Annotation of loncom/lond, revision 1.226
1.1 albertel 1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
1.60 www 4: #
1.226 ! foxr 5: # $Id: lond,v 1.225 2004/08/09 10:34:18 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:
1.225 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:
1.226 ! foxr 60: my $VERSION='$Revision: 1.225 $'; #' 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:
1285:
1286:
1287: # Process a reinit request. Reinit requests that either
1288: # lonc or lond be reinitialized so that an updated
1289: # host.tab or domain.tab can be processed.
1290: #
1291: # Parameters:
1292: # $cmd - the actual keyword that invoked us.
1293: # $tail - the tail of the request that invoked us.
1294: # $client - File descriptor connected to the client
1295: # Returns:
1296: # 1 - Ok to continue processing.
1297: # 0 - Program should exit
1298: # Implicit output:
1299: # a reply is sent to the client.
1300: #
1301: sub reinit_process_handler {
1302: my ($cmd, $tail, $client) = @_;
1303:
1304: my $userinput = "$cmd:$tail";
1305:
1306: my $cert = &GetCertificate($userinput);
1307: if(&ValidManager($cert)) {
1308: chomp($userinput);
1309: my $reply = &ReinitProcess($userinput);
1310: &Reply( $client, "$reply\n", $userinput);
1311: } else {
1312: &Failure( $client, "refused\n", $userinput);
1313: }
1314: return 1;
1315: }
1316:
1317: ®ister_handler("reinit", \&reinit_process_handler, 1, 0, 1);
1318:
1319: # Process the editing script for a table edit operation.
1320: # the editing operation must be encrypted and requested by
1321: # a manager host.
1322: #
1323: # Parameters:
1324: # $cmd - the actual keyword that invoked us.
1325: # $tail - the tail of the request that invoked us.
1326: # $client - File descriptor connected to the client
1327: # Returns:
1328: # 1 - Ok to continue processing.
1329: # 0 - Program should exit
1330: # Implicit output:
1331: # a reply is sent to the client.
1332: #
1333: sub edit_table_handler {
1334: my ($command, $tail, $client) = @_;
1335:
1336: my $userinput = "$command:$tail";
1337:
1338: my $cert = &GetCertificate($userinput);
1339: if(&ValidManager($cert)) {
1340: my($filetype, $script) = split(/:/, $tail);
1341: if (($filetype eq "hosts") ||
1342: ($filetype eq "domain")) {
1343: if($script ne "") {
1344: &Reply($client, # BUGBUG - EditFile
1345: &EditFile($userinput), # could fail.
1346: $userinput);
1347: } else {
1348: &Failure($client,"refused\n",$userinput);
1349: }
1350: } else {
1351: &Failure($client,"refused\n",$userinput);
1352: }
1353: } else {
1354: &Failure($client,"refused\n",$userinput);
1355: }
1356: return 1;
1357: }
1358: register_handler("edit", \&edit_table_handler, 1, 0, 1);
1359:
1360:
1.220 foxr 1361: #
1362: # Authenticate a user against the LonCAPA authentication
1363: # database. Note that there are several authentication
1364: # possibilities:
1365: # - unix - The user can be authenticated against the unix
1366: # password file.
1367: # - internal - The user can be authenticated against a purely
1368: # internal per user password file.
1369: # - kerberos - The user can be authenticated against either a kerb4 or kerb5
1370: # ticket granting authority.
1371: # - user - The person tailoring LonCAPA can supply a user authentication
1372: # mechanism that is per system.
1373: #
1374: # Parameters:
1375: # $cmd - The command that got us here.
1376: # $tail - Tail of the command (remaining parameters).
1377: # $client - File descriptor connected to client.
1378: # Returns
1379: # 0 - Requested to exit, caller should shut down.
1380: # 1 - Continue processing.
1381: # Implicit inputs:
1382: # The authentication systems describe above have their own forms of implicit
1383: # input into the authentication process that are described above.
1384: #
1385: sub authenticate_handler {
1386: my ($cmd, $tail, $client) = @_;
1387:
1388:
1389: # Regenerate the full input line
1390:
1391: my $userinput = $cmd.":".$tail;
1392:
1393: # udom - User's domain.
1394: # uname - Username.
1395: # upass - User's password.
1396:
1397: my ($udom,$uname,$upass)=split(/:/,$tail);
1398: &Debug(" Authenticate domain = $udom, user = $uname, password = $upass");
1399: chomp($upass);
1400: $upass=&unescape($upass);
1401:
1402: my $pwdcorrect = &validate_user($udom, $uname, $upass);
1403: if($pwdcorrect) {
1404: &Reply( $client, "authorized\n", $userinput);
1405: #
1406: # Bad credentials: Failed to authorize
1407: #
1408: } else {
1409: &Failure( $client, "non_authorized\n", $userinput);
1410: }
1411:
1412: return 1;
1413: }
1.218 foxr 1414:
1.220 foxr 1415: register_handler("auth", \&authenticate_handler, 1, 1, 0);
1.214 foxr 1416:
1.222 foxr 1417: #
1418: # Change a user's password. Note that this function is complicated by
1419: # the fact that a user may be authenticated in more than one way:
1420: # At present, we are not able to change the password for all types of
1421: # authentication methods. Only for:
1422: # unix - unix password or shadow passoword style authentication.
1423: # local - Locally written authentication mechanism.
1424: # For now, kerb4 and kerb5 password changes are not supported and result
1425: # in an error.
1426: # FUTURE WORK:
1427: # Support kerberos passwd changes?
1428: # Parameters:
1429: # $cmd - The command that got us here.
1430: # $tail - Tail of the command (remaining parameters).
1431: # $client - File descriptor connected to client.
1432: # Returns
1433: # 0 - Requested to exit, caller should shut down.
1434: # 1 - Continue processing.
1435: # Implicit inputs:
1436: # The authentication systems describe above have their own forms of implicit
1437: # input into the authentication process that are described above.
1438: sub change_password_handler {
1439: my ($cmd, $tail, $client) = @_;
1440:
1441: my $userinput = $cmd.":".$tail; # Reconstruct client's string.
1442:
1443: #
1444: # udom - user's domain.
1445: # uname - Username.
1446: # upass - Current password.
1447: # npass - New password.
1448:
1449: my ($udom,$uname,$upass,$npass)=split(/:/,$tail);
1450:
1451: $upass=&unescape($upass);
1452: $npass=&unescape($npass);
1453: &Debug("Trying to change password for $uname");
1454:
1455: # First require that the user can be authenticated with their
1456: # old password:
1457:
1458: my $validated = &validate_user($udom, $uname, $upass);
1459: if($validated) {
1460: my $realpasswd = &get_auth_type($udom, $uname); # Defined since authd.
1461:
1462: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1463: if ($howpwd eq 'internal') {
1464: &Debug("internal auth");
1465: my $salt=time;
1466: $salt=substr($salt,6,2);
1467: my $ncpass=crypt($npass,$salt);
1468: if(&rewrite_password_file($udom, $uname, "internal:$ncpass")) {
1469: &logthis("Result of password change for "
1470: ."$uname: pwchange_success");
1471: &Reply($client, "ok\n", $userinput);
1472: } else {
1473: &logthis("Unable to open $uname passwd "
1474: ."to change password");
1475: &Failure( $client, "non_authorized\n",$userinput);
1476: }
1477: } elsif ($howpwd eq 'unix') {
1478: # Unix means we have to access /etc/password
1479: &Debug("auth is unix");
1480: my $execdir=$perlvar{'lonDaemons'};
1481: &Debug("Opening lcpasswd pipeline");
1482: my $pf = IO::File->new("|$execdir/lcpasswd > "
1483: ."$perlvar{'lonDaemons'}"
1484: ."/logs/lcpasswd.log");
1485: print $pf "$uname\n$npass\n$npass\n";
1486: close $pf;
1487: my $err = $?;
1488: my $result = ($err>0 ? 'pwchange_failure' : 'ok');
1489: &logthis("Result of password change for $uname: ".
1490: &lcpasswdstrerror($?));
1491: &Reply($client, "$result\n", $userinput);
1492: } else {
1493: # this just means that the current password mode is not
1494: # one we know how to change (e.g the kerberos auth modes or
1495: # locally written auth handler).
1496: #
1497: &Failure( $client, "auth_mode_error\n", $userinput);
1498: }
1499:
1.224 foxr 1500: } else {
1.222 foxr 1501: &Failure( $client, "non_authorized\n", $userinput);
1502: }
1503:
1504: return 1;
1505: }
1506: register_handler("passwd", \&change_password_handler, 1, 1, 0);
1507:
1508:
1.225 foxr 1509: #
1510: # Create a new user. User in this case means a lon-capa user.
1511: # The user must either already exist in some authentication realm
1512: # like kerberos or the /etc/passwd. If not, a user completely local to
1513: # this loncapa system is created.
1514: #
1515: # Parameters:
1516: # $cmd - The command that got us here.
1517: # $tail - Tail of the command (remaining parameters).
1518: # $client - File descriptor connected to client.
1519: # Returns
1520: # 0 - Requested to exit, caller should shut down.
1521: # 1 - Continue processing.
1522: # Implicit inputs:
1523: # The authentication systems describe above have their own forms of implicit
1524: # input into the authentication process that are described above.
1525: sub add_user_handler {
1526:
1527: my ($cmd, $tail, $client) = @_;
1528:
1529:
1530: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
1531: my $userinput = $cmd.":".$tail; # Reconstruct the full request line.
1532:
1533: &Debug("cmd =".$cmd." $udom =".$udom." uname=".$uname);
1534:
1535:
1536: if($udom eq $currentdomainid) { # Reject new users for other domains...
1537:
1538: my $oldumask=umask(0077);
1539: chomp($npass);
1540: $npass=&unescape($npass);
1541: my $passfilename = &password_path($udom, $uname);
1542: &Debug("Password file created will be:".$passfilename);
1543: if (-e $passfilename) {
1544: &Failure( $client, "already_exists\n", $userinput);
1545: } else {
1546: my @fpparts=split(/\//,$passfilename);
1547: my $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
1548: my $fperror='';
1549: for (my $i=3;$i<= ($#fpparts-1);$i++) {
1550: $fpnow.='/'.$fpparts[$i];
1551: unless (-e $fpnow) {
1552: &logthis("mkdir $fpnow");
1553: unless (mkdir($fpnow,0777)) {
1554: $fperror="error: ".($!+0)." mkdir failed while attempting "
1555: ."makeuser";
1556: }
1557: }
1558: }
1559: unless ($fperror) {
1560: my $result=&make_passwd_file($uname, $umode,$npass, $passfilename);
1561: &Reply($client, $result, $userinput); #BUGBUG - could be fail
1562: } else {
1563: &Failure($client, "$fperror\n", $userinput);
1564: }
1565: }
1566: umask($oldumask);
1567: } else {
1568: &Failure($client, "not_right_domain\n",
1569: $userinput); # Even if we are multihomed.
1570:
1571: }
1572: return 1;
1573:
1574: }
1575: ®ister_handler("makeuser", \&add_user_handler, 1, 1, 0);
1576:
1577: #
1578: # Change the authentication method of a user. Note that this may
1579: # also implicitly change the user's password if, for example, the user is
1580: # joining an existing authentication realm. Known authentication realms at
1581: # this time are:
1582: # internal - Purely internal password file (only loncapa knows this user)
1583: # local - Institutionally written authentication module.
1584: # unix - Unix user (/etc/passwd with or without /etc/shadow).
1585: # kerb4 - kerberos version 4
1586: # kerb5 - kerberos version 5
1587: #
1588: # Parameters:
1589: # $cmd - The command that got us here.
1590: # $tail - Tail of the command (remaining parameters).
1591: # $client - File descriptor connected to client.
1592: # Returns
1593: # 0 - Requested to exit, caller should shut down.
1594: # 1 - Continue processing.
1595: # Implicit inputs:
1596: # The authentication systems describe above have their own forms of implicit
1597: # input into the authentication process that are described above.
1598: #
1599: sub change_authentication_handler {
1600:
1601: my ($cmd, $tail, $client) = @_;
1602:
1603: my $userinput = "$cmd:$tail"; # Reconstruct user input.
1604:
1605: my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
1606: &Debug("cmd = ".$cmd." domain= ".$udom."uname =".$uname." umode= ".$umode);
1607: if ($udom ne $currentdomainid) {
1608: &Failure( $client, "not_right_domain\n", $client);
1609: } else {
1610:
1611: chomp($npass);
1612:
1613: $npass=&unescape($npass);
1614: my $passfilename = &password_path($udom, $uname);
1615: if ($passfilename) { # Not allowed to create a new user!!
1616: my $result=&make_passwd_file($uname, $umode,$npass,$passfilename);
1617: &Reply($client, $result, $userinput);
1618: } else {
1619: &Failure($client, "non_authorized", $userinput); # Fail the user now.
1620: }
1621: }
1622: return 1;
1623: }
1624: ®ister_handler("changeuserauth", \&change_authentication_handler, 1,1, 0);
1625:
1626: #
1627: # Determines if this is the home server for a user. The home server
1628: # for a user will have his/her lon-capa passwd file. Therefore all we need
1629: # to do is determine if this file exists.
1630: #
1631: # Parameters:
1632: # $cmd - The command that got us here.
1633: # $tail - Tail of the command (remaining parameters).
1634: # $client - File descriptor connected to client.
1635: # Returns
1636: # 0 - Requested to exit, caller should shut down.
1637: # 1 - Continue processing.
1638: # Implicit inputs:
1639: # The authentication systems describe above have their own forms of implicit
1640: # input into the authentication process that are described above.
1641: #
1642: sub is_home_handler {
1643: my ($cmd, $tail, $client) = @_;
1644:
1645: my $userinput = "$cmd:$tail";
1646:
1647: my ($udom,$uname)=split(/:/,$tail);
1648: chomp($uname);
1649: my $passfile = &password_filename($udom, $uname);
1650: if($passfile) {
1651: &Reply( $client, "found\n", $userinput);
1652: } else {
1653: &Failure($client, "not_found\n", $userinput);
1654: }
1655: return 1;
1656: }
1657: ®ister_handler("home", \&is_home_handler, 0,1,0);
1658:
1659: #
1660: # Process an update request for a resource?? I think what's going on here is
1661: # that a resource has been modified that we hold a subscription to.
1662: # If the resource is not local, then we must update, or at least invalidate our
1663: # cached copy of the resource.
1664: # FUTURE WORK:
1665: # I need to look at this logic carefully. My druthers would be to follow
1666: # typical caching logic, and simple invalidate the cache, drop any subscription
1667: # an let the next fetch start the ball rolling again... however that may
1668: # actually be more difficult than it looks given the complex web of
1669: # proxy servers.
1670: # Parameters:
1671: # $cmd - The command that got us here.
1672: # $tail - Tail of the command (remaining parameters).
1673: # $client - File descriptor connected to client.
1674: # Returns
1675: # 0 - Requested to exit, caller should shut down.
1676: # 1 - Continue processing.
1677: # Implicit inputs:
1678: # The authentication systems describe above have their own forms of implicit
1679: # input into the authentication process that are described above.
1680: #
1681: sub update_resource_handler {
1682:
1683: my ($cmd, $tail, $client) = @_;
1684:
1685: my $userinput = "$cmd:$tail";
1686:
1687: my $fname= $tail; # This allows interactive testing
1688:
1689:
1690: my $ownership=ishome($fname);
1691: if ($ownership eq 'not_owner') {
1692: if (-e $fname) {
1693: my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
1694: $atime,$mtime,$ctime,$blksize,$blocks)=stat($fname);
1695: my $now=time;
1696: my $since=$now-$atime;
1697: if ($since>$perlvar{'lonExpire'}) {
1698: my $reply=&reply("unsub:$fname","$clientname");
1699: unlink("$fname");
1700: } else {
1701: my $transname="$fname.in.transfer";
1702: my $remoteurl=&reply("sub:$fname","$clientname");
1703: my $response;
1704: alarm(120);
1705: {
1706: my $ua=new LWP::UserAgent;
1707: my $request=new HTTP::Request('GET',"$remoteurl");
1708: $response=$ua->request($request,$transname);
1709: }
1710: alarm(0);
1711: if ($response->is_error()) {
1712: unlink($transname);
1713: my $message=$response->status_line;
1714: &logthis("LWP GET: $message for $fname ($remoteurl)");
1715: } else {
1716: if ($remoteurl!~/\.meta$/) {
1717: alarm(120);
1718: {
1719: my $ua=new LWP::UserAgent;
1720: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1721: my $mresponse=$ua->request($mrequest,$fname.'.meta');
1722: if ($mresponse->is_error()) {
1723: unlink($fname.'.meta');
1724: }
1725: }
1726: alarm(0);
1727: }
1728: rename($transname,$fname);
1729: }
1730: }
1731: &Reply( $client, "ok\n", $userinput);
1732: } else {
1733: &Failure($client, "not_found\n", $userinput);
1734: }
1735: } else {
1736: &Failure($client, "rejected\n", $userinput);
1737: }
1738: return 1;
1739: }
1740: ®ister_handler("update", \&update_resource_handler, 0 ,1, 0);
1741:
1742: #
1.226 ! foxr 1743: # Fetch a user file from a remote server to the user's home directory
! 1744: # userfiles subdir.
