2 * Copyright (C) 2011-2014 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.
14 #include <arpa/inet.h>
20 static struct ubus_msg_buf
*retmsg
;
21 static int *retmsg_data
;
22 static struct avl_tree clients
;
24 static struct blob_attr
*attrbuf
[UBUS_ATTR_MAX
];
26 typedef int (*ubus_cmd_cb
)(struct ubus_client
*cl
, struct ubus_msg_buf
*ub
, struct blob_attr
**attr
);
28 static const struct blob_attr_info ubus_policy
[UBUS_ATTR_MAX
] = {
29 [UBUS_ATTR_SIGNATURE
] = { .type
= BLOB_ATTR_NESTED
},
30 [UBUS_ATTR_OBJTYPE
] = { .type
= BLOB_ATTR_INT32
},
31 [UBUS_ATTR_OBJPATH
] = { .type
= BLOB_ATTR_STRING
},
32 [UBUS_ATTR_OBJID
] = { .type
= BLOB_ATTR_INT32
},
33 [UBUS_ATTR_STATUS
] = { .type
= BLOB_ATTR_INT32
},
34 [UBUS_ATTR_METHOD
] = { .type
= BLOB_ATTR_STRING
},
35 [UBUS_ATTR_USER
] = { .type
= BLOB_ATTR_STRING
},
36 [UBUS_ATTR_GROUP
] = { .type
= BLOB_ATTR_STRING
},
39 struct blob_attr
**ubus_parse_msg(struct blob_attr
*msg
)
41 blob_parse(msg
, attrbuf
, ubus_policy
, UBUS_ATTR_MAX
);
45 static void ubus_msg_close_fd(struct ubus_msg_buf
*ub
)
54 static void ubus_msg_init(struct ubus_msg_buf
*ub
, uint8_t type
, uint16_t seq
, uint32_t peer
)
62 static struct ubus_msg_buf
*ubus_msg_from_blob(bool shared
)
64 return ubus_msg_new(b
.head
, blob_raw_len(b
.head
), shared
);
67 static struct ubus_msg_buf
*ubus_reply_from_blob(struct ubus_msg_buf
*ub
, bool shared
)
69 struct ubus_msg_buf
*new;
71 new = ubus_msg_from_blob(shared
);
75 ubus_msg_init(new, UBUS_MSG_DATA
, ub
->hdr
.seq
, ub
->hdr
.peer
);
80 ubus_proto_send_msg_from_blob(struct ubus_client
*cl
, struct ubus_msg_buf
*ub
,
83 ub
= ubus_reply_from_blob(ub
, true);
88 ubus_msg_send(cl
, ub
, true);
91 static bool ubusd_send_hello(struct ubus_client
*cl
)
93 struct ubus_msg_buf
*ub
;
96 ub
= ubus_msg_from_blob(true);
100 ubus_msg_init(ub
, UBUS_MSG_HELLO
, 0, cl
->id
.id
);
101 ubus_msg_send(cl
, ub
, true);
105 static int ubusd_send_pong(struct ubus_client
*cl
, struct ubus_msg_buf
*ub
, struct blob_attr
**attr
)
107 ub
->hdr
.type
= UBUS_MSG_DATA
;
108 ubus_msg_send(cl
, ub
, false);
112 static int ubusd_handle_remove_object(struct ubus_client
*cl
, struct ubus_msg_buf
*ub
, struct blob_attr
**attr
)
114 struct ubus_object
*obj
;
116 if (!attr
[UBUS_ATTR_OBJID
])
117 return UBUS_STATUS_INVALID_ARGUMENT
;
119 obj
= ubusd_find_object(blob_get_u32(attr
[UBUS_ATTR_OBJID
]));
121 return UBUS_STATUS_NOT_FOUND
;
123 if (obj
->client
!= cl
)
124 return UBUS_STATUS_PERMISSION_DENIED
;
126 blob_buf_init(&b
, 0);
127 blob_put_int32(&b
, UBUS_ATTR_OBJID
, obj
->id
