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linux
1#ifndef _NET_IP6_ROUTE_H
2#define _NET_IP6_ROUTE_H
3
4#define IP6_RT_PRIO_USER 1024
5#define IP6_RT_PRIO_ADDRCONF 256
6
7struct 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
20 __be32 lifetime;
21 __u8 prefix[0]; /* 0,8 or 16 */
22};
23
24#include <net/flow.h>
25#include <net/ip6_fib.h>
26#include <net/sock.h>
27#include <linux/ip.h>
28#include <linux/ipv6.h>
29
30#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
36
37/*
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}
55
56extern void rt6_bind_peer(struct rt6_info *rt, int create);
57
58static inline struct inet_peer *__rt6_get_peer(struct rt6_info *rt, int create)
59{
60 if (rt6_has_peer(rt))
61 return rt6_peer_ptr(rt);
62
63 rt6_bind_peer(rt, create);
64 return (rt6_has_peer(rt) ? rt6_peer_ptr(rt) : NULL);
65}
66
67static inline struct inet_peer *rt6_get_peer(struct rt6_info *rt)
68{
69 return __rt6_get_peer(rt, 0);
70}
71
72static inline struct inet_peer *rt6_get_peer_create(struct rt6_info *rt)
73{
74 return __rt6_get_peer(rt, 1);
75}
76
77extern void ip6_route_input(struct sk_buff *skb);
78
79extern struct dst_entry * ip6_route_output(struct net *net,
80 const struct sock *sk,
81 struct flowi6 *fl6);
82extern struct dst_entry * ip6_route_lookup(struct net *net,
83 struct flowi6 *fl6, int flags);
84
85extern int ip6_route_init(void);
86extern void ip6_route_cleanup(void);
87
88extern int ipv6_route_ioctl(struct net *net,
89 unsigned int cmd,
90 void __user *arg);
91
92extern int ip6_route_add(struct fib6_config *cfg);
93extern int ip6_ins_rt(struct rt6_info *);
94extern int ip6_del_rt(struct rt6_info *);
95
96extern int ip6_route_get_saddr(struct net *net,
97 struct rt6_info *rt,
98 const struct in6_addr *daddr,
99 unsigned int prefs,
100 struct in6_addr *saddr);
101
102extern struct rt6_info *rt6_lookup(struct net *net,
103 const struct in6_addr *daddr,
104 const struct in6_addr *saddr,
105 int oif, int flags);
106
107extern struct dst_entry *icmp6_dst_alloc(struct net_device *dev,
108 struct neighbour *neigh,
109 struct flowi6 *fl6);
110extern int icmp6_dst_gc(void);
111
112extern void fib6_force_start_gc(struct net *net);
113
114extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
115 const struct in6_addr *addr,
116 bool anycast);
117
118extern int ip6_dst_hoplimit(struct dst_entry *dst);
119
120/*
121 * support functions for ND
122 *
123 */
124extern struct rt6_info * rt6_get_dflt_router(const struct in6_addr *addr,
125 struct net_device *dev);
126extern struct rt6_info * rt6_add_dflt_router(const struct in6_addr *gwaddr,
127 struct net_device *dev,
128 unsigned int pref);
129
130extern void rt6_purge_dflt_routers(struct net *net);
131
132extern int rt6_route_rcv(struct net_device *dev,
133 u8 *opt, int len,
134 const struct in6_addr *gwaddr);
135
136extern void ip6_update_pmtu(struct sk_buff *skb, struct net *net, __be32 mtu,
137 int oif, u32 mark);
138extern void ip6_sk_update_pmtu(struct sk_buff *skb, struct sock *sk,
139 __be32 mtu);
140extern void ip6_redirect(struct sk_buff *skb, struct net *net, int oif, u32 mark);
141extern void ip6_sk_redirect(struct sk_buff *skb, struct sock *sk);
142
143struct netlink_callback;
144
145struct rt6_rtnl_dump_arg {
146 struct sk_buff *skb;
147 struct netlink_callback *cb;
148 struct net *net;
149};
150
151extern int rt6_dump_route(struct rt6_info *rt, void *p_arg);
152extern void rt6_ifdown(struct net *net, struct net_device *dev);
153extern void rt6_mtu_change(struct net_device *dev, unsigned int mtu);
154extern void rt6_remove_prefsrc(struct inet6_ifaddr *ifp);
155
156
157/*
158 * Store a destination cache entry in a socket
159 */
160static inline void __ip6_dst_store(struct sock *sk, struct dst_entry *dst,
161 const struct in6_addr *daddr,
162 const struct in6_addr *saddr)
163{
164 struct ipv6_pinfo *np = inet6_sk(sk);
165 struct rt6_info *rt = (struct rt6_info *) dst;
166
167 sk_setup_caps(sk, dst);
168 np->daddr_cache = daddr;
169#ifdef CONFIG_IPV6_SUBTREES
170 np->saddr_cache = saddr;
171#endif
172 np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
173}
174
175static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst,
176 struct in6_addr *daddr, struct in6_addr *saddr)
177{
178 spin_lock(&sk->sk_dst_lock);
179 __ip6_dst_store(sk, dst, daddr, saddr);
180 spin_unlock(&sk->sk_dst_lock);
181}
182
183static inline bool ipv6_unicast_destination(const struct sk_buff *skb)
184{
185 struct rt6_info *rt = (struct rt6_info *) skb_dst(skb);
186
187 return rt->rt6i_flags & RTF_LOCAL;
188}
189
190int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *));
191
192static inline int ip6_skb_dst_mtu(struct sk_buff *skb)
193{
194 struct ipv6_pinfo *np = skb->sk ? inet6_sk(skb->sk) : NULL;
195
196 return (np && np->pmtudisc == IPV6_PMTUDISC_PROBE) ?
197 skb_dst(skb)->dev->mtu : dst_mtu(skb_dst(skb));
198}
199
200#endif