Re: Proposed API for HDP

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Hi José,

* José Antonio Santos Cadenas <santoscadenas@xxxxxxxxx> [2010-07-08 19:12:31 +0200]:

<snip>

> 
> Service		org.bluez
> Interface	org.bluez.HealthDeviceApplication
> Object path	[variable prefix]/{hci0,hci1,...}/dev_XX_XX_XX_XX_XX_XX/hdp_YYYY
> 
> Methods:
> 
> 	array GetProperties()
> 
> 		Gets the information of the remote application published on its
> 		SDP record. The returned data format is as follows:
> 
> 		{
> 			"end_points": [
> 				"mdepid": uint8,
> 				"role"  : "source" or "sink" ,
> 				"specs" : [{
> 					"dtype"       : uint16,
> 					"description" : string, (optional)
> 					}]
> 				]
> 		}
> 
> 	object Connect(path local_application_id)
> 
> 		Connects the local application with the remote application.
> 
> 		Only the bus client that created the local session will be able
> 		to create connections using it.
> 
> 		If the Device is already connected with an other application an
> 		org.bluez.Error.AlreadyConnected error will be received.
> 
> 		Possible errors: org.bluez.Error.InvalidArguments
> 				org.bluez.Error.AlreadyConnected
> 				org.bluez.Error.HealthError
> 
> 	void Disconnect()
> 
> 		Disconnect from the remote application the state will also be
> 		deleted. And no future reconnections will be possible. For
> 		keeping the state the method Pause of the health link should be
> 		used.
> 
> 		Possible errors: org.bluez.Error.InvalidArguments
> 				org.bluez.Error.NotFound
> 				org.bluez.Error.HealthError
> 
> 	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.
> 
> 	path OpenDataChannel(byte mdepid, string conf)
> 
> 		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 using one of this values "reliable", "streaming", "any".
> 
> 		Returns the data channel path.
> 
> 		Possible errors: org.bluez.Error.InvalidArguments
> 				org.bluez.Error.HealthError
> 
> 	void ReconnectDataChannel(path data_channel)
> 
> 		Reconnects a previously created data channel indicated by its
> 		path.
> 
> 		Possible errors: org.bluez.Error.InvalidArguments
> 				org.bluez.Error.HealthError
> 				org.bluez.Error.NotFound

So are we really going to expose the temporally disconnect and
reconnection to the applicantion level? The application should not
care if the data channel is there or not.

> 
> 	int GetDataChannelFileDescriptor(path data_channel)
> 
> 		Gets a file descriptor where data can be read or written.
> 
> 		Possible errors: org.bluez.Error.InvalidArguments
> 				org.bluez.Error.NotFound
> 				org.bluez.Error.HealthError

What about the fd-passing feature of D-Bus here?


-- 
Gustavo F. Padovan
http://padovan.org
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