1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: # 5/26/99,6/4,6/10,6/11,6/14,6/15,6/26,6/28,6/30,
5: # 7/8,7/9,7/10,7/12,7/17,7/19,9/21,
6: # 10/7,10/8,10/9,10/11,10/13,10/15,11/4,11/16,
7: # 12/7,12/15,01/06,01/11,01/12,01/14,2/8,
8: # 03/07,05/31 Gerd Kortemeyer
9: # 06/26 Scott Harrison
10: # 06/29,06/30,07/14,07/15,07/17,07/20,07/25,09/18 Gerd Kortemeyer
11: # 12/05 Scott Harrison
12: # 12/05,12/13,12/29 Gerd Kortemeyer
13: # Jan 01 Scott Harrison
14: # 02/12 Gerd Kortemeyer
15: # 03/15 Scott Harrison
16: # 03/24 Gerd Kortemeyer
17: # 04/02 Scott Harrison
18: # 05/11,05/28,08/30 Gerd Kortemeyer
19: # 9/30,10/22,11/13,11/15,11/16 Scott Harrison
20: # 11/26 Gerd Kortemeyer
21: #
22: # $Id: lond,v 1.57 2001/11/26 20:31:01 www Exp $
23: ###
24:
25: # based on "Perl Cookbook" ISBN 1-56592-243-3
26: # preforker - server who forks first
27: # runs as a daemon
28: # HUPs
29: # uses IDEA encryption
30:
31: use IO::Socket;
32: use IO::File;
33: use Apache::File;
34: use Symbol;
35: use POSIX;
36: use Crypt::IDEA;
37: use LWP::UserAgent();
38: use GDBM_File;
39: use Authen::Krb4;
40: use lib '/home/httpd/lib/perl/';
41: use localauth;
42:
43: my $status='';
44: my $lastlog='';
45:
46: # grabs exception and records it to log before exiting
47: sub catchexception {
48: my ($error)=@_;
49: $SIG{'QUIT'}='DEFAULT';
50: $SIG{__DIE__}='DEFAULT';
51: &logthis("<font color=red>CRITICAL: "
52: ."ABNORMAL EXIT. Child $$ for server $wasserver died through "
53: ."a crash with this error msg->[$error]</font>");
54: &logthis('Famous last words: '.$status.' - '.$lastlog);
55: if ($client) { print $client "error: $error\n"; }
56: die($error);
57: }
58:
59: # -------------------------------- Set signal handlers to record abnormal exits
60:
61: $SIG{'QUIT'}=\&catchexception;
62: $SIG{__DIE__}=\&catchexception;
63:
64: # ------------------------------------ Read httpd access.conf and get variables
65:
66: open (CONFIG,"/etc/httpd/conf/access.conf") || die "Can't read access.conf";
67:
68: while ($configline=<CONFIG>) {
69: if ($configline =~ /PerlSetVar/) {
70: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
71: chomp($varvalue);
72: $perlvar{$varname}=$varvalue;
73: }
74: }
75: close(CONFIG);
76:
77: # ----------------------------- Make sure this process is running from user=www
78: my $wwwid=getpwnam('www');
79: if ($wwwid!=$<) {
80: $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
81: $subj="LON: $perlvar{'lonHostID'} User ID mismatch";
82: system("echo 'User ID mismatch. lond must be run as user www.' |\
83: mailto $emailto -s '$subj' > /dev/null");
84: exit 1;
85: }
86:
87: # --------------------------------------------- Check if other instance running
88:
89: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
90:
91: if (-e $pidfile) {
92: my $lfh=IO::File->new("$pidfile");
93: my $pide=<$lfh>;
94: chomp($pide);
95: if (kill 0 => $pide) { die "already running"; }
96: }
97:
98: $PREFORK=4; # number of children to maintain, at least four spare
99:
100: # ------------------------------------------------------------- Read hosts file
101:
102: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
103:
104: while ($configline=<CONFIG>) {
105: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
106: chomp($ip);
107: $hostid{$ip}=$id;
108: if ($id eq $perlvar{'lonHostID'}) { $thisserver=$name; }
109: $PREFORK++;
110: }
111: close(CONFIG);
112:
113: # establish SERVER socket, bind and listen.
