/* * Copyright 2014 Garrett D'Amore * * Copyright 2009 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. * * Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T * All Rights Reserved * * Portions of this source code were derived from Berkeley * 4.3 BSD under license from the regents of the University of * California. */ /* * BIND 4.9.4: */ /* * Portions Copyright (c) 1993 by Digital Equipment Corporation. * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies, and that * the name of Digital Equipment Corporation not be used in advertising or * publicity pertaining to distribution of the document or software without * specific, written prior permission. * * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS * SOFTWARE. * --Copyright-- * * End BIND 4.9.4 */ /* * Copyright (c) 1983, 1987, 1989 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* * Portions Copyright (c) 1996-1999 by Internet Software Consortium. * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS * SOFTWARE. */ /* * @(#)resolv.h 8.1 (Berkeley) 6/2/93 * $Id: resolv.h,v 8.52 2003/04/29 02:27:03 marka Exp $ */ #ifndef _RESOLV_H_ #define _RESOLV_H_ #include #include #include #include #ifdef __cplusplus extern "C" { #endif /* * Revision information. This is the release date in YYYYMMDD format. * It can change every day so the right thing to do with it is use it * in preprocessor commands such as "#if (__RES > 19931104)". Do not * compare for equality; rather, use it to determine whether your resolver * is new enough to contain a certain feature. */ #define __RES 20090302 #define RES_SET_H_ERRNO(r, x) __h_errno_set(r, x) struct __res_state; /* forward */ void __h_errno_set(struct __res_state *res, int err); /* * Resolver configuration file. * Normally not present, but may contain the address of the * initial name server(s) to query and the domain search list. */ #ifndef _PATH_RESCONF #define _PATH_RESCONF "/etc/resolv.conf" #endif #ifndef __P #define __P(x) x #endif typedef enum { res_goahead, res_nextns, res_modified, res_done, res_error } res_sendhookact; typedef res_sendhookact (*res_send_qhook)__P((struct sockaddr * const *ns, const uchar_t **query, int *querylen, uchar_t *ans, int anssiz, int *resplen)); typedef res_sendhookact (*res_send_rhook)__P((const struct sockaddr *ns, const uchar_t *query, int querylen, uchar_t *ans, int anssiz, int *resplen)); struct res_sym { int number; /* Identifying number, like T_MX */ const char *name; /* Its symbolic name, like "MX" */ const char *humanname; /* Its fun name, like "mail exchanger" */ }; /* * Global defines and variables for resolver stub. */ /* ADDRSORT and MAXADDR retained for compatibility; not used */ #define ADDRSORT 1 /* enable the address-sorting option */ #define MAXADDR 10 /* max # addresses to sort by */ #define MAXNS 3 /* max # name servers we'll track */ #define MAXDFLSRCH 3 /* # default domain levels to try */ #define MAXDNSRCH 6 /* max # domains in search path */ #define LOCALDOMAINPARTS 2 /* min levels in name that is "local" */ #define RES_TIMEOUT 5 /* min. seconds between retries */ #define MAXRESOLVSORT 10 /* number of net to sort on */ #define RES_MAXNDOTS 15 /* should reflect bit field size */ #define RES_MAXRETRANS 30 /* only for resolv.conf/RES_OPTIONS */ #define RES_MAXRETRY 5 /* only for resolv.conf/RES_OPTIONS */ #define RES_DFLRETRY 2 /* Default #/tries. */ #define RES_MAXTIME 65535 /* Infinity, in milliseconds. */ struct __res_state_ext; struct __res_state { int retrans; /* retransmission time interval */ int retry; /* number of times to retransmit */ #ifdef __sun uint_t options; /* option flags - see below. */ #else ulong_t options; /* option flags - see below. */ #endif int nscount; /* number of name servers */ struct sockaddr_in nsaddr_list[MAXNS]; /* address of name server */ #define nsaddr nsaddr_list[0] /* for backward compatibility */ ushort_t id; /* current packet id */ char *dnsrch[MAXDNSRCH+1]; /* components of domain to search */ char defdname[256]; /* default domain (deprecated) */ #ifdef __sun uint_t pfcode; /* RES_PRF_ flags - see below. */ #else ulong_t pfcode; /* RES_PRF_ flags - see below. */ #endif unsigned ndots:4; /* threshold for initial abs. query */ unsigned nsort:4; /* number of elements in sort_list[] */ char unused[3]; struct { struct in_addr addr; unsigned int mask; } sort_list[MAXRESOLVSORT]; res_send_qhook qhook; /* query hook */ res_send_rhook rhook; /* response hook */ int res_h_errno; /* last one set for this context */ int _vcsock; /* PRIVATE: