1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.142 2003/09/09 20:47:46 www Exp $
6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27: # http://www.lon-capa.org/
28: #
29: # 5/26/99,6/4,6/10,6/11,6/14,6/15,6/26,6/28,6/30,
30: # 7/8,7/9,7/10,7/12,7/17,7/19,9/21,
31: # 10/7,10/8,10/9,10/11,10/13,10/15,11/4,11/16,
32: # 12/7,12/15,01/06,01/11,01/12,01/14,2/8,
33: # 03/07,05/31 Gerd Kortemeyer
34: # 06/29,06/30,07/14,07/15,07/17,07/20,07/25,09/18 Gerd Kortemeyer
35: # 12/05,12/13,12/29 Gerd Kortemeyer
36: # YEAR=2001
37: # 02/12 Gerd Kortemeyer
38: # 03/24 Gerd Kortemeyer
39: # 05/11,05/28,08/30 Gerd Kortemeyer
40: # 11/26,11/27 Gerd Kortemeyer
41: # 12/22 Gerd Kortemeyer
42: # YEAR=2002
43: # 01/20/02,02/05 Gerd Kortemeyer
44: # 02/05 Guy Albertelli
45: # 02/12 Gerd Kortemeyer
46: # 02/19 Matthew Hall
47: # 02/25 Gerd Kortemeyer
48: # 01/xx/2003 Ron Fox.. Remove preforking. This makes the general daemon
49: # logic simpler (and there were problems maintaining the preforked
50: # population). Since the time averaged connection rate is close to zero
51: # because lonc's purpose is to maintain near continuous connnections,
52: # preforking is not really needed.
53: # 08/xx/2003 Ron Fox: Add management requests. Management requests
54: # will be validated via a call to ValidateManager. At present, this
55: # is done by simple host verification. In the future we can modify
56: # this function to do a certificate check.
57: # Management functions supported include:
58: # - pushing /home/httpd/lonTabs/hosts.tab
59: # - pushing /home/httpd/lonTabs/domain.tab
60: # 09/08/2003 Ron Fox: Told lond to take care of change logging so we
61: # don't have to remember it:
62: # $Log: lond,v $
63: # Revision 1.142 2003/09/09 20:47:46 www
64: # Permanently store chatroom entries in chatroom.log
65: #
66: # Revision 1.141 2003/09/08 10:32:07 foxr
67: # Added PushFile sub This sub oversees the push of a new configuration table file
68: # Currently supported files are:
69: # - hosts.tab (transaction pushfile:hosts:contents)
70: # - domain.tab (transaction pushfile:domain:contents)
71: #
72:
73:
74: use strict;
75: use lib '/home/httpd/lib/perl/';
76: use LONCAPA::Configuration;
77:
78: use IO::Socket;
79: use IO::File;
80: #use Apache::File;
81: use Symbol;
82: use POSIX;
83: use Crypt::IDEA;
84: use LWP::UserAgent();
85: use GDBM_File;
86: use Authen::Krb4;
87: use Authen::Krb5;
88: use lib '/home/httpd/lib/perl/';
89: use localauth;
90:
91: my $DEBUG = 0; # Non zero to enable debug log entries.
92:
93: my $status='';
94: my $lastlog='';
95:
96: my $VERSION='$Revision: 1.142 $'; #' stupid emacs
97: my $remoteVERSION;
98: my $currenthostid;
99: my $currentdomainid;
100:
101: my $client;
102: my $clientip;
103:
104: my $server;
105: my $thisserver;
106:
107: my %hostid;
108: my %hostdom;
109: my %hostip;
110: my %perlvar; # Will have the apache conf defined perl vars.
111:
112: #
113: # The array below are password error strings."
114: #
115: my $lastpwderror = 13; # Largest error number from lcpasswd.
116: my @passwderrors = ("ok",
117: "lcpasswd must be run as user 'www'",
118: "lcpasswd got incorrect number of arguments",
119: "lcpasswd did not get the right nubmer of input text lines",
120: "lcpasswd too many simultaneous pwd changes in progress",
121: "lcpasswd User does not exist.",
122: "lcpasswd Incorrect current passwd",
123: "lcpasswd Unable to su to root.",
124: "lcpasswd Cannot set new passwd.",
125: "lcpasswd Username has invalid characters",
126: "lcpasswd Invalid characters in password",
127: "11", "12",
128: "lcpasswd Password mismatch");
129:
130:
131: # The array below are lcuseradd error strings.:
132:
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 Unabel to mak ewww member of users's group",
141: "lcuseradd Unable to su to root",
142: "lcuseradd Unable to set password",
143: "lcuseradd Usrname has invbalid charcters",
144: "lcuseradd Password has an invalid character",
145: "lcuseradd User already exists",
146: "lcuseradd Could not add user.",
147: "lcuseradd Password mismatch");
148:
149:
150: #
151: # GetCertificate: Given a transaction that requires a certificate,
152: # this function will extract the certificate from the transaction
153: # request. Note that at this point, the only concept of a certificate
154: # is the hostname to which we are connected.
155: #
156: # Parameter:
157: # request - The request sent by our client (this parameterization may
158: # need to change when we really use a certificate granting
159: # authority.
160: #
161: sub GetCertificate {
162: my $request = shift;
163:
164: return $clientip;
165: }
166:
167:
168: #
169: # ValidManager: Determines if a given certificate represents a valid manager.
170: # in this primitive implementation, the 'certificate' is
171: # just the connecting loncapa client name. This is checked
172: # against a valid client list in the configuration.
173: #
174: #
175: sub ValidManager {
176: my $certificate = shift;
177:
178: my $hostentry = $hostid{$certificate};
179: if ($hostentry ne undef) {
180: &logthis('<font color="yellow">Authenticating manager'.
181: " $hostentry</font>");
182: return 1;
183: } else {
184: &logthis('<font color="red"> Failed manager authentication '.
185: "$certificate </font>");
186: }
187: }
188: #
189: # PushFile: Called to do an administrative push of a file.
190: # - Ensure the file being pushed is one we support.
191: # - Backup the old file to <filename.saved>
192: # - Separate the contents of the new file out from the
193: # rest of the request.
194: # - Write the new file.
195: # Parameter:
196: # Request - The entire user request. This consists of a : separated
197: # string pushfile:tablename:contents.
198: # NOTE: The contents may have :'s in it as well making things a bit
199: # more interesting... but not much.
200: # Returns:
201: # String to send to client ("ok" or "refused" if bad file).
202: #
203: sub PushFile {
204: my $request = shift;
205: my ($command, $filename, $contents) = split(":", $request, 3);
206:
207: # At this point in time, pushes for only the following tables are
208: # supported:
209: # hosts.tab ($filename eq host).
210: # domain.tab ($filename eq domain).
211: # Construct the destination filename or reject the request.
212: #
213: # lonManage is supposed to ensure this, however this session could be
214: # part of some elaborate spoof that managed somehow to authenticate.
215: #
216:
217: my $tablefile = $perlvar{'lonTabDir'}.'/'; # need to precede with dir.
218: if ($filename eq "host") {
219: $tablefile .= "hosts.tab";
220: } elsif ($filename eq "domain") {
221: $tablefile .= "domain.tab";
222: } else {
223: return "refused";
224: }
225: #
226: # >copy< the old table to the backup table
227: # don't rename in case system crashes/reboots etc. in the time
228: # window between a rename and write.
229: #
230: my $backupfile = $tablefile;
231: $backupfile =~ s/\.tab$/.old/;
232: # CopyFile($tablefile, $backupfile);
233: &logthis('<font color="green"> Pushfile: backed up '
234: .$tablefile." to $backupfile</font>");
235:
236: # Install the new file:
237:
238: # InstallFile($tablefile, $contents);
239:
240: # Indicate success:
241:
242: return "ok";
243:
244: }
245: #
246: # Convert an error return code from lcpasswd to a string value.
247: #
248: sub lcpasswdstrerror {
249: my $ErrorCode = shift;
250: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
251: return "lcpasswd Unrecognized error return value ".$ErrorCode;
252: } else {
253: return $passwderrors[$ErrorCode];
254: }
255: }
256:
257: #
258: # Convert an error return code from lcuseradd to a string value:
259: #
260: sub lcuseraddstrerror {
261: my $ErrorCode = shift;
262: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
263: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
264: } else {
265: return $adderrors[$ErrorCode];
266: }
267: }
268:
269: # grabs exception and records it to log before exiting
270: sub catchexception {
271: my ($error)=@_;
272: $SIG{'QUIT'}='DEFAULT';
273: $SIG{__DIE__}='DEFAULT';
274: &logthis("<font color=red>CRITICAL: "
275: ."ABNORMAL EXIT. Child $$ for server $thisserver died through "
276: ."a crash with this error msg->[$error]</font>");
277: &logthis('Famous last words: '.$status.' - '.$lastlog);
278: if ($client) { print $client "error: $error\n"; }
279: $server->close();
280: die($error);
281: }
282:
283: sub timeout {
284: &logthis("<font color=ref>CRITICAL: TIME OUT ".$$."</font>");
285: &catchexception('Timeout');
286: }
287: # -------------------------------- Set signal handlers to record abnormal exits
288:
289: $SIG{'QUIT'}=\&catchexception;
290: $SIG{__DIE__}=\&catchexception;
291:
292: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
293: &status("Read loncapa.conf and loncapa_apache.conf");
294: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
295: %perlvar=%{$perlvarref};
296: undef $perlvarref;
297:
298: # ----------------------------- Make sure this process is running from user=www
299: my $wwwid=getpwnam('www');
300: if ($wwwid!=$<) {
301: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
302: my $subj="LON: $currenthostid User ID mismatch";
303: system("echo 'User ID mismatch. lond must be run as user www.' |\
304: mailto $emailto -s '$subj' > /dev/null");
305: exit 1;
306: }
307:
308: # --------------------------------------------- Check if other instance running
309:
310: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
311:
312: if (-e $pidfile) {
313: my $lfh=IO::File->new("$pidfile");
314: my $pide=<$lfh>;
315: chomp($pide);
316: if (kill 0 => $pide) { die "already running"; }
317: }
318:
319: # ------------------------------------------------------------- Read hosts file
320:
321: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
322:
323: while (my $configline=<CONFIG>) {
324: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
325: chomp($ip); $ip=~s/\D+$//;
326: $hostid{$ip}=$id;
327: $hostdom{$id}=$domain;
328: $hostip{$id}=$ip;
329: if ($id eq $perlvar{'lonHostID'}) { $thisserver=$name; }
330: }
331: close(CONFIG);
332:
333: # establish SERVER socket, bind and listen.
