Annotation of loncom/lond, revision 1.85
1.1 albertel 1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
1.60 www 4: #
1.85 ! www 5: # $Id: lond,v 1.84 2002/07/26 19:35:20 albertel 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
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: #
1.1 albertel 29: # 5/26/99,6/4,6/10,6/11,6/14,6/15,6/26,6/28,6/30,
1.2 www 30: # 7/8,7/9,7/10,7/12,7/17,7/19,9/21,
1.6 www 31: # 10/7,10/8,10/9,10/11,10/13,10/15,11/4,11/16,
1.11 www 32: # 12/7,12/15,01/06,01/11,01/12,01/14,2/8,
1.12 harris41 33: # 03/07,05/31 Gerd Kortemeyer
1.13 www 34: # 06/26 Scott Harrison
1.20 www 35: # 06/29,06/30,07/14,07/15,07/17,07/20,07/25,09/18 Gerd Kortemeyer
1.25 www 36: # 12/05 Scott Harrison
1.34 www 37: # 12/05,12/13,12/29 Gerd Kortemeyer
1.61 harris41 38: # YEAR=2001
1.36 www 39: # Jan 01 Scott Harrison
40: # 02/12 Gerd Kortemeyer
1.37 harris41 41: # 03/15 Scott Harrison
1.41 www 42: # 03/24 Gerd Kortemeyer
1.47 www 43: # 04/02 Scott Harrison
1.51 www 44: # 05/11,05/28,08/30 Gerd Kortemeyer
1.56 harris41 45: # 9/30,10/22,11/13,11/15,11/16 Scott Harrison
1.59 www 46: # 11/26,11/27 Gerd Kortemeyer
1.61 harris41 47: # 12/20 Scott Harrison
1.62 www 48: # 12/22 Gerd Kortemeyer
1.63 www 49: # YEAR=2002
1.65 www 50: # 01/20/02,02/05 Gerd Kortemeyer
1.71 www 51: # 02/05 Guy Albertelli
52: # 02/07 Scott Harrison
53: # 02/12 Gerd Kortemeyer
1.73 www 54: # 02/19 Matthew Hall
55: # 02/25 Gerd Kortemeyer
1.80 harris41 56: # 05/11 Scott Harrison
1.54 harris41 57: ###
58:
1.1 albertel 59: # based on "Perl Cookbook" ISBN 1-56592-243-3
60: # preforker - server who forks first
61: # runs as a daemon
62: # HUPs
63: # uses IDEA encryption
64:
1.80 harris41 65: use lib '/home/httpd/lib/perl/';
66: use LONCAPA::Configuration;
67:
1.1 albertel 68: use IO::Socket;
69: use IO::File;
70: use Apache::File;
71: use Symbol;
72: use POSIX;
73: use Crypt::IDEA;
74: use LWP::UserAgent();
1.3 www 75: use GDBM_File;
76: use Authen::Krb4;
1.49 albertel 77: use lib '/home/httpd/lib/perl/';
78: use localauth;
1.1 albertel 79:
1.77 foxr 80: my $DEBUG = 0; # Non zero to enable debug log entries.
81:
1.57 www 82: my $status='';
83: my $lastlog='';
84:
1.23 harris41 85: # grabs exception and records it to log before exiting
86: sub catchexception {
1.27 albertel 87: my ($error)=@_;
1.25 www 88: $SIG{'QUIT'}='DEFAULT';
89: $SIG{__DIE__}='DEFAULT';
1.23 harris41 90: &logthis("<font color=red>CRITICAL: "
91: ."ABNORMAL EXIT. Child $$ for server $wasserver died through "
1.27 albertel 92: ."a crash with this error msg->[$error]</font>");
1.57 www 93: &logthis('Famous last words: '.$status.' - '.$lastlog);
1.27 albertel 94: if ($client) { print $client "error: $error\n"; }
1.59 www 95: $server->close();
1.27 albertel 96: die($error);
1.23 harris41 97: }
98:
1.63 www 99: sub timeout {
100: &logthis("<font color=ref>CRITICAL: TIME OUT ".$$."</font>");
101: &catchexception('Timeout');
102: }
1.22 harris41 103: # -------------------------------- Set signal handlers to record abnormal exits
104:
105: $SIG{'QUIT'}=\&catchexception;
106: $SIG{__DIE__}=\&catchexception;
107:
1.81 matthew 108: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
109: &status("Read loncapa_apache.conf and loncapa.conf");
110: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa_apache.conf',
111: 'loncapa.conf');
1.80 harris41 112: my %perlvar=%{$perlvarref};
113: undef $perlvarref;
1.19 www 114:
1.35 harris41 115: # ----------------------------- Make sure this process is running from user=www
116: my $wwwid=getpwnam('www');
117: if ($wwwid!=$<) {
118: $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
119: $subj="LON: $perlvar{'lonHostID'} User ID mismatch";
1.37 harris41 120: system("echo 'User ID mismatch. lond must be run as user www.' |\
1.35 harris41 121: mailto $emailto -s '$subj' > /dev/null");
122: exit 1;
123: }
124:
1.19 www 125: # --------------------------------------------- Check if other instance running
126:
127: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
128:
129: if (-e $pidfile) {
130: my $lfh=IO::File->new("$pidfile");
131: my $pide=<$lfh>;
132: chomp($pide);
1.29 harris41 133: if (kill 0 => $pide) { die "already running"; }
1.19 www 134: }
1.1 albertel 135:
136: $PREFORK=4; # number of children to maintain, at least four spare
137:
138: # ------------------------------------------------------------- Read hosts file
139:
1.29 harris41 140: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
1.1 albertel 141:
142: while ($configline=<CONFIG>) {
143: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
1.70 harris41 144: chomp($ip); $ip=~s/\D+$//;
1.1 albertel 145: $hostid{$ip}=$id;
146: if ($id eq $perlvar{'lonHostID'}) { $thisserver=$name; }
147: $PREFORK++;
148: }
149: close(CONFIG);
150:
151: # establish SERVER socket, bind and listen.
152: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
153: Type => SOCK_STREAM,
154: Proto => 'tcp',
155: Reuse => 1,
156: Listen => 10 )
1.29 harris41 157: or die "making socket: $@\n";
1.1 albertel 158:
159: # --------------------------------------------------------- Do global variables
160:
161: # global variables
162:
1.75 foxr 163: $MAX_CLIENTS_PER_CHILD = 50; # number of clients each child should
1.1 albertel 164: # process
165: %children = (); # keys are current child process IDs
166: $children = 0; # current number of children
167:
168: sub REAPER { # takes care of dead children
169: $SIG{CHLD} = \&REAPER;
170: my $pid = wait;
1.67 albertel 171: if (defined($children{$pid})) {
172: &logthis("Child $pid died");
173: $children --;
174: delete $children{$pid};
175: } else {
176: &logthis("Unknown Child $pid died");
177: }
1.1 albertel 178: }
179:
180: sub HUNTSMAN { # signal handler for SIGINT
181: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
182: kill 'INT' => keys %children;
1.59 www 183: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.1 albertel 184: my $execdir=$perlvar{'lonDaemons'};
185: unlink("$execdir/logs/lond.pid");
1.9 www 186: &logthis("<font color=red>CRITICAL: Shutting down</font>");
1.1 albertel 187: exit; # clean up with dignity
188: }
189:
190: sub HUPSMAN { # signal handler for SIGHUP
191: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
192: kill 'INT' => keys %children;
1.59 www 193: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.9 www 194: &logthis("<font color=red>CRITICAL: Restarting</font>");
1.30 harris41 195: unlink("$execdir/logs/lond.pid");
1.1 albertel 196: my $execdir=$perlvar{'lonDaemons'};
197: exec("$execdir/lond"); # here we go again
198: }
199:
1.57 www 200: sub checkchildren {
201: &initnewstatus();
202: &logstatus();
203: &logthis('Going to check on the children');
1.63 www 204: $docdir=$perlvar{'lonDocRoot'};
1.61 harris41 205: foreach (sort keys %children) {
1.57 www 206: sleep 1;
207: unless (kill 'USR1' => $_) {
208: &logthis ('Child '.$_.' is dead');
209: &logstatus($$.' is dead');
210: }
1.61 harris41 211: }
1.63 www 212: sleep 5;
213: foreach (sort keys %children) {
214: unless (-e "$docdir/lon-status/londchld/$_.txt") {
215: &logthis('Child '.$_.' did not respond');
1.67 albertel 216: kill 9 => $_;
217: $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
218: $subj="LON: $perlvar{'lonHostID'} killed lond process $_";
1.68 albertel 219: my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
1.66 www 220: $execdir=$perlvar{'lonDaemons'};
1.67 albertel 221: $result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`
1.63 www 222: }
223: }
1.57 www 224: }
225:
1.1 albertel 226: # --------------------------------------------------------------------- Logging
227:
228: sub logthis {
229: my $message=shift;
230: my $execdir=$perlvar{'lonDaemons'};
231: my $fh=IO::File->new(">>$execdir/logs/lond.log");
232: my $now=time;
233: my $local=localtime($now);
1.58 www 234: $lastlog=$local.': '.$message;
1.1 albertel 235: print $fh "$local ($$): $message\n";
236: }
237:
1.77 foxr 238: # ------------------------- Conditional log if $DEBUG true.
