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
)
55 memset(req
, 0, sizeof(*req
));
57 if (msg
&& blob_pad_len(msg
) > UBUS_MAX_MSGLEN
)
60 INIT_LIST_HEAD(&req
->list
);
61 INIT_LIST_HEAD(&req
->pending
);
64 req
->seq
= ++ctx
->request_seq
;
65 return ubus_send_msg(ctx
, req
->seq
, msg
, cmd
, peer
, -1);
68 void ubus_abort_request(struct ubus_context
*ctx
, struct ubus_request
*req
)
70 if (list_empty(&req
->list
))
73 req
->cancelled
= true;
74 __ubus_process_req_data(req
);
75 list_del_init(&req
->list
);
78 void ubus_complete_request_async(struct ubus_context
*ctx
, struct ubus_request
*req
)
80 if (!list_empty(&req
->list
))
83 list_add(&req
->list
, &ctx
->requests
);
87 ubus_req_complete_cb(struct ubus_request
*req
)
89 ubus_complete_handler_t cb
= req
->complete_cb
;
94 req
->complete_cb
= NULL
;
95 cb(req
, req
->status_code
);
99 ubus_set_req_status(struct ubus_request
*req
, int ret
)
101 if (!list_empty(&req
->list
))
102 list_del_init(&req
->list
);
104 req
->status_msg
= true;
105 req
->status_code
= ret
;
107 ubus_req_complete_cb(req
);
110 static void ubus_sync_req_cb(struct ubus_request
*req
, int ret
)
112 req
->status_msg
= true;
113 req
->status_code
= ret
;
117 static int64_t get_time_msec(void)
122 clock_gettime(CLOCK_MONOTONIC
, &ts
);
123 val
= (int64_t) ts
.tv_sec
* 1000LL;
124 val
+= ts
.tv_nsec
/ 1000000LL;
128 int ubus_complete_request(struct ubus_context
*ctx
, struct ubus_request
*req
,
131 ubus_complete_handler_t complete_cb
= req
->complete_cb
;
132 bool registered
= ctx
->sock
.registered
;
133 int status
= UBUS_STATUS_NO_DATA
;
134 int64_t timeout
= 0, time_end
= 0;
142 time_end
= get_time_msec() + req_timeout
;
144 ubus_complete_request_async(ctx
, req
);
145 req
->complete_cb
= ubus_sync_req_cb
;
148 while (!req
->status_msg
) {
149 bool cancelled
= uloop_cancelled
;
151 uloop_cancelled
= false;
153 timeout
= time_end
- get_time_msec();
155 ubus_set_req_status(req
, UBUS_STATUS_TIMEOUT
);
156 uloop_cancelled
= cancelled
;
160 ubus_poll_data(ctx
, (unsigned int) timeout
);
162 uloop_cancelled
= cancelled
;
165 if (ctx
->stack_depth
)
166 uloop_cancelled
= true;
169 status
= req
->status_code
;
171 req
->complete_cb
= complete_cb
;
172 if (req
->complete_cb
)
173 req
->complete_cb(req
, status
);
176 uloop_fd_delete(&ctx
->sock
);
178 if (!ctx
->stack_depth
)
179 ctx
->pending_timer
.cb(&ctx
->pending_timer
);
185 void ubus_complete_deferred_request(struct ubus_context
*ctx
, struct ubus_request_data
*req
, int ret
)
187 blob_buf_init(&b
, 0);
188 blob_put_int32(&b
, UBUS_ATTR_STATUS
, ret
);
189 blob_put_int32(&b
, UBUS_ATTR_OBJID
, req
->object
);
190 ubus_send_msg(ctx
, req
->seq
, b
.head
, UBUS_MSG_STATUS
, req
->peer
, req
->fd
);
193 int ubus_send_reply(struct ubus_context
