ESP Header Compression and Diet-ESP
draft-mglt-ipsecme-diet-esp-07
ipsecme D. Migault
Internet-Draft Ericsson
Intended status: Standards Track T. Guggemos
Expires: September 12, 2019 LMU Munich
C. Bormann
Universitaet Bremen TZI
D. Schinazi
Google LLC
March 11, 2019
ESP Header Compression and Diet-ESP
draft-mglt-ipsecme-diet-esp-07
Abstract
With the use of encrypted ESP for secure IP communication, the
compression of IP payload is only possible with complex frameworks,
such as RObust Header Compression (ROHC). Such frameworks are too
complex for numerous use cases and especially for IoT scenarios,
which makes IPsec not being used here, although it offers
architectural benefits.
ESP Header Compression (EHC) defines a flexible framework to compress
communications protected with IPsec/ESP. Compression and
decompression is defined by EHC Rules orchestrated by EHC Strategies.
The necessary state is hold within the IPsec Security Association and
can be negotiated during key agreement, e.g. with IKEv2.
The document specifies the necessary parameters of the EHC Context to
allow compression of ESP and the most common included protocols, such
as IPv4, IPv6, UDP and TCP and the corresponding EHC Rules. It also
defines the Diet-ESP EHC Strategy which compresses up to 32 bytes per
packet for traditional IPv6 VPN and up to 66 bytes for IPv6 VPN sent
over a single TCP or UDP session.
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
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Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
Migault, et al. Expires September 12, 2019 [Page 1]
Internet-Draft Diet-ESP March 2019
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 September 12, 2019.
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Table of Contents
1. Requirements notation . . . . . . . . . . . . . . . . . . . . 3
2. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 4
4. Protocol Overview . . . . . . . . . . . . . . . . . . . . . . 4
5. IPsec Compression Mode . . . . . . . . . . . . . . . . . . . 7
6. EHC Context . . . . . . . . . . . . . . . . . . . . . . . . . 7
6.1. EHC Context Parameters for ESP . . . . . . . . . . . . . 8
6.2. EHC Context Parameters for Inner IP . . . . . . . . . . . 8
6.3. EHC Context Parameters for Transport Protocol . . . . . . 9
7. EHC Rules . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7.1. EHC Rules for ESP . . . . . . . . . . . . . . . . . . . . 13
7.2. EHC Rules for inner IPv4 . . . . . . . . . . . . . . . . 15
7.3. EHC Rules for inner IPv6 . . . . . . . . . . . . . . . . 17
7.4. EHC Rules for UDP . . . . . . . . . . . . . . . . . . . . 18
7.5. EHC Rules for UDP-Lite . . . . . . . . . . . . . . . . . 19
7.6. EHC Rules for TCP . . . . . . . . . . . . . . . . . . . . 20
8. Diet-ESP EHC Strategy . . . . . . . . . . . . . . . . . . . . 21
8.1. Outbound Packet Processing . . . . . . . . . . . . . . . 24
8.2. Inbound Packet Processing . . . . . . . . . . . . . . . . 26
9. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 29
10. Security Considerations . . . . . . . . . . . . . . . . . . . 29
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