C# Socket.Shutdown抛出SocketException
我正在尝试为我的项目实现异步套接字。这是密码C# Socket.Shutdown抛出SocketException,c#,sockets,serversocket,asyncsocket,C#,Sockets,Serversocket,Asyncsocket,我正在尝试为我的项目实现异步套接字。这是密码 public void Start(int listeningPort) { var ipHostInfo = Dns.Resolve(Dns.GetHostName()); var ipAddress = ipHostInfo.AddressList[0]; var localEndPoint = new IPEndPoint(ipAddress, listeningPort);
public void Start(int listeningPort)
{
var ipHostInfo = Dns.Resolve(Dns.GetHostName());
var ipAddress = ipHostInfo.AddressList[0];
var localEndPoint = new IPEndPoint(ipAddress, listeningPort);
_listener = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
_listener.Bind(localEndPoint);
_listener.Listen(3000);
Started = true;
Task.Factory.StartNew(() =>
{
while (Started)
{
allDone.Reset();
_listener.BeginAccept(AcceptCallback, _listener);
allDone.WaitOne();
}
});
}
public void Stop()
{
Started = false;
_listener.Shutdown(SocketShutdown.Both); //<-- throws SocketException
_listener.Close(2000);
_listener = null;
}
public void Kick(IClient client)
{
try
{
Clients.Remove(client);
client.Socket.Shutdown(SocketShutdown.Both);
client.Socket.Close();
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
}
}
private void AcceptCallback(IAsyncResult ar)
{
Socket handler = null;
try
{
allDone.Set();
var listener = (Socket) ar.AsyncState;
handler = listener.EndAccept(ar);
var client = new Client(this, handler);
Clients.Add(client);
var state = new StateObject();
state.Socket = handler;
handler.BeginReceive(state.Buffer, 0, StateObject.BufferSize, 0, ReadCallback, state);
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
var client = ClientBySocket(handler);
if(handler != null && client != null) Kick(client);
}
}
private void ReadCallback(IAsyncResult ar)
{
Socket handler = null;
try
{
var state = (StateObject) ar.AsyncState;
handler = state.Socket;
var bytesRead = handler.EndReceive(ar);
if (bytesRead > 0)
{
if (Received != null)
{
var buff = new byte[bytesRead];
if (buff[0] == 0)
{
Stop();
}
return;
Array.Copy(state.Buffer, buff, bytesRead);
Debug.WriteLine(Encoding.UTF8.GetString(buff));
try
{
Received(this, new ReceiveArgs(buff));
}
catch(Exception ex)
{
Debug.WriteLine(ex.Message);
}
}
}
handler.BeginReceive(state.Buffer, 0, StateObject.BufferSize, 0, ReadCallback, state);
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
var client = ClientBySocket(handler);
if (handler != null && client != null) Kick(client);
}
}
public void启动(int-listingport)
{
var ipHostInfo=Dns.Resolve(Dns.GetHostName());
var ipAddress=ipHostInfo.AddressList[0];
var localEndPoint=新的IPEndPoint(ipAddress,listeningPort);
_侦听器=新套接字(AddressFamily.InterNetwork、SocketType.Stream、ProtocolType.Tcp);
_Bind(localEndPoint);
_听,听(3000);
开始=真;
Task.Factory.StartNew(()=>
{
while(启动)
{
全部完成。重置();
_beginacept(AcceptCallback,_listener);
全部完成。WaitOne();
}
});
}
公共停车场()
{
开始=错误;
_listener.Shutdown(SocketShutdown.Both);//0)
{
如果(已接收!=null)
{
var buff=新字节[bytesRead];
if(buff[0]==0)
{
停止();
}
返回;
复制(state.Buffer、buff、bytesRead);
Debug.WriteLine(Encoding.UTF8.GetString(buff));
尝试
{
接收(此,新接收参数(buff));
}
捕获(例外情况除外)
{
Debug.WriteLine(例如消息);
}
}
}
BeginReceive(state.Buffer,0,StateObject.BufferSize,0,ReadCallback,state);
}
捕获(例外情况除外)
{
Debug.WriteLine(例如消息);
var client=ClientBySocket(处理程序);
如果(handler!=null&&client!=null)踢(client);
}
}
但每次我调用Stop(这反过来又调用shutdown)(无论客户端是否连接),Socket.shutdown都会抛出带有消息的SocketException
其他信息:发送或接收数据的请求被取消
不允许,因为套接字未连接并且(在通过
数据报套接字(使用sendto调用)未提供地址
我真的被困在这里了。有人知道我做错了什么吗?您的监听插座未连接。我认为这条信息很好地说明了这一点。每次您接受一个连接时,都会得到一个独立的新套接字。原始插座从未连接到任何东西 只要别叫关机就行了
顺便说一句,您的Accept循环正在使用异步IO,然后等待它完成。这毫无意义。使用同步版本。1。但我应该如何停止服务器套接字?我是否应该单独关闭每个套接字(侦听器除外)?2.关于异步IO。如果我在EndAccept之后调用BeginAccept会更好吗?那样的话,我就不需要手动重置事件了,对吗。只需关闭侦听器。它独立于所有其他插座。在未连接的插座上关机应该打开什么?!没有要发送或接收的数据。2.您可以选择:不等待的异步IO或同步IO。混合很少有意义。我建议尽可能使用同步IO,因为它更容易编程和调试。如果你不得不问,你可能应该去同步。