protected void addCRC()
{
if (this.packet != null)
{
try
{
byte[] temp = new byte[this.packet.Length + CRC_COUNTER];
byte[] crc = PacketUtility.HexStringToByteArray(Crc16.ComputeChecksum(this.packet).ToString("x2"));
Array.Copy(this.packet, 0, temp, 0, this.packet.Length);
Array.Copy(crc, 0, temp, this.packet.Length, CRC_COUNTER);
this.packet = temp;
}
catch (Exception e)
{
throw e;
}
}
else
{
throw new NullReferenceException();
}
}
public void ShowSegmentInfo(string FileName)
{
try {
textBox1.AppendText(Path.GetFileName(FileName) + Environment.NewLine + Environment.NewLine);
long fsize = new FileInfo(FileName).Length;
byte[] buf = ReadBin(FileName, 0, (uint)fsize);
string calculated = CalculateChecksum(0, (uint)fsize, buf).ToString("X4");
Crc16 C = new Crc16();
string CVN = SwapBytes(C.ComputeChecksum(buf)).ToString("X4");
string FromBin = buf[0].ToString("X2") + buf[1].ToString("X2");
string SegmentNr = buf[2].ToString() + buf[3].ToString();
string PN = BEToUint32(buf, 4).ToString();
string Ver = System.Text.Encoding.ASCII.GetString(buf, 8, 2);
textBox1.AppendText("Calculated checksum: " + calculated + Environment.NewLine);
textBox1.AppendText("Checksum from bin: " + FromBin + Environment.NewLine);
textBox1.AppendText("Segment number: " + SegmentNr + Environment.NewLine);
textBox1.AppendText("PN: " + PN + Environment.NewLine);
textBox1.AppendText("Ver: " + Ver + Environment.NewLine);
textBox1.AppendText("CVN: " + CVN + Environment.NewLine + Environment.NewLine);
}
catch (Exception ex)
{
textBox1.AppendText(ex.Message);
}
}
//以下顺序对应传入参数1-6
/// <summary>
/// Standard,
/// Performs CRC 16 using x^16 + x^15 + x^2 + 1 polynomial with an initial CRC value of 0
/// </summary>
/// <summary>
/// Ccitt,
/// A CRC 16 CCITT Utility using x^16 + x^15 + x^2 + 1 polynomial with an initial CRC value of 0
/// </summary>
/// <summary>
/// CcittKermit,
/// Performs CRC 16 CCITT using a reversed x^16 + x^15 + x^2 + 1 polynomial with an initial CRC value of 0
/// </summary>
/// <summary>
/// CcittInitialValue0xFFFF,
/// Performs CRC 16 CCITT using x^16 + x^15 + x^2 + 1 polynomial with an initial CRC value of 0xffff
/// </summary>
/// <summary>
/// CcittInitialValue0x1D0F,
/// Performs CRC 16 CCITT using x^16 + x^15 + x^2 + 1 polynomial with an initial CRC value of 0x1D0F
/// </summary>
/// <summary>
/// Dnp
/// Performs CRC 16 Distributed Network Protocol (DNP) using reversed x^16 + x^13 + x^12 + x^11 + x^10 + x^8 + x^6 + x^5 + x^2 + 1 (0xA6BC) with an initial CRC value of 0
/// </summary>
public static ushort GetCRC16(byte[] bytes, int number = 1)
{
switch (number)
{
case 1:
return(Crc16.ComputeChecksum(Crc16Algorithm.Standard, bytes));
case 2:
return(Crc16.ComputeChecksum(Crc16Algorithm.Ccitt, bytes));
case 3:
return(Crc16.ComputeChecksum(Crc16Algorithm.CcittKermit, bytes));
case 4:
return(Crc16.ComputeChecksum(Crc16Algorithm.CcittInitialValue0xFFFF, bytes));
case 5:
return(Crc16.ComputeChecksum(Crc16Algorithm.CcittInitialValue0x1D0F, bytes));
case 6:
return(Crc16.ComputeChecksum(Crc16Algorithm.Dnp, bytes));
default:
return(Crc16.ComputeChecksum(Crc16Algorithm.Standard, bytes));
}
}
private void Register_OnPushEvent(object sender, BCMsg.BCMsgArgs e)
{
BCMsg _msg = (sender as BCMsg);
try
{
UInt32 RegisteringDeviceUID = _msg.GetPayload().Reverse().ToUInt32();
Console.WriteLine($"Hello device: {RegisteringDeviceUID.ToString("X4")}");
_msg.Dump();
if ((parentDevice as DeviceManager).DevicePathTable.ContainsKey(RegisteringDeviceUID))
{
Console.WriteLine($"Hello device: {RegisteringDeviceUID.ToString("X4")}");
