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";
42 @inqueue = (); # the main input queue, an array of hashes
43 $systime = 0; # the time now (in seconds)
44 $version = 1.1; # the version no of the software
46 # handle disconnections
50 return if !defined $dxchan;
51 $dxchan->disconnect();
54 # handle incoming messages
57 my ($conn, $msg, $err) = @_;
58 my $dxchan = DXChannel->get_by_cnum($conn); # get the dxconnnect object for this message
60 if (defined $err && $err) {
61 disconnect($dxchan) if defined $dxchan;
65 # set up the basic channel info - this needs a bit more thought - there is duplication here
66 if (!defined $dxchan) {
67 my ($sort, $call, $line) = $msg =~ /^(\w)(\S+)\|(.*)$/;
69 # is there one already connected?
70 if (DXChannel->get($call)) {
71 my $mess = DXM::msg('conother', $call);
72 dbg('chan', "-> D $call $mess\n");
73 $conn->send_now("D$call|$mess");
75 dbg('chan', "-> Z $call bye\n");
76 $conn->send_now("Z$call|bye"); # this will cause 'client' to disconnect
80 # is there one already connected elsewhere in the cluster?
81 if (DXCluster->get($call)) {
82 my $mess = DXM::msg('concluster', $call);
83 dbg('chan', "-> D $call $mess\n");
84 $conn->send_now("D$call|$mess");
86 dbg('chan', "-> Z $call bye\n");
87 $conn->send_now("Z$call|bye"); # this will cause 'client' to disconnect
91 my $user = DXUser->get($call);
93 $user = DXUser->new($call);
97 $dxchan = DXCommandmode->new($call, $conn, $user) if ($user->sort eq 'U');
98 $dxchan = DXProt->new($call, $conn, $user) if ($user->sort eq 'A');
99 die "Invalid sort of user on $call = $sort" if !$dxchan;
102 # queue the message and the channel object for later processing
104 my $self = bless {}, "inqueue";
105 $self->{dxchan} = $dxchan;
106 $self->{data} = $msg;
107 push @inqueue, $self;
116 # cease running this program, close down all the connections nicely
120 foreach $dxchan (DXChannel->get_all()) {
126 # this is where the input queue is dealt with and things are dispatched off to other parts of
130 my $self = shift @inqueue;
133 my $data = $self->{data};
134 my $dxchan = $self->{dxchan};
135 my ($sort, $call, $line) = $data =~ /^(\w)(\S+)\|(.*)$/;
137 # do the really sexy console interface bit! (Who is going to do the TK interface then?)
138 dbg('chan', "<- $sort $call $line\n");
141 my $user = $dxchan->user;
143 $dxchan->start($line);
144 } elsif ($sort eq 'D') {
145 die "\$user not defined for $call" if !defined $user;
148 $dxchan->normal($line);
150 disconnect($dxchan) if ($dxchan->{state} eq 'bye');
151 } elsif ($sort eq 'Z') {
154 print STDERR atime, " Unknown command letter ($sort) received from $call\n";
158 #############################################################
160 # The start of the main line of code
162 #############################################################
164 # open the debug file, set various FHs to be unbuffered
169 STDOUT->autoflush(1);
172 print "DXSpider DX Cluster Version $version\nCopyright (c) 1998 Dirk Koopman G1TLH\n";
175 print "loading prefixes ...\n";
179 print "loading band data ...\n";
182 # initialise User file system
183 print "loading user file system ...\n";
184 DXUser->init($userfn);
186 # start listening for incoming messages/connects
187 print "starting listener ...\n";
188 Msg->new_server("$clusteraddr", $clusterport, \&login);
191 $SIG{'INT'} = \&cease;
192 $SIG{'TERM'} = \&cease;
193 $SIG{'HUP'} = 'IGNORE';
195 # initialise the protocol engine
198 # put in a DXCluster node for us here so we can add users and take them away
199 DXNode->new(0, $mycall, 0, 1, $DXProt::myprot_version);
201 # read in any existing message headers
202 print "reading existing message headers\n";
205 # read in any cron jobs
206 print "reading cron jobs\n";
209 # this, such as it is, is the main loop!
210 print "orft we jolly well go ...\n";
213 Msg->event_loop(1, 0.001);
215 process_inqueue(); # read in lines from the input queue and despatch them
217 # do timed stuff, ongoing processing happens one a second
218 if ($timenow != $systime) {
222 DXCommandmode::process(); # process ongoing command mode stuff
223 DXProt::process(); # process ongoing ak1a pcxx stuff
225 DXConnect::process();