114: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
115: Type => SOCK_STREAM,
116: Proto => 'tcp',
117: Reuse => 1,
118: Listen => 10 )
119: or die "making socket: $@\n";
120:
121: # --------------------------------------------------------- Do global variables
122:
123: # global variables
124:
125: $MAX_CLIENTS_PER_CHILD = 5; # number of clients each child should
126: # process
127: %children = (); # keys are current child process IDs
128: $children = 0; # current number of children
129:
130: sub REAPER { # takes care of dead children
131: $SIG{CHLD} = \&REAPER;
132: my $pid = wait;
133: $children --;
134: &logthis("Child $pid died");
135: delete $children{$pid};
136: }
137:
138: sub HUNTSMAN { # signal handler for SIGINT
139: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
140: kill 'INT' => keys %children;
141: my $execdir=$perlvar{'lonDaemons'};
142: unlink("$execdir/logs/lond.pid");
143: &logthis("<font color=red>CRITICAL: Shutting down</font>");
144: exit; # clean up with dignity
145: }
146:
147: sub HUPSMAN { # signal handler for SIGHUP
148: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
149: kill 'INT' => keys %children;
150: close($server); # free up socket
151: &logthis("<font color=red>CRITICAL: Restarting</font>");
152: unlink("$execdir/logs/lond.pid");
153: my $execdir=$perlvar{'lonDaemons'};
154: exec("$execdir/lond"); # here we go again
155: }
156:
157: sub checkchildren {
158: &initnewstatus();
159: &logstatus();
160: &logthis('Going to check on the children');
161: map {
162: sleep 1;
163: unless (kill 'USR1' => $_) {
164: &logthis ('Child '.$_.' is dead');
165: &logstatus($$.' is dead');
166: }
167: } sort keys %children;
168: }
169:
170: # --------------------------------------------------------------------- Logging
171:
172: sub logthis {
173: my $message=shift;
174: my $execdir=$perlvar{'lonDaemons'};
175: my $fh=IO::File->new(">>$execdir/logs/lond.log");
176: my $now=time;
177: my $local=localtime($now);
178: print $fh "$local ($$): $message\n";
179: }
180:
181: # ------------------------------------------------------------------ Log status
182:
183: sub logstatus {
184: my $docdir=$perlvar{'lonDocRoot'};
185: my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");
186: print $fh $$."\t".$status."\t".$lastlog."\n";
187: }
188:
189: sub initnewstatus {
190: my $docdir=$perlvar{'lonDocRoot'};
191: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
192: my $now=time;
193: my $local=localtime($now);
194: print $fh "LOND status $local - parent $$\n\n";
195: }
196:
197: # -------------------------------------------------------------- Status setting
198:
199: sub status {
200: my $what=shift;
201: my $now=time;
202: my $local=localtime($now);
203: $status=$local.': '.$what;
204: }
205:
206: # -------------------------------------------------------- Escape Special Chars
207:
208: sub escape {
209: my $str=shift;
210: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
211: return $str;
212: }
213:
214: # ----------------------------------------------------- Un-Escape Special Chars
215:
216: sub unescape {
217: my $str=shift;
218: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
219: return $str;
220: }
221:
222: # ----------------------------------------------------------- Send USR1 to lonc
223:
224: sub reconlonc {
225: my $peerfile=shift;
226: &logthis("Trying to reconnect for $peerfile");
227: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
228: if (my $fh=IO::File->new("$loncfile")) {
229: my $loncpid=<$fh>;
230: chomp($loncpid);
231: if (kill 0 => $loncpid) {
232: &logthis("lonc at pid $loncpid responding, sending USR1");
233: kill USR1 => $loncpid;
234: sleep 1;
235: if (-e "$peerfile") { return; }
236: &logthis("$peerfile still not there, give it another try");
237: sleep 5;
238: if (-e "$peerfile") { return; }
239: &logthis(
240: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
241: } else {
242: &logthis(
243: "<font color=red>CRITICAL: "
244: ."lonc at pid $loncpid not responding, giving up</font>");
245: }
246: } else {
247: &logthis('<font color=red>CRITICAL: lonc not running, giving up</font>');
248: }
249: }
250:
251: # -------------------------------------------------- Non-critical communication
252:
253: sub subreply {
254: my ($cmd,$server)=@_;
255: my $peerfile="$perlvar{'lonSockDir'}/$server";
256: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
257: Type => SOCK_STREAM,
258: Timeout => 10)
259: or return "con_lost";
260: print $sclient "$cmd\n";
261: my $answer=<$sclient>;
262: chomp($answer);
263: if (!$answer) { $answer="con_lost"; }
264: return $answer;
265: }
266:
267: sub reply {
268: my ($cmd,$server)=@_;
269: my $answer;
270: if ($server ne $perlvar{'lonHostID'}) {
271: $answer=subreply($cmd,$server);
272: if ($answer eq 'con_lost') {
273: $answer=subreply("ping",$server);
274: if ($answer ne $server) {
275: &reconlonc("$perlvar{'lonSockDir'}/$server");
276: }
277: $answer=subreply($cmd,$server);
278: }
279: } else {
280: $answer='self_reply';
281: }
282: return $answer;
283: }
284:
285: # -------------------------------------------------------------- Talk to lonsql
286:
287: sub sqlreply {
288: my ($cmd)=@_;
289: my $answer=subsqlreply($cmd);
290: if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }
291: return $answer;
292: }
293:
294: sub subsqlreply {
295: my ($cmd)=@_;
296: my $unixsock="mysqlsock";
297: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
298: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
299: Type => SOCK_STREAM,
300: Timeout => 10)
301: or return "con_lost";
302: print $sclient "$cmd\n";
303: my $answer=<$sclient>;
304: chomp($answer);
305: if (!$answer) { $answer="con_lost"; }
306: return $answer;
307: }
308:
309: # -------------------------------------------- Return path to profile directory
310:
311: sub propath {
312: my ($udom,$uname)=@_;
313: $udom=~s/\W//g;
314: $uname=~s/\W//g;
315: my $subdir=$uname.'__';
316: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
317: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
318: return $proname;
319: }
320:
321: # --------------------------------------- Is this the home server of an author?
322:
323: sub ishome {
324: my $author=shift;
325: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
326: my ($udom,$uname)=split(/\//,$author);
327: my $proname=propath($udom,$uname);
328: if (-e $proname) {
329: return 'owner';
330: } else {
331: return 'not_owner';
332: }
333: }
334:
335: # ======================================================= Continue main program
336: # ---------------------------------------------------- Fork once and dissociate
337:
338: $fpid=fork;
339: exit if $fpid;
340: die "Couldn't fork: $!" unless defined ($fpid);
341:
342: POSIX::setsid() or die "Can't start new session: $!";
343:
344: # ------------------------------------------------------- Write our PID on disk
345:
346: $execdir=$perlvar{'lonDaemons'};
347: open (PIDSAVE,">$execdir/logs/lond.pid");
348: print PIDSAVE "$$\n";
349: close(PIDSAVE);
350: &logthis("<font color=red>CRITICAL: ---------- Starting ----------</font>");
351: &status('Starting');
352:
353: # ------------------------------------------------------- Now we are on our own
354:
355: # Fork off our children.
