2 * Copyright (C) 2011 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.
14 #include <sys/types.h>
16 #include <sys/socket.h>
21 #include <libubox/blob.h>
22 #include <libubox/blobmsg.h>
23 #include <libubox/usock.h>
28 #define STATIC_IOV(_var) { .iov_base = (char *) &(_var), .iov_len = sizeof(_var) }
30 const char *__ubus_strerror
[__UBUS_STATUS_LAST
] = {
31 [UBUS_STATUS_OK
] = "Success",
32 [UBUS_STATUS_INVALID_COMMAND
] = "Invalid command",
33 [UBUS_STATUS_INVALID_ARGUMENT
] = "Invalid argument",
34 [UBUS_STATUS_METHOD_NOT_FOUND
] = "Method not found",
35 [UBUS_STATUS_NOT_FOUND
] = "Not found",
36 [UBUS_STATUS_NO_DATA
] = "No response",
37 [UBUS_STATUS_PERMISSION_DENIED
] = "Permission denied",
38 [UBUS_STATUS_TIMEOUT
] = "Request timed out",
39 [UBUS_STATUS_NOT_SUPPORTED
] = "Operation not supported",
40 [UBUS_STATUS_UNKNOWN_ERROR
] = "Unknown error",
41 [UBUS_STATUS_CONNECTION_FAILED
] = "Connection failed",
44 static struct blob_buf b
;
46 static const struct blob_attr_info ubus_policy
[UBUS_ATTR_MAX
] = {
47 [UBUS_ATTR_STATUS
] = { .type
= BLOB_ATTR_INT32
},
48 [UBUS_ATTR_OBJID
] = { .type
= BLOB_ATTR_INT32
},
49 [UBUS_ATTR_OBJPATH
] = { .type
= BLOB_ATTR_STRING
},
50 [UBUS_ATTR_METHOD
] = { .type
= BLOB_ATTR_STRING
},
52 static struct blob_attr
*attrbuf
[UBUS_ATTR_MAX
];
54 struct ubus_pending_data
{
55 struct list_head list
;
57 struct blob_attr data
[];
60 struct ubus_pending_invoke
{
61 struct list_head list
;
62 struct ubus_msghdr hdr
;
65 static void ubus_process_pending_invoke(struct ubus_context
*ctx
);
67 static int ubus_cmp_id(const void *k1
, const void *k2
, void *ptr
)
69 const uint32_t *id1
= k1
, *id2
= k2
;
77 static struct blob_attr
**ubus_parse_msg(struct blob_attr
*msg
)
79 blob_parse(msg
, attrbuf
, ubus_policy
, UBUS_ATTR_MAX
);
83 const char *ubus_strerror(int error
)
87 if (error
< 0 || error
>= __UBUS_STATUS_LAST
)
90 if (!__ubus_strerror
[error
])
93 return __ubus_strerror
[error
];
96 sprintf(err
, "Unknown error: %d", error
);
100 static void wait_data(int fd
, bool write
)
102 struct pollfd pfd
= { .fd
= fd
};
104 pfd
.events
= write
? POLLOUT
: POLLIN
;
108 static int writev_retry(int fd
, struct iovec
*iov
, int iov_len
)
113 int cur_len
= writev(fd
, iov
, iov_len
);
127 while (cur_len
>= iov
->iov_len
) {
128 cur_len
-= iov
->iov_len
;
131 if (!cur_len
|| !iov_len
)
134 iov
->iov_len
-= cur_len
;
138 static int ubus_send_msg(struct ubus_context
*ctx
, uint32_t seq
,
139 struct blob_attr
*msg
, int cmd
, uint32_t peer
)
141 struct ubus_msghdr hdr
;
142 struct iovec iov
[2] = {
152 blob_buf_init(&b
, 0);
156 iov
[1].iov_base
= (char *) msg
;
157 iov
[1].iov_len
= blob_raw_len(msg
);
