rpcd-mod-luci: let IPv4 hostnames take precedence over IPv6 ones

Do not overwrite IPv4-resolved hostnames with IPv6 ones in case both are
available or resolvable.

Signed-off-by: Jo-Philipp Wich <[email protected]>
(cherry picked from commit 93bd93e220714276eff95ea51793bb2f826328e8)

diff --git a/libs/rpcd-mod-luci/src/luci.c b/libs/rpcd-mod-luci/src/luci.c
index eb6f58803e86e9c5fd0e5ca0be2e06dbcf9205ca..b89bca494d42c6eec6ae231dd000989be86c251d 100644 (file)
--- a/libs/rpcd-mod-luci/src/luci.c
+++ b/libs/rpcd-mod-luci/src/luci.c
@@ -1672,8 +1672,9 @@ rpc_luci_get_host_hints_rrdns_cb(struct ubus_request *req, int type,
                                avl_for_each_element(&rctx->avl, hint, avl) {
                                        avl_for_each_element(&hint->ip6addrs, addr, avl) {
                                                if (!memcmp(&addr->addr.in6, &in6, sizeof(in6))) {
-                                                       free(hint->hostname);
-                                                       hint->hostname = strdup(blobmsg_get_string(cur));
+                                                       if (!hint->hostname)
+                                                               hint->hostname = strdup(blobmsg_get_string(cur));
+
                                                        break;
                                                }
                                        }