| #!/usr/bin/env python3 |
| |
| import socket |
| import unittest |
| from framework import VppTestCase, VppTestRunner |
| from template_bd import BridgeDomain |
| |
| from scapy.layers.l2 import Ether |
| from scapy.packet import Raw |
| from scapy.layers.inet6 import IP, IPv6, UDP |
| from scapy.layers.vxlan import VXLAN |
| |
| import util |
| from vpp_ip_route import VppIpRoute, VppRoutePath |
| from vpp_vxlan_tunnel import VppVxlanTunnel |
| from vpp_ip import INVALID_INDEX |
| |
| |
| class TestVxlan6(BridgeDomain, VppTestCase): |
| """ VXLAN over IPv6 Test Case """ |
| |
| def __init__(self, *args): |
| BridgeDomain.__init__(self) |
| VppTestCase.__init__(self, *args) |
| |
| def encapsulate(self, pkt, vni): |
| """ |
| Encapsulate the original payload frame by adding VXLAN header with its |
| UDP, IP and Ethernet fields |
| """ |
| return (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / |
| IPv6(src=self.pg0.remote_ip6, dst=self.pg0.local_ip6) / |
| UDP(sport=self.dport, dport=self.dport, chksum=0) / |
| VXLAN(vni=vni, flags=self.flags) / |
| pkt) |
| |
| @classmethod |
| def ip_range(cls, s, e): |
| """ range of remote ip's """ |
| tmp = cls.pg0.remote_ip6.rsplit(':', 1)[0] |
| return ("%s:%x" % (tmp, i) for i in range(s, e)) |
| |
| def encap_mcast(self, pkt, src_ip, src_mac, vni): |
| """ |
| Encapsulate the original payload frame by adding VXLAN header with its |
| UDP, IP and Ethernet fields |
| """ |
| return (Ether(src=src_mac, dst=self.mcast_mac) / |
| IPv6(src=src_ip, dst=self.mcast_ip6) / |
| UDP(sport=self.dport, dport=self.dport, chksum=0) / |
| VXLAN(vni=vni, flags=self.flags) / |
| pkt) |
| |
| def decapsulate(self, pkt): |
| """ |
| Decapsulate the original payload frame by removing VXLAN header |
| """ |
| # check if is set I flag |
| self.assertEqual(pkt[VXLAN].flags, int('0x8', 16)) |
| return pkt[VXLAN].payload |
| |
| # Method for checking VXLAN encapsulation. |
| # |
| def check_encapsulation(self, pkt, vni, local_only=False, mcast_pkt=False): |
| # TODO: add error messages |
| # Verify source MAC is VPP_MAC and destination MAC is MY_MAC resolved |
| # by VPP using ARP. |
| self.assertEqual(pkt[Ether].src, self.pg0.local_mac) |
| if not local_only: |
| if not mcast_pkt: |
| self.assertEqual(pkt[Ether].dst, self.pg0.remote_mac) |
| else: |
| self.assertEqual(pkt[Ether].dst, type(self).mcast_mac) |
| # Verify VXLAN tunnel source IP is VPP_IP and destination IP is MY_IP. |
| self.assertEqual(pkt[IPv6].src, self.pg0.local_ip6) |
| if not local_only: |
| if not mcast_pkt: |
| self.assertEqual(pkt[IPv6].dst, self.pg0.remote_ip6) |
| else: |
| self.assertEqual(pkt[IPv6].dst, type(self).mcast_ip6) |
| # Verify UDP destination port is VXLAN 4789, source UDP port could be |
| # arbitrary. |
| self.assertEqual(pkt[UDP].dport, type(self).dport) |
| # Verify UDP checksum |
| self.assert_udp_checksum_valid(pkt, ignore_zero_checksum=False) |
| # Verify VNI |
| self.assertEqual(pkt[VXLAN].vni, vni) |
| |
| @classmethod |
| def create_vxlan_flood_test_bd(cls, vni, n_ucast_tunnels): |
| # Create 10 ucast vxlan tunnels under bd |
| start = 10 |
| end = start + n_ucast_tunnels |
| for dest_ip6 in cls.ip_range(start, end): |
| # add host route so dest ip will not be resolved |
| rip = VppIpRoute(cls, dest_ip6, 128, |
| [VppRoutePath(cls.pg0.remote_ip6, INVALID_INDEX)], |
| register=False) |
| rip.add_vpp_config() |
| r = VppVxlanTunnel(cls, src=cls.pg0.local_ip6, |
| dst=dest_ip6, vni=vni) |
| r.add_vpp_config() |
| cls.vapi.sw_interface_set_l2_bridge(r.sw_if_index, bd_id=vni) |
| |
| @classmethod |
| def add_mcast_tunnels_load(cls): |
| cls.add_del_mcast_tunnels_load(is_add=1) |
| |
| @classmethod |
| def del_mcast_tunnels_load(cls): |
| cls.add_del_mcast_tunnels_load(is_add=0) |
