tcpdump mailing list archives

Re: DLTs for Z-Wave


From: Guy Harris <guy () alum mit edu>
Date: Wed, 10 Sep 2014 11:45:23 -0700


On Sep 10, 2014, at 11:39 AM, Joshua Wright <jwright () hasborg com> wrote:

It would be reasonable to anticipate additional characteristics that could make their way into a capture file for 
received traffic, such as RSSI and noise levels, antenna selection, etc.  For the requested link types, the packet 
will start with the MAC Layer data (the 4-byte HomeID comes first), including an FCS, with no additional data.  For 
captures that require RSSI or additional metadata to be associated with the packet, RadioTap or PPI could be used 
similar to what is already done for Bluetooth Low Energy and other wireless protocols.

So presumably new LINKTYPE_/DLT_ values will be requested for the captures with metadata, once the format for the 
metadata is specified?

(PPI is *not* an ideal solution here; it's preferable to have the LINKTYPE_/DLT_ value directly specify the link-layer 
header type, rather than having the link-layer metadata header itself include a LINKTYPE_ value.)

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