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 if (!attr
[UBUS_ATTR_DATA
])
38 req
->data_cb(req
, type
, attr
[UBUS_ATTR_DATA
]);
41 static void __ubus_process_req_data(struct ubus_request
*req
)
43 struct ubus_pending_data
*data
;
45 while (!list_empty(&req
->pending
)) {
46 data
= list_first_entry(&req
->pending
,
47 struct ubus_pending_data
, list
);
48 list_del(&data
->list
);
50 req_data_cb(req
, data
->type
, data
->data
);
55 int __hidden
__ubus_start_request(struct ubus_context
*ctx
, struct ubus_request
*req
,
56 struct blob_attr
*msg
, int cmd
, uint32_t peer
)
59 if (msg
&& blob_pad_len(msg
) > UBUS_MAX_MSGLEN
)
62 INIT_LIST_HEAD(&req
->list
);
63 INIT_LIST_HEAD(&req
->pending
);
66 req
->seq
= ++ctx
->request_seq
;
68 return ubus_send_msg(ctx
, req
->seq
, msg
, cmd
, peer
, req
->fd
);
71 int __hidden
ubus_start_request(struct ubus_context
*ctx
, struct ubus_request
*req
,
72 struct blob_attr
*msg
, int cmd
, uint32_t peer
)
74 memset(req
, 0, sizeof(*req
));
78 return __ubus_start_request(ctx
, req
, msg
, cmd
, peer
);
82 void ubus_abort_request(struct ubus_context
*ctx
, struct ubus_request
*req
)
84 if (list_empty(&req
->list
))
87 req
->cancelled
= true;
88 __ubus_process_req_data(req
);
89 list_del_init(&req
->list
);
92 void ubus_complete_request_async(struct ubus_context
*ctx
, struct ubus_request
*req
)
94 if (!list_empty(&req
->list
))
97 list_add(&req
->list
, &ctx
->requests
);
101 ubus_req_complete_cb(struct ubus_request
*req
)
103 ubus_complete_handler_t cb
= req
->complete_cb
;
108 req
->complete_cb
= NULL
;
109 cb(req
, req
->status_code
);
113 ubus_set_req_status(struct ubus_request
*req
, int ret
)
115 if (!list_empty(&req
->list
))
116 list_del_init(&req
->list
);
118 req
->status_msg
= true;
119 req
->status_code
= ret
;
121 ubus_req_complete_cb(req
);
124 static void ubus_sync_req_cb(struct ubus_request
*req
, int ret
)
126 req
->status_msg
= true;
127 req
->status_code
= ret
;
128 req
->ctx
->cancel_poll
= true;
131 static int64_t get_time_msec(void)
136 clock_gettime(CLOCK_MONOTONIC
, &ts
);
137 val
= (int64_t) ts
.tv_sec
* 1000LL;
138 val
+= ts
.tv_nsec
/ 1000000LL;
142 int ubus_complete_request(struct ubus_context
*ctx
, struct ubus_request
*req
,
145 ubus_complete_handler_t complete_cb
= req
->complete_cb
;
146 int status
= UBUS_STATUS_NO_DATA
;
147 int64_t timeout
= 0, time_end
= 0;
150 time_end
= get_time_msec() + req_timeout
;
152 ubus_complete_request_async(ctx
, req
);
153 req
->complete_cb
= ubus_sync_req_cb
;
156 while (!req
->status_msg
) {
158 timeout
= time_end
- get_time_msec();
160 ubus_set_req_status(req
, UBUS_STATUS_TIMEOUT
);
165 ubus_poll_data(ctx
, (unsigned int) timeout
);
168 ubus_set_req_status(req
, UBUS_STATUS_CONNECTION_FAILED
);
169 ctx
->cancel_poll
= true;
175 if (ctx
->stack_depth
)
176 ctx
->cancel_poll
= true;
179 status
= req
->status_code
;
181 req
->complete_cb
= complete_cb
;
182 if (req
->complete_cb
)
183 req
->complete_cb(req
, status
);
185 if (!ctx
->stack_depth
&& !ctx
->sock
.registered
)
186 ctx
