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[LON-CAPA] /
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lond
Revision
1.107:
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Wed Jan 15 19:34:02 2003 UTC (21 years, 3 months ago) by
matthew
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MAIN
CVS tags:
HEAD
Rename dumpcurrent to currentdump
lond: fixed 1D10T bug in code. $value was used instead of $v (version).
lonspreadsheet: now call lonnet::currentdump, removed debugging code and
code that was commented out.
lonnet:renamed dumpcurrent to currentdump. currentdump will now deal
transparently with old lond's that do not support currentdump.
1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.107 2003/01/15 19:34:02 matthew 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: # 01/xx/2003 Ron Fox.. Remove preforking. This makes the general daemon
58: # logic simpler (and there were problems maintaining the preforked
59: # population). Since the time averaged connection rate is close to zero
60: # because lonc's purpose is to maintain near continuous connnections,
61: # preforking is not really needed.
62: ###
63:
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:
495:
496: # ----------------------------------------------------- Install signal handlers
497:
498:
499: $SIG{CHLD} = \&REAPER;
500: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
501: $SIG{HUP} = \&HUPSMAN;
502: $SIG{USR1} = \&checkchildren;
503:
504:
505:
506: # --------------------------------------------------------------
507: # Accept connections. When a connection comes in, it is validated
508: # and if good, a child process is created to process transactions
509: # along the connection.
510:
511: while (1) {
512: $client = $server->accept() or next;
513: make_new_child($client);
514: }
515:
516: sub make_new_child {
517: my $client;
518: my $pid;
519: my $cipher;
520: my $sigset;
521:
522: $client = shift;
523: &logthis("Attempting to start child");
524: # block signal for fork
525: $sigset = POSIX::SigSet->new(SIGINT);
526: sigprocmask(SIG_BLOCK, $sigset)
527: or die "Can't block SIGINT for fork: $!\n";
528:
529: die "fork: $!" unless defined ($pid = fork);
530:
531: if ($pid) {
532: # Parent records the child's birth and returns.
533: sigprocmask(SIG_UNBLOCK, $sigset)
534: or die "Can't unblock SIGINT for fork: $!\n";
535: $children{$pid} = 1;
536: $children++;
537: &status('Started child '.$pid);
538: return;
539: } else {
540: # Child can *not* return from this subroutine.
541: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
542: $SIG{USR1}= \&logstatus;
543: $SIG{ALRM}= \&timeout;
544: $lastlog='Forked ';
545: $status='Forked';
546:
547: # unblock signals
548: sigprocmask(SIG_UNBLOCK, $sigset)
549: or die "Can't unblock SIGINT for fork: $!\n";
550:
551: $tmpsnum=0;
552: #---------------------------------------------------- kerberos 5 initialization
553: &Authen::Krb5::init_context();
554: &Authen::Krb5::init_ets();
555:
556: &status('Accepted connection');
557: # =============================================================================
558: # do something with the connection
559: # -----------------------------------------------------------------------------
560: $client->sockopt(SO_KEEPALIVE, 1);# Enable monitoring of
561: # connection liveness.
562: # see if we know client and check for spoof IP by challenge
563: my $caller = getpeername($client);
564: my ($port,$iaddr)=unpack_sockaddr_in($caller);
565: my $clientip=inet_ntoa($iaddr);
566: my $clientrec=($hostid{$clientip} ne undef);
567: &logthis(
568: "<font color=yellow>INFO: Connection $i, $clientip ($hostid{$clientip})</font>"
569: );
570: &status("Connecting $clientip ($hostid{$clientip})");
571: my $clientok;
572: if ($clientrec) {
573: &status("Waiting for init from $clientip ($hostid{$clientip})");
574: my $remotereq=<$client>;
575: $remotereq=~s/\W//g;
576: if ($remotereq eq 'init') {
577: my $challenge="$$".time;
578: print $client "$challenge\n";
579: &status(
580: "Waiting for challenge reply from $clientip ($hostid{$clientip})");
581: $remotereq=<$client>;
582: $remotereq=~s/\W//g;
583: if ($challenge eq $remotereq) {
584: $clientok=1;
585: print $client "ok\n";
586: } else {
587: &logthis(
588: "<font color=blue>WARNING: $clientip did not reply challenge</font>");
589: &status('No challenge reply '.$clientip);
590: }
591: } else {
592: &logthis(
593: "<font color=blue>WARNING: "
594: ."$clientip failed to initialize: >$remotereq< </font>");
595: &status('No init '.$clientip);
596: }
597: } else {
598: &logthis(
599: "<font color=blue>WARNING: Unknown client $clientip</font>");
600: &status('Hung up on '.$clientip);
601: }
602: if ($clientok) {
603: # ---------------- New known client connecting, could mean machine online again
604:
605: &reconlonc("$perlvar{'lonSockDir'}/$hostid{$clientip}");
606: &logthis(
607: "<font color=green>Established connection: $hostid{$clientip}</font>");
608: &status('Will listen to '.$hostid{$clientip});
609: # ------------------------------------------------------------ Process requests
610: while (my $userinput=<$client>) {
611: chomp($userinput);
612: Debug("Request = $userinput\n");
613: &status('Processing '.$hostid{$clientip}.': '.$userinput);
614: my $wasenc=0;
615: alarm(120);
616: # ------------------------------------------------------------ See if encrypted
617: if ($userinput =~ /^enc/) {
618: if ($cipher) {
619: my ($cmd,$cmdlength,$encinput)=split(/:/,$userinput);
620: $userinput='';
621: for (my $encidx=0;$encidx<length($encinput);$encidx+=16) {
622: $userinput.=
623: $cipher->decrypt(
624: pack("H16",substr($encinput,$encidx,16))
625: );
626: }
627: $userinput=substr($userinput,0,$cmdlength);
628: $wasenc=1;
629: }
630: }
631:
632: # ------------------------------------------------------------- Normal commands
633: # ------------------------------------------------------------------------ ping
634: if ($userinput =~ /^ping/) {
635: print $client "$perlvar{'lonHostID'}\n";
636: # ------------------------------------------------------------------------ pong
637: } elsif ($userinput =~ /^pong/) {
638: $reply=reply("ping",$hostid{$clientip});
639: print $client "$perlvar{'lonHostID'}:$reply\n";
640: # ------------------------------------------------------------------------ ekey
641: } elsif ($userinput =~ /^ekey/) {
642: my $buildkey=time.$$.int(rand 100000);
643: $buildkey=~tr/1-6/A-F/;
644: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
645: my $key=$perlvar{'lonHostID'}.$hostid{$clientip};
646: $key=~tr/a-z/A-Z/;
647: $key=~tr/G-P/0-9/;
648: $key=~tr/Q-Z/0-9/;
649: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
650: $key=substr($key,0,32);
651: my $cipherkey=pack("H32",$key);
652: $cipher=new IDEA $cipherkey;
653: print $client "$buildkey\n";
654: # ------------------------------------------------------------------------ load
655: } elsif ($userinput =~ /^load/) {
656: my $loadavg;
657: {
658: my $loadfile=IO::File->new('/proc/loadavg');
659: $loadavg=<$loadfile>;
660: }
661: $loadavg =~ s/\s.*//g;
662: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
663: print $client "$loadpercent\n";
664: # ----------------------------------------------------------------- currentauth
665: } elsif ($userinput =~ /^currentauth/) {
666: if ($wasenc==1) {
667: my ($cmd,$udom,$uname)=split(/:/,$userinput);
668: my $result = GetAuthType($udom, $uname);
669: if($result eq "nouser") {
670: print $client "unknown_user\n";
671: }
672: else {
673: print $client "$result\n"
674: }
675: } else {
676: print $client "refused\n";
677: }
678: # ------------------------------------------------------------------------ auth
679: } elsif ($userinput =~ /^auth/) {
680: if ($wasenc==1) {
681: my ($cmd,$udom,$uname,$upass)=split(/:/,$userinput);
682: chomp($upass);
683: $upass=unescape($upass);
684: my $proname=propath($udom,$uname);
685: my $passfilename="$proname/passwd";
686: if (-e $passfilename) {
687: my $pf = IO::File->new($passfilename);
688: my $realpasswd=<$pf>;
689: chomp($realpasswd);
690: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
691: my $pwdcorrect=0;
692: if ($howpwd eq 'internal') {
693: &Debug("Internal auth");
694: $pwdcorrect=
695: (crypt($upass,$contentpwd) eq $contentpwd);
696: } elsif ($howpwd eq 'unix') {
697: &Debug("Unix auth");
698: if((getpwnam($uname))[1] eq "") { #no such user!
