source: rtems/cpukit/libnetworking/resolv.h @ 9eadce0

4.104.114.84.9
Last change on this file since 9eadce0 was 39e6e65a, checked in by Joel Sherrill <joel.sherrill@…>, on Aug 19, 1998 at 9:32:28 PM

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1/*-
2 * Copyright (c) 1983, 1987, 1989, 1993
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 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *      This product includes software developed by the University of
16 *      California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34/*
35 * Portions Copyright (c) 1996 by Internet Software Consortium.
36 *
37 * Permission to use, copy, modify, and distribute this software for any
38 * purpose with or without fee is hereby granted, provided that the above
39 * copyright notice and this permission notice appear in all copies.
40 *
41 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
42 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
43 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
44 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
45 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
46 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
47 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
48 * SOFTWARE.
49 */
50
51/*
52 *      @(#)resolv.h    8.1 (Berkeley) 6/2/93
53 *      From Id: resolv.h,v 8.12 1998/04/28 19:36:46 halley Exp $
54 *      $Id$
55 */
56
57#ifndef _RESOLV_H_
58#define _RESOLV_H_
59
60#include <sys/param.h>
61#include <sys/types.h>
62#include <sys/cdefs.h>
63#include <stdio.h>
64
65/*
66 * Revision information.  This is the release date in YYYYMMDD format.
67 * It can change every day so the right thing to do with it is use it
68 * in preprocessor commands such as "#if (__RES > 19931104)".  Do not
69 * compare for equality; rather, use it to determine whether your resolver
70 * is new enough to contain a certain feature.
71 */
72
73#define __RES   19960801
74
75/*
76 * This used to be defined in res_query.c, now it's in herror.c.  It was
77 * never extern'd by any *.h file before it was placed here.  herror.c is
78 * part of libresolv.a even though it might make more sense in libnetdb.a
79 * or even libnet.a.
80 */
81
82extern int h_errno;
83
84/*
85 * Resolver configuration file.
86 * Normally not present, but may contain the address of the
87 * inital name server(s) to query and the domain search list.
88 */
89
90#ifndef _PATH_RESCONF
91#define _PATH_RESCONF        "/etc/resolv.conf"
92#endif
93
94/*
95 * Global defines and variables for resolver stub.
96 */
97#define MAXNS                   3       /* max # name servers we'll track */
98#define MAXDFLSRCH              3       /* # default domain levels to try */
99#define MAXDNSRCH               6       /* max # domains in search path */
100#define LOCALDOMAINPARTS        2       /* min levels in name that is "local" */
101
102#define RES_TIMEOUT             5       /* min. seconds between retries */
103#define MAXRESOLVSORT           10      /* number of net to sort on */
104#define RES_MAXNDOTS            15      /* should reflect bit field size */
105
106struct __res_state {
107        int     retrans;                /* retransmition time interval */
108        int     retry;                  /* number of times to retransmit */
109        u_long  options;                /* option flags - see below. */
110        int     nscount;                /* number of name servers */
111        struct sockaddr_in
112                nsaddr_list[MAXNS];     /* address of name server */
113#define nsaddr  nsaddr_list[0]          /* for backward compatibility */
114        u_short id;                     /* current message id */
115        char    *dnsrch[MAXDNSRCH+1];   /* components of domain to search */
116        char    defdname[256];          /* default domain (deprecated) */
117        u_long  pfcode;                 /* RES_PRF_ flags - see below. */
118        unsigned ndots:4;               /* threshold for initial abs. query */
119        unsigned nsort:4;               /* number of elements in sort_list[] */
120        char    unused[3];
121        struct {
122                struct in_addr  addr;
123                u_int32_t       mask;
124        } sort_list[MAXRESOLVSORT];
125        char    pad[72];                /* on an i386 this means 512b total */
126};
127
128/*
129 * Resolver options (keep these in synch with res_debug.c, please)
130 */
131#define RES_INIT        0x00000001      /* address initialized */
132#define RES_DEBUG       0x00000002      /* print debug messages */
133#define RES_AAONLY      0x00000004      /* authoritative answers only (!IMPL)*/
134#define RES_USEVC       0x00000008      /* use virtual circuit */
135#define RES_PRIMARY     0x00000010      /* query primary server only (!IMPL) */
136#define RES_IGNTC       0x00000020      /* ignore truncation errors */
137#define RES_RECURSE     0x00000040      /* recursion desired */
138#define RES_DEFNAMES    0x00000080      /* use default domain name */
139#define RES_STAYOPEN    0x00000100      /* Keep TCP socket open */
140#define RES_DNSRCH      0x00000200      /* search up local domain tree */
141#define RES_INSECURE1   0x00000400      /* type 1 security disabled */
142#define RES_INSECURE2   0x00000800      /* type 2 security disabled */
143#define RES_NOALIASES   0x00001000      /* shuts off HOSTALIASES feature */
144#define RES_USE_INET6   0x00002000      /* use/map IPv6 in gethostbyname() */
145#define RES_NOTLDQUERY  0x00004000      /* Don't query TLD names */
146
147#define RES_DEFAULT     (RES_RECURSE | RES_DEFNAMES | RES_DNSRCH)
148
149/*
150 * Resolver "pfcode" values.  Used by dig.
