2 * Copyright (C) 2011-2012 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.
15 #include "libubus-internal.h"
17 struct ubus_pending_data
{
18 struct list_head list
;
20 struct blob_attr data
[];
23 static void req_data_cb(struct ubus_request
*req
, int type
, struct blob_attr
*data
)
25 struct blob_attr
**attr
;
28 req
->raw_data_cb(req
, type
, data
);
33 attr
= ubus_parse_msg(data
);
34 req
->data_cb(req
, type
, attr
[UBUS_ATTR_DATA
]);
37 static void __ubus_process_req_data(struct ubus_request
*req
)
39 struct ubus_pending_data
*data
;
41 while (!list_empty(&req
->pending
)) {
42 data
= list_first_entry(&req
->pending
,
43 struct ubus_pending_data
, list
);
44 list_del(&data
->list
);
46 req_data_cb(req
, data
->type
, data
->data
);
51 int __hidden
ubus_start_request(struct ubus_context
*ctx
, struct ubus_request
*req
,
52 struct blob_attr
*msg
, int cmd
, uint32_t peer
)
54 memset(req
, 0, sizeof(*req
));
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
;
64 return ubus_send_msg(ctx
, req
->seq
, msg
, cmd
, peer
);
67 void ubus_abort_request(struct ubus_context
*ctx
, struct ubus_request
*req
)
69 if (list_empty(&req
->list
))
72 req
->cancelled
= true;
73 __ubus_process_req_data(req
);
74 list_del_init(&req
->list
);
77 void ubus_complete_request_async(struct ubus_context
*ctx
, struct ubus_request
*req
)
79 if (!list_empty(&req
->list
))
82 list_add(&req
->list
, &ctx
->requests
);
86 ubus_req_complete_cb(struct ubus_request
*req
)
88 ubus_complete_handler_t cb
= req
->complete_cb
;
93 req
->complete_cb
= NULL
;
94 cb(req
, req
->status_code
);
98 ubus_set_req_status(struct ubus_request
*req
, int ret
)
100 if (!list_empty(&req
->list
))
101 list_del_init(&req
->list
);
103 req
->status_msg
= true;
104 req
->status_code
= ret
;
106 ubus_req_complete_cb(req
);
109 static void ubus_sync_req_cb(struct ubus_request
*req
, int ret
)
111 req
->status_msg
= true;
112 req
->status_code
= ret
;
116 struct ubus_sync_req_cb
{
117 struct uloop_timeout timeout
;
118 struct ubus_request
*req
;
121 static void ubus_sync_req_timeout_cb(struct uloop_timeout
*timeout
)
123 struct ubus_sync_req_cb
*cb
;
125 cb
= container_of(timeout
, struct ubus_sync_req_cb
, timeout
);
126 ubus_set_req_status(cb
->req
, UBUS_STATUS_TIMEOUT
);
129 int ubus_complete_request(struct ubus_context
*ctx
, struct ubus_request
*req
,
132 struct ubus_sync_req_cb cb
;
133 ubus_complete_handler_t complete_cb
= req
->complete_cb
;
134 bool registered
= ctx
->sock
.registered
;
135 int status
= UBUS_STATUS_NO_DATA
;
143 memset(&cb
, 0, sizeof(cb
));
145 cb
.timeout
.cb
= ubus_sync_req_timeout_cb
;
146 uloop_timeout_set(&cb
.timeout
, 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
;
155 uloop_cancelled
= false;
157 uloop_cancelled
= cancelled
;
160 if (ctx
->stack_depth
)
161 uloop_cancelled
= true;
164 uloop_timeout_cancel(&cb
.timeout
);
167 status
= req
->status_code
;
169 req
->complete_cb
= complete_cb
;
170 if (req
->complete_cb
)
171 req
