#!/usr/bin/env python3 import socket from util import ip4_range, reassemble4 import unittest from framework import VppTestCase, VppTestRunner from template_bd import BridgeDomain from scapy.layers.l2 import Ether from scapy.layers.l2 import ARP from scapy.packet import Raw, bind_layers from scapy.layers.inet import IP, 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 from vpp_neighbor import VppNeighbor class TestVxlan(BridgeDomain, VppTestCase): """ VXLAN 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) / IP(src=self.pg0.remote_ip4, dst=self.pg0.local_ip4) / UDP(sport=self.dport, dport=self.dport, chksum=0) / VXLAN(vni=vni, flags=self.flags) / pkt) def ip_range(self, start, end): """ range of remote ip's """ return ip4_range(self.pg0.remote_ip4, start, end) 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) / IP(src=src_ip, dst=self.mcast_ip4) / 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[IP].src, self.pg0.local_ip4) if not local_only: if not mcast_pkt: self.assertEqual(pkt[IP].dst, self.pg0.remote_ip4) else: self.assertEqual(pkt[IP].dst, type(self).mcast_ip4) # Verify UDP destination port is VXLAN 4789, source UDP port could be # arbitrary. self.assertEqual(pkt[UDP].dport, self.dport) # Verify UDP checksum self.assert_udp_checksum_valid(pkt) # Verify VNI self.assertEqual(pkt[VXLAN].vni, vni) @classmethod def create_vxlan_flood_test_bd(cls, vni, n_ucast_tunnels, port): # Create 10 ucast vxlan tunnels under bd ip_range_start = 10 ip_range_end = ip_range_start + n_ucast_tunnels next_hop_address = cls.pg0.remote_ip4 for dest_ip4 in ip4_range(next_hop_address, ip_range_start, ip_range_end): # add host route so dest_ip4 will not be resolved rip = VppIpRoute(cls, dest_ip4, 32, [VppRoutePath(next_hop_address, INVALID_INDEX)], register=False) rip.add_vpp_config() r = VppVxlanTunnel(cls, src=cls.pg0.local_ip4, src_port=port, dst_port=port, dst=dest_ip4, vni=vni) r.add_vpp_config() cls.vapi.sw_interface_set_l2_bridge(r.sw_if_index, bd_id=vni) @classmethod def add_del_shared_mcast_dst_load(cls, port, is_add): """ add or del tunnels sharing the same mcast dst to test vxlan ref_count mechanism """ n_shared_dst_tunnels = 20 vni_start = 10000 vni_end = vni_start + n_shared_dst_tunnels for vni in range(vni_start, vni_end): r = VppVxlanTunnel(cls, src=cls.pg0.local_ip4, src_port=port, dst_port=port, dst=cls.mcast_ip4, mcast_sw_if_index=1, vni=vni) if is_add: r.add_vpp_config() if r.sw_if_index == 0xffffffff: raise ValueError("bad sw_if_index: ~0") else: r.remove_vpp_config() @classmethod def add_shared_mcast_dst_load(cls, port): cls.add_del_shared_mcast_dst_load(port=port, is_add=1) @classmethod def del_shared_mcast_dst_load(cls, port): cls.add_del_shared_mcast_dst_load(port=port, is_add=0) @classmethod def add_del_mcast_tunnels_load(cls, port, is_add): """ add or del tunnels to test vxlan stability """ n_distinct_dst_tunnels = 200 ip_range_start = 10 ip_range_end = ip_range_start + n_distinct_dst_tunnels for dest_ip4 in ip4_range(cls.mcast_ip4, ip_range_start, ip_range_end): vni = bytearray(socket.inet_pton(socket.AF_INET, dest_ip4))[3] r = VppVxlanTunnel(cls, src=cls.pg0.local_ip4, src_port=port, dst_port=port, dst=dest_ip4, mcast_sw_if_index=1, vni=vni) if is_add: r.add_vpp_config() else: r.remove_vpp_config() @classmethod def add_mcast_tunnels_load(cls, port): cls.add_del_mcast_tunnels_load(port=port, is_add=1) @classmethod def del_mcast_tunnels_load(cls, port): cls.add_del_mcast_tunnels_load(port=port, 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(TestVxlan, cls).setUpClass() try: cls.flags = 0x8 # Create 2 pg interfaces. cls.create_pg_interfaces(range(4)) for pg in cls.pg_interfaces: pg.admin_up() 
/*
 * Copyright (c) 2018 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef included_valloc_h
#define included_valloc