699: $pwdcorrect = 0;
700: } else {
701: $contentpwd=(getpwnam($uname))[1];
702: my $pwauth_path="/usr/local/sbin/pwauth";
703: unless ($contentpwd eq 'x') {
704: $pwdcorrect=
705: (crypt($upass,$contentpwd) eq
706: $contentpwd);
707: }
708:
709: elsif (-e $pwauth_path) {
710: open PWAUTH, "|$pwauth_path" or
711: die "Cannot invoke authentication";
712: print PWAUTH "$uname\n$upass\n";
713: close PWAUTH;
714: $pwdcorrect=!$?;
715: }
716: }
717: } elsif ($howpwd eq 'krb4') {
718: $null=pack("C",0);
719: unless ($upass=~/$null/) {
720: my $krb4_error = &Authen::Krb4::get_pw_in_tkt
721: ($uname,"",$contentpwd,'krbtgt',
722: $contentpwd,1,$upass);
723: if (!$krb4_error) {
724: $pwdcorrect = 1;
725: } else {
726: $pwdcorrect=0;
727: # log error if it is not a bad password
728: if ($krb4_error != 62) {
729: &logthis('krb4:'.$uname.','.$contentpwd.','.
730: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
731: }
732: }
733: }
734: } elsif ($howpwd eq 'krb5') {
735: $null=pack("C",0);
736: unless ($upass=~/$null/) {
737: my $krbclient=&Authen::Krb5::parse_name($uname.'@'.$contentpwd);
738: my $krbservice="krbtgt/".$contentpwd."\@".$contentpwd;
739: my $krbserver=&Authen::Krb5::parse_name($krbservice);
740: my $credentials=&Authen::Krb5::cc_default();
741: $credentials->initialize($krbclient);
742: my $krbreturn =
743: &Authen::Krb5::get_in_tkt_with_password(
744: $krbclient,$krbserver,$upass,$credentials);
745: # unless ($krbreturn) {
746: # &logthis("Krb5 Error: ".
747: # &Authen::Krb5::error());
748: # }
749: $pwdcorrect = ($krbreturn == 1);
750: } else { $pwdcorrect=0; }
751: } elsif ($howpwd eq 'localauth') {
752: $pwdcorrect=&localauth::localauth($uname,$upass,
753: $contentpwd);
754: }
755: if ($pwdcorrect) {
756: print $client "authorized\n";
757: } else {
758: print $client "non_authorized\n";
759: }
760: } else {
761: print $client "unknown_user\n";
762: }
763: } else {
764: print $client "refused\n";
765: }
766: # ---------------------------------------------------------------------- passwd
767: } elsif ($userinput =~ /^passwd/) {
768: if ($wasenc==1) {
769: my
770: ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
771: chomp($npass);
772: $upass=&unescape($upass);
773: $npass=&unescape($npass);
774: &Debug("Trying to change password for $uname");
775: my $proname=propath($udom,$uname);
776: my $passfilename="$proname/passwd";
777: if (-e $passfilename) {
778: my $realpasswd;
779: { my $pf = IO::File->new($passfilename);
780: $realpasswd=<$pf>; }
781: chomp($realpasswd);
782: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
783: if ($howpwd eq 'internal') {
784: &Debug("internal auth");
785: if (crypt($upass,$contentpwd) eq $contentpwd) {
786: my $salt=time;
787: $salt=substr($salt,6,2);
788: my $ncpass=crypt($npass,$salt);
789: { my $pf = IO::File->new(">$passfilename");
790: print $pf "internal:$ncpass\n"; }
791: &logthis("Result of password change for $uname: pwchange_success");
792: print $client "ok\n";
793: } else {
794: print $client "non_authorized\n";
795: }
796: } elsif ($howpwd eq 'unix') {
797: # Unix means we have to access /etc/password
798: # one way or another.
799: # First: Make sure the current password is
800: # correct
801: &Debug("auth is unix");
802: $contentpwd=(getpwnam($uname))[1];
803: my $pwdcorrect = "0";
804: my $pwauth_path="/usr/local/sbin/pwauth";
805: unless ($contentpwd eq 'x') {
806: $pwdcorrect=
807: (crypt($upass,$contentpwd) eq $contentpwd);
808: } elsif (-e $pwauth_path) {
809: open PWAUTH, "|$pwauth_path" or
810: die "Cannot invoke authentication";
811: print PWAUTH "$uname\n$upass\n";
812: close PWAUTH;
813: &Debug("exited pwauth with $? ($uname,$upass) ");
814: $pwdcorrect=($? == 0);
815: }
816: if ($pwdcorrect) {
817: my $execdir=$perlvar{'lonDaemons'};
818: &Debug("Opening lcpasswd pipeline");
819: my $pf = IO::File->new("|$execdir/lcpasswd > /home/www/lcpasswd.log");
820: print $pf "$uname\n$npass\n$npass\n";
821: close $pf;
822: my $err = $?;
823: my $result = ($err>0 ? 'pwchange_failure'
824: : 'ok');
825: &logthis("Result of password change for $uname: ".
826: &lcpasswdstrerror($?));
827: print $client "$result\n";
828: } else {
829: print $client "non_authorized\n";
830: }
831: } else {
832: print $client "auth_mode_error\n";
833: }
834: } else {
835: print $client "unknown_user\n";
836: }
837: } else {
838: print $client "refused\n";
839: }
840: # -------------------------------------------------------------------- makeuser
841: } elsif ($userinput =~ /^makeuser/) {
842: &Debug("Make user received");
843: my $oldumask=umask(0077);
844: if ($wasenc==1) {
845: my
846: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
847: &Debug("cmd =".$cmd." $udom =".$udom.
848: " uname=".$uname);
849: chomp($npass);
850: $npass=&unescape($npass);
851: my $proname=propath($udom,$uname);
852: my $passfilename="$proname/passwd";
853: &Debug("Password file created will be:".
