[linux.git] / include / net / ip6_route.h

#ifndef _NET_IP6_ROUTE_H
#define _NET_IP6_ROUTE_H

#define IP6_RT_PRIO_USER	1024
#define IP6_RT_PRIO_ADDRCONF	256

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
	__be32			lifetime;
	__u8			prefix[0];	/* 0,8 or 16 */
};

#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		0x00000001
#define RT6_LOOKUP_F_REACHABLE		0x00000002
#define RT6_LOOKUP_F_HAS_SADDR		0x00000004
#define RT6_LOOKUP_F_SRCPREF_TMP	0x00000008
#define RT6_LOOKUP_F_SRCPREF_PUBLIC	0x00000010
#define RT6_LOOKUP_F_SRCPREF_COA	0x00000020

/*
 * rt6_srcprefs2flags() and rt6_flags2srcprefs() translate
 * between IPV6_ADDR_PREFERENCES socket option values
 *	IPV6_PREFER_SRC_TMP    = 0x1
 *	IPV6_PREFER_SRC_PUBLIC = 0x2
 *	IPV6_PREFER_SRC_COA    = 0x4
 * and above RT6_LOOKUP_F_SRCPREF_xxx flags.
 */
static inline int rt6_srcprefs2flags(unsigned int srcprefs)
{
	/* No need to bitmask because srcprefs have only 3 bits. */
	return srcprefs << 3;
}

static inline unsigned int rt6_flags2srcprefs(int flags)
{
	return (flags >> 3) & 7;
}

extern void			rt6_bind_peer(struct rt6_info *rt,
					      int create);

static inline struct inet_peer *rt6_get_peer(struct rt6_info *rt)
{
	if (rt->rt6i_peer)
		return rt->rt6i_peer;

	rt6_bind_peer(rt, 0);
	return rt->rt6i_peer;
}

extern void			ip6_route_input(struct sk_buff *skb);

extern struct dst_entry *	ip6_route_output(struct net *net,
						 const struct sock *sk,
						 struct flowi6 *fl6);
extern struct dst_entry *	ip6_route_lookup(struct net *net,
						 struct flowi6 *fl6, int flags);

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

extern int			ipv6_route_ioctl(struct net *net,
						 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_route_get_saddr(struct net *net,
						    struct rt6_info *rt,
						    const struct in6_addr *daddr,
						    unsigned int prefs,
						    struct in6_addr *saddr);

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

extern struct dst_entry *icmp6_dst_alloc(struct net_device *dev,
					 struct neighbour *neigh,
					 struct flowi6 *fl6);
extern int icmp6_dst_gc(void);

extern void fib6_force_start_gc(struct net *net);

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

extern int			ip6_dst_hoplimit(struct dst_entry *dst);

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

extern void			rt6_purge_dflt_routers(struct net *net);

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

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

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

struct netlink_callback;

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

extern int rt6_dump_route(struct rt6_info *rt, void *p_arg);
extern void rt6_ifdown(struct net *net, struct net_device *dev);
extern void rt6_mtu_change(struct net_device *dev, unsigned int mtu);
extern void rt6_remove_prefsrc(struct inet6_ifaddr *ifp);


/*
 *	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)
{
	spin_lock(&sk->sk_dst_lock);
	__ip6_dst_store(sk, dst, daddr, saddr);
	spin_unlock(&sk->sk_dst_lock);
}

static inline bool ipv6_unicast_destination(const struct sk_buff *skb)
{
	struct rt6_info *rt = (struct rt6_info *) skb_dst(skb);

	return rt->rt6i_flags & RTF_LOCAL;
}

int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *));

static inline int ip6_skb_dst_mtu(struct sk_buff *skb)
{
	struct ipv6_pinfo *np = skb->sk ? inet6_sk(skb->sk) : NULL;

	return (np && np->pmtudisc == IPV6_PMTUDISC_PROBE) ?
	       skb_dst(skb)->dev->mtu : dst_mtu(skb_dst(skb));
}

