packets

using System.Runtime.InteropServices;

namespace RappelzPlayers
{

    [StructLayout(LayoutKind.Sequential, Pack = 1)]
    public class TS_MESSAGE
    {
        public uint size;
        public ushort id;
        public byte msg_check_sum;

        public void SetChecksum()
        {

            msg_check_sum += (byte)(size & 0xFF);
            msg_check_sum += (byte)((size >> 8) & 0xFF);
            msg_check_sum += (byte)((size >> 16) & 0xFF);
            msg_check_sum += (byte)((size >> 24) & 0xFF);

            msg_check_sum += (byte)(id & 0xFF);
            msg_check_sum += (byte)((id >> 8) & 0xFF);
        }
        public byte GetChecksum(int id, int size)
        {
            byte value = 0;

            value += (byte)(size & 0xFF);
            value += (byte)((size >> 8) & 0xFF);
            value += (byte)((size >> 16) & 0xFF);
            value += (byte)((size >> 24) & 0xFF);

            value += (byte)(id & 0xFF);
            value += (byte)((id >> 8) & 0xFF);

            return value;
        }
    }

    [StructLayout(LayoutKind.Sequential, Pack = 1)]
    public class TS_CA_VERSION : TS_MESSAGE
    {
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 20)]
        public string szVersion;
    }

    [StructLayout(LayoutKind.Sequential, Pack = 1)]
    public class TS_AC_RESULT : TS_MESSAGE
    {
        public ushort request_message_id;
        public ushort result;
        public uint value;
    }
}