X-Git-Url: http://git.archive.openwrt.org/?p=project%2Fubus.git;a=blobdiff_plain;f=libubus.c;h=3050509a781ca975e702ace3e5e42b21b5c379e0;hp=d90dc1f5c8392819c92af34348df0f5e6c414b2c;hb=d2f1a01d9f6b49d7353dc848018c176400091741;hpb=c55408c4d023b67f6156f330e3442169bd53da16

diff --git a/libubus.c b/libubus.c
index d90dc1f..3050509 100644
--- a/libubus.c
+++ b/libubus.c
@@ -27,6 +27,7 @@ const char *__ubus_strerror[__UBUS_STATUS_LAST] = {
 	[UBUS_STATUS_METHOD_NOT_FOUND] = "Method not found",
 	[UBUS_STATUS_NOT_FOUND] = "Not found",
 	[UBUS_STATUS_NO_DATA] = "No response",
+	[UBUS_STATUS_PERMISSION_DENIED] = "Permission denied",
 };
 
 static struct blob_buf b;
@@ -55,7 +56,7 @@ static int ubus_cmp_id(const void *k1, const void *k2, void *ptr)
 		return *id1 > *id2;
 }
 
-struct blob_attr **ubus_parse_msg(struct blob_attr *msg)
+static struct blob_attr **ubus_parse_msg(struct blob_attr *msg)
 {
 	blob_parse(msg, attrbuf, ubus_policy, UBUS_ATTR_MAX);
 	return attrbuf;
@@ -102,8 +103,8 @@ static int ubus_send_msg(struct ubus_context *ctx, uint32_t seq,
 	return writev(ctx->sock.fd, iov, 2);
 }
 
-int ubus_start_request(struct ubus_context *ctx, struct ubus_request *req,
-		       struct blob_attr *msg, int cmd, uint32_t peer)
+static int ubus_start_request(struct ubus_context *ctx, struct ubus_request *req,
+			      struct blob_attr *msg, int cmd, uint32_t peer)
 {
 	memset(req, 0, sizeof(*req));
 
@@ -123,6 +124,8 @@ static bool recv_retry(int fd, struct iovec *iov, bool wait)
 		bytes = read(fd, iov->iov_base, iov->iov_len);
 		if (bytes < 0) {
 			bytes = 0;
+			if (uloop_cancelled)
+				return false;
 			if (errno == EINTR)
 				continue;
 
@@ -179,10 +182,24 @@ static bool ubus_get_status(struct ubus_msghdr *hdr, int *ret)
 	if (!attrbuf[UBUS_ATTR_STATUS])
 		return false;
 
-	*ret = blob_get_int32(attrbuf[UBUS_ATTR_STATUS]);
+	*ret = blob_get_u32(attrbuf[UBUS_ATTR_STATUS]);
 	return true;
 }
 
+static void req_data_cb(struct ubus_request *req, int type, struct blob_attr *data)
+{
+	struct blob_attr **attr;
+
+	if (req->raw_data_cb)
+		req->raw_data_cb(req, type, data);
+
+	if (!req->data_cb)
+		return;
+
+	attr = ubus_parse_msg(data);
+	req->data_cb(req, type, attr[UBUS_ATTR_DATA]);
+}
+
 static void ubus_process_req_data(struct ubus_request *req)
 {
 	struct ubus_pending_data *data;
@@ -192,7 +209,7 @@ static void ubus_process_req_data(struct ubus_request *req)
 			struct ubus_pending_data, list);
 		list_del(&data->list);
 		if (!req->cancelled)
-			req->data_cb(req, data->type, data->data);
+			req_data_cb(req, data->type, data->data);
 		free(data);
 	}
 }
@@ -232,7 +249,7 @@ static void ubus_req_data(struct ubus_request *req, struct ubus_msghdr *hdr)
 
 	if (!req->blocked) {
 		req->blocked = true;
-		req->data_cb(req, hdr->type, hdr->data);
+		req_data_cb(req, hdr->type, hdr->data);
 		ubus_process_req_data(req);
 		req->blocked = false;
 