UInt16 PathHash = Crc16.ComputeChecksum(((parentDevice as DeviceManager).DevicePathTable[RegisteringDeviceUID] + "/").ToByteArr());
Console.WriteLine($"PathHash {PathHash.ToString("X4"),6} Path: {(parentDevice as DeviceManager).DevicePathTable[RegisteringDeviceUID] + "/" }");
byte[] TempArr = { (byte)(RegisteringDeviceUID >> 24), (byte)(RegisteringDeviceUID >> 16), (byte)(RegisteringDeviceUID >> 8), (byte)(RegisteringDeviceUID), (byte)(PathHash >> 8), (byte)PathHash };
msg.Build(TempArr);
//msg.msgUid = rand.Next();
msg.Command = BCMsg.Commande.PUSH;
msg.Dump();
BCMsg.WebInterfaceClass web = new BCMsg.WebInterfaceClass(msg);
//client.Publish($"{web.subscriber}", web.Export().ToByteArr());
parentDevice.client.Publish($"{web.subscriber}", web.Export().ToByteArr());
}
else
{
Console.WriteLine($"Unknown device: {msg.GetPayload().ToHexString()}");
}
}
catch (Exception err)
{
ConsoleEx.Error($"Could not register");
}
}
/// <summary>
/// Sends a packet to the arduino.
/// </summary>
/// <param name="cmd">The command number.</param>
/// <param name="buffer">The bytearray to be sent.</param>
public void Send(int cmd, ArduinoDataType dataType, byte[] buffer)
{
// build serial packet
int checksum = Crc16.ComputeChecksum(buffer);
byte[] serialPacket = new byte[buffer.Length + headerSize];
serialPacket[0] = (byte)(buffer.Length & 0xff);
serialPacket[1] = (byte)((buffer.Length >> 8) & 0xff);
serialPacket[2] = (byte)(checksum & 0xff);
serialPacket[3] = (byte)((checksum >> 8) & 0xff);
serialPacket[4] = (byte)cmd;
serialPacket[5] = (byte)dataType;
Array.Copy(buffer, 0, serialPacket, headerSize, buffer.Length);
// encode packet
byte[] encodedBuffer = new byte[COBS.GetEncodedBufferSize(serialPacket.Length)];
int encodedBufferSize = COBS.Encode(ref serialPacket, serialPacket.Length, ref encodedBuffer);
Array.Resize(ref encodedBuffer, encodedBufferSize + 1);
encodedBuffer[encodedBufferSize] = 0;
// add msg to outgoing queue
lock (sendLockObject)
{
sendPackets.Enqueue(encodedBuffer);
}
}
public unsafe void writeints(int len, int pos, byte *buf)
{
int old_pos = BitLength;
int start = old_pos / 8;
int start1 = pos / 8;
int end = (old_pos + len) / 8;
int end1 = (pos + len) / 8;
flush();
byte start_val = old_pos % 8 != 0 ? buffer[start] : (byte)0;
fixed(byte *buf1 = &buffer[0])
{
if (old_pos % 8 != 0)
{
crc16_m = Crc16.Substract(crc16_m, 0, 1);
}
crc16_m = Crc16.ComputeChecksum(crc16_m, buf + start1, end - start);
AudioSamples.MemCpy(buf1 + start, buf + start1, end - start);
buf1[start] |= start_val;
}
buf_ptr_m = end;
if ((old_pos + len) % 8 != 0)
{
writebits((old_pos + len) % 8, buf[end1] >> (8 - ((old_pos + len) % 8)));
}
}
public static byte[] AssembleMessagePacket(PacketEnvelope envelope, bool encrypt, string encryptPacketKey, string keySalt)
{
try
{
byte[] payloadBody = Zip(Serialization.ObjectToByteArray(envelope));
if (encrypt)
{
payloadBody = Encrypt(encryptPacketKey, keySalt, payloadBody);
}
int grossPacketSize = payloadBody.Length + Constants.PayloadHeaderSize;
byte[] packetBytes = new byte[grossPacketSize];
UInt16 payloadCrc = Crc16.ComputeChecksum(payloadBody);
Buffer.BlockCopy(BitConverter.GetBytes(Constants.PayloadDelimiter), 0, packetBytes, 0, 4);
Buffer.BlockCopy(BitConverter.GetBytes(grossPacketSize), 0, packetBytes, 4, 4);
Buffer.BlockCopy(BitConverter.GetBytes(payloadCrc), 0, packetBytes, 8, 2);
Buffer.BlockCopy(payloadBody, 0, packetBytes, Constants.PayloadHeaderSize, payloadBody.Length);
return(packetBytes);
}
catch (Exception ex)
{
//TODO: allow this to be logged.
