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/*
* ntp_refclock.h - definitions for reference clock support
*/
#ifndef NTP_REFCLOCK_H
#define NTP_REFCLOCK_H
#if defined(HAVE_SYS_MODEM_H)
#include <sys/modem.h>
#endif
#include "ntp_types.h"
#include "ntp_tty.h"
#include "recvbuff.h"
#define SAMPLE(x) pp->coderecv = (pp->coderecv + 1) % MAXSTAGE; \
pp->filter[pp->coderecv] = (x); \
if (pp->coderecv == pp->codeproc) \
pp->codeproc = (pp->codeproc + 1) % MAXSTAGE;
/*
* Macros to determine the clock type and unit numbers from a
* 127.127.t.u address
*/
#define REFCLOCKTYPE(srcadr) ((SRCADR(srcadr) >> 8) & 0xff)
#define REFCLOCKUNIT(srcadr) (SRCADR(srcadr) & 0xff)
/*
* List of reference clock names and descriptions. These must agree with
* lib/clocktypes.c and ntpd/refclock_conf.c.
*/
struct clktype {
int code; /* driver "major" number */
const char *clocktype; /* long description */
const char *abbrev; /* short description */
};
extern struct clktype clktypes[];
/*
* Configuration flag values
*/
#define CLK_HAVETIME1 0x1
#define CLK_HAVETIME2 0x2
#define CLK_HAVEVAL1 0x4
#define CLK_HAVEVAL2 0x8
#define CLK_FLAG1 0x1
#define CLK_FLAG2 0x2
#define CLK_FLAG3 0x4
#define CLK_FLAG4 0x8
#define CLK_HAVEFLAG1 0x10
#define CLK_HAVEFLAG2 0x20
#define CLK_HAVEFLAG3 0x40
#define CLK_HAVEFLAG4 0x80
/*
* Constant for disabling event reporting in
* refclock_receive. ORed in leap
* parameter
*/
#define REFCLOCK_OWN_STATES 0x80
/*
* Structure for returning clock status
*/
struct refclockstat {
u_char type; /* clock type */
u_char flags; /* clock flags */
u_char haveflags; /* bit array of valid flags */
u_short lencode; /* length of last timecode */
const char *p_lastcode; /* last timecode received */
u_int32 polls; /* transmit polls */
u_int32 noresponse; /* no response to poll */
u_int32 badformat; /* bad format timecode received */
u_int32 baddata; /* invalid data timecode received */
u_int32 timereset; /* driver resets */
const char *clockdesc; /* ASCII description */
double fudgetime1; /* configure fudge time1 */
double fudgetime2; /* configure fudge time2 */
int32 fudgeval1; /* configure fudge value1 */
u_int32 fudgeval2; /* configure fudge value2 */
u_char currentstatus; /* clock status */
u_char lastevent; /* last exception event */
u_char leap; /* leap bits */
struct ctl_var *kv_list; /* additional variables */
};
/*
* Reference clock I/O structure. Used to provide an interface between
* the reference clock drivers and the I/O module.
