test/test_ip6.py

   1 #!/usr/bin/env python
   2
   3 import unittest
   4 import socket
   5
   6 from framework import VppTestCase, VppTestRunner
   7 from vpp_sub_interface import VppSubInterface, VppDot1QSubint
   8
   9 from scapy.packet import Raw
  10 from scapy.layers.l2 import Ether, Dot1Q
  11 from scapy.layers.inet6 import IPv6, UDP
  12
  13
  14 class TestIPv6(VppTestCase):
  15     """ IPv6 Test Case """
  16
  17     @classmethod
  18     def setUpClass(cls):
  19         super(TestIPv6, cls).setUpClass()
  20
  21     def setUp(self):
  22         """
  23         Perform test setup before test case.
  24
  25         **Config:**
  26             - create 3 pg interfaces
  27                 - untagged pg0 interface
  28                 - Dot1Q subinterface on pg1
  29                 - Dot1AD subinterface on pg2
  30             - setup interfaces:
  31                 - put it into UP state
  32                 - set IPv6 addresses
  33                 - resolve neighbor address using NDP
  34             - configure 200 fib entries
  35
  36         :ivar list interfaces: pg interfaces and subinterfaces.
  37         :ivar dict flows: IPv4 packet flows in test.
  38         :ivar list pg_if_packet_sizes: packet sizes in test.
  39
  40         *TODO:* Create AD sub interface
  41         """
  42         super(TestIPv6, self).setUp()
  43
  44         # create 3 pg interfaces
  45         self.create_pg_interfaces(range(3))
  46
  47         # create 2 subinterfaces for p1 and pg2
  48         self.sub_interfaces = [
  49             VppDot1QSubint(self, self.pg1, 100),
  50             VppDot1QSubint(self, self.pg2, 200)
  51             # TODO: VppDot1ADSubint(self, self.pg2, 200, 300, 400)
  52         ]
  53
  54         # packet flows mapping pg0 -> pg1.sub, pg2.sub, etc.
  55         self.flows = dict()
  56         self.flows[self.pg0] = [self.pg1.sub_if, self.pg2.sub_if]
  57         self.flows[self.pg1.sub_if] = [self.pg0, self.pg2.sub_if]
  58         self.flows[self.pg2.sub_if] = [self.pg0, self.pg1.sub_if]
  59
  60         # packet sizes
  61         self.pg_if_packet_sizes = [64, 512, 1518, 9018]
  62         self.sub_if_packet_sizes = [64, 512, 1518 + 4, 9018 + 4]
  63
  64         self.interfaces = list(self.pg_interfaces)
  65         self.interfaces.extend(self.sub_interfaces)
  66
  67         # setup all interfaces
  68         for i in self.interfaces:
  69             i.admin_up()
  70             i.config_ip6()
  71             i.resolve_ndp()
  72
  73         # config 2M FIB entries
  74         self.config_fib_entries(200)
  75
  76     def tearDown(self):
  77         """Run standard test teardown and log ``show ip6 neighbors``."""
  78         super(TestIPv6, self).tearDown()
  79         if not self.vpp_dead:
  80             self.logger.info(self.vapi.cli("show ip6 neighbors"))
  81             # info(self.vapi.cli("show ip6 fib"))  # many entries
  82
  83     def config_fib_entries(self, count):
  84         """For each interface add to the FIB table *count* routes to
  85         "fd02::1/128" destination with interface's local address as next-hop
  86         address.
  87
  88         :param int count: Number of FIB entries.
  89
  90         - *TODO:* check if the next-hop address shouldn't be remote address
  91           instead of local address.
  92         """
  93         n_int = len(self.interfaces)
  94         percent = 0
  95         counter = 0.0
  96         dest_addr = socket.inet_pton(socket.AF_INET6, "fd02::1")
  97         dest_addr_len = 128
  98         for i in self.interfaces:
  99             next_hop_address = i.local_ip6n
 100             for j in range(count / n_int):
 101                 self.vapi.ip_add_del_route(
 102                     dest_addr, dest_addr_len, next_hop_address, is_ipv6=1)
 103                 counter += 1
 104                 if counter / count * 100 > percent:
 105                     self.logger.info("Configure %d FIB entries .. %d%% done" %
 106                          (count, percent))
 107                     percent += 1
 108
 109     def create_stream(self, src_if, packet_sizes):
 110         """Create input packet stream for defined interface.
 111
 112         :param VppInterface src_if: Interface to create packet stream for.
 113         :param list packet_sizes: Required packet sizes.
