| Bug ID |
8561
|
| Summary |
QOS decode broken
|
| Classification |
Unclassified
|
| Product |
Wireshark
|
| Version |
1.9.x (Experimental)
|
| Hardware |
x86-64
|
| OS |
Windows 7
|
| Status |
UNCONFIRMED
|
| Severity |
Major
|
| Priority |
Low
|
| Component |
Dissection engine (libwireshark)
|
| Assignee |
[email protected]
|
| Reporter |
[email protected]
|
Created attachment 10544 [details]
Example frame
Build Information:
--
In earlier versions the QOS decode was correct - e.g. 1.9.1 svn 47874
In the downloadable 1.9.2 and the SVN 1.9.3 48727 it is broken.
in the following the Qos priority is decoded as best effort, but it should be
Video:-
1.9.3 decode (broken):-
IEEE 802.11 QoS Data, Flags: .p.P...TC
Type/Subtype: QoS Data (0x28)
Frame Control Field: 0x8851
.000 0001 0100 1100 = Duration: 332 microseconds
Receiver address: Epigram_13:01:a3 (00:90:4c:13:01:a3)
BSS Id: Epigram_13:01:a3 (00:90:4c:13:01:a3)
Transmitter address: Cambridg_00:0c:91 (00:02:5b:00:0c:91)
Source address: Cambridg_00:0c:91 (00:02:5b:00:0c:91)
Destination address: Qisda_b0:d6:fe (00:1e:21:b0:d6:fe)
Fragment number: 0
Sequence number: 2593
Frame check sequence: 0x8b0d8a5d [correct]
Qos Control: 0x0500
.... .... .... 0000 = TID: 0
[.... .... .... .000 = Priority: Best Effort (Best Effort) (0)]
.... .... ...0 .... = QoS bit 4: Bits 8-15 of QoS Control field are
TXOP Duration Requested
.... .... .00. .... = Ack Policy: Normal Ack (0x0000)
.... .... 0... .... = Payload Type: MSDU
0000 0000 .... .... = TXOP Duration Requested: 0 (no TXOP requested)
CCMP parameters
1.9.1 decode (ok):-
IEEE 802.11 QoS Data, Flags: .p.P...TC
Type/Subtype: QoS Data (0x28)
Frame Control: 0x5188 (Normal)
.000 0001 0100 1100 = Duration: 332 microseconds
Receiver address: Epigram_13:01:a3 (00:90:4c:13:01:a3)
BSS Id: Epigram_13:01:a3 (00:90:4c:13:01:a3)
Transmitter address: Cambridg_00:0c:91 (00:02:5b:00:0c:91)
Source address: Cambridg_00:0c:91 (00:02:5b:00:0c:91)
Destination address: Qisda_b0:d6:fe (00:1e:21:b0:d6:fe)
Fragment number: 0
Sequence number: 2593
Frame check sequence: 0x5d8a0d8b [correct]
QoS Control
TID: 5
Priority: 5 (Video) (Video)
...0 .... = QoS bit 4: Bits 8-15 of QoS Control field are TXOP Duration
Requested
Ack Policy: Normal Ack (0x00)
Payload Type: MSDU
TXOP Duration Requested: no TXOP requested (0)
CCMP parameters
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