1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.103 2002/10/30 14:50:04 www Exp $
6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27: # http://www.lon-capa.org/
28: #
29: # 5/26/99,6/4,6/10,6/11,6/14,6/15,6/26,6/28,6/30,
30: # 7/8,7/9,7/10,7/12,7/17,7/19,9/21,
31: # 10/7,10/8,10/9,10/11,10/13,10/15,11/4,11/16,
32: # 12/7,12/15,01/06,01/11,01/12,01/14,2/8,
33: # 03/07,05/31 Gerd Kortemeyer
34: # 06/26 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 Authen::Krb5;
78: use lib '/home/httpd/lib/perl/';
79: use localauth;
80:
81: my $DEBUG = 0; # Non zero to enable debug log entries.
82:
83: my $status='';
84: my $lastlog='';
85:
86: #
87: # The array below are password error strings."
88: #
89: my $lastpwderror = 13; # Largest error number from lcpasswd.
90: my @passwderrors = ("ok",
91: "lcpasswd must be run as user 'www'",
92: "lcpasswd got incorrect number of arguments",
93: "lcpasswd did not get the right nubmer of input text lines",
94: "lcpasswd too many simultaneous pwd changes in progress",
95: "lcpasswd User does not exist.",
96: "lcpasswd Incorrect current passwd",
97: "lcpasswd Unable to su to root.",
98: "lcpasswd Cannot set new passwd.",
99: "lcpasswd Username has invalid characters",
100: "lcpasswd Invalid characters in password",
101: "11", "12",
102: "lcpasswd Password mismatch");
103:
104:
105: # The array below are lcuseradd error strings.:
106:
107: my $lastadderror = 13;
108: my @adderrors = ("ok",
109: "User ID mismatch, lcuseradd must run as user www",
110: "lcuseradd Incorrect number of command line parameters must be 3",
111: "lcuseradd Incorrect number of stdinput lines, must be 3",
112: "lcuseradd Too many other simultaneous pwd changes in progress",
113: "lcuseradd User does not exist",
114: "lcuseradd Unabel to mak ewww member of users's group",
115: "lcuseradd Unable to su to root",
116: "lcuseradd Unable to set password",
117: "lcuseradd Usrname has invbalid charcters",
118: "lcuseradd Password has an invalid character",
119: "lcuseradd User already exists",
120: "lcuseradd Could not add user.",
121: "lcuseradd Password mismatch");
122:
123:
124: #
125: # Convert an error return code from lcpasswd to a string value.
126: #
127: sub lcpasswdstrerror {
128: my $ErrorCode = shift;
129: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
130: return "lcpasswd Unrecognized error return value ".$ErrorCode;
131: } else {
132: return $passwderrors[$ErrorCode];
133: }
134: }
135:
136: #
137: # Convert an error return code from lcuseradd to a string value:
138: #
139: sub lcuseraddstrerror {
140: my $ErrorCode = shift;
141: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
142: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
143: } else {
144: return $adderrors[$ErrorCode];
145: }
146: }
147:
148: # grabs exception and records it to log before exiting
149: sub catchexception {
150: my ($error)=@_;
151: $SIG{'QUIT'}='DEFAULT';
152: $SIG{__DIE__}='DEFAULT';
153: &logthis("<font color=red>CRITICAL: "
154: ."ABNORMAL EXIT. Child $$ for server $wasserver died through "
155: ."a crash with this error msg->[$error]</font>");
156: &logthis('Famous last words: '.$status.' - '.$lastlog);
157: if ($client) { print $client "error: $error\n"; }
158: $server->close();
159: die($error);
160: }
161:
162: sub timeout {
163: &logthis("<font color=ref>CRITICAL: TIME OUT ".$$."</font>");
164: &catchexception('Timeout');
165: }
166: # -------------------------------- Set signal handlers to record abnormal exits
167:
168: $SIG{'QUIT'}=\&catchexception;
169: $SIG{__DIE__}=\&catchexception;
170:
171: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
172: &status("Read loncapa.conf and loncapa_apache.conf");
173: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
174: my %perlvar=%{$perlvarref};
175: undef $perlvarref;
176:
177: # ----------------------------- Make sure this process is running from user=www
178: my $wwwid=getpwnam('www');
179: if ($wwwid!=$<) {
180: $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
181: $subj="LON: $perlvar{'lonHostID'} User ID mismatch";
182: system("echo 'User ID mismatch. lond must be run as user www.' |\
183: mailto $emailto -s '$subj' > /dev/null");
184: exit 1;
185: }
186:
187: # --------------------------------------------- Check if other instance running
188:
189: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
190:
191: if (-e $pidfile) {
192: my $lfh=IO::File->new("$pidfile");
193: my $pide=<$lfh>;
194: chomp($pide);
195: if (kill 0 => $pide) { die "already running"; }
196: }
197:
198: $PREFORK=4; # number of children to maintain, at least four spare
199:
200: # ------------------------------------------------------------- Read hosts file
201:
202: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
203:
204: while ($configline=<CONFIG>) {
205: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
206: chomp($ip); $ip=~s/\D+$//;
207: $hostid{$ip}=$id;
208: if ($id eq $perlvar{'lonHostID'}) { $thisserver=$name; }
209: $PREFORK++;
210: }
211: close(CONFIG);
212:
213: # establish SERVER socket, bind and listen.
214: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
215: Type => SOCK_STREAM,
216: Proto => 'tcp',
217: Reuse => 1,
218: Listen => 10 )
219: or die "making socket: $@\n";
220:
221: # --------------------------------------------------------- Do global variables
222:
223: # global variables
224:
225: $MAX_CLIENTS_PER_CHILD = 50; # number of clients each child should
226: # process
227: %children = (); # keys are current child process IDs
228: $children = 0; # current number of children
229:
230: sub REAPER { # takes care of dead children
231: $SIG{CHLD} = \&REAPER;
232: my $pid = wait;
233: if (defined($children{$pid})) {
234: &logthis("Child $pid died");
235: $children --;
236: delete $children{$pid};
237: } else {
238: &logthis("Unknown Child $pid died");
239: }
240: }
241:
242: sub HUNTSMAN { # signal handler for SIGINT
243: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
244: kill 'INT' => keys %children;
245: &logthis("Free socket: ".shutdown($server,2)); # free up socket
246: my $execdir=$perlvar{'lonDaemons'};
247: unlink("$execdir/logs/lond.pid");
248: &logthis("<font color=red>CRITICAL: Shutting down</font>");
249: exit; # clean up with dignity
250: }
251:
252: sub HUPSMAN { # signal handler for SIGHUP
253: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
254: kill 'INT' => keys %children;
255: &logthis("Free socket: ".shutdown($server,2)); # free up socket
256: &logthis("<font color=red>CRITICAL: Restarting</font>");
257: unlink("$execdir/logs/lond.pid");
258: my $execdir=$perlvar{'lonDaemons'};
259: exec("$execdir/lond"); # here we go again
260: }
261:
262: sub checkchildren {
263: &initnewstatus();
264: &logstatus();
265: &logthis('Going to check on the children');
266: $docdir=$perlvar{'lonDocRoot'};
267: foreach (sort keys %children) {
268: sleep 1;
269: unless (kill 'USR1' => $_) {
270: &logthis ('Child '.$_.' is dead');
271: &logstatus($$.' is dead');
272: }
273: }
274: sleep 5;
275: foreach (sort keys %children) {
276: unless (-e "$docdir/lon-status/londchld/$_.txt") {
277: &logthis('Child '.$_.' did not respond');
278: kill 9 => $_;
279: $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
280: $subj="LON: $perlvar{'lonHostID'} killed lond process $_";
281: my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
282: $execdir=$perlvar{'lonDaemons'};
283: $result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`
284: }
285: }
286: }
287:
288: # --------------------------------------------------------------------- Logging
289:
290: sub logthis {
291: my $message=shift;
292: my $execdir=$perlvar{'lonDaemons'};
293: my $fh=IO::File->new(">>$execdir/logs/lond.log");
294: my $now=time;
295: my $local=localtime($now);
296: $lastlog=$local.': '.$message;
297: print $fh "$local ($$): $message\n";
298: }
299:
300: # ------------------------- Conditional log if $DEBUG true.
