3 * Refclock_neoclock4x.c
4 * - NeoClock4X driver for DCF77 or FIA Timecode
6 * Date: 2009-12-04 v1.16
8 * see http://www.linum.com/redir/jump/id=neoclock4x&action=redir
9 * for details about the NeoClock4X device
17 #if defined(REFCLOCK) && (defined(CLOCK_NEOCLOCK4X))
21 #include <sys/types.h>
23 #include <sys/ioctl.h>
28 #include "ntp_control.h"
29 #include "ntp_refclock.h"
30 #include "ntp_unixtime.h"
31 #include "ntp_stdlib.h"
33 #if defined HAVE_SYS_MODEM_H
34 # include <sys/modem.h>
36 # define TIOCMSET MCSETA
37 # define TIOCMGET MCGETA
38 # define TIOCM_RTS MRTS
43 # ifdef TERMIOS_NEEDS__SVID3
47 # ifdef TERMIOS_NEEDS__SVID3
52 #ifdef HAVE_SYS_IOCTL_H
53 # include <sys/ioctl.h>
57 * NTP version 4.20 change the pp->msec field to pp->nsec.
58 * To allow to support older ntp versions with this sourcefile
59 * you can define NTP_PRE_420 to allow this driver to compile
60 * with ntp version back to 4.1.2.
68 * If you want the driver for whatever reason to not use
69 * the TX line to send anything to your NeoClock4X
70 * device you must tell the NTP refclock driver which
71 * firmware you NeoClock4X device uses.
73 * If you want to enable this feature change the "#if 0"
74 * line to "#if 1" and make sure that the defined firmware
75 * matches the firmware off your NeoClock4X receiver!
80 #define NEOCLOCK4X_FIRMWARE NEOCLOCK4X_FIRMWARE_VERSION_A
83 /* at this time only firmware version A is known */
84 #define NEOCLOCK4X_FIRMWARE_VERSION_A 'A'
86 #define NEOCLOCK4X_TIMECODELEN 37
88 #define NEOCLOCK4X_OFFSET_SERIAL 3
89 #define NEOCLOCK4X_OFFSET_RADIOSIGNAL 9
90 #define NEOCLOCK4X_OFFSET_DAY 12
91 #define NEOCLOCK4X_OFFSET_MONTH 14
92 #define NEOCLOCK4X_OFFSET_YEAR 16
93 #define NEOCLOCK4X_OFFSET_HOUR 18
94 #define NEOCLOCK4X_OFFSET_MINUTE 20
95 #define NEOCLOCK4X_OFFSET_SECOND 22
96 #define NEOCLOCK4X_OFFSET_HSEC 24
97 #define NEOCLOCK4X_OFFSET_DOW 26
98 #define NEOCLOCK4X_OFFSET_TIMESOURCE 28
99 #define NEOCLOCK4X_OFFSET_DSTSTATUS 29
100 #define NEOCLOCK4X_OFFSET_QUARZSTATUS 30
101 #define NEOCLOCK4X_OFFSET_ANTENNA1 31
102 #define NEOCLOCK4X_OFFSET_ANTENNA2 33
103 #define NEOCLOCK4X_OFFSET_CRC 35
105 #define NEOCLOCK4X_DRIVER_VERSION "1.16 (2009-12-04)"
107 #define NSEC_TO_MILLI 1000000
109 struct neoclock4x_unit {
110 l_fp laststamp; /* last receive timestamp */
111 short unit; /* NTP refclock unit number */
112 u_long polled; /* flag to detect noreplies */
113 char leap_status; /* leap second flag */
134 static int neoclock4x_start (int, struct peer *);
135 static void neoclock4x_shutdown (int, struct peer *);
136 static void neoclock4x_receive (struct recvbuf *);
137 static void neoclock4x_poll (int, struct peer *);
