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[glibc/history.git] / inet / inet_net.c
blobe9331c59266a0207d5ec547d3c422acfd275440b
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 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
30 #if defined(LIBC_SCCS) && !defined(lint)
31 static char sccsid[] = "@(#)inet_network.c 8.1 (Berkeley) 6/4/93";
32 #endif /* LIBC_SCCS and not lint */
34 #include <sys/types.h>
35 #include <netinet/in.h>
36 #include <arpa/inet.h>
37 #include <ctype.h>
40 * Internet network address interpretation routine.
41 * The library routines call this routine to interpret
42 * network numbers.
44 u_int32_t
45 inet_network(cp)
46 register const char *cp;
48 register u_int32_t val, base, n, i;
49 register char c;
50 u_int32_t parts[4], *pp = parts;
51 int digit;
53 again:
54 val = 0; base = 10; digit = 0;
55 if (*cp == '0')
56 digit = 1, base = 8, cp++;
57 if (*cp == 'x' || *cp == 'X')
58 base = 16, cp++;
59 while ((c = *cp) != 0) {
60 if (isdigit(c)) {
61 if (base == 8 && (c == '8' || c == '9'))
62 return (INADDR_NONE);
63 val = (val * base) + (c - '0');
64 cp++;
65 digit = 1;
66 continue;
68 if (base == 16 && isxdigit(c)) {
69 val = (val << 4) + (tolower (c) + 10 - 'a');
70 cp++;
71 digit = 1;
72 continue;
74 break;
76 if (!digit)
77 return (INADDR_NONE);
78 if (pp >= parts + 4 || val > 0xff)
79 return (INADDR_NONE);
80 if (*cp == '.') {
81 *pp++ = val, cp++;
82 goto again;
84 if (*cp && !isspace(*cp))
85 return (INADDR_NONE);
86 if (pp >= parts + 4 || val > 0xff)
87 return (INADDR_NONE);
88 *pp++ = val;
89 n = pp - parts;
90 for (val = 0, i = 0; i < n; i++) {
91 val <<= 8;
92 val |= parts[i] & 0xff;
94 return (val);