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[border-router] add vicarious router solicitation (#6514)

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This commit adds vicarious router solicitation which is described in
https://www.ietf.org/archive/id/draft-lemon-stub-networks-02.html#section-3.1.1
This commit is contained in:
kangping
2021-05-20 12:32:59 -07:00
committed by GitHub
parent 516ae7df34
commit f1ab57bb66
4 changed files with 388 additions and 103 deletions
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tests/scripts/thread-cert/border_router/test_vicarious_router_solicit.py
Executable
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@@ -0,0 +1,195 @@
#!/usr/bin/env python3
#
# Copyright (c) 2021, The OpenThread Authors.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# 3. Neither the name of the copyright holder nor the
# names of its contributors may be used to endorse or promote products
# derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 'AS IS'
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
import ipaddress
import logging
import unittest
import config
import thread_cert
# Test description:
# This test verifies Vicarious Router Solicitation.
#
# Topology:
# -------------(eth)----------------------------
# | | |
# BR1 BR2 HOST
# | |
# ROUTER1 ROUTER2
#
# Thread Net1 Thread Net2
#
BR1 = 1
ROUTER1 = 2
BR2 = 3
ROUTER2 = 4
HOST = 5
CHANNEL1 = 18
CHANNEL2 = 19
class MultiThreadNetworks(thread_cert.TestCase):
USE_MESSAGE_FACTORY = False
TOPOLOGY = {
BR1: {
'name': 'BR_1',
'allowlist': [ROUTER1],
'is_otbr': True,
'version': '1.2',
'channel': CHANNEL1,
'router_selection_jitter': 1,
},
ROUTER1: {
'name': 'Router_1',
'allowlist': [BR1],
'version': '1.2',
'channel': CHANNEL1,
'router_selection_jitter': 1,
},
BR2: {
'name': 'BR_2',
'allowlist': [ROUTER2],
'is_otbr': True,
'version': '1.2',
'channel': CHANNEL2,
'router_selection_jitter': 1,
},
ROUTER2: {
'name': 'Router_2',
'allowlist': [BR2],
'version': '1.2',
'channel': CHANNEL2,
'router_selection_jitter': 1,
},
HOST: {
'name': 'Host',
'is_host': True
},
}
def test(self):
ON_LINK_PREFIX = 'fd00::/64'
br1 = self.nodes[BR1]
router1 = self.nodes[ROUTER1]
br2 = self.nodes[BR2]
router2 = self.nodes[ROUTER2]
host = self.nodes[HOST]
host.start(start_radvd=True, prefix=ON_LINK_PREFIX, slaac=True)
self.simulator.go(5)
br1.start()
self.simulator.go(5)
self.assertEqual('leader', br1.get_state())
router1.start()
self.simulator.go(5)
self.assertEqual('router', router1.get_state())
self.simulator.go(10)
self.collect_ipaddrs()
logging.info("BR1 addrs: %r", br1.get_addrs())
logging.info("ROUTER1 addrs: %r", router1.get_addrs())
logging.info("HOST addrs: %r", host.get_addrs())
self.assertEqual(len(br1.get_routes()), 1)
br1_on_link_prefix = br1.get_routes()[0].split(' ')[0]
self.assertEqual(ipaddress.IPv6Network(br1_on_link_prefix), ipaddress.IPv6Network(ON_LINK_PREFIX))
host_on_link_addr = host.get_matched_ula_addresses(br1_on_link_prefix)[0]
self.assertTrue(router1.ping(host_on_link_addr))
self.assertTrue(
host.ping(router1.get_ip6_address(config.ADDRESS_TYPE.OMR)[0], backbone=True, interface=host_on_link_addr))