334: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
335: Type => SOCK_STREAM,
336: Proto => 'tcp',
337: Reuse => 1,
338: Listen => 10 )
339: or die "making socket: $@\n";
340:
341: # --------------------------------------------------------- Do global variables
342:
343: # global variables
344:
345: my %children = (); # keys are current child process IDs
346: my $children = 0; # current number of children
347:
348: sub REAPER { # takes care of dead children
349: $SIG{CHLD} = \&REAPER;
350: my $pid = wait;
351: if (defined($children{$pid})) {
352: &logthis("Child $pid died");
353: $children --;
354: delete $children{$pid};
355: } else {
356: &logthis("Unknown Child $pid died");
357: }
358: }
359:
360: sub HUNTSMAN { # signal handler for SIGINT
361: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
362: kill 'INT' => keys %children;
363: &logthis("Free socket: ".shutdown($server,2)); # free up socket
364: my $execdir=$perlvar{'lonDaemons'};
365: unlink("$execdir/logs/lond.pid");
366: &logthis("<font color=red>CRITICAL: Shutting down</font>");
367: exit; # clean up with dignity
368: }
369:
370: sub HUPSMAN { # signal handler for SIGHUP
371: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
372: kill 'INT' => keys %children;
373: &logthis("Free socket: ".shutdown($server,2)); # free up socket
374: &logthis("<font color=red>CRITICAL: Restarting</font>");
375: my $execdir=$perlvar{'lonDaemons'};
376: unlink("$execdir/logs/lond.pid");
377: exec("$execdir/lond"); # here we go again
378: }
379:
380: sub checkchildren {
381: &initnewstatus();
382: &logstatus();
383: &logthis('Going to check on the children');
384: my $docdir=$perlvar{'lonDocRoot'};
385: foreach (sort keys %children) {
386: sleep 1;
387: unless (kill 'USR1' => $_) {
388: &logthis ('Child '.$_.' is dead');
389: &logstatus($$.' is dead');
390: }
391: }
392: sleep 5;
393: $SIG{ALRM} = sub { die "timeout" };
394: $SIG{__DIE__} = 'DEFAULT';
395: foreach (sort keys %children) {
396: unless (-e "$docdir/lon-status/londchld/$_.txt") {
397: eval {
398: alarm(300);
399: &logthis('Child '.$_.' did not respond');
400: kill 9 => $_;
401: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
402: #$subj="LON: $currenthostid killed lond process $_";
403: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
404: #$execdir=$perlvar{'lonDaemons'};
405: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
406: alarm(0);
407: }
408: }
409: }
410: $SIG{ALRM} = 'DEFAULT';
411: $SIG{__DIE__} = \&cathcexception;
412: }
413:
414: # --------------------------------------------------------------------- Logging
415:
416: sub logthis {
417: my $message=shift;
418: my $execdir=$perlvar{'lonDaemons'};
419: my $fh=IO::File->new(">>$execdir/logs/lond.log");
420: my $now=time;
421: my $local=localtime($now);
422: $lastlog=$local.': '.$message;
423: print $fh "$local ($$): $message\n";
424: }
425:
426: # ------------------------- Conditional log if $DEBUG true.
427: sub Debug {
428: my $message = shift;
429: if($DEBUG) {
430: &logthis($message);
431: }
432: }
433: # ------------------------------------------------------------------ Log status
434:
435: sub logstatus {
436: my $docdir=$perlvar{'lonDocRoot'};
437: {
438: my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");
439: print $fh $$."\t".$currenthostid."\t".$status."\t".$lastlog."\n";
440: $fh->close();
441: }
442: {
443: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
444: print $fh $status."\n".$lastlog."\n".time;
445: $fh->close();
446: }
447: }
448:
449: sub initnewstatus {
450: my $docdir=$perlvar{'lonDocRoot'};
451: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
452: my $now=time;
453: my $local=localtime($now);
454: print $fh "LOND status $local - parent $$\n\n";
455: opendir(DIR,"$docdir/lon-status/londchld");
456: while (my $filename=readdir(DIR)) {
457: unlink("$docdir/lon-status/londchld/$filename");
458: }
459: closedir(DIR);
460: }
461:
462: # -------------------------------------------------------------- Status setting
463:
464: sub status {
465: my $what=shift;
466: my $now=time;
467: my $local=localtime($now);
468: $status=$local.': '.$what;
469: $0='lond: '.$what.' '.$local;
470: }
471:
472: # -------------------------------------------------------- Escape Special Chars
473:
474: sub escape {
475: my $str=shift;
476: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
477: return $str;
478: }
479:
480: # ----------------------------------------------------- Un-Escape Special Chars
481:
482: sub unescape {
483: my $str=shift;
484: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
485: return $str;
486: }
487:
488: # ----------------------------------------------------------- Send USR1 to lonc
489:
490: sub reconlonc {
491: my $peerfile=shift;
492: &logthis("Trying to reconnect for $peerfile");
493: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
494: if (my $fh=IO::File->new("$loncfile")) {
495: my $loncpid=<$fh>;
496: chomp($loncpid);
497: if (kill 0 => $loncpid) {
498: &logthis("lonc at pid $loncpid responding, sending USR1");
499: kill USR1 => $loncpid;
500: } else {
501: &logthis(
502: "<font color=red>CRITICAL: "
503: ."lonc at pid $loncpid not responding, giving up</font>");
504: }
505: } else {
506: &logthis('<font color=red>CRITICAL: lonc not running, giving up</font>');
507: }
508: }
509:
510: # -------------------------------------------------- Non-critical communication
511:
512: sub subreply {
513: my ($cmd,$server)=@_;
514: my $peerfile="$perlvar{'lonSockDir'}/$server";
515: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
516: Type => SOCK_STREAM,
517: Timeout => 10)
518: or return "con_lost";
519: print $sclient "$cmd\n";
520: my $answer=<$sclient>;
521: chomp($answer);
522: if (!$answer) { $answer="con_lost"; }
523: return $answer;
524: }
525:
526: sub reply {
527: my ($cmd,$server)=@_;
528: my $answer;
529: if ($server ne $currenthostid) {
530: $answer=subreply($cmd,$server);
531: if ($answer eq 'con_lost') {
532: $answer=subreply("ping",$server);
533: if ($answer ne $server) {
534: &logthis("sub reply: answer != server answer is $answer, server is $server");
535: &reconlonc("$perlvar{'lonSockDir'}/$server");
536: }
537: $answer=subreply($cmd,$server);
538: }
539: } else {
540: $answer='self_reply';
541: }
542: return $answer;
543: }
544:
545: # -------------------------------------------------------------- Talk to lonsql
546:
547: sub sqlreply {
548: my ($cmd)=@_;
549: my $answer=subsqlreply($cmd);
550: if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }
551: return $answer;
552: }
553:
554: sub subsqlreply {
555: my ($cmd)=@_;
556: my $unixsock="mysqlsock";
557: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
558: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
559: Type => SOCK_STREAM,
560: Timeout => 10)
561: or return "con_lost";
562: print $sclient "$cmd\n";
563: my $answer=<$sclient>;
564: chomp($answer);
565: if (!$answer) { $answer="con_lost"; }
566: return $answer;
567: }
568:
569: # -------------------------------------------- Return path to profile directory
570:
571: sub propath {
572: my ($udom,$uname)=@_;
573: $udom=~s/\W//g;
574: $uname=~s/\W//g;
575: my $subdir=$uname.'__';
576: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
577: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
578: return $proname;
579: }
580:
581: # --------------------------------------- Is this the home server of an author?
582:
583: sub ishome {
584: my $author=shift;
585: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
586: my ($udom,$uname)=split(/\//,$author);
587: my $proname=propath($udom,$uname);
588: if (-e $proname) {
589: return 'owner';
590: } else {
591: return 'not_owner';
592: }
593: }
594:
595: # ======================================================= Continue main program
596: # ---------------------------------------------------- Fork once and dissociate
597:
598: my $fpid=fork;
599: exit if $fpid;
600: die "Couldn't fork: $!" unless defined ($fpid);
601:
602: POSIX::setsid() or die "Can't start new session: $!";
603:
604: # ------------------------------------------------------- Write our PID on disk
605:
606: my $execdir=$perlvar{'lonDaemons'};
607: open (PIDSAVE,">$execdir/logs/lond.pid");
608: print PIDSAVE "$$\n";
609: close(PIDSAVE);
610: &logthis("<font color=red>CRITICAL: ---------- Starting ----------</font>");
611: &status('Starting');
612:
613:
614:
615: # ----------------------------------------------------- Install signal handlers
616:
617:
618: $SIG{CHLD} = \&REAPER;
619: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
620: $SIG{HUP} = \&HUPSMAN;
621: $SIG{USR1} = \&checkchildren;
622:
623:
624:
625: # --------------------------------------------------------------
626: # Accept connections. When a connection comes in, it is validated
627: # and if good, a child process is created to process transactions
628: # along the connection.
629:
630: while (1) {
631: $client = $server->accept() or next;
632: make_new_child($client);
633: }
634:
635: sub make_new_child {
636: my $pid;
637: my $cipher;
638: my $sigset;
639:
640: $client = shift;
641: &logthis("Attempting to start child");
642: # block signal for fork
643: $sigset = POSIX::SigSet->new(SIGINT);
644: sigprocmask(SIG_BLOCK, $sigset)
645: or die "Can't block SIGINT for fork: $!\n";
646:
647: die "fork: $!" unless defined ($pid = fork);
648:
649: if ($pid) {
650: # Parent records the child's birth and returns.
651: sigprocmask(SIG_UNBLOCK, $sigset)
652: or die "Can't unblock SIGINT for fork: $!\n";
653: $children{$pid} = 1;
654: $children++;
655: &status('Started child '.$pid);
656: return;
657: } else {
658: # Child can *not* return from this subroutine.
659: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
660: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
661: #don't get intercepted
662: $SIG{USR1}= \&logstatus;
663: $SIG{ALRM}= \&timeout;
664: $lastlog='Forked ';
665: $status='Forked';
666:
667: # unblock signals
668: sigprocmask(SIG_UNBLOCK, $sigset)
669: or die "Can't unblock SIGINT for fork: $!\n";
670:
671: my $tmpsnum=0;
672: #---------------------------------------------------- kerberos 5 initialization
673: &Authen::Krb5::init_context();
674: &Authen::Krb5::init_ets();
675:
676: &status('Accepted connection');
677: # =============================================================================
678: # do something with the connection
679: # -----------------------------------------------------------------------------
680: $client->sockopt(SO_KEEPALIVE, 1);# Enable monitoring of
681: # connection liveness.
