Sockets Application Program Interface (API) for Multihoming Shim
RFC 6316

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Internet Engineering Task Force (IETF)                           M. Komu
Request for Comments: 6316                              Aalto University
Category: Informational                                       M. Bagnulo
ISSN: 2070-1721                                                     UC3M
                                                               K. Slavov
                                                        S. Sugimoto, Ed.
                                                                Ericsson
                                                               July 2011

    Sockets Application Program Interface (API) for Multihoming Shim

Abstract

   This document specifies sockets API extensions for the multihoming
   shim layer.  The API aims to enable interactions between applications
   and the multihoming shim layer for advanced locator management, and
   access to information about failure detection and path exploration.

   This document is based on an assumption that a multihomed host is
   equipped with a conceptual sub-layer (hereafter called "shim sub-
   layer") inside the IP layer that maintains mappings between
   identifiers and locators.  Examples of the shim are Shim6 and the
   Host Identity Protocol (HIP).

Status of This Memo

   This document is not an Internet Standards Track specification; it is
   published for informational purposes.

   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/rfc6316.

Komu, et al.                  Informational                     [Page 1]
RFC 6316                  Multihoming Shim API                 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
   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.

   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. Requirements Language ...........................................4
   3. Terminology and Background ......................................4
   4. System Overview .................................................7
   5. Requirements ....................................................8
   6. Socket Options for Multihoming Shim Sub-Layer ..................10
      6.1. SHIM_ASSOCIATED ...........................................14
      6.2. SHIM_DONTSHIM .............................................15
      6.3. SHIM_HOT_STANDBY ..........................................16
      6.4. SHIM_LOC_LOCAL_PREF .......................................17
      6.5. SHIM_LOC_PEER_PREF ........................................18
      6.6. SHIM_LOC_LOCAL_RECV .......................................19
      6.7. SHIM_LOC_PEER_RECV ........................................20
      6.8. SHIM_LOC_LOCAL_SEND .......................................20
      6.9. SHIM_LOC_PEER_SEND ........................................22
      6.10. SHIM_LOCLIST_LOCAL .......................................23
      6.11. SHIM_LOCLIST_PEER ........................................25
      6.12. SHIM_APP_TIMEOUT .........................................26
      6.13. SHIM_PATHEXPLORE .........................................27

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