entire user request. This consists of a : separated
599: # string pushfile:tablename:contents.
600: # NOTE: The contents may have :'s in it as well making things a bit
601: # more interesting... but not much.
602: # Returns:
603: # String to send to client ("ok" or "refused" if bad file).
604: #
605: sub PushFile {
606: my $request = shift;
607: my ($command, $filename, $contents) = split(":", $request, 3);
608:
609: # At this point in time, pushes for only the following tables are
610: # supported:
611: # hosts.tab ($filename eq host).
612: # domain.tab ($filename eq domain).
613: # Construct the destination filename or reject the request.
614: #
615: # lonManage is supposed to ensure this, however this session could be
616: # part of some elaborate spoof that managed somehow to authenticate.
617: #
618:
1.169 foxr 619:
620: my $tablefile = ConfigFileFromSelector($filename);
621: if(! (defined $tablefile)) {
1.141 foxr 622: return "refused";
623: }
624: #
625: # >copy< the old table to the backup table
626: # don't rename in case system crashes/reboots etc. in the time
627: # window between a rename and write.
628: #
629: my $backupfile = $tablefile;
630: $backupfile =~ s/\.tab$/.old/;
1.143 foxr 631: if(!CopyFile($tablefile, $backupfile)) {
632: &logthis('<font color="green"> CopyFile from '.$tablefile." to ".$backupfile." failed </font>");
633: return "error:$!";
634: }
1.141 foxr 635: &logthis('<font color="green"> Pushfile: backed up '
636: .$tablefile." to $backupfile</font>");
637:
1.157 foxr 638: # If the file being pushed is the host file, we adjust the entry for ourself so that the
639: # IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible
640: # to conceive of conditions where we don't have a DNS entry locally. This is possible in a
641: # network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
642: # that possibilty.
643:
644: if($filename eq "host") {
645: $contents = AdjustHostContents($contents);
646: }
647:
1.141 foxr 648: # Install the new file:
649:
1.143 foxr 650: if(!InstallFile($tablefile, $contents)) {
651: &logthis('<font color="red"> Pushfile: unable to install '
1.145 foxr 652: .$tablefile." $! </font>");
1.143 foxr 653: return "error:$!";
1.224 foxr 654: } else {
1.143 foxr 655: &logthis('<font color="green"> Installed new '.$tablefile
656: ."</font>");
657:
658: }
659:
1.141 foxr 660:
661: # Indicate success:
662:
663: return "ok";
664:
665: }
1.145 foxr 666:
667: #
668: # Called to re-init either lonc or lond.
669: #
670: # Parameters:
671: # request - The full request by the client. This is of the form
672: # reinit:<process>
673: # where <process> is allowed to be either of
674: # lonc or lond
675: #
676: # Returns:
677: # The string to be sent back to the client either:
678: # ok - Everything worked just fine.
679: # error:why - There was a failure and why describes the reason.
680: #
681: #
682: sub ReinitProcess {
683: my $request = shift;
684:
1.146 foxr 685:
686: # separate the request (reinit) from the process identifier and
687: # validate it producing the name of the .pid file for the process.
688: #
689: #
690: my ($junk, $process) = split(":", $request);
1.147 foxr 691: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
1.146 foxr 692: if($process eq 'lonc') {
693: $processpidfile = $processpidfile."lonc.pid";
1.147 foxr 694: if (!open(PIDFILE, "< $processpidfile")) {
695: return "error:Open failed for $processpidfile";
696: }
697: my $loncpid = <PIDFILE>;
698: close(PIDFILE);
699: logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
700: ."</font>");
701: kill("USR2", $loncpid);
1.146 foxr 702: } elsif ($process eq 'lond') {
1.147 foxr 703: logthis('<font color="red"> Reinitializing self (lond) </font>');
704: &UpdateHosts; # Lond is us!!
1.146 foxr 705: } else {
706: &logthis('<font color="yellow" Invalid reinit request for '.$process
707: ."</font>");
708: return "error:Invalid process identifier $process";
709: }
1.145 foxr 710: return 'ok';
711: }
1.168 foxr 712: # Validate a line in a configuration file edit script:
713: # Validation includes:
714: # - Ensuring the command is valid.
715: # - Ensuring the command has sufficient parameters
716: # Parameters:
717: # scriptline - A line to validate (\n has been stripped for what it's worth).
1.167 foxr 718: #
1.168 foxr 719: # Return:
720: # 0 - Invalid scriptline.
721: # 1 - Valid scriptline
722: # NOTE:
723: # Only the command syntax is checked, not the executability of the
724: # command.
725: #
726: sub isValidEditCommand {
727: my $scriptline = shift;
728:
729: # Line elements are pipe separated:
730:
731: my ($command, $key, $newline) = split(/\|/, $scriptline);
732: &logthis('<font color="green"> isValideditCommand checking: '.
733: "Command = '$command', Key = '$key', Newline = '$newline' </font>\n");
734:
735: if ($command eq "delete") {
736: #
737: # key with no newline.
738: #
739: if( ($key eq "") || ($newline ne "")) {
740: return 0; # Must have key but no newline.
741: } else {
742: return 1; # Valid syntax.
743: }
1.169 foxr 744: } elsif ($command eq "replace") {
1.168 foxr 745: #
746: # key and newline:
747: #
748: if (($key eq "") || ($newline eq "")) {
749: return 0;
750: } else {
751: return 1;
752: }
1.169 foxr 753: } elsif ($command eq "append") {
754: if (($key ne "") && ($newline eq "")) {
755: return 1;
756: } else {
757: return 0;
758: }
1.168 foxr 759: } else {
760: return 0; # Invalid command.
761: }
762: return 0; # Should not get here!!!
763: }
1.169 foxr 764: #
765: # ApplyEdit - Applies an edit command to a line in a configuration
766: # file. It is the caller's responsiblity to validate the
767: # edit line.
768: # Parameters:
769: # $directive - A single edit directive to apply.
770: # Edit directives are of the form:
771: # append|newline - Appends a new line to the file.
772: # replace|key|newline - Replaces the line with key value 'key'
773: # delete|key - Deletes the line with key value 'key'.
774: # $editor - A config file editor object that contains the
775: # file being edited.
776: #
777: sub ApplyEdit {
1.192 foxr 778:
779: my ($directive, $editor) = @_;
1.169 foxr 780:
781: # Break the directive down into its command and its parameters
782: # (at most two at this point. The meaning of the parameters, if in fact
783: # they exist depends on the command).
784:
785: my ($command, $p1, $p2) = split(/\|/, $directive);
786:
787: if($command eq "append") {
788: $editor->Append($p1); # p1 - key p2 null.
789: } elsif ($command eq "replace") {
790: $editor->ReplaceLine($p1, $p2); # p1 - key p2 = newline.
791: } elsif ($command eq "delete") {
792: $editor->DeleteLine($p1); # p1 - key p2 null.
793: } else { # Should not get here!!!
794: die "Invalid command given to ApplyEdit $command"
795: }
796: }
797: #
798: # AdjustOurHost:
799: # Adjusts a host file stored in a configuration file editor object
800: # for the true IP address of this host. This is necessary for hosts
801: # that live behind a firewall.
802: # Those hosts have a publicly distributed IP of the firewall, but
803: # internally must use their actual IP. We assume that a given
804: # host only has a single IP interface for now.
805: # Formal Parameters:
806: # editor - The configuration file editor to adjust. This
807: # editor is assumed to contain a hosts.tab file.
808: # Strategy:
809: # - Figure out our hostname.
810: # - Lookup the entry for this host.
811: # - Modify the line to contain our IP
812: # - Do a replace for this host.
813: sub AdjustOurHost {
814: my $editor = shift;
815:
816: # figure out who I am.
817:
818: my $myHostName = $perlvar{'lonHostID'}; # LonCAPA hostname.
819:
820: # Get my host file entry.
821:
822: my $ConfigLine = $editor->Find($myHostName);
823: if(! (defined $ConfigLine)) {
824: die "AdjustOurHost - no entry for me in hosts file $myHostName";
825: }
826: # figure out my IP:
827: # Use the config line to get my hostname.
828: # Use gethostbyname to translate that into an IP address.
829: #
830: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);
831: my $BinaryIp = gethostbyname($name);
832: my $ip = inet_ntoa($ip);
833: #
834: # Reassemble the config line from the elements in the list.
835: # Note that if the loncnew items were not present before, they will
836: # be now even if they would be empty
837: #
838: my $newConfigLine = $id;
839: foreach my $item ($domain, $role, $name, $ip, $maxcon, $idleto, $mincon) {
840: $newConfigLine .= ":".$item;
841: }
842: # Replace the line:
843:
844: $editor->ReplaceLine($id, $newConfigLine);
845:
846: }
847: #
848: # ReplaceConfigFile:
849: # Replaces a configuration file with the contents of a
850: # configuration file editor object.
851: # This is done by:
852: # - Copying the target file to <filename>.old
853: # - Writing the new file to <filename>.tmp
854: # - Moving <filename.tmp> -> <filename>
855: # This laborious process ensures that the system is never without
856: # a configuration file that's at least valid (even if the contents
857: # may be dated).
858: # Parameters:
859: # filename - Name of the file to modify... this is a full path.
860: # editor - Editor containing the file.
861: #
862: sub ReplaceConfigFile {
1.192 foxr 863:
864: my ($filename, $editor) = @_;
1.168 foxr 865:
1.169 foxr 866: CopyFile ($filename, $filename.".old");
867:
868: my $contents = $editor->Get(); # Get the contents of the file.
869:
870: InstallFile($filename, $contents);
871: }
1.168 foxr 872: #
873: #
874: # Called to edit a configuration table file
1.167 foxr 875: # Parameters:
876: # request - The entire command/request sent by lonc or lonManage
877: # Return:
878: # The reply to send to the client.
1.168 foxr 879: #
1.167 foxr 880: sub EditFile {
881: my $request = shift;
882:
883: # Split the command into it's pieces: edit:filetype:script
884:
1.168 foxr 885: my ($request, $filetype, $script) = split(/:/, $request,3); # : in script
1.167 foxr 886:
887: # Check the pre-coditions for success:
888:
889: if($request != "edit") { # Something is amiss afoot alack.
890: return "error:edit request detected, but request != 'edit'\n";
891: }
892: if( ($filetype ne "hosts") &&
893: ($filetype ne "domain")) {
894: return "error:edit requested with invalid file specifier: $filetype \n";
895: }
896:
897: # Split the edit script and check it's validity.
1.168 foxr 898:
899: my @scriptlines = split(/\n/, $script); # one line per element.
900: my $linecount = scalar(@scriptlines);
901: for(my $i = 0; $i < $linecount; $i++) {
902: chomp($scriptlines[$i]);
903: if(!isValidEditCommand($scriptlines[$i])) {
904: return "error:edit with bad script line: '$scriptlines[$i]' \n";
905: }
906: }
1.145 foxr 907:
1.167 foxr 908: # Execute the edit operation.
1.169 foxr 909: # - Create a config file editor for the appropriate file and
910: # - execute each command in the script:
911: #
912: my $configfile = ConfigFileFromSelector($filetype);
913: if (!(defined $configfile)) {
914: return "refused\n";
915: }
916: my $editor = ConfigFileEdit->new($configfile);
1.167 foxr 917:
1.169 foxr 918: for (my $i = 0; $i < $linecount; $i++) {
919: ApplyEdit($scriptlines[$i], $editor);
920: }
921: # If the file is the host file, ensure that our host is
922: # adjusted to have our ip:
923: #
924: if($filetype eq "host") {
925: AdjustOurHost($editor);
926: }
927: # Finally replace the current file with our file.
928: #
929: ReplaceConfigFile($configfile, $editor);
1.167 foxr 930:
931: return "ok\n";
932: }
1.207 foxr 933:
934: #---------------------------------------------------------------
935: #
936: # Manipulation of hash based databases (factoring out common code
937: # for later use as we refactor.
938: #
939: # Ties a domain level resource file to a hash.
940: # If requested a history entry is created in the associated hist file.
941: #
942: # Parameters:
943: # domain - Name of the domain in which the resource file lives.
944: # namespace - Name of the hash within that domain.
945: # how - How to tie the hash (e.g. GDBM_WRCREAT()).
946: # loghead - Optional parameter, if present a log entry is created
947: # in the associated history file and this is the first part
948: # of that entry.
949: # logtail - Goes along with loghead, The actual logentry is of the
950: # form $loghead:<timestamp>:logtail.
951: # Returns:
952: # Reference to a hash bound to the db file or alternatively undef
953: # if the tie failed.
954: #
1.209 albertel 955: sub tie_domain_hash {
1.210 albertel 956: my ($domain,$namespace,$how,$loghead,$logtail) = @_;
1.207 foxr 957:
958: # Filter out any whitespace in the domain name:
959:
960: $domain =~ s/\W//g;
961:
962: # We have enough to go on to tie the hash:
963:
964: my $user_top_dir = $perlvar{'lonUsersDir'};
965: my $domain_dir = $user_top_dir."/$domain";
966: my $resource_file = $domain_dir."/$namespace.db";
967: my %hash;
968: if(tie(%hash, 'GDBM_File', $resource_file, $how, 0640)) {
1.211 albertel 969: if (defined($loghead)) { # Need to log the operation.
1.210 albertel 970: my $logFh = IO::File->new(">>$domain_dir/$namespace.hist");
1.207 foxr 971: if($logFh) {
972: my $timestamp = time;
973: print $logFh "$loghead:$timestamp:$logtail\n";
974: }
1.210 albertel 975: $logFh->close;
1.207 foxr 976: }
977: return \%hash; # Return the tied hash.
1.210 albertel 978: } else {
1.207 foxr 979: return undef; # Tie failed.
980: }
981: }
982:
983: #
984: # Ties a user's resource file to a hash.
985: # If necessary, an appropriate history
986: # log file entry is made as well.
987: # This sub factors out common code from the subs that manipulate
988: # the various gdbm files that keep keyword value pairs.
989: # Parameters:
990: # domain - Name of the domain the user is in.
991: # user - Name of the 'current user'.
992: # namespace - Namespace representing the file to tie.
993: # how - What the tie is done to (e.g. GDBM_WRCREAT().
994: # loghead - Optional first part of log entry if there may be a
995: # history file.
996: # what - Optional tail of log entry if there may be a history
997: # file.
998: # Returns:
999: # hash to which the database is tied. It's up to the caller to untie.
1000: # undef if the has could not be tied.
1001: #
1.210 albertel 1002: sub tie_user_hash {
1003: my ($domain,$user,$namespace,$how,$loghead,$what) = @_;
1.207 foxr 1004:
1005: $namespace=~s/\//\_/g; # / -> _
1006: $namespace=~s/\W//g; # whitespace eliminated.
1007: my $proname = propath($domain, $user);
1008:
1009: # Tie the database.
1010:
1011: my %hash;
1012: if(tie(%hash, 'GDBM_File', "$proname/$namespace.db",
1013: $how, 0640)) {
1.209 albertel 1014: # If this is a namespace for which a history is kept,
1015: # make the history log entry:
1.211 albertel 1016: if (($namespace =~/^nohist\_/) && (defined($loghead))) {
1.209 albertel 1017: my $args = scalar @_;
1018: Debug(" Opening history: $namespace $args");
1019: my $hfh = IO::File->new(">>$proname/$namespace.hist");
1020: if($hfh) {
1021: my $now = time;
1022: print $hfh "$loghead:$now:$what\n";
1023: }
1.210 albertel 1024: $hfh->close;
1.209 albertel 1025: }
1.207 foxr 1026: return \%hash;
1.209 albertel 1027: } else {
1.207 foxr 1028: return undef;
1029: }
1030:
1031: }
1.214 foxr 1032:
1033: #--------------------- Request Handlers --------------------------------------------
1034: #
1.215 foxr 1035: # By convention each request handler registers itself prior to the sub
1036: # declaration:
1.214 foxr 1037: #
1038:
1.216 foxr 1039: #++
1040: #
1.214 foxr 1041: # Handles ping requests.
1042: # Parameters:
1043: # $cmd - the actual keyword that invoked us.
1044: # $tail - the tail of the request that invoked us.
1045: # $replyfd- File descriptor connected to the client
1046: # Implicit Inputs:
1047: # $currenthostid - Global variable that carries the name of the host we are
1048: # known as.
1049: # Returns:
1050: # 1 - Ok to continue processing.
1051: # 0 - Program should exit.
1052: # Side effects:
1053: # Reply information is sent to the client.
1054:
1055: sub ping_handler {
1056: my ($cmd, $tail, $client) = @_;
1057: Debug("$cmd $tail $client .. $currenthostid:");
1058:
1059: Reply( $client,"$currenthostid\n","$cmd:$tail");
1060:
1061: return 1;
1062: }
1063: ®ister_handler("ping", \&ping_handler, 0, 1, 1); # Ping unencoded, client or manager.
1064:
1.216 foxr 1065: #++
1.215 foxr 1066: #
1067: # Handles pong requests. Pong replies with our current host id, and
1068: # the results of a ping sent to us via our lonc.
1069: #
1070: # Parameters:
1071: # $cmd - the actual keyword that invoked us.
1072: # $tail - the tail of the request that invoked us.
1073: # $replyfd- File descriptor connected to the client
1074: # Implicit Inputs:
1075: # $currenthostid - Global variable that carries the name of the host we are
1076: # connected to.
1077: # Returns:
1078: # 1 - Ok to continue processing.
1079: # 0 - Program should exit.
1080: # Side effects:
1081: # Reply information is sent to the client.
1082:
1083: sub pong_handler {
1084: my ($cmd, $tail, $replyfd) = @_;
1085:
1086: my $reply=&reply("ping",$clientname);
1087: &Reply( $replyfd, "$currenthostid:$reply\n", "$cmd:$tail");
1088: return 1;
1089: }
1090: ®ister_handler("pong", \&pong_handler, 0, 1, 1); # Pong unencoded, client or manager
1091:
1.216 foxr 1092: #++
1093: # Called to establish an encrypted session key with the remote client.
1094: # Note that with secure lond, in most cases this function is never
1095: # invoked. Instead, the secure session key is established either
1096: # via a local file that's locked down tight and only lives for a short
1097: # time, or via an ssl tunnel...and is generated from a bunch-o-random
1098: # bits from /dev/urandom, rather than the predictable pattern used by
1099: # by this sub. This sub is only used in the old-style insecure
1100: # key negotiation.
1101: # Parameters:
1102: # $cmd - the actual keyword that invoked us.
1103: # $tail - the tail of the request that invoked us.
1104: # $replyfd- File descriptor connected to the client
1105: # Implicit Inputs:
1106: # $currenthostid - Global variable that carries the name of the host
1107: # known as.
1108: # $clientname - Global variable that carries the name of the hsot we're connected to.
1109: # Returns:
1110: # 1 - Ok to continue processing.
1111: # 0 - Program should exit.
1112: # Implicit Outputs:
1113: # Reply information is sent to the client.
1114: # $cipher is set with a reference to a new IDEA encryption object.
1115: #
1116: sub establish_key_handler {
1117: my ($cmd, $tail, $replyfd) = @_;
1118:
1119: my $buildkey=time.$$.int(rand 100000);
1120: $buildkey=~tr/1-6/A-F/;
1121: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
1122: my $key=$currenthostid.$clientname;
1123: $key=~tr/a-z/A-Z/;
1124: $key=~tr/G-P/0-9/;
1125: $key=~tr/Q-Z/0-9/;
1126: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
1127: $key=substr($key,0,32);
1128: my $cipherkey=pack("H32",$key);
1129: $cipher=new IDEA $cipherkey;
1130: &Reply($replyfd, "$buildkey\n", "$cmd:$tail");
1131:
1132: return 1;
1133:
1134: }
1135: ®ister_handler("ekey", \&establish_key_handler, 0, 1,1);
1136:
1.215 foxr 1137:
1.217 foxr 1138: # Handler for the load command. Returns the current system load average
1139: # to the requestor.
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: # $clientname - Global variable that carries the name of the hsot we're connected to.
1149: # Returns:
1150: # 1 - Ok to continue processing.
1151: # 0 - Program should exit.
1152: # Side effects:
1153: # Reply information is sent to the client.
1154: sub load_handler {
1155: my ($cmd, $tail, $replyfd) = @_;
1156:
1157: # Get the load average from /proc/loadavg and calculate it as a percentage of
1158: # the allowed load limit as set by the perl global variable lonLoadLim
1159:
1160: my $loadavg;
1161: my $loadfile=IO::File->new('/proc/loadavg');
1162:
1163: $loadavg=<$loadfile>;
1164: $loadavg =~ s/\s.*//g; # Extract the first field only.
1165:
1166: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1167:
1168: &Reply( $replyfd, "$loadpercent\n", "$cmd:$tail");
1169:
1170: return 1;
1171: }
1172: register_handler("load", \&load_handler, 0, 1, 0);
1173:
1174: #
1175: # Process the userload request. This sub returns to the client the current
1176: # user load average. It can be invoked either by clients or managers.
1177: #
1178: # Parameters:
1179: # $cmd - the actual keyword that invoked us.
1180: # $tail - the tail of the request that invoked us.
1181: # $replyfd- File descriptor connected to the client
1182: # Implicit Inputs:
1183: # $currenthostid - Global variable that carries the name of the host
1184: # known as.
1185: # $clientname - Global variable that carries the name of the hsot we're connected to.
1186: # Returns:
1187: # 1 - Ok to continue processing.
1188: # 0 - Program should exit
1189: # Implicit inputs:
1190: # whatever the userload() function requires.
1191: # Implicit outputs:
1192: # the reply is written to the client.
1193: #
1194: sub user_load_handler {
1195: my ($cmd, $tail, $replyfd) = @_;
1196:
1197: my $userloadpercent=&userload();
1198: &Reply($replyfd, "$userloadpercent\n", "$cmd:$tail");
1199:
1200: return 1;
1201: }
1202: register_handler("userload", \&user_load_handler, 0, 1, 0);
1203:
1.218 foxr 1204: # Process a request for the authorization type of a user:
1205: # (userauth).
1206: #
1207: # Parameters:
1208: # $cmd - the actual keyword that invoked us.
1209: # $tail - the tail of the request that invoked us.
1210: # $replyfd- File descriptor connected to the client
1211: # Returns:
1212: # 1 - Ok to continue processing.
1213: # 0 - Program should exit
1214: # Implicit outputs:
1215: # The user authorization type is written to the client.
1216: #
1217: sub user_authorization_type {
1218: my ($cmd, $tail, $replyfd) = @_;
1219:
1220: my $userinput = "$cmd:$tail";
1221:
1222: # Pull the domain and username out of the command tail.
1.222 foxr 1223: # and call get_auth_type to determine the authentication type.
1.218 foxr 1224:
1225: my ($udom,$uname)=split(/:/,$tail);
1.222 foxr 1226: my $result = &get_auth_type($udom, $uname);
1.218 foxr 1227: if($result eq "nouser") {
1228: &Failure( $replyfd, "unknown_user\n", $userinput);
1229: } else {
1230: #
1.222 foxr 1231: # We only want to pass the second field from get_auth_type
1.218 foxr 1232: # for ^krb.. otherwise we'll be handing out the encrypted
1233: # password for internals e.g.
1234: #
1235: my ($type,$otherinfo) = split(/:/,$result);
1236: if($type =~ /^krb/) {
1237: $type = $result;
1238: }
1.222 foxr 1239: &Reply( $replyfd, "$type:\n", $userinput);
1.218 foxr 1240: }
1241:
1242: return 1;
1243: }
1244: ®ister_handler("currentauth", \&user_authorization_type, 1, 1, 0);
1245:
1246: # Process a request by a manager to push a hosts or domain table
1247: # to us. We pick apart the command and pass it on to the subs
1248: # that already exist to do this.