239: sub Debug {
240: my $message = shift;
241: if($DEBUG) {
242: &logthis($message);
243: }
244: }
1.57 www 245: # ------------------------------------------------------------------ Log status
246:
247: sub logstatus {
248: my $docdir=$perlvar{'lonDocRoot'};
1.63 www 249: {
1.57 www 250: my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");
251: print $fh $$."\t".$status."\t".$lastlog."\n";
1.63 www 252: $fh->close();
253: }
254: {
255: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
256: print $fh $status."\n".$lastlog."\n".time;
257: $fh->close();
258: }
1.57 www 259: }
260:
261: sub initnewstatus {
262: my $docdir=$perlvar{'lonDocRoot'};
263: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
264: my $now=time;
265: my $local=localtime($now);
266: print $fh "LOND status $local - parent $$\n\n";
1.64 www 267: opendir(DIR,"$docdir/lon-status/londchld");
268: while ($filename=readdir(DIR)) {
269: unlink("$docdir/lon-status/londchld/$filename");
270: }
271: closedir(DIR);
1.57 www 272: }
273:
274: # -------------------------------------------------------------- Status setting
275:
276: sub status {
277: my $what=shift;
278: my $now=time;
279: my $local=localtime($now);
280: $status=$local.': '.$what;
281: }
1.11 www 282:
283: # -------------------------------------------------------- Escape Special Chars
284:
285: sub escape {
286: my $str=shift;
287: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
288: return $str;
289: }
290:
291: # ----------------------------------------------------- Un-Escape Special Chars
292:
293: sub unescape {
294: my $str=shift;
295: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
296: return $str;
297: }
298:
1.1 albertel 299: # ----------------------------------------------------------- Send USR1 to lonc
300:
301: sub reconlonc {
302: my $peerfile=shift;
303: &logthis("Trying to reconnect for $peerfile");
304: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
305: if (my $fh=IO::File->new("$loncfile")) {
306: my $loncpid=<$fh>;
307: chomp($loncpid);
308: if (kill 0 => $loncpid) {
309: &logthis("lonc at pid $loncpid responding, sending USR1");
310: kill USR1 => $loncpid;
1.75 foxr 311: sleep 5;
1.1 albertel 312: if (-e "$peerfile") { return; }
313: &logthis("$peerfile still not there, give it another try");
1.75 foxr 314: sleep 10;
1.1 albertel 315: if (-e "$peerfile") { return; }
1.9 www 316: &logthis(
317: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
1.1 albertel 318: } else {
1.9 www 319: &logthis(
320: "<font color=red>CRITICAL: "
321: ."lonc at pid $loncpid not responding, giving up</font>");
1.1 albertel 322: }
323: } else {
1.9 www 324: &logthis('<font color=red>CRITICAL: lonc not running, giving up</font>');
1.1 albertel 325: }
326: }
327:
328: # -------------------------------------------------- Non-critical communication
1.11 www 329:
1.1 albertel 330: sub subreply {
331: my ($cmd,$server)=@_;
332: my $peerfile="$perlvar{'lonSockDir'}/$server";
333: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
334: Type => SOCK_STREAM,
335: Timeout => 10)
336: or return "con_lost";
337: print $sclient "$cmd\n";
338: my $answer=<$sclient>;
339: chomp($answer);
340: if (!$answer) { $answer="con_lost"; }
341: return $answer;
342: }
343:
344: sub reply {
345: my ($cmd,$server)=@_;
346: my $answer;
347: if ($server ne $perlvar{'lonHostID'}) {
348: $answer=subreply($cmd,$server);
349: if ($answer eq 'con_lost') {
350: $answer=subreply("ping",$server);
351: if ($answer ne $server) {
1.75 foxr 352: &logthis("sub reply: answer != server");
1.1 albertel 353: &reconlonc("$perlvar{'lonSockDir'}/$server");
354: }
355: $answer=subreply($cmd,$server);
356: }
357: } else {
358: $answer='self_reply';
359: }
360: return $answer;
361: }
362:
1.13 www 363: # -------------------------------------------------------------- Talk to lonsql
364:
1.12 harris41 365: sub sqlreply {
366: my ($cmd)=@_;
367: my $answer=subsqlreply($cmd);
368: if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }
369: return $answer;
370: }
371:
372: sub subsqlreply {
373: my ($cmd)=@_;
374: my $unixsock="mysqlsock";
375: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
376: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
377: Type => SOCK_STREAM,
378: Timeout => 10)
379: or return "con_lost";
380: print $sclient "$cmd\n";
381: my $answer=<$sclient>;
382: chomp($answer);
383: if (!$answer) { $answer="con_lost"; }
384: return $answer;
385: }
386:
1.1 albertel 387: # -------------------------------------------- Return path to profile directory
1.11 www 388:
1.1 albertel 389: sub propath {
390: my ($udom,$uname)=@_;
391: $udom=~s/\W//g;
392: $uname=~s/\W//g;
1.16 www 393: my $subdir=$uname.'__';
1.1 albertel 394: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
395: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
396: return $proname;
397: }
398:
399: # --------------------------------------- Is this the home server of an author?
1.11 www 400:
1.1 albertel 401: sub ishome {
402: my $author=shift;
403: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
404: my ($udom,$uname)=split(/\//,$author);
405: my $proname=propath($udom,$uname);
406: if (-e $proname) {
407: return 'owner';
408: } else {
409: return 'not_owner';
410: }
411: }
412:
413: # ======================================================= Continue main program
414: # ---------------------------------------------------- Fork once and dissociate
415:
416: $fpid=fork;
417: exit if $fpid;
1.29 harris41 418: die "Couldn't fork: $!" unless defined ($fpid);
1.1 albertel 419:
1.29 harris41 420: POSIX::setsid() or die "Can't start new session: $!";
1.1 albertel 421:
422: # ------------------------------------------------------- Write our PID on disk
423:
424: $execdir=$perlvar{'lonDaemons'};
425: open (PIDSAVE,">$execdir/logs/lond.pid");
426: print PIDSAVE "$$\n";
427: close(PIDSAVE);
1.9 www 428: &logthis("<font color=red>CRITICAL: ---------- Starting ----------</font>");
1.57 www 429: &status('Starting');
1.1 albertel 430:
431: # ------------------------------------------------------- Now we are on our own
432:
433: # Fork off our children.
434: for (1 .. $PREFORK) {
435: make_new_child();
436: }
437:
438: # ----------------------------------------------------- Install signal handlers
439:
1.57 www 440: &status('Forked children');
441:
1.1 albertel 442: $SIG{CHLD} = \&REAPER;
443: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
444: $SIG{HUP} = \&HUPSMAN;
1.57 www 445: $SIG{USR1} = \&checkchildren;
1.1 albertel 446:
447: # And maintain the population.
448: while (1) {
1.57 www 449: &status('Sleeping');
1.1 albertel 450: sleep; # wait for a signal (i.e., child's death)
1.57 www 451: &logthis('Woke up');
452: &status('Woke up');
1.1 albertel 453: for ($i = $children; $i < $PREFORK; $i++) {
454: make_new_child(); # top up the child pool
455: }
456: }
457:
458: sub make_new_child {
459: my $pid;
460: my $cipher;
461: my $sigset;
462: &logthis("Attempting to start child");
463: # block signal for fork
464: $sigset = POSIX::SigSet->new(SIGINT);
465: sigprocmask(SIG_BLOCK, $sigset)
1.29 harris41 466: or die "Can't block SIGINT for fork: $!\n";
1.1 albertel 467:
1.29 harris41 468: die "fork: $!" unless defined ($pid = fork);
1.1 albertel 469:
470: if ($pid) {
471: # Parent records the child's birth and returns.
472: sigprocmask(SIG_UNBLOCK, $sigset)
1.29 harris41 473: or die "Can't unblock SIGINT for fork: $!\n";
1.1 albertel 474: $children{$pid} = 1;
475: $children++;
1.57 www 476: &status('Started child '.$pid);
1.1 albertel 477: return;
478: } else {
479: # Child can *not* return from this subroutine.
