+ #
+ # add all the interface addresses back
+ #
+ for p in intf_pfxs:
+ for v in p:
+ v.add_vpp_config()
+ for intf in self.pg_interfaces:
+ self.assertEqual(self.get_n_pfxs(intf), 3)
+
+ #
+ # replace again, but this time update/re-add the address on the first
+ # two interfaces
+ #
+ self.vapi.sw_interface_address_replace_begin()
+
+ for p in intf_pfxs[:2]:
+ for v in p:
+ v.add_vpp_config()
+
+ self.vapi.sw_interface_address_replace_end()
+
+ # on the first two the address still exist,
+ # on the other two they do not
+ for intf in self.pg_interfaces[:2]:
+ self.assertEqual(self.get_n_pfxs(intf), 3)
+ for p in intf_pfxs[:2]:
+ for v in p:
+ self.assertTrue(v.query_vpp_config())
+ for intf in self.pg_interfaces[2:]:
+ self.assertEqual(self.get_n_pfxs(intf), 0)
+
+ #
+ # add all the interface addresses back on the last two
+ #
+ for p in intf_pfxs[2:]:
+ for v in p:
+ v.add_vpp_config()
+ for intf in self.pg_interfaces:
+ self.assertEqual(self.get_n_pfxs(intf), 3)
+
+ #
+ # replace again, this time add different prefixes on all the interfaces
+ #
+ self.vapi.sw_interface_address_replace_begin()
+
+ pfxs = []
+ for intf in self.pg_interfaces:
+ # 2001:18:x::1/64
+ addr = "2001:18:%d::1" % intf.sw_if_index
+ pfxs.append(VppIpInterfaceAddress(self, intf, addr,
+ 64).add_vpp_config())
+
+ self.vapi.sw_interface_address_replace_end()
+
+ # only .18 should exist on each interface
+ for intf in self.pg_interfaces:
+ self.assertEqual(self.get_n_pfxs(intf), 1)
+ for pfx in pfxs:
+ self.assertTrue(pfx.query_vpp_config())
+
+ #
+ # remove everything
+ #
+ self.vapi.sw_interface_address_replace_begin()
+ self.vapi.sw_interface_address_replace_end()
+ for intf in self.pg_interfaces:
+ self.assertEqual(self.get_n_pfxs(intf), 0)
+
+ #
+ # add prefixes to each interface. post-begin add the prefix from
+ # interface X onto interface Y. this would normally be an error
+ # since it would generate a 'duplicate address' warning. but in
+ # this case, since what is newly downloaded is sane, it's ok
+ #
+ for intf in self.pg_interfaces:
+ # 2001:18:x::1/64
+ addr = "2001:18:%d::1" % intf.sw_if_index
+ VppIpInterfaceAddress(self, intf, addr, 64).add_vpp_config()
+
+ self.vapi.sw_interface_address_replace_begin()
+
+ pfxs = []
+ for intf in self.pg_interfaces:
+ # 2001:18:x::1/64
+ addr = "2001:18:%d::1" % (intf.sw_if_index + 1)
+ pfxs.append(VppIpInterfaceAddress(self, intf,
+ addr, 64).add_vpp_config())
+
+ self.vapi.sw_interface_address_replace_end()
+
+ self.logger.info(self.vapi.cli("sh int addr"))
+
+ for intf in self.pg_interfaces:
+ self.assertEqual(self.get_n_pfxs(intf), 1)
+ for pfx in pfxs:
+ self.assertTrue(pfx.query_vpp_config())
+
+
+class TestIP6LinkLocal(VppTestCase):
+ """ IPv6 Link Local """
+
+ @classmethod
+ def setUpClass(cls):
+ super(TestIP6LinkLocal, cls).setUpClass()
+
+ @classmethod
+ def tearDownClass(cls):
+ super(TestIP6LinkLocal, cls).tearDownClass()
+
+ def setUp(self):
+ super(TestIP6LinkLocal, self).setUp()
+
+ self.create_pg_interfaces(range(2))
+
+ for i in self.pg_interfaces:
+ i.admin_up()
+
+ def tearDown(self):
+ super(TestIP6LinkLocal, self).tearDown()
+ for i in self.pg_interfaces:
+ i.admin_down()
+
+ def test_ip6_ll(self):
+ """ IPv6 Link Local """
+
+ #
+ # two APIs to add a link local address.
