Esempio n. 1
0
        /// <summary>
        /// Interprets the command received through the socket
        /// </summary>
        public int Command(string text, Socket socket, int received)
        {
            int      x;
            int      toReceive   = 0;
            int      fileSize    = 0;
            int      timestamp   = 0;
            DateTime timestampDT = new DateTime();
            bool     ignoring    = false;       //true if there's any reason to ignore the file received

            if (text.IndexOf("REGISTER(") > -1) //-----------------------REGISTER------------------------
            {
                int    offset     = text.IndexOf("REGISTER(");
                string macAddress = text.Substring(offset + 9, 17);
                macAddresses.Add(socket, macAddress.Replace(@":", string.Empty));
                Console.WriteLine("An ESP board with MAC: " + macAddress + " has requested access");

                //apro finestra configurazione nuova scheda
                var d = new SafeNewStation(ctx.guiPub.linkedwindow.NewStation);
                Application.Current.Dispatcher.Invoke(d, macAddress.Replace(@":", string.Empty), socket);

                byte[] data = Encoding.UTF8.GetBytes("ACCEPT\r\n");
                try
                {
                    socket.Send(data);                     //blocking method
                }
                catch (Exception)
                {
                    macAddresses.Remove(socket);
                    socket.Close();
                    return(-1);
                }
                int result = ESP_SyncClock(socket);
                if (result == -1)
                {
                    return(-1);
                }
            }
            else if ((x = text.IndexOf("FILE")) > -1)             //-------------------FILE----------------------------
            {
                //FILE\r\n BBBB TTTT 010101010101010101010...

                byte[] buffer = Encoding.UTF8.GetBytes(text);
                byte[] data   = new byte[BUFFER_SIZE];
                //copio l'array "data" nel buffer di ricezione
                for (int i = 0; i < received; i++)
                {
                    data[i] = buffer[i];
                }
                try
                {
                    while (received < 14)
                    {
                        //ricevo di nuovo, finché non ricevo tutti i metadati
                        int receivedBytesLen = socket.Receive(data, received, BUFFER_SIZE - received, SocketFlags.None);
                        received += receivedBytesLen;
                    }

                    //ora ho ricevuto i metadati
                    if (received > 14)
                    {
                        //leggere quanti byte si devono ricevere e timestamp
                        byte[] fileSizeBytes          = new byte[4];
                        byte[] timestampBytes         = new byte[4];
                        byte[] timestampBytesReversed = new byte[4];

                        for (int i = 0; i < 4; i++)
                        {
                            fileSizeBytes[3 - i] = data[i + 6];
                        }
                        for (int i = 0; i < 4; i++)
                        {
                            timestampBytes[3 - i] = data[i + 10];
                        }

                        fileSize    = BitConverter.ToInt32(fileSizeBytes, 0);
                        timestamp   = BitConverter.ToInt32(timestampBytes, 0);
                        timestampDT = FileParser.TimeFromUnixTimestamp(timestamp);
                        toReceive   = fileSize - received + 14;                       //bytes che devo ancora ricevere
                    }

                    string  toAnalyze = Encoding.UTF8.GetString(data, 14, data.Length - 14);
                    string  chunk     = Chunker(toAnalyze, out toAnalyze);
                    Station station   = ctx.getStation(macAddresses[socket]); //dal socket trovo la station
                    if (station == null)                                      //probably, the station isn't configured yet
                    {
                        ignoring = true;                                      //received file will be ignored
                    }
                    else
                    {
                        station.hearbeat();
                    }

                    if (!ignoring)
                    {
                        fileParser.ParseOnTheFly(chunk, station);
                    }

                    while (toReceive > 0)
                    {
                        Array.Clear(data, 0, BUFFER_SIZE);           //svuoto buffer ricezione
                        var ttt = Encoding.UTF8.GetBytes(toAnalyze);
                        ttt.CopyTo(data, 0);                         //ripristino data con il residuo della vecchia ricezione
                        //ricevo ancora
                        int receivedBytesLen = socket.Receive(data, toAnalyze.Length, BUFFER_SIZE - toAnalyze.Length, SocketFlags.None);
                        received += receivedBytesLen;
                        toReceive = toReceive - receivedBytesLen;
                        toAnalyze = Encoding.UTF8.GetString(data);
                        chunk     = Chunker(toAnalyze, out toAnalyze);
                        if (!ignoring)
                        {
                            fileParser.ParseOnTheFly(chunk, station);
                        }
                    }
                }
                catch (Exception)
                {
                    macAddresses.Remove(socket);
                    socket.Close();
                    return(-1);
                }

                Console.WriteLine("{1} Client:{0} data received.", socket.RemoteEndPoint, DateTime.Now.ToString());
            }
            else if (text.IndexOf("SYNC") > -1)             //----------------------SYNC----------------------------
            {
                int result = ESP_SyncClock(socket);
                if (result == -1)
                {
                    return(-1);
                }
            }
            else
            {
                return(-1);
            }

            return(0); //if here, all fine
        }
Esempio n. 2
0
 public Protocol(Context _ctx)
 {
     macAddresses = new Dictionary <Socket, string>();
     ctx          = _ctx;
     fileParser   = new FileParser(ctx);
 }