Small patch to multicast code...

[gnn at FreeBSD.org]

At Fri, 22 Aug 2008 22:43:39 +0100,
Bruce M. Simpson wrote:
> 
> gnn at FreeBSD.org wrote:
> > Somehow the data that the device needs to do the proper checksum
> > offload is getting trashed here.  Now, since it's clear we need a
> > writable packet structure so that we don't trash the original, I'm
> > wondering if the m_pullup() will be sufficient.
> >   
> 
> If it's serious enough to break UDP checksumming on the wire, perhaps we 
> should just swallow the mbuf allocator heap churn and do the m_dup() for 
> now, but slap in a big comment about why it's there.

I think if none of us finds a better way before early next week that's
what I'll do so that this at least works in 7.1.

Best,
George