/// <summary>
/// Initialize a new instance of the <see cref="TcpListener"/> class.
/// </summary>
/// <param name="port">
/// It's the local port where the connection requests will be listened.
/// </param>
public TcpListener(int port)
{
_localInterface = "localhost";
if (!NetUtilities.IsValidTcpPort(port))
{
throw new ArgumentOutOfRangeException("port");
}
_port = port;
}
/// <summary>
/// Initialize a new instance of the <see cref="TcpListener"/> class,
/// ready to listen requests over a given IP address and port.
/// </summary>
/// <param name="localAddress">
/// It's the local address where the connection requests will be listened.
/// </param>
/// <param name="port">
/// It's the local port where the connection requests will be listened.
/// </param>
public TcpListener(IPAddress localAddress, int port)
{
if (localAddress == null)
{
throw new ArgumentNullException("localAddress");
}
if (!NetUtilities.IsValidTcpPort(port))
{
throw new ArgumentOutOfRangeException("port");
}
CreateServerSocket(new IPEndPoint(localAddress, port));
}
/// <summary>
/// Start to listen connection requests.
/// </summary>
public void Start()
{
lock (this) {
if (_listening)
{
return;
}
if (_localEndPoint == null)
{
// Local end point unspecified, try to solve it trought
// Port and LocalInterface properties.
if (_localInterface == null)
{
throw new MessagingException("Invalid local interface.");
}
if (!NetUtilities.IsValidTcpPort(_port))
{
throw new MessagingException("Invalid port number.");
}
#if NET20
IPHostEntry hostEntry = null;
IPAddress addr = null;
if (IPAddress.TryParse(_localInterface, out addr))
{
// Create server socket, over the first located address.
_localEndPoint = new IPEndPoint(addr, _port);
}
else
{
hostEntry = Dns.GetHostEntry(_localInterface);
if (hostEntry.AddressList.Length == 0)
{
throw new MessagingException("Can't resolve local interface name.");
}
// Create server socket, over the first located address.
_localEndPoint = new IPEndPoint(hostEntry.AddressList[0], _port);
}
#else
IPHostEntry hostEntry = Dns.Resolve(_localInterface);
if (hostEntry.AddressList.Length == 0)
{
throw new MessagingException("Can't resolve local interface name.");
}
// Create server socket, over the first located address.
_localEndPoint = new IPEndPoint(hostEntry.AddressList[0], _port);
#endif
}
if (_socket == null)
{
CreateServerSocket(_localEndPoint);
}
// Bind and start listening.
_socket.Bind(_localEndPoint);
_socket.Listen(10);
_listening = true;
// Start an asynchronous Accept operation.
_socket.BeginAccept(new AsyncCallback(AsyncAcceptRequestHandler), _socket);
}
}