python3通过udp实现组播数据的发送和接收操作

import socket
import re

ANY = "0.0.0.0"
DES_IP = "239.255.255.250"
PORT = 37020
# xml_str = b'<"1.0" encoding="utf-8"?><Probe><Uuid>B2D5D4D2-808C-40F6-87CD-694C05C2B274</Uuid><Types>inquiry</Types></Probe> '
xml_str = b'<"1.0" encoding="utf-8"?><Probe><Uuid>CB09F608-E016-4EE8-869A-CA186852F12E</Uuid><Types>inquiry</Types></Probe> '

# 创建UDP socket
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
# 允许端口复用
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
# 绑定监听多播数据包的端口
s.bind((ANY, PORT))
# 声明该socket为多播类型
s.setsockopt(socket.IPPROTO_IP, socket.IP_MULTICAST_TTL, 255)
# 加入多播组，组地址由第三个参数制定
s.setsockopt(
  socket.IPPROTO_IP,
  socket.IP_ADD_MEMBERSHIP,
  socket.inet_aton(DES_IP) + socket.inet_aton(ANY)
)
s.setblocking(False)
s.sendto(xml_str, (DES_IP, PORT))
while True:
  try:
    data, address = s.recvfrom(2048)
  except Exception as e:
    # print(e)
    pass
  else:
    print(address)
    # print(data)
    try:
      IPv4 = re.search(re.compile(r"<IPv4Address>(.*", re.S), str(data))[1]
      MAC = re.search(re.compile(r"<MAC>(.*", re.S), str(data))[1]
    except TypeError:
      pass
    else:
      # print(data)
      print("IPv4: {}".format(IPv4))
      print("MAC: {}".format(MAC))

import socket

def receive_message():
  udp_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) #创建一个套接字
  udp_socket.bind(('', 63630)) #绑定本地信息,自己电脑的ip和程序的端口。ip一般不用写，表示本机的任意一个ip，端口大于常用的1023就可以
  while True:
    udp_data = udp_socket.recvfrom(1024) #接收数据，1024表示本次接收的最大字节数
    if udp_data[0].decode(encoding='gbk') != 'end':
      print('{}:{}'.format(str(udp_data[1]), udp_data[0].decode(encoding='gbk')))
    else:
      break
  udp_socket.close() #关闭套接字

if __name__ == '__main__':
  receive_message()