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;
55 void ip6_route_input(struct sk_buff *skb);
57 struct dst_entry *ip6_route_output(struct net *net, const struct sock *sk,
59 struct dst_entry *ip6_route_lookup(struct net *net, struct flowi6 *fl6,
62 int ip6_route_init(void);
63 void ip6_route_cleanup(void);
65 int ipv6_route_ioctl(struct net *net, unsigned int cmd, void __user *arg);
67 int ip6_route_add(struct fib6_config *cfg);
68 int ip6_ins_rt(struct rt6_info *);
69 int ip6_del_rt(struct rt6_info *);
71 int ip6_route_get_saddr(struct net *net, struct rt6_info *rt,
72 const struct in6_addr *daddr, unsigned int prefs,
73 struct in6_addr *saddr);
75 struct rt6_info *rt6_lookup(struct net *net, const struct in6_addr *daddr,
76 const struct in6_addr *saddr, int oif, int flags);
78 struct dst_entry *icmp6_dst_alloc(struct net_device *dev, struct flowi6 *fl6);
79 int icmp6_dst_gc(void);
81 void fib6_force_start_gc(struct net *net);
83 struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
84 const struct in6_addr *addr, bool anycast);
87 * support functions for ND
90 struct rt6_info *rt6_get_dflt_router(const struct in6_addr *addr,
91 struct net_device *dev);
92 struct rt6_info *rt6_add_dflt_router(const struct in6_addr *gwaddr,
93 struct net_device *dev, unsigned int pref);
95 void rt6_purge_dflt_routers(struct net *net);
97 int rt6_route_rcv(struct net_device *dev, u8 *opt, int len,
98 const struct in6_addr *gwaddr);
100 void ip6_update_pmtu(struct sk_buff *skb, struct net *net, __be32 mtu, int oif,
102 void ip6_sk_update_pmtu(struct sk_buff *skb, struct sock *sk, __be32 mtu);
103 void ip6_redirect(struct sk_buff *skb, struct net *net, int oif, u32 mark);
104 void ip6_redirect_no_header(struct sk_buff *skb, struct net *net, int oif,
106 void ip6_sk_redirect(struct sk_buff *skb, struct sock *sk);
108 struct netlink_callback;
110 struct rt6_rtnl_dump_arg {
112 struct netlink_callback *cb;
116 int rt6_dump_route(struct rt6_info *rt, void *p_arg);
117 void rt6_ifdown(struct net *net, struct net_device *dev);
118 void rt6_mtu_change(struct net_device *dev, unsigned int mtu);
119 void rt6_remove_prefsrc(struct inet6_ifaddr *ifp);
123 * Store a destination cache entry in a socket
125 static inline void __ip6_dst_store(struct sock *sk, struct dst_entry *dst,
126 const struct in6_addr *daddr,
127 const struct in6_addr *saddr)
129 struct ipv6_pinfo *np = inet6_sk(sk);
130 struct rt6_info *rt = (struct rt6_info *) dst;
132 sk_setup_caps(sk, dst);
133 np->daddr_cache = daddr;
134 #ifdef CONFIG_IPV6_SUBTREES
135 np->saddr_cache = saddr;
137 np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
140 static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst,
141 struct in6_addr *daddr, struct in6_addr *saddr)
143 spin_lock(&sk->sk_dst_lock);
144 __ip6_dst_store(sk, dst, daddr, saddr);
145 spin_unlock(&sk->sk_dst_lock);
148 static inline bool ipv6_unicast_destination(const struct sk_buff *skb)
150 struct rt6_info *rt = (struct rt6_info *) skb_dst(skb);
152 return rt->rt6i_flags & RTF_LOCAL;
155 int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *));
157 static inline int ip6_skb_dst_mtu(struct sk_buff *skb)
159 struct ipv6_pinfo *np = skb->sk ? inet6_sk(skb->sk) : NULL;
161 return (np && np->pmtudisc >= IPV6_PMTUDISC_PROBE) ?
162 skb_dst(skb)->dev->mtu : dst_mtu(skb_dst(skb));
165 static inline bool ip6_sk_accept_pmtu(const struct sock *sk)
167 return inet6_sk(sk)->pmtudisc != IPV6_PMTUDISC_INTERFACE;
170 static inline struct in6_addr *rt6_nexthop(struct rt6_info *rt)
172 return &rt->rt6i_gateway;