356: for (1 .. $PREFORK) {
357: make_new_child();
358: }
359:
360: # ----------------------------------------------------- Install signal handlers
361:
362: &status('Forked children');
363:
364: $SIG{CHLD} = \&REAPER;
365: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
366: $SIG{HUP} = \&HUPSMAN;
367: $SIG{USR1} = \&checkchildren;
368:
369: # And maintain the population.
370: while (1) {
371: &status('Sleeping');
372: sleep; # wait for a signal (i.e., child's death)
373: &logthis('Woke up');
374: &status('Woke up');
375: for ($i = $children; $i < $PREFORK; $i++) {
376: make_new_child(); # top up the child pool
377: }
378: }
379:
380: sub make_new_child {
381: my $pid;
382: my $cipher;
383: my $sigset;
384: &logthis("Attempting to start child");
385: # block signal for fork
386: $sigset = POSIX::SigSet->new(SIGINT);
387: sigprocmask(SIG_BLOCK, $sigset)
388: or die "Can't block SIGINT for fork: $!\n";
389:
390: die "fork: $!" unless defined ($pid = fork);
391:
392: if ($pid) {
393: # Parent records the child's birth and returns.
394: sigprocmask(SIG_UNBLOCK, $sigset)
395: or die "Can't unblock SIGINT for fork: $!\n";
396: $children{$pid} = 1;
397: $children++;
398: &status('Started child '.$pid);
399: return;
400: } else {
401: # Child can *not* return from this subroutine.
402: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
403: $SIG{USR1}= \&logstatus;
404: $lastlog='Forked ';
405: $status='Forked';
406:
407: # unblock signals
408: sigprocmask(SIG_UNBLOCK, $sigset)
409: or die "Can't unblock SIGINT for fork: $!\n";
410:
411: $tmpsnum=0;
412:
413: # handle connections until we've reached $MAX_CLIENTS_PER_CHILD
414: for ($i=0; $i < $MAX_CLIENTS_PER_CHILD; $i++) {
415: &status('Idle, waiting for connection');
416: $client = $server->accept() or last;
417: &status('Accepted connection');
418: # =============================================================================
419: # do something with the connection
420: # -----------------------------------------------------------------------------
421: # see if we know client and check for spoof IP by challenge
422: my $caller=getpeername($client);
423: my ($port,$iaddr)=unpack_sockaddr_in($caller);
424: my $clientip=inet_ntoa($iaddr);
425: my $clientrec=($hostid{$clientip} ne undef);
426: &logthis(
427: "<font color=yellow>INFO: Connection $i, $clientip ($hostid{$clientip})</font>"
428: );
429: &status("Connecting $clientip ($hostid{$clientip})");
430: my $clientok;
431: if ($clientrec) {
432: &status("Waiting for init from $clientip ($hostid{$clientip})");
433: my $remotereq=<$client>;
434: $remotereq=~s/\W//g;
435: if ($remotereq eq 'init') {
436: my $challenge="$$".time;
437: print $client "$challenge\n";
438: &status(
439: "Waiting for challenge reply from $clientip ($hostid{$clientip})");
440: $remotereq=<$client>;
441: $remotereq=~s/\W//g;
442: if ($challenge eq $remotereq) {
443: $clientok=1;
444: print $client "ok\n";
445: } else {
446: &logthis(
447: "<font color=blue>WARNING: $clientip did not reply challenge</font>");
448: print $client "bye\n";
449: &status('No challenge reply '.$clientip);
450: }
451: } else {
452: &logthis(
453: "<font color=blue>WARNING: "
454: ."$clientip failed to initialize: >$remotereq< </font>");
455: print $client "bye\n";
456: &status('No init '.$clientip);
457: }
458: } else {
459: &logthis(
460: "<font color=blue>WARNING: Unknown client $clientip</font>");
461: print $client "bye\n";
462: &status('Hung up on '.$clientip);
463: }
464: if ($clientok) {
465: # ---------------- New known client connecting, could mean machine online again
466: &reconlonc("$perlvar{'lonSockDir'}/$hostid{$clientip}");
467: &logthis(
468: "<font color=green>Established connection: $hostid{$clientip}</font>");
469: &status('Listening to '.$hostid{$clientip});
470: # ------------------------------------------------------------ Process requests
471: while (my $userinput=<$client>) {
472: chomp($userinput);
473: &status('Processing '.$hostid{$clientip}.': '.$userinput);
474: my $wasenc=0;
475: # ------------------------------------------------------------ See if encrypted
476: if ($userinput =~ /^enc/) {
477: if ($cipher) {
478: my ($cmd,$cmdlength,$encinput)=split(/:/,$userinput);
479: $userinput='';
480: for (my $encidx=0;$encidx<length($encinput);$encidx+=16) {
481: $userinput.=
482: $cipher->decrypt(
483: pack("H16",substr($encinput,$encidx,16))
484: );
485: }
486: $userinput=substr($userinput,0,$cmdlength);
487: $wasenc=1;
488: }
489: }
490: # ------------------------------------------------------------- Normal commands
491: # ------------------------------------------------------------------------ ping
492: if ($userinput =~ /^ping/) {
493: print $client "$perlvar{'lonHostID'}\n";
494: # ------------------------------------------------------------------------ pong
495: } elsif ($userinput =~ /^pong/) {
496: $reply=reply("ping",$hostid{$clientip});
497: print $client "$perlvar{'lonHostID'}:$reply\n";
498: # ------------------------------------------------------------------------ ekey
499: } elsif ($userinput =~ /^ekey/) {
500: my $buildkey=time.$$.int(rand 100000);
501: $buildkey=~tr/1-6/A-F/;
502: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
503: my $key=$perlvar{'lonHostID'}.$hostid{$clientip};
504: $key=~tr/a-z/A-Z/;
505: $key=~tr/G-P/0-9/;
506: $key=~tr/Q-Z/0-9/;
507: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
