--- /dev/null
+#!/usr/bin/env python
+"""L2XC Multi-instance Test Case HLD:
+
+**NOTES:**
+ - higher number (more than 15) of pg-l2 interfaces causes problems => only \
+ 14 pg-l2 interfaces and 10 cross-connects are tested
+ - jumbo packets in configuration with 14 l2-pg interfaces leads to \
+ problems too
+
+**config 1**
+ - add 14 pg-l2 interfaces
+ - add 10 cross-connects (two cross-connects per pair of l2-pg interfaces)
+
+**test 1**
+ - send L2 MAC frames between all pairs of pg-l2 interfaces
+
+**verify 1**
+ - all packets received correctly in case of cross-connected l2-pg interfaces
+ - no packet received in case of not cross-connected l2-pg interfaces
+
+**config 2**
+ - delete 4 cross-connects
+
+**test 2**
+ - send L2 MAC frames between all pairs of pg-l2 interfaces
+
+**verify 2**
+ - all packets received correctly in case of cross-connected l2-pg interfaces
+ - no packet received in case of not cross-connected l2-pg interfaces
+
+**config 3**
+ - add new 4 cross-connects
+
+**test 3**
+ - send L2 MAC frames between all pairs of pg-l2 interfaces
+
+**verify 3**
+ - all packets received correctly in case of cross-connected l2-pg interfaces
+ - no packet received in case of not cross-connected l2-pg interfaces
+
+**config 4**
+ - delete 10 cross-connects
+
+**test 4**
+ - send L2 MAC frames between all pairs of pg-l2 interfaces
+
+**verify 4**
+ - no packet received on all of l2-pg interfaces (no cross-connect created)
+"""
+
+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
+
+
+class TestL2xcMultiInst(VppTestCase):
+ """ L2XC 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(TestL2xcMultiInst, cls).setUpClass()
+
+ try:
+ # Create pg interfaces
+ cls.create_pg_interfaces(range(14))
+
+ # Packet flows mapping pg0 -> pg1 etc.
+ cls.flows = dict()
+ for i in range(len(cls.pg_interfaces)):
+ delta = 1 if i % 2 == 0 else -1
+ cls.flows[cls.pg_interfaces[i]] = [cls.pg_interfaces[i+delta]]
+
+ # Mapping between packet-generator index and lists of test hosts
+ cls.hosts_by_pg_idx = dict()
+ for pg_if in cls.pg_interfaces:
+ cls.hosts_by_pg_idx[pg_if.sw_if_index] = []
+
+ # Create test host entries
+ cls.create_hosts(70)
+
+ # Packet sizes - jumbo packet (9018 bytes) skipped
+ cls.pg_if_packet_sizes = [64, 512, 1518]
+
+ # Set up all interfaces
+ for i in cls.pg_interfaces:
+ i.admin_up()
+
+ # Create list of x-connected pg_interfaces
+ cls.pg_in_xc = list()
+
+ # Create list of not x-connected pg_interfaces
+ cls.pg_not_in_xc = list()
+ for pg_if in cls.pg_interfaces:
+ cls.pg_not_in_xc.append(pg_if)
+
+ except Exception:
+ super(TestL2xcMultiInst, cls).tearDownClass()
+ raise
+
+ def setUp(self):
+ """
+ Clear trace and packet infos before running each test.
+ """
+ super(TestL2xcMultiInst, self).setUp()
+ self.packet_infos = {}
+
+ def tearDown(self):
+ """
+ Show various debug prints after each test.
+ """
+ super(TestL2xcMultiInst, self).tearDown()
+ if not self.vpp_dead:
+ self.logger.info(self.vapi.ppcli("show l2patch"))
+
+ @classmethod
+ def create_hosts(cls, count):
+ """
+ Create required number of host MAC addresses and distribute them among
+ interfaces. Create host IPv4 address for every host MAC address.
+
+ :param int count: Number of hosts to create MAC/IPv4 addresses for.
+ """
+ n_int = len(cls.pg_interfaces)
+ macs_per_if = count / n_int
+ i = -1
+ for pg_if in cls.pg_interfaces:
+ i += 1
+ start_nr = macs_per_if * i
+ end_nr = count if i == (n_int - 1) else macs_per_if * (i + 1)
+ hosts = cls.hosts_by_pg_idx[pg_if.sw_if_index]
+ 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%02u.%u" % (pg_if.sw_if_index, j))
+ hosts.append(host)
+
+ def create_xconnects(self, count, start=0):
+ """
+ Create required number of cross-connects (always two cross-connects per
+ pair of packet-generator interfaces).
