-struct sock *netlink_getsockbypid(struct sock *ssk, u32 pid);
-struct sock *netlink_getsockbyfilp(struct file *filp);
-int netlink_attachskb(struct sock *sk, struct sk_buff *skb, int nonblock, long timeo);
-void netlink_detachskb(struct sock *sk, struct sk_buff *skb);
-int netlink_sendskb(struct sock *sk, struct sk_buff *skb, int protocol);
-
-/* finegrained unicast helpers: */
-struct sock *netlink_getsockbypid(struct sock *ssk, u32 pid);