->pending_timer
.cb(&ctx
->pending_timer
);
191 void ubus_complete_deferred_request(struct ubus_context
*ctx
, struct ubus_request_data
*req
, int ret
)
193 blob_buf_init(&b
, 0);
194 blob_put_int32(&b
, UBUS_ATTR_STATUS
, ret
);
195 blob_put_int32(&b
, UBUS_ATTR_OBJID
, req
->object
);
196 ubus_send_msg(ctx
, req
->seq
, b
.head
, UBUS_MSG_STATUS
, req
->peer
, req
->fd
);
199 static void ubus_put_data(struct blob_buf
*buf
, struct blob_attr
*msg
)
202 blob_put(buf
, UBUS_ATTR_DATA
, blob_data(msg
), blob_len(msg
));
204 blob_put(buf
, UBUS_ATTR_DATA
, NULL
, 0);
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 ubus_put_data(&b
, 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
);
229 ubus_put_data(&b
, msg
);
231 memset(req
, 0, sizeof(*req
));
233 if (__ubus_start_request(ctx
, req
, b
.head
, UBUS_MSG_INVOKE
, obj
) < 0)
234 return UBUS_STATUS_INVALID_ARGUMENT
;
238 int ubus_invoke_fd(struct ubus_context
*ctx
, uint32_t obj
, const char *method
,
239 struct blob_attr
*msg
, ubus_data_handler_t cb
, void *priv
,
242 struct ubus_request req
;
245 rc
= ubus_invoke_async_fd(ctx
, obj
, method
, msg
, &req
, fd
);
251 return ubus_complete_request(ctx
, &req
, timeout
);
255 ubus_notify_complete_cb(struct ubus_request
*req
, int ret
)
257 struct ubus_notify_request
*nreq
;
259 nreq
= container_of(req
, struct ubus_notify_request
, req
);
260 if (!nreq
->complete_cb
)
263 nreq
->complete_cb(nreq
, 0, 0);
267 ubus_notify_data_cb(struct ubus_request
*req
, int type
, struct blob_attr
*msg
)
269 struct ubus_notify_request
*nreq
;
271 nreq
= container_of(req
, struct ubus_notify_request
, req
);
275 nreq
->data_cb(nreq
, type
, msg
);
279 __ubus_notify_async(struct ubus_context
*ctx
, struct ubus_object
*obj
,
280 const char *type
, struct blob_attr
*msg
,
281 struct ubus_notify_request
*req
, bool reply
)
283 memset(req
, 0, sizeof(*req
));
285 blob_buf_init(&b
, 0);
286 blob_put_int32(&b
, UBUS_ATTR_OBJID
, obj
->id
);
287 blob_put_string(&b
, UBUS_ATTR_METHOD
, type
);
288 ubus_put_data(&b
, msg
);
291 blob_put_int8(&b
, UBUS_ATTR_NO_REPLY
, true);
293 if (ubus_start_request(ctx
, &req
->req
, b
.head
, UBUS_MSG_NOTIFY
, obj
->id
) < 0)
294 return UBUS_STATUS_INVALID_ARGUMENT
;
296 /* wait for status message from ubusd first */
297 req
->req
.notify
= true;
299 req
->id
[0] = obj
->id
;
300 req
->req
.complete_cb
= ubus_notify_complete_cb
;
301 req
->req
.data_cb
= ubus_notify_data_cb
;
306 int ubus_notify_async(struct ubus_context
*ctx
, struct ubus_object
*obj
,
307 const char *type
, struct blob_attr
*msg
,
308 struct ubus_notify_request
*req
)
310 return __ubus_notify_async(ctx
, obj
, type
, msg
, req
, true);
313 int ubus_notify(struct ubus_context
*ctx
, struct ubus_object
*obj
,
314 const char *type
, struct blob_attr
*msg
, int timeout
)
316 struct ubus_notify_request req
;
319 ret
= __ubus_notify_async(ctx
, obj
, type
, msg
, &req
, timeout
>= 0);
324 ubus_abort_request(ctx
, &req
.req
);
328 return ubus_complete_request(ctx
, &req
.req
, timeout
);
