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[FreeBSD/releng/9.3.git] / contrib / ntp / libparse / clk_schmid.c
1 /*
2  * /src/NTP/ntp4-dev/libparse/clk_schmid.c,v 4.9 2005/04/16 17:32:10 kardel RELEASE_20050508_A
3  *
4  * clk_schmid.c,v 4.9 2005/04/16 17:32:10 kardel RELEASE_20050508_A
5  *
6  * Schmid clock support
7  * based on information and testing from Adam W. Feigin et. al (Swisstime iis.ethz.ch)
8  *
9  * Copyright (c) 1995-2015 by Frank Kardel <kardel <AT> ntp.org>
10  * Copyright (c) 1989-1994 by Frank Kardel, Friedrich-Alexander Universitaet Erlangen-Nuernberg, Germany
11  *
12  * Redistribution and use in source and binary forms, with or without
13  * modification, are permitted provided that the following conditions
14  * are met:
15  * 1. Redistributions of source code must retain the above copyright
16  *    notice, this list of conditions and the following disclaimer.
17  * 2. Redistributions in binary form must reproduce the above copyright
18  *    notice, this list of conditions and the following disclaimer in the
19  *    documentation and/or other materials provided with the distribution.
20  * 3. Neither the name of the author nor the names of its contributors
21  *    may be used to endorse or promote products derived from this software
22  *    without specific prior written permission.
23  *
24  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34  * SUCH DAMAGE.
35  *
36  */
37
38 #if HAVE_CONFIG_H
39 # include <config.h>
40 #endif
41
42 #if defined(REFCLOCK) && defined(CLOCK_PARSE) && defined(CLOCK_SCHMID)
43
44 #include "ntp_fp.h"
45 #include "ntp_unixtime.h"
46 #include "ntp_calendar.h"
47
48 #include "parse.h"
49
50 #ifndef PARSESTREAM
51 #include "ntp_stdlib.h"
52 #include <stdio.h>
53 #else
54 #include "sys/parsestreams.h"
55 extern int printf (const char *, ...);
56 #endif
57
58 /*
59  * Description courtesy of Adam W. Feigin et. al (Swisstime iis.ethz.ch)
60  *
61  * The command to Schmid's DCF77 clock is a single byte; each bit
62  * allows the user to select some part of the time string, as follows (the
63  * output for the lsb is sent first).
64  *
65  * Bit 0:       time in MEZ, 4 bytes *binary, not BCD*; hh.mm.ss.tenths
66  * Bit 1:       date 3 bytes *binary, not BCD: dd.mm.yy
67  * Bit 2:       week day, 1 byte (unused here)
68  * Bit 3:       time zone, 1 byte, 0=MET, 1=MEST. (unused here)
69  * Bit 4:       clock status, 1 byte,   0=time invalid,
70  *                                      1=time from crystal backup,
71  *                                      3=time from DCF77
72  * Bit 5:       transmitter status, 1 byte,
73  *                                      bit 0: backup antenna
74  *                                      bit 1: time zone change within 1h
75  *                                      bit 3,2: TZ 01=MEST, 10=MET
76  *                                      bit 4: leap second will be
77  *                                              added within one hour
78  *                                      bits 5-7: Zero
79  * Bit 6:       time in backup mode, units of 5 minutes (unused here)
80  *
81  */
82 #define WS_TIME         0x01
83 #define WS_SIGNAL       0x02
84
85 #define WS_CALLBIT      0x01  /* "call bit" used to signalize irregularities in the control facilities */
86 #define WS_ANNOUNCE     0x02
87 #define WS_TZ           0x0c
88 #define   WS_MET        0x08
89 #define   WS_MEST       0x04
90 #define WS_LEAP         0x10
91
92 static parse_cvt_fnc_t cvt_schmid;
93 static parse_inp_fnc_t inp_schmid;
94
95 clockformat_t clock_schmid =
96 {
97   inp_schmid,                   /* no input handling */
98   cvt_schmid,                   /* Schmid conversion */
99   0,                            /* not direct PPS monitoring */
100   0,                            /* conversion configuration */
101   "Schmid",                     /* Schmid receiver */
102   12,                           /* binary data buffer */
103   0,                            /* no private data (complete messages) */
104 };
105
106 /* parse_cvt_fnc_t */
107 static u_long
108 cvt_schmid(
109            unsigned char *buffer,
110            int            size,
111            struct format *format,
112            clocktime_t   *clock_time,
113            void          *local
114         )
115 {
116         if ((size != 11) || (buffer[10] != (unsigned char)'\375'))
117         {
118                 return CVT_NONE;
119         }
120         else
121         {
122                 if (buffer[0] > 23 || buffer[1] > 59 || buffer[2] > 59 || buffer[3] >  9) /* Time */
123                 {
124                         return CVT_FAIL|CVT_BADTIME;
125                 }
126                 else
127                     if (buffer[4] <  1 || buffer[4] > 31 || buffer[5] <  1 || buffer[5] > 12
