/*
* Copyright (c) 2011-2016 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.
*/
/**
* @file
* @brief BFD UDP transport layer implementation
*/
#include <vppinfra/types.h>
#include <vlibmemory/api.h>
#include <vlib/vlib.h>
#include <vlib/buffer.h>
#include <vnet/ip/format.h>
#include <vnet/ethernet/packet.h>
#include <vnet/udp/udp_local.h>
#include <vnet/udp/udp_packet.h>
#include <vnet/ip/lookup.h>
#include <vnet/ip/icmp46_packet.h>
#include <vnet/ip/ip4.h>
#include <vnet/ip/ip6.h>
#include <vnet/ip/ip6_packet.h>
#include <vnet/ip/ip6_link.h>
#include <vnet/adj/adj.h>
#include <vnet/adj/adj_nbr.h>
#include <vnet/dpo/receive_dpo.h>
#include <vnet/fib/fib_entry.h>
#include <vnet/fib/fib_table.h>
#include <vpp/stats/stat_segment.h>
#include <vnet/bfd/bfd_debug.h>
#include <vnet/bfd/bfd_udp.h>
#include <vnet/bfd/bfd_main.h>
#include <vnet/bfd/bfd_api.h>
typedef struct
{
bfd_main_t *bfd_main;
/* hashmap - bfd session index by bfd key - used for CLI/API lookup, where
* discriminator is unknown */
mhash_t bfd_session_idx_by_bfd_key;
/* convenience variable */
vnet_main_t *vnet_main;
/* flag indicating whether echo_source_sw_if_index holds a valid value */
int echo_source_is_set;
/* loopback interface used to get echo source ip */
u32 echo_source_sw_if_index;
/* node index of "ip4-arp" node */
u32 ip4_arp_idx;
/* node index of "ip6-discover-neighbor" node */
u32 ip6_ndp_idx;
/* node index of "ip4-rewrite" node */
u32 ip4_rewrite_idx;
/* node index of "ip6-rewrite" node */
u32 ip6_rewrite_idx;
/* node index of "ip4-midchain" node */
u32 ip4_midchain_idx;
/* node index of "ip6-midchain" node */
u32 ip6_midchain_idx;
/* log class */
vlib_log_class_t log_class;
/* number of active udp4 sessions */
u32 udp4_sessions_count;
u32 udp4_sessions_count_stat_seg_entry;
/* number of active udp6 sessions */
u32 udp6_sessions_count;
u32 udp6_sessions_count_stat_seg_entry;
} bfd_udp_main_t;
static vlib_node_registration_t bfd_udp4_input_node;
static vlib_node_registration_t bfd_udp6_input_node;
static vlib_node_registration_t bfd_udp_echo4_input_node;
static vlib_node_registration_t bfd_udp_echo6_input_node;
bfd_udp_main_t bfd_udp_main;
void
bfd_udp_update_stat_segment_entry (u32 entry, u64 value)
{
vlib_stat_segment_lock ();
stat_segment_set_state_counter (entry, value);
vlib_stat_segment_unlock ();
}
vnet_api_error_t
bfd_udp_set_echo_source (u32 sw_if_index)
{
vnet_sw_interface_t *sw_if =
vnet_get_sw_interface_or_null (bfd_udp_main.vnet_main, sw_if_index);
if (sw_if)
{
bfd_udp_main.echo_source_sw_if_index = sw_if_index;
bfd_udp_main.echo_source_is_set = 1;
return 0;
}
return VNET_API_ERROR_BFD_ENOENT;
}
vnet_api_error_t
bfd_udp_del_echo_source ()
{
bfd_udp_main.echo_source_sw_if_index = ~0;
bfd_udp_main.echo_source_is_set = 0;
return 0;
}
int
bfd_udp_is_echo_available (bfd_transport_e transport)
{
if (!bfd_udp_main.echo_source_is_set)
{
BFD_DBG ("UDP echo source not set - echo not available");
return 0;
}
/*
* for the echo to work, we need a loopback interface with at least one
* address with netmask length at most 31 (ip4) or 127 (ip6) so that we can
* pick an unused address from that subnet
*/
vnet_sw_interface_t *sw_if =
vnet_get_sw_interface_or_null (bfd_udp_main.vnet_main,
bfd_udp_main.echo_source_sw_if_index);
if (sw_if && sw_if->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
{
if (BFD_TRANSPORT_UDP4 == transport)
{
ip4_main_t *im = &ip4_main;
ip_interface_address_t *ia = NULL;
/* *INDENT-OFF* */
foreach_ip_interface_address (&im->lookup_main, ia,
bfd_udp_main.echo_source_sw_if_index,
0 /* honor unnumbered */, ({
if (ia->address_length <= 31)
{
return 1;
}
}));
/* *INDENT-ON* */
}
else if (BFD_TRANSPORT_UDP6 == transport)
{
ip6_main_t *im = &ip6_main;
ip_interface_address_t *ia = NULL;
/* *INDENT-OFF* */
foreach_ip_interface_address (&im->lookup_main, ia,
bfd_udp_main.echo_source_sw_if_index,
0 /* honor unnumbered */, ({
if (ia->address_length <= 127)
{
return 1;
}
}));
/* *INDENT-ON* */
}
}
BFD_DBG ("No usable IP address for UDP echo - echo not available");
return 0;
}
static u16
bfd_udp_bs_idx_to_sport (u32 bs_idx)
{
/* The source port MUST be in the range 49152 through 65535. The same UDP
* source port number MUST be used for all BFD Control packets associated
* with a particular session. The source port number SHOULD be unique among
* all BFD sessions on the system. If more than 16384 BFD sessions are
* simultaneously active, UDP source port numbers MAY be reused on
* multiple sessions, but the number of distinct uses of the same UDP
* source port number SHOULD be minimized.
*/
return 49152 + bs_idx % (65535 - 49152 + 1);
}
int
bfd_udp_get_echo_src_ip4 (ip4_address_t * addr)
{
if (!bfd_udp_main.echo_source_is_set)
{
BFD_ERR ("cannot find ip4 address, echo source not set");
return 0;
}
ip_interface_address_t *ia = NULL;
ip4_main_t *im = &ip4_main;
/* *INDENT-OFF* */
foreach_ip_interface_address (
&im->lookup_main, ia, bfd_udp_main.echo_source_sw_if_index,
0 /* honor unnumbered */, ({
ip4_address_t *x =
ip_interface_address_get_address (&im->lookup_main, ia);
if (ia->address_length <= 31)
{
addr->as_u32 = clib_host_to_net_u32 (x->as_u32);
/*
* flip the last bit to get a different address, might be network,
* we don't care ...
*/
addr->as_u32 ^= 1;
addr->as_u32 = clib_net_to_host_u32 (addr->as_u32);
return 1;
}
}));
/* *INDENT-ON* */
BFD_ERR ("cannot find ip4 address, no usable address found");
return 0;
}
int
bfd_udp_get_echo_src_ip6 (ip6_address_t * addr)
{
if (!bfd_udp_main.echo_source_is_set)
{
BFD_ERR ("cannot find ip6 address, echo source not set");
return 0;
}
ip_interface_address_t *ia = NULL;
ip6_main_t *im = &ip6_main;
/* *INDENT-OFF* */
foreach_ip_interface_address (
&im->lookup_main, ia, bfd_udp_main.echo_source_sw_if_index,
0 /* honor unnumbered */, ({
ip6_address_t *x =
ip_interface_address_get_address (&im->lookup_main, ia);
if (ia->address_length <= 127)
{
*addr = *x;
addr->as_u8[15] ^= 1; /* flip the last bit of the address */
return 1;
}
}));
/* *INDENT-ON* */
BFD_ERR ("cannot find ip6 address, no usable address found");
return 0;
}
void
bfd_udp_get_echo_source (int *is_set, u32 * sw_if_index,
int *have_usable_ip4, ip4_address_t * ip4,
int *have_usable_ip6, ip6_address_t * ip6)
{
if (bfd_udp_main.echo_source_is_set)
{
*is_set = 1;
*sw_if_index = bfd_udp_main.echo_source_sw_if_index;
*have_usable_ip4 = bfd_udp_get_echo_src_ip4 (ip4);
*have_usable_ip6 = bfd_udp_get_echo_src_ip6 (ip6);
}
else
{
*is_set = 0;
}
}
int
bfd_add_udp4_transport (vlib_main_t * vm, u32 bi, const bfd_session_t * bs,
int is_echo)
{
const bfd_udp_session_t *bus = &bs->udp;
const bfd_udp_key_t *key = &bus->key;
vlib_buffer_t *b = vlib_get_buffer (vm, bi);
b->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
vnet_buffer (b)->ip.adj_index[VLIB_RX] = bus->adj_index;
vnet_buffer (b)->ip.adj_index[VLIB_TX] = bus->adj_index;
vnet_buffer (b)->sw_if_index[VLIB_RX] = 0;
vnet_buffer (b)->sw_if_index[VLIB_TX] = ~0;
typedef struct
{
ip4_header_t ip4;
udp_header_t udp;
} ip4_udp_headers;
ip4_udp_headers *headers = NULL;
vlib_buffer_advance (b, -sizeof (*headers));
headers = vlib_buffer_get_current (b);
clib_memset (headers, 0, sizeof (*headers));
headers->ip4.ip_version_and_header_length = 0x45;
headers->ip4.ttl = 255;
headers->ip4.protocol = IP_PROTOCOL_UDP;
headers->udp.src_port =
clib_host_to_net_u16 (bfd_udp_bs_idx_to_sport (bs->bs_idx));
if (is_echo)
{
int rv;
if (!(rv = bfd_udp_get_echo_src_ip4 (&headers->ip4.src_address)))
{
return rv;
}
headers->ip4.dst_address.as_u32 = key->local_addr.ip4.as_u32
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#!/usr/bin/env python3
import socket
from socket import inet_pton, inet_ntop
import unittest
from parameterized import parameterized
import scapy.compat
import scapy.layers.inet6 as inet6
from scapy.contrib.mpls import MPLS
from scapy.layers.inet6 import IPv6, ICMPv6ND_NS, ICMPv6ND_RS, \
ICMPv6ND_RA, ICMPv6NDOptMTU, ICMPv6NDOptSrcLLAddr, ICMPv6NDOptPrefixInfo, \
ICMPv6ND_NA, ICMPv6NDOptDstLLAddr, ICMPv6DestUnreach, icmp6types, \
ICMPv6TimeExceeded, ICMPv6EchoRequest, ICMPv6EchoReply, \
IPv6ExtHdrHopByHop, ICMPv6MLReport2, ICMPv6MLDMultAddrRec
from scapy.layers.l2 import Ether, Dot1Q
from scapy.packet import Raw
from scapy.utils6 import in6_getnsma, in6_getnsmac, in6_ptop, in6_islladdr, \
in6_mactoifaceid
from six import moves
from framework import VppTestCase, VppTestRunner
from util import ppp, ip6_normalize, mk_ll_addr
from vpp_papi import VppEnum
from vpp_ip import DpoProto, VppIpPuntPolicer, VppIpPuntRedirect
from vpp_ip_route import VppIpRoute, VppRoutePath, find_route, VppIpMRoute, \
VppMRoutePath, VppMplsIpBind, \
VppMplsRoute, VppMplsTable, VppIpTable, FibPathType, FibPathProto, \
VppIpInterfaceAddress, find_route_in_dump, find_mroute_in_dump, \
VppIp6LinkLocalAddress
from vpp_neighbor import find_nbr, VppNeighbor
from vpp_pg_interface import is_ipv6_misc
from vpp_sub_interface import VppSubInterface, VppDot1QSubint
from vpp_policer import VppPolicer
from ipaddress import IPv6Network, IPv6Address
AF_INET6 = socket.AF_INET6
try:
text_type = unicode
except NameError:
text_type = str
NUM_PKTS = 67
class TestIPv6ND(VppTestCase):
def validate_ra(self, intf, rx, dst_ip=None):
if not dst_ip:
dst_ip = intf.remote_ip6
# unicasted packets must come to the unicast mac
self.assertEqual(rx[Ether].dst, intf.remote_mac)
# and from the router's MAC
self.assertEqual(rx[Ether].src, intf.local_mac)
# the rx'd RA should be addressed to the sender's source
self.assertTrue(rx.haslayer(ICMPv6ND_RA))
self.assertEqual(in6_ptop(rx[IPv6].dst),
in6_ptop(dst_ip))
# and come from the router's link local
self.assertTrue(in6_islladdr(rx[IPv6].src))
self.assertEqual(in6_ptop(rx[IPv6].src),
in6_ptop(mk_ll_addr(intf.local_mac)))
def validate_na(self, intf, rx, dst_ip=None, tgt_ip=None):
if not dst_ip:
dst_ip = intf.remote_ip6
if not tgt_ip:
dst_ip = intf.local_ip6
# unicasted packets must come to the unicast mac
self.assertEqual(rx[Ether].dst, intf.remote_mac)
# and from the router's MAC
self.assertEqual(rx[Ether].src, intf.local_mac)
# the rx'd NA should be addressed to the sender's source
self.assertTrue(rx.haslayer(ICMPv6ND_NA))
self.assertEqual(in6_ptop(rx[IPv6].dst),
in6_ptop(dst_ip))
# and come from the target address
self.assertEqual(
in6_ptop(rx[IPv6].src), in6_ptop(tgt_ip))
# Dest link-layer options should have the router's MAC
dll = rx[ICMPv6NDOptDstLLAddr]
self.assertEqual(dll.lladdr, intf.local_mac)
def validate_ns(self, intf, rx, tgt_ip):
nsma = in6_getnsma(inet_pton(AF_INET6, tgt_ip))
dst_ip = inet_ntop(AF_INET6, nsma)
# NS is broadcast
self.assertEqual(rx[Ether].dst, in6_getnsmac(nsma))
# and from the router's MAC
self.assertEqual(rx[Ether].src, intf.local_mac)
# the rx'd NS should be addressed to an mcast address
# derived from the target address
self.assertEqual(
in6_ptop(rx[IPv6].dst), in6_ptop(dst_ip))
# expect the tgt IP in the NS header
ns = rx[ICMPv6ND_NS]
self.assertEqual(in6_ptop(ns.tgt), in6_ptop(tgt_ip))
# packet is from the router's local address
self.assertEqual(
in6_ptop(rx[IPv6].src), intf.local_ip6)
# Src link-layer options should have the router's MAC
sll = rx[ICMPv6NDOptSrcLLAddr]
self.assertEqual(sll.lladdr, intf.local_mac)
def send_and_expect_ra(self, intf, pkts, remark, dst_ip=None,
filter_out_fn=is_ipv6_misc):
intf.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = intf.get_capture(1, filter_out_fn=filter_out_fn)
self.assertEqual(len(rx), 1)
rx = rx[0]
self.validate_ra(intf, rx, dst_ip)
def send_and_expect_na(self, intf, pkts, remark, dst_ip=None,
tgt_ip=None,
filter_out_fn=is_ipv6_misc):
intf.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = intf.get_capture(1, filter_out_fn=filter_out_fn)
self.assertEqual(len(rx), 1)
rx = rx[0]
self.validate_na(intf, rx, dst_ip, tgt_ip)
def send_and_expect_ns(self, tx_intf, rx_intf, pkts, tgt_ip,
filter_out_fn=is_ipv6_misc):
self.vapi.cli("clear trace")
tx_intf.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = rx_intf.get_capture(1, filter_out_fn=filter_out_fn)
self.assertEqual(len(rx), 1)
rx = rx[0]
self.validate_ns(rx_intf, rx, tgt_ip)
def verify_ip(self, rx, smac, dmac, sip, dip):
ether = rx[Ether]
self.assertEqual(ether.dst, dmac)
self.assertEqual(ether.src, smac)
ip = rx[IPv6]
self.assertEqual(ip.src, sip)
self.assertEqual(ip.dst, dip)
class TestIPv6(TestIPv6ND):
""" IPv6 Test Case """
@classmethod
def force_solo(cls):
return True
@classmethod
def setUpClass(cls):
super(TestIPv6, cls).setUpClass()
@classmethod
def tearDownClass(cls):
super(TestIPv6, cls).tearDownClass()
def setUp(self):
"""
Perform test setup before test case.
**Config:**
- create 3 pg interfaces
- untagged pg0 interface
- Dot1Q subinterface on pg1
- Dot1AD subinterface on pg2
- setup interfaces:
- put it into UP state
- set IPv6 addresses
- resolve neighbor address using NDP
- configure 200 fib entries
:ivar list interfaces: pg interfaces and subinterfaces.
:ivar dict flows: IPv4 packet flows in test.
*TODO:* Create AD sub interface
"""
super(TestIPv6, self).setUp()
# create 3 pg interfaces
self.create_pg_interfaces(range(3))
# create 2 subinterfaces for p1 and pg2
self.sub_interfaces = [
VppDot1QSubint(self, self.pg1, 100),
VppDot1QSubint(self, self.pg2, 200)
# TODO: VppDot1ADSubint(self, self.pg2, 200, 300, 400)
]
# packet flows mapping pg0 -> pg1.sub, pg2.sub, etc.
self.flows = dict()
self.flows[self.pg0] = [self.pg1.sub_if, self.pg2.sub_if]
self.flows[self.pg1.sub_if] = [self.pg0, self.pg2.sub_if]
self.flows[self.pg2.sub_if] = [self.pg0, self.pg1.sub_if]
# packet sizes
self.pg_if_packet_sizes = [64, 1500, 9020]
self.interfaces = list(self.pg_interfaces)
self.interfaces.extend(self.sub_interfaces)
# setup all interfaces
for i in self.interfaces:
i.admin_up()
i.config_ip6()
i.resolve_ndp()
def tearDown(self):
"""Run standard test teardown and log ``show ip6 neighbors``."""
for i in self.interfaces:
i.unconfig_ip6()
i.admin_down()
for i in self.sub_interfaces:
i.remove_vpp_config()
super(TestIPv6, self).tearDown()
if not self.vpp_dead:
self.logger.info(self.vapi.cli("show ip6 neighbors"))
# info(self.vapi.cli("show ip6 fib")) # many entries
def modify_packet(self, src_if, packet_size, pkt):
"""Add load, set destination IP and extend packet to required packet
size for defined interface.
:param VppInterface src_if: Interface to create packet for.
:param int packet_size: Required packet size.
:param Scapy pkt: Packet to be modified.
"""
dst_if_idx = int(packet_size / 10 % 2)
dst_if = self.flows[src_if][dst_if_idx]
info = self.create_packet_info(src_if, dst_if)
payload = self.info_to_payload(info)
p = pkt / Raw(payload)
p[IPv6].dst = dst_if.remote_ip6
info.data = p.copy()
if isinstance(src_if, VppSubInterface):
p = src_if.add_dot1_layer(p)
self.extend_packet(p, packet_size)
return p
def create_stream(self, src_if):
"""Create input packet stream for defined interface.
:param VppInterface src_if: Interface to create packet stream for.
"""
hdr_ext = 4 if isinstance(src_if, VppSubInterface) else 0
pkt_tmpl = (Ether(dst=src_if.local_mac, src=src_if.remote_mac) /
IPv6(src=src_if.remote_ip6) /
inet6.UDP(sport=1234, dport=1234))
pkts = [self.modify_packet(src_if, i, pkt_tmpl)
for i in moves.range(self.pg_if_packet_sizes[0],
self.pg_if_packet_sizes[1], 10)]
pkts_b = [self.modify_packet(src_if, i, pkt_tmpl)
for i in moves.range(self.pg_if_packet_sizes[1] + hdr_ext,
self.pg_if_packet_sizes[2] + hdr_ext,
50)]
pkts.extend(pkts_b)
return pkts
def verify_capture(self, dst_if, capture):
"""Verify captured input packet stream for defined interface.
:param VppInterface dst_if: Interface to verify captured packet stream
for.
:param list capture: Captured packet stream.
"""
self.logger.info("Verifying capture on interface %s" % dst_if.name)
last_info = dict()
for i in self.interfaces:
last_info[i.sw_if_index] = None
is_sub_if = False
dst_sw_if_index = dst_if.sw_if_index
if hasattr(dst_if, 'parent'):
is_sub_if = True
for packet in capture:
if is_sub_if:
# Check VLAN tags and Ethernet header
packet = dst_if.remove_dot1_layer(packet)
self.assertTrue(Dot1Q not in packet)
try:
ip = packet[IPv6]
udp = packet[inet6.UDP]
payload_info = self.payload_to_info(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)" %
(dst_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[IPv6].src)
self.assertEqual(
ip.dst, saved_packet[IPv6].dst)
self.assertEqual(
udp.sport, saved_packet[inet6.UDP].sport)
self.assertEqual(
udp.dport, saved_packet[inet6.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.sw_if_index, dst_sw_if_index, last_info[i.sw_if_index])
self.assertTrue(remaining_packet is None,
"Interface %s: Packet expected from interface %s "
"didn't arrive" % (dst_if.name, i.name))
def test_next_header_anomaly(self):
""" IPv6 next header anomaly test
Test scenario:
- ipv6 next header field = Fragment Header (44)
- next header is ICMPv6 Echo Request
- wait for reassembly
"""
pkt = (Ether(src=self.pg0.local_mac, dst=self.pg0.remote_mac) /
IPv6(src=self.pg0.remote_ip6, dst=self.pg0.local_ip6, nh=44) /
ICMPv6EchoRequest())
self.pg0.add_stream(pkt)
self.pg_start()
# wait for reassembly
self.sleep(10)
def test_fib(self):
""" IPv6 FIB test
Test scenario:
- Create IPv6 stream for pg0 interface
- Create IPv6 tagged streams for pg1's and pg2's subinterface.
- Send and verify received packets on each interface.
"""
pkts = self.create_stream(self.pg0)
self.pg0.add_stream(pkts)
for i in self.sub_interfaces:
pkts = self.create_stream(i)
i.parent.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
pkts = self.pg0.get_capture()
self.verify_capture(self.pg0, pkts)
for i in self.sub_interfaces:
pkts = i.parent.get_capture()
self.verify_capture(i, pkts)
def test_ns(self):
""" IPv6 Neighbour Solicitation Exceptions
Test scenario:
- Send an NS Sourced from an address not covered by the link sub-net
- Send an NS to an mcast address the router has not joined
- Send NS for a target address the router does not onn.
"""
#
# An NS from a non link source address
#
nsma = in6_getnsma(inet_pton(AF_INET6, self.pg0.local_ip6))
d = inet_ntop(AF_INET6, nsma)
p = (Ether(dst=in6_getnsmac(nsma)) /
IPv6(dst=d, src="2002::2") /
ICMPv6ND_NS(tgt=self.pg0.local_ip6) /
ICMPv6NDOptSrcLLAddr(
lladdr=self.pg0.remote_mac))
pkts = [p]
self.send_and_assert_no_replies(
self.pg0, pkts,
"No response to NS source by address not on sub-net")
#
# An NS for sent to a solicited mcast group the router is
# not a member of FAILS
#
if 0:
nsma = in6_getnsma(inet_pton(AF_INET6, "fd::ffff"))
d = inet_ntop(AF_INET6, nsma)
p = (Ether(dst=in6_getnsmac(nsma)) /
IPv6(dst=d, src=self.pg0.remote_ip6) /
ICMPv6ND_NS(tgt=self.pg0.local_ip6) /
ICMPv6NDOptSrcLLAddr(
lladdr=self.pg0.remote_mac))
pkts = [p]
self.send_and_assert_no_replies(
self.pg0, pkts,
"No response to NS sent to unjoined mcast address")
#
# An NS whose target address is one the router does not own
#
nsma = in6_getnsma(inet_pton(AF_INET6, self.pg0.local_ip6))
d = inet_ntop(AF_INET6, nsma)
p = (Ether(dst=in6_getnsmac(nsma)) /
IPv6(dst=d, src=self.pg0.remote_ip6) /
ICMPv6ND_NS(tgt="fd::ffff") /
ICMPv6NDOptSrcLLAddr(
lladdr=self.pg0.remote_mac))
pkts = [p]
self.send_and_assert_no_replies(self.pg0, pkts,
"No response to NS for unknown target")
#
# A neighbor entry that has no associated FIB-entry
#
self.pg0.generate_remote_hosts(4)
nd_entry = VppNeighbor(self,
self.pg0.sw_if_index,
self.pg0.remote_hosts[2].mac,
self.pg0.remote_hosts[2].ip6,
is_no_fib_entry=1)
nd_entry.add_vpp_config()
#
# check we have the neighbor, but no route
#
self.assertTrue(find_nbr(self,
self.pg0.sw_if_index,
self.pg0._remote_hosts[2].ip6))
self.assertFalse(find_route(self,
self.pg0._remote_hosts[2].ip6,
128))
#
# send an NS from a link local address to the interface's global
# address
#
p = (Ether(dst=in6_getnsmac(nsma), src=self.pg0.remote_mac) /
IPv6(
dst=d, src=self.pg0._remote_hosts[2].ip6_ll) /
ICMPv6ND_NS(tgt=self.pg0.local_ip6) /
ICMPv6NDOptSrcLLAddr(
lladdr=self.pg0.remote_mac))
self.send_and_expect_na(self.pg0, p,
"NS from link-local",
dst_ip=self.pg0._remote_hosts[2].ip6_ll,
tgt_ip=self.pg0.local_ip6)
#
# we should have learned an ND entry for the peer's link-local
# but not inserted a route to it in the FIB
#
self.assertTrue(find_nbr(self,
self.pg0.sw_if_index,
self.pg0._remote_hosts[2].ip6_ll))
self.assertFalse(find_route(self,
self.pg0._remote_hosts[2].ip6_ll,
128))
#
# An NS to the router's own Link-local
#
p = (Ether(dst=in6_getnsmac(nsma), src=self.pg0.remote_mac) /
IPv6(
dst=d, src=self.pg0._remote_hosts[3].ip6_ll) /
ICMPv6ND_NS(tgt=self.pg0.local_ip6_ll) /
ICMPv6NDOptSrcLLAddr(
lladdr=self.pg0.remote_mac))
self.send_and_expect_na(self.pg0, p,
"NS to/from link-local",
dst_ip=self.pg0._remote_hosts[3].ip6_ll,
tgt_ip=self.pg0.local_ip6_ll)
#
# we should have learned an ND entry for the peer's link-local
# but not inserted a route to it in the FIB
#
self.assertTrue(find_nbr(self,
self.pg0.sw_if_index,
self.pg0._remote_hosts[3].ip6_ll))
self.assertFalse(find_route(self,
self.pg0._remote_hosts[3].ip6_ll,
128))
def test_ns_duplicates(self):
""" ND Duplicates"""
#
# Generate some hosts on the LAN
#
self.pg1.generate_remote_hosts(3)
#
# Add host 1 on pg1 and pg2
#
ns_pg1 = VppNeighbor(self,
self.pg1.sw_if_index,
self.pg1.remote_hosts[1].mac,
self.pg1.remote_hosts[1].ip6)
ns_pg1.add_vpp_config()
ns_pg2 = VppNeighbor(self,
self.pg2.sw_if_index,
self.pg2.remote_mac,
self.pg1.remote_hosts[1].ip6)
ns_pg2.add_vpp_config()