1.225 foxr 1745: # Parameters:
1746: # $cmd - The command that got us here.
1747: # $tail - Tail of the command (remaining parameters).
1748: # $client - File descriptor connected to client.
1749: # Returns
1750: # 0 - Requested to exit, caller should shut down.
1751: # 1 - Continue processing.
1752: #
1753: sub fetch_user_file_handler {
1754:
1755: my ($cmd, $tail, $client) = @_;
1756:
1757: my $userinput = "$cmd:$tail";
1758: my $fname = $tail;
1759: my ($udom,$uname,$ufile)=split(/\//,$fname);
1760: my $udir=&propath($udom,$uname).'/userfiles';
1761: unless (-e $udir) {
1762: mkdir($udir,0770);
1763: }
1764: if (-e $udir) {
1765: $ufile=~s/^[\.\~]+//;
1766: $ufile=~s/\///g;
1767: my $destname=$udir.'/'.$ufile;
1768: my $transname=$udir.'/'.$ufile.'.in.transit';
1769: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
1770: my $response;
1771: alarm(120);
1772: {
1773: my $ua=new LWP::UserAgent;
1774: my $request=new HTTP::Request('GET',"$remoteurl");
1775: $response=$ua->request($request,$transname);
1776: }
1777: alarm(0);
1778: if ($response->is_error()) {
1779: unlink($transname);
1780: my $message=$response->status_line;
1781: &logthis("LWP GET: $message for $fname ($remoteurl)");
1782: &Failure($client, "failed\n", $userinput);
1783: } else {
1784: if (!rename($transname,$destname)) {
1785: &logthis("Unable to move $transname to $destname");
1786: unlink($transname);
1787: &Failure($client, "failed\n", $userinput);
1788: } else {
1789: &Reply($client, "ok\n", $userinput);
1790: }
1791: }
1792: } else {
1793: &Failure($client, "not_home\n", $userinput);
1794: }
1795: return 1;
1796: }
1797: ®ister_handler("fetchuserfile", \&fetch_user_file_handler, 0, 1, 0);
1798:
1.226 ! foxr 1799: #
! 1800: # Remove a file from a user's home directory userfiles subdirectory.
! 1801: # Parameters:
! 1802: # cmd - the Lond request keyword that got us here.
! 1803: # tail - the part of the command past the keyword.
! 1804: # client- File descriptor connected with the client.
! 1805: #
! 1806: # Returns:
! 1807: # 1 - Continue processing.
! 1808:
! 1809: sub remove_user_file_handler {
! 1810: my ($cmd, $tail, $client) = @_;
! 1811:
! 1812: my ($fname) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
! 1813:
! 1814: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
! 1815: &logthis("$udom - $uname - $ufile");
! 1816: if ($ufile =~m|/\.\./|) {
! 1817: # any files paths with /../ in them refuse
! 1818: # to deal with
! 1819: &Failure($client, "refused\n", "$cmd:$tail");
! 1820: } else {
! 1821: my $udir = &propath($udom,$uname);
! 1822: if (-e $udir) {
! 1823: my $file=$udir.'/userfiles/'.$ufile;
! 1824: if (-e $file) {
! 1825: unlink($file);
! 1826: if (-e $file) {
! 1827: &Failure($client, "failed\n", "$cmd:$tail");
! 1828: } else {
! 1829: &Reply($client, "ok\n", "$cmd:$tail");
! 1830: }
! 1831: } else {
! 1832: &Failure($client, "not_found\n", "$cmd:$tail");
! 1833: }
! 1834: } else {
! 1835: &Failure($client, "not_home\n", "$cmd:$tail");
! 1836: }
! 1837: }
! 1838: return 1;
! 1839: }
! 1840: ®ister_handler("removeuserfile", \&remove_user_file_handler, 0,1,0);
! 1841:
1.207 foxr 1842: #---------------------------------------------------------------
1843: #
1844: # Getting, decoding and dispatching requests:
1845: #
1846:
1847: #
1848: # Get a Request:
1849: # Gets a Request message from the client. The transaction
1850: # is defined as a 'line' of text. We remove the new line
1851: # from the text line.
1.226 ! foxr 1852: #
1.211 albertel 1853: sub get_request {
1.207 foxr 1854: my $input = <$client>;
1855: chomp($input);
1.226 ! foxr 1856:
1.212 foxr 1857: Debug("get_request: Request = $input\n");
1.207 foxr 1858:
1859: &status('Processing '.$clientname.':'.$input);
1860:
1861: return $input;
1862: }
1.212 foxr 1863: #---------------------------------------------------------------
1864: #
1865: # Process a request. This sub should shrink as each action
1866: # gets farmed out into a separat sub that is registered
1867: # with the dispatch hash.
1868: #
1869: # Parameters:
1870: # user_input - The request received from the client (lonc).
1871: # Returns:
1872: # true to keep processing, false if caller should exit.
1873: #
1874: sub process_request {
1875: my ($userinput) = @_; # Easier for now to break style than to
1876: # fix all the userinput -> user_input.
1877: my $wasenc = 0; # True if request was encrypted.
1878: # ------------------------------------------------------------ See if encrypted
1879: if ($userinput =~ /^enc/) {
1880: $userinput = decipher($userinput);
1881: $wasenc=1;
1882: if(!$userinput) { # Cipher not defined.
1883: &Failure($client, "error: Encrypted data without negotated key");
1884: return 0;
1885: }
1886: }
1887: Debug("process_request: $userinput\n");
1888:
1.213 foxr 1889: #
1890: # The 'correct way' to add a command to lond is now to
1891: # write a sub to execute it and Add it to the command dispatch
1892: # hash via a call to register_handler.. The comments to that
1893: # sub should give you enough to go on to show how to do this
1894: # along with the examples that are building up as this code
1895: # is getting refactored. Until all branches of the
1896: # if/elseif monster below have been factored out into
1897: # separate procesor subs, if the dispatch hash is missing
1898: # the command keyword, we will fall through to the remainder
1899: # of the if/else chain below in order to keep this thing in
1900: # working order throughout the transmogrification.
1901:
1902: my ($command, $tail) = split(/:/, $userinput, 2);
1903: chomp($command);
1904: chomp($tail);
1905: $tail =~ s/(\r)//; # This helps people debugging with e.g. telnet.
1.214 foxr 1906: $command =~ s/(\r)//; # And this too for parameterless commands.
1907: if(!$tail) {
1908: $tail =""; # defined but blank.
1909: }
1.213 foxr 1910:
1911: &Debug("Command received: $command, encoded = $wasenc");
1912:
1913: if(defined $Dispatcher{$command}) {
1914:
1915: my $dispatch_info = $Dispatcher{$command};
1916: my $handler = $$dispatch_info[0];
1917: my $need_encode = $$dispatch_info[1];
1918: my $client_types = $$dispatch_info[2];
1919: Debug("Matched dispatch hash: mustencode: $need_encode "
1920: ."ClientType $client_types");
1921:
1922: # Validate the request:
1923:
1924: my $ok = 1;
1925: my $requesterprivs = 0;
1926: if(&isClient()) {
1927: $requesterprivs |= $CLIENT_OK;
1928: }
1929: if(&isManager()) {
1930: $requesterprivs |= $MANAGER_OK;
1931: }
1932: if($need_encode && (!$wasenc)) {
1933: Debug("Must encode but wasn't: $need_encode $wasenc");
1934: $ok = 0;
1935: }
1936: if(($client_types & $requesterprivs) == 0) {
1937: Debug("Client not privileged to do this operation");
1938: $ok = 0;
1939: }
1940:
1941: if($ok) {
1942: Debug("Dispatching to handler $command $tail");
1943: my $keep_going = &$handler($command, $tail, $client);
1944: return $keep_going;
1945: } else {
1946: Debug("Refusing to dispatch because client did not match requirements");
1947: Failure($client, "refused\n", $userinput);
1948: return 1;
1949: }
1950:
1951: }
1952:
1.215 foxr 1953: #------------------- Commands not yet in spearate handlers. --------------
1954:
1.218 foxr 1955:
1.226 ! foxr 1956:
1.212 foxr 1957: # ------------------------------------------ authenticate access to a user file
1.226 ! foxr 1958:
! 1959: if ($userinput =~ /^tokenauthuserfile/) { # Client only
1.212 foxr 1960: if(isClient) {
1961: my ($cmd,$fname,$session)=split(/:/,$userinput);
1962: chomp($session);
1963: my $reply='non_auth';
1964: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
1965: $session.'.id')) {
1966: while (my $line=<ENVIN>) {
1967: if ($line=~ m|userfile\.\Q$fname\E\=|) { $reply='ok'; }
1968: }
1969: close(ENVIN);
1970: print $client $reply."\n";
1971: } else {
1972: print $client "invalid_token\n";
1973: }
1974: } else {
1975: Reply($client, "refused\n", $userinput);
1976:
1977: }
1978: # ----------------------------------------------------------------- unsubscribe
1979: } elsif ($userinput =~ /^unsub/) {
1980: if(isClient) {
1981: my ($cmd,$fname)=split(/:/,$userinput);
1982: if (-e $fname) {
1983: print $client &unsub($fname,$clientip);
1984: } else {
1985: print $client "not_found\n";
1986: }
1987: } else {
1988: Reply($client, "refused\n", $userinput);
1989:
1990: }
1991: # ------------------------------------------------------------------- subscribe
1992: } elsif ($userinput =~ /^sub/) {
1993: if(isClient) {
1994: print $client &subscribe($userinput,$clientip);
1995: } else {
1996: Reply($client, "refused\n", $userinput);
1997:
1998: }
1999: # ------------------------------------------------------------- current version
2000: } elsif ($userinput =~ /^currentversion/) {
2001: if(isClient) {
2002: my ($cmd,$fname)=split(/:/,$userinput);
2003: print $client ¤tversion($fname)."\n";
2004: } else {
2005: Reply($client, "refused\n", $userinput);
2006:
2007: }
2008: # ------------------------------------------------------------------------- log
2009: } elsif ($userinput =~ /^log/) {
2010: if(isClient) {
2011: my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
2012: chomp($what);
2013: my $proname=propath($udom,$uname);
2014: my $now=time;
2015: {
2016: my $hfh;
2017: if ($hfh=IO::File->new(">>$proname/activity.log")) {
2018: print $hfh "$now:$clientname:$what\n";
2019: print $client "ok\n";
2020: } else {
2021: print $client "error: ".($!+0)
2022: ." IO::File->new Failed "
2023: ."while attempting log\n";
2024: }
2025: }
2026: } else {
2027: Reply($client, "refused\n", $userinput);
2028:
2029: }
2030: # ------------------------------------------------------------------------- put
2031: } elsif ($userinput =~ /^put/) {
2032: if(isClient) {
2033: my ($cmd,$udom,$uname,$namespace,$what)
2034: =split(/:/,$userinput,5);
2035: $namespace=~s/\//\_/g;
2036: $namespace=~s/\W//g;
2037: if ($namespace ne 'roles') {
2038: chomp($what);
2039: my $proname=propath($udom,$uname);
2040: my $now=time;
2041: my @pairs=split(/\&/,$what);
2042: my %hash;
2043: if (tie(%hash,'GDBM_File',
2044: "$proname/$namespace.db",
2045: &GDBM_WRCREAT(),0640)) {
2046: unless ($namespace=~/^nohist\_/) {
2047: my $hfh;
2048: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) { print $hfh "P:$now:$what\n"; }
2049: }
2050:
2051: foreach my $pair (@pairs) {
2052: my ($key,$value)=split(/=/,$pair);
2053: $hash{$key}=$value;
2054: }
2055: if (untie(%hash)) {
2056: print $client "ok\n";
2057: } else {
2058: print $client "error: ".($!+0)
2059: ." untie(GDBM) failed ".
2060: "while attempting put\n";
2061: }
2062: } else {
2063: print $client "error: ".($!)
2064: ." tie(GDBM) Failed ".
2065: "while attempting put\n";
2066: }
2067: } else {
2068: print $client "refused\n";
2069: }
2070: } else {
2071: Reply($client, "refused\n", $userinput);
2072:
2073: }
2074: # ------------------------------------------------------------------- inc
2075: } elsif ($userinput =~ /^inc:/) {
2076: if(isClient) {
2077: my ($cmd,$udom,$uname,$namespace,$what)
2078: =split(/:/,$userinput);
2079: $namespace=~s/\//\_/g;
2080: $namespace=~s/\W//g;
2081: if ($namespace ne 'roles') {
2082: chomp($what);
2083: my $proname=propath($udom,$uname);
2084: my $now=time;
2085: my @pairs=split(/\&/,$what);
2086: my %hash;
2087: if (tie(%hash,'GDBM_File',
2088: "$proname/$namespace.db",
2089: &GDBM_WRCREAT(),0640)) {
2090: unless ($namespace=~/^nohist\_/) {
2091: my $hfh;
2092: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) { print $hfh "P:$now:$what\n"; }
2093: }
2094: foreach my $pair (@pairs) {
2095: my ($key,$value)=split(/=/,$pair);
2096: # We could check that we have a number...
2097: if (! defined($value) || $value eq '') {
2098: $value = 1;
2099: }
2100: $hash{$key}+=$value;
2101: }
2102: if (untie(%hash)) {
2103: print $client "ok\n";
2104: } else {
2105: print $client "error: ".($!+0)
2106: ." untie(GDBM) failed ".
2107: "while attempting inc\n";
2108: }
2109: } else {
2110: print $client "error: ".($!)
2111: ." tie(GDBM) Failed ".
2112: "while attempting inc\n";
2113: }
2114: } else {
2115: print $client "refused\n";
2116: }
2117: } else {
2118: Reply($client, "refused\n", $userinput);
2119:
2120: }
2121: # -------------------------------------------------------------------- rolesput
2122: } elsif ($userinput =~ /^rolesput/) {
2123: if(isClient) {
2124: &Debug("rolesput");
2125: if ($wasenc==1) {
2126: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
2127: =split(/:/,$userinput);
2128: &Debug("cmd = ".$cmd." exedom= ".$exedom.
2129: "user = ".$exeuser." udom=".$udom.
2130: "what = ".$what);
2131: my $namespace='roles';
2132: chomp($what);
2133: my $proname=propath($udom,$uname);
2134: my $now=time;
2135: my @pairs=split(/\&/,$what);
2136: my %hash;
2137: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2138: {
2139: my $hfh;
2140: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) {
2141: print $hfh "P:$now:$exedom:$exeuser:$what\n";
2142: }
2143: }
2144:
2145: foreach my $pair (@pairs) {
2146: my ($key,$value)=split(/=/,$pair);
2147: &ManagePermissions($key, $udom, $uname,
1.222 foxr 2148: &get_auth_type( $udom,
1.212 foxr 2149: $uname));
2150: $hash{$key}=$value;
2151: }
2152: if (untie(%hash)) {
2153: print $client "ok\n";
2154: } else {
2155: print $client "error: ".($!+0)
2156: ." untie(GDBM) Failed ".
2157: "while attempting rolesput\n";
2158: }
2159: } else {
2160: print $client "error: ".($!+0)
2161: ." tie(GDBM) Failed ".
2162: "while attempting rolesput\n";
2163: }
2164: } else {
2165: print $client "refused\n";
2166: }
2167: } else {
2168: Reply($client, "refused\n", $userinput);
2169:
2170: }
2171: # -------------------------------------------------------------------- rolesdel
2172: } elsif ($userinput =~ /^rolesdel/) {
2173: if(isClient) {
2174: &Debug("rolesdel");
2175: if ($wasenc==1) {
2176: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
2177: =split(/:/,$userinput);
2178: &Debug("cmd = ".$cmd." exedom= ".$exedom.
