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",
41 [UBUS_STATUS_CONNECTION_FAILED] = "Connection failed",
44 static struct blob_buf b;
46 static const struct blob_attr_info ubus_policy[UBUS_ATTR_MAX] = {
47 [UBUS_ATTR_STATUS] = { .type = BLOB_ATTR_INT32 },
48 [UBUS_ATTR_OBJID] = { .type = BLOB_ATTR_INT32 },
49 [UBUS_ATTR_OBJPATH] = { .type = BLOB_ATTR_STRING },
50 [UBUS_ATTR_METHOD] = { .type = BLOB_ATTR_STRING },
52 static struct blob_attr *attrbuf[UBUS_ATTR_MAX];
54 struct ubus_pending_data {
55 struct list_head list;
57 struct blob_attr data[];
60 struct ubus_pending_invoke {
61 struct list_head list;
62 struct ubus_msghdr hdr;
65 static void ubus_process_pending_invoke(struct ubus_context *ctx);
67 static int ubus_cmp_id(const void *k1, const void *k2, void *ptr)
69 const uint32_t *id1 = k1, *id2 = k2;
77 static struct blob_attr **ubus_parse_msg(struct blob_attr *msg)
79 blob_parse(msg, attrbuf, ubus_policy, UBUS_ATTR_MAX);
83 const char *ubus_strerror(int error)
87 if (error < 0 || error >= __UBUS_STATUS_LAST)
90 if (!__ubus_strerror[error])
93 return __ubus_strerror[error];
96 sprintf(err, "Unknown error: %d", error);
100 static void wait_data(int fd, bool write)
102 struct pollfd pfd = { .fd = fd };
104 pfd.events = write ? POLLOUT : POLLIN;
108 static int writev_retry(int fd, struct iovec *iov, int iov_len)
113 int cur_len = writev(fd, iov, iov_len);
127 while (cur_len >= iov->iov_len) {
128 cur_len -= iov->iov_len;
131 if (!cur_len || !iov_len)
134 iov->iov_len -= cur_len;
138 static int ubus_send_msg(struct ubus_context *ctx, uint32_t seq,
139 struct blob_attr *msg, int cmd, uint32_t peer)
141 struct ubus_msghdr hdr;
142 struct iovec iov[2] = {
152 blob_buf_init(&b, 0);
156 iov[1].iov_base = (char *) msg;
157 iov[1].iov_len = blob_raw_len(msg);
159 return writev_retry(ctx->sock.fd, iov, ARRAY_SIZE(iov));
162 static int ubus_start_request(struct ubus_context *ctx, struct ubus_request *req,
163 struct blob_attr *msg, int cmd, uint32_t peer)
165 memset(req, 0, sizeof(*req));
167 if (msg && blob_pad_len(msg) > UBUS_MAX_MSGLEN)
170 INIT_LIST_HEAD(&req->list);
171 INIT_LIST_HEAD(&req->pending);
174 req->seq = ++ctx->request_seq;
175 return ubus_send_msg(ctx, req->seq, msg, cmd, peer);
178 static bool recv_retry(int fd, struct iovec *iov, bool wait)
182 while (iov->iov_len > 0) {
184 wait_data(fd, false);
186 bytes = read(fd, iov->iov_base, iov->iov_len);
201 iov->iov_len -= bytes;
202 iov->iov_base += bytes;
208 static bool ubus_validate_hdr(struct ubus_msghdr *hdr)
210 if (hdr->version != 0)
213 if (blob_raw_len(hdr->data) < sizeof(*hdr->data))
216 if (blob_pad_len(hdr->data) > UBUS_MAX_MSGLEN)
222 static bool get_next_msg(struct ubus_context *ctx)
224 struct iovec iov = STATIC_IOV(ctx->msgbuf.hdr);
226 /* receive header + start attribute */
227 iov.iov_len += sizeof(struct blob_attr);
228 if (!recv_retry(ctx->sock.fd, &iov, false))
231 iov.iov_len = blob_len(ctx->msgbuf.hdr.data);
232 if (iov.iov_len > 0 && !recv_retry(ctx->sock.fd, &iov, true))
235 return ubus_validate_hdr(&ctx->msgbuf.hdr);
238 static bool ubus_get_status(struct ubus_msghdr *hdr, int *ret)
240 ubus_parse_msg(hdr->data);
242 if (!attrbuf[UBUS_ATTR_STATUS])
245 *ret = blob_get_u32(attrbuf[UBUS_ATTR_STATUS]);
