Hi guys!

I need to write an application (using pcap and libnet) which at first lists ALL the available ethernet adapters on the system.

Now when using libpcap, lookupdev() searches for the first device available it finds and no other (as far as I tried).

How can I check the other ones?
If there is a way to achieve this with libnet please tell me, I am still new at it but will eventually use it in the application.

second question: how can I get the mac address of the adapters?

Thanks in advance.

PS: If someone has used winpcap before, I need something like pcap_findalldevs()

Why can you NOT use "pcap_findalldevs"? Otherwise, your best off parsing /proc/net/dev yourself.

thanks for your reply.

I cannot use findalldevs() because it is only supported in wpcap(windows) not in libpcap(linux).

sorry, but i don't understand what you mean with parsing proc/...

I am still a with linux.

PS:I still need to know the MAC addresses

pcap_findalldevs does exist in libpcap.so.0.6 (and pcap.h) on my RedHat linux 9, so you may want to upgrade your pcap package.

The /proc filesystem is an interface into a lot of things that the kernel knows. If you open for reading or cat from the command line like so...

cat /proc/net/dev

You will see the output of your available devices.

Finding the MAC addresses is something that I don't know about though - I've never had a need. You may want to look into the source code for "arp" or "rarp" (reverse arp).