GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libc/net/inet_addr.c Lines: 0 51 0.0 %
Date: 2017-11-13 Branches: 0 55 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: inet_addr.c,v 1.12 2015/09/13 21:36:08 guenther Exp $	*/
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/*
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 * ++Copyright++ 1983, 1990, 1993
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 * -
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 * Copyright (c) 1983, 1990, 1993
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 *    The Regents of the University of California.  All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. Neither the name of the University nor the names of its contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 * -
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 * Portions Copyright (c) 1993 by Digital Equipment Corporation.
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 *
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 * Permission to use, copy, modify, and distribute this software for any
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 * purpose with or without fee is hereby granted, provided that the above
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 * copyright notice and this permission notice appear in all copies, and that
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 * the name of Digital Equipment Corporation not be used in advertising or
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 * publicity pertaining to distribution of the document or software without
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 * specific, written prior permission.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
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 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS.   IN NO EVENT SHALL DIGITAL EQUIPMENT
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 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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 * SOFTWARE.
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 * -
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 * --Copyright--
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 */
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#include <sys/types.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <ctype.h>
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/*
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 * Ascii internet address interpretation routine.
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 * The value returned is in network order.
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 */
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in_addr_t
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inet_addr(const char *cp)
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{
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	struct in_addr val;
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	if (inet_aton(cp, &val))
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		return (val.s_addr);
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	return (INADDR_NONE);
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}
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/*
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 * Check whether "cp" is a valid ascii representation
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 * of an Internet address and convert to a binary address.
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 * Returns 1 if the address is valid, 0 if not.
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 * This replaces inet_addr, the return value from which
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 * cannot distinguish between failure and a local broadcast address.
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 */
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int
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inet_aton(const char *cp, struct in_addr *addr)
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{
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	in_addr_t val;
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	int base, n;
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	char c;
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	u_int parts[4];
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	u_int *pp = parts;
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	c = *cp;
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	for (;;) {
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		/*
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		 * Collect number up to ``.''.
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		 * Values are specified as for C:
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		 * 0x=hex, 0=octal, isdigit=decimal.
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		 */
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		if (!isdigit((unsigned char)c))
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			return (0);
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		val = 0; base = 10;
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		if (c == '0') {
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			c = *++cp;
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			if (c == 'x' || c == 'X')
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				base = 16, c = *++cp;
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			else
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				base = 8;
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		}
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		for (;;) {
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			if (isascii((unsigned char)c) &&
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			    isdigit((unsigned char)c)) {
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				val = (val * base) + (c - '0');
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				c = *++cp;
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			} else if (base == 16 &&
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			    isascii((unsigned char)c) &&
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			    isxdigit((unsigned char)c)) {
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				val = (val << 4) |
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				    (c + 10 - (islower((unsigned char)c) ? 'a' : 'A'));
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				c = *++cp;
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			} else
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				break;
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		}
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		if (c == '.') {
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			/*
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			 * Internet format:
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			 *	a.b.c.d
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			 *	a.b.c	(with c treated as 16 bits)
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			 *	a.b	(with b treated as 24 bits)
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			 */
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			if (pp >= parts + 3)
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				return (0);
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			*pp++ = val;
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			c = *++cp;
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		} else
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			break;
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	}
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	/*
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	 * Check for trailing characters.
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	 */
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	if (c != '\0' &&
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	    (!isascii((unsigned char)c) || !isspace((unsigned char)c)))
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		return (0);
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	/*
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	 * Concoct the address according to
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	 * the number of parts specified.
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	 */
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	n = pp - parts + 1;
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	switch (n) {
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	case 0:
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		return (0);		/* initial nondigit */
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	case 1:				/* a -- 32 bits */
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		break;
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	case 2:				/* a.b -- 8.24 bits */
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		if ((val > 0xffffff) || (parts[0] > 0xff))
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			return (0);
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		val |= parts[0] << 24;
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		break;
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	case 3:				/* a.b.c -- 8.8.16 bits */
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		if ((val > 0xffff) || (parts[0] > 0xff) || (parts[1] > 0xff))
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			return (0);
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		val |= (parts[0] << 24) | (parts[1] << 16);
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		break;
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	case 4:				/* a.b.c.d -- 8.8.8.8 bits */
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		if ((val > 0xff) || (parts[0] > 0xff) || (parts[1] > 0xff) || (parts[2] > 0xff))
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			return (0);
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		val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8);
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		break;
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	}
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	if (addr)
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		addr->s_addr = htonl(val);
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	return (1);
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}
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DEF_WEAK(inet_aton);