2 * Copyright (C) 2011 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>
16 #include <sys/socket.h>
21 #include <libubox/blob.h>
22 #include <libubox/blobmsg.h>
23 #include <libubox/usock.h>
28 #define STATIC_IOV(_var) { .iov_base = (char *) &(_var), .iov_len = sizeof(_var) }
30 const char *__ubus_strerror[__UBUS_STATUS_LAST] = {
31 [UBUS_STATUS_OK] = "Success",
32 [UBUS_STATUS_INVALID_COMMAND] = "Invalid command",
33 [UBUS_STATUS_INVALID_ARGUMENT] = "Invalid argument",
34 [UBUS_STATUS_METHOD_NOT_FOUND] = "Method not found",
35 [UBUS_STATUS_NOT_FOUND] = "Not found",
36 [UBUS_STATUS_NO_DATA] = "No response",
37 [UBUS_STATUS_PERMISSION_DENIED] = "Permission denied",
38 [UBUS_STATUS_TIMEOUT] = "Request timed out",
39 [UBUS_STATUS_NOT_SUPPORTED] = "Operation not supported",
40 [UBUS_STATUS_UNKNOWN_ERROR] = "Unknown error",
43 static struct blob_buf b;
45 static const struct blob_attr_info ubus_policy[UBUS_ATTR_MAX] = {
46 [UBUS_ATTR_STATUS] = { .type = BLOB_ATTR_INT32 },
47 [UBUS_ATTR_OBJID] = { .type = BLOB_ATTR_INT32 },
48 [UBUS_ATTR_OBJPATH] = { .type = BLOB_ATTR_STRING },
49 [UBUS_ATTR_METHOD] = { .type = BLOB_ATTR_STRING },
51 static struct blob_attr *attrbuf[UBUS_ATTR_MAX];
53 struct ubus_pending_data {
54 struct list_head list;
56 struct blob_attr data[];
59 struct ubus_pending_invoke {
60 struct list_head list;
61 struct ubus_msghdr hdr;
64 static void ubus_process_pending_invoke(struct ubus_context *ctx);
66 static int ubus_cmp_id(const void *k1, const void *k2, void *ptr)
68 const uint32_t *id1 = k1, *id2 = k2;
76 static struct blob_attr **ubus_parse_msg(struct blob_attr *msg)
78 blob_parse(msg, attrbuf, ubus_policy, UBUS_ATTR_MAX);
82 const char *ubus_strerror(int error)
86 if (error < 0 || error >= __UBUS_STATUS_LAST)
89 if (!__ubus_strerror[error])
92 return __ubus_strerror[error];
95 sprintf(err, "Unknown error: %d", error);
99 static void wait_data(int fd, bool write)
101 struct pollfd pfd = { .fd = fd };
103 pfd.events = write ? POLLOUT : POLLIN;
107 static int writev_retry(int fd, struct iovec *iov, int iov_len)
112 int cur_len = writev(fd, iov, iov_len);
126 while (cur_len >= iov->iov_len) {
127 cur_len -= iov->iov_len;
130 if (!cur_len || !iov_len)
133 iov->iov_len -= cur_len;
137 static int ubus_send_msg(struct ubus_context *ctx, uint32_t seq,
138 struct blob_attr *msg, int cmd, uint32_t peer)
140 struct ubus_msghdr hdr;
141 struct iovec iov[2] = {
151 blob_buf_init(&b, 0);
155 iov[1].iov_base = (char *) msg;
156 iov[1].iov_len = blob_raw_len(msg);
158 return writev_retry(ctx->sock.fd, iov, ARRAY_SIZE(iov));
161 static int ubus_start_request(struct ubus_context *ctx, struct ubus_request *req,
162 struct blob_attr *msg, int cmd, uint32_t peer)
164 memset(req, 0, sizeof(*req));
166 if (msg && blob_pad_len(msg) > UBUS_MAX_MSGLEN)
169 INIT_LIST_HEAD(&req->list);
170 INIT_LIST_HEAD(&req->pending);
173 req->seq = ++ctx->request_seq;
174 return ubus_send_msg(ctx, req->seq, msg, cmd, peer);
177 static bool recv_retry(int fd, struct iovec *iov, bool wait)
181 while (iov->iov_len > 0) {
183 wait_data(fd, false);
185 bytes = read(fd, iov->iov_base, iov->iov_len);
200 iov->iov_len -= bytes;
201 iov->iov_base += bytes;
207 static bool ubus_validate_hdr(struct ubus_msghdr *hdr)
