e4238aa34f
When the NIC does not support mac filter, we rely on ethernet-input node to do the destination mac check, ie, when the interface is in L3, the mac address for the packet must be the mac address of the interface where the packet arrives. This works fine in ethernet-input node when all packets in the frame might have different interfaces, ie, ETH_INPUT_FRAME_F_SINGLE_SW_IF_ID is not set in the frame. However, when all packets are having the same interface, ETH_INPUT_FRAME_F_SINGLE_SW_IF_ID is set, ethernet-input node goes through the optimized routine eth_input_single_int -> eth_input_process_frame. That is where dmac check has a bug when all packets in the frame are either, ip4, ip6, or mpls without vlan tags. Because without vlan tags, the code handles all packets in fast path and ignores dmac check. With vlan tags, the code goes to slow path where dmac check is handled properly. The fix is to check if we have a bad dmac in the fast path and force the code to go to slow path which will handle dmac check properly. Also do a wholesale correction on all the testcases which do not use the proper dmac when sending L3 packets. Type: fix Change-Id: I73153a805cecdc24c4eefcc781676de04737ae2c Signed-off-by: Steven Luong <sluong@cisco.com>
190 lines
6.8 KiB
Python
190 lines
6.8 KiB
Python
#!/usr/bin/env python3
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import unittest
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from socket import inet_pton, inet_ntop
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from framework import VppTestCase
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from asfframework import VppTestRunner
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from vpp_ip import VppIpPuntRedirect
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from scapy.layers.l2 import Ether
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from scapy.layers.inet6 import (
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IPv6,
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ipv6nh,
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ICMPv6ND_NS,
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ICMPv6ND_NA,
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ICMPv6NDOptSrcLLAddr,
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ICMPv6NDOptDstLLAddr,
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ICMPv6EchoRequest,
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ICMPv6EchoReply,
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)
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from scapy.utils6 import in6_ptop, in6_getnsma, in6_getnsmac
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class TestNDPROXY(VppTestCase):
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"""IP6 ND (mirror) Proxy Test Case"""
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@classmethod
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def setUpClass(self):
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super(TestNDPROXY, self).setUpClass()
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self.create_pg_interfaces(range(2))
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@classmethod
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def tearDownClass(self):
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super(TestNDPROXY, self).tearDownClass()
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def setUp(self):
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super(TestNDPROXY, self).setUp()
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for i in self.pg_interfaces:
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i.admin_up()
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i.config_ip6()
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i.disable_ipv6_ra()
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def tearDown(self):
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super(TestNDPROXY, self).tearDown()
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if not self.vpp_dead:
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for i in self.pg_interfaces:
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i.unconfig_ip6()
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i.admin_down()
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def test_nd_mirror_proxy(self):
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"""Interface (Mirror) Proxy ND"""
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#
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# When VPP has an interface whose address is also applied to a TAP
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# interface on the host, then VPP's TAP interface will be unnumbered
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# to the 'real' interface and do proxy ND from the host.
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# the curious aspect of this setup is that ND requests from the host
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# will come from the VPP's own address.
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#
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addr = self.pg0.remote_ip6
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nsma = in6_getnsma(inet_pton(socket.AF_INET6, addr))
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d = inet_ntop(socket.AF_INET6, nsma)
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# Make pg1 un-numbered to pg0
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#
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self.pg1.unconfig_ip6()
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self.pg1.set_unnumbered(self.pg0.sw_if_index)
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#
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# Enable ND proxy on pg1
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#
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self.vapi.ip6nd_proxy_enable_disable(
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sw_if_index=self.pg1.sw_if_index, is_enable=1
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)
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#
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# Send the ND request with an originating address that
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# is VPP's own address
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#
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nd_req_from_host = (
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Ether(src=self.pg1.remote_mac, dst=in6_getnsmac(nsma))
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/ IPv6(dst=d, src=self.pg0.local_ip6)
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/ ICMPv6ND_NS(tgt=addr)
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/ ICMPv6NDOptSrcLLAddr(lladdr=self.pg1.remote_mac)
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)
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rx = self.send_and_expect(self.pg1, [nd_req_from_host], self.pg1)
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self.assertEqual(rx[0][Ether].src, self.pg1.local_mac)
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self.assertEqual(rx[0][Ether].dst, self.pg1.remote_mac)
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self.assertEqual(rx[0][IPv6].src, self.pg0.remote_ip6)
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self.assertEqual(rx[0][IPv6].dst, self.pg0.local_ip6)
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self.assertEqual(ipv6nh[rx[0][IPv6].nh], "ICMPv6")
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self.assertEqual(rx[0][ICMPv6ND_NA].tgt, self.pg0.remote_ip6)
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self.assertTrue(rx[0].haslayer(ICMPv6NDOptDstLLAddr))
