| #!/usr/bin/env python |
| """IP4 VRF Multi-instance Test Case HLD: |
| |
| **NOTES:** |
| - higher number of pg-ip4 interfaces causes problems => only 15 pg-ip4 \ |
| interfaces in 5 VRFs are tested |
| - jumbo packets in configuration with 15 pg-ip4 interfaces leads to \ |
| problems too |
| - Reset of FIB table / VRF does not remove routes from IP FIB (see Jira \ |
| ticket https://jira.fd.io/browse/VPP-560) so checks of reset VRF tables \ |
| are skipped in tests 2, 3 and 4 |
| |
| **config 1** |
| - add 15 pg-ip4 interfaces |
| - configure 5 hosts per pg-ip4 interface |
| - configure 4 VRFs |
| - add 3 pg-ip4 interfaces per VRF |
| |
| **test 1** |
| - send IP4 packets between all pg-ip4 interfaces in all VRF groups |
| |
| **verify 1** |
| - check VRF data by parsing output of ip_fib_dump API command |
| - all packets received correctly in case of pg-ip4 interfaces in VRF |
| - no packet received in case of pg-ip4 interfaces not in VRF |
| |
| **config 2** |
| - delete 2 VRFs |
| |
| **test 2** |
| - send IP4 packets between all pg-ip4 interfaces in all VRF groups |
| |
| **verify 2** |
| - check VRF data by parsing output of ip_fib_dump API command |
| - all packets received correctly in case of pg-ip4 interfaces in VRF |
| - no packet received in case of pg-ip4 interfaces not in VRF |
| |
| **config 3** |
| - add 1 of deleted VRFs and 1 new VRF |
| |
| **test 3** |
| - send IP4 packets between all pg-ip4 interfaces in all VRF groups |
| |
| **verify 3** |
| - check VRF data by parsing output of ip_fib_dump API command |
| - all packets received correctly in case of pg-ip4 interfaces in VRF |
| - no packet received in case of pg-ip4 interfaces not in VRF |
| |
| **config 4** |
| - delete all VRFs (i.e. no VRF except VRF=0 created) |
| |
| **test 4** |
| - send IP4 packets between all pg-ip4 interfaces in all VRF groups |
| |
| **verify 4** |
| - check VRF data by parsing output of ip_fib_dump API command |
| - all packets received correctly in case of pg-ip4 interfaces in VRF |
| - no packet received in case of pg-ip4 interfaces not in VRF |
| """ |
| |
| import unittest |
| import random |
| |
| from scapy.packet import Raw |
| from scapy.layers.l2 import Ether |
| from scapy.layers.inet import IP, UDP, ARP |
| |
| from framework import VppTestCase, VppTestRunner |
| from util import ppp |
| |
| |
| def is_ipv4_misc(p): |
| """ Is packet one of uninteresting IPv4 broadcasts? """ |
| if p.haslayer(ARP): |
| return True |
| return False |
| |
| |
| class TestIp4VrfMultiInst(VppTestCase): |
| """ IP4 VRF Multi-instance Test Case """ |
| |
| @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. |
| """ |
| super(TestIp4VrfMultiInst, cls).setUpClass() |
| |
| # Test variables |
| cls.hosts_per_pg = 5 |
| cls.nr_of_vrfs = 5 |
| cls.pg_ifs_per_vrf = 3 |
| |
| try: |
| # Create pg interfaces |
| cls.create_pg_interfaces( |
| range(cls.nr_of_vrfs * cls.pg_ifs_per_vrf)) |
| |
| # Packet flows mapping pg0 -> pg1, pg2 etc. |
| cls.flows = dict() |
| for i in range(len(cls.pg_interfaces)): |
| multiplicand = i / cls.pg_ifs_per_vrf |
| pg_list = [ |
| cls.pg_interfaces[multiplicand * cls.pg_ifs_per_vrf + j] |
| for j in range(cls.pg_ifs_per_vrf) |
| if (multiplicand * cls.pg_ifs_per_vrf + j) != i] |
| cls.flows[cls.pg_interfaces[i]] = pg_list |
| |
| # Packet sizes - jumbo packet (9018 bytes) skipped |
| cls.pg_if_packet_sizes = [64, 512, 1518] |
| |
| # Set up all interfaces |
| for pg_if in cls.pg_interfaces: |
| pg_if.admin_up() |
| pg_if.generate_remote_hosts(cls.hosts_per_pg) |
| |
| # Create list of VRFs |
| cls.vrf_list = list() |
| |
| # Create list of deleted VRFs |
| cls.vrf_deleted_list = list() |
| |
| # Create list of pg_interfaces in VRFs |
| cls.pg_in_vrf = list() |
| |
| # Create list of pg_interfaces not in BDs |
| cls.pg_not_in_vrf = [pg_if for pg_if in cls.pg_interfaces] |
| |
| # Create mapping of pg_interfaces to VRF IDs |
