src/config.h

   1 /* dnsmasq is Copyright (c) 2000 Simon Kelley
   2
   3    This program is free software; you can redistribute it and/or modify
   4    it under the terms of the GNU General Public License as published by
   5    the Free Software Foundation; version 2 dated June, 1991.
   6
   7    This program is distributed in the hope that it will be useful,
   8    but WITHOUT ANY WARRANTY; without even the implied warranty of
   9    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10    GNU General Public License for more details.
  11 */
  12
  13 /* Author's email: simon@thekelleys.org.uk */
  14
  15 #define VERSION "2.0"
  16
  17 #define FTABSIZ 150 /* max number of outstanding requests */
  18 #define TIMEOUT 40 /* drop queries after TIMEOUT seconds */
  19 #define LOGRATE 120 /* log table overflows every LOGRATE seconds */
  20 #define CACHESIZ 150 /* default cache size */
  21 #define SMALLDNAME 40 /* most domain names are smaller than this */
  22 #define CONFFILE "/etc/dnsmasq.conf"
  23 #define HOSTSFILE "/etc/hosts"
  24 #ifdef __uClinux__
  25 #  define RESOLVFILE "/etc/config/resolv.conf"
  26 #else
  27 #  define RESOLVFILE "/etc/resolv.conf"
  28 #endif
  29 #define RUNFILE "/var/run/dnsmasq.pid"
  30 #ifdef __FreeBSD__
  31 #   define LEASEFILE "/var/db/dnsmasq.leases"
  32 #else
  33 #   define LEASEFILE "/var/lib/misc/dnsmasq.leases"
  34 #endif
  35 #define DEFLEASE 3600 /* default lease time, 1 hour */
  36 #define CHUSER "nobody"
  37 #define CHGRP "dip"
  38 #define IP6INTERFACES "/proc/net/if_inet6"
  39 #define DHCP_SERVER_PORT 67
  40 #define DHCP_CLIENT_PORT 68
  41
  42 /* Logfile stuff - change this to change the options and facility */
  43 /* debug is true if the --no-daemon flag is given */
  44 #ifdef LOG_PERROR
  45 #  define DNSMASQ_LOG_OPT(debug)  (debug) ? LOG_PERROR : LOG_PID
  46 #else
  47 #  define DNSMASQ_LOG_OPT(debug)  (debug) ? 0 : LOG_PID
  48 #endif
  49
  50 #ifdef LOG_LOCAL0
  51 #  define DNSMASQ_LOG_FAC(debug)  (debug) ? LOG_LOCAL0 : LOG_DAEMON
  52 #else
  53 #  define DNSMASQ_LOG_FAC(debug)  LOG_DAEMON
  54 #endif
  55
  56
  57 /* Decide if we're going to support IPv6 */
  58 /* We assume that systems which don't have IPv6
  59    headers don't have ntop and pton either */
  60
  61 #if defined(INET6_ADDRSTRLEN)
  62 #  define HAVE_IPV6
  63 #  define ADDRSTRLEN INET6_ADDRSTRLEN
  64 #elif defined(INET_ADDRSTRLEN)
  65 #  undef HAVE_IPV6
  66 #  define ADDRSTRLEN INET_ADDRSTRLEN
  67 #else
  68 #  undef HAVE_IPV6
  69 #  define ADDRSTRLEN 16 /* 4*3 + 3 dots + NULL */
  70 #endif
  71
  72 /* Get linux C library versions. */
  73 #if defined(__linux__) && !defined(__UCLIBC__) && !defined(__uClinux__)
  74 #  include <libio.h>
  75 #endif
  76
  77
  78 /* Follows system specific switches. If you run on a
  79    new system, you may want to edit these.
  80    May replace this with Autoconf one day.
  81
  82
  83 HAVE_LINUX_IPV6_PROC
  84    define this to do IPv6 interface discovery using
  85    proc/net/if_inet6 ala LINUX.
