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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 -070054
Joe Perches5c3a0fd2013-09-21 10:22:42 -070055void ip6_route_input(struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -070056
Joe Perches5c3a0fd2013-09-21 10:22:42 -070057struct dst_entry *ip6_route_output(struct net *net, const struct sock *sk,
58 struct flowi6 *fl6);
59struct dst_entry *ip6_route_lookup(struct net *net, struct flowi6 *fl6,
60 int flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -070061
Joe Perches5c3a0fd2013-09-21 10:22:42 -070062int ip6_route_init(void);
63void ip6_route_cleanup(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -070064
Joe Perches5c3a0fd2013-09-21 10:22:42 -070065int ipv6_route_ioctl(struct net *net, unsigned int cmd, void __user *arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -070066
Joe Perches5c3a0fd2013-09-21 10:22:42 -070067int ip6_route_add(struct fib6_config *cfg);
68int ip6_ins_rt(struct rt6_info *);
69int ip6_del_rt(struct rt6_info *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070070
Joe Perches5c3a0fd2013-09-21 10:22:42 -070071int ip6_route_get_saddr(struct net *net, struct rt6_info *rt,
72 const struct in6_addr *daddr, unsigned int prefs,
73 struct in6_addr *saddr);
Daniel Walterc3968a82011-04-13 21:10:57 +000074
Joe Perches5c3a0fd2013-09-21 10:22:42 -070075struct rt6_info *rt6_lookup(struct net *net, const struct in6_addr *daddr,
76 const struct in6_addr *saddr, int oif, int flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -070077
Joe Perches5c3a0fd2013-09-21 10:22:42 -070078struct dst_entry *icmp6_dst_alloc(struct net_device *dev, struct flowi6 *fl6);
79int icmp6_dst_gc(void);
YOSHIFUJI Hideaki3b009442007-12-06 16:11:48 -080080
Joe Perches5c3a0fd2013-09-21 10:22:42 -070081void fib6_force_start_gc(struct net *net);
Linus Torvalds1da177e2005-04-16 15:20:36 -070082
Joe Perches5c3a0fd2013-09-21 10:22:42 -070083struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
84 const struct in6_addr *addr, bool anycast);
Linus Torvalds1da177e2005-04-16 15:20:36 -070085
86/*
87 * support functions for ND
88 *
89 */
Joe Perches5c3a0fd2013-09-21 10:22:42 -070090struct rt6_info *rt6_get_dflt_router(const struct in6_addr *addr,
91 struct net_device *dev);
92struct rt6_info *rt6_add_dflt_router(const struct in6_addr *gwaddr,
93 struct net_device *dev, unsigned int pref);
Linus Torvalds1da177e2005-04-16 15:20:36 -070094
Joe Perches5c3a0fd2013-09-21 10:22:42 -070095void rt6_purge_dflt_routers(struct net *net);
Linus Torvalds1da177e2005-04-16 15:20:36 -070096
Joe Perches5c3a0fd2013-09-21 10:22:42 -070097int rt6_route_rcv(struct net_device *dev, u8 *opt, int len,
98 const struct in6_addr *gwaddr);
YOSHIFUJI Hideaki70ceb4f2006-03-20 17:06:24 -080099
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700100void ip6_update_pmtu(struct sk_buff *skb, struct net *net, __be32 mtu, int oif,
101 u32 mark);
102void ip6_sk_update_pmtu(struct sk_buff *skb, struct sock *sk, __be32 mtu);
103void ip6_redirect(struct sk_buff *skb, struct net *net, int oif, u32 mark);
104void ip6_redirect_no_header(struct sk_buff *skb, struct net *net, int oif,
105 u32 mark);
106void ip6_sk_redirect(struct sk_buff *skb, struct sock *sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108struct netlink_callback;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000110struct rt6_rtnl_dump_arg {
Patrick McHardy1b43af52006-08-10 23:11:17 -0700111 struct sk_buff *skb;
