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.packet import Raw
  10 from scapy.layers.inet6 import IP, IPv6, UDP
  11 from scapy.layers.vxlan import VXLAN
  12
  13 import util
  14 from vpp_ip_route import VppIpRoute, VppRoutePath
  15 from vpp_vxlan_tunnel import VppVxlanTunnel
  16 from vpp_ip import INVALID_INDEX
  17
  18
  19 class TestVxlan6(BridgeDomain, VppTestCase):
  20     """ VXLAN over IPv6 Test Case """
  21
  22     def __init__(self, *args):
  23         BridgeDomain.__init__(self)
  24         VppTestCase.__init__(self, *args)
  25
  26     def encapsulate(self, pkt, vni):
  27         """
  28         Encapsulate the original payload frame by adding VXLAN header with its
  29         UDP, IP and Ethernet fields
  30         """
  31         return (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
  32                 IPv6(src=self.pg0.remote_ip6, dst=self.pg0.local_ip6) /
  33                 UDP(sport=self.dport, dport=self.dport, chksum=0) /
  34                 VXLAN(vni=vni, flags=self.flags) /
  35                 pkt)
  36
  37     @classmethod
  38     def ip_range(cls, s, e):
  39         """ range of remote ip's """
  40         tmp = cls.pg0.remote_ip6.rsplit(':', 1)[0]
  41         return ("%s:%x" % (tmp, i) for i in range(s, e))
  42
  43     def encap_mcast(self, pkt, src_ip, src_mac, vni):
  44         """
  45         Encapsulate the original payload frame by adding VXLAN header with its
  46         UDP, IP and Ethernet fields
  47         """
  48         return (Ether(src=src_mac, dst=self.mcast_mac) /
  49                 IPv6(src=src_ip, dst=self.mcast_ip6) /
  50                 UDP(sport=self.dport, dport=self.dport, chksum=0) /
  51                 VXLAN(vni=vni, flags=self.flags) /
  52                 pkt)
  53
  54     def decapsulate(self, pkt):
  55         """
  56         Decapsulate the original payload frame by removing VXLAN header
  57         """
  58         # check if is set I flag
  59         self.assertEqual(pkt[VXLAN].flags, int('0x8', 16))
  60         return pkt[VXLAN].payload
  61
  62     # Method for checking VXLAN encapsulation.
  63     #
  64     def check_encapsulation(self, pkt, vni, local_only=False, mcast_pkt=False):
  65         # TODO: add error messages
  66         # Verify source MAC is VPP_MAC and destination MAC is MY_MAC resolved
  67         #  by VPP using ARP.
  68         self.assertEqual(pkt[Ether].src, self.pg0.local_mac)
  69         if not local_only:
  70             if not mcast_pkt:
  71                 self.assertEqual(pkt[Ether].dst, self.pg0.remote_mac)
  72             else:
  73                 self.assertEqual(pkt[Ether].dst, type(self).mcast_mac)
  74         # Verify VXLAN tunnel source IP is VPP_IP and destination IP is MY_IP.
  75         self.assertEqual(pkt[IPv6].src, self.pg0.local_ip6)
  76         if not local_only:
  77             if not mcast_pkt:
  78                 self.assertEqual(pkt[IPv6].dst, self.pg0.remote_ip6)
  79             else:
  80                 self.assertEqual(pkt[IPv6].dst, type(self).mcast_ip6)
  81         # Verify UDP destination port is VXLAN 4789, source UDP port could be
  82         #  arbitrary.
  83         self.assertEqual(pkt[UDP].dport, type(self).dport)
  84         # Verify UDP checksum
  85         self.assert_udp_checksum_valid(pkt, ignore_zero_checksum=False)
  86         # Verify VNI
  87         self.assertEqual(pkt[VXLAN].vni, vni)
  88
  89     @classmethod
  90     def create_vxlan_flood_test_bd(cls, vni, n_ucast_tunnels):
  91         # Create 10 ucast vxlan tunnels under bd
  92         start = 10
  93         end = start + n_ucast_tunnels
  94         for dest_ip6 in cls.ip_range(start, end):
  95             # add host route so dest ip will not be resolved
  96             rip = VppIpRoute(cls, dest_ip6, 128,
  97                              [VppRoutePath(cls.pg0.remote_ip6, INVALID_INDEX)],
  98                              register=False)
  99             rip.add_vpp_config()
 100             r = VppVxlanTunnel(cls, src=cls.pg0.local_ip6,
 101                                dst=dest_ip6, vni=vni)
 102             r.add_vpp_config()
 103             cls.vapi.sw_interface_set_l2_bridge(r.sw_if_index, bd_id=vni)
 104
 105     @classmethod
 106     def add_mcast_tunnels_load(cls):
 107         cls.add_del_mcast_tunnels_load(is_add=1)
 108
 109     @classmethod
 110     def del_mcast_tunnels_load(cls):
 111         cls.add_del_mcast_tunnels_load(is_add=0)
 112
 113     # Class method to start the VXLAN test case.
 114     #  Overrides setUpClass method in VppTestCase class.
