[mirror_ubuntu-bionic-kernel.git] / include / net / ip6_route.h

#ifndef _NET_IP6_ROUTE_H
#define _NET_IP6_ROUTE_H

#define IP6_RT_PRIO_FW		16
#define IP6_RT_PRIO_USER	1024
#define IP6_RT_PRIO_ADDRCONF	256
#define IP6_RT_PRIO_KERN	512
#define IP6_RT_FLOW_MASK	0x00ff

struct route_info {
	__u8			type;
	__u8			length;
	__u8			prefix_len;
#if defined(__BIG_ENDIAN_BITFIELD)
	__u8			reserved_h:3,
				route_pref:2,
				reserved_l:3;
#elif defined(__LITTLE_ENDIAN_BITFIELD)
	__u8			reserved_l:3,
				route_pref:2,
				reserved_h:3;
#endif
	__u32			lifetime;
	__u8			prefix[0];	/* 0,8 or 16 */
};

#ifdef __KERNEL__

#include <net/flow.h>
#include <net/ip6_fib.h>
#include <net/sock.h>
#include <linux/ip.h>
#include <linux/ipv6.h>

#define RT6_LOOKUP_F_IFACE	0x1
#define RT6_LOOKUP_F_REACHABLE	0x2
#define RT6_LOOKUP_F_HAS_SADDR	0x4

extern struct rt6_info	ip6_null_entry;

#ifdef CONFIG_IPV6_MULTIPLE_TABLES
extern struct rt6_info	ip6_prohibit_entry;
extern struct rt6_info	ip6_blk_hole_entry;
#endif

extern int ip6_rt_gc_interval;

extern void			ip6_route_input(struct sk_buff *skb);

extern struct dst_entry *	ip6_route_output(struct sock *sk,
						 struct flowi *fl);

extern void			ip6_route_init(void);
extern void			ip6_route_cleanup(void);

extern int			ipv6_route_ioctl(unsigned int cmd, void __user *arg);

extern int			ip6_route_add(struct fib6_config *cfg);
extern int			ip6_ins_rt(struct rt6_info *);
extern int			ip6_del_rt(struct rt6_info *);

extern int			ip6_rt_addr_add(struct in6_addr *addr,
						struct net_device *dev,
						int anycast);

extern int			ip6_rt_addr_del(struct in6_addr *addr,
						struct net_device *dev);

extern void			rt6_sndmsg(int type, struct in6_addr *dst,
					   struct in6_addr *src,
					   struct in6_addr *gw,
					   struct net_device *dev, 
					   int dstlen, int srclen,
					   int metric, __u32 flags);

extern struct rt6_info		*rt6_lookup(struct in6_addr *daddr,
					    struct in6_addr *saddr,
					    int oif, int flags);

extern struct dst_entry *ndisc_dst_alloc(struct net_device *dev,
					 struct neighbour *neigh,
					 struct in6_addr *addr,
					 int (*output)(struct sk_buff *));
extern int ndisc_dst_gc(int *more);
extern void fib6_force_start_gc(void);

extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
					   const struct in6_addr *addr,
					   int anycast);

/*
 *	support functions for ND
 *
 */
extern struct rt6_info *	rt6_get_dflt_router(struct in6_addr *addr,
						    struct net_device *dev);
extern struct rt6_info *	rt6_add_dflt_router(struct in6_addr *gwaddr,
						    struct net_device *dev,
						    unsigned int pref);

extern void			rt6_purge_dflt_routers(void);

extern int			rt6_route_rcv(struct net_device *dev,
					      u8 *opt, int len,
					      struct in6_addr *gwaddr);

extern void			rt6_redirect(struct in6_addr *dest,
					     struct in6_addr *src,
					     struct in6_addr *saddr,
					     struct neighbour *neigh,
					     u8 *lladdr,
					     int on_link);

extern void			rt6_pmtu_discovery(struct in6_addr *daddr,
						   struct in6_addr *saddr,
						   struct net_device *dev,
						   u32 pmtu);

struct nlmsghdr;
struct netlink_callback;
extern int inet6_dump_fib(struct sk_buff *skb, struct netlink_callback *cb);
extern int inet6_rtm_newroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg);
extern int inet6_rtm_delroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg);
extern int inet6_rtm_getroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg);

struct rt6_rtnl_dump_arg
{
	struct sk_buff *skb;
	struct netlink_callback *cb;
};

extern int rt6_dump_route(struct rt6_info *rt, void *p_arg);
extern void rt6_ifdown(struct net_device *dev);
extern void rt6_mtu_change(struct net_device *dev, unsigned mtu);

extern rwlock_t rt6_lock;

