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4caef86c | 1 | /* Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc. |
c84142e8 UD |
2 | This file is part of the GNU C Library. |
3 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. | |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Library General Public License as | |
7 | published by the Free Software Foundation; either version 2 of the | |
8 | License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Library General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Library General Public | |
16 | License along with the GNU C Library; see the file COPYING.LIB. If not, | |
17 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
18 | Boston, MA 02111-1307, USA. */ | |
6dbe2837 RM |
19 | |
20 | #include <ctype.h> | |
21 | #include <stdlib.h> | |
22 | #include <netinet/ether.h> | |
23 | #include <netinet/if_ether.h> | |
24 | ||
25 | ||
26 | struct ether_addr * | |
27 | ether_aton_r (const char *asc, struct ether_addr *addr) | |
28 | { | |
29 | size_t cnt; | |
30 | ||
31 | for (cnt = 0; cnt < 6; ++cnt) | |
32 | { | |
33 | unsigned int number; | |
34 | char ch; | |
35 | ||
4caef86c | 36 | ch = _tolower (*asc++); |
6dbe2837 RM |
37 | if ((ch < '0' || ch > '9') && (ch < 'a' || ch > 'f')) |
38 | return NULL; | |
39 | number = isdigit (ch) ? (ch - '0') : (ch - 'a' + 10); | |
40 | ||
4caef86c | 41 | ch = _tolower (*asc); |
6dbe2837 RM |
42 | if ((cnt < 5 && ch != ':') || (cnt == 5 && ch != '\0' && !isspace (ch))) |
43 | { | |
44 | ++asc; | |
45 | if ((ch < '0' || ch > '9') && (ch < 'a' || ch > 'f')) | |
46 | return NULL; | |
47 | number <<= 4; | |
5005d3b3 | 48 | number += isdigit (ch) ? (ch - '0') : (ch - 'a' + 10); |
6dbe2837 RM |
49 | |
50 | ch = *asc; | |
51 | if (cnt < 5 && ch != ':') | |
52 | return NULL; | |
53 | } | |
54 | ||
55 | /* Store result. */ | |
56 | addr->ether_addr_octet[cnt] = (unsigned char) number; | |
57 | ||
58 | /* Skip ':'. */ | |
59 | ++asc; | |
60 | } | |
61 | ||
62 | return addr; | |
63 | } |