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

/*	$OpenBSD: inet_addr.c,v 1.7 2003/06/02 20:18:35 millert 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--
 */

#include "includes.h"

#if !defined(HAVE_INET_ATON)

#if defined(LIBC_SCCS) && !defined(lint)
#if 0
static char sccsid[] = "@(#)inet_addr.c	8.1 (Berkeley) 6/17/93";
static char rcsid[] = "$From: inet_addr.c,v 8.5 1996/08/05 08:31:35 vixie Exp $";
#else
static char rcsid[] = "$OpenBSD: inet_addr.c,v 1.7 2003/06/02 20:18:35 millert Exp $";
#endif
#endif /* LIBC_SCCS and not lint */

#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(cp)
	register 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)
{
	register u_int32_t val;
	register int base, n;
	register char c;
	unsigned int parts[4];
	register unsigned 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
0fff78ff	1	/* $OpenBSD: inet_addr.c,v 1.7 2003/06/02 20:18:35 millert Exp $ */
3c0ef626	2
3c0ef626	3	/*
3c0ef626	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.
0fff78ff	15	* 3. Neither the name of the University nor the names of its contributors
3c0ef626	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
700318f3	52	#include "includes.h"
3c0ef626	53
	54	#if !defined(HAVE_INET_ATON)
	55
	56	#if defined(LIBC_SCCS) && !defined(lint)
	57	#if 0
	58	static char sccsid[] = "@(#)inet_addr.c 8.1 (Berkeley) 6/17/93";
	59	static char rcsid[] = "$From: inet_addr.c,v 8.5 1996/08/05 08:31:35 vixie Exp $";
	60	#else
0fff78ff	61	static char rcsid[] = "$OpenBSD: inet_addr.c,v 1.7 2003/06/02 20:18:35 millert Exp $";
3c0ef626	62	#endif
	63	#endif /* LIBC_SCCS and not lint */
	64
	65	#include <sys/types.h>
	66	#include <sys/param.h>
	67	#include <netinet/in.h>
	68	#include <arpa/inet.h>
	69	#include <ctype.h>
	70
	71	#if 0
	72	/*
	73	* Ascii internet address interpretation routine.
	74	* The value returned is in network order.
	75	*/
	76	in_addr_t
	77	inet_addr(cp)
	78	register const char *cp;
	79	{
	80	struct in_addr val;
	81
	82	if (inet_aton(cp, &val))
	83	return (val.s_addr);
	84	return (INADDR_NONE);
	85	}
	86	#endif
	87
	88	/*
	89	* Check whether "cp" is a valid ascii representation
	90	* of an Internet address and convert to a binary address.
	91	* Returns 1 if the address is valid, 0 if not.
	92	* This replaces inet_addr, the return value from which
	93	* cannot distinguish between failure and a local broadcast address.
	94	*/
	95	int
	96	inet_aton(const char cp, struct in_addr addr)
	97	{
	98	register u_int32_t val;
	99	register int base, n;
	100	register char c;
	101	unsigned int parts[4];
	102	register unsigned int *pp = parts;
	103
	104	c = *cp;
	105	for (;;) {
	106	/*
	107	* Collect number up to ``.''.
	108	* Values are specified as for C:
	109	* 0x=hex, 0=octal, isdigit=decimal.
	110	*/
	111	if (!isdigit(c))
	112	return (0);
	113	val = 0; base = 10;
	114	if (c == '0') {
	115	c = *++cp;
	116	if (c == 'x' \|\| c == 'X')
	117	base = 16, c = *++cp;
	118	else
	119	base = 8;
	120	}
	121	for (;;) {
	122	if (isascii(c) && isdigit(c)) {
	123	val = (val * base) + (c - '0');
	124	c = *++cp;
	125	} else if (base == 16 && isascii(c) && isxdigit(c)) {
126	val = (val << 4) \|
127	(c + 10 - (islower(c) ? 'a' : 'A'));
128	c = *++cp;
129	} else
130	break;
131	}
132	if (c == '.') {
133	/*
134	* Internet format:
135	* a.b.c.d
136	* a.b.c (with c treated as 16 bits)
137	* a.b (with b treated as 24 bits)
138	*/
139	if (pp >= parts + 3)
140	return (0);
141	*pp++ = val;
142	c = *++cp;
143	} else
144	break;
145	}
146	/*
147	* Check for trailing characters.
148	*/
149	if (c != '\0' && (!isascii(c) \|\| !isspace(c)))
150	return (0);
151	/*
152	* Concoct the address according to
153	* the number of parts specified.
154	*/
155	n = pp - parts + 1;
156	switch (n) {
157
158	case 0:
159	return (0); /* initial nondigit */
160
161	case 1: /* a -- 32 bits */
162	break;
163
164	case 2: /* a.b -- 8.24 bits */
165	if ((val > 0xffffff) \|\| (parts[0] > 0xff))
166	return (0);
167	val \|= parts[0] << 24;
168	break;
169
170	case 3: /* a.b.c -- 8.8.16 bits */
171	if ((val > 0xffff) \|\| (parts[0] > 0xff) \|\| (parts[1] > 0xff))
172	return (0);
173	val \|= (parts[0] << 24) \| (parts[1] << 16);
174	break;
175
176	case 4: /* a.b.c.d -- 8.8.8.8 bits */
177	if ((val > 0xff) \|\| (parts[0] > 0xff) \|\| (parts[1] > 0xff) \|\| (parts[2] > 0xff))
178	return (0);
179	val \|= (parts[0] << 24) \| (parts[1] << 16) \| (parts[2] << 8);
180	break;
181	}
182	if (addr)
183	addr->s_addr = htonl(val);
184	return (1);
185	}
186
187	#endif /* !defined(HAVE_INET_ATON) */