resolv/resolv.h

   1 /*
   2  * Copyright (c) 1983, 1987, 1989
   3  *    The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 4. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 /*
  31  * Portions Copyright (c) 1996-1999 by Internet Software Consortium.
  32  *
  33  * Permission to use, copy, modify, and distribute this software for any
  34  * purpose with or without fee is hereby granted, provided that the above
  35  * copyright notice and this permission notice appear in all copies.
  36  *
  37  * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
  38  * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
  39  * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
  40  * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
  41  * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
  42  * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
  43  * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
  44  * SOFTWARE.
  45  */
  46
  47 /*
  48  *      @(#)resolv.h    8.1 (Berkeley) 6/2/93
  49  *      $BINDId: resolv.h,v 8.31 2000/03/30 20:16:50 vixie Exp $
  50  */
  51
  52 #ifndef _RESOLV_H_
  53 #define _RESOLV_H_
  54
  55 #include <sys/cdefs.h>
  56 #include <sys/param.h>
  57 #include <sys/types.h>
  58 #include <stdio.h>
  59 #include <netinet/in.h>
  60 #include <arpa/nameser.h>
  61 #include <bits/types/res_state.h>
  62
  63 /*
  64  * Global defines and variables for resolver stub.
  65  */
  66 #define LOCALDOMAINPARTS        2       /* min levels in name that is "local" */
  67
  68 #define RES_TIMEOUT             5       /* min. seconds between retries */
  69 #define RES_MAXNDOTS            15      /* should reflect bit field size */
  70 #define RES_MAXRETRANS          30      /* only for resolv.conf/RES_OPTIONS */
  71 #define RES_MAXRETRY            5       /* only for resolv.conf/RES_OPTIONS */
  72 #define RES_DFLRETRY            2       /* Default #/tries. */
  73 #define RES_MAXTIME             65535   /* Infinity, in milliseconds. */
  74
  75 #define nsaddr  nsaddr_list[0]          /* for backward compatibility */
  76
  77 /*
  78  * Revision information.  This is the release date in YYYYMMDD format.
  79  * It can change every day so the right thing to do with it is use it
  80  * in preprocessor commands such as "#if (__RES > 19931104)".  Do not
  81  * compare for equality; rather, use it to determine whether your resolver
  82  * is new enough to contain a certain feature.
  83  */
  84
  85 #define __RES   19991006
  86
  87 /*
  88  * Resolver configuration file.
  89  * Normally not present, but may contain the address of the
  90  * inital name server(s) to query and the domain search list.
  91  */
  92
  93 #ifndef _PATH_RESCONF
  94 #define _PATH_RESCONF        "/etc/resolv.conf"
  95 #endif
  96
  97 struct res_sym {
  98         int     number;         /* Identifying number, like T_MX */
  99         char *  name;           /* Its symbolic name, like "MX" */
 100         char *  humanname;      /* Its fun name, like "mail exchanger" */
 101 };
 102
 103 /*
 104  * Resolver options (keep these in synch with res_debug.c, please)
 105  */
 106 #define RES_INIT        0x00000001      /* address initialized */
 107 #define RES_DEBUG       0x00000002      /* print debug messages */
 108 #define RES_AAONLY \
 109   __glibc_macro_warning ("RES_AAONLY is deprecated") 0x00000004
 110 #define RES_USEVC       0x00000008      /* use virtual circuit */
 111 #define RES_PRIMARY \
 112   __glibc_macro_warning ("RES_PRIMARY is deprecated") 0x00000010
 113 #define RES_IGNTC       0x00000020      /* ignore trucation errors */
 114 #define RES_RECURSE     0x00000040      /* recursion desired */
 115 #define RES_DEFNAMES    0x00000080      /* use default domain name */
 116 #define RES_STAYOPEN    0x00000100      /* Keep TCP socket open */
 117 #define RES_DNSRCH      0x00000200      /* search up local domain tree */
 118 #define RES_NOALIASES   0x00001000      /* shuts off HOSTALIASES feature */
 119 #define RES_ROTATE      0x00004000      /* rotate ns list after each query */
 120 #define RES_NOCHECKNAME \
 121   __glibc_macro_warning ("RES_NOCHECKNAME is deprecated") 0x00008000
 122 #define RES_KEEPTSIG \
 123   __glibc_macro_warning ("RES_KEEPTSIG is deprecated") 0x00010000
 124 #define RES_BLAST \
 125   __glibc_macro_warning ("RES_BLAST is deprecated") 0x00020000
 126 #define RES_USE_EDNS0   0x00100000      /* Use EDNS0.  */
 127 #define RES_SNGLKUP     0x00200000      /* one outstanding request at a time */
 128 #define RES_SNGLKUPREOP 0x00400000      /* -"-, but open new socket for each
 129                                            request */
 130 #define RES_USE_DNSSEC  0x00800000      /* use DNSSEC using OK bit in OPT */
 131 #define RES_NOTLDQUERY  0x01000000      /* Do not look up unqualified name
 132                                            as a TLD.  */
 133 #define RES_NORELOAD    0x02000000 /* No automatic configuration reload.  */
 134
 135 #define RES_DEFAULT     (RES_RECURSE|RES_DEFNAMES|RES_DNSRCH)
 136
 137 /*
 138  * Resolver "pfcode" values.  Used by dig.