  86
  87 HAVE_GETOPT_LONG
  88    define this if you have GNU libc or GNU getopt.
  89
  90 HAVE_ARC4RANDOM
  91    define this if you have arc4random() to get better security from DNS spoofs
  92    by using really random ids (OpenBSD)
  93
  94 HAVE_RANDOM
  95    define this if you have the 4.2BSD random() function (and its
  96    associated srandom() function), which is at least as good as (if not
  97    better than) the rand() function.
  98
  99 HAVE_DEV_RANDOM
 100    define this if you have the /dev/random device, which gives truly
 101    random numbers but may run out of random numbers.
 102
 103 HAVE_DEV_URANDOM
 104    define this if you have the /dev/urandom device, which gives
 105    semi-random numbers when it runs out of truly random numbers.
 106
 107 HAVE_SOCKADDR_SA_LEN
 108    define this if struct sockaddr has sa_len field (*BSD)
 109
 110 HAVE_PSELECT
 111    If your C library implements pselect, define this.
 112
 113 HAVE_PF_PACKET
 114    If your OS implements packet sockets, define this.
 115
 116 HAVE_BPF
 117    If your OS implements Berkeley PAcket filter, define this.
 118
 119 NOTES:
 120    For Linux you should define
 121       HAVE_LINUX_IPV6_PROC
 122       HAVE_GETOPT_LONG
 123       HAVE_RANDOM
 124       HAVE_DEV_RANDOM
 125       HAVE_DEV_URANDOM
 126       HAVE_PF_PACKET
 127    you should NOT define
 128       HAVE_ARC4RANDOM
 129       HAVE_SOCKADDR_SA_LEN
 130
 131    For *BSD systems you should define
 132      HAVE_SOCKADDR_SA_LEN
 133      HAVE_RANDOM
 134      HAVE_BPF
 135    you should NOT define
 136      HAVE_LINUX_IPV6_PROC
 137    and you MAY define
 138      HAVE_ARC4RANDOM - OpenBSD and FreeBSD
 139      HAVE_DEV_URANDOM - OpenBSD and FreeBSD
 140      HAVE_DEV_RANDOM - FreeBSD (OpenBSD with hardware random number generator)
 141      HAVE_GETOPT_LONG - only if you link GNU getopt.
 142
 143 */
 144
 145 /* Must preceed __linux__ since uClinux defines __linux__ too. */
 146 #if defined(__uClinux__) || defined(__UCLIBC__)
 147 #undef HAVE_LINUX_IPV6_PROC
 148 #define HAVE_GETOPT_LONG
 149 #undef HAVE_ARC4RANDOM
 150 #define HAVE_RANDOM
 151 #define HAVE_DEV_URANDOM
 152 #define HAVE_DEV_RANDOM
 153 #define HAVE_PF_PACKET
 154 #undef HAVE_SOCKADDR_SA_LEN
 155 #undef HAVE_PSELECT
 156 /* Don't fork into background on uClinux */
 157 #if defined(__uClinux__)
 158 #  define NO_FORK
 159 #endif
 160
 161 /* libc5 - must precede __linux__ too */
 162 /* Note to build a libc5 binary on a modern Debian system:
 163    install the packages altgcc libc5 and libc5-altdev
 164    then run "make CC=i486-linuxlibc1-gcc" */
 165 /* Note that compling dnsmasq 2.x under libc5 and kernel 2.0.x
