diff options
Diffstat (limited to 'NorthstarDLL/core/hooks.h')
| -rw-r--r-- | NorthstarDLL/core/hooks.h | 311 |
1 files changed, 311 insertions, 0 deletions
diff --git a/NorthstarDLL/core/hooks.h b/NorthstarDLL/core/hooks.h new file mode 100644 index 00000000..f47791fb --- /dev/null +++ b/NorthstarDLL/core/hooks.h @@ -0,0 +1,311 @@ +#pragma once +#include "memory.h" + +#include <string> +#include <iostream> + +void InstallInitialHooks(); + +typedef void (*DllLoadCallbackFuncType)(CModule moduleAddress); +void AddDllLoadCallback(std::string dll, DllLoadCallbackFuncType callback, std::string tag = "", std::vector<std::string> reliesOn = {}); +void AddDllLoadCallbackForDedicatedServer( + std::string dll, DllLoadCallbackFuncType callback, std::string tag = "", std::vector<std::string> reliesOn = {}); +void AddDllLoadCallbackForClient( + std::string dll, DllLoadCallbackFuncType callback, std::string tag = "", std::vector<std::string> reliesOn = {}); + +void CallAllPendingDLLLoadCallbacks(); + +// new dll load callback stuff +enum class eDllLoadCallbackSide +{ + UNSIDED, + CLIENT, + DEDICATED_SERVER +}; + +class __dllLoadCallback +{ + public: + __dllLoadCallback() = delete; + __dllLoadCallback( + eDllLoadCallbackSide side, + const std::string dllName, + DllLoadCallbackFuncType callback, + std::string uniqueStr, + std::string reliesOn); +}; + +#define __CONCAT3(x, y, z) x##y##z +#define CONCAT3(x, y, z) __CONCAT3(x, y, z) +#define __CONCAT2(x, y) x##y +#define CONCAT2(x, y) __CONCAT2(x, y) +#define __STR(s) #s + +// adds a callback to be called when a given dll is loaded, for creating hooks and such +#define __ON_DLL_LOAD(dllName, side, uniquestr, reliesOn, args) \ + void CONCAT2(__dllLoadCallback, uniquestr) args; \ + namespace \ + { \ + __dllLoadCallback CONCAT2(__dllLoadCallbackInstance, __LINE__)( \ + side, dllName, CONCAT2(__dllLoadCallback, uniquestr), __STR(uniquestr), reliesOn); \ + } \ + void CONCAT2(__dllLoadCallback, uniquestr) args + +#define ON_DLL_LOAD(dllName, uniquestr, args) __ON_DLL_LOAD(dllName, eDllLoadCallbackSide::UNSIDED, uniquestr, "", args) +#define ON_DLL_LOAD_RELIESON(dllName, uniquestr, reliesOn, args) \ + __ON_DLL_LOAD(dllName, eDllLoadCallbackSide::UNSIDED, uniquestr, __STR(reliesOn), args) +#define ON_DLL_LOAD_CLIENT(dllName, uniquestr, args) __ON_DLL_LOAD(dllName, eDllLoadCallbackSide::CLIENT, uniquestr, "", args) +#define ON_DLL_LOAD_CLIENT_RELIESON(dllName, uniquestr, reliesOn, args) \ + __ON_DLL_LOAD(dllName, eDllLoadCallbackSide::CLIENT, uniquestr, __STR(reliesOn), args) +#define ON_DLL_LOAD_DEDI(dllName, uniquestr, args) __ON_DLL_LOAD(dllName, eDllLoadCallbackSide::DEDICATED_SERVER, uniquestr, "", args) +#define ON_DLL_LOAD_DEDI_RELIESON(dllName, uniquestr, reliesOn, args) \ + __ON_DLL_LOAD(dllName, eDllLoadCallbackSide::DEDICATED_SERVER, uniquestr, __STR(reliesOn), args) + +// new macro hook stuff +class __autohook; + +class __fileAutohook +{ + public: + std::vector<__autohook*> hooks; + + void Dispatch(); + void DispatchForModule(const char* pModuleName); +}; + +// initialise autohooks for this file +#define AUTOHOOK_INIT() \ + namespace \ + { \ + __fileAutohook __FILEAUTOHOOK; \ + } + +// dispatch all autohooks in this file +#define AUTOHOOK_DISPATCH() __FILEAUTOHOOK.Dispatch(); + +#define AUTOHOOK_DISPATCH_MODULE(moduleName) __FILEAUTOHOOK.DispatchForModule(__STR(moduleName)); + +class __autohook +{ + public: + enum AddressResolutionMode + { + OFFSET_STRING, // we're using a string that of