Wireshark-bugs: [Wireshark-bugs] [Bug 5280] New: radiotap data rate wrong for some rates

Date: Wed, 6 Oct 2010 08:42:37 -0700 (PDT)
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=5280

           Summary: radiotap data rate wrong for some rates
           Product: Wireshark
           Version: 1.4.1
          Platform: x86
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: Low
         Component: Wireshark
        AssignedTo: wireshark-bugs@xxxxxxxxxxxxx
        ReportedBy: Carsten.E.Lange@xxxxxx


Created an attachment (id=5270)
 --> (https://bugs.wireshark.org/bugzilla/attachment.cgi?id=5270)
802.11n 108Mb/s radiotap packet

Build Information:
Running on Windows XP Service Pack 3, build 2600, with WinPcap version 4.1.2
(packet.dll version 4.1.0.2001), based on libpcap version 1.0 branch 1_0_rel0b
(20091008), GnuTLS 2.8.5, Gcrypt 1.4.5, with AirPcap 4.1.1 build 1838.

Built using Microsoft Visual C++ 9.0 build 30729
--
using wireshark for wlan sniffing I noticed that some data rates from the
radiptap header are not reported correctly.
I used different wireshark versions from 1.2.x up to 1.4.x on windows xp and
linux (CentOS). All showed the same problem.

The attached packet was send using a datarate of 108Mb/s. The corresponding
byte in the radiotap header is 0xd8 hex, which is 216 dec.
The rate is given in multiples of 0.5 Mb/s.

The interpretation by wireshark of this rate is 13.0 Mb/s.

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