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dff8da6b | 1 | /* Copyright (C) 1996-2024 Free Software Foundation, Inc. |
afd4eb37 | 2 | This file is part of the GNU C Library. |
6dbe2837 | 3 | |
afd4eb37 | 4 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
6dbe2837 | 8 | |
afd4eb37 UD |
9 | The GNU C Library is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
6dbe2837 | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 15 | License along with the GNU C Library; if not, see |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
6dbe2837 | 17 | |
afd4eb37 | 18 | #include <ctype.h> |
6dbe2837 | 19 | #include <stdlib.h> |
afd4eb37 | 20 | #include <string.h> |
6dbe2837 RM |
21 | #include <netinet/ether.h> |
22 | #include <netinet/if_ether.h> | |
23 | ||
24 | ||
25 | int | |
26 | ether_line (const char *line, struct ether_addr *addr, char *hostname) | |
27 | { | |
e4297631 | 28 | for (size_t cnt = 0; cnt < 6; ++cnt) |
6dbe2837 RM |
29 | { |
30 | unsigned int number; | |
31 | char ch; | |
32 | ||
4caef86c | 33 | ch = _tolower (*line++); |
6dbe2837 RM |
34 | if ((ch < '0' || ch > '9') && (ch < 'a' || ch > 'f')) |
35 | return -1; | |
36 | number = isdigit (ch) ? (ch - '0') : (ch - 'a' + 10); | |
37 | ||
4caef86c | 38 | ch = _tolower (*line); |
6dbe2837 RM |
39 | if ((cnt < 5 && ch != ':') || (cnt == 5 && ch != '\0' && !isspace (ch))) |
40 | { | |
41 | ++line; | |
42 | if ((ch < '0' || ch > '9') && (ch < 'a' || ch > 'f')) | |
43 | return -1; | |
44 | number <<= 4; | |
c0a0f9a3 | 45 | number += isdigit (ch) ? (ch - '0') : (ch - 'a' + 10); |
6dbe2837 RM |
46 | |
47 | ch = *line; | |
48 | if (cnt < 5 && ch != ':') | |
49 | return -1; | |
50 | } | |
51 | ||
52 | /* Store result. */ | |
53 | addr->ether_addr_octet[cnt] = (unsigned char) number; | |
54 | ||
55 | /* Skip ':'. */ | |
56 | if (ch != '\0') | |
57 | ++line; | |
58 | } | |
59 | ||
26e21e75 UD |
60 | /* Skip initial whitespace. */ |
61 | while (isspace (*line)) | |
62 | ++line; | |
6dbe2837 | 63 | |
26e21e75 | 64 | if (*line == '#' || *line == '\0') |
6dbe2837 RM |
65 | /* No hostname. */ |
66 | return -1; | |
67 | ||
26e21e75 | 68 | /* The hostname is up to the next non-space character. */ |
6dbe2837 RM |
69 | /* XXX This can cause trouble because the hostname might be too long |
70 | but we have no possibility to check it here. */ | |
26e21e75 UD |
71 | while (*line != '\0' && *line != '#' && !isspace (*line)) |
72 | *hostname++ = *line++; | |
73 | *hostname = '\0'; | |
6dbe2837 RM |
74 | |
75 | return 0; | |
76 | } |