blob: 8552f0a2e85400433f9481e531e0ee88fe6b59ef [file] [log] [blame]
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#ifdef __KERNEL__
25
26#include <net/flow.h>
27#include <net/ip6_fib.h>
28#include <net/sock.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#include <linux/ip.h>
30#include <linux/ipv6.h>
31
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +090032#define RT6_LOOKUP_F_IFACE 0x00000001
33#define RT6_LOOKUP_F_REACHABLE 0x00000002
34#define RT6_LOOKUP_F_HAS_SADDR 0x00000004
35#define RT6_LOOKUP_F_SRCPREF_TMP 0x00000008
36#define RT6_LOOKUP_F_SRCPREF_PUBLIC 0x00000010
37#define RT6_LOOKUP_F_SRCPREF_COA 0x00000020
YOSHIFUJI Hideaki77d16f42006-08-23 17:25:05 -070038
YOSHIFUJI Hideaki / 吉藤英明0c9a2ac2010-03-07 00:14:44 +000039/*
40 * rt6_srcprefs2flags() and rt6_flags2srcprefs() translate
41 * between IPV6_ADDR_PREFERENCES socket option values
42 * IPV6_PREFER_SRC_TMP = 0x1
43 * IPV6_PREFER_SRC_PUBLIC = 0x2
44 * IPV6_PREFER_SRC_COA = 0x4
45 * and above RT6_LOOKUP_F_SRCPREF_xxx flags.
46 */
47static inline int rt6_srcprefs2flags(unsigned int srcprefs)
48{
49 /* No need to bitmask because srcprefs have only 3 bits. */
50 return srcprefs << 3;
51}
52
53static inline unsigned int rt6_flags2srcprefs(int flags)
54{
55 return (flags >> 3) & 7;
56}
Linus Torvalds1da177e2005-04-16 15:20:36 -070057
David S. Millerb3419362010-11-30 12:27:11 -080058extern void rt6_bind_peer(struct rt6_info *rt,
59 int create);
60
David S. Miller15c05422010-12-02 10:16:06 -080061static inline struct inet_peer *rt6_get_peer(struct rt6_info *rt)
62{
63 if (rt->rt6i_peer)
64 return rt->rt6i_peer;
65
66 rt6_bind_peer(rt, 0);
67 return rt->rt6i_peer;
68}
69
Linus Torvalds1da177e2005-04-16 15:20:36 -070070extern void ip6_route_input(struct sk_buff *skb);
71
Daniel Lezcano4591db42008-03-05 10:48:10 -080072extern struct dst_entry * ip6_route_output(struct net *net,
73 struct sock *sk,
Linus Torvalds1da177e2005-04-16 15:20:36 -070074 struct flowi *fl);
75
Daniel Lezcano433d49c2007-12-07 00:43:48 -080076extern int ip6_route_init(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -070077extern void ip6_route_cleanup(void);
78
Daniel Lezcano55786892008-03-04 13:47:47 -080079extern int ipv6_route_ioctl(struct net *net,
80 unsigned int cmd,
81 void __user *arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -070082
Thomas Graf86872cb2006-08-22 00:01:08 -070083extern int ip6_route_add(struct fib6_config *cfg);
Thomas Graf40e22e82006-08-22 00:00:45 -070084extern int ip6_ins_rt(struct rt6_info *);
Thomas Grafe0a1ad732006-08-22 00:00:21 -070085extern int ip6_del_rt(struct rt6_info *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070086
Daniel Lezcano606a2b42008-03-04 13:45:59 -080087extern struct rt6_info *rt6_lookup(struct net *net,
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +090088 const struct in6_addr *daddr,
89 const struct in6_addr *saddr,
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 int oif, int flags);
91
YOSHIFUJI Hideaki3b009442007-12-06 16:11:48 -080092extern struct dst_entry *icmp6_dst_alloc(struct net_device *dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -070093 struct neighbour *neigh,
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +090094 const struct in6_addr *addr);
Stephen Hemminger3d0f24a2008-07-22 14:35:50 -070095extern int icmp6_dst_gc(void);
YOSHIFUJI Hideaki3b009442007-12-06 16:11:48 -080096
Daniel Lezcano63152fc2008-03-03 23:31:11 -080097extern void fib6_force_start_gc(struct net *net);
Linus Torvalds1da177e2005-04-16 15:20:36 -070098
99extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
100 const struct in6_addr *addr,
101 int anycast);
102
YOSHIFUJI Hideaki6b75d092008-03-10 06:00:30 -0400103extern int ip6_dst_hoplimit(struct dst_entry *dst);
104
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105/*
106 * support functions for ND
107 *
108 */
