[MetaHook] Event Hook

 1 #include <metahook.h>
 2 
 3 struct event_hook_t
 4 {
 5     event_hook_t *next;
 6     char *name;
 7     void (*pfnEvent)(event_args_s *args);
 8 };
 9 
10 #define HOOKEVENT_SIG "\x8D\x44\x24\x08\x56\x8D\x4C\x24\x08\x50\x51\xFF\x15\x2A\x2A\x2A\x2A\x8B\x44\x24\x10\x83\xC4\x08\x85\xC0\x74\x2A\x80\x38\x00"
11 
12 event_hook_t *g_pEventHooks = NULL;
13 
14 void EV_Init(void)
15 {
16     DWORD base = (DWORD)g_pMetaHookAPI->SearchPattern((void *)g_dwEngineBase, g_dwEngineSize, HOOKEVENT_SIG, sizeof(HOOKEVENT_SIG) - 1);
17     
18     if (base)
19     {
20         g_pEventHooks = (event_hook_t *)(*(DWORD *)(base + 0x72));
21     }
22 }
23 
24 event_hook_t *EV_FindHook(const char *name)
25 {
26     if (!g_pEventHooks)
27     {
28         return NULL;
29     }
30 
31     event_hook_t *ev = g_pEventHooks;
32 
33     while (ev)
34     {
35         if (ev->name && !stricmp(name, ev->name))
36         {
37             return ev;
38         }
39 
40         ev = ev->next;
41     }
42 
43     return NULL;
44 }