1 /*- 2 * Copyright (c) 1985 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)globals.h 5.1 (Berkeley) 05/11/93 8 */ 9 10 #ifdef sgi 11 #ident "$Revision: 1.15 $" 12 #endif 13 14 #include <sys/param.h> 15 #include <sys/time.h> 16 #include <sys/socket.h> 17 18 #include <netinet/in.h> 19 #include <arpa/inet.h> 20 21 #include <errno.h> 22 #include <limits.h> 23 #include <netdb.h> 24 #include <stdio.h> 25 #include <stdlib.h> 26 #include <string.h> 27 #include <syslog.h> 28 #include <syslog.h> 29 #include <unistd.h> 30 31 #include <protocols/timed.h> 32 #ifdef sgi 33 #include <bstring.h> 34 #include <sys/clock.h> 35 /* use the constant HZ instead of the function CLK_TCK */ 36 #undef CLK_TCK 37 #define CLK_TCK HZ 38 #else 39 #define SECHR (60*60) 40 #define SECDAY (24*SECHR) 41 #endif /* sgi */ 42 43 extern int errno; 44 extern int sock; 45 46 /* Best expected round trip for a measurement. 47 * This is essentially the number of milliseconds per CPU tick (CLK_TCK?). 48 * All delays shorter than this are usually reported as 0. 49 */ 50 #define MIN_ROUND ((1000-1)/CLK_TCK) 51 52 53 #define SAMPLEINTVL 240 /* synch() freq for master in sec */ 54 #define MAXADJ 20 /* max adjtime() correction in sec */ 55 56 #define MAX_TRIM 3000000 /* max drift in nsec/sec, 0.3% */ 57 #define BIG_ADJ (MAX_TRIM/1000*SAMPLEINTVL*2) /* max good adj */ 58 59 #define MINTOUT 360 /* election delays, 6-15 minutes */ 60 #define MAXTOUT 900 61 62 #define BAD_STATUS (-1) 63 #define GOOD 1 64 #define UNREACHABLE 2 65 #define NONSTDTIME 3 66 #define HOSTDOWN 0x7fffffff 67 68 #define OFF 0 69 #define ON 1 70 71 #define MAX_HOPCNT 10 /* max value for tsp_hpcnt */ 72 73 #define LOSTHOST 3 /* forget after this many failures */ 74 75 #define VALID_RANGE (MAXADJ*1000) /* good times in milliseconds */ 76 #define GOOD_RANGE (MIN_ROUND*2) 77 #define VGOOD_RANGE (MIN_ROUND-1) 78 79 80 /* 81 * Global and per-network states. 82 */ 83 #define NOMASTER 0 /* no good master */ 84 #define SLAVE 1 85 #define MASTER 2 86 #define IGNORE 4 87 #define ALL (SLAVE|MASTER|IGNORE) 88 #define SUBMASTER (SLAVE|MASTER) 89 90 #define NHOSTS 1013 /* max of hosts controlled by timed 91 * This must be a prime number. 92 */ 93 struct hosttbl { 94 struct hosttbl *h_bak; /* hash chain */ 95 struct hosttbl *h_fwd; 96 struct hosttbl *l_bak; /* "sequential" list */ 97 struct hosttbl *l_fwd; 98 struct netinfo *ntp; 99 struct sockaddr_in addr; 100 char name[MAXHOSTNAMELEN+1]; 101 u_char head; /* 1=head of hash chain */ 102 u_char good; /* 0=trusted host, for averaging */ 103 u_char noanswer; /* count of failures to answer */ 104 u_char need_set; /* need a SETTIME */ 105 u_short seq; 106 long delta; 107 }; 108 109 /* closed hash table with internal chaining */ 110 extern struct hosttbl hosttbl[NHOSTS+1]; 111 #define self hosttbl[0] 112 #define hostname (self.name) 113 114 115 struct netinfo { 116 struct netinfo *next; 117 struct in_addr net; 118 u_long mask; 119 struct in_addr my_addr; 120 struct sockaddr_in dest_addr; /* broadcast addr or point-point */ 121 long status; 122 struct timeval slvwait; /* delay before sending our time */ 123 int quit_count; /* recent QUITs */ 124 }; 125 126 #include "extern.h" 127 128 #define tvtomsround(tv) ((tv).tv_sec*1000 + ((tv).tv_usec + 500)/1000) 129 130 extern struct netinfo *nettab; 131 extern int status; 132 extern int trace; 133 extern int sock; 134 extern struct sockaddr_in from; 135 extern struct timeval from_when; /* when the last msg arrived */ 136 extern u_short sequence; /* TSP message sequence number */ 137 extern struct netinfo *fromnet, *slavenet; 138 extern FILE *fd; 139 extern long delay1, delay2; 140 extern int nslavenets; /* nets were I could be a slave */ 141 extern int nmasternets; /* nets were I could be a master */ 142 extern int nignorednets; /* ignored nets */ 143 extern int nnets; /* nets I am connected to */ 144 145 146 #define trace_msg(msg) {if (trace) fprintf(fd, msg);} 147 148 #define trace_sendto_err(addr) { \ 149 int st_errno = errno; \ 150 syslog(LOG_ERR, "%s %d: sendto %s: %m", \ 151 __FILE__, __LINE__, inet_ntoa(addr)); \ 152 if (trace) \ 153 fprintf(fd, "%s %d: sendto %s: %d", __FILE__, __LINE__, \ 154 inet_ntoa(addr), st_errno); \ 155 } 156 157 158 # define max(a,b) (a<b ? b : a) 159 # define min(a,b) (a>b ? b : a) 160 # define abs(x) (x>=0 ? x : -(x)) 161