209 if (hdr->version != 0)
212 if (blob_raw_len(hdr->data) < sizeof(*hdr->data))
215 if (blob_pad_len(hdr->data) > UBUS_MAX_MSGLEN)
221 static bool get_next_msg(struct ubus_context *ctx)
223 struct iovec iov = STATIC_IOV(ctx->msgbuf.hdr);
225 /* receive header + start attribute */
226 iov.iov_len += sizeof(struct blob_attr);
227 if (!recv_retry(ctx->sock.fd, &iov, false))
230 iov.iov_len = blob_len(ctx->msgbuf.hdr.data);
231 if (iov.iov_len > 0 && !recv_retry(ctx->sock.fd, &iov, true))
234 return ubus_validate_hdr(&ctx->msgbuf.hdr);
237 static bool ubus_get_status(struct ubus_msghdr *hdr, int *ret)
239 ubus_parse_msg(hdr->data);
241 if (!attrbuf[UBUS_ATTR_STATUS])
244 *ret = blob_get_u32(attrbuf[UBUS_ATTR_STATUS]);
248 static void req_data_cb(struct ubus_request *req, int type, struct blob_attr *data)
250 struct blob_attr **attr;
252 if (req->raw_data_cb)
253 req->raw_data_cb(req, type, data);
258 attr = ubus_parse_msg(data);
259 req->data_cb(req, type, attr[UBUS_ATTR_DATA]);
262 static void ubus_process_req_data(struct ubus_request *req)
264 struct ubus_pending_data *data;
266 while (!list_empty(&req->pending)) {
267 data = list_first_entry(&req->pending,
268 struct ubus_pending_data, list);
269 list_del(&data->list);
271 req_data_cb(req, data->type, data->data);
276 static void ubus_req_complete_cb(struct ubus_request *req)
278 ubus_complete_handler_t cb = req->complete_cb;
283 req->complete_cb = NULL;
284 cb(req, req->status_code);
287 static int ubus_process_req_status(struct ubus_request *req, struct ubus_msghdr *hdr)
289 int ret = UBUS_STATUS_INVALID_ARGUMENT;
291 if (!list_empty(&req->list))
292 list_del_init(&req->list);
294 ubus_get_status(hdr, &ret);
295 req->peer = hdr->peer;
296 req->status_msg = true;
297 req->status_code = ret;
299 ubus_req_complete_cb(req);
304 static void ubus_req_data(struct ubus_request *req, struct ubus_msghdr *hdr)
306 struct ubus_pending_data *data;
311 req_data_cb(req, hdr->type, hdr->data);
312 ubus_process_req_data(req);
313 req->blocked = false;
316 ubus_req_complete_cb(req);
321 len = blob_raw_len(hdr->data);
322 data = calloc(1, sizeof(*data) + len);
326 data->type = hdr->type;
327 memcpy(data->data, hdr->data, len);
328 list_add(&data->list, &req->pending);
331 static struct ubus_request *ubus_find_request(struct ubus_context *ctx, uint32_t seq, uint32_t peer)
333 struct ubus_request *req;
335 list_for_each_entry(req, &ctx->requests, list) {
336 if (seq != req->seq || peer != req->peer)
344 static void ubus_process_invoke(struct ubus_context *ctx, struct ubus_msghdr *hdr)
346 struct ubus_request_data req;
347 struct ubus_object *obj;
352 req.peer = hdr->peer;
354 ubus_parse_msg(hdr->data);
356 if (!attrbuf[UBUS_ATTR_OBJID])
359 objid = blob_get_u32(attrbuf[UBUS_ATTR_OBJID]);
361 if (!attrbuf[UBUS_ATTR_METHOD]) {
362 ret = UBUS_STATUS_INVALID_ARGUMENT;
366 obj = avl_find_element(&ctx->objects, &objid, obj, avl);
368 ret = UBUS_STATUS_NOT_FOUND;
372 for (method = 0; method < obj->n_methods; method++)
373 if (!obj->methods[method].name ||
374 !strcmp(obj->methods[method].name,
375 blob_data(attrbuf[UBUS_ATTR_METHOD])))
379 ret = UBUS_STATUS_METHOD_NOT_FOUND;
384 ret = obj->methods[method].handler(ctx, obj, &req,
