DNS Stateful Operations
draft-ietf-dnsop-session-signal-14

Document Type Active Internet-Draft (dnsop WG)
Last updated 2018-08-02
Replaces draft-bellis-dnsop-session-signal
Stream IETF
Intended RFC status Proposed Standard
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Stream WG state Submitted to IESG for Publication
Document shepherd Tim Wicinski
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IESG IESG state IESG Evaluation::Revised I-D Needed
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Has 2 DISCUSSes. Has enough positions to pass once DISCUSS positions are resolved.
Responsible AD Warren Kumari
Send notices to "Tim Wicinski" <tjw.ietf@gmail.com>
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DNSOP Working Group                                            R. Bellis
Internet-Draft                                                       ISC
Updates: 1035, 7766 (if approved)                            S. Cheshire
Intended status: Standards Track                              Apple Inc.
Expires: February 3, 2019                                   J. Dickinson
                                                            S. Dickinson
                                                                 Sinodun
                                                                T. Lemon
                                                     Nibbhaya Consulting
                                                             T. Pusateri
                                                            Unaffiliated
                                                         August 02, 2018

                        DNS Stateful Operations
                   draft-ietf-dnsop-session-signal-14

Abstract

   This document defines a new DNS OPCODE for DNS Stateful Operations
   (DSO).  DSO messages communicate operations within persistent
   stateful sessions, using type-length-value (TLV) syntax.  Three TLVs
   are defined that manage session timeouts, termination, and encryption
   padding, and a framework is defined for extensions to enable new
   stateful operations.  This document updates RFC 1035 by adding a new
   DNS header opcode and result code which has different message
   semantics.  This document updates RFC 7766 by redefining a session,
   providing new guidance on connection re-use, and providing a new
   mechanism for handling session idle timeouts.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on February 3, 2019.

Bellis, et al.          Expires February 3, 2019                [Page 1]
Internet-Draft           DNS Stateful Operations             August 2018

Copyright Notice

   Copyright (c) 2018 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
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   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Requirements Language . . . . . . . . . . . . . . . . . . . .   6
   3.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   6
   4.  Discussion  . . . . . . . . . . . . . . . . . . . . . . . . .  11
   5.  Applicability . . . . . . . . . . . . . . . . . . . . . . . .  12
   6.  Protocol Details  . . . . . . . . . . . . . . . . . . . . . .  12
     6.1.  DSO Session Establishment . . . . . . . . . . . . . . . .  12
       6.1.1.  Connection Sharing  . . . . . . . . . . . . . . . . .  14
       6.1.2.  Zero Round-Trip Operation . . . . . . . . . . . . . .  15
       6.1.3.  Middlebox Considerations  . . . . . . . . . . . . . .  16
     6.2.  Message Format  . . . . . . . . . . . . . . . . . . . . .  17
       6.2.1.  DNS Header Fields in DSO Messages . . . . . . . . . .  18
       6.2.2.  DSO Data  . . . . . . . . . . . . . . . . . . . . . .  20
       6.2.3.  EDNS(0) and TSIG  . . . . . . . . . . . . . . . . . .  25
     6.3.  Message Handling  . . . . . . . . . . . . . . . . . . . .  26
       6.3.1.  Error Responses . . . . . . . . . . . . . . . . . . .  27
     6.4.  Flow Control Considerations . . . . . . . . . . . . . . .  28
     6.5.  Responder-Initiated Operation Cancellation  . . . . . . .  28
   7.  DSO Session Lifecycle and Timers  . . . . . . . . . . . . . .  30
     7.1.  DSO Session Initiation  . . . . . . . . . . . . . . . . .  30
     7.2.  DSO Session Timeouts  . . . . . . . . . . . . . . . . . .  30
     7.3.  Inactive DSO Sessions . . . . . . . . . . . . . . . . . .  31
     7.4.  The Inactivity Timeout  . . . . . . . . . . . . . . . . .  33
       7.4.1.  Closing Inactive DSO Sessions . . . . . . . . . . . .  33
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