*ctx
, struct ubus_request_data
*req
,
194 struct blob_attr
*msg
)
198 blob_buf_init(&b
, 0);
199 blob_put_int32(&b
, UBUS_ATTR_OBJID
, req
->object
);
200 blob_put(&b
, UBUS_ATTR_DATA
, blob_data(msg
), blob_len(msg
));
201 ret
= ubus_send_msg(ctx
, req
->seq
, b
.head
, UBUS_MSG_DATA
, req
->peer
, -1);
203 return UBUS_STATUS_NO_DATA
;
208 int ubus_invoke_async(struct ubus_context
*ctx
, uint32_t obj
, const char *method
,
209 struct blob_attr
*msg
, struct ubus_request
*req
)
211 blob_buf_init(&b
, 0);
212 blob_put_int32(&b
, UBUS_ATTR_OBJID
, obj
);
213 blob_put_string(&b
, UBUS_ATTR_METHOD
, method
);
215 blob_put(&b
, UBUS_ATTR_DATA
, blob_data(msg
), blob_len(msg
));
217 if (ubus_start_request(ctx
, req
, b
.head
, UBUS_MSG_INVOKE
, obj
) < 0)
218 return UBUS_STATUS_INVALID_ARGUMENT
;
223 int ubus_invoke(struct ubus_context
*ctx
, uint32_t obj
, const char *method
,
224 struct blob_attr
*msg
, ubus_data_handler_t cb
, void *priv
,
227 struct ubus_request req
;
230 rc
= ubus_invoke_async(ctx
, obj
, method
, msg
, &req
);
236 return ubus_complete_request(ctx
, &req
, timeout
);
240 ubus_notify_complete_cb(struct ubus_request
*req
, int ret
)
242 struct ubus_notify_request
*nreq
;
244 nreq
= container_of(req
, struct ubus_notify_request
, req
);
245 if (!nreq
->complete_cb
)
248 nreq
->complete_cb(nreq
, 0, 0);
252 __ubus_notify_async(struct ubus_context
*ctx
, struct ubus_object
*obj
,
253 const char *type
, struct blob_attr
*msg
,
254 struct ubus_notify_request
*req
, bool reply
)
256 memset(req
, 0, sizeof(*req
));
258 blob_buf_init(&b
, 0);
259 blob_put_int32(&b
, UBUS_ATTR_OBJID
, obj
->id
);
260 blob_put_string(&b
, UBUS_ATTR_METHOD
, type
);
263 blob_put_int8(&b
, UBUS_ATTR_NO_REPLY
, true);
266 blob_put(&b
, UBUS_ATTR_DATA
, blob_data(msg
), blob_len(msg
));
268 if (ubus_start_request(ctx
, &req
->req
, b
.head
, UBUS_MSG_NOTIFY
, obj
->id
) < 0)
269 return UBUS_STATUS_INVALID_ARGUMENT
;
271 /* wait for status message from ubusd first */
272 req
->req
.notify
= true;
274 req
->id
[0] = obj
->id
;
275 req
->req
.complete_cb
= ubus_notify_complete_cb
;
280 int ubus_notify_async(struct ubus_context
*ctx
, struct ubus_object
*obj
,
281 const char *type
, struct blob_attr
*msg
,
282 struct ubus_notify_request
*req
)
284 return __ubus_notify_async(ctx
, obj
, type
, msg
, req
, true);
287 int ubus_notify(struct ubus_context
*ctx
, struct ubus_object
*obj
,
288 const char *type
, struct blob_attr
*msg
, int timeout
)
290 struct ubus_notify_request req
;
293 ret
= __ubus_notify_async(ctx
, obj
, type
, msg
, &req
, timeout
>= 0);
298 ubus_abort_request(ctx
, &req
.req
);
302 return ubus_complete_request(ctx
, &req
.req
, timeout
);
305 static bool ubus_get_status(struct ubus_msghdr_buf
*buf
, int *ret
)
307 struct blob_attr
