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mdns: updated example test to exercise also hostnames resolved by lwip gethostbyname and getaddrinfo

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* Original commit: espressif/esp-idf@f3cb91ef71
This commit is contained in:
David Cermak
2019-06-19 13:20:58 +02:00
committed by suren-gabrielyan-espressif
parent f44c569422
commit d8d6b35553
3 changed files with 112 additions and 39 deletions
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101
examples/protocols/mdns/mdns_example_test.py
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@ -6,7 +6,7 @@ import time
import struct
import dpkt
import dpkt.dns
from threading import Thread
from threading import Thread, Event
# this is a test case write with tiny-test-fw.
@ -24,52 +24,78 @@ except ImportError:
import DUT
g_run_server = True
g_done = False
# g_run_server = True
# g_done = False
stop_mdns_server = Event()
esp_answered = Event()
def get_dns_query_for_esp(esp_host):
dns = dpkt.dns.DNS(b'\x00\x00\x01\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x01')
dns.qd[0].name = esp_host + u'.local'
print("Created query for esp host: {} ".format(dns.__repr__()))
return dns.pack()
def get_dns_answer_to_mdns(tester_host):
dns = dpkt.dns.DNS(b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
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()
def get_dns_answer_to_mdns_lwip(tester_host, id):
dns = dpkt.dns.DNS(b"\x5e\x39\x84\x00\x00\x01\x00\x01\x00\x00\x00\x00\x0a\x64\x61\x76\x69\x64"
b"\x2d\x63\x6f\x6d\x70\x05\x6c\x6f\x63\x61\x6c\x00\x00\x01\x00\x01\xc0\x0c"
b"\x00\x01\x00\x01\x00\x00\x00\x0a\x00\x04\xc0\xa8\x0a\x6c")
dns.qd[0].name = tester_host
dns.an[0].name = tester_host
dns.an[0].ip = socket.inet_aton('127.0.0.1')
dns.an[0].rdata = socket.inet_aton('127.0.0.1')
dns.id = id
print("Created answer to mdns (lwip) query: {} ".format(dns.__repr__()))
return dns.pack()
def mdns_server(esp_host):
global g_done
global esp_answered
UDP_IP = "0.0.0.0"
UDP_PORT = 5353
MCAST_GRP = '224.0.0.251'
TESTER_NAME = u'tinytester.local'
TESTER_NAME_LWIP = u'tinytester-lwip.local'
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.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'
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:
while not stop_mdns_server.is_set():
try:
m = sock.recvfrom(1024)
dns = dpkt.dns.DNS(m[0])
if not esp_answered.is_set():
sock.sendto(get_dns_query_for_esp(esp_host), (MCAST_GRP,UDP_PORT))
time.sleep(0.2)
data, addr = sock.recvfrom(1024)
dns = dpkt.dns.DNS(data)
if len(dns.qd) > 0 and dns.qd[0].type == dpkt.dns.DNS_A:
if dns.qd[0].name == u'tinytester.local':
print(dns.__repr__(),dns.qd[0].name)
sock.sendto(resp_dns.pack(),(MCAST_GRP,UDP_PORT))
if dns.qd[0].name == TESTER_NAME:
print("Received query: {} ".format(dns.__repr__()))
sock.sendto(get_dns_answer_to_mdns(TESTER_NAME), (MCAST_GRP,UDP_PORT))
elif dns.qd[0].name == TESTER_NAME_LWIP:
print("Received query: {} ".format(dns.__repr__()))
sock.sendto(get_dns_answer_to_mdns_lwip(TESTER_NAME_LWIP, dns.id), addr)
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
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')
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))
print("Received answer to esp32-mdns query: {}".format(dns.__repr__()))
esp_answered.set()
except socket.timeout:
break
except dpkt.UnpackError:
@ -78,7 +104,7 @@ def mdns_server(esp_host):
@IDF.idf_example_test(env_tag="Example_WIFI")
def test_examples_protocol_mdns(env, extra_data):
global g_run_server
global stop_mdns_server
"""
steps: |
1. join AP + init mdns example
@ -102,22 +128,19 @@ def test_examples_protocol_mdns(env, extra_data):
try:
dut1.expect(re.compile(r" sta ip: ([^,]+),"), timeout=30)
except DUT.ExpectTimeout:
g_run_server = False
stop_mdns_server.set()
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)
if g_done is False:
if not esp_answered.wait(timeout=30):
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)
dut1.expect(re.compile(r"mdns-test: gethostbyname: tinytester-lwip.local resolved to: 127.0.0.1"), timeout=30)
dut1.expect(re.compile(r"mdns-test: getaddrinfo: tinytester-lwip.local resolved to: 127.0.0.1"), timeout=30)
finally:
g_run_server = False
stop_mdns_server.set()
thread1.join()