1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.88 2002/08/09 17:43:30 albertel 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: # 06/26 Scott Harrison
35: # 06/29,06/30,07/14,07/15,07/17,07/20,07/25,09/18 Gerd Kortemeyer
36: # 12/05 Scott Harrison
37: # 12/05,12/13,12/29 Gerd Kortemeyer
38: # YEAR=2001
39: # Jan 01 Scott Harrison
40: # 02/12 Gerd Kortemeyer
41: # 03/15 Scott Harrison
42: # 03/24 Gerd Kortemeyer
43: # 04/02 Scott Harrison
44: # 05/11,05/28,08/30 Gerd Kortemeyer
45: # 9/30,10/22,11/13,11/15,11/16 Scott Harrison
46: # 11/26,11/27 Gerd Kortemeyer
47: # 12/20 Scott Harrison
48: # 12/22 Gerd Kortemeyer
49: # YEAR=2002
50: # 01/20/02,02/05 Gerd Kortemeyer
51: # 02/05 Guy Albertelli
52: # 02/07 Scott Harrison
53: # 02/12 Gerd Kortemeyer
54: # 02/19 Matthew Hall
55: # 02/25 Gerd Kortemeyer
56: # 05/11 Scott Harrison
57: ###
58:
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:
65: use lib '/home/httpd/lib/perl/';
66: use LONCAPA::Configuration;
67:
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();
75: use GDBM_File;
76: use Authen::Krb4;
77: use lib '/home/httpd/lib/perl/';
78: use localauth;
79:
80: my $DEBUG = 0; # Non zero to enable debug log entries.
81:
82: my $status='';
83: my $lastlog='';
84:
85: # grabs exception and records it to log before exiting
86: sub catchexception {
87: my ($error)=@_;
88: $SIG{'QUIT'}='DEFAULT';
89: $SIG{__DIE__}='DEFAULT';
90: &logthis("<font color=red>CRITICAL: "
91: ."ABNORMAL EXIT. Child $$ for server $wasserver died through "
92: ."a crash with this error msg->[$error]</font>");
93: &logthis('Famous last words: '.$status.' - '.$lastlog);
94: if ($client) { print $client "error: $error\n"; }
95: $server->close();
96: die($error);
97: }
98:
99: sub timeout {
100: &logthis("<font color=ref>CRITICAL: TIME OUT ".$$."</font>");
101: &catchexception('Timeout');
102: }
103: # -------------------------------- Set signal handlers to record abnormal exits
104:
105: $SIG{'QUIT'}=\&catchexception;
106: $SIG{__DIE__}=\&catchexception;
107:
108: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
109: &status("Read loncapa_apache.conf and loncapa.conf");
110: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa_apache.conf',
111: 'loncapa.conf');
112: my %perlvar=%{$perlvarref};
113: undef $perlvarref;
114:
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";
120: system("echo 'User ID mismatch. lond must be run as user www.' |\
121: mailto $emailto -s '$subj' > /dev/null");
122: exit 1;
123: }
124:
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);
133: if (kill 0 => $pide) { die "already running"; }
134: }
135:
136: $PREFORK=4; # number of children to maintain, at least four spare
137:
138: # ------------------------------------------------------------- Read hosts file
139:
140: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
141:
142: while ($configline=<CONFIG>) {
143: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
144: chomp($ip); $ip=~s/\D+$//;
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 )
157: or die "making socket: $@\n";
158:
159: # --------------------------------------------------------- Do global variables
160:
161: # global variables
162:
163: $MAX_CLIENTS_PER_CHILD = 50; # number of clients each child should
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 $pid = wait;
171: if (defined($children{$pid})) {
172: &logthis("Child $pid died");
173: $children --;
174: delete $children{$pid};
175: } else {
176: &logthis("Unknown Child $pid died");
177: }
178: }
179:
180: sub HUNTSMAN { # signal handler for SIGINT
181: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
182: kill 'INT' => keys %children;
183: &logthis("Free socket: ".shutdown($server,2)); # free up socket
184: my $execdir=$perlvar{'lonDaemons'};
185: unlink("$execdir/logs/lond.pid");
186: &logthis("<font color=red>CRITICAL: Shutting down</font>");
187: exit; # clean up with dignity
188: }
189:
190: sub HUPSMAN { # signal handler for SIGHUP
191: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
192: kill 'INT' => keys %children;
193: &logthis("Free socket: ".shutdown($server,2)); # free up socket
194: &logthis("<font color=red>CRITICAL: Restarting</font>");
195: unlink("$execdir/logs/lond.pid");
196: my $execdir=$perlvar{'lonDaemons'};
197: exec("$execdir/lond"); # here we go again
198: }
199:
200: sub checkchildren {
201: &initnewstatus();
202: &logstatus();
203: &logthis('Going to check on the children');
204: $docdir=$perlvar{'lonDocRoot'};
205: foreach (sort keys %children) {
206: sleep 1;
207: unless (kill 'USR1' => $_) {
208: &logthis ('Child '.$_.' is dead');
209: &logstatus($$.' is dead');
210: }
211: }
212: sleep 5;
213: foreach (sort keys %children) {
214: unless (-e "$docdir/lon-status/londchld/$_.txt") {
215: &logthis('Child '.$_.' did not respond');
216: kill 9 => $_;
217: $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
218: $subj="LON: $perlvar{'lonHostID'} killed lond process $_";
219: my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
220: $execdir=$perlvar{'lonDaemons'};
221: $result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`
222: }
223: }
224: }
225:
226: # --------------------------------------------------------------------- Logging
227:
228: sub logthis {
229: my $message=shift;
230: my $execdir=$perlvar{'lonDaemons'};
231: my $fh=IO::File->new(">>$execdir/logs/lond.log");
232: my $now=time;
233: my $local=localtime($now);
234: $lastlog=$local.': '.$message;
235: print $fh "$local ($$): $message\n";
236: }
237:
238: # ------------------------- Conditional log if $DEBUG true.