301: sub Debug {
302: my $message = shift;
303: if($DEBUG) {
304: &logthis($message);
305: }
306: }
307: # ------------------------------------------------------------------ Log status
308:
309: sub logstatus {
310: my $docdir=$perlvar{'lonDocRoot'};
311: {
312: my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");
313: print $fh $$."\t".$status."\t".$lastlog."\n";
314: $fh->close();
315: }
316: {
317: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
318: print $fh $status."\n".$lastlog."\n".time;
319: $fh->close();
320: }
321: }
322:
323: sub initnewstatus {
324: my $docdir=$perlvar{'lonDocRoot'};
325: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
326: my $now=time;
327: my $local=localtime($now);
328: print $fh "LOND status $local - parent $$\n\n";
329: opendir(DIR,"$docdir/lon-status/londchld");
330: while ($filename=readdir(DIR)) {
331: unlink("$docdir/lon-status/londchld/$filename");
332: }
333: closedir(DIR);
334: }
335:
336: # -------------------------------------------------------------- Status setting
337:
338: sub status {
339: my $what=shift;
340: my $now=time;
341: my $local=localtime($now);
342: $status=$local.': '.$what;
343: $0='lond: '.$what.' '.$local;
344: }
345:
346: # -------------------------------------------------------- Escape Special Chars
347:
348: sub escape {
349: my $str=shift;
350: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
351: return $str;
352: }
353:
354: # ----------------------------------------------------- Un-Escape Special Chars
355:
356: sub unescape {
357: my $str=shift;
358: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
359: return $str;
360: }
361:
362: # ----------------------------------------------------------- Send USR1 to lonc
363:
364: sub reconlonc {
365: my $peerfile=shift;
366: &logthis("Trying to reconnect for $peerfile");
367: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
368: if (my $fh=IO::File->new("$loncfile")) {
369: my $loncpid=<$fh>;
370: chomp($loncpid);
371: if (kill 0 => $loncpid) {
372: &logthis("lonc at pid $loncpid responding, sending USR1");
373: kill USR1 => $loncpid;
374: sleep 5;
375: if (-e "$peerfile") { return; }
376: &logthis("$peerfile still not there, give it another try");
377: sleep 10;
378: if (-e "$peerfile") { return; }
379: &logthis(
380: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
381: } else {
382: &logthis(
383: "<font color=red>CRITICAL: "
384: ."lonc at pid $loncpid not responding, giving up</font>");
385: }
386: } else {
387: &logthis('<font color=red>CRITICAL: lonc not running, giving up</font>');
388: }
389: }
390:
391: # -------------------------------------------------- Non-critical communication
392:
393: sub subreply {
394: my ($cmd,$server)=@_;
395: my $peerfile="$perlvar{'lonSockDir'}/$server";
396: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
397: Type => SOCK_STREAM,
398: Timeout => 10)
399: or return "con_lost";
400: print $sclient "$cmd\n";
401: my $answer=<$sclient>;
402: chomp($answer);
403: if (!$answer) { $answer="con_lost"; }
404: return $answer;
405: }
406:
407: sub reply {
408: my ($cmd,$server)=@_;
409: my $answer;
410: if ($server ne $perlvar{'lonHostID'}) {
411: $answer=subreply($cmd,$server);
412: if ($answer eq 'con_lost') {
413: $answer=subreply("ping",$server);
414: if ($answer ne $server) {
415: &logthis("sub reply: answer != server");
416: &reconlonc("$perlvar{'lonSockDir'}/$server");
417: }
418: $answer=subreply($cmd,$server);
419: }
420: } else {
421: $answer='self_reply';
422: }
423: return $answer;
424: }
425:
426: # -------------------------------------------------------------- Talk to lonsql
427:
428: sub sqlreply {
429: my ($cmd)=@_;
430: my $answer=subsqlreply($cmd);
431: if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }
432: return $answer;
433: }
434:
435: sub subsqlreply {
436: my ($cmd)=@_;
437: my $unixsock="mysqlsock";
438: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
439: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
440: Type => SOCK_STREAM,
441: Timeout => 10)
442: or return "con_lost";
443: print $sclient "$cmd\n";
444: my $answer=<$sclient>;
445: chomp($answer);
446: if (!$answer) { $answer="con_lost"; }
447: return $answer;
448: }
449:
450: # -------------------------------------------- Return path to profile directory
451:
452: sub propath {
453: my ($udom,$uname)=@_;
454: $udom=~s/\W//g;
455: $uname=~s/\W//g;
456: my $subdir=$uname.'__';
457: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
458: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
459: return $proname;
460: }
461:
462: # --------------------------------------- Is this the home server of an author?
463:
464: sub ishome {
465: my $author=shift;
466: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
467: my ($udom,$uname)=split(/\//,$author);
468: my $proname=propath($udom,$uname);
469: if (-e $proname) {
470: return 'owner';
471: } else {
472: return 'not_owner';
473: }
474: }
475:
476: # ======================================================= Continue main program
477: # ---------------------------------------------------- Fork once and dissociate
478:
479: $fpid=fork;
480: exit if $fpid;
481: die "Couldn't fork: $!" unless defined ($fpid);
482:
483: POSIX::setsid() or die "Can't start new session: $!";
484:
485: # ------------------------------------------------------- Write our PID on disk
486:
487: $execdir=$perlvar{'lonDaemons'};
488: open (PIDSAVE,">$execdir/logs/lond.pid");
489: print PIDSAVE "$$\n";
490: close(PIDSAVE);
491: &logthis("<font color=red>CRITICAL: ---------- Starting ----------</font>");
492: &status('Starting');
493:
494: # ------------------------------------------------------- Now we are on our own
495:
496: # Fork off our children.
497: for (1 .. $PREFORK) {
498: make_new_child();
499: }
500:
501: # ----------------------------------------------------- Install signal handlers
502:
503: &status('Forked children');
504:
505: $SIG{CHLD} = \&REAPER;
506: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
507: $SIG{HUP} = \&HUPSMAN;
508: $SIG{USR1} = \&checkchildren;
509:
510: # And maintain the population.
511: while (1) {
512: &status('Sleeping');
513: sleep; # wait for a signal (i.e., child's death)
514: &logthis('Woke up');
515: &status('Woke up');
516: for ($i = $children; $i < $PREFORK; $i++) {
517: make_new_child(); # top up the child pool
518: }
519: }
520:
521: sub make_new_child {
522: my $pid;
523: my $cipher;
524: my $sigset;
525: &logthis("Attempting to start child");
526: # block signal for fork
527: $sigset = POSIX::SigSet->new(SIGINT);
528: sigprocmask(SIG_BLOCK, $sigset)
529: or die "Can't block SIGINT for fork: $!\n";
530:
531: die "fork: $!" unless defined ($pid = fork);
532:
533: if ($pid) {
534: # Parent records the child's birth and returns.
535: sigprocmask(SIG_UNBLOCK, $sigset)
536: or die "Can't unblock SIGINT for fork: $!\n";
537: $children{$pid} = 1;
538: $children++;
539: &status('Started child '.$pid);
540: return;
541: } else {
542: # Child can *not* return from this subroutine.
543: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
544: $SIG{USR1}= \&logstatus;
545: $SIG{ALRM}= \&timeout;
546: $lastlog='Forked ';
547: $status='Forked';
548:
549: # unblock signals
550: sigprocmask(SIG_UNBLOCK, $sigset)
551: or die "Can't unblock SIGINT for fork: $!\n";
552:
553: $tmpsnum=0;
554: #---------------------------------------------------- kerberos 5 initialization
555: &Authen::Krb5::init_context();
556: &Authen::Krb5::init_ets();
557:
558: # handle connections until we've reached $MAX_CLIENTS_PER_CHILD
559: for ($i=0; $i < $MAX_CLIENTS_PER_CHILD; $i++) {
560: &status('Idle, waiting for connection');
561: $client = $server->accept() or last;
562: &status('Accepted connection');
563: # =============================================================================
564: # do something with the connection
565: # -----------------------------------------------------------------------------
566: $client->sockopt(SO_KEEPALIVE, 1);# Enable monitoring of
567: # connection liveness.
