nsz Git - musl/blob - src/network/res_query.c

   1 #define _GNU_SOURCE
   2 #include <netdb.h>
   3 #include "__dns.h"
   4 #include "libc.h"
   5
   6 int res_query(const char *name, int class, int type, unsigned char *dest, int len)
   7 {
   8         if (class != 1 || len < 512)
   9                 return -1;
  10         switch(__dns_doqueries(dest, name, &type, 1)) {
  11         case EAI_NONAME:
  12                 h_errno = HOST_NOT_FOUND;
  13                 return -1;
  14         case EAI_AGAIN:
  15                 h_errno = TRY_AGAIN;
  16                 return -1;
  17         case EAI_FAIL:
  18                 h_errno = NO_RECOVERY;
  19                 return -1;
  20         }
  21         return 512;
  22 }
  23
  24 weak_alias(res_query, res_search);