so carp_output calls ether_output, which makes it pretty obvious that carp is
for ethernet only. ie, this diff is safe.
> On 10 Jan 2018, at 14:05, David Gwynne wrote:
>
> this copies the "valid interface" check from carp6_proto_input_if
> to carp_proto_input_if. the current check looks to see
this copies the "valid interface" check from carp6_proto_input_if
to carp_proto_input_if. the current check looks to see if the current
interface is carp, or if the current interface has any carps attached
to it. the carp6_proto_input_if check just checks if the current
interface is IFT_CARP or not