508: $key=substr($key,0,32);
509: my $cipherkey=pack("H32",$key);
510: $cipher=new IDEA $cipherkey;
511: print $client "$buildkey\n";
512: # ------------------------------------------------------------------------ load
513: } elsif ($userinput =~ /^load/) {
514: my $loadavg;
515: {
516: my $loadfile=IO::File->new('/proc/loadavg');
517: $loadavg=<$loadfile>;
518: }
519: $loadavg =~ s/\s.*//g;
520: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
521: print $client "$loadpercent\n";
522: # ----------------------------------------------------------------- currentauth
523: } elsif ($userinput =~ /^currentauth/) {
524: if ($wasenc==1) {
525: my ($cmd,$udom,$uname)=split(/:/,$userinput);
526: my $proname=propath($udom,$uname);
527: my $passfilename="$proname/passwd";
528: if (-e $passfilename) {
529: my $pf = IO::File->new($passfilename);
530: my $realpasswd=<$pf>;
531: chomp($realpasswd);
532: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
533: my $availablecontent='';
534: if ($howpwd eq 'krb4') {
535: $availablecontent=$contentpwd;
536: }
537: print $client "$howpwd:$availablecontent\n";
538: } else {
539: print $client "unknown_user\n";
540: }
541: } else {
542: print $client "refused\n";
543: }
544: # ------------------------------------------------------------------------ auth
545: } elsif ($userinput =~ /^auth/) {
546: if ($wasenc==1) {
547: my ($cmd,$udom,$uname,$upass)=split(/:/,$userinput);
548: chomp($upass);
549: $upass=unescape($upass);
550: my $proname=propath($udom,$uname);
551: my $passfilename="$proname/passwd";
552: if (-e $passfilename) {
553: my $pf = IO::File->new($passfilename);
554: my $realpasswd=<$pf>;
555: chomp($realpasswd);
556: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
557: my $pwdcorrect=0;
558: if ($howpwd eq 'internal') {
559: $pwdcorrect=
560: (crypt($upass,$contentpwd) eq $contentpwd);
561: } elsif ($howpwd eq 'unix') {
562: $contentpwd=(getpwnam($uname))[1];
563: my $pwauth_path="/usr/local/sbin/pwauth";
564: unless ($contentpwd eq 'x') {
565: $pwdcorrect=
566: (crypt($upass,$contentpwd) eq $contentpwd);
567: }
568: elsif (-e $pwauth_path) {
569: open PWAUTH, "|$pwauth_path" or
570: die "Cannot invoke authentication";
571: print PWAUTH "$uname\n$upass\n";
572: close PWAUTH;
573: $pwdcorrect=!$?;
574: }
575: } elsif ($howpwd eq 'krb4') {
576: $pwdcorrect=(
577: Authen::Krb4::get_pw_in_tkt($uname,"",
578: $contentpwd,'krbtgt',$contentpwd,1,
579: $upass) == 0);
580: } elsif ($howpwd eq 'localauth') {
581: $pwdcorrect=&localauth::localauth($uname,$upass,
582: $contentpwd);
583: }
584: if ($pwdcorrect) {
585: print $client "authorized\n";
586: } else {
587: print $client "non_authorized\n";
588: }
589: } else {
590: print $client "unknown_user\n";
591: }
592: } else {
593: print $client "refused\n";
594: }
595: # ---------------------------------------------------------------------- passwd
596: } elsif ($userinput =~ /^passwd/) {
597: if ($wasenc==1) {
598: my
599: ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
600: chomp($npass);
601: $upass=&unescape($upass);
602: $npass=&unescape($npass);
603: my $proname=propath($udom,$uname);
604: my $passfilename="$proname/passwd";
605: if (-e $passfilename) {
606: my $realpasswd;
607: { my $pf = IO::File->new($passfilename);
608: $realpasswd=<$pf>; }
609: chomp($realpasswd);
610: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
611: if ($howpwd eq 'internal') {
612: if (crypt($upass,$contentpwd) eq $contentpwd) {
613: my $salt=time;
614: $salt=substr($salt,6,2);
615: my $ncpass=crypt($npass,$salt);
616: { my $pf = IO::File->new(">$passfilename");
617: print $pf "internal:$ncpass\n"; }
618: print $client "ok\n";
619: } else {
620: print $client "non_authorized\n";
621: }
622: } else {
623: print $client "auth_mode_error\n";
624: }
625: } else {
626: print $client "unknown_user\n";
627: }
628: } else {
629: print $client "refused\n";
630: }
631: # -------------------------------------------------------------------- makeuser
632: } elsif ($userinput =~ /^makeuser/) {
633: my $oldumask=umask(0077);
634: if ($wasenc==1) {
635: my
636: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
637: chomp($npass);
638: $npass=&unescape($npass);
639: my $proname=propath($udom,$uname);
640: my $passfilename="$proname/passwd";
641: if (-e $passfilename) {
642: print $client "already_exists\n";
643: } elsif ($udom ne $perlvar{'lonDefDomain'}) {
644: print $client "not_right_domain\n";
645: } else {
646: @fpparts=split(/\//,$proname);
647: $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
648: $fperror='';
649: for ($i=3;$i<=$#fpparts;$i++) {
650: $fpnow.='/'.$fpparts[$i];
651: unless (-e $fpnow) {
652: unless (mkdir($fpnow,0777)) {
653: $fperror="error:$!\n";
654: }
655: }
656: }
657: unless ($fperror) {
658: if ($umode eq 'krb4') {
659: {
660: my $pf = IO::File->new(">$passfilename");
661: print $pf "krb4:$npass\n";
662: }
663: print $client "ok\n";
664: } elsif ($umode eq 'internal') {
665: my $salt=time;
666: $salt=substr($salt,6,2);
667: my $ncpass=crypt($npass,$salt);
668: {
669: my $pf = IO::File->new(">$passfilename");
670: print $pf "internal:$ncpass\n";
671: }
672: print $client "ok\n";
673: } elsif ($umode eq 'localauth') {
674: {
675: my $pf = IO::File->new(">$passfilename");
676: print $pf "localauth:$npass\n";
677: }
678: print $client "ok\n";
679: } elsif ($umode eq 'unix') {
680: {
681: my $execpath="$perlvar{'lonDaemons'}/".