 139  */
 140 #define RES_PRF_STATS   0x00000001
 141 #define RES_PRF_UPDATE  0x00000002
 142 #define RES_PRF_CLASS   0x00000004
 143 #define RES_PRF_CMD     0x00000008
 144 #define RES_PRF_QUES    0x00000010
 145 #define RES_PRF_ANS     0x00000020
 146 #define RES_PRF_AUTH    0x00000040
 147 #define RES_PRF_ADD     0x00000080
 148 #define RES_PRF_HEAD1   0x00000100
 149 #define RES_PRF_HEAD2   0x00000200
 150 #define RES_PRF_TTLID   0x00000400
 151 #define RES_PRF_HEADX   0x00000800
 152 #define RES_PRF_QUERY   0x00001000
 153 #define RES_PRF_REPLY   0x00002000
 154 #define RES_PRF_INIT    0x00004000
 155 /*                      0x00008000      */
 156
 157 /* Things involving an internal (static) resolver context. */
 158 __BEGIN_DECLS
 159 extern struct __res_state *__res_state(void) __attribute__ ((__const__));
 160 __END_DECLS
 161 #define _res (*__res_state())
 162
 163 #define fp_nquery               __fp_nquery
 164 #define fp_query                __fp_query
 165 #define hostalias               __hostalias
 166 #define p_query                 __p_query
 167 #define res_close               __res_close
 168 #define res_init                __res_init
 169 #define res_isourserver         __res_isourserver
 170 #define res_mkquery             __res_mkquery
 171 #define res_query               __res_query
 172 #define res_querydomain         __res_querydomain
 173 #define res_search              __res_search
 174 #define res_send                __res_send
 175
 176 __BEGIN_DECLS
 177 void            fp_nquery (const unsigned char *, int, FILE *) __THROW;
 178 void            fp_query (const unsigned char *, FILE *) __THROW;
 179 const char *    hostalias (const char *) __THROW;
 180 void            p_query (const unsigned char *) __THROW;
 181 void            res_close (void) __THROW;
 182 int             res_init (void) __THROW;
 183 int             res_isourserver (const struct sockaddr_in *) __THROW;
 184 int             res_mkquery (int, const char *, int, int,
 185                              const unsigned char *, int, const unsigned char *,
 186                              unsigned char *, int) __THROW;
 187 int             res_query (const char *, int, int, unsigned char *, int)
 188      __THROW;
 189 int             res_querydomain (const char *, const char *, int, int,
 190                                  unsigned char *, int) __THROW;
 191 int             res_search (const char *, int, int, unsigned char *, int)
 192      __THROW;
 193 int             res_send (const unsigned char *, int, unsigned char *, int)
 194      __THROW;
 195 __END_DECLS
 196
 197 #define b64_ntop                __b64_ntop
 198 #define b64_pton                __b64_pton
 199 #define dn_comp                 __dn_comp
 200 #define dn_count_labels         __dn_count_labels
 201 #define dn_expand               __dn_expand
 202 #define dn_skipname             __dn_skipname
 203 #define fp_resstat              __fp_resstat
 204 #define loc_aton                __loc_aton
 205 #define loc_ntoa                __loc_ntoa
 206 #define p_cdname                __p_cdname
 207 #define p_cdnname               __p_cdnname
 208 #define p_class                 __p_class
 209 #define p_fqname                __p_fqname
 210 #define p_fqnname               __p_fqnname
 211 #define p_option                __p_option
 212 #define p_time                  __p_time
 213 #define p_type                  __p_type
 214 #define p_rcode                 __p_rcode
 215 #define putlong                 __putlong
 216 #define putshort                __putshort
 217 #define res_dnok                __res_dnok
 218 #define res_hnok                __res_hnok
 219 #define res_hostalias           __res_hostalias
 220 #define res_mailok              __res_mailok
 221 #define res_nameinquery         __res_nameinquery
 222 #define res_nclose              __res_nclose
 223 #define res_ninit               __res_ninit
 224 #define res_nmkquery            __res_nmkquery
 225 #define res_nquery              __res_nquery
 226 #define res_nquerydomain        __res_nquerydomain
 227 #define res_nsearch             __res_nsearch
 228 #define res_nsend               __res_nsend
 229 #define res_ownok               __res_ownok
