#!/usr/bin/env python import unittest import random from scapy.packet import Raw from scapy.layers.l2 import Ether from scapy.layers.inet import IP, UDP from logging import * from framework import VppTestCase, VppTestRunner from util import TestHost class TestL2xc(VppTestCase): """ L2XC Test Case """ # Test variables hosts_nr = 10 # Number of hosts pkts_per_burst = 257 # Number of packets per burst @classmethod def setUpClass(cls): super(TestL2xc, cls).setUpClass() def setUp(self): super(TestL2xc, self).setUp() # create 4 pg interfaces self.create_pg_interfaces(range(4)) # packet flows mapping pg0 -> pg1, pg2 -> pg3, etc. self.flows = dict() self.flows[self.pg0] = [self.pg1] self.flows[self.pg1] = [self.pg0] self.flows[self.pg2] = [self.pg3] self.flows[self.pg3] = [self.pg2] # packet sizes self.pg_if_packet_sizes = [64, 512, 1518, 9018] self.interfaces = list(self.pg_interfaces) # Create bi-directional cross-connects between pg0 and pg1 self.vapi.sw_interface_set_l2_xconnect( self.pg0.sw_if_index, self.pg1.sw_if_index, enable=1) self.vapi.sw_interface_set_l2_xconnect( self.pg1.sw_if_index, self.pg0.sw_if_index, enable=1) # Create bi-directional cross-connects between pg2 and pg3 self.vapi.sw_interface_set_l2_xconnect( self.pg2.sw_if_index, self.pg3.sw_if_index, enable=1) self.vapi.sw_interface_set_l2_xconnect( self.pg3.sw_if_index, self.pg2.sw_if_index, enable=1) info(self.vapi.cli("show l2patch")) # mapping between packet-generator index and lists of test hosts self.hosts_by_pg_idx = dict() # Create host MAC and IPv4 lists # self.MY_MACS = dict() # self.MY_IP4S = dict() self.create_host_lists(TestL2xc.hosts_nr) # setup all interfaces for i in self.interfaces: i.admin_up() def tearDown(self): super(TestL2xc, self).tearDown() if not self.vpp_dead: info(self.vapi.cli("show l2patch")) def create_host_lists(self, count): """ Method to create required number of MAC and IPv4 addresses. Create required number of host MAC addresses and distribute them among interfaces. Create host IPv4 address for every host MAC address too. :param count: Number of hosts to create MAC and IPv4 addresses for. """ for pg_if in self.pg_interfaces: # self.MY_MACS[i.sw_if_index] = [] # self.MY_IP4S[i.sw_if_index] = [] self.hosts_by_pg_idx[pg_if.sw_if_index] = [] hosts = self.hosts_by_pg_idx[pg_if.sw_if_index] for j in range(0, count): host = TestHost( "00:00:00:ff:%02x:%02x" % (pg_if.sw_if_index, j), "172.17.1%02x.%u" % (pg_if.sw_if_index, j)) hosts.append(host) def create_stream(self, src_if, packet_sizes): pkts = [] for i in range(0, TestL2xc.pkts_per_burst): dst_if = self.flows[src_if][0] dst_host = random.choice(self.hosts_by_pg_idx[dst_if.sw_if_index]) src_host = random.choice(self.hosts_by_pg_idx[src_if.sw_if_index]) pkt_info = self.create_packet_info( src_if.sw_if_index, dst_if.sw_if_index) payload = self.info_to_payload(pkt_info) p = (Ether(dst=dst_host.mac, src=src_host.mac) / IP(src=src_host.ip4, dst=dst_host.ip4) / UDP(sport=1234, dport=1234) / Raw(payload)) pkt_info.data = p.copy() size = packet_sizes[(i / 2) % len(packet_sizes)] self.extend_packet(p, size) pkts.append(p) return pkts def verify_capture(self, pg_if, capture): last_info = dict() for i in self.interfaces: last_info[i.sw_if_index] = None dst_sw_if_index = pg_if.sw_if_index for packet in capture: try: ip = packet[IP] udp = packet[UDP] payload_info = self.payload_to_info(str(packet[Raw])) packet_index = payload_info.index self.assertEqual(payload_info.dst, dst_sw_if_index) debug("Got packet on port %s: src=%u (id=%u)" % (pg_if.name, payload_info.src, packet_index)) next_info = self.get_next_packet_info_for_interface2( payload_info.src, dst_sw_if_index, last_info[payload_info.src]) last_info[payload_info.src] = next_info self.assertTrue(next_info is not None) self.assertEqual(packet_index, next_info.index) saved_packet = next_info.data # Check standard fields self.assertEqual(ip.src, saved_packet[IP].src) self.assertEqual(ip.dst, saved_packet[IP].dst) self.assertEqual(udp.sport, saved_packet[UDP].sport) self.assertEqual(udp.dport, saved_packet[UDP].dport) except: error("Unexpected or invalid packet:") packet.show() raise for i in self.interfaces: remaining_packet = self.get_next_packet_info_for_interface2( i, dst_sw_if_index, last_info[i.sw_if_index]) self.assertTrue(remaining_packet is None, "Port %u: Packet expected from source %u didn't" " arrive" % (dst_sw_if_index, i.sw_if_index)) def test_l2xc(self): """ L2XC test Test scenario: 1. config 2 pairs of 2 interfaces, l2xconnected 2. sending l2 eth packets between 4 interfaces 64B, 512B, 1518B, 9018B (ether_size) burst of packets per interface """ # Create incoming packet streams for packet-generator interfaces for i in self.interfaces: pkts = self.create_stream(i, self.pg_if_packet_sizes) i.add_stream(pkts) # Enable packet capturing and start packet sending self.pg_enable_capture(self.pg_interfaces) self.pg_start() # Verify outgoing packet streams per packet-generator interface for i in self.pg_interfaces: capture = i.get_capture() info("Verifying capture on interface %s" % i.name) self.verify_capture(i, capture) if __name__ == '__main__': unittest.main(testRunner=VppTestRunner)