Copy & paste is not allways the right way.
The previous patch for  netlink.c what not OK. The right patch is:



diff --git a/netlink.c b/netlink.c
index 1b5695c..445161d 100644
--- a/netlink.c
+++ b/netlink.c
@@ -365,3 +365,30 @@ int get_tq_netlink(const char *mesh_iface, const
struct ether_addr *mac,

        return 0;
 }
+
+int batadv_interface_check_netlink(const char *mesh_iface)
+{
+       struct get_tq_netlink_opts opts = {
+               .tq = 0,
+               .found = false,
+               .query_opts = {
+                       .err = 0,
+               },
+       };
+       int ret = 0;
+
+       memset(&opts.mac, 0, ETH_ALEN);
+
+       ret = netlink_query_common(mesh_iface,  BATADV_CMD_GET_ORIGINATORS,
+                                  get_tq_netlink_cb, &opts.query_opts);
+       if (ret < 0)
+               return ret;
+
+       memset(&opts.mac, 0, ETH_ALEN);
+       ret = netlink_query_common(mesh_iface,
BATADV_CMD_GET_TRANSTABLE_GLOBAL,
+                                  get_tq_netlink_cb, &opts.query_opts);
+
+       if (ret < 0)
+               return ret;
+       return 0;
+}