1 #ifndef _NET_IP6_ROUTE_H
2 #define _NET_IP6_ROUTE_H
4 #define IP6_RT_PRIO_USER 1024
5 #define IP6_RT_PRIO_ADDRCONF 256
11 #if defined(__BIG_ENDIAN_BITFIELD)
15 #elif defined(__LITTLE_ENDIAN_BITFIELD)
21 __u8 prefix[0]; /* 0,8 or 16 */
25 #include <net/ip6_fib.h>
28 #include <linux/ipv6.h>
30 #define RT6_LOOKUP_F_IFACE 0x00000001
31 #define RT6_LOOKUP_F_REACHABLE 0x00000002
32 #define RT6_LOOKUP_F_HAS_SADDR 0x00000004
33 #define RT6_LOOKUP_F_SRCPREF_TMP 0x00000008
34 #define RT6_LOOKUP_F_SRCPREF_PUBLIC 0x00000010
35 #define RT6_LOOKUP_F_SRCPREF_COA 0x00000020
38 * rt6_srcprefs2flags() and rt6_flags2srcprefs() translate
39 * between IPV6_ADDR_PREFERENCES socket option values
40 * IPV6_PREFER_SRC_TMP = 0x1
41 * IPV6_PREFER_SRC_PUBLIC = 0x2
42 * IPV6_PREFER_SRC_COA = 0x4
43 * and above RT6_LOOKUP_F_SRCPREF_xxx flags.
45 static inline int rt6_srcprefs2flags(unsigned int srcprefs)
47 /* No need to bitmask because srcprefs have only 3 bits. */
51 static inline unsigned int rt6_flags2srcprefs(int flags)
53 return (flags >> 3) & 7;
56 extern void rt6_bind_peer(struct rt6_info *rt,
59 static inline struct inet_peer *rt6_get_peer(struct rt6_info *rt)
68 extern void ip6_route_input(struct sk_buff *skb);
70 extern struct dst_entry * ip6_route_output(struct net *net,
71 const struct sock *sk,
73 extern struct dst_entry * ip6_route_lookup(struct net *net,
74 struct flowi6 *fl6, int flags);
76 extern int ip6_route_init(void);
77 extern void ip6_route_cleanup(void);
79 extern int ipv6_route_ioctl(struct net *net,
83 extern int ip6_route_add(struct fib6_config *cfg);
84 extern int ip6_ins_rt(struct rt6_info *);
85 extern int ip6_del_rt(struct rt6_info *);
87 extern int ip6_route_get_saddr(struct net *net,
89 const struct in6_addr *daddr,
91 struct in6_addr *saddr);
93 extern struct rt6_info *rt6_lookup(struct net *net,
94 const struct in6_addr *daddr,
95 const struct in6_addr *saddr,
98 extern struct dst_entry *icmp6_dst_alloc(struct net_device *dev,
99 struct neighbour *neigh,
100 const struct in6_addr *addr);
101 extern int icmp6_dst_gc(void);
103 extern void fib6_force_start_gc(struct net *net);
105 extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
106 const struct in6_addr *addr,
109 extern int ip6_dst_hoplimit(struct dst_entry *dst);
112 * support functions for ND
115 extern struct rt6_info * rt6_get_dflt_router(const struct in6_addr *addr,
116 struct net_device *dev);
117 extern struct rt6_info * rt6_add_dflt_router(const struct in6_addr *gwaddr,
118 struct net_device *dev,
121 extern void rt6_purge_dflt_routers(struct net *net);
123 extern int rt6_route_rcv(struct net_device *dev,
125 const struct in6_addr *gwaddr);
127 extern void rt6_redirect(const struct in6_addr *dest,
128 const struct in6_addr *src,
129 const struct in6_addr *saddr,
130 struct neighbour *neigh,
134 extern void rt6_pmtu_discovery(const struct in6_addr *daddr,
135 const struct in6_addr *saddr,
136 struct net_device *dev,
139 struct netlink_callback;
141 struct rt6_rtnl_dump_arg {
143 struct netlink_callback *cb;
147 extern int rt6_dump_route(struct rt6_info *rt, void *p_arg);
148 extern void rt6_ifdown(struct net *net, struct net_device *dev);
149 extern void rt6_mtu_change(struct net_device *dev, unsigned mtu);
150 extern void rt6_remove_prefsrc(struct inet6_ifaddr *ifp);
154 * Store a destination cache entry in a socket
156 static inline void __ip6_dst_store(struct sock *sk, struct dst_entry *dst,
157 struct in6_addr *daddr, struct in6_addr *saddr)
159 struct ipv6_pinfo *np = inet6_sk(sk);
160 struct rt6_info *rt = (struct rt6_info *) dst;
162 sk_setup_caps(sk, dst);
163 np->daddr_cache = daddr;
164 #ifdef CONFIG_IPV6_SUBTREES
165 np->saddr_cache = saddr;
167 np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
170 static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst,
171 struct in6_addr *daddr, struct in6_addr *saddr)
173 spin_lock(&sk->sk_dst_lock);
174 __ip6_dst_store(sk, dst, daddr, saddr);
175 spin_unlock(&sk->sk_dst_lock);
178 static inline int ipv6_unicast_destination(struct sk_buff *skb)
180 struct rt6_info *rt = (struct rt6_info *) skb_dst(skb);
182 return rt->rt6i_flags & RTF_LOCAL;
185 int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *));
187 static inline int ip6_skb_dst_mtu(struct sk_buff *skb)
189 struct ipv6_pinfo *np = skb->sk ? inet6_sk(skb->sk) : NULL;
191 return (np && np->pmtudisc == IPV6_PMTUDISC_PROBE) ?
192 skb_dst(skb)->dev->mtu : dst_mtu(skb_dst(skb));