source: rtems/cpukit/libnetworking/libc/inet_addr.c @ 9b035a0a

Last change on this file since 9b035a0a was 9b035a0a, checked in by Sebastian Huber <sebastian.huber@…>, on Jun 7, 2017 at 5:11:23 AM

network: Update <arpa/inet.h>

Update #2833.

  • Property mode set to 100644
File size: 6.6 KB
Line 
1/*
2 * Copyright (c) 1983, 1990, 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. 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) 1993 by Digital Equipment Corporation.
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, and that
36 * the name of Digital Equipment Corporation not be used in advertising or
37 * publicity pertaining to distribution of the document or software without
38 * specific, written prior permission.
39 *
40 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
41 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
42 * OF MERCHANTABILITY AND FITNESS.   IN NO EVENT SHALL DIGITAL EQUIPMENT
43 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
44 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
45 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
46 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
47 * SOFTWARE.
48 */
49
50/*
51 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
52 * Portions Copyright (c) 1996-1999 by Internet Software Consortium.
53 *
54 * Permission to use, copy, modify, and distribute this software for any
55 * purpose with or without fee is hereby granted, provided that the above
56 * copyright notice and this permission notice appear in all copies.
57 *
58 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
59 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
60 * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
61 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
62 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
63 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
64 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
65 */
66
67#if defined(LIBC_SCCS) && !defined(lint)
68static const char sccsid[] = "@(#)inet_addr.c   8.1 (Berkeley) 6/17/93";
69static const char rcsid[] = "$Id: inet_addr.c,v 1.5 2005/04/27 04:56:19 sra Exp $";
70#endif /* LIBC_SCCS and not lint */
71#include <sys/cdefs.h>
72__FBSDID("$FreeBSD: head/lib/libc/inet/inet_addr.c 314436 2017-02-28 23:42:47Z imp $");
73
74#include "port_before.h"
75
76#include <sys/param.h>
77
78#include <netinet/in.h>
79#include <arpa/inet.h>
80
81#include <ctype.h>
82
83#include "port_after.h"
84
85/*%
86 * Ascii internet address interpretation routine.
87 * The value returned is in network order.
88 */
89in_addr_t               /* XXX should be struct in_addr :( */
90inet_addr(const char *cp) {
91        struct in_addr val;
92
93        if (inet_aton(cp, &val))
94                return (val.s_addr);
95        return (INADDR_NONE);
96}
97
98/*%
99 * Check whether "cp" is a valid ascii representation
100 * of an Internet address and convert to a binary address.
101 * Returns 1 if the address is valid, 0 if not.
102 * This replaces inet_addr, the return value from which
103 * cannot distinguish between failure and a local broadcast address.
104 */
105int
106inet_aton(const char *cp, struct in_addr *addr) {
107        u_long val;
108        int base, n;
109        char c;
110        u_int8_t parts[4];
111        u_int8_t *pp = parts;
112        int digit;
113
114        c = *cp;
115        for (;;) {
116                /*
117                 * Collect number up to ``.''.
118                 * Values are specified as for C:
119                 * 0x=hex, 0=octal, isdigit=decimal.
120                 */
121                if (!isdigit((unsigned char)c))
122                        return (0);
123                val = 0; base = 10; digit = 0;
124                if (c == '0') {
125                        c = *++cp;
126                        if (c == 'x' || c == 'X')
127                                base = 16, c = *++cp;
128                        else {
129                                base = 8;
130                                digit = 1 ;
131                        }
132                }
133                for (;;) {
134                        if (isascii(c) && isdigit((unsigned char)c)) {
135                                if (base == 8 && (c == '8' || c == '9'))
136                                        return (0);
137                                val = (val * base) + (c - '0');
138                                c = *++cp;
139                                digit = 1;
140                        } else if (base == 16 && isascii(c) && 
141                                   isxdigit((unsigned char)c)) {
142                                val = (val << 4) |
143                                        (c + 10 - (islower((unsigned char)c) ? 'a' : 'A'));
144                                c = *++cp;
145                                digit = 1;
146                        } else
147                                break;
148                }
149                if (c == '.') {
150                        /*
151                         * Internet format:
152                         *      a.b.c.d
153                         *      a.b.c   (with c treated as 16 bits)
154                         *      a.b     (with b treated as 24 bits)
155                         */
156                        if (pp >= parts + 3 || val > 0xffU)
157                                return (0);
158                        *pp++ = val;
159                        c = *++cp;
160                } else
161                        break;
162        }
163        /*
164         * Check for trailing characters.
165         */
166        if (c != '\0' && (!isascii(c) || !isspace((unsigned char)c)))
167                return (0);
168        /*
169         * Did we get a valid digit?
170         */
171        if (!digit)
172                return (0);
173        /*
174         * Concoct the address according to
175         * the number of parts specified.
176         */
177        n = pp - parts + 1;
178        switch (n) {
179        case 1:                         /*%< a -- 32 bits */
180                break;
181
182        case 2:                         /*%< a.b -- 8.24 bits */
183                if (val > 0xffffffU)
184                        return (0);
185                val |= parts[0] << 24;
186                break;
187
188        case 3:                         /*%< a.b.c -- 8.8.16 bits */
189                if (val > 0xffffU)
190                        return (0);
191                val |= (parts[0] << 24) | (parts[1] << 16);
192                break;
193
194        case 4:                         /*%< a.b.c.d -- 8.8.8.8 bits */
195                if (val > 0xffU)
196                        return (0);
197                val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8);
198                break;
199        }
200        if (addr != NULL)
201                addr->s_addr = htonl(val);
202        return (1);
203}
204
205/*
206 * Weak aliases for applications that use certain private entry points,
207 * and fail to include <arpa/inet.h>.
208 */
209#undef inet_addr
210__weak_reference(__inet_addr, inet_addr);
211#undef inet_aton
212__weak_reference(__inet_aton, inet_aton);
213
214/*! \file */
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