| #!/usr/bin/env python |
| """L2 FIB Test Case HLD: |
| |
| **config 1** |
| - add 4 pg-l2 interfaces |
| - configure them into l2bd |
| - configure 100 MAC entries in L2 fib - 25 MACs per interface |
| - L2 MAC learning and unknown unicast flooding disabled in l2bd |
| - configure 100 MAC entries in L2 fib - 25 MACs per interface |
| |
| **test 1** |
| - send L2 MAC frames between all 4 pg-l2 interfaces for all of 100 MAC \ |
| entries in the FIB |
| |
| **verify 1** |
| - all packets received correctly |
| |
| **config 2** |
| - delete 12 MAC entries - 3 MACs per interface |
| |
| **test 2a** |
| - send L2 MAC frames between all 4 pg-l2 interfaces for non-deleted MAC \ |
| entries |
| |
| **verify 2a** |
| - all packets received correctly |
| |
| **test 2b** |
| - send L2 MAC frames between all 4 pg-l2 interfaces for all of 12 deleted \ |
| MAC entries |
| |
| **verify 2b** |
| - no packet received on all 4 pg-l2 interfaces |
| |
| **config 3** |
| - configure new 100 MAC entries in L2 fib - 25 MACs per interface |
| |
| **test 3** |
| - send L2 MAC frames between all 4 pg-l2 interfaces for all of 188 MAC \ |
| entries in the FIB |
| |
| **verify 3** |
| - all packets received correctly |
| |
| **config 4** |
| - delete 160 MAC entries, 40 MACs per interface |
| |
| **test 4a** |
| - send L2 MAC frames between all 4 pg-l2 interfaces for all of 28 \ |
| non-deleted MAC entries |
| |
| **verify 4a** |
| - all packets received correctly |
| |
| **test 4b** |
| - try send L2 MAC frames between all 4 pg-l2 interfaces for all of 172 \ |
| deleted MAC entries |
| |
| **verify 4b** |
| - no packet received on all 4 pg-l2 interfaces |
| """ |
| |
| import unittest |
| import random |
| |
| from scapy.packet import Raw |
| from scapy.layers.l2 import Ether |
| from scapy.layers.inet import IP, UDP |
| |
| from framework import VppTestCase, VppTestRunner |
| from util import Host, ppp |
| from vpp_papi import mac_pton |
| |
| # from src/vnet/l2/l2_fib.h |
| MAC_EVENT_ACTION_ADD = 0 |
| MAC_EVENT_ACTION_DELETE = 1 |
| MAC_EVENT_ACTION_MOVE = 2 |
| |
| |
| class TestL2fib(VppTestCase): |
| """ L2 FIB Test Case """ |
| |
| @classmethod |
| def bd_ifs(cls, bd_id): |
| return range((bd_id - 1) * cls.n_ifs_per_bd, |
| bd_id * cls.n_ifs_per_bd - 1) |
| |
| @classmethod |
| def setUpClass(cls): |
| """ |
| Perform standard class setup (defined by class method setUpClass in |
| class VppTestCase) before running the test case, set test case related |
| variables and configure VPP. |
| |
| :var int bd_id: Bridge domain ID. |
| """ |
| super(TestL2fib, cls).setUpClass() |
| |
| try: |
| n_brs = cls.n_brs = range(1, 3) |
| cls.n_ifs_per_bd = 4 |
| n_ifs = range(cls.n_ifs_per_bd * len(cls.n_brs)) |
| # Create pg interfaces |
| cls.create_pg_interfaces(n_ifs) |
| |
| cls.flows = dict() |
| for bd_id in n_brs: |
| # Packet flows mapping pg0 -> pg1, pg2, pg3 etc. |
| ifs = cls.bd_ifs(bd_id) |
| for j in ifs: |
| cls.flows[cls.pg_interfaces[j]] = [ |