854: $passfilename);
855: if (-e $passfilename) {
856: print $client "already_exists\n";
857: } elsif ($udom ne $perlvar{'lonDefDomain'}) {
858: print $client "not_right_domain\n";
859: } else {
860: @fpparts=split(/\//,$proname);
861: $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
862: $fperror='';
863: for ($i=3;$i<=$#fpparts;$i++) {
864: $fpnow.='/'.$fpparts[$i];
865: unless (-e $fpnow) {
866: unless (mkdir($fpnow,0777)) {
867: $fperror="error:$!";
868: }
869: }
870: }
871: unless ($fperror) {
872: my $result=&make_passwd_file($uname, $umode,$npass,
873: $passfilename);
874: print $client $result;
875: } else {
876: print $client "$fperror\n";
877: }
878: }
879: } else {
880: print $client "refused\n";
881: }
882: umask($oldumask);
883: # -------------------------------------------------------------- changeuserauth
884: } elsif ($userinput =~ /^changeuserauth/) {
885: &Debug("Changing authorization");
886: if ($wasenc==1) {
887: my
888: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
889: chomp($npass);
890: &Debug("cmd = ".$cmd." domain= ".$udom.
891: "uname =".$uname." umode= ".$umode);
892: $npass=&unescape($npass);
893: my $proname=&propath($udom,$uname);
894: my $passfilename="$proname/passwd";
895: if ($udom ne $perlvar{'lonDefDomain'}) {
896: print $client "not_right_domain\n";
897: } else {
898: my $result=&make_passwd_file($uname, $umode,$npass,
899: $passfilename);
900: print $client $result;
901: }
902: } else {
903: print $client "refused\n";
904: }
905: # ------------------------------------------------------------------------ home
906: } elsif ($userinput =~ /^home/) {
907: my ($cmd,$udom,$uname)=split(/:/,$userinput);
908: chomp($uname);
909: my $proname=propath($udom,$uname);
910: if (-e $proname) {
911: print $client "found\n";
912: } else {
913: print $client "not_found\n";
914: }
915: # ---------------------------------------------------------------------- update
916: } elsif ($userinput =~ /^update/) {
917: my ($cmd,$fname)=split(/:/,$userinput);
918: my $ownership=ishome($fname);
919: if ($ownership eq 'not_owner') {
920: if (-e $fname) {
921: my ($dev,$ino,$mode,$nlink,
922: $uid,$gid,$rdev,$size,
923: $atime,$mtime,$ctime,
924: $blksize,$blocks)=stat($fname);
925: $now=time;
926: $since=$now-$atime;
927: if ($since>$perlvar{'lonExpire'}) {
928: $reply=
929: reply("unsub:$fname","$hostid{$clientip}");
930: unlink("$fname");
931: } else {
932: my $transname="$fname.in.transfer";
933: my $remoteurl=
934: reply("sub:$fname","$hostid{$clientip}");
935: my $response;
936: {
937: my $ua=new LWP::UserAgent;
938: my $request=new HTTP::Request('GET',"$remoteurl");
939: $response=$ua->request($request,$transname);
940: }
941: if ($response->is_error()) {
942: unlink($transname);
943: my $message=$response->status_line;
944: &logthis(
945: "LWP GET: $message for $fname ($remoteurl)");
946: } else {
947: if ($remoteurl!~/\.meta$/) {
948: my $ua=new LWP::UserAgent;
949: my $mrequest=
950: new HTTP::Request('GET',$remoteurl.'.meta');
951: my $mresponse=
952: $ua->request($mrequest,$fname.'.meta');
953: if ($mresponse->is_error()) {
954: unlink($fname.'.meta');
955: }
956: }
957: rename($transname,$fname);
958: }
959: }
960: print $client "ok\n";
961: } else {
962: print $client "not_found\n";
963: }
964: } else {
965: print $client "rejected\n";
966: }
967: # -------------------------------------- fetch a user file from a remote server
968: } elsif ($userinput =~ /^fetchuserfile/) {
969: my ($cmd,$fname)=split(/:/,$userinput);
970: my ($udom,$uname,$ufile)=split(/\//,$fname);
971: my $udir=propath($udom,$uname).'/userfiles';
972: unless (-e $udir) { mkdir($udir,0770); }
973: if (-e $udir) {
974: $ufile=~s/^[\.\~]+//;
975: $ufile=~s/\///g;
976: my $transname=$udir.'/'.$ufile;
977: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
978: my $response;
979: {
980: my $ua=new LWP::UserAgent;
981: my $request=new HTTP::Request('GET',"$remoteurl");
982: $response=$ua->request($request,$transname);
983: }
984: if ($response->is_error()) {
985: unlink($transname);
986: my $message=$response->status_line;
987: &logthis(
988: "LWP GET: $message for $fname ($remoteurl)");
989: print $client "failed\n";
990: } else {
991: print $client "ok\n";
992: }
993: } else {
994: print $client "not_home\n";
995: }
996: # ------------------------------------------ authenticate access to a user file
997: } elsif ($userinput =~ /^tokenauthuserfile/) {
998: my ($cmd,$fname,$session)=split(/:/,$userinput);
999: chomp($session);
1000: $reply='non_auth';
1001: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
1002: $session.'.id')) {
1003: while ($line=<ENVIN>) {
1004: if ($line=~/userfile\.$fname\=/) { $reply='ok'; }
1005: }
1006: close(ENVIN);
1007: print $client $reply."\n";
1008: } else {
1009: print $client "invalid_token\n";
1010: }
1011: # ----------------------------------------------------------------- unsubscribe
1012: } elsif ($userinput =~ /^unsub/) {
1013: my ($cmd,$fname)=split(/:/,$userinput);
1014: if (-e $fname) {
1015: print $client &unsub($client,$fname,$clientip);
1016: } else {
1017: print $client "not_found\n";
1018: }
1019: # ------------------------------------------------------------------- subscribe
1020: } elsif ($userinput =~ /^sub/) {
1021: print $client &subscribe($userinput,$clientip);
1022: # ------------------------------------------------------------- current version
1023: } elsif ($userinput =~ /^currentversion/) {
1024: my ($cmd,$fname)=split(/:/,$userinput);
1025: print $client ¤tversion($fname)."\n";
1026: # ------------------------------------------------------------------------- log
1027: } elsif ($userinput =~ /^log/) {
1028: my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
1029: chomp($what);
1030: my $proname=propath($udom,$uname);
1031: my $now=time;
1032: {
1033: my $hfh;
1034: if ($hfh=IO::File->new(">>$proname/activity.log")) {
1035: print $hfh "$now:$hostid{$clientip}:$what\n";
1036: print $client "ok\n";
1037: } else {
1038: print $client "error:$!\n";
1039: }
1040: }
1041: # ------------------------------------------------------------------------- put
1042: } elsif ($userinput =~ /^put/) {
1043: my ($cmd,$udom,$uname,$namespace,$what)
1044: =split(/:/,$userinput);
1045: $namespace=~s/\//\_/g;
1046: $namespace=~s/\W//g;
1047: if ($namespace ne 'roles') {
1048: chomp($what);
1049: my $proname=propath($udom,$uname);
1050: my $now=time;
1051: unless ($namespace=~/^nohist\_/) {
1052: my $hfh;
1053: if (
1054: $hfh=IO::File->new(">>$proname/$namespace.hist")
1055: ) { print $hfh "P:$now:$what\n"; }
1056: }
1057: my @pairs=split(/\&/,$what);
1058: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1059: foreach $pair (@pairs) {
1060: ($key,$value)=split(/=/,$pair);
1061: $hash{$key}=$value;
1062: }
1063: if (untie(%hash)) {
1064: print $client "ok\n";
1065: } else {
1066: print $client "error:$!\n";
1067: }
1068: } else {
1069: print $client "error:$!\n";
1070: }
1071: } else {
1072: print $client "refused\n";
1073: }
1074: # -------------------------------------------------------------------- rolesput
1075: } elsif ($userinput =~ /^rolesput/) {
1076: &Debug("rolesput");
1077: if ($wasenc==1) {
1078: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
1079: =split(/:/,$userinput);
1080: &Debug("cmd = ".$cmd." exedom= ".$exedom.
