ntpd.h

网络时间协议NTP 源码 版本v4.2.0b 该源码用于linux平台下

/*
 * Variable declarations for ntpd.
 */

/* ntp_config.c */
extern char const *	progname;
extern char	*sys_phone[];		/* ACTS phone numbers */
#if defined(HAVE_SCHED_SETSCHEDULER)
extern int	config_priority_override;
extern int	config_priority;
#endif

/* ntp_control.c */
extern int	num_ctl_traps;
extern keyid_t	ctl_auth_keyid;		/* keyid used for authenticating write requests */

/*
 * Statistic counters to keep track of requests and responses.
 */
extern u_long	ctltimereset;		/* time stats reset */
extern u_long	numctlreq;		/* number of requests we've received */
extern u_long	numctlbadpkts;		/* number of bad control packets */
extern u_long	numctlresponses; 	/* number of resp packets sent with data */
extern u_long	numctlfrags; 		/* number of fragments sent */
extern u_long	numctlerrors;		/* number of error responses sent */
extern u_long	numctltooshort;		/* number of too short input packets */
extern u_long	numctlinputresp; 	/* number of responses on input */
extern u_long	numctlinputfrag; 	/* number of fragments on input */
extern u_long	numctlinputerr;		/* number of input pkts with err bit set */
extern u_long	numctlbadoffset; 	/* number of input pkts with nonzero offset */
extern u_long	numctlbadversion;	/* number of input pkts with unknown version */
extern u_long	numctldatatooshort;	/* data too short for count */
extern u_long	numctlbadop; 		/* bad op code found in packet */
extern u_long	numasyncmsgs;		/* number of async messages we've sent */

/* ntp_intres.c */
extern keyid_t	req_keyid;		/* request keyid */
extern char *	req_file;		/* name of the file with configuration info */

/*
 * Other statistics of possible interest
 */
extern volatile u_long packets_dropped;	/* total number of packets dropped on reception */
extern volatile u_long packets_ignored;	/* packets received on wild card interface */
extern volatile u_long packets_received;/* total number of packets received */
extern u_long	packets_sent;		/* total number of packets sent */
extern u_long	packets_notsent; 	/* total number of packets which couldn't be sent */

extern volatile u_long handler_calls;	/* number of calls to interrupt handler */
extern volatile u_long handler_pkts;	/* number of pkts received by handler */
extern u_long	io_timereset;		/* time counters were reset */

/*
 * Interface stuff
 */
extern struct interface *any_interface;	/* default ipv4 interface */
extern struct interface *any6_interface;/* default ipv6 interface */
extern struct interface *loopback_interface; /* loopback interface */

/*
 * File descriptor masks etc. for call to select
 */
extern fd_set	activefds;
extern int	maxactivefd;

/* ntp_loopfilter.c */
extern double	drift_comp;		/* clock frequency (s/s) */
extern double	clock_stability;	/* clock stability (s/s) */
extern double	clock_max;		/* max offset before step (s) */
extern double	clock_panic;		/* max offset before panic (s) */
extern double	clock_phi;		/* dispersion rate (s/s) */
extern double	clock_minstep;		/* step timeout (s) */
extern u_long	pps_control;		/* last pps sample time */
#ifdef KERNEL_PLL
extern int	pll_status;		/* status bits for kernel pll */
#endif /* KERNEL_PLL */

/*
 * Clock state machine control flags
 */
extern int	ntp_enable;		/* clock discipline enabled */
extern int	pll_control;		/* kernel support available */
extern int	kern_enable;		/* kernel support enabled */
extern int	pps_enable;		/* kernel PPS discipline enabled */
extern int	ext_enable;		/* external clock enabled */
extern int	cal_enable;		/* refclock calibrate enable */
extern int	allow_panic;		/* allow panic correction */
extern int	mode_ntpdate;		/* exit on first clock set */
extern int	peer_ntpdate;		/* count of ntpdate peers */
extern int	forground_process;	/* run the process in the forground */

/*
 * Clock state machine variables
 */
extern u_char	sys_poll;		/* system poll interval (log2 s) */
extern int	state;			/* clock discipline state */
extern int	tc_counter;		/* poll-adjust counter */
extern u_long	last_time;		/* time of last clock update (s) */
extern double	last_offset;		/* last clock offset (s) */
extern double	allan_xpt;		/* Allan intercept (s) */
extern double	clock_jitter;		/* clock jitter (s) */
extern double	sys_jitter;		/* system jitter (s) */

/* ntp_monitor.c */
extern struct mon_data mon_mru_list;
extern struct mon_data mon_fifo_list;
extern int	mon_enabled;

