<div dir="ltr">Then how do i capture the beacon frames?</div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Aug 28, 2015 at 10:40 PM, Jeff Haran <span dir="ltr"><<a href="mailto:Jeff.Haran@citrix.com" target="_blank">Jeff.Haran@citrix.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div lang="EN-US" link="blue" vlink="purple">
<div>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<div style="border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt">
<div>
<div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> <a href="mailto:kernelnewbies-bounces@kernelnewbies.org" target="_blank">kernelnewbies-bounces@kernelnewbies.org</a> [mailto:<a href="mailto:kernelnewbies-bounces@kernelnewbies.org" target="_blank">kernelnewbies-bounces@kernelnewbies.org</a>]
<b>On Behalf Of </b>Gunjan Mehta<br>
<b>Sent:</b> Friday, August 28, 2015 9:21 AM<br>
<b>To:</b> kernelnewbies; <a href="mailto:netfilter-devel@vger.kernel.org" target="_blank">netfilter-devel@vger.kernel.org</a><br>
<b>Subject:</b> Identify Beacon Frame<u></u><u></u></span></p>
</div>
</div>
<p class="MsoNormal"><u></u> <u></u></p>
<div><div><div class="h5">
<p class="MsoNormal">Hi All,<u></u><u></u></p>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">I am new to kernel development. I am writing a kernel module that captures packet at the netfilter pre - routing hook.<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">I only want to capture the BEACON FRAME.<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">I have few queries:<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">1>When the beacon frame comes to receiving machine do the sk_buff gets allocated?<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal">2> How can i identify the beacon frame at the pre routing hook?<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal">3> Beacon frame consist of a string for authentication of client with the server, can i use sk_buff pointers to get access to that string, if sk_buff is allocated?<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">Regards<u></u><u></u></p>
</div>
</div></div><div>
<p class="MsoNormal">Gunjan<u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">These beacon frames do not appear to be IP packets. If that is true, I don’t think you are going to see them in any netfilter hooks.<span class="HOEnZb"><font color="#888888"><u></u><u></u></font></span></span></p><span class="HOEnZb"><font color="#888888">
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Jeff Haran<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
</font></span></div>
</div>
</div>
</div>
</div>
</blockquote></div><br></div>