[apple/libc.git] / net / FreeBSD / inet_addr.c

/*
 * Copyright (c) 1983, 1990, 1993
 *    The Regents of the University of California.  All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

/*
 * Portions Copyright (c) 1993 by Digital Equipment Corporation.
 * 
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies, and that
 * the name of Digital Equipment Corporation not be used in advertising or
 * publicity pertaining to distribution of the document or software without
 * specific, written prior permission.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS.   IN NO EVENT SHALL DIGITAL EQUIPMENT
 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
 * SOFTWARE.
 */

/*
 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
 * Portions Copyright (c) 1996-1999 by Internet Software Consortium.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#if defined(LIBC_SCCS) && !defined(lint)
static const char sccsid[] = "@(#)inet_addr.c	8.1 (Berkeley) 6/17/93";
static const char rcsid[] = "$Id: inet_addr.c,v 1.4.18.1 2005/04/27 05:00:52 sra Exp $";
#endif /* LIBC_SCCS and not lint */

/* the algorithms only can deal with ASCII, so we optimize for it */
#define USE_ASCII

#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/lib/libc/inet/inet_addr.c,v 1.4 2007/06/03 17:20:26 ume Exp $");

#include "port_before.h"

#include <sys/types.h>
#include <sys/param.h>

#include <netinet/in.h>
#include <arpa/inet.h>

#include <ctype.h>

#include "port_after.h"

/*%
 * Ascii internet address interpretation routine.
 * The value returned is in network order.
 */
in_addr_t		/* XXX should be struct in_addr :( */
inet_addr(const char *cp) {
	struct in_addr val;

	if (inet_aton(cp, &val))
		return (val.s_addr);
	return (INADDR_NONE);
}

/*%
 * Check whether "cp" is a valid ascii representation
 * of an Internet address and convert to a binary address.
 * Returns 1 if the address is valid, 0 if not.
 * This replaces inet_addr, the return value from which
 * cannot distinguish between failure and a local broadcast address.
 * strict == 1 disallows trailing characters.
 */
int
_inet_aton_check(const char *cp, struct in_addr *addr, int strict)
{
	u_long val;
	int base, n;
	char c;
	u_int8_t parts[4];
	u_int8_t *pp = parts;
	int digit;

	c = *cp;
	for (;;) {
		/*
		 * Collect number up to ``.''.
		 * Values are specified as for C:
		 * 0x=hex, 0=octal, isdigit=decimal.
		 */
		if (!isdigit((unsigned char)c))
			return (0);
		val = 0; base = 10; digit = 0;
		if (c == '0') {
			c = *++cp;
			if (c == 'x' || c == 'X')
				base = 16, c = *++cp;
			else {
				base = 8;
				digit = 1 ;
			}
		}
		for (;;) {
			if (isascii(c) && isdigit((unsigned char)c)) {
				if (base == 8 && (c == '8' || c == '9'))
					return (0);
				val = (val * base) + (c - '0');
				c = *++cp;
				digit = 1;
			} else if (base == 16 && isascii(c) && 
				   isxdigit((unsigned char)c)) {
				val = (val << 4) |
					(c + 10 - (islower((unsigned char)c) ? 'a' : 'A'));
				c = *++cp;
				digit = 1;
			} else
				break;
		}
		if (c == '.') {
			/*
			 * Internet format:
			 *	a.b.c.d
			 *	a.b.c	(with c treated as 16 bits)
			 *	a.b	(with b treated as 24 bits)
			 */
			if (pp >= parts + 3 || val > 0xffU)
				return (0);
			*pp++ = val;
			c = *++cp;
		} else
			break;
	}
	/*
	 * Check for trailing characters.
	 */
	if (c != '\0') {
		if (strict) return (0);
		if (!isascii(c) || !isspace(c)) return (0);
	}
	/*
	 * Did we get a valid digit?
	 */
	if (!digit)
		return (0);
	/*
	 * Concoct the address according to
	 * the number of parts specified.
	 */
	n = pp - parts + 1;
	switch (n) {
	case 1:				/*%< a -- 32 bits */
		break;

	case 2:				/*%< a.b -- 8.24 bits */
		if (val > 0xffffffU)
			return (0);
		val |= parts[0] << 24;
		break;

	case 3:				/*%< a.b.c -- 8.8.16 bits */
		if (val > 0xffffU)
			return (0);
		val |= (parts[0] << 24) | (parts[1] << 16);
		break;

	case 4:				/*%< a.b.c.d -- 8.8.8.8 bits */
		if (val > 0xffU)
			return (0);
		val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8);
		break;
	}
	if (addr != NULL)
		addr->s_addr = htonl(val);
	return (1);
}

int
inet_aton(const char *cp, struct in_addr *addr)
{
	return _inet_aton_check(cp, addr, 0);
}

