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// host.cc
// 8/24/2013 jichi
// Branch IHF/main.cpp, rev 111
#include "host.h"
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#include "pipe.h"
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#include "winmutex.h"
#include <atlbase.h>
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#include "../vnrhook/include/const.h"
#include "../vnrhook/include/defs.h"
#include "../vnrhook/include/types.h"
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#include <unordered_map>
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HANDLE preventDuplicationMutex;
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std::unordered_map<ThreadParameter, TextThread*, ThreadParameterHasher> textThreadsByParams;
std::unordered_map<DWORD, ProcessRecord> processRecordsByIds;
CRITICAL_SECTION hostCs;
ThreadEventCallback onCreate, onRemove;
ProcessEventCallback onAttach, onDetach;
WORD nextThreadNumber;
HWND dummyWindow;
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#define HOST_LOCK CriticalSectionLocker hostLocker(hostCs) // Synchronized scope for accessing private data
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void GetDebugPrivileges() // Artikash 5/19/2018: Is it just me or is this function 100% superfluous?
{
HANDLE processToken;
TOKEN_PRIVILEGES Privileges = { 1, {0x14, 0, SE_PRIVILEGE_ENABLED} };
OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &processToken);
AdjustTokenPrivileges(processToken, FALSE, &Privileges, 0, nullptr, nullptr);
CloseHandle(processToken);
}
BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID unused)
{
switch (fdwReason)
{
case DLL_PROCESS_ATTACH:
DisableThreadLibraryCalls(hinstDLL);
// jichi 8/24/2013: Create hidden window so that ITH can access timer and events
dummyWindow = CreateWindowW(L"Button", L"InternalWindow", 0, 0, 0, 0, 0, 0, 0, hinstDLL, 0);
break;
default:
break;
}
return true;
}
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namespace Host
{
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DLLEXPORT bool Start()
{
preventDuplicationMutex = CreateMutexW(nullptr, TRUE, ITH_SERVER_MUTEX);
if (GetLastError() == ERROR_ALREADY_EXISTS)
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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);
return false;
}
else
{
GetDebugPrivileges();
InitializeCriticalSection(&hostCs);
onAttach = onDetach = nullptr;
onCreate = onRemove = nullptr;
nextThreadNumber = 0;
return true;
}
}
DLLEXPORT void Open()
{
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TextThread* console = textThreadsByParams[{ 0, -1UL, -1UL, -1UL }] = new TextThread({ 0, -1UL, -1UL, -1UL }, nextThreadNumber++);
console->Status() |= USING_UNICODE;
if (onCreate) onCreate(console);
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CreateNewPipe();
}
DLLEXPORT void Close()
{
EnterCriticalSection(&hostCs);
DestroyWindow(dummyWindow);
RemoveThreads([](auto one, auto two) { return true; }, {});
//for (auto i : processRecordsByIds) UnregisterProcess(i.first); // Artikash 7/24/2018 FIXME: This segfaults since UnregisterProcess invalidates the iterator
LeaveCriticalSection(&hostCs);
DeleteCriticalSection(&hostCs);
CloseHandle(preventDuplicationMutex);
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}
DLLEXPORT bool InjectProcess(DWORD processId, DWORD timeout)
{
if (processId == GetCurrentProcessId()) return false;
CloseHandle(CreateMutexW(nullptr, FALSE, (ITH_HOOKMAN_MUTEX_ + std::to_wstring(processId)).c_str()));
if (GetLastError() == ERROR_ALREADY_EXISTS)
