Navigating objects in memory

[KcDan]

Hello, I program in masm (its fun) and I'm trying to make a radar as a little starter project as everyone seems to do (sounds fun and very useful too).

I read around and learned a bit about the workings of WoW and thanks for having all this information available.

I'm having trouble going through all the objects as my loop that Im using to navigate the objects never stops due to the nextObject (+3ch) always being a valid address.

Heres the functions I use

.data
	WoW_clientConn dd 01132F60h
	
.data?
	WoW_ObjManBase  dd ?
	
.code

WoW_ObjMan_Init proc;Initialization for the 'object manager' as they call it.
	;Get Object managers base address
	invoke ReadDW,WoW_clientConn
	add eax,02C24h
	invoke ReadDW,eax
	mov WoW_ObjManBase,eax
	ret

WoW_ObjMan_Init endp

WoW_FirstObj proc;Return the first objects address.
	mov eax,WoW_ObjManBase
	add eax,0ACh
	invoke ReadDW,eax
	ret
WoW_FirstObj endp

WoW_NextObj proc addy:DWORD;Returns the address to the next object.
	add eax,3Ch
	invoke ReadDW,eax
	ret
WoW_NextObj endp

and heres the loop

		
LOCAL curObj:DWORD

invoke WoW_ObjMan_Init

invoke WoW_FirstObj
mov curObj,eax

.while curObj!=0	

     ;Do my shizzle har

     invoke WoW_NextObj,curObj
     mov curObj,eax
.endw;<---------------------This shit keeps looping =-\.

I would appreciate a look over and any help you might give me!

[Xarg0]

try this

.while curObj!=1Ch

1Ch should be the marker for the end of the linked list

[KcDan]

Haha, I figured it out. I had two problems, one was in my ReadDW function (I wasnt error checking and didnt initiliaze my variables) and the other was in my WoW_NextObj function.

WoW_NextObj proc addy:DWORD;Returns the address to the next object.
	add eax,3Ch I never set eax to addy. To fix this I just added 3c to addy and passed addy.
	invoke ReadDW,eax
	ret
WoW_NextObj endp

Its working now. Now to figure out how to retrieve names of the objects and filter types.