1#define _BSD_SOURCE
 2#include <resolv.h>
 3#include <netdb.h>
 4
 5int res_query(const char *name, int class, int type, unsigned char *dest, int len)
 6{
 7	unsigned char q[280];
 8	int ql = __res_mkquery(0, name, class, type, 0, 0, 0, q, sizeof q);
 9	if (ql < 0) return ql;
10	int r = __res_send(q, ql, dest, len);
11	if (r<12) {
12		h_errno = TRY_AGAIN;
13		return -1;
14	}
15	if ((dest[3] & 15) == 3) {
16		h_errno = HOST_NOT_FOUND;
17		return -1;
18	}
19	if ((dest[3] & 15) == 0 && !dest[6] && !dest[7]) {
20		h_errno = NO_DATA;
21		return -1;
22	}
23	return r;
24}
25
26weak_alias(res_query, res_search);