1#!/usr/bin/env python 2# - 3# SPDX-License-Identifier: BSD-2-Clause 4# 5# Copyright (c) 2020 Alexander V. Chernikov 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# $FreeBSD$ 29# 30 31 32import socket 33import logging 34logging.getLogger("scapy").setLevel(logging.CRITICAL) 35import scapy.all as sc 36import argparse 37 38 39IPPROTO_DIVERT = 258 40 41 42def parse_args(): 43 parser = argparse.ArgumentParser(description='divert socket tester') 44 parser.add_argument('--dip', type=str, help='destination packet IP') 45 parser.add_argument('--divert_port', type=int, default=6668, 46 help='divert port to use') 47 parser.add_argument('--test_name', type=str, required=True, 48 help='test name to run') 49 return parser.parse_args() 50 51 52def ipdivert_ip_output_remote_success(args): 53 packet = sc.IP(dst=args.dip) / sc.ICMP(type='echo-request') 54 with socket.socket(socket.AF_INET, socket.SOCK_RAW, IPPROTO_DIVERT) as s: 55 s.bind(('0.0.0.0', args.divert_port)) 56 s.sendto(bytes(packet), ('0.0.0.0', 0)) 57 58 59def ipdivert_ip6_output_remote_success(args): 60 packet = sc.IPv6(dst=args.dip) / sc.ICMPv6EchoRequest() 61 with socket.socket(socket.AF_INET, socket.SOCK_RAW, IPPROTO_DIVERT) as s: 62 s.bind(('0.0.0.0', args.divert_port)) 63 s.sendto(bytes(packet), ('0.0.0.0', 0)) 64 65 66def ipdivert_ip_input_local_success(args): 67 """Sends IPv4 packet to OS stack as inbound local packet.""" 68 packet = sc.IP(dst=args.dip) / sc.ICMP(type='echo-request') 69 with socket.socket(socket.AF_INET, socket.SOCK_RAW, IPPROTO_DIVERT) as s: 70 s.bind(('0.0.0.0', args.divert_port)) 71 s.sendto(bytes(packet), (args.dip, 0)) 72 73 74# XXX: IPv6 local divert is currently not supported 75# TODO: add IPv4 ifname output verification 76 77 78def main(): 79 args = parse_args() 80 test_ptr = globals()[args.test_name] 81 test_ptr(args) 82 83 84if __name__ == '__main__': 85 main() 86