test/test_vxlan6.py

   1 #!/usr/bin/env python3
   2
   3 import socket
   4 import unittest
   5 from framework import VppTestCase, VppTestRunner
   6 from template_bd import BridgeDomain
   7
   8 from scapy.layers.l2 import Ether
   9 from scapy.layers.inet6 import IPv6, UDP
  10 from scapy.layers.vxlan import VXLAN
  11 from scapy.utils import atol
  12 from vpp_ip_route import VppIpRoute, VppRoutePath
  13 from vpp_vxlan_tunnel import VppVxlanTunnel
  14 from vpp_ip import INVALID_INDEX
  15
  16
  17 class TestVxlan6(BridgeDomain, VppTestCase):
  18     """ VXLAN over IPv6 Test Case """
  19
  20     def __init__(self, *args):
  21         BridgeDomain.__init__(self)
  22         VppTestCase.__init__(self, *args)
  23
  24     def encapsulate(self, pkt, vni):
  25         """
  26         Encapsulate the original payload frame by adding VXLAN header with its
  27         UDP, IP and Ethernet fields
  28         """
  29         return (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
  30                 IPv6(src=self.pg0.remote_ip6, dst=self.pg0.local_ip6) /
  31                 UDP(sport=self.dport, dport=self.dport, chksum=0) /
  32                 VXLAN(vni=vni, flags=self.flags) /
  33                 pkt)
  34
  35     @classmethod
  36     def ip_range(cls, s, e):
  37         """ range of remote ip's """
  38         tmp = cls.pg0.remote_ip6.rsplit(':', 1)[0]
  39         return ("%s:%x" % (tmp, i) for i in range(s, e))
  40
  41     def encap_mcast(self, pkt, src_ip, src_mac, vni):
  42         """
  43         Encapsulate the original payload frame by adding VXLAN header with its
  44         UDP, IP and Ethernet fields
  45         """
  46         return (Ether(src=src_mac, dst=self.mcast_mac) /
  47                 IPv6(src=src_ip, dst=self.mcast_ip6) /
  48                 UDP(sport=self.dport, dport=self.dport, chksum=0) /
  49                 VXLAN(vni=vni, flags=self.flags) /
  50                 pkt)
  51
  52     def decapsulate(self, pkt):
  53         """
  54         Decapsulate the original payload frame by removing VXLAN header
  55         """
  56         # check if is set I flag
  57         self.assertEqual(pkt[VXLAN].flags, int('0x8', 16))
  58         return pkt[VXLAN].payload
  59
  60     # Method for checking VXLAN encapsulation.
  61     #
  62     def check_encapsulation(self, pkt, vni, local_only=False, mcast_pkt=False):
  63         # TODO: add error messages
  64         # Verify source MAC is VPP_MAC and destination MAC is MY_MAC resolved
  65         #  by VPP using ARP.
  66         self.assertEqual(pkt[Ether].src, self.pg0.local_mac)
  67         if not local_only:
  68             if not mcast_pkt:
  69                 self.assertEqual(pkt[Ether].dst, self.pg0.remote_mac)
  70             else:
  71                 self.assertEqual(pkt[Ether].dst, type(self).mcast_mac)
  72         # Verify VXLAN tunnel source IP is VPP_IP and destination IP is MY_IP.
  73         self.assertEqual(pkt[IPv6].src, self.pg0.local_ip6)
  74         if not local_only:
  75             if not mcast_pkt:
  76                 self.assertEqual(pkt[IPv6].dst, self.pg0.remote_ip6)
  77             else:
  78                 self.assertEqual(pkt[IPv6].dst, type(self).mcast_ip6)
  79         # Verify UDP destination port is VXLAN 4789, source UDP port could be
  80         #  arbitrary.
  81         self.assertEqual(pkt[UDP].dport, type(self).dport)
  82         # TODO: checksum check
  83         # Verify VNI
  84         self.assertEqual(pkt[VXLAN].vni, vni)
  85
  86     @classmethod
  87     def create_vxlan_flood_test_bd(cls, vni, n_ucast_tunnels):
  88         # Create 10 ucast vxlan tunnels under bd
  89         start = 10
  90         end = start + n_ucast_tunnels
  91         for dest_ip6 in cls.ip_range(start, end):
  92             # add host route so dest ip will not be resolved
  93             rip = VppIpRoute(cls, dest_ip6, 128,
  94                              [VppRoutePath(cls.pg0.remote_ip6, INVALID_INDEX)],
  95                              register=False)
  96             rip.add_vpp_config()
  97             r = VppVxlanTunnel(cls, src=cls.pg0.local_ip6,
  98                                dst=dest_ip6, vni=vni)
  99             r.add_vpp_config()
 100             cls.vapi.sw_interface_set_l2_bridge(r.sw_if_index, bd_id=vni)
 101
 102     @classmethod
 103     def add_mcast_tunnels_load(cls):
 104         cls.add_del_mcast_tunnels_load(is_add=1)
 105
 106     @classmethod
 107     def del_mcast_tunnels_load(cls):
 108         cls.add_del_mcast_tunnels_load(is_add=0)
 109
 110     # Class method to start the VXLAN test case.