| |
| # Class method to start the VXLAN test case. |
| # Overrides setUpClass method in VppTestCase class. |
| # Python try..except statement is used to ensure that the tear down of |
| # the class will be executed even if exception is raised. |
| # @param cls The class pointer. |
| @classmethod |
| def setUpClass(cls): |
| super(TestVxlan6, cls).setUpClass() |
| |
| try: |
| cls.dport = 4789 |
| cls.flags = 0x8 |
| |
| # Create 2 pg interfaces. |
| cls.create_pg_interfaces(range(4)) |
| for pg in cls.pg_interfaces: |
| pg.admin_up() |
| |
| # Configure IPv6 addresses on VPP pg0. |
| cls.pg0.config_ip6() |
| |
| # Resolve MAC address for VPP's IP address on pg0. |
| cls.pg0.resolve_ndp() |
| |
| # Our Multicast address |
| cls.mcast_ip6 = 'ff0e::1' |
| cls.mcast_mac = util.mcast_ip_to_mac(cls.mcast_ip6) |
| except Exception: |
| super(TestVxlan6, cls).tearDownClass() |
| raise |
| |
| @classmethod |
| def tearDownClass(cls): |
| super(TestVxlan6, cls).tearDownClass() |
| |
| def setUp(self): |
| super(TestVxlan6, self).setUp() |
| # Create VXLAN VTEP on VPP pg0, and put vxlan_tunnel0 and pg1 |
| # into BD. |
| self.single_tunnel_vni = 0x12345 |
| self.single_tunnel_bd = 1 |
| r = VppVxlanTunnel(self, src=self.pg0.local_ip6, |
| dst=self.pg0.remote_ip6, |
| vni=self.single_tunnel_vni) |
| r.add_vpp_config() |
| self.vapi.sw_interface_set_l2_bridge(rx_sw_if_index=r.sw_if_index, |
| bd_id=self.single_tunnel_bd) |
| self.vapi.sw_interface_set_l2_bridge( |
| rx_sw_if_index=self.pg1.sw_if_index, bd_id=self.single_tunnel_bd) |
| |
| # Setup vni 2 to test multicast flooding |
| self.n_ucast_tunnels = 10 |
| self.mcast_flood_bd = 2 |
| self.create_vxlan_flood_test_bd(self.mcast_flood_bd, |
| self.n_ucast_tunnels) |
| r = VppVxlanTunnel(self, src=self.pg0.local_ip6, dst=self.mcast_ip6, |
| mcast_sw_if_index=1, vni=self.mcast_flood_bd) |
| r.add_vpp_config() |
| self.vapi.sw_interface_set_l2_bridge(rx_sw_if_index=r.sw_if_index, |
| bd_id=self.mcast_flood_bd) |
| self.vapi.sw_interface_set_l2_bridge( |
| rx_sw_if_index=self.pg2.sw_if_index, bd_id=self.mcast_flood_bd) |
| |
| # Setup vni 3 to test unicast flooding |
| self.ucast_flood_bd = 3 |
| self.create_vxlan_flood_test_bd(self.ucast_flood_bd, |
| self.n_ucast_tunnels) |
| self.vapi.sw_interface_set_l2_bridge( |
| rx_sw_if_index=self.pg3.sw_if_index, bd_id=self.ucast_flood_bd) |
| |
| # Method to define VPP actions before tear down of the test case. |
| # Overrides tearDown method in VppTestCase class. |
| # @param self The object pointer. |
| def tearDown(self): |
| super(TestVxlan6, self).tearDown() |
| |
| def show_commands_at_teardown(self): |
| self.logger.info(self.vapi.cli("show bridge-domain 1 detail")) |
| self.logger.info(self.vapi.cli("show bridge-domain 2 detail")) |
| self.logger.info(self.vapi.cli("show bridge-domain 3 detail")) |
| self.logger.info(self.vapi.cli("show vxlan tunnel")) |
| |
| def test_encap_fragmented_packet(self): |
| """ Encapsulation test send fragments from pg1 |
| Verify receipt of encapsulated frames on pg0 |
| """ |
| |
| frame = (Ether(src='00:00:00:00:00:02', dst='00:00:00:00:00:01') / |
| IP(src='4.3.2.1', dst='1.2.3.4') / |
| UDP(sport=20000, dport=10000) / |
| Raw(b'\xa5' * 1000)) |
| |
| frags = util.fragment_rfc791(frame, 400) |
| |
| self.pg1.add_stream(frags) |
| |
| self.pg0.enable_capture() |
| |
| self.pg_start() |
| |
| out = self.pg0.get_capture(3) |
| |
| payload = [] |
| for pkt in out: |
| payload.append(self.decapsulate(pkt)) |
| self.check_encapsulation(pkt, self.single_tunnel_vni) |
| |
| reassembled = util.reassemble4(payload) |
| |
| self.assertEqual(Ether(raw(frame))[IP], reassembled[IP]) |
| |
| |
| if __name__ == '__main__': |
| unittest.main(testRunner=VppTestRunner) |