0x07    ID_PING
0x08    ID_PING_OPEN_CONNECTIONS
0x0B    ID_CONNECTION_REQUEST
0x18    ID_OPEN_CONNECTION_REQUEST
0x19    ID_OPEN_CONNECTION_REPLY
0x1D    ID_CONNECTION_ATTEMPT_FAILED
0x1F    ID_NO_FREE_INCOMING_CONNECTIONS
0x24    ID_CONNECTION_BANNED
0x25    ID_INVALID_PASSWORD
0x27    ID_PONG
0x37    ID_ADVERTISE_SYSTEM

0x26    ID_MODIFIED_PACKET                  # default behavior (did not find the packet||could not handle because not found)