/* dnsmasq is Copyright (c) 2000-2009 Simon Kelley
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 dated June, 1991, or
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(at your option) version 3 dated 29 June, 2007.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#define VERSION "2.51"
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#define FTABSIZ 150 /* max number of outstanding requests (default) */
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#define MAX_PROCS 20 /* max no children for TCP requests */
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#define CHILD_LIFETIME 150 /* secs 'till terminated (RFC1035 suggests > 120s) */
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#define EDNS_PKTSZ 1280 /* default max EDNS.0 UDP packet from RFC2671 */
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#define TIMEOUT 10 /* drop UDP queries after TIMEOUT seconds */
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#define FORWARD_TEST 50 /* try all servers every 50 queries */
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#define FORWARD_TIME 10 /* or 10 seconds */
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#define RANDOM_SOCKS 64 /* max simultaneous random ports */
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#define LEASE_RETRY 60 /* on error, retry writing leasefile after LEASE_RETRY seconds */
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#define CACHESIZ 150 /* default cache size */
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#define MAXLEASES 150 /* maximum number of DHCP leases */
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#define PING_WAIT 3 /* wait for ping address-in-use test */
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#define PING_CACHE_TIME 30 /* Ping test assumed to be valid this long. */
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#define DECLINE_BACKOFF 600 /* disable DECLINEd static addresses for this long */
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#define DHCP_PACKET_MAX 16384 /* hard limit on DHCP packet size */
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#define SMALLDNAME 40 /* most domain names are smaller than this */
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#define HOSTSFILE "/etc/hosts"
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#ifdef __uClinux__
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#define RESOLVFILE "/etc/config/resolv.conf"
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#else
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#define RESOLVFILE "/etc/resolv.conf"
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#endif
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#define RUNFILE "/var/run/dnsmasq.pid"
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#ifndef LEASEFILE
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#if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__NetBSD__)
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#define LEASEFILE "/var/db/dnsmasq.leases"
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#elif defined(__sun__) || defined(__sun)
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#define LEASEFILE "/var/cache/dnsmasq.leases"
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#elif defined(__ANDROID__)
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#define LEASEFILE "/data/misc/dhcp/dnsmasq.leases"
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#else
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#define LEASEFILE "/var/lib/misc/dnsmasq.leases"
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#endif
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#endif
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#ifndef CONFFILE
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#if defined(__FreeBSD__)
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#define CONFFILE "/usr/local/etc/dnsmasq.conf"
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#else
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#define CONFFILE "/etc/dnsmasq.conf"
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#endif
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#endif
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#define DEFLEASE 3600 /* default lease time, 1 hour */
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#define CHUSER "nobody"
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#define CHGRP "dip"
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#define DHCP_SERVER_PORT 67
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#define DHCP_CLIENT_PORT 68
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#define DHCP_SERVER_ALTPORT 1067
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#define DHCP_CLIENT_ALTPORT 1068
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#define LOG_MAX 5 /* log-queue length */
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#define RANDFILE "/dev/urandom"
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#define DAD_WAIT 20 /* retry binding IPv6 sockets for this long */
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/* A small collection of RR-types which are missing on some platforms */
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#ifndef T_SIG
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#define T_SIG 24
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#endif
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#ifndef T_SRV
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#define T_SRV 33
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#endif
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#ifndef T_OPT
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#define T_OPT 41
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#endif
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#ifndef T_TKEY
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#define T_TKEY 249
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#endif
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#ifndef T_TSIG
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#define T_TSIG 250
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#endif
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/* Follows system specific switches. If you run on a
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new system, you may want to edit these.
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May replace this with Autoconf one day.
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HAVE_LINUX_NETWORK
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HAVE_BSD_NETWORK
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HAVE_SOLARIS_NETWORK
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define exactly one of these to alter interaction with kernel networking.
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HAVE_BROKEN_RTC
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define this on embedded systems which don't have an RTC
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which keeps time over reboots. Causes dnsmasq to use uptime
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for timing, and keep lease lengths rather than expiry times
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in its leases file. This also make dnsmasq "flash disk friendly".
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Normally, dnsmasq tries very hard to keep the on-disk leases file
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up-to-date: rewriting it after every renewal. When HAVE_BROKEN_RTC
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is in effect, the lease file is only written when a new lease is
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created, or an old one destroyed. (Because those are the only times
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it changes.) This vastly reduces the number of file writes, and makes
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it viable to keep the lease file on a flash filesystem.
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NOTE: when enabling or disabling this, be sure to delete any old
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leases file, otherwise dnsmasq may get very confused.
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HAVE_DHCP
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define this to get dnsmasq's DHCP server.
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HAVE_SCRIPT
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define this to get the ability to call scripts on lease-change
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HAVE_GETOPT_LONG
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define this if you have GNU libc or GNU getopt.