}
return(null);
}
public static byte[] AssembleMessagePacket(Packet packet)
{
try
{
byte[] payloadBody = Serialization.ObjectToByteArray(packet);
byte[] payloadBytes = Zip(payloadBody);
int grossPacketSize = payloadBytes.Length + Constants.PayloadHeaderSize;
byte[] packetBytes = new byte[grossPacketSize];
UInt16 payloadCrc = Crc16.ComputeChecksum(payloadBytes);
Buffer.BlockCopy(BitConverter.GetBytes(Constants.PayloadDelimiter), 0, packetBytes, 0, 4);
Buffer.BlockCopy(BitConverter.GetBytes(grossPacketSize), 0, packetBytes, 4, 4);
Buffer.BlockCopy(BitConverter.GetBytes(payloadCrc), 0, packetBytes, 8, 2);
Buffer.BlockCopy(payloadBytes, 0, packetBytes, Constants.PayloadHeaderSize, payloadBytes.Length);
return(packetBytes);
}
catch
{
//TODO: allow this to be logged.
}
return(null);
}
static void Main(string[] args)
{
string input = "Agent 3oH ID ";
var target = new System.Collections.Generic.List <string>()
{
"fb38", "8cc2", "55a5", "4f1a", "318a"
};
//for (int i=1; i<1000; i++)
int i = 0;
while (true)
{
//Guid guid = Guid.NewGuid();
//var bytes = Encoding.ASCII.GetBytes(guid.ToString());
var bytes = Encoding.ASCII.GetBytes(input + i);
string hex = Crc16.ComputeChecksum(bytes).ToString("x2");
if (target.Contains(hex))
{
Console.WriteLine(input + i); //c061
Console.ReadLine();
}
i++;
}
Console.Write("Done!");
Console.ReadKey();
//var bytes = HexToBytes(input);
//var bytes = Encoding.ASCII.GetBytes(input);
//string hex = Crc16.ComputeChecksum(bytes).ToString("x2");
//Console.WriteLine(hex); //c061
//Console.ReadLine();
}
protected override void ConstructResponse(GPCMSession session)
{
session.PlayerInfo.SessionKey = _crc.ComputeChecksum(session.PlayerInfo.Nick + session.PlayerInfo.NamespaceID);
string responseProof = ChallengeProof.GenerateProof
(
session.PlayerInfo.UserData,
session.PlayerInfo.LoginType,
session.PlayerInfo.PartnerID,
session.PlayerInfo.ServerChallenge,
session.PlayerInfo.UserChallenge,
session.PlayerInfo.PasswordHash
);
_sendingBuffer = @"\lc\2\sesskey\" + session.PlayerInfo.SessionKey;
_sendingBuffer += @"\proof\" + responseProof;
_sendingBuffer += @"\userid\" + _result[0]["userid"];
_sendingBuffer += @"\profileid\" + _result[0]["profileid"];
if (session.PlayerInfo.LoginType != LoginType.Nick)
{
_sendingBuffer += @"\uniquenick\" + _result[0]["uniquenick"];
}
_sendingBuffer += @"\lt\" + session.Id.ToString().Replace("-", "").Substring(0, 22) + "__";
_sendingBuffer += @"\id\" + _operationID + @"\final\";
session.PlayerInfo.LoginProcess = LoginStatus.Completed;
}
private ushort CalculateChecksum(byte[] array)
{
var shortArray = new byte[array.Length - 3];
Array.Copy(array, 3, shortArray, 0, shortArray.Length);
return(_ChecksumCalculator.ComputeChecksum(shortArray));
}
static void Main()
{
string input = "8000";
var bytes = HexToBytes(input);
string hex = Crc16.ComputeChecksum(bytes).ToString("x2");
Console.WriteLine(hex); //c061
}
private void TestChecksum(byte[] validChecksum, string dataAsString)
{
byte[] bytes = dataAsString.Trim().Split(' ').Select(v => (byte)int.Parse(v, System.Globalization.NumberStyles.HexNumber)).ToArray();
var checksum = Crc16.ComputeChecksum(bytes);
var checksumBytes = ConvertToBytes(checksum);
Assert.IsTrue(Equals(validChecksum, checksumBytes), $"Checksum did not match. Was: {Format(checksumBytes)}, Expected: {Format(validChecksum)}");
}
public void CheckCrc()
{
var origCrc = BitConverter.ToUInt16(_crc.Reverse().ToArray(), 0);
var res = Crc16.ComputeChecksum(_data);
if (res != origCrc)
{
throw new InvalidDataException("crc mismatch");
}
}
public void Crc16_CrcWithPayloadComputesToZero(string input)
{
var bytes = input.ToBytes();
var crc = Crc16.ComputeChecksum(bytes);
var payload = bytes.ConcatArray(BitConverter.GetBytes(crc));
var secondCrc = Crc16.ComputeChecksum(payload);
secondCrc.Should().Be(0);
}
/// <summary>
/// Computes the hash.