159 return writev_retry(ctx
->sock
.fd
, iov
, ARRAY_SIZE(iov
));
162 static int ubus_start_request(struct ubus_context
*ctx
, struct ubus_request
*req
,
163 struct blob_attr
*msg
, int cmd
, uint32_t peer
)
165 memset(req
, 0, sizeof(*req
));
167 if (msg
&& blob_pad_len(msg
) > UBUS_MAX_MSGLEN
)
170 INIT_LIST_HEAD(&req
->list
);
171 INIT_LIST_HEAD(&req
->pending
);
174 req
->seq
= ++ctx
->request_seq
;
175 return ubus_send_msg(ctx
, req
->seq
, msg
, cmd
, peer
);
178 static bool recv_retry(int fd
, struct iovec
*iov
, bool wait
)
182 while (iov
->iov_len
> 0) {
184 wait_data(fd
, false);
186 bytes
= read(fd
, iov
->iov_base
, iov
->iov_len
);
201 iov
->iov_len
-= bytes
;
202 iov
->iov_base
+= bytes
;
208 static bool ubus_validate_hdr(struct ubus_msghdr
*hdr
)
210 if (hdr
->version
!= 0)
213 if (blob_raw_len(hdr
->data
) < sizeof(*hdr
->data
))
216 if (blob_pad_len(hdr
->data
) > UBUS_MAX_MSGLEN
)
222 static bool get_next_msg(struct ubus_context
*ctx
)
224 struct iovec iov
= STATIC_IOV(ctx
->msgbuf
.hdr
);
226 /* receive header + start attribute */
227 iov
.iov_len
+= sizeof(struct blob_attr
);
228 if (!recv_retry(ctx
->sock
.fd
, &iov
, false))
231 iov
.iov_len
= blob_len(ctx
->msgbuf
.hdr
.data
);
232 if (iov
.iov_len
> 0 && !recv_retry(ctx
->sock
.fd
, &iov
, true))
235 return ubus_validate_hdr(&ctx
->msgbuf
.hdr
);
238 static bool ubus_get_status(struct ubus_msghdr
*hdr
, int *ret
)
240 ubus_parse_msg(hdr
->data
);
242 if (!attrbuf
[UBUS_ATTR_STATUS
])
245 *ret
= blob_get_u32(attrbuf
[UBUS_ATTR_STATUS
]);
249 static void req_data_cb(struct ubus_request
*req
, int type
, struct blob_attr
*data
)
251 struct blob_attr
**attr
;
253 if (req
->raw_data_cb
)
254 req
->raw_data_cb(req
, type
, data
);
259 attr
= ubus_parse_msg(data
);
260 req
->data_cb(req
, type
, attr
[UBUS_ATTR_DATA
]);
263 static void ubus_process_req_data(struct ubus_request
*req
)
265 struct ubus_pending_data
*data
;
267 while (!list_empty(&req
->pending
)) {
268 data
= list_first_entry(&req
->pending
,
269 struct ubus_pending_data
, list
);
270 list_del(&data
->list
);
272 req_data_cb(req
, data
->type
, data
->data
);
277 static void ubus_req_complete_cb(struct ubus_request
*req
)
279 ubus_complete_handler_t cb
= req
->complete_cb
;
284 req
->complete_cb
= NULL
;
285 cb(req
, req
->status_code
);
288 static int ubus_process_req_status(struct ubus_request
*req
, struct ubus_msghdr
*hdr
)
290 int ret
= UBUS_STATUS_INVALID_ARGUMENT
;
292 if (!list_empty(&req
->list
))
293 list_del_init(&req
->list
);
295 ubus_get_status(hdr
, &ret
);
296 req
->peer
= hdr
->peer
;
297 req
->status_msg
= true;
298 req
->status_code
= ret
;
300 ubus_req_complete_cb(req
);
