Wireshark-bugs: [Wireshark-bugs] [Bug 11277] New: Problem in decoding Wifi Traffic with MPDU agg
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From: bugzilla-daemon@xxxxxxxxxxxxx
Date: Mon, 15 Jun 2015 10:48:55 +0000
Bug ID 11277
Summary Problem in decoding Wifi Traffic with MPDU aggregation Enabled
Product Wireshark
Version unspecified
Hardware x86-64
OS Windows 8.1
Status UNCONFIRMED
Severity Normal
Priority Low
Component Dissection engine (libwireshark)
Assignee bugzilla-admin@wireshark.org
Reporter hany.assasa@gmail.com 

Created attachment 13666 [details]
802.11 MPDU Aggregation Capture File

Build Information:
Paste the COMPLETE build information from "Help->About Wireshark", "wireshark
-v", or "tshark -v".
--
I am using ns3 tool to generate experimental 802.11n Traffic. 
The traffic is generated having the following characteristics:

1. Application Packet Size is :1400 Bytes
2. Transport Layer: UDP
3. MPDU aggregation: Enabled
4. MSDU Aggregation: Disabled

Each generated packet has RadioTap Header associated to it. The RadioTap Header
includes A-MPDU Status Flag which states whether MPDU aggregation is enabled or
not. However, Wireshark seems to not able to decode the frames correctly if
MPDU aggregation is enabled. 

Please find the attached file. From the file you can see that I have wrong
frame type. So instead of being QoS Data Type frames, they are interpreted as
Disassociate frames. The reason is wireshark does not escape the 4 bytes
followed by the Wifi MAC Header. These four bytes corresponds to the MPDU
Delimiter defined by 802.11 Standard.

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