X-Git-Url: http://git.archive.openwrt.org/?p=project%2Fubus.git;a=blobdiff_plain;f=libubus.c;h=d52faff9d9cd11b573584268df21f776b6fbe379;hp=bcaf63dc377f4a158a1cda98b70997f69e077ff4;hb=619f3a160de4f417226b69039538882787b3811c;hpb=a6f52f058e52c7720afb05e5e4e51648e636b940;ds=sidebyside

diff --git a/libubus.c b/libubus.c
index bcaf63d..d52faff 100644
--- a/libubus.c
+++ b/libubus.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2011-2012 Felix Fietkau <nbd@openwrt.org>
+ * Copyright (C) 2011-2014 Felix Fietkau <nbd@openwrt.org>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU Lesser General Public License version 2.1
@@ -38,19 +38,11 @@ const char *__ubus_strerror[__UBUS_STATUS_LAST] = {
 
 struct blob_buf b __hidden = {};
 
-struct ubus_pending_data {
+struct ubus_pending_msg {
 	struct list_head list;
-	int type;
-	struct blob_attr data[];
+	struct ubus_msghdr_buf hdr;
 };
 
-struct ubus_pending_invoke {
-	struct list_head list;
-	struct ubus_msghdr hdr;
-};
-
-static void ubus_process_pending_invoke(struct ubus_context *ctx);
-
 static int ubus_cmp_id(const void *k1, const void *k2, void *ptr)
 {
 	const uint32_t *id1 = k1, *id2 = k2;
@@ -78,259 +70,59 @@ out:
 	return err;
 }
 
-static bool ubus_get_status(struct ubus_msghdr *hdr, int *ret)
-{
-	struct blob_attr **attrbuf = ubus_parse_msg(hdr->data);
-
-	if (!attrbuf[UBUS_ATTR_STATUS])
-		return false;
-
-	*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;
-
-	while (!list_empty(&req->pending)) {
-		data = list_first_entry(&req->pending,
-			struct ubus_pending_data, list);
-		list_del(&data->list);
-		if (!req->cancelled)
-			req_data_cb(req, data->type, data->data);
-		free(data);
-	}
-}
-
-static void ubus_req_complete_cb(struct ubus_request *req)
-{
-	ubus_complete_handler_t cb = req->complete_cb;
-
-	if (!cb)
-		return;
-
-	req->complete_cb = NULL;
-	cb(req, req->status_code);
-}
-
-static int ubus_process_req_status(struct ubus_request *req, struct ubus_msghdr *hdr)
+static void
+ubus_queue_msg(struct ubus_context *ctx, struct ubus_msghdr_buf *buf)
 {
-	int ret = UBUS_STATUS_INVALID_ARGUMENT;
+	struct ubus_pending_msg *pending;
+	void *data;
 
-	if (!list_empty(&req->list))
-		list_del_init(&req->list);
+	pending = calloc_a(sizeof(*pending), &data, blob_raw_len(buf->data));
 
-	ubus_get_status(hdr, &ret);
-	req->peer = hdr->peer;
-	req->status_msg = true;
-	req->status_code = ret;
-	if (!req->blocked)
-		ubus_req_complete_cb(req);
-
-	return ret;
-}
-
-static void ubus_req_data(struct ubus_request *req, struct ubus_msghdr *hdr)
-{
-	struct ubus_pending_data *data;
-	int len;
-
-	if (!req->blocked) {
-		req->blocked = true;
-		req_data_cb(req, hdr->type, hdr->data);
-		ubus_process_req_data(req);
-		req->blocked = false;
-
-		if (req->status_msg)
-			ubus_req_complete_cb(req);
-
-		return;
-	}
-
-	len = blob_raw_len(hdr->data);
-	data = calloc(1, sizeof(*data) + len);
-	if (!data)
-		return;
-
-	data->type = hdr->type;
-	memcpy(data->data, hdr->data, len);
-	list_add(&data->list, &req->pending);
-}
-
-static struct ubus_request *ubus_find_request(struct ubus_context *ctx, uint32_t seq, uint32_t peer)
-{
-	struct ubus_request *req;
-
-	list_for_each_entry(req, &ctx->requests, list) {
-		if (seq != req->seq || peer != req->peer)
-			continue;
-
-		return req;
-	}
-	return NULL;
-}
-
-void ubus_complete_deferred_request(struct ubus_context *ctx, struct ubus_request_data *req, int ret)
-{
-	blob_buf_init(&b, 0);
-	blob_put_int32(&b, UBUS_ATTR_STATUS, ret);
-	blob_put_int32(&b, UBUS_ATTR_OBJID, req->object);
-	ubus_send_msg(ctx, req->seq, b.head, UBUS_MSG_STATUS, req->peer);
+	pending->hdr.data = data;
+	memcpy(&pending->hdr.hdr, &buf->hdr, sizeof(buf->hdr));
+	memcpy(data, buf->data, blob_raw_len(buf->data));
+	list_add_tail(&pending->list, &ctx->pending);
+	if (ctx->sock.registered)
+		uloop_timeout_set(&ctx->pending_timer, 1);
 }
 
