TcpListener TcpListener TcpListener TcpListener Class

Definición

Realiza escuchas para conexiones de clientes de red TCP.Listens for connections from TCP network clients.

public ref class TcpListener
public class TcpListener
type TcpListener = class
Public Class TcpListener
Herencia
TcpListenerTcpListenerTcpListenerTcpListener

Ejemplos

En el ejemplo de código siguiente se crea un TcpListener.The following code example creates a TcpListener.

#using <System.dll>

using namespace System;
using namespace System::IO;
using namespace System::Net;
using namespace System::Net::Sockets;
using namespace System::Text;
using namespace System::Threading;
void main()
{
   try
   {
      
      // Set the TcpListener on port 13000.
      Int32 port = 13000;
      IPAddress^ localAddr = IPAddress::Parse( "127.0.0.1" );
      
      // TcpListener* server = new TcpListener(port);
      TcpListener^ server = gcnew TcpListener( localAddr,port );
      
      // Start listening for client requests.
      server->Start();
      
      // Buffer for reading data
      array<Byte>^bytes = gcnew array<Byte>(256);
      String^ data = nullptr;
      
      // Enter the listening loop.
      while ( true )
      {
         Console::Write( "Waiting for a connection... " );
         
         // Perform a blocking call to accept requests.
         // You could also user server.AcceptSocket() here.
         TcpClient^ client = server->AcceptTcpClient();
         Console::WriteLine( "Connected!" );
         data = nullptr;
         
         // Get a stream Object* for reading and writing
         NetworkStream^ stream = client->GetStream();
         Int32 i;
         
         // Loop to receive all the data sent by the client.
         while ( i = stream->Read( bytes, 0, bytes->Length ) )
         {
            
            // Translate data bytes to a ASCII String*.
            data = Text::Encoding::ASCII->GetString( bytes, 0, i );
            Console::WriteLine( "Received: {0}", data );
            
            // Process the data sent by the client.
            data = data->ToUpper();
            array<Byte>^msg = Text::Encoding::ASCII->GetBytes( data );
            
            // Send back a response.
            stream->Write( msg, 0, msg->Length );
            Console::WriteLine( "Sent: {0}", data );
         }
         
         // Shutdown and end connection
         client->Close();
      }
   }
   catch ( SocketException^ e ) 
   {
      Console::WriteLine( "SocketException: {0}", e );
   }

   Console::WriteLine( "\nHit enter to continue..." );
   Console::Read();
}


using System;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Text;

class MyTcpListener
{
  public static void Main()
  { 
    TcpListener server=null;   
    try
    {
      // Set the TcpListener on port 13000.
      Int32 port = 13000;
      IPAddress localAddr = IPAddress.Parse("127.0.0.1");
      
      // TcpListener server = new TcpListener(port);
      server = new TcpListener(localAddr, port);

      // Start listening for client requests.
      server.Start();
         
      // Buffer for reading data
      Byte[] bytes = new Byte[256];
      String data = null;

      // Enter the listening loop.
      while(true) 
      {
        Console.Write("Waiting for a connection... ");
        
        // Perform a blocking call to accept requests.
        // You could also user server.AcceptSocket() here.
        TcpClient client = server.AcceptTcpClient();            
        Console.WriteLine("Connected!");

        data = null;

        // Get a stream object for reading and writing
        NetworkStream stream = client.GetStream();

        int i;

        // Loop to receive all the data sent by the client.
        while((i = stream.Read(bytes, 0, bytes.Length))!=0) 
        {   
          // Translate data bytes to a ASCII string.
          data = System.Text.Encoding.ASCII.GetString(bytes, 0, i);
          Console.WriteLine("Received: {0}", data);
       
          // Process the data sent by the client.
          data = data.ToUpper();

          byte[] msg = System.Text.Encoding.ASCII.GetBytes(data);

          // Send back a response.
          stream.Write(msg, 0, msg.Length);
          Console.WriteLine("Sent: {0}", data);            
        }
         
        // Shutdown and end connection
        client.Close();
      }
    }
    catch(SocketException e)
    {
      Console.WriteLine("SocketException: {0}", e);
    }
    finally
    {
       // Stop listening for new clients.
       server.Stop();
    }

      
    Console.WriteLine("\nHit enter to continue...");
    Console.Read();
  }   
}
Imports System
Imports System.IO
Imports System.Net
Imports System.Net.Sockets
Imports System.Text
Imports Microsoft.VisualBasic


Class MyTcpListener

    Public Shared Sub Main()

	Dim server As TcpListener
	server=nothing
        Try
            ' Set the TcpListener on port 13000.
         Dim port As Int32 = 13000
         Dim localAddr As IPAddress = IPAddress.Parse("127.0.0.1")

         server = New TcpListener(localAddr, port)
         
         ' Start listening for client requests.
         server.Start()
         
         ' Buffer for reading data
            Dim bytes(1024) As Byte
            Dim data As String = Nothing
         
         ' Enter the listening loop.
         While True
            Console.Write("Waiting for a connection... ")
            
