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

#ifndef _NET_IP6_ROUTE_H
#define _NET_IP6_ROUTE_H

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, int create)
{
	if (rt6_has_peer(rt))
		return rt6_peer_ptr(rt);

	rt6_bind_peer(rt, create);
	return (rt6_has_peer(rt) ? rt6_peer_ptr(rt) : NULL);
}

static inline struct inet_peer *rt6_get_peer(struct rt6_info *rt)
{
	return __rt6_get_peer(rt, 0);
}

static inline struct inet_peer *rt6_get_peer_create(struct rt6_info *rt)
{
	return __rt6_get_peer(rt, 1);
}

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 ip6_update_pmtu(struct sk_buff *skb, struct net *net, __be32 mtu,
			    int oif, u32 mark);
extern void ip6_sk_update_pmtu(struct sk_buff *skb, struct sock *sk,
			       __be32 mtu);
extern void ip6_redirect(struct sk_buff *skb, struct net *net, int oif, u32 mark);
extern void ip6_sk_redirect(struct sk_buff *skb, struct sock *sk);

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,
				   const struct in6_addr *daddr,
				   const 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
70ceb4f5 YH	4	struct route_info {
	5	__u8 type;
	6	__u8 length;
	7	__u8 prefix_len;
	8	#if defined(__BIG_ENDIAN_BITFIELD)
	9	__u8 reserved_h:3,
	10	route_pref:2,
	11	reserved_l:3;
	12	#elif defined(__LITTLE_ENDIAN_BITFIELD)
	13	__u8 reserved_l:3,
	14	route_pref:2,
	15	reserved_h:3;
	16	#endif
e69a4adc	17	__be32 lifetime;
70ceb4f5 YH	18	__u8 prefix[0]; /* 0,8 or 16 */
	19	};
	20
1da177e4 LT	21	#include <net/flow.h>
	22	#include <net/ip6_fib.h>
	23	#include <net/sock.h>
1da177e4 LT	24	#include <linux/ip.h>
	25	#include <linux/ipv6.h>
	26
7cbca67c YH	27	#define RT6_LOOKUP_F_IFACE 0x00000001
	28	#define RT6_LOOKUP_F_REACHABLE 0x00000002
	29	#define RT6_LOOKUP_F_HAS_SADDR 0x00000004
	30	#define RT6_LOOKUP_F_SRCPREF_TMP 0x00000008
	31	#define RT6_LOOKUP_F_SRCPREF_PUBLIC 0x00000010
	32	#define RT6_LOOKUP_F_SRCPREF_COA 0x00000020
77d16f45	33
0c9a2ac1 YH	34	/*
	35	* rt6_srcprefs2flags() and rt6_flags2srcprefs() translate
	36	* between IPV6_ADDR_PREFERENCES socket option values
	37	* IPV6_PREFER_SRC_TMP = 0x1
	38	* IPV6_PREFER_SRC_PUBLIC = 0x2
	39	* IPV6_PREFER_SRC_COA = 0x4
	40	* and above RT6_LOOKUP_F_SRCPREF_xxx flags.
	41	*/
	42	static inline int rt6_srcprefs2flags(unsigned int srcprefs)
	43	{
	44	/* No need to bitmask because srcprefs have only 3 bits. */
	45	return srcprefs << 3;
	46	}
	47
	48	static inline unsigned int rt6_flags2srcprefs(int flags)
	49	{
	50	return (flags >> 3) & 7;
	51	}
1da177e4	52
fbfe95a4	53	extern void rt6_bind_peer(struct rt6_info *rt, int create);
b3419363	54
fbfe95a4	55	static inline struct inet_peer __rt6_get_peer(struct rt6_info rt, int create)
15c05425	56	{
97bab73f DM	57	if (rt6_has_peer(rt))
97bab73f DM	58	return rt6_peer_ptr(rt);
15c05425	59
fbfe95a4	60	rt6_bind_peer(rt, create);
55afabaa	61	return (rt6_has_peer(rt) ? rt6_peer_ptr(rt) : NULL);
15c05425 DM	62	}
15c05425 DM	63
fbfe95a4 DM	64	static inline struct inet_peer rt6_get_peer(struct rt6_info rt)
	65	{
	66	return __rt6_get_peer(rt, 0);
	67	}
	68
	69	static inline struct inet_peer rt6_get_peer_create(struct rt6_info rt)
	70	{
	71	return __rt6_get_peer(rt, 1);
	72	}
	73
1da177e4 LT	74	extern void ip6_route_input(struct sk_buff *skb);
1da177e4 LT	75
4591db4f	76	extern struct dst_entry * ip6_route_output(struct net *net,
9c7a4f9c	77	const struct sock *sk,
4c9483b2	78	struct flowi6 *fl6);
ea6e574e FW	79	extern struct dst_entry * ip6_route_lookup(struct net *net,
ea6e574e FW	80	struct flowi6 *fl6, int flags);
1da177e4	81
433d49c3	82	extern int ip6_route_init(void);
1da177e4 LT	83	extern void ip6_route_cleanup(void);
1da177e4 LT	84
5578689a DL	85	extern int ipv6_route_ioctl(struct net *net,
	86	unsigned int cmd,
	87	void __user *arg);
1da177e4	88
86872cb5	89	extern int ip6_route_add(struct fib6_config *cfg);
40e22e8f	90	extern int ip6_ins_rt(struct rt6_info *);
e0a1ad73	91	extern int ip6_del_rt(struct rt6_info *);
1da177e4	92
c3968a85 DW	93	extern int ip6_route_get_saddr(struct net *net,
