Network Protocol/EVENT

Overview

This article describes the record type EVENT of the Network Protocol. This records transmits item events. These are activating, losing and picking up an item. A new event is placed in the first free slot of EVENT. The data of all events are stored after the slot list. This announcement is active for around 3 seconds and the data is not modified during this time. This means that each console calculates the item routes and the interaction on its own.

Standard Structure of Packet

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 basic race data that is not present in live view.
RACEDATA	1-2	0x40	A record with race data of positions for each player of a client.
USER	0-1	0xC0	A record containing Mii data and friend codes.
ITEM	1-2	0x08	A record containing information about players' items.
EVENT	1	0x18	A record transmitting item events.

Event Types

The byte describing an event type is split up into two parts: a 3 bit action type followed by a 5 bit object number for the item involved.

Types

ID	Name	Description
0	NONE	The neutral value for unused slots (always paired with object ID 0x10).
1	USED	Using an item, such as the Lightning or a Mushroom.
2	SHOT	Throwing an item, either forwards or backwards, such as a Green Shell or Banana.
3	HIT-DRAGGED	Hitting the dragged item of any player, either with your vehicle or an item.
4	HIT-FREE	Hitting any item that is not being dragged, either with your vehicle or an item.
5	LOSE	Used when a Thunder Cloud is lost, either from its timer running out or from passing it to another player.
6	Unknown	Unknown
7	DROP	Dropping an item when hit, including items that dissapear when landing.

Event Data Structure

The data structure depends on the data types defined by the slot list of EVENT. The data is not aligned. To find the DATA for a specific slot, the slots must be iterated to skip the previous data. The data size for a single event differs from 3 to 21 bytes, depending on the action type.

Data Sizes

ID	Size (bytes)
1	3
2	Varies per item
3	20
4	5
5	5
6	4
7	20

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