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
);
159 ubus_poll_data(ctx
, (unsigned int) timeout
);
161 uloop_cancelled
= cancelled
;
164 if (ctx
->stack_depth
)
165 uloop_cancelled
= true;
168 status
= req
->status_code
;
170 req
->complete_cb
= complete_cb
;
171 if (req
->complete_cb
)
172 req
->complete_cb(req
, status
);
175 uloop_fd_delete(&ctx
->sock
);
180 void ubus_complete_deferred_request(struct ubus_context
*ctx
, struct ubus_request_data
*req
, int ret
)
182 blob_buf_init(&b
, 0);
183 blob_put_int32(&b
, UBUS_ATTR_STATUS
, ret
);
184 blob_put_int32(&b
, UBUS_ATTR_OBJID
, req
->object
);
185 ubus_send_msg(ctx
, req
->seq
, b
.head
, UBUS_MSG_STATUS
, req
->peer
, req
->fd
);
188 int ubus_send_reply(struct ubus_context
*ctx
, struct ubus_request_data
*req
,
189 struct blob_attr
*msg
)
193 blob_buf_init(&b
, 0);
194 blob_put_int32(&b
, UBUS_ATTR_OBJID
, req
->object
);
195 blob_put(&b
, UBUS_ATTR_DATA
, blob_data(msg
), blob_len(msg
));
196 ret
= ubus_send_msg(ctx
, req
->seq
, b
.head
, UBUS_MSG_DATA
, req
->peer
, -1);
198 return UBUS_STATUS_NO_DATA
;
203 int ubus_invoke_async(struct ubus_context
*ctx
, uint32_t obj
, const char *method
,
204 struct blob_attr
*msg
, struct ubus_request
*req
)
206 blob_buf_init(&b
, 0);
207 blob_put_int32(&b
, UBUS_ATTR_OBJID
, obj
);
208 blob_put_string(&b
, UBUS_ATTR_METHOD
, method
);
210 blob_put(&b
, UBUS_ATTR_DATA
, blob_data(msg
), blob_len(msg
));
212 if (ubus_start_request(ctx
, req
, b
.head
, UBUS_MSG_INVOKE
, obj
) < 0)
213 return UBUS_STATUS_INVALID_ARGUMENT
;
218 int ubus_invoke(struct ubus_context
*ctx
, uint32_t obj
, const char *method
,
219 struct blob_attr
*msg
, ubus_data_handler_t cb
, void *priv
,
222 struct ubus_request req
;
224 ubus_invoke_async(ctx
, obj
, method
, msg
, &req
);
227 return ubus_complete_request(ctx
, &req
, timeout
);
231 ubus_notify_complete_cb(struct ubus_request
*req
, int ret
)
233 struct ubus_notify_request
*nreq
;
235 nreq
= container_of(req
, struct ubus_notify_request
, req
);
236 if (!nreq
->complete_cb
)
239 nreq
->complete_cb(nreq
, 0, 0);
243 __ubus_notify_async(struct ubus_context
*ctx
, struct ubus_object
*obj
,
244 const char *type
, struct blob_attr
*msg
,
245 struct ubus_notify_request
*req
, bool reply
)
247 memset(req
, 0, sizeof(*req
));
249 blob_buf_init(&b
, 0);
250 blob_put_int32(&b
, UBUS_ATTR_OBJID
, obj
->id
);
251 blob_put_string(&b
, UBUS_ATTR_METHOD
, type
);
254 blob_put_int8(&b
, UBUS_ATTR_NO_REPLY
, true);
257 blob_put(&b
, UBUS_ATTR_DATA
, blob_data(msg
), blob_len(msg
));
259 if (ubus_start_request(ctx
, &req
->req
, b
.head
, UBUS_MSG_NOTIFY
, obj
->id
) < 0)
260 return UBUS_STATUS_INVALID_ARGUMENT
;
262 /* wait for status message from ubusd first */
263 req
->req
.notify
= true;
265 req
->id
[0] = obj
->id
;
266 req
->req
.complete_cb
= ubus_notify_complete_cb
;
271 int ubus_notify_async(struct ubus_context
*ctx
, struct ubus_object
*obj
,
272 const char *type
, struct blob_attr
*msg
,
273 struct ubus_notify_request
*req
)
275 return __ubus_notify_async(ctx
, obj
, type
, msg
, req
, true);
278 int ubus_notify(struct ubus_context
*ctx
, struct ubus_object