| cls.pg_interfaces[x] for x in ifs if x != j] |
| |
| # Packet sizes |
| cls.pg_if_packet_sizes = [64, 512, 1518, 9018] |
| |
| for bd_id in n_brs: |
| # Create BD with MAC learning and unknown unicast flooding |
| # disabled and put interfaces to this BD |
| cls.vapi.bridge_domain_add_del( |
| bd_id=bd_id, uu_flood=0, learn=0) |
| ifs = [cls.pg_interfaces[i] for i in cls.bd_ifs(bd_id)] |
| for pg_if in ifs: |
| cls.vapi.sw_interface_set_l2_bridge(pg_if.sw_if_index, |
| bd_id=bd_id) |
| |
| # Set up all interfaces |
| for i in cls.pg_interfaces: |
| i.admin_up() |
| except Exception: |
| super(TestL2fib, cls).tearDownClass() |
| raise |
| |
| def setUp(self): |
| super(TestL2fib, self).setUp() |
| self.reset_packet_infos() |
| |
| def tearDown(self): |
| """ |
| Show various debug prints after each test. |
| """ |
| super(TestL2fib, self).tearDown() |
| if not self.vpp_dead: |
| self.logger.info(self.vapi.ppcli("show l2fib verbose")) |
| for bd_id in self.n_brs: |
| self.logger.info(self.vapi.ppcli("show bridge-domain %s detail" |
| % bd_id)) |
| |
| def create_hosts(self, n_hosts_per_if, subnet): |
| """ |
| Create required number of host MAC addresses and distribute them among |
| interfaces. Create host IPv4 address for every host MAC address. |
| |
| :param int n_hosts_per_if: Number of per interface hosts to |
| create MAC/IPv4 addresses for. |
| """ |
| |
| hosts = dict() |
| for pg_if in self.pg_interfaces: |
| swif = pg_if.sw_if_index |
| |
| def mac(j): return "00:00:%02x:ff:%02x:%02x" % (subnet, swif, j) |
| |
| def ip(j): return "172.%02u.1%02x.%u" % (subnet, swif, j) |
| |
| def h(j): return Host(mac(j), ip(j)) |
| hosts[swif] = [h(j) for j in range(n_hosts_per_if)] |
| return hosts |
| |
| def split_hosts(self, hosts, n): |
| splits = dict() |
| for pg_if in self.pg_interfaces: |
| swif = pg_if.sw_if_index |
| splits[swif] = hosts[swif][:n] |
| hosts[swif] = hosts[swif][n:] |
| return splits |
| |
| def learn_hosts(self, bd_id, hosts): |
| """ |
| Create and send per interface L2 MAC broadcast packet stream to |
| let the bridge domain learn these MAC addresses. |
| |
| :param int bd_id: BD to teach |
| :param dict hosts: dict of hosts per interface |
| """ |
| self.vapi.bridge_flags(bd_id, 1, 1) |
| ifs = [self.pg_interfaces[i] for i in self.bd_ifs(bd_id)] |
| for pg_if in ifs: |
| swif = pg_if.sw_if_index |
| packets = [Ether(dst="ff:ff:ff:ff:ff:ff", src=host.mac) |
| for host in hosts[swif]] |
| pg_if.add_stream(packets) |
| self.logger.info("Sending broadcast eth frames for MAC learning") |
| self.pg_start() |
| |
| def config_l2_fib_entries(self, bd_id, hosts): |
| """ |
| Config required number of L2 FIB entries. |
| |
| :param int bd_id: BD's id |
| :param int count: Number of L2 FIB entries to be created. |
| :param int start: Starting index of the host list. (Default value = 0) |
| """ |
| ifs = [self.pg_interfaces[i] for i in self.bd_ifs(bd_id)] |
| for pg_if in ifs: |
| swif = pg_if.sw_if_index |
| for host in hosts[swif]: |
