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
  13
  14 class TestVxlan6(BridgeDomain, VppTestCase):
  15     """ VXLAN over IPv6 Test Case """
  16
  17     def __init__(self, *args):
  18         BridgeDomain.__init__(self)
  19         VppTestCase.__init__(self, *args)
  20
  21     def encapsulate(self, pkt, vni):
  22         """
  23         Encapsulate the original payload frame by adding VXLAN header with its
  24         UDP, IP and Ethernet fields
  25         """
  26         return (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
  27                 IPv6(src=self.pg0.remote_ip6, dst=self.pg0.local_ip6) /
  28                 UDP(sport=self.dport, dport=self.dport, chksum=0) /
  29                 VXLAN(vni=vni, flags=self.flags) /
  30                 pkt)
  31
  32     @classmethod
  33     def ip_range(cls, s, e):
  34         """ range of remote ip's """
  35         tmp = cls.pg0.remote_ip6.rsplit(':', 1)[0]
  36         return ("%s:%x" % (tmp, i) for i in range(s, e))
  37
  38     def encap_mcast(self, pkt, src_ip, src_mac, vni):
  39         """
  40         Encapsulate the original payload frame by adding VXLAN header with its
  41         UDP, IP and Ethernet fields
  42         """
  43         return (Ether(src=src_mac, dst=self.mcast_mac) /
  44                 IPv6(src=src_ip, dst=self.mcast_ip6) /
  45                 UDP(sport=self.dport, dport=self.dport, chksum=0) /
  46                 VXLAN(vni=vni, flags=self.flags) /
  47                 pkt)
  48
  49     def decapsulate(self, pkt):
  50         """
  51         Decapsulate the original payload frame by removing VXLAN header
  52         """
  53         # check if is set I flag
  54         self.assertEqual(pkt[VXLAN].flags, int('0x8', 16))
  55         return pkt[VXLAN].payload
  56
  57     # Method for checking VXLAN encapsulation.
  58     #
  59     def check_encapsulation(self, pkt, vni, local_only=False, mcast_pkt=False):
  60         # TODO: add error messages
  61         # Verify source MAC is VPP_MAC and destination MAC is MY_MAC resolved
  62         #  by VPP using ARP.
  63         self.assertEqual(pkt[Ether].src, self.pg0.local_mac)
  64         if not local_only:
  65             if not mcast_pkt:
  66                 self.assertEqual(pkt[Ether].dst, self.pg0.remote_mac)
  67             else:
  68                 self.assertEqual(pkt[Ether].dst, type(self).mcast_mac)
  69         # Verify VXLAN tunnel source IP is VPP_IP and destination IP is MY_IP.
  70         self.assertEqual(pkt[IPv6].src, self.pg0.local_ip6)
  71         if not local_only:
  72             if not mcast_pkt:
  73                 self.assertEqual(pkt[IPv6].dst, self.pg0.remote_ip6)
  74             else:
  75                 self.assertEqual(pkt[IPv6].dst, type(self).mcast_ip6)
  76         # Verify UDP destination port is VXLAN 4789, source UDP port could be
  77         #  arbitrary.
  78         self.assertEqual(pkt[UDP].dport, type(self).dport)
  79         # TODO: checksum check
  80         # Verify VNI
  81         self.assertEqual(pkt[VXLAN].vni, vni)
  82
  83     @classmethod
  84     def create_vxlan_flood_test_bd(cls, vni, n_ucast_tunnels):
  85         # Create 10 ucast vxlan tunnels under bd
  86         start = 10
  87         end = start + n_ucast_tunnels
  88         next_hop = cls.pg0.remote_ip6n
  89         for dest_ip6 in cls.ip_range(start, end):
  90             dest_ip6n = socket.inet_pton(socket.AF_INET6, dest_ip6)
  91             # add host route so dest ip will not be resolved
  92             cls.vapi.ip_add_del_route(dest_ip6n, 128, next_hop, is_ipv6=1)
  93             r = cls.vapi.vxlan_add_del_tunnel(
  94                 is_ipv6=1,
  95                 src_addr=cls.pg0.local_ip6n,
  96                 dst_addr=dest_ip6n,
  97                 vni=vni)
  98             cls.vapi.sw_interface_set_l2_bridge(r.sw_if_index, bd_id=vni)
  99
 100     @classmethod
 101     def add_mcast_tunnels_load(cls):
 102         cls.add_del_mcast_tunnels_load(is_add=1)
 103
 104     @classmethod
 105     def del_mcast_tunnels_load(cls):
 106         cls.add_del_mcast_tunnels_load(is_add=0)
 107
 108     # Class method to start the VXLAN test case.
