4 from framework import VppTestCase, VppTestRunner
5 from vpp_ip_route import VppIpRoute, VppRoutePath
6 from vpp_l2 import L2_PORT_TYPE
7 from vpp_sub_interface import L2_VTR_OP, VppDot1QSubint
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
17 class TestDVR(VppTestCase):
18 """ Distributed Virtual Router """
22 super(TestDVR, cls).setUpClass()
25 def tearDownClass(cls):
26 super(TestDVR, cls).tearDownClass()
29 super(TestDVR, self).setUp()
31 self.create_pg_interfaces(range(4))
32 self.create_loopback_interfaces(1)
34 for i in self.pg_interfaces:
37 self.loop0.config_ip4()
40 for i in self.pg_interfaces:
42 self.loop0.unconfig_ip4()
44 super(TestDVR, self).tearDown()
46 def assert_same_mac_addr(self, tx, rx):
50 self.assertEqual(t_eth.src, r_eth.src)
51 self.assertEqual(t_eth.dst, r_eth.dst)
53 def assert_has_vlan_tag(self, tag, rx):
56 self.assertEqual(tag, r_1q.vlan)
58 def assert_has_no_tag(self, rx):
60 self.assertFalse(p.haslayer(Dot1Q))
63 """ Distributed Virtual Router """
66 # A packet destined to an IP address that is L2 bridged via
69 ip_non_tag_bridged = "10.10.10.10"
70 ip_tag_bridged = "10.10.10.11"
71 any_src_addr = "1.1.1.1"
73 pkt_no_tag = (Ether(src=self.pg0.remote_mac,
74 dst=self.loop0.local_mac) /
76 dst=ip_non_tag_bridged) /
77 UDP(sport=1234, dport=1234) /
79 pkt_tag = (Ether(src=self.pg0.remote_mac,
80 dst=self.loop0.local_mac) /
83 UDP(sport=1234, dport=1234) /
87 # Two sub-interfaces so we can test VLAN tag push/pop
89 sub_if_on_pg2 = VppDot1QSubint(self, self.pg2, 92)
90 sub_if_on_pg3 = VppDot1QSubint(self, self.pg3, 93)
91 sub_if_on_pg2.admin_up()
92 sub_if_on_pg3.admin_up()
95 # Put all the interfaces into a new bridge domain
97 self.vapi.sw_interface_set_l2_bridge(
98 rx_sw_if_index=self.pg0.sw_if_index, bd_id=1)
99 self.vapi.sw_interface_set_l2_bridge(
100 rx_sw_if_index=self.pg1.sw_if_index, bd_id=1)
101 self.vapi.sw_interface_set_l2_bridge(
102 rx_sw_if_index=sub_if_on_pg2.sw_if_index, bd_id=1)
103 self.vapi.sw_interface_set_l2_bridge(
104 rx_sw_if_index=sub_if_on_pg3.sw_if_index, bd_id=1)
105 self.vapi.sw_interface_set_l2_bridge(
106 rx_sw_if_index=self.loop0.sw_if_index, bd_id=1,
107 port_type=L2_PORT_TYPE.BVI)
109 self.vapi.l2_interface_vlan_tag_rewrite(
110 sw_if_index=sub_if_on_pg2.sw_if_index, vtr_op=L2_VTR_OP.L2_POP_1,
112 self.vapi.l2_interface_vlan_tag_rewrite(
113 sw_if_index=sub_if_on_pg3.sw_if_index, vtr_op=L2_VTR_OP.L2_POP_1,
117 # Add routes to bridge the traffic via a tagged an nontagged interface
119 route_no_tag = VppIpRoute(
120 self, ip_non_tag_bridged, 32,
121 [VppRoutePath("0.0.0.0",
122 self.pg1.sw_if_index,
124 route_no_tag.add_vpp_config()
127 # Inject the packet that arrives and leaves on a non-tagged interface
128 # Since it's 'bridged' expect that the MAC headed is unchanged.