->complete_cb(req
, status
);
174 uloop_fd_delete(&ctx
->sock
);
176 if (!ctx
->stack_depth
)
177 ubus_process_pending_msg(ctx
);
182 void ubus_complete_deferred_request(struct ubus_context
*ctx
, struct ubus_request_data
*req
, int ret
)
184 blob_buf_init(&b
, 0);
185 blob_put_int32(&b
, UBUS_ATTR_STATUS
, ret
);
186 blob_put_int32(&b
, UBUS_ATTR_OBJID
, req
->object
);
187 ubus_send_msg(ctx
, req
->seq
, b
.head
, UBUS_MSG_STATUS
, req
->peer
);
190 int ubus_send_reply(struct ubus_context
*ctx
, struct ubus_request_data
*req
,
191 struct blob_attr
*msg
)
195 blob_buf_init(&b
, 0);
196 blob_put_int32(&b
, UBUS_ATTR_OBJID
, req
->object
);
197 blob_put(&b
, UBUS_ATTR_DATA
, blob_data(msg
), blob_len(msg
));
198 ret
= ubus_send_msg(ctx
, req
->seq
, b
.head
, UBUS_MSG_DATA
, req
->peer
);
200 return UBUS_STATUS_NO_DATA
;
205 int ubus_invoke_async(struct ubus_context
*ctx
, uint32_t obj
, const char *method
,
206 struct blob_attr
*msg
, struct ubus_request
*req
)
208 blob_buf_init(&b
, 0);
209 blob_put_int32(&b
, UBUS_ATTR_OBJID
, obj
);
210 blob_put_string(&b
, UBUS_ATTR_METHOD
, method
);
212 blob_put(&b
, UBUS_ATTR_DATA
, blob_data(msg
), blob_len(msg
));
214 if (ubus_start_request(ctx
, req
, b
.head
, UBUS_MSG_INVOKE
, obj
) < 0)
215 return UBUS_STATUS_INVALID_ARGUMENT
;
220 int ubus_invoke(struct ubus_context
*ctx
, uint32_t obj
, const char *method
,
221 struct blob_attr
*msg
, ubus_data_handler_t cb
, void *priv
,
224 struct ubus_request req
;
226 ubus_invoke_async(ctx
, obj
, method
, msg
, &req
);
229 return ubus_complete_request(ctx
, &req
, timeout
);
233 ubus_notify_complete_cb(struct ubus_request
*req
, int ret
)
235 struct ubus_notify_request
*nreq
;
237 nreq
= container_of(req
, struct ubus_notify_request
, req
);
238 if (!nreq
->complete_cb
)
241 nreq
->complete_cb(nreq
, 0, 0);
245 __ubus_notify_async(struct ubus_context
*ctx
, struct ubus_object
*obj
,
246 const char *type
, struct blob_attr
*msg
,
247 struct ubus_notify_request
*req
, bool reply
)
249 memset(req
, 0, sizeof(*req
));
251 blob_buf_init(&b
, 0);
252 blob_put_int32(&b
, UBUS_ATTR_OBJID
, obj
->id
);
253 blob_put_string(&b
, UBUS_ATTR_METHOD
, type
);
256 blob_put_int8(&b
, UBUS_ATTR_NO_REPLY
, true);
259 blob_put(&b
, UBUS_ATTR_DATA
, blob_data(msg
), blob_len(msg
));
261 if (ubus_start_request(ctx
, &req
->req
, b
.head
, UBUS_MSG_NOTIFY
, obj
->id
) < 0)
262 return UBUS_STATUS_INVALID_ARGUMENT
;
264 /* wait for status message from ubusd first */
265 req
->req
.notify
= true;
267 req
->id
[0] = obj
->id
;
268 req
->req
.complete_cb
= ubus_notify_complete_cb
;
273 int ubus_notify_async(struct ubus_context
*ctx
, struct ubus_object
*obj
,
274 const char *type
, struct blob_attr
*msg
,
275 struct ubus_notify_request
*req
)
277 return __ubus_notify_async(ctx
, obj
, type
, msg
, req
, true);
280 int ubus_notify(struct ubus_context
*ctx
, struct ubus_object
*obj
,
281 const char *type
, struct blob_attr
*msg
, int timeout
)
283 struct ubus_notify_request req
