hooking send() and call the original
i detoured the send() with success, and in my detoured function i want to call the ORIGINAL function !
How to do it if the original itself get hooked, its will go into a loop !
Code:
void *DetourFunc(BYTE *src, const BYTE *dst, const int len)
{
BYTE *jmp = (BYTE*)malloc(len+5);
DWORD dwback;
VirtualProtect(src, len, PAGE_READWRITE, &dwback);
memcpy(jmp, src, len); jmp += len;
jmp[0] = 0xE9;
*(DWORD*)(jmp+1) = (DWORD)(src+len - jmp) - 5;
src[0] = 0xE9;
*(DWORD*)(src+1) = (DWORD)(dst - src) - 5;
VirtualProtect(src, len, dwback, &dwback);
return (jmp-len);
}
int WINAPI mysend(SOCKET s, const char* buf, int len, int flags)
{
MessageBox(NULL, buf, "I caught a packet :) !!!", NULL);
send(s, buf, len, flags);
return 1;
}
BOOL APIENTRY DllMain( HMODULE hModule,
DWORD ul_reason_for_call,
LPVOID lpReserved
)
{
DisableThreadLibraryCalls(hModule);
hMod = LoadLibrary("ws2_32.dll");
DetourFunc((BYTE*)GetProcAddress(hMod, "send"), (BYTE*)mysend,2);
return TRUE;
}
im new here, i hope that members can help me.
thank you |