the format dllname.dll + offset + ABSOLUTE_ADDR, // we're using an absolute address, we don't need to process it at all + PROCADDRESS // resolve using GetModuleHandle and GetProcAddress + }; + + char* pFuncName; + + LPVOID pHookFunc; + LPVOID* ppOrigFunc; + + // address resolution props + AddressResolutionMode iAddressResolutionMode; + char* pAddrString = nullptr; // for OFFSET_STRING + LPVOID iAbsoluteAddress = nullptr; // for ABSOLUTE_ADDR + char* pModuleName; // for PROCADDRESS + char* pProcName; // for PROCADDRESS + + public: + __autohook() = delete; + + __autohook(__fileAutohook* autohook, const char* funcName, LPVOID absoluteAddress, LPVOID* orig, LPVOID func) + : pHookFunc(func), ppOrigFunc(orig), iAbsoluteAddress(absoluteAddress) + { + iAddressResolutionMode = ABSOLUTE_ADDR; + + const int iFuncNameStrlen = strlen(funcName) + 1; + pFuncName = new char[iFuncNameStrlen]; + memcpy(pFuncName, funcName, iFuncNameStrlen); + + autohook->hooks.push_back(this); + } + + __autohook(__fileAutohook* autohook, const char* funcName, const char* addrString, LPVOID* orig, LPVOID func) + : pHookFunc(func), ppOrigFunc(orig) + { + iAddressResolutionMode = OFFSET_STRING; + + const int iFuncNameStrlen = strlen(funcName) + 1; + pFuncName = new char[iFuncNameStrlen]; + memcpy(pFuncName, funcName, iFuncNameStrlen); + + const int iAddrStrlen = strlen(addrString) + 1; + pAddrString = new char[iAddrStrlen]; + memcpy(pAddrString, addrString, iAddrStrlen); + + autohook->hooks.push_back(this); + } + + __autohook(__fileAutohook* autohook, const char* funcName, const char* moduleName, const char* procName, LPVOID* orig, LPVOID func) + : pHookFunc(func), ppOrigFunc(orig) + { + iAddressResolutionMode = PROCADDRESS; + + const int iFuncNameStrlen = strlen(funcName) + 1; + pFuncName = new char[iFuncNameStrlen]; + memcpy(pFuncName, funcName, iFuncNameStrlen); + + const int iModuleNameStrlen = strlen(moduleName) + 1; + pModuleName = new char[iModuleNameStrlen]; + memcpy(pModuleName, moduleName, iModuleNameStrlen); + + const int iProcNameStrlen = strlen(procName) + 1; + pProcName = new char[iProcNameStrlen]; + memcpy(pProcName, procName, iProcNameStrlen); + + autohook->hooks.push_back(this); + } + + ~__autohook() + { + delete[] pFuncName; + + if (pAddrString) + delete[] pAddrString; + + if (pModuleName) + delete[] pModuleName; + + if (pProcName) + delete[] pProcName; + } + + void Dispatch() + { + LPVOID targetAddr = nullptr; + + // determine the address of the function we're hooking + switch (iAddressResolutionMode) + { + case ABSOLUTE_ADDR: + { + targetAddr = iAbsoluteAddress; + break; + } + + case OFFSET_STRING: + { + // in the format server.dll + 0xDEADBEEF + int iDllNameEnd = 0; + for (; !isspace(pAddrString[iDllNameEnd]) && pAddrString[iDllNameEnd] != '+'; iDllNameEnd++) + ; + + char* pModuleName = new char[iDllNameEnd + 1]; + memcpy(pModuleName, pAddrString, iDllNameEnd); + pModuleName[iDllNameEnd] = '\0'; + + // get the module address + const HMODULE pModuleAddr = GetModuleHandleA(pModuleName); + + if (!pModuleAddr) + break; + + // get the offset string + uintptr_t iOffset = 0; + + int iOffsetBegin = iDllNameEnd; + int iOffsetEnd = strlen(pAddrString); + + // seek until we hit the start of the number offset + for (; !