On 9/7/22 16:04, Bob Hinden wrote:
Bob,
To clarify my question, it only relates to if SCHC should be added to the IPv6
Extension Header Types registry. I continue to think that adding it to the IP
Protocol Number registry is fine.
I understood this. The question is vers -00 or -01 going foreward.
thanks for your support.
Bob M.
Bob
On Sep 7, 2022, at 12:46 PM, Robert Moskowitz <rgm-i...@htt-consult.com> wrote:
On 9/7/22 15:15, Carsten Bormann wrote:
On 2022-09-07, at 18:36, Bob Hinden <bob.hin...@gmail.com> wrote:
Is this an IPv6 extension header? Does SCHC include a next header field so
it can point to a header that follows?
If you haven’t seen RFC 5856 to 5858: This is a miniseries of documents where
we have done the analog thing for the ROHC Robust Header Compression scheme
that is now being proposed for the SCHC Static Context Header Compression
scheme.
SCHC did it the other direction, first defining SCHC and then some of us coming
up with use cases for it being the actual IP protocol.
The actual allocation of an Internet Protocol Number to ROHC is in Section 6 of
RFC 5858: https://www.rfc-editor.org/rfc/rfc5858.html#section-6
IANA has allocated the value 142 to "ROHC" within the "Protocol
Numbers" registry [PROTOCOL]. This value will be used to indicate
that the next-level protocol header is a ROHC header.
Some forms of ROHC headers contain a next header field, but mostly that field
is compressed away as it is redundant between packets in a flow.
Bob’s document is doing the equivalent to RFC 5858, now for SCHC.
Once there is a WG adoption call, I’ll express that I am very much in favor of
this work going forward.
(As I have said before, I’d also like to see the equivalent IKE/IPsec support
that RFC 5856 and RFC 5857 provide for SCHC as well. But this can be done on
different timescales.)
Diet-ESP is the starting point. It has to be fully SCHCed.
DTLS is already compressed enough, but as I point out, given DTLS and SCHC, you
rarely need the UDP header content.
Bob
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