4 from framework import VppTestCase, VppTestRunner
5 from vpp_sub_interface import VppDot1QSubint
6 from vpp_ip_route import VppIpRoute, VppRoutePath
7 from vpp_papi_provider import L2_VTR_OP
9 from scapy.packet import Raw
10 from scapy.layers.l2 import Ether, Dot1Q
11 from scapy.layers.inet import IP, UDP
12 from socket import AF_INET, inet_pton
15 class TestDVR(VppTestCase):
16 """ Distributed Virtual Router """
19 super(TestDVR, self).setUp()
21 self.create_pg_interfaces(range(4))
22 self.create_loopback_interfaces(1)
24 for i in self.pg_interfaces:
27 self.loop0.config_ip4()
30 for i in self.pg_interfaces:
32 self.loop0.unconfig_ip4()
34 super(TestDVR, self).tearDown()
36 def assert_same_mac_addr(self, tx, rx):
40 self.assertEqual(t_eth.src, r_eth.src)
41 self.assertEqual(t_eth.dst, r_eth.dst)
43 def assert_has_vlan_tag(self, tag, rx):
46 self.assertEqual(tag, r_1q.vlan)
48 def assert_has_no_tag(self, rx):
50 self.assertFalse(p.haslayer(Dot1Q))
53 """ Distributed Virtual Router """
56 # A packet destined to an IP address that is L2 bridged via
59 ip_non_tag_bridged = "10.10.10.10"
60 ip_tag_bridged = "10.10.10.11"
61 any_src_addr = "1.1.1.1"
63 pkt_no_tag = (Ether(src=self.pg0.remote_mac,
64 dst=self.loop0.local_mac) /
66 dst=ip_non_tag_bridged) /
67 UDP(sport=1234, dport=1234) /
69 pkt_tag = (Ether(src=self.pg0.remote_mac,
70 dst=self.loop0.local_mac) /
73 UDP(sport=1234, dport=1234) /
77 # Two sub-interfaces so we can test VLAN tag push/pop
79 sub_if_on_pg2 = VppDot1QSubint(self, self.pg2, 92)
80 sub_if_on_pg3 = VppDot1QSubint(self, self.pg3, 93)
81 sub_if_on_pg2.admin_up()
82 sub_if_on_pg3.admin_up()
85 # Put all the interfaces into a new bridge domain
87 self.vapi.sw_interface_set_l2_bridge(self.pg0.sw_if_index, 1)
88 self.vapi.sw_interface_set_l2_bridge(self.pg1.sw_if_index, 1)
89 self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg2.sw_if_index, 1)
90 self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg3.sw_if_index, 1)
91 self.vapi.sw_interface_set_l2_bridge(self.loop0.sw_if_index, 1, bvi=1)
93 self.vapi.sw_interface_set_l2_tag_rewrite(sub_if_on_pg2.sw_if_index,
96 self.vapi.sw_interface_set_l2_tag_rewrite(sub_if_on_pg3.sw_if_index,
101 # Add routes to bridge the traffic via a tagged an nontagged interface
103 route_no_tag = VppIpRoute(
104 self, ip_non_tag_bridged, 32,
105 [VppRoutePath("0.0.0.0",
106 self.pg1.sw_if_index,
108 route_no_tag.add_vpp_config()
111 # Inject the packet that arrives and leaves on a non-tagged interface
112 # Since it's 'bridged' expect that the MAC headed is unchanged.
