#!/usr/bin/python

# Change log level to suppress annoying IPv6 error
import logging
logging.getLogger("scapy.runtime").setLevel(logging.ERROR)

from scapy.all import *
import time

# Adjust MAC addresses of sender and recipient of this packet accordingly, the dst MAC 
# should be the MAC of the gateway to use when the target is not on your local subnet
ether=Ether(src="40:eb:60:9f:42:a0",dst="e8:40:f2:d1:b3:a2")
# Set up source and destination IP addresses
ip=IP(src="192.168.1.217", dst="192.168.1.11")

# Assemble an ACK packet with "Hello World\n" as a payload
pkt = ether/ip/TCP(sport=31337, dport=1234, flags="A", seq=43, ack=1337) / ("Hello World\n")
# Write the packet to a pcap file, which can then be sent using a patched version of tcpreplay
wrpcap("ack_with_payload.pcap",pkt)