150 lines
3.9 KiB
C++
150 lines
3.9 KiB
C++
// main.cc
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// 8/24/2013 jichi
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// Branch: ITH_DLL/main.cpp, rev 128
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// 8/24/2013 TODO: Clean up this file
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#include "main.h"
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#include "defs.h"
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#include "text.h"
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#include "MinHook.h"
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#include "engine/match.h"
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#include "texthook.h"
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std::unique_ptr<WinMutex> viewMutex;
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namespace
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{
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AutoHandle<> hookPipe = INVALID_HANDLE_VALUE, mappedFile = INVALID_HANDLE_VALUE;
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TextHook* hooks;
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bool running;
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int currentHook = 0;
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DWORD DUMMY;
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}
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DWORD WINAPI Pipe(LPVOID)
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{
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while (running)
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{
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DWORD count = 0;
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BYTE buffer[PIPE_BUFFER_SIZE] = {};
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AutoHandle<> hostPipe = INVALID_HANDLE_VALUE;
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hookPipe = INVALID_HANDLE_VALUE;
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while (!hookPipe || !hostPipe)
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{
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if (!hookPipe)
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{
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hookPipe = CreateFileW(HOOK_PIPE, GENERIC_WRITE, FILE_SHARE_READ, nullptr, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, nullptr);
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}
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if (hookPipe && !hostPipe)
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{
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hostPipe = CreateFileW(HOST_PIPE, GENERIC_READ | FILE_WRITE_ATTRIBUTES, FILE_SHARE_READ, nullptr, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, nullptr);
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DWORD mode = PIPE_READMODE_MESSAGE;
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SetNamedPipeHandleState(hostPipe, &mode, NULL, NULL);
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continue;
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}
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Sleep(50);
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}
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*(DWORD*)buffer = GetCurrentProcessId();
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WriteFile(hookPipe, buffer, sizeof(DWORD), &count, nullptr);
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ConsoleOutput(PIPE_CONNECTED);
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Engine::Hijack();
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while (running && ReadFile(hostPipe, buffer, PIPE_BUFFER_SIZE, &count, nullptr))
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switch (*(HostCommandType*)buffer)
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{
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case HOST_COMMAND_NEW_HOOK:
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{
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auto info = *(InsertHookCmd*)buffer;
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NewHook(info.hp, "UserHook", 0);
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}
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break;
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case HOST_COMMAND_DETACH:
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{
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running = false;
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}
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break;
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}
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}
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hookPipe = INVALID_HANDLE_VALUE;
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for (int i = 0; i < MAX_HOOK; ++i) if (hooks[i].address) hooks[i].Clear();
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FreeLibraryAndExitThread(GetModuleHandleW(ITH_DLL), 0);
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return 0;
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}
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void TextOutput(ThreadParam tp, BYTE* text, int len)
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{
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if (len < 0) return;
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if (len > PIPE_BUFFER_SIZE - sizeof(ThreadParam)) len = PIPE_BUFFER_SIZE - sizeof(ThreadParam);
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BYTE buffer[PIPE_BUFFER_SIZE] = {};
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*(ThreadParam*)buffer = tp;
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memcpy(buffer + sizeof(ThreadParam), text, len);
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WriteFile(hookPipe, buffer, sizeof(ThreadParam) + len, &DUMMY, nullptr);
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}
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void ConsoleOutput(LPCSTR text, ...)
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{
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ConsoleOutputNotif buffer;
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va_list args;
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va_start(args, text);
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vsprintf_s<MESSAGE_SIZE>(buffer.message, text, args);
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WriteFile(hookPipe, &buffer, sizeof(buffer), &DUMMY, nullptr);
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}
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void NotifyHookRemove(uint64_t addr)
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{
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HookRemovedNotif buffer(addr);
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WriteFile(hookPipe, &buffer, sizeof(buffer), &DUMMY, nullptr);
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}
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BOOL WINAPI DllMain(HINSTANCE hModule, DWORD fdwReason, LPVOID)
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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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{
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viewMutex = std::make_unique<WinMutex>(ITH_HOOKMAN_MUTEX_ + std::to_wstring(GetCurrentProcessId()));
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if (GetLastError() == ERROR_ALREADY_EXISTS) return FALSE;
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DisableThreadLibraryCalls(hModule);
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// jichi 9/25/2013: Interprocedural communication with vnrsrv.
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mappedFile = CreateFileMappingW(INVALID_HANDLE_VALUE, nullptr, PAGE_EXECUTE_READWRITE, 0, HOOK_SECTION_SIZE, (ITH_SECTION_ + std::to_wstring(GetCurrentProcessId())).c_str());
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hooks = (TextHook*)MapViewOfFile(mappedFile, FILE_MAP_ALL_ACCESS | FILE_MAP_EXECUTE, 0, 0, HOOK_BUFFER_SIZE);
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memset(hooks, 0, HOOK_BUFFER_SIZE);
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MH_Initialize();
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running = true;
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CreateThread(nullptr, 0, Pipe, nullptr, 0, nullptr); // Using std::thread here = deadlock
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}
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break;
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case DLL_PROCESS_DETACH:
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{
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running = false;
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UnmapViewOfFile(hooks);
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MH_Uninitialize();
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}
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break;
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}
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return TRUE;
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}
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void NewHook(HookParam hp, LPCSTR lpname, DWORD flag)
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{
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if (++currentHook >= MAX_HOOK) return ConsoleOutput(TOO_MANY_HOOKS);
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if (lpname && *lpname) strcpy_s<HOOK_NAME_SIZE>(hp.name, lpname);
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ConsoleOutput(INSERTING_HOOK, hp.name);
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RemoveHook(hp.address, 0);
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if (!hooks[currentHook].Insert(hp, flag)) ConsoleOutput(HOOK_FAILED);
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}
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void RemoveHook(uint64_t addr, int maxOffset)
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{
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for (int i = 0; i < MAX_HOOK; i++)
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if (abs((long long)(hooks[i].address - addr)) <= maxOffset) return hooks[i].Clear();
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}
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// EOF
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