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, 32 insertions, 0 deletions

diff --git a/GPL/traffic_scripts/vxlan.py b/GPL/traffic_scripts/vxlan.py
new file mode 100644
index 0000000000..b39b419acc
--- /dev/null
+++ b/GPL/traffic_scripts/vxlan.py
@@ -0,0 +1,32 @@
+# 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:
+#
+#     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.
+
+from scapy.fields import BitField, XByteField, X3BytesField
+from scapy.layers.inet import UDP
+from scapy.layers.l2 import Ether
+from scapy.packet import Packet, bind_layers
+
+
+class VXLAN(Packet):
+    name = u"VXLAN"
+    fields_desc = [
+        BitField(u"flags", 0x08000000, 32),
+        X3BytesField(u"vni", 0),
+        XByteField(u"reserved", 0x00)
+    ]
+
+    def mysummary(self):
+        return self.sprintf(f"VXLAN (vni={VXLAN.vni})")
+
+bind_layers(UDP, VXLAN, dport=4789)
+bind_layers(VXLAN, Ether)