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self.assertEqual(rx[0][ICMPv6NDOptDstLLAddr].lladdr, self.pg1.local_mac)
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#
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# Send the unicast ND request
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#
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unicast_nd_req_from_host = (
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Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac)
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/ IPv6(dst=self.pg0.remote_ip6, src=self.pg1.remote_ip6_ll)
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/ ICMPv6ND_NS(tgt=self.pg0.remote_ip6)
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/ ICMPv6NDOptSrcLLAddr(lladdr=self.pg1.remote_mac)
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)
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rx = self.send_and_expect(self.pg1, [unicast_nd_req_from_host], self.pg0)
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self.assertEqual(rx[0][Ether].src, self.pg0.local_mac)
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self.assertEqual(rx[0][Ether].dst, in6_getnsmac(nsma))
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self.assertEqual(rx[0][IPv6].src, self.pg0.local_ip6_ll)
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self.assertEqual(rx[0][IPv6].dst, d)
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self.assertEqual(ipv6nh[rx[0][IPv6].nh], "ICMPv6")
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self.assertEqual(rx[0][ICMPv6ND_NS].tgt, self.pg0.remote_ip6)
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self.assertTrue(rx[0].haslayer(ICMPv6NDOptSrcLLAddr))
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self.assertEqual(rx[0][ICMPv6NDOptSrcLLAddr].lladdr, self.pg0.local_mac)
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# Resolve the NDs on the uplink
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self.pg0.resolve_ndp()
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#
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# Again send the unicast ND request, this time dst address should be
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# in local cache
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#
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rx = self.send_and_expect(self.pg1, [unicast_nd_req_from_host], self.pg1)
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self.assertEqual(rx[0][Ether].src, self.pg1.local_mac)
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self.assertEqual(rx[0][Ether].dst, self.pg1.remote_mac)
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self.assertEqual(rx[0][IPv6].src, self.pg0.remote_ip6)
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self.assertEqual(in6_ptop(rx[0][IPv6].dst), in6_ptop(self.pg1.remote_ip6_ll))
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self.assertEqual(ipv6nh[rx[0][IPv6].nh], "ICMPv6")
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self.assertEqual(rx[0][ICMPv6ND_NA].tgt, self.pg0.remote_ip6)
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self.assertTrue(rx[0].haslayer(ICMPv6NDOptDstLLAddr))
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self.assertEqual(rx[0][ICMPv6NDOptDstLLAddr].lladdr, self.pg1.local_mac)
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#
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# Send the Echo Request from host to remote (of uplink)
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#
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id = self.pg1.sw_if_index
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seq = 0x1
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echo_request = (
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Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac)
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/ IPv6(dst=self.pg0.remote_ip6, src=self.pg0.local_ip6)
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/ ICMPv6EchoRequest(seq=seq, id=id)
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)
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rx = self.send_and_expect(self.pg1, [echo_request], self.pg0)
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self.assertEqual(rx[0][Ether].src, self.pg0.local_mac)
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self.assertEqual(rx[0][Ether].dst, self.pg0.remote_mac)
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self.assertEqual(rx[0][IPv6].src, self.pg0.local_ip6)
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self.assertEqual(rx[0][IPv6].dst, self.pg0.remote_ip6)
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self.assertEqual(ipv6nh[rx[0][IPv6].nh], "ICMPv6")
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self.assertTrue(rx[0].haslayer(ICMPv6EchoRequest))
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self.assertEqual(rx[0][ICMPv6EchoRequest].id, id)
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self.assertEqual(rx[0][ICMPv6EchoRequest].seq, seq)
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#
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# setup a punt redirect so packets from the uplink go to the tap
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#
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redirect = VppIpPuntRedirect(
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self, self.pg0.sw_if_index, self.pg1.sw_if_index, self.pg0.local_ip6
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)
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redirect.add_vpp_config()
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echo_reply = (
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Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac)
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/ IPv6(dst=self.pg0.local_ip6, src=self.pg0.remote_ip6)
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/ ICMPv6EchoReply(seq=1, id=id)
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)
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rx = self.send_and_expect(self.pg0, [echo_reply], self.pg1)
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self.assertEqual(rx[0][Ether].src, self.pg1.local_mac)
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self.assertEqual(rx[0][Ether].dst, self.pg1.remote_mac)
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self.assertEqual(rx[0][IPv6].src, self.pg0.remote_ip6)
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self.assertEqual(rx[0][IPv6].dst, self.pg0.local_ip6)
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self.assertEqual(ipv6nh[rx[0][IPv6].nh], "ICMPv6")
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self.assertTrue(rx[0].haslayer(ICMPv6EchoReply))
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self.assertEqual(rx[0][ICMPv6EchoReply].id, id)
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self.assertEqual(rx[0][ICMPv6EchoReply].seq, seq)
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#
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# cleanup
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#
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self.vapi.ip6nd_proxy_enable_disable(
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sw_if_index=self.pg1.sw_if_index, is_enable=0
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)
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redirect.remove_vpp_config()
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if __name__ == "__main__":
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unittest.main(testRunner=VppTestRunner)
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