*obj
,
279 const char *type
, struct blob_attr
*msg
, int timeout
)
281 struct ubus_notify_request req
;
284 ret
= __ubus_notify_async(ctx
, obj
, type
, msg
, &req
, timeout
>= 0);
289 ubus_abort_request(ctx
, &req
.req
);
293 return ubus_complete_request(ctx
, &req
.req
, timeout
);
296 static bool ubus_get_status(struct ubus_msghdr
*hdr
, int *ret
)
298 struct blob_attr
**attrbuf
= ubus_parse_msg(ubus_msghdr_data(hdr
));
300 if (!attrbuf
[UBUS_ATTR_STATUS
])
303 *ret
= blob_get_u32(attrbuf
[UBUS_ATTR_STATUS
]);
308 ubus_process_req_status(struct ubus_request
*req
, struct ubus_msghdr
*hdr
)
310 int ret
= UBUS_STATUS_INVALID_ARGUMENT
;
312 ubus_get_status(hdr
, &ret
);
313 req
->peer
= hdr
->peer
;
314 ubus_set_req_status(req
, ret
);
320 ubus_process_req_data(struct ubus_request
*req
, struct ubus_msghdr
*hdr
)
322 struct blob_attr
*msg_data
= ubus_msghdr_data(hdr
);
323 struct ubus_pending_data
*data
;
328 req_data_cb(req
, hdr
->type
, msg_data
);
329 __ubus_process_req_data(req
);
330 req
->blocked
= false;
333 ubus_req_complete_cb(req
);
338 len
= blob_raw_len(msg_data
);
339 data
= calloc(1, sizeof(*data
) + len
);
343 data
->type
= hdr
->type
;
344 memcpy(data
->data
, msg_data
, len
);
345 list_add(&data
->list
, &req
->pending
);
349 ubus_find_notify_id(struct ubus_notify_request
*n
, uint32_t objid
)
351 uint32_t pending
= n
->pending
;
354 for (i
= 0; pending
; i
++, pending
>>= 1) {
358 if (n
->id
[i
] == objid
)
365 static struct ubus_request
*
366 ubus_find_request(struct ubus_context
*ctx
, uint32_t seq
, uint32_t peer
, int *id
)
368 struct ubus_request
*req
;
370 list_for_each_entry(req
, &ctx
->requests
, list
) {
371 struct ubus_notify_request
*nreq
;
372 nreq
= container_of(req
, struct ubus_notify_request
, req
);
381 *id
= ubus_find_notify_id(nreq
, peer
);
384 } else if (peer
!= req
->peer
)
392 static void ubus_process_notify_status(struct ubus_request
*req
, int id
, struct ubus_msghdr
*hdr
)
394 struct ubus_notify_request
*nreq
;
395 struct blob_attr
**tb
;
396 struct blob_attr
*cur
;
400 nreq
= container_of(req
, struct ubus_notify_request
, req
);
401 nreq
->pending
&= ~(1 << id
);
404 /* first id: ubusd's status message with a list of ids */
405 tb
= ubus_parse_msg(ubus_msghdr_data(hdr
));
406 if (tb
[UBUS_ATTR_SUBSCRIBERS
]) {
407 blob_for_each_attr(cur
, tb
[UBUS_ATTR_SUBSCRIBERS
], rem
) {
408 if (!blob_check_type(blob_data(cur
), blob_len(cur
), BLOB_ATTR_INT32
))
411 nreq
->pending
|= (1 << idx
);
412 nreq
->id
[idx
] = blob_get_int32(cur
);
415 if (idx
== UBUS_MAX_NOTIFY_PEERS
+ 1)
420 ubus_get_status(hdr
, &ret
);
422 nreq
->status_cb(nreq
, id
, ret
);
426 ubus_set_req_status(req
, 0);
429 void __hidden
ubus_process_req_msg(struct ubus_context
*ctx
, struct ubus_msghdr
*hdr
, int fd
)
431 struct ubus_request
*req
;
435 case UBUS_MSG_STATUS
:
436 req
= ubus_find_request(ctx
, hdr
->seq
, hdr
->peer
, &id
);
448 ubus_process_notify_status(req
, id
, hdr
);
450 ubus_process_req_status(req
, hdr
);
454 req
= ubus_find_request(ctx
, hdr
->seq
, hdr
->peer
, &id
);
455 if (req
&& (req
->data_cb
|| req
->raw_data_cb
))
456 ubus_process_req_data(req
, hdr
);