/// </summary>
/// <param name="input">The input.</param>
/// <returns></returns>
public static ushort ComputeHash(string input)
{
if (input == null)
{
input = "";
}
Crc16 crc = new Crc16();
byte[] bytes = Encoding.UTF8.GetBytes(input);
return(crc.ComputeChecksum(bytes));
}
public void CombineTest16()
{
int lenAB = testBytes.Length;
int lenA = 7;
int lenB = lenAB - lenA;
ushort crcAB = Crc16.ComputeChecksum(0, testBytes, 0, lenAB);
ushort crcA = Crc16.ComputeChecksum(0, testBytes, 0, lenA);
ushort crcB = Crc16.ComputeChecksum(0, testBytes, lenA, lenB);
Assert.AreEqual <uint>(crcAB, Crc16.Combine(crcA, crcB, lenB), "CRC16 was not combined correctly.");
Assert.AreEqual <uint>(crcB, Crc16.Combine(crcA, crcAB, lenB), "CRC16 was not substracted correctly.");
Assert.AreEqual <uint>(crcA, Crc16.Substract(crcAB, crcB, lenB), "CRC16 was not substracted correctly.");
}
private static bool _Run()
{
bool result = true;
FCrc16 fcrc = new FCrc16();
Crc16 crc = new Crc16();
result = F.same <ushort>(fcrc.Table.AsEnumerable(), crc.Table.AsEnumerable(), (u1, u2) => u1 == u2);
byte[] test = new byte[] { 0x45, 0x19, 0xA7, 0x00, 0xFE, 0xFF, 0x04, 0x4A };
ushort fChecksum = fcrc.ComputeChecksum(test);
ushort cChecksum = crc.ComputeChecksum(test);
result = result && (fChecksum == cChecksum);
return(result);
}
void aprirePopupQrCodeInvioCassa()
{
InputBoxDialog d = new InputBoxDialog();
d.inputValue.Text = DateTime.Today.ToString("yyyy-MM-dd");
d.Title = "Inserire data riferimento (AAAA-MM-GG)";
bool?esito = d.ShowDialog();
if (esito != true)
{
return;
}
DateTime dataFinale = DateTime.ParseExact(d.inputValue.Text, "yyyy-MM-dd", CultureInfo.InvariantCulture);
var chiusure = riempireDtoChiusure(dataFinale);
if (chiusure == null)
{
dialogProvider.ShowMessage("Nessun dato estratto negli ultimi " + GIORNI_INDIETRO_CHIUSURE + " giorni", "Nessun dato");
return;
}
string messaggio = chiusure.serializeToPiccolaString();
// Aggiungo un crc di sicurezza
Crc16 chk = new Crc16();
ushort crc16 = chk.ComputeChecksum(Encoding.ASCII.GetBytes(messaggio));
// aggiungo un prefisso che è un comando per telegram che vado ad implementare
string qrCode = "/cc " + messaggio + "!" + crc16.ToString("X4");
string nomeFileTemp = Path.Combine(Path.GetTempPath(), "qrcode-cassa.ser.txt");
File.WriteAllBytes(nomeFileTemp, Encoding.ASCII.GetBytes(qrCode));
// Apro la popup lanciando un evento
var ea = new OpenPopupRequestEventArgs {
requestName = "QRcodeChiusureCassaPopup",
param = qrCode
};
RaisePopupDialogRequest(ea);
if (ea.mioDialogResult == true)
{
}
}
public static void applyPacket(byte[] bytes)
// uint8_t type; // 1 B, o: 0, packet type
// uint8_t length; // 1 B, o: 1, packet size
// uint16_t crc16; // 2 B, o: 2, CRC16
// unsigned long packetID;// 4 B, o: 4 running packet count
// unsigned long us_start;// 4 B, o: 8, gather start timestamp
// unsigned long us_end; // 4 B, o: 12, transmit timestamp
// uint16_t analog[8]; // 16 B, o: 16, ADC values
// long variables[8]; // 32 B, o: 32, variables (encoder, speed, etc)