            ' Perform a blocking call to accept requests.
            ' You could also user server.AcceptSocket() here.
            Dim client As TcpClient = server.AcceptTcpClient()
            Console.WriteLine("Connected!")
            
            data = Nothing
            
            ' Get a stream object for reading and writing
            Dim stream As NetworkStream = client.GetStream()
            
            Dim i As Int32
            
            ' Loop to receive all the data sent by the client.
            i = stream.Read(bytes, 0, bytes.Length)
            While (i <> 0) 
               ' Translate data bytes to a ASCII string.
               data = System.Text.Encoding.ASCII.GetString(bytes, 0, i)
                    Console.WriteLine("Received: {0}", data)
               
               ' Process the data sent by the client.
               data = data.ToUpper()
                    Dim msg As Byte() = System.Text.Encoding.ASCII.GetBytes(data)
               
               ' Send back a response.
               stream.Write(msg, 0, msg.Length)
                    Console.WriteLine("Sent: {0}", data)
              
               i = stream.Read(bytes, 0, bytes.Length)

            End While
            
            ' Shutdown and end connection
            client.Close()
         End While
      Catch e As SocketException
         Console.WriteLine("SocketException: {0}", e)
      Finally
         server.Stop()
      End Try
      
      Console.WriteLine(ControlChars.Cr + "Hit enter to continue....")
      Console.Read()
   End Sub 'Main

End Class 'MyTcpListener 

Consulte TcpClient para obtener un ejemplo de cliente.See TcpClient for a client example.

Comentarios

La TcpListener clase proporciona métodos sencillos que escuchan y aceptan las solicitudes de conexión entrantes en modo de bloqueo sincrónico.The TcpListener class provides simple methods that listen for and accept incoming connection requests in blocking synchronous mode. Puede usar un TcpClient o un Socket para conectarse con un TcpListener.You can use either a TcpClient or a Socket to connect with a TcpListener. Crear un TcpListener mediante un IPEndPoint, una dirección IP Local y el número de puerto o simplemente un número de puerto.Create a TcpListener using an IPEndPoint, a Local IP address and port number, or just a port number. Especificar Any para la dirección IP local y 0 para el número de puerto local si desea que el proveedor de servicios subyacente para asignar esos valores para usted.Specify Any for the local IP address and 0 for the local port number if you want the underlying service provider to assign those values for you. Si decide hacerlo, puede usar el LocalEndpoint propiedad para identificar la información asignada, una vez que se ha conectado el socket.If you choose to do this, you can use the LocalEndpoint property to identify the assigned information, after the socket has connected.

Use el Start método para empezar a escuchar las solicitudes de conexión entrantes.Use the Start method to begin listening for incoming connection requests. Start se pondrán en cola las conexiones entrantes hasta que llame a la Stop método o se ha puesto en cola MaxConnections.Start will queue incoming connections until you either call the Stop method or it has queued MaxConnections. Usar AcceptSocket o AcceptTcpClient para extraer una conexión desde la cola de solicitudes de conexión entrante.Use either AcceptSocket or AcceptTcpClient to pull a connection from the incoming connection request queue. Estos dos métodos se bloquearán.These two methods will block. Si desea evitar el bloqueo, puede usar el Pending método primero para determinar si las solicitudes de conexión están disponibles en la cola.If you want to avoid blocking, you can use the Pending method first to determine if connection requests are available in the queue.

Llame a la Stop método para cerrar el TcpListener.Call the Stop method to close the TcpListener.

Nota

El Stop método no cierra cualquier conexión aceptada.The Stop method does not close any accepted connections. Usted es responsable de cerrarlas por separado.You are responsible for closing these separately.

Constructores

TcpListener(Int32) TcpListener(Int32) TcpListener(Int32) TcpListener(Int32)

Inicializa una nueva instancia de la clase TcpListener que escucha en el puerto especificado.Initializes a new instance of the TcpListener class that listens on the specified port.

TcpListener(IPAddress, Int32) TcpListener(IPAddress, Int32) TcpListener(IPAddress, Int32) TcpListener(IPAddress, Int32)

Inicializa una nueva instancia de la clase TcpListener que escucha los intentos de conexión entrantes en la dirección IP local y el número de puerto especificados.Initializes a new instance of the TcpListener class that listens for incoming connection attempts on the specified local IP address and port number.

TcpListener(IPEndPoint) TcpListener(IPEndPoint) TcpListener(IPEndPoint) TcpListener(IPEndPoint)

Inicializa una nueva instancia de la clase TcpListener con el extremo local especificado.Initializes a new instance of the TcpListener class with the specified local endpoint.

Propiedades

Active Active Active Active

Obtiene un valor que indica si TcpListener escucha activamente las conexiones de clientes.Gets a value that indicates whether TcpListener is actively listening for client connections.

ExclusiveAddressUse ExclusiveAddressUse ExclusiveAddressUse ExclusiveAddressUse

Obtiene o establece un valor Boolean que especifica si TcpListener permite a sólo un socket subyacente escuchar en un puerto concreto.Gets or sets a Boolean value that specifies whether the TcpListener allows only one underlying socket to listen to a specific port.

