UDP是TCP/IP协议中的传输层协议的一种，本文介绍了在Linux下编写基于UDP协议的Client/Server模型的程序的方法，并给出了一个echo Client/Server例子程序。-UDP is a TCP/IP protocol in a Transport Protocol, this article describes the preparation of Linux based on the UDP protocol under the Client/Server model

linphone-3.3.0 版本，这个就不多做介绍了，知道的人都知道！如果还是不知道，那么看看下面英文的介绍吧。-Features Linphone provides a large amount of functionalities. List of supported features: * audio with the following codecs: speex (narrow band and wideband), G711 (ulaw,alaw),

contains one code for udp client , simple tct server , forked server , threaded server , echo server

客户端之间发送PING报文，客户端接受其他客户端的PING报文，回复信息。 个人想法：通过UDP连接，客户端与服务器建立连接，登录只要用户名（不能重复），能从服务器查询在线用户。-There are four main components to phase 2: 1) Add functionality to send “ping” messages over UDP and listen for echo responses, in order to