249 static void req_data_cb(struct ubus_request *req, int type, struct blob_attr *data)
251 struct blob_attr **attr;
253 if (req->raw_data_cb)
254 req->raw_data_cb(req, type, data);
259 attr = ubus_parse_msg(data);
260 req->data_cb(req, type, attr[UBUS_ATTR_DATA]);
263 static void ubus_process_req_data(struct ubus_request *req)
265 struct ubus_pending_data *data;
267 while (!list_empty(&req->pending)) {
268 data = list_first_entry(&req->pending,
269 struct ubus_pending_data, list);
270 list_del(&data->list);
272 req_data_cb(req, data->type, data->data);
277 static void ubus_req_complete_cb(struct ubus_request *req)
279 ubus_complete_handler_t cb = req->complete_cb;
284 req->complete_cb = NULL;
285 cb(req, req->status_code);
288 static int ubus_process_req_status(struct ubus_request *req, struct ubus_msghdr *hdr)
290 int ret = UBUS_STATUS_INVALID_ARGUMENT;
292 if (!list_empty(&req->list))
293 list_del_init(&req->list);
295 ubus_get_status(hdr, &ret);
296 req->peer = hdr->peer;
297 req->status_msg = true;
298 req->status_code = ret;
300 ubus_req_complete_cb(req);
305 static void ubus_req_data(struct ubus_request *req, struct ubus_msghdr *hdr)
307 struct ubus_pending_data *data;
312 req_data_cb(req, hdr->type, hdr->data);
313 ubus_process_req_data(req);
314 req->blocked = false;
317 ubus_req_complete_cb(req);
322 len = blob_raw_len(hdr->data);
323 data = calloc(1, sizeof(*data) + len);
327 data->type = hdr->type;
328 memcpy(data->data, hdr->data, len);
329 list_add(&data->list, &req->pending);
332 static struct ubus_request *ubus_find_request(struct ubus_context *ctx, uint32_t seq, uint32_t peer)
334 struct ubus_request *req;
336 list_for_each_entry(req, &ctx->requests, list) {
337 if (seq != req->seq || peer != req->peer)
345 void ubus_complete_deferred_request(struct ubus_context *ctx, struct ubus_request_data *req, int ret)
347 blob_buf_init(&b, 0);
348 blob_put_int32(&b, UBUS_ATTR_STATUS, ret);
349 blob_put_int32(&b, UBUS_ATTR_OBJID, req->object);
350 ubus_send_msg(ctx, req->seq, b.head, UBUS_MSG_STATUS, req->peer);
353 static void ubus_process_invoke(struct ubus_context *ctx, struct ubus_msghdr *hdr)
355 struct ubus_request_data req;
356 struct ubus_object *obj;
360 req.peer = hdr->peer;
362 ubus_parse_msg(hdr->data);
364 if (!attrbuf[UBUS_ATTR_OBJID])
367 req.object = blob_get_u32(attrbuf[UBUS_ATTR_OBJID]);
369 if (!attrbuf[UBUS_ATTR_METHOD]) {
370 ret = UBUS_STATUS_INVALID_ARGUMENT;
374 obj = avl_find_element(&ctx->objects, &req.object, obj, avl);
376 ret = UBUS_STATUS_NOT_FOUND;
380 for (method = 0; method < obj->n_methods; method++)
381 if (!obj->methods[method].name ||
382 !strcmp(obj->methods[method].name,
383 blob_data(attrbuf[UBUS_ATTR_METHOD])))
387 ret = UBUS_STATUS_METHOD_NOT_FOUND;
391 ret = obj->methods[method].handler(ctx, obj, &req,
392 blob_data(attrbuf[UBUS_ATTR_METHOD]),
393 attrbuf[UBUS_ATTR_DATA]);
398 ubus_complete_deferred_request(ctx, &req, ret);
401 static void ubus_process_msg(struct ubus_context *ctx, struct ubus_msghdr *hdr)
403 struct ubus_pending_invoke *pending;
404 struct ubus_request *req;
407 case UBUS_MSG_STATUS:
408 req = ubus_find_request(ctx, hdr->seq, hdr->peer);
412 ubus_process_req_status(req, hdr);
416 req = ubus_find_request(ctx, hdr->seq, hdr->peer);
417 if (req && (req->data_cb || req->raw_data_cb))
