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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _NET_IP6_ROUTE_H
2#define _NET_IP6_ROUTE_H
3
Linus Torvalds1da177e2005-04-16 15:20:36 -07004#define IP6_RT_PRIO_USER 1024
5#define IP6_RT_PRIO_ADDRCONF 256
Linus Torvalds1da177e2005-04-16 15:20:36 -07006
YOSHIFUJI Hideaki70ceb4f2006-03-20 17:06:24 -08007struct 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
Al Viroe69a4adc2006-11-14 20:56:00 -080020 __be32 lifetime;
YOSHIFUJI Hideaki70ceb4f2006-03-20 17:06:24 -080021 __u8 prefix[0]; /* 0,8 or 16 */
22};
23
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include <net/flow.h>
25#include <net/ip6_fib.h>
26#include <net/sock.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include <linux/ip.h>
28#include <linux/ipv6.h>
29
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +090030#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
YOSHIFUJI Hideaki77d16f42006-08-23 17:25:05 -070036
YOSHIFUJI Hideaki / 吉藤英明0c9a2ac2010-03-07 00:14:44 +000037/*
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 */
45static 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
51static inline unsigned int rt6_flags2srcprefs(int flags)
52{
53 return (flags >> 3) & 7;
54}
Linus Torvalds1da177e2005-04-16 15:20:36 -070055
David S. Millerb3419362010-11-30 12:27:11 -080056extern void rt6_bind_peer(struct rt6_info *rt,
57 int create);
58
David S. Miller15c05422010-12-02 10:16:06 -080059static 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070068extern void ip6_route_input(struct sk_buff *skb);
69
Daniel Lezcano4591db42008-03-05 10:48:10 -080070extern struct dst_entry * ip6_route_output(struct net *net,
Florian Westphal9c7a4f92011-03-22 19:17:36 -070071 const struct sock *sk,
David S. Miller4c9483b2011-03-12 16:22:43 -050072 struct flowi6 *fl6);
Linus Torvalds1da177e2005-04-16 15:20:36 -070073
Daniel Lezcano433d49c2007-12-07 00:43:48 -080074extern int ip6_route_init(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -070075extern void ip6_route_cleanup(void);
76
Daniel Lezcano55786892008-03-04 13:47:47 -080077extern int ipv6_route_ioctl(struct net *net,
78 unsigned int cmd,
79 void __user *arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -070080
Thomas Graf86872cb2006-08-22 00:01:08 -070081extern int ip6_route_add(struct fib6_config *cfg);
Thomas Graf40e22e82006-08-22 00:00:45 -070082extern int ip6_ins_rt(struct rt6_info *);
Thomas Grafe0a1ad732006-08-22 00:00:21 -070083extern int ip6_del_rt(struct rt6_info *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070084
Daniel Walterc3968a82011-04-13 21:10:57 +000085extern int ip6_route_get_saddr(struct net *net,
86 struct rt6_info *rt,
Eric Dumazetb71d1d42011-04-22 04:53:02 +000087 const struct in6_addr *daddr,
Daniel Walterc3968a82011-04-13 21:10:57 +000088 unsigned int prefs,
89 struct in6_addr *saddr);
90
Daniel Lezcano606a2b42008-03-04 13:45:59 -080091extern struct rt6_info *rt6_lookup(struct net *net,
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +090092 const struct in6_addr *daddr,
93 const struct in6_addr *saddr,
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 int oif, int flags);
95
YOSHIFUJI Hideaki3b009442007-12-06 16:11:48 -080096extern struct dst_entry *icmp6_dst_alloc(struct net_device *dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -070097 struct neighbour *neigh,
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +090098 const struct in6_addr *addr);
Stephen Hemminger3d0f24a2008-07-22 14:35:50 -070099extern int icmp6_dst_gc(void);
YOSHIFUJI Hideaki3b009442007-12-06 16:11:48 -0800100
Daniel Lezcano63152fc2008-03-03 23:31:11 -0800101extern void fib6_force_start_gc(struct net *net);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102
103extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
104 const struct in6_addr *addr,
105 int anycast);
106
YOSHIFUJI Hideaki6b75d092008-03-10 06:00:30 -0400107extern int ip6_dst_hoplimit(struct dst_entry *dst);
108
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109/*
110 * support functions for ND
111 *
112 */