568: # see if we know client and check for spoof IP by challenge
569: my $caller=getpeername($client);
570: my ($port,$iaddr)=unpack_sockaddr_in($caller);
571: my $clientip=inet_ntoa($iaddr);
572: my $clientrec=($hostid{$clientip} ne undef);
573: &logthis(
574: "<font color=yellow>INFO: Connection $i, $clientip ($hostid{$clientip})</font>"
575: );
576: &status("Connecting $clientip ($hostid{$clientip})");
577: my $clientok;
578: if ($clientrec) {
579: &status("Waiting for init from $clientip ($hostid{$clientip})");
580: my $remotereq=<$client>;
581: $remotereq=~s/\W//g;
582: if ($remotereq eq 'init') {
583: my $challenge="$$".time;
584: print $client "$challenge\n";
585: &status(
586: "Waiting for challenge reply from $clientip ($hostid{$clientip})");
587: $remotereq=<$client>;
588: $remotereq=~s/\W//g;
589: if ($challenge eq $remotereq) {
590: $clientok=1;
591: print $client "ok\n";
592: } else {
593: &logthis(
594: "<font color=blue>WARNING: $clientip did not reply challenge</font>");
595: &status('No challenge reply '.$clientip);
596: }
597: } else {
598: &logthis(
599: "<font color=blue>WARNING: "
600: ."$clientip failed to initialize: >$remotereq< </font>");
601: &status('No init '.$clientip);
602: }
603: } else {
604: &logthis(
605: "<font color=blue>WARNING: Unknown client $clientip</font>");
606: &status('Hung up on '.$clientip);
607: }
608: if ($clientok) {
609: # ---------------- New known client connecting, could mean machine online again
610:
611: &reconlonc("$perlvar{'lonSockDir'}/$hostid{$clientip}");
612: &logthis(
613: "<font color=green>Established connection: $hostid{$clientip}</font>");
614: &status('Will listen to '.$hostid{$clientip});
615: # ------------------------------------------------------------ Process requests
616: while (my $userinput=<$client>) {
617: chomp($userinput);
618: Debug("Request = $userinput\n");
619: &status('Processing '.$hostid{$clientip}.': '.$userinput);
620: my $wasenc=0;
621: alarm(120);
622: # ------------------------------------------------------------ See if encrypted
623: if ($userinput =~ /^enc/) {
624: if ($cipher) {
625: my ($cmd,$cmdlength,$encinput)=split(/:/,$userinput);
626: $userinput='';
627: for (my $encidx=0;$encidx<length($encinput);$encidx+=16) {
628: $userinput.=
629: $cipher->decrypt(
630: pack("H16",substr($encinput,$encidx,16))
631: );
632: }
633: $userinput=substr($userinput,0,$cmdlength);
634: $wasenc=1;
635: }
636: }
637:
638: # ------------------------------------------------------------- Normal commands
639: # ------------------------------------------------------------------------ ping
640: if ($userinput =~ /^ping/) {
641: print $client "$perlvar{'lonHostID'}\n";
642: # ------------------------------------------------------------------------ pong
643: } elsif ($userinput =~ /^pong/) {
644: $reply=reply("ping",$hostid{$clientip});
645: print $client "$perlvar{'lonHostID'}:$reply\n";
646: # ------------------------------------------------------------------------ ekey
647: } elsif ($userinput =~ /^ekey/) {
648: my $buildkey=time.$$.int(rand 100000);
649: $buildkey=~tr/1-6/A-F/;
650: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
651: my $key=$perlvar{'lonHostID'}.$hostid{$clientip};
652: $key=~tr/a-z/A-Z/;
653: $key=~tr/G-P/0-9/;
654: $key=~tr/Q-Z/0-9/;
655: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
656: $key=substr($key,0,32);
657: my $cipherkey=pack("H32",$key);
658: $cipher=new IDEA $cipherkey;
659: print $client "$buildkey\n";
660: # ------------------------------------------------------------------------ load
661: } elsif ($userinput =~ /^load/) {
662: my $loadavg;
663: {
664: my $loadfile=IO::File->new('/proc/loadavg');
665: $loadavg=<$loadfile>;
666: }
667: $loadavg =~ s/\s.*//g;
668: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
669: print $client "$loadpercent\n";
670: # ----------------------------------------------------------------- currentauth
671: } elsif ($userinput =~ /^currentauth/) {
672: if ($wasenc==1) {
673: my ($cmd,$udom,$uname)=split(/:/,$userinput);
674: my $result = GetAuthType($udom, $uname);
675: if($result eq "nouser") {
676: print $client "unknown_user\n";
677: }
678: else {
679: print $client "$result\n"
680: }
681: } else {
682: print $client "refused\n";
683: }
684: # ------------------------------------------------------------------------ auth
685: } elsif ($userinput =~ /^auth/) {
686: if ($wasenc==1) {
687: my ($cmd,$udom,$uname,$upass)=split(/:/,$userinput);
688: chomp($upass);
689: $upass=unescape($upass);
690: my $proname=propath($udom,$uname);
691: my $passfilename="$proname/passwd";
692: if (-e $passfilename) {
693: my $pf = IO::File->new($passfilename);
694: my $realpasswd=<$pf>;
695: chomp($realpasswd);
696: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
697: my $pwdcorrect=0;
698: if ($howpwd eq 'internal') {
699: &Debug("Internal auth");
700: $pwdcorrect=
701: (crypt($upass,$contentpwd) eq $contentpwd);
702: } elsif ($howpwd eq 'unix') {
703: &Debug("Unix auth");
704: if((getpwnam($uname))[1] eq "") { #no such user!
705: $pwdcorrect = 0;
706: } else {
707: $contentpwd=(getpwnam($uname))[1];
708: my $pwauth_path="/usr/local/sbin/pwauth";
709: unless ($contentpwd eq 'x') {
710: $pwdcorrect=
711: (crypt($upass,$contentpwd) eq
712: $contentpwd);
713: }
714:
715: elsif (-e $pwauth_path) {
716: open PWAUTH, "|$pwauth_path" or
717: die "Cannot invoke authentication";
718: print PWAUTH "$uname\n$upass\n";
719: close PWAUTH;
720: $pwdcorrect=!$?;
721: }
722: }
723: } elsif ($howpwd eq 'krb4') {
724: $null=pack("C",0);
725: unless ($upass=~/$null/) {
726: $pwdcorrect=(
727: Authen::Krb4::get_pw_in_tkt($uname,"",
728: $contentpwd,'krbtgt',$contentpwd,1,
729: $upass) == 0);
730: } else { $pwdcorrect=0; }
731: } elsif ($howpwd eq 'krb5') {
732: $null=pack("C",0);
733: unless ($upass=~/$null/) {
734: my $krbclient=&Authen::Krb5::parse_name($uname.'@'.$contentpwd);
735: my $krbservice="krbtgt/".$contentpwd."\@".$contentpwd;
736: my $krbserver=&Authen::Krb5::parse_name($krbservice);
737: my $credentials=&Authen::Krb5::cc_default();
738: $credentials->initialize($krbclient);
739: my $krbreturn =
740: &Authen::Krb5::get_in_tkt_with_password(
741: $krbclient,$krbserver,$upass,$credentials);
742: # unless ($krbreturn) {
743: # &logthis("Krb5 Error: ".
744: # &Authen::Krb5::error());
745: # }
746: $pwdcorrect = ($krbreturn == 1);
747: } else { $pwdcorrect=0; }
748: } elsif ($howpwd eq 'localauth') {
749: $pwdcorrect=&localauth::localauth($uname,$upass,
750: $contentpwd);
751: }
752: if ($pwdcorrect) {
753: print $client "authorized\n";
754: } else {
755: print $client "non_authorized\n";
756: }
757: } else {
758: print $client "unknown_user\n";
759: }
760: } else {
761: print $client "refused\n";
762: }
763: # ---------------------------------------------------------------------- passwd
764: } elsif ($userinput =~ /^passwd/) {
765: if ($wasenc==1) {
766: my
767: ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
768: chomp($npass);
769: $upass=&unescape($upass);
770: $npass=&unescape($npass);
771: &Debug("Trying to change password for $uname");
772: my $proname=propath($udom,$uname);
773: my $passfilename="$proname/passwd";
774: if (-e $passfilename) {
775: my $realpasswd;
776: { my $pf = IO::File->new($passfilename);
777: $realpasswd=<$pf>; }
778: chomp($realpasswd);
779: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
780: if ($howpwd eq 'internal') {
781: &Debug("internal auth");
782: if (crypt($upass,$contentpwd) eq $contentpwd) {
783: my $salt=time;
784: $salt=substr($salt,6,2);
785: my $ncpass=crypt($npass,$salt);
786: { my $pf = IO::File->new(">$passfilename");
787: print $pf "internal:$ncpass\n"; }
788: &logthis("Result of password change for $uname: pwchange_success");
789: print $client "ok\n";
790: } else {
791: print $client "non_authorized\n";
792: }
793: } elsif ($howpwd eq 'unix') {
794: # Unix means we have to access /etc/password
795: # one way or another.
