5 static struct ubus_msg_buf *retmsg;
6 static int *retmsg_data;
7 static struct avl_tree clients;
9 static struct blob_attr *attrbuf[UBUS_ATTR_MAX];
11 typedef int (*ubus_cmd_cb)(struct ubus_client *cl, struct ubus_msg_buf *ub, struct blob_attr **attr);
13 static const struct blob_attr_info ubus_policy[UBUS_ATTR_MAX] = {
14 [UBUS_ATTR_SIGNATURE] = { .type = BLOB_ATTR_NESTED },
15 [UBUS_ATTR_OBJTYPE] = { .type = BLOB_ATTR_INT32 },
16 [UBUS_ATTR_OBJPATH] = { .type = BLOB_ATTR_STRING },
17 [UBUS_ATTR_OBJID] = { .type = BLOB_ATTR_INT32 },
18 [UBUS_ATTR_STATUS] = { .type = BLOB_ATTR_INT32 },
21 static struct blob_attr **ubus_parse_msg(struct blob_attr *msg)
23 blob_parse(msg, attrbuf, ubus_policy, UBUS_ATTR_MAX);
27 static void ubus_msg_init(struct ubus_msg_buf *ub, uint8_t type, uint16_t seq, uint32_t peer)
35 static struct ubus_msg_buf *ubus_msg_from_blob(bool shared)
37 return ubus_msg_new(b.head, blob_raw_len(b.head), shared);
40 static struct ubus_msg_buf *ubus_reply_from_blob(struct ubus_msg_buf *ub, bool shared)
42 struct ubus_msg_buf *new;
44 new = ubus_msg_from_blob(shared);
48 ubus_msg_init(new, UBUS_MSG_DATA, ub->hdr.seq, ub->hdr.peer);
52 static bool ubusd_send_hello(struct ubus_client *cl)
54 struct ubus_msg_buf *ub;
57 ub = ubus_msg_from_blob(true);
61 ubus_msg_init(ub, UBUS_MSG_HELLO, 0, cl->id.id);
62 ubus_msg_send(cl, ub, true);
66 static int ubusd_send_pong(struct ubus_client *cl, struct ubus_msg_buf *ub, struct blob_attr **attr)
68 ub->hdr.type = UBUS_MSG_DATA;
69 ubus_msg_send(cl, ub, false);
73 static int ubusd_handle_remove_object(struct ubus_client *cl, struct ubus_msg_buf *ub, struct blob_attr **attr)
75 struct ubus_object *obj;
77 if (!attr[UBUS_ATTR_OBJID])
78 return UBUS_STATUS_INVALID_ARGUMENT;
80 obj = ubusd_find_object(blob_get_u32(attr[UBUS_ATTR_OBJID]));
82 return UBUS_STATUS_NOT_FOUND;
84 if (obj->client != cl)
85 return UBUS_STATUS_PERMISSION_DENIED;
88 blob_put_int32(&b, UBUS_ATTR_OBJID, obj->id.id);
90 /* check if we're removing the object type as well */
91 if (obj->type && obj->type->refcount == 1)
92 blob_put_int32(&b, UBUS_ATTR_OBJTYPE, obj->type->id.id);
94 ubusd_free_object(obj);
96 ub = ubus_reply_from_blob(ub, true);
98 return UBUS_STATUS_NO_DATA;
100 ubus_msg_send(cl, ub, true);
104 static int ubusd_handle_add_object(struct ubus_client *cl, struct ubus_msg_buf *ub, struct blob_attr **attr)
106 struct ubus_object *obj;
108 obj = ubusd_create_object(cl, attr);
110 return UBUS_STATUS_INVALID_ARGUMENT;
112 blob_buf_init(&b, 0);
113 blob_put_int32(&b, UBUS_ATTR_OBJID, obj->id.id);
114 if (attr[UBUS_ATTR_SIGNATURE])
115 blob_put_int32(&b, UBUS_ATTR_OBJTYPE, obj->type->id.id);
117 ub = ubus_reply_from_blob(ub, true);
119 return UBUS_STATUS_NO_DATA;
121 ubus_msg_send(cl, ub, true);
125 static void ubusd_send_obj(struct ubus_client *cl, struct ubus_msg_buf *ub, struct ubus_object *obj)
127 struct ubus_method *m;
130 blob_buf_init(&b, 0);
133 blob_put_string(&b, UBUS_ATTR_OBJPATH, obj->path.key);
134 blob_put_int32(&b, UBUS_ATTR_OBJID, obj->id.id);
135 blob_put_int32(&b, UBUS_ATTR_OBJTYPE, obj->type->id.id);
137 s = blob_nest_start(&b, UBUS_ATTR_SIGNATURE);
138 list_for_each_entry(m, &obj->type->methods, list)
139 blob_put(&b, blob_id(m->data), blob_data(m->data), blob_len(m->data));
140 blob_nest_end(&b, s);
142 ub = ubus_reply_from_blob(ub, true);
146 ubus_msg_send(cl, ub, true);
149 static int ubusd_handle_lookup(struct ubus_client *cl, struct ubus_msg_buf *ub, struct blob_attr **attr)
151 struct ubus_object *obj;
153 bool wildcard = false;
157 if (!attr[UBUS_ATTR_OBJPATH]) {
158 avl_for_each_element(&path, obj, path)
159 ubusd_send_obj(cl, ub, obj);
163 objpath = blob_data(attr[UBUS_ATTR_OBJPATH]);
164 len = strlen(objpath);
165 if (objpath[len - 1] != '*') {
