Wireshark-bugs: [Wireshark-bugs] [Bug 2718] Ethernet II with SFD and LLC ?

Date: Fri, 18 Jul 2008 11:20:35 -0700 (PDT)
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=2718


Guy Harris <guy@xxxxxxxxxxxx> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         OS/Version|Windows XP                  |All
           Platform|PC                          |All




--- Comment #3 from Guy Harris <guy@xxxxxxxxxxxx>  2008-07-18 11:20:34 PDT ---
SFD:

    There are two layers involved here, the framing layer (preamble and SFD)
and the addresses-and-type/length layer.  The framing layer is the same
regardless of whether the addresses-and-type/length layer has a length field or
a type field; see section 3, "Media access control frame structure", of IEEE
802.3-2005.

"Ethernet II" vs. "802.3":

    Those names are a bit misleading, given that IEEE Std 802.3 has, since IEEE
Std 802.3xy-1997, included both frames with length fields and frames with type
fields (accepting *de jure* what had been *de facto* true all along).

    Currently, we dissect VLAN frames as if the VLAN encapsulation is a
protocol.  We could, instead, handle  Ethernet type values of 0x8100 and 0x9100
specially in packet-eth.c, and fix up the way the frame is labelled when we
finally determine whether the frame has a type or length field.


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