1249: #
1250: # Parameters:
1251: # $cmd - the actual keyword that invoked us.
1252: # $tail - the tail of the request that invoked us.
1253: # $client - File descriptor connected to the client
1254: # Returns:
1255: # 1 - Ok to continue processing.
1256: # 0 - Program should exit
1257: # Implicit Output:
1258: # a reply is written to the client.
1259:
1260: sub push_file_handler {
1261: my ($cmd, $tail, $client) = @_;
1262:
1263: my $userinput = "$cmd:$tail";
1264:
1265: # At this time we only know that the IP of our partner is a valid manager
1266: # the code below is a hook to do further authentication (e.g. to resolve
1267: # spoofing).
1268:
1269: my $cert = &GetCertificate($userinput);
1270: if(&ValidManager($cert)) {
1271:
1272: # Now presumably we have the bona fides of both the peer host and the
1273: # process making the request.
1274:
1275: my $reply = &PushFile($userinput);
1276: &Reply($client, "$reply\n", $userinput);
1277:
1278: } else {
1279: &Failure( $client, "refused\n", $userinput);
1280: }
1.219 foxr 1281: return 1;
1.218 foxr 1282: }
1283: ®ister_handler("pushfile", \&push_file_handler, 1, 0, 1);
1284:
1.243 banghart 1285: #
1286: # du - list the disk usuage of a directory recursively.
1287: #
1288: # note: stolen code from the ls file handler
1289: # under construction by Rick Banghart
1290: # .
1291: # Parameters:
1292: # $cmd - The command that dispatched us (du).
1293: # $ududir - The directory path to list... I'm not sure what this
1294: # is relative as things like ls:. return e.g.
1295: # no_such_dir.
1296: # $client - Socket open on the client.
1297: # Returns:
1298: # 1 - indicating that the daemon should not disconnect.
1299: # Side Effects:
1300: # The reply is written to $client.
1301: #
1.244 banghart 1302:
1.243 banghart 1303: sub du_handler {
1304: my ($cmd, $ududir, $client) = @_;
1.245 albertel 1305: if ($ududir=~/\.\./ || $ududir!~m|^/home/httpd/|) {
1306: &Failure($client,"refused\n","$cmd:$ududir");
1307: return 1;
1308: }
1.249 foxr 1309: # Since $ududir could have some nasties in it,
1310: # we will require that ududir is a valid
1311: # directory. Just in case someone tries to
1312: # slip us a line like .;(cd /home/httpd rm -rf*)
1313: # etc.
1314: #
1315: if (-d $ududir) {
1316: # And as Shakespeare would say to make
1317: # assurance double sure, quote the $ududir
1318: # This is in case someone manages to first
1319: # e.g. fabricate a valid directory with a ';'
1320: # in it. Quoting the dir will help
1321: # keep $ududir completely interpreted as a
1322: # directory.
1323: #
1324: my $duout = `du -ks "$ududir" 2>/dev/null`;
1325: $duout=~s/[^\d]//g; #preserve only the numbers
1326: &Reply($client,"$duout\n","$cmd:$ududir");
1327: } else {
1.250 ! albertel 1328: &Failure($client, "bad_directory:$ududir","$cmd:$ududir");
1.249 foxr 1329: }
1.243 banghart 1330: return 1;
1331: }
1332: ®ister_handler("du", \&du_handler, 0, 1, 0);
1.218 foxr 1333:
1334:
1.239 foxr 1335: #
1336: # ls - list the contents of a directory. For each file in the
1337: # selected directory the filename followed by the full output of
1338: # the stat function is returned. The returned info for each
1339: # file are separated by ':'. The stat fields are separated by &'s.
1340: # Parameters:
1341: # $cmd - The command that dispatched us (ls).
1342: # $ulsdir - The directory path to list... I'm not sure what this
1343: # is relative as things like ls:. return e.g.
1344: # no_such_dir.
1345: # $client - Socket open on the client.
1346: # Returns:
1347: # 1 - indicating that the daemon should not disconnect.
1348: # Side Effects:
1349: # The reply is written to $client.
1350: #
1351: sub ls_handler {
1352: my ($cmd, $ulsdir, $client) = @_;
1353:
1354: my $userinput = "$cmd:$ulsdir";
1355:
1356: my $obs;
1357: my $rights;
1358: my $ulsout='';
1359: my $ulsfn;
1360: if (-e $ulsdir) {
1361: if(-d $ulsdir) {
1362: if (opendir(LSDIR,$ulsdir)) {
1363: while ($ulsfn=readdir(LSDIR)) {
1364: undef $obs, $rights;
1365: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1366: #We do some obsolete checking here
1367: if(-e $ulsdir.'/'.$ulsfn.".meta") {
1368: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
1369: my @obsolete=<FILE>;
1370: foreach my $obsolete (@obsolete) {
1371: if($obsolete =~ m|(<obsolete>)(on)|) { $obs = 1; }
1372: if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
1373: }
1374: }
1375: $ulsout.=$ulsfn.'&'.join('&',@ulsstats);
1376: if($obs eq '1') { $ulsout.="&1"; }
1377: else { $ulsout.="&0"; }
1378: if($rights eq '1') { $ulsout.="&1:"; }
1379: else { $ulsout.="&0:"; }
1380: }
1381: closedir(LSDIR);
1382: }
1383: } else {
1384: my @ulsstats=stat($ulsdir);
1385: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1386: }
1387: } else {
1388: $ulsout='no_such_dir';
1389: }
1390: if ($ulsout eq '') { $ulsout='empty'; }
1.249 foxr 1391: &Reply($client, "$ulsout\n", $userinput); # This supports debug logging.
1.239 foxr 1392:
1393: return 1;
1394:
1395: }
1396: ®ister_handler("ls", \&ls_handler, 0, 1, 0);
1397:
1.238 foxr 1398:
1.243 banghart 1399:
1400:
1.218 foxr 1401: # Process a reinit request. Reinit requests that either
1402: # lonc or lond be reinitialized so that an updated
1403: # host.tab or domain.tab can be processed.
1404: #
1405: # Parameters:
1406: # $cmd - the actual keyword that invoked us.
1407: # $tail - the tail of the request that invoked us.
1408: # $client - File descriptor connected to the client
1409: # Returns:
1410: # 1 - Ok to continue processing.
1411: # 0 - Program should exit
1412: # Implicit output:
1413: # a reply is sent to the client.
1414: #
1415: sub reinit_process_handler {
1416: my ($cmd, $tail, $client) = @_;
1417:
1418: my $userinput = "$cmd:$tail";
1419:
1420: my $cert = &GetCertificate($userinput);
1421: if(&ValidManager($cert)) {
1422: chomp($userinput);
1423: my $reply = &ReinitProcess($userinput);
1424: &Reply( $client, "$reply\n", $userinput);
1425: } else {
1426: &Failure( $client, "refused\n", $userinput);
1427: }
1428: return 1;
1429: }
1430:
1431: ®ister_handler("reinit", \&reinit_process_handler, 1, 0, 1);
1432:
1433: # Process the editing script for a table edit operation.
1434: # the editing operation must be encrypted and requested by
1435: # a manager host.
1436: #
1437: # Parameters:
1438: # $cmd - the actual keyword that invoked us.
1439: # $tail - the tail of the request that invoked us.
1440: # $client - File descriptor connected to the client
1441: # Returns:
1442: # 1 - Ok to continue processing.
1443: # 0 - Program should exit
1444: # Implicit output:
1445: # a reply is sent to the client.
1446: #
1447: sub edit_table_handler {
1448: my ($command, $tail, $client) = @_;
1449:
1450: my $userinput = "$command:$tail";
1451:
1452: my $cert = &GetCertificate($userinput);
1453: if(&ValidManager($cert)) {
1454: my($filetype, $script) = split(/:/, $tail);
1455: if (($filetype eq "hosts") ||
1456: ($filetype eq "domain")) {
1457: if($script ne "") {
1458: &Reply($client, # BUGBUG - EditFile
1459: &EditFile($userinput), # could fail.
1460: $userinput);
1461: } else {
1462: &Failure($client,"refused\n",$userinput);
1463: }
1464: } else {
1465: &Failure($client,"refused\n",$userinput);
1466: }
1467: } else {
1468: &Failure($client,"refused\n",$userinput);
1469: }
1470: return 1;
1471: }
1472: register_handler("edit", \&edit_table_handler, 1, 0, 1);
1473:
1474:
1.220 foxr 1475: #
1476: # Authenticate a user against the LonCAPA authentication
1477: # database. Note that there are several authentication
1478: # possibilities:
1479: # - unix - The user can be authenticated against the unix
1480: # password file.
1481: # - internal - The user can be authenticated against a purely
1482: # internal per user password file.
1483: # - kerberos - The user can be authenticated against either a kerb4 or kerb5
1484: # ticket granting authority.
1485: # - user - The person tailoring LonCAPA can supply a user authentication
1486: # mechanism that is per system.
1487: #
1488: # Parameters:
1489: # $cmd - The command that got us here.
1490: # $tail - Tail of the command (remaining parameters).
1491: # $client - File descriptor connected to client.
1492: # Returns
1493: # 0 - Requested to exit, caller should shut down.
1494: # 1 - Continue processing.
1495: # Implicit inputs:
1496: # The authentication systems describe above have their own forms of implicit
1497: # input into the authentication process that are described above.
1498: #
1499: sub authenticate_handler {
1500: my ($cmd, $tail, $client) = @_;
1501:
1502:
1503: # Regenerate the full input line
1504:
1505: my $userinput = $cmd.":".$tail;
1506:
1507: # udom - User's domain.
1508: # uname - Username.
1509: # upass - User's password.
1510:
1511: my ($udom,$uname,$upass)=split(/:/,$tail);
1512: &Debug(" Authenticate domain = $udom, user = $uname, password = $upass");
1513: chomp($upass);
1514: $upass=&unescape($upass);
1515:
1516: my $pwdcorrect = &validate_user($udom, $uname, $upass);
1517: if($pwdcorrect) {
1518: &Reply( $client, "authorized\n", $userinput);
1519: #
1520: # Bad credentials: Failed to authorize
1521: #
1522: } else {
1523: &Failure( $client, "non_authorized\n", $userinput);
1524: }
1525:
1526: return 1;
1527: }
1.218 foxr 1528:
1.220 foxr 1529: register_handler("auth", \&authenticate_handler, 1, 1, 0);
1.214 foxr 1530:
1.222 foxr 1531: #
1532: # Change a user's password. Note that this function is complicated by
1533: # the fact that a user may be authenticated in more than one way:
1534: # At present, we are not able to change the password for all types of
1535: # authentication methods. Only for:
1536: # unix - unix password or shadow passoword style authentication.
1537: # local - Locally written authentication mechanism.
1538: # For now, kerb4 and kerb5 password changes are not supported and result
1539: # in an error.
1540: # FUTURE WORK:
1541: # Support kerberos passwd changes?
1542: # Parameters:
1543: # $cmd - The command that got us here.
1544: # $tail - Tail of the command (remaining parameters).
1545: # $client - File descriptor connected to client.
1546: # Returns
1547: # 0 - Requested to exit, caller should shut down.
1548: # 1 - Continue processing.
1549: # Implicit inputs:
1550: # The authentication systems describe above have their own forms of implicit
1551: # input into the authentication process that are described above.
1552: sub change_password_handler {
1553: my ($cmd, $tail, $client) = @_;
1554:
1555: my $userinput = $cmd.":".$tail; # Reconstruct client's string.
1556:
1557: #
1558: # udom - user's domain.
1559: # uname - Username.
1560: # upass - Current password.
1561: # npass - New password.
1562:
1563: my ($udom,$uname,$upass,$npass)=split(/:/,$tail);
1564:
1565: $upass=&unescape($upass);
1566: $npass=&unescape($npass);
1567: &Debug("Trying to change password for $uname");
1568:
1569: # First require that the user can be authenticated with their
1570: # old password:
1571:
1572: my $validated = &validate_user($udom, $uname, $upass);
1573: if($validated) {
1574: my $realpasswd = &get_auth_type($udom, $uname); # Defined since authd.
1575:
1576: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1577: if ($howpwd eq 'internal') {
1578: &Debug("internal auth");
1579: my $salt=time;
1580: $salt=substr($salt,6,2);
1581: my $ncpass=crypt($npass,$salt);
1582: if(&rewrite_password_file($udom, $uname, "internal:$ncpass")) {
1583: &logthis("Result of password change for "
1584: ."$uname: pwchange_success");
1585: &Reply($client, "ok\n", $userinput);
1586: } else {
1587: &logthis("Unable to open $uname passwd "
1588: ."to change password");
1589: &Failure( $client, "non_authorized\n",$userinput);
1590: }
1591: } elsif ($howpwd eq 'unix') {
1592: # Unix means we have to access /etc/password
1593: &Debug("auth is unix");
1594: my $execdir=$perlvar{'lonDaemons'};
1595: &Debug("Opening lcpasswd pipeline");
1596: my $pf = IO::File->new("|$execdir/lcpasswd > "
1597: ."$perlvar{'lonDaemons'}"
1598: ."/logs/lcpasswd.log");
1599: print $pf "$uname\n$npass\n$npass\n";
1600: close $pf;
1601: my $err = $?;
1602: my $result = ($err>0 ? 'pwchange_failure' : 'ok');
1603: &logthis("Result of password change for $uname: ".
1604: &lcpasswdstrerror($?));
1605: &Reply($client, "$result\n", $userinput);
1606: } else {
1607: # this just means that the current password mode is not
1608: # one we know how to change (e.g the kerberos auth modes or
1609: # locally written auth handler).
1610: #
1611: &Failure( $client, "auth_mode_error\n", $userinput);
1612: }
1613:
1.224 foxr 1614: } else {
1.222 foxr 1615: &Failure( $client, "non_authorized\n", $userinput);
1616: }
1617:
1618: return 1;
1619: }
1620: register_handler("passwd", \&change_password_handler, 1, 1, 0);
1621:
1622:
1.225 foxr 1623: #
1624: # Create a new user. User in this case means a lon-capa user.
1625: # The user must either already exist in some authentication realm
1626: # like kerberos or the /etc/passwd. If not, a user completely local to
1627: # this loncapa system is created.
1628: #
1629: # Parameters:
1630: # $cmd - The command that got us here.
1631: # $tail - Tail of the command (remaining parameters).
1632: # $client - File descriptor connected to client.
1633: # Returns
1634: # 0 - Requested to exit, caller should shut down.
1635: # 1 - Continue processing.
1636: # Implicit inputs:
1637: # The authentication systems describe above have their own forms of implicit
1638: # input into the authentication process that are described above.
1639: sub add_user_handler {
1640:
1641: my ($cmd, $tail, $client) = @_;
1642:
1643:
1644: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
1645: my $userinput = $cmd.":".$tail; # Reconstruct the full request line.
1646:
1647: &Debug("cmd =".$cmd." $udom =".$udom." uname=".$uname);
1648:
1649:
1650: if($udom eq $currentdomainid) { # Reject new users for other domains...
1651:
1652: my $oldumask=umask(0077);
1653: chomp($npass);
1654: $npass=&unescape($npass);
1655: my $passfilename = &password_path($udom, $uname);
1656: &Debug("Password file created will be:".$passfilename);
1657: if (-e $passfilename) {
1658: &Failure( $client, "already_exists\n", $userinput);
1659: } else {
1660: my @fpparts=split(/\//,$passfilename);
1661: my $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
1662: my $fperror='';
1663: for (my $i=3;$i<= ($#fpparts-1);$i++) {
1664: $fpnow.='/'.$fpparts[$i];
1665: unless (-e $fpnow) {
1666: &logthis("mkdir $fpnow");
1667: unless (mkdir($fpnow,0777)) {
1668: $fperror="error: ".($!+0)." mkdir failed while attempting "
1669: ."makeuser";
1670: }
1671: }
1672: }
1673: unless ($fperror) {
1674: my $result=&make_passwd_file($uname, $umode,$npass, $passfilename);
1675: &Reply($client, $result, $userinput); #BUGBUG - could be fail
1676: } else {
1677: &Failure($client, "$fperror\n", $userinput);
1678: }
1679: }
1680: umask($oldumask);
1681: } else {
1682: &Failure($client, "not_right_domain\n",
1683: $userinput); # Even if we are multihomed.
1684:
1685: }
1686: return 1;
1687:
1688: }
1689: ®ister_handler("makeuser", \&add_user_handler, 1, 1, 0);
1690:
1691: #
1692: # Change the authentication method of a user. Note that this may
1693: # also implicitly change the user's password if, for example, the user is
1694: # joining an existing authentication realm. Known authentication realms at
1695: # this time are:
1696: # internal - Purely internal password file (only loncapa knows this user)
1697: # local - Institutionally written authentication module.
1698: # unix - Unix user (/etc/passwd with or without /etc/shadow).
1699: # kerb4 - kerberos version 4
1700: # kerb5 - kerberos version 5
1701: #
1702: # Parameters:
1703: # $cmd - The command that got us here.
1704: # $tail - Tail of the command (remaining parameters).
1705: # $client - File descriptor connected to client.
1706: # Returns
1707: # 0 - Requested to exit, caller should shut down.
1708: # 1 - Continue processing.
1709: # Implicit inputs:
1710: # The authentication systems describe above have their own forms of implicit
1711: # input into the authentication process that are described above.
1712: #
1713: sub change_authentication_handler {
1714:
1715: my ($cmd, $tail, $client) = @_;
1716:
1717: my $userinput = "$cmd:$tail"; # Reconstruct user input.
1718:
1719: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
1720: &Debug("cmd = ".$cmd." domain= ".$udom."uname =".$uname." umode= ".$umode);
1721: if ($udom ne $currentdomainid) {
1722: &Failure( $client, "not_right_domain\n", $client);
1723: } else {
1724:
1725: chomp($npass);
1726:
1727: $npass=&unescape($npass);
1728: my $passfilename = &password_path($udom, $uname);
1729: if ($passfilename) { # Not allowed to create a new user!!
1730: my $result=&make_passwd_file($uname, $umode,$npass,$passfilename);
1731: &Reply($client, $result, $userinput);
1732: } else {
1733: &Failure($client, "non_authorized", $userinput); # Fail the user now.
1734: }
1735: }
1736: return 1;
1737: }
1738: ®ister_handler("changeuserauth", \&change_authentication_handler, 1,1, 0);
1739:
1740: #
1741: # Determines if this is the home server for a user. The home server
1742: # for a user will have his/her lon-capa passwd file. Therefore all we need
1743: # to do is determine if this file exists.
1744: #
1745: # Parameters:
1746: # $cmd - The command that got us here.
1747: # $tail - Tail of the command (remaining parameters).
1748: # $client - File descriptor connected to client.
1749: # Returns
1750: # 0 - Requested to exit, caller should shut down.
1751: # 1 - Continue processing.
1752: # Implicit inputs:
1753: # The authentication systems describe above have their own forms of implicit
1754: # input into the authentication process that are described above.
1755: #
1756: sub is_home_handler {
1757: my ($cmd, $tail, $client) = @_;
1758:
1759: my $userinput = "$cmd:$tail";
1760:
1761: my ($udom,$uname)=split(/:/,$tail);
1762: chomp($uname);
1763: my $passfile = &password_filename($udom, $uname);
1764: if($passfile) {
1765: &Reply( $client, "found\n", $userinput);
1766: } else {
1767: &Failure($client, "not_found\n", $userinput);
1768: }
1769: return 1;
1770: }
1771: ®ister_handler("home", \&is_home_handler, 0,1,0);
1772:
1773: #
1774: # Process an update request for a resource?? I think what's going on here is
1775: # that a resource has been modified that we hold a subscription to.
1776: # If the resource is not local, then we must update, or at least invalidate our
1777: # cached copy of the resource.
1778: # FUTURE WORK:
1779: # I need to look at this logic carefully. My druthers would be to follow
1780: # typical caching logic, and simple invalidate the cache, drop any subscription
1781: # an let the next fetch start the ball rolling again... however that may
1782: # actually be more difficult than it looks given the complex web of
1783: # proxy servers.
1784: # Parameters:
1785: # $cmd - The command that got us here.
1786: # $tail - Tail of the command (remaining parameters).
1787: # $client - File descriptor connected to client.
1788: # Returns
1789: # 0 - Requested to exit, caller should shut down.
1790: # 1 - Continue processing.
1791: # Implicit inputs:
1792: # The authentication systems describe above have their own forms of implicit
1793: # input into the authentication process that are described above.
1794: #
1795: sub update_resource_handler {
1796:
1797: my ($cmd, $tail, $client) = @_;
1798:
1799: my $userinput = "$cmd:$tail";
1800:
1801: my $fname= $tail; # This allows interactive testing
1802:
1803:
1804: my $ownership=ishome($fname);
1805: if ($ownership eq 'not_owner') {
1806: if (-e $fname) {
1807: my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
1808: $atime,$mtime,$ctime,$blksize,$blocks)=stat($fname);
1809: my $now=time;
1810: my $since=$now-$atime;
1811: if ($since>$perlvar{'lonExpire'}) {
1812: my $reply=&reply("unsub:$fname","$clientname");
1813: unlink("$fname");
1814: } else {
1815: my $transname="$fname.in.transfer";
1816: my $remoteurl=&reply("sub:$fname","$clientname");
1817: my $response;
1818: alarm(120);
1819: {
1820: my $ua=new LWP::UserAgent;
1821: my $request=new HTTP::Request('GET',"$remoteurl");
1822: $response=$ua->request($request,$transname);
1823: }
1824: alarm(0);
1825: if ($response->is_error()) {
1826: unlink($transname);
1827: my $message=$response->status_line;
1828: &logthis("LWP GET: $message for $fname ($remoteurl)");
1829: } else {
1830: if ($remoteurl!~/\.meta$/) {
1831: alarm(120);
1832: {
1833: my $ua=new LWP::UserAgent;
1834: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1835: my $mresponse=$ua->request($mrequest,$fname.'.meta');
1836: if ($mresponse->is_error()) {
1837: unlink($fname.'.meta');
1838: }
1839: }
1840: alarm(0);
1841: }
1842: rename($transname,$fname);
1843: }
1844: }
1845: &Reply( $client, "ok\n", $userinput);
1846: } else {
1847: &Failure($client, "not_found\n", $userinput);
1848: }
1849: } else {
1850: &Failure($client, "rejected\n", $userinput);
1851: }
1852: return 1;
1853: }
1854: ®ister_handler("update", \&update_resource_handler, 0 ,1, 0);
1855:
1856: #
1.226 foxr 1857: # Fetch a user file from a remote server to the user's home directory
1858: # userfiles subdir.
1.225 foxr 1859: # Parameters:
1860: # $cmd - The command that got us here.
1861: # $tail - Tail of the command (remaining parameters).
1862: # $client - File descriptor connected to client.
1863: # Returns
1864: # 0 - Requested to exit, caller should shut down.
1865: # 1 - Continue processing.
1866: #
1867: sub fetch_user_file_handler {
1868:
1869: my ($cmd, $tail, $client) = @_;
1870:
1871: my $userinput = "$cmd:$tail";
1872: my $fname = $tail;
1.232 foxr 1873: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
1.225 foxr 1874: my $udir=&propath($udom,$uname).'/userfiles';
1875: unless (-e $udir) {
1876: mkdir($udir,0770);
1877: }
1.232 foxr 1878: Debug("fetch user file for $fname");
1.225 foxr 1879: if (-e $udir) {
1880: $ufile=~s/^[\.\~]+//;
1.232 foxr 1881:
1882: # IF necessary, create the path right down to the file.
1883: # Note that any regular files in the way of this path are
1884: # wiped out to deal with some earlier folly of mine.
