4 from framework import VppTestCase, VppTestRunner
5 from vpp_ip_route import VppIpRoute, VppRoutePath, FibPathType
6 from vpp_l2 import L2_PORT_TYPE
7 from vpp_sub_interface import L2_VTR_OP, VppDot1QSubint
8 from vpp_acl import AclRule, VppAcl, VppAclInterface
10 from scapy.packet import Raw
11 from scapy.layers.l2 import Ether, Dot1Q
12 from scapy.layers.inet import IP, UDP
13 from socket import AF_INET, inet_pton
14 from ipaddress import IPv4Network
19 class TestDVR(VppTestCase):
20 """ Distributed Virtual Router """
24 super(TestDVR, cls).setUpClass()
27 def tearDownClass(cls):
28 super(TestDVR, cls).tearDownClass()
31 super(TestDVR, self).setUp()
33 self.create_pg_interfaces(range(4))
34 self.create_loopback_interfaces(1)
36 for i in self.pg_interfaces:
39 self.loop0.config_ip4()
42 for i in self.pg_interfaces:
44 self.loop0.unconfig_ip4()
46 super(TestDVR, self).tearDown()
48 def assert_same_mac_addr(self, tx, rx):
52 self.assertEqual(t_eth.src, r_eth.src)
53 self.assertEqual(t_eth.dst, r_eth.dst)
55 def assert_has_vlan_tag(self, tag, rx):
58 self.assertEqual(tag, r_1q.vlan)
60 def assert_has_no_tag(self, rx):
62 self.assertFalse(p.haslayer(Dot1Q))
65 """ Distributed Virtual Router """
68 # A packet destined to an IP address that is L2 bridged via
71 ip_non_tag_bridged = "10.10.10.10"
72 ip_tag_bridged = "10.10.10.11"
73 any_src_addr = "1.1.1.1"
75 pkt_no_tag = (Ether(src=self.pg0.remote_mac,
76 dst=self.loop0.local_mac) /
78 dst=ip_non_tag_bridged) /
79 UDP(sport=1234, dport=1234) /
81 pkt_tag = (Ether(src=self.pg0.remote_mac,
82 dst=self.loop0.local_mac) /
85 UDP(sport=1234, dport=1234) /
89 # Two sub-interfaces so we can test VLAN tag push/pop
91 sub_if_on_pg2 = VppDot1QSubint(self, self.pg2, 92)
92 sub_if_on_pg3 = VppDot1QSubint(self, self.pg3, 93)
93 sub_if_on_pg2.admin_up()
94 sub_if_on_pg3.admin_up()
97 # Put all the interfaces into a new bridge domain
99 self.vapi.sw_interface_set_l2_bridge(
100 rx_sw_if_index=self.pg0.sw_if_index, bd_id=1)
101 self.vapi.sw_interface_set_l2_bridge(
102 rx_sw_if_index=self.pg1.sw_if_index, bd_id=1)
103 self.vapi.sw_interface_set_l2_bridge(
104 rx_sw_if_index=sub_if_on_pg2.sw_if_index, bd_id=1)
105 self.vapi.sw_interface_set_l2_bridge(
106 rx_sw_if_index=sub_if_on_pg3.sw_if_index, bd_id=1)
107 self.vapi.sw_interface_set_l2_bridge(
108 rx_sw_if_index=self.loop0.sw_if_index, bd_id=1,
109 port_type=L2_PORT_TYPE.BVI)
111 self.vapi.l2_interface_vlan_tag_rewrite(
112 sw_if_index=sub_if_on_pg2.sw_if_index, vtr_op=L2_VTR_OP.L2_POP_1,
114 self.vapi.l2_interface_vlan_tag_rewrite(
115 sw_if_index=sub_if_on_pg3.sw_if_index, vtr_op=L2_VTR_OP.L2_POP_1,
119 # Add routes to bridge the traffic via a tagged an nontagged interface
121 route_no_tag = VppIpRoute(
122 self, ip_non_tag_bridged, 32,
123 [VppRoutePath("0.0.0.0",
124 self.pg1.sw_if_index,
125 type=FibPathType.FIB_PATH_TYPE_DVR)])
126 route_no_tag.add_vpp_config()
129 # Inject the packet that arrives and leaves on a non-tagged interface
130 # Since it's 'bridged' expect that the MAC headed is unchanged.
