globals.h

<B>Digital的Unix操作系统VAX 4.2源码</B>

/*	@(#)globals.h	4.1	(ULTRIX)	7/2/90	*/

/************************************************************************
 *									*
 *			Copyright (c) 1984-1988 by			*
 *		Digital Equipment Corporation, Maynard, MA		*
 *			All rights reserved.				*
 *									*
 *   This software is furnished under a license and may be used and	*
 *   copied  only  in accordance with the terms of such license and	*
 *   with the  inclusion  of  the  above  copyright  notice.   This	*
 *   software  or  any  other copies thereof may not be provided or	*
 *   otherwise made available to any other person.  No title to and	*
 *   ownership of the software is hereby transferred.			*
 *									*
 *   This software is  derived  from  software  received  from  the	*
 *   University    of   California,   Berkeley,   and   from   Bell	*
 *   Laboratories.  Use, duplication, or disclosure is  subject  to	*
 *   restrictions  under  license  agreements  with  University  of	*
 *   California and with AT&T.						*
 *									*
 *   The information in this software is subject to change  without	*
 *   notice  and should not be construed as a commitment by Digital	*
 *   Equipment Corporation.						*
 *									*
 *   Digital assumes no responsibility for the use  or  reliability	*
 *   of its software on equipment which is not supplied by Digital.	*
 *									*
 ************************************************************************/
/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 */

/*	@(#)globals.h	2.4	(Berkeley)	5/27/86	*/

#include <sys/param.h>
#include <stdio.h>
#include <sys/time.h>
#include <errno.h>
#include <syslog.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <arpa/inet.h>

extern int errno;
extern int sock;

#define SAMPLEINTVL	240		/* synch() freq for master, sec */
#define	MAXADJ		20		/* max correction (sec) for adjtime */
/*
 * Parameters for network time measurement
 * of each host using ICMP timestamp requests.
 */
#define RANGE		20		/* best expected round-trip time, ms */
#define MSGS 		5		/* # of timestamp replies to average */
#define TRIALS		10		/* max # of timestamp echos sent */

#define MINTOUT		360
#define MAXTOUT		900

#define GOOD		1
#define UNREACHABLE	2
#define NONSTDTIME	3
#define HOSTDOWN 	0x7fffffff

#define OFF	0
#define ON	1

/*
 * Global and per-network states.
 */
#define NOMASTER 	0		/* no master on any network */
#define SLAVE 		1
#define MASTER		2
#define IGNORE		4
#define ALL		(SLAVE|MASTER|IGNORE)
#define SUBMASTER	(SLAVE|MASTER)

#define NHOSTS		100	/* max number of hosts controlled by timed */

struct host {
	char *name;
	struct sockaddr_in addr;
	long delta;
	u_short seq;
};

struct netinfo {
	struct netinfo *next;
	u_long net;
	u_long mask;
	struct in_addr my_addr;
	struct sockaddr_in dest_addr;	/* broadcast addr or point-point */
	long status;
};

extern struct netinfo *nettab;
extern int status;
extern int trace;
extern int sock;
extern struct sockaddr_in from;
extern struct netinfo *fromnet, *slavenet;
extern FILE *fd;
extern char hostname[];
extern char tracefile[];
extern struct host hp[];
extern int backoff;
extern long delay1, delay2;
extern int slvcount;
extern int nslavenets;		/* Number of nets were I could be a slave */
extern int nmasternets;		/* Number of nets were I could be a master */
extern int nignorednets;	/* Number of ignored nets */
extern int nnets;		/* Number of nets I am connected to */
extern int External_source;     /* Machine has an external clock source -
                                 * do not set or adjust time
                                 */

char *strcpy(), *malloc();