Re: [Anima-signaling] Comments needed: issues in draft-ietf-anima-grasp-09
Brian E Carpenter <brian.e.carpenter@gmail.com> Fri, 03 March 2017 01:52 UTC
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To: Michael Richardson <mcr+ietf@sandelman.ca>, Anima signaling DT <anima-signaling@ietf.org>
References: <eaec437b-db19-a0a5-3190-21b9a457d16d@gmail.com> <15000.1488464147@obiwan.sandelman.ca>
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
Organization: University of Auckland
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Date: Fri, 03 Mar 2017 14:52:36 +1300
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Subject: Re: [Anima-signaling] Comments needed: issues in draft-ietf-anima-grasp-09
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On 03/03/2017 03:15, Michael Richardson wrote: > > Brian E Carpenter <brian.e.carpenter@gmail.com> wrote: > > - Split the document? [Charlie Perkins] > > > "parts of the document seem more philosophical than > > prescriptive... It should be considered to break the document > > into a Requirements document and a more rigorously defined > > protocol solution document." > > > Proposed resolution: writing a separate requirements document > > was essentially excluded when the WG was chartered. Unless the > > WG and AD want to backtrack on that, the proposed resolution > > is to *not* do this. Of course, all the specific review comments > > about non-rigorous text will be actioned. > > Mark the parts of the document which are requirements. > not having seperate documents doesn't mean that we can't be clear. It's already a separate and suitably titled section. I think we're fine. > > > - Clarify security [Charlie Perkins] > > > "In some > > places, ACP seems to be mandated, and in other places that is relaxed > > to mean "a sufficient security mechanism". It would be better to > > identify the security requirements, and put them unmistakably in the > > Security Considerations section, which deserves to have teeth." > > > (and various detailed comments in the text) > > > Of course we will deal with the detailed comments. The larger > > issue is whether we should move most of the security discussion > > to the Security Considerations section. > > > Proposed resolution: *Waiting for WG Chair and AD guidance.* > > I think I already expressed my opinion: "must be secured by ACP". > I would like no other exceptions or allusions to DTLS, etc. I'm not convinced we have WG consensus for that. I think that when we've tightened up the text in several ways suggested by Charlie, at least the intention will be clear. > > > - Text on circular dependencies [Joel Halpern] > > ... > > Proposed resolution: We should be more explicit that this is a complex > > issue that is simply not handled by the GRASP layer and that must be > > considered by ASA designers. > > +1 > > > Proposed resolution: No change. > > > "3.8.13. No Operation Message > > > In fragmentary CDDL, a No Operation message follows the pattern: > > > noop-message = [M_NOOP] > > > This message MAY be sent by an implementation that for practical > > reasons needs to activate a socket. It MUST be silently ignored by a > > recipient. > > > CEP: ?? what does it mean to "activate" a socket? Is there something > > about > > how long a socket may remain open but not used?" > > > Not that I know of. But I discovered that to find out the port number > > assigned to a socket, you pretty much have to perform sendto() and > > getsockname(), so the ability to send a no-op during initialisation > > seemed reasonable. I could have just sent a zero, but a well-defined > > message seemed better. > > Also, we may need traffic to keep ACP links alive, or discovery that they are > in fact dead. Or just for debugging. It just seems useful to have to me. Yes. It only got added because I needed to send one to make my code work ;-). Brian
- [Anima-signaling] Comments needed: issues in draf… Brian E Carpenter
- Re: [Anima-signaling] Comments needed: issues in … Michael Richardson
- Re: [Anima-signaling] Comments needed: issues in … Brian E Carpenter