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