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#!/usr/bin/env python
import unittest
from framework import VppTestCase, VppTestRunner
from util import Util
from template_bd import BridgeDomain
from scapy.layers.l2 import Ether
from scapy.layers.inet import IP, UDP
from scapy_handlers.vxlan import VXLAN
## TestVxlan is a subclass of BridgeDomain, Util, VppTestCase classes.
#
# TestVxlan class defines VXLAN test cases for VXLAN encapsulation,
# decapsulation and VXLAN tunnel termination in L2 bridge-domain.
class TestVxlan(BridgeDomain, Util, VppTestCase):
""" VXLAN Test Case """
## Method to initialize all parent classes.
#
# Initialize BridgeDomain objects, set documentation string for inherited
# tests and initialize VppTestCase object which must be called after
# doc strings are set.
def __init__(self, *args):
BridgeDomain.__init__(self)
self.test_decap.__func__.__doc__ = ' VXLAN BD decapsulation '
self.test_encap.__func__.__doc__ = ' VXLAN BD encapsulation '
VppTestCase.__init__(self, *args)
## Method for VXLAN encapsulate function.
#
# Encapsulate the original payload frame by adding VXLAN header with its
# UDP, IP and Ethernet fields.
def encapsulate(self, pkt):
return (Ether(src=self.MY_MACS[0], dst=self.VPP_MACS[0]) /
IP(src=self.MY_IP4S[0], dst=self.VPP_IP4S[0]) /
UDP(sport=4789, dport=4789, chksum=0) /
VXLAN(vni=1) /
pkt)
## Method for VXLAN decapsulate function.
#
# Decapsulate the original payload frame by removing VXLAN header with
# its UDP, IP and Ethernet fields.
def decapsulate(self, pkt):
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.VPP_MACS[0])
self.assertEqual(pkt[Ether].dst, self.MY_MACS[0])
## Verify VXLAN tunnel source IP is VPP_IP and destination IP is MY_IP.
self.assertEqual(pkt[IP].src, self.VPP_IP4S[0])
self.assertEqual(pkt[IP].dst, self.MY_IP4S[0])
## Verify UDP destination port is VXLAN 4789, source UDP port could be
# arbitrary.
self.assertEqual(pkt[UDP].dport, 4789)
# TODO: checksum check
## Verify VNI, based on configuration it must be 1.
self.assertEqual(pkt[VXLAN].vni, 1)
## 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:
## Create 2 pg interfaces.
cls.create_interfaces(range(2))
## Configure IPv4 addresses on VPP pg0.
cls.config_ip4([0])
## Resolve MAC address for VPP's IP address on pg0.
cls.resolve_arp([0])
## Create VXLAN VTEP on VPP pg0, and put vxlan_tunnel0 and pg1
# into BD.
cls.api("vxlan_add_del_tunnel src %s dst %s vni 1" %
(cls.VPP_IP4S[0], cls.MY_IP4S[0]))
cls.api("sw_interface_set_l2_bridge vxlan_tunnel0 bd_id 1")
cls.api("sw_interface_set_l2_bridge pg1 bd_id 1")
except:
## In case setUpClass fails run tear down.
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()
self.cli(2, "show bridge-domain 1 detail")
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)
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