130 rx = self.send_and_expect(self.pg0, pkt_no_tag * NUM_PKTS, self.pg1)
131 self.assert_same_mac_addr(pkt_no_tag, rx)
132 self.assert_has_no_tag(rx)
135 # Add routes to bridge the traffic via a tagged interface
137 route_with_tag = VppIpRoute(
138 self, ip_tag_bridged, 32,
139 [VppRoutePath("0.0.0.0",
140 sub_if_on_pg3.sw_if_index,
142 route_with_tag.add_vpp_config()
145 # Inject the packet that arrives non-tag and leaves on a tagged
148 rx = self.send_and_expect(self.pg0, pkt_tag * NUM_PKTS, self.pg3)
149 self.assert_same_mac_addr(pkt_tag, rx)
150 self.assert_has_vlan_tag(93, rx)
155 pkt_tag_to_tag = (Ether(src=self.pg2.remote_mac,
156 dst=self.loop0.local_mac) /
159 dst=ip_tag_bridged) /
160 UDP(sport=1234, dport=1234) /
163 rx = self.send_and_expect(self.pg2,
164 pkt_tag_to_tag * NUM_PKTS,
166 self.assert_same_mac_addr(pkt_tag_to_tag, rx)
167 self.assert_has_vlan_tag(93, rx)
172 pkt_tag_to_non_tag = (Ether(src=self.pg2.remote_mac,
173 dst=self.loop0.local_mac) /
176 dst=ip_non_tag_bridged) /
177 UDP(sport=1234, dport=1234) /
180 rx = self.send_and_expect(self.pg2,
181 pkt_tag_to_non_tag * NUM_PKTS,
183 self.assert_same_mac_addr(pkt_tag_to_tag, rx)
184 self.assert_has_no_tag(rx)
187 # Add an output L3 ACL that will block the traffic
189 rule_1 = ({'is_permit': 0,
192 'srcport_or_icmptype_first': 1234,
193 'srcport_or_icmptype_last': 1234,
194 'src_ip_prefix_len': 32,
195 'src_ip_addr': inet_pton(AF_INET, any_src_addr),
196 'dstport_or_icmpcode_first': 1234,
197 'dstport_or_icmpcode_last': 1234,
198 'dst_ip_prefix_len': 32,
199 'dst_ip_addr': inet_pton(AF_INET, ip_non_tag_bridged)})
200 acl = self.vapi.acl_add_replace(acl_index=4294967295,
204 # Apply the ACL on the output interface
206 self.vapi.acl_interface_set_acl_list(self.pg1.sw_if_index,
211 # Send packet's that should match the ACL and be dropped
213 rx = self.send_and_assert_no_replies(self.pg2,
214 pkt_tag_to_non_tag * NUM_PKTS)
219 self.vapi.acl_interface_set_acl_list(self.pg1.sw_if_index,
221 self.vapi.acl_del(acl.acl_index)
223 self.vapi.sw_interface_set_l2_bridge(
224 rx_sw_if_index=self.pg0.sw_if_index, bd_id=1, enable=0)
225 self.vapi.sw_interface_set_l2_bridge(
226 rx_sw_if_index=self.pg1.sw_if_index, bd_id=1, enable=0)
227 self.vapi.sw_interface_set_l2_bridge(
228 rx_sw_if_index=sub_if_on_pg2.sw_if_index, bd_id=1, enable=0)
229 self.vapi.sw_interface_set_l2_bridge(
230 rx_sw_if_index=sub_if_on_pg3.sw_if_index, bd_id=1, enable=0)
231 self.vapi.sw_interface_set_l2_bridge(
232 rx_sw_if_index=self.loop0.sw_if_index, bd_id=1,
233 port_type=L2_PORT_TYPE.BVI, enable=0)
236 # Do a FIB dump to make sure the paths are correctly reported as DVR
238 routes = self.vapi.ip_fib_dump()
241 if (inet_pton(AF_INET, ip_tag_bridged) == r.address):
242 self.assertEqual(r.path[0].sw_if_index,
243 sub_if_on_pg3.sw_if_index)
244 self.assertEqual(r.path[0].is_dvr, 1)
245 if (inet_pton(AF_INET, ip_non_tag_bridged) == r.address):
246 self.assertEqual(r.path[0].sw_if_index,
247 self.pg1.sw_if_index)
248 self.assertEqual(r.path[0].is_dvr, 1)
251 # the explicit route delete is require so it happens before
252 # the sbu-interface delete. subinterface delete is required
253 # because that object type does not use the object registry
255 route_no_tag.remove_vpp_config()
256 route_with_tag.remove_vpp_config()
257 sub_if_on_pg3.remove_vpp_config()
258 sub_if_on_pg2.remove_vpp_config()
260 def test_l2_emulation(self):
264 # non distinct L3 packets, in the tag/non-tag combos
266 pkt_no_tag = (Ether(src=self.pg0.remote_mac,
267 dst=self.pg1.remote_mac) /
270 UDP(sport=1234, dport=1234) /
272 pkt_to_tag = (Ether(src=self.pg0.remote_mac,
273 dst=self.pg2.remote_mac) /
276 UDP(sport=1234, dport=1234) /
278 pkt_from_tag = (Ether(src=self.pg3.remote_mac,
279 dst=self.pg2.remote_mac) /
283 UDP(sport=1234, dport=1234) /
285 pkt_from_to_tag = (Ether(src=self.pg3.remote_mac,
286 dst=self.pg2.remote_mac) /
290 UDP(sport=1234, dport=1234) /
292 pkt_bcast = (Ether(src=self.pg0.remote_mac,
293 dst="ff:ff:ff:ff:ff:ff") /
295 dst="255.255.255.255") /
296 UDP(sport=1234, dport=1234) /
300 # A couple of sub-interfaces for tags
302 sub_if_on_pg2 = VppDot1QSubint(self, self.pg2, 92)
303 sub_if_on_pg3 = VppDot1QSubint(self, self.pg3, 93)
304 sub_if_on_pg2.admin_up()
305 sub_if_on_pg3.admin_up()
308 # Put all the interfaces into a new bridge domain
310 self.vapi.sw_interface_set_l2_bridge(
311 rx_sw_if_index=self.pg0.sw_if_index, bd_id=1)
312 self.vapi.sw_interface_set_l2_bridge(
313 rx_sw_if_index=self.pg1.sw_if_index, bd_id=1)
314 self.vapi.sw_interface_set_l2_bridge(
315 rx_sw_if_index=sub_if_on_pg2.sw_if_index, bd_id=1)
316 self.vapi.sw_interface_set_l2_bridge(
317 rx_sw_if_index=sub_if_on_pg3.sw_if_index, bd_id=1)
318 self.vapi.l2_interface_vlan_tag_rewrite(
319 sw_if_index=sub_if_on_pg2.sw_if_index, vtr_op=L2_VTR_OP.L2_POP_1,
321 self.vapi.l2_interface_vlan_tag_rewrite(
322 sw_if_index=sub_if_on_pg3.sw_if_index, vtr_op=L2_VTR_OP.L2_POP_1,
326 # Disable UU flooding, learning and ARP termination. makes this test
327 # easier as unicast packets are dropped if not extracted.
