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 static inline bool ipv6_anycast_destination(const struct sk_buff
*skb
)
157 struct rt6_info
*rt
= (struct rt6_info
*) skb_dst(skb
);
159 return rt
->rt6i_flags
& RTF_ANYCAST
;
162 int ip6_fragment(struct sk_buff
*skb
, int (*output
)(struct sk_buff
*));
164 static inline int ip6_skb_dst_mtu(struct sk_buff
*skb
)
166 struct ipv6_pinfo
*np
= skb
->sk
? inet6_sk(skb
->sk
) : NULL
;
168 return (np
&& np
->pmtudisc
>= IPV6_PMTUDISC_PROBE
) ?
169 skb_dst(skb
)->dev
->mtu
: dst_mtu(skb_dst(skb
));
172 static inline bool ip6_sk_accept_pmtu(const struct sock
*sk
)
174 return inet6_sk(sk
)->pmtudisc
!= IPV6_PMTUDISC_INTERFACE
&&
175 inet6_sk(sk
)->pmtudisc
!= IPV6_PMTUDISC_OMIT
;
178 static inline bool ip6_sk_local_df(const struct sock
*sk
)
180 return inet6_sk(sk
)->pmtudisc
< IPV6_PMTUDISC_DO
||
181 inet6_sk(sk
)->pmtudisc
== IPV6_PMTUDISC_OMIT
;
184 static inline struct in6_addr
*rt6_nexthop(struct rt6_info
*rt
)
186 return &rt
->rt6i_gateway
;
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