305 static void ubus_req_data(struct ubus_request
*req
, struct ubus_msghdr
*hdr
)
307 struct ubus_pending_data
*data
;
312 req_data_cb(req
, hdr
->type
, hdr
->data
);
313 ubus_process_req_data(req
);
314 req
->blocked
= false;
317 ubus_req_complete_cb(req
);
322 len
= blob_raw_len(hdr
->data
);
323 data
= calloc(1, sizeof(*data
) + len
);
327 data
->type
= hdr
->type
;
328 memcpy(data
->data
, hdr
->data
, len
);
329 list_add(&data
->list
, &req
->pending
);
332 static struct ubus_request
*ubus_find_request(struct ubus_context
*ctx
, uint32_t seq
, uint32_t peer
)
334 struct ubus_request
*req
;
336 list_for_each_entry(req
, &ctx
->requests
, list
) {
337 if (seq
!= req
->seq
|| peer
!= req
->peer
)
345 void ubus_complete_deferred_request(struct ubus_context
*ctx
, struct ubus_request_data
*req
, int ret
)
347 blob_buf_init(&b
, 0);
348 blob_put_int32(&b
, UBUS_ATTR_STATUS
, ret
);
349 blob_put_int32(&b
, UBUS_ATTR_OBJID
, req
->object
);
350 ubus_send_msg(ctx
, req
->seq
, b
.head
, UBUS_MSG_STATUS
, req
->peer
);
353 static void ubus_process_invoke(struct ubus_context
*ctx
, struct ubus_msghdr
*hdr
)
355 struct ubus_request_data req
;
356 struct ubus_object
*obj
;
360 req
.peer
= hdr
->peer
;
362 ubus_parse_msg(hdr
->data
);
364 if (!attrbuf
[UBUS_ATTR_OBJID
])
367 req
.object
= blob_get_u32(attrbuf
[UBUS_ATTR_OBJID
]);
369 if (!attrbuf
[UBUS_ATTR_METHOD
]) {
370 ret
= UBUS_STATUS_INVALID_ARGUMENT
;
374 obj
= avl_find_element(&ctx
->objects
, &req
.object
, obj
, avl
);
376 ret
= UBUS_STATUS_NOT_FOUND
;
380 for (method
= 0; method
< obj
->n_methods
; method
++)
381 if (!obj
->methods
[method
].name
||
382 !strcmp(obj
->methods
[method
].name
,
383 blob_data(attrbuf
[UBUS_ATTR_METHOD
])))
387 ret
= UBUS_STATUS_METHOD_NOT_FOUND
;
391 ret
= obj
->methods
[method
].handler(ctx
, obj
, &req
,
392 blob_data(attrbuf
[UBUS_ATTR_METHOD
]),
393 attrbuf
[UBUS_ATTR_DATA
]);
398 ubus_complete_deferred_request(ctx
, &req
, ret
);
401 static void ubus_process_msg(struct ubus_context
*ctx
, struct ubus_msghdr
*hdr
)
403 struct ubus_pending_invoke
*pending
;
404 struct ubus_request
*req
;
407 case UBUS_MSG_STATUS
:
408 req
= ubus_find_request(ctx
, hdr
->seq
, hdr
->peer
);
412 ubus_process_req_status(req
, hdr
);
416 req
= ubus_find_request(ctx
, hdr
->seq
, hdr
->peer
);
417 if (req
&& (req
->data_cb
|| req
->raw_data_cb
))
418 ubus_req_data(req
, hdr
);
421 case UBUS_MSG_INVOKE
:
422 if (ctx
->stack_depth
> 2) {
423 pending
= calloc(1, sizeof(*pending
) +
424 blob_raw_len(hdr
->data
));
429 memcpy(&pending
->hdr
, hdr
, sizeof(*hdr
) +
430 blob_raw_len(hdr
->data
));
431 list_add(&pending
->list
, &ctx
->pending
);
433 ubus_process_invoke(ctx
