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, blob_raw_len(data));
35 if (!attr[UBUS_ATTR_DATA])
38 req->data_cb(req, type, attr[UBUS_ATTR_DATA]);
41 static void __ubus_process_req_data(struct ubus_request *req)
43 struct ubus_pending_data *data, *tmp;
45 list_for_each_entry_safe(data, tmp, &req->pending, list) {
46 list_del(&data->list);
48 req_data_cb(req, data->type, data->data);
53 int __hidden __ubus_start_request(struct ubus_context *ctx, struct ubus_request *req,
54 struct blob_attr *msg, int cmd, uint32_t peer)
57 if (msg && blob_pad_len(msg) > UBUS_MAX_MSGLEN)
60 INIT_LIST_HEAD(&req->list);
61 INIT_LIST_HEAD(&req->pending);
64 req->seq = ++ctx->request_seq;
66 return ubus_send_msg(ctx, req->seq, msg, cmd, peer, req->fd);
69 int __hidden ubus_start_request(struct ubus_context *ctx, struct ubus_request *req,
70 struct blob_attr *msg, int cmd, uint32_t peer)
72 memset(req, 0, sizeof(*req));
76 return __ubus_start_request(ctx, req, msg, cmd, peer);
80 void ubus_abort_request(struct ubus_context *ctx, struct ubus_request *req)
82 if (list_empty(&req->list))
85 req->cancelled = true;
86 __ubus_process_req_data(req);
87 list_del_init(&req->list);
90 void ubus_complete_request_async(struct ubus_context *ctx, struct ubus_request *req)
92 if (!list_empty(&req->list))
95 list_add(&req->list, &ctx->requests);
99 ubus_req_complete_cb(struct ubus_request *req)
101 ubus_complete_handler_t cb = req->complete_cb;
106 req->complete_cb = NULL;
107 cb(req, req->status_code);
111 ubus_set_req_status(struct ubus_request *req, int ret)
113 if (!list_empty(&req->list))
114 list_del_init(&req->list);
116 req->status_msg = true;
117 req->status_code = ret;
119 ubus_req_complete_cb(req);
122 static void ubus_sync_req_cb(struct ubus_request *req, int ret)
124 req->status_msg = true;
125 req->status_code = ret;
126 req->ctx->cancel_poll = true;
129 static int64_t get_time_msec(void)
134 clock_gettime(CLOCK_MONOTONIC, &ts);
135 val = (int64_t) ts.tv_sec * 1000LL;
136 val += ts.tv_nsec / 1000000LL;
140 int ubus_complete_request(struct ubus_context *ctx, struct ubus_request *req,
143 ubus_complete_handler_t complete_cb = req->complete_cb;
144 int status = UBUS_STATUS_NO_DATA;
145 int64_t timeout = 0, time_end = 0;
148 time_end = get_time_msec() + req_timeout;
150 ubus_complete_request_async(ctx, req);
151 req->complete_cb = ubus_sync_req_cb;
154 while (!req->status_msg) {
156 timeout = time_end - get_time_msec();
158 ubus_set_req_status(req, UBUS_STATUS_TIMEOUT);
163 ubus_poll_data(ctx, (unsigned int) timeout);
166 ubus_set_req_status(req, UBUS_STATUS_CONNECTION_FAILED);
167 ctx->cancel_poll = true;
173 if (ctx->stack_depth)
174 ctx->cancel_poll = true;
177 status = req->status_code;
179 req->complete_cb = complete_cb;
180 if (req->complete_cb)
181 req->complete_cb(req, status);
183 if (!ctx->stack_depth && !ctx->sock.registered)
184 ctx->pending_timer.cb(&ctx->pending_timer);
189 void ubus_complete_deferred_request(struct ubus_context *ctx, struct ubus_request_data *req, int ret)
191 blob_buf_init(&b, 0);
