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: # based on "Perl Cookbook" ISBN 1-56592-243-3
13: # preforker - server who forks first
14: # runs as a daemon
15: # HUPs
16: # uses IDEA encryption
17:
18: use IO::Socket;
19: use IO::File;
20: use Apache::File;
21: use Symbol;
22: use POSIX;
23: use Crypt::IDEA;
24: use LWP::UserAgent();
25: use GDBM_File;
26: use Authen::Krb4;
27:
28: # ------------------------------------ Read httpd access.conf and get variables
29:
30: open (CONFIG,"/etc/httpd/conf/access.conf") || die "Can't read access.conf";
31:
32: while ($configline=<CONFIG>) {
33: if ($configline =~ /PerlSetVar/) {
34: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
35: chomp($varvalue);
36: $perlvar{$varname}=$varvalue;
37: }
38: }
39: close(CONFIG);
40:
41: # --------------------------------------------- Check if other instance running
42:
43: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
44:
45: if (-e $pidfile) {
46: my $lfh=IO::File->new("$pidfile");
47: my $pide=<$lfh>;
48: chomp($pide);
49: if (kill 0 => $pide) { die "already running"; }
50: }
51:
52: $PREFORK=4; # number of children to maintain, at least four spare
53:
54: # ------------------------------------------------------------- Read hosts file
55:
56: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
57:
58: while ($configline=<CONFIG>) {
59: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
60: chomp($ip);
61: $hostid{$ip}=$id;
62: if ($id eq $perlvar{'lonHostID'}) { $thisserver=$name; }
63: $PREFORK++;
64: }
65: close(CONFIG);
66:
67: # establish SERVER socket, bind and listen.
68: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
69: Type => SOCK_STREAM,
70: Proto => 'tcp',
71: Reuse => 1,
72: Listen => 10 )
73: or die "making socket: $@\n";
74:
75: # --------------------------------------------------------- Do global variables
76:
77: # global variables
78:
79: $MAX_CLIENTS_PER_CHILD = 5; # number of clients each child should
80: # process
81: %children = (); # keys are current child process IDs
82: $children = 0; # current number of children
83:
84: sub REAPER { # takes care of dead children
85: $SIG{CHLD} = \&REAPER;
86: my $pid = wait;
87: $children --;
88: &logthis("Child $pid died");
89: delete $children{$pid};
90: }
91:
92: sub HUNTSMAN { # signal handler for SIGINT
93: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
94: kill 'INT' => keys %children;
95: my $execdir=$perlvar{'lonDaemons'};
96: unlink("$execdir/logs/lond.pid");
97: &logthis("<font color=red>CRITICAL: Shutting down</font>");
98: exit; # clean up with dignity
99: }
100:
101: sub HUPSMAN { # signal handler for SIGHUP
102: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
103: kill 'INT' => keys %children;
104: close($server); # free up socket
105: &logthis("<font color=red>CRITICAL: Restarting</font>");
106: my $execdir=$perlvar{'lonDaemons'};
107: exec("$execdir/lond"); # here we go again
108: }
109:
110: # --------------------------------------------------------------------- Logging
111:
112: sub logthis {
113: my $message=shift;
114: my $execdir=$perlvar{'lonDaemons'};
115: my $fh=IO::File->new(">>$execdir/logs/lond.log");
116: my $now=time;
117: my $local=localtime($now);
118: print $fh "$local ($$): $message\n";
119: }
120:
121:
122: # -------------------------------------------------------- Escape Special Chars
123:
124: sub escape {
125: my $str=shift;
126: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
127: return $str;
128: }
129:
130: # ----------------------------------------------------- Un-Escape Special Chars
131:
132: sub unescape {
133: my $str=shift;
134: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
135: return $str;
136: }
137:
138: # ----------------------------------------------------------- Send USR1 to lonc
139:
140: sub reconlonc {
141: my $peerfile=shift;
142: &logthis("Trying to reconnect for $peerfile");
143: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
144: if (my $fh=IO::File->new("$loncfile")) {
145: my $loncpid=<$fh>;
