internal static byte[] Decode(byte[] arr, AesDecryptor aesDecryptor, ref int recvIdx)
{
byte flag = arr[0];
bool ziped = ((flag & 0x80) == 0x80);
bool aesed = ((flag & 0x40) == 0x40);
bool crced = ((flag & 0x20) == 0x20);
int idx = flag & 0x1F;
if (recvIdx == idx)
{
recvIdx++;
if (recvIdx > 0x1F)
{
recvIdx = 0;
}
Byte[] bcrc = new Byte[4];
Buffer.BlockCopy(arr, 1, bcrc, 0, 4);
int crc32 = BitConverter.ToInt32(bcrc, 0);
Byte[] data = new Byte[arr.Length - 1 - 4];
Buffer.BlockCopy(arr, 1 + 4, data, 0, data.Length);
int ncrc32 = 0;
if (crced)
{
ncrc32 = Crc.Crc32(data);
}
if (ncrc32 == crc32)
{
if (aesed)
{
data = aesDecryptor.Decrypt(data);
}
if (ziped)
{
data = ZLib.UnZip(data);
}
if (data != null)
{
return(data);
}
else
{
TcpLogger.LogError("Recv Decode data null");
}
}
else
{
TcpLogger.LogError("Recv error crc32 " + crc32 + " ncrc32" + ncrc32);
}
}
else
{
TcpLogger.LogError("Recv error idx " + idx + " lidx" + recvIdx);
}
return(null);
}
