Subject: Re: Useless networking code in 2.4.x ?

From: "David S. Miller" <[email-masked]>
Date: Thu, 23 Oct 2003 03:31:00 -0700

On Thu, 23 Oct 2003 10:58:01 +0200 (CEST)
an7 <[email-masked]> wrote:

> If we have a look at tcp_recv_skb, and
> tcp_read_sock(),
>
> we notice that there is a SYN check, and if the flag
> is on, we do offset-- (sequence number not
> corresponding to real data byte). 
>
> This Syn check is useless, as the function cannot be
> called at the beginning of a connection (since we have
> not copied_seq filled with the last sequence number of
> the last packet passed to the upper layer)
> 
> What do you think of that ?

Please next time, take this kind of question to [email-masked]
where the networking developers are, most of them are not subscribed
to linux-kernel.

As to your question, if we ever support accepting data in the
initial final SYN-ACK packet, this code would be needed, so it's
better to keep this code around.