| /* dnsmasq is Copyright (c) 2000-2013 Simon Kelley |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; version 2 dated June, 1991, or |
| (at your option) version 3 dated 29 June, 2007. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #define FTABSIZ 150 /* max number of outstanding requests (default) */ |
| #define MAX_PROCS 20 /* max no children for TCP requests */ |
| #define CHILD_LIFETIME 150 /* secs 'till terminated (RFC1035 suggests > 120s) */ |
| #define EDNS_PKTSZ 4096 /* default max EDNS.0 UDP packet from RFC5625 */ |
| #define KEYBLOCK_LEN 140 /* choose to mininise fragmentation when storing DNSSEC keys */ |
| #define TIMEOUT 10 /* drop UDP queries after TIMEOUT seconds */ |
| #define FORWARD_TEST 50 /* try all servers every 50 queries */ |
| #define FORWARD_TIME 20 /* or 20 seconds */ |
| #define RANDOM_SOCKS 64 /* max simultaneous random ports */ |
| #define LEASE_RETRY 60 /* on error, retry writing leasefile after LEASE_RETRY seconds */ |
| #define CACHESIZ 150 /* default cache size */ |
| #define MAXLEASES 1000 /* maximum number of DHCP leases */ |
| #define PING_WAIT 3 /* wait for ping address-in-use test */ |
| #define PING_CACHE_TIME 30 /* Ping test assumed to be valid this long. */ |
| #define DECLINE_BACKOFF 600 /* disable DECLINEd static addresses for this long */ |
| #define DHCP_PACKET_MAX 16384 /* hard limit on DHCP packet size */ |
| #define SMALLDNAME 40 /* most domain names are smaller than this */ |
| #define HOSTSFILE "/etc/hosts" |
| #define ETHERSFILE "/etc/ethers" |
| #define DEFLEASE 3600 /* default lease time, 1 hour */ |
| #define CHUSER "nobody" |
| #define CHGRP "dip" |
| #define TFTP_MAX_CONNECTIONS 50 /* max simultaneous connections */ |
| #define LOG_MAX 5 /* log-queue length */ |
| #define RANDFILE "/dev/urandom" |
| #define DNSMASQ_SERVICE "uk.org.thekelleys.dnsmasq" /* Default - may be overridden by config */ |
| #define DNSMASQ_PATH "/uk/org/thekelleys/dnsmasq" |
| #define AUTH_TTL 600 /* default TTL for auth DNS */ |
| #define SOA_REFRESH 1200 /* SOA refresh default */ |
| #define SOA_RETRY 180 /* SOA retry default */ |
| #define SOA_EXPIRY 1209600 /* SOA expiry default */ |
| |
| /* compile-time options: uncomment below to enable or do eg. |
| make COPTS=-DHAVE_BROKEN_RTC |
| |
| HAVE_BROKEN_RTC |
| define this on embedded systems which don't have an RTC |
| which keeps time over reboots. Causes dnsmasq to use uptime |
| for timing, and keep lease lengths rather than expiry times |
| in its leases file. This also make dnsmasq "flash disk friendly". |
| Normally, dnsmasq tries very hard to keep the on-disk leases file |
| up-to-date: rewriting it after every renewal. When HAVE_BROKEN_RTC |
| is in effect, the lease file is only written when a new lease is |
| created, or an old one destroyed. (Because those are the only times |
| it changes.) This vastly reduces the number of file writes, and makes |
| it viable to keep the lease file on a flash filesystem. |
| NOTE: when enabling or disabling this, be sure to delete any old |
| leases file, otherwise dnsmasq may get very confused. |
| |
| HAVE_TFTP |
| define this to get dnsmasq's built-in TFTP server. |
| |
| HAVE_DHCP |
| define this to get dnsmasq's DHCPv4 server. |
| |
| HAVE_DHCP6 |
| define this to get dnsmasq's DHCPv6 server. (implies HAVE_DHCP). |
| |
| HAVE_SCRIPT |
| define this to get the ability to call scripts on lease-change. |
| |
| HAVE_LUASCRIPT |
| define this to get the ability to call Lua script on lease-change. (implies HAVE_SCRIPT) |
| |
| HAVE_DBUS |
| define this if you want to link against libdbus, and have dnsmasq |
| support some methods to allow (re)configuration of the upstream DNS |
| servers via DBus. |
| |
| HAVE_IDN |
| define this if you want international domain name support. |
| NOTE: for backwards compatibility, IDN support is automatically |
| included when internationalisation support is built, using the |
| *-i18n makefile targets, even if HAVE_IDN is not explicitly set. |
| |
| HAVE_CONNTRACK |
| define this to include code which propogates conntrack marks from |
| incoming DNS queries to the corresponding upstream queries. This adds |
| a build-dependency on libnetfilter_conntrack, but the resulting binary will |
| still run happily on a kernel without conntrack support. |
| |
| HAVE_IPSET |
| define this to include the ability to selectively add resolved ip addresses |
| to given ipsets. |
| |
| HAVE_AUTH |
| define this to include the facility to act as an authoritative DNS |
| server for one or more zones. |
| |
| |
| NO_IPV6 |
| NO_TFTP |
| NO_DHCP |
| NO_DHCP6 |
| NO_SCRIPT |
| NO_LARGEFILE |
| NO_AUTH |
| these are avilable to explictly disable compile time options which would |
| otherwise be enabled automatically (HAVE_IPV6, >2Gb file sizes) or |
| which are enabled by default in the distributed source tree. Building dnsmasq |
| with something like "make COPTS=-DNO_SCRIPT" will do the trick. |
| |
| LEASEFILE |
| CONFFILE |
| RESOLVFILE |
| the default locations of these files are determined below, but may be overridden |
| in a build command line using COPTS. |
| |
| */ |
| |
| |
| /* The default set of options to build. Built with these options, dnsmasq |
| has no library dependencies other than libc */ |
| |
| #define HAVE_DHCP |
| #define HAVE_DHCP6 |
| #define HAVE_TFTP |
| #define HAVE_SCRIPT |
| #define HAVE_AUTH |
| #define HAVE_IPSET |
| /* #define HAVE_LUASCRIPT */ |
| /* #define HAVE_BROKEN_RTC */ |
| /* #define HAVE_DBUS */ |
| /* #define HAVE_IDN */ |
| /* #define HAVE_CONNTRACK */ |
| |
| |
| /* Default locations for important system files. */ |
| |
| #ifndef LEASEFILE |
| # if defined(__FreeBSD__) || defined (__OpenBSD__) || defined(__DragonFly__) || defined(__NetBSD__) |
| # define LEASEFILE "/var/db/dnsmasq.leases" |
| # elif defined(__sun__) || defined (__sun) |