#
# IP packet destined for pg1 remote host arrives on pg1 again.
#
p = (Ether(dst=self.pg0.local_mac,
src=self.pg0.remote_mac) /
IPv6(src=self.pg0.remote_ip6,
dst=self.pg1.remote_hosts[1].ip6) /
inet6.UDP(sport=1234, dport=1234) /
Raw())
self.pg0.add_stream(p)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx1 = self.pg1.get_capture(1)
self.verify_ip(rx1[0],
self.pg1.local_mac,
self.pg1.remote_hosts[1].mac,
self.pg0.remote_ip6,
self.pg1.remote_hosts[1].ip6)
#
# remove the duplicate on pg1
# packet stream should generate NSs out of pg1
#
ns_pg1.remove_vpp_config()
self.send_and_expect_ns(self.pg0, self.pg1,
p, self.pg1.remote_hosts[1].ip6)
#
# Add it back
#
ns_pg1.add_vpp_config()
self.pg0.add_stream(p)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx1 = self.pg1.get_capture(1)
self.verify_ip(rx1[0],
self.pg1.local_mac,
self.pg1.remote_hosts[1].mac,
self.pg0.remote_ip6,
self.pg1.remote_hosts[1].ip6)
def validate_ra(self, intf, rx, dst_ip=None, src_ip=None,
mtu=9000, pi_opt=None):
if not dst_ip:
dst_ip = intf.remote_ip6
if not src_ip:
src_ip = mk_ll_addr(intf.local_mac)
# unicasted packets must come to the unicast mac
self.assertEqual(rx[Ether].dst, intf.remote_mac)
# and from the router's MAC
self.assertEqual(rx[Ether].src, intf.local_mac)
# the rx'd RA should be addressed to the sender's source
self.assertTrue(rx.haslayer(ICMPv6ND_RA))
self.assertEqual(in6_ptop(rx[IPv6].dst),
in6_ptop(dst_ip))
# and come from the router's link local
self.assertTrue(in6_islladdr(rx[IPv6].src))
self.assertEqual(in6_ptop(rx[IPv6].src), in6_ptop(src_ip))
# it should contain the links MTU
ra = rx[ICMPv6ND_RA]
self.assertEqual(ra[ICMPv6NDOptMTU].mtu, mtu)
# it should contain the source's link layer address option
sll = ra[ICMPv6NDOptSrcLLAddr]
self.assertEqual(sll.lladdr, intf.local_mac)
if not pi_opt:
# the RA should not contain prefix information
self.assertFalse(ra.haslayer(
ICMPv6NDOptPrefixInfo))
else:
raos = rx.getlayer(ICMPv6NDOptPrefixInfo, 1)
# the options are nested in the scapy packet in way that i cannot
# decipher how to decode. this 1st layer of option always returns
# nested classes, so a direct obj1=obj2 comparison always fails.
# however, the getlayer(.., 2) does give one instance.
# so we cheat here and construct a new opt instance for comparison
rd = ICMPv6NDOptPrefixInfo(
prefixlen=raos.prefixlen,
prefix=raos.prefix,
L=raos.L,
A=raos.A)
if type(pi_opt) is list:
for ii in range(len(pi_opt)):
self.assertEqual(pi_opt[ii], rd)
rd = rx.getlayer(
ICMPv6NDOptPrefixInfo, ii + 2)
else:
self.assertEqual(pi_opt, raos, 'Expected: %s, received: %s'
% (pi_opt.show(dump=True),
raos.show(dump=True)))
def send_and_expect_ra(self, intf, pkts, remark, dst_ip=None,
filter_out_fn=is_ipv6_misc,
opt=None,
src_ip=None):
self.vapi.cli("clear trace")
intf.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = intf.get_capture(1, filter_out_fn=filter_out_fn)
self.assertEqual(len(rx), 1)
rx = rx[0]
self.validate_ra(intf, rx, dst_ip, src_ip=src_ip, pi_opt=opt)
def test_rs(self):
""" IPv6 Router Solicitation Exceptions
Test scenario:
"""
#
# Before we begin change the IPv6 RA responses to use the unicast
# address - that way we will not confuse them with the periodic
# RAs which go to the mcast address
# Sit and wait for the first periodic RA.
#
# TODO
#
self.pg0.ip6_ra_config(send_unicast=1)
#
# An RS from a link source address
# - expect an RA in return
#
p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
IPv6(dst=self.pg0.local_ip6, src=self.pg0.remote_ip6) /
ICMPv6ND_RS())
pkts = [p]
self.send_and_expect_ra(self.pg0, pkts, "Genuine RS")
#
# For the next RS sent the RA should be rate limited
#
self.send_and_assert_no_replies(self.pg0, pkts, "RA rate limited")
#
# When we reconfigure the IPv6 RA config,
# we reset the RA rate limiting,
# so we need to do this before each test below so as not to drop
# packets for rate limiting reasons. Test this works here.
#
self.pg0.ip6_ra_config(send_unicast=1)
self.send_and_expect_ra(self.pg0, pkts, "Rate limit reset RS")
#
# An RS sent from a non-link local source
#
self.pg0.ip6_ra_config(send_unicast=1)
p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
IPv6(dst=self.pg0.local_ip6,
src="2002::ffff") /
ICMPv6ND_RS())
pkts = [p]
self.send_and_assert_no_replies(self.pg0, pkts,
"RS from non-link source")
#
# Source an RS from a link local address
#
self.pg0.ip6_ra_config(send_unicast=1)
ll = mk_ll_addr(self.pg0.remote_mac)
p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
IPv6(dst=self.pg0.local_ip6, src=ll) /
ICMPv6ND_RS())
pkts = [p]
self.send_and_expect_ra(self.pg0, pkts,
"RS sourced from link-local",
dst_ip=ll)
#
# Send the RS multicast
#
self.pg0.ip6_ra_config(send_unicast=1)
dmac = in6_getnsmac(inet_pton(AF_INET6, "ff02::2"))
ll = mk_ll_addr(self.pg0.remote_mac)
p = (Ether(dst=dmac, src=self.pg0.remote_mac) /
IPv6(dst="ff02::2", src=ll) /
ICMPv6ND_RS())
pkts = [p]
self.send_and_expect_ra(self.pg0, pkts,
"RS sourced from link-local",
dst_ip=ll)
#
# Source from the unspecified address ::. This happens when the RS
# is sent before the host has a configured address/sub-net,
# i.e. auto-config. Since the sender has no IP address, the reply
# comes back mcast - so the capture needs to not filter this.
# If we happen to pick up the periodic RA at this point then so be it,
# it's not an error.
#
self.pg0.ip6_ra_config(send_unicast=1, suppress=1)
p = (Ether(dst=dmac, src=self.pg0.remote_mac) /
IPv6(dst="ff02::2", src="::") /
ICMPv6ND_RS())
pkts = [p]
self.send_and_expect_ra(self.pg0, pkts,
"RS sourced from unspecified",
dst_ip="ff02::1",
filter_out_fn=None)
#
# Configure The RA to announce the links prefix
#
self.pg0.ip6_ra_prefix('%s/%s' % (self.pg0.local_ip6,
self.pg0.local_ip6_prefix_len))
#
# RAs should now contain the prefix information option
#
opt = ICMPv6NDOptPrefixInfo(
prefixlen=self.pg0.local_ip6_prefix_len,
prefix=self.pg0.local_ip6,
L=1,
A=1)
self.pg0.ip6_ra_config(send_unicast=1)
ll = mk_ll_addr(self.pg0.remote_mac)
p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
IPv6(dst=self.pg0.local_ip6, src=ll) /
ICMPv6ND_RS())
self.send_and_expect_ra(self.pg0, p,
"RA with prefix-info",
dst_ip=ll,
opt=opt)
#
# Change the prefix info to not off-link
# L-flag is clear
#
self.pg0.ip6_ra_prefix('%s/%s' % (self.pg0.local_ip6,
self.pg0.local_ip6_prefix_len),
off_link=1)
opt = ICMPv6NDOptPrefixInfo(
prefixlen=self.pg0.local_ip6_prefix_len,
prefix=self.pg0.local_ip6,
L=0,
A=1)
self.pg0.ip6_ra_config(send_unicast=1)
self.send_and_expect_ra(self.pg0, p,
"RA with Prefix info with L-flag=0",
dst_ip=ll,
opt=opt)
#
# Change the prefix info to not off-link, no-autoconfig
# L and A flag are clear in the advert
#
self.pg0.ip6_ra_prefix('%s/%s' % (self.pg0.local_ip6,
self.pg0.local_ip6_prefix_len),
off_link=1,
no_autoconfig=1)
opt = ICMPv6NDOptPrefixInfo(
prefixlen=self.pg0.local_ip6_prefix_len,
prefix=self.pg0.local_ip6,
L=0,
A=0)
self.pg0.ip6_ra_config(send_unicast=1)
self.send_and_expect_ra(self.pg0, p,
"RA with Prefix info with A & L-flag=0",
dst_ip=ll,
opt=opt)
#
# Change the flag settings back to the defaults
# L and A flag are set in the advert
#
self.pg0.ip6_ra_prefix('%s/%s' % (self.pg0.local_ip6,
self.pg0.local_ip6_prefix_len))
opt = ICMPv6NDOptPrefixInfo(
prefixlen=self.pg0.local_ip6_prefix_len,
prefix=self.pg0.local_ip6,
L=1,
A=1)
self.pg0.ip6_ra_config(send_unicast=1)
self.send_and_expect_ra(self.pg0, p,
"RA with Prefix info",
dst_ip=ll,
opt=opt)
#
# Change the prefix info to not off-link, no-autoconfig
# L and A flag are clear in the advert
#
self.pg0.ip6_ra_prefix('%s/%s' % (self.pg0.local_ip6,
self.pg0.local_ip6_prefix_len),
off_link=1,
no_autoconfig=1)
opt = ICMPv6NDOptPrefixInfo(
prefixlen=self.pg0.local_ip6_prefix_len,
prefix=self.pg0.local_ip6,
L=0,
A=0)
self.pg0.ip6_ra_config(send_unicast=1)
self.send_and_expect_ra(self.pg0, p,
"RA with Prefix info with A & L-flag=0",
dst_ip=ll,
opt=opt)
#
# Use the reset to defaults option to revert to defaults
# L and A flag are clear in the advert
#
self.pg0.ip6_ra_prefix('%s/%s' % (self.pg0.local_ip6,
self.pg0.local_ip6_prefix_len),
use_default=1)
opt = ICMPv6NDOptPrefixInfo(
prefixlen=self.pg0.local_ip6_prefix_len,
prefix=self.pg0.local_ip6,
L=1,
A=1)
self.pg0.ip6_ra_config(send_unicast=1)
self.send_and_expect_ra(self.pg0, p,
"RA with Prefix reverted to defaults",
dst_ip=ll,
opt=opt)
#
# Advertise Another prefix. With no L-flag/A-flag
#
self.pg0.ip6_ra_prefix('%s/%s' % (self.pg1.local_ip6,
self.pg1.local_ip6_prefix_len),
off_link=1,
no_autoconfig=1)
opt = [ICMPv6NDOptPrefixInfo(
prefixlen=self.pg0.local_ip6_prefix_len,
prefix=self.pg0.local_ip6,
L=1,
A=1),
ICMPv6NDOptPrefixInfo(
prefixlen=self.pg1.local_ip6_prefix_len,
prefix=self.pg1.local_ip6,
L=0,
A=0)]
self.pg0.ip6_ra_config(send_unicast=1)
ll = mk_ll_addr(self.pg0.remote_mac)
p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
IPv6(dst=self.pg0.local_ip6, src=ll) /
ICMPv6ND_RS())
self.send_and_expect_ra(self.pg0, p,
"RA with multiple Prefix infos",
dst_ip=ll,
opt=opt)
#
# Remove the first prefix-info - expect the second is still in the
# advert
#
self.pg0.ip6_ra_prefix('%s/%s' % (self.pg0.local_ip6,
self.pg0.local_ip6_prefix_len),
is_no=1)
opt = ICMPv6NDOptPrefixInfo(
prefixlen=self.pg1.local_ip6_prefix_len,
prefix=self.pg1.local_ip6,
L=0,
A=0)
self.pg0.ip6_ra_config(send_unicast=1)
self.send_and_expect_ra(self.pg0, p,
"RA with Prefix reverted to defaults",
dst_ip=ll,
opt=opt)
#
# Remove the second prefix-info - expect no prefix-info in the adverts
#
self.pg0.ip6_ra_prefix('%s/%s' % (self.pg1.local_ip6,
self.pg1.local_ip6_prefix_len),
is_no=1)
