3 # This is the DX cluster 'daemon'. It sits in the middle of its little
4 # web of client routines sucking and blowing data where it may.
6 # Hence the name of 'spider' (although it may become 'dxspider')
8 # Copyright (c) 1998 Dirk Koopman G1TLH
15 # make sure that modules are searched in the order local then perl
19 # root of directory tree for this system
21 $root = $ENV{'DXSPIDER_ROOT'} if $ENV{'DXSPIDER_ROOT'};
23 unshift @INC, "$root/perl"; # this IS the right way round!
24 unshift @INC, "$root/local";
26 # try to create and lock a lockfile (this isn't atomic but
28 my $lockfn = "$root/perl/cluster.lock"; # lock file name
30 open(CLLOCK, "$lockfn") or die "Can't open Lockfile ($lockfn) $!";
33 die "Lockfile ($lockfn) and process $pid exist, another cluster running?" if kill 0, $pid;
36 open(CLLOCK, ">$lockfn") or die "Can't open Lockfile ($lockfn) $!";
70 use POSIX ":sys_wait_h";
77 #use vars qw(@inqueue $systime $version $starttime $lockfn @outstanding_connects $zombies $root
78 # $lang $myalias @debug $userfn $clusteraddr $clusterport $mycall $decease );
80 @inqueue = (); # the main input queue, an array of hashes
81 $systime = 0; # the time now (in seconds)
82 $version = "1.45"; # the version no of the software
83 $starttime = 0; # the starting time of the cluster
84 $lockfn = "cluster.lock"; # lock file name
85 @outstanding_connects = (); # list of outstanding connects
87 # handle disconnections
91 return if !defined $dxchan;
92 $dxchan->disconnect();
95 # send a message to call on conn and disconnect
98 my ($conn, $call, $mess) = @_;
100 dbg('chan', "-> D $call $mess\n");
101 $conn->send_now("D$call|$mess");
103 dbg('chan', "-> Z $call bye\n");
104 $conn->send_now("Z$call|bye"); # this will cause 'client' to disconnect
109 # handle incoming messages
112 my ($conn, $msg, $err) = @_;
113 my $dxchan = DXChannel->get_by_cnum($conn); # get the dxconnnect object for this message
115 if (!defined $msg || (defined $err && $err)) {
120 $dxchan->conn(undef);
129 # set up the basic channel info - this needs a bit more thought - there is duplication here
130 if (!defined $dxchan) {
131 my ($sort, $call, $line) = DXChannel::decode_input(0, $msg);
132 return unless defined $sort;
134 # is there one already connected to me - locally?
135 my $user = DXUser->get($call);
136 if (DXChannel->get($call)) {
137 my $mess = DXM::msg($lang, ($user && $user->is_node) ? 'concluster' : 'conother', $call);
138 already_conn($conn, $call, $mess);
142 # is there one already connected elsewhere in the cluster?
144 if (($user->is_node || $call eq $myalias) && !DXCluster->get_exact($call)) {
147 if (DXCluster->get_exact($call)) {
148 my $mess = DXM::msg($lang, $user->is_node ? 'concluster' : 'conother', $call);
149 already_conn($conn, $call, $mess);
153 $user->{lang} = $main::lang if !$user->{lang}; # to autoupdate old systems
155 if (DXCluster->get_exact($call)) {
156 my $mess = DXM::msg($lang, 'conother', $call);
157 already_conn($conn, $call, $mess);
160 $user = DXUser->new($call);
164 if ($user->lockout) {
165 Log('DXCommand', "$call is locked out, disconnected");
166 $conn->send_now("Z$call|bye"); # this will cause 'client' to disconnect
171 $dxchan = DXCommandmode->new($call, $conn, $user) if $user->is_user;
172 $dxchan = DXProt->new($call, $conn, $user) if $user->is_node;
173 $dxchan = BBS->new($call, $conn, $user) if $user->is_bbs;
174 die "Invalid sort of user on $call = $sort" if !$dxchan;
177 # queue the message and the channel object for later processing
179 my $self = bless {}, "inqueue";
180 $self->{dxchan} = $dxchan;
181 $self->{data} = $msg;
182 push @inqueue, $self;
191 # cease running this program, close down all the connections nicely
196 $SIG{'TERM'} = 'IGNORE';
197 $SIG{'INT'} = 'IGNORE';
202 Local::finish(); # end local processing
204 dbg('local', "Local::finish error $@") if $@;
207 foreach $dxchan (DXChannel->get_all()) {
208 next unless $dxchan->is_node;
209 disconnect($dxchan) unless $dxchan == $DXProt::me;
211 Msg->event_loop(1, 0.05);
212 Msg->event_loop(1, 0.05);
213 Msg->event_loop(1, 0.05);
214 Msg->event_loop(1, 0.05);
215 Msg->event_loop(1, 0.05);
216 Msg->event_loop(1, 0.05);
219 foreach $dxchan (DXChannel->get_all()) {
220 next if $dxchan->is_node;
221 disconnect($dxchan) unless $dxchan == $DXProt::me;
223 Msg->event_loop(1, 0.05);
224 Msg->event_loop(1, 0.05);
225 Msg->event_loop(1, 0.05);
226 Msg->event_loop(1, 0.05);
227 Msg->event_loop(1, 0.05);
228 Msg->event_loop(1, 0.05);
232 # close all databases
235 dbg('chan', "DXSpider version $version ended");
236 Log('cluster', "DXSpider V$version stopped");
240 # $SIG{__WARN__} = $SIG{__DIE__} = sub {my $a = shift; cluck($a); };
244 # the reaper of children
248 while (($cpid = waitpid(-1, WNOHANG)) > 0) {
249 dbg('reap', "cpid: $cpid");
250 @outstanding_connects = grep {$_->{pid} != $cpid} @outstanding_connects;
251 $zombies-- if $zombies > 0;
253 dbg('reap', "cpid: $cpid");
256 # this is where the input queue is dealt with and things are dispatched off to other parts of
260 my $self = shift @inqueue;
263 my $data = $self->{data};
264 my $dxchan = $self->{dxchan};
266 my ($sort, $call, $line) = DXChannel::decode_input($dxchan, $data);
267 return unless defined $sort;
269 # do the really sexy console interface bit! (Who is going to do the TK interface then?)
