+static void
+ubus_event_handler(struct ubus_context *ctx, struct ubus_event_handler *ev,
+ const char *type, struct blob_attr *msg)
+{
+ struct ubus_lua_event *listener = container_of(ev, struct ubus_lua_event, e);
+
+ lua_getglobal(state, "__ubus_cb_event");
+ lua_rawgeti(state, -1, listener->r);
+ lua_remove(state, -2);
+
+ if (lua_isfunction(state, -1)) {
+ ubus_lua_parse_blob_array(state, blob_data(msg), blob_len(msg), true);
+ lua_call(state, 1, 0);
+ } else {
+ lua_pop(state, 1);
+ }
+}
+
+static struct ubus_event_handler*
+ubus_lua_load_event(lua_State *L)
+{
+ struct ubus_lua_event* event = NULL;
+
+ event = malloc(sizeof(struct ubus_lua_event));
+ if (!event)
+ return NULL;
+
+ memset(event, 0, sizeof(struct ubus_lua_event));
+ event->e.cb = ubus_event_handler;
+
+ /* update the he callback lookup table */
+ lua_getglobal(L, "__ubus_cb_event");
+ lua_pushvalue(L, -2);
+ event->r = luaL_ref(L, -2);
+ lua_setfield(L, -1, lua_tostring(L, -3));
+
+ return &event->e;
+}
+
+static int
+ubus_lua_listen(lua_State *L) {
+ struct ubus_lua_connection *c = luaL_checkudata(L, 1, METANAME);
+
+ /* verify top level object */
+ luaL_checktype(L, 2, LUA_TTABLE);
+
+ /* scan each object */
+ lua_pushnil(L);
+ while (lua_next(L, -2) != 0) {
+ struct ubus_event_handler *listener;
+
+ /* check if the key is a string and the value is a method */
+ if ((lua_type(L, -2) == LUA_TSTRING) && (lua_type(L, -1) == LUA_TFUNCTION)) {
+ listener = ubus_lua_load_event(L);
+ if(listener != NULL) {
+ ubus_register_event_handler(c->ctx, listener, lua_tostring(L, -2));
+ }
+ }
+ lua_pop(L, 1);
+ }
+ return 0;
+}
+
+static void
+ubus_sub_remove_handler(struct ubus_context *ctx, struct ubus_subscriber *s,
+ uint32_t id)
+{
+ struct ubus_lua_subscriber *sub;
+
+ sub = container_of(s, struct ubus_lua_subscriber, s);
+
+ lua_getglobal(state, "__ubus_cb_subscribe");
+ lua_rawgeti(state, -1, sub->rremove);
+ lua_remove(state, -2);
+
+ if (lua_isfunction(state, -1)) {
+ lua_call(state, 0, 0);
+ } else {
+ lua_pop(state, 1);
+ }
+}
+
+static int
+ubus_sub_notify_handler(struct ubus_context *ctx, struct ubus_object *obj,
+ struct ubus_request_data *req, const char *method,
+ struct blob_attr *msg)
+{
+ struct ubus_subscriber *s;
+ struct ubus_lua_subscriber *sub;
+
+ s = container_of(obj, struct ubus_subscriber, obj);
+ sub = container_of(s, struct ubus_lua_subscriber, s);
+
+ lua_getglobal(state, "__ubus_cb_subscribe");
+ lua_rawgeti(state, -1, sub->rnotify);
+ lua_remove(state, -2);
+
+ if (lua_isfunction(state, -1)) {
+ if( msg ){
+ ubus_lua_parse_blob_array(state, blob_data(msg), blob_len(msg), true);
+ lua_call(state, 1, 0);
+ } else {
+ lua_call(state, 0, 0);
+ }
+ } else {
+ lua_pop(state, 1);
+ }
+
+ return 0;
+}
+
+
+
+static void
+ubus_lua_do_subscribe( struct ubus_context *ctx, lua_State *L, const char* target,
+ int idxnotify, int idxremove )
+{
+ uint32_t id;
+ int status;
+ struct ubus_lua_subscriber *sub;
+
+ if( ( status = ubus_lookup_id( ctx, target, &id ) ) ){
+ lua_pushfstring( L, "Unable find target, status=%d", status );
+ lua_error( L );
+ }
+
+ sub = malloc( sizeof( struct ubus_lua_subscriber ) );
+ memset( sub, 0, sizeof( struct ubus_lua_subscriber ) );
+ if( !sub ){
+ lua_pushstring( L, "Out of memory" );
+ lua_error( L );
+ }
+
+ if( idxnotify ){
+ lua_getglobal(L, "__ubus_cb_subscribe");
+ lua_pushvalue(L, idxnotify);
+ sub->rnotify = luaL_ref(L, -2);
+ lua_pop(L, 1);
+ sub->s.cb = ubus_sub_notify_handler;
+ }
+
+ if( idxremove ){
+ lua_getglobal(L, "__ubus_cb_subscribe");
+ lua_pushvalue(L, idxnotify);
+ sub->rnotify = luaL_ref(L, -2);
+ lua_pop(L, 1);
+ sub->s.remove_cb = ubus_sub_remove_handler;
+ }
+
+ if( ( status = ubus_register_subscriber( ctx, &sub->s ) ) ){
+ lua_pushfstring( L, "Failed to register subscriber, status=%d", status );
+ lua_error( L );
+ }
+
+ if( ( status = ubus_subscribe( ctx, &sub->s, id) ) ){
+ lua_pushfstring( L, "Failed to register subscriber, status=%d", status );
+ lua_error( L );
+ }
+}
+
+static int
+ubus_lua_subscribe(lua_State *L) {
+ int idxnotify, idxremove, stackstart;
+ struct ubus_lua_connection *c;
+ const char* target;
+
+ idxnotify = idxremove = 0;
+ stackstart = lua_gettop( L );
+
+
+ c = luaL_checkudata(L, 1, METANAME);
+ target = luaL_checkstring(L, 2);
+ luaL_checktype(L, 3, LUA_TTABLE);
+
+
+ lua_pushstring( L, "notify");
+ lua_gettable( L, 3 );
+ if( lua_type( L, -1 ) == LUA_TFUNCTION ){
+ idxnotify = lua_gettop( L );
+ } else {
+ lua_pop( L, 1 );
+ }
+
+ lua_pushstring( L, "remove");
+ lua_gettable( L, 3 );
+ if( lua_type( L, -1 ) == LUA_TFUNCTION ){
+ idxremove = lua_gettop( L );
+ } else {
+ lua_pop( L, 1 );
+ }
+
+ if( idxnotify )
+ ubus_lua_do_subscribe( c->ctx, L, target, idxnotify, idxremove );
+
+ if( lua_gettop( L ) > stackstart )
+ lua_pop( L, lua_gettop( L ) - stackstart );
+
+ return 0;
+}
+
+static int
+ubus_lua_send(lua_State *L)
+{
+ struct ubus_lua_connection *c = luaL_checkudata(L, 1, METANAME);
+ const char *event = luaL_checkstring(L, 2);
+
+ if (*event == 0)
+ return luaL_argerror(L, 2, "no event name");
+
+ // Event content convert to ubus form
+ luaL_checktype(L, 3, LUA_TTABLE);
+ blob_buf_init(&c->buf, 0);
+
+ if (!ubus_lua_format_blob_array(L, &c->buf, true)) {
+ lua_pushnil(L);
+ lua_pushinteger(L, UBUS_STATUS_INVALID_ARGUMENT);
+ return 2;
+ }
+
+ // Send the event
+ ubus_send_event(c->ctx, event, c->buf.head);
+
+ return 0;
+}
+
+