480: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
1.57 www 481: $SIG{USR1}= \&logstatus;
1.63 www 482: $SIG{ALRM}= \&timeout;
1.57 www 483: $lastlog='Forked ';
484: $status='Forked';
485:
1.1 albertel 486: # unblock signals
487: sigprocmask(SIG_UNBLOCK, $sigset)
1.29 harris41 488: or die "Can't unblock SIGINT for fork: $!\n";
1.13 www 489:
490: $tmpsnum=0;
1.1 albertel 491:
492: # handle connections until we've reached $MAX_CLIENTS_PER_CHILD
493: for ($i=0; $i < $MAX_CLIENTS_PER_CHILD; $i++) {
1.57 www 494: &status('Idle, waiting for connection');
1.1 albertel 495: $client = $server->accept() or last;
1.57 www 496: &status('Accepted connection');
1.1 albertel 497: # =============================================================================
498: # do something with the connection
499: # -----------------------------------------------------------------------------
1.2 www 500: # see if we know client and check for spoof IP by challenge
1.1 albertel 501: my $caller=getpeername($client);
502: my ($port,$iaddr)=unpack_sockaddr_in($caller);
503: my $clientip=inet_ntoa($iaddr);
504: my $clientrec=($hostid{$clientip} ne undef);
1.9 www 505: &logthis(
1.51 www 506: "<font color=yellow>INFO: Connection $i, $clientip ($hostid{$clientip})</font>"
507: );
1.57 www 508: &status("Connecting $clientip ($hostid{$clientip})");
1.2 www 509: my $clientok;
1.1 albertel 510: if ($clientrec) {
1.57 www 511: &status("Waiting for init from $clientip ($hostid{$clientip})");
1.2 www 512: my $remotereq=<$client>;
513: $remotereq=~s/\W//g;
514: if ($remotereq eq 'init') {
515: my $challenge="$$".time;
516: print $client "$challenge\n";
1.57 www 517: &status(
518: "Waiting for challenge reply from $clientip ($hostid{$clientip})");
1.2 www 519: $remotereq=<$client>;
520: $remotereq=~s/\W//g;
521: if ($challenge eq $remotereq) {
522: $clientok=1;
523: print $client "ok\n";
524: } else {
1.9 www 525: &logthis(
526: "<font color=blue>WARNING: $clientip did not reply challenge</font>");
1.57 www 527: &status('No challenge reply '.$clientip);
1.2 www 528: }
529: } else {
1.9 www 530: &logthis(
531: "<font color=blue>WARNING: "
532: ."$clientip failed to initialize: >$remotereq< </font>");
1.57 www 533: &status('No init '.$clientip);
1.2 www 534: }
535: } else {
1.9 www 536: &logthis(
537: "<font color=blue>WARNING: Unknown client $clientip</font>");
1.57 www 538: &status('Hung up on '.$clientip);
1.2 www 539: }
540: if ($clientok) {
1.1 albertel 541: # ---------------- New known client connecting, could mean machine online again
1.75 foxr 542:
1.76 foxr 543: &reconlonc("$perlvar{'lonSockDir'}/$hostid{$clientip}");
1.9 www 544: &logthis(
545: "<font color=green>Established connection: $hostid{$clientip}</font>");
1.58 www 546: &status('Will listen to '.$hostid{$clientip});
1.1 albertel 547: # ------------------------------------------------------------ Process requests
548: while (my $userinput=<$client>) {
549: chomp($userinput);
1.79 foxr 550: Debug("Request = $userinput\n");
1.57 www 551: &status('Processing '.$hostid{$clientip}.': '.$userinput);
1.1 albertel 552: my $wasenc=0;
1.63 www 553: alarm(120);
1.1 albertel 554: # ------------------------------------------------------------ See if encrypted
555: if ($userinput =~ /^enc/) {
556: if ($cipher) {
557: my ($cmd,$cmdlength,$encinput)=split(/:/,$userinput);
558: $userinput='';
559: for (my $encidx=0;$encidx<length($encinput);$encidx+=16) {
560: $userinput.=
561: $cipher->decrypt(
562: pack("H16",substr($encinput,$encidx,16))
563: );
564: }
565: $userinput=substr($userinput,0,$cmdlength);
566: $wasenc=1;
567: }
1.75 foxr 568: }
569:
1.1 albertel 570: # ------------------------------------------------------------- Normal commands
571: # ------------------------------------------------------------------------ ping
572: if ($userinput =~ /^ping/) {
573: print $client "$perlvar{'lonHostID'}\n";
574: # ------------------------------------------------------------------------ pong
575: } elsif ($userinput =~ /^pong/) {
576: $reply=reply("ping",$hostid{$clientip});
577: print $client "$perlvar{'lonHostID'}:$reply\n";
578: # ------------------------------------------------------------------------ ekey
579: } elsif ($userinput =~ /^ekey/) {
580: my $buildkey=time.$$.int(rand 100000);
581: $buildkey=~tr/1-6/A-F/;
582: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
583: my $key=$perlvar{'lonHostID'}.$hostid{$clientip};
584: $key=~tr/a-z/A-Z/;
585: $key=~tr/G-P/0-9/;
586: $key=~tr/Q-Z/0-9/;
587: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
588: $key=substr($key,0,32);
589: my $cipherkey=pack("H32",$key);
590: $cipher=new IDEA $cipherkey;
591: print $client "$buildkey\n";
592: # ------------------------------------------------------------------------ load
593: } elsif ($userinput =~ /^load/) {
594: my $loadavg;
595: {
596: my $loadfile=IO::File->new('/proc/loadavg');
597: $loadavg=<$loadfile>;
598: }
599: $loadavg =~ s/\s.*//g;
600: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
601: print $client "$loadpercent\n";
1.54 harris41 602: # ----------------------------------------------------------------- currentauth
603: } elsif ($userinput =~ /^currentauth/) {
604: if ($wasenc==1) {
605: my ($cmd,$udom,$uname)=split(/:/,$userinput);
1.79 foxr 606: my $result = GetAuthType($udom, $uname);
1.78 foxr 607: if($result eq "nouser") {
608: print $client "unknown_user\n";
609: }
610: else {
611: print $client "$result\n"
612: }
1.54 harris41 613: } else {
614: print $client "refused\n";
615: }
1.1 albertel 616: # ------------------------------------------------------------------------ auth
617: } elsif ($userinput =~ /^auth/) {
618: if ($wasenc==1) {
619: my ($cmd,$udom,$uname,$upass)=split(/:/,$userinput);
620: chomp($upass);
1.11 www 621: $upass=unescape($upass);
1.1 albertel 622: my $proname=propath($udom,$uname);
623: my $passfilename="$proname/passwd";
624: if (-e $passfilename) {
625: my $pf = IO::File->new($passfilename);
626: my $realpasswd=<$pf>;
627: chomp($realpasswd);
1.2 www 628: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
629: my $pwdcorrect=0;
630: if ($howpwd eq 'internal') {
631: $pwdcorrect=
632: (crypt($upass,$contentpwd) eq $contentpwd);
633: } elsif ($howpwd eq 'unix') {
634: $contentpwd=(getpwnam($uname))[1];
1.52 harris41 635: my $pwauth_path="/usr/local/sbin/pwauth";
636: unless ($contentpwd eq 'x') {
637: $pwdcorrect=
638: (crypt($upass,$contentpwd) eq $contentpwd);
639: }
640: elsif (-e $pwauth_path) {
641: open PWAUTH, "|$pwauth_path" or
642: die "Cannot invoke authentication";
643: print PWAUTH "$uname\n$upass\n";
644: close PWAUTH;
645: $pwdcorrect=!$?;
646: }
1.3 www 647: } elsif ($howpwd eq 'krb4') {
1.71 www 648: $null=pack("C",0);
649: unless ($upass=~/$null/) {
1.3 www 650: $pwdcorrect=(
651: Authen::Krb4::get_pw_in_tkt($uname,"",
652: $contentpwd,'krbtgt',$contentpwd,1,
653: $upass) == 0);
1.71 www 654: } else { $pwdcorrect=0; }
1.50 albertel 655: } elsif ($howpwd eq 'localauth') {
1.49 albertel 656: $pwdcorrect=&localauth::localauth($uname,$upass,
657: $contentpwd);
658: }
1.2 www 659: if ($pwdcorrect) {
1.1 albertel 660: print $client "authorized\n";
661: } else {
662: print $client "non_authorized\n";
663: }
664: } else {
665: print $client "unknown_user\n";
666: }
667: } else {
668: print $client "refused\n";
669: }
670: # ---------------------------------------------------------------------- passwd
671: } elsif ($userinput =~ /^passwd/) {
672: if ($wasenc==1) {
673: my
674: ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
675: chomp($npass);
1.32 www 676: $upass=&unescape($upass);
677: $npass=&unescape($npass);
1.72 matthew 678: &logthis("Trying to change password for $uname");
679: my $proname=propath($udom,$uname);
1.1 albertel 680: my $passfilename="$proname/passwd";
681: if (-e $passfilename) {
682: my $realpasswd;
683: { my $pf = IO::File->new($passfilename);
684: $realpasswd=<$pf>; }
685: chomp($realpasswd);
1.2 www 686: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
687: if ($howpwd eq 'internal') {
688: if (crypt($upass,$contentpwd) eq $contentpwd) {
689: my $salt=time;
690: $salt=substr($salt,6,2);
691: my $ncpass=crypt($npass,$salt);
1.1 albertel 692: { my $pf = IO::File->new(">$passfilename");
1.31 www 693: print $pf "internal:$ncpass\n"; }
1.72 matthew 694: &logthis("Result of password change for $uname: pwchange_success");
1.1 albertel 695: print $client "ok\n";
1.2 www 696: } else {
697: print $client "non_authorized\n";
698: }
1.72 matthew 699: } elsif ($howpwd eq 'unix') {
700: # Unix means we have to access /etc/password
701: # one way or another.
