xref: /netbsd-src/external/bsd/ntp/dist/libparse/clk_sel240x.c (revision eabc0478de71e4e011a5b4e0392741e01d491794)

/*	$NetBSD: clk_sel240x.c,v 1.7 2024/08/18 20:47:17 christos Exp $	*/

//////////////////////////////////////////////////////////////////////////////
// Copyright (c) 2009,2012 -
//        Schweitzer Engineering Laboratories, Inc. <opensource@selinc.com>
//////////////////////////////////////////////////////////////////////////////

// Need to have _XOPEN_SOURCE defined for time.h to give the
// correct strptime signature.  As per feature_test_macros(7),
// define this before including any header files.

// #ifndef _XOPEN_SOURCE
// #define _XOPEN_SOURCE
// #endif

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

#if defined(REFCLOCK) && defined(CLOCK_PARSE) && defined(CLOCK_SEL240X)

#include "ntp_syslog.h"
#include "ntp_types.h"
#include "ntp_fp.h"
#include "ntp_unixtime.h"
#include "ntp_calendar.h"
#include "ntp_machine.h"
#include "ntp_stdlib.h"

#include "parse.h"

#ifndef PARSESTREAM
# include <stdio.h>
#else
# include "sys/parsestreams.h"
#endif

#include <time.h>

//////////////////////////////////////////////////////////////////////////////
// The B8 output has the following format B8 = '\x01YYYY:ddd:hh:mm:ssq\r\n'
//    where q = ' ' locked
//              '.' <1 us
//              '*' <10 us
//              '#' <100 us
//              '?' >100 us
//
// Based on this we need to recored the stime when we receive the <SOH>
// character and end it when we see the \n.
//
// The q or quality character indicates satellite lock and sync.   For the
// purposes of NTP we are going to call it valid when we receive anything but
// a '?'.  But we are only going to call it synced when we receive a ' '
//////////////////////////////////////////////////////////////////////////////

static parse_inp_fnc_t inp_sel240x;
static parse_cvt_fnc_t cvt_sel240x;

// Parse clock format structure describing the message above
static struct format sel240x_fmt =
{ { {  6, 3 },
    {  0, 0 },
    {  1, 4 },
    { 10, 2 },
    { 13, 2 },
    { 16, 2 },
    {  0, 0 },
    {  0, 0 },
    {  0, 0 },
    {  0, 0 },
    {  0, 0 },
    {  0, 0 }
  },
  (const unsigned char *)"\x01    :   :  :  :   \x0d\x0a",
  0
};

// Structure desctibing the parser
clockformat_t clock_sel240x =
{
	inp_sel240x,
	cvt_sel240x,
	pps_one,
	(void*)&sel240x_fmt,
	"SEL B8",
	25,
	0
};

//////////////////////////////////////////////////////////////////////////////
static unsigned long
inp_sel240x( parse_t      *parseio,
	     char         ch,
	     timestamp_t  *tstamp
	   )
{
	unsigned long rc;

	parseprintf( DD_PARSE,
	             ("inp_sel240x(0x%lx, 0x%x, ...)\n",(long)parseio, ch));

	switch( ch )
	{
	case '\x01':
		parseio->parse_index = 1;
		parseio->parse_data[0] = ch;
		parseio->parse_dtime.parse_stime = *tstamp;
		rc = PARSE_INP_SKIP;
		break;
	case '\n':
		if( (rc = parse_addchar(parseio, ch)) == PARSE_INP_SKIP )
		{
			rc = parse_end( parseio );
		}
		break;
	default:
		rc = parse_addchar( parseio, ch );
	}

	return rc;
}

//////////////////////////////////////////////////////////////////////////////
static unsigned long
cvt_sel240x( unsigned char *buffer,
	     int            size,
	     struct format *format,
	     clocktime_t   *clock_time,
	     void          *local
	   )
{
	unsigned long rc = CVT_NONE;

	if( Strok(buffer, format->fixed_string) )
	{
		struct tm ptime;
		buffer++;
		buffer = (unsigned char *) strptime(
			(const char *)buffer, "%Y:%j:%H:%M:%S", &ptime );
		if( *(buffer+1) != '\x0d' )
		{
			rc = CVT_FAIL | CVT_BADFMT;
		}
		else
		{
			clock_time->day = ptime.tm_mday;
			clock_time->month = ptime.tm_mon + 1;
			clock_time->year = ptime.tm_year + 1900;
			clock_time->hour = ptime.tm_hour;
			clock_time->minute = ptime.tm_min;
			clock_time->second = ptime.tm_sec;
			clock_time->usecond = 0;
			clock_time->utcoffset = 0;
			clock_time->flags = PARSEB_UTC;

			if( *buffer == '?' )
			{
				clock_time->flags |= PARSEB_POWERUP;
			}
			else if( *buffer != ' ' )
			{
				clock_time->flags |= PARSEB_NOSYNC;
			}

			rc = CVT_OK;
		}
	}

	return rc;
}

#else  /* not (REFCLOCK && CLOCK_PARSE && CLOCK_SEL240X) */
NONEMPTY_TRANSLATION_UNIT
#endif /* not (REFCLOCK && CLOCK_PARSE && CLOCK_SEL240X) */