On Oct 13, 2017, at 1:30 AM, Bruno Verstuyft <[email protected]>
wrote:
> at Excentis we are developing a DOCSIS 3.1 RF sniffer (XRA-31). Packets are
> saved in pcap format with an XRA header. This is a pseudo header that
> contains extra information on the sniffed DOCSIS packets, e.g. the MER
> (modulation error rate), SID on which the packets was sniffed, ...
>
> Is it possible to obtain a link-layer header type for this pseudo-header?
Yes.
You will have to give a detailed and complete specification for the
pseudo-header. You can either provide a URL for it, or can provide a
description that we can turn into a specification hosted on tcpdump.org, such
as the ones here:
http://www.tcpdump.org/linktypes/
Presumably what immediately follows the pseudo-header is a DOCSIS MAC frame, as
described by the DOCSIS 3.1 MAC and Upper Layer Protocols Interface
Specification (or whatever that specification is called for DOCSIS 3.1).
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