adapt res_msend DNS query core for working with multiple sockets

[musl] / src / network / res_query.c

diff --git a/src/network/res_query.c b/src/network/res_query.c
index 4ebeb10..506dc23 100644 (file)
--- a/src/network/res_query.c
+++ b/src/network/res_query.c
@@ -1,20 +1,26 @@
+#define _BSD_SOURCE
+#include <resolv.h>
 #include <netdb.h>
-#include "__dns.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);