796: # First: Make sure the current password is
797: # correct
798: &Debug("auth is unix");
799: $contentpwd=(getpwnam($uname))[1];
800: my $pwdcorrect = "0";
801: my $pwauth_path="/usr/local/sbin/pwauth";
802: unless ($contentpwd eq 'x') {
803: $pwdcorrect=
804: (crypt($upass,$contentpwd) eq $contentpwd);
805: } elsif (-e $pwauth_path) {
806: open PWAUTH, "|$pwauth_path" or
807: die "Cannot invoke authentication";
808: print PWAUTH "$uname\n$upass\n";
809: close PWAUTH;
810: &Debug("exited pwauth with $? ($uname,$upass) ");
811: $pwdcorrect=($? == 0);
812: }
813: if ($pwdcorrect) {
814: my $execdir=$perlvar{'lonDaemons'};
815: &Debug("Opening lcpasswd pipeline");
816: my $pf = IO::File->new("|$execdir/lcpasswd > /home/www/lcpasswd.log");
817: print $pf "$uname\n$npass\n$npass\n";
818: close $pf;
819: my $err = $?;
820: my $result = ($err>0 ? 'pwchange_failure'
821: : 'ok');
822: &logthis("Result of password change for $uname: ".
823: &lcpasswdstrerror($?));
824: print $client "$result\n";
825: } else {
826: print $client "non_authorized\n";
827: }
828: } else {
829: print $client "auth_mode_error\n";
830: }
831: } else {
832: print $client "unknown_user\n";
833: }
834: } else {
835: print $client "refused\n";
836: }
837: # -------------------------------------------------------------------- makeuser
838: } elsif ($userinput =~ /^makeuser/) {
839: &Debug("Make user received");
840: my $oldumask=umask(0077);
841: if ($wasenc==1) {
842: my
843: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
844: &Debug("cmd =".$cmd." $udom =".$udom.
845: " uname=".$uname);
846: chomp($npass);
847: $npass=&unescape($npass);
848: my $proname=propath($udom,$uname);
849: my $passfilename="$proname/passwd";
850: &Debug("Password file created will be:".
851: $passfilename);
852: if (-e $passfilename) {
853: print $client "already_exists\n";
854: } elsif ($udom ne $perlvar{'lonDefDomain'}) {
855: print $client "not_right_domain\n";
856: } else {
857: @fpparts=split(/\//,$proname);
858: $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
859: $fperror='';
860: for ($i=3;$i<=$#fpparts;$i++) {
861: $fpnow.='/'.$fpparts[$i];
862: unless (-e $fpnow) {
863: unless (mkdir($fpnow,0777)) {
864: $fperror="error:$!";
865: }
866: }
867: }
868: unless ($fperror) {
869: my $result=&make_passwd_file($uname, $umode,$npass,
870: $passfilename);
871: print $client $result;
872: } else {
873: print $client "$fperror\n";
874: }
875: }
876: } else {
877: print $client "refused\n";
878: }
879: umask($oldumask);
880: # -------------------------------------------------------------- changeuserauth
881: } elsif ($userinput =~ /^changeuserauth/) {
882: &Debug("Changing authorization");
883: if ($wasenc==1) {
884: my
885: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
886: chomp($npass);
887: &Debug("cmd = ".$cmd." domain= ".$udom.
888: "uname =".$uname." umode= ".$umode);
889: $npass=&unescape($npass);
890: my $proname=&propath($udom,$uname);
891: my $passfilename="$proname/passwd";
892: if ($udom ne $perlvar{'lonDefDomain'}) {
893: print $client "not_right_domain\n";
894: } else {
895: my $result=&make_passwd_file($uname, $umode,$npass,
896: $passfilename);
897: print $client $result;
898: }
899: } else {
900: print $client "refused\n";
901: }
902: # ------------------------------------------------------------------------ home
903: } elsif ($userinput =~ /^home/) {
904: my ($cmd,$udom,$uname)=split(/:/,$userinput);
905: chomp($uname);
906: my $proname=propath($udom,$uname);
907: if (-e $proname) {
908: print $client "found\n";
909: } else {
910: print $client "not_found\n";
911: }
912: # ---------------------------------------------------------------------- update
913: } elsif ($userinput =~ /^update/) {
914: my ($cmd,$fname)=split(/:/,$userinput);
915: my $ownership=ishome($fname);
916: if ($ownership eq 'not_owner') {
917: if (-e $fname) {
918: my ($dev,$ino,$mode,$nlink,
919: $uid,$gid,$rdev,$size,
920: $atime,$mtime,$ctime,
921: $blksize,$blocks)=stat($fname);
922: $now=time;
923: $since=$now-$atime;
924: if ($since>$perlvar{'lonExpire'}) {
925: $reply=
926: reply("unsub:$fname","$hostid{$clientip}");
927: unlink("$fname");
928: } else {
929: my $transname="$fname.in.transfer";
930: my $remoteurl=
931: reply("sub:$fname","$hostid{$clientip}");
932: my $response;
933: {
934: my $ua=new LWP::UserAgent;
935: my $request=new HTTP::Request('GET',"$remoteurl");
936: $response=$ua->request($request,$transname);
937: }
938: if ($response->is_error()) {
939: unlink($transname);
940: my $message=$response->status_line;
941: &logthis(
942: "LWP GET: $message for $fname ($remoteurl)");
943: } else {
944: if ($remoteurl!~/\.meta$/) {
945: my $ua=new LWP::UserAgent;
946: my $mrequest=
947: new HTTP::Request('GET',$remoteurl.'.meta');
948: my $mresponse=
949: $ua->request($mrequest,$fname.'.meta');
950: if ($mresponse->is_error()) {
951: unlink($fname.'.meta');
952: }
953: }
954: rename($transname,$fname);
955: }
956: }
957: print $client "ok\n";
958: } else {
959: print $client "not_found\n";
960: }
961: } else {
962: print $client "rejected\n";
963: }
964: # -------------------------------------- fetch a user file from a remote server
965: } elsif ($userinput =~ /^fetchuserfile/) {
966: my ($cmd,$fname)=split(/:/,$userinput);
967: my ($udom,$uname,$ufile)=split(/\//,$fname);
968: my $udir=propath($udom,$uname).'/userfiles';
969: unless (-e $udir) { mkdir($udir,0770); }
970: if (-e $udir) {
971: $ufile=~s/^[\.\~]+//;
972: $ufile=~s/\///g;
973: my $transname=$udir.'/'.$ufile;
974: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
975: my $response;
976: {
977: my $ua=new LWP::UserAgent;
978: my $request=new HTTP::Request('GET',"$remoteurl");
979: $response=$ua->request($request,$transname);
980: }
981: if ($response->is_error()) {
982: unlink($transname);
983: my $message=$response->status_line;
984: &logthis(
985: "LWP GET: $message for $fname ($remoteurl)");
986: print $client "failed\n";
987: } else {
988: print $client "ok\n";
989: }
990: } else {
991: print $client "not_home\n";
992: }
993: # ------------------------------------------ authenticate access to a user file
994: } elsif ($userinput =~ /^tokenauthuserfile/) {
995: my ($cmd,$fname,$session)=split(/:/,$userinput);
996: chomp($session);
997: $reply='non_auth';
998: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
999: $session.'.id')) {
1000: while ($line=<ENVIN>) {
1001: if ($line=~/userfile\.$fname\=/) { $reply='ok'; }
1002: }
1003: close(ENVIN);
1004: print $client $reply."\n";
1005: } else {
1006: print $client "invalid_token\n";
1007: }
1008: # ----------------------------------------------------------------- unsubscribe
1009: } elsif ($userinput =~ /^unsub/) {
1010: my ($cmd,$fname)=split(/:/,$userinput);
1011: if (-e $fname) {
1012: print $client &unsub($client,$fname,$clientip);
1013: } else {
1014: print $client "not_found\n";
1015: }
1016: # ------------------------------------------------------------------- subscribe
1017: } elsif ($userinput =~ /^sub/) {
1018: print $client &subscribe($userinput,$clientip);
1019: # ------------------------------------------------------------- current version
1020: } elsif ($userinput =~ /^currentversion/) {
1021: my ($cmd,$fname)=split(/:/,$userinput);
1022: print $client ¤tversion($fname)."\n";
1023: # ------------------------------------------------------------------------- log
1024: } elsif ($userinput =~ /^log/) {
1025: my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
1026: chomp($what);
1027: my $proname=propath($udom,$uname);
1028: my $now=time;
1029: {
1030: my $hfh;
1031: if ($hfh=IO::File->new(">>$proname/activity.log")) {
1032: print $hfh "$now:$hostid{$clientip}:$what\n";
1033: print $client "ok\n";
1034: } else {
1035: print $client "error:$!\n";
1036: }
1037: }
1038: # ------------------------------------------------------------------------- put
1039: } elsif ($userinput =~ /^put/) {
1040: my ($cmd,$udom,$uname,$namespace,$what)
1041: =split(/:/,$userinput);
1042: $namespace=~s/\//\_/g;
1043: $namespace=~s/\W//g;
1044: if ($namespace ne 'roles') {
1045: chomp($what);
1046: my $proname=propath($udom,$uname);
1047: my $now=time;
1048: unless ($namespace=~/^nohist\_/) {
1049: my $hfh;
1050: if (
1051: $hfh=IO::File->new(">>$proname/$namespace.hist")
1052: ) { print $hfh "P:$now:$what\n"; }
1053: }
1054: my @pairs=split(/\&/,$what);
1055: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1056: foreach $pair (@pairs) {
1057: ($key,$value)=split(/=/,$pair);
1058: $hash{$key}=$value;
1059: }
1060: if (untie(%hash)) {
1061: print $client "ok\n";
1062: } else {
1063: print $client "error:$!\n";
1064: }
1065: } else {
1066: print $client "error:$!\n";
1067: }
1068: } else {
1069: print $client "refused\n";
1070: }
1071: # -------------------------------------------------------------------- rolesput
1072: } elsif ($userinput =~ /^rolesput/) {
1073: &Debug("rolesput");
1074: if ($wasenc==1) {
1075: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
1076: =split(/:/,$userinput);
1077: &Debug("cmd = ".$cmd." exedom= ".$exedom.
