tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
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#ifdef __KERNEL__
25
26#include <net/flow.h>
27#include <net/ip6_fib.h>
28#include <net/sock.h>
29#include <linux/ip.h>
30#include <linux/ipv6.h>
31
32#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
38
39/*
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}
57
58extern void rt6_bind_peer(struct rt6_info *rt,
59 int create);
60
61static 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
70extern void ip6_route_input(struct sk_buff *skb);
71
72extern struct dst_entry * ip6_route_output(struct net *net,
73 struct sock *sk,
74 struct flowi6 *fl6);
75
76extern int ip6_route_init(void);
77extern void ip6_route_cleanup(void);
78
79extern int ipv6_route_ioctl(struct net *net,
80 unsigned int cmd,
81 void __user *arg);
82
83extern int ip6_route_add(struct fib6_config *cfg);
84extern int ip6_ins_rt(struct rt6_info *);
85extern int ip6_del_rt(struct rt6_info *);
86
87extern struct rt6_info *rt6_lookup(struct net *net,
88 const struct in6_addr *daddr,
89 const struct in6_addr *saddr,
90 int oif, int flags);
91
92extern struct dst_entry *icmp6_dst_alloc(struct net_device *dev,
93 struct neighbour *neigh,
94 const struct in6_addr *addr);
95extern int icmp6_dst_gc(void);
96
97extern void fib6_force_start_gc(struct net *net);
98
99extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
100 const struct in6_addr *addr,
101 int anycast);
102
103extern int ip6_dst_hoplimit(struct dst_entry *dst);
104
105/*
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,
112 struct net_device *dev,
113 unsigned int pref);
114
115extern void rt6_purge_dflt_routers(struct net *net);
116
117extern int rt6_route_rcv(struct net_device *dev,
118 u8 *opt, int len,
119 struct in6_addr *gwaddr);
120
121extern void rt6_redirect(struct in6_addr *dest,
122 struct in6_addr *src,
123 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
133struct netlink_callback;
134
135struct rt6_rtnl_dump_arg {
136 struct sk_buff *skb;
137 struct netlink_callback *cb;
138 struct net *net;
139};
140
141extern int rt6_dump_route(struct rt6_info *rt, void *p_arg);
142extern void rt6_ifdown(struct net *net, struct net_device *dev);
143extern void rt6_mtu_change(struct net_device *dev, unsigned mtu);
144
145
146/*
147 * Store a destination cache entry in a socket
148 */
149static inline void __ip6_dst_store(struct sock *sk, struct dst_entry *dst,
150 struct in6_addr *daddr, struct in6_addr *saddr)
151{
152 struct ipv6_pinfo *np = inet6_sk(sk);
153 struct rt6_info *rt = (struct rt6_info *) dst;
154
155 sk_setup_caps(sk, dst);
156 np->daddr_cache = daddr;
157#ifdef CONFIG_IPV6_SUBTREES
158 np->saddr_cache = saddr;
159#endif
160 np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
161}
162
163static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst,
164 struct in6_addr *daddr, struct in6_addr *saddr)
165{
166 spin_lock(&sk->sk_dst_lock);
167 __ip6_dst_store(sk, dst, daddr, saddr);
168 spin_unlock(&sk->sk_dst_lock);
169}
170
171static inline int ipv6_unicast_destination(struct sk_buff *skb)
172{
173 struct rt6_info *rt = (struct rt6_info *) skb_dst(skb);
174
175 return rt->rt6i_flags & RTF_LOCAL;
176}
177
178int 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
188#endif
189#endif