Native NAT Traversal Mode for the Host Identity Protocol
draft-ietf-hip-native-nat-traversal-16
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Ari Keränen
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Jan Melen
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Miika Komu
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2017-02-04
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HIP Working Group A. Keranen
Internet-Draft J. Melen
Intended status: Standards Track M. Komu, Ed.
Expires: August 8, 2017 Ericsson
February 4, 2017
Native NAT Traversal Mode for the Host Identity Protocol
draft-ietf-hip-native-nat-traversal-16
Abstract
This document specifies a new Network Address Translator (NAT)
traversal mode for the Host Identity Protocol (HIP). The new mode is
based on the Interactive Connectivity Establishment (ICE) methodology
and UDP encapsulation of data and signaling traffic. The main
difference from the previously specified modes is the use of HIP
messages for all NAT traversal procedures.
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 August 8, 2017.
Copyright Notice
Copyright (c) 2017 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
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
Keranen, et al. Expires August 8, 2017 [Page 1]
Internet-Draft HIP Native NAT Traversal Mode February 2017
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. Overview of Operation . . . . . . . . . . . . . . . . . . . . 6
4. Protocol Description . . . . . . . . . . . . . . . . . . . . 7
4.1. Relay Registration . . . . . . . . . . . . . . . . . . . 7
4.2. Transport Address Candidate Gathering . . . . . . . . . . 10
4.3. NAT Traversal Mode Negotiation . . . . . . . . . . . . . 12
4.4. Connectivity Check Pacing Negotiation . . . . . . . . . . 13
4.5. Base Exchange via HIP Relay Server . . . . . . . . . . . 14
4.6. Connectivity Checks . . . . . . . . . . . . . . . . . . . 17
4.6.1. Connectivity Check Procedure . . . . . . . . . . . . 17
4.6.2. Rules for Connectivity Checks . . . . . . . . . . . . 20
4.6.3. Rules for Concluding Connectivity Checks . . . . . . 22
4.7. NAT Traversal Alternatives . . . . . . . . . . . . . . . 23
4.7.1. Minimal NAT Traversal Support . . . . . . . . . . . . 23
4.7.2. Base Exchange without Connectivity Checks . . . . . . 23
4.7.3. Initiating a Base Exchange both with and without UDP
Encapsulation . . . . . . . . . . . . . . . . . . . . 24
4.8. Sending Control Packets after the Base Exchange . . . . . 25
4.9. Mobility Handover Procedure . . . . . . . . . . . . . . . 26
4.10. NAT Keepalives . . . . . . . . . . . . . . . . . . . . . 28
4.11. Closing Procedure . . . . . . . . . . . . . . . . . . . . 29
4.12. Relaying Considerations . . . . . . . . . . . . . . . . . 29
4.12.1. Forwarding Rules and Permissions . . . . . . . . . . 29
4.12.2. HIP Data Relay and Relaying of Control Packets . . . 30
4.12.3. Handling Conflicting SPI Values . . . . . . . . . . 31
5. Packet Formats . . . . . . . . . . . . . . . . . . . . . . . 31
5.1. HIP Control Packets . . . . . . . . . . . . . . . . . . . 32
5.2. Connectivity Checks . . . . . . . . . . . . . . . . . . . 32
5.3. Keepalives . . . . . . . . . . . . . . . . . . . . . . . 33
5.4. NAT Traversal Mode Parameter . . . . . . . . . . . . . . 33
5.5. Connectivity Check Transaction Pacing Parameter . . . . . 34
5.6. Relay and Registration Parameters . . . . . . . . . . . . 34
5.7. LOCATOR_SET Parameter . . . . . . . . . . . . . . . . . . 35
5.8. RELAY_HMAC Parameter . . . . . . . . . . . . . . . . . . 37
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