DNS-SD compatible service discovery in GRASP
draft-eckert-anima-grasp-dnssd-01

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ANIMA WG                                                       T. Eckert
Internet-Draft                                                    Huawei
Intended status: Standards Track                             Jul 1, 2018
Expires: January 2, 2019

              DNS-SD compatible service discovery in GRASP
                   draft-eckert-anima-grasp-dnssd-01

Abstract

   DNS Service Discovery (DNS-SD) defines the common framework for
   applications to announce and discover services.  This includes
   service names, service instance names, common parameters for
   selecting a service instance (weight, priority) as well as service
   specific parameters.

   GRASP is intended to also be used for service discovery.  Reinventing
   service discovery for GRASP with a similar set of fetures would
   result in duplication of work.  Therefore, this document defines how
   to use GRASP to announce and discover services in a way that inherits
   DNS-SD features and also tries to be compatible in spirit as much as
   possibel while still maintaining the intended simplicity of GRASP.

   The goal of this document is to permit defining service and their
   parameters once and then use that in GRASP, mDNS and (unicast) DNS.
   Future work can also define DNS-SD <-> GRASP gateway functions.

   In support of service discovery, this document also defines name
   discovery and schemes for reuseable elements in GRASP objectives
   which are designed to be extensible so that future work that
   identifies elements required across multiple objectives do not need
   to define a scheme how to do this.

Status of This Memo

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   provisions of BCP 78 and BCP 79.

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Eckert                   Expires January 2, 2019                [Page 1]
Internet-Draft              DNS-SD via GRASP                    Jul 2018

   This Internet-Draft will expire on January 2, 2019.

Copyright Notice

   Copyright (c) 2018 IETF Trust and the persons identified as the
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Table of Contents

   1.  Overview  . . . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Specification (Normative) . . . . . . . . . . . . . . . . . .   4
     2.1.  Service and Name Objectives . . . . . . . . . . . . . . .   4
     2.2.  Objective Value Reuseable Elements Structure  . . . . . .   4
     2.3.  Reuseable Elements  . . . . . . . . . . . . . . . . . . .   6
       2.3.1.  Sender Loop Count . . . . . . . . . . . . . . . . . .   6
       2.3.2.  Service Element . . . . . . . . . . . . . . . . . . .   6
       2.3.3.  Name Element  . . . . . . . . . . . . . . . . . . . .   9
   3.  Explanations (Informative)  . . . . . . . . . . . . . . . . .  11
     3.1.  Using GRASP service announcements . . . . . . . . . . . .  11
     3.2.  Further comparison with DNS-SD  . . . . . . . . . . . . .  13
     3.3.  Open Issues . . . . . . . . . . . . . . . . . . . . . . .  13
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .  14
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  14
   6.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  15
   7.  Change log [RFC Editor: Please remove]  . . . . . . . . . . .  15
     7.1.  01 -  . . . . . . . . . . . . . . . . . . . . . . . . . .  15
     7.2.  00 - Initial version  . . . . . . . . . . . . . . . . . .  15
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  15
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .  15
     8.2.  Informative References  . . . . . . . . . . . . . . . . .  15
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  15

1.  Overview

   DNS Service Discovery (DNS-SD) defines the common framework for
   applications to announce and discover services.  This includes
   service names, service instance names, common parameters for
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