// uint16_t digitalIn; // 2 B, o: 64, digital inputs
// uint8_t digitalOut; // 1 B, o: 66, digital outputs
// uint8_t padding[1]; // 1 B, o: 67, align to 4B
{
State.received = DateTime.Now;
State.raw = bytes;
State.type = bytes[0];
State.length = bytes[1];
State.crc16 = BitConverter.ToUInt16(bytes, 2);
byte[] tmp = new byte[bytes.Length];
bytes.CopyTo(tmp, 0); // make copy
tmp[2] = 0; // set crc16 field to zero, as was when
tmp[3] = 0; // crc16_ccitt was calculated before sending.
State.crc16_tested = CRC.ComputeChecksum(tmp);
if (State.crc16_tested != State.crc16)
{
crcFaults++;
}
State.packetID = BitConverter.ToUInt32(bytes, 4);
State.usStart = BitConverter.ToUInt32(bytes, 8);
State.usEnd = BitConverter.ToUInt32(bytes, 12);
State.analog = new ushort[8];
for (byte i = 0; i < 8; i++)
{
State.analog[i] = BitConverter.ToUInt16(bytes, 16 + 2 * i);
}
State.variables = new int[8];
for (byte i = 0; i < 8; i++)
{
State.variables[i] = BitConverter.ToInt32(bytes, 32 + 4 * i);
}
State.DIN = BitConverter.ToUInt16(bytes, 64);
State.DOUT = bytes[66];
}
public static void SendUP(string text)
{
try {
messagePos = 0;
byte[] SYNC = new byte[] { 0xA5, 0x00 }; //Low endian
byte[] TIME = GetMillisecondTime();
byte[] FID = GetFID();
byte[] XT = GetXT(); //Future will need it to take in an input
byte[] CMD = GetCMD(text);
byte[] DATA = GetData();
byte[] DATALEN = GetDataLen(DATA);
//SYNC:2, TIME:4, FID:2, XT:4, CMD:2, LEN:2, DATA:0-65517, CRC:2 //bytes (8 bits)
byte[] message = new byte[65535]; //18 for debug, 65535 for full
AddToMessage(message, SYNC);
AddToMessage(message, FID);
AddToMessage(message, TIME);
AddToMessage(message, XT);
AddToMessage(message, CMD);
AddToMessage(message, DATALEN);
AddToMessage(message, DATA);
var result = Crc16.ComputeChecksum(message);
byte[] CRC = BitConverter.GetBytes(result);
AddToMessage(message, CRC);
//AsyncCamCom.SendNonAsync(message);
incrementalCounter++;
string s = "";
for (int i = 0; i < message.Length; i++)
{
if (i > 18 && i < 20)
{
s += "... ";
i = message.Length - 2;
}
s += message[i].ToString("X") + " ";
}
//l_Send.Text = s;
Console.WriteLine(s);
} catch (Exception e) {
Console.WriteLine("FAIL\n" + e.ToString());
}
}
UInt16 tcpConnectionId(IPEndPoint src, IPEndPoint dst)
{
byte[] addr1 = src.Address.GetAddressBytes();
byte[] port1 = src.Port.GetBytes();
byte[] addr2 = dst.Address.GetAddressBytes();
byte[] port2 = dst.Port.GetBytes();
byte[] data = new byte[addr1.Length + port1.Length + addr2.Length + port2.Length];
addr1.CopyTo(data, 0);
port1.CopyTo(data, addr1.Length);
addr2.CopyTo(data, addr1.Length + port1.Length);
port2.CopyTo(data, addr1.Length + port1.Length + addr2.Length);
return(Crc16.ComputeChecksum(data));
}
public void PerformCrc16Tests <ExpectedChecksum> (TestParameter <ExpectedChecksum> parameter)
{
var range = parameter.TestRange;
ushort actual = 0;
if (range == TestRange.All)
{
actual = Crc16.ComputeChecksum(parameter.Algorithm, parameter.TestPayload);
}
else
{
actual = Crc16.ComputeChecksum(parameter.Algorithm, parameter.TestPayload, range.Start, range.Length);
