1#!/usr/bin/env python 2#- 3# SPDX-License-Identifier: BSD-2-Clause 4# 5# Copyright (c) 2019 Netflix, Inc. 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# 28# 29 30import argparse 31import logging 32logging.getLogger("scapy").setLevel(logging.CRITICAL) 33import scapy.all as sp 34import socket 35import sys 36 37def main(): 38 parser = argparse.ArgumentParser("scapyi386.py", 39 description="IPv6 Ethernet Dest MAC test") 40 parser.add_argument('--sendif', nargs=1, 41 required=True, 42 help='The interface through which the packet will be sent') 43 parser.add_argument('--recvif', nargs=1, 44 required=True, 45 help='The interface on which to check for the packet') 46 parser.add_argument('--src', nargs=1, 47 required=True, 48 help='The source IP address') 49 parser.add_argument('--to', nargs=1, 50 required=True, 51 help='The destination IP address') 52 parser.add_argument('--debug', 53 required=False, action='store_true', 54 help='Enable test debugging') 55 56 args = parser.parse_args() 57 58 ######################################################################## 59 # 60 # A test case to check that IPv6 packets are sent with a proper 61 # (resolved) Ethernet Destination MAC address instead of the BCAST one. 62 # This was needed as test cases did not work properly on i386 due to a 63 # scapy BPF parsing bug. (See PR 239380 and duplicates). 64 # 65 bcmac = sp.Ether(dst="ff:ff:ff:ff:ff:ff").dst 66 data = "6" * 88 67 pkt = sp.Ether() / \ 68 sp.IPv6(src=args.src[0], dst=args.to[0]) / \ 69 sp.UDP(dport=3456, sport=6543) / \ 70 data 71 sp.sendp(pkt, iface=args.sendif[0], verbose=False) 72 73 eth = pkt.getlayer(sp.Ether) 74 if eth is None: 75 print("No Ether in packet") 76 pkt.display() 77 sys.exit(1) 78 if eth.dst == bcmac: 79 print("Broadcast dMAC on packet") 80 eth.display() 81 sys.exit(1) 82 83 sys.exit(0) 84 85if __name__ == '__main__': 86 main() 87