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.
14 #include <sys/types.h>
15 #include <sys/socket.h>
18 #include <libubox/blob.h>
19 #include <libubox/blobmsg.h>
22 #include "libubus-internal.h"
25 const char *__ubus_strerror[__UBUS_STATUS_LAST] = {
26 [UBUS_STATUS_OK] = "Success",
27 [UBUS_STATUS_INVALID_COMMAND] = "Invalid command",
28 [UBUS_STATUS_INVALID_ARGUMENT] = "Invalid argument",
29 [UBUS_STATUS_METHOD_NOT_FOUND] = "Method not found",
30 [UBUS_STATUS_NOT_FOUND] = "Not found",
31 [UBUS_STATUS_NO_DATA] = "No response",
32 [UBUS_STATUS_PERMISSION_DENIED] = "Permission denied",
33 [UBUS_STATUS_TIMEOUT] = "Request timed out",
34 [UBUS_STATUS_NOT_SUPPORTED] = "Operation not supported",
35 [UBUS_STATUS_UNKNOWN_ERROR] = "Unknown error",
36 [UBUS_STATUS_CONNECTION_FAILED] = "Connection failed",
39 struct blob_buf b __hidden = {};
41 struct ubus_pending_msg {
42 struct list_head list;
43 struct ubus_msghdr_buf hdr;
46 static int ubus_cmp_id(const void *k1, const void *k2, void *ptr)
48 const uint32_t *id1 = k1, *id2 = k2;
56 const char *ubus_strerror(int error)
60 if (error < 0 || error >= __UBUS_STATUS_LAST)
63 if (!__ubus_strerror[error])
66 return __ubus_strerror[error];
69 sprintf(err, "Unknown error: %d", error);
74 ubus_queue_msg(struct ubus_context *ctx, struct ubus_msghdr *hdr)
76 struct ubus_pending_msg *pending;
78 pending = calloc(1, sizeof(*pending));
81 pending->hdr.data = calloc(1, blob_raw_len(ubus_msghdr_data(hdr)));
82 if (!pending->hdr.data)
85 memcpy(&pending->hdr.hdr, hdr, sizeof(*hdr));
86 memcpy(pending->hdr.data, ubus_msghdr_data(hdr), blob_raw_len(ubus_msghdr_data(hdr)));
87 list_add(&pending->list, &ctx->pending);
88 if (ctx->sock.registered)
89 uloop_timeout_set(&ctx->pending_timer, 1);
93 ubus_process_msg(struct ubus_context *ctx, struct ubus_msghdr *hdr, int fd)
99 ubus_process_req_msg(ctx, hdr, fd);
102 case UBUS_MSG_INVOKE:
103 case UBUS_MSG_UNSUBSCRIBE:
104 case UBUS_MSG_NOTIFY:
105 if (ctx->stack_depth) {
106 ubus_queue_msg(ctx, hdr);
110 ubus_process_obj_msg(ctx, hdr);
115 static void ubus_process_pending_msg(struct uloop_timeout *timeout)
117 struct ubus_context *ctx = container_of(timeout, struct ubus_context, pending_timer);
118 struct ubus_pending_msg *pending;
120 while (!ctx->stack_depth && !list_empty(&ctx->pending)) {
121 pending = list_first_entry(&ctx->pending, struct ubus_pending_msg, list);
122 list_del(&pending->list);
123 ubus_process_msg(ctx, &pending->hdr.hdr, -1);
124 free(pending->hdr.data);
129 struct ubus_lookup_request {
130 struct ubus_request req;
131 ubus_lookup_handler_t cb;
134 static void ubus_lookup_cb(struct ubus_request *ureq, int type, struct blob_attr *msg)
136 struct ubus_lookup_request *req;
137 struct ubus_object_data obj;
138 struct blob_attr **attr;
140 req = container_of(ureq, struct ubus_lookup_request, req);
141 attr = ubus_parse_msg(msg);
143 if (!attr[UBUS_ATTR_OBJID] || !attr[UBUS_ATTR_OBJPATH] ||
144 !attr[UBUS_ATTR_OBJTYPE])
147 memset(&obj, 0, sizeof(obj));
148 obj.id = blob_get_u32(attr[UBUS_ATTR_OBJID]);
149 obj.path = blob_data(attr[UBUS_ATTR_OBJPATH]);
150 obj.type_id = blob_get_u32(attr[UBUS_ATTR_OBJTYPE]);
151 obj.signature = attr[UBUS_ATTR_SIGNATURE];
152 req->cb(ureq->ctx, &obj, ureq->priv);
155 int ubus_lookup(struct ubus_context *ctx, const char *path,
156 ubus_lookup_handler_t cb, void *priv)
158 struct ubus_lookup_request lookup;
160 blob_buf_init(&b, 0);
162 blob_put_string(&b, UBUS_ATTR_OBJPATH, path);
164 if (ubus_start_request(ctx, &lookup.req, b.head, UBUS_MSG_LOOKUP, 0) < 0)
165 return UBUS_STATUS_INVALID_ARGUMENT;
167 lookup.req.raw_data_cb = ubus_lookup_cb;
168 lookup.req.priv = priv;
170 return ubus_complete_request(ctx, &lookup.req, 0);
173 static void ubus_lookup_id_cb(struct ubus_request *req, int type, struct blob_attr *msg)
175 struct blob_attr **attr;
176 uint32_t *id = req->priv;
178 attr = ubus_parse_msg(msg);
180 if (!attr[UBUS_ATTR_OBJID])
