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