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.
16 #include "libubus-internal.h"
18 struct ubus_pending_data
{
19 struct list_head list
;
21 struct blob_attr data
[];
24 static void req_data_cb(struct ubus_request
*req
, int type
, struct blob_attr
*data
)
26 struct blob_attr
**attr
;
29 req
->raw_data_cb(req
, type
, data
);
34 attr
= ubus_parse_msg(data
);
35 req
->data_cb(req
, type
, attr
[UBUS_ATTR_DATA
]);
38 static void __ubus_process_req_data(struct ubus_request
*req
)
40 struct ubus_pending_data
*data
;
42 while (!list_empty(&req
->pending
)) {
43 data
= list_first_entry(&req
->pending
,
44 struct ubus_pending_data
, list
);
45 list_del(&data
->list
);
47 req_data_cb(req
, data
->type
, data
->data
);
52 int __hidden
__ubus_start_request(struct ubus_context
*ctx
, struct ubus_request
*req
,
53 struct blob_attr
*msg
, int cmd
, uint32_t peer
)
56 if (msg
&& blob_pad_len(msg
) > UBUS_MAX_MSGLEN
)
59 INIT_LIST_HEAD(&req
->list
);
60 INIT_LIST_HEAD(&req
->pending
);
63 req
->seq
= ++ctx
->request_seq
;
65 return ubus_send_msg(ctx
, req
->seq
, msg
, cmd
, peer
, req
->fd
);
68 int __hidden
ubus_start_request(struct ubus_context
*ctx
, struct ubus_request
*req
,
69 struct blob_attr
*msg
, int cmd
, uint32_t peer
)
71 memset(req
, 0, sizeof(*req
));
75 return __ubus_start_request(ctx
, req
, msg
, cmd
, peer
);
79 void ubus_abort_request(struct ubus_context
*ctx
, struct ubus_request
*req
)
81 if (list_empty(&req
->list
))
84 req
->cancelled
= true;
85 __ubus_process_req_data(req
);
86 list_del_init(&req
->list
);
89 void ubus_complete_request_async(struct ubus_context
*ctx
, struct ubus_request
*req
)
91 if (!list_empty(&req
->list
))
94 list_add(&req
->list
, &ctx
->requests
);
98 ubus_req_complete_cb(struct ubus_request
*req
)
100 ubus_complete_handler_t cb
= req
->complete_cb
;
105 req
->complete_cb
= NULL
;
106 cb(req
, req
->status_code
);
110 ubus_set_req_status(struct ubus_request
*req
, int ret
)
112 if (!list_empty(&req
->list
))
113 list_del_init(&req
->list
);
115 req
->status_msg
= true;
116 req
->status_code
= ret
;
118 ubus_req_complete_cb(req
);
121 static void ubus_sync_req_cb(struct ubus_request
*req
, int ret
)
123 req
->status_msg
= true;
124 req
->status_code
= ret
;
128 static int64_t get_time_msec(void)
133 clock_gettime(CLOCK_MONOTONIC
, &ts
);
134 val
= (int64_t) ts
.tv_sec
* 1000LL;
135 val
+= ts
.tv_nsec
/ 1000000LL;
139 int ubus_complete_request(struct ubus_context
*ctx
, struct ubus_request
*req
,
142 ubus_complete_handler_t complete_cb
= req
->complete_cb
;
143 int status
= UBUS_STATUS_NO_DATA
;
144 int64_t timeout
= 0, time_end
= 0;
147 time_end
= get_time_msec() + req_timeout
;
149 ubus_complete_request_async(ctx
, req
);
150 req
->complete_cb
= ubus_sync_req_cb
;
153 while (!req
->status_msg
) {
154 bool cancelled
= uloop_cancelled
;
156 uloop_cancelled
= false;
158 timeout
= time_end
- get_time_msec();
160 ubus_set_req_status(req
, UBUS_STATUS_TIMEOUT
);
161 uloop_cancelled
= cancelled
;
165 ubus_poll_data(ctx
, (unsigned int) timeout
);
167 uloop_cancelled
= cancelled
;
169 ubus_set_req_status(req
, UBUS_STATUS_CONNECTION_FAILED
);
174 if (ctx
->stack_depth
)
175 uloop_cancelled
= true;
178 status
= req
