#ifndef __NET_RTNETLINK_H#define __NET_RTNETLINK_H #include <linux/rtnetlink.h>#include <net/netlink.h> typedef int (*rtnl_doit_func)(struct sk_buff *, struct nlmsghdr *, void *);typedef int (*rtnl_dumpit_func)(struct sk_buff *, struct netlink_callback *); extern int	__rtnl_register(int protocol, int msgtype,				rtnl_doit_func, rtnl_dumpit_func);extern void	rtnl_register(int protocol, int msgtype,			      rtnl_doit_func, rtnl_dumpit_func);extern int	rtnl_unregister(int protocol, int msgtype);extern void	rtnl_unregister_all(int protocol); static inline int rtnl_msg_family(struct nlmsghdr *nlh){	if (nlmsg_len(nlh) >= sizeof(struct rtgenmsg))		return ((struct rtgenmsg *) nlmsg_data(nlh))->rtgen_family;	else		return AF_UNSPEC;} #endif