166 obj = avl_find_element(&path, objpath, obj, path);
168 return UBUS_STATUS_NOT_FOUND;
170 ubusd_send_obj(cl, ub, obj);
177 obj = avl_find_ge_element(&path, objpath, obj, path);
179 return UBUS_STATUS_NOT_FOUND;
181 while (!strncmp(objpath, obj->path.key, len)) {
183 ubusd_send_obj(cl, ub, obj);
184 if (obj == avl_last_element(&path, obj, path))
186 obj = avl_next_element(obj, path);
190 return UBUS_STATUS_NOT_FOUND;
195 static int ubusd_handle_invoke(struct ubus_client *cl, struct ubus_msg_buf *ub, struct blob_attr **attr)
197 struct ubus_object *obj = NULL;
201 if (!attr[UBUS_ATTR_METHOD] || !attr[UBUS_ATTR_OBJID])
202 return UBUS_STATUS_INVALID_ARGUMENT;
204 id = ubus_find_id(&objects, blob_get_u32(attr[UBUS_ATTR_OBJID]));
206 return UBUS_STATUS_NOT_FOUND;
208 obj = container_of(id, struct ubus_object, id);
210 method = blob_data(attr[UBUS_ATTR_METHOD]);
213 return obj->recv_msg(cl, method, attr[UBUS_ATTR_DATA]);
215 blob_buf_init(&b, 0);
216 blob_put_int32(&b, UBUS_ATTR_OBJID, obj->id.id);
217 blob_put_string(&b, UBUS_ATTR_METHOD, method);
218 if (attr[UBUS_ATTR_DATA])
219 blob_put(&b, UBUS_ATTR_DATA, blob_data(attr[UBUS_ATTR_DATA]),
220 blob_len(attr[UBUS_ATTR_DATA]));
224 ub = ubus_reply_from_blob(ub, true);
226 return UBUS_STATUS_NO_DATA;
228 ub->hdr.type = UBUS_MSG_INVOKE;
229 ub->hdr.peer = cl->id.id;
230 ubus_msg_send(obj->client, ub, true);
235 static struct ubus_client *ubusd_get_client_by_id(uint32_t id)
237 struct ubus_id *clid;
239 clid = ubus_find_id(&clients, id);
243 return container_of(clid, struct ubus_client, id);
246 static int ubusd_handle_response(struct ubus_client *cl, struct ubus_msg_buf *ub, struct blob_attr **attr)
248 struct ubus_object *obj;
250 if (!attr[UBUS_ATTR_OBJID] ||
251 (ub->hdr.type == UBUS_MSG_STATUS && !attr[UBUS_ATTR_STATUS]) ||
252 (ub->hdr.type == UBUS_MSG_DATA && !attr[UBUS_ATTR_DATA]))
255 obj = ubusd_find_object(blob_get_u32(attr[UBUS_ATTR_OBJID]));
259 if (cl != obj->client)
262 cl = ubusd_get_client_by_id(ub->hdr.peer);
266 ub->hdr.peer = blob_get_u32(attr[UBUS_ATTR_OBJID]);
267 ubus_msg_send(cl, ub, true);
275 static const ubus_cmd_cb handlers[__UBUS_MSG_LAST] = {
276 [UBUS_MSG_PING] = ubusd_send_pong,
277 [UBUS_MSG_ADD_OBJECT] = ubusd_handle_add_object,
278 [UBUS_MSG_REMOVE_OBJECT] = ubusd_handle_remove_object,
279 [UBUS_MSG_LOOKUP] = ubusd_handle_lookup,
280 [UBUS_MSG_INVOKE] = ubusd_handle_invoke,
281 [UBUS_MSG_STATUS] = ubusd_handle_response,
282 [UBUS_MSG_DATA] = ubusd_handle_response,
285 void ubusd_proto_receive_message(struct ubus_client *cl, struct ubus_msg_buf *ub)
287 ubus_cmd_cb cb = NULL;
290 retmsg->hdr.seq = ub->hdr.seq;
291 retmsg->hdr.peer = ub->hdr.peer;
293 if (ub->hdr.type < __UBUS_MSG_LAST)
294 cb = handlers[ub->hdr.type];
297 ret = cb(cl, ub, ubus_parse_msg(ub->data));
299 ret = UBUS_STATUS_INVALID_COMMAND;
306 *retmsg_data = htonl(ret);
307 ubus_msg_send(cl, retmsg, false);
310 struct ubus_client *ubusd_proto_new_client(int fd, uloop_fd_handler cb)
312 struct ubus_client *cl;
314 cl = calloc(1, sizeof(*cl));
318 INIT_LIST_HEAD(&cl->objects);
322 if (!ubus_alloc_id(&clients, &cl->id, 0))
325 if (!ubusd_send_hello(cl))
331 ubus_free_id(&clients, &cl->id);
337 void ubusd_proto_free_client(struct ubus_client *cl)
339 struct ubus_object *obj;
341 while (!list_empty(&cl->objects)) {
342 obj = list_first_entry(&cl->objects, struct ubus_object, list);
343 ubusd_free_object(obj);
346 ubus_free_id(&clients, &cl->id);
349 static void __init ubusd_proto_init(void)
351 ubus_init_id_tree(&clients);
353 blob_buf_init(&b, 0);
354 blob_put_int32(&b, UBUS_ATTR_STATUS, 0);
356 retmsg = ubus_msg_from_blob(false);
360 retmsg->hdr.type = UBUS_MSG_STATUS;
361 retmsg_data = blob_data(blob_data(retmsg->data));