/// <summary>
/// Create a new DnsServer object
/// </summary>
public TcpDnsRequestListener(DnsRecordProvider dnsRecordProvider, int defaultPoolSize = 5000, int port = 53) : base(dnsRecordProvider, port)
{
this.listenerSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
this.connectionsSemaphore = new Semaphore(defaultPoolSize, defaultPoolSize);
this.listenerSocket.ReceiveBufferSize = 20000000; //~20 megabytes
// Initialize the SocketAsyncEventArgs pool
for (int i = 0; i < defaultPoolSize; i++)
{
var socketEventArg = new SocketAsyncEventArgs();
socketEventArg.Completed += TcpSocketEventArg_Completed;
socketEventArg.RemoteEndPoint = new IPEndPoint(IPAddress.Any, this.Port);
socketEventArg.SetBuffer(new byte[4096], 0, 4096);
// Connect with a request
var request = new DnsRequestListenerSession(this, socketEventArg);
socketEventArg.UserToken = request;
// Add to the pool
this._socketAsyncEventArgsPool.Push(socketEventArg);
}
}
/// <summary>
/// Create a new DnsServer object
/// </summary>
public TcpDnsRequestListener(DnsRecordProvider dnsRecordProvider, int defaultPoolSize = 5000, int port = 53) : base(dnsRecordProvider, port)
{
this.listenerSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
this.connectionsSemaphore = new Semaphore(defaultPoolSize, defaultPoolSize);
this.listenerSocket.ReceiveBufferSize = 20000000; //~20 megabytes
// Initialize the SocketAsyncEventArgs pool
for (int i = 0; i < defaultPoolSize; i++)
{
var socketEventArg = new SocketAsyncEventArgs();
socketEventArg.Completed += TcpSocketEventArg_Completed;
socketEventArg.RemoteEndPoint = new IPEndPoint(IPAddress.Any, this.Port);
socketEventArg.SetBuffer(new byte[4096], 0, 4096);
// Connect with a request
var request = new DnsRequestListenerSession(this, socketEventArg);
socketEventArg.UserToken = request;
// Add to the pool
this._socketAsyncEventArgsPool.Push(socketEventArg);
}
}
/// <summary> /// Send the response back to the client /// </summary> /// <param name="request"></param> /// <param name="bytesWritten"></param> public abstract void SendResponse(DnsRequestListenerSession request, int bytesWritten);
public override void SendResponse(DnsRequestListenerSession request, int bytesWritten)
{
request.SocketAsyncEventArgs.SetBuffer(0, bytesWritten);
request.Socket.SendAsync(request.SocketAsyncEventArgs);
}
public override void SendResponse(DnsRequestListenerSession request, int bytesWritten)
{
request.SocketAsyncEventArgs.SetBuffer(0, bytesWritten);
this.listenerSocket.SendToAsync(request.SocketAsyncEventArgs);
}
/// <summary> /// Send the response back to the client /// </summary> /// <param name="request"></param> /// <param name="bytesWritten"></param> public abstract void SendResponse(DnsRequestListenerSession request, int bytesWritten);