5 from framework import VppTestCase, VppTestRunner
6 from vpp_ip import DpoProto
7 from vpp_ip_route import VppIpRoute, VppRoutePath
8 from scapy.layers.l2 import Ether, Raw
9 from scapy.layers.inet import IP, UDP, ICMP, TCP, fragment
10 from scapy.layers.inet6 import IPv6, ICMPv6TimeExceeded
13 class TestMAP(VppTestCase):
17 super(TestMAP, self).setUp()
19 # create 2 pg interfaces
20 self.create_pg_interfaces(range(4))
22 # pg0 is 'inside' IPv4
25 self.pg0.resolve_arp()
27 # pg1 is 'outside' IPv6
30 self.pg1.generate_remote_hosts(4)
31 self.pg1.configure_ipv6_neighbors()
34 super(TestMAP, self).tearDown()
35 for i in self.pg_interfaces:
40 def send_and_assert_encapped(self, tx, ip6_src, ip6_dst, dmac=None):
42 dmac = self.pg1.remote_mac
44 self.pg0.add_stream(tx)
46 self.pg_enable_capture(self.pg_interfaces)
49 rx = self.pg1.get_capture(1)
52 self.assertEqual(rx[Ether].dst, dmac)
53 self.assertEqual(rx[IP].src, tx[IP].src)
54 self.assertEqual(rx[IPv6].src, ip6_src)
55 self.assertEqual(rx[IPv6].dst, ip6_dst)
61 # Add a route to the MAP-BR
65 map_route = VppIpRoute(self,
68 [VppRoutePath(self.pg1.remote_ip6,
70 proto=DpoProto.DPO_PROTO_IP6)],
72 map_route.add_vpp_config()
75 # Add a domain that maps from pg0 to pg1
78 map_src = '3000::1/128'
79 client_pfx = '192.168.0.0/16'
80 self.vapi.map_add_domain(map_dst, client_pfx, map_src)
82 # Enable MAP on interface.
83 self.vapi.map_if_enable_disable(is_enable=1,
84 sw_if_index=self.pg0.sw_if_index,
87 # Ensure MAP doesn't steal all packets!
88 v4 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
89 IP(src=self.pg0.remote_ip4, dst=self.pg0.remote_ip4) /
90 UDP(sport=20000, dport=10000) /
92 rx = self.send_and_expect(self.pg0, v4*1, self.pg0)
96 self.validate(p[1], v4_reply)
99 # Fire in a v4 packet that will be encapped to the BR
101 v4 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
102 IP(src=self.pg0.remote_ip4, dst='192.168.1.1') /
103 UDP(sport=20000, dport=10000) /
106 self.send_and_assert_encapped(v4, "3000::1", "2001::c0a8:0:0")
108 # Enable MAP on interface.
109 self.vapi.map_if_enable_disable(is_enable=1,
110 sw_if_index=self.pg1.sw_if_index,
113 # Ensure MAP doesn't steal all packets
114 v6 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
115 IPv6(src=self.pg1.remote_ip6, dst=self.pg1.remote_ip6) /
116 UDP(sport=20000, dport=10000) /
118 rx = self.send_and_expect(self.pg1, v6*1, self.pg1)
122 self.validate(p[1], v6_reply)
125 # Fire in a V6 encapped packet.
126 # expect a decapped packet on the inside ip4 link
128 p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
129 IPv6(dst='3000::1', src="2001::1") /
130 IP(dst=self.pg0.remote_ip4, src='192.168.1.1') /
131 UDP(sport=20000, dport=10000) /
134 self.pg1.add_stream(p)
136 self.pg_enable_capture(self.pg_interfaces)
139 rx = self.pg0.get_capture(1)
142 self.assertFalse(rx.haslayer(IPv6))
143 self.assertEqual(rx[IP].src, p[IP].src)
144 self.assertEqual(rx[IP].dst, p[IP].dst)
147 # Pre-resolve. No API for this!!
