Changeset View

Standalone View

				#-
				# SPDX-License-Identifier: BSD-2-Clause
				#
				# Copyright (c) 2024 Klara, Inc.
				#

				import argparse
				import scapy.all as sp
				import sys

				#
				# Emit a router advertisement with the specified prefix.
				#
				def main():
				parser = argparse.ArgumentParser("ra.py",
				description="Emits Router Advertisement packets")
				parser.add_argument('--sendif', nargs=1, required=True,
				help='The interface through which the packet will be sent')
				parser.add_argument('--src', nargs=1, required=True,
				help='The source IP address')
				parser.add_argument('--dst', nargs=1, required=True,
				help='The destination IP address')
				parser.add_argument('--prefix', nargs=1, required=True,
				help='The prefix to be advertised')
				parser.add_argument('--prefixlen', nargs=1, required=True, type=int,
				help='The prefix length to be advertised')

				args = parser.parse_args()
				pkt = sp.Ether() / \
				sp.IPv6(src=args.src, dst=args.dst) / \
				sp.ICMPv6ND_RA(chlim=64) / \
				sp.ICMPv6NDOptPrefixInfo(prefix=args.prefix, prefixlen=args.prefixlen)

				sp.sendp(pkt, iface=args.sendif[0], verbose=False)
				sys.exit(0)

				if __name__ == '__main__':
				main()