Find source port with Libpcap in bridging linux

May 6, 2012 at 6:05 PM


I use a linux bridge,

Is it possible to find the source port of a packet from bridging with libpcap???I sniffed at br0 and I want to know which port it reaches me exactly.

Thank you in advance

May 7, 2012 at 4:14 PM

I'm not sure.


I'm guessing you don't mean TCP Port, but some layer 2 port.

It's probably according to the Ethernet destination address?

Maybe the bridge has an internal state that knows to which port it should send the packets with specific Ethernet destination?