netlink_example.erl

% Using https://github.com/Feuerlabs/netlink

{ok, _} = application:ensure_all_started(lager).
{ok, _} = application:ensure_all_started(netlink).

{ok, Ref} = netlink:subscribe("eth1", all, [flush]).
% or
{ok, Ref} = netlink:subscribe("eth1", [address, operstate], [flush]).

flush().

% You'll get messages of the form {netlink, Ref, "eth1", address, undefined, {10,0,0,1}}
% Note that 'address' messages come in (at least) two forms: hardware address changes and IP address changes.