| cls.pg_if_by_vrf_id = dict() |
| for i in range(cls.nr_of_vrfs): |
| vrf_id = i + 1 |
| pg_list = [ |
| cls.pg_interfaces[i * cls.pg_ifs_per_vrf + j] |
| for j in range(cls.pg_ifs_per_vrf)] |
| cls.pg_if_by_vrf_id[vrf_id] = pg_list |
| |
| except Exception: |
| super(TestIp4VrfMultiInst, cls).tearDownClass() |
| raise |
| |
| def setUp(self): |
| """ |
| Clear trace and packet infos before running each test. |
| """ |
| super(TestIp4VrfMultiInst, self).setUp() |
| self.reset_packet_infos() |
| |
| def tearDown(self): |
| """ |
| Show various debug prints after each test. |
| """ |
| super(TestIp4VrfMultiInst, self).tearDown() |
| if not self.vpp_dead: |
| self.logger.info(self.vapi.ppcli("show ip fib")) |
| self.logger.info(self.vapi.ppcli("show ip arp")) |
| |
| def create_vrf_and_assign_interfaces(self, count, start=1): |
| """ |
| Create required number of FIB tables / VRFs, put 3 l2-pg interfaces |
| to every FIB table / VRF. |
| |
| :param int count: Number of FIB tables / VRFs to be created. |
| :param int start: Starting number of the FIB table / VRF ID. \ |
| (Default value = 1) |
| """ |
| |
| for i in range(count): |
| vrf_id = i + start |
| pg_if = self.pg_if_by_vrf_id[vrf_id][0] |
| dest_addr = pg_if.remote_hosts[0].ip4n |
| dest_addr_len = 24 |
| self.vapi.ip_table_add_del(vrf_id, is_add=1) |
| self.vapi.ip_add_del_route( |
| dest_addr, dest_addr_len, pg_if.local_ip4n, |
| table_id=vrf_id, is_multipath=1) |
| self.logger.info("IPv4 VRF ID %d created" % vrf_id) |
| if vrf_id not in self.vrf_list: |
| self.vrf_list.append(vrf_id) |
| if vrf_id in self.vrf_deleted_list: |
| self.vrf_deleted_list.remove(vrf_id) |
| for j in range(self.pg_ifs_per_vrf): |
| pg_if = self.pg_if_by_vrf_id[vrf_id][j] |
| pg_if.set_table_ip4(vrf_id) |
| self.logger.info("pg-interface %s added to IPv4 VRF ID %d" |
| % (pg_if.name, vrf_id)) |
| if pg_if not in self.pg_in_vrf: |
| self.pg_in_vrf.append(pg_if) |
| if pg_if in self.pg_not_in_vrf: |
| self.pg_not_in_vrf.remove(pg_if) |
| pg_if.config_ip4() |
| pg_if.configure_ipv4_neighbors() |
| self.logger.debug(self.vapi.ppcli("show ip fib")) |
| self.logger.debug(self.vapi.ppcli("show ip arp")) |
| |
| def delete_vrf(self, vrf_id): |
| """ |
| Delete required FIB table / VRF. |
| |
| :param int vrf_id: The FIB table / VRF ID to be deleted. |
| """ |
| # self.vapi.reset_vrf(vrf_id, is_ipv6=0) |
| self.vapi.reset_fib(vrf_id, is_ipv6=0) |
| if vrf_id in self.vrf_list: |
| self.vrf_list.remove(vrf_id) |
| if vrf_id not in self.vrf_deleted_list: |
| self.vrf_deleted_list.append(vrf_id) |
| for j in range(self.pg_ifs_per_vrf): |
| pg_if = self.pg_if_by_vrf_id[vrf_id][j] |
| pg_if.unconfig_ip4() |
| if pg_if in self.pg_in_vrf: |
| self.pg_in_vrf.remove(pg_if) |
| if pg_if not in self.pg_not_in_vrf: |
| self.pg_not_in_vrf.append(pg_if) |
| self.logger.info("IPv4 VRF ID %d reset" % vrf_id) |
| self.logger.debug(self.vapi.ppcli("show ip fib")) |
| self.logger.debug(self.vapi.ppcli("show ip arp")) |
| self.vapi.ip_table_add_del(vrf_id, is_add=0) |
| |
| def create_stream(self, src_if, packet_sizes): |
| """ |
| Create input packet stream for defined interface using hosts list. |
| |
| :param object src_if: Interface to create packet stream for. |
| :param list packet_sizes: List of required packet sizes. |
| :return: Stream of packets. |
| """ |
| pkts = [] |
| src_hosts = src_if.remote_hosts |
| for dst_if in self.flows[src_if]: |
| for dst_host in dst_if.remote_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=src_if.local_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) |
| self.logger.debug("Input stream created for port %s. Length: %u pkt(s)" |
| % (src_if.name, len(pkts))) |
| 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: |
| 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) |
| 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.assertIsNotNone(next_info) |