| self.vapi.l2fib_add_del( |
| mac_pton(host.mac), bd_id, swif, static_mac=1) |
| |
| def delete_l2_fib_entry(self, bd_id, hosts): |
| """ |
| Delete required number of L2 FIB entries. |
| |
| :param int count: Number of L2 FIB entries to be created. |
| """ |
| ifs = [self.pg_interfaces[i] for i in self.bd_ifs(bd_id)] |
| for pg_if in ifs: |
| swif = pg_if.sw_if_index |
| for host in hosts[swif]: |
| self.vapi.l2fib_add_del( |
| mac_pton(host.mac), bd_id, swif, is_add=0) |
| |
| def flush_int(self, swif, learned_hosts): |
| """ |
| Flush swif L2 FIB entries. |
| |
| :param int swif: sw if index. |
| """ |
| flushed = dict() |
| self.vapi.l2fib_flush_int(swif) |
| flushed[swif] = learned_hosts[swif] |
| learned_hosts[swif] = [] |
| return flushed |
| |
| def flush_bd(self, bd_id, learned_hosts): |
| """ |
| Flush bd_id L2 FIB entries. |
| |
| :param int bd_id: Bridge Domain id. |
| """ |
| self.vapi.l2fib_flush_bd(bd_id) |
| flushed = dict() |
| ifs = [self.pg_interfaces[i] for i in self.bd_ifs(bd_id)] |
| for pg_if in ifs: |
| swif = pg_if.sw_if_index |
| flushed[swif] = learned_hosts[swif] |
| learned_hosts[swif] = [] |
| return flushed |
| |
| def flush_all(self): |
| """ |
| Flush All L2 FIB entries. |
| """ |
| self.vapi.l2fib_flush_all() |
| |
| def create_stream(self, src_if, packet_sizes, if_src_hosts, if_dst_hosts): |
| """ |
| Create input packet stream for defined interface using hosts or |
| deleted_hosts list. |
| |
| :param object src_if: Interface to create packet stream for. |
| :param list packet_sizes: List of required packet sizes. |
| :param boolean deleted: Set to True if deleted_hosts list required. |
| :return: Stream of packets. |
| """ |
| src_hosts = if_src_hosts[src_if.sw_if_index] |
| if not src_hosts: |
| return [] |
| pkts = [] |
| for dst_if in self.flows[src_if]: |
| dst_swif = dst_if.sw_if_index |
| if dst_swif not in if_dst_hosts: |
| continue |
| dst_hosts = if_dst_hosts[dst_swif] |
| for dst_host in dst_hosts: |
| src_host = random.choice(src_hosts) |
| pkt_info = self.create_packet_info(src_if, dst_if) |
| 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 = random.choice(packet_sizes) |
| self.extend_packet(p, size) |
| pkts.append(p) |
| return pkts |
| |
| def verify_capture(self, pg_if, capture): |
| """ |
| Verify captured input packet stream for defined interface. |
| |
| :param object pg_if: Interface to verify captured packet stream for. |
| :param list capture: Captured packet stream. |
| """ |
| 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])) |
| try: |
| ip = packet[IP] |
| udp = packet[UDP] |
| packet_index = payload_info.index |
| self.assertEqual(payload_info.dst, dst_sw_if_index) |
| self.logger.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: |
| self.logger.error(ppp("Unexpected or invalid packet:", packet)) |
| 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 run_verify_test(self, bd_id, src_hosts, dst_hosts): |
| # Test |
| # Create incoming packet streams for packet-generator interfaces |
