--- 1/draft-ietf-ipwave-ipv6-over-80211ocb-38.txt 2019-04-14 11:13:14.178505080 -0700 +++ 2/draft-ietf-ipwave-ipv6-over-80211ocb-39.txt 2019-04-14 11:13:14.270507468 -0700 @@ -1,26 +1,26 @@ IPWAVE Working Group A. Petrescu Internet-Draft CEA, LIST Intended status: Standards Track N. Benamar -Expires: October 13, 2019 Moulay Ismail University +Expires: October 16, 2019 Moulay Ismail University J. Haerri Eurecom J. Lee Sangmyung University T. Ernst YoGoKo - April 11, 2019 + April 14, 2019 Transmission of IPv6 Packets over IEEE 802.11 Networks operating in mode Outside the Context of a Basic Service Set (IPv6-over-80211-OCB) - draft-ietf-ipwave-ipv6-over-80211ocb-38 + draft-ietf-ipwave-ipv6-over-80211ocb-39 Abstract In order to transmit IPv6 packets on IEEE 802.11 networks running outside the context of a basic service set (OCB, earlier "802.11p") there is a need to define a few parameters such as the supported Maximum Transmission Unit size on the 802.11-OCB link, the header format preceding the IPv6 header, the Type value within it, and others. This document describes these parameters for IPv6 and IEEE 802.11-OCB networks; it portrays the layering of IPv6 on 802.11-OCB @@ -35,21 +35,21 @@ 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 https://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 October 13, 2019. + This Internet-Draft will expire on October 16, 2019. Copyright Notice Copyright (c) 2019 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 (https://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents @@ -57,22 +57,22 @@ to this document. Code Components extracted from this document must 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. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3 3. Communication Scenarios where IEEE 802.11-OCB Links are Used 4 - 4. IPv6 over 802.11-OCB . . . . . . . . . . . . . . . . . . . . 5 - 4.1. Maximum Transmission Unit (MTU) . . . . . . . . . . . . . 5 + 4. IPv6 over 802.11-OCB . . . . . . . . . . . . . . . . . . . . 4 + 4.1. Maximum Transmission Unit (MTU) . . . . . . . . . . . . . 4 4.2. Frame Format . . . . . . . . . . . . . . . . . . . . . . 5 4.2.1. Ethernet Adaptation Layer . . . . . . . . . . . . . . 5 4.3. Link-Local Addresses . . . . . . . . . . . . . . . . . . 7 4.4. Stateless Autoconfiguration . . . . . . . . . . . . . . . 7 4.5. Address Mapping . . . . . . . . . . . . . . . . . . . . . 8 4.5.1. Address Mapping -- Unicast . . . . . . . . . . . . . 8 4.5.2. Address Mapping -- Multicast . . . . . . . . . . . . 8 4.6. Subnet Structure . . . . . . . . . . . . . . . . . . . . 8 5. Security Considerations . . . . . . . . . . . . . . . . . . . 9 5.1. Privacy Considerations . . . . . . . . . . . . . . . . . 10 @@ -80,21 +80,21 @@ 5.2. MAC Address and Interface ID Generation . . . . . . . . . 11 5.3. Pseudonym Handling . . . . . . . . . . . . . . . . . . . 11 6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 12 7. Contributors . . . . . . . . . . . . . . . . . . . . . . . . 12 8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 12 9. References . . . . . . . . . . . . . . . . . . . . . . . . . 13 9.1. Normative References . . . . . . . . . . . . . . . . . . 13 9.2. Informative References . . . . . . . . . . . . . . . . . 15 Appendix A. ChangeLog . . . . . . . . . . . . . . . . . . . . . 17 Appendix B. 802.11p . . . . . . . . . . . . . . . . . . . . . . 27 - Appendix C. Aspects introduced by the OCB mode to 802.11 . . . . 27 + Appendix C. Aspects introduced by the OCB mode to 802.11 . . . . 28 Appendix D. Changes Needed on a software driver 802.11a to become a 802.11-OCB driver . . . 32 Appendix E. Protocol Layering . . . . . . . . . . . . . . . . . 33 Appendix F. Design Considerations . . . . . . . . . . . . . . . 34 Appendix G. IEEE 802.11 Messages Transmitted in OCB mode . . . . 34 Appendix H. Examples of Packet Formats . . . . . . . . . . . . . 34 H.1. Capture in Monitor Mode . . . . . . . . . . . . . . . . . 35 H.2. Capture in Normal Mode . . . . . . . . . . . . . . . . . 38 Appendix I. Extra Terminology . . . . . . . . . . . . . . . . . 