Wireshark-bugs: [Wireshark-bugs] [Bug 4170] New: The 802.11n rate MCS7 is reported as 19.5Mb/s
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From: bugzilla-daemon@xxxxxxxxxxxxx
Date: Wed, 28 Oct 2009 03:51:56 -0700 (PDT)
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=4170

           Summary: The 802.11n rate MCS7 is reported as 19.5Mb/s
           Product: Wireshark
           Version: 1.2.2
          Platform: x86
        OS/Version: Windows XP
            Status: NEW
          Severity: Normal
          Priority: Low
         Component: Wireshark
        AssignedTo: wireshark-bugs@xxxxxxxxxxxxx
        ReportedBy: olof.johansson@xxxxxxxxxxxxxx


Build Information:
Version 1.2.2 (SVN Rev 29910)

Copyright 1998-2009 Gerald Combs <gerald@xxxxxxxxxxxxx> and contributors.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Compiled with GTK+ 2.16.2, with GLib 2.20.3, with WinPcap (version unknown),
with libz 1.2.3, without POSIX capabilities, with libpcre 7.0, with SMI 0.4.8,
with c-ares 1.6.0, with Lua 5.1, with GnuTLS 2.8.1, with Gcrypt 1.4.4, with MIT
Kerberos, with GeoIP, with PortAudio V19-devel (built Sep 14 2009), with
AirPcap.

Running on Windows XP Service Pack 3, build 2600, with WinPcap version 4.1
beta5
(packet.dll version 4.1.0.1452), based on libpcap version 1.0.0, GnuTLS 2.8.1,
Gcrypt 1.4.4, with AirPcap 4.1.0 build 1622.

Built using Microsoft Visual C++ 9.0 build 30729

Wireshark is Open Source Software released under the GNU General Public
License.

Check the man page and http://www.wireshark.org for more information.
--
The 802.11n rate MCS7 is wrongly reported as 19.5Mb/s instead of 65 as it
should be. It is reported the same as MCS2 which can be confusing.

The byte in the packet cap which this is tied to seems to be correct though
(0x82)

See the attached capture file for a sniff of all the MCS rates (in order).

Look at the end for the MCS7 rate that is reported as 19.5Mb/s.

I am using the AirPcap Nx sniffer from casetech.com

Best regards,
Olof J


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