rtnl_doit_func, rtnl_dumpit_func);
extern int rtnl_unregister(int protocol, int msgtype);
extern void rtnl_unregister_all(int protocol);
-extern int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb);
static inline int rtnl_msg_family(struct nlmsghdr *nlh)
{