#!/usr/bin/env python import unittest from logging import * import random from scapy.packet import Raw from scapy.layers.l2 import Ether, Dot1Q from scapy.layers.inet import IP, UDP from framework import VppTestCase, VppTestRunner from vpp_sub_interface import VppDot1QSubint from util import Host class TestL2bd(VppTestCase): """ L2BD Test Case """ # Test variables bd_id = 1 # Bridge domain ID mac_entries_count = 100 # Number of MAC entries for bridge-domain to learn dot1q_sub_id = 100 # SubID of dot1q sub-interface dot1q_tag = 100 # VLAN tag for dot1q sub-interface dot1ad_sub_id = 200 # SubID of dot1ad sub-interface dot1ad_outer_tag = 200 # VLAN S-tag for dot1ad sub-interface dot1ad_inner_tag = 300 # VLAN C-tag for dot1ad sub-interface pkts_per_burst = 257 # Number of packets per burst @classmethod def setUpClass(cls): super(TestL2bd, cls).setUpClass() def setUp(self): super(TestL2bd, self).setUp() # create 3 pg interfaces self.create_pg_interfaces(range(3)) # create 2 sub-interfaces for pg1 and pg2 self.sub_interfaces = [ VppDot1QSubint(self, self.pg1, TestL2bd.dot1q_sub_id), VppDot1QSubint(self, self.pg2, TestL2bd.dot1ad_sub_id)] # packet flows mapping pg0 -> pg1, pg2, etc. self.flows = dict() self.flows[self.pg0] = [self.pg1, self.pg2] self.flows[self.pg1] = [self.pg0, self.pg2] self.flows[self.pg2] = [self.pg0, self.pg1] # packet sizes self.pg_if_packet_sizes = [64, 512, 1518, 9018] self.sub_if_packet_sizes = [64, 512, 1518 + 4, 9018 + 4] self.interfaces = list(self.pg_interfaces) self.interfaces.extend(self.sub_interfaces) # Create BD with MAC learning enabled and put interfaces and # sub-interfaces to this BD for pg_if in self.pg_interfaces: sw_if_index = pg_if.sub_if.sw_if_index if hasattr(pg_if, 'sub_if') \ else pg_if.sw_if_index self.vapi.sw_interface_set_l2_bridge(sw_if_index, bd_id=TestL2bd.bd_id) # setup all interfaces for i in self.interfaces: i.admin_up() # mapping between packet-generator index and lists of test hosts self.hosts_by_pg_idx = dict() # create test host entries and inject packets to learn MAC entries in # the bridge-domain self.create_hosts_and_learn(TestL2bd.mac_entries_count) info(self.vapi.cli("show l2fib")) def tearDown(self): super(TestL2bd, self).tearDown() if not self.vpp_dead: info(self.vapi.cli("show l2fib verbose")) info(self.vapi.cli("show bridge-domain %s detail" % self.bd_id)) def create_hosts_and_learn(self, count): """ Create required number of host MAC addresses and distribute them among interfaces. Create host IPv4 address for every host MAC address. Create L2 MAC packet stream with host MAC addresses per interface to let the bridge domain learn these MAC addresses. :param count: Integer number of hosts to create MAC/IPv4 addresses for. """ n_int = len(self.pg_interfaces) macs_per_if = count / n_int i = -1 for pg_if in self.pg_interfaces: i += 1 start_nr = macs_per_if * i end_nr = count if i == (n_int - 1) else macs_per_if * (i + 1) self.hosts_by_pg_idx[pg_if.sw_if_index] = [] hosts = self.hosts_by_pg_idx[pg_if.sw_if_index] packets = [] for j in range(start_nr, end_nr): host = Host( "00:00:00:ff:%02x:%02x" % (pg_if.sw_if_index, j), "172.17.1%02x.%u" % (pg_if.sw_if_index, j)) packet = (Ether(dst="ff:ff:ff:ff:ff:ff", src=host.mac)) hosts.append(host) if hasattr(pg_if, 'sub_if'): packet = pg_if.sub_if.add_dot1_layer(packet) packets.append(packet) pg_if.add_stream(packets) info("Sending broadcast eth frames for MAC learning") self.pg_start() def create_stream(self, src_if, packet_sizes): pkts = [] for i in range(0, TestL2bd.pkts_per_burst): dst_if = self.flows[src_if][i % 2] 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() if hasattr(src_if, 'sub_if'): p = src_if.sub_if.add_dot1_layer(p) 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.pg_interfaces: last_info[i.sw_if_index] = None dst_sw_if_index = pg_if.sw_if_index for packet in capture: payload_info = self.payload_to_info(str(packet[Raw])) src_sw_if_index = payload_info.src src_if = None for ifc in self.pg_interfaces: if ifc != pg_if: if ifc.sw_if_index == src_sw_if_index: src_if = ifc break if hasattr(src_if, 'sub_if'): # Check VLAN tags and Ethernet header packet = src_if.sub_if.remove_dot1_layer(packet) self.assertTrue(Dot1Q not in packet) try: ip = packet[IP] udp = packet[UDP] 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:") error(packet.show()) raise for i in self.pg_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_l2bd(self): """ L2BD MAC learning test 1.config MAC learning enabled learn 100 MAC enries 3 interfaces: untagged, dot1q, dot1ad (dot1q used instead of dot1ad in the first version) 2.sending l2 eth pkts between 3 interface 64B, 512B, 1518B, 9200B (ether_size) burst of 257 pkts per interface """ # Create incoming packet streams for packet-generator interfaces for i in self.pg_interfaces: packet_sizes = self.sub_if_packet_sizes if hasattr(i, 'sub_if') \ else self.pg_if_packet_sizes pkts = self.create_stream(i, packet_sizes) i.add_stream(pkts) # Enable packet capture 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)