mirror of
https://github.com/matrix-construct/construct
synced 2024-09-06 08:45:20 +02:00
534 lines
14 KiB
C++
534 lines
14 KiB
C++
/*
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* charybdis: A slightly useful ircd.
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* ircd.c: Starts up and runs the ircd.
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*
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* Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
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* Copyright (C) 1996-2002 Hybrid Development Team
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* Copyright (C) 2002-2008 ircd-ratbox development team
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* Copyright (C) 2005-2013 charybdis development team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* USA
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*/
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#include <ircd/asio.h>
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namespace ircd
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{
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extern const uint boost_version[3];
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enum runlevel _runlevel;
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const enum runlevel &runlevel{_runlevel};
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runlevel_handler runlevel_changed;
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boost::asio::io_service *ios; // user's io service
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struct strand *strand; // our main strand
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ctx::ctx *main_context;
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bool debugmode;
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void set_runlevel(const enum runlevel &);
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void enable_coredumps();
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void at_main_exit() noexcept;
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void main();
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}
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const std::thread::id
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ircd::static_thread_id
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{
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std::this_thread::get_id()
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};
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std::thread::id
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ircd::thread_id
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{};
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void
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ircd::init(boost::asio::io_service &ios,
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runlevel_handler function)
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{
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init(ios, std::string{}, std::move(function));
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}
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///
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/// Sets up the IRCd and its main context, then returns without blocking.
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//
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/// Pass your io_service instance, it will share it with the rest of your program.
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/// An exception will be thrown on error.
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///
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/// This function will setup the main program loop of libircd. The execution will
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/// occur when your io_service.run() or poll() is further invoked.
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///
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void
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ircd::init(boost::asio::io_service &ios,
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const std::string &configfile,
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runlevel_handler runlevel_changed)
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try
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{
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// cores are not dumped without consent of the user to maintain the privacy
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// of cryptographic key material in memory at the time of the crash.
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if(RB_DEBUG_LEVEL || debugmode)
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enable_coredumps();
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assert(runlevel == runlevel::STOPPED);
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ircd::thread_id = std::this_thread::get_id();
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ircd::ios = &ios;
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ircd::strand = new struct strand(ios);
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// The log is available, but it is console-only until conf opens files.
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log::init();
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log::mark("START");
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ircd::context main_context
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{
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"main", 256_KiB, &ircd::main, context::POST
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};
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ircd::main_context = main_context.detach();
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ircd::runlevel_changed = std::move(runlevel_changed);
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log::info("%s. boost %u.%u.%u. rocksdb %s. sodium %s.",
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PACKAGE_STRING,
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boost_version[0],
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boost_version[1],
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boost_version[2],
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db::version,
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nacl::version());
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log::info("%s %ld %s. configured: %s. compiled: %s %s",
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BRANDING_VERSION,
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__cplusplus,
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__VERSION__,
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RB_DATE_CONFIGURED,
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__TIMESTAMP__,
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RB_DEBUG_LEVEL? "(DEBUG MODE)" : "");
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ircd::set_runlevel(runlevel::READY);
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}
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catch(const std::exception &e)
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{
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delete strand;
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strand = nullptr;
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throw;
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}
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///
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/// Notifies IRCd to shutdown. A shutdown will occur asynchronously and this
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/// function will return immediately. main_exit_cb will be called when IRCd
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/// has no more work for the ios (main_exit_cb will be the last operation from
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/// IRCd posted to the ios).
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///
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/// This function is the proper way to shutdown libircd after an init(), and while
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/// your io_service.run() is invoked without stopping your io_service shared by
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/// other activities unrelated to libircd. If your io_service has no other activities
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/// the run() will then return.
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///
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/// This is useful when your other activities prevent run() from returning.
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///
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bool
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ircd::stop()
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noexcept
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{
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if(runlevel != runlevel::RUN)
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return false;
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if(!main_context)
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return false;
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ctx::notify(*main_context);
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return true;
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}
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/// Main context; Main program loop. Do not call this function directly.
