test/test_geneve.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.geneve import GENEVE
  12 from scapy.utils import atol
  13
  14
  15 class TestGeneve(BridgeDomain, VppTestCase):
  16     """ GENEVE 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         """
  25         Encapsulate the original payload frame by adding GENEVE header with its
  26         UDP, IP and Ethernet fields
  27         """
  28         return (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
  29                 IP(src=self.pg0.remote_ip4, dst=self.pg0.local_ip4) /
  30                 UDP(sport=self.dport, dport=self.dport, chksum=0) /
  31                 GENEVE(vni=vni) /
  32                 pkt)
  33
  34     def ip_range(self, start, end):
  35         """ range of remote ip's """
  36         return ip4_range(self.pg0.remote_ip4, start, end)
  37
  38     def encap_mcast(self, pkt, src_ip, src_mac, vni):
  39         """
  40         Encapsulate the original payload frame by adding GENEVE header with its
  41         UDP, IP and Ethernet fields
  42         """
  43         return (Ether(src=src_mac, dst=self.mcast_mac) /
  44                 IP(src=src_ip, dst=self.mcast_ip4) /
  45                 UDP(sport=self.dport, dport=self.dport, chksum=0) /
  46                 GENEVE(vni=vni) /
  47                 pkt)
  48
  49     def decapsulate(self, pkt):
  50         """
  51         Decapsulate the original payload frame by removing GENEVE header
  52         """
  53         # check if is set I flag
  54         # self.assertEqual(pkt[GENEVE].flags, int('0x8', 16))
  55         return pkt[GENEVE].payload
  56
  57     # Method for checking GENEVE encapsulation.
  58     #
  59     def check_encapsulation(self, pkt, vni, local_only=False, mcast_pkt=False):
  60         # TODO: add error messages
  61         # Verify source MAC is VPP_MAC and destination MAC is MY_MAC resolved
  62         #  by VPP using ARP.
  63         self.assertEqual(pkt[Ether].src, self.pg0.local_mac)
  64         if not local_only:
  65             if not mcast_pkt:
  66                 self.assertEqual(pkt[Ether].dst, self.pg0.remote_mac)
  67             else:
  68                 self.assertEqual(pkt[Ether].dst, type(self).mcast_mac)
  69         # Verify GENEVE tunnel source IP is VPP_IP and destination IP is MY_IP.
  70         self.assertEqual(pkt[IP].src, self.pg0.local_ip4)
  71         if not local_only:
  72             if not mcast_pkt:
  73                 self.assertEqual(pkt[IP].dst, self.pg0.remote_ip4)
  74             else:
  75                 self.assertEqual(pkt[IP].dst, type(self).mcast_ip4)
  76         # Verify UDP destination port is GENEVE 4789, source UDP port could be
  77         #  arbitrary.
  78         self.assertEqual(pkt[UDP].dport, type(self).dport)
  79         # TODO: checksum check
  80         # Verify VNI
  81         self.assertEqual(pkt[GENEVE].vni, vni)
  82
  83     @classmethod
  84     def create_geneve_flood_test_bd(cls, vni, n_ucast_tunnels):
  85         # Create 10 ucast geneve tunnels under bd
  86         ip_range_start = 10
  87         ip_range_end = ip_range_start + n_ucast_tunnels
  88         next_hop_address = cls.pg0.remote_ip4n
  89         for dest_ip4n in ip4n_range(next_hop_address, ip_range_start,
  90                                     ip_range_end):
  91             # add host route so dest_ip4n will not be resolved
  92             cls.vapi.ip_add_del_route(dst_address=dest_ip4n,
  93                                       dst_address_length=32,
  94                                       next_hop_address=next_hop_address)
  95             r = cls.vapi.geneve_add_del_tunnel(
  96                 local_address=cls.pg0.local_ip4n, remote_address=dest_ip4n,
  97                 vni=vni)
  98             cls.vapi.sw_interface_set_l2_bridge(rx_sw_if_index=r.sw_if_index,
  99                                                 bd_id=vni)
 100
 101     @classmethod
 102     def add_del_shared_mcast_dst_load(cls, is_add):
 103         """
 104         add or del tunnels sharing the same mcast dst
 105         to test geneve ref_count mechanism
 106         """
 107         n_shared_dst_tunnels = 10
 108         vni_start = 10000
 109         vni_end = vni_start + n_shared_dst_tunnels
 110         for vni in range(vni_start, vni_end):
 111             r = cls.vapi.geneve_add_del_tunnel(
 112                 local_address=cls.pg0.local_ip4n,
 113                 remote_address=cls.mcast_ip4n, mcast_sw_if_index=1,
 114                 is_add=is_add, vni=vni)
 115             if r.sw_if_index == 0xffffffff:
 116                 raise "bad sw_if_index"
 117
 118     @classmethod
 119     def add_shared_mcast_dst_load(cls):
 120         cls.add_del_shared_mcast_dst_load(is_add=1)
 121
 122     @classmethod
 123     def del_shared_mcast_dst_load(cls):
 124         cls.add_del_shared_mcast_dst_load(is_add=0)
 125
 126     @classmethod
 127     def add_del_mcast_tunnels_load(cls, is_add):
 128         """
 129         add or del tunnels to test geneve stability
 130         """
 131         n_distinct_dst_tunnels = 10
 132         ip_range_start = 10
 133         ip_range_end = ip_range_start + n_distinct_dst_tunnels
 134         for dest_ip4n in ip4n_range(cls.mcast_ip4n, ip_range_start,
 135                                     ip_range_end):
 136             vni = bytearray(dest_ip4n)[3]
 137             cls.vapi.geneve_add_del_tunnel(local_address=cls.pg0.local_ip4n,
 138                                            remote_address=dest_ip4n,
 139                                            mcast_sw_if_index=1, is_add=is_add,
 140                                            vni=vni)
 141
 142     @classmethod
 143     def add_mcast_tunnels_load(cls):
 144         cls.add_del_mcast_tunnels_load(is_add=1)
 145
 146     @classmethod
 147     def del_mcast_tunnels_load(cls):
 148         cls.add_del_mcast_tunnels_load(is_add=0)
 149
 150     # Class method to start the GENEVE test case.
