private static void asyncReceiveCallback(IAsyncResult asyncResult)
{
AsyncStateData rcvData = asyncResult.AsyncState as AsyncStateData;
int nRecv = rcvData.Socket.EndReceive(asyncResult);
string txt = Encoding.UTF8.GetString(rcvData.Buffer, 0, nRecv);
byte[] sendBytes = Encoding.UTF8.GetBytes("Hello: " + txt);
rcvData.Socket.BeginSend(sendBytes, 0, sendBytes.Length,
SocketFlags.None, asyncSendCallback, rcvData.Socket);
}
private static void serverFunc(object obj)
{
using (Socket srvSocket =
new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp))
{
IPEndPoint endPoint = new IPEndPoint(IPAddress.Any, 11200);
srvSocket.Bind(endPoint);
srvSocket.Listen(10);
while (true)
{
Socket clntSocket = srvSocket.Accept();
AsyncStateData data = new AsyncStateData();
data.Buffer = new byte[1024];
data.Socket = clntSocket;
clntSocket.BeginReceive(data.Buffer, 0, data.Buffer.Length,
SocketFlags.None, asyncReceiveCallback, data);
}
}
}