109extern struct rt6_info * rt6_get_dflt_router(struct in6_addr *addr,
110 struct net_device *dev);
111extern struct rt6_info * rt6_add_dflt_router(struct in6_addr *gwaddr,
YOSHIFUJI Hideakiebacaaa2006-03-20 17:04:53 -0800112 struct net_device *dev,
113 unsigned int pref);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114
Daniel Lezcano7b4da532008-03-04 13:47:14 -0800115extern void rt6_purge_dflt_routers(struct net *net);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116
YOSHIFUJI Hideaki70ceb4f2006-03-20 17:06:24 -0800117extern int rt6_route_rcv(struct net_device *dev,
118 u8 *opt, int len,
119 struct in6_addr *gwaddr);
120
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121extern void rt6_redirect(struct in6_addr *dest,
YOSHIFUJI Hideaki5e032e32006-08-23 17:12:24 -0700122 struct in6_addr *src,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123 struct in6_addr *saddr,
124 struct neighbour *neigh,
125 u8 *lladdr,
126 int on_link);
127
128extern void rt6_pmtu_discovery(struct in6_addr *daddr,
129 struct in6_addr *saddr,
130 struct net_device *dev,
131 u32 pmtu);
132
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133struct netlink_callback;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000135struct rt6_rtnl_dump_arg {
Patrick McHardy1b43af52006-08-10 23:11:17 -0700136 struct sk_buff *skb;
137 struct netlink_callback *cb;
Brian Haley191cd582008-08-14 15:33:21 -0700138 struct net *net;
Patrick McHardy1b43af52006-08-10 23:11:17 -0700139};
140
141extern int rt6_dump_route(struct rt6_info *rt, void *p_arg);
Daniel Lezcanof3db4852008-03-03 23:27:06 -0800142extern void rt6_ifdown(struct net *net, struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143extern void rt6_mtu_change(struct net_device *dev, unsigned mtu);
144
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145
146/*
147 * Store a destination cache entry in a socket
148 */
Herbert Xu497c6152006-07-30 20:19:33 -0700149static inline void __ip6_dst_store(struct sock *sk, struct dst_entry *dst,
YOSHIFUJI Hideaki8e1ef0a2006-08-29 17:15:09 -0700150 struct in6_addr *daddr, struct in6_addr *saddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151{
152 struct ipv6_pinfo *np = inet6_sk(sk);
153 struct rt6_info *rt = (struct rt6_info *) dst;
154
Herbert Xuf83ef8c2006-06-30 13:37:03 -0700155 sk_setup_caps(sk, dst);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156 np->daddr_cache = daddr;
YOSHIFUJI Hideaki8e1ef0a2006-08-29 17:15:09 -0700157#ifdef CONFIG_IPV6_SUBTREES
158 np->saddr_cache = saddr;
159#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
Herbert Xu497c6152006-07-30 20:19:33 -0700161}
162
163static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst,
YOSHIFUJI Hideaki8e1ef0a2006-08-29 17:15:09 -0700164 struct in6_addr *daddr, struct in6_addr *saddr)
Herbert Xu497c6152006-07-30 20:19:33 -0700165{
Eric Dumazetb6c67122010-04-08 23:03:29 +0000166 spin_lock(&sk->sk_dst_lock);
YOSHIFUJI Hideaki8e1ef0a2006-08-29 17:15:09 -0700167 __ip6_dst_store(sk, dst, daddr, saddr);
Eric Dumazetb6c67122010-04-08 23:03:29 +0000168 spin_unlock(&sk->sk_dst_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169}
170
171static inline int ipv6_unicast_destination(struct sk_buff *skb)
172{
Eric Dumazetadf30902009-06-02 05:19:30 +0000173 struct rt6_info *rt = (struct rt6_info *) skb_dst(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174
175 return rt->rt6i_flags & RTF_LOCAL;
176}
177
David Stevensad0081e2010-12-17 11:42:42 +0000178int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *));
179
180static inline int ip6_skb_dst_mtu(struct sk_buff *skb)
181{
182 struct ipv6_pinfo *np = skb->sk ? inet6_sk(skb->sk) : NULL;
183
184 return (np && np->pmtudisc == IPV6_PMTUDISC_PROBE) ?
185 skb_dst(skb)->dev->mtu : dst_mtu(skb_dst(skb));
186}
187
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188#endif
189#endif