Update.
[glibc.git] / inet / inet_net.c
blob1def607278cf8eaf20a972ea9d4ca01793ddb812
1 /*
2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
34 #if defined(LIBC_SCCS) && !defined(lint)
35 static char sccsid[] = "@(#)inet_network.c 8.1 (Berkeley) 6/4/93";
36 #endif /* LIBC_SCCS and not lint */
38 #include <sys/types.h>
39 #include <netinet/in.h>
40 #include <arpa/inet.h>
41 #include <ctype.h>
44 * Internet network address interpretation routine.
45 * The library routines call this routine to interpret
46 * network numbers.
48 u_int32_t
49 inet_network(cp)
50 register const char *cp;
52 register u_int32_t val, base, n, i;
53 register char c;
54 u_int32_t parts[4], *pp = parts;
56 again:
57 val = 0; base = 10;
58 if (*cp == '0')
59 base = 8, cp++;
60 if (*cp == 'x' || *cp == 'X')
61 base = 16, cp++;
62 while (c = *cp) {
63 if (isdigit(c)) {
64 val = (val * base) + (c - '0');
65 cp++;
66 continue;
68 if (base == 16 && isxdigit(c)) {
69 val = (val << 4) + (c + 10 - (islower(c) ? 'a' : 'A'));
70 cp++;
71 continue;
73 break;
75 if (*cp == '.') {
76 if (pp >= parts + 4)
77 return (INADDR_NONE);
78 *pp++ = val, cp++;
79 goto again;
81 if (*cp && !isspace(*cp))
82 return (INADDR_NONE);
83 *pp++ = val;
84 n = pp - parts;
85 if (n > 4)
86 return (INADDR_NONE);
87 for (val = 0, i = 0; i < n; i++) {
88 val <<= 8;
89 val |= parts[i] & 0xff;
91 return (val);