682: "lcuseradd";
683: {
684: my $se = IO::File->new("|$execpath");
685: print $se "$uname\n";
686: print $se "$npass\n";
687: print $se "$npass\n";
688: }
689: my $pf = IO::File->new(">$passfilename");
690: print $pf "unix:\n";
691: }
692: print $client "ok\n";
693: } elsif ($umode eq 'none') {
694: {
695: my $pf = IO::File->new(">$passfilename");
696: print $pf "none:\n";
697: }
698: print $client "ok\n";
699: } else {
700: print $client "auth_mode_error\n";
701: }
702: } else {
703: print $client "$fperror\n";
704: }
705: }
706: } else {
707: print $client "refused\n";
708: }
709: umask($oldumask);
710: # -------------------------------------------------------------- changeuserauth
711: } elsif ($userinput =~ /^changeuserauth/) {
712: if ($wasenc==1) {
713: my
714: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
715: chomp($npass);
716: $npass=&unescape($npass);
717: my $proname=propath($udom,$uname);
718: my $passfilename="$proname/passwd";
719: if ($udom ne $perlvar{'lonDefDomain'}) {
720: print $client "not_right_domain\n";
721: } else {
722: if ($umode eq 'krb4') {
723: {
724: my $pf = IO::File->new(">$passfilename");
725: print $pf "krb4:$npass\n";
726: }
727: print $client "ok\n";
728: } elsif ($umode eq 'internal') {
729: my $salt=time;
730: $salt=substr($salt,6,2);
731: my $ncpass=crypt($npass,$salt);
732: {
733: my $pf = IO::File->new(">$passfilename");
734: print $pf "internal:$ncpass\n";
735: }
736: print $client "ok\n";
737: } elsif ($umode eq 'localauth') {
738: {
739: my $pf = IO::File->new(">$passfilename");
740: print $pf "localauth:$npass\n";
741: }
742: print $client "ok\n";
743: } elsif ($umode eq 'unix') {
744: {
745: my $execpath="$perlvar{'lonDaemons'}/".
746: "lcuseradd";
747: {
748: my $se = IO::File->new("|$execpath");
749: print $se "$uname\n";
750: print $se "$npass\n";
751: print $se "$npass\n";
752: }
753: my $pf = IO::File->new(">$passfilename");
754: print $pf "unix:\n";
755: }
756: print $client "ok\n";
757: } elsif ($umode eq 'none') {
758: {
759: my $pf = IO::File->new(">$passfilename");
760: print $pf "none:\n";
761: }
762: print $client "ok\n";
763: } else {
764: print $client "auth_mode_error\n";
765: }
766: }
767: } else {
768: print $client "refused\n";
769: }
770: # ------------------------------------------------------------------------ home
771: } elsif ($userinput =~ /^home/) {
772: my ($cmd,$udom,$uname)=split(/:/,$userinput);
773: chomp($uname);
774: my $proname=propath($udom,$uname);
775: if (-e $proname) {
776: print $client "found\n";
777: } else {
778: print $client "not_found\n";
779: }
780: # ---------------------------------------------------------------------- update
781: } elsif ($userinput =~ /^update/) {
782: my ($cmd,$fname)=split(/:/,$userinput);
783: my $ownership=ishome($fname);
784: if ($ownership eq 'not_owner') {
785: if (-e $fname) {
786: my ($dev,$ino,$mode,$nlink,
787: $uid,$gid,$rdev,$size,
788: $atime,$mtime,$ctime,
789: $blksize,$blocks)=stat($fname);
790: $now=time;
791: $since=$now-$atime;
792: if ($since>$perlvar{'lonExpire'}) {
793: $reply=
794: reply("unsub:$fname","$hostid{$clientip}");
795: unlink("$fname");
796: } else {
797: my $transname="$fname.in.transfer";
798: my $remoteurl=
799: reply("sub:$fname","$hostid{$clientip}");
800: my $response;
801: {
802: my $ua=new LWP::UserAgent;
803: my $request=new HTTP::Request('GET',"$remoteurl");
804: $response=$ua->request($request,$transname);
805: }
806: if ($response->is_error()) {
807: unlink($transname);
808: my $message=$response->status_line;
809: &logthis(
810: "LWP GET: $message for $fname ($remoteurl)");
811: } else {
812: if ($remoteurl!~/\.meta$/) {
813: my $ua=new LWP::UserAgent;
814: my $mrequest=
815: new HTTP::Request('GET',$remoteurl.'.meta');
816: my $mresponse=
817: $ua->request($mrequest,$fname.'.meta');
818: if ($mresponse->is_error()) {
819: unlink($fname.'.meta');
820: }
821: }
822: rename($transname,$fname);
823: }
824: }
825: print $client "ok\n";
826: } else {
827: print $client "not_found\n";
828: }
829: } else {
830: print $client "rejected\n";
831: }
832: # ----------------------------------------------------------------- unsubscribe
833: } elsif ($userinput =~ /^unsub/) {
834: my ($cmd,$fname)=split(/:/,$userinput);
835: if (-e $fname) {
836: if (unlink("$fname.$hostid{$clientip}")) {
837: print $client "ok\n";
838: } else {
839: print $client "not_subscribed\n";
840: }
841: } else {
842: print $client "not_found\n";
843: }
844: # ------------------------------------------------------------------- subscribe
845: } elsif ($userinput =~ /^sub/) {
846: my ($cmd,$fname)=split(/:/,$userinput);
847: my $ownership=ishome($fname);