, hdr
);
439 static void ubus_process_pending_invoke(struct ubus_context
*ctx
)
441 struct ubus_pending_invoke
*pending
, *tmp
;
443 list_for_each_entry_safe(pending
, tmp
, &ctx
->pending
, list
) {
444 list_del(&pending
->list
);
445 ubus_process_msg(ctx
, &pending
->hdr
);
447 if (ctx
->stack_depth
> 2)
452 void ubus_abort_request(struct ubus_context
*ctx
, struct ubus_request
*req
)
454 if (!list_empty(&req
->list
))
457 req
->cancelled
= true;
458 ubus_process_req_data(req
);
459 list_del_init(&req
->list
);
462 void ubus_complete_request_async(struct ubus_context
*ctx
, struct ubus_request
*req
)
464 if (!list_empty(&req
->list
))
467 list_add(&req
->list
, &ctx
->requests
);
470 static void ubus_handle_data(struct uloop_fd
*u
, unsigned int events
)
472 struct ubus_context
*ctx
= container_of(u
, struct ubus_context
, sock
);
473 struct ubus_msghdr
*hdr
= &ctx
->msgbuf
.hdr
;
475 while (get_next_msg(ctx
)) {
476 ubus_process_msg(ctx
, hdr
);
482 ctx
->connection_lost(ctx
);
485 static void ubus_sync_req_cb(struct ubus_request
*req
, int ret
)
487 req
->status_msg
= true;
488 req
->status_code
= ret
;
492 struct ubus_sync_req_cb
{
493 struct uloop_timeout timeout
;
494 struct ubus_request
*req
;
497 static void ubus_sync_req_timeout_cb(struct uloop_timeout
*timeout
)
499 struct ubus_sync_req_cb
*cb
;
501 cb
= container_of(timeout
, struct ubus_sync_req_cb
, timeout
);
502 ubus_sync_req_cb(cb
->req
, UBUS_STATUS_TIMEOUT
);
505 int ubus_complete_request(struct ubus_context
*ctx
, struct ubus_request
*req
,
508 struct ubus_sync_req_cb cb
;
509 ubus_complete_handler_t complete_cb
= req
->complete_cb
;
510 bool registered
= ctx
->sock
.registered
;
511 int status
= UBUS_STATUS_NO_DATA
;
519 memset(&cb
, 0, sizeof(cb
));
521 cb
.timeout
.cb
= ubus_sync_req_timeout_cb
;
522 uloop_timeout_set(&cb
.timeout
, timeout
);
525 ubus_complete_request_async(ctx
, req
);
526 req
->complete_cb
= ubus_sync_req_cb
;
529 while (!req
->status_msg
) {
530 bool cancelled
= uloop_cancelled
;
531 uloop_cancelled
= false;
533 uloop_cancelled
= cancelled
;
538 uloop_timeout_cancel(&cb
.timeout
);
541 status
= req
->status_code
;
543 req
->complete_cb
= complete_cb
;
544 if (req
->complete_cb
)
545 req
->complete_cb(req
, status
);
548 uloop_fd_delete(&ctx
->sock
);
550 if (!ctx
->stack_depth
)
551 ubus_process_pending_invoke(ctx
);
556 struct ubus_lookup_request
{
557 struct ubus_request req
;
558 ubus_lookup_handler_t cb
;
561 static void ubus_lookup_cb(struct ubus_request
*ureq
, int type
, struct blob_attr
*msg
)
563 struct ubus_lookup_request
*req
;
564 struct ubus_object_data obj
;
565 struct blob_attr
**attr
;
567 req
= container_of(ureq