183 *id = blob_get_u32(attr[UBUS_ATTR_OBJID]);
186 int ubus_lookup_id(struct ubus_context *ctx, const char *path, uint32_t *id)
188 struct ubus_request req;
190 blob_buf_init(&b, 0);
192 blob_put_string(&b, UBUS_ATTR_OBJPATH, path);
194 if (ubus_start_request(ctx, &req, b.head, UBUS_MSG_LOOKUP, 0) < 0)
195 return UBUS_STATUS_INVALID_ARGUMENT;
197 req.raw_data_cb = ubus_lookup_id_cb;
200 return ubus_complete_request(ctx, &req, 0);
203 static int ubus_event_cb(struct ubus_context *ctx, struct ubus_object *obj,
204 struct ubus_request_data *req,
205 const char *method, struct blob_attr *msg)
207 struct ubus_event_handler *ev;
209 ev = container_of(obj, struct ubus_event_handler, obj);
210 ev->cb(ctx, ev, method, msg);
214 static const struct ubus_method event_method = {
216 .handler = ubus_event_cb,
219 int ubus_register_event_handler(struct ubus_context *ctx,
220 struct ubus_event_handler *ev,
223 struct ubus_object *obj = &ev->obj;
228 obj->methods = &event_method;
231 if (!!obj->name ^ !!obj->type)
232 return UBUS_STATUS_INVALID_ARGUMENT;
234 ret = ubus_add_object(ctx, obj);
239 /* use a second buffer, ubus_invoke() overwrites the primary one */
240 memset(&b2, 0, sizeof(b2));
241 blob_buf_init(&b2, 0);
242 blobmsg_add_u32(&b2, "object", obj->id);
244 blobmsg_add_string(&b2, "pattern", pattern);
246 return ubus_invoke(ctx, UBUS_SYSTEM_OBJECT_EVENT, "register", b2.head,
250 int ubus_send_event(struct ubus_context *ctx, const char *id,
251 struct blob_attr *data)
253 struct ubus_request req;
256 blob_buf_init(&b, 0);
257 blob_put_int32(&b, UBUS_ATTR_OBJID, UBUS_SYSTEM_OBJECT_EVENT);
258 blob_put_string(&b, UBUS_ATTR_METHOD, "send");
259 s = blob_nest_start(&b, UBUS_ATTR_DATA);
260 blobmsg_add_string(&b, "id", id);
261 blobmsg_add_field(&b, BLOBMSG_TYPE_TABLE, "data", blob_data(data), blob_len(data));
262 blob_nest_end(&b, s);
264 if (ubus_start_request(ctx, &req, b.head, UBUS_MSG_INVOKE, UBUS_SYSTEM_OBJECT_EVENT) < 0)
265 return UBUS_STATUS_INVALID_ARGUMENT;
267 return ubus_complete_request(ctx, &req, 0);
270 static void ubus_default_connection_lost(struct ubus_context *ctx)
272 if (ctx->sock.registered)
276 static int _ubus_connect(struct ubus_context *ctx, const char *path)
279 ctx->sock.cb = ubus_handle_data;
280 ctx->connection_lost = ubus_default_connection_lost;
281 ctx->pending_timer.cb = ubus_process_pending_msg;
283 ctx->msgbuf.data = calloc(UBUS_MAX_MSGLEN, sizeof(char));
284 if (!ctx->msgbuf.data)
287 INIT_LIST_HEAD(&ctx->requests);
288 INIT_LIST_HEAD(&ctx->pending);
289 avl_init(&ctx->objects, ubus_cmp_id, false, NULL);
290 if (ubus_reconnect(ctx, path)) {
291 free(ctx->msgbuf.data);
298 static void ubus_auto_reconnect_cb(struct uloop_timeout *timeout)
300 struct ubus_auto_conn *conn = container_of(timeout, struct ubus_auto_conn, timer);
302 if (!ubus_reconnect(&conn->ctx, conn->path))
303 ubus_add_uloop(&conn->ctx);
305 uloop_timeout_set(timeout, 1000);
308 static void ubus_auto_disconnect_cb(struct ubus_context *ctx)
310 struct ubus_auto_conn *conn = container_of(ctx, struct ubus_auto_conn, ctx);
312 conn->timer.cb = ubus_auto_reconnect_cb;
313 uloop_timeout_set(&conn->timer, 1000);
316 static void ubus_auto_connect_cb(struct uloop_timeout *timeout)
318 struct ubus_auto_conn *conn = container_of(timeout, struct ubus_auto_conn, timer);
320 if (_ubus_connect(&conn->ctx, conn->path)) {
321 uloop_timeout_set(timeout, 1000);
322 fprintf(stderr, "failed to connect to ubus\n");
325 conn->ctx.connection_lost = ubus_auto_disconnect_cb;
327 conn->cb(&conn->ctx);
328 ubus_add_uloop(&conn->ctx);
331 void ubus_auto_connect(struct ubus_auto_conn *conn)
333 conn->timer.cb = ubus_auto_connect_cb;
334 ubus_auto_connect_cb(&conn->timer);
337 struct ubus_context *ubus_connect(const char *path)
339 struct ubus_context *ctx;
341 ctx = calloc(1, sizeof(*ctx));
345 if (_ubus_connect(ctx, path)) {
353 void ubus_free(struct ubus_context *ctx)
357 free(ctx->msgbuf.data);