@@ -275,12 +292,16 @@ static void ubus_process_invoke(struct ubus_context *ctx, struct ubus_msghdr *hd
 
 	ubus_parse_msg(hdr->data);
 
-	if (!attrbuf[UBUS_ATTR_METHOD] || !attrbuf[UBUS_ATTR_OBJID]) {
+	if (!attrbuf[UBUS_ATTR_OBJID])
+		return;
+
+	objid = blob_get_u32(attrbuf[UBUS_ATTR_OBJID]);
+
+	if (!attrbuf[UBUS_ATTR_METHOD]) {
 		ret = UBUS_STATUS_INVALID_ARGUMENT;
 		goto send;
 	}
 
-	objid = blob_get_int32(attrbuf[UBUS_ATTR_OBJID]);
 	obj = avl_find_element(&ctx->objects, &objid, obj, avl);
 	if (!obj) {
 		ret = UBUS_STATUS_NOT_FOUND;
@@ -288,7 +309,8 @@ static void ubus_process_invoke(struct ubus_context *ctx, struct ubus_msghdr *hd
 	}
 
 	for (method = 0; method < obj->n_methods; method++)
-		if (!strcmp(obj->methods[method].name,
+		if (!obj->methods[method].name ||
+		    !strcmp(obj->methods[method].name,
 		            blob_data(attrbuf[UBUS_ATTR_METHOD])))
 			goto found;
 
@@ -300,7 +322,8 @@ found:
 	req.object = objid;
 	req.peer = hdr->peer;
 	req.seq = hdr->seq;
-	ret = obj->methods[method].handler(obj, &req, obj->methods[method].name,
+	ret = obj->methods[method].handler(ctx, obj, &req,
+					   obj->methods[method].name,
 					   attrbuf[UBUS_ATTR_DATA]);
 
 send:
@@ -325,7 +348,7 @@ static void ubus_process_msg(struct ubus_context *ctx, struct ubus_msghdr *hdr)
 
 	case UBUS_MSG_DATA:
 		req = ubus_find_request(ctx, hdr->seq, hdr->peer);
-		if (req && req->data_cb)
+		if (req && (req->data_cb || req->raw_data_cb))
 			ubus_req_data(req, hdr);
 		break;
 
@@ -363,6 +386,9 @@ static void ubus_handle_data(struct uloop_fd *u, unsigned int events)
 
 	while (get_next_msg(ctx, false))
 		ubus_process_msg(ctx, hdr);
+
+	if (u->eof)
+		ctx->connection_lost(ctx);
 }
 
 int ubus_complete_request(struct ubus_context *ctx, struct ubus_request *req)
@@ -389,7 +415,7 @@ int ubus_complete_request(struct ubus_context *ctx, struct ubus_request *req)
 		case UBUS_MSG_STATUS:
 			return ubus_process_req_status(req, hdr);
 		case UBUS_MSG_DATA:
-			if (req->data_cb)
+			if (req->data_cb || req->raw_data_cb)
 				ubus_req_data(req, hdr);
 			continue;
 		default:
@@ -401,13 +427,97 @@ skip:
 	}
 }
 
