test/test_ip4.py

   1 #!/usr/bin/env python
   2
   3 import unittest
   4 import socket
   5 from logging import *
   6
   7 from framework import VppTestCase, VppTestRunner
   8 from vpp_sub_interface import VppSubInterface, VppDot1QSubint, VppDot1ADSubint
   9
  10 from scapy.packet import Raw
  11 from scapy.layers.l2 import Ether, Dot1Q, ARP
  12 from scapy.layers.inet import IP, UDP
  13
  14
  15 class TestIPv4(VppTestCase):
  16     """ IPv4 Test Case """
  17
  18     @classmethod
  19     def setUpClass(cls):
  20         super(TestIPv4, cls).setUpClass()
  21
  22     def setUp(self):
  23         super(TestIPv4, self).setUp()
  24
  25         # create 3 pg interfaces
  26         self.create_pg_interfaces(range(3))
  27
  28         # create 2 subinterfaces for pg1 and pg2
  29         self.sub_interfaces = [
  30             VppDot1QSubint(self, self.pg1, 100),
  31             VppDot1ADSubint(self, self.pg2, 200, 300, 400)]
  32
  33         # packet flows mapping pg0 -> pg1.sub, pg2.sub, etc.
  34         self.flows = dict()
  35         self.flows[self.pg0] = [self.pg1.sub_if, self.pg2.sub_if]
  36         self.flows[self.pg1.sub_if] = [self.pg0, self.pg2.sub_if]
  37         self.flows[self.pg2.sub_if] = [self.pg0, self.pg1.sub_if]
  38
  39         # packet sizes
  40         self.pg_if_packet_sizes = [64, 512, 1518, 9018]
  41         self.sub_if_packet_sizes = [64, 512, 1518 + 4, 9018 + 4]
  42
  43         self.interfaces = list(self.pg_interfaces)
  44         self.interfaces.extend(self.sub_interfaces)
  45
  46         # setup all interfaces
  47         for i in self.interfaces:
  48             i.admin_up()
  49             i.config_ip4()
  50             i.resolve_arp()
  51
  52         # config 2M FIB enries
  53         self.config_fib_entries(200)
  54
  55     def tearDown(self):
  56         super(TestIPv4, self).tearDown()
  57         if not self.vpp_dead:
  58             info(self.vapi.cli("show ip arp"))
  59             # info(self.vapi.cli("show ip fib"))  # many entries
  60
  61     def config_fib_entries(self, count):
  62         n_int = len(self.interfaces)
  63         percent = 0
  64         counter = 0.0
  65         dest_addr = socket.inet_pton(socket.AF_INET, "10.0.0.1")
  66         dest_addr_len = 32
  67         for i in self.interfaces:
  68             next_hop_address = i.local_ip4n
  69             for j in range(count / n_int):
  70                 self.vapi.ip_add_del_route(
  71                     dest_addr, dest_addr_len, next_hop_address)
  72                 counter = counter + 1
  73                 if counter / count * 100 > percent:
  74                     info("Configure %d FIB entries .. %d%% done" %
  75                          (count, percent))
  76                     percent = percent + 1
  77
  78     def create_stream(self, src_if, packet_sizes):
  79         pkts = []
  80         for i in range(0, 257):
  81             dst_if = self.flows[src_if][i % 2]
  82             info = self.create_packet_info(
  83                 src_if.sw_if_index, dst_if.sw_if_index)
  84             payload = self.info_to_payload(info)
  85             p = (Ether(dst=src_if.local_mac, src=src_if.remote_mac) /
  86                  IP(src=src_if.remote_ip4, dst=dst_if.remote_ip4) /
  87                  UDP(sport=1234, dport=1234) /
  88                  Raw(payload))
  89             info.data = p.copy()
  90             if isinstance(src_if, VppSubInterface):
  91                 p = src_if.add_dot1_layer(p)
  92             size = packet_sizes[(i // 2) % len(packet_sizes)]
  93             self.extend_packet(p, size)
  94             pkts.append(p)
  95         return pkts
  96
  97     def verify_capture(self, dst_if, capture):
  98         info("Verifying capture on interface %s" % dst_if.name)
  99         last_info = dict()
 100         for i in self.interfaces:
 101             last_info[i.sw_if_index] = None
 102         is_sub_if = False
 103         dst_sw_if_index = dst_if.sw_if_index
 104         if hasattr(dst_if, 'parent'):
 105             is_sub_if = True
 106         for packet in capture:
 107             if is_sub_if:
 108                 # Check VLAN tags and Ethernet header
 109                 packet = dst_if.remove_dot1_layer(packet)
 110             self.assertTrue(Dot1Q not in packet)
 111             try:
 112                 ip = packet[IP]
 113                 udp = packet[UDP]
 114                 payload_info = self.payload_to_info(str(packet[Raw]))
 115                 packet_index = payload_info.index
 116                 self.assertEqual(payload_info.dst, dst_sw_if_index)
 117                 debug("Got packet on port %s: src=%u (id=%u)" %
 118                       (dst_if.name, payload_info.src, packet_index))
 119                 next_info = self.get_next_packet_info_for_interface2(
 120                     payload_info.src, dst_sw_if_index,
 121                     last_info[payload_info.src])
 122                 last_info[payload_info.src] = next_info
 123                 self.assertTrue(next_info is not None)
 124                 self.assertEqual(packet_index, next_info.index)
 125                 saved_packet = next_info.data
 126                 # Check standard fields
 127                 self.assertEqual(ip.src, saved_packet[IP].src)
 128                 self.assertEqual(ip.dst, saved_packet[IP].dst)
 129                 self.assertEqual(udp.sport, saved_packet[UDP].sport)
 130                 self.assertEqual(udp.dport, saved_packet[UDP].dport)
 131             except:
 132                 error("Unexpected or invalid packet:")
 133                 error(packet.show())
 134                 raise
 135         for i in self.interfaces:
 136             remaining_packet = self.get_next_packet_info_for_interface2(
 137                 i.sw_if_index, dst_sw_if_index, last_info[i.sw_if_index])
 138             self.assertTrue(
 139                 remaining_packet is None,
 140                 "Interface %s: Packet expected from interface %s didn't arrive" %
 141                 (dst_if.name, i.name))
 142
 143     def test_fib(self):
 144         """ IPv4 FIB test """
 145
 146         pkts = self.create_stream(self.pg0, self.pg_if_packet_sizes)
 147         self.pg0.add_stream(pkts)
 148
 149         for i in self.sub_interfaces:
 150             pkts = self.create_stream(i, self.sub_if_packet_sizes)
 151             i.parent.add_stream(pkts)
 152
 153         self.pg_enable_capture(self.pg_interfaces)
 154         self.pg_start()
 155
 156         pkts = self.pg0.get_capture()
 157         self.verify_capture(self.pg0, pkts)
 158
 159         for i in self.sub_interfaces:
 160             pkts = i.parent.get_capture()
 161             self.verify_capture(i, pkts)
 162
 163
 164 if __name__ == '__main__':
 165     unittest.main(testRunner=VppTestRunner)