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(ubus_msghdr_data(hdr));
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 blob_attr *msg_data = ubus_msghdr_data(hdr);
325 struct ubus_pending_data *data;
330 req_data_cb(req, hdr->type, msg_data);
331 __ubus_process_req_data(req);
332 req->blocked = false;
335 ubus_req_complete_cb(req);
340 len = blob_raw_len(msg_data);
341 data = calloc(1, sizeof(*data) + len);
345 data->type = hdr->type;
346 memcpy(data->data, msg_data, len);
347 list_add(&data->list, &req->pending);
351 ubus_find_notify_id(struct ubus_notify_request *n, uint32_t objid)
353 uint32_t pending = n->pending;
356 for (i = 0; pending; i++, pending >>= 1) {
360 if (n->id[i] == objid)
367 static struct ubus_request *
368 ubus_find_request(struct ubus_context *ctx, uint32_t seq, uint32_t peer, int *id)
370 struct ubus_request *req;
372 list_for_each_entry(req, &ctx->requests, list) {
373 struct ubus_notify_request *nreq;
374 nreq = container_of(req, struct ubus_notify_request, req);
383 *id = ubus_find_notify_id(nreq, peer);
386 } else if (peer != req->peer)
394 static void ubus_process_notify_status(struct ubus_request *req, int id, struct ubus_msghdr *hdr)
396 struct ubus_notify_request *nreq;
397 struct blob_attr **tb;
398 struct blob_attr *cur;
402 nreq = container_of(req, struct ubus_notify_request, req);
403 nreq->pending &= ~(1 << id);
406 /* first id: ubusd's status message with a list of ids */
407 tb = ubus_parse_msg(ubus_msghdr_data(hdr));
408 if (tb[UBUS_ATTR_SUBSCRIBERS]) {
409 blob_for_each_attr(cur, tb[UBUS_ATTR_SUBSCRIBERS], rem) {
410 if (!blob_check_type(blob_data(cur), blob_len(cur), BLOB_ATTR_INT32))
413 nreq->pending |= (1 << idx);
414 nreq->id[idx] = blob_get_int32(cur);
417 if (idx == UBUS_MAX_NOTIFY_PEERS + 1)
422 ubus_get_status(hdr, &ret);
424 nreq->status_cb(nreq, id, ret);
428 ubus_set_req_status(req, 0);
431 void __hidden ubus_process_req_msg(struct ubus_context *ctx, struct ubus_msghdr *hdr)
433 struct ubus_request *req;
437 case UBUS_MSG_STATUS:
438 req = ubus_find_request(ctx, hdr->seq, hdr->peer, &id);
443 ubus_process_notify_status(req, id, hdr);
445 ubus_process_req_status(req, hdr);
449 req = ubus_find_request(ctx, hdr->seq, hdr->peer, &id);
450 if (req && (req->data_cb || req->raw_data_cb))
451 ubus_process_req_data(req, hdr);