702: # First: Make sure the current password is
703: # correct
704: $contentpwd=(getpwnam($uname))[1];
705: my $pwdcorrect = "0";
706: my $pwauth_path="/usr/local/sbin/pwauth";
707: unless ($contentpwd eq 'x') {
708: $pwdcorrect=
709: (crypt($upass,$contentpwd) eq $contentpwd);
710: } elsif (-e $pwauth_path) {
711: open PWAUTH, "|$pwauth_path" or
712: die "Cannot invoke authentication";
713: print PWAUTH "$uname\n$upass\n";
714: close PWAUTH;
715: $pwdcorrect=!$?;
716: }
717: if ($pwdcorrect) {
718: my $execdir=$perlvar{'lonDaemons'};
719: my $pf = IO::File->new("|$execdir/lcpasswd");
720: print $pf "$uname\n$npass\n$npass\n";
721: close $pf;
722: my $result = ($?>0 ? 'pwchange_failure'
723: : 'ok');
724: &logthis("Result of password change for $uname: $result");
725: print $client "$result\n";
726: } else {
727: print $client "non_authorized\n";
728: }
729: } else {
1.2 www 730: print $client "auth_mode_error\n";
1.1 albertel 731: }
732: } else {
733: print $client "unknown_user\n";
1.31 www 734: }
735: } else {
736: print $client "refused\n";
737: }
738: # -------------------------------------------------------------------- makeuser
739: } elsif ($userinput =~ /^makeuser/) {
1.77 foxr 740: Debug("Make user received");
1.56 harris41 741: my $oldumask=umask(0077);
1.31 www 742: if ($wasenc==1) {
743: my
744: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
1.77 foxr 745: &Debug("cmd =".$cmd." $udom =".$udom.
746: " uname=".$uname);
1.31 www 747: chomp($npass);
1.32 www 748: $npass=&unescape($npass);
1.31 www 749: my $proname=propath($udom,$uname);
750: my $passfilename="$proname/passwd";
1.77 foxr 751: &Debug("Password file created will be:".
752: $passfilename);
1.31 www 753: if (-e $passfilename) {
754: print $client "already_exists\n";
755: } elsif ($udom ne $perlvar{'lonDefDomain'}) {
756: print $client "not_right_domain\n";
757: } else {
758: @fpparts=split(/\//,$proname);
759: $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
760: $fperror='';
761: for ($i=3;$i<=$#fpparts;$i++) {
762: $fpnow.='/'.$fpparts[$i];
763: unless (-e $fpnow) {
764: unless (mkdir($fpnow,0777)) {
1.65 www 765: $fperror="error:$!";
1.31 www 766: }
767: }
768: }
769: unless ($fperror) {
1.34 www 770: if ($umode eq 'krb4') {
1.31 www 771: {
772: my $pf = IO::File->new(">$passfilename");
1.33 www 773: print $pf "krb4:$npass\n";
1.31 www 774: }
775: print $client "ok\n";
776: } elsif ($umode eq 'internal') {
777: my $salt=time;
778: $salt=substr($salt,6,2);
779: my $ncpass=crypt($npass,$salt);
780: {
1.77 foxr 781: &Debug("Creating internal auth");
782: my $pf = IO::File->new(">$passfilename");
1.31 www 783: print $pf "internal:$ncpass\n";
1.50 albertel 784: }
1.31 www 785: print $client "ok\n";
1.50 albertel 786: } elsif ($umode eq 'localauth') {
787: {
788: my $pf = IO::File->new(">$passfilename");
789: print $pf "localauth:$npass\n";
790: }
791: print $client "ok\n";
1.53 harris41 792: } elsif ($umode eq 'unix') {
793: {
794: my $execpath="$perlvar{'lonDaemons'}/".
795: "lcuseradd";
1.54 harris41 796: {
1.77 foxr 797: &Debug("Executing external: ".
798: $execpath);
1.54 harris41 799: my $se = IO::File->new("|$execpath");
800: print $se "$uname\n";
801: print $se "$npass\n";
802: print $se "$npass\n";
803: }
1.53 harris41 804: my $pf = IO::File->new(">$passfilename");
805: print $pf "unix:\n";
806: }
1.54 harris41 807: print $client "ok\n";
1.53 harris41 808: } elsif ($umode eq 'none') {
1.31 www 809: {
810: my $pf = IO::File->new(">$passfilename");
811: print $pf "none:\n";
812: }
813: print $client "ok\n";
814: } else {
815: print $client "auth_mode_error\n";
816: }
817: } else {
818: print $client "$fperror\n";
819: }
1.55 harris41 820: }
821: } else {
822: print $client "refused\n";
823: }
1.56 harris41 824: umask($oldumask);
1.55 harris41 825: # -------------------------------------------------------------- changeuserauth
826: } elsif ($userinput =~ /^changeuserauth/) {
1.77 foxr 827: &Debug("Changing authorization");
828: if ($wasenc==1) {
1.55 harris41 829: my
830: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
831: chomp($npass);
1.77 foxr 832: &Debug("cmd = ".$cmd." domain= ".$udom.
833: "uname =".$uname." umode= ".$umode);
1.55 harris41 834: $npass=&unescape($npass);
835: my $proname=propath($udom,$uname);
836: my $passfilename="$proname/passwd";
837: if ($udom ne $perlvar{'lonDefDomain'}) {
838: print $client "not_right_domain\n";
839: } else {
840: if ($umode eq 'krb4') {
841: {
842: my $pf = IO::File->new(">$passfilename");
843: print $pf "krb4:$npass\n";
844: }
845: print $client "ok\n";
846: } elsif ($umode eq 'internal') {
847: my $salt=time;
848: $salt=substr($salt,6,2);
849: my $ncpass=crypt($npass,$salt);
850: {
851: my $pf = IO::File->new(">$passfilename");
852: print $pf "internal:$ncpass\n";
853: }
854: print $client "ok\n";
855: } elsif ($umode eq 'localauth') {
856: {
857: my $pf = IO::File->new(">$passfilename");
858: print $pf "localauth:$npass\n";
859: }
860: print $client "ok\n";
861: } elsif ($umode eq 'unix') {
862: {
863: my $execpath="$perlvar{'lonDaemons'}/".