114 rx = self.send_and_expect(self.pg0, pkt_no_tag * 65, self.pg1)
115 self.assert_same_mac_addr(pkt_no_tag, rx)
116 self.assert_has_no_tag(rx)
119 # Add routes to bridge the traffic via a tagged interface
121 route_with_tag = VppIpRoute(
122 self, ip_tag_bridged, 32,
123 [VppRoutePath("0.0.0.0",
124 sub_if_on_pg3.sw_if_index,
126 route_with_tag.add_vpp_config()
129 # Inject the packet that arrives non-tag and leaves on a tagged
132 rx = self.send_and_expect(self.pg0, pkt_tag * 65, self.pg3)
133 self.assert_same_mac_addr(pkt_tag, rx)
134 self.assert_has_vlan_tag(93, rx)
139 pkt_tag_to_tag = (Ether(src=self.pg2.remote_mac,
140 dst=self.loop0.local_mac) /
143 dst=ip_tag_bridged) /
144 UDP(sport=1234, dport=1234) /
147 rx = self.send_and_expect(self.pg2, pkt_tag_to_tag * 65, self.pg3)
148 self.assert_same_mac_addr(pkt_tag_to_tag, rx)
149 self.assert_has_vlan_tag(93, rx)
154 pkt_tag_to_non_tag = (Ether(src=self.pg2.remote_mac,
155 dst=self.loop0.local_mac) /
158 dst=ip_non_tag_bridged) /
159 UDP(sport=1234, dport=1234) /
162 rx = self.send_and_expect(self.pg2, pkt_tag_to_non_tag * 65, self.pg1)
163 self.assert_same_mac_addr(pkt_tag_to_tag, rx)
164 self.assert_has_no_tag(rx)
167 # Add an output L3 ACL that will block the traffic
169 rule_1 = ({'is_permit': 0,
172 'srcport_or_icmptype_first': 1234,
173 'srcport_or_icmptype_last': 1234,
174 'src_ip_prefix_len': 32,
175 'src_ip_addr': inet_pton(AF_INET, any_src_addr),
176 'dstport_or_icmpcode_first': 1234,
177 'dstport_or_icmpcode_last': 1234,
178 'dst_ip_prefix_len': 32,
179 'dst_ip_addr': inet_pton(AF_INET, ip_non_tag_bridged)})
180 acl = self.vapi.acl_add_replace(acl_index=4294967295,
184 # Apply the ACL on the output interface
186 self.vapi.acl_interface_set_acl_list(self.pg1.sw_if_index,
191 # Send packet's that should match the ACL and be dropped
193 rx = self.send_and_assert_no_replies(self.pg2, pkt_tag_to_non_tag * 65)
198 self.vapi.acl_interface_set_acl_list(self.pg1.sw_if_index,
200 self.vapi.acl_del(acl.acl_index)
202 self.vapi.sw_interface_set_l2_bridge(self.pg0.sw_if_index, 1,
204 self.vapi.sw_interface_set_l2_bridge(self.pg1.sw_if_index, 1,
206 self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg2.sw_if_index,
208 self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg3.sw_if_index,
210 self.vapi.sw_interface_set_l2_bridge(self.loop0.sw_if_index,
214 # Do a FIB dump to make sure the paths are correctly reported as DVR
216 routes = self.vapi.ip_fib_dump()
219 if (inet_pton(AF_INET, ip_tag_bridged) == r.address):
220 self.assertEqual(r.path[0].sw_if_index,
221 sub_if_on_pg3.sw_if_index)
222 self.assertEqual(r.path[0].is_dvr, 1)
223 if (inet_pton(AF_INET, ip_non_tag_bridged) == r.address):
224 self.assertEqual(r.path[0].sw_if_index,
225 self.pg1.sw_if_index)
226 self.assertEqual(r.path[0].is_dvr, 1)
229 # the explicit route delete is require so it happens before
230 # the sbu-interface delete. subinterface delete is required
231 # because that object type does not use the object registry
233 route_no_tag.remove_vpp_config()
234 route_with_tag.remove_vpp_config()
235 sub_if_on_pg3.remove_vpp_config()
236 sub_if_on_pg2.remove_vpp_config()
238 def test_l2_emulation(self):
242 # non distinct L3 packets, in the tag/non-tag combos
244 pkt_no_tag = (Ether(src=self.pg0.remote_mac,
245 dst=self.pg1.remote_mac) /
248 UDP(sport=1234, dport=1234) /
250 pkt_to_tag = (Ether(src=self.pg0.remote_mac,
251 dst=self.pg2.remote_mac) /
254 UDP(sport=1234, dport=1234) /
256 pkt_from_tag = (Ether(src=self.pg3.remote_mac,
257 dst=self.pg2.remote_mac) /
261 UDP(sport=1234, dport=1234) /
263 pkt_from_to_tag = (Ether(src=self.pg3.remote_mac,
264 dst=self.pg2.remote_mac) /
268 UDP(sport=1234, dport=1234) /
270 pkt_bcast = (Ether(src=self.pg0.remote_mac,
271 dst="ff:ff:ff:ff:ff:ff") /
273 dst="255.255.255.255") /
274 UDP(sport=1234, dport=1234) /
278 # A couple of sub-interfaces for tags
280 sub_if_on_pg2 = VppDot1QSubint(self, self.pg2, 92)
281 sub_if_on_pg3 = VppDot1QSubint(self, self.pg3, 93)
282 sub_if_on_pg2.admin_up()
283 sub_if_on_pg3.admin_up()
286 # Put all the interfaces into a new bridge domain
288 self.vapi.sw_interface_set_l2_bridge(self.pg0.sw_if_index, 1)
289 self.vapi.sw_interface_set_l2_bridge(self.pg1.sw_if_index, 1)
290 self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg2.sw_if_index, 1)
291 self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg3.sw_if_index, 1)
292 self.vapi.sw_interface_set_l2_tag_rewrite(sub_if_on_pg2.sw_if_index,
295 self.vapi.sw_interface_set_l2_tag_rewrite(sub_if_on_pg3.sw_if_index,
300 # Disable UU flooding, learning and ARP terminaation. makes this test
301 # easier as unicast packets are dropped if not extracted.