LocalEndpoint LocalEndpoint LocalEndpoint LocalEndpoint

Obtiene el objeto EndPoint subyacente del objeto TcpListener actual.Gets the underlying EndPoint of the current TcpListener.

Server Server Server Server

Obtiene el objeto de red Socket subyacente.Gets the underlying network Socket.

Métodos

AcceptSocket() AcceptSocket() AcceptSocket() AcceptSocket()

Acepta una solicitud de conexión pendiente.Accepts a pending connection request.

AcceptSocketAsync() AcceptSocketAsync() AcceptSocketAsync() AcceptSocketAsync()

Acepta una solicitud de conexión pendiente como una operación asincrónica.Accepts a pending connection request as an asynchronous operation.

AcceptTcpClient() AcceptTcpClient() AcceptTcpClient() AcceptTcpClient()

Acepta una solicitud de conexión pendiente.Accepts a pending connection request.

AcceptTcpClientAsync() AcceptTcpClientAsync() AcceptTcpClientAsync() AcceptTcpClientAsync()

Acepta una solicitud de conexión pendiente como una operación asincrónica.Accepts a pending connection request as an asynchronous operation.

AllowNatTraversal(Boolean) AllowNatTraversal(Boolean) AllowNatTraversal(Boolean) AllowNatTraversal(Boolean)

Habilita o deshabilita NAT (Traducción de direcciones de red) transversal en una instancia de TcpListener.Enables or disables Network Address Translation (NAT) traversal on a TcpListener instance.

BeginAcceptSocket(AsyncCallback, Object) BeginAcceptSocket(AsyncCallback, Object) BeginAcceptSocket(AsyncCallback, Object) BeginAcceptSocket(AsyncCallback, Object)

Comienza una operación asincrónica para aceptar un intento de conexión entrante.Begins an asynchronous operation to accept an incoming connection attempt.

BeginAcceptTcpClient(AsyncCallback, Object) BeginAcceptTcpClient(AsyncCallback, Object) BeginAcceptTcpClient(AsyncCallback, Object) BeginAcceptTcpClient(AsyncCallback, Object)

Comienza una operación asincrónica para aceptar un intento de conexión entrante.Begins an asynchronous operation to accept an incoming connection attempt.

Create(Int32) Create(Int32) Create(Int32) Create(Int32)

Crea una nueva instancia de TcpListener para realizar escuchas en el puerto especificado.Creates a new TcpListener instance to listen on the specified port.

EndAcceptSocket(IAsyncResult) EndAcceptSocket(IAsyncResult) EndAcceptSocket(IAsyncResult) EndAcceptSocket(IAsyncResult)

Acepta asincrónicamente un intento de conexión entrante y crea un nuevo objeto Socket para controlar la comunicación con el host remoto.Asynchronously accepts an incoming connection attempt and creates a new Socket to handle remote host communication.

EndAcceptTcpClient(IAsyncResult) EndAcceptTcpClient(IAsyncResult) EndAcceptTcpClient(IAsyncResult) EndAcceptTcpClient(IAsyncResult)

Acepta asincrónicamente un intento de conexión entrante y crea un nuevo objeto TcpClient para controlar la comunicación con el host remoto.Asynchronously accepts an incoming connection attempt and creates a new TcpClient to handle remote host communication.

Equals(Object) Equals(Object) Equals(Object) Equals(Object)

Determina si el objeto especificado es igual al objeto actual.Determines whether the specified object is equal to the current object.

(Inherited from Object)
Finalize() Finalize() Finalize() Finalize()

Libera los recursos utilizados por la clase TcpListener.Frees resources used by the TcpListener class.

GetHashCode() GetHashCode() GetHashCode() GetHashCode()

Sirve como la función hash predeterminada.Serves as the default hash function.

(Inherited from Object)
GetType() GetType() GetType() GetType()

Obtiene el Type de la instancia actual.Gets the Type of the current instance.

(Inherited from Object)
MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

Crea una copia superficial del objeto Object actual.Creates a shallow copy of the current Object.

(Inherited from Object)
Pending() Pending() Pending() Pending()

Determina si existen solicitudes de conexión pendientes.Determines if there are pending connection requests.

Start() Start() Start() Start()

Comienza la escucha de solicitudes de conexión entrantes.Starts listening for incoming connection requests.

Start(Int32) Start(Int32) Start(Int32) Start(Int32)

Comienza la escucha de solicitudes de conexión entrantes en un número máximo de conexión pendiente.Starts listening for incoming connection requests with a maximum number of pending connection.

Stop() Stop() Stop() Stop()

Cierra el agente de escucha.Closes the listener.

ToString() ToString() ToString() ToString()

Devuelve una cadena que representa el objeto actual.Returns a string that represents the current object.

(Inherited from Object)

Seguridad

SocketPermission
Para establecer una conexión saliente o Aceptar una solicitud entrante.to establish an outgoing connection or accept an incoming request.

Se aplica a

Consulte también: