| /* |
| * 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 |
| * $Id$ |
| */ |
| |
| #ifndef _RESOLV_H_ |
| #define _RESOLV_H_ |
| |
| #include <sys/param.h> |
| #if !defined(__CYGWIN__) && ((!defined(BSD)) || (BSD < 199306)) |
| # include <sys/bitypes.h> |
| #else |
| # include <sys/types.h> |
| #endif |
| #include <sys/cdefs.h> |
| #include <sys/socket.h> |
| #include <stdio.h> |
| #include <arpa/nameser.h> |
| #include <netinet/in.h> |
| |
| /* |
| * 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 <resolv.h>. |
| * 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 __align; /* 64bit alignment */ |
| #else |
| int32_t __align; /* 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_findzonecut() options */ |
| #define RES_EXHAUSTIVE 0x00000001 /* always do all queries */ |
| |
| /* |
| * 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 bit string mode reverse */ |
| /* 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 |
| /* 0x00008000 */ |
| |
| /* Things involving an internal (static) resolver context. */ |
| #if defined(_REENTRANT) || defined(__CYGWIN__) |
| __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_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 *)); |
| 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)); |
| 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_ */ |