#endif
Commit	Line	Data
1da177e4 LT	1	#ifndef _NET_IP6_ROUTE_H
	2	#define _NET_IP6_ROUTE_H
	3
1da177e4 LT	4	#define IP6_RT_PRIO_USER 1024
1da177e4 LT	5	#define IP6_RT_PRIO_ADDRCONF 256
1da177e4	6
70ceb4f5 YH	7	struct 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
e69a4adc	20	__be32 lifetime;
70ceb4f5 YH	21	__u8 prefix[0]; /* 0,8 or 16 */
	22	};
	23
1da177e4 LT	24	#include <net/flow.h>
	25	#include <net/ip6_fib.h>
	26	#include <net/sock.h>
1da177e4 LT	27	#include <linux/ip.h>
	28	#include <linux/ipv6.h>
	29
7cbca67c YH	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
77d16f45	36
0c9a2ac1 YH	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	*/
	45	static 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
	51	static inline unsigned int rt6_flags2srcprefs(int flags)
	52	{
	53	return (flags >> 3) & 7;
	54	}
1da177e4	55
b3419363 DM	56	extern void rt6_bind_peer(struct rt6_info *rt,
	57	int create);
	58
15c05425 DM	59	static inline struct inet_peer rt6_get_peer(struct rt6_info rt)
	60	{
	61	if (rt->rt6i_peer)
	62	return rt->rt6i_peer;
	63
	64	rt6_bind_peer(rt, 0);
	65	return rt->rt6i_peer;
	66	}
	67
1da177e4 LT	68	extern void ip6_route_input(struct sk_buff *skb);
1da177e4 LT	69
4591db4f	70	extern struct dst_entry * ip6_route_output(struct net *net,
9c7a4f9c	71	const struct sock *sk,
4c9483b2	72	struct flowi6 *fl6);
ea6e574e FW	73	extern struct dst_entry * ip6_route_lookup(struct net *net,
ea6e574e FW	74	struct flowi6 *fl6, int flags);
1da177e4	75
433d49c3	76	extern int ip6_route_init(void);
1da177e4 LT	77	extern void ip6_route_cleanup(void);
1da177e4 LT	78
5578689a DL	79	extern int ipv6_route_ioctl(struct net *net,
	80	unsigned int cmd,
	81	void __user *arg);
1da177e4	82
86872cb5	83	extern int ip6_route_add(struct fib6_config *cfg);
40e22e8f	84	extern int ip6_ins_rt(struct rt6_info *);
e0a1ad73	85	extern int ip6_del_rt(struct rt6_info *);
1da177e4	86
c3968a85 DW	87	extern int ip6_route_get_saddr(struct net *net,
c3968a85 DW	88	struct rt6_info *rt,
b71d1d42	89	const struct in6_addr *daddr,
c3968a85 DW	90	unsigned int prefs,
	91	struct in6_addr *saddr);
	92
606a2b48	93	extern struct rt6_info rt6_lookup(struct net net,
9acd9f3a YH	94	const struct in6_addr *daddr,
9acd9f3a YH	95	const struct in6_addr *saddr,
1da177e4 LT	96	int oif, int flags);
1da177e4 LT	97
3b00944c	98	extern struct dst_entry icmp6_dst_alloc(struct net_device dev,
1da177e4	99	struct neighbour *neigh,
87a11578	100	struct flowi6 *fl6);
3d0f24a7	101	extern int icmp6_dst_gc(void);
3b00944c	102
63152fc0	103	extern void fib6_force_start_gc(struct net *net);
1da177e4 LT	104
	105	extern struct rt6_info addrconf_dst_alloc(struct inet6_dev idev,
	106	const struct in6_addr *addr,
8f031519	107	bool anycast);
1da177e4	108
6b75d090 YH	109	extern int ip6_dst_hoplimit(struct dst_entry *dst);
6b75d090 YH	110
1da177e4 LT	111	/*
	112	* support functions for ND
	113	*
	114	*/
b71d1d42	115	extern struct rt6_info * rt6_get_dflt_router(const struct in6_addr *addr,
