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 bool registered
= ctx
->sock
.registered
;
144 int status
= UBUS_STATUS_NO_DATA
;
145 int64_t timeout
= 0, time_end
= 0;
152 time_end
= get_time_msec() + req_timeout
;
154 ubus_complete_request_async(ctx
, req
);
155 req
->complete_cb
= ubus_sync_req_cb
;
158 while (!req
->status_msg
) {
159 bool cancelled
= uloop_cancelled
;
161 uloop_cancelled
= false;
163 timeout
= time_end
- get_time_msec();
165 ubus_set_req_status(req
, UBUS_STATUS_TIMEOUT
);
166 uloop_cancelled
= cancelled
;
170 ubus_poll_data(ctx
, (unsigned int) timeout
);
172 uloop_cancelled
= cancelled
;
174 ubus_set_req_status(req
, UBUS_STATUS_CONNECTION_FAILED
);
179 if (ctx
->stack_depth
)
180 uloop_cancelled
= true;
183 status
= req
->status_code
;
185 req
->complete_cb
= complete_cb
;
186 if (req
->complete_cb
)
187 req
->complete_cb(req
, status
);
190 uloop_fd_delete(&ctx
->sock
);
192 if (!ctx
->stack_depth
)
193 ctx
->pending_timer
.cb(&ctx
->pending_timer
);
199 void ubus_complete_deferred_request(struct ubus_context
*ctx
, struct ubus_request_data
*req
, int ret
)
201 blob_buf_init(&b
, 0);
202 blob_put_int32(&b
, UBUS_ATTR_STATUS
, ret
);
203 blob_put_int32(&b
, UBUS_ATTR_OBJID
, req
->object
);
204 ubus_send_msg(ctx
, req
->seq
, b
.head
, UBUS_MSG_STATUS
, req
->peer
, req
->fd
);
207 int ubus_send_reply(struct ubus_context
*ctx
, struct ubus_request_data
*req
,
208 struct blob_attr
*msg
)
212 blob_buf_init(&b
, 0);
213 blob_put_int32(&b
, UBUS_ATTR_OBJID
, req
->object
);
214 blob_put(&b
, UBUS_ATTR_DATA
, blob_data(msg
), blob_len(msg
));
215 ret
= ubus_send_msg(ctx
, req
->seq
, b
.head
, UBUS_MSG_DATA
, req
->peer
, -1);
217 return UBUS_STATUS_NO_DATA
;
222 int ubus_invoke_async_fd(struct ubus_context
*ctx
, uint32_t obj
,
223 const char *method
, struct blob_attr
*msg
,
224 struct ubus_request
*req
, int fd
)
226 blob_buf_init(&b
, 0);
227 blob_put_int32(&b
, UBUS_ATTR_OBJID
, obj
);
228 blob_put_string(&b
, UBUS_ATTR_METHOD
, method
);
230 blob_put(&b
, UBUS_ATTR_DATA
, blob_data(msg
), blob_len(msg
));
232 memset(req
, 0, sizeof(*req
));
234 if (__ubus_start_request(ctx
, req
, b
.head
, UBUS_MSG_INVOKE
, obj
) < 0)
235 return UBUS_STATUS_INVALID_ARGUMENT
;
239 int ubus_invoke_fd(struct ubus_context
*ctx
, uint32_t obj
, const char *method
,
240 struct blob_attr
*msg
, ubus_data_handler_t cb
, void *priv
,
243 struct ubus_request req
;
246 rc
= ubus_invoke_async_fd(ctx
, obj
, method
, msg
, &req
, fd
);
252 return ubus_complete_request(ctx
, &req
, timeout
);
256 ubus_notify_complete_cb(struct ubus_request
*req
, int ret
)
258 struct ubus_notify_request
*nreq
;
260 nreq
= container_of(req
, struct ubus_notify_request
, req
);
261 if (!nreq
->complete_cb
)
264 nreq
->complete_cb(nreq
, 0, 0);
268 __ubus_notify_async(struct ubus_context
*ctx
, struct ubus_object
*obj
,
269 const char *type
, struct blob_attr
*msg
,
270 struct ubus_notify_request
*req
, bool reply
)
272 memset(req
, 0, sizeof(*req
));
274 blob_buf_init(&b
, 0);
275 blob_put_int32(&b
, UBUS_ATTR_OBJID
, obj
->id
);
276 blob_put_string(&b
, UBUS_ATTR_METHOD
, type
);
279 blob_put_int8(&b
, UBUS_ATTR_NO_REPLY
, true);
282 blob_put(&b
, UBUS_ATTR_DATA
, blob_data(msg
), blob_len(msg
));
284 if (ubus_start_request(ctx
, &req
->req
, b
.head
, UBUS_MSG_NOTIFY
, obj
->id
) < 0)
285 return UBUS_STATUS_INVALID_ARGUMENT
;
287 /* wait for status message from ubusd first */
288 req
->req
.notify
= true;
290 req
->id
[0] = obj
->id
;
291 req
->req
.complete_cb
= ubus_notify_complete_cb
;
296 int ubus_notify_async(struct ubus_context
*ctx
