ether_addr.c 2.8 KB

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  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. 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. The GNU C Library is distributed in the hope that it will be useful,
  9. but WITHOUT ANY WARRANTY; without even the implied warranty of
  10. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11. Lesser General Public License for more details.
  12. You should have received a copy of the GNU Lesser General Public
  13. License along with the GNU C Library; if not, write to the Free
  14. Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  15. 02111-1307 USA.
  16. */
  17. /*
  18. * 2002-12-24 Nick Fedchik <nick@fedchik.org.ua>
  19. * - initial uClibc port
  20. */
  21. #define __FORCE_GLIBC
  22. #include <features.h>
  23. #include <ctype.h>
  24. #include <stdio.h>
  25. #include <stdlib.h>
  26. #include <netinet/ether.h>
  27. #include <netinet/if_ether.h>
  28. struct ether_addr *ether_aton_r(const char *asc, struct ether_addr *addr)
  29. {
  30. /* asc is "X:XX:XX:x:xx:xX" */
  31. int cnt;
  32. for (cnt = 0; cnt < 6; ++cnt) {
  33. unsigned char number;
  34. char ch;
  35. /* | 0x20 is cheap tolower(), valid for letters/numbers only */
  36. ch = (*asc++) | 0x20;
  37. if ((ch < '0' || ch > '9') && (ch < 'a' || ch > 'f'))
  38. return NULL;
  39. number = !(ch > '9') ? (ch - '0') : (ch - 'a' + 10);
  40. ch = *asc++;
  41. if ((cnt != 5 && ch != ':') /* not last group */
  42. /* What standard says ASCII ether address representation
  43. * may also finish with whitespace, not only NUL?
  44. * We can get rid of isspace() otherwise */
  45. || (cnt == 5 && ch != '\0' /*&& !isspace(ch)*/)
  46. ) {
  47. ch |= 0x20; /* cheap tolower() */
  48. if ((ch < '0' || ch > '9') && (ch < 'a' || ch > 'f'))
  49. return NULL;
  50. number = (number << 4) + (!(ch > '9') ? (ch - '0') : (ch - 'a' + 10));
  51. if (cnt != 5) {
  52. ch = *asc++;
  53. if (ch != ':')
  54. return NULL;
  55. }
  56. }
  57. /* Store result. */
  58. addr->ether_addr_octet[cnt] = number;
  59. }
  60. /* Looks like we allow garbage after last group?
  61. * "1:2:3:4:5:66anything_at_all"? */
  62. return addr;
  63. }
  64. libc_hidden_def(ether_aton_r)
  65. struct ether_addr *ether_aton(const char *asc)
  66. {
  67. static struct ether_addr result;
  68. return ether_aton_r(asc, &result);
  69. }
  70. char *ether_ntoa_r(const struct ether_addr *addr, char *buf)
  71. {
  72. sprintf(buf, "%x:%x:%x:%x:%x:%x",
  73. addr->ether_addr_octet[0], addr->ether_addr_octet[1],
  74. addr->ether_addr_octet[2], addr->ether_addr_octet[3],
  75. addr->ether_addr_octet[4], addr->ether_addr_octet[5]);
  76. return buf;
  77. }
  78. libc_hidden_def(ether_ntoa_r)
  79. char *ether_ntoa(const struct ether_addr *addr)
  80. {
  81. static char asc[18];
  82. return ether_ntoa_r(addr, asc);
  83. }