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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _NET_IP6_ROUTE_H
2#define _NET_IP6_ROUTE_H
3
YOSHIFUJI Hideaki70ceb4f2006-03-20 17:06:24 -08004struct route_info {
5 __u8 type;
6 __u8 length;
7 __u8 prefix_len;
8#if defined(__BIG_ENDIAN_BITFIELD)
9 __u8 reserved_h:3,
10 route_pref:2,
11 reserved_l:3;
12#elif defined(__LITTLE_ENDIAN_BITFIELD)
13 __u8 reserved_l:3,
14 route_pref:2,
15 reserved_h:3;
16#endif
Al Viroe69a4adc2006-11-14 20:56:00 -080017 __be32 lifetime;
YOSHIFUJI Hideaki70ceb4f2006-03-20 17:06:24 -080018 __u8 prefix[0]; /* 0,8 or 16 */
19};
20
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#include <net/flow.h>
22#include <net/ip6_fib.h>
23#include <net/sock.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include <linux/ip.h>
25#include <linux/ipv6.h>
YOSHIFUJI Hideaki / 吉藤英明9bb5a142013-01-17 12:53:48 +000026#include <linux/route.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +090028#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
YOSHIFUJI Hideaki77d16f42006-08-23 17:25:05 -070034
YOSHIFUJI Hideaki / 吉藤英明0c9a2ac2010-03-07 00:14:44 +000035/*
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.
42 */
43static inline int rt6_srcprefs2flags(unsigned int srcprefs)
44{
45 /* No need to bitmask because srcprefs have only 3 bits. */
46 return srcprefs << 3;
47}
48
49static inline unsigned int rt6_flags2srcprefs(int flags)
50{
51 return (flags >> 3) & 7;
52}
Linus Torvalds1da177e2005-04-16 15:20:36 -070053
David S. Millerfbfe95a2012-06-08 23:24:18 -070054extern void rt6_bind_peer(struct rt6_info *rt, int create);
David S. Millerb3419362010-11-30 12:27:11 -080055
David S. Millerfbfe95a2012-06-08 23:24:18 -070056static inline struct inet_peer *__rt6_get_peer(struct rt6_info *rt, int create)
David S. Miller15c05422010-12-02 10:16:06 -080057{
David S. Miller97bab732012-06-09 22:36:36 -070058 if (rt6_has_peer(rt))
59 return rt6_peer_ptr(rt);
David S. Miller15c05422010-12-02 10:16:06 -080060
David S. Millerfbfe95a2012-06-08 23:24:18 -070061 rt6_bind_peer(rt, create);
David S. Miller55afaba2012-06-11 15:52:29 -070062 return (rt6_has_peer(rt) ? rt6_peer_ptr(rt) : NULL);
David S. Miller15c05422010-12-02 10:16:06 -080063}
64
David S. Millerfbfe95a2012-06-08 23:24:18 -070065static inline struct inet_peer *rt6_get_peer(struct rt6_info *rt)
66{
67 return __rt6_get_peer(rt, 0);
68}
69
70static inline struct inet_peer *rt6_get_peer_create(struct rt6_info *rt)
71{
72 return __rt6_get_peer(rt, 1);
73}
74
Linus Torvalds1da177e2005-04-16 15:20:36 -070075extern void ip6_route_input(struct sk_buff *skb);
76
Daniel Lezcano4591db42008-03-05 10:48:10 -080077extern struct dst_entry * ip6_route_output(struct net *net,
Florian Westphal9c7a4f92011-03-22 19:17:36 -070078 const struct sock *sk,
David S. Miller4c9483b2011-03-12 16:22:43 -050079 struct flowi6 *fl6);
Florian Westphalea6e5742011-09-05 16:05:44 +020080extern struct dst_entry * ip6_route_lookup(struct net *net,
81 struct flowi6 *fl6, int flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -070082
Daniel Lezcano433d49c2007-12-07 00:43:48 -080083extern int ip6_route_init(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -070084extern void ip6_route_cleanup(void);
85
Daniel Lezcano55786892008-03-04 13:47:47 -080086extern int ipv6_route_ioctl(struct net *net,
87 unsigned int cmd,
88 void __user *arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -070089
Thomas Graf86872cb2006-08-22 00:01:08 -070090extern int ip6_route_add(struct fib6_config *cfg);
Thomas Graf40e22e82006-08-22 00:00:45 -070091extern int ip6_ins_rt(struct rt6_info *);
Thomas Grafe0a1ad732006-08-22 00:00:21 -070092extern int ip6_del_rt(struct rt6_info *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070093
Daniel Walterc3968a82011-04-13 21:10:57 +000094extern int ip6_route_get_saddr(struct net *net,
95 struct rt6_info *rt,
Eric Dumazetb71d1d42011-04-22 04:53:02 +000096 const struct in6_addr *daddr,
Daniel Walterc3968a82011-04-13 21:10:57 +000097 unsigned int prefs,
98 struct in6_addr *saddr);
99
Daniel Lezcano606a2b42008-03-04 13:45:59 -0800100extern struct rt6_info *rt6_lookup(struct net *net,
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900101 const struct in6_addr *daddr,
102 const struct in6_addr *saddr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 int oif, int flags);
104
YOSHIFUJI Hideaki3b009442007-12-06 16:11:48 -0800105extern struct dst_entry *icmp6_dst_alloc(struct net_device *dev,
David S. Miller87a11572011-12-06 17:04:13 -0500106 struct flowi6 *fl6);
Stephen Hemminger3d0f24a2008-07-22 14:35:50 -0700107extern int icmp6_dst_gc(void);
YOSHIFUJI Hideaki3b009442007-12-06 16:11:48 -0800108
Daniel Lezcano63152fc2008-03-03 23:31:11 -0800109extern void fib6_force_start_gc(struct net *net);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110
111extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
112 const struct in6_addr *addr,
