private void ConnectButton_Clicked(object sender, EventArgs e) //próba połączenia z serwerem
{
ConnectionClass.afterAutoreconnect = false;
if (!ConnectionClass.connected)
{
try
{
if (short.Parse(Port_entry.Text) < 1)
{
DisplayAlert(AppResources.Error, AppResources.WrongPortNumberError, AppResources.OK);
return;
}
}
catch (Exception ex)
{
DisplayAlert(AppResources.WrongPortNumberError, ex.ToString(), AppResources.OK);
return;
}
if (ConnectionClass.Connect(IP_address_entry.Text, Port_entry.Text, Password_entry.Text) == ConnectionState.CONNECTION_NOT_ESTABLISHED)
{
DisplayAlert(AppResources.Error, AppResources.NoConnectionError + "\n" + ConnectionClass.exceptionText, AppResources.OK);
}
else
{
ConnectButton.Text = AppResources.Disconnect;
}
}
else
{
if (ConnectionClass.Disconnect() == ConnectionState.DISCONECT_NOT_SUCCESS)
{
DisplayAlert(AppResources.Error, AppResources.NoConnectionError + "\n" + ConnectionClass.exceptionText, AppResources.OK);
}
else
{
ConnectButton.Text = AppResources.Connect;
}
}
}
public static ConnectionState Send(CommandsFromClient commands, Byte[] data = null) //wysyłanie polecenia
{
if (!startApplicationConnectAttempt && (!afterAutoreconnect && !tcpClient.Connected || !ConnectionClass.connected))
{
afterAutoreconnect = true;
Disconnect();
for (int i = 0; i < 5; i++) //próba ponownego połączenia w przypadku utraty łączności
{
Connect(ipAddress, port.ToString(), password);
if (tcpClient.Connected && ConnectionClass.connected)
{
afterAutoreconnect = false;
break;
}
}
}
if (ConnectionClass.connected)
{
ConnectionState sendConnectionState = ConnectionState.SEND_SUCCESS;
for (int i = 0; i < 5; ++i) //próba ponownego połączenia w przypadku utraty łączności
{
if (!ConnectionClass.connected)
{
ConnectionClass.Connect(ipAddress, port.ToString(), password);
}
try
{
Byte[] command;
Byte[] dataToSend;
Byte[] dataToSendEncoded;
command = BitConverter.GetBytes((int)commands);
if (data == null)
{
dataToSend = new Byte[command.Length];
Buffer.BlockCopy(command, 0, dataToSend, 0, command.Length);
try
{
using (var stream = new MemoryStream())
{
var proc = _aes.CreateEncryptor();
using (var crypto = new CryptoStream(stream, proc, CryptoStreamMode.Write))
{
crypto.Write(dataToSend, 0, dataToSend.Length);
crypto.Clear();
crypto.Close();
}
stream.Close();
dataToSendEncoded = stream.ToArray();
}
}
catch (Exception error)
{
exceptionText = error.ToString();
return(ConnectionState.SEND_NOT_SUCCESS);
}
}
else
{
dataToSend = new Byte[command.Length + data.Length];
int messageSize = (int)(command.Length + data.Length);
Buffer.BlockCopy(command, 0, dataToSend, 0, command.Length);
Buffer.BlockCopy(data, 0, dataToSend, command.Length, data.Length);
try
{
using (var stream = new MemoryStream())
{
var proc = _aes.CreateEncryptor();
using (var crypto = new CryptoStream(stream, proc, CryptoStreamMode.Write))
{
crypto.Write(dataToSend, 0, dataToSend.Length);
crypto.Clear();
crypto.Close();
}
stream.Close();
dataToSendEncoded = stream.ToArray();
}
}
catch (Exception error)
{
exceptionText = error.ToString();
return(ConnectionState.SEND_NOT_SUCCESS);
}
}
byte[] dataToSendEncodedWithLength = new byte[sizeof(int) + dataToSendEncoded.Length];
Buffer.BlockCopy(BitConverter.GetBytes(dataToSendEncoded.Length), 0, dataToSendEncodedWithLength, 0, sizeof(int));
Buffer.BlockCopy(dataToSendEncoded, 0, dataToSendEncodedWithLength, sizeof(int), dataToSendEncoded.Length);
ConnectionClass.stream.Write(dataToSendEncodedWithLength, 0, dataToSendEncodedWithLength.Length);
sendConnectionState = ConnectionState.SEND_SUCCESS;
break;
}
catch (Exception error)
{
exceptionText = error.ToString();
Disconnect();
sendConnectionState = ConnectionState.SEND_NOT_SUCCESS;
}
}
return(sendConnectionState);
}
else
{
return(ConnectionState.CONNECTION_NOT_ESTABLISHED);
}
}