/* * Copyright (c) 1983, 1993 *	The Regents of the University of California.  All rights reserved. * 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. All advertising materials mentioning features or use of this software *    must display the following acknowledgement: *	This product includes software developed by the University of *	California, Berkeley and its contributors. * 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 char sccsid[] = "@(#)inet_network.c	8.1 (Berkeley) 6/4/93";#endif /* LIBC_SCCS and not lint */#include "inetprivate.h"/* * Internet network address interpretation routine. * The library routines call this routine to interpret * network numbers. */u_int32_tinet_network(const char *cp){	register u_long val, base, n;	register char c;	u_long parts[4], *pp = parts;	register int i;again:	/*	 * Collect number up to ``.''.	 * Values are specified as for C:	 * 0x=hex, 0=octal, other=decimal.	 */	val = 0; base = 10;	/*	 * The 4.4BSD version of this file also accepts 'x__' as a hexa	 * number.  I don't think this is correct.  -- Uli	 */	if (*cp == '0') {		if (*++cp == 'x' || *cp == 'X')			base = 16, cp++;		else			base = 8;	}	while ((c = *cp)) {		if (isdigit(c)) {			val = (val * base) + (c - '0');			cp++;			continue;		}		if (base == 16 && isxdigit(c)) {			val = (val << 4) + (c + 10 - (islower(c) ? 'a' : 'A'));			cp++;			continue;		}		break;	}	if (*cp == '.') {		if (pp >= parts + 4)			return (INADDR_NONE);		*pp++ = val, cp++;		goto again;	}	if (*cp && !isspace(*cp))		return (INADDR_NONE);	*pp++ = val;	n = pp - parts;	if (n > 4)		return (INADDR_NONE);	for (val = 0, i = 0; i < (int)n; i++) {		val <<= 8;		val |= parts[i] & 0xff;	}	return (val);}