{
AddConsoleOutput(L"already locked");
return false;
}
HMODULE textHooker = LoadLibraryExW(ITH_DLL, nullptr, DONT_RESOLVE_DLL_REFERENCES);
wchar_t textHookerPath[MAX_PATH];
unsigned int textHookerPathSize = GetModuleFileNameW(textHooker, textHookerPath, MAX_PATH) * 2 + 2;
FreeLibrary(textHooker);
if (HANDLE processHandle = OpenProcess(PROCESS_ALL_ACCESS, FALSE, processId))
if (LPVOID remoteData = VirtualAllocEx(processHandle, nullptr, textHookerPathSize, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE))
if (WriteProcessMemory(processHandle, remoteData, textHookerPath, textHookerPathSize, nullptr))
if (HANDLE thread = CreateRemoteThread(processHandle, nullptr, 0, (LPTHREAD_START_ROUTINE)LoadLibraryW, remoteData, 0, nullptr))
{
WaitForSingleObject(thread, timeout);
CloseHandle(thread);
VirtualFreeEx(processHandle, remoteData, 0, MEM_RELEASE);
CloseHandle(processHandle);
return true;
}
AddConsoleOutput(L"couldn't inject dll");
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return false;
}
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DLLEXPORT bool DetachProcess(DWORD processId)
{
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DWORD command = HOST_COMMAND_DETACH;
DWORD unused;
return WriteFile(processRecordsByIds[processId].hostPipe, &command, sizeof(command), &unused, nullptr);
}
DLLEXPORT bool InsertHook(DWORD pid, HookParam hp, std::string name)
{
BYTE buffer[PIPE_BUFFER_SIZE] = {};
*(DWORD*)buffer = HOST_COMMAND_NEW_HOOK;
*(HookParam*)(buffer + sizeof(DWORD)) = hp;
if (name.size()) strcpy((char*)buffer + sizeof(DWORD) + sizeof(HookParam), name.c_str());
DWORD unused;
return WriteFile(processRecordsByIds[pid].hostPipe, buffer, sizeof(DWORD) + sizeof(HookParam) + name.size(), &unused, nullptr);
}
DLLEXPORT bool RemoveHook(DWORD pid, DWORD addr)
{
HANDLE hostPipe = processRecordsByIds[pid].hostPipe;
if (hostPipe == nullptr) return false;
HANDLE hookRemovalEvent = CreateEventW(nullptr, TRUE, FALSE, ITH_REMOVEHOOK_EVENT);
BYTE buffer[sizeof(DWORD) * 2] = {};
*(DWORD*)buffer = HOST_COMMAND_REMOVE_HOOK;
*(DWORD*)(buffer + sizeof(DWORD)) = addr;
DWORD unused;
WriteFile(hostPipe, buffer, sizeof(DWORD) * 2, &unused, nullptr);
WaitForSingleObject(hookRemovalEvent, 1000);
CloseHandle(hookRemovalEvent);
RemoveThreads([](auto one, auto two) { return one.pid == two.pid && one.hook == two.hook; }, { pid, addr, 0, 0 });
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return true;
}
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DLLEXPORT HookParam GetHookParam(DWORD pid, DWORD addr)
{
HOST_LOCK;
HookParam ret = {};
ProcessRecord pr = processRecordsByIds[pid];
if (pr.hookman_map == nullptr) return ret;
MutexLocker locker(pr.hookman_mutex);
const Hook* hooks = (const Hook*)pr.hookman_map;
for (int i = 0; i < MAX_HOOK; ++i)
if (hooks[i].Address() == addr)
ret = hooks[i].hp;
return ret;
}
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DLLEXPORT std::wstring GetHookName(DWORD pid, DWORD addr)
{
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if (pid == 0) return L"Console";
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HOST_LOCK;
std::string buffer = "";
ProcessRecord pr = processRecordsByIds[pid];
if (pr.hookman_map == nullptr) return L"";
MutexLocker locker(pr.hookman_mutex);
const Hook* hooks = (const Hook*)pr.hookman_map;
for (int i = 0; i < MAX_HOOK; ++i)
if (hooks[i].Address() == addr)
{
buffer.resize(hooks[i].NameLength());
ReadProcessMemory(pr.process_handle, hooks[i].Name(), &buffer[0], hooks[i].NameLength(), nullptr);