682: # see if we know client and check for spoof IP by challenge
683: my $caller = getpeername($client);
684: my ($port,$iaddr)=unpack_sockaddr_in($caller);
685: $clientip=inet_ntoa($iaddr);
686: my $clientrec=($hostid{$clientip} ne undef);
687: &logthis(
688: "<font color=yellow>INFO: Connection, $clientip ($hostid{$clientip})</font>"
689: );
690: &status("Connecting $clientip ($hostid{$clientip})");
691: my $clientok;
692: if ($clientrec) {
693: &status("Waiting for init from $clientip ($hostid{$clientip})");
694: my $remotereq=<$client>;
695: $remotereq=~s/[^\w:]//g;
696: if ($remotereq =~ /^init/) {
697: &sethost("sethost:$perlvar{'lonHostID'}");
698: my $challenge="$$".time;
699: print $client "$challenge\n";
700: &status(
701: "Waiting for challenge reply from $clientip ($hostid{$clientip})");
702: $remotereq=<$client>;
703: $remotereq=~s/\W//g;
704: if ($challenge eq $remotereq) {
705: $clientok=1;
706: print $client "ok\n";
707: } else {
708: &logthis(
709: "<font color=blue>WARNING: $clientip did not reply challenge</font>");
710: &status('No challenge reply '.$clientip);
711: }
712: } else {
713: &logthis(
714: "<font color=blue>WARNING: "
715: ."$clientip failed to initialize: >$remotereq< </font>");
716: &status('No init '.$clientip);
717: }
718: } else {
719: &logthis(
720: "<font color=blue>WARNING: Unknown client $clientip</font>");
721: &status('Hung up on '.$clientip);
722: }
723: if ($clientok) {
724: # ---------------- New known client connecting, could mean machine online again
725:
726: foreach my $id (keys(%hostip)) {
727: if ($hostip{$id} ne $clientip ||
728: $hostip{$currenthostid} eq $clientip) {
729: # no need to try to do recon's to myself
730: next;
731: }
732: &reconlonc("$perlvar{'lonSockDir'}/$id");
733: }
734: &logthis("<font color=green>Established connection: $hostid{$clientip}</font>");
735: &status('Will listen to '.$hostid{$clientip});
736: # ------------------------------------------------------------ Process requests
737: while (my $userinput=<$client>) {
738: chomp($userinput);
739: Debug("Request = $userinput\n");
740: &status('Processing '.$hostid{$clientip}.': '.$userinput);
741: my $wasenc=0;
742: alarm(120);
743: # ------------------------------------------------------------ See if encrypted
744: if ($userinput =~ /^enc/) {
745: if ($cipher) {
746: my ($cmd,$cmdlength,$encinput)=split(/:/,$userinput);
747: $userinput='';
748: for (my $encidx=0;$encidx<length($encinput);$encidx+=16) {
749: $userinput.=
750: $cipher->decrypt(
751: pack("H16",substr($encinput,$encidx,16))
752: );
753: }
754: $userinput=substr($userinput,0,$cmdlength);
755: $wasenc=1;
756: }
757: }
758:
759: # ------------------------------------------------------------- Normal commands
760: # ------------------------------------------------------------------------ ping
761: if ($userinput =~ /^ping/) {
762: print $client "$currenthostid\n";
763: # ------------------------------------------------------------------------ pong
764: }elsif ($userinput =~ /^pong/) {
765: my $reply=&reply("ping",$hostid{$clientip});
766: print $client "$currenthostid:$reply\n";
767: # ------------------------------------------------------------------------ ekey
768: } elsif ($userinput =~ /^ekey/) {
769: my $buildkey=time.$$.int(rand 100000);
770: $buildkey=~tr/1-6/A-F/;
771: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
772: my $key=$currenthostid.$hostid{$clientip};
773: $key=~tr/a-z/A-Z/;
774: $key=~tr/G-P/0-9/;
775: $key=~tr/Q-Z/0-9/;
776: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
777: $key=substr($key,0,32);
778: my $cipherkey=pack("H32",$key);
779: $cipher=new IDEA $cipherkey;
780: print $client "$buildkey\n";
781: # ------------------------------------------------------------------------ load
782: } elsif ($userinput =~ /^load/) {
783: my $loadavg;
784: {
785: my $loadfile=IO::File->new('/proc/loadavg');
786: $loadavg=<$loadfile>;
787: }
788: $loadavg =~ s/\s.*//g;
789: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
790: print $client "$loadpercent\n";
791: # -------------------------------------------------------------------- userload
792: } elsif ($userinput =~ /^userload/) {
793: my $userloadpercent=&userload();
794: print $client "$userloadpercent\n";
795:
796: #
797: # Transactions requiring encryption:
798: #
799: # ----------------------------------------------------------------- currentauth
800: } elsif ($userinput =~ /^currentauth/) {
801: if ($wasenc==1) {
802: my ($cmd,$udom,$uname)=split(/:/,$userinput);
803: my $result = GetAuthType($udom, $uname);
804: if($result eq "nouser") {
805: print $client "unknown_user\n";
806: }
807: else {
808: print $client "$result\n"
809: }
810: } else {
811: print $client "refused\n";
812: }
813: #--------------------------------------------------------------------- pushfile
814: } elsif($userinput =~ /^pushfile/) {
815: if($wasenc == 1) {
816: my $cert = GetCertificate($userinput);
817: if(ValidManager($cert)) {
818: my $reply = PushFile($userinput);
819: print $client "$reply\n";
820: } else {
821: print $client "refused\n";
822: }
823: } else {
824: print $client "refused\n";
825: }
826: #--------------------------------------------------------------------- reinit
827: } elsif($userinput =~ /^reinit/) {
828: if ($wasenc == 1) {
829: my $cert = GetCertificate($userinput);
830: if(ValidManager($cert)) {
831: print $client "ok\n";
832: } else {
833: print $client "refused\n";
834: }
835: } else {
836: print $client "refused\n";
837: }
838: # ------------------------------------------------------------------------ auth
839: } elsif ($userinput =~ /^auth/) {
840: if ($wasenc==1) {
841: my ($cmd,$udom,$uname,$upass)=split(/:/,$userinput);
842: chomp($upass);
843: $upass=unescape($upass);
844: my $proname=propath($udom,$uname);
845: my $passfilename="$proname/passwd";
846: if (-e $passfilename) {
847: my $pf = IO::File->new($passfilename);
848: my $realpasswd=<$pf>;
849: chomp($realpasswd);
850: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
851: my $pwdcorrect=0;
852: if ($howpwd eq 'internal') {
853: &Debug("Internal auth");
854: $pwdcorrect=
855: (crypt($upass,$contentpwd) eq $contentpwd);
856: } elsif ($howpwd eq 'unix') {
857: &Debug("Unix auth");
858: if((getpwnam($uname))[1] eq "") { #no such user!
859: $pwdcorrect = 0;
860: } else {
861: $contentpwd=(getpwnam($uname))[1];
862: my $pwauth_path="/usr/local/sbin/pwauth";
863: unless ($contentpwd eq 'x') {
864: $pwdcorrect=
865: (crypt($upass,$contentpwd) eq
866: $contentpwd);
867: }
868:
869: elsif (-e $pwauth_path) {
870: open PWAUTH, "|$pwauth_path" or
871: die "Cannot invoke authentication";
872: print PWAUTH "$uname\n$upass\n";
873: close PWAUTH;
874: $pwdcorrect=!$?;
875: }
876: }
877: } elsif ($howpwd eq 'krb4') {
878: my $null=pack("C",0);
879: unless ($upass=~/$null/) {
880: my $krb4_error = &Authen::Krb4::get_pw_in_tkt
881: ($uname,"",$contentpwd,'krbtgt',
882: $contentpwd,1,$upass);
883: if (!$krb4_error) {
884: $pwdcorrect = 1;
885: } else {
886: $pwdcorrect=0;
887: # log error if it is not a bad password
888: if ($krb4_error != 62) {
889: &logthis('krb4:'.$uname.','.$contentpwd.','.
890: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
891: }
892: }
893: }
894: } elsif ($howpwd eq 'krb5') {
895: my $null=pack("C",0);
896: unless ($upass=~/$null/) {
897: my $krbclient=&Authen::Krb5::parse_name($uname.'@'.$contentpwd);
898: my $krbservice="krbtgt/".$contentpwd."\@".$contentpwd;
899: my $krbserver=&Authen::Krb5::parse_name($krbservice);
900: my $credentials=&Authen::Krb5::cc_default();
901: $credentials->initialize($krbclient);
902: my $krbreturn =
903: &Authen::Krb5::get_in_tkt_with_password(
904: $krbclient,$krbserver,$upass,$credentials);
905: # unless ($krbreturn) {
906: # &logthis("Krb5 Error: ".
907: # &Authen::Krb5::error());
908: # }
909: $pwdcorrect = ($krbreturn == 1);
910: } else { $pwdcorrect=0; }
911: } elsif ($howpwd eq 'localauth') {
912: $pwdcorrect=&localauth::localauth($uname,$upass,
913: $contentpwd);
914: }
915: if ($pwdcorrect) {
916: print $client "authorized\n";
917: } else {
918: print $client "non_authorized\n";
919: }
920: } else {
921: print $client "unknown_user\n";
922: }
923: } else {
924: print $client "refused\n";
925: }
926: # ---------------------------------------------------------------------- passwd
927: } elsif ($userinput =~ /^passwd/) {
928: if ($wasenc==1) {
929: my
930: ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
931: chomp($npass);
932: $upass=&unescape($upass);
933: $npass=&unescape($npass);
934: &Debug("Trying to change password for $uname");
935: my $proname=propath($udom,$uname);
936: my $passfilename="$proname/passwd";
937: if (-e $passfilename) {
938: my $realpasswd;
939: { my $pf = IO::File->new($passfilename);
940: $realpasswd=<$pf>; }
941: chomp($realpasswd);
942: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
943: if ($howpwd eq 'internal') {
944: &Debug("internal auth");
945: if (crypt($upass,$contentpwd) eq $contentpwd) {
946: my $salt=time;
947: $salt=substr($salt,6,2);
948: my $ncpass=crypt($npass,$salt);
949: {
950: my $pf;
951: if ($pf = IO::File->new(">$passfilename")) {
952: print $pf "internal:$ncpass\n";
953: &logthis("Result of password change for $uname: pwchange_success");
954: print $client "ok\n";
955: } else {
956: &logthis("Unable to open $uname passwd to change password");
957: print $client "non_authorized\n";
958: }
959: }
960:
961: } else {
962: print $client "non_authorized\n";
963: }
964: } elsif ($howpwd eq 'unix') {
965: # Unix means we have to access /etc/password
966: # one way or another.
967: # First: Make sure the current password is
968: # correct
969: &Debug("auth is unix");
970: $contentpwd=(getpwnam($uname))[1];
971: my $pwdcorrect = "0";
972: my $pwauth_path="/usr/local/sbin/pwauth";
973: unless ($contentpwd eq 'x') {
974: $pwdcorrect=
975: (crypt($upass,$contentpwd) eq $contentpwd);
976: } elsif (-e $pwauth_path) {
977: open PWAUTH, "|$pwauth_path" or
978: die "Cannot invoke authentication";
979: print PWAUTH "$uname\n$upass\n";
980: close PWAUTH;
981: &Debug("exited pwauth with $? ($uname,$upass) ");
982: $pwdcorrect=($? == 0);
983: }
984: if ($pwdcorrect) {
985: my $execdir=$perlvar{'lonDaemons'};
986: &Debug("Opening lcpasswd pipeline");
987: my $pf = IO::File->new("|$execdir/lcpasswd > $perlvar{'lonDaemons'}/logs/lcpasswd.log");
988: print $pf "$uname\n$npass\n$npass\n";
989: close $pf;
990: my $err = $?;
991: my $result = ($err>0 ? 'pwchange_failure'
992: : 'ok');
993: &logthis("Result of password change for $uname: ".
