public bool reserve(int port)
{
try
{
clientList = new List <Socket>();
localSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
IPEndPoint localEndpoint = new IPEndPoint(IPAddress.Any, port);
ConnectionObject co = new ConnectionObject
{
workingBytes = new byte[BUFFER]
};
localSocket.Bind(localEndpoint);
localSocket.Listen(100);
localSocket.BeginAccept(new AsyncCallback(OnAccept), co);
return(true);
}
catch (Exception exc)
{
removeUnusedSocket();
ExceptionRaised(this, new ExceptionRaiseEventArgs(exc));
return(false);
}
}
// tcp async call back
private void OnAccept(IAsyncResult ar)
{
try
{
if (ar.IsCompleted)
{
ConnectionObject recObj = ar.AsyncState as ConnectionObject;
recObj.clientSocket = localSocket.EndAccept(ar);
localSocket.BeginAccept(new AsyncCallback(OnAccept), recObj);
ConnectionObject co = new ConnectionObject
{
workingBytes = new byte[BUFFER],
clientSocket = recObj.clientSocket
};
clientList.Add(recObj.clientSocket);
recObj.clientSocket.BeginReceive(
co.workingBytes,
0,
co.workingBytes.Length,
SocketFlags.None, new AsyncCallback(OnReceive),
co);
}
}
catch (Exception exc)
{
removeUnusedSocket();
ExceptionRaised(this, new ExceptionRaiseEventArgs(exc));
}
}
public bool send(byte[] data)
{
try
{
if (localSocket == null)
{
return(false);
}
else
{
ConnectionObject co = new ConnectionObject
{
workingBytes = data,
clientSocket = localSocket
};
if (clientList == null)
{
localSocket.BeginSend(data, 0, data.Length, SocketFlags.None, new AsyncCallback(OnSend), co);
}
else
{
foreach (var client in clientList)
{
co = new ConnectionObject
{
workingBytes = data,
clientSocket = client
};
client.BeginSend(data, 0, data.Length, SocketFlags.None, new AsyncCallback(OnSend), co);
}
}
}
return(true);
}
catch (Exception exc)
{
removeUnusedSocket();
ExceptionRaised(this, new ExceptionRaiseEventArgs(exc));
return(false);
}
}
public bool sendBySpecificSocket(byte[] data, Socket sockAddr)
{
try
{
ConnectionObject co = new ConnectionObject
{
workingBytes = data,
clientSocket = sockAddr
};
sockAddr.BeginSend(data, 0, data.Length, SocketFlags.None, new AsyncCallback(OnSend), co);
return(true);
}
catch (Exception exc)
{
removeUnusedSocket();
ExceptionRaised(this, new ExceptionRaiseEventArgs(exc));
return(false);
}
}
public bool connect(IPEndPoint remoteEndpoint)
{
try
{
localSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
ConnectionObject co = new ConnectionObject
{
workingBytes = new byte[BUFFER],
clientSocket = localSocket
};
localSocket.BeginConnect(remoteEndpoint, new AsyncCallback(OnConnect), co);
return(true);
}
catch (Exception exc)
{
removeUnusedSocket();
ExceptionRaised(this, new ExceptionRaiseEventArgs(exc));
return(false);
}
}
private void OnReceive(IAsyncResult ar)
{
try
{
if (ar.IsCompleted)
{
ConnectionObject recObj = ar.AsyncState as ConnectionObject;
Socket workingSock = recObj.clientSocket;
int receivedBytes = workingSock.EndReceive(ar);
byte[] recBytes = recObj.workingBytes.Take(receivedBytes).ToArray();
ReceiveCompleted(this, new ReceiveCompletedEventArgs(recBytes, workingSock));
ConnectionObject co = new ConnectionObject
{
workingBytes = new byte[BUFFER],
clientSocket = workingSock
};
workingSock.BeginReceive(co.workingBytes, 0, co.workingBytes.Length, SocketFlags.None, new AsyncCallback(OnReceive), co);
}
}
catch (Exception exc)
{
removeUnusedSocket();
ConnectionObject recObj = ar.AsyncState as ConnectionObject;
if (recObj.clientSocket == default(Socket))
{
ExceptionRaised(this, new ExceptionRaiseEventArgs(exc));
}
else
{
ExceptionRaised(recObj.clientSocket, new ExceptionRaiseEventArgs(exc));
}
}
}
