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#!/usr/bin/env python
import unittest
from framework import VppTestCase, VppTestRunner
from vpp_ip import DpoProto
from vpp_ip_route import VppIpRoute, VppRoutePath
from scapy.layers.l2 import Ether, Raw
from scapy.layers.inet import IP, UDP, ICMP, TCP, fragment
from scapy.layers.inet6 import IPv6, ICMPv6TimeExceeded
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_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,
proto=DpoProto.DPO_PROTO_IP6)],
is_ip6=1)
map_route.add_vpp_config()
#
# Add a domain that maps from pg0 to pg1
#
map_dst = '2001::/64'
map_src = '3000::1/128'
client_pfx = '192.168.0.0/16'
self.vapi.map_add_domain(map_dst, map_src, client_pfx)
# Enable MAP on interface.
self.vapi.map_if_enable_disable(1, self.pg0.sw_if_index, 0)
# Ensure MAP doesn't steal all packets!
v4 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
IP(src=self.pg0.remote_ip4, dst=self.pg0.remote_ip4) /
UDP(sport=20000, dport=10000) /
Raw('\xa5' * 100))
rx = self.send_and_expect(self.pg0, v4*1, self.pg0)
v4_reply = v4[1]
v4_reply.ttl -= 1
for p in rx:
self.validate(p[1], v4_reply)
#
# 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, "3000::1", "2001::c0a8:0:0")
# Enable MAP on interface.
self.vapi.map_if_enable_disable(1, self.pg1.sw_if_index, 0)
# Ensure MAP doesn't steal all packets
v6 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
IPv6(src=self.pg1.remote_ip6, dst=self.pg1.remote_ip6) /
UDP(sport=20000, dport=10000) /
Raw('\xa5' * 100))
rx = self.send_and_expect(self.pg1, v6*1, self.pg1)
v6_reply = v6[1]
v6_reply.hlim -= 1
for p in rx:
self.validate(p[1], v6_reply)
#
# 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='3000::1', 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,
proto=DpoProto.DPO_PROTO_IP6)],
is_ip6=1)
pre_res_route.add_vpp_config()
self.send_and_assert_encapped(v4, "3000::1",
"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,
proto=DpoProto.DPO_PROTO_IP6)])
pre_res_route.add_vpp_config()
self.send_and_assert_encapped(v4, "3000::1",
"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")
def validate(self, rx, expected):
self.assertEqual(rx, expected.__class__(str(expected)))
def payload(self, len):
return 'x' * len
def test_map_t(self):
""" MAP-T """
#
# Add a domain that maps from pg0 to pg1
#
map_dst = '2001:db8::/32'
map_src = '1234:5678:90ab:cdef::/64'
ip4_pfx = '192.168.0.0/24'
self.vapi.map_add_domain(map_dst, map_src, ip4_pfx,
16, 6, 4)
# Enable MAP-T on interfaces.
self.vapi.map_if_enable_disable(1, self.pg0.sw_if_index, 1)
self.vapi.map_if_enable_disable(1, self.pg1.sw_if_index, 1)
# Ensure MAP doesn't steal all packets!
v4 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
IP(src=self.pg0.remote_ip4, dst=self.pg0.remote_ip4) /
UDP(sport=20000, dport=10000) /
Raw('\xa5' * 100))
rx = self.send_and_expect(self.pg0, v4*1, self.pg0)
v4_reply = v4[1]
v4_reply.ttl -= 1
for p in rx:
self.validate(p[1], v4_reply)
# Ensure MAP doesn't steal all packets
v6 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
IPv6(src=self.pg1.remote_ip6, dst=self.pg1.remote_ip6) /
UDP(sport=20000, dport=10000) /
Raw('\xa5' * 100))
rx = self.send_and_expect(self.pg1, v6*1, self.pg1)
v6_reply = v6[1]
v6_reply.hlim -= 1
for p in rx:
self.validate(p[1], v6_reply)
map_route = VppIpRoute(self,
"2001:db8::",
32,
[VppRoutePath(self.pg1.remote_ip6,
self.pg1.sw_if_index,
proto=DpoProto.DPO_PROTO_IP6)],
is_ip6=1)
map_route.add_vpp_config()
#
# Send a v4 packet that will be translated
#
p_ether = Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac)
p_ip4 = IP(src=self.pg0.remote_ip4, dst='192.168.0.1')
payload = TCP(sport=0xabcd, dport=0xabcd)
p4 = (p_ether / p_ip4 / payload)
p6_translated = (IPv6(src="1234:5678:90ab:cdef:ac:1001:200:0",
dst="2001:db8:1f0::c0a8:1:f") / payload)
p6_translated.hlim -= 1
rx = self.send_and_expect(self.pg0, p4*1, self.pg1)
for p in rx:
self.validate(p[1], p6_translated)
# Send back an IPv6 packet that will be "untranslated"
p_ether6 = Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac)
p_ip6 = IPv6(src='2001:db8:1f0::c0a8:1:f',
dst='1234:5678:90ab:cdef:ac:1001:200:0')
p6 = (p_ether6 / p_ip6 / payload)
p4_translated = (IP(src='192.168.0.1',
dst=self.pg0.remote_ip4) / payload)
p4_translated.id = 0
p4_translated.ttl -= 1
rx = self.send_and_expect(self.pg1, p6*1, self.pg0)
for p in rx:
self.validate(p[1], p4_translated)
# IPv4 TTL
ip4_ttl_expired = IP(src=self.pg0.remote_ip4, dst='192.168.0.1', ttl=0)
p4 = (p_ether / ip4_ttl_expired / payload)
icmp4_reply = (IP(id=0, ttl=254, src=self.pg0.local_ip4,
dst=self.pg0.remote_ip4) /
ICMP(type='time-exceeded',
code='ttl-zero-during-transit') /
IP(src=self.pg0.remote_ip4,
dst='192.168.0.1', ttl=0) / payload)
rx = self.send_and_expect(self.pg0, p4*1, self.pg0)
for p in rx:
self.validate(p[1], icmp4_reply)
'''
This one is broken, cause it would require hairpinning...
