[openssh.git] / openbsd-compat / inet_aton.c

/*	$OpenBSD: inet_addr.c,v 1.9 2005/08/06 20:30:03 espie Exp $	*/

/*
 * 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.
 * 3. 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--
 */

/* OPENBSD ORIGINAL: lib/libc/net/inet_addr.c */

#include "includes.h"

#if !defined(HAVE_INET_ATON)

#include <sys/types.h>
#include <sys/param.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <ctype.h>

#if 0
/*
 * Ascii internet address interpretation routine.
 * The value returned is in network order.
 */
in_addr_t
inet_addr(const char *cp)
{
	struct in_addr val;

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

/* 
 * 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.
 */
int
inet_aton(const char *cp, struct in_addr *addr)
{
	u_int32_t val;
	int base, n;
	char c;
	u_int parts[4];
	u_int *pp = parts;

	c = *cp;
	for (;;) {
		/*
		 * Collect number up to ``.''.
		 * Values are specified as for C:
		 * 0x=hex, 0=octal, isdigit=decimal.
		 */
		if (!isdigit(c))
			return (0);
		val = 0; base = 10;
		if (c == '0') {
			c = *++cp;
			if (c == 'x' || c == 'X')
				base = 16, c = *++cp;
			else
				base = 8;
		}
		for (;;) {
			if (isascii(c) && isdigit(c)) {
				val = (val * base) + (c - '0');
				c = *++cp;
			} else if (base == 16 && isascii(c) && isxdigit(c)) {
				val = (val << 4) |
					(c + 10 - (islower(c) ? 'a' : 'A'));
				c = *++cp;
			} 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)
				return (0);
			*pp++ = val;
			c = *++cp;
		} else
			break;
	}
	/*
	 * Check for trailing characters.
	 */
	if (c != '\0' && (!isascii(c) || !isspace(c)))
		return (0);
	/*
	 * Concoct the address according to
	 * the number of parts specified.
	 */
	n = pp - parts + 1;
	switch (n) {

	case 0:
		return (0);		/* initial nondigit */

	case 1:				/* a -- 32 bits */
		break;

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

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

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

#endif /* !defined(HAVE_INET_ATON) */
Commit	Line	Data
b53df919	1	/* $OpenBSD: inet_addr.c,v 1.9 2005/08/06 20:30:03 espie Exp $ */
c14e6239	2
c14e6239	3	/*
c14e6239	4	* Copyright (c) 1983, 1990, 1993
	5	* The Regents of the University of California. All rights reserved.
	6	*
	7	* Redistribution and use in source and binary forms, with or without
	8	* modification, are permitted provided that the following conditions
	9	* are met:
	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.
3e67f7df	15	* 3. Neither the name of the University nor the names of its contributors
c14e6239	16	* may be used to endorse or promote products derived from this software
	17	* without specific prior written permission.
	18	*
	19	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	20	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	21	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	22	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	23	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	24	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	25	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	26	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	27	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	28	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	29	* SUCH DAMAGE.
	30	* -
	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.
	48	* -
	49	* --Copyright--
	50	*/
	51
f6d4fb87	52	/* OPENBSD ORIGINAL: lib/libc/net/inet_addr.c */
f6d4fb87	53
7b0737a4	54	#include "includes.h"
c14e6239	55
	56	#if !defined(HAVE_INET_ATON)
	57
c14e6239	58	#include <sys/types.h>
	59	#include <sys/param.h>
	60	#include <netinet/in.h>
	61	#include <arpa/inet.h>
	62	#include <ctype.h>
	63
	64	#if 0
	65	/*
	66	* Ascii internet address interpretation routine.
	67	* The value returned is in network order.
	68	*/
	69	in_addr_t
b53df919	70	inet_addr(const char *cp)
c14e6239	71	{
	72	struct in_addr val;
	73
	74	if (inet_aton(cp, &val))
	75	return (val.s_addr);
	76	return (INADDR_NONE);
	77	}
	78	#endif
	79
	80	/*
	81	* Check whether "cp" is a valid ascii representation
	82	* of an Internet address and convert to a binary address.
	83	* Returns 1 if the address is valid, 0 if not.
	84	* This replaces inet_addr, the return value from which
	85	* cannot distinguish between failure and a local broadcast address.
	86	*/
	87	int
	88	inet_aton(const char cp, struct in_addr addr)
	89	{
b53df919	90	u_int32_t val;
	91	int base, n;
	92	char c;
	93	u_int parts[4];
	94	u_int *pp = parts;
c14e6239	95
	96	c = *cp;
	97	for (;;) {
	98	/*
	99	* Collect number up to ``.''.
	100	* Values are specified as for C:
	101	* 0x=hex, 0=octal, isdigit=decimal.
	102	*/
	103	if (!isdigit(c))
	104	return (0);
	105	val = 0; base = 10;
	106	if (c == '0') {
	107	c = *++cp;
	108	if (c == 'x' \|\| c == 'X')
	109	base = 16, c = *++cp;
	110	else
	111	base = 8;
	112	}
	113	for (;;) {
	114	if (isascii(c) && isdigit(c)) {
	115	val = (val * base) + (c - '0');
	116	c = *++cp;
	117	} else if (base == 16 && isascii(c) && isxdigit(c)) {
	118	val = (val << 4) \|
	119	(c + 10 - (islower(c) ? 'a' : 'A'));
	120	c = *++cp;
	121	} else
	122	break;
	123	}
	124	if (c == '.') {
	125	/*
	126	* Internet format:
	127	* a.b.c.d
	128	* a.b.c (with c treated as 16 bits)
	129	* a.b (with b treated as 24 bits)
	130	*/
	131	if (pp >= parts + 3)
	132	return (0);
	133	*pp++ = val;
	134	c = *++cp;
	135	} else
	136	break;
	137	}
	138	/*
	139	* Check for trailing characters.
	140	*/
	141	if (c != '\0' && (!isascii(c) \|\| !isspace(c)))
	142	return (0);
	143	/*
	144	* Concoct the address according to
	145	* the number of parts specified.
	146	*/
	147	n = pp - parts + 1;
	148	switch (n) {
	149
	150	case 0:
	151	return (0); /* initial nondigit */
	152
	153	case 1: /* a -- 32 bits */
	154	break;
	155
	156	case 2: /* a.b -- 8.24 bits */
	157	if ((val > 0xffffff) \|\| (parts[0] > 0xff))
	158	return (0);
159	val \|= parts[0] << 24;
160	break;
161
162	case 3: /* a.b.c -- 8.8.16 bits */
163	if ((val > 0xffff) \|\| (parts[0] > 0xff) \|\| (parts[1] > 0xff))
164	return (0);
165	val \|= (parts[0] << 24) \| (parts[1] << 16);
166	break;
167
168	case 4: /* a.b.c.d -- 8.8.8.8 bits */
169	if ((val > 0xff) \|\| (parts[0] > 0xff) \|\| (parts[1] > 0xff) \|\| (parts[2] > 0xff))
170	return (0);
171	val \|= (parts[0] << 24) \| (parts[1] << 16) \| (parts[2] << 8);
172	break;
173	}
174	if (addr)
175	addr->s_addr = htonl(val);
176	return (1);
177	}
178
179	#endif /* !defined(HAVE_INET_ATON) */