4 static struct blob_buf b;
5 static struct ubus_msg_buf *retmsg;
6 static int *retmsg_data;
8 static struct blob_attr *attrbuf[UBUS_ATTR_MAX];
10 typedef int (*ubus_cmd_cb)(struct ubus_client *cl, struct ubus_msg_buf *ub, struct blob_attr **attr);
12 static const struct blob_attr_info ubus_policy[UBUS_ATTR_MAX] = {
13 [UBUS_ATTR_SIGNATURE] = { .type = BLOB_ATTR_NESTED },
14 [UBUS_ATTR_OBJTYPE] = { .type = BLOB_ATTR_INT32 },
15 [UBUS_ATTR_OBJPATH] = { .type = BLOB_ATTR_STRING },
16 [UBUS_ATTR_OBJID] = { .type = BLOB_ATTR_INT32 },
17 [UBUS_ATTR_STATUS] = { .type = BLOB_ATTR_INT32 },
20 struct blob_attr **ubus_parse_msg(struct blob_attr *msg)
22 blob_parse(msg, attrbuf, ubus_policy, UBUS_ATTR_MAX);
26 static void ubus_msg_init(struct ubus_msg_buf *ub, uint8_t type, uint16_t seq, uint32_t peer)
34 static struct ubus_msg_buf *ubus_msg_from_blob(bool shared)
36 return ubus_msg_new(b.head, blob_raw_len(b.head), shared);
39 static struct ubus_msg_buf *ubus_reply_from_blob(struct ubus_msg_buf *ub, bool shared)
41 struct ubus_msg_buf *new;
43 new = ubus_msg_new(b.head, blob_raw_len(b.head), shared);
47 ubus_msg_init(new, UBUS_MSG_DATA, ub->hdr.seq, ub->hdr.peer);
51 bool ubusd_send_hello(struct ubus_client *cl)
53 struct ubus_msg_buf *ub;
56 ub = ubus_msg_from_blob(true);
60 ubus_msg_init(ub, UBUS_MSG_HELLO, 0, cl->id.id);
61 ubus_msg_send(cl, ub, true);
65 static int ubusd_send_pong(struct ubus_client *cl, struct ubus_msg_buf *ub, struct blob_attr **attr)
67 ub->hdr.type = UBUS_MSG_DATA;
68 ubus_msg_send(cl, ub, false);
72 static int ubusd_handle_remove_object(struct ubus_client *cl, struct ubus_msg_buf *ub, struct blob_attr **attr)
74 struct ubus_object *obj;
76 if (!attr[UBUS_ATTR_OBJID])
77 return UBUS_STATUS_INVALID_ARGUMENT;
79 obj = ubusd_find_object(blob_get_u32(attr[UBUS_ATTR_OBJID]));
81 return UBUS_STATUS_NOT_FOUND;
83 if (obj->client != cl)
84 return UBUS_STATUS_PERMISSION_DENIED;
87 blob_put_int32(&b, UBUS_ATTR_OBJID, obj->id.id);
89 /* check if we're removing the object type as well */
90 if (obj->type && obj->type->refcount == 1)
91 blob_put_int32(&b, UBUS_ATTR_OBJTYPE, obj->type->id.id);
93 ubusd_free_object(obj);
95 ub = ubus_reply_from_blob(ub, true);
97 return UBUS_STATUS_NO_DATA;
99 ubus_msg_send(cl, ub, true);
103 static int ubusd_handle_add_object(struct ubus_client *cl, struct ubus_msg_buf *ub, struct blob_attr **attr)
105 struct ubus_object *obj;
107 obj = ubusd_create_object(cl, attr);
109 return UBUS_STATUS_INVALID_ARGUMENT;
111 blob_buf_init(&b, 0);
112 blob_put_int32(&b, UBUS_ATTR_OBJID, obj->id.id);
113 if (attr[UBUS_ATTR_SIGNATURE])
114 blob_put_int32(&b, UBUS_ATTR_OBJTYPE, obj->type->id.id);
116 ub = ubus_reply_from_blob(ub, true);
118 return UBUS_STATUS_NO_DATA;
120 ubus_msg_send(cl, ub, true);
124 static void ubusd_send_obj(struct ubus_client *cl, struct ubus_msg_buf *ub, struct ubus_object *obj)
126 struct ubus_method *m;
129 blob_buf_init(&b, 0);
132 blob_put_string(&b, UBUS_ATTR_OBJPATH, obj->path.key);
133 blob_put_int32(&b, UBUS_ATTR_OBJID, obj->id.id);
134 blob_put_int32(&b, UBUS_ATTR_OBJTYPE, obj->type->id.id);
136 s = blob_nest_start(&b, UBUS_ATTR_SIGNATURE);
137 list_for_each_entry(m, &obj->type->methods, list)
138 blob_put(&b, blob_id(m->data), blob_data(m->data), blob_len(m->data));
139 blob_nest_end(&b, s);
141 ub = ubus_reply_from_blob(ub, true);
145 ubus_msg_send(cl, ub, true);