239: sub Debug {
240: my $message = shift;
241: if($DEBUG) {
242: &logthis($message);
243: }
244: }
245: # ------------------------------------------------------------------ Log status
246:
247: sub logstatus {
248: my $docdir=$perlvar{'lonDocRoot'};
249: {
250: my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");
251: print $fh $$."\t".$status."\t".$lastlog."\n";
252: $fh->close();
253: }
254: {
255: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
256: print $fh $status."\n".$lastlog."\n".time;
257: $fh->close();
258: }
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";
267: opendir(DIR,"$docdir/lon-status/londchld");
268: while ($filename=readdir(DIR)) {
269: unlink("$docdir/lon-status/londchld/$filename");
270: }
271: closedir(DIR);
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: }
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:
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;
311: sleep 5;
312: if (-e "$peerfile") { return; }
313: &logthis("$peerfile still not there, give it another try");
314: sleep 10;
315: if (-e "$peerfile") { return; }
316: &logthis(
317: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
318: } else {
319: &logthis(
320: "<font color=red>CRITICAL: "
321: ."lonc at pid $loncpid not responding, giving up</font>");
322: }
323: } else {
324: &logthis('<font color=red>CRITICAL: lonc not running, giving up</font>');
325: }
326: }
327:
328: # -------------------------------------------------- Non-critical communication
329:
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) {
352: &logthis("sub reply: answer != server");
353: &reconlonc("$perlvar{'lonSockDir'}/$server");
354: }
355: $answer=subreply($cmd,$server);
356: }
357: } else {
358: $answer='self_reply';
359: }
360: return $answer;
361: }
362:
363: # -------------------------------------------------------------- Talk to lonsql
364:
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:
387: # -------------------------------------------- Return path to profile directory
388:
389: sub propath {
390: my ($udom,$uname)=@_;
391: $udom=~s/\W//g;
392: $uname=~s/\W//g;
393: my $subdir=$uname.'__';
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?
400:
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;
418: die "Couldn't fork: $!" unless defined ($fpid);
419:
420: POSIX::setsid() or die "Can't start new session: $!";
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);
428: &logthis("<font color=red>CRITICAL: ---------- Starting ----------</font>");
429: &status('Starting');
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:
440: &status('Forked children');
441:
442: $SIG{CHLD} = \&REAPER;
443: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
444: $SIG{HUP} = \&HUPSMAN;
445: $SIG{USR1} = \&checkchildren;
446:
447: # And maintain the population.
448: while (1) {
449: &status('Sleeping');
450: sleep; # wait for a signal (i.e., child's death)
451: &logthis('Woke up');
452: &status('Woke up');
453: for ($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)
466: or die "Can't block SIGINT for fork: $!\n";
467:
468: die "fork: $!" unless defined ($pid = fork);
469:
470: if ($pid) {
471: # Parent records the child's birth and returns.
472: sigprocmask(SIG_UNBLOCK, $sigset)
473: or die "Can't unblock SIGINT for fork: $!\n";
474: $children{$pid} = 1;
475: $children++;
476: &status('Started child '.$pid);
477: return;
478: } else {
479: # Child can *not* return from this subroutine.
480: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
481: $SIG{USR1}= \&logstatus;
482: $SIG{ALRM}= \&timeout;
483: $lastlog='Forked ';
484: $status='Forked';
485:
486: # unblock signals
487: sigprocmask(SIG_UNBLOCK, $sigset)
488: or die "Can't unblock SIGINT for fork: $!\n";
489:
490: $tmpsnum=0;
491:
492: # handle connections until we've reached $MAX_CLIENTS_PER_CHILD
493: for ($i=0; $i < $MAX_CLIENTS_PER_CHILD; $i++) {
494: &status('Idle, waiting for connection');
495: $client = $server->accept() or last;
496: &status('Accepted connection');
497: # =============================================================================
498: # do something with the connection
499: # -----------------------------------------------------------------------------
500: # see if we know client and check for spoof IP by challenge
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);
505: &logthis(
506: "<font color=yellow>INFO: Connection $i, $clientip ($hostid{$clientip})</font>"
507: );
508: &status("Connecting $clientip ($hostid{$clientip})");
509: my $clientok;
510: if ($clientrec) {
511: &status("Waiting for init from $clientip ($hostid{$clientip})");
512: my $remotereq=<$client>;
513: $remotereq=~s/\W//g;
514: if ($remotereq eq 'init') {
515: my $challenge="$$".time;
516: print $client "$challenge\n";
517: &status(
518: "Waiting for challenge reply from $clientip ($hostid{$clientip})");
519: $remotereq=<$client>;
520: $remotereq=~s/\W//g;
521: if ($challenge eq $remotereq) {
522: $clientok=1;
523: print $client "ok\n";
524: } else {
525: &logthis(
526: "<font color=blue>WARNING: $clientip did not reply challenge</font>");
527: &status('No challenge reply '.$clientip);
528: }
529: } else {
530: &logthis(
531: "<font color=blue>WARNING: "
532: ."$clientip failed to initialize: >$remotereq< </font>");
533: &status('No init '.$clientip);
534: }
535: } else {
536: &logthis(
537: "<font color=blue>WARNING: Unknown client $clientip</font>");
538: &status('Hung up on '.$clientip);
539: }
540: if ($clientok) {
541: # ---------------- New known client connecting, could mean machine online again
542:
543: &reconlonc("$perlvar{'lonSockDir'}/$hostid{$clientip}");
544: &logthis(
545: "<font color=green>Established connection: $hostid{$clientip}</font>");
546: &status('Will listen to '.$hostid{$clientip});
547: # ------------------------------------------------------------ Process requests
548: while (my $userinput=<$client>) {
549: chomp($userinput);
550: Debug("Request = $userinput\n");
551: &status('Processing '.$hostid{$clientip}.': '.$userinput);
552: my $wasenc=0;
553: alarm(120);
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: }
568: }
569:
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";
602: # ----------------------------------------------------------------- currentauth
603: } elsif ($userinput =~ /^currentauth/) {
604: if ($wasenc==1) {
605: my ($cmd,$udom,$uname)=split(/:/,$userinput);
606: my $result = GetAuthType($udom, $uname);
607: if($result eq "nouser") {
608: print $client "unknown_user\n";
609: }
610: else {
611: print $client "$result\n"
612: }
613: } else {
614: print $client "refused\n";
615: }
616: # ------------------------------------------------------------------------ auth
617: } elsif ($userinput =~ /^auth/) {
618: if ($wasenc==1) {
619: my ($cmd,$udom,$uname,$upass)=split(/:/,$userinput);
620: chomp($upass);
621: $upass=unescape($upass);
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($realpasswd);
628: my ($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];
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: }
647: } elsif ($howpwd eq 'krb4') {
648: $null=pack("C",0);
649: unless ($upass=~/$null/) {
650: $pwdcorrect=(
651: Authen::Krb4::get_pw_in_tkt($uname,"",
652: $contentpwd,'krbtgt',$contentpwd,1,
653: $upass) == 0);
654: } else { $pwdcorrect=0; }
655: } elsif ($howpwd eq 'localauth') {
656: $pwdcorrect=&localauth::localauth($uname,$upass,
657: $contentpwd);
658: }
659: if ($pwdcorrect) {
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);
676: $upass=&unescape($upass);
677: $npass=&unescape($npass);
678: &logthis("Trying to change password for $uname");
679: my $proname=propath($udom,$uname);
680: my $passfilename="$proname/passwd";
681: if (-e $passfilename) {
682: my $realpasswd;
683: { my $pf = IO::File->new($passfilename);
684: $realpasswd=<$pf>; }
685: chomp($realpasswd);
686: my ($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);
692: { my $pf = IO::File->new(">$passfilename");
693: print $pf "internal:$ncpass\n"; }
694: &logthis("Result of password change for $uname: pwchange_success");
695: print $client "ok\n";
696: } else {
697: print $client "non_authorized\n";
698: }
699: } elsif ($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 {
730: print $client "auth_mode_error\n";
731: }
732: } else {
733: print $client "unknown_user\n";
734: }
735: } else {
736: print $client "refused\n";
737: }
738: # -------------------------------------------------------------------- makeuser
739: } elsif ($userinput =~ /^makeuser/) {
740: Debug("Make user received");
741: my $oldumask=umask(0077);
742: if ($wasenc==1) {
743: my
744: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
745: &Debug("cmd =".$cmd." $udom =".$udom.
