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