Help with reverse engineering

[zRampageP]

Hi guys, I'm trying to learn something about reverse engineering with Shaiya and I've already done some works, but now I'm stuck and I'm here to ask help.
I was searching something to add safe zones and I found where Eric-Dutra16 released a Cheat engine script for creating safe zones.
Here's the script code

 Spoiler

[ENABLE]
alloc(newmem,2048)
label(returnhere)
label(originalcode)
label(campo)

newmem:
cmp word ptr [eax+164],(int)60
je campo

originalcode:
mov dl,[edx+0000012D]
jmp returnhere

campo:
cmp dword ptr [edx+D0],(float)120.000
jl 0044BE69
cmp dword ptr [edx+D0],(float)253.000
jg 0044BE69
cmp dword ptr [eax+D0],(float)120.000
jl 0044BE69
cmp dword ptr [eax+D0],(float)253.000
jg 0044BE69
jmp originalcode

0044BE5B:
jmp newmem
nop
returnhere:

[DISABLE]
dealloc(newmem)

0044BE5B:
mov dl,[edx+0000012D]

Now I can't understand what does "dword ptr [edx+D0]" represent, surely a coordinate (x coord i guess), but what specific coordinate? I can't figure it out, thanks for your help

[Eric-Dutra16]

Actually this script was made by nubness (sorry nubness, I know I did very wrong). I don't have a 4.5 server for testing and I don't remember but I think "[edx+D0]" is the X coordinate of the player who is receiving the attack and "[eax+D0]" is the X coordinate of the attacking player, or vice versa. If you want to know, activate the script in the cheat engine, go to the line "cmp dword ptr [edx+D0],(float)120.000" right click, select "find out what addresses this instruction accesses", select "Float" at the bottom of the window, then go into the game and attack the player.

[killzone]

Best bet is for you to start learning ASM (Assembly Language).
Tutorials are good and all but its useless when you're on your own since you will not understand how the flow of the program works without learning ASM.

[zRampageP]

Originally Posted by Eric-Dutra16

Actually this script was made by nubness (sorry nubness, I know I did very wrong). I don't have a 4.5 server for testing and I don't remember but I think "[edx+D0]" is the X coordinate of the player who is receiving the attack and "[eax+D0]" is the X coordinate of the attacking player, or vice versa. If you want to know, activate the script in the cheat engine, go to the line "cmp dword ptr [edx+D0],(float)120.000" right click, select "find out what addresses this instruction accesses", select "Float" at the bottom of the window, then go into the game and attack the player.

First of all, thanks both.
Second thing: what if I want to do that script to myself? I have an ep 6.3 so nubness's script doesn't work, how could I search for find a generic attack (offset) (for check later if is in x y z position?), what should I search?

Originally Posted by killzone

Best bet is for you to start learning ASM (Assembly Language).
Tutorials are good and all but its useless when you're on your own since you will not understand how the flow of the program works without learning ASM.

Yeah, I know I should learn also assembly, but atm I'm very busy and I'm only searching something to distract me in my free time

[zRampageP]

Someone?

[zRampageP]

#up; still searching for answer

[kolin79]

Hello everyone Safe zone is much easier to do. Everything is done in the Client.



Well, the effect itself is set in the file 45.wld

[zRampageP]

Originally Posted by kolin79

Hello everyone Safe zone is much easier to do. Everything is done in the Client.



Well, the effect itself is set in the file 45.wld

Thanks kolin, I know is possible also through client protection, but can easily be exploited. Also I'd like to learn something new about reverse engineering

[kolin79]

In general, I think on PvP zones enough more guards to put it all the same pvp zone there can not rest.

[zRampageP]

Originally Posted by kolin79

In general, I think on PvP zones enough more guards to put it all the same pvp zone there can not rest.

I can't use guards in that situation otherwise, I'll not make that question.
Also, as I already said, I'd love to learn something new