329 self.vapi.bridge_flags(bd_id=1, is_set=0,
330 flags=(1 << 0) | (1 << 3) | (1 << 4))
333 # Add a DVR route to steer traffic at L3
335 route_1 = VppIpRoute(self, "1.1.1.1", 32,
336 [VppRoutePath("0.0.0.0",
337 self.pg1.sw_if_index,
339 route_2 = VppIpRoute(self, "1.1.1.2", 32,
340 [VppRoutePath("0.0.0.0",
341 sub_if_on_pg2.sw_if_index,
343 route_1.add_vpp_config()
344 route_2.add_vpp_config()
347 # packets are dropped because bridge does not flood unknown unicast
349 self.send_and_assert_no_replies(self.pg0, pkt_no_tag)
352 # Enable L3 extraction on pgs
354 self.vapi.l2_emulation(self.pg0.sw_if_index)
355 self.vapi.l2_emulation(self.pg1.sw_if_index)
356 self.vapi.l2_emulation(sub_if_on_pg2.sw_if_index)
357 self.vapi.l2_emulation(sub_if_on_pg3.sw_if_index)
360 # now we expect the packet forward according to the DVR route
362 rx = self.send_and_expect(self.pg0, pkt_no_tag * NUM_PKTS, self.pg1)
363 self.assert_same_mac_addr(pkt_no_tag, rx)
364 self.assert_has_no_tag(rx)
366 rx = self.send_and_expect(self.pg0, pkt_to_tag * NUM_PKTS, self.pg2)
367 self.assert_same_mac_addr(pkt_to_tag, rx)
368 self.assert_has_vlan_tag(92, rx)
370 rx = self.send_and_expect(self.pg3, pkt_from_tag * NUM_PKTS, self.pg1)
371 self.assert_same_mac_addr(pkt_from_tag, rx)
372 self.assert_has_no_tag(rx)
374 rx = self.send_and_expect(self.pg3,
375 pkt_from_to_tag * NUM_PKTS,
377 self.assert_same_mac_addr(pkt_from_tag, rx)
378 self.assert_has_vlan_tag(92, rx)
381 # but broadcast packets are still flooded
383 self.send_and_expect(self.pg0, pkt_bcast * 33, self.pg2)
388 self.vapi.l2_emulation(self.pg0.sw_if_index,
390 self.vapi.l2_emulation(self.pg1.sw_if_index,
392 self.vapi.l2_emulation(sub_if_on_pg2.sw_if_index,
394 self.vapi.l2_emulation(sub_if_on_pg3.sw_if_index,
397 self.vapi.sw_interface_set_l2_bridge(
398 rx_sw_if_index=self.pg0.sw_if_index, bd_id=1, enable=0)
399 self.vapi.sw_interface_set_l2_bridge(
400 rx_sw_if_index=self.pg1.sw_if_index, bd_id=1, enable=0)
401 self.vapi.sw_interface_set_l2_bridge(
402 rx_sw_if_index=sub_if_on_pg2.sw_if_index, bd_id=1, enable=0)
403 self.vapi.sw_interface_set_l2_bridge(
404 rx_sw_if_index=sub_if_on_pg3.sw_if_index, bd_id=1, enable=0)
406 route_1.remove_vpp_config()
407 route_2.remove_vpp_config()
408 sub_if_on_pg3.remove_vpp_config()
409 sub_if_on_pg2.remove_vpp_config()
412 if __name__ == '__main__':
413 unittest.main(testRunner=VppTestRunner)