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_buf *buf)
76 struct ubus_pending_msg *pending;
79 pending = calloc_a(sizeof(*pending), &data, blob_raw_len(buf->data));
81 pending->hdr.data = data;
82 memcpy(&pending->hdr.hdr, &buf->hdr, sizeof(buf->hdr));
83 memcpy(data, buf->data, blob_raw_len(buf->data));
84 list_add(&pending->list, &ctx->pending);
85 if (ctx->sock.registered)
86 uloop_timeout_set(&ctx->pending_timer, 1);
90 ubus_process_msg(struct ubus_context *ctx, struct ubus_msghdr_buf *buf, int fd)
92 switch(buf->hdr.type) {
95 ubus_process_req_msg(ctx, buf, fd);
99 case UBUS_MSG_UNSUBSCRIBE:
100 case UBUS_MSG_NOTIFY:
101 if (ctx->stack_depth) {
102 ubus_queue_msg(ctx, buf);
106 ubus_process_obj_msg(ctx, buf);
111 static void ubus_process_pending_msg(struct uloop_timeout *timeout)
113 struct ubus_context *ctx = container_of(timeout, struct ubus_context, pending_timer);
114 struct ubus_pending_msg *pending;
116 while (!ctx->stack_depth && !list_empty(&ctx->pending)) {
117 pending = list_first_entry(&ctx->pending, struct ubus_pending_msg, list);
118 list_del(&pending->list);
119 ubus_process_msg(ctx, &pending->hdr, -1);
124 struct ubus_lookup_request {
125 struct ubus_request req;
126 ubus_lookup_handler_t cb;
129 static void ubus_lookup_cb(struct ubus_request *ureq, int type, struct blob_attr *msg)
131 struct ubus_lookup_request *req;
132 struct ubus_object_data obj;
133 struct blob_attr **attr;
135 req = container_of(ureq, struct ubus_lookup_request, req);
136 attr = ubus_parse_msg(msg);
138 if (!attr[UBUS_ATTR_OBJID] || !attr[UBUS_ATTR_OBJPATH] ||
139 !attr[UBUS_ATTR_OBJTYPE])
142 memset(&obj, 0, sizeof(obj));
143 obj.id = blob_get_u32(attr[UBUS_ATTR_OBJID]);
144 obj.path = blob_data(attr[UBUS_ATTR_OBJPATH]);
145 obj.type_id = blob_get_u32(attr[UBUS_ATTR_OBJTYPE]);
146 obj.signature = attr[UBUS_ATTR_SIGNATURE];
147 req->cb(ureq->ctx, &obj, ureq->priv);
150 int ubus_lookup(struct ubus_context *ctx, const char *path,
151 ubus_lookup_handler_t cb, void *priv)
153 struct ubus_lookup_request lookup;
155 blob_buf_init(&b, 0);
157 blob_put_string(&b, UBUS_ATTR_OBJPATH, path);
159 if (ubus_start_request(ctx, &lookup.req, b.head, UBUS_MSG_LOOKUP, 0) < 0)
160 return UBUS_STATUS_INVALID_ARGUMENT;
162 lookup.req.raw_data_cb = ubus_lookup_cb;
163 lookup.req.priv = priv;
165 return ubus_complete_request(ctx, &lookup.req, 0);
168 static void ubus_lookup_id_cb(struct ubus_request *req, int type, struct blob_attr *msg)
170 struct blob_attr **attr;
171 uint32_t *id = req->priv;
173 attr = ubus_parse_msg(msg);
175 if (!attr[UBUS_ATTR_OBJID])
178 *id = blob_get_u32(attr[UBUS_ATTR_OBJID]);
181 int ubus_lookup_id(struct ubus_context *ctx, const char *path, uint32_t *id)
183 struct ubus_request req;
185 blob_buf_init(&b, 0);
187 blob_put_string(&b, UBUS_ATTR_OBJPATH, path);
189 if (ubus_start_request(ctx, &req, b.head, UBUS_MSG_LOOKUP, 0) < 0)
190 return UBUS_STATUS_INVALID_ARGUMENT;
192 req.raw_data_cb = ubus_lookup_id_cb;
195 return ubus_complete_request(ctx, &req, 0);
198 static int ubus_event_cb(struct ubus_context *ctx, struct ubus_object *obj,
199 struct ubus_request_data *req,
200 const char *method, struct blob_attr *msg)
202 struct ubus_event_handler *ev;
204 ev = container_of(obj, struct ubus_event_handler, obj);
