#!/usr/bin/env python3
import socket
from util import ip4n_range, ip4_range
import unittest
from framework import VppTestCase, VppTestRunner, running_extended_tests
from template_bd import BridgeDomain
from scapy.layers.l2 import Ether
from scapy.packet import Raw
from scapy.layers.inet import IP, UDP
from scapy.layers.vxlan import VXLAN
from scapy.utils import atol
from vpp_ip_route import VppIpRoute, VppRoutePath
from vpp_ip import INVALID_INDEX
@unittest.skipUnless(running_extended_tests, "part of extended tests")
class TestVxlanGpe(BridgeDomain, VppTestCase):
""" VXLAN-GPE 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-GPE 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=vni, flags=self.flags) /
pkt)
def ip_range(self, start, end):
""" range of remote ip's """
return ip4_range(self.pg0.remote_ip4, start, end)
def encap_mcast(self, pkt, src_ip, src_mac, vni):
"""
Encapsulate the original payload frame by adding VXLAN-GPE header
with its UDP, IP and Ethernet fields
"""
return (Ether(src=src_mac, dst=self.mcast_mac) /
IP(src=src_ip, dst=self.mcast_ip4) /
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-GPE header
"""
# check if is set I and P flag
self.assertEqual(pkt[VXLAN].flags, 0x0c)
return pkt[VXLAN].payload
# Method for checking VXLAN-GPE encapsulation.
#
def check_encapsulation(self, pkt, vni, local_only=False, mcast_pkt=False):
# 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-GPE tunnel src IP is VPP_IP and dst IP is MY_IP.
self.assertEqual(pkt[IP].src, self.pg0.local_ip4)
if not local_only:
if not mcast_pkt:
self.assertEqual(pkt[IP].dst, self.pg0.remote_ip4)
else:
self.assertEqual(pkt[IP].dst, type(self).mcast_ip4)
# Verify UDP destination port is VXLAN-GPE 4790, source UDP port
# could be arbitrary.
self.assertEqual(pkt[UDP].dport, type(self).dport)
# Verify VNI
self.assertEqual(pkt[VXLAN].vni, vni)
@classmethod
def create_vxlan_gpe_flood_test_bd(cls, vni, n_ucast_tunnels):
# Create 10 ucast vxlan tunnels under bd
ip_range_start = 10
ip_range_end = ip_range_start + n_ucast_tunnels
next_hop_address = cls.pg0.remote_ip4
for dest_ip4 in ip4_range(next_hop_address, ip_range_start,
ip_range_end):
# add host route so dest_ip4n will not be resolved
rip = VppIpRoute(cls, dest_ip4, 32,
[VppRoutePath(next_hop_address,
INVALID_INDEX)],
register=False)
rip.add_vpp_config()
dest_ip4n = socket.inet_pton(socket.AF_INET, dest_ip4)
r = cls.vapi.vxlan_gpe_add_del_tunnel(
src_addr=cls.pg0.local_ip4n,
dst_addr=dest_ip4n,
vni=vni)
cls.vapi.sw_interface_set_l2_bridge(rx_sw_if_index=r.sw_if_index,
bd_id=vni)
@classmethod
def add_del_shared_mcast_dst_load(cls, is_add):
"""
add or del tunnels sharing the same mcast dst
to test vxlan_gpe ref_count mechanism
"""
n_shared_dst_tunnels = 20
vni_start = 1000
vni_end = vni_start + n_shared_dst_tunnels
for vni in range(vni_start, vni_end):
r = cls.vapi.vxlan_gpe_add_del_tunnel(
src_addr=cls.pg0.local_ip4n,
dst_addr=cls.mcast_ip4n,
mcast_sw_if_index=1,
vni=vni,
is_add=is_add)
if r.sw_if_index == 0xffffffff:
raise ValueError("bad sw_if_index: ~0")
@classmethod
def add_shared_mcast_dst_load(cls):
cls.add_del_shared_mcast_dst_load(is_add=1)
@classmethod
def del_shared_mcast_dst_load(cls):
cls.add_del_shared_mcast_dst_load(is_add=0)
@classmethod
def add_del_mcast_tunnels_load(cls, is_add):
"""
add or del tunnels to test vxlan_gpe stability
"""
n_distinct_dst_tunnels = 20
ip_range_start = 10
ip_range_end = ip_range_start + n_distinct_dst_tunnels
for dest_ip4n in ip4n_range(cls.mcast_ip4n, ip_range_start,
ip_range_end):
vni = bytearray(dest_ip4n)[3]
cls.vapi.vxlan_gpe_add_del_tunnel(
src_addr=cls.pg0.local_ip4n,
dst_addr=dest_ip4n,
mcast_sw_if_index=1,
vni=vni,
is_add=is_add)
@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-GPE 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(TestVxlanGpe, cls).setUpClass()
try:
cls.dport = 4790
cls.flags = 0x0c
# 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_ip4()
# Resolve MAC address for VPP's IP address on pg0.
cls.pg0.resolve_arp()
# Our Multicast address
cls.mcast_ip4 = '239.1.1.1'
cls.mcast_ip4n = socket.inet_pton(socket.AF_INET, cls.mcast_ip4)
iplong = atol(cls.mcast_ip4)
cls.mcast_mac = "01:00:5e:%02x:%02x:%02x" % (
(iplong >> 16) & 0x7F, (iplong >> 8) & 0xFF, iplong & 0xFF)
# Create VXLAN-GPE VTEP on VPP pg0, and put vxlan_gpe_tunnel0
# and pg1 into BD.
cls.single_tunnel_bd = 11
r = cls.vapi.vxlan_gpe_add_del_tunnel(
src_addr=cls.pg0.local_ip4n,
dst_addr=cls.pg0.remote_ip4n,
vni=cls.single_tunnel_bd)
cls.vapi.sw_interface_set_l2_bridge(rx_sw_if_index=r.sw_if_index,
bd_id=cls.single_tunnel_bd)
cls.vapi.sw_interface_set_l2_bridge(
rx_sw_if_index=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 = 12
cls.create_vxlan_gpe_flood_test_bd(cls.mcast_flood_bd,
cls.n_ucast_tunnels)
r = cls.vapi.vxlan_gpe_add_del_tunnel(
src_addr=cls.pg0.local_ip4n,
dst_addr=cls.mcast_ip4n,
mcast_sw_if_index=1,
vni=cls.mcast_flood_bd)
cls.vapi.sw_interface_set_l2_bridge(rx_sw_if_index=r.sw_if_index,
bd_id=cls.mcast_flood_bd)
cls.vapi.sw_interface_set_l2_bridge(
rx_sw_if_index=cls.pg2.sw_if_index, bd_id=cls.mcast_flood_bd)
# Add and delete mcast tunnels to check stability
cls.add_shared_mcast_dst_load()
cls.add_mcast_tunnels_load()
cls.del_shared_mcast_dst_load()
cls.del_mcast_tunnels_load()
# Setup vni 3 to test unicast flooding
cls.ucast_flood_bd = 13
cls.create_vxlan_gpe_flood_test_bd(cls.ucast_flood_bd,
cls.n_ucast_tunnels)
cls.vapi.sw_interface_set_l2_bridge(
rx_sw_if_index=cls.pg3.sw_if_index, bd_id=cls.ucast_flood_bd)
except Exception:
super(TestVxlanGpe, cls).tearDownClass()
raise
@classmethod
def tearDownClass(cls):
super(TestVxlanGpe, cls).tearDownClass()
@unittest.skip("test disabled for vxlan-gpe")
def test_mcast_flood(self):
""" inherited from BridgeDomain """
pass
@unittest.skip("test disabled for vxlan-gpe")
def test_mcast_rcv(self):
""" inherited from BridgeDomain """
pass
# 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(TestVxlanGpe, self).tearDown()
def show_commands_at_teardown(self):
self.logger.info(self.vapi.cli("show bridge-domain 11 detail"))
self.logger.info(self.vapi.cli("show bridge-domain 12 detail"))
self.logger.info(self.vapi.cli("show bridge-domain 13 detail"))
self.logger.info(self.vapi.cli("show int"))
self.logger.info(self.vapi.cli("show vxlan-gpe"))
self.logger.info(self.vapi.cli(/*
* Copyright (c) 2015 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