David S. Miller8f031512011-12-06 16:48:14 -0500113 bool anycast);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114
YOSHIFUJI Hideaki6b75d092008-03-10 06:00:30 -0400115extern int ip6_dst_hoplimit(struct dst_entry *dst);
116
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117/*
118 * support functions for ND
119 *
120 */
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000121extern struct rt6_info * rt6_get_dflt_router(const struct in6_addr *addr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 struct net_device *dev);
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000123extern struct rt6_info * rt6_add_dflt_router(const struct in6_addr *gwaddr,
YOSHIFUJI Hideakiebacaaa2006-03-20 17:04:53 -0800124 struct net_device *dev,
125 unsigned int pref);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126
Daniel Lezcano7b4da532008-03-04 13:47:14 -0800127extern void rt6_purge_dflt_routers(struct net *net);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128
YOSHIFUJI Hideaki70ceb4f2006-03-20 17:06:24 -0800129extern int rt6_route_rcv(struct net_device *dev,
130 u8 *opt, int len,
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000131 const struct in6_addr *gwaddr);
YOSHIFUJI Hideaki70ceb4f2006-03-20 17:06:24 -0800132
David S. Miller81aded22012-06-15 14:54:11 -0700133extern void ip6_update_pmtu(struct sk_buff *skb, struct net *net, __be32 mtu,
134 int oif, u32 mark);
135extern void ip6_sk_update_pmtu(struct sk_buff *skb, struct sock *sk,
136 __be32 mtu);
David S. Miller3a5ad2e2012-07-12 00:08:07 -0700137extern void ip6_redirect(struct sk_buff *skb, struct net *net, int oif, u32 mark);
138extern void ip6_sk_redirect(struct sk_buff *skb, struct sock *sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140struct netlink_callback;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000142struct rt6_rtnl_dump_arg {
Patrick McHardy1b43af52006-08-10 23:11:17 -0700143 struct sk_buff *skb;
144 struct netlink_callback *cb;
Brian Haley191cd582008-08-14 15:33:21 -0700145 struct net *net;
Patrick McHardy1b43af52006-08-10 23:11:17 -0700146};
147
148extern int rt6_dump_route(struct rt6_info *rt, void *p_arg);
Daniel Lezcanof3db4852008-03-03 23:27:06 -0800149extern void rt6_ifdown(struct net *net, struct net_device *dev);
Eric Dumazet95c96172012-04-15 05:58:06 +0000150extern void rt6_mtu_change(struct net_device *dev, unsigned int mtu);
Daniel Walterc3968a82011-04-13 21:10:57 +0000151extern void rt6_remove_prefsrc(struct inet6_ifaddr *ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153
154/*
155 * Store a destination cache entry in a socket
156 */
Herbert Xu497c6152006-07-30 20:19:33 -0700157static inline void __ip6_dst_store(struct sock *sk, struct dst_entry *dst,
Eric Dumazetd3818c92012-07-17 21:38:04 +0000158 const struct in6_addr *daddr,
159 const struct in6_addr *saddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160{
161 struct ipv6_pinfo *np = inet6_sk(sk);
162 struct rt6_info *rt = (struct rt6_info *) dst;
163
Herbert Xuf83ef8c2006-06-30 13:37:03 -0700164 sk_setup_caps(sk, dst);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 np->daddr_cache = daddr;
YOSHIFUJI Hideaki8e1ef0a2006-08-29 17:15:09 -0700166#ifdef CONFIG_IPV6_SUBTREES
167 np->saddr_cache = saddr;
168#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
Herbert Xu497c6152006-07-30 20:19:33 -0700170}
171
172static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst,
YOSHIFUJI Hideaki8e1ef0a2006-08-29 17:15:09 -0700173 struct in6_addr *daddr, struct in6_addr *saddr)
Herbert Xu497c6152006-07-30 20:19:33 -0700174{
Eric Dumazetb6c67122010-04-08 23:03:29 +0000175 spin_lock(&sk->sk_dst_lock);
YOSHIFUJI Hideaki8e1ef0a2006-08-29 17:15:09 -0700176 __ip6_dst_store(sk, dst, daddr, saddr);
Eric Dumazetb6c67122010-04-08 23:03:29 +0000177 spin_unlock(&sk->sk_dst_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178}
179
Eric Dumazeta50feda2012-05-18 18:57:34 +0000180static inline bool ipv6_unicast_destination(const struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181{
Eric Dumazetadf30902009-06-02 05:19:30 +0000182 struct rt6_info *rt = (struct rt6_info *) skb_dst(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183
184 return rt->rt6i_flags & RTF_LOCAL;
185}
186
David Stevensad0081e2010-12-17 11:42:42 +0000187int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *));
188
189static inline int ip6_skb_dst_mtu(struct sk_buff *skb)
190{
191 struct ipv6_pinfo *np = skb->sk ? inet6_sk(skb->sk) : NULL;
192
193 return (np && np->pmtudisc == IPV6_PMTUDISC_PROBE) ?
194 skb_dst(skb)->dev->mtu : dst_mtu(skb_dst(skb));
195}
196
YOSHIFUJI Hideaki / 吉藤英明9bb5a142013-01-17 12:53:48 +0000197static inline struct in6_addr *rt6_nexthop(struct rt6_info *rt, struct in6_addr *dest)
198{
199 if (rt->rt6i_flags & RTF_GATEWAY)
200 return &rt->rt6i_gateway;
201 return dest;
202}
203
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204#endif