netdev - Re: TCP_SKB_CB(skb)->flags = iph->tos ?

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Date:	Wed, 04 Jun 2008 15:26:07 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	opurdila@...acom.com
Cc:	netdev@...r.kernel.org
Subject: Re: TCP_SKB_CB(skb)->flags = iph->tos ?

From: Octavian Purdila <opurdila@...acom.com>
Date: Fri, 30 May 2008 23:53:56 +0300

> 
> tcp_v4_rcv says: TCP_SKB_CB(skb)->flags = iph->tos;
> 
> I am probably missing something obvious, but shouldn't flags be initialized 
> with the TCP headers instead of the IP TOS value?

On packet output ->flags holds the TCP header flags, on packet input
it holds the TOS field for testing ECN flags.

You could have had a look at how the ->flags field is used on TCP
output vs. TCP input processing to get a better idea of what might be
going on here.

That's exactly how I figured it out, I didn't know the answer either,
but constantly I'm doing simple searches for people and learning the
code for other people it seems even when I really don't even have
the time to do so :-/
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