2 * ++Copyright++ 1983, 1990, 1993
4 * Copyright (c) 1983, 1990, 1993
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by the University of
18 * California, Berkeley and its contributors.
19 * 4. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * 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
56 #if defined(LIBC_SCCS) && !defined(lint)
57 static char sccsid
[] = "@(#)inet_addr.c 8.1 (Berkeley) 6/17/93";
58 static char rcsid
[] = "$Id$";
59 #endif /* LIBC_SCCS and not lint */
61 #include <sys/types.h>
62 #include <sys/param.h>
63 #include <netinet/in.h>
64 #include <arpa/inet.h>
71 #include "../conf/portability.h"
73 /* these are compatibility routines, not needed on recent BSD releases */
76 * Ascii internet address interpretation routine.
77 * The value returned is in network order.
81 register const char *cp
;
85 if (inet_aton(cp
, &val
))
91 * Check whether "cp" is a valid ascii representation
92 * of an Internet address and convert to a binary address.
93 * Returns 1 if the address is valid, 0 if not.
94 * This replaces inet_addr, the return value from which
95 * cannot distinguish between failure and a local broadcast address.
100 struct in_addr
*addr
;
102 register u_int32_t val
; /* changed from u_long --david */
103 register int base
, n
;
106 register u_int
*pp
= parts
;
108 int saved_errno
= errno
;
115 * Collect number up to ``.''.
116 * Values are specified as for C:
117 * 0x=hex, 0=octal, isdigit=decimal.
124 if (c
== 'x' || c
== 'X')
125 base
= 16, c
= *++cp
;
130 val
= strtoul (cp
, (char **) &cp
, base
);
131 if (val
== ULONG_MAX
&& errno
== ERANGE
)
133 __set_errno (saved_errno
);
140 if (isascii(c
) && isdigit(c
)) {
141 val
= (val
* base
) + (c
- '0');
143 } else if (base
== 16 && isascii(c
) && isxdigit(c
)) {
145 (c
+ 10 - (islower(c
) ? 'a' : 'A'));
155 * a.b.c (with c treated as 16 bits)
156 * a.b (with b treated as 24 bits)
166 * Check for trailing characters.
168 if (c
!= '\0' && (!isascii(c
) || !isspace(c
)))
171 * Concoct the address according to
172 * the number of parts specified.
178 return (0); /* initial nondigit */
180 case 1: /* a -- 32 bits */
183 case 2: /* a.b -- 8.24 bits */
186 val
|= parts
[0] << 24;
189 case 3: /* a.b.c -- 8.8.16 bits */
192 val
|= (parts
[0] << 24) | (parts
[1] << 16);
195 case 4: /* a.b.c.d -- 8.8.8.8 bits */
198 val
|= (parts
[0] << 24) | (parts
[1] << 16) | (parts
[2] << 8);
202 addr
->s_addr
= htonl(val
);