-void __hidden ubus_process_msg(struct ubus_context *ctx, struct ubus_msghdr *hdr)
+void __hidden
+ubus_process_msg(struct ubus_context *ctx, struct ubus_msghdr_buf *buf, int fd)
 {
-	struct ubus_pending_invoke *pending;
-	struct ubus_request *req;
-
-	switch(hdr->type) {
+	switch(buf->hdr.type) {
 	case UBUS_MSG_STATUS:
-		req = ubus_find_request(ctx, hdr->seq, hdr->peer);
-		if (!req)
-			break;
-
-		ubus_process_req_status(req, hdr);
-		break;
-
 	case UBUS_MSG_DATA:
-		req = ubus_find_request(ctx, hdr->seq, hdr->peer);
-		if (req && (req->data_cb || req->raw_data_cb))
-			ubus_req_data(req, hdr);
+		ubus_process_req_msg(ctx, buf, fd);
 		break;
 
 	case UBUS_MSG_INVOKE:
-		if (ctx->stack_depth > 2) {
-			pending = calloc(1, sizeof(*pending) +
-				blob_raw_len(hdr->data));
-
-			if (!pending)
-				return;
-
-			memcpy(&pending->hdr, hdr, sizeof(*hdr) +
-				blob_raw_len(hdr->data));
-			list_add(&pending->list, &ctx->pending);
-		} else {
-			ubus_process_invoke(ctx, hdr);
+	case UBUS_MSG_UNSUBSCRIBE:
+	case UBUS_MSG_NOTIFY:
+		if (ctx->stack_depth) {
+			ubus_queue_msg(ctx, buf);
+			break;
 		}
+
+		ubus_process_obj_msg(ctx, buf);
+		break;
+	case UBUS_MSG_MONITOR:
+		if (ctx->monitor_cb)
+			ctx->monitor_cb(ctx, buf->hdr.seq, buf->data);
 		break;
 	}
 }
 
-static void ubus_process_pending_invoke(struct ubus_context *ctx)
+static void ubus_process_pending_msg(struct uloop_timeout *timeout)
 {
-	struct ubus_pending_invoke *pending, *tmp;
+	struct ubus_context *ctx = container_of(timeout, struct ubus_context, pending_timer);
+	struct ubus_pending_msg *pending;
 
