summaryrefslogtreecommitdiffstats
path: root/src/vppinfra/error_bootstrap.h
blob: 248d389d0f2e6e1b41a959e361b1f322a1458264 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
/*
 * Copyright (c) 2015 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
  Copyright (c) 2001, 2002, 2003 Eliot Dresselhaus

  Permission is hereby granted, free of charge, to any person obtaining
  a copy of this software and associated documentation files (the
  "Software"), to deal in the Software without restriction, including
  without limitation the rights to use, copy, modify, merge, publish,
  distribute, sublicense, and/or sell copies of the Software, and to
  permit persons to whom the Software is furnished to do so, subject to
  the following conditions:

  The above copyright notice and this permission notice shall be
  included in all copies or substantial portions of the Software.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/

#ifndef included_error_bootstrap_h
#define included_error_bootstrap_h

/* Bootstrap include so that #include <vppinfra/mem.h> can include e.g.
   <vppinfra/mheap.h> which depends on <vppinfra/vec.h>. */

#include <vppinfra/clib.h>	/* for uword */

enum
{
  CLIB_ERROR_FATAL = 1 << 0,
  CLIB_ERROR_ABORT = 1 << 1,
  CLIB_ERROR_WARNING = 1 << 2,
  CLIB_ERROR_ERRNO_VALID = 1 << 16,
  CLIB_ERROR_NO_RATE_LIMIT = 1 << 17,
};

/* Current function name.  Need (char *) cast to silence gcc4 pointer signedness warning. */
#define clib_error_function ((char *) __FUNCTION__)

#ifndef CLIB_ASSERT_ENABLE
#define CLIB_ASSERT_ENABLE (CLIB_DEBUG > 0)
#endif

/* Low level error reporting function.
   Code specifies whether to call exit, abort or nothing at
   all (for non-fatal warnings). */
extern void _clib_error (int code,
			 char *function_name,
			 uword line_number, char *format, ...);

#define ASSERT(truth)					\
do {							\
  if (CLIB_ASSERT_ENABLE && ! (truth))			\
    {							\
      _clib_error (CLIB_ERROR_ABORT, 0, 0,		\
		   "%s:%d (%s) assertion `%s' fails",	\
		   __FILE__,				\
		   (uword) __LINE__,			\
		   clib_error_function,			\
		   # truth);				\
    }							\
} while (0)

#if defined(__clang__)
#define STATIC_ASSERT(truth,...)
#else
#define STATIC_ASSERT(truth,...) _Static_assert(truth, __VA_ARGS__)
#endif

#define STATIC_ASSERT_SIZEOF(d, s) \
  STATIC_ASSERT (sizeof (d) == s, "Size of " #d " must be " # s " bytes")

#define STATIC_ASSERT_OFFSET_OF(s, e, o) \
  STATIC_ASSERT (STRUCT_OFFSET_OF(s,e) == o, "Offset of " #s "." #e " must be " # o)

/* Assert without allocating memory. */
#define ASSERT_AND_PANIC(truth)			\
do {						\
  if (CLIB_ASSERT_ENABLE && ! (truth))		\
    os_panic ();				\
} while (0)

#endif /* included_error_bootstrap_h */

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */
611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651
#!/usr/bin/env python
import binascii
import random
import socket
import unittest
import os
import scapy.layers.inet6 as inet6
import threading
import struct

from struct import unpack, unpack_from
from util import ppp, ppc
from re import compile
from scapy.packet import Raw
from scapy.layers.l2 import Ether
from scapy.layers.inet import IP, UDP, ICMP
from scapy.layers.inet6 import IPv6, ICMPv6DestUnreach
from framework import VppTestCase, VppTestRunner


# Format MAC Address
def get_mac_addr(bytes_addr):
    return ':'.join('%02x' % ord(b) for b in bytes_addr)


# Format IP Address
def ipv4(bytes_addr):
    return '.'.join('%d' % ord(b) for b in bytes_addr)


# Unpack Ethernet Frame
def ethernet_frame(data):
    dest_mac, src_mac, proto = struct.unpack('! 6s 6s H', data[:14])
    return dest_mac, src_mac, socket.htons(proto), data[14:]