1885:
1886: my $path = $udir;
1887: if ($ufile =~m|(.+)/([^/]+)$|) {
1888: my @parts=split('/',$1);
1889: foreach my $part (@parts) {
1890: $path .= '/'.$part;
1891: if( -f $path) {
1892: unlink($path);
1893: }
1894: if ((-e $path)!=1) {
1895: mkdir($path,0770);
1896: }
1897: }
1898: }
1899:
1900:
1.225 foxr 1901: my $destname=$udir.'/'.$ufile;
1902: my $transname=$udir.'/'.$ufile.'.in.transit';
1903: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
1904: my $response;
1.232 foxr 1905: Debug("Remote URL : $remoteurl Transfername $transname Destname: $destname");
1.225 foxr 1906: alarm(120);
1907: {
1908: my $ua=new LWP::UserAgent;
1909: my $request=new HTTP::Request('GET',"$remoteurl");
1910: $response=$ua->request($request,$transname);
1911: }
1912: alarm(0);
1913: if ($response->is_error()) {
1914: unlink($transname);
1915: my $message=$response->status_line;
1916: &logthis("LWP GET: $message for $fname ($remoteurl)");
1917: &Failure($client, "failed\n", $userinput);
1918: } else {
1.232 foxr 1919: Debug("Renaming $transname to $destname");
1.225 foxr 1920: if (!rename($transname,$destname)) {
1921: &logthis("Unable to move $transname to $destname");
1922: unlink($transname);
1923: &Failure($client, "failed\n", $userinput);
1924: } else {
1925: &Reply($client, "ok\n", $userinput);
1926: }
1927: }
1928: } else {
1929: &Failure($client, "not_home\n", $userinput);
1930: }
1931: return 1;
1932: }
1933: ®ister_handler("fetchuserfile", \&fetch_user_file_handler, 0, 1, 0);
1934:
1.226 foxr 1935: #
1936: # Remove a file from a user's home directory userfiles subdirectory.
1937: # Parameters:
1938: # cmd - the Lond request keyword that got us here.
1939: # tail - the part of the command past the keyword.
1940: # client- File descriptor connected with the client.
1941: #
1942: # Returns:
1943: # 1 - Continue processing.
1944:
1945: sub remove_user_file_handler {
1946: my ($cmd, $tail, $client) = @_;
1947:
1948: my ($fname) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
1949:
1950: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
1951: if ($ufile =~m|/\.\./|) {
1952: # any files paths with /../ in them refuse
1953: # to deal with
1954: &Failure($client, "refused\n", "$cmd:$tail");
1955: } else {
1956: my $udir = &propath($udom,$uname);
1957: if (-e $udir) {
1958: my $file=$udir.'/userfiles/'.$ufile;
1959: if (-e $file) {
1.240 banghart 1960: if (-f $file){
1.241 albertel 1961: unlink($file);
1962: } elsif(-d $file) {
1963: rmdir($file);
1.240 banghart 1964: }
1.226 foxr 1965: if (-e $file) {
1966: &Failure($client, "failed\n", "$cmd:$tail");
1967: } else {
1968: &Reply($client, "ok\n", "$cmd:$tail");
1969: }
1970: } else {
1971: &Failure($client, "not_found\n", "$cmd:$tail");
1972: }
1973: } else {
1974: &Failure($client, "not_home\n", "$cmd:$tail");
1975: }
1976: }
1977: return 1;
1978: }
1979: ®ister_handler("removeuserfile", \&remove_user_file_handler, 0,1,0);
1980:
1.236 albertel 1981: #
1982: # make a directory in a user's home directory userfiles subdirectory.
1983: # Parameters:
1984: # cmd - the Lond request keyword that got us here.
1985: # tail - the part of the command past the keyword.
1986: # client- File descriptor connected with the client.
1987: #
1988: # Returns:
1989: # 1 - Continue processing.
1990:
1991: sub mkdir_user_file_handler {
1992: my ($cmd, $tail, $client) = @_;
1993:
1994: my ($dir) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
1995: $dir=&unescape($dir);
1996: my ($udom,$uname,$ufile) = ($dir =~ m|^([^/]+)/([^/]+)/(.+)$|);
1997: if ($ufile =~m|/\.\./|) {
1998: # any files paths with /../ in them refuse
1999: # to deal with
2000: &Failure($client, "refused\n", "$cmd:$tail");
2001: } else {
2002: my $udir = &propath($udom,$uname);
2003: if (-e $udir) {
2004: my $newdir=$udir.'/userfiles/'.$ufile;
2005: if (!-e $newdir) {
2006: mkdir($newdir);
2007: if (!-e $newdir) {
2008: &Failure($client, "failed\n", "$cmd:$tail");
2009: } else {
2010: &Reply($client, "ok\n", "$cmd:$tail");
2011: }
2012: } else {
2013: &Failure($client, "not_found\n", "$cmd:$tail");
2014: }
2015: } else {
2016: &Failure($client, "not_home\n", "$cmd:$tail");
2017: }
2018: }
2019: return 1;
2020: }
2021: ®ister_handler("mkdiruserfile", \&mkdir_user_file_handler, 0,1,0);
2022:
1.237 albertel 2023: #
2024: # rename a file in a user's home directory userfiles subdirectory.
2025: # Parameters:
2026: # cmd - the Lond request keyword that got us here.
2027: # tail - the part of the command past the keyword.
2028: # client- File descriptor connected with the client.
2029: #
2030: # Returns:
2031: # 1 - Continue processing.
2032:
2033: sub rename_user_file_handler {
2034: my ($cmd, $tail, $client) = @_;
2035:
2036: my ($udom,$uname,$old,$new) = split(/:/, $tail);
2037: $old=&unescape($old);
2038: $new=&unescape($new);
2039: if ($new =~m|/\.\./| || $old =~m|/\.\./|) {
2040: # any files paths with /../ in them refuse to deal with
2041: &Failure($client, "refused\n", "$cmd:$tail");
2042: } else {
2043: my $udir = &propath($udom,$uname);
2044: if (-e $udir) {
2045: my $oldfile=$udir.'/userfiles/'.$old;
2046: my $newfile=$udir.'/userfiles/'.$new;
2047: if (-e $newfile) {
2048: &Failure($client, "exists\n", "$cmd:$tail");
2049: } elsif (! -e $oldfile) {
2050: &Failure($client, "not_found\n", "$cmd:$tail");
2051: } else {
2052: if (!rename($oldfile,$newfile)) {
2053: &Failure($client, "failed\n", "$cmd:$tail");
2054: } else {
2055: &Reply($client, "ok\n", "$cmd:$tail");
2056: }
2057: }
2058: } else {
2059: &Failure($client, "not_home\n", "$cmd:$tail");
2060: }
2061: }
2062: return 1;
2063: }
2064: ®ister_handler("renameuserfile", \&rename_user_file_handler, 0,1,0);
2065:
1.227 foxr 2066:
2067: #
2068: # Authenticate access to a user file by checking the user's
2069: # session token(?)
2070: #
2071: # Parameters:
2072: # cmd - The request keyword that dispatched to tus.
2073: # tail - The tail of the request (colon separated parameters).
2074: # client - Filehandle open on the client.
2075: # Return:
2076: # 1.
2077:
2078: sub token_auth_user_file_handler {
2079: my ($cmd, $tail, $client) = @_;
2080:
2081: my ($fname, $session) = split(/:/, $tail);
2082:
2083: chomp($session);
2084: my $reply='non_auth';
2085: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
2086: $session.'.id')) {
2087: while (my $line=<ENVIN>) {
2088: if ($line=~ m|userfile\.\Q$fname\E\=|) { $reply='ok'; }
2089: }
2090: close(ENVIN);
2091: &Reply($client, $reply);
2092: } else {
2093: &Failure($client, "invalid_token\n", "$cmd:$tail");
2094: }
2095: return 1;
2096:
2097: }
2098:
2099: ®ister_handler("tokenauthuserfile", \&token_auth_user_file_handler, 0,1,0);
1.229 foxr 2100:
2101:
2102: #
2103: # Unsubscribe from a resource.
2104: #
2105: # Parameters:
2106: # $cmd - The command that got us here.
2107: # $tail - Tail of the command (remaining parameters).
2108: # $client - File descriptor connected to client.
2109: # Returns
2110: # 0 - Requested to exit, caller should shut down.
2111: # 1 - Continue processing.
2112: #
2113: sub unsubscribe_handler {
2114: my ($cmd, $tail, $client) = @_;
2115:
2116: my $userinput= "$cmd:$tail";
2117:
2118: my ($fname) = split(/:/,$tail); # Split in case there's extrs.
2119:
2120: &Debug("Unsubscribing $fname");
2121: if (-e $fname) {
2122: &Debug("Exists");
2123: &Reply($client, &unsub($fname,$clientip), $userinput);
2124: } else {
2125: &Failure($client, "not_found\n", $userinput);
2126: }
2127: return 1;
2128: }
2129: ®ister_handler("unsub", \&unsubscribe_handler, 0, 1, 0);
1.230 foxr 2130: # Subscribe to a resource
2131: #
2132: # Parameters:
2133: # $cmd - The command that got us here.
2134: # $tail - Tail of the command (remaining parameters).
2135: # $client - File descriptor connected to client.
2136: # Returns
2137: # 0 - Requested to exit, caller should shut down.
2138: # 1 - Continue processing.
2139: #
2140: sub subscribe_handler {
2141: my ($cmd, $tail, $client)= @_;
2142:
2143: my $userinput = "$cmd:$tail";
2144:
2145: &Reply( $client, &subscribe($userinput,$clientip), $userinput);
2146:
2147: return 1;
2148: }
2149: ®ister_handler("sub", \&subscribe_handler, 0, 1, 0);
2150:
2151: #
2152: # Determine the version of a resource (?) Or is it return
2153: # the top version of the resource? Not yet clear from the
2154: # code in currentversion.
2155: #
2156: # Parameters:
2157: # $cmd - The command that got us here.
2158: # $tail - Tail of the command (remaining parameters).
2159: # $client - File descriptor connected to client.
2160: # Returns
2161: # 0 - Requested to exit, caller should shut down.
2162: # 1 - Continue processing.
2163: #
2164: sub current_version_handler {
2165: my ($cmd, $tail, $client) = @_;
2166:
2167: my $userinput= "$cmd:$tail";
2168:
2169: my $fname = $tail;
2170: &Reply( $client, ¤tversion($fname)."\n", $userinput);
2171: return 1;
2172:
2173: }
2174: ®ister_handler("currentversion", \¤t_version_handler, 0, 1, 0);
2175:
2176: # Make an entry in a user's activity log.
2177: #
2178: # Parameters:
2179: # $cmd - The command that got us here.
2180: # $tail - Tail of the command (remaining parameters).
2181: # $client - File descriptor connected to client.
2182: # Returns
2183: # 0 - Requested to exit, caller should shut down.
2184: # 1 - Continue processing.
2185: #
2186: sub activity_log_handler {
2187: my ($cmd, $tail, $client) = @_;
2188:
2189:
2190: my $userinput= "$cmd:$tail";
2191:
2192: my ($udom,$uname,$what)=split(/:/,$tail);
2193: chomp($what);
2194: my $proname=&propath($udom,$uname);
2195: my $now=time;
2196: my $hfh;
2197: if ($hfh=IO::File->new(">>$proname/activity.log")) {
2198: print $hfh "$now:$clientname:$what\n";
2199: &Reply( $client, "ok\n", $userinput);
2200: } else {
2201: &Failure($client, "error: ".($!+0)." IO::File->new Failed "
2202: ."while attempting log\n",
2203: $userinput);
2204: }
2205:
2206: return 1;
2207: }
2208: register_handler("log", \&activity_log_handler, 0, 1, 0);
2209:
2210: #
2211: # Put a namespace entry in a user profile hash.
2212: # My druthers would be for this to be an encrypted interaction too.
2213: # anything that might be an inadvertent covert channel about either
2214: # user authentication or user personal information....
2215: #
2216: # Parameters:
2217: # $cmd - The command that got us here.
2218: # $tail - Tail of the command (remaining parameters).
2219: # $client - File descriptor connected to client.
2220: # Returns
2221: # 0 - Requested to exit, caller should shut down.
2222: # 1 - Continue processing.
2223: #
2224: sub put_user_profile_entry {
2225: my ($cmd, $tail, $client) = @_;
1.229 foxr 2226:
1.230 foxr 2227: my $userinput = "$cmd:$tail";
2228:
1.242 raeburn 2229: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
1.230 foxr 2230: if ($namespace ne 'roles') {
2231: chomp($what);
2232: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2233: &GDBM_WRCREAT(),"P",$what);
2234: if($hashref) {
2235: my @pairs=split(/\&/,$what);
2236: foreach my $pair (@pairs) {
2237: my ($key,$value)=split(/=/,$pair);
2238: $hashref->{$key}=$value;
2239: }
2240: if (untie(%$hashref)) {
2241: &Reply( $client, "ok\n", $userinput);
2242: } else {
2243: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2244: "while attempting put\n",
2245: $userinput);
2246: }
2247: } else {
2248: &Failure( $client, "error: ".($!)." tie(GDBM) Failed ".
2249: "while attempting put\n", $userinput);
2250: }
2251: } else {
2252: &Failure( $client, "refused\n", $userinput);
2253: }
2254:
2255: return 1;
2256: }
2257: ®ister_handler("put", \&put_user_profile_entry, 0, 1, 0);
2258:
2259: #
2260: # Increment a profile entry in the user history file.
2261: # The history contains keyword value pairs. In this case,
2262: # The value itself is a pair of numbers. The first, the current value
2263: # the second an increment that this function applies to the current
2264: # value.
2265: #
2266: # Parameters:
2267: # $cmd - The command that got us here.
2268: # $tail - Tail of the command (remaining parameters).
2269: # $client - File descriptor connected to client.
2270: # Returns
2271: # 0 - Requested to exit, caller should shut down.
2272: # 1 - Continue processing.
2273: #
2274: sub increment_user_value_handler {
2275: my ($cmd, $tail, $client) = @_;
2276:
2277: my $userinput = "$cmd:$tail";
2278:
2279: my ($udom,$uname,$namespace,$what) =split(/:/,$tail);
2280: if ($namespace ne 'roles') {
2281: chomp($what);
2282: my $hashref = &tie_user_hash($udom, $uname,
2283: $namespace, &GDBM_WRCREAT(),
2284: "P",$what);
2285: if ($hashref) {
2286: my @pairs=split(/\&/,$what);
2287: foreach my $pair (@pairs) {
2288: my ($key,$value)=split(/=/,$pair);
2289: # We could check that we have a number...
2290: if (! defined($value) || $value eq '') {
2291: $value = 1;
2292: }
2293: $hashref->{$key}+=$value;
2294: }
2295: if (untie(%$hashref)) {
2296: &Reply( $client, "ok\n", $userinput);
2297: } else {
2298: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
2299: "while attempting inc\n", $userinput);
2300: }
2301: } else {
2302: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2303: "while attempting inc\n", $userinput);
2304: }
2305: } else {
2306: &Failure($client, "refused\n", $userinput);
2307: }
2308:
2309: return 1;
2310: }
2311: ®ister_handler("inc", \&increment_user_value_handler, 0, 1, 0);
2312:
2313:
2314: #
2315: # Put a new role for a user. Roles are LonCAPA's packaging of permissions.
2316: # Each 'role' a user has implies a set of permissions. Adding a new role
2317: # for a person grants the permissions packaged with that role
2318: # to that user when the role is selected.
2319: #
2320: # Parameters:
2321: # $cmd - The command string (rolesput).
2322: # $tail - The remainder of the request line. For rolesput this
2323: # consists of a colon separated list that contains:
2324: # The domain and user that is granting the role (logged).
2325: # The domain and user that is getting the role.
2326: # The roles being granted as a set of & separated pairs.
2327: # each pair a key value pair.
2328: # $client - File descriptor connected to the client.
2329: # Returns:
2330: # 0 - If the daemon should exit
2331: # 1 - To continue processing.
2332: #
2333: #
2334: sub roles_put_handler {
2335: my ($cmd, $tail, $client) = @_;
2336:
2337: my $userinput = "$cmd:$tail";
2338:
2339: my ( $exedom, $exeuser, $udom, $uname, $what) = split(/:/,$tail);
2340:
2341:
2342: my $namespace='roles';
2343: chomp($what);
2344: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2345: &GDBM_WRCREAT(), "P",
2346: "$exedom:$exeuser:$what");
2347: #
2348: # Log the attempt to set a role. The {}'s here ensure that the file
2349: # handle is open for the minimal amount of time. Since the flush
2350: # is done on close this improves the chances the log will be an un-
2351: # corrupted ordered thing.
2352: if ($hashref) {
2353: my @pairs=split(/\&/,$what);
2354: foreach my $pair (@pairs) {
2355: my ($key,$value)=split(/=/,$pair);
2356: &manage_permissions($key, $udom, $uname,
2357: &get_auth_type( $udom, $uname));
2358: $hashref->{$key}=$value;
2359: }
2360: if (untie($hashref)) {
2361: &Reply($client, "ok\n", $userinput);
2362: } else {
2363: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2364: "while attempting rolesput\n", $userinput);
2365: }
2366: } else {
2367: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2368: "while attempting rolesput\n", $userinput);
2369: }
2370: return 1;
2371: }
2372: ®ister_handler("rolesput", \&roles_put_handler, 1,1,0); # Encoded client only.
2373:
2374: #
1.231 foxr 2375: # Deletes (removes) a role for a user. This is equivalent to removing
2376: # a permissions package associated with the role from the user's profile.
2377: #
2378: # Parameters:
2379: # $cmd - The command (rolesdel)
2380: # $tail - The remainder of the request line. This consists
2381: # of:
2382: # The domain and user requesting the change (logged)
2383: # The domain and user being changed.
2384: # The roles being revoked. These are shipped to us
2385: # as a bunch of & separated role name keywords.
2386: # $client - The file handle open on the client.
2387: # Returns:
2388: # 1 - Continue processing
2389: # 0 - Exit.
2390: #
2391: sub roles_delete_handler {
2392: my ($cmd, $tail, $client) = @_;
2393:
2394: my $userinput = "$cmd:$tail";
2395:
2396: my ($exedom,$exeuser,$udom,$uname,$what)=split(/:/,$tail);
2397: &Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom.
2398: "what = ".$what);
2399: my $namespace='roles';
2400: chomp($what);
2401: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2402: &GDBM_WRCREAT(), "D",
2403: "$exedom:$exeuser:$what");
2404:
2405: if ($hashref) {
2406: my @rolekeys=split(/\&/,$what);
2407:
2408: foreach my $key (@rolekeys) {
2409: delete $hashref->{$key};
2410: }
2411: if (untie(%$hashref)) {
2412: &Reply($client, "ok\n", $userinput);
2413: } else {
2414: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2415: "while attempting rolesdel\n", $userinput);
2416: }
2417: } else {
2418: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2419: "while attempting rolesdel\n", $userinput);
2420: }
2421:
2422: return 1;
2423: }
2424: ®ister_handler("rolesdel", \&roles_delete_handler, 1,1, 0); # Encoded client only
2425:
2426: # Unencrypted get from a user's profile database. See
2427: # GetProfileEntryEncrypted for a version that does end-to-end encryption.
2428: # This function retrieves a keyed item from a specific named database in the
2429: # user's directory.
2430: #
2431: # Parameters:
2432: # $cmd - Command request keyword (get).
2433: # $tail - Tail of the command. This is a colon separated list
2434: # consisting of the domain and username that uniquely
2435: # identifies the profile,
2436: # The 'namespace' which selects the gdbm file to
2437: # do the lookup in,
2438: # & separated list of keys to lookup. Note that
2439: # the values are returned as an & separated list too.
2440: # $client - File descriptor open on the client.
2441: # Returns:
2442: # 1 - Continue processing.
2443: # 0 - Exit.
2444: #
2445: sub get_profile_entry {
2446: my ($cmd, $tail, $client) = @_;
2447:
2448: my $userinput= "$cmd:$tail";
2449:
2450: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2451: chomp($what);
2452: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2453: &GDBM_READER());
2454: if ($hashref) {
2455: my @queries=split(/\&/,$what);
2456: my $qresult='';
2457:
2458: for (my $i=0;$i<=$#queries;$i++) {
2459: $qresult.="$hashref->{$queries[$i]}&"; # Presumably failure gives empty string.
2460: }
2461: $qresult=~s/\&$//; # Remove trailing & from last lookup.
2462: if (untie(%$hashref)) {
2463: &Reply($client, "$qresult\n", $userinput);
2464: } else {
2465: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2466: "while attempting get\n", $userinput);
2467: }
2468: } else {
2469: if ($!+0 == 2) { # +0 coerces errno -> number 2 is ENOENT
2470: &Failure($client, "error:No such file or ".
2471: "GDBM reported bad block error\n", $userinput);
2472: } else { # Some other undifferentiated err.
2473: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2474: "while attempting get\n", $userinput);
2475: }
2476: }
2477: return 1;
2478: }
2479: ®ister_handler("get", \&get_profile_entry, 0,1,0);
2480:
2481: #
2482: # Process the encrypted get request. Note that the request is sent
2483: # in clear, but the reply is encrypted. This is a small covert channel:
2484: # information about the sensitive keys is given to the snooper. Just not
2485: # information about the values of the sensitive key. Hmm if I wanted to
2486: # know these I'd snoop for the egets. Get the profile item names from them
2487: # and then issue a get for them since there's no enforcement of the
2488: # requirement of an encrypted get for particular profile items. If I
2489: # were re-doing this, I'd force the request to be encrypted as well as the
2490: # reply. I'd also just enforce encrypted transactions for all gets since
2491: # that would prevent any covert channel snooping.
2492: #
2493: # Parameters:
2494: # $cmd - Command keyword of request (eget).
2495: # $tail - Tail of the command. See GetProfileEntry
# for more information about this.
2496: # $client - File open on the client.
2497: # Returns:
2498: # 1 - Continue processing
2499: # 0 - server should exit.
2500: sub get_profile_entry_encrypted {
2501: my ($cmd, $tail, $client) = @_;
2502:
2503: my $userinput = "$cmd:$tail";
2504:
2505: my ($cmd,$udom,$uname,$namespace,$what) = split(/:/,$userinput);
2506: chomp($what);
2507: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2508: &GDBM_READER());
2509: if ($hashref) {
2510: my @queries=split(/\&/,$what);
2511: my $qresult='';
2512: for (my $i=0;$i<=$#queries;$i++) {
2513: $qresult.="$hashref->{$queries[$i]}&";
2514: }
2515: if (untie(%$hashref)) {
2516: $qresult=~s/\&$//;
2517: if ($cipher) {
2518: my $cmdlength=length($qresult);
2519: $qresult.=" ";
2520: my $encqresult='';
2521: for(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
2522: $encqresult.= unpack("H16",
2523: $cipher->encrypt(substr($qresult,
2524: $encidx,
2525: 8)));
2526: }
2527: &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput);
2528: } else {
2529: &Failure( $client, "error:no_key\n", $userinput);
2530: }
2531: } else {
2532: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2533: "while attempting eget\n", $userinput);
2534: }
2535: } else {
2536: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2537: "while attempting eget\n", $userinput);
2538: }
2539:
2540: return 1;
2541: }
2542: ®ister_handler("eget", \&GetProfileEntryEncrypted, 0, 1, 0);
2543: #
2544: # Deletes a key in a user profile database.
2545: #
2546: # Parameters:
2547: # $cmd - Command keyword (del).
2548: # $tail - Command tail. IN this case a colon
2549: # separated list containing:
2550: # The domain and user that identifies uniquely
2551: # the identity of the user.
2552: # The profile namespace (name of the profile
2553: # database file).