2179: "user = ".$exeuser." udom=".$udom.
2180: "what = ".$what);
2181: my $namespace='roles';
2182: chomp($what);
2183: my $proname=propath($udom,$uname);
2184: my $now=time;
2185: my @rolekeys=split(/\&/,$what);
2186: my %hash;
2187: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2188: {
2189: my $hfh;
2190: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) {
2191: print $hfh "D:$now:$exedom:$exeuser:$what\n";
2192: }
2193: }
2194: foreach my $key (@rolekeys) {
2195: delete $hash{$key};
2196: }
2197: if (untie(%hash)) {
2198: print $client "ok\n";
2199: } else {
2200: print $client "error: ".($!+0)
2201: ." untie(GDBM) Failed ".
2202: "while attempting rolesdel\n";
2203: }
2204: } else {
2205: print $client "error: ".($!+0)
2206: ." tie(GDBM) Failed ".
2207: "while attempting rolesdel\n";
2208: }
2209: } else {
2210: print $client "refused\n";
2211: }
2212: } else {
2213: Reply($client, "refused\n", $userinput);
2214:
2215: }
2216: # ------------------------------------------------------------------------- get
2217: } elsif ($userinput =~ /^get/) {
2218: if(isClient) {
2219: my ($cmd,$udom,$uname,$namespace,$what)
2220: =split(/:/,$userinput);
2221: $namespace=~s/\//\_/g;
2222: $namespace=~s/\W//g;
2223: chomp($what);
2224: my @queries=split(/\&/,$what);
2225: my $proname=propath($udom,$uname);
2226: my $qresult='';
2227: my %hash;
2228: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2229: for (my $i=0;$i<=$#queries;$i++) {
2230: $qresult.="$hash{$queries[$i]}&";
2231: }
2232: if (untie(%hash)) {
2233: $qresult=~s/\&$//;
2234: print $client "$qresult\n";
2235: } else {
2236: print $client "error: ".($!+0)
2237: ." untie(GDBM) Failed ".
2238: "while attempting get\n";
2239: }
2240: } else {
2241: if ($!+0 == 2) {
2242: print $client "error:No such file or ".
2243: "GDBM reported bad block error\n";
2244: } else {
2245: print $client "error: ".($!+0)
2246: ." tie(GDBM) Failed ".
2247: "while attempting get\n";
2248: }
2249: }
2250: } else {
2251: Reply($client, "refused\n", $userinput);
2252:
2253: }
2254: # ------------------------------------------------------------------------ eget
2255: } elsif ($userinput =~ /^eget/) {
2256: if (isClient) {
2257: my ($cmd,$udom,$uname,$namespace,$what)
2258: =split(/:/,$userinput);
2259: $namespace=~s/\//\_/g;
2260: $namespace=~s/\W//g;
2261: chomp($what);
2262: my @queries=split(/\&/,$what);
2263: my $proname=propath($udom,$uname);
2264: my $qresult='';
2265: my %hash;
2266: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2267: for (my $i=0;$i<=$#queries;$i++) {
2268: $qresult.="$hash{$queries[$i]}&";
2269: }
2270: if (untie(%hash)) {
2271: $qresult=~s/\&$//;
2272: if ($cipher) {
2273: my $cmdlength=length($qresult);
2274: $qresult.=" ";
2275: my $encqresult='';
2276: for
2277: (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
2278: $encqresult.=
2279: unpack("H16",
2280: $cipher->encrypt(substr($qresult,$encidx,8)));
2281: }
2282: print $client "enc:$cmdlength:$encqresult\n";
2283: } else {
2284: print $client "error:no_key\n";
2285: }
2286: } else {
2287: print $client "error: ".($!+0)
2288: ." untie(GDBM) Failed ".
2289: "while attempting eget\n";
2290: }
2291: } else {
2292: print $client "error: ".($!+0)
2293: ." tie(GDBM) Failed ".
2294: "while attempting eget\n";
2295: }
2296: } else {
2297: Reply($client, "refused\n", $userinput);
2298:
2299: }
2300: # ------------------------------------------------------------------------- del
2301: } elsif ($userinput =~ /^del/) {
2302: if(isClient) {
2303: my ($cmd,$udom,$uname,$namespace,$what)
2304: =split(/:/,$userinput);
2305: $namespace=~s/\//\_/g;
2306: $namespace=~s/\W//g;
2307: chomp($what);
2308: my $proname=propath($udom,$uname);
2309: my $now=time;
2310: my @keys=split(/\&/,$what);
2311: my %hash;
2312: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2313: unless ($namespace=~/^nohist\_/) {
2314: my $hfh;
2315: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) { print $hfh "D:$now:$what\n"; }
2316: }
2317: foreach my $key (@keys) {
2318: delete($hash{$key});
2319: }
2320: if (untie(%hash)) {
2321: print $client "ok\n";
2322: } else {
2323: print $client "error: ".($!+0)
2324: ." untie(GDBM) Failed ".
2325: "while attempting del\n";
2326: }
2327: } else {
2328: print $client "error: ".($!+0)
2329: ." tie(GDBM) Failed ".
2330: "while attempting del\n";
2331: }
2332: } else {
2333: Reply($client, "refused\n", $userinput);
2334:
2335: }
2336: # ------------------------------------------------------------------------ keys
2337: } elsif ($userinput =~ /^keys/) {
2338: if(isClient) {
2339: my ($cmd,$udom,$uname,$namespace)
2340: =split(/:/,$userinput);
2341: $namespace=~s/\//\_/g;
2342: $namespace=~s/\W//g;
2343: my $proname=propath($udom,$uname);
2344: my $qresult='';
2345: my %hash;
2346: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2347: foreach my $key (keys %hash) {
2348: $qresult.="$key&";
2349: }
2350: if (untie(%hash)) {
2351: $qresult=~s/\&$//;
2352: print $client "$qresult\n";
2353: } else {
2354: print $client "error: ".($!+0)
2355: ." untie(GDBM) Failed ".
2356: "while attempting keys\n";
2357: }
2358: } else {
2359: print $client "error: ".($!+0)
2360: ." tie(GDBM) Failed ".
2361: "while attempting keys\n";
2362: }
2363: } else {
2364: Reply($client, "refused\n", $userinput);
2365:
2366: }
2367: # ----------------------------------------------------------------- dumpcurrent
2368: } elsif ($userinput =~ /^currentdump/) {
2369: if (isClient) {
2370: my ($cmd,$udom,$uname,$namespace)
2371: =split(/:/,$userinput);
2372: $namespace=~s/\//\_/g;
2373: $namespace=~s/\W//g;
2374: my $qresult='';
2375: my $proname=propath($udom,$uname);
2376: my %hash;
2377: if (tie(%hash,'GDBM_File',
2378: "$proname/$namespace.db",
2379: &GDBM_READER(),0640)) {
2380: # Structure of %data:
2381: # $data{$symb}->{$parameter}=$value;
2382: # $data{$symb}->{'v.'.$parameter}=$version;
2383: # since $parameter will be unescaped, we do not
2384: # have to worry about silly parameter names...
2385: my %data = ();
2386: while (my ($key,$value) = each(%hash)) {
2387: my ($v,$symb,$param) = split(/:/,$key);
2388: next if ($v eq 'version' || $symb eq 'keys');
2389: next if (exists($data{$symb}) &&
2390: exists($data{$symb}->{$param}) &&
2391: $data{$symb}->{'v.'.$param} > $v);
2392: $data{$symb}->{$param}=$value;
2393: $data{$symb}->{'v.'.$param}=$v;
2394: }
2395: if (untie(%hash)) {
2396: while (my ($symb,$param_hash) = each(%data)) {
2397: while(my ($param,$value) = each (%$param_hash)){
2398: next if ($param =~ /^v\./);
2399: $qresult.=$symb.':'.$param.'='.$value.'&';
2400: }
2401: }
2402: chop($qresult);
2403: print $client "$qresult\n";
2404: } else {
2405: print $client "error: ".($!+0)
2406: ." untie(GDBM) Failed ".
2407: "while attempting currentdump\n";
2408: }
2409: } else {
2410: print $client "error: ".($!+0)
2411: ." tie(GDBM) Failed ".
2412: "while attempting currentdump\n";
2413: }
2414: } else {
2415: Reply($client, "refused\n", $userinput);
2416: }
2417: # ------------------------------------------------------------------------ dump
2418: } elsif ($userinput =~ /^dump/) {
2419: if(isClient) {
2420: my ($cmd,$udom,$uname,$namespace,$regexp)
2421: =split(/:/,$userinput);
2422: $namespace=~s/\//\_/g;
2423: $namespace=~s/\W//g;
2424: if (defined($regexp)) {
2425: $regexp=&unescape($regexp);
2426: } else {
2427: $regexp='.';
2428: }
2429: my $qresult='';
2430: my $proname=propath($udom,$uname);
2431: my %hash;
2432: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2433: while (my ($key,$value) = each(%hash)) {
2434: if ($regexp eq '.') {
2435: $qresult.=$key.'='.$value.'&';
2436: } else {
2437: my $unescapeKey = &unescape($key);
2438: if (eval('$unescapeKey=~/$regexp/')) {
2439: $qresult.="$key=$value&";
2440: }
2441: }
2442: }
2443: if (untie(%hash)) {
2444: chop($qresult);
2445: print $client "$qresult\n";
2446: } else {
2447: print $client "error: ".($!+0)
2448: ." untie(GDBM) Failed ".
2449: "while attempting dump\n";
2450: }
2451: } else {
2452: print $client "error: ".($!+0)
2453: ." tie(GDBM) Failed ".
2454: "while attempting dump\n";
2455: }
2456: } else {
2457: Reply($client, "refused\n", $userinput);
2458:
2459: }
2460: # ----------------------------------------------------------------------- store
2461: } elsif ($userinput =~ /^store/) {
2462: if(isClient) {
2463: my ($cmd,$udom,$uname,$namespace,$rid,$what)
2464: =split(/:/,$userinput);
2465: $namespace=~s/\//\_/g;
2466: $namespace=~s/\W//g;
2467: if ($namespace ne 'roles') {
2468: chomp($what);
2469: my $proname=propath($udom,$uname);
2470: my $now=time;
2471: my @pairs=split(/\&/,$what);
2472: my %hash;
2473: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2474: unless ($namespace=~/^nohist\_/) {
2475: my $hfh;
2476: if ($hfh=IO::File->new(">>$proname/$namespace.hist")) {
2477: print $hfh "P:$now:$rid:$what\n";
2478: }
2479: }
2480: my @previouskeys=split(/&/,$hash{"keys:$rid"});
2481: my $key;
2482: $hash{"version:$rid"}++;
2483: my $version=$hash{"version:$rid"};
2484: my $allkeys='';
2485: foreach my $pair (@pairs) {
2486: my ($key,$value)=split(/=/,$pair);
2487: $allkeys.=$key.':';
2488: $hash{"$version:$rid:$key"}=$value;
2489: }
2490: $hash{"$version:$rid:timestamp"}=$now;
2491: $allkeys.='timestamp';
2492: $hash{"$version:keys:$rid"}=$allkeys;
2493: if (untie(%hash)) {
2494: print $client "ok\n";
2495: } else {
2496: print $client "error: ".($!+0)
2497: ." untie(GDBM) Failed ".
2498: "while attempting store\n";
2499: }
2500: } else {
2501: print $client "error: ".($!+0)
2502: ." tie(GDBM) Failed ".
2503: "while attempting store\n";
2504: }
2505: } else {
2506: print $client "refused\n";
2507: }
2508: } else {
2509: Reply($client, "refused\n", $userinput);
2510:
2511: }
2512: # --------------------------------------------------------------------- restore
2513: } elsif ($userinput =~ /^restore/) {
2514: if(isClient) {
2515: my ($cmd,$udom,$uname,$namespace,$rid)
2516: =split(/:/,$userinput);
2517: $namespace=~s/\//\_/g;
2518: $namespace=~s/\W//g;
2519: chomp($rid);
2520: my $proname=propath($udom,$uname);
2521: my $qresult='';
2522: my %hash;
2523: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2524: my $version=$hash{"version:$rid"};
2525: $qresult.="version=$version&";
2526: my $scope;
2527: for ($scope=1;$scope<=$version;$scope++) {
2528: my $vkeys=$hash{"$scope:keys:$rid"};
2529: my @keys=split(/:/,$vkeys);
2530: my $key;
2531: $qresult.="$scope:keys=$vkeys&";
2532: foreach $key (@keys) {
2533: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
2534: }
2535: }
2536: if (untie(%hash)) {
2537: $qresult=~s/\&$//;
2538: print $client "$qresult\n";
2539: } else {
2540: print $client "error: ".($!+0)
2541: ." untie(GDBM) Failed ".
2542: "while attempting restore\n";
2543: }
2544: } else {
2545: print $client "error: ".($!+0)
2546: ." tie(GDBM) Failed ".
2547: "while attempting restore\n";
2548: }
2549: } else {
2550: Reply($client, "refused\n", $userinput);
2551:
2552: }
2553: # -------------------------------------------------------------------- chatsend
2554: } elsif ($userinput =~ /^chatsend/) {
2555: if(isClient) {
2556: my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
2557: &chatadd($cdom,$cnum,$newpost);
2558: print $client "ok\n";
2559: } else {
2560: Reply($client, "refused\n", $userinput);
2561:
2562: }
2563: # -------------------------------------------------------------------- chatretr
2564: } elsif ($userinput =~ /^chatretr/) {
2565: if(isClient) {
2566: my
2567: ($cmd,$cdom,$cnum,$udom,$uname)=split(/\:/,$userinput);
2568: my $reply='';
2569: foreach (&getchat($cdom,$cnum,$udom,$uname)) {
2570: $reply.=&escape($_).':';
2571: }
2572: $reply=~s/\:$//;
2573: print $client $reply."\n";
2574: } else {
2575: Reply($client, "refused\n", $userinput);
2576:
2577: }
2578: # ------------------------------------------------------------------- querysend
2579: } elsif ($userinput =~ /^querysend/) {
2580: if (isClient) {
2581: my ($cmd,$query,
2582: $arg1,$arg2,$arg3)=split(/\:/,$userinput);
2583: $query=~s/\n*$//g;
2584: print $client "".
2585: sqlreply("$clientname\&$query".
2586: "\&$arg1"."\&$arg2"."\&$arg3")."\n";
2587: } else {
2588: Reply($client, "refused\n", $userinput);
2589:
2590: }
2591: # ------------------------------------------------------------------ queryreply
2592: } elsif ($userinput =~ /^queryreply/) {
2593: if(isClient) {
2594: my ($cmd,$id,$reply)=split(/:/,$userinput);
2595: my $store;
2596: my $execdir=$perlvar{'lonDaemons'};
2597: if ($store=IO::File->new(">$execdir/tmp/$id")) {
2598: $reply=~s/\&/\n/g;
2599: print $store $reply;
2600: close $store;
2601: my $store2=IO::File->new(">$execdir/tmp/$id.end");
2602: print $store2 "done\n";
2603: close $store2;
2604: print $client "ok\n";
1.224 foxr 2605: } else {
1.212 foxr 2606: print $client "error: ".($!+0)
2607: ." IO::File->new Failed ".
2608: "while attempting queryreply\n";
2609: }
2610: } else {
2611: Reply($client, "refused\n", $userinput);
2612:
2613: }
2614: # ----------------------------------------------------------------- courseidput
2615: } elsif ($userinput =~ /^courseidput/) {
2616: if(isClient) {
2617: my ($cmd,$udom,$what)=split(/:/,$userinput);
2618: chomp($what);
2619: $udom=~s/\W//g;
2620: my $proname=
2621: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
2622: my $now=time;
2623: my @pairs=split(/\&/,$what);
2624: my %hash;
2625: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
2626: foreach my $pair (@pairs) {
2627: my ($key,$descr,$inst_code)=split(/=/,$pair);
2628: $hash{$key}=$descr.':'.$inst_code.':'.$now;
2629: }
2630: if (untie(%hash)) {
2631: print $client "ok\n";
2632: } else {
2633: print $client "error: ".($!+0)
2634: ." untie(GDBM) Failed ".