746: " uname=".$uname);
747: chomp($npass);
748: $npass=&unescape($npass);
749: my $proname=propath($udom,$uname);
750: my $passfilename="$proname/passwd";
751: &Debug("Password file created will be:".
752: $passfilename);
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)) {
765: $fperror="error:$!";
766: }
767: }
768: }
769: unless ($fperror) {
770: if ($umode eq 'krb4') {
771: {
772: my $pf = IO::File->new(">$passfilename");
773: print $pf "krb4:$npass\n";
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: {
781: &Debug("Creating internal auth");
782: my $pf = IO::File->new(">$passfilename");
783: print $pf "internal:$ncpass\n";
784: }
785: print $client "ok\n";
786: } elsif ($umode eq 'localauth') {
787: {
788: my $pf = IO::File->new(">$passfilename");
789: print $pf "localauth:$npass\n";
790: }
791: print $client "ok\n";
792: } elsif ($umode eq 'unix') {
793: {
794: my $execpath="$perlvar{'lonDaemons'}/".
795: "lcuseradd";
796: {
797: &Debug("Executing external: ".
798: $execpath);
799: my $se = IO::File->new("|$execpath");
800: print $se "$uname\n";
801: print $se "$npass\n";
802: print $se "$npass\n";
803: }
804: my $pf = IO::File->new(">$passfilename");
805: print $pf "unix:\n";
806: }
807: print $client "ok\n";
808: } elsif ($umode eq 'none') {
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: }
820: }
821: } else {
822: print $client "refused\n";
823: }
824: umask($oldumask);
825: # -------------------------------------------------------------- changeuserauth
826: } elsif ($userinput =~ /^changeuserauth/) {
827: &Debug("Changing authorization");
828: if ($wasenc==1) {
829: my
830: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
831: chomp($npass);
832: &Debug("cmd = ".$cmd." domain= ".$udom.
833: "uname =".$uname." umode= ".$umode);
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: }
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 ($response->is_error()) {
925: unlink($transname);
926: my $message=$response->status_line;
927: &logthis(
928: "LWP GET: $message for $fname ($remoteurl)");
929: } else {
930: if ($remoteurl!~/\.meta$/) {
931: my $ua=new LWP::UserAgent;
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($fname.'.meta');
938: }
939: }
940: rename($transname,$fname);
941: }
942: }
943: print $client "ok\n";
944: } else {
945: print $client "not_found\n";
946: }
947: } else {
948: print $client "rejected\n";
949: }
950: # -------------------------------------- fetch a user file from a remote server
951: } elsif ($userinput =~ /^fetchuserfile/) {
952: my ($cmd,$fname)=split(/:/,$userinput);
953: my ($udom,$uname,$ufile)=split(/\//,$fname);
954: my $udir=propath($udom,$uname).'/userfiles';
955: unless (-e $udir) { mkdir($udir,0770); }
956: if (-e $udir) {
957: $ufile=~s/^[\.\~]+//;
958: $ufile=~s/\///g;
959: my $transname=$udir.'/'.$ufile;
960: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
961: my $response;
962: {
963: my $ua=new LWP::UserAgent;
964: my $request=new HTTP::Request('GET',"$remoteurl");
965: $response=$ua->request($request,$transname);
966: }
967: if ($response->is_error()) {
968: unlink($transname);
969: my $message=$response->status_line;
970: &logthis(
971: "LWP GET: $message for $fname ($remoteurl)");
972: print $client "failed\n";
973: } else {
974: print $client "ok\n";
975: }
976: } else {
977: print $client "not_home\n";
978: }
979: # ------------------------------------------ authenticate access to a user file
980: } elsif ($userinput =~ /^tokenauthuserfile/) {
981: my ($cmd,$fname,$session)=split(/:/,$userinput);
982: chomp($session);
983: $reply='non_auth';
984: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
985: $session.'.id')) {
986: while ($line=<ENVIN>) {
987: if ($line=~/userfile\.$fname\=/) { $reply='ok'; }
988: }
989: close(ENVIN);
990: print $client $reply."\n";
991: } else {
992: print $client "invalid_token\n";
993: }
994: # ----------------------------------------------------------------- unsubscribe
995: } elsif ($userinput =~ /^unsub/) {
996: my ($cmd,$fname)=split(/:/,$userinput);
997: if (-e $fname) {
998: print $client &unsub($client,$fname,$clientip);
999: } else {
1000: print $client "not_found\n";
1001: }
1002: # ------------------------------------------------------------------- subscribe
1003: } elsif ($userinput =~ /^sub/) {
1004: print $client &subscribe($userinput,$clientip);
1005: # ------------------------------------------------------------------------- log
1006: } elsif ($userinput =~ /^log/) {
1007: my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
1008: chomp($what);
1009: my $proname=propath($udom,$uname);
1010: my $now=time;
1011: {
1012: my $hfh;
1013: if ($hfh=IO::File->new(">>$proname/activity.log")) {
1014: print $hfh "$now:$hostid{$clientip}:$what\n";