+struct ubus_lookup_request {
+	struct ubus_request req;
+	ubus_lookup_handler_t cb;
+};
+
+static void ubus_lookup_cb(struct ubus_request *ureq, int type, struct blob_attr *msg)
+{
+	struct ubus_lookup_request *req;
+	struct ubus_object_data obj;
+	struct blob_attr **attr;
+
+	req = container_of(ureq, struct ubus_lookup_request, req);
+	attr = ubus_parse_msg(msg);
+
+	if (!attr[UBUS_ATTR_OBJID] || !attr[UBUS_ATTR_OBJPATH] ||
+	    !attr[UBUS_ATTR_OBJTYPE])
+		return;
+
+	memset(&obj, 0, sizeof(obj));
+	obj.id = blob_get_u32(attr[UBUS_ATTR_OBJID]);
+	obj.path = blob_data(attr[UBUS_ATTR_OBJPATH]);
+	obj.type_id = blob_get_u32(attr[UBUS_ATTR_OBJTYPE]);
+	obj.signature = attr[UBUS_ATTR_SIGNATURE];
+	req->cb(ureq->ctx, &obj, ureq->priv);
+}
+
+int ubus_lookup(struct ubus_context *ctx, const char *path,
+		ubus_lookup_handler_t cb, void *priv)
+{
+	struct ubus_lookup_request lookup;
+
+	blob_buf_init(&b, 0);
+	if (path)
+		blob_put_string(&b, UBUS_ATTR_OBJPATH, path);
+	ubus_start_request(ctx, &lookup.req, b.head, UBUS_MSG_LOOKUP, 0);
+	lookup.req.raw_data_cb = ubus_lookup_cb;
+	lookup.req.priv = priv;
+	lookup.cb = cb;
+	return ubus_complete_request(ctx, &lookup.req);
+}
+
+static void ubus_lookup_id_cb(struct ubus_request *req, int type, struct blob_attr *msg)
+{
+	struct blob_attr **attr;
+	uint32_t *id = req->priv;
+
+	attr = ubus_parse_msg(msg);
+
+	if (!attr[UBUS_ATTR_OBJID])
+		return;
+
+	*id = blob_get_u32(attr[UBUS_ATTR_OBJID]);
+}
+
+int ubus_lookup_id(struct ubus_context *ctx, const char *path, uint32_t *id)
+{
+	struct ubus_request req;
+
+	blob_buf_init(&b, 0);
+	if (path)
+		blob_put_string(&b, UBUS_ATTR_OBJPATH, path);
+	ubus_start_request(ctx, &req, b.head, UBUS_MSG_LOOKUP, 0);
+	req.raw_data_cb = ubus_lookup_id_cb;
+	req.priv = id;
+
+	return ubus_complete_request(ctx, &req);
+}
+
+int ubus_send_reply(struct ubus_context *ctx, struct ubus_request_data *req,
+		    struct blob_attr *msg)
+{
+	int ret;
+
+	blob_buf_init(&b, 0);
+	blob_put_int32(&b, UBUS_ATTR_OBJID, req->object);
+	blob_put(&b, UBUS_ATTR_DATA, blob_data(msg), blob_len(msg));
+	ret = ubus_send_msg(ctx, req->seq, b.head, UBUS_MSG_DATA, req->peer);
+	if (ret < 0)
+		return UBUS_STATUS_NO_DATA;
+
+	return 0;
+}
+
 void ubus_invoke_async(struct ubus_context *ctx, uint32_t obj, const char *method,
                        struct blob_attr *msg, struct ubus_request *req)
 {
 	blob_buf_init(&b, 0);
 	blob_put_int32(&b, UBUS_ATTR_OBJID, obj);
 	blob_put_string(&b, UBUS_ATTR_METHOD, method);
-	blob_put(&b, UBUS_ATTR_DATA, blob_data(msg), blob_len(msg));
+	if (msg)
+		blob_put(&b, UBUS_ATTR_DATA, blob_data(msg), blob_len(msg));
 
 	ubus_start_request(ctx, req, b.head, UBUS_MSG_INVOKE, obj);
 }
@@ -423,7 +533,7 @@ int ubus_invoke(struct ubus_context *ctx, uint32_t obj, const char *method,
 	return ubus_complete_request(ctx, &req);
 }
 
-static void ubus_publish_cb(struct ubus_request *req, int type, struct blob_attr *msg)
+static void ubus_add_object_cb(struct ubus_request *req, int type, struct blob_attr *msg)
 {
 	struct ubus_object *obj = req->priv;
 
@@ -432,10 +542,10 @@ static void ubus_publish_cb(struct ubus_request *req, int type, struct blob_attr
 	if (!attrbuf[UBUS_ATTR_OBJID])
 		return;
 
