3 from abc import abstractmethod
5 from scapy.layers.l2 import Ether, Raw
6 from scapy.layers.inet import IP, UDP
9 class BridgeDomain(object):
10 """ Bridge domain abstraction """
13 def frame_pg0_to_pg1(self):
14 """ Ethernet frame sent from pg0 and expected to arrive at pg1 """
15 return (Ether(src='00:00:00:00:00:01', dst='00:00:00:00:00:02') /
16 IP(src='1.2.3.4', dst='4.3.2.1') /
17 UDP(sport=10000, dport=20000) /
21 def frame_pg1_to_pg0(self):
22 """ Ethernet frame sent from pg1 and expected to arrive at pg0 """
23 return (Ether(src='00:00:00:00:00:02', dst='00:00:00:00:00:01') /
24 IP(src='4.3.2.1', dst='1.2.3.4') /
25 UDP(sport=20000, dport=10000) /
29 def encapsulate(self, pkt):
30 """ Encapsulate packet """
34 def decapsulate(self, pkt):
35 """ Decapsulate packet """
39 def check_encapsulation(self, pkt):
40 """ Verify the encapsulation """
44 """ Decapsulation test
45 Send encapsulated frames from pg0
46 Verify receipt of decapsulated frames on pg1
49 encapsulated_pkt = self.encapsulate(self.frame_pg0_to_pg1)
51 self.pg0.add_stream([encapsulated_pkt, ])
53 self.pg1.enable_capture()
57 # Pick first received frame and check if it's the non-encapsulated frame
58 out = self.pg1.get_capture()
59 self.assertEqual(len(out), 1,
60 'Invalid number of packets on '
61 'output: {}'.format(len(out)))
64 # TODO: add error messages
65 self.assertEqual(pkt[Ether].src, self.frame_pg0_to_pg1[Ether].src)
66 self.assertEqual(pkt[Ether].dst, self.frame_pg0_to_pg1[Ether].dst)
67 self.assertEqual(pkt[IP].src, self.frame_pg0_to_pg1[IP].src)
68 self.assertEqual(pkt[IP].dst, self.frame_pg0_to_pg1[IP].dst)
69 self.assertEqual(pkt[UDP].sport, self.frame_pg0_to_pg1[UDP].sport)
70 self.assertEqual(pkt[UDP].dport, self.frame_pg0_to_pg1[UDP].dport)
71 self.assertEqual(pkt[Raw], self.frame_pg0_to_pg1[Raw])
74 """ Encapsulation test
76 Verify receipt of encapsulated frames on pg0
78 self.pg1.add_stream([self.frame_pg1_to_pg0])
80 self.pg0.enable_capture()
84 # Pick first received frame and check if it's corectly encapsulated.
85 out = self.pg0.get_capture()
86 self.assertEqual(len(out), 1,
87 'Invalid number of packets on '
88 'output: {}'.format(len(out)))
90 self.check_encapsulation(pkt)
92 payload = self.decapsulate(pkt)
93 # TODO: add error messages
94 self.assertEqual(payload[Ether].src, self.frame_pg1_to_pg0[Ether].src)
95 self.assertEqual(payload[Ether].dst, self.frame_pg1_to_pg0[Ether].dst)
96 self.assertEqual(payload[IP].src, self.frame_pg1_to_pg0[IP].src)
97 self.assertEqual(payload[IP].dst, self.frame_pg1_to_pg0[IP].dst)
98 self.assertEqual(payload[UDP].sport, self.frame_pg1_to_pg0[UDP].sport)
99 self.assertEqual(payload[UDP].dport, self.frame_pg1_to_pg0[UDP].dport)
100 self.assertEqual(payload[Raw], self.frame_pg1_to_pg0[Raw])