[apple/libc.git] / net / FreeBSD / inet_network.c

/*
 * Copyright (c) 1983, 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.
 */

#if defined(LIBC_SCCS) && !defined(lint)
static const char sccsid[] = "@(#)inet_network.c	8.1 (Berkeley) 6/4/93";
#endif /* LIBC_SCCS and not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/lib/libc/inet/inet_network.c,v 1.5 2008/01/14 22:55:20 cperciva Exp $");

#include "port_before.h"

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

#include "port_after.h"

/*%
 * Internet network address interpretation routine.
 * The library routines call this routine to interpret
 * network numbers.
 */
in_addr_t
inet_network(cp)
	const char *cp;
{
	in_addr_t val, base, n;
	char c;
	in_addr_t parts[4], *pp = parts;
	int i, digit;

again:
	val = 0; base = 10; digit = 0;
	if (*cp == '0')
		digit = 1, base = 8, cp++;
	if (*cp == 'x' || *cp == 'X')
		base = 16, cp++;
	while ((c = *cp) != 0) {
		if (isdigit((unsigned char)c)) {
			if (base == 8U && (c == '8' || c == '9'))
				return (INADDR_NONE);
			val = (val * base) + (c - '0');
			cp++;
			digit = 1;
			continue;
		}
		if (base == 16U && isxdigit((unsigned char)c)) {
			val = (val << 4) +
			      (c + 10 - (islower((unsigned char)c) ? 'a' : 'A'));
			cp++;
			digit = 1;
			continue;
		}
		break;
	}
	if (!digit)
		return (INADDR_NONE);
	if (pp >= parts + 4 || val > 0xffU)
		return (INADDR_NONE);
	if (*cp == '.') {
		*pp++ = val, cp++;
		goto again;
	}
	if (*cp && !isspace(*cp&0xff))
		return (INADDR_NONE);
	*pp++ = val;
	n = pp - parts;
	if (n > 4U)
		return (INADDR_NONE);
	for (val = 0, i = 0; i < n; i++) {
		val <<= 8;
		val |= parts[i] & 0xff;
	}
	return (val);
}

/*
 * Weak aliases for applications that use certain private entry points,
 * and fail to include <arpa/inet.h>.
 */
#undef inet_network
__weak_reference(__inet_network, inet_network);

/*! \file */
Commit	Line	Data
e9ce8d39 A	1	/*
	2	* Copyright (c) 1983, 1993
	3	* The Regents of the University of California. All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
e9ce8d39 A	13	* 4. Neither the name of the University nor the names of its contributors
	14	* may be used to endorse or promote products derived from this software
	15	* without specific prior written permission.
	16	*
	17	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	18	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	19	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	20	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	21	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	22	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	23	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	24	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	25	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	26	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	27	* SUCH DAMAGE.
	28	*/
	29
9385eb3d	30	#if defined(LIBC_SCCS) && !defined(lint)
34e8f829	31	static const char sccsid[] = "@(#)inet_network.c 8.1 (Berkeley) 6/4/93";
9385eb3d A	32	#endif /* LIBC_SCCS and not lint */
9385eb3d A	33	#include <sys/cdefs.h>
34e8f829 A	34	__FBSDID("$FreeBSD: src/lib/libc/inet/inet_network.c,v 1.5 2008/01/14 22:55:20 cperciva Exp $");
	35
	36	#include "port_before.h"
e9ce8d39 A	37
	38	#include <sys/types.h>
	39	#include <netinet/in.h>
	40	#include <arpa/inet.h>
	41	#include <ctype.h>
	42
34e8f829 A	43	#include "port_after.h"
	44
	45	/*%
e9ce8d39 A	46	* Internet network address interpretation routine.
	47	* The library routines call this routine to interpret
	48	* network numbers.
	49	*/
9385eb3d	50	in_addr_t
e9ce8d39	51	inet_network(cp)
9385eb3d	52	const char *cp;
e9ce8d39	53	{
9385eb3d A	54	in_addr_t val, base, n;
	55	char c;
	56	in_addr_t parts[4], *pp = parts;
34e8f829	57	int i, digit;
e9ce8d39 A	58
e9ce8d39 A	59	again:
34e8f829	60	val = 0; base = 10; digit = 0;
e9ce8d39	61	if (*cp == '0')
34e8f829	62	digit = 1, base = 8, cp++;
e9ce8d39 A	63	if (cp == 'x' \|\| cp == 'X')
e9ce8d39 A	64	base = 16, cp++;
9385eb3d A	65	while ((c = *cp) != 0) {
9385eb3d A	66	if (isdigit((unsigned char)c)) {
34e8f829 A	67	if (base == 8U && (c == '8' \|\| c == '9'))
34e8f829 A	68	return (INADDR_NONE);
e9ce8d39 A	69	val = (val * base) + (c - '0');
e9ce8d39 A	70	cp++;
34e8f829	71	digit = 1;
e9ce8d39 A	72	continue;
e9ce8d39 A	73	}
34e8f829 A	74	if (base == 16U && isxdigit((unsigned char)c)) {
	75	val = (val << 4) +
	76	(c + 10 - (islower((unsigned char)c) ? 'a' : 'A'));
e9ce8d39	77	cp++;
34e8f829	78	digit = 1;
e9ce8d39 A	79	continue;
	80	}
	81	break;
	82	}
34e8f829 A	83	if (!digit)
	84	return (INADDR_NONE);
	85	if (pp >= parts + 4 \|\| val > 0xffU)
	86	return (INADDR_NONE);
e9ce8d39	87	if (*cp == '.') {
e9ce8d39 A	88	*pp++ = val, cp++;
	89	goto again;
	90	}
34e8f829	91	if (cp && !isspace(cp&0xff))
e9ce8d39 A	92	return (INADDR_NONE);
	93	*pp++ = val;
	94	n = pp - parts;
34e8f829 A	95	if (n > 4U)
34e8f829 A	96	return (INADDR_NONE);
e9ce8d39 A	97	for (val = 0, i = 0; i < n; i++) {
	98	val <<= 8;
	99	val \|= parts[i] & 0xff;
	100	}
	101	return (val);
	102	}
9385eb3d A	103
	104	/*
	105	* Weak aliases for applications that use certain private entry points,
	106	* and fail to include <arpa/inet.h>.
	107	*/
	108	#undef inet_network
	109	__weak_reference(__inet_network, inet_network);
34e8f829 A	110
34e8f829 A	111	/! \file /