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///
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/// This function manages the lifetime for all resources and subsystems
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/// that don't/can't have their own static initialization. When this
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/// function is entered, subsystem init objects are constructed on the
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/// frame. The lifetime of those objects is the handle to the lifetime
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/// of the subsystem, so destruction will shut down that subsystem.
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///
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/// The status of this function and IRCd overall can be observed through
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/// the ircd::runlevel. The ircd::runlevel_changed callback can be set
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/// to be notified on a runlevel change. The user should wait for a runlevel
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/// of STOPPED before destroying IRCd related resources and stopping their
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/// io_service from running more jobs.
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///
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void
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ircd::main()
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try
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{
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// When this function is entered IRCd will transition to START indicating
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// that subsystems are initializing.
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ircd::set_runlevel(runlevel::START);
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// When this function completes, subsystems are done shutting down and IRCd
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// transitions to STOPPED.
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const unwind stopped{[]
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{
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at_main_exit();
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set_runlevel(runlevel::STOPPED);
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}};
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// These objects are the init()'s and fini()'s for each subsystem.
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// Appearing here ties their life to the main context. Initialization can
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// also occur in ircd::init() or static initialization itself if either are
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// more appropriate.
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fs::init _fs_; // Local filesystem
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ctx::ole::init _ole_; // Thread OffLoad Engine
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nacl::init _nacl_; // nacl crypto
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net::init _net_; // Networking
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client::init _client_; // Client related
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db::init _db_; // RocksDB
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js::init _js_; // SpiderMonkey
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m::init _matrix_; // Matrix
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// IRCd will now transition to the RUN state indicating full functionality.
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ircd::set_runlevel(runlevel::RUN);
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// When the call to wait() below completes, IRCd exits from the RUN state
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// and enters one of the two states below depending on whether the unwind
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// is taking place normally or because of an exception.
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const unwind::nominal nominal{std::bind(&ircd::set_runlevel, runlevel::STOP)};
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const unwind::exceptional exceptional{std::bind(&ircd::set_runlevel, runlevel::FAULT)};
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// This call blocks until the main context is notified or interrupted etc.
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// Waiting here will hold open this stack with all of the above objects
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// living on it. Once this call completes this function effectively
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// executes backwards from this point and shuts down IRCd.
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ctx::wait();
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}
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catch(const ctx::interrupted &e)
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{
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log::warning("IRCd main interrupted...");
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}
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catch(const std::exception &e)
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{
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log::critical("IRCd terminated: %s", e.what());
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std::terminate();
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}
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void
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ircd::at_main_exit()
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noexcept
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{
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strand->post([]
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{
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delete strand;
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strand = nullptr;
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});
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}
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void
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ircd::set_runlevel(const enum runlevel &new_runlevel)
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try
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{
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log::debug("IRCd runlevel transition from '%s' to '%s'%s",
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reflect(ircd::runlevel),
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reflect(new_runlevel),
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ircd::runlevel_changed? " (notifying user)" : "");
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ircd::_runlevel = new_runlevel;
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// This function will notify the user of the change to IRCd. The
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// notification is posted to the io_service ensuring THERE IS NO
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// CONTINUATION ON THIS STACK by the user.
