From: Severin Kacianka <severin.kacianka@aau.at>
To: linux-wireless@vger.kernel.org
Subject: A question about monitor mode
Date: Wed, 04 Jun 2014 08:22:20 +0200 [thread overview]
Message-ID: <538EBB1C.3060106@aau.at> (raw)
Hello,
I have a question about monitor mode and the monitor interface: When
will a frame show up in the monitor interface?
If I understand 802.11 correctly, there will first be a Request to Send
(RTS), then a Clear to Send (CTS) signal. Then the actual frame will be
send followed by an ACK.
I did some testing and it seems, that the frame shows up in the
monitoring interface after the ACK is received.
My test setup was to record the socket.send call of an UDP packet with
an unique ID and then measure the time it takes for that packet to be
read on the monitor interface.
As the measured time was not constant, but seemed to vary in relation to
the network conditions I suppose that the frame only shows up after its
delivery was acknowledged.
Is this observation correct and where in the kernel's source (or
elsewhere) should I look for more details?
Thank you for your time and best regards,
Severin
next reply other threads:[~2014-06-04 6:29 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-04 6:22 Severin Kacianka [this message]
2014-06-04 12:48 ` A question about monitor mode Kalle Valo
2014-06-04 14:47 ` Severin Kacianka
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