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Re: [Proposal]TX flags

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On Wed, Mar 24, 2010 at 8:43 PM, Pavel Roskin <proski@xxxxxxx> wrote:
> On Wed, 2010-03-24 at 20:15 +0900, Bruno Randolf wrote:
>> On Wednesday 24 March 2010 00:50:31 Michael Stahn wrote:
>> > > similar to this we would also need to be able to specify that the beacon
>> > > TSF should not be overwritten. maybe a general flag like "do not change"
>> > > would do?
>> >
>> > Is TSF really overwritten at manual injection from userspace?
>>
>> Yes, it is, at least on ath5k. And as jouni has pointed out recently this
>> behaviour is expected by hostapd (maybe not for beacons but for probe
>> request/response frames, i dont know).
>>
>> Gabor Stefanik proposed a while ago that frames should only be modified by the
>> driver in cooked monitor mode (COOK_FRAMES), that way we could avoid defining
>> new radiotap flags. What's your view on that, Jouni?
>
> Maybe we could create a socket option that would put a _socket_ into a
> cooked monitor mode?  A "monitor mode socket" would accept and transmit
> packets with radiotap and 802.11 headers and receive the packets that
> the interface already receives, also with radiotap and 802.11 headers.
> That interface could be optimized for use with hostapd and other similar
> programs.  The driver could fill some data from the interface settings.
>
> The monitor mode, on the other hand, could be optimized for the
> "hardcore" stuff when the driver interferes as little as possible.  Then
> no special flags would be needed to pass the frame as is.
>
> --
> Regards,
> Pavel Roskin
>

I don't think that is needed, as we already support multiple monitor
interfaces (including a situation where some are cooked, others are
raw).

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