2554: # & separated list of keywords to delete.
2555: # $client - File open on client socket.
2556: # Returns:
2557: # 1 - Continue processing
2558: # 0 - Exit server.
2559: #
2560: #
2561:
2562: sub delete_profile_entry {
2563: my ($cmd, $tail, $client) = @_;
2564:
2565: my $userinput = "cmd:$tail";
2566:
2567: my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
2568: chomp($what);
2569: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2570: &GDBM_WRCREAT(),
2571: "D",$what);
2572: if ($hashref) {
2573: my @keys=split(/\&/,$what);
2574: foreach my $key (@keys) {
2575: delete($hashref->{$key});
2576: }
2577: if (untie(%$hashref)) {
2578: &Reply($client, "ok\n", $userinput);
2579: } else {
2580: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2581: "while attempting del\n", $userinput);
2582: }
2583: } else {
2584: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2585: "while attempting del\n", $userinput);
2586: }
2587: return 1;
2588: }
2589: ®ister_handler("del", \&delete_profile_entry, 0, 1, 0);
2590: #
2591: # List the set of keys that are defined in a profile database file.
2592: # A successful reply from this will contain an & separated list of
2593: # the keys.
2594: # Parameters:
2595: # $cmd - Command request (keys).
2596: # $tail - Remainder of the request, a colon separated
2597: # list containing domain/user that identifies the
2598: # user being queried, and the database namespace
2599: # (database filename essentially).
2600: # $client - File open on the client.
2601: # Returns:
2602: # 1 - Continue processing.
2603: # 0 - Exit the server.
2604: #
2605: sub get_profile_keys {
2606: my ($cmd, $tail, $client) = @_;
2607:
2608: my $userinput = "$cmd:$tail";
2609:
2610: my ($udom,$uname,$namespace)=split(/:/,$tail);
2611: my $qresult='';
2612: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2613: &GDBM_READER());
2614: if ($hashref) {
2615: foreach my $key (keys %$hashref) {
2616: $qresult.="$key&";
2617: }
2618: if (untie(%$hashref)) {
2619: $qresult=~s/\&$//;
2620: &Reply($client, "$qresult\n", $userinput);
2621: } else {
2622: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2623: "while attempting keys\n", $userinput);
2624: }
2625: } else {
2626: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2627: "while attempting keys\n", $userinput);
2628: }
2629:
2630: return 1;
2631: }
2632: ®ister_handler("keys", \&get_profile_keys, 0, 1, 0);
2633:
2634: #
2635: # Dump the contents of a user profile database.
2636: # Note that this constitutes a very large covert channel too since
2637: # the dump will return sensitive information that is not encrypted.
2638: # The naive security assumption is that the session negotiation ensures
2639: # our client is trusted and I don't believe that's assured at present.
2640: # Sure want badly to go to ssl or tls. Of course if my peer isn't really
2641: # a LonCAPA node they could have negotiated an encryption key too so >sigh<.
2642: #
2643: # Parameters:
2644: # $cmd - The command request keyword (currentdump).
2645: # $tail - Remainder of the request, consisting of a colon
2646: # separated list that has the domain/username and
2647: # the namespace to dump (database file).
2648: # $client - file open on the remote client.
2649: # Returns:
2650: # 1 - Continue processing.
2651: # 0 - Exit the server.
2652: #
2653: sub dump_profile_database {
2654: my ($cmd, $tail, $client) = @_;
2655:
2656: my $userinput = "$cmd:$tail";
2657:
2658: my ($udom,$uname,$namespace) = split(/:/,$tail);
2659: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2660: &GDBM_READER());
2661: if ($hashref) {
2662: # Structure of %data:
2663: # $data{$symb}->{$parameter}=$value;
2664: # $data{$symb}->{'v.'.$parameter}=$version;
2665: # since $parameter will be unescaped, we do not
2666: # have to worry about silly parameter names...
2667:
2668: my $qresult='';
2669: my %data = (); # A hash of anonymous hashes..
2670: while (my ($key,$value) = each(%$hashref)) {
2671: my ($v,$symb,$param) = split(/:/,$key);
2672: next if ($v eq 'version' || $symb eq 'keys');
2673: next if (exists($data{$symb}) &&
2674: exists($data{$symb}->{$param}) &&
2675: $data{$symb}->{'v.'.$param} > $v);
2676: $data{$symb}->{$param}=$value;
2677: $data{$symb}->{'v.'.$param}=$v;
2678: }
2679: if (untie(%$hashref)) {
2680: while (my ($symb,$param_hash) = each(%data)) {
2681: while(my ($param,$value) = each (%$param_hash)){
2682: next if ($param =~ /^v\./); # Ignore versions...
2683: #
2684: # Just dump the symb=value pairs separated by &
2685: #
2686: $qresult.=$symb.':'.$param.'='.$value.'&';
2687: }
2688: }
2689: chop($qresult);
2690: &Reply($client , "$qresult\n", $userinput);
2691: } else {
2692: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2693: "while attempting currentdump\n", $userinput);
2694: }
2695: } else {
2696: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2697: "while attempting currentdump\n", $userinput);
2698: }
2699:
2700: return 1;
2701: }
2702: ®ister_handler("currentdump", \&dump_profile_database, 0, 1, 0);
2703:
2704: #
2705: # Dump a profile database with an optional regular expression
2706: # to match against the keys. In this dump, no effort is made
2707: # to separate symb from version information. Presumably the
2708: # databases that are dumped by this command are of a different
2709: # structure. Need to look at this and improve the documentation of
2710: # both this and the currentdump handler.
2711: # Parameters:
2712: # $cmd - The command keyword.
2713: # $tail - All of the characters after the $cmd:
2714: # These are expected to be a colon
2715: # separated list containing:
2716: # domain/user - identifying the user.
2717: # namespace - identifying the database.
2718: # regexp - optional regular expression
2719: # that is matched against
2720: # database keywords to do
2721: # selective dumps.
2722: # $client - Channel open on the client.
2723: # Returns:
2724: # 1 - Continue processing.
2725: # Side effects:
2726: # response is written to $client.
2727: #
2728: sub dump_with_regexp {
2729: my ($cmd, $tail, $client) = @_;
2730:
2731:
2732: my $userinput = "$cmd:$tail";
2733:
2734: my ($udom,$uname,$namespace,$regexp)=split(/:/,$tail);
2735: if (defined($regexp)) {
2736: $regexp=&unescape($regexp);
2737: } else {
2738: $regexp='.';
2739: }
2740: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2741: &GDBM_READER());
2742: if ($hashref) {
2743: my $qresult='';
2744: while (my ($key,$value) = each(%$hashref)) {
2745: if ($regexp eq '.') {
2746: $qresult.=$key.'='.$value.'&';
2747: } else {
2748: my $unescapeKey = &unescape($key);
2749: if (eval('$unescapeKey=~/$regexp/')) {
2750: $qresult.="$key=$value&";
2751: }
2752: }
2753: }
2754: if (untie(%$hashref)) {
2755: chop($qresult);
2756: &Reply($client, "$qresult\n", $userinput);
2757: } else {
2758: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
2759: "while attempting dump\n", $userinput);
2760: }
2761: } else {
2762: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2763: "while attempting dump\n", $userinput);
2764: }
2765:
2766: return 1;
2767: }
2768:
2769: ®ister_handler("dump", \&dump_with_regexp, 0, 1, 0);
2770:
2771: # Store a set of key=value pairs associated with a versioned name.
2772: #
2773: # Parameters:
2774: # $cmd - Request command keyword.
2775: # $tail - Tail of the request. This is a colon
2776: # separated list containing:
2777: # domain/user - User and authentication domain.
2778: # namespace - Name of the database being modified
2779: # rid - Resource keyword to modify.
2780: # what - new value associated with rid.
2781: #
2782: # $client - Socket open on the client.
2783: #
2784: #
2785: # Returns:
2786: # 1 (keep on processing).
2787: # Side-Effects:
2788: # Writes to the client
2789: sub store_handler {
2790: my ($cmd, $tail, $client) = @_;
2791:
2792: my $userinput = "$cmd:$tail";
2793:
2794: my ($udom,$uname,$namespace,$rid,$what) =split(/:/,$tail);
2795: if ($namespace ne 'roles') {
2796:
2797: chomp($what);
2798: my @pairs=split(/\&/,$what);
2799: my $hashref = &tie_user_hash($udom, $uname, $namespace,
2800: &GDBM_WRCREAT(), "P",
2801: "$rid:$what");
2802: if ($hashref) {
2803: my $now = time;
2804: my @previouskeys=split(/&/,$hashref->{"keys:$rid"});
2805: my $key;
2806: $hashref->{"version:$rid"}++;
2807: my $version=$hashref->{"version:$rid"};
2808: my $allkeys='';
2809: foreach my $pair (@pairs) {
2810: my ($key,$value)=split(/=/,$pair);
2811: $allkeys.=$key.':';
2812: $hashref->{"$version:$rid:$key"}=$value;
2813: }
2814: $hashref->{"$version:$rid:timestamp"}=$now;
2815: $allkeys.='timestamp';
2816: $hashref->{"$version:keys:$rid"}=$allkeys;
2817: if (untie($hashref)) {
2818: &Reply($client, "ok\n", $userinput);
2819: } else {
2820: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2821: "while attempting store\n", $userinput);
2822: }
2823: } else {
2824: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
2825: "while attempting store\n", $userinput);
2826: }
2827: } else {
2828: &Failure($client, "refused\n", $userinput);
2829: }
2830:
2831: return 1;
2832: }
2833: ®ister_handler("store", \&store_handler, 0, 1, 0);
2834: #
2835: # Dump out all versions of a resource that has key=value pairs associated
2836: # with it for each version. These resources are built up via the store
2837: # command.
2838: #
2839: # Parameters:
2840: # $cmd - Command keyword.
2841: # $tail - Remainder of the request which consists of:
2842: # domain/user - User and auth. domain.
2843: # namespace - name of resource database.
2844: # rid - Resource id.
2845: # $client - socket open on the client.
2846: #
2847: # Returns:
2848: # 1 indicating the caller should not yet exit.
2849: # Side-effects:
2850: # Writes a reply to the client.
2851: # The reply is a string of the following shape:
2852: # version=current&version:keys=k1:k2...&1:k1=v1&1:k2=v2...
2853: # Where the 1 above represents version 1.
2854: # this continues for all pairs of keys in all versions.
2855: #
2856: #
2857: #
2858: #
2859: sub restore_handler {
2860: my ($cmd, $tail, $client) = @_;
2861:
2862: my $userinput = "$cmd:$tail"; # Only used for logging purposes.
2863:
2864: my ($cmd,$udom,$uname,$namespace,$rid) = split(/:/,$userinput);
2865: $namespace=~s/\//\_/g;
2866: $namespace=~s/\W//g;
2867: chomp($rid);
2868: my $proname=&propath($udom,$uname);
2869: my $qresult='';
2870: my %hash;
2871: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",
2872: &GDBM_READER(),0640)) {
2873: my $version=$hash{"version:$rid"};
2874: $qresult.="version=$version&";
2875: my $scope;
2876: for ($scope=1;$scope<=$version;$scope++) {
2877: my $vkeys=$hash{"$scope:keys:$rid"};
2878: my @keys=split(/:/,$vkeys);
2879: my $key;
2880: $qresult.="$scope:keys=$vkeys&";
2881: foreach $key (@keys) {
2882: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
2883: }
2884: }
2885: if (untie(%hash)) {
2886: $qresult=~s/\&$//;
2887: &Reply( $client, "$qresult\n", $userinput);
2888: } else {
2889: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
2890: "while attempting restore\n", $userinput);
2891: }
2892: } else {
2893: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
2894: "while attempting restore\n", $userinput);
2895: }
2896:
2897: return 1;
2898:
2899:
2900: }
2901: ®ister_handler("restore", \&restore_handler, 0,1,0);
1.234 foxr 2902:
2903: #
2904: # Add a chat message to to a discussion board.
2905: #
2906: # Parameters:
2907: # $cmd - Request keyword.
2908: # $tail - Tail of the command. A colon separated list
2909: # containing:
2910: # cdom - Domain on which the chat board lives
2911: # cnum - Identifier of the discussion group.
2912: # post - Body of the posting.
2913: # $client - Socket open on the client.
2914: # Returns:
2915: # 1 - Indicating caller should keep on processing.
2916: #
2917: # Side-effects:
2918: # writes a reply to the client.
2919: #
2920: #
2921: sub send_chat_handler {
2922: my ($cmd, $tail, $client) = @_;
2923:
2924:
2925: my $userinput = "$cmd:$tail";
2926:
2927: my ($cdom,$cnum,$newpost)=split(/\:/,$tail);
2928: &chat_add($cdom,$cnum,$newpost);
2929: &Reply($client, "ok\n", $userinput);
2930:
2931: return 1;
2932: }
2933: ®ister_handler("chatsend", \&send_chat_handler, 0, 1, 0);
2934: #
2935: # Retrieve the set of chat messagss from a discussion board.
2936: #
2937: # Parameters:
2938: # $cmd - Command keyword that initiated the request.
2939: # $tail - Remainder of the request after the command
2940: # keyword. In this case a colon separated list of
2941: # chat domain - Which discussion board.
2942: # chat id - Discussion thread(?)
2943: # domain/user - Authentication domain and username
2944: # of the requesting person.
2945: # $client - Socket open on the client program.
2946: # Returns:
2947: # 1 - continue processing
2948: # Side effects:
2949: # Response is written to the client.
2950: #
2951: sub retrieve_chat_handler {
2952: my ($cmd, $tail, $client) = @_;
2953:
2954:
2955: my $userinput = "$cmd:$tail";
2956:
2957: my ($cdom,$cnum,$udom,$uname)=split(/\:/,$tail);
2958: my $reply='';
2959: foreach (&get_chat($cdom,$cnum,$udom,$uname)) {
2960: $reply.=&escape($_).':';
2961: }
2962: $reply=~s/\:$//;
2963: &Reply($client, $reply."\n", $userinput);
2964:
2965:
2966: return 1;
2967: }
2968: ®ister_handler("chatretr", \&retrieve_chat_handler, 0, 1, 0);
2969:
2970: #
2971: # Initiate a query of an sql database. SQL query repsonses get put in
2972: # a file for later retrieval. This prevents sql query results from
2973: # bottlenecking the system. Note that with loncnew, perhaps this is
2974: # less of an issue since multiple outstanding requests can be concurrently
2975: # serviced.
2976: #
2977: # Parameters:
2978: # $cmd - COmmand keyword that initiated the request.
2979: # $tail - Remainder of the command after the keyword.
2980: # For this function, this consists of a query and
2981: # 3 arguments that are self-documentingly labelled
2982: # in the original arg1, arg2, arg3.
2983: # $client - Socket open on the client.
2984: # Return:
2985: # 1 - Indicating processing should continue.
2986: # Side-effects:
2987: # a reply is written to $client.
2988: #
2989: sub send_query_handler {
2990: my ($cmd, $tail, $client) = @_;
2991:
2992:
2993: my $userinput = "$cmd:$tail";
2994:
2995: my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail);
2996: $query=~s/\n*$//g;
2997: &Reply($client, "". &sql_reply("$clientname\&$query".
2998: "\&$arg1"."\&$arg2"."\&$arg3")."\n",
2999: $userinput);
3000:
3001: return 1;
3002: }
3003: ®ister_handler("querysend", \&send_query_handler, 0, 1, 0);
3004:
3005: #
3006: # Add a reply to an sql query. SQL queries are done asyncrhonously.
3007: # The query is submitted via a "querysend" transaction.
3008: # There it is passed on to the lonsql daemon, queued and issued to
3009: # mysql.
3010: # This transaction is invoked when the sql transaction is complete
3011: # it stores the query results in flie and indicates query completion.
3012: # presumably local software then fetches this response... I'm guessing
3013: # the sequence is: lonc does a querysend, we ask lonsql to do it.
3014: # lonsql on completion of the query interacts with the lond of our
3015: # client to do a query reply storing two files:
3016: # - id - The results of the query.
3017: # - id.end - Indicating the transaction completed.
3018: # NOTE: id is a unique id assigned to the query and querysend time.
3019: # Parameters:
3020: # $cmd - Command keyword that initiated this request.
3021: # $tail - Remainder of the tail. In this case that's a colon
3022: # separated list containing the query Id and the
3023: # results of the query.
3024: # $client - Socket open on the client.
3025: # Return:
3026: # 1 - Indicating that we should continue processing.
3027: # Side effects:
3028: # ok written to the client.
3029: #
3030: sub reply_query_handler {
3031: my ($cmd, $tail, $client) = @_;
3032:
3033:
3034: my $userinput = "$cmd:$tail";
3035:
3036: my ($cmd,$id,$reply)=split(/:/,$userinput);
3037: my $store;
3038: my $execdir=$perlvar{'lonDaemons'};
3039: if ($store=IO::File->new(">$execdir/tmp/$id")) {
3040: $reply=~s/\&/\n/g;
3041: print $store $reply;
3042: close $store;
3043: my $store2=IO::File->new(">$execdir/tmp/$id.end");
3044: print $store2 "done\n";
3045: close $store2;
3046: &Reply($client, "ok\n", $userinput);
3047: } else {
3048: &Failure($client, "error: ".($!+0)
3049: ." IO::File->new Failed ".
3050: "while attempting queryreply\n", $userinput);
3051: }
3052:
3053:
3054: return 1;
3055: }
3056: ®ister_handler("queryreply", \&reply_query_handler, 0, 1, 0);
3057:
3058: #
3059: # Process the courseidput request. Not quite sure what this means
3060: # at the system level sense. It appears a gdbm file in the
3061: # /home/httpd/lonUsers/$domain/nohist_courseids is tied and
3062: # a set of entries made in that database.
3063: #
3064: # Parameters:
3065: # $cmd - The command keyword that initiated this request.
3066: # $tail - Tail of the command. In this case consists of a colon
3067: # separated list contaning the domain to apply this to and
3068: # an ampersand separated list of keyword=value pairs.
3069: # $client - Socket open on the client.
3070: # Returns:
3071: # 1 - indicating that processing should continue
3072: #
3073: # Side effects:
3074: # reply is written to the client.
3075: #
3076: sub put_course_id_handler {
3077: my ($cmd, $tail, $client) = @_;
3078:
3079:
3080: my $userinput = "$cmd:$tail";
3081:
3082: my ($udom, $what) = split(/:/, $tail);
3083: chomp($what);
3084: my $now=time;
3085: my @pairs=split(/\&/,$what);
3086:
3087: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3088: if ($hashref) {
3089: foreach my $pair (@pairs) {
3090: my ($key,$value)=split(/=/,$pair);
3091: $hashref->{$key}=$value.':'.$now;
3092: }
3093: if (untie(%$hashref)) {
3094: &Reply($client, "ok\n", $userinput);
3095: } else {
3096: &Failure( $client, "error: ".($!+0)
3097: ." untie(GDBM) Failed ".
3098: "while attempting courseidput\n", $userinput);
3099: }
3100: } else {
3101: &Failure( $client, "error: ".($!+0)
3102: ." tie(GDBM) Failed ".
3103: "while attempting courseidput\n", $userinput);
3104: }
3105:
3106: return 1;
3107: }
3108: ®ister_handler("courseidput", \&put_course_id_handler, 0, 1, 0);
3109:
3110: # Retrieves the value of a course id resource keyword pattern
3111: # defined since a starting date. Both the starting date and the
3112: # keyword pattern are optional. If the starting date is not supplied it
3113: # is treated as the beginning of time. If the pattern is not found,
3114: # it is treatred as "." matching everything.
3115: #
3116: # Parameters:
3117: # $cmd - Command keyword that resulted in us being dispatched.
3118: # $tail - The remainder of the command that, in this case, consists
3119: # of a colon separated list of:
3120: # domain - The domain in which the course database is
3121: # defined.
3122: # since - Optional parameter describing the minimum
3123: # time of definition(?) of the resources that
3124: # will match the dump.
3125: # description - regular expression that is used to filter
3126: # the dump. Only keywords matching this regexp
3127: # will be used.
3128: # $client - The socket open on the client.
3129: # Returns:
3130: # 1 - Continue processing.
3131: # Side Effects:
3132: # a reply is written to $client.
3133: sub dump_course_id_handler {
3134: my ($cmd, $tail, $client) = @_;
3135:
3136: my $userinput = "$cmd:$tail";
3137:
3138: my ($udom,$since,$description) =split(/:/,$tail);
3139: if (defined($description)) {
3140: $description=&unescape($description);
3141: } else {
3142: $description='.';
3143: }
3144: unless (defined($since)) { $since=0; }
3145: my $qresult='';
3146: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
3147: if ($hashref) {
3148: while (my ($key,$value) = each(%$hashref)) {
3149: my ($descr,$lasttime,$inst_code);
3150: if ($value =~ m/^([^\:]*):([^\:]*):(\d+)$/) {
3151: ($descr,$inst_code,$lasttime)=($1,$2,$3);
3152: } else {
3153: ($descr,$lasttime) = split(/\:/,$value);
3154: }
3155: if ($lasttime<$since) { next; }
3156: if ($description eq '.') {
3157: $qresult.=$key.'='.$descr.':'.$inst_code.'&';
3158: } else {
3159: my $unescapeVal = &unescape($descr);
3160: if (eval('$unescapeVal=~/\Q$description\E/i')) {
3161: $qresult.=$key.'='.$descr.':'.$inst_code.'&';
3162: }
3163: }
3164: }
3165: if (untie(%$hashref)) {
3166: chop($qresult);
3167: &Reply($client, "$qresult\n", $userinput);
3168: } else {
3169: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3170: "while attempting courseiddump\n", $userinput);
3171: }
3172: } else {
3173: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3174: "while attempting courseiddump\n", $userinput);
3175: }
3176:
3177:
3178: return 1;
3179: }
3180: ®ister_handler("courseiddump", \&dump_course_id_handler, 0, 1, 0);
1.238 foxr 3181:
3182: #
3183: # Puts an id to a domains id database.
3184: #
3185: # Parameters:
3186: # $cmd - The command that triggered us.
3187: # $tail - Remainder of the request other than the command. This is a
3188: # colon separated list containing:
3189: # $domain - The domain for which we are writing the id.
3190: # $pairs - The id info to write... this is and & separated list
3191: # of keyword=value.
3192: # $client - Socket open on the client.
3193: # Returns:
3194: # 1 - Continue processing.
3195: # Side effects:
3196: # reply is written to $client.
3197: #
3198: sub put_id_handler {
3199: my ($cmd,$tail,$client) = @_;
3200:
3201:
3202: my $userinput = "$cmd:$tail";
3203:
3204: my ($udom,$what)=split(/:/,$tail);
3205: chomp($what);
3206: my @pairs=split(/\&/,$what);
3207: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
3208: "P", $what);
3209: if ($hashref) {
3210: foreach my $pair (@pairs) {
3211: my ($key,$value)=split(/=/,$pair);
3212: $hashref->{$key}=$value;
3213: }
3214: if (untie(%$hashref)) {
3215: &Reply($client, "ok\n", $userinput);
3216: } else {
3217: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
3218: "while attempting idput\n", $userinput);
3219: }
3220: } else {
3221: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
3222: "while attempting idput\n", $userinput);
3223: }
3224:
3225: return 1;
3226: }
3227:
3228: ®ister_handler("idput", \&put_id_handler, 0, 1, 0);
3229: #
3230: # Retrieves a set of id values from the id database.
3231: # Returns an & separated list of results, one for each requested id to the
3232: # client.
3233: #
3234: # Parameters:
3235: # $cmd - Command keyword that caused us to be dispatched.