**attrbuf
= ubus_parse_msg(buf
->data
);
309 if (!attrbuf
[UBUS_ATTR_STATUS
])
312 *ret
= blob_get_u32(attrbuf
[UBUS_ATTR_STATUS
]);
317 ubus_process_req_status(struct ubus_request
*req
, struct ubus_msghdr_buf
*buf
)
319 int ret
= UBUS_STATUS_INVALID_ARGUMENT
;
321 ubus_get_status(buf
, &ret
);
322 req
->peer
= buf
->hdr
.peer
;
323 ubus_set_req_status(req
, ret
);
329 ubus_process_req_data(struct ubus_request
*req
, struct ubus_msghdr_buf
*buf
)
331 struct ubus_pending_data
*data
;
336 req_data_cb(req
, buf
->hdr
.type
, buf
->data
);
337 __ubus_process_req_data(req
);
338 req
->blocked
= false;
341 ubus_req_complete_cb(req
);
346 len
= blob_raw_len(buf
->data
);
347 data
= calloc(1, sizeof(*data
) + len
);
351 data
->type
= buf
->hdr
.type
;
352 memcpy(data
->data
, buf
->data
, len
);
353 list_add(&data
->list
, &req
->pending
);
357 ubus_find_notify_id(struct ubus_notify_request
*n
, uint32_t objid
)
359 uint32_t pending
= n
->pending
;
362 for (i
= 0; pending
; i
++, pending
>>= 1) {
366 if (n
->id
[i
] == objid
)
373 static struct ubus_request
*
374 ubus_find_request(struct ubus_context
*ctx
, uint32_t seq
, uint32_t peer
, int *id
)
376 struct ubus_request
*req
;
378 list_for_each_entry(req
, &ctx
->requests
, list
) {
379 struct ubus_notify_request
*nreq
;
380 nreq
= container_of(req
, struct ubus_notify_request
, req
);
389 *id
= ubus_find_notify_id(nreq
, peer
);
392 } else if (peer
!= req
->peer
)
400 static void ubus_process_notify_status(struct ubus_request
*req
, int id
, struct ubus_msghdr_buf
*buf
)
402 struct ubus_notify_request
*nreq
;
403 struct blob_attr
**tb
;
404 struct blob_attr
*cur
;
408 nreq
= container_of(req
, struct ubus_notify_request
, req
);
409 nreq
->pending
&= ~(1 << id
);
412 /* first id: ubusd's status message with a list of ids */
413 tb
= ubus_parse_msg(buf
->data
);
414 if (tb
[UBUS_ATTR_SUBSCRIBERS
]) {
415 blob_for_each_attr(cur
, tb
[UBUS_ATTR_SUBSCRIBERS
], rem
) {
416 if (!blob_check_type(blob_data(cur
), blob_len(cur
), BLOB_ATTR_INT32
))
419 nreq
->pending
|= (1 << idx
);
420 nreq
->id
[idx
] = blob_get_int32(cur
);
423 if (idx
== UBUS_MAX_NOTIFY_PEERS
+ 1)
428 ubus_get_status(buf
, &ret
);
430 nreq
->status_cb(nreq
, id
, ret
);
434 ubus_set_req_status(req
, 0);
437 void __hidden
ubus_process_req_msg(struct ubus_context
*ctx
, struct ubus_msghdr_buf
*buf
, int fd
)
439 struct ubus_msghdr
*hdr
= &buf
->hdr
;
440 struct ubus_request
*req
;
444 case UBUS_MSG_STATUS
:
445 req
= ubus_find_request(ctx
, hdr
->seq
, hdr
->peer
, &id
);
457 ubus_process_notify_status(req
, id
, buf
);
459 ubus_process_req_status(req
, buf
);
463 req
= ubus_find_request(ctx
, hdr
->seq
, hdr
->peer
, &id
);
464 if (req
&& (req
->data_cb
|| req
->raw_data_cb
))
465 ubus_process_req_data(req
, buf
);