151 */
152#define RES_PRF_STATS   0x00000001
153#define RES_PRF_UPDATE  0x00000002
154#define RES_PRF_CLASS   0x00000004
155#define RES_PRF_CMD     0x00000008
156#define RES_PRF_QUES    0x00000010
157#define RES_PRF_ANS     0x00000020
158#define RES_PRF_AUTH    0x00000040
159#define RES_PRF_ADD     0x00000080
160#define RES_PRF_HEAD1   0x00000100
161#define RES_PRF_HEAD2   0x00000200
162#define RES_PRF_TTLID   0x00000400
163#define RES_PRF_HEADX   0x00000800
164#define RES_PRF_QUERY   0x00001000
165#define RES_PRF_REPLY   0x00002000
166#define RES_PRF_INIT    0x00004000
167/*                      0x00008000      */
168
169typedef enum { res_goahead, res_nextns, res_modified, res_done, res_error }
170        res_sendhookact;
171
172typedef res_sendhookact (*res_send_qhook)__P((struct sockaddr_in * const *ns,
173                                              const u_char **query,
174                                              int *querylen,
175                                              u_char *ans,
176                                              int anssiz,
177                                              int *resplen));
178
179typedef res_sendhookact (*res_send_rhook)__P((const struct sockaddr_in *ns,
180                                              const u_char *query,
181                                              int querylen,
182                                              u_char *ans,
183                                              int anssiz,
184                                              int *resplen));
185
186struct res_sym {
187        int     number;         /* Identifying number, like T_MX */
188        char *  name;           /* Its symbolic name, like "MX" */
189        char *  humanname;      /* Its fun name, like "mail exchanger" */
190};
191
192extern struct __res_state _res;
193extern const struct res_sym __p_class_syms[];
194extern const struct res_sym __p_type_syms[];
195
196/* Private routines shared between libc/net, named, nslookup and others. */
197#define res_hnok        __res_hnok
198#define res_ownok       __res_ownok
199#define res_mailok      __res_mailok
200#define res_dnok        __res_dnok
201#define sym_ston        __sym_ston
202#define sym_ntos        __sym_ntos
203#define sym_ntop        __sym_ntop
204#define b64_ntop        __b64_ntop
205#define b64_pton        __b64_pton
206#define loc_ntoa        __loc_ntoa
207#define loc_aton        __loc_aton
208#define fp_resstat      __fp_resstat
209#define p_query         __p_query
210#define dn_skipname     __dn_skipname
211#define fp_resstat      __fp_resstat
212#define fp_query        __fp_query
213#define fp_nquery       __fp_nquery
214#define hostalias       __hostalias
215#define putlong         __putlong
216#define putshort        __putshort
217#define p_class         __p_class
218#define p_time          __p_time
219#define p_type          __p_type
220#define p_query         __p_query
221#define p_cdnname       __p_cdnname
222#define p_section       __p_section
223#define p_cdname        __p_cdname
224#define p_fqnname       __p_fqnname
225#define p_fqname        __p_fqname
226#define p_option        __p_option
227#define p_secstodate    __p_secstodate
228#define dn_count_labels __dn_count_labels
229#define dn_comp         __dn_comp
230#define dn_expand       __dn_expand
231#define res_init        __res_init
232#define res_randomid    __res_randomid
233#define res_query       __res_query
234#define res_search      __res_search
235#define res_querydomain __res_querydomain
236#define res_mkquery     __res_mkquery
237#define res_send        __res_send
238#define res_isourserver __res_isourserver
239#define res_nameinquery __res_nameinquery
240#define res_queriesmatch __res_queriesmatch