# Force kill the radvd host so that BR2 will start advertising its own on-link prefix.
host.kill_radvd_service()
br2.start()
self.simulator.go(5)
self.assertEqual('leader', br2.get_state())
router2.start()
self.simulator.go(5)
self.assertEqual('router', router2.get_state())
self.simulator.go(25)
self.collect_ipaddrs()
logging.info("BR1 addrs: %r", br1.get_addrs())
logging.info("ROUTER1 addrs: %r", router1.get_addrs())
logging.info("BR2 addrs: %r", br2.get_addrs())
logging.info("ROUTER2 addrs: %r", router2.get_addrs())
logging.info("HOST addrs: %r", host.get_addrs())
self.assertTrue(len(br1.get_prefixes()) == 1)
self.assertTrue(len(router1.get_prefixes()) == 1)
self.assertTrue(len(br2.get_prefixes()) == 1)
self.assertTrue(len(router2.get_prefixes()) == 1)
br1_omr_prefix = br1.get_prefixes()[0].split(' ')[0]
br2_omr_prefix = br2.get_prefixes()[0].split(' ')[0]
self.assertNotEqual(br1_omr_prefix, br2_omr_prefix)
# Verify that BR1 removed ON_LINK_PREFIX from its
# external routes list.
self.assertEqual(len(br1.get_routes()), 2)
self.assertEqual(len(router1.get_routes()), 2)
self.assertEqual(len(br2.get_routes()), 2)
self.assertEqual(len(router2.get_routes()), 2)
br1_external_routes = [route.split(' ')[0] for route in br1.get_routes()]
br2_external_routes = [route.split(' ')[0] for route in br2.get_routes()]
on_link_prefixes = list(set(br1_external_routes).intersection(br2_external_routes))
self.assertEqual(len(on_link_prefixes), 1)
on_link_prefix = on_link_prefixes[0]
# Verify that both BR1 and BR2 are using a new on-link prefix.
# BR1 is depending on the Vicarious Router Solicitation to find
# out that the ON_LINK_PREFIX is stale and starts Router Solicitation
# on its own.
self.assertNotEqual(ipaddress.IPv6Network(on_link_prefix), ipaddress.IPv6Network(ON_LINK_PREFIX))
host_on_link_addr = host.get_matched_ula_addresses(on_link_prefix)[0]
self.assertTrue(router1.ping(host_on_link_addr))
self.assertTrue(
host.ping(router1.get_ip6_address(config.ADDRESS_TYPE.OMR)[0], backbone=True, interface=host_on_link_addr))
self.assertTrue(router2.ping(host.get_matched_ula_addresses(on_link_prefix)[0]))
self.assertTrue(
host.ping(router2.get_ip6_address(config.ADDRESS_TYPE.OMR)[0], backbone=True, interface=host_on_link_addr))
self.assertTrue(router1.ping(router2.get_ip6_address(config.ADDRESS_TYPE.OMR)[0]))
self.assertTrue(router2.ping(router1.get_ip6_address(config.ADDRESS_TYPE.OMR)[0]))
if __name__ == '__main__':
unittest.main()
tests/scripts/thread-cert/node.py
+6 -3
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@@ -2823,8 +2823,8 @@ interface eth0
AdvReachableTime 200;
AdvRetransTimer 200;
AdvDefaultLifetime 1800;
MinRtrAdvInterval 3;
MaxRtrAdvInterval 30;
MinRtrAdvInterval 1200;
MaxRtrAdvInterval 1800;
AdvDefaultPreference low;
prefix %s
@@ -2842,6 +2842,9 @@ EOF
def stop_radvd_service(self):
self.bash('service radvd stop')
def kill_radvd_service(self):
self.bash('pkill radvd')
class OtbrNode(LinuxHost, NodeImpl, OtbrDocker):
is_otbr = True
@@ -2889,7 +2892,7 @@ class HostNode(LinuxHost, OtbrDocker):
addrs = []
for addr in self.get_ip6_address(config.ADDRESS_TYPE.ONLINK_ULA):
if addr.startswith(prefix.split('::')[0]):
if ipaddress.IPv6Address(addr) in ipaddress.IPv6Network(prefix):
addrs.append(addr)
return addrs