}
USES_CONVERSION;
return std::wstring(A2W(buffer.c_str()));
}
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DLLEXPORT TextThread* GetThread(DWORD number)
{
HOST_LOCK;
for (auto i : textThreadsByParams)
if (i.second->Number() == number)
return i.second;
return nullptr;
}
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DLLEXPORT void AddConsoleOutput(std::wstring text)
{
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HOST_LOCK;
textThreadsByParams[{ 0, -1UL, -1UL, -1UL }]->AddSentence(std::wstring(text));
}
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DLLEXPORT void RegisterThreadCreateCallback(ThreadEventCallback cf) { onCreate = cf; }
DLLEXPORT void RegisterThreadRemoveCallback(ThreadEventCallback cf) { onRemove = cf; }
DLLEXPORT void RegisterProcessAttachCallback(ProcessEventCallback cf) { onAttach = cf; }
DLLEXPORT void RegisterProcessDetachCallback(ProcessEventCallback cf) { onDetach = cf; }
}
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void DispatchText(DWORD pid, DWORD hook, DWORD retn, DWORD split, const BYTE * text, int len)
{
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// jichi 20/27/2013: When PID is zero, the text comes from console, which I don't need
if (!text || !pid || len <= 0) return;
HOST_LOCK;
ThreadParameter tp = { pid, hook, retn, split };
TextThread *it;
if ((it = textThreadsByParams[tp]) == nullptr)
{
it = textThreadsByParams[tp] = new TextThread(tp, nextThreadNumber++);
if (Host::GetHookParam(pid, hook).type & USING_UNICODE) it->Status() |= USING_UNICODE;
if (onCreate) onCreate(it);
}
it->AddText(text, len);
}
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void RemoveThreads(bool(*RemoveIf)(ThreadParameter, ThreadParameter), ThreadParameter cmp)
{
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HOST_LOCK;
std::vector<ThreadParameter> removedThreads;
for (auto i : textThreadsByParams)
if (RemoveIf(i.first, cmp))
{
if (onRemove) onRemove(i.second);
//delete i.second; // Artikash 7/24/2018: FIXME: Qt GUI updates on another thread, so I can't delete this yet.
i.second->Reset(); // Temp workaround to free some memory.
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removedThreads.push_back(i.first);
}
for (auto i : removedThreads) textThreadsByParams.erase(i);
}
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void RegisterProcess(DWORD pid, HANDLE hostPipe)
{
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HOST_LOCK;
ProcessRecord record;
record.hostPipe = hostPipe;
record.hookman_section = OpenFileMappingW(FILE_MAP_READ, FALSE, (ITH_SECTION_ + std::to_wstring(pid)).c_str());
record.hookman_map = MapViewOfFile(record.hookman_section, FILE_MAP_READ, 0, 0, HOOK_SECTION_SIZE / 2); // jichi 1/16/2015: Changed to half to hook section size
record.process_handle = OpenProcess(PROCESS_ALL_ACCESS, FALSE, pid);
record.hookman_mutex = OpenMutexW(MUTEX_ALL_ACCESS, FALSE, (ITH_HOOKMAN_MUTEX_ + std::to_wstring(pid)).c_str());
processRecordsByIds[pid] = record;
if (onAttach) onAttach(pid);
}
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void UnregisterProcess(DWORD pid)
{
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HOST_LOCK;
ProcessRecord pr = processRecordsByIds[pid];
if (!pr.hostPipe) return;
CloseHandle(pr.hookman_mutex);
UnmapViewOfFile(pr.hookman_map);
CloseHandle(pr.process_handle);
CloseHandle(pr.hookman_section);
processRecordsByIds.erase(pid);
RemoveThreads([](auto one, auto two) { return one.pid == two.pid; }, { pid, 0, 0, 0 });
if (onDetach) onDetach(pid);
}
// EOF