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if(ircd::runlevel_changed)
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ios->post([new_runlevel]
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{
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ircd::runlevel_changed(new_runlevel);
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});
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log::notice("IRCd %s", reflect(ircd::runlevel));
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}
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catch(const std::exception &e)
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{
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log::critical("IRCd runlevel change to '%s': %s",
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reflect(new_runlevel),
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e.what());
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std::terminate();
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}
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ircd::string_view
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ircd::reflect(const enum runlevel &level)
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{
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switch(level)
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{
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case runlevel::FAULT: return "FAULT";
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case runlevel::STOPPED: return "STOPPED";
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case runlevel::READY: return "READY";
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case runlevel::START: return "START";
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case runlevel::RUN: return "RUN";
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case runlevel::STOP: return "STOP";
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}
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return "??????";
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}
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const uint
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ircd::boost_version[3]
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{
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BOOST_VERSION / 100000,
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BOOST_VERSION / 100 % 1000,
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BOOST_VERSION % 100,
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};
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void
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#ifdef HAVE_SYS_RESOURCE_H
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ircd::enable_coredumps()
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try
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{
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//
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// Setup corefile size immediately after boot -kre
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//
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rlimit rlim; // resource limits
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syscall(getrlimit, RLIMIT_CORE, &rlim);
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// Set corefilesize to maximum
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rlim.rlim_cur = rlim.rlim_max;
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syscall(setrlimit, RLIMIT_CORE, &rlim);
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}
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catch(const std::exception &e)
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{
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std::cerr << "Failed to adjust rlimit: " << e.what() << std::endl;
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}
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#else
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ircd::enable_coredumps()
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{
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}
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#endif
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// namespace ircd {
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/* /quote set variables */
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/*
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struct SetOptions GlobalSetOptions;
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struct Counter Count;
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struct ServerStatistics ServerStats;
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struct ev_entry *check_splitmode_ev;
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int maxconnections;
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//struct LocalUser meLocalUser; // That's also part of me
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rb_dlink_list global_client_list;
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*/
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/* unknown/client pointer lists */
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//rb_dlink_list unknown_list; /* unknown clients ON this server only */
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//rb_dlink_list lclient_list; /* local clients only ON this server */
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//rb_dlink_list serv_list; /* local servers to this server ONLY */
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//rb_dlink_list global_serv_list; /* global servers on the network */
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//rb_dlink_list local_oper_list; /* our opers, duplicated in lclient_list */
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//rb_dlink_list oper_list; /* network opers */
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/*
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char * const *myargv;
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volatile sig_atomic_t dorehash = false;
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volatile sig_atomic_t dorehashbans = false;
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volatile sig_atomic_t doremotd = false;
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bool kline_queued = false;
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bool server_state_foreground = true;
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bool opers_see_all_users = false;
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bool ircd_ssl_ok = false;
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bool ircd_zlib_ok = true;
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int testing_conf = 0;
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//time_t startup_time;
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int default_server_capabs;
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int splitmode;
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int splitchecking;
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int split_users;
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int split_servers;
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int eob_count;
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*/
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// }
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/*
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static void
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check_rehash(void *unused)
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{
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if(dorehash)
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{
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rehash(true);
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dorehash = false;
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}
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if(dorehashbans)
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{
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rehash_bans();
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dorehashbans = false;
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}
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if(doremotd)
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{
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sendto_realops_snomask(sno::GENERAL, L_ALL,
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"Got signal SIGUSR1, reloading ircd motd file");
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cache::motd::cache_user();
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doremotd = false;
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}
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}
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*/
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/*
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* initalialize_global_set_options
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*
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* inputs - none
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* output - none
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* side effects - This sets all global set options needed
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*/
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/*
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static void
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initialize_global_set_options(void)
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{
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memset(&GlobalSetOptions, 0, sizeof(GlobalSetOptions));
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// memset( &ConfigFileEntry, 0, sizeof(ConfigFileEntry));
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GlobalSetOptions.maxclients = ServerInfo.default_max_clients;
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if(GlobalSetOptions.maxclients > (maxconnections - MAX_BUFFER) || (GlobalSetOptions.maxclients <= 0))
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GlobalSetOptions.maxclients = maxconnections - MAX_BUFFER;
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GlobalSetOptions.autoconn = 1;
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GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
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GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT;
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GlobalSetOptions.floodcount = ConfigFileEntry.default_floodcount;
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split_servers = ConfigChannel.default_split_server_count;
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split_users = ConfigChannel.default_split_user_count;
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if(split_users && split_servers
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&& (ConfigChannel.no_create_on_split || ConfigChannel.no_join_on_split))
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{
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splitmode = 1;
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splitchecking = 1;
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}
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GlobalSetOptions.ident_timeout = ConfigFileEntry.default_ident_timeout;
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rb_strlcpy(GlobalSetOptions.operstring,
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ConfigFileEntry.default_operstring,
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sizeof(GlobalSetOptions.operstring));
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rb_strlcpy(GlobalSetOptions.adminstring,
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ConfigFileEntry.default_adminstring,
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sizeof(GlobalSetOptions.adminstring));
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}
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*/
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// initialise operhash fairly early.