864: "lcuseradd";
865: {
866: my $se = IO::File->new("|$execpath");
867: print $se "$uname\n";
868: print $se "$npass\n";
869: print $se "$npass\n";
870: }
871: my $pf = IO::File->new(">$passfilename");
872: print $pf "unix:\n";
873: }
874: print $client "ok\n";
875: } elsif ($umode eq 'none') {
876: {
877: my $pf = IO::File->new(">$passfilename");
878: print $pf "none:\n";
879: }
880: print $client "ok\n";
881: } else {
882: print $client "auth_mode_error\n";
883: }
1.1 albertel 884: }
885: } else {
886: print $client "refused\n";
887: }
888: # ------------------------------------------------------------------------ home
889: } elsif ($userinput =~ /^home/) {
890: my ($cmd,$udom,$uname)=split(/:/,$userinput);
891: chomp($uname);
892: my $proname=propath($udom,$uname);
893: if (-e $proname) {
894: print $client "found\n";
895: } else {
896: print $client "not_found\n";
897: }
898: # ---------------------------------------------------------------------- update
899: } elsif ($userinput =~ /^update/) {
900: my ($cmd,$fname)=split(/:/,$userinput);
901: my $ownership=ishome($fname);
902: if ($ownership eq 'not_owner') {
903: if (-e $fname) {
904: my ($dev,$ino,$mode,$nlink,
905: $uid,$gid,$rdev,$size,
906: $atime,$mtime,$ctime,
907: $blksize,$blocks)=stat($fname);
908: $now=time;
909: $since=$now-$atime;
910: if ($since>$perlvar{'lonExpire'}) {
911: $reply=
912: reply("unsub:$fname","$hostid{$clientip}");
913: unlink("$fname");
914: } else {
915: my $transname="$fname.in.transfer";
916: my $remoteurl=
917: reply("sub:$fname","$hostid{$clientip}");
918: my $response;
919: {
920: my $ua=new LWP::UserAgent;
921: my $request=new HTTP::Request('GET',"$remoteurl");
922: $response=$ua->request($request,$transname);
923: }
924: if ($response->is_error()) {
1.24 albertel 925: unlink($transname);
1.1 albertel 926: my $message=$response->status_line;
927: &logthis(
928: "LWP GET: $message for $fname ($remoteurl)");
929: } else {
1.14 www 930: if ($remoteurl!~/\.meta$/) {
1.28 www 931: my $ua=new LWP::UserAgent;
1.14 www 932: my $mrequest=
933: new HTTP::Request('GET',$remoteurl.'.meta');
934: my $mresponse=
935: $ua->request($mrequest,$fname.'.meta');
936: if ($mresponse->is_error()) {
937: unlink($fname.'.meta');
938: }
939: }
1.1 albertel 940: rename($transname,$fname);
941: }
942: }
943: print $client "ok\n";
944: } else {
945: print $client "not_found\n";
946: }
947: } else {
948: print $client "rejected\n";
949: }
1.85 ! www 950: # -------------------------------------- fetch a user file from a remote server
! 951: } elsif ($userinput =~ /^fetchuserfile/) {
! 952: my ($cmd,$fname)=split(/:/,$userinput);
! 953: # ------------------------------------------ authenticate access to a user file
! 954: } elsif ($userinput =~ /^authuserfile/) {
! 955: my ($cmd,$fname,$session)=split(/:/,$userinput);
1.1 albertel 956: # ----------------------------------------------------------------- unsubscribe
957: } elsif ($userinput =~ /^unsub/) {
958: my ($cmd,$fname)=split(/:/,$userinput);
959: if (-e $fname) {
1.84 albertel 960: print $client &unsub($client,$fname,$clientip);
1.1 albertel 961: } else {
962: print $client "not_found\n";
963: }
964: # ------------------------------------------------------------------- subscribe
965: } elsif ($userinput =~ /^sub/) {
1.84 albertel 966: print $client &subscribe($userinput,$clientip);
1.12 harris41 967: # ------------------------------------------------------------------------- log
968: } elsif ($userinput =~ /^log/) {
969: my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
970: chomp($what);
971: my $proname=propath($udom,$uname);
972: my $now=time;
973: {
974: my $hfh;
975: if ($hfh=IO::File->new(">>$proname/activity.log")) {
976: print $hfh "$now:$hostid{$clientip}:$what\n";
977: print $client "ok\n";
978: } else {
979: print $client "error:$!\n";
980: }
981: }
1.1 albertel 982: # ------------------------------------------------------------------------- put
983: } elsif ($userinput =~ /^put/) {
1.6 www 984: my ($cmd,$udom,$uname,$namespace,$what)
1.1 albertel 985: =split(/:/,$userinput);
1.8 www 986: $namespace=~s/\//\_/g;
1.6 www 987: $namespace=~s/\W//g;
988: if ($namespace ne 'roles') {
1.1 albertel 989: chomp($what);
990: my $proname=propath($udom,$uname);
991: my $now=time;
1.48 www 992: unless ($namespace=~/^nohist\_/) {
1.1 albertel 993: my $hfh;
994: if (
995: $hfh=IO::File->new(">>$proname/$namespace.hist")
996: ) { print $hfh "P:$now:$what\n"; }
997: }
998: my @pairs=split(/\&/,$what);
1.4 www 999: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1.1 albertel 1000: foreach $pair (@pairs) {
1001: ($key,$value)=split(/=/,$pair);
1002: $hash{$key}=$value;
1003: }
1.4 www 1004: if (untie(%hash)) {
1.1 albertel 1005: print $client "ok\n";
1006: } else {
1007: print $client "error:$!\n";
1008: }
1009: } else {
1010: print $client "error:$!\n";
1011: }
1.6 www 1012: } else {
1013: print $client "refused\n";
1014: }
1015: # -------------------------------------------------------------------- rolesput
1016: } elsif ($userinput =~ /^rolesput/) {
1.77 foxr 1017: &Debug("rolesput");
1.6 www 1018: if ($wasenc==1) {
1019: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
1020: =split(/:/,$userinput);
1.77 foxr 1021: &Debug("cmd = ".$cmd." exedom= ".$exedom.
1022: "user = ".$exeuser." udom=".$udom.
1023: "what = ".$what);
1.6 www 1024: my $namespace='roles';
1025: chomp($what);
1026: my $proname=propath($udom,$uname);
1027: my $now=time;
1028: {
1029: my $hfh;
1030: if (
1031: $hfh=IO::File->new(">>$proname/$namespace.hist")
1032: ) {
1033: print $hfh "P:$now:$exedom:$exeuser:$what\n";
1034: }
1035: }
1036: my @pairs=split(/\&/,$what);
1037: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1038: foreach $pair (@pairs) {
1039: ($key,$value)=split(/=/,$pair);
1.78 foxr 1040: &ManagePermissions($key, $udom, $uname,
1041: &GetAuthType( $udom,
1042: $uname));
1.6 www 1043: $hash{$key}=$value;
1.78 foxr 1044:
1.6 www 1045: }
1046: if (untie(%hash)) {
1047: print $client "ok\n";
1048: } else {
1049: print $client "error:$!\n";
1050: }
1051: } else {
1052: print $client "error:$!\n";
1053: }
1054: } else {
1055: print $client "refused\n";
1056: }
1.1 albertel 1057: # ------------------------------------------------------------------------- get
1058: } elsif ($userinput =~ /^get/) {
1059: my ($cmd,$udom,$uname,$namespace,$what)
1060: =split(/:/,$userinput);
1.8 www 1061: $namespace=~s/\//\_/g;
1.1 albertel 1062: $namespace=~s/\W//g;
1063: chomp($what);
1064: my @queries=split(/\&/,$what);
1065: my $proname=propath($udom,$uname);
1066: my $qresult='';
1.20 www 1067: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1.1 albertel 1068: for ($i=0;$i<=$#queries;$i++) {
1069: $qresult.="$hash{$queries[$i]}&";
1070: }
1.4 www 1071: if (untie(%hash)) {
1.1 albertel 1072: $qresult=~s/\&$//;
1073: print $client "$qresult\n";
1074: } else {
1075: print $client "error:$!\n";
1076: }
1077: } else {
1078: print $client "error:$!\n";
1079: }
1080: # ------------------------------------------------------------------------ eget
1081: } elsif ($userinput =~ /^eget/) {
1082: my ($cmd,$udom,$uname,$namespace,$what)
1083: =split(/:/,$userinput);
1.8 www 1084: $namespace=~s/\//\_/g;
1.1 albertel 1085: $namespace=~s/\W//g;
1086: chomp($what);
1087: my @queries=split(/\&/,$what);
1088: my $proname=propath($udom,$uname);
1089: my $qresult='';
1.20 www 1090: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1.1 albertel 1091: for ($i=0;$i<=$#queries;$i++) {
1092: $qresult.="$hash{$queries[$i]}&";
1093: }
1.4 www 1094: if (untie(%hash)) {
1.1 albertel 1095: $qresult=~s/\&$//;
1096: if ($cipher) {
1097: my $cmdlength=length($qresult);
1098: $qresult.=" ";
1099: my $encqresult='';
1100: for
1101: (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
1102: $encqresult.=
1103: unpack("H16",
1104: $cipher->encrypt(substr($qresult,$encidx,8)));
1105: }
1106: print $client "enc:$cmdlength:$encqresult\n";
1107: } else {
1108: print $client "error:no_key\n";
1109: }
1110: } else {
1111: print $client "error:$!\n";
1112: }
1113: } else {
1114: print $client "error:$!\n";
1115: }
1116: # ------------------------------------------------------------------------- del
1117: } elsif ($userinput =~ /^del/) {
1118: my ($cmd,$udom,$uname,$namespace,$what)
1119: =split(/:/,$userinput);
1.8 www 1120: $namespace=~s/\//\_/g;
1.1 albertel 1121: $namespace=~s/\W//g;
1122: chomp($what);
1123: my $proname=propath($udom,$uname);
1124: my $now=time;
1.48 www 1125: unless ($namespace=~/^nohist\_/) {
1.1 albertel 1126: my $hfh;
1127: if (
1128: $hfh=IO::File->new(">>$proname/$namespace.hist")