1015: print $client "ok\n";
1016: } else {
1017: print $client "error:$!\n";
1018: }
1019: }
1020: # ------------------------------------------------------------------------- put
1021: } elsif ($userinput =~ /^put/) {
1022: my ($cmd,$udom,$uname,$namespace,$what)
1023: =split(/:/,$userinput);
1024: $namespace=~s/\//\_/g;
1025: $namespace=~s/\W//g;
1026: if ($namespace ne 'roles') {
1027: chomp($what);
1028: my $proname=propath($udom,$uname);
1029: my $now=time;
1030: unless ($namespace=~/^nohist\_/) {
1031: my $hfh;
1032: if (
1033: $hfh=IO::File->new(">>$proname/$namespace.hist")
1034: ) { print $hfh "P:$now:$what\n"; }
1035: }
1036: my @pairs=split(/\&/,$what);
1037: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1038: foreach $pair (@pairs) {
1039: ($key,$value)=split(/=/,$pair);
1040: $hash{$key}=$value;
1041: }
1042: if (untie(%hash)) {
1043: print $client "ok\n";
1044: } else {
1045: print $client "error:$!\n";
1046: }
1047: } else {
1048: print $client "error:$!\n";
1049: }
1050: } else {
1051: print $client "refused\n";
1052: }
1053: # -------------------------------------------------------------------- rolesput
1054: } elsif ($userinput =~ /^rolesput/) {
1055: &Debug("rolesput");
1056: if ($wasenc==1) {
1057: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
1058: =split(/:/,$userinput);
1059: &Debug("cmd = ".$cmd." exedom= ".$exedom.
1060: "user = ".$exeuser." udom=".$udom.
1061: "what = ".$what);
1062: my $namespace='roles';
1063: chomp($what);
1064: my $proname=propath($udom,$uname);
1065: my $now=time;
1066: {
1067: my $hfh;
1068: if (
1069: $hfh=IO::File->new(">>$proname/$namespace.hist")
1070: ) {
1071: print $hfh "P:$now:$exedom:$exeuser:$what\n";
1072: }
1073: }
1074: my @pairs=split(/\&/,$what);
1075: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1076: foreach $pair (@pairs) {
1077: ($key,$value)=split(/=/,$pair);
1078: &ManagePermissions($key, $udom, $uname,
1079: &GetAuthType( $udom,
1080: $uname));
1081: $hash{$key}=$value;
1082:
1083: }
1084: if (untie(%hash)) {
1085: print $client "ok\n";
1086: } else {
1087: print $client "error:$!\n";
1088: }
1089: } else {
1090: print $client "error:$!\n";
1091: }
1092: } else {
1093: print $client "refused\n";
1094: }
1095: # ------------------------------------------------------------------------- get
1096: } elsif ($userinput =~ /^get/) {
1097: my ($cmd,$udom,$uname,$namespace,$what)
1098: =split(/:/,$userinput);
1099: $namespace=~s/\//\_/g;
1100: $namespace=~s/\W//g;
1101: chomp($what);
1102: my @queries=split(/\&/,$what);
1103: my $proname=propath($udom,$uname);
1104: my $qresult='';
1105: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1106: for ($i=0;$i<=$#queries;$i++) {
1107: $qresult.="$hash{$queries[$i]}&";
1108: }
1109: if (untie(%hash)) {
1110: $qresult=~s/\&$//;
1111: print $client "$qresult\n";
1112: } else {
1113: print $client "error:$!\n";
1114: }
1115: } else {
1116: print $client "error:$!\n";
1117: }
1118: # ------------------------------------------------------------------------ eget
1119: } elsif ($userinput =~ /^eget/) {
1120: my ($cmd,$udom,$uname,$namespace,$what)
1121: =split(/:/,$userinput);
1122: $namespace=~s/\//\_/g;
1123: $namespace=~s/\W//g;
1124: chomp($what);
1125: my @queries=split(/\&/,$what);
1126: my $proname=propath($udom,$uname);
1127: my $qresult='';
1128: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1129: for ($i=0;$i<=$#queries;$i++) {
1130: $qresult.="$hash{$queries[$i]}&";
1131: }
1132: if (untie(%hash)) {
1133: $qresult=~s/\&$//;
1134: if ($cipher) {
1135: my $cmdlength=length($qresult);
1136: $qresult.=" ";
1137: my $encqresult='';
1138: for
1139: (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
1140: $encqresult.=
1141: unpack("H16",
1142: $cipher->encrypt(substr($qresult,$encidx,8)));
1143: }
1144: print $client "enc:$cmdlength:$encqresult\n";
1145: } else {
1146: print $client "error:no_key\n";
1147: }
1148: } else {
1149: print $client "error:$!\n";
1150: }
1151: } else {
1152: print $client "error:$!\n";
1153: }
1154: # ------------------------------------------------------------------------- del
1155: } elsif ($userinput =~ /^del/) {
1156: my ($cmd,$udom,$uname,$namespace,$what)
1157: =split(/:/,$userinput);
1158: $namespace=~s/\//\_/g;
1159: $namespace=~s/\W//g;
1160: chomp($what);
1161: my $proname=propath($udom,$uname);
1162: my $now=time;
1163: unless ($namespace=~/^nohist\_/) {
1164: my $hfh;
1165: if (
1166: $hfh=IO::File->new(">>$proname/$namespace.hist")
1167: ) { print $hfh "D:$now:$what\n"; }
1168: }
1169: my @keys=split(/\&/,$what);
1170: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1171: foreach $key (@keys) {
1172: delete($hash{$key});
1173: }
1174: if (untie(%hash)) {
1175: print $client "ok\n";
