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)
18 use Mojo::IOLoop::Stream;
23 use vars qw($now %conns $noconns $cnum $total_in $total_out $total_lines_in $total_lines_out $connect_timeout $disc_waittime);
25 $total_in = $total_out = 0;
26 $total_lines_in = $total_lines_out = 0;
37 #-----------------------------------------------------------------
38 # Generalised initializer
42 my ($pkg, $rproc) = @_;
44 my $class = $obj || $pkg;
55 cnum => (($cnum < 999) ? (++$cnum) : ($cnum = 1)),
64 dbg("$class Connection created (total $noconns)") if isdbg('connll');
65 return bless $conn, $class;
72 $conn->{sock}->on(error => sub {$callback->($_[1]);});
79 $conn->{sock}->on(close => sub {$callback->()});
86 $conn->{rproc} = $callback;
97 $call = $pkg->{call} unless $call;
98 return undef unless $call;
99 dbg((ref $pkg) . " changing $pkg->{call} to $call") if isdbg('connll') && exists $pkg->{call} && $call ne $pkg->{call};
100 delete $conns{$pkg->{call}} if exists $pkg->{call} && exists $conns{$pkg->{call}} && $pkg->{call} ne $call;
101 $pkg->{call} = $call;
102 $ref = $conns{$call} = $pkg;
103 dbg((ref $pkg) . " Connection $pkg->{cnum} $call stored") if isdbg('connll');
105 $ref = $conns{$call};
110 # this is only called by any dependent processes going away unexpectedly
113 my ($pkg, $pid) = @_;
115 my @pid = grep {$_->{pid} == $pid} values %conns;
116 foreach my $p (@pid) {
117 &{$p->{eproc}}($p, "$pid has gorn") if exists $p->{eproc};
125 return $conn->{csort} eq 'ax25';
131 unless ($conn->{peerhost}) {
132 $conn->{peerhost} ||= 'ax25' if $conn->ax25;
133 $conn->{peerhost} ||= $conn->{sock}->handle->peerhost if $conn->{sock};
134 $conn->{peerhost} ||= 'UNKNOWN';
136 $conn->{peerhost} =~ s/^::ffff://;
137 return $conn->{peerhost};
140 #-----------------------------------------------------------------
148 my $sock = $conn->{sock} = Mojo::IOLoop::Stream->new($handle);
149 $sock->on(read => sub {$conn->_rcv($_[1]);} );
150 $sock->on(error => sub {delete $conn->{sock}; $conn->disconnect;});
151 $sock->on(close => sub {delete $conn->{sock}; $conn->disconnect;});
154 $conn->{peerhost} = eval { $handle->peerhost; };
155 dbg((ref $conn) . " connected $conn->{cnum} to $conn->{peerhost}:$conn->{peerport}") if isdbg('conn') || isdbg ('connect');
156 if ($conn->{on_connect}) {
157 &{$conn->{on_connect}}($conn, $handle);
164 my $sock = $conn->{sock};
165 return ref $sock && $sock->isa('Mojo::IOLoop::Stream');
169 my ($pkg, $to_host, $to_port, %args) = @_;
170 my $timeout = delete $args{timeout} || $connect_timeout;
172 # Create a connection end-point object
175 my $rproc = delete $args{rproc};
176 $conn = $pkg->new($rproc);
178 $conn->{peerhost} = $to_host;
179 $conn->{peerport} = $to_port;
180 $conn->{sort} = 'Outgoing';
182 dbg((ref $conn) . " connecting $conn->{cnum} to $to_host:$to_port") if isdbg('connll');
185 $conn->{sock} = $sock = Mojo::IOLoop::Client->new;
186 $sock->on(connect => sub {
187 $conn->_on_connect($_[1])
189 $sock->on(error => sub {
190 &{$conn->{eproc}}($conn, $_[1]) if exists $conn->{eproc};
191 delete $conn->{sock};
194 $sock->on(close => sub {
195 delete $conn->{sock};
199 # copy any args like on_connect, on_disconnect etc
200 while (my ($k, $v) = each %args) {
204 $sock->connect(address => $to_host, port => $to_port, timeout => $timeout);
211 my ($conn, $line, $sort) = @_;
214 # local $^F = 10000; # make sure it ain't closed on exec
