include/arpa/nameser.h

   1 #include <resolv/arpa/nameser.h>
   2
   3 /* If the machine allows unaligned access we can do better than using
   4    the NS_GET16, NS_GET32, NS_PUT16, and NS_PUT32 macros from the
   5    installed header.  */
   6 #include <string.h>
   7 #include <stdint.h>
   8 #include <netinet/in.h>
   9
  10 extern struct _ns_flagdata _ns_flagdata[] attribute_hidden;
  11
  12 #if _STRING_ARCH_unaligned
  13
  14 # undef NS_GET16
  15 # define NS_GET16(s, cp) \
  16   do {                                                                        \
  17     uint16_t *t_cp = (uint16_t *) (cp);                                       \
  18     (s) = ntohs (*t_cp);                                                      \
  19     (cp) += NS_INT16SZ;                                                       \
  20   } while (0)
  21
  22 # undef NS_GET32
  23 # define NS_GET32(l, cp) \
  24   do {                                                                        \
  25     uint32_t *t_cp = (uint32_t *) (cp);                                       \
  26     (l) = ntohl (*t_cp);                                                      \
  27     (cp) += NS_INT32SZ;                                                       \
  28   } while (0)
  29
  30 # undef NS_PUT16
  31 # define NS_PUT16(s, cp) \
  32   do {                                                                        \
  33     uint16_t *t_cp = (uint16_t *) (cp);                                       \
  34     *t_cp = htons (s);                                                        \
  35     (cp) += NS_INT16SZ;                                                       \
  36   } while (0)
  37
  38 # undef NS_PUT32
  39 # define NS_PUT32(l, cp) \
  40   do {                                                                        \
  41     uint32_t *t_cp = (uint32_t *) (cp);                                       \
  42     *t_cp = htonl (l);                                                        \
  43     (cp) += NS_INT32SZ;                                                       \
  44   } while (0)
  45
  46 #endif