[haiku-gsoc] Re: Fwd: Re: [HCD08] ICMP error handling & propagation project
- From: <philippe.houdoin@xxxxxxx>
- To: haiku-gsoc@xxxxxxxxxxxxx
- Date: Mon, 21 Jul 2008 14:49:00 +0200
Hi guys,
>> 5. So icmp_error_reply(...) should generate the response datagram and
> use send_data() to reply to the target
>> protocol? What's more, here we face the IP header missing problem. I
> want to confirm this: are we going to add
>> an extra ipv4_header field in the net_buffer struct? And will this bring
> any side-effect?
>
> If it's not possible to rebuild the header on the fly, there is probably
> little else we can do about this. So even if we might come up with a better
> idea later, I think you should just do that now -- but since the net_buffer
> is protocol agnostic, it must be a void* pointer, it cannot be a real
> struct inside; maybe only remember those values that you need to rebuild
> the header again.
Another solution would be that IPv4 module (and any other domain "root"
protocol) keep a cache of recent headers...
- Philippe
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