Hi Antti, On Fri, Sep 9, 2011 at 11:36 AM, Antti Julku <antti.julku@xxxxxxxxx> wrote: > > Hello Bluetooth experts, > > Name resolution of older devices not supporting EIR is still missing from > the management interface. I discussed with Johan, and he suggested the > following architecture (if I understood correctly): > > New command and event are added to mgmt interface: > * Unknown Names Event > * Resolve Names Command > > When device discovery is completed, kernel sends list of BT addresses of > devices which names are unknown (no name in EIR data) with Unknown Names > Event. Does it worth to parse the EIR data twice(kernel and userspace)? My suggestion is to remove the Unknown Names Event and add the Resolve Names Command only. No matter the decision, we need to evaluate how to map the discovering session properly, I mean how to sync kernel and userspace events and signals. One think that it is not clear to me: does name resolution belongs to discovery procedure? I am not talking about the SPEC, it is more how we define the concept in BlueZ. Should bluetoothd send "Discovering=false" after finishing all name resolution or when inquiry finishes? After clarifying this last question, I think it will be easier to define which mgmt events will be necessary. > > User space can then request name resolving with Resolve Names Command, which > takes list of BT addresses as parameter. User space gets a Remote Name Event > for each device. > > Internally kernel would have a list of found devices, to which devices are > added during discovery. Device in the list is flagged as unknown unless > there was name for it in EIR data. After discovery is completed, event with > list of unknown devices is sent, and the found devices list is cleared (it's > valid only during one discovery session). > > Not sure if name resolution should be included in the discovery session done > via mgmt interface (while Discovering Event indicates discovery is ongoing), > and how to track discovery state in that case. Maybe another state is needed > in hdev->flags (e.g. HCI_DISCOVERY) if HCI_INQUIRY is not enough? The userspace needs to decide if name resolution is required based on NameResolving(main.conf) and entries found in the storage(/var/lib/bluetooth/.../names). Another hdev->flags? I am afraid that Marcel will be against it. BR, Claudio > > Any opinions? I think it would be good to have wider discussion before > making patches. > > Br, > Antti > > -- > To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" > in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