1129: ) { print $hfh "D:$now:$what\n"; }
1130: }
1131: my @keys=split(/\&/,$what);
1.4 www 1132: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1.1 albertel 1133: foreach $key (@keys) {
1134: delete($hash{$key});
1135: }
1.4 www 1136: if (untie(%hash)) {
1.1 albertel 1137: print $client "ok\n";
1138: } else {
1139: print $client "error:$!\n";
1140: }
1141: } else {
1142: print $client "error:$!\n";
1143: }
1144: # ------------------------------------------------------------------------ keys
1145: } elsif ($userinput =~ /^keys/) {
1146: my ($cmd,$udom,$uname,$namespace)
1147: =split(/:/,$userinput);
1.8 www 1148: $namespace=~s/\//\_/g;
1.1 albertel 1149: $namespace=~s/\W//g;
1150: my $proname=propath($udom,$uname);
1151: my $qresult='';
1.20 www 1152: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1.1 albertel 1153: foreach $key (keys %hash) {
1154: $qresult.="$key&";
1155: }
1.4 www 1156: if (untie(%hash)) {
1.1 albertel 1157: $qresult=~s/\&$//;
1158: print $client "$qresult\n";
1159: } else {
1160: print $client "error:$!\n";
1161: }
1162: } else {
1163: print $client "error:$!\n";
1164: }
1165: # ------------------------------------------------------------------------ dump
1166: } elsif ($userinput =~ /^dump/) {
1.62 www 1167: my ($cmd,$udom,$uname,$namespace,$regexp)
1.1 albertel 1168: =split(/:/,$userinput);
1.8 www 1169: $namespace=~s/\//\_/g;
1.1 albertel 1170: $namespace=~s/\W//g;
1.62 www 1171: if (defined($regexp)) {
1172: $regexp=&unescape($regexp);
1173: } else {
1174: $regexp='.';
1175: }
1.1 albertel 1176: my $proname=propath($udom,$uname);
1177: my $qresult='';
1.20 www 1178: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1.1 albertel 1179: foreach $key (keys %hash) {
1.62 www 1180: if (eval('$key=~/$regexp/')) {
1181: $qresult.="$key=$hash{$key}&";
1182: }
1.7 www 1183: }
1184: if (untie(%hash)) {
1185: $qresult=~s/\&$//;
1186: print $client "$qresult\n";
1187: } else {
1188: print $client "error:$!\n";
1189: }
1190: } else {
1191: print $client "error:$!\n";
1192: }
1193: # ----------------------------------------------------------------------- store
1194: } elsif ($userinput =~ /^store/) {
1195: my ($cmd,$udom,$uname,$namespace,$rid,$what)
1196: =split(/:/,$userinput);
1.8 www 1197: $namespace=~s/\//\_/g;
1.7 www 1198: $namespace=~s/\W//g;
1199: if ($namespace ne 'roles') {
1200: chomp($what);
1201: my $proname=propath($udom,$uname);
1202: my $now=time;
1.48 www 1203: unless ($namespace=~/^nohist\_/) {
1.7 www 1204: my $hfh;
1205: if (
1206: $hfh=IO::File->new(">>$proname/$namespace.hist")
1207: ) { print $hfh "P:$now:$rid:$what\n"; }
1208: }
1209: my @pairs=split(/\&/,$what);
1210:
1211: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1212: my @previouskeys=split(/&/,$hash{"keys:$rid"});
1213: my $key;
1214: $hash{"version:$rid"}++;
1215: my $version=$hash{"version:$rid"};
1216: my $allkeys='';
1217: foreach $pair (@pairs) {
1218: ($key,$value)=split(/=/,$pair);
1219: $allkeys.=$key.':';
1220: $hash{"$version:$rid:$key"}=$value;
1221: }
1.36 www 1222: $hash{"$version:$rid:timestamp"}=$now;
1223: $allkeys.='timestamp';
1.7 www 1224: $hash{"$version:keys:$rid"}=$allkeys;
1225: if (untie(%hash)) {
1226: print $client "ok\n";
1227: } else {
1228: print $client "error:$!\n";
1229: }
1230: } else {
1231: print $client "error:$!\n";
1232: }
1233: } else {
1234: print $client "refused\n";
1235: }
1236: # --------------------------------------------------------------------- restore
1237: } elsif ($userinput =~ /^restore/) {
1238: my ($cmd,$udom,$uname,$namespace,$rid)
1239: =split(/:/,$userinput);
1.8 www 1240: $namespace=~s/\//\_/g;
1.7 www 1241: $namespace=~s/\W//g;
1242: chomp($rid);
1243: my $proname=propath($udom,$uname);
1244: my $qresult='';
1.20 www 1245: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1.7 www 1246: my $version=$hash{"version:$rid"};
1247: $qresult.="version=$version&";
1248: my $scope;
1249: for ($scope=1;$scope<=$version;$scope++) {
1250: my $vkeys=$hash{"$scope:keys:$rid"};
1251: my @keys=split(/:/,$vkeys);
1252: my $key;
1253: $qresult.="$scope:keys=$vkeys&";
1254: foreach $key (@keys) {
1.21 www 1255: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
1.7 www 1256: }
1.1 albertel 1257: }
1.4 www 1258: if (untie(%hash)) {
1.1 albertel 1259: $qresult=~s/\&$//;
1260: print $client "$qresult\n";
1261: } else {
1262: print $client "error:$!\n";
1263: }
1264: } else {
1265: print $client "error:$!\n";
1266: }
1.12 harris41 1267: # ------------------------------------------------------------------- querysend
1268: } elsif ($userinput =~ /^querysend/) {
1.44 harris41 1269: my ($cmd,$query,
1.82 www 1270: $arg1,$arg2,$arg3)=split(/\:/,$userinput);
1.12 harris41 1271: $query=~s/\n*$//g;
1.82 www 1272: print $client "".
1.40 harris41 1273: sqlreply("$hostid{$clientip}\&$query".
1.82 www 1274: "\&$arg1"."\&$arg2"."\&$arg3")."\n";
1.12 harris41 1275: # ------------------------------------------------------------------ queryreply
1276: } elsif ($userinput =~ /^queryreply/) {
1277: my ($cmd,$id,$reply)=split(/:/,$userinput);
1278: my $store;
1.13 www 1279: my $execdir=$perlvar{'lonDaemons'};
1280: if ($store=IO::File->new(">$execdir/tmp/$id")) {
1.43 harris41 1281: $reply=~s/\&/\n/g;
1.12 harris41 1282: print $store $reply;
1283: close $store;
1.46 harris41 1284: my $store2=IO::File->new(">$execdir/tmp/$id.end");
1285: print $store2 "done\n";
1286: close $store2;
1.12 harris41 1287: print $client "ok\n";
1288: }
1289: else {
1290: print $client "error:$!\n";
1291: }
1.1 albertel 1292: # ----------------------------------------------------------------------- idput
1293: } elsif ($userinput =~ /^idput/) {
1294: my ($cmd,$udom,$what)=split(/:/,$userinput);
1295: chomp($what);
1296: $udom=~s/\W//g;
1297: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
1298: my $now=time;
1299: {
1300: my $hfh;
1301: if (
1302: $hfh=IO::File->new(">>$proname.hist")
1303: ) { print $hfh "P:$now:$what\n"; }
1304: }
1305: my @pairs=split(/\&/,$what);
1.4 www 1306: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT,0640)) {
1.1 albertel 1307: foreach $pair (@pairs) {
1308: ($key,$value)=split(/=/,$pair);
1309: $hash{$key}=$value;
1310: }
1.4 www 1311: if (untie(%hash)) {
1.1 albertel 1312: print $client "ok\n";
1313: } else {
1314: print $client "error:$!\n";
1315: }
1316: } else {
1317: print $client "error:$!\n";
1318: }
1319: # ----------------------------------------------------------------------- idget
1320: } elsif ($userinput =~ /^idget/) {
1321: my ($cmd,$udom,$what)=split(/:/,$userinput);
1322: chomp($what);
1323: $udom=~s/\W//g;
1324: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
1325: my @queries=split(/\&/,$what);
1326: my $qresult='';
1.20 www 1327: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER,0640)) {
1.1 albertel 1328: for ($i=0;$i<=$#queries;$i++) {
1329: $qresult.="$hash{$queries[$i]}&";
1330: }
1.4 www 1331: if (untie(%hash)) {
1.1 albertel 1332: $qresult=~s/\&$//;
1333: print $client "$qresult\n";
1334: } else {
1335: print $client "error:$!\n";
1336: }
1337: } else {
1338: print $client "error:$!\n";
1339: }
1.13 www 1340: # ---------------------------------------------------------------------- tmpput
1341: } elsif ($userinput =~ /^tmpput/) {
1342: my ($cmd,$what)=split(/:/,$userinput);
1343: my $store;
1344: $tmpsnum++;
1345: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
1346: $id=~s/\W/\_/g;
1347: $what=~s/\n//g;
1348: my $execdir=$perlvar{'lonDaemons'};
1349: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
1350: print $store $what;
1351: close $store;
1352: print $client "$id\n";
1353: }
1354: else {
1355: print $client "error:$!\n";
1356: }
1357:
1358: # ---------------------------------------------------------------------- tmpget
1359: } elsif ($userinput =~ /^tmpget/) {
1360: my ($cmd,$id)=split(/:/,$userinput);
1361: chomp($id);
1362: $id=~s/\W/\_/g;
1363: my $store;
1364: my $execdir=$perlvar{'lonDaemons'};
1365: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
1366: my $reply=<$store>;
1367: print $client "$reply\n";
1368: close $store;
1369: }
1370: else {
1371: print $client "error:$!\n";
1372: }
1373:
1.5 www 1374: # -------------------------------------------------------------------------- ls
1375: } elsif ($userinput =~ /^ls/) {
1376: my ($cmd,$ulsdir)=split(/:/,$userinput);
1377: my $ulsout='';
1378: my $ulsfn;
1379: if (-e $ulsdir) {
1.83 stredwic 1380: if(-d $ulsdir) {
1381: if (opendir(LSDIR,$ulsdir)) {
1382: while ($ulsfn=readdir(LSDIR)) {
1383: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1384: $ulsout.=$ulsfn.'&'.