1078: "user = ".$exeuser." udom=".$udom.
1079: "what = ".$what);
1080: my $namespace='roles';
1081: chomp($what);
1082: my $proname=propath($udom,$uname);
1083: my $now=time;
1084: {
1085: my $hfh;
1086: if (
1087: $hfh=IO::File->new(">>$proname/$namespace.hist")
1088: ) {
1089: print $hfh "P:$now:$exedom:$exeuser:$what\n";
1090: }
1091: }
1092: my @pairs=split(/\&/,$what);
1093: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1094: foreach $pair (@pairs) {
1095: ($key,$value)=split(/=/,$pair);
1096: &ManagePermissions($key, $udom, $uname,
1097: &GetAuthType( $udom,
1098: $uname));
1099: $hash{$key}=$value;
1100:
1101: }
1102: if (untie(%hash)) {
1103: print $client "ok\n";
1104: } else {
1105: print $client "error:$!\n";
1106: }
1107: } else {
1108: print $client "error:$!\n";
1109: }
1110: } else {
1111: print $client "refused\n";
1112: }
1113: # ------------------------------------------------------------------------- get
1114: } elsif ($userinput =~ /^get/) {
1115: my ($cmd,$udom,$uname,$namespace,$what)
1116: =split(/:/,$userinput);
1117: $namespace=~s/\//\_/g;
1118: $namespace=~s/\W//g;
1119: chomp($what);
1120: my @queries=split(/\&/,$what);
1121: my $proname=propath($udom,$uname);
1122: my $qresult='';
1123: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1124: for ($i=0;$i<=$#queries;$i++) {
1125: $qresult.="$hash{$queries[$i]}&";
1126: }
1127: if (untie(%hash)) {
1128: $qresult=~s/\&$//;
1129: print $client "$qresult\n";
1130: } else {
1131: print $client "error:$!\n";
1132: }
1133: } else {
1134: print $client "error:$!\n";
1135: }
1136: # ------------------------------------------------------------------------ eget
1137: } elsif ($userinput =~ /^eget/) {
1138: my ($cmd,$udom,$uname,$namespace,$what)
1139: =split(/:/,$userinput);
1140: $namespace=~s/\//\_/g;
1141: $namespace=~s/\W//g;
1142: chomp($what);
1143: my @queries=split(/\&/,$what);
1144: my $proname=propath($udom,$uname);
1145: my $qresult='';
1146: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1147: for ($i=0;$i<=$#queries;$i++) {
1148: $qresult.="$hash{$queries[$i]}&";
1149: }
1150: if (untie(%hash)) {
1151: $qresult=~s/\&$//;
1152: if ($cipher) {
1153: my $cmdlength=length($qresult);
1154: $qresult.=" ";
1155: my $encqresult='';
1156: for
1157: (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
1158: $encqresult.=
1159: unpack("H16",
1160: $cipher->encrypt(substr($qresult,$encidx,8)));
1161: }
1162: print $client "enc:$cmdlength:$encqresult\n";
1163: } else {
1164: print $client "error:no_key\n";
1165: }
1166: } else {
1167: print $client "error:$!\n";
1168: }
1169: } else {
1170: print $client "error:$!\n";
1171: }
1172: # ------------------------------------------------------------------------- del
1173: } elsif ($userinput =~ /^del/) {
1174: my ($cmd,$udom,$uname,$namespace,$what)
1175: =split(/:/,$userinput);
1176: $namespace=~s/\//\_/g;
1177: $namespace=~s/\W//g;
1178: chomp($what);
1179: my $proname=propath($udom,$uname);
1180: my $now=time;
1181: unless ($namespace=~/^nohist\_/) {
1182: my $hfh;
1183: if (
1184: $hfh=IO::File->new(">>$proname/$namespace.hist")
1185: ) { print $hfh "D:$now:$what\n"; }
1186: }
1187: my @keys=split(/\&/,$what);
1188: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1189: foreach $key (@keys) {
1190: delete($hash{$key});
1191: }
1192: if (untie(%hash)) {
1193: print $client "ok\n";
1194: } else {
1195: print $client "error:$!\n";
1196: }
1197: } else {
1198: print $client "error:$!\n";
1199: }
1200: # ------------------------------------------------------------------------ keys
1201: } elsif ($userinput =~ /^keys/) {
1202: my ($cmd,$udom,$uname,$namespace)
1203: =split(/:/,$userinput);
1204: $namespace=~s/\//\_/g;
1205: $namespace=~s/\W//g;
1206: my $proname=propath($udom,$uname);
1207: my $qresult='';
1208: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1209: foreach $key (keys %hash) {
1210: $qresult.="$key&";
1211: }
1212: if (untie(%hash)) {
1213: $qresult=~s/\&$//;
1214: print $client "$qresult\n";
1215: } else {
1216: print $client "error:$!\n";
1217: }
1218: } else {
1219: print $client "error:$!\n";
1220: }
1221: # ------------------------------------------------------------------------ dump
1222: } elsif ($userinput =~ /^dump/) {
1223: my ($cmd,$udom,$uname,$namespace,$regexp)
1224: =split(/:/,$userinput);
1225: $namespace=~s/\//\_/g;
1226: $namespace=~s/\W//g;
1227: if (defined($regexp)) {
1228: $regexp=&unescape($regexp);
1229: } else {
1230: $regexp='.';
1231: }
1232: my $qresult='';
1233: my $proname=propath($udom,$uname);
1234: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1235: study($regexp);
1236: while (($key,$value) = each(%hash)) {
1237: if ($regexp eq '.') {
1238: $qresult.=$key.'='.$value.'&';
1239: } else {
1240: my $unescapeKey = &unescape($key);
1241: if (eval('$unescapeKey=~/$regexp/')) {
1242: $qresult.="$key=$value&";
1243: }
1244: }
1245: }
1246: if (untie(%hash)) {
1247: chop($qresult);
1248: print $client "$qresult\n";
1249: } else {
1250: print $client "error:$!\n";
1251: }
1252: } else {
1253: print $client "error:$!\n";
1254: }
1255: # ----------------------------------------------------------------------- store
1256: } elsif ($userinput =~ /^store/) {
1257: my ($cmd,$udom,$uname,$namespace,$rid,$what)
1258: =split(/:/,$userinput);
1259: $namespace=~s/\//\_/g;
1260: $namespace=~s/\W//g;
1261: if ($namespace ne 'roles') {
1262: chomp($what);
1263: my $proname=propath($udom,$uname);
1264: my $now=time;
1265: unless ($namespace=~/^nohist\_/) {
1266: my $hfh;
1267: if (
1268: $hfh=IO::File->new(">>$proname/$namespace.hist")
1269: ) { print $hfh "P:$now:$rid:$what\n"; }
1270: }
1271: my @pairs=split(/\&/,$what);
1272:
1273: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1274: my @previouskeys=split(/&/,$hash{"keys:$rid"});
1275: my $key;
1276: $hash{"version:$rid"}++;
1277: my $version=$hash{"version:$rid"};
1278: my $allkeys='';
1279: foreach $pair (@pairs) {
1280: ($key,$value)=split(/=/,$pair);
1281: $allkeys.=$key.':';
1282: $hash{"$version:$rid:$key"}=$value;
1283: }
1284: $hash{"$version:$rid:timestamp"}=$now;
1285: $allkeys.='timestamp';
1286: $hash{"$version:keys:$rid"}=$allkeys;
1287: if (untie(%hash)) {
1288: print $client "ok\n";
1289: } else {
1290: print $client "error:$!\n";
1291: }
1292: } else {
1293: print $client "error:$!\n";
1294: }
1295: } else {
1296: print $client "refused\n";
1297: }
1298: # --------------------------------------------------------------------- restore
1299: } elsif ($userinput =~ /^restore/) {
1300: my ($cmd,$udom,$uname,$namespace,$rid)
1301: =split(/:/,$userinput);
1302: $namespace=~s/\//\_/g;
1303: $namespace=~s/\W//g;
1304: chomp($rid);
1305: my $proname=propath($udom,$uname);
1306: my $qresult='';
1307: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1308: my $version=$hash{"version:$rid"};
1309: $qresult.="version=$version&";
1310: my $scope;
1311: for ($scope=1;$scope<=$version;$scope++) {
1312: my $vkeys=$hash{"$scope:keys:$rid"};
1313: my @keys=split(/:/,$vkeys);
1314: my $key;
1315: $qresult.="$scope:keys=$vkeys&";
1316: foreach $key (@keys) {
1317: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
1318: }
1319: }
1320: if (untie(%hash)) {
1321: $qresult=~s/\&$//;
1322: print $client "$qresult\n";
1323: } else {
1324: print $client "error:$!\n";
1325: }
1326: } else {
1327: print $client "error:$!\n";
1328: }
1329: # -------------------------------------------------------------------- chatsend
1330: } elsif ($userinput =~ /^chatsend/) {
1331: my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
1332: &chatadd($cdom,$cnum,$newpost);
1333: print $client "ok\n";
1334: # -------------------------------------------------------------------- chatretr
1335: } elsif ($userinput =~ /^chatretr/) {
1336: my ($cmd,$cdom,$cnum)=split(/\:/,$userinput);
1337: my $reply='';
1338: foreach (&getchat($cdom,$cnum)) {
1339: $reply.=&escape($_).':';
1340: }
1341: $reply=~s/\:$//;
1342: print $client $reply."\n";
1343: # ------------------------------------------------------------------- querysend
1344: } elsif ($userinput =~ /^querysend/) {
1345: my ($cmd,$query,
1346: $arg1,$arg2,$arg3)=split(/\:/,$userinput);
1347: $query=~s/\n*$//g;
1348: print $client "".