/* ntp_peer.c */
extern struct peer *peer_hash[];	/* peer hash table */
extern int	peer_hash_count[];	/* count of peers in each bucket */
extern struct peer *assoc_hash[];	/* association ID hash table */
extern int	assoc_hash_count[];
extern int	peer_free_count;

/*
 * Miscellaneous statistic counters which may be queried.
 */
extern u_long	peer_timereset;		/* time stat counters were zeroed */
extern u_long	findpeer_calls;		/* number of calls to findpeer */
extern u_long	assocpeer_calls;	/* number of calls to findpeerbyassoc */
extern u_long	peer_allocations;	/* number of allocations from the free list */
extern u_long	peer_demobilizations;	/* number of structs freed to free list */
extern int	total_peer_structs;	/* number of peer structs in circulation */
extern int	peer_associations;	/* mobilized associations */
extern int	peer_preempt;		/* preemptable associations */
/* ntp_proto.c */
/*
 * System variables are declared here.	See Section 3.2 of the
 * specification.
 */
extern u_char	sys_leap;		/* system leap indicator */
extern u_char	sys_stratum;		/* stratum of system */
extern s_char	sys_precision;		/* local clock precision */
extern double	sys_rootdelay;		/* distance to current sync source */
extern double	sys_rootdispersion;	/* dispersion of system clock */
extern u_int32	sys_refid;		/* reference source for local clock */
extern l_fp	sys_reftime;		/* time we were last updated */
extern struct peer *sys_peer;		/* our current peer */
extern struct peer *sys_pps;		/* our current PPS peer */
extern struct peer *sys_prefer;		/* our cherished peer */
extern u_long	sys_automax;		/* maximum session key lifetime */

/*
 * Nonspecified system state variables.
 */
extern int	sys_bclient;		/* we set our time to broadcasts */
extern double	sys_bdelay; 		/* broadcast client default delay */
extern int	sys_authenticate;	/* requre authentication for config */
extern l_fp	sys_authdelay;		/* authentication delay */
extern keyid_t	sys_private;		/* private value for session seed */
extern int	sys_manycastserver;	/* respond to manycast client pkts */
extern int	sys_minclock;		/* minimum survivors */
extern int	sys_minsane;		/* minimum candidates */
extern int	sys_floor;		/* cluster stratum floor */
extern int	sys_ceiling;		/* cluster stratum ceiling */
extern u_char	sys_ttl[];		/* ttl mapping vector */
extern int	sys_ttlmax;		/* max ttl mapping vector index */
extern int	leap_next;		/* leap consensus */

/*
 * Statistics counters
 */
extern u_long	sys_stattime;		/* time when we started recording */
extern u_long	sys_restricted;	 	/* restricted packets */
extern u_long	sys_oldversionpkt;	/* old version packets */
extern u_long	sys_newversionpkt;	/* new version packets  */
extern u_long	sys_unknownversion;	/* don't know version packets */
extern u_long	sys_badlength;		/* bad length or format */
extern u_long	sys_processed;		/* packets processed */
extern u_long	sys_badauth;		/* bad authentication */
extern u_long	sys_limitrejected;	/* rate limit exceeded */
extern u_long	sys_received;		/* packets received */

/* ntp_refclock.c */
#ifdef REFCLOCK
#ifdef PPS
extern int	fdpps;			/* pps file descriptor */
#endif /* PPS */
#endif

/* ntp_request.c */
extern keyid_t	info_auth_keyid;	/* keyid used to authenticate requests */

/* ntp_restrict.c */
extern struct restrictlist *restrictlist; /* the ipv4 restriction list */
extern struct restrictlist6 *restrictlist6; /* the ipv6 restriction list */
extern u_long	res_min_interval;
extern u_long	res_avg_interval;
extern u_long	mon_age;		/* monitor preempt age */

/* ntp_timer.c */
extern volatile int alarm_flag;		/* alarm flag */
extern u_char	sys_revoke;		/* keys revoke timeout (log2 s) */
extern volatile u_long alarm_overflow;
extern u_long	current_time;		/* current time (s) */
extern u_long	timer_timereset;
extern u_long	timer_overflows;
extern u_long	timer_xmtcalls;

/* ntp_util.c */
extern int	stats_control;		/* write stats to fileset? */

/* ntpd.c */
extern volatile int debug;		/* debugging flag */
extern int	nofork;			/* no-fork flag */
extern int 	initializing;		/* initializing flag */
#ifdef HAVE_DROPROOT
extern int droproot;			/* flag: try to drop root privileges after startup */
extern char *user;			/* user to switch to */
extern char *group;			/* group to switch to */
extern char *chrootdir;			/* directory to chroot to */
#endif

/* refclock_conf.c */
#ifdef REFCLOCK
extern struct refclock *refclock_conf[]; /* refclock configuration table */
extern u_char	num_refclock_conf;
#endif