1 /* Snagged from GNU C library, version 2.0.3. */
4 * ++Copyright++ 1983, 1990, 1993
6 * Copyright (c) 1983, 1990, 1993
7 * The Regents of the University of California. All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
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13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by the University of
20 * California, Berkeley and its contributors.
21 * 4. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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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42 * the name of Digital Equipment Corporation not be used in advertising or
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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58 #if defined(LIBC_SCCS) && !defined(lint)
59 static char sccsid[] = "@(#)inet_addr.c 8.1 (Berkeley) 6/17/93";
60 static char rcsid[] = "$Id: inet_addr.c,v 1.5 1996/08/14 03:48:37 drepper Exp $";
61 #endif /* LIBC_SCCS and not lint */
65 #if !defined (HAVE_INET_ATON) && defined (HAVE_NETWORK) && defined (HAVE_NETINET_IN_H) && defined (HAVE_ARPA_INET_H)
67 #include <sys/types.h>
68 #include <sys/param.h>
69 #include <netinet/in.h>
70 #include <arpa/inet.h>
81 # define INADDR_NONE 0xffffffff
84 /* these are compatibility routines, not needed on recent BSD releases */
87 /* Not used, not needed. */
89 * Ascii internet address interpretation routine.
90 * The value returned is in network order.
94 register const char *cp;
98 if (inet_aton(cp, &val))
100 return (INADDR_NONE);
105 * Check whether "cp" is a valid ascii representation
106 * of an Internet address and convert to a binary address.
107 * Returns 1 if the address is valid, 0 if not.
108 * This replaces inet_addr, the return value from which
109 * cannot distinguish between failure and a local broadcast address.
113 register const char *cp;
114 struct in_addr *addr;
116 register u_bits32_t val;
117 register int base, n;
120 register u_int *pp = parts;
125 * Collect number up to ``.''.
126 * Values are specified as for C:
127 * 0x=hex, 0=octal, isdigit=decimal.
134 if (c == 'x' || c == 'X')
135 base = 16, c = *++cp;
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'));
154 * a.b.c (with c treated as 16 bits)
155 * a.b (with b treated as 24 bits)
165 * Check for trailing characters.
167 if (c != '\0' && (!isascii(c) || !isspace(c)))
170 * Concoct the address according to
171 * the number of parts specified.
177 return (0); /* initial nondigit */
179 case 1: /* a -- 32 bits */
182 case 2: /* a.b -- 8.24 bits */
185 val |= parts[0] << 24;
188 case 3: /* a.b.c -- 8.8.16 bits */
191 val |= (parts[0] << 24) | (parts[1] << 16);
194 case 4: /* a.b.c.d -- 8.8.8.8 bits */
197 val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8);
201 addr->s_addr = htonl(val);
205 #endif /* !HAVE_INET_ATON */