| # define LEASEFILE "/var/cache/dnsmasq.leases" |
| # elif defined(__ANDROID__) |
| # define LEASEFILE "/data/misc/dhcp/dnsmasq.leases" |
| # else |
| # define LEASEFILE "/var/lib/misc/dnsmasq.leases" |
| # endif |
| #endif |
| |
| #ifndef CONFFILE |
| # if defined(__FreeBSD__) |
| # define CONFFILE "/usr/local/etc/dnsmasq.conf" |
| # else |
| # define CONFFILE "/etc/dnsmasq.conf" |
| # endif |
| #endif |
| |
| #ifndef RESOLVFILE |
| # if defined(__uClinux__) |
| # define RESOLVFILE "/etc/config/resolv.conf" |
| # else |
| # define RESOLVFILE "/etc/resolv.conf" |
| # endif |
| #endif |
| |
| #ifndef RUNFILE |
| # if defined(__ANDROID__) |
| # define RUNFILE "/data/dnsmasq.pid" |
| # else |
| # define RUNFILE "/var/run/dnsmasq.pid" |
| # endif |
| #endif |
| |
| /* platform dependent options: these are determined automatically below |
| |
| HAVE_LINUX_NETWORK |
| HAVE_BSD_NETWORK |
| HAVE_SOLARIS_NETWORK |
| define exactly one of these to alter interaction with kernel networking. |
| |
| HAVE_GETOPT_LONG |
| defined when GNU-style getopt_long available. |
| |
| HAVE_SOCKADDR_SA_LEN |
| defined if struct sockaddr has sa_len field (*BSD) |
| */ |
| |
| /* Must preceed __linux__ since uClinux defines __linux__ too. */ |
| #if defined(__uClinux__) |
| #define HAVE_LINUX_NETWORK |
| #define HAVE_GETOPT_LONG |
| #undef HAVE_SOCKADDR_SA_LEN |
| /* Never use fork() on uClinux. Note that this is subtly different from the |
| --keep-in-foreground option, since it also suppresses forking new |
| processes for TCP connections and disables the call-a-script on leasechange |
| system. It's intended for use on MMU-less kernels. */ |
| #define NO_FORK |
| |
| #elif defined(__UCLIBC__) |
| #define HAVE_LINUX_NETWORK |
| #if defined(__UCLIBC_HAS_GNU_GETOPT__) || \ |
| ((__UCLIBC_MAJOR__==0) && (__UCLIBC_MINOR__==9) && (__UCLIBC_SUBLEVEL__<21)) |
| # define HAVE_GETOPT_LONG |
| #endif |
| #undef HAVE_SOCKADDR_SA_LEN |
| #if !defined(__ARCH_HAS_MMU__) && !defined(__UCLIBC_HAS_MMU__) |
| # define NO_FORK |
| #endif |
| #if defined(__UCLIBC_HAS_IPV6__) |
| # ifndef IPV6_V6ONLY |
| # define IPV6_V6ONLY 26 |
| # endif |
| #endif |
| |
| /* This is for glibc 2.x */ |
| #elif defined(__linux__) |
| #define HAVE_LINUX_NETWORK |
| #define HAVE_GETOPT_LONG |
| #undef HAVE_SOCKADDR_SA_LEN |
| |
| #elif defined(__FreeBSD__) || \ |
| defined(__OpenBSD__) || \ |
| defined(__DragonFly__) || \ |
| defined(__FreeBSD_kernel__) |
| #define HAVE_BSD_NETWORK |
| /* Later verions of FreeBSD have getopt_long() */ |
| #if defined(optional_argument) && defined(required_argument) |
| # define HAVE_GETOPT_LONG |
| #endif |
| #define HAVE_SOCKADDR_SA_LEN |
| |
| #elif defined(__APPLE__) |
| #define HAVE_BSD_NETWORK |
| #define HAVE_GETOPT_LONG |
| #define HAVE_SOCKADDR_SA_LEN |
| /* Define before sys/socket.h is included so we get socklen_t */ |
| #define _BSD_SOCKLEN_T_ |
