MKWii Network Protocol/ITEM

This pages is related to MKWii Network Protocol and describes the record type ITEM. One record for each player is transmitted together with the race data:

Record structure of a complete racing packet

Size	Count	Type	Description
0x08	0–1	SLOT	Only used for redirected data via a proxy. The record identifies the original client by its slot number.
0x10	1	HEADER	A header for a race packet.
0x28	1	RACEHEADER_1	Basic race data, 1 record per client.
0x28	0-1	RACEHEADER_2	Basic race data, 1 record per client. Not present in live view.
0x40	1–2	RACEDATA	Race data (with positions) for each player of a client.
0xc0	0–1	USER	A USER record containing mii data and friendcode(s).
0x08	1–2	ITEM	Item in the box for each player of a client incl. handshaking to limit some items.
>= 0x18	1	EVENT	A list with 24 byte entries. If a value is not 0x10, it declares an EVENTDATA field is following. After that list, up to 24 EVENTDATA records follow.

Description of the record type ITEM in GNU C notation.

typedef struct udp_item_t
{
 /*00*/  u8	timer;               // start time of item in 8/60s := RACE.timer/8
 /*01*/  u8	item_box;            // item in the box => mkw_item_type_t
 /*02*/  u8	item_tail;           // item at tail => mkw_item_type_t
 /*03*/  u8	mode;                // activation mode: 0=no item, 1-7=handshake
 /*04*/  u8	tail_mode;           // ? 3=hold, 4=shoot, 5=3/3, 6=2/3, 7=1/3
 /*05*/  u8	acknowledge;         // ? 0=ok, 1=fail
 /*06*/  u8	ack_timer;           // return the timer value to accept item of other client
 /*07*/  u8	padding_07;          // padding, always 0

 /*08*/
}
__attribute__ ((packed)) udp_item_t;

Item types

The members item_box and item_tail describe, which item is available in the box (top left of the screen) and at the tail of the vehicle (or around the vehicle). Sometimes item_box switch back to no item, but because of previous modes, a mushroom can be identified. This make some cheat detection more difficult.

The following table shows the item codes. Item cheats use the same codes:

Item codes of Mario Kart Wii

code	name	comments
0x00	Green Shell	—
0x01	Red Shell	—
0x02	Banana	—
0x03	Fake Item Box	—
0x04	Mushroom	—
0x05	Triple Mushroom	—
0x06	Bob-omb	—
0x07	Spiny Shell	—
0x08	Lightning	—
0x09	Star	—
0x0a	Golden Mushroom	—
0x0b	Mega Mushroom	—
0x0c	Blooper	—
0x0d	POW Block	—
0x0e	Thundercloud	—
0x0f	Bullet Bill	—
0x10	Triple Green Shell	—
0x11	Triple Red Shell	—
0x12	Triple Banana	—
0x13	not used	This code was never seen.
0x14	none item	Code for no item available. Sometimes (context dependent) this code means Mushroom.

MKWii Network Protocol

Record Types
HEADER — ROOM — SELECT — USER
RACEHEADER_1 — RACEHEADER_2 — RACEDATA — ITEM — EVENT
NATNEG — ANNOUNCE — QUIT — STATUS — PARAM-STRING
Related Infos
Nintendos Servers — Friend Code & Player ID — User Nick — Dumping Network Traffic
Wiimmfi Extensions
Online Status — Connection Status — Wiimmfi packets — Server SV
Software
Wiimms mkw-ana
Forums Wiimmfi-Project