270 dbg('chan', "<- $sort $call $line\n") unless $sort eq 'D';
273 my $user = $dxchan->user;
274 if ($sort eq 'A' || $sort eq 'O') {
275 $dxchan->start($line, $sort);
276 } elsif ($sort eq 'I') {
277 die "\$user not defined for $call" if !defined $user;
279 $dxchan->normal($line);
280 disconnect($dxchan) if ($dxchan->{state} eq 'bye');
281 } elsif ($sort eq 'Z') {
282 $dxchan->conn(undef);
284 } elsif ($sort eq 'D') {
285 ; # ignored (an echo)
287 print STDERR atime, " Unknown command letter ($sort) received from $call\n";
293 my $t = $systime - $starttime;
294 my $days = int $t / 86400;
296 my $hours = int $t / 3600;
298 my $mins = int $t / 60;
299 return sprintf "%d %02d:%02d", $days, $hours, $mins;
301 #############################################################
303 # The start of the main line of code
305 #############################################################
307 $starttime = $systime = time;
308 $lang = 'en' unless $lang;
310 # open the debug file, set various FHs to be unbuffered
315 STDOUT->autoflush(1);
317 Log('cluster', "DXSpider V$version started");
320 dbg('err', "DXSpider DX Cluster Version $version", "Copyright (c) 1998-2000 Dirk Koopman G1TLH");
323 dbg('err', "loading prefixes ...");
327 dbg('err', "loading band data ...");
330 # initialise User file system
331 dbg('err', "loading user file system ...");
332 DXUser->init($userfn, 1);
334 # start listening for incoming messages/connects
335 dbg('err', "starting listener ...");
336 Msg->new_server("$clusteraddr", $clusterport, \&login);
339 dbg('err', "load badwords: " . (BadWords::load or "Ok"));
343 $SIG{TERM} = \&cease;
344 $SIG{HUP} = 'IGNORE';
345 $SIG{CHLD} = sub { $zombies++ };
347 $SIG{PIPE} = sub { dbg('err', "Broken PIPE signal received"); };
348 $SIG{IO} = sub { dbg('err', "SIGIO received"); };
349 $SIG{WINCH} = $SIG{STOP} = $SIG{CONT} = 'IGNORE';
350 $SIG{KILL} = 'DEFAULT'; # as if it matters....
352 # catch the rest with a hopeful message
355 # dbg('chan', "Catching SIG $_");
356 $SIG{$_} = sub { my $sig = shift; DXDebug::confess("Caught signal $sig"); };
363 # read in system messages
366 # read in command aliases
369 # initialise the Geomagnetic data engine
373 # initial the Spot stuff
376 # initialise the protocol engine
377 dbg('err', "reading in duplicate spot and WWV info ...");
380 # put in a DXCluster node for us here so we can add users and take them away
381 DXNode->new($DXProt::me, $mycall, 0, 1, $DXProt::myprot_version);
383 # read in any existing message headers and clean out old crap
384 dbg('err', "reading existing message headers ...");
388 # read in any cron jobs
389 dbg('err', "reading cron jobs ...");
392 # read in database descriptors
393 dbg('err', "reading database descriptors ...");
396 # starting local stuff
397 dbg('err', "doing local initialisation ...");
401 dbg('local', "Local::init error $@") if $@;
403 # print various flags
404 #dbg('err', "seful info - \$^D: $^D \$^W: $^W \$^S: $^S \$^P: $^P");
406 # this, such as it is, is the main loop!
407 dbg('err', "orft we jolly well go ...");
409 #open(DB::OUT, "|tee /tmp/aa");
414 Msg->event_loop(1, 0.1);
416 process_inqueue(); # read in lines from the input queue and despatch them
419 # do timed stuff, ongoing processing happens one a second
420 if ($timenow != $systime) {
423 DXCron::process(); # do cron jobs
424 DXCommandmode::process(); # process ongoing command mode stuff
425 DXProt::process(); # process ongoing ak1a pcxx stuff
426 DXConnect::process();
433 Local::process(); # do any localised processing
435 dbg('local', "Local::process error $@") if $@;
438 last if --$decease <= 0;