#!/usr/bin/python3
# -*- coding: utf-8 -*-

# Run the UDP server from our last lecture page first.

# UDP raw socket
import socket
import struct

s = socket.socket(socket.AF_INET, socket.SOCK_RAW, socket.IPPROTO_UDP)
data = "string"
sport = 1337  # arbitrary source port
dport = 12000  # arbitrary destination port
length = 8 + len(data)
checksum = 0
udp_header = struct.pack("!HHHH", sport, dport, length, checksum)
s.sendto(udp_header + data.encode(), ("", dport))