mirror of
https://github.com/matrix-construct/construct
synced 2024-11-17 23:40:57 +01:00
492 lines
12 KiB
C++
492 lines
12 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 <boost/asio.hpp>
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#include <ircd/ctx_ctx.h>
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#include <ircd/js.h>
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namespace ircd
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{
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bool debugmode; // set by command line
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boost::asio::io_service *ios; // user's io service
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std::shared_ptr<client> me; // That's me
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main_exit_cb main_exit_func; // Called when main context exits
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bool main_exited; // Set when IRCd is finished
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void seed_random();
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void init_system();
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void main_exiting() noexcept;
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void handle_sigusr2();
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void handle_sigusr1();
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void handle_sigterm();
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void handle_sigquit();
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void main() noexcept;
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}
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//
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// Sets up the IRCd, handlers (main context), and then returns without blocking.
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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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void
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ircd::init(boost::asio::io_service &io_service,
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const std::string &configfile,
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main_exit_cb main_exit_func)
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{
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ircd::ios = &io_service;
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init_system();
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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("log started");
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// The configuration is parsed for grammatical errors only. It is not evaluated.
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log::info("parsing your configuration");
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conf::parse(configfile);
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// The caller has no other way to know IRCd has halted as everyone shares the
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// same io_service, which may not return if the caller has their own tasks.
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at_main_exit(std::move(main_exit_func));
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// The master of ceremonies runs the show after this function returns and ios.run().
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// The SELF_DESTRUCT flag indicates it will clean itself up and cannot join here.
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log::debug("spawning main context");
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context(8_MiB, ircd::main, ctx::DEFER_POST | ctx::SELF_DESTRUCT);
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log::debug("IRCd initialization completed.");
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}
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//
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// Main context; Main program loop.
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// This function is spawned by init(). Do not call this function.
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//
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void
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ircd::main()
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noexcept try
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{
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log::debug("IRCd entered main context.");
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const scope main_exit(&main_exiting); // The user is notified when this function ends
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// These objects are the init()'s and fini()'s for each subsystem. Appearing here ties them
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// to the main context. Initialization can also occur in ircd::init() if static initialization
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// and destruction is not possible, but there is no complementary destruction up there.
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ctx::ole::init _ole_;
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mods::init _mods_;
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db::init _db_;
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js::init _js_;
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client_init _client_;
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// Create IRCd's agency
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ircd::me = add_client();
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// This is where the configuration is finally evalulated. This must occur
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// in a context which can block. If execute() does not transact successfully
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// IRCd never reaches the main loop and aborts.
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log::info("executing configuration");
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conf::execute();
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log::debug("setting up signals");
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boost::asio::signal_set sigfd(*ios);
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sigfd.add(SIGTERM);
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sigfd.add(SIGQUIT);
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sigfd.add(SIGUSR1);
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sigfd.add(SIGUSR2);
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// This is the main program loop. All it does is handle signals.
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// The configuration will have spawned other loops.
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log::notice("IRCd ready");
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do switch(sigfd.async_wait(yield(continuation())))
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{
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case SIGTERM: handle_sigterm(); return;
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case SIGQUIT: handle_sigquit(); return;
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case SIGUSR1: handle_sigusr1(); continue;
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case SIGUSR2: handle_sigusr2(); continue;
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}
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while(1);
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}
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catch(const std::exception &e)
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{
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log::error("IRCd finished: %s", e.what());
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}
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void
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ircd::handle_sigterm()
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{
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using namespace ircd;
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log::notice("IRCd finished: SIGTERM");
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}
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void
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ircd::handle_sigquit()
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{
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using namespace ircd;
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log::notice("SIGQUIT. Quitting...");
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}
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void
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ircd::handle_sigusr1()
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{
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using namespace ircd;
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log::notice("SIGUSR1. Rehashing configuration...");
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// dorehash (no longer hangup!)
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}
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void
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ircd::handle_sigusr2()
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{
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using namespace ircd;
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log::notice("SIGUSR2. Flushing caches...");
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// dorehashbans
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// doremotd
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}
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//
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// Cleanup function for the main context.
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//
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void
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ircd::main_exiting()
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noexcept try
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{
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if(main_exit_func)
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{
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// This function will notify the user of IRCd shutdown. The notification is
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// posted to the io_service ensuring THERE IS NO CONTINUATION ON THIS STACK by
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// the user, who is then free to destruct all elements of IRCd.
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log::debug("Notifying user of IRCd completion");
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ios->post(main_exit_func);
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}
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main_exited = true;
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}
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catch(const std::exception &e)
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{
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log::critical("main context exit: %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(main_exit_cb main_exit_func)
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{
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ircd::main_exit_func = std::move(main_exit_func);
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}
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void
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ircd::init_system()
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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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#ifdef HAVE_SYS_RESOURCE_H
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struct rlimit rlim; /* resource limits */
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/* Set corefilesize to maximum */
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if(!getrlimit(RLIMIT_CORE, &rlim))
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{
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rlim.rlim_cur = rlim.rlim_max;
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setrlimit(RLIMIT_CORE, &rlim);
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}
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#endif
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rb_set_time();
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rb_init_prng(NULL, RB_PRNG_DEFAULT);
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seed_random();
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}
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static bool
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seed_with_urandom()
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{
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unsigned int seed;
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int fd;
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fd = open("/dev/urandom", O_RDONLY);
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if(fd >= 0)
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{
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if(read(fd, &seed, sizeof(seed)) == sizeof(seed))
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{
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close(fd);
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srand(seed);
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return true;
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}
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close(fd);
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}
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return false;
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}
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static void
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seed_with_clock()
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{
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const struct timeval *tv;
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rb_set_time();
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tv = rb_current_time_tv();
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srand(tv->tv_sec ^ (tv->tv_usec | (getpid() << 20)));
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}
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void
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ircd::seed_random()
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{
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unsigned int seed;
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if(rb_get_random(&seed, sizeof(seed)) == -1)
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{
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if(!seed_with_urandom())
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seed_with_clock();
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return;
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}
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srand(seed);
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}
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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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static void
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initialize_global_set_options(void)
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{
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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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