Re: Deactivating TCP checksumming

[Dennis Cook]

What I was looking for is a general capability to keep the SW transport
stack from
computing outgoing TCP/UDP/IP checksums so that the HW can be allowed to do
it,
similar to Windows checksum offload capability.

"Jeff Garzik" <[e-mail]> wrote in message
news:[e-mail]...
> On Wed, Apr 02, 2003 at 02:22:59PM -0500, Dennis Cook wrote:
> > Using RH Linux kernel 2.4.18, setting "features" bit NETIF_F_IP_CSUM
does
> > not appear
> > to keep a valid IP checksum from being computed in packets presented to
my
> > driver
> > for transmission. So having HW compute outgoing checksum buys nothing.
>
> You are not using sendfile(2), which is required to activate h/w csum.
>
> Jeff
>
>
>