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000113extern struct rt6_info * rt6_get_dflt_router(const struct in6_addr *addr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114 struct net_device *dev);
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000115extern struct rt6_info * rt6_add_dflt_router(const struct in6_addr *gwaddr,
YOSHIFUJI Hideakiebacaaa2006-03-20 17:04:53 -0800116 struct net_device *dev,
117 unsigned int pref);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118
Daniel Lezcano7b4da532008-03-04 13:47:14 -0800119extern void rt6_purge_dflt_routers(struct net *net);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120
YOSHIFUJI Hideaki70ceb4f2006-03-20 17:06:24 -0800121extern int rt6_route_rcv(struct net_device *dev,
122 u8 *opt, int len,
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000123 const struct in6_addr *gwaddr);
YOSHIFUJI Hideaki70ceb4f2006-03-20 17:06:24 -0800124
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000125extern void rt6_redirect(const struct in6_addr *dest,
126 const struct in6_addr *src,
127 const struct in6_addr *saddr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128 struct neighbour *neigh,
129 u8 *lladdr,
130 int on_link);
131
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000132extern void rt6_pmtu_discovery(const struct in6_addr *daddr,
133 const struct in6_addr *saddr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134 struct net_device *dev,
135 u32 pmtu);
136
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137struct netlink_callback;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000139struct rt6_rtnl_dump_arg {
Patrick McHardy1b43af52006-08-10 23:11:17 -0700140 struct sk_buff *skb;
141 struct netlink_callback *cb;
Brian Haley191cd582008-08-14 15:33:21 -0700142 struct net *net;
Patrick McHardy1b43af52006-08-10 23:11:17 -0700143};
144
145extern int rt6_dump_route(struct rt6_info *rt, void *p_arg);
Daniel Lezcanof3db4852008-03-03 23:27:06 -0800146extern void rt6_ifdown(struct net *net, struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147extern void rt6_mtu_change(struct net_device *dev, unsigned mtu);
Daniel Walterc3968a82011-04-13 21:10:57 +0000148extern void rt6_remove_prefsrc(struct inet6_ifaddr *ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150
151/*
152 * Store a destination cache entry in a socket
153 */
Herbert Xu497c6152006-07-30 20:19:33 -0700154static inline void __ip6_dst_store(struct sock *sk, struct dst_entry *dst,
YOSHIFUJI Hideaki8e1ef0a2006-08-29 17:15:09 -0700155 struct in6_addr *daddr, struct in6_addr *saddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156{
157 struct ipv6_pinfo *np = inet6_sk(sk);
158 struct rt6_info *rt = (struct rt6_info *) dst;
159
Herbert Xuf83ef8c2006-06-30 13:37:03 -0700160 sk_setup_caps(sk, dst);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161 np->daddr_cache = daddr;
YOSHIFUJI Hideaki8e1ef0a2006-08-29 17:15:09 -0700162#ifdef CONFIG_IPV6_SUBTREES
163 np->saddr_cache = saddr;
164#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
Herbert Xu497c6152006-07-30 20:19:33 -0700166}
167
168static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst,
YOSHIFUJI Hideaki8e1ef0a2006-08-29 17:15:09 -0700169 struct in6_addr *daddr, struct in6_addr *saddr)
Herbert Xu497c6152006-07-30 20:19:33 -0700170{
Eric Dumazetb6c67122010-04-08 23:03:29 +0000171 spin_lock(&sk->sk_dst_lock);
YOSHIFUJI Hideaki8e1ef0a2006-08-29 17:15:09 -0700172 __ip6_dst_store(sk, dst, daddr, saddr);
Eric Dumazetb6c67122010-04-08 23:03:29 +0000173 spin_unlock(&sk->sk_dst_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174}
175
176static inline int ipv6_unicast_destination(struct sk_buff *skb)
177{
Eric Dumazetadf30902009-06-02 05:19:30 +0000178 struct rt6_info *rt = (struct rt6_info *) skb_dst(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179
180 return rt->rt6i_flags & RTF_LOCAL;
181}
182
David Stevensad0081e2010-12-17 11:42:42 +0000183int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *));
184
185static 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193#endif