resolved: move dns_type_to_af() to dns-type.c

src/resolve/dns-type.c

@@ -19,6 +19,8 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
+#include <sys/socket.h>
+
 #include "dns-type.h"
 #include "string-util.h"
 
@@ -183,6 +185,23 @@ bool dns_type_is_obsolete(uint16_t type) {
                       DNS_TYPE_NULL);
 }
 
+int dns_type_to_af(uint16_t t) {
+        switch (t) {
+
+        case DNS_TYPE_A:
+                return AF_INET;
+
+        case DNS_TYPE_AAAA:
+                return AF_INET6;
+
+        case DNS_TYPE_ANY:
+                return AF_UNSPEC;
+
+        default:
+                return -EINVAL;
+        }
+}
+
 const char *dns_class_to_string(uint16_t class) {
 
         switch (class) {

src/resolve/dns-type.h

@@ -133,6 +133,7 @@ bool dns_type_is_dnssec(uint16_t type);
 bool dns_type_is_obsolete(uint16_t type);
 bool dns_type_may_wildcard(uint16_t type);
 bool dns_type_apex_only(uint16_t type);
+int dns_type_to_af(uint16_t t);
 
 bool dns_class_is_pseudo(uint16_t class);
 bool dns_class_is_valid_rr(uint16_t class);

src/resolve/resolved-dns-query.c

@@ -595,23 +595,6 @@ static DnsProtocol SYNTHESIZE_PROTOCOL(uint64_t flags) {
         return DNS_PROTOCOL_DNS;
 }
 
-static int dns_type_to_af(uint16_t t) {
-        switch (t) {
-
-        case DNS_TYPE_A:
-                return AF_INET;
-
-        case DNS_TYPE_AAAA:
-                return AF_INET6;
-
-        case DNS_TYPE_ANY:
-                return AF_UNSPEC;
-
-        default:
-                return -EINVAL;
-        }
-}
-
 static int synthesize_localhost_rr(DnsQuery *q, const DnsResourceKey *key, DnsAnswer **answer) {
         int r;