public GarminPacket Decode(Stream stream)
{
EndianBinaryReader endianBinaryReader = stream != null ? new EndianBinaryReader(EndianBitConverter.Little, stream) : throw new ArgumentNullException(nameof(stream));
byte num = endianBinaryReader.ReadByte() == 16 ? endianBinaryReader.ReadByte() : throw new ApplicationException("DLE expected");
DLEStream dleStream = new DLEStream(stream);
int count = dleStream.ReadByte();
GarminPacket packet;
if (num == 161)
{
byte[] numArray = dleStream.ReadBytes(count);
short int16 = BitConverter.ToInt16(((IEnumerable <byte>)numArray).Take(2).ToArray(), 0);
packet = !garminFleetmanagementPacketIdToType.ContainsKey(int16) ? new GarminFleetManagementPacket(int16) : garminFleetmanagementPacketIdToType[int16].GetConstructor(new Type[0]).Invoke(new object[0]) as GarminPacket;
packet.Payload = numArray;
}
else
{
byte[] numArray = dleStream.ReadBytes(count);
packet = !garminPacketIdToType.ContainsKey(num) ? new GarminPacket(num) : garminPacketIdToType[num].GetConstructor(new Type[0]).Invoke(new object[0]) as GarminPacket;
packet.Payload = numArray;
}
if (dleStream.ReadByte() != CalcChecksum(packet))
{
throw new ApplicationException("Invalid checksum");
}
if (endianBinaryReader.ReadByte() != 16)
{
throw new ApplicationException("DLE expected");
}
if (3 != endianBinaryReader.ReadByte())
{
throw new ApplicationException("ETX expected");
}
return(packet);
}
public void Encode(GarminPacket packet, Stream stream)
{
if (packet == null)
{
throw new ArgumentNullException(nameof(packet));
}
EndianBinaryWriter endianBinaryWriter = stream != null ? new EndianBinaryWriter(EndianBitConverter.Little, stream) : throw new ArgumentNullException(nameof(stream));
endianBinaryWriter.Write((byte)16);
endianBinaryWriter.Write(packet.Id);
GarminFleetManagementPacket managementPacket = packet as GarminFleetManagementPacket;
DLEStream dleStream = new DLEStream(stream);
if (managementPacket != null)
{
dleStream.WriteByte((byte)packet.Payload.Length);
dleStream.Write(packet.Payload);
}
else
{
dleStream.WriteByte((byte)packet.Payload.Length);
dleStream.Write(packet.Payload);
}
byte num = CalcChecksum(packet);
dleStream.WriteByte(num);
endianBinaryWriter.Write((byte)16);
endianBinaryWriter.Write((byte)3);
}
