xref: /openbmc/linux/include/net/ip6_route.h (revision 5e032e32ecc2e6cb0385dc115ca9bfe5e19a9539)
1 #ifndef _NET_IP6_ROUTE_H
2 #define _NET_IP6_ROUTE_H
3 
4 #define IP6_RT_PRIO_FW		16
5 #define IP6_RT_PRIO_USER	1024
6 #define IP6_RT_PRIO_ADDRCONF	256
7 #define IP6_RT_PRIO_KERN	512
8 #define IP6_RT_FLOW_MASK	0x00ff
9 
10 struct route_info {
11 	__u8			type;
12 	__u8			length;
13 	__u8			prefix_len;
14 #if defined(__BIG_ENDIAN_BITFIELD)
15 	__u8			reserved_h:3,
16 				route_pref:2,
17 				reserved_l:3;
18 #elif defined(__LITTLE_ENDIAN_BITFIELD)
19 	__u8			reserved_l:3,
20 				route_pref:2,
21 				reserved_h:3;
22 #endif
23 	__u32			lifetime;
24 	__u8			prefix[0];	/* 0,8 or 16 */
25 };
26 
27 #ifdef __KERNEL__
28 
29 #include <net/flow.h>
30 #include <net/ip6_fib.h>
31 #include <net/sock.h>
32 #include <linux/ip.h>
33 #include <linux/ipv6.h>
34 
35 struct pol_chain {
36 	int			type;
37 	int			priority;
38 	struct fib6_node	*rules;
39 	struct pol_chain	*next;
40 };
41 
42 extern struct rt6_info	ip6_null_entry;
43 
44 #ifdef CONFIG_IPV6_MULTIPLE_TABLES
45 extern struct rt6_info	ip6_prohibit_entry;
46 extern struct rt6_info	ip6_blk_hole_entry;
47 #endif
48 
49 extern int ip6_rt_gc_interval;
50 
51 extern void			ip6_route_input(struct sk_buff *skb);
52 
53 extern struct dst_entry *	ip6_route_output(struct sock *sk,
54 						 struct flowi *fl);
55 
56 extern int			ip6_route_me_harder(struct sk_buff *skb);
57 
58 extern void			ip6_route_init(void);
59 extern void			ip6_route_cleanup(void);
60 
61 extern int			ipv6_route_ioctl(unsigned int cmd, void __user *arg);
62 
63 extern int			ip6_route_add(struct fib6_config *cfg);
64 extern int			ip6_ins_rt(struct rt6_info *);
65 extern int			ip6_del_rt(struct rt6_info *);
66 
67 extern int			ip6_rt_addr_add(struct in6_addr *addr,
68 						struct net_device *dev,
69 						int anycast);
70 
71 extern int			ip6_rt_addr_del(struct in6_addr *addr,
72 						struct net_device *dev);
73 
74 extern void			rt6_sndmsg(int type, struct in6_addr *dst,
75 					   struct in6_addr *src,
76 					   struct in6_addr *gw,
77 					   struct net_device *dev,
78 					   int dstlen, int srclen,
79 					   int metric, __u32 flags);
80 
81 extern struct rt6_info		*rt6_lookup(struct in6_addr *daddr,
82 					    struct in6_addr *saddr,
83 					    int oif, int flags);
84 
85 extern struct dst_entry *ndisc_dst_alloc(struct net_device *dev,
86 					 struct neighbour *neigh,
87 					 struct in6_addr *addr,
88 					 int (*output)(struct sk_buff *));
89 extern int ndisc_dst_gc(int *more);
90 extern void fib6_force_start_gc(void);
91 
92 extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
93 					   const struct in6_addr *addr,
94 					   int anycast);
95 
96 /*
97  *	support functions for ND
98  *
99  */
100 extern struct rt6_info *	rt6_get_dflt_router(struct in6_addr *addr,
101 						    struct net_device *dev);
102 extern struct rt6_info *	rt6_add_dflt_router(struct in6_addr *gwaddr,
103 						    struct net_device *dev,
104 						    unsigned int pref);
105 
106 extern void			rt6_purge_dflt_routers(void);
107 
108 extern int			rt6_route_rcv(struct net_device *dev,
109 					      u8 *opt, int len,
110 					      struct in6_addr *gwaddr);
111 
112 extern void			rt6_redirect(struct in6_addr *dest,
113 					     struct in6_addr *src,
114 					     struct in6_addr *saddr,
115 					     struct neighbour *neigh,
116 					     u8 *lladdr,
117 					     int on_link);
118 
119 extern void			rt6_pmtu_discovery(struct in6_addr *daddr,
120 						   struct in6_addr *saddr,
121 						   struct net_device *dev,
122 						   u32 pmtu);
123 
124 struct nlmsghdr;
125 struct netlink_callback;
126 extern int inet6_dump_fib(struct sk_buff *skb, struct netlink_callback *cb);
127 extern int inet6_rtm_newroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg);
128 extern int inet6_rtm_delroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg);
129 extern int inet6_rtm_getroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg);
130 
131 struct rt6_rtnl_dump_arg
132 {
133 	struct sk_buff *skb;
134 	struct netlink_callback *cb;
135 };
136 
137 extern int rt6_dump_route(struct rt6_info *rt, void *p_arg);
138 extern void rt6_ifdown(struct net_device *dev);
139 extern void rt6_mtu_change(struct net_device *dev, unsigned mtu);
140 
141 extern rwlock_t rt6_lock;
142 
143 /*
144  *	Store a destination cache entry in a socket
145  */
146 static inline void __ip6_dst_store(struct sock *sk, struct dst_entry *dst,
147 				   struct in6_addr *daddr)
148 {
149 	struct ipv6_pinfo *np = inet6_sk(sk);
150 	struct rt6_info *rt = (struct rt6_info *) dst;
151 
152 	sk_setup_caps(sk, dst);
153 	np->daddr_cache = daddr;
154 	np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
155 }
156 
157 static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst,
158 				 struct in6_addr *daddr)
159 {
160 	write_lock(&sk->sk_dst_lock);
161 	__ip6_dst_store(sk, dst, daddr);
162 	write_unlock(&sk->sk_dst_lock);
163 }
164 
165 static inline int ipv6_unicast_destination(struct sk_buff *skb)
166 {
167 	struct rt6_info *rt = (struct rt6_info *) skb->dst;
168 
169 	return rt->rt6i_flags & RTF_LOCAL;
170 }
171 
172 #endif
173 #endif
174