112 struct netlink_callback *cb;
Brian Haley191cd582008-08-14 15:33:21 -0700113 struct net *net;
Patrick McHardy1b43af52006-08-10 23:11:17 -0700114};
115
Joe Perches5c3a0fd2013-09-21 10:22:42 -0700116int rt6_dump_route(struct rt6_info *rt, void *p_arg);
117void rt6_ifdown(struct net *net, struct net_device *dev);
118void rt6_mtu_change(struct net_device *dev, unsigned int mtu);
119void rt6_remove_prefsrc(struct inet6_ifaddr *ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121
122/*
123 * Store a destination cache entry in a socket
124 */
Herbert Xu497c6152006-07-30 20:19:33 -0700125static inline void __ip6_dst_store(struct sock *sk, struct dst_entry *dst,
Eric Dumazetd3818c92012-07-17 21:38:04 +0000126 const struct in6_addr *daddr,
127 const struct in6_addr *saddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128{
129 struct ipv6_pinfo *np = inet6_sk(sk);
130 struct rt6_info *rt = (struct rt6_info *) dst;
131
Herbert Xuf83ef8c2006-06-30 13:37:03 -0700132 sk_setup_caps(sk, dst);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133 np->daddr_cache = daddr;
YOSHIFUJI Hideaki8e1ef0a2006-08-29 17:15:09 -0700134#ifdef CONFIG_IPV6_SUBTREES
135 np->saddr_cache = saddr;
136#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
Herbert Xu497c6152006-07-30 20:19:33 -0700138}
139
140static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst,
YOSHIFUJI Hideaki8e1ef0a2006-08-29 17:15:09 -0700141 struct in6_addr *daddr, struct in6_addr *saddr)
Herbert Xu497c6152006-07-30 20:19:33 -0700142{
Eric Dumazetb6c67122010-04-08 23:03:29 +0000143 spin_lock(&sk->sk_dst_lock);
YOSHIFUJI Hideaki8e1ef0a2006-08-29 17:15:09 -0700144 __ip6_dst_store(sk, dst, daddr, saddr);
Eric Dumazetb6c67122010-04-08 23:03:29 +0000145 spin_unlock(&sk->sk_dst_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146}
147
Eric Dumazeta50feda2012-05-18 18:57:34 +0000148static inline bool ipv6_unicast_destination(const struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149{
Eric Dumazetadf30902009-06-02 05:19:30 +0000150 struct rt6_info *rt = (struct rt6_info *) skb_dst(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151
152 return rt->rt6i_flags & RTF_LOCAL;
153}
154
FX Le Bail509aba32014-01-07 14:57:27 +0100155static inline bool ipv6_anycast_destination(const struct sk_buff *skb)
156{
157 struct rt6_info *rt = (struct rt6_info *) skb_dst(skb);
158
159 return rt->rt6i_flags & RTF_ANYCAST;
160}
161
David Stevensad0081e2010-12-17 11:42:42 +0000162int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *));
163
164static inline int ip6_skb_dst_mtu(struct sk_buff *skb)
165{
166 struct ipv6_pinfo *np = skb->sk ? inet6_sk(skb->sk) : NULL;
167
Hannes Frederic Sowa93b36cf2013-12-15 03:41:14 +0100168 return (np && np->pmtudisc >= IPV6_PMTUDISC_PROBE) ?
David Stevensad0081e2010-12-17 11:42:42 +0000169 skb_dst(skb)->dev->mtu : dst_mtu(skb_dst(skb));
170}
171
Hannes Frederic Sowa93b36cf2013-12-15 03:41:14 +0100172static inline bool ip6_sk_accept_pmtu(const struct sock *sk)
173{
174 return inet6_sk(sk)->pmtudisc != IPV6_PMTUDISC_INTERFACE;
175}
176
Julian Anastasov550bab42013-10-20 15:43:04 +0300177static inline struct in6_addr *rt6_nexthop(struct rt6_info *rt)
YOSHIFUJI Hideaki / 吉藤英明9bb5a142013-01-17 12:53:48 +0000178{
Julian Anastasov550bab42013-10-20 15:43:04 +0300179 return &rt->rt6i_gateway;
YOSHIFUJI Hideaki / 吉藤英明9bb5a142013-01-17 12:53:48 +0000180}
181
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182#endif