, struct ubus_object
*obj
,
297 const char *type
, struct blob_attr
*msg
,
298 struct ubus_notify_request
*req
)
300 return __ubus_notify_async(ctx
, obj
, type
, msg
, req
, true);
303 int ubus_notify(struct ubus_context
*ctx
, struct ubus_object
*obj
,
304 const char *type
, struct blob_attr
*msg
, int timeout
)
306 struct ubus_notify_request req
;
309 ret
= __ubus_notify_async(ctx
, obj
, type
, msg
, &req
, timeout
>= 0);
314 ubus_abort_request(ctx
, &req
.req
);
318 return ubus_complete_request(ctx
, &req
.req
, timeout
);
321 static bool ubus_get_status(struct ubus_msghdr_buf
*buf
, int *ret
)
323 struct blob_attr
**attrbuf
= ubus_parse_msg(buf
->data
);
325 if (!attrbuf
[UBUS_ATTR_STATUS
])
328 *ret
= blob_get_u32(attrbuf
[UBUS_ATTR_STATUS
]);
333 ubus_process_req_status(struct ubus_request
*req
, struct ubus_msghdr_buf
*buf
)
335 int ret
= UBUS_STATUS_INVALID_ARGUMENT
;
337 ubus_get_status(buf
, &ret
);
338 req
->peer
= buf
->hdr
.peer
;
339 ubus_set_req_status(req
, ret
);
345 ubus_process_req_data(struct ubus_request
*req
, struct ubus_msghdr_buf
*buf
)
347 struct ubus_pending_data
*data
;
352 req_data_cb(req
, buf
->hdr
.type
, buf
->data
);
353 __ubus_process_req_data(req
);
354 req
->blocked
= false;
357 ubus_req_complete_cb(req
);
362 len
= blob_raw_len(buf
->data
);
363 data
= calloc(1, sizeof(*data
) + len
);
367 data
->type
= buf
->hdr
.type
;
368 memcpy(data
->data
, buf
->data
, len
);
369 list_add(&data
->list
, &req
->pending
);
373 ubus_find_notify_id(struct ubus_notify_request
*n
, uint32_t objid
)
375 uint32_t pending
= n
->pending
;
378 for (i
= 0; pending
; i
++, pending
>>= 1) {
382 if (n
->id
[i
] == objid
)
389 static struct ubus_request
*
390 ubus_find_request(struct ubus_context
*ctx
, uint32_t seq
, uint32_t peer
, int *id
)
392 struct ubus_request
*req
;
394 list_for_each_entry(req
, &ctx
->requests
, list
) {
395 struct ubus_notify_request
*nreq
;
396 nreq
= container_of(req
, struct ubus_notify_request
, req
);
405 *id
= ubus_find_notify_id(nreq
, peer
);
408 } else if (peer
!= req
->peer
)
416 static void ubus_process_notify_status(struct ubus_request
*req
, int id
, struct ubus_msghdr_buf
*buf
)
418 struct ubus_notify_request
*nreq
;
419 struct blob_attr
**tb
;
420 struct blob_attr
*cur
;
424 nreq
= container_of(req
, struct ubus_notify_request
, req
);
425 nreq
->pending
&= ~(1 << id
);
428 /* first id: ubusd's status message with a list of ids */
429 tb
= ubus_parse_msg(buf
->data
);
430 if (tb
[UBUS_ATTR_SUBSCRIBERS
]) {
431 blob_for_each_attr(cur
, tb
[UBUS_ATTR_SUBSCRIBERS
], rem
) {
432 if (!blob_check_type(blob_data(cur
), blob_len(cur
), BLOB_ATTR_INT32
))
435 nreq
->pending
|= (1 << idx
);
436 nreq
->id
[idx
] = blob_get_int32(cur
);
439 if (idx
== UBUS_MAX_NOTIFY_PEERS
+ 1)
444 ubus_get_status(buf
, &ret
);
446 nreq
->status_cb(nreq
, id
, ret
);
450 ubus_set_req_status(req
, 0);
453 void __hidden
ubus_process_req_msg(struct ubus_context
*ctx
, struct ubus_msghdr_buf
*buf
, int fd
)
455 struct ubus_msghdr
*hdr
= &buf
->hdr
;
456 struct ubus_request
*req
;
460 case UBUS_MSG_STATUS
:
461 req
= ubus_find_request(ctx
, hdr
->seq
, hdr
->peer
, &id
);
473 ubus_process_notify_status(req
, id
, buf
);
475 ubus_process_req_status(req
, buf
);
479 req
= ubus_find_request(ctx
, hdr
->seq
, hdr
->peer
, &id
);
480 if (req
&& (req
->data_cb
|| req
->raw_data_cb
))
481 ubus_process_req_data(req
, buf
);
486 int __ubus_monitor(struct ubus_context
*ctx
, const char *type
)
488 blob_buf_init(&b
, 0);
489 return ubus_invoke(ctx
, UBUS_SYSTEM_OBJECT_MONITOR
, type
, b
.head
, NULL
, NULL
, 1000);