esp-who/components/mdns/tests/test_apps/pytest_mdns_app.py

321 lines
11 KiB
Python

# SPDX-FileCopyrightText: 2022 Espressif Systems (Shanghai) CO LTD
# SPDX-License-Identifier: Apache-2.0
import re
import select
import socket
import struct
import time
from threading import Event, Thread
import dpkt
import dpkt.dns
import pytest
UDP_PORT = 5353
MCAST_GRP = '224.0.0.251'
# This service is created from esp board startup
SERVICE_NAME = u'ESP32-WebServer._http._tcp.local'
SUB_SERVICE_NAME = u'_server._sub._http._tcp.local'
# This host name answer sent by host, when there is query from board
HOST_NAME = u'tinytester.local'
# This servce answer sent by host, when there is query from board
MDNS_HOST_SERVICE = u'ESP32._http._tcp.local'
# Number of retries to receive mdns answear
RETRY_COUNT = 10
stop_mdns_listener = Event()
start_mdns_listener = Event()
esp_service_answered = Event()
esp_sub_service_answered = Event()
esp_host_answered = Event()
esp_delegated_host_answered = Event()
@pytest.mark.skip
# Get query of ESP32-WebServer._http._tcp.local service
def get_mdns_service_query(service): # type:(str) -> dpkt.dns.Msg
dns = dpkt.dns.DNS()
dns.op = dpkt.dns.DNS_QR | dpkt.dns.DNS_AA
dns.rcode = dpkt.dns.DNS_RCODE_NOERR
arr = dpkt.dns.DNS.RR()
arr.cls = dpkt.dns.DNS_IN
arr.type = dpkt.dns.DNS_SRV
arr.name = service
arr.target = socket.inet_aton('127.0.0.1')
arr.srvname = service
dns.qd.append(arr)
print('Created mdns service query: {} '.format(dns.__repr__()))
return dns.pack()
@pytest.mark.skip
# Get query of _server_.sub._http._tcp.local sub service
def get_mdns_sub_service_query(sub_service): # type:(str) -> dpkt.dns.Msg
dns = dpkt.dns.DNS()
dns.op = dpkt.dns.DNS_QR | dpkt.dns.DNS_AA
dns.rcode = dpkt.dns.DNS_RCODE_NOERR
arr = dpkt.dns.DNS.RR()
arr.cls = dpkt.dns.DNS_IN
arr.type = dpkt.dns.DNS_PTR
arr.name = sub_service
arr.target = socket.inet_aton('127.0.0.1')
arr.ptrname = sub_service
dns.qd.append(arr)
print('Created mdns subtype service query: {} '.format(dns.__repr__()))
return dns.pack()
@pytest.mark.skip
# Get query for host resolution
def get_dns_query_for_esp(esp_host): # type:(str) -> dpkt.dns.Msg
dns = dpkt.dns.DNS()
arr = dpkt.dns.DNS.RR()
arr.cls = dpkt.dns.DNS_IN
arr.name = esp_host + u'.local'
dns.qd.append(arr)
print('Created query for esp host: {} '.format(dns.__repr__()))
return dns.pack()
@pytest.mark.skip
# Get mdns answer for host resoloution
def get_dns_answer_to_mdns(tester_host): # type:(str) -> dpkt.dns.Msg
dns = dpkt.dns.DNS()
dns.op = dpkt.dns.DNS_QR | dpkt.dns.DNS_AA
dns.rcode = dpkt.dns.DNS_RCODE_NOERR
arr = dpkt.dns.DNS.RR()
arr.cls = dpkt.dns.DNS_IN
arr.type = dpkt.dns.DNS_A
arr.name = tester_host
arr.ip = socket.inet_aton('127.0.0.1')
dns.an.append(arr)