, struct ubus_lookup_request
, req
);
568 attr
= ubus_parse_msg(msg
);
570 if (!attr
[UBUS_ATTR_OBJID
] || !attr
[UBUS_ATTR_OBJPATH
] ||
571 !attr
[UBUS_ATTR_OBJTYPE
])
574 memset(&obj
, 0, sizeof(obj
));
575 obj
.id
= blob_get_u32(attr
[UBUS_ATTR_OBJID
]);
576 obj
.path
= blob_data(attr
[UBUS_ATTR_OBJPATH
]);
577 obj
.type_id
= blob_get_u32(attr
[UBUS_ATTR_OBJTYPE
]);
578 obj
.signature
= attr
[UBUS_ATTR_SIGNATURE
];
579 req
->cb(ureq
->ctx
, &obj
, ureq
->priv
);
582 int ubus_lookup(struct ubus_context
*ctx
, const char *path
,
583 ubus_lookup_handler_t cb
, void *priv
)
585 struct ubus_lookup_request lookup
;
587 blob_buf_init(&b
, 0);
589 blob_put_string(&b
, UBUS_ATTR_OBJPATH
, path
);
591 if (ubus_start_request(ctx
, &lookup
.req
, b
.head
, UBUS_MSG_LOOKUP
, 0) < 0)
592 return UBUS_STATUS_INVALID_ARGUMENT
;
594 lookup
.req
.raw_data_cb
= ubus_lookup_cb
;
595 lookup
.req
.priv
= priv
;
597 return ubus_complete_request(ctx
, &lookup
.req
, 0);
600 static void ubus_lookup_id_cb(struct ubus_request
*req
, int type
, struct blob_attr
*msg
)
602 struct blob_attr
**attr
;
603 uint32_t *id
= req
->priv
;
605 attr
= ubus_parse_msg(msg
);
607 if (!attr
[UBUS_ATTR_OBJID
])
610 *id
= blob_get_u32(attr
[UBUS_ATTR_OBJID
]);
613 int ubus_lookup_id(struct ubus_context
*ctx
, const char *path
, uint32_t *id
)
615 struct ubus_request req
;
617 blob_buf_init(&b
, 0);
619 blob_put_string(&b
, UBUS_ATTR_OBJPATH
, path
);
621 if (ubus_start_request(ctx
, &req
, b
.head
, UBUS_MSG_LOOKUP
, 0) < 0)
622 return UBUS_STATUS_INVALID_ARGUMENT
;
624 req
.raw_data_cb
= ubus_lookup_id_cb
;
627 return ubus_complete_request(ctx
, &req
, 0);
630 int ubus_send_reply(struct ubus_context
*ctx
, struct ubus_request_data
*req
,
631 struct blob_attr
*msg
)
635 blob_buf_init(&b
, 0);
636 blob_put_int32(&b
, UBUS_ATTR_OBJID
, req
->object
);
637 blob_put(&b
, UBUS_ATTR_DATA
, blob_data(msg
), blob_len(msg
));
638 ret
= ubus_send_msg(ctx
, req
->seq
, b
.head
, UBUS_MSG_DATA
, req
->peer
);
640 return UBUS_STATUS_NO_DATA
;
645 int ubus_invoke_async(struct ubus_context
*ctx
, uint32_t obj
, const char *method
,
646 struct blob_attr
*msg
, struct ubus_request
*req
)
648 blob_buf_init(&b
, 0);
649 blob_put_int32(&b
, UBUS_ATTR_OBJID
, obj
);
650 blob_put_string(&b
, UBUS_ATTR_METHOD
, method
);
652 blob_put(&b
, UBUS_ATTR_DATA
, blob_data(msg
), blob_len(msg
));
654 if (ubus_start_request(ctx
, req
, b
.head
, UBUS_MSG_INVOKE
, obj
) < 0)
655 return UBUS_STATUS_INVALID_ARGUMENT
;
660 int ubus_invoke(struct ubus_context
*ctx
, uint32_t obj
, const char *method
,
661 struct blob_attr
*msg
, ubus_data_handler_t cb
, void *priv
,
664 struct ubus_request req
;