3236: # $tail - Tail of the command. Consists of a colon separated:
3237: # domain - the domain whose id table we dump
3238: # ids Consists of an & separated list of
3239: # id keywords whose values will be fetched.
3240: # nonexisting keywords will have an empty value.
3241: # $client - Socket open on the client.
3242: #
3243: # Returns:
3244: # 1 - indicating processing should continue.
3245: # Side effects:
3246: # An & separated list of results is written to $client.
3247: #
3248: sub get_id_handler {
3249: my ($cmd, $tail, $client) = @_;
3250:
3251:
3252: my $userinput = "$client:$tail";
3253:
3254: my ($udom,$what)=split(/:/,$tail);
3255: chomp($what);
3256: my @queries=split(/\&/,$what);
3257: my $qresult='';
3258: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_READER());
3259: if ($hashref) {
3260: for (my $i=0;$i<=$#queries;$i++) {
3261: $qresult.="$hashref->{$queries[$i]}&";
3262: }
3263: if (untie(%$hashref)) {
3264: $qresult=~s/\&$//;
3265: &Reply($client, "$qresult\n", $userinput);
3266: } else {
3267: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
3268: "while attempting idget\n",$userinput);
3269: }
3270: } else {
3271: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
3272: "while attempting idget\n",$userinput);
3273: }
3274:
3275: return 1;
3276: }
3277:
3278: register_handler("idget", \&get_id_handler, 0, 1, 0);
3279:
3280: #
3281: # Process the tmpput command I'm not sure what this does.. Seems to
3282: # create a file in the lonDaemons/tmp directory of the form $id.tmp
3283: # where Id is the client's ip concatenated with a sequence number.
3284: # The file will contain some value that is passed in. Is this e.g.
3285: # a login token?
3286: #
3287: # Parameters:
3288: # $cmd - The command that got us dispatched.
3289: # $tail - The remainder of the request following $cmd:
3290: # In this case this will be the contents of the file.
3291: # $client - Socket connected to the client.
3292: # Returns:
3293: # 1 indicating processing can continue.
3294: # Side effects:
3295: # A file is created in the local filesystem.
3296: # A reply is sent to the client.
3297: sub tmp_put_handler {
3298: my ($cmd, $what, $client) = @_;
3299:
3300: my $userinput = "$cmd:$what"; # Reconstruct for logging.
3301:
3302:
3303: my $store;
3304: $tmpsnum++;
3305: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
3306: $id=~s/\W/\_/g;
3307: $what=~s/\n//g;
3308: my $execdir=$perlvar{'lonDaemons'};
3309: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
3310: print $store $what;
3311: close $store;
3312: &Reply($client, "$id\n", $userinput);
3313: } else {
3314: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
3315: "while attempting tmpput\n", $userinput);
3316: }
3317: return 1;
3318:
3319: }
3320: ®ister_handler("tmpput", \&tmp_put_handler, 0, 1, 0);
3321: # Processes the tmpget command. This command returns the contents
3322: # of a temporary resource file(?) created via tmpput.
3323: #
3324: # Paramters:
3325: # $cmd - Command that got us dispatched.
3326: # $id - Tail of the command, contain the id of the resource
3327: # we want to fetch.
3328: # $client - socket open on the client.
3329: # Return:
3330: # 1 - Inidcating processing can continue.
3331: # Side effects:
3332: # A reply is sent to the client.
3333:
3334: #
3335: sub tmp_get_handler {
3336: my ($cmd, $id, $client) = @_;
3337:
3338: my $userinput = "$cmd:$id";
3339:
3340:
3341: $id=~s/\W/\_/g;
3342: my $store;
3343: my $execdir=$perlvar{'lonDaemons'};
3344: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
3345: my $reply=<$store>;
3346: &Reply( $client, "$reply\n", $userinput);
3347: close $store;
3348: } else {
3349: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
3350: "while attempting tmpget\n", $userinput);
3351: }
3352:
3353: return 1;
3354: }
3355: ®ister_handler("tmpget", \&tmp_get_handler, 0, 1, 0);
3356: #
3357: # Process the tmpdel command. This command deletes a temp resource
3358: # created by the tmpput command.
3359: #
3360: # Parameters:
3361: # $cmd - Command that got us here.
3362: # $id - Id of the temporary resource created.
3363: # $client - socket open on the client process.
3364: #
3365: # Returns:
3366: # 1 - Indicating processing should continue.
3367: # Side Effects:
3368: # A file is deleted
3369: # A reply is sent to the client.
3370: sub tmp_del_handler {
3371: my ($cmd, $id, $client) = @_;
3372:
3373: my $userinput= "$cmd:$id";
3374:
3375: chomp($id);
3376: $id=~s/\W/\_/g;
3377: my $execdir=$perlvar{'lonDaemons'};
3378: if (unlink("$execdir/tmp/$id.tmp")) {
3379: &Reply($client, "ok\n", $userinput);
3380: } else {
3381: &Failure( $client, "error: ".($!+0)."Unlink tmp Failed ".
3382: "while attempting tmpdel\n", $userinput);
3383: }
3384:
3385: return 1;
3386:
3387: }
3388: ®ister_handler("tmpdel", \&tmp_del_handler, 0, 1, 0);
3389: #
1.246 foxr 3390: # Processes the setannounce command. This command
3391: # creates a file named announce.txt in the top directory of
3392: # the documentn root and sets its contents. The announce.txt file is
3393: # printed in its entirety at the LonCAPA login page. Note:
3394: # once the announcement.txt fileis created it cannot be deleted.
3395: # However, setting the contents of the file to empty removes the
3396: # announcement from the login page of loncapa so who cares.
3397: #
3398: # Parameters:
3399: # $cmd - The command that got us dispatched.
3400: # $announcement - The text of the announcement.
3401: # $client - Socket open on the client process.
3402: # Retunrns:
3403: # 1 - Indicating request processing should continue
3404: # Side Effects:
3405: # The file {DocRoot}/announcement.txt is created.
3406: # A reply is sent to $client.
3407: #
3408: sub set_announce_handler {
3409: my ($cmd, $announcement, $client) = @_;
3410:
3411: my $userinput = "$cmd:$announcement";
3412:
3413: chomp($announcement);
3414: $announcement=&unescape($announcement);
3415: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
3416: '/announcement.txt')) {
3417: print $store $announcement;
3418: close $store;
3419: &Reply($client, "ok\n", $userinput);
3420: } else {
3421: &Failure($client, "error: ".($!+0)."\n", $userinput);
3422: }
3423:
3424: return 1;
3425: }
3426: ®ister_handler("setannounce", \&set_announce_handler, 0, 1, 0);
3427: #
3428: # Return the version of the daemon. This can be used to determine
3429: # the compatibility of cross version installations or, alternatively to
3430: # simply know who's out of date and who isn't. Note that the version
3431: # is returned concatenated with the tail.
3432: # Parameters:
3433: # $cmd - the request that dispatched to us.
3434: # $tail - Tail of the request (client's version?).
3435: # $client - Socket open on the client.
3436: #Returns:
3437: # 1 - continue processing requests.
3438: # Side Effects:
3439: # Replies with version to $client.
3440: sub get_version_handler {
3441: my ($cmd, $tail, $client) = @_;
3442:
3443: my $userinput = $cmd.$tail;
3444:
3445: &Reply($client, &version($userinput)."\n", $userinput);
3446:
3447:
3448: return 1;
3449: }
3450: ®ister_handler("version", \&get_version_handler, 0, 1, 0);
3451: # Set the current host and domain. This is used to support
3452: # multihomed systems. Each IP of the system, or even separate daemons
3453: # on the same IP can be treated as handling a separate lonCAPA virtual
3454: # machine. This command selects the virtual lonCAPA. The client always
3455: # knows the right one since it is lonc and it is selecting the domain/system
3456: # from the hosts.tab file.
3457: # Parameters:
3458: # $cmd - Command that dispatched us.
3459: # $tail - Tail of the command (domain/host requested).
3460: # $socket - Socket open on the client.
3461: #
3462: # Returns:
3463: # 1 - Indicates the program should continue to process requests.
3464: # Side-effects:
3465: # The default domain/system context is modified for this daemon.
3466: # a reply is sent to the client.
3467: #
3468: sub set_virtual_host_handler {
3469: my ($cmd, $tail, $socket) = @_;
3470:
3471: my $userinput ="$cmd:$tail";
3472:
3473: &Reply($client, &sethost($userinput)."\n", $userinput);
3474:
3475:
3476: return 1;
3477: }
1.247 albertel 3478: ®ister_handler("sethost", \&set_virtual_host_handler, 0, 1, 0);
1.246 foxr 3479:
3480: # Process a request to exit:
3481: # - "bye" is sent to the client.
3482: # - The client socket is shutdown and closed.
3483: # - We indicate to the caller that we should exit.
3484: # Formal Parameters:
3485: # $cmd - The command that got us here.
3486: # $tail - Tail of the command (empty).
3487: # $client - Socket open on the tail.
3488: # Returns:
3489: # 0 - Indicating the program should exit!!
3490: #
3491: sub exit_handler {
3492: my ($cmd, $tail, $client) = @_;
3493:
3494: my $userinput = "$cmd:$tail";
3495:
3496: &logthis("Client $clientip ($clientname) hanging up: $userinput");
3497: &Reply($client, "bye\n", $userinput);
3498: $client->shutdown(2); # shutdown the socket forcibly.
3499: $client->close();
3500:
3501: return 0;
3502: }
1.248 foxr 3503: ®ister_handler("exit", \&exit_handler, 0,1,1);
3504: ®ister_handler("init", \&exit_handler, 0,1,1);
3505: ®ister_handler("quit", \&exit_handler, 0,1,1);
3506:
3507: # Determine if auto-enrollment is enabled.
3508: # Note that the original had what I believe to be a defect.
3509: # The original returned 0 if the requestor was not a registerd client.
3510: # It should return "refused".
3511: # Formal Parameters:
3512: # $cmd - The command that invoked us.
3513: # $tail - The tail of the command (Extra command parameters.
3514: # $client - The socket open on the client that issued the request.
3515: # Returns:
3516: # 1 - Indicating processing should continue.
3517: #
3518: sub enrollment_enabled_handler {
3519: my ($cmd, $tail, $client) = @_;
3520: my $userinput = $cmd.":".$tail; # For logging purposes.
3521:
3522:
3523: my $cdom = split(/:/, $tail); # Domain we're asking about.
3524: my $outcome = &localenroll::run($cdom);
3525: &Reply($client, "$outcome\n", $userinput);
3526:
3527: return 1;
3528: }
3529: ®ister_handler("autorun", \&enrollment_enabled_handler, 0, 1, 0);
3530:
3531: # Get the official sections for which auto-enrollment is possible.
3532: # Since the admin people won't know about 'unofficial sections'
3533: # we cannot auto-enroll on them.
3534: # Formal Parameters:
3535: # $cmd - The command request that got us dispatched here.
3536: # $tail - The remainder of the request. In our case this
3537: # will be split into:
3538: # $coursecode - The course name from the admin point of view.
3539: # $cdom - The course's domain(?).
3540: # $client - Socket open on the client.
3541: # Returns:
3542: # 1 - Indiciting processing should continue.
3543: #
3544: sub get_sections_handler {
3545: my ($cmd, $tail, $client) = @_;
3546: my $userinput = "$cmd:$tail";
3547:
3548: my ($coursecode, $cdom) = split(/:/, $tail);
3549: my @secs = &localenroll::get_sections($coursecode,$cdom);
3550: my $seclist = &escape(join(':',@secs));
3551:
3552: &Reply($client, "$seclist\n", $userinput);
3553:
3554:
3555: return 1;
3556: }
3557: ®ister_handler("autogetsections", \&get_sections_handler, 0, 1, 0);
3558:
3559: # Validate the owner of a new course section.
3560: #
3561: # Formal Parameters:
3562: # $cmd - Command that got us dispatched.
3563: # $tail - the remainder of the command. For us this consists of a
3564: # colon separated string containing:
3565: # $inst - Course Id from the institutions point of view.
3566: # $owner - Proposed owner of the course.
3567: # $cdom - Domain of the course (from the institutions
3568: # point of view?)..
3569: # $client - Socket open on the client.
3570: #
3571: # Returns:
3572: # 1 - Processing should continue.
3573: #
3574: sub validate_course_owner_handler {
3575: my ($cmd, $tail, $client) = @_;
3576: my $userinput = "$cmd:$tail";
3577: my ($inst_course_id, $owner, $cdom) = split(/:/, $tail);
3578:
3579: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom);
3580: &Reply($client, "$outcome\n", $userinput);
3581:
3582:
3583:
3584: return 1;
3585: }
3586: ®ister_handler("autonewcourse", \&validate_course_owner_handler, 0, 1, 0);
3587: #
3588: # Validate a course section in the official schedule of classes
3589: # from the institutions point of view (part of autoenrollment).
3590: #
3591: # Formal Parameters:
3592: # $cmd - The command request that got us dispatched.
3593: # $tail - The tail of the command. In this case,
3594: # this is a colon separated set of words that will be split
3595: # into:
3596: # $inst_course_id - The course/section id from the
3597: # institutions point of view.
3598: # $cdom - The domain from the institutions
3599: # point of view.
3600: # $client - Socket open on the client.
3601: # Returns:
3602: # 1 - Indicating processing should continue.
3603: #
3604: sub validate_course_section_handler {
3605: my ($cmd, $tail, $client) = @_;
3606: my $userinput = "$cmd:$tail";
3607: my ($inst_course_id, $cdom) = split(/:/, $tail);
3608:
3609: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
3610: &Reply($client, "$outcome\n", $userinput);
3611:
3612:
3613: return 1;
3614: }
3615: ®ister_handler("autovalidatecourse", \&validate_course_section_handler, 0, 1, 0);
3616:
3617: #
3618: # Create a password for a new auto-enrollment user.
3619: # I think/guess, this password allows access to the institutions
3620: # AIS class list server/services. Stuart can correct this comment
3621: # when he finds out how wrong I am.
3622: #
3623: # Formal Parameters:
3624: # $cmd - The command request that got us dispatched.
3625: # $tail - The tail of the command. In this case this is a colon separated
3626: # set of words that will be split into:
3627: # $authparam - An authentication parameter (username??).
3628: # $cdom - The domain of the course from the institution's
3629: # point of view.
3630: # $client - The socket open on the client.
3631: # Returns:
3632: # 1 - continue processing.
3633: #
3634: sub create_auto_enroll_password_handler {
3635: my ($cmd, $tail, $client) = @_;
3636: my $userinput = "$cmd:$tail";
3637:
3638: my ($authparam, $cdom) = split(/:/, $userinput);
3639:
3640: my ($create_passwd,$authchk);
3641: ($authparam,
3642: $create_passwd,
3643: $authchk) = &localenroll::create_password($authparam,$cdom);
3644:
3645: &Reply($client, &escape($authparam.':'.$create_passwd.':'.$authchk)."\n",
3646: $userinput);
3647:
3648:
3649: return 1;
3650: }
3651: ®ister_handler("autocreatepassword", \&create_auto_enroll_password_handler,
3652: 0, 1, 0);
3653:
3654: # Retrieve and remove temporary files created by/during autoenrollment.
3655: #
3656: # Formal Parameters:
3657: # $cmd - The command that got us dispatched.
3658: # $tail - The tail of the command. In our case this is a colon
3659: # separated list that will be split into:
3660: # $filename - The name of the file to remove.
3661: # The filename is given as a path relative to
3662: # the LonCAPA temp file directory.
3663: # $client - Socket open on the client.
3664: #
3665: # Returns:
3666: # 1 - Continue processing.
3667:
3668: sub retrieve_auto_file_handler {
3669: my ($cmd, $tail, $client) = @_;
3670: my $userinput = "cmd:$tail";
3671:
3672: my ($filename) = split(/:/, $tail);
3673:
3674: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
3675: if ( (-e $source) && ($filename ne '') ) {
3676: my $reply = '';
3677: if (open(my $fh,$source)) {
3678: while (<$fh>) {
3679: chomp($_);
3680: $_ =~ s/^\s+//g;
3681: $_ =~ s/\s+$//g;
3682: $reply .= $_;
3683: }
3684: close($fh);
3685: &Reply($client, &escape($reply)."\n", $userinput);
3686:
3687: # Does this have to be uncommented??!? (RF).
3688: #
3689: # unlink($source);
3690: } else {
3691: &Failure($client, "error\n", $userinput);
3692: }
3693: } else {
3694: &Failure($client, "error\n", $userinput);
3695: }
3696:
3697:
3698: return 1;
3699: }
3700: ®ister_handler("autoretrieve", \&retrieve_auto_file_handler, 0,1,0);
3701:
3702: #
3703: # Read and retrieve institutional code format (for support form).
3704: # Formal Parameters:
3705: # $cmd - Command that dispatched us.
3706: # $tail - Tail of the command. In this case it conatins
3707: # the course domain and the coursename.
3708: # $client - Socket open on the client.
3709: # Returns:
3710: # 1 - Continue processing.
3711: #
3712: sub get_institutional_code_format_handler {
3713: my ($cmd, $tail, $client) = @_;
3714: my $userinput = "$cmd:$tail";
3715:
3716: my $reply;
3717: my($cdom,$course) = split(/:/,$tail);
3718: my @pairs = split/\&/,$course;
3719: my %instcodes = ();
3720: my %codes = ();
3721: my @codetitles = ();
3722: my %cat_titles = ();
3723: my %cat_order = ();
3724: foreach (@pairs) {
3725: my ($key,$value) = split/=/,$_;
3726: $instcodes{&unescape($key)} = &unescape($value);
3727: }
3728: my $formatreply = &localenroll::instcode_format($cdom,
3729: \%instcodes,
3730: \%codes,
3731: \@codetitles,
3732: \%cat_titles,
3733: \%cat_order);
3734: if ($formatreply eq 'ok') {
3735: my $codes_str = &hash2str(%codes);
3736: my $codetitles_str = &array2str(@codetitles);
3737: my $cat_titles_str = &hash2str(%cat_titles);
3738: my $cat_order_str = &hash2str(%cat_order);
3739: &Reply($client,
3740: $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'
3741: .$cat_order_str."\n",
3742: $userinput);
3743: } else {
3744: # this else branch added by RF since if not ok, lonc will
3745: # hang waiting on reply until timeout.
3746: #
3747: &Reply($client, "format_error\n", $userinput);
3748: }
3749:
3750: return 1;
3751: }
1.246 foxr 3752:
1.248 foxr 3753: ®ister_handler("autoinstcodeformat", \&get_institutional_code_format_handler,
3754: 0,1,0);
1.246 foxr 3755:
3756: #
3757: #
1.234 foxr 3758: #
1.231 foxr 3759: #
3760: #
1.207 foxr 3761: #---------------------------------------------------------------
3762: #
3763: # Getting, decoding and dispatching requests:
3764: #
3765:
3766: #
3767: # Get a Request:
3768: # Gets a Request message from the client. The transaction
3769: # is defined as a 'line' of text. We remove the new line
3770: # from the text line.
1.226 foxr 3771: #
1.211 albertel 3772: sub get_request {
1.207 foxr 3773: my $input = <$client>;
3774: chomp($input);
1.226 foxr 3775:
1.234 foxr 3776: &Debug("get_request: Request = $input\n");
1.207 foxr 3777:
3778: &status('Processing '.$clientname.':'.$input);
3779:
3780: return $input;
3781: }
1.212 foxr 3782: #---------------------------------------------------------------
3783: #
3784: # Process a request. This sub should shrink as each action
3785: # gets farmed out into a separat sub that is registered
3786: # with the dispatch hash.
3787: #
3788: # Parameters:
3789: # user_input - The request received from the client (lonc).
3790: # Returns:
3791: # true to keep processing, false if caller should exit.
3792: #
3793: sub process_request {
3794: my ($userinput) = @_; # Easier for now to break style than to
3795: # fix all the userinput -> user_input.
3796: my $wasenc = 0; # True if request was encrypted.
3797: # ------------------------------------------------------------ See if encrypted
3798: if ($userinput =~ /^enc/) {
3799: $userinput = decipher($userinput);
3800: $wasenc=1;
3801: if(!$userinput) { # Cipher not defined.
3802: &Failure($client, "error: Encrypted data without negotated key");
3803: return 0;
3804: }
3805: }
3806: Debug("process_request: $userinput\n");
3807:
1.213 foxr 3808: #
3809: # The 'correct way' to add a command to lond is now to
3810: # write a sub to execute it and Add it to the command dispatch
3811: # hash via a call to register_handler.. The comments to that
3812: # sub should give you enough to go on to show how to do this
3813: # along with the examples that are building up as this code
3814: # is getting refactored. Until all branches of the
3815: # if/elseif monster below have been factored out into
3816: # separate procesor subs, if the dispatch hash is missing
3817: # the command keyword, we will fall through to the remainder
3818: # of the if/else chain below in order to keep this thing in
3819: # working order throughout the transmogrification.
3820:
3821: my ($command, $tail) = split(/:/, $userinput, 2);
3822: chomp($command);
3823: chomp($tail);
3824: $tail =~ s/(\r)//; # This helps people debugging with e.g. telnet.
1.214 foxr 3825: $command =~ s/(\r)//; # And this too for parameterless commands.
3826: if(!$tail) {
3827: $tail =""; # defined but blank.
3828: }
1.213 foxr 3829:
3830: &Debug("Command received: $command, encoded = $wasenc");
3831:
3832: if(defined $Dispatcher{$command}) {
3833:
3834: my $dispatch_info = $Dispatcher{$command};
3835: my $handler = $$dispatch_info[0];
3836: my $need_encode = $$dispatch_info[1];
3837: my $client_types = $$dispatch_info[2];
3838: Debug("Matched dispatch hash: mustencode: $need_encode "
3839: ."ClientType $client_types");
3840:
3841: # Validate the request:
3842:
3843: my $ok = 1;
3844: my $requesterprivs = 0;
3845: if(&isClient()) {
3846: $requesterprivs |= $CLIENT_OK;
3847: }
3848: if(&isManager()) {
3849: $requesterprivs |= $MANAGER_OK;
3850: }
3851: if($need_encode && (!$wasenc)) {
3852: Debug("Must encode but wasn't: $need_encode $wasenc");
3853: $ok = 0;
3854: }
3855: if(($client_types & $requesterprivs) == 0) {
3856: Debug("Client not privileged to do this operation");
3857: $ok = 0;
3858: }
3859:
3860: if($ok) {
3861: Debug("Dispatching to handler $command $tail");
3862: my $keep_going = &$handler($command, $tail, $client);
3863: return $keep_going;
3864: } else {
3865: Debug("Refusing to dispatch because client did not match requirements");
3866: Failure($client, "refused\n", $userinput);
3867: return 1;
3868: }
3869:
3870: }
3871:
1.215 foxr 3872: #------------------- Commands not yet in spearate handlers. --------------
3873:
1.212 foxr 3874: #------------------------------- is auto-enrollment enabled?
1.246 foxr 3875: if ($userinput =~/^autorun/) {
1.212 foxr 3876: if (isClient) {
3877: my ($cmd,$cdom) = split(/:/,$userinput);
3878: my $outcome = &localenroll::run($cdom);
3879: print $client "$outcome\n";
3880: } else {
3881: print $client "0\n";
3882: }
3883: #------------------------------- get official sections (for auto-enrollment).
1.231 foxr 3884: } elsif ($userinput =~/^autogetsections/) {
1.212 foxr 3885: if (isClient) {
3886: my ($cmd,$coursecode,$cdom)=split(/:/,$userinput);
3887: my @secs = &localenroll::get_sections($coursecode,$cdom);
3888: my $seclist = &escape(join(':',@secs));
3889: print $client "$seclist\n";
3890: } else {
3891: print $client "refused\n";
3892: }
3893: #----------------------- validate owner of new course section (for auto-enrollment).
