[ath9k-devel] 答复: Question: ieee80211_rx called twice after one ieee80211_subif_start_xmit call

[李刚 <gang.li@watchdata.com>]

> -----????-----
> ???: adrian.chadd at gmail.com [mailto:adrian.chadd at gmail.com] ?? Adrian
> Chadd
> ????: 2011?12?30? 17:31
> ???: ??
> ??: linux-wireless at vger.kernel.org; Ath9k Devel List
> ??: Re: Question: ieee80211_rx called twice after one
> ieee80211_subif_start_xmit call
> 
> 2011/12/30 ?? <gang.li@watchdata.com>:
> > Hi sirs,
> >
> >        Today, I noticed that when an data frame is sent by
> > ieee80211_subif_start_xmit, then ieee80211_rx will be called twice ,
first
> > is an Acknowledgement frame and second is the response data frame.  Is
this
> > the normal case?   It seems the RA frame is nonsense and just be freed
in
> > ieee80211_rx_monitor.
> >
> >        Is there anyway to tell the hardware not report RA frame to
> > mac80211?
> 
> .. its receiving ACKs? I thought it only did that when either promisc
> or control was enabled. Try fiddling around with the RX filter bitmask
> and see if you can determine (for your NIC :) which filter bit is
> doing it.
> 
> Maybe the interface is in promisc mode in hostap mode and this is why
> you're seeing ACKs.

Adrian? Thank you very much.

You reminded me that the RX filter is not correct, Yes, I almost forget that
I have changed the RX filter in ieee80211_configure_filter :

new_flags |= FIF_PROMISC_IN_BSS;

and the mode is STATION. 

What I want is to make two devices communicate directly without creating an
BSS or IBSS in advance, just using a wildcard BSSID instead.  But if setting
the RX flag as normal case 0 in STATION mode, the hardware can receive
noting. I don't know what's the matter. May be an BSSID must be set to the
hardware?  

> 
> 
> Adrian