666 ubus_invoke_async(ctx
, obj
, method
, msg
, &req
);
669 return ubus_complete_request(ctx
, &req
, timeout
);
672 static void ubus_add_object_cb(struct ubus_request
*req
, int type
, struct blob_attr
*msg
)
674 struct ubus_object
*obj
= req
->priv
;
678 if (!attrbuf
[UBUS_ATTR_OBJID
])
681 obj
->id
= blob_get_u32(attrbuf
[UBUS_ATTR_OBJID
]);
683 if (attrbuf
[UBUS_ATTR_OBJTYPE
])
684 obj
->type
->id
= blob_get_u32(attrbuf
[UBUS_ATTR_OBJTYPE
]);
686 obj
->avl
.key
= &obj
->id
;
687 avl_insert(&req
->ctx
->objects
, &obj
->avl
);
690 static void ubus_push_method_data(const struct ubus_method
*m
)
695 mtbl
= blobmsg_open_table(&b
, m
->name
);
697 for (i
= 0; i
< m
->n_policy
; i
++)
698 blobmsg_add_u32(&b
, m
->policy
[i
].name
, m
->policy
[i
].type
);
700 blobmsg_close_table(&b
, mtbl
);
703 static bool ubus_push_object_type(const struct ubus_object_type
*type
)
708 s
= blob_nest_start(&b
, UBUS_ATTR_SIGNATURE
);
710 for (i
= 0; i
< type
->n_methods
; i
++)
711 ubus_push_method_data(&type
->methods
[i
]);
713 blob_nest_end(&b
, s
);
718 int ubus_add_object(struct ubus_context
*ctx
, struct ubus_object
*obj
)
720 struct ubus_request req
;
723 blob_buf_init(&b
, 0);
725 if (obj
->name
&& obj
->type
) {
726 blob_put_string(&b
, UBUS_ATTR_OBJPATH
, obj
->name
);
729 blob_put_int32(&b
, UBUS_ATTR_OBJTYPE
, obj
->type
->id
);
730 else if (!ubus_push_object_type(obj
->type
))
731 return UBUS_STATUS_INVALID_ARGUMENT
;
734 if (ubus_start_request(ctx
, &req
, b
.head
, UBUS_MSG_ADD_OBJECT
, 0) < 0)
735 return UBUS_STATUS_INVALID_ARGUMENT
;
737 req
.raw_data_cb
= ubus_add_object_cb
;
739 ret
= ubus_complete_request(ctx
, &req
, 0);
744 return UBUS_STATUS_NO_DATA
;
749 static void ubus_remove_object_cb(struct ubus_request
*req
, int type
, struct blob_attr
*msg
)
751 struct ubus_object
*obj
= req
->priv
;
755 if (!attrbuf
[UBUS_ATTR_OBJID
])
760 if (attrbuf
[UBUS_ATTR_OBJTYPE
] && obj
->type
)
763 avl_delete(&req
->ctx
->objects
, &obj
->avl
);
766 int ubus_remove_object(struct ubus_context
*ctx
, struct ubus_object
*obj
)
768 struct ubus_request req
;
771 blob_buf_init(&b
, 0);
772 blob_put_int32(&b
, UBUS_ATTR_OBJID
, obj
->id
);
774 if (ubus_start_request(ctx
, &req
, b
.head
, UBUS_MSG_REMOVE_OBJECT
, 0) < 0)
775 return UBUS_STATUS_INVALID_ARGUMENT
;
777 req
.raw_data_cb
= ubus_remove_object_cb
;
779 ret
= ubus_complete_request(ctx
, &req
, 0);
784 return UBUS_STATUS_NO_DATA
;
789 static int ubus_event_cb(struct ubus_context
*ctx
, struct ubus_object
*obj
,
790 struct ubus_request_data
*req
,
791 const char *method
, struct blob_attr
*msg
)
793 struct ubus_event_handler
*ev
;
795 ev
= container_of(obj
, struct ubus_event_handler
, obj
