-# Copyright (c) 2020 Cisco and/or its affiliates.
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at:
+# Copyright (c) 2021 Cisco and/or its affiliates.
+#
+# SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
+#
+# Licensed under the Apache License 2.0 or
+# GNU General Public License v2.0 or later; you may not use this file
+# except in compliance with one of these Licenses. You
+# may obtain a copy of the Licenses at:
#
# http://www.apache.org/licenses/LICENSE-2.0
+# https://www.gnu.org/licenses/old-licenses/gpl-2.0-standalone.html
+#
+# 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.
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
import os
import select
+import time
from scapy.all import ETH_P_IP, ETH_P_IPV6, ETH_P_ALL, ETH_P_ARP
from scapy.config import conf
def auto_pad(packet):
"""Pads zeroes at the end of the packet if the total packet length is less
- then 64 bytes in case of IPv4 or 78 bytes in case of IPv6.
+ then 60 bytes in case of IPv4 or 78 bytes in case of IPv6.
"""
- min_len = 78 if packet.haslayer(IPv6) else 64
+ # TODO: add document explaining deduction of FCS part
+ min_len = 78 if packet.haslayer(IPv6) else 60
pad_layer = Raw if packet.haslayer(Raw) \
else Padding if packet.haslayer(Padding) else None
if pad_layer: