698eb87a8e
VXLAN uses csum_offload for IPv6 packets. But without gso node we have csum calculated only for inner packet. This patch adds support for outer header csum calculation. Checksum for inner packet should be calculated before interface-output node (for example in vxlan node). Type: fix Signed-off-by: Mohsin Kazmi <sykazmi@cisco.com> Signed-off-by: Vladimir Isaev <visaev@netgate.com> Change-Id: Ica68429ede4426293769207cd83c791ebe72fe56
227 lines
8.2 KiB
Python
227 lines
8.2 KiB
Python
#!/usr/bin/env python3
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import socket
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import unittest
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from framework import VppTestCase, VppTestRunner
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from template_bd import BridgeDomain
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from scapy.layers.l2 import Ether
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from scapy.packet import Raw
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from scapy.layers.inet6 import IP, IPv6, UDP
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from scapy.layers.vxlan import VXLAN
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import util
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from vpp_ip_route import VppIpRoute, VppRoutePath
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from vpp_vxlan_tunnel import VppVxlanTunnel
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from vpp_ip import INVALID_INDEX
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class TestVxlan6(BridgeDomain, VppTestCase):
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""" VXLAN over IPv6 Test Case """
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def __init__(self, *args):
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BridgeDomain.__init__(self)
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VppTestCase.__init__(self, *args)
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def encapsulate(self, pkt, vni):
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"""
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Encapsulate the original payload frame by adding VXLAN header with its
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UDP, IP and Ethernet fields
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"""
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return (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
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IPv6(src=self.pg0.remote_ip6, dst=self.pg0.local_ip6) /
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UDP(sport=self.dport, dport=self.dport, chksum=0) /
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VXLAN(vni=vni, flags=self.flags) /
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pkt)
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@classmethod
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def ip_range(cls, s, e):
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""" range of remote ip's """
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tmp = cls.pg0.remote_ip6.rsplit(':', 1)[0]
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return ("%s:%x" % (tmp, i) for i in range(s, e))
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def encap_mcast(self, pkt, src_ip, src_mac, vni):
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"""
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Encapsulate the original payload frame by adding VXLAN header with its
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UDP, IP and Ethernet fields
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"""
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return (Ether(src=src_mac, dst=self.mcast_mac) /
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IPv6(src=src_ip, dst=self.mcast_ip6) /
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UDP(sport=self.dport, dport=self.dport, chksum=0) /
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VXLAN(vni=vni, flags=self.flags) /
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pkt)
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def decapsulate(self, pkt):
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"""
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Decapsulate the original payload frame by removing VXLAN header
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"""
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# check if is set I flag
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self.assertEqual(pkt[VXLAN].flags, int('0x8', 16))
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return pkt[VXLAN].payload
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# Method for checking VXLAN encapsulation.
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#
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def check_encapsulation(self, pkt, vni, local_only=False, mcast_pkt=False):
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# TODO: add error messages
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# Verify source MAC is VPP_MAC and destination MAC is MY_MAC resolved
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# by VPP using ARP.
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self.assertEqual(pkt[Ether].src, self.pg0.local_mac)
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if not local_only:
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if not mcast_pkt:
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self.assertEqual(pkt[Ether].dst, self.pg0.remote_mac)
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else:
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self.assertEqual(pkt[Ether].dst, type(self).mcast_mac)
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# Verify VXLAN tunnel source IP is VPP_IP and destination IP is MY_IP.
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self.assertEqual(pkt[IPv6].src, self.pg0.local_ip6)
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if not local_only:
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if not mcast_pkt:
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self.assertEqual(pkt[IPv6].dst, self.pg0.remote_ip6)
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else:
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self.assertEqual(pkt[IPv6].dst, type(self).mcast_ip6)
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# Verify UDP destination port is VXLAN 4789, source UDP port could be
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# arbitrary.
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self.assertEqual(pkt[UDP].dport, type(self).dport)
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# Verify UDP checksum
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self.assert_udp_checksum_valid(pkt, ignore_zero_checksum=False)
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# Verify VNI
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self.assertEqual(pkt[VXLAN].vni, vni)
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@classmethod
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def create_vxlan_flood_test_bd(cls, vni, n_ucast_tunnels):
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# Create 10 ucast vxlan tunnels under bd
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start = 10
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end = start + n_ucast_tunnels
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for dest_ip6 in cls.ip_range(start, end):
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# add host route so dest ip will not be resolved
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rip = VppIpRoute(cls, dest_ip6, 128,
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[VppRoutePath(cls.pg0.remote_ip6, INVALID_INDEX)],
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register=False)
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rip.add_vpp_config()
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r = VppVxlanTunnel(cls, src=cls.pg0.local_ip6,
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dst=dest_ip6, vni=vni)
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r.add_vpp_config()
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cls.vapi.sw_interface_set_l2_bridge(r.sw_if_index, bd_id=vni)
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@classmethod
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def add_mcast_tunnels_load(cls):
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cls.add_del_mcast_tunnels_load(is_add=1)
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@classmethod
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def del_mcast_tunnels_load(cls):
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cls.add_del_mcast_tunnels_load(is_add=0)
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# Class method to start the VXLAN test case.
