5 from framework import VppTestCase, VppTestRunner
7 from scapy.layers.inet6 import IPv6, ICMPv6EchoRequest, ICMPv6DestUnreach
8 from scapy.layers.l2 import Ether
9 from scapy.packet import Raw
12 class TestNPT66(VppTestCase):
15 extra_vpp_plugin_config = [
16 "plugin npt66_plugin.so {enable}",
20 super(TestNPT66, self).setUp()
22 # create 2 pg interfaces
23 self.create_pg_interfaces(range(2))
25 for i in self.pg_interfaces:
31 for i in self.pg_interfaces:
34 super(TestNPT66, self).tearDown()
36 def send_and_verify(self, internal, reply_icmp_error=False):
39 local_mac = self.pg0.local_mac
40 remote_mac = self.pg0.remote_mac
41 src = ipaddress.ip_interface(internal).ip + 1
42 dst = self.pg1.remote_ip6
45 Ether(dst=local_mac, src=remote_mac)
46 / IPv6(src=src, dst=dst)
50 # print('Sending packet')
52 rxs = self.send_and_expect(sendif, p, recvif)
54 # print('Received packet')
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)
63 # print('Generating an ICMP error message')
65 Ether(dst=rx[Ether].src, src=local_mac)
66 / IPv6(src=rx[IPv6].dst, dst=rx[IPv6].src)
70 # print('Sending ICMP error message reply')
72 replies = self.send_and_expect(recvif, reply, sendif)
74 # print('Received ICMP error message reply on the other side')
76 self.assertEqual(str(p[IPv6].src), r[IPv6].dst)
77 original_cksum = r[ICMPv6EchoRequest].cksum
78 del r[ICMPv6EchoRequest].cksum
79 r = r.__class__(bytes(r))
80 self.assertEqual(original_cksum, r[ICMPv6EchoRequest].cksum)
84 Ether(dst=rx[Ether].src, src=local_mac)
85 / IPv6(src=rx[IPv6].dst, dst=rx[IPv6].src)
90 replies = self.send_and_expect(recvif, reply, sendif)
93 self.assertEqual(str(p[IPv6].src), r[IPv6].dst)
94 original_cksum = r[ICMPv6EchoRequest].cksum
95 del r[ICMPv6EchoRequest].cksum
96 r = r.__class__(bytes(r))
97 self.assertEqual(original_cksum, r[ICMPv6EchoRequest].cksum)
99 def do_test(self, internal, external, reply_icmp_error=False):
100 """Add NPT66 binding and send packet"""
101 self.vapi.npt66_binding_add_del(
102 sw_if_index=self.pg1.sw_if_index,
107 ## TODO use route api
108 self.vapi.cli(f"ip route add {internal} via {self.pg0.remote_ip6}")
110 self.send_and_verify(internal, reply_icmp_error=reply_icmp_error)
112 self.vapi.npt66_binding_add_del(
113 sw_if_index=self.pg1.sw_if_index,
119 def test_npt66_simple(self):
120 """Send and receive a packet through NPT66"""
122 self.do_test("fd00:0000:0000::/48", "2001:4650:c3ed::/48")
123 self.do_test("fc00:1::/48", "2001:db8:1::/48")
124 self.do_test("fc00:1234::/32", "2001:db8:1::/32")
125 self.do_test("fc00:1234::/63", "2001:db8:1::/56")
127 def test_npt66_icmp6(self):
128 """Send and receive a packet through NPT66"""
130 # Test ICMP6 error packets
132 "fd00:0000:0000::/48", "2001:4650:c3ed::/48", reply_icmp_error=True
134 self.do_test("fc00:1::/48", "2001:db8:1::/48", reply_icmp_error=True)
135 self.do_test("fc00:1234::/32", "2001:db8:1::/32", reply_icmp_error=True)
136 self.do_test("fc00:1234::/63", "2001:db8:1::/56", reply_icmp_error=True)
139 if __name__ == "__main__":
140 unittest.main(testRunner=VppTestRunner)