418 ubus_req_data(req, hdr);
421 case UBUS_MSG_INVOKE:
422 if (ctx->stack_depth > 2) {
423 pending = calloc(1, sizeof(*pending) +
424 blob_raw_len(hdr->data));
429 memcpy(&pending->hdr, hdr, sizeof(*hdr) +
430 blob_raw_len(hdr->data));
431 list_add(&pending->list, &ctx->pending);
433 ubus_process_invoke(ctx, hdr);
439 static void ubus_process_pending_invoke(struct ubus_context *ctx)
441 struct ubus_pending_invoke *pending, *tmp;
443 list_for_each_entry_safe(pending, tmp, &ctx->pending, list) {
444 list_del(&pending->list);
445 ubus_process_msg(ctx, &pending->hdr);
447 if (ctx->stack_depth > 2)
452 void ubus_abort_request(struct ubus_context *ctx, struct ubus_request *req)
454 if (!list_empty(&req->list))
457 req->cancelled = true;
458 ubus_process_req_data(req);
459 list_del_init(&req->list);
462 void ubus_complete_request_async(struct ubus_context *ctx, struct ubus_request *req)
464 if (!list_empty(&req->list))
467 list_add(&req->list, &ctx->requests);
470 static void ubus_handle_data(struct uloop_fd *u, unsigned int events)
472 struct ubus_context *ctx = container_of(u, struct ubus_context, sock);
473 struct ubus_msghdr *hdr = &ctx->msgbuf.hdr;
475 while (get_next_msg(ctx)) {
476 ubus_process_msg(ctx, hdr);
482 ctx->connection_lost(ctx);
485 static void ubus_sync_req_cb(struct ubus_request *req, int ret)
487 req->status_msg = true;
488 req->status_code = ret;
492 struct ubus_sync_req_cb {
493 struct uloop_timeout timeout;
494 struct ubus_request *req;
497 static void ubus_sync_req_timeout_cb(struct uloop_timeout *timeout)
499 struct ubus_sync_req_cb *cb;
501 cb = container_of(timeout, struct ubus_sync_req_cb, timeout);
502 ubus_sync_req_cb(cb->req, UBUS_STATUS_TIMEOUT);
505 int ubus_complete_request(struct ubus_context *ctx, struct ubus_request *req,
508 struct ubus_sync_req_cb cb;
509 ubus_complete_handler_t complete_cb = req->complete_cb;
510 bool registered = ctx->sock.registered;
511 int status = UBUS_STATUS_NO_DATA;
519 memset(&cb, 0, sizeof(cb));
521 cb.timeout.cb = ubus_sync_req_timeout_cb;
522 uloop_timeout_set(&cb.timeout, timeout);
525 ubus_complete_request_async(ctx, req);
526 req->complete_cb = ubus_sync_req_cb;
529 while (!req->status_msg) {
530 bool cancelled = uloop_cancelled;
531 uloop_cancelled = false;
533 uloop_cancelled = cancelled;
538 uloop_timeout_cancel(&cb.timeout);
541 status = req->status_code;
543 req->complete_cb = complete_cb;
544 if (req->complete_cb)
545 req->complete_cb(req, status);
548 uloop_fd_delete(&ctx->sock);
550 if (!ctx->stack_depth)
551 ubus_process_pending_invoke(ctx);
556 struct ubus_lookup_request {
557 struct ubus_request req;
558 ubus_lookup_handler_t cb;
561 static void ubus_lookup_cb(struct ubus_request *ureq, int type, struct blob_attr *msg)
563 struct ubus_lookup_request *req;
564 struct ubus_object_data obj;
565 struct blob_attr **attr;
567 req = container_of(ureq, struct ubus_lookup_request, req);
568 attr = ubus_parse_msg(msg);
570 if (!attr[UBUS_ATTR_OBJID] || !attr[UBUS_ATTR_OBJPATH] ||
571 !attr[UBUS_ATTR_OBJTYPE])
574 memset(&obj, 0, sizeof(obj));
575 obj.id = blob_get_u32(attr[UBUS_ATTR_OBJID]);
576 obj.path = blob_data(attr[UBUS_ATTR_OBJPATH]);
577 obj.type_id = blob_get_u32(attr[UBUS_ATTR_OBJTYPE]);
