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#!/usr/bin/env python
import unittest
import socket
from framework import VppTestCase, VppTestRunner
from vpp_ip_route import VppIpRoute, VppRoutePath
from scapy.layers.l2 import Ether, Raw
from scapy.layers.inet import IP, UDP, ICMP
from scapy.layers.inet6 import IPv6
class TestMAP(VppTestCase):
""" MAP Test Case """
def setUp(self):
super(TestMAP, self).setUp()
# create 2 pg interfaces
self.create_pg_interfaces(range(4))
# pg0 is 'inside' IPv4
self.pg0.admin_up()
self.pg0.config_ip4()
self.pg0.resolve_arp()
# pg1 is 'outside' IPv6
self.pg1.admin_up()
self.pg1.config_ip6()
self.pg1.generate_remote_hosts(4)
self.pg1.configure_ipv6_neighbors()
def tearDown(self):
super(TestMAP, self).tearDown()
for i in self.pg_interfaces:
i.unconfig_ip4()
i.unconfig_ip6()
i.admin_down()
def send_and_assert_no_replies(self, intf, pkts, remark):
intf.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
for i in self.pg_interfaces:
i.assert_nothing_captured(remark=remark)
def send_and_assert_encapped(self, tx, ip6_src, ip6_dst, dmac=None):
if not dmac:
dmac = self.pg1.remote_mac
self.pg0.add_stream(tx)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg1.get_capture(1)
rx = rx[0]
self.assertEqual(rx[Ether].dst, dmac)
self.assertEqual(rx[IP].src, tx[IP].src)
self.assertEqual(rx[IPv6].src, ip6_src)
self.assertEqual(rx[IPv6].dst, ip6_dst)
def test_map_e(self):
""" MAP-E """
#
# Add a route to the MAP-BR
#
map_br_pfx = "2001::"
map_br_pfx_len = 64
map_route = VppIpRoute(self,
map_br_pfx,
map_br_pfx_len,
[VppRoutePath(self.pg1.remote_ip6,
self.pg1.sw_if_index,
is_ip6=1)],
is_ip6=1)
map_route.add_vpp_config()
#
# Add a domain that maps from pg0 to pg1
#
map_dst = socket.inet_pton(socket.AF_INET6, map_br_pfx)
map_src = "3001::1"
map_src_n = socket.inet_pton(socket.AF_INET6, map_src)
client_pfx = socket.inet_pton(socket.AF_INET, "192.168.0.0")
self.vapi.map_add_domain(map_dst,
map_br_pfx_len,
map_src_n,
128,
client_pfx,
16)
#
# Fire in a v4 packet that will be encapped to the BR
#
v4 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
IP(src=self.pg0.remote_ip4, dst='192.168.1.1') /
UDP(sport=20000, dport=10000) /
Raw('\xa5' * 100))
self.send_and_assert_encapped(v4, map_src, "2001::c0a8:0:0")
#
# Fire in a V6 encapped packet.
# expect a decapped packet on the inside ip4 link
#
p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
IPv6(dst=map_src, src="2001::1") /
IP(dst=self.pg0.remote_ip4, src='192.168.1.1') /
UDP(sport=20000, dport=10000) /
Raw('\xa5' * 100))
self.pg1.add_stream(p)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg0.get_capture(1)
rx = rx[0]
self.assertFalse(rx.haslayer(IPv6))
self.assertEqual(rx[IP].src, p[IP].src)
self.assertEqual(rx[IP].dst, p[IP].dst)
#
# Pre-resolve. No API for this!!
#
self.vapi.ppcli("map params pre-resolve ip6-nh 4001::1")
self.send_and_assert_no_replies(self.pg0, v4,
"resovled via default route")
#
# Add a route to 4001::1. Expect the encapped traffic to be
# sent via that routes next-hop
#
pre_res_route = VppIpRoute(self,
"4001::1",
128,
[VppRoutePath(self.pg1.remote_hosts[2].ip6,
self.pg1.sw_if_index,
is_ip6=1)],
is_ip6=1)
pre_res_route.add_vpp_config()
self.send_and_assert_encapped(v4, map_src,
"2001::c0a8:0:0",
dmac=self.pg1.remote_hosts[2].mac)
#
# change the route to the pre-solved next-hop
#
pre_res_route.modify([VppRoutePath(self.pg1.remote_hosts[3].ip6,
self.pg1.sw_if_index,
is_ip6=1)])
pre_res_route.add_vpp_config()
self.send_and_assert_encapped(v4, map_src,
"2001::c0a8:0:0",
dmac=self.pg1.remote_hosts[3].mac)
#
# cleanup. The test infra's object registry will ensure
# the route is really gone and thus that the unresolve worked.
#
pre_res_route.remove_vpp_config()
self.vapi.ppcli("map params pre-resolve del ip6-nh 4001::1")
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)
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