205 ev->cb(ctx, ev, method, msg);
209 static const struct ubus_method event_method = {
211 .handler = ubus_event_cb,
214 int ubus_register_event_handler(struct ubus_context *ctx,
215 struct ubus_event_handler *ev,
218 struct ubus_object *obj = &ev->obj;
223 obj->methods = &event_method;
226 if (!!obj->name ^ !!obj->type)
227 return UBUS_STATUS_INVALID_ARGUMENT;
229 ret = ubus_add_object(ctx, obj);
234 /* use a second buffer, ubus_invoke() overwrites the primary one */
235 memset(&b2, 0, sizeof(b2));
236 blob_buf_init(&b2, 0);
237 blobmsg_add_u32(&b2, "object", obj->id);
239 blobmsg_add_string(&b2, "pattern", pattern);
241 ret = ubus_invoke(ctx, UBUS_SYSTEM_OBJECT_EVENT, "register", b2.head,
248 int ubus_send_event(struct ubus_context *ctx, const char *id,
249 struct blob_attr *data)
251 struct ubus_request req;
254 blob_buf_init(&b, 0);
255 blob_put_int32(&b, UBUS_ATTR_OBJID, UBUS_SYSTEM_OBJECT_EVENT);
256 blob_put_string(&b, UBUS_ATTR_METHOD, "send");
257 s = blob_nest_start(&b, UBUS_ATTR_DATA);
258 blobmsg_add_string(&b, "id", id);
259 blobmsg_add_field(&b, BLOBMSG_TYPE_TABLE, "data", blob_data(data), blob_len(data));
260 blob_nest_end(&b, s);
262 if (ubus_start_request(ctx, &req, b.head, UBUS_MSG_INVOKE, UBUS_SYSTEM_OBJECT_EVENT) < 0)
263 return UBUS_STATUS_INVALID_ARGUMENT;
265 return ubus_complete_request(ctx, &req, 0);
268 static void ubus_default_connection_lost(struct ubus_context *ctx)
270 if (ctx->sock.registered)
274 int ubus_connect_ctx(struct ubus_context *ctx, const char *path)
276 memset(ctx, 0, sizeof(*ctx));
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_MSG_CHUNK_SIZE, sizeof(char));
284 if (!ctx->msgbuf.data)
286 ctx->msgbuf_data_len = UBUS_MSG_CHUNK_SIZE;
288 INIT_LIST_HEAD(&ctx->requests);
289 INIT_LIST_HEAD(&ctx->pending);
290 avl_init(&ctx->objects, ubus_cmp_id, false, NULL);
291 if (ubus_reconnect(ctx, path)) {
292 free(ctx->msgbuf.data);
299 static void ubus_auto_reconnect_cb(struct uloop_timeout *timeout)
301 struct ubus_auto_conn *conn = container_of(timeout, struct ubus_auto_conn, timer);
303 if (!ubus_reconnect(&conn->ctx, conn->path))
304 ubus_add_uloop(&conn->ctx);
306 uloop_timeout_set(timeout, 1000);
309 static void ubus_auto_disconnect_cb(struct ubus_context *ctx)
311 struct ubus_auto_conn *conn = container_of(ctx, struct ubus_auto_conn, ctx);
313 conn->timer.cb = ubus_auto_reconnect_cb;
314 uloop_timeout_set(&conn->timer, 1000);
317 static void ubus_auto_connect_cb(struct uloop_timeout *timeout)
319 struct ubus_auto_conn *conn = container_of(timeout, struct ubus_auto_conn, timer);
321 if (ubus_connect_ctx(&conn->ctx, conn->path)) {
322 uloop_timeout_set(timeout, 1000);
323 fprintf(stderr, "failed to connect to ubus\n");
326 conn->ctx.connection_lost = ubus_auto_disconnect_cb;
328 conn->cb(&conn->ctx);
329 ubus_add_uloop(&conn->ctx);
332 void ubus_auto_connect(struct ubus_auto_conn *conn)
334 conn->timer.cb = ubus_auto_connect_cb;
335 ubus_auto_connect_cb(&conn->timer);
338 struct ubus_context *ubus_connect(const char *path)
340 struct ubus_context *ctx;
342 ctx = calloc(1, sizeof(*ctx));
346 if (ubus_connect_ctx(ctx, path)) {
354 void ubus_shutdown(struct ubus_context *ctx)
358 free(ctx->msgbuf.data);
361 void ubus_free(struct ubus_context *ctx)