138 static void neoclock4x_control (int, const struct refclockstat *, struct refclockstat *, struct peer *);
140 static int neol_atoi_len (const char str[], int *, int);
141 static int neol_hexatoi_len (const char str[], int *, int);
142 static void neol_jdn_to_ymd (unsigned long, int *, int *, int *);
143 static void neol_localtime (unsigned long, int* , int*, int*, int*, int*, int*);
144 static unsigned long neol_mktime (int, int, int, int, int, int);
145 #if !defined(NEOCLOCK4X_FIRMWARE)
146 static int neol_query_firmware (int, int, char *, size_t);
147 static int neol_check_firmware (int, const char*, char *);
150 struct refclock refclock_neoclock4x = {
151 neoclock4x_start, /* start up driver */
152 neoclock4x_shutdown, /* shut down driver */
153 neoclock4x_poll, /* transmit poll message */
155 noentry, /* initialize driver (not used) */
156 noentry, /* not used */
157 NOFLAGS /* not used */
161 neoclock4x_start(int unit,
164 struct neoclock4x_unit *up;
165 struct refclockproc *pp;
169 #if defined(HAVE_TERMIOS)
170 struct termios termsettings;
172 #if !defined(NEOCLOCK4X_FIRMWARE)
176 (void) snprintf(dev, sizeof(dev)-1, "/dev/neoclock4x-%d", unit);
178 /* LDISC_STD, LDISC_RAW
179 * Open serial port. Use CLK line discipline, if available.
181 fd = refclock_open(dev, B2400, LDISC_STD);
187 #if defined(HAVE_TERMIOS)
190 if(tcgetattr(fd, &termsettings) < 0)
192 msyslog(LOG_CRIT, "NeoClock4X(%d): (tcgetattr) can't query serial port settings: %m", unit);
198 termsettings.c_iflag = IGNBRK | IGNPAR | ICRNL;
199 termsettings.c_oflag = 0;
200 termsettings.c_cflag = CS8 | CSTOPB | CLOCAL | CREAD;
201 (void)cfsetispeed(&termsettings, (u_int)B2400);
202 (void)cfsetospeed(&termsettings, (u_int)B2400);
204 if(tcsetattr(fd, TCSANOW, &termsettings) < 0)
206 msyslog(LOG_CRIT, "NeoClock4X(%d): (tcsetattr) can't set serial port 2400 8N2: %m", unit);
212 if(tcgetattr(fd, &termsettings) < 0)
214 msyslog(LOG_CRIT, "NeoClock4X(%d): (tcgetattr) can't query serial port settings: %m", unit);
220 termsettings.c_cflag &= ~PARENB;
221 termsettings.c_cflag |= CSTOPB;
222 termsettings.c_cflag &= ~CSIZE;
223 termsettings.c_cflag |= CS8;
225 if(tcsetattr(fd, TCSANOW, &termsettings) < 0)
227 msyslog(LOG_CRIT, "NeoClock4X(%d): (tcsetattr) can't set serial port 2400 8N2: %m", unit);
233 #elif defined(HAVE_SYSV_TTYS)
234 if(ioctl(fd, TCGETA, &termsettings) < 0)
236 msyslog(LOG_CRIT, "NeoClock4X(%d): (TCGETA) can't query serial port settings: %m", unit);
242 termsettings.c_cflag &= ~PARENB;
243 termsettings.c_cflag |= CSTOPB;
244 termsettings.c_cflag &= ~CSIZE;
245 termsettings.c_cflag |= CS8;
