#!/usr/bin/env python3
-# Copyright (c) 2020 Cisco and/or its affiliates.
+# Copyright (c) 2021 Cisco and/or its affiliates.
#
# SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
#
#
# Note: If this file is linked with Scapy, which is GPLv2+, your use of it
# must be under GPLv2+. If at any point in the future it is no longer linked
-# with Scapy (or other GPLv2+ licensed software), you are free to choose Apache 2.
+# with Scapy (or other GPLv2+ licensed software), you are free to choose
+# Apache 2.
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
from scapy.fields import FlagsField, BitField, IntField
from scapy.layers.inet import ICMP, IP, UDP
from scapy.layers.inet6 import ICMPv6EchoRequest
-from scapy.layers.inet6 import IPv6
+from scapy.layers.inet6 import IPv6, ICMPv6ND_NS, ICMPv6MLReport2
from scapy.layers.l2 import Ether
from scapy.packet import Raw
name = u"Lisp Inner Layer - IPv6"
-def valid_ipv4(ip):
+def valid_ipv4(ip_address):
+ """Check IPv4 address.
+
+ :param ip_address: IPv4 address to check.
+ :type ip_address: str
+ :returns: True if IP address is correct.
+ :rtype: bool
+ :raises AttributeError, AddressValueError: If IP address is not valid.
+ """
try:
- ipaddress.IPv4Address(ip)
+ ipaddress.IPv4Address(ip_address)
return True
except (AttributeError, ipaddress.AddressValueError):
return False
-def valid_ipv6(ip):
+def valid_ipv6(ip_address):
+ """Check IPv6 address.
+
+ :param ip_address: IPv6 address to check.
+ :type ip_address: str
+ :returns: True if IP address is correct.
+ :rtype: bool
+ :raises AttributeError, AddressValueError: If IP address is not valid.
+ """
try:
- ipaddress.IPv6Address(ip)
+ ipaddress.IPv6Address(ip_address)
return True
except (AttributeError, ipaddress.AddressValueError):
return False
def main():
"""Send IP ICMP packet from one traffic generator interface to the other.
- :raises RuntimeError: If the received packet is not correct."""
+ :raises RuntimeError: If the received packet is not correct.
+ """
args = TrafficScriptArg(
[
sent_packets.append(pkt_raw)
txq.send(pkt_raw)
- if tx_if == rx_if:
- ether = rxq.recv(2, ignore=sent_packets)
- else:
- ether = rxq.recv(2)
-
- if ether is None:
- raise RuntimeError(u"ICMP echo Rx timeout")
+ while True:
+ if tx_if == rx_if:
+ ether = rxq.recv(2, ignore=sent_packets)
+ else:
+ ether = rxq.recv(2)
+
+ if ether is None:
+ raise RuntimeError(u"ICMP echo Rx timeout")
+
+ if ether.haslayer(ICMPv6ND_NS):
+ # read another packet in the queue if the current one is ICMPv6ND_NS
+ continue
+ elif ether.haslayer(ICMPv6MLReport2):
+ # read another packet in the queue if the current one is
+ # ICMPv6MLReport2
+ continue
+
+ # otherwise process the current packet
+ break
if rx_dst_mac == ether[Ether].dst and rx_src_mac == ether[Ether].src:
print(u"MAC addresses match.")