149 self.vapi.ppcli("map params pre-resolve ip6-nh 4001::1")
151 self.send_and_assert_no_replies(self.pg0, v4,
152 "resovled via default route")
155 # Add a route to 4001::1. Expect the encapped traffic to be
156 # sent via that routes next-hop
158 pre_res_route = VppIpRoute(
159 self, "4001::1", 128,
160 [VppRoutePath(self.pg1.remote_hosts[2].ip6,
161 self.pg1.sw_if_index,
162 proto=DpoProto.DPO_PROTO_IP6)],
164 pre_res_route.add_vpp_config()
166 self.send_and_assert_encapped(v4, "3000::1",
168 dmac=self.pg1.remote_hosts[2].mac)
171 # change the route to the pre-solved next-hop
173 pre_res_route.modify([VppRoutePath(self.pg1.remote_hosts[3].ip6,
174 self.pg1.sw_if_index,
175 proto=DpoProto.DPO_PROTO_IP6)])
176 pre_res_route.add_vpp_config()
178 self.send_and_assert_encapped(v4, "3000::1",
180 dmac=self.pg1.remote_hosts[3].mac)
183 # cleanup. The test infra's object registry will ensure
184 # the route is really gone and thus that the unresolve worked.
186 pre_res_route.remove_vpp_config()
187 self.vapi.ppcli("map params pre-resolve del ip6-nh 4001::1")
189 def validate(self, rx, expected):
190 self.assertEqual(rx, expected.__class__(str(expected)))
192 def payload(self, len):
195 def test_map_t(self):
199 # Add a domain that maps from pg0 to pg1
201 map_dst = '2001:db8::/32'
202 map_src = '1234:5678:90ab:cdef::/64'
203 ip4_pfx = '192.168.0.0/24'
205 self.vapi.map_add_domain(map_dst, ip4_pfx, map_src,
208 # Enable MAP-T on interfaces.
209 self.vapi.map_if_enable_disable(is_enable=1,
210 sw_if_index=self.pg0.sw_if_index,
212 self.vapi.map_if_enable_disable(is_enable=1,
213 sw_if_index=self.pg1.sw_if_index,
216 # Ensure MAP doesn't steal all packets!
217 v4 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
218 IP(src=self.pg0.remote_ip4, dst=self.pg0.remote_ip4) /
219 UDP(sport=20000, dport=10000) /
221 rx = self.send_and_expect(self.pg0, v4*1, self.pg0)
225 self.validate(p[1], v4_reply)
226 # Ensure MAP doesn't steal all packets
227 v6 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
228 IPv6(src=self.pg1.remote_ip6, dst=self.pg1.remote_ip6) /
229 UDP(sport=20000, dport=10000) /
231 rx = self.send_and_expect(self.pg1, v6*1, self.pg1)
235 self.validate(p[1], v6_reply)
237 map_route = VppIpRoute(self,
240 [VppRoutePath(self.pg1.remote_ip6,
241 self.pg1.sw_if_index,
242 proto=DpoProto.DPO_PROTO_IP6)],
244 map_route.add_vpp_config()
247 # Send a v4 packet that will be translated
249 p_ether = Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac)
250 p_ip4 = IP(src=self.pg0.remote_ip4, dst='192.168.0.1')
251 payload = TCP(sport=0xabcd, dport=0xabcd)
253 p4 = (p_ether / p_ip4 / payload)
254 p6_translated = (IPv6(src="1234:5678:90ab:cdef:ac:1001:200:0",
255 dst="2001:db8:1f0::c0a8:1:f") / payload)
256 p6_translated.hlim -= 1
257 rx = self.send_and_expect(self.pg0, p4*1, self.pg1)
259 self.validate(p[1], p6_translated)
261 # Send back an IPv6 packet that will be "untranslated"
262 p_ether6 = Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac)
263 p_ip6 = IPv6(src='2001:db8:1f0::c0a8:1:f',
264 dst='1234:5678:90ab:cdef:ac:1001:200:0')
265 p6 = (p_ether6 / p_ip6 / payload)
266 p4_translated = (IP(src='192.168.0.1',
267 dst=self.pg0.remote_ip4) / payload)
269 p4_translated.ttl -= 1
270 rx = self.send_and_expect(self.pg1, p6*1, self.pg0)
272 self.validate(p[1], p4_translated)
275 ip4_ttl_expired = IP(src=self.pg0.remote_ip4, dst='192.168.0.1', ttl=0)
276 p4 = (p_ether / ip4_ttl_expired / payload)
278 icmp4_reply = (IP(id=0, ttl=254, src=self.pg0.local_ip4,
279 dst=self.pg0.remote_ip4) /
280 ICMP(type='time-exceeded',
281 code='ttl-zero-during-transit') /
282 IP(src=self.pg0.remote_ip4,
283 dst='192.168.0.1', ttl=0) / payload)
284 rx = self.send_and_expect(self.pg0, p4*1, self.pg0)
286 self.validate(p[1], icmp4_reply)
