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)
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;
65 return ubus_send_msg(ctx, req->seq, msg, cmd, peer, req->fd);
68 int __hidden ubus_start_request(struct ubus_context *ctx, struct ubus_request *req,
69 struct blob_attr *msg, int cmd, uint32_t peer)
71 memset(req, 0, sizeof(*req));
75 return __ubus_start_request(ctx, req, msg, cmd, peer);
79 void ubus_abort_request(struct ubus_context *ctx, struct ubus_request *req)
81 if (list_empty(&req->list))
84 req->cancelled = true;
85 __ubus_process_req_data(req);
86 list_del_init(&req->list);
89 void ubus_complete_request_async(struct ubus_context *ctx, struct ubus_request *req)
91 if (!list_empty(&req->list))
94 list_add(&req->list, &ctx->requests);
98 ubus_req_complete_cb(struct ubus_request *req)
100 ubus_complete_handler_t cb = req->complete_cb;
105 req->complete_cb = NULL;
106 cb(req, req->status_code);
110 ubus_set_req_status(struct ubus_request *req, int ret)
112 if (!list_empty(&req->list))
113 list_del_init(&req->list);
115 req->status_msg = true;
116 req->status_code = ret;
118 ubus_req_complete_cb(req);
121 static void ubus_sync_req_cb(struct ubus_request *req, int ret)
123 req->status_msg = true;
124 req->status_code = ret;
128 static int64_t get_time_msec(void)
133 clock_gettime(CLOCK_MONOTONIC, &ts);
134 val = (int64_t) ts.tv_sec * 1000LL;
135 val += ts.tv_nsec / 1000000LL;
139 int ubus_complete_request(struct ubus_context *ctx, struct ubus_request *req,
142 ubus_complete_handler_t complete_cb = req->complete_cb;
143 int status = UBUS_STATUS_NO_DATA;
144 int64_t timeout = 0, time_end = 0;
147 time_end = get_time_msec() + req_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;
156 uloop_cancelled = false;
158 timeout = time_end - get_time_msec();
160 ubus_set_req_status(req, UBUS_STATUS_TIMEOUT);
161 uloop_cancelled = cancelled;
165 ubus_poll_data(ctx, (unsigned int) timeout);
167 uloop_cancelled = cancelled;
169 ubus_set_req_status(req, UBUS_STATUS_CONNECTION_FAILED);
174 if (ctx->stack_depth)
175 uloop_cancelled = true;
178 status = req->status_code;
180 req->complete_cb = complete_cb;
181 if (req->complete_cb)
182 req->complete_cb(req, status);
184 if (!ctx->stack_depth && !ctx->sock.registered)
185 ctx->pending_timer.cb(&ctx->pending_timer);
190 void ubus_complete_deferred_request(struct ubus_context *ctx, struct ubus_request_data *req, int ret)
192 blob_buf_init(&b, 0);
193 blob_put_int32(&b, UBUS_ATTR_STATUS, ret);
194 blob_put_int32(&b, UBUS_ATTR_OBJID, req->object);
195 ubus_send_msg(ctx, req->seq, b.head, UBUS_MSG_STATUS, req->peer, req->fd);
198 int ubus_send_reply(struct ubus_context *ctx, struct ubus_request_data *req,
199 struct blob_attr *msg)
203 blob_buf_init(&b, 0);
204 blob_put_int32(&b, UBUS_ATTR_OBJID, req->object);
205 blob_put(&b, UBUS_ATTR_DATA, blob_data(msg), blob_len(msg));
206 ret = ubus_send_msg(ctx, req->seq, b.head, UBUS_MSG_DATA, req->peer, -1);
208 return UBUS_STATUS_NO_DATA;
213 int ubus_invoke_async_fd(struct ubus_context *ctx, uint32_t obj,
214 const char *method, struct blob_attr *msg,
215 struct ubus_request *req, int fd)
217 blob_buf_init(&b, 0);
218 blob_put_int32(&b, UBUS_ATTR_OBJID, obj);
219 blob_put_string(&b, UBUS_ATTR_METHOD, method);
221 blob_put(&b, UBUS_ATTR_DATA, blob_data(msg), blob_len(msg));
223 memset(req, 0, sizeof(*req));
225 if (__ubus_start_request(ctx, req, b.head, UBUS_MSG_INVOKE, obj) < 0)
226 return UBUS_STATUS_INVALID_ARGUMENT;
230 int ubus_invoke_fd(struct ubus_context *ctx, uint32_t obj, const char *method,
231 struct blob_attr *msg, ubus_data_handler_t cb, void *priv,
234 struct ubus_request req;
237 rc = ubus_invoke_async_fd(ctx, obj, method, msg, &req, fd);
243 return ubus_complete_request(ctx, &req, timeout);
247 ubus_notify_complete_cb(struct ubus_request *req, int ret)
249 struct ubus_notify_request *nreq;
251 nreq = container_of(req, struct ubus_notify_request, req);
252 if (!nreq->complete_cb)
255 nreq->complete_cb(nreq, 0, 0);
259 __ubus_notify_async(struct ubus_context *ctx, struct ubus_object *obj,
260 const char *type, struct blob_attr *msg,
