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.
17 #include <libubox/avl.h>
18 #include <libubox/list.h>
19 #include <libubox/blobmsg.h>
20 #include <libubox/uloop.h>
23 #include "ubus_common.h"
25 #define UBUS_MAX_NOTIFY_PEERS 16
31 struct ubus_request_data
;
32 struct ubus_object_data
;
33 struct ubus_event_handler
;
34 struct ubus_subscriber
;
35 struct ubus_notify_request
;
37 static inline struct blob_attr
*
38 ubus_msghdr_data(struct ubus_msghdr
*hdr
)
40 return (struct blob_attr
*) (hdr
+ 1);
43 typedef void (*ubus_lookup_handler_t
)(struct ubus_context
*ctx
,
44 struct ubus_object_data
*obj
,
46 typedef int (*ubus_handler_t
)(struct ubus_context
*ctx
, struct ubus_object
*obj
,
47 struct ubus_request_data
*req
,
48 const char *method
, struct blob_attr
*msg
);
49 typedef void (*ubus_state_handler_t
)(struct ubus_context
*ctx
, struct ubus_object
*obj
);
50 typedef void (*ubus_remove_handler_t
)(struct ubus_context
*ctx
,
51 struct ubus_subscriber
*obj
, uint32_t id
);
52 typedef void (*ubus_event_handler_t
)(struct ubus_context
*ctx
, struct ubus_event_handler
*ev
,
53 const char *type
, struct blob_attr
*msg
);
54 typedef void (*ubus_data_handler_t
)(struct ubus_request
*req
,
55 int type
, struct blob_attr
*msg
);
56 typedef void (*ubus_fd_handler_t
)(struct ubus_request
*req
, int fd
);
57 typedef void (*ubus_complete_handler_t
)(struct ubus_request
*req
, int ret
);
58 typedef void (*ubus_notify_complete_handler_t
)(struct ubus_notify_request
*req
,
60 typedef void (*ubus_connect_handler_t
)(struct ubus_context
*ctx
);
62 #define UBUS_OBJECT_TYPE(_name, _methods) \
66 .n_methods = ARRAY_SIZE(_methods), \
70 #define UBUS_METHOD(_name, _handler, _policy) \
73 .handler = _handler, \
75 .n_policy = ARRAY_SIZE(_policy) \
78 #define UBUS_METHOD_NOARG(_name, _handler) \
81 .handler = _handler, \
86 ubus_handler_t handler
;
88 const struct blobmsg_policy
*policy
;
92 struct ubus_object_type
{
96 const struct ubus_method
*methods
;
107 struct ubus_object_type
*type
;
109 ubus_state_handler_t subscribe_cb
;
110 bool has_subscribers
;
112 const struct ubus_method
*methods
;
116 struct ubus_subscriber
{
117 struct ubus_object obj
;
120 ubus_remove_handler_t remove_cb
;
123 struct ubus_event_handler
{
124 struct ubus_object obj
;
126 ubus_event_handler_t cb
;
129 struct ubus_context
{
130 struct list_head requests
;
131 struct avl_tree objects
;
132 struct list_head pending
;
134 struct uloop_fd sock
;
137 uint16_t request_seq
;
140 void (*connection_lost
)(struct ubus_context
*ctx
);
143 struct ubus_msghdr hdr
;
144 char data
[UBUS_MAX_MSGLEN
];
148 struct ubus_object_data
{
152 struct blob_attr
*signature
;
155 struct ubus_request_data
{
165 struct ubus_request
{
166 struct list_head list
;
168 struct list_head pending
;
178 ubus_data_handler_t raw_data_cb
;
179 ubus_data_handler_t data_cb
;
180 ubus_fd_handler_t fd_cb
;
181 ubus_complete_handler_t complete_cb
;
183 struct ubus_context
*ctx
;
187 struct ubus_notify_request
{
188 struct ubus_request req
;
190 ubus_notify_complete_handler_t status_cb
;
191 ubus_notify_complete_handler_t complete_cb
;
194 uint32_t id
[UBUS_MAX_NOTIFY_PEERS
+ 1];
197 struct ubus_auto_conn
{
198 struct ubus_context ctx
;
199 struct uloop_timeout timer
;
201 ubus_connect_handler_t cb
;
204 struct ubus_context
*ubus_connect(const char *path
);
205 void ubus_auto_connect(struct ubus_auto_conn
*conn
);
206 int ubus_reconnect(struct ubus_context
*ctx
, const char *path
);
207 void ubus_free(struct ubus_context
*ctx
);
209 const char *ubus_strerror(int error
);
211 static inline void ubus_add_uloop(struct ubus_context
