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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