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 void ubus_abort_request(struct ubus_context *ctx, struct ubus_request *req)
53 if (!list_empty(&req->list))
56 req->cancelled = true;
57 __ubus_process_req_data(req);
58 list_del_init(&req->list);
61 void ubus_complete_request_async(struct ubus_context *ctx, struct ubus_request *req)
63 if (!list_empty(&req->list))
66 list_add(&req->list, &ctx->requests);
69 static void ubus_sync_req_cb(struct ubus_request *req, int ret)
71 req->status_msg = true;
72 req->status_code = ret;
76 struct ubus_sync_req_cb {
77 struct uloop_timeout timeout;
78 struct ubus_request *req;
81 static void ubus_sync_req_timeout_cb(struct uloop_timeout *timeout)
83 struct ubus_sync_req_cb *cb;
85 cb = container_of(timeout, struct ubus_sync_req_cb, timeout);
86 ubus_sync_req_cb(cb->req, UBUS_STATUS_TIMEOUT);
89 int ubus_complete_request(struct ubus_context *ctx, struct ubus_request *req,
92 struct ubus_sync_req_cb cb;
93 ubus_complete_handler_t complete_cb = req->complete_cb;
94 bool registered = ctx->sock.registered;
95 int status = UBUS_STATUS_NO_DATA;
103 memset(&cb, 0, sizeof(cb));
105 cb.timeout.cb = ubus_sync_req_timeout_cb;
106 uloop_timeout_set(&cb.timeout, timeout);
109 ubus_complete_request_async(ctx, req);
110 req->complete_cb = ubus_sync_req_cb;
113 while (!req->status_msg) {
114 bool cancelled = uloop_cancelled;
115 uloop_cancelled = false;
117 uloop_cancelled = cancelled;
122 uloop_timeout_cancel(&cb.timeout);
125 status = req->status_code;
127 req->complete_cb = complete_cb;
128 if (req->complete_cb)
129 req->complete_cb(req, status);
132 uloop_fd_delete(&ctx->sock);
134 if (!ctx->stack_depth)
135 ubus_process_pending_msg(ctx);
140 void ubus_complete_deferred_request(struct ubus_context *ctx, struct ubus_request_data *req, int ret)
142 blob_buf_init(&b, 0);
143 blob_put_int32(&b, UBUS_ATTR_STATUS, ret);
144 blob_put_int32(&b, UBUS_ATTR_OBJID, req->object);
145 ubus_send_msg(ctx, req->seq, b.head, UBUS_MSG_STATUS, req->peer);
148 int ubus_send_reply(struct ubus_context *ctx, struct ubus_request_data *req,
149 struct blob_attr *msg)
153 blob_buf_init(&b, 0);
154 blob_put_int32(&b, UBUS_ATTR_OBJID, req->object);
155 blob_put(&b, UBUS_ATTR_DATA, blob_data(msg), blob_len(msg));
156 ret = ubus_send_msg(ctx, req->seq, b.head, UBUS_MSG_DATA, req->peer);
158 return UBUS_STATUS_NO_DATA;
163 int ubus_invoke_async(struct ubus_context *ctx, uint32_t obj, const char *method,
164 struct blob_attr *msg, struct ubus_request *req)
166 blob_buf_init(&b, 0);
167 blob_put_int32(&b, UBUS_ATTR_OBJID, obj);
168 blob_put_string(&b, UBUS_ATTR_METHOD, method);
170 blob_put(&b, UBUS_ATTR_DATA, blob_data(msg), blob_len(msg));
172 if (ubus_start_request(ctx, req, b.head, UBUS_MSG_INVOKE, obj) < 0)
173 return UBUS_STATUS_INVALID_ARGUMENT;
178 int ubus_invoke(struct ubus_context *ctx, uint32_t obj, const char *method,
179 struct blob_attr *msg, ubus_data_handler_t cb, void *priv,
182 struct ubus_request req;
184 ubus_invoke_async(ctx, obj, method, msg, &req);
187 return ubus_complete_request(ctx, &req, timeout);
190 static void ubus_req_complete_cb(struct ubus_request *req)
192 ubus_complete_handler_t cb = req->complete_cb;
197 req->complete_cb = NULL;
198 cb(req, req->status_code);
201 static bool ubus_get_status(struct ubus_msghdr *hdr, int *ret)
203 struct blob_attr **attrbuf = ubus_parse_msg(hdr->data);
205 if (!attrbuf[UBUS_ATTR_STATUS])
208 *ret = blob_get_u32(attrbuf[UBUS_ATTR_STATUS]);
213 ubus_process_req_status(struct ubus_request *req, struct ubus_msghdr *hdr)
215 int ret = UBUS_STATUS_INVALID_ARGUMENT;
217 if (!list_empty(&req->list))
218 list_del_init(&req->list);
220 ubus_get_status(hdr, &ret);
221 req->peer = hdr->peer;
222 req->status_msg = true;
223 req->status_code = ret;
225 ubus_req_complete_cb(req);
231 ubus_process_req_data(struct ubus_request *req, struct ubus_msghdr *hdr)
233 struct ubus_pending_data *data;
238 req_data_cb(req, hdr->type, hdr->data);
239 __ubus_process_req_data(req);
240 req->blocked = false;
243 ubus_req_complete_cb(req);
248 len = blob_raw_len(hdr->data);
249 data = calloc(1, sizeof(*data) + len);
253 data->type = hdr->type;
254 memcpy(data->data, hdr->data, len);
255 list_add(&data->list, &req->pending);
258 static struct ubus_request *
259 ubus_find_request(struct ubus_context *ctx, uint32_t seq, uint32_t peer)
261 struct ubus_request *req;
263 list_for_each_entry(req, &ctx->requests, list) {
264 if (seq != req->seq || peer != req->peer)
272 void __hidden ubus_process_req_msg(struct ubus_context *ctx, struct ubus_msghdr *hdr)
274 struct ubus_request *req;
277 case UBUS_MSG_STATUS:
278 req = ubus_find_request(ctx, hdr->seq, hdr->peer);
282 ubus_process_req_status(req, hdr);
286 req = ubus_find_request(ctx, hdr->seq, hdr->peer);
287 if (req && (req->data_cb || req->raw_data_cb))
288 ubus_process_req_data(req, hdr);