Network Protocol/RACEHEADER_1

Overview

This article describes the record type RACEHEADER_1 of the Network Protocol.

Race Packet Sections
Name	Amount	Size	Description
SLOT	0-1	0x08	Only used for redirected data via a proxy. The record identifies the original client by its slot number.
HEADER	1	0x10	A header for a race packet.
RACEHEADER_1	1	0x28	A record with basic race data.
RACEHEADER_2	0-1	0x28	A record with game-mode specific race data (not present in live view).
ROOM	0-1	0x04	A record containing a friend room message (not present outside friend room lobbies).
SELECT	0-1	0x38	A record containing data to set up a match (not present during races).
RACEDATA	1-2	0x40	A record containing race data for each player, such as positions or inputs.
USER	0-1	0xC0	A record containing user data such as Miis and friend codes.
ITEM	1-2	0x08	A record containing information about players' items.
EVENT	1	≥ 0x18	A record transmitting item events.

Offset	Size	Description
0x00	4 bytes	Frames since race start (starts counting when all players are synced).
0x04	4 bytes	Shared random seed used for various things.
0x08	1 bit	Battle Type: 0: Balloon Battle 1: Coin Runners
0x08.1	31 bits	Team Bitfield: 0: Blue Team 1: Red Team
0x0C	2 bytes	Amount of frames the player has lagged.
0x0E	1 byte	Vehicle for Player 1.
0x0F	1 byte	Character for Player 1.
0x10	1 byte	Vehicle for Player 2.
0x11	1 byte	Character for Player 2.
0x12	2 bytes	Countdown time.
0x14	2 bytes	Unknown. Most likely each player's controller type.
0x16	1 byte	Course being played.
0x17	1 byte	Unknown. Always 00.
0x18	12 bytes	Client slot for each player.
0x24	1 byte	Engine Class: 0: 50cc 1: 100cc 2: 150cc 3: Mirror
0x25	3 bytes	Padding.

Information:
Nintendo's Servers – Friend Code – Nick – Dumping Network Traffic

Record Types:
HEADER – ROOM – SELECT – USER
RACEHEADER_1 – RACEHEADER_2 – RACEDATA – ITEM – EVENT
NATNEG – ANNOUNCE – QUIT – STATUS – PARAM-STRING

Wiimmfi Extensions:
Online Status – Connection Status – Wiimmfi packets – Server SV

Software:
Wiimms mkw-ana