.id
);
129 /* check if we're removing the object type as well */
130 if (obj
->type
&& obj
->type
->refcount
== 1)
131 blob_put_int32(&b
, UBUS_ATTR_OBJTYPE
, obj
->type
->id
.id
);
133 ubus_proto_send_msg_from_blob(cl
, ub
, UBUS_MSG_DATA
);
134 ubusd_free_object(obj
);
139 static int ubusd_handle_add_object(struct ubus_client
*cl
, struct ubus_msg_buf
*ub
, struct blob_attr
**attr
)
141 struct ubus_object
*obj
;
143 obj
= ubusd_create_object(cl
, attr
);
145 return UBUS_STATUS_INVALID_ARGUMENT
;
147 blob_buf_init(&b
, 0);
148 blob_put_int32(&b
, UBUS_ATTR_OBJID
, obj
->id
.id
);
149 if (attr
[UBUS_ATTR_SIGNATURE
] && obj
->type
)
150 blob_put_int32(&b
, UBUS_ATTR_OBJTYPE
, obj
->type
->id
.id
);
152 ubus_proto_send_msg_from_blob(cl
, ub
, UBUS_MSG_DATA
);
156 static void ubusd_send_obj(struct ubus_client
*cl
, struct ubus_msg_buf
*ub
, struct ubus_object
*obj
)
158 struct ubus_method
*m
;
159 int all_cnt
= 0, cnt
= 0;
165 blob_buf_init(&b
, 0);
167 blob_put_string(&b
, UBUS_ATTR_OBJPATH
, obj
->path
.key
);
168 blob_put_int32(&b
, UBUS_ATTR_OBJID
, obj
->id
.id
);
169 blob_put_int32(&b
, UBUS_ATTR_OBJTYPE
, obj
->type
->id
.id
);
171 s
= blob_nest_start(&b
, UBUS_ATTR_SIGNATURE
);
172 list_for_each_entry(m
, &obj
->type
->methods
, list
) {
174 if (!ubusd_acl_check(cl
, obj
->path
.key
, blobmsg_name(m
->data
), UBUS_ACL_ACCESS
)) {
175 blobmsg_add_blob(&b
, m
->data
);
179 blob_nest_end(&b
, s
);
182 ubus_proto_send_msg_from_blob(cl
, ub
, UBUS_MSG_DATA
);
185 static int ubusd_handle_lookup(struct ubus_client
*cl
, struct ubus_msg_buf
*ub
, struct blob_attr
**attr
)
187 struct ubus_object
*obj
;
192 if (!attr
[UBUS_ATTR_OBJPATH
]) {
193 avl_for_each_element(&path
, obj
, path
)
194 ubusd_send_obj(cl
, ub
, obj
);
198 objpath
= blob_data(attr
[UBUS_ATTR_OBJPATH
]);
199 len
= strlen(objpath
);
200 if (objpath
[len
- 1] != '*') {
201 obj
= avl_find_element(&path
, objpath
, obj
, path
);
203 return UBUS_STATUS_NOT_FOUND
;
205 ubusd_send_obj(cl
, ub
, obj
);
211 obj
= avl_find_ge_element(&path
, objpath
, obj
, path
);
213 return UBUS_STATUS_NOT_FOUND
;
215 while (!strncmp(objpath
, obj
->path
.key
, len
)) {
217 ubusd_send_obj(cl
, ub
, obj
);
218 if (obj
== avl_last_element(&path
, obj
, path
))
220 obj
= avl_next_element(obj
, path
);
224 return UBUS_STATUS_NOT_FOUND
;
230 ubusd_forward_invoke(struct ubus_client
*cl
, struct ubus_object
*obj
,
231 const char *method
, struct ubus_msg_buf
*ub
,
232 struct blob_attr
*data
)
234 blob_put_int32(&b
, UBUS_ATTR_OBJID
, obj
->id
.id
);
235 blob_put_string(&b
, UBUS_ATTR_METHOD
, method
);
237 blob_put_string(&b
, UBUS_ATTR_USER
, cl
->user
);
239 blob_put_string(&b
, UBUS_ATTR_GROUP
, cl
->group
);
241 blob_put(&b
, UBUS_ATTR_DATA
, blob_data(data
), blob_len(data
));
243 ubus_proto_send_msg_from_blob(obj
->client
, ub
, UBUS_MSG_INVOKE
);
246 static int ubusd_handle_invoke(struct ubus_client
*cl
, struct ubus_msg_buf
*ub
, struct blob_attr
**attr
)
248 struct ubus_object
*obj
= NULL
;
252 if (!attr
[UBUS_ATTR_METHOD
] || !attr
[UBUS_ATTR_OBJID
])
253 return UBUS_STATUS_INVALID_ARGUMENT
;
255 id
= ubus_find_id(&objects
, blob_get_u32(attr
[UBUS_ATTR_OBJID
]));
257 return UBUS_STATUS_NOT_FOUND
;
259 obj
= container_of(id
, struct ubus_object
, id
);
261 method
= blob_data(attr
[UBUS_ATTR_METHOD
]);
263 if (ubusd_acl_check(cl
, obj
->path
.key
, method
, UBUS_ACL_ACCESS
))
264 return UBUS_STATUS_PERMISSION_DENIED
;
267 return obj
->recv_msg(cl
, ub
, method
, attr
[UBUS_ATTR_DATA
]);
269 ub
->hdr
.peer
= cl
->id
.id
;
270 blob_buf_init(&b
, 0);
272 ubusd_forward_invoke(cl
, obj
, method
, ub
, attr
[UBUS_ATTR_DATA
]);
278 static int ubusd_handle_notify(struct ubus_client
*cl
, struct ubus_msg_buf
*ub
, struct blob_attr
**attr
)
280 struct ubus_object
*obj
= NULL
;
281 struct ubus_subscription
*s
;
284 bool no_reply
= false;
287 if (!attr
[UBUS_ATTR_METHOD
] || !attr
[UBUS_ATTR_OBJID
])
288 return UBUS_STATUS_INVALID_ARGUMENT
;
290 if (attr
[UBUS_ATTR_NO_REPLY
])
291 no_reply
= blob_get_int8(attr
[UBUS_ATTR_NO_REPLY
]);
293 id
= ubus_find_id(&objects
, blob_get_u32(attr
[UBUS_ATTR_OBJID
]));
295 return UBUS_STATUS_NOT_FOUND
;
297 obj
= container_of(id
, struct ubus_object
, id
);
298 if (obj
->client
!= cl
)
299 return UBUS_STATUS_PERMISSION_DENIED
;
302 blob_buf_init(&b
, 0);
303 blob_put_int32(&b
, UBUS_ATTR_OBJID
, id
->id
);
304 c
= blob_nest_start(&b
, UBUS_ATTR_SUBSCRIBERS
);
305 list_for_each_entry(s
, &obj
->subscribers
, list
) {
306 blob_put_int32(&b
, 0, s
->subscriber
->id
.id
);
308 blob_nest_end(&b
, c
);
309 blob_put_int32(&b
, UBUS_ATTR_STATUS
, 0);
310 ubus_proto_send_msg_from_blob(cl
, ub
, UBUS_MSG_STATUS
);
313 ub
->hdr
.peer
= cl
->id
.id
;
314 method
= blob_data(attr
[UBUS_ATTR_METHOD
]);
315 list_for_each_entry(s
, &obj
->subscribers
, list
) {
316 blob_buf_init(&b
, 0);
318 blob_put_int8(&b
, UBUS_ATTR_NO_REPLY
, 1);
319 ubusd_forward_invoke(cl
, s
->subscriber
, method
, ub
, attr
[UBUS_ATTR_DATA
]);
326 static struct ubus_client
*ubusd_get_client_by_id(uint32_t id
)
328 struct ubus_id
*clid
;
330 clid
= ubus_find_id(&clients
, id
);
334 return container_of(clid
