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SmokeAPI/src/smoke_api/smoke_api.cpp

130 lines
4.0 KiB
C++

#include <smoke_api/smoke_api.hpp>
#include <steam_functions/steam_functions.hpp>
#include <build_config.h>
#include <koalabox/config_parser.hpp>
#include <koalabox/dll_monitor.hpp>
#include <koalabox/file_logger.hpp>
#include <koalabox/hook.hpp>
#include <koalabox/loader.hpp>
#include <koalabox/win_util.hpp>
#ifndef _WIN64
#include <koalageddon/koalageddon.hpp>
#endif
namespace smoke_api {
Config config = {}; // NOLINT(cert-err58-cpp)
HMODULE original_library = nullptr;
bool is_hook_mode = false;
Path self_directory;
void init_config() {
// TODO: Detect koalageddon mode first, and then fetch config from corresponding directory
config = config_parser::parse<Config>(self_directory / PROJECT_NAME".json");
}
void init_proxy_mode() {
logger->info("🔀 Detected proxy mode");
original_library = loader::load_original_library(self_directory, ORIGINAL_DLL);
}
void init_hook_mode() {
logger->info("🪝 Detected hook mode");
dll_monitor::init(STEAMCLIENT_DLL, [](const HMODULE& library) {
original_library = library;
DETOUR_ORIGINAL(CreateInterface)
});
// Hooking steam_api has shown itself to be less desirable than steamclient
// for the reasons outlined below:
//
// Calling original in flat functions will actually call the hooked functions
// because the original function redirects the execution to a function taken
// from self pointer, which would have been hooked by SteamInternal_*Interface
// functions.
//
// Furthermore, turns out that many flat functions share the same body,
// which looks like the following snippet:
//
// mov rax, qword ptr ds:[rcx]
// jmp qword ptr ds:[rax+immediate]
//
// This means that we end up inadvertently hooking unintended functions.
// Given that hooking steam_api has no apparent benefits, but has inherent flaws,
// the support for it has been dropped from this project.
}
void init(HMODULE self_module) {
try {
DisableThreadLibraryCalls(self_module);
koalabox::project_name = PROJECT_NAME;
self_directory = loader::get_module_dir(self_module);
init_config();
const auto exe_path = Path(win_util::get_module_file_name_or_throw(nullptr));
const auto exe_name = exe_path.filename().string();
const auto exe_bitness = util::is_x64() ? 64 : 32;
if (config.logging) {
logger = file_logger::create(self_directory / fmt::format("{}.log", PROJECT_NAME));
}
logger->info("🐨 {} v{}", PROJECT_NAME, PROJECT_VERSION);
logger->debug(R"(Process name: "{}" [{}-bit])", exe_name, exe_bitness);
is_hook_mode = hook::is_hook_mode(self_module, ORIGINAL_DLL);
if (is_hook_mode) {
hook::init(true);
#ifdef _WIN64
init_hook_mode();
#else
// TODO: Check if it's steam from valve
if (util::strings_are_equal(exe_name, "steam.exe")) {
koalageddon::init();
} else {
init_hook_mode();
}
#endif
} else {
init_proxy_mode();
}
logger->info("🚀 Initialization complete");
} catch (const Exception& ex) {
util::panic(fmt::format("Initialization error: {}", ex.what()));
}
}
void shutdown() {
try {
if (is_hook_mode) {
dll_monitor::shutdown();
} else {
win_util::free_library(original_library);
}
logger->info("💀 Shutdown complete");
} catch (const Exception& ex) {
logger->error("Shutdown error: {}", ex.what());
}
}
// FIXME: Support for app_id for koalageddon mode
bool should_unlock(uint32_t app_id) {
return config.unlock_all != config.override.contains(app_id);
}
}