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