# IPv4 TTL TTL1
ip4_ttl_expired = IP(src=self.pg0.remote_ip4, dst='192.168.0.1', ttl=1)
p4 = (p_ether / ip4_ttl_expired / payload)
icmp4_reply = IP(id=0, ttl=254, src=self.pg0.local_ip4,
dst=self.pg0.remote_ip4) / \
ICMP(type='time-exceeded', code='ttl-zero-during-transit' ) / \
IP(src=self.pg0.remote_ip4, dst='192.168.0.1', ttl=0) / payload
rx = self.send_and_expect(self.pg0, p4*1, self.pg0)
for p in rx:
self.validate(p[1], icmp4_reply)
'''
# IPv6 Hop limit
ip6_hlim_expired = IPv6(hlim=0, src='2001:db8:1ab::c0a8:1:ab',
dst='1234:5678:90ab:cdef:ac:1001:200:0')
p6 = (p_ether6 / ip6_hlim_expired / payload)
icmp6_reply = (IPv6(hlim=255, src=self.pg1.local_ip6,
dst="2001:db8:1ab::c0a8:1:ab") /
ICMPv6TimeExceeded(code=0) /
IPv6(src="2001:db8:1ab::c0a8:1:ab",
dst='1234:5678:90ab:cdef:ac:1001:200:0',
hlim=0) / payload)
rx = self.send_and_expect(self.pg1, p6*1, self.pg1)
for p in rx:
self.validate(p[1], icmp6_reply)
# IPv4 Well-known port
p_ip4 = IP(src=self.pg0.remote_ip4, dst='192.168.0.1')
payload = UDP(sport=200, dport=200)
p4 = (p_ether / p_ip4 / payload)
self.send_and_assert_no_replies(self.pg0, p4*1)
# IPv6 Well-known port
payload = UDP(sport=200, dport=200)
p6 = (p_ether6 / p_ip6 / payload)
self.send_and_assert_no_replies(self.pg1, p6*1)
# Packet fragmentation
payload = UDP(sport=40000, dport=4000) / self.payload(1453)
p4 = (p_ether / p_ip4 / payload)
self.pg_enable_capture()
self.pg0.add_stream(p4)
self.pg_start()
rx = self.pg1.get_capture(2)
for p in rx:
pass
# TODO: Manual validation
# self.validate(p[1], icmp4_reply)
# Packet fragmentation send fragments
payload = UDP(sport=40000, dport=4000) / self.payload(1453)
p4 = (p_ether / p_ip4 / payload)
frags = fragment(p4, fragsize=1000)
self.pg_enable_capture()
self.pg0.add_stream(frags)
self.pg_start()
rx = self.pg1.get_capture(2)
for p in rx:
pass
# p.show2()
# reass_pkt = reassemble(rx)
# p4_reply.ttl -= 1
# p4_reply.id = 256
# self.validate(reass_pkt, p4_reply)
# TCP MSS clamping
self.vapi.map_param_set_tcp(1300)
#
# Send a v4 TCP SYN packet that will be translated and MSS clamped
#
p_ether = Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac)
p_ip4 = IP(src=self.pg0.remote_ip4, dst='192.168.0.1')
payload = TCP(sport=0xabcd, dport=0xabcd, flags="S",
options=[('MSS', 1460)])
p4 = (p_ether / p_ip4 / payload)
p6_translated = (IPv6(src="1234:5678:90ab:cdef:ac:1001:200:0",
dst="2001:db8:1f0::c0a8:1:f") / payload)
p6_translated.hlim -= 1
p6_translated['TCP'].options = [('MSS', 1300)]
rx = self.send_and_expect(self.pg0, p4*1, self.pg1)
for p in rx:
self.validate(p[1], p6_translated)
# Send back an IPv6 packet that will be "untranslated"
p_ether6 = Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac)
p_ip6 = IPv6(src='2001:db8:1f0::c0a8:1:f',
dst='1234:5678:90ab:cdef:ac:1001:200:0')
p6 = (p_ether6 / p_ip6 / payload)
p4_translated = (IP(src='192.168.0.1',
dst=self.pg0.remote_ip4) / payload)
p4_translated.id = 0
p4_translated.ttl -= 1
p4_translated['TCP'].options = [('MSS', 1300)]
rx = self.send_and_expect(self.pg1, p6*1, self.pg0)
for p in rx:
self.validate(p[1], p4_translated)
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)
|
