Textractor_test/vnrhook/main.cc
2018-12-21 10:10:51 -05:00

150 lines
3.9 KiB
C++

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