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
inet_network(const char * cp)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