Sockets Question

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  • John F
    #1

    Sockets Question

    Hello All,

    My question is about the proper way to setup a listening socket. I have the
    following code that works fine:
    IPAddress localAddr = Dns.GetHostEntr y(strHostName). AddressList[0];

    Int32 port = 25001;
    TcpListener tcpServerListen er = new TcpListener(por t);
    tcpServerListen er.Start();
    Socket serverSocket = tcpServerListen er.AcceptSocket ();

    However, I've seen other code out there that looks like this:
    this.listenerSo cket = new Socket(AddressF amily.InterNetw ork,
    SocketType.Stre am, ProtocolType.Tc p);
    this.listenerSo cket.Bind( new IPEndPoint(this .serverIP , this.serverPort ));
    this.listenerSo cket.Listen(200 );

    Is it necessary to specify the AddressFamily and SocketType or is my way ok?

    Thanks,
    John
    Tags: None
    • Dave Sexton
      #2
      Re: Sockets Question

      Hi John,

      TcpListener wraps a listening, streaming Tcp Socket and it aggregates some of
      the more common operations into single method calls, so it's much easier to
      code against.

      The code you have supplied that uses TcpListener does something different than
      the code you have supplied that uses Socket directly:
      Socket serverSocket = tcpServerListen er.AcceptSocket ();
      This line blocks until it can acquire the first client connection, returned as
      a different Socket than the one TcpListener uses internally

      And the Socket code has something different as well:
      this.listenerSo cket.Bind( new IPEndPoint(this .serverIP , this.serverPort ));
      Binds the Socket to a specific IP as well as a specific port


      Check out the TcpListener.Acc eptTcpClient() method. Instead of AcceptSocket()
      returning a Socket, it returns TcpClient, which wraps the client Socket
      connection making it easier to work with.

      --
      Dave Sexton

      "John F" <jf@rt.comwro te in message
      news:CCE6A78A-83C5-41F1-A765-9B78C40ABEF1@mi crosoft.com...
      Hello All,
      >
      My question is about the proper way to setup a listening socket. I have the
      following code that works fine:
      IPAddress localAddr = Dns.GetHostEntr y(strHostName). AddressList[0];
      >
      Int32 port = 25001;
      TcpListener tcpServerListen er = new TcpListener(por t);
      tcpServerListen er.Start();
      Socket serverSocket = tcpServerListen er.AcceptSocket ();
      >
      However, I've seen other code out there that looks like this:
      this.listenerSo cket = new Socket(AddressF amily.InterNetw ork,
      SocketType.Stre am, ProtocolType.Tc p);
      this.listenerSo cket.Bind( new IPEndPoint(this .serverIP ,
      this.serverPort ));
      this.listenerSo cket.Listen(200 );
      >
      Is it necessary to specify the AddressFamily and SocketType or is my way ok?
      >
      Thanks,
      John

        Comment

        • John F
          #3
          Re: Sockets Question

          Thanks Dave. I will check out the AcceptTcpClient method.
          --
          John F


          "Dave Sexton" wrote:
          Hi John,
          >
          TcpListener wraps a listening, streaming Tcp Socket and it aggregates some of
          the more common operations into single method calls, so it's much easier to
          code against.
          >
          The code you have supplied that uses TcpListener does something different than
          the code you have supplied that uses Socket directly:
          >
          Socket serverSocket = tcpServerListen er.AcceptSocket ();
          >
          This line blocks until it can acquire the first client connection, returned as
          a different Socket than the one TcpListener uses internally
          >
          And the Socket code has something different as well:
          >
          this.listenerSo cket.Bind( new IPEndPoint(this .serverIP , this.serverPort ));
          >
          Binds the Socket to a specific IP as well as a specific port
          >
          >
          Check out the TcpListener.Acc eptTcpClient() method. Instead of AcceptSocket()
          returning a Socket, it returns TcpClient, which wraps the client Socket
          connection making it easier to work with.
          >
          --
          Dave Sexton
          >
          "John F" <jf@rt.comwro te in message
          news:CCE6A78A-83C5-41F1-A765-9B78C40ABEF1@mi crosoft.com...
          Hello All,

          My question is about the proper way to setup a listening socket. I have the
          following code that works fine:
          IPAddress localAddr = Dns.GetHostEntr y(strHostName). AddressList[0];

          Int32 port = 25001;
          TcpListener tcpServerListen er = new TcpListener(por t);
          tcpServerListen er.Start();
          Socket serverSocket = tcpServerListen er.AcceptSocket ();

          However, I've seen other code out there that looks like this:
          this.listenerSo cket = new Socket(AddressF amily.InterNetw ork,
          SocketType.Stre am, ProtocolType.Tc p);
          this.listenerSo cket.Bind( new IPEndPoint(this .serverIP ,
          this.serverPort ));
          this.listenerSo cket.Listen(200 );

          Is it necessary to specify the AddressFamily and SocketType or is my way ok?

          Thanks,
          John
          >
          >
          >

            Comment

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