[6lo] Call for adoption of draft-wachter-6lo-can-00 by 6Lo WG

Alexander Wachter <alexander@wachter.cloud> Thu, 17 October 2019 15:24 UTC

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From: Alexander Wachter <alexander@wachter.cloud>
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Date: Thu, 17 Oct 2019 17:25:20 +0200
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Subject: [6lo] Call for adoption of draft-wachter-6lo-can-00 by 6Lo WG
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Dear 6Lo WG,

I recently submitted a draft for IPv6 over Controller Area Network and 
would like to call for adoption by the 6Lo WG.
The title of the document is draft-wachter-6lo-can-00 [1].

Controller Area Network (CAN) is a widely used field bus initially 
designed for the automotive domain. It has a payload length of eight 
bytes for classic CAN and 64 bytes for CAN-FD. CAN only describes the 
data-link-layer, but various protocols already exist on top. The 
submitted draft introduces IPv6 over CAN (6LoCAN),  a 6lo-adaption-layer 
to send IPv6 packets over the constrained CAN-bus. 6LoCAN uses a subset 
of the already widely used ISO-TP standard for fragmentation and 
reassembly to meet the 1280 minimum MTU requirement of IPv6. It also 
uses the IPHC (RFC6282) to reduce the protocol overhead of IPv6.

A broad range of devices, from small and cheap MCUs to big application 
processors, already have CAN controllers onboard. With 6LoCAN, it is 
possible to create networks of resource-constrained MCUs that can 
leverage the broad range of protocols and security mechanisms built on 
top of the IP.
Additionally, multiple 6LoCAN networks can be connected together or even 
to the internet by utilizing the routing capabilities of IP networks.

A reference implementation of 6LoCAN already exists in the mainline 
Zephyrproject RTOS [2] tree. It includes a sample server-client 
application. The source for it is located under [3] and can be used on 
any boards supporting CAN.

I am looking forward to your comments on the draft.

Kind regards,

[1] https://datatracker.ietf.org/doc/draft-wachter-6lo-can/
[2] https://www.zephyrproject.org/

Alexander Wachter, BSc

Student of Information and Computer Engineering
Graz University of Technology