331 static bool ubus_get_status(struct ubus_msghdr_buf
*buf
, int *ret
)
333 struct blob_attr
**attrbuf
= ubus_parse_msg(buf
->data
);
335 if (!attrbuf
[UBUS_ATTR_STATUS
])
338 *ret
= blob_get_u32(attrbuf
[UBUS_ATTR_STATUS
]);
343 ubus_process_req_status(struct ubus_request
*req
, struct ubus_msghdr_buf
*buf
)
345 int ret
= UBUS_STATUS_INVALID_ARGUMENT
;
347 ubus_get_status(buf
, &ret
);
348 req
->peer
= buf
->hdr
.peer
;
349 ubus_set_req_status(req
, ret
);
355 ubus_process_req_data(struct ubus_request
*req
, struct ubus_msghdr_buf
*buf
)
357 struct ubus_pending_data
*data
;
362 req_data_cb(req
, buf
->hdr
.type
, buf
->data
);
363 __ubus_process_req_data(req
);
364 req
->blocked
= false;
367 ubus_req_complete_cb(req
);
372 len
= blob_raw_len(buf
->data
);
373 data
= calloc(1, sizeof(*data
) + len
);
377 data
->type
= buf
->hdr
.type
;
378 memcpy(data
->data
, buf
->data
, len
);
379 list_add(&data
->list
, &req
->pending
);
383 ubus_find_notify_id(struct ubus_notify_request
*n
, uint32_t objid
)
385 uint32_t pending
= n
->pending
;
388 for (i
= 0; pending
; i
++, pending
>>= 1) {
392 if (n
->id
[i
] == objid
)
399 static struct ubus_request
*
400 ubus_find_request(struct ubus_context
*ctx
, uint32_t seq
, uint32_t peer
, int *id
)
402 struct ubus_request
*req
;
404 list_for_each_entry(req
, &ctx
->requests
, list
) {
405 struct ubus_notify_request
*nreq
;
406 nreq
= container_of(req
, struct ubus_notify_request
, req
);
415 *id
= ubus_find_notify_id(nreq
, peer
);
418 } else if (peer
!= req
->peer
)
426 static void ubus_process_notify_status(struct ubus_request
*req
, int id
, struct ubus_msghdr_buf
*buf
)
428 struct ubus_notify_request
*nreq
;
429 struct blob_attr
**tb
;
430 struct blob_attr
*cur
;
434 nreq
= container_of(req
, struct ubus_notify_request
, req
);
435 nreq
->pending
&= ~(1 << id
);
438 /* first id: ubusd's status message with a list of ids */
439 tb
= ubus_parse_msg(buf
->data
);
440 if (tb
[UBUS_ATTR_SUBSCRIBERS
]) {
441 blob_for_each_attr(cur
, tb
[UBUS_ATTR_SUBSCRIBERS
], rem
) {
442 if (!blob_check_type(blob_data(cur
), blob_len(cur
), BLOB_ATTR_INT32
))
445 nreq
->pending
|= (1 << idx
);
446 nreq
->id
[idx
] = blob_get_int32(cur
);
449 if (idx
== UBUS_MAX_NOTIFY_PEERS
+ 1)
454 ubus_get_status(buf
, &ret
);
456 nreq
->status_cb(nreq
, id
, ret
);
460 ubus_set_req_status(req
, 0);
463 void __hidden
ubus_process_req_msg(struct ubus_context
*ctx
, struct ubus_msghdr_buf
*buf
, int fd
)
465 struct ubus_msghdr
*hdr
= &buf
->hdr
;
466 struct ubus_request
*req
;
470 case UBUS_MSG_STATUS
:
471 req
= ubus_find_request(ctx
, hdr
->seq
, hdr
->peer
, &id
);
483 ubus_process_notify_status(req
, id
, buf
);
485 ubus_process_req_status(req
, buf
);
489 req
= ubus_find_request(ctx
, hdr
->seq
, hdr
->peer
, &id
);
490 if (req
&& (req
->data_cb
|| req
->raw_data_cb
))
491 ubus_process_req_data(req
, buf
);
496 int __ubus_monitor(struct ubus_context
*ctx
, const char *type
)
498 blob_buf_init(&b
, 0);
499 return ubus_invoke(ctx
, UBUS_SYSTEM_OBJECT_MONITOR
, type
, b
.head
, NULL
, NULL
, 1000);