266 lines
7.6 KiB
C
266 lines
7.6 KiB
C
/*
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* ntp_refclock.h - definitions for reference clock support
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*/
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#ifndef NTP_REFCLOCK_H
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#define NTP_REFCLOCK_H
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#include "ntp_types.h"
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#if defined(HAVE_BSD_TTYS)
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#include <sgtty.h>
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#endif /* HAVE_BSD_TTYS */
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#if defined(HAVE_SYSV_TTYS)
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#include <termio.h>
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#endif /* HAVE_SYSV_TTYS */
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#if defined(HAVE_TERMIOS)
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# ifdef TERMIOS_NEEDS__SVID3
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# define _SVID3
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# endif
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# include <termios.h>
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# ifdef TERMIOS_NEEDS__SVID3
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# undef _SVID3
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# endif
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#endif
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#if defined(HAVE_SYS_MODEM_H)
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#include <sys/modem.h>
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#endif
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#if defined(STREAM)
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#include <stropts.h>
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#if defined(CLK)
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#include <sys/clkdefs.h>
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#endif /* CLK */
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#endif /* STREAM */
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#include "recvbuff.h"
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#if !defined(SYSV_TTYS) && !defined(STREAM) & !defined(BSD_TTYS)
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#define BSD_TTYS
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#endif /* SYSV_TTYS STREAM BSD_TTYS */
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#define SAMPLE(x) if ((pp->coderecv + 1) % MAXSTAGE != \
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pp->codeproc % MAXSTAGE) \
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pp->filter[pp->coderecv++ % MAXSTAGE] = \
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(x);
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/*
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* Macros to determine the clock type and unit numbers from a
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* 127.127.t.u address
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*/
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#define REFCLOCKTYPE(srcadr) ((SRCADR(srcadr) >> 8) & 0xff)
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#define REFCLOCKUNIT(srcadr) (SRCADR(srcadr) & 0xff)
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/*
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* List of reference clock names and descriptions. These must agree with
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* lib/clocktypes.c and ntpd/refclock_conf.c.
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*/
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struct clktype {
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int code; /* driver "major" number */
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const char *clocktype; /* long description */
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const char *abbrev; /* short description */
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};
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/*
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* Configuration flag values
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*/
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#define CLK_HAVETIME1 0x1
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#define CLK_HAVETIME2 0x2
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#define CLK_HAVEVAL1 0x4
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#define CLK_HAVEVAL2 0x8
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#define CLK_FLAG1 0x1
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#define CLK_FLAG2 0x2
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#define CLK_FLAG3 0x4
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#define CLK_FLAG4 0x8
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#define CLK_HAVEFLAG1 0x10
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#define CLK_HAVEFLAG2 0x20
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#define CLK_HAVEFLAG3 0x40
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#define CLK_HAVEFLAG4 0x80
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/*
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* Constant for disabling event reporting in
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* refclock_receive. ORed in leap
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* parameter
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*/
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#define REFCLOCK_OWN_STATES 0x80
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/*
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* Structure for returning clock status
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*/
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struct refclockstat {
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u_char type; /* clock type */
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u_char flags; /* clock flags */
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u_char haveflags; /* bit array of valid flags */
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u_short lencode; /* length of last timecode */
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const char *p_lastcode; /* last timecode received */
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u_int32 polls; /* transmit polls */
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u_int32 noresponse; /* no response to poll */
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u_int32 badformat; /* bad format timecode received */
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u_int32 baddata; /* invalid data timecode received */
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u_int32 timereset; /* driver resets */
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const char *clockdesc; /* ASCII description */
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double fudgetime1; /* configure fudge time1 */
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double fudgetime2; /* configure fudge time2 */
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int32 fudgeval1; /* configure fudge value1 */
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int32 fudgeval2; /* configure fudge value2 */
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u_char currentstatus; /* clock status */
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u_char lastevent; /* last exception event */
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u_char leap; /* leap bits */
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struct ctl_var *kv_list; /* additional variables */
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};
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/*
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* Reference clock I/O structure. Used to provide an interface between
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* the reference clock drivers and the I/O module.
