public static void AcceptCallback(IAsyncResult ar)
{
// Get the socket that handles the client request.
//Socket listener = (Socket) ar.AsyncState;
//Socket handler = listener.EndAccept(ar); // hander.RemoveEndPoint にリモートEPの情報が入っている
AcceptStateObject acceptState = ar.AsyncState as AcceptStateObject;
Socket listener = acceptState.Listener;
Socket handler = listener.EndAccept(ar);
acceptState.Accepted = (handler.RemoteEndPoint as IPEndPoint).Address.ToString();
// Signal the main thread to continue.
acceptDone.Set();
// Create the state object.
StateObject state = new StateObject();
state.workSocket = handler;
handler.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0,
new AsyncCallback(ReadCallback), state);
}
private static void DoAcceptSocketCallback(IAsyncResult ar)
{
AcceptStateObject state = ar.AsyncState as AcceptStateObject;
TcpListener listener = state.Listener;
try {
Socket socket = listener.EndAcceptSocket(ar);
byte[] bytes = new byte[socket.Available];
socket.Receive(bytes);
string msg = System.Text.Encoding.UTF8.GetString(bytes);
if (msg == "ACK")
{
var remoteEP = socket.RemoteEndPoint as IPEndPoint;
state.AcceptedAddress = remoteEP.Address.ToString();
_tcpClientConnected.Set();
}
socket.Close();
} catch (Exception e) {
System.Diagnostics.Debug.WriteLine(e.Message);
}
}
public IEnumerable <string> StartListening(int portNo)
{
IPEndPoint localEP = new IPEndPoint(IPAddress.Any, portNo);
Console.WriteLine($"Local address and port : {localEP.ToString()}");
List <string> connectedList = new List <string>();
Socket listener = new Socket(localEP.Address.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
var start = DateTime.Now;
try {
listener.Bind(localEP);
listener.Listen(128);
TimeSpan ts = DateTime.Now - start;
while (ts.Seconds < 5)
{
acceptDone.Reset();
Console.WriteLine("Waiting for a connection..." + ts.Seconds.ToString());
var state = new AcceptStateObject()
{
Listener = listener,
};
var ar = listener.BeginAccept(new AsyncCallback(AcceptCallback), state);
if (acceptDone.WaitOne(1000))
{
connectedList.Add(state.Accepted);
}
ts = DateTime.Now - start;
}
} catch (Exception e) {
Console.WriteLine(e.ToString());
}
// アドレスの第4オクテットの昇順でソート
return(connectedList.OrderBy(adrs => {
int idx = adrs.LastIndexOf('.');
int adrs4th = int.Parse(adrs.Substring(idx + 1));
return adrs4th;
}));
}
// Process the client connection.
private static void DoAcceptTcpClientCallback(IAsyncResult ar)
{
AcceptStateObject state = ar.AsyncState as AcceptStateObject;
TcpListener listener = state.Listener;
try {
TcpClient client = listener.EndAcceptTcpClient(ar);
System.Threading.Thread.Sleep(_waitTime2);
NetworkStream ms = client.GetStream();
byte[] bytes = new byte[client.Available];
ms.Read(bytes, 0, client.Available);
string msg = System.Text.Encoding.UTF8.GetString(bytes);
//System.Diagnostics.Debug.WriteLine( "{0}, {1}", msg.Length, msg );
if (msg == "ACK")
{
var remoteEP = client.Client.RemoteEndPoint as IPEndPoint;
state.AcceptedAddress = remoteEP.Address.ToString();
_tcpClientConnected.Set();
}
client.Close();
} catch (Exception e) {
System.Diagnostics.Debug.WriteLine(e.Message);
}
}
// Accept one client connection asynchronously.
public IEnumerable <string> StartListening(string localHostIP, int portNo)
{
TcpListener listener = new TcpListener(IPAddress.Parse(localHostIP), portNo);
//TcpListener listener = new TcpListener( IPAddress.Any, portNo );
List <string> connectedList = new List <string>();
try {
listener.Start();
#if true
do
{
var state = new AcceptStateObject()
{
Listener = listener,
AcceptedAddress = string.Empty,
};
_tcpClientConnected.Reset();
var acceptDone = listener.BeginAcceptTcpClient(new AsyncCallback(DoAcceptTcpClientCallback), state);
if (_tcpClientConnected.WaitOne(_waitTime1))
{
connectedList.Add(state.AcceptedAddress);
//System.Diagnostics.Debug.WriteLine( state.AcceptedAddress );
}
else
{
System.Diagnostics.Debug.WriteLine("TIMEOUT");
break;
}
//System.Threading.Thread.Sleep( _waitTime2 );
} while (listener.Pending());
#else
while (true)
{
var state = new AcceptStateObject()
{
Listener = listener,
AcceptedAddress = string.Empty,
};
_tcpClientConnected.Reset();
var acceptDone = listener.BeginAcceptTcpClient(new AsyncCallback(DoAcceptTcpClientCallback), state);
if (_tcpClientConnected.WaitOne(_waitTime1))
{
connectedList.Add(state.AcceptedAddress);
}
else
{
System.Threading.Thread.Sleep(_waitTime2);
if (listener.Pending() == false)
{
System.Diagnostics.Debug.WriteLine("TIMEOUT");
break;
}
}
}
#endif
} catch (Exception e) {
System.Diagnostics.Debug.WriteLine(e.Message);
} finally {
listener.Stop();
}
// アドレスの第4オクテットの昇順でソート
return(connectedList.OrderBy(adrs =>
{
int idx = adrs.LastIndexOf('.');
return int.Parse(adrs.Substring(idx + 1));
}).Distinct());
}
