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);
230 static bool ubus_get_status(struct ubus_msghdr *hdr, int *ret)
232 struct blob_attr **attrbuf = ubus_parse_msg(hdr->data);
234 if (!attrbuf[UBUS_ATTR_STATUS])
237 *ret = blob_get_u32(attrbuf[UBUS_ATTR_STATUS]);
242 ubus_process_req_status(struct ubus_request *req, struct ubus_msghdr *hdr)
244 int ret = UBUS_STATUS_INVALID_ARGUMENT;
246 ubus_get_status(hdr, &ret);
247 req->peer = hdr->peer;
248 ubus_set_req_status(req, ret);
254 ubus_process_req_data(struct ubus_request *req, struct ubus_msghdr *hdr)
256 struct ubus_pending_data *data;
261 req_data_cb(req, hdr->type, hdr->data);
262 __ubus_process_req_data(req);
263 req->blocked = false;
266 ubus_req_complete_cb(req);
271 len = blob_raw_len(hdr->data);
272 data = calloc(1, sizeof(*data) + len);
276 data->type = hdr->type;
277 memcpy(data->data, hdr->data, len);
278 list_add(&data->list, &req->pending);
281 static struct ubus_request *
282 ubus_find_request(struct ubus_context *ctx, uint32_t seq, uint32_t peer)
284 struct ubus_request *req;
286 list_for_each_entry(req, &ctx->requests, list) {
287 if (seq != req->seq || peer != req->peer)
295 void __hidden ubus_process_req_msg(struct ubus_context *ctx, struct ubus_msghdr *hdr)
297 struct ubus_request *req;
300 case UBUS_MSG_STATUS:
301 req = ubus_find_request(ctx, hdr->seq, hdr->peer);
305 ubus_process_req_status(req, hdr);
309 req = ubus_find_request(ctx, hdr->seq, hdr->peer);
310 if (req && (req->data_cb || req->raw_data_cb))
311 ubus_process_req_data(req, hdr);