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*/
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struct refclockio {
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struct refclockio *next; /* link to next structure */
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void (*clock_recv) P((struct recvbuf *)); /* completion routine */
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int (*io_input) P((struct recvbuf *)); /* input routine -
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to avoid excessive buffer use
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due to small bursts
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of refclock input data */
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caddr_t srcclock; /* pointer to clock structure */
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int datalen; /* lenth of data */
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int fd; /* file descriptor */
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u_long recvcount; /* count of receive completions */
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};
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/*
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* Structure for returning debugging info
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*/
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#define NCLKBUGVALUES 16
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#define NCLKBUGTIMES 32
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struct refclockbug {
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u_char nvalues; /* values following */
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u_char ntimes; /* times following */
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u_short svalues; /* values format sign array */
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u_int32 stimes; /* times format sign array */
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u_int32 values[NCLKBUGVALUES]; /* real values */
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l_fp times[NCLKBUGTIMES]; /* real times */
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};
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/*
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* Structure interface between the reference clock support
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* ntp_refclock.c and the driver utility routines
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*/
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#define MAXSTAGE 60 /* max median filter stages */
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#define NSTAGE 5 /* default median filter stages */
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#define BMAX 128 /* max timecode length */
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#define GMT 0 /* I hope nobody sees this */
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#define MAXDIAL 60 /* max length of modem dial strings */
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/*
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* Line discipline flags. These require line discipline or streams
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* modules to be installed/loaded in the kernel. If specified, but not
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* installed, the code runs as if unspecified.
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*/
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#define LDISC_STD 0x0 /* standard */
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#define LDISC_CLK 0x1 /* tty_clk \n intercept */
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#define LDISC_CLKPPS 0x2 /* tty_clk \377 intercept */
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#define LDISC_ACTS 0x4 /* tty_clk #* intercept */
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#define LDISC_CHU 0x8 /* depredated */
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#define LDISC_PPS 0x10 /* ppsclock, ppsapi */
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#define LDISC_RAW 0x20 /* raw binary */
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struct refclockproc {
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struct refclockio io; /* I/O handler structure */
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caddr_t unitptr; /* pointer to unit structure */
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u_char leap; /* leap/synchronization code */
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u_char currentstatus; /* clock status */
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u_char lastevent; /* last exception event */
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u_char type; /* clock type */
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const char *clockdesc; /* clock description */
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char a_lastcode[BMAX]; /* last timecode received */
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u_short lencode; /* length of last timecode */
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int year; /* year of eternity */
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int day; /* day of year */
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int hour; /* hour of day */
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int minute; /* minute of hour */
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int second; /* second of minute */
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int msec; /* millisecond of second */
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long usec; /* microsecond of second (alt) */
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u_long yearstart; /* beginning of year */
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int coderecv; /* put pointer */
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int codeproc; /* get pointer */
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l_fp lastref; /* timecode timestamp */
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l_fp lastrec; /* local timestamp */
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double offset; /* mean offset */
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double disp; /* sample dispersion */
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double variance; /* sample variance */
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double filter[MAXSTAGE]; /* median filter */
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/*
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* Configuration data
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*/
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double fudgetime1; /* fudge time1 */
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double fudgetime2; /* fudge time2 */
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u_int32 refid; /* reference identifier */
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u_char sloppyclockflag; /* fudge flags */
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/*
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* Status tallies
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*/
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u_long timestarted; /* time we started this */
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u_long polls; /* polls sent */
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u_long noreply; /* no replies to polls */
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u_long badformat; /* bad format reply */
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u_long baddata; /* bad data reply */
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};
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/*
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* Structure interface between the reference clock support
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* ntp_refclock.c and particular clock drivers. This must agree with the
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* structure defined in the driver.
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*/
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#define noentry 0 /* flag for null routine */
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#define NOFLAGS 0 /* flag for null flags */
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struct refclock {
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int (*clock_start) P((int, struct peer *));
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void (*clock_shutdown) P((int, struct peer *));
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void (*clock_poll) P((int, struct peer *));
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void (*clock_control) P((int, struct refclockstat *,
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struct refclockstat *, struct peer *));
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void (*clock_init) P((void));
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void (*clock_buginfo) P((int, struct refclockbug *, struct peer *));
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u_long clock_flags;
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};
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/*
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* Function prototypes
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*/
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/*
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* auxiliary PPS interface (implemented by refclock_atom())
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*/
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extern int pps_sample P((l_fp *));
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extern int io_addclock_simple P((struct refclockio *));
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extern int io_addclock P((struct refclockio *));
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extern void io_closeclock P((struct refclockio *));
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#ifdef REFCLOCK
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extern void refclock_buginfo P((struct sockaddr_in *,
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struct refclockbug *));
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extern void refclock_control P((struct sockaddr_in *,
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struct refclockstat *,
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struct refclockstat *));
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extern int refclock_open P((char *, int, int));
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extern void refclock_transmit P((struct peer *));
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extern int refclock_ioctl P((int, int));
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extern int refclock_process P((struct refclockproc *));
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extern void refclock_process_offset P((struct refclockproc *, l_fp, l_fp, double));
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extern void refclock_report P((struct peer *, int));
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extern int refclock_gtlin P((struct recvbuf *, char *, int,
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l_fp *));
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#endif /* REFCLOCK */
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#endif /* NTP_REFCLOCK_H */
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