UDP服务器

由于UDP服务器不是面向连接的，所以不用像TCP服务器那样那么多设置，直接等待进来的连接就好了

伪代码：

ss = socket()　　　　　　　　　　　　　　#创建一个服务器套接字
ss.bind()　　　　　　　　　　　　　　　　 #绑定服务器套接字
inf_loop:　　　　　　　　　　　　　　　　　
    cs = ss.recvfrom()/ss.sendti()
ss.close()

UDP server

#!/usr/bin/env python

from socket import *
from time import ctime

HOST=''
PORT=21567
BUFSIZ=1024
ADDR=(HOST,PORT)

udpSerSock =socket(AF_INET,SOCK_DGRAM)
udpSerSock.bind(ADDR)

while True:
    print 'waiting for message...'
    data,addr=udpSerSock.recvfrom(BUFSIZ)
    udpSerSock.sendto('[%s] %s' % (ctime(),data),addr)
    print '...received from and returned to:',addr

udpSerSock.close()

udp client:

#!/usr/bin/env python

from socket import *

HOST='localhost'
PORT=21567
BUFSIZ=1024
ADDR=(HOST,PORT)

udpCliSock=socket(AF_INET,SOCK_DGRAM)

while True:
    data = raw_input('>')
    if not data:
        break
    udpCliSock.sendto(data,ADDR)
    data,ADDR=udpCliSock.recvfrom(BUFSIZ)
    if not data:
        break
    print data
udpCliSock.close()

 

server运行：

[nanjing3@master python]$ ./tsUserv.py 
waiting for message...
...received from and returned to: ('127.0.0.1', 36960)
waiting for message...
...received from and returned to: ('127.0.0.1', 41671)
waiting for message...
...received from and returned to: ('127.0.0.1', 41671)
waiting for message...
...received from and returned to: ('127.0.0.1', 41671)
waiting for message...

client 运行：

[nanjing3@master python]$ ./tsUcli.py 
>1
[Wed Nov  7 03:39:06 2012] 1
>2
[Wed Nov  7 03:39:10 2012] 2
>hi,  
[Wed Nov  7 18:32:33 2012] hi,