# Unpack IPv4 Packets
def ipv4_packet(data):
    proto, src, target = struct.unpack('! 8x 1x B 2x 4s 4s', data[:20])
    return proto, src, target, data[20:]


# Unpack IPv6 Packets
def ipv6_packet(data):
    nh, src, target = struct.unpack('! 6x B 1x 16s 16s', data[:40])
    return nh, src, target, data[40:]


# Unpacks any UDP Packet
def udp_seg(data):
    src_port, dest_port, size = struct.unpack('! H H 2x H', data[:8])
    return src_port, dest_port, size, data[8:]


# Unpacks any TCP Packet
def tcp_seg(data):
    src_port, dest_port, seq, flag = struct.unpack('! H H L 4x H', data[:14])
    return src_port, dest_port, seq, data[((flag >> 12) * 4):]


def receivePackets(sock, counters):
    # Wait for some packets on socket
    while True:
        data = sock.recv(65536)

        # punt socket metadata
        # packet_desc = data[0:8]

        # Ethernet
        _, _, eth_proto, data = ethernet_frame(data[8:])
        # Ipv4
        if eth_proto == 8:
            proto, _, _, data = ipv4_packet(data)
            # TCP
            if proto == 6:
                _, dst_port, _, data = udp_seg(data)
            # UDP
            elif proto == 17:
                _, dst_port, _, data = udp_seg(data)
                counters[dst_port] = 0
        # Ipv6
        elif eth_proto == 0xdd86:
            nh, _, _, data = ipv6_packet(data)
            # TCP
            if nh == 6:
                _, dst_port, _, data = udp_seg(data)
            # UDP
            elif nh == 17:
                _, dst_port, _, data = udp_seg(data)
                counters[dst_port] = 0


class serverSocketThread(threading.Thread):
    """ Socket server thread"""

    def __init__(self, threadID, sockName, counters):
        threading.Thread.__init__(self)
        self.threadID = threadID
        self.sockName = sockName
        self.sock = None
        self.counters = counters

    def run(self):
        self.sock = socket.socket(socket.AF_UNIX, socket.SOCK_DGRAM)
        try:
            os.unlink(self.sockName)
        except:
            pass
        self.sock.bind(self.sockName)

        receivePackets(self.sock, self.counters)


class TestPuntSocket(VppTestCase):
    """ Punt Socket """

    ports = [1111, 2222, 3333, 4444]
    sock_servers = list()
    portsCheck = dict()
    nr_packets = 256

    @classmethod
    def setUpClass(cls):
        super(TestPuntSocket, cls).setUpClass()

    @classmethod
    def tearDownClass(cls):
        super(TestPuntSocket, cls).tearDownClass()

    @classmethod
    def setUpConstants(cls):
        cls.extra_vpp_punt_config = [
            "punt", "{", "socket", cls.tempdir+"/socket_punt", "}"]
        super(TestPuntSocket, cls).setUpConstants()

    def setUp(self):
        super(TestPuntSocket, self).setUp()
        random.seed()

        self.create_pg_interfaces(range(2))
        for i in self.pg_interfaces:
            i.admin_up()

    def tearDown(self):
        del self.sock_servers[:]
        super(TestPuntSocket, self).tearDown()

    def socket_client_create(self, sock_name, id=None):
        thread = serverSocketThread(id, sock_name, self.portsCheck)
        self.sock_servers.append(thread)
        thread.start()

    def socket_client_close(self):
        for thread in self.sock_servers:
            thread.sock.close()


class TestIP4PuntSocket(TestPuntSocket):
    """ Punt Socket for IPv4 """

    @classmethod
    def setUpClass(cls):
        super(TestIP4PuntSocket, cls).setUpClass()

    @classmethod
    def tearDownClass(cls):
        super(TestIP4PuntSocket, cls).tearDownClass()

    def setUp(self):
        super(TestIP4PuntSocket, self).setUp()

        for i in self.pg_interfaces:
            i.config_ip4()
            i.resolve_arp()

    def tearDown(self):
        super(TestIP4PuntSocket, self).tearDown()
        for i in self.pg_interfaces:
            i.unconfig_ip4()
            i.admin_down()

    def test_punt_socket_dump(self):
        """ Punt socket registration/deregistration"""

        punts = self.vapi.punt_socket_dump(is_ip6=0)
        self.assertEqual(len(punts), 0)

