5 from framework import VppTestCase, VppTestRunner
6 from vpp_ip import DpoProto
7 from vpp_ip_route import VppIpRoute, VppRoutePath
10 from scapy.layers.l2 import Ether, Raw
11 from scapy.layers.inet import IP, UDP, ICMP, TCP, fragment
12 from scapy.layers.inet6 import IPv6, ICMPv6TimeExceeded
15 class TestMAP(VppTestCase):
19 super(TestMAP, self).setUp()
21 # create 2 pg interfaces
22 self.create_pg_interfaces(range(4))
24 # pg0 is 'inside' IPv4
27 self.pg0.resolve_arp()
29 # pg1 is 'outside' IPv6
32 self.pg1.generate_remote_hosts(4)
33 self.pg1.configure_ipv6_neighbors()
36 super(TestMAP, self).tearDown()
37 for i in self.pg_interfaces:
42 def send_and_assert_encapped(self, tx, ip6_src, ip6_dst, dmac=None):
44 dmac = self.pg1.remote_mac
46 self.pg0.add_stream(tx)
48 self.pg_enable_capture(self.pg_interfaces)
51 rx = self.pg1.get_capture(1)
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)
63 # Add a route to the MAP-BR
67 map_route = VppIpRoute(self,
70 [VppRoutePath(self.pg1.remote_ip6,
72 proto=DpoProto.DPO_PROTO_IP6)],
74 map_route.add_vpp_config()
77 # Add a domain that maps from pg0 to pg1
80 map_src = '3000::1/128'
81 client_pfx = '192.168.0.0/16'
82 self.vapi.map_add_domain(map_dst, client_pfx, map_src)
84 # Enable MAP on interface.
85 self.vapi.map_if_enable_disable(is_enable=1,
86 sw_if_index=self.pg0.sw_if_index,
89 # Ensure MAP doesn't steal all packets!
90 v4 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
91 IP(src=self.pg0.remote_ip4, dst=self.pg0.remote_ip4) /
92 UDP(sport=20000, dport=10000) /
94 rx = self.send_and_expect(self.pg0, v4*1, self.pg0)
98 self.validate(p[1], v4_reply)
101 # Fire in a v4 packet that will be encapped to the BR
103 v4 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
104 IP(src=self.pg0.remote_ip4, dst='192.168.1.1') /
105 UDP(sport=20000, dport=10000) /
108 self.send_and_assert_encapped(v4, "3000::1", "2001::c0a8:0:0")
110 # Enable MAP on interface.
111 self.vapi.map_if_enable_disable(is_enable=1,
112 sw_if_index=self.pg1.sw_if_index,
115 # Ensure MAP doesn't steal all packets
116 v6 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
117 IPv6(src=self.pg1.remote_ip6, dst=self.pg1.remote_ip6) /
118 UDP(sport=20000, dport=10000) /
120 rx = self.send_and_expect(self.pg1, v6*1, self.pg1)
124 self.validate(p[1], v6_reply)
127 # Fire in a V6 encapped packet.
128 # expect a decapped packet on the inside ip4 link
130 p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
131 IPv6(dst='3000::1', src="2001::1") /
132 IP(dst=self.pg0.remote_ip4, src='192.168.1.1') /
133 UDP(sport=20000, dport=10000) /
136 self.pg1.add_stream(p)
138 self.pg_enable_capture(self.pg_interfaces)
141 rx = self.pg0.get_capture(1)
144 self.assertFalse(rx.haslayer(IPv6))
145 self.assertEqual(rx[IP].src, p[IP].src)
146 self.assertEqual(rx[IP].dst, p[IP].dst)
149 # Pre-resolve. No API for this!!
151 self.vapi.ppcli("map params pre-resolve ip6-nh 4001::1")
153 self.send_and_assert_no_replies(self.pg0, v4,
154 "resolved via default route")
157 # Add a route to 4001::1. Expect the encapped traffic to be
158 # sent via that routes next-hop
160 pre_res_route = VppIpRoute(
161 self, "4001::1", 128,
162 [VppRoutePath(self.pg1.remote_hosts[2].ip6,
163 self.pg1.sw_if_index,
164 proto=DpoProto.DPO_PROTO_IP6)],
166 pre_res_route.add_vpp_config()
168 self.send_and_assert_encapped(v4, "3000::1",
170 dmac=self.pg1.remote_hosts[2].mac)
173 # change the route to the pre-solved next-hop
175 pre_res_route.modify([VppRoutePath(self.pg1.remote_hosts[3].ip6,
176 self.pg1.sw_if_index,
177 proto=DpoProto.DPO_PROTO_IP6)])
178 pre_res_route.add_vpp_config()
180 self.send_and_assert_encapped(v4, "3000::1",
182 dmac=self.pg1.remote_hosts[3].mac)
185 # cleanup. The test infra's object registry will ensure
186 # the route is really gone and thus that the unresolve worked.
