public static byte[] CreateData(IPacket packet)
{
if (packet == null)
throw new ArgumentNullException("packet");
var content = packet.GetContent();
var idLengthContent = new byte[content.Length + PacketIdFieldWidth + ContentLengthFieldWidth];
idLengthContent[0] = (byte)packet.Id;
var contentLength = BitConverter.GetBytes(content.Length);
idLengthContent[1] = contentLength[0]; // Not in the mood for a for loop
idLengthContent[2] = contentLength[1];
idLengthContent[3] = contentLength[2];
idLengthContent[4] = contentLength[3];
for (int i = (PacketIdFieldWidth + ContentLengthFieldWidth); i < idLengthContent.Length; ++i)
idLengthContent[i] = content[i - (PacketIdFieldWidth + ContentLengthFieldWidth)];
byte[] checksum;
using (var provider = new Crc32())
checksum = provider.ComputeHash(idLengthContent, 0, idLengthContent.Length);
using (var ms = new MemoryStream())
{
ms.Write(checksum, 0, ChecksumWidth);
ms.Write(idLengthContent, 0, idLengthContent.Length);
return ms.ToArray();
}
}
