allow proto handlers to attach data items in notify

[project/netifd.git] / interface.c

diff --git a/interface.c b/interface.c
index 902f55b..c5addea 100644 (file)
--- a/interface.c
+++ b/interface.c
@@ -81,6 +81,42 @@ void interface_add_error(struct interface *iface, const char *subsystem,
 }
 
 static void
+interface_data_del(struct interface *iface, struct interface_data *data)
+{
+       avl_delete(&iface->data, &data->node);
+       free(data);
+}
+
+static void
+interface_data_flush(struct interface *iface)
+{
+       struct interface_data *d, *tmp;
+
+       avl_for_each_element_safe(&iface->data, d, node, tmp)
+               interface_data_del(iface, d);
+}
+
+int
+interface_add_data(struct interface *iface, const struct blob_attr *data)
+{
+       struct interface_data *n, *o;
+
+       if (!blobmsg_check_attr(data, true))
+               return UBUS_STATUS_INVALID_ARGUMENT;
+
+       n = calloc(1, sizeof(*data) + blob_pad_len(data));
+       memcpy(n->data, data, blob_pad_len(data));
+       n->node.key = blobmsg_name(data);
+
+       o = avl_find_element(&iface->data, n->node.key, o, node);
+       if (o)
+               interface_data_del(iface, o);
+
+       avl_insert(&iface->data, &n->node);
+       return 0;
+}
+
+static void
 interface_event(struct interface *iface, enum interface_event ev)
 {
        struct interface_user *dep, *tmp;
@@ -98,6 +134,7 @@ interface_flush_state(struct interface *iface)
                device_release(&iface->main_dev);
        if (iface->l3_dev.dev)
                device_release(&iface->l3_dev);
+       interface_data_flush(iface);
 }
 
 static void
@@ -318,6 +355,7 @@ interface_init(struct interface *iface, const char *name,
        INIT_LIST_HEAD(&iface->hotplug_list);
        interface_ip_init(&iface->proto_ip, iface);
        interface_ip_init(&iface->config_ip, iface);
+       avl_init(&iface->data, avl_strcmp, false, NULL);
        iface->config_ip.enabled = false;
 
        iface->main_dev.cb = interface_cb;