3311ff84ea
ntp 4.2.8p5 Reviewed by: cy, roberto Relnotes: yes Differential Revision: https://reviews.freebsd.org/D4828
782 lines
23 KiB
C
782 lines
23 KiB
C
/*
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* /src/NTP/REPOSITORY/ntp4-dev/libparse/clk_meinberg.c,v 4.12.2.1 2005/09/25 10:22:35 kardel RELEASE_20050925_A
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*
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* clk_meinberg.c,v 4.12.2.1 2005/09/25 10:22:35 kardel RELEASE_20050925_A
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*
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* Meinberg clock support
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*
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* Copyright (c) 1995-2015 by Frank Kardel <kardel <AT> ntp.org>
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* Copyright (c) 1989-1994 by Frank Kardel, Friedrich-Alexander Universitaet Erlangen-Nuernberg, Germany
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the author nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#if defined(REFCLOCK) && defined(CLOCK_PARSE) && defined(CLOCK_MEINBERG)
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#include "ntp_fp.h"
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#include "ntp_unixtime.h"
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#include "ntp_calendar.h"
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#include "ntp_machine.h"
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#include "parse.h"
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#ifndef PARSESTREAM
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#include <stdio.h>
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#else
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#include "sys/parsestreams.h"
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#endif
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#include "ntp_stdlib.h"
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#include "ntp_stdlib.h"
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#include "mbg_gps166.h"
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#include "binio.h"
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#include "ascii.h"
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/*
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* The Meinberg receiver every second sends a datagram of the following form
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* (Standard Format)
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*
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* <STX>D:<dd>.<mm>.<yy>;T:<w>;U:<hh>:<mm>:<ss>;<S><F><D><A><ETX>
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* pos: 0 00 00 0 00 0 11 111 1 111 12 2 22 2 22 2 2 2 3 3 3
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* 1 23 45 6 78 9 01 234 5 678 90 1 23 4 56 7 8 9 0 1 2
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* <STX> = '\002' ASCII start of text
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* <ETX> = '\003' ASCII end of text
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* <dd>,<mm>,<yy> = day, month, year(2 digits!!)
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* <w> = day of week (sunday= 0)
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* <hh>,<mm>,<ss> = hour, minute, second
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* <S> = '#' if never synced since powerup for DCF C51
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* = '#' if not PZF sychronisation available for PZF 535/509
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* = ' ' if ok
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* <F> = '*' if time comes from internal quartz
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* = ' ' if completely synched
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* <D> = 'S' if daylight saving time is active
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* = 'U' if time is represented in UTC
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* = ' ' if no special condition exists
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* <A> = '!' during the hour preceeding an daylight saving time
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* start/end change
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* = 'A' leap second insert warning
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* = ' ' if no special condition exists
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*
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* Extended data format (PZFUERL for PZF type clocks)
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*
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* <STX><dd>.<mm>.<yy>; <w>; <hh>:<mm>:<ss>; <U><S><F><D><A><L><R><ETX>
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* pos: 0 00 0 00 0 00 11 1 11 11 1 11 2 22 22 2 2 2 2 2 3 3 3
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* 1 23 4 56 7 89 01 2 34 56 7 89 0 12 34 5 6 7 8 9 0 1 2
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* <STX> = '\002' ASCII start of text
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* <ETX> = '\003' ASCII end of text
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* <dd>,<mm>,<yy> = day, month, year(2 digits!!)
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* <w> = day of week (sunday= 0)
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* <hh>,<mm>,<ss> = hour, minute, second
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* <U> = 'U' UTC time display
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* <S> = '#' if never synced since powerup else ' ' for DCF C51
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* '#' if not PZF sychronisation available else ' ' for PZF 535/509
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* <F> = '*' if time comes from internal quartz else ' '
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* <D> = 'S' if daylight saving time is active else ' '
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* <A> = '!' during the hour preceeding an daylight saving time
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* start/end change
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* <L> = 'A' LEAP second announcement
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* <R> = 'R' "call bit" used to signalize irregularities in the control facilities,
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* usually ' ', until 2003 indicated transmission via alternate antenna
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*
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* Meinberg GPS receivers
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*
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* For very old devices you must get the Uni-Erlangen firmware for the GPS receiver support
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* to work to full satisfaction !