 230 #define res_queriesmatch        __res_queriesmatch
 231 #define res_randomid            __res_randomid
 232 #define sym_ntop                __sym_ntop
 233 #define sym_ntos                __sym_ntos
 234 #define sym_ston                __sym_ston
 235 __BEGIN_DECLS
 236 int             res_hnok (const char *) __THROW;
 237 int             res_ownok (const char *) __THROW;
 238 int             res_mailok (const char *) __THROW;
 239 int             res_dnok (const char *) __THROW;
 240 int             sym_ston (const struct res_sym *, const char *, int *) __THROW;
 241 const char *    sym_ntos (const struct res_sym *, int, int *) __THROW;
 242 const char *    sym_ntop (const struct res_sym *, int, int *) __THROW;
 243 int             b64_ntop (const unsigned char *, size_t, char *, size_t)
 244      __THROW;
 245 int             b64_pton (char const *, unsigned char *, size_t) __THROW;
 246 int             loc_aton (const char *__ascii, unsigned char *__binary) __THROW;
 247 const char *    loc_ntoa (const unsigned char *__binary, char *__ascii) __THROW;
 248 int             dn_skipname (const unsigned char *, const unsigned char *)
 249      __THROW;
 250 void            putlong (uint32_t, unsigned char *) __THROW;
 251 void            putshort (uint16_t, unsigned char *) __THROW;
 252 const char *    p_class (int) __THROW;
 253 const char *    p_time (uint32_t) __THROW;
 254 const char *    p_type (int) __THROW;
 255 const char *    p_rcode (int) __THROW;
 256 const unsigned char * p_cdnname (const unsigned char *,
 257                                  const unsigned char *, int, FILE *) __THROW;
 258 const unsigned char * p_cdname (const unsigned char *, const unsigned char *,
 259                                 FILE *) __THROW;
 260 const unsigned char * p_fqnname (const unsigned char *__cp,
 261                                  const unsigned char *__msg,
 262                                  int, char *, int) __THROW;
 263 const unsigned char * p_fqname (const unsigned char *,
 264                                 const unsigned char *, FILE *) __THROW;
 265 const char *    p_option (unsigned long __option) __THROW;
 266 int             dn_count_labels (const char *) __THROW;
 267 int             dn_comp (const char *, unsigned char *, int, unsigned char **,
 268                          unsigned char **) __THROW;
 269 int             dn_expand (const unsigned char *, const unsigned char *,
 270                            const unsigned char *, char *, int) __THROW;
 271 unsigned int    res_randomid (void) __THROW;
 272 int             res_nameinquery (const char *, int, int,
 273                                  const unsigned char *,
 274                                  const unsigned char *) __THROW;
 275 int             res_queriesmatch (const unsigned char *,
 276                                   const unsigned char *,
 277                                   const unsigned char *,
 278                                   const unsigned char *) __THROW;
 279 /* Things involving a resolver context. */
 280 int             res_ninit (res_state) __THROW;
 281 void            fp_resstat (const res_state, FILE *) __THROW;
 282 const char *    res_hostalias (const res_state, const char *, char *, size_t)
 283      __THROW;
 284 int             res_nquery (res_state, const char *, int, int,
 285                             unsigned char *, int) __THROW;
 286 int             res_nsearch (res_state, const char *, int, int,
 287                              unsigned char *, int) __THROW;
 288 int             res_nquerydomain (res_state, const char *, const char *, int,
 289                                   int, unsigned char *, int) __THROW;
 290 int             res_nmkquery (res_state, int, const char *, int, int,
 291                               const unsigned char *, int,
 292                               const unsigned char *, unsigned char *, int)
 293      __THROW;
 294 int             res_nsend (res_state, const unsigned char *, int,
 295                            unsigned char *, int) __THROW;
 296 void            res_nclose (res_state) __THROW;
 297
 298 __END_DECLS
 299
 300 #endif /* !_RESOLV_H_ */