TCP非正常断开的检测，采用KeepAlive探测方法-TCP-Disconnect the normal detection, detection method using KeepAlive

通过代码示例，演示如果使用windows API 设置TCP/IP心跳包，利用TCP/IP协议自带的KeepAlive功能断开孤立连接。

在vxworks环境下，tornado2.2开发环境下的TCP 服务器端，具有在超时断开连接功能，是使用KEEPALIVE来实现的。其中有KEEPALIVE的使用解释-In vxworks environment, tornado2.2 development environment TCP server-side, with the time-out disconnect function is to use KEEPALIVE to achieve. Including the use of

网络编程之TCP的保活定时器Network Programming TCP s keep-alive timer -Network Programming TCP-Keepalive Timer Network Programming TCP' s keep-alive timer

TCP keepalive, TCP keepalive