/// <summary>
/// 数据接收回调函数
/// </summary>
/// <param name="ar"></param>
private void ReceiveCallback(IAsyncResult ar)
{
UdpState udpState = ar.AsyncState as UdpState;
if (ar.IsCompleted)
{
try
{
var buffer = udpState.UdpClient.EndReceive(ar, ref udpState.IpEndPoint);
udpState.Buffer = buffer;
HandleDataReceived?.Invoke(this, udpState);
}
catch (Exception ex)
{
HandleException?.Invoke(ex);
}
finally
{
_serverDone.Set();
if (IsRunning && _udpServer != null)
{
Receive();
}
}
}
}
private void HandleDatagramReceived(IAsyncResult ar)
{
if (IsRunning)
{
TcpState internalClient = (TcpState)ar.AsyncState;
NetworkStream networkStream = internalClient.NetworkStream;
int numberOfReadBytes = 0;
try
{
numberOfReadBytes = networkStream.EndRead(ar);
}
catch
{
numberOfReadBytes = 0;
}
if (numberOfReadBytes == 0)
{
// 连接已关闭
lock (this.clients)
{
this.clients.Remove(internalClient);
HandleClientDisconnected?.Invoke(internalClient);
return;
}
}
// 接收到字节和触发事件通知
byte[] receivedBytes = new byte[numberOfReadBytes];
Buffer.BlockCopy(internalClient.Buffer, 0, receivedBytes, 0, numberOfReadBytes);
HandleDataReceived?.Invoke(internalClient, receivedBytes);
HandleTextReceived?.Invoke(internalClient, this.Encoding.GetString(receivedBytes, 0, receivedBytes.Length));
// 继续侦听TCP数据报包
networkStream.BeginRead(internalClient.Buffer, 0, internalClient.Buffer.Length, HandleDatagramReceived, internalClient);
}
}