578 obj.signature = attr[UBUS_ATTR_SIGNATURE];
579 req->cb(ureq->ctx, &obj, ureq->priv);
582 int ubus_lookup(struct ubus_context *ctx, const char *path,
583 ubus_lookup_handler_t cb, void *priv)
585 struct ubus_lookup_request lookup;
587 blob_buf_init(&b, 0);
589 blob_put_string(&b, UBUS_ATTR_OBJPATH, path);
591 if (ubus_start_request(ctx, &lookup.req, b.head, UBUS_MSG_LOOKUP, 0) < 0)
592 return UBUS_STATUS_INVALID_ARGUMENT;
594 lookup.req.raw_data_cb = ubus_lookup_cb;
595 lookup.req.priv = priv;
597 return ubus_complete_request(ctx, &lookup.req, 0);
600 static void ubus_lookup_id_cb(struct ubus_request *req, int type, struct blob_attr *msg)
602 struct blob_attr **attr;
603 uint32_t *id = req->priv;
605 attr = ubus_parse_msg(msg);
607 if (!attr[UBUS_ATTR_OBJID])
610 *id = blob_get_u32(attr[UBUS_ATTR_OBJID]);
613 int ubus_lookup_id(struct ubus_context *ctx, const char *path, uint32_t *id)
615 struct ubus_request req;
617 blob_buf_init(&b, 0);
619 blob_put_string(&b, UBUS_ATTR_OBJPATH, path);
621 if (ubus_start_request(ctx, &req, b.head, UBUS_MSG_LOOKUP, 0) < 0)
622 return UBUS_STATUS_INVALID_ARGUMENT;
624 req.raw_data_cb = ubus_lookup_id_cb;
627 return ubus_complete_request(ctx, &req, 0);
630 int ubus_send_reply(struct ubus_context *ctx, struct ubus_request_data *req,
631 struct blob_attr *msg)
635 blob_buf_init(&b, 0);
636 blob_put_int32(&b, UBUS_ATTR_OBJID, req->object);
637 blob_put(&b, UBUS_ATTR_DATA, blob_data(msg), blob_len(msg));
638 ret = ubus_send_msg(ctx, req->seq, b.head, UBUS_MSG_DATA, req->peer);
640 return UBUS_STATUS_NO_DATA;
645 int ubus_invoke_async(struct ubus_context *ctx, uint32_t obj, const char *method,
646 struct blob_attr *msg, struct ubus_request *req)
648 blob_buf_init(&b, 0);
649 blob_put_int32(&b, UBUS_ATTR_OBJID, obj);
650 blob_put_string(&b, UBUS_ATTR_METHOD, method);
652 blob_put(&b, UBUS_ATTR_DATA, blob_data(msg), blob_len(msg));
654 if (ubus_start_request(ctx, req, b.head, UBUS_MSG_INVOKE, obj) < 0)
655 return UBUS_STATUS_INVALID_ARGUMENT;
660 int ubus_invoke(struct ubus_context *ctx, uint32_t obj, const char *method,
661 struct blob_attr *msg, ubus_data_handler_t cb, void *priv,
664 struct ubus_request req;
666 ubus_invoke_async(ctx, obj, method, msg, &req);
669 return ubus_complete_request(ctx, &req, timeout);
672 static void ubus_add_object_cb(struct ubus_request *req, int type, struct blob_attr *msg)
674 struct ubus_object *obj = req->priv;
678 if (!attrbuf[UBUS_ATTR_OBJID])
681 obj->id = blob_get_u32(attrbuf[UBUS_ATTR_OBJID]);
683 if (attrbuf[UBUS_ATTR_OBJTYPE])
684 obj->type->id = blob_get_u32(attrbuf[UBUS_ATTR_OBJTYPE]);
686 obj->avl.key = &obj->id;
687 avl_insert(&req->ctx->objects, &obj->avl);
690 static void ubus_push_method_data(const struct ubus_method *m)
695 mtbl = blobmsg_open_table(&b, m->name);
697 for (i = 0; i < m->n_policy; i++)
698 blobmsg_add_u32(&b, m->policy[i].name, m->policy[i].type);
700 blobmsg_close_table(&b, mtbl);
703 static bool ubus_push_object_type(const struct ubus_object_type *type)
708 s = blob_nest_start(&b, UBUS_ATTR_SIGNATURE);
710 for (i = 0; i < type->n_methods; i++)
711 ubus_push_method_data(&type->methods[i]);
713 blob_nest_end(&b, s);
718 int ubus_add_object(struct ubus_context *ctx, struct ubus_object *obj)
720 struct ubus_request req;
