python udp 广播

来源：互联网发布：行测怎么提速知乎编辑：程序博客网时间：2024/05/17 01:22

最近有需求写了个udp　广播的工具，百度了半天，发现满地坑，wireshark 抓了半天包，发现都是只能localhost收发。这里就记录一下吧

listener.py

#!/usr/bin/env python # -*- coding:UTF-8 -*-from socket import *from time import ctimeHOST = '127.0.0.1'PORT = 21567BUFSIZE = 1024ADDR = (HOST,PORT)udpSerSock = socket(AF_INET, SOCK_DGRAM)udpSerSock.bind(('',PORT))print 'wating for message...'while True:    data, addr = udpSerSock.recvfrom(BUFSIZE)    print('...received ->%s  %s'%(addr,data) )udpSerSock.close()

brocaster.py

from socket import *HOST = '<broadcast>'PORT = 21567BUFSIZE = 1024ADDR = (HOST, PORT)udpCliSock = socket(AF_INET, SOCK_DGRAM)udpCliSock.bind(('', 0))udpCliSock.setsockopt(SOL_SOCKET, SO_BROADCAST, 1)while True:    data = raw_input('>')    if not data:        break    print "sending -> %s"%data    udpCliSock.sendto(data,ADDR)##    data,ADDR = udpCliSock.recvfrom(BUFSIZE)##    if not data:##        break##    print dataudpCliSock.close()

核心i就是bind和setsockopt　　

以后类似的代码就直接找python的参考代码吧，为什么手欠用百度。。。。少了谷歌没法活了

http://svn.python.org/projects/python/trunk/Demo/

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