Basic Socket Interface Extensions for the Host Identity Protocol (HIP)
RFC 6317

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Internet Engineering Task Force (IETF)                           M. Komu
Request for Comments: 6317                              Aalto University
Category: Experimental                                      T. Henderson
ISSN: 2070-1721                                       The Boeing Company
                                                               July 2011

                 Basic Socket Interface Extensions for
                    the Host Identity Protocol (HIP)

Abstract

   This document defines extensions to the current sockets API for the
   Host Identity Protocol (HIP).  The extensions focus on the use of
   public-key-based identifiers discovered via DNS resolution, but also
   define interfaces for manual bindings between Host Identity Tags
   (HITs) and locators.  With the extensions, the application can also
   support more relaxed security models where communication can be non-
   HIP-based, according to local policies.  The extensions in this
   document are experimental and provide basic tools for further
   experimentation with policies.

Status of This Memo

   This document is not an Internet Standards Track specification; it is
   published for examination, experimental implementation, and
   evaluation.

   This document defines an Experimental Protocol for the Internet
   community.  This document is a product of the Internet Engineering
   Task Force (IETF).  It represents the consensus of the IETF
   community.  It has received public review and has been approved for
   publication by the Internet Engineering Steering Group (IESG).  Not
   all documents approved by the IESG are a candidate for any level of
   Internet Standard; see Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc6317.

Komu & Henderson              Experimental                      [Page 1]
RFC 6317              Basic API Extensions for HIP             July 2011

Copyright Notice

   Copyright (c) 2011 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
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   This document may contain material from IETF Documents or IETF
   Contributions published or made publicly available before November
   10, 2008.  The person(s) controlling the copyright in some of this
   material may not have granted the IETF Trust the right to allow
   modifications of such material outside the IETF Standards Process.
   Without obtaining an adequate license from the person(s) controlling
   the copyright in such materials, this document may not be modified
   outside the IETF Standards Process, and derivative works of it may
   not be created outside the IETF Standards Process, except to format
   it for publication as an RFC or to translate it into languages other
   than English.

Table of Contents

   1. Introduction ....................................................3
   2. Terminology .....................................................5
   3. Name Resolution Process .........................................5
      3.1. Interaction with the Resolver ..............................5
      3.2. Interaction without a Resolver .............................6
   4. API Syntax and Semantics ........................................7
      4.1. Socket Family and Address Structure Extensions .............7
      4.2. Extensions to Resolver Data Structures .....................9
      4.3. The Use of getsockname() and getpeername() Functions ......12
      4.4. Selection of Source HIT Type ..............................12
      4.5. Verification of HIT Type ..................................13
      4.6. Explicit Handling of Locators .............................14
   5. Summary of New Definitions .....................................16
   6. Security Considerations ........................................16
   7. Contributors ...................................................17
   8. Acknowledgments ................................................17
   9. References .....................................................17
      9.1. Normative References ......................................17
      9.2. Informative References ....................................18

Komu & Henderson              Experimental                      [Page 2]
RFC 6317              Basic API Extensions for HIP             July 2011