192 blob_put_int32(&b, UBUS_ATTR_STATUS, ret);
193 blob_put_int32(&b, UBUS_ATTR_OBJID, req->object);
194 ubus_send_msg(ctx, req->seq, b.head, UBUS_MSG_STATUS, req->peer, req->fd);
197 static void ubus_put_data(struct blob_buf *buf, struct blob_attr *msg)
200 blob_put(buf, UBUS_ATTR_DATA, blob_data(msg), blob_len(msg));
202 blob_put(buf, UBUS_ATTR_DATA, NULL, 0);
205 int ubus_send_reply(struct ubus_context *ctx, struct ubus_request_data *req,
206 struct blob_attr *msg)
210 blob_buf_init(&b, 0);
211 blob_put_int32(&b, UBUS_ATTR_OBJID, req->object);
212 ubus_put_data(&b, msg);
213 ret = ubus_send_msg(ctx, req->seq, b.head, UBUS_MSG_DATA, req->peer, -1);
215 return UBUS_STATUS_NO_DATA;
220 int ubus_invoke_async_fd(struct ubus_context *ctx, uint32_t obj,
221 const char *method, struct blob_attr *msg,
222 struct ubus_request *req, int fd)
224 blob_buf_init(&b, 0);
225 blob_put_int32(&b, UBUS_ATTR_OBJID, obj);
226 blob_put_string(&b, UBUS_ATTR_METHOD, method);
227 ubus_put_data(&b, msg);
229 memset(req, 0, sizeof(*req));
231 if (__ubus_start_request(ctx, req, b.head, UBUS_MSG_INVOKE, obj) < 0)
232 return UBUS_STATUS_INVALID_ARGUMENT;
236 int ubus_invoke_fd(struct ubus_context *ctx, uint32_t obj, const char *method,
237 struct blob_attr *msg, ubus_data_handler_t cb, void *priv,
240 struct ubus_request req;
243 rc = ubus_invoke_async_fd(ctx, obj, method, msg, &req, fd);
249 return ubus_complete_request(ctx, &req, timeout);
253 ubus_notify_complete_cb(struct ubus_request *req, int ret)
255 struct ubus_notify_request *nreq;
257 nreq = container_of(req, struct ubus_notify_request, req);
258 if (!nreq->complete_cb)
261 nreq->complete_cb(nreq, 0, 0);
265 ubus_notify_data_cb(struct ubus_request *req, int type, struct blob_attr *msg)
267 struct ubus_notify_request *nreq;
269 nreq = container_of(req, struct ubus_notify_request, req);
273 nreq->data_cb(nreq, type, msg);
277 __ubus_notify_async(struct ubus_context *ctx, struct ubus_object *obj,
278 const char *type, struct blob_attr *msg,
279 struct ubus_notify_request *req, bool reply)
281 memset(req, 0, sizeof(*req));
283 blob_buf_init(&b, 0);
284 blob_put_int32(&b, UBUS_ATTR_OBJID, obj->id);
285 blob_put_string(&b, UBUS_ATTR_METHOD, type);
286 ubus_put_data(&b, msg);
289 blob_put_int8(&b, UBUS_ATTR_NO_REPLY, true);
291 if (ubus_start_request(ctx, &req->req, b.head, UBUS_MSG_NOTIFY, obj->id) < 0)
292 return UBUS_STATUS_INVALID_ARGUMENT;
294 /* wait for status message from ubusd first */
295 req->req.notify = true;
297 req->id[0] = obj->id;
298 req->req.complete_cb = ubus_notify_complete_cb;
299 req->req.data_cb = ubus_notify_data_cb;
304 int ubus_notify_async(struct ubus_context *ctx, struct ubus_object *obj,
305 const char *type, struct blob_attr *msg,
306 struct ubus_notify_request *req)
308 return __ubus_notify_async(ctx, obj, type, msg, req, true);
311 int ubus_notify(struct ubus_context *ctx, struct ubus_object *obj,
312 const char *type, struct blob_attr *msg, int timeout)
314 struct ubus_notify_request req;
317 ret = __ubus_notify_async(ctx, obj, type, msg, &req, timeout >= 0);
