static void Main(string[] args)
{
// Receiving byte array
byte[] bytes = new byte[1024];
try
{
// Create one SocketPermission for socket access restrictions
SocketPermission permission = new SocketPermission(
NetworkAccess.Connect, // Connection permission
TransportType.Tcp, // Defines transport types
"", // Gets the IP addresses
SocketPermission.AllPorts // All ports
);
// Ensures the code to have permission to access a Socket
permission.Demand();
// Resolves a host name to an IPHostEntry instance
IPHostEntry ipHost = Dns.GetHostEntry("");
// Gets first IP address associated with a localhost
IPAddress ipAddr = ipHost.AddressList[0];
// Creates a network endpoint
IPEndPoint ipEndPoint = new IPEndPoint(ipAddr, 6000);
// Create one Socket object to setup Tcp connection
Socket sender = new Socket(
ipAddr.AddressFamily,// Specifies the addressing scheme
SocketType.Stream, // The type of socket
ProtocolType.Tcp // Specifies the protocols
);
sender.NoDelay = true; // Using the Nagle algorithm
// Establishes a connection to a remote host
sender.Connect(ipEndPoint);
Console.WriteLine("Socket connected to {0}",
sender.RemoteEndPoint.ToString());
// Sending message
//<Client Quit> is the sign for end of data
string theMessage = "Hello World!";
byte[] msg =
Encoding.Unicode.GetBytes(theMessage +"<Client Quit>");
// Sends data to a connected Socket.
int bytesSend = sender.Send(msg);
// Receives data from a bound Socket.
int bytesRec = sender.Receive(bytes);
// Converts byte array to string
theMessage = Encoding.Unicode.GetString(bytes, 0, bytesRec);
// Continues to read the data till data isn't available
while (sender.Available > 0)
{
bytesRec = sender.Receive(bytes);
theMessage += Encoding.Unicode.GetString(bytes, 0, bytesRec);
}
Console.WriteLine("The server reply: {0}", theMessage);
// Disables sends and receives on a Socket.
sender.Shutdown(SocketShutdown.Both);
//Closes the Socket connection and releases all resources
sender.Close();
}
catch (Exception ex)
{
Console.WriteLine("Exception: {0}", ex.ToString());
}
}
static void Main(string[] args)
{
// Creates one SocketPermission object for access restrictions
SocketPermission permission = new SocketPermission(
NetworkAccess.Accept, // Allowed to accept connections
TransportType.Tcp, // Defines transport types
"", // The IP addresses of local host
SocketPermission.AllPorts // Specifies all ports
);
// Listening Socket object
Socket sListener = null;
try
{
// Ensures the code to have permission to access a Socket
permission.Demand();
// Resolves a host name to an IPHostEntry instance
IPHostEntry ipHost = Dns.GetHostEntry("");
// Gets first IP address associated with a localhost
IPAddress ipAddr = ipHost.AddressList[0];
// Creates a network endpoint
IPEndPoint ipEndPoint = new IPEndPoint(ipAddr, 6000);
// Create one Socket object to listen the incoming connection
sListener = new Socket(
ipAddr.AddressFamily,
SocketType.Stream,
ProtocolType.Tcp
);
// Associates a Socket with a local endpoint
sListener.Bind(ipEndPoint);
// Places a Socket in a listening state and specifies the maximum
// Length of the pending connections queue
sListener.Listen(10);
Console.WriteLine("Waiting for a connection on port {0}",
ipEndPoint);
// Begins an asynchronous operation to accept an attempt
AsyncCallback aCallback = new AsyncCallback(AcceptCallback);
sListener.BeginAccept(aCallback, sListener);
}
catch (Exception ex)
{
Console.WriteLine("Exception: {0}", ex.ToString());
return;
}
Console.WriteLine("Press the Enter key to exit ...");
Console.ReadLine();
if (sListener.Connected)
{
sListener.Shutdown(SocketShutdown.Receive);
sListener.Close();
}
}