->status_code
;
180 req
->complete_cb
= complete_cb
;
181 if (req
->complete_cb
)
182 req
->complete_cb(req
, status
);
184 if (!ctx
->stack_depth
&& !ctx
->sock
.registered
)
185 ctx
->pending_timer
.cb(&ctx
->pending_timer
);
190 void ubus_complete_deferred_request(struct ubus_context
*ctx
, struct ubus_request_data
*req
, int ret
)
192 blob_buf_init(&b
, 0);
193 blob_put_int32(&b
, UBUS_ATTR_STATUS
, ret
);
194 blob_put_int32(&b
, UBUS_ATTR_OBJID
, req
->object
);
195 ubus_send_msg(ctx
, req
->seq
, b
.head
, UBUS_MSG_STATUS
, req
->peer
, req
->fd
);
198 int ubus_send_reply(struct ubus_context
*ctx
, struct ubus_request_data
*req
,
199 struct blob_attr
*msg
)
203 blob_buf_init(&b
, 0);
204 blob_put_int32(&b
, UBUS_ATTR_OBJID
, req
->object
);
205 blob_put(&b
, UBUS_ATTR_DATA
, blob_data(msg
), blob_len(msg
));
206 ret
= ubus_send_msg(ctx
, req
->seq
, b
.head
, UBUS_MSG_DATA
, req
->peer
, -1);
208 return UBUS_STATUS_NO_DATA
;
213 int ubus_invoke_async_fd(struct ubus_context
*ctx
, uint32_t obj
,
214 const char *method
, struct blob_attr
*msg
,
215 struct ubus_request
*req
, int fd
)
217 blob_buf_init(&b
, 0);
218 blob_put_int32(&b
, UBUS_ATTR_OBJID
, obj
);
219 blob_put_string(&b
, UBUS_ATTR_METHOD
, method
);
221 blob_put(&b
, UBUS_ATTR_DATA
, blob_data(msg
), blob_len(msg
));
223 memset(req
, 0, sizeof(*req
));
225 if (__ubus_start_request(ctx
, req
, b
.head
, UBUS_MSG_INVOKE
, obj
) < 0)
226 return UBUS_STATUS_INVALID_ARGUMENT
;
230 int ubus_invoke_fd(struct ubus_context
*ctx
, uint32_t obj
, const char *method
,
231 struct blob_attr
*msg
, ubus_data_handler_t cb
, void *priv
,
234 struct ubus_request req
;
237 rc
= ubus_invoke_async_fd(ctx
, obj
, method
, msg
, &req
, fd
);
243 return ubus_complete_request(ctx
, &req
, timeout
);
247 ubus_notify_complete_cb(struct ubus_request
*req
, int ret
)
249 struct ubus_notify_request
*nreq
;
251 nreq
= container_of(req
, struct ubus_notify_request
, req
);
252 if (!nreq
->complete_cb
)
255 nreq
->complete_cb(nreq
, 0, 0);
259 __ubus_notify_async(struct ubus_context
*ctx
, struct ubus_object
*obj
,
260 const char *type
, struct blob_attr
*msg
,
261 struct ubus_notify_request
*req
, bool reply
)
263 memset(req
, 0, sizeof(*req
));
265 blob_buf_init(&b
, 0);
266 blob_put_int32(&b
, UBUS_ATTR_OBJID
, obj
->id
);
267 blob_put_string(&b
, UBUS_ATTR_METHOD
, type
);
270 blob_put_int8(&b
, UBUS_ATTR_NO_REPLY
, true);
273 blob_put(&b
, UBUS_ATTR_DATA
, blob_data(msg
), blob_len(msg
));
275 if (ubus_start_request(ctx
, &req
->req
, b
.head
, UBUS_MSG_NOTIFY
, obj
->id
) < 0)
276 return UBUS_STATUS_INVALID_ARGUMENT
;
278 /* wait for status message from ubusd first */
279 req
->req
.notify
= true;
281 req
->id
[0] = obj
->id
;
282 req
->req
.complete_cb
= ubus_notify_complete_cb
;
287 int ubus_notify_async(struct ubus_context
*ctx
, struct ubus_object
*obj
,
288 const char *type
, struct blob_attr
*msg
,
289 struct ubus_notify_request
*req
)
291 return __ubus_notify_async(ctx
, obj
, type
, msg
, req
, true);
294 int ubus_notify(struct ubus_context
*ctx
, struct ubus_object
*obj
,
295 const char *type
, struct blob_attr
*msg
, int timeout
)
297 struct ubus_notify_request req
;
300 ret
= __ubus_notify_async(ctx