}
var expected = (ushort)(object)parameter.ExpectedCrc;
Assert.Equal(expected, actual);
}
public byte[] DecryptData(byte[] rawdata)
{
if (rawdata == null)
{
throw new ArgumentException("Data must not be null");
}
var crcCalced = Crc16.ComputeChecksum(rawdata.Take(rawdata.Length - 5).ToArray());
var msg = Encoding.UTF8.GetString(rawdata).TrimEnd((char)Protocol.END);
var data = HexStringToBytes(msg);
var crc = data[data.Length - 2] + (data[data.Length - 1] << 8);
if (crc != crcCalced)
{
throw new Exception("CRC error");
}
return(_xtea.Decrypt(data.Take(data.Length - 2).ToArray()));
}
public unsafe int DecodeFrame(byte[] buffer, int pos, int len)
{
fixed(byte *buf = buffer)
{
framereader.Reset(buf, pos, len);
Decode_frame_header(framereader, frame);
Decode_subframes(framereader, frame);
framereader.Flush();
ushort crc_1 = DoCRC ? crc16.ComputeChecksum(framereader.Buffer + pos, framereader.Position - pos) : (ushort)0;
ushort crc_2 = (ushort)framereader.Readbits(16);
if (DoCRC && crc_1 != crc_2)
{
throw new Exception("frame crc mismatch");
}
Restore_samples(frame);
_samplesInBuffer = frame.blocksize;
return(framereader.Position - pos);
}
}
public void Crc16CcittFfffValidation( )
{
Assert.AreEqual(Crc16.ComputeChecksum(Crc16Algorithm.CcittInitialValue0xFFFF, TestBuffer), CrcCcittFCrc);
}
public static void DissasemblePacketData(SocketState state, ProcessPayloadCallback processPayload)
{
try
{
if (state.PayloadBuilderLength + state.BytesReceived >= state.PayloadBuilder.Length)
{
Array.Resize(ref state.PayloadBuilder, state.PayloadBuilderLength + state.BytesReceived);
}
Buffer.BlockCopy(state.Buffer, 0, state.PayloadBuilder, state.PayloadBuilderLength, state.BytesReceived);
state.PayloadBuilderLength = state.PayloadBuilderLength + state.BytesReceived;
while (state.PayloadBuilderLength > Constants.PayloadHeaderSize) //[PayloadSize] and [CRC16]
{
Byte[] payloadDelimiterBytes = new Byte[4];
Byte[] payloadSizeBytes = new Byte[4];
Byte[] expectedCrc16Bytes = new Byte[2];
Buffer.BlockCopy(state.PayloadBuilder, 0, payloadDelimiterBytes, 0, payloadDelimiterBytes.Length);
Buffer.BlockCopy(state.PayloadBuilder, 4, payloadSizeBytes, 0, payloadSizeBytes.Length);
Buffer.BlockCopy(state.PayloadBuilder, 8, expectedCrc16Bytes, 0, expectedCrc16Bytes.Length);
int payloadDelimiter = BitConverter.ToInt32(payloadDelimiterBytes, 0);
int grossPayloadSize = BitConverter.ToInt32(payloadSizeBytes, 0);
UInt16 expectedCrc16 = BitConverter.ToUInt16(expectedCrc16Bytes, 0);
if (payloadDelimiter != Constants.PayloadDelimiter)
{
SkipPacket(ref state);
//throw new Exception("Malformed payload packet, invalid delimiter.");
continue;
}
if (grossPayloadSize < Constants.DefaultMinMsgSize || grossPayloadSize > Constants.DefaultMaxMsgSize)
{
SkipPacket(ref state);
//throw new Exception("Malformed payload packet, invalid length.");
continue;
}
if (state.PayloadBuilderLength < grossPayloadSize)
{
//We have data in the buffer, but it's not enough to make up
// the entire message so we will break and wait on more data.