247 if(ioctl(fd, TCSETA, &termsettings) < 0)
249 msyslog(LOG_CRIT, "NeoClock4X(%d): (TSGETA) can't set serial port 2400 8N2: %m", unit);
254 msyslog(LOG_EMERG, "NeoClock4X(%d): don't know how to set port to 2400 8N2 with this OS!", unit);
259 #if defined(TIOCMSET) && (defined(TIOCM_RTS) || defined(CIOCM_RTS))
260 /* turn on RTS, and DTR for power supply */
261 /* NeoClock4x is powered from serial line */
262 if(ioctl(fd, TIOCMGET, (caddr_t)&sl232) == -1)
264 msyslog(LOG_CRIT, "NeoClock4X(%d): can't query RTS/DTR state: %m", unit);
269 sl232 = sl232 | TIOCM_DTR | TIOCM_RTS; /* turn on RTS, and DTR for power supply */
271 sl232 = sl232 | CIOCM_DTR | CIOCM_RTS; /* turn on RTS, and DTR for power supply */
273 if(ioctl(fd, TIOCMSET, (caddr_t)&sl232) == -1)
275 msyslog(LOG_CRIT, "NeoClock4X(%d): can't set RTS/DTR to power neoclock4x: %m", unit);
280 msyslog(LOG_EMERG, "NeoClock4X(%d): don't know how to set DTR/RTS to power NeoClock4X with this OS!",
286 up = (struct neoclock4x_unit *) emalloc(sizeof(struct neoclock4x_unit));
289 msyslog(LOG_ERR, "NeoClock4X(%d): can't allocate memory for: %m",unit);
294 memset((char *)up, 0, sizeof(struct neoclock4x_unit));
296 pp->clockdesc = "NeoClock4X";
298 pp->io.clock_recv = neoclock4x_receive;
299 pp->io.srcclock = peer;
303 * no fudge time is given by user!
304 * use 169.583333 ms to compensate the serial line delay
306 * 2400 Baud / 11 bit = 218.18 charaters per second
307 * (NeoClock4X timecode len)
309 pp->fudgetime1 = (NEOCLOCK4X_TIMECODELEN * 11) / 2400.0;
312 * Initialize miscellaneous variables
314 peer->precision = -10;
315 memcpy((char *)&pp->refid, "neol", 4);
319 strlcpy(up->firmware, "?", sizeof(up->firmware));
320 up->firmwaretag = '?';
321 strlcpy(up->serial, "?", sizeof(up->serial));
322 strlcpy(up->radiosignal, "?", sizeof(up->radiosignal));
323 up->timesource = '?';
325 up->quarzstatus = '?';
336 #if defined(NEOCLOCK4X_FIRMWARE)
337 #if NEOCLOCK4X_FIRMWARE == NEOCLOCK4X_FIRMWARE_VERSION_A
338 strlcpy(up->firmware, "(c) 2002 NEOL S.A. FRANCE / L0.01 NDF:A:* (compile time)",
339 sizeof(up->firmware));
340 up->firmwaretag = 'A';
342 msyslog(LOG_EMERG, "NeoClock4X(%d): unknown firmware defined at compile time for NeoClock4X",
351 for(tries=0; tries < 5; tries++)
354 msyslog(LOG_INFO, "NeoClock4X(%d): checking NeoClock4X firmware version (%d/5)", unit, tries);
355 /* wait 3 seconds for receiver to power up */
357 if(neol_query_firmware(pp->io.fd, up->unit, up->firmware, sizeof(up->firmware)))
363 /* can I handle this firmware version? */
364 if(!neol_check_firmware(up->unit, up->firmware, &up->firmwaretag))
374 if(!io_addclock(&pp->io))
376 msyslog(LOG_ERR, "NeoClock4X(%d): error add peer to ntpd: %m", unit);
