1/*-
2 * Copyright (c) 1985, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 *	@(#)globals.h	8.1 (Berkeley) 6/6/93
30 *	$FreeBSD: releng/10.3/usr.sbin/timed/timed/globals.h 228720 2011-12-19 20:33:53Z dim $
31 */
32
33#include <sys/param.h>
34#include <sys/time.h>
35#include <sys/socket.h>
36
37#include <netinet/in.h>
38#include <arpa/inet.h>
39
40#include <err.h>
41#include <errno.h>
42#include <limits.h>
43#include <netdb.h>
44#include <stdint.h>
45#include <stdio.h>
46#include <stdlib.h>
47#include <string.h>
48#include <syslog.h>
49#include <unistd.h>
50
51#include <protocols/timed.h>
52#define	SECHR	(60*60)
53#define	SECDAY	(24*SECHR)
54
55/* Best expected round trip for a measurement.
56 * This is essentially the number of milliseconds per CPU tick (CLK_TCK?).
57 * All delays shorter than this are usually reported as 0.
58 */
59#define MIN_ROUND ((1000-1)/CLK_TCK)
60
61
62#define SAMPLEINTVL	240		/* synch() freq for master in sec */
63#define	MAXADJ		20		/* max adjtime() correction in sec */
64
65#define MAX_TRIM	3000000		/* max drift in nsec/sec, 0.3% */
66#define BIG_ADJ		(MAX_TRIM/1000*SAMPLEINTVL*2)	/* max good adj */
67
68#define MINTOUT		360		/* election delays, 6-15 minutes */
69#define MAXTOUT		900
70
71#define BAD_STATUS	(-1)
72#define GOOD		1
73#define UNREACHABLE	2
74#define NONSTDTIME	3
75#define HOSTDOWN	0x7fffffff
76
77#define OFF		0
78#define ON		1
79
80#define MAX_HOPCNT	10		/* max value for tsp_hpcnt */
81
82#define LOSTHOST	3		/* forget after this many failures */
83
84#define VALID_RANGE (MAXADJ*1000)	/* good times in milliseconds */
85#define GOOD_RANGE (MIN_ROUND*2)
86#define VGOOD_RANGE (MIN_ROUND-1)
87
88
89/*
90 * Global and per-network states.
91 */
92#define NOMASTER	0		/* no good master */
93#define SLAVE		1
94#define MASTER		2
95#define IGNORE		4
96#define ALL		(SLAVE|MASTER|IGNORE)
97#define SUBMASTER	(SLAVE|MASTER)
98
99#define NHOSTS		1013		/* max of hosts controlled by timed
100					 * This must be a prime number.
101					 */
102struct hosttbl {
103	struct	hosttbl *h_bak;		/* hash chain */
104	struct	hosttbl *h_fwd;
105	struct  hosttbl *l_bak;		/* "sequential" list */
106	struct  hosttbl *l_fwd;
107	struct	netinfo *ntp;
108	struct	sockaddr_in addr;
109	char	name[MAXHOSTNAMELEN];
110	u_char	head;			/* 1=head of hash chain */
111	u_char	good;			/* 0=trusted host, for averaging */
112	u_char	noanswer;		/* count of failures to answer */
113	u_char	need_set;		/* need a SETTIME */
114	u_short seq;
115	long	delta;
116};
117
118/* closed hash table with internal chaining */
119extern struct hosttbl hosttbl[NHOSTS+1];
120#define self hosttbl[0]
121#define hostname (self.name)
122
123
124struct netinfo {
125	struct	netinfo *next;
126	struct	in_addr net;
127	u_int32_t	mask;
128	struct	in_addr my_addr;
129	struct	sockaddr_in dest_addr;	/* broadcast addr or point-point */
130	long	status;
131	struct timeval slvwait;		/* delay before sending our time */
132	int	quit_count;		/* recent QUITs */
133};
134
135#include "extern.h"
136
137#define tvtomsround(tv) ((tv).tv_sec*1000 + ((tv).tv_usec + 500)/1000)
138
139extern struct netinfo *nettab;
140extern int status;
141extern int trace;
142extern int sock;
143extern struct sockaddr_in from;
144extern struct timeval from_when;	/* when the last msg arrived */
145extern u_short sequence;		/* TSP message sequence number */
146extern struct netinfo *fromnet, *slavenet;
147extern FILE *fd;
148extern long delay1, delay2;
149extern int nslavenets;			/* nets were I could be a slave */
150extern int nmasternets;			/* nets were I could be a master */
151extern int nignorednets;		/* ignored nets */
152extern int nnets;			/* nets I am connected to */
153
154
155#define trace_msg(msg)		{if (trace) fprintf(fd, msg);}
156
157#define trace_sendto_err(addr) {					\
158	int st_errno = errno;						\
159	syslog(LOG_ERR, "%s %d: sendto %s: %m",				\
160		__FILE__, __LINE__, inet_ntoa(addr));			\
161	if (trace)							\
162		fprintf(fd, "%s %d: sendto %s: %d", __FILE__, __LINE__,	\
163			inet_ntoa(addr), st_errno);			\
164}
165
166
167# define max(a,b) 	(a<b ? b : a)
168# define min(a,b) 	(a>b ? b : a)
169# define abs(x)		(x>=0 ? x : -(x))
170