* CPU instruction to calculate tcp checksum and udp integrity?
@ 2011-05-23 15:26 Jon Zhou
2011-05-26 2:57 ` Peter Teoh
0 siblings, 1 reply; 2+ messages in thread
From: Jon Zhou @ 2011-05-23 15:26 UTC (permalink / raw)
To: kernelnewbies
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
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* CPU instruction to calculate tcp checksum and udp integrity?
2011-05-23 15:26 CPU instruction to calculate tcp checksum and udp integrity? Jon Zhou
@ 2011-05-26 2:57 ` Peter Teoh
0 siblings, 0 replies; 2+ messages in thread
From: Peter Teoh @ 2011-05-26 2:57 UTC (permalink / raw)
To: kernelnewbies
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@jdsu.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 at kernelnewbies.org
> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>
>
--
Regards,
Peter Teoh
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