00 01  - 00 00 00 03            - 38 04 cf 3d         - 00 00 02 00            - 4c 6f 67 69 6e 55 64 70 5f 31 31 00
OPcode - 4 bytes of crc length  - 4 bytes session id  - 4 bytes max udp length - TEXT "LoginUdp_11."
00 02  - 38 04 cf 3d            - 30 0a 4d 81         - 02                     - 01                     - 00             - 00 00 02 00              - 00 00 00 03
OPcode - 4 bytes session id     - 4 bytes CRC seed    - crc length             - use compression        - seedsize       - server max udp length    - ?