289 This one is broken, cause it would require hairpinning...
291 ip4_ttl_expired = IP(src=self.pg0.remote_ip4, dst='192.168.0.1', ttl=1)
292 p4 = (p_ether / ip4_ttl_expired / payload)
294 icmp4_reply = IP(id=0, ttl=254, src=self.pg0.local_ip4,
295 dst=self.pg0.remote_ip4) / \
296 ICMP(type='time-exceeded', code='ttl-zero-during-transit' ) / \
297 IP(src=self.pg0.remote_ip4, dst='192.168.0.1', ttl=0) / payload
298 rx = self.send_and_expect(self.pg0, p4*1, self.pg0)
300 self.validate(p[1], icmp4_reply)
304 ip6_hlim_expired = IPv6(hlim=0, src='2001:db8:1ab::c0a8:1:ab',
305 dst='1234:5678:90ab:cdef:ac:1001:200:0')
306 p6 = (p_ether6 / ip6_hlim_expired / payload)
308 icmp6_reply = (IPv6(hlim=255, src=self.pg1.local_ip6,
309 dst="2001:db8:1ab::c0a8:1:ab") /
310 ICMPv6TimeExceeded(code=0) /
311 IPv6(src="2001:db8:1ab::c0a8:1:ab",
312 dst='1234:5678:90ab:cdef:ac:1001:200:0',
314 rx = self.send_and_expect(self.pg1, p6*1, self.pg1)
316 self.validate(p[1], icmp6_reply)
318 # IPv4 Well-known port
319 p_ip4 = IP(src=self.pg0.remote_ip4, dst='192.168.0.1')
320 payload = UDP(sport=200, dport=200)
321 p4 = (p_ether / p_ip4 / payload)
322 self.send_and_assert_no_replies(self.pg0, p4*1)
324 # IPv6 Well-known port
325 payload = UDP(sport=200, dport=200)
326 p6 = (p_ether6 / p_ip6 / payload)
327 self.send_and_assert_no_replies(self.pg1, p6*1)
329 # Packet fragmentation
330 payload = UDP(sport=40000, dport=4000) / self.payload(1453)
331 p4 = (p_ether / p_ip4 / payload)
332 self.pg_enable_capture()
333 self.pg0.add_stream(p4)
335 rx = self.pg1.get_capture(2)
338 # TODO: Manual validation
339 # self.validate(p[1], icmp4_reply)
341 # Packet fragmentation send fragments
342 payload = UDP(sport=40000, dport=4000) / self.payload(1453)
343 p4 = (p_ether / p_ip4 / payload)
344 frags = fragment(p4, fragsize=1000)
345 self.pg_enable_capture()
346 self.pg0.add_stream(frags)
348 rx = self.pg1.get_capture(2)
352 # reass_pkt = reassemble(rx)
355 # self.validate(reass_pkt, p4_reply)
358 self.vapi.map_param_set_tcp(1300)
361 # Send a v4 TCP SYN packet that will be translated and MSS clamped
363 p_ether = Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac)
364 p_ip4 = IP(src=self.pg0.remote_ip4, dst='192.168.0.1')
365 payload = TCP(sport=0xabcd, dport=0xabcd, flags="S",
366 options=[('MSS', 1460)])
368 p4 = (p_ether / p_ip4 / payload)
369 p6_translated = (IPv6(src="1234:5678:90ab:cdef:ac:1001:200:0",
370 dst="2001:db8:1f0::c0a8:1:f") / payload)
371 p6_translated.hlim -= 1
372 p6_translated['TCP'].options = [('MSS', 1300)]
373 rx = self.send_and_expect(self.pg0, p4*1, self.pg1)
375 self.validate(p[1], p6_translated)
377 # Send back an IPv6 packet that will be "untranslated"
378 p_ether6 = Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac)
379 p_ip6 = IPv6(src='2001:db8:1f0::c0a8:1:f',
380 dst='1234:5678:90ab:cdef:ac:1001:200:0')
381 p6 = (p_ether6 / p_ip6 / payload)
382 p4_translated = (IP(src='192.168.0.1',
383 dst=self.pg0.remote_ip4) / payload)
385 p4_translated.ttl -= 1
386 p4_translated['TCP'].options = [('MSS', 1300)]
387 rx = self.send_and_expect(self.pg1, p6*1, self.pg0)
389 self.validate(p[1], p4_translated)
392 if __name__ == '__main__':
393 unittest.main(testRunner=VppTestRunner)