        #
        # configure a punt socket
        #
        self.vapi.punt_socket_register(1111, self.tempdir+"/socket_punt_1111")
        self.vapi.punt_socket_register(2222, self.tempdir+"/socket_punt_2222")
        punts = self.vapi.punt_socket_dump(is_ip6=0)
        self.assertEqual(len(punts), 2)
        self.assertEqual(punts[0].punt.l4_port, 1111)
        self.assertEqual(punts[1].punt.l4_port, 2222)

        #
        # deregister a punt socket
        #
        self.vapi.punt_socket_deregister(1111)
        punts = self.vapi.punt_socket_dump(is_ip6=0)
        self.assertEqual(len(punts), 1)

        #
        # configure a punt socket again
        #
        self.vapi.punt_socket_register(1111, self.tempdir+"/socket_punt_1111")
        self.vapi.punt_socket_register(3333, self.tempdir+"/socket_punt_3333")
        punts = self.vapi.punt_socket_dump(is_ip6=0)
        self.assertEqual(len(punts), 3)

        #
        # deregister all punt socket
        #
        self.vapi.punt_socket_deregister(1111)
        self.vapi.punt_socket_deregister(2222)
        self.vapi.punt_socket_deregister(3333)
        punts = self.vapi.punt_socket_dump(is_ip6=0)
        self.assertEqual(len(punts), 0)

    def test_punt_socket_traffic_single_port_single_socket(self):
        """ Punt socket traffic single port single socket"""

        port = self.ports[0]

        p = (Ether(src=self.pg0.remote_mac,
                   dst=self.pg0.local_mac) /
             IP(src=self.pg0.remote_ip4, dst=self.pg0.local_ip4) /
             UDP(sport=9876, dport=port) /
             Raw('\xa5' * 100))

        pkts = p * self.nr_packets
        self.portsCheck[port] = self.nr_packets

        punts = self.vapi.punt_socket_dump(is_ip6=0)
        self.assertEqual(len(punts), 0)

        #
        # expect ICMP - port unreachable for all packets
        #
        self.vapi.cli("clear trace")
        self.pg0.add_stream(pkts)
        self.pg_enable_capture(self.pg_interfaces)
        self.pg_start()
        # FIXME - when punt socket deregister is implemented
        # rx = self.pg0.get_capture(self.nr_packets)
        # for p in rx:
        #     self.assertEqual(int(p[IP].proto), 1)   # ICMP
        #     self.assertEqual(int(p[ICMP].code), 3)  # unreachable

        #
        # configure a punt socket
        #
        self.socket_client_create(self.tempdir+"/socket_" + str(port))
        self.vapi.punt_socket_register(port, self.tempdir+"/socket_" +
                                       str(port))
        punts = self.vapi.punt_socket_dump(is_ip6=0)
        self.assertEqual(len(punts), 1)

        self.logger.debug("Sending %s packets to port %d",
                          str(self.portsCheck[port]), port)
        #
        # expect punt socket and no packets on pg0
        #
        self.vapi.cli("clear errors")
        self.vapi.cli("clear trace")
        self.pg0.add_stream(pkts)
        self.pg_enable_capture(self.pg_interfaces)
        self.pg_start()
        self.pg0.get_capture(0)
        self.logger.info(self.vapi.cli("show trace"))
        self.socket_client_close()
        self.assertEqual(self.portsCheck[port], 0)

        #
        # remove punt socket. expect ICMP - port unreachable for all packets
        #
        self.vapi.punt_socket_deregister(port)
        punts = self.vapi.punt_socket_dump(is_ip6=0)
        self.assertEqual(len(punts), 0)
        self.pg0.add_stream(pkts)
        self.pg_enable_capture(self.pg_interfaces)
        self.pg_start()
        # FIXME - when punt socket deregister is implemented
        # self.pg0.get_capture(nr_packets)

    def test_punt_socket_traffic_multi_port_multi_sockets(self):
        """ Punt socket traffic multi ports and multi sockets"""

        for p in self.ports:
            self.portsCheck[p] = 0

        #
        # create stream with random pakets count per given ports
        #
        pkts = list()
        for _ in range(0, self.nr_packets):
            # choose port from port list
            p = random.choice(self.ports)
            pkts.append((
                Ether(src=self.pg0.remote_mac,
                      dst=self.pg0.local_mac) /
                IP(src=self.pg0.remote_ip4, dst=self.pg0.local_ip4) /
                UDP(sport=9876, dport=p) /
                Raw('\xa5' * 100)))
            self.portsCheck[p] += 1
        #
        # no punt socket
        #
        punts = self.vapi.punt_socket_dump(is_ip6=0)
        self.assertEqual(len(punts), 0)