40 Appendix J. Neighbor Discovery (ND) Potential Issues in Wireless @@ -113,22 +113,21 @@ layer. The IPv6 network layer operates on 802.11-OCB in the same manner as operating on Ethernet, but there are two kinds of exceptions: o Exceptions due to different operation of IPv6 network layer on 802.11 than on Ethernet. To satisfy these exceptions, this document describes an Ethernet Adaptation Layer between Ethernet headers and 802.11 headers. The Ethernet Adaptation Layer is described Section 4.2.1. The operation of IP on Ethernet is - described in [RFC1042], [RFC2464] and - [I-D.hinden-6man-rfc2464bis]. + described in [RFC1042], [RFC2464] . o Exceptions due to the OCB nature of 802.11-OCB compared to 802.11. This has impacts on security, privacy, subnet structure and movement detection. For security and privacy recommendations see Section 5 and Section 4.4. The subnet structure is described in Section 4.6. The movement detection on OCB links is not described in this document. In the published literature, many documents describe aspects and problems related to running IPv6 over 802.11-OCB: @@ -355,21 +354,23 @@ proved to have some performance issues [I-D.ietf-mboned-ieee802-mcast-problems]. These issues may be exacerbated in OCB mode. Solutions for these problems SHOULD consider the OCB mode of operation. 4.6. Subnet Structure A subnet is formed by the external 802.11-OCB interfaces of vehicles that are in close range (not by their in-vehicle interfaces). This subnet MUST use at least the link-local prefix and the interfaces - MUST be assigned IPv6 address(es) of type link-local. + MUST be assigned IPv6 address(es) of type link-local. All nodes in + the subnet MUST be able to communicate directly using their link- + local unicast addresses. The structure of this subnet is ephemeral, in that it is strongly influenced by the mobility of vehicles: the hidden terminal effects appear; the 802.11 networks in OCB mode may be considered as 'ad-hoc' networks with an addressing model as described in [RFC5889]. On another hand, the structure of the internal subnets in each car is relatively stable. As recommended in [RFC5889], when the timing requirements are very strict (e.g. fast drive through IP-RSU coverage), no on-link subnet @@ -704,25 +705,20 @@ [ETSI-sec-archi] "ETSI TS 102 940 V1.2.1 (2016-11), ETSI Technical Specification, Intelligent Transport Systems (ITS); Security; ITS communications security architecture and security management, November 2016. Downloaded on September 9th, 2017, freely available from ETSI website at URL http://www.etsi.org/deliver/ etsi_ts/102900_102999/102940/01.02.01_60/ ts_102940v010201p.pdf". - [I-D.hinden-6man-rfc2464bis] - Crawford, M. and R. Hinden, "Transmission of IPv6 Packets - over Ethernet Networks", draft-hinden-6man-rfc2464bis-02 - (work in progress), March 2017. - [I-D.ietf-ipwave-vehicular-networking-survey] Jeong, J., Cespedes, S., Benamar, N., Haerri, J., and M. Wetterwald, "Survey on IP-based Vehicular Networking for Intelligent Transportation Systems", draft-ietf-ipwave- vehicular-networking-survey-00 (work in progress), July 2017. [I-D.ietf-mboned-ieee802-mcast-problems] Perkins, C., McBride, M., Stanley, D., Kumari, W., and J. Zuniga, "Multicast Considerations over IEEE 802 Wireless @@ -773,20 +769,25 @@ document freely available at URL http://standards.ieee.org/getieee802/ download/802.11p-2010.pdf retrieved on September 20th, 2013.". Appendix A. ChangeLog The changes are listed in reverse chronological order, most recent changes appearing at the top of the list. + -39: removed a reference to an expired draft trying to update the + IPv6-over-Ethernet spec 'RFC2464bis'; added text in the subnet + structure section saying nodes MUST be able to communicate directly + using their link-local addresses. + -38: removed the word "fe80::/10". -37: added a section about issues on ND wireless; added the qualifier 'baseline' to using ND on 802.11-OCB; improved the description of the reference to 802.11-2016 document, with a qualifier about the difficulty of accessing it, even though it is free. -36: removed a phrase about the IID formation and MAC generation, but left in the section 5.2 that describes how it happens.