Re: [dccp] DCCP specification updates

[Gorry Fairhurst <gorry at erg.abdn.ac.uk>]

This seems consistent with previous discussions.

Gorry


>> Hi all,
>> 
>> We have proofread the DCCP spec in detail for AUTH48, and have found a
>> number of technical nits.  There was one thing that I wanted to mention
>> explicitly before AUTH48 ends.
>> 
>> We propose to change the default value of the Allow Short Sequence
>> Numbers feature to 0.
>> 
>> Recap: DCCP sequence numbers can be either long (48 bits) or short (24
>> bits).  Short sequence numbers save header space, but leave connections
>> at greater risk for attack (and sequence number wrapping).
>> 
>> It seems like stack implementations should default to long sequence
>> numbers, since this is safe, and allow short sequence numbers only if a
>> connection is known to be data-limited.  We can indicate this in the
>> spec by setting Allow Short Seqnos's default to 0.
>> 
>> Quick comments OK.
>> 
>> Thanks,
>> Eddie
>>