723 blob_buf_init(&b, 0);
725 if (obj->name && obj->type) {
726 blob_put_string(&b, UBUS_ATTR_OBJPATH, obj->name);
729 blob_put_int32(&b, UBUS_ATTR_OBJTYPE, obj->type->id);
730 else if (!ubus_push_object_type(obj->type))
731 return UBUS_STATUS_INVALID_ARGUMENT;
734 if (ubus_start_request(ctx, &req, b.head, UBUS_MSG_ADD_OBJECT, 0) < 0)
735 return UBUS_STATUS_INVALID_ARGUMENT;
737 req.raw_data_cb = ubus_add_object_cb;
739 ret = ubus_complete_request(ctx, &req, 0);
744 return UBUS_STATUS_NO_DATA;
749 static void ubus_remove_object_cb(struct ubus_request *req, int type, struct blob_attr *msg)
751 struct ubus_object *obj = req->priv;
755 if (!attrbuf[UBUS_ATTR_OBJID])
760 if (attrbuf[UBUS_ATTR_OBJTYPE] && obj->type)
763 avl_delete(&req->ctx->objects, &obj->avl);
766 int ubus_remove_object(struct ubus_context *ctx, struct ubus_object *obj)
768 struct ubus_request req;
771 blob_buf_init(&b, 0);
772 blob_put_int32(&b, UBUS_ATTR_OBJID, obj->id);
774 if (ubus_start_request(ctx, &req, b.head, UBUS_MSG_REMOVE_OBJECT, 0) < 0)
775 return UBUS_STATUS_INVALID_ARGUMENT;
777 req.raw_data_cb = ubus_remove_object_cb;
779 ret = ubus_complete_request(ctx, &req, 0);
784 return UBUS_STATUS_NO_DATA;
789 static int ubus_event_cb(struct ubus_context *ctx, struct ubus_object *obj,
790 struct ubus_request_data *req,
791 const char *method, struct blob_attr *msg)
793 struct ubus_event_handler *ev;
795 ev = container_of(obj, struct ubus_event_handler, obj);
796 ev->cb(ctx, ev, method, msg);
800 static const struct ubus_method event_method = {
802 .handler = ubus_event_cb,
805 int ubus_register_event_handler(struct ubus_context *ctx,
806 struct ubus_event_handler *ev,
809 struct ubus_object *obj = &ev->obj;
814 obj->methods = &event_method;
817 if (!!obj->name ^ !!obj->type)
818 return UBUS_STATUS_INVALID_ARGUMENT;
820 ret = ubus_add_object(ctx, obj);
825 /* use a second buffer, ubus_invoke() overwrites the primary one */
826 memset(&b2, 0, sizeof(b2));
827 blob_buf_init(&b2, 0);
828 blobmsg_add_u32(&b2, "object", obj->id);
830 blobmsg_add_string(&b2, "pattern", pattern);
832 return ubus_invoke(ctx, UBUS_SYSTEM_OBJECT_EVENT, "register", b2.head,
842 static const struct blobmsg_policy watch_policy[] = {
843 [WATCH_ID] = { .name = "id", .type = BLOBMSG_TYPE_INT32 },
844 [WATCH_NOTIFY] = { .name = "notify", .type = BLOBMSG_TYPE_STRING },
848 static int ubus_watch_cb(struct ubus_context *ctx, struct ubus_object *obj,
849 struct ubus_request_data *req,
850 const char *method, struct blob_attr *msg)
852 struct ubus_watch_object *w;
853 struct blob_attr *tb[__WATCH_MAX];
855 blobmsg_parse(watch_policy, ARRAY_SIZE(watch_policy), tb, blob_data(msg), blob_len(msg));
857 if (!tb[WATCH_ID] || !tb[WATCH_NOTIFY])
858 return UBUS_STATUS_INVALID_ARGUMENT;
861 return UBUS_STATUS_INVALID_ARGUMENT;
863 w = container_of(obj, struct ubus_watch_object, obj);
864 w->cb(ctx, w, blobmsg_get_u32(tb[WATCH_ID]));
868 static const struct ubus_method watch_method = {
870 .handler = ubus_watch_cb,
873 int ubus_register_watch_object(struct ubus_context *ctx, struct ubus_watch_object *w_obj)
875 struct ubus_object *obj = &w_obj->obj;
877 obj->methods = &watch_method;
880 return ubus_add_object(ctx, obj);
884 __ubus_watch_request(struct ubus_context *ctx, struct ubus_object *obj, uint32_t id, const char *method, int type)
