It might be appropriate to change it from pkt_type to a flag indicating
that a timestamp should be added at TX time "add_timestamp". This may
well also end up being used for beacons too on hardware where the
beacons are completely software generated.

Simon 

-----Original Message-----
From: Johannes Berg [mailto:[EMAIL PROTECTED] 
Sent: Friday, August 18, 2006 7:51 AM
To: Jouni Malinen
Cc: netdev@vger.kernel.org; Simon Barber; Jiri Benc
Subject: Re: [clarification request] ieee80211_tx_control.pkt_type

On Fri, 2006-08-18 at 07:33 -0700, Jouni Malinen wrote:

> Some hardware designs require this configuration for TX frames. It is 
> used to select whether some of the fields are being filled in hardware

> (e.g., timestamp for Probe Response).

Ah ok, timestamp makes sense.

> This would only be needed for AP
> mode and IBSS (adhoc), so it is possible that not all low-level 
> dirvers have yet been implemented to support such operation.

Right.

> This pkt_type was added at generic 802.11 layer in order to avoid 
> forcing the low-level driver to even look at the 802.11 header when 
> queuing the frame for transmission. Taken into account how simple 
> operation it is to get the type and subtype from the frame control 
> field, this tx ctrl pkt_type could be removed, if desired. However, it

> was added there for a reason.

No, that's ok, I was just wondering why it is there at all.

Thanks for clarifying,
johannes
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