848: if ($ownership eq 'owner') {
849: if (-e $fname) {
850: if (-d $fname) {
851: print $client "directory\n";
852: } else {
853: $now=time;
854: {
855: my $sh;
856: if ($sh=
857: IO::File->new(">$fname.$hostid{$clientip}")) {
858: print $sh "$clientip:$now\n";
859: }
860: }
861: unless ($fname=~/\.meta$/) {
862: unlink("$fname.meta.$hostid{$clientip}");
863: }
864: $fname=~s/\/home\/httpd\/html\/res/raw/;
865: $fname="http://$thisserver/".$fname;
866: print $client "$fname\n";
867: }
868: } else {
869: print $client "not_found\n";
870: }
871: } else {
872: print $client "rejected\n";
873: }
874: # ------------------------------------------------------------------------- log
875: } elsif ($userinput =~ /^log/) {
876: my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
877: chomp($what);
878: my $proname=propath($udom,$uname);
879: my $now=time;
880: {
881: my $hfh;
882: if ($hfh=IO::File->new(">>$proname/activity.log")) {
883: print $hfh "$now:$hostid{$clientip}:$what\n";
884: print $client "ok\n";
885: } else {
886: print $client "error:$!\n";
887: }
888: }
889: # ------------------------------------------------------------------------- put
890: } elsif ($userinput =~ /^put/) {
891: my ($cmd,$udom,$uname,$namespace,$what)
892: =split(/:/,$userinput);
893: $namespace=~s/\//\_/g;
894: $namespace=~s/\W//g;
895: if ($namespace ne 'roles') {
896: chomp($what);
897: my $proname=propath($udom,$uname);
898: my $now=time;
899: unless ($namespace=~/^nohist\_/) {
900: my $hfh;
901: if (
902: $hfh=IO::File->new(">>$proname/$namespace.hist")
903: ) { print $hfh "P:$now:$what\n"; }
904: }
905: my @pairs=split(/\&/,$what);
906: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
907: foreach $pair (@pairs) {
908: ($key,$value)=split(/=/,$pair);
909: $hash{$key}=$value;
910: }
911: if (untie(%hash)) {
912: print $client "ok\n";
913: } else {
914: print $client "error:$!\n";
915: }
916: } else {
917: print $client "error:$!\n";
918: }
919: } else {
920: print $client "refused\n";
921: }
922: # -------------------------------------------------------------------- rolesput
923: } elsif ($userinput =~ /^rolesput/) {
924: if ($wasenc==1) {
925: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
926: =split(/:/,$userinput);
927: my $namespace='roles';
928: chomp($what);
929: my $proname=propath($udom,$uname);
930: my $now=time;
931: {
932: my $hfh;
933: if (
934: $hfh=IO::File->new(">>$proname/$namespace.hist")
935: ) {
936: print $hfh "P:$now:$exedom:$exeuser:$what\n";
937: }
938: }
939: my @pairs=split(/\&/,$what);
940: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
941: foreach $pair (@pairs) {
942: ($key,$value)=split(/=/,$pair);
943: $hash{$key}=$value;
944: }
945: if (untie(%hash)) {
946: print $client "ok\n";
947: } else {
948: print $client "error:$!\n";
949: }
950: } else {
951: print $client "error:$!\n";
952: }
953: } else {
954: print $client "refused\n";
955: }
956: # ------------------------------------------------------------------------- get
957: } elsif ($userinput =~ /^get/) {
958: my ($cmd,$udom,$uname,$namespace,$what)
959: =split(/:/,$userinput);
960: $namespace=~s/\//\_/g;
961: $namespace=~s/\W//g;
962: chomp($what);
963: my @queries=split(/\&/,$what);
964: my $proname=propath($udom,$uname);
965: my $qresult='';
966: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
967: for ($i=0;$i<=$#queries;$i++) {
968: $qresult.="$hash{$queries[$i]}&";
969: }
970: if (untie(%hash)) {
971: $qresult=~s/\&$//;
972: print $client "$qresult\n";
973: } else {
974: print $client "error:$!\n";
975: }
976: } else {
977: print $client "error:$!\n";
978: }
979: # ------------------------------------------------------------------------ eget
980: } elsif ($userinput =~ /^eget/) {
981: my ($cmd,$udom,$uname,$namespace,$what)
982: =split(/:/,$userinput);
983: $namespace=~s/\//\_/g;
984: $namespace=~s/\W//g;
985: chomp($what);
986: my @queries=split(/\&/,$what);
987: my $proname=propath($udom,$uname);
988: my $qresult='';
989: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
990: for ($i=0;$i<=$#queries;$i++) {
991: $qresult.="$hash{$queries[$i]}&";
992: }
993: if (untie(%hash)) {
994: $qresult=~s/\&$//;
995: if ($cipher) {
996: my $cmdlength=length($qresult);
997: $qresult.=" ";
998: my $encqresult='';
999: for
1000: (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
1001: $encqresult.=
1002: unpack("H16",
1003: $cipher->encrypt(substr($qresult,$encidx,8)));
1004: }
1005: print $client "enc:$cmdlength:$encqresult\n";
1006: } else {
1007: print $client "error:no_key\n";
1008: }
1009: } else {
1010: print $client "error:$!\n";
1011: }
1012: } else {
1013: print $client "error:$!\n";
1014: }
