1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
/*
* ntp_refclock.h - definitions for reference clock support
*/
#include "ntp_types.h"
#if !defined(SYSV_TTYS) && !defined(STREAM) & !defined(BSD_TTYS)
#define BSD_TTYS
#endif /* SYSV_TTYS STREAM BSD_TTYS */
/*
* Macros to determine the clock type and unit numbers from a
* 127.127.t.u address.
*/
#define REFCLOCKTYPE(srcadr) ((SRCADR(srcadr) >> 8) & 0xff)
#define REFCLOCKUNIT(srcadr) (SRCADR(srcadr) & 0xff)
/*
* list of reference clock names
* see lib/clocktypes.c (must also agree with xntpd/refclock_conf.c)
*/
struct clktype {
int code; /* driver "major" number */
char *clocktype; /* LONG description */
char *abbrev; /* short description */
};
/*
* Definitions for default values
*/
#define noentry 0 /* flag for null routine */
/*
* Definitions for flags
*/
#define NOFLAGS 0
#define REF_FLAG_BCLIENT 0x1 /* clock prefers to run as a bclient */
/*
* Flag values
*/
#define CLK_HAVETIME1 0x1
#define CLK_HAVETIME2 0x2
#define CLK_HAVEVAL1 0x4
#define CLK_HAVEVAL2 0x8
#define CLK_FLAG1 0x1
#define CLK_FLAG2 0x2
#define CLK_FLAG3 0x4
#define CLK_FLAG4 0x8
#define CLK_HAVEFLAG1 0x10
#define CLK_HAVEFLAG2 0x20
#define CLK_HAVEFLAG3 0x40
#define CLK_HAVEFLAG4 0x80
/*
* Structure for returning clock status
*/
struct refclockstat {
u_char type;
u_char flags;
u_char haveflags;
u_short lencode; /* ahem, we do have some longer "time-codes" */
char *lastcode;
U_LONG polls;
U_LONG noresponse;
U_LONG badformat;
U_LONG baddata;
U_LONG timereset;
char *clockdesc; /* description of clock, in ASCII */
l_fp fudgetime1;
l_fp fudgetime2;
LONG fudgeval1;
LONG fudgeval2;
u_char currentstatus;
u_char lastevent;
u_char unused;
struct ctl_var *kv_list; /* additional variables */
};
/*
* Reference clock I/O structure. Used to provide an interface between
* the reference clock drivers and the I/O module.
*/
struct refclockio {
struct refclockio *next;
void (*clock_recv)();
caddr_t srcclock; /* pointer to clock structure */
int datalen;
int fd;
U_LONG recvcount;
};
/*
* Sizes of things we return for debugging
*/
#define NCLKBUGVALUES 16
#define NCLKBUGTIMES 32
/*
* Structure for returning debugging info
*/
struct refclockbug {
u_char nvalues;
u_char ntimes;
u_short svalues;
U_LONG stimes;
U_LONG values[NCLKBUGVALUES];
l_fp times[NCLKBUGTIMES];
};
/*
* Struct refclock provides the interface between the reference
* clock support and particular clock drivers. There are entries
* to open and close a unit, optional values to specify the
* timer interval for calls to the transmit procedure and to
* specify a polling routine to be called when the transmit
* procedure executes. There is an entry which is called when
* the transmit routine is about to shift zeroes into the
* filter register, and entries for stuffing fudge factors into
* the driver and getting statistics from it.
*/
struct refclock {
int (*clock_start) P((u_int, struct peer *)); /* start a clock unit */
void (*clock_shutdown) P((int)); /* shut a clock down */
void (*clock_poll) P((int, struct peer *)); /* called from the xmit routine */
void (*clock_control) P((u_int, struct refclockstat *, struct refclockstat *)); /* set fudge values, return stats */
void (*clock_init) P((void)); /* initialize driver data at startup */
void (*clock_buginfo) P((int, struct refclockbug *)); /* get clock dependent bug info */
U_LONG clock_flags; /* flag values */
};
extern int io_addclock_simple P((struct refclockio *));
extern int io_addclock P((struct refclockio *));
extern void io_closeclock P((struct refclockio *));
#ifdef REFCLOCK
extern void refclock_buginfo P((struct sockaddr_in *, struct refclockbug *));
extern void refclock_control P((struct sockaddr_in *, struct refclockstat *, struct refclockstat *));
#endif /* REFCLOCK */
|
