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#include "lint.h"
41
42#include <sys/types.h>
43
44#include <netinet/in.h>
45
46#include <ctype.h>
47
48/*
49 * Internet network address interpretation routine.
50 * The library routines call this routine to interpret
51 * network numbers.
52 */
53in_addr_t
54inet_network(const char *cp)
55{
56	in_addr_t val;
57	int base;
58	ptrdiff_t n;
59	char c;
60	in_addr_t parts[4], *pp = parts;
61	int i;
62
63again:
64	val = 0; base = 10;
65	if (*cp == '0') {
66		if (*++cp == 'x' || *cp == 'X')
67			base = 16, cp++;
68		else
69			base = 8;
70	}
71	while ((c = *cp) != '\0') {
72		if (isdigit(c)) {
73			if ((c - '0') >= base)
74				break;
75			val = (val * base) + (c - '0');
76			cp++;
77			continue;
78		}
79		if (base == 16 && isxdigit(c)) {
80			val = (val << 4) + (c + 10 - (islower(c) ? 'a' : 'A'));
81			cp++;
82			continue;
83		}
84		break;
85	}
86	if (pp >= parts + 4 || val > 0xff)
87		return ((in_addr_t)-1);
88	*pp++ = val;
89	if (*cp == '.') {
90		cp++;
91		goto again;
92	}
93	if (*cp != '\0' && !isspace(*cp))
94		return ((in_addr_t)-1);
95	n = pp - parts;
96	for (val = 0, i = 0; i < n; i++) {
97		val <<= 8;
98		val |= parts[i];
99	}
100	return (val);
101}
102