[thirdparty/dhcp.git] / omapip / inet_addr.c

/*	$NetBSD: inet_addr.c,v 1.6 1996/02/02 15:22:23 mrg 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.
 */

#include "dhcpd.h"

#include "omapip/omapip_p.h"

#ifdef NEED_INET_ATON
/* 
 * 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(cp, addr)
	const char *cp;
	struct in_addr *addr;
{
	register u_long val;
	register int base, n;
	register char c;
	u_int parts[4];
	register u_int *pp = parts;

	for (;;) {
		/*
		 * Collect number up to ``.''.
		 * Values are specified as for C:
		 * 0x=hex, 0=octal, other=decimal.
		 */
		val = 0; base = 10;
		if (*cp == '0') {
			if (*++cp == 'x' || *cp == 'X')
				base = 16, cp++;
			else
				base = 8;
		}
		while ((c = *cp) != '\0') {
			if (isascii(c) && isdigit((int)c)) {
				val = (val * base) + (c - '0');
				cp++;
				continue;
			}
			if (base == 16 && isascii(c) && isxdigit((int)c)) {
				val = (val << 4) + 
				      (c + 10 - (islower((int)c) ? 'a' : 'A'));
				cp++;
				continue;
			}
			break;
		}
		if (*cp == '.') {
			/*
			 * 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 > 0xff)
				return (0);
			*pp++ = val, cp++;
		} else
			break;
	}
	/*
	 * Check for trailing characters.
	 */
	if (*cp && (!isascii(*cp) || !isspace((int)*cp)))
		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)
			return (0);
		val |= parts[0] << 24;
		break;

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

	case 4:				/* a.b.c.d -- 8.8.8.8 bits */
		if (val > 0xff)
			return (0);
		val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8);
		break;
	}
	if (addr)
		addr->s_addr = htonl(val);
	return (1);
}
#endif
Commit	Line	Data
1a9c0cc9 TL	1	/* $NetBSD: inet_addr.c,v 1.6 1996/02/02 15:22:23 mrg Exp $ */
	2
	3	/*
	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.
fef8c6f0	15	* 3. Neither the name of the University nor the names of its contributors
1a9c0cc9 TL	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
fe5b0fdd DH	32	#include "dhcpd.h"
fe5b0fdd DH	33
cdb71011	34	#include "omapip/omapip_p.h"
1a9c0cc9 TL	35
	36	#ifdef NEED_INET_ATON
	37	/*
	38	* Check whether "cp" is a valid ascii representation
	39	* of an Internet address and convert to a binary address.
	40	* Returns 1 if the address is valid, 0 if not.
	41	* This replaces inet_addr, the return value from which
	42	* cannot distinguish between failure and a local broadcast address.
	43	*/
	44	int
	45	inet_aton(cp, addr)
c5b0f529	46	const char *cp;
1a9c0cc9 TL	47	struct in_addr *addr;
	48	{
	49	register u_long val;
	50	register int base, n;
	51	register char c;
	52	u_int parts[4];
	53	register u_int *pp = parts;
	54
	55	for (;;) {
	56	/*
	57	* Collect number up to ``.''.
	58	* Values are specified as for C:
	59	* 0x=hex, 0=octal, other=decimal.
	60	*/
	61	val = 0; base = 10;
	62	if (*cp == '0') {
	63	if (++cp == 'x' \|\| cp == 'X')
	64	base = 16, cp++;
	65	else
	66	base = 8;
	67	}
	68	while ((c = *cp) != '\0') {
cff9b78f	69	if (isascii(c) && isdigit((int)c)) {
1a9c0cc9 TL	70	val = (val * base) + (c - '0');
	71	cp++;
	72	continue;
	73	}
cff9b78f	74	if (base == 16 && isascii(c) && isxdigit((int)c)) {
1a9c0cc9	75	val = (val << 4) +
cff9b78f	76	(c + 10 - (islower((int)c) ? 'a' : 'A'));
1a9c0cc9 TL	77	cp++;
	78	continue;
	79	}
	80	break;
	81	}
	82	if (*cp == '.') {
	83	/*
	84	* Internet format:
	85	* a.b.c.d
	86	* a.b.c (with c treated as 16-bits)
	87	* a.b (with b treated as 24 bits)
	88	*/
	89	if (pp >= parts + 3 \|\| val > 0xff)
	90	return (0);
	91	*pp++ = val, cp++;
	92	} else
	93	break;
	94	}
	95	/*
	96	* Check for trailing characters.
	97	*/
cff9b78f	98	if (cp && (!isascii(cp) \|\| !isspace((int)*cp)))
1a9c0cc9 TL	99	return (0);
	100	/*
	101	* Concoct the address according to
	102	* the number of parts specified.
	103	*/
	104	n = pp - parts + 1;
	105	switch (n) {
	106
	107	case 0:
	108	return (0); /* initial nondigit */
	109
	110	case 1: /* a -- 32 bits */
	111	break;
	112
	113	case 2: /* a.b -- 8.24 bits */
	114	if (val > 0xffffff)
	115	return (0);
	116	val \|= parts[0] << 24;
	117	break;
	118
	119	case 3: /* a.b.c -- 8.8.16 bits */
	120	if (val > 0xffff)
	121	return (0);
	122	val \|= (parts[0] << 24) \| (parts[1] << 16);
	123	break;
	124
	125	case 4: /* a.b.c.d -- 8.8.8.8 bits */
	126	if (val > 0xff)
	127	return (0);
	128	val \|= (parts[0] << 24) \| (parts[1] << 16) \| (parts[2] << 8);
	129	break;
	130	}
	131	if (addr)
	132	addr->s_addr = htonl(val);
	133	return (1);
	134	}
	135	#endif