165 lines
4.9 KiB
C
165 lines
4.9 KiB
C
/*
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* daemon/daemon.h - collection of workers that handles requests.
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*
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* Copyright (c) 2007, NLnet Labs. All rights reserved.
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*
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* This software is open source.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* Neither the name of the NLNET LABS nor the names of its contributors may
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* be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* \file
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*
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* The daemon consists of global settings and a number of workers.
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*/
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#ifndef DAEMON_H
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#define DAEMON_H
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#include "util/locks.h"
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#include "util/alloc.h"
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#include "services/modstack.h"
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#ifdef UB_ON_WINDOWS
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# include "util/winsock_event.h"
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#endif
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struct config_file;
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struct worker;
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struct listen_port;
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struct slabhash;
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struct module_env;
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struct rrset_cache;
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struct acl_list;
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struct local_zones;
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struct ub_randstate;
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struct daemon_remote;
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#include "dnstap/dnstap_config.h"
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#ifdef USE_DNSTAP
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struct dt_env;
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#endif
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/**
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* Structure holding worker list.
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* Holds globally visible information.
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*/
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struct daemon {
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/** The config settings */
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struct config_file* cfg;
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/** the chroot dir in use, NULL if none */
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char* chroot;
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/** pidfile that is used */
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char* pidfile;
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/** port number that has ports opened. */
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int listening_port;
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/** array of listening ports, opened. Listening ports per worker,
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* or just one element[0] shared by the worker threads. */
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struct listen_port** ports;
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/** size of ports array */
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size_t num_ports;
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/** reuseport is enabled if true */
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int reuseport;
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/** port number for remote that has ports opened. */
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int rc_port;
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/** listening ports for remote control */
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struct listen_port* rc_ports;
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/** remote control connections management (for first worker) */
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struct daemon_remote* rc;
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/** ssl context for listening to dnstcp over ssl, and connecting ssl */
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void* listen_sslctx, *connect_sslctx;
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/** num threads allocated */
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int num;
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/** the worker entries */
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struct worker** workers;
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/** do we need to exit unbound (or is it only a reload?) */
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int need_to_exit;
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/** master random table ; used for port div between threads on reload*/
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struct ub_randstate* rand;
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/** master allocation cache */
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struct alloc_cache superalloc;
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/** the module environment master value, copied and changed by threads*/
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struct module_env* env;
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/** stack of module callbacks */
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struct module_stack mods;
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/** access control, which client IPs are allowed to connect */
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struct acl_list* acl;
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/** local authority zones */
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struct local_zones* local_zones;
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/** last time of statistics printout */
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struct timeval time_last_stat;
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/** time when daemon started */
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struct timeval time_boot;
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#ifdef USE_DNSTAP
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/** the dnstap environment master value, copied and changed by threads*/
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struct dt_env* dtenv;
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#endif
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};
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/**
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* Initialize daemon structure.
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* @return: The daemon structure, or NULL on error.
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*/
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struct daemon* daemon_init(void);
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/**
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* Open shared listening ports (if needed).
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* The cfg member pointer must have been set for the daemon.
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* @param daemon: the daemon.
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* @return: false on error.
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*/
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int daemon_open_shared_ports(struct daemon* daemon);
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/**
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* Fork workers and start service.
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* When the routine exits, it is no longer forked.
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* @param daemon: the daemon.
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*/
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void daemon_fork(struct daemon* daemon);
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/**
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* Close off the worker thread information.
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* Bring the daemon back into state ready for daemon_fork again.
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* @param daemon: the daemon.
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*/
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void daemon_cleanup(struct daemon* daemon);
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/**
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* Delete workers, close listening ports.
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* @param daemon: the daemon.
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*/
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void daemon_delete(struct daemon* daemon);
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/**
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* Apply config settings.
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* @param daemon: the daemon.
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* @param cfg: new config settings.
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*/
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void daemon_apply_cfg(struct daemon* daemon, struct config_file* cfg);
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#endif /* DAEMON_H */
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