| #!/usr/bin/env python3 |
| |
| import unittest |
| from socket import inet_pton, inet_ntop |
| |
| from framework import VppTestCase |
| from asfframework import VppTestRunner |
| |
| from vpp_ip import VppIpPuntRedirect |
| |
| from scapy.layers.l2 import Ether |
| from scapy.layers.inet6 import ( |
| IPv6, |
| ipv6nh, |
| ICMPv6ND_NS, |
| ICMPv6ND_NA, |
| ICMPv6NDOptSrcLLAddr, |
| ICMPv6NDOptDstLLAddr, |
| ICMPv6EchoRequest, |
| ICMPv6EchoReply, |
| ) |
| from scapy.utils6 import in6_ptop, in6_getnsma, in6_getnsmac |
| |
| |
| class TestNDPROXY(VppTestCase): |
| """IP6 ND (mirror) Proxy Test Case""" |
| |
| @classmethod |
| def setUpClass(self): |
| super(TestNDPROXY, self).setUpClass() |
| self.create_pg_interfaces(range(2)) |
| |
| @classmethod |
| def tearDownClass(self): |
| super(TestNDPROXY, self).tearDownClass() |
| |
| def setUp(self): |
| super(TestNDPROXY, self).setUp() |
| for i in self.pg_interfaces: |
| i.admin_up() |
| i.config_ip6() |
| i.disable_ipv6_ra() |
| |
| def tearDown(self): |
| super(TestNDPROXY, self).tearDown() |
| if not self.vpp_dead: |
| for i in self.pg_interfaces: |
| i.unconfig_ip6() |
| i.admin_down() |
| |
| def test_nd_mirror_proxy(self): |
| """Interface (Mirror) Proxy ND""" |
| |
| # |
| # When VPP has an interface whose address is also applied to a TAP |
| # interface on the host, then VPP's TAP interface will be unnumbered |
| # to the 'real' interface and do proxy ND from the host. |
| # the curious aspect of this setup is that ND requests from the host |
| # will come from the VPP's own address. |
| # |
| addr = self.pg0.remote_ip6 |
| nsma = in6_getnsma(inet_pton(socket.AF_INET6, addr)) |
| d = inet_ntop(socket.AF_INET6, nsma) |
| |
| # Make pg1 un-numbered to pg0 |
| # |
| self.pg1.unconfig_ip6() |
| self.pg1.set_unnumbered(self.pg0.sw_if_index) |
| |
| # |
| # Enable ND proxy on pg1 |
| # |
| self.vapi.ip6nd_proxy_enable_disable( |
| sw_if_index=self.pg1.sw_if_index, is_enable=1 |
| ) |
| # |
| # Send the ND request with an originating address that |
| # is VPP's own address |
| # |
| nd_req_from_host = ( |
| Ether(src=self.pg1.remote_mac, dst=in6_getnsmac(nsma)) |
| / IPv6(dst=d, src=self.pg0.local_ip6) |
| / ICMPv6ND_NS(tgt=addr) |
| / ICMPv6NDOptSrcLLAddr(lladdr=self.pg1.remote_mac) |
| ) |
| |
| rx = self.send_and_expect(self.pg1, [nd_req_from_host], self.pg1) |
| self.assertEqual(rx[0][Ether].src, self.pg1.local_mac) |
| self.assertEqual(rx[0][Ether].dst, self.pg1.remote_mac) |
| self.assertEqual(rx[0][IPv6].src, self.pg0.remote_ip6) |
| self.assertEqual(rx[0][IPv6].dst, self.pg0.local_ip6) |
| self.assertEqual(ipv6nh[rx[0][IPv6].nh], "ICMPv6") |
| self.assertEqual(rx[0][ICMPv6ND_NA].tgt, self.pg0.remote_ip6) |
| self.assertTrue(rx[0].haslayer(ICMPv6NDOptDstLLAddr)) |
| self.assertEqual(rx[0][ICMPv6NDOptDstLLAddr].lladdr, self.pg1.local_mac) |
| |
| # |
| # Send the unicast ND request |
| # |
| unicast_nd_req_from_host = ( |
| Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) |
| / IPv6(dst=self.pg0.remote_ip6, src=self.pg1.remote_ip6_ll) |
| / ICMPv6ND_NS(tgt=self.pg0.remote_ip6) |
| / ICMPv6NDOptSrcLLAddr(lladdr=self.pg1.remote_mac) |
| ) |
| |
| rx = self.send_and_expect(self.pg1, [unicast_nd_req_from_host], self.pg0) |
