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