146: chomp($loncpid);
147: if (kill 0 => $loncpid) {
148: &logthis("lonc at pid $loncpid responding, sending USR1");
149: kill USR1 => $loncpid;
150: sleep 1;
151: if (-e "$peerfile") { return; }
152: &logthis("$peerfile still not there, give it another try");
153: sleep 5;
154: if (-e "$peerfile") { return; }
155: &logthis(
156: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
157: } else {
158: &logthis(
159: "<font color=red>CRITICAL: "
160: ."lonc at pid $loncpid not responding, giving up</font>");
161: }
162: } else {
163: &logthis('<font color=red>CRITICAL: lonc not running, giving up</font>');
164: }
165: }
166:
167: # -------------------------------------------------- Non-critical communication
168:
169: sub subreply {
170: my ($cmd,$server)=@_;
171: my $peerfile="$perlvar{'lonSockDir'}/$server";
172: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
173: Type => SOCK_STREAM,
174: Timeout => 10)
175: or return "con_lost";
176: print $sclient "$cmd\n";
177: my $answer=<$sclient>;
178: chomp($answer);
179: if (!$answer) { $answer="con_lost"; }
180: return $answer;
181: }
182:
183: sub reply {
184: my ($cmd,$server)=@_;
185: my $answer;
186: if ($server ne $perlvar{'lonHostID'}) {
187: $answer=subreply($cmd,$server);
188: if ($answer eq 'con_lost') {
189: $answer=subreply("ping",$server);
190: if ($answer ne $server) {
191: &reconlonc("$perlvar{'lonSockDir'}/$server");
192: }
193: $answer=subreply($cmd,$server);
194: }
195: } else {
196: $answer='self_reply';
197: }
198: return $answer;
199: }
200:
201: # -------------------------------------------------------------- Talk to lonsql
202:
203: sub sqlreply {
204: my ($cmd)=@_;
205: my $answer=subsqlreply($cmd);
206: if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }
207: return $answer;
208: }
209:
210: sub subsqlreply {
211: my ($cmd)=@_;
212: my $unixsock="mysqlsock";
213: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
214: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
215: Type => SOCK_STREAM,
216: Timeout => 10)
217: or return "con_lost";
218: print $sclient "$cmd\n";
219: my $answer=<$sclient>;
220: chomp($answer);
221: if (!$answer) { $answer="con_lost"; }
222: return $answer;
223: }
224:
225: # -------------------------------------------- Return path to profile directory
226:
227: sub propath {
228: my ($udom,$uname)=@_;
229: $udom=~s/\W//g;
230: $uname=~s/\W//g;
231: my $subdir=$uname.'__';
232: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
233: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
234: return $proname;
235: }
236:
237: # --------------------------------------- Is this the home server of an author?
238:
239: sub ishome {
240: my $author=shift;
241: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
242: my ($udom,$uname)=split(/\//,$author);
243: my $proname=propath($udom,$uname);
244: if (-e $proname) {
245: return 'owner';
246: } else {
247: return 'not_owner';
248: }
249: }
250:
251: # ======================================================= Continue main program
252: # ---------------------------------------------------- Fork once and dissociate
253:
254: $fpid=fork;
255: exit if $fpid;
256: die "Couldn't fork: $!" unless defined ($fpid);
257:
258: POSIX::setsid() or die "Can't start new session: $!";
259:
260: # ------------------------------------------------------- Write our PID on disk
261:
262: $execdir=$perlvar{'lonDaemons'};
263: open (PIDSAVE,">$execdir/logs/lond.pid");
264: print PIDSAVE "$$\n";
265: close(PIDSAVE);
266: &logthis("<font color=red>CRITICAL: ---------- Starting ----------</font>");
267:
268: # ------------------------------------------------------- Now we are on our own
269:
270: # Fork off our children.
271: for (1 .. $PREFORK) {
272: make_new_child();
273: }
274:
275: # ----------------------------------------------------- Install signal handlers
276:
277: $SIG{CHLD} = \&REAPER;
278: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
279: $SIG{HUP} = \&HUPSMAN;
280:
281: # And maintain the population.