| self.assertEqual(rx[0][Ether].src, self.pg0.local_mac) |
| self.assertEqual(rx[0][Ether].dst, in6_getnsmac(nsma)) |
| self.assertEqual(rx[0][IPv6].src, self.pg0.local_ip6_ll) |
| self.assertEqual(rx[0][IPv6].dst, d) |
| self.assertEqual(ipv6nh[rx[0][IPv6].nh], "ICMPv6") |
| self.assertEqual(rx[0][ICMPv6ND_NS].tgt, self.pg0.remote_ip6) |
| self.assertTrue(rx[0].haslayer(ICMPv6NDOptSrcLLAddr)) |
| self.assertEqual(rx[0][ICMPv6NDOptSrcLLAddr].lladdr, self.pg0.local_mac) |
| |
| # Resolve the NDs on the uplink |
| self.pg0.resolve_ndp() |
| |
| # |
| # Again send the unicast ND request, this time dst address should be |
| # in local cache |
| # |
| rx = self.send_and_expect(self.pg1, [unicast_nd_req_from_host], self.pg1) |
| self.assertEqual(rx[0][Ether].src, self.pg1.local_mac) |
| self.assertEqual(rx[0][Ether].dst, self.pg1.remote_mac) |
| self.assertEqual(rx[0][IPv6].src, self.pg0.remote_ip6) |
| self.assertEqual(in6_ptop(rx[0][IPv6].dst), in6_ptop(self.pg1.remote_ip6_ll)) |
| self.assertEqual(ipv6nh[rx[0][IPv6].nh], "ICMPv6") |
| self.assertEqual(rx[0][ICMPv6ND_NA].tgt, self.pg0.remote_ip6) |
| self.assertTrue(rx[0].haslayer(ICMPv6NDOptDstLLAddr)) |
| self.assertEqual(rx[0][ICMPv6NDOptDstLLAddr].lladdr, self.pg1.local_mac) |
| |
| # |
| # Send the Echo Request from host to remote (of uplink) |
| # |
| id = self.pg1.sw_if_index |
| seq = 0x1 |
| echo_request = ( |
| Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) |
| / IPv6(dst=self.pg0.remote_ip6, src=self.pg0.local_ip6) |
| / ICMPv6EchoRequest(seq=seq, id=id) |
| ) |
| |
| rx = self.send_and_expect(self.pg1, [echo_request], self.pg0) |
| self.assertEqual(rx[0][Ether].src, self.pg0.local_mac) |
| self.assertEqual(rx[0][Ether].dst, self.pg0.remote_mac) |
| self.assertEqual(rx[0][IPv6].src, self.pg0.local_ip6) |
| self.assertEqual(rx[0][IPv6].dst, self.pg0.remote_ip6) |
| self.assertEqual(ipv6nh[rx[0][IPv6].nh], "ICMPv6") |
| self.assertTrue(rx[0].haslayer(ICMPv6EchoRequest)) |
| self.assertEqual(rx[0][ICMPv6EchoRequest].id, id) |
| self.assertEqual(rx[0][ICMPv6EchoRequest].seq, seq) |
| |
| # |
| # setup a punt redirect so packets from the uplink go to the tap |
| # |
| redirect = VppIpPuntRedirect( |
| self, self.pg0.sw_if_index, self.pg1.sw_if_index, self.pg0.local_ip6 |
| ) |
| redirect.add_vpp_config() |
| |
| echo_reply = ( |
| Ether(dst=self.pg0.remote_mac, src=self.pg0.local_mac) |
| / IPv6(dst=self.pg0.local_ip6, src=self.pg0.remote_ip6) |
| / ICMPv6EchoReply(seq=1, id=id) |
| ) |
| |
| rx = self.send_and_expect(self.pg0, [echo_reply], self.pg1) |
| self.assertEqual(rx[0][Ether].src, self.pg1.local_mac) |
| self.assertEqual(rx[0][Ether].dst, self.pg1.remote_mac) |
| self.assertEqual(rx[0][IPv6].src, self.pg0.remote_ip6) |
| self.assertEqual(rx[0][IPv6].dst, self.pg0.local_ip6) |
| self.assertEqual(ipv6nh[rx[0][IPv6].nh], "ICMPv6") |
| self.assertTrue(rx[0].haslayer(ICMPv6EchoReply)) |
| self.assertEqual(rx[0][ICMPv6EchoReply].id, id) |
| self.assertEqual(rx[0][ICMPv6EchoReply].seq, seq) |
| |
| # |
| # cleanup |
| # |
| self.vapi.ip6nd_proxy_enable_disable( |
| sw_if_index=self.pg1.sw_if_index, is_enable=0 |
| ) |
| redirect.remove_vpp_config() |
| |
| |
| if __name__ == "__main__": |
| unittest.main(testRunner=VppTestRunner) |