4 from util import ip4_range, reassemble4
6 from framework import VppTestCase, VppTestRunner
7 from template_bd import BridgeDomain
9 from scapy.layers.l2 import Ether
10 from scapy.packet import Raw
11 from scapy.layers.inet import IP, UDP
12 from scapy.layers.vxlan import VXLAN
15 from vpp_ip_route import VppIpRoute, VppRoutePath
16 from vpp_vxlan_tunnel import VppVxlanTunnel
17 from vpp_ip import INVALID_INDEX
20 class TestVxlan(BridgeDomain, VppTestCase):
21 """ VXLAN Test Case """
23 def __init__(self, *args):
24 BridgeDomain.__init__(self)
25 VppTestCase.__init__(self, *args)
27 def encapsulate(self, pkt, vni):
29 Encapsulate the original payload frame by adding VXLAN header with its
30 UDP, IP and Ethernet fields
32 return (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
33 IP(src=self.pg0.remote_ip4, dst=self.pg0.local_ip4) /
34 UDP(sport=self.dport, dport=self.dport, chksum=0) /
35 VXLAN(vni=vni, flags=self.flags) /
38 def ip_range(self, start, end):
39 """ range of remote ip's """
40 return ip4_range(self.pg0.remote_ip4, start, end)
42 def encap_mcast(self, pkt, src_ip, src_mac, vni):
44 Encapsulate the original payload frame by adding VXLAN header with its
45 UDP, IP and Ethernet fields
47 return (Ether(src=src_mac, dst=self.mcast_mac) /
48 IP(src=src_ip, dst=self.mcast_ip4) /
49 UDP(sport=self.dport, dport=self.dport, chksum=0) /
50 VXLAN(vni=vni, flags=self.flags) /
53 def decapsulate(self, pkt):
55 Decapsulate the original payload frame by removing VXLAN header
57 # check if is set I flag
58 self.assertEqual(pkt[VXLAN].flags, int('0x8', 16))
59 return pkt[VXLAN].payload
61 # Method for checking VXLAN encapsulation.
63 def check_encapsulation(self, pkt, vni, local_only=False, mcast_pkt=False):
64 # TODO: add error messages
65 # Verify source MAC is VPP_MAC and destination MAC is MY_MAC resolved
67 self.assertEqual(pkt[Ether].src, self.pg0.local_mac)
70 self.assertEqual(pkt[Ether].dst, self.pg0.remote_mac)
72 self.assertEqual(pkt[Ether].dst, type(self).mcast_mac)
73 # Verify VXLAN tunnel source IP is VPP_IP and destination IP is MY_IP.
74 self.assertEqual(pkt[IP].src, self.pg0.local_ip4)
77 self.assertEqual(pkt[IP].dst, self.pg0.remote_ip4)
79 self.assertEqual(pkt[IP].dst, type(self).mcast_ip4)
80 # Verify UDP destination port is VXLAN 4789, source UDP port could be
82 self.assertEqual(pkt[UDP].dport, type(self).dport)
83 # TODO: checksum check
85 self.assertEqual(pkt[VXLAN].vni, vni)
88 def create_vxlan_flood_test_bd(cls, vni, n_ucast_tunnels):
89 # Create 10 ucast vxlan tunnels under bd
91 ip_range_end = ip_range_start + n_ucast_tunnels
92 next_hop_address = cls.pg0.remote_ip4
93 for dest_ip4 in ip4_range(next_hop_address, ip_range_start,
95 # add host route so dest_ip4 will not be resolved
96 rip = VppIpRoute(cls, dest_ip4, 32,
97 [VppRoutePath(next_hop_address,
102 r = VppVxlanTunnel(cls, src=cls.pg0.local_ip4,
103 dst=dest_ip4, vni=vni)
105 cls.vapi.sw_interface_set_l2_bridge(r.sw_if_index, bd_id=vni)
108 def add_del_shared_mcast_dst_load(cls, is_add):
110 add or del tunnels sharing the same mcast dst
111 to test vxlan ref_count mechanism
113 n_shared_dst_tunnels = 20
115 vni_end = vni_start + n_shared_dst_tunnels
116 for vni in range(vni_start, vni_end):
117 r = VppVxlanTunnel(cls, src=cls.pg0.local_ip4,
118 dst=cls.mcast_ip4, mcast_sw_if_index=1, vni=vni)
121 if r.sw_if_index == 0xffffffff:
122 raise ValueError("bad sw_if_index: ~0")
124 r.remove_vpp_config()
127 def add_shared_mcast_dst_load(cls):
128 cls.add_del_shared_mcast_dst_load(is_add=1)
131 def del_shared_mcast_dst_load(cls):
132 cls.add_del_shared_mcast_dst_load(is_add=0)
135 def add_del_mcast_tunnels_load(cls, is_add):
137 add or del tunnels to test vxlan stability
139 n_distinct_dst_tunnels = 200
141 ip_range_end = ip_range_start + n_distinct_dst_tunnels
142 for dest_ip4 in ip4_range(cls.mcast_ip4, ip_range_start,
144 vni = bytearray(socket.inet_pton(socket.AF_INET, dest_ip4))[3]
145 r = VppVxlanTunnel(cls, src=cls.pg0.local_ip4,
146 dst=dest_ip4, mcast_sw_if_index=1, vni=vni)
150 r.remove_vpp_config()
153 def add_mcast_tunnels_load(cls):
154 cls.add_del_mcast_tunnels_load(is_add=1)
157 def del_mcast_tunnels_load(cls):
158 cls.add_del_mcast_tunnels_load(is_add=0)
160 # Class method to start the VXLAN test case.