1015: # ------------------------------------------------------------------------- del
1016: } elsif ($userinput =~ /^del/) {
1017: my ($cmd,$udom,$uname,$namespace,$what)
1018: =split(/:/,$userinput);
1019: $namespace=~s/\//\_/g;
1020: $namespace=~s/\W//g;
1021: chomp($what);
1022: my $proname=propath($udom,$uname);
1023: my $now=time;
1024: unless ($namespace=~/^nohist\_/) {
1025: my $hfh;
1026: if (
1027: $hfh=IO::File->new(">>$proname/$namespace.hist")
1028: ) { print $hfh "D:$now:$what\n"; }
1029: }
1030: my @keys=split(/\&/,$what);
1031: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1032: foreach $key (@keys) {
1033: delete($hash{$key});
1034: }
1035: if (untie(%hash)) {
1036: print $client "ok\n";
1037: } else {
1038: print $client "error:$!\n";
1039: }
1040: } else {
1041: print $client "error:$!\n";
1042: }
1043: # ------------------------------------------------------------------------ keys
1044: } elsif ($userinput =~ /^keys/) {
1045: my ($cmd,$udom,$uname,$namespace)
1046: =split(/:/,$userinput);
1047: $namespace=~s/\//\_/g;
1048: $namespace=~s/\W//g;
1049: my $proname=propath($udom,$uname);
1050: my $qresult='';
1051: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1052: foreach $key (keys %hash) {
1053: $qresult.="$key&";
1054: }
1055: if (untie(%hash)) {
1056: $qresult=~s/\&$//;
1057: print $client "$qresult\n";
1058: } else {
1059: print $client "error:$!\n";
1060: }
1061: } else {
1062: print $client "error:$!\n";
1063: }
1064: # ------------------------------------------------------------------------ dump
1065: } elsif ($userinput =~ /^dump/) {
1066: my ($cmd,$udom,$uname,$namespace)
1067: =split(/:/,$userinput);
1068: $namespace=~s/\//\_/g;
1069: $namespace=~s/\W//g;
1070: my $proname=propath($udom,$uname);
1071: my $qresult='';
1072: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1073: foreach $key (keys %hash) {
1074: $qresult.="$key=$hash{$key}&";
1075: }
1076: if (untie(%hash)) {
1077: $qresult=~s/\&$//;
1078: print $client "$qresult\n";
1079: } else {
1080: print $client "error:$!\n";
1081: }
1082: } else {
1083: print $client "error:$!\n";
1084: }
1085: # ----------------------------------------------------------------------- store
1086: } elsif ($userinput =~ /^store/) {
1087: my ($cmd,$udom,$uname,$namespace,$rid,$what)
1088: =split(/:/,$userinput);
1089: $namespace=~s/\//\_/g;
1090: $namespace=~s/\W//g;
1091: if ($namespace ne 'roles') {
1092: chomp($what);
1093: my $proname=propath($udom,$uname);
1094: my $now=time;
1095: unless ($namespace=~/^nohist\_/) {
1096: my $hfh;
1097: if (
1098: $hfh=IO::File->new(">>$proname/$namespace.hist")
1099: ) { print $hfh "P:$now:$rid:$what\n"; }
1100: }
1101: my @pairs=split(/\&/,$what);
1102:
1103: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1104: my @previouskeys=split(/&/,$hash{"keys:$rid"});
1105: my $key;
1106: $hash{"version:$rid"}++;
1107: my $version=$hash{"version:$rid"};
1108: my $allkeys='';
1109: foreach $pair (@pairs) {
1110: ($key,$value)=split(/=/,$pair);
1111: $allkeys.=$key.':';
1112: $hash{"$version:$rid:$key"}=$value;
1113: }
1114: $hash{"$version:$rid:timestamp"}=$now;
1115: $allkeys.='timestamp';
1116: $hash{"$version:keys:$rid"}=$allkeys;
1117: if (untie(%hash)) {
1118: print $client "ok\n";
1119: } else {
1120: print $client "error:$!\n";
1121: }
1122: } else {
1123: print $client "error:$!\n";
1124: }
1125: } else {
1126: print $client "refused\n";
1127: }
1128: # --------------------------------------------------------------------- restore
1129: } elsif ($userinput =~ /^restore/) {
1130: my ($cmd,$udom,$uname,$namespace,$rid)
1131: =split(/:/,$userinput);
1132: $namespace=~s/\//\_/g;
1133: $namespace=~s/\W//g;
1134: chomp($rid);
1135: my $proname=propath($udom,$uname);
1136: my $qresult='';
1137: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1138: my $version=$hash{"version:$rid"};
1139: $qresult.="version=$version&";
1140: my $scope;
1141: for ($scope=1;$scope<=$version;$scope++) {
1142: my $vkeys=$hash{"$scope:keys:$rid"};
1143: my @keys=split(/:/,$vkeys);
1144: my $key;
1145: $qresult.="$scope:keys=$vkeys&";
1146: foreach $key (@keys) {
1147: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
1148: }
1149: }
1150: if (untie(%hash)) {
1151: $qresult=~s/\&$//;
1152: print $client "$qresult\n";
1153: } else {
1154: print $client "error:$!\n";
1155: }
1156: } else {
1157: print $client "error:$!\n";
1158: }
1159: # ------------------------------------------------------------------- querysend
1160: } elsif ($userinput =~ /^querysend/) {
1161: my ($cmd,$query,
1162: $custom,$customshow)=split(/:/,$userinput);
1163: $query=~s/\n*$//g;
1164: unless ($custom or $customshow) {
1165: print $client "".
