tcpdump mailing list archives

Re: Request for new DLT value for Wireshark Dissector


From: Guy Harris <guy () alum mit edu>
Date: Sun, 6 Feb 2011 14:17:37 -0800


On Feb 4, 2011, at 1:59 AM, Schemmel, Hans-Christoph wrote:

The parts that don´t correspond to a PPP packet are AT commands or responses
(like "ATI", "AT+CSQ" or "+CSQ: 18,99"). This content is interpreted and
displayed as raw text in the Wireshark subtree for the payload/information of a
packet. These commands and responses don´t need to be dissected.

...lthough it might be interesting information, so it might be worth showing it as text.

For link-layer types that don't correspond to published standards, I like to have a description in bpf.h, so that 
people know how to dissect the link-layer header (and know not to use the link-layer type if the header isn't exactly 
the same); should I just describe the holes as "other data", so you're not constrained to forever make them all be AT 
command/response text, or is it guaranteed (now and forever) to be AT-command-or-response text?-
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