385 msyslog(LOG_INFO, "NeoClock4X(%d): receiver setup successful done", unit);
391 neoclock4x_shutdown(int unit,
394 struct neoclock4x_unit *up;
395 struct refclockproc *pp;
408 #if defined(TIOCMSET) && (defined(TIOCM_RTS) || defined(CIOCM_RTS))
409 /* turn on RTS, and DTR for power supply */
410 /* NeoClock4x is powered from serial line */
411 if(ioctl(pp->io.fd, TIOCMGET, (caddr_t)&sl232) == -1)
413 msyslog(LOG_CRIT, "NeoClock4X(%d): can't query RTS/DTR state: %m",
417 /* turn on RTS, and DTR for power supply */
418 sl232 &= ~(TIOCM_DTR | TIOCM_RTS);
420 /* turn on RTS, and DTR for power supply */
421 sl232 &= ~(CIOCM_DTR | CIOCM_RTS);
423 if(ioctl(pp->io.fd, TIOCMSET, (caddr_t)&sl232) == -1)
425 msyslog(LOG_CRIT, "NeoClock4X(%d): can't set RTS/DTR to power neoclock4x: %m",
429 io_closeclock(&pp->io);
437 msyslog(LOG_ERR, "NeoClock4X(%d): shutdown", unit);
440 msyslog(LOG_INFO, "NeoClock4X(%d): receiver shutdown done", unit);
444 neoclock4x_receive(struct recvbuf *rbufp)
446 struct neoclock4x_unit *up;
447 struct refclockproc *pp;
449 unsigned long calc_utc;
451 int month; /* ddd conversion */
454 unsigned char calc_chksum;
457 peer = rbufp->recv_peer;
461 /* wait till poll interval is reached */
465 /* reset poll interval flag */
468 /* read last received timecode */
469 pp->lencode = refclock_gtlin(rbufp, pp->a_lastcode, BMAX, &pp->lastrec);
470 pp->leap = LEAP_NOWARNING;
472 if(NEOCLOCK4X_TIMECODELEN != pp->lencode)
474 NLOG(NLOG_CLOCKEVENT)
475 msyslog(LOG_WARNING, "NeoClock4X(%d): received data has invalid length, expected %d bytes, received %d bytes: %s",
476 up->unit, NEOCLOCK4X_TIMECODELEN, pp->lencode, pp->a_lastcode);
477 refclock_report(peer, CEVNT_BADREPLY);
481 neol_hexatoi_len(&pp->a_lastcode[NEOCLOCK4X_OFFSET_CRC], &recv_chksum, 2);
483 /* calculate checksum */
485 for(c=0; c < NEOCLOCK4X_OFFSET_CRC; c++)
487 calc_chksum += pp->a_lastcode[c];
489 if(recv_chksum != calc_chksum)
491 NLOG(NLOG_CLOCKEVENT)
492 msyslog(LOG_WARNING, "NeoClock4X(%d): received data has invalid chksum: %s",
493 up->unit, pp->a_lastcode);
494 refclock_report(peer, CEVNT_BADREPLY);
498 /* Allow synchronization even is quartz clock is
500 * WARNING: This is dangerous!
502 up->quarzstatus = pp->a_lastcode[NEOCLOCK4X_OFFSET_QUARZSTATUS];
503 if(0==(pp->sloppyclockflag & CLK_FLAG2))
505 if('I' != up->quarzstatus)
507 NLOG(NLOG_CLOCKEVENT)
508 msyslog(LOG_NOTICE, "NeoClock4X(%d): quartz clock is not initialized: %s",
509 up->unit, pp->a_lastcode);
510 pp->leap = LEAP_NOTINSYNC;
511 refclock_report(peer, CEVNT_BADDATE);
515 if('I' != up->quarzstatus)
517 NLOG(NLOG_CLOCKEVENT)