215 # my ($a, $b) = $io_socket->socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC);
220 # if (defined $pid) {
223 # $conn->{sock} = $a;
224 # $conn->{csort} = $sort;
225 # $conn->{lineend} = "\cM" if $sort eq 'ax25';
226 # $conn->{pid} = $pid;
227 # if ($conn->{rproc}) {
228 # my $callback = sub {$conn->_rcv};
229 # Msg::set_event_handler ($a, read => $callback);
231 # dbg("connect $conn->{cnum}: started pid: $conn->{pid} as $line") if isdbg('connect');
238 # *STDIN = IO::File->new_from_fd($b, 'r') or die;
239 # *STDOUT = IO::File->new_from_fd($b, 'w') or die;
240 # *STDERR = IO::File->new_from_fd($b, 'w') or die;
242 # unless ($main::is_win) {
243 # # $SIG{HUP} = 'IGNORE';
244 # $SIG{HUP} = $SIG{CHLD} = $SIG{TERM} = $SIG{INT} = 'DEFAULT';
247 # exec "$line" or dbg("exec '$line' failed $!");
250 # dbg("cannot fork for $line");
253 # dbg("no socket pair $! for $line");
261 my $count = $conn->{disconnecting}++;
262 my $dbg = isdbg('connll');
263 my ($pkg, $fn, $line) = caller if $dbg;
266 dbgtrace((ref $conn) . "::disconnect on call $conn->{call} attempt $conn->{disconnecting} called from ${pkg}::${fn} line $line FORCING CLOSE ") if $dbg;
270 dbg((ref $conn) . "::disconnect on call $conn->{call} attempt $conn->{disconnecting} called from ${pkg}::${fn} line $line ") if $dbg;
273 # remove this conn from the active queue
274 # be careful to delete the correct one
276 if ($call = $conn->{call}) {
277 my $ref = $conns{$call};
278 delete $conns{$call} if $ref && $ref == $conn;
280 $call ||= 'unallocated';
282 $delqueue{$conn} = $conn; # save this connection until everything is finished
283 my $sock = $conn->{sock};
285 if ($sock->{buffer}) {
286 my $lth = length $sock->{buffer};
287 Mojo::IOLoop->timer($disc_waittime, sub {
288 dbg("Buffer contained $lth characters, coordinated for $disc_waittime secs, now disconnecting $call") if $dbg;
292 dbg("Buffer empty, just close $call") if $dbg;
297 dbg((ref $conn) . " socket missing on $conn->{call}") if $dbg;
305 my $sock = delete $conn->{sock};
306 $conn->{state} = 'E';
307 $conn->{timeout}->del if $conn->{timeout};
309 my $call = $conn->{call};
311 if (isdbg('connll')) {
312 my ($pkg, $fn, $line) = caller;
313 dbg((ref $conn) . "::_close_it on call $conn->{call} attempt $conn->{disconnecting} called from ${pkg}::${fn} line $line ");
317 dbg((ref $conn) . " Connection $conn->{cnum} $call starting to close") if isdbg('connll');
319 if ($conn->{on_disconnect}) {
320 &{$conn->{on_disconnect}}($conn);
324 dbg((ref $conn) . " Connection $conn->{cnum} $call closing gracefully") if isdbg('connll');
325 $sock->close_gracefully if $sock->can('close_gracefully');
328 # get rid of any references
330 if (ref($conn->{$_})) {
335 delete $delqueue{$conn}; # finally remove the $conn
337 unless ($main::is_win) {
338 kill 'TERM', $conn->{pid} if exists $conn->{pid};
345 my $rq = $conn->{outqueue};
346 my $sock = $conn->{sock};
347 return unless defined $sock;
348 return if $conn->{disconnecting};
351 my $data = shift @$rq;
352 my $lth = length $data;
353 my $call = $conn->{call} || 'none';
355 dbgdump('raw', "$call send $lth:", $data);
360 $conn->{dataout} += $lth;
364 dbg("_send_stuff $call ending data ignored: $data");
370 my ($conn, $msg) = @_;
371 $conn->enqueue($msg);
381 my ($conn, $msg) = @_;
382 push @{$conn->{outqueue}}, $msg;
388 push @{$conn->{outqueue}}, defined $_[0] ? $_[0] : '';
