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1da177e4 LT |
1 | #ifndef _NET_IP6_ROUTE_H |
2 | #define _NET_IP6_ROUTE_H | |
3 | ||
1da177e4 LT |
4 | #define IP6_RT_PRIO_USER 1024 |
5 | #define IP6_RT_PRIO_ADDRCONF 256 | |
1da177e4 | 6 | |
70ceb4f5 YH |
7 | struct route_info { |
8 | __u8 type; | |
9 | __u8 length; | |
10 | __u8 prefix_len; | |
11 | #if defined(__BIG_ENDIAN_BITFIELD) | |
12 | __u8 reserved_h:3, | |
13 | route_pref:2, | |
14 | reserved_l:3; | |
15 | #elif defined(__LITTLE_ENDIAN_BITFIELD) | |
16 | __u8 reserved_l:3, | |
17 | route_pref:2, | |
18 | reserved_h:3; | |
19 | #endif | |
e69a4adc | 20 | __be32 lifetime; |
70ceb4f5 YH |
21 | __u8 prefix[0]; /* 0,8 or 16 */ |
22 | }; | |
23 | ||
1da177e4 LT |
24 | #include <net/flow.h> |
25 | #include <net/ip6_fib.h> | |
26 | #include <net/sock.h> | |
1da177e4 LT |
27 | #include <linux/ip.h> |
28 | #include <linux/ipv6.h> | |
29 | ||
7cbca67c YH |
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 | |
77d16f45 | 36 | |
0c9a2ac1 YH |
37 | /* |
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. | |
44 | */ | |
45 | static inline int rt6_srcprefs2flags(unsigned int srcprefs) | |
46 | { | |
47 | /* No need to bitmask because srcprefs have only 3 bits. */ | |
48 | return srcprefs << 3; | |
49 | } | |
50 | ||
51 | static inline unsigned int rt6_flags2srcprefs(int flags) | |
52 | { | |
53 | return (flags >> 3) & 7; | |
54 | } | |
1da177e4 | 55 | |
b3419363 DM |
56 | extern void rt6_bind_peer(struct rt6_info *rt, |
57 | int create); | |
58 | ||
15c05425 DM |
59 | static inline struct inet_peer *rt6_get_peer(struct rt6_info *rt) |
60 | { | |
61 | if (rt->rt6i_peer) | |
62 | return rt->rt6i_peer; | |
63 | ||
64 | rt6_bind_peer(rt, 0); | |
65 | return rt->rt6i_peer; | |
66 | } | |
67 | ||
1da177e4 LT |
68 | extern void ip6_route_input(struct sk_buff *skb); |
69 | ||
4591db4f | 70 | extern struct dst_entry * ip6_route_output(struct net *net, |
9c7a4f9c | 71 | const struct sock *sk, |
4c9483b2 | 72 | struct flowi6 *fl6); |
1da177e4 | 73 | |
433d49c3 | 74 | extern int ip6_route_init(void); |
1da177e4 LT |
75 | extern void ip6_route_cleanup(void); |
76 | ||
5578689a DL |
77 | extern int ipv6_route_ioctl(struct net *net, |
78 | unsigned int cmd, | |
79 | void __user *arg); | |
1da177e4 | 80 | |
86872cb5 | 81 | extern int ip6_route_add(struct fib6_config *cfg); |
40e22e8f | 82 | extern int ip6_ins_rt(struct rt6_info *); |
e0a1ad73 | 83 | extern int ip6_del_rt(struct rt6_info *); |
1da177e4 | 84 | |
c3968a85 DW |
85 | extern int ip6_route_get_saddr(struct net *net, |
86 | struct rt6_info *rt, | |
b71d1d42 | 87 | const struct in6_addr *daddr, |
c3968a85 DW |
88 | unsigned int prefs, |
89 | struct in6_addr *saddr); | |
90 | ||
606a2b48 | 91 | extern struct rt6_info *rt6_lookup(struct net *net, |
9acd9f3a YH |
92 | const struct in6_addr *daddr, |
93 | const struct in6_addr *saddr, | |
1da177e4 LT |
94 | int oif, int flags); |
95 | ||
3b00944c | 96 | extern struct dst_entry *icmp6_dst_alloc(struct net_device *dev, |
1da177e4 | 97 | struct neighbour *neigh, |
9acd9f3a | 98 | const struct in6_addr *addr); |
3d0f24a7 | 99 | extern int icmp6_dst_gc(void); |
3b00944c | 100 | |
63152fc0 | 101 | extern void fib6_force_start_gc(struct net *net); |
1da177e4 LT |
102 | |
103 | extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev, | |
104 | const struct in6_addr *addr, | |
105 | int anycast); | |
106 | ||
6b75d090 YH |
107 | extern int ip6_dst_hoplimit(struct dst_entry *dst); |
