From mboxrd@z Thu Jan  1 00:00:00 1970
From: Vladimir Kondratiev <vkondra@mail.ru>
Subject: Re: generic 802.11 stack
Date: Tue, 7 Sep 2004 21:41:54 +0300
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Cc: "David S. Miller" <davem@davemloft.net>
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On Tuesday 07 September 2004 21:08, David S. Miller wrote:
DS> On Tue, 7 Sep 2004 21:06:24 +0300
DS> Vladimir Kondratiev <vkondra@mail.ru> wrote:
DS>
DS> > May be I did not stated the question clearly. This information need to
 be DS> > specified per packet. So question ramains: how to specify PHY info
 per skb. DS>
DS> Use the skb->cb[] area, create:
DS>
DS> struct p80211_skb_cb {
DS>  int rate;
DS>  int channel;
DS>  /* whatever... */
DS> };
DS>
DS> #define P80211_SKB_CB(skb)  ((struct p80211_skb_cb *)((skb)->cb))

This should be done in generic way. This information used to communicate=20
berween particular driver and generic stack. For example, Rx PHY info and T=
x=20
status info should be used for in-stack generic rate scaling algorithm.

To complicate it a bit, cb[] is only 48 bytes long. PHY info may easily exc=
eed=20
this size, so it's better to allocate something and free it in destructor.

But again, point is this structure should be generic since it is used by=20
stack.

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