print('Created answer to mdns query: {} '.format(dns.__repr__()))
return dns.pack()
@pytest.mark.skip
# Get mdns answer for service query
def get_dns_answer_to_service_query(
mdns_service): # type:(str) -> dpkt.dns.Msg
dns = dpkt.dns.DNS()
dns.op = dpkt.dns.DNS_QR | dpkt.dns.DNS_AA
dns.rcode = dpkt.dns.DNS_RCODE_NOERR
arr = dpkt.dns.DNS.RR()
arr.name = mdns_service
arr.cls = dpkt.dns.DNS_IN
arr.type = dpkt.dns.DNS_SRV
arr.priority = 0
arr.weight = 0
arr.port = 100
arr.srvname = mdns_service
arr.ip = socket.inet_aton('127.0.0.1')
dns.an.append(arr)
print('Created answer to mdns query: {} '.format(dns.__repr__()))
return dns.pack()
@pytest.mark.skip
def mdns_listener(esp_host): # type:(str) -> None
print('mdns_listener thread started')
UDP_IP = '0.0.0.0'
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT, 1)
sock.setblocking(False)
sock.bind((UDP_IP, UDP_PORT))
mreq = struct.pack('4sl', socket.inet_aton(MCAST_GRP), socket.INADDR_ANY)
sock.setsockopt(socket.IPPROTO_IP, socket.IP_ADD_MEMBERSHIP, mreq)
last_query_timepoint = time.time()
QUERY_TIMEOUT = 0.2
while not stop_mdns_listener.is_set():
try:
start_mdns_listener.set()
current_time = time.time()
if current_time - last_query_timepoint > QUERY_TIMEOUT:
last_query_timepoint = current_time
timeout = max(
0, QUERY_TIMEOUT - (current_time - last_query_timepoint))
read_socks, _, _ = select.select([sock], [], [], timeout)
if not read_socks:
continue
data, _ = sock.recvfrom(1024)
dns = dpkt.dns.DNS(data)
# Receives queries from esp board and sends answers
if len(dns.qd) > 0:
if dns.qd[0].name == HOST_NAME:
print('Received query: {} '.format(dns.__repr__()))
sock.sendto(get_dns_answer_to_mdns(HOST_NAME),
(MCAST_GRP, UDP_PORT))
if dns.qd[0].name == HOST_NAME:
print('Received query: {} '.format(dns.__repr__()))
sock.sendto(get_dns_answer_to_mdns(HOST_NAME),
(MCAST_GRP, UDP_PORT))
if dns.qd[0].name == MDNS_HOST_SERVICE:
print('Received query: {} '.format(dns.__repr__()))
sock.sendto(
get_dns_answer_to_service_query(MDNS_HOST_SERVICE),
(MCAST_GRP, UDP_PORT))
# Receives answers from esp board and sets event flags for python test cases
if len(dns.an) == 1:
if dns.an[0].name.startswith(SERVICE_NAME):
print('Received answer to service query: {}'.format(
dns.__repr__()))
esp_service_answered.set()
if len(dns.an) > 1:
if dns.an[1].name.startswith(SUB_SERVICE_NAME):
print('Received answer for sub service query: {}'.format(
dns.__repr__()))
esp_sub_service_answered.set()
if len(dns.an) > 0 and dns.an[0].type == dpkt.dns.DNS_A:
if dns.an[0].name == esp_host + u'.local':
print('Received answer to esp32-mdns query: {}'.format(
dns.__repr__()))
esp_host_answered.set()
if dns.an[0].name == esp_host + u'-delegated.local':
print('Received answer to esp32-mdns-delegate query: {}'.