        #
        # configure a punt socket
        #
        for p in self.ports:
            self.socket_client_create(self.tempdir+"/socket_" + str(p))
            self.vapi.punt_socket_register(p, self.tempdir+"/socket_" + str(p))
        punts = self.vapi.punt_socket_dump(is_ip6=0)
        self.assertEqual(len(punts), len(self.ports))

        for p in self.ports:
            self.logger.debug("Sending %s packets to port %d",
                              str(self.portsCheck[p]), p)

        #
        # expect punt socket and no packets on pg0
        #
        self.vapi.cli("clear errors")
        self.vapi.cli("clear trace")
        self.pg0.add_stream(pkts)
        self.pg_enable_capture(self.pg_interfaces)
        self.pg_start()
        self.pg0.get_capture(0)
        self.logger.info(self.vapi.cli("show trace"))
        self.socket_client_close()

        for p in self.ports:
            self.assertEqual(self.portsCheck[p], 0)
            self.vapi.punt_socket_deregister(p)
        punts = self.vapi.punt_socket_dump(is_ip6=0)
        self.assertEqual(len(punts), 0)

    def test_punt_socket_traffic_multi_ports_single_socket(self):
        """ Punt socket traffic multi ports and single socket"""

        for p in self.ports:
            self.portsCheck[p] = 0

        #
        # create stream with random pakets count per given ports
        #
        pkts = list()
        for _ in range(0, self.nr_packets):
            # choose port from port list
            p = random.choice(self.ports)
            pkts.append((
                Ether(src=self.pg0.remote_mac,
                      dst=self.pg0.local_mac) /
                IP(src=self.pg0.remote_ip4, dst=self.pg0.local_ip4) /
                UDP(sport=9876, dport=p) /
                Raw('\xa5' * 100)))
            self.portsCheck[p] += 1

        #
        # no punt socket
        #
        punts = self.vapi.punt_socket_dump(is_ip6=0)
        self.assertEqual(len(punts), 0)

        # configure a punt socket
        #
        self.socket_client_create(self.tempdir+"/socket_multi")
        for p in self.ports:
            self.vapi.punt_socket_register(p, self.tempdir+"/socket_multi")
        punts = self.vapi.punt_socket_dump(is_ip6=0)
        self.assertEqual(len(punts), len(self.ports))

        for p in self.ports:
            self.logger.debug("Sending %s packets to port %d",
                              str(self.portsCheck[p]), p)
        #
        # expect punt socket and no packets on pg0
        #
        self.vapi.cli("clear errors")
        self.vapi.cli("clear trace")
        self.pg0.add_stream(pkts)
        self.pg_enable_capture(self.pg_interfaces)
        self.pg_start()
        self.pg0.get_capture(0)
        self.logger.info(self.vapi.cli("show trace"))
        self.socket_client_close()

        for p in self.ports:
            self.assertEqual(self.portsCheck[p], 0)
            self.vapi.punt_socket_deregister(p)
        punts = self.vapi.punt_socket_dump(is_ip6=0)
        self.assertEqual(len(punts), 0)


class TestIP6PuntSocket(TestPuntSocket):
    """ Punt Socket for IPv6"""

    @classmethod
    def setUpClass(cls):
        super(TestIP6PuntSocket, cls).setUpClass()

    @classmethod
    def tearDownClass(cls):
        super(TestIP6PuntSocket, cls).tearDownClass()

    def setUp(self):
        super(TestIP6PuntSocket, self).setUp()

        for i in self.pg_interfaces:
            i.config_ip6()
            i.resolve_ndp()

    def tearDown(self):
        super(TestIP6PuntSocket, self).tearDown()
        for i in self.pg_interfaces:
            i.unconfig_ip6()
            i.admin_down()

    def test_punt_socket_dump(self):
        """ Punt socket registration """

        punts = self.vapi.punt_socket_dump(is_ip6=1)
        self.assertEqual(len(punts), 0)