/*
 *	Store a destination cache entry in a socket
 */
static inline void __ip6_dst_store(struct sock *sk, struct dst_entry *dst,
				   struct in6_addr *daddr, struct in6_addr *saddr)
{
	struct ipv6_pinfo *np = inet6_sk(sk);
	struct rt6_info *rt = (struct rt6_info *) dst;

	sk_setup_caps(sk, dst);
	np->daddr_cache = daddr;
#ifdef CONFIG_IPV6_SUBTREES
	np->saddr_cache = saddr;
#endif
	np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
}

static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst,
				 struct in6_addr *daddr, struct in6_addr *saddr)
{
	write_lock(&sk->sk_dst_lock);
	__ip6_dst_store(sk, dst, daddr, saddr);
	write_unlock(&sk->sk_dst_lock);
}

static inline int ipv6_unicast_destination(struct sk_buff *skb)
{
	struct rt6_info *rt = (struct rt6_info *) skb->dst;

	return rt->rt6i_flags & RTF_LOCAL;
}

#endif
#endif
Commit	Line	Data
1da177e4 LT	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
70ceb4f5 YH	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
1da177e4 LT	27	#ifdef __KERNEL__
	28
	29	#include <net/flow.h>
	30	#include <net/ip6_fib.h>
	31	#include <net/sock.h>
1da177e4 LT	32	#include <linux/ip.h>
	33	#include <linux/ipv6.h>
	34
77d16f45 YH	35	#define RT6_LOOKUP_F_IFACE 0x1
	36	#define RT6_LOOKUP_F_REACHABLE 0x2
	37	#define RT6_LOOKUP_F_HAS_SADDR 0x4
	38
1da177e4 LT	39	extern struct rt6_info ip6_null_entry;
1da177e4 LT	40
101367c2 TG	41	#ifdef CONFIG_IPV6_MULTIPLE_TABLES
	42	extern struct rt6_info ip6_prohibit_entry;
	43	extern struct rt6_info ip6_blk_hole_entry;
	44	#endif
	45
1da177e4 LT	46	extern int ip6_rt_gc_interval;
	47
	48	extern void ip6_route_input(struct sk_buff *skb);
	49
	50	extern struct dst_entry * ip6_route_output(struct sock *sk,
	51	struct flowi *fl);
	52
1da177e4 LT	53	extern void ip6_route_init(void);
	54	extern void ip6_route_cleanup(void);
	55
	56	extern int ipv6_route_ioctl(unsigned int cmd, void __user *arg);
	57
86872cb5	58	extern int ip6_route_add(struct fib6_config *cfg);
40e22e8f	59	extern int ip6_ins_rt(struct rt6_info *);
e0a1ad73	60	extern int ip6_del_rt(struct rt6_info *);
1da177e4 LT	61
	62	extern int ip6_rt_addr_add(struct in6_addr *addr,
	63	struct net_device *dev,
	64	int anycast);
	65
	66	extern int ip6_rt_addr_del(struct in6_addr *addr,
	67	struct net_device *dev);
	68
	69	extern void rt6_sndmsg(int type, struct in6_addr *dst,
	70	struct in6_addr *src,
	71	struct in6_addr *gw,
	72	struct net_device *dev,
	73	int dstlen, int srclen,
	74	int metric, __u32 flags);
	75
	76	extern struct rt6_info rt6_lookup(struct in6_addr daddr,
	77	struct in6_addr *saddr,
	78	int oif, int flags);
	79
	80	extern struct dst_entry ndisc_dst_alloc(struct net_device dev,
	81	struct neighbour *neigh,
	82	struct in6_addr *addr,
	83	int (output)(struct sk_buff ));
	84	extern int ndisc_dst_gc(int *more);
	85	extern void fib6_force_start_gc(void);