2635: "while attempting courseidput\n";
2636: }
2637: } else {
2638: print $client "error: ".($!+0)
2639: ." tie(GDBM) Failed ".
2640: "while attempting courseidput\n";
2641: }
2642: } else {
2643: Reply($client, "refused\n", $userinput);
2644:
2645: }
2646: # ---------------------------------------------------------------- courseiddump
2647: } elsif ($userinput =~ /^courseiddump/) {
2648: if(isClient) {
2649: my ($cmd,$udom,$since,$description)
2650: =split(/:/,$userinput);
2651: if (defined($description)) {
2652: $description=&unescape($description);
2653: } else {
2654: $description='.';
2655: }
2656: unless (defined($since)) { $since=0; }
2657: my $qresult='';
2658: my $proname=
2659: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
2660: my %hash;
2661: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
2662: while (my ($key,$value) = each(%hash)) {
2663: my ($descr,$lasttime,$inst_code);
2664: if ($value =~ m/^([^\:]*):([^\:]*):(\d+)$/) {
2665: ($descr,$inst_code,$lasttime)=($1,$2,$3);
2666: } else {
2667: ($descr,$lasttime) = split(/\:/,$value);
2668: }
2669: if ($lasttime<$since) { next; }
2670: if ($description eq '.') {
2671: $qresult.=$key.'='.$descr.':'.$inst_code.'&';
2672: } else {
2673: my $unescapeVal = &unescape($descr);
2674: if (eval('$unescapeVal=~/\Q$description\E/i')) {
2675: $qresult.=$key.'='.$descr.':'.$inst_code.'&';
2676: }
2677: }
2678: }
2679: if (untie(%hash)) {
2680: chop($qresult);
2681: print $client "$qresult\n";
2682: } else {
2683: print $client "error: ".($!+0)
2684: ." untie(GDBM) Failed ".
2685: "while attempting courseiddump\n";
2686: }
2687: } else {
2688: print $client "error: ".($!+0)
2689: ." tie(GDBM) Failed ".
2690: "while attempting courseiddump\n";
2691: }
2692: } else {
2693: Reply($client, "refused\n", $userinput);
2694:
2695: }
2696: # ----------------------------------------------------------------------- idput
2697: } elsif ($userinput =~ /^idput/) {
2698: if(isClient) {
2699: my ($cmd,$udom,$what)=split(/:/,$userinput);
2700: chomp($what);
2701: $udom=~s/\W//g;
2702: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
2703: my $now=time;
2704: my @pairs=split(/\&/,$what);
2705: my %hash;
2706: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
2707: {
2708: my $hfh;
2709: if ($hfh=IO::File->new(">>$proname.hist")) {
2710: print $hfh "P:$now:$what\n";
2711: }
2712: }
2713: foreach my $pair (@pairs) {
2714: my ($key,$value)=split(/=/,$pair);
2715: $hash{$key}=$value;
2716: }
2717: if (untie(%hash)) {
2718: print $client "ok\n";
2719: } else {
2720: print $client "error: ".($!+0)
2721: ." untie(GDBM) Failed ".
2722: "while attempting idput\n";
2723: }
2724: } else {
2725: print $client "error: ".($!+0)
2726: ." tie(GDBM) Failed ".
2727: "while attempting idput\n";
2728: }
2729: } else {
2730: Reply($client, "refused\n", $userinput);
2731:
2732: }
2733: # ----------------------------------------------------------------------- idget
2734: } elsif ($userinput =~ /^idget/) {
2735: if(isClient) {
2736: my ($cmd,$udom,$what)=split(/:/,$userinput);
2737: chomp($what);
2738: $udom=~s/\W//g;
2739: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
2740: my @queries=split(/\&/,$what);
2741: my $qresult='';
2742: my %hash;
2743: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
2744: for (my $i=0;$i<=$#queries;$i++) {
2745: $qresult.="$hash{$queries[$i]}&";
2746: }
2747: if (untie(%hash)) {
2748: $qresult=~s/\&$//;
2749: print $client "$qresult\n";
2750: } else {
2751: print $client "error: ".($!+0)
2752: ." untie(GDBM) Failed ".
2753: "while attempting idget\n";
2754: }
2755: } else {
2756: print $client "error: ".($!+0)
2757: ." tie(GDBM) Failed ".
2758: "while attempting idget\n";
2759: }
2760: } else {
2761: Reply($client, "refused\n", $userinput);
2762:
2763: }
2764: # ---------------------------------------------------------------------- tmpput
2765: } elsif ($userinput =~ /^tmpput/) {
2766: if(isClient) {
2767: my ($cmd,$what)=split(/:/,$userinput);
2768: my $store;
2769: $tmpsnum++;
2770: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
2771: $id=~s/\W/\_/g;
2772: $what=~s/\n//g;
2773: my $execdir=$perlvar{'lonDaemons'};
2774: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
2775: print $store $what;
2776: close $store;
2777: print $client "$id\n";
2778: }
2779: else {
2780: print $client "error: ".($!+0)
2781: ."IO::File->new Failed ".
2782: "while attempting tmpput\n";
2783: }
2784: } else {
2785: Reply($client, "refused\n", $userinput);
2786:
2787: }
2788:
2789: # ---------------------------------------------------------------------- tmpget
2790: } elsif ($userinput =~ /^tmpget/) {
2791: if(isClient) {
2792: my ($cmd,$id)=split(/:/,$userinput);
2793: chomp($id);
2794: $id=~s/\W/\_/g;
2795: my $store;
2796: my $execdir=$perlvar{'lonDaemons'};
2797: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
2798: my $reply=<$store>;
2799: print $client "$reply\n";
2800: close $store;
2801: }
2802: else {
2803: print $client "error: ".($!+0)
2804: ."IO::File->new Failed ".
2805: "while attempting tmpget\n";
2806: }
2807: } else {
2808: Reply($client, "refused\n", $userinput);
2809:
2810: }
2811: # ---------------------------------------------------------------------- tmpdel
2812: } elsif ($userinput =~ /^tmpdel/) {
2813: if(isClient) {
2814: my ($cmd,$id)=split(/:/,$userinput);
2815: chomp($id);
2816: $id=~s/\W/\_/g;
2817: my $execdir=$perlvar{'lonDaemons'};
2818: if (unlink("$execdir/tmp/$id.tmp")) {
2819: print $client "ok\n";
2820: } else {
2821: print $client "error: ".($!+0)
2822: ."Unlink tmp Failed ".
2823: "while attempting tmpdel\n";
2824: }
2825: } else {
2826: Reply($client, "refused\n", $userinput);
2827:
2828: }
2829: # ----------------------------------------- portfolio directory list (portls)
2830: } elsif ($userinput =~ /^portls/) {
2831: if(isClient) {
2832: my ($cmd,$uname,$udom)=split(/:/,$userinput);
2833: my $udir=propath($udom,$uname).'/userfiles/portfolio';
2834: my $dirLine='';
2835: my $dirContents='';
2836: if (opendir(LSDIR,$udir.'/')){
2837: while ($dirLine = readdir(LSDIR)){
2838: $dirContents = $dirContents.$dirLine.'<br />';
2839: }
2840: } else {
2841: $dirContents = "No directory found\n";
2842: }
2843: print $client $dirContents."\n";
2844: } else {
2845: Reply($client, "refused\n", $userinput);
2846: }
2847: # -------------------------------------------------------------------------- ls
2848: } elsif ($userinput =~ /^ls/) {
2849: if(isClient) {
2850: my $obs;
2851: my $rights;
2852: my ($cmd,$ulsdir)=split(/:/,$userinput);
2853: my $ulsout='';
2854: my $ulsfn;
2855: if (-e $ulsdir) {
2856: if(-d $ulsdir) {
2857: if (opendir(LSDIR,$ulsdir)) {
2858: while ($ulsfn=readdir(LSDIR)) {
2859: undef $obs, $rights;
2860: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
2861: #We do some obsolete checking here
2862: if(-e $ulsdir.'/'.$ulsfn.".meta") {
2863: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
2864: my @obsolete=<FILE>;
2865: foreach my $obsolete (@obsolete) {
2866: if($obsolete =~ m|(<obsolete>)(on)|) { $obs = 1; }
2867: if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
2868: }
2869: }
2870: $ulsout.=$ulsfn.'&'.join('&',@ulsstats);
2871: if($obs eq '1') { $ulsout.="&1"; }
2872: else { $ulsout.="&0"; }
2873: if($rights eq '1') { $ulsout.="&1:"; }
2874: else { $ulsout.="&0:"; }
2875: }
2876: closedir(LSDIR);
2877: }
2878: } else {
2879: my @ulsstats=stat($ulsdir);
2880: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
2881: }
2882: } else {
2883: $ulsout='no_such_dir';
2884: }
2885: if ($ulsout eq '') { $ulsout='empty'; }
2886: print $client "$ulsout\n";
2887: } else {
2888: Reply($client, "refused\n", $userinput);
2889:
2890: }
2891: # ----------------------------------------------------------------- setannounce
2892: } elsif ($userinput =~ /^setannounce/) {
2893: if (isClient) {
2894: my ($cmd,$announcement)=split(/:/,$userinput);
2895: chomp($announcement);
2896: $announcement=&unescape($announcement);
2897: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
2898: '/announcement.txt')) {
2899: print $store $announcement;
2900: close $store;
2901: print $client "ok\n";
2902: } else {
2903: print $client "error: ".($!+0)."\n";
2904: }
2905: } else {
2906: Reply($client, "refused\n", $userinput);
2907:
2908: }
2909: # ------------------------------------------------------------------ Hanging up
2910: } elsif (($userinput =~ /^exit/) ||
2911: ($userinput =~ /^init/)) { # no restrictions.
2912: &logthis(
2913: "Client $clientip ($clientname) hanging up: $userinput");
2914: print $client "bye\n";
2915: $client->shutdown(2); # shutdown the socket forcibly.
2916: $client->close();
2917: return 0;
2918:
2919: # ---------------------------------- set current host/domain
2920: } elsif ($userinput =~ /^sethost:/) {
2921: if (isClient) {
2922: print $client &sethost($userinput)."\n";
2923: } else {
2924: print $client "refused\n";
2925: }
2926: #---------------------------------- request file (?) version.
2927: } elsif ($userinput =~/^version:/) {
2928: if (isClient) {
2929: print $client &version($userinput)."\n";
2930: } else {
2931: print $client "refused\n";
2932: }
2933: #------------------------------- is auto-enrollment enabled?
2934: } elsif ($userinput =~/^autorun:/) {
2935: if (isClient) {
2936: my ($cmd,$cdom) = split(/:/,$userinput);
2937: my $outcome = &localenroll::run($cdom);
2938: print $client "$outcome\n";
2939: } else {
2940: print $client "0\n";
2941: }
2942: #------------------------------- get official sections (for auto-enrollment).
2943: } elsif ($userinput =~/^autogetsections:/) {
2944: if (isClient) {
2945: my ($cmd,$coursecode,$cdom)=split(/:/,$userinput);
2946: my @secs = &localenroll::get_sections($coursecode,$cdom);
2947: my $seclist = &escape(join(':',@secs));
2948: print $client "$seclist\n";
2949: } else {
2950: print $client "refused\n";
2951: }
2952: #----------------------- validate owner of new course section (for auto-enrollment).
2953: } elsif ($userinput =~/^autonewcourse:/) {
2954: if (isClient) {
2955: my ($cmd,$inst_course_id,$owner,$cdom)=split(/:/,$userinput);
2956: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom);
2957: print $client "$outcome\n";
2958: } else {
2959: print $client "refused\n";
2960: }
2961: #-------------- validate course section in schedule of classes (for auto-enrollment).
2962: } elsif ($userinput =~/^autovalidatecourse:/) {
2963: if (isClient) {
2964: my ($cmd,$inst_course_id,$cdom)=split(/:/,$userinput);
2965: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
2966: print $client "$outcome\n";
2967: } else {
2968: print $client "refused\n";
2969: }
2970: #--------------------------- create password for new user (for auto-enrollment).
2971: } elsif ($userinput =~/^autocreatepassword:/) {
2972: if (isClient) {
2973: my ($cmd,$authparam,$cdom)=split(/:/,$userinput);
2974: my ($create_passwd,$authchk);
2975: ($authparam,$create_passwd,$authchk) = &localenroll::create_password($authparam,$cdom);
2976: print $client &escape($authparam.':'.$create_passwd.':'.$authchk)."\n";
2977: } else {
2978: print $client "refused\n";
2979: }
2980: #--------------------------- read and remove temporary files (for auto-enrollment).
2981: } elsif ($userinput =~/^autoretrieve:/) {
2982: if (isClient) {
2983: my ($cmd,$filename) = split(/:/,$userinput);
2984: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
2985: if ( (-e $source) && ($filename ne '') ) {
2986: my $reply = '';
2987: if (open(my $fh,$source)) {
2988: while (<$fh>) {
2989: chomp($_);
2990: $_ =~ s/^\s+//g;
2991: $_ =~ s/\s+$//g;
2992: $reply .= $_;
2993: }
2994: close($fh);
2995: print $client &escape($reply)."\n";
2996: # unlink($source);
2997: } else {
2998: print $client "error\n";
2999: }
3000: } else {
3001: print $client "error\n";
3002: }
3003: } else {
3004: print $client "refused\n";
3005: }
3006: #--------------------- read and retrieve institutional code format (for support form).
3007: } elsif ($userinput =~/^autoinstcodeformat:/) {
3008: if (isClient) {
3009: my $reply;
3010: my($cmd,$cdom,$course) = split(/:/,$userinput);
3011: my @pairs = split/\&/,$course;
3012: my %instcodes = ();
3013: my %codes = ();
3014: my @codetitles = ();
3015: my %cat_titles = ();
3016: my %cat_order = ();
3017: foreach (@pairs) {
3018: my ($key,$value) = split/=/,$_;
3019: $instcodes{&unescape($key)} = &unescape($value);
3020: }
3021: my $formatreply = &localenroll::instcode_format($cdom,\%instcodes,\%codes,\@codetitles,\%cat_titles,\%cat_order);
3022: if ($formatreply eq 'ok') {
3023: my $codes_str = &hash2str(%codes);
3024: my $codetitles_str = &array2str(@codetitles);
3025: my $cat_titles_str = &hash2str(%cat_titles);
3026: my $cat_order_str = &hash2str(%cat_order);
3027: print $client $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'.$cat_order_str."\n";
3028: }
3029: } else {
3030: print $client "refused\n";
3031: }
3032: # ------------------------------------------------------------- unknown command
3033:
3034: } else {
3035: # unknown command
3036: print $client "unknown_cmd\n";
3037: }
3038: # -------------------------------------------------------------------- complete
3039: Debug("process_request - returning 1");
3040: return 1;
3041: }
1.207 foxr 3042: #
3043: # Decipher encoded traffic
3044: # Parameters:
3045: # input - Encoded data.
3046: # Returns:
3047: # Decoded data or undef if encryption key was not yet negotiated.
3048: # Implicit input:
3049: # cipher - This global holds the negotiated encryption key.
3050: #
1.211 albertel 3051: sub decipher {
1.207 foxr 3052: my ($input) = @_;
3053: my $output = '';
1.212 foxr 3054:
3055:
1.207 foxr 3056: if($cipher) {
3057: my($enc, $enclength, $encinput) = split(/:/, $input);
3058: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
3059: $output .=
3060: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
3061: }
3062: return substr($output, 0, $enclength);
3063: } else {
3064: return undef;
3065: }
3066: }
3067:
3068: #
3069: # Register a command processor. This function is invoked to register a sub
3070: # to process a request. Once registered, the ProcessRequest sub can automatically
3071: # dispatch requests to an appropriate sub, and do the top level validity checking
3072: # as well:
3073: # - Is the keyword recognized.
3074: # - Is the proper client type attempting the request.
3075: # - Is the request encrypted if it has to be.
3076: # Parameters:
3077: # $request_name - Name of the request being registered.
3078: # This is the command request that will match
3079: # against the hash keywords to lookup the information
3080: # associated with the dispatch information.
3081: # $procedure - Reference to a sub to call to process the request.
3082: # All subs get called as follows:
3083: # Procedure($cmd, $tail, $replyfd, $key)
3084: # $cmd - the actual keyword that invoked us.
3085: # $tail - the tail of the request that invoked us.