518 msyslog(LOG_NOTICE, "NeoClock4X(%d): using uninitialized quartz clock for time synchronization: %s",
519 up->unit, pp->a_lastcode);
523 * If NeoClock4X is not synchronized to a radio clock
524 * check if we're allowed to synchronize with the quartz
527 up->timesource = pp->a_lastcode[NEOCLOCK4X_OFFSET_TIMESOURCE];
528 if(0==(pp->sloppyclockflag & CLK_FLAG2))
530 if('A' != up->timesource)
532 /* not allowed to sync with quartz clock */
533 if(0==(pp->sloppyclockflag & CLK_FLAG1))
535 refclock_report(peer, CEVNT_BADTIME);
536 pp->leap = LEAP_NOTINSYNC;
542 /* this should only used when first install is done */
543 if(pp->sloppyclockflag & CLK_FLAG4)
545 msyslog(LOG_DEBUG, "NeoClock4X(%d): received data: %s",
546 up->unit, pp->a_lastcode);
549 /* 123456789012345678901234567890123456789012345 */
550 /* S/N123456DCF1004021010001202ASX1213CR\r\n */
552 neol_atoi_len(&pp->a_lastcode[NEOCLOCK4X_OFFSET_YEAR], &pp->year, 2);
553 neol_atoi_len(&pp->a_lastcode[NEOCLOCK4X_OFFSET_MONTH], &month, 2);
554 neol_atoi_len(&pp->a_lastcode[NEOCLOCK4X_OFFSET_DAY], &day, 2);
555 neol_atoi_len(&pp->a_lastcode[NEOCLOCK4X_OFFSET_HOUR], &pp->hour, 2);
556 neol_atoi_len(&pp->a_lastcode[NEOCLOCK4X_OFFSET_MINUTE], &pp->minute, 2);
557 neol_atoi_len(&pp->a_lastcode[NEOCLOCK4X_OFFSET_SECOND], &pp->second, 2);
558 neol_atoi_len(&pp->a_lastcode[NEOCLOCK4X_OFFSET_HSEC], &dsec, 2);
559 #if defined(NTP_PRE_420)
560 pp->msec = dsec * 10; /* convert 1/100s from neoclock to real miliseconds */
562 pp->nsec = dsec * 10 * NSEC_TO_MILLI; /* convert 1/100s from neoclock to nanoseconds */
565 memcpy(up->radiosignal, &pp->a_lastcode[NEOCLOCK4X_OFFSET_RADIOSIGNAL], 3);
566 up->radiosignal[3] = 0;
567 memcpy(up->serial, &pp->a_lastcode[NEOCLOCK4X_OFFSET_SERIAL], 6);
569 up->dststatus = pp->a_lastcode[NEOCLOCK4X_OFFSET_DSTSTATUS];
570 neol_hexatoi_len(&pp->a_lastcode[NEOCLOCK4X_OFFSET_ANTENNA1], &up->antenna1, 2);
571 neol_hexatoi_len(&pp->a_lastcode[NEOCLOCK4X_OFFSET_ANTENNA2], &up->antenna2, 2);
574 Validate received values at least enough to prevent internal
575 array-bounds problems, etc.
577 if((pp->hour < 0) || (pp->hour > 23) ||
578 (pp->minute < 0) || (pp->minute > 59) ||
579 (pp->second < 0) || (pp->second > 60) /*Allow for leap seconds.*/ ||
580 (day < 1) || (day > 31) ||
581 (month < 1) || (month > 12) ||
582 (pp->year < 0) || (pp->year > 99)) {
583 /* Data out of range. */
584 NLOG(NLOG_CLOCKEVENT)
585 msyslog(LOG_WARNING, "NeoClock4X(%d): date/time out of range: %s",
586 up->unit, pp->a_lastcode);
587 refclock_report(peer, CEVNT_BADDATE);
591 /* Year-2000 check not needed anymore. Same problem
592 * will arise at 2099 but what should we do...?