+ # 1 - just like any other prefix
+ # 2 - with the special set LL API
+ #
+
+ #
+ # First with the API to set a 'normal' prefix
+ #
+ ll1 = "fe80:1::1"
+ ll2 = "fe80:2::2"
+ ll3 = "fe80:3::3"
+
+ VppIpInterfaceAddress(self, self.pg0, ll1, 128).add_vpp_config()
+
+ #
+ # should be able to ping the ll
+ #
+ p_echo_request_1 = (Ether(src=self.pg0.remote_mac,
+ dst=self.pg0.local_mac) /
+ IPv6(src=ll2,
+ dst=ll1) /
+ ICMPv6EchoRequest())
+
+ self.send_and_expect(self.pg0, [p_echo_request_1], self.pg0)
+
+ #
+ # change the link-local on pg0
+ #
+ v_ll3 = VppIpInterfaceAddress(self, self.pg0,
+ ll3, 128).add_vpp_config()
+
+ p_echo_request_3 = (Ether(src=self.pg0.remote_mac,
+ dst=self.pg0.local_mac) /
+ IPv6(src=ll2,
+ dst=ll3) /
+ ICMPv6EchoRequest())
+
+ self.send_and_expect(self.pg0, [p_echo_request_3], self.pg0)
+
+ #
+ # set a normal v6 prefix on the link
+ #
+ self.pg0.config_ip6()
+
+ self.send_and_expect(self.pg0, [p_echo_request_3], self.pg0)
+
+ # the link-local cannot be removed
+ with self.vapi.assert_negative_api_retval():
+ v_ll3.remove_vpp_config()
+
+ #
+ # Use the specific link-local API on pg1
+ #
+ VppIp6LinkLocalAddress(self, self.pg1, ll1).add_vpp_config()
+ self.send_and_expect(self.pg1, [p_echo_request_1], self.pg1)
+
+ VppIp6LinkLocalAddress(self, self.pg1, ll3).add_vpp_config()
+ self.send_and_expect(self.pg1, [p_echo_request_3], self.pg1)
+
+
+class TestIPv6PathMTU(VppTestCase):
+ """ IPv6 Path MTU """
+
+ def setUp(self):
+ super(TestIPv6PathMTU, self).setUp()
+
+ self.create_pg_interfaces(range(2))
+
+ # setup all interfaces
+ for i in self.pg_interfaces:
+ i.admin_up()
+ i.config_ip6()
+ i.resolve_ndp()
+
+ def tearDown(self):
+ super(TestIPv6PathMTU, self).tearDown()
+ for i in self.pg_interfaces:
+ i.unconfig_ip6()
+ i.admin_down()
+
+ def test_path_mtu_local(self):
+ """ Path MTU for attached neighbour """
+
+ self.vapi.cli("set log class ip level debug")
+ #
+ # The goal here is not test that fragmentation works correctly,
+ # that's done elsewhere, the intent is to ensure that the Path MTU
+ # settings are honoured.
