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29 * @(#)globals.h 8.1 (Berkeley) 6/6/93
33 #include <sys/param.h>
35 #include <sys/socket.h>
37 #include <netinet/in.h>
38 #include <arpa/inet.h>
51 #include <protocols/timed.h>
53 #define SECDAY (24*SECHR)
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.
59 #define MIN_ROUND ((1000-1)/CLK_TCK)
62 #define SAMPLEINTVL 240 /* synch() freq for master in sec */
63 #define MAXADJ 20 /* max adjtime() correction in sec */
65 #define MAX_TRIM 3000000 /* max drift in nsec/sec, 0.3% */
66 #define BIG_ADJ (MAX_TRIM/1000*SAMPLEINTVL*2) /* max good adj */
68 #define MINTOUT 360 /* election delays, 6-15 minutes */
71 #define BAD_STATUS (-1)
75 #define HOSTDOWN 0x7fffffff
80 #define MAX_HOPCNT 10 /* max value for tsp_hpcnt */
82 #define LOSTHOST 3 /* forget after this many failures */
84 #define VALID_RANGE (MAXADJ*1000) /* good times in milliseconds */
85 #define GOOD_RANGE (MIN_ROUND*2)
86 #define VGOOD_RANGE (MIN_ROUND-1)
90 * Global and per-network states.
92 #define NOMASTER 0 /* no good master */
96 #define ALL (SLAVE|MASTER|IGNORE)
97 #define SUBMASTER (SLAVE|MASTER)
99 #define NHOSTS 1013 /* max of hosts controlled by timed
100 * This must be a prime number.
103 struct hosttbl *h_bak; /* hash chain */
104 struct hosttbl *h_fwd;
105 struct hosttbl *l_bak; /* "sequential" list */
106 struct hosttbl *l_fwd;
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 */
118 /* closed hash table with internal chaining */
119 extern struct hosttbl hosttbl[NHOSTS+1];
120 #define self hosttbl[0]
121 #define hostname (self.name)
125 struct netinfo *next;
128 struct in_addr my_addr;
129 struct sockaddr_in dest_addr; /* broadcast addr or point-point */
131 struct timeval slvwait; /* delay before sending our time */
132 int quit_count; /* recent QUITs */
137 #define tvtomsround(tv) ((tv).tv_sec*1000 + ((tv).tv_usec + 500)/1000)
139 extern struct netinfo *nettab;
143 extern struct sockaddr_in from;
144 extern struct timeval from_when; /* when the last msg arrived */
145 extern u_short sequence; /* TSP message sequence number */
146 extern struct netinfo *fromnet, *slavenet;
148 extern long delay1, delay2;
149 extern int nslavenets; /* nets were I could be a slave */
150 extern int nmasternets; /* nets were I could be a master */
151 extern int nignorednets; /* ignored nets */
152 extern int nnets; /* nets I am connected to */
155 #define trace_msg(msg) {if (trace) fprintf(fd, msg);}
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)); \
162 fprintf(fd, "%s %d: sendto %s: %d", __FILE__, __LINE__, \
163 inet_ntoa(addr), st_errno); \
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))