, struct ubus_client
, id
);
337 static int ubusd_handle_response(struct ubus_client
*cl
, struct ubus_msg_buf
*ub
, struct blob_attr
**attr
)
339 struct ubus_object
*obj
;
341 if (!attr
[UBUS_ATTR_OBJID
] ||
342 (ub
->hdr
.type
== UBUS_MSG_STATUS
&& !attr
[UBUS_ATTR_STATUS
]) ||
343 (ub
->hdr
.type
== UBUS_MSG_DATA
&& !attr
[UBUS_ATTR_DATA
]))
346 obj
= ubusd_find_object(blob_get_u32(attr
[UBUS_ATTR_OBJID
]));
350 if (cl
!= obj
->client
)
353 cl
= ubusd_get_client_by_id(ub
->hdr
.peer
);
357 ub
->hdr
.peer
= blob_get_u32(attr
[UBUS_ATTR_OBJID
]);
358 ubus_msg_send(cl
, ub
, true);
366 static int ubusd_handle_add_watch(struct ubus_client
*cl
, struct ubus_msg_buf
*ub
, struct blob_attr
**attr
)
368 struct ubus_object
*obj
, *target
;
370 if (!attr
[UBUS_ATTR_OBJID
] || !attr
[UBUS_ATTR_TARGET
])
371 return UBUS_STATUS_INVALID_ARGUMENT
;
373 obj
= ubusd_find_object(blob_get_u32(attr
[UBUS_ATTR_OBJID
]));
375 return UBUS_STATUS_NOT_FOUND
;
377 if (cl
!= obj
->client
)
378 return UBUS_STATUS_INVALID_ARGUMENT
;
380 target
= ubusd_find_object(blob_get_u32(attr
[UBUS_ATTR_TARGET
]));
381 if (!target
|| !target
->client
)
382 return UBUS_STATUS_NOT_FOUND
;
384 if (cl
== target
->client
)
385 return UBUS_STATUS_INVALID_ARGUMENT
;
387 if (!target
->path
.key
) {
388 if (strcmp(target
->client
->user
, cl
->user
) && strcmp(target
->client
->group
, cl
->group
))
389 return UBUS_STATUS_NOT_FOUND
;
390 } else if (ubusd_acl_check(cl
, target
->path
.key
, NULL
, UBUS_ACL_SUBSCRIBE
)) {
391 return UBUS_STATUS_NOT_FOUND
;
394 ubus_subscribe(obj
, target
);
398 static int ubusd_handle_remove_watch(struct ubus_client
*cl
, struct ubus_msg_buf
*ub
, struct blob_attr
**attr
)
400 struct ubus_object
*obj
;
401 struct ubus_subscription
*s
;
404 if (!attr
[UBUS_ATTR_OBJID
] || !attr
[UBUS_ATTR_TARGET
])
405 return UBUS_STATUS_INVALID_ARGUMENT
;
407 obj
= ubusd_find_object(blob_get_u32(attr
[UBUS_ATTR_OBJID
]));
409 return UBUS_STATUS_NOT_FOUND
;
411 if (cl
!= obj
->client
)
412 return UBUS_STATUS_INVALID_ARGUMENT
;
414 id
= blob_get_u32(attr
[UBUS_ATTR_TARGET
]);
415 list_for_each_entry(s
, &obj
->target_list
, target_list
) {
416 if (s
->target
->id
.id
!= id
)
423 return UBUS_STATUS_NOT_FOUND
;
426 static const ubus_cmd_cb handlers
[__UBUS_MSG_LAST
] = {
427 [UBUS_MSG_PING
] = ubusd_send_pong
,
428 [UBUS_MSG_ADD_OBJECT
] = ubusd_handle_add_object
,
429 [UBUS_MSG_REMOVE_OBJECT
] = ubusd_handle_remove_object
,
430 [UBUS_MSG_LOOKUP
] = ubusd_handle_lookup
,
431 [UBUS_MSG_INVOKE
] = ubusd_handle_invoke
,
432 [UBUS_MSG_STATUS