385 blob_data(attrbuf[UBUS_ATTR_METHOD]),
386 attrbuf[UBUS_ATTR_DATA]);
389 blob_buf_init(&b, 0);
390 blob_put_int32(&b, UBUS_ATTR_STATUS, ret);
391 blob_put_int32(&b, UBUS_ATTR_OBJID, objid);
392 ubus_send_msg(ctx, req.seq, b.head, UBUS_MSG_STATUS, req.peer);
395 static void ubus_process_msg(struct ubus_context *ctx, struct ubus_msghdr *hdr)
397 struct ubus_pending_invoke *pending;
398 struct ubus_request *req;
401 case UBUS_MSG_STATUS:
402 req = ubus_find_request(ctx, hdr->seq, hdr->peer);
406 ubus_process_req_status(req, hdr);
410 req = ubus_find_request(ctx, hdr->seq, hdr->peer);
411 if (req && (req->data_cb || req->raw_data_cb))
412 ubus_req_data(req, hdr);
415 case UBUS_MSG_INVOKE:
416 if (ctx->stack_depth > 2) {
417 pending = calloc(1, sizeof(*pending) +
418 blob_raw_len(hdr->data));
423 memcpy(&pending->hdr, hdr, sizeof(*hdr) +
424 blob_raw_len(hdr->data));
425 list_add(&pending->list, &ctx->pending);
427 ubus_process_invoke(ctx, hdr);
433 static void ubus_process_pending_invoke(struct ubus_context *ctx)
435 struct ubus_pending_invoke *pending, *tmp;
437 list_for_each_entry_safe(pending, tmp, &ctx->pending, list) {
438 list_del(&pending->list);
439 ubus_process_msg(ctx, &pending->hdr);
441 if (ctx->stack_depth > 2)
446 void ubus_abort_request(struct ubus_context *ctx, struct ubus_request *req)
448 if (!list_empty(&req->list))
451 req->cancelled = true;
452 ubus_process_req_data(req);
453 list_del_init(&req->list);
456 void ubus_complete_request_async(struct ubus_context *ctx, struct ubus_request *req)
458 if (!list_empty(&req->list))
461 list_add(&req->list, &ctx->requests);
464 static void ubus_handle_data(struct uloop_fd *u, unsigned int events)
466 struct ubus_context *ctx = container_of(u, struct ubus_context, sock);
467 struct ubus_msghdr *hdr = &ctx->msgbuf.hdr;
469 while (get_next_msg(ctx)) {
470 ubus_process_msg(ctx, hdr);
476 ctx->connection_lost(ctx);
479 static void ubus_sync_req_cb(struct ubus_request *req, int ret)
481 req->status_msg = true;
482 req->status_code = ret;
486 struct ubus_sync_req_cb {
487 struct uloop_timeout timeout;
488 struct ubus_request *req;
491 static void ubus_sync_req_timeout_cb(struct uloop_timeout *timeout)
493 struct ubus_sync_req_cb *cb;
495 cb = container_of(timeout, struct ubus_sync_req_cb, timeout);
496 ubus_sync_req_cb(cb->req, UBUS_STATUS_TIMEOUT);
499 int ubus_complete_request(struct ubus_context *ctx, struct ubus_request *req,
502 struct ubus_sync_req_cb cb;
503 ubus_complete_handler_t complete_cb = req->complete_cb;
504 bool registered = ctx->sock.registered;
505 int status = UBUS_STATUS_NO_DATA;
513 memset(&cb, 0, sizeof(cb));
515 cb.timeout.cb = ubus_sync_req_timeout_cb;
516 uloop_timeout_set(&cb.timeout, timeout);
519 ubus_complete_request_async(ctx, req);
520 req->complete_cb = ubus_sync_req_cb;
523 while (!req->status_msg) {
524 bool cancelled = uloop_cancelled;
525 uloop_cancelled = false;
527 uloop_cancelled = cancelled;
532 uloop_timeout_cancel(&cb.timeout);
535 status = req->status_code;
537 req->complete_cb = complete_cb;
538 if (req->complete_cb)
539 req->complete_cb(req, status);
542 uloop_fd_delete(&ctx->sock);
544 if (!ctx->stack_depth)
545 ubus_process_pending_invoke(ctx);
550 struct ubus_lookup_request {