| 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.assertIsNone( |
| remaining_packet, |
| "Port %u: Packet expected from source %u didn't arrive" % |
| (dst_sw_if_index, i.sw_if_index)) |
| |
| def verify_vrf(self, vrf_id): |
| """ |
| Check if the FIB table / VRF ID is configured. |
| |
| :param int vrf_id: The FIB table / VRF ID to be verified. |
| :return: 1 if the FIB table / VRF ID is configured, otherwise return 0. |
| """ |
| ip_fib_dump = self.vapi.ip_fib_dump() |
| vrf_count = 0 |
| for ip_fib_details in ip_fib_dump: |
| if ip_fib_details[2] == vrf_id: |
| vrf_count += 1 |
| if vrf_count == 0: |
| self.logger.info("IPv4 VRF ID %d is not configured" % vrf_id) |
| return 0 |
| else: |
| self.logger.info("IPv4 VRF ID %d is configured" % vrf_id) |
| return 1 |
| |
| def run_verify_test(self): |
| """ |
| Create packet streams for all configured l2-pg interfaces, send all \ |
| prepared packet streams and verify that: |
| - all packets received correctly on all pg-l2 interfaces assigned |
| to bridge domains |
| - no packet received on all pg-l2 interfaces not assigned to bridge |
| domains |
| |
| :raise RuntimeError: If no packet captured on l2-pg interface assigned |
| to the bridge domain or if any packet is captured on l2-pg |
| interface not assigned to the bridge domain. |
| """ |
| # Test |
| # Create incoming packet streams for packet-generator interfaces |
| for pg_if in self.pg_interfaces: |
| pkts = self.create_stream(pg_if, self.pg_if_packet_sizes) |
| pg_if.add_stream(pkts) |
| |
| # Enable packet capture and start packet sending |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| # Verify |
| # Verify outgoing packet streams per packet-generator interface |
| for pg_if in self.pg_interfaces: |
| if pg_if in self.pg_in_vrf: |
| capture = pg_if.get_capture(remark="interface is in VRF") |
| self.verify_capture(pg_if, capture) |
| elif pg_if in self.pg_not_in_vrf: |
| pg_if.assert_nothing_captured(remark="interface is not in VRF", |
| filter_out_fn=is_ipv4_misc) |
| self.logger.debug("No capture for interface %s" % pg_if.name) |
| else: |
| raise Exception("Unknown interface: %s" % pg_if.name) |
| |
| def test_ip4_vrf_01(self): |
| """ IP4 VRF Multi-instance test 1 - create 5 BDs |
| """ |
| # Config 1 |
| # Create 4 VRFs |
| self.create_vrf_and_assign_interfaces(4) |
| |
| # Verify 1 |
| for vrf_id in self.vrf_list: |
| self.assertEqual(self.verify_vrf(vrf_id), 1) |
| |
| # Test 1 |
| self.run_verify_test() |
| |
| def test_ip4_vrf_02(self): |
| """ IP4 VRF Multi-instance test 2 - delete 2 VRFs |
| """ |
| # Config 2 |
| # Delete 2 VRFs |
| self.delete_vrf(1) |
| self.delete_vrf(2) |
| |
| # Verify 2 |
| # for vrf_id in self.vrf_deleted_list: |
| # self.assertEqual(self.verify_vrf(vrf_id), 0) |
| for vrf_id in self.vrf_list: |
| self.assertEqual(self.verify_vrf(vrf_id), 1) |
| |
| # Test 2 |
| self.run_verify_test() |
| |
| def test_ip4_vrf_03(self): |
| """ IP4 VRF Multi-instance 3 - add 2 VRFs |
| """ |
| # Config 3 |
| # Add 1 of deleted VRFs and 1 new VRF |
| self.create_vrf_and_assign_interfaces(1) |
| self.create_vrf_and_assign_interfaces(1, start=5) |
| |
| # Verify 3 |
| # for vrf_id in self.vrf_deleted_list: |
| # self.assertEqual(self.verify_vrf(vrf_id), 0) |
| for vrf_id in self.vrf_list: |
| self.assertEqual(self.verify_vrf(vrf_id), 1) |
| |
| # Test 3 |
| self.run_verify_test() |
| |
| def test_ip4_vrf_04(self): |
| """ IP4 VRF Multi-instance test 4 - delete 4 VRFs |
| """ |
| # Config 4 |
| # Delete all VRFs (i.e. no VRF except VRF=0 created) |
| for i in range(len(self.vrf_list)): |
| self.delete_vrf(self.vrf_list[0]) |
| |
| # Verify 4 |
| # for vrf_id in self.vrf_deleted_list: |
| # self.assertEqual(self.verify_vrf(vrf_id), 0) |
| for vrf_id in self.vrf_list: |
| self.assertEqual(self.verify_vrf(vrf_id), 1) |
| |
| # Test 4 |
| self.run_verify_test() |
| |
| |
| if __name__ == '__main__': |
| unittest.main(testRunner=VppTestRunner) |