);
796 ev
->cb(ctx
, ev
, method
, msg
);
800 static const struct ubus_method event_method
= {
802 .handler
= ubus_event_cb
,
805 int ubus_register_event_handler(struct ubus_context
*ctx
,
806 struct ubus_event_handler
*ev
,
809 struct ubus_object
*obj
= &ev
->obj
;
814 obj
->methods
= &event_method
;
817 if (!!obj
->name
^ !!obj
->type
)
818 return UBUS_STATUS_INVALID_ARGUMENT
;
820 ret
= ubus_add_object(ctx
, obj
);
825 /* use a second buffer, ubus_invoke() overwrites the primary one */
826 memset(&b2
, 0, sizeof(b2
));
827 blob_buf_init(&b2
, 0);
828 blobmsg_add_u32(&b2
, "object", obj
->id
);
830 blobmsg_add_string(&b2
, "pattern", pattern
);
832 return ubus_invoke(ctx
, UBUS_SYSTEM_OBJECT_EVENT
, "register", b2
.head
,
842 static const struct blobmsg_policy watch_policy
[] = {
843 [WATCH_ID
] = { .name
= "id", .type
= BLOBMSG_TYPE_INT32
},
844 [WATCH_NOTIFY
] = { .name
= "notify", .type
= BLOBMSG_TYPE_STRING
},
848 static int ubus_watch_cb(struct ubus_context
*ctx
, struct ubus_object
*obj
,
849 struct ubus_request_data
*req
,
850 const char *method
, struct blob_attr
*msg
)
852 struct ubus_watch_object
*w
;
853 struct blob_attr
*tb
[__WATCH_MAX
];
855 blobmsg_parse(watch_policy
, ARRAY_SIZE(watch_policy
), tb
, blob_data(msg
), blob_len(msg
));
857 if (!tb
[WATCH_ID
] || !tb
[WATCH_NOTIFY
])
858 return UBUS_STATUS_INVALID_ARGUMENT
;
861 return UBUS_STATUS_INVALID_ARGUMENT
;
863 w
= container_of(obj
, struct ubus_watch_object
, obj
);
864 w
->cb(ctx
, w
, blobmsg_get_u32(tb
[WATCH_ID
]));
868 static const struct ubus_method watch_method
= {
870 .handler
= ubus_watch_cb
,
873 int ubus_register_watch_object(struct ubus_context
*ctx
, struct ubus_watch_object
*w_obj
)
875 struct ubus_object
*obj
= &w_obj
->obj
;
877 obj
->methods
= &watch_method
;
880 return ubus_add_object(ctx
, obj
);
884 __ubus_watch_request(struct ubus_context
*ctx
, struct ubus_object
*obj
, uint32_t id
, const char *method
, int type
)
886 struct ubus_request req
;
888 blob_buf_init(&b
, 0);
889 blob_put_int32(&b
, UBUS_ATTR_OBJID
, obj
->id
);
890 blob_put_int32(&b
, UBUS_ATTR_TARGET
, id
);
892 blob_put_string(&b
, UBUS_ATTR_METHOD
, method
);
894 if (ubus_start_request(ctx
, &req
, b
.head
, type
, 0) < 0)
895 return UBUS_STATUS_INVALID_ARGUMENT
;
897 return ubus_complete_request(ctx
, &req
, 0);
901 int ubus_watch_object_add(struct ubus_context
*ctx
, struct ubus_watch_object
*obj
, uint32_t id
)
903 return __ubus_watch_request(ctx
, &obj
->obj
, id
, "event", UBUS_MSG_ADD_WATCH
);
906 int ubus_watch_object_remove(struct ubus_context
*ctx
, struct ubus_watch_object
*obj
, uint32_t id
)
908 return __ubus_watch_request(ctx
, &obj
->obj
, id
, NULL