-	list_for_each_entry_safe(pending, tmp, &ctx->pending, list) {
+	while (!ctx->stack_depth && !list_empty(&ctx->pending)) {
+		pending = list_first_entry(&ctx->pending, struct ubus_pending_msg, list);
 		list_del(&pending->list);
-		ubus_process_msg(ctx, &pending->hdr);
+		ubus_process_msg(ctx, &pending->hdr, -1);
 		free(pending);
-		if (ctx->stack_depth > 2)
-			break;
-	}
-}
-
-void ubus_abort_request(struct ubus_context *ctx, struct ubus_request *req)
-{
-	if (!list_empty(&req->list))
-		return;
-
-	req->cancelled = true;
-	ubus_process_req_data(req);
-	list_del_init(&req->list);
-}
-
-void ubus_complete_request_async(struct ubus_context *ctx, struct ubus_request *req)
-{
-	if (!list_empty(&req->list))
-		return;
-
-	list_add(&req->list, &ctx->requests);
-}
-
-static void ubus_sync_req_cb(struct ubus_request *req, int ret)
-{
-	req->status_msg = true;
-	req->status_code = ret;
-	uloop_end();
-}
-
-struct ubus_sync_req_cb {
-	struct uloop_timeout timeout;
-	struct ubus_request *req;
-};
-
-static void ubus_sync_req_timeout_cb(struct uloop_timeout *timeout)
-{
-	struct ubus_sync_req_cb *cb;
-
-	cb = container_of(timeout, struct ubus_sync_req_cb, timeout);
-	ubus_sync_req_cb(cb->req, UBUS_STATUS_TIMEOUT);
-}
-
-int ubus_complete_request(struct ubus_context *ctx, struct ubus_request *req,
-			  int timeout)
-{
-	struct ubus_sync_req_cb cb;
-	ubus_complete_handler_t complete_cb = req->complete_cb;
-	bool registered = ctx->sock.registered;
-	int status = UBUS_STATUS_NO_DATA;
-
-	if (!registered) {
-		uloop_init();
-		ubus_add_uloop(ctx);
 	}
-
-	if (timeout) {
-		memset(&cb, 0, sizeof(cb));
-		cb.req = req;
-		cb.timeout.cb = ubus_sync_req_timeout_cb;
-		uloop_timeout_set(&cb.timeout, timeout);
-	}
-
-	ubus_complete_request_async(ctx, req);
-	req->complete_cb = ubus_sync_req_cb;
-
-	ctx->stack_depth++;
-	while (!req->status_msg) {
-		bool cancelled = uloop_cancelled;
-		uloop_cancelled = false;
-		uloop_run();
-		uloop_cancelled = cancelled;
-	}
-	ctx->stack_depth--;
-
-	if (timeout)
-		uloop_timeout_cancel(&cb.timeout);
-
-	if (req->status_msg)
-		status = req->status_code;
-
-	req->complete_cb = complete_cb;
-	if (req->complete_cb)
-		req->complete_cb(req, status);
-
-	if (!registered)
-		uloop_fd_delete(&ctx->sock);
-
-	if (!ctx->stack_depth)
-		ubus_process_pending_invoke(ctx);
-
-	return status;
 }
 
 struct ubus_lookup_request {
@@ -359,22 +151,6 @@ static void ubus_lookup_cb(struct ubus_request *ureq, int type, struct blob_attr
 	req->cb(ureq->ctx, &obj, ureq->priv);
 }
 
-int __hidden 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));
-
-	if (msg && blob_pad_len(msg) > UBUS_MAX_MSGLEN)
-		return -1;
-
-	INIT_LIST_HEAD(&req->list);
-	INIT_LIST_HEAD(&req->pending);
-	req->ctx = ctx;
-	req->peer = peer;
-	req->seq = ++ctx->request_seq;
-	return ubus_send_msg(ctx, req->seq, msg, cmd, peer);
-}
-
 int ubus_lookup(struct ubus_context *ctx, const char *path,
 		ubus_lookup_handler_t cb, void *priv)
 {
@@ -423,50 +199,6 @@ int ubus_lookup_id(struct ubus_context *ctx, const char *path, uint32_t *id)
 	return ubus_complete_request(ctx, &req, 0);
 }
 
-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;
-}
-
-int 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);
-	if (msg)
-		blob_put(&b, UBUS_ATTR_DATA, blob_data(msg), blob_len(msg));
-
-	if (ubus_start_request(ctx, req, b.head, UBUS_MSG_INVOKE, obj) < 0)
-		return UBUS_STATUS_INVALID_ARGUMENT;
-
-	return 0;
-}
-
-int ubus_invoke(struct ubus_context *ctx, uint32_t obj, const char *method,
-                struct blob_attr *msg, ubus_data_handler_t cb, void *priv,
-		int timeout)
-{
-	struct ubus_request req;
-
-	ubus_invoke_async(ctx, obj, method, msg, &req);
-	req.data_cb = cb;
-	req.priv = priv;
-	return ubus_complete_request(ctx, &req, timeout);
-}
-
-
-
 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)
@@ -510,109 +242,101 @@ int ubus_register_event_handler(struct ubus_context *ctx,
 	if (pattern)
 		blobmsg_add_string(&b2, "pattern", pattern);
 
-	return ubus_invoke(ctx, UBUS_SYSTEM_OBJECT_EVENT, "register", b2.head,
+	ret = ubus_invoke(ctx, UBUS_SYSTEM_OBJECT_EVENT, "register", b2.head,
 			  NULL, NULL, 0);
-}
-
-enum {
-	WATCH_ID,
-	WATCH_NOTIFY,
-	__WATCH_MAX
-};
-
-static const struct blobmsg_policy watch_policy[] = {
-	[WATCH_ID] = { .name = "id", .type = BLOBMSG_TYPE_INT32 },
-	[WATCH_NOTIFY] = { .name = "notify", .type = BLOBMSG_TYPE_STRING },
-};
+	blob_buf_free(&b2);
 