282: while (1) {
283: sleep; # wait for a signal (i.e., child's death)
284: for ($i = $children; $i < $PREFORK; $i++) {
285: make_new_child(); # top up the child pool
286: }
287: }
288:
289: sub make_new_child {
290: my $pid;
291: my $cipher;
292: my $sigset;
293: &logthis("Attempting to start child");
294: # block signal for fork
295: $sigset = POSIX::SigSet->new(SIGINT);
296: sigprocmask(SIG_BLOCK, $sigset)
297: or die "Can't block SIGINT for fork: $!\n";
298:
299: die "fork: $!" unless defined ($pid = fork);
300:
301: if ($pid) {
302: # Parent records the child's birth and returns.
303: sigprocmask(SIG_UNBLOCK, $sigset)
304: or die "Can't unblock SIGINT for fork: $!\n";
305: $children{$pid} = 1;
306: $children++;
307: return;
308: } else {
309: # Child can *not* return from this subroutine.
310: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
311:
312: # unblock signals
313: sigprocmask(SIG_UNBLOCK, $sigset)
314: or die "Can't unblock SIGINT for fork: $!\n";
315:
316: $tmpsnum=0;
317:
318: # handle connections until we've reached $MAX_CLIENTS_PER_CHILD
319: for ($i=0; $i < $MAX_CLIENTS_PER_CHILD; $i++) {
320: $client = $server->accept() or last;
321:
322: # =============================================================================
323: # do something with the connection
324: # -----------------------------------------------------------------------------
325: # see if we know client and check for spoof IP by challenge
326: my $caller=getpeername($client);
327: my ($port,$iaddr)=unpack_sockaddr_in($caller);
328: my $clientip=inet_ntoa($iaddr);
329: my $clientrec=($hostid{$clientip} ne undef);
330: &logthis(
331: "<font color=yellow>INFO: Connect from $clientip ($hostid{$clientip})</font>");
332: my $clientok;
333: if ($clientrec) {
334: my $remotereq=<$client>;
335: $remotereq=~s/\W//g;
336: if ($remotereq eq 'init') {
337: my $challenge="$$".time;
338: print $client "$challenge\n";
339: $remotereq=<$client>;
340: $remotereq=~s/\W//g;
341: if ($challenge eq $remotereq) {
342: $clientok=1;
343: print $client "ok\n";
344: } else {
345: &logthis(
346: "<font color=blue>WARNING: $clientip did not reply challenge</font>");
347: print $client "bye\n";
348: }
349: } else {
350: &logthis(
351: "<font color=blue>WARNING: "
352: ."$clientip failed to initialize: >$remotereq< </font>");
353: print $client "bye\n";
354: }
355: } else {
356: &logthis(
357: "<font color=blue>WARNING: Unknown client $clientip</font>");
358: print $client "bye\n";
359: }
360: if ($clientok) {
361: # ---------------- New known client connecting, could mean machine online again
362: &reconlonc("$perlvar{'lonSockDir'}/$hostid{$clientip}");
363: &logthis(
364: "<font color=green>Established connection: $hostid{$clientip}</font>");
365: # ------------------------------------------------------------ Process requests
366: while (my $userinput=<$client>) {
367: chomp($userinput);
368: my $wasenc=0;
369: # ------------------------------------------------------------ See if encrypted
370: if ($userinput =~ /^enc/) {
371: if ($cipher) {
372: my ($cmd,$cmdlength,$encinput)=split(/:/,$userinput);
373: $userinput='';
374: for (my $encidx=0;$encidx<length($encinput);$encidx+=16) {
375: $userinput.=
376: $cipher->decrypt(
377: pack("H16",substr($encinput,$encidx,16))
378: );
379: }
380: $userinput=substr($userinput,0,$cmdlength);
381: $wasenc=1;
382: }
383: }
384: # ------------------------------------------------------------- Normal commands
385: # ------------------------------------------------------------------------ ping
386: if ($userinput =~ /^ping/) {
387: print $client "$perlvar{'lonHostID'}\n";
388: # ------------------------------------------------------------------------ pong
389: } elsif ($userinput =~ /^pong/) {
