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root |
1.17 |
#! perl # mandatory |
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root |
1.1 |
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# this listens for new tcp connections and hands them over to the server core |
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use Socket; |
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root |
1.12 |
use AnyEvent::Socket; |
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root |
1.1 |
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root |
1.20 |
CONF BIND_ADDRESSES = [[undef, 13327]]; |
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root |
1.29 |
CONF DETECT_TIMEOUT = 300; # when to time-out connections |
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root |
1.30 |
CONF LOG_CONNECTS = 1; # whether to even log connects |
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root |
1.20 |
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root |
1.25 |
our $MAX_DETECT; # how many bytes to read to identify the protocol |
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root |
1.21 |
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root |
1.15 |
our @LISTENERS; |
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root |
1.25 |
our @DETECTORS; |
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our %DETECTORS; |
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root |
1.12 |
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root |
1.25 |
sub _update_detectors { |
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$MAX_DETECT = List::Util::max map $_->[1], values %DETECTORS; |
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root |
1.23 |
} |
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root |
1.25 |
sub register($$$$) { |
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my ($name, $max_detect, $detect, $serve) = @_; |
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root |
1.27 |
$DETECTORS{$name} = [$max_detect, $detect, $serve, $name]; |
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root |
1.25 |
_update_detectors; |
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Guard::guard { |
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delete $DETECTORS{$name}; |
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root |
1.28 |
_update_detectors if defined &_update_detectors; |
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root |
1.25 |
} |
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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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root |
1.26 |
$ns->run; |
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root |
1.25 |
$ns->inbuf_append ($_[2]); |
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}; |
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root |
1.20 |
for (@$BIND_ADDRESSES) { |
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root |
1.12 |
my ($host, $port) = @$_; |
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root |
1.16 |
cf::info "listening on ", (format_hostport $host, $port), "\n"; |
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root |
1.12 |
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root |
1.15 |
push @LISTENERS, tcp_server $host, $port, sub { |
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root |
1.12 |
my ($fh, $host, $port) = @_ |
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or return; |
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root |
1.18 |
my $lhost = AnyEvent::Socket::format_address |
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+(AnyEvent::Socket::unpack_sockaddr getsockname $fh)[1]; |
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root |
1.21 |
my $id = format_hostport $host, $port; |
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root |
1.25 |
cf::info "$id: accepted connection.\n" |
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root |
1.30 |
if $lhost ne $host and $LOG_CONNECTS; # do not log connections from the host, e.g. for watchdogs |
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root |
1.12 |
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root |
1.29 |
my ($buf, $t, $r); |
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$r = AE::io $fh, 0, sub { |
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root |
1.21 |
my $len = sysread $fh, $buf, 512, length $buf; |
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if ($len) { |
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root |
1.25 |
for ($buf) { |
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root |
1.27 |
for my $v (values %DETECTORS) { |
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root |
1.25 |
if (my $cb = $v->[1]()) { |
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root |
1.29 |
undef $r; undef $t; |
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root |
1.30 |
cf::info "$id: detected protocol $v->[3].\n"; |
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root |
1.25 |
$v->[2]($id, $fh, $buf); |
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return; |
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} |
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} |
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if (length >= $MAX_DETECT) { # unable to detect protocol |
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root |
1.29 |
undef $r; undef $t; |
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root |
1.30 |
cf::debug "$id: data received, but cannot detect protocol, closing.\n" |
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if $LOG_CONNECTS; |
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root |
1.25 |
} |
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root |
1.21 |
} |
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} else { |
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root |
1.29 |
undef $r; undef $t; |
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root |
1.30 |
cf::info "$id: read error during protocol detection ($!)\n" |
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if $LOG_CONNECTS; |
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root |
1.21 |
} |
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}; |
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root |
1.29 |
$t = EV::timer $DETECT_TIMEOUT, 0, sub { |
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root |
1.30 |
cf::info "$id: protocol detection tiomeout.\n" |
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if $LOG_CONNECTS; |
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root |
1.29 |
shutdown $fh, 0; |
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}; |
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root |
1.12 |
}; |
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root |
1.1 |
} |
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