Ethernet NIC drivers depending unconditionally on INET

Andrew Gallatin gallatin at
Fri Jun 12 17:43:53 UTC 2009

Bjoern A. Zeeb wrote:
> On Fri, 12 Jun 2009, Navdeep Parhar wrote:
>> On Fri, Jun 12, 2009 at 10:56:31AM +0000, Bjoern A. Zeeb wrote:
>>> On Fri, 12 Jun 2009, Pyun YongHyeon wrote:
>>> Hi,
>>>> Yeah, there are no checksum offloading support for IPv6 under
>>>> FreeBSD so there are no cases the frames are IPv6 when
>>> The thing that scared me was sys/netinet/tcp_subr.c:tcp_maxmtu6().
>>> What I had missed was the CSUM_TSO6  (the 6 at the end) part.
>>> grepping through the tree I am even wondering a lot more now when I
>>> see what cxgb(4) is doing with that;)
>> I can't find a CSUM_TSO6 in head, did you mean IFCAP_TSO6?
> yes I did.
>> cxgb(4)
>> will not let you enable IFCAP_TSO6 on the interface.  It has always
>> been disallowed as far as I can tell.
> Yes, you have it in the logic bu you define it to 0;)
>     #define IFCAP_TSO6 0x0

So I guess TSO6 has never been tested at all on any interface on
Freebsd.  Is this true?


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