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 proposed api (ver 0.2) Date: Wed, 5 May 2010 12:55:09 +0200 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Message-Id: <201005051255.09394.jcaden@libresoft.es> Sender: linux-bluetooth-owner@vger.kernel.org List-ID: Hi all, Here is a new proposoal that tries to integrate all that have been comented and proposed in the list, as well as we talked yesterday on the IRC. There is still one thing that should be discussed, the fd passin issue. We think that we must talk about this and find the best way for the implementation as Elvis sugested. Regards. --------------------------------------- BlueZ D-Bus HDP API description *********************************** Health Device Profile hierarchy =============================== Service org.bluez Interface org.bluez.Hdp Object path [variable prefix]/{hci0,hci1,...} Methods object CreateSession(object path, dict config) Returns the object path for the new HDP session. The path parameter is the path of the remote object with the callbacks to nofity events (see org.bluez.HdpAgent at the end of this document) This petition starts an mcap session and also register in the SDP is needed Dict is defined as bellow: { "data_spec" : The data_spec is the data exchange specficication (see section 5.2.10 of the specification document), (optional) "end_points" : [{ (optional) "mdepid" : uint8, (optional) "role" : uint8, (mandatory) "specs" :[{ (mandatory) "dtype" : uint16, (mandatory) "description" : string, (optional) }] }] } if "data_spec" is not set, no SDP record will be registerd, so all the other data in the dictionary will be ignored Session will be closed by the call or implicitly when the programs leaves the bus. Possible errors: org.bluez.Error.InvalidArguments void DeleteSession(object path) Delete the HDP session identified by the object path. Also session will be closed if the procces that started it is removed from the D-Bus. Possible errors: org.bluez.Error.InvalidArguments org.bluez.Error.NotFound array remote_session_properties GetRemotesSessions() Returns an array with the remote session_properties of all the visible devices. remote_session_properties is a dictionary like: [{"session_id": a_session_identification (int or string, probably the SDP handler + btaddr) "data_spec" : the remote data spec, "end_points": ["mdepid": uint8, "role" : uint8, "specs" : [{ "dtype" : uint16, "description" : string, (optional) }] ] }] Note that only remotes with a SDP record will be notified by this function. -------------------------------------------------------------------------------- Service org.bluez Interface org.bluez.HdpSession Object path [variable prefix]/{hci0,hci1,...}/{hdp0,hdp1,...} object Connect(remote_session_id) Connects with the remote session and returns its object path. Possible errors: org.bluez.Error.InvalidArguments org.bluez.Error.HdpError void Disconnect(object device, boolean delete) Disconnect from the remote device. If delete is true, any status will also be deleted. Otherwise, the status will be keeped for allowing future reconnections. Possible errors: org.bluez.Error.InvalidArguments org.bluez.Error.NotFound org.bluez.Error.HdpError -------------------------------------------------------------------------------- Service org.bluez Interface org.bluez.HdpRemoteSession Object path [variable prefix]/{hci0,hci1,...}/{hdp0,hdp1,...}/rem_session_id boolean Echo(array{byte}) Sends an echo petition to the remote session. Return True if response matches with the buffer sended. If some error is detected False value is returned and the associated MCL is closed. uint16 OpenDc(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. Returns the data channel id. Possible errors: org.bluez.Error.InvalidArguments org.bluez.Error.HdpError file_descriptor GetDcFd(uint16 mdlid) Gets a file descriptor where data can be readed or writed for receive or sent by the data channel. Returns the file descriptor Possible errors: org.bluez.Error.InvalidArguments org.bluez.Error.NotFound org.bluez.Error.HdpError void DeleteDc(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.HdpError void DeleteAllDc() 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.HdpError uint16 FirstRelDc() Returns the identificator of the first reliable data channel (ERTM) connected for this device. Possible errors: org.bluez.Error.HdpError uint16 GetBestEfforDc() Returns the id of a best effort (streamming) data channel if any. Possible errors: org.bluez.Error.NotFound array getStatus() Returns an array with all the data channels available returned array: [uint16, ...] Possible errors: org.bluez.Error.NotFound HDPAgent hierarchy ================== (this object is implemented by the HDP client an receives notifications) Service unique name Interface org.bluez.HdpAgent Object path freely definable void DeviceConnected(object path) This method is called whenever a new device connection has been established over the control channel of the current HDP session. The objectpath contains the object path of the remote device. void DeviceDisconnected(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 CreatedDc(object path, uint16 mdlid, filedescriptor fd) This method is called when a new data channel is created The path contains the object path of the device whith the new connection is created, the mdlid the data channel identificator and the fd is the file descriptor where the data can be readed or writed. void DeletedDc(object path, uint16 mdlid) This method is called when a data channel is closed. After this call the data channel will not be valid and can be reused for future created data channels. void DataReady(object path, uint16 mdlid, filedescriptor fd) This method is called when there is new data that can be readed in a data channel void RemoteSession(dict remote_session_properties) This methos is called when a new session is discorevered in a remote device. See Hdp.GetRemotes to know how the dictionary is formed.