2 * Copyright (C) 2011 Felix Fietkau <nbd@openwrt.org>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU Lesser General Public License version 2.1
6 * as published by the Free Software Foundation
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
15 #include "ubusd_obj.h"
17 struct avl_tree obj_types;
18 struct avl_tree objects;
21 static void ubus_unref_object_type(struct ubus_object_type *type)
23 struct ubus_method *m;
25 if (--type->refcount > 0)
28 while (!list_empty(&type->methods)) {
29 m = list_first_entry(&type->methods, struct ubus_method, list);
34 ubus_free_id(&obj_types, &type->id);
38 static bool ubus_create_obj_method(struct ubus_object_type *type, struct blob_attr *attr)
40 struct ubus_method *m;
41 int bloblen = blob_raw_len(attr);
43 m = calloc(1, sizeof(*m) + bloblen);
47 list_add_tail(&m->list, &type->methods);
48 memcpy(m->data, attr, bloblen);
49 m->name = blobmsg_name(m->data);
54 static struct ubus_object_type *ubus_create_obj_type(struct blob_attr *sig)
56 struct ubus_object_type *type;
57 struct blob_attr *pos;
60 type = calloc(1, sizeof(*type));
63 if (!ubus_alloc_id(&obj_types, &type->id, 0))
66 INIT_LIST_HEAD(&type->methods);
68 blob_for_each_attr(pos, sig, rem) {
69 if (!blobmsg_check_attr(pos, true))
72 if (!ubus_create_obj_method(type, pos))
79 ubus_unref_object_type(type);
87 static struct ubus_object_type *ubus_get_obj_type(uint32_t obj_id)
89 struct ubus_object_type *type;
92 id = ubus_find_id(&obj_types, obj_id);
96 type = container_of(id, struct ubus_object_type, id);
101 struct ubus_object *ubusd_create_object_internal(struct ubus_object_type *type, uint32_t id)
103 struct ubus_object *obj;
105 obj = calloc(1, sizeof(*obj));
109 if (!ubus_alloc_id(&objects, &obj->id, id))
113 INIT_LIST_HEAD(&obj->list);
114 INIT_LIST_HEAD(&obj->events);
115 INIT_LIST_HEAD(&obj->subscribers);
116 INIT_LIST_HEAD(&obj->target_list);
127 struct ubus_object *ubusd_create_object(struct ubus_client *cl, struct blob_attr **attr)
129 struct ubus_object *obj;
130 struct ubus_object_type *type = NULL;
132 if (attr[UBUS_ATTR_OBJTYPE])
133 type = ubus_get_obj_type(blob_get_u32(attr[UBUS_ATTR_OBJTYPE]));
134 else if (attr[UBUS_ATTR_SIGNATURE])
135 type = ubus_create_obj_type(attr[UBUS_ATTR_SIGNATURE]);
137 obj = ubusd_create_object_internal(type, 0);
139 ubus_unref_object_type(type);
144 if (attr[UBUS_ATTR_OBJPATH]) {
145 obj->path.key = strdup(blob_data(attr[UBUS_ATTR_OBJPATH]));
149 if (avl_insert(&path, &obj->path) != 0) {
150 free((void *) obj->path.key);
151 obj->path.key = NULL;
154 ubusd_send_obj_event(obj, true);
158 list_add(&obj->list, &cl->objects);
163 ubusd_free_object(obj);
167 void ubus_subscribe(struct ubus_object *obj, struct ubus_object *target, const char *method)
169 struct ubus_subscription *s;
170 bool first = list_empty(&target->subscribers);
172 s = calloc(1, sizeof(*s) + strlen(method) + 1);
178 list_add(&s->list, &target->subscribers);
179 list_add(&s->target_list, &obj->target_list);
180 strcpy(s->method, method);
183 ubus_notify_subscription(target);
186 void ubus_unsubscribe(struct ubus_subscription *s)
188 struct ubus_object *obj = s->target;
191 list_del(&s->target_list);
194 if (list_empty(&obj->subscribers))
195 ubus_notify_subscription(obj);
198 void ubusd_free_object(struct ubus_object *obj)
200 struct ubus_subscription *s, *tmp;
202 list_for_each_entry_safe(s, tmp, &obj->target_list, target_list) {
205 list_for_each_entry_safe(s, tmp, &obj->subscribers, list) {
206 ubus_notify_unsubscribe(s);
209 ubusd_event_cleanup_object(obj);
211 ubusd_send_obj_event(obj, false);
212 avl_delete(&path, &obj->path);
213 free((void *) obj->path.key);
215 if (!list_empty(&obj->list))
216 list_del(&obj->list);
217 ubus_free_id(&objects, &obj->id);
219 ubus_unref_object_type(obj->type);
223 static void __init ubusd_obj_init(void)
225 ubus_init_id_tree(&objects);
226 ubus_init_id_tree(&obj_types);
227 ubus_init_string_tree(&path, false);