source: rtems-libbsd/freebsd/lib/libc/resolv/res_comp.c @ f41a394

55-freebsd-126-freebsd-12freebsd-9.3
Last change on this file since f41a394 was 3d1e767, checked in by Sebastian Huber <sebastian.huber@…>, on Apr 27, 2016 at 8:25:22 AM

Directly use <sys/types.h> provided by Newlib

  • Property mode set to 100644
File size: 8.6 KB
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1#include <machine/rtems-bsd-user-space.h>
2
3/*
4 * Copyright (c) 1985, 1993
5 *    The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 4. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32/*
33 * Portions Copyright (c) 1993 by Digital Equipment Corporation.
34 *
35 * Permission to use, copy, modify, and distribute this software for any
36 * purpose with or without fee is hereby granted, provided that the above
37 * copyright notice and this permission notice appear in all copies, and that
38 * the name of Digital Equipment Corporation not be used in advertising or
39 * publicity pertaining to distribution of the document or software without
40 * specific, written prior permission.
41 *
42 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
43 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
44 * OF MERCHANTABILITY AND FITNESS.   IN NO EVENT SHALL DIGITAL EQUIPMENT
45 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
46 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
47 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
48 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
49 * SOFTWARE.
50 */
51
52/*
53 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
54 * Portions Copyright (c) 1996-1999 by Internet Software Consortium.
55 *
56 * Permission to use, copy, modify, and distribute this software for any
57 * purpose with or without fee is hereby granted, provided that the above
58 * copyright notice and this permission notice appear in all copies.
59 *
60 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
61 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
62 * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
63 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
64 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
65 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
66 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
67 */
68
69#if defined(LIBC_SCCS) && !defined(lint)
70static const char sccsid[] = "@(#)res_comp.c    8.1 (Berkeley) 6/4/93";
71static const char rcsid[] = "$Id: res_comp.c,v 1.5 2005/07/28 06:51:50 marka Exp $";
72#endif /* LIBC_SCCS and not lint */
73#include <sys/cdefs.h>
74__FBSDID("$FreeBSD$");
75
76#include "port_before.h"
77#include <sys/types.h>
78#include <rtems/bsd/sys/param.h>
79#include <netinet/in.h>
80#include <arpa/nameser.h>
81#include <ctype.h>
82#include <resolv.h>
83#include <stdio.h>
84#include <string.h>
85#include <unistd.h>
86#include "port_after.h"
87
88/*%
89 * Expand compressed domain name 'src' to full domain name.
90 *
91 * \li 'msg' is a pointer to the begining of the message,
92 * \li 'eom' points to the first location after the message,
93 * \li 'dst' is a pointer to a buffer of size 'dstsiz' for the result.
94 * \li Return size of compressed name or -1 if there was an error.
95 */
96int
97dn_expand(const u_char *msg, const u_char *eom, const u_char *src,
98          char *dst, int dstsiz)
99{
100        int n = ns_name_uncompress(msg, eom, src, dst, (size_t)dstsiz);
101
102        if (n > 0 && dst[0] == '.')
103                dst[0] = '\0';
104        return (n);
105}
106
107/*%
108 * Pack domain name 'exp_dn' in presentation form into 'comp_dn'.
109 *
110 * \li Return the size of the compressed name or -1.
111 * \li 'length' is the size of the array pointed to by 'comp_dn'.
112 */
113int
114dn_comp(const char *src, u_char *dst, int dstsiz,
115        u_char **dnptrs, u_char **lastdnptr)
116{
117        return (ns_name_compress(src, dst, (size_t)dstsiz,
118                                 (const u_char **)dnptrs,
119                                 (const u_char **)lastdnptr));
120}
121
122/*%
123 * Skip over a compressed domain name. Return the size or -1.
124 */
125int
126dn_skipname(const u_char *ptr, const u_char *eom) {
127        const u_char *saveptr = ptr;
128
129        if (ns_name_skip(&ptr, eom) == -1)
130                return (-1);
131        return (ptr - saveptr);
132}
133
134/*%
135 * Verify that a domain name uses an acceptable character set.
136 *
137 * Note the conspicuous absence of ctype macros in these definitions.  On