+ #
+
+ #
+ # IPv6 will only frag locally generated packets, so use tunnelled
+ # packets post encap
+ #
+ tun = VppIpIpTunInterface(
+ self,
+ self.pg1,
+ self.pg1.local_ip6,
+ self.pg1.remote_ip6)
+ tun.add_vpp_config()
+ tun.admin_up()
+ tun.config_ip6()
+
+ # set the interface MTU to a reasonable value
+ self.vapi.sw_interface_set_mtu(self.pg1.sw_if_index,
+ [2800, 0, 0, 0])
+
+ p_2k = (Ether(dst=self.pg0.local_mac,
+ src=self.pg0.remote_mac) /
+ IPv6(src=self.pg0.remote_ip6,
+ dst=tun.remote_ip6) /
+ UDP(sport=1234, dport=5678) /
+ Raw(b'0xa' * 1000))
+ p_1k = (Ether(dst=self.pg0.local_mac,
+ src=self.pg0.remote_mac) /
+ IPv6(src=self.pg0.remote_ip6,
+ dst=tun.remote_ip6) /
+ UDP(sport=1234, dport=5678) /
+ Raw(b'0xa' * 600))
+
+ nbr = VppNeighbor(self,
+ self.pg1.sw_if_index,
+ self.pg1.remote_mac,
+ self.pg1.remote_ip6).add_vpp_config()
+
+ # this is now the interface MTU frags
+ self.send_and_expect(self.pg0, [p_2k], self.pg1, n_rx=2)
+ self.send_and_expect(self.pg0, [p_1k], self.pg1)
+
+ # drop the path MTU for this neighbour to below the interface MTU
+ # expect more frags
+ pmtu = VppIpPathMtu(self, self.pg1.remote_ip6, 1300).add_vpp_config()
+
+ # print/format the adj delegate and trackers
+ self.logger.info(self.vapi.cli("sh ip pmtu"))
+ self.logger.info(self.vapi.cli("sh adj 7"))
+
+ self.send_and_expect(self.pg0, [p_2k], self.pg1, n_rx=3)
+ self.send_and_expect(self.pg0, [p_1k], self.pg1, n_rx=2)
+
+ # increase the path MTU to more than the interface
+ # expect to use the interface MTU
+ pmtu.modify(8192)
+
+ self.send_and_expect(self.pg0, [p_2k], self.pg1, n_rx=2)
+ self.send_and_expect(self.pg0, [p_1k], self.pg1)
+
+ # go back to an MTU from the path
+ pmtu.modify(1300)
+
+ self.send_and_expect(self.pg0, [p_2k], self.pg1, n_rx=3)
+ self.send_and_expect(self.pg0, [p_1k], self.pg1, n_rx=2)
+
+ # raise the interface's MTU
+ # should still use that of the path
+ self.vapi.sw_interface_set_mtu(self.pg1.sw_if_index,
+ [2000, 0, 0, 0])
+ self.send_and_expect(self.pg0, [p_2k], self.pg1, n_rx=3)
+ self.send_and_expect(self.pg0, [p_1k], self.pg1, n_rx=2)
+
+ # set path high and interface low
+ pmtu.modify(2000)
+ self.vapi.sw_interface_set_mtu(self.pg1.sw_if_index,
+ [1300, 0, 0, 0])
+ self.send_and_expect(self.pg0, [p_2k], self.pg1, n_rx=3)
+ self.send_and_expect(self.pg0, [p_1k], self.pg1, n_rx=2)
+
+ # remove the path MTU
+ self.vapi.sw_interface_set_mtu(self.pg1.sw_if_index,
+ [2800, 0, 0, 0])
+ pmtu.modify(0)
+
+ self.send_and_expect(self.pg0, [p_2k], self.pg1, n_rx=2)
+ self.send_and_expect(self.pg0, [p_1k], self.pg1)
+
+ def test_path_mtu_remote(self):
+ """ Path MTU for remote neighbour """
+
+ self.vapi.cli("set log class ip level debug")
+ #
+ # The goal here is not test that fragmentation works correctly,
+ # that's done elsewhere, the intent is to ensure that the Path MTU
+ # settings are honoured.
