test/test_vxlan.py

   1 #!/usr/bin/env python
   2
   3 import socket
   4 from util import ip4n_range, ip4_range
   5 import unittest
   6 from framework import VppTestCase, VppTestRunner
   7 from template_bd import BridgeDomain
   8
   9 from scapy.layers.l2 import Ether
  10 from scapy.layers.inet import IP, UDP
  11 from scapy.layers.vxlan import VXLAN
  12 from scapy.utils import atol
  13
  14
  15 class TestVxlan(BridgeDomain, VppTestCase):
  16     """ VXLAN Test Case """
  17
  18     def __init__(self, *args):
  19         BridgeDomain.__init__(self)
  20         VppTestCase.__init__(self, *args)
  21
  22     def encapsulate(self, pkt, vni):
  23         """
  24         Encapsulate the original payload frame by adding VXLAN header with its
  25         UDP, IP and Ethernet fields
  26         """
  27         return (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
  28                 IP(src=self.pg0.remote_ip4, dst=self.pg0.local_ip4) /
  29                 UDP(sport=self.dport, dport=self.dport, chksum=0) /
  30                 VXLAN(vni=vni, flags=self.flags) /
  31                 pkt)
  32
  33     def ip_range(self, start, end):
  34         """ range of remote ip's """
  35         return ip4_range(self.pg0.remote_ip4, start, end)
  36
  37     def encap_mcast(self, pkt, src_ip, src_mac, vni):
  38         """
  39         Encapsulate the original payload frame by adding VXLAN header with its
  40         UDP, IP and Ethernet fields
  41         """
  42         return (Ether(src=src_mac, dst=self.mcast_mac) /
  43                 IP(src=src_ip, dst=self.mcast_ip4) /
  44                 UDP(sport=self.dport, dport=self.dport, chksum=0) /
  45                 VXLAN(vni=vni, flags=self.flags) /
  46                 pkt)
  47
  48     def decapsulate(self, pkt):
  49         """
  50         Decapsulate the original payload frame by removing VXLAN header
  51         """
  52         # check if is set I flag
  53         self.assertEqual(pkt[VXLAN].flags, int('0x8', 16))
  54         return pkt[VXLAN].payload
  55
  56     # Method for checking VXLAN encapsulation.
  57     #
  58     def check_encapsulation(self, pkt, vni, local_only=False, mcast_pkt=False):
  59         # TODO: add error messages
  60         # Verify source MAC is VPP_MAC and destination MAC is MY_MAC resolved
  61         #  by VPP using ARP.
  62         self.assertEqual(pkt[Ether].src, self.pg0.local_mac)
  63         if not local_only:
  64             if not mcast_pkt:
  65                 self.assertEqual(pkt[Ether].dst, self.pg0.remote_mac)
  66             else:
  67                 self.assertEqual(pkt[Ether].dst, type(self).mcast_mac)
  68         # Verify VXLAN tunnel source IP is VPP_IP and destination IP is MY_IP.
  69         self.assertEqual(pkt[IP].src, self.pg0.local_ip4)
  70         if not local_only:
  71             if not mcast_pkt:
  72                 self.assertEqual(pkt[IP].dst, self.pg0.remote_ip4)
  73             else:
  74                 self.assertEqual(pkt[IP].dst, type(self).mcast_ip4)
  75         # Verify UDP destination port is VXLAN 4789, source UDP port could be
  76         #  arbitrary.
  77         self.assertEqual(pkt[UDP].dport, type(self).dport)
  78         # TODO: checksum check
  79         # Verify VNI
  80         self.assertEqual(pkt[VXLAN].vni, vni)
  81
  82     @classmethod
  83     def create_vxlan_flood_test_bd(cls, vni, n_ucast_tunnels):
  84         # Create 10 ucast vxlan tunnels under bd
  85         ip_range_start = 10
  86         ip_range_end = ip_range_start + n_ucast_tunnels
  87         next_hop_address = cls.pg0.remote_ip4n
  88         for dest_ip4n in ip4n_range(next_hop_address, ip_range_start,
  89                                     ip_range_end):
  90             # add host route so dest_ip4n will not be resolved
  91             cls.vapi.ip_add_del_route(dest_ip4n, 32, next_hop_address)
  92             r = cls.vapi.vxlan_add_del_tunnel(
  93                 src_addr=cls.pg0.local_ip4n,
  94                 dst_addr=dest_ip4n,
  95                 vni=vni)
  96             cls.vapi.sw_interface_set_l2_bridge(r.sw_if_index, bd_id=vni)
  97
  98     @classmethod
  99     def add_del_shared_mcast_dst_load(cls, is_add):
 100         """
 101         add or del tunnels sharing the same mcast dst
 102         to test vxlan ref_count mechanism
 103         """
 104         n_shared_dst_tunnels = 20
 105         vni_start = 10000
 106         vni_end = vni_start + n_shared_dst_tunnels
 107         for vni in range(vni_start, vni_end):
 108             r = cls.vapi.vxlan_add_del_tunnel(
 109                 src_addr=cls.pg0.local_ip4n,
 110                 dst_addr=cls.mcast_ip4n,
 111                 mcast_sw_if_index=1,
 112                 vni=vni,
 113                 is_add=is_add)
 114             if r.sw_if_index == 0xffffffff:
 115                 raise "bad sw_if_index"
 116
 117     @classmethod
 118     def add_shared_mcast_dst_load(cls):
 119         cls.add_del_shared_mcast_dst_load(is_add=1)
 120
 121     @classmethod
 122     def del_shared_mcast_dst_load(cls):
 123         cls.add_del_shared_mcast_dst_load(is_add=0)
 124
 125     @classmethod
 126     def add_del_mcast_tunnels_load(cls, is_add):
 127         """
 128         add or del tunnels to test vxlan stability
 129         """
 130         n_distinct_dst_tunnels = 200
 131         ip_range_start = 10
 132         ip_range_end = ip_range_start + n_distinct_dst_tunnels
 133         for dest_ip4n in ip4n_range(cls.mcast_ip4n, ip_range_start,
 134                                     ip_range_end):
 135             vni = bytearray(dest_ip4n)[3]
 136             cls.vapi.vxlan_add_del_tunnel(
 137                 src_addr=cls.pg0.local_ip4n,
 138                 dst_addr=dest_ip4n,
 139                 mcast_sw_if_index=1,
 140                 vni=vni,
 141                 is_add=is_add)
 142
 143     @classmethod
 144     def add_mcast_tunnels_load(cls):
 145         cls.add_del_mcast_tunnels_load(is_add=1)
 146
 147     @classmethod
 148     def del_mcast_tunnels_load(cls):
 149         cls.add_del_mcast_tunnels_load(is_add=0)
 150
 151     # Class method to start the VXLAN test case.