        #
        # configure a punt socket
        #
        self.vapi.punt_socket_register(1111, self.tempdir+"/socket_1111",
                                       is_ip4=0)
        self.vapi.punt_socket_register(2222, self.tempdir+"/socket_2222",
                                       is_ip4=0)
        punts = self.vapi.punt_socket_dump(is_ip6=1)
        self.assertEqual(len(punts), 2)
        self.assertEqual(punts[0].punt.l4_port, 1111)
        self.assertEqual(punts[1].punt.l4_port, 2222)

        #
        # deregister a punt socket
        #
        self.vapi.punt_socket_deregister(1111, is_ip4=0)
        punts = self.vapi.punt_socket_dump(is_ip6=1)
        self.assertEqual(len(punts), 1)

        #
        # configure a punt socket again
        #
        self.vapi.punt_socket_register(1111, self.tempdir+"/socket_1111",
                                       is_ip4=0)
        punts = self.vapi.punt_socket_dump(is_ip6=1)
        self.assertEqual(len(punts), 2)

        #
        # deregister all punt socket
        #
        self.vapi.punt_socket_deregister(1111, is_ip4=0)
        self.vapi.punt_socket_deregister(2222, is_ip4=0)
        self.vapi.punt_socket_deregister(3333, is_ip4=0)
        punts = self.vapi.punt_socket_dump(is_ip6=1)
        self.assertEqual(len(punts), 0)

    def test_punt_socket_traffic_single_port_single_socket(self):
        """ Punt socket traffic single port single socket"""

        port = self.ports[0]

        p = (Ether(src=self.pg0.remote_mac,
                   dst=self.pg0.local_mac) /
             IPv6(src=self.pg0.remote_ip6, dst=self.pg0.local_ip6) /
             inet6.UDP(sport=9876, dport=port) /
             Raw('\xa5' * 100))

        pkts = p * self.nr_packets
        self.portsCheck[port] = self.nr_packets

        punts = self.vapi.punt_socket_dump(is_ip6=1)
        self.assertEqual(len(punts), 0)

        #
        # expect ICMPv6 - destination unreachable for all packets
        #
        self.vapi.cli("clear trace")
        self.pg0.add_stream(pkts)
        self.pg_enable_capture(self.pg_interfaces)
        self.pg_start()
        # FIXME - when punt socket deregister is implemented
        # rx = self.pg0.get_capture(self.nr_packets)
        # for p in rx:
        #     self.assertEqual(int(p[IPv6].nh), 58)                # ICMPv6
        #     self.assertEqual(int(p[ICMPv6DestUnreach].code),4)  # unreachable

        #
        # configure a punt socket
        #
        self.socket_client_create(self.tempdir+"/socket_" + str(port))
        self.vapi.punt_socket_register(port, self.tempdir+"/socket_" +
                                       str(port), is_ip4=0)
        punts = self.vapi.punt_socket_dump(is_ip6=1)
        self.assertEqual(len(punts), 1)

        self.logger.debug("Sending %s packets to port %d",
                          str(self.portsCheck[port]), port)
        #
        # expect punt socket and no packets on pg0
        #
        self.vapi.cli("clear errors")
        self.vapi.cli("clear trace")
        self.pg0.add_stream(pkts)
        self.pg_enable_capture(self.pg_interfaces)
        self.pg_start()
        self.pg0.get_capture(0)
        self.logger.info(self.vapi.cli("show trace"))
        self.socket_client_close()
        self.assertEqual(self.portsCheck[port], 0)

