text: /*-
   * Copyright (c) 1985, 1993
   *	The Regents of the University of California.  All rights reserved.
   *
   * %sccs.include.redist.c%
   *
   *	@(#)globals.h	8.1 (Berkeley) 06/06/93
   */
  
  #ifdef sgi
  #ident "$Revision: 1.15 $"
  #endif
  
  #include <sys/param.h>
  #include <sys/time.h>
  #include <sys/socket.h>
  
  #include <netinet/in.h>
  #include <arpa/inet.h>
  
  #include <errno.h>
  #include <limits.h>
  #include <netdb.h>
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  #include <syslog.h>
  #include <syslog.h>
  #include <unistd.h>
  
  #include <protocols/timed.h>
  #ifdef sgi
  #include <bstring.h>
  #include <sys/clock.h>
  /* use the constant HZ instead of the function CLK_TCK */
  #undef CLK_TCK
  #define CLK_TCK HZ
  #else
  #define	SECHR	(60*60)
  #define	SECDAY	(24*SECHR)
  #endif /* sgi */
  
  extern int errno;
  extern int sock;
  
  /* Best expected round trip for a measurement.
   * This is essentially the number of milliseconds per CPU tick (CLK_TCK?).
   * All delays shorter than this are usually reported as 0.
   */
  #define MIN_ROUND ((1000-1)/CLK_TCK)
  
  
  #define SAMPLEINTVL	240		/* synch() freq for master in sec */
  #define	MAXADJ		20		/* max adjtime() correction in sec */
  
  #define MAX_TRIM	3000000		/* max drift in nsec/sec, 0.3% */
  #define BIG_ADJ		(MAX_TRIM/1000*SAMPLEINTVL*2)	/* max good adj */
  
  #define MINTOUT		360		/* election delays, 6-15 minutes */
  #define MAXTOUT		900
  
  #define BAD_STATUS	(-1)
  #define GOOD		1
  #define UNREACHABLE	2
  #define NONSTDTIME	3
  #define HOSTDOWN	0x7fffffff
  
  #define OFF		0
  #define ON		1
  
  #define MAX_HOPCNT	10		/* max value for tsp_hpcnt */
  
  #define LOSTHOST	3		/* forget after this many failures */
  
  #define VALID_RANGE (MAXADJ*1000)	/* good times in milliseconds */
  #define GOOD_RANGE (MIN_ROUND*2)
  #define VGOOD_RANGE (MIN_ROUND-1)
  
  
  /*
   * Global and per-network states.
   */
  #define NOMASTER	0		/* no good master */
  #define SLAVE		1
  #define MASTER		2
  #define IGNORE		4
  #define ALL		(SLAVE|MASTER|IGNORE)
  #define SUBMASTER	(SLAVE|MASTER)
  
  #define NHOSTS		1013		/* max of hosts controlled by timed
  					 * This must be a prime number.
  					 */
  struct hosttbl {
  	struct	hosttbl *h_bak;		/* hash chain */
  	struct	hosttbl *h_fwd;
  	struct  hosttbl *l_bak;		/* "sequential" list */
  	struct  hosttbl *l_fwd;
  	struct	netinfo *ntp;
  	struct	sockaddr_in addr;
  	char	name[MAXHOSTNAMELEN+1];
  	u_char	head;			/* 1=head of hash chain */
  	u_char	good;			/* 0=trusted host, for averaging */
  	u_char	noanswer;		/* count of failures to answer */
  	u_char	need_set;		/* need a SETTIME */
  	u_short seq;
  	long	delta;
  };
  
  /* closed hash table with internal chaining */
  extern struct hosttbl hosttbl[NHOSTS+1];
  #define self hosttbl[0]
  #define hostname (self.name)
  
  
  struct netinfo {
  	struct	netinfo *next;
  	struct	in_addr net;
  	u_long	mask;
  	struct	in_addr my_addr;
  	struct	sockaddr_in dest_addr;	/* broadcast addr or point-point */
  	long	status;
  	struct timeval slvwait;		/* delay before sending our time */
  	int	quit_count;		/* recent QUITs */
  };
  
  #include "extern.h"
  
  #define tvtomsround(tv) ((tv).tv_sec*1000 + ((tv).tv_usec + 500)/1000)
  
  extern struct netinfo *nettab;
  extern int status;
  extern int trace;
  extern int sock;
  extern struct sockaddr_in from;
  extern struct timeval from_when;	/* when the last msg arrived */
  extern u_short sequence;		/* TSP message sequence number */
  extern struct netinfo *fromnet, *slavenet;
  extern FILE *fd;
  extern long delay1, delay2;
  extern int nslavenets;			/* nets were I could be a slave */
  extern int nmasternets;			/* nets were I could be a master */
  extern int nignorednets;		/* ignored nets */
  extern int nnets;			/* nets I am connected to */
  
  
  #define trace_msg(msg)		{if (trace) fprintf(fd, msg);}
  
  #define trace_sendto_err(addr) {					\
  	int st_errno = errno;						\
  	syslog(LOG_ERR, "%s %d: sendto %s: %m",				\
  		__FILE__, __LINE__, inet_ntoa(addr));			\
  	if (trace)							\
  		fprintf(fd, "%s %d: sendto %s: %d", __FILE__, __LINE__,	\
  			inet_ntoa(addr), st_errno);			\
  }
  
  
  # define max(a,b) 	(a<b ? b : a)
  # define min(a,b) 	(a>b ? b : a)
  # define abs(x)		(x>=0 ? x : -(x))
  