+	return ret;
+}
 
-static int ubus_watch_cb(struct ubus_context *ctx, struct ubus_object *obj,
-			 struct ubus_request_data *req,
-			 const char *method, struct blob_attr *msg)
+int ubus_send_event(struct ubus_context *ctx, const char *id,
+		    struct blob_attr *data)
 {
-	struct ubus_watch_object *w;
-	struct blob_attr *tb[__WATCH_MAX];
-
-	blobmsg_parse(watch_policy, ARRAY_SIZE(watch_policy), tb, blob_data(msg), blob_len(msg));
+	struct ubus_request req;
+	void *s;
 
-	if (!tb[WATCH_ID] || !tb[WATCH_NOTIFY])
-		return UBUS_STATUS_INVALID_ARGUMENT;
+	blob_buf_init(&b, 0);
+	blob_put_int32(&b, UBUS_ATTR_OBJID, UBUS_SYSTEM_OBJECT_EVENT);
+	blob_put_string(&b, UBUS_ATTR_METHOD, "send");
+	s = blob_nest_start(&b, UBUS_ATTR_DATA);
+	blobmsg_add_string(&b, "id", id);
+	blobmsg_add_field(&b, BLOBMSG_TYPE_TABLE, "data", blob_data(data), blob_len(data));
+	blob_nest_end(&b, s);
 
-	if (req->peer)
+	if (ubus_start_request(ctx, &req, b.head, UBUS_MSG_INVOKE, UBUS_SYSTEM_OBJECT_EVENT) < 0)
 		return UBUS_STATUS_INVALID_ARGUMENT;
 
-	w = container_of(obj, struct ubus_watch_object, obj);
-	w->cb(ctx, w, blobmsg_get_u32(tb[WATCH_ID]));
-	return 0;
+	return ubus_complete_request(ctx, &req, 0);
 }
 
-static const struct ubus_method watch_method = {
-	.name = NULL,
-	.handler = ubus_watch_cb,
-};
-
-int ubus_register_watch_object(struct ubus_context *ctx, struct ubus_watch_object *w_obj)
+static void ubus_default_connection_lost(struct ubus_context *ctx)
 {
-	struct ubus_object *obj = &w_obj->obj;
-
-	obj->methods = &watch_method;
-	obj->n_methods = 1;
-
-	return ubus_add_object(ctx, obj);
+	if (ctx->sock.registered)
+		uloop_end();
 }
 
-static int
-__ubus_watch_request(struct ubus_context *ctx, struct ubus_object *obj, uint32_t id, const char *method, int type)
+int ubus_connect_ctx(struct ubus_context *ctx, const char *path)
 {
-	struct ubus_request req;
+	memset(ctx, 0, sizeof(*ctx));
 
-	blob_buf_init(&b, 0);
-	blob_put_int32(&b, UBUS_ATTR_OBJID, obj->id);
-	blob_put_int32(&b, UBUS_ATTR_TARGET, id);
-	if (method)
-		blob_put_string(&b, UBUS_ATTR_METHOD, method);
+	ctx->sock.fd = -1;
+	ctx->sock.cb = ubus_handle_data;
+	ctx->connection_lost = ubus_default_connection_lost;
+	ctx->pending_timer.cb = ubus_process_pending_msg;
 
-	if (ubus_start_request(ctx, &req, b.head, type, 0) < 0)
-		return UBUS_STATUS_INVALID_ARGUMENT;
+	ctx->msgbuf.data = calloc(UBUS_MSG_CHUNK_SIZE, sizeof(char));
+	if (!ctx->msgbuf.data)
+		return -1;
+	ctx->msgbuf_data_len = UBUS_MSG_CHUNK_SIZE;
 
-	return ubus_complete_request(ctx, &req, 0);
+	INIT_LIST_HEAD(&ctx->requests);
+	INIT_LIST_HEAD(&ctx->pending);
+	avl_init(&ctx->objects, ubus_cmp_id, false, NULL);
+	if (ubus_reconnect(ctx, path)) {
+		free(ctx->msgbuf.data);
+		return -1;
+	}
 
