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, in2out, internal, external):
36 local_mac = self.pg0.local_mac
37 remote_mac = self.pg0.remote_mac
38 src = ipaddress.ip_interface(internal).ip + 1
39 dst = self.pg1.remote_ip6
43 local_mac = self.pg1.local_mac
44 remote_mac = self.pg1.remote_mac
45 src = self.pg1.remote_ip6
46 dst = ipaddress.ip_interface(external).ip + 1
49 Ether(dst=local_mac, src=remote_mac)
50 / IPv6(src=src, dst=dst)
53 rxs = self.send_and_expect(sendif, p, recvif)
56 original_cksum = rx[ICMPv6EchoRequest].cksum
57 del rx[ICMPv6EchoRequest].cksum
58 rx = rx.__class__(bytes(rx))
59 self.assertEqual(original_cksum, rx[ICMPv6EchoRequest].cksum)
61 def do_test(self, internal, external):
62 self.vapi.npt66_binding_add_del(
63 sw_if_index=self.pg1.sw_if_index,
68 self.vapi.cli(f"ip route add {internal} via {self.pg0.remote_ip6}")
70 self.send_and_verify(True, internal, external)
71 self.send_and_verify(False, internal, external)
73 self.vapi.npt66_binding_add_del(
74 sw_if_index=self.pg1.sw_if_index,
80 def test_npt66_simple(self):
81 """Send and receive a packet through NPT66"""
83 self.do_test("fc00:1::/48", "2001:db8:1::/48")
84 self.do_test("fc00:1234::/32", "2001:db8:1::/32")
85 self.do_test("fc00:1234::/63", "2001:db8:1::/56")
88 if __name__ == "__main__":
89 unittest.main(testRunner=VppTestRunner)