#!/usr/bin/env perl
use strict;
$|++;

use Socket;
use IO::Socket::INET;

BEGIN {

  my $GATEWAY = "10.0.1.1";
  my $sock = IO::Socket::INET->new(Proto => 'udp') or die;
  my $pmp = sockaddr_in(5351, inet_aton($GATEWAY));

  sub chat {
    my $to_send = shift;
    send($sock, $to_send, 0, $pmp) or die "send: $!";
    my $portaddr = recv($sock, my $incoming, 256, 0) or die "recv: $!"
+;
    return sockaddr_in($portaddr), $incoming;
  }
}

{
  ## get external IP:
  my @r = chat(pack("C C", 0, 0));
  my ($vers, $op, $result, $epoch, @ip) =
    unpack "C C n N C C C C", $r[2];
  print "$vers $op $result $epoch @ip\n";
}

my $PROTO = 2; # 1 = udp, 2 = tcp
my $EXTERNAL = 8000;
my $INTERNAL = 80;
my $TIME = 3600; # seconds (max is 3600)

while (1) {
  ## map external to internal
  my @r = chat(pack("C C n n n N", 0, $PROTO, 0, $INTERNAL, $EXTERNAL,
+ $TIME));
  my ($vers, $op, $result, $epoch, $priv, $pub, $life) =
    unpack "C C n N n n N", $r[2];
  print "$vers $op $result $epoch $priv $pub $life\n";
  sleep $TIME / 2; # recommended
}

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In reply to Punch hole inbound for Apple NAT-PMP Router by merlyn

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