Initial GENEVE TUNNEL implementation and tests.

Notes on this first implementation:
* First version of the implementation does NOT support GENEVE OPTIONS
HEADER: it isn't well understood what the purpose of the OPTIONS will be and/or
what content would be placed in the variable option data;

Once the IETF work will evolve and further information will be available
it could be possible to modify the frame rewrite to contemplate the
actual GENEVE OPTIONS.

Change-Id: Iddfe6f408cc45bb0800f00ce6a3e302e48a4ed52
Signed-off-by: Marco Varlese <marco.varlese@suse.com>

2 files changed, 69 insertions, 0 deletions

diff --git a/test/patches/scapy-2.3.3/enable_geneve.patch b/test/patches/scapy-2.3.3/enable_geneve.patch
new file mode 100644
index 00000000000..4e91b219d3e
--- /dev/null
+++ b/test/patches/scapy-2.3.3/enable_geneve.patch
@@ -0,0 +1,13 @@
+diff --git a/scapy/config.py b/scapy/config.py
+index cc97c6d..887b639 100755
+--- a/scapy/config.py
++++ b/scapy/config.py
+@@ -439,7 +439,7 @@ debug_tls:When 1, print some TLS session secrets when they are computed.
+                    "mobileip", "netbios", "netflow", "ntp", "ppp", "pptp",
+                    "radius", "rip", "rtp", "skinny", "smb", "snmp",
+                    "tftp", "x509", "bluetooth", "dhcp6", "llmnr",
+-                   "sctp", "vrrp", "ipsec", "lltd", "vxlan", "eap"]
++                   "sctp", "vrrp", "ipsec", "lltd", "vxlan", "eap", "geneve"]
+     contribs = dict()
+     crypto_valid = isCryptographyValid()
+     crypto_valid_advanced = isCryptographyAdvanced()
diff --git a/test/patches/scapy-2.3.3/geneve.patch b/test/patches/scapy-2.3.3/geneve.patch
new file mode 100644
index 00000000000..92752f1196e
--- /dev/null
+++ b/test/patches/scapy-2.3.3/geneve.patch
@@ -0,0 +1,56 @@
+diff --git a/scapy/layers/geneve.py b/scapy/layers/geneve.py
+new file mode 100644
+index 0000000..e2ca888
+--- /dev/null
++++ b/scapy/layers/geneve.py
+@@ -0,0 +1,50 @@
++#! /usr/bin/env python
++# (GENEVE):
++# A Framework for Overlaying Virtualized Layer 2 Networks over Layer 3 Networks
++
++from scapy.packet import Packet, bind_layers
++from scapy.layers.l2 import Ether
++from scapy.layers.inet import IP, UDP
++from scapy.layers.inet6 import IPv6
++from scapy.fields import FlagsField, XByteField, ThreeBytesField, \
++    ConditionalField, ShortField, ByteEnumField, X3BytesField
++
++#
++# +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
++# |Ver|  Opt Len  |O|C|    Rsvd.  |          Protocol Type        |
++# +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
++# |        Virtual Network Identifier (VNI)       |    Reserved   |
++# +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
++# |                    Variable Length Options                    |
++# +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
++#
++
++class GENEVE(Packet):
++    name = "GENEVE"
++
++    fields_desc = [
++        # INIT = ver + optlen + o + c + rsvd (all zeros)
++        ShortField("init", 0x0),
++        # PROTOCOL is a 2-bytes field
++        ShortField("protocol", 0x6558),
++        ThreeBytesField("vni", 0),
++        XByteField("reserved2", 0),
++    ]
++
++    def mysummary(self):
++        return self.sprintf("GENEVE (vni=%GENEVE.vni%)")
++
++bind_layers(UDP, GENEVE, dport=6081)  # RFC standard port
++bind_layers(UDP, GENEVE, dport=6081)  # New IANA assigned port for use with NSH
++bind_layers(UDP, GENEVE, dport=8472)  # Linux implementation port
++# By default, set both ports to the RFC standard
++bind_layers(UDP, GENEVE, sport=6081, dport=6081)
++
++bind_layers(GENEVE, Ether)
++bind_layers(GENEVE, IP, NextProtocol=1)
++bind_layers(GENEVE, IPv6, NextProtocol=2)
++bind_layers(GENEVE, Ether, flags=4, NextProtocol=0)
++bind_layers(GENEVE, IP, flags=4, NextProtocol=1)
++bind_layers(GENEVE, IPv6, flags=4, NextProtocol=2)
++bind_layers(GENEVE, Ether, flags=4, NextProtocol=3)
++