135 lines
5.3 KiB
Python
135 lines
5.3 KiB
Python
import re
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import os
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import socket
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import time
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import struct
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import dpkt
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import dpkt.dns
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from threading import Thread, Event
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from tiny_test_fw import DUT
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import ttfw_idf
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# g_run_server = True
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# g_done = False
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stop_mdns_server = Event()
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esp_answered = Event()
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def get_dns_query_for_esp(esp_host):
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dns = dpkt.dns.DNS(b'\x00\x00\x01\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x01')
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dns.qd[0].name = esp_host + u'.local'
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print("Created query for esp host: {} ".format(dns.__repr__()))
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return dns.pack()
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def get_dns_answer_to_mdns(tester_host):
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dns = dpkt.dns.DNS(b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
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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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def get_dns_answer_to_mdns_lwip(tester_host, id):
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dns = dpkt.dns.DNS(b"\x5e\x39\x84\x00\x00\x01\x00\x01\x00\x00\x00\x00\x0a\x64\x61\x76\x69\x64"
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b"\x2d\x63\x6f\x6d\x70\x05\x6c\x6f\x63\x61\x6c\x00\x00\x01\x00\x01\xc0\x0c"
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b"\x00\x01\x00\x01\x00\x00\x00\x0a\x00\x04\xc0\xa8\x0a\x6c")
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dns.qd[0].name = tester_host
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dns.an[0].name = tester_host
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dns.an[0].ip = socket.inet_aton('127.0.0.1')
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dns.an[0].rdata = socket.inet_aton('127.0.0.1')
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dns.id = id
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print("Created answer to mdns (lwip) query: {} ".format(dns.__repr__()))
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return dns.pack()
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def mdns_server(esp_host):
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global esp_answered
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UDP_IP = "0.0.0.0"
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UDP_PORT = 5353
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MCAST_GRP = '224.0.0.251'
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TESTER_NAME = u'tinytester.local'
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TESTER_NAME_LWIP = u'tinytester-lwip.local'
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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.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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sock.settimeout(30)
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while not stop_mdns_server.is_set():
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try:
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if not esp_answered.is_set():
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sock.sendto(get_dns_query_for_esp(esp_host), (MCAST_GRP,UDP_PORT))
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time.sleep(0.2)
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data, addr = sock.recvfrom(1024)
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dns = dpkt.dns.DNS(data)
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if len(dns.qd) > 0 and dns.qd[0].type == dpkt.dns.DNS_A:
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if dns.qd[0].name == TESTER_NAME:
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print("Received query: {} ".format(dns.__repr__()))
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sock.sendto(get_dns_answer_to_mdns(TESTER_NAME), (MCAST_GRP,UDP_PORT))
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elif dns.qd[0].name == TESTER_NAME_LWIP:
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print("Received query: {} ".format(dns.__repr__()))
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sock.sendto(get_dns_answer_to_mdns_lwip(TESTER_NAME_LWIP, dns.id), addr)
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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(dns.__repr__()))
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esp_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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@ttfw_idf.idf_example_test(env_tag="Example_WIFI")
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def test_examples_protocol_mdns(env, extra_data):
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global stop_mdns_server
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"""
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steps: |
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1. join AP + init mdns example
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2. get the dut host name (and IP address)
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3. check the mdns name is accessible
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4. check DUT output if mdns advertized host is resolved
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"""
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dut1 = env.get_dut("mdns-test", "examples/protocols/mdns", dut_class=ttfw_idf.ESP32DUT)
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# check and log bin size
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binary_file = os.path.join(dut1.app.binary_path, "mdns-test.bin")
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bin_size = os.path.getsize(binary_file)
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ttfw_idf.log_performance("mdns-test_bin_size", "{}KB".format(bin_size // 1024))
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ttfw_idf.check_performance("mdns-test_bin_size", bin_size // 1024)
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# 1. start mdns application
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dut1.start_app()
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# 2. get the dut host name (and IP address)
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specific_host = dut1.expect(re.compile(r"mdns hostname set to: \[([^\]]+)\]"), timeout=30)
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specific_host = str(specific_host[0])
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thread1 = Thread(target=mdns_server, args=(specific_host,))
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thread1.start()
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try:
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dut1.expect(re.compile(r" sta ip: ([^,]+),"), timeout=30)
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except DUT.ExpectTimeout:
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stop_mdns_server.set()
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thread1.join()
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raise ValueError('ENV_TEST_FAILURE: Cannot connect to AP')
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# 3. check the mdns name is accessible
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if not esp_answered.wait(timeout=30):
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raise ValueError('Test has failed: did not receive mdns answer within timeout')
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# 4. check DUT output if mdns advertized host is resolved
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try:
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dut1.expect(re.compile(r"mdns-test: Query A: tinytester.local resolved to: 127.0.0.1"), timeout=30)
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dut1.expect(re.compile(r"mdns-test: gethostbyname: tinytester-lwip.local resolved to: 127.0.0.1"), timeout=30)
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dut1.expect(re.compile(r"mdns-test: getaddrinfo: tinytester-lwip.local resolved to: 127.0.0.1"), timeout=30)
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finally:
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stop_mdns_server.set()
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thread1.join()
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if __name__ == '__main__':
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test_examples_protocol_mdns()
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