Annotation of embedaddon/ntp/libparse/clk_varitext.c, revision 1.1
1.1 ! misho 1: #ifdef HAVE_CONFIG_H
! 2: # include <config.h>
! 3: #endif
! 4:
! 5: #if defined(REFCLOCK) && defined(CLOCK_PARSE) && defined(CLOCK_VARITEXT)
! 6: /*
! 7: * /src/NTP/ntp4-dev/libparse/clk_varitext.c,v 1.5 2005/04/16 17:32:10 kardel RELEASE_20050508_A
! 8: *
! 9: * clk_varitext.c,v 1.5 2005/04/16 17:32:10 kardel RELEASE_20050508_A
! 10: *
! 11: * Varitext code variant by A.McConnell 1997/01/19
! 12: *
! 13: * Supports Varitext's Radio Clock
! 14: *
! 15: * Used the Meinberg/Computime clock as a template for Varitext Radio Clock
! 16: *
! 17: * Codebase:
! 18: * Copyright (c) 1995-2005 by Frank Kardel <kardel <AT> ntp.org>
! 19: * Copyright (c) 1989-1994 by Frank Kardel, Friedrich-Alexander Universität Erlangen-Nürnberg, Germany
! 20: *
! 21: * Redistribution and use in source and binary forms, with or without
! 22: * modification, are permitted provided that the following conditions
! 23: * are met:
! 24: * 1. Redistributions of source code must retain the above copyright
! 25: * notice, this list of conditions and the following disclaimer.
! 26: * 2. Redistributions in binary form must reproduce the above copyright
! 27: * notice, this list of conditions and the following disclaimer in the
! 28: * documentation and/or other materials provided with the distribution.
! 29: * 3. Neither the name of the author nor the names of its contributors
! 30: * may be used to endorse or promote products derived from this software
! 31: * without specific prior written permission.
! 32: *
! 33: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
! 34: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 35: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 36: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
! 37: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 38: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 39: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 40: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 41: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 42: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 43: * SUCH DAMAGE.
! 44: *
! 45: */
! 46:
! 47: #include "ntp_fp.h"
! 48: #include "ntp_unixtime.h"
! 49: #include "ntp_calendar.h"
! 50:
! 51: #include "parse.h"
! 52:
! 53: #ifndef PARSESTREAM
! 54: # include "ntp_stdlib.h"
! 55: # include <stdio.h>
! 56: #else
! 57: # include "sys/parsestreams.h"
! 58: extern int printf (const char *, ...);
! 59: #endif
! 60:
! 61: static const u_char VT_INITIALISED = 0x01;
! 62: static const u_char VT_SYNCHRONISED = 0x02;
! 63: static const u_char VT_ALARM_STATE = 0x04;
! 64: static const u_char VT_BST = 0x08;
! 65: static const u_char VT_SEASON_CHANGE = 0x10;
! 66: static const u_char VT_LAST_TELEGRAM_OK = 0x20;
! 67:
! 68: /*
! 69: * The Varitext receiver sends a datagram in the following format every minute
! 70: *
! 71: * Timestamp T:YY:MM:MD:WD:HH:MM:SSCRLFSTXXX
! 72: * Pos 0123456789012345678901 2 3 4567
! 73: * 0000000000111111111122 2 2 2222
! 74: * Parse T: : : : : : : \r\n
! 75: *
! 76: * T Startcharacter "T" specifies start of the timestamp
! 77: * YY Year MM Month 1-12
! 78: * MD Day of the month
! 79: * WD Day of week
! 80: * HH Hour
! 81: * MM Minute
! 82: * SS Second
! 83: * CR Carriage return
! 84: * LF Linefeed
! 85: * ST Status character
! 86: * Bit 0 - Set= Initialised; Reset=Time Invalid (DO NOT USE)
! 87: * Bit 1 - Set= Synchronised; Reset= Unsynchronised
! 88: * Bit 2 - Set= Alarm state; Reset= No alarm
! 89: * Bit 3 - Set= BST; Reset= GMT
! 90: * Bit 4 - Set= Seasonal change in approx hour; Reset= No seasonal change expected
! 91: * Bit 5 - Set= Last MSF telegram was OK; Reset= Last telegram was in error;
! 92: * Bit 6 - Always set
! 93: * Bit 7 - Unused
! 94: * XXX Checksum calculated using Fletcher's method (ignored for now).
