1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
|
/* Legacy IPv4 text-to-address functions.
Copyright (C) 2019-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
/*
* Copyright (c) 1983, 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* Portions Copyright (c) 1993 by Digital Equipment Corporation.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies, and that
* the name of Digital Equipment Corporation not be used in advertising or
* publicity pertaining to distribution of the document or software without
* specific, written prior permission.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
* WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
* CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
* SOFTWARE.
*/
/*
* Portions Copyright (c) 1996-1999 by Internet Software Consortium.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
* CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
* SOFTWARE.
*/
#include <sys/types.h>
#include <sys/param.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <ctype.h>
#include <endian.h>
#include <stdint.h>
#include <stdlib.h>
#include <limits.h>
#include <errno.h>
/* Check whether "cp" is a valid ASCII representation of an IPv4
Internet address and convert it to a binary address. Returns 1 if
the address is valid, 0 if not. This replaces inet_addr, the
return value from which cannot distinguish between failure and a
local broadcast address. Write a pointer to the first
non-converted character to *endp. */
static int
inet_aton_end (const char *cp, struct in_addr *addr, const char **endp)
{
static const in_addr_t max[4] = { 0xffffffff, 0xffffff, 0xffff, 0xff };
in_addr_t val;
char c;
union iaddr
{
uint8_t bytes[4];
uint32_t word;
} res;
uint8_t *pp = res.bytes;
int digit;
int saved_errno = errno;
__set_errno (0);
res.word = 0;
c = *cp;
for (;;)
{
/* Collect number up to ``.''. Values are specified as for C:
0x=hex, 0=octal, isdigit=decimal. */
if (!isdigit (c))
goto ret_0;
{
char *endp;
unsigned long ul = strtoul (cp, &endp, 0);
if (ul == ULONG_MAX && errno == ERANGE)
goto ret_0;
if (ul > 0xfffffffful)
goto ret_0;
val = ul;
digit = cp != endp;
cp = endp;
}
c = *cp;
if (c == '.')
{
/* Internet format:
a.b.c.d
a.b.c (with c treated as 16 bits)
a.b (with b treated as 24 bits). */
if (pp > res.bytes + 2 || val > 0xff)
goto ret_0;
*pp++ = val;
c = *++cp;
}
else
break;
}
/* Check for trailing characters. */
if (c != '\0' && (!isascii (c) || !isspace (c)))
goto ret_0;
/* Did we get a valid digit? */
if (!digit)
goto ret_0;
/* Check whether the last part is in its limits depending on the
number of parts in total. */
if (val > max[pp - res.bytes])
goto ret_0;
if (addr != NULL)
addr->s_addr = res.word | htonl (val);
*endp = cp;
__set_errno (saved_errno);
return 1;
ret_0:
__set_errno (saved_errno);
return 0;
}
int
__inet_aton_exact (const char *cp, struct in_addr *addr)
{
struct in_addr val;
const char *endp;
/* Check that inet_aton_end parsed the entire string. */
if (inet_aton_end (cp, &val, &endp) != 0 && *endp == 0)
{
*addr = val;
return 1;
}
else
return 0;
}
libc_hidden_def (__inet_aton_exact)
/* inet_aton ignores trailing garbage. */
int
__inet_aton_ignore_trailing (const char *cp, struct in_addr *addr)
{
const char *endp;
return inet_aton_end (cp, addr, &endp);
}
weak_alias (__inet_aton_ignore_trailing, inet_aton)
/* ASCII IPv4 Internet address interpretation routine. The value
returned is in network order. */
in_addr_t
__inet_addr (const char *cp)
{
struct in_addr val;
const char *endp;
if (inet_aton_end (cp, &val, &endp))
return val.s_addr;
return INADDR_NONE;
}
weak_alias (__inet_addr, inet_addr)
|
GitWeb