[6lo] SCHC over 6lo: Comments on A.3. PRO frame format example

Georgios PAPADOPOULOS <gpapadopoulos.ietf@gmail.com> Fri, 15 December 2023 13:38 UTC

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From: Georgios PAPADOPOULOS <gpapadopoulos.ietf@gmail.com>
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Date: Fri, 15 Dec 2023 14:37:51 +0100
Cc: 6lo@ietf.org
To: Carles Gomez Montenegro <carles.gomez@upc.edu>, anaminaburo@gmail.com
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Subject: [6lo] SCHC over 6lo: Comments on A.3. PRO frame format example
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Dear Carles and Ana,

To continue with the PRO approach, below you will find few clarification comments/questions on the "A.3. PRO frame format” example.

Many thanks,
Georgios

— — 
"SCHC Pointer Dispatch: 45 (01000101)"
[GP] All clear.

"SCHC Pointer: 88 40”
[GP] What the 88 represents?

"SCHC Pointer P: 1”
[GP] You meant “R”, the reserved bit?

"SCHC Pointer Bit Pointer: 8"
[GP] In the SCHC Pointer, the hexadecimal 88 indicates the starting position of the IPv6 destination address residue in the SCHC Header (in bits), then I do not understand the 8 here, it is the 8th bit after the SCHC Pointer? Is it a typo for 88?

"SCHC Address length: 64 bits”
[GP] All clear. SCHC Address length is 64 bits of the IID (i.e., 02 02 00 02 00 02 00 02), i.e., the 40 hexadecimal in the SCHC Pointer.

"SCHC RuleID: 0x20 (1 byte)”
[GP] This RuleID is sent from the source 6LN for example, it is not treated by the 6LR, we agree on that?
It basically addressed to the destination endpoint, isn’t it?

"SCHC residue: 02 02 00 02 00 02 00 02”
[GP] All clear.

"Payload: 68 65 6C 6C 6F 20 31”
[GP] "Hello 1” isn’t it "48 65 6c 6c 6f 20 31” from Ascii text to Hexadecimal?