1.231 foxr 3894: } elsif ($userinput =~/^autonewcourse/) {
1.212 foxr 3895: if (isClient) {
3896: my ($cmd,$inst_course_id,$owner,$cdom)=split(/:/,$userinput);
3897: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom);
3898: print $client "$outcome\n";
3899: } else {
3900: print $client "refused\n";
3901: }
3902: #-------------- validate course section in schedule of classes (for auto-enrollment).
1.231 foxr 3903: } elsif ($userinput =~/^autovalidatecourse/) {
1.212 foxr 3904: if (isClient) {
3905: my ($cmd,$inst_course_id,$cdom)=split(/:/,$userinput);
3906: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
3907: print $client "$outcome\n";
3908: } else {
3909: print $client "refused\n";
3910: }
3911: #--------------------------- create password for new user (for auto-enrollment).
1.231 foxr 3912: } elsif ($userinput =~/^autocreatepassword/) {
1.212 foxr 3913: if (isClient) {
3914: my ($cmd,$authparam,$cdom)=split(/:/,$userinput);
3915: my ($create_passwd,$authchk);
3916: ($authparam,$create_passwd,$authchk) = &localenroll::create_password($authparam,$cdom);
3917: print $client &escape($authparam.':'.$create_passwd.':'.$authchk)."\n";
3918: } else {
3919: print $client "refused\n";
3920: }
3921: #--------------------------- read and remove temporary files (for auto-enrollment).
1.231 foxr 3922: } elsif ($userinput =~/^autoretrieve/) {
1.212 foxr 3923: if (isClient) {
3924: my ($cmd,$filename) = split(/:/,$userinput);
3925: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
3926: if ( (-e $source) && ($filename ne '') ) {
3927: my $reply = '';
3928: if (open(my $fh,$source)) {
3929: while (<$fh>) {
3930: chomp($_);
3931: $_ =~ s/^\s+//g;
3932: $_ =~ s/\s+$//g;
3933: $reply .= $_;
3934: }
3935: close($fh);
3936: print $client &escape($reply)."\n";
3937: # unlink($source);
3938: } else {
3939: print $client "error\n";
3940: }
3941: } else {
3942: print $client "error\n";
3943: }
3944: } else {
3945: print $client "refused\n";
3946: }
1.248 foxr 3947: #--------------------- read and retrieve institutional code format
3948: # (for support form).
1.231 foxr 3949: } elsif ($userinput =~/^autoinstcodeformat/) {
1.212 foxr 3950: if (isClient) {
3951: my $reply;
3952: my($cmd,$cdom,$course) = split(/:/,$userinput);
3953: my @pairs = split/\&/,$course;
3954: my %instcodes = ();
3955: my %codes = ();
3956: my @codetitles = ();
3957: my %cat_titles = ();
3958: my %cat_order = ();
3959: foreach (@pairs) {
3960: my ($key,$value) = split/=/,$_;
3961: $instcodes{&unescape($key)} = &unescape($value);
3962: }
3963: my $formatreply = &localenroll::instcode_format($cdom,\%instcodes,\%codes,\@codetitles,\%cat_titles,\%cat_order);
3964: if ($formatreply eq 'ok') {
3965: my $codes_str = &hash2str(%codes);
3966: my $codetitles_str = &array2str(@codetitles);
3967: my $cat_titles_str = &hash2str(%cat_titles);
3968: my $cat_order_str = &hash2str(%cat_order);
3969: print $client $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'.$cat_order_str."\n";
3970: }
3971: } else {
3972: print $client "refused\n";
3973: }
3974: # ------------------------------------------------------------- unknown command
3975:
3976: } else {
3977: # unknown command
3978: print $client "unknown_cmd\n";
3979: }
3980: # -------------------------------------------------------------------- complete
3981: Debug("process_request - returning 1");
3982: return 1;
3983: }
1.207 foxr 3984: #
3985: # Decipher encoded traffic
3986: # Parameters:
3987: # input - Encoded data.
3988: # Returns:
3989: # Decoded data or undef if encryption key was not yet negotiated.
3990: # Implicit input:
3991: # cipher - This global holds the negotiated encryption key.
3992: #
1.211 albertel 3993: sub decipher {
1.207 foxr 3994: my ($input) = @_;
3995: my $output = '';
1.212 foxr 3996:
3997:
1.207 foxr 3998: if($cipher) {
3999: my($enc, $enclength, $encinput) = split(/:/, $input);
4000: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
4001: $output .=
4002: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
4003: }
4004: return substr($output, 0, $enclength);
4005: } else {
4006: return undef;
4007: }
4008: }
4009:
4010: #
4011: # Register a command processor. This function is invoked to register a sub
4012: # to process a request. Once registered, the ProcessRequest sub can automatically
4013: # dispatch requests to an appropriate sub, and do the top level validity checking
4014: # as well:
4015: # - Is the keyword recognized.
4016: # - Is the proper client type attempting the request.
4017: # - Is the request encrypted if it has to be.
4018: # Parameters:
4019: # $request_name - Name of the request being registered.
4020: # This is the command request that will match
4021: # against the hash keywords to lookup the information
4022: # associated with the dispatch information.
4023: # $procedure - Reference to a sub to call to process the request.
4024: # All subs get called as follows:
4025: # Procedure($cmd, $tail, $replyfd, $key)
4026: # $cmd - the actual keyword that invoked us.
4027: # $tail - the tail of the request that invoked us.
4028: # $replyfd- File descriptor connected to the client
4029: # $must_encode - True if the request must be encoded to be good.
4030: # $client_ok - True if it's ok for a client to request this.
4031: # $manager_ok - True if it's ok for a manager to request this.
4032: # Side effects:
4033: # - On success, the Dispatcher hash has an entry added for the key $RequestName
4034: # - On failure, the program will die as it's a bad internal bug to try to
4035: # register a duplicate command handler.
4036: #
1.211 albertel 4037: sub register_handler {
1.212 foxr 4038: my ($request_name,$procedure,$must_encode, $client_ok,$manager_ok) = @_;
1.207 foxr 4039:
4040: # Don't allow duplication#
4041:
4042: if (defined $Dispatcher{$request_name}) {
4043: die "Attempting to define a duplicate request handler for $request_name\n";
4044: }
4045: # Build the client type mask:
4046:
4047: my $client_type_mask = 0;
4048: if($client_ok) {
4049: $client_type_mask |= $CLIENT_OK;
4050: }
4051: if($manager_ok) {
4052: $client_type_mask |= $MANAGER_OK;
4053: }
4054:
4055: # Enter the hash:
4056:
4057: my @entry = ($procedure, $must_encode, $client_type_mask);
4058:
4059: $Dispatcher{$request_name} = \@entry;
4060:
4061: }
4062:
4063:
4064: #------------------------------------------------------------------
4065:
4066:
4067:
4068:
1.141 foxr 4069: #
1.96 foxr 4070: # Convert an error return code from lcpasswd to a string value.
4071: #
4072: sub lcpasswdstrerror {
4073: my $ErrorCode = shift;
1.97 foxr 4074: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
1.96 foxr 4075: return "lcpasswd Unrecognized error return value ".$ErrorCode;
4076: } else {
1.98 foxr 4077: return $passwderrors[$ErrorCode];
1.96 foxr 4078: }
4079: }
4080:
1.97 foxr 4081: #
4082: # Convert an error return code from lcuseradd to a string value:
4083: #
4084: sub lcuseraddstrerror {
4085: my $ErrorCode = shift;
4086: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
4087: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
4088: } else {
1.98 foxr 4089: return $adderrors[$ErrorCode];
1.97 foxr 4090: }
4091: }
4092:
1.23 harris41 4093: # grabs exception and records it to log before exiting
4094: sub catchexception {
1.27 albertel 4095: my ($error)=@_;
1.25 www 4096: $SIG{'QUIT'}='DEFAULT';
4097: $SIG{__DIE__}='DEFAULT';
1.165 albertel 4098: &status("Catching exception");
1.190 albertel 4099: &logthis("<font color='red'>CRITICAL: "
1.134 albertel 4100: ."ABNORMAL EXIT. Child $$ for server $thisserver died through "
1.27 albertel 4101: ."a crash with this error msg->[$error]</font>");
1.57 www 4102: &logthis('Famous last words: '.$status.' - '.$lastlog);
1.27 albertel 4103: if ($client) { print $client "error: $error\n"; }
1.59 www 4104: $server->close();
1.27 albertel 4105: die($error);
1.23 harris41 4106: }
1.63 www 4107: sub timeout {
1.165 albertel 4108: &status("Handling Timeout");
1.190 albertel 4109: &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
1.63 www 4110: &catchexception('Timeout');
4111: }
1.22 harris41 4112: # -------------------------------- Set signal handlers to record abnormal exits
4113:
1.226 foxr 4114:
1.22 harris41 4115: $SIG{'QUIT'}=\&catchexception;
4116: $SIG{__DIE__}=\&catchexception;
4117:
1.81 matthew 4118: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
1.95 harris41 4119: &status("Read loncapa.conf and loncapa_apache.conf");
4120: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
1.141 foxr 4121: %perlvar=%{$perlvarref};
1.80 harris41 4122: undef $perlvarref;
1.19 www 4123:
1.35 harris41 4124: # ----------------------------- Make sure this process is running from user=www
4125: my $wwwid=getpwnam('www');
4126: if ($wwwid!=$<) {
1.134 albertel 4127: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
4128: my $subj="LON: $currenthostid User ID mismatch";
1.37 harris41 4129: system("echo 'User ID mismatch. lond must be run as user www.' |\
1.35 harris41 4130: mailto $emailto -s '$subj' > /dev/null");
4131: exit 1;
4132: }
4133:
1.19 www 4134: # --------------------------------------------- Check if other instance running
4135:
4136: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
4137:
4138: if (-e $pidfile) {
4139: my $lfh=IO::File->new("$pidfile");
4140: my $pide=<$lfh>;
4141: chomp($pide);
1.29 harris41 4142: if (kill 0 => $pide) { die "already running"; }
1.19 www 4143: }
1.1 albertel 4144:
4145: # ------------------------------------------------------------- Read hosts file
4146:
4147:
4148:
4149: # establish SERVER socket, bind and listen.
4150: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
4151: Type => SOCK_STREAM,
4152: Proto => 'tcp',
4153: Reuse => 1,
4154: Listen => 10 )
1.29 harris41 4155: or die "making socket: $@\n";
1.1 albertel 4156:
4157: # --------------------------------------------------------- Do global variables
4158:
4159: # global variables
4160:
1.134 albertel 4161: my %children = (); # keys are current child process IDs
1.1 albertel 4162:
4163: sub REAPER { # takes care of dead children
4164: $SIG{CHLD} = \&REAPER;
1.165 albertel 4165: &status("Handling child death");
1.178 foxr 4166: my $pid;
4167: do {
4168: $pid = waitpid(-1,&WNOHANG());
4169: if (defined($children{$pid})) {
4170: &logthis("Child $pid died");
4171: delete($children{$pid});
1.183 albertel 4172: } elsif ($pid > 0) {
1.178 foxr 4173: &logthis("Unknown Child $pid died");
4174: }
4175: } while ( $pid > 0 );
4176: foreach my $child (keys(%children)) {
4177: $pid = waitpid($child,&WNOHANG());
4178: if ($pid > 0) {
4179: &logthis("Child $child - $pid looks like we missed it's death");
4180: delete($children{$pid});
4181: }
1.176 albertel 4182: }
1.165 albertel 4183: &status("Finished Handling child death");
1.1 albertel 4184: }
4185:
4186: sub HUNTSMAN { # signal handler for SIGINT
1.165 albertel 4187: &status("Killing children (INT)");
1.1 albertel 4188: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
4189: kill 'INT' => keys %children;
1.59 www 4190: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.1 albertel 4191: my $execdir=$perlvar{'lonDaemons'};
4192: unlink("$execdir/logs/lond.pid");
1.190 albertel 4193: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
1.165 albertel 4194: &status("Done killing children");
1.1 albertel 4195: exit; # clean up with dignity
4196: }
4197:
4198: sub HUPSMAN { # signal handler for SIGHUP
4199: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
1.165 albertel 4200: &status("Killing children for restart (HUP)");
1.1 albertel 4201: kill 'INT' => keys %children;
1.59 www 4202: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.190 albertel 4203: &logthis("<font color='red'>CRITICAL: Restarting</font>");
1.134 albertel 4204: my $execdir=$perlvar{'lonDaemons'};
1.30 harris41 4205: unlink("$execdir/logs/lond.pid");
1.165 albertel 4206: &status("Restarting self (HUP)");
1.1 albertel 4207: exec("$execdir/lond"); # here we go again
4208: }
4209:
1.144 foxr 4210: #
1.148 foxr 4211: # Kill off hashes that describe the host table prior to re-reading it.
4212: # Hashes affected are:
1.200 matthew 4213: # %hostid, %hostdom %hostip %hostdns.
1.148 foxr 4214: #
4215: sub KillHostHashes {
4216: foreach my $key (keys %hostid) {
4217: delete $hostid{$key};
4218: }
4219: foreach my $key (keys %hostdom) {
4220: delete $hostdom{$key};
4221: }
4222: foreach my $key (keys %hostip) {
4223: delete $hostip{$key};
4224: }
1.200 matthew 4225: foreach my $key (keys %hostdns) {
4226: delete $hostdns{$key};
4227: }
1.148 foxr 4228: }
4229: #
4230: # Read in the host table from file and distribute it into the various hashes:
4231: #
4232: # - %hostid - Indexed by IP, the loncapa hostname.
4233: # - %hostdom - Indexed by loncapa hostname, the domain.
4234: # - %hostip - Indexed by hostid, the Ip address of the host.
4235: sub ReadHostTable {
4236:
4237: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
1.200 matthew 4238: my $myloncapaname = $perlvar{'lonHostID'};
4239: Debug("My loncapa name is : $myloncapaname");
1.148 foxr 4240: while (my $configline=<CONFIG>) {
1.178 foxr 4241: if (!($configline =~ /^\s*\#/)) {
4242: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
4243: chomp($ip); $ip=~s/\D+$//;
1.200 matthew 4244: $hostid{$ip}=$id; # LonCAPA name of host by IP.
4245: $hostdom{$id}=$domain; # LonCAPA domain name of host.
4246: $hostip{$id}=$ip; # IP address of host.
4247: $hostdns{$name} = $id; # LonCAPA name of host by DNS.
4248:
4249: if ($id eq $perlvar{'lonHostID'}) {
4250: Debug("Found me in the host table: $name");
4251: $thisserver=$name;
4252: }
1.178 foxr 4253: }
1.148 foxr 4254: }
4255: close(CONFIG);
4256: }
4257: #
4258: # Reload the Apache daemon's state.
1.150 foxr 4259: # This is done by invoking /home/httpd/perl/apachereload
4260: # a setuid perl script that can be root for us to do this job.
1.148 foxr 4261: #
4262: sub ReloadApache {
1.150 foxr 4263: my $execdir = $perlvar{'lonDaemons'};
4264: my $script = $execdir."/apachereload";
4265: system($script);
1.148 foxr 4266: }
4267:
4268: #
1.144 foxr 4269: # Called in response to a USR2 signal.
4270: # - Reread hosts.tab
4271: # - All children connected to hosts that were removed from hosts.tab
4272: # are killed via SIGINT
4273: # - All children connected to previously existing hosts are sent SIGUSR1
4274: # - Our internal hosts hash is updated to reflect the new contents of
4275: # hosts.tab causing connections from hosts added to hosts.tab to
4276: # now be honored.
4277: #
4278: sub UpdateHosts {
1.165 albertel 4279: &status("Reload hosts.tab");
1.147 foxr 4280: logthis('<font color="blue"> Updating connections </font>');
1.148 foxr 4281: #
4282: # The %children hash has the set of IP's we currently have children
4283: # on. These need to be matched against records in the hosts.tab
4284: # Any ip's no longer in the table get killed off they correspond to
4285: # either dropped or changed hosts. Note that the re-read of the table
4286: # will take care of new and changed hosts as connections come into being.
4287:
4288:
4289: KillHostHashes;
4290: ReadHostTable;
4291:
4292: foreach my $child (keys %children) {
4293: my $childip = $children{$child};
4294: if(!$hostid{$childip}) {
1.149 foxr 4295: logthis('<font color="blue"> UpdateHosts killing child '
4296: ." $child for ip $childip </font>");
1.148 foxr 4297: kill('INT', $child);
1.149 foxr 4298: } else {
4299: logthis('<font color="green"> keeping child for ip '
4300: ." $childip (pid=$child) </font>");
1.148 foxr 4301: }
4302: }
4303: ReloadApache;
1.165 albertel 4304: &status("Finished reloading hosts.tab");
1.144 foxr 4305: }
4306:
1.148 foxr 4307:
1.57 www 4308: sub checkchildren {
1.165 albertel 4309: &status("Checking on the children (sending signals)");
1.57 www 4310: &initnewstatus();
4311: &logstatus();
4312: &logthis('Going to check on the children');
1.134 albertel 4313: my $docdir=$perlvar{'lonDocRoot'};
1.61 harris41 4314: foreach (sort keys %children) {
1.221 albertel 4315: #sleep 1;
1.57 www 4316: unless (kill 'USR1' => $_) {
4317: &logthis ('Child '.$_.' is dead');
4318: &logstatus($$.' is dead');
1.221 albertel 4319: delete($children{$_});
1.57 www 4320: }
1.61 harris41 4321: }
1.63 www 4322: sleep 5;
1.212 foxr 4323: $SIG{ALRM} = sub { Debug("timeout");
4324: die "timeout"; };
1.113 albertel 4325: $SIG{__DIE__} = 'DEFAULT';
1.165 albertel 4326: &status("Checking on the children (waiting for reports)");
1.63 www 4327: foreach (sort keys %children) {
4328: unless (-e "$docdir/lon-status/londchld/$_.txt") {
1.113 albertel 4329: eval {
4330: alarm(300);
1.63 www 4331: &logthis('Child '.$_.' did not respond');
1.67 albertel 4332: kill 9 => $_;
1.131 albertel 4333: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
4334: #$subj="LON: $currenthostid killed lond process $_";
4335: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
4336: #$execdir=$perlvar{'lonDaemons'};
4337: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
1.221 albertel 4338: delete($children{$_});
1.113 albertel 4339: alarm(0);
4340: }
1.63 www 4341: }
4342: }
1.113 albertel 4343: $SIG{ALRM} = 'DEFAULT';
1.155 albertel 4344: $SIG{__DIE__} = \&catchexception;
1.165 albertel 4345: &status("Finished checking children");
1.221 albertel 4346: &logthis('Finished Checking children');
1.57 www 4347: }
4348:
1.1 albertel 4349: # --------------------------------------------------------------------- Logging
4350:
4351: sub logthis {
4352: my $message=shift;
4353: my $execdir=$perlvar{'lonDaemons'};
4354: my $fh=IO::File->new(">>$execdir/logs/lond.log");
4355: my $now=time;
4356: my $local=localtime($now);
1.58 www 4357: $lastlog=$local.': '.$message;
1.1 albertel 4358: print $fh "$local ($$): $message\n";
4359: }
4360:
1.77 foxr 4361: # ------------------------- Conditional log if $DEBUG true.
4362: sub Debug {
4363: my $message = shift;
4364: if($DEBUG) {
4365: &logthis($message);
4366: }
4367: }
1.161 foxr 4368:
4369: #
4370: # Sub to do replies to client.. this gives a hook for some
4371: # debug tracing too:
4372: # Parameters:
4373: # fd - File open on client.
4374: # reply - Text to send to client.
4375: # request - Original request from client.
4376: #
4377: sub Reply {
1.192 foxr 4378: my ($fd, $reply, $request) = @_;
1.161 foxr 4379: print $fd $reply;
4380: Debug("Request was $request Reply was $reply");
4381:
1.212 foxr 4382: $Transactions++;
4383:
4384:
4385: }
4386:
4387:
4388: #
4389: # Sub to report a failure.
4390: # This function:
4391: # - Increments the failure statistic counters.
4392: # - Invokes Reply to send the error message to the client.
4393: # Parameters:
4394: # fd - File descriptor open on the client
4395: # reply - Reply text to emit.
4396: # request - The original request message (used by Reply
4397: # to debug if that's enabled.
4398: # Implicit outputs:
4399: # $Failures- The number of failures is incremented.
4400: # Reply (invoked here) sends a message to the
4401: # client:
4402: #
4403: sub Failure {
4404: my $fd = shift;
4405: my $reply = shift;
4406: my $request = shift;
4407:
4408: $Failures++;
4409: Reply($fd, $reply, $request); # That's simple eh?
1.161 foxr 4410: }
1.57 www 4411: # ------------------------------------------------------------------ Log status
4412:
4413: sub logstatus {
1.178 foxr 4414: &status("Doing logging");
4415: my $docdir=$perlvar{'lonDocRoot'};
4416: {
4417: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
1.200 matthew 4418: print $fh $status."\n".$lastlog."\n".time."\n$keymode";
1.178 foxr 4419: $fh->close();
4420: }
1.221 albertel 4421: &status("Finished $$.txt");
4422: {
4423: open(LOG,">>$docdir/lon-status/londstatus.txt");
4424: flock(LOG,LOCK_EX);
4425: print LOG $$."\t".$clientname."\t".$currenthostid."\t"
4426: .$status."\t".$lastlog."\t $keymode\n";
4427: flock(DB,LOCK_UN);
4428: close(LOG);
4429: }
1.178 foxr 4430: &status("Finished logging");
1.57 www 4431: }
4432:
4433: sub initnewstatus {
4434: my $docdir=$perlvar{'lonDocRoot'};
4435: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
4436: my $now=time;
4437: my $local=localtime($now);
4438: print $fh "LOND status $local - parent $$\n\n";
1.64 www 4439: opendir(DIR,"$docdir/lon-status/londchld");
1.134 albertel 4440: while (my $filename=readdir(DIR)) {
1.64 www 4441: unlink("$docdir/lon-status/londchld/$filename");
4442: }
4443: closedir(DIR);
1.57 www 4444: }
4445:
4446: # -------------------------------------------------------------- Status setting
4447:
4448: sub status {
4449: my $what=shift;
4450: my $now=time;
4451: my $local=localtime($now);
1.178 foxr 4452: $status=$local.': '.$what;
4453: $0='lond: '.$what.' '.$local;
1.57 www 4454: }
1.11 www 4455:
4456: # -------------------------------------------------------- Escape Special Chars
4457:
4458: sub escape {
4459: my $str=shift;
4460: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
4461: return $str;
4462: }
4463:
4464: # ----------------------------------------------------- Un-Escape Special Chars
4465:
4466: sub unescape {
4467: my $str=shift;
4468: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
4469: return $str;
4470: }
4471:
1.1 albertel 4472: # ----------------------------------------------------------- Send USR1 to lonc
4473:
4474: sub reconlonc {
4475: my $peerfile=shift;
4476: &logthis("Trying to reconnect for $peerfile");
4477: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
4478: if (my $fh=IO::File->new("$loncfile")) {
4479: my $loncpid=<$fh>;
4480: chomp($loncpid);
4481: if (kill 0 => $loncpid) {
4482: &logthis("lonc at pid $loncpid responding, sending USR1");
4483: kill USR1 => $loncpid;
4484: } else {
1.9 www 4485: &logthis(
1.190 albertel 4486: "<font color='red'>CRITICAL: "
1.9 www 4487: ."lonc at pid $loncpid not responding, giving up</font>");
1.1 albertel 4488: }
4489: } else {
1.190 albertel 4490: &logthis('<font color="red">CRITICAL: lonc not running, giving up</font>');
1.1 albertel 4491: }
4492: }
4493:
4494: # -------------------------------------------------- Non-critical communication
1.11 www 4495:
1.1 albertel 4496: sub subreply {
4497: my ($cmd,$server)=@_;
4498: my $peerfile="$perlvar{'lonSockDir'}/$server";
4499: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
4500: Type => SOCK_STREAM,
4501: Timeout => 10)
4502: or return "con_lost";
4503: print $sclient "$cmd\n";
4504: my $answer=<$sclient>;
4505: chomp($answer);
4506: if (!$answer) { $answer="con_lost"; }
4507: return $answer;
4508: }
4509:
4510: sub reply {
4511: my ($cmd,$server)=@_;
4512: my $answer;
1.115 albertel 4513: if ($server ne $currenthostid) {
1.1 albertel 4514: $answer=subreply($cmd,$server);
4515: if ($answer eq 'con_lost') {
4516: $answer=subreply("ping",$server);
4517: if ($answer ne $server) {
1.115 albertel 4518: &logthis("sub reply: answer != server answer is $answer, server is $server");
1.1 albertel 4519: &reconlonc("$perlvar{'lonSockDir'}/$server");
4520: }
4521: $answer=subreply($cmd,$server);
4522: }
4523: } else {
4524: $answer='self_reply';
4525: }
4526: return $answer;
4527: }
4528:
1.13 www 4529: # -------------------------------------------------------------- Talk to lonsql
4530:
1.234 foxr 4531: sub sql_reply {
1.12 harris41 4532: my ($cmd)=@_;
1.234 foxr 4533: my $answer=&sub_sql_reply($cmd);
4534: if ($answer eq 'con_lost') { $answer=&sub_sql_reply($cmd); }
1.12 harris41 4535: return $answer;
4536: }
4537:
1.234 foxr 4538: sub sub_sql_reply {
1.12 harris41 4539: my ($cmd)=@_;
4540: my $unixsock="mysqlsock";
4541: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
4542: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
4543: Type => SOCK_STREAM,
4544: Timeout => 10)
4545: or return "con_lost";
4546: print $sclient "$cmd\n";
4547: my $answer=<$sclient>;
4548: chomp($answer);
4549: if (!$answer) { $answer="con_lost"; }
4550: return $answer;
4551: }
4552:
1.1 albertel 4553: # -------------------------------------------- Return path to profile directory
1.11 www 4554:
1.1 albertel 4555: sub propath {
4556: my ($udom,$uname)=@_;
4557: $udom=~s/\W//g;
4558: $uname=~s/\W//g;
1.16 www 4559: my $subdir=$uname.'__';
1.1 albertel 4560: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
4561: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
4562: return $proname;
4563: }
4564:
4565: # --------------------------------------- Is this the home server of an author?