138 * non-ASCII hosts, we can't depend on string literals or ctype macros to
139 * tell us anything about network-format data.  The rest of the BIND system
140 * is not careful about this, but for some reason, we're doing it right here.
141 */
142#define PERIOD 0x2e
143#define hyphenchar(c) ((c) == 0x2d)
144#define bslashchar(c) ((c) == 0x5c)
145#define underscorechar(c) ((c) == 0x5f)
146#define periodchar(c) ((c) == PERIOD)
147#define asterchar(c) ((c) == 0x2a)
148#define alphachar(c) (((c) >= 0x41 && (c) <= 0x5a) \
149                   || ((c) >= 0x61 && (c) <= 0x7a))
150#define digitchar(c) ((c) >= 0x30 && (c) <= 0x39)
151
152#define borderchar(c) (alphachar(c) || digitchar(c))
153#ifdef  RES_ENFORCE_RFC1034
154#define middlechar(c) (borderchar(c) || hyphenchar(c))
155#else
156#define middlechar(c) (borderchar(c) || hyphenchar(c) || underscorechar(c))
157#endif
158#define domainchar(c) ((c) > 0x20 && (c) < 0x7f)
159
160int
161res_hnok(const char *dn) {
162        int pch = PERIOD, ch = *dn++;
163
164        while (ch != '\0') {
165                int nch = *dn++;
166
167                if (periodchar(ch)) {
168                        (void)NULL;
169                } else if (periodchar(pch)) {
170                        if (!borderchar(ch))
171                                return (0);
172                } else if (periodchar(nch) || nch == '\0') {
173                        if (!borderchar(ch))
174                                return (0);
175                } else {
176                        if (!middlechar(ch))
177                                return (0);
178                }
179                pch = ch, ch = nch;
180        }
181        return (1);
182}
183
184/*%
185 * hostname-like (A, MX, WKS) owners can have "*" as their first label
186 * but must otherwise be as a host name.
187 */
188int
189res_ownok(const char *dn) {
190        if (asterchar(dn[0])) {
191                if (periodchar(dn[1]))
192                        return (res_hnok(dn+2));
193                if (dn[1] == '\0')
194                        return (1);
195        }
196        return (res_hnok(dn));
197}
198
199/*%
200 * SOA RNAMEs and RP RNAMEs can have any printable character in their first
201 * label, but the rest of the name has to look like a host name.
202 */
203int
204res_mailok(const char *dn) {
205        int ch, escaped = 0;
206
207        /* "." is a valid missing representation */
208        if (*dn == '\0')
209                return (1);
210
211        /* otherwise <label>.<hostname> */
212        while ((ch = *dn++) != '\0') {
213                if (!domainchar(ch))
214                        return (0);
215                if (!escaped && periodchar(ch))
216                        break;
217                if (escaped)
218                        escaped = 0;
219                else if (bslashchar(ch))
220                        escaped = 1;
221        }
222        if (periodchar(ch))
223                return (res_hnok(dn));
224        return (0);
225}
226
227/*%
228 * This function is quite liberal, since RFC1034's character sets are only
229 * recommendations.
230 */
231int
232res_dnok(const char *dn) {
233        int ch;
234
235        while ((ch = *dn++) != '\0')
236                if (!domainchar(ch))
237                        return (0);
238        return (1);
239}
240
241#ifdef BIND_4_COMPAT
242/*%
243 * This module must export the following externally-visible symbols:
244 *      ___putlong
245 *      ___putshort
246 *      __getlong
247 *      __getshort
248 * Note that one _ comes from C and the others come from us.
249 */
250
251#ifdef SOLARIS2
252#ifdef  __putlong
253#undef  __putlong
254#endif
255#ifdef  __putshort
256#undef  __putshort
257#endif
258#pragma weak    putlong         =       __putlong
259#pragma weak    putshort        =       __putshort
260#endif /* SOLARIS2 */
261
262void __putlong(u_int32_t src, u_char *dst) { ns_put32(src, dst); }
263void __putshort(u_int16_t src, u_char *dst) { ns_put16(src, dst); }
264#ifndef __ultrix__
265u_int32_t _getlong(const u_char *src) { return (ns_get32(src)); }
266u_int16_t _getshort(const u_char *src) { return (ns_get16(src)); }
267#endif /*__ultrix__*/
268#endif /*BIND_4_COMPAT*/
269
270/*
271 * Weak aliases for applications that use certain private entry points,
272 * and fail to include <resolv.h>.
273 */
274#undef dn_comp
275__weak_reference(__dn_comp, dn_comp);
276#undef dn_expand
277__weak_reference(__dn_expand, dn_expand);
278
279/*! \file */
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