1176: } else {
1177: print $client "error:$!\n";
1178: }
1179: } else {
1180: print $client "error:$!\n";
1181: }
1182: # ------------------------------------------------------------------------ keys
1183: } elsif ($userinput =~ /^keys/) {
1184: my ($cmd,$udom,$uname,$namespace)
1185: =split(/:/,$userinput);
1186: $namespace=~s/\//\_/g;
1187: $namespace=~s/\W//g;
1188: my $proname=propath($udom,$uname);
1189: my $qresult='';
1190: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1191: foreach $key (keys %hash) {
1192: $qresult.="$key&";
1193: }
1194: if (untie(%hash)) {
1195: $qresult=~s/\&$//;
1196: print $client "$qresult\n";
1197: } else {
1198: print $client "error:$!\n";
1199: }
1200: } else {
1201: print $client "error:$!\n";
1202: }
1203: # ------------------------------------------------------------------------ dump
1204: } elsif ($userinput =~ /^dump/) {
1205: my ($cmd,$udom,$uname,$namespace,$regexp)
1206: =split(/:/,$userinput);
1207: $namespace=~s/\//\_/g;
1208: $namespace=~s/\W//g;
1209: if (defined($regexp)) {
1210: $regexp=&unescape($regexp);
1211: } else {
1212: $regexp='.';
1213: }
1214: my $proname=propath($udom,$uname);
1215: my $qresult='';
1216: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1217: foreach $key (keys %hash) {
1218: if (eval('$key=~/$regexp/')) {
1219: $qresult.="$key=$hash{$key}&";
1220: }
1221: }
1222: if (untie(%hash)) {
1223: $qresult=~s/\&$//;
1224: print $client "$qresult\n";
1225: } else {
1226: print $client "error:$!\n";
1227: }
1228: } else {
1229: print $client "error:$!\n";
1230: }
1231: # ----------------------------------------------------------------------- store
1232: } elsif ($userinput =~ /^store/) {
1233: my ($cmd,$udom,$uname,$namespace,$rid,$what)
1234: =split(/:/,$userinput);
1235: $namespace=~s/\//\_/g;
1236: $namespace=~s/\W//g;
1237: if ($namespace ne 'roles') {
1238: chomp($what);
1239: my $proname=propath($udom,$uname);
1240: my $now=time;
1241: unless ($namespace=~/^nohist\_/) {
1242: my $hfh;
1243: if (
1244: $hfh=IO::File->new(">>$proname/$namespace.hist")
1245: ) { print $hfh "P:$now:$rid:$what\n"; }
1246: }
1247: my @pairs=split(/\&/,$what);
1248:
1249: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1250: my @previouskeys=split(/&/,$hash{"keys:$rid"});
1251: my $key;
1252: $hash{"version:$rid"}++;
1253: my $version=$hash{"version:$rid"};
1254: my $allkeys='';
1255: foreach $pair (@pairs) {
1256: ($key,$value)=split(/=/,$pair);
1257: $allkeys.=$key.':';
1258: $hash{"$version:$rid:$key"}=$value;
1259: }
1260: $hash{"$version:$rid:timestamp"}=$now;
1261: $allkeys.='timestamp';
1262: $hash{"$version:keys:$rid"}=$allkeys;
1263: if (untie(%hash)) {
1264: print $client "ok\n";
1265: } else {
1266: print $client "error:$!\n";
1267: }
1268: } else {
1269: print $client "error:$!\n";
1270: }
1271: } else {
1272: print $client "refused\n";
1273: }
1274: # --------------------------------------------------------------------- restore
1275: } elsif ($userinput =~ /^restore/) {
1276: my ($cmd,$udom,$uname,$namespace,$rid)
1277: =split(/:/,$userinput);
1278: $namespace=~s/\//\_/g;
1279: $namespace=~s/\W//g;
1280: chomp($rid);
1281: my $proname=propath($udom,$uname);
1282: my $qresult='';
1283: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1284: my $version=$hash{"version:$rid"};
1285: $qresult.="version=$version&";
1286: my $scope;
1287: for ($scope=1;$scope<=$version;$scope++) {
1288: my $vkeys=$hash{"$scope:keys:$rid"};
1289: my @keys=split(/:/,$vkeys);
1290: my $key;
1291: $qresult.="$scope:keys=$vkeys&";
1292: foreach $key (@keys) {
1293: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
1294: }
1295: }
1296: if (untie(%hash)) {
1297: $qresult=~s/\&$//;
1298: print $client "$qresult\n";
1299: } else {
1300: print $client "error:$!\n";
1301: }
1302: } else {
1303: print $client "error:$!\n";
1304: }
1305: # -------------------------------------------------------------------- chatsend
1306: } elsif ($userinput =~ /^chatsend/) {
1307: my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
1308: &chatadd($cdom,$cnum,$newpost);
1309: print $client "ok\n";
1310: # -------------------------------------------------------------------- chatretr
1311: } elsif ($userinput =~ /^chatretr/) {
1312: my ($cmd,$cdom,$cnum)=split(/\:/,$userinput);
1313: my $reply='';
1314: foreach (&getchat($cdom,$cnum)) {
1315: $reply.=&escape($_).':';
1316: }
1317: $reply=~s/\:$//;
1318: print $client $reply."\n";
1319: # ------------------------------------------------------------------- querysend
1320: } elsif ($userinput =~ /^querysend/) {
1321: my ($cmd,$query,
1322: $arg1,$arg2,$arg3)=split(/\:/,$userinput);
1323: $query=~s/\n*$//g;
1324: print $client "".
1325: sqlreply("$hostid{$clientip}\&$query".
