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28f540f4 RM |
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. | |
28f540f4 RM |
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 | ||
d614a753 | 30 | /* Copyright (C) 2013-2020 Free Software Foundation, Inc. |
264aad1e OB |
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 | |
5a82c748 | 45 | <https://www.gnu.org/licenses/>. */ |
264aad1e | 46 | |
28f540f4 RM |
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 | */ | |
d9fee042 | 57 | uint32_t |
9d46370c | 58 | inet_network (const char *cp) |
28f540f4 | 59 | { |
d9fee042 | 60 | uint32_t val, base, n, i; |
2e09a79a | 61 | char c; |
d9fee042 | 62 | uint32_t parts[4], *pp = parts; |
613444ea | 63 | int digit; |
28f540f4 RM |
64 | |
65 | again: | |
613444ea | 66 | val = 0; base = 10; digit = 0; |
28f540f4 | 67 | if (*cp == '0') |
613444ea | 68 | digit = 1, base = 8, cp++; |
28f540f4 | 69 | if (*cp == 'x' || *cp == 'X') |
444897ec | 70 | digit = 0, base = 16, cp++; |
613444ea | 71 | while ((c = *cp) != 0) { |
28f540f4 | 72 | if (isdigit(c)) { |
613444ea UD |
73 | if (base == 8 && (c == '8' || c == '9')) |
74 | return (INADDR_NONE); | |
28f540f4 RM |
75 | val = (val * base) + (c - '0'); |
76 | cp++; | |
613444ea | 77 | digit = 1; |
28f540f4 RM |
78 | continue; |
79 | } | |
80 | if (base == 16 && isxdigit(c)) { | |
a1d84548 | 81 | val = (val << 4) + (tolower (c) + 10 - 'a'); |
28f540f4 | 82 | cp++; |
613444ea | 83 | digit = 1; |
28f540f4 RM |
84 | continue; |
85 | } | |
86 | break; | |
87 | } | |
613444ea UD |
88 | if (!digit) |
89 | return (INADDR_NONE); | |
a1d84548 UD |
90 | if (pp >= parts + 4 || val > 0xff) |
91 | return (INADDR_NONE); | |
28f540f4 | 92 | if (*cp == '.') { |
28f540f4 RM |
93 | *pp++ = val, cp++; |
94 | goto again; | |
95 | } | |
264aad1e OB |
96 | while (isspace(*cp)) |
97 | cp++; | |
98 | if (*cp) | |
28f540f4 | 99 | return (INADDR_NONE); |
dcaa768e UD |
100 | if (pp >= parts + 4 || val > 0xff) |
101 | return (INADDR_NONE); | |
28f540f4 RM |
102 | *pp++ = val; |
103 | n = pp - parts; | |
28f540f4 RM |
104 | for (val = 0, i = 0; i < n; i++) { |
105 | val <<= 8; | |
106 | val |= parts[i] & 0xff; | |
107 | } | |
108 | return (val); | |
109 | } |