303 self.vapi.bridge_flags(1, 0, (1 << 0) | (1 << 3) | (1 << 4))
306 # Add a DVR route to steer traffic at L3
308 route_1 = VppIpRoute(self, "1.1.1.1", 32,
309 [VppRoutePath("0.0.0.0",
310 self.pg1.sw_if_index,
312 route_2 = VppIpRoute(self, "1.1.1.2", 32,
313 [VppRoutePath("0.0.0.0",
314 sub_if_on_pg2.sw_if_index,
316 route_1.add_vpp_config()
317 route_2.add_vpp_config()
320 # packets are dropped because bridge does not flood unknown unicast
322 self.send_and_assert_no_replies(self.pg0, pkt_no_tag)
325 # Enable L3 extraction on pgs
327 self.vapi.sw_interface_set_l2_emulation(self.pg0.sw_if_index)
328 self.vapi.sw_interface_set_l2_emulation(self.pg1.sw_if_index)
329 self.vapi.sw_interface_set_l2_emulation(sub_if_on_pg2.sw_if_index)
330 self.vapi.sw_interface_set_l2_emulation(sub_if_on_pg3.sw_if_index)
333 # now we expect the packet forward according to the DVR route
335 rx = self.send_and_expect(self.pg0, pkt_no_tag * 65, self.pg1)
336 self.assert_same_mac_addr(pkt_no_tag, rx)
337 self.assert_has_no_tag(rx)
339 rx = self.send_and_expect(self.pg0, pkt_to_tag * 65, self.pg2)
340 self.assert_same_mac_addr(pkt_to_tag, rx)
341 self.assert_has_vlan_tag(92, rx)
343 rx = self.send_and_expect(self.pg3, pkt_from_tag * 65, self.pg1)
344 self.assert_same_mac_addr(pkt_from_tag, rx)
345 self.assert_has_no_tag(rx)
347 rx = self.send_and_expect(self.pg3, pkt_from_to_tag * 65, self.pg2)
348 self.assert_same_mac_addr(pkt_from_tag, rx)
349 self.assert_has_vlan_tag(92, rx)
352 # but broadcast packets are still flooded
354 self.send_and_expect(self.pg0, pkt_bcast * 33, self.pg2)
359 self.vapi.sw_interface_set_l2_emulation(self.pg0.sw_if_index,
361 self.vapi.sw_interface_set_l2_emulation(self.pg1.sw_if_index,
363 self.vapi.sw_interface_set_l2_emulation(sub_if_on_pg2.sw_if_index,
365 self.vapi.sw_interface_set_l2_emulation(sub_if_on_pg3.sw_if_index,
368 self.vapi.sw_interface_set_l2_bridge(self.pg0.sw_if_index,
370 self.vapi.sw_interface_set_l2_bridge(self.pg1.sw_if_index,
372 self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg2.sw_if_index,
374 self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg3.sw_if_index,
377 route_1.remove_vpp_config()
378 route_2.remove_vpp_config()
379 sub_if_on_pg3.remove_vpp_config()
380 sub_if_on_pg2.remove_vpp_config()
383 if __name__ == '__main__':
384 unittest.main(testRunner=VppTestRunner)