 166    is probably doomed - no packet socket for starters. */
 167 #elif defined(__linux__) && \
 168       defined(_LINUX_C_LIB_VERSION_MAJOR) && \
 169       (_LINUX_C_LIB_VERSION_MAJOR == 5 )
 170 #undef HAVE_IPV6
 171 #undef HAVE_LINUX_IPV6_PROC
 172 #define HAVE_GETOPT_LONG
 173 #undef HAVE_ARC4RANDOM
 174 #define HAVE_RANDOM
 175 #define HAVE_DEV_URANDOM
 176 #define HAVE_DEV_RANDOM
 177 #undef HAVE_PF_PACKET
 178 #undef HAVE_SOCKADDR_SA_LEN
 179 #undef HAVE_PSELECT
 180 /* Fix various misfeatures of libc5 headers */
 181 #define T_SRV 33
 182 typedef unsigned long in_addr_t;
 183 typedef size_t socklen_t;
 184
 185 /* This is for glibc 2.x */
 186 #elif defined(__linux__)
 187 #define HAVE_LINUX_IPV6_PROC
 188 #define HAVE_GETOPT_LONG
 189 #undef HAVE_ARC4RANDOM
 190 #define HAVE_RANDOM
 191 #define HAVE_DEV_URANDOM
 192 #define HAVE_DEV_RANDOM
 193 #undef HAVE_SOCKADDR_SA_LEN
 194 #define HAVE_PSELECT
 195 #define HAVE_PF_PACKET
 196 /* glibc < 2.2  has broken Sockaddr_in6 so we have to use our own. */
 197 /* glibc < 2.2 doesn't define in_addr_t */
 198 #if defined(__GLIBC__) && (__GLIBC__ == 2) && \
 199     defined(__GLIBC_MINOR__) && (__GLIBC_MINOR__ < 2)
 200 typedef unsigned long in_addr_t;
 201 #if defined(HAVE_IPV6)
 202 #   define HAVE_BROKEN_SOCKADDR_IN6
 203 #endif
 204 #endif
 205
 206 #elif defined(__FreeBSD__) || defined(__OpenBSD__)
 207 #undef HAVE_LINUX_IPV6_PROC
 208 #undef HAVE_GETOPT_LONG
 209 #define HAVE_ARC4RANDOM
 210 #define HAVE_RANDOM
 211 #define HAVE_DEV_URANDOM
 212 #define HAVE_SOCKADDR_SA_LEN
 213 #undef HAVE_PSELECT
 214 #define HAVE_BPF
 215
 216 #elif defined(__APPLE__)
 217 #undef HAVE_LINUX_IPV6_PROC
 218 #undef HAVE_GETOPT_LONG
 219 #define HAVE_ARC4RANDOM
 220 #define HAVE_RANDOM
 221 #define HAVE_DEV_URANDOM
 222 #define HAVE_SOCKADDR_SA_LEN
 223 #undef HAVE_PSELECT
 224 #define HAVE_BPF
 225 /* Define before sys/socket.h is included so we get socklen_t */
 226 #define _BSD_SOCKLEN_T_
 227 /* The two below are not defined in Mac OS X arpa/nameserv.h */
 228 #define IN6ADDRSZ 16
 229 #define T_SRV 33
 230
 231 #elif defined(__NetBSD__)
 232 #undef HAVE_LINUX_IPV6_PROC
 233 #undef HAVE_GETOPT_LONG
 234 #undef HAVE_ARC4RANDOM
 235 #define HAVE_RANDOM
 236 #undef HAVE_DEV_URANDOM
 237 #undef HAVE_DEV_RANDOM
 238 #define HAVE_SOCKADDR_SA_LEN
 239 #undef HAVE_PSELECT
 240 #define HAVE_BPF
 241
 242 /* env "LIBS=-lsocket -lnsl" make */
 243 #elif defined(__sun) || defined(__sun__)
 244 #undef HAVE_LINUX_IPV6_PROC
 245 #undef HAVE_GETOPT_LONG
 246 #undef HAVE_ARC4RANDOM
 247 #define HAVE_RANDOM
 248 #undef HAVE_DEV_URANDOM
 249 #undef HAVE_DEV_RANDOM
 250 #undef HAVE_SOCKADDR_SA_LEN
 251 #undef HAVE_PSELECT
 252 #define HAVE_BPF
 253 #endif
 254
 255
 256