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|
#!/usr/bin/perl
# proxytee.pl, proxy between a set of dancer servers, dumping the traffic
# between them to stdout
# Based on example 17-6 (recipe 17.13) in the perl cookbook (bighorn sheep)
#
# This file is copyright (C) 2001 Andrew Suffield
# <asuffield@freenode.net>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
use warnings;
use strict;
use FindBin;
use lib "$FindBin::Bin/../lib";
use Dancer::Proxy;
use Carp;
my $port = 6667;
my %servers = ();
my %skip = map {$_ => 1} qw/PING PONG SPINGTIME/;
read_config();
my $listener = Dancer::Proxy::listen($port);
$listener->register('accept', \&accept_connection);
sub accept_connection
{
my ($connection, $listener) = @_;
$connection->register('message', \&handle_message);
$connection->register('connect', \&handle_connect);
$connection->register('close', \&handle_close);
}
sub handle_message
{
my ($connection, $prefix, $command, $args) = @_;
unless ($skip{$command})
{
if (defined $connection->name and defined $connection->peer and defined $connection->peer->name)
{
print $connection->name . " -> " . $connection->peer->name;
}
print " " . Dancer::Proxy::unparse($prefix, $command, @{$args}) . "\n";
}
return '';
}
sub handle_connect
{
my ($connection, $target, $peername, $peerport) = @_;
print "Connecting from " . $connection->name . " to " . $target->name . " ($peername:$peerport)\n";
$target->register('message', \&handle_message);
$target->register('close', \&handle_close);
}
sub handle_close
{
my $connection = shift;
if (defined $connection->name and defined $connection->peer and defined $connection->peer->name)
{
print $connection->name . " -> " . $connection->peer->name . " closing\n";
}
}
1 while Dancer::Proxy::poll;
# NOT REACHED
exit;
sub read_config
{
open(CONF, "proxy.rc")
or die "Can't open proxy.rc: $!\n";
while(my $line = <CONF>)
{
next if $line =~ /^\s*(\#.*)?$/; # Comments and lines containing only whitespace
my ($name, $addr, $port) = $line =~ /(.*),(.*),(.*)/;
Dancer::Proxy::add_server($name, $addr, $port);
}
close CONF;
}
__END__
sub handle
{
my $client = shift;
foreach my $request (@{$ready{$client}})
{
$request =~ s/\r?\n$//;
my ($prefix, $command, @args) = parse($request);
if (exists $peer{$client})
{
unless (exists $skip{$command} or ($command eq 'NOTICE' and not defined $prefix))
{
my $sargs = '';
$sargs = join ' ', (@args) if (scalar @args);
if ($command eq "WALLOPS")
{
# Eliminate forwarded WALLOPS
if ($name{$client} eq $prefix)
{
# Eliminate repeated WALLOPS
unless (defined $last_wallops{$name{$client}}
and $last_wallops{$name{$client}} eq $sargs
and $last_wallops_to{$name{$client}} ne $name{$peer{$client}})
{
print "$name{$client} WALLOPS $sargs\n" if $name{$client} eq $prefix;
$last_wallops{$name{$client}} = $sargs;
$last_wallops_to{$name{$client}} = $name{$peer{$client}};
}
}
}
else
{
my $output = "$name{$client} -> $name{$peer{$client}} ";
$output .= ":$prefix " if defined $prefix;
$output .= $command;
$output .= " " . $sargs if length $sargs;
print "$output\n";
}
}
$outbuffer{$peer{$client}} .= "$request\r\n";
}
else
{
push @{$preconnect_buffer{$client}}, $request;
if ($command eq 'CHALL' and defined $args[1])
{
my ($from, $to) = ($args[0], $args[1]);
print "Server connected, claiming to be $from, asking for $to\n";
my $target = $servers{$to} if exists $servers{$to}
or do
{
print "Don't have a server record for $to\n";
close_socket($client);
return;
};
my $target_socket = IO::Socket::INET->new(PeerAddr => $target->{addr},
PeerPort => $target->{port})
or do
{
print "Couldn't connect to ".$target->{addr}.':'.$target->{port}.": $@\n";
close_socket($client);
return;
};
nonblock($target_socket);
print "Connected to ".$target->{addr}.':'.$target->{port}.", repeating buffer\n";
$peer{$client} = $target_socket;
$peer{$target_socket} = $client;
$name{$client} = $from;
$client_name{$from} = $client;
$name{$target_socket} = $to;
$client_name{$to} = $target_socket;
$select->add($target_socket);
foreach my $line (@{$preconnect_buffer{$client}})
{
$outbuffer{$target_socket} .= "$line\r\n";
}
delete $preconnect_buffer{$client};
}
}
}
delete $ready{$client};
}
|