551 struct ubus_request req;
552 ubus_lookup_handler_t cb;
555 static void ubus_lookup_cb(struct ubus_request *ureq, int type, struct blob_attr *msg)
557 struct ubus_lookup_request *req;
558 struct ubus_object_data obj;
559 struct blob_attr **attr;
561 req = container_of(ureq, struct ubus_lookup_request, req);
562 attr = ubus_parse_msg(msg);
564 if (!attr[UBUS_ATTR_OBJID] || !attr[UBUS_ATTR_OBJPATH] ||
565 !attr[UBUS_ATTR_OBJTYPE])
568 memset(&obj, 0, sizeof(obj));
569 obj.id = blob_get_u32(attr[UBUS_ATTR_OBJID]);
570 obj.path = blob_data(attr[UBUS_ATTR_OBJPATH]);
571 obj.type_id = blob_get_u32(attr[UBUS_ATTR_OBJTYPE]);
572 obj.signature = attr[UBUS_ATTR_SIGNATURE];
573 req->cb(ureq->ctx, &obj, ureq->priv);
576 int ubus_lookup(struct ubus_context *ctx, const char *path,
577 ubus_lookup_handler_t cb, void *priv)
579 struct ubus_lookup_request lookup;
581 blob_buf_init(&b, 0);
583 blob_put_string(&b, UBUS_ATTR_OBJPATH, path);
585 if (ubus_start_request(ctx, &lookup.req, b.head, UBUS_MSG_LOOKUP, 0) < 0)
586 return UBUS_STATUS_INVALID_ARGUMENT;
588 lookup.req.raw_data_cb = ubus_lookup_cb;
589 lookup.req.priv = priv;
591 return ubus_complete_request(ctx, &lookup.req, 0);
594 static void ubus_lookup_id_cb(struct ubus_request *req, int type, struct blob_attr *msg)
596 struct blob_attr **attr;
597 uint32_t *id = req->priv;
599 attr = ubus_parse_msg(msg);
601 if (!attr[UBUS_ATTR_OBJID])
604 *id = blob_get_u32(attr[UBUS_ATTR_OBJID]);
607 int ubus_lookup_id(struct ubus_context *ctx, const char *path, uint32_t *id)
609 struct ubus_request req;
611 blob_buf_init(&b, 0);
613 blob_put_string(&b, UBUS_ATTR_OBJPATH, path);
615 if (ubus_start_request(ctx, &req, b.head, UBUS_MSG_LOOKUP, 0) < 0)
616 return UBUS_STATUS_INVALID_ARGUMENT;
618 req.raw_data_cb = ubus_lookup_id_cb;
621 return ubus_complete_request(ctx, &req, 0);
624 int ubus_send_reply(struct ubus_context *ctx, struct ubus_request_data *req,
625 struct blob_attr *msg)
629 blob_buf_init(&b, 0);
630 blob_put_int32(&b, UBUS_ATTR_OBJID, req->object);
631 blob_put(&b, UBUS_ATTR_DATA, blob_data(msg), blob_len(msg));
632 ret = ubus_send_msg(ctx, req->seq, b.head, UBUS_MSG_DATA, req->peer);
634 return UBUS_STATUS_NO_DATA;
639 int ubus_invoke_async(struct ubus_context *ctx, uint32_t obj, const char *method,
640 struct blob_attr *msg, struct ubus_request *req)
642 blob_buf_init(&b, 0);
643 blob_put_int32(&b, UBUS_ATTR_OBJID, obj);
644 blob_put_string(&b, UBUS_ATTR_METHOD, method);
646 blob_put(&b, UBUS_ATTR_DATA, blob_data(msg), blob_len(msg));
648 if (ubus_start_request(ctx, req, b.head, UBUS_MSG_INVOKE, obj) < 0)
649 return UBUS_STATUS_INVALID_ARGUMENT;
654 int ubus_invoke(struct ubus_context *ctx, uint32_t obj, const char *method,
655 struct blob_attr *msg, ubus_data_handler_t cb, void *priv,
658 struct ubus_request req;
660 ubus_invoke_async(ctx, obj, method, msg, &req);
663 return ubus_complete_request(ctx, &req, timeout);
666 static void ubus_add_object_cb(struct ubus_request *req, int type, struct blob_attr *msg)
668 struct ubus_object *obj = req->priv;
672 if (!attrbuf[UBUS_ATTR_OBJID])
675 obj->id = blob_get_u32(attrbuf[UBUS_ATTR_OBJID]);
677 if (attrbuf[UBUS_ATTR_OBJTYPE])
678 obj->type->id = blob_get_u32(attrbuf[UBUS_ATTR_OBJTYPE]);