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//init_operhash();
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//me.localClient = &meLocalUser;
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//rb_dlinkAddTail(&me, &me.node, &global_client_list);
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//init_builtin_capabs();
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//default_server_capabs = CAP_MASK;
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//newconf_init();
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//init_s_conf();
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//init_s_newconf();
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//init_hash();
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//init_host_hash();
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//client::init();
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//init_hook();
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//chan::init();
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//initclass();
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//whowas::init();
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//init_reject();
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//cache::init();
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//init_monitor();
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//chan::mode::init();
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//init_authd(); /* Start up authd. */
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//init_dns(); /* Start up DNS query system */
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//privilegeset_set_new("default", "", 0);
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//read_conf_files(true); /* cold start init conf files */
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//mods::autoload();
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//supported::init();
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//init_bandb();
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//init_ssld();
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//init_wsockd();
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//rehash_bans();
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//default_server_capabs &= ~CAP_ZIP; // Set up default_server_capabs
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//initialize_global_set_options();
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/*
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if(ServerInfo.name == NULL)
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throw error("no server name specified in serverinfo block.");
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rb_strlcpy(me.name, ServerInfo.name, sizeof(me.name));
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if(ServerInfo.sid[0] == '\0')
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throw error("no server sid specified in serverinfo block.");
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rb_strlcpy(me.id, ServerInfo.sid, sizeof(me.id));
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//client::init_uid();
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// serverinfo{} description must exist. If not, error out.
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if(ServerInfo.description == NULL)
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throw error("no server description specified in serverinfo block.");
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rb_strlcpy(me.info, ServerInfo.description, sizeof(me.info));
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*/
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/*
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if(ServerInfo.ssl_cert != NULL)
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{
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// just do the rb_setup_ssl_server to validate the config
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if(!rb_setup_ssl_server(ServerInfo.ssl_cert, ServerInfo.ssl_private_key, ServerInfo.ssl_dh_params, ServerInfo.ssl_cipher_list))
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{
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ilog(L_MAIN, "WARNING: Unable to setup SSL.");
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ircd_ssl_ok = false;
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}
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else
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ircd_ssl_ok = true;
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}
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*/
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//me.from = &me;
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//me.servptr = &me;
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//set_me(me);
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//make_serv(me);
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//add_to_client_hash(me.name, &me);
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//add_to_id_hash(me.id, &me);
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//nameinfo(serv(me)) = cache::serv::connect(me.name, me.info);
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//rb_dlinkAddAlloc(&me, &global_serv_list);
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//check_class();
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//cache::help::load();
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//configure_authd();
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/* We want try_connections to be called as soon as possible now! -- adrian */
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/* No, 'cause after a restart it would cause all sorts of nick collides */
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/* um. by waiting even longer, that just means we have even *more*
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* nick collisions. what a stupid idea. set an event for the IO loop --fl
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*/
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// rb_event_addish("try_connections", try_connections, NULL, STARTUP_CONNECTIONS_TIME);
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// rb_event_addonce("try_connections_startup", try_connections, NULL, 2);
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// rb_event_add("check_rehash", check_rehash, NULL, 3);
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// rb_event_addish("reseed_srand", seed_random, NULL, 300); /* reseed every 10 minutes */
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// if(splitmode)
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// check_splitmode_ev = rb_event_add("check_splitmode", chan::check_splitmode, NULL, 5);
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