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From: Michael Wu <flamingice@sourmilk.net>
To: Johannes Berg <johannes@sipsolutions.net>
Cc: andy@warmcat.com, linux-wireless@vger.kernel.org
Subject: Re: [PATCH 0/4] Try #5: Radiotap on Monitor Mode interfaces for rx and tx
Date: Thu, 22 Mar 2007 19:10:30 -0400	[thread overview]
Message-ID: <200703221910.36705.flamingice@sourmilk.net> (raw)
In-Reply-To: <1174502809.3944.36.camel@johannes.berg>

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On Wednesday 21 March 2007 14:46, Johannes Berg wrote:
> If the driver does not support radiotap, ieee80211_rx_monitor needs to
> expand the head for each packet. Currently, this is also true, but since
> currently no non-management frames are sent down the management
> interface, this is not an issue. If each data packet needs to be first
> reallocated though, it quickly becomes a problem for low-power embedded
> access points running hostapd.
>
That's why drivers should be modified to support radiotap.

> Additionally, the overhead of tacking on radiotap headers to each
> received frame is also rather high if you're only interested in
> receiving the information for management frames.
>
It's really not that much overhead.

-Michael Wu

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      reply	other threads:[~2007-03-22 23:19 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-03-20 10:39 [PATCH 0/4] Try #5: Radiotap on Monitor Mode interfaces for rx and tx andy
2007-03-20 10:39 ` [PATCH 1/4] mac80211: Coding style cleanups andy
2007-03-21 18:58   ` Johannes Berg
2007-03-29 11:17     ` Andy Green
2007-03-20 10:39 ` [PATCH 2/4] mac80211: Add radiotap support for Monitor mode RX andy
2007-03-21 18:51   ` Johannes Berg
2007-03-22 23:18     ` Michael Wu
2007-03-23 13:44       ` Johannes Berg
2007-03-20 10:39 ` [PATCH 3/4] mac80211: Monitor mode radiotap injection docs andy
2007-03-21 18:15   ` Johannes Berg
2007-03-29 11:18     ` Andy Green
2007-03-29 11:26       ` Johannes Berg
2007-03-20 10:39 ` [PATCH 4/4] mac80211: Monitor mode radiotap-based packet injection andy
2007-03-21 18:28   ` Johannes Berg
2007-03-29 11:14     ` Andy Green
2007-03-29 11:19       ` Johannes Berg
2007-03-29 11:33         ` Andy Green
2007-03-29 11:48           ` Johannes Berg
2007-03-21 18:10 ` [PATCH 0/4] Try #5: Radiotap on Monitor Mode interfaces for rx and tx Johannes Berg
2007-03-22 22:58   ` Michael Wu
2007-03-23 14:01     ` Johannes Berg
2007-03-23  8:57   ` Andy Green
2007-03-23 13:57     ` Johannes Berg
2007-03-21 18:46 ` Johannes Berg
2007-03-22 23:10   ` Michael Wu [this message]

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