1081: "user = ".$exeuser." udom=".$udom.
1082: "what = ".$what);
1083: my $namespace='roles';
1084: chomp($what);
1085: my $proname=propath($udom,$uname);
1086: my $now=time;
1087: {
1088: my $hfh;
1089: if (
1090: $hfh=IO::File->new(">>$proname/$namespace.hist")
1091: ) {
1092: print $hfh "P:$now:$exedom:$exeuser:$what\n";
1093: }
1094: }
1095: my @pairs=split(/\&/,$what);
1096: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1097: foreach $pair (@pairs) {
1098: ($key,$value)=split(/=/,$pair);
1099: &ManagePermissions($key, $udom, $uname,
1100: &GetAuthType( $udom,
1101: $uname));
1102: $hash{$key}=$value;
1103:
1104: }
1105: if (untie(%hash)) {
1106: print $client "ok\n";
1107: } else {
1108: print $client "error:$!\n";
1109: }
1110: } else {
1111: print $client "error:$!\n";
1112: }
1113: } else {
1114: print $client "refused\n";
1115: }
1116: # ------------------------------------------------------------------------- get
1117: } elsif ($userinput =~ /^get/) {
1118: my ($cmd,$udom,$uname,$namespace,$what)
1119: =split(/:/,$userinput);
1120: $namespace=~s/\//\_/g;
1121: $namespace=~s/\W//g;
1122: chomp($what);
1123: my @queries=split(/\&/,$what);
1124: my $proname=propath($udom,$uname);
1125: my $qresult='';
1126: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1127: for ($i=0;$i<=$#queries;$i++) {
1128: $qresult.="$hash{$queries[$i]}&";
1129: }
1130: if (untie(%hash)) {
1131: $qresult=~s/\&$//;
1132: print $client "$qresult\n";
1133: } else {
1134: print $client "error:$!\n";
1135: }
1136: } else {
1137: print $client "error:$!\n";
1138: }
1139: # ------------------------------------------------------------------------ eget
1140: } elsif ($userinput =~ /^eget/) {
1141: my ($cmd,$udom,$uname,$namespace,$what)
1142: =split(/:/,$userinput);
1143: $namespace=~s/\//\_/g;
1144: $namespace=~s/\W//g;
1145: chomp($what);
1146: my @queries=split(/\&/,$what);
1147: my $proname=propath($udom,$uname);
1148: my $qresult='';
1149: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1150: for ($i=0;$i<=$#queries;$i++) {
1151: $qresult.="$hash{$queries[$i]}&";
1152: }
1153: if (untie(%hash)) {
1154: $qresult=~s/\&$//;
1155: if ($cipher) {
1156: my $cmdlength=length($qresult);
1157: $qresult.=" ";
1158: my $encqresult='';
1159: for
1160: (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
1161: $encqresult.=
1162: unpack("H16",
1163: $cipher->encrypt(substr($qresult,$encidx,8)));
1164: }
1165: print $client "enc:$cmdlength:$encqresult\n";
1166: } else {
1167: print $client "error:no_key\n";
1168: }
1169: } else {
1170: print $client "error:$!\n";
1171: }
1172: } else {
1173: print $client "error:$!\n";
1174: }
1175: # ------------------------------------------------------------------------- del
1176: } elsif ($userinput =~ /^del/) {
1177: my ($cmd,$udom,$uname,$namespace,$what)
1178: =split(/:/,$userinput);
1179: $namespace=~s/\//\_/g;
1180: $namespace=~s/\W//g;
1181: chomp($what);
1182: my $proname=propath($udom,$uname);
1183: my $now=time;
1184: unless ($namespace=~/^nohist\_/) {
1185: my $hfh;
1186: if (
1187: $hfh=IO::File->new(">>$proname/$namespace.hist")
1188: ) { print $hfh "D:$now:$what\n"; }
1189: }
1190: my @keys=split(/\&/,$what);
1191: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1192: foreach $key (@keys) {
1193: delete($hash{$key});
1194: }
1195: if (untie(%hash)) {
1196: print $client "ok\n";
1197: } else {
1198: print $client "error:$!\n";
1199: }
1200: } else {
1201: print $client "error:$!\n";
1202: }
1203: # ------------------------------------------------------------------------ keys
1204: } elsif ($userinput =~ /^keys/) {
1205: my ($cmd,$udom,$uname,$namespace)
1206: =split(/:/,$userinput);
1207: $namespace=~s/\//\_/g;
1208: $namespace=~s/\W//g;
1209: my $proname=propath($udom,$uname);
1210: my $qresult='';
1211: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1212: foreach $key (keys %hash) {
1213: $qresult.="$key&";
1214: }
1215: if (untie(%hash)) {
1216: $qresult=~s/\&$//;
1217: print $client "$qresult\n";
1218: } else {
1219: print $client "error:$!\n";
1220: }
1221: } else {
1222: print $client "error:$!\n";
1223: }
1224: # ----------------------------------------------------------------- dumpcurrent
1225: } elsif ($userinput =~ /^currentdump/) {
1226: my ($cmd,$udom,$uname,$namespace)
1227: =split(/:/,$userinput);
1228: $namespace=~s/\//\_/g;
1229: $namespace=~s/\W//g;
1230: my $qresult='';
1231: my $proname=propath($udom,$uname);
1232: if (tie(%hash,'GDBM_File',
1233: "$proname/$namespace.db",
1234: &GDBM_READER(),0640)) {
1235: # Structure of %data:
1236: # $data{$symb}->{$parameter}=$value;
1237: # $data{$symb}->{'v.'.$parameter}=$version;
1238: # since $parameter will be unescaped, we do not
1239: # have to worry about silly parameter names...