#
# change the link's link local, so we know that works too.
#
self.vapi.sw_interface_ip6_set_link_local_address(
sw_if_index=self.pg0.sw_if_index,
ip="fe80::88")
self.pg0.ip6_ra_config(send_unicast=1)
self.send_and_expect_ra(self.pg0, p,
"RA with Prefix reverted to defaults",
dst_ip=ll,
src_ip="fe80::88")
#
# Reset the periodic advertisements back to default values
#
self.pg0.ip6_ra_config(no=1, suppress=1, send_unicast=0)
def test_mld(self):
""" MLD Report """
#
# test one MLD is sent after applying an IPv6 Address on an interface
#
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
subitf = VppDot1QSubint(self, self.pg1, 99)
subitf.admin_up()
subitf.config_ip6()
rxs = self.pg1._get_capture(timeout=4, filter_out_fn=None)
#
# hunt for the MLD on vlan 99
#
for rx in rxs:
# make sure ipv6 packets with hop by hop options have
# correct checksums
self.assert_packet_checksums_valid(rx)
if rx.haslayer(IPv6ExtHdrHopByHop) and \
rx.haslayer(Dot1Q) and \
rx[Dot1Q].vlan == 99:
mld = rx[ICMPv6MLReport2]
self.assertEqual(mld.records_number, 4)
class TestIPv6RouteLookup(VppTestCase):
""" IPv6 Route Lookup Test Case """
routes = []
def route_lookup(self, prefix, exact):
return self.vapi.api(self.vapi.papi.ip_route_lookup,
{
'table_id': 0,
'exact': exact,
'prefix': prefix,
})
@classmethod
def setUpClass(cls):
super(TestIPv6RouteLookup, cls).setUpClass()
@classmethod
def tearDownClass(cls):
super(TestIPv6RouteLookup, cls).tearDownClass()
def setUp(self):
super(TestIPv6RouteLookup, self).setUp()
drop_nh = VppRoutePath("::1", 0xffffffff,
type=FibPathType.FIB_PATH_TYPE_DROP)
# Add 3 routes
r = VppIpRoute(self, "2001:1111::", 32, [drop_nh])
r.add_vpp_config()
self.routes.append(r)
r = VppIpRoute(self, "2001:1111:2222::", 48, [drop_nh])
r.add_vpp_config()
self.routes.append(r)
r = VppIpRoute(self, "2001:1111:2222::1", 128, [drop_nh])
r.add_vpp_config()
self.routes.append(r)
def tearDown(self):
# Remove the routes we added
for r in self.routes:
r.remove_vpp_config()
super(TestIPv6RouteLookup, self).tearDown()
def test_exact_match(self):
# Verify we find the host route
prefix = "2001:1111:2222::1/128"
result = self.route_lookup(prefix, True)
assert (prefix == str(result.route.prefix))
# Verify we find a middle prefix route
prefix = "2001:1111:2222::/48"
result = self.route_lookup(prefix, True)
assert (prefix == str(result.route.prefix))
# Verify we do not find an available LPM.
with self.vapi.assert_negative_api_retval():
self.route_lookup("2001::2/128", True)
def test_longest_prefix_match(self):
# verify we find lpm
lpm_prefix = "2001:1111:2222::/48"
result = self.route_lookup("2001:1111:2222::2/128", False)
assert (lpm_prefix == str(result.route.prefix))
# Verify we find the exact when not requested
result = self.route_lookup(lpm_prefix, False)
assert (lpm_prefix == str(result.route.prefix))
# Can't seem to delete the default route so no negative LPM test.
class TestIPv6IfAddrRoute(VppTestCase):
""" IPv6 Interface Addr Route Test Case """
@classmethod
def setUpClass(cls):
super(TestIPv6IfAddrRoute, cls).setUpClass()
@classmethod
def tearDownClass(cls):
super(TestIPv6IfAddrRoute, cls).tearDownClass()
def setUp(self):
super(TestIPv6IfAddrRoute, self).setUp()
# create 1 pg interface
self.create_pg_interfaces(range(1))
for i in self.pg_interfaces:
i.admin_up()
i.config_ip6()
i.resolve_ndp()
def tearDown(self):
super(TestIPv6IfAddrRoute, self).tearDown()
for i in self.pg_interfaces:
i.unconfig_ip6()
i.admin_down()
def test_ipv6_ifaddrs_same_prefix(self):
""" IPv6 Interface Addresses Same Prefix test
Test scenario:
- Verify no route in FIB for prefix 2001:10::/64
- Configure IPv4 address 2001:10::10/64 on an interface
- Verify route in FIB for prefix 2001:10::/64
- Configure IPv4 address 2001:10::20/64 on an interface
- Delete 2001:10::10/64 from interface
- Verify route in FIB for prefix 2001:10::/64
- Delete 2001:10::20/64 from interface
- Verify no route in FIB for prefix 2001:10::/64
"""
addr1 = "2001:10::10"
addr2 = "2001:10::20"
if_addr1 = VppIpInterfaceAddress(self, self.pg0, addr1, 64)
if_addr2 = VppIpInterfaceAddress(self, self.pg0, addr2, 64)
self.assertFalse(if_addr1.query_vpp_config())
self.assertFalse(find_route(self, addr1, 128))
self.assertFalse(find_route(self, addr2, 128))
# configure first address, verify route present
if_addr1.add_vpp_config()
self.assertTrue(if_addr1.query_vpp_config())
self.assertTrue(find_route(self, addr1, 128))
self.assertFalse(find_route(self, addr2, 128))
# configure second address, delete first, verify route not removed
if_addr2.add_vpp_config()
if_addr1.remove_vpp_config()
self.assertFalse(if_addr1.query_vpp_config())
self.assertTrue(if_addr2.query_vpp_config())
self.assertFalse(find_route(self, addr1, 128))
self.assertTrue(find_route(self, addr2, 128))
# delete second address, verify route removed
if_addr2.remove_vpp_config()
self.assertFalse(if_addr1.query_vpp_config())
self.assertFalse(find_route(self, addr1, 128))
self.assertFalse(find_route(self, addr2, 128))
def test_ipv6_ifaddr_del(self):
""" Delete an interface address that does not exist """
loopbacks = self.create_loopback_interfaces(1)
lo = self.lo_interfaces[0]
lo.config_ip6()
lo.admin_up()
#
# try and remove pg0's subnet from lo
#
with self.vapi.assert_negative_api_retval():
self.vapi.sw_interface_add_del_address(
sw_if_index=lo.sw_if_index,
prefix=self.pg0.local_ip6_prefix,
is_add=0)
class TestICMPv6Echo(VppTestCase):
""" ICMPv6 Echo Test Case """
@classmethod
def setUpClass(cls):
super(TestICMPv6Echo, cls).setUpClass()
@classmethod
def tearDownClass(cls):
super(TestICMPv6Echo, cls).tearDownClass()
def setUp(self):
super(TestICMPv6Echo, self).setUp()
# create 1 pg interface
self.create_pg_interfaces(range(1))
for i in self.pg_interfaces:
i.admin_up()
i.config_ip6()
i.resolve_ndp()
def tearDown(self):
super(TestICMPv6Echo, self).tearDown()
for i in self.pg_interfaces:
i.unconfig_ip6()
i.admin_down()
def test_icmpv6_echo(self):
""" VPP replies to ICMPv6 Echo Request
Test scenario:
- Receive ICMPv6 Echo Request message on pg0 interface.
- Check outgoing ICMPv6 Echo Reply message on pg0 interface.