594 * wrap 2-digit date into 4-digit
596 * if(pp->year < YEAR_PIVOT)
603 /* adjust NeoClock4X local time to UTC */
604 calc_utc = neol_mktime(pp->year, month, day, pp->hour, pp->minute, pp->second);
606 /* adjust NeoClock4X daylight saving time if needed */
607 if('S' == up->dststatus)
609 neol_localtime(calc_utc, &pp->year, &month, &day, &pp->hour, &pp->minute, &pp->second);
614 pp->day = ymd2yd(pp->year, month, day);
617 if(pp->sloppyclockflag & CLK_FLAG4)
619 msyslog(LOG_DEBUG, "NeoClock4X(%d): calculated UTC date/time: %04d-%02d-%02d %02d:%02d:%02d.%03ld",
621 pp->year, month, day,
622 pp->hour, pp->minute, pp->second,
623 #if defined(NTP_PRE_420)
626 pp->nsec/NSEC_TO_MILLI
631 up->utc_year = pp->year;
632 up->utc_month = month;
634 up->utc_hour = pp->hour;
635 up->utc_minute = pp->minute;
636 up->utc_second = pp->second;
637 #if defined(NTP_PRE_420)
638 up->utc_msec = pp->msec;
640 up->utc_msec = pp->nsec/NSEC_TO_MILLI;
643 if(!refclock_process(pp))
645 NLOG(NLOG_CLOCKEVENT)
646 msyslog(LOG_WARNING, "NeoClock4X(%d): refclock_process failed!", up->unit);
647 refclock_report(peer, CEVNT_FAULT);
650 refclock_receive(peer);
652 /* report good status */
653 refclock_report(peer, CEVNT_NOMINAL);
655 record_clock_stats(&peer->srcadr, pp->a_lastcode);
659 neoclock4x_poll(int unit,
662 struct neoclock4x_unit *up;
663 struct refclockproc *pp;
673 neoclock4x_control(int unit,
674 const struct refclockstat *in,
675 struct refclockstat *out,
678 struct neoclock4x_unit *up;
679 struct refclockproc *pp;
683 msyslog(LOG_ERR, "NeoClock4X(%d): control: unit invalid/inactive", unit);
690 msyslog(LOG_ERR, "NeoClock4X(%d): control: unit invalid/inactive", unit);
697 msyslog(LOG_ERR, "NeoClock4X(%d): control: unit invalid/inactive", unit);
703 /* check to see if a user supplied time offset is given */
704 if(in->haveflags & CLK_HAVETIME1)
706 pp->fudgetime1 = in->fudgetime1;
708 msyslog(LOG_NOTICE, "NeoClock4X(%d): using fudgetime1 with %0.5fs from ntp.conf.",
709 unit, pp->fudgetime1);
713 if(pp->sloppyclockflag & CLK_FLAG1)
716 msyslog(LOG_NOTICE, "NeoClock4X(%d): quartz clock is used to synchronize time if radio clock has no reception.", unit);
721 msyslog(LOG_NOTICE, "NeoClock4X(%d): time is only adjusted with radio signal reception.", unit);
730 out->kv_list = (struct ctl_var *)0;
731 out->type = REFCLK_NEOCLOCK4X;
733 snprintf(tmpbuf, sizeof(tmpbuf)-1,
734 "%04d-%02d-%02d %02d:%02d:%02d.%03d",
735 up->utc_year, up->utc_month, up->utc_day,
736 up->utc_hour, up->utc_minute, up->utc_second,
738 tt = add_var(&out->kv_list, sizeof(tmpbuf)-1, RO|DEF);
739 snprintf(tt, sizeof(tmpbuf)-1, "calc_utc=\"%s\"", tmpbuf);
741 tt = add_var(&out->kv_list, 40, RO|DEF);
742 snprintf(tt, 39, "radiosignal=\"%s\"", up->radiosignal);
743 tt = add_var(&out->kv_list, 40, RO|DEF);
744 snprintf(tt, 39, "antenna1=\"%d\"", up->antenna1);
745 tt = add_var(&out->kv_list, 40, RO|DEF);
746 snprintf(tt, 39, "antenna2=\"%d\"", up->antenna2);
747 tt = add_var(&out->kv_list, 40, RO|DEF);
748 if('A' == up->timesource)
749 snprintf(tt, 39, "timesource=\"radio\"");
750 else if('C' == up->timesource)