1385: join('&',@ulsstats).':';
1386: }
1387: closedir(LSDIR);
1388: }
1389: } else {
1390: my @ulsstats=stat($ulsdir);
1391: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1392: }
1393: } else {
1.5 www 1394: $ulsout='no_such_dir';
1395: }
1.17 www 1396: if ($ulsout eq '') { $ulsout='empty'; }
1.5 www 1397: print $client "$ulsout\n";
1.51 www 1398: # ------------------------------------------------------------------ Hanging up
1399: } elsif (($userinput =~ /^exit/) ||
1400: ($userinput =~ /^init/)) {
1401: &logthis(
1402: "Client $clientip ($hostid{$clientip}) hanging up: $userinput");
1403: print $client "bye\n";
1.59 www 1404: $client->close();
1.51 www 1405: last;
1.1 albertel 1406: # ------------------------------------------------------------- unknown command
1407: } else {
1408: # unknown command
1409: print $client "unknown_cmd\n";
1410: }
1.58 www 1411: # -------------------------------------------------------------------- complete
1.63 www 1412: alarm(0);
1.58 www 1413: &status('Listening to '.$hostid{$clientip});
1414: }
1.59 www 1415: # --------------------------------------------- client unknown or fishy, refuse
1.1 albertel 1416: } else {
1417: print $client "refused\n";
1.59 www 1418: $client->close();
1.9 www 1419: &logthis("<font color=blue>WARNING: "
1420: ."Rejected client $clientip, closing connection</font>");
1.75 foxr 1421: }
1422: }
1423:
1.1 albertel 1424: # =============================================================================
1.75 foxr 1425:
1426: &logthis("<font color=red>CRITICAL: "
1427: ."Disconnect from $clientip ($hostid{$clientip})</font>");
1.1 albertel 1428: # tidy up gracefully and finish
1429:
1.59 www 1430: $server->close();
1431:
1.1 albertel 1432: # this exit is VERY important, otherwise the child will become
1433: # a producer of more and more children, forking yourself into
1434: # process death.
1435: exit;
1436: }
1.78 foxr 1437: }
1438:
1439:
1440: #
1441: # Checks to see if the input roleput request was to set
1442: # an author role. If so, invokes the lchtmldir script to set
1443: # up a correct public_html
1444: # Parameters:
1445: # request - The request sent to the rolesput subchunk.
1446: # We're looking for /domain/_au
1447: # domain - The domain in which the user is having roles doctored.
1448: # user - Name of the user for which the role is being put.
1449: # authtype - The authentication type associated with the user.
1450: #
1451: sub ManagePermissions
1452: {
1453: my $request = shift;
1454: my $domain = shift;
1455: my $user = shift;
1456: my $authtype= shift;
1457:
1458: # See if the request is of the form /$domain/_au
1459:
1460: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
1461: my $execdir = $perlvar{'lonDaemons'};
1462: my $userhome= "/home/$user" ;
1463: Debug("system $execdir/lchtmldir $userhome $system $authtype");
1464: system("$execdir/lchtmldir $userhome $user $authtype");
1465: }
1466: }
1467: #
1468: # GetAuthType - Determines the authorization type of a user in a domain.
1469:
1470: # Returns the authorization type or nouser if there is no such user.
1471: #
1472: sub GetAuthType
1473: {
1474: my $domain = shift;
1475: my $user = shift;
1476:
1.79 foxr 1477: Debug("GetAuthType( $domain, $user ) \n");
1.78 foxr 1478: my $proname = &propath($domain, $user);
1479: my $passwdfile = "$proname/passwd";
1480: if( -e $passwdfile ) {
1481: my $pf = IO::File->new($passwdfile);
1482: my $realpassword = <$pf>;
1483: chomp($realpassword);
1.79 foxr 1484: Debug("Password info = $realpassword\n");
1.78 foxr 1485: my ($authtype, $contentpwd) = split(/:/, $realpassword);
1.79 foxr 1486: Debug("Authtype = $authtype, content = $contentpwd\n");
1.78 foxr 1487: my $availinfo = '';
1488: if($authtype eq 'krb4') {
1489: $availinfo = $contentpwd;
1490: }
1.79 foxr 1491:
1.78 foxr 1492: return "$authtype:$availinfo";
1493: }
1494: else {
1.79 foxr 1495: Debug("Returning nouser");
1.78 foxr 1496: return "nouser";
1497: }
1.1 albertel 1498: }
1499:
1.84 albertel 1500: sub addline {
1501: my ($fname,$hostid,$ip,$newline)=@_;
1502: my $contents;
1503: my $found=0;
1504: my $expr='^'.$hostid.':'.$ip.':';
1505: $expr =~ s/\./\\\./g;
1506: if ($sh=IO::File->new("$fname.subscription")) {
1507: while (my $subline=<$sh>) {
1508: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
1509: }
1510: $sh->close();
1511: }
1512: $sh=IO::File->new(">$fname.subscription");
1513: if ($contents) { print $sh $contents; }
1514: if ($newline) { print $sh $newline; }
1515: $sh->close();
1516: return $found;
1517: }
1518:
1519: sub unsub {
1520: my ($fname,$clientip)=@_;
1521: my $result;
1522: if (unlink("$fname.$hostid{$clientip}")) {
1523: $result="ok\n";
1524: } else {
1525: $result="not_subscribed\n";
1526: }
1527: if (-e "$fname.subscription") {
1528: my $found=&addline($fname,$hostid{$clientip},$clientip,'');
1529: if ($found) { $result="ok\n"; }
1530: } else {
1531: if ($result != "ok\n") { $result="not_subscribed\n"; }
1532: }
1533: return $result;
1534: }
1535:
1536: sub subscribe {
1537: my ($userinput,$clientip)=@_;
1538: my $result;
1539: my ($cmd,$fname)=split(/:/,$userinput);
1540: my $ownership=&ishome($fname);
1541: if ($ownership eq 'owner') {
1542: if (-e $fname) {
1543: if (-d $fname) {
1544: $result="directory\n";
1545: } else {
1546: if (-e "$fname.$hostid{$clientip}") {&unsub($fname,$clientip);}
1547: $now=time;
1548: my $found=&addline($fname,$hostid{$clientip},$clientip,
1549: "$hostid{$clientip}:$clientip:$now\n");
1550: if ($found) { $result="$fname\n"; }
1551: # if they were subscribed to only meta data, delete that
1552: # subscription, when you subscribe to a file you also get
1553: # the metadata
1554: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
1555: $fname=~s/\/home\/httpd\/html\/res/raw/;
1556: $fname="http://$thisserver/".$fname;
1557: $result="$fname\n";
1558: }
1559: } else {
1560: $result="not_found\n";
1561: }
1562: } else {
1563: $result="rejected\n";
1564: }
1565: return $result;
1566: }
1.61 harris41 1567: # ----------------------------------- POD (plain old documentation, CPAN style)
1568:
1569: =head1 NAME
1570:
1571: lond - "LON Daemon" Server (port "LOND" 5663)
1572:
1573: =head1 SYNOPSIS
1574:
1.74 harris41 1575: Usage: B<lond>
1576:
1577: Should only be run as user=www. This is a command-line script which
1578: is invoked by B<loncron>. There is no expectation that a typical user
1579: will manually start B<lond> from the command-line. (In other words,
1580: DO NOT START B<lond> YOURSELF.)