"""
icmpv6_id = 0xb
icmpv6_seq = 5
icmpv6_data = b'\x0a' * 18
p_echo_request = (Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac) /
IPv6(src=self.pg0.remote_ip6,
dst=self.pg0.local_ip6) /
ICMPv6EchoRequest(
id=icmpv6_id,
seq=icmpv6_seq,
data=icmpv6_data))
self.pg0.add_stream(p_echo_request)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg0.get_capture(1)
rx = rx[0]
ether = rx[Ether]
ipv6 = rx[IPv6]
icmpv6 = rx[ICMPv6EchoReply]
self.assertEqual(ether.src, self.pg0.local_mac)
self.assertEqual(ether.dst, self.pg0.remote_mac)
self.assertEqual(ipv6.src, self.pg0.local_ip6)
self.assertEqual(ipv6.dst, self.pg0.remote_ip6)
self.assertEqual(
icmp6types[icmpv6.type], "Echo Reply")
self.assertEqual(icmpv6.id, icmpv6_id)
self.assertEqual(icmpv6.seq, icmpv6_seq)
self.assertEqual(icmpv6.data, icmpv6_data)
class TestIPv6RD(TestIPv6ND):
""" IPv6 Router Discovery Test Case """
@classmethod
def setUpClass(cls):
super(TestIPv6RD, cls).setUpClass()
@classmethod
def tearDownClass(cls):
super(TestIPv6RD, cls).tearDownClass()
def setUp(self):
super(TestIPv6RD, self).setUp()
# create 2 pg interfaces
self.create_pg_interfaces(range(2))
self.interfaces = list(self.pg_interfaces)
# setup all interfaces
for i in self.interfaces:
i.admin_up()
i.config_ip6()
def tearDown(self):
for i in self.interfaces:
i.unconfig_ip6()
i.admin_down()
super(TestIPv6RD, self).tearDown()
def test_rd_send_router_solicitation(self):
""" Verify router solicitation packets """
count = 2
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
self.vapi.ip6nd_send_router_solicitation(self.pg1.sw_if_index,
mrc=count)
rx_list = self.pg1.get_capture(count, timeout=3)
self.assertEqual(len(rx_list), count)
for packet in rx_list:
self.assertEqual(packet.haslayer(IPv6), 1)
self.assertEqual(packet[IPv6].haslayer(
ICMPv6ND_RS), 1)
dst = ip6_normalize(packet[IPv6].dst)
dst2 = ip6_normalize("ff02::2")
self.assert_equal(dst, dst2)
src = ip6_normalize(packet[IPv6].src)
src2 = ip6_normalize(self.pg1.local_ip6_ll)
self.assert_equal(src, src2)
self.assertTrue(
bool(packet[ICMPv6ND_RS].haslayer(
ICMPv6NDOptSrcLLAddr)))
self.assert_equal(
packet[ICMPv6NDOptSrcLLAddr].lladdr,
self.pg1.local_mac)
def verify_prefix_info(self, reported_prefix, prefix_option):
prefix = IPv6Network(
text_type(prefix_option.getfieldval("prefix") +
"/" +
text_type(prefix_option.getfieldval("prefixlen"))),
strict=False)
self.assert_equal(reported_prefix.prefix.network_address,
prefix.network_address)
L = prefix_option.getfieldval("L")
A = prefix_option.getfieldval("A")
option_flags = (L << 7) | (A << 6)
self.assert_equal(reported_prefix.flags, option_flags)
self.assert_equal(reported_prefix.valid_time,
prefix_option.getfieldval("validlifetime"))
self.assert_equal(reported_prefix.preferred_time,
prefix_option.getfieldval("preferredlifetime"))
def test_rd_receive_router_advertisement(self):
""" Verify events triggered by received RA packets """
self.vapi.want_ip6_ra_events(enable=1)
prefix_info_1 = ICMPv6NDOptPrefixInfo(
prefix="1::2",
prefixlen=50,
validlifetime=200,
preferredlifetime=500,
L=1,
A=1,
)
prefix_info_2 = ICMPv6NDOptPrefixInfo(
prefix="7::4",
prefixlen=20,
validlifetime=70,
preferredlifetime=1000,
L=1,
A=0,
)
p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
IPv6(dst=self.pg1.local_ip6_ll,
src=mk_ll_addr(self.pg1.remote_mac)) /
ICMPv6ND_RA() /
prefix_info_1 /
prefix_info_2)
self.pg1.add_stream([p])
self.pg_start()
ev = self.vapi.wait_for_event(10, "ip6_ra_event")
self.assert_equal(ev.current_hop_limit, 0)
self.assert_equal(ev.flags, 8)
self.assert_equal(ev.router_lifetime_in_sec, 1800)
self.assert_equal(ev.neighbor_reachable_time_in_msec, 0)
self.assert_equal(
ev.time_in_msec_between_retransmitted_neighbor_solicitations, 0)
self.assert_equal(ev.n_prefixes, 2)
self.verify_prefix_info(ev.prefixes[0], prefix_info_1)
self.verify_prefix_info(ev.prefixes[1], prefix_info_2)
class TestIPv6RDControlPlane(TestIPv6ND):
""" IPv6 Router Discovery Control Plane Test Case """
@classmethod
def setUpClass(cls):
super(TestIPv6RDControlPlane, cls).setUpClass()
@classmethod
def tearDownClass(cls):
super(TestIPv6RDControlPlane, cls).tearDownClass()
def setUp(self):
super(TestIPv6RDControlPlane, self).setUp()
# create 1 pg interface
self.create_pg_interfaces(range(1))
self.interfaces = list(self.pg_interfaces)
# setup all interfaces
for i in self.interfaces:
i.admin_up()
i.config_ip6()
def tearDown(self):
super(TestIPv6RDControlPlane, self).tearDown()
@staticmethod
def create_ra_packet(pg, routerlifetime=None):
src_ip = pg.remote_ip6_ll
dst_ip = pg.local_ip6
if routerlifetime is not None:
ra = ICMPv6ND_RA(routerlifetime=routerlifetime)
else:
ra = ICMPv6ND_RA()
p = (Ether(dst=pg.local_mac, src=pg.remote_mac) /
IPv6(dst=dst_ip, src=src_ip) / ra)
return p
@staticmethod
def get_default_routes(fib):
list = []
for entry in fib:
if entry.route.prefix.prefixlen == 0:
for path in entry.route.paths:
if path.sw_if_index != 0xFFFFFFFF:
defaut_route = {}
defaut_route['sw_if_index'] = path.sw_if_index
defaut_route['next_hop'] = path.nh.address.ip6
list.append(defaut_route)
return list
@staticmethod
def get_interface_addresses(fib, pg):
list = []
for entry in fib:
if entry.route.prefix.prefixlen == 128:
path = entry.route.paths[0]
if path.sw_if_index == pg.sw_if_index:
list.append(str(entry.route.prefix.network_address))
return list
def wait_for_no_default_route(self, n_tries=50, s_time=1):
while (n_tries):
fib = self.vapi.ip_route_dump(0, True)
default_routes = self.get_default_routes(fib)
if 0 == len(default_routes):
return True
n_tries = n_tries - 1
self.sleep(s_time)
return False
def test_all(self):
""" Test handling of SLAAC addresses and default routes """
fib = self.vapi.ip_route_dump(0, True)
default_routes = self.get_default_routes(fib)
initial_addresses = set(self.get_interface_addresses(fib, self.pg0))
self.assertEqual(default_routes, [])
router_address = IPv6Address(text_type(self.pg0.remote_ip6_ll))
self.vapi.ip6_nd_address_autoconfig(self.pg0.sw_if_index, 1, 1)
self.sleep(0.1)
# send RA
packet = (self.create_ra_packet(
self.pg0) / ICMPv6NDOptPrefixInfo(
prefix="1::",
prefixlen=64,
validlifetime=2,
preferredlifetime=2,
L=1,
A=1,
) / ICMPv6NDOptPrefixInfo(
prefix="7::",
prefixlen=20,
validlifetime=1500,
preferredlifetime=1000,
L=1,
A=0,
))
self.pg0.add_stream([packet])
self.pg_start()
self.sleep_on_vpp_time(0.1)
fib = self.vapi.ip_route_dump(0, True)
# check FIB for new address
addresses = set(self.get_interface_addresses(fib, self.pg0))
new_addresses = addresses.difference(initial_addresses)
self.assertEqual(len(new_addresses), 1)
prefix = IPv6Network(text_type("%s/%d" % (list(new_addresses)[0], 20)),
strict=False)
self.assertEqual(prefix, IPv6Network(text_type('1::/20')))
# check FIB for new default route
default_routes = self.get_default_routes(fib)
self.assertEqual(len(default_routes), 1)
dr = default_routes[0]
self.assertEqual(dr['sw_if_index'], self.pg0.sw_if_index)
self.assertEqual(dr['next_hop'], router_address)
# send RA to delete default route
packet = self.create_ra_packet(self.pg0, routerlifetime=0)
self.pg0.add_stream([packet])
self.pg_start()
self.sleep_on_vpp_time(0.1)
# check that default route is deleted
fib = self.vapi.ip_route_dump(0, True)
default_routes = self.get_default_routes(fib)
self.assertEqual(len(default_routes), 0)
self.sleep_on_vpp_time(0.1)
# send RA
packet = self.create_ra_packet(self.pg0)
self.pg0.add_stream([packet])
self.pg_start()
self.sleep_on_vpp_time(0.1)
# check FIB for new default route
fib = self.vapi.ip_route_dump(0, True)
default_routes = self.get_default_routes(fib)
self.assertEqual(len(default_routes), 1)
dr = default_routes[0]
self.assertEqual(dr['sw_if_index'], self.pg0.sw_if_index)
self.assertEqual(dr['next_hop'], router_address)
# send RA, updating router lifetime to 1s
packet = self.create_ra_packet(self.pg0, 1)
self.pg0.add_stream([packet])
self.pg_start()
self.sleep_on_vpp_time(0.1)
# check that default route still exists
fib = self.vapi.ip_route_dump(0, True)
default_routes = self.get_default_routes(fib)
self.assertEqual(len(default_routes), 1)
dr = default_routes[0]
self.assertEqual(dr['sw_if_index'], self.pg0.sw_if_index)
self.assertEqual(dr['next_hop'], router_address)
self.sleep_on_vpp_time(1)
# check that default route is deleted
self.assertTrue(self.wait_for_no_default_route())
# check FIB still contains the SLAAC address
addresses = set(self.get_interface_addresses(fib, self.pg0))
new_addresses = addresses.difference(initial_addresses)
self.assertEqual(len(new_addresses), 1)
prefix = IPv6Network(text_type("%s/%d" % (list(new_addresses)[0], 20)),
strict=False)
self.assertEqual(prefix, IPv6Network(text_type('1::/20')))
self.sleep_on_vpp_time(1)
# check that SLAAC address is deleted
fib = self.vapi.ip_route_dump(0, True)
addresses = set(self.get_interface_addresses(fib, self.pg0))
new_addresses = addresses.difference(initial_addresses)
self.assertEqual(len(new_addresses), 0)
class IPv6NDProxyTest(TestIPv6ND):
""" IPv6 ND ProxyTest Case """
@classmethod
def setUpClass(cls):
super(IPv6NDProxyTest, cls).setUpClass()
@classmethod
def tearDownClass(cls):
super(IPv6NDProxyTest, cls).tearDownClass()
def setUp(self):
super(IPv6NDProxyTest, self).setUp()
# create 3 pg interfaces
self.create_pg_interfaces(range(3))
# pg0 is the master interface, with the configured subnet
self.pg0.admin_up()
self.pg0.config_ip6()
self.pg0.resolve_ndp()
self.pg1.ip6_enable()
self.pg2.ip6_enable()
def tearDown(self):
super(IPv6NDProxyTest, self).tearDown()
def test_nd_proxy(self):
""" IPv6 Proxy ND """
#
# Generate some hosts in the subnet that we are proxying
#
self.pg0.generate_remote_hosts(8)
nsma = in6_getnsma(inet_pton(AF_INET6, self.pg0.local_ip6))
d = inet_ntop(AF_INET6, nsma)
#
# Send an NS for one of those remote hosts on one of the proxy links
# expect no response since it's from an address that is not
# on the link that has the prefix configured
#
ns_pg1 = (Ether(dst=in6_getnsmac(nsma), src=self.pg1.remote_mac) /
IPv6(dst=d,
src=self.pg0._remote_hosts[2].ip6) /
ICMPv6ND_NS(tgt=self.pg0.local_ip6) /
ICMPv6NDOptSrcLLAddr(
lladdr=self.pg0._remote_hosts[2].mac))
self.send_and_assert_no_replies(self.pg1, ns_pg1, "Off link NS")
#
# Add proxy support for the host
#
self.vapi.ip6nd_proxy_add_del(
is_add=1, ip=inet_pton(AF_INET6, self.pg0._remote_hosts[2].ip6),
sw_if_index=self.pg1.sw_if_index)
#
# try that NS again. this time we expect an NA back
#
self.send_and_expect_na(self.pg1, ns_pg1,
"NS to proxy entry",
dst_ip=self.pg0._remote_hosts[2].ip6,
tgt_ip=self.pg0.local_ip6)
#
# ... and that we have an entry in the ND cache
#
self.assertTrue(find_nbr(self,
self.pg1.sw_if_index,
self.pg0._remote_hosts[2].ip6))
#
# ... and we can route traffic to it
#
t = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
IPv6(dst=self.pg0._remote_hosts[2].ip6,
src=self.pg0.remote_ip6) /
inet6.UDP(sport=10000, dport=20000) /
Raw(b'\xa5' * 100))
self.pg0.add_stream(t)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg1.get_capture(1)
rx = rx[0]
self.assertEqual(rx[Ether].dst, self.pg0._remote_hosts[2].mac)
self.assertEqual(rx[Ether].src, self.pg1.local_mac)
self.assertEqual(rx[IPv6].src,
t[IPv6].src)
self.assertEqual(rx[IPv6].dst,
t[IPv6].dst)
#
# Test we proxy for the host on the main interface
#
ns_pg0 = (Ether(dst=in6_getnsmac(nsma), src=self.pg0.remote_mac) /
IPv6(dst=d, src=self.pg0.remote_ip6) /
ICMPv6ND_NS(
tgt=self.pg0._remote_hosts[2].ip6) /
ICMPv6NDOptSrcLLAddr(
lladdr=self.pg0.remote_mac))
self.send_and_expect_na(self.pg0, ns_pg0,
"NS to proxy entry on main",
tgt_ip=self.pg0._remote_hosts[2].ip6,
dst_ip=self.pg0.remote_ip6)
#
# Setup and resolve proxy for another host on another interface
#
ns_pg2 = (Ether(dst=in6_getnsmac(nsma), src=self.pg2.remote_mac) /
IPv6(dst=d,
src=self.pg0._remote_hosts[3].ip6) /
ICMPv6ND_NS(tgt=self.pg0.local_ip6) /
ICMPv6NDOptSrcLLAddr(
lladdr=self.pg0._remote_hosts[2].mac))
self.vapi.ip6nd_proxy_add_del(
is_add=1, ip=inet_pton(AF_INET6, self.pg0._remote_hosts[3].ip6),
sw_if_index=self.pg2.sw_if_index)
self.send_and_expect_na(self.pg2, ns_pg2,
"NS to proxy entry other interface",
dst_ip=self.pg0._remote_hosts[3].ip6,
tgt_ip=self.pg0.local_ip6)
self.assertTrue(find_nbr(self,
self.pg2.sw_if_index,
self.pg0._remote_hosts[3].ip6))
#
# hosts can communicate. pg2->pg1
#
t2 = (Ether(dst=self.pg2.local_mac,
src=self.pg0.remote_hosts[3].mac) /
IPv6(dst=self.pg0._remote_hosts[2].ip6,
src=self.pg0._remote_hosts[3].ip6) /
inet6.UDP(sport=10000, dport=20000) /
Raw(b'\xa5' * 100))
self.pg2.add_stream(t2)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg1.get_capture(1)
rx = rx[0]
self.assertEqual(rx[Ether].dst, self.pg0._remote_hosts[2].mac)
self.assertEqual(rx[Ether].src, self.pg1.local_mac)
self.assertEqual(rx[IPv6].src,
t2[IPv6].src)
self.assertEqual(rx[IPv6].dst,
t2[IPv6].dst)
#
# remove the proxy configs
#
self.vapi.ip6nd_proxy_add_del(
ip=inet_pton(AF_INET6, self.pg0._remote_hosts[2].ip6),
sw_if_index=self.pg1.sw_if_index, is_add=0)
self.vapi.ip6nd_proxy_add_del(
ip=inet_pton(AF_INET6, self.pg0._remote_hosts[3].ip6),
sw_if_index=self.pg2.sw_if_index, is_add=0)
self.assertFalse(find_nbr(self,
self.pg2.sw_if_index,
self.pg0._remote_hosts[3].ip6))
self.assertFalse(find_nbr(self,
self.pg1.sw_if_index,
self.pg0._remote_hosts[2].ip6))