680 obj->avl.key = &obj->id;
681 avl_insert(&req->ctx->objects, &obj->avl);
684 static void ubus_push_method_data(const struct ubus_method *m)
689 mtbl = blobmsg_open_table(&b, m->name);
691 for (i = 0; i < m->n_policy; i++)
692 blobmsg_add_u32(&b, m->policy[i].name, m->policy[i].type);
694 blobmsg_close_table(&b, mtbl);
697 static bool ubus_push_object_type(const struct ubus_object_type *type)
702 s = blob_nest_start(&b, UBUS_ATTR_SIGNATURE);
704 for (i = 0; i < type->n_methods; i++)
705 ubus_push_method_data(&type->methods[i]);
707 blob_nest_end(&b, s);
712 int ubus_add_object(struct ubus_context *ctx, struct ubus_object *obj)
714 struct ubus_request req;
717 blob_buf_init(&b, 0);
719 if (obj->name && obj->type) {
720 blob_put_string(&b, UBUS_ATTR_OBJPATH, obj->name);
723 blob_put_int32(&b, UBUS_ATTR_OBJTYPE, obj->type->id);
724 else if (!ubus_push_object_type(obj->type))
725 return UBUS_STATUS_INVALID_ARGUMENT;
728 if (ubus_start_request(ctx, &req, b.head, UBUS_MSG_ADD_OBJECT, 0) < 0)
729 return UBUS_STATUS_INVALID_ARGUMENT;
731 req.raw_data_cb = ubus_add_object_cb;
733 ret = ubus_complete_request(ctx, &req, 0);
738 return UBUS_STATUS_NO_DATA;
743 static void ubus_remove_object_cb(struct ubus_request *req, int type, struct blob_attr *msg)
745 struct ubus_object *obj = req->priv;
749 if (!attrbuf[UBUS_ATTR_OBJID])
754 if (attrbuf[UBUS_ATTR_OBJTYPE] && obj->type)
757 avl_delete(&req->ctx->objects, &obj->avl);
760 int ubus_remove_object(struct ubus_context *ctx, struct ubus_object *obj)
762 struct ubus_request req;
765 blob_buf_init(&b, 0);
766 blob_put_int32(&b, UBUS_ATTR_OBJID, obj->id);
768 if (ubus_start_request(ctx, &req, b.head, UBUS_MSG_REMOVE_OBJECT, 0) < 0)
769 return UBUS_STATUS_INVALID_ARGUMENT;
771 req.raw_data_cb = ubus_remove_object_cb;
773 ret = ubus_complete_request(ctx, &req, 0);
778 return UBUS_STATUS_NO_DATA;
783 static int ubus_event_cb(struct ubus_context *ctx, struct ubus_object *obj,
784 struct ubus_request_data *req,
785 const char *method, struct blob_attr *msg)
787 struct ubus_event_handler *ev;
789 ev = container_of(obj, struct ubus_event_handler, obj);
790 ev->cb(ctx, ev, method, msg);
794 static const struct ubus_method event_method = {
796 .handler = ubus_event_cb,
799 int ubus_register_event_handler(struct ubus_context *ctx,
800 struct ubus_event_handler *ev,
803 struct ubus_object *obj = &ev->obj;
808 obj->methods = &event_method;
811 if (!!obj->name ^ !!obj->type)
812 return UBUS_STATUS_INVALID_ARGUMENT;
814 ret = ubus_add_object(ctx, obj);
819 /* use a second buffer, ubus_invoke() overwrites the primary one */
820 memset(&b2, 0, sizeof(b2));
821 blob_buf_init(&b2, 0);
822 blobmsg_add_u32(&b2, "object", obj->id);
824 blobmsg_add_string(&b2, "pattern", pattern);
826 return ubus_invoke(ctx, UBUS_SYSTEM_OBJECT_EVENT, "register", b2.head,
836 static const struct blobmsg_policy watch_policy[] = {
837 [WATCH_ID] = { .name = "id", .type = BLOBMSG_TYPE_INT32 },
838 [WATCH_NOTIFY] = { .name = "notify", .type = BLOBMSG_TYPE_STRING },
842 static int ubus_watch_cb(struct ubus_context *ctx, struct ubus_object *obj,
843 struct ubus_request_data *req,
844 const char *method, struct blob_attr *msg)
846 struct ubus_watch_object *w;