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* With newer GPS receiver types the Uni Erlangen string format can be configured at the device.
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*
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* <STX><dd>.<mm>.<yy>; <w>; <hh>:<mm>:<ss>; <+/-><00:00>; <U><S><F><D><A><L><R><L>; <position...><ETX>
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*
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* 000000000111111111122222222223333333333444444444455555555556666666
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* 123456789012345678901234567890123456789012345678901234567890123456
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* \x0209.07.93; 5; 08:48:26; +00:00; #*S!A L; 49.5736N 11.0280E 373m\x03
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*
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*
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* <STX> = '\002' ASCII start of text
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* <ETX> = '\003' ASCII end of text
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* <dd>,<mm>,<yy> = day, month, year(2 digits!!)
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* <w> = day of week (sunday= 0)
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* <hh>,<mm>,<ss> = hour, minute, second
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* <+/->,<00:00> = offset to UTC
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* <S> = '#' if never synced since powerup else ' '
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* <F> = '*' if position is not confirmed else ' '
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* <D> = 'S' if daylight saving time is active else ' '
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* <A> = '!' during the hour preceeding an daylight saving time
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* start/end change
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* <L> = 'A' LEAP second announcement
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* <R> = 'R' "call bit" used to signalize irregularities in the control facilities,
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* usually ' ', until 2003 indicated transmission via alternate antenna
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* (reminiscent of PZF receivers)
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* <L> = 'L' on 23:59:60
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*
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* Binary messages have a lead in for a fixed header of SOH
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*/
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/*--------------------------------------------------------------*/
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/* Name: csum() */
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/* */
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/* Purpose: Compute a checksum about a number of bytes */
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/* */
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/* Input: uchar *p address of the first byte */
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/* short n the number of bytes */
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/* */
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/* Output: -- */
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/* */
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/* Ret val: the checksum */
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/*+-------------------------------------------------------------*/
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CSUM
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mbg_csum(
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unsigned char *p,
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unsigned int n
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)
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{
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unsigned int sum = 0;
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unsigned int i;
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for ( i = 0; i < n; i++ )
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sum += *p++;
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return (CSUM) sum;
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} /* csum */
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void
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get_mbg_header(
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unsigned char **bufpp,
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GPS_MSG_HDR *headerp
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)
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{
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headerp->cmd = (GPS_CMD) get_lsb_short(bufpp);
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headerp->len = get_lsb_uint16(bufpp);
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headerp->data_csum = (CSUM) get_lsb_short(bufpp);
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headerp->hdr_csum = (CSUM) get_lsb_short(bufpp);
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}
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static struct format meinberg_fmt[] =
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{
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{
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{
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{ 3, 2}, { 6, 2}, { 9, 2},
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{ 18, 2}, { 21, 2}, { 24, 2},
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{ 14, 1}, { 27, 4}, { 29, 1},
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},
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(const unsigned char *)"\2D: . . ;T: ;U: . . ; \3",
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0
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},
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{ /* special extended FAU Erlangen extended format */
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{
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{ 1, 2}, { 4, 2}, { 7, 2},
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{ 14, 2}, { 17, 2}, { 20, 2},
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{ 11, 1}, { 25, 4}, { 27, 1},
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},
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(const unsigned char *)"\2 . . ; ; : : ; \3",
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MBG_EXTENDED
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},
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{ /* special extended FAU Erlangen GPS format */
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{
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{ 1, 2}, { 4, 2}, { 7, 2},
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{ 14, 2}, { 17, 2}, { 20, 2},
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{ 11, 1}, { 32, 7}, { 35, 1},
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{ 25, 2}, { 28, 2}, { 24, 1}
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},
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(const unsigned char *)"\2 . . ; ; : : ; : ; ; . . ",
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0
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}
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};
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static parse_cvt_fnc_t cvt_meinberg;
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static parse_cvt_fnc_t cvt_mgps;
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static parse_inp_fnc_t mbg_input;
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static parse_inp_fnc_t gps_input;
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struct msg_buf
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{
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unsigned short len; /* len to fill */
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unsigned short phase; /* current input phase */
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};
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#define MBG_NONE 0 /* no data input */
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#define MBG_HEADER 1 /* receiving header */
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#define MBG_DATA 2 /* receiving data */
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#define MBG_STRING 3 /* receiving standard data message */
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clockformat_t clock_meinberg[] =