1240: my %data = ();
1241: while (my ($key,$value) = each(%hash)) {
1242: my ($v,$symb,$param) = split(/:/,$key);
1243: next if ($v eq 'version' || $symb eq 'keys');
1244: next if (exists($data{$symb}) &&
1245: exists($data{$symb}->{$param}) &&
1246: $data{$symb}->{'v.'.$param} > $v);
1247: $data{$symb}->{$param}=$value;
1248: $data{$symb}->{'v.'.$param}=$v;
1249: }
1250: if (untie(%hash)) {
1251: while (my ($symb,$param_hash) = each(%data)) {
1252: while(my ($param,$value) = each (%$param_hash)){
1253: next if ($param =~ /^v\./);
1254: $qresult.=$symb.':'.$param.'='.$value.'&';
1255: }
1256: }
1257: chop($qresult);
1258: print $client "$qresult\n";
1259: } else {
1260: print $client "error:$!\n";
1261: }
1262: } else {
1263: print $client "error:$!\n";
1264: }
1265: # ------------------------------------------------------------------------ dump
1266: } elsif ($userinput =~ /^dump/) {
1267: my ($cmd,$udom,$uname,$namespace,$regexp)
1268: =split(/:/,$userinput);
1269: $namespace=~s/\//\_/g;
1270: $namespace=~s/\W//g;
1271: if (defined($regexp)) {
1272: $regexp=&unescape($regexp);
1273: } else {
1274: $regexp='.';
1275: }
1276: my $qresult='';
1277: my $proname=propath($udom,$uname);
1278: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1279: study($regexp);
1280: while (($key,$value) = each(%hash)) {
1281: if ($regexp eq '.') {
1282: $qresult.=$key.'='.$value.'&';
1283: } else {
1284: my $unescapeKey = &unescape($key);
1285: if (eval('$unescapeKey=~/$regexp/')) {
1286: $qresult.="$key=$value&";
1287: }
1288: }
1289: }
1290: if (untie(%hash)) {
1291: chop($qresult);
1292: print $client "$qresult\n";
1293: } else {
1294: print $client "error:$!\n";
1295: }
1296: } else {
1297: print $client "error:$!\n";
1298: }
1299: # ----------------------------------------------------------------------- store
1300: } elsif ($userinput =~ /^store/) {
1301: my ($cmd,$udom,$uname,$namespace,$rid,$what)
1302: =split(/:/,$userinput);
1303: $namespace=~s/\//\_/g;
1304: $namespace=~s/\W//g;
1305: if ($namespace ne 'roles') {
1306: chomp($what);
1307: my $proname=propath($udom,$uname);
1308: my $now=time;
1309: unless ($namespace=~/^nohist\_/) {
1310: my $hfh;
1311: if (
1312: $hfh=IO::File->new(">>$proname/$namespace.hist")
1313: ) { print $hfh "P:$now:$rid:$what\n"; }
1314: }
1315: my @pairs=split(/\&/,$what);
1316:
1317: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1318: my @previouskeys=split(/&/,$hash{"keys:$rid"});
1319: my $key;
1320: $hash{"version:$rid"}++;
1321: my $version=$hash{"version:$rid"};
1322: my $allkeys='';
1323: foreach $pair (@pairs) {
1324: ($key,$value)=split(/=/,$pair);
1325: $allkeys.=$key.':';
1326: $hash{"$version:$rid:$key"}=$value;
1327: }
1328: $hash{"$version:$rid:timestamp"}=$now;
1329: $allkeys.='timestamp';
1330: $hash{"$version:keys:$rid"}=$allkeys;
1331: if (untie(%hash)) {
1332: print $client "ok\n";
1333: } else {
1334: print $client "error:$!\n";
1335: }
1336: } else {
1337: print $client "error:$!\n";
1338: }
1339: } else {
1340: print $client "refused\n";
1341: }
1342: # --------------------------------------------------------------------- restore
1343: } elsif ($userinput =~ /^restore/) {
1344: my ($cmd,$udom,$uname,$namespace,$rid)
1345: =split(/:/,$userinput);
1346: $namespace=~s/\//\_/g;
1347: $namespace=~s/\W//g;
1348: chomp($rid);
1349: my $proname=propath($udom,$uname);
1350: my $qresult='';
1351: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1352: my $version=$hash{"version:$rid"};
1353: $qresult.="version=$version&";
1354: my $scope;
1355: for ($scope=1;$scope<=$version;$scope++) {
1356: my $vkeys=$hash{"$scope:keys:$rid"};
1357: my @keys=split(/:/,$vkeys);
1358: my $key;
1359: $qresult.="$scope:keys=$vkeys&";
1360: foreach $key (@keys) {
1361: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
1362: }
1363: }
1364: if (untie(%hash)) {
1365: $qresult=~s/\&$//;
1366: print $client "$qresult\n";
1367: } else {
1368: print $client "error:$!\n";
1369: }
1370: } else {
1371: print $client "error:$!\n";
1372: }
1373: # -------------------------------------------------------------------- chatsend
1374: } elsif ($userinput =~ /^chatsend/) {
1375: my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
1376: &chatadd($cdom,$cnum,$newpost);
1377: print $client "ok\n";
1378: # -------------------------------------------------------------------- chatretr
1379: } elsif ($userinput =~ /^chatretr/) {
1380: my ($cmd,$cdom,$cnum)=split(/\:/,$userinput);
1381: my $reply='';
1382: foreach (&getchat($cdom,$cnum)) {
1383: $reply.=&escape($_).':';
1384: }
1385: $reply=~s/\:$//;
1386: print $client $reply."\n";
1387: # ------------------------------------------------------------------- querysend
1388: } elsif ($userinput =~ /^querysend/) {
1389: my ($cmd,$query,
1390: $arg1,$arg2,$arg3)=split(/\:/,$userinput);
1391: $query=~s/\n*$//g;
1392: print $client "".
1393: sqlreply("$hostid{$clientip}\&$query".
