blob: 185d606d68adf77ad08d4f082e6f493fa3c21a54 (
plain)
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
|
/* Copyright (C) 1996-2018 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
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
<http://www.gnu.org/licenses/>. */
#include <ctype.h>
#include <stdlib.h>
#include <netinet/ether.h>
#include <netinet/if_ether.h>
struct ether_addr *
ether_aton_r (const char *asc, struct ether_addr *addr)
{
size_t cnt;
for (cnt = 0; cnt < 6; ++cnt)
{
unsigned int number;
char ch;
ch = _tolower (*asc++);
if ((ch < '0' || ch > '9') && (ch < 'a' || ch > 'f'))
return NULL;
number = isdigit (ch) ? (ch - '0') : (ch - 'a' + 10);
ch = _tolower (*asc);
if ((cnt < 5 && ch != ':') || (cnt == 5 && ch != '\0' && !isspace (ch)))
{
++asc;
if ((ch < '0' || ch > '9') && (ch < 'a' || ch > 'f'))
return NULL;
number <<= 4;
number += isdigit (ch) ? (ch - '0') : (ch - 'a' + 10);
ch = *asc;
if (cnt < 5 && ch != ':')
return NULL;
}
/* Store result. */
addr->ether_addr_octet[cnt] = (unsigned char) number;
/* Skip ':'. */
++asc;
}
return addr;
}
libc_hidden_def (ether_aton_r)
|