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HAVE_ARC4RANDOM
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define this if you have arc4random() to get better security from DNS spoofs
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by using really random ids (OpenBSD)
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HAVE_SOCKADDR_SA_LEN
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define this if struct sockaddr has sa_len field (*BSD)
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NOTES:
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For Linux you should define
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HAVE_LINUX_NETWORK
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HAVE_GETOPT_LONG
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you should NOT define
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HAVE_ARC4RANDOM
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HAVE_SOCKADDR_SA_LEN
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For *BSD systems you should define
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HAVE_BSD_NETWORK
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HAVE_SOCKADDR_SA_LEN
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and you MAY define
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HAVE_ARC4RANDOM - OpenBSD and FreeBSD and NetBSD version 2.0 or later
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HAVE_GETOPT_LONG - NetBSD, later FreeBSD
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(FreeBSD and OpenBSD only if you link GNU getopt)
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*/
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/* platform independent options- uncomment to enable */
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#define HAVE_DHCP
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#define HAVE_SCRIPT
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/* #define HAVE_BROKEN_RTC */
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/* Allow DHCP to be disabled with COPTS=-DNO_DHCP */
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#ifdef NO_DHCP
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#undef HAVE_DHCP
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#endif
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/* Allow scripts to be disabled with COPTS=-DNO_SCRIPT */
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#ifdef NO_SCRIPT
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#undef HAVE_SCRIPT
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#endif
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/* platform dependent options. */
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/* Must preceed __linux__ since uClinux defines __linux__ too. */
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#if defined(__uClinux__)
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#define HAVE_LINUX_NETWORK
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#define HAVE_GETOPT_LONG
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#undef HAVE_ARC4RANDOM
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#undef HAVE_SOCKADDR_SA_LEN
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/* Never use fork() on uClinux. Note that this is subtly different from the
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--keep-in-foreground option, since it also suppresses forking new
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processes for TCP connections and disables the call-a-script on leasechange
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system. It's intended for use on MMU-less kernels. */
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#define NO_FORK
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#elif defined(__UCLIBC__)
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#define HAVE_LINUX_NETWORK
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#if defined(__UCLIBC_HAS_GNU_GETOPT__) || \
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((__UCLIBC_MAJOR__ == 0) && (__UCLIBC_MINOR__ == 9) && (__UCLIBC_SUBLEVEL__ < 21))
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#define HAVE_GETOPT_LONG
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#endif
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#undef HAVE_ARC4RANDOM
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#undef HAVE_SOCKADDR_SA_LEN
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#if !defined(__ARCH_HAS_MMU__) && !defined(__UCLIBC_HAS_MMU__)
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#define NO_FORK
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#endif
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#if defined(__UCLIBC_HAS_IPV6__)
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#ifndef IPV6_V6ONLY
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#define IPV6_V6ONLY 26
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#endif
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#endif
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/* This is for glibc 2.x */
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#elif defined(__linux__)
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#define HAVE_LINUX_NETWORK
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#define HAVE_GETOPT_LONG
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#undef HAVE_ARC4RANDOM
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#undef HAVE_SOCKADDR_SA_LEN
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#elif defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) || \
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defined(__FreeBSD_kernel__)
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#define HAVE_BSD_NETWORK
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/* Later verions of FreeBSD have getopt_long() */
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#if defined(optional_argument) && defined(required_argument)
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#define HAVE_GETOPT_LONG
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#endif
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#if !defined(__FreeBSD_kernel__)
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#define HAVE_ARC4RANDOM
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#endif
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#define HAVE_SOCKADDR_SA_LEN
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#elif defined(__APPLE__)
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#define HAVE_BSD_NETWORK
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#undef HAVE_GETOPT_LONG
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#define HAVE_ARC4RANDOM
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#define HAVE_SOCKADDR_SA_LEN
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/* Define before sys/socket.h is included so we get socklen_t */
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#define _BSD_SOCKLEN_T_
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#elif defined(__NetBSD__)
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#define HAVE_BSD_NETWORK
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#define HAVE_GETOPT_LONG
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#undef HAVE_ARC4RANDOM
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#define HAVE_SOCKADDR_SA_LEN
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#elif defined(__sun) || defined(__sun__)
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#define HAVE_SOLARIS_NETWORK
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#define HAVE_GETOPT_LONG
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#undef HAVE_ARC4RANDOM
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#undef HAVE_SOCKADDR_SA_LEN
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#define _XPG4_2
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#define __EXTENSIONS__
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#define ETHER_ADDR_LEN 6
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#endif
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/* Decide if we're going to support IPv6 */
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/* IPv6 can be forced off with "make COPTS=-DNO_IPV6" */
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/* We assume that systems which don't have IPv6
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headers don't have ntop and pton either */
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#if defined(INET6_ADDRSTRLEN) && defined(IPV6_V6ONLY) && !defined(NO_IPV6)
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#define HAVE_IPV6
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#define ADDRSTRLEN INET6_ADDRSTRLEN
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#if defined(SOL_IPV6)
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#define IPV6_LEVEL SOL_IPV6
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#else
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#define IPV6_LEVEL IPPROTO_IPV6
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#endif
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#elif defined(INET_ADDRSTRLEN)
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#undef HAVE_IPV6
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#define ADDRSTRLEN INET_ADDRSTRLEN
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#else
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#undef HAVE_IPV6
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#define ADDRSTRLEN 16 /* 4*3 + 3 dots + NULL */
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#endif
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/* Can't do scripts without fork */
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#ifdef NOFORK
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#undef HAVE_SCRIPT
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#endif
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