1 /* Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
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 Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the 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 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If
17 not, see <http://www.gnu.org/licenses/>.
18 */
19
20 /*
21 * 2002-12-24 Nick Fedchik <nick@fedchik.org.ua>
22 * - initial uClibc port
23 */
24
25 #include <ctype.h>
26 #include <stdio.h>
27 #include <stdlib.h>
28 #include <netinet/ether.h>
29 #include <netinet/if_ether.h>
30
ether_aton_r(const char * asc,struct ether_addr * addr)31 struct ether_addr *ether_aton_r(const char *asc, struct ether_addr *addr)
32 {
33 /* asc is "X:XX:XX:x:xx:xX" */
34 int cnt;
35
36 for (cnt = 0; cnt < 6; ++cnt) {
37 unsigned char number;
38 char ch = *asc++;
39
40 if (ch < 0x20)
41 return NULL;
42 /* | 0x20 is cheap tolower(), valid for letters/numbers only */
43 ch |= 0x20;
44 if ((ch < '0' || ch > '9') && (ch < 'a' || ch > 'f'))
45 return NULL;
46 number = !(ch > '9') ? (ch - '0') : (ch - 'a' + 10);
47
48 ch = *asc++;
49 if ((cnt != 5 && ch != ':') /* not last group */
50 /* What standard says ASCII ether address representation
51 * may also finish with whitespace, not only NUL?
52 * We can get rid of isspace() otherwise */
53 || (cnt == 5 && ch != '\0' /*&& !isspace(ch)*/)
54 ) {
55 ch |= 0x20; /* cheap tolower() */
56 if ((ch < '0' || ch > '9') && (ch < 'a' || ch > 'f'))
57 return NULL;
58 number = (number << 4) + (!(ch > '9') ? (ch - '0') : (ch - 'a' + 10));
59
60 if (cnt != 5) {
61 ch = *asc++;
62 if (ch != ':')
63 return NULL;
64 }
65 }
66
67 /* Store result. */
68 addr->ether_addr_octet[cnt] = number;
69 }
70 /* Looks like we allow garbage after last group?
71 * "1:2:3:4:5:66anything_at_all"? */
72
73 return addr;
74 }
libc_hidden_def(ether_aton_r)75 libc_hidden_def(ether_aton_r)
76
77 struct ether_addr *ether_aton(const char *asc)
78 {
79 static struct ether_addr result;
80
81 return ether_aton_r(asc, &result);
82 }
83
ether_ntoa_r(const struct ether_addr * addr,char * buf)84 char *ether_ntoa_r(const struct ether_addr *addr, char *buf)
85 {
86 sprintf(buf, "%x:%x:%x:%x:%x:%x",
87 addr->ether_addr_octet[0], addr->ether_addr_octet[1],
88 addr->ether_addr_octet[2], addr->ether_addr_octet[3],
89 addr->ether_addr_octet[4], addr->ether_addr_octet[5]);
90 return buf;
91 }
libc_hidden_def(ether_ntoa_r)92 libc_hidden_def(ether_ntoa_r)
93
94 char *ether_ntoa(const struct ether_addr *addr)
95 {
96 static char asc[18];
97
98 return ether_ntoa_r(addr, asc);
99 }
100