#!/usr/bin/env python import socket from util import ip4n_range, ip4_range import unittest from framework import VppTestCase, VppTestRunner, running_extended_tests from template_bd import BridgeDomain from scapy.layers.l2 import Ether, Raw from scapy.layers.inet import IP, UDP from scapy.layers.vxlan import VXLAN from scapy.utils import atol @unittest.skipUnless(running_extended_tests(), "part of extended tests") class TestVxlanGpe(BridgeDomain, VppTestCase): """ VXLAN-GPE 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-GPE 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-GPE 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-GPE header """ # check if is set I and P flag self.assertEqual(pkt[VXLAN].flags, 0x0c) return pkt[VXLAN].payload # Method for checking VXLAN-GPE encapsulation. # def check_encapsulation(self, pkt, vni, local_only=False, mcast_pkt=False): # 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-GPE tunnel src IP is VPP_IP and dst 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-GPE 4790, source UDP port # could be arbitrary. self.assertEqual(pkt[UDP].dport, type(self).dport) # Verify VNI self.assertEqual(pkt[VXLAN].vni, vni) @classmethod def create_vxlan_gpe_flood_test_bd(cls, vni, n_ucast_tunnels): # Create 10 ucast vxlan_gpe tunnels under bd ip_range_start = 10 ip_range_end = ip_range_start + n_ucast_tunnels next_hop_address = cls.pg0.remote_ip4n for dest_ip4n in ip4n_range(next_hop_address, ip_range_start, ip_range_end): # add host route so dest_ip4n will not be resolved cls.vapi.ip_add_del_route(dest_ip4n, 32, next_hop_address) r = cls.vapi.vxlan_gpe_add_del_tunnel( src_addr=cls.pg0.local_ip4n, dst_addr=dest_ip4n, vni=vni) cls.vapi.sw_interface_set_l2_bridge(r.sw_if_index, bd_id=vni) @classmethod def add_del_shared_mcast_dst_load(cls, is_add): """ add or del tunnels sharing the same mcast dst to test vxlan_gpe ref_count mechanism """ n_shared_dst_tunnels = 20 vni_start = 1000 vni_end = vni_start + n_shared_dst_tunnels for vni in range(vni_start, vni_end): r = cls.vapi.vxlan_gpe_add_del_tunnel( src_addr=cls.pg0.local_ip4n, dst_addr=cls.mcast_ip4n, mcast_sw_if_index=1, vni=vni, is_add=is_add) if r.sw_if_index == 0xffffffff: raise "bad sw_if_index" @classmethod def add_shared_mcast_dst_load(cls): cls.add_del_shared_mcast_dst_load(is_add=1) @classmethod def del_shared_mcast_dst_load(cls): cls.add_del_shared_mcast_dst_load(is_add=0) @classmethod def add_del_mcast_tunnels_load(cls, is_add): """ add or del tunnels to test vxlan_gpe stability """ n_distinct_dst_tunnels = 20 ip_range_start = 10 ip_range_end = ip_range_start + n_distinct_dst_tunnels for dest_ip4n in ip4n_range(cls.mcast_ip4n, ip_range_start, ip_range_end): vni = bytearray(dest_ip4n)[3] cls.vapi.vxlan_gpe_add_del_tunnel( src_addr=cls.pg0.local_ip4n, dst_addr=dest_ip4n, mcast_sw_if_index=1, vni=vni, is_add=is_add) @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-GPE 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(TestVxlanGpe, cls).setUpClass() try: cls.dport = 4790 cls