322 ubus_abort_request(ctx, &req.req);
326 return ubus_complete_request(ctx, &req.req, timeout);
329 static bool ubus_get_status(struct ubus_msghdr_buf *buf, int *ret)
331 struct blob_attr **attrbuf = ubus_parse_msg(buf->data, blob_raw_len(buf->data));
333 if (!attrbuf[UBUS_ATTR_STATUS])
336 *ret = blob_get_u32(attrbuf[UBUS_ATTR_STATUS]);
341 ubus_process_req_status(struct ubus_request *req, struct ubus_msghdr_buf *buf)
343 int ret = UBUS_STATUS_INVALID_ARGUMENT;
345 ubus_get_status(buf, &ret);
346 req->peer = buf->hdr.peer;
347 ubus_set_req_status(req, ret);
353 ubus_process_req_data(struct ubus_request *req, struct ubus_msghdr_buf *buf)
355 struct ubus_pending_data *data;
360 req_data_cb(req, buf->hdr.type, buf->data);
361 __ubus_process_req_data(req);
362 req->blocked = false;
365 ubus_req_complete_cb(req);
370 len = blob_raw_len(buf->data);
371 data = calloc(1, sizeof(*data) + len);
375 data->type = buf->hdr.type;
376 memcpy(data->data, buf->data, len);
377 list_add(&data->list, &req->pending);
381 ubus_find_notify_id(struct ubus_notify_request *n, uint32_t objid)
383 uint32_t pending = n->pending;
386 for (i = 0; pending; i++, pending >>= 1) {
390 if (n->id[i] == objid)
397 static struct ubus_request *
398 ubus_find_request(struct ubus_context *ctx, uint32_t seq, uint32_t peer, int *id)
400 struct ubus_request *req;
402 list_for_each_entry(req, &ctx->requests, list) {
403 struct ubus_notify_request *nreq;
404 nreq = container_of(req, struct ubus_notify_request, req);
413 *id = ubus_find_notify_id(nreq, peer);
416 } else if (peer != req->peer)
424 static void ubus_process_notify_status(struct ubus_request *req, int id, struct ubus_msghdr_buf *buf)
426 struct ubus_notify_request *nreq;
427 struct blob_attr **tb;
428 struct blob_attr *cur;
433 nreq = container_of(req, struct ubus_notify_request, req);
434 nreq->pending &= ~(1 << id);
437 /* first id: ubusd's status message with a list of ids */
438 tb = ubus_parse_msg(buf->data, blob_raw_len(buf->data));
439 if (tb[UBUS_ATTR_SUBSCRIBERS]) {
440 blob_for_each_attr(cur, tb[UBUS_ATTR_SUBSCRIBERS], rem) {
441 if (!blob_check_type(blob_data(cur), blob_len(cur), BLOB_ATTR_INT32))
444 nreq->pending |= (1 << idx);
445 nreq->id[idx] = blob_get_int32(cur);
448 if (idx == UBUS_MAX_NOTIFY_PEERS + 1)
453 ubus_get_status(buf, &ret);
455 nreq->status_cb(nreq, id, ret);
459 ubus_set_req_status(req, 0);
462 void __hidden ubus_process_req_msg(struct ubus_context *ctx, struct ubus_msghdr_buf *buf, int fd)
464 struct ubus_msghdr *hdr = &buf->hdr;
465 struct ubus_request *req;
469 case UBUS_MSG_STATUS:
470 req = ubus_find_request(ctx, hdr->seq, hdr->peer, &id);
482 ubus_process_notify_status(req, id, buf);
484 ubus_process_req_status(req, buf);
488 req = ubus_find_request(ctx, hdr->seq, hdr->peer, &id);
489 if (req && (req->data_cb || req->raw_data_cb))
490 ubus_process_req_data(req, buf);
495 int __ubus_monitor(struct ubus_context *ctx, const char *type)
497 blob_buf_init(&b, 0);
498 return ubus_invoke(ctx, UBUS_SYSTEM_OBJECT_MONITOR, type, b.head, NULL, NULL, 1000);