 109     #  Overrides setUpClass method in VppTestCase class.
 110     #  Python try..except statement is used to ensure that the tear down of
 111     #  the class will be executed even if exception is raised.
 112     #  @param cls The class pointer.
 113     @classmethod
 114     def setUpClass(cls):
 115         super(TestVxlan6, cls).setUpClass()
 116
 117         try:
 118             cls.dport = 4789
 119             cls.flags = 0x8
 120
 121             # Create 2 pg interfaces.
 122             cls.create_pg_interfaces(range(4))
 123             for pg in cls.pg_interfaces:
 124                 pg.admin_up()
 125
 126             # Configure IPv4 addresses on VPP pg0.
 127             cls.pg0.config_ip6()
 128
 129             # Resolve MAC address for VPP's IP address on pg0.
 130             cls.pg0.resolve_ndp()
 131
 132             cls.mcast_ip6 = 'ff0e::1'
 133             cls.mcast_ip6n = socket.inet_pton(socket.AF_INET6, cls.mcast_ip6)
 134             cls.mcast_mac = "33:33:00:00:00:%02x" % (1)
 135
 136             # Create VXLAN VTEP on VPP pg0, and put vxlan_tunnel0 and pg1
 137             #  into BD.
 138             cls.single_tunnel_bd = 1
 139             r = cls.vapi.vxlan_add_del_tunnel(
 140                 is_ipv6=1,
 141                 src_addr=cls.pg0.local_ip6n,
 142                 dst_addr=cls.pg0.remote_ip6n,
 143                 vni=cls.single_tunnel_bd)
 144             cls.vapi.sw_interface_set_l2_bridge(r.sw_if_index,
 145                                                 bd_id=cls.single_tunnel_bd)
 146             cls.vapi.sw_interface_set_l2_bridge(cls.pg1.sw_if_index,
 147                                                 bd_id=cls.single_tunnel_bd)
 148
 149             # Setup vni 2 to test multicast flooding
 150             cls.n_ucast_tunnels = 10
 151             cls.mcast_flood_bd = 2
 152             cls.create_vxlan_flood_test_bd(cls.mcast_flood_bd,
 153                                            cls.n_ucast_tunnels)
 154             r = cls.vapi.vxlan_add_del_tunnel(
 155                 mcast_sw_if_index=1,
 156                 src_addr=cls.pg0.local_ip6n,
 157                 dst_addr=cls.mcast_ip6n,
 158                 vni=cls.mcast_flood_bd, is_ipv6=1)
 159             cls.vapi.sw_interface_set_l2_bridge(r.sw_if_index,
 160                                                 bd_id=cls.mcast_flood_bd)
 161             cls.vapi.sw_interface_set_l2_bridge(cls.pg2.sw_if_index,
 162                                                 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(cls.pg3.sw_if_index,
 169                                                 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         if not self.vpp_dead:
 184             self.logger.info(self.vapi.cli("show bridge-domain 1 detail"))
 185             self.logger.info(self.vapi.cli("show bridge-domain 2 detail"))
 186             self.logger.info(self.vapi.cli("show bridge-domain 3 detail"))
 187             self.logger.info(self.vapi.cli("show vxlan tunnel"))
 188
 189
 190 if __name__ == '__main__':
 191     unittest.main(testRunner=VppTestRunner)