-#define _GNU_SOURCE
+#define _BSD_SOURCE
#include <resolv.h>
#include <netdb.h>
-#include "__dns.h"
-#include "libc.h"
int res_query(const char *name, int class, int type, unsigned char *dest, int len)
{
- if (class != 1 || len < 512)
+ unsigned char q[280];
+ int ql = __res_mkquery(0, name, class, type, 0, 0, 0, q, sizeof q);
+ if (ql < 0) return ql;
+ int r = __res_send(q, ql, dest, len);
+ if (r<12) {
+ h_errno = TRY_AGAIN;
return -1;
- switch(__dns_doqueries(dest, name, &type, 1)) {
- case EAI_NONAME:
+ }
+ if ((dest[3] & 15) == 3) {
h_errno = HOST_NOT_FOUND;
return -1;
- case EAI_AGAIN:
- h_errno = TRY_AGAIN;
- return -1;
- case EAI_FAIL:
- h_errno = NO_RECOVERY;
+ }
+ if ((dest[3] & 15) == 0 && !dest[6] && !dest[7]) {
+ h_errno = NO_DATA;
return -1;
}
- return 512;
+ return r;
}
weak_alias(res_query, res_search);