timed.tproj/timed.tproj/globals.h

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * "Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
   7  * Reserved.  This file contains Original Code and/or Modifications of
   8  * Original Code as defined in and that are subject to the Apple Public
   9  * Source License Version 1.0 (the 'License').  You may not use this file
  10  * except in compliance with the License.  Please obtain a copy of the
  11  * License at http://www.apple.com/publicsource and read it before using
  12  * this file.
  13  *
  14  * The Original Code and all software distributed under the License are
  15  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  16  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  19  * License for the specific language governing rights and limitations
  20  * under the License."
  21  *
  22  * @APPLE_LICENSE_HEADER_END@
  23  */
  24 /*-
  25  * Copyright (c) 1985, 1993
  26  *      The Regents of the University of California.  All rights reserved.
  27  *
  28  * Redistribution and use in source and binary forms, with or without
  29  * modification, are permitted provided that the following conditions
  30  * are met:
  31  * 1. Redistributions of source code must retain the above copyright
  32  *    notice, this list of conditions and the following disclaimer.
  33  * 2. Redistributions in binary form must reproduce the above copyright
  34  *    notice, this list of conditions and the following disclaimer in the
  35  *    documentation and/or other materials provided with the distribution.
  36  * 3. All advertising materials mentioning features or use of this software
  37  *    must display the following acknowledgement:
  38  *      This product includes software developed by the University of
  39  *      California, Berkeley and its contributors.
  40  * 4. Neither the name of the University nor the names of its contributors
  41  *    may be used to endorse or promote products derived from this software
  42  *    without specific prior written permission.
  43  *
  44  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  45  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  46  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  47  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  48  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  49  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  50  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  51  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  52  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  53  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  54  * SUCH DAMAGE.
  55  *
  56  *      @(#)globals.h   8.1 (Berkeley) 6/6/93
  57  */
  58
  59 #ifdef sgi
  60 #ident "$Revision: 1.1 $"
  61 #endif
  62
  63 #include <sys/param.h>
  64 #include <sys/time.h>
  65 #include <sys/socket.h>
  66
  67 #include <netinet/in.h>
  68 #include <arpa/inet.h>
  69
  70 #include <errno.h>
  71 #include <limits.h>
  72 #include <netdb.h>
  73 #include <stdio.h>
  74 #include <stdlib.h>
  75 #include <string.h>
  76 #include <syslog.h>
  77 #include <syslog.h>
  78 #include <unistd.h>
  79
  80 #include <protocols/timed.h>
  81 #ifdef sgi
  82 #include <bstring.h>
  83 #include <sys/clock.h>
  84 /* use the constant HZ instead of the function CLK_TCK */
  85 #undef CLK_TCK
  86 #define CLK_TCK HZ
  87 #else
  88 #define SECHR   (60*60)
  89 #define SECDAY  (24*SECHR)
  90 #endif /* sgi */
  91
  92 extern int errno;
  93 extern int sock;
  94
  95 /* Best expected round trip for a measurement.
  96  * This is essentially the number of milliseconds per CPU tick (CLK_TCK?).
  97  * All delays shorter than this are usually reported as 0.
  98  */
  99 #define MIN_ROUND ((1000-1)/CLK_TCK)
 100
 101
 102 #define SAMPLEINTVL     240             /* synch() freq for master in sec */
 103 #define MAXADJ          20              /* max adjtime() correction in sec */
 104
 105 #define MAX_TRIM        3000000         /* max drift in nsec/sec, 0.3% */
 106 #define BIG_ADJ         (MAX_TRIM/1000*SAMPLEINTVL*2)   /* max good adj */
 107
 108 #define MINTOUT         360             /* election delays, 6-15 minutes */
 109 #define MAXTOUT         900
 110
 111 #define BAD_STATUS      (-1)
 112 #define GOOD            1
 113 #define UNREACHABLE     2
 114 #define NONSTDTIME      3
 115 #define HOSTDOWN        0x7fffffff
 116
 117 #define OFF             0
 118 #define ON              1
 119
 120 #define MAX_HOPCNT      10              /* max value for tsp_hpcnt */
 121
 122 #define LOSTHOST        3               /* forget after this many failures */
 123
 124 #define VALID_RANGE (MAXADJ*1000)       /* good times in milliseconds */
 125 #define GOOD_RANGE (MIN_ROUND*2)
 126 #define VGOOD_RANGE (MIN_ROUND-1)
 127
 128
 129 /*
 130  * Global and per-network states.
