Re: Obtaining a list of MAC address for interfaces without IP

From: Andi Kleen (ak@suse.de)
Date: Wed Sep 13 2000 - 13:17:23 EST


On Wed, Sep 13, 2000 at 01:58:30PM -0400, Marc Schneider wrote:
> Steve -
>
> Thanks for the pointer to RTNETLINK.
>
> I understand how to use IFLA_ADDRESS and RTNETLINK to obtain the
> hardware address of an interface. ioctl SIOCGIFHWADDR also seem to work
> fine, but the interface isn't getting returned by ioctl SIOCGIFCONF and
> I don't see how to use RTNETLINK to return a list of all interfaces. Am
> I missing something? Someone suggested parsing /proc/net/dev but I'd
> rather not do that.

Use a RTM_GETLINK request with NLMF_F_DUMP flags and struct rtgenmsg
payload with rtgen_family set to PF_PACKET.

Overall you'll find /proc/net/dev easier though.

-Andi

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