1.61 harris41 1581:
1582: =head1 DESCRIPTION
1583:
1.74 harris41 1584: There are two characteristics associated with the running of B<lond>,
1585: PROCESS MANAGEMENT (starting, stopping, handling child processes)
1586: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
1587: subscriptions, etc). These are described in two large
1588: sections below.
1589:
1590: B<PROCESS MANAGEMENT>
1591:
1.61 harris41 1592: Preforker - server who forks first. Runs as a daemon. HUPs.
1593: Uses IDEA encryption
1594:
1.74 harris41 1595: B<lond> forks off children processes that correspond to the other servers
1596: in the network. Management of these processes can be done at the
1597: parent process level or the child process level.
1598:
1599: B<logs/lond.log> is the location of log messages.
1600:
1601: The process management is now explained in terms of linux shell commands,
1602: subroutines internal to this code, and signal assignments:
1603:
1604: =over 4
1605:
1606: =item *
1607:
1608: PID is stored in B<logs/lond.pid>
1609:
1610: This is the process id number of the parent B<lond> process.
1611:
1612: =item *
1613:
1614: SIGTERM and SIGINT
1615:
1616: Parent signal assignment:
1617: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
1618:
1619: Child signal assignment:
1620: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
1621: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
1622: to restart a new child.)
1623:
1624: Command-line invocations:
1625: B<kill> B<-s> SIGTERM I<PID>
1626: B<kill> B<-s> SIGINT I<PID>
1627:
1628: Subroutine B<HUNTSMAN>:
1629: This is only invoked for the B<lond> parent I<PID>.
1630: This kills all the children, and then the parent.
1631: The B<lonc.pid> file is cleared.
1632:
1633: =item *
1634:
1635: SIGHUP
1636:
1637: Current bug:
1638: This signal can only be processed the first time
1639: on the parent process. Subsequent SIGHUP signals
1640: have no effect.
1641:
1642: Parent signal assignment:
1643: $SIG{HUP} = \&HUPSMAN;
1644:
1645: Child signal assignment:
1646: none (nothing happens)
1647:
1648: Command-line invocations:
1649: B<kill> B<-s> SIGHUP I<PID>
1650:
1651: Subroutine B<HUPSMAN>:
1652: This is only invoked for the B<lond> parent I<PID>,
1653: This kills all the children, and then the parent.
1654: The B<lond.pid> file is cleared.
1655:
1656: =item *
1657:
1658: SIGUSR1
1659:
1660: Parent signal assignment:
1661: $SIG{USR1} = \&USRMAN;
1662:
1663: Child signal assignment:
1664: $SIG{USR1}= \&logstatus;
1665:
1666: Command-line invocations:
1667: B<kill> B<-s> SIGUSR1 I<PID>
1668:
1669: Subroutine B<USRMAN>:
1670: When invoked for the B<lond> parent I<PID>,
1671: SIGUSR1 is sent to all the children, and the status of
1672: each connection is logged.
1673:
1674: =item *
1675:
1676: SIGCHLD
1677:
1678: Parent signal assignment:
1679: $SIG{CHLD} = \&REAPER;
1680:
1681: Child signal assignment:
1682: none
1683:
1684: Command-line invocations:
1685: B<kill> B<-s> SIGCHLD I<PID>
1686:
1687: Subroutine B<REAPER>:
1688: This is only invoked for the B<lond> parent I<PID>.
1689: Information pertaining to the child is removed.
1690: The socket port is cleaned up.
1691:
1692: =back
1693:
1694: B<SERVER-SIDE ACTIVITIES>
1695:
1696: Server-side information can be accepted in an encrypted or non-encrypted
1697: method.
1698:
1699: =over 4
1700:
1701: =item ping
1702:
1703: Query a client in the hosts.tab table; "Are you there?"
1704:
1705: =item pong
1706:
1707: Respond to a ping query.
1708:
1709: =item ekey
1710:
1711: Read in encrypted key, make cipher. Respond with a buildkey.
1712:
1713: =item load
1714:
1715: Respond with CPU load based on a computation upon /proc/loadavg.
1716:
1717: =item currentauth
1718:
1719: Reply with current authentication information (only over an
1720: encrypted channel).
1721:
1722: =item auth
1723:
1724: Only over an encrypted channel, reply as to whether a user's
1725: authentication information can be validated.
1726:
1727: =item passwd
1728:
1729: Allow for a password to be set.
1730:
1731: =item makeuser
1732:
1733: Make a user.
1734:
1735: =item passwd
1736:
1737: Allow for authentication mechanism and password to be changed.
1738:
1739: =item home
1.61 harris41 1740:
1.74 harris41 1741: Respond to a question "are you the home for a given user?"
1742:
1743: =item update
1744:
1745: Update contents of a subscribed resource.
1746:
1747: =item unsubscribe
1748:
1749: The server is unsubscribing from a resource.
1750:
1751: =item subscribe
1752:
1753: The server is subscribing to a resource.
1754:
1755: =item log
1756:
1757: Place in B<logs/lond.log>
1758:
1759: =item put
1760:
1761: stores hash in namespace
1762:
1763: =item rolesput
1764:
1765: put a role into a user's environment
1766:
1767: =item get
1768:
1769: returns hash with keys from array
1770: reference filled in from namespace
1771:
1772: =item eget
1773:
1774: returns hash with keys from array
1775: reference filled in from namesp (encrypts the return communication)
1776:
1777: =item rolesget
1778:
1779: get a role from a user's environment
1780:
1781: =item del
1782:
1783: deletes keys out of array from namespace
1784:
1785: =item keys
1786:
1787: returns namespace keys
1788:
1789: =item dump
1790:
1791: dumps the complete (or key matching regexp) namespace into a hash
1792:
1793: =item store
1794:
1795: stores hash permanently
1796: for this url; hashref needs to be given and should be a \%hashname; the
1797: remaining args aren't required and if they aren't passed or are '' they will
1798: be derived from the ENV
1799:
1800: =item restore
1801:
1802: returns a hash for a given url
1803:
1804: =item querysend
1805:
1806: Tells client about the lonsql process that has been launched in response
1807: to a sent query.
1808:
1809: =item queryreply
1810:
1811: Accept information from lonsql and make appropriate storage in temporary
1812: file space.
1813:
1814: =item idput
1815:
1816: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
1817: for each student, defined perhaps by the institutional Registrar.)
1818:
1819: =item idget
1820:
1821: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
1822: for each student, defined perhaps by the institutional Registrar.)
1823:
1824: =item tmpput
1825:
1826: Accept and store information in temporary space.
1827:
1828: =item tmpget
1829:
1830: Send along temporarily stored information.
1831:
1832: =item ls
1833:
1834: List part of a user's directory.
1835:
1836: =item Hanging up (exit or init)
1837:
1838: What to do when a client tells the server that they (the client)
1839: are leaving the network.
1840:
1841: =item unknown command
1842:
1843: If B<lond> is sent an unknown command (not in the list above),
1844: it replys to the client "unknown_cmd".
1845:
1846: =item UNKNOWN CLIENT
1847:
1848: If the anti-spoofing algorithm cannot verify the client,
1849: the client is rejected (with a "refused" message sent
1850: to the client, and the connection is closed.
1851:
1852: =back
1.61 harris41 1853:
1854: =head1 PREREQUISITES
1855:
1856: IO::Socket
1857: IO::File
1858: Apache::File
1859: Symbol
1860: POSIX
1861: Crypt::IDEA
1862: LWP::UserAgent()
1863: GDBM_File
1864: Authen::Krb4
1865:
1866: =head1 COREQUISITES
1867:
1868: =head1 OSNAMES
1869:
1870: linux
1871:
1872: =head1 SCRIPT CATEGORIES
1873:
1874: Server/Process
1875:
1876: =cut
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