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#!/usr/bin/env python
import socket
import unittest
from framework import VppTestCase, VppTestRunner
from template_bd import BridgeDomain
from scapy.layers.l2 import Ether
from scapy.layers.inet6 import IPv6, UDP
from scapy.layers.vxlan import VXLAN
from scapy.utils import atol
class TestVxlan6(BridgeDomain, VppTestCase):
""" VXLAN over IPv6 Test Case """
def __init__(self, *args):
BridgeDomain.__init__(self)
VppTestCase.__init__(self, *args)
def encapsulate(self, pkt, vni):
"""
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) /
IPv6(src=self.pg0.remote_ip6, dst=self.pg0.local_ip6) /
UDP(sport=self.dport, dport=self.dport, chksum=0) /
VXLAN(vni=vni, flags=self.flags) /
pkt)
@classmethod
def ip_range(cls, s, e):
""" range of remote ip's """
tmp = cls.pg0.remote_ip6.rsplit(':', 1)[0]
return ("%s:%x" % (tmp, i) for i in range(s, e))
def encap_mcast(self, pkt, src_ip, src_mac, vni):
"""
Encapsulate the original payload frame by adding VXLAN header with its
UDP, IP and Ethernet fields
"""
return (Ether(src=src_mac, dst=self.mcast_mac) /
IPv6(src=src_ip, dst=self.mcast_ip6) /
UDP(sport=self.dport, dport=self.dport, chksum=0) /
VXLAN(vni=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, vni, local_only=False, mcast_pkt=False):
# 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)
if not local_only:
if not mcast_pkt:
self.assertEqual(pkt[Ether].dst, self.pg0.remote_mac)
else:
self.assertEqual(pkt[Ether].dst, type(self).mcast_mac)
# Verify VXLAN tunnel source IP is VPP_IP and destination IP is MY_IP.
self.assertEqual(pkt[IPv6].src, self.pg0.local_ip6)
if not local_only:
if not mcast_pkt:
self.assertEqual(pkt[IPv6].dst, self.pg0.remote_ip6)
else:
self.assertEqual(pkt[IPv6].dst, type(self).mcast_ip6)
# 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
self.assertEqual(pkt[VXLAN].vni, vni)
@classmethod
def create_vxlan_flood_test_bd(cls, vni, n_ucast_tunnels):
# Create 10 ucast vxlan tunnels under bd
start = 10
end = start + n_ucast_tunnels
next_hop = cls.pg0.remote_ip6n
for dest_ip6 in cls.ip_range(start, end):
dest_ip6n = socket.inet_pton(socket.AF_INET6, dest_ip6)
# add host route so dest ip will not be resolved
cls.vapi.ip_add_del_route(dest_ip6n, 128, next_hop, is_ipv6=1)
r = cls.vapi.vxlan_add_del_tunnel(
is_ipv6=1,
src_addr=cls.pg0.local_ip6n,
dst_addr=dest_ip6n,
vni=vni)
cls.vapi.sw_interface_set_l2_bridge(r.sw_if_index, bd_id=vni)
@classmethod
def add_mcast_tunnels_load(cls):
cls.add_del_mcast_tunnels_load(is_add=1)
@classmethod
def del_mcast_tunnels_load(cls):
cls.add_del_mcast_tunnels_load(is_add=0)
# 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(TestVxlan6, cls).setUpClass()
try:
cls.dport = 4789
cls.flags = 0x8
# Create 2 pg interfaces.
cls.create_pg_interfaces(range(4))
for pg in cls.pg_interfaces:
pg.admin_up()
# Configure IPv4 addresses on VPP pg0.
cls.pg0.config_ip6()
# Resolve MAC address for VPP's IP address on pg0.
cls.pg0.resolve_ndp()
cls.mcast_ip6 = 'ff0e::1'
cls.mcast_ip6n = socket.inet_pton(socket.AF_INET6, cls.mcast_ip6)
cls.mcast_mac = "33:33:00:00:00:%02x" % (1)
# Create VXLAN VTEP on VPP pg0, and put vxlan_tunnel0 and pg1
# into BD.
cls.single_tunnel_bd = 1
r = cls.vapi.vxlan_add_del_tunnel(
is_ipv6=1,
src_addr=cls.pg0.local_ip6n,
dst_addr=cls.pg0.remote_ip6n,
vni=cls.single_tunnel_bd)
cls.vapi.sw_interface_set_l2_bridge(r.sw_if_index,
bd_id=cls.single_tunnel_bd)
cls.vapi.sw_interface_set_l2_bridge(cls.pg1.sw_if_index,
bd_id=cls.single_tunnel_bd)
# Setup vni 2 to test multicast flooding
cls.n_ucast_tunnels = 10
cls.mcast_flood_bd = 2
cls.create_vxlan_flood_test_bd(cls.mcast_flood_bd,
cls.n_ucast_tunnels)
r = cls.vapi.vxlan_add_del_tunnel(
mcast_sw_if_index=1,
src_addr=cls.pg0.local_ip6n,
dst_addr=cls.mcast_ip6n,
vni=cls.mcast_flood_bd, is_ipv6=1)
cls.vapi.sw_interface_set_l2_bridge(r.sw_if_index,
bd_id=cls.mcast_flood_bd)
cls.vapi.sw_interface_set_l2_bridge(cls.pg2.sw_if_index,
bd_id=cls.mcast_flood_bd)
# Setup vni 3 to test unicast flooding
cls.ucast_flood_bd = 3
cls.create_vxlan_flood_test_bd(cls.ucast_flood_bd,
cls.n_ucast_tunnels)
cls.vapi.sw_interface_set_l2_bridge(cls.pg3.sw_if_index,
bd_id=cls.ucast_flood_bd)
except Exception:
super(TestVxlan6, cls).tearDownClass()
raise
@classmethod
def tearDownClass(cls):
super(TestVxlan6, cls).tearDownClass()
# 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(TestVxlan6, self).tearDown()
if not self.vpp_dead:
self.logger.info(self.vapi.cli("show bridge-domain 1 detail"))
self.logger.info(self.vapi.cli("show bridge-domain 2 detail"))
self.logger.info(self.vapi.cli("show bridge-domain 3 detail"))
self.logger.info(self.vapi.cli("show vxlan tunnel"))
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)
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