test/test_map.py

   1 #!/usr/bin/env python
   2
   3 import unittest
   4 import socket
   5
   6 from framework import VppTestCase, VppTestRunner
   7 from vpp_ip import DpoProto
   8 from vpp_ip_route import VppIpRoute, VppRoutePath
   9
  10 from scapy.layers.l2 import Ether, Raw
  11 from scapy.layers.inet import IP, UDP, ICMP
  12 from scapy.layers.inet6 import IPv6
  13
  14
  15 class TestMAP(VppTestCase):
  16     """ MAP Test Case """
  17
  18     def setUp(self):
  19         super(TestMAP, self).setUp()
  20
  21         # create 2 pg interfaces
  22         self.create_pg_interfaces(range(4))
  23
  24         # pg0 is 'inside' IPv4
  25         self.pg0.admin_up()
  26         self.pg0.config_ip4()
  27         self.pg0.resolve_arp()
  28
  29         # pg1 is 'outside' IPv6
  30         self.pg1.admin_up()
  31         self.pg1.config_ip6()
  32         self.pg1.generate_remote_hosts(4)
  33         self.pg1.configure_ipv6_neighbors()
  34
  35     def tearDown(self):
  36         super(TestMAP, self).tearDown()
  37         for i in self.pg_interfaces:
  38             i.unconfig_ip4()
  39             i.unconfig_ip6()
  40             i.admin_down()
  41
  42     def send_and_assert_encapped(self, tx, ip6_src, ip6_dst, dmac=None):
  43         if not dmac:
  44             dmac = self.pg1.remote_mac
  45
  46         self.pg0.add_stream(tx)
  47
  48         self.pg_enable_capture(self.pg_interfaces)
  49         self.pg_start()
  50
  51         rx = self.pg1.get_capture(1)
  52         rx = rx[0]
  53
  54         self.assertEqual(rx[Ether].dst, dmac)
  55         self.assertEqual(rx[IP].src, tx[IP].src)
  56         self.assertEqual(rx[IPv6].src, ip6_src)
  57         self.assertEqual(rx[IPv6].dst, ip6_dst)
  58
  59     def test_map_e(self):
  60         """ MAP-E """
  61
  62         #
  63         # Add a route to the MAP-BR
  64         #
  65         map_br_pfx = "2001::"
  66         map_br_pfx_len = 64
  67         map_route = VppIpRoute(self,
  68                                map_br_pfx,
  69                                map_br_pfx_len,
  70                                [VppRoutePath(self.pg1.remote_ip6,
  71                                              self.pg1.sw_if_index,
  72                                              proto=DpoProto.DPO_PROTO_IP6)],
  73                                is_ip6=1)
  74         map_route.add_vpp_config()
  75
  76         #
  77         # Add a domain that maps from pg0 to pg1
  78         #
  79         map_dst = socket.inet_pton(socket.AF_INET6, map_br_pfx)
  80         map_src = "3001::1"
  81         map_src_n = socket.inet_pton(socket.AF_INET6, map_src)
  82         client_pfx = socket.inet_pton(socket.AF_INET, "192.168.0.0")
  83
  84         self.vapi.map_add_domain(map_dst,
  85                                  map_br_pfx_len,
  86                                  map_src_n,
  87                                  128,
  88                                  client_pfx,
  89                                  16)
  90
  91         #
  92         # Fire in a v4 packet that will be encapped to the BR
  93         #
  94         v4 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
  95               IP(src=self.pg0.remote_ip4, dst='192.168.1.1') /
  96               UDP(sport=20000, dport=10000) /
  97               Raw('\xa5' * 100))
  98
  99         self.send_and_assert_encapped(v4, map_src, "2001::c0a8:0:0")
 100
 101         #
 102         # Fire in a V6 encapped packet.
 103         #  expect a decapped packet on the inside ip4 link
 104         #
 105         p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
 106              IPv6(dst=map_src, src="2001::1") /
 107              IP(dst=self.pg0.remote_ip4, src='192.168.1.1') /
 108              UDP(sport=20000, dport=10000) /
 109              Raw('\xa5' * 100))
 110
 111         self.pg1.add_stream(p)
 112
 113         self.pg_enable_capture(self.pg_interfaces)
 114         self.pg_start()
 115
 116         rx = self.pg0.get_capture(1)
 117         rx = rx[0]
 118
 119         self.assertFalse(rx.haslayer(IPv6))
 120         self.assertEqual(rx[IP].src, p[IP].src)
 121         self.assertEqual(rx[IP].dst, p[IP].dst)
 122
 123         #
 124         # Pre-resolve. No API for this!!
 125         #
 126         self.vapi.ppcli("map params pre-resolve ip6-nh 4001::1")
 127
 128         self.send_and_assert_no_replies(self.pg0, v4,
 129                                         "resovled via default route")
 130
 131         #
 132         # Add a route to 4001::1. Expect the encapped traffic to be
 133         # sent via that routes next-hop
 134         #
 135         pre_res_route = VppIpRoute(
 136             self, "4001::1", 128,
 137             [VppRoutePath(self.pg1.remote_hosts[2].ip6,
 138                           self.pg1.sw_if_index,
 139                           proto=DpoProto.DPO_PROTO_IP6)],
 140             is_ip6=1)
 141         pre_res_route.add_vpp_config()
 142
 143         self.send_and_assert_encapped(v4, map_src,
 144                                       "2001::c0a8:0:0",
 145                                       dmac=self.pg1.remote_hosts[2].mac)
 146
 147         #
 148         # change the route to the pre-solved next-hop
 149         #
 150         pre_res_route.modify([VppRoutePath(self.pg1.remote_hosts[3].ip6,
 151                                            self.pg1.sw_if_index,
 152                                            proto=DpoProto.DPO_PROTO_IP6)])
 153         pre_res_route.add_vpp_config()
 154
 155         self.send_and_assert_encapped(v4, map_src,
 156                                       "2001::c0a8:0:0",
 157                                       dmac=self.pg1.remote_hosts[3].mac)
 158
 159         #
 160         # cleanup. The test infra's object registry will ensure
 161         # the route is really gone and thus that the unresolve worked.
 162         #
 163         pre_res_route.remove_vpp_config()
 164         self.vapi.ppcli("map params pre-resolve del ip6-nh 4001::1")
 165
 166 if __name__ == '__main__':
 167     unittest.main(testRunner=VppTestRunner)