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4 * Copyright (c) 1983, 1990, 1993
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8 * modification, are permitted provided that the following conditions
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33 * Portions Copyright (c) 1993 by Digital Equipment Corporation.
35 * Permission to use, copy, modify, and distribute this software for any
36 * purpose with or without fee is hereby granted, provided that the above
37 * copyright notice and this permission notice appear in all copies, and that
38 * the name of Digital Equipment Corporation not be used in advertising or
39 * publicity pertaining to distribution of the document or software without
40 * specific, written prior permission.
42 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
43 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
44 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
45 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
46 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
47 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
48 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
53 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
54 * Portions Copyright (c) 1996-1999 by Internet Software Consortium.
56 * Permission to use, copy, modify, and distribute this software for any
57 * purpose with or without fee is hereby granted, provided that the above
58 * copyright notice and this permission notice appear in all copies.
60 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
61 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
62 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
63 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
64 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
65 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
66 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
69 #if defined(LIBC_SCCS) && !defined(lint)
70 static const char sccsid[] = "@(#)inet_addr.c 8.1 (Berkeley) 6/17/93";
71 static const char rcsid[] = "$Id: inet_addr.c,v 1.5 2005/04/27 04:56:19 sra Exp $";
72 #endif /* LIBC_SCCS and not lint */
73 #include <sys/cdefs.h>
74 __FBSDID("$FreeBSD$");
76 #include "port_before.h"
78 #include <sys/param.h>
80 #include <netinet/in.h>
81 #include <arpa/inet.h>
85 #include "port_after.h"
88 * Ascii internet address interpretation routine.
89 * The value returned is in network order.
91 in_addr_t /* XXX should be struct in_addr :( */
92 inet_addr(const char *cp) {
95 if (inet_aton(cp, &val))
101 * Check whether "cp" is a valid ascii representation
102 * of an Internet address and convert to a binary address.
103 * Returns 1 if the address is valid, 0 if not.
104 * This replaces inet_addr, the return value from which
105 * cannot distinguish between failure and a local broadcast address.
108 inet_aton(const char *cp, struct in_addr *addr) {
113 u_int8_t *pp = parts;
119 * Collect number up to ``.''.
120 * Values are specified as for C:
121 * 0x=hex, 0=octal, isdigit=decimal.
123 if (!isdigit((unsigned char)c))
125 val = 0; base = 10; digit = 0;
128 if (c == 'x' || c == 'X')
129 base = 16, c = *++cp;
136 if (isascii(c) && isdigit((unsigned char)c)) {
137 if (base == 8 && (c == '8' || c == '9'))
139 val = (val * base) + (c - '0');
142 } else if (base == 16 && isascii(c) &&
143 isxdigit((unsigned char)c)) {
145 (c + 10 - (islower((unsigned char)c) ? 'a' : 'A'));
155 * a.b.c (with c treated as 16 bits)
156 * a.b (with b treated as 24 bits)
158 if (pp >= parts + 3 || val > 0xffU)
166 * Check for trailing characters.
168 if (c != '\0' && (!isascii(c) || !isspace((unsigned char)c)))
171 * Did we get a valid digit?
176 * Concoct the address according to
177 * the number of parts specified.
181 case 1: /*%< a -- 32 bits */
184 case 2: /*%< a.b -- 8.24 bits */
187 val |= (uint32_t)parts[0] << 24;
190 case 3: /*%< a.b.c -- 8.8.16 bits */
193 val |= ((uint32_t)parts[0] << 24) | (parts[1] << 16);
196 case 4: /*%< a.b.c.d -- 8.8.8.8 bits */
199 val |= ((uint32_t)parts[0] << 24) | (parts[1] << 16) |
204 addr->s_addr = htonl(val);
209 * Weak aliases for applications that use certain private entry points,
210 * and fail to include <arpa/inet.h>.
213 __weak_reference(__inet_addr, inet_addr);
215 __weak_reference(__inet_aton, inet_aton);