Re: draft-ietf-sip-ipv6-abnf-fix-04

No, I don't think trying to make that syntax change is appropriate for  
this draft at this point
in its life-cycle.

RjS

On Jan 29, 2010, at 2:40 PM, Vijay K. Gurbani wrote:

> Robert: Please see question directed to you at the end of this
> email.
>
> Dale Worley wrote:
>> As long as we're explicating the syntax, it seems reasonable to
>> enunciate what "everybody knows" about its interpretation.
>
> Dale: I am not being an obstructionist here, so please
> do not take the comments as such.
>
> I believe that "everybody knows" that dotted-decimal is
> well, dotted-"decimal" and not dotted-"octal".  The fact
> that some C libraries interpret the leftmost 0 as a
> hint to enter octal mode is unfortunate, but I don't see
> how putting admonitions here will solve that particular
> problem.
>
> That said, one quick observation is that the production rule for
> <IPv4address> literal defined in rfc3986 is more close
> to your intent than the one defined in rfc3261.  More
> specifically, here they are:
>
> rfc3986:
>
> A host identified by an IPv4 literal address is represented in
> dotted-decimal notation (a sequence of four decimal numbers in the
> range 0 to 255, separated by "."), as described in [RFC1123] by
> reference to [RFC0952].  Note that other forms of dotted notation may
> be interpreted on some platforms, as described in Section 7.4, but
> only the dotted-decimal form of four octets is allowed by this
> grammar.
>
>   IPv4address = dec-octet "." dec-octet "." dec-octet "." dec-octet
>
>   dec-octet   = DIGIT                 ; 0-9
>               / %x31-39 DIGIT         ; 10-99
>               / "1" 2DIGIT            ; 100-199
>               / "2" %x30-34 DIGIT     ; 200-249
>               / "25" %x30-35          ; 250-255
>
> rfc3261:
>
> IPv4address    =  1*3DIGIT "." 1*3DIGIT "." 1*3DIGIT "." 1*3DIGIT
>
> So, we could deprecate the existing rfc3261 syntax for IPv4address
> and replace it with the one for rfc3986.
>
> Robert: Is this okay with you?  If so, I can put the above change
> in the draft as well.
>
> Thanks,
>
> - vijay
> -- 
> Vijay K. Gurbani, Bell Laboratories, Alcatel-Lucent
> 1960 Lucent Lane, Rm. 9C-533, Naperville, Illinois 60566 (USA)
> Email: vkg@{alcatel-lucent.com,bell-labs.com,acm.org}
> Web:   http://ect.bell-labs.com/who/vkg/

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