Re: Missing ABNF terms in 2821bis?
"Charles Lindsey" <[email protected]>
| Newsgroups | gmane.ietf.rfc822 |
|---|---|
| Message-ID | <[email protected]> |
In <p06250107c366c2d6fde2@[74.134.5.163]> Pete Resnick <[email protected]> writes: >So, going back to my original questions: >On 11/18/07 at 5:36 PM -0800, [email protected] wrote: >>[John Klensin wrote:] >>> >>>This is the one that affects 2821bis. The control characters cannot >>>appear in either IPv4 address or IPv6 address domain literals. They >>>can, in principle, appear in General Address literal, but those >>>require standards track action, etc., and one could easily cut them >>>off there. In other words, they are permitted in principle, but >>>prohibited in practice and are going to stay that way. It is >>>therefore probably safe to let this go. It would clearly be stupid for a future IPvn to use them, and it should be safe to assume that will not happen. The other issue, to be taken into account however is interoperability with Netnews (particularly insofar as these things also tuen up in <msg-id>s). >> >>Agreed. The issue is really with 2822. 2821's rules for defining new >>address literals offer sufficient protection IMO. >So you and John are saying that we should pull NO-WS-CTL out of dtext? +1 >Should we allow control characters in quoted-pair inside domain-literal? +1 >Should we allow quoted-pair at all in domain-literal? That one is slightly trickier, as there is less justification from a 2821/IPvn POV. But even there an IPvn that relied on them would be verging on stupidity, and the constraint placed upon future IPvn designers by forbidding them would be miniscule. But for Netnews interoperability there are still a messy problem, so: +1 >(Remember that they all appear in the obsolete (i.e., must be able to >handle for interpretation) syntax.) Of course. >The first is easy. The latter two are trickier, with the second one >giving me severe heartburn. A little sodium bicarbonate, perhaps :-). >So John, you are saying that we should leave NO-WS-CTL in quoted-string? I am neutral there, but they wouldn't be missed. -- Charles H. Lindsey ---------At Home, doing my own thing------------------------ Tel: +44 161 436 6131 Fax: +44 161 436 6133 Web: http://www.cs.man.ac.uk/~chl Email: [email protected] Snail: 5 Clerewood Ave, CHEADLE, SK8 3JU, U.K. PGP: 2C15F1A9 Fingerprint: 73 6D C2 51 93 A0 01 E7 65 E8 64 7E 14 A4 AB A5