3086: # $replyfd- File descriptor connected to the client
3087: # $must_encode - True if the request must be encoded to be good.
3088: # $client_ok - True if it's ok for a client to request this.
3089: # $manager_ok - True if it's ok for a manager to request this.
3090: # Side effects:
3091: # - On success, the Dispatcher hash has an entry added for the key $RequestName
3092: # - On failure, the program will die as it's a bad internal bug to try to
3093: # register a duplicate command handler.
3094: #
1.211 albertel 3095: sub register_handler {
1.212 foxr 3096: my ($request_name,$procedure,$must_encode, $client_ok,$manager_ok) = @_;
1.207 foxr 3097:
3098: # Don't allow duplication#
3099:
3100: if (defined $Dispatcher{$request_name}) {
3101: die "Attempting to define a duplicate request handler for $request_name\n";
3102: }
3103: # Build the client type mask:
3104:
3105: my $client_type_mask = 0;
3106: if($client_ok) {
3107: $client_type_mask |= $CLIENT_OK;
3108: }
3109: if($manager_ok) {
3110: $client_type_mask |= $MANAGER_OK;
3111: }
3112:
3113: # Enter the hash:
3114:
3115: my @entry = ($procedure, $must_encode, $client_type_mask);
3116:
3117: $Dispatcher{$request_name} = \@entry;
3118:
3119: }
3120:
3121:
3122: #------------------------------------------------------------------
3123:
3124:
3125:
3126:
1.141 foxr 3127: #
1.96 foxr 3128: # Convert an error return code from lcpasswd to a string value.
3129: #
3130: sub lcpasswdstrerror {
3131: my $ErrorCode = shift;
1.97 foxr 3132: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
1.96 foxr 3133: return "lcpasswd Unrecognized error return value ".$ErrorCode;
3134: } else {
1.98 foxr 3135: return $passwderrors[$ErrorCode];
1.96 foxr 3136: }
3137: }
3138:
1.97 foxr 3139: #
3140: # Convert an error return code from lcuseradd to a string value:
3141: #
3142: sub lcuseraddstrerror {
3143: my $ErrorCode = shift;
3144: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
3145: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
3146: } else {
1.98 foxr 3147: return $adderrors[$ErrorCode];
1.97 foxr 3148: }
3149: }
3150:
1.23 harris41 3151: # grabs exception and records it to log before exiting
3152: sub catchexception {
1.27 albertel 3153: my ($error)=@_;
1.25 www 3154: $SIG{'QUIT'}='DEFAULT';
3155: $SIG{__DIE__}='DEFAULT';
1.165 albertel 3156: &status("Catching exception");
1.190 albertel 3157: &logthis("<font color='red'>CRITICAL: "
1.134 albertel 3158: ."ABNORMAL EXIT. Child $$ for server $thisserver died through "
1.27 albertel 3159: ."a crash with this error msg->[$error]</font>");
1.57 www 3160: &logthis('Famous last words: '.$status.' - '.$lastlog);
1.27 albertel 3161: if ($client) { print $client "error: $error\n"; }
1.59 www 3162: $server->close();
1.27 albertel 3163: die($error);
1.23 harris41 3164: }
1.63 www 3165: sub timeout {
1.165 albertel 3166: &status("Handling Timeout");
1.190 albertel 3167: &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
1.63 www 3168: &catchexception('Timeout');
3169: }
1.22 harris41 3170: # -------------------------------- Set signal handlers to record abnormal exits
3171:
1.226 ! foxr 3172:
1.22 harris41 3173: $SIG{'QUIT'}=\&catchexception;
3174: $SIG{__DIE__}=\&catchexception;
3175:
1.81 matthew 3176: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
1.95 harris41 3177: &status("Read loncapa.conf and loncapa_apache.conf");
3178: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
1.141 foxr 3179: %perlvar=%{$perlvarref};
1.80 harris41 3180: undef $perlvarref;
1.19 www 3181:
1.35 harris41 3182: # ----------------------------- Make sure this process is running from user=www
3183: my $wwwid=getpwnam('www');
3184: if ($wwwid!=$<) {
1.134 albertel 3185: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
3186: my $subj="LON: $currenthostid User ID mismatch";
1.37 harris41 3187: system("echo 'User ID mismatch. lond must be run as user www.' |\
1.35 harris41 3188: mailto $emailto -s '$subj' > /dev/null");
3189: exit 1;
3190: }
3191:
1.19 www 3192: # --------------------------------------------- Check if other instance running
3193:
3194: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
3195:
3196: if (-e $pidfile) {
3197: my $lfh=IO::File->new("$pidfile");
3198: my $pide=<$lfh>;
3199: chomp($pide);
1.29 harris41 3200: if (kill 0 => $pide) { die "already running"; }
1.19 www 3201: }
1.1 albertel 3202:
3203: # ------------------------------------------------------------- Read hosts file
3204:
3205:
3206:
3207: # establish SERVER socket, bind and listen.
3208: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
3209: Type => SOCK_STREAM,
3210: Proto => 'tcp',
3211: Reuse => 1,
3212: Listen => 10 )
1.29 harris41 3213: or die "making socket: $@\n";
1.1 albertel 3214:
3215: # --------------------------------------------------------- Do global variables
3216:
3217: # global variables
3218:
1.134 albertel 3219: my %children = (); # keys are current child process IDs
1.1 albertel 3220:
3221: sub REAPER { # takes care of dead children
3222: $SIG{CHLD} = \&REAPER;
1.165 albertel 3223: &status("Handling child death");
1.178 foxr 3224: my $pid;
3225: do {
3226: $pid = waitpid(-1,&WNOHANG());
3227: if (defined($children{$pid})) {
3228: &logthis("Child $pid died");
3229: delete($children{$pid});
1.183 albertel 3230: } elsif ($pid > 0) {
1.178 foxr 3231: &logthis("Unknown Child $pid died");
3232: }
3233: } while ( $pid > 0 );
3234: foreach my $child (keys(%children)) {
3235: $pid = waitpid($child,&WNOHANG());
3236: if ($pid > 0) {
3237: &logthis("Child $child - $pid looks like we missed it's death");
3238: delete($children{$pid});
3239: }
1.176 albertel 3240: }
1.165 albertel 3241: &status("Finished Handling child death");
1.1 albertel 3242: }
3243:
3244: sub HUNTSMAN { # signal handler for SIGINT
1.165 albertel 3245: &status("Killing children (INT)");
1.1 albertel 3246: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
3247: kill 'INT' => keys %children;
1.59 www 3248: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.1 albertel 3249: my $execdir=$perlvar{'lonDaemons'};
3250: unlink("$execdir/logs/lond.pid");
1.190 albertel 3251: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
1.165 albertel 3252: &status("Done killing children");
1.1 albertel 3253: exit; # clean up with dignity
3254: }
3255:
3256: sub HUPSMAN { # signal handler for SIGHUP
3257: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
1.165 albertel 3258: &status("Killing children for restart (HUP)");
1.1 albertel 3259: kill 'INT' => keys %children;
1.59 www 3260: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.190 albertel 3261: &logthis("<font color='red'>CRITICAL: Restarting</font>");
1.134 albertel 3262: my $execdir=$perlvar{'lonDaemons'};
1.30 harris41 3263: unlink("$execdir/logs/lond.pid");
1.165 albertel 3264: &status("Restarting self (HUP)");
1.1 albertel 3265: exec("$execdir/lond"); # here we go again
3266: }
3267:
1.144 foxr 3268: #
1.148 foxr 3269: # Kill off hashes that describe the host table prior to re-reading it.
3270: # Hashes affected are:
1.200 matthew 3271: # %hostid, %hostdom %hostip %hostdns.
1.148 foxr 3272: #
3273: sub KillHostHashes {
3274: foreach my $key (keys %hostid) {
3275: delete $hostid{$key};
3276: }
3277: foreach my $key (keys %hostdom) {
3278: delete $hostdom{$key};
3279: }
3280: foreach my $key (keys %hostip) {
3281: delete $hostip{$key};
3282: }
1.200 matthew 3283: foreach my $key (keys %hostdns) {
3284: delete $hostdns{$key};
3285: }
1.148 foxr 3286: }
3287: #
3288: # Read in the host table from file and distribute it into the various hashes:
3289: #
3290: # - %hostid - Indexed by IP, the loncapa hostname.
3291: # - %hostdom - Indexed by loncapa hostname, the domain.
3292: # - %hostip - Indexed by hostid, the Ip address of the host.
3293: sub ReadHostTable {
3294:
3295: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
1.200 matthew 3296: my $myloncapaname = $perlvar{'lonHostID'};
3297: Debug("My loncapa name is : $myloncapaname");
1.148 foxr 3298: while (my $configline=<CONFIG>) {
1.178 foxr 3299: if (!($configline =~ /^\s*\#/)) {
3300: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
3301: chomp($ip); $ip=~s/\D+$//;
1.200 matthew 3302: $hostid{$ip}=$id; # LonCAPA name of host by IP.
3303: $hostdom{$id}=$domain; # LonCAPA domain name of host.
3304: $hostip{$id}=$ip; # IP address of host.
3305: $hostdns{$name} = $id; # LonCAPA name of host by DNS.
3306:
3307: if ($id eq $perlvar{'lonHostID'}) {
3308: Debug("Found me in the host table: $name");
3309: $thisserver=$name;
3310: }
1.178 foxr 3311: }
1.148 foxr 3312: }
3313: close(CONFIG);
3314: }
3315: #
3316: # Reload the Apache daemon's state.
1.150 foxr 3317: # This is done by invoking /home/httpd/perl/apachereload
3318: # a setuid perl script that can be root for us to do this job.
1.148 foxr 3319: #
3320: sub ReloadApache {
1.150 foxr 3321: my $execdir = $perlvar{'lonDaemons'};
3322: my $script = $execdir."/apachereload";
3323: system($script);
1.148 foxr 3324: }
3325:
3326: #
1.144 foxr 3327: # Called in response to a USR2 signal.
3328: # - Reread hosts.tab
3329: # - All children connected to hosts that were removed from hosts.tab
3330: # are killed via SIGINT
3331: # - All children connected to previously existing hosts are sent SIGUSR1
3332: # - Our internal hosts hash is updated to reflect the new contents of
3333: # hosts.tab causing connections from hosts added to hosts.tab to
3334: # now be honored.
3335: #
3336: sub UpdateHosts {
1.165 albertel 3337: &status("Reload hosts.tab");
1.147 foxr 3338: logthis('<font color="blue"> Updating connections </font>');
1.148 foxr 3339: #
3340: # The %children hash has the set of IP's we currently have children
3341: # on. These need to be matched against records in the hosts.tab
3342: # Any ip's no longer in the table get killed off they correspond to
3343: # either dropped or changed hosts. Note that the re-read of the table
3344: # will take care of new and changed hosts as connections come into being.
3345:
3346:
3347: KillHostHashes;
3348: ReadHostTable;
3349:
3350: foreach my $child (keys %children) {
3351: my $childip = $children{$child};
3352: if(!$hostid{$childip}) {
1.149 foxr 3353: logthis('<font color="blue"> UpdateHosts killing child '
3354: ." $child for ip $childip </font>");
1.148 foxr 3355: kill('INT', $child);
1.149 foxr 3356: } else {
3357: logthis('<font color="green"> keeping child for ip '
3358: ." $childip (pid=$child) </font>");
1.148 foxr 3359: }
3360: }
3361: ReloadApache;
1.165 albertel 3362: &status("Finished reloading hosts.tab");
1.144 foxr 3363: }
3364:
1.148 foxr 3365:
1.57 www 3366: sub checkchildren {
1.165 albertel 3367: &status("Checking on the children (sending signals)");
1.57 www 3368: &initnewstatus();
3369: &logstatus();
3370: &logthis('Going to check on the children');
1.134 albertel 3371: my $docdir=$perlvar{'lonDocRoot'};
1.61 harris41 3372: foreach (sort keys %children) {
1.221 albertel 3373: #sleep 1;
1.57 www 3374: unless (kill 'USR1' => $_) {
3375: &logthis ('Child '.$_.' is dead');
3376: &logstatus($$.' is dead');
1.221 albertel 3377: delete($children{$_});
1.57 www 3378: }
1.61 harris41 3379: }
1.63 www 3380: sleep 5;
1.212 foxr 3381: $SIG{ALRM} = sub { Debug("timeout");
3382: die "timeout"; };
1.113 albertel 3383: $SIG{__DIE__} = 'DEFAULT';
1.165 albertel 3384: &status("Checking on the children (waiting for reports)");
1.63 www 3385: foreach (sort keys %children) {
3386: unless (-e "$docdir/lon-status/londchld/$_.txt") {
1.113 albertel 3387: eval {
3388: alarm(300);
1.63 www 3389: &logthis('Child '.$_.' did not respond');
1.67 albertel 3390: kill 9 => $_;
1.131 albertel 3391: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
3392: #$subj="LON: $currenthostid killed lond process $_";
3393: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
3394: #$execdir=$perlvar{'lonDaemons'};
3395: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
1.221 albertel 3396: delete($children{$_});
1.113 albertel 3397: alarm(0);
3398: }
1.63 www 3399: }
3400: }
1.113 albertel 3401: $SIG{ALRM} = 'DEFAULT';
1.155 albertel 3402: $SIG{__DIE__} = \&catchexception;
1.165 albertel 3403: &status("Finished checking children");
1.221 albertel 3404: &logthis('Finished Checking children');
1.57 www 3405: }
3406:
1.1 albertel 3407: # --------------------------------------------------------------------- Logging
3408:
3409: sub logthis {
3410: my $message=shift;
3411: my $execdir=$perlvar{'lonDaemons'};
3412: my $fh=IO::File->new(">>$execdir/logs/lond.log");
3413: my $now=time;
3414: my $local=localtime($now);
1.58 www 3415: $lastlog=$local.': '.$message;
1.1 albertel 3416: print $fh "$local ($$): $message\n";
3417: }
3418:
1.77 foxr 3419: # ------------------------- Conditional log if $DEBUG true.
3420: sub Debug {
3421: my $message = shift;
3422: if($DEBUG) {
3423: &logthis($message);
3424: }
3425: }
1.161 foxr 3426:
3427: #
3428: # Sub to do replies to client.. this gives a hook for some
3429: # debug tracing too:
3430: # Parameters:
3431: # fd - File open on client.
3432: # reply - Text to send to client.
3433: # request - Original request from client.
3434: #
3435: sub Reply {
1.192 foxr 3436: my ($fd, $reply, $request) = @_;
1.161 foxr 3437: print $fd $reply;
3438: Debug("Request was $request Reply was $reply");
3439:
1.212 foxr 3440: $Transactions++;
3441:
3442:
3443: }
3444:
3445:
3446: #
3447: # Sub to report a failure.
3448: # This function:
3449: # - Increments the failure statistic counters.
3450: # - Invokes Reply to send the error message to the client.
3451: # Parameters:
3452: # fd - File descriptor open on the client
3453: # reply - Reply text to emit.
3454: # request - The original request message (used by Reply
3455: # to debug if that's enabled.
3456: # Implicit outputs:
3457: # $Failures- The number of failures is incremented.
3458: # Reply (invoked here) sends a message to the
3459: # client:
3460: #
3461: sub Failure {
3462: my $fd = shift;
3463: my $reply = shift;
3464: my $request = shift;
3465:
3466: $Failures++;
3467: Reply($fd, $reply, $request); # That's simple eh?