*ctx
)
213 uloop_fd_add(&ctx
->sock
, ULOOP_BLOCKING
| ULOOP_READ
);
216 /* call this for read events on ctx->sock.fd when not using uloop */
217 static inline void ubus_handle_event(struct ubus_context
*ctx
)
219 ctx
->sock
.cb(&ctx
->sock
, ULOOP_READ
);
222 /* ----------- raw request handling ----------- */
224 /* wait for a request to complete and return its status */
225 int ubus_complete_request(struct ubus_context
*ctx
, struct ubus_request
*req
,
228 /* complete a request asynchronously */
229 void ubus_complete_request_async(struct ubus_context
*ctx
,
230 struct ubus_request
*req
);
232 /* abort an asynchronous request */
233 void ubus_abort_request(struct ubus_context
*ctx
, struct ubus_request
*req
);
235 /* ----------- objects ----------- */
237 int ubus_lookup(struct ubus_context
*ctx
, const char *path
,
238 ubus_lookup_handler_t cb
, void *priv
);
240 int ubus_lookup_id(struct ubus_context
*ctx
, const char *path
, uint32_t *id
);
242 /* make an object visible to remote connections */
243 int ubus_add_object(struct ubus_context
*ctx
, struct ubus_object
*obj
);
245 /* remove the object from the ubus connection */
246 int ubus_remove_object(struct ubus_context
*ctx
, struct ubus_object
*obj
);
248 /* add a subscriber notifications from another object */
249 int ubus_register_subscriber(struct ubus_context
*ctx
, struct ubus_subscriber
*obj
);
252 ubus_unregister_subscriber(struct ubus_context
*ctx
, struct ubus_subscriber
*obj
)
254 return ubus_remove_object(ctx
, &obj
->obj
);
257 int ubus_subscribe(struct ubus_context
*ctx
, struct ubus_subscriber
*obj
, uint32_t id
);
258 int ubus_unsubscribe(struct ubus_context
*ctx
, struct ubus_subscriber
*obj
, uint32_t id
);
260 /* ----------- rpc ----------- */
262 /* invoke a method on a specific object */
263 int ubus_invoke(struct ubus_context
*ctx
, uint32_t obj
, const char *method
,
264 struct blob_attr
*msg
, ubus_data_handler_t cb
, void *priv
,
267 /* asynchronous version of ubus_invoke() */
268 int ubus_invoke_async(struct ubus_context
*ctx
, uint32_t obj
, const char *method
,
269 struct blob_attr
*msg
, struct ubus_request
*req
);
271 /* send a reply to an incoming object method call */
272 int ubus_send_reply(struct ubus_context
*ctx
, struct ubus_request_data
*req
,
273 struct blob_attr
*msg
);
275 static inline void ubus_defer_request(struct ubus_context
*ctx
,
276 struct ubus_request_data
*req
,
277 struct ubus_request_data
*new_req
)
279 memcpy(new_req
, req
, sizeof(*req
));
280 req
->deferred
= true;
283 static inline void ubus_request_set_fd(struct ubus_context
*ctx
,
284 struct ubus_request_data
*req
, int fd
)
289 void ubus_complete_deferred_request(struct ubus_context
*ctx
,
290 struct ubus_request_data
*req
, int ret
);
293 * send a notification to all subscribers of an object
294 * if timeout < 0, no reply is expected from subscribers
296 int ubus_notify(struct ubus_context
*ctx
, struct ubus_object
*obj
,
297 const char *type
, struct blob_attr
*msg
, int timeout
);
299 int ubus_notify_async(struct ubus_context
*ctx
, struct ubus_object
*obj
,
300 const char *type
, struct blob_attr
*msg
,
301 struct ubus_notify_request
*req
);
304 /* ----------- events ----------- */
306 int ubus_send_event(struct ubus_context
*ctx
, const char *id
,
307 struct blob_attr
*data
);
309 int ubus_register_event_handler(struct ubus_context
*ctx
,
310 struct ubus_event_handler
*ev
,
311 const char *pattern
);
313 static inline int ubus_unregister_event_handler(struct ubus_context
*ctx
,
314 struct ubus_event_handler
*ev
)
316 return ubus_remove_object(ctx
, &ev
->obj
);