188 pre_res_route.remove_vpp_config()
189 self.vapi.ppcli("map params pre-resolve del ip6-nh 4001::1")
191 def validate(self, rx, expected):
192 self.assertEqual(rx, expected.__class__(scapy.compat.raw(expected)))
194 def payload(self, len):
197 def test_map_t(self):
201 # Add a domain that maps from pg0 to pg1
203 map_dst = '2001:db8::/32'
204 map_src = '1234:5678:90ab:cdef::/64'
205 ip4_pfx = '192.168.0.0/24'
207 self.vapi.map_add_domain(map_dst, ip4_pfx, map_src,
210 # Enable MAP-T on interfaces.
211 self.vapi.map_if_enable_disable(is_enable=1,
212 sw_if_index=self.pg0.sw_if_index,
214 self.vapi.map_if_enable_disable(is_enable=1,
215 sw_if_index=self.pg1.sw_if_index,
218 # Ensure MAP doesn't steal all packets!
219 v4 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
220 IP(src=self.pg0.remote_ip4, dst=self.pg0.remote_ip4) /
221 UDP(sport=20000, dport=10000) /
223 rx = self.send_and_expect(self.pg0, v4*1, self.pg0)
227 self.validate(p[1], v4_reply)
228 # Ensure MAP doesn't steal all packets
229 v6 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
230 IPv6(src=self.pg1.remote_ip6, dst=self.pg1.remote_ip6) /
231 UDP(sport=20000, dport=10000) /
233 rx = self.send_and_expect(self.pg1, v6*1, self.pg1)
237 self.validate(p[1], v6_reply)
239 map_route = VppIpRoute(self,
242 [VppRoutePath(self.pg1.remote_ip6,
243 self.pg1.sw_if_index,
244 proto=DpoProto.DPO_PROTO_IP6)],
246 map_route.add_vpp_config()
249 # Send a v4 packet that will be translated
251 p_ether = Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac)
252 p_ip4 = IP(src=self.pg0.remote_ip4, dst='192.168.0.1')
253 payload = TCP(sport=0xabcd, dport=0xabcd)
255 p4 = (p_ether / p_ip4 / payload)
256 p6_translated = (IPv6(src="1234:5678:90ab:cdef:ac:1001:200:0",
257 dst="2001:db8:1f0::c0a8:1:f") / payload)
258 p6_translated.hlim -= 1
259 rx = self.send_and_expect(self.pg0, p4*1, self.pg1)
261 self.validate(p[1], p6_translated)
263 # Send back an IPv6 packet that will be "untranslated"
264 p_ether6 = Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac)
265 p_ip6 = IPv6(src='2001:db8:1f0::c0a8:1:f',
266 dst='1234:5678:90ab:cdef:ac:1001:200:0')
267 p6 = (p_ether6 / p_ip6 / payload)
268 p4_translated = (IP(src='192.168.0.1',
269 dst=self.pg0.remote_ip4) / payload)
271 p4_translated.ttl -= 1
272 rx = self.send_and_expect(self.pg1, p6*1, self.pg0)
274 self.validate(p[1], p4_translated)
277 ip4_ttl_expired = IP(src=self.pg0.remote_ip4, dst='192.168.0.1', ttl=0)
278 p4 = (p_ether / ip4_ttl_expired / payload)
280 icmp4_reply = (IP(id=0, ttl=254, src=self.pg0.local_ip4,
281 dst=self.pg0.remote_ip4) /
282 ICMP(type='time-exceeded',
283 code='ttl-zero-during-transit') /
284 IP(src=self.pg0.remote_ip4,
285 dst='192.168.0.1', ttl=0) / payload)
286 rx = self.send_and_expect(self.pg0, p4*1, self.pg0)
288 self.validate(p[1], icmp4_reply)