1.11 www 4566:
1.1 albertel 4567: sub ishome {
4568: my $author=shift;
4569: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
4570: my ($udom,$uname)=split(/\//,$author);
4571: my $proname=propath($udom,$uname);
4572: if (-e $proname) {
4573: return 'owner';
4574: } else {
4575: return 'not_owner';
4576: }
4577: }
4578:
4579: # ======================================================= Continue main program
4580: # ---------------------------------------------------- Fork once and dissociate
4581:
1.134 albertel 4582: my $fpid=fork;
1.1 albertel 4583: exit if $fpid;
1.29 harris41 4584: die "Couldn't fork: $!" unless defined ($fpid);
1.1 albertel 4585:
1.29 harris41 4586: POSIX::setsid() or die "Can't start new session: $!";
1.1 albertel 4587:
4588: # ------------------------------------------------------- Write our PID on disk
4589:
1.134 albertel 4590: my $execdir=$perlvar{'lonDaemons'};
1.1 albertel 4591: open (PIDSAVE,">$execdir/logs/lond.pid");
4592: print PIDSAVE "$$\n";
4593: close(PIDSAVE);
1.190 albertel 4594: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
1.57 www 4595: &status('Starting');
1.1 albertel 4596:
1.106 foxr 4597:
1.1 albertel 4598:
4599: # ----------------------------------------------------- Install signal handlers
4600:
1.57 www 4601:
1.1 albertel 4602: $SIG{CHLD} = \&REAPER;
4603: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
4604: $SIG{HUP} = \&HUPSMAN;
1.57 www 4605: $SIG{USR1} = \&checkchildren;
1.144 foxr 4606: $SIG{USR2} = \&UpdateHosts;
1.106 foxr 4607:
1.148 foxr 4608: # Read the host hashes:
4609:
4610: ReadHostTable;
1.106 foxr 4611:
4612: # --------------------------------------------------------------
4613: # Accept connections. When a connection comes in, it is validated
4614: # and if good, a child process is created to process transactions
4615: # along the connection.
4616:
1.1 albertel 4617: while (1) {
1.165 albertel 4618: &status('Starting accept');
1.106 foxr 4619: $client = $server->accept() or next;
1.165 albertel 4620: &status('Accepted '.$client.' off to spawn');
1.106 foxr 4621: make_new_child($client);
1.165 albertel 4622: &status('Finished spawning');
1.1 albertel 4623: }
4624:
1.212 foxr 4625: sub make_new_child {
4626: my $pid;
4627: # my $cipher; # Now global
4628: my $sigset;
1.178 foxr 4629:
1.212 foxr 4630: $client = shift;
4631: &status('Starting new child '.$client);
4632: &logthis('<font color="green"> Attempting to start child ('.$client.
4633: ")</font>");
4634: # block signal for fork
4635: $sigset = POSIX::SigSet->new(SIGINT);
4636: sigprocmask(SIG_BLOCK, $sigset)
4637: or die "Can't block SIGINT for fork: $!\n";
1.178 foxr 4638:
1.212 foxr 4639: die "fork: $!" unless defined ($pid = fork);
1.178 foxr 4640:
1.212 foxr 4641: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
4642: # connection liveness.
1.178 foxr 4643:
1.212 foxr 4644: #
4645: # Figure out who we're talking to so we can record the peer in
4646: # the pid hash.
4647: #
4648: my $caller = getpeername($client);
4649: my ($port,$iaddr);
4650: if (defined($caller) && length($caller) > 0) {
4651: ($port,$iaddr)=unpack_sockaddr_in($caller);
4652: } else {
4653: &logthis("Unable to determine who caller was, getpeername returned nothing");
4654: }
4655: if (defined($iaddr)) {
4656: $clientip = inet_ntoa($iaddr);
4657: Debug("Connected with $clientip");
4658: $clientdns = gethostbyaddr($iaddr, AF_INET);
4659: Debug("Connected with $clientdns by name");
4660: } else {
4661: &logthis("Unable to determine clientip");
4662: $clientip='Unavailable';
4663: }
4664:
4665: if ($pid) {
4666: # Parent records the child's birth and returns.
4667: sigprocmask(SIG_UNBLOCK, $sigset)
4668: or die "Can't unblock SIGINT for fork: $!\n";
4669: $children{$pid} = $clientip;
4670: &status('Started child '.$pid);
4671: return;
4672: } else {
4673: # Child can *not* return from this subroutine.
4674: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
4675: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
4676: #don't get intercepted
4677: $SIG{USR1}= \&logstatus;
4678: $SIG{ALRM}= \&timeout;
4679: $lastlog='Forked ';
4680: $status='Forked';
1.178 foxr 4681:
1.212 foxr 4682: # unblock signals
4683: sigprocmask(SIG_UNBLOCK, $sigset)
4684: or die "Can't unblock SIGINT for fork: $!\n";
1.178 foxr 4685:
1.212 foxr 4686: # my $tmpsnum=0; # Now global
4687: #---------------------------------------------------- kerberos 5 initialization
4688: &Authen::Krb5::init_context();
4689: &Authen::Krb5::init_ets();
1.209 albertel 4690:
1.212 foxr 4691: &status('Accepted connection');
4692: # =============================================================================
4693: # do something with the connection
4694: # -----------------------------------------------------------------------------
4695: # see if we know client and 'check' for spoof IP by ineffective challenge
1.178 foxr 4696:
1.212 foxr 4697: ReadManagerTable; # May also be a manager!!
4698:
4699: my $clientrec=($hostid{$clientip} ne undef);
4700: my $ismanager=($managers{$clientip} ne undef);
4701: $clientname = "[unknonwn]";
4702: if($clientrec) { # Establish client type.
4703: $ConnectionType = "client";
4704: $clientname = $hostid{$clientip};
4705: if($ismanager) {
4706: $ConnectionType = "both";
4707: }
4708: } else {
4709: $ConnectionType = "manager";
4710: $clientname = $managers{$clientip};
4711: }
4712: my $clientok;
1.178 foxr 4713:
1.212 foxr 4714: if ($clientrec || $ismanager) {
4715: &status("Waiting for init from $clientip $clientname");
4716: &logthis('<font color="yellow">INFO: Connection, '.
4717: $clientip.
4718: " ($clientname) connection type = $ConnectionType </font>" );
4719: &status("Connecting $clientip ($clientname))");
4720: my $remotereq=<$client>;
4721: chomp($remotereq);
4722: Debug("Got init: $remotereq");
4723: my $inikeyword = split(/:/, $remotereq);
4724: if ($remotereq =~ /^init/) {
4725: &sethost("sethost:$perlvar{'lonHostID'}");
4726: #
4727: # If the remote is attempting a local init... give that a try:
4728: #
4729: my ($i, $inittype) = split(/:/, $remotereq);
1.209 albertel 4730:
1.212 foxr 4731: # If the connection type is ssl, but I didn't get my
4732: # certificate files yet, then I'll drop back to
4733: # insecure (if allowed).
4734:
4735: if($inittype eq "ssl") {
4736: my ($ca, $cert) = lonssl::CertificateFile;
4737: my $kfile = lonssl::KeyFile;
4738: if((!$ca) ||
4739: (!$cert) ||
4740: (!$kfile)) {
4741: $inittype = ""; # This forces insecure attempt.
4742: &logthis("<font color=\"blue\"> Certificates not "
4743: ."installed -- trying insecure auth</font>");
1.224 foxr 4744: } else { # SSL certificates are in place so
1.212 foxr 4745: } # Leave the inittype alone.
4746: }
4747:
4748: if($inittype eq "local") {
4749: my $key = LocalConnection($client, $remotereq);
4750: if($key) {
4751: Debug("Got local key $key");
4752: $clientok = 1;
4753: my $cipherkey = pack("H32", $key);
4754: $cipher = new IDEA($cipherkey);
4755: print $client "ok:local\n";
4756: &logthis('<font color="green"'
4757: . "Successful local authentication </font>");
4758: $keymode = "local"
1.178 foxr 4759: } else {
1.212 foxr 4760: Debug("Failed to get local key");
4761: $clientok = 0;
4762: shutdown($client, 3);
4763: close $client;
1.178 foxr 4764: }
1.212 foxr 4765: } elsif ($inittype eq "ssl") {
4766: my $key = SSLConnection($client);
4767: if ($key) {
4768: $clientok = 1;
4769: my $cipherkey = pack("H32", $key);
4770: $cipher = new IDEA($cipherkey);
4771: &logthis('<font color="green">'
4772: ."Successfull ssl authentication with $clientname </font>");
4773: $keymode = "ssl";
4774:
1.178 foxr 4775: } else {
1.212 foxr 4776: $clientok = 0;
4777: close $client;
1.178 foxr 4778: }
1.212 foxr 4779:
4780: } else {
4781: my $ok = InsecureConnection($client);
4782: if($ok) {
4783: $clientok = 1;
4784: &logthis('<font color="green">'
4785: ."Successful insecure authentication with $clientname </font>");
4786: print $client "ok\n";
4787: $keymode = "insecure";
1.178 foxr 4788: } else {
1.212 foxr 4789: &logthis('<font color="yellow">'
4790: ."Attempted insecure connection disallowed </font>");
4791: close $client;
4792: $clientok = 0;
1.178 foxr 4793:
4794: }
4795: }
1.212 foxr 4796: } else {
4797: &logthis(
4798: "<font color='blue'>WARNING: "
4799: ."$clientip failed to initialize: >$remotereq< </font>");
4800: &status('No init '.$clientip);
4801: }
4802:
4803: } else {
4804: &logthis(
4805: "<font color='blue'>WARNING: Unknown client $clientip</font>");
4806: &status('Hung up on '.$clientip);
4807: }
4808:
4809: if ($clientok) {
4810: # ---------------- New known client connecting, could mean machine online again
4811:
4812: foreach my $id (keys(%hostip)) {
4813: if ($hostip{$id} ne $clientip ||
4814: $hostip{$currenthostid} eq $clientip) {
4815: # no need to try to do recon's to myself
4816: next;
4817: }
4818: &reconlonc("$perlvar{'lonSockDir'}/$id");
4819: }
4820: &logthis("<font color='green'>Established connection: $clientname</font>");
4821: &status('Will listen to '.$clientname);
4822: # ------------------------------------------------------------ Process requests
4823: my $keep_going = 1;
4824: my $user_input;
4825: while(($user_input = get_request) && $keep_going) {
4826: alarm(120);
4827: Debug("Main: Got $user_input\n");
4828: $keep_going = &process_request($user_input);
1.178 foxr 4829: alarm(0);
1.212 foxr 4830: &status('Listening to '.$clientname." ($keymode)");
1.161 foxr 4831: }
1.212 foxr 4832:
1.59 www 4833: # --------------------------------------------- client unknown or fishy, refuse
1.212 foxr 4834: } else {
1.161 foxr 4835: print $client "refused\n";
4836: $client->close();
1.190 albertel 4837: &logthis("<font color='blue'>WARNING: "
1.161 foxr 4838: ."Rejected client $clientip, closing connection</font>");
4839: }
1.212 foxr 4840: }
1.161 foxr 4841:
1.1 albertel 4842: # =============================================================================
1.161 foxr 4843:
1.190 albertel 4844: &logthis("<font color='red'>CRITICAL: "
1.161 foxr 4845: ."Disconnect from $clientip ($clientname)</font>");
4846:
4847:
4848: # this exit is VERY important, otherwise the child will become
4849: # a producer of more and more children, forking yourself into
4850: # process death.
4851: exit;
1.106 foxr 4852:
1.78 foxr 4853: }
4854:
4855:
4856: #
4857: # Checks to see if the input roleput request was to set
4858: # an author role. If so, invokes the lchtmldir script to set
4859: # up a correct public_html
4860: # Parameters:
4861: # request - The request sent to the rolesput subchunk.
4862: # We're looking for /domain/_au
4863: # domain - The domain in which the user is having roles doctored.
4864: # user - Name of the user for which the role is being put.
4865: # authtype - The authentication type associated with the user.
4866: #
1.230 foxr 4867: sub manage_permissions
1.78 foxr 4868: {
1.192 foxr 4869:
4870: my ($request, $domain, $user, $authtype) = @_;
1.78 foxr 4871:
4872: # See if the request is of the form /$domain/_au
4873: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
4874: my $execdir = $perlvar{'lonDaemons'};
4875: my $userhome= "/home/$user" ;
1.134 albertel 4876: &logthis("system $execdir/lchtmldir $userhome $user $authtype");
1.78 foxr 4877: system("$execdir/lchtmldir $userhome $user $authtype");
4878: }
4879: }
1.222 foxr 4880:
4881:
4882: #
4883: # Return the full path of a user password file, whether it exists or not.
4884: # Parameters:
4885: # domain - Domain in which the password file lives.
4886: # user - name of the user.
4887: # Returns:
4888: # Full passwd path:
4889: #
4890: sub password_path {
4891: my ($domain, $user) = @_;
4892:
4893:
4894: my $path = &propath($domain, $user);
4895: $path .= "/passwd";
4896:
4897: return $path;
4898: }
4899:
4900: # Password Filename
4901: # Returns the path to a passwd file given domain and user... only if
4902: # it exists.
4903: # Parameters:
4904: # domain - Domain in which to search.
4905: # user - username.
4906: # Returns:
4907: # - If the password file exists returns its path.
4908: # - If the password file does not exist, returns undefined.
4909: #
4910: sub password_filename {
4911: my ($domain, $user) = @_;
4912:
4913: Debug ("PasswordFilename called: dom = $domain user = $user");
4914:
4915: my $path = &password_path($domain, $user);
4916: Debug("PasswordFilename got path: $path");
4917: if(-e $path) {
4918: return $path;
4919: } else {
4920: return undef;
4921: }
4922: }
4923:
4924: #
4925: # Rewrite the contents of the user's passwd file.
4926: # Parameters:
4927: # domain - domain of the user.
4928: # name - User's name.
4929: # contents - New contents of the file.
4930: # Returns:
4931: # 0 - Failed.
4932: # 1 - Success.
4933: #
4934: sub rewrite_password_file {
4935: my ($domain, $user, $contents) = @_;
4936:
4937: my $file = &password_filename($domain, $user);
4938: if (defined $file) {
4939: my $pf = IO::File->new(">$file");
4940: if($pf) {
4941: print $pf "$contents\n";
4942: return 1;
4943: } else {
4944: return 0;
4945: }
4946: } else {
4947: return 0;
4948: }
4949:
4950: }
4951:
1.78 foxr 4952: #
1.222 foxr 4953: # get_auth_type - Determines the authorization type of a user in a domain.
1.78 foxr 4954:
4955: # Returns the authorization type or nouser if there is no such user.
4956: #
1.222 foxr 4957: sub get_auth_type
1.78 foxr 4958: {
1.192 foxr 4959:
4960: my ($domain, $user) = @_;
1.78 foxr 4961:
1.222 foxr 4962: Debug("get_auth_type( $domain, $user ) \n");
1.78 foxr 4963: my $proname = &propath($domain, $user);
4964: my $passwdfile = "$proname/passwd";
4965: if( -e $passwdfile ) {
4966: my $pf = IO::File->new($passwdfile);
4967: my $realpassword = <$pf>;
4968: chomp($realpassword);
1.79 foxr 4969: Debug("Password info = $realpassword\n");
1.78 foxr 4970: my ($authtype, $contentpwd) = split(/:/, $realpassword);
1.79 foxr 4971: Debug("Authtype = $authtype, content = $contentpwd\n");
1.78 foxr 4972: my $availinfo = '';
1.91 albertel 4973: if($authtype eq 'krb4' or $authtype eq 'krb5') {
1.78 foxr 4974: $availinfo = $contentpwd;
4975: }
1.79 foxr 4976:
1.78 foxr 4977: return "$authtype:$availinfo";
1.224 foxr 4978: } else {
1.79 foxr 4979: Debug("Returning nouser");
1.78 foxr 4980: return "nouser";
4981: }
1.1 albertel 4982: }
4983:
1.220 foxr 4984: #
4985: # Validate a user given their domain, name and password. This utility
4986: # function is used by both AuthenticateHandler and ChangePasswordHandler
4987: # to validate the login credentials of a user.
4988: # Parameters:
4989: # $domain - The domain being logged into (this is required due to
4990: # the capability for multihomed systems.
4991: # $user - The name of the user being validated.
4992: # $password - The user's propoposed password.
4993: #
4994: # Returns:
4995: # 1 - The domain,user,pasword triplet corresponds to a valid
4996: # user.
4997: # 0 - The domain,user,password triplet is not a valid user.
4998: #
4999: sub validate_user {
5000: my ($domain, $user, $password) = @_;
5001:
5002:
5003: # Why negative ~pi you may well ask? Well this function is about
5004: # authentication, and therefore very important to get right.
5005: # I've initialized the flag that determines whether or not I've
5006: # validated correctly to a value it's not supposed to get.
5007: # At the end of this function. I'll ensure that it's not still that
5008: # value so we don't just wind up returning some accidental value
5009: # as a result of executing an unforseen code path that
1.249 foxr 5010: # did not set $validated. At the end of valid execution paths,
5011: # validated shoule be 1 for success or 0 for failuer.
1.220 foxr 5012:
5013: my $validated = -3.14159;
5014:
5015: # How we authenticate is determined by the type of authentication
5016: # the user has been assigned. If the authentication type is
5017: # "nouser", the user does not exist so we will return 0.
5018:
1.222 foxr 5019: my $contents = &get_auth_type($domain, $user);
1.220 foxr 5020: my ($howpwd, $contentpwd) = split(/:/, $contents);
5021:
5022: my $null = pack("C",0); # Used by kerberos auth types.
5023:
5024: if ($howpwd ne 'nouser') {
5025:
5026: if($howpwd eq "internal") { # Encrypted is in local password file.
5027: $validated = (crypt($password, $contentpwd) eq $contentpwd);
5028: }
5029: elsif ($howpwd eq "unix") { # User is a normal unix user.
5030: $contentpwd = (getpwnam($user))[1];
5031: if($contentpwd) {
5032: if($contentpwd eq 'x') { # Shadow password file...
5033: my $pwauth_path = "/usr/local/sbin/pwauth";
5034: open PWAUTH, "|$pwauth_path" or
5035: die "Cannot invoke authentication";
5036: print PWAUTH "$user\n$password\n";
5037: close PWAUTH;
5038: $validated = ! $?;
5039:
5040: } else { # Passwords in /etc/passwd.
5041: $validated = (crypt($password,
5042: $contentpwd) eq $contentpwd);
5043: }
5044: } else {
5045: $validated = 0;
5046: }
5047: }
5048: elsif ($howpwd eq "krb4") { # user is in kerberos 4 auth. domain.
5049: if(! ($password =~ /$null/) ) {
5050: my $k4error = &Authen::Krb4::get_pw_in_tkt($user,
5051: "",
5052: $contentpwd,,
5053: 'krbtgt',
5054: $contentpwd,
5055: 1,
5056: $password);
5057: if(!$k4error) {
5058: $validated = 1;
1.224 foxr 5059: } else {
1.220 foxr 5060: $validated = 0;
5061: &logthis('krb4: '.$user.', '.$contentpwd.', '.
5062: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
5063: }
1.224 foxr 5064: } else {
1.220 foxr 5065: $validated = 0; # Password has a match with null.
5066: }
1.224 foxr 5067: } elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain.
1.220 foxr 5068: if(!($password =~ /$null/)) { # Null password not allowed.
5069: my $krbclient = &Authen::Krb5::parse_name($user.'@'
5070: .$contentpwd);
5071: my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd;
5072: my $krbserver = &Authen::Krb5::parse_name($krbservice);
5073: my $credentials= &Authen::Krb5::cc_default();
5074: $credentials->initialize($krbclient);
5075: my $krbreturn = &Authen::KRb5::get_in_tkt_with_password($krbclient,
5076: $krbserver,
5077: $password,
5078: $credentials);
5079: $validated = ($krbreturn == 1);
1.224 foxr 5080: } else {
1.220 foxr 5081: $validated = 0;
5082: }
1.224 foxr 5083: } elsif ($howpwd eq "localauth") {
1.220 foxr 5084: # Authenticate via installation specific authentcation method:
5085: $validated = &localauth::localauth($user,
5086: $password,
5087: $contentpwd);
1.224 foxr 5088: } else { # Unrecognized auth is also bad.
1.220 foxr 5089: $validated = 0;
5090: }
5091: } else {
5092: $validated = 0;
5093: }
5094: #
5095: # $validated has the correct stat of the authentication:
5096: #
5097:
5098: unless ($validated != -3.14159) {
1.249 foxr 5099: # I >really really< want to know if this happens.
5100: # since it indicates that user authentication is badly
5101: # broken in some code path.
