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Re: [DNSOP] I-D Action: draft-ietf-dnsop-session-signal-02.txt

"Jan Komissar (jkomissa)" <jkomissa@cisco.com> Tue, 21 March 2017 19:34 UTC

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From: "Jan Komissar (jkomissa)" <jkomissa@cisco.com>
To: "dnsop@ietf.org" <dnsop@ietf.org>
Thread-Topic: [DNSOP] I-D Action: draft-ietf-dnsop-session-signal-02.txt
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Date: Tue, 21 Mar 2017 19:34:35 +0000
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Subject: Re: [DNSOP] I-D Action: draft-ietf-dnsop-session-signal-02.txt
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Hi,

I have one comment for this draft. In Section 3.3 Message Format, I would prefer that if a Session Signaling message is received where any of the section count fields are not zero, the receiver MUST respond with an error code, e.g. FORMERR, but MUST NOT terminate the connection. My reason is that in order to ignore any non-zero count fields, the receiving software must have code to walk all the sections and this code would effectively be useless, but would still have to be properly maintained. The soft error response is required to make it possible for a future client to probe servers for support for a future Session Signaling based feature that uses the RR sections.

Jan.


On 3/13/17, 7:44 PM, "DNSOP on behalf of internet-drafts@ietf.org" <dnsop-bounces@ietf.org on behalf of internet-drafts@ietf.org> wrote:

    
    A New Internet-Draft is available from the on-line Internet-Drafts directories.
    This draft is a work item of the Domain Name System Operations of the IETF.
    
            Title           : DNS Session Signaling
            Authors         : Ray Bellis
                              Stuart Cheshire
                              John Dickinson
                              Sara Dickinson
                              Allison Mankin
                              Tom Pusateri
    	Filename        : draft-ietf-dnsop-session-signal-02.txt
    	Pages           : 25
    	Date            : 2017-03-13
    
    Abstract:
       The EDNS(0) Extension Mechanism for DNS is explicitly defined to only
       have "per-message" semantics.  This document defines a new Session
       Signaling Opcode used to communicate persistent "per-session"
       operations, expressed using type-length-value (TLV) syntax, and
       defines an initial set of TLVs used to manage session timeouts and
       termination.
    
    
    The IETF datatracker status page for this draft is:
    https://datatracker.ietf.org/doc/draft-ietf-dnsop-session-signal/
    
    There's also a htmlized version available at:
    https://tools.ietf.org/html/draft-ietf-dnsop-session-signal-02
    
    A diff from the previous version is available at:
    https://www.ietf.org/rfcdiff?url2=draft-ietf-dnsop-session-signal-02
    
    
    Please note that it may take a couple of minutes from the time of submission
    until the htmlized version and diff are available at tools.ietf.org.
    
    Internet-Drafts are also available by anonymous FTP at:
    ftp://ftp.ietf.org/internet-drafts/
    
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