/*	$KAME: inet_addr.c,v 1.5 2001/08/20 02:32:40 itojun Exp $	*/

/*

 * ++Copyright++ 1983, 1990, 1993

 * -

 * 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.

 * -

 *   * Portions Copyright (c) 2006-2007 Nokia Corporation and/or its subsidiary(-ies). All rights reserved. 

 * --Copyright--

 */

#if defined(LIBC_SCCS) && !defined(lint)

static char sccsid[] = "@(#)inet_addr.c	8.1 (Berkeley) 6/17/93";

#endif /* LIBC_SCCS and not lint */

#include <sys/cdefs.h>

#ifndef __SYMBIAN32__

__FBSDID("$FreeBSD: src/lib/libc/net/inet_addr.c,v 1.16 2002/04/19 04:46:20 suz Exp $");

#endif//__SYMBIAN32__

#include <sys/param.h>

#include <stdapis/netinet/in.h>

#include <stdapis/arpa/inet.h>

#include <ctype.h>

#include <errno.h>

#include <string.h>

#include <stdlib.h>

/*

 * ASCII internet address interpretation routine.

 * The value returned is in network order.

 */

EXPORT_C in_addr_t		/* XXX should be struct in_addr :( */

inet_addr(cp)

	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.

 */

EXPORT_C int

inet_aton(cp, addr)

	const char *cp;

	struct in_addr *addr;

{

	u_long parts[4];

	in_addr_t val;

	char *c;

	char *endptr;

	int gotend, n;

	c = (char *)cp;

	n = 0;

	/*

	 * Run through the string, grabbing numbers until

	 * the end of the string, or some error

	 */

	gotend = 0;

	while (!gotend) {

		errno = 0;

		val = strtoul(c, &endptr, 0);

		if (errno == ERANGE)	/* Fail completely if it overflowed. */

			return (0);

		/* 

		 * If the whole string is invalid, endptr will equal

		 * c.. this way we can make sure someone hasn't

		 * gone '.12' or something which would get past

		 * the next check.

		 */

		if (endptr == c)

			return (0);

		parts[n] = val;

		c = endptr;

		/* Check the next character past the previous number's end */

		switch (*c) {

		case '.' :

			/* Make sure we only do 3 dots .. */

			if (n == 3)	/* Whoops. Quit. */

				return (0);

			n++;

			c++;

			break;

		case '\0':

			gotend = 1;

			break;

		default:

			if (isspace((unsigned char)*c)) {

				gotend = 1;

				break;

			} else

				return (0);	/* Invalid character, so fail */

		}

	}

	/*

	 * Concoct the address according to

	 * the number of parts specified.

	 */

	switch (n) {

	case 0:				/* a -- 32 bits */

		/*

		 * Nothing is necessary here.  Overflow checking was

		 * already done in strtoul().

		 */

		break;

	case 1:				/* a.b -- 8.24 bits */

		if (val > 0xffffff || parts[0] > 0xff)

			return (0);

		val |= parts[0] << 24;

		break;

	case 2:				/* 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 3:				/* 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 != NULL)

		addr->s_addr = htonl(val);

	return (1);

}

/*

 * Weak aliases for applications that use certain private entry points,

 * and fail to include <arpa/inet.h>.

 */

#ifndef __SYMBIAN32__

#undef inet_addr

__weak_reference(__inet_addr, inet_addr);

#undef inet_aton

__weak_reference(__inet_aton, inet_aton);

#else

#define inet_addr __inet_addr

#define inet_aton __inet_aton

#endif//__SYMBIAN32__