*/
struct refclockio {
struct refclockio *next; /* link to next structure */
void (*clock_recv) (struct recvbuf *); /* completion routine */
int (*io_input) (struct recvbuf *); /* input routine -
to avoid excessive buffer use
due to small bursts
of refclock input data */
struct peer *srcclock; /* refclock peer */
int datalen; /* length of data */
int fd; /* file descriptor */
u_long recvcount; /* count of receive completions */
int active; /* nonzero when in use */
#ifdef HAVE_IO_COMPLETION_PORT
void * device_context; /* device-related data for i/o subsystem */
#endif
};
/*
* Structure for returning debugging info
*/
#define NCLKBUGVALUES 16
#define NCLKBUGTIMES 32
struct refclockbug {
u_char nvalues; /* values following */
u_char ntimes; /* times following */
u_short svalues; /* values format sign array */
u_int32 stimes; /* times format sign array */
u_int32 values[NCLKBUGVALUES]; /* real values */
l_fp times[NCLKBUGTIMES]; /* real times */
};
#ifdef HAVE_IO_COMPLETION_PORT
extern HANDLE WaitableIoEventHandle;
#endif
/*
* Structure interface between the reference clock support
* ntp_refclock.c and the driver utility routines
*/
#define MAXSTAGE 60 /* max median filter stages */
#define NSTAGE 5 /* default median filter stages */
#define BMAX 128 /* max timecode length */
#define GMT 0 /* I hope nobody sees this */
#define MAXDIAL 60 /* max length of modem dial strings */
struct refclockproc {
void * unitptr; /* pointer to unit structure */
struct refclock * conf; /* refclock_conf[type] */
struct refclockio io; /* I/O handler structure */
u_char leap; /* leap/synchronization code */
u_char currentstatus; /* clock status */
u_char lastevent; /* last exception event */
u_char type; /* clock type */
const char *clockdesc; /* clock description */
u_long nextaction; /* local activity timeout */
void (*action)(struct peer *); /* timeout callback */
char a_lastcode[BMAX]; /* last timecode received */
int lencode; /* length of last timecode */
int year; /* year of eternity */
int day; /* day of year */
int hour; /* hour of day */
int minute; /* minute of hour */
int second; /* second of minute */
long nsec; /* nanosecond of second */
u_long yearstart; /* beginning of year */
int coderecv; /* put pointer */
int codeproc; /* get pointer */
l_fp lastref; /* reference timestamp */
l_fp lastrec; /* receive timestamp */
double offset; /* mean offset */
double disp; /* sample dispersion */
double jitter; /* jitter (mean squares) */
double filter[MAXSTAGE]; /* median filter */
/*
* Configuration data
*/
double fudgetime1; /* fudge time1 */
double fudgetime2; /* fudge time2 */
u_char stratum; /* server stratum */
u_int32 refid; /* reference identifier */
u_char sloppyclockflag; /* fudge flags */
/*
* Status tallies
*/
u_long timestarted; /* time we started this */
u_long polls; /* polls sent */
u_long noreply; /* no replies to polls */
u_long badformat; /* bad format reply */
u_long baddata; /* bad data reply */
};
/*
* Structure interface between the reference clock support
* ntp_refclock.c and particular clock drivers. This must agree with the
* structure defined in the driver.
*/
#define noentry 0 /* flag for null routine */
#define NOFLAGS 0 /* flag for null flags */
struct refclock {
int (*clock_start) (int, struct peer *);
void (*clock_shutdown) (int, struct peer *);
void (*clock_poll) (int, struct peer *);
void (*clock_control) (int, const struct refclockstat *,
struct refclockstat *, struct peer *);
void (*clock_init) (void);
void (*clock_buginfo) (int, struct refclockbug *, struct peer *);
void (*clock_timer) (int, struct peer *);
};
/*
* Function prototypes
*/
extern int io_addclock (struct refclockio *);
extern void io_closeclock (struct refclockio *);
#ifdef REFCLOCK
extern void refclock_buginfo(sockaddr_u *,
struct refclockbug *);
extern void refclock_control(sockaddr_u *,
const struct refclockstat *,
struct refclockstat *);
extern int refclock_open (char *, u_int, u_int);
extern int refclock_setup (int, u_int, u_int);
extern void refclock_timer (struct peer *);
extern void refclock_transmit(struct peer *);
extern int refclock_process(struct refclockproc *);
extern int refclock_process_f(struct refclockproc *, double);
extern void refclock_process_offset(struct refclockproc *, l_fp,
l_fp, double);
extern void refclock_report (struct peer *, int);
extern int refclock_gtlin (struct recvbuf *, char *, int, l_fp *);
extern int refclock_gtraw (struct recvbuf *, char *, int, l_fp *);
extern int indicate_refclock_packet(struct refclockio *,
struct recvbuf *);
extern void process_refclock_packet(struct recvbuf *);
#endif /* REFCLOCK */
#endif /* NTP_REFCLOCK_H */
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