| 1 | #define _BSD_SOURCE |
| 2 | #include <resolv.h> |
| 3 | #include <netdb.h> |
| 4 | |
| 5 | int 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 | |
| 26 | weak_alias(res_query, res_search); |