1349: sqlreply("$hostid{$clientip}\&$query".
1350: "\&$arg1"."\&$arg2"."\&$arg3")."\n";
1351: # ------------------------------------------------------------------ queryreply
1352: } elsif ($userinput =~ /^queryreply/) {
1353: my ($cmd,$id,$reply)=split(/:/,$userinput);
1354: my $store;
1355: my $execdir=$perlvar{'lonDaemons'};
1356: if ($store=IO::File->new(">$execdir/tmp/$id")) {
1357: $reply=~s/\&/\n/g;
1358: print $store $reply;
1359: close $store;
1360: my $store2=IO::File->new(">$execdir/tmp/$id.end");
1361: print $store2 "done\n";
1362: close $store2;
1363: print $client "ok\n";
1364: }
1365: else {
1366: print $client "error:$!\n";
1367: }
1368: # ----------------------------------------------------------------------- idput
1369: } elsif ($userinput =~ /^idput/) {
1370: my ($cmd,$udom,$what)=split(/:/,$userinput);
1371: chomp($what);
1372: $udom=~s/\W//g;
1373: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
1374: my $now=time;
1375: {
1376: my $hfh;
1377: if (
1378: $hfh=IO::File->new(">>$proname.hist")
1379: ) { print $hfh "P:$now:$what\n"; }
1380: }
1381: my @pairs=split(/\&/,$what);
1382: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT,0640)) {
1383: foreach $pair (@pairs) {
1384: ($key,$value)=split(/=/,$pair);
1385: $hash{$key}=$value;
1386: }
1387: if (untie(%hash)) {
1388: print $client "ok\n";
1389: } else {
1390: print $client "error:$!\n";
1391: }
1392: } else {
1393: print $client "error:$!\n";
1394: }
1395: # ----------------------------------------------------------------------- idget
1396: } elsif ($userinput =~ /^idget/) {
1397: my ($cmd,$udom,$what)=split(/:/,$userinput);
1398: chomp($what);
1399: $udom=~s/\W//g;
1400: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
1401: my @queries=split(/\&/,$what);
1402: my $qresult='';
1403: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER,0640)) {
1404: for ($i=0;$i<=$#queries;$i++) {
1405: $qresult.="$hash{$queries[$i]}&";
1406: }
1407: if (untie(%hash)) {
1408: $qresult=~s/\&$//;
1409: print $client "$qresult\n";
1410: } else {
1411: print $client "error:$!\n";
1412: }
1413: } else {
1414: print $client "error:$!\n";
1415: }
1416: # ---------------------------------------------------------------------- tmpput
1417: } elsif ($userinput =~ /^tmpput/) {
1418: my ($cmd,$what)=split(/:/,$userinput);
1419: my $store;
1420: $tmpsnum++;
1421: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
1422: $id=~s/\W/\_/g;
1423: $what=~s/\n//g;
1424: my $execdir=$perlvar{'lonDaemons'};
1425: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
1426: print $store $what;
1427: close $store;
1428: print $client "$id\n";
1429: }
1430: else {
1431: print $client "error:$!\n";
1432: }
1433:
1434: # ---------------------------------------------------------------------- tmpget
1435: } elsif ($userinput =~ /^tmpget/) {
1436: my ($cmd,$id)=split(/:/,$userinput);
1437: chomp($id);
1438: $id=~s/\W/\_/g;
1439: my $store;
1440: my $execdir=$perlvar{'lonDaemons'};
1441: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
1442: my $reply=<$store>;
1443: print $client "$reply\n";
1444: close $store;
1445: }
1446: else {
1447: print $client "error:$!\n";
1448: }
1449:
1450: # -------------------------------------------------------------------------- ls
1451: } elsif ($userinput =~ /^ls/) {
1452: my ($cmd,$ulsdir)=split(/:/,$userinput);
1453: my $ulsout='';
1454: my $ulsfn;
1455: if (-e $ulsdir) {
1456: if(-d $ulsdir) {
1457: if (opendir(LSDIR,$ulsdir)) {
1458: while ($ulsfn=readdir(LSDIR)) {
1459: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1460: $ulsout.=$ulsfn.'&'.
1461: join('&',@ulsstats).':';
1462: }
1463: closedir(LSDIR);
1464: }
1465: } else {
1466: my @ulsstats=stat($ulsdir);
1467: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1468: }
1469: } else {
1470: $ulsout='no_such_dir';
1471: }
1472: if ($ulsout eq '') { $ulsout='empty'; }
1473: print $client "$ulsout\n";
1474: # ------------------------------------------------------------------ Hanging up
1475: } elsif (($userinput =~ /^exit/) ||
1476: ($userinput =~ /^init/)) {
1477: &logthis(
1478: "Client $clientip ($hostid{$clientip}) hanging up: $userinput");
1479: print $client "bye\n";
1480: $client->close();
1481: last;
1482: # ------------------------------------------------------------- unknown command
1483: } else {
1484: # unknown command
1485: print $client "unknown_cmd\n";
1486: }
1487: # -------------------------------------------------------------------- complete
1488: alarm(0);
1489: &status('Listening to '.$hostid{$clientip});
1490: }
1491: # --------------------------------------------- client unknown or fishy, refuse
1492: } else {
1493: print $client "refused\n";
1494: $client->close();
1495: &logthis("<font color=blue>WARNING: "
1496: ."Rejected client $clientip, closing connection</font>");
1497: }
1498: }
1499:
1500: # =============================================================================
1501:
1502: &logthis("<font color=red>CRITICAL: "
1503: ."Disconnect from $clientip ($hostid{$clientip})</font>");
1504: # tidy up gracefully and finish
1505:
1506: $server->close();
1507:
1508: # this exit is VERY important, otherwise the child will become
1509: # a producer of more and more children, forking yourself into
1510: # process death.
1511: exit;
1512: }
1513: }
1514:
1515:
1516: #
1517: # Checks to see if the input roleput request was to set
1518: # an author role. If so, invokes the lchtmldir script to set
1519: # up a correct public_html
1520: # Parameters:
1521: # request - The request sent to the rolesput subchunk.
1522: # We're looking for /domain/_au
1523: # domain - The domain in which the user is having roles doctored.
1524: # user - Name of the user for which the role is being put.
