Add direct launcher

1 files changed, 116 insertions, 56 deletions

diff --git a/LauncherInjector/main.cpp b/LauncherInjector/main.cpp
index 5828e9e2..0fd41daf 100644
--- a/LauncherInjector/main.cpp
+++ b/LauncherInjector/main.cpp
@@ -1,12 +1,25 @@
+#define WIN32_LEAN_AND_MEAN
 #include <Windows.h>
 #include <TlHelp32.h>
 #include <filesystem>
 #include <sstream>
 #include <iostream>
 #include <fstream>
+#include <Shlwapi.h>
 
 namespace fs = std::filesystem;
 
+extern "C" {
+    __declspec(dllexport) DWORD AmdPowerXpressRequestHighPerformance = 0x00000001;
+    __declspec(dllexport) DWORD NvOptimusEnablement = 0x00000001;
+}
+
+HMODULE hLauncherModule;
+HMODULE hHookModule;
+
+wchar_t exePath[4096];
+wchar_t buffer[8196];
+
 DWORD GetProcessByName(std::wstring processName)
 {
     HANDLE snapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
@@ -33,28 +46,45 @@ DWORD GetProcessByName(std::wstring processName)
     return 0;
 }
 
-#define PROCESS_NAME L"Titanfall2-unpacked.exe"
-#define DLL_NAME L"Northstar.dll"
+bool GetExePathWide(wchar_t* dest, DWORD destSize)
+{
+    if (!dest) return NULL;
+    if (destSize < MAX_PATH) return NULL;
 
-int main(int argc, char* argv[]) {
-    if (!fs::exists(PROCESS_NAME))
-    {
-        MessageBoxA(0, "Titanfall2-unpacked.exe not found! Please launch from your titanfall 2 directory and ensure you have Northstar installed correctly!", "", MB_OK);
-        return 1;
-    }
+    DWORD length = GetModuleFileNameW(NULL, dest, destSize);
+    return length && PathRemoveFileSpecW(dest);
+}
 
-    if (!fs::exists(DLL_NAME))
-    {
-        MessageBoxA(0, "Northstar.dll not found! Please launch from your titanfall 2 directory and ensure you have Northstar installed correctly!", "", MB_OK);
-        return 1;
-    }
+FARPROC GetLauncherMain()
+{
+    static FARPROC Launcher_LauncherMain;
+    if (!Launcher_LauncherMain)
+        Launcher_LauncherMain = GetProcAddress(hLauncherModule, "LauncherMain");
+    return Launcher_LauncherMain;
+}
+
+void LibraryLoadError(DWORD dwMessageId, const wchar_t* libName, const wchar_t* location)
+{
+    char text[2048];
+    std::string message = std::system_category().message(dwMessageId);
+    sprintf_s(text, "Failed to load the %ls at \"%ls\" (%lu):\n\n%hs\n\nMake sure you followed the Northstar installation instructions carefully.", libName, location, dwMessageId, message.c_str());
+    MessageBoxA(GetForegroundWindow(), text, "Launcher Error", 0);
+}
+
+int main(int argc, char* argv[]) {
 
-    bool isdedi = false;
+    // checked to avoid starting origin, Northstar.dll will check for -dedicated as well on its own
+    bool isDedicated = false;
     for (int i = 0; i < argc; i++)
         if (!strcmp(argv[i], "-dedicated"))
-            isdedi = true;
+            isDedicated = true;
 
-    if (!isdedi && !GetProcessByName(L"Origin.exe") && !GetProcessByName(L"EADesktop.exe"))
+    bool noOriginStartup = false;
+    for (int i = 0; i < argc; i++)
+        if (!strcmp(argv[i], "-noOriginStartup"))
+            noOriginStartup = true;
+
+    if (!isDedicated && !GetProcessByName(L"Origin.exe") && !GetProcessByName(L"EADesktop.exe") && !noOriginStartup)
     {
         // unpacked exe will crash if origin isn't open on launch, so launch it
         // get origin path from registry, code here is reversed from OriginSDK.dll
@@ -77,13 +107,20 @@ int main(int argc, char* argv[]) {
         memset(&pi, 0, sizeof(pi));
         STARTUPINFO si;
         memset(&si, 0, sizeof(si));
-        CreateProcessA(originPath, (LPSTR)"", NULL, NULL, false, CREATE_DEFAULT_ERROR_MODE | CREATE_NEW_PROCESS_GROUP, NULL, NULL, (LPSTARTUPINFOA)&si, &pi);
+        CreateProcessA(originPath, (char*)"", NULL, NULL, false, CREATE_DEFAULT_ERROR_MODE | CREATE_NEW_PROCESS_GROUP, NULL, NULL, (LPSTARTUPINFOA)&si, &pi);
 
         // wait for origin to be ready, this process is created when origin is ready enough to launch game without any errors
         while (!GetProcessByName(L"OriginClientService.exe") && !GetProcessByName(L"EADesktop.exe"))
             Sleep(200);
+
+        CloseHandle(pi.hProcess);
+        CloseHandle(pi.hThread);
     }
 
+#if 0
+    // TODO: MOVE TO Northstar.dll itself and inject in some place
+    // for example hook GetCommandLineA() before real LauncherMain gets called (ie. during InitialiseNorthstar)
+    // GetCommandLineA() is always used, the parameters passed to LauncherMain are basically ignored
     // get cmdline args from file
     std::wstring args;
     std::ifstream cmdlineArgFile;
@@ -97,7 +134,7 @@ int main(int argc, char* argv[]) {
         args.append(L" ");
     }
 