| self.reset_packet_infos() |
| ifs = [self.pg_interfaces[i] for i in self.bd_ifs(bd_id)] |
| for i in ifs: |
| pkts = self.create_stream( |
| i, self.pg_if_packet_sizes, |
| if_src_hosts=src_hosts, |
| if_dst_hosts=dst_hosts) |
| if pkts: |
| i.add_stream(pkts) |
| |
| self.vapi.bridge_flags(bd_id, 0, 1) |
| # Enable packet capture and start packet sending |
| self.pg_enable_capture(ifs) |
| self.pg_start() |
| |
| # Verify |
| # Verify outgoing packet streams per packet-generator interface |
| for i in ifs: |
| if not dst_hosts[i.sw_if_index]: |
| continue |
| capture = i.get_capture() |
| self.logger.info("Verifying capture on interface %s" % i.name) |
| self.verify_capture(i, capture) |
| |
| def run_verify_negat_test(self, bd_id, src_hosts, dst_hosts): |
| # Test |
| # Create incoming packet streams for packet-generator interfaces for |
| # deleted MAC addresses |
| self.reset_packet_infos() |
| ifs = [self.pg_interfaces[i] for i in self.bd_ifs(bd_id)] |
| for i in ifs: |
| pkts = self.create_stream( |
| i, self.pg_if_packet_sizes, |
| if_src_hosts=src_hosts, |
| if_dst_hosts=dst_hosts) |
| if pkts: |
| i.add_stream(pkts) |
| |
| self.vapi.bridge_flags(bd_id, 0, 1) |
| # Enable packet capture and start packet sending |
| self.pg_enable_capture(ifs) |
| self.pg_start() |
| |
| # Verify |
| # Verify outgoing packet streams per packet-generator interface |
| timeout = 1 |
| for i in ifs: |
| i.get_capture(0, timeout=timeout) |
| i.assert_nothing_captured(remark="outgoing interface") |
| timeout = 0.1 |
| |
| def test_l2_fib_program100(self): |
| """ L2 FIB - program 100 MACs |
| """ |
| bd_id = 1 |
| hosts = self.create_hosts(100, subnet=17) |
| self.config_l2_fib_entries(bd_id, hosts) |
| self.run_verify_test(bd_id, hosts, hosts) |
| |
| def test_l2_fib_program100_delete12(self): |
| """ L2 FIB - program 100, delete 12 MACs |
| """ |
| bd_id = 1 |
| hosts = self.create_hosts(100, subnet=17) |
| self.config_l2_fib_entries(bd_id, hosts) |
| del_hosts = self.split_hosts(hosts, 12) |
| self.delete_l2_fib_entry(bd_id, del_hosts) |
| |
| self.run_verify_test(bd_id, hosts, hosts) |
| self.run_verify_negat_test(bd_id, hosts, del_hosts) |
| |
| def test_l2_fib_program100_add100(self): |
| """ L2 FIB - program 100, add 100 MACs |
| """ |
| bd_id = 1 |
| hosts = self.create_hosts(100, subnet=17) |
| self.config_l2_fib_entries(bd_id, hosts) |
| hosts2 = self.create_hosts(100, subnet=22) |
| self.config_l2_fib_entries(bd_id, hosts2) |
| self.run_verify_test(bd_id, hosts, hosts2) |
| |
| def test_l2_fib_program10_learn10(self): |
| """ L2 FIB - program 10 MACs, learn 10 |
| """ |
| hosts = self.create_hosts(20, subnet=35) |
| lhosts = self.split_hosts(hosts, 10) |
| |
| bd1 = 1 |
| bd2 = 2 |
| self.learn_hosts(bd1, lhosts) |
| self.learn_hosts(bd2, lhosts) |
| self.config_l2_fib_entries(bd1, hosts) |
| self.config_l2_fib_entries(bd2, hosts) |
| self.run_verify_test(bd1, lhosts, hosts) |
| self.run_verify_test(bd2, lhosts, hosts) |
| |