1394: "\&$arg1"."\&$arg2"."\&$arg3")."\n";
1395: # ------------------------------------------------------------------ queryreply
1396: } elsif ($userinput =~ /^queryreply/) {
1397: my ($cmd,$id,$reply)=split(/:/,$userinput);
1398: my $store;
1399: my $execdir=$perlvar{'lonDaemons'};
1400: if ($store=IO::File->new(">$execdir/tmp/$id")) {
1401: $reply=~s/\&/\n/g;
1402: print $store $reply;
1403: close $store;
1404: my $store2=IO::File->new(">$execdir/tmp/$id.end");
1405: print $store2 "done\n";
1406: close $store2;
1407: print $client "ok\n";
1408: }
1409: else {
1410: print $client "error:$!\n";
1411: }
1412: # ----------------------------------------------------------------------- idput
1413: } elsif ($userinput =~ /^idput/) {
1414: my ($cmd,$udom,$what)=split(/:/,$userinput);
1415: chomp($what);
1416: $udom=~s/\W//g;
1417: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
1418: my $now=time;
1419: {
1420: my $hfh;
1421: if (
1422: $hfh=IO::File->new(">>$proname.hist")
1423: ) { print $hfh "P:$now:$what\n"; }
1424: }
1425: my @pairs=split(/\&/,$what);
1426: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT,0640)) {
1427: foreach $pair (@pairs) {
1428: ($key,$value)=split(/=/,$pair);
1429: $hash{$key}=$value;
1430: }
1431: if (untie(%hash)) {
1432: print $client "ok\n";
1433: } else {
1434: print $client "error:$!\n";
1435: }
1436: } else {
1437: print $client "error:$!\n";
1438: }
1439: # ----------------------------------------------------------------------- idget
1440: } elsif ($userinput =~ /^idget/) {
1441: my ($cmd,$udom,$what)=split(/:/,$userinput);
1442: chomp($what);
1443: $udom=~s/\W//g;
1444: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
1445: my @queries=split(/\&/,$what);
1446: my $qresult='';
1447: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER,0640)) {
1448: for ($i=0;$i<=$#queries;$i++) {
1449: $qresult.="$hash{$queries[$i]}&";
1450: }
1451: if (untie(%hash)) {
1452: $qresult=~s/\&$//;
1453: print $client "$qresult\n";
1454: } else {
1455: print $client "error:$!\n";
1456: }
1457: } else {
1458: print $client "error:$!\n";
1459: }
1460: # ---------------------------------------------------------------------- tmpput
1461: } elsif ($userinput =~ /^tmpput/) {
1462: my ($cmd,$what)=split(/:/,$userinput);
1463: my $store;
1464: $tmpsnum++;
1465: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
1466: $id=~s/\W/\_/g;
1467: $what=~s/\n//g;
1468: my $execdir=$perlvar{'lonDaemons'};
1469: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
1470: print $store $what;
1471: close $store;
1472: print $client "$id\n";
1473: }
1474: else {
1475: print $client "error:$!\n";
1476: }
1477:
1478: # ---------------------------------------------------------------------- tmpget
1479: } elsif ($userinput =~ /^tmpget/) {
1480: my ($cmd,$id)=split(/:/,$userinput);
1481: chomp($id);
1482: $id=~s/\W/\_/g;
1483: my $store;
1484: my $execdir=$perlvar{'lonDaemons'};
1485: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
1486: my $reply=<$store>;
1487: print $client "$reply\n";
1488: close $store;
1489: }
1490: else {
1491: print $client "error:$!\n";
1492: }
1493:
1494: # -------------------------------------------------------------------------- ls
1495: } elsif ($userinput =~ /^ls/) {
1496: my ($cmd,$ulsdir)=split(/:/,$userinput);
1497: my $ulsout='';
1498: my $ulsfn;
1499: if (-e $ulsdir) {
1500: if(-d $ulsdir) {
1501: if (opendir(LSDIR,$ulsdir)) {
1502: while ($ulsfn=readdir(LSDIR)) {
1503: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1504: $ulsout.=$ulsfn.'&'.
1505: join('&',@ulsstats).':';
1506: }
1507: closedir(LSDIR);
1508: }
1509: } else {
1510: my @ulsstats=stat($ulsdir);
1511: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1512: }
1513: } else {
1514: $ulsout='no_such_dir';
1515: }
1516: if ($ulsout eq '') { $ulsout='empty'; }
1517: print $client "$ulsout\n";
1518: # ------------------------------------------------------------------ Hanging up
1519: } elsif (($userinput =~ /^exit/) ||
1520: ($userinput =~ /^init/)) {
1521: &logthis(
1522: "Client $clientip ($hostid{$clientip}) hanging up: $userinput");
1523: print $client "bye\n";
1524: $client->close();
1525: last;
1526: # ------------------------------------------------------------- unknown command
1527: } else {
1528: # unknown command
1529: print $client "unknown_cmd\n";
1530: }
1531: # -------------------------------------------------------------------- complete
1532: alarm(0);
1533: &status('Listening to '.$hostid{$clientip});
1534: }
1535: # --------------------------------------------- client unknown or fishy, refuse
1536: } else {
1537: print $client "refused\n";
1538: $client->close();
1539: &logthis("<font color=blue>WARNING: "
1540: ."Rejected client $clientip, closing connection</font>");
1541: }
1542: }
1543:
1544: # =============================================================================
1545:
1546: &logthis("<font color=red>CRITICAL: "
1547: ."Disconnect from $clientip ($hostid{$clientip})</font>");
1548:
1549:
1550: # this exit is VERY important, otherwise the child will become
1551: # a producer of more and more children, forking yourself into
1552: # process death.
1553: exit;
1554:
1555: }
1556:
1557:
1558: #
1559: # Checks to see if the input roleput request was to set
1560: # an author role. If so, invokes the lchtmldir script to set
1561: # up a correct public_html
1562: # Parameters:
1563: # request - The request sent to the rolesput subchunk.
1564: # We're looking for /domain/_au
1565: # domain - The domain in which the user is having roles doctored.
1566: # user - Name of the user for which the role is being put.
1567: # authtype - The authentication type associated with the user.
1568: #
1569: sub ManagePermissions
1570: {
1571: my $request = shift;
1572: my $domain = shift;
1573: my $user = shift;
1574: my $authtype= shift;
1575:
1576: # See if the request is of the form /$domain/_au
1577:
1578: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
1579: my $execdir = $perlvar{'lonDaemons'};
1580: my $userhome= "/home/$user" ;
1581: Debug("system $execdir/lchtmldir $userhome $system $authtype");
1582: system("$execdir/lchtmldir $userhome $user $authtype");
1583: }
1584: }
1585: #
1586: # GetAuthType - Determines the authorization type of a user in a domain.
1587:
1588: # Returns the authorization type or nouser if there is no such user.