] = ubusd_handle_response
,
433 [UBUS_MSG_DATA
] = ubusd_handle_response
,
434 [UBUS_MSG_SUBSCRIBE
] = ubusd_handle_add_watch
,
435 [UBUS_MSG_UNSUBSCRIBE
] = ubusd_handle_remove_watch
,
436 [UBUS_MSG_NOTIFY
] = ubusd_handle_notify
,
439 void ubusd_proto_receive_message(struct ubus_client
*cl
, struct ubus_msg_buf
*ub
)
441 ubus_cmd_cb cb
= NULL
;
444 retmsg
->hdr
.seq
= ub
->hdr
.seq
;
445 retmsg
->hdr
.peer
= ub
->hdr
.peer
;
447 if (ub
->hdr
.type
< __UBUS_MSG_LAST
)
448 cb
= handlers
[ub
->hdr
.type
];
450 if (ub
->hdr
.type
!= UBUS_MSG_STATUS
)
451 ubus_msg_close_fd(ub
);
454 ret
= cb(cl
, ub
, ubus_parse_msg(ub
->data
));
456 ret
= UBUS_STATUS_INVALID_COMMAND
;
463 *retmsg_data
= htonl(ret
);
464 ubus_msg_send(cl
, retmsg
, false);
467 struct ubus_client
*ubusd_proto_new_client(int fd
, uloop_fd_handler cb
)
469 struct ubus_client
*cl
;
471 cl
= calloc(1, sizeof(*cl
));
475 if (ubusd_acl_init_client(cl
, fd
))
478 INIT_LIST_HEAD(&cl
->objects
);
481 cl
->pending_msg_fd
= -1;
483 if (!ubus_alloc_id(&clients
, &cl
->id
, 0))
486 if (!ubusd_send_hello(cl
))
492 ubus_free_id(&clients
, &cl
->id
);
498 void ubusd_proto_free_client(struct ubus_client
*cl
)
500 struct ubus_object
*obj
;
502 while (!list_empty(&cl
->objects
)) {
503 obj
= list_first_entry(&cl
->objects
, struct ubus_object
, list
);
504 ubusd_free_object(obj
);
507 ubusd_acl_free_client(cl
);
508 ubus_free_id(&clients
, &cl
->id
);
511 void ubus_notify_subscription(struct ubus_object
*obj
)
513 bool active
= !list_empty(&obj
->subscribers
);
514 struct ubus_msg_buf
*ub
;
516 blob_buf_init(&b
, 0);
517 blob_put_int32(&b
, UBUS_ATTR_OBJID
, obj
->id
.id
);
518 blob_put_int8(&b
, UBUS_ATTR_ACTIVE
, active
);
520 ub
= ubus_msg_from_blob(false);
524 ubus_msg_init(ub
, UBUS_MSG_NOTIFY
, ++obj
->invoke_seq
, 0);
525 ubus_msg_send(obj
->client
, ub
, true);
528 void ubus_notify_unsubscribe(struct ubus_subscription
*s
)
530 struct ubus_msg_buf
*ub
;
532 blob_buf_init(&b
, 0);
533 blob_put_int32(&b
, UBUS_ATTR_OBJID
, s
->subscriber
->id
.id
);
534 blob_put_int32(&b
, UBUS_ATTR_TARGET
, s
->target
->id
.id
);
536 ub
= ubus_msg_from_blob(false);
538 ubus_msg_init(ub
, UBUS_MSG_UNSUBSCRIBE
, ++s
->subscriber
->invoke_seq
, 0);
539 ubus_msg_send(s
->subscriber
->client
, ub
, true);
545 static void __constructor
ubusd_proto_init(void)
547 ubus_init_id_tree(&clients
);
549 blob_buf_init(&b
, 0);
550 blob_put_int32(&b
, UBUS_ATTR_STATUS
, 0);
552 retmsg
= ubus_msg_from_blob(false);
556 retmsg
->hdr
.type
= UBUS_MSG_STATUS
;
557 retmsg_data
= blob_data(blob_data(retmsg
->data
));