 115     #  Python try..except statement is used to ensure that the tear down of
 116     #  the class will be executed even if exception is raised.
 117     #  @param cls The class pointer.
 118     @classmethod
 119     def setUpClass(cls):
 120         super(TestVxlan6, cls).setUpClass()
 121
 122         try:
 123             cls.dport = 4789
 124             cls.flags = 0x8
 125
 126             # Create 2 pg interfaces.
 127             cls.create_pg_interfaces(range(4))
 128             for pg in cls.pg_interfaces:
 129                 pg.admin_up()
 130
 131             # Configure IPv6 addresses on VPP pg0.
 132             cls.pg0.config_ip6()
 133
 134             # Resolve MAC address for VPP's IP address on pg0.
 135             cls.pg0.resolve_ndp()
 136
 137             # Our Multicast address
 138             cls.mcast_ip6 = 'ff0e::1'
 139             cls.mcast_mac = util.mcast_ip_to_mac(cls.mcast_ip6)
 140         except Exception:
 141             super(TestVxlan6, cls).tearDownClass()
 142             raise
 143
 144     @classmethod
 145     def tearDownClass(cls):
 146         super(TestVxlan6, cls).tearDownClass()
 147
 148     def setUp(self):
 149         super(TestVxlan6, self).setUp()
 150         # Create VXLAN VTEP on VPP pg0, and put vxlan_tunnel0 and pg1
 151         #  into BD.
 152         self.single_tunnel_vni = 0x12345
 153         self.single_tunnel_bd = 1
 154         r = VppVxlanTunnel(self, src=self.pg0.local_ip6,
 155                            dst=self.pg0.remote_ip6,
 156                            vni=self.single_tunnel_vni)
 157         r.add_vpp_config()
 158         self.vapi.sw_interface_set_l2_bridge(rx_sw_if_index=r.sw_if_index,
 159                                              bd_id=self.single_tunnel_bd)
 160         self.vapi.sw_interface_set_l2_bridge(
 161             rx_sw_if_index=self.pg1.sw_if_index, bd_id=self.single_tunnel_bd)
 162
 163         # Setup vni 2 to test multicast flooding
 164         self.n_ucast_tunnels = 10
 165         self.mcast_flood_bd = 2
 166         self.create_vxlan_flood_test_bd(self.mcast_flood_bd,
 167                                         self.n_ucast_tunnels)
 168         r = VppVxlanTunnel(self, src=self.pg0.local_ip6, dst=self.mcast_ip6,
 169                            mcast_sw_if_index=1, vni=self.mcast_flood_bd)
 170         r.add_vpp_config()
 171         self.vapi.sw_interface_set_l2_bridge(rx_sw_if_index=r.sw_if_index,
 172                                              bd_id=self.mcast_flood_bd)
 173         self.vapi.sw_interface_set_l2_bridge(
 174             rx_sw_if_index=self.pg2.sw_if_index, bd_id=self.mcast_flood_bd)
 175
 176         # Setup vni 3 to test unicast flooding
 177         self.ucast_flood_bd = 3
 178         self.create_vxlan_flood_test_bd(self.ucast_flood_bd,
 179                                         self.n_ucast_tunnels)
 180         self.vapi.sw_interface_set_l2_bridge(
 181             rx_sw_if_index=self.pg3.sw_if_index, bd_id=self.ucast_flood_bd)
 182
 183     # Method to define VPP actions before tear down of the test case.
 184     #  Overrides tearDown method in VppTestCase class.
 185     #  @param self The object pointer.
 186     def tearDown(self):
 187         super(TestVxlan6, self).tearDown()
 188
 189     def show_commands_at_teardown(self):
 190         self.logger.info(self.vapi.cli("show bridge-domain 1 detail"))
 191         self.logger.info(self.vapi.cli("show bridge-domain 2 detail"))
 192         self.logger.info(self.vapi.cli("show bridge-domain 3 detail"))
 193         self.logger.info(self.vapi.cli("show vxlan tunnel"))
 194
 195     def test_encap_fragmented_packet(self):
 196         """ Encapsulation test send fragments from pg1
 197         Verify receipt of encapsulated frames on pg0
 198         """
 199
 200         frame = (Ether(src='00:00:00:00:00:02', dst='00:00:00:00:00:01') /
 201                  IP(src='4.3.2.1', dst='1.2.3.4') /
 202                  UDP(sport=20000, dport=10000) /
 203                  Raw(b'\xa5' * 1000))
 204
 205         frags = util.fragment_rfc791(frame, 400)
 206
 207         self.pg1.add_stream(frags)
 208
 209         self.pg0.enable_capture()
 210
 211         self.pg_start()
 212
 213         out = self.pg0.get_capture(3)
 214
 215         payload = []
 216         for pkt in out:
 217             payload.append(self.decapsulate(pkt))
 218             self.check_encapsulation(pkt, self.single_tunnel_vni)
 219
 220         reassembled = util.reassemble4(payload)
 221
 222         self.assertEqual(Ether(raw(frame))[IP], reassembled[IP])
 223
 224
 225 if __name__ == '__main__':
 226     unittest.main(testRunner=VppTestRunner)