1589: #
1590: sub GetAuthType
1591: {
1592: my $domain = shift;
1593: my $user = shift;
1594:
1595: Debug("GetAuthType( $domain, $user ) \n");
1596: my $proname = &propath($domain, $user);
1597: my $passwdfile = "$proname/passwd";
1598: if( -e $passwdfile ) {
1599: my $pf = IO::File->new($passwdfile);
1600: my $realpassword = <$pf>;
1601: chomp($realpassword);
1602: Debug("Password info = $realpassword\n");
1603: my ($authtype, $contentpwd) = split(/:/, $realpassword);
1604: Debug("Authtype = $authtype, content = $contentpwd\n");
1605: my $availinfo = '';
1606: if($authtype eq 'krb4' or $authtype eq 'krb5') {
1607: $availinfo = $contentpwd;
1608: }
1609:
1610: return "$authtype:$availinfo";
1611: }
1612: else {
1613: Debug("Returning nouser");
1614: return "nouser";
1615: }
1616: }
1617:
1618: sub addline {
1619: my ($fname,$hostid,$ip,$newline)=@_;
1620: my $contents;
1621: my $found=0;
1622: my $expr='^'.$hostid.':'.$ip.':';
1623: $expr =~ s/\./\\\./g;
1624: if ($sh=IO::File->new("$fname.subscription")) {
1625: while (my $subline=<$sh>) {
1626: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
1627: }
1628: $sh->close();
1629: }
1630: $sh=IO::File->new(">$fname.subscription");
1631: if ($contents) { print $sh $contents; }
1632: if ($newline) { print $sh $newline; }
1633: $sh->close();
1634: return $found;
1635: }
1636:
1637: sub getchat {
1638: my ($cdom,$cname)=@_;
1639: my %hash;
1640: my $proname=&propath($cdom,$cname);
1641: my @entries=();
1642: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
1643: &GDBM_READER(),0640)) {
1644: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
1645: untie %hash;
1646: }
1647: return @entries;
1648: }
1649:
1650: sub chatadd {
1651: my ($cdom,$cname,$newchat)=@_;
1652: my %hash;
1653: my $proname=&propath($cdom,$cname);
1654: my @entries=();
1655: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
1656: &GDBM_WRCREAT(),0640)) {
1657: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
1658: my $time=time;
1659: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
1660: my ($thentime,$idnum)=split(/\_/,$lastid);
1661: my $newid=$time.'_000000';
1662: if ($thentime==$time) {
1663: $idnum=~s/^0+//;
1664: $idnum++;
1665: $idnum=substr('000000'.$idnum,-6,6);
1666: $newid=$time.'_'.$idnum;
1667: }
1668: $hash{$newid}=$newchat;
1669: my $expired=$time-3600;
1670: foreach (keys %hash) {
1671: my ($thistime)=($_=~/(\d+)\_/);
1672: if ($thistime<$expired) {
1673: delete $hash{$_};
1674: }
1675: }
1676: untie %hash;
1677: }
1678: }
1679:
1680: sub unsub {
1681: my ($fname,$clientip)=@_;
1682: my $result;
1683: if (unlink("$fname.$hostid{$clientip}")) {
1684: $result="ok\n";
1685: } else {
1686: $result="not_subscribed\n";
1687: }
1688: if (-e "$fname.subscription") {
1689: my $found=&addline($fname,$hostid{$clientip},$clientip,'');
1690: if ($found) { $result="ok\n"; }
1691: } else {
1692: if ($result != "ok\n") { $result="not_subscribed\n"; }
1693: }
1694: return $result;
1695: }
1696:
1697: sub currentversion {
1698: my $fname=shift;
1699: my $version=-1;
1700: my $ulsdir='';
1701: if ($fname=~/^(.+)\/[^\/]+$/) {
1702: $ulsdir=$1;
1703: }
1704: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
1705: $fname=~s/\.(\w+(?:\.meta)*)$/\.\(\\d\+\)\.$1\$/;
1706:
1707: if (-e $fname) { $version=1; }
1708: if (-e $ulsdir) {
1709: if(-d $ulsdir) {
1710: if (opendir(LSDIR,$ulsdir)) {
1711: while ($ulsfn=readdir(LSDIR)) {
1712: # see if this is a regular file (ignore links produced earlier)
1713: my $thisfile=$ulsdir.'/'.$ulsfn;
1714: unless (-l $thisfile) {
1715: if ($thisfile=~/$fname/) {
1716: if ($1>$version) { $version=$1; }
1717: }
1718: }
1719: }
1720: closedir(LSDIR);
1721: $version++;
1722: }
1723: }
1724: }
1725: return $version;
1726: }
1727:
1728: sub thisversion {
1729: my $fname=shift;
1730: my $version=-1;
1731: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
1732: $version=$1;
1733: }
1734: return $version;
1735: }
1736:
1737: sub subscribe {
1738: my ($userinput,$clientip)=@_;
1739: my $result;
1740: my ($cmd,$fname)=split(/:/,$userinput);
1741: my $ownership=&ishome($fname);
1742: if ($ownership eq 'owner') {
1743: # explitly asking for the current version?
1744: unless (-e $fname) {
1745: my $currentversion=¤tversion($fname);
1746: if (&thisversion($fname)==$currentversion) {
1747: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
1748: my $root=$1;
1749: my $extension=$2;
1750: symlink($root.'.'.$extension,
1751: $root.'.'.$currentversion.'.'.$extension);
1752: unless ($extension=~/\.meta$/) {
1753: symlink($root.'.'.$extension.'.meta',
1754: $root.'.'.$currentversion.'.'.$extension.'.meta');
1755: }
1756: }
1757: }
1758: }
1759: if (-e $fname) {
1760: if (-d $fname) {
1761: $result="directory\n";
1762: } else {
1763: if (-e "$fname.$hostid{$clientip}") {&unsub($fname,$clientip);}
1764: $now=time;
1765: my $found=&addline($fname,$hostid{$clientip},$clientip,
1766: "$hostid{$clientip}:$clientip:$now\n");
1767: if ($found) { $result="$fname\n"; }
1768: # if they were subscribed to only meta data, delete that
1769: # subscription, when you subscribe to a file you also get
1770: # the metadata
1771: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
1772: $fname=~s/\/home\/httpd\/html\/res/raw/;
1773: $fname="http://$thisserver/".$fname;
1774: $result="$fname\n";
1775: }
1776: } else {
1777: $result="not_found\n";
1778: }
1779: } else {
1780: $result="rejected\n";
1781: }
1782: return $result;
1783: }
1784:
1785: sub make_passwd_file {
1786: my ($uname, $umode,$npass,$passfilename)=@_;
1787: my $result="ok\n";
1788: if ($umode eq 'krb4' or $umode eq 'krb5') {
1789: {
1790: my $pf = IO::File->new(">$passfilename");
1791: print $pf "$umode:$npass\n";
1792: }
1793: } elsif ($umode eq 'internal') {
1794: my $salt=time;
1795: $salt=substr($salt,6,2);
1796: my $ncpass=crypt($npass,$salt);
1797: {
1798: &Debug("Creating internal auth");
1799: my $pf = IO::File->new(">$passfilename");
1800: print $pf "internal:$ncpass\n";
1801: }
1802: } elsif ($umode eq 'localauth') {
1803: {
1804: my $pf = IO::File->new(">$passfilename");
1805: print $pf "localauth:$npass\n";
1806: }
1807: } elsif ($umode eq 'unix') {
1808: {
1809: my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
1810: {
1811: &Debug("Executing external: ".$execpath);
1812: &Debug("user = ".$uname.", Password =". $npass);
1813: my $se = IO::File->new("|$execpath > /home/www/lcuseradd.log");
1814: print $se "$uname\n";
1815: print $se "$npass\n";
1816: print $se "$npass\n";
1817: }
1818: my $useraddok = $?;
1819: if($useraddok > 0) {
1820: &logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));
1821: }
1822: my $pf = IO::File->new(">$passfilename");
1823: print $pf "unix:\n";
1824: }
1825: } elsif ($umode eq 'none') {
1826: {
1827: my $pf = IO::File->new(">$passfilename");
1828: print $pf "none:\n";
1829: }
1830: } else {
1831: $result="auth_mode_error\n";
1832: }
1833: return $result;
1834: }
1835:
1836: # ----------------------------------- POD (plain old documentation, CPAN style)
1837:
1838: =head1 NAME
1839:
1840: lond - "LON Daemon" Server (port "LOND" 5663)
1841:
1842: =head1 SYNOPSIS
1843:
1844: Usage: B<lond>
1845:
1846: Should only be run as user=www. This is a command-line script which
1847: is invoked by B<loncron>. There is no expectation that a typical user
1848: will manually start B<lond> from the command-line. (In other words,
1849: DO NOT START B<lond> YOURSELF.)
1850:
1851: =head1 DESCRIPTION
1852:
1853: There are two characteristics associated with the running of B<lond>,
1854: PROCESS MANAGEMENT (starting, stopping, handling child processes)
1855: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
1856: subscriptions, etc). These are described in two large
1857: sections below.
1858:
1859: B<PROCESS MANAGEMENT>
1860:
1861: Preforker - server who forks first. Runs as a daemon. HUPs.