/*
 * Weak aliases for applications that use certain private entry points,
 * and fail to include <arpa/inet.h>.
 */
#undef inet_addr
__weak_reference(__inet_addr, inet_addr);
#undef inet_aton
__weak_reference(__inet_aton, inet_aton);

/*! \file */
Commit	Line	Data
e9ce8d39	1	/*
e9ce8d39	2	* Copyright (c) 1983, 1990, 1993
9385eb3d A	3	* The Regents of the University of California. All rights reserved.
9385eb3d A	4	*
e9ce8d39 A	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	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.
e9ce8d39 A	13	* 4. Neither the name of the University nor the names of its contributors
	14	* may be used to endorse or promote products derived from this software
	15	* without specific prior written permission.
9385eb3d	16	*
e9ce8d39 A	17	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	18	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	19	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	20	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	21	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	22	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	23	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	24	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	25	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	26	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	27	* SUCH DAMAGE.
34e8f829 A	28	*/
	29
	30	/*
9385eb3d A	31	* Portions Copyright (c) 1993 by Digital Equipment Corporation.
	32	*
	33	* Permission to use, copy, modify, and distribute this software for any
	34	* purpose with or without fee is hereby granted, provided that the above
	35	* copyright notice and this permission notice appear in all copies, and that
	36	* the name of Digital Equipment Corporation not be used in advertising or
	37	* publicity pertaining to distribution of the document or software without
	38	* specific, written prior permission.
	39	*
	40	* THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
	41	* WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
	42	* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
	43	* CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
	44	* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
	45	* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
	46	* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
	47	* SOFTWARE.
34e8f829 A	48	*/
	49
	50	/*
	51	* Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
	52	* Portions Copyright (c) 1996-1999 by Internet Software Consortium.
	53	*
	54	* Permission to use, copy, modify, and distribute this software for any
	55	* purpose with or without fee is hereby granted, provided that the above
	56	* copyright notice and this permission notice appear in all copies.
	57	*
	58	* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
	59	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	60	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
	61	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	62	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
	63	* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
	64	* OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
e9ce8d39 A	65	*/
e9ce8d39 A	66
9385eb3d	67	#if defined(LIBC_SCCS) && !defined(lint)
34e8f829 A	68	static const char sccsid[] = "@(#)inet_addr.c 8.1 (Berkeley) 6/17/93";
34e8f829 A	69	static const char rcsid[] = "$Id: inet_addr.c,v 1.4.18.1 2005/04/27 05:00:52 sra Exp $";
9385eb3d	70	#endif /* LIBC_SCCS and not lint */
ad3c9f2a A	71
	72	/* the algorithms only can deal with ASCII, so we optimize for it */
	73	#define USE_ASCII
	74
9385eb3d	75	#include <sys/cdefs.h>
34e8f829 A	76	__FBSDID("$FreeBSD: src/lib/libc/inet/inet_addr.c,v 1.4 2007/06/03 17:20:26 ume Exp $");
	77
	78	#include "port_before.h"
e9ce8d39	79
34e8f829	80	#include <sys/types.h>
