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-   -   Solved How to hook MessageBegin with chooker (https://forums.alliedmods.net/showthread.php?t=299856)

Kaido Ren 07-28-2017 07:12
How to hook MessageBegin with chooker
 
Hello. I'm trying to hook function pfnMessageBegin with chooker by Arkshine:
PHP Code:
void MessageBegin(int msg_dest, int msg_type, const float *pOrigin, edict_t *ed) {
    printf(__FUNCTION__"\n");

    if (g_messageBeginHook->Restore()) {
        g_messageBeginOriginalHandle(msg_dest, msg_type, pOrigin, ed);
        g_messageBeginHook->Patch();
    }
}

bool hook_func(void) {
#ifdef WIN32
    g_messageBeginOriginalHandle = g_hooker->MemorySearch<Func_MessageBegin>((char *)&g_engfuncs.pfnMessageBegin, (void *)gpGlobals, FALSE);
#else
    void *sym_ptr = (void *)&g_engfuncs.pfnMessageBegin;

    while (*(unsigned short *)sym_ptr == 0x25ff) {
        sym_ptr = **(void ***)((char *)sym_ptr + 2);
    }

    g_messageBeginOriginalHandle = (Func_MessageBegin)sym_ptr;
#endif

    g_messageBeginHook = g_hooker->CreateHook(g_messageBeginOriginalHandle, (void *)MessageBegin, TRUE);

    return g_messageBeginHook ? true : false;
} 
But the handler is not called, but the hook is happening. What am I doing wrong? :oops:

Arkshine 07-28-2017 11:29
Re: How to hook MessageBegin with chooker
 
(Brief note: CHooker has been made by Joropito).

I don't know about your problem. If you the hook is created successfully, then you hook at the wrong address.

Kaido Ren 07-28-2017 11:35
Re: How to hook MessageBegin with chooker
 
Arkshine, could you tell, how to find the right address?

joropito 07-28-2017 12:19
Re: How to hook MessageBegin with chooker
 
Isn't "&g_engfuncs.pfnMessageBegin" a pointer to the pointer?

Kaido Ren 07-28-2017 12:51
Re: How to hook MessageBegin with chooker
 
And how will be correct?:oops:

Kaido Ren 07-29-2017 04:05
Re: How to hook MessageBegin with chooker
 
problem solved:
PHP Code:
g_messageBeginOriginalHandle = (Func_MessageBegin)g_engfuncs.pfnMessageBegin; 
:D


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