751 snprintf(tt, 39, "timesource=\"quartz\"");
753 snprintf(tt, 39, "timesource=\"unknown\"");
754 tt = add_var(&out->kv_list, 40, RO|DEF);
755 if('I' == up->quarzstatus)
756 snprintf(tt, 39, "quartzstatus=\"synchronized\"");
757 else if('X' == up->quarzstatus)
758 snprintf(tt, 39, "quartzstatus=\"not synchronized\"");
760 snprintf(tt, 39, "quartzstatus=\"unknown\"");
761 tt = add_var(&out->kv_list, 40, RO|DEF);
762 if('S' == up->dststatus)
763 snprintf(tt, 39, "dststatus=\"summer\"");
764 else if('W' == up->dststatus)
765 snprintf(tt, 39, "dststatus=\"winter\"");
767 snprintf(tt, 39, "dststatus=\"unknown\"");
768 tt = add_var(&out->kv_list, 80, RO|DEF);
769 snprintf(tt, 79, "firmware=\"%s\"", up->firmware);
770 tt = add_var(&out->kv_list, 40, RO|DEF);
771 snprintf(tt, 39, "firmwaretag=\"%c\"", up->firmwaretag);
772 tt = add_var(&out->kv_list, 80, RO|DEF);
773 snprintf(tt, 79, "driver version=\"%s\"", NEOCLOCK4X_DRIVER_VERSION);
774 tt = add_var(&out->kv_list, 80, RO|DEF);
775 snprintf(tt, 79, "serialnumber=\"%s\"", up->serial);
780 neol_hexatoi_len(const char str[],
788 for(i=0; isxdigit((unsigned char)str[i]) && i < maxlen; i++)
790 hexdigit = isdigit((unsigned char)str[i]) ? toupper((unsigned char)str[i]) - '0' : toupper((unsigned char)str[i]) - 'A' + 10;
791 n = 16 * n + hexdigit;
798 neol_atoi_len(const char str[],
806 for(i=0; isdigit((unsigned char)str[i]) && i < maxlen; i++)
808 digit = str[i] - '0';
815 /* Converts Gregorian date to seconds since 1970-01-01 00:00:00.
816 * Assumes input in normal date format, i.e. 1980-12-31 23:59:59
817 * => year=1980, mon=12, day=31, hour=23, min=59, sec=59.
819 * [For the Julian calendar (which was used in Russia before 1917,
820 * Britain & colonies before 1752, anywhere else before 1582,
821 * and is still in use by some communities) leave out the
822 * -year/100+year/400 terms, and add 10.]
824 * This algorithm was first published by Gauss (I think).
826 * WARNING: this function will overflow on 2106-02-07 06:28:16 on
827 * machines were long is 32-bit! (However, as time_t is signed, we
828 * will already get problems at other places on 2038-01-19 03:14:08)
831 neol_mktime(int year,
838 if (0 >= (int) (mon -= 2)) { /* 1..12 . 11,12,1..10 */
839 mon += 12; /* Puts Feb last since it has leap day */
843 (unsigned long)(year/4 - year/100 + year/400 + 367*mon/12 + day) +
845 )*24 + hour /* now have hours */
846 )*60 + min /* now have minutes */
847 )*60 + sec; /* finally seconds */
851 neol_localtime(unsigned long utc,
866 /* JDN Date 1/1/1970 */
867 neol_jdn_to_ymd(utc + 2440588L, year, month, day);
871 neol_jdn_to_ymd(unsigned long jdn,
876 unsigned long x, z, m, d, y;
877 unsigned long daysPer400Years = 146097UL;
878 unsigned long fudgedDaysPer4000Years = 1460970UL + 31UL;
881 z = 4UL * x / daysPer400Years;
882 x = x - (daysPer400Years * z + 3UL) / 4UL;
883 y = 4000UL * (x + 1) / fudgedDaysPer4000Years;
884 x = x - 1461UL * y / 4UL + 31UL;
885 m = 80UL * x / 2447UL;
886 d = x - 2447UL * m / 80UL;
888 m = m + 2UL - 12UL * x;
889 y = 100UL * (z - 49UL) + y + x;
896 #if !defined(NEOCLOCK4X_FIRMWARE)