#
# no longer proxy-ing...
#
self.send_and_assert_no_replies(self.pg0, ns_pg0, "Proxy unconfigured")
self.send_and_assert_no_replies(self.pg1, ns_pg1, "Proxy unconfigured")
self.send_and_assert_no_replies(self.pg2, ns_pg2, "Proxy unconfigured")
#
# no longer forwarding. traffic generates NS out of the glean/main
# interface
#
self.pg2.add_stream(t2)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg0.get_capture(1)
self.assertTrue(rx[0].haslayer(ICMPv6ND_NS))
class TestIPNull(VppTestCase):
""" IPv6 routes via NULL """
@classmethod
def setUpClass(cls):
super(TestIPNull, cls).setUpClass()
@classmethod
def tearDownClass(cls):
super(TestIPNull, cls).tearDownClass()
def setUp(self):
super(TestIPNull, self).setUp()
# create 2 pg interfaces
self.create_pg_interfaces(range(1))
for i in self.pg_interfaces:
i.admin_up()
i.config_ip6()
i.resolve_ndp()
def tearDown(self):
super(TestIPNull, self).tearDown()
for i in self.pg_interfaces:
i.unconfig_ip6()
i.admin_down()
def test_ip_null(self):
""" IP NULL route """
p = (Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac) /
IPv6(src=self.pg0.remote_ip6, dst="2001::1") /
inet6.UDP(sport=1234, dport=1234) /
Raw(b'\xa5' * 100))
#
# A route via IP NULL that will reply with ICMP unreachables
#
ip_unreach = VppIpRoute(
self, "2001::", 64,
[VppRoutePath("::", 0xffffffff,
type=FibPathType.FIB_PATH_TYPE_ICMP_UNREACH)])
ip_unreach.add_vpp_config()
self.pg0.add_stream(p)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg0.get_capture(1)
rx = rx[0]
icmp = rx[ICMPv6DestUnreach]
# 0 = "No route to destination"
self.assertEqual(icmp.code, 0)
# ICMP is rate limited. pause a bit
self.sleep(1)
#
# A route via IP NULL that will reply with ICMP prohibited
#
ip_prohibit = VppIpRoute(
self, "2001::1", 128,
[VppRoutePath("::", 0xffffffff,
type=FibPathType.FIB_PATH_TYPE_ICMP_PROHIBIT)])
ip_prohibit.add_vpp_config()
self.pg0.add_stream(p)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg0.get_capture(1)
rx = rx[0]
icmp = rx[ICMPv6DestUnreach]
# 1 = "Communication with destination administratively prohibited"
self.assertEqual(icmp.code, 1)
class TestIPDisabled(VppTestCase):
""" IPv6 disabled """
@classmethod
def setUpClass(cls):
super(TestIPDisabled, cls).setUpClass()
@classmethod
def tearDownClass(cls):
super(TestIPDisabled, cls).tearDownClass()
def setUp(self):
super(TestIPDisabled, self).setUp()
# create 2 pg interfaces
self.create_pg_interfaces(range(2))
# PG0 is IP enabled
self.pg0.admin_up()
self.pg0.config_ip6()
self.pg0.resolve_ndp()
# PG 1 is not IP enabled
self.pg1.admin_up()
def tearDown(self):
super(TestIPDisabled, self).tearDown()
for i in self.pg_interfaces:
i.unconfig_ip4()
i.admin_down()
def test_ip_disabled(self):
""" IP Disabled """
MRouteItfFlags = VppEnum.vl_api_mfib_itf_flags_t
MRouteEntryFlags = VppEnum.vl_api_mfib_entry_flags_t
#
# An (S,G).
# one accepting interface, pg0, 2 forwarding interfaces
#
route_ff_01 = VppIpMRoute(
self,
"::",
"ffef::1", 128,
MRouteEntryFlags.MFIB_API_ENTRY_FLAG_NONE,
[VppMRoutePath(self.pg1.sw_if_index,
MRouteItfFlags.MFIB_API_ITF_FLAG_ACCEPT),
VppMRoutePath(self.pg0.sw_if_index,
MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD)])
route_ff_01.add_vpp_config()
pu = (Ether(src=self.pg1.remote_mac,
dst=self.pg1.local_mac) /
IPv6(src="2001::1", dst=self.pg0.remote_ip6) /
inet6.UDP(sport=1234, dport=1234) /
Raw(b'\xa5' * 100))
pm = (Ether(src=self.pg1.remote_mac,
dst=self.pg1.local_mac) /
IPv6(src="2001::1", dst="ffef::1") /
inet6.UDP(sport=1234, dport=1234) /
Raw(b'\xa5' * 100))
#
# PG1 does not forward IP traffic
#
self.send_and_assert_no_replies(self.pg1, pu, "IPv6 disabled")
self.send_and_assert_no_replies(self.pg1, pm, "IPv6 disabled")
#
# IP enable PG1
#
self.pg1.config_ip6()
#
# Now we get packets through
#
self.pg1.add_stream(pu)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg0.get_capture(1)
self.pg1.add_stream(pm)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg0.get_capture(1)
#
# Disable PG1
#
self.pg1.unconfig_ip6()
#
# PG1 does not forward IP traffic
#
self.send_and_assert_no_replies(self.pg1, pu, "IPv6 disabled")
self.send_and_assert_no_replies(self.pg1, pm, "IPv6 disabled")
class TestIP6LoadBalance(VppTestCase):
""" IPv6 Load-Balancing """
@classmethod
def setUpClass(cls):
super(TestIP6LoadBalance, cls).setUpClass()
@classmethod
def tearDownClass(cls):
super(TestIP6LoadBalance, cls).tearDownClass()
def setUp(self):
super(TestIP6LoadBalance, self).setUp()
self.create_pg_interfaces(range(5))
mpls_tbl = VppMplsTable(self, 0)
mpls_tbl.add_vpp_config()
for i in self.pg_interfaces:
i.admin_up()
i.config_ip6()
i.resolve_ndp()
i.enable_mpls()
def tearDown(self):
for i in self.pg_interfaces:
i.unconfig_ip6()
i.admin_down()
i.disable_mpls()
super(TestIP6LoadBalance, self).tearDown()
def pg_send(self, input, pkts):
self.vapi.cli("clear trace")
input.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
def send_and_expect_load_balancing(self, input, pkts, outputs):
self.pg_send(input, pkts)
for oo in outputs:
rx = oo._get_capture(1)
self.assertNotEqual(0, len(rx))
def send_and_expect_one_itf(self, input, pkts, itf):
self.pg_send(input, pkts)
rx = itf.get_capture(len(pkts))
def test_ip6_load_balance(self):
""" IPv6 Load-Balancing """
#
# An array of packets that differ only in the destination port
# - IP only
# - MPLS EOS
# - MPLS non-EOS
# - MPLS non-EOS with an entropy label
#
port_ip_pkts = []
port_mpls_pkts = []
port_mpls_neos_pkts = []
port_ent_pkts = []
#
# An array of packets that differ only in the source address
#
src_ip_pkts = []
src_mpls_pkts = []
for ii in range(NUM_PKTS):
port_ip_hdr = (
IPv6(dst="3000::1", src="3000:1::1") /
inet6.UDP(sport=1234, dport=1234 + ii) /
Raw(b'\xa5' * 100))
port_ip_pkts.append((Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac) /
port_ip_hdr))
port_mpls_pkts.append((Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac) /
MPLS(label=66, ttl=2) /
port_ip_hdr))
port_mpls_neos_pkts.append((Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac) /
MPLS(label=67, ttl=2) /
MPLS(label=77, ttl=2) /
port_ip_hdr))
port_ent_pkts.append((Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac) /
MPLS(label=67, ttl=2) /
MPLS(label=14, ttl=2) /
MPLS(label=999, ttl=2) /
port_ip_hdr))
src_ip_hdr = (
IPv6(dst="3000::1", src="3000:1::%d" % ii) /
inet6.UDP(sport=1234, dport=1234) /
Raw(b'\xa5' * 100))
src_ip_pkts.append((Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac) /
src_ip_hdr))
src_mpls_pkts.append((Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac) /
MPLS(label=66, ttl=2) /
src_ip_hdr))
#
# A route for the IP packets
#
route_3000_1 = VppIpRoute(self, "3000::1", 128,
[VppRoutePath(self.pg1.remote_ip6,
self.pg1.sw_if_index),
VppRoutePath(self.pg2.remote_ip6,
self.pg2.sw_if_index)])
route_3000_1.add_vpp_config()
#
# a local-label for the EOS packets
#
binding = VppMplsIpBind(self, 66, "3000::1", 128, is_ip6=1)
binding.add_vpp_config()
#
# An MPLS route for the non-EOS packets
#
route_67 = VppMplsRoute(self, 67, 0,
[VppRoutePath(self.pg1.remote_ip6,
self.pg1.sw_if_index,
labels=[67]),
VppRoutePath(self.pg2.remote_ip6,
self.pg2.sw_if_index,
labels=[67])])
route_67.add_vpp_config()
#
# inject the packet on pg0 - expect load-balancing across the 2 paths
# - since the default hash config is to use IP src,dst and port
# src,dst
# We are not going to ensure equal amounts of packets across each link,
# since the hash algorithm is statistical and therefore this can never
# be guaranteed. But with 64 different packets we do expect some
# balancing. So instead just ensure there is traffic on each link.
#
self.send_and_expect_load_balancing(self.pg0, port_ip_pkts,
[self.pg1, self.pg2])
self.send_and_expect_load_balancing(self.pg0, src_ip_pkts,
[self.pg1, self.pg2])
self.send_and_expect_load_balancing(self.pg0, port_mpls_pkts,
[self.pg1, self.pg2])
self.send_and_expect_load_balancing(self.pg0, src_mpls_pkts,
[self.pg1, self.pg2])
self.send_and_expect_load_balancing(self.pg0, port_mpls_neos_pkts,
[self.pg1, self.pg2])
