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[Xen-devel] Re: [1/4] [NET] back: Fix maximum fragment check

On Sat, Jul 01, 2006 at 09:24:13AM +0100, Keir Fraser wrote:
> I'm uncomfortable with this, even though it makes things a little 
> easier now. For sanity I want to see netfront/netback explicitly grok 
> flags rather than dumbly pass them through. I'd prefer uint8_t protocol 
> and uint8_t flags. Former is a protocol enumeration; latter is unused 
> now but we can add ECN and so on later. By the way: will we need 


> netback to advertise support for the ECN flag? I'm not sure exactly 
> what it will mean, and whether it can just be ignored by netbacks that 
> don't support it?

If netback does not advertise the flag then netfront will perform
segmentation before passing TCP packets with CWR set through.

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