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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
count = 0
def cb(i, payload):
global count
print "python callback called !"
count += 1
data = payload.get_data()
pkt = ip.IP(data)
if pkt.p == ip.IP_PROTO_TCP:
print " len %d proto %s src: %s:%s dst %s:%s " % (payload.get_length(),pkt.p,inet_ntoa(pkt.src),pkt.tcp.sport,inet_ntoa(pkt.dst),pkt.tcp.dport)
else:
print " len %d proto %s src: %s dst %s " % (payload.get_length(),pkt.p,inet_ntoa(pkt.src),inet_ntoa(pkt.dst))
payload.set_verdict(nfqueue.NF_ACCEPT)
sys.stdout.flush()
return 1
q = nfqueue.queue()
print "setting callback"
q.set_callback(cb)
print "open"
q.fast_open(0, AF_INET)
q.set_queue_maxlen(50000)
print "trying to run"
try:
q.try_run()
except KeyboardInterrupt, e:
print "interrupted"
print "%d packets handled" % count
print "unbind"
q.unbind(AF_INET)
print "close"
q.close()
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