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[IPV6]: Use bitfields for hop_limit and mcast_hops.
[mirror_ubuntu-bionic-kernel.git] / include / net / ip6_route.h
CommitLineData
1da177e4
LT		 1#ifndef _NET_IP6_ROUTE_H
2#define _NET_IP6_ROUTE_H
3
1da177e4
LT		 4#define IP6_RT_PRIO_USER 1024
5#define IP6_RT_PRIO_ADDRCONF 256
6#define IP6_RT_PRIO_KERN 512
1da177e4 7
70ceb4f5
YH		 8struct 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
e69a4adc 21 __be32 lifetime;
70ceb4f5
YH		 22 __u8 prefix[0]; /* 0,8 or 16 */
23};
24
1da177e4
LT		 25#ifdef __KERNEL__
26
27#include <net/flow.h>
28#include <net/ip6_fib.h>
29#include <net/sock.h>
1da177e4
LT		 30#include <linux/ip.h>
31#include <linux/ipv6.h>
32
77d16f45
YH		 33#define RT6_LOOKUP_F_IFACE 0x1
34#define RT6_LOOKUP_F_REACHABLE 0x2
35#define RT6_LOOKUP_F_HAS_SADDR 0x4
36
bdb3289f 37extern struct rt6_info *ip6_null_entry;
1da177e4 38
101367c2 39#ifdef CONFIG_IPV6_MULTIPLE_TABLES
bdb3289f
DL		 40extern struct rt6_info *ip6_prohibit_entry;
41extern struct rt6_info *ip6_blk_hole_entry;
101367c2
TG		 42#endif
43
1da177e4
LT		 44extern void ip6_route_input(struct sk_buff *skb);
45
4591db4f
DL		 46extern struct dst_entry * ip6_route_output(struct net *net,
47 struct sock *sk,
1da177e4
LT		 48 struct flowi *fl);
49
433d49c3 50extern int ip6_route_init(void);
1da177e4
LT		 51extern void ip6_route_cleanup(void);
52
5578689a
DL		 53extern int ipv6_route_ioctl(struct net *net,
54 unsigned int cmd,
55 void __user *arg);
1da177e4 56
86872cb5 57extern int ip6_route_add(struct fib6_config *cfg);
40e22e8f 58extern int ip6_ins_rt(struct rt6_info *);
e0a1ad73 59extern int ip6_del_rt(struct rt6_info *);
1da177e4
LT		 60
61extern int ip6_rt_addr_add(struct in6_addr *addr,
62 struct net_device *dev,
63 int anycast);
64
65extern int ip6_rt_addr_del(struct in6_addr *addr,
66 struct net_device *dev);
67
68extern void rt6_sndmsg(int type, struct in6_addr *dst,
69 struct in6_addr *src,
70 struct in6_addr *gw,
71 struct net_device *dev,
72 int dstlen, int srclen,
73 int metric, __u32 flags);
74
606a2b48
DL		 75extern struct rt6_info *rt6_lookup(struct net *net,
76 struct in6_addr *daddr,
1da177e4
LT		 77 struct in6_addr *saddr,
78 int oif, int flags);
79
3b00944c 80extern struct dst_entry *icmp6_dst_alloc(struct net_device *dev,
1da177e4 81 struct neighbour *neigh,
3b00944c
YH		 82 struct in6_addr *addr);
83extern int icmp6_dst_gc(int *more);
84
63152fc0 85extern void fib6_force_start_gc(struct net *net);
1da177e4
LT		 86
87extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
88 const struct in6_addr *addr,
89 int anycast);
90
6b75d090
YH		 91extern int ip6_dst_hoplimit(struct dst_entry *dst);
92
1da177e4
LT		 93/*
94 * support functions for ND
95 *
96 */
97extern struct rt6_info * rt6_get_dflt_router(struct in6_addr *addr,
98 struct net_device *dev);
99extern struct rt6_info * rt6_add_dflt_router(struct in6_addr *gwaddr,
ebacaaa0
YH		 100 struct net_device *dev,
101 unsigned int pref);
1da177e4 102
7b4da532 103extern void rt6_purge_dflt_routers(struct net *net);
1da177e4 104
70ceb4f5
YH		 105extern int rt6_route_rcv(struct net_device *dev,
106 u8 *opt, int len,
107 struct in6_addr *gwaddr);
108
1da177e4 109extern void rt6_redirect(struct in6_addr *dest,
5e032e32 110 struct in6_addr *src,
1da177e4
LT		 111 struct in6_addr *saddr,
112 struct neighbour *neigh,
113 u8 *lladdr,
114 int on_link);
115
116extern void rt6_pmtu_discovery(struct in6_addr *daddr,
117 struct in6_addr *saddr,
118 struct net_device *dev,
119 u32 pmtu);
120
1da177e4 121struct netlink_callback;
1da177e4 122
1b43af54
PM		 123struct rt6_rtnl_dump_arg
124{
125 struct sk_buff *skb;
126 struct netlink_callback *cb;
127};
128
129extern int rt6_dump_route(struct rt6_info *rt, void *p_arg);
f3db4851 130extern void rt6_ifdown(struct net *net, struct net_device *dev);
1da177e4
LT		 131extern void rt6_mtu_change(struct net_device *dev, unsigned mtu);
132
133extern rwlock_t rt6_lock;
134
135/*
136 * Store a destination cache entry in a socket
137 */
497c615a 138static inline void __ip6_dst_store(struct sock *sk, struct dst_entry *dst,
8e1ef0a9 139 struct in6_addr *daddr, struct in6_addr *saddr)
1da177e4
LT		 140{
141 struct ipv6_pinfo *np = inet6_sk(sk);
142 struct rt6_info *rt = (struct rt6_info *) dst;
143
f83ef8c0 144 sk_setup_caps(sk, dst);
1da177e4 145 np->daddr_cache = daddr;
8e1ef0a9
YH		 146#ifdef CONFIG_IPV6_SUBTREES
147 np->saddr_cache = saddr;
148#endif
1da177e4 149 np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
497c615a
HX		 150}
151
152static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst,
8e1ef0a9 153 struct in6_addr *daddr, struct in6_addr *saddr)
497c615a
HX		 154{
155 write_lock(&sk->sk_dst_lock);
8e1ef0a9 156 __ip6_dst_store(sk, dst, daddr, saddr);
1da177e4
LT		 157 write_unlock(&sk->sk_dst_lock);
158}
159
160static inline int ipv6_unicast_destination(struct sk_buff *skb)
161{
162 struct rt6_info *rt = (struct rt6_info *) skb->dst;
163
164 return rt->rt6i_flags & RTF_LOCAL;
165}
166
167#endif
168#endif
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