-    if (!isdedi)
+    if (!isDedi)
         cmdlineArgFile = std::ifstream("ns_startup_args.txt");
     else
         cmdlineArgFile = std::ifstream("ns_startup_args_dedi.txt");
@@ -112,53 +149,76 @@ int main(int argc, char* argv[]) {
         args.append(std::wstring(str.begin(), str.end()));
     }
 
-    //if (isdedi)
+    //if (isDedicated)
     //    // copy -dedicated into args if we have it in commandline args
     //    args.append(L" -dedicated");
+#endif
 
-    STARTUPINFO startupInfo;
-    PROCESS_INFORMATION processInfo;
-
-    memset(&startupInfo, 0, sizeof(startupInfo));
-    memset(&processInfo, 0, sizeof(processInfo));
-
-    CreateProcessW(PROCESS_NAME, (LPWSTR)args.c_str(), NULL, NULL, FALSE, CREATE_SUSPENDED, NULL, NULL, &startupInfo, &processInfo);
+    //
 
-    HMODULE hKernel32 = GetModuleHandleW(L"kernel32.dll");
-    LPTHREAD_START_ROUTINE pLoadLibraryW = (LPTHREAD_START_ROUTINE)GetProcAddress(hKernel32, "LoadLibraryW");
-
-    SIZE_T dwLength = (wcslen(DLL_NAME) + 1) * 2;
-    LPVOID lpLibName = VirtualAllocEx(processInfo.hProcess, NULL, dwLength, MEM_COMMIT, PAGE_READWRITE);
-
-    SIZE_T written = 0;
-    WriteProcessMemory(processInfo.hProcess, lpLibName, DLL_NAME, dwLength, &written);
-
-    HANDLE hThread = CreateRemoteThread(processInfo.hProcess, NULL, NULL, pLoadLibraryW, lpLibName, NULL, NULL);
+    bool loadNorthstar = true;
+    for (int i = 0; i < argc; i++)
+        if (!strcmp(argv[i], "-vanilla"))
+            loadNorthstar = false;
 
-    if (hThread == NULL)
     {
-        // injection failed
-
-        std::string errorMessage = "Injection failed! CreateRemoteThread returned ";
-        errorMessage += std::to_string(GetLastError()).c_str();
-        errorMessage += ", make sure bob hasn't accidentally shipped a debug build";
 
-        MessageBoxA(0, errorMessage.c_str(), "", MB_OK);
-        return 0;
-    }
-
-    WaitForSingleObject(hThread, INFINITE);
-
-    //MessageBoxA(0, std::to_string(GetLastError()).c_str(), "", MB_OK);
-
-    CloseHandle(hThread);
+        if (!GetExePathWide(exePath, 4096))
+        {
+            MessageBoxA(GetForegroundWindow(), "Failed getting game directory.\nThe game cannot continue and has to exit.", "Launcher Error", 0);
+            return 1;
+        }
 
-    ResumeThread(processInfo.hThread);
+        {
+            wchar_t* pPath;
+            size_t len;
+            errno_t err = _wdupenv_s(&pPath, &len, L"PATH");
+            if (!err)
+            {
+                swprintf_s(buffer, L"PATH=%s\\bin\\x64_retail\\;%s", exePath, pPath);
+                auto result = _wputenv(buffer);
+                if (result == -1)
+                {
+                    MessageBoxW(GetForegroundWindow(), L"Warning: could not prepend the current directory to app's PATH environment variable. Something may break because of that.", L"Launcher Warning", 0);
+                }
+                free(pPath);
+            }
+            else
+            {
+                MessageBoxW(GetForegroundWindow(), L"Warning: could not get current PATH environment variable in order to prepend the current directory to it. Something may break because of that.", L"Launcher Warning", 0);
+            }
+        }
 
-    VirtualFreeEx(processInfo.hProcess, lpLibName, dwLength, MEM_RELEASE);
+        if (loadNorthstar)
+        {
+            FARPROC Hook_Init = nullptr;
+            {
+                swprintf_s(buffer, L"%s\\Northstar.dll", exePath);
+                hHookModule = LoadLibraryExW(buffer, 0i64, 8u);
+                if (hHookModule) Hook_Init = GetProcAddress(hHookModule, "InitialiseNorthstar");
+                if (!hHookModule || Hook_Init == nullptr)
+                {
+                    LibraryLoadError(GetLastError(), L"Northstar.dll", buffer);
+                    return 1;
+                }
+            }
+
+            ((bool (*)()) Hook_Init)();
+        }
 
-    CloseHandle(processInfo.hProcess);
-    CloseHandle(processInfo.hThread);
+        swprintf_s(buffer, L"%s\\bin\\x64_retail\\launcher.dll", exePath);
+        hLauncherModule = LoadLibraryExW(buffer, 0i64, 8u);
+        if (!hLauncherModule)
+        {
+            LibraryLoadError(GetLastError(), L"launcher.dll", buffer);
+            return 1;
+        }
+    }
 
-    return 0;
+    auto LauncherMain = GetLauncherMain();
+    if (!LauncherMain)
+        MessageBoxA(GetForegroundWindow(), "Failed loading launcher.dll.\nThe game cannot continue and has to exit.", "Launcher Error", 0);
+    //auto result = ((__int64(__fastcall*)())LauncherMain)();
+    //auto result = ((signed __int64(__fastcall*)(__int64))LauncherMain)(0i64);
+    return ((int(__fastcall*)(HINSTANCE, HINSTANCE, LPSTR, int))LauncherMain)(NULL, NULL, NULL, 0); // the parameters aren't really used anyways
 }
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