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#!/usr/bin/env python3
import socket
import unittest
from framework import VppTestCase, VppTestRunner
from template_bd import BridgeDomain
from scapy.layers.l2 import Ether
from scapy.packet import Raw
from scapy.layers.inet6 import IP, IPv6, UDP
from scapy.layers.vxlan import VXLAN
import util
from vpp_ip_route import VppIpRoute, VppRoutePath
from vpp_vxlan_tunnel import VppVxlanTunnel
from vpp_ip import INVALID_INDEX
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)
# Verify UDP checksum
self.assert_udp_checksum_valid(pkt, ignore_zero_checksum=False)
# 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
for dest_ip6 in cls.ip_range(start, end):
# add host route so dest ip will not be resolved
rip = VppIpRoute(cls, dest_ip6, 128,
[VppRoutePath(cls.pg0.remote_ip6, INVALID_INDEX)],
register=False)
rip.add_vpp_config()
r = VppVxlanTunnel(cls, src=cls.pg0.local_ip6,
dst=dest_ip6, vni=vni)
r.add_vpp_config()
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 IPv6 addresses on VPP pg0.
cls.pg0.config_ip6()
# Resolve MAC address for VPP's IP address on pg0.
cls.pg0.resolve_ndp()
# Our Multicast address
cls.mcast_ip6 = 'ff0e::1'
cls.mcast_mac = util.mcast_ip_to_mac(cls.mcast_ip6)
except Exception:
super(TestVxlan6, cls).tearDownClass()
raise
@classmethod
def tearDownClass(cls):
super(TestVxlan6, cls).tearDownClass()
def setUp(self):
super(TestVxlan6, self).setUp()
# Create VXLAN VTEP on VPP pg0, and put vxlan_tunnel0 and pg1
# into BD.
self.single_tunnel_vni = 0x12345
self.single_tunnel_bd = 1
r = VppVxlanTunnel(self, src=self.pg0.local_ip6,
dst=self.pg0.remote_ip6,
vni=self.single_tunnel_vni)
r.add_vpp_config()
self.vapi.sw_interface_set_l2_bridge(rx_sw_if_index=r.sw_if_index,
bd_id=self.single_tunnel_bd)
self.vapi.sw_interface_set_l2_bridge(
rx_sw_if_index=self.pg1.sw_if_index, bd_id=self.single_tunnel_bd)
# Setup vni 2 to test multicast flooding
self.n_ucast_tunnels = 10
self.mcast_flood_bd = 2
self.create_vxlan_flood_test_bd(self.mcast_flood_bd,
self.n_ucast_tunnels)
r = VppVxlanTunnel(self, src=self.pg0.local_ip6, dst=self.mcast_ip6,
mcast_sw_if_index=1, vni=self.mcast_flood_bd)
r.add_vpp_config()
self.vapi.sw_interface_set_l2_bridge(rx_sw_if_index=r.sw_if_index,
bd_id=self.mcast_flood_bd)
self.vapi.sw_interface_set_l2_bridge(
rx_sw_if_index=self.pg2.sw_if_index, bd_id=self.mcast_flood_bd)
# Setup vni 3 to test unicast flooding
self.ucast_flood_bd = 3
self.create_vxlan_flood_test_bd(self.ucast_flood_bd,
self.n_ucast_tunnels)
self.vapi.sw_interface_set_l2_bridge(
rx_sw_if_index=self.pg3.sw_if_index, bd_id=self.ucast_flood_bd)
# 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()
def show_commands_at_teardown(self):
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"))
def test_encap_fragmented_packet(self):
""" Encapsulation test send fragments from pg1
Verify receipt of encapsulated frames on pg0
"""
frame = (Ether(src='00:00:00:00:00:02', dst='00:00:00:00:00:01') /
IP(src='4.3.2.1', dst='1.2.3.4') /
UDP(sport=20000, dport=10000) /
Raw(b'\xa5' * 1000))
frags = util.fragment_rfc791(frame, 400)
self.pg1.add_stream(frags)
self.pg0.enable_capture()
self.pg_start()
out = self.pg0.get_capture(3)
payload = []
for pkt in out:
payload.append(self.decapsulate(pkt))
self.check_encapsulation(pkt, self.single_tunnel_vni)
reassembled = util.reassemble4(payload)
self.assertEqual(Ether(raw(frame))[IP], reassembled[IP])
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)
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