Network Protocol/RACEHEADER_2

This article describes the record type RACEHEADER_2 of the Network Protocol. This record is not sent during live view, and its contents depend on the game mode.

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.

VS Race Structure

Offset	Size	Description
0x00	13 bits	Players who have finished the race (1 bit per player + 1).
0x01.5	13 bits	Players who are participating in the race (1 bit per player + 1).
0x03.2	13 bits	Players who have disconnected (1 bit per player + 1).
0x04.7	2 bits	Local player count.
0x05.1	4 bits	Client slot for Player 1.
0x05.5	22 bits	Finishing time for Player 1 (6 bits for minutes, 6 for seconds and 10 for milliseconds).
0x08.3	13 bits	Players who are ahead of Player 1 (1 bit per player + 1).
0x0A	4 bits	Client slot for Player 2.
0x0A.4	22 bits	Finishing time for Player 2 (6 bits for minutes, 6 for seconds and 10 for milliseconds).
0x0D.2	13 bits	Players who are ahead of Player 2 (1 bit per player + 1).
0x0F	1 byte	Unknown. Most likely padding.
0x10	2 bytes	Client slot for each player (repeated).
0x12	1 byte	Unknown. Seems to be a unused bitfield for client slots.
0x13	1 byte	Local player count (repeated).
0x14	4 bytes	Time since the race leader finished (in frames).
0x18	4 bytes	Minimum time before the race can time out (in frames). The value for each Nintendo track can be found at 0x808903A4 PAL.
0x1C	1 byte	Marks the player as disconnected if set to 1.
0x1D	1 byte	Unknown. Most likely padding.
0x1E	4 bytes	Time (in frames) since each player last moved faster than 30km/h. Caps at 300 (5 seconds).
0x22	4 bytes	Time (in frames) since the previous countdown value maxed out. Caps at 3600 (1 minute), after which the player is disconnected if in a public room.
0x26	2 bytes	Unknown. Most likely padding.

Balloon Battle Structure

The packet structure for this game mode is unknown.

Coin Runners Structure

The packet structure for this game mode is unknown.

Network Protocol

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