/crypto/heimdal/lib/roken/getipnodebyname.c

https://bitbucket.org/freebsd/freebsd-head/ · C · 83 lines · 41 code · 6 blank · 36 comment · 7 complexity · 2b5a1362df68887968beed4f757e159d MD5 · raw file

  1. /*
  2. * Copyright (c) 1999 Kungliga Tekniska Hรถgskolan
  3. * (Royal Institute of Technology, Stockholm, Sweden).
  4. * All rights reserved.
  5. *
  6. * Redistribution and use in source and binary forms, with or without
  7. * modification, are permitted provided that the following conditions
  8. * are met:
  9. *
  10. * 1. Redistributions of source code must retain the above copyright
  11. * notice, this list of conditions and the following disclaimer.
  12. *
  13. * 2. Redistributions in binary form must reproduce the above copyright
  14. * notice, this list of conditions and the following disclaimer in the
  15. * documentation and/or other materials provided with the distribution.
  16. *
  17. * 3. Neither the name of the Institute nor the names of its contributors
  18. * may be used to endorse or promote products derived from this software
  19. * without specific prior written permission.
  20. *
  21. * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22. * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23. * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24. * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25. * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26. * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27. * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28. * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29. * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30. * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31. * SUCH DAMAGE.
  32. */
  33. #include <config.h>
  34. #include "roken.h"
  35. #ifndef HAVE_H_ERRNO
  36. static int h_errno = NO_RECOVERY;
  37. #endif
  38. /*
  39. * lookup `name' (address family `af') in DNS and return a pointer
  40. * to a malloced struct hostent or NULL.
  41. */
  42. ROKEN_LIB_FUNCTION struct hostent * ROKEN_LIB_CALL
  43. getipnodebyname (const char *name, int af, int flags, int *error_num)
  44. {
  45. struct hostent *tmp;
  46. #ifdef HAVE_GETHOSTBYNAME2
  47. tmp = gethostbyname2 (name, af);
  48. #else
  49. if (af != AF_INET) {
  50. *error_num = NO_ADDRESS;
  51. return NULL;
  52. }
  53. tmp = gethostbyname (name);
  54. #endif
  55. if (tmp == NULL) {
  56. switch (h_errno) {
  57. case HOST_NOT_FOUND :
  58. case TRY_AGAIN :
  59. case NO_RECOVERY :
  60. *error_num = h_errno;
  61. break;
  62. case NO_DATA :
  63. *error_num = NO_ADDRESS;
  64. break;
  65. default :
  66. *error_num = NO_RECOVERY;
  67. break;
  68. }
  69. return NULL;
  70. }
  71. tmp = copyhostent (tmp);
  72. if (tmp == NULL) {
  73. *error_num = TRY_AGAIN;
  74. return NULL;
  75. }
  76. return tmp;
  77. }