Mario Kart Wii Gecko Codes, Cheats, & Hacks
Room Message-based Flags [CLF78] - Printable Version

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+--- Thread: Room Message-based Flags [CLF78] (/showthread.php?tid=1811)



Room Message-based Flags [CLF78] - CLF78 - 04-06-2021

This code lets you use specific room messages to activate/deactivate flags of your choosing. They only work with the host of the room, and will be delivered to the other players when the match is started. The flags will be reset if you enter a new room or go offline.

NOTE: All players must be running the code, else the room will stall.

Since this is a highly customizable code, only the source is provided (with a sample that lets you control two 1 bit flags).

Code:
# NOTE: Injection addresses are in the following order: PAL, NTSC-U, NTSC-J, NTSC-K

##########################
# Exception Vector Flags #
##########################

#### BEGIN SAMPLE CODE ####

# These flags can be customized at will
.set AlwaysWinVote, 0x800001B0
.set MirrorMode, 0x800001B1

#### END SAMPLE CODE ####

##############
# Host Flags #
##############
# INJECT: 0x8065AE70, 0x806569E8, 0x8065A4DC, 0x80649188

# This is used by the host to store the flags on his console temporarily, and to send them at room start.

# Get message type
HostFlags:
srwi r11, r4, 24
cmpwi r11, 1
bne+ normalRoomMessage

#### BEGIN SAMPLE CODE ####

# The code below places the two 1 bit flags at the topmost bits of the message type.
# There are 14 free bits here, use them wisely.

# It's a Room Start message, attach all flags! Load 0x8000 in r11
lis r11, AlwaysWinVote@ha

# Attach AlwaysWinVote
lbz r12, AlwaysWinVote@l(r11)
slwi r12, r12, 23
or r4, r4, r12

# Attach MirrorMode
lbz r12, MirrorMode@l(r11)
slwi r12, r12, 22
or r4, r4, r12

#### END SAMPLE CODE ####

# Return
b end

# Check if it's a Room Message otherwise
normalRoomMessage:
cmpwi r11, 4
bne end

# It's a Room Chat message! Get message subtype
srwi r11, r4, 8
rlwinm r12, r11, 0, 0xFFFF

#### BEGIN SAMPLE CODE ####

# The sample code uses the first and second message to enable/disable AlwaysWinVote, and the third and fourth to enable/disable MirrorMode

# Flag = !(subtype & 1)
rlwinm r11, r11, 0, 31, 31
xori r11, r11, 1

# Load 0x8000 in r6
lis r6, AlwaysWinVote@ha

# Check if it's AlwaysWinVote (ID 0/1)
cmpwi r12, 1
bgt+ notAlwaysWinVote
stb r11, AlwaysWinVote@l(r6)
b end

# Check if it's MirrorMode (ID 2/3)
notAlwaysWinVote:
cmpwi r12, 3
bgt+ end
stb r11, MirrorMode@l(r6)

#### END SAMPLE CODE ####

# Original instruction
end:
li r0, 2

###############
# Guest Flags #
###############
# INJECT: 0x8065AF70, 0x80656AE8, 0x8065A5DC, 0x80649288

# This is used by guests to parse the host's modified messages

# Set region here
.set REGION, ''

.if (region == 'P' || region == 'p')
.set RKNetController, 0x809C20D8
.elseif (region == 'U' || region == 'u' || region == 'E' || region == 'e')
.set RKNetController, 0x809BD918
.elseif (region == 'J' || region == 'j')
.set RKNetController, 0x809C1138
.elseif (region == 'K' || region == 'k')
.set RKNetController, 0x809B0718
.else
.err
.endif

# Check if the message's mainType is 1 (ROOM START)
srwi r11, r3, 24
cmpwi r11, 1
bnelr+

# This snippet is optional, you can remove it if needed
# Get RKNetController->subs[currentSub].hostAid and check that it matches the aid in r4
# This prevents guests from starting the room, code by Seeky
lwz r11, RKNetController@l(r24)
lwz r12, 0x291C(r11)
mulli r12, r12, 0x58
add r11, r11, r12
lbz r11, 0x5A(r11)
cmpw r11, r4
beq realHost
li r3, 0
blr

#### BEGIN SAMPLE CODE ####

# You can use any bit from 9 to 22 for this
# These two values only take one bit, but can take more if necessary, again you must change this to suit your needs

# Load 0x8000 in r12
realHost:
lis r12, AlwaysWinVote@ha

# Store AlwaysWinVote
rlwinm r11, r3, 9, 31, 31
stb r11, AlwaysWinVote@l(r12)

# Store MirrorMode
rlwinm r11, r3, 10, 31, 31
stb r11, MirrorMode@l(r12)

#### END SAMPLE CODE ####

# Finally, clean up the subType to remove any flag
rlwinm r3, r3, 0, 22, 7
blr

###############
# Reset Flags #
###############
# This code resets the flags in order to prevent them from being preserved when joining/creating a new room or going offline.

# INJECTS:
# DWC_SetupGameServer = 0x800D1AB0, 0x800D1A10, 0x800D19D0, 0x800D1B10
# DWC_ConnectToAnybodyAsync = 0x800D1980, 0x800D18E0, 0x800D18A0, 0x800D19E0
# DWC_ConnectToGameServerAsync = 0x800D1D64, 0x800D1CC4, 0x800D1C84, 0x800D1DC4
# DWC_ConnectToGameServerFromGroupId = 0x800D2CD0, 0x800D2C30, 0x800D2BF0, 0x800D2D30
# DWC_Shutdown = 0x800CCDA8, 0x800CCD08, 0x800CCCC8, 0x800CCE08

#### BEGIN SAMPLE CODE ####

# Reset the flags so they don't affect the game
li r12, 0
lis r11, AlwaysWinVote@ha
sth r12, AlwaysWinVote@l(r11)

#### END SAMPLE CODE ####

# Keep the blr though, we're hooking at a function return
blr

Code created by: CLF78
Code credits: Seeky (Prevent Guest from Starting Room snippet)