1da177e4	116	struct net_device *dev);
b71d1d42	117	extern struct rt6_info * rt6_add_dflt_router(const struct in6_addr *gwaddr,
ebacaaa0 YH	118	struct net_device *dev,
ebacaaa0 YH	119	unsigned int pref);
1da177e4	120
7b4da532	121	extern void rt6_purge_dflt_routers(struct net *net);
1da177e4	122
70ceb4f5 YH	123	extern int rt6_route_rcv(struct net_device *dev,
70ceb4f5 YH	124	u8 *opt, int len,
b71d1d42	125	const struct in6_addr *gwaddr);
70ceb4f5	126
b71d1d42 ED	127	extern void rt6_redirect(const struct in6_addr *dest,
	128	const struct in6_addr *src,
	129	const struct in6_addr *saddr,
1da177e4 LT	130	struct neighbour *neigh,
	131	u8 *lladdr,
	132	int on_link);
	133
b71d1d42 ED	134	extern void rt6_pmtu_discovery(const struct in6_addr *daddr,
b71d1d42 ED	135	const struct in6_addr *saddr,
1da177e4 LT	136	struct net_device *dev,
	137	u32 pmtu);
	138
1da177e4	139	struct netlink_callback;
1da177e4	140
fd2c3ef7	141	struct rt6_rtnl_dump_arg {
1b43af54 PM	142	struct sk_buff *skb;
1b43af54 PM	143	struct netlink_callback *cb;
191cd582	144	struct net *net;
1b43af54 PM	145	};
	146
	147	extern int rt6_dump_route(struct rt6_info rt, void p_arg);
f3db4851	148	extern void rt6_ifdown(struct net net, struct net_device dev);
95c96174	149	extern void rt6_mtu_change(struct net_device *dev, unsigned int mtu);
c3968a85	150	extern void rt6_remove_prefsrc(struct inet6_ifaddr *ifp);
1da177e4	151
1da177e4 LT	152
	153	/*
	154	* Store a destination cache entry in a socket
	155	*/
497c615a	156	static inline void __ip6_dst_store(struct sock sk, struct dst_entry dst,
8e1ef0a9	157	struct in6_addr daddr, struct in6_addr saddr)
1da177e4 LT	158	{
	159	struct ipv6_pinfo *np = inet6_sk(sk);
	160	struct rt6_info rt = (struct rt6_info ) dst;
	161
f83ef8c0	162	sk_setup_caps(sk, dst);
1da177e4	163	np->daddr_cache = daddr;
8e1ef0a9 YH	164	#ifdef CONFIG_IPV6_SUBTREES
	165	np->saddr_cache = saddr;
	166	#endif
1da177e4	167	np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
497c615a HX	168	}
	169
	170	static inline void ip6_dst_store(struct sock sk, struct dst_entry dst,
8e1ef0a9	171	struct in6_addr daddr, struct in6_addr saddr)
497c615a	172	{
b6c6712a	173	spin_lock(&sk->sk_dst_lock);
8e1ef0a9	174	__ip6_dst_store(sk, dst, daddr, saddr);
b6c6712a	175	spin_unlock(&sk->sk_dst_lock);
1da177e4 LT	176	}
1da177e4 LT	177
a50feda5	178	static inline bool ipv6_unicast_destination(const struct sk_buff *skb)
1da177e4	179	{
adf30907	180	struct rt6_info rt = (struct rt6_info ) skb_dst(skb);
1da177e4 LT	181
	182	return rt->rt6i_flags & RTF_LOCAL;
	183	}
	184
ad0081e4 DS	185	int ip6_fragment(struct sk_buff skb, int (output)(struct sk_buff *));
	186
	187	static inline int ip6_skb_dst_mtu(struct sk_buff *skb)
	188	{
	189	struct ipv6_pinfo *np = skb->sk ? inet6_sk(skb->sk) : NULL;
	190
	191	return (np && np->pmtudisc == IPV6_PMTUDISC_PROBE) ?
	192	skb_dst(skb)->dev->mtu : dst_mtu(skb_dst(skb));
	193	}
	194
1da177e4	195	#endif