5 from framework import VppTestCase, VppTestRunner
7 from scapy.layers.inet6 import IPv6, ICMPv6EchoRequest
8 from scapy.layers.l2 import Ether
9 from scapy.packet import Raw
12 class TestNPT66(VppTestCase):
16 super(TestNPT66, self).setUp()
18 # create 2 pg interfaces
19 self.create_pg_interfaces(range(2))
21 for i in self.pg_interfaces:
27 for i in self.pg_interfaces:
30 super(TestNPT66, self).tearDown()
32 def send_and_verify(self, internal):
35 local_mac = self.pg0.local_mac
36 remote_mac = self.pg0.remote_mac
37 src = ipaddress.ip_interface(internal).ip + 1
38 dst = self.pg1.remote_ip6
41 Ether(dst=local_mac, src=remote_mac)
42 / IPv6(src=src, dst=dst)
46 rxs = self.send_and_expect(sendif, p, recvif)
48 original_cksum = rx[ICMPv6EchoRequest].cksum
49 del rx[ICMPv6EchoRequest].cksum
50 rx = rx.__class__(bytes(rx))
51 self.assertEqual(original_cksum, rx[ICMPv6EchoRequest].cksum)
55 Ether(dst=rx[Ether].src, src=local_mac)
56 / IPv6(src=rx[IPv6].dst, dst=rx[IPv6].src)
61 replies = self.send_and_expect(recvif, reply, sendif)
63 self.assertEqual(str(p[IPv6].src), r[IPv6].dst)
64 original_cksum = r[ICMPv6EchoRequest].cksum
65 del r[ICMPv6EchoRequest].cksum
66 r = r.__class__(bytes(r))
67 self.assertEqual(original_cksum, r[ICMPv6EchoRequest].cksum)
69 def do_test(self, internal, external):
70 self.vapi.npt66_binding_add_del(
71 sw_if_index=self.pg1.sw_if_index,
77 self.vapi.cli(f"ip route add {internal} via {self.pg0.remote_ip6}")
79 self.send_and_verify(internal)
81 self.vapi.npt66_binding_add_del(
82 sw_if_index=self.pg1.sw_if_index,
88 def test_npt66_simple(self):
89 """Send and receive a packet through NPT66"""
91 self.do_test("fd00:0000:0000::/48", "2001:4650:c3ed::/48")
92 self.do_test("fc00:1::/48", "2001:db8:1::/48")
93 self.do_test("fc00:1234::/32", "2001:db8:1::/32")
94 self.do_test("fc00:1234::/63", "2001:db8:1::/56")
97 if __name__ == "__main__":
98 unittest.main(testRunner=VppTestRunner)