for res_send VC i/o */ uint_t _flags; /* PRIVATE: see below */ uint_t _pad; /* make _u 64 bit aligned */ union { /* On an 32-bit arch this means 512b total. */ char pad[72 - 4*sizeof (int) - 2*sizeof (void *)]; struct { uint16_t nscount; uint16_t nstimes[MAXNS]; /* ms. */ int nssocks[MAXNS]; struct __res_state_ext *ext; /* extention for IPv6 */ uchar_t _rnd[16]; /* PRIVATE: random state */ } _ext; } _u; }; typedef struct __res_state *res_state; union res_sockaddr_union { struct sockaddr_in sin; #ifdef IN6ADDR_ANY_INIT struct sockaddr_in6 sin6; #endif #ifdef ISC_ALIGN64 int64_t __align64; /* 64bit alignment */ #else int32_t __align32; /* 32bit alignment */ #endif char __space[128]; /* max size */ }; /* * Resolver flags (used to be discrete per-module statics ints). */ #define RES_F_VC 0x00000001 /* socket is TCP */ #define RES_F_CONN 0x00000002 /* socket is connected */ #define RES_F_EDNS0ERR 0x00000004 /* EDNS0 caused errors */ #define RES_F__UNUSED 0x00000008 /* (unused) */ #define RES_F_LASTMASK 0x000000F0 /* ordinal server of last res_nsend */ #define RES_F_LASTSHIFT 4 /* bit position of LASTMASK "flag" */ #define RES_GETLAST(res) (((res)._flags & RES_F_LASTMASK) >> RES_F_LASTSHIFT) /* res_findzonecut2() options */ #define RES_EXHAUSTIVE 0x00000001 /* always do all queries */ #define RES_IPV4ONLY 0x00000002 /* IPv4 only */ #define RES_IPV6ONLY 0x00000004 /* IPv6 only */ /* * Resolver options (keep these in synch with res_debug.c, please) */ #define RES_INIT 0x00000001 /* address initialized */ #define RES_DEBUG 0x00000002 /* print debug messages */ #define RES_AAONLY 0x00000004 /* authoritative answers only (!IMPL) */ #define RES_USEVC 0x00000008 /* use virtual circuit */ #define RES_PRIMARY 0x00000010 /* query primary server only (!IMPL) */ #define RES_IGNTC 0x00000020 /* ignore trucation errors */ #define RES_RECURSE 0x00000040 /* recursion desired */ #define RES_DEFNAMES 0x00000080 /* use default domain name */ #define RES_STAYOPEN 0x00000100 /* Keep TCP socket open */ #define RES_DNSRCH 0x00000200 /* search up local domain tree */ #define RES_INSECURE1 0x00000400 /* type 1 security disabled */ #define RES_INSECURE2 0x00000800 /* type 2 security disabled */ #define RES_NOALIASES 0x00001000 /* shuts off HOSTALIASES feature */ #define RES_USE_INET6 0x00002000 /* use/map IPv6 in gethostbyname() */ #define RES_ROTATE 0x00004000 /* rotate ns list after each query */ #define RES_NOCHECKNAME 0x00008000 /* do not check names for sanity. */ #define RES_KEEPTSIG 0x00010000 /* do not strip TSIG records */ #define RES_BLAST 0x00020000 /* blast all recursive servers */ #define RES_NO_NIBBLE 0x00040000 /* disable IPv6 nibble mode reverse */ #define RES_NO_BITSTRING 0x00080000 /* disable IPv6 bitstring mode revrse */ #define RES_NOTLDQUERY 0x00100000 /* don't unqualified name as a tld */ #define RES_USE_DNSSEC 0x00200000 /* use DNSSEC using OK bit in OPT */ /* KAME extensions: use higher bit to avoid conflict with ISC use */ #define RES_USE_DNAME 0x10000000 /* use DNAME */ #define RES_USE_EDNS0 0x40000000 /* use EDNS0 if configured */ #define RES_NO_NIBBLE2 0x80000000 /* disable alternate nibble lookup */ #define RES_DEFAULT (RES_RECURSE | RES_DEFNAMES | RES_DNSRCH) /* * Resolver "pfcode" values. Used by dig. */ #define RES_PRF_STATS 0x00000001 #define RES_PRF_UPDATE 0x00000002 #define RES_PRF_CLASS 0x00000004 #define RES_PRF_CMD 0x00000008 #define RES_PRF_QUES 0x00000010 #define RES_PRF_ANS 0x00000020 #define RES_PRF_AUTH 0x00000040 #define RES_PRF_ADD 0x00000080 #define RES_PRF_HEAD1 0x00000100 #define RES_PRF_HEAD2 0x00000200 #define RES_PRF_TTLID 0x00000400 #define RES_PRF_HEADX 0x00000800 #define RES_PRF_QUERY 0x00001000 #define RES_PRF_REPLY 0x00002000 #define RES_PRF_INIT 0x00004000 #define RES_PRF_TRUNC 0x00008000 /* 0x00010000 */ /* Things involving an internal (static) resolver context. */ #ifdef _REENTRANT extern struct __res_state *__res_state(void); #define _res (*__res_state()) #else #ifndef __BIND_NOSTATIC extern struct __res_state _res; #endif #endif #ifndef __BIND_NOSTATIC void fp_nquery __P((const uchar_t *, int, FILE *)); void fp_query __P((const uchar_t *, FILE *)); const char *hostalias __P((const char *)); void p_query __P((const uchar_t *)); void res_close __P((void)); int res_init __P((void)); int res_isourserver __P((const struct sockaddr_in *)); int res_mkquery __P((int, const char *, int, int, const uchar_t *, int, const uchar_t *, uchar_t *, int)); int res_query __P((const char *, int, int, uchar_t *, int)); int res_querydomain __P((const char *, const char *, int, int, uchar_t *, int)); int res_search __P((const char *, int, int, uchar_t *, int)); int res_send __P((const uchar_t *, int, uchar_t *, int)); int res_sendsigned __P((const uchar_t *, int, ns_tsig_key *, uchar_t *, int)); #endif /* __BIND_NOSTATIC */ extern const struct res_sym __p_key_syms[]; extern const struct res_sym __p_cert_syms[]; extern const struct res_sym __p_class_syms[]; extern const struct res_sym __p_type_syms[]; extern const struct res_sym __p_rcode_syms[]; int res_hnok __P((const char *)); int res_ownok __P((const char *)); int res_mailok __P((const char *)); int res_dnok __P((const char *)); int sym_ston __P((const struct res_sym *, const char *, int *)); const char *sym_ntos __P((const struct res_sym *, int, int *)); const char *sym_ntop __P((const struct res_sym *, int, int *)); int b64_ntop __P((uchar_t const *, size_t, char *, size_t)); int b64_pton __P((char const *, uchar_t *, size_t)); int loc_aton __P((const char *ascii, uchar_t *binary)); const char *loc_ntoa __P((const uchar_t *binary, char *ascii)); int dn_skipname __P((const uchar_t *, const uchar_t *)); void putlong __P((unsigned int, uchar_t *)); void putshort __P((unsigned short, uchar_t *)); const char *p_class __P((int)); const char *p_time __P((unsigned int)); const char *p_type __P((int)); const char *p_rcode __P((int)); const char *p_sockun __P((union res_sockaddr_union, char *, size_t)); const uchar_t *p_cdnname __P((const uchar_t *, const uchar_t *, int, FILE *)); const uchar_t *p_cdname __P((const uchar_t *, const uchar_t *, FILE *)); const uchar_t *p_fqnname __P((const uchar_t *cp, const uchar_t *msg, int, char *, int)); const uchar_t *p_fqname __P((const uchar_t *, const uchar_t *, FILE *)); const char *p_option __P((uint_t option)); char *p_secstodate __P((uint_t)); int dn_count_labels __P((const char *)); int dn_comp __P((const char *, uchar_t *, int, uchar_t **, uchar_t **)); int dn_expand __P((const uchar_t *, const uchar_t *, const uchar_t *, char *, int)); void res_rndinit __P((res_state)); uint_t res_randomid __P((void)); uint_t res_nrandomid __P((res_state)); int res_nameinquery __P((const char *, int, int, const uchar_t *, const uchar_t *)); int res_queriesmatch __P((const uchar_t *, const uchar_t *, const uchar_t *, const uchar_t *)); const char *p_section __P((int section, int opcode)); /* Things involving a resolver context. */ int res_ninit __P((res_state)); int res_nisourserver __P((const res_state, const struct sockaddr_in *)); void fp_resstat __P((const res_state, FILE *)); void res_pquery __P((const res_state, const uchar_t *, int, FILE *)); const char *res_hostalias __P((const res_state, const char *, char *, size_t)); int res_nquery __P((res_state, const char *, int, int, uchar_t *, int)); int res_nsearch __P((res_state, const char *, int, int, uchar_t *, int)); int res_nquerydomain __P((res_state, const char *, const char *, int, int, uchar_t *, int)); int res_nmkquery __P((res_state, int, const char *, int, int, const uchar_t *, int, const uchar_t *, uchar_t *, int)); int res_nsend __P((res_state, const uchar_t *, int, uchar_t *, int)); int res_nsendsigned __P((res_state, const uchar_t *, int, ns_tsig_key *, uchar_t *, int)); int res_findzonecut __P((res_state, const char *, ns_class, int, char *, size_t, struct in_addr *, int)); int res_findzonecut2 __P((res_state, const char *, ns_class, int, char *, size_t, union res_sockaddr_union *, int)); void res_nclose __P((res_state)); int res_nopt __P((res_state, int, uchar_t *, int, int)); int res_nopt_rdata __P((res_state, int, uchar_t *, int, uchar_t *, ushort_t, ushort_t, uchar_t *)); void res_send_setqhook __P((res_send_qhook hook)); void res_send_setrhook __P((res_send_rhook hook)); int __res_vinit __P((res_state, int)); void res_destroyservicelist __P((void)); const char *res_servicename __P((uint16_t port, const char *proto)); const char *res_protocolname __P((int num)); void res_destroyprotolist __P((void)); void res_buildprotolist __P((void)); const char *res_get_nibblesuffix __P((res_state)); const char *res_get_nibblesuffix2 __P((res_state)); void res_ndestroy __P((res_state)); uint16_t res_nametoclass __P((const char *buf, int *success)); uint16_t res_nametotype __P((const char *buf, int *success)); void res_setservers __P((res_state, const union res_sockaddr_union *, int)); int res_getservers __P((res_state, union res_sockaddr_union *, int)); #ifdef __cplusplus } #endif #endif /* !_RESOLV_H_ */