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336 lines
8.3 KiB
C++
336 lines
8.3 KiB
C++
#include <config/config.hpp> // for ensure_config
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#include <constants/version.hpp>
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#include <llarp.h>
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#include <util/fs.hpp>
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#include <util/logging/logger.hpp>
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#include <util/logging/ostream_logger.hpp>
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#include <csignal>
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#if !defined(_WIN32) && !defined(__OpenBSD__)
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#include <wordexp.h>
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#endif
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#include <cxxopts.hpp>
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#include <string>
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#include <iostream>
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#include <future>
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#ifdef _WIN32
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#define wmin(x, y) (((x) < (y)) ? (x) : (y))
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#define MIN wmin
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extern "C" LONG FAR PASCAL
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win32_signal_handler(EXCEPTION_POINTERS *);
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#endif
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struct llarp_main *ctx = 0;
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std::promise< int > exit_code;
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void
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handle_signal(int sig)
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{
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if(ctx)
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{
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llarp_main_signal(ctx, sig);
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}
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}
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#ifdef _WIN32
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int
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startWinsock()
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{
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WSADATA wsockd;
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int err;
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err = ::WSAStartup(MAKEWORD(2, 2), &wsockd);
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if(err)
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{
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perror("Failed to start Windows Sockets");
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return err;
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}
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return 0;
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}
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extern "C" BOOL FAR PASCAL
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handle_signal_win32(DWORD fdwCtrlType)
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{
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UNREFERENCED_PARAMETER(fdwCtrlType);
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handle_signal(SIGINT);
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return TRUE; // probably unreachable
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}
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#endif
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/// resolve ~ and symlinks into actual paths (so we know the real path on disk,
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/// to remove assumptions and confusion with permissions)
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std::string
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resolvePath(std::string conffname)
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{
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// implemented in netbsd, removed downstream for security reasons
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// even though it is defined by POSIX.1-2001+
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#if !defined(_WIN32) && !defined(__OpenBSD__)
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wordexp_t exp_result;
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wordexp(conffname.c_str(), &exp_result, 0);
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char *resolvedPath = realpath(exp_result.we_wordv[0], NULL);
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if(!resolvedPath)
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{
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// relative paths don't need to be resolved
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// llarp::LogWarn("Can't resolve path: ", exp_result.we_wordv[0]);
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return conffname;
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}
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return resolvedPath;
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#else
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// TODO(despair): dig through LLVM local patch set
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// one of these exists deep in the bowels of LLVMSupport
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return conffname; // eww, easier said than done outside of cygwin
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#endif
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}
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/// this sets up, configures and runs the main context
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static void
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run_main_context(std::string conffname, llarp_main_runtime_opts opts)
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{
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// this is important, can downgrade from Info though
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llarp::LogDebug("Running from: ", fs::current_path().string());
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llarp::LogInfo("Using config file: ", conffname);
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ctx = llarp_main_init(conffname.c_str());
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int code = 1;
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if(ctx)
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{
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signal(SIGINT, handle_signal);
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signal(SIGTERM, handle_signal);
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#ifndef _WIN32
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signal(SIGHUP, handle_signal);
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#endif
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code = llarp_main_setup(ctx);
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llarp::util::SetThreadName("llarp-mainloop");
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if(code == 0)
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code = llarp_main_run(ctx, opts);
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llarp_main_free(ctx);
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}
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exit_code.set_value(code);
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}
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int
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main(int argc, char *argv[])
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{
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llarp_main_runtime_opts opts;
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const char *singleThreadVar = getenv("LLARP_SHADOW");
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if(singleThreadVar && std::string(singleThreadVar) == "1")
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{
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opts.singleThreaded = true;
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}
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#ifdef _WIN32
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if(startWinsock())
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return -1;
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SetConsoleCtrlHandler(handle_signal_win32, TRUE);
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// SetUnhandledExceptionFilter(win32_signal_handler);
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#endif
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#ifdef LOKINET_DEBUG
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absl::SetMutexDeadlockDetectionMode(absl::OnDeadlockCycle::kAbort);
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#endif
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// clang-format off
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cxxopts::Options options(
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"lokinet",
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"LokiNET is a free, open source, private, decentralized, \"market based sybil resistant\" and IP based onion routing network"
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);
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options.add_options()
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("v,verbose", "Verbose", cxxopts::value<bool>())
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("h,help", "help", cxxopts::value<bool>())
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("version", "version", cxxopts::value<bool>())
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("g,generate", "generate client config", cxxopts::value<bool>())
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("r,router", "generate router config", cxxopts::value<bool>())
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("f,force", "overwrite", cxxopts::value<bool>())
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("c,colour", "colour output", cxxopts::value<bool>()->default_value("true"))
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("b,background", "background mode (start, but do not connect to the network)", cxxopts::value<bool>())
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("config","path to configuration file", cxxopts::value<std::string>());
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options.parse_positional("config");
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// clang-format on
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bool genconfigOnly = false;
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bool asRouter = false;
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bool overWrite = false;
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std::string conffname; // suggestions: confFName? conf_fname?
