240 lines
6.5 KiB
C
240 lines
6.5 KiB
C
#ifdef HAVE_CONFIG_H
|
|
# include <config.h>
|
|
#endif
|
|
|
|
#if defined(REFCLOCK) && defined(CLOCK_PARSE) && defined(CLOCK_VARITEXT)
|
|
/*
|
|
* clk_varitext.c,v 1.0 1997/01/19 A.McConnell
|
|
*
|
|
* Supports Varitext's Radio Clock
|
|
*
|
|
* Used the Meinberg/Computime clock as a template for Varitext Radio Clock
|
|
*
|
|
* Copyright (C) 1992-1996 by Frank Kardel
|
|
* Friedrich-Alexander Universitt Erlangen-Nrnberg, Germany
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE.
|
|
*
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/time.h>
|
|
|
|
#include "ntp_fp.h"
|
|
#include "ntp_unixtime.h"
|
|
#include "ntp_calendar.h"
|
|
|
|
#include "parse.h"
|
|
|
|
#ifndef PARSESTREAM
|
|
#include "ntp_stdlib.h"
|
|
#include <stdio.h>
|
|
#else
|
|
#include "sys/parsestreams.h"
|
|
extern void printf P((const char *, ...));
|
|
#endif
|
|
|
|
static const u_char VT_INITIALISED = 0x01;
|
|
static const u_char VT_SYNCHRONISED = 0x02;
|
|
static const u_char VT_ALARM_STATE = 0x04;
|
|
static const u_char VT_BST = 0x08;
|
|
static const u_char VT_SEASON_CHANGE = 0x10;
|
|
static const u_char VT_LAST_TELEGRAM_OK = 0x20;
|
|
|
|
/*
|
|
* The Varitext receiver sends a datagram in the following format every minute
|
|
*
|
|
* Timestamp T:YY:MM:MD:WD:HH:MM:SSCRLFSTXXX
|
|
* Pos 0123456789012345678901 2 3 4567
|
|
* 0000000000111111111122 2 2 2222
|
|
* Parse T: : : : : : : \r\n
|
|
*
|
|
* T Startcharacter "T" specifies start of the timestamp
|
|
* YY Year MM Month 1-12
|
|
* MD Day of the month
|
|
* WD Day of week
|
|
* HH Hour
|
|
* MM Minute
|
|
* SS Second
|
|
* CR Carriage return
|
|
* LF Linefeed
|
|
* ST Status character
|
|
* Bit 0 - Set= Initialised; Reset=Time Invalid (DO NOT USE)
|
|
* Bit 1 - Set= Synchronised; Reset= Unsynchronised
|
|
* Bit 2 - Set= Alarm state; Reset= No alarm
|
|
* Bit 3 - Set= BST; Reset= GMT
|
|
* Bit 4 - Set= Seasonal change in approx hour; Reset= No seasonal change expected
|
|
* Bit 5 - Set= Last MSF telegram was OK; Reset= Last telegram was in error;
|
|
* Bit 6 - Always set
|
|
* Bit 7 - Unused
|
|
* XXX Checksum calculated using Fletcher's method (ignored for now).
|
|
*/
|
|
|
|
static struct format varitext_fmt =
|
|
{
|
|
{
|
|
{8, 2}, {5, 2}, {2, 2}, /* day, month, year */
|
|
{14, 2}, {17, 2}, {20, 2}, /* hour, minute, second */
|
|
{11, 2}, {24, 1} /* dayofweek, status */
|
|
},
|
|
(const unsigned char*)"T: : : : : : : \r\n ",
|
|
0
|
|
};
|
|
|
|
static u_long cvt_varitext P((unsigned char *, int, struct format *, clocktime_t *, void *));
|
|
static u_long inp_varitext P((parse_t *, unsigned int, timestamp_t *));
|
|
|
|
struct varitext {
|
|
unsigned char start_found;
|
|
unsigned char end_found;
|
|
unsigned char end_count;
|
|
unsigned char previous_ch;
|
|
timestamp_t tstamp;
|
|
};
|
|
|
|
clockformat_t clock_varitext =
|
|
{
|
|
inp_varitext, /* Because of the strange format we need to parse it ourselves */
|
|
cvt_varitext, /* Varitext conversion */
|
|
0, /* no PPS monitoring */
|
|
(void *)&varitext_fmt, /* conversion configuration */
|
|
"Varitext Radio Clock", /* Varitext Radio Clock */
|
|
30, /* string buffer */
|
|
sizeof(struct varitext), /* Private data size required to hold current parse state */
|
|
};
|
|
|
|
/*
|
|
* cvt_varitext
|
|
*
|
|
* convert simple type format
|
|
*/
|
|
static u_long
|
|
cvt_varitext(
|
|
unsigned char *buffer,
|
|
int size,