994: &lcpasswdstrerror($?));
995: print $client "$result\n";
996: } else {
997: print $client "non_authorized\n";
998: }
999: } else {
1000: print $client "auth_mode_error\n";
1001: }
1002: } else {
1003: print $client "unknown_user\n";
1004: }
1005: } else {
1006: print $client "refused\n";
1007: }
1008: # -------------------------------------------------------------------- makeuser
1009: } elsif ($userinput =~ /^makeuser/) {
1010: &Debug("Make user received");
1011: my $oldumask=umask(0077);
1012: if ($wasenc==1) {
1013: my
1014: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
1015: &Debug("cmd =".$cmd." $udom =".$udom.
1016: " uname=".$uname);
1017: chomp($npass);
1018: $npass=&unescape($npass);
1019: my $proname=propath($udom,$uname);
1020: my $passfilename="$proname/passwd";
1021: &Debug("Password file created will be:".
1022: $passfilename);
1023: if (-e $passfilename) {
1024: print $client "already_exists\n";
1025: } elsif ($udom ne $currentdomainid) {
1026: print $client "not_right_domain\n";
1027: } else {
1028: my @fpparts=split(/\//,$proname);
1029: my $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
1030: my $fperror='';
1031: for (my $i=3;$i<=$#fpparts;$i++) {
1032: $fpnow.='/'.$fpparts[$i];
1033: unless (-e $fpnow) {
1034: unless (mkdir($fpnow,0777)) {
1035: $fperror="error: ".($!+0)
1036: ." mkdir failed while attempting "
1037: ."makeuser\n";
1038: }
1039: }
1040: }
1041: unless ($fperror) {
1042: my $result=&make_passwd_file($uname, $umode,$npass,
1043: $passfilename);
1044: print $client $result;
1045: } else {
1046: print $client "$fperror\n";
1047: }
1048: }
1049: } else {
1050: print $client "refused\n";
1051: }
1052: umask($oldumask);
1053: # -------------------------------------------------------------- changeuserauth
1054: } elsif ($userinput =~ /^changeuserauth/) {
1055: &Debug("Changing authorization");
1056: if ($wasenc==1) {
1057: my
1058: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
1059: chomp($npass);
1060: &Debug("cmd = ".$cmd." domain= ".$udom.
1061: "uname =".$uname." umode= ".$umode);
1062: $npass=&unescape($npass);
1063: my $proname=&propath($udom,$uname);
1064: my $passfilename="$proname/passwd";
1065: if ($udom ne $currentdomainid) {
1066: print $client "not_right_domain\n";
1067: } else {
1068: my $result=&make_passwd_file($uname, $umode,$npass,
1069: $passfilename);
1070: print $client $result;
1071: }
1072: } else {
1073: print $client "refused\n";
1074: }
1075: # ------------------------------------------------------------------------ home
1076: } elsif ($userinput =~ /^home/) {
1077: my ($cmd,$udom,$uname)=split(/:/,$userinput);
1078: chomp($uname);
1079: my $proname=propath($udom,$uname);
1080: if (-e $proname) {
1081: print $client "found\n";
1082: } else {
1083: print $client "not_found\n";
1084: }
1085: # ---------------------------------------------------------------------- update
1086: } elsif ($userinput =~ /^update/) {
1087: my ($cmd,$fname)=split(/:/,$userinput);
1088: my $ownership=ishome($fname);
1089: if ($ownership eq 'not_owner') {
1090: if (-e $fname) {
1091: my ($dev,$ino,$mode,$nlink,
1092: $uid,$gid,$rdev,$size,
1093: $atime,$mtime,$ctime,
1094: $blksize,$blocks)=stat($fname);
1095: my $now=time;
1096: my $since=$now-$atime;
1097: if ($since>$perlvar{'lonExpire'}) {
1098: my $reply=
1099: &reply("unsub:$fname","$hostid{$clientip}");
1100: unlink("$fname");
1101: } else {
1102: my $transname="$fname.in.transfer";
1103: my $remoteurl=
1104: reply("sub:$fname","$hostid{$clientip}");
1105: my $response;
1106: {
1107: my $ua=new LWP::UserAgent;
1108: my $request=new HTTP::Request('GET',"$remoteurl");
1109: $response=$ua->request($request,$transname);
1110: }
1111: if ($response->is_error()) {
1112: unlink($transname);
1113: my $message=$response->status_line;
1114: &logthis(
1115: "LWP GET: $message for $fname ($remoteurl)");
1116: } else {
1117: if ($remoteurl!~/\.meta$/) {
1118: my $ua=new LWP::UserAgent;
1119: my $mrequest=
1120: new HTTP::Request('GET',$remoteurl.'.meta');
1121: my $mresponse=
1122: $ua->request($mrequest,$fname.'.meta');
1123: if ($mresponse->is_error()) {
1124: unlink($fname.'.meta');
1125: }
1126: }
1127: rename($transname,$fname);
1128: }
1129: }
1130: print $client "ok\n";
1131: } else {
1132: print $client "not_found\n";
1133: }
1134: } else {
1135: print $client "rejected\n";
1136: }
1137: # -------------------------------------- fetch a user file from a remote server
1138: } elsif ($userinput =~ /^fetchuserfile/) {
1139: my ($cmd,$fname)=split(/:/,$userinput);
1140: my ($udom,$uname,$ufile)=split(/\//,$fname);
1141: my $udir=propath($udom,$uname).'/userfiles';
1142: unless (-e $udir) { mkdir($udir,0770); }
1143: if (-e $udir) {
1144: $ufile=~s/^[\.\~]+//;
1145: $ufile=~s/\///g;
1146: my $transname=$udir.'/'.$ufile;
1147: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
1148: my $response;
1149: {
1150: my $ua=new LWP::UserAgent;
1151: my $request=new HTTP::Request('GET',"$remoteurl");
1152: $response=$ua->request($request,$transname);
1153: }
1154: if ($response->is_error()) {
1155: unlink($transname);
1156: my $message=$response->status_line;
1157: &logthis(
1158: "LWP GET: $message for $fname ($remoteurl)");
1159: print $client "failed\n";
1160: } else {
1161: print $client "ok\n";
1162: }
1163: } else {
1164: print $client "not_home\n";
1165: }
1166: # ------------------------------------------ authenticate access to a user file
1167: } elsif ($userinput =~ /^tokenauthuserfile/) {
1168: my ($cmd,$fname,$session)=split(/:/,$userinput);
1169: chomp($session);
1170: my $reply='non_auth';
1171: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
1172: $session.'.id')) {
1173: while (my $line=<ENVIN>) {
1174: if ($line=~/userfile\.$fname\=/) { $reply='ok'; }
1175: }
1176: close(ENVIN);
1177: print $client $reply."\n";
1178: } else {
1179: print $client "invalid_token\n";
1180: }
1181: # ----------------------------------------------------------------- unsubscribe
1182: } elsif ($userinput =~ /^unsub/) {
1183: my ($cmd,$fname)=split(/:/,$userinput);
1184: if (-e $fname) {
1185: print $client &unsub($client,$fname,$clientip);
1186: } else {
1187: print $client "not_found\n";
1188: }
1189: # ------------------------------------------------------------------- subscribe
1190: } elsif ($userinput =~ /^sub/) {
1191: print $client &subscribe($userinput,$clientip);
1192: # ------------------------------------------------------------- current version
1193: } elsif ($userinput =~ /^currentversion/) {
1194: my ($cmd,$fname)=split(/:/,$userinput);
1195: print $client ¤tversion($fname)."\n";
1196: # ------------------------------------------------------------------------- log
1197: } elsif ($userinput =~ /^log/) {
1198: my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
1199: chomp($what);
1200: my $proname=propath($udom,$uname);
1201: my $now=time;
1202: {
1203: my $hfh;
1204: if ($hfh=IO::File->new(">>$proname/activity.log")) {
1205: print $hfh "$now:$hostid{$clientip}:$what\n";
1206: print $client "ok\n";
1207: } else {
1208: print $client "error: ".($!+0)
1209: ." IO::File->new Failed "
1210: ."while attempting log\n";
1211: }
1212: }
1213: # ------------------------------------------------------------------------- put
1214: } elsif ($userinput =~ /^put/) {
1215: my ($cmd,$udom,$uname,$namespace,$what)
1216: =split(/:/,$userinput);
1217: $namespace=~s/\//\_/g;
1218: $namespace=~s/\W//g;
1219: if ($namespace ne 'roles') {
1220: chomp($what);
1221: my $proname=propath($udom,$uname);
1222: my $now=time;
1223: unless ($namespace=~/^nohist\_/) {
1224: my $hfh;
1225: if (
1226: $hfh=IO::File->new(">>$proname/$namespace.hist")
1227: ) { print $hfh "P:$now:$what\n"; }
1228: }
1229: my @pairs=split(/\&/,$what);
1230: my %hash;
1231: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1232: foreach my $pair (@pairs) {
1233: my ($key,$value)=split(/=/,$pair);
1234: $hash{$key}=$value;
1235: }
1236: if (untie(%hash)) {
1237: print $client "ok\n";
1238: } else {
1239: print $client "error: ".($!+0)
1240: ." untie(GDBM) failed ".
1241: "while attempting put\n";
1242: }
1243: } else {
1244: print $client "error: ".($!)
1245: ." tie(GDBM) Failed ".
1246: "while attempting put\n";
1247: }
1248: } else {
1249: print $client "refused\n";
1250: }
1251: # -------------------------------------------------------------------- rolesput
1252: } elsif ($userinput =~ /^rolesput/) {
1253: &Debug("rolesput");
1254: if ($wasenc==1) {
1255: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
1256: =split(/:/,$userinput);
1257: &Debug("cmd = ".$cmd." exedom= ".$exedom.
1258: "user = ".$exeuser." udom=".$udom.
1259: "what = ".$what);
1260: my $namespace='roles';
1261: chomp($what);
1262: my $proname=propath($udom,$uname);
1263: my $now=time;
1264: {
1265: my $hfh;
1266: if (
1267: $hfh=IO::File->new(">>$proname/$namespace.hist")
1268: ) {
1269: print $hfh "P:$now:$exedom:$exeuser:$what\n";
1270: }
1271: }
1272: my @pairs=split(/\&/,$what);
1273: my %hash;
1274: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1275: foreach my $pair (@pairs) {
1276: my ($key,$value)=split(/=/,$pair);
1277: &ManagePermissions($key, $udom, $uname,
1278: &GetAuthType( $udom,
1279: $uname));
1280: $hash{$key}=$value;
1281: }
1282: if (untie(%hash)) {
1283: print $client "ok\n";
1284: } else {
1285: print $client "error: ".($!+0)
1286: ." untie(GDBM) Failed ".
