1#!/usr/bin/env python3 2# 3# SPDX-License-Identifier: BSD-2-Clause 4# 5# Copyright (c) 2021 Rubicon Communications, LLC (Netgate) 6# 7# Redistribution and use in source and binary forms, with or without 8# modification, are permitted provided that the following conditions 9# are met: 10# 1. Redistributions of source code must retain the above copyright 11# notice, this list of conditions and the following disclaimer. 12# 2. Redistributions in binary form must reproduce the above copyright 13# notice, this list of conditions and the following disclaimer in the 14# documentation and/or other materials provided with the distribution. 15# 16# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26# SUCH DAMAGE. 27 28import argparse 29import logging 30logging.getLogger("scapy").setLevel(logging.CRITICAL) 31import scapy.all as sp 32 33def syn_flood(args): 34 s = sp.conf.L2socket(iface=args.sendif[0]) 35 36 # Set a src mac, to avoid doing lookups which really slow us down. 37 ether = sp.Ether(src='01:02:03:04:05') 38 if args.ip6: 39 ip = sp.IPv6(dst=args.to[0]) 40 else: 41 ip = sp.IP(dst=args.to[0]) 42 for i in range(int(args.count[0])): 43 tcp = sp.TCP(flags='S', sport=1+i, dport=22, seq=500+i) 44 pkt = ether / ip / tcp 45 s.send(pkt) 46 47def main(): 48 parser = argparse.ArgumentParser("pft_synflood.py", 49 description="SYN flooding tool") 50 parser.add_argument('--ip6', 51 action='store_true', 52 help='Use IPv6 rather than IPv4') 53 parser.add_argument('--sendif', nargs=1, 54 required=True, 55 help='The interface through which the packet(s) will be sent') 56 parser.add_argument('--to', nargs=1, 57 required=True, 58 help='The destination IP address for the SYN packets') 59 parser.add_argument('--count', nargs=1, 60 required=True, 61 help='The number of packets to send') 62 63 args = parser.parse_args() 64 65 syn_flood(args) 66 67if __name__ == '__main__': 68 main() 69