|
|
struct format *format,
|
|
clocktime_t *clock_time,
|
|
void *local
|
|
)
|
|
{
|
|
|
|
if (!Strok(buffer, format->fixed_string)) {
|
|
return CVT_NONE;
|
|
} else {
|
|
if (Stoi(&buffer[format->field_offsets[O_DAY].offset], &clock_time->day,
|
|
format->field_offsets[O_DAY].length) ||
|
|
Stoi(&buffer[format->field_offsets[O_MONTH].offset], &clock_time->month,
|
|
format->field_offsets[O_MONTH].length) ||
|
|
Stoi(&buffer[format->field_offsets[O_YEAR].offset], &clock_time->year,
|
|
format->field_offsets[O_YEAR].length) ||
|
|
Stoi(&buffer[format->field_offsets[O_HOUR].offset], &clock_time->hour,
|
|
format->field_offsets[O_HOUR].length) ||
|
|
Stoi(&buffer[format->field_offsets[O_MIN].offset], &clock_time->minute,
|
|
format->field_offsets[O_MIN].length) ||
|
|
Stoi(&buffer[format->field_offsets[O_SEC].offset], &clock_time->second,
|
|
format->field_offsets[O_SEC].length)) {
|
|
return CVT_FAIL | CVT_BADFMT;
|
|
} else {
|
|
u_char *f = (u_char*) &buffer[format->field_offsets[O_FLAGS].offset];
|
|
|
|
clock_time->flags = 0;
|
|
clock_time->utcoffset = 0;
|
|
|
|
if (((*f) & VT_BST)) /* BST flag is set so set to indicate daylight saving time is active and utc offset */
|
|
{
|
|
clock_time->utcoffset = -1*60*60;
|
|
clock_time->flags |= PARSEB_DST;
|
|
}
|
|
/*
|
|
if (!((*f) & VT_INITIALISED)) Clock not initialised
|
|
clock_time->flags |= PARSEB_POWERUP;
|
|
|
|
if (!((*f) & VT_SYNCHRONISED)) Clock not synchronised
|
|
clock_time->flags |= PARSEB_NOSYNC;
|
|
|
|
if (((*f) & VT_SEASON_CHANGE)) Seasonal change expected in the next hour
|
|
clock_time->flags |= PARSEB_ANNOUNCE;
|
|
*/
|
|
return CVT_OK;
|
|
}
|
|
}
|
|
}
|
|
|
|
static u_long
|
|
inp_varitext(
|
|
parse_t *parseio,
|
|
unsigned int ch,
|
|
timestamp_t *tstamp
|
|
)
|
|
{
|
|
struct varitext *t = (struct varitext *)parseio->parse_pdata;
|
|
int rtc;
|
|
|
|
parseprintf(DD_PARSE, ("inp_varitext(0x%x, 0x%x, ...)\n", (int)parseio, (int)ch));
|
|
|
|
if (!t)
|
|
return PARSE_INP_SKIP; /* local data not allocated - sigh! */
|
|
|
|
if (ch == 'T')
|
|
t->tstamp = *tstamp;
|
|
|
|
if ((t->previous_ch == 'T') && (ch == ':'))
|
|
{
|
|
parseprintf(DD_PARSE, ("inp_varitext: START seen\n"));
|
|
|
|
parseio->parse_data[0] = 'T';
|
|
parseio->parse_index=1;
|
|
parseio->parse_dtime.parse_stime = t->tstamp; /* Time stamp at packet start */
|
|
t->start_found = 1;
|
|
t->end_found = 0;
|
|
t->end_count = 0;
|
|
}
|
|
|
|
if (t->start_found)
|
|
{
|
|
if ((rtc = parse_addchar(parseio, ch)) != PARSE_INP_SKIP)
|
|
{
|
|
parseprintf(DD_PARSE, ("inp_varitext: ABORTED due to too many characters\n"));
|
|
|
|
memset(t, 0, sizeof(struct varitext));
|
|
return rtc;
|
|
}
|
|
|
|
if (t->end_found)
|
|
{
|
|
if (++(t->end_count) == 4) /* Finally found the end of the message */
|
|
{
|
|
parseprintf(DD_PARSE, ("inp_varitext: END seen\n"));
|
|
|
|
memset(t, 0, sizeof(struct varitext));
|
|
if ((rtc = parse_addchar(parseio, 0)) == PARSE_INP_SKIP)
|
|
return parse_end(parseio);
|
|
else
|
|
return rtc;
|
|
}
|
|
}
|
|
|
|
if ((t->previous_ch == '\r') && (ch == '\n'))
|
|
{
|
|
t->end_found = 1;
|
|
}
|
|
|
|
}
|
|
|
|
t->previous_ch = ch;
|
|
|
|
return PARSE_INP_SKIP;
|
|
}
|
|
|
|
#else /* not (REFCLOCK && CLOCK_PARSE && CLOCK_VARITEXT) */
|
|
int clk_varitext_bs;
|
|
#endif /* not (REFCLOCK && CLOCK_PARSE && CLOCK_VARITEXT) */
|
|
|
|
/*
|
|
* Revision 1.0 1997/06/02 13:16:30 McConnell
|
|
* File created
|
|
*
|
|
*/
|