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;
125 req->ctx->cancel_poll = true;
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) {
155 timeout = time_end - get_time_msec();
157 ubus_set_req_status(req, UBUS_STATUS_TIMEOUT);
162 ubus_poll_data(ctx, (unsigned int) timeout);
165 ubus_set_req_status(req, UBUS_STATUS_CONNECTION_FAILED);
166 ctx->cancel_poll = true;
172 if (ctx->stack_depth)
173 ctx->cancel_poll = true;
176 status = req->status_code;
178 req->complete_cb = complete_cb;
179 if (req->complete_cb)
180 req->complete_cb(req, status);
182 if (!ctx->stack_depth && !ctx->sock.registered)
183 ctx->pending_timer.cb(&ctx->pending_timer);
188 void ubus_complete_deferred_request(struct ubus_context *ctx, struct ubus_request_data *req, int ret)
190 blob_buf_init(&b, 0);
191 blob_put_int32(&b, UBUS_ATTR_STATUS, ret);
192 blob_put_int32(&b, UBUS_ATTR_OBJID, req->object);
193 ubus_send_msg(ctx, req->seq, b.head, UBUS_MSG_STATUS, req->peer, req->fd);
196 int ubus_send_reply(struct ubus_context *ctx, struct ubus_request_data *req,
197 struct blob_attr *msg)
201 blob_buf_init(&b, 0);
202 blob_put_int32(&b, UBUS_ATTR_OBJID, req->object);
203 blob_put(&b, UBUS_ATTR_DATA, blob_data(msg), blob_len(msg));
204 ret = ubus_send_msg(ctx, req->seq, b.head, UBUS_MSG_DATA, req->peer, -1);
206 return UBUS_STATUS_NO_DATA;
211 int ubus_invoke_async_fd(struct ubus_context *ctx, uint32_t obj,
212 const char *method, struct blob_attr *msg,
213 struct ubus_request *req, int fd)
215 blob_buf_init(&b, 0);
216 blob_put_int32(&b, UBUS_ATTR_OBJID, obj);
217 blob_put_string(&b, UBUS_ATTR_METHOD, method);
219 blob_put(&b, UBUS_ATTR_DATA, blob_data(msg), blob_len(msg));
221 memset(req, 0, sizeof(*req));
223 if (__ubus_start_request(ctx, req, b.head, UBUS_MSG_INVOKE, obj) < 0)
224 return UBUS_STATUS_INVALID_ARGUMENT;
228 int ubus_invoke_fd(struct ubus_context *ctx, uint32_t obj, const char *method,
229 struct blob_attr *msg, ubus_data_handler_t cb, void *priv,
232 struct ubus_request req;
235 rc = ubus_invoke_async_fd(ctx, obj, method, msg, &req, fd);
241 return ubus_complete_request(ctx, &req, timeout);
245 ubus_notify_complete_cb(struct ubus_request *req, int ret)
247 struct ubus_notify_request *nreq;
249 nreq = container_of(req, struct ubus_notify_request, req);
250 if (!nreq->complete_cb)
253 nreq->complete_cb(nreq, 0, 0);
257 __ubus_notify_async(struct ubus_context *ctx, struct ubus_object *obj,
258 const char *type, struct blob_attr *msg,
259 struct ubus_notify_request *req, bool reply)
261 memset(req, 0, sizeof(*req));
263 blob_buf_init(&b, 0);
264 blob_put_int32(&b, UBUS_ATTR_OBJID, obj->id);
265 blob_put_string(&b, UBUS_ATTR_METHOD, type);
268 blob_put_int8(&b, UBUS_ATTR_NO_REPLY, true);
271 blob_put(&b, UBUS_ATTR_DATA, blob_data(msg), blob_len(msg));
273 if (ubus_start_request(ctx, &req->req, b.head, UBUS_MSG_NOTIFY, obj->id) < 0)
274 return UBUS_STATUS_INVALID_ARGUMENT;
276 /* wait for status message from ubusd first */
277 req->req.notify = true;
279 req->id[0] = obj->id;
280 req->req.complete_cb = ubus_notify_complete_cb;
285 int ubus_notify_async(struct ubus_context *ctx, struct ubus_object *obj,
286 const char *type, struct blob_attr *msg,
287 struct ubus_notify_request *req)
289 return __ubus_notify_async(ctx, obj, type, msg, req, true);
