net_conf_to_skb
err = net_conf_to_skb(skb, net_conf);
err = net_conf_to_skb(skb, &nc_clean);
err = net_conf_to_skb(skb, nc);
if (nc && net_conf_to_skb(skb, nc) != 0)
int net_conf_to_skb(struct sk_buff *skb, struct net_conf *s);