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
13 # make sure that modules are searched in the order local then perl
15 # root of directory tree for this system
17 $root = $ENV{'DXSPIDER_ROOT'} if $ENV{'DXSPIDER_ROOT'};
19 unshift @INC, '$root/perl'; # this IS the right way round!
20 unshift @INC, '$root/local';
38 @inqueue = (); # the main input queue, an array of hashes
39 $systime = 0; # the time now (in seconds)
40 $version = 1.1; # the version no of the software
42 # handle disconnections
46 return if !defined $dxchan;
47 $dxchan->disconnect();
50 # handle incoming messages
53 my ($conn, $msg, $err) = @_;
54 my $dxchan = DXChannel->get_by_cnum($conn); # get the dxconnnect object for this message
56 if (defined $err && $err) {
57 disconnect($dxchan) if defined $dxchan;
61 # set up the basic channel info - this needs a bit more thought - there is duplication here
62 if (!defined $dxchan) {
63 my ($sort, $call, $line) = $msg =~ /^(\w)(\S+)\|(.*)$/;
65 # is there one already connected?
66 if (DXChannel->get($call)) {
67 my $mess = DXM::msg('conother', $call);
68 dbg('chan', "-> D $call $mess\n");
69 $conn->send_now("D$call|$mess");
71 dbg('chan', "-> Z $call bye\n");
72 $conn->send_now("Z$call|bye"); # this will cause 'client' to disconnect
76 # is there one already connected elsewhere in the cluster?
77 if (DXCluster->get($call)) {
78 my $mess = DXM::msg('concluster', $call);
79 dbg('chan', "-> D $call $mess\n");
80 $conn->send_now("D$call|$mess");
82 dbg('chan', "-> Z $call bye\n");
83 $conn->send_now("Z$call|bye"); # this will cause 'client' to disconnect
87 my $user = DXUser->get($call);
89 $user = DXUser->new($call);
93 $dxchan = DXCommandmode->new($call, $conn, $user) if ($user->sort eq 'U');
94 $dxchan = DXProt->new($call, $conn, $user) if ($user->sort eq 'A');
95 die "Invalid sort of user on $call = $sort" if !$dxchan;
98 # queue the message and the channel object for later processing
100 my $self = bless {}, "inqueue";
101 $self->{dxchan} = $dxchan;
102 $self->{data} = $msg;
103 push @inqueue, $self;
112 # cease running this program, close down all the connections nicely
116 foreach $dxchan (DXChannel->get_all()) {
122 # this is where the input queue is dealt with and things are dispatched off to other parts of
126 my $self = shift @inqueue;
129 my $data = $self->{data};
130 my $dxchan = $self->{dxchan};
131 my ($sort, $call, $line) = $data =~ /^(\w)(\S+)\|(.*)$/;
133 # do the really sexy console interface bit! (Who is going to do the TK interface then?)
134 dbg('chan', "<- $sort $call $line\n");
137 my $user = $dxchan->user;
139 $dxchan->start($line);
140 } elsif ($sort eq 'D') {
141 die "\$user not defined for $call" if !defined $user;
142 $dxchan->normal($line);
143 disconnect($dxchan) if ($dxchan->{state} eq 'bye');
144 } elsif ($sort eq 'Z') {
147 print STDERR atime, " Unknown command letter ($sort) received from $call\n";
151 #############################################################
153 # The start of the main line of code
155 #############################################################
157 # open the debug file, set various FHs to be unbuffered
162 STDOUT->autoflush(1);
165 print "loading prefixes ...\n";
169 print "loading band data ...\n";
172 # initialise User file system
173 print "loading user file system ...\n";
174 DXUser->init($userfn);
176 # start listening for incoming messages/connects
177 print "starting listener ...\n";
178 Msg->new_server("$clusteraddr", $clusterport, \&login);
181 $SIG{'INT'} = \&cease;
182 $SIG{'TERM'} = \&cease;
183 $SIG{'HUP'} = 'IGNORE';
185 # initialise the protocol engine
188 # put in a DXCluster node for us here so we can add users and take them away
189 DXNode->new(0, $mycall, 0, 1, $DXProt::myprot_version);
191 # this, such as it is, is the main loop!
192 print "orft we jolly well go ...\n";
195 Msg->event_loop(1, 0.001);
197 process_inqueue(); # read in lines from the input queue and despatch them
199 # do timed stuff, ongoing processing happens one a second
200 if ($timenow != $systime) {
204 DXCommandmode::process(); # process ongoing command mode stuff
205 DXProt::process(); # process ongoing ak1a pcxx stuff