291 This one is broken, cause it would require hairpinning...
293 ip4_ttl_expired = IP(src=self.pg0.remote_ip4, dst='192.168.0.1', ttl=1)
294 p4 = (p_ether / ip4_ttl_expired / payload)
296 icmp4_reply = IP(id=0, ttl=254, src=self.pg0.local_ip4,
297 dst=self.pg0.remote_ip4) / \
298 ICMP(type='time-exceeded', code='ttl-zero-during-transit' ) / \
299 IP(src=self.pg0.remote_ip4, dst='192.168.0.1', ttl=0) / payload
300 rx = self.send_and_expect(self.pg0, p4*1, self.pg0)
302 self.validate(p[1], icmp4_reply)
306 ip6_hlim_expired = IPv6(hlim=0, src='2001:db8:1ab::c0a8:1:ab',
307 dst='1234:5678:90ab:cdef:ac:1001:200:0')
308 p6 = (p_ether6 / ip6_hlim_expired / payload)
310 icmp6_reply = (IPv6(hlim=255, src=self.pg1.local_ip6,
311 dst="2001:db8:1ab::c0a8:1:ab") /
312 ICMPv6TimeExceeded(code=0) /
313 IPv6(src="2001:db8:1ab::c0a8:1:ab",
314 dst='1234:5678:90ab:cdef:ac:1001:200:0',
316 rx = self.send_and_expect(self.pg1, p6*1, self.pg1)
318 self.validate(p[1], icmp6_reply)
320 # IPv4 Well-known port
321 p_ip4 = IP(src=self.pg0.remote_ip4, dst='192.168.0.1')
322 payload = UDP(sport=200, dport=200)
323 p4 = (p_ether / p_ip4 / payload)
324 self.send_and_assert_no_replies(self.pg0, p4*1)
326 # IPv6 Well-known port
327 payload = UDP(sport=200, dport=200)
328 p6 = (p_ether6 / p_ip6 / payload)
329 self.send_and_assert_no_replies(self.pg1, p6*1)
331 # Packet fragmentation
332 payload = UDP(sport=40000, dport=4000) / self.payload(1453)
333 p4 = (p_ether / p_ip4 / payload)
334 self.pg_enable_capture()
335 self.pg0.add_stream(p4)
337 rx = self.pg1.get_capture(2)
340 # TODO: Manual validation
341 # self.validate(p[1], icmp4_reply)
343 # Packet fragmentation send fragments
344 payload = UDP(sport=40000, dport=4000) / self.payload(1453)
345 p4 = (p_ether / p_ip4 / payload)
346 frags = fragment(p4, fragsize=1000)
347 self.pg_enable_capture()
348 self.pg0.add_stream(frags)
350 rx = self.pg1.get_capture(2)
354 # reass_pkt = reassemble(rx)
357 # self.validate(reass_pkt, p4_reply)
360 self.vapi.map_param_set_tcp(1300)
363 # Send a v4 TCP SYN packet that will be translated and MSS clamped
365 p_ether = Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac)
366 p_ip4 = IP(src=self.pg0.remote_ip4, dst='192.168.0.1')
367 payload = TCP(sport=0xabcd, dport=0xabcd, flags="S",
368 options=[('MSS', 1460)])
370 p4 = (p_ether / p_ip4 / payload)
371 p6_translated = (IPv6(src="1234:5678:90ab:cdef:ac:1001:200:0",
372 dst="2001:db8:1f0::c0a8:1:f") / payload)
373 p6_translated.hlim -= 1
374 p6_translated[TCP].options = [('MSS', 1300)]
375 rx = self.send_and_expect(self.pg0, p4*1, self.pg1)
377 self.validate(p[1], p6_translated)
379 # Send back an IPv6 packet that will be "untranslated"
380 p_ether6 = Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac)
381 p_ip6 = IPv6(src='2001:db8:1f0::c0a8:1:f',
382 dst='1234:5678:90ab:cdef:ac:1001:200:0')
383 p6 = (p_ether6 / p_ip6 / payload)
384 p4_translated = (IP(src='192.168.0.1',
385 dst=self.pg0.remote_ip4) / payload)
387 p4_translated.ttl -= 1
388 p4_translated[TCP].options = [('MSS', 1300)]
389 rx = self.send_and_expect(self.pg1, p6*1, self.pg0)
391 self.validate(p[1], p4_translated)
394 if __name__ == '__main__':
395 unittest.main(testRunner=VppTestRunner)