390: $reply=reply("ping",$hostid{$clientip});
391: print $client "$perlvar{'lonHostID'}:$reply\n";
392: # ------------------------------------------------------------------------ ekey
393: } elsif ($userinput =~ /^ekey/) {
394: my $buildkey=time.$$.int(rand 100000);
395: $buildkey=~tr/1-6/A-F/;
396: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
397: my $key=$perlvar{'lonHostID'}.$hostid{$clientip};
398: $key=~tr/a-z/A-Z/;
399: $key=~tr/G-P/0-9/;
400: $key=~tr/Q-Z/0-9/;
401: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
402: $key=substr($key,0,32);
403: my $cipherkey=pack("H32",$key);
404: $cipher=new IDEA $cipherkey;
405: print $client "$buildkey\n";
406: # ------------------------------------------------------------------------ load
407: } elsif ($userinput =~ /^load/) {
408: my $loadavg;
409: {
410: my $loadfile=IO::File->new('/proc/loadavg');
411: $loadavg=<$loadfile>;
412: }
413: $loadavg =~ s/\s.*//g;
414: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
415: print $client "$loadpercent\n";
416: # ------------------------------------------------------------------------ auth
417: } elsif ($userinput =~ /^auth/) {
418: if ($wasenc==1) {
419: my ($cmd,$udom,$uname,$upass)=split(/:/,$userinput);
420: chomp($upass);
421: $upass=unescape($upass);
422: my $proname=propath($udom,$uname);
423: my $passfilename="$proname/passwd";
424: if (-e $passfilename) {
425: my $pf = IO::File->new($passfilename);
426: my $realpasswd=<$pf>;
427: chomp($realpasswd);
428: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
429: my $pwdcorrect=0;
430: if ($howpwd eq 'internal') {
431: $pwdcorrect=
432: (crypt($upass,$contentpwd) eq $contentpwd);
433: } elsif ($howpwd eq 'unix') {
434: $contentpwd=(getpwnam($uname))[1];
435: $pwdcorrect=
436: (crypt($upass,$contentpwd) eq $contentpwd);
437: } elsif ($howpwd eq 'krb4') {
438: $pwdcorrect=(
439: Authen::Krb4::get_pw_in_tkt($uname,"",
440: $contentpwd,'krbtgt',$contentpwd,1,
441: $upass) == 0);
442: }
443: if ($pwdcorrect) {
444: print $client "authorized\n";
445: } else {
446: print $client "non_authorized\n";
447: }
448: } else {
449: print $client "unknown_user\n";
450: }
451: } else {
452: print $client "refused\n";
453: }
454: # ---------------------------------------------------------------------- passwd
455: } elsif ($userinput =~ /^passwd/) {
456: if ($wasenc==1) {
457: my
458: ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
459: chomp($npass);
460: my $proname=propath($udom,$uname);
461: my $passfilename="$proname/passwd";
462: if (-e $passfilename) {
463: my $realpasswd;
464: { my $pf = IO::File->new($passfilename);
465: $realpasswd=<$pf>; }
466: chomp($realpasswd);
467: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
468: if ($howpwd eq 'internal') {
469: if (crypt($upass,$contentpwd) eq $contentpwd) {
470: my $salt=time;
471: $salt=substr($salt,6,2);
472: my $ncpass=crypt($npass,$salt);
473: { my $pf = IO::File->new(">$passfilename");
474: print $pf "internal:$ncpass\n";; }
475: print $client "ok\n";
476: } else {
477: print $client "non_authorized\n";
478: }
479: } else {
480: print $client "auth_mode_error\n";
481: }
482: } else {
483: print $client "unknown_user\n";
484: }
485: } else {
486: print $client "refused\n";
487: }
488: # ------------------------------------------------------------------------ home
489: } elsif ($userinput =~ /^home/) {
490: my ($cmd,$udom,$uname)=split(/:/,$userinput);
491: chomp($uname);
492: my $proname=propath($udom,$uname);
493: if (-e $proname) {
494: print $client "found\n";
495: } else {
496: print $client "not_found\n";
497: }
498: # ---------------------------------------------------------------------- update
499: } elsif ($userinput =~ /^update/) {
500: my ($cmd,$fname)=split(/:/,$userinput);
