https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=3288
Guy Harris <guy@xxxxxxxxxxxx> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
OS/Version|Debian |All
Platform|PC |All
Resolution| |INVALID
--- Comment #5 from Guy Harris <guy@xxxxxxxxxxxx> 2009-02-28 23:35:50 PDT ---
IEEE Std 802.11e-2005 says, in section 7.1.3.5 "QoS Control field", that frames
sent by non-AP QSTAs don't *have* an EOSP bit; instead, bit 4 of the QoS
Control field indicates whether bits 8-15 of the QoS Control field are the TXOP
Duration Requested or Queue Size.
Unless I'm missing something, frames sent by an AP would have From DS set; the
frames you're not seeing when you filter on wlan.qos.eosp don't have From DS
set, which means they don't have an EOSP bit, and therefore neither
wlan.qos.eosp == 0 nor wlan.qos.eosp == 1 are true (wlan.qos.eosp doesn't exist
in those frames, so it is neither 0 nor 1 nor any other value in that frame),
so neither of those filters should, and neither of those filters will, match
those frames.
I've checked in changes to add a "wlan.qos.bit4" field, to give the value of
bit 4 for non-AP frames, and also cleaned up the display of bits 8-15 of the
QoS field.
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