1326: "\&$arg1"."\&$arg2"."\&$arg3")."\n";
1327: # ------------------------------------------------------------------ queryreply
1328: } elsif ($userinput =~ /^queryreply/) {
1329: my ($cmd,$id,$reply)=split(/:/,$userinput);
1330: my $store;
1331: my $execdir=$perlvar{'lonDaemons'};
1332: if ($store=IO::File->new(">$execdir/tmp/$id")) {
1333: $reply=~s/\&/\n/g;
1334: print $store $reply;
1335: close $store;
1336: my $store2=IO::File->new(">$execdir/tmp/$id.end");
1337: print $store2 "done\n";
1338: close $store2;
1339: print $client "ok\n";
1340: }
1341: else {
1342: print $client "error:$!\n";
1343: }
1344: # ----------------------------------------------------------------------- idput
1345: } elsif ($userinput =~ /^idput/) {
1346: my ($cmd,$udom,$what)=split(/:/,$userinput);
1347: chomp($what);
1348: $udom=~s/\W//g;
1349: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
1350: my $now=time;
1351: {
1352: my $hfh;
1353: if (
1354: $hfh=IO::File->new(">>$proname.hist")
1355: ) { print $hfh "P:$now:$what\n"; }
1356: }
1357: my @pairs=split(/\&/,$what);
1358: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT,0640)) {
1359: foreach $pair (@pairs) {
1360: ($key,$value)=split(/=/,$pair);
1361: $hash{$key}=$value;
1362: }
1363: if (untie(%hash)) {
1364: print $client "ok\n";
1365: } else {
1366: print $client "error:$!\n";
1367: }
1368: } else {
1369: print $client "error:$!\n";
1370: }
1371: # ----------------------------------------------------------------------- idget
1372: } elsif ($userinput =~ /^idget/) {
1373: my ($cmd,$udom,$what)=split(/:/,$userinput);
1374: chomp($what);
1375: $udom=~s/\W//g;
1376: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
1377: my @queries=split(/\&/,$what);
1378: my $qresult='';
1379: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER,0640)) {
1380: for ($i=0;$i<=$#queries;$i++) {
1381: $qresult.="$hash{$queries[$i]}&";
1382: }
1383: if (untie(%hash)) {
1384: $qresult=~s/\&$//;
1385: print $client "$qresult\n";
1386: } else {
1387: print $client "error:$!\n";
1388: }
1389: } else {
1390: print $client "error:$!\n";
1391: }
1392: # ---------------------------------------------------------------------- tmpput
1393: } elsif ($userinput =~ /^tmpput/) {
1394: my ($cmd,$what)=split(/:/,$userinput);
1395: my $store;
1396: $tmpsnum++;
1397: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
1398: $id=~s/\W/\_/g;
1399: $what=~s/\n//g;
1400: my $execdir=$perlvar{'lonDaemons'};
1401: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
1402: print $store $what;
1403: close $store;
1404: print $client "$id\n";
1405: }
1406: else {
1407: print $client "error:$!\n";
1408: }
1409:
1410: # ---------------------------------------------------------------------- tmpget
1411: } elsif ($userinput =~ /^tmpget/) {
1412: my ($cmd,$id)=split(/:/,$userinput);
1413: chomp($id);
1414: $id=~s/\W/\_/g;
1415: my $store;
1416: my $execdir=$perlvar{'lonDaemons'};
1417: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
1418: my $reply=<$store>;
1419: print $client "$reply\n";
1420: close $store;
1421: }
1422: else {
1423: print $client "error:$!\n";
1424: }
1425:
1426: # -------------------------------------------------------------------------- ls
1427: } elsif ($userinput =~ /^ls/) {
1428: my ($cmd,$ulsdir)=split(/:/,$userinput);
1429: my $ulsout='';
1430: my $ulsfn;
1431: if (-e $ulsdir) {
1432: if(-d $ulsdir) {
1433: if (opendir(LSDIR,$ulsdir)) {
1434: while ($ulsfn=readdir(LSDIR)) {
1435: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1436: $ulsout.=$ulsfn.'&'.
1437: join('&',@ulsstats).':';
1438: }
1439: closedir(LSDIR);
1440: }
1441: } else {
1442: my @ulsstats=stat($ulsdir);
1443: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1444: }
1445: } else {
1446: $ulsout='no_such_dir';
1447: }
1448: if ($ulsout eq '') { $ulsout='empty'; }
1449: print $client "$ulsout\n";
1450: # ------------------------------------------------------------------ Hanging up
1451: } elsif (($userinput =~ /^exit/) ||
1452: ($userinput =~ /^init/)) {
1453: &logthis(
1454: "Client $clientip ($hostid{$clientip}) hanging up: $userinput");
1455: print $client "bye\n";
1456: $client->close();
1457: last;
1458: # ------------------------------------------------------------- unknown command
1459: } else {
1460: # unknown command
1461: print $client "unknown_cmd\n";
1462: }
1463: # -------------------------------------------------------------------- complete
1464: alarm(0);
1465: &status('Listening to '.$hostid{$clientip});
1466: }
1467: # --------------------------------------------- client unknown or fishy, refuse
1468: } else {
1469: print $client "refused\n";
1470: $client->close();
1471: &logthis("<font color=blue>WARNING: "
1472: ."Rejected client $clientip, closing connection</font>");
1473: }
1474: }
1475:
1476: # =============================================================================
1477:
1478: &logthis("<font color=red>CRITICAL: "
1479: ."Disconnect from $clientip ($hostid{$clientip})</font>");
1480: # tidy up gracefully and finish
1481:
1482: $server->close();
1483:
1484: # this exit is VERY important, otherwise the child will become
1485: # a producer of more and more children, forking yourself into
1486: # process death.
1487: exit;
1488: }
1489: }
1490:
1491:
1492: #
1493: # Checks to see if the input roleput request was to set
1494: # an author role. If so, invokes the lchtmldir script to set
1495: # up a correct public_html
1496: # Parameters:
1497: # request - The request sent to the rolesput subchunk.
1498: # We're looking for /domain/_au
1499: # domain - The domain in which the user is having roles doctored.
1500: # user - Name of the user for which the role is being put.
1501: # authtype - The authentication type associated with the user.
1502: #
1503: sub ManagePermissions
1504: {
1505: my $request = shift;
1506: my $domain = shift;
1507: my $user = shift;
1508: my $authtype= shift;
1509:
1510: # See if the request is of the form /$domain/_au
1511:
1512: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
1513: my $execdir = $perlvar{'lonDaemons'};
1514: my $userhome= "/home/$user" ;
1515: Debug("system $execdir/lchtmldir $userhome $system $authtype");
1516: system("$execdir/lchtmldir $userhome $user $authtype");
1517: }
1518: }
1519: #
1520: # GetAuthType - Determines the authorization type of a user in a domain.
1521:
1522: # Returns the authorization type or nouser if there is no such user.