e9ce8d39	81	#include <sys/param.h>
9385eb3d	82
e9ce8d39 A	83	#include <netinet/in.h>
e9ce8d39 A	84	#include <arpa/inet.h>
9385eb3d	85
e9ce8d39 A	86	#include <ctype.h>
e9ce8d39 A	87
34e8f829 A	88	#include "port_after.h"
	89
	90	/*%
	91	* Ascii internet address interpretation routine.
e9ce8d39 A	92	* The value returned is in network order.
e9ce8d39 A	93	*/
9385eb3d	94	in_addr_t /* XXX should be struct in_addr :( */
34e8f829	95	inet_addr(const char *cp) {
e9ce8d39 A	96	struct in_addr val;
	97
	98	if (inet_aton(cp, &val))
	99	return (val.s_addr);
	100	return (INADDR_NONE);
	101	}
	102
34e8f829 A	103	/*%
34e8f829 A	104	* Check whether "cp" is a valid ascii representation
e9ce8d39 A	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.
ad3c9f2a	109	* strict == 1 disallows trailing characters.
e9ce8d39 A	110	*/
e9ce8d39 A	111	int
ad3c9f2a A	112	_inet_aton_check(const char cp, struct in_addr addr, int strict)
ad3c9f2a A	113	{
34e8f829 A	114	u_long val;
	115	int base, n;
	116	char c;
	117	u_int8_t parts[4];
	118	u_int8_t *pp = parts;
	119	int digit;
	120
	121	c = *cp;
	122	for (;;) {
	123	/*
	124	* Collect number up to ``.''.
	125	* Values are specified as for C:
	126	* 0x=hex, 0=octal, isdigit=decimal.
e9ce8d39	127	*/
34e8f829	128	if (!isdigit((unsigned char)c))
5b2abdfb	129	return (0);
34e8f829 A	130	val = 0; base = 10; digit = 0;
	131	if (c == '0') {
	132	c = *++cp;
	133	if (c == 'x' \|\| c == 'X')
	134	base = 16, c = *++cp;
	135	else {
	136	base = 8;
	137	digit = 1 ;
	138	}
	139	}
	140	for (;;) {
	141	if (isascii(c) && isdigit((unsigned char)c)) {
	142	if (base == 8 && (c == '8' \|\| c == '9'))
	143	return (0);
	144	val = (val * base) + (c - '0');
	145	c = *++cp;
	146	digit = 1;
	147	} else if (base == 16 && isascii(c) &&
	148	isxdigit((unsigned char)c)) {
	149	val = (val << 4) \|
	150	(c + 10 - (islower((unsigned char)c) ? 'a' : 'A'));
	151	c = *++cp;
	152	digit = 1;
5b2abdfb	153	} else
34e8f829	154	break;
5b2abdfb	155	}
34e8f829 A	156	if (c == '.') {
	157	/*
	158	* Internet format:
	159	* a.b.c.d
	160	* a.b.c (with c treated as 16 bits)
	161	* a.b (with b treated as 24 bits)
	162	*/
	163	if (pp >= parts + 3 \|\| val > 0xffU)
	164	return (0);
	165	*pp++ = val;
	166	c = *++cp;
	167	} else
	168	break;
e9ce8d39	169	}
34e8f829 A	170	/*
	171	* Check for trailing characters.
	172	*/
ad3c9f2a A	173	if (c != '\0') {
	174	if (strict) return (0);
	175	if (!isascii(c) \|\| !isspace(c)) return (0);
	176	}
34e8f829 A	177	/*
	178	* Did we get a valid digit?
	179	*/
	180	if (!digit)
	181	return (0);
e9ce8d39 A	182	/*
	183	* Concoct the address according to
	184	* the number of parts specified.
	185	*/
34e8f829	186	n = pp - parts + 1;
5b2abdfb	187	switch (n) {
34e8f829	188	case 1: /%< a -- 32 bits /
e9ce8d39	189	break;
34e8f829 A	190
	191	case 2: /%< a.b -- 8.24 bits /
	192	if (val > 0xffffffU)
e9ce8d39 A	193	return (0);
	194	val \|= parts[0] << 24;
	195	break;
	196
34e8f829 A	197	case 3: /%< a.b.c -- 8.8.16 bits /
34e8f829 A	198	if (val > 0xffffU)
e9ce8d39 A	199	return (0);
	200	val \|= (parts[0] << 24) \| (parts[1] << 16);
	201	break;
	202
34e8f829 A	203	case 4: /%< a.b.c.d -- 8.8.8.8 bits /
34e8f829 A	204	if (val > 0xffU)
e9ce8d39 A	205	return (0);
	206	val \|= (parts[0] << 24) \| (parts[1] << 16) \| (parts[2] << 8);
	207	break;
	208	}
5b2abdfb	209	if (addr != NULL)
e9ce8d39 A	210	addr->s_addr = htonl(val);
	211	return (1);
	212	}
9385eb3d	213
ad3c9f2a A	214	int
	215	inet_aton(const char cp, struct in_addr addr)
	216	{
	217	return _inet_aton_check(cp, addr, 0);
	218	}
	219
9385eb3d A	220	/*
	221	* Weak aliases for applications that use certain private entry points,
	222	* and fail to include <arpa/inet.h>.
	223	*/
	224	#undef inet_addr
	225	__weak_reference(__inet_addr, inet_addr);
	226	#undef inet_aton
	227	__weak_reference(__inet_aton, inet_aton);
34e8f829 A	228
34e8f829 A	229	/! \file /