sourcecode
strredwolf
<code>
#!/usr/bin/perl
$|=1; # Run this with Faucet.
#use strict;
use IO::Socket;
use Net::hostent;
use bytes;
my $remote=$ARGV[0];
my $buf, $byte, @head, $up, $user, $err, $kidpid, $sock, $op, $server;
my $destip, $destport, $i;
### Read in first bytes of the Socks header.
read(STDIN,$buf,4);
@head=unpack("CCn",$buf);
read(STDIN,$buf,4);
$ip=inet_ntoa($buf);
$user='';
while(read(STDIN,$buf,1)) {
last unless(ord $buf);
$user .= $buf;
}
### Do some insanity checking.
$err=91; $op=-1; # Assume Not OK...
$destip=pack("N",0); $destport=0;
if($head[0] == 4) { # SOCKS 4
if($head[1] == 1) { # CONNECT
$sock=IO::Socket::INET->new(Proto=>"tcp",
PeerAddr=>$ip,
PeerPort=>$head[2]);
if($sock) {
$sock->autoflush(1);
$err=90;
}
} elsif($head[1] == 2) { # BIND
$destport=$$; $destip=inet_aton($remote);
$server=IO::Socket::INET->new(Proto=>'tcp',
LocalPort=>$$,
LocalAddr=>$remote,
Listen=>1,
Reuse=>1);
print pack("CCn",0,90,$destport).$destip;
if($sock=$server->accept()) {
$sock->autoflush(1);
if($sock->peerhost eq $ip) {
$err=90;
} else {
close $sock;
}
}
close $server;
}
}
print pack("CCn",0,$err,$destport).$destip;
exit if($err>90);
die "can't fork: $!" unless defined($kidpid=fork());
if($kidpid) {
while(read($sock,$byte,1)){
print STDOUT $byte;
}
kill("TERM", $kidpid);
} else {
while (read(STDIN,$byte,1)) {
print $sock $byte;
}
}
</code>
Something I grew frustrated with, so I wrote up my own Socks 4 server. Supports CONNECT and BIND. Probably extensible to Socks 5 (have to pull the specs on it). Quick and dirty hack.<P>
To use, grab netpipes and use
socks4.pl outgoingIPaddr
Networking Code
[strredwolf]