1862: Uses IDEA encryption
1863:
1864: B<lond> forks off children processes that correspond to the other servers
1865: in the network. Management of these processes can be done at the
1866: parent process level or the child process level.
1867:
1868: B<logs/lond.log> is the location of log messages.
1869:
1870: The process management is now explained in terms of linux shell commands,
1871: subroutines internal to this code, and signal assignments:
1872:
1873: =over 4
1874:
1875: =item *
1876:
1877: PID is stored in B<logs/lond.pid>
1878:
1879: This is the process id number of the parent B<lond> process.
1880:
1881: =item *
1882:
1883: SIGTERM and SIGINT
1884:
1885: Parent signal assignment:
1886: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
1887:
1888: Child signal assignment:
1889: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
1890: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
1891: to restart a new child.)
1892:
1893: Command-line invocations:
1894: B<kill> B<-s> SIGTERM I<PID>
1895: B<kill> B<-s> SIGINT I<PID>
1896:
1897: Subroutine B<HUNTSMAN>:
1898: This is only invoked for the B<lond> parent I<PID>.
1899: This kills all the children, and then the parent.
1900: The B<lonc.pid> file is cleared.
1901:
1902: =item *
1903:
1904: SIGHUP
1905:
1906: Current bug:
1907: This signal can only be processed the first time
1908: on the parent process. Subsequent SIGHUP signals
1909: have no effect.
1910:
1911: Parent signal assignment:
1912: $SIG{HUP} = \&HUPSMAN;
1913:
1914: Child signal assignment:
1915: none (nothing happens)
1916:
1917: Command-line invocations:
1918: B<kill> B<-s> SIGHUP I<PID>
1919:
1920: Subroutine B<HUPSMAN>:
1921: This is only invoked for the B<lond> parent I<PID>,
1922: This kills all the children, and then the parent.
1923: The B<lond.pid> file is cleared.
1924:
1925: =item *
1926:
1927: SIGUSR1
1928:
1929: Parent signal assignment:
1930: $SIG{USR1} = \&USRMAN;
1931:
1932: Child signal assignment:
1933: $SIG{USR1}= \&logstatus;
1934:
1935: Command-line invocations:
1936: B<kill> B<-s> SIGUSR1 I<PID>
1937:
1938: Subroutine B<USRMAN>:
1939: When invoked for the B<lond> parent I<PID>,
1940: SIGUSR1 is sent to all the children, and the status of
1941: each connection is logged.
1942:
1943: =item *
1944:
1945: SIGCHLD
1946:
1947: Parent signal assignment:
1948: $SIG{CHLD} = \&REAPER;
1949:
1950: Child signal assignment:
1951: none
1952:
1953: Command-line invocations:
1954: B<kill> B<-s> SIGCHLD I<PID>
1955:
1956: Subroutine B<REAPER>:
1957: This is only invoked for the B<lond> parent I<PID>.
1958: Information pertaining to the child is removed.
1959: The socket port is cleaned up.
1960:
1961: =back
1962:
1963: B<SERVER-SIDE ACTIVITIES>
1964:
1965: Server-side information can be accepted in an encrypted or non-encrypted
1966: method.
1967:
1968: =over 4
1969:
1970: =item ping
1971:
1972: Query a client in the hosts.tab table; "Are you there?"
1973:
1974: =item pong
1975:
1976: Respond to a ping query.
1977:
1978: =item ekey
1979:
1980: Read in encrypted key, make cipher. Respond with a buildkey.
1981:
1982: =item load
1983:
1984: Respond with CPU load based on a computation upon /proc/loadavg.
1985:
1986: =item currentauth
1987:
1988: Reply with current authentication information (only over an
1989: encrypted channel).
1990:
1991: =item auth
1992:
1993: Only over an encrypted channel, reply as to whether a user's
1994: authentication information can be validated.
1995:
1996: =item passwd
1997:
1998: Allow for a password to be set.
1999:
2000: =item makeuser
2001:
2002: Make a user.
2003:
2004: =item passwd
2005:
2006: Allow for authentication mechanism and password to be changed.
2007:
2008: =item home
2009:
2010: Respond to a question "are you the home for a given user?"
2011:
2012: =item update
2013:
2014: Update contents of a subscribed resource.
2015:
2016: =item unsubscribe
2017:
2018: The server is unsubscribing from a resource.
2019:
2020: =item subscribe
2021:
2022: The server is subscribing to a resource.
2023:
2024: =item log
2025:
2026: Place in B<logs/lond.log>
2027:
2028: =item put
2029:
2030: stores hash in namespace
2031:
2032: =item rolesput
2033:
2034: put a role into a user's environment
2035:
2036: =item get
2037:
2038: returns hash with keys from array
2039: reference filled in from namespace
2040:
2041: =item eget
2042:
2043: returns hash with keys from array
2044: reference filled in from namesp (encrypts the return communication)
2045:
2046: =item rolesget
2047:
2048: get a role from a user's environment
2049:
2050: =item del
2051:
2052: deletes keys out of array from namespace
2053:
2054: =item keys
2055:
2056: returns namespace keys
2057:
2058: =item dump
2059:
2060: dumps the complete (or key matching regexp) namespace into a hash
2061:
2062: =item store
2063:
2064: stores hash permanently
2065: for this url; hashref needs to be given and should be a \%hashname; the
2066: remaining args aren't required and if they aren't passed or are '' they will
2067: be derived from the ENV
2068:
2069: =item restore
2070:
2071: returns a hash for a given url
2072:
2073: =item querysend
2074:
2075: Tells client about the lonsql process that has been launched in response
2076: to a sent query.
2077:
2078: =item queryreply
2079:
2080: Accept information from lonsql and make appropriate storage in temporary
2081: file space.
2082:
2083: =item idput
2084:
2085: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
2086: for each student, defined perhaps by the institutional Registrar.)
2087:
2088: =item idget
2089:
2090: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
2091: for each student, defined perhaps by the institutional Registrar.)
2092:
2093: =item tmpput
2094:
2095: Accept and store information in temporary space.
2096:
2097: =item tmpget
2098:
2099: Send along temporarily stored information.
2100:
2101: =item ls
2102:
2103: List part of a user's directory.
2104:
2105: =item Hanging up (exit or init)
2106:
2107: What to do when a client tells the server that they (the client)
2108: are leaving the network.
2109:
2110: =item unknown command
2111:
2112: If B<lond> is sent an unknown command (not in the list above),
2113: it replys to the client "unknown_cmd".
2114:
2115: =item UNKNOWN CLIENT
2116:
2117: If the anti-spoofing algorithm cannot verify the client,
2118: the client is rejected (with a "refused" message sent
2119: to the client, and the connection is closed.
2120:
2121: =back
2122:
2123: =head1 PREREQUISITES
2124:
2125: IO::Socket
2126: IO::File
2127: Apache::File
2128: Symbol
2129: POSIX
2130: Crypt::IDEA
2131: LWP::UserAgent()
2132: GDBM_File
2133: Authen::Krb4
2134: Authen::Krb5
2135:
2136: =head1 COREQUISITES
2137:
2138: =head1 OSNAMES
2139:
2140: linux
2141:
2142: =head1 SCRIPT CATEGORIES
2143:
2144: Server/Process
2145:
2146: =cut
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