+	return 0;
 }
 
-int ubus_watch_object_add(struct ubus_context *ctx, struct ubus_watch_object *obj, uint32_t id)
+static void ubus_auto_reconnect_cb(struct uloop_timeout *timeout)
 {
-	return __ubus_watch_request(ctx, &obj->obj, id, "event", UBUS_MSG_ADD_WATCH);
-}
+	struct ubus_auto_conn *conn = container_of(timeout, struct ubus_auto_conn, timer);
 
-int ubus_watch_object_remove(struct ubus_context *ctx, struct ubus_watch_object *obj, uint32_t id)
-{
-	return __ubus_watch_request(ctx, &obj->obj, id, NULL, UBUS_MSG_REMOVE_WATCH);
+	if (!ubus_reconnect(&conn->ctx, conn->path))
+		ubus_add_uloop(&conn->ctx);
+	else
+		uloop_timeout_set(timeout, 1000);
 }
 
-int ubus_send_event(struct ubus_context *ctx, const char *id,
-		    struct blob_attr *data)
+static void ubus_auto_disconnect_cb(struct ubus_context *ctx)
 {
-	struct ubus_request req;
-	void *s;
+	struct ubus_auto_conn *conn = container_of(ctx, struct ubus_auto_conn, ctx);
 
-	blob_buf_init(&b, 0);
-	blob_put_int32(&b, UBUS_ATTR_OBJID, UBUS_SYSTEM_OBJECT_EVENT);
-	blob_put_string(&b, UBUS_ATTR_METHOD, "send");
-	s = blob_nest_start(&b, UBUS_ATTR_DATA);
-	blobmsg_add_string(&b, "id", id);
-	blobmsg_add_field(&b, BLOBMSG_TYPE_TABLE, "data", blob_data(data), blob_len(data));
-	blob_nest_end(&b, s);
+	conn->timer.cb = ubus_auto_reconnect_cb;
+	uloop_timeout_set(&conn->timer, 1000);
+}
 
-	if (ubus_start_request(ctx, &req, b.head, UBUS_MSG_INVOKE, UBUS_SYSTEM_OBJECT_EVENT) < 0)
-		return UBUS_STATUS_INVALID_ARGUMENT;
+static void ubus_auto_connect_cb(struct uloop_timeout *timeout)
+{
+	struct ubus_auto_conn *conn = container_of(timeout, struct ubus_auto_conn, timer);
 
-	return ubus_complete_request(ctx, &req, 0);
+	if (ubus_connect_ctx(&conn->ctx, conn->path)) {
+		uloop_timeout_set(timeout, 1000);
+		fprintf(stderr, "failed to connect to ubus\n");
+		return;
+	}
+	conn->ctx.connection_lost = ubus_auto_disconnect_cb;
+	if (conn->cb)
+		conn->cb(&conn->ctx);
+	ubus_add_uloop(&conn->ctx);
 }
 
-static void ubus_default_connection_lost(struct ubus_context *ctx)
+void ubus_auto_connect(struct ubus_auto_conn *conn)
 {
-	if (ctx->sock.registered)
-		uloop_end();
+	conn->timer.cb = ubus_auto_connect_cb;
+	ubus_auto_connect_cb(&conn->timer);
 }
 
 struct ubus_context *ubus_connect(const char *path)
@@ -623,14 +347,7 @@ struct ubus_context *ubus_connect(const char *path)
 	if (!ctx)
 		return NULL;
 
-	ctx->sock.fd = -1;
-	ctx->sock.cb = ubus_handle_data;
-	ctx->connection_lost = ubus_default_connection_lost;
-
-	INIT_LIST_HEAD(&ctx->requests);
-	INIT_LIST_HEAD(&ctx->pending);
-	avl_init(&ctx->objects, ubus_cmp_id, false, NULL);
-	if (ubus_reconnect(ctx, path)) {
+	if (ubus_connect_ctx(ctx, path)) {
 		free(ctx);
 		ctx = NULL;
 	}
@@ -638,8 +355,17 @@ struct ubus_context *ubus_connect(const char *path)
 	return ctx;
 }
 
-void ubus_free(struct ubus_context *ctx)
+void ubus_shutdown(struct ubus_context *ctx)
 {
+	blob_buf_free(&b);
+	if (!ctx)
+		return;
 	close(ctx->sock.fd);
+	free(ctx->msgbuf.data);
+}
+
+void ubus_free(struct ubus_context *ctx)
+{
+	ubus_shutdown(ctx);
 	free(ctx);
 }