python udp简单实现

注意： ubuntu环境下SO_BROADCAST和SO_REUSEADDR一定要加上，不然收不到广播。

import socket from algorithm import landmark_match, char_checksum, DOpenPort, DWritePort, get_ip, singleNumber2,get_mac_address,getaddr,UDPSocket def updsocket(): s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) s.setsockopt(socket.SOL_SOCKET,socket.SO_BROADCAST,1) s.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1) print(get_ip()) #绑定端口： s.bind(('', 20001)) while True: #接收来自客户端的数据,使用recvfrom print("------------------------------------") data, addr = s.recvfrom(2048) print(data) json =str({"SN":get_mac_address(),"dhcp":1,"ip":get_ip(),"softver":"5.2.5"}) s.sendto(json.encode('utf-8'),addr)