break;
}
UInt16 actualCrc16 = Crc16.ComputeChecksum(state.PayloadBuilder, Constants.PayloadHeaderSize, grossPayloadSize - Constants.PayloadHeaderSize);
if (actualCrc16 != expectedCrc16)
{
SkipPacket(ref state);
//throw new Exception("Malformed payload packet, invalid CRC.");
continue;
}
int netPayloadSize = grossPayloadSize - Constants.PayloadHeaderSize;
byte[] payloadBytes = new byte[netPayloadSize];
Buffer.BlockCopy(state.PayloadBuilder, Constants.PayloadHeaderSize, payloadBytes, 0, netPayloadSize);
byte[] payloadBody = Unzip(payloadBytes);
Packet packet = (Packet)Serialization.ByteArrayToObject(payloadBody);
processPayload(state, packet);
//Zero out the consumed portion of the payload buffer - more for fun than anything else.
Array.Clear(state.PayloadBuilder, 0, grossPayloadSize);
Buffer.BlockCopy(state.PayloadBuilder, grossPayloadSize, state.PayloadBuilder, 0, state.PayloadBuilderLength - grossPayloadSize);
state.PayloadBuilderLength -= grossPayloadSize;
}
}
catch (Exception ex)
{
//TODO: allow this to be logged.
}
}
/// <summary>
/// Threaded function. Loops and checks for incoming packets.
/// </summary>
private void ReceiveThreadDoTask()
{
try
{
byte[] receiveBuffer = new byte[bufferSize];
int bytesReceived = 0;
while (running)
{
while (sendPackets.Count > 0)
{
byte[] serialPacket;
lock (sendLockObject)
{
serialPacket = sendPackets.Dequeue();
}
stream.Write(serialPacket, 0, serialPacket.Length);
}
if (stream.BytesToRead > 0)
{
int x = stream.ReadByte();
if (x == -1)
{
// Debug.LogError("End of Stream!");
// running = false;
continue;
}
if (x == 0)
{
// decode
byte[] decodedBuffer = new byte[receiveBuffer.Length];
int decodedBufferSize = COBS.Decode(ref receiveBuffer, bytesReceived, ref decodedBuffer);
Array.Resize(ref decodedBuffer, decodedBufferSize);
// disect packt
int len = decodedBuffer[0] | (decodedBuffer[1] << 8);
int checksum = decodedBuffer[2] | (decodedBuffer[3] << 8);
int cmd = decodedBuffer[4];
ArduinoDataType dataType = (ArduinoDataType)decodedBuffer[5];
byte[] dataPacket = new byte[decodedBuffer.Length - headerSize];
Array.Copy(decodedBuffer, headerSize, dataPacket, 0, decodedBufferSize - headerSize);
// check length
if (dataPacket.Length != len)
{
Debug.Log(String.Format("Invalid Packet Length. Want: {0} - Have: {1}", len, dataPacket.Length));
continue;
}
// checksum
int packetChecksum = Crc16.ComputeChecksum(dataPacket);
if (checksum != packetChecksum)
{
Debug.Log(String.Format("Invalid Checksum. Want: {0} - Have: {1}", checksum, packetChecksum));
continue;
}
bytesReceived = 0;
// store in queue
lock (receiveLockObject)
{
receivedPackets.Enqueue(new ArduinoBuffer(cmd, dataType, dataPacket));
}
}
else
{
if (bytesReceived >= bufferSize)
{
// TODO handle differently!
bytesReceived = 0;
}
else
{
receiveBuffer[bytesReceived++] = (byte)x;
}
}
}
}
}
catch (ThreadAbortException ex)
{
Debug.Log("Aborting UDP Receiver Thread!");
// Debug.LogException(ex);
}
}
private static ushort ComputeCrc(byte[] val)
{
var crc16 = new Crc16(Crc16Mode.Standard);
return crc16.ComputeChecksum(val);
}
public void Crc16DnpValidation( )
{
Assert.AreEqual(Crc16.ComputeChecksum(Crc16Algorithm.Dnp, TestBuffer), CrcDnpCrc);
}
public void Crc16CcittValidation( )
{
Assert.AreEqual(Crc16.ComputeChecksum(Crc16Algorithm.Ccitt, TestBuffer), CrcCcittCrc);
}
