2 * Copyright (c) 1983, 1990, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
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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
35 * Portions Copyright (c) 1993 by Digital Equipment Corporation.
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, and that
40 * the name of Digital Equipment Corporation not be used in advertising or
41 * publicity pertaining to distribution of the document or software without
42 * specific, written prior permission.
44 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
45 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
46 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
47 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
48 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
49 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
50 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
55 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
56 * Portions Copyright (c) 1996-1999 by Internet Software Consortium.
58 * Permission to use, copy, modify, and distribute this software for any
59 * purpose with or without fee is hereby granted, provided that the above
60 * copyright notice and this permission notice appear in all copies.
62 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
63 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
64 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
65 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
66 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
67 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
68 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
71 #if defined(LIBC_SCCS) && !defined(lint)
72 static const char sccsid[] = "@(#)inet_addr.c 8.1 (Berkeley) 6/17/93";
73 static const char rcsid[] = "$Id: inet_addr.c,v 1.2.206.2 2004/03/17 00:29:45 marka Exp $";
74 #endif /* LIBC_SCCS and not lint */
75 #include <sys/cdefs.h>
76 __FBSDID("$FreeBSD$");
78 #include "port_before.h"
80 #include <sys/types.h>
81 #include <sys/param.h>
83 #include <netinet/in.h>
84 #include <arpa/inet.h>
88 #include "port_after.h"
91 * Ascii internet address interpretation routine.
92 * The value returned is in network order.
94 in_addr_t /* XXX should be struct in_addr :( */
95 inet_addr(const char *cp) {
98 if (inet_aton(cp, &val))
100 return (INADDR_NONE);
104 * Check whether "cp" is a valid ascii representation
105 * of an Internet address and convert to a binary address.
106 * Returns 1 if the address is valid, 0 if not.
107 * This replaces inet_addr, the return value from which
108 * cannot distinguish between failure and a local broadcast address.
111 inet_aton(const char *cp, struct in_addr *addr) {
116 u_int8_t *pp = parts;
122 * Collect number up to ``.''.
123 * Values are specified as for C:
124 * 0x=hex, 0=octal, isdigit=decimal.
126 if (!isdigit((unsigned char)c))
128 val = 0; base = 10; digit = 0;
131 if (c == 'x' || c == 'X')
132 base = 16, c = *++cp;
139 if (isascii(c) && isdigit((unsigned char)c)) {
140 if (base == 8 && (c == '8' || c == '9'))
142 val = (val * base) + (c - '0');
145 } else if (base == 16 && isascii(c) &&
146 isxdigit((unsigned char)c)) {
148 (c + 10 - (islower((unsigned char)c) ? 'a' : 'A'));
158 * a.b.c (with c treated as 16 bits)
159 * a.b (with b treated as 24 bits)
161 if (pp >= parts + 3 || val > 0xffU)
169 * Check for trailing characters.
171 if (c != '\0' && (!isascii(c) || !isspace((unsigned char)c)))
174 * Did we get a valid digit?
179 * Concoct the address according to
180 * the number of parts specified.
184 case 1: /* a -- 32 bits */
187 case 2: /* a.b -- 8.24 bits */
190 val |= parts[0] << 24;
193 case 3: /* a.b.c -- 8.8.16 bits */
196 val |= (parts[0] << 24) | (parts[1] << 16);
199 case 4: /* a.b.c.d -- 8.8.8.8 bits */
202 val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8);
206 addr->s_addr = htonl(val);
211 * Weak aliases for applications that use certain private entry points,
212 * and fail to include <arpa/inet.h>.
215 __weak_reference(__inet_addr, inet_addr);
217 __weak_reference(__inet_aton, inet_aton);