private byte[] ParsePackage(byte[] package)
{
byte flag = 0;
if (package[0] == Convert.ToByte("01100001", 2))
{
flag = package[0];
}
byte[] undecodeData = new byte[package.Length - 2];
for (int i = 1, j = 0; i < package.Length - 1; i++, j++)
{
undecodeData[j] = package[i];
}
byte[] decodeData = BitStuffing.DecodeData(undecodeData);
byte destinationAddress = decodeData[0];
if (destinationAddress != Convert.ToByte(textBox5.Text.Length > 0 ? textBox5.Text : "0"))
{
return(null);
}
byte fcs = package[package.Length - 1];
List <byte> firstListBefore = new List <byte>(new byte[] { flag });
List <byte> middleListBefore = new List <byte>(decodeData);
List <byte> lastListBefore = new List <byte>(new byte[] { fcs });
firstListBefore.AddRange(middleListBefore);
firstListBefore.AddRange(lastListBefore);
byte[] data = firstListBefore.ToArray();
return(data);
}
private byte[] CreatePackage(string message)
{
byte flag = Convert.ToByte("01100001", 2);
long sourceAddress = Convert.ToInt64(textBox5.Text.Length > 0 ? textBox5.Text : "0");
if (sourceAddress < 0 || sourceAddress > 255)
{
this.Invoke((MethodInvoker)(delegate
{
textBox3.Text += "Source address must be between 0 and 255" + "\r\n";
}));
return(null);
}
long destinationAddress = Convert.ToInt64(textBox4.Text.Length > 0 ? textBox4.Text : "0");
if (destinationAddress < 0 || destinationAddress > 255)
{
this.Invoke((MethodInvoker)(delegate
{
textBox3.Text += "Source address must be between 0 and 255" + "\r\n";
}));
return(null);
}
byte destinationByte = (byte)destinationAddress;
byte sourceByte = (byte)sourceAddress;
if (destinationByte == sourceByte)
{
this.Invoke((MethodInvoker)(delegate
{
textBox3.Text += "Source and destinations addresses can't be equals\r\n";
}));
return(null);
}
byte[] bytesSent = Encoding.ASCII.GetBytes(message);
byte[] addresses = new byte[] { destinationByte, sourceByte, (byte)bytesSent.Length };
List <byte> addressList = new List <byte>(addresses);
List <byte> bytesSentList = new List <byte>(bytesSent);
addressList.AddRange(bytesSentList);
if (bytesSent.Length > 255)
{
this.Invoke((MethodInvoker)(delegate
{
textBox3.Text += "Data length more than 256 bytes" + "\r\n";
}));
return(null);
}
byte[] dataAfterStuffing = BitStuffing.CodeData(addressList.ToArray());
byte fcs = Convert.ToByte("11111111", 2);
List <byte> firstListBefore = new List <byte>(new byte[] { flag, destinationByte, sourceByte, (byte)bytesSent.Length });
List <byte> middleListBefore = new List <byte>(Encoding.ASCII.GetBytes(message));
List <byte> lastListBefore = new List <byte>(new byte[] { fcs });
firstListBefore.AddRange(middleListBefore);
firstListBefore.AddRange(lastListBefore);
byte[] firstPart = new byte[] { flag };
byte[] lastPart = new byte[] { fcs };
List <byte> firstList = new List <byte>(firstPart);
List <byte> middleList = new List <byte>(dataAfterStuffing);
List <byte> lastList = new List <byte>(lastPart);
firstList.AddRange(middleList);
firstList.AddRange(lastPart);
byte[] package = firstList.ToArray();
return(package);
}