#
# The packets with Entropy label in should not load-balance,
# since the Entropy value is fixed.
#
self.send_and_expect_one_itf(self.pg0, port_ent_pkts, self.pg1)
#
# change the flow hash config so it's only IP src,dst
# - now only the stream with differing source address will
# load-balance
#
self.vapi.set_ip_flow_hash(vrf_id=0, src=1, dst=1, sport=0, dport=0,
is_ipv6=1)
self.send_and_expect_load_balancing(self.pg0, src_ip_pkts,
[self.pg1, self.pg2])
self.send_and_expect_load_balancing(self.pg0, src_mpls_pkts,
[self.pg1, self.pg2])
self.send_and_expect_one_itf(self.pg0, port_ip_pkts, self.pg2)
#
# change the flow hash config back to defaults
#
self.vapi.set_ip_flow_hash(vrf_id=0, src=1, dst=1, sport=1, dport=1,
is_ipv6=1)
#
# Recursive prefixes
# - testing that 2 stages of load-balancing occurs and there is no
# polarisation (i.e. only 2 of 4 paths are used)
#
port_pkts = []
src_pkts = []
for ii in range(257):
port_pkts.append((Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac) /
IPv6(dst="4000::1",
src="4000:1::1") /
inet6.UDP(sport=1234,
dport=1234 + ii) /
Raw(b'\xa5' * 100)))
src_pkts.append((Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac) /
IPv6(dst="4000::1",
src="4000:1::%d" % ii) /
inet6.UDP(sport=1234, dport=1234) /
Raw(b'\xa5' * 100)))
route_3000_2 = VppIpRoute(self, "3000::2", 128,
[VppRoutePath(self.pg3.remote_ip6,
self.pg3.sw_if_index),
VppRoutePath(self.pg4.remote_ip6,
self.pg4.sw_if_index)])
route_3000_2.add_vpp_config()
route_4000_1 = VppIpRoute(self, "4000::1", 128,
[VppRoutePath("3000::1",
0xffffffff),
VppRoutePath("3000::2",
0xffffffff)])
route_4000_1.add_vpp_config()
#
# inject the packet on pg0 - expect load-balancing across all 4 paths
#
self.vapi.cli("clear trace")
self.send_and_expect_load_balancing(self.pg0, port_pkts,
[self.pg1, self.pg2,
self.pg3, self.pg4])
self.send_and_expect_load_balancing(self.pg0, src_pkts,
[self.pg1, self.pg2,
self.pg3, self.pg4])
#
# Recursive prefixes
# - testing that 2 stages of load-balancing no choices
#
port_pkts = []
for ii in range(257):
port_pkts.append((Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac) /
IPv6(dst="6000::1",
src="6000:1::1") /
inet6.UDP(sport=1234,
dport=1234 + ii) /
Raw(b'\xa5' * 100)))
route_5000_2 = VppIpRoute(self, "5000::2", 128,
[VppRoutePath(self.pg3.remote_ip6,
self.pg3.sw_if_index)])
route_5000_2.add_vpp_config()
route_6000_1 = VppIpRoute(self, "6000::1", 128,
[VppRoutePath("5000::2",
0xffffffff)])
route_6000_1.add_vpp_config()
#
# inject the packet on pg0 - expect load-balancing across all 4 paths
#
self.vapi.cli("clear trace")
self.send_and_expect_one_itf(self.pg0, port_pkts, self.pg3)
class TestIP6Punt(VppTestCase):
""" IPv6 Punt Police/Redirect """
@classmethod
def setUpClass(cls):
super(TestIP6Punt, cls).setUpClass()
@classmethod
def tearDownClass(cls):
super(TestIP6Punt, cls).tearDownClass()
def setUp(self):
super(TestIP6Punt, self).setUp()
self.create_pg_interfaces(range(4))
for i in self.pg_interfaces:
i.admin_up()
i.config_ip6()
i.resolve_ndp()
def tearDown(self):
super(TestIP6Punt, self).tearDown()
for i in self.pg_interfaces:
i.unconfig_ip6()
i.admin_down()
def test_ip_punt(self):
""" IP6 punt police and redirect """
p = (Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac) /
IPv6(src=self.pg0.remote_ip6,
dst=self.pg0.local_ip6) /
inet6.TCP(sport=1234, dport=1234) /
Raw(b'\xa5' * 100))
pkts = p * 1025
#
# Configure a punt redirect via pg1.
#
nh_addr = self.pg1.remote_ip6
ip_punt_redirect = VppIpPuntRedirect(self, self.pg0.sw_if_index,
self.pg1.sw_if_index, nh_addr)
ip_punt_redirect.add_vpp_config()
self.send_and_expect(self.pg0, pkts, self.pg1)
#
# add a policer
#
policer = VppPolicer(self, "ip6-punt", 400, 0, 10, 0, rate_type=1)
policer.add_vpp_config()
ip_punt_policer = VppIpPuntPolicer(self, policer.policer_index,
is_ip6=True)
ip_punt_policer.add_vpp_config()
self.vapi.cli("clear trace")
self.pg0.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
#
# the number of packet received should be greater than 0,
# but not equal to the number sent, since some were policed
#
rx = self.pg1._get_capture(1)
self.assertGreater(len(rx), 0)
self.assertLess(len(rx), len(pkts))
#
# remove the policer. back to full rx
#
ip_punt_policer.remove_vpp_config()
policer.remove_vpp_config()
self.send_and_expect(self.pg0, pkts, self.pg1)
#
# remove the redirect. expect full drop.
#
ip_punt_redirect.remove_vpp_config()
self.send_and_assert_no_replies(self.pg0, pkts,
"IP no punt config")
#
# Add a redirect that is not input port selective
#
ip_punt_redirect = VppIpPuntRedirect(self, 0xffffffff,
self.pg1.sw_if_index, nh_addr)
ip_punt_redirect.add_vpp_config()
self.send_and_expect(self.pg0, pkts, self.pg1)
ip_punt_redirect.remove_vpp_config()
def test_ip_punt_dump(self):
""" IP6 punt redirect dump"""
#
# Configure a punt redirects
#
nh_address = self.pg3.remote_ip6
ipr_03 = VppIpPuntRedirect(self, self.pg0.sw_if_index,
self.pg3.sw_if_index, nh_address)
ipr_13 = VppIpPuntRedirect(self, self.pg1.sw_if_index,
self.pg3.sw_if_index, nh_address)
ipr_23 = VppIpPuntRedirect(self, self.pg2.sw_if_index,
self.pg3.sw_if_index, '0::0')
ipr_03.add_vpp_config()
ipr_13.add_vpp_config()
ipr_23.add_vpp_config()
#
# Dump pg0 punt redirects
#
self.assertTrue(ipr_03.query_vpp_config())
self.assertTrue(ipr_13.query_vpp_config())
self.assertTrue(ipr_23.query_vpp_config())
#
# Dump punt redirects for all interfaces
#
punts = self.vapi.ip_punt_redirect_dump(0xffffffff, is_ipv6=1)
self.assertEqual(len(punts), 3)
for p in punts:
self.assertEqual(p.punt.tx_sw_if_index, self.pg3.sw_if_index)
self.assertNotEqual(punts[1].punt.nh, self.pg3.remote_ip6)
self.assertEqual(str(punts[2].punt.nh), '::')
class TestIPDeag(VppTestCase):
""" IPv6 Deaggregate Routes """
@classmethod
def setUpClass(cls):
super(TestIPDeag, cls).setUpClass()
@classmethod
def tearDownClass(cls):
super(TestIPDeag, cls).tearDownClass()
def setUp(self):
super(TestIPDeag, self).setUp()
self.create_pg_interfaces(range(3))
for i in self.pg_interfaces:
i.admin_up()
i.config_ip6()
i.resolve_ndp()
def tearDown(self):
super(TestIPDeag, self).tearDown()
for i in self.pg_interfaces:
i.unconfig_ip6()
i.admin_down()
def test_ip_deag(self):
""" IP Deag Routes """
#
# Create a table to be used for:
# 1 - another destination address lookup
# 2 - a source address lookup
#
table_dst = VppIpTable(self, 1, is_ip6=1)
table_src = VppIpTable(self, 2, is_ip6=1)
table_dst.add_vpp_config()
table_src.add_vpp_config()
#
# Add a route in the default table to point to a deag/
# second lookup in each of these tables
#
route_to_dst = VppIpRoute(self, "1::1", 128,
[VppRoutePath("::",
0xffffffff,
nh_table_id=1)])
route_to_src = VppIpRoute(
self, "1::2", 128,
[VppRoutePath("::",
0xffffffff,
nh_table_id=2,
type=FibPathType.FIB_PATH_TYPE_SOURCE_LOOKUP)])
route_to_dst.add_vpp_config()
route_to_src.add_vpp_config()
#
# packets to these destination are dropped, since they'll
# hit the respective default routes in the second table
#
p_dst = (Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac) /
IPv6(src="5::5", dst="1::1") /
inet6.TCP(sport=1234, dport=1234) /
Raw(b'\xa5' * 100))
p_src = (Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac) /
IPv6(src="2::2", dst="1::2") /
inet6.TCP(sport=1234, dport=1234) /
Raw(b'\xa5' * 100))
pkts_dst = p_dst * 257
pkts_src = p_src * 257
self.send_and_assert_no_replies(self.pg0, pkts_dst,
"IP in dst table")
self.send_and_assert_no_replies(self.pg0, pkts_src,
"IP in src table")
#
# add a route in the dst table to forward via pg1
#
route_in_dst = VppIpRoute(self, "1::1", 128,
[VppRoutePath(self.pg1.remote_ip6,
self.pg1.sw_if_index)],
table_id=1)
route_in_dst.add_vpp_config()
self.send_and_expect(self.pg0, pkts_dst, self.pg1)
#
# add a route in the src table to forward via pg2
#
route_in_src = VppIpRoute(self, "2::2", 128,
[VppRoutePath(self.pg2.remote_ip6,
self.pg2.sw_if_index)],
table_id=2)
route_in_src.add_vpp_config()
self.send_and_expect(self.pg0, pkts_src, self.pg2)
#
# loop in the lookup DP
#
route_loop = VppIpRoute(self, "3::3", 128,
[VppRoutePath("::",
0xffffffff)])
route_loop.add_vpp_config()
p_l = (Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac) /
IPv6(src="3::4", dst="3::3") /
inet6.TCP(sport=1234, dport=1234) /
Raw(b'\xa5' * 100))
self.send_and_assert_no_replies(self.pg0, p_l * 257,
"IP lookup loop")
class TestIP6Input(VppTestCase):
""" IPv6 Input Exception Test Cases """
@classmethod
def setUpClass(cls):
super(TestIP6Input, cls).setUpClass()
@classmethod
def tearDownClass(cls):
super(TestIP6Input, cls).tearDownClass()
def setUp(self):
super(TestIP6Input, self).setUp()
self.create_pg_interfaces(range(2))
for i in self.pg_interfaces:
i.admin_up()
i.config_ip6()
i.resolve_ndp()
def tearDown(self):
super(TestIP6Input, self).tearDown()
for i in self.pg_interfaces:
i.unconfig_ip6()
i.admin_down()
def test_ip_input_icmp_reply(self):
""" IP6 Input Exception - Return ICMP (3,0) """
#
# hop limit - ICMP replies
#
p_version = (Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac) /
IPv6(src=self.pg0.remote_ip6,
dst=self.pg1.remote_ip6,
hlim=1) /
inet6.UDP(sport=1234, dport=1234) /
Raw(b'\xa5' * 100))
rx = self.send_and_expect(self.pg0, p_version * NUM_PKTS, self.pg0)
rx = rx[0]
icmp = rx[ICMPv6TimeExceeded]
# 0: "hop limit exceeded in transit",
self.assertEqual((icmp.type, icmp.code), (3, 0))
icmpv6_data = '\x0a' * 18
all_0s = "::"
all_1s = "FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF"
@parameterized.expand([
# Name, src, dst, l4proto, msg, timeout
("src='iface', dst='iface'", None, None,
inet6.UDP(sport=1234, dport=1234), "funky version", None),
("src='All 0's', dst='iface'", all_0s, None,
ICMPv6EchoRequest(id=0xb, seq=5, data=icmpv6_data), None, 0.1),
("src='iface', dst='All 0's'", None, all_0s,
ICMPv6EchoRequest(id=0xb, seq=5, data=icmpv6_data), None, 0.1),
("src='All 1's', dst='iface'", all_1s, None,
ICMPv6EchoRequest(id=0xb, seq=5, data=icmpv6_data), None, 0.1),
("src='iface', dst='All 1's'", None, all_1s,
ICMPv6EchoRequest(id=0xb, seq=5, data=icmpv6_data), None, 0.1),
("src='All 1's', dst='All 1's'", all_1s, all_1s,
ICMPv6EchoRequest(id=0xb, seq=5, data=icmpv6_data), None, 0.1),
])
def test_ip_input_no_replies(self, name, src, dst, l4, msg, timeout):
self._testMethodDoc = 'IPv6 Input Exception - %s' % name
