#ifndef _NET_IP6_ROUTE_H#define _NET_IP6_ROUTE_H struct route_info {	__u8			type;	__u8			length;	__u8			prefix_len;#if defined(__BIG_ENDIAN_BITFIELD)	__u8			reserved_h:3,				route_pref:2,				reserved_l:3;#elif defined(__LITTLE_ENDIAN_BITFIELD)	__u8			reserved_l:3,				route_pref:2,				reserved_h:3;#endif	__be32			lifetime;	__u8			prefix[0];	/* 0,8 or 16 */}; #include <net/flow.h>#include <net/ip6_fib.h>#include <net/sock.h>#include <linux/ip.h>#include <linux/ipv6.h>#include <linux/route.h> #define RT6_LOOKUP_F_IFACE		0x00000001#define RT6_LOOKUP_F_REACHABLE		0x00000002#define RT6_LOOKUP_F_HAS_SADDR		0x00000004#define RT6_LOOKUP_F_SRCPREF_TMP	0x00000008#define RT6_LOOKUP_F_SRCPREF_PUBLIC	0x00000010#define RT6_LOOKUP_F_SRCPREF_COA	0x00000020 /* * rt6_srcprefs2flags() and rt6_flags2srcprefs() translate * between IPV6_ADDR_PREFERENCES socket option values *	IPV6_PREFER_SRC_TMP    = 0x1 *	IPV6_PREFER_SRC_PUBLIC = 0x2 *	IPV6_PREFER_SRC_COA    = 0x4 * and above RT6_LOOKUP_F_SRCPREF_xxx flags. */static inline int rt6_srcprefs2flags(unsigned int srcprefs){	/* No need to bitmask because srcprefs have only 3 bits. */	return srcprefs << 3;} static inline unsigned int rt6_flags2srcprefs(int flags){	return (flags >> 3) & 7;} void rt6_bind_peer(struct rt6_info *rt, int create); static inline struct inet_peer *__rt6_get_peer(struct rt6_info *rt, int create){	if (rt6_has_peer(rt))		return rt6_peer_ptr(rt); 	rt6_bind_peer(rt, create);	return (rt6_has_peer(rt) ? rt6_peer_ptr(rt) : NULL);} static inline struct inet_peer *rt6_get_peer(struct rt6_info *rt){	return __rt6_get_peer(rt, 0);} static inline struct inet_peer *rt6_get_peer_create(struct rt6_info *rt){	return __rt6_get_peer(rt, 1);} void ip6_route_input(struct sk_buff *skb); struct dst_entry *ip6_route_output(struct net *net, const struct sock *sk,				   struct flowi6 *fl6);struct dst_entry *ip6_route_lookup(struct net *net, struct flowi6 *fl6,				   int flags); int ip6_route_init(void);void ip6_route_cleanup(void); int ipv6_route_ioctl(struct net *net, unsigned int cmd, void __user *arg); int ip6_route_add(struct fib6_config *cfg);int ip6_ins_rt(struct rt6_info *);int ip6_del_rt(struct rt6_info *); int ip6_route_get_saddr(struct net *net, struct rt6_info *rt,			const struct in6_addr *daddr, unsigned int prefs,			struct in6_addr *saddr); struct rt6_info *rt6_lookup(struct net *net, const struct in6_addr *daddr,			    const struct in6_addr *saddr, int oif, int flags); struct dst_entry *icmp6_dst_alloc(struct net_device *dev, struct flowi6 *fl6);int icmp6_dst_gc(void); void fib6_force_start_gc(struct net *net); struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,				    const struct in6_addr *addr, bool anycast); /* *	support functions for ND * */struct rt6_info *rt6_get_dflt_router(const struct in6_addr *addr,				     struct net_device *dev);struct rt6_info *rt6_add_dflt_router(const struct in6_addr *gwaddr,				     struct net_device *dev, unsigned int pref); void rt6_purge_dflt_routers(struct net *net); int rt6_route_rcv(struct net_device *dev, u8 *opt, int len,		  const struct in6_addr *gwaddr); void ip6_update_pmtu(struct sk_buff *skb, struct net *net, __be32 mtu, int oif,		     u32 mark);void ip6_sk_update_pmtu(struct sk_buff *skb, struct sock *sk, __be32 mtu);void ip6_redirect(struct sk_buff *skb, struct net *net, int oif, u32 mark);void ip6_redirect_no_header(struct sk_buff *skb, struct net *net, int oif,			    u32 mark);void ip6_sk_redirect(struct sk_buff *skb, struct sock *sk); struct netlink_callback; struct rt6_rtnl_dump_arg {	struct sk_buff *skb;	struct netlink_callback *cb;	struct net *net;}; int rt6_dump_route(struct rt6_info *rt, void *p_arg);void rt6_ifdown(struct net *net, struct net_device *dev);void rt6_mtu_change(struct net_device *dev, unsigned int mtu);void rt6_remove_prefsrc(struct inet6_ifaddr *ifp);  /* *	Store a destination cache entry in a socket */static inline void __ip6_dst_store(struct sock *sk, struct dst_entry *dst,				   const struct in6_addr *daddr,				   const struct in6_addr *saddr){	struct ipv6_pinfo *np = inet6_sk(sk);	struct rt6_info *rt = (struct rt6_info *) dst; 	sk_setup_caps(sk, dst);	np->daddr_cache = daddr;#ifdef CONFIG_IPV6_SUBTREES	np->saddr_cache = saddr;#endif	np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;} static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst,				 struct in6_addr *daddr, struct in6_addr *saddr){	spin_lock(&sk->sk_dst_lock);	__ip6_dst_store(sk, dst, daddr, saddr);	spin_unlock(&sk->sk_dst_lock);} static inline bool ipv6_unicast_destination(const struct sk_buff *skb){	struct rt6_info *rt = (struct rt6_info *) skb_dst(skb); 	return rt->rt6i_flags & RTF_LOCAL;} int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *)); static inline int ip6_skb_dst_mtu(struct sk_buff *skb){	struct ipv6_pinfo *np = skb->sk ? inet6_sk(skb->sk) : NULL; 	return (np && np->pmtudisc == IPV6_PMTUDISC_PROBE) ?	       skb_dst(skb)->dev->mtu : dst_mtu(skb_dst(skb));} static inline struct in6_addr *rt6_nexthop(struct rt6_info *rt){	return &rt->rt6i_gateway;} #endif