Re: [Softwires] 4rd-U informal meeting

2012/3/28 Simon Perreault <simon.perreault@viagenie.ca>

> On 03/28/12 09:22, Tetsuya Murakami wrote:
>
>> In terms of CNP, CNP needs to be calculated every time if the packet
>> is toward to outside of domain because the embedded IPv4 address
>> could be different. So, I think there is no difference between CNP
>> and recalculation of L4 checksum from the implementation point of
>> view.
>>
>
> On the contrary, there is a big difference. The difference is that you are
> only concerned with L3. L4 can change: UDP, TCP, ICMP, STCP, DCCP, etc,
> etc, etc. You need a lot of code to handle all existing transport
> protocols, and you still can't handle future protocols that people might
> develop.
>

another FYI. RDP (RFC908, RFC1151) has different layout other than TCP/UDP.
anyway a special process is needed for it. "you are only concerned with L3"
is a mystery.

thanks,
maoke

>
> Checksum neutrality is a *big* advantage.
>
>
> Simon
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Re: [Softwires] 4rd-U informal meeting - Tuesday 15:15 Room 204