159 lines
4.4 KiB
C++
159 lines
4.4 KiB
C++
// host.cc
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// 8/24/2013 jichi
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// Branch IHF/main.cpp, rev 111
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#include "host.h"
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#include "pipe.h"
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#include "../vnrhook/include/const.h"
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#include "../vnrhook/include/defs.h"
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#include "../vnrhook/include/types.h"
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HANDLE preventDuplicationMutex;
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HookManager* man;
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HWND dummyWindow;
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bool running;
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namespace
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{ // unnamed
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void GetDebugPrivileges() // Artikash 5/19/2018: Is it just me or is this function 100% superfluous?
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{
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HANDLE processToken;
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TOKEN_PRIVILEGES Privileges = { 1, {0x14, 0, SE_PRIVILEGE_ENABLED} };
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OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &processToken);
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AdjustTokenPrivileges(processToken, FALSE, &Privileges, 0, nullptr, nullptr);
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CloseHandle(processToken);
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}
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} // unnamed namespace
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BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID unused)
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{
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switch (fdwReason)
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{
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case DLL_PROCESS_ATTACH:
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DisableThreadLibraryCalls(hinstDLL);
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GetDebugPrivileges();
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// jichi 8/24/2013: Create hidden window so that ITH can access timer and events
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dummyWindow = CreateWindowW(L"Button", L"InternalWindow", 0, 0, 0, 0, 0, 0, 0, hinstDLL, 0);
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break;
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case DLL_PROCESS_DETACH:
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CloseHost();
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DestroyWindow(dummyWindow);
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break;
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default:
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break;
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}
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return true;
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}
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DLLEXPORT bool StartHost()
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{
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preventDuplicationMutex = CreateMutexW(nullptr, TRUE, ITH_SERVER_MUTEX);
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if (GetLastError() == ERROR_ALREADY_EXISTS || ::running)
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{
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MessageBoxW(nullptr, L"I am sorry that this game is attached by some other VNR ><\nPlease restart the game and try again!", L"Error", MB_ICONERROR);
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return false;
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}
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else
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{
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::running = true;
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::man = new HookManager;
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return true;
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}
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}
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DLLEXPORT void OpenHost()
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{
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CreateNewPipe();
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}
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DLLEXPORT void CloseHost()
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{
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if (::running)
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{
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::running = false;
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delete man;
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CloseHandle(preventDuplicationMutex);
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}
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}
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DLLEXPORT bool InjectProcessById(DWORD processId, DWORD timeout)
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{
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if (processId == GetCurrentProcessId()) return false;
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CloseHandle(CreateMutexW(nullptr, FALSE, (ITH_HOOKMAN_MUTEX_ + std::to_wstring(processId)).c_str()));
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if (GetLastError() == ERROR_ALREADY_EXISTS)
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{
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man->AddConsoleOutput(L"already locked");
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return false;
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}
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HMODULE textHooker = LoadLibraryExW(ITH_DLL, nullptr, DONT_RESOLVE_DLL_REFERENCES);
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wchar_t textHookerPath[MAX_PATH];
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unsigned int textHookerPathSize = GetModuleFileNameW(textHooker, textHookerPath, MAX_PATH) * 2 + 2;
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FreeLibrary(textHooker);
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if (HANDLE processHandle = OpenProcess(PROCESS_ALL_ACCESS, FALSE, processId))
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if (LPVOID remoteData = VirtualAllocEx(processHandle, nullptr, textHookerPathSize, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE))
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if (WriteProcessMemory(processHandle, remoteData, textHookerPath, textHookerPathSize, nullptr))
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if (HANDLE thread = CreateRemoteThread(processHandle, nullptr, 0, (LPTHREAD_START_ROUTINE)LoadLibraryW, remoteData, 0, nullptr))
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{
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WaitForSingleObject(thread, timeout);
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CloseHandle(thread);
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VirtualFreeEx(processHandle, remoteData, 0, MEM_RELEASE);
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CloseHandle(processHandle);
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return true;
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}
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man->AddConsoleOutput(L"couldn't inject dll");
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return false;
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}
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DLLEXPORT bool DetachProcessById(DWORD processId)
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{
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DWORD command = HOST_COMMAND_DETACH;
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DWORD unused;
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return WriteFile(man->GetHostPipe(processId), &command, sizeof(command), &unused, nullptr);
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}
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DLLEXPORT void GetHostHookManager(HookManager** hookman)
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{
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*hookman = man;
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}
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DLLEXPORT bool InsertHook(DWORD pid, const HookParam *hp, std::string name)
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{
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HANDLE commandPipe = man->GetHostPipe(pid);
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if (commandPipe == nullptr) return false;
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BYTE buffer[PIPE_BUFFER_SIZE] = {};
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*(DWORD*)buffer = HOST_COMMAND_NEW_HOOK;
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*(HookParam*)(buffer + sizeof(DWORD)) = *hp;
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if (name.size()) strcpy((char*)buffer + sizeof(DWORD) + sizeof(HookParam), name.c_str());
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DWORD unused;
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return WriteFile(commandPipe, buffer, sizeof(DWORD) + sizeof(HookParam) + name.size(), &unused, nullptr);
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}
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DLLEXPORT bool RemoveHook(DWORD pid, DWORD addr)
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{
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HANDLE commandPipe = man->GetHostPipe(pid);
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if (commandPipe == nullptr) return false;
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HANDLE hookRemovalEvent = CreateEventW(nullptr, TRUE, FALSE, ITH_REMOVEHOOK_EVENT);
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BYTE buffer[sizeof(DWORD) * 2] = {};
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*(DWORD*)buffer = HOST_COMMAND_REMOVE_HOOK;
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*(DWORD*)(buffer + sizeof(DWORD)) = addr;
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DWORD unused;
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WriteFile(commandPipe, buffer, sizeof(DWORD) * 2, &unused, nullptr);
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WaitForSingleObject(hookRemovalEvent, 1000);
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CloseHandle(hookRemovalEvent);
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man->RemoveSingleHook(pid, addr);
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return true;
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}
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// EOF
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