2 # This has been taken from the 'Advanced Perl Programming' book by Sriram Srinivasan
4 # I am presuming that the code is distributed on the same basis as perl itself.
6 # I have modified it to suit my devious purposes (Dirk Koopman G1TLH)
24 use vars qw(%conns $noconns $cnum $total_in $total_out);
26 $total_in = $total_out = 0;
30 #-----------------------------------------------------------------
31 # Generalised initializer
35 my ($pkg, $rproc) = @_;
37 my $class = $obj || $pkg;
48 cnum => (($cnum < 999) ? (++$cnum) : ($cnum = 1)),
53 dbg("Connection created ($noconns)") if isdbg('connll');
54 return bless $conn, $class;
61 $conn->{eproc} = $callback;
68 $conn->{sock}->on_eof($callback);
69 $conn->{sock}->on_error($callback);
76 $conn->{rproc} = $callback;
87 $call = $pkg->{call} unless $call;
88 return undef unless $call;
89 dbg("changing $pkg->{call} to $call") if isdbg('connll') && exists $pkg->{call} && $call ne $pkg->{call};
90 delete $conns{$pkg->{call}} if exists $pkg->{call} && exists $conns{$pkg->{call}} && $pkg->{call} ne $call;
92 $ref = $conns{$call} = $pkg;
93 dbg("Connection $pkg->{cnum} $call stored") if isdbg('connll');
100 # this is only called by any dependent processes going away unexpectedly
103 my ($pkg, $pid) = @_;
105 my @pid = grep {$_->{pid} == $pid} values %conns;
106 foreach my $p (@pid) {
107 &{$p->{eproc}}($p, "$pid has gorn") if exists $p->{eproc};
115 return $conn->{csort} eq 'ax25';
121 $conn->{peerhost} ||= 'ax25' if $conn->ax25;
122 $conn->{peerhost} ||= $conn->{sock}->peerhost if $conn->{sock} && $conn->{sock}->isa('IO::Socket::INET');
123 $conn->{peerhost} ||= 'UNKNOWN';
124 return $conn->{peerhost};
127 #-----------------------------------------------------------------
130 my ($pkg, $to_host, $to_port, $rproc) = @_;
132 # Create a connection end-point object
135 $conn = $pkg->new($rproc);
137 $conn->{peerhost} = $to_host;
138 $conn->{peerport} = $to_port;
139 $conn->{sort} = 'Outgoing';
141 my $sock = AnyEvent::Handle->new(
143 connect => [$to_host, $to_port],
145 on_connect => sub {my $h = shift; $conn->{peerhost} = shift;},
147 on_eof => sub {$conn->disconnect},
149 on_error => sub {$conn->disconnect},
156 $conn->{sock} = $sock;
157 $sock->on_read(sub{$conn->_rcv});
164 my ($conn, $line, $sort) = @_;
167 # local $^F = 10000; # make sure it ain't closed on exec
168 # my ($a, $b) = $io_socket->socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC);
173 # if (defined $pid) {
176 # $conn->{sock} = $a;
177 # $conn->{csort} = $sort;
178 # $conn->{lineend} = "\cM" if $sort eq 'ax25';
179 # $conn->{pid} = $pid;
180 # if ($conn->{rproc}) {
181 # my $callback = sub {$conn->_rcv};
182 # Msg::set_event_handler ($a, read => $callback);
184 # dbg("connect $conn->{cnum}: started pid: $conn->{pid} as $line") if isdbg('connect');
191 # *STDIN = IO::File->new_from_fd($b, 'r') or die;
192 # *STDOUT = IO::File->new_from_fd($b, 'w') or die;
193 # *STDERR = IO::File->new_from_fd($b, 'w') or die;
195 # unless ($main::is_win) {
196 # # $SIG{HUP} = 'IGNORE';
197 # $SIG{HUP} = $SIG{CHLD} = $SIG{TERM} = $SIG{INT} = 'DEFAULT';
200 # exec "$line" or dbg("exec '$line' failed $!");
203 # dbg("cannot fork for $line");
206 # dbg("no socket pair $! for $line");
214 return if exists $conn->{disconnecting};
216 $conn->{disconnecting} = 1;
217 my $sock = delete $conn->{sock};
218 $conn->{state} = 'E';
219 $conn->{timeout}->del if $conn->{timeout};
221 # be careful to delete the correct one
223 if ($call = $conn->{call}) {
224 my $ref = $conns{$call};
225 delete $conns{$call} if $ref && $ref == $conn;
227 $call ||= 'unallocated';
228 dbg("Connection $conn->{cnum} $call disconnected") if isdbg('connll');
230 # get rid of any references
232 if (ref($conn->{$_})) {
237 if (defined($sock)) {
238 shutdown($sock->{fh}, 2);