1166: sqlreply("$hostid{$clientip}\&$query")."\n";
1167: }
1168: else {
1169: print $client "".
1170: sqlreply("$hostid{$clientip}\&$query".
1171: "\&$custom"."\&$customshow")."\n";
1172: }
1173: # ------------------------------------------------------------------ queryreply
1174: } elsif ($userinput =~ /^queryreply/) {
1175: my ($cmd,$id,$reply)=split(/:/,$userinput);
1176: my $store;
1177: my $execdir=$perlvar{'lonDaemons'};
1178: if ($store=IO::File->new(">$execdir/tmp/$id")) {
1179: $reply=~s/\&/\n/g;
1180: print $store $reply;
1181: close $store;
1182: my $store2=IO::File->new(">$execdir/tmp/$id.end");
1183: print $store2 "done\n";
1184: close $store2;
1185: print $client "ok\n";
1186: }
1187: else {
1188: print $client "error:$!\n";
1189: }
1190: # ----------------------------------------------------------------------- idput
1191: } elsif ($userinput =~ /^idput/) {
1192: my ($cmd,$udom,$what)=split(/:/,$userinput);
1193: chomp($what);
1194: $udom=~s/\W//g;
1195: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
1196: my $now=time;
1197: {
1198: my $hfh;
1199: if (
1200: $hfh=IO::File->new(">>$proname.hist")
1201: ) { print $hfh "P:$now:$what\n"; }
1202: }
1203: my @pairs=split(/\&/,$what);
1204: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT,0640)) {
1205: foreach $pair (@pairs) {
1206: ($key,$value)=split(/=/,$pair);
1207: $hash{$key}=$value;
1208: }
1209: if (untie(%hash)) {
1210: print $client "ok\n";
1211: } else {
1212: print $client "error:$!\n";
1213: }
1214: } else {
1215: print $client "error:$!\n";
1216: }
1217: # ----------------------------------------------------------------------- idget
1218: } elsif ($userinput =~ /^idget/) {
1219: my ($cmd,$udom,$what)=split(/:/,$userinput);
1220: chomp($what);
1221: $udom=~s/\W//g;
1222: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
1223: my @queries=split(/\&/,$what);
1224: my $qresult='';
1225: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER,0640)) {
1226: for ($i=0;$i<=$#queries;$i++) {
1227: $qresult.="$hash{$queries[$i]}&";
1228: }
1229: if (untie(%hash)) {
1230: $qresult=~s/\&$//;
1231: print $client "$qresult\n";
1232: } else {
1233: print $client "error:$!\n";
1234: }
1235: } else {
1236: print $client "error:$!\n";
1237: }
1238: # ---------------------------------------------------------------------- tmpput
1239: } elsif ($userinput =~ /^tmpput/) {
1240: my ($cmd,$what)=split(/:/,$userinput);
1241: my $store;
1242: $tmpsnum++;
1243: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
1244: $id=~s/\W/\_/g;
1245: $what=~s/\n//g;
1246: my $execdir=$perlvar{'lonDaemons'};
1247: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
1248: print $store $what;
1249: close $store;
1250: print $client "$id\n";
1251: }
1252: else {
1253: print $client "error:$!\n";
1254: }
1255:
1256: # ---------------------------------------------------------------------- tmpget
1257: } elsif ($userinput =~ /^tmpget/) {
1258: my ($cmd,$id)=split(/:/,$userinput);
1259: chomp($id);
1260: $id=~s/\W/\_/g;
1261: my $store;
1262: my $execdir=$perlvar{'lonDaemons'};
1263: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
1264: my $reply=<$store>;
1265: print $client "$reply\n";
1266: close $store;
1267: }
1268: else {
1269: print $client "error:$!\n";
1270: }
1271:
1272: # -------------------------------------------------------------------------- ls
1273: } elsif ($userinput =~ /^ls/) {
1274: my ($cmd,$ulsdir)=split(/:/,$userinput);
1275: my $ulsout='';
1276: my $ulsfn;
1277: if (-e $ulsdir) {
1278: if (opendir(LSDIR,$ulsdir)) {
1279: while ($ulsfn=readdir(LSDIR)) {
1280: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1281: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1282: }
1283: closedir(LSDIR);
1284: }
1285: } else {
1286: $ulsout='no_such_dir';
1287: }
1288: if ($ulsout eq '') { $ulsout='empty'; }
1289: print $client "$ulsout\n";
1290: # ------------------------------------------------------------------ Hanging up
1291: } elsif (($userinput =~ /^exit/) ||
1292: ($userinput =~ /^init/)) {
1293: &logthis(
1294: "Client $clientip ($hostid{$clientip}) hanging up: $userinput");
1295: print $client "bye\n";
1296: last;
1297: # ------------------------------------------------------------- unknown command
1298: } else {
1299: # unknown command
1300: print $client "unknown_cmd\n";
1301: }
1302: # ------------------------------------------------------ client unknown, refuse
1303: }
1304: } else {
1305: print $client "refused\n";
1306: &logthis("<font color=blue>WARNING: "
1307: ."Rejected client $clientip, closing connection</font>");
1308: }
1309: &logthis("<font color=red>CRITICAL: "
1310: ."Disconnect from $clientip ($hostid{$clientip})</font>");
1311: # =============================================================================
1312: }
1313:
1314: # tidy up gracefully and finish
1315:
1316: # this exit is VERY important, otherwise the child will become
1317: # a producer of more and more children, forking yourself into
1318: # process death.
1319: exit;
1320: }
1321: }
1322:
1323:
1324:
1325:
1326:
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