2 * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
3 * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU Lesser General Public License version 2.1
7 * as published by the Free Software Foundation
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
18 #include <libubox/blobmsg_json.h>
23 struct list_head list;
29 static struct ubus_event_handler watch_event;
30 static struct ubus_subscriber watch_subscribe;
31 static LIST_HEAD(watch_objects);
33 static void watch_subscribe_cb(struct ubus_context *ctx, struct ubus_event_handler *ev,
34 const char *type, struct blob_attr *msg)
36 static const struct blobmsg_policy policy = {
37 "path", BLOBMSG_TYPE_STRING
39 struct watch_object *o;
40 struct blob_attr *attr;
43 DEBUG(3, "ubus event %s\n", type);
44 if (strcmp(type, "ubus.object.add") != 0)
47 blobmsg_parse(&policy, 1, &attr, blob_data(msg), blob_len(msg));
51 path = blobmsg_data(attr);
52 DEBUG(3, "ubus path %s\n", path);
54 list_for_each_entry(o, &watch_objects, list) {
57 if (strcmp(o->name, path))
59 if (ubus_lookup_id(ctx, path, &id))
61 if (!ubus_subscribe(ctx, &watch_subscribe, id))
63 ERROR("failed to subscribe %d\n", id);
68 watch_add(const char *_name, void *id)
70 int len = strlen(_name);
72 struct watch_object *o = calloc_a(sizeof(*o), &name, len + 1);
77 list_add(&o->list, &watch_objects);
83 struct watch_object *t, *n;
85 list_for_each_entry_safe(t, n, &watch_objects, list) {
94 watch_notify_cb(struct ubus_context *ctx, struct ubus_object *obj,
95 struct ubus_request_data *req, const char *method,
96 struct blob_attr *msg)
101 str = blobmsg_format_json(msg, true);
102 DEBUG(3, "Received ubus notify '%s': %s\n", method, str);
106 trigger_event(method, msg);
111 watch_ubus(struct ubus_context *ctx)
113 watch_event.cb = watch_subscribe_cb;
114 watch_subscribe.cb = watch_notify_cb;
115 if (ubus_register_subscriber(ctx, &watch_subscribe))
116 ERROR("failed to register ubus subscriber\n");
117 if (ubus_register_event_handler(ctx, &watch_event, "ubus.object.add"))
118 ERROR("failed to add ubus event handler\n");