6 from framework import VppTestCase, VppTestRunner
8 from vpp_ip_route import VppIpRoute, VppRoutePath
9 from ipaddress import IPv6Network, IPv4Network
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, map_src, client_pfx)
84 # Enable MAP on interface.
85 self.vapi.map_if_enable_disable(1, self.pg0.sw_if_index, 0)
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(1, self.pg1.sw_if_index, 0)
111 # Ensure MAP doesn't steal all packets
112 v6 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
113 IPv6(src=self.pg1.remote_ip6, dst=self.pg1.remote_ip6) /
114 UDP(sport=20000, dport=10000) /
116 rx = self.send_and_expect(self.pg1, v6*1, self.pg1)
120 self.validate(p[1], v6_reply)
123 # Fire in a V6 encapped packet.
124 # expect a decapped packet on the inside ip4 link
126 p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
127 IPv6(dst='3000::1', src="2001::1") /
128 IP(dst=self.pg0.remote_ip4, src='192.168.1.1') /
129 UDP(sport=20000, dport=10000) /
132 self.pg1.add_stream(p)
134 self.pg_enable_capture(self.pg_interfaces)
137 rx = self.pg0.get_capture(1)
140 self.assertFalse(rx.haslayer(IPv6))
141 self.assertEqual(rx[IP].src, p[IP].src)
142 self.assertEqual(rx[IP].dst, p[IP].dst)
145 # Pre-resolve. No API for this!!
147 self.vapi.ppcli("map params pre-resolve ip6-nh 4001::1")
149 self.send_and_assert_no_replies(self.pg0, v4,
150 "resovled via default route")
153 # Add a route to 4001::1. Expect the encapped traffic to be
154 # sent via that routes next-hop
156 pre_res_route = VppIpRoute(
157 self, "4001::1", 128,
158 [VppRoutePath(self.pg1.remote_hosts[2].ip6,
159 self.pg1.sw_if_index,
160 proto=DpoProto.DPO_PROTO_IP6)],
162 pre_res_route.add_vpp_config()
164 self.send_and_assert_encapped(v4, "3000::1",
166 dmac=self.pg1.remote_hosts[2].mac)
169 # change the route to the pre-solved next-hop
171 pre_res_route.modify([VppRoutePath(self.pg1.remote_hosts[3].ip6,
172 self.pg1.sw_if_index,
173 proto=DpoProto.DPO_PROTO_IP6)])
174 pre_res_route.add_vpp_config()
176 self.send_and_assert_encapped(v4, "3000::1",
178 dmac=self.pg1.remote_hosts[3].mac)
181 # cleanup. The test infra's object registry will ensure
182 # the route is really gone and thus that the unresolve worked.
184 pre_res_route.remove_vpp_config()
185 self.vapi.ppcli("map params pre-resolve del ip6-nh 4001::1")
187 def validate(self, rx, expected):
188 self.assertEqual(rx, expected.__class__(str(expected)))
190 def payload(self, len):
193 def test_map_t(self):
197 # Add a domain that maps from pg0 to pg1
199 map_dst = '2001:db8::/32'
200 map_src = '1234:5678:90ab:cdef::/64'
201 ip4_pfx = '192.168.0.0/24'
203 self.vapi.map_add_domain(map_dst, map_src, ip4_pfx,
206 # Enable MAP-T on interfaces.
207 self.vapi.map_if_enable_disable(1, self.pg0.sw_if_index, 1)
208 self.vapi.map_if_enable_disable(1, self.pg1.sw_if_index, 1)
210 # Ensure MAP doesn't steal all packets!
211 v4 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
212 IP(src=self.pg0.remote_ip4, dst=self.pg0.remote_ip4) /
213 UDP(sport=20000, dport=10000) /
215 rx = self.send_and_expect(self.pg0, v4*1, self.pg0)
219 self.validate(p[1], v4_reply)
220 # Ensure MAP doesn't steal all packets
221 v6 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
222 IPv6(src=self.pg1.remote_ip6, dst=self.pg1.remote_ip6) /
223 UDP(sport=20000, dport=10000) /
225 rx = self.send_and_expect(self.pg1, v6*1, self.pg1)
229 self.validate(p[1], v6_reply)
231 map_route = VppIpRoute(self,
234 [VppRoutePath(self.pg1.remote_ip6,
235 self.pg1.sw_if_index,
236 proto=DpoProto.DPO_PROTO_IP6)],
238 map_route.add_vpp_config()
241 # Send a v4 packet that will be translated
243 p_ether = Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac)
244 p_ip4 = IP(src=self.pg0.remote_ip4, dst='192.168.0.1')
245 payload = TCP(sport=0xabcd, dport=0xabcd)
247 p4 = (p_ether / p_ip4 / payload)
248 p6_translated = (IPv6(src="1234:5678:90ab:cdef:ac:1001:200:0",
249 dst="2001:db8:1f0::c0a8:1:f") / payload)
250 p6_translated.hlim -= 1
251 rx = self.send_and_expect(self.pg0, p4*1, self.pg1)
253 self.validate(p[1], p6_translated)
255 # Send back an IPv6 packet that will be "untranslated"
256 p_ether6 = Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac)
257 p_ip6 = IPv6(src='2001:db8:1f0::c0a8:1:f',
258 dst='1234:5678:90ab:cdef:ac:1001:200:0')
259 p6 = (p_ether6 / p_ip6 / payload)
260 p4_translated = (IP(src='192.168.0.1',
261 dst=self.pg0.remote_ip4) / payload)
263 p4_translated.ttl -= 1
264 rx = self.send_and_expect(self.pg1, p6*1, self.pg0)
266 self.validate(p[1], p4_translated)
269 ip4_ttl_expired = IP(src=self.pg0.remote_ip4, dst='192.168.0.1', ttl=0)
270 p4 = (p_ether / ip4_ttl_expired / payload)
272 icmp4_reply = (IP(id=0, ttl=254, src=self.pg0.local_ip4,
273 dst=self.pg0.remote_ip4) /
274 ICMP(type='time-exceeded',
275 code='ttl-zero-during-transit') /
276 IP(src=self.pg0.remote_ip4,
277 dst='192.168.0.1', ttl=0) / payload)
278 rx = self.send_and_expect(self.pg0, p4*1, self.pg0)
280 self.validate(p[1], icmp4_reply)