501: my $ownership=ishome($fname);
502: if ($ownership eq 'not_owner') {
503: if (-e $fname) {
504: my ($dev,$ino,$mode,$nlink,
505: $uid,$gid,$rdev,$size,
506: $atime,$mtime,$ctime,
507: $blksize,$blocks)=stat($fname);
508: $now=time;
509: $since=$now-$atime;
510: if ($since>$perlvar{'lonExpire'}) {
511: $reply=
512: reply("unsub:$fname","$hostid{$clientip}");
513: unlink("$fname");
514: } else {
515: my $transname="$fname.in.transfer";
516: my $remoteurl=
517: reply("sub:$fname","$hostid{$clientip}");
518: my $response;
519: {
520: my $ua=new LWP::UserAgent;
521: my $request=new HTTP::Request('GET',"$remoteurl");
522: $response=$ua->request($request,$transname);
523: }
524: if ($response->is_error()) {
525: unline($transname);
526: my $message=$response->status_line;
527: &logthis(
528: "LWP GET: $message for $fname ($remoteurl)");
529: } else {
530: if ($remoteurl!~/\.meta$/) {
531: my $mrequest=
532: new HTTP::Request('GET',$remoteurl.'.meta');
533: my $mresponse=
534: $ua->request($mrequest,$fname.'.meta');
535: if ($mresponse->is_error()) {
536: unlink($fname.'.meta');
537: }
538: }
539: rename($transname,$fname);
540: }
541: }
542: print $client "ok\n";
543: } else {
544: print $client "not_found\n";
545: }
546: } else {
547: print $client "rejected\n";
548: }
549: # ----------------------------------------------------------------- unsubscribe
550: } elsif ($userinput =~ /^unsub/) {
551: my ($cmd,$fname)=split(/:/,$userinput);
552: if (-e $fname) {
553: if (unlink("$fname.$hostid{$clientip}")) {
554: print $client "ok\n";
555: } else {
556: print $client "not_subscribed\n";
557: }
558: } else {
559: print $client "not_found\n";
560: }
561: # ------------------------------------------------------------------- subscribe
562: } elsif ($userinput =~ /^sub/) {
563: my ($cmd,$fname)=split(/:/,$userinput);
564: my $ownership=ishome($fname);
565: if ($ownership eq 'owner') {
566: if (-e $fname) {
567: if (-d $fname) {
568: print $client "directory\n";
569: } else {
570: $now=time;
571: {
572: my $sh=IO::File->new(">$fname.$hostid{$clientip}");
573: print $sh "$clientip:$now\n";
574: }
575: $fname=~s/\/home\/httpd\/html\/res/raw/;
576: $fname="http://$thisserver/".$fname;
577: print $client "$fname\n";
578: }
579: } else {
580: print $client "not_found\n";
581: }
582: } else {
583: print $client "rejected\n";
584: }
585: # ------------------------------------------------------------------------- log
586: } elsif ($userinput =~ /^log/) {
587: my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
588: chomp($what);
589: my $proname=propath($udom,$uname);
590: my $now=time;
591: {
592: my $hfh;
593: if ($hfh=IO::File->new(">>$proname/activity.log")) {
594: print $hfh "$now:$hostid{$clientip}:$what\n";
595: print $client "ok\n";
596: } else {
597: print $client "error:$!\n";
598: }
599: }
600: # ------------------------------------------------------------------------- put
601: } elsif ($userinput =~ /^put/) {
602: my ($cmd,$udom,$uname,$namespace,$what)
603: =split(/:/,$userinput);
604: $namespace=~s/\//\_/g;
605: $namespace=~s/\W//g;
606: if ($namespace ne 'roles') {
607: chomp($what);
608: my $proname=propath($udom,$uname);
609: my $now=time;
610: {
611: my $hfh;
612: if (
613: $hfh=IO::File->new(">>$proname/$namespace.hist")
614: ) { print $hfh "P:$now:$what\n"; }
615: }
616: my @pairs=split(/\&/,$what);
617: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
618: foreach $pair (@pairs) {
619: ($key,$value)=split(/=/,$pair);
620: $hash{$key}=$value;
621: }
622: if (untie(%hash)) {
623: print $client "ok\n";
624: } else {
625: print $client "error:$!\n";
626: }
627: } else {
628: print $client "error:$!\n";
629: }
630: } else {
631: print $client "refused\n";
632: }
633: # -------------------------------------------------------------------- rolesput