1523: #
1524: sub GetAuthType
1525: {
1526: my $domain = shift;
1527: my $user = shift;
1528:
1529: Debug("GetAuthType( $domain, $user ) \n");
1530: my $proname = &propath($domain, $user);
1531: my $passwdfile = "$proname/passwd";
1532: if( -e $passwdfile ) {
1533: my $pf = IO::File->new($passwdfile);
1534: my $realpassword = <$pf>;
1535: chomp($realpassword);
1536: Debug("Password info = $realpassword\n");
1537: my ($authtype, $contentpwd) = split(/:/, $realpassword);
1538: Debug("Authtype = $authtype, content = $contentpwd\n");
1539: my $availinfo = '';
1540: if($authtype eq 'krb4') {
1541: $availinfo = $contentpwd;
1542: }
1543:
1544: return "$authtype:$availinfo";
1545: }
1546: else {
1547: Debug("Returning nouser");
1548: return "nouser";
1549: }
1550: }
1551:
1552: sub addline {
1553: my ($fname,$hostid,$ip,$newline)=@_;
1554: my $contents;
1555: my $found=0;
1556: my $expr='^'.$hostid.':'.$ip.':';
1557: $expr =~ s/\./\\\./g;
1558: if ($sh=IO::File->new("$fname.subscription")) {
1559: while (my $subline=<$sh>) {
1560: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
1561: }
1562: $sh->close();
1563: }
1564: $sh=IO::File->new(">$fname.subscription");
1565: if ($contents) { print $sh $contents; }
1566: if ($newline) { print $sh $newline; }
1567: $sh->close();
1568: return $found;
1569: }
1570:
1571: sub getchat {
1572: my ($cdom,$cname)=@_;
1573: my %hash;
1574: my $proname=&propath($cdom,$cname);
1575: my @entries=();
1576: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
1577: &GDBM_READER(),0640)) {
1578: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
1579: untie %hash;
1580: }
1581: return @entries;
1582: }
1583:
1584: sub chatadd {
1585: my ($cdom,$cname,$newchat)=@_;
1586: my %hash;
1587: my $proname=&propath($cdom,$cname);
1588: my @entries=();
1589: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
1590: &GDBM_WRCREAT(),0640)) {
1591: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
1592: my $time=time;
1593: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
1594: my ($thentime,$idnum)=split(/\_/,$lastid);
1595: my $newid=$time.'_000000';
1596: if ($thentime==$time) {
1597: $idnum=~s/^0+//;
1598: $idnum++;
1599: $idnum=substr('000000'.$idnum,-6,6);
1600: $newid=$time.'_'.$idnum;
1601: }
1602: $hash{$newid}=$newchat;
1603: my $expired=$time-3600;
1604: foreach (keys %hash) {
1605: my ($thistime)=($_=~/(\d+)\_/);
1606: if ($thistime<$expired) {
1607: undef $hash{$_};
1608: }
1609: }
1610: untie %hash;
1611: }
1612: }
1613:
1614: sub unsub {
1615: my ($fname,$clientip)=@_;
1616: my $result;
1617: if (unlink("$fname.$hostid{$clientip}")) {
1618: $result="ok\n";
1619: } else {
1620: $result="not_subscribed\n";
1621: }
1622: if (-e "$fname.subscription") {
1623: my $found=&addline($fname,$hostid{$clientip},$clientip,'');
1624: if ($found) { $result="ok\n"; }
1625: } else {
1626: if ($result != "ok\n") { $result="not_subscribed\n"; }
1627: }
1628: return $result;
1629: }
1630:
1631: sub subscribe {
1632: my ($userinput,$clientip)=@_;
1633: my $result;
1634: my ($cmd,$fname)=split(/:/,$userinput);
1635: my $ownership=&ishome($fname);
1636: if ($ownership eq 'owner') {
1637: if (-e $fname) {
1638: if (-d $fname) {
1639: $result="directory\n";
1640: } else {
1641: if (-e "$fname.$hostid{$clientip}") {&unsub($fname,$clientip);}
1642: $now=time;
1643: my $found=&addline($fname,$hostid{$clientip},$clientip,
1644: "$hostid{$clientip}:$clientip:$now\n");
1645: if ($found) { $result="$fname\n"; }
1646: # if they were subscribed to only meta data, delete that
1647: # subscription, when you subscribe to a file you also get
1648: # the metadata
1649: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
1650: $fname=~s/\/home\/httpd\/html\/res/raw/;
1651: $fname="http://$thisserver/".$fname;
1652: $result="$fname\n";
1653: }
1654: } else {
1655: $result="not_found\n";
1656: }
1657: } else {
1658: $result="rejected\n";
1659: }
1660: return $result;
1661: }
1662: # ----------------------------------- POD (plain old documentation, CPAN style)
1663:
1664: =head1 NAME
1665:
1666: lond - "LON Daemon" Server (port "LOND" 5663)
1667:
1668: =head1 SYNOPSIS
1669:
1670: Usage: B<lond>
1671:
1672: Should only be run as user=www. This is a command-line script which
1673: is invoked by B<loncron>. There is no expectation that a typical user
1674: will manually start B<lond> from the command-line. (In other words,
1675: DO NOT START B<lond> YOURSELF.)
1676:
1677: =head1 DESCRIPTION
1678:
1679: There are two characteristics associated with the running of B<lond>,
1680: PROCESS MANAGEMENT (starting, stopping, handling child processes)
1681: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
1682: subscriptions, etc). These are described in two large
1683: sections below.
1684:
1685: B<PROCESS MANAGEMENT>
1686:
1687: Preforker - server who forks first. Runs as a daemon. HUPs.
1688: Uses IDEA encryption
1689:
1690: B<lond> forks off children processes that correspond to the other servers
1691: in the network. Management of these processes can be done at the
1692: parent process level or the child process level.
1693:
1694: B<logs/lond.log> is the location of log messages.
1695:
1696: The process management is now explained in terms of linux shell commands,
1697: subroutines internal to this code, and signal assignments:
1698:
1699: =over 4
1700:
1701: =item *
1702:
1703: PID is stored in B<logs/lond.pid>
1704:
1705: This is the process id number of the parent B<lond> process.
1706:
1707: =item *
1708:
1709: SIGTERM and SIGINT
1710:
1711: Parent signal assignment:
1712: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
1713:
1714: Child signal assignment:
1715: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
1716: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
1717: to restart a new child.)
1718:
1719: Command-line invocations:
1720: B<kill> B<-s> SIGTERM I<PID>
1721: B<kill> B<-s> SIGINT I<PID>
1722:
1723: Subroutine B<HUNTSMAN>:
1724: This is only invoked for the B<lond> parent I<PID>.
