[ urgent]Packet filter using Source MAC address

aashish.verma · 06-01-2006, 08:24 AM

hi all,

Actually i have implemented packet filter using IP address... so i just thinking to implement the same with the MAC address..
how we will compare source mac address with the specific mac address?
the copy of source mac address is in the sk_buff structure,it is pointed by the data pointer.
but how we will compare the two addresses.
i am using C language ..
i need it urgent..
plz reply soon..

Thanks

blackhole54 · 06-01-2006, 11:40 AM

You do realize that the linux kernel impliments packet filtering? In the 2.4 & 2.6 kernels this includes the ability to match on MAC addresses.

graemef · 06-01-2006, 12:49 PM

So what do you have...

Do you have the MAC address or do you want to know how to get it?
Is your problem trying to work out how to do a compare?

aashish.verma · 06-02-2006, 12:04 PM

hello graemef,

ya my problem is how to compare the mac address which is stored in the Sk_buff structure?

I think we can get MAC address from Union mac from Sk_buff structure.
i am using this code for my project.. so plz help me...

graemef · 06-02-2006, 12:56 PM

Take a look at this thread, hopefully it will help you.

aashish.verma · 06-03-2006, 02:54 AM

hi Graemef,

Thanks for your help..i got the code which i am looking for...
the link u have sent is useful.. but when i tried the code it is not giving proper output..

By the way , i used struct Sk_buff's union mac to get the source address and then compare it with the MAC address specified.

Thanks