1 /* $NetBSD: inet_network.c,v 1.1.1.1 2009/04/12 15:33:34 christos Exp $ */
2
3 /*
4 * Copyright (c) 1983, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by the University of
18 * California, Berkeley and its contributors.
19 * 4. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36 #if defined(LIBC_SCCS) && !defined(lint)
37 static const char sccsid[] = "@(#)inet_network.c 8.1 (Berkeley) 6/4/93";
38 #endif /* LIBC_SCCS and not lint */
39
40 #include "port_before.h"
41
42 #include <sys/types.h>
43 #include <netinet/in.h>
44 #include <arpa/inet.h>
45 #include <ctype.h>
46
47 #include "port_after.h"
48
49 /*%
50 * Internet network address interpretation routine.
51 * The library routines call this routine to interpret
52 * network numbers.
53 */
54 u_long
inet_network(cp)55 inet_network(cp)
56 register const char *cp;
57 {
58 register u_long val, base, n, i;
59 register char c;
60 u_long parts[4], *pp = parts;
61 int digit;
62
63 again:
64 val = 0; base = 10; digit = 0;
65 if (*cp == '0')
66 digit = 1, base = 8, cp++;
67 if (*cp == 'x' || *cp == 'X')
68 base = 16, cp++;
69 while ((c = *cp) != 0) {
70 if (isdigit((unsigned char)c)) {
71 if (base == 8U && (c == '8' || c == '9'))
72 return (INADDR_NONE);
73 val = (val * base) + (c - '0');
74 cp++;
75 digit = 1;
76 continue;
77 }
78 if (base == 16U && isxdigit((unsigned char)c)) {
79 val = (val << 4) +
80 (c + 10 - (islower((unsigned char)c) ? 'a' : 'A'));
81 cp++;
82 digit = 1;
83 continue;
84 }
85 break;
86 }
87 if (!digit)
88 return (INADDR_NONE);
89 if (pp >= parts + 4 || val > 0xffU)
90 return (INADDR_NONE);
91 if (*cp == '.') {
92 *pp++ = val, cp++;
93 goto again;
94 }
95 if (*cp && !isspace(*cp&0xff))
96 return (INADDR_NONE);
97 *pp++ = val;
98 n = pp - parts;
99 if (n > 4U)
100 return (INADDR_NONE);
101 for (val = 0, i = 0; i < n; i++) {
102 val <<= 8;
103 val |= parts[i] & 0xff;
104 }
105 return (val);
106 }
107
108 /*! \file */
109