Re: [OPSAWG] [pcap-ng-format] draft-gharris-opsawg-pcap.txt --- FCS length description

[Michael Richardson via tcpdump-workers <tcpdump-workers () lists tcpdump org>]

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> From: Michael Richardson <mcr+ietf () sandelman ca>
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> Date: Tue, 22 Dec 2020 11:40:47 -0500
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> <#secure method=pgp mode=sign>
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> Guy Harris <gharris () sonic net> wrote:
>     > a 6-bit "extension" field, storing information about the
>     > capture, such an indication of whether the packets include an
>     > FCS and, if so, how many bytes of FCS are present.
>
>     > So what NetBSD had was a convention where a capture file could have a
>     > link-layer type that combined an AF_ value with some additional bits to
>     > distinguish the value from a regular LINKTYPE_ value; I don't know what
>     > AF_ values they supported for that, or where that code was, or whether
>     > it's still supported.
>
> Wow, lots of ill-defined complexity here.
>
> I think that we should just regard this as water under the bridge.
> If NetBSD wants to propose a use for those empty bits, then a new
> specification could update that use case.
>
> --
> Michael Richardson <mcr+IETF () sandelman ca>   . o O ( IPv6 IøT consulting )
>            Sandelman Software Works Inc, Ottawa and Worldwide
>
> --- End Message ---
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