1 /* $NetBSD: inet_addr.c,v 1.3 2012/03/09 15:41:16 christos Exp $ */
4 * Copyright (c) 1983, 1990, 1993
5 * The Regents of the University of California. All rights reserved.
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8 * modification, are permitted provided that the following conditions
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16 * must display the following acknowledgement:
17 * This product includes software developed by the University of
18 * California, Berkeley and its contributors.
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20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
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31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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37 * Portions Copyright (c) 1993 by Digital Equipment Corporation.
39 * Permission to use, copy, modify, and distribute this software for any
40 * purpose with or without fee is hereby granted, provided that the above
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43 * publicity pertaining to distribution of the document or software without
44 * specific, written prior permission.
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47 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
48 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
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50 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
51 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
52 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
57 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
58 * Portions Copyright (c) 1996-1999 by Internet Software Consortium.
60 * Permission to use, copy, modify, and distribute this software for any
61 * purpose with or without fee is hereby granted, provided that the above
62 * copyright notice and this permission notice appear in all copies.
64 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
65 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
66 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
67 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
68 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
69 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
70 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
73 #if !defined(_KERNEL) && !defined(_STANDALONE)
74 #include <sys/cdefs.h>
75 #if defined(LIBC_SCCS) && !defined(lint)
77 static const char sccsid
[] = "@(#)inet_addr.c 8.1 (Berkeley) 6/17/93";
78 static const char rcsid
[] = "Id: inet_addr.c,v 1.2.206.2 2004/03/17 00:29:45 marka Exp";
80 __RCSID("$NetBSD: inet_addr.c,v 1.3 2012/03/09 15:41:16 christos Exp $");
82 #endif /* LIBC_SCCS and not lint */
84 #include "port_before.h"
86 #include "namespace.h"
87 #include <sys/types.h>
88 #include <sys/param.h>
90 #include <netinet/in.h>
91 #include <arpa/inet.h>
95 #include "port_after.h"
98 __weak_alias(inet_aton
,_inet_aton
)
101 #include <lib/libkern/libkern.h>
102 #include <netinet/in.h>
106 * Ascii internet address interpretation routine.
107 * The value returned is in network order.
110 inet_addr(const char *cp
) {
113 if (inet_aton(cp
, &val
))
115 return (INADDR_NONE
);
119 * Check whether "cp" is a valid ascii representation
120 * of an Internet address and convert to a binary address.
121 * Returns 1 if the address is valid, 0 if not.
122 * This replaces inet_addr, the return value from which
123 * cannot distinguish between failure and a local broadcast address.
126 inet_aton(const char *cp
, struct in_addr
*addr
) {
138 * Collect number up to ``.''.
139 * Values are specified as for C:
140 * 0x=hex, 0=octal, isdigit=decimal.
142 if (!isdigit((unsigned char)c
))
144 val
= 0; base
= 10; digit
= 0;
147 if (c
== 'x' || c
== 'X')
148 base
= 16, c
= *++cp
;
155 if (isascii(c
) && isdigit((unsigned char)c
)) {
156 if (base
== 8 && (c
== '8' || c
== '9'))
158 val
= (val
* base
) + (c
- '0');
161 } else if (base
== 16 && isascii(c
) &&
162 isxdigit((unsigned char)c
)) {
164 (c
+ 10 - (islower((unsigned char)c
) ? 'a' : 'A'));
174 * a.b.c (with c treated as 16 bits)
175 * a.b (with b treated as 24 bits)
177 if (pp
>= parts
+ 3 || val
> 0xffU
)
185 * Check for trailing characters.
187 if (c
!= '\0' && (!isascii(c
) || !isspace((unsigned char)c
)))
190 * Did we get a valid digit?
195 * Concoct the address according to
196 * the number of parts specified.
200 case 1: /* a -- 32 bits */
203 case 2: /* a.b -- 8.24 bits */
206 val
|= parts
[0] << 24;
209 case 3: /* a.b.c -- 8.8.16 bits */
212 val
|= (parts
[0] << 24) | (parts
[1] << 16);
215 case 4: /* a.b.c.d -- 8.8.8.8 bits */
218 val
|= (parts
[0] << 24) | (parts
[1] << 16) | (parts
[2] << 8);
222 addr
->s_addr
= htonl(val
);