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ot_test_off_mesh_route_traffic.py
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ot_test_off_mesh_route_traffic.py
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# Copyright 2020 Google LLC
#
# 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
#
# https://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.
"""Test traffic flow to off-mesh addresses resulted from addition of off-mesh routes (on routers and FEDs).
"""
import enum
import random
import time
import unittest
from silk.config import wpan_constants as wpan
from silk.node.wpan_node import WpanCredentials
from silk.utils import process_cleanup
from silk.tools import wpan_table_parser
from silk.tools.wpan_util import verify_within
from silk.unit_tests.test_utils import random_string
import silk.hw.hw_resource as hwr
import silk.node.fifteen_four_dev_board as ffdb
import silk.tests.testcase as testcase
hwr.global_instance()
WAIT_TIME = 10
NUM_ROUTES = 3
NUM_ROUTES_LOCAL = 1
ON_MESH_PREFIX = "fd00:1234::"
OFF_MESH_ROUTE_1 = "fd00:abba::"
OFF_MESH_ROUTE_2 = "fd00:cafe::"
OFF_MESH_ROUTE_3 = "fd00:baba::"
OFF_MESH_ADDR_1 = OFF_MESH_ROUTE_1 + "1"
OFF_MESH_ADDR_2 = OFF_MESH_ROUTE_2 + "2"
OFF_MESH_ADDR_3 = OFF_MESH_ROUTE_3 + "3"
POLL_INTERVAL = 400
class TestOffMeshRouteTraffic(testcase.TestCase):
# Test description: Adding off-mesh routes (on routers and FEDs) and traffic flow to off-mesh addresses.
#
# Test topology:
#
# r1 ---- r2
# | |
# | |
# fed1 sed2
#
# The off-mesh-routes are added as follows:
# - `r1` adds `OFF_MESH_ROUTE_1`,
# - `r2` adds `OFF_MESH_ROUTE_2`,
# - `fed1` adds `OFF_MESH_ROUTE_3`.
#
# Traffic flow:
# - From `sed2` to an address matching `OFF_MESH_ROUTE_1` (verify it is received on `r1`),
# - From `r1` to an address matching `OFF_MESH_ROUTE_2` (verify it is received on `r2`),
# - From `r2` to an address matching `OFF_MESH_ROUTE_3` (verify it is received on `fed1`)
#
@classmethod
def hardware_select(cls: 'TestOffMeshRouteTraffic'):
cls.r1 = ffdb.ThreadDevBoard()
cls.fed1 = ffdb.ThreadDevBoard()
cls.r2 = ffdb.ThreadDevBoard()
cls.sed2 = ffdb.ThreadDevBoard()
cls.all_nodes = [cls.r1, cls.fed1, cls.r2, cls.sed2]
@classmethod
@testcase.setup_class_decorator
def setUpClass(cls: 'TestOffMeshRouteTraffic'):
# Check and clean up wpantund process if any left over
process_cleanup.ps_cleanup()
cls.hardware_select()
for device in cls.all_nodes:
device.set_logger(cls.logger)
cls.add_test_device(device)
device.set_up()
cls.network_data = WpanCredentials(network_name="SILK-{0:04X}".format(random.randint(0, 0xffff)),
psk="00112233445566778899aabbccdd{0:04x}".format(random.randint(0, 0xffff)),
channel=random.randint(11, 25),
fabric_id="{0:06x}dead".format(random.randint(0, 0xffffff)))
cls.thread_sniffer_init(cls.network_data.channel)
@classmethod
@testcase.teardown_class_decorator
def tearDownClass(cls: 'TestOffMeshRouteTraffic'):
for device in cls.device_list:
device.tear_down()
@testcase.setup_decorator
def setUp(self):
pass
@testcase.teardown_decorator
def tearDown(self):
pass
@testcase.test_method_decorator
def test01_disable_autoupdate_interface_address_on_ncp(self):
for node in self.all_nodes:
# Disable `AutoUpdateInterfaceAddrsOnNCP` feature on wpantund
# for all nodes. This ensures that added IPv6 address (on linux
# interface) are not pushed to NCP (and therefore are not
# on-mesh).
node.setprop("Daemon:IPv6:AutoUpdateInterfaceAddrsOnNCP", "false")
self.assertEqual(node.getprop("Daemon:IPv6:AutoUpdateInterfaceAddrsOnNCP"), "false")
@testcase.test_method_decorator
def test02_pairing(self):
# allowlisting between leader and router
self.r1.allowlist_node(self.r2)
self.r2.allowlist_node(self.r1)
# allowlisting between leader and end device
self.r1.allowlist_node(self.fed1)
self.fed1.allowlist_node(self.r1)
# allowlisting between router and sleepy-end-device
self.r2.allowlist_node(self.sed2)
self.sed2.allowlist_node(self.r2)
self.r1.form(self.network_data, "router")
self.r1.permit_join(60)
self.wait_for_completion(self.device_list)
self.logger.info(self.r1.ip6_lla)
self.logger.info(self.r1.ip6_thread_ula)
self.network_data.xpanid = self.r1.xpanid
self.network_data.panid = self.r1.panid
self.r2.join(self.network_data, "router")
self.wait_for_completion(self.device_list)
self.fed1.join(self.network_data, "end-node")
self.wait_for_completion(self.device_list)
self.sed2.join(self.network_data, "sleepy-end-device")
self.sed2.set_sleep_poll_interval(POLL_INTERVAL)
self.wait_for_completion(self.device_list)
@testcase.test_method_decorator
def test03_verify_off_mesh_routes(self):
# Add on-mesh prefix
self.r1.config_gateway(ON_MESH_PREFIX)
# The off-mesh-routes are added as follows:
# - `r1` adds OFF_MESH_ROUTE_1,
# - `r2` adds OFF_MESH_ROUTE_2,
# - `fed1` adds OFF_MESH_ROUTE_3.
self.r1.add_route_using_prefix(OFF_MESH_ROUTE_1)
self.r1.add_ip6_address_on_interface(OFF_MESH_ADDR_1, prefix_len=64)
self.wait_for_completion(self.device_list)
self.r2.add_route_using_prefix(OFF_MESH_ROUTE_2)
self.r2.add_ip6_address_on_interface(OFF_MESH_ADDR_2, prefix_len=64)
self.wait_for_completion(self.device_list)
self.fed1.add_route_using_prefix(OFF_MESH_ROUTE_3)
self.fed1.add_ip6_address_on_interface(OFF_MESH_ADDR_3, prefix_len=64)
self.wait_for_completion(self.device_list)
# Wait till network data is updated on r1, r2, and sed2 and they all see all
# the added off-mesh routes.
time.sleep(WAIT_TIME)
def check_off_mesh_routes():
# If a node itself adds a route, the route entry will be seen twice in
# its WPAN_THREAD_OFF_MESH_ROUTES list (one time as part of network-wide
# network data and again as part of the local network data). Note that
# `r1 and `r2` each add a route, while `sed2` does not.
r1_routes = self.r1.wpanctl("get", "get " + wpan.WPAN_THREAD_OFF_MESH_ROUTES, 2)
r1_routes = wpan_table_parser.parse_list(r1_routes)
self.assertEqual(len(r1_routes), NUM_ROUTES + NUM_ROUTES_LOCAL)
r2_routes = self.r2.wpanctl("get", "get " + wpan.WPAN_THREAD_OFF_MESH_ROUTES, 2)
r2_routes = wpan_table_parser.parse_list(r2_routes)
self.assertEqual(len(r2_routes), NUM_ROUTES + NUM_ROUTES_LOCAL)
sed2_routes = self.sed2.wpanctl("get", "get " + wpan.WPAN_THREAD_OFF_MESH_ROUTES, 2)
sed2_routes = wpan_table_parser.parse_list(sed2_routes)
self.assertEqual(len(sed2_routes), NUM_ROUTES)
verify_within(check_off_mesh_routes, WAIT_TIME)
@testcase.test_method_decorator
def test04_transmit_receive(self):
# Traffic from `sed2` to `OFF_MESH_ADDR_1` (verify that it is received on`r1`).
# Traffic from `r1` to `OFF_MESH_ADDR_2` (verify that it is received on `r2`),
# Traffic from `r2` to `OFF_MESH_ADDR_3` (verify that it is received on `fed1`)
class AddressType(enum.Enum):
Prefix = 0
addresses = [
(self.sed2, self.r1, AddressType.Prefix, OFF_MESH_ADDR_1),
(self.r1, self.r2, AddressType.Prefix, OFF_MESH_ADDR_2),
(self.r2, self.fed1, AddressType.Prefix, OFF_MESH_ADDR_3),
]
timeout = 5
delay = 1
for i, (src, dst, src_type, dst_address) in enumerate(addresses):
port = random.randint(10000 + i * 100, 10099 + i * 100)
message = random_string(10)
src_address = ""
if src_type == AddressType.Prefix:
address = src.find_ip6_address_with_prefix(ON_MESH_PREFIX)
self.wait_for_completion(self.device_list)
src_address = f"{address}%{src.netns}"
dst.receive_udp_data(port, message, timeout)
time.sleep(delay)
src.send_udp_data(dst_address, port, message, src_address)
time.sleep(timeout - delay)
if __name__ == "__main__":
unittest.main()