 152     #  Overrides setUpClass method in VppTestCase class.
 153     #  Python try..except statement is used to ensure that the tear down of
 154     #  the class will be executed even if exception is raised.
 155     #  @param cls The class pointer.
 156     @classmethod
 157     def setUpClass(cls):
 158         super(TestVxlan, cls).setUpClass()
 159
 160         try:
 161             cls.dport = 4789
 162             cls.flags = 0x8
 163
 164             # Create 2 pg interfaces.
 165             cls.create_pg_interfaces(range(4))
 166             for pg in cls.pg_interfaces:
 167                 pg.admin_up()
 168
 169             # Configure IPv4 addresses on VPP pg0.
 170             cls.pg0.config_ip4()
 171
 172             # Resolve MAC address for VPP's IP address on pg0.
 173             cls.pg0.resolve_arp()
 174
 175             # Our Multicast address
 176             cls.mcast_ip4 = '239.1.1.1'
 177             cls.mcast_ip4n = socket.inet_pton(socket.AF_INET, cls.mcast_ip4)
 178             iplong = atol(cls.mcast_ip4)
 179             cls.mcast_mac = "01:00:5e:%02x:%02x:%02x" % (
 180                 (iplong >> 16) & 0x7F, (iplong >> 8) & 0xFF, iplong & 0xFF)
 181
 182             # Create VXLAN VTEP on VPP pg0, and put vxlan_tunnel0 and pg1
 183             #  into BD.
 184             cls.single_tunnel_bd = 1
 185             r = cls.vapi.vxlan_add_del_tunnel(
 186                 src_addr=cls.pg0.local_ip4n,
 187                 dst_addr=cls.pg0.remote_ip4n,
 188                 vni=cls.single_tunnel_bd)
 189             cls.vapi.sw_interface_set_l2_bridge(r.sw_if_index,
 190                                                 bd_id=cls.single_tunnel_bd)
 191             cls.vapi.sw_interface_set_l2_bridge(cls.pg1.sw_if_index,
 192                                                 bd_id=cls.single_tunnel_bd)
 193
 194             # Setup vni 2 to test multicast flooding
 195             cls.n_ucast_tunnels = 10
 196             cls.mcast_flood_bd = 2
 197             cls.create_vxlan_flood_test_bd(cls.mcast_flood_bd,
 198                                            cls.n_ucast_tunnels)
 199             r = cls.vapi.vxlan_add_del_tunnel(
 200                 src_addr=cls.pg0.local_ip4n,
 201                 dst_addr=cls.mcast_ip4n,
 202                 mcast_sw_if_index=1,
 203                 vni=cls.mcast_flood_bd)
 204             cls.vapi.sw_interface_set_l2_bridge(r.sw_if_index,
 205                                                 bd_id=cls.mcast_flood_bd)
 206             cls.vapi.sw_interface_set_l2_bridge(cls.pg2.sw_if_index,
 207                                                 bd_id=cls.mcast_flood_bd)
 208
 209             # Add and delete mcast tunnels to check stability
 210             cls.add_shared_mcast_dst_load()
 211             cls.add_mcast_tunnels_load()
 212             cls.del_shared_mcast_dst_load()
 213             cls.del_mcast_tunnels_load()
 214
 215             # Setup vni 3 to test unicast flooding
 216             cls.ucast_flood_bd = 3
 217             cls.create_vxlan_flood_test_bd(cls.ucast_flood_bd,
 218                                            cls.n_ucast_tunnels)
 219             cls.vapi.sw_interface_set_l2_bridge(cls.pg3.sw_if_index,
 220                                                 bd_id=cls.ucast_flood_bd)
 221         except Exception:
 222             super(TestVxlan, cls).tearDownClass()
 223             raise
 224
 225     # Method to define VPP actions before tear down of the test case.
 226     #  Overrides tearDown method in VppTestCase class.
 227     #  @param self The object pointer.
 228     def tearDown(self):
 229         super(TestVxlan, self).tearDown()
 230         if not self.vpp_dead:
 231             self.logger.info(self.vapi.cli("show bridge-domain 1 detail"))
 232             self.logger.info(self.vapi.cli("show bridge-domain 2 detail"))
 233             self.logger.info(self.vapi.cli("show bridge-domain 3 detail"))
 234             self.logger.info(self.vapi.cli("show vxlan tunnel"))
 235
 236
 237 if __name__ == '__main__':
 238     unittest.main(testRunner=VppTestRunner)