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Re: Thinking about "branes" for netbsd...
On 5 May, 2012, at 17:55 , Darren Reed wrote:
> Dennis Ferguson wrote:
>> I'm aware of both of those. I think you may be confused about
>> what IP_BOUND_IF does (hint: last I looked it only effects
>> where multicasts and broadcasts go). IP_NEXTHOP does help if
>> you think this is solved by having each application do its
>> own routing (maybe the application could run DHCP to find out
>> the next hop for that interface's default route too); if all
>> applications did this then the kernel could get even simpler
>> by eliminating all forwarding tables.
> You want an application to send a packet back out the same
> interface that the packet was received on. That amounts to
> the application doing its own routing.
See RFC 1122, section 22.214.171.124, the Strong ES model. The routing
operation is well-defined, the application doesn't have to be
aware it is happening, but it needs a routing table per interface
to implement it.
This has reached the point of absurdity, however. I'm done.
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