128                         ||  buffer[6] > 99)
129                     {
130                             return CVT_FAIL|CVT_BADDATE;
131                     }
132                     else
133                     {
134                             clock_time->hour    = buffer[0];
135                             clock_time->minute  = buffer[1];
136                             clock_time->second  = buffer[2];
137                             clock_time->usecond = buffer[3] * 100000;
138                             clock_time->day     = buffer[4];
139                             clock_time->month   = buffer[5];
140                             clock_time->year    = buffer[6];
141
142                             clock_time->flags   = 0;
143
144                             switch (buffer[8] & WS_TZ)
145                             {
146                                 case WS_MET:
147                                     clock_time->utcoffset = -1*60*60;
148                                     break;
149
150                                 case WS_MEST:
151                                     clock_time->utcoffset = -2*60*60;
152                                     clock_time->flags    |= PARSEB_DST;
153                                     break;
154
155                                 default:
156                                     return CVT_FAIL|CVT_BADFMT;
157                             }
158
159                             if (!(buffer[7] & WS_TIME))
160                             {
161                                     clock_time->flags |= PARSEB_POWERUP;
162                             }
163
164                             if (!(buffer[7] & WS_SIGNAL))
165                             {
166                                     clock_time->flags |= PARSEB_NOSYNC;
167                             }
168
169                             if (buffer[7] & WS_SIGNAL)
170                             {
171                                     if (buffer[8] & WS_CALLBIT)
172                                     {
173                                             clock_time->flags |= PARSEB_CALLBIT;
174                                     }
175
176                                     if (buffer[8] & WS_ANNOUNCE)
177                                     {
178                                             clock_time->flags |= PARSEB_ANNOUNCE;
179                                     }
180
181                                     if (buffer[8] & WS_LEAP)
182                                     {
183                                             clock_time->flags |= PARSEB_LEAPADD; /* default: DCF77 data format deficiency */
184                                     }
185                             }
186
187                             clock_time->flags |= PARSEB_S_LEAP|PARSEB_S_CALLBIT;
188
189                             return CVT_OK;
190                     }
191         }
192 }
193
194 /*
195  * parse_inp_fnc_t inp_schmid
196  *
197  * grab data from input stream
198  */
199 static u_long
200 inp_schmid(
201           parse_t      *parseio,
202           char         ch,
203           timestamp_t  *tstamp
204           )
205 {
206         unsigned int rtc;
207
208         parseprintf(DD_PARSE, ("inp_schmid(0x%p, 0x%x, ...)\n", (void*)parseio, ch));
209
210         switch ((uint8_t)ch)
211         {
212         case 0xFD:              /*  */
213                 parseprintf(DD_PARSE, ("inp_schmid: 0xFD seen\n"));
214                 if ((rtc = parse_addchar(parseio, ch)) == PARSE_INP_SKIP)
215                         return parse_end(parseio);
216                 else
217                         return rtc;
218
219         default:
220                 return parse_addchar(parseio, ch);
221         }
222 }
223
224 #else /* not (REFCLOCK && CLOCK_PARSE && CLOCK_SCHMID) */
225 int clk_schmid_bs;
226 #endif /* not (REFCLOCK && CLOCK_PARSE && CLOCK_SCHMID) */
227
228 /*
229  * History:
230  *
231  * clk_schmid.c,v
232  * Revision 4.9  2005/04/16 17:32:10  kardel
233  * update copyright
234  *
235  * Revision 4.8  2004/11/14 15:29:41  kardel
236  * support PPSAPI, upgrade Copyright to Berkeley style
237  *
238  * Revision 4.5  1999/11/28 09:13:51  kardel
239  * RECON_4_0_98F
240  *
241  * Revision 4.4  1998/06/13 12:06:03  kardel
242  * fix SYSV clock name clash
243  *
244  * Revision 4.3  1998/06/12 15:22:29  kardel
245  * fix prototypes
246  *
247  * Revision 4.2  1998/06/12 09:13:26  kardel
248  * conditional compile macros fixed
249  * printf prototype
250  *
251  * Revision 4.1  1998/05/24 09:39:53  kardel
252  * implementation of the new IO handling model
253  *
254  * Revision 4.0  1998/04/10 19:45:31  kardel
255  * Start 4.0 release version numbering
256  *
257  * from V3 3.22 log info deleted 1998/04/11 kardel
258  */