5102: #
5103: die "ValidateUser - failed to set the value of validated $domain, $user $password";
1.220 foxr 5104: }
5105: return $validated;
5106: }
5107:
5108:
1.84 albertel 5109: sub addline {
5110: my ($fname,$hostid,$ip,$newline)=@_;
5111: my $contents;
5112: my $found=0;
5113: my $expr='^'.$hostid.':'.$ip.':';
5114: $expr =~ s/\./\\\./g;
1.134 albertel 5115: my $sh;
1.84 albertel 5116: if ($sh=IO::File->new("$fname.subscription")) {
5117: while (my $subline=<$sh>) {
5118: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
5119: }
5120: $sh->close();
5121: }
5122: $sh=IO::File->new(">$fname.subscription");
5123: if ($contents) { print $sh $contents; }
5124: if ($newline) { print $sh $newline; }
5125: $sh->close();
5126: return $found;
1.86 www 5127: }
5128:
1.234 foxr 5129: sub get_chat {
1.122 www 5130: my ($cdom,$cname,$udom,$uname)=@_;
1.87 www 5131: my %hash;
5132: my $proname=&propath($cdom,$cname);
5133: my @entries=();
1.88 albertel 5134: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
5135: &GDBM_READER(),0640)) {
5136: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
5137: untie %hash;
1.123 www 5138: }
1.124 www 5139: my @participants=();
1.134 albertel 5140: my $cutoff=time-60;
1.123 www 5141: if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db",
1.124 www 5142: &GDBM_WRCREAT(),0640)) {
5143: $hash{$uname.':'.$udom}=time;
1.123 www 5144: foreach (sort keys %hash) {
5145: if ($hash{$_}>$cutoff) {
1.124 www 5146: $participants[$#participants+1]='active_participant:'.$_;
1.123 www 5147: }
5148: }
5149: untie %hash;
1.86 www 5150: }
1.124 www 5151: return (@participants,@entries);
1.86 www 5152: }
5153:
1.234 foxr 5154: sub chat_add {
1.88 albertel 5155: my ($cdom,$cname,$newchat)=@_;
5156: my %hash;
5157: my $proname=&propath($cdom,$cname);
5158: my @entries=();
1.142 www 5159: my $time=time;
1.88 albertel 5160: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
5161: &GDBM_WRCREAT(),0640)) {
5162: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
5163: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
5164: my ($thentime,$idnum)=split(/\_/,$lastid);
5165: my $newid=$time.'_000000';
5166: if ($thentime==$time) {
5167: $idnum=~s/^0+//;
5168: $idnum++;
5169: $idnum=substr('000000'.$idnum,-6,6);
5170: $newid=$time.'_'.$idnum;
5171: }
5172: $hash{$newid}=$newchat;
5173: my $expired=$time-3600;
5174: foreach (keys %hash) {
5175: my ($thistime)=($_=~/(\d+)\_/);
5176: if ($thistime<$expired) {
1.89 www 5177: delete $hash{$_};
1.88 albertel 5178: }
5179: }
5180: untie %hash;
1.142 www 5181: }
5182: {
5183: my $hfh;
5184: if ($hfh=IO::File->new(">>$proname/chatroom.log")) {
5185: print $hfh "$time:".&unescape($newchat)."\n";
5186: }
1.86 www 5187: }
1.84 albertel 5188: }
5189:
5190: sub unsub {
5191: my ($fname,$clientip)=@_;
5192: my $result;
1.188 foxr 5193: my $unsubs = 0; # Number of successful unsubscribes:
5194:
5195:
5196: # An old way subscriptions were handled was to have a
5197: # subscription marker file:
5198:
5199: Debug("Attempting unlink of $fname.$clientname");
1.161 foxr 5200: if (unlink("$fname.$clientname")) {
1.188 foxr 5201: $unsubs++; # Successful unsub via marker file.
5202: }
5203:
5204: # The more modern way to do it is to have a subscription list
5205: # file:
5206:
1.84 albertel 5207: if (-e "$fname.subscription") {
1.161 foxr 5208: my $found=&addline($fname,$clientname,$clientip,'');
1.188 foxr 5209: if ($found) {
5210: $unsubs++;
5211: }
5212: }
5213:
5214: # If either or both of these mechanisms succeeded in unsubscribing a
5215: # resource we can return ok:
5216:
5217: if($unsubs) {
5218: $result = "ok\n";
1.84 albertel 5219: } else {
1.188 foxr 5220: $result = "not_subscribed\n";
1.84 albertel 5221: }
1.188 foxr 5222:
1.84 albertel 5223: return $result;
5224: }
5225:
1.101 www 5226: sub currentversion {
5227: my $fname=shift;
5228: my $version=-1;
5229: my $ulsdir='';
5230: if ($fname=~/^(.+)\/[^\/]+$/) {
5231: $ulsdir=$1;
5232: }
1.114 albertel 5233: my ($fnamere1,$fnamere2);
5234: # remove version if already specified
1.101 www 5235: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
1.114 albertel 5236: # get the bits that go before and after the version number
5237: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
5238: $fnamere1=$1;
5239: $fnamere2='.'.$2;
5240: }
1.101 www 5241: if (-e $fname) { $version=1; }
5242: if (-e $ulsdir) {
1.134 albertel 5243: if(-d $ulsdir) {
5244: if (opendir(LSDIR,$ulsdir)) {
5245: my $ulsfn;
5246: while ($ulsfn=readdir(LSDIR)) {
1.101 www 5247: # see if this is a regular file (ignore links produced earlier)
1.134 albertel 5248: my $thisfile=$ulsdir.'/'.$ulsfn;
5249: unless (-l $thisfile) {
1.160 www 5250: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
1.134 albertel 5251: if ($1>$version) { $version=$1; }
5252: }
5253: }
5254: }
5255: closedir(LSDIR);
5256: $version++;
5257: }
5258: }
5259: }
5260: return $version;
1.101 www 5261: }
5262:
5263: sub thisversion {
5264: my $fname=shift;
5265: my $version=-1;
5266: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
5267: $version=$1;
5268: }
5269: return $version;
5270: }
5271:
1.84 albertel 5272: sub subscribe {
5273: my ($userinput,$clientip)=@_;
5274: my $result;
5275: my ($cmd,$fname)=split(/:/,$userinput);
5276: my $ownership=&ishome($fname);
5277: if ($ownership eq 'owner') {
1.101 www 5278: # explitly asking for the current version?
5279: unless (-e $fname) {
5280: my $currentversion=¤tversion($fname);
5281: if (&thisversion($fname)==$currentversion) {
5282: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
5283: my $root=$1;
5284: my $extension=$2;
5285: symlink($root.'.'.$extension,
5286: $root.'.'.$currentversion.'.'.$extension);
1.102 www 5287: unless ($extension=~/\.meta$/) {
5288: symlink($root.'.'.$extension.'.meta',
5289: $root.'.'.$currentversion.'.'.$extension.'.meta');
5290: }
1.101 www 5291: }
5292: }
5293: }
1.84 albertel 5294: if (-e $fname) {
5295: if (-d $fname) {
5296: $result="directory\n";
5297: } else {
1.161 foxr 5298: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
1.134 albertel 5299: my $now=time;
1.161 foxr 5300: my $found=&addline($fname,$clientname,$clientip,
5301: "$clientname:$clientip:$now\n");
1.84 albertel 5302: if ($found) { $result="$fname\n"; }
5303: # if they were subscribed to only meta data, delete that
5304: # subscription, when you subscribe to a file you also get
5305: # the metadata
5306: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
5307: $fname=~s/\/home\/httpd\/html\/res/raw/;
5308: $fname="http://$thisserver/".$fname;
5309: $result="$fname\n";
5310: }
5311: } else {
5312: $result="not_found\n";
5313: }
5314: } else {
5315: $result="rejected\n";
5316: }
5317: return $result;
5318: }
1.91 albertel 5319:
5320: sub make_passwd_file {
1.98 foxr 5321: my ($uname, $umode,$npass,$passfilename)=@_;
1.91 albertel 5322: my $result="ok\n";
5323: if ($umode eq 'krb4' or $umode eq 'krb5') {
5324: {
5325: my $pf = IO::File->new(">$passfilename");
5326: print $pf "$umode:$npass\n";
5327: }
5328: } elsif ($umode eq 'internal') {
5329: my $salt=time;
5330: $salt=substr($salt,6,2);
5331: my $ncpass=crypt($npass,$salt);
5332: {
5333: &Debug("Creating internal auth");
5334: my $pf = IO::File->new(">$passfilename");
5335: print $pf "internal:$ncpass\n";
5336: }
5337: } elsif ($umode eq 'localauth') {
5338: {
5339: my $pf = IO::File->new(">$passfilename");
5340: print $pf "localauth:$npass\n";
5341: }
5342: } elsif ($umode eq 'unix') {
5343: {
1.186 foxr 5344: #
5345: # Don't allow the creation of privileged accounts!!! that would
5346: # be real bad!!!
5347: #
5348: my $uid = getpwnam($uname);
5349: if((defined $uid) && ($uid == 0)) {
5350: &logthis(">>>Attempted to create privilged account blocked");
5351: return "no_priv_account_error\n";
5352: }
5353:
1.223 foxr 5354: my $execpath ="$perlvar{'lonDaemons'}/"."lcuseradd";
1.224 foxr 5355:
5356: my $lc_error_file = $execdir."/tmp/lcuseradd".$$.".status";
1.91 albertel 5357: {
5358: &Debug("Executing external: ".$execpath);
1.98 foxr 5359: &Debug("user = ".$uname.", Password =". $npass);
1.132 matthew 5360: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
1.91 albertel 5361: print $se "$uname\n";
5362: print $se "$npass\n";
5363: print $se "$npass\n";
1.223 foxr 5364: print $se "$lc_error_file\n"; # Status -> unique file.
1.97 foxr 5365: }
1.223 foxr 5366: my $error = IO::File->new("< $lc_error_file");
5367: my $useraddok = <$error>;
5368: $error->close;
5369: unlink($lc_error_file);
5370:
5371: chomp $useraddok;
5372:
1.97 foxr 5373: if($useraddok > 0) {
1.223 foxr 5374: my $error_text = &lcuseraddstrerror($useraddok);
5375: &logthis("Failed lcuseradd: $error_text");
5376: $result = "lcuseradd_failed:$error_text\n";
1.224 foxr 5377: } else {
1.223 foxr 5378: my $pf = IO::File->new(">$passfilename");
5379: print $pf "unix:\n";
1.91 albertel 5380: }
5381: }
5382: } elsif ($umode eq 'none') {
5383: {
1.223 foxr 5384: my $pf = IO::File->new("> $passfilename");
1.91 albertel 5385: print $pf "none:\n";
5386: }
5387: } else {
5388: $result="auth_mode_error\n";
5389: }
5390: return $result;
1.121 albertel 5391: }
5392:
5393: sub sethost {
5394: my ($remotereq) = @_;
5395: my (undef,$hostid)=split(/:/,$remotereq);
5396: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
5397: if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
1.200 matthew 5398: $currenthostid =$hostid;
1.121 albertel 5399: $currentdomainid=$hostdom{$hostid};
5400: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
5401: } else {
5402: &logthis("Requested host id $hostid not an alias of ".
5403: $perlvar{'lonHostID'}." refusing connection");
5404: return 'unable_to_set';
5405: }
5406: return 'ok';
5407: }
5408:
5409: sub version {
5410: my ($userinput)=@_;
5411: $remoteVERSION=(split(/:/,$userinput))[1];
5412: return "version:$VERSION";
1.127 albertel 5413: }
1.178 foxr 5414:
1.128 albertel 5415: #There is a copy of this in lonnet.pm
1.127 albertel 5416: sub userload {
5417: my $numusers=0;
5418: {
5419: opendir(LONIDS,$perlvar{'lonIDsDir'});
5420: my $filename;
5421: my $curtime=time;
5422: while ($filename=readdir(LONIDS)) {
5423: if ($filename eq '.' || $filename eq '..') {next;}
1.138 albertel 5424: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
1.159 albertel 5425: if ($curtime-$mtime < 1800) { $numusers++; }
1.127 albertel 5426: }
5427: closedir(LONIDS);
5428: }
5429: my $userloadpercent=0;
5430: my $maxuserload=$perlvar{'lonUserLoadLim'};
5431: if ($maxuserload) {
1.129 albertel 5432: $userloadpercent=100*$numusers/$maxuserload;
1.127 albertel 5433: }
1.130 albertel 5434: $userloadpercent=sprintf("%.2f",$userloadpercent);
1.127 albertel 5435: return $userloadpercent;
1.91 albertel 5436: }
5437:
1.205 raeburn 5438: # Routines for serializing arrays and hashes (copies from lonnet)
5439:
5440: sub array2str {
5441: my (@array) = @_;
5442: my $result=&arrayref2str(\@array);
5443: $result=~s/^__ARRAY_REF__//;
5444: $result=~s/__END_ARRAY_REF__$//;
5445: return $result;
5446: }
5447:
5448: sub arrayref2str {
5449: my ($arrayref) = @_;
5450: my $result='__ARRAY_REF__';
5451: foreach my $elem (@$arrayref) {
5452: if(ref($elem) eq 'ARRAY') {
5453: $result.=&arrayref2str($elem).'&';
5454: } elsif(ref($elem) eq 'HASH') {
5455: $result.=&hashref2str($elem).'&';
5456: } elsif(ref($elem)) {
5457: #print("Got a ref of ".(ref($elem))." skipping.");
5458: } else {
5459: $result.=&escape($elem).'&';
5460: }
5461: }
5462: $result=~s/\&$//;
5463: $result .= '__END_ARRAY_REF__';
5464: return $result;
5465: }
5466:
5467: sub hash2str {
5468: my (%hash) = @_;
5469: my $result=&hashref2str(\%hash);
5470: $result=~s/^__HASH_REF__//;
5471: $result=~s/__END_HASH_REF__$//;
5472: return $result;
5473: }
5474:
5475: sub hashref2str {
5476: my ($hashref)=@_;
5477: my $result='__HASH_REF__';
5478: foreach (sort(keys(%$hashref))) {
5479: if (ref($_) eq 'ARRAY') {
5480: $result.=&arrayref2str($_).'=';
5481: } elsif (ref($_) eq 'HASH') {
5482: $result.=&hashref2str($_).'=';
5483: } elsif (ref($_)) {
5484: $result.='=';
5485: #print("Got a ref of ".(ref($_))." skipping.");
5486: } else {
5487: if ($_) {$result.=&escape($_).'=';} else { last; }
5488: }
5489:
5490: if(ref($hashref->{$_}) eq 'ARRAY') {
5491: $result.=&arrayref2str($hashref->{$_}).'&';
5492: } elsif(ref($hashref->{$_}) eq 'HASH') {
5493: $result.=&hashref2str($hashref->{$_}).'&';
5494: } elsif(ref($hashref->{$_})) {
5495: $result.='&';
5496: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
5497: } else {
5498: $result.=&escape($hashref->{$_}).'&';
5499: }
5500: }
5501: $result=~s/\&$//;
5502: $result .= '__END_HASH_REF__';
5503: return $result;
5504: }
1.200 matthew 5505:
1.61 harris41 5506: # ----------------------------------- POD (plain old documentation, CPAN style)
5507:
5508: =head1 NAME
5509:
5510: lond - "LON Daemon" Server (port "LOND" 5663)
5511:
5512: =head1 SYNOPSIS
5513:
1.74 harris41 5514: Usage: B<lond>
5515:
5516: Should only be run as user=www. This is a command-line script which
5517: is invoked by B<loncron>. There is no expectation that a typical user
5518: will manually start B<lond> from the command-line. (In other words,
5519: DO NOT START B<lond> YOURSELF.)
1.61 harris41 5520:
5521: =head1 DESCRIPTION
5522:
1.74 harris41 5523: There are two characteristics associated with the running of B<lond>,
5524: PROCESS MANAGEMENT (starting, stopping, handling child processes)
5525: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
5526: subscriptions, etc). These are described in two large
5527: sections below.
5528:
5529: B<PROCESS MANAGEMENT>
5530:
1.61 harris41 5531: Preforker - server who forks first. Runs as a daemon. HUPs.
5532: Uses IDEA encryption
5533:
1.74 harris41 5534: B<lond> forks off children processes that correspond to the other servers
5535: in the network. Management of these processes can be done at the
5536: parent process level or the child process level.
5537:
5538: B<logs/lond.log> is the location of log messages.
5539:
5540: The process management is now explained in terms of linux shell commands,
5541: subroutines internal to this code, and signal assignments:
5542:
5543: =over 4
5544:
5545: =item *
5546:
5547: PID is stored in B<logs/lond.pid>
5548:
5549: This is the process id number of the parent B<lond> process.
5550:
5551: =item *
5552:
5553: SIGTERM and SIGINT
5554:
5555: Parent signal assignment:
5556: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
5557:
5558: Child signal assignment:
5559: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
5560: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
5561: to restart a new child.)
5562:
5563: Command-line invocations:
5564: B<kill> B<-s> SIGTERM I<PID>
5565: B<kill> B<-s> SIGINT I<PID>
5566:
5567: Subroutine B<HUNTSMAN>:
5568: This is only invoked for the B<lond> parent I<PID>.
5569: This kills all the children, and then the parent.
5570: The B<lonc.pid> file is cleared.
5571:
5572: =item *
5573:
5574: SIGHUP
5575:
5576: Current bug:
5577: This signal can only be processed the first time
5578: on the parent process. Subsequent SIGHUP signals
5579: have no effect.
5580:
5581: Parent signal assignment:
5582: $SIG{HUP} = \&HUPSMAN;
5583:
5584: Child signal assignment:
5585: none (nothing happens)
5586:
5587: Command-line invocations:
5588: B<kill> B<-s> SIGHUP I<PID>
5589:
5590: Subroutine B<HUPSMAN>:
5591: This is only invoked for the B<lond> parent I<PID>,
5592: This kills all the children, and then the parent.
5593: The B<lond.pid> file is cleared.
5594:
5595: =item *
5596:
5597: SIGUSR1
5598:
5599: Parent signal assignment:
5600: $SIG{USR1} = \&USRMAN;
5601:
5602: Child signal assignment:
5603: $SIG{USR1}= \&logstatus;
5604:
5605: Command-line invocations:
5606: B<kill> B<-s> SIGUSR1 I<PID>
5607:
5608: Subroutine B<USRMAN>:
5609: When invoked for the B<lond> parent I<PID>,
5610: SIGUSR1 is sent to all the children, and the status of
5611: each connection is logged.
1.144 foxr 5612:
5613: =item *
5614:
5615: SIGUSR2
5616:
5617: Parent Signal assignment:
5618: $SIG{USR2} = \&UpdateHosts
5619:
5620: Child signal assignment:
5621: NONE
5622:
1.74 harris41 5623:
5624: =item *
5625:
5626: SIGCHLD
5627:
5628: Parent signal assignment:
5629: $SIG{CHLD} = \&REAPER;
5630:
5631: Child signal assignment:
5632: none
5633:
5634: Command-line invocations:
5635: B<kill> B<-s> SIGCHLD I<PID>
5636:
5637: Subroutine B<REAPER>:
5638: This is only invoked for the B<lond> parent I<PID>.
5639: Information pertaining to the child is removed.
5640: The socket port is cleaned up.
5641:
5642: =back
5643:
5644: B<SERVER-SIDE ACTIVITIES>
5645:
5646: Server-side information can be accepted in an encrypted or non-encrypted
5647: method.
5648:
5649: =over 4
5650:
5651: =item ping
5652:
5653: Query a client in the hosts.tab table; "Are you there?"
5654:
5655: =item pong
5656:
5657: Respond to a ping query.
5658:
5659: =item ekey
5660:
5661: Read in encrypted key, make cipher. Respond with a buildkey.
5662:
5663: =item load
5664:
5665: Respond with CPU load based on a computation upon /proc/loadavg.
5666:
5667: =item currentauth
5668:
5669: Reply with current authentication information (only over an
5670: encrypted channel).
5671:
5672: =item auth
5673:
5674: Only over an encrypted channel, reply as to whether a user's
5675: authentication information can be validated.
5676:
5677: =item passwd
5678:
5679: Allow for a password to be set.
5680:
5681: =item makeuser
5682:
5683: Make a user.
5684:
5685: =item passwd
5686:
5687: Allow for authentication mechanism and password to be changed.
5688:
5689: =item home
1.61 harris41 5690:
1.74 harris41 5691: Respond to a question "are you the home for a given user?"
5692:
5693: =item update
5694:
5695: Update contents of a subscribed resource.
5696:
5697: =item unsubscribe
5698:
5699: The server is unsubscribing from a resource.
5700:
5701: =item subscribe
5702:
5703: The server is subscribing to a resource.
5704:
5705: =item log
5706:
5707: Place in B<logs/lond.log>
5708:
5709: =item put
5710:
5711: stores hash in namespace
5712:
1.230 foxr 5713: =item rolesputy
1.74 harris41 5714:
5715: put a role into a user's environment
5716:
5717: =item get
5718:
5719: returns hash with keys from array
5720: reference filled in from namespace
5721:
5722: =item eget
5723:
5724: returns hash with keys from array
5725: reference filled in from namesp (encrypts the return communication)
5726:
5727: =item rolesget
5728:
5729: get a role from a user's environment
5730:
5731: =item del
5732:
5733: deletes keys out of array from namespace
5734:
5735: =item keys
5736:
5737: returns namespace keys
5738:
5739: =item dump
5740:
5741: dumps the complete (or key matching regexp) namespace into a hash
5742:
5743: =item store
5744:
5745: stores hash permanently
5746: for this url; hashref needs to be given and should be a \%hashname; the
5747: remaining args aren't required and if they aren't passed or are '' they will
5748: be derived from the ENV
5749:
5750: =item restore
5751:
5752: returns a hash for a given url
5753:
5754: =item querysend
5755:
5756: Tells client about the lonsql process that has been launched in response
5757: to a sent query.
5758:
5759: =item queryreply
5760:
5761: Accept information from lonsql and make appropriate storage in temporary
5762: file space.
5763:
5764: =item idput
5765:
5766: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
5767: for each student, defined perhaps by the institutional Registrar.)
5768:
5769: =item idget
5770:
5771: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
5772: for each student, defined perhaps by the institutional Registrar.)
5773:
5774: =item tmpput
5775:
5776: Accept and store information in temporary space.
5777:
5778: =item tmpget
5779:
5780: Send along temporarily stored information.
5781:
5782: =item ls
5783:
5784: List part of a user's directory.
5785:
1.135 foxr 5786: =item pushtable
5787:
5788: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
5789: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
5790: must be restored manually in case of a problem with the new table file.
5791: pushtable requires that the request be encrypted and validated via
5792: ValidateManager. The form of the command is:
5793: enc:pushtable tablename <tablecontents> \n
5794: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
5795: cleartext newline.
5796:
1.74 harris41 5797: =item Hanging up (exit or init)
5798:
5799: What to do when a client tells the server that they (the client)
5800: are leaving the network.
5801:
5802: =item unknown command
5803:
5804: If B<lond> is sent an unknown command (not in the list above),
5805: it replys to the client "unknown_cmd".
1.135 foxr 5806:
1.74 harris41 5807:
5808: =item UNKNOWN CLIENT
5809:
5810: If the anti-spoofing algorithm cannot verify the client,
5811: the client is rejected (with a "refused" message sent
5812: to the client, and the connection is closed.
5813:
5814: =back
1.61 harris41 5815:
5816: =head1 PREREQUISITES
5817:
5818: IO::Socket
5819: IO::File
5820: Apache::File
5821: Symbol
5822: POSIX
5823: Crypt::IDEA
5824: LWP::UserAgent()
5825: GDBM_File
5826: Authen::Krb4
1.91 albertel 5827: Authen::Krb5
1.61 harris41 5828:
5829: =head1 COREQUISITES
5830:
5831: =head1 OSNAMES
5832:
5833: linux
5834:
5835: =head1 SCRIPT CATEGORIES
5836:
5837: Server/Process
5838:
5839: =cut
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