Last Call Review of draft-ietf-lpwan-coap-static-context-hc-12
review-ietf-lpwan-coap-static-context-hc-12-tsvart-lc-touch-2020-02-12-00

Request Review of draft-ietf-lpwan-coap-static-context-hc
Requested rev. no specific revision (document currently at 19)
Type Last Call Review
Team Transport Area Review Team (tsvart)
Deadline 2020-02-20
Requested 2020-02-06
Authors Ana Minaburo, Laurent Toutain, Ricardo Andreasen
Draft last updated 2020-02-12
Completed reviews Iotdir Last Call review of -11 by Stephen Farrell (diff)
Genart Last Call review of -12 by Theresa Enghardt (diff)
Opsdir Last Call review of -12 by Linda Dunbar (diff)
Tsvart Last Call review of -12 by Joseph Touch (diff)
Secdir Last Call review of -12 by Paul Wouters (diff)
Secdir Last Call review of -13 by Charlie Kaufman (diff)
Secdir Telechat review of -15 by Charlie Kaufman (diff)
Assignment Reviewer Joseph Touch 
State Completed
Review review-ietf-lpwan-coap-static-context-hc-12-tsvart-lc-touch-2020-02-12
Posted at https://mailarchive.ietf.org/arch/msg/tsv-art/lOfjo8-Ryhaf7ASOVPcoTbOEkm0
Reviewed rev. 12 (document currently at 19)
Review result Almost Ready
Review completed: 2020-02-12

Review
review-ietf-lpwan-coap-static-context-hc-12-tsvart-lc-touch-2020-02-12

This document has been reviewed as part of the transport area review team's
ongoing effort to review key IETF documents. These comments were written
primarily for the transport area directors, but are copied to the document's
authors and WG to allow them to address any issues raised and also to the IETF
discussion list for information.

When done at the time of IETF Last Call, the authors should consider this
review as part of the last-call comments they receive. Please always CC
tsv-art@ietf.org if you reply to or forward this review.

I found no transport issues with this document.

However, this document normatively cites ietf-lpwan-ipv6-static-context-hc, which does have some transport issues of concern. I am listing them here because of the dependency between the two documents.

In particular, ietf-lpwan-ipv6-static-context-hc overlooks the case where the IP header indicates a packet longer than the UDP header, a case that is currently being developed for UDP header options in TSVWG. This other document claims that both UDP and IPv6 length fields can be computed from the received data, but this is not the case when the IP header indicates a packet end after that of the UDP header. See draft-tsvwg-udp-options for more information.

There are no changes needed to this document to address this length issue, but the normative dependency in this doc is the reason for indicatin this document as "Almost Ready".