1725: This kills all the children, and then the parent.
1726: The B<lonc.pid> file is cleared.
1727:
1728: =item *
1729:
1730: SIGHUP
1731:
1732: Current bug:
1733: This signal can only be processed the first time
1734: on the parent process. Subsequent SIGHUP signals
1735: have no effect.
1736:
1737: Parent signal assignment:
1738: $SIG{HUP} = \&HUPSMAN;
1739:
1740: Child signal assignment:
1741: none (nothing happens)
1742:
1743: Command-line invocations:
1744: B<kill> B<-s> SIGHUP I<PID>
1745:
1746: Subroutine B<HUPSMAN>:
1747: This is only invoked for the B<lond> parent I<PID>,
1748: This kills all the children, and then the parent.
1749: The B<lond.pid> file is cleared.
1750:
1751: =item *
1752:
1753: SIGUSR1
1754:
1755: Parent signal assignment:
1756: $SIG{USR1} = \&USRMAN;
1757:
1758: Child signal assignment:
1759: $SIG{USR1}= \&logstatus;
1760:
1761: Command-line invocations:
1762: B<kill> B<-s> SIGUSR1 I<PID>
1763:
1764: Subroutine B<USRMAN>:
1765: When invoked for the B<lond> parent I<PID>,
1766: SIGUSR1 is sent to all the children, and the status of
1767: each connection is logged.
1768:
1769: =item *
1770:
1771: SIGCHLD
1772:
1773: Parent signal assignment:
1774: $SIG{CHLD} = \&REAPER;
1775:
1776: Child signal assignment:
1777: none
1778:
1779: Command-line invocations:
1780: B<kill> B<-s> SIGCHLD I<PID>
1781:
1782: Subroutine B<REAPER>:
1783: This is only invoked for the B<lond> parent I<PID>.
1784: Information pertaining to the child is removed.
1785: The socket port is cleaned up.
1786:
1787: =back
1788:
1789: B<SERVER-SIDE ACTIVITIES>
1790:
1791: Server-side information can be accepted in an encrypted or non-encrypted
1792: method.
1793:
1794: =over 4
1795:
1796: =item ping
1797:
1798: Query a client in the hosts.tab table; "Are you there?"
1799:
1800: =item pong
1801:
1802: Respond to a ping query.
1803:
1804: =item ekey
1805:
1806: Read in encrypted key, make cipher. Respond with a buildkey.
1807:
1808: =item load
1809:
1810: Respond with CPU load based on a computation upon /proc/loadavg.
1811:
1812: =item currentauth
1813:
1814: Reply with current authentication information (only over an
1815: encrypted channel).
1816:
1817: =item auth
1818:
1819: Only over an encrypted channel, reply as to whether a user's
1820: authentication information can be validated.
1821:
1822: =item passwd
1823:
1824: Allow for a password to be set.
1825:
1826: =item makeuser
1827:
1828: Make a user.
1829:
1830: =item passwd
1831:
1832: Allow for authentication mechanism and password to be changed.
1833:
1834: =item home
1835:
1836: Respond to a question "are you the home for a given user?"
1837:
1838: =item update
1839:
1840: Update contents of a subscribed resource.
1841:
1842: =item unsubscribe
1843:
1844: The server is unsubscribing from a resource.
1845:
1846: =item subscribe
1847:
1848: The server is subscribing to a resource.
1849:
1850: =item log
1851:
1852: Place in B<logs/lond.log>
1853:
1854: =item put
1855:
1856: stores hash in namespace
1857:
1858: =item rolesput
1859:
1860: put a role into a user's environment
1861:
1862: =item get
1863:
1864: returns hash with keys from array
1865: reference filled in from namespace
1866:
1867: =item eget
1868:
1869: returns hash with keys from array
1870: reference filled in from namesp (encrypts the return communication)
1871:
1872: =item rolesget
1873:
1874: get a role from a user's environment
1875:
1876: =item del
1877:
1878: deletes keys out of array from namespace
1879:
1880: =item keys
1881:
1882: returns namespace keys
1883:
1884: =item dump
1885:
1886: dumps the complete (or key matching regexp) namespace into a hash
1887:
1888: =item store
1889:
1890: stores hash permanently
1891: for this url; hashref needs to be given and should be a \%hashname; the
1892: remaining args aren't required and if they aren't passed or are '' they will
1893: be derived from the ENV
1894:
1895: =item restore
1896:
1897: returns a hash for a given url
1898:
1899: =item querysend
1900:
1901: Tells client about the lonsql process that has been launched in response
1902: to a sent query.
1903:
1904: =item queryreply
1905:
1906: Accept information from lonsql and make appropriate storage in temporary
1907: file space.
1908:
1909: =item idput
1910:
1911: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
1912: for each student, defined perhaps by the institutional Registrar.)
1913:
1914: =item idget
1915:
1916: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
1917: for each student, defined perhaps by the institutional Registrar.)
1918:
1919: =item tmpput
1920:
1921: Accept and store information in temporary space.
1922:
1923: =item tmpget
1924:
1925: Send along temporarily stored information.
1926:
1927: =item ls
1928:
1929: List part of a user's directory.
1930:
1931: =item Hanging up (exit or init)
1932:
1933: What to do when a client tells the server that they (the client)
1934: are leaving the network.
1935:
1936: =item unknown command
1937:
1938: If B<lond> is sent an unknown command (not in the list above),
1939: it replys to the client "unknown_cmd".
1940:
1941: =item UNKNOWN CLIENT
1942:
1943: If the anti-spoofing algorithm cannot verify the client,
1944: the client is rejected (with a "refused" message sent
1945: to the client, and the connection is closed.
1946:
1947: =back
1948:
1949: =head1 PREREQUISITES
1950:
1951: IO::Socket
1952: IO::File
1953: Apache::File
1954: Symbol
1955: POSIX
1956: Crypt::IDEA
1957: LWP::UserAgent()
1958: GDBM_File
1959: Authen::Krb4
1960:
1961: =head1 COREQUISITES
1962:
1963: =head1 OSNAMES
1964:
1965: linux
1966:
1967: =head1 SCRIPT CATEGORIES
1968:
1969: Server/Process
1970:
1971: =cut
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