#! C:\Python36\python.exe
# -*- coding:utf-8 -*-
'''
核心操作如下：
ss = socket()       # 创建服务器套接字
ss.bind()   　　    # 绑定服务器套接字
inf_loop:           # 服务器无限循环
    cs = ss.recvfrom()/ss.sendto()  # 对话接受与发送数据
ss.close()          # 关闭服务器套接字
'''
from socket import *
from time import ctime

HOST = ''  # 主机名
PORT = 21567  # 端口号
BUFSIZE = 1024  # 缓冲区大小1K
ADDR = (HOST, PORT)

udpSerSock = socket(AF_INET, SOCK_DGRAM)
udpSerSock.bind(ADDR)  # 绑定地址到套接字

while True:  # 无限循环等待连接到来
    try:
        print('Waiting for message ....')
        data, addr = udpSerSock.recvfrom(BUFSIZE)  # 接受UDP
        print('Get client msg is: ', data)
        udpSerSock.sendto('[%s] %s' % (ctime(), data), addr)  # 发送UDP
        print('Received from and returned to: ', addr)

    except Exception as e:
        print('Error: ', e)
udpSerSock.close()  # 关闭服务器