rtnl_link_get_kernel()

[Thomas Graf]

On Tue, Jul 03, 2012 at 11:32:15PM -0600, Wouter Verhelst wrote:
> So I'm trying to use that (I don't need no steenking cache), but it's
> not working.
> 
> My code does this:
> 
> (common.c)
> static nl_sock* socket;
> 
> struct nl_sock* get_socket() {
> 	if(!socket) {
> 		socket = nl_socket_alloc();
> 		nl_socket_set_local_port(socket, 0);

Setting the local port to 0 is not needed, generating a
unique port is the default.

> 	}
> 	return socket;
> }
> 
> (actual code later on)
> 
> struct nl_sock* socket = get_socket();
> struct rtnl_link* link = rtnl_link_alloc();
> 
> rtnl_link_get_kernel(socket, 0, "eth0", &link);
> 
> but that returns -NLE_BAD_SOCK. What am I missing?

Your socket is not connected, call nl_connect() and bind it
to the NETLINK_ROUTE netlink protocol.