计算机网络UDP套接字编程

1、UDP的服务器编程步骤：
①.创建一个socket，用函数socket()
②.绑定IP地址、端口等信息到socket上，用函数bind()
③.循环接收数据，用函数recvfrom()
④.关闭网络连接
2、UDP的客户端编程步骤：
①.创建一个socket，用函数socket()
②.绑定IP地址、端口等信息到socket上，用函数bind()
③.设置对方的IP地址和端口等属性
④.发送数据，用函数sendto()
⑤.关闭网络连接

代码：
客户端：

from socket import *

HOST = '119.45.115.128'
PORT = 3555
BUFSIZ = 1024
ADDR = (HOST, PORT)
udpClientSocket = socket(AF_INET, SOCK_DGRAM)
while True:
    try:
        data = input('>')
        print('send the data: ' + data)
        msg = data.encode('utf-8')

        # 发送数据:
        udpClientSocket.sendto(msg, ADDR)
        # 接收数据:
        print('receive the reply: ' + udpClientSocket.recv(BUFSIZ).decode('utf-8'))
    except Exception as e:
        print(e)

udpClientSocket.close()

服务端：

from socket import *
from time import ctime

HOST = ''
PORT = 3555
BUFSIZ = 1024
ADDR = (HOST, PORT)

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

while True:
    try:
        data, addr = udpServerSocket.recvfrom(BUFSIZ)
        print('来自主机 %s，端口: %s.' % addr)
        print(data.decode('utf-8'))
        reply = 'Hello, this is udpserver!'
        udpServerSocket.sendto(reply.encode('utf-8'), addr)
    except Exception as e:
        print(e)

udpServerSocket.close()