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_tail(&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, fd);
108 case UBUS_MSG_MONITOR:
110 ctx->monitor_cb(ctx, buf->hdr.seq, buf->data);
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, *tmp;
120 list_for_each_entry_safe(pending, tmp, &ctx->pending, list) {
121 if (ctx->stack_depth)
124 list_del(&pending->list);
125 ubus_process_msg(ctx, &pending->hdr, -1);
130 struct ubus_lookup_request {
131 struct ubus_request req;
132 ubus_lookup_handler_t cb;
135 static void ubus_lookup_cb(struct ubus_request *ureq, int type, struct blob_attr *msg)
137 struct ubus_lookup_request *req;
138 struct ubus_object_data obj = {};
139 struct blob_attr **attr;
141 req = container_of(ureq, struct ubus_lookup_request, req);
142 attr = ubus_parse_msg(msg, blob_raw_len(msg));
144 if (!attr[UBUS_ATTR_OBJID] || !attr[UBUS_ATTR_OBJPATH] ||
145 !attr[UBUS_ATTR_OBJTYPE])
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, blob_raw_len(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;
224 struct blob_buf b2 = {};
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 blob_buf_init(&b2, 0);
241 blobmsg_add_u32(&b2, "object", obj->id);
243 blobmsg_add_string(&b2, "pattern", pattern);
245 ret = ubus_invoke(ctx, UBUS_SYSTEM_OBJECT_EVENT, "register", b2.head,
252 int ubus_send_event(struct ubus_context *ctx, const char *id,
253 struct blob_attr *data)
255 struct ubus_request req;
258 blob_buf_init(&b, 0);
259 blob_put_int32(&b, UBUS_ATTR_OBJID, UBUS_SYSTEM_OBJECT_EVENT);
260 blob_put_string(&b, UBUS_ATTR_METHOD, "send");
261 s = blob_nest_start(&b, UBUS_ATTR_DATA);
262 blobmsg_add_string(&b, "id", id);
263 blobmsg_add_field(&b, BLOBMSG_TYPE_TABLE, "data", blob_data(data), blob_len(data));
264 blob_nest_end(&b, s);
266 if (ubus_start_request(ctx, &req, b.head, UBUS_MSG_INVOKE, UBUS_SYSTEM_OBJECT_EVENT) < 0)
267 return UBUS_STATUS_INVALID_ARGUMENT;
269 return ubus_complete_request(ctx, &req, 0);
272 static void ubus_default_connection_lost(struct ubus_context *ctx)
274 if (ctx->sock.registered)
278 int ubus_connect_ctx(struct ubus_context *ctx, const char *path)
281 memset(ctx, 0, sizeof(*ctx));
284 ctx->sock.cb = ubus_handle_data;
285 ctx->connection_lost = ubus_default_connection_lost;
286 ctx->pending_timer.cb = ubus_process_pending_msg;
288 ctx->msgbuf.data = calloc(1, UBUS_MSG_CHUNK_SIZE);
289 if (!ctx->msgbuf.data)
291 ctx->msgbuf_data_len = UBUS_MSG_CHUNK_SIZE;
293 INIT_LIST_HEAD(&ctx->requests);
294 INIT_LIST_HEAD(&ctx->pending);
295 avl_init(&ctx->objects, ubus_cmp_id, false, NULL);
296 if (ubus_reconnect(ctx, path)) {
297 free(ctx->msgbuf.data);
298 ctx->msgbuf.data = NULL;
305 static void ubus_auto_reconnect_cb(struct uloop_timeout *timeout)
307 struct ubus_auto_conn *conn = container_of(timeout, struct ubus_auto_conn, timer);
309 if (!ubus_reconnect(&conn->ctx, conn->path))
310 ubus_add_uloop(&conn->ctx);
312 uloop_timeout_set(timeout, 1000);
315 static void ubus_auto_disconnect_cb(struct ubus_context *ctx)
317 struct ubus_auto_conn *conn = container_of(ctx, struct ubus_auto_conn, ctx);
319 conn->timer.cb = ubus_auto_reconnect_cb;
320 uloop_timeout_set(&conn->timer, 1000);
323 static void ubus_auto_connect_cb(struct uloop_timeout *timeout)
325 struct ubus_auto_conn *conn = container_of(timeout, struct ubus_auto_conn, timer);
327 if (ubus_connect_ctx(&conn->ctx, conn->path)) {
328 uloop_timeout_set(timeout, 1000);
329 fprintf(stderr, "failed to connect to ubus\n");
332 conn->ctx.connection_lost = ubus_auto_disconnect_cb;
334 conn->cb(&conn->ctx);
335 ubus_add_uloop(&conn->ctx);
338 void ubus_auto_connect(struct ubus_auto_conn *conn)
340 conn->timer.cb = ubus_auto_connect_cb;
341 ubus_auto_connect_cb(&conn->timer);
344 struct ubus_context *ubus_connect(const char *path)
346 struct ubus_context *ctx;
348 ctx = calloc(1, sizeof(*ctx));
352 if (ubus_connect_ctx(ctx, path)) {
360 void ubus_shutdown(struct ubus_context *ctx)
366 uloop_timeout_cancel(&ctx->pending_timer);
367 free(ctx->msgbuf.data);
370 void ubus_free(struct ubus_context *ctx)