#!/usr/bin/env python
+import socket
+from util import ip4n_range, ip4_range, reassemble4
import unittest
-from logging import *
from framework import VppTestCase, VppTestRunner
from template_bd import BridgeDomain
-from scapy.layers.l2 import Ether
+from scapy.layers.l2 import Ether, Raw
from scapy.layers.inet import IP, UDP
-from scapy_handlers.vxlan import VXLAN
+from scapy.layers.vxlan import VXLAN
+from scapy.utils import atol
+from vpp_ip_route import VppIpRoute, VppRoutePath
+from vpp_ip import INVALID_INDEX
class TestVxlan(BridgeDomain, VppTestCase):
BridgeDomain.__init__(self)
VppTestCase.__init__(self, *args)
- def encapsulate(self, pkt):
+ 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) /
IP(src=self.pg0.remote_ip4, dst=self.pg0.local_ip4) /
UDP(sport=self.dport, dport=self.dport, chksum=0) /
- VXLAN(vni=self.vni) /
+ 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 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 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):
+ 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)
- self.assertEqual(pkt[Ether].dst, self.pg0.remote_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[IP].src, self.pg0.local_ip4)
- self.assertEqual(pkt[IP].dst, self.pg0.remote_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 4789, source UDP port could be
# arbitrary.
self.assertEqual(pkt[UDP].dport, type(self).dport)
# TODO: checksum check
- # Verify VNI, based on configuration it must be 1.
- self.assertEqual(pkt[VXLAN].vni, type(self).vni)
+ # 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
+ 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_add_del_tunnel(src_address=cls.pg0.local_ip4n,
+ dst_address=dest_ip4n, vni=vni)
+ cls.vapi.sw_interface_set_l2_bridge(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 ref_count mechanism
+ """
+ n_shared_dst_tunnels = 20
+ vni_start = 10000
+ vni_end = vni_start + n_shared_dst_tunnels
+ for vni in range(vni_start, vni_end):
+ r = cls.vapi.vxlan_add_del_tunnel(src_address=cls.pg0.local_ip4n,
+ dst_address=cls.mcast_ip4n,
+ mcast_sw_if_index=1,
+ is_add=is_add, vni=vni)
+ 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 stability
+ """
+ n_distinct_dst_tunnels = 200
+ 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_add_del_tunnel(src_address=cls.pg0.local_ip4n,
+ dst_address=dest_ip4n,
+ mcast_sw_if_index=1, is_add=is_add,
+ vni=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.
try:
cls.dport = 4789
- cls.vni = 1
+ cls.flags = 0x8
# Create 2 pg interfaces.
- cls.create_pg_interfaces(range(2))
- cls.pg0.admin_up()
- cls.pg1.admin_up()
+ 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 VTEP on VPP pg0, and put vxlan_tunnel0 and pg1
# into BD.
- r = cls.vapi.vxlan_add_del_tunnel(
- src_addr=cls.pg0.local_ip4n,
- dst_addr=cls.pg0.remote_ip4n,
- vni=cls.vni)
- cls.vapi.sw_interface_set_l2_bridge(r.sw_if_index, bd_id=1)
- cls.vapi.sw_interface_set_l2_bridge(cls.pg1.sw_if_index, bd_id=1)
+ cls.single_tunnel_bd = 1
+ r = cls.vapi.vxlan_add_del_tunnel(src_address=cls.pg0.local_ip4n,
+ dst_address=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 = 2
+ cls.create_vxlan_flood_test_bd(cls.mcast_flood_bd,
+ cls.n_ucast_tunnels)
+ r = cls.vapi.vxlan_add_del_tunnel(src_address=cls.pg0.local_ip4n,
+ dst_address=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 = 3
+ cls.create_vxlan_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(TestVxlan, cls).tearDownClass()
raise
+ @classmethod
+ def tearDownClass(cls):
+ super(TestVxlan, cls).tearDownClass()
+
+ def test_encap_big_packet(self):
+ """ Encapsulation test send big frame from pg1
+ Verify receipt of encapsulated frames on pg0
+ """
+
+ self.vapi.sw_interface_set_mtu(self.pg0.sw_if_index, [1500, 0, 0, 0])
+
+ 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('\xa5' * 1450))
+
+ self.pg1.add_stream([frame])
+
+ self.pg0.enable_capture()
+
+ self.pg_start()
+
+ # Pick first received frame and check if it's correctly encapsulated.
+ out = self.pg0.get_capture(2)
+ ether = out[0]
+ pkt = reassemble4(out)
+ pkt = ether / pkt
+ self.check_encapsulation(pkt, self.single_tunnel_bd)
+
+ payload = self.decapsulate(pkt)
+ # TODO: Scapy bug?
+ # self.assert_eq_pkts(payload, frame)
+
# 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()
- if not self.vpp_dead:
- info(self.vapi.cli("show bridge-domain 1 detail"))
+
+ 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"))
+
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)