src/vnet/config.h

#!/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 framework import VppTestCase, VppTestRunner
from util import Host, ppp


class TestL2xc(VppTestCase):
    """ L2XC 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.

        :var int hosts_nr: Number of hosts to be created.
        :var int dl_pkts_per_burst: Number of packets in burst for dual-loop
            test.
        :var int sl_pkts_per_burst: Number of packets in burst for single-loop
            test.
        """
        super(TestL2xc, cls).setUpClass()

        # Test variables
        cls.hosts_nr = 10
        cls.dl_pkts_per_burst = 257
        cls.sl_pkts_per_burst = 2

        try:
            # create 4 pg interfaces
            cls.create_pg_interfaces(range(4))

            # packet flows mapping pg0 -> pg1, pg2 -> pg3, etc.
            cls.flows = dict()
            cls.flows[cls.pg0] = [cls.pg1]
            cls.flows[cls.pg1] = [cls.pg0]
            cls.flows[cls.pg2] = [cls.pg3]
            cls.flows[cls.pg3] = [cls.pg2]

            # packet sizes
            cls.pg_if_packet_sizes = [64, 512, 1518, 9018]

            cls.interfaces = list(cls.pg_interfaces)

            # Create bi-directional cross-connects between pg0 and pg1
            cls.vapi.sw_interface_set_l2_xconnect(
                cls.pg0.sw_if_index, cls.pg1.sw_if_index, enable=1)
            cls.vapi.sw_interface_set_l2_xconnect(
                cls.pg1.sw_if_index, cls.pg0.sw_if_index, enable=1)

            # Create bi-directional cross-connects between pg2 and pg3
            cls.vapi.sw_interface_set_l2_xconnect(
                cls.pg2.sw_if_index, cls.pg3.sw_if_index, enable=1)
            cls.vapi.sw_interface_set_l2_xconnect(
                cls.pg3.sw_if_index, cls.pg2.sw_if_index, enable=1)

            # mapping between packet-generator index and lists of test hosts
            cls.hosts_by_pg_idx = dict()

            # Create host MAC and IPv4 lists
            cls.create_host_lists(cls.hosts_nr)

            # setup all interfaces
            for i in cls.interfaces:
                i.admin_up()

        except Exception:
            super(TestL2xc, cls).tearDownClass()
            raise

    def setUp(self):
        super(TestL2xc, self).setUp()
        self.reset_packet_infos()

    def tearDown(self):
        """
        Show various debug prints after each test.
        """
        super(TestL2xc, self).tearDown()
        if not self.vpp_dead:
            self.logger.info(self.vapi.ppcli("show l2patch"))

    @classmethod
    def create_host_lists(cls, 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 cls.pg_interfaces:
            cls.hosts_by_pg_idx[pg_if.sw_if_index] = []
            hosts = cls.hosts_by_pg_idx[pg_if.sw_if_index]
            for j in range(0, count):
                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))
                hosts.append(host)

    def create_stream(self, src_if, packet_sizes, packets_per_burst):
        """
        Create input packet stream for defined interface.

        :param object src_if: Interface to create packet stream for.
        :param list packet_sizes: List of required packet sizes.
        :param int packets_per_burst: Number of packets in burst.
        :return: Stream of packets.
        """
        pkts = []
        for i in range(0, packets_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, 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.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.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.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_l2xc_test(self, pkts_per_burst):
        """ L2XC test """

        # Create incoming packet streams for packet-generator interfaces
        for i in self.interfaces:
            pkts = self.create_stream(i, self.pg_if_packet_sizes,
                                      pkts_per_burst)
            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()
            self.logger.info("Verifying capture on interface %s" % i.name)
            self.verify_capture(i, capture)

    def test_l2xc_sl(self):
        """ L2XC single-loop 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 2 packets per interface
        """

        self.run_l2xc_test(self.sl_pkts_per_burst)

    def test_l2xc_dl(self):
        """ L2XC dual-loop 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 257 packets per interface
        """

        self.run_l2xc_test(self.dl_pkts_per_burst)


if __name__ == '__main__':
    unittest.main(testRunner=VppTestRunner)
Age	Commit message (Collapse)	Author	Files	Lines
2020-11-05	feature: reset interface feature arc on interface deletion	Benoît Ganne	1	-0/+2
	When removing an interface we must reset all per-interface per-feature arc data to ensure we do not get wrong feature arc config data when the sw_if_index is recycled. Type: fix Change-Id: I8c9d850d7c62b7b77193da4258ab5fb9bdda85a6 Signed-off-by: Benoît Ganne <bganne@cisco.com>
2020-05-13	feature: Config end nodes are user specific	Neale Ranns	1	-1/+2
	Type: fix it is possible for a user to change the end node of a feature arc, but this change should only apply to that 'instnace' of the arc, not all arcs. for example, if a tunnel has its ipx-output end node changed to adj-midchain-tx, this shouldn't affect all ipx-output arcs. obviously... Signed-off-by: Neale Ranns <nranns@cisco.com> Change-Id: I41daea7ba6907963e42140307d065c8bcfdcb585
2020-05-04	fib: midchain adjacency optimisations	Neale Ranns	1	-0/+5
	Type: improvement - inline some common encap fixup functions into the midchain rewrite node so we don't incur the cost of the virtual function call - change the copy 'guess' from ethernet_header (which will never happen) to an ip4 header - add adj-midchain-tx to multiarch sources - don't run adj-midchain-tx as a feature, instead put this node as the adj's next and at the end of the feature arc. - cache the feature arc config index (to save the cache miss going to fetch it) - don't check if features are enabled when taking the arc (since we know they are) the last two changes will also benefit normal adjacencies taking the arc (i.e. for NAT, ACLs, etc) for IPSec: - don't run esp_encrypt as a feature, instead when required insert this node into the adj's next and into the end of the feature arc. this implies that encrypt is always 'the last feature' run, which is symmetric with decrypt always being the first. - esp_encrpyt for tunnels has adj-midchain-tx as next node Change-Id: Ida0af56a704302cf2d7797ded5f118a781e8acb7 Signed-off-by: Neale Ranns <nranns@cisco.com>
2016-12-28	Reorganize source tree to use single autotools instance	Damjan Marion	1	-0/+176
	Change-Id: I7b51f88292e057c6443b12224486f2d0c9f8ae23 Signed-off-by: Damjan Marion <damarion@cisco.com>