-	obj->id = blob_get_int32(attrbuf[UBUS_ATTR_OBJID]);
+	obj->id = blob_get_u32(attrbuf[UBUS_ATTR_OBJID]);
 
 	if (attrbuf[UBUS_ATTR_OBJTYPE])
-		obj->type->id = blob_get_int32(attrbuf[UBUS_ATTR_OBJTYPE]);
+		obj->type->id = blob_get_u32(attrbuf[UBUS_ATTR_OBJTYPE]);
 
 	obj->avl.key = &obj->id;
 	avl_insert(&req->ctx->objects, &obj->avl);
@@ -499,24 +609,24 @@ static bool ubus_push_object_type(struct ubus_object_type *type)
 	return true;
 }
 
-int ubus_publish(struct ubus_context *ctx, struct ubus_object *obj)
+static int __ubus_add_object(struct ubus_context *ctx, struct ubus_object *obj)
 {
 	struct ubus_request req;
 	int ret;
 
-	if (obj->id || !obj->name || !obj->type)
-		return UBUS_STATUS_INVALID_ARGUMENT;
-
 	blob_buf_init(&b, 0);
-	blob_put_string(&b, UBUS_ATTR_OBJPATH, obj->name);
 
-	if (obj->type->id)
-		blob_put_int32(&b, UBUS_ATTR_OBJTYPE, obj->type->id);
-	else if (!ubus_push_object_type(obj->type))
-		return UBUS_STATUS_INVALID_ARGUMENT;
+	if (obj->name && obj->type) {
+		blob_put_string(&b, UBUS_ATTR_OBJPATH, obj->name);
 
-	ubus_start_request(ctx, &req, b.head, UBUS_MSG_PUBLISH, 0);
-	req.data_cb = ubus_publish_cb;
+		if (obj->type->id)
+			blob_put_int32(&b, UBUS_ATTR_OBJTYPE, obj->type->id);
+		else if (!ubus_push_object_type(obj->type))
+			return UBUS_STATUS_INVALID_ARGUMENT;
+	}
+
+	ubus_start_request(ctx, &req, b.head, UBUS_MSG_ADD_OBJECT, 0);
+	req.raw_data_cb = ubus_add_object_cb;
 	req.priv = obj;
 	ret = ubus_complete_request(ctx, &req);
 	if (ret)
@@ -528,6 +638,107 @@ int ubus_publish(struct ubus_context *ctx, struct ubus_object *obj)
 	return 0;
 }
 
