On Wednesday, March 25, 2015 10:49:43 AM Thomas V wrote: > There is a possibility that the 1st frame is retried. Can you check for the > "retry bit" in the sniffer capture.
The retry flag in the IEEE 802.11 section is set to zero for both the first and
second packet. Here is a text version of Wireshark's exported packet
dissection for the second packet:
IEEE 802.11 Data, Flags: .......T
Type/Subtype: Data (0x0020)
Frame Control Field: 0x0801
.... ..00 = Version: 0
.... 10.. = Type: Data frame (2)
0000 .... = Subtype: 0
Flags: 0x01
.... ..01 = DS status: Frame from STA to DS via an AP (To DS: 1
From DS: 0) (0x01)
.... .0.. = More Fragments: This is the last fragment
.... 0... = Retry: Frame is not being retransmitted
...0 .... = PWR MGT: STA will stay up
..0. .... = More Data: No data buffered
.0.. .... = Protected flag: Data is not protected
0... .... = Order flag: Not strictly ordered
.000 0000 0000 0000 = Duration: 0 microseconds
Receiver address: Broadcast (ff:ff:ff:ff:ff:ff)
BSS Id: Broadcast (ff:ff:ff:ff:ff:ff)
Transmitter address: 13:22:33:44:55:66 (13:22:33:44:55:66)
Source address: 13:22:33:44:55:66 (13:22:33:44:55:66)
Destination address: 13:22:33:44:55:66 (13:22:33:44:55:66)
Fragment number: 0
Sequence number: 2145
Thanks for your help!
Regards,
Mark Gannon
--
You have to accept whatever comes, and the only important thing is that you
meet it with the best you have to give.
— Eleanor Roosevelt
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