#ifndef _NET_IP6_ROUTE_H #define _NET_IP6_ROUTE_H #define IP6_RT_PRIO_USER 1024 #define IP6_RT_PRIO_ADDRCONF 256 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> #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; } extern void rt6_bind_peer(struct rt6_info *rt, int create); static inline struct inet_peer *rt6_get_peer(struct rt6_info *rt) { if (rt->rt6i_peer) return rt->rt6i_peer; rt6_bind_peer(rt, 0); return rt->rt6i_peer; } extern void ip6_route_input(struct sk_buff *skb); extern struct dst_entry * ip6_route_output(struct net *net, const struct sock *sk, struct flowi6 *fl6); extern int ip6_route_init(void); extern void ip6_route_cleanup(void); extern int ipv6_route_ioctl(struct net *net, unsigned int cmd, void __user *arg); extern int ip6_route_add(struct fib6_config *cfg); extern int ip6_ins_rt(struct rt6_info *); extern int ip6_del_rt(struct rt6_info *); extern int ip6_route_get_saddr(struct net *net, struct rt6_info *rt, const struct in6_addr *daddr, unsigned int prefs, struct in6_addr *saddr); extern struct rt6_info *rt6_lookup(struct net *net, const struct in6_addr *daddr, const struct in6_addr *saddr, int oif, int flags); extern struct dst_entry *icmp6_dst_alloc(struct net_device *dev, struct neighbour *neigh, const struct in6_addr *addr); extern int icmp6_dst_gc(void); extern void fib6_force_start_gc(struct net *net); extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev, const struct in6_addr *addr, int anycast); extern int ip6_dst_hoplimit(struct dst_entry *dst); /* * support functions for ND * */ extern struct rt6_info * rt6_get_dflt_router(const struct in6_addr *addr, struct net_device *dev); extern struct rt6_info * rt6_add_dflt_router(const struct in6_addr *gwaddr, struct net_device *dev, unsigned int pref); extern void rt6_purge_dflt_routers(struct net *net); extern int rt6_route_rcv(struct net_device *dev, u8 *opt, int len, const struct in6_addr *gwaddr); extern void rt6_redirect(const struct in6_addr *dest, const struct in6_addr *src, const struct in6_addr *saddr, struct neighbour *neigh, u8 *lladdr, int on_link); extern void rt6_pmtu_discovery(const struct in6_addr *daddr, const struct in6_addr *saddr, struct net_device *dev, u32 pmtu); struct netlink_callback; struct rt6_rtnl_dump_arg { struct sk_buff *skb; struct netlink_callback *cb; struct net *net; }; extern int rt6_dump_route(struct rt6_info *rt, void *p_arg); extern void rt6_ifdown(struct net *net, struct net_device *dev); extern void rt6_mtu_change(struct net_device *dev, unsigned mtu); extern 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, struct in6_addr *daddr, 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 int ipv6_unicast_destination(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)); } #endif