<div class="gmail_quote"><div><br></div><div>Thank you for your reply Jouni.</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Date: Sun, 6 Feb 2011 13:13:12 +0200<br>
From: Jouni Malinen <<a href="mailto:j@w1.fi" target="_blank">j@w1.fi</a>><br>
Subject: Re: No beacon activity<br>
To: <a href="mailto:hostap@lists.shmoo.com" target="_blank">hostap@lists.shmoo.com</a><br>
<br>
On Thu, Feb 03, 2011 at 10:53:50AM -0800, Lara Deek wrote:<br>
> 1) I am running a sniffer on the same machine A that is running hostapd. The<br>
> sniffer does not capture beacon messages (only captures probe request and<br>
> response packets, both broadcast and unicast). I ran a sniffer from another<br>
> machine B (with a different card) in monitor mode, and B does in fact<br>
> capture beacon messages (but never from A). Is there any reason why I do not<br>
> sniff beacon frames on A? How can I fix this?<br>
<br>
The actual Beacon frame transmission is not done by mac80211 and there<br>
is no mechanism for the driver to indicate that a Beacon frame was<br>
transmitted since this is not normally needed for anything. What would<br>
you be using the Beacon frames for in the local sniffer?<br>
<br></blockquote><div><br></div><div>The beacons I would like machine A to capture are those of its neighboring APs, to identify which APs can potentially conflict with it if they are on the same channel. A does not capture any beacons, but only captures probe request (broadcast) and response messages.</div>
<div><br></div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
> 2) I understand that hostapd only configures mac80211 with a template and<br>
> beacon interval, but does not actually send beacons. Is enabling beacon<br>
> transmission related to the firmware or driver? I have an AirMagnet C1060 PC<br>
> card with an an Atheros, ath9k support, chipset that is not sending beacon<br>
> messages. How should enable beacon transmission?<br>
<br>
The driver is responsible for configuring Beacon frame transmissions.<br>
<br>
How exactly did you verify that the card is not sending out Beacon<br>
frames? Have you used another device in monitor mode to check that?<br>
<br></blockquote><div><br></div><div>Yes, I have used another device in monitor mode (with an Ubiquiti SRC 802.11a/b/g MCX card with an AR5004 chipset), which captures beacons from sources but never from A. A has an <a href="http://www.airmagnet.com/assets/AirMagnet_802.11abgn_WirelessPCcard_TechSpec.pdf" target="_blank">AirMagnet card</a> which has an AR5416+AR5133 ath9k supported chipset. I am not sure whether the issues I am facing are actually due to limitations of the 802.11n PC card I am using. Unfortunately, the card has no online support.</div>
<meta http-equiv="content-type" content="text/html; charset=utf-8"><div><br></div><div>Otherwise, I am correctly configuring hostapd on A to run in master mode. After running hostapd, running iwconfig on A indicates that it is in master mode. The only problem is that there is no beacon activity. I would appreciate any insight on what the problem could be.</div>
<div><br></div><div>Thank you,</div><div>Lara</div>
<div><br></div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
--<br>
Jouni Malinen PGP id EFC895FA<br></blockquote></div>