1525: # authtype - The authentication type associated with the user.
1526: #
1527: sub ManagePermissions
1528: {
1529: my $request = shift;
1530: my $domain = shift;
1531: my $user = shift;
1532: my $authtype= shift;
1533:
1534: # See if the request is of the form /$domain/_au
1535:
1536: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
1537: my $execdir = $perlvar{'lonDaemons'};
1538: my $userhome= "/home/$user" ;
1539: Debug("system $execdir/lchtmldir $userhome $system $authtype");
1540: system("$execdir/lchtmldir $userhome $user $authtype");
1541: }
1542: }
1543: #
1544: # GetAuthType - Determines the authorization type of a user in a domain.
1545:
1546: # Returns the authorization type or nouser if there is no such user.
1547: #
1548: sub GetAuthType
1549: {
1550: my $domain = shift;
1551: my $user = shift;
1552:
1553: Debug("GetAuthType( $domain, $user ) \n");
1554: my $proname = &propath($domain, $user);
1555: my $passwdfile = "$proname/passwd";
1556: if( -e $passwdfile ) {
1557: my $pf = IO::File->new($passwdfile);
1558: my $realpassword = <$pf>;
1559: chomp($realpassword);
1560: Debug("Password info = $realpassword\n");
1561: my ($authtype, $contentpwd) = split(/:/, $realpassword);
1562: Debug("Authtype = $authtype, content = $contentpwd\n");
1563: my $availinfo = '';
1564: if($authtype eq 'krb4' or $authtype eq 'krb5') {
1565: $availinfo = $contentpwd;
1566: }
1567:
1568: return "$authtype:$availinfo";
1569: }
1570: else {
1571: Debug("Returning nouser");
1572: return "nouser";
1573: }
1574: }
1575:
1576: sub addline {
1577: my ($fname,$hostid,$ip,$newline)=@_;
1578: my $contents;
1579: my $found=0;
1580: my $expr='^'.$hostid.':'.$ip.':';
1581: $expr =~ s/\./\\\./g;
1582: if ($sh=IO::File->new("$fname.subscription")) {
1583: while (my $subline=<$sh>) {
1584: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
1585: }
1586: $sh->close();
1587: }
1588: $sh=IO::File->new(">$fname.subscription");
1589: if ($contents) { print $sh $contents; }
1590: if ($newline) { print $sh $newline; }
1591: $sh->close();
1592: return $found;
1593: }
1594:
1595: sub getchat {
1596: my ($cdom,$cname)=@_;
1597: my %hash;
1598: my $proname=&propath($cdom,$cname);
1599: my @entries=();
1600: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
1601: &GDBM_READER(),0640)) {
1602: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
1603: untie %hash;
1604: }
1605: return @entries;
1606: }
1607:
1608: sub chatadd {
1609: my ($cdom,$cname,$newchat)=@_;
1610: my %hash;
1611: my $proname=&propath($cdom,$cname);
1612: my @entries=();
1613: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
1614: &GDBM_WRCREAT(),0640)) {
1615: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
1616: my $time=time;
1617: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
1618: my ($thentime,$idnum)=split(/\_/,$lastid);
1619: my $newid=$time.'_000000';
1620: if ($thentime==$time) {
1621: $idnum=~s/^0+//;
1622: $idnum++;
1623: $idnum=substr('000000'.$idnum,-6,6);
1624: $newid=$time.'_'.$idnum;
1625: }
1626: $hash{$newid}=$newchat;
1627: my $expired=$time-3600;
1628: foreach (keys %hash) {
1629: my ($thistime)=($_=~/(\d+)\_/);
1630: if ($thistime<$expired) {
1631: delete $hash{$_};
1632: }
1633: }
1634: untie %hash;
1635: }
1636: }
1637:
1638: sub unsub {
1639: my ($fname,$clientip)=@_;
1640: my $result;
1641: if (unlink("$fname.$hostid{$clientip}")) {
1642: $result="ok\n";
1643: } else {
1644: $result="not_subscribed\n";
1645: }
1646: if (-e "$fname.subscription") {
1647: my $found=&addline($fname,$hostid{$clientip},$clientip,'');
1648: if ($found) { $result="ok\n"; }
1649: } else {
1650: if ($result != "ok\n") { $result="not_subscribed\n"; }
1651: }
1652: return $result;
1653: }
1654:
1655: sub currentversion {
1656: my $fname=shift;
1657: my $version=-1;
1658: my $ulsdir='';
1659: if ($fname=~/^(.+)\/[^\/]+$/) {
1660: $ulsdir=$1;
1661: }
1662: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
1663: $fname=~s/\.(\w+(?:\.meta)*)$/\.\(\\d\+\)\.$1\$/;
1664:
1665: if (-e $fname) { $version=1; }
1666: if (-e $ulsdir) {
1667: if(-d $ulsdir) {
1668: if (opendir(LSDIR,$ulsdir)) {
1669: while ($ulsfn=readdir(LSDIR)) {
1670: # see if this is a regular file (ignore links produced earlier)
1671: my $thisfile=$ulsdir.'/'.$ulsfn;
1672: unless (-l $thisfile) {
1673: if ($thisfile=~/$fname/) {
1674: if ($1>$version) { $version=$1; }
1675: }
1676: }
1677: }
1678: closedir(LSDIR);
1679: $version++;
1680: }
1681: }
1682: }
1683: return $version;
1684: }
1685:
1686: sub thisversion {
1687: my $fname=shift;
1688: my $version=-1;
1689: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
1690: $version=$1;
1691: }
1692: return $version;
1693: }
1694:
1695: sub subscribe {
1696: my ($userinput,$clientip)=@_;
1697: my $result;
1698: my ($cmd,$fname)=split(/:/,$userinput);
1699: my $ownership=&ishome($fname);
1700: if ($ownership eq 'owner') {
1701: # explitly asking for the current version?
1702: unless (-e $fname) {
1703: my $currentversion=¤tversion($fname);
1704: if (&thisversion($fname)==$currentversion) {
1705: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
1706: my $root=$1;
1707: my $extension=$2;
1708: symlink($root.'.'.$extension,
1709: $root.'.'.$currentversion.'.'.$extension);
1710: unless ($extension=~/\.meta$/) {
1711: symlink($root.'.'.$extension.'.meta',
1712: $root.'.'.$currentversion.'.'.$extension.'.meta');
1713: }
1714: }
1715: }
1716: }
1717: if (-e $fname) {
1718: if (-d $fname) {
1719: $result="directory\n";
1720: } else {
1721: if (-e "$fname.$hostid{$clientip}") {&unsub($fname,$clientip);}
1722: $now=time;
1723: my $found=&addline($fname,$hostid{$clientip},$clientip,
1724: "$hostid{$clientip}:$clientip:$now\n");
1725: if ($found) { $result="$fname\n"; }
1726: # if they were subscribed to only meta data, delete that
1727: # subscription, when you subscribe to a file you also get
1728: # the metadata
1729: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
1730: $fname=~s/\/home\/httpd\/html\/res/raw/;
1731: $fname="http://$thisserver/".$fname;
1732: $result="$fname\n";
1733: }
1734: } else {
1735: $result="not_found\n";
1736: }
1737: } else {
1738: $result="rejected\n";
1739: }
1740: return $result;
1741: }
1742:
1743: sub make_passwd_file {
1744: my ($uname, $umode,$npass,$passfilename)=@_;
1745: my $result="ok\n";
1746: if ($umode eq 'krb4' or $umode eq 'krb5') {
1747: {
1748: my $pf = IO::File->new(">$passfilename");
1749: print $pf "$umode:$npass\n";
1750: }
1751: } elsif ($umode eq 'internal') {
1752: my $salt=time;
1753: $salt=substr($salt,6,2);
1754: my $ncpass=crypt($npass,$salt);
1755: {
1756: &Debug("Creating internal auth");
1757: my $pf = IO::File->new(">$passfilename");
1758: print $pf "internal:$ncpass\n";
1759: }
1760: } elsif ($umode eq 'localauth') {
1761: {
1762: my $pf = IO::File->new(">$passfilename");
1763: print $pf "localauth:$npass\n";
1764: }
1765: } elsif ($umode eq 'unix') {
1766: {
1767: my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
1768: {
1769: &Debug("Executing external: ".$execpath);
1770: &Debug("user = ".$uname.", Password =". $npass);
1771: my $se = IO::File->new("|$execpath > /home/www/lcuseradd.log");
1772: print $se "$uname\n";
1773: print $se "$npass\n";
1774: print $se "$npass\n";
1775: }
1776: my $useraddok = $?;
1777: if($useraddok > 0) {
1778: &logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));
1779: }
1780: my $pf = IO::File->new(">$passfilename");
1781: print $pf "unix:\n";
1782: }
1783: } elsif ($umode eq 'none') {
1784: {
1785: my $pf = IO::File->new(">$passfilename");
1786: print $pf "none:\n";
1787: }
1788: } else {
1789: $result="auth_mode_error\n";
1790: }
1791: return $result;
1792: }
1793:
1794: # ----------------------------------- POD (plain old documentation, CPAN style)
1795:
1796: =head1 NAME
1797:
1798: lond - "LON Daemon" Server (port "LOND" 5663)
1799:
1800: =head1 SYNOPSIS
1801:
1802: Usage: B<lond>
1803:
1804: Should only be run as user=www. This is a command-line script which
1805: is invoked by B<loncron>. There is no expectation that a typical user
1806: will manually start B<lond> from the command-line. (In other words,
1807: DO NOT START B<lond> YOURSELF.)
