| xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame] | 1 | /* Copyright (C) 1996-2016 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. |
| 3 | |
| 4 | The GNU C Library is free software; you can redistribute it and/or |
| 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. |
| 8 | |
| 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 |
| 12 | Lesser General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU Lesser General Public |
| 15 | License along with the GNU C Library; if not, see |
| 16 | <http://www.gnu.org/licenses/>. */ |
| 17 | |
| 18 | #include <ctype.h> |
| 19 | #include <stdlib.h> |
| 20 | #include <string.h> |
| 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 | { |
| 28 | for (size_t cnt = 0; cnt < 6; ++cnt) |
| 29 | { |
| 30 | unsigned int number; |
| 31 | char ch; |
| 32 | |
| 33 | ch = _tolower (*line++); |
| 34 | if ((ch < '0' || ch > '9') && (ch < 'a' || ch > 'f')) |
| 35 | return -1; |
| 36 | number = isdigit (ch) ? (ch - '0') : (ch - 'a' + 10); |
| 37 | |
| 38 | ch = _tolower (*line); |
| 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; |
| 45 | number += isdigit (ch) ? (ch - '0') : (ch - 'a' + 10); |
| 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 | |
| 60 | /* Skip initial whitespace. */ |
| 61 | while (isspace (*line)) |
| 62 | ++line; |
| 63 | |
| 64 | if (*line == '#' || *line == '\0') |
| 65 | /* No hostname. */ |
| 66 | return -1; |
| 67 | |
| 68 | /* The hostname is up to the next non-space character. */ |
| 69 | /* XXX This can cause trouble because the hostname might be too long |
| 70 | but we have no possibility to check it here. */ |
| 71 | while (*line != '\0' && *line != '#' && !isspace (*line)) |
| 72 | *hostname++ = *line++; |
| 73 | *hostname = '\0'; |
| 74 | |
| 75 | return 0; |
| 76 | } |