+static const struct proto_handler no_proto = {
+ .name = "none",
+ .flags = PROTO_FLAG_IMMEDIATE,
+ .attach = default_proto_attach,
+};
+
+static const struct proto_handler *
+get_proto_handler(const char *name)
+{
+ struct proto_handler *proto;
+
+ if (!strcmp(name, "none"))
+ return &no_proto;
+
+ if (!handlers.comp)
+ return NULL;
+
+ return avl_find_element(&handlers, name, proto, avl);
+}
+
+void
+proto_init_interface(struct interface *iface, struct blob_attr *attr)
+{
+ const struct proto_handler *proto = iface->proto_handler;
+ struct interface_proto_state *state = NULL;
+
+ if (!proto)
+ proto = &no_proto;
+
+ state = proto->attach(proto, iface, attr);
+ if (!state) {
+ state = no_proto.attach(&no_proto, iface, attr);
+ state->cb = invalid_proto_handler;
+ }
+
+ state->handler = proto;
+ interface_set_proto_state(iface, state);
+}
+
+void
+proto_attach_interface(struct interface *iface, const char *proto_name)
+{
+ const struct proto_handler *proto = NULL;
+
+ if (!proto_name) {
+ interface_add_error(iface, "proto", "NO_PROTO", NULL, 0);
+ return;
+ }
+
+ proto = get_proto_handler(proto_name);
+ if (!proto) {
+ interface_add_error(iface, "proto", "INVALID_PROTO", NULL, 0);
+ proto = &no_proto;
+ }
+
+ iface->proto_handler = proto;
+}
+
+int
+interface_proto_event(struct interface_proto_state *proto,
+ enum interface_proto_cmd cmd, bool force)