Identify Beacon Frame

[Avinash Patil]

Hi Gunjan,

Are you talking about WLAN beacon frames? If so, you can you cfg80211
handlers to register management frames and once frame is received
parse frame type/subtype to check if its beacon.
I dont think beacon frames are delievered to netdev.

Thanks,
Avinash

On Fri, Aug 28, 2015 at 10:51 AM, Gunjan Mehta <gunjanmehta08 at gmail.com> wrote:
> Then how do i capture the beacon frames?
>
> On Fri, Aug 28, 2015 at 10:40 PM, Jeff Haran <Jeff.Haran at citrix.com> wrote:
>>
>>
>>
>>
>>
>> From: kernelnewbies-bounces at kernelnewbies.org
>> [mailto:kernelnewbies-bounces at kernelnewbies.org] On Behalf Of Gunjan Mehta
>> Sent: Friday, August 28, 2015 9:21 AM
>> To: kernelnewbies; netfilter-devel at vger.kernel.org
>> Subject: Identify Beacon Frame
>>
>>
>>
>> Hi All,
>>
>>
>>
>> I am new to kernel development. I am writing a kernel module that captures
>> packet at the netfilter pre - routing hook.
>>
>>
>>
>> I only want to capture the BEACON FRAME.
>>
>>
>>
>> I have few queries:
>>
>>
>>
>> 1>When the beacon frame comes to receiving machine do the sk_buff gets
>> allocated?
>>
>> 2> How can i identify the beacon frame at the pre routing hook?
>>
>> 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?
>>
>>
>>
>> Regards
>>
>> Gunjan
>>
>>
>>
>> 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.
>>
>>
>>
>> Jeff Haran
>>
>>
>
>
>
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