1808:
1809: =head1 DESCRIPTION
1810:
1811: There are two characteristics associated with the running of B<lond>,
1812: PROCESS MANAGEMENT (starting, stopping, handling child processes)
1813: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
1814: subscriptions, etc). These are described in two large
1815: sections below.
1816:
1817: B<PROCESS MANAGEMENT>
1818:
1819: Preforker - server who forks first. Runs as a daemon. HUPs.
1820: Uses IDEA encryption
1821:
1822: B<lond> forks off children processes that correspond to the other servers
1823: in the network. Management of these processes can be done at the
1824: parent process level or the child process level.
1825:
1826: B<logs/lond.log> is the location of log messages.
1827:
1828: The process management is now explained in terms of linux shell commands,
1829: subroutines internal to this code, and signal assignments:
1830:
1831: =over 4
1832:
1833: =item *
1834:
1835: PID is stored in B<logs/lond.pid>
1836:
1837: This is the process id number of the parent B<lond> process.
1838:
1839: =item *
1840:
1841: SIGTERM and SIGINT
1842:
1843: Parent signal assignment:
1844: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
1845:
1846: Child signal assignment:
1847: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
1848: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
1849: to restart a new child.)
1850:
1851: Command-line invocations:
1852: B<kill> B<-s> SIGTERM I<PID>
1853: B<kill> B<-s> SIGINT I<PID>
1854:
1855: Subroutine B<HUNTSMAN>:
1856: This is only invoked for the B<lond> parent I<PID>.
1857: This kills all the children, and then the parent.
1858: The B<lonc.pid> file is cleared.
1859:
1860: =item *
1861:
1862: SIGHUP
1863:
1864: Current bug:
1865: This signal can only be processed the first time
1866: on the parent process. Subsequent SIGHUP signals
1867: have no effect.
1868:
1869: Parent signal assignment:
1870: $SIG{HUP} = \&HUPSMAN;
1871:
1872: Child signal assignment:
1873: none (nothing happens)
1874:
1875: Command-line invocations:
1876: B<kill> B<-s> SIGHUP I<PID>
1877:
1878: Subroutine B<HUPSMAN>:
1879: This is only invoked for the B<lond> parent I<PID>,
1880: This kills all the children, and then the parent.
1881: The B<lond.pid> file is cleared.
1882:
1883: =item *
1884:
1885: SIGUSR1
1886:
1887: Parent signal assignment:
1888: $SIG{USR1} = \&USRMAN;
1889:
1890: Child signal assignment:
1891: $SIG{USR1}= \&logstatus;
1892:
1893: Command-line invocations:
1894: B<kill> B<-s> SIGUSR1 I<PID>
1895:
1896: Subroutine B<USRMAN>:
1897: When invoked for the B<lond> parent I<PID>,
1898: SIGUSR1 is sent to all the children, and the status of
1899: each connection is logged.
1900:
1901: =item *
1902:
1903: SIGCHLD
1904:
1905: Parent signal assignment:
1906: $SIG{CHLD} = \&REAPER;
1907:
1908: Child signal assignment:
1909: none
1910:
1911: Command-line invocations:
1912: B<kill> B<-s> SIGCHLD I<PID>
1913:
1914: Subroutine B<REAPER>:
1915: This is only invoked for the B<lond> parent I<PID>.
1916: Information pertaining to the child is removed.
1917: The socket port is cleaned up.
1918:
1919: =back
1920:
1921: B<SERVER-SIDE ACTIVITIES>
1922:
1923: Server-side information can be accepted in an encrypted or non-encrypted
1924: method.
1925:
1926: =over 4
1927:
1928: =item ping
1929:
1930: Query a client in the hosts.tab table; "Are you there?"
1931:
1932: =item pong
1933:
1934: Respond to a ping query.
1935:
1936: =item ekey
1937:
1938: Read in encrypted key, make cipher. Respond with a buildkey.
1939:
1940: =item load
1941:
1942: Respond with CPU load based on a computation upon /proc/loadavg.
1943:
1944: =item currentauth
1945:
1946: Reply with current authentication information (only over an
1947: encrypted channel).
1948:
1949: =item auth
1950:
1951: Only over an encrypted channel, reply as to whether a user's
1952: authentication information can be validated.
1953:
1954: =item passwd
1955:
1956: Allow for a password to be set.
1957:
1958: =item makeuser
1959:
1960: Make a user.
1961:
1962: =item passwd
1963:
1964: Allow for authentication mechanism and password to be changed.
1965:
1966: =item home
1967:
1968: Respond to a question "are you the home for a given user?"
1969:
1970: =item update
1971:
1972: Update contents of a subscribed resource.
1973:
1974: =item unsubscribe
1975:
1976: The server is unsubscribing from a resource.
1977:
1978: =item subscribe
1979:
1980: The server is subscribing to a resource.
1981:
1982: =item log
1983:
1984: Place in B<logs/lond.log>
1985:
1986: =item put
1987:
1988: stores hash in namespace
1989:
1990: =item rolesput
1991:
1992: put a role into a user's environment
1993:
1994: =item get
1995:
1996: returns hash with keys from array
1997: reference filled in from namespace
1998:
1999: =item eget
2000:
2001: returns hash with keys from array
2002: reference filled in from namesp (encrypts the return communication)
2003:
2004: =item rolesget
2005:
2006: get a role from a user's environment
2007:
2008: =item del
2009:
2010: deletes keys out of array from namespace
2011:
2012: =item keys
2013:
2014: returns namespace keys
2015:
2016: =item dump
2017:
2018: dumps the complete (or key matching regexp) namespace into a hash
2019:
2020: =item store
2021:
2022: stores hash permanently
2023: for this url; hashref needs to be given and should be a \%hashname; the
2024: remaining args aren't required and if they aren't passed or are '' they will
2025: be derived from the ENV
2026:
2027: =item restore
2028:
2029: returns a hash for a given url
2030:
2031: =item querysend
2032:
2033: Tells client about the lonsql process that has been launched in response
2034: to a sent query.
2035:
2036: =item queryreply
2037:
2038: Accept information from lonsql and make appropriate storage in temporary
2039: file space.
2040:
2041: =item idput
2042:
2043: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
2044: for each student, defined perhaps by the institutional Registrar.)
2045:
2046: =item idget
2047:
2048: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
2049: for each student, defined perhaps by the institutional Registrar.)
2050:
2051: =item tmpput
2052:
2053: Accept and store information in temporary space.
2054:
2055: =item tmpget
2056:
2057: Send along temporarily stored information.
2058:
2059: =item ls
2060:
2061: List part of a user's directory.
2062:
2063: =item Hanging up (exit or init)
2064:
2065: What to do when a client tells the server that they (the client)
2066: are leaving the network.
2067:
2068: =item unknown command
2069:
2070: If B<lond> is sent an unknown command (not in the list above),
2071: it replys to the client "unknown_cmd".
2072:
2073: =item UNKNOWN CLIENT
2074:
2075: If the anti-spoofing algorithm cannot verify the client,
2076: the client is rejected (with a "refused" message sent
2077: to the client, and the connection is closed.
2078:
2079: =back
2080:
2081: =head1 PREREQUISITES
2082:
2083: IO::Socket
2084: IO::File
2085: Apache::File
2086: Symbol
2087: POSIX
2088: Crypt::IDEA
2089: LWP::UserAgent()
2090: GDBM_File
2091: Authen::Krb4
2092: Authen::Krb5
2093:
2094: =head1 COREQUISITES
2095:
2096: =head1 OSNAMES
2097:
2098: linux
2099:
2100: =head1 SCRIPT CATEGORIES
2101:
2102: Server/Process
2103:
2104: =cut
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