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;
162 uloop_timeout_cancel(&cb.timeout);
165 status = req->status_code;
167 req->complete_cb = complete_cb;
168 if (req->complete_cb)
169 req->complete_cb(req, status);
172 uloop_fd_delete(&ctx->sock);
174 if (!ctx->stack_depth)
175 ubus_process_pending_msg(ctx);
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);
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);
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);
291 return ubus_complete_request(ctx, &req.req, timeout);
294 static bool ubus_get_status(struct ubus_msghdr *hdr, int *ret)
296 struct blob_attr **attrbuf = ubus_parse_msg(hdr->data);
298 if (!attrbuf[UBUS_ATTR_STATUS])
301 *ret = blob_get_u32(attrbuf[UBUS_ATTR_STATUS]);
306 ubus_process_req_status(struct ubus_request *req, struct ubus_msghdr *hdr)
308 int ret = UBUS_STATUS_INVALID_ARGUMENT;
310 ubus_get_status(hdr, &ret);
311 req->peer = hdr->peer;
312 ubus_set_req_status(req, ret);
318 ubus_process_req_data(struct ubus_request *req, struct ubus_msghdr *hdr)
320 struct ubus_pending_data *data;
325 req_data_cb(req, hdr->type, hdr->data);
326 __ubus_process_req_data(req);
327 req->blocked = false;
330 ubus_req_complete_cb(req);
335 len = blob_raw_len(hdr->data);
336 data = calloc(1, sizeof(*data) + len);
340 data->type = hdr->type;
341 memcpy(data->data, hdr->data, len);
342 list_add(&data->list, &req->pending);
346 ubus_find_notify_id(struct ubus_notify_request *n, uint32_t objid)
348 uint32_t pending = n->pending;
351 for (i = 0; pending; i++, pending >>= 1) {
355 if (n->id[i] == objid)
362 static struct ubus_request *
363 ubus_find_request(struct ubus_context *ctx, uint32_t seq, uint32_t peer, int *id)
365 struct ubus_request *req;
367 list_for_each_entry(req, &ctx->requests, list) {
368 struct ubus_notify_request *nreq;
369 nreq = container_of(req, struct ubus_notify_request, req);
378 *id = ubus_find_notify_id(nreq, peer);
381 } else if (peer != req->peer)
389 static void ubus_process_notify_status(struct ubus_request *req, int id, struct ubus_msghdr *hdr)
391 struct ubus_notify_request *nreq;
392 struct blob_attr **tb;
393 struct blob_attr *cur;
397 nreq = container_of(req, struct ubus_notify_request, req);
398 nreq->pending &= ~(1 << id);
401 /* first id: ubusd's status message with a list of ids */
402 tb = ubus_parse_msg(hdr->data);
403 if (tb[UBUS_ATTR_SUBSCRIBERS]) {
404 blob_for_each_attr(cur, tb[UBUS_ATTR_SUBSCRIBERS], rem) {
405 if (!blob_check_type(blob_data(cur), blob_len(cur), BLOB_ATTR_INT32))
408 nreq->pending |= (1 << idx);
409 nreq->id[idx] = blob_get_int32(cur);
412 if (idx == UBUS_MAX_NOTIFY_PEERS + 1)
417 ubus_get_status(hdr, &ret);
419 nreq->status_cb(nreq, id, ret);
423 ubus_set_req_status(req, 0);
426 void __hidden ubus_process_req_msg(struct ubus_context *ctx, struct ubus_msghdr *hdr)
428 struct ubus_request *req;
432 case UBUS_MSG_STATUS:
433 req = ubus_find_request(ctx, hdr->seq, hdr->peer, &id);
438 ubus_process_notify_status(req, id, hdr);
440 ubus_process_req_status(req, hdr);
444 req = ubus_find_request(ctx, hdr->seq, hdr->peer, &id);
445 if (req && (req->data_cb || req->raw_data_cb))
446 ubus_process_req_data(req, hdr);