esp-idf/examples/protocols/mdns/mdns_example_test.py

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import re
import os
import sys
import socket
import time
import struct
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import dpkt
import dpkt.dns
from threading import Thread
# this is a test case write with tiny-test-fw.
# to run test cases outside tiny-test-fw,
# we need to set environment variable `TEST_FW_PATH`,
# then get and insert `TEST_FW_PATH` to sys path before import FW module
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try:
import IDF
except ImportError:
test_fw_path = os.getenv("TEST_FW_PATH")
if test_fw_path and test_fw_path not in sys.path:
sys.path.insert(0, test_fw_path)
import IDF
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import DUT
g_run_server = True
g_done = False
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def mdns_server(esp_host):
global g_done
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UDP_IP = "0.0.0.0"
UDP_PORT = 5353
MCAST_GRP = '224.0.0.251'
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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)
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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)
dns = dpkt.dns.DNS(b'\x00\x00\x01\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x01')
sock.settimeout(30)
resp_dns = dpkt.dns.DNS(b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
resp_dns.op = dpkt.dns.DNS_QR | dpkt.dns.DNS_AA
resp_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 = u'tinytester.local'
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arr.ip = socket.inet_aton('127.0.0.1')
resp_dns. an.append(arr)
sock.sendto(resp_dns.pack(),(MCAST_GRP,UDP_PORT))
while g_run_server:
try:
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m = sock.recvfrom(1024)
dns = dpkt.dns.DNS(m[0])
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if len(dns.qd) > 0 and dns.qd[0].type == dpkt.dns.DNS_A:
if dns.qd[0].name == u'tinytester.local':
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print(dns.__repr__(),dns.qd[0].name)
sock.sendto(resp_dns.pack(),(MCAST_GRP,UDP_PORT))
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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 esp32-mdns query")
g_done = True
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print(dns.an[0].name)
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'
sock.sendto(dns.pack(),(MCAST_GRP,UDP_PORT))
print("Sending esp32-mdns query")
time.sleep(0.5)
sock.sendto(resp_dns.pack(),(MCAST_GRP,UDP_PORT))
except socket.timeout:
break
except dpkt.UnpackError:
continue
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@IDF.idf_example_test(env_tag="Example_WIFI")
def test_examples_protocol_mdns(env, extra_data):
global g_run_server
"""
steps: |
1. join AP + init mdns example
2. get the dut host name (and IP address)
3. check the mdns name is accessible
4. check DUT output if mdns advertized host is resolved
"""
dut1 = env.get_dut("mdns-test", "examples/protocols/mdns")
# check and log bin size
binary_file = os.path.join(dut1.app.binary_path, "mdns-test.bin")
bin_size = os.path.getsize(binary_file)
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IDF.log_performance("mdns-test_bin_size", "{}KB".format(bin_size // 1024))
IDF.check_performance("mdns-test_bin_size", bin_size // 1024)
# 1. start mdns application
dut1.start_app()
# 2. get the dut host name (and IP address)
specific_host = dut1.expect(re.compile(r"mdns hostname set to: \[([^\]]+)\]"), timeout=30)
specific_host = str(specific_host[0])
thread1 = Thread(target=mdns_server, args=(specific_host,))
thread1.start()
try:
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dut1.expect(re.compile(r" sta ip: ([^,]+),"), timeout=30)
except DUT.ExpectTimeout:
g_run_server = False
thread1.join()
raise ValueError('ENV_TEST_FAILURE: Cannot connect to AP')
# 3. check the mdns name is accessible
start = time.time()
while (time.time() - start) <= 60:
if g_done:
break
time.sleep(0.5)
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if g_done is False:
raise ValueError('Test has failed: did not receive mdns answer within timeout')
# 4. check DUT output if mdns advertized host is resolved
try:
dut1.expect(re.compile(r"mdns-test: Query A: tinytester.local resolved to: 127.0.0.1"), timeout=30)
finally:
g_run_server = False
thread1.join()
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if __name__ == '__main__':
test_examples_protocol_mdns()