public NetworkManager(Form1 app)
{
form = app;
threadSendQueue = new ConcurrentQueue <string>();
threadRecvQueue = new ConcurrentQueue <string>();
receiver = new Thread(() =>
{
bool error = false;
while (!error)
{
IPAddress[] ips = Dns.GetHostEntry(Dns.GetHostName()).AddressList;
IPAddress ipAddress = IPAddress.Parse(IP);
IPEndPoint ep;
try
{
ep = new IPEndPoint(IPAddress.Any, CHAT_PORT);
listeningSocket = new Socket(ipAddress.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
listeningSocket.Bind(ep);
listeningSocket.Listen(50);
}
catch (Exception e)
{
form.AppendTextBox("System: " + e.Message);
listeningSocket.Close();
while (true)
{
try
{
System.Threading.SpinWait.SpinUntil(() => form.Connection);
Receive();
}
catch (Exception ex)
{
form.AppendTextBox("System: " + ex.Message);
form.Connection = false;
socket.Close();
break;
}
}
continue;
}
//socket = listeningSocket.Accept();
//listeningSocket.Close();
System.Threading.SpinWait.SpinUntil(() => form.Connection);
ip = (socket.RemoteEndPoint as IPEndPoint).Address;
form.Connection = true;
if (!isSenderStarted)
{
sender.Start();
}
while (true)
{
try
{
Receive();
}
catch (Exception e)
{
form.AppendTextBox("System: " + e.Message);
form.Connection = false;
socket.Close();
break;
}
}
}
});
receiver.IsBackground = true;
sender = new Thread(() =>
{
string msg;
isSenderStarted = true;
try
{
while (CheckConnection())
{
System.Threading.SpinWait.SpinUntil(() => !threadSendQueue.IsEmpty);
threadSendQueue.TryDequeue(out msg);
socket.Send(Encoding.ASCII.GetBytes(msg), SocketFlags.None);
form.AppendTextBox("Me: " + msg);
}
} catch (Exception ex)
{
form.AppendTextBox("System: " + ex.Message);
}
isSenderStarted = false;
form.Connection = false;
});
sender.IsBackground = true;
receiver.Start();
}
private void Receive()
{
byte[] bytes = new byte[1024];
int byteCount = socket.Receive(bytes, SocketFlags.None);
if (byteCount > 0)
{
string msg = Encoding.ASCII.GetString(bytes, 0, byteCount);
if (0 == String.Compare(msg, 0, Form1.FILETRANSFER, 0, Form1.FILETRANSFER.Length))
{
IPAddress ipAddress = IPAddress.Parse(IP);
listeningSocket = new Socket(ipAddress.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
IPEndPoint ep = new IPEndPoint(IPAddress.Any, FILE_TRANSFER_PORT);
listeningSocket.Bind(ep);
listeningSocket.Listen(1);
fileTransferSocket = listeningSocket.Accept();
byteCount = fileTransferSocket.Receive(bytes, SocketFlags.None);
msg = Encoding.ASCII.GetString(bytes, 0, byteCount);
ReceiveFile(msg, byteCount);
}
else if (0 == String.Compare(msg, 0, Form1.FILETRANSFER_ENCRYPTED, 0, Form1.FILETRANSFER_ENCRYPTED.Length))
{
IPAddress ipAddress = IPAddress.Parse(IP);
listeningSocket = new Socket(ipAddress.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
IPEndPoint ep = new IPEndPoint(IPAddress.Any, FILE_TRANSFER_PORT);
listeningSocket.Bind(ep);
listeningSocket.Listen(1);
fileTransferSocket = listeningSocket.Accept();
byteCount = fileTransferSocket.Receive(bytes, SocketFlags.None);
msg = Encoding.ASCII.GetString(bytes, 0, byteCount);
ReceiveEncryptedFile(msg, byteCount);
}
else
{
threadRecvQueue.Enqueue(msg);
form.AppendTextBox("Friend: " + msg);
}
}
}