! 95: */
! 96:
! 97: static struct format varitext_fmt =
! 98: {
! 99: {
! 100: {8, 2}, {5, 2}, {2, 2}, /* day, month, year */
! 101: {14, 2}, {17, 2}, {20, 2}, /* hour, minute, second */
! 102: {11, 2}, {24, 1} /* dayofweek, status */
! 103: },
! 104: (const unsigned char*)"T: : : : : : : \r\n ",
! 105: 0
! 106: };
! 107:
! 108: static u_long cvt_varitext (unsigned char *, int, struct format *, clocktime_t *, void *);
! 109: static u_long inp_varitext (parse_t *, unsigned int, timestamp_t *);
! 110:
! 111: struct varitext {
! 112: unsigned char start_found;
! 113: unsigned char end_found;
! 114: unsigned char end_count;
! 115: unsigned char previous_ch;
! 116: timestamp_t tstamp;
! 117: };
! 118:
! 119: clockformat_t clock_varitext =
! 120: {
! 121: inp_varitext, /* Because of the strange format we need to parse it ourselves */
! 122: cvt_varitext, /* Varitext conversion */
! 123: 0, /* no PPS monitoring */
! 124: (void *)&varitext_fmt, /* conversion configuration */
! 125: "Varitext Radio Clock", /* Varitext Radio Clock */
! 126: 30, /* string buffer */
! 127: sizeof(struct varitext), /* Private data size required to hold current parse state */
! 128: };
! 129:
! 130: /*
! 131: * cvt_varitext
! 132: *
! 133: * convert simple type format
! 134: */
! 135: static u_long
! 136: cvt_varitext(
! 137: unsigned char *buffer,
! 138: int size,
! 139: struct format *format,
! 140: clocktime_t *clock_time,
! 141: void *local
! 142: )
! 143: {
! 144:
! 145: if (!Strok(buffer, format->fixed_string)) {
! 146: return CVT_NONE;
! 147: } else {
! 148: if (Stoi(&buffer[format->field_offsets[O_DAY].offset], &clock_time->day,
! 149: format->field_offsets[O_DAY].length) ||
! 150: Stoi(&buffer[format->field_offsets[O_MONTH].offset], &clock_time->month,
! 151: format->field_offsets[O_MONTH].length) ||
! 152: Stoi(&buffer[format->field_offsets[O_YEAR].offset], &clock_time->year,
! 153: format->field_offsets[O_YEAR].length) ||
! 154: Stoi(&buffer[format->field_offsets[O_HOUR].offset], &clock_time->hour,
! 155: format->field_offsets[O_HOUR].length) ||
! 156: Stoi(&buffer[format->field_offsets[O_MIN].offset], &clock_time->minute,
! 157: format->field_offsets[O_MIN].length) ||
! 158: Stoi(&buffer[format->field_offsets[O_SEC].offset], &clock_time->second,
! 159: format->field_offsets[O_SEC].length)) {
! 160: return CVT_FAIL | CVT_BADFMT;
! 161: } else {
! 162: u_char *f = (u_char*) &buffer[format->field_offsets[O_FLAGS].offset];
! 163:
! 164: clock_time->flags = 0;
! 165: clock_time->utcoffset = 0;
! 166:
! 167: if (((*f) & VT_BST)) /* BST flag is set so set to indicate daylight saving time is active and utc offset */
! 168: {
! 169: clock_time->utcoffset = -1*60*60;
! 170: clock_time->flags |= PARSEB_DST;
! 171: }