1287: "while attempting rolesput\n";
1288: }
1289: } else {
1290: print $client "error: ".($!+0)
1291: ." tie(GDBM) Failed ".
1292: "while attempting rolesput\n";
1293: }
1294: } else {
1295: print $client "refused\n";
1296: }
1297: # -------------------------------------------------------------------- rolesdel
1298: } elsif ($userinput =~ /^rolesdel/) {
1299: &Debug("rolesdel");
1300: if ($wasenc==1) {
1301: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
1302: =split(/:/,$userinput);
1303: &Debug("cmd = ".$cmd." exedom= ".$exedom.
1304: "user = ".$exeuser." udom=".$udom.
1305: "what = ".$what);
1306: my $namespace='roles';
1307: chomp($what);
1308: my $proname=propath($udom,$uname);
1309: my $now=time;
1310: {
1311: my $hfh;
1312: if (
1313: $hfh=IO::File->new(">>$proname/$namespace.hist")
1314: ) {
1315: print $hfh "D:$now:$exedom:$exeuser:$what\n";
1316: }
1317: }
1318: my @rolekeys=split(/\&/,$what);
1319: my %hash;
1320: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1321: foreach my $key (@rolekeys) {
1322: delete $hash{$key};
1323: }
1324: if (untie(%hash)) {
1325: print $client "ok\n";
1326: } else {
1327: print $client "error: ".($!+0)
1328: ." untie(GDBM) Failed ".
1329: "while attempting rolesdel\n";
1330: }
1331: } else {
1332: print $client "error: ".($!+0)
1333: ." tie(GDBM) Failed ".
1334: "while attempting rolesdel\n";
1335: }
1336: } else {
1337: print $client "refused\n";
1338: }
1339: # ------------------------------------------------------------------------- get
1340: } elsif ($userinput =~ /^get/) {
1341: my ($cmd,$udom,$uname,$namespace,$what)
1342: =split(/:/,$userinput);
1343: $namespace=~s/\//\_/g;
1344: $namespace=~s/\W//g;
1345: chomp($what);
1346: my @queries=split(/\&/,$what);
1347: my $proname=propath($udom,$uname);
1348: my $qresult='';
1349: my %hash;
1350: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1351: for (my $i=0;$i<=$#queries;$i++) {
1352: $qresult.="$hash{$queries[$i]}&";
1353: }
1354: if (untie(%hash)) {
1355: $qresult=~s/\&$//;
1356: print $client "$qresult\n";
1357: } else {
1358: print $client "error: ".($!+0)
1359: ." untie(GDBM) Failed ".
1360: "while attempting get\n";
1361: }
1362: } else {
1363: if ($!+0 == 2) {
1364: print $client "error:No such file or ".
1365: "GDBM reported bad block error\n";
1366: } else {
1367: print $client "error: ".($!+0)
1368: ." tie(GDBM) Failed ".
1369: "while attempting get\n";
1370: }
1371: }
1372: # ------------------------------------------------------------------------ eget
1373: } elsif ($userinput =~ /^eget/) {
1374: my ($cmd,$udom,$uname,$namespace,$what)
1375: =split(/:/,$userinput);
1376: $namespace=~s/\//\_/g;
1377: $namespace=~s/\W//g;
1378: chomp($what);
1379: my @queries=split(/\&/,$what);
1380: my $proname=propath($udom,$uname);
1381: my $qresult='';
1382: my %hash;
1383: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1384: for (my $i=0;$i<=$#queries;$i++) {
1385: $qresult.="$hash{$queries[$i]}&";
1386: }
1387: if (untie(%hash)) {
1388: $qresult=~s/\&$//;
1389: if ($cipher) {
1390: my $cmdlength=length($qresult);
1391: $qresult.=" ";
1392: my $encqresult='';
1393: for
1394: (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
1395: $encqresult.=
1396: unpack("H16",
1397: $cipher->encrypt(substr($qresult,$encidx,8)));
1398: }
1399: print $client "enc:$cmdlength:$encqresult\n";
1400: } else {
1401: print $client "error:no_key\n";
1402: }
1403: } else {
1404: print $client "error: ".($!+0)
1405: ." untie(GDBM) Failed ".
1406: "while attempting eget\n";
1407: }
1408: } else {
1409: print $client "error: ".($!+0)
1410: ." tie(GDBM) Failed ".
1411: "while attempting eget\n";
1412: }
1413: # ------------------------------------------------------------------------- del
1414: } elsif ($userinput =~ /^del/) {
1415: my ($cmd,$udom,$uname,$namespace,$what)
1416: =split(/:/,$userinput);
1417: $namespace=~s/\//\_/g;
1418: $namespace=~s/\W//g;
1419: chomp($what);
1420: my $proname=propath($udom,$uname);
1421: my $now=time;
1422: unless ($namespace=~/^nohist\_/) {
1423: my $hfh;
1424: if (
1425: $hfh=IO::File->new(">>$proname/$namespace.hist")
1426: ) { print $hfh "D:$now:$what\n"; }
1427: }
1428: my @keys=split(/\&/,$what);
1429: my %hash;
1430: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1431: foreach my $key (@keys) {
1432: delete($hash{$key});
1433: }
1434: if (untie(%hash)) {
1435: print $client "ok\n";
1436: } else {
1437: print $client "error: ".($!+0)
1438: ." untie(GDBM) Failed ".
1439: "while attempting del\n";
1440: }
1441: } else {
1442: print $client "error: ".($!+0)
1443: ." tie(GDBM) Failed ".
1444: "while attempting del\n";
1445: }
1446: # ------------------------------------------------------------------------ keys
1447: } elsif ($userinput =~ /^keys/) {
1448: my ($cmd,$udom,$uname,$namespace)
1449: =split(/:/,$userinput);
1450: $namespace=~s/\//\_/g;
1451: $namespace=~s/\W//g;
1452: my $proname=propath($udom,$uname);
1453: my $qresult='';
1454: my %hash;
1455: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1456: foreach my $key (keys %hash) {
1457: $qresult.="$key&";
1458: }
1459: if (untie(%hash)) {
1460: $qresult=~s/\&$//;
1461: print $client "$qresult\n";
1462: } else {
1463: print $client "error: ".($!+0)
1464: ." untie(GDBM) Failed ".
1465: "while attempting keys\n";
1466: }
1467: } else {
1468: print $client "error: ".($!+0)
1469: ." tie(GDBM) Failed ".
1470: "while attempting keys\n";
1471: }
1472: # ----------------------------------------------------------------- dumpcurrent
1473: } elsif ($userinput =~ /^currentdump/) {
1474: my ($cmd,$udom,$uname,$namespace)
1475: =split(/:/,$userinput);
1476: $namespace=~s/\//\_/g;
1477: $namespace=~s/\W//g;
1478: my $qresult='';
1479: my $proname=propath($udom,$uname);
1480: my %hash;
1481: if (tie(%hash,'GDBM_File',
1482: "$proname/$namespace.db",
1483: &GDBM_READER(),0640)) {
1484: # Structure of %data:
1485: # $data{$symb}->{$parameter}=$value;
1486: # $data{$symb}->{'v.'.$parameter}=$version;
1487: # since $parameter will be unescaped, we do not
1488: # have to worry about silly parameter names...
1489: my %data = ();
1490: while (my ($key,$value) = each(%hash)) {
1491: my ($v,$symb,$param) = split(/:/,$key);
1492: next if ($v eq 'version' || $symb eq 'keys');
1493: next if (exists($data{$symb}) &&
1494: exists($data{$symb}->{$param}) &&
1495: $data{$symb}->{'v.'.$param} > $v);
1496: $data{$symb}->{$param}=$value;
1497: $data{$symb}->{'v.'.$param}=$v;
1498: }
1499: if (untie(%hash)) {
1500: while (my ($symb,$param_hash) = each(%data)) {
1501: while(my ($param,$value) = each (%$param_hash)){
1502: next if ($param =~ /^v\./);
1503: $qresult.=$symb.':'.$param.'='.$value.'&';
1504: }
1505: }
1506: chop($qresult);
1507: print $client "$qresult\n";
1508: } else {
1509: print $client "error: ".($!+0)
1510: ." untie(GDBM) Failed ".
1511: "while attempting currentdump\n";
1512: }
1513: } else {
1514: print $client "error: ".($!+0)
1515: ." tie(GDBM) Failed ".
1516: "while attempting currentdump\n";
1517: }
1518: # ------------------------------------------------------------------------ dump
1519: } elsif ($userinput =~ /^dump/) {
1520: my ($cmd,$udom,$uname,$namespace,$regexp)
1521: =split(/:/,$userinput);
1522: $namespace=~s/\//\_/g;
1523: $namespace=~s/\W//g;
1524: if (defined($regexp)) {
1525: $regexp=&unescape($regexp);
1526: } else {
1527: $regexp='.';
1528: }
1529: my $qresult='';
1530: my $proname=propath($udom,$uname);
1531: my %hash;
1532: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1533: study($regexp);
1534: while (my ($key,$value) = each(%hash)) {
1535: if ($regexp eq '.') {
1536: $qresult.=$key.'='.$value.'&';
1537: } else {
1538: my $unescapeKey = &unescape($key);
1539: if (eval('$unescapeKey=~/$regexp/')) {
1540: $qresult.="$key=$value&";
1541: }
1542: }
1543: }
1544: if (untie(%hash)) {
1545: chop($qresult);
1546: print $client "$qresult\n";
1547: } else {
1548: print $client "error: ".($!+0)
1549: ." untie(GDBM) Failed ".
1550: "while attempting dump\n";
1551: }
1552: } else {
1553: print $client "error: ".($!+0)
1554: ." tie(GDBM) Failed ".
1555: "while attempting dump\n";
1556: }
1557: # ----------------------------------------------------------------------- store
1558: } elsif ($userinput =~ /^store/) {
1559: my ($cmd,$udom,$uname,$namespace,$rid,$what)
1560: =split(/:/,$userinput);
1561: $namespace=~s/\//\_/g;
1562: $namespace=~s/\W//g;
1563: if ($namespace ne 'roles') {
1564: chomp($what);
1565: my $proname=propath($udom,$uname);
1566: my $now=time;
1567: unless ($namespace=~/^nohist\_/) {
1568: my $hfh;
1569: if (
1570: $hfh=IO::File->new(">>$proname/$namespace.hist")
1571: ) { print $hfh "P:$now:$rid:$what\n"; }
1572: }
1573: my @pairs=split(/\&/,$what);
1574: my %hash;
1575: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1576: my @previouskeys=split(/&/,$hash{"keys:$rid"});
1577: my $key;
1578: $hash{"version:$rid"}++;
1579: my $version=$hash{"version:$rid"};
1580: my $allkeys='';
1581: foreach my $pair (@pairs) {
1582: my ($key,$value)=split(/=/,$pair);
1583: $allkeys.=$key.':';
1584: $hash{"$version:$rid:$key"}=$value;
1585: }
1586: $hash{"$version:$rid:timestamp"}=$now;
1587: $allkeys.='timestamp';
1588: $hash{"$version:keys:$rid"}=$allkeys;
1589: if (untie(%hash)) {
1590: print $client "ok\n";
1591: } else {
1592: print $client "error: ".($!+0)
1593: ." untie(GDBM) Failed ".
