Network Protocol/ROOM

Overview

This article describes the record type ROOM of the Network Protocol. It is only used in private rooms.

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	1 byte	Message Type: 1: Event start 2: Player registered another as a friend 3: Player joined the room 4: Chat message
0x01	2 bytes	First parameter (different usage depending on message type).
0x03	1 byte	Second parameter (different usage depending on message type).

For message type 1, the first parameter is the event type:
- 0: Grand Prix
- 1: Team Grand Prix
- 2: Balloon Battle
- 3: Coin Runners
For message type 4, the first parameter is the message index (value 0 to 59) and the second parameter is a sequence counter, used to display chat messages in the correct order.
For other message types, the parameters must be zero for the message to be accepted.

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