847 struct blob_attr *tb[__WATCH_MAX];
849 blobmsg_parse(watch_policy, ARRAY_SIZE(watch_policy), tb, blob_data(msg), blob_len(msg));
851 if (!tb[WATCH_ID] || !tb[WATCH_NOTIFY])
852 return UBUS_STATUS_INVALID_ARGUMENT;
855 return UBUS_STATUS_INVALID_ARGUMENT;
857 w = container_of(obj, struct ubus_watch_object, obj);
858 w->cb(ctx, w, blobmsg_get_u32(tb[WATCH_ID]));
862 static const struct ubus_method watch_method = {
864 .handler = ubus_watch_cb,
867 int ubus_register_watch_object(struct ubus_context *ctx, struct ubus_watch_object *w_obj)
869 struct ubus_object *obj = &w_obj->obj;
871 obj->methods = &watch_method;
874 return ubus_add_object(ctx, obj);
878 __ubus_watch_request(struct ubus_context *ctx, struct ubus_object *obj, uint32_t id, const char *method, int type)
880 struct ubus_request req;
882 blob_buf_init(&b, 0);
883 blob_put_int32(&b, UBUS_ATTR_OBJID, obj->id);
884 blob_put_int32(&b, UBUS_ATTR_TARGET, id);
886 blob_put_string(&b, UBUS_ATTR_METHOD, method);
888 if (ubus_start_request(ctx, &req, b.head, type, 0) < 0)
889 return UBUS_STATUS_INVALID_ARGUMENT;
891 return ubus_complete_request(ctx, &req, 0);
895 int ubus_watch_object_add(struct ubus_context *ctx, struct ubus_watch_object *obj, uint32_t id)
897 return __ubus_watch_request(ctx, &obj->obj, id, "event", UBUS_MSG_ADD_WATCH);
900 int ubus_watch_object_remove(struct ubus_context *ctx, struct ubus_watch_object *obj, uint32_t id)
902 return __ubus_watch_request(ctx, &obj->obj, id, NULL, UBUS_MSG_REMOVE_WATCH);
905 int ubus_send_event(struct ubus_context *ctx, const char *id,
906 struct blob_attr *data)
908 struct ubus_request req;
911 blob_buf_init(&b, 0);
912 blob_put_int32(&b, UBUS_ATTR_OBJID, UBUS_SYSTEM_OBJECT_EVENT);
913 blob_put_string(&b, UBUS_ATTR_METHOD, "send");
914 s = blob_nest_start(&b, UBUS_ATTR_DATA);
915 blobmsg_add_string(&b, "id", id);
916 blobmsg_add_field(&b, BLOBMSG_TYPE_TABLE, "data", blob_data(data), blob_len(data));
917 blob_nest_end(&b, s);
919 if (ubus_start_request(ctx, &req, b.head, UBUS_MSG_INVOKE, UBUS_SYSTEM_OBJECT_EVENT) < 0)
920 return UBUS_STATUS_INVALID_ARGUMENT;
922 return ubus_complete_request(ctx, &req, 0);
925 static void ubus_default_connection_lost(struct ubus_context *ctx)
927 if (ctx->sock.registered)
931 struct ubus_context *ubus_connect(const char *path)
933 struct ubus_context *ctx;
935 struct ubus_msghdr hdr;
936 struct blob_attr data;
938 struct blob_attr *buf;
941 path = UBUS_UNIX_SOCKET;
943 ctx = calloc(1, sizeof(*ctx));
947 ctx->sock.fd = usock(USOCK_UNIX, path, NULL);
948 if (ctx->sock.fd < 0)
951 ctx->sock.cb = ubus_handle_data;
953 if (read(ctx->sock.fd, &hdr, sizeof(hdr)) != sizeof(hdr))
956 if (!ubus_validate_hdr(&hdr.hdr))
959 if (hdr.hdr.type != UBUS_MSG_HELLO)
962 buf = calloc(1, blob_raw_len(&hdr.data));
966 memcpy(buf, &hdr.data, sizeof(hdr.data));
967 if (read(ctx->sock.fd, blob_data(buf), blob_len(buf)) != blob_len(buf))
970 ctx->local_id = hdr.hdr.peer;
973 ctx->connection_lost = ubus_default_connection_lost;
975 INIT_LIST_HEAD(&ctx->requests);
976 INIT_LIST_HEAD(&ctx->pending);
977 avl_init(&ctx->objects, ubus_cmp_id, false, NULL);
982 fcntl(ctx->sock.fd, F_SETFL, fcntl(ctx->sock.fd, F_GETFL) | O_NONBLOCK);
996 void ubus_free(struct ubus_context *ctx)