283 This one is broken, cause it would require hairpinning...
285 ip4_ttl_expired = IP(src=self.pg0.remote_ip4, dst='192.168.0.1', ttl=1)
286 p4 = (p_ether / ip4_ttl_expired / payload)
288 icmp4_reply = IP(id=0, ttl=254, src=self.pg0.local_ip4,
289 dst=self.pg0.remote_ip4) / \
290 ICMP(type='time-exceeded', code='ttl-zero-during-transit' ) / \
291 IP(src=self.pg0.remote_ip4, dst='192.168.0.1', ttl=0) / payload
292 rx = self.send_and_expect(self.pg0, p4*1, self.pg0)
294 self.validate(p[1], icmp4_reply)
298 ip6_hlim_expired = IPv6(hlim=0, src='2001:db8:1ab::c0a8:1:ab',
299 dst='1234:5678:90ab:cdef:ac:1001:200:0')
300 p6 = (p_ether6 / ip6_hlim_expired / payload)
302 icmp6_reply = (IPv6(hlim=255, src=self.pg1.local_ip6,
303 dst="2001:db8:1ab::c0a8:1:ab") /
304 ICMPv6TimeExceeded(code=0) /
305 IPv6(src="2001:db8:1ab::c0a8:1:ab",
306 dst='1234:5678:90ab:cdef:ac:1001:200:0',
308 rx = self.send_and_expect(self.pg1, p6*1, self.pg1)
310 self.validate(p[1], icmp6_reply)
312 # IPv4 Well-known port
313 p_ip4 = IP(src=self.pg0.remote_ip4, dst='192.168.0.1')
314 payload = UDP(sport=200, dport=200)
315 p4 = (p_ether / p_ip4 / payload)
316 self.send_and_assert_no_replies(self.pg0, p4*1)
318 # IPv6 Well-known port
319 payload = UDP(sport=200, dport=200)
320 p6 = (p_ether6 / p_ip6 / payload)
321 self.send_and_assert_no_replies(self.pg1, p6*1)
323 # Packet fragmentation
324 payload = UDP(sport=40000, dport=4000) / self.payload(1453)
325 p4 = (p_ether / p_ip4 / payload)
326 self.pg_enable_capture()
327 self.pg0.add_stream(p4)
329 rx = self.pg1.get_capture(2)
332 # TODO: Manual validation
333 # self.validate(p[1], icmp4_reply)
335 # Packet fragmentation send fragments
336 payload = UDP(sport=40000, dport=4000) / self.payload(1453)
337 p4 = (p_ether / p_ip4 / payload)
338 frags = fragment(p4, fragsize=1000)
339 self.pg_enable_capture()
340 self.pg0.add_stream(frags)
342 rx = self.pg1.get_capture(2)
346 # reass_pkt = reassemble(rx)
349 # self.validate(reass_pkt, p4_reply)
352 self.vapi.map_param_set_tcp(1300)
355 # Send a v4 TCP SYN packet that will be translated and MSS clamped
357 p_ether = Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac)
358 p_ip4 = IP(src=self.pg0.remote_ip4, dst='192.168.0.1')
359 payload = TCP(sport=0xabcd, dport=0xabcd, flags="S",
360 options=[('MSS', 1460)])
362 p4 = (p_ether / p_ip4 / payload)
363 p6_translated = (IPv6(src="1234:5678:90ab:cdef:ac:1001:200:0",
364 dst="2001:db8:1f0::c0a8:1:f") / payload)
365 p6_translated.hlim -= 1
366 p6_translated['TCP'].options = [('MSS', 1300)]
367 rx = self.send_and_expect(self.pg0, p4*1, self.pg1)
369 self.validate(p[1], p6_translated)
371 # Send back an IPv6 packet that will be "untranslated"
372 p_ether6 = Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac)
373 p_ip6 = IPv6(src='2001:db8:1f0::c0a8:1:f',
374 dst='1234:5678:90ab:cdef:ac:1001:200:0')
375 p6 = (p_ether6 / p_ip6 / payload)
376 p4_translated = (IP(src='192.168.0.1',
377 dst=self.pg0.remote_ip4) / payload)
379 p4_translated.ttl -= 1
380 p4_translated['TCP'].options = [('MSS', 1300)]
381 rx = self.send_and_expect(self.pg1, p6*1, self.pg0)
383 self.validate(p[1], p4_translated)
386 if __name__ == '__main__':
387 unittest.main(testRunner=VppTestRunner)