5 from scapy.layers.l2 import Ether
6 from scapy.packet import Raw
7 from scapy.layers.inet import IP, UDP
10 class BridgeDomain(metaclass=abc.ABCMeta):
11 """ Bridge domain abstraction """
14 def frame_request(self):
15 """ Ethernet frame modeling a generic request """
16 return (Ether(src='00:00:00:00:00:01', dst='00:00:00:00:00:02') /
17 IP(src='1.2.3.4', dst='4.3.2.1') /
18 UDP(sport=10000, dport=20000) /
22 def frame_reply(self):
23 """ Ethernet frame modeling a generic reply """
24 return (Ether(src='00:00:00:00:00:02', dst='00:00:00:00:00:01') /
25 IP(src='4.3.2.1', dst='1.2.3.4') /
26 UDP(sport=20000, dport=10000) /
30 def ip_range(self, start, end):
31 """ range of remote ip's """
35 def encap_mcast(self, pkt, src_ip, src_mac, vni):
36 """ Encapsulate mcast packet """
40 def encapsulate(self, pkt, vni):
41 """ Encapsulate packet """
45 def decapsulate(self, pkt):
46 """ Decapsulate packet """
50 def check_encapsulation(self, pkt, vni, local_only=False):
51 """ Verify the encapsulation """
54 def assert_eq_pkts(self, pkt1, pkt2):
55 """ Verify the Ether, IP, UDP, payload are equal in both
58 self.assertEqual(pkt1[Ether].src, pkt2[Ether].src)
59 self.assertEqual(pkt1[Ether].dst, pkt2[Ether].dst)
60 self.assertEqual(pkt1[IP].src, pkt2[IP].src)
61 self.assertEqual(pkt1[IP].dst, pkt2[IP].dst)
62 self.assertEqual(pkt1[UDP].sport, pkt2[UDP].sport)
63 self.assertEqual(pkt1[UDP].dport, pkt2[UDP].dport)
64 self.assertEqual(pkt1[Raw], pkt2[Raw])
67 """ Decapsulation test
68 Send encapsulated frames from pg0
69 Verify receipt of decapsulated frames on pg1
72 encapsulated_pkt = self.encapsulate(self.frame_request,
73 self.single_tunnel_vni)
75 self.pg0.add_stream([encapsulated_pkt, ])
77 self.pg1.enable_capture()
81 # Pick first received frame and check if it's the non-encapsulated
83 out = self.pg1.get_capture(1)
85 self.assert_eq_pkts(pkt, self.frame_request)
88 """ Encapsulation test
90 Verify receipt of encapsulated frames on pg0
92 self.pg1.add_stream([self.frame_reply])
94 self.pg0.enable_capture()
98 # Pick first received frame and check if it's correctly encapsulated.
99 out = self.pg0.get_capture(1)
101 self.check_encapsulation(pkt, self.single_tunnel_vni)
103 payload = self.decapsulate(pkt)
104 self.assert_eq_pkts(payload, self.frame_reply)
106 def test_ucast_flood(self):
107 """ Unicast flood test
109 Verify receipt of encapsulated frames on pg0
111 self.pg3.add_stream([self.frame_reply])
113 self.pg0.enable_capture()
117 # Get packet from each tunnel and assert it's correctly encapsulated.
118 out = self.pg0.get_capture(self.n_ucast_tunnels)
120 self.check_encapsulation(pkt, self.ucast_flood_bd, True)
121 payload = self.decapsulate(pkt)
122 self.assert_eq_pkts(payload, self.frame_reply)
124 def test_mcast_flood(self):
125 """ Multicast flood test
127 Verify receipt of encapsulated frames on pg0
129 self.pg2.add_stream([self.frame_reply])
131 self.pg0.enable_capture()
135 # Pick first received frame and check if it's correctly encapsulated.
136 out = self.pg0.get_capture(1)
138 self.check_encapsulation(pkt, self.mcast_flood_bd,
139 local_only=False, mcast_pkt=True)
141 payload = self.decapsulate(pkt)
142 self.assert_eq_pkts(payload, self.frame_reply)
144 def test_mcast_rcv(self):
145 """ Multicast receive test
146 Send 20 encapsulated frames from pg0 only 10 match unicast tunnels
147 Verify receipt of 10 decap frames on pg2
149 mac = self.pg0.remote_mac
153 self.encap_mcast(self.frame_request, ip, mac, self.mcast_flood_bd)
154 for ip in self.ip_range(ip_range_start, ip_range_end)]
155 self.pg0.add_stream(mcast_stream)
156 self.pg2.enable_capture()
158 out = self.pg2.get_capture(10)
160 self.assert_eq_pkts(pkt, self.frame_request)