	86
	87	extern struct rt6_info addrconf_dst_alloc(struct inet6_dev idev,
	88	const struct in6_addr *addr,
	89	int anycast);
	90
	91	/*
	92	* support functions for ND
	93	*
	94	*/
	95	extern struct rt6_info * rt6_get_dflt_router(struct in6_addr *addr,
	96	struct net_device *dev);
	97	extern struct rt6_info * rt6_add_dflt_router(struct in6_addr *gwaddr,
ebacaaa0 YH	98	struct net_device *dev,
ebacaaa0 YH	99	unsigned int pref);
1da177e4 LT	100
	101	extern void rt6_purge_dflt_routers(void);
	102
70ceb4f5 YH	103	extern int rt6_route_rcv(struct net_device *dev,
	104	u8 *opt, int len,
	105	struct in6_addr *gwaddr);
	106
1da177e4	107	extern void rt6_redirect(struct in6_addr *dest,
5e032e32	108	struct in6_addr *src,
1da177e4 LT	109	struct in6_addr *saddr,
	110	struct neighbour *neigh,
	111	u8 *lladdr,
	112	int on_link);
	113
	114	extern void rt6_pmtu_discovery(struct in6_addr *daddr,
	115	struct in6_addr *saddr,
	116	struct net_device *dev,
	117	u32 pmtu);
	118
	119	struct nlmsghdr;
	120	struct netlink_callback;
	121	extern int inet6_dump_fib(struct sk_buff skb, struct netlink_callback cb);
	122	extern int inet6_rtm_newroute(struct sk_buff skb, struct nlmsghdr nlh, void *arg);
	123	extern int inet6_rtm_delroute(struct sk_buff skb, struct nlmsghdr nlh, void *arg);
	124	extern int inet6_rtm_getroute(struct sk_buff skb, struct nlmsghdr nlh, void *arg);
	125
1b43af54 PM	126	struct rt6_rtnl_dump_arg
	127	{
	128	struct sk_buff *skb;
	129	struct netlink_callback *cb;
	130	};
	131
	132	extern int rt6_dump_route(struct rt6_info rt, void p_arg);
1da177e4 LT	133	extern void rt6_ifdown(struct net_device *dev);
	134	extern void rt6_mtu_change(struct net_device *dev, unsigned mtu);
	135
	136	extern rwlock_t rt6_lock;
	137
	138	/*
	139	* Store a destination cache entry in a socket
	140	*/
497c615a	141	static inline void __ip6_dst_store(struct sock sk, struct dst_entry dst,
8e1ef0a9	142	struct in6_addr daddr, struct in6_addr saddr)
1da177e4 LT	143	{
	144	struct ipv6_pinfo *np = inet6_sk(sk);
	145	struct rt6_info rt = (struct rt6_info ) dst;
	146
f83ef8c0	147	sk_setup_caps(sk, dst);
1da177e4	148	np->daddr_cache = daddr;
8e1ef0a9 YH	149	#ifdef CONFIG_IPV6_SUBTREES
	150	np->saddr_cache = saddr;
	151	#endif
1da177e4	152	np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
497c615a HX	153	}
	154
	155	static inline void ip6_dst_store(struct sock sk, struct dst_entry dst,
8e1ef0a9	156	struct in6_addr daddr, struct in6_addr saddr)
497c615a HX	157	{
497c615a HX	158	write_lock(&sk->sk_dst_lock);
8e1ef0a9	159	__ip6_dst_store(sk, dst, daddr, saddr);
1da177e4 LT	160	write_unlock(&sk->sk_dst_lock);
	161	}
	162
	163	static inline int ipv6_unicast_destination(struct sk_buff *skb)
	164	{
	165	struct rt6_info rt = (struct rt6_info ) skb->dst;
	166
	167	return rt->rt6i_flags & RTF_LOCAL;
	168	}
	169
	170	#endif
	171	#endif