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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
6#define IP6_RT_PRIO_KERN 512
Linus Torvalds1da177e2005-04-16 15:20:36 -07007
YOSHIFUJI Hideaki70ceb4f2006-03-20 17:06:24 -08008struct route_info {
9 __u8 type;
10 __u8 length;
11 __u8 prefix_len;
12#if defined(__BIG_ENDIAN_BITFIELD)
13 __u8 reserved_h:3,
14 route_pref:2,
15 reserved_l:3;
16#elif defined(__LITTLE_ENDIAN_BITFIELD)
17 __u8 reserved_l:3,
18 route_pref:2,
19 reserved_h:3;
20#endif
Al Viroe69a4adc2006-11-14 20:56:00 -080021 __be32 lifetime;
YOSHIFUJI Hideaki70ceb4f2006-03-20 17:06:24 -080022 __u8 prefix[0]; /* 0,8 or 16 */
23};
24
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#ifdef __KERNEL__
26
27#include <net/flow.h>
28#include <net/ip6_fib.h>
29#include <net/sock.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#include <linux/ip.h>
31#include <linux/ipv6.h>
32
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +090033#define RT6_LOOKUP_F_IFACE 0x00000001
34#define RT6_LOOKUP_F_REACHABLE 0x00000002
35#define RT6_LOOKUP_F_HAS_SADDR 0x00000004
36#define RT6_LOOKUP_F_SRCPREF_TMP 0x00000008
37#define RT6_LOOKUP_F_SRCPREF_PUBLIC 0x00000010
38#define RT6_LOOKUP_F_SRCPREF_COA 0x00000020
YOSHIFUJI Hideaki77d16f42006-08-23 17:25:05 -070039
YOSHIFUJI Hideaki / 吉藤英明0c9a2ac2010-03-07 00:14:44 +000040/*
41 * rt6_srcprefs2flags() and rt6_flags2srcprefs() translate
42 * between IPV6_ADDR_PREFERENCES socket option values
43 * IPV6_PREFER_SRC_TMP = 0x1
44 * IPV6_PREFER_SRC_PUBLIC = 0x2
45 * IPV6_PREFER_SRC_COA = 0x4
46 * and above RT6_LOOKUP_F_SRCPREF_xxx flags.
47 */
48static inline int rt6_srcprefs2flags(unsigned int srcprefs)
49{
50 /* No need to bitmask because srcprefs have only 3 bits. */
51 return srcprefs << 3;
52}
53
54static inline unsigned int rt6_flags2srcprefs(int flags)
55{
56 return (flags >> 3) & 7;
57}
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
Linus Torvalds1da177e2005-04-16 15:20:36 -070059extern void ip6_route_input(struct sk_buff *skb);
60
Daniel Lezcano4591db42008-03-05 10:48:10 -080061extern struct dst_entry * ip6_route_output(struct net *net,
62 struct sock *sk,
Linus Torvalds1da177e2005-04-16 15:20:36 -070063 struct flowi *fl);
64
Daniel Lezcano433d49c2007-12-07 00:43:48 -080065extern int ip6_route_init(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -070066extern void ip6_route_cleanup(void);
67
Daniel Lezcano55786892008-03-04 13:47:47 -080068extern int ipv6_route_ioctl(struct net *net,
69 unsigned int cmd,
70 void __user *arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -070071
Thomas Graf86872cb2006-08-22 00:01:08 -070072extern int ip6_route_add(struct fib6_config *cfg);
Thomas Graf40e22e82006-08-22 00:00:45 -070073extern int ip6_ins_rt(struct rt6_info *);
Thomas Grafe0a1ad732006-08-22 00:00:21 -070074extern int ip6_del_rt(struct rt6_info *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070075
Daniel Lezcano606a2b42008-03-04 13:45:59 -080076extern struct rt6_info *rt6_lookup(struct net *net,
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +090077 const struct in6_addr *daddr,
78 const struct in6_addr *saddr,
Linus Torvalds1da177e2005-04-16 15:20:36 -070079 int oif, int flags);
80
YOSHIFUJI Hideaki3b009442007-12-06 16:11:48 -080081extern struct dst_entry *icmp6_dst_alloc(struct net_device *dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -070082 struct neighbour *neigh,
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +090083 const struct in6_addr *addr);
Stephen Hemminger3d0f24a2008-07-22 14:35:50 -070084extern int icmp6_dst_gc(void);
YOSHIFUJI Hideaki3b009442007-12-06 16:11:48 -080085
Daniel Lezcano63152fc2008-03-03 23:31:11 -080086extern void fib6_force_start_gc(struct net *net);
Linus Torvalds1da177e2005-04-16 15:20:36 -070087
88extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
89 const struct in6_addr *addr,
90 int anycast);
91
YOSHIFUJI Hideaki6b75d092008-03-10 06:00:30 -040092extern int ip6_dst_hoplimit(struct dst_entry *dst);
93
Linus Torvalds1da177e2005-04-16 15:20:36 -070094/*
95 * support functions for ND
96 *
97 */
98extern struct rt6_info * rt6_get_dflt_router(struct in6_addr *addr,
99 struct net_device *dev);
100extern struct rt6_info * rt6_add_dflt_router(struct in6_addr *gwaddr,
YOSHIFUJI Hideakiebacaaa2006-03-20 17:04:53 -0800101 struct net_device *dev,
102 unsigned int pref);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103
Daniel Lezcano7b4da532008-03-04 13:47:14 -0800104extern void rt6_purge_dflt_routers(struct net *net);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105
YOSHIFUJI Hideaki70ceb4f2006-03-20 17:06:24 -0800106extern int rt6_route_rcv(struct net_device *dev,
107 u8 *opt, int len,
108 struct in6_addr *gwaddr);
109
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110extern void rt6_redirect(struct in6_addr *dest,
YOSHIFUJI Hideaki5e032e32006-08-23 17:12:24 -0700111 struct in6_addr *src,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112 struct in6_addr *saddr,
113 struct neighbour *neigh,
114 u8 *lladdr,
115 int on_link);
116
117extern void rt6_pmtu_discovery(struct in6_addr *daddr,
118 struct in6_addr *saddr,
119 struct net_device *dev,
120 u32 pmtu);
121
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122struct netlink_callback;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000124struct rt6_rtnl_dump_arg {
Patrick McHardy1b43af52006-08-10 23:11:17 -0700125 struct sk_buff *skb;
126 struct netlink_callback *cb;
Brian Haley191cd582008-08-14 15:33:21 -0700127 struct net *net;
Patrick McHardy1b43af52006-08-10 23:11:17 -0700128};
129
130extern int rt6_dump_route(struct rt6_info *rt, void *p_arg);
Daniel Lezcanof3db4852008-03-03 23:27:06 -0800131extern void rt6_ifdown(struct net *net, struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132extern void rt6_mtu_change(struct net_device *dev, unsigned mtu);
133
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134
135/*
136 * Store a destination cache entry in a socket
137 */
Herbert Xu497c6152006-07-30 20:19:33 -0700138static inline void __ip6_dst_store(struct sock *sk, struct dst_entry *dst,
YOSHIFUJI Hideaki8e1ef0a2006-08-29 17:15:09 -0700139 struct in6_addr *daddr, struct in6_addr *saddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140{
141 struct ipv6_pinfo *np = inet6_sk(sk);
142 struct rt6_info *rt = (struct rt6_info *) dst;
143
Herbert Xuf83ef8c2006-06-30 13:37:03 -0700144 sk_setup_caps(sk, dst);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145 np->daddr_cache = daddr;
YOSHIFUJI Hideaki8e1ef0a2006-08-29 17:15:09 -0700146#ifdef CONFIG_IPV6_SUBTREES
147 np->saddr_cache = saddr;
148#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149 np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
Herbert Xu497c6152006-07-30 20:19:33 -0700150}
151
152static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst,
YOSHIFUJI Hideaki8e1ef0a2006-08-29 17:15:09 -0700153 struct in6_addr *daddr, struct in6_addr *saddr)
Herbert Xu497c6152006-07-30 20:19:33 -0700154{
Eric Dumazetb6c67122010-04-08 23:03:29 +0000155 spin_lock(&sk->sk_dst_lock);
YOSHIFUJI Hideaki8e1ef0a2006-08-29 17:15:09 -0700156 __ip6_dst_store(sk, dst, daddr, saddr);
Eric Dumazetb6c67122010-04-08 23:03:29 +0000157 spin_unlock(&sk->sk_dst_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158}
159
160static inline int ipv6_unicast_destination(struct sk_buff *skb)
161{
Eric Dumazetadf30902009-06-02 05:19:30 +0000162 struct rt6_info *rt = (struct rt6_info *) skb_dst(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163
164 return rt->rt6i_flags & RTF_LOCAL;
165}
166
167#endif
168#endif