TCP同步通信，心跳包怎么具体实现啊
TCP同步通信，心跳包怎么具体实现啊
求能详细点的啊
[解决办法]
最好的办法是把它封装一下，然后在客户端和服务器端调用的时候都设置就行。
public static class SocketExtensions
{
//found at http://www.extensionmethod.net/Details.aspx?ID=271, slightly modified
/// <summary>
/// Using IOControl code to configue socket KeepAliveValues for line disconnection detection(because default is toooo slow)
/// </summary>
/// <param name="instance">A socket instance</param>
/// <param name="KeepAliveTime">The keep alive time. (ms)</param>
/// <param name="KeepAliveInterval">The keep alive interval. (ms)</param>
public static void SetSocketKeepAliveValues(this Socket instance, int KeepAliveTime, int KeepAliveInterval)
{
//KeepAliveTime: default value is 2hr
//KeepAliveInterval: default value is 1s and Detect 5 times
//the native structure
//struct tcp_keepalive {
//ULONG onoff;
//ULONG keepalivetime;
//ULONG keepaliveinterval;
//};
uint dummy = 0; //lenth = 4
int length = Marshal.SizeOf(dummy);
byte[] inOptionValues = new byte[length * 3]; //size = lenth * 3 = 12
bool OnOff = true;
BitConverter.GetBytes((uint)(OnOff ? 1 : 0)).CopyTo(inOptionValues, 0);
BitConverter.GetBytes((uint)KeepAliveTime).CopyTo(inOptionValues, length);
BitConverter.GetBytes((uint)KeepAliveInterval).CopyTo(inOptionValues, length * 2);
// of course there are other ways to marshal up this byte array, this is just one way
// call WSAIoctl via IOControl
// .net 1.1 type
//int SIO_KEEPALIVE_VALS = -1744830460; //(or 0x98000004)
//socket.IOControl(SIO_KEEPALIVE_VALS, inOptionValues, null);
// .net 3.5 type
instance.IOControl(IOControlCode.KeepAliveValues, inOptionValues, null);
}
}
socketClient.Connect(ServerIP, ServerPort);
socketClient.SetSocketKeepAliveValues(ConstTools.KeepAliveTime, ConstTools.KeepAliveInterval);
var socketClient = socketServer.EndAccept(ar);
socketClient.SetSocketKeepAliveValues(ConstTools.KeepAliveTime, ConstTools.KeepAliveInterval);