886 struct ubus_request req;
888 blob_buf_init(&b, 0);
889 blob_put_int32(&b, UBUS_ATTR_OBJID, obj->id);
890 blob_put_int32(&b, UBUS_ATTR_TARGET, id);
892 blob_put_string(&b, UBUS_ATTR_METHOD, method);
894 if (ubus_start_request(ctx, &req, b.head, type, 0) < 0)
895 return UBUS_STATUS_INVALID_ARGUMENT;
897 return ubus_complete_request(ctx, &req, 0);
901 int ubus_watch_object_add(struct ubus_context *ctx, struct ubus_watch_object *obj, uint32_t id)
903 return __ubus_watch_request(ctx, &obj->obj, id, "event", UBUS_MSG_ADD_WATCH);
906 int ubus_watch_object_remove(struct ubus_context *ctx, struct ubus_watch_object *obj, uint32_t id)
908 return __ubus_watch_request(ctx, &obj->obj, id, NULL, UBUS_MSG_REMOVE_WATCH);
911 int ubus_send_event(struct ubus_context *ctx, const char *id,
912 struct blob_attr *data)
914 struct ubus_request req;
917 blob_buf_init(&b, 0);
918 blob_put_int32(&b, UBUS_ATTR_OBJID, UBUS_SYSTEM_OBJECT_EVENT);
919 blob_put_string(&b, UBUS_ATTR_METHOD, "send");
920 s = blob_nest_start(&b, UBUS_ATTR_DATA);
921 blobmsg_add_string(&b, "id", id);
922 blobmsg_add_field(&b, BLOBMSG_TYPE_TABLE, "data", blob_data(data), blob_len(data));
923 blob_nest_end(&b, s);
925 if (ubus_start_request(ctx, &req, b.head, UBUS_MSG_INVOKE, UBUS_SYSTEM_OBJECT_EVENT) < 0)
926 return UBUS_STATUS_INVALID_ARGUMENT;
928 return ubus_complete_request(ctx, &req, 0);
932 ubus_refresh_state(struct ubus_context *ctx)
934 struct ubus_object *obj, *tmp;
936 /* clear all type IDs, they need to be registered again */
937 avl_for_each_element(&ctx->objects, obj, avl)
940 /* push out all objects again */
941 avl_for_each_element_safe(&ctx->objects, obj, avl, tmp) {
943 avl_delete(&ctx->objects, &obj->avl);
944 ubus_add_object(ctx, obj);
948 int ubus_reconnect(struct ubus_context *ctx, const char *path)
951 struct ubus_msghdr hdr;
952 struct blob_attr data;
954 struct blob_attr *buf;
955 int ret = UBUS_STATUS_UNKNOWN_ERROR;
958 path = UBUS_UNIX_SOCKET;
960 if (ctx->sock.fd >= 0) {
961 if (ctx->sock.registered)
962 uloop_fd_delete(&ctx->sock);
967 ctx->sock.fd = usock(USOCK_UNIX, path, NULL);
968 if (ctx->sock.fd < 0)
969 return UBUS_STATUS_CONNECTION_FAILED;
971 if (read(ctx->sock.fd, &hdr, sizeof(hdr)) != sizeof(hdr))
974 if (!ubus_validate_hdr(&hdr.hdr))
977 if (hdr.hdr.type != UBUS_MSG_HELLO)
980 buf = calloc(1, blob_raw_len(&hdr.data));
984 memcpy(buf, &hdr.data, sizeof(hdr.data));
985 if (read(ctx->sock.fd, blob_data(buf), blob_len(buf)) != blob_len(buf))
988 ctx->local_id = hdr.hdr.peer;
992 ret = UBUS_STATUS_OK;
993 fcntl(ctx->sock.fd, F_SETFL, fcntl(ctx->sock.fd, F_GETFL) | O_NONBLOCK);
995 ubus_refresh_state(ctx);
1001 close(ctx->sock.fd);
1006 static void ubus_default_connection_lost(struct ubus_context *ctx)
1008 if (ctx->sock.registered)
1012 struct ubus_context *ubus_connect(const char *path)
1014 struct ubus_context *ctx;
1016 ctx = calloc(1, sizeof(*ctx));
1021 ctx->sock.cb = ubus_handle_data;
1022 ctx->connection_lost = ubus_default_connection_lost;
1024 INIT_LIST_HEAD(&ctx->requests);
1025 INIT_LIST_HEAD(&ctx->pending);
1026 avl_init(&ctx->objects, ubus_cmp_id, false, NULL);
1027 if (ubus_reconnect(ctx, path)) {
1035 void ubus_free(struct ubus_context *ctx)
1037 close(ctx->sock.fd);