+ #
+ tun_dst = "2001::1"
+
+ route = VppIpRoute(
+ self, tun_dst, 64,
+ [VppRoutePath(self.pg1.remote_ip6,
+ self.pg1.sw_if_index)]).add_vpp_config()
+
+ #
+ # IPv6 will only frag locally generated packets, so use tunnelled
+ # packets post encap
+ #
+ tun = VppIpIpTunInterface(
+ self,
+ self.pg1,
+ self.pg1.local_ip6,
+ tun_dst)
+ tun.add_vpp_config()
+ tun.admin_up()
+ tun.config_ip6()
+
+ # set the interface MTU to a reasonable value
+ self.vapi.sw_interface_set_mtu(self.pg1.sw_if_index,
+ [2800, 0, 0, 0])
+
+ p_2k = (Ether(dst=self.pg0.local_mac,
+ src=self.pg0.remote_mac) /
+ IPv6(src=self.pg0.remote_ip6,
+ dst=tun.remote_ip6) /
+ UDP(sport=1234, dport=5678) /
+ Raw(b'0xa' * 1000))
+ p_1k = (Ether(dst=self.pg0.local_mac,
+ src=self.pg0.remote_mac) /
+ IPv6(src=self.pg0.remote_ip6,
+ dst=tun.remote_ip6) /
+ UDP(sport=1234, dport=5678) /
+ Raw(b'0xa' * 600))
+
+ nbr = VppNeighbor(self,
+ self.pg1.sw_if_index,
+ self.pg1.remote_mac,
+ self.pg1.remote_ip6).add_vpp_config()
+
+ # this is now the interface MTU frags
+ self.send_and_expect(self.pg0, [p_2k], self.pg1, n_rx=2)
+ self.send_and_expect(self.pg0, [p_1k], self.pg1)
+
+ # drop the path MTU for this neighbour to below the interface MTU
+ # expect more frags
+ pmtu = VppIpPathMtu(self, tun_dst, 1300).add_vpp_config()
+
+ # print/format the fib entry/dpo
+ self.logger.info(self.vapi.cli("sh ip6 fib 2001::1"))
+
+ self.send_and_expect(self.pg0, [p_2k], self.pg1, n_rx=3)
+ self.send_and_expect(self.pg0, [p_1k], self.pg1, n_rx=2)
+
+ # increase the path MTU to more than the interface
+ # expect to use the interface MTU
+ pmtu.modify(8192)
+
+ self.send_and_expect(self.pg0, [p_2k], self.pg1, n_rx=2)
+ self.send_and_expect(self.pg0, [p_1k], self.pg1)
+
+ # go back to an MTU from the path
+ pmtu.modify(1300)
+
+ self.send_and_expect(self.pg0, [p_2k], self.pg1, n_rx=3)
+ self.send_and_expect(self.pg0, [p_1k], self.pg1, n_rx=2)
+
+ # raise the interface's MTU
+ # should still use that of the path
+ self.vapi.sw_interface_set_mtu(self.pg1.sw_if_index,
+ [2000, 0, 0, 0])
+ self.send_and_expect(self.pg0, [p_2k], self.pg1, n_rx=3)
+ self.send_and_expect(self.pg0, [p_1k], self.pg1, n_rx=2)
+
+ # turn the tun_dst into an attached neighbour
+ route.modify([VppRoutePath("::",
+ self.pg1.sw_if_index)])
+ nbr2 = VppNeighbor(self,
+ self.pg1.sw_if_index,
+ self.pg1.remote_mac,
+ tun_dst).add_vpp_config()
+
+ self.send_and_expect(self.pg0, [p_2k], self.pg1, n_rx=3)
+ self.send_and_expect(self.pg0, [p_1k], self.pg1, n_rx=2)
+
+ # add back to not attached
+ nbr2.remove_vpp_config()
+ route.modify([VppRoutePath(self.pg1.remote_ip6,
+ self.pg1.sw_if_index)])
+
+ # set path high and interface low
+ pmtu.modify(2000)
+ self.vapi.sw_interface_set_mtu(self.pg1.sw_if_index,
+ [1300, 0, 0, 0])
+ self.send_and_expect(self.pg0, [p_2k], self.pg1, n_rx=3)
+ self.send_and_expect(self.pg0, [p_1k], self.pg1, n_rx=2)
+
+ # remove the path MTU
+ self.vapi.sw_interface_set_mtu(self.pg1.sw_if_index,
+ [2800, 0, 0, 0])
+ pmtu.remove_vpp_config()
+ self.send_and_expect(self.pg0, [p_2k], self.pg1, n_rx=2)
+ self.send_and_expect(self.pg0, [p_1k], self.pg1)