+
+ :param int count: Number of cross-connects to be created.
+ :param int start: Starting index of packet-generator interfaces. \
+ (Default value = 0)
+ """
+ for i in range(count):
+ rx_if = self.pg_interfaces[i+start]
+ delta = 1 if i % 2 == 0 else -1
+ tx_if = self.pg_interfaces[i+start+delta]
+ self.vapi.sw_interface_set_l2_xconnect(rx_if.sw_if_index,
+ tx_if.sw_if_index, 1)
+ self.logger.info("Cross-connect from %s to %s created"
+ % (tx_if.name, rx_if.name))
+ if self.pg_in_xc.count(rx_if) == 0:
+ self.pg_in_xc.append(rx_if)
+ if self.pg_not_in_xc.count(rx_if) == 1:
+ self.pg_not_in_xc.remove(rx_if)
+
+ def delete_xconnects(self, count, start=0):
+ """
+ Delete required number of cross-connects (always two cross-connects per
+ pair of packet-generator interfaces).
+
+ :param int count: Number of cross-connects to be deleted.
+ :param int start: Starting index of packet-generator interfaces. \
+ (Default value = 0)
+ """
+ for i in range(count):
+ rx_if = self.pg_interfaces[i+start]
+ delta = 1 if i % 2 == 0 else -1
+ tx_if = self.pg_interfaces[i+start+delta]
+ self.vapi.sw_interface_set_l2_xconnect(rx_if.sw_if_index,
+ tx_if.sw_if_index, 0)
+ self.logger.info("Cross-connect from %s to %s deleted"
+ % (tx_if.name, rx_if.name))
+ if self.pg_not_in_xc.count(rx_if) == 0:
+ self.pg_not_in_xc.append(rx_if)
+ if self.pg_in_xc.count(rx_if) == 1:
+ self.pg_in_xc.remove(rx_if)
+
+ 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 = self.hosts_by_pg_idx[src_if.sw_if_index]
+ for dst_if in self.flows[src_if]:
+ dst_hosts = self.hosts_by_pg_idx[dst_if.sw_if_index]
+ n_int = len(dst_hosts)
+ for i in range(0, n_int):
+ dst_host = dst_hosts[i]
+ src_host = random.choice(src_hosts)
+ 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 = 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:
+ 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("Unexpected or invalid packet:")
+ self.logger.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 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 cross-connects
+ - no packet received on all pg-l2 interfaces not assigned to \
+ cross-connects
+
+ :raise: RuntimeError if no packet captured on l2-pg interface assigned \
+ to the cross-connect or if any packet is captured on l2-pg interface \
+ not assigned to the cross-connect.
+ """
+ # 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:
+ capture = pg_if.get_capture()
+ if pg_if in self.pg_in_xc:
+ if len(capture) == 0:
+ raise RuntimeError("Interface %s is cross-connect sink but "
+ "the capture is empty!" % pg_if.name)
+ self.verify_capture(pg_if, capture)
+ elif pg_if in self.pg_not_in_xc:
+ try:
+ self.assertEqual(len(capture), 0)
+ except AssertionError:
+ raise RuntimeError("Interface %s is not cross-connect sink "
+ "but the capture is not empty!"
+ % pg_if.name)
+ else:
+ self.logger.error("Unknown interface: %s" % pg_if.name)
+
+ def test_l2xc_inst_01(self):
+ """ L2XC Multi-instance test 1 - create 10 cross-connects
+ """
+ # Config 1
+ # Create 10 cross-connects
+ self.create_xconnects(10)
+
+ # Test 1
+ self.run_verify_test()
+
+ def test_l2xc_inst_02(self):
+ """ L2XC Multi-instance test 2 - delete 4 cross-connects
+ """
+ # Config 2
+ # Delete 4 cross-connects
+ self.delete_xconnects(4)
+
+ # Test 2
+ self.run_verify_test()
+
+ def test_l2xc_inst_03(self):
+ """ L2BD Multi-instance 3 - add new 4 cross-connects
+ """
+ # Config 3
+ # Add new 4 cross-connects
+ self.create_xconnects(4, start=10)
+
+ # Test 3
+ self.run_verify_test()
+
+ def test_l2xc_inst_04(self):
+ """ L2XC Multi-instance test 4 - delete 10 cross-connects
+ """
+ # Config 4
+ # Delete 10 cross-connects
+ self.delete_xconnects(10, start=4)
+
+ # Test 4
+ self.run_verify_test()
+
+
+if __name__ == '__main__':
+ unittest.main(testRunner=VppTestRunner)
Code Review / vpp.git / commitdiff