634: } elsif ($userinput =~ /^rolesput/) {
635: if ($wasenc==1) {
636: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
637: =split(/:/,$userinput);
638: my $namespace='roles';
639: chomp($what);
640: my $proname=propath($udom,$uname);
641: my $now=time;
642: {
643: my $hfh;
644: if (
645: $hfh=IO::File->new(">>$proname/$namespace.hist")
646: ) {
647: print $hfh "P:$now:$exedom:$exeuser:$what\n";
648: }
649: }
650: my @pairs=split(/\&/,$what);
651: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
652: foreach $pair (@pairs) {
653: ($key,$value)=split(/=/,$pair);
654: $hash{$key}=$value;
655: }
656: if (untie(%hash)) {
657: print $client "ok\n";
658: } else {
659: print $client "error:$!\n";
660: }
661: } else {
662: print $client "error:$!\n";
663: }
664: } else {
665: print $client "refused\n";
666: }
667: # ------------------------------------------------------------------------- get
668: } elsif ($userinput =~ /^get/) {
669: my ($cmd,$udom,$uname,$namespace,$what)
670: =split(/:/,$userinput);
671: $namespace=~s/\//\_/g;
672: $namespace=~s/\W//g;
673: chomp($what);
674: my @queries=split(/\&/,$what);
675: my $proname=propath($udom,$uname);
676: my $qresult='';
677: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
678: for ($i=0;$i<=$#queries;$i++) {
679: $qresult.="$hash{$queries[$i]}&";
680: }
681: if (untie(%hash)) {
682: $qresult=~s/\&$//;
683: print $client "$qresult\n";
684: } else {
685: print $client "error:$!\n";
686: }
687: } else {
688: print $client "error:$!\n";
689: }
690: # ------------------------------------------------------------------------ eget
691: } elsif ($userinput =~ /^eget/) {
692: my ($cmd,$udom,$uname,$namespace,$what)
693: =split(/:/,$userinput);
694: $namespace=~s/\//\_/g;
695: $namespace=~s/\W//g;
696: chomp($what);
697: my @queries=split(/\&/,$what);
698: my $proname=propath($udom,$uname);
699: my $qresult='';
700: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
701: for ($i=0;$i<=$#queries;$i++) {
702: $qresult.="$hash{$queries[$i]}&";
703: }
704: if (untie(%hash)) {
705: $qresult=~s/\&$//;
706: if ($cipher) {
707: my $cmdlength=length($qresult);
708: $qresult.=" ";
709: my $encqresult='';
710: for
711: (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
712: $encqresult.=
713: unpack("H16",
714: $cipher->encrypt(substr($qresult,$encidx,8)));
715: }
716: print $client "enc:$cmdlength:$encqresult\n";
717: } else {
718: print $client "error:no_key\n";
719: }
720: } else {
721: print $client "error:$!\n";
722: }
723: } else {
724: print $client "error:$!\n";
725: }
726: # ------------------------------------------------------------------------- del
727: } elsif ($userinput =~ /^del/) {
728: my ($cmd,$udom,$uname,$namespace,$what)
729: =split(/:/,$userinput);
730: $namespace=~s/\//\_/g;
731: $namespace=~s/\W//g;
732: chomp($what);
733: my $proname=propath($udom,$uname);
734: my $now=time;
735: {
736: my $hfh;
737: if (
738: $hfh=IO::File->new(">>$proname/$namespace.hist")
739: ) { print $hfh "D:$now:$what\n"; }
740: }
741: my @keys=split(/\&/,$what);
742: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
743: foreach $key (@keys) {
744: delete($hash{$key});
745: }
746: if (untie(%hash)) {
747: print $client "ok\n";
748: } else {
749: print $client "error:$!\n";
750: }
751: } else {
752: print $client "error:$!\n";
753: }
754: # ------------------------------------------------------------------------ keys
755: } elsif ($userinput =~ /^keys/) {
756: my ($cmd,$udom,$uname,$namespace)
757: =split(/:/,$userinput);
758: $namespace=~s/\//\_/g;
759: $namespace=~s/\W//g;
760: my $proname=propath($udom,$uname);
761: my $qresult='';
762: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
763: foreach $key (keys %hash) {
