#!/usr/bin/env python
# quick script to list ports that were not hit
# description:
# http://enablesecurity.com/2008/06/23/restricted-ports-on-the-browsers
# EnableSecurity

import sys
if len(sys.argv) <= 1:
    print "give me a pcap file please"
    sys.exit(1)

from scapy import *
grid = list()
for i in xrange(65536):
    grid.append(0)

packets = rdpcap(sys.argv[1])
packets2 = packets.filter(lambda x: x.getlayer(TCP).flags == 2)
for pkt in packets2:
    dport = pkt.getlayer(TCP).dport
    grid[dport] = 1


for index in xrange(len(grid)):
    if grid[index] == 0:
        print index