| /* Select the RFC_3542 version of the IPv6 socket API. |
| Define before netinet6/in6.h is included. */ |
| #define __APPLE_USE_RFC_3542 |
| |
| #elif defined(__NetBSD__) |
| #define HAVE_BSD_NETWORK |
| #define HAVE_GETOPT_LONG |
| #define HAVE_SOCKADDR_SA_LEN |
| |
| #elif defined(__sun) || defined(__sun__) |
| #define HAVE_SOLARIS_NETWORK |
| #define HAVE_GETOPT_LONG |
| #undef HAVE_SOCKADDR_SA_LEN |
| #define ETHER_ADDR_LEN 6 |
| |
| #endif |
| |
| /* Decide if we're going to support IPv6 */ |
| /* We assume that systems which don't have IPv6 |
| headers don't have ntop and pton either */ |
| |
| #if defined(INET6_ADDRSTRLEN) && defined(IPV6_V6ONLY) |
| # define HAVE_IPV6 |
| # define ADDRSTRLEN INET6_ADDRSTRLEN |
| #else |
| # if !defined(INET_ADDRSTRLEN) |
| # define INET_ADDRSTRLEN 16 /* 4*3 + 3 dots + NULL */ |
| # endif |
| # undef HAVE_IPV6 |
| # define ADDRSTRLEN INET_ADDRSTRLEN |
| #endif |
| |
| |
| /* rules to implement compile-time option dependencies and |
| the NO_XXX flags */ |
| |
| #ifdef NO_IPV6 |
| #undef HAVE_IPV6 |
| #endif |
| |
| #ifdef NO_TFTP |
| #undef HAVE_TFTP |
| #endif |
| |
| #ifdef NO_DHCP |
| #undef HAVE_DHCP |
| #undef HAVE_DHCP6 |
| #endif |
| |
| #if defined(NO_DHCP6) || !defined(HAVE_IPV6) |
| #undef HAVE_DHCP6 |
| #endif |
| |
| /* DHCP6 needs DHCP too */ |
| #ifdef HAVE_DHCP6 |
| #define HAVE_DHCP |
| #endif |
| |
| #if defined(NO_SCRIPT) || !defined(HAVE_DHCP) || defined(NO_FORK) |
| #undef HAVE_SCRIPT |
| #undef HAVE_LUASCRIPT |
| #endif |
| |
| /* Must HAVE_SCRIPT to HAVE_LUASCRIPT */ |
| #ifdef HAVE_LUASCRIPT |
| #define HAVE_SCRIPT |
| #endif |
| |
| #ifdef NO_AUTH |
| #undef HAVE_AUTH |
| #endif |
| |
| #if defined(NO_IPSET) || !defined(HAVE_LINUX_NETWORK) |
| #undef HAVE_IPSET |
| #endif |
| |
| /* Define a string indicating which options are in use. |
| DNSMASQP_COMPILE_OPTS is only defined in dnsmasq.c */ |
| |
| #ifdef DNSMASQ_COMPILE_OPTS |
| |
| static char *compile_opts = |
| #ifndef HAVE_IPV6 |
| "no-" |
| #endif |
| "IPv6 " |
| #ifndef HAVE_GETOPT_LONG |
| "no-" |
| #endif |
| "GNU-getopt " |
| #ifdef HAVE_BROKEN_RTC |
| "no-RTC " |
| #endif |
| #ifdef NO_FORK |
| "no-MMU " |
| #endif |
| #ifndef HAVE_DBUS |
| "no-" |
| #endif |
| "DBus " |
| #ifndef LOCALEDIR |
| "no-" |
| #endif |
| "i18n " |
| #if !defined(LOCALEDIR) && !defined(HAVE_IDN) |
| "no-" |
| #endif |
| "IDN " |
| #ifndef HAVE_DHCP |
| "no-" |
| #endif |
| "DHCP " |
| #if defined(HAVE_DHCP) |
| # if !defined (HAVE_DHCP6) |
| "no-" |
| # endif |
| "DHCPv6 " |
| # if !defined(HAVE_SCRIPT) |
| "no-scripts " |
| # else |
| # if !defined(HAVE_LUASCRIPT) |
| "no-" |
| # endif |
| "Lua " |
| # endif |
| #endif |
| #ifndef HAVE_TFTP |
| "no-" |
| #endif |
| "TFTP " |
| #ifndef HAVE_CONNTRACK |
| "no-" |
| #endif |
| "conntrack " |
| #ifndef HAVE_IPSET |
| "no-" |
| #endif |
| "ipset " |
| #ifndef HAVE_AUTH |
| "no-" |
| #endif |
| "auth"; |
| |
| #endif |
| |
| |
| |