        #
        # remove punt socket. expect ICMP - dest. unreachable for all packets
        #
        self.vapi.punt_socket_deregister(port, is_ip4=0)
        punts = self.vapi.punt_socket_dump(is_ip6=1)
        self.assertEqual(len(punts), 0)
        self.pg0.add_stream(pkts)
        self.pg_enable_capture(self.pg_interfaces)
        self.pg_start()
        # FIXME - when punt socket deregister is implemented
        # self.pg0.get_capture(nr_packets)

    def test_punt_socket_traffic_multi_port_multi_sockets(self):
        """ Punt socket traffic multi ports and multi sockets"""

        for p in self.ports:
            self.portsCheck[p] = 0

        #
        # create stream with random pakets count per given ports
        #
        pkts = list()
        for _ in range(0, self.nr_packets):
            # choose port from port list
            p = random.choice(self.ports)
            pkts.append((
                Ether(src=self.pg0.remote_mac,
                      dst=self.pg0.local_mac) /
                IPv6(src=self.pg0.remote_ip6, dst=self.pg0.local_ip6) /
                inet6.UDP(sport=9876, dport=p) /
                Raw('\xa5' * 100)))
            self.portsCheck[p] += 1
        #
        # no punt socket
        #
        punts = self.vapi.punt_socket_dump(is_ip6=1)
        self.assertEqual(len(punts), 0)

        #
        # configure a punt socket
        #
        for p in self.ports:
            self.socket_client_create(self.tempdir+"/socket_" + str(p))
            self.vapi.punt_socket_register(p, self.tempdir+"/socket_" + str(p),
                                           is_ip4=0)
        punts = self.vapi.punt_socket_dump(is_ip6=1)
        self.assertEqual(len(punts), len(self.ports))

        for p in self.ports:
            self.logger.debug("Sending %s packets to port %d",
                              str(self.portsCheck[p]), p)

        #
        # expect punt socket and no packets on pg0
        #
        self.vapi.cli("clear errors")
        self.vapi.cli("clear trace")
        self.pg0.add_stream(pkts)
        self.pg_enable_capture(self.pg_interfaces)
        self.pg_start()
        self.pg0.get_capture(0)
        self.logger.info(self.vapi.cli("show trace"))
        self.socket_client_close()

        for p in self.ports:
            self.assertEqual(self.portsCheck[p], 0)
            self.vapi.punt_socket_deregister(p, is_ip4=0)
        punts = self.vapi.punt_socket_dump(is_ip6=1)
        self.assertEqual(len(punts), 0)

    def test_punt_socket_traffic_multi_ports_single_socket(self):
        """ Punt socket traffic multi ports and single socket"""

        for p in self.ports:
            self.portsCheck[p] = 0

        #
        # create stream with random pakets count per given ports
        #
        pkts = list()
        for _ in range(0, self.nr_packets):
            # choose port from port list
            p = random.choice(self.ports)
            pkts.append((
                Ether(src=self.pg0.remote_mac,
                      dst=self.pg0.local_mac) /
                IPv6(src=self.pg0.remote_ip6, dst=self.pg0.local_ip6) /
                inet6.UDP(sport=9876, dport=p) /
                Raw('\xa5' * 100)))
            self.portsCheck[p] += 1

        #
        # no punt socket
        #
        punts = self.vapi.punt_socket_dump(is_ip6=1)
        self.assertEqual(len(punts), 0)

        #
        # configure a punt socket
        #
        self.socket_client_create(self.tempdir+"/socket_multi")
        for p in self.ports:
            self.vapi.punt_socket_register(p, self.tempdir+"/socket_multi",
                                           is_ip4=0)
        punts = self.vapi.punt_socket_dump(is_ip6=1)
        self.assertEqual(len(punts), len(self.ports))

        for p in self.ports:
            self.logger.debug("Send %s packets to port %d",
                              str(self.portsCheck[p]), p)
        #
        # expect punt socket and no packets on pg0
        #
        self.vapi.cli("clear errors")
        self.vapi.cli("clear trace")
        self.pg0.add_stream(pkts)
        self.pg_enable_capture(self.pg_interfaces)
        self.pg_start()
        self.pg0.get_capture(0)
        self.logger.info(self.vapi.cli("show trace"))
        self.socket_client_close()

        for p in self.ports:
            self.assertEqual(self.portsCheck[p], 0)
            self.vapi.punt_socket_deregister(p, is_ip4=0)
        punts = self.vapi.punt_socket_dump(is_ip6=1)
        self.assertEqual(len(punts), 0)

if __name__ == '__main__':
    unittest.main(testRunner=VppTestRunner)