Re: RE: AD comments on draft-ietf-rohc-tcp-15

Hi,

Magnus Westerlund wrote:
> Kristofer Sandlund (LU/EAB) skrev:
>> Hi,
>>
>> although it has been ignored in the past ROHC specifications, I agree 
>> with Magnus point. But as Mark stated, this will _usually_ be
>> checked by the receiving interface. Maybe we can re-phrase the text a
>> bit
>> so that we don't say that the _compressor_ has to verify the checksum 
>> and instead write that:
>>    "...MUST NOT compress packets with an invalid IPv4 checksum"
>> That way, most deployments won't have to do anything as the compressor
>> will
>> know that the checksum has already been verified by another layer and we
>> don't risk breaking compression transparency.
>>

Before you go ahead with this change, I just want to remind you that a 
packet with an incorrect IPv4 checksum can be compressed transparently 
with the uncompressed profile.

/Calle

>> /Kristofer
> 
> This sounds like a fine rewording to me. I would also suggest that you 
> qualify this with explicitly stating the assumption that the receiving 
> interface of the device the compressor is running on will perform this 
> check.
> 
> Cheers
> 
> Magnus Westerlund
> 
> IETF Transport Area Director & TSVWG Chair
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