242 unless ($main::is_win) {
243 kill 'TERM', $conn->{pid} if exists $conn->{pid};
250 my $rq = $conn->{outqueue};
251 my $sock = $conn->{sock};
254 my $data = shift @$rq;
255 my $lth = length $data;
256 my $call = $conn->{call} || 'none';
259 dbgdump('raw', "$call send $lth: ", $lth);
262 if (defined $sock && !$sock->destroyed) {
263 $sock->push_write($data);
266 dbg("_send_stuff $call ending data ignored: $data");
272 my ($conn, $msg) = @_;
273 my $rq = $conn->{outqueue};
274 my $sock = $conn->{sock};
276 # this is done like this because enqueueing may be going on independently of
277 # sending (whether later or now)
278 $conn->enqueue($msg);
282 sub send_now { goto &send_later; }
286 my ($conn, $msg) = @_;
287 push @{$conn->{outqueue}}, $msg;
293 push (@{$conn->{outqueue}}, defined $_[0] ? $_[0] : '');
296 sub _err_will_block {
303 $conn->{sock}->on_drain(sub {$conn->disconnect;});
306 #-----------------------------------------------------------------
307 # Receive side routines
310 @_ == 4 || die "Msg->new_server (myhost, myport, login_proc\n";
311 my ($pkg, $my_host, $my_port, $login_proc) = @_;
312 my $self = $pkg->new($login_proc);
314 $self->{sock} = tcp_server $my_host, $my_port, sub { $self->new_client(@_); }, sub { return 256; };
315 die "Could not create socket: $! \n" unless $self->{sock};
323 my $sock = $conn->{sock};
325 # $sock->keepalive(1);
332 if ($conn->{msg} =~ /\n/) {
333 my @lines = split /\r?\n/, $conn->{msg};
334 if ($conn->{msg} =~ /\n$/) {
337 $conn->{msg} = pop @lines;
340 &{$conn->{rproc}}($conn, defined $_ ? $_ : '');
345 sub _rcv { # Complement to _send
346 my $conn = shift; # $rcv_now complement of $flush
347 # Find out how much has already been received, if at all
348 my ($msg, $offset, $bytes_to_read, $bytes_read);
349 my $sock = $conn->{sock};
350 return unless defined($sock);
353 $msg = $sock->{rbuf};
354 $bytes_read = length $msg || 0;
357 if ($bytes_read > 0) {
358 $total_in += $bytes_read;
360 my $call = $conn->{call} || 'none';
361 dbgdump('raw', "$call read $bytes_read: ", $msg);
364 my @ch = split //, $msg;
369 $conn->{msg} =~ s/.$//;
376 $conn->send_now($out);
379 $conn->{msg} .= $msg;
383 unless ($conn->{disable_read}) {
384 $conn->dequeue if exists $conn->{msg};
389 my $server_conn = shift;
391 my $peerhost = shift;
392 my $peerport = shift;
394 my $conn = $server_conn->new($server_conn->{rproc});
395 $conn->{sock} = AnyEvent::Handle->new(
399 on_eof => sub {$conn->disconnect},
401 on_error => sub {$conn->disconnect},
407 $conn->{blocking} = 0;
408 my ($rproc, $eproc) = &{$server_conn->{rproc}} ($conn, $conn->{peerhost} = $peerhost, $conn->{peerport} = $peerport);
409 dbg("accept $conn->{cnum} from $conn->{peerhost} $conn->{peerport}") if isdbg('connll');
410 $conn->{sort} = 'Incoming';
412 $conn->{eproc} = $eproc;
415 $conn->{rproc} = $rproc;
416 $conn->{sock}->on_read(sub {$conn->_rcv});
417 } else { # Login failed
418 &{$conn->{eproc}}($conn, undef) if exists $conn->{eproc};
422 dbg("Msg: error on accept ($!)") if isdbg('err');
432 # close all clients (this is for forking really)
433 sub close_all_clients
435 foreach my $conn (values %conns) {
443 return defined $_[0] ? $conn->{disable_read} = $_[0] : $_[0];
448 my ($pkg, $interval) = @_;
449 my $cv = AnyEvent->condvar;
450 my $wait_a_bit = AnyEvent->timer(
452 cb => sub {$cv->send},
457 sub set_event_handler
461 my ($pkg, $fn, $line) = caller;
463 foreach (my ($k,$v) = each %args) {
467 dbg("Msg::set_event_handler called from ${pkg}::${fn} line $line doing $s");
473 return defined $_[0] ? $conn->{echo} = $_[0] : $_[0];
479 my $call = $conn->{call} || 'unallocated';
480 my $host = $conn->{peerhost} || '';
481 my $port = $conn->{peerport} || '';
482 dbg("Connection $conn->{cnum} $call [$host $port] being destroyed") if isdbg('connll');