764: $qresult.="$key&";
765: }
766: if (untie(%hash)) {
767: $qresult=~s/\&$//;
768: print $client "$qresult\n";
769: } else {
770: print $client "error:$!\n";
771: }
772: } else {
773: print $client "error:$!\n";
774: }
775: # ------------------------------------------------------------------------ dump
776: } elsif ($userinput =~ /^dump/) {
777: my ($cmd,$udom,$uname,$namespace)
778: =split(/:/,$userinput);
779: $namespace=~s/\//\_/g;
780: $namespace=~s/\W//g;
781: my $proname=propath($udom,$uname);
782: my $qresult='';
783: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
784: foreach $key (keys %hash) {
785: $qresult.="$key=$hash{$key}&";
786: }
787: if (untie(%hash)) {
788: $qresult=~s/\&$//;
789: print $client "$qresult\n";
790: } else {
791: print $client "error:$!\n";
792: }
793: } else {
794: print $client "error:$!\n";
795: }
796: # ----------------------------------------------------------------------- store
797: } elsif ($userinput =~ /^store/) {
798: my ($cmd,$udom,$uname,$namespace,$rid,$what)
799: =split(/:/,$userinput);
800: $namespace=~s/\//\_/g;
801: $namespace=~s/\W//g;
802: if ($namespace ne 'roles') {
803: chomp($what);
804: my $proname=propath($udom,$uname);
805: my $now=time;
806: {
807: my $hfh;
808: if (
809: $hfh=IO::File->new(">>$proname/$namespace.hist")
810: ) { print $hfh "P:$now:$rid:$what\n"; }
811: }
812: my @pairs=split(/\&/,$what);
813:
814: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
815: my @previouskeys=split(/&/,$hash{"keys:$rid"});
816: my $key;
817: $hash{"version:$rid"}++;
818: my $version=$hash{"version:$rid"};
819: my $allkeys='';
820: foreach $pair (@pairs) {
821: ($key,$value)=split(/=/,$pair);
822: $allkeys.=$key.':';
823: $hash{"$version:$rid:$key"}=$value;
824: }
825: $allkeys=~s/:$//;
826: $hash{"$version:keys:$rid"}=$allkeys;
827: if (untie(%hash)) {
828: print $client "ok\n";
829: } else {
830: print $client "error:$!\n";
831: }
832: } else {
833: print $client "error:$!\n";
834: }
835: } else {
836: print $client "refused\n";
837: }
838: # --------------------------------------------------------------------- restore
839: } elsif ($userinput =~ /^restore/) {
840: my ($cmd,$udom,$uname,$namespace,$rid)
841: =split(/:/,$userinput);
842: $namespace=~s/\//\_/g;
843: $namespace=~s/\W//g;
844: chomp($rid);
845: my $proname=propath($udom,$uname);
846: my $qresult='';
847: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
848: my $version=$hash{"version:$rid"};
849: $qresult.="version=$version&";
850: my $scope;
851: for ($scope=1;$scope<=$version;$scope++) {
852: my $vkeys=$hash{"$scope:keys:$rid"};
853: my @keys=split(/:/,$vkeys);
854: my $key;
855: $qresult.="$scope:keys=$vkeys&";
856: foreach $key (@keys) {
857: $qresult.="$version:$key=".$hash{"$scope:$rid:$key"}."&";
858: }
859: }
860: if (untie(%hash)) {
861: $qresult=~s/\&$//;
862: print $client "$qresult\n";
863: } else {
864: print $client "error:$!\n";
865: }
866: } else {
867: print $client "error:$!\n";
868: }
869: # ------------------------------------------------------------------- querysend
870: } elsif ($userinput =~ /^querysend/) {
871: my ($cmd,$query)=split(/:/,$userinput);
872: $query=~s/\n*$//g;
873: print $client sqlreply("$hostid{$clientip}\&$query")."\n";
874: # ------------------------------------------------------------------ queryreply
875: } elsif ($userinput =~ /^queryreply/) {
876: my ($cmd,$id,$reply)=split(/:/,$userinput);
877: my $store;
878: my $execdir=$perlvar{'lonDaemons'};
879: if ($store=IO::File->new(">$execdir/tmp/$id")) {
880: print $store $reply;
881: close $store;
882: print $client "ok\n";
883: }
884: else {
885: print $client "error:$!\n";
886: }
887: # ----------------------------------------------------------------------- idput
