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
   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_no_replies(self, intf, pkts, remark):
  42         intf.add_stream(pkts)
  43         self.pg_enable_capture(self.pg_interfaces)
  44         self.pg_start()
  45         for i in self.pg_interfaces:
  46             i.assert_nothing_captured(remark=remark)
  47
  48     def send_and_assert_encapped(self, tx, ip6_src, ip6_dst, dmac=None):
  49         if not dmac:
  50             dmac = self.pg1.remote_mac
  51
  52         self.pg0.add_stream(tx)
  53
  54         self.pg_enable_capture(self.pg_interfaces)
  55         self.pg_start()
  56
  57         rx = self.pg1.get_capture(1)
  58         rx = rx[0]
  59
  60         self.assertEqual(rx[Ether].dst, dmac)
  61         self.assertEqual(rx[IP].src, tx[IP].src)
  62         self.assertEqual(rx[IPv6].src, ip6_src)
  63         self.assertEqual(rx[IPv6].dst, ip6_dst)
  64
  65     def test_map_e(self):
  66         """ MAP-E """
  67
  68         #
  69         # Add a route to the MAP-BR
  70         #
  71         map_br_pfx = "2001::"
  72         map_br_pfx_len = 64
  73         map_route = VppIpRoute(self,
  74                                map_br_pfx,
  75                                map_br_pfx_len,
  76                                [VppRoutePath(self.pg1.remote_ip6,
  77                                              self.pg1.sw_if_index,
  78                                              is_ip6=1)],
  79                                is_ip6=1)
  80         map_route.add_vpp_config()
  81
  82         #
  83         # Add a domain that maps from pg0 to pg1
  84         #
  85         map_dst = socket.inet_pton(socket.AF_INET6, map_br_pfx)
  86         map_src = "3001::1"
  87         map_src_n = socket.inet_pton(socket.AF_INET6, map_src)
  88         client_pfx = socket.inet_pton(socket.AF_INET, "192.168.0.0")
  89
  90         self.vapi.map_add_domain(map_dst,
  91                                  map_br_pfx_len,
  92                                  map_src_n,
  93                                  128,
  94                                  client_pfx,
  95                                  16)
  96
  97         #
  98         # Fire in a v4 packet that will be encapped to the BR
  99         #
 100         v4 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
 101               IP(src=self.pg0.remote_ip4, dst='192.168.1.1') /
 102               UDP(sport=20000, dport=10000) /
 103               Raw('\xa5' * 100))
 104
 105         self.send_and_assert_encapped(v4, map_src, "2001::c0a8:0:0")
 106
 107         #
 108         # Fire in a V6 encapped packet.
 109         #  expect a decapped packet on the inside ip4 link
 110         #
 111         p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
 112              IPv6(dst=map_src, src="2001::1") /
 113              IP(dst=self.pg0.remote_ip4, src='192.168.1.1') /
 114              UDP(sport=20000, dport=10000) /
 115              Raw('\xa5' * 100))
 116
 117         self.pg1.add_stream(p)
 118
 119         self.pg_enable_capture(self.pg_interfaces)
 120         self.pg_start()
 121
 122         rx = self.pg0.get_capture(1)
 123         rx = rx[0]
 124
 125         self.assertFalse(rx.haslayer(IPv6))
 126         self.assertEqual(rx[IP].src, p[IP].src)
 127         self.assertEqual(rx[IP].dst, p[IP].dst)
 128
 129         #
 130         # Pre-resolve. No API for this!!
 131         #
 132         self.vapi.ppcli("map params pre-resolve ip6-nh 4001::1")
 133
 134         self.send_and_assert_no_replies(self.pg0, v4,
 135                                         "resovled via default route")
 136
 137         #
 138         # Add a route to 4001::1. Expect the encapped traffic to be
 139         # sent via that routes next-hop
 140         #
 141         pre_res_route = VppIpRoute(self,
 142                                    "4001::1",
 143                                    128,
 144                                    [VppRoutePath(self.pg1.remote_hosts[2].ip6,
 145                                                  self.pg1.sw_if_index,
 146                                                  is_ip6=1)],
 147                                    is_ip6=1)
 148         pre_res_route.add_vpp_config()
 149
 150         self.send_and_assert_encapped(v4, map_src,
 151                                       "2001::c0a8:0:0",
 152                                       dmac=self.pg1.remote_hosts[2].mac)
 153
 154         #
 155         # change the route to the pre-solved next-hop
 156         #
 157         pre_res_route1 = VppIpRoute(self,
 158                                     "4001::1",
 159                                     128,
 160                                     [VppRoutePath(self.pg1.remote_hosts[3].ip6,
 161                                                   self.pg1.sw_if_index,
 162                                                   is_ip6=1)],
 163                                     is_ip6=1)
 164         pre_res_route1.add_vpp_config()
 165
 166         self.send_and_assert_encapped(v4, map_src,
 167                                       "2001::c0a8:0:0",
 168                                       dmac=self.pg1.remote_hosts[3].mac)
 169
 170 if __name__ == '__main__':
 171     unittest.main(testRunner=VppTestRunner)