(pAddrString[iOffsetBegin] >= '0' && pAddrString[iOffsetBegin] <= '9') && pAddrString[iOffsetBegin]; iOffsetBegin++) + ; + + bool bIsHex = + pAddrString[iOffsetBegin] == '0' && (pAddrString[iOffsetBegin + 1] == 'X' || pAddrString[iOffsetBegin + 1] == 'x'); + if (bIsHex) + iOffset = std::stoi(pAddrString + iOffsetBegin + 2, 0, 16); + else + iOffset = std::stoi(pAddrString + iOffsetBegin); + + targetAddr = (LPVOID)((uintptr_t)pModuleAddr + iOffset); + break; + } + + case PROCADDRESS: + { + targetAddr = GetProcAddress(GetModuleHandleA(pModuleName), pProcName); + break; + } + } + + if (MH_CreateHook(targetAddr, pHookFunc, ppOrigFunc) == MH_OK) + { + if (MH_EnableHook(targetAddr) == MH_OK) + spdlog::info("Enabling hook {}", pFuncName); + else + spdlog::error("MH_EnableHook failed for function {}", pFuncName); + } + else + spdlog::error("MH_CreateHook failed for function {}", pFuncName); + } +}; + +// hook a function at a given offset from a dll to be dispatched with AUTOHOOK_DISPATCH() +#define AUTOHOOK(name, addrString, type, callingConvention, args) \ + type callingConvention CONCAT2(__autohookfunc, name) args; \ + namespace \ + { \ + type(*callingConvention name) args; \ + __autohook CONCAT2(__autohook, __LINE__)( \ + &__FILEAUTOHOOK, __STR(name), __STR(addrString), (LPVOID*)&name, (LPVOID)CONCAT2(__autohookfunc, name)); \ + } \ + type callingConvention CONCAT2(__autohookfunc, name) args + +// hook a function at a given absolute constant address to be dispatched with AUTOHOOK_DISPATCH() +#define AUTOHOOK_ABSOLUTEADDR(name, addr, type, callingConvention, args) \ + type callingConvention CONCAT2(__autohookfunc, name) args; \ + namespace \ + { \ + type(*callingConvention name) args; \ + __autohook \ + CONCAT2(__autohook, __LINE__)(&__FILEAUTOHOOK, __STR(name), addr, (LPVOID*)&name, (LPVOID)CONCAT2(__autohookfunc, name)); \ + } \ + type callingConvention CONCAT2(__autohookfunc, name) args + +// hook a function at a given module and exported function to be dispatched with AUTOHOOK_DISPATCH() +#define AUTOHOOK_PROCADDRESS(name, moduleName, procName, type, callingConvention, args) \ + type callingConvention CONCAT2(__autohookfunc, name) args; \ + namespace \ + { \ + type(*callingConvention name) args; \ + __autohook CONCAT2(__autohook, __LINE__)( \ + &__FILEAUTOHOOK, __STR(name), __STR(moduleName), __STR(procName), (LPVOID*)&name, (LPVOID)CONCAT2(__autohookfunc, name)); \ + } \ + type callingConvention CONCAT2(__autohookfunc, name) \ + args + +class ManualHook +{ + public: + char* pFuncName; + + LPVOID pHookFunc; + LPVOID* ppOrigFunc; + + public: + ManualHook() = delete; + ManualHook(const char* funcName, LPVOID func); + ManualHook(const char* funcName, LPVOID* orig, LPVOID func); + bool Dispatch(LPVOID addr, LPVOID* orig = nullptr); +}; + +// hook a function to be dispatched manually later +#define HOOK(varName, originalFunc, type, callingConvention, args) \ + namespace \ + { \ + type(*callingConvention originalFunc) args; \ + } \ + type callingConvention CONCAT2(__manualhookfunc, varName) args; \ + ManualHook varName = ManualHook(__STR(varName), (LPVOID*)&originalFunc, (LPVOID)CONCAT2(__manualhookfunc, varName)); \ + type callingConvention CONCAT2(__manualhookfunc, varName) args + +#define HOOK_NOORIG(varName, type, callingConvention, args) \ + type callingConvention CONCAT2(__manualhookfunc, varName) args; \ + ManualHook varName = ManualHook(__STR(varName), (LPVOID)CONCAT2(__manualhookfunc, varName)); \ + type callingConvention CONCAT2(__manualhookfunc, varName) \ + args + +void MakeHook(LPVOID pTarget, LPVOID pDetour, void* ppOriginal, const char* pFuncName = ""); +#define MAKEHOOK(pTarget, pDetour, ppOriginal) MakeHook(pTarget, pDetour, ppOriginal, __STR(pDetour)) |