public static PRUdpPacket Decode(byte[] bytes)
{
var hex = bytes.ToHex();
var str = hex.Substring(4, 2);
string sessionid = "", sig = "", seqnum = "", connsig = "", fragid = "", payload = "";
var typenflags = str.FromHexToBits();
var checksum = hex.Substring(hex.Length - 8);
int[] data = new int[typenflags.Count];
for (int i = 0; i < typenflags.Count; i++)
{
if ((bool)typenflags[i])
{
data[i] = 1;
}
else
{
data[i] = 0;
}
}
var flags = Convert.ToString(data[0]) + Convert.ToString(data[1]) + Convert.ToString(data[2]) + Convert.ToString(data[3]) + Convert.ToString(data[4]);
var type = Convert.ToString(data[5]) + Convert.ToString(data[6]) + Convert.ToString(data[7]);
var packet = new PRUdpPacket();
packet.Type = (PacketTypes)Convert.ToInt32(type, 2);
packet.Flags = PFlags.ParseFlags(flags);
if (packet.Type == PacketTypes.SYN || packet.Type == PacketTypes.CONNECT)
{
sessionid = hex.Substring(6, 2);
sig = hex.Substring(8, 8);
seqnum = hex.Substring(16, 4);
connsig = hex.Substring(20, 8);
/*var f = connsig.Substring(0, 2);
* var ff = connsig.Substring(2, 2);
* var fff = connsig.Substring(4, 2);
* var ffff = connsig.Substring(6, 2);
* connsig = ffff + fff + ff + f;*/
}
else if (packet.Type == PacketTypes.DATA)
{
sessionid = hex.Substring(6, 2);
sig = hex.Substring(8, 8);
seqnum = hex.Substring(16, 4);
fragid = hex.Substring(20, 2);
payload = PythonScript.DecompressPacketPayload(RC4.Decrypt(Encoding.ASCII.GetBytes("CD&ML"), hex.Substring(22, hex.Length - 30).FromHex()).ToHex().Substring(2)).Result;
packet.RMCPayload = RMCPayload.Decode(payload);
}
else
{
sessionid = hex.Substring(6, 2);
seqnum = hex.Substring(8, 4);
}
packet.SessionId = sessionid;
packet.Signature = sig;
packet.Checksum = checksum;
packet.ConnectionSignature = connsig;
packet.Payload = payload;
return(packet);
}