108 | ||
1da177e4 LT |
109 | /* |
110 | * support functions for ND | |
111 | * | |
112 | */ | |
b71d1d42 | 113 | extern struct rt6_info * rt6_get_dflt_router(const struct in6_addr *addr, |
1da177e4 | 114 | struct net_device *dev); |
b71d1d42 | 115 | extern struct rt6_info * rt6_add_dflt_router(const struct in6_addr *gwaddr, |
ebacaaa0 YH |
116 | struct net_device *dev, |
117 | unsigned int pref); | |
1da177e4 | 118 | |
7b4da532 | 119 | extern void rt6_purge_dflt_routers(struct net *net); |
1da177e4 | 120 | |
70ceb4f5 YH |
121 | extern int rt6_route_rcv(struct net_device *dev, |
122 | u8 *opt, int len, | |
b71d1d42 | 123 | const struct in6_addr *gwaddr); |
70ceb4f5 | 124 | |
b71d1d42 ED |
125 | extern void rt6_redirect(const struct in6_addr *dest, |
126 | const struct in6_addr *src, | |
127 | const struct in6_addr *saddr, | |
1da177e4 LT |
128 | struct neighbour *neigh, |
129 | u8 *lladdr, | |
130 | int on_link); | |
131 | ||
b71d1d42 ED |
132 | extern void rt6_pmtu_discovery(const struct in6_addr *daddr, |
133 | const struct in6_addr *saddr, | |
1da177e4 LT |
134 | struct net_device *dev, |
135 | u32 pmtu); | |
136 | ||
1da177e4 | 137 | struct netlink_callback; |
1da177e4 | 138 | |
fd2c3ef7 | 139 | struct rt6_rtnl_dump_arg { |
1b43af54 PM |
140 | struct sk_buff *skb; |
141 | struct netlink_callback *cb; | |
191cd582 | 142 | struct net *net; |
1b43af54 PM |
143 | }; |
144 | ||
145 | extern int rt6_dump_route(struct rt6_info *rt, void *p_arg); | |
f3db4851 | 146 | extern void rt6_ifdown(struct net *net, struct net_device *dev); |
1da177e4 | 147 | extern void rt6_mtu_change(struct net_device *dev, unsigned mtu); |
c3968a85 | 148 | extern void rt6_remove_prefsrc(struct inet6_ifaddr *ifp); |
1da177e4 | 149 | |
1da177e4 LT |
150 | |
151 | /* | |
152 | * Store a destination cache entry in a socket | |
153 | */ | |
497c615a | 154 | static inline void __ip6_dst_store(struct sock *sk, struct dst_entry *dst, |
8e1ef0a9 | 155 | struct in6_addr *daddr, struct in6_addr *saddr) |
1da177e4 LT |
156 | { |
157 | struct ipv6_pinfo *np = inet6_sk(sk); | |
158 | struct rt6_info *rt = (struct rt6_info *) dst; | |
159 | ||
f83ef8c0 | 160 | sk_setup_caps(sk, dst); |
1da177e4 | 161 | np->daddr_cache = daddr; |
8e1ef0a9 YH |
162 | #ifdef CONFIG_IPV6_SUBTREES |
163 | np->saddr_cache = saddr; | |
164 | #endif | |
1da177e4 | 165 | np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0; |
497c615a HX |
166 | } |
167 | ||
168 | static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst, | |
8e1ef0a9 | 169 | struct in6_addr *daddr, struct in6_addr *saddr) |
497c615a | 170 | { |
b6c6712a | 171 | spin_lock(&sk->sk_dst_lock); |
8e1ef0a9 | 172 | __ip6_dst_store(sk, dst, daddr, saddr); |
b6c6712a | 173 | spin_unlock(&sk->sk_dst_lock); |
1da177e4 LT |
174 | } |
175 | ||
176 | static inline int ipv6_unicast_destination(struct sk_buff *skb) | |
177 | { | |
adf30907 | 178 | struct rt6_info *rt = (struct rt6_info *) skb_dst(skb); |
1da177e4 LT |
179 | |
180 | return rt->rt6i_flags & RTF_LOCAL; | |
181 | } | |
182 | ||
ad0081e4 DS |
183 | int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *)); |
184 | ||
185 | static inline int ip6_skb_dst_mtu(struct sk_buff *skb) | |
186 | { | |
187 | struct ipv6_pinfo *np = skb->sk ? inet6_sk(skb->sk) : NULL; | |
188 | ||
189 | return (np && np->pmtudisc == IPV6_PMTUDISC_PROBE) ? | |
190 | skb_dst(skb)->dev->mtu : dst_mtu(skb_dst(skb)); | |
191 | } | |
192 | ||
1da177e4 | 193 | #endif |