c3968a85 DW	94	struct rt6_info *rt,
b71d1d42	95	const struct in6_addr *daddr,
c3968a85 DW	96	unsigned int prefs,
	97	struct in6_addr *saddr);
	98
606a2b48	99	extern struct rt6_info rt6_lookup(struct net net,
9acd9f3a YH	100	const struct in6_addr *daddr,
9acd9f3a YH	101	const struct in6_addr *saddr,
1da177e4 LT	102	int oif, int flags);
1da177e4 LT	103
3b00944c	104	extern struct dst_entry icmp6_dst_alloc(struct net_device dev,
1da177e4	105	struct neighbour *neigh,
87a11578	106	struct flowi6 *fl6);
3d0f24a7	107	extern int icmp6_dst_gc(void);
3b00944c	108
63152fc0	109	extern void fib6_force_start_gc(struct net *net);
1da177e4 LT	110
	111	extern struct rt6_info addrconf_dst_alloc(struct inet6_dev idev,
	112	const struct in6_addr *addr,
8f031519	113	bool anycast);
1da177e4	114
6b75d090 YH	115	extern int ip6_dst_hoplimit(struct dst_entry *dst);
6b75d090 YH	116
1da177e4 LT	117	/*
	118	* support functions for ND
	119	*
	120	*/
b71d1d42	121	extern struct rt6_info * rt6_get_dflt_router(const struct in6_addr *addr,
1da177e4	122	struct net_device *dev);
b71d1d42	123	extern struct rt6_info * rt6_add_dflt_router(const struct in6_addr *gwaddr,
ebacaaa0 YH	124	struct net_device *dev,
ebacaaa0 YH	125	unsigned int pref);
1da177e4	126
7b4da532	127	extern void rt6_purge_dflt_routers(struct net *net);
1da177e4	128
70ceb4f5 YH	129	extern int rt6_route_rcv(struct net_device *dev,
70ceb4f5 YH	130	u8 *opt, int len,
b71d1d42	131	const struct in6_addr *gwaddr);
70ceb4f5	132
81aded24 DM	133	extern void ip6_update_pmtu(struct sk_buff skb, struct net net, __be32 mtu,
	134	int oif, u32 mark);
	135	extern void ip6_sk_update_pmtu(struct sk_buff skb, struct sock sk,
	136	__be32 mtu);
3a5ad2ee DM	137	extern void ip6_redirect(struct sk_buff skb, struct net net, int oif, u32 mark);
3a5ad2ee DM	138	extern void ip6_sk_redirect(struct sk_buff skb, struct sock sk);
1da177e4	139
1da177e4	140	struct netlink_callback;
1da177e4	141
fd2c3ef7	142	struct rt6_rtnl_dump_arg {
1b43af54 PM	143	struct sk_buff *skb;
1b43af54 PM	144	struct netlink_callback *cb;
191cd582	145	struct net *net;
1b43af54 PM	146	};
	147
	148	extern int rt6_dump_route(struct rt6_info rt, void p_arg);
f3db4851	149	extern void rt6_ifdown(struct net net, struct net_device dev);
95c96174	150	extern void rt6_mtu_change(struct net_device *dev, unsigned int mtu);
c3968a85	151	extern void rt6_remove_prefsrc(struct inet6_ifaddr *ifp);
1da177e4	152
1da177e4 LT	153
	154	/*
	155	* Store a destination cache entry in a socket
	156	*/
497c615a	157	static inline void __ip6_dst_store(struct sock sk, struct dst_entry dst,
d3818c92 ED	158	const struct in6_addr *daddr,
d3818c92 ED	159	const struct in6_addr *saddr)
1da177e4 LT	160	{
	161	struct ipv6_pinfo *np = inet6_sk(sk);
	162	struct rt6_info rt = (struct rt6_info ) dst;
	163
f83ef8c0	164	sk_setup_caps(sk, dst);
1da177e4	165	np->daddr_cache = daddr;
8e1ef0a9 YH	166	#ifdef CONFIG_IPV6_SUBTREES
	167	np->saddr_cache = saddr;
	168	#endif
1da177e4	169	np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
497c615a HX	170	}
	171
	172	static inline void ip6_dst_store(struct sock sk, struct dst_entry dst,
8e1ef0a9	173	struct in6_addr daddr, struct in6_addr saddr)
497c615a	174	{
b6c6712a	175	spin_lock(&sk->sk_dst_lock);
8e1ef0a9	176	__ip6_dst_store(sk, dst, daddr, saddr);
b6c6712a	177	spin_unlock(&sk->sk_dst_lock);
1da177e4 LT	178	}
1da177e4 LT	179
a50feda5	180	static inline bool ipv6_unicast_destination(const struct sk_buff *skb)
1da177e4	181	{
adf30907	182	struct rt6_info rt = (struct rt6_info ) skb_dst(skb);
1da177e4 LT	183
	184	return rt->rt6i_flags & RTF_LOCAL;
	185	}
	186
ad0081e4 DS	187	int ip6_fragment(struct sk_buff skb, int (output)(struct sk_buff *));
	188
	189	static inline int ip6_skb_dst_mtu(struct sk_buff *skb)
	190	{
	191	struct ipv6_pinfo *np = skb->sk ? inet6_sk(skb->sk) : NULL;
	192
	193	return (np && np->pmtudisc == IPV6_PMTUDISC_PROBE) ?
	194	skb_dst(skb)->dev->mtu : dst_mtu(skb_dst(skb));
	195	}
	196
1da177e4	197	#endif