;
286 ret
= __ubus_notify_async(ctx
, obj
, type
, msg
, &req
, timeout
>= 0);
291 ubus_abort_request(ctx
, &req
.req
);
295 return ubus_complete_request(ctx
, &req
.req
, timeout
);
298 static bool ubus_get_status(struct ubus_msghdr
*hdr
, int *ret
)
300 struct blob_attr
**attrbuf
= ubus_parse_msg(hdr
->data
);
302 if (!attrbuf
[UBUS_ATTR_STATUS
])
305 *ret
= blob_get_u32(attrbuf
[UBUS_ATTR_STATUS
]);
310 ubus_process_req_status(struct ubus_request
*req
, struct ubus_msghdr
*hdr
)
312 int ret
= UBUS_STATUS_INVALID_ARGUMENT
;
314 ubus_get_status(hdr
, &ret
);
315 req
->peer
= hdr
->peer
;
316 ubus_set_req_status(req
, ret
);
322 ubus_process_req_data(struct ubus_request
*req
, struct ubus_msghdr
*hdr
)
324 struct ubus_pending_data
*data
;
329 req_data_cb(req
, hdr
->type
, hdr
->data
);
330 __ubus_process_req_data(req
);
331 req
->blocked
= false;
334 ubus_req_complete_cb(req
);
339 len
= blob_raw_len(hdr
->data
);
340 data
= calloc(1, sizeof(*data
) + len
);
344 data
->type
= hdr
->type
;
345 memcpy(data
->data
, hdr
->data
, len
);
346 list_add(&data
->list
, &req
->pending
);
350 ubus_find_notify_id(struct ubus_notify_request
*n
, uint32_t objid
)
352 uint32_t pending
= n
->pending
;
355 for (i
= 0; pending
; i
++, pending
>>= 1) {
359 if (n
->id
[i
] == objid
)
366 static struct ubus_request
*
367 ubus_find_request(struct ubus_context
*ctx
, uint32_t seq
, uint32_t peer
, int *id
)
369 struct ubus_request
*req
;
371 list_for_each_entry(req
, &ctx
->requests
, list
) {
372 struct ubus_notify_request
*nreq
;
373 nreq
= container_of(req
, struct ubus_notify_request
, req
);
382 *id
= ubus_find_notify_id(nreq
, peer
);
385 } else if (peer
!= req
->peer
)
393 static void ubus_process_notify_status(struct ubus_request
*req
, int id
, struct ubus_msghdr
*hdr
)
395 struct ubus_notify_request
*nreq
;
396 struct blob_attr
**tb
;
397 struct blob_attr
*cur
;
401 nreq
= container_of(req
, struct ubus_notify_request
, req
);
402 nreq
->pending
&= ~(1 << id
);
405 /* first id: ubusd's status message with a list of ids */
406 tb
= ubus_parse_msg(hdr
->data
);
407 if (tb
[UBUS_ATTR_SUBSCRIBERS
]) {
408 blob_for_each_attr(cur
, tb
[UBUS_ATTR_SUBSCRIBERS
], rem
) {
409 if (!blob_check_type(blob_data(cur
), blob_len(cur
), BLOB_ATTR_INT32
))
412 nreq
->pending
|= (1 << idx
);
413 nreq
->id
[idx
] = blob_get_int32(cur
);
416 if (idx
== UBUS_MAX_NOTIFY_PEERS
+ 1)
421 ubus_get_status(hdr
, &ret
);
423 nreq
->status_cb(nreq
, id
, ret
);
427 ubus_set_req_status(req
, 0);
430 void __hidden
ubus_process_req_msg(struct ubus_context
*ctx
, struct ubus_msghdr
*hdr
)
432 struct ubus_request
*req
;
436 case UBUS_MSG_STATUS
:
437 req
= ubus_find_request(ctx
, hdr
->seq
, hdr
->peer
, &id
);
442 ubus_process_notify_status(req
, id
, hdr
);
444 ubus_process_req_status(req
, hdr
);
448 req
= ubus_find_request(ctx
, hdr
->seq
, hdr
->peer
, &id
);
449 if (req
&& (req
->data_cb
|| req
->raw_data_cb
))
450 ubus_process_req_data(req
, hdr
);