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

/* OPENBSD ORIGINAL: lib/libc/net/inet_addr.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
cdd66111	1	/* OPENBSD ORIGINAL: lib/libc/net/inet_addr.c */
cdd66111	2
0fff78ff	3	/* $OpenBSD: inet_addr.c,v 1.7 2003/06/02 20:18:35 millert Exp $ */
3c0ef626	4
3c0ef626	5	/*
3c0ef626	6	* Copyright (c) 1983, 1990, 1993
	7	* The Regents of the University of California. All rights reserved.
	8	*
	9	* Redistribution and use in source and binary forms, with or without
	10	* modification, are permitted provided that the following conditions
	11	* are met:
	12	* 1. Redistributions of source code must retain the above copyright
	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.
0fff78ff	17	* 3. Neither the name of the University nor the names of its contributors
3c0ef626	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
	32	* -
	33	* Portions Copyright (c) 1993 by Digital Equipment Corporation.
	34	*
	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.
	41	*
	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
	49	* SOFTWARE.
	50	* -
	51	* --Copyright--
	52	*/
	53
700318f3	54	#include "includes.h"
3c0ef626	55
	56	#if !defined(HAVE_INET_ATON)
	57
	58	#if defined(LIBC_SCCS) && !defined(lint)
	59	#if 0
	60	static char sccsid[] = "@(#)inet_addr.c 8.1 (Berkeley) 6/17/93";
	61	static char rcsid[] = "$From: inet_addr.c,v 8.5 1996/08/05 08:31:35 vixie Exp $";
	62	#else
0fff78ff	63	static char rcsid[] = "$OpenBSD: inet_addr.c,v 1.7 2003/06/02 20:18:35 millert Exp $";
3c0ef626	64	#endif
	65	#endif /* LIBC_SCCS and not lint */
	66
	67	#include <sys/types.h>
	68	#include <sys/param.h>
	69	#include <netinet/in.h>
	70	#include <arpa/inet.h>
	71	#include <ctype.h>
	72
	73	#if 0
	74	/*
	75	* Ascii internet address interpretation routine.
	76	* The value returned is in network order.
	77	*/
	78	in_addr_t
	79	inet_addr(cp)
	80	register const char *cp;
	81	{
	82	struct in_addr val;
	83
	84	if (inet_aton(cp, &val))
	85	return (val.s_addr);
	86	return (INADDR_NONE);
	87	}
	88	#endif
	89
	90	/*
	91	* Check whether "cp" is a valid ascii representation
	92	* of an Internet address and convert to a binary address.
	93	* Returns 1 if the address is valid, 0 if not.
	94	* This replaces inet_addr, the return value from which
	95	* cannot distinguish between failure and a local broadcast address.
	96	*/
	97	int
	98	inet_aton(const char cp, struct in_addr addr)
	99	{
	100	register u_int32_t val;
	101	register int base, n;
	102	register char c;
	103	unsigned int parts[4];
	104	register unsigned int *pp = parts;
	105
	106	c = *cp;
	107	for (;;) {
	108	/*
	109	* Collect number up to ``.''.
	110	* Values are specified as for C:
	111	* 0x=hex, 0=octal, isdigit=decimal.
	112	*/
	113	if (!isdigit(c))
	114	return (0);
	115	val = 0; base = 10;
	116	if (c == '0') {
	117	c = *++cp;
	118	if (c == 'x' \|\| c == 'X')
	119	base = 16, c = *++cp;
	120	else
	121	base = 8;
	122	}
	123	for (;;) {
	124	if (isascii(c) && isdigit(c)) {
	125	val = (val * base) + (c - '0');
	126	c = *++cp;
	127	} else if (base == 16 && isascii(c) && isxdigit(c)) {
128	val = (val << 4) \|
129	(c + 10 - (islower(c) ? 'a' : 'A'));
130	c = *++cp;
131	} else
132	break;
133	}
134	if (c == '.') {
135	/*
136	* Internet format:
137	* a.b.c.d
138	* a.b.c (with c treated as 16 bits)
139	* a.b (with b treated as 24 bits)
140	*/
141	if (pp >= parts + 3)
142	return (0);
143	*pp++ = val;
144	c = *++cp;
145	} else
146	break;
147	}
148	/*
149	* Check for trailing characters.
150	*/
151	if (c != '\0' && (!isascii(c) \|\| !isspace(c)))
152	return (0);
153	/*
154	* Concoct the address according to
155	* the number of parts specified.
156	*/
157	n = pp - parts + 1;
158	switch (n) {
159
160	case 0:
161	return (0); /* initial nondigit */
162
163	case 1: /* a -- 32 bits */
164	break;
165
166	case 2: /* a.b -- 8.24 bits */
167	if ((val > 0xffffff) \|\| (parts[0] > 0xff))
168	return (0);
169	val \|= parts[0] << 24;
170	break;
171
172	case 3: /* a.b.c -- 8.8.16 bits */
173	if ((val > 0xffff) \|\| (parts[0] > 0xff) \|\| (parts[1] > 0xff))
174	return (0);
175	val \|= (parts[0] << 24) \| (parts[1] << 16);
176	break;
177
178	case 4: /* a.b.c.d -- 8.8.8.8 bits */
179	if ((val > 0xff) \|\| (parts[0] > 0xff) \|\| (parts[1] > 0xff) \|\| (parts[2] > 0xff))
180	return (0);
181	val \|= (parts[0] << 24) \| (parts[1] << 16) \| (parts[2] << 8);
182	break;
183	}
184	if (addr)
185	addr->s_addr = htonl(val);
186	return (1);
187	}
188
189	#endif /* !defined(HAVE_INET_ATON) */