/* * 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 8.45 2002/04/12 06:27:48 marka Exp $ */ #ifndef _RESOLV_H_ #define _RESOLV_H_ #include #if (!defined(BSD)) || (BSD < 199306) # include #else # include #endif #include #include #include #include /* * 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 19991006 /* * This used to be defined in res_query.c, now it's in herror.c. * [XXX no it's not. It's in irs/irs_data.c] * It was * never extern'd by any *.h file before it was placed here. For thread * aware programs, the last h_errno value set is stored in res->h_errno. * * XXX: There doesn't seem to be a good reason for exposing RES_SET_H_ERRNO * (and __h_errno_set) to the public via . * XXX: __h_errno_set is really part of IRS, not part of the resolver. * If somebody wants to build and use a resolver that doesn't use IRS, * what do they do? Perhaps something like * #ifdef WANT_IRS * # define RES_SET_H_ERRNO(r,x) __h_errno_set(r,x) * #else * # define RES_SET_H_ERRNO(r,x) (h_errno = (r)->res_h_errno = (x)) * #endif */ #define RES_SET_H_ERRNO(r,x) __h_errno_set(r,x) struct __res_state; /* forward */ __BEGIN_DECLS void __h_errno_set(struct __res_state *res, int err); __END_DECLS /* * Resolver configuration file. * Normally not present, but may contain the address of the * inital name server(s) to query and the domain search list. */ #ifndef _PATH_RESCONF #define _PATH_RESCONF "/etc/resolv.conf" #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 u_char **query, int *querylen, u_char *ans, int anssiz, int *resplen)); typedef res_sendhookact (*res_send_rhook)__P((const struct sockaddr *ns, const u_char *query, int querylen, u_char *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. */ #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; /* retransmition time interval */ int retry; /* number of times to retransmit */ u_long options; /* option flags - see below. */ int nscount; /* number of name servers */ struct sockaddr_in nsaddr_list[MAXNS]; /* address of name server */ #define nsaddr nsaddr_list[0] /* for backward compatibility */ u_short id; /* current message id */ char *dnsrch[MAXDNSRCH+1]; /* components of domain to search */ char defdname[256]; /* default domain (deprecated) */ u_long pfcode; /* RES_PRF_ flags - see below. */ 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; u_int32_t 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 */ u_int _flags; /* PRIVATE: see below */ union { /* On an 32-bit arch this means 512b total. */ char pad[72 - 3*sizeof (int) - 2*sizeof (void *)]; struct { u_int16_t nscount; u_int16_t nstimes[MAXNS]; /* ms. */ int nssocks[MAXNS]; struct __res_state_ext *ext; /* extention for IPv6 */ } _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 */ /* 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 reverse */ #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_A6 0x20000000 /* use A6 */ #define RES_USE_EDNS0 0x40000000 /* use EDNS0 if configured */ #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 __BEGIN_DECLS extern struct __res_state *__res_state(void); __END_DECLS #define _res (*__res_state()) #else #ifndef __BIND_NOSTATIC extern struct __res_state _res; #endif #endif #ifndef __BIND_NOSTATIC #define fp_nquery __fp_nquery #define fp_query __fp_query #define hostalias __hostalias #define p_query __p_query #define res_close __res_close #define res_init __res_init #define res_isourserver __res_isourserver #define res_mkquery __res_mkquery #define res_query __res_query #define res_querydomain __res_querydomain #define res_search __res_search #define res_send __res_send #define res_sendsigned __res_sendsigned __BEGIN_DECLS void fp_nquery __P((const u_char *, int, FILE *)); void fp_query __P((const u_char *, FILE *)); const char * hostalias __P((const char *)); void p_query __P((const u_char *)); 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 u_char *, int, const u_char *, u_char *, int)); int res_query __P((const char *, int, int, u_char *, int)); int res_querydomain __P((const char *, const char *, int, int, u_char *, int)); int res_search __P((const char *, int, int, u_char *, int)); int res_send __P((const u_char *, int, u_char *, int)); int res_sendsigned __P((const u_char *, int, ns_tsig_key *, u_char *, int)); __END_DECLS #endif #if !defined(SHARED_LIBBIND) || defined(LIB) /* * If libbind is a shared object (well, DLL anyway) * these externs break the linker when resolv.h is * included by a lib client (like named) * Make them go away if a client is including this * */ 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[]; #endif /* SHARED_LIBBIND */ #define b64_ntop __b64_ntop #define b64_pton __b64_pton #define dn_comp __dn_comp #define dn_count_labels __dn_count_labels #define dn_expand __dn_expand #define dn_skipname __dn_skipname #define fp_resstat __fp_resstat #define loc_aton __loc_aton #define loc_ntoa __loc_ntoa #define p_cdname __p_cdname #define p_cdnname __p_cdnname #define p_class __p_class #define p_fqname __p_fqname #define p_fqnname __p_fqnname #define p_option __p_option #define p_secstodate __p_secstodate #define p_section __p_section #define p_time __p_time #define p_type __p_type #define p_rcode __p_rcode #define putlong __putlong #define putshort __putshort #define res_dnok __res_dnok #define res_findzonecut __res_findzonecut #define res_findzonecut2 __res_findzonecut2 #define res_hnok __res_hnok #define res_hostalias __res_hostalias #define res_mailok __res_mailok #define res_nameinquery __res_nameinquery #define res_nclose __res_nclose #define res_ninit __res_ninit #define res_nmkquery __res_nmkquery #define res_pquery __res_pquery #define res_nquery __res_nquery #define res_nquerydomain __res_nquerydomain #define res_nsearch __res_nsearch #define res_nsend __res_nsend #define res_nsendsigned __res_nsendsigned #define res_nisourserver __res_nisourserver #define res_ownok __res_ownok #define res_queriesmatch __res_queriesmatch #define res_randomid __res_randomid #define sym_ntop __sym_ntop #define sym_ntos __sym_ntos #define sym_ston __sym_ston #define res_nopt __res_nopt #define res_ndestroy __res_ndestroy #define res_nametoclass __res_nametoclass #define res_nametotype __res_nametotype #define res_setservers __res_setservers #define res_getservers __res_getservers __BEGIN_DECLS 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((u_char const *, size_t, char *, size_t)); int b64_pton __P((char const *, u_char *, size_t)); int loc_aton __P((const char *ascii, u_char *binary)); const char * loc_ntoa __P((const u_char *binary, char *ascii)); int dn_skipname __P((const u_char *, const u_char *)); void putlong __P((u_int32_t, u_char *)); void putshort __P((u_int16_t, u_char *)); #ifndef __ultrix__ u_int16_t _getshort __P((const u_char *src)); u_int32_t _getlong __P((const u_char *src)); #endif const char * p_class __P((int)); const char * p_time __P((u_int32_t)); const char * p_type __P((int)); const char * p_rcode __P((int)); const u_char * p_cdnname __P((const u_char *, const u_char *, int, FILE *)); const u_char * p_cdname __P((const u_char *, const u_char *, FILE *)); const u_char * p_fqnname __P((const u_char *cp, const u_char *msg, int, char *, int)); const u_char * p_fqname __P((const u_char *, const u_char *, FILE *)); const char * p_option __P((u_long option)); char * p_secstodate __P((u_long)); int dn_count_labels __P((const char *)); int dn_comp __P((const char *, u_char *, int, u_char **, u_char **)); int dn_expand __P((const u_char *, const u_char *, const u_char *, char *, int)); u_int res_randomid __P((void)); int res_nameinquery __P((const char *, int, int, const u_char *, const u_char *)); int res_queriesmatch __P((const u_char *, const u_char *, const u_char *, const u_char *)); 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 u_char *, 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, u_char *, int)); int res_nsearch __P((res_state, const char *, int, int, u_char *, int)); int res_nquerydomain __P((res_state, const char *, const char *, int, int, u_char *, int)); int res_nmkquery __P((res_state, int, const char *, int, int, const u_char *, int, const u_char *, u_char *, int)); int res_nsend __P((res_state, const u_char *, int, u_char *, int)); int res_nsendsigned __P((res_state, const u_char *, int, ns_tsig_key *, u_char *, 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, u_char *, int, int)); 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((u_int16_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_bitstringsuffix __P((res_state)); void res_ndestroy __P((res_state)); u_int16_t res_nametoclass __P((const char *buf, int *success)); u_int16_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)); __END_DECLS #endif /* !_RESOLV_H_ */