292 int ubus_notify(struct ubus_context *ctx, struct ubus_object *obj,
293 const char *type, struct blob_attr *msg, int timeout)
295 struct ubus_notify_request req;
298 ret = __ubus_notify_async(ctx, obj, type, msg, &req, timeout >= 0);
303 ubus_abort_request(ctx, &req.req);
307 return ubus_complete_request(ctx, &req.req, timeout);
310 static bool ubus_get_status(struct ubus_msghdr_buf *buf, int *ret)
312 struct blob_attr **attrbuf = ubus_parse_msg(buf->data);
314 if (!attrbuf[UBUS_ATTR_STATUS])
317 *ret = blob_get_u32(attrbuf[UBUS_ATTR_STATUS]);
322 ubus_process_req_status(struct ubus_request *req, struct ubus_msghdr_buf *buf)
324 int ret = UBUS_STATUS_INVALID_ARGUMENT;
326 ubus_get_status(buf, &ret);
327 req->peer = buf->hdr.peer;
328 ubus_set_req_status(req, ret);
334 ubus_process_req_data(struct ubus_request *req, struct ubus_msghdr_buf *buf)
336 struct ubus_pending_data *data;
341 req_data_cb(req, buf->hdr.type, buf->data);
342 __ubus_process_req_data(req);
343 req->blocked = false;
346 ubus_req_complete_cb(req);
351 len = blob_raw_len(buf->data);
352 data = calloc(1, sizeof(*data) + len);
356 data->type = buf->hdr.type;
357 memcpy(data->data, buf->data, len);
358 list_add(&data->list, &req->pending);
362 ubus_find_notify_id(struct ubus_notify_request *n, uint32_t objid)
364 uint32_t pending = n->pending;
367 for (i = 0; pending; i++, pending >>= 1) {
371 if (n->id[i] == objid)
378 static struct ubus_request *
379 ubus_find_request(struct ubus_context *ctx, uint32_t seq, uint32_t peer, int *id)
381 struct ubus_request *req;
383 list_for_each_entry(req, &ctx->requests, list) {
384 struct ubus_notify_request *nreq;
385 nreq = container_of(req, struct ubus_notify_request, req);
394 *id = ubus_find_notify_id(nreq, peer);
397 } else if (peer != req->peer)
405 static void ubus_process_notify_status(struct ubus_request *req, int id, struct ubus_msghdr_buf *buf)
407 struct ubus_notify_request *nreq;
408 struct blob_attr **tb;
409 struct blob_attr *cur;
413 nreq = container_of(req, struct ubus_notify_request, req);
414 nreq->pending &= ~(1 << id);
417 /* first id: ubusd's status message with a list of ids */
418 tb = ubus_parse_msg(buf->data);
419 if (tb[UBUS_ATTR_SUBSCRIBERS]) {
420 blob_for_each_attr(cur, tb[UBUS_ATTR_SUBSCRIBERS], rem) {
421 if (!blob_check_type(blob_data(cur), blob_len(cur), BLOB_ATTR_INT32))
424 nreq->pending |= (1 << idx);
425 nreq->id[idx] = blob_get_int32(cur);
428 if (idx == UBUS_MAX_NOTIFY_PEERS + 1)
433 ubus_get_status(buf, &ret);
435 nreq->status_cb(nreq, id, ret);
439 ubus_set_req_status(req, 0);
442 void __hidden ubus_process_req_msg(struct ubus_context *ctx, struct ubus_msghdr_buf *buf, int fd)
444 struct ubus_msghdr *hdr = &buf->hdr;
445 struct ubus_request *req;
449 case UBUS_MSG_STATUS:
450 req = ubus_find_request(ctx, hdr->seq, hdr->peer, &id);
462 ubus_process_notify_status(req, id, buf);
464 ubus_process_req_status(req, buf);
468 req = ubus_find_request(ctx, hdr->seq, hdr->peer, &id);
469 if (req && (req->data_cb || req->raw_data_cb))
470 ubus_process_req_data(req, buf);
475 int __ubus_monitor(struct ubus_context *ctx, const char *type)
477 blob_buf_init(&b, 0);
478 return ubus_invoke(ctx, UBUS_SYSTEM_OBJECT_MONITOR, type, b.head, NULL, NULL, 1000);