+invalid_proto_handler(struct interface_proto_state *proto,
+ enum interface_proto_cmd cmd, bool force)
+{
+ return -1;
+}
+
+static int
+no_proto_handler(struct interface_proto_state *proto,
+ enum interface_proto_cmd cmd, bool force)
+{
+ return 0;
+}
+
+static struct interface_proto_state *
+get_default_proto(void)
+{
+ struct interface_proto_state *proto;
+
+ proto = calloc(1, sizeof(*proto));
+ proto->free = default_proto_free;
+ proto->flags = PROTO_FLAG_IMMEDIATE;
+
+ return proto;
+}
+
+struct proto_handler *
+get_proto_handler(const char *name)
+{
+ struct proto_handler *proto;
+
+ if (!handlers.comp)
+ return NULL;
+
+ return avl_find_element(&handlers, name, proto, avl);
+}
+
+void
+proto_attach_interface(struct interface *iface, struct uci_section *s)
+{
+ struct interface_proto_state *state = NULL;
+ struct proto_handler *proto = NULL;
+ const char *proto_name;
+ const char *error = NULL;
+
+ proto_name = uci_lookup_option_string(uci_ctx, s, "proto");
+ if (!proto_name) {
+ error = "NO_PROTO";
+ goto error;
+ }
+
+ if (!strcmp(proto_name, "none")) {
+ state = get_default_proto();
+ state->handler = no_proto_handler;
+ goto out;
+ }
+
+ proto = get_proto_handler(proto_name);
+ if (!proto) {
+ error = "INVALID_PROTO";
+ goto error;
+ }
+
+ state = proto->attach(proto, iface, s);
+
+error:
+ if (error) {
+ interface_add_error(iface, "proto", error, NULL, 0);
+ state = get_default_proto();
+ state->handler = invalid_proto_handler;
+ }
+
+out:
+ interface_set_proto_state(iface, state);
+}
+
+
+int
+interface_proto_event(struct interface_proto_state *proto,