[net-next-2.6.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
#define IP6_RT_PRIO_KERN	512

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 */
};

#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		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			ip6_route_input(struct sk_buff *skb);

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

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 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,
					 const struct in6_addr *addr);
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,
					   int anycast);

extern int			ip6_dst_hoplimit(struct dst_entry *dst);

/*
 *	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(struct net *net);

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 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 mtu);


/*
 *	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 int ipv6_unicast_destination(struct sk_buff *skb)
{
	struct rt6_info *rt = (struct rt6_info *) skb_dst(skb);

	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
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	8	struct 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
7cbca67c YH	33	#define RT6_LOOKUP_F_IFACE 0x00000001
	34	#define RT6_LOOKUP_F_REACHABLE 0x00000002
	35	#define RT6_LOOKUP_F_HAS_SADDR 0x00000004
	36	#define RT6_LOOKUP_F_SRCPREF_TMP 0x00000008
	37	#define RT6_LOOKUP_F_SRCPREF_PUBLIC 0x00000010
	38	#define RT6_LOOKUP_F_SRCPREF_COA 0x00000020
77d16f45	39
0c9a2ac1 YH	40	/*
	41	* rt6_srcprefs2flags() and rt6_flags2srcprefs() translate
	42	* between IPV6_ADDR_PREFERENCES socket option values
	43	* IPV6_PREFER_SRC_TMP = 0x1
	44	* IPV6_PREFER_SRC_PUBLIC = 0x2
	45	* IPV6_PREFER_SRC_COA = 0x4
	46	* and above RT6_LOOKUP_F_SRCPREF_xxx flags.
	47	*/
	48	static inline int rt6_srcprefs2flags(unsigned int srcprefs)
	49	{
	50	/* No need to bitmask because srcprefs have only 3 bits. */
	51	return srcprefs << 3;
	52	}
	53
	54	static inline unsigned int rt6_flags2srcprefs(int flags)
	55	{
	56	return (flags >> 3) & 7;
	57	}
1da177e4	58
1da177e4 LT	59	extern void ip6_route_input(struct sk_buff *skb);
1da177e4 LT	60
4591db4f DL	61	extern struct dst_entry * ip6_route_output(struct net *net,
4591db4f DL	62	struct sock *sk,
1da177e4 LT	63	struct flowi *fl);
1da177e4 LT	64
433d49c3	65	extern int ip6_route_init(void);
1da177e4 LT	66	extern void ip6_route_cleanup(void);
1da177e4 LT	67
5578689a DL	68	extern int ipv6_route_ioctl(struct net *net,
	69	unsigned int cmd,
	70	void __user *arg);
1da177e4	71
86872cb5	72	extern int ip6_route_add(struct fib6_config *cfg);
40e22e8f	73	extern int ip6_ins_rt(struct rt6_info *);
e0a1ad73	74	extern int ip6_del_rt(struct rt6_info *);
1da177e4	75
606a2b48	76	extern struct rt6_info rt6_lookup(struct net net,
9acd9f3a YH	77	const struct in6_addr *daddr,
9acd9f3a YH	78	const struct in6_addr *saddr,
1da177e4 LT	79	int oif, int flags);
1da177e4 LT	80
3b00944c	81	extern struct dst_entry icmp6_dst_alloc(struct net_device dev,
1da177e4	82	struct neighbour *neigh,
9acd9f3a	83	const struct in6_addr *addr);
3d0f24a7	84	extern int icmp6_dst_gc(void);
3b00944c	85
63152fc0	86	extern void fib6_force_start_gc(struct net *net);
1da177e4 LT	87
	88	extern struct rt6_info addrconf_dst_alloc(struct inet6_dev idev,
	89	const struct in6_addr *addr,
	90	int anycast);
	91
6b75d090 YH	92	extern int ip6_dst_hoplimit(struct dst_entry *dst);
6b75d090 YH	93
1da177e4 LT	94	/*
	95	* support functions for ND
	96	*
	97	*/
	98	extern struct rt6_info * rt6_get_dflt_router(struct in6_addr *addr,
	99	struct net_device *dev);
	100	extern struct rt6_info * rt6_add_dflt_router(struct in6_addr *gwaddr,
ebacaaa0 YH	101	struct net_device *dev,
ebacaaa0 YH	102	unsigned int pref);
1da177e4	103
7b4da532	104	extern void rt6_purge_dflt_routers(struct net *net);
1da177e4	105
70ceb4f5 YH	106	extern int rt6_route_rcv(struct net_device *dev,
	107	u8 *opt, int len,
	108	struct in6_addr *gwaddr);
	109
1da177e4	110	extern void rt6_redirect(struct in6_addr *dest,
5e032e32	111	struct in6_addr *src,
1da177e4 LT	112	struct in6_addr *saddr,
	113	struct neighbour *neigh,
	114	u8 *lladdr,
	115	int on_link);
	116
	117	extern void rt6_pmtu_discovery(struct in6_addr *daddr,
	118	struct in6_addr *saddr,
	119	struct net_device *dev,
	120	u32 pmtu);
	121
1da177e4	122	struct netlink_callback;
1da177e4	123
fd2c3ef7	124	struct rt6_rtnl_dump_arg {
1b43af54 PM	125	struct sk_buff *skb;
1b43af54 PM	126	struct netlink_callback *cb;
191cd582	127	struct net *net;
1b43af54 PM	128	};
	129
	130	extern int rt6_dump_route(struct rt6_info rt, void p_arg);
f3db4851	131	extern void rt6_ifdown(struct net net, struct net_device dev);
1da177e4 LT	132	extern void rt6_mtu_change(struct net_device *dev, unsigned mtu);
1da177e4 LT	133
1da177e4 LT	134
	135	/*
	136	* Store a destination cache entry in a socket
	137	*/
497c615a	138	static 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
	152	static inline void ip6_dst_store(struct sock sk, struct dst_entry dst,
8e1ef0a9	153	struct in6_addr daddr, struct in6_addr saddr)
497c615a	154	{
b6c6712a	155	spin_lock(&sk->sk_dst_lock);
8e1ef0a9	156	__ip6_dst_store(sk, dst, daddr, saddr);
b6c6712a	157	spin_unlock(&sk->sk_dst_lock);
1da177e4 LT	158	}
	159
	160	static inline int ipv6_unicast_destination(struct sk_buff *skb)
	161	{
adf30907	162	struct rt6_info rt = (struct rt6_info ) skb_dst(skb);
1da177e4 LT	163
	164	return rt->rt6i_flags & RTF_LOCAL;
	165	}
	166
	167	#endif
	168	#endif