format(dns.__repr__()))
esp_delegated_host_answered.set()
except socket.timeout:
break
except dpkt.UnpackError:
continue
@pytest.mark.skip
def create_socket(): # type:() -> socket.socket
UDP_IP = '0.0.0.0'
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT, 1)
sock.setblocking(False)
sock.bind((UDP_IP, UDP_PORT))
mreq = struct.pack('4sl', socket.inet_aton(MCAST_GRP), socket.INADDR_ANY)
sock.setsockopt(socket.IPPROTO_IP, socket.IP_ADD_MEMBERSHIP, mreq)
return sock
@pytest.mark.skip
def test_query_dns_http_service(service): # type: (str) -> None
print('SRV: Query {}'.format(service))
sock = create_socket()
packet = get_mdns_service_query(service)
for _ in range(RETRY_COUNT):
if esp_service_answered.wait(timeout=25):
break
sock.sendto(packet, (MCAST_GRP, UDP_PORT))
else:
raise RuntimeError(
'Test has failed: did not receive mdns answer within timeout')
@pytest.mark.skip
def test_query_dns_sub_service(sub_service): # type: (str) -> None
print('PTR: Query {}'.format(sub_service))
sock = create_socket()
packet = get_mdns_sub_service_query(sub_service)
for _ in range(RETRY_COUNT):
if esp_sub_service_answered.wait(timeout=25):
break
sock.sendto(packet, (MCAST_GRP, UDP_PORT))
else:
raise RuntimeError(
'Test has failed: did not receive mdns answer within timeout')
@pytest.mark.skip
def test_query_dns_host(esp_host): # type: (str) -> None
print('A: {}'.format(esp_host))
sock = create_socket()
packet = get_dns_query_for_esp(esp_host)
for _ in range(RETRY_COUNT):
if esp_host_answered.wait(timeout=25):
break
sock.sendto(packet, (MCAST_GRP, UDP_PORT))
else:
raise RuntimeError(
'Test has failed: did not receive mdns answer within timeout')
@pytest.mark.skip
def test_query_dns_host_delegated(esp_host): # type: (str) -> None
print('A: {}'.format(esp_host))
sock = create_socket()
packet = get_dns_query_for_esp(esp_host + '-delegated')
for _ in range(RETRY_COUNT):
if esp_delegated_host_answered.wait(timeout=25):
break
sock.sendto(packet, (MCAST_GRP, UDP_PORT))
else:
raise RuntimeError(
'Test has failed: did not receive mdns answer within timeout')
@pytest.mark.esp32
@pytest.mark.esp32s2
@pytest.mark.esp32c3
@pytest.mark.generic
def test_app_esp_mdns(dut):
# 1. get the dut host name (and IP address)
specific_host = dut.expect(
re.compile(b'mdns hostname set to: \[([^\]]+)\]'), # noqa: W605
timeout=30).group(1).decode()
esp_ip = dut.expect(
re.compile(
b' IPv4 address: ([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+)'), # noqa: W605
timeout=30).group(1).decode()
print('Got IP={}'.format(esp_ip))
mdns_responder = Thread(target=mdns_listener, args=(str(specific_host), ))
def start_case(case, desc, result): # type: (str, str, str) -> None
print('Starting {}: {}'.format(case, desc))
dut.write(case)
res = bytes(result, encoding='utf8')
dut.expect(re.compile(res), timeout=30)
try:
# start dns listener thread
mdns_responder.start()
# wait untill mdns listener thred started
if not start_mdns_listener.wait(timeout=5):
raise ValueError(
'Test has failed: mdns listener thread did not start')
# query dns service from host, answer should be received from esp board
test_query_dns_http_service(SERVICE_NAME)
# query dns sub-service from host, answer should be received from esp board
test_query_dns_sub_service(SUB_SERVICE_NAME)
# query dns host name, answer should be received from esp board
test_query_dns_host(specific_host)
# query dns host name delegated, answer should be received from esp board
test_query_dns_host_delegated(specific_host)
# query service from esp board, answer should be received from host
start_case('CONFIG_TEST_QUERY_SERVICE',
'Query SRV ESP32._http._tcp.local', 'SRV:ESP32')
# query dns-host from esp board, answer should be received from host
start_case('CONFIG_TEST_QUERY_HOST', 'Query tinytester.local',
'tinytester.local resolved to: 127.0.0.1')
# query dns-host aynchrounusely from esp board, answer should be received from host
start_case('CONFIG_TEST_QUERY_HOST_ASYNC',
'Query tinytester.local async',
'Async query resolved to A:127.0.0.1')
finally:
stop_mdns_listener.set()
mdns_responder.join()