898 neol_query_firmware(int fd,
908 int last_crlf_conv_len;
914 /* wait a little bit */
916 if(-1 != write(fd, "V", 1))
918 /* wait a little bit */
920 memset(tmpbuf, 0x00, sizeof(tmpbuf));
925 last_crlf_conv_len = 0;
933 msyslog(LOG_ERR, "NeoClock4X(%d): can't read firmware version (timeout)", unit);
934 strlcpy(tmpbuf, "unknown due to timeout", sizeof(tmpbuf));
939 msyslog(LOG_ERR, "NeoClock4X(%d): can't read firmware version (garbage)", unit);
940 strlcpy(tmpbuf, "unknown due to garbage input", sizeof(tmpbuf));
943 if(-1 == read(fd, &c, 1))
947 msyslog(LOG_DEBUG, "NeoClock4x(%d): read: %m", unit);
963 if(0xA9 != c) /* wait for (c) char in input stream */
966 strlcpy(tmpbuf, "(c)", sizeof(tmpbuf));
973 msyslog(LOG_NOTICE, "NeoClock4X(%d): firmware %c = %02Xh", unit, c, c);
976 if(0x0A == c || 0x0D == c)
981 ptr = strstr(&tmpbuf[lastsearch], "S/N");
984 tmpbuf[last_crlf_conv_len] = 0;
988 /* convert \n to / */
989 last_crlf_conv_len = len;
1001 tmpbuf[len++] = (char) c;
1004 if (len > sizeof(tmpbuf)-5)
1010 msyslog(LOG_ERR, "NeoClock4X(%d): can't query firmware version", unit);
1011 strlcpy(tmpbuf, "unknown error", sizeof(tmpbuf));
1013 if (strlcpy(firmware, tmpbuf, maxlen) >= maxlen)
1014 strlcpy(firmware, "buffer too small", maxlen);
1018 NLOG(NLOG_CLOCKINFO)
1019 msyslog(LOG_INFO, "NeoClock4X(%d): firmware version: %s", unit, firmware);
1021 if(strstr(firmware, "/R2"))
1023 msyslog(LOG_INFO, "NeoClock4X(%d): Your NeoClock4X uses the new R2 firmware release. Please note the changed LED behaviour.", unit);
1032 neol_check_firmware(int unit,
1033 const char *firmware,
1039 ptr = strstr(firmware, "NDF:");
1042 if((strlen(firmware) - strlen(ptr)) >= 7)
1044 if(':' == *(ptr+5) && '*' == *(ptr+6))
1045 *firmwaretag = *(ptr+4);
1049 if('A' != *firmwaretag)
1051 msyslog(LOG_CRIT, "NeoClock4X(%d): firmware version \"%c\" not supported with this driver version!", unit, *firmwaretag);
1060 int refclock_neoclock4x_bs;
1061 #endif /* REFCLOCK */
1065 * refclock_neoclock4x.c
1068 * Revision 1.0 first release
1071 * preparing for bitkeeper reposity
1075 * - don't assume sprintf returns an int anymore
1076 * - change the way the firmware version is read
1077 * - some customers would like to put a device called
1078 * data diode to the NeoClock4X device to disable
1079 * the write line. We need to now the firmware
1080 * version even in this case. We made a compile time
1081 * definition in this case. The code was previously
1082 * only available on request.
1086 * - changing xprinf to xnprinf to avoid buffer overflows
1087 * - change some logic
1088 * - fixed memory leaks if drivers can't initialize
1093 * - add code to support FreeBSD
1097 * - fix reporting of clock status
1098 * changes. previously a bad clock
1099 * status was never reset.
1103 * - open serial port in a way
1104 * AIX and some other OS can
1105 * handle much better
1109 * - remove some unsued #ifdefs
1110 * - fix nsec calculation, closes #499
1114 * - change license to ntp COPYRIGHT notice. This should allow Debian
1115 * to add this refclock driver in further releases.
1116 * - detect R2 hardware