132 rx = self.send_and_expect(self.pg0, pkt_no_tag * NUM_PKTS, self.pg1)
133 self.assert_same_mac_addr(pkt_no_tag, rx)
134 self.assert_has_no_tag(rx)
137 # Add routes to bridge the traffic via a tagged interface
139 route_with_tag = VppIpRoute(
140 self, ip_tag_bridged, 32,
141 [VppRoutePath("0.0.0.0",
142 sub_if_on_pg3.sw_if_index,
143 type=FibPathType.FIB_PATH_TYPE_DVR)])
144 route_with_tag.add_vpp_config()
147 # Inject the packet that arrives non-tag and leaves on a tagged
150 rx = self.send_and_expect(self.pg0, pkt_tag * NUM_PKTS, self.pg3)
151 self.assert_same_mac_addr(pkt_tag, rx)
152 self.assert_has_vlan_tag(93, rx)
157 pkt_tag_to_tag = (Ether(src=self.pg2.remote_mac,
158 dst=self.loop0.local_mac) /
161 dst=ip_tag_bridged) /
162 UDP(sport=1234, dport=1234) /
165 rx = self.send_and_expect(self.pg2,
166 pkt_tag_to_tag * NUM_PKTS,
168 self.assert_same_mac_addr(pkt_tag_to_tag, rx)
169 self.assert_has_vlan_tag(93, rx)
174 pkt_tag_to_non_tag = (Ether(src=self.pg2.remote_mac,
175 dst=self.loop0.local_mac) /
178 dst=ip_non_tag_bridged) /
179 UDP(sport=1234, dport=1234) /
182 rx = self.send_and_expect(self.pg2,
183 pkt_tag_to_non_tag * NUM_PKTS,
185 self.assert_same_mac_addr(pkt_tag_to_tag, rx)
186 self.assert_has_no_tag(rx)
189 # Add an output L3 ACL that will block the traffic
191 rule_1 = AclRule(is_permit=0, proto=17, ports=1234,
192 src_prefix=IPv4Network((any_src_addr, 32)),
193 dst_prefix=IPv4Network((ip_non_tag_bridged, 32)))
194 acl = VppAcl(self, rules=[rule_1])
198 # Apply the ACL on the output interface
200 acl_if1 = VppAclInterface(self, sw_if_index=self.pg1.sw_if_index,
201 n_input=0, acls=[acl])
202 acl_if1.add_vpp_config()
205 # Send packet's that should match the ACL and be dropped
207 rx = self.send_and_assert_no_replies(self.pg2,
208 pkt_tag_to_non_tag * NUM_PKTS)
213 acl_if1.remove_vpp_config()
214 acl.remove_vpp_config()
216 self.vapi.sw_interface_set_l2_bridge(
217 rx_sw_if_index=self.pg0.sw_if_index, bd_id=1, enable=0)
218 self.vapi.sw_interface_set_l2_bridge(
219 rx_sw_if_index=self.pg1.sw_if_index, bd_id=1, enable=0)
220 self.vapi.sw_interface_set_l2_bridge(
221 rx_sw_if_index=sub_if_on_pg2.sw_if_index, bd_id=1, enable=0)
222 self.vapi.sw_interface_set_l2_bridge(
223 rx_sw_if_index=sub_if_on_pg3.sw_if_index, bd_id=1, enable=0)
224 self.vapi.sw_interface_set_l2_bridge(
225 rx_sw_if_index=self.loop0.sw_if_index, bd_id=1,
226 port_type=L2_PORT_TYPE.BVI, enable=0)
229 # Do a FIB dump to make sure the paths are correctly reported as DVR
231 routes = self.vapi.ip_route_dump(0)
234 if (ip_tag_bridged == str(r.route.prefix.network_address)):
235 self.assertEqual(r.route.paths[0].sw_if_index,
236 sub_if_on_pg3.sw_if_index)
237 self.assertEqual(r.route.paths[0].type,
238 FibPathType.FIB_PATH_TYPE_DVR)
239 if (ip_non_tag_bridged == str(r.route.prefix.network_address)):
240 self.assertEqual(r.route.paths[0].sw_if_index,
241 self.pg1.sw_if_index)
242 self.assertEqual(r.route.paths[0].type,
243 FibPathType.FIB_PATH_TYPE_DVR)
246 # the explicit route delete is require so it happens before
247 # the sbu-interface delete. subinterface delete is required
248 # because that object type does not use the object registry
250 route_no_tag.remove_vpp_config()
251 route_with_tag.remove_vpp_config()
252 sub_if_on_pg3.remove_vpp_config()
253 sub_if_on_pg2.remove_vpp_config()
256 if __name__ == '__main__':
257 unittest.main(testRunner=VppTestRunner)