, obj
, type
, msg
, &req
, timeout
>= 0);
305 ubus_abort_request(ctx
, &req
.req
);
309 return ubus_complete_request(ctx
, &req
.req
, timeout
);
312 static bool ubus_get_status(struct ubus_msghdr_buf
*buf
, int *ret
)
314 struct blob_attr
**attrbuf
= ubus_parse_msg(buf
->data
);
316 if (!attrbuf
[UBUS_ATTR_STATUS
])
319 *ret
= blob_get_u32(attrbuf
[UBUS_ATTR_STATUS
]);
324 ubus_process_req_status(struct ubus_request
*req
, struct ubus_msghdr_buf
*buf
)
326 int ret
= UBUS_STATUS_INVALID_ARGUMENT
;
328 ubus_get_status(buf
, &ret
);
329 req
->peer
= buf
->hdr
.peer
;
330 ubus_set_req_status(req
, ret
);
336 ubus_process_req_data(struct ubus_request
*req
, struct ubus_msghdr_buf
*buf
)
338 struct ubus_pending_data
*data
;
343 req_data_cb(req
, buf
->hdr
.type
, buf
->data
);
344 __ubus_process_req_data(req
);
345 req
->blocked
= false;
348 ubus_req_complete_cb(req
);
353 len
= blob_raw_len(buf
->data
);
354 data
= calloc(1, sizeof(*data
) + len
);
358 data
->type
= buf
->hdr
.type
;
359 memcpy(data
->data
, buf
->data
, len
);
360 list_add(&data
->list
, &req
->pending
);
364 ubus_find_notify_id(struct ubus_notify_request
*n
, uint32_t objid
)
366 uint32_t pending
= n
->pending
;
369 for (i
= 0; pending
; i
++, pending
>>= 1) {
373 if (n
->id
[i
] == objid
)
380 static struct ubus_request
*
381 ubus_find_request(struct ubus_context
*ctx
, uint32_t seq
, uint32_t peer
, int *id
)
383 struct ubus_request
*req
;
385 list_for_each_entry(req
, &ctx
->requests
, list
) {
386 struct ubus_notify_request
*nreq
;
387 nreq
= container_of(req
, struct ubus_notify_request
, req
);
396 *id
= ubus_find_notify_id(nreq
, peer
);
399 } else if (peer
!= req
->peer
)
407 static void ubus_process_notify_status(struct ubus_request
*req
, int id
, struct ubus_msghdr_buf
*buf
)
409 struct ubus_notify_request
*nreq
;
410 struct blob_attr
**tb
;
411 struct blob_attr
*cur
;
415 nreq
= container_of(req
, struct ubus_notify_request
, req
);
416 nreq
->pending
&= ~(1 << id
);
419 /* first id: ubusd's status message with a list of ids */
420 tb
= ubus_parse_msg(buf
->data
);
421 if (tb
[UBUS_ATTR_SUBSCRIBERS
]) {
422 blob_for_each_attr(cur
, tb
[UBUS_ATTR_SUBSCRIBERS
], rem
) {
423 if (!blob_check_type(blob_data(cur
), blob_len(cur
), BLOB_ATTR_INT32
))
426 nreq
->pending
|= (1 << idx
);
427 nreq
->id
[idx
] = blob_get_int32(cur
);
430 if (idx
== UBUS_MAX_NOTIFY_PEERS
+ 1)
435 ubus_get_status(buf
, &ret
);
437 nreq
->status_cb(nreq
, id
, ret
);
441 ubus_set_req_status(req
, 0);
444 void __hidden
ubus_process_req_msg(struct ubus_context
*ctx
, struct ubus_msghdr_buf
*buf
, int fd
)
446 struct ubus_msghdr
*hdr
= &buf
->hdr
;
447 struct ubus_request
*req
;
451 case UBUS_MSG_STATUS
:
452 req
= ubus_find_request(ctx
, hdr
->seq
, hdr
->peer
, &id
);
464 ubus_process_notify_status(req
, id
, buf
);
466 ubus_process_req_status(req
, buf
);
470 req
= ubus_find_request(ctx
, hdr
->seq
, hdr
->peer
, &id
);
471 if (req
&& (req
->data_cb
|| req
->raw_data_cb
))
472 ubus_process_req_data(req
, buf
);
477 int __ubus_monitor(struct ubus_context
*ctx
, const char *type
)
479 blob_buf_init(&b
, 0);
480 return ubus_invoke(ctx
, UBUS_SYSTEM_OBJECT_MONITOR
, type
, b
.head
, NULL
, NULL
, 1000);