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#! perl # mandatory |
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|
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# this listens for new tcp connections and hands them over to the server core |
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# whether this being an extension introduces or reduces stability problems |
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# is unknown as of today. |
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|
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use Socket; |
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use AnyEvent::Socket; |
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|
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CONF BIND_ADDRESSES = [[undef, 13327]]; |
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|
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our $MAX_DETECT; # how many bytes to read to identify the protocol |
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|
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our @LISTENERS; |
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our @DETECTORS; |
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our %DETECTORS; |
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|
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sub _update_detectors { |
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$MAX_DETECT = List::Util::max map $_->[1], values %DETECTORS; |
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} |
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|
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sub register($$$$) { |
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my ($name, $max_detect, $detect, $serve) = @_; |
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|
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$DETECTORS{$name} = [$max_detect, $detect, $serve, $name]; |
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_update_detectors; |
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|
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Guard::guard { |
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delete $DETECTORS{$name}; |
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_update_detectors if defined &_update_detectors; |
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} |
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} |
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|
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our $deliantra_detector = ext::tcp::register deliantra => 10, sub { |
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/^..version /s |
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}, sub { |
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my $ns = cf::client::create fileno $_[1], $_[0]; |
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$ns->run; |
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$ns->inbuf_append ($_[2]); |
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}; |
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|
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for (@$BIND_ADDRESSES) { |
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my ($host, $port) = @$_; |
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cf::info "listening on ", (format_hostport $host, $port), "\n"; |
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|
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push @LISTENERS, tcp_server $host, $port, sub { |
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my ($fh, $host, $port) = @_ |
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or return; |
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|
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my $lhost = AnyEvent::Socket::format_address |
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+(AnyEvent::Socket::unpack_sockaddr getsockname $fh)[1]; |
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|
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my $id = format_hostport $host, $port; |
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|
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cf::info "$id: accepted connection.\n" |
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if $lhost ne $host; # do not log connections from the host, e.g. for watchdogs |
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|
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my $buf; |
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my $w; $w = AE::io $fh, 0, sub { |
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my $len = sysread $fh, $buf, 512, length $buf; |
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|
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if ($len) { |
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for ($buf) { |
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for my $v (values %DETECTORS) { |
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if (my $cb = $v->[1]()) { |
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undef $w; |
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cf::debug "$id: detected protocol $v->[3].\n"; |
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$v->[2]($id, $fh, $buf); |
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return; |
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} |
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} |
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|
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if (length >= $MAX_DETECT) { # unable to detect protocol |
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undef $w; |
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cf::debug "$id: data received, but cannot detect protocol, closing.\n"; |
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} |
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} |
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} else { |
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undef $w; |
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cf::info "$id: read error during protocol detection ($!)\n"; |
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} |
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}; |
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}; |
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} |
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