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#!/usr/bin/env python
import unittest
from framework import VppTestCase, VppTestRunner
from template_bd import BridgeDomain
from scapy.layers.l2 import Ether
from scapy.layers.inet import IP, UDP
from scapy.layers.vxlan import VXLAN
class TestVxlan(BridgeDomain, VppTestCase):
""" VXLAN Test Case """
def __init__(self, *args):
BridgeDomain.__init__(self)
VppTestCase.__init__(self, *args)
def encapsulate(self, pkt):
"""
Encapsulate the original payload frame by adding VXLAN header with its
UDP, IP and Ethernet fields
"""
return (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
IP(src=self.pg0.remote_ip4, dst=self.pg0.local_ip4) /
UDP(sport=self.dport, dport=self.dport, chksum=0) /
VXLAN(vni=self.vni, flags=self.flags) /
pkt)
def decapsulate(self, pkt):
"""
Decapsulate the original payload frame by removing VXLAN header
"""
# check if is set I flag
self.assertEqual(pkt[VXLAN].flags, int('0x8', 16))
return pkt[VXLAN].payload
# Method for checking VXLAN encapsulation.
#
def check_encapsulation(self, pkt):
# TODO: add error messages
# Verify source MAC is VPP_MAC and destination MAC is MY_MAC resolved
# by VPP using ARP.
self.assertEqual(pkt[Ether].src, self.pg0.local_mac)
self.assertEqual(pkt[Ether].dst, self.pg0.remote_mac)
# Verify VXLAN tunnel source IP is VPP_IP and destination IP is MY_IP.
self.assertEqual(pkt[IP].src, self.pg0.local_ip4)
self.assertEqual(pkt[IP].dst, self.pg0.remote_ip4)
# Verify UDP destination port is VXLAN 4789, source UDP port could be
# arbitrary.
self.assertEqual(pkt[UDP].dport, type(self).dport)
# TODO: checksum check
# Verify VNI, based on configuration it must be 1.
self.assertEqual(pkt[VXLAN].vni, type(self).vni)
# Class method to start the VXLAN test case.
# Overrides setUpClass method in VppTestCase class.
# Python try..except statement is used to ensure that the tear down of
# the class will be executed even if exception is raised.
# @param cls The class pointer.
@classmethod
def setUpClass(cls):
super(TestVxlan, cls).setUpClass()
try:
cls.dport = 4789
cls.flags = 0x8
cls.vni = 1
# Create 2 pg interfaces.
cls.create_pg_interfaces(range(2))
cls.pg0.admin_up()
cls.pg1.admin_up()
# Configure IPv4 addresses on VPP pg0.
cls.pg0.config_ip4()
# Resolve MAC address for VPP's IP address on pg0.
cls.pg0.resolve_arp()
# Create VXLAN VTEP on VPP pg0, and put vxlan_tunnel0 and pg1
# into BD.
r = cls.vapi.vxlan_add_del_tunnel(
src_addr=cls.pg0.local_ip4n,
dst_addr=cls.pg0.remote_ip4n,
vni=cls.vni)
cls.vapi.sw_interface_set_l2_bridge(r.sw_if_index, bd_id=1)
cls.vapi.sw_interface_set_l2_bridge(cls.pg1.sw_if_index, bd_id=1)
except Exception:
super(TestVxlan, cls).tearDownClass()
raise
# Method to define VPP actions before tear down of the test case.
# Overrides tearDown method in VppTestCase class.
# @param self The object pointer.
def tearDown(self):
super(TestVxlan, self).tearDown()
if not self.vpp_dead:
self.logger.info(self.vapi.cli("show bridge-domain 1 detail"))
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)
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