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 = *asc++;
  35. if (ch < 0x20)
  36. return NULL;
  37. /* | 0x20 is cheap tolower(), valid for letters/numbers only */
  38. ch |= 0x20;
  39. if ((ch < '0' || ch > '9') && (ch < 'a' || ch > 'f'))
  40. return NULL;
  41. number = !(ch > '9') ? (ch - '0') : (ch - 'a' + 10);
  42. ch = *asc++;
  43. if ((cnt != 5 && ch != ':') /* not last group */
  44. /* What standard says ASCII ether address representation
  45. * may also finish with whitespace, not only NUL?
  46. * We can get rid of isspace() otherwise */
  47. || (cnt == 5 && ch != '\0' /*&& !isspace(ch)*/)
  48. ) {
  49. ch |= 0x20; /* cheap tolower() */
  50. if ((ch < '0' || ch > '9') && (ch < 'a' || ch > 'f'))
  51. return NULL;
  52. number = (number << 4) + (!(ch > '9') ? (ch - '0') : (ch - 'a' + 10));
  53. if (cnt != 5) {
  54. ch = *asc++;
  55. if (ch != ':')
  56. return NULL;
  57. }
  58. }
  59. /* Store result. */
  60. addr->ether_addr_octet[cnt] = number;
  61. }
  62. /* Looks like we allow garbage after last group?
  63. * "1:2:3:4:5:66anything_at_all"? */
  64. return addr;
  65. }
  66. libc_hidden_def(ether_aton_r)
  67. struct ether_addr *ether_aton(const char *asc)
  68. {
  69. static struct ether_addr result;
  70. return ether_aton_r(asc, &result);
  71. }
  72. char *ether_ntoa_r(const struct ether_addr *addr, char *buf)
  73. {
  74. sprintf(buf, "%x:%x:%x:%x:%x:%x",
  75. addr->ether_addr_octet[0], addr->ether_addr_octet[1],
  76. addr->ether_addr_octet[2], addr->ether_addr_octet[3],
  77. addr->ether_addr_octet[4], addr->ether_addr_octet[5]);
  78. return buf;
  79. }
  80. libc_hidden_def(ether_ntoa_r)
  81. char *ether_ntoa(const struct ether_addr *addr)
  82. {
  83. static char asc[18];
  84. return ether_ntoa_r(addr, asc);
  85. }