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;
153 time_end
= get_time_msec() + req_timeout
;
155 ubus_complete_request_async(ctx
, req
);
156 req
->complete_cb
= ubus_sync_req_cb
;
159 while (!req
->status_msg
) {
160 bool cancelled
= uloop_cancelled
;
162 uloop_cancelled
= false;
164 timeout
= time_end
- get_time_msec();
166 ubus_set_req_status(req
, UBUS_STATUS_TIMEOUT
);
167 uloop_cancelled
= cancelled
;
171 ubus_poll_data(ctx
, (unsigned int) timeout
);
173 uloop_cancelled
= cancelled
;
175 ubus_set_req_status(req
, UBUS_STATUS_CONNECTION_FAILED
);
180 if (ctx
->stack_depth
)
181 uloop_cancelled
= true;
184 status
= req
->status_code
;
186 req
->complete_cb
= complete_cb
;
187 if (req
->complete_cb
)
188 req
->complete_cb(req
, status
);
191 uloop_fd_delete(&ctx
->sock
);
193 if (!ctx
->stack_depth
)
194 ctx
->pending_timer
.cb(&ctx
->pending_timer
);
200 void ubus_complete_deferred_request(struct ubus_context
*ctx
, struct ubus_request_data
*req
, int ret
)
202 blob_buf_init(&b
, 0);
203 blob_put_int32(&b
, UBUS_ATTR_STATUS
, ret
);
204 blob_put_int32(&b
, UBUS_ATTR_OBJID
, req
->object
);
205 ubus_send_msg(ctx
, req
->seq
, b
.head
, UBUS_MSG_STATUS
, req
->peer
, req
->fd
);
208 int ubus_send_reply(struct ubus_context
*ctx
, struct ubus_request_data
*req
,
209 struct blob_attr
*msg
)
213 blob_buf_init(&b
, 0);
214 blob_put_int32(&b
, UBUS_ATTR_OBJID
, req
->object
);
215 blob_put(&b
, UBUS_ATTR_DATA
, blob_data(msg
), blob_len(msg
));
216 ret
= ubus_send_msg(ctx
, req
->seq
, b
.head
, UBUS_MSG_DATA
, req
->peer
, -1);
218 return UBUS_STATUS_NO_DATA
;
223 int ubus_invoke_async_fd(struct ubus_context
*ctx
, uint32_t obj
,
224 const char *method
, struct blob_attr
*msg
,
225 struct ubus_request
*req
, int fd
)
227 blob_buf_init(&b
, 0);
228 blob_put_int32(&b
, UBUS_ATTR_OBJID
, obj
);
229 blob_put_string(&b
, UBUS_ATTR_METHOD
, method
);
231 blob_put(&b
, UBUS_ATTR_DATA
, blob_data(msg
), blob_len(msg
));
233 memset(req
, 0, sizeof(*req
));
235 if (__ubus_start_request(ctx
, req
, b
.head
, UBUS_MSG_INVOKE
, obj
) < 0)
236 return UBUS_STATUS_INVALID_ARGUMENT
;
240 int ubus_invoke_fd(struct ubus_context
*ctx
, uint32_t obj
, const char *method
,
241 struct blob_attr
*msg
, ubus_data_handler_t cb
, void *priv
,
244 struct ubus_request req
;
247 rc
= ubus_invoke_async_fd(ctx
, obj
, method
, msg
, &req
, fd
);
253 return ubus_complete_request(ctx
, &req
, timeout
);
257 ubus_notify_complete_cb(struct ubus_request
*req
, int ret
)
259 struct ubus_notify_request
*nreq
;
261 nreq
= container_of(req
, struct ubus_notify_request
, req
);
262 if (!nreq
->complete_cb
)
265 nreq
->complete_cb(nreq
, 0, 0);
269 __ubus_notify_async(struct ubus_context
*ctx
, struct ubus_object
*obj
,
270 const char *type
, struct blob_attr
*msg
,
271 struct ubus_notify_request
*req
, bool reply
)
273 memset(req
, 0, sizeof(*req
));
275 blob_buf_init(&b
, 0);
276 blob_put_int32(&b
, UBUS_ATTR_OBJID
, obj
->id
);
277 blob_put_string(&b
, UBUS_ATTR_METHOD
, type
);
280 blob_put_int8(&b
, UBUS_ATTR_NO_REPLY
, true);
283 blob_put(&b
, UBUS_ATTR_DATA
, blob_data(msg
), blob_len(msg
));
285 if (ubus_start_request(ctx
, &req
->req
, b
.head
, UBUS_MSG_NOTIFY
, obj
->id
) < 0)
286 return UBUS_STATUS_INVALID_ARGUMENT
;
288 /* wait for status message from ubusd first */
289 req
->req
.notify
= true;
291 req
->id
[0] = obj
->id
;
292 req
->req
.complete_cb
= ubus_notify_complete_cb
;
297 int ubus_notify_async(struct ubus_context
*ctx
, struct ubus_object
*obj
,
298 const char *type
, struct blob_attr
*msg
,
299 struct ubus_notify_request
*req
)
301 return __ubus_notify_async(ctx
, obj
, type
, msg
, req
, true);
304 int ubus_notify(struct ubus_context
*ctx
, struct ubus_object
*obj
,
305 const char *type
, struct blob_attr
*msg
, int timeout
)
307 struct ubus_notify_request req
;
310 ret
= __ubus_notify_async(ctx
, obj
, type
, msg
, &req
, timeout
>= 0);
315 ubus_abort_request(ctx
, &req
.req
);
319 return ubus_complete_request(ctx
, &req
.req
, timeout
);
322 static bool ubus_get_status(struct ubus_msghdr_buf
*buf
, int *ret
)
324 struct blob_attr
**attrbuf
= ubus_parse_msg(buf
->data
);
326 if (!attrbuf
[UBUS_ATTR_STATUS
])
329 *ret
= blob_get_u32(attrbuf
[UBUS_ATTR_STATUS
]);
334 ubus_process_req_status(struct ubus_request
*req
, struct ubus_msghdr_buf
*buf
)
336 int ret
= UBUS_STATUS_INVALID_ARGUMENT
;
338 ubus_get_status(buf
, &ret
);
339 req
->peer
= buf
->hdr
.peer
;
340 ubus_set_req_status(req
, ret
);
346 ubus_process_req_data(struct ubus_request
*req
, struct ubus_msghdr_buf
*buf
)
348 struct ubus_pending_data
*data
;
353 req_data_cb(req
, buf
->hdr
.type
, buf
->data
);
354 __ubus_process_req_data(req
);
355 req
->blocked
= false;
358 ubus_req_complete_cb(req
);
363 len
= blob_raw_len(buf
->data
);
364 data
= calloc(1, sizeof(*data
) + len
);
368 data
->type
= buf
->hdr
.type
;
369 memcpy(data
->data
, buf
->data
, len
);
370 list_add(&data
->list
, &req
->pending
);
374 ubus_find_notify_id(struct ubus_notify_request
*n
, uint32_t objid
)
376 uint32_t pending
= n
->pending
;
379 for (i
= 0; pending
; i
++, pending
>>= 1) {
383 if (n
->id
[i
] == objid
)
390 static struct ubus_request
*
391 ubus_find_request(struct ubus_context
*ctx
, uint32_t seq
, uint32_t peer
, int *id
)
393 struct ubus_request
*req
;
395 list_for_each_entry(req
, &ctx
->requests
, list
) {
396 struct ubus_notify_request
*nreq
;
397 nreq
= container_of(req
, struct ubus_notify_request
, req
);
406 *id
= ubus_find_notify_id(nreq
, peer
);
409 } else if (peer
!= req
->peer
)
417 static void ubus_process_notify_status(struct ubus_request
*req
, int id
, struct ubus_msghdr_buf
*buf
)
419 struct ubus_notify_request
*nreq
;
420 struct blob_attr
**tb
;
421 struct blob_attr
*cur
;
425 nreq
= container_of(req
, struct ubus_notify_request
, req
);
426 nreq
->pending
&= ~(1 << id
);
429 /* first id: ubusd's status message with a list of ids */
430 tb
= ubus_parse_msg(buf
->data
);
431 if (tb
[UBUS_ATTR_SUBSCRIBERS
]) {
432 blob_for_each_attr(cur
, tb
[UBUS_ATTR_SUBSCRIBERS
], rem
) {
433 if (!blob_check_type(blob_data(cur
), blob_len(cur
), BLOB_ATTR_INT32
))
436 nreq
->pending
|= (1 << idx
);
437 nreq
->id
[idx
] = blob_get_int32(cur
);
440 if (idx
== UBUS_MAX_NOTIFY_PEERS
+ 1)
445 ubus_get_status(buf
, &ret
);
447 nreq
->status_cb(nreq
, id
, ret
);
451 ubus_set_req_status(req
, 0);
454 void __hidden
ubus_process_req_msg(struct ubus_context
*ctx
, struct ubus_msghdr_buf
*buf
, int fd
)
456 struct ubus_msghdr
*hdr
= &buf
->hdr
;
457 struct ubus_request
*req
;
461 case UBUS_MSG_STATUS
:
462 req
= ubus_find_request(ctx
, hdr
->seq
, hdr
->peer
, &id
);
474 ubus_process_notify_status(req
, id
, buf
);
476 ubus_process_req_status(req
, buf
);
480 req
= ubus_find_request(ctx
, hdr
->seq
, hdr
->peer
, &id
);
481 if (req
&& (req
->data_cb
|| req
->raw_data_cb
))
482 ubus_process_req_data(req
, buf
);
487 int __ubus_monitor(struct ubus_context
*ctx
, const char *type
)
489 blob_buf_init(&b
, 0);
490 return ubus_invoke(ctx
, UBUS_SYSTEM_OBJECT_MONITOR
, type
, b
.head
, NULL
, NULL
, 1000);