Re: [clarification request] ieee80211_tx_control.pkt_type

[Johannes Berg <johannes@sipsolutions.net>]

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