| 1 | /* Copyright (C) 1996,97,98,99,2002 Free Software Foundation, Inc. |
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| 2 | This file is part of the GNU C Library. |
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| 3 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, write to the Free |
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| 17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
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| 18 | 02111-1307 USA. */ |
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| 19 | |
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| 20 | #include <ctype.h> |
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| 21 | #include <stdlib.h> |
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| 22 | #include <netinet/ether.h> |
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| 23 | #include <netinet/if_ether.h> |
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| 24 | |
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| 25 | |
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| 26 | struct ether_addr * |
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| 27 | ether_aton_r (const char *asc, struct ether_addr *addr) |
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| 28 | { |
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| 29 | size_t cnt; |
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| 30 | |
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| 31 | for (cnt = 0; cnt < 6; ++cnt) |
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| 32 | { |
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| 33 | unsigned int number; |
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| 34 | char ch; |
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| 35 | |
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| 36 | ch = _tolower (*asc++); |
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| 37 | if ((ch < '0' || ch > '9') && (ch < 'a' || ch > 'f')) |
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| 38 | return NULL; |
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| 39 | number = isdigit (ch) ? (ch - '0') : (ch - 'a' + 10); |
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| 40 | |
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| 41 | ch = _tolower (*asc); |
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| 42 | if ((cnt < 5 && ch != ':') || (cnt == 5 && ch != '\0' && !isspace (ch))) |
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| 43 | { |
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| 44 | ++asc; |
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| 45 | if ((ch < '0' || ch > '9') && (ch < 'a' || ch > 'f')) |
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| 46 | return NULL; |
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| 47 | number <<= 4; |
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| 48 | number += isdigit (ch) ? (ch - '0') : (ch - 'a' + 10); |
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| 49 | |
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| 50 | ch = *asc; |
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| 51 | if (cnt < 5 && ch != ':') |
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| 52 | return NULL; |
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| 53 | } |
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| 54 | |
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| 55 | /* Store result. */ |
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| 56 | addr->ether_addr_octet[cnt] = (unsigned char) number; |
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| 57 | |
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| 58 | /* Skip ':'. */ |
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| 59 | ++asc; |
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| 60 | } |
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| 61 | |
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| 62 | return addr; |
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| 63 | } |
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| 64 | libc_hidden_def (ether_aton_r) |
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