+int ubus_add_object(struct ubus_context *ctx, struct ubus_object *obj)
+{
+	if (!obj->name || !obj->type)
+		return UBUS_STATUS_INVALID_ARGUMENT;
+
+	return __ubus_add_object(ctx, obj);
+}
+
+static void ubus_remove_object_cb(struct ubus_request *req, int type, struct blob_attr *msg)
+{
+	struct ubus_object *obj = req->priv;
+
+	ubus_parse_msg(msg);
+
+	if (!attrbuf[UBUS_ATTR_OBJID])
+		return;
+
+	obj->id = 0;
+
+	if (attrbuf[UBUS_ATTR_OBJTYPE] && obj->type)
+		obj->type->id = 0;
+
+	avl_delete(&req->ctx->objects, &obj->avl);
+}
+
+int ubus_remove_object(struct ubus_context *ctx, struct ubus_object *obj)
+{
+	struct ubus_request req;
+	int ret;
+
+	blob_buf_init(&b, 0);
+	blob_put_int32(&b, UBUS_ATTR_OBJID, obj->id);
+	ubus_start_request(ctx, &req, b.head, UBUS_MSG_REMOVE_OBJECT, 0);
+	req.raw_data_cb = ubus_remove_object_cb;
+	req.priv = obj;
+	ret = ubus_complete_request(ctx, &req);
+	if (ret)
+		return ret;
+
+	if (obj->id)
+		return UBUS_STATUS_NO_DATA;
+
+	return 0;
+}
+
+static int ubus_event_cb(struct ubus_context *ctx, struct ubus_object *obj,
+			 struct ubus_request_data *req,
+			 const char *method, struct blob_attr *msg)
+{
+	struct ubus_event_handler *ev;
+
+	ev = container_of(obj, struct ubus_event_handler, obj);
+	ev->cb(ctx, ev, method, msg);
+	return 0;
+}
+
+static const struct ubus_method event_method = {
+	.name = NULL,
+	.handler = ubus_event_cb,
+};
+
+int ubus_register_event_handler(struct ubus_context *ctx,
+				struct ubus_event_handler *ev,
+				const char *pattern)
+{
+	struct ubus_object *obj = &ev->obj;
+	struct blob_buf b2;
+	int ret;
+
+	if (!obj->id) {
+		obj->methods = &event_method;
+		obj->n_methods = 1;
+
+		if (!!obj->name ^ !!obj->type)
+			return UBUS_STATUS_INVALID_ARGUMENT;
+
+		ret = __ubus_add_object(ctx, obj);
+		if (ret)
+			return ret;
+	}
+
+	/* use a second buffer, ubus_invoke() overwrites the primary one */
+	memset(&b2, 0, sizeof(b2));
+	blob_buf_init(&b2, 0);
+	blobmsg_add_u32(&b2, "object", obj->id);
+	if (pattern)
+		blobmsg_add_string(&b2, "pattern", pattern);
+
+	ret = ubus_invoke(ctx, UBUS_SYSTEM_OBJECT_EVENT, "register", b2.head,
+			  NULL, NULL);
+
+	return 0;
+}
+
+
+void ubus_default_connection_lost(struct ubus_context *ctx)
+{
+	if (ctx->sock.registered)
+		uloop_end();
+}
+
 struct ubus_context *ubus_connect(const char *path)
 {
 	struct ubus_context *ctx;
@@ -545,47 +756,38 @@ struct ubus_context *ubus_connect(const char *path)
 		goto error;
 
 	ctx->sock.fd = usock(USOCK_UNIX, path, NULL);
-	if (ctx->sock.fd < 0) {
-		DPRINTF("Failed to connect to server\n");
+	if (ctx->sock.fd < 0)
 		goto error_free;
-	}
+
 	ctx->sock.cb = ubus_handle_data;
 
-	if (read(ctx->sock.fd, &hdr, sizeof(hdr)) != sizeof(hdr)) {
-		DPRINTF("Failed to read initial message data\n");
+	if (read(ctx->sock.fd, &hdr, sizeof(hdr)) != sizeof(hdr))
 		goto error_close;
-	}
 
-	if (!ubus_validate_hdr(&hdr.hdr)) {
-		DPRINTF("Failed to validate initial message header\n");
+	if (!ubus_validate_hdr(&hdr.hdr))
 		goto error_close;
-	}
 
-	if (hdr.hdr.type != UBUS_MSG_HELLO) {
-		DPRINTF("Unexpected initial message\n");
+	if (hdr.hdr.type != UBUS_MSG_HELLO)
 		goto error_close;
-	}
 
 	buf = calloc(1, blob_raw_len(&hdr.data));
 	if (!buf)
 		goto error_close;
 
 	memcpy(buf, &hdr.data, sizeof(hdr.data));
-	if (read(ctx->sock.fd, blob_data(buf), blob_len(buf)) != blob_len(buf)) {
-		DPRINTF("Failed to retrieve initial message data\n");
+	if (read(ctx->sock.fd, blob_data(buf), blob_len(buf)) != blob_len(buf))
 		goto error_free_buf;
-	}
 
 	ctx->local_id = hdr.hdr.peer;
 	free(buf);
 
+	ctx->connection_lost = ubus_default_connection_lost;
+
 	INIT_LIST_HEAD(&ctx->requests);
 	avl_init(&ctx->objects, ubus_cmp_id, false, NULL);
 
-	if (!ctx->local_id) {
-		DPRINTF("Failed to get local peer id\n");
+	if (!ctx->local_id)
 		goto error_close;
-	}
 
 	return ctx;