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, L2_PORT_TYPE
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,
92 port_type=L2_PORT_TYPE.BVI)
94 self.vapi.l2_interface_vlan_tag_rewrite(
95 sub_if_on_pg2.sw_if_index,
98 self.vapi.l2_interface_vlan_tag_rewrite(
99 sub_if_on_pg3.sw_if_index,
104 # Add routes to bridge the traffic via a tagged an nontagged interface
106 route_no_tag = VppIpRoute(
107 self, ip_non_tag_bridged, 32,
108 [VppRoutePath("0.0.0.0",
109 self.pg1.sw_if_index,
111 route_no_tag.add_vpp_config()
114 # Inject the packet that arrives and leaves on a non-tagged interface
115 # Since it's 'bridged' expect that the MAC headed is unchanged.
117 rx = self.send_and_expect(self.pg0, pkt_no_tag * 65, self.pg1)
118 self.assert_same_mac_addr(pkt_no_tag, rx)
119 self.assert_has_no_tag(rx)
122 # Add routes to bridge the traffic via a tagged interface
124 route_with_tag = VppIpRoute(
125 self, ip_tag_bridged, 32,
126 [VppRoutePath("0.0.0.0",
127 sub_if_on_pg3.sw_if_index,
129 route_with_tag.add_vpp_config()
132 # Inject the packet that arrives non-tag and leaves on a tagged
135 rx = self.send_and_expect(self.pg0, pkt_tag * 65, self.pg3)
136 self.assert_same_mac_addr(pkt_tag, rx)
137 self.assert_has_vlan_tag(93, rx)
142 pkt_tag_to_tag = (Ether(src=self.pg2.remote_mac,
143 dst=self.loop0.local_mac) /
146 dst=ip_tag_bridged) /
147 UDP(sport=1234, dport=1234) /
150 rx = self.send_and_expect(self.pg2, pkt_tag_to_tag * 65, self.pg3)
151 self.assert_same_mac_addr(pkt_tag_to_tag, rx)
152 self.assert_has_vlan_tag(93, rx)
157 pkt_tag_to_non_tag = (Ether(src=self.pg2.remote_mac,
158 dst=self.loop0.local_mac) /
161 dst=ip_non_tag_bridged) /
162 UDP(sport=1234, dport=1234) /
165 rx = self.send_and_expect(self.pg2, pkt_tag_to_non_tag * 65, self.pg1)
166 self.assert_same_mac_addr(pkt_tag_to_tag, rx)
167 self.assert_has_no_tag(rx)
170 # Add an output L3 ACL that will block the traffic
172 rule_1 = ({'is_permit': 0,
175 'srcport_or_icmptype_first': 1234,
176 'srcport_or_icmptype_last': 1234,
177 'src_ip_prefix_len': 32,
178 'src_ip_addr': inet_pton(AF_INET, any_src_addr),
179 'dstport_or_icmpcode_first': 1234,
180 'dstport_or_icmpcode_last': 1234,
181 'dst_ip_prefix_len': 32,
182 'dst_ip_addr': inet_pton(AF_INET, ip_non_tag_bridged)})
183 acl = self.vapi.acl_add_replace(acl_index=4294967295,
187 # Apply the ACL on the output interface
189 self.vapi.acl_interface_set_acl_list(self.pg1.sw_if_index,
194 # Send packet's that should match the ACL and be dropped
196 rx = self.send_and_assert_no_replies(self.pg2, pkt_tag_to_non_tag * 65)
201 self.vapi.acl_interface_set_acl_list(self.pg1.sw_if_index,
203 self.vapi.acl_del(acl.acl_index)
205 self.vapi.sw_interface_set_l2_bridge(self.pg0.sw_if_index, 1,
207 self.vapi.sw_interface_set_l2_bridge(self.pg1.sw_if_index, 1,
209 self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg2.sw_if_index,
211 self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg3.sw_if_index,
213 self.vapi.sw_interface_set_l2_bridge(self.loop0.sw_if_index,
214 1, port_type=L2_PORT_TYPE.BVI,
218 # Do a FIB dump to make sure the paths are correctly reported as DVR
220 routes = self.vapi.ip_fib_dump()
223 if (inet_pton(AF_INET, ip_tag_bridged) == r.address):
224 self.assertEqual(r.path[0].sw_if_index,
225 sub_if_on_pg3.sw_if_index)
226 self.assertEqual(r.path[0].is_dvr, 1)
227 if (inet_pton(AF_INET, ip_non_tag_bridged) == r.address):
228 self.assertEqual(r.path[0].sw_if_index,
229 self.pg1.sw_if_index)
230 self.assertEqual(r.path[0].is_dvr, 1)
233 # the explicit route delete is require so it happens before
234 # the sbu-interface delete. subinterface delete is required
235 # because that object type does not use the object registry
237 route_no_tag.remove_vpp_config()
238 route_with_tag.remove_vpp_config()
239 sub_if_on_pg3.remove_vpp_config()
