The daemon consists of global settings and a number of workers. More...

#include "config.h"
#include <ldns/ldns.h>
#include "daemon/daemon.h"
#include "daemon/worker.h"
#include "daemon/remote.h"
#include "daemon/acl_list.h"
#include "util/log.h"
#include "util/config_file.h"
#include "util/data/msgreply.h"
#include "util/storage/lookup3.h"
#include "util/storage/slabhash.h"
#include "services/listen_dnsport.h"
#include "services/cache/rrset.h"
#include "services/cache/infra.h"
#include "services/localzone.h"
#include "services/modstack.h"
#include "util/module.h"
#include "util/random.h"
#include "util/tube.h"
#include <signal.h>

Functions
static RETSIGTYPE	record_sigh (int sig)
	used when no other sighandling happens, so we don't die when multiple signals in quick succession are sent to us.
static void	signal_handling_record (void)
	Signal handling during the time when netevent is disabled.
static void	signal_handling_playback (struct worker *wrk)
	Replay old signals.
struct daemon *	daemon_init (void)
	Initialize daemon structure.
int	daemon_open_shared_ports (struct daemon *daemon)
	Open shared listening ports (if needed).
static void	daemon_setup_modules (struct daemon *daemon)
	Setup modules.
static int	daemon_get_shufport (struct daemon daemon, int shufport)
	Obtain allowed port numbers, concatenate the list, and shuffle them (ready to be handed out to threads).
static void	daemon_create_workers (struct daemon *daemon)
	Allocate empty worker structures.
static void *	thread_start (void *arg)
	Function to start one thread.
static void	daemon_start_others (struct daemon *daemon)
	Fork and init the other threads.
static void	daemon_stop_others (struct daemon *daemon)
	Stop the other threads.
void	daemon_fork (struct daemon *daemon)
	Fork workers and start service.
void	daemon_cleanup (struct daemon *daemon)
	Close off the worker thread information.
void	daemon_delete (struct daemon *daemon)
	Delete workers, close listening ports.
void	daemon_apply_cfg (struct daemon daemon, struct config_file cfg)
	Apply config settings.
Variables
static int	sig_record_quit = 0
	How many quit requests happened.
static int	sig_record_reload = 0
	How many reload requests happened.

Detailed Description

The daemon consists of global settings and a number of workers.

Function Documentation

static RETSIGTYPE record_sigh ( int sig ) [static]

used when no other sighandling happens, so we don't die when multiple signals in quick succession are sent to us.

Parameters:

sig,: signal number.

Returns:: signal handler return type (void or int).

References log_err(), sig_record_quit, sig_record_reload, VERB_OPS, and verbose().

Referenced by signal_handling_record().

static void signal_handling_record ( void ) [static]

Signal handling during the time when netevent is disabled.

Stores signals to replay later.

References log_err(), and record_sigh().

Referenced by daemon_cleanup(), and daemon_init().

static void signal_handling_playback ( struct worker * wrk ) [static]

Replay old signals.

Parameters:

wrk,: worker that handles signals.

References sig_record_quit, sig_record_reload, and worker_sighandler().

Referenced by daemon_fork().

struct daemon* daemon_init ( void ) [read]

Initialize daemon structure.

Returns:: : The daemon structure, or NULL on error.

References daemon::acl, acl_list_create(), alloc_init(), daemon::env, fatal_exit(), log_err(), daemon::mods, modstack_init(), daemon::need_to_exit, signal_handling_record(), daemon::superalloc, daemon::time_boot, daemon::time_last_stat, and ub_systemseed().

Referenced by run_daemon(), and service_init().

int daemon_open_shared_ports ( struct daemon * daemon )

Open shared listening ports (if needed).

The cfg member pointer must have been set for the daemon.

Parameters:

daemon,: the daemon.

Returns:: : false on error.

References daemon::cfg, config_file::control_port, daemon_remote_open_ports(), daemon::listening_port, listening_ports_free(), listening_ports_open(), log_assert, config_file::port, daemon::ports, daemon::rc_port, daemon::rc_ports, and config_file::remote_control_enable.

Referenced by run_daemon(), and service_init().

static void daemon_setup_modules ( struct daemon * daemon ) [static]

Setup modules.

setup module stack.

Parameters:

daemon,: the daemon

References module_env::alloc, daemon::cfg, module_env::cfg, daemon::env, fatal_exit(), daemon::mods, modstack_setup(), config_file::module_conf, module_env::need_to_validate, daemon::superalloc, and module_env::worker.

Referenced by daemon_fork().

static int daemon_get_shufport	(	struct daemon *	daemon,
		int *	shufport
	)		`[static]`

Obtain allowed port numbers, concatenate the list, and shuffle them (ready to be handed out to threads).

Parameters:

daemon,:	the daemon. Uses rand and cfg.
shufport,:	the portlist output.

Returns:: number of ports available.

References daemon::cfg, fatal_exit(), config_file::outgoing_avail_ports, daemon::rand, and ub_random_max().

Referenced by daemon_create_workers().

static void daemon_create_workers ( struct daemon * daemon ) [static]

Allocate empty worker structures.

With backptr and thread-number, from 0..numthread initialised. Used as user arguments to new threads. Creates the daemon random generator if it does not exist yet. The random generator stays existing between reloads with a unique state.

Parameters:

daemon,: the daemon with (new) config settings.

References daemon::cfg, daemon_get_shufport(), fatal_exit(), log_assert, daemon::num, config_file::num_threads, daemon::rand, ub_initstate(), ub_random(), VERB_ALGO, verbose(), worker_create(), and daemon::workers.