888: } elsif ($userinput =~ /^idput/) {
889: my ($cmd,$udom,$what)=split(/:/,$userinput);
890: chomp($what);
891: $udom=~s/\W//g;
892: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
893: my $now=time;
894: {
895: my $hfh;
896: if (
897: $hfh=IO::File->new(">>$proname.hist")
898: ) { print $hfh "P:$now:$what\n"; }
899: }
900: my @pairs=split(/\&/,$what);
901: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT,0640)) {
902: foreach $pair (@pairs) {
903: ($key,$value)=split(/=/,$pair);
904: $hash{$key}=$value;
905: }
906: if (untie(%hash)) {
907: print $client "ok\n";
908: } else {
909: print $client "error:$!\n";
910: }
911: } else {
912: print $client "error:$!\n";
913: }
914: # ----------------------------------------------------------------------- idget
915: } elsif ($userinput =~ /^idget/) {
916: my ($cmd,$udom,$what)=split(/:/,$userinput);
917: chomp($what);
918: $udom=~s/\W//g;
919: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
920: my @queries=split(/\&/,$what);
921: my $qresult='';
922: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER,0640)) {
923: for ($i=0;$i<=$#queries;$i++) {
924: $qresult.="$hash{$queries[$i]}&";
925: }
926: if (untie(%hash)) {
927: $qresult=~s/\&$//;
928: print $client "$qresult\n";
929: } else {
930: print $client "error:$!\n";
931: }
932: } else {
933: print $client "error:$!\n";
934: }
935: # ---------------------------------------------------------------------- tmpput
936: } elsif ($userinput =~ /^tmpput/) {
937: my ($cmd,$what)=split(/:/,$userinput);
938: my $store;
939: $tmpsnum++;
940: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
941: $id=~s/\W/\_/g;
942: $what=~s/\n//g;
943: my $execdir=$perlvar{'lonDaemons'};
944: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
945: print $store $what;
946: close $store;
947: print $client "$id\n";
948: }
949: else {
950: print $client "error:$!\n";
951: }
952:
953: # ---------------------------------------------------------------------- tmpget
954: } elsif ($userinput =~ /^tmpget/) {
955: my ($cmd,$id)=split(/:/,$userinput);
956: chomp($id);
957: $id=~s/\W/\_/g;
958: my $store;
959: my $execdir=$perlvar{'lonDaemons'};
960: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
961: my $reply=<$store>;
962: print $client "$reply\n";
963: close $store;
964: }
965: else {
966: print $client "error:$!\n";
967: }
968:
969: # -------------------------------------------------------------------------- ls
970: } elsif ($userinput =~ /^ls/) {
971: my ($cmd,$ulsdir)=split(/:/,$userinput);
972: my $ulsout='';
973: my $ulsfn;
974: if (-e $ulsdir) {
975: while ($ulsfn=<$ulsdir/*>) {
976: my @ulsstats=stat($ulsfn);
977: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
978: }
979: } else {
980: $ulsout='no_such_dir';
981: }
982: if ($ulsout eq '') { $ulsout='empty'; }
983: print $client "$ulsout\n";
984: # ------------------------------------------------------------- unknown command
985: } else {
986: # unknown command
987: print $client "unknown_cmd\n";
988: }
989: # ------------------------------------------------------ client unknown, refuse
990: }
991: } else {
992: print $client "refused\n";
993: &logthis("<font color=blue>WARNING: "
994: ."Rejected client $clientip, closing connection</font>");
995: }
996: &logthis("<font color=red>CRITICAL: "
997: ."Disconnect from $clientip ($hostid{$clientip})</font>");
998: # =============================================================================
999: }
1000:
1001: # tidy up gracefully and finish
1002:
1003: # this exit is VERY important, otherwise the child will become
1004: # a producer of more and more children, forking yourself into
1005: # process death.
1006: exit;
1007: }
1008: }
1009:
1010:
1011:
1012:
1013:
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