1594: "while attempting store\n";
1595: }
1596: } else {
1597: print $client "error: ".($!+0)
1598: ." tie(GDBM) Failed ".
1599: "while attempting store\n";
1600: }
1601: } else {
1602: print $client "refused\n";
1603: }
1604: # --------------------------------------------------------------------- restore
1605: } elsif ($userinput =~ /^restore/) {
1606: my ($cmd,$udom,$uname,$namespace,$rid)
1607: =split(/:/,$userinput);
1608: $namespace=~s/\//\_/g;
1609: $namespace=~s/\W//g;
1610: chomp($rid);
1611: my $proname=propath($udom,$uname);
1612: my $qresult='';
1613: my %hash;
1614: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1615: my $version=$hash{"version:$rid"};
1616: $qresult.="version=$version&";
1617: my $scope;
1618: for ($scope=1;$scope<=$version;$scope++) {
1619: my $vkeys=$hash{"$scope:keys:$rid"};
1620: my @keys=split(/:/,$vkeys);
1621: my $key;
1622: $qresult.="$scope:keys=$vkeys&";
1623: foreach $key (@keys) {
1624: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
1625: }
1626: }
1627: if (untie(%hash)) {
1628: $qresult=~s/\&$//;
1629: print $client "$qresult\n";
1630: } else {
1631: print $client "error: ".($!+0)
1632: ." untie(GDBM) Failed ".
1633: "while attempting restore\n";
1634: }
1635: } else {
1636: print $client "error: ".($!+0)
1637: ." tie(GDBM) Failed ".
1638: "while attempting restore\n";
1639: }
1640: # -------------------------------------------------------------------- chatsend
1641: } elsif ($userinput =~ /^chatsend/) {
1642: my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
1643: &chatadd($cdom,$cnum,$newpost);
1644: print $client "ok\n";
1645: # -------------------------------------------------------------------- chatretr
1646: } elsif ($userinput =~ /^chatretr/) {
1647: my
1648: ($cmd,$cdom,$cnum,$udom,$uname)=split(/\:/,$userinput);
1649: my $reply='';
1650: foreach (&getchat($cdom,$cnum,$udom,$uname)) {
1651: $reply.=&escape($_).':';
1652: }
1653: $reply=~s/\:$//;
1654: print $client $reply."\n";
1655: # ------------------------------------------------------------------- querysend
1656: } elsif ($userinput =~ /^querysend/) {
1657: my ($cmd,$query,
1658: $arg1,$arg2,$arg3)=split(/\:/,$userinput);
1659: $query=~s/\n*$//g;
1660: print $client "".
1661: sqlreply("$hostid{$clientip}\&$query".
1662: "\&$arg1"."\&$arg2"."\&$arg3")."\n";
1663: # ------------------------------------------------------------------ queryreply
1664: } elsif ($userinput =~ /^queryreply/) {
1665: my ($cmd,$id,$reply)=split(/:/,$userinput);
1666: my $store;
1667: my $execdir=$perlvar{'lonDaemons'};
1668: if ($store=IO::File->new(">$execdir/tmp/$id")) {
1669: $reply=~s/\&/\n/g;
1670: print $store $reply;
1671: close $store;
1672: my $store2=IO::File->new(">$execdir/tmp/$id.end");
1673: print $store2 "done\n";
1674: close $store2;
1675: print $client "ok\n";
1676: }
1677: else {
1678: print $client "error: ".($!+0)
1679: ." IO::File->new Failed ".
1680: "while attempting queryreply\n";
1681: }
1682: # ----------------------------------------------------------------- courseidput
1683: } elsif ($userinput =~ /^courseidput/) {
1684: my ($cmd,$udom,$what)=split(/:/,$userinput);
1685: chomp($what);
1686: $udom=~s/\W//g;
1687: my $proname=
1688: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
1689: my $now=time;
1690: my @pairs=split(/\&/,$what);
1691: my %hash;
1692: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
1693: foreach my $pair (@pairs) {
1694: my ($key,$value)=split(/=/,$pair);
1695: $hash{$key}=$value.':'.$now;
1696: }
1697: if (untie(%hash)) {
1698: print $client "ok\n";
1699: } else {
1700: print $client "error: ".($!+0)
1701: ." untie(GDBM) Failed ".
1702: "while attempting courseidput\n";
1703: }
1704: } else {
1705: print $client "error: ".($!+0)
1706: ." tie(GDBM) Failed ".
1707: "while attempting courseidput\n";
1708: }
1709: # ---------------------------------------------------------------- courseiddump
1710: } elsif ($userinput =~ /^courseiddump/) {
1711: my ($cmd,$udom,$since,$description)
1712: =split(/:/,$userinput);
1713: if (defined($description)) {
1714: $description=&unescape($description);
1715: } else {
1716: $description='.';
1717: }
1718: unless (defined($since)) { $since=0; }
1719: my $qresult='';
1720: my $proname=
1721: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
1722: my %hash;
1723: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
1724: while (my ($key,$value) = each(%hash)) {
1725: my ($descr,$lasttime)=split(/\:/,$value);
1726: if ($lasttime<$since) { next; }
1727: if ($description eq '.') {
1728: $qresult.=$key.'='.$descr.'&';
1729: } else {
1730: my $unescapeVal = &unescape($descr);
1731: if (eval('$unescapeVal=~/$description/i')) {
1732: $qresult.="$key=$descr&";
1733: }
1734: }
1735: }
1736: if (untie(%hash)) {
1737: chop($qresult);
1738: print $client "$qresult\n";
1739: } else {
1740: print $client "error: ".($!+0)
1741: ." untie(GDBM) Failed ".
1742: "while attempting courseiddump\n";
1743: }
1744: } else {
1745: print $client "error: ".($!+0)
1746: ." tie(GDBM) Failed ".
1747: "while attempting courseiddump\n";
1748: }
1749: # ----------------------------------------------------------------------- idput
1750: } elsif ($userinput =~ /^idput/) {
1751: my ($cmd,$udom,$what)=split(/:/,$userinput);
1752: chomp($what);
1753: $udom=~s/\W//g;
1754: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
1755: my $now=time;
1756: {
1757: my $hfh;
1758: if (
1759: $hfh=IO::File->new(">>$proname.hist")
1760: ) { print $hfh "P:$now:$what\n"; }
1761: }
1762: my @pairs=split(/\&/,$what);
1763: my %hash;
1764: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
1765: foreach my $pair (@pairs) {
1766: my ($key,$value)=split(/=/,$pair);
1767: $hash{$key}=$value;
1768: }
1769: if (untie(%hash)) {
1770: print $client "ok\n";
1771: } else {
1772: print $client "error: ".($!+0)
1773: ." untie(GDBM) Failed ".
1774: "while attempting idput\n";
1775: }
1776: } else {
1777: print $client "error: ".($!+0)
1778: ." tie(GDBM) Failed ".
1779: "while attempting idput\n";
1780: }
1781: # ----------------------------------------------------------------------- idget
1782: } elsif ($userinput =~ /^idget/) {
1783: my ($cmd,$udom,$what)=split(/:/,$userinput);
1784: chomp($what);
1785: $udom=~s/\W//g;
1786: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
1787: my @queries=split(/\&/,$what);
1788: my $qresult='';
1789: my %hash;
1790: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
1791: for (my $i=0;$i<=$#queries;$i++) {
1792: $qresult.="$hash{$queries[$i]}&";
1793: }
1794: if (untie(%hash)) {
1795: $qresult=~s/\&$//;
1796: print $client "$qresult\n";
1797: } else {
1798: print $client "error: ".($!+0)
1799: ." untie(GDBM) Failed ".
1800: "while attempting idget\n";
1801: }
1802: } else {
1803: print $client "error: ".($!+0)
1804: ." tie(GDBM) Failed ".
1805: "while attempting idget\n";
1806: }
1807: # ---------------------------------------------------------------------- tmpput
1808: } elsif ($userinput =~ /^tmpput/) {
1809: my ($cmd,$what)=split(/:/,$userinput);
1810: my $store;
1811: $tmpsnum++;
1812: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
1813: $id=~s/\W/\_/g;
1814: $what=~s/\n//g;
1815: my $execdir=$perlvar{'lonDaemons'};
1816: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
1817: print $store $what;
1818: close $store;
1819: print $client "$id\n";
1820: }
1821: else {
1822: print $client "error: ".($!+0)
1823: ."IO::File->new Failed ".
1824: "while attempting tmpput\n";
1825: }
1826:
1827: # ---------------------------------------------------------------------- tmpget
1828: } elsif ($userinput =~ /^tmpget/) {
1829: my ($cmd,$id)=split(/:/,$userinput);
1830: chomp($id);
1831: $id=~s/\W/\_/g;
1832: my $store;
1833: my $execdir=$perlvar{'lonDaemons'};
1834: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
1835: my $reply=<$store>;
1836: print $client "$reply\n";
1837: close $store;
1838: }
1839: else {
1840: print $client "error: ".($!+0)
1841: ."IO::File->new Failed ".
1842: "while attempting tmpget\n";
1843: }
1844:
1845: # ---------------------------------------------------------------------- tmpdel
1846: } elsif ($userinput =~ /^tmpdel/) {
1847: my ($cmd,$id)=split(/:/,$userinput);
1848: chomp($id);
1849: $id=~s/\W/\_/g;
1850: my $execdir=$perlvar{'lonDaemons'};
1851: if (unlink("$execdir/tmp/$id.tmp")) {
1852: print $client "ok\n";
1853: } else {
1854: print $client "error: ".($!+0)
1855: ."Unlink tmp Failed ".
1856: "while attempting tmpdel\n";
1857: }
1858: # -------------------------------------------------------------------------- ls
1859: } elsif ($userinput =~ /^ls/) {
1860: my ($cmd,$ulsdir)=split(/:/,$userinput);
1861: my $ulsout='';
1862: my $ulsfn;
1863: if (-e $ulsdir) {
1864: if(-d $ulsdir) {
1865: if (opendir(LSDIR,$ulsdir)) {
1866: while ($ulsfn=readdir(LSDIR)) {
1867: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1868: $ulsout.=$ulsfn.'&'.