261 struct ubus_notify_request *req, bool reply)
263 memset(req, 0, sizeof(*req));
265 blob_buf_init(&b, 0);
266 blob_put_int32(&b, UBUS_ATTR_OBJID, obj->id);
267 blob_put_string(&b, UBUS_ATTR_METHOD, type);
270 blob_put_int8(&b, UBUS_ATTR_NO_REPLY, true);
273 blob_put(&b, UBUS_ATTR_DATA, blob_data(msg), blob_len(msg));
275 if (ubus_start_request(ctx, &req->req, b.head, UBUS_MSG_NOTIFY, obj->id) < 0)
276 return UBUS_STATUS_INVALID_ARGUMENT;
278 /* wait for status message from ubusd first */
279 req->req.notify = true;
281 req->id[0] = obj->id;
282 req->req.complete_cb = ubus_notify_complete_cb;
287 int ubus_notify_async(struct ubus_context *ctx, struct ubus_object *obj,
288 const char *type, struct blob_attr *msg,
289 struct ubus_notify_request *req)
291 return __ubus_notify_async(ctx, obj, type, msg, req, true);
294 int ubus_notify(struct ubus_context *ctx, struct ubus_object *obj,
295 const char *type, struct blob_attr *msg, int timeout)
297 struct ubus_notify_request req;
300 ret = __ubus_notify_async(ctx, obj, type, msg, &req, timeout >= 0);
305 ubus_abort_request(ctx, &req.req);
309 return ubus_complete_request(ctx, &req.req, timeout);
312 static bool ubus_get_status(struct ubus_msghdr_buf *buf, int *ret)
314 struct blob_attr **attrbuf = ubus_parse_msg(buf->data);
316 if (!attrbuf[UBUS_ATTR_STATUS])
319 *ret = blob_get_u32(attrbuf[UBUS_ATTR_STATUS]);
324 ubus_process_req_status(struct ubus_request *req, struct ubus_msghdr_buf *buf)
326 int ret = UBUS_STATUS_INVALID_ARGUMENT;
328 ubus_get_status(buf, &ret);
329 req->peer = buf->hdr.peer;
330 ubus_set_req_status(req, ret);
336 ubus_process_req_data(struct ubus_request *req, struct ubus_msghdr_buf *buf)
338 struct ubus_pending_data *data;
343 req_data_cb(req, buf->hdr.type, buf->data);
344 __ubus_process_req_data(req);
345 req->blocked = false;
348 ubus_req_complete_cb(req);
353 len = blob_raw_len(buf->data);
354 data = calloc(1, sizeof(*data) + len);
358 data->type = buf->hdr.type;
359 memcpy(data->data, buf->data, len);
360 list_add(&data->list, &req->pending);
364 ubus_find_notify_id(struct ubus_notify_request *n, uint32_t objid)
366 uint32_t pending = n->pending;
369 for (i = 0; pending; i++, pending >>= 1) {
373 if (n->id[i] == objid)
380 static struct ubus_request *
381 ubus_find_request(struct ubus_context *ctx, uint32_t seq, uint32_t peer, int *id)
383 struct ubus_request *req;
385 list_for_each_entry(req, &ctx->requests, list) {
386 struct ubus_notify_request *nreq;
387 nreq = container_of(req, struct ubus_notify_request, req);
396 *id = ubus_find_notify_id(nreq, peer);
399 } else if (peer != req->peer)
407 static void ubus_process_notify_status(struct ubus_request *req, int id, struct ubus_msghdr_buf *buf)
409 struct ubus_notify_request *nreq;
410 struct blob_attr **tb;
411 struct blob_attr *cur;
415 nreq = container_of(req, struct ubus_notify_request, req);
416 nreq->pending &= ~(1 << id);
419 /* first id: ubusd's status message with a list of ids */
420 tb = ubus_parse_msg(buf->data);
421 if (tb[UBUS_ATTR_SUBSCRIBERS]) {
422 blob_for_each_attr(cur, tb[UBUS_ATTR_SUBSCRIBERS], rem) {
423 if (!blob_check_type(blob_data(cur), blob_len(cur), BLOB_ATTR_INT32))
426 nreq->pending |= (1 << idx);
427 nreq->id[idx] = blob_get_int32(cur);
430 if (idx == UBUS_MAX_NOTIFY_PEERS + 1)
435 ubus_get_status(buf, &ret);
437 nreq->status_cb(nreq, id, ret);
441 ubus_set_req_status(req, 0);
444 void __hidden ubus_process_req_msg(struct ubus_context *ctx, struct ubus_msghdr_buf *buf, int fd)
446 struct ubus_msghdr *hdr = &buf->hdr;
447 struct ubus_request *req;
451 case UBUS_MSG_STATUS:
452 req = ubus_find_request(ctx, hdr->seq, hdr->peer, &id);
464 ubus_process_notify_status(req, id, buf);
466 ubus_process_req_status(req, buf);
470 req = ubus_find_request(ctx, hdr->seq, hdr->peer, &id);
471 if (req && (req->data_cb || req->raw_data_cb))
472 ubus_process_req_data(req, buf);
477 int __ubus_monitor(struct ubus_context *ctx, const char *type)
479 blob_buf_init(&b, 0);
480 return ubus_invoke(ctx, UBUS_SYSTEM_OBJECT_MONITOR, type, b.head, NULL, NULL, 1000);