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| | #define _BSD_SOURCE
#include <resolv.h>
#include <netdb.h>
int res_query(const char *name, int class, int type, unsigned char *dest, int len)
{
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;
}
if ((dest[3] & 15) == 3) {
h_errno = HOST_NOT_FOUND;
return -1;
}
if ((dest[3] & 15) == 0 && !dest[6] && !dest[7]) {
h_errno = NO_DATA;
return -1;
}
return r;
}
weak_alias(res_query, res_search);
|