Separate files needing GPL license

+ Keep apache license for now, until this is completed:
  https://wiki.fd.io/view/TSC/Relicensing_Procedure
+ Add utilities for switching license comment blocks.
 - They do not preserve attributes, so executable flag is lost.
+ Move the affected files to GPL/.
 + Update paths so files are executed from the new location.
 + Change the way scripts are started to do not require executable flag.
 + Employ OptionString when constructing longer command lines.
+ Move also PacketVerifier.py and TrafficScriptArg.py
  as they are linked with traffic scripts.
 + That means the two files are outside "resources" package tree now.
 + Added __init__.py files so relative imports work in new package tree.
+ Start traffic scripts as python modules to allow relative imports.
 + Once again needed because they are outside the default PYTHONPATH.

Change-Id: Ieb135629e890adbaf5b79497570f3be25b746f9f
Signed-off-by: Vratko Polak <vrpolak@cisco.com>

1 files changed, 0 insertions, 122 deletions

diff --git a/resources/traffic_scripts/policer.py b/resources/traffic_scripts/policer.py
deleted file mode 100755
index 97cad612ac..0000000000
--- a/resources/traffic_scripts/policer.py
+++ /dev/null
@@ -1,122 +0,0 @@
-#!/usr/bin/env python3
-
-# Copyright (c) 2019 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:
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-"""Traffic script for IPsec verification."""
-
-import sys
-import logging
-
-from ipaddress import ip_address
-from scapy.layers.l2 import Ether
-from scapy.layers.inet import IP, TCP
-from scapy.layers.inet6 import IPv6, ICMPv6ND_NS
-from scapy.packet import Raw
-
-from resources.libraries.python.TrafficScriptArg import TrafficScriptArg
-from resources.libraries.python.PacketVerifier import RxQueue, TxQueue
-
-
-def check_ipv4(pkt_recv, dscp):
-    """Check received IPv4 IPsec packet.
-
-    :param pkt_recv: Received packet to verify.
-    :param dscp: DSCP value to check.
-    :type pkt_recv: scapy.Ether
-    :type dscp: int
-    :raises RuntimeError: If received packet is invalid.
-    """
-    if not pkt_recv.haslayer(IP):
-        raise RuntimeError(f"Not an IPv4 packet received: {pkt_recv!r}")
-
-    rx_dscp = pkt_recv[IP].tos >> 2
-    if rx_dscp != dscp:
-        raise RuntimeError(f"Invalid DSCP {rx_dscp} should be {dscp}")
-
-    if not pkt_recv.haslayer(TCP):
-        raise RuntimeError(f"Not a TCP packet received: {pkt_recv!r}")
-
-
-def check_ipv6(pkt_recv, dscp):
-    """Check received IPv6 IPsec packet.
-
-    :param pkt_recv: Received packet to verify.
-    :param dscp: DSCP value to check.
-    :type pkt_recv: scapy.Ether
-    :type dscp: int
-    :raises RuntimeError: If received packet is invalid.
-    """
-    if not pkt_recv.haslayer(IPv6):
-        raise RuntimeError(f"Not an IPv6 packet received: {pkt_recv!r}")
-
-    rx_dscp = pkt_recv[IPv6].tc >> 2
-    if rx_dscp != dscp:
-        raise RuntimeError(f"Invalid DSCP {rx_dscp} should be {dscp}")
-
-    if not pkt_recv.haslayer(TCP):
-        raise RuntimeError(f"Not a TCP packet received: {pkt_recv!r}")
-
-
-# TODO: Pylint says too-many-locals and too-many-statements. Refactor!
-def main():
-    """Send and receive TCP packet."""
-    args = TrafficScriptArg(
-        [u"src_mac", u"dst_mac", u"src_ip", u"dst_ip", u"dscp"]
-    )
-
-    rxq = RxQueue(args.get_arg(u"rx_if"))
-    txq = TxQueue(args.get_arg(u"tx_if"))
-
-    src_mac = args.get_arg(u"src_mac")
-    dst_mac = args.get_arg(u"dst_mac")
-    src_ip = args.get_arg(u"src_ip")
-    dst_ip = args.get_arg(u"dst_ip")
-    dscp = int(args.get_arg(u"dscp"))
-
-    ip_layer = IPv6 if ip_address(src_ip).version == 6 else IP
-
-    sent_packets = list()
-    pkt_send = (Ether(src=src_mac, dst=dst_mac) /
-                ip_layer(src=src_ip, dst=dst_ip) /
-                TCP())
-
-    pkt_send /= Raw()
-    sent_packets.append(pkt_send)
-    txq.send(pkt_send)
-
-    while True:
-        pkt_recv = rxq.recv(2, sent_packets)
-        if pkt_recv is None:
-            raise RuntimeError(u"ICMPv6 echo reply Rx timeout")
-
-        if pkt_recv.haslayer(ICMPv6ND_NS):
-            # read another packet in the queue if the current one is ICMPv6ND_NS
-            continue
-        else:
-            # otherwise process the current packet
-            break
-
-    if pkt_recv is None:
-        raise RuntimeError(u"Rx timeout")
-
-    if ip_layer == IP:
-        check_ipv4(pkt_recv, dscp)
-    else:
-        check_ipv6(pkt_recv, dscp)
-
-    sys.exit(0)
-
-
-if __name__ == u"__main__":
-    main()