 131  */
 132 #define NOMASTER        0               /* no good master */
 133 #define SLAVE           1
 134 #define MASTER          2
 135 #define IGNORE          4
 136 #define ALL             (SLAVE|MASTER|IGNORE)
 137 #define SUBMASTER       (SLAVE|MASTER)
 138
 139 #define NHOSTS          1013            /* max of hosts controlled by timed
 140                                          * This must be a prime number.
 141                                          */
 142 struct hosttbl {
 143         struct  hosttbl *h_bak;         /* hash chain */
 144         struct  hosttbl *h_fwd;
 145         struct  hosttbl *l_bak;         /* "sequential" list */
 146         struct  hosttbl *l_fwd;
 147         struct  netinfo *ntp;
 148         struct  sockaddr_in addr;
 149         char    name[MAXHOSTNAMELEN+1];
 150         u_char  head;                   /* 1=head of hash chain */
 151         u_char  good;                   /* 0=trusted host, for averaging */
 152         u_char  noanswer;               /* count of failures to answer */
 153         u_char  need_set;               /* need a SETTIME */
 154         u_short seq;
 155         long    delta;
 156 };
 157
 158 /* closed hash table with internal chaining */
 159 extern struct hosttbl hosttbl[NHOSTS+1];
 160 #define self hosttbl[0]
 161 #define hostname (self.name)
 162
 163
 164 struct netinfo {
 165         struct  netinfo *next;
 166         struct  in_addr net;
 167         u_long  mask;
 168         struct  in_addr my_addr;
 169         struct  sockaddr_in dest_addr;  /* broadcast addr or point-point */
 170         long    status;
 171         struct timeval slvwait;         /* delay before sending our time */
 172         int     quit_count;             /* recent QUITs */
 173 };
 174
 175 #include "extern.h"
 176
 177 #define tvtomsround(tv) ((tv).tv_sec*1000 + ((tv).tv_usec + 500)/1000)
 178
 179 extern struct netinfo *nettab;
 180 extern int status;
 181 extern int trace;
 182 extern int sock;
 183 extern struct sockaddr_in from;
 184 extern struct timeval from_when;        /* when the last msg arrived */
 185 extern u_short sequence;                /* TSP message sequence number */
 186 extern struct netinfo *fromnet, *slavenet;
 187 extern FILE *fd;
 188 extern long delay1, delay2;
 189 extern int nslavenets;                  /* nets were I could be a slave */
 190 extern int nmasternets;                 /* nets were I could be a master */
 191 extern int nignorednets;                /* ignored nets */
 192 extern int nnets;                       /* nets I am connected to */
 193
 194
 195 #define trace_msg(msg)          {if (trace) fprintf(fd, msg);}
 196
 197 #define trace_sendto_err(addr) {                                        \
 198         int st_errno = errno;                                           \
 199         syslog(LOG_ERR, "%s %d: sendto %s: %m",                         \
 200                 __FILE__, __LINE__, inet_ntoa(addr));                   \
 201         if (trace)                                                      \
 202                 fprintf(fd, "%s %d: sendto %s: %d", __FILE__, __LINE__, \
 203                         inet_ntoa(addr), st_errno);                     \
 204 }
 205
 206
 207 # define max(a,b)       (a<b ? b : a)
 208 # define min(a,b)       (a>b ? b : a)
 209 # define abs(x)         (x>=0 ? x : -(x))