test/test_vxlan6.py

   1 #!/usr/bin/env python
   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_ip import INVALID_INDEX
  14
  15
  16 class TestVxlan6(BridgeDomain, VppTestCase):
  17     """ VXLAN over IPv6 Test Case """
  18
  19     def __init__(self, *args):
  20         BridgeDomain.__init__(self)
  21         VppTestCase.__init__(self, *args)
  22
  23     def encapsulate(self, pkt, vni):
  24         """
  25         Encapsulate the original payload frame by adding VXLAN header with its
  26         UDP, IP and Ethernet fields
  27         """
  28         return (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
  29                 IPv6(src=self.pg0.remote_ip6, dst=self.pg0.local_ip6) /
  30                 UDP(sport=self.dport, dport=self.dport, chksum=0) /
  31                 VXLAN(vni=vni, flags=self.flags) /
  32                 pkt)
  33
  34     @classmethod
  35     def ip_range(cls, s, e):
  36         """ range of remote ip's """
  37         tmp = cls.pg0.remote_ip6.rsplit(':', 1)[0]
  38         return ("%s:%x" % (tmp, i) for i in range(s, e))
  39
  40     def encap_mcast(self, pkt, src_ip, src_mac, vni):
  41         """
  42         Encapsulate the original payload frame by adding VXLAN header with its
  43         UDP, IP and Ethernet fields
  44         """
  45         return (Ether(src=src_mac, dst=self.mcast_mac) /
  46                 IPv6(src=src_ip, dst=self.mcast_ip6) /
  47                 UDP(sport=self.dport, dport=self.dport, chksum=0) /
  48                 VXLAN(vni=vni, flags=self.flags) /
  49                 pkt)
  50
  51     def decapsulate(self, pkt):
  52         """
  53         Decapsulate the original payload frame by removing VXLAN header
  54         """
  55         # check if is set I flag
  56         self.assertEqual(pkt[VXLAN].flags, int('0x8', 16))
  57         return pkt[VXLAN].payload
  58
  59     # Method for checking VXLAN encapsulation.
  60     #
  61     def check_encapsulation(self, pkt, vni, local_only=False, mcast_pkt=False):
  62         # TODO: add error messages
  63         # Verify source MAC is VPP_MAC and destination MAC is MY_MAC resolved
  64         #  by VPP using ARP.
  65         self.assertEqual(pkt[Ether].src, self.pg0.local_mac)
  66         if not local_only:
  67             if not mcast_pkt:
  68                 self.assertEqual(pkt[Ether].dst, self.pg0.remote_mac)
  69             else:
  70                 self.assertEqual(pkt[Ether].dst, type(self).mcast_mac)
  71         # Verify VXLAN tunnel source IP is VPP_IP and destination IP is MY_IP.
  72         self.assertEqual(pkt[IPv6].src, self.pg0.local_ip6)
  73         if not local_only:
  74             if not mcast_pkt:
  75                 self.assertEqual(pkt[IPv6].dst, self.pg0.remote_ip6)
  76             else:
  77                 self.assertEqual(pkt[IPv6].dst, type(self).mcast_ip6)
  78         # Verify UDP destination port is VXLAN 4789, source UDP port could be
  79         #  arbitrary.
  80         self.assertEqual(pkt[UDP].dport, type(self).dport)
  81         # TODO: checksum check
  82         # Verify VNI
  83         self.assertEqual(pkt[VXLAN].vni, vni)
  84
  85     @classmethod
  86     def create_vxlan_flood_test_bd(cls, vni, n_ucast_tunnels):
  87         # Create 10 ucast vxlan tunnels under bd
  88         start = 10
  89         end = start + n_ucast_tunnels
  90         for dest_ip6 in cls.ip_range(start, end):
  91             dest_ip6n = socket.inet_pton(socket.AF_INET6, dest_ip6)
  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 = cls.vapi.vxlan_add_del_tunnel(src_address=cls.pg0.local_ip6n,
  98                                               dst_address=dest_ip6n, is_ipv6=1,
  99                                               vni=vni)
 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             # Create VXLAN VTEP on VPP pg0, and put vxlan_tunnel0 and pg1
 139             #  into BD.
 140             cls.single_tunnel_bd = 1
 141             r = cls.vapi.vxlan_add_del_tunnel(src_address=cls.pg0.local_ip6n,
 142                                               dst_address=cls.pg0.remote_ip6n,
 143                                               is_ipv6=1,
 144                                               vni=cls.single_tunnel_bd)
 145             cls.vapi.sw_interface_set_l2_bridge(rx_sw_if_index=r.sw_if_index,
 146                                                 bd_id=cls.single_tunnel_bd)
 147             cls.vapi.sw_interface_set_l2_bridge(
 148                 rx_sw_if_index=cls.pg1.sw_if_index, bd_id=cls.single_tunnel_bd)
 149
 150             # Setup vni 2 to test multicast flooding
 151             cls.n_ucast_tunnels = 10
 152             cls.mcast_flood_bd = 2
 153             cls.create_vxlan_flood_test_bd(cls.mcast_flood_bd,
 154                                            cls.n_ucast_tunnels)
 155             r = cls.vapi.vxlan_add_del_tunnel(src_address=cls.pg0.local_ip6n,
 156                                               dst_address=cls.mcast_ip6n,
 157                                               mcast_sw_if_index=1, is_ipv6=1,
 158                                               vni=cls.mcast_flood_bd)
 159             cls.vapi.sw_interface_set_l2_bridge(rx_sw_if_index=r.sw_if_index,
 160                                                 bd_id=cls.mcast_flood_bd)
 161             cls.vapi.sw_interface_set_l2_bridge(
 162                 rx_sw_if_index=cls.pg2.sw_if_index, bd_id=cls.mcast_flood_bd)
 163
 164             # Setup vni 3 to test unicast flooding
 165             cls.ucast_flood_bd = 3
 166             cls.create_vxlan_flood_test_bd(cls.ucast_flood_bd,
 167                                            cls.n_ucast_tunnels)
 168             cls.vapi.sw_interface_set_l2_bridge(
 169                 rx_sw_if_index=cls.pg3.sw_if_index, bd_id=cls.ucast_flood_bd)
 170         except Exception:
 171             super(TestVxlan6, cls).tearDownClass()
 172             raise
 173
 174     @classmethod
 175     def tearDownClass(cls):
 176         super(TestVxlan6, cls).tearDownClass()
 177
 178     # Method to define VPP actions before tear down of the test case.
 179     #  Overrides tearDown method in VppTestCase class.
 180     #  @param self The object pointer.
 181     def tearDown(self):
 182         super(TestVxlan6, self).tearDown()
 183
 184     def show_commands_at_teardown(self):
 185         self.logger.info(self.vapi.cli("show bridge-domain 1 detail"))
 186         self.logger.info(self.vapi.cli("show bridge-domain 2 detail"))
 187         self.logger.info(self.vapi.cli("show bridge-domain 3 detail"))
 188         self.logger.info(self.vapi.cli("show vxlan tunnel"))
 189
 190
 191 if __name__ == '__main__':
 192     unittest.main(testRunner=VppTestRunner)