148 static int ubusd_handle_lookup(struct ubus_client *cl, struct ubus_msg_buf *ub, struct blob_attr **attr)
150 struct ubus_object *obj;
152 bool wildcard = false;
156 if (!attr[UBUS_ATTR_OBJPATH]) {
157 avl_for_each_element(&path, obj, path)
158 ubusd_send_obj(cl, ub, obj);
162 objpath = blob_data(attr[UBUS_ATTR_OBJPATH]);
163 len = strlen(objpath);
164 if (objpath[len - 1] != '*') {
165 obj = avl_find_element(&path, objpath, obj, path);
167 return UBUS_STATUS_NOT_FOUND;
169 ubusd_send_obj(cl, ub, obj);
176 obj = avl_find_ge_element(&path, objpath, obj, path);
178 return UBUS_STATUS_NOT_FOUND;
180 while (!strncmp(objpath, obj->path.key, len)) {
182 ubusd_send_obj(cl, ub, obj);
183 if (obj == avl_last_element(&path, obj, path))
185 obj = avl_next_element(obj, path);
189 return UBUS_STATUS_NOT_FOUND;
194 static int ubusd_handle_invoke(struct ubus_client *cl, struct ubus_msg_buf *ub, struct blob_attr **attr)
196 struct ubus_object *obj = NULL;
200 if (!attr[UBUS_ATTR_METHOD] || !attr[UBUS_ATTR_OBJID])
201 return UBUS_STATUS_INVALID_ARGUMENT;
203 id = ubus_find_id(&objects, blob_get_u32(attr[UBUS_ATTR_OBJID]));
205 return UBUS_STATUS_NOT_FOUND;
207 obj = container_of(id, struct ubus_object, id);
209 method = blob_data(attr[UBUS_ATTR_METHOD]);
212 return obj->recv_msg(cl, method, attr[UBUS_ATTR_DATA]);
214 blob_buf_init(&b, 0);
215 blob_put_int32(&b, UBUS_ATTR_OBJID, obj->id.id);
216 blob_put_string(&b, UBUS_ATTR_METHOD, method);
217 if (attr[UBUS_ATTR_DATA])
218 blob_put(&b, UBUS_ATTR_DATA, blob_data(attr[UBUS_ATTR_DATA]),
219 blob_len(attr[UBUS_ATTR_DATA]));
223 ub = ubus_reply_from_blob(ub, true);
225 return UBUS_STATUS_NO_DATA;
227 ub->hdr.type = UBUS_MSG_INVOKE;
228 ub->hdr.peer = cl->id.id;
229 ubus_msg_send(obj->client, ub, true);
234 static int ubusd_handle_response(struct ubus_client *cl, struct ubus_msg_buf *ub, struct blob_attr **attr)
236 struct ubus_object *obj;
238 if (!attr[UBUS_ATTR_OBJID] ||
239 (ub->hdr.type == UBUS_MSG_STATUS && !attr[UBUS_ATTR_STATUS]) ||
240 (ub->hdr.type == UBUS_MSG_DATA && !attr[UBUS_ATTR_DATA]))
243 obj = ubusd_find_object(blob_get_u32(attr[UBUS_ATTR_OBJID]));
247 if (cl != obj->client)
250 cl = ubusd_get_client_by_id(ub->hdr.peer);
254 ub->hdr.peer = blob_get_u32(attr[UBUS_ATTR_OBJID]);
255 ubus_msg_send(cl, ub, true);
263 static const ubus_cmd_cb handlers[__UBUS_MSG_LAST] = {
264 [UBUS_MSG_PING] = ubusd_send_pong,
265 [UBUS_MSG_ADD_OBJECT] = ubusd_handle_add_object,
266 [UBUS_MSG_REMOVE_OBJECT] = ubusd_handle_remove_object,
267 [UBUS_MSG_LOOKUP] = ubusd_handle_lookup,
268 [UBUS_MSG_INVOKE] = ubusd_handle_invoke,
269 [UBUS_MSG_STATUS] = ubusd_handle_response,
270 [UBUS_MSG_DATA] = ubusd_handle_response,
273 void ubusd_receive_message(struct ubus_client *cl, struct ubus_msg_buf *ub)
275 ubus_cmd_cb cb = NULL;
278 retmsg->hdr.seq = ub->hdr.seq;
279 retmsg->hdr.peer = ub->hdr.peer;
281 if (ub->hdr.type < __UBUS_MSG_LAST)
282 cb = handlers[ub->hdr.type];
285 ret = cb(cl, ub, ubus_parse_msg(ub->data));
287 ret = UBUS_STATUS_INVALID_COMMAND;
294 *retmsg_data = htonl(ret);
295 ubus_msg_send(cl, retmsg, false);
298 static void __init ubusd_proto_init(void)
300 blob_buf_init(&b, 0);
301 blob_put_int32(&b, UBUS_ATTR_STATUS, 0);
303 retmsg = ubus_msg_from_blob(false);
307 retmsg->hdr.type = UBUS_MSG_STATUS;
308 retmsg_data = blob_data(blob_data(retmsg->data));