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{
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{
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mbg_input, /* normal input handling */
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cvt_meinberg, /* Meinberg conversion */
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pps_one, /* easy PPS monitoring */
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0, /* conversion configuration */
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"Meinberg Standard", /* Meinberg simple format - beware */
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32, /* string buffer */
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0 /* no private data (complete packets) */
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},
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{
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mbg_input, /* normal input handling */
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cvt_meinberg, /* Meinberg conversion */
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pps_one, /* easy PPS monitoring */
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0, /* conversion configuration */
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"Meinberg Extended", /* Meinberg enhanced format */
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32, /* string buffer */
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0 /* no private data (complete packets) */
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},
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{
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gps_input, /* no input handling */
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cvt_mgps, /* Meinberg GPS receiver conversion */
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pps_one, /* easy PPS monitoring */
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(void *)&meinberg_fmt[2], /* conversion configuration */
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"Meinberg GPS Extended", /* Meinberg FAU GPS format */
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512, /* string buffer */
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sizeof(struct msg_buf) /* no private data (complete packets) */
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}
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};
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/*
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* parse_cvt_fnc_t cvt_meinberg
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*
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* convert simple type format
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*/
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static u_long
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cvt_meinberg(
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unsigned char *buffer,
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int size,
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struct format *unused,
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clocktime_t *clock_time,
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void *local
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)
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{
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struct format *format;
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/*
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* select automagically correct data format
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*/
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if (Strok(buffer, meinberg_fmt[0].fixed_string))
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{
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format = &meinberg_fmt[0];
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}
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else
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{
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if (Strok(buffer, meinberg_fmt[1].fixed_string))
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{
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format = &meinberg_fmt[1];
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}
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else
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{
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return CVT_FAIL|CVT_BADFMT;
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}
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}
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/*
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* collect data
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*/
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if (Stoi(&buffer[format->field_offsets[O_DAY].offset], &clock_time->day,
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format->field_offsets[O_DAY].length) ||
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Stoi(&buffer[format->field_offsets[O_MONTH].offset], &clock_time->month,
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format->field_offsets[O_MONTH].length) ||
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Stoi(&buffer[format->field_offsets[O_YEAR].offset], &clock_time->year,
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format->field_offsets[O_YEAR].length) ||
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Stoi(&buffer[format->field_offsets[O_HOUR].offset], &clock_time->hour,
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format->field_offsets[O_HOUR].length) ||
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Stoi(&buffer[format->field_offsets[O_MIN].offset], &clock_time->minute,
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format->field_offsets[O_MIN].length) ||
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Stoi(&buffer[format->field_offsets[O_SEC].offset], &clock_time->second,
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format->field_offsets[O_SEC].length))
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{
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return CVT_FAIL|CVT_BADFMT;
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}
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else
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{
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unsigned char *f = &buffer[format->field_offsets[O_FLAGS].offset];
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clock_time->usecond = 0;
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clock_time->flags = PARSEB_S_LEAP;
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if (clock_time->second == 60)
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clock_time->flags |= PARSEB_LEAPSECOND;
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/*
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* in the extended timecode format we have also the
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* indication that the timecode is in UTC
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* for compatibilty reasons we start at the USUAL
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* offset (POWERUP flag) and know that the UTC indication
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* is the character before the powerup flag
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*/
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if ((format->flags & MBG_EXTENDED) && (f[-1] == 'U'))
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{
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/*
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* timecode is in UTC
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*/
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clock_time->utcoffset = 0; /* UTC */
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clock_time->flags |= PARSEB_UTC;
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}
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else
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{
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/*
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* only calculate UTC offset if MET/MED is in time code
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* or we have the old time code format, where we do not
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* know whether it is UTC time or MET/MED
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* pray that nobody switches to UTC in the *old* standard time code
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* ROMS !!!! The new ROMS have 'U' at the ZONE field - good.