 111     #  Overrides setUpClass method in VppTestCase class.
 112     #  Python try..except statement is used to ensure that the tear down of
 113     #  the class will be executed even if exception is raised.
 114     #  @param cls The class pointer.
 115     @classmethod
 116     def setUpClass(cls):
 117         super(TestVxlan6, cls).setUpClass()
 118
 119         try:
 120             cls.dport = 4789
 121             cls.flags = 0x8
 122
 123             # Create 2 pg interfaces.
 124             cls.create_pg_interfaces(range(4))
 125             for pg in cls.pg_interfaces:
 126                 pg.admin_up()
 127
 128             # Configure IPv4 addresses on VPP pg0.
 129             cls.pg0.config_ip6()
 130
 131             # Resolve MAC address for VPP's IP address on pg0.
 132             cls.pg0.resolve_ndp()
 133
 134             cls.mcast_ip6 = 'ff0e::1'
 135             cls.mcast_ip6n = socket.inet_pton(socket.AF_INET6, cls.mcast_ip6)
 136             cls.mcast_mac = "33:33:00:00:00:%02x" % (1)
 137
 138         except Exception:
 139             super(TestVxlan6, cls).tearDownClass()
 140             raise
 141
 142     @classmethod
 143     def tearDownClass(cls):
 144         super(TestVxlan6, cls).tearDownClass()
 145
 146     def setUp(self):
 147         super(TestVxlan6, self).setUp()
 148         # Create VXLAN VTEP on VPP pg0, and put vxlan_tunnel0 and pg1
 149         #  into BD.
 150         self.single_tunnel_bd = 1
 151         r = VppVxlanTunnel(self, src=self.pg0.local_ip6,
 152                            dst=self.pg0.remote_ip6, vni=self.single_tunnel_bd)
 153         r.add_vpp_config()
 154         self.vapi.sw_interface_set_l2_bridge(rx_sw_if_index=r.sw_if_index,
 155                                              bd_id=self.single_tunnel_bd)
 156         self.vapi.sw_interface_set_l2_bridge(
 157             rx_sw_if_index=self.pg1.sw_if_index, bd_id=self.single_tunnel_bd)
 158
 159         # Setup vni 2 to test multicast flooding
 160         self.n_ucast_tunnels = 10
 161         self.mcast_flood_bd = 2
 162         self.create_vxlan_flood_test_bd(self.mcast_flood_bd,
 163                                         self.n_ucast_tunnels)
 164         r = VppVxlanTunnel(self, src=self.pg0.local_ip6, dst=self.mcast_ip6,
 165                            mcast_sw_if_index=1, vni=self.mcast_flood_bd)
 166         r.add_vpp_config()
 167         self.vapi.sw_interface_set_l2_bridge(rx_sw_if_index=r.sw_if_index,
 168                                              bd_id=self.mcast_flood_bd)
 169         self.vapi.sw_interface_set_l2_bridge(
 170             rx_sw_if_index=self.pg2.sw_if_index, bd_id=self.mcast_flood_bd)
 171
 172         # Setup vni 3 to test unicast flooding
 173         self.ucast_flood_bd = 3
 174         self.create_vxlan_flood_test_bd(self.ucast_flood_bd,
 175                                         self.n_ucast_tunnels)
 176         self.vapi.sw_interface_set_l2_bridge(
 177             rx_sw_if_index=self.pg3.sw_if_index, bd_id=self.ucast_flood_bd)
 178
 179     # Method to define VPP actions before tear down of the test case.
 180     #  Overrides tearDown method in VppTestCase class.
 181     #  @param self The object pointer.
 182     def tearDown(self):
 183         super(TestVxlan6, self).tearDown()
 184
 185     def show_commands_at_teardown(self):
 186         self.logger.info(self.vapi.cli("show bridge-domain 1 detail"))
 187         self.logger.info(self.vapi.cli("show bridge-domain 2 detail"))
 188         self.logger.info(self.vapi.cli("show bridge-domain 3 detail"))
 189         self.logger.info(self.vapi.cli("show vxlan tunnel"))
 190
 191
 192 if __name__ == '__main__':
 193     unittest.main(testRunner=VppTestRunner)