, UBUS_MSG_REMOVE_WATCH
);
911 int ubus_send_event(struct ubus_context
*ctx
, const char *id
,
912 struct blob_attr
*data
)
914 struct ubus_request req
;
917 blob_buf_init(&b
, 0);
918 blob_put_int32(&b
, UBUS_ATTR_OBJID
, UBUS_SYSTEM_OBJECT_EVENT
);
919 blob_put_string(&b
, UBUS_ATTR_METHOD
, "send");
920 s
= blob_nest_start(&b
, UBUS_ATTR_DATA
);
921 blobmsg_add_string(&b
, "id", id
);
922 blobmsg_add_field(&b
, BLOBMSG_TYPE_TABLE
, "data", blob_data(data
), blob_len(data
));
923 blob_nest_end(&b
, s
);
925 if (ubus_start_request(ctx
, &req
, b
.head
, UBUS_MSG_INVOKE
, UBUS_SYSTEM_OBJECT_EVENT
) < 0)
926 return UBUS_STATUS_INVALID_ARGUMENT
;
928 return ubus_complete_request(ctx
, &req
, 0);
932 ubus_refresh_state(struct ubus_context
*ctx
)
934 struct ubus_object
*obj
, *tmp
;
936 /* clear all type IDs, they need to be registered again */
937 avl_for_each_element(&ctx
->objects
, obj
, avl
)
940 /* push out all objects again */
941 avl_for_each_element_safe(&ctx
->objects
, obj
, avl
, tmp
) {
943 avl_delete(&ctx
->objects
, &obj
->avl
);
944 ubus_add_object(ctx
, obj
);
948 int ubus_reconnect(struct ubus_context
*ctx
, const char *path
)
951 struct ubus_msghdr hdr
;
952 struct blob_attr data
;
954 struct blob_attr
*buf
;
955 int ret
= UBUS_STATUS_UNKNOWN_ERROR
;
958 path
= UBUS_UNIX_SOCKET
;
960 if (ctx
->sock
.fd
>= 0) {
961 if (ctx
->sock
.registered
)
962 uloop_fd_delete(&ctx
->sock
);
967 ctx
->sock
.fd
= usock(USOCK_UNIX
, path
, NULL
);
968 if (ctx
->sock
.fd
< 0)
969 return UBUS_STATUS_CONNECTION_FAILED
;
971 if (read(ctx
->sock
.fd
, &hdr
, sizeof(hdr
)) != sizeof(hdr
))
974 if (!ubus_validate_hdr(&hdr
.hdr
))
977 if (hdr
.hdr
.type
!= UBUS_MSG_HELLO
)
980 buf
= calloc(1, blob_raw_len(&hdr
.data
));
984 memcpy(buf
, &hdr
.data
, sizeof(hdr
.data
));
985 if (read(ctx
->sock
.fd
, blob_data(buf
), blob_len(buf
)) != blob_len(buf
))
988 ctx
->local_id
= hdr
.hdr
.peer
;
992 ret
= UBUS_STATUS_OK
;
993 fcntl(ctx
->sock
.fd
, F_SETFL
, fcntl(ctx
->sock
.fd
, F_GETFL
) | O_NONBLOCK
);
995 ubus_refresh_state(ctx
);
1001 close(ctx
->sock
.fd
);
1006 static void ubus_default_connection_lost(struct ubus_context
*ctx
)
1008 if (ctx
->sock
.registered
)
1012 struct ubus_context
*ubus_connect(const char *path
)
1014 struct ubus_context
*ctx
;
1016 ctx
= calloc(1, sizeof(*ctx
));
1021 ctx
->sock
.cb
= ubus_handle_data
;
1022 ctx
->connection_lost
= ubus_default_connection_lost
;
1024 INIT_LIST_HEAD(&ctx
->requests
);
1025 INIT_LIST_HEAD(&ctx
->pending
);
1026 avl_init(&ctx
->objects
, ubus_cmp_id
, false, NULL
);
1027 if (ubus_reconnect(ctx
, path
)) {
1035 void ubus_free(struct ubus_context
*ctx
)
1037 close(ctx
->sock
.fd
);