241#define res_close       __res_close
242#define res_mkupdate    __res_mkupdate
243#define res_mkupdrec    __res_mkupdrec
244#define res_freeupdrec  __res_freeupdrec
245
246__BEGIN_DECLS
247int             res_hnok __P((const char *));
248int             res_ownok __P((const char *));
249int             res_mailok __P((const char *));
250int             res_dnok __P((const char *));
251int             sym_ston __P((const struct res_sym *, const char *, int *));
252const char *    sym_ntos __P((const struct res_sym *, int, int *));
253const char *    sym_ntop __P((const struct res_sym *, int, int *));
254int             b64_ntop __P((u_char const *, size_t, char *, size_t));
255int             b64_pton __P((char const *, u_char *, size_t));
256int             loc_aton __P((const char *, u_char *));
257const char *    loc_ntoa __P((const u_char *, char *));
258int             dn_skipname __P((const u_char *, const u_char *));
259void            fp_resstat __P((struct __res_state *, FILE *));
260void            fp_query __P((const u_char *, FILE *));
261void            fp_nquery __P((const u_char *, int, FILE *));
262const char *    hostalias __P((const char *));
263void            putlong __P((u_int32_t, u_char *));
264void            putshort __P((u_int16_t, u_char *));
265const char *    p_class __P((int));
266const char *    p_time __P((u_int32_t));
267const char *    p_type __P((int));
268void            p_query __P((const u_char *));
269const u_char *  p_cdnname __P((const u_char *, const u_char *, int, FILE *));
270const u_char *  p_cdname __P((const u_char *, const u_char *, FILE *));
271const u_char *  p_fqnname __P((const u_char *, const u_char *,
272                               int, char *, int));
273const u_char *  p_fqname __P((const u_char *, const u_char *, FILE *));
274const char *    p_option __P((u_long));
275char *          p_secstodate __P((u_long));
276int             dn_count_labels __P((const char *));
277int             dn_comp __P((const char *, u_char *, int,
278                             u_char **, u_char **));
279int             dn_expand __P((const u_char *, const u_char *, const u_char *,
280                               char *, int));
281int             res_init __P((void));
282u_int           res_randomid __P((void));
283int             res_query __P((const char *, int, int, u_char *, int));
284int             res_search __P((const char *, int, int, u_char *, int));
285int             res_querydomain __P((const char *, const char *, int, int,
286                                     u_char *, int));
287int             res_mkquery __P((int, const char *, int, int, const u_char *,
288                                 int, const u_char *, u_char *, int));
289int             res_send __P((const u_char *, int, u_char *, int));
290int             res_isourserver __P((const struct sockaddr_in *));
291int             res_nameinquery __P((const char *, int, int,
292                                     const u_char *, const u_char *));
293int             res_queriesmatch __P((const u_char *, const u_char *,
294                                      const u_char *, const u_char *));
295void            res_close __P((void));
296const char *    p_section __P((int, int));
297/* XXX The following depend on the ns_updrec typedef in arpa/nameser.h */
298#ifdef _ARPA_NAMESER_H_
299int             res_update __P((ns_updrec *));
300int             res_mkupdate __P((ns_updrec *, u_char *, int));
301ns_updrec *     res_mkupdrec __P((int, const char *, u_int, u_int, u_long));
302void            res_freeupdrec __P((ns_updrec *));
303#endif
304__END_DECLS
305
306#endif /* !_RESOLV_H_ */
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