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*/
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switch (buffer[format->field_offsets[O_ZONE].offset])
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{
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case ' ':
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clock_time->utcoffset = -1*60*60; /* MET */
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break;
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case 'S':
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clock_time->utcoffset = -2*60*60; /* MED */
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break;
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case 'U':
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/*
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* timecode is in UTC
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*/
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clock_time->utcoffset = 0; /* UTC */
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clock_time->flags |= PARSEB_UTC;
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break;
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default:
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return CVT_FAIL|CVT_BADFMT;
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}
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}
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/*
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* gather status flags
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*/
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if (buffer[format->field_offsets[O_ZONE].offset] == 'S')
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clock_time->flags |= PARSEB_DST;
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if (f[0] == '#')
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clock_time->flags |= PARSEB_POWERUP;
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if (f[1] == '*')
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clock_time->flags |= PARSEB_NOSYNC;
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if (f[3] == '!')
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clock_time->flags |= PARSEB_ANNOUNCE;
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/*
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* oncoming leap second
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* 'a' code not confirmed - earth is not
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* expected to speed up
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*/
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if (f[3] == 'A')
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clock_time->flags |= PARSEB_LEAPADD;
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if (f[3] == 'a')
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clock_time->flags |= PARSEB_LEAPDEL;
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if (format->flags & MBG_EXTENDED)
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{
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clock_time->flags |= PARSEB_S_CALLBIT;
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/*
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* DCF77 does not encode the direction -
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* so we take the current default -
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* earth slowing down
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*/
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clock_time->flags &= ~PARSEB_LEAPDEL;
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if (f[4] == 'A')
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clock_time->flags |= PARSEB_LEAPADD;
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if (f[5] == 'R')
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clock_time->flags |= PARSEB_CALLBIT;
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}
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return CVT_OK;
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}
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}
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/*
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* parse_inp_fnc_t mbg_input
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*