1.161 foxr 3468: }
1.57 www 3469: # ------------------------------------------------------------------ Log status
3470:
3471: sub logstatus {
1.178 foxr 3472: &status("Doing logging");
3473: my $docdir=$perlvar{'lonDocRoot'};
3474: {
3475: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
1.200 matthew 3476: print $fh $status."\n".$lastlog."\n".time."\n$keymode";
1.178 foxr 3477: $fh->close();
3478: }
1.221 albertel 3479: &status("Finished $$.txt");
3480: {
3481: open(LOG,">>$docdir/lon-status/londstatus.txt");
3482: flock(LOG,LOCK_EX);
3483: print LOG $$."\t".$clientname."\t".$currenthostid."\t"
3484: .$status."\t".$lastlog."\t $keymode\n";
3485: flock(DB,LOCK_UN);
3486: close(LOG);
3487: }
1.178 foxr 3488: &status("Finished logging");
1.57 www 3489: }
3490:
3491: sub initnewstatus {
3492: my $docdir=$perlvar{'lonDocRoot'};
3493: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
3494: my $now=time;
3495: my $local=localtime($now);
3496: print $fh "LOND status $local - parent $$\n\n";
1.64 www 3497: opendir(DIR,"$docdir/lon-status/londchld");
1.134 albertel 3498: while (my $filename=readdir(DIR)) {
1.64 www 3499: unlink("$docdir/lon-status/londchld/$filename");
3500: }
3501: closedir(DIR);
1.57 www 3502: }
3503:
3504: # -------------------------------------------------------------- Status setting
3505:
3506: sub status {
3507: my $what=shift;
3508: my $now=time;
3509: my $local=localtime($now);
1.178 foxr 3510: $status=$local.': '.$what;
3511: $0='lond: '.$what.' '.$local;
1.57 www 3512: }
1.11 www 3513:
3514: # -------------------------------------------------------- Escape Special Chars
3515:
3516: sub escape {
3517: my $str=shift;
3518: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
3519: return $str;
3520: }
3521:
3522: # ----------------------------------------------------- Un-Escape Special Chars
3523:
3524: sub unescape {
3525: my $str=shift;
3526: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
3527: return $str;
3528: }
3529:
1.1 albertel 3530: # ----------------------------------------------------------- Send USR1 to lonc
3531:
3532: sub reconlonc {
3533: my $peerfile=shift;
3534: &logthis("Trying to reconnect for $peerfile");
3535: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
3536: if (my $fh=IO::File->new("$loncfile")) {
3537: my $loncpid=<$fh>;
3538: chomp($loncpid);
3539: if (kill 0 => $loncpid) {
3540: &logthis("lonc at pid $loncpid responding, sending USR1");
3541: kill USR1 => $loncpid;
3542: } else {
1.9 www 3543: &logthis(
1.190 albertel 3544: "<font color='red'>CRITICAL: "
1.9 www 3545: ."lonc at pid $loncpid not responding, giving up</font>");
1.1 albertel 3546: }
3547: } else {
1.190 albertel 3548: &logthis('<font color="red">CRITICAL: lonc not running, giving up</font>');
1.1 albertel 3549: }
3550: }
3551:
3552: # -------------------------------------------------- Non-critical communication
1.11 www 3553:
1.1 albertel 3554: sub subreply {
3555: my ($cmd,$server)=@_;
3556: my $peerfile="$perlvar{'lonSockDir'}/$server";
3557: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
3558: Type => SOCK_STREAM,
3559: Timeout => 10)
3560: or return "con_lost";
3561: print $sclient "$cmd\n";
3562: my $answer=<$sclient>;
3563: chomp($answer);
3564: if (!$answer) { $answer="con_lost"; }
3565: return $answer;
3566: }
3567:
3568: sub reply {
3569: my ($cmd,$server)=@_;
3570: my $answer;
1.115 albertel 3571: if ($server ne $currenthostid) {
1.1 albertel 3572: $answer=subreply($cmd,$server);
3573: if ($answer eq 'con_lost') {
3574: $answer=subreply("ping",$server);
3575: if ($answer ne $server) {
1.115 albertel 3576: &logthis("sub reply: answer != server answer is $answer, server is $server");
1.1 albertel 3577: &reconlonc("$perlvar{'lonSockDir'}/$server");
3578: }
3579: $answer=subreply($cmd,$server);
3580: }
3581: } else {
3582: $answer='self_reply';
3583: }
3584: return $answer;
3585: }
3586:
1.13 www 3587: # -------------------------------------------------------------- Talk to lonsql
3588:
1.12 harris41 3589: sub sqlreply {
3590: my ($cmd)=@_;
3591: my $answer=subsqlreply($cmd);
3592: if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }
3593: return $answer;
3594: }
3595:
3596: sub subsqlreply {
3597: my ($cmd)=@_;
3598: my $unixsock="mysqlsock";
3599: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
3600: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
3601: Type => SOCK_STREAM,
3602: Timeout => 10)
3603: or return "con_lost";
3604: print $sclient "$cmd\n";
3605: my $answer=<$sclient>;
3606: chomp($answer);
3607: if (!$answer) { $answer="con_lost"; }
3608: return $answer;
3609: }
3610:
1.1 albertel 3611: # -------------------------------------------- Return path to profile directory
1.11 www 3612:
1.1 albertel 3613: sub propath {
3614: my ($udom,$uname)=@_;
3615: $udom=~s/\W//g;
3616: $uname=~s/\W//g;
1.16 www 3617: my $subdir=$uname.'__';
1.1 albertel 3618: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
3619: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
3620: return $proname;
3621: }
3622:
3623: # --------------------------------------- Is this the home server of an author?
1.11 www 3624:
1.1 albertel 3625: sub ishome {
3626: my $author=shift;
3627: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
3628: my ($udom,$uname)=split(/\//,$author);
3629: my $proname=propath($udom,$uname);
3630: if (-e $proname) {
3631: return 'owner';
3632: } else {
3633: return 'not_owner';
3634: }
3635: }
3636:
3637: # ======================================================= Continue main program
3638: # ---------------------------------------------------- Fork once and dissociate
3639:
1.134 albertel 3640: my $fpid=fork;
1.1 albertel 3641: exit if $fpid;
1.29 harris41 3642: die "Couldn't fork: $!" unless defined ($fpid);
1.1 albertel 3643:
1.29 harris41 3644: POSIX::setsid() or die "Can't start new session: $!";
1.1 albertel 3645:
3646: # ------------------------------------------------------- Write our PID on disk
3647:
1.134 albertel 3648: my $execdir=$perlvar{'lonDaemons'};
1.1 albertel 3649: open (PIDSAVE,">$execdir/logs/lond.pid");
3650: print PIDSAVE "$$\n";
3651: close(PIDSAVE);
1.190 albertel 3652: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
1.57 www 3653: &status('Starting');
1.1 albertel 3654:
1.106 foxr 3655:
1.1 albertel 3656:
3657: # ----------------------------------------------------- Install signal handlers
3658:
1.57 www 3659:
1.1 albertel 3660: $SIG{CHLD} = \&REAPER;
3661: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
3662: $SIG{HUP} = \&HUPSMAN;
1.57 www 3663: $SIG{USR1} = \&checkchildren;
1.144 foxr 3664: $SIG{USR2} = \&UpdateHosts;
1.106 foxr 3665:
1.148 foxr 3666: # Read the host hashes:
3667:
3668: ReadHostTable;
1.106 foxr 3669:
3670: # --------------------------------------------------------------
3671: # Accept connections. When a connection comes in, it is validated
3672: # and if good, a child process is created to process transactions
3673: # along the connection.
3674:
1.1 albertel 3675: while (1) {
1.165 albertel 3676: &status('Starting accept');
1.106 foxr 3677: $client = $server->accept() or next;
1.165 albertel 3678: &status('Accepted '.$client.' off to spawn');
1.106 foxr 3679: make_new_child($client);
1.165 albertel 3680: &status('Finished spawning');
1.1 albertel 3681: }
3682:
1.212 foxr 3683: sub make_new_child {
3684: my $pid;
3685: # my $cipher; # Now global
3686: my $sigset;
1.178 foxr 3687:
1.212 foxr 3688: $client = shift;
3689: &status('Starting new child '.$client);
3690: &logthis('<font color="green"> Attempting to start child ('.$client.
3691: ")</font>");
3692: # block signal for fork
3693: $sigset = POSIX::SigSet->new(SIGINT);
3694: sigprocmask(SIG_BLOCK, $sigset)
3695: or die "Can't block SIGINT for fork: $!\n";
1.178 foxr 3696:
1.212 foxr 3697: die "fork: $!" unless defined ($pid = fork);
1.178 foxr 3698:
1.212 foxr 3699: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
3700: # connection liveness.
1.178 foxr 3701:
1.212 foxr 3702: #
3703: # Figure out who we're talking to so we can record the peer in
3704: # the pid hash.
3705: #
3706: my $caller = getpeername($client);
3707: my ($port,$iaddr);
3708: if (defined($caller) && length($caller) > 0) {
3709: ($port,$iaddr)=unpack_sockaddr_in($caller);
3710: } else {
3711: &logthis("Unable to determine who caller was, getpeername returned nothing");
3712: }
3713: if (defined($iaddr)) {
3714: $clientip = inet_ntoa($iaddr);
3715: Debug("Connected with $clientip");
3716: $clientdns = gethostbyaddr($iaddr, AF_INET);
3717: Debug("Connected with $clientdns by name");
3718: } else {
3719: &logthis("Unable to determine clientip");
3720: $clientip='Unavailable';
3721: }
3722:
3723: if ($pid) {
3724: # Parent records the child's birth and returns.
3725: sigprocmask(SIG_UNBLOCK, $sigset)
3726: or die "Can't unblock SIGINT for fork: $!\n";
3727: $children{$pid} = $clientip;
3728: &status('Started child '.$pid);
3729: return;
3730: } else {
3731: # Child can *not* return from this subroutine.
3732: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
3733: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
3734: #don't get intercepted
3735: $SIG{USR1}= \&logstatus;
3736: $SIG{ALRM}= \&timeout;
3737: $lastlog='Forked ';
3738: $status='Forked';
1.178 foxr 3739:
1.212 foxr 3740: # unblock signals
3741: sigprocmask(SIG_UNBLOCK, $sigset)
3742: or die "Can't unblock SIGINT for fork: $!\n";
1.178 foxr 3743:
1.212 foxr 3744: # my $tmpsnum=0; # Now global
3745: #---------------------------------------------------- kerberos 5 initialization
3746: &Authen::Krb5::init_context();
3747: &Authen::Krb5::init_ets();
1.209 albertel 3748:
1.212 foxr 3749: &status('Accepted connection');
3750: # =============================================================================
3751: # do something with the connection
3752: # -----------------------------------------------------------------------------
3753: # see if we know client and 'check' for spoof IP by ineffective challenge
1.178 foxr 3754:
1.212 foxr 3755: ReadManagerTable; # May also be a manager!!
3756:
3757: my $clientrec=($hostid{$clientip} ne undef);
3758: my $ismanager=($managers{$clientip} ne undef);
3759: $clientname = "[unknonwn]";
3760: if($clientrec) { # Establish client type.
3761: $ConnectionType = "client";
3762: $clientname = $hostid{$clientip};
3763: if($ismanager) {
3764: $ConnectionType = "both";
3765: }
3766: } else {
3767: $ConnectionType = "manager";
3768: $clientname = $managers{$clientip};
3769: }
3770: my $clientok;
1.178 foxr 3771:
1.212 foxr 3772: if ($clientrec || $ismanager) {
3773: &status("Waiting for init from $clientip $clientname");
3774: &logthis('<font color="yellow">INFO: Connection, '.
3775: $clientip.
3776: " ($clientname) connection type = $ConnectionType </font>" );
3777: &status("Connecting $clientip ($clientname))");
3778: my $remotereq=<$client>;
3779: chomp($remotereq);
3780: Debug("Got init: $remotereq");
3781: my $inikeyword = split(/:/, $remotereq);
3782: if ($remotereq =~ /^init/) {
3783: &sethost("sethost:$perlvar{'lonHostID'}");
3784: #
3785: # If the remote is attempting a local init... give that a try:
3786: #
3787: my ($i, $inittype) = split(/:/, $remotereq);
1.209 albertel 3788:
1.212 foxr 3789: # If the connection type is ssl, but I didn't get my
3790: # certificate files yet, then I'll drop back to
3791: # insecure (if allowed).
3792:
3793: if($inittype eq "ssl") {
3794: my ($ca, $cert) = lonssl::CertificateFile;
3795: my $kfile = lonssl::KeyFile;
3796: if((!$ca) ||
3797: (!$cert) ||
3798: (!$kfile)) {
3799: $inittype = ""; # This forces insecure attempt.
3800: &logthis("<font color=\"blue\"> Certificates not "
3801: ."installed -- trying insecure auth</font>");
1.224 foxr 3802: } else { # SSL certificates are in place so
1.212 foxr 3803: } # Leave the inittype alone.
3804: }
3805:
3806: if($inittype eq "local") {
3807: my $key = LocalConnection($client, $remotereq);
3808: if($key) {
3809: Debug("Got local key $key");
3810: $clientok = 1;
3811: my $cipherkey = pack("H32", $key);
3812: $cipher = new IDEA($cipherkey);
3813: print $client "ok:local\n";
3814: &logthis('<font color="green"'
3815: . "Successful local authentication </font>");
3816: $keymode = "local"
1.178 foxr 3817: } else {
1.212 foxr 3818: Debug("Failed to get local key");
3819: $clientok = 0;
3820: shutdown($client, 3);
3821: close $client;
1.178 foxr 3822: }
1.212 foxr 3823: } elsif ($inittype eq "ssl") {
3824: my $key = SSLConnection($client);
3825: if ($key) {
3826: $clientok = 1;
3827: my $cipherkey = pack("H32", $key);
3828: $cipher = new IDEA($cipherkey);
3829: &logthis('<font color="green">'
3830: ."Successfull ssl authentication with $clientname </font>");
3831: $keymode = "ssl";
3832:
1.178 foxr 3833: } else {
1.212 foxr 3834: $clientok = 0;
3835: close $client;
1.178 foxr 3836: }
1.212 foxr 3837:
3838: } else {
3839: my $ok = InsecureConnection($client);
3840: if($ok) {
3841: $clientok = 1;
3842: &logthis('<font color="green">'
3843: ."Successful insecure authentication with $clientname </font>");
3844: print $client "ok\n";
3845: $keymode = "insecure";
1.178 foxr 3846: } else {
1.212 foxr 3847: &logthis('<font color="yellow">'
3848: ."Attempted insecure connection disallowed </font>");
3849: close $client;
3850: $clientok = 0;
1.178 foxr 3851:
3852: }
3853: }
1.212 foxr 3854: } else {
3855: &logthis(
3856: "<font color='blue'>WARNING: "
3857: ."$clientip failed to initialize: >$remotereq< </font>");
3858: &status('No init '.$clientip);
3859: }
3860:
3861: } else {
3862: &logthis(
3863: "<font color='blue'>WARNING: Unknown client $clientip</font>");
3864: &status('Hung up on '.$clientip);
3865: }
3866:
3867: if ($clientok) {
3868: # ---------------- New known client connecting, could mean machine online again
3869:
3870: foreach my $id (keys(%hostip)) {
3871: if ($hostip{$id} ne $clientip ||
3872: $hostip{$currenthostid} eq $clientip) {
3873: # no need to try to do recon's to myself
3874: next;
3875: }
3876: &reconlonc("$perlvar{'lonSockDir'}/$id");
3877: }
3878: &logthis("<font color='green'>Established connection: $clientname</font>");
3879: &status('Will listen to '.$clientname);
3880: # ------------------------------------------------------------ Process requests
3881: my $keep_going = 1;
3882: my $user_input;
3883: while(($user_input = get_request) && $keep_going) {
3884: alarm(120);
3885: Debug("Main: Got $user_input\n");
3886: $keep_going = &process_request($user_input);
1.178 foxr 3887: alarm(0);
1.212 foxr 3888: &status('Listening to '.$clientname." ($keymode)");
1.161 foxr 3889: }
1.212 foxr 3890:
1.59 www 3891: # --------------------------------------------- client unknown or fishy, refuse
1.212 foxr 3892: } else {
1.161 foxr 3893: print $client "refused\n";
3894: $client->close();
1.190 albertel 3895: &logthis("<font color='blue'>WARNING: "
1.161 foxr 3896: ."Rejected client $clientip, closing connection</font>");
3897: }
1.212 foxr 3898: }
1.161 foxr 3899:
1.1 albertel 3900: # =============================================================================
1.161 foxr 3901:
1.190 albertel 3902: &logthis("<font color='red'>CRITICAL: "
1.161 foxr 3903: ."Disconnect from $clientip ($clientname)</font>");
3904:
3905:
3906: # this exit is VERY important, otherwise the child will become
3907: # a producer of more and more children, forking yourself into
3908: # process death.
3909: exit;
1.106 foxr 3910:
1.78 foxr 3911: }
3912:
3913:
3914: #
3915: # Checks to see if the input roleput request was to set
3916: # an author role. If so, invokes the lchtmldir script to set
3917: # up a correct public_html
3918: # Parameters:
3919: # request - The request sent to the rolesput subchunk.
3920: # We're looking for /domain/_au
3921: # domain - The domain in which the user is having roles doctored.
