85 lines
2.7 KiB
C++
85 lines
2.7 KiB
C++
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#include "cfgmgr32hook.h"
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#include <vector>
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#include <windows.h>
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#include <cfgmgr32.h>
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#include "util/detour.h"
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typedef CONFIGRET (WINAPI *CM_Locate_DevNodeA_t)(PDEVINST, DEVINSTID_A, ULONG);
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typedef CONFIGRET (WINAPI *CM_Get_Parent_t)(PDEVINST, DEVINST, ULONG);
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typedef CONFIGRET (WINAPI *CM_Get_Device_IDA_t)(DEVINST, PSTR, ULONG, ULONG);
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static CM_Locate_DevNodeA_t CM_Locate_DevNodeA_real = nullptr;
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static CM_Get_Parent_t CM_Get_Parent_real = nullptr;
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static CM_Get_Device_IDA_t CM_Get_Device_IDA_real = nullptr;
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static std::vector<CFGMGR32_HOOK_SETTING> CFGMGR32_HOOK_SETTINGS;
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static CONFIGRET WINAPI CM_Locate_DevNodeA_hook(PDEVINST pdnDevInst, DEVINSTID_A pDeviceID, ULONG ulFlags) {
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// check device ID
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if (!pDeviceID)
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return CM_Locate_DevNodeA_real(pdnDevInst, pDeviceID, ulFlags);
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// custom
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for (auto &setting : CFGMGR32_HOOK_SETTINGS) {
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if (_stricmp(pDeviceID, setting.device_node_id.c_str()) == 0) {
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*pdnDevInst = (DEVINST) setting.device_instance;
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return CR_SUCCESS;
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}
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}
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// fallback
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return CM_Locate_DevNodeA_real(pdnDevInst, pDeviceID, ulFlags);
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}
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static CONFIGRET WINAPI CM_Get_Parent_hook(PDEVINST pdnDevInst, DEVINST dnDevInst, ULONG ulFlags) {
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// custom
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for (auto &setting : CFGMGR32_HOOK_SETTINGS) {
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if (dnDevInst == (DEVINST) setting.device_instance) {
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*pdnDevInst = (DEVINST) setting.parent_instance;
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return CR_SUCCESS;
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}
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}
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// fallback
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return CM_Get_Parent_real(pdnDevInst, dnDevInst, ulFlags);
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}
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static CONFIGRET WINAPI CM_Get_Device_IDA_hook(DEVINST dnDevInst, PSTR Buffer, ULONG BufferLen, ULONG ulFlags) {
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// custom
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for (auto &setting : CFGMGR32_HOOK_SETTINGS) {
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if (dnDevInst == (DEVINST) setting.parent_instance) {
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// check buffer size
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if (BufferLen <= setting.device_id.length())
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return CR_BUFFER_SMALL;
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// copy device ID to buffer
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memcpy(Buffer, setting.device_id.c_str(), setting.device_id.length() + 1);
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return CR_SUCCESS;
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}
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}
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// fallback
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return CM_Get_Device_IDA_real(dnDevInst, Buffer, BufferLen, ulFlags);
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}
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void cfgmgr32hook_init(HINSTANCE module) {
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// hook functions
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CM_Locate_DevNodeA_real = (CM_Locate_DevNodeA_t) detour::iat_try(
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"CM_Locate_DevNodeA", (void *) &CM_Locate_DevNodeA_hook, module);
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CM_Get_Parent_real = (CM_Get_Parent_t) detour::iat_try(
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"CM_Get_Parent", (void *) &CM_Get_Parent_hook, module);
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CM_Get_Device_IDA_real = (CM_Get_Device_IDA_t) detour::iat_try(
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"CM_Get_Device_IDA", (void *) &CM_Get_Device_IDA_hook, module);
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}
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void cfgmgr32hook_add(CFGMGR32_HOOK_SETTING setting) {
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CFGMGR32_HOOK_SETTINGS.push_back(setting);
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}
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