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* grab data from input stream
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*/
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static u_long
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mbg_input(
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parse_t *parseio,
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char ch,
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timestamp_t *tstamp
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)
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{
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unsigned int rtc;
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parseprintf(DD_PARSE, ("mbg_input(0x%p, 0x%x, ...)\n", (void*)parseio, ch));
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switch (ch)
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{
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case STX:
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parseprintf(DD_PARSE, ("mbg_input: STX seen\n"));
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parseio->parse_index = 1;
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parseio->parse_data[0] = ch;
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parseio->parse_dtime.parse_stime = *tstamp; /* collect timestamp */
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return PARSE_INP_SKIP;
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case ETX:
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parseprintf(DD_PARSE, ("mbg_input: ETX seen\n"));
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if ((rtc = parse_addchar(parseio, ch)) == PARSE_INP_SKIP)
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return parse_end(parseio);
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else
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return rtc;
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default:
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return parse_addchar(parseio, ch);
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}
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}
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/*
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* parse_cvt_fnc_t cvt_mgps
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*
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* convert Meinberg GPS format
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*/
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static u_long
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cvt_mgps(
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unsigned char *buffer,
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int size,
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struct format *format,
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clocktime_t *clock_time,
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void *local
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)
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{
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if (!Strok(buffer, format->fixed_string))
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{
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return cvt_meinberg(buffer, size, format, clock_time, local);
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}
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else
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{
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if (Stoi(&buffer[format->field_offsets[O_DAY].offset], &clock_time->day,
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format->field_offsets[O_DAY].length) ||
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Stoi(&buffer[format->field_offsets[O_MONTH].offset], &clock_time->month,
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format->field_offsets[O_MONTH].length) ||
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Stoi(&buffer[format->field_offsets[O_YEAR].offset], &clock_time->year,
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format->field_offsets[O_YEAR].length) ||
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Stoi(&buffer[format->field_offsets[O_HOUR].offset], &clock_time->hour,
