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#!/usr/bin/python
# need root privileges
import struct
import sys
import time
from socket import AF_INET, AF_INET6, inet_ntoa
sys.path.append('python')
sys.path.append('build/python')
import nfqueue
sys.path.append('dpkt-1.6')
from dpkt import ip
def cb(i,payload):
print "python callback called !", i
print "payload len ", payload.get_length()
data = payload.get_data()
pkt = ip.IP(data)
print "proto:", pkt.p
print "source: %s" % inet_ntoa(pkt.src)
print "dest: %s" % inet_ntoa(pkt.dst)
if pkt.p == ip.IP_PROTO_TCP:
print " sport: %s" % pkt.tcp.sport
print " dport: %s" % pkt.tcp.dport
payload.set_verdict(nfqueue.NF_DROP)
sys.stdout.flush()
return 1
q = nfqueue.queue()
print "open"
q.open()
print "bind"
q.bind(AF_INET);
#print "setting callback (should fail, wrong arg type)"
#try:
# q.set_callback("blah")
#except TypeError, e:
# print "type failure (expected), continuing"
print "setting callback"
q.set_callback(cb)
print "creating queue"
q.create_queue(0)
q.set_queue_maxlen(5000)
print "trying to run"
try:
q.try_run()
except KeyboardInterrupt, e:
print "interrupted"
print "unbind"
q.unbind(AF_INET)
print "close"
q.close()
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