1869: join('&',@ulsstats).':';
1870: }
1871: closedir(LSDIR);
1872: }
1873: } else {
1874: my @ulsstats=stat($ulsdir);
1875: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1876: }
1877: } else {
1878: $ulsout='no_such_dir';
1879: }
1880: if ($ulsout eq '') { $ulsout='empty'; }
1881: print $client "$ulsout\n";
1882: # ----------------------------------------------------------------- setannounce
1883: } elsif ($userinput =~ /^setannounce/) {
1884: my ($cmd,$announcement)=split(/:/,$userinput);
1885: chomp($announcement);
1886: $announcement=&unescape($announcement);
1887: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
1888: '/announcement.txt')) {
1889: print $store $announcement;
1890: close $store;
1891: print $client "ok\n";
1892: } else {
1893: print $client "error: ".($!+0)."\n";
1894: }
1895: # ------------------------------------------------------------------ Hanging up
1896: } elsif (($userinput =~ /^exit/) ||
1897: ($userinput =~ /^init/)) {
1898: &logthis(
1899: "Client $clientip ($hostid{$clientip}) hanging up: $userinput");
1900: print $client "bye\n";
1901: $client->close();
1902: last;
1903: # ------------------------------------------------------------- unknown command
1904: } elsif ($userinput =~ /^sethost:/) {
1905: print $client &sethost($userinput)."\n";
1906: } elsif ($userinput =~/^version:/) {
1907: print $client &version($userinput)."\n";
1908: } else {
1909: # unknown command
1910: print $client "unknown_cmd\n";
1911: }
1912: # -------------------------------------------------------------------- complete
1913: alarm(0);
1914: &status('Listening to '.$hostid{$clientip});
1915: }
1916: # --------------------------------------------- client unknown or fishy, refuse
1917: } else {
1918: print $client "refused\n";
1919: $client->close();
1920: &logthis("<font color=blue>WARNING: "
1921: ."Rejected client $clientip, closing connection</font>");
1922: }
1923: }
1924:
1925: # =============================================================================
1926:
1927: &logthis("<font color=red>CRITICAL: "
1928: ."Disconnect from $clientip ($hostid{$clientip})</font>");
1929:
1930:
1931: # this exit is VERY important, otherwise the child will become
1932: # a producer of more and more children, forking yourself into
1933: # process death.
1934: exit;
1935:
1936: }
1937:
1938:
1939: #
1940: # Checks to see if the input roleput request was to set
1941: # an author role. If so, invokes the lchtmldir script to set
1942: # up a correct public_html
1943: # Parameters:
1944: # request - The request sent to the rolesput subchunk.
1945: # We're looking for /domain/_au
1946: # domain - The domain in which the user is having roles doctored.
1947: # user - Name of the user for which the role is being put.
1948: # authtype - The authentication type associated with the user.
1949: #
1950: sub ManagePermissions
1951: {
1952: my $request = shift;
1953: my $domain = shift;
1954: my $user = shift;
1955: my $authtype= shift;
1956:
1957: # See if the request is of the form /$domain/_au
1958: &logthis("ruequest is $request");
1959: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
1960: my $execdir = $perlvar{'lonDaemons'};
1961: my $userhome= "/home/$user" ;
1962: &logthis("system $execdir/lchtmldir $userhome $user $authtype");
1963: system("$execdir/lchtmldir $userhome $user $authtype");
1964: }
1965: }
1966: #
1967: # GetAuthType - Determines the authorization type of a user in a domain.
1968:
1969: # Returns the authorization type or nouser if there is no such user.
1970: #
1971: sub GetAuthType
1972: {
1973: my $domain = shift;
1974: my $user = shift;
1975:
1976: Debug("GetAuthType( $domain, $user ) \n");
1977: my $proname = &propath($domain, $user);
1978: my $passwdfile = "$proname/passwd";
1979: if( -e $passwdfile ) {
1980: my $pf = IO::File->new($passwdfile);
1981: my $realpassword = <$pf>;
1982: chomp($realpassword);
1983: Debug("Password info = $realpassword\n");
1984: my ($authtype, $contentpwd) = split(/:/, $realpassword);
1985: Debug("Authtype = $authtype, content = $contentpwd\n");
1986: my $availinfo = '';
1987: if($authtype eq 'krb4' or $authtype eq 'krb5') {
1988: $availinfo = $contentpwd;
1989: }
1990:
1991: return "$authtype:$availinfo";
1992: }
1993: else {
1994: Debug("Returning nouser");
1995: return "nouser";
1996: }
1997: }
1998:
1999: sub addline {
2000: my ($fname,$hostid,$ip,$newline)=@_;
2001: my $contents;
2002: my $found=0;
2003: my $expr='^'.$hostid.':'.$ip.':';
2004: $expr =~ s/\./\\\./g;
2005: my $sh;
2006: if ($sh=IO::File->new("$fname.subscription")) {
2007: while (my $subline=<$sh>) {
2008: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
2009: }
2010: $sh->close();
2011: }
2012: $sh=IO::File->new(">$fname.subscription");
2013: if ($contents) { print $sh $contents; }
2014: if ($newline) { print $sh $newline; }
2015: $sh->close();
2016: return $found;
2017: }
2018:
2019: sub getchat {
2020: my ($cdom,$cname,$udom,$uname)=@_;
2021: my %hash;
2022: my $proname=&propath($cdom,$cname);
2023: my @entries=();
2024: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
2025: &GDBM_READER(),0640)) {
2026: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
2027: untie %hash;
2028: }
2029: my @participants=();
2030: my $cutoff=time-60;
2031: if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db",
2032: &GDBM_WRCREAT(),0640)) {
2033: $hash{$uname.':'.$udom}=time;
2034: foreach (sort keys %hash) {
2035: if ($hash{$_}>$cutoff) {
2036: $participants[$#participants+1]='active_participant:'.$_;
2037: }
2038: }
2039: untie %hash;
2040: }
2041: return (@participants,@entries);
2042: }
2043:
2044: sub chatadd {
2045: my ($cdom,$cname,$newchat)=@_;
2046: my %hash;
2047: my $proname=&propath($cdom,$cname);
2048: my @entries=();
2049: my $time=time;
2050: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
2051: &GDBM_WRCREAT(),0640)) {
2052: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
2053: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
2054: my ($thentime,$idnum)=split(/\_/,$lastid);
2055: my $newid=$time.'_000000';
2056: if ($thentime==$time) {
2057: $idnum=~s/^0+//;
2058: $idnum++;
2059: $idnum=substr('000000'.$idnum,-6,6);
2060: $newid=$time.'_'.$idnum;
2061: }
2062: $hash{$newid}=$newchat;
2063: my $expired=$time-3600;
2064: foreach (keys %hash) {
2065: my ($thistime)=($_=~/(\d+)\_/);
2066: if ($thistime<$expired) {
2067: delete $hash{$_};
2068: }
2069: }
2070: untie %hash;
2071: }
2072: {
2073: my $hfh;
2074: if ($hfh=IO::File->new(">>$proname/chatroom.log")) {
2075: print $hfh "$time:".&unescape($newchat)."\n";
2076: }
2077: }
2078: }
2079:
2080: sub unsub {
2081: my ($fname,$clientip)=@_;
2082: my $result;
2083: if (unlink("$fname.$hostid{$clientip}")) {
2084: $result="ok\n";
2085: } else {
2086: $result="not_subscribed\n";
2087: }
2088: if (-e "$fname.subscription") {
2089: my $found=&addline($fname,$hostid{$clientip},$clientip,'');
2090: if ($found) { $result="ok\n"; }
2091: } else {
2092: if ($result != "ok\n") { $result="not_subscribed\n"; }
2093: }
2094: return $result;
2095: }
2096:
2097: sub currentversion {
2098: my $fname=shift;
2099: my $version=-1;
2100: my $ulsdir='';
2101: if ($fname=~/^(.+)\/[^\/]+$/) {
2102: $ulsdir=$1;
2103: }
2104: my ($fnamere1,$fnamere2);
2105: # remove version if already specified
2106: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
2107: # get the bits that go before and after the version number
2108: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
2109: $fnamere1=$1;
2110: $fnamere2='.'.$2;
2111: }
2112: if (-e $fname) { $version=1; }
2113: if (-e $ulsdir) {
2114: if(-d $ulsdir) {
2115: if (opendir(LSDIR,$ulsdir)) {
2116: my $ulsfn;
2117: while ($ulsfn=readdir(LSDIR)) {
2118: # see if this is a regular file (ignore links produced earlier)
2119: my $thisfile=$ulsdir.'/'.$ulsfn;
2120: unless (-l $thisfile) {
2121: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E/) {
2122: if ($1>$version) { $version=$1; }
2123: }
2124: }
2125: }
2126: closedir(LSDIR);
2127: $version++;
2128: }
2129: }
2130: }
2131: return $version;
2132: }
2133:
2134: sub thisversion {
2135: my $fname=shift;
2136: my $version=-1;
2137: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
2138: $version=$1;
2139: }
2140: return $version;
2141: }
2142:
2143: sub subscribe {
2144: my ($userinput,$clientip)=@_;
2145: my $result;
2146: my ($cmd,$fname)=split(/:/,$userinput);
2147: my $ownership=&ishome($fname);
2148: if ($ownership eq 'owner') {
2149: # explitly asking for the current version?
2150: unless (-e $fname) {
2151: my $currentversion=¤tversion($fname);
2152: if (&thisversion($fname)==$currentversion) {
2153: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
2154: my $root=$1;
2155: my $extension=$2;
2156: symlink($root.'.'.$extension,
2157: $root.'.'.$currentversion.'.'.$extension);
2158: unless ($extension=~/\.meta$/) {
2159: symlink($root.'.'.$extension.'.meta',
2160: $root.'.'.$currentversion.'.'.$extension.'.meta');
2161: }
2162: }
2163: }
2164: }
2165: if (-e $fname) {
2166: if (-d $fname) {
2167: $result="directory\n";
2168: } else {
2169: if (-e "$fname.$hostid{$clientip}") {&unsub($fname,$clientip);}
2170: my $now=time;
2171: my $found=&addline($fname,$hostid{$clientip},$clientip,
2172: "$hostid{$clientip}:$clientip:$now\n");
2173: if ($found) { $result="$fname\n"; }
2174: # if they were subscribed to only meta data, delete that
2175: # subscription, when you subscribe to a file you also get
2176: # the metadata
2177: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
2178: $fname=~s/\/home\/httpd\/html\/res/raw/;
2179: $fname="http://$thisserver/".$fname;
2180: $result="$fname\n";
2181: }
2182: } else {
2183: $result="not_found\n";
2184: }
2185: } else {
2186: $result="rejected\n";
2187: }
2188: return $result;
2189: }
2190:
2191: sub make_passwd_file {
2192: my ($uname, $umode,$npass,$passfilename)=@_;
2193: my $result="ok\n";
2194: if ($umode eq 'krb4' or $umode eq 'krb5') {
2195: {
2196: my $pf = IO::File->new(">$passfilename");
2197: print $pf "$umode:$npass\n";
2198: }
2199: } elsif ($umode eq 'internal') {
2200: my $salt=time;
2201: $salt=substr($salt,6,2);
2202: my $ncpass=crypt($npass,$salt);
2203: {
2204: &Debug("Creating internal auth");
2205: my $pf = IO::File->new(">$passfilename");
2206: print $pf "internal:$ncpass\n";
2207: }
2208: } elsif ($umode eq 'localauth') {
2209: {
2210: my $pf = IO::File->new(">$passfilename");
2211: print $pf "localauth:$npass\n";
2212: }
2213: } elsif ($umode eq 'unix') {
2214: {
2215: my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
2216: {
2217: &Debug("Executing external: ".$execpath);
2218: &Debug("user = ".$uname.", Password =". $npass);
2219: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
2220: print $se "$uname\n";
2221: print $se "$npass\n";
2222: print $se "$npass\n";
2223: }
2224: my $useraddok = $?;
2225: if($useraddok > 0) {
2226: &logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));
2227: }
2228: my $pf = IO::File->new(">$passfilename");
2229: print $pf "unix:\n";
2230: }
2231: } elsif ($umode eq 'none') {
2232: {
2233: my $pf = IO::File->new(">$passfilename");
2234: print $pf "none:\n";
2235: }
2236: } else {
2237: $result="auth_mode_error\n";
2238: }
2239: return $result;
2240: }
2241:
2242: sub sethost {
2243: my ($remotereq) = @_;
2244: my (undef,$hostid)=split(/:/,$remotereq);
2245: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
2246: if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
2247: $currenthostid=$hostid;
2248: $currentdomainid=$hostdom{$hostid};
2249: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
2250: } else {
2251: &logthis("Requested host id $hostid not an alias of ".