p_version = (Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac) /
IPv6(src=src or self.pg0.remote_ip6,
dst=dst or self.pg1.remote_ip6,
version=3) /
l4 /
Raw(b'\xa5' * 100))
self.send_and_assert_no_replies(self.pg0, p_version * NUM_PKTS,
remark=msg or "",
timeout=timeout)
def test_hop_by_hop(self):
""" Hop-by-hop header test """
p = (Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac) /
IPv6(src=self.pg0.remote_ip6, dst=self.pg0.local_ip6) /
IPv6ExtHdrHopByHop() /
inet6.UDP(sport=1234, dport=1234) /
Raw(b'\xa5' * 100))
self.pg0.add_stream(p)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
class TestIPReplace(VppTestCase):
""" IPv6 Table Replace """
@classmethod
def setUpClass(cls):
super(TestIPReplace, cls).setUpClass()
@classmethod
def tearDownClass(cls):
super(TestIPReplace, cls).tearDownClass()
def setUp(self):
super(TestIPReplace, self).setUp()
self.create_pg_interfaces(range(4))
table_id = 1
self.tables = []
for i in self.pg_interfaces:
i.admin_up()
i.config_ip6()
i.generate_remote_hosts(2)
self.tables.append(VppIpTable(self, table_id,
True).add_vpp_config())
table_id += 1
def tearDown(self):
super(TestIPReplace, self).tearDown()
for i in self.pg_interfaces:
i.admin_down()
i.unconfig_ip6()
def test_replace(self):
""" IP Table Replace """
MRouteItfFlags = VppEnum.vl_api_mfib_itf_flags_t
MRouteEntryFlags = VppEnum.vl_api_mfib_entry_flags_t
N_ROUTES = 20
links = [self.pg0, self.pg1, self.pg2, self.pg3]
routes = [[], [], [], []]
# the sizes of 'empty' tables
for t in self.tables:
self.assertEqual(len(t.dump()), 2)
self.assertEqual(len(t.mdump()), 5)
# load up the tables with some routes
for ii, t in enumerate(self.tables):
for jj in range(1, N_ROUTES):
uni = VppIpRoute(
self, "2001::%d" % jj if jj != 0 else "2001::", 128,
[VppRoutePath(links[ii].remote_hosts[0].ip6,
links[ii].sw_if_index),
VppRoutePath(links[ii].remote_hosts[1].ip6,
links[ii].sw_if_index)],
table_id=t.table_id).add_vpp_config()
multi = VppIpMRoute(
self, "::",
"ff:2001::%d" % jj, 128,
MRouteEntryFlags.MFIB_API_ENTRY_FLAG_NONE,
[VppMRoutePath(self.pg0.sw_if_index,
MRouteItfFlags.MFIB_API_ITF_FLAG_ACCEPT,
proto=FibPathProto.FIB_PATH_NH_PROTO_IP6),
VppMRoutePath(self.pg1.sw_if_index,
MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD,
proto=FibPathProto.FIB_PATH_NH_PROTO_IP6),
VppMRoutePath(self.pg2.sw_if_index,
MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD,
proto=FibPathProto.FIB_PATH_NH_PROTO_IP6),
VppMRoutePath(self.pg3.sw_if_index,
MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD,
proto=FibPathProto.FIB_PATH_NH_PROTO_IP6)],
table_id=t.table_id).add_vpp_config()
routes[ii].append({'uni': uni,
'multi': multi})
#
# replace the tables a few times
#
for kk in range(3):
# replace each table
for t in self.tables:
t.replace_begin()
# all the routes are still there
for ii, t in enumerate(self.tables):
dump = t.dump()
mdump = t.mdump()
for r in routes[ii]:
self.assertTrue(find_route_in_dump(dump, r['uni'], t))
self.assertTrue(find_mroute_in_dump(mdump, r['multi'], t))
# redownload the even numbered routes
for ii, t in enumerate(self.tables):
for jj in range(0, N_ROUTES, 2):
routes[ii][jj]['uni'].add_vpp_config()
routes[ii][jj]['multi'].add_vpp_config()
# signal each table converged
for t in self.tables:
t.replace_end()
# we should find the even routes, but not the odd
for ii, t in enumerate(self.tables):
dump = t.dump()
mdump = t.mdump()
for jj in range(0, N_ROUTES, 2):
self.assertTrue(find_route_in_dump(
dump, routes[ii][jj]['uni'], t))
self.assertTrue(find_mroute_in_dump(
mdump, routes[ii][jj]['multi'], t))
for jj in range(1, N_ROUTES - 1, 2):
self.assertFalse(find_route_in_dump(
dump, routes[ii][jj]['uni'], t))
self.assertFalse(find_mroute_in_dump(
mdump, routes[ii][jj]['multi'], t))
# reload all the routes
for ii, t in enumerate(self.tables):
for r in routes[ii]:
r['uni'].add_vpp_config()
r['multi'].add_vpp_config()
# all the routes are still there
for ii, t in enumerate(self.tables):
dump = t.dump()
mdump = t.mdump()
for r in routes[ii]:
self.assertTrue(find_route_in_dump(dump, r['uni'], t))
self.assertTrue(find_mroute_in_dump(mdump, r['multi'], t))
#
# finally flush the tables for good measure
#
for t in self.tables:
t.flush()
self.assertEqual(len(t.dump()), 2)
self.assertEqual(len(t.mdump()), 5)
class TestIP6Replace(VppTestCase):
""" IPv4 Interface Address Replace """
@classmethod
def setUpClass(cls):
super(TestIP6Replace, cls).setUpClass()
@classmethod
def tearDownClass(cls):
super(TestIP6Replace, cls).tearDownClass()
def setUp(self):
super(TestIP6Replace, self).setUp()
self.create_pg_interfaces(range(4))
for i in self.pg_interfaces:
i.admin_up()
def tearDown(self):
super(TestIP6Replace, self).tearDown()
for i in self.pg_interfaces:
i.admin_down()
def get_n_pfxs(self, intf):
return len(self.vapi.ip_address_dump(intf.sw_if_index, True))
def test_replace(self):
""" IP interface address replace """
intf_pfxs = [[], [], [], []]
# add prefixes to each of the interfaces
for i in range(len(self.pg_interfaces)):
intf = self.pg_interfaces[i]
# 2001:16:x::1/64
addr = "2001:16:%d::1" % intf.sw_if_index
a = VppIpInterfaceAddress(self, intf, addr, 64).add_vpp_config()
intf_pfxs[i].append(a)
# 2001:16:x::2/64 - a different address in the same subnet as above
addr = "2001:16:%d::2" % intf.sw_if_index
a = VppIpInterfaceAddress(self, intf, addr, 64).add_vpp_config()
intf_pfxs[i].append(a)
# 2001:15:x::2/64 - a different address and subnet
addr = "2001:15:%d::2" % intf.sw_if_index
a = VppIpInterfaceAddress(self, intf, addr, 64).add_vpp_config()
intf_pfxs[i].append(a)
# a dump should n_address in it
for intf in self.pg_interfaces:
self.assertEqual(self.get_n_pfxs(intf), 3)
#
# remove all the address thru a replace
#
self.vapi.sw_interface_address_replace_begin()
self.vapi.sw_interface_address_replace_end()
for intf in self.pg_interfaces:
self.assertEqual(self.get_n_pfxs(intf), 0)
#
# add all the interface addresses back
#
for p in intf_pfxs:
for v in p:
v.add_vpp_config()
for intf in self.pg_interfaces:
self.assertEqual(self.get_n_pfxs(intf), 3)
#
# replace again, but this time update/re-add the address on the first
# two interfaces
#
self.vapi.sw_interface_address_replace_begin()
for p in intf_pfxs[:2]:
for v in p:
v.add_vpp_config()
self.vapi.sw_interface_address_replace_end()
# on the first two the address still exist,
# on the other two they do not
for intf in self.pg_interfaces[:2]:
self.assertEqual(self.get_n_pfxs(intf), 3)
for p in intf_pfxs[:2]:
for v in p:
self.assertTrue(v.query_vpp_config())
for intf in self.pg_interfaces[2:]:
self.assertEqual(self.get_n_pfxs(intf), 0)
#
# add all the interface addresses back on the last two
#
for p in intf_pfxs[2:]:
for v in p:
v.add_vpp_config()
for intf in self.pg_interfaces:
self.assertEqual(self.get_n_pfxs(intf), 3)
#
# replace again, this time add different prefixes on all the interfaces
#
self.vapi.sw_interface_address_replace_begin()
pfxs = []
for intf in self.pg_interfaces:
# 2001:18:x::1/64
addr = "2001:18:%d::1" % intf.sw_if_index
pfxs.append(VppIpInterfaceAddress(self, intf, addr,
64).add_vpp_config())
self.vapi.sw_interface_address_replace_end()
# only .18 should exist on each interface
for intf in self.pg_interfaces:
self.assertEqual(self.get_n_pfxs(intf), 1)
for pfx in pfxs:
self.assertTrue(pfx.query_vpp_config())
#
# remove everything
#
self.vapi.sw_interface_address_replace_begin()
self.vapi.sw_interface_address_replace_end()
for intf in self.pg_interfaces:
self.assertEqual(self.get_n_pfxs(intf), 0)
#
# add prefixes to each interface. post-begin add the prefix from
# interface X onto interface Y. this would normally be an error
# since it would generate a 'duplicate address' warning. but in
# this case, since what is newly downloaded is sane, it's ok
#
for intf in self.pg_interfaces:
# 2001:18:x::1/64
addr = "2001:18:%d::1" % intf.sw_if_index
VppIpInterfaceAddress(self, intf, addr, 64).add_vpp_config()
self.vapi.sw_interface_address_replace_begin()
pfxs = []
for intf in self.pg_interfaces:
# 2001:18:x::1/64
addr = "2001:18:%d::1" % (intf.sw_if_index + 1)
pfxs.append(VppIpInterfaceAddress(self, intf,
addr, 64).add_vpp_config())
self.vapi.sw_interface_address_replace_end()
self.logger.info(self.vapi.cli("sh int addr"))
for intf in self.pg_interfaces:
self.assertEqual(self.get_n_pfxs(intf), 1)
for pfx in pfxs:
self.assertTrue(pfx.query_vpp_config())
class TestIP6LinkLocal(VppTestCase):
""" IPv6 Link Local """
@classmethod
def setUpClass(cls):
super(TestIP6LinkLocal, cls).setUpClass()
@classmethod
def tearDownClass(cls):
super(TestIP6LinkLocal, cls).tearDownClass()
def setUp(self):
super(TestIP6LinkLocal, self).setUp()
self.create_pg_interfaces(range(2))
for i in self.pg_interfaces:
i.admin_up()
def tearDown(self):
super(TestIP6LinkLocal, self).tearDown()
for i in self.pg_interfaces:
i.admin_down()
def test_ip6_ll(self):
""" IPv6 Link Local """
#
# two APIs to add a link local address.
# 1 - just like any other prefix
# 2 - with the special set LL API
#
#
# First with the API to set a 'normal' prefix
#
ll1 = "fe80:1::1"
ll2 = "fe80:2::2"
ll3 = "fe80:3::3"
VppIpInterfaceAddress(self, self.pg0, ll1, 128).add_vpp_config()
#
# should be able to ping the ll
#
p_echo_request_1 = (Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac) /
IPv6(src=ll2,
dst=ll1) /
ICMPv6EchoRequest())
self.send_and_expect(self.pg0, [p_echo_request_1], self.pg0)
#
# change the link-local on pg0
#
v_ll3 = VppIpInterfaceAddress(self, self.pg0,
ll3, 128).add_vpp_config()
p_echo_request_3 = (Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac) /
IPv6(src=ll2,
dst=ll3) /
ICMPv6EchoRequest())
self.send_and_expect(self.pg0, [p_echo_request_3], self.pg0)
#
# set a normal v6 prefix on the link
#
self.pg0.config_ip6()
self.send_and_expect(self.pg0, [p_echo_request_3], self.pg0)
# the link-local cannot be removed
with self.vapi.assert_negative_api_retval():
v_ll3.remove_vpp_config()
#
# Use the specific link-local API on pg1
#
VppIp6LinkLocalAddress(self, self.pg1, ll1).add_vpp_config()
self.send_and_expect(self.pg1, [p_echo_request_1], self.pg1)
VppIp6LinkLocalAddress(self, self.pg1, ll3).add_vpp_config()
self.send_and_expect(self.pg1, [p_echo_request_3], self.pg1)
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)
