コード例 #1
0
        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;
                }
            }
        }
コード例 #2
0
ファイル: ConnectionClass.cs プロジェクト: lnarolski/Pilot
        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);
            }
        }