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try
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{
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auto result = options.parse(argc, argv);
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if(result.count("verbose") > 0)
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{
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SetLogLevel(llarp::eLogDebug);
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llarp::LogDebug("debug logging activated");
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}
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if(!result["colour"].as< bool >())
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{
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llarp::LogContext::Instance().logStream =
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std::make_unique< llarp::OStreamLogStream >(false, std::cerr);
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}
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if(result.count("help"))
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{
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std::cout << options.help() << std::endl;
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return 0;
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}
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if(result.count("version"))
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{
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std::cout << llarp_version() << std::endl;
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return 0;
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}
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if(result.count("generate") > 0)
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{
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genconfigOnly = true;
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}
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if(result.count("background") > 0)
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{
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opts.background = true;
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}
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if(result.count("force") > 0)
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{
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overWrite = true;
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}
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if(result.count("router") > 0)
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{
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asRouter = true;
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// we should generate and exit (docker needs this, so we don't write a
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// config each time on startup)
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genconfigOnly = true;
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}
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if(result.count("config") > 0)
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{
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auto arg = result["config"].as< std::string >();
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if(!arg.empty())
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{
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conffname = arg;
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}
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}
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}
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catch(const cxxopts::option_not_exists_exception &ex)
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{
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std::cerr << ex.what();
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std::cout << options.help() << std::endl;
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return 1;
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}
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if(!conffname.empty())
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{
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// when we have an explicit filepath
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fs::path fname = fs::path(conffname);
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fs::path basedir = fname.parent_path();
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conffname = fname.string();
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conffname = resolvePath(conffname);
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std::error_code ec;
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// llarp::LogDebug("Basedir: ", basedir);
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if(basedir.string().empty())
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{
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// relative path to config
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// does this file exist?
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if(genconfigOnly)
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{
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if(!llarp_ensure_config(conffname.c_str(), basedir.string().c_str(),
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overWrite, asRouter))
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return 1;
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}
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else
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{
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if(!fs::exists(fname, ec))
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{
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llarp::LogError("Config file not found ", conffname);
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return 1;
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}
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}
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}
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else
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{
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// absolute path to config
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if(!fs::create_directories(basedir, ec))
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{
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if(ec)
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{
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llarp::LogError("failed to create '", basedir.string(),
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"': ", ec.message());
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return 1;
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}
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}
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if(genconfigOnly)
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{
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// find or create file
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if(!llarp_ensure_config(conffname.c_str(), basedir.string().c_str(),
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overWrite, asRouter))
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return 1;
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}
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else
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{
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// does this file exist?
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if(!fs::exists(conffname, ec))
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{
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llarp::LogError("Config file not found ", conffname);
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return 1;
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}
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}
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}
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}
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else
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{
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// no explicit config file provided
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#ifdef _WIN32
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fs::path homedir = fs::path(getenv("APPDATA"));
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#else
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fs::path homedir = fs::path(getenv("HOME"));
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#endif
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fs::path basepath = homedir / fs::path(".lokinet");
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fs::path fpath = basepath / "lokinet.ini";
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// I don't think this is necessary with this condition
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// conffname = resolvePath(conffname);
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llarp::LogDebug("Find or create ", basepath.string());
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std::error_code ec;
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// These paths are guaranteed to exist - $APPDATA or $HOME
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// so only create .lokinet/*
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if(!fs::create_directory(basepath, ec))
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{
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if(ec)
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{
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llarp::LogError("failed to create '", basepath.string(),
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"': ", ec.message());
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return 1;
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}
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}
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// if using default INI file, we're create it even if you don't ask us too
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if(!llarp_ensure_config(fpath.string().c_str(), basepath.string().c_str(),
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overWrite, asRouter))
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return 1;
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conffname = fpath.string();
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}
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if(genconfigOnly)
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{
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return 0;
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}
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std::thread main_thread{std::bind(&run_main_context, conffname, opts)};
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auto ftr = exit_code.get_future();
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do
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{
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// do periodic non lokinet related tasks here
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} while(ftr.wait_for(std::chrono::seconds(1)) != std::future_status::ready);
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main_thread.join();
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const auto code = ftr.get();
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#ifdef _WIN32
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::WSACleanup();
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#endif
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return code;
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}
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