161 # Overrides setUpClass method in VppTestCase class.
162 # Python try..except statement is used to ensure that the tear down of
163 # the class will be executed even if exception is raised.
164 # @param cls The class pointer.
167 super(TestVxlan, cls).setUpClass()
173 # Create 2 pg interfaces.
174 cls.create_pg_interfaces(range(4))
175 for pg in cls.pg_interfaces:
178 # Configure IPv4 addresses on VPP pg0.
181 # Resolve MAC address for VPP's IP address on pg0.
182 cls.pg0.resolve_arp()
184 # Our Multicast address
185 cls.mcast_ip4 = '239.1.1.1'
186 cls.mcast_mac = util.mcast_ip_to_mac(cls.mcast_ip4)
192 def tearDownClass(cls):
193 super(TestVxlan, cls).tearDownClass()
196 super(TestVxlan, self).setUp()
197 # Create VXLAN VTEP on VPP pg0, and put vxlan_tunnel0 and pg1
199 self.single_tunnel_vni = 0x12345
200 self.single_tunnel_bd = 1
201 r = VppVxlanTunnel(self, src=self.pg0.local_ip4,
202 dst=self.pg0.remote_ip4,
203 vni=self.single_tunnel_vni)
205 self.vapi.sw_interface_set_l2_bridge(rx_sw_if_index=r.sw_if_index,
206 bd_id=self.single_tunnel_bd)
207 self.vapi.sw_interface_set_l2_bridge(
208 rx_sw_if_index=self.pg1.sw_if_index, bd_id=self.single_tunnel_bd)
210 # Setup vni 2 to test multicast flooding
211 self.n_ucast_tunnels = 10
212 self.mcast_flood_bd = 2
213 self.create_vxlan_flood_test_bd(self.mcast_flood_bd,
214 self.n_ucast_tunnels)
215 r = VppVxlanTunnel(self, src=self.pg0.local_ip4, dst=self.mcast_ip4,
216 mcast_sw_if_index=1, vni=self.mcast_flood_bd)
218 self.vapi.sw_interface_set_l2_bridge(rx_sw_if_index=r.sw_if_index,
219 bd_id=self.mcast_flood_bd)
220 self.vapi.sw_interface_set_l2_bridge(
221 rx_sw_if_index=self.pg2.sw_if_index, bd_id=self.mcast_flood_bd)
223 # Add and delete mcast tunnels to check stability
224 self.add_shared_mcast_dst_load()
225 self.add_mcast_tunnels_load()
226 self.del_shared_mcast_dst_load()
227 self.del_mcast_tunnels_load()
229 # Setup vni 3 to test unicast flooding
230 self.ucast_flood_bd = 3
231 self.create_vxlan_flood_test_bd(self.ucast_flood_bd,
232 self.n_ucast_tunnels)
233 self.vapi.sw_interface_set_l2_bridge(
234 rx_sw_if_index=self.pg3.sw_if_index, bd_id=self.ucast_flood_bd)
236 def test_decap(self):
237 """ Decapsulation test
240 super(TestVxlan, self).test_decap()
242 def test_encap_big_packet(self):
243 """ Encapsulation test send big frame from pg1
244 Verify receipt of encapsulated frames on pg0
247 self.vapi.sw_interface_set_mtu(self.pg0.sw_if_index, [1500, 0, 0, 0])
249 frame = (Ether(src='00:00:00:00:00:02', dst='00:00:00:00:00:01') /
250 IP(src='4.3.2.1', dst='1.2.3.4') /
251 UDP(sport=20000, dport=10000) /
254 self.pg1.add_stream([frame])
256 self.pg0.enable_capture()
260 # Pick first received frame and check if it's correctly encapsulated.
261 out = self.pg0.get_capture(2)
263 pkt = reassemble4(out)
265 self.check_encapsulation(pkt, self.single_tunnel_vni)
267 payload = self.decapsulate(pkt)
269 # self.assert_eq_pkts(payload, frame)
271 # Method to define VPP actions before tear down of the test case.
272 # Overrides tearDown method in VppTestCase class.
273 # @param self The object pointer.
275 super(TestVxlan, self).tearDown()
277 def show_commands_at_teardown(self):
278 self.logger.info(self.vapi.cli("show bridge-domain 1 detail"))
279 self.logger.info(self.vapi.cli("show bridge-domain 2 detail"))
280 self.logger.info(self.vapi.cli("show bridge-domain 3 detail"))
281 self.logger.info(self.vapi.cli("show vxlan tunnel"))
284 if __name__ == '__main__':
285 unittest.main(testRunner=VppTestRunner)