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format->field_offsets[O_HOUR].length) ||
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Stoi(&buffer[format->field_offsets[O_MIN].offset], &clock_time->minute,
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format->field_offsets[O_MIN].length) ||
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Stoi(&buffer[format->field_offsets[O_SEC].offset], &clock_time->second,
|
|
format->field_offsets[O_SEC].length))
|
|
{
|
|
return CVT_FAIL|CVT_BADFMT;
|
|
}
|
|
else
|
|
{
|
|
long h;
|
|
unsigned char *f = &buffer[format->field_offsets[O_FLAGS].offset];
|
|
|
|
clock_time->flags = PARSEB_S_LEAP|PARSEB_S_POSITION;
|
|
|
|
clock_time->usecond = 0;
|
|
|
|
/*
|
|
* calculate UTC offset
|
|
*/
|
|
if (Stoi(&buffer[format->field_offsets[O_UTCHOFFSET].offset], &h,
|
|
format->field_offsets[O_UTCHOFFSET].length))
|
|
{
|
|
return CVT_FAIL|CVT_BADFMT;
|
|
}
|
|
else
|
|
{
|
|
if (Stoi(&buffer[format->field_offsets[O_UTCMOFFSET].offset], &clock_time->utcoffset,
|
|
format->field_offsets[O_UTCMOFFSET].length))
|
|
{
|
|
return CVT_FAIL|CVT_BADFMT;
|
|
}
|
|
|
|
clock_time->utcoffset += TIMES60(h);
|
|
clock_time->utcoffset = TIMES60(clock_time->utcoffset);
|
|
|
|
if (buffer[format->field_offsets[O_UTCSOFFSET].offset] != '-')
|
|
{
|
|
clock_time->utcoffset = -clock_time->utcoffset;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* gather status flags
|
|
*/
|
|
if (buffer[format->field_offsets[O_ZONE].offset] == 'S')
|
|
clock_time->flags |= PARSEB_DST;
|
|
|
|
if (clock_time->utcoffset == 0)
|
|
clock_time->flags |= PARSEB_UTC;
|
|
|
|
/*
|
|
* no sv's seen - no time & position
|
|
*/
|
|
if (f[0] == '#')
|
|
clock_time->flags |= PARSEB_POWERUP;
|
|
|
|
/*
|
|
* at least one sv seen - time (for last position)
|
|
*/
|
|
if (f[1] == '*')
|
|
clock_time->flags |= PARSEB_NOSYNC;
|
|
else
|
|
if (!(clock_time->flags & PARSEB_POWERUP))
|
|
clock_time->flags |= PARSEB_POSITION;
|
|
|
|
/*
|
|
* oncoming zone switch
|
|
*/
|
|
if (f[3] == '!')
|
|
clock_time->flags |= PARSEB_ANNOUNCE;
|
|
|
|
/*
|
|
* oncoming leap second
|
|
* 'a' code not confirmed - earth is not
|
|
* expected to speed up
|
|
*/
|
|
if (f[4] == 'A')
|
|
clock_time->flags |= PARSEB_LEAPADD;
|
|
|
|
if (f[4] == 'a')
|
|
clock_time->flags |= PARSEB_LEAPDEL;
|
|
|
|
/*
|
|
* f[5] == ' '
|
|
*/
|
|
|
|
/*
|
|
* this is the leap second
|
|
*/
|
|
if ((f[6] == 'L') || (clock_time->second == 60))
|
|
clock_time->flags |= PARSEB_LEAPSECOND;
|
|
|
|
return CVT_OK;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* parse_inp_fnc_t gps_input
|
|
*
|
|
* grep binary data from input stream
|
|
*/
|
|
static u_long
|
|
gps_input(
|
|
parse_t *parseio,
|
|
char ch,
|
|
timestamp_t *tstamp
|
|
)
|
|
{
|
|
CSUM calc_csum; /* used to compare the incoming csums */
|
|
GPS_MSG_HDR header;
|
|
struct msg_buf *msg_buf;
|
|
|
|
msg_buf = (struct msg_buf *)parseio->parse_pdata;
|
|
|
|
parseprintf(DD_PARSE, ("gps_input(0x%p, 0x%x, ...)\n", (void*)parseio, ch));
|
|
|
|
if (!msg_buf)
|
|
return PARSE_INP_SKIP;
|
|
|
|
if ( msg_buf->phase == MBG_NONE )
|
|
{ /* not receiving yet */
|
|
switch (ch)
|
|
{
|
|
case SOH:
|
|
parseprintf(DD_PARSE, ("gps_input: SOH seen\n"));
|
|
|
|
msg_buf->len = sizeof( header ); /* prepare to receive msg header */
|
|
msg_buf->phase = MBG_HEADER; /* receiving header */
|
|
break;
|
|
|
|
case STX:
|
|
parseprintf(DD_PARSE, ("gps_input: STX seen\n"));
|
|
|
|
msg_buf->len = 0;
|
|
msg_buf->phase = MBG_STRING; /* prepare to receive ASCII ETX delimited message */
|
|
parseio->parse_index = 1;
|
|
parseio->parse_data[0] = ch;
|
|
break;
|
|
|
|
default:
|
|
return PARSE_INP_SKIP; /* keep searching */
|
|
}
|
|
|
|
parseio->parse_dtime.parse_msglen = 1; /* reset buffer pointer */
|
|
parseio->parse_dtime.parse_msg[0] = ch; /* fill in first character */
|
|
parseio->parse_dtime.parse_stime = *tstamp; /* collect timestamp */
|
|
return PARSE_INP_SKIP;
|
|
}
|
|
|
|
/* SOH/STX has already been received */
|
|
|
|
/* save incoming character in both buffers if needbe */
|
|
if ((msg_buf->phase == MBG_STRING) &&
|
|
(parseio->parse_index < parseio->parse_dsize))
|
|
parseio->parse_data[parseio->parse_index++] = ch;
|
|
|
|
parseio->parse_dtime.parse_msg[parseio->parse_dtime.parse_msglen++] = ch;
|
|
|
|
if (parseio->parse_dtime.parse_msglen > sizeof(parseio->parse_dtime.parse_msg))