 151     #  Overrides setUpClass method in VppTestCase class.
 152     #  Python try..except statement is used to ensure that the tear down of
 153     #  the class will be executed even if exception is raised.
 154     #  @param cls The class pointer.
 155     @classmethod
 156     def setUpClass(cls):
 157         super(TestGeneve, cls).setUpClass()
 158
 159         try:
 160             cls.dport = 6081
 161
 162             # Create 2 pg interfaces.
 163             cls.create_pg_interfaces(range(4))
 164             for pg in cls.pg_interfaces:
 165                 pg.admin_up()
 166
 167             # Configure IPv4 addresses on VPP pg0.
 168             cls.pg0.config_ip4()
 169
 170             # Resolve MAC address for VPP's IP address on pg0.
 171             cls.pg0.resolve_arp()
 172
 173             # Our Multicast address
 174             cls.mcast_ip4 = '239.1.1.1'
 175             cls.mcast_ip4n = socket.inet_pton(socket.AF_INET, cls.mcast_ip4)
 176             iplong = atol(cls.mcast_ip4)
 177             cls.mcast_mac = "01:00:5e:%02x:%02x:%02x" % (
 178                 (iplong >> 16) & 0x7F, (iplong >> 8) & 0xFF, iplong & 0xFF)
 179
 180             # Create GENEVE VTEP on VPP pg0, and put geneve_tunnel0 and pg1
 181             #  into BD.
 182             cls.single_tunnel_bd = 1
 183             r = cls.vapi.geneve_add_del_tunnel(
 184                 local_address=cls.pg0.local_ip4n,
 185                 remote_address=cls.pg0.remote_ip4n, vni=cls.single_tunnel_bd)
 186             cls.vapi.sw_interface_set_l2_bridge(rx_sw_if_index=r.sw_if_index,
 187                                                 bd_id=cls.single_tunnel_bd)
 188             cls.vapi.sw_interface_set_l2_bridge(
 189                 rx_sw_if_index=cls.pg1.sw_if_index, bd_id=cls.single_tunnel_bd)
 190
 191             # Setup vni 2 to test multicast flooding
 192             cls.n_ucast_tunnels = 10
 193             cls.mcast_flood_bd = 2
 194             cls.create_geneve_flood_test_bd(cls.mcast_flood_bd,
 195                                             cls.n_ucast_tunnels)
 196             r = cls.vapi.geneve_add_del_tunnel(
 197                 local_address=cls.pg0.local_ip4n,
 198                 remote_address=cls.mcast_ip4n, mcast_sw_if_index=1,
 199                 vni=cls.mcast_flood_bd)
 200             cls.vapi.sw_interface_set_l2_bridge(rx_sw_if_index=r.sw_if_index,
 201                                                 bd_id=cls.mcast_flood_bd)
 202             cls.vapi.sw_interface_set_l2_bridge(
 203                 rx_sw_if_index=cls.pg2.sw_if_index, bd_id=cls.mcast_flood_bd)
 204
 205             # Add and delete mcast tunnels to check stability
 206             cls.add_shared_mcast_dst_load()
 207             cls.add_mcast_tunnels_load()
 208             cls.del_shared_mcast_dst_load()
 209             cls.del_mcast_tunnels_load()
 210
 211             # Setup vni 3 to test unicast flooding
 212             cls.ucast_flood_bd = 3
 213             cls.create_geneve_flood_test_bd(cls.ucast_flood_bd,
 214                                             cls.n_ucast_tunnels)
 215             cls.vapi.sw_interface_set_l2_bridge(
 216                 rx_sw_if_index=cls.pg3.sw_if_index, bd_id=cls.ucast_flood_bd)
 217         except Exception:
 218             super(TestGeneve, cls).tearDownClass()
 219             raise
 220
 221     # Method to define VPP actions before tear down of the test case.
 222     #  Overrides tearDown method in VppTestCase class.
 223     #  @param self The object pointer.
 224     def tearDown(self):
 225         super(TestGeneve, self).tearDown()
 226         if not self.vpp_dead:
 227             self.logger.info(self.vapi.cli("show bridge-domain 1 detail"))
 228             self.logger.info(self.vapi.cli("show bridge-domain 2 detail"))
 229             self.logger.info(self.vapi.cli("show bridge-domain 3 detail"))
 230             self.logger.info(self.vapi.cli("show geneve tunnel"))
 231
 232
 233 if __name__ == '__main__':
 234     unittest.main(testRunner=VppTestRunner)