3922: # user - Name of the user for which the role is being put.
3923: # authtype - The authentication type associated with the user.
3924: #
3925: sub ManagePermissions
3926: {
1.192 foxr 3927:
3928: my ($request, $domain, $user, $authtype) = @_;
1.78 foxr 3929:
3930: # See if the request is of the form /$domain/_au
3931: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
3932: my $execdir = $perlvar{'lonDaemons'};
3933: my $userhome= "/home/$user" ;
1.134 albertel 3934: &logthis("system $execdir/lchtmldir $userhome $user $authtype");
1.78 foxr 3935: system("$execdir/lchtmldir $userhome $user $authtype");
3936: }
3937: }
1.222 foxr 3938:
3939:
3940: #
3941: # Return the full path of a user password file, whether it exists or not.
3942: # Parameters:
3943: # domain - Domain in which the password file lives.
3944: # user - name of the user.
3945: # Returns:
3946: # Full passwd path:
3947: #
3948: sub password_path {
3949: my ($domain, $user) = @_;
3950:
3951:
3952: my $path = &propath($domain, $user);
3953: $path .= "/passwd";
3954:
3955: return $path;
3956: }
3957:
3958: # Password Filename
3959: # Returns the path to a passwd file given domain and user... only if
3960: # it exists.
3961: # Parameters:
3962: # domain - Domain in which to search.
3963: # user - username.
3964: # Returns:
3965: # - If the password file exists returns its path.
3966: # - If the password file does not exist, returns undefined.
3967: #
3968: sub password_filename {
3969: my ($domain, $user) = @_;
3970:
3971: Debug ("PasswordFilename called: dom = $domain user = $user");
3972:
3973: my $path = &password_path($domain, $user);
3974: Debug("PasswordFilename got path: $path");
3975: if(-e $path) {
3976: return $path;
3977: } else {
3978: return undef;
3979: }
3980: }
3981:
3982: #
3983: # Rewrite the contents of the user's passwd file.
3984: # Parameters:
3985: # domain - domain of the user.
3986: # name - User's name.
3987: # contents - New contents of the file.
3988: # Returns:
3989: # 0 - Failed.
3990: # 1 - Success.
3991: #
3992: sub rewrite_password_file {
3993: my ($domain, $user, $contents) = @_;
3994:
3995: my $file = &password_filename($domain, $user);
3996: if (defined $file) {
3997: my $pf = IO::File->new(">$file");
3998: if($pf) {
3999: print $pf "$contents\n";
4000: return 1;
4001: } else {
4002: return 0;
4003: }
4004: } else {
4005: return 0;
4006: }
4007:
4008: }
4009:
1.78 foxr 4010: #
1.222 foxr 4011: # get_auth_type - Determines the authorization type of a user in a domain.
1.78 foxr 4012:
4013: # Returns the authorization type or nouser if there is no such user.
4014: #
1.222 foxr 4015: sub get_auth_type
1.78 foxr 4016: {
1.192 foxr 4017:
4018: my ($domain, $user) = @_;
1.78 foxr 4019:
1.222 foxr 4020: Debug("get_auth_type( $domain, $user ) \n");
1.78 foxr 4021: my $proname = &propath($domain, $user);
4022: my $passwdfile = "$proname/passwd";
4023: if( -e $passwdfile ) {
4024: my $pf = IO::File->new($passwdfile);
4025: my $realpassword = <$pf>;
4026: chomp($realpassword);
1.79 foxr 4027: Debug("Password info = $realpassword\n");
1.78 foxr 4028: my ($authtype, $contentpwd) = split(/:/, $realpassword);
1.79 foxr 4029: Debug("Authtype = $authtype, content = $contentpwd\n");
1.78 foxr 4030: my $availinfo = '';
1.91 albertel 4031: if($authtype eq 'krb4' or $authtype eq 'krb5') {
1.78 foxr 4032: $availinfo = $contentpwd;
4033: }
1.79 foxr 4034:
1.78 foxr 4035: return "$authtype:$availinfo";
1.224 foxr 4036: } else {
1.79 foxr 4037: Debug("Returning nouser");
1.78 foxr 4038: return "nouser";
4039: }
1.1 albertel 4040: }
4041:
1.220 foxr 4042: #
4043: # Validate a user given their domain, name and password. This utility
4044: # function is used by both AuthenticateHandler and ChangePasswordHandler
4045: # to validate the login credentials of a user.
4046: # Parameters:
4047: # $domain - The domain being logged into (this is required due to
4048: # the capability for multihomed systems.
4049: # $user - The name of the user being validated.
4050: # $password - The user's propoposed password.
4051: #
4052: # Returns:
4053: # 1 - The domain,user,pasword triplet corresponds to a valid
4054: # user.
4055: # 0 - The domain,user,password triplet is not a valid user.
4056: #
4057: sub validate_user {
4058: my ($domain, $user, $password) = @_;
4059:
4060:
4061: # Why negative ~pi you may well ask? Well this function is about
4062: # authentication, and therefore very important to get right.
4063: # I've initialized the flag that determines whether or not I've
4064: # validated correctly to a value it's not supposed to get.
4065: # At the end of this function. I'll ensure that it's not still that
4066: # value so we don't just wind up returning some accidental value
4067: # as a result of executing an unforseen code path that
4068: # did not set $validated.
4069:
4070: my $validated = -3.14159;
4071:
4072: # How we authenticate is determined by the type of authentication
4073: # the user has been assigned. If the authentication type is
4074: # "nouser", the user does not exist so we will return 0.
4075:
1.222 foxr 4076: my $contents = &get_auth_type($domain, $user);
1.220 foxr 4077: my ($howpwd, $contentpwd) = split(/:/, $contents);
4078:
4079: my $null = pack("C",0); # Used by kerberos auth types.
4080:
4081: if ($howpwd ne 'nouser') {
4082:
4083: if($howpwd eq "internal") { # Encrypted is in local password file.
4084: $validated = (crypt($password, $contentpwd) eq $contentpwd);
4085: }
4086: elsif ($howpwd eq "unix") { # User is a normal unix user.
4087: $contentpwd = (getpwnam($user))[1];
4088: if($contentpwd) {
4089: if($contentpwd eq 'x') { # Shadow password file...
4090: my $pwauth_path = "/usr/local/sbin/pwauth";
4091: open PWAUTH, "|$pwauth_path" or
4092: die "Cannot invoke authentication";
4093: print PWAUTH "$user\n$password\n";
4094: close PWAUTH;
4095: $validated = ! $?;
4096:
4097: } else { # Passwords in /etc/passwd.
4098: $validated = (crypt($password,
4099: $contentpwd) eq $contentpwd);
4100: }
4101: } else {
4102: $validated = 0;
4103: }
4104: }
4105: elsif ($howpwd eq "krb4") { # user is in kerberos 4 auth. domain.
4106: if(! ($password =~ /$null/) ) {
4107: my $k4error = &Authen::Krb4::get_pw_in_tkt($user,
4108: "",
4109: $contentpwd,,
4110: 'krbtgt',
4111: $contentpwd,
4112: 1,
4113: $password);
4114: if(!$k4error) {
4115: $validated = 1;
1.224 foxr 4116: } else {
1.220 foxr 4117: $validated = 0;
4118: &logthis('krb4: '.$user.', '.$contentpwd.', '.
4119: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
4120: }
1.224 foxr 4121: } else {
1.220 foxr 4122: $validated = 0; # Password has a match with null.
4123: }
1.224 foxr 4124: } elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain.
1.220 foxr 4125: if(!($password =~ /$null/)) { # Null password not allowed.
4126: my $krbclient = &Authen::Krb5::parse_name($user.'@'
4127: .$contentpwd);
4128: my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd;
4129: my $krbserver = &Authen::Krb5::parse_name($krbservice);
4130: my $credentials= &Authen::Krb5::cc_default();
4131: $credentials->initialize($krbclient);
4132: my $krbreturn = &Authen::KRb5::get_in_tkt_with_password($krbclient,
4133: $krbserver,
4134: $password,
4135: $credentials);
4136: $validated = ($krbreturn == 1);
1.224 foxr 4137: } else {
1.220 foxr 4138: $validated = 0;
4139: }
1.224 foxr 4140: } elsif ($howpwd eq "localauth") {
1.220 foxr 4141: # Authenticate via installation specific authentcation method:
4142: $validated = &localauth::localauth($user,
4143: $password,
4144: $contentpwd);
1.224 foxr 4145: } else { # Unrecognized auth is also bad.
1.220 foxr 4146: $validated = 0;
4147: }
4148: } else {
4149: $validated = 0;
4150: }
4151: #
4152: # $validated has the correct stat of the authentication:
4153: #
4154:
4155: unless ($validated != -3.14159) {
4156: die "ValidateUser - failed to set the value of validated";
4157: }
4158: return $validated;
4159: }
4160:
4161:
1.84 albertel 4162: sub addline {
4163: my ($fname,$hostid,$ip,$newline)=@_;
4164: my $contents;
4165: my $found=0;
4166: my $expr='^'.$hostid.':'.$ip.':';
4167: $expr =~ s/\./\\\./g;
1.134 albertel 4168: my $sh;
1.84 albertel 4169: if ($sh=IO::File->new("$fname.subscription")) {
4170: while (my $subline=<$sh>) {
4171: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
4172: }
4173: $sh->close();
4174: }
4175: $sh=IO::File->new(">$fname.subscription");
4176: if ($contents) { print $sh $contents; }
4177: if ($newline) { print $sh $newline; }
4178: $sh->close();
4179: return $found;
1.86 www 4180: }
4181:
4182: sub getchat {
1.122 www 4183: my ($cdom,$cname,$udom,$uname)=@_;
1.87 www 4184: my %hash;
4185: my $proname=&propath($cdom,$cname);
4186: my @entries=();
1.88 albertel 4187: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
4188: &GDBM_READER(),0640)) {
4189: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
4190: untie %hash;
1.123 www 4191: }
1.124 www 4192: my @participants=();
1.134 albertel 4193: my $cutoff=time-60;
1.123 www 4194: if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db",
1.124 www 4195: &GDBM_WRCREAT(),0640)) {
4196: $hash{$uname.':'.$udom}=time;
1.123 www 4197: foreach (sort keys %hash) {
4198: if ($hash{$_}>$cutoff) {
1.124 www 4199: $participants[$#participants+1]='active_participant:'.$_;
1.123 www 4200: }
4201: }
4202: untie %hash;
1.86 www 4203: }
1.124 www 4204: return (@participants,@entries);
1.86 www 4205: }
4206:
4207: sub chatadd {
1.88 albertel 4208: my ($cdom,$cname,$newchat)=@_;
4209: my %hash;
4210: my $proname=&propath($cdom,$cname);
4211: my @entries=();
1.142 www 4212: my $time=time;
1.88 albertel 4213: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
4214: &GDBM_WRCREAT(),0640)) {
4215: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
4216: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
4217: my ($thentime,$idnum)=split(/\_/,$lastid);
4218: my $newid=$time.'_000000';
4219: if ($thentime==$time) {
4220: $idnum=~s/^0+//;
4221: $idnum++;
4222: $idnum=substr('000000'.$idnum,-6,6);
4223: $newid=$time.'_'.$idnum;
4224: }
4225: $hash{$newid}=$newchat;
4226: my $expired=$time-3600;
4227: foreach (keys %hash) {
4228: my ($thistime)=($_=~/(\d+)\_/);
4229: if ($thistime<$expired) {
1.89 www 4230: delete $hash{$_};
1.88 albertel 4231: }
4232: }
4233: untie %hash;
1.142 www 4234: }
4235: {
4236: my $hfh;
4237: if ($hfh=IO::File->new(">>$proname/chatroom.log")) {
4238: print $hfh "$time:".&unescape($newchat)."\n";
4239: }
1.86 www 4240: }
1.84 albertel 4241: }
4242:
4243: sub unsub {
4244: my ($fname,$clientip)=@_;
4245: my $result;
1.188 foxr 4246: my $unsubs = 0; # Number of successful unsubscribes:
4247:
4248:
4249: # An old way subscriptions were handled was to have a
4250: # subscription marker file:
4251:
4252: Debug("Attempting unlink of $fname.$clientname");
1.161 foxr 4253: if (unlink("$fname.$clientname")) {
1.188 foxr 4254: $unsubs++; # Successful unsub via marker file.
4255: }
4256:
4257: # The more modern way to do it is to have a subscription list
4258: # file:
4259:
1.84 albertel 4260: if (-e "$fname.subscription") {
1.161 foxr 4261: my $found=&addline($fname,$clientname,$clientip,'');
1.188 foxr 4262: if ($found) {
4263: $unsubs++;
4264: }
4265: }
4266:
4267: # If either or both of these mechanisms succeeded in unsubscribing a
4268: # resource we can return ok:
4269:
4270: if($unsubs) {
4271: $result = "ok\n";
1.84 albertel 4272: } else {
1.188 foxr 4273: $result = "not_subscribed\n";
1.84 albertel 4274: }
1.188 foxr 4275:
1.84 albertel 4276: return $result;
4277: }
4278:
1.101 www 4279: sub currentversion {
4280: my $fname=shift;
4281: my $version=-1;
4282: my $ulsdir='';
4283: if ($fname=~/^(.+)\/[^\/]+$/) {
4284: $ulsdir=$1;
4285: }
1.114 albertel 4286: my ($fnamere1,$fnamere2);
4287: # remove version if already specified
1.101 www 4288: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
1.114 albertel 4289: # get the bits that go before and after the version number
4290: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
4291: $fnamere1=$1;
4292: $fnamere2='.'.$2;
4293: }
1.101 www 4294: if (-e $fname) { $version=1; }
4295: if (-e $ulsdir) {
1.134 albertel 4296: if(-d $ulsdir) {
4297: if (opendir(LSDIR,$ulsdir)) {
4298: my $ulsfn;
4299: while ($ulsfn=readdir(LSDIR)) {
1.101 www 4300: # see if this is a regular file (ignore links produced earlier)
1.134 albertel 4301: my $thisfile=$ulsdir.'/'.$ulsfn;
4302: unless (-l $thisfile) {
1.160 www 4303: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
1.134 albertel 4304: if ($1>$version) { $version=$1; }
4305: }
4306: }
4307: }
4308: closedir(LSDIR);
4309: $version++;
4310: }
4311: }
4312: }
4313: return $version;
1.101 www 4314: }
4315:
4316: sub thisversion {
4317: my $fname=shift;
4318: my $version=-1;
4319: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
4320: $version=$1;
4321: }
4322: return $version;
4323: }
4324:
1.84 albertel 4325: sub subscribe {
4326: my ($userinput,$clientip)=@_;
4327: my $result;
4328: my ($cmd,$fname)=split(/:/,$userinput);
4329: my $ownership=&ishome($fname);
4330: if ($ownership eq 'owner') {
1.101 www 4331: # explitly asking for the current version?
4332: unless (-e $fname) {
4333: my $currentversion=¤tversion($fname);
4334: if (&thisversion($fname)==$currentversion) {
4335: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
4336: my $root=$1;
4337: my $extension=$2;
4338: symlink($root.'.'.$extension,
4339: $root.'.'.$currentversion.'.'.$extension);
1.102 www 4340: unless ($extension=~/\.meta$/) {
4341: symlink($root.'.'.$extension.'.meta',
4342: $root.'.'.$currentversion.'.'.$extension.'.meta');
4343: }
1.101 www 4344: }
4345: }
4346: }
1.84 albertel 4347: if (-e $fname) {
4348: if (-d $fname) {
4349: $result="directory\n";
4350: } else {
1.161 foxr 4351: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
1.134 albertel 4352: my $now=time;
1.161 foxr 4353: my $found=&addline($fname,$clientname,$clientip,
4354: "$clientname:$clientip:$now\n");
1.84 albertel 4355: if ($found) { $result="$fname\n"; }
4356: # if they were subscribed to only meta data, delete that
4357: # subscription, when you subscribe to a file you also get
4358: # the metadata
4359: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
4360: $fname=~s/\/home\/httpd\/html\/res/raw/;
4361: $fname="http://$thisserver/".$fname;
4362: $result="$fname\n";
4363: }
4364: } else {
4365: $result="not_found\n";
4366: }
4367: } else {
4368: $result="rejected\n";
4369: }
4370: return $result;
4371: }
1.91 albertel 4372:
4373: sub make_passwd_file {
1.98 foxr 4374: my ($uname, $umode,$npass,$passfilename)=@_;
1.91 albertel 4375: my $result="ok\n";
4376: if ($umode eq 'krb4' or $umode eq 'krb5') {
4377: {
4378: my $pf = IO::File->new(">$passfilename");
4379: print $pf "$umode:$npass\n";
4380: }
4381: } elsif ($umode eq 'internal') {
4382: my $salt=time;
4383: $salt=substr($salt,6,2);
4384: my $ncpass=crypt($npass,$salt);
4385: {
4386: &Debug("Creating internal auth");
4387: my $pf = IO::File->new(">$passfilename");
4388: print $pf "internal:$ncpass\n";
4389: }
4390: } elsif ($umode eq 'localauth') {
4391: {
4392: my $pf = IO::File->new(">$passfilename");
4393: print $pf "localauth:$npass\n";
4394: }
4395: } elsif ($umode eq 'unix') {
4396: {
1.186 foxr 4397: #
4398: # Don't allow the creation of privileged accounts!!! that would
4399: # be real bad!!!