! 172: /*
! 173: if (!((*f) & VT_INITIALISED)) Clock not initialised
! 174: clock_time->flags |= PARSEB_POWERUP;
! 175:
! 176: if (!((*f) & VT_SYNCHRONISED)) Clock not synchronised
! 177: clock_time->flags |= PARSEB_NOSYNC;
! 178:
! 179: if (((*f) & VT_SEASON_CHANGE)) Seasonal change expected in the next hour
! 180: clock_time->flags |= PARSEB_ANNOUNCE;
! 181: */
! 182: return CVT_OK;
! 183: }
! 184: }
! 185: }
! 186:
! 187: static u_long
! 188: inp_varitext(
! 189: parse_t *parseio,
! 190: unsigned int ch,
! 191: timestamp_t *tstamp
! 192: )
! 193: {
! 194: struct varitext *t = (struct varitext *)parseio->parse_pdata;
! 195: int rtc;
! 196:
! 197: parseprintf(DD_PARSE, ("inp_varitext(0x%lx, 0x%x, ...)\n", (long)parseio, ch));
! 198:
! 199: if (!t)
! 200: return PARSE_INP_SKIP; /* local data not allocated - sigh! */
! 201:
! 202: if (ch == 'T')
! 203: t->tstamp = *tstamp;
! 204:
! 205: if ((t->previous_ch == 'T') && (ch == ':'))
! 206: {
! 207: parseprintf(DD_PARSE, ("inp_varitext: START seen\n"));
! 208:
! 209: parseio->parse_data[0] = 'T';
! 210: parseio->parse_index=1;
! 211: parseio->parse_dtime.parse_stime = t->tstamp; /* Time stamp at packet start */
! 212: t->start_found = 1;
! 213: t->end_found = 0;
! 214: t->end_count = 0;
! 215: }
! 216:
! 217: if (t->start_found)
! 218: {
! 219: if ((rtc = parse_addchar(parseio, ch)) != PARSE_INP_SKIP)
! 220: {
! 221: parseprintf(DD_PARSE, ("inp_varitext: ABORTED due to too many characters\n"));
! 222:
! 223: memset(t, 0, sizeof(struct varitext));
! 224: return rtc;
! 225: }
! 226:
! 227: if (t->end_found)
! 228: {
! 229: if (++(t->end_count) == 4) /* Finally found the end of the message */
! 230: {
! 231: parseprintf(DD_PARSE, ("inp_varitext: END seen\n"));
! 232:
! 233: memset(t, 0, sizeof(struct varitext));
! 234: if ((rtc = parse_addchar(parseio, 0)) == PARSE_INP_SKIP)
! 235: return parse_end(parseio);
! 236: else
! 237: return rtc;
! 238: }
! 239: }
! 240:
! 241: if ((t->previous_ch == '\r') && (ch == '\n'))
! 242: {
! 243: t->end_found = 1;
! 244: }
! 245:
! 246: }
! 247:
! 248: t->previous_ch = ch;
! 249:
! 250: return PARSE_INP_SKIP;
! 251: }
! 252:
! 253: #else /* not (REFCLOCK && CLOCK_PARSE && CLOCK_VARITEXT) */
! 254: int clk_varitext_bs;
! 255: #endif /* not (REFCLOCK && CLOCK_PARSE && CLOCK_VARITEXT) */
! 256:
! 257: /*
! 258: * History:
! 259: *
! 260: * clk_varitext.c,v
! 261: * Revision 1.5 2005/04/16 17:32:10 kardel
! 262: * update copyright
! 263: *
! 264: * Revision 1.4 2004/11/14 15:29:41 kardel
! 265: * support PPSAPI, upgrade Copyright to Berkeley style
! 266: *
! 267: *
! 268: * Revision 1.0 1997/06/02 13:16:30 McConnell
! 269: * File created
! 270: *
! 271: */
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