399 $conn->{sock}->on(drain => sub {$conn->disconnect;});
402 #-----------------------------------------------------------------
403 # Receive side routines
407 # @_ == 4 || die "Msg->new_server (myhost, myport, login_proc)\n";
408 my ($pkg, $my_host, $my_port, $login_proc) = @_;
409 my $conn = $pkg->new($login_proc);
411 my $sock = $conn->{sock} = Mojo::IOLoop::Server->new;
412 $sock->on(accept=>sub{$conn->new_client($_[1]);});
413 $sock->listen(address=>$my_host, port=>$my_port);
416 die "Could not create socket: $! \n" unless $conn->{sock};
429 return if $conn->{disconnecting};
431 if ($conn->{msg} =~ /\cJ/) {
432 my @lines = split /\cM?\cJ/, $conn->{msg};
433 if ($conn->{msg} =~ /\cM?\cJ$/) {
436 $conn->{msg} = pop @lines;
438 $conn->{linesin} += @lines;
439 $total_lines_in += @lines;
441 last if $conn->{disconnecting};
442 &{$conn->{rproc}}($conn, defined $_ ? $_ : '');
447 sub _rcv { # Complement to _send
448 my $conn = shift; # $rcv_now complement of $flush
450 my $sock = $conn->{sock};
451 return unless defined($sock);
452 return if $conn->{disconnecting};
454 $total_in += length $msg;
455 $conn->{datain} += length $msg;
458 my $call = $conn->{call} || 'none';
459 my $lth = length $msg;
460 dbgdump('raw', "$call read $lth: ", $msg);
463 my @ch = split //, $msg;
468 $conn->{msg} =~ s/.$//;
475 $conn->send_raw($out);
478 $conn->{msg} .= $msg;
481 unless ($conn->{disable_read}) {
482 $conn->dequeue if exists $conn->{msg};
487 my $server_conn = shift;
490 my $conn = $server_conn->new($server_conn->{rproc});
491 my $sock = $conn->{sock} = Mojo::IOLoop::Stream->new($handle);
492 $sock->on(read => sub {$conn->_rcv($_[1])});
495 $conn->{peerhost} = $handle->peerhost || 'unknown';
496 $conn->{peerhost} =~ s|^::ffff:||; # chop off leading pseudo IPV6 stuff on dual stack listeners
497 $conn->{peerport} = $handle->peerport || 0;
498 dbg((ref $conn) . " accept $conn->{cnum} from $conn->{peerhost}:$conn->{peerport}") if isdbg('conn') || isdbg('connect');
499 my ($rproc, $eproc) = &{$server_conn->{rproc}} ($conn, $conn->{peerhost}, $conn->{peerport});
500 $conn->{sort} = 'Incoming';
502 $conn->{eproc} = $eproc;
505 $conn->{rproc} = $rproc;
506 } else { # Login failed
507 &{$conn->{eproc}}($conn, undef) if exists $conn->{eproc};
516 delete $conn->{sock};
519 # close all clients (this is for forking really)
520 sub close_all_clients
522 foreach my $conn (values %conns) {
530 return defined $_[0] ? $conn->{disable_read} = $_[0] : $_[0];
535 #----------------------------------------------------
536 # Event loop routines used by both client and server
538 sub set_event_handler {
541 my ($pkg, $fn, $line) = caller;
543 foreach (my ($k,$v) = each %args) {
547 dbg("Msg::set_event_handler called from ${pkg}::${fn} line $line doing $s");
552 my ($pkg, $interval) = @_;
554 while (time - $now < $interval) {
562 my $call = $conn->{call} || 'unallocated';
564 if (isdbg('connll')) {
565 my ($pkg, $fn, $line) = caller;
566 dbgtrace((ref $conn) . "::DESTROY on call $call called from ${pkg}::${fn} line $line ");
569 my $call = $conn->{call} || 'unallocated';
570 my $host = $conn->{peerhost} || '';
571 my $port = $conn->{peerport} || '';
572 my $sock = $conn->{sock};
575 $sock->close_gracefully if $sock->can('close_gracefully');
576 delete $conn->{sock};
580 dbg((ref $conn) . " Connection $conn->{cnum} $call [$host $port] being destroyed (total $noconns)") if isdbg('connll');