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# Overrides setUpClass method in VppTestCase class.
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# Python try..except statement is used to ensure that the tear down of
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# the class will be executed even if exception is raised.
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# @param cls The class pointer.
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@classmethod
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def setUpClass(cls):
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super(TestVxlan6, cls).setUpClass()
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try:
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cls.dport = 4789
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cls.flags = 0x8
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# Create 2 pg interfaces.
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cls.create_pg_interfaces(range(4))
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for pg in cls.pg_interfaces:
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pg.admin_up()
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# Configure IPv6 addresses on VPP pg0.
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cls.pg0.config_ip6()
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# Resolve MAC address for VPP's IP address on pg0.
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cls.pg0.resolve_ndp()
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# Our Multicast address
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cls.mcast_ip6 = 'ff0e::1'
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cls.mcast_mac = util.mcast_ip_to_mac(cls.mcast_ip6)
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except Exception:
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super(TestVxlan6, cls).tearDownClass()
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raise
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@classmethod
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def tearDownClass(cls):
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super(TestVxlan6, cls).tearDownClass()
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def setUp(self):
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super(TestVxlan6, self).setUp()
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# Create VXLAN VTEP on VPP pg0, and put vxlan_tunnel0 and pg1
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# into BD.
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self.single_tunnel_vni = 0x12345
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self.single_tunnel_bd = 1
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r = VppVxlanTunnel(self, src=self.pg0.local_ip6,
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dst=self.pg0.remote_ip6,
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vni=self.single_tunnel_vni)
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r.add_vpp_config()
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self.vapi.sw_interface_set_l2_bridge(rx_sw_if_index=r.sw_if_index,
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bd_id=self.single_tunnel_bd)
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self.vapi.sw_interface_set_l2_bridge(
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rx_sw_if_index=self.pg1.sw_if_index, bd_id=self.single_tunnel_bd)
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# Setup vni 2 to test multicast flooding
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self.n_ucast_tunnels = 10
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self.mcast_flood_bd = 2
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self.create_vxlan_flood_test_bd(self.mcast_flood_bd,
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self.n_ucast_tunnels)
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r = VppVxlanTunnel(self, src=self.pg0.local_ip6, dst=self.mcast_ip6,
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mcast_sw_if_index=1, vni=self.mcast_flood_bd)
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r.add_vpp_config()
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self.vapi.sw_interface_set_l2_bridge(rx_sw_if_index=r.sw_if_index,
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bd_id=self.mcast_flood_bd)
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self.vapi.sw_interface_set_l2_bridge(
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rx_sw_if_index=self.pg2.sw_if_index, bd_id=self.mcast_flood_bd)
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# Setup vni 3 to test unicast flooding
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self.ucast_flood_bd = 3
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self.create_vxlan_flood_test_bd(self.ucast_flood_bd,
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self.n_ucast_tunnels)
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self.vapi.sw_interface_set_l2_bridge(
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rx_sw_if_index=self.pg3.sw_if_index, bd_id=self.ucast_flood_bd)
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# Method to define VPP actions before tear down of the test case.
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# Overrides tearDown method in VppTestCase class.
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# @param self The object pointer.
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def tearDown(self):
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super(TestVxlan6, self).tearDown()
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def show_commands_at_teardown(self):
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self.logger.info(self.vapi.cli("show bridge-domain 1 detail"))
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self.logger.info(self.vapi.cli("show bridge-domain 2 detail"))
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self.logger.info(self.vapi.cli("show bridge-domain 3 detail"))
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self.logger.info(self.vapi.cli("show vxlan tunnel"))
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def test_encap_fragmented_packet(self):
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""" Encapsulation test send fragments from pg1
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Verify receipt of encapsulated frames on pg0
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"""
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frame = (Ether(src='00:00:00:00:00:02', dst='00:00:00:00:00:01') /
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IP(src='4.3.2.1', dst='1.2.3.4') /
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UDP(sport=20000, dport=10000) /
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Raw(b'\xa5' * 1000))
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frags = util.fragment_rfc791(frame, 400)
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self.pg1.add_stream(frags)
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self.pg0.enable_capture()
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self.pg_start()
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out = self.pg0.get_capture(3)
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payload = []
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for pkt in out:
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payload.append(self.decapsulate(pkt))
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self.check_encapsulation(pkt, self.single_tunnel_vni)
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reassembled = util.reassemble4(payload)
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self.assertEqual(Ether(raw(frame))[IP], reassembled[IP])
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if __name__ == '__main__':
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unittest.main(testRunner=VppTestRunner)
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