 114         """
 115         pkts = []
 116         for i in range(0, 257):
 117             dst_if = self.flows[src_if][i % 2]
 118             info = self.create_packet_info(
 119                 src_if.sw_if_index, dst_if.sw_if_index)
 120             payload = self.info_to_payload(info)
 121             p = (Ether(dst=src_if.local_mac, src=src_if.remote_mac) /
 122                  IPv6(src=src_if.remote_ip6, dst=dst_if.remote_ip6) /
 123                  UDP(sport=1234, dport=1234) /
 124                  Raw(payload))
 125             info.data = p.copy()
 126             if isinstance(src_if, VppSubInterface):
 127                 p = src_if.add_dot1_layer(p)
 128             size = packet_sizes[(i // 2) % len(packet_sizes)]
 129             self.extend_packet(p, size)
 130             pkts.append(p)
 131         return pkts
 132
 133     def verify_capture(self, dst_if, capture):
 134         """Verify captured input packet stream for defined interface.
 135
 136         :param VppInterface dst_if: Interface to verify captured packet stream
 137                                     for.
 138         :param list capture: Captured packet stream.
 139         """
 140         self.logger.info("Verifying capture on interface %s" % dst_if.name)
 141         last_info = dict()
 142         for i in self.interfaces:
 143             last_info[i.sw_if_index] = None
 144         is_sub_if = False
 145         dst_sw_if_index = dst_if.sw_if_index
 146         if hasattr(dst_if, 'parent'):
 147             is_sub_if = True
 148         for packet in capture:
 149             if is_sub_if:
 150                 # Check VLAN tags and Ethernet header
 151                 packet = dst_if.remove_dot1_layer(packet)
 152             self.assertTrue(Dot1Q not in packet)
 153             try:
 154                 ip = packet[IPv6]
 155                 udp = packet[UDP]
 156                 payload_info = self.payload_to_info(str(packet[Raw]))
 157                 packet_index = payload_info.index
 158                 self.assertEqual(payload_info.dst, dst_sw_if_index)
 159                 self.logger.debug("Got packet on port %s: src=%u (id=%u)" %
 160                                   (dst_if.name, payload_info.src, packet_index))
 161                 next_info = self.get_next_packet_info_for_interface2(
 162                     payload_info.src, dst_sw_if_index,
 163                     last_info[payload_info.src])
 164                 last_info[payload_info.src] = next_info
 165                 self.assertTrue(next_info is not None)
 166                 self.assertEqual(packet_index, next_info.index)
 167                 saved_packet = next_info.data
 168                 # Check standard fields
 169                 self.assertEqual(ip.src, saved_packet[IPv6].src)
 170                 self.assertEqual(ip.dst, saved_packet[IPv6].dst)
 171                 self.assertEqual(udp.sport, saved_packet[UDP].sport)
 172                 self.assertEqual(udp.dport, saved_packet[UDP].dport)
 173             except:
 174                 self.logger.error("Unexpected or invalid packet:")
 175                 self.logger.error(packet.show())
 176                 raise
 177         for i in self.interfaces:
 178             remaining_packet = self.get_next_packet_info_for_interface2(
 179                 i.sw_if_index, dst_sw_if_index, last_info[i.sw_if_index])
 180             self.assertTrue(
 181                 remaining_packet is None,
 182                 "Interface %s: Packet expected from interface %s didn't arrive" %
 183                 (dst_if.name, i.name))
 184
 185     def test_fib(self):
 186         """ IPv6 FIB test
 187
 188         Test scenario:
 189             - Create IPv6 stream for pg0 interface
 190             - Create IPv6 tagged streams for pg1's and pg2's subinterface.
 191             - Send and verify received packets on each interface.
 192         """
 193
 194         pkts = self.create_stream(self.pg0, self.pg_if_packet_sizes)
 195         self.pg0.add_stream(pkts)
 196
 197         for i in self.sub_interfaces:
 198             pkts = self.create_stream(i, self.sub_if_packet_sizes)
 199             i.parent.add_stream(pkts)
 200
 201         self.pg_enable_capture(self.pg_interfaces)
 202         self.pg_start()
 203
 204         pkts = self.pg0.get_capture()
 205         self.verify_capture(self.pg0, pkts)
 206
 207         for i in self.sub_interfaces:
 208             pkts = i.parent.get_capture()
 209             self.verify_capture(i, pkts)
 210
 211
 212 if __name__ == '__main__':
 213     unittest.main(testRunner=VppTestRunner)