4400: #
4401: my $uid = getpwnam($uname);
4402: if((defined $uid) && ($uid == 0)) {
4403: &logthis(">>>Attempted to create privilged account blocked");
4404: return "no_priv_account_error\n";
4405: }
4406:
1.223 foxr 4407: my $execpath ="$perlvar{'lonDaemons'}/"."lcuseradd";
1.224 foxr 4408:
4409: my $lc_error_file = $execdir."/tmp/lcuseradd".$$.".status";
1.91 albertel 4410: {
4411: &Debug("Executing external: ".$execpath);
1.98 foxr 4412: &Debug("user = ".$uname.", Password =". $npass);
1.132 matthew 4413: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
1.91 albertel 4414: print $se "$uname\n";
4415: print $se "$npass\n";
4416: print $se "$npass\n";
1.223 foxr 4417: print $se "$lc_error_file\n"; # Status -> unique file.
1.97 foxr 4418: }
1.223 foxr 4419: my $error = IO::File->new("< $lc_error_file");
4420: my $useraddok = <$error>;
4421: $error->close;
4422: unlink($lc_error_file);
4423:
4424: chomp $useraddok;
4425:
1.97 foxr 4426: if($useraddok > 0) {
1.223 foxr 4427: my $error_text = &lcuseraddstrerror($useraddok);
4428: &logthis("Failed lcuseradd: $error_text");
4429: $result = "lcuseradd_failed:$error_text\n";
1.224 foxr 4430: } else {
1.223 foxr 4431: my $pf = IO::File->new(">$passfilename");
4432: print $pf "unix:\n";
1.91 albertel 4433: }
4434: }
4435: } elsif ($umode eq 'none') {
4436: {
1.223 foxr 4437: my $pf = IO::File->new("> $passfilename");
1.91 albertel 4438: print $pf "none:\n";
4439: }
4440: } else {
4441: $result="auth_mode_error\n";
4442: }
4443: return $result;
1.121 albertel 4444: }
4445:
4446: sub sethost {
4447: my ($remotereq) = @_;
4448: my (undef,$hostid)=split(/:/,$remotereq);
4449: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
4450: if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
1.200 matthew 4451: $currenthostid =$hostid;
1.121 albertel 4452: $currentdomainid=$hostdom{$hostid};
4453: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
4454: } else {
4455: &logthis("Requested host id $hostid not an alias of ".
4456: $perlvar{'lonHostID'}." refusing connection");
4457: return 'unable_to_set';
4458: }
4459: return 'ok';
4460: }
4461:
4462: sub version {
4463: my ($userinput)=@_;
4464: $remoteVERSION=(split(/:/,$userinput))[1];
4465: return "version:$VERSION";
1.127 albertel 4466: }
1.178 foxr 4467:
1.128 albertel 4468: #There is a copy of this in lonnet.pm
1.127 albertel 4469: sub userload {
4470: my $numusers=0;
4471: {
4472: opendir(LONIDS,$perlvar{'lonIDsDir'});
4473: my $filename;
4474: my $curtime=time;
4475: while ($filename=readdir(LONIDS)) {
4476: if ($filename eq '.' || $filename eq '..') {next;}
1.138 albertel 4477: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
1.159 albertel 4478: if ($curtime-$mtime < 1800) { $numusers++; }
1.127 albertel 4479: }
4480: closedir(LONIDS);
4481: }
4482: my $userloadpercent=0;
4483: my $maxuserload=$perlvar{'lonUserLoadLim'};
4484: if ($maxuserload) {
1.129 albertel 4485: $userloadpercent=100*$numusers/$maxuserload;
1.127 albertel 4486: }
1.130 albertel 4487: $userloadpercent=sprintf("%.2f",$userloadpercent);
1.127 albertel 4488: return $userloadpercent;
1.91 albertel 4489: }
4490:
1.205 raeburn 4491: # Routines for serializing arrays and hashes (copies from lonnet)
4492:
4493: sub array2str {
4494: my (@array) = @_;
4495: my $result=&arrayref2str(\@array);
4496: $result=~s/^__ARRAY_REF__//;
4497: $result=~s/__END_ARRAY_REF__$//;
4498: return $result;
4499: }
4500:
4501: sub arrayref2str {
4502: my ($arrayref) = @_;
4503: my $result='__ARRAY_REF__';
4504: foreach my $elem (@$arrayref) {
4505: if(ref($elem) eq 'ARRAY') {
4506: $result.=&arrayref2str($elem).'&';
4507: } elsif(ref($elem) eq 'HASH') {
4508: $result.=&hashref2str($elem).'&';
4509: } elsif(ref($elem)) {
4510: #print("Got a ref of ".(ref($elem))." skipping.");
4511: } else {
4512: $result.=&escape($elem).'&';
4513: }
4514: }
4515: $result=~s/\&$//;
4516: $result .= '__END_ARRAY_REF__';
4517: return $result;
4518: }
4519:
4520: sub hash2str {
4521: my (%hash) = @_;
4522: my $result=&hashref2str(\%hash);
4523: $result=~s/^__HASH_REF__//;
4524: $result=~s/__END_HASH_REF__$//;
4525: return $result;
4526: }
4527:
4528: sub hashref2str {
4529: my ($hashref)=@_;
4530: my $result='__HASH_REF__';
4531: foreach (sort(keys(%$hashref))) {
4532: if (ref($_) eq 'ARRAY') {
4533: $result.=&arrayref2str($_).'=';
4534: } elsif (ref($_) eq 'HASH') {
4535: $result.=&hashref2str($_).'=';
4536: } elsif (ref($_)) {
4537: $result.='=';
4538: #print("Got a ref of ".(ref($_))." skipping.");
4539: } else {
4540: if ($_) {$result.=&escape($_).'=';} else { last; }
4541: }
4542:
4543: if(ref($hashref->{$_}) eq 'ARRAY') {
4544: $result.=&arrayref2str($hashref->{$_}).'&';
4545: } elsif(ref($hashref->{$_}) eq 'HASH') {
4546: $result.=&hashref2str($hashref->{$_}).'&';
4547: } elsif(ref($hashref->{$_})) {
4548: $result.='&';
4549: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
4550: } else {
4551: $result.=&escape($hashref->{$_}).'&';
4552: }
4553: }
4554: $result=~s/\&$//;
4555: $result .= '__END_HASH_REF__';
4556: return $result;
4557: }
1.200 matthew 4558:
1.61 harris41 4559: # ----------------------------------- POD (plain old documentation, CPAN style)
4560:
4561: =head1 NAME
4562:
4563: lond - "LON Daemon" Server (port "LOND" 5663)
4564:
4565: =head1 SYNOPSIS
4566:
1.74 harris41 4567: Usage: B<lond>
4568:
4569: Should only be run as user=www. This is a command-line script which
4570: is invoked by B<loncron>. There is no expectation that a typical user
4571: will manually start B<lond> from the command-line. (In other words,
4572: DO NOT START B<lond> YOURSELF.)
1.61 harris41 4573:
4574: =head1 DESCRIPTION
4575:
1.74 harris41 4576: There are two characteristics associated with the running of B<lond>,
4577: PROCESS MANAGEMENT (starting, stopping, handling child processes)
4578: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
4579: subscriptions, etc). These are described in two large
4580: sections below.
4581:
4582: B<PROCESS MANAGEMENT>
4583:
1.61 harris41 4584: Preforker - server who forks first. Runs as a daemon. HUPs.
4585: Uses IDEA encryption
4586:
1.74 harris41 4587: B<lond> forks off children processes that correspond to the other servers
4588: in the network. Management of these processes can be done at the
4589: parent process level or the child process level.
4590:
4591: B<logs/lond.log> is the location of log messages.
4592:
4593: The process management is now explained in terms of linux shell commands,
4594: subroutines internal to this code, and signal assignments:
4595:
4596: =over 4
4597:
4598: =item *
4599:
4600: PID is stored in B<logs/lond.pid>
4601:
4602: This is the process id number of the parent B<lond> process.
4603:
4604: =item *
4605:
4606: SIGTERM and SIGINT
4607:
4608: Parent signal assignment:
4609: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
4610:
4611: Child signal assignment:
4612: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
4613: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
4614: to restart a new child.)
4615:
4616: Command-line invocations:
4617: B<kill> B<-s> SIGTERM I<PID>
4618: B<kill> B<-s> SIGINT I<PID>
4619:
4620: Subroutine B<HUNTSMAN>:
4621: This is only invoked for the B<lond> parent I<PID>.
4622: This kills all the children, and then the parent.
4623: The B<lonc.pid> file is cleared.
4624:
4625: =item *
4626:
4627: SIGHUP
4628:
4629: Current bug:
4630: This signal can only be processed the first time
4631: on the parent process. Subsequent SIGHUP signals
4632: have no effect.
4633:
4634: Parent signal assignment:
4635: $SIG{HUP} = \&HUPSMAN;
4636:
4637: Child signal assignment:
4638: none (nothing happens)
4639:
4640: Command-line invocations:
4641: B<kill> B<-s> SIGHUP I<PID>
4642:
4643: Subroutine B<HUPSMAN>:
4644: This is only invoked for the B<lond> parent I<PID>,
4645: This kills all the children, and then the parent.
4646: The B<lond.pid> file is cleared.
4647:
4648: =item *
4649:
4650: SIGUSR1
4651:
4652: Parent signal assignment:
4653: $SIG{USR1} = \&USRMAN;
4654:
4655: Child signal assignment:
4656: $SIG{USR1}= \&logstatus;
4657:
4658: Command-line invocations:
4659: B<kill> B<-s> SIGUSR1 I<PID>
4660:
4661: Subroutine B<USRMAN>:
4662: When invoked for the B<lond> parent I<PID>,
4663: SIGUSR1 is sent to all the children, and the status of
4664: each connection is logged.
1.144 foxr 4665:
4666: =item *
4667:
4668: SIGUSR2
4669:
4670: Parent Signal assignment:
4671: $SIG{USR2} = \&UpdateHosts
4672:
4673: Child signal assignment:
4674: NONE
4675:
1.74 harris41 4676:
4677: =item *
4678:
4679: SIGCHLD
4680:
4681: Parent signal assignment:
4682: $SIG{CHLD} = \&REAPER;
4683:
4684: Child signal assignment:
4685: none
4686:
4687: Command-line invocations:
4688: B<kill> B<-s> SIGCHLD I<PID>
4689:
4690: Subroutine B<REAPER>:
4691: This is only invoked for the B<lond> parent I<PID>.
4692: Information pertaining to the child is removed.
4693: The socket port is cleaned up.
4694:
4695: =back
4696:
4697: B<SERVER-SIDE ACTIVITIES>
4698:
4699: Server-side information can be accepted in an encrypted or non-encrypted
4700: method.
4701:
4702: =over 4
4703:
4704: =item ping
4705:
4706: Query a client in the hosts.tab table; "Are you there?"
4707:
4708: =item pong
4709:
4710: Respond to a ping query.
4711:
4712: =item ekey
4713:
4714: Read in encrypted key, make cipher. Respond with a buildkey.
4715:
4716: =item load
4717:
4718: Respond with CPU load based on a computation upon /proc/loadavg.
4719:
4720: =item currentauth
4721:
4722: Reply with current authentication information (only over an
4723: encrypted channel).
4724:
4725: =item auth
4726:
4727: Only over an encrypted channel, reply as to whether a user's
4728: authentication information can be validated.
4729:
4730: =item passwd
4731:
4732: Allow for a password to be set.
4733:
4734: =item makeuser
4735:
4736: Make a user.
4737:
4738: =item passwd
4739:
4740: Allow for authentication mechanism and password to be changed.
4741:
4742: =item home
1.61 harris41 4743:
1.74 harris41 4744: Respond to a question "are you the home for a given user?"
4745:
4746: =item update
4747:
4748: Update contents of a subscribed resource.
4749:
4750: =item unsubscribe
4751:
4752: The server is unsubscribing from a resource.
4753:
4754: =item subscribe
4755:
4756: The server is subscribing to a resource.
4757:
4758: =item log
4759:
4760: Place in B<logs/lond.log>
4761:
4762: =item put
4763:
4764: stores hash in namespace
4765:
4766: =item rolesput
4767:
4768: put a role into a user's environment
4769:
4770: =item get
4771:
4772: returns hash with keys from array
4773: reference filled in from namespace
4774:
4775: =item eget
4776:
4777: returns hash with keys from array
4778: reference filled in from namesp (encrypts the return communication)
4779:
4780: =item rolesget
4781:
4782: get a role from a user's environment
4783:
4784: =item del
4785:
4786: deletes keys out of array from namespace
4787:
4788: =item keys
4789:
4790: returns namespace keys
4791:
4792: =item dump
4793:
4794: dumps the complete (or key matching regexp) namespace into a hash
4795:
4796: =item store
4797:
4798: stores hash permanently
4799: for this url; hashref needs to be given and should be a \%hashname; the
4800: remaining args aren't required and if they aren't passed or are '' they will
4801: be derived from the ENV
4802:
4803: =item restore
4804:
4805: returns a hash for a given url
4806:
4807: =item querysend
4808:
4809: Tells client about the lonsql process that has been launched in response
4810: to a sent query.
4811:
4812: =item queryreply
4813:
4814: Accept information from lonsql and make appropriate storage in temporary
4815: file space.
4816:
4817: =item idput
4818:
4819: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
4820: for each student, defined perhaps by the institutional Registrar.)
4821:
4822: =item idget
4823:
4824: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
4825: for each student, defined perhaps by the institutional Registrar.)
4826:
4827: =item tmpput
4828:
4829: Accept and store information in temporary space.
4830:
4831: =item tmpget
4832:
4833: Send along temporarily stored information.
4834:
4835: =item ls
4836:
4837: List part of a user's directory.
4838:
1.135 foxr 4839: =item pushtable
4840:
4841: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
4842: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
4843: must be restored manually in case of a problem with the new table file.
4844: pushtable requires that the request be encrypted and validated via
4845: ValidateManager. The form of the command is:
4846: enc:pushtable tablename <tablecontents> \n
4847: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
4848: cleartext newline.
4849:
1.74 harris41 4850: =item Hanging up (exit or init)
4851:
4852: What to do when a client tells the server that they (the client)
4853: are leaving the network.
4854:
4855: =item unknown command
4856:
4857: If B<lond> is sent an unknown command (not in the list above),
4858: it replys to the client "unknown_cmd".
1.135 foxr 4859:
1.74 harris41 4860:
4861: =item UNKNOWN CLIENT
4862:
4863: If the anti-spoofing algorithm cannot verify the client,
4864: the client is rejected (with a "refused" message sent
4865: to the client, and the connection is closed.
4866:
4867: =back
1.61 harris41 4868:
4869: =head1 PREREQUISITES
4870:
4871: IO::Socket
4872: IO::File
4873: Apache::File
4874: Symbol
4875: POSIX
4876: Crypt::IDEA
4877: LWP::UserAgent()
4878: GDBM_File
4879: Authen::Krb4
1.91 albertel 4880: Authen::Krb5
1.61 harris41 4881:
4882: =head1 COREQUISITES
4883:
4884: =head1 OSNAMES
4885:
4886: linux
4887:
4888: =head1 SCRIPT CATEGORIES
4889:
4890: Server/Process
4891:
4892: =cut
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to lond CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom