Home | History | Annotate | Download | only in inet
      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License, Version 1.0 only
      6  * (the "License").  You may not use this file except in compliance
      7  * with the License.
      8  *
      9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
     10  * or http://www.opensolaris.org/os/licensing.
     11  * See the License for the specific language governing permissions
     12  * and limitations under the License.
     13  *
     14  * When distributing Covered Code, include this CDDL HEADER in each
     15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     16  * If applicable, add the following below this CDDL HEADER, with the
     17  * fields enclosed by brackets "[]" replaced with your own identifying
     18  * information: Portions Copyright [yyyy] [name of copyright owner]
     19  *
     20  * CDDL HEADER END
     21  */
     22 /*
     23  * Copyright 2001 Sun Microsystems, Inc.  All rights reserved.
     24  * Use is subject to license terms.
     25  */
     26 
     27 /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
     28 /*	  All Rights Reserved  	*/
     29 
     30 /*
     31  * University Copyright- Copyright (c) 1982, 1986, 1988
     32  * The Regents of the University of California
     33  * All Rights Reserved
     34  *
     35  * University Acknowledgment- Portions of this document are derived from
     36  * software developed by the University of California, Berkeley, and its
     37  * contributors.
     38  */
     39 
     40 #pragma ident	"%Z%%M%	%I%	%E% SMI"
     41 
     42 #include <sys/types.h>
     43 #include <ctype.h>
     44 #include <netinet/in.h>
     45 
     46 /*
     47  * Internet network address interpretation routine.
     48  * The library routines call this routine to interpret
     49  * network numbers.
     50  */
     51 in_addr_t
     52 inet_network(const char *cp)
     53 {
     54 	in_addr_t val;
     55 	int base;
     56 	ptrdiff_t n;
     57 	char c;
     58 	in_addr_t parts[4], *pp = parts;
     59 	int i;
     60 
     61 again:
     62 	val = 0; base = 10;
     63 	if (*cp == '0') {
     64 		if (*++cp == 'x' || *cp == 'X')
     65 			base = 16, cp++;
     66 		else
     67 			base = 8;
     68 	}
     69 	while ((c = *cp) != NULL) {
     70 		if (isdigit(c)) {
     71 			if ((c - '0') >= base)
     72 			    break;
     73 			val = (val * base) + (c - '0');
     74 			cp++;
     75 			continue;
     76 		}
     77 		if (base == 16 && isxdigit(c)) {
     78 			val = (val << 4) + (c + 10 - (islower(c) ? 'a' : 'A'));
     79 			cp++;
     80 			continue;
     81 		}
     82 		break;
     83 	}
     84 	if (pp >= parts + 4 || val > 0xff)
     85 		return ((in_addr_t)-1);
     86 	*pp++ = val;
     87 	if (*cp == '.') {
     88 		cp++;
     89 		goto again;
     90 	}
     91 	if (*cp != '\0' && !isspace(*cp))
     92 		return ((in_addr_t)-1);
     93 	n = pp - parts;
     94 	for (val = 0, i = 0; i < n; i++) {
     95 		val <<= 8;
     96 		val |= parts[i];
     97 	}
     98 	return (val);
     99 }
    100