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
37 /* We do not (yet ?) support IPv6 jumbograms (RFC 2675)
38 * Unlike IPv4, hdr->seg_len doesn't include the IPv6 header
40 #define IP6_MAX_MTU (0xFFFF + sizeof(struct ipv6hdr))
43 * rt6_srcprefs2flags() and rt6_flags2srcprefs() translate
44 * between IPV6_ADDR_PREFERENCES socket option values
45 * IPV6_PREFER_SRC_TMP = 0x1
46 * IPV6_PREFER_SRC_PUBLIC = 0x2
47 * IPV6_PREFER_SRC_COA = 0x4
48 * and above RT6_LOOKUP_F_SRCPREF_xxx flags.
50 static inline int rt6_srcprefs2flags(unsigned int srcprefs)
52 /* No need to bitmask because srcprefs have only 3 bits. */
56 static inline unsigned int rt6_flags2srcprefs(int flags)
58 return (flags >> 3) & 7;
61 extern void rt6_bind_peer(struct rt6_info *rt,
64 static inline struct inet_peer *rt6_get_peer(struct rt6_info *rt)
73 extern void ip6_route_input(struct sk_buff *skb);
75 extern struct dst_entry * ip6_route_output(struct net *net,
76 const struct sock *sk,
79 extern int ip6_route_init(void);
80 extern void ip6_route_cleanup(void);
82 extern int ipv6_route_ioctl(struct net *net,
86 extern int ip6_route_add(struct fib6_config *cfg);
87 extern int ip6_ins_rt(struct rt6_info *);
88 extern int ip6_del_rt(struct rt6_info *);
90 extern int ip6_route_get_saddr(struct net *net,
92 const struct in6_addr *daddr,
94 struct in6_addr *saddr);
96 extern struct rt6_info *rt6_lookup(struct net *net,
97 const struct in6_addr *daddr,
98 const struct in6_addr *saddr,
101 extern struct dst_entry *icmp6_dst_alloc(struct net_device *dev,
102 struct neighbour *neigh,
103 const struct in6_addr *addr);
104 extern int icmp6_dst_gc(void);
106 extern void fib6_force_start_gc(struct net *net);
108 extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
109 const struct in6_addr *addr,
112 extern int ip6_dst_hoplimit(struct dst_entry *dst);
115 * support functions for ND
118 extern struct rt6_info * rt6_get_dflt_router(const struct in6_addr *addr,
119 struct net_device *dev);
120 extern struct rt6_info * rt6_add_dflt_router(const struct in6_addr *gwaddr,
121 struct net_device *dev,
124 extern void rt6_purge_dflt_routers(struct net *net);
126 extern int rt6_route_rcv(struct net_device *dev,
128 const struct in6_addr *gwaddr);
130 extern void rt6_redirect(const struct in6_addr *dest,
131 const struct in6_addr *src,
132 const struct in6_addr *saddr,
133 struct neighbour *neigh,
137 extern void rt6_pmtu_discovery(const struct in6_addr *daddr,
138 const struct in6_addr *saddr,
139 struct net_device *dev,
142 struct netlink_callback;
144 struct rt6_rtnl_dump_arg {
146 struct netlink_callback *cb;
150 extern int rt6_dump_route(struct rt6_info *rt, void *p_arg);
151 extern void rt6_ifdown(struct net *net, struct net_device *dev);
152 extern void rt6_mtu_change(struct net_device *dev, unsigned mtu);
153 extern void rt6_remove_prefsrc(struct inet6_ifaddr *ifp);
157 * Store a destination cache entry in a socket
159 static inline void __ip6_dst_store(struct sock *sk, struct dst_entry *dst,
160 struct in6_addr *daddr, struct in6_addr *saddr)
162 struct ipv6_pinfo *np = inet6_sk(sk);
163 struct rt6_info *rt = (struct rt6_info *) dst;
165 sk_setup_caps(sk, dst);
166 np->daddr_cache = daddr;
167 #ifdef CONFIG_IPV6_SUBTREES
168 np->saddr_cache = saddr;
170 np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
173 static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst,
174 struct in6_addr *daddr, struct in6_addr *saddr)
176 spin_lock(&sk->sk_dst_lock);
177 __ip6_dst_store(sk, dst, daddr, saddr);
178 spin_unlock(&sk->sk_dst_lock);
181 static inline int ipv6_unicast_destination(struct sk_buff *skb)
183 struct rt6_info *rt = (struct rt6_info *) skb_dst(skb);
185 return rt->rt6i_flags & RTF_LOCAL;
188 int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *));
190 static inline int ip6_skb_dst_mtu(struct sk_buff *skb)
192 struct ipv6_pinfo *np = skb->sk ? inet6_sk(skb->sk) : NULL;
194 return (np && np->pmtudisc == IPV6_PMTUDISC_PROBE) ?
195 skb_dst(skb)->dev->mtu : dst_mtu(skb_dst(skb));