homebrew snp?

[brew]

I'm sure people have attempted this before...

So I wrote my caps.dat, packed it to an mpq, made my dll, concatinated the mpq to the dll with copy /b irc.dll + sdfg.mpq irc.snp, thus making my snp.

However, since I use WinMPQ to mpqify it, it's obviously not going to have a (signature) file for SFileAuthenticateArchive to check, so it inevitably fails, and sets the second arg to 1 (error code, im guessing  ?)

So i've got something like this:

Code Select Expand


.text:150302CB                 push    edx             ; int *something
.text:150302CC                 push    edi             ; hArchive
.text:150302CD                 call    SFileAuthenticateArchive
.text:150302D2                 mov     eax, [ebp+var_C]
.text:150302D5                 cmp     eax, ebx
.text:150302D7                 jz      short loc_150302E2
.text:150302D9                 cmp     eax, 5          ; jump is taken here
.text:150302DC                 jb      loc_15030369

for now, i patch eax from 1 to 5 at 302D9
I'm under the impression that the rest of the code would run just fine with/without the success of SFileAuthenticateArchive, since it's just a validity check after all, but after it's loaded, DllMain is called, SnpQuery is called twice, then DllMain again.
Here's my code (so far) for my snp:

Code Select Expand


unsigned long bnet_dword = 'LOLZ';
const char *bnet_string = "SC IRC Rofl";
const char *bnet_infostring = "blahblahblah blah blah blah blahddy blah blah blah, bladdy blah blah. blarg blarg ah.";
                            //"An active connection to an Internet provider, or a direct connection to the Internet.";
int bnet_numlist[] = {
0x24, /*sizeof this structure*/
0x20000000,
0x200,
0x10,
0x100,
0x5DC, /*1500*/
0x1F4, /*500*/
4,
2
};

/*
.data:19041D74 dword_19041D74  dd 24h                  ; DATA XREF: SnpQuery
.data:19041D78                 dd 20000000h
.data:19041D7C                 dd 200h
.data:19041D80                 dd 10h
.data:19041D84                 dd 100h
.data:19041D88                 dd 5DCh
.data:19041D8C                 dd 1F4h
.data:19041D90                 dd 4
.data:19041D94                 dd 2
*/

BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved) {
switch (fdwReason) {
case DLL_PROCESS_ATTACH:

break;
case DLL_PROCESS_DETACH:
break;
case DLL_THREAD_ATTACH:
break;
case DLL_THREAD_DETACH:
__asm nop
}
MessageBox(0, "ROFLMAO", 0, 0);
return true;
}

extern "C" {  ////////////////////////////

__declspec(dllexport) bool SnpBind(int arg1, int *arg2) {
MessageBox(0,"SnpBind!",0,0);
if (!arg1) {
if (arg2) {
*arg2 = (int)functiontable;
return true;
}
}
return false;
}

__declspec(dllexport) bool SnpQuery(int arg1, int *arg2, int *arg3, int *arg4, int *arg5) {
MessageBox(0,"SnpQuery!",0,0);
if (arg1 || !arg2 || !arg3 || !arg4 || !arg5)
return false;
*arg2 = (int)bnet_dword;
*arg3 = (int)&bnet_string;
*arg4 = (int)&bnet_infostring;
*arg5 = (int)bnet_numlist;
return true;
}

}     //////////////////////////////


Apparently there's an access violation somewhere along the road a bit later (ebx is 1 at 4DE037) , after the dll's been detached. I must be doing something wrong.. anybody have a clue whatsup?

[l)ragon]

it is kinda early in the morning but shouldn't there be a ";" after your __asm nop

[brew]

it is kinda early in the morning but shouldn't there be a ";" after your __asm nop

"nop"e!

btw, that's just there so it doesnt blab about a syntax error.

[brew]

bump

[xpeh]

Can you explain what you are actually doing?

[brew]

isn't it obvious? I'm trying to make an snp that starcraft can load as multiplayer.