240 sub_if_on_pg2.remove_vpp_config()
242 def test_l2_emulation(self):
246 # non distinct L3 packets, in the tag/non-tag combos
248 pkt_no_tag = (Ether(src=self.pg0.remote_mac,
249 dst=self.pg1.remote_mac) /
252 UDP(sport=1234, dport=1234) /
254 pkt_to_tag = (Ether(src=self.pg0.remote_mac,
255 dst=self.pg2.remote_mac) /
258 UDP(sport=1234, dport=1234) /
260 pkt_from_tag = (Ether(src=self.pg3.remote_mac,
261 dst=self.pg2.remote_mac) /
265 UDP(sport=1234, dport=1234) /
267 pkt_from_to_tag = (Ether(src=self.pg3.remote_mac,
268 dst=self.pg2.remote_mac) /
272 UDP(sport=1234, dport=1234) /
274 pkt_bcast = (Ether(src=self.pg0.remote_mac,
275 dst="ff:ff:ff:ff:ff:ff") /
277 dst="255.255.255.255") /
278 UDP(sport=1234, dport=1234) /
282 # A couple of sub-interfaces for tags
284 sub_if_on_pg2 = VppDot1QSubint(self, self.pg2, 92)
285 sub_if_on_pg3 = VppDot1QSubint(self, self.pg3, 93)
286 sub_if_on_pg2.admin_up()
287 sub_if_on_pg3.admin_up()
290 # Put all the interfaces into a new bridge domain
292 self.vapi.sw_interface_set_l2_bridge(self.pg0.sw_if_index, 1)
293 self.vapi.sw_interface_set_l2_bridge(self.pg1.sw_if_index, 1)
294 self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg2.sw_if_index, 1)
295 self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg3.sw_if_index, 1)
296 self.vapi.l2_interface_vlan_tag_rewrite(
297 sub_if_on_pg2.sw_if_index,
300 self.vapi.l2_interface_vlan_tag_rewrite(
301 sub_if_on_pg3.sw_if_index,
306 # Disable UU flooding, learning and ARP terminaation. makes this test
307 # easier as unicast packets are dropped if not extracted.
309 self.vapi.bridge_flags(1, 0, (1 << 0) | (1 << 3) | (1 << 4))
312 # Add a DVR route to steer traffic at L3
314 route_1 = VppIpRoute(self, "1.1.1.1", 32,
315 [VppRoutePath("0.0.0.0",
316 self.pg1.sw_if_index,
318 route_2 = VppIpRoute(self, "1.1.1.2", 32,
319 [VppRoutePath("0.0.0.0",
320 sub_if_on_pg2.sw_if_index,
322 route_1.add_vpp_config()
323 route_2.add_vpp_config()
326 # packets are dropped because bridge does not flood unknown unicast
328 self.send_and_assert_no_replies(self.pg0, pkt_no_tag)
331 # Enable L3 extraction on pgs
333 self.vapi.l2_emulation(self.pg0.sw_if_index)
334 self.vapi.l2_emulation(self.pg1.sw_if_index)
335 self.vapi.l2_emulation(sub_if_on_pg2.sw_if_index)
336 self.vapi.l2_emulation(sub_if_on_pg3.sw_if_index)
339 # now we expect the packet forward according to the DVR route
341 rx = self.send_and_expect(self.pg0, pkt_no_tag * 65, self.pg1)
342 self.assert_same_mac_addr(pkt_no_tag, rx)
343 self.assert_has_no_tag(rx)
345 rx = self.send_and_expect(self.pg0, pkt_to_tag * 65, self.pg2)
346 self.assert_same_mac_addr(pkt_to_tag, rx)
347 self.assert_has_vlan_tag(92, rx)
349 rx = self.send_and_expect(self.pg3, pkt_from_tag * 65, self.pg1)
350 self.assert_same_mac_addr(pkt_from_tag, rx)
351 self.assert_has_no_tag(rx)
353 rx = self.send_and_expect(self.pg3, pkt_from_to_tag * 65, self.pg2)
354 self.assert_same_mac_addr(pkt_from_tag, rx)
355 self.assert_has_vlan_tag(92, rx)
358 # but broadcast packets are still flooded
360 self.send_and_expect(self.pg0, pkt_bcast * 33, self.pg2)
365 self.vapi.l2_emulation(self.pg0.sw_if_index,
367 self.vapi.l2_emulation(self.pg1.sw_if_index,
369 self.vapi.l2_emulation(sub_if_on_pg2.sw_if_index,
371 self.vapi.l2_emulation(sub_if_on_pg3.sw_if_index,
374 self.vapi.sw_interface_set_l2_bridge(self.pg0.sw_if_index,
376 self.vapi.sw_interface_set_l2_bridge(self.pg1.sw_if_index,
378 self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg2.sw_if_index,
380 self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg3.sw_if_index,
383 route_1.remove_vpp_config()
384 route_2.remove_vpp_config()
385 sub_if_on_pg3.remove_vpp_config()
386 sub_if_on_pg2.remove_vpp_config()
389 if __name__ == '__main__':
390 unittest.main(testRunner=VppTestRunner)