netdev - Re: CPU instruction to calculate tcp checksum and udp integrity?

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Message-ID: <BANLkTimtRFFNWthCN1ziLtuNvFYAi0WHGg@mail.gmail.com>
Date:	Thu, 26 May 2011 10:57:28 +0800
From:	Peter Teoh <htmldeveloper@...il.com>
To:	Jon Zhou <Jon.Zhou@...u.com>
Cc:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"kernelnewbies@...nelnewbies.org" <kernelnewbies@...nelnewbies.org>
Subject: Re: CPU instruction to calculate tcp checksum and udp integrity?

In net/ipv4/tcp_ipv4.c:

/* This routine computes an IPv4 TCP checksum. */
void tcp_v4_send_check(struct sock *sk, struct sk_buff *skb)
{
        struct inet_sock *inet = inet_sk(sk);

        __tcp_v4_send_check(skb, inet->inet_saddr, inet->inet_daddr);
}
EXPORT_SYMBOL(tcp_v4_send_check);

On Mon, May 23, 2011 at 11:26 PM, Jon Zhou <Jon.Zhou@...u.com> wrote:
> hi
> now I am using sw to calculate the tcp checksum, is there CPU(nehalem)
> instruction or NIC /kernel API to do such thing?
>
> thanks a lot
> jon
>
>
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies@...nelnewbies.org
> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>
>

-- 
Regards,
Peter Teoh
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