1/*
2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
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.
16 *
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.
28 */
29
30/* Copyright (C) 2013-2020 Free Software Foundation, Inc.
31 This file is part of the GNU C Library.
32
33 The GNU C Library is free software; you can redistribute it and/or
34 modify it under the terms of the GNU Lesser General Public
35 License as published by the Free Software Foundation; either
36 version 2.1 of the License, or (at your option) any later version.
37
38 The GNU C Library is distributed in the hope that it will be useful,
39 but WITHOUT ANY WARRANTY; without even the implied warranty of
40 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
41 Lesser General Public License for more details.
42
43 You should have received a copy of the GNU Lesser General Public
44 License along with the GNU C Library; if not, see
45 <https://www.gnu.org/licenses/>. */
46
47#include <sys/types.h>
48#include <netinet/in.h>
49#include <arpa/inet.h>
50#include <ctype.h>
51
52/*
53 * Internet network address interpretation routine.
54 * The library routines call this routine to interpret
55 * network numbers.
56 */
57uint32_t
58inet_network (const char *cp)
59{
60 uint32_t val, base, n, i;
61 char c;
62 uint32_t parts[4], *pp = parts;
63 int digit;
64
65again:
66 val = 0; base = 10; digit = 0;
67 if (*cp == '0')
68 digit = 1, base = 8, cp++;
69 if (*cp == 'x' || *cp == 'X')
70 digit = 0, base = 16, cp++;
71 while ((c = *cp) != 0) {
72 if (isdigit(c)) {
73 if (base == 8 && (c == '8' || c == '9'))
74 return (INADDR_NONE);
75 val = (val * base) + (c - '0');
76 cp++;
77 digit = 1;
78 continue;
79 }
80 if (base == 16 && isxdigit(c)) {
81 val = (val << 4) + (tolower (c) + 10 - 'a');
82 cp++;
83 digit = 1;
84 continue;
85 }
86 break;
87 }
88 if (!digit)
89 return (INADDR_NONE);
90 if (pp >= parts + 4 || val > 0xff)
91 return (INADDR_NONE);
92 if (*cp == '.') {
93 *pp++ = val, cp++;
94 goto again;
95 }
96 while (isspace(*cp))
97 cp++;
98 if (*cp)
99 return (INADDR_NONE);
100 if (pp >= parts + 4 || val > 0xff)
101 return (INADDR_NONE);
102 *pp++ = val;
103 n = pp - parts;
104 for (val = 0, i = 0; i < n; i++) {
105 val <<= 8;
106 val |= parts[i] & 0xff;
107 }
108 return (val);
109}
110