1 #ifndef _NET_IP6_ROUTE_H
2 #define _NET_IP6_ROUTE_H
8 #if defined(__BIG_ENDIAN_BITFIELD)
12 #elif defined(__LITTLE_ENDIAN_BITFIELD)
18 __u8 prefix[0]; /* 0,8 or 16 */
22 #include <net/ip6_fib.h>
25 #include <linux/ipv6.h>
26 #include <linux/route.h>
28 #define RT6_LOOKUP_F_IFACE 0x00000001
29 #define RT6_LOOKUP_F_REACHABLE 0x00000002
30 #define RT6_LOOKUP_F_HAS_SADDR 0x00000004
31 #define RT6_LOOKUP_F_SRCPREF_TMP 0x00000008
32 #define RT6_LOOKUP_F_SRCPREF_PUBLIC 0x00000010
33 #define RT6_LOOKUP_F_SRCPREF_COA 0x00000020
36 * rt6_srcprefs2flags() and rt6_flags2srcprefs() translate
37 * between IPV6_ADDR_PREFERENCES socket option values
38 * IPV6_PREFER_SRC_TMP = 0x1
39 * IPV6_PREFER_SRC_PUBLIC = 0x2
40 * IPV6_PREFER_SRC_COA = 0x4
41 * and above RT6_LOOKUP_F_SRCPREF_xxx flags.
43 static inline int rt6_srcprefs2flags(unsigned int srcprefs)
45 /* No need to bitmask because srcprefs have only 3 bits. */
49 static inline unsigned int rt6_flags2srcprefs(int flags)
51 return (flags >> 3) & 7;
54 void rt6_bind_peer(struct rt6_info *rt, int create);
56 static inline struct inet_peer *__rt6_get_peer(struct rt6_info *rt, int create)
59 return rt6_peer_ptr(rt);
61 rt6_bind_peer(rt, create);
62 return (rt6_has_peer(rt) ? rt6_peer_ptr(rt) : NULL);
65 static inline struct inet_peer *rt6_get_peer(struct rt6_info *rt)
67 return __rt6_get_peer(rt, 0);
70 static inline struct inet_peer *rt6_get_peer_create(struct rt6_info *rt)
72 return __rt6_get_peer(rt, 1);
75 void ip6_route_input(struct sk_buff *skb);
77 struct dst_entry *ip6_route_output(struct net *net, const struct sock *sk,
79 struct dst_entry *ip6_route_lookup(struct net *net, struct flowi6 *fl6,
82 int ip6_route_init(void);
83 void ip6_route_cleanup(void);
85 int ipv6_route_ioctl(struct net *net, unsigned int cmd, void __user *arg);
87 int ip6_route_add(struct fib6_config *cfg);
88 int ip6_ins_rt(struct rt6_info *);
89 int ip6_del_rt(struct rt6_info *);
91 int ip6_route_get_saddr(struct net *net, struct rt6_info *rt,
92 const struct in6_addr *daddr, unsigned int prefs,
93 struct in6_addr *saddr);
95 struct rt6_info *rt6_lookup(struct net *net, const struct in6_addr *daddr,
96 const struct in6_addr *saddr, int oif, int flags);
98 struct dst_entry *icmp6_dst_alloc(struct net_device *dev, struct flowi6 *fl6);
99 int icmp6_dst_gc(void);
101 void fib6_force_start_gc(struct net *net);
103 struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
104 const struct in6_addr *addr, bool anycast);
107 * support functions for ND
110 struct rt6_info *rt6_get_dflt_router(const struct in6_addr *addr,
111 struct net_device *dev);
112 struct rt6_info *rt6_add_dflt_router(const struct in6_addr *gwaddr,
113 struct net_device *dev, unsigned int pref);
115 void rt6_purge_dflt_routers(struct net *net);
117 int rt6_route_rcv(struct net_device *dev, u8 *opt, int len,
118 const struct in6_addr *gwaddr);
120 void ip6_update_pmtu(struct sk_buff *skb, struct net *net, __be32 mtu, int oif,
122 void ip6_sk_update_pmtu(struct sk_buff *skb, struct sock *sk, __be32 mtu);
123 void ip6_redirect(struct sk_buff *skb, struct net *net, int oif, u32 mark);
124 void ip6_redirect_no_header(struct sk_buff *skb, struct net *net, int oif,
126 void ip6_sk_redirect(struct sk_buff *skb, struct sock *sk);
128 struct netlink_callback;
130 struct rt6_rtnl_dump_arg {
132 struct netlink_callback *cb;
136 int rt6_dump_route(struct rt6_info *rt, void *p_arg);
137 void rt6_ifdown(struct net *net, struct net_device *dev);
138 void rt6_mtu_change(struct net_device *dev, unsigned int mtu);
139 void rt6_remove_prefsrc(struct inet6_ifaddr *ifp);
143 * Store a destination cache entry in a socket
145 static inline void __ip6_dst_store(struct sock *sk, struct dst_entry *dst,
146 const struct in6_addr *daddr,
147 const struct in6_addr *saddr)
149 struct ipv6_pinfo *np = inet6_sk(sk);
150 struct rt6_info *rt = (struct rt6_info *) dst;
152 sk_setup_caps(sk, dst);
153 np->daddr_cache = daddr;
154 #ifdef CONFIG_IPV6_SUBTREES
155 np->saddr_cache = saddr;
157 np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
160 static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst,
161 struct in6_addr *daddr, struct in6_addr *saddr)
163 spin_lock(&sk->sk_dst_lock);
164 __ip6_dst_store(sk, dst, daddr, saddr);
165 spin_unlock(&sk->sk_dst_lock);
168 static inline bool ipv6_unicast_destination(const struct sk_buff *skb)
170 struct rt6_info *rt = (struct rt6_info *) skb_dst(skb);
172 return rt->rt6i_flags & RTF_LOCAL;
175 int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *));
177 static inline int ip6_skb_dst_mtu(struct sk_buff *skb)
179 struct ipv6_pinfo *np = skb->sk ? inet6_sk(skb->sk) : NULL;
181 return (np && np->pmtudisc == IPV6_PMTUDISC_PROBE) ?
182 skb_dst(skb)->dev->mtu : dst_mtu(skb_dst(skb));
185 static inline struct in6_addr *rt6_nexthop(struct rt6_info *rt)
187 return &rt->rt6i_gateway;