| def test_l2_fib_flush_int(self): |
| """ L2 FIB - flush interface |
| """ |
| hosts = self.create_hosts(20, subnet=36) |
| lhosts = self.split_hosts(hosts, 10) |
| |
| bd1 = 1 |
| self.learn_hosts(bd1, lhosts) |
| self.config_l2_fib_entries(bd1, hosts) |
| self.run_verify_test(bd1, lhosts, hosts) |
| flushed = self.flush_int(self.pg_interfaces[0].sw_if_index, lhosts) |
| self.run_verify_test(bd1, hosts, lhosts) |
| self.run_verify_negat_test(bd1, hosts, flushed) |
| |
| def test_l2_fib_flush_bd(self): |
| """ L2 FIB - flush BD |
| """ |
| hosts = self.create_hosts(20, subnet=37) |
| lhosts = self.split_hosts(hosts, 10) |
| |
| bd1 = 1 |
| self.learn_hosts(bd1, lhosts) |
| self.config_l2_fib_entries(bd1, hosts) |
| self.run_verify_test(bd1, lhosts, hosts) |
| flushed = self.flush_bd(bd1, lhosts) |
| self.run_verify_negat_test(bd1, hosts, flushed) |
| |
| def test_l2_fib_flush_all(self): |
| """ L2 FIB - flush all |
| """ |
| hosts = self.create_hosts(20, subnet=38) |
| lhosts = self.split_hosts(hosts, 10) |
| |
| bd1 = 1 |
| bd2 = 2 |
| self.learn_hosts(bd1, lhosts) |
| self.learn_hosts(bd2, lhosts) |
| self.config_l2_fib_entries(bd1, hosts) |
| self.config_l2_fib_entries(bd2, hosts) |
| self.run_verify_test(bd1, hosts, lhosts) |
| self.run_verify_test(bd2, hosts, lhosts) |
| |
| self.flush_all() |
| |
| self.run_verify_negat_test(bd1, hosts, lhosts) |
| self.run_verify_negat_test(bd2, hosts, lhosts) |
| |
| def test_l2_fib_mac_learn_evs(self): |
| """ L2 FIB - mac learning events |
| """ |
| bd1 = 1 |
| hosts = self.create_hosts(10, subnet=39) |
| |
| self.vapi.want_l2_macs_events() |
| self.learn_hosts(bd1, hosts) |
| |
| self.sleep(1) |
| self.logger.info(self.vapi.ppcli("show l2fib")) |
| evs = self.vapi.collect_events() |
| learned_macs = { |
| e.mac[i].mac_addr for e in evs for i in range(e.n_macs) |
| if e.mac[i].action == MAC_EVENT_ACTION_ADD} |
| macs = {h.bin_mac for swif in self.bd_ifs(bd1) |
| for h in hosts[self.pg_interfaces[swif].sw_if_index]} |
| self.vapi.want_l2_macs_events(enable_disable=0) |
| self.assertEqual(len(learned_macs ^ macs), 0) |
| |
| def test_l2_fib_macs_learn_max(self): |
| """ L2 FIB - mac learning max macs in event |
| """ |
| bd1 = 1 |
| hosts = self.create_hosts(10, subnet=40) |
| |
| ev_macs = 1 |
| self.vapi.want_l2_macs_events(max_macs_in_event=ev_macs) |
| self.learn_hosts(bd1, hosts) |
| |
| self.sleep(1) |
| self.logger.info(self.vapi.ppcli("show l2fib")) |
| evs = self.vapi.collect_events() |
| self.vapi.want_l2_macs_events(enable_disable=0) |
| |
| self.assertGreater(len(evs), 0) |
| learned_macs = { |
| e.mac[i].mac_addr for e in evs for i in range(e.n_macs) |
| if e.mac[i].action == MAC_EVENT_ACTION_ADD} |
| macs = {h.bin_mac for swif in self.bd_ifs(bd1) |
| for h in hosts[self.pg_interfaces[swif].sw_if_index]} |
| |
| for e in evs: |
| self.assertLess(len(e), ev_macs * 10) |
| self.assertEqual(len(learned_macs ^ macs), 0) |
| |
| |
| if __name__ == '__main__': |
| unittest.main(testRunner=VppTestRunner) |