ubus: add notification for subscribers present/gone

[project/ubus.git] / libubus-sub.c

diff --git a/libubus-sub.c b/libubus-sub.c
index 2bfb483..87c8128 100644 (file)
--- a/libubus-sub.c
+++ b/libubus-sub.c
@@ -91,4 +91,22 @@ void __hidden ubus_process_unsubscribe(struct ubus_context *ctx, struct ubus_msg
        s->remove_cb(ctx, s, blob_get_u32(attrbuf[UBUS_ATTR_TARGET]));
 }
 
+void __hidden ubus_process_notify(struct ubus_context *ctx, struct ubus_msghdr *hdr)
+{
+       struct blob_attr **attrbuf;
+       struct ubus_object *obj;
+       uint32_t objid;
+
+       attrbuf = ubus_parse_msg(hdr->data);
+       if (!attrbuf[UBUS_ATTR_OBJID] || !attrbuf[UBUS_ATTR_ACTIVE])
+               return;
 
+       objid = blob_get_u32(attrbuf[UBUS_ATTR_OBJID]);
+       obj = avl_find_element(&ctx->objects, &objid, obj, avl);
+       if (!obj)
+               return;
+
+       obj->has_subscribers = blob_get_u8(attrbuf[UBUS_ATTR_ACTIVE]);
+       if (obj->subscribe_cb)
+               obj->subscribe_cb(ctx, obj);
+}