|
|
{
|
|
msg_buf->phase = MBG_NONE; /* buffer overflow - discard */
|
|
parseio->parse_data[parseio->parse_index] = '\0';
|
|
memcpy(parseio->parse_ldata, parseio->parse_data, (unsigned)(parseio->parse_index+1));
|
|
parseio->parse_ldsize = parseio->parse_index;
|
|
return PARSE_INP_DATA;
|
|
}
|
|
|
|
switch (msg_buf->phase)
|
|
{
|
|
case MBG_HEADER:
|
|
case MBG_DATA:
|
|
msg_buf->len--;
|
|
|
|
if ( msg_buf->len ) /* transfer not complete */
|
|
return PARSE_INP_SKIP;
|
|
|
|
parseprintf(DD_PARSE, ("gps_input: %s complete\n", (msg_buf->phase == MBG_DATA) ? "data" : "header"));
|
|
|
|
break;
|
|
|
|
case MBG_STRING:
|
|
if ((ch == ETX) || (parseio->parse_index >= parseio->parse_dsize))
|
|
{
|
|
msg_buf->phase = MBG_NONE;
|
|
parseprintf(DD_PARSE, ("gps_input: string complete\n"));
|
|
parseio->parse_data[parseio->parse_index] = '\0';
|
|
memcpy(parseio->parse_ldata, parseio->parse_data, (unsigned)(parseio->parse_index+1));
|
|
parseio->parse_ldsize = parseio->parse_index;
|
|
parseio->parse_index = 0;
|
|
return PARSE_INP_TIME;
|
|
}
|
|
else
|
|
{
|
|
return PARSE_INP_SKIP;
|
|
}
|
|
}
|
|
|
|
/* cnt == 0, so the header or the whole message is complete */
|
|
|
|
if ( msg_buf->phase == MBG_HEADER )
|
|
{ /* header complete now */
|
|
unsigned char *datap = parseio->parse_dtime.parse_msg + 1;
|
|
|
|
get_mbg_header(&datap, &header);
|
|
|
|
parseprintf(DD_PARSE, ("gps_input: header: cmd 0x%x, len %d, dcsum 0x%x, hcsum 0x%x\n",
|
|
(int)header.cmd, (int)header.len, (int)header.data_csum,
|
|
(int)header.hdr_csum));
|
|
|
|
|
|
calc_csum = mbg_csum( (unsigned char *) parseio->parse_dtime.parse_msg + 1, (unsigned short)6 );
|
|
|
|
if ( calc_csum != header.hdr_csum )
|
|
{
|
|
parseprintf(DD_PARSE, ("gps_input: header checksum mismatch expected 0x%x, got 0x%x\n",
|
|
(int)calc_csum, (int)mbg_csum( (unsigned char *) parseio->parse_dtime.parse_msg, (unsigned short)6 )));
|
|
|
|
msg_buf->phase = MBG_NONE; /* back to hunting mode */
|
|
return PARSE_INP_DATA; /* invalid header checksum received - pass up for detection */
|
|
}
|
|
|
|
if ((header.len == 0) || /* no data to wait for */
|
|
(header.len >= (sizeof (parseio->parse_dtime.parse_msg) - sizeof(header) - 1))) /* blows anything we have space for */
|
|
{
|
|
msg_buf->phase = MBG_NONE; /* back to hunting mode */
|
|
return (header.len == 0) ? PARSE_INP_DATA : PARSE_INP_SKIP; /* message complete/throwaway */
|
|
}
|
|
|
|
parseprintf(DD_PARSE, ("gps_input: expecting %d bytes of data message\n", (int)header.len));
|
|
|
|
msg_buf->len = header.len;/* save number of bytes to wait for */
|
|
msg_buf->phase = MBG_DATA; /* flag header already complete */
|
|
return PARSE_INP_SKIP;
|
|
}
|
|
|
|
parseprintf(DD_PARSE, ("gps_input: message data complete\n"));
|
|
|
|
/* Header and data have been received. The header checksum has been */
|
|
/* checked */
|
|
|
|
msg_buf->phase = MBG_NONE; /* back to hunting mode */
|
|
return PARSE_INP_DATA; /* message complete, must be evaluated */
|
|
}
|
|
|
|
#else /* not (REFCLOCK && CLOCK_PARSE && CLOCK_MEINBERG) */
|
|
int clk_meinberg_bs;
|
|
#endif /* not (REFCLOCK && CLOCK_PARSE && CLOCK_MEINBERG) */
|
|
|
|
/*
|
|
* History:
|
|
*
|
|
* clk_meinberg.c,v
|
|
* Revision 4.12.2.1 2005/09/25 10:22:35 kardel
|
|
* cleanup buffer bounds
|
|
*
|
|
* Revision 4.12 2005/04/16 17:32:10 kardel
|
|
* update copyright
|
|
*
|
|
* Revision 4.11 2004/11/14 15:29:41 kardel
|
|
* support PPSAPI, upgrade Copyright to Berkeley style
|
|
*
|
|
* Revision 4.8 1999/11/28 09:13:50 kardel
|
|
* RECON_4_0_98F
|
|
*
|
|
* Revision 4.7 1999/02/21 11:09:14 kardel
|
|
* cleanup
|
|
*
|
|
* Revision 4.6 1998/06/14 21:09:36 kardel
|
|
* Sun acc cleanup
|
|
*
|
|
* Revision 4.5 1998/06/13 15:18:54 kardel
|
|
* fix mem*() to b*() function macro emulation
|
|
*
|
|
* Revision 4.4 1998/06/13 12:03:23 kardel
|
|
* fix SYSV clock name clash
|
|
*
|
|
* Revision 4.3 1998/06/12 15:22:28 kardel
|
|
* fix prototypes
|
|
*
|
|
* Revision 4.2 1998/05/24 16:14:42 kardel
|
|
* support current Meinberg standard data formats
|
|
*
|
|
* Revision 4.1 1998/05/24 09:39:52 kardel
|
|
* implementation of the new IO handling model
|
|
*
|
|
* Revision 4.0 1998/04/10 19:45:29 kardel
|
|
* Start 4.0 release version numbering
|
|
*
|
|
* from V3 3.23 - log info deleted 1998/04/11 kardel
|
|
*
|
|
*/
|