Return-Path: From: =?iso-8859-1?q?Jos=E9_Antonio_Santos_Cadenas?= Reply-To: jcaden@libresoft.es To: linux-bluetooth@vger.kernel.org Subject: HDP API (version 0.6) Date: Thu, 20 May 2010 15:01:58 +0200 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Message-Id: <201005201501.59176.jcaden@libresoft.es> Sender: linux-bluetooth-owner@vger.kernel.org List-ID: Hi all, We tried to fit a little bit more with the BlueZ API reducing the number of objects and centring the connection and disconnection issues in the HealthDevice object. As was suggested previously in the list. Regards ------------ BlueZ D-Bus Health API description ********************************** Santiago Carot-Nemesio Jos? Antonio Santos-Cadenas Elvis Pf?tzenreuter Health Device Profile hierarchy =============================== Service org.bluez Interface org.bluez.HealthAdapter Object path [variable prefix]/{hci0,hci1,...} Methods: uint32 CreateInstance(object path, dict config) Returns the id of the new created instance. The path parameter is the path of the remote object with the callbacks to notify events (see org.bluez.HealthAgent at the end of this document) This petition starts an mcap instance and also register in the SDP if is needed. Dict is defined as bellow: { "data_spec" : The data_spec is the data exchange specification (see section 5.2.10 of the specification document) possible values: 0x00 = reserved, 0x01 [IEEE 11073-20601], 0x02..0xff reserved, (optional) "end_points" : [{ (optional) "mdepid" : uint8, (optional) "role" : ("source" or "sink"), (mandatory) "specs" :[{ (mandatory) "data_type" : uint16, (mandatory) "description" : string, (optional) }] }] } if "data_spec" is not set, no SDP record will be registered, so all the other data in the dictionary will be ignored. Instance will be closed by the call or implicitly when the programs leaves the bus. Possible errors: org.bluez.Error.InvalidArguments void CloseInstance(uint32 ) Closes the HDP instance identified by the object path. Also instance will be closed if the process that started leaves the bus. If there is a SDP record associated to this instance it will be removed. Possible errors: org.bluez.Error.InvalidArguments org.bluez.Error.NotFound -------------------------------------------------------------------------------- Service org.bluez Interface org.bluez.HealthDevice Object path [variable prefix]/{hci0,hci1,...}/dev_XX_XX_XX_XX_XX_XX Methods: array GetHealthInstances() Gets the information of the remote instances present in this device and published on its SDP record. The returned data follows this format. [{"id": uint32, "data_spec" : data spec, "end_points": ["mdepid": uint8, "role" : "source" or "sink" , "specs" : [{ "dtype" : uint16, "description" : string, (optional) }] ] }]; object Connect(uint32 local_instance_id, uint32 remote_instance_id) Connects the local instance with the remote instance and returns the path of the HealthLink object. You should get the remote instance id running GetHealthInstances. Only the bus client that created the local session will be able to create connections using it. Possible errors: org.bluez.Error.InvalidArguments org.bluez.Error.HealthError void Disconnect(object link, boolean cache) Disconnect from the link. If cache is false, state will also be deleted. Otherwise, the state will be kept for allowing future reconnections until the adapter holding the local session is removed. Possible errors: org.bluez.Error.InvalidArguments org.bluez.Error.NotFound org.bluez.Error.HealthError -------------------------------------------------------------------------------- Service org.bluez Interface org.bluez.HealthLink Object path [variable prefix]/{hci0,hci1,...}/{hdp0,hdp1,...}/rem_inst_id Methods: boolean Echo(array{byte}) Sends an echo petition to the remote intance. Returns True if response matches with the buffer sent. If some error is detected False value is returned and the associated MCL is closed. uint16 OpenDataChannel(byte mdepid, byte config) Creates a new data channel with the indicated config to the remote MCAP Data End Point (MDEP). The configuration should indicate the channel quality of service. In the current version of HDP, valid values are 0x01 for reliable channels and 0x02 for streaming data channel. Returns the data channel id. Possible errors: org.bluez.Error.InvalidArguments org.bluez.Error.HealthError array GetDataChannelFileDescriptor(uint16 mdlid) Gets a file descriptor where data can be read or written for receive or sent by the data channel. Returns an array of file descriptors one for write and other for read. Possible errors: org.bluez.Error.InvalidArguments org.bluez.Error.NotFound org.bluez.Error.HealthError void DeleteDataChannel(uint16 mdlid) Deletes a data channel so it will not be available for use. Possible errors: org.bluez.Error.InvalidArguments org.bluez.Error.NotFound org.bluez.Error.HealthError void DeleteAllDataChannels() Deletes all data channels so it will not be available for use. Typically this function is called when the connection with the remote device will be closed permanently Possible errors: org.bluez.Error.HealthError dict GetDataChannelStatus() Return a dictionary with all the data channels that can be used to send data right now. The dictionary is formed like follows: { "reliable": [mdlid_r1, mdlid_r2, ...], "streaming" : [mdlid_s1, mdlid_s2, ...] } The fist reliable data channel will always be the first data channel in reliable array. HealthAgent hierarchy ===================== (this object is implemented by the HDP user in order to receive notifications) Service unique name Interface org.bluez.HealthAgent Object path freely definable Methods: void LinkConnected(object path) This method is called whenever a new connection has been established over the control channel of the current HDP instance. The object path paremeter contains the object path of the created HealthLink. void LinkDisconnected(object path) This method is called when a remote device is disconnected definitively. Any future reconnections will fail. Also all data channels associated to this device will be closed. void CreatedDataChannel(object path, uint16 mdlid, byte conf) This method is called when a new data channel is created The path contains the object path of the HealthLink where the new connection is created, the mdlid is the data channel identificator and conf is the que quality of service of the data channel (0x01 reliable, 0x02 streaming). void DeletedDataChannel(object path, uint16 mdlid) This method is called when a data channel is closed. After this call the data channel id will not be valid and can be reused for future created data channels.