2252: $perlvar{'lonHostID'}." refusing connection");
2253: return 'unable_to_set';
2254: }
2255: return 'ok';
2256: }
2257:
2258: sub version {
2259: my ($userinput)=@_;
2260: $remoteVERSION=(split(/:/,$userinput))[1];
2261: return "version:$VERSION";
2262: }
2263:
2264: #There is a copy of this in lonnet.pm
2265: sub userload {
2266: my $numusers=0;
2267: {
2268: opendir(LONIDS,$perlvar{'lonIDsDir'});
2269: my $filename;
2270: my $curtime=time;
2271: while ($filename=readdir(LONIDS)) {
2272: if ($filename eq '.' || $filename eq '..') {next;}
2273: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
2274: if ($curtime-$mtime < 3600) { $numusers++; }
2275: }
2276: closedir(LONIDS);
2277: }
2278: my $userloadpercent=0;
2279: my $maxuserload=$perlvar{'lonUserLoadLim'};
2280: if ($maxuserload) {
2281: $userloadpercent=100*$numusers/$maxuserload;
2282: }
2283: $userloadpercent=sprintf("%.2f",$userloadpercent);
2284: return $userloadpercent;
2285: }
2286:
2287: # ----------------------------------- POD (plain old documentation, CPAN style)
2288:
2289: =head1 NAME
2290:
2291: lond - "LON Daemon" Server (port "LOND" 5663)
2292:
2293: =head1 SYNOPSIS
2294:
2295: Usage: B<lond>
2296:
2297: Should only be run as user=www. This is a command-line script which
2298: is invoked by B<loncron>. There is no expectation that a typical user
2299: will manually start B<lond> from the command-line. (In other words,
2300: DO NOT START B<lond> YOURSELF.)
2301:
2302: =head1 DESCRIPTION
2303:
2304: There are two characteristics associated with the running of B<lond>,
2305: PROCESS MANAGEMENT (starting, stopping, handling child processes)
2306: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
2307: subscriptions, etc). These are described in two large
2308: sections below.
2309:
2310: B<PROCESS MANAGEMENT>
2311:
2312: Preforker - server who forks first. Runs as a daemon. HUPs.
2313: Uses IDEA encryption
2314:
2315: B<lond> forks off children processes that correspond to the other servers
2316: in the network. Management of these processes can be done at the
2317: parent process level or the child process level.
2318:
2319: B<logs/lond.log> is the location of log messages.
2320:
2321: The process management is now explained in terms of linux shell commands,
2322: subroutines internal to this code, and signal assignments:
2323:
2324: =over 4
2325:
2326: =item *
2327:
2328: PID is stored in B<logs/lond.pid>
2329:
2330: This is the process id number of the parent B<lond> process.
2331:
2332: =item *
2333:
2334: SIGTERM and SIGINT
2335:
2336: Parent signal assignment:
2337: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
2338:
2339: Child signal assignment:
2340: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
2341: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
2342: to restart a new child.)
2343:
2344: Command-line invocations:
2345: B<kill> B<-s> SIGTERM I<PID>
2346: B<kill> B<-s> SIGINT I<PID>
2347:
2348: Subroutine B<HUNTSMAN>:
2349: This is only invoked for the B<lond> parent I<PID>.
2350: This kills all the children, and then the parent.
2351: The B<lonc.pid> file is cleared.
2352:
2353: =item *
2354:
2355: SIGHUP
2356:
2357: Current bug:
2358: This signal can only be processed the first time
2359: on the parent process. Subsequent SIGHUP signals
2360: have no effect.
2361:
2362: Parent signal assignment:
2363: $SIG{HUP} = \&HUPSMAN;
2364:
2365: Child signal assignment:
2366: none (nothing happens)
2367:
2368: Command-line invocations:
2369: B<kill> B<-s> SIGHUP I<PID>
2370:
2371: Subroutine B<HUPSMAN>:
2372: This is only invoked for the B<lond> parent I<PID>,
2373: This kills all the children, and then the parent.
2374: The B<lond.pid> file is cleared.
2375:
2376: =item *
2377:
2378: SIGUSR1
2379:
2380: Parent signal assignment:
2381: $SIG{USR1} = \&USRMAN;
2382:
2383: Child signal assignment:
2384: $SIG{USR1}= \&logstatus;
2385:
2386: Command-line invocations:
2387: B<kill> B<-s> SIGUSR1 I<PID>
2388:
2389: Subroutine B<USRMAN>:
2390: When invoked for the B<lond> parent I<PID>,
2391: SIGUSR1 is sent to all the children, and the status of
2392: each connection is logged.
2393:
2394: =item *
2395:
2396: SIGCHLD
2397:
2398: Parent signal assignment:
2399: $SIG{CHLD} = \&REAPER;
2400:
2401: Child signal assignment:
2402: none
2403:
2404: Command-line invocations:
2405: B<kill> B<-s> SIGCHLD I<PID>
2406:
2407: Subroutine B<REAPER>:
2408: This is only invoked for the B<lond> parent I<PID>.
2409: Information pertaining to the child is removed.
2410: The socket port is cleaned up.
2411:
2412: =back
2413:
2414: B<SERVER-SIDE ACTIVITIES>
2415:
2416: Server-side information can be accepted in an encrypted or non-encrypted
2417: method.
2418:
2419: =over 4
2420:
2421: =item ping
2422:
2423: Query a client in the hosts.tab table; "Are you there?"
2424:
2425: =item pong
2426:
2427: Respond to a ping query.
2428:
2429: =item ekey
2430:
2431: Read in encrypted key, make cipher. Respond with a buildkey.
2432:
2433: =item load
2434:
2435: Respond with CPU load based on a computation upon /proc/loadavg.
2436:
2437: =item currentauth
2438:
2439: Reply with current authentication information (only over an
2440: encrypted channel).
2441:
2442: =item auth
2443:
2444: Only over an encrypted channel, reply as to whether a user's
2445: authentication information can be validated.
2446:
2447: =item passwd
2448:
2449: Allow for a password to be set.
2450:
2451: =item makeuser
2452:
2453: Make a user.
2454:
2455: =item passwd
2456:
2457: Allow for authentication mechanism and password to be changed.
2458:
2459: =item home
2460:
2461: Respond to a question "are you the home for a given user?"
2462:
2463: =item update
2464:
2465: Update contents of a subscribed resource.
2466:
2467: =item unsubscribe
2468:
2469: The server is unsubscribing from a resource.
2470:
2471: =item subscribe
2472:
2473: The server is subscribing to a resource.
2474:
2475: =item log
2476:
2477: Place in B<logs/lond.log>
2478:
2479: =item put
2480:
2481: stores hash in namespace
2482:
2483: =item rolesput
2484:
2485: put a role into a user's environment
2486:
2487: =item get
2488:
2489: returns hash with keys from array
2490: reference filled in from namespace
2491:
2492: =item eget
2493:
2494: returns hash with keys from array
2495: reference filled in from namesp (encrypts the return communication)
2496:
2497: =item rolesget
2498:
2499: get a role from a user's environment
2500:
2501: =item del
2502:
2503: deletes keys out of array from namespace
2504:
2505: =item keys
2506:
2507: returns namespace keys
2508:
2509: =item dump
2510:
2511: dumps the complete (or key matching regexp) namespace into a hash
2512:
2513: =item store
2514:
2515: stores hash permanently
2516: for this url; hashref needs to be given and should be a \%hashname; the
2517: remaining args aren't required and if they aren't passed or are '' they will
2518: be derived from the ENV
2519:
2520: =item restore
2521:
2522: returns a hash for a given url
2523:
2524: =item querysend
2525:
2526: Tells client about the lonsql process that has been launched in response
2527: to a sent query.
2528:
2529: =item queryreply
2530:
2531: Accept information from lonsql and make appropriate storage in temporary
2532: file space.
2533:
2534: =item idput
2535:
2536: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
2537: for each student, defined perhaps by the institutional Registrar.)
2538:
2539: =item idget
2540:
2541: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
2542: for each student, defined perhaps by the institutional Registrar.)
2543:
2544: =item tmpput
2545:
2546: Accept and store information in temporary space.
2547:
2548: =item tmpget
2549:
2550: Send along temporarily stored information.
2551:
2552: =item ls
2553:
2554: List part of a user's directory.
2555:
2556: =item pushtable
2557:
2558: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
2559: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
2560: must be restored manually in case of a problem with the new table file.
2561: pushtable requires that the request be encrypted and validated via
2562: ValidateManager. The form of the command is:
2563: enc:pushtable tablename <tablecontents> \n
2564: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
2565: cleartext newline.
2566:
2567: =item Hanging up (exit or init)
2568:
2569: What to do when a client tells the server that they (the client)
2570: are leaving the network.
2571:
2572: =item unknown command
2573:
2574: If B<lond> is sent an unknown command (not in the list above),
2575: it replys to the client "unknown_cmd".
2576:
2577:
2578: =item UNKNOWN CLIENT
2579:
2580: If the anti-spoofing algorithm cannot verify the client,
2581: the client is rejected (with a "refused" message sent
2582: to the client, and the connection is closed.
2583:
2584: =back
2585:
2586: =head1 PREREQUISITES
2587:
2588: IO::Socket
2589: IO::File
2590: Apache::File
2591: Symbol
2592: POSIX
2593: Crypt::IDEA
2594: LWP::UserAgent()
2595: GDBM_File
2596: Authen::Krb4
2597: Authen::Krb5
2598:
2599: =head1 COREQUISITES
2600:
2601: =head1 OSNAMES
2602:
2603: linux
2604:
2605: =head1 SCRIPT CATEGORIES
2606:
2607: Server/Process
2608:
2609: =cut
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