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

#ifndef _ADDRCONF_H
#define _ADDRCONF_H

#define MAX_RTR_SOLICITATIONS		3
#define RTR_SOLICITATION_INTERVAL	(4*HZ)

#define MIN_VALID_LIFETIME		(2*3600)	/* 2 hours */

#define TEMP_VALID_LIFETIME		(7*86400)
#define TEMP_PREFERRED_LIFETIME		(86400)
#define REGEN_MAX_RETRY			(3)
#define MAX_DESYNC_FACTOR		(600)

#define ADDR_CHECK_FREQUENCY		(120*HZ)

#define IPV6_MAX_ADDRESSES		16

#include <linux/in.h>
#include <linux/in6.h>

struct prefix_info {
	__u8			type;
	__u8			length;
	__u8			prefix_len;

#if defined(__BIG_ENDIAN_BITFIELD)
	__u8			onlink : 1,
			 	autoconf : 1,
				reserved : 6;
#elif defined(__LITTLE_ENDIAN_BITFIELD)
	__u8			reserved : 6,
				autoconf : 1,
				onlink : 1;
#else
#error "Please fix <asm/byteorder.h>"
#endif
	__be32			valid;
	__be32			prefered;
	__be32			reserved2;

	struct in6_addr		prefix;
};


#include <linux/netdevice.h>
#include <net/if_inet6.h>
#include <net/ipv6.h>

#define IN6_ADDR_HSIZE		16

extern int			addrconf_init(void);
extern void			addrconf_cleanup(void);

extern int			addrconf_add_ifaddr(struct net *net,
						    void __user *arg);
extern int			addrconf_del_ifaddr(struct net *net,
						    void __user *arg);
extern int			addrconf_set_dstaddr(struct net *net,
						     void __user *arg);

extern int			ipv6_chk_addr(struct net *net,
					      const struct in6_addr *addr,
					      struct net_device *dev,
					      int strict);

#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
extern int			ipv6_chk_home_addr(struct net *net,
						   const struct in6_addr *addr);
#endif

extern int			ipv6_chk_prefix(const struct in6_addr *addr,
						struct net_device *dev);

extern struct inet6_ifaddr      *ipv6_get_ifaddr(struct net *net,
						 const struct in6_addr *addr,
						 struct net_device *dev,
						 int strict);

extern int			ipv6_dev_get_saddr(struct net *net,
					       struct net_device *dev,
					       const struct in6_addr *daddr,
					       unsigned int srcprefs,
					       struct in6_addr *saddr);
extern int			ipv6_get_lladdr(struct net_device *dev,
						struct in6_addr *addr,
						unsigned char banned_flags);
extern int 			ipv6_rcv_saddr_equal(const struct sock *sk,
						    const struct sock *sk2);
extern void			addrconf_join_solict(struct net_device *dev,
					const struct in6_addr *addr);
extern void			addrconf_leave_solict(struct inet6_dev *idev,
					const struct in6_addr *addr);

static inline unsigned long addrconf_timeout_fixup(u32 timeout,
						   unsigned int unit)
{
	if (timeout == 0xffffffff)
		return ~0UL;

	/*
	 * Avoid arithmetic overflow.
	 * Assuming unit is constant and non-zero, this "if" statement
	 * will go away on 64bit archs.
	 */
	if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
		return LONG_MAX / unit;

	return timeout;
}

static inline int addrconf_finite_timeout(unsigned long timeout)
{
	return ~timeout;
}

/*
 *	IPv6 Address Label subsystem (addrlabel.c)
 */
extern int			ipv6_addr_label_init(void);
extern void			ipv6_addr_label_cleanup(void);
extern void			ipv6_addr_label_rtnl_register(void);
extern u32			ipv6_addr_label(struct net *net,
						const struct in6_addr *addr,
						int type, int ifindex);

/*
 *	multicast prototypes (mcast.c)
 */
extern int ipv6_sock_mc_join(struct sock *sk, int ifindex,
			     const struct in6_addr *addr);
extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
			     const struct in6_addr *addr);
extern void ipv6_sock_mc_close(struct sock *sk);
extern bool inet6_mc_check(struct sock *sk,
			   const struct in6_addr *mc_addr,
			   const struct in6_addr *src_addr);

extern int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
extern int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
extern void ipv6_mc_up(struct inet6_dev *idev);
extern void ipv6_mc_down(struct inet6_dev *idev);
extern void ipv6_mc_unmap(struct inet6_dev *idev);
extern void ipv6_mc_remap(struct inet6_dev *idev);
extern void ipv6_mc_init_dev(struct inet6_dev *idev);
extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);

extern bool ipv6_chk_mcast_addr(struct net_device *dev,
				const struct in6_addr *group,
				const struct in6_addr *src_addr);
extern bool ipv6_is_mld(struct sk_buff *skb, int nexthdr);

extern void addrconf_prefix_rcv(struct net_device *dev,
				u8 *opt, int len, bool sllao);

/*
 *	anycast prototypes (anycast.c)
 */
extern int ipv6_sock_ac_join(struct sock *sk,int ifindex, const struct in6_addr *addr);
extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex, const struct in6_addr *addr);
extern void ipv6_sock_ac_close(struct sock *sk);

extern int ipv6_dev_ac_inc(struct net_device *dev, const struct in6_addr *addr);
extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr);
extern bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
				const struct in6_addr *addr);


/* Device notifier */
extern int register_inet6addr_notifier(struct notifier_block *nb);
extern int unregister_inet6addr_notifier(struct notifier_block *nb);

/**
 * __in6_dev_get - get inet6_dev pointer from netdevice
 * @dev: network device
 *
 * Caller must hold rcu_read_lock or RTNL, because this function
 * does not take a reference on the inet6_dev.
 */
static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
{
	return rcu_dereference_rtnl(dev->ip6_ptr);
}

/**
 * in6_dev_get - get inet6_dev pointer from netdevice
 * @dev: network device
 *
 * This version can be used in any context, and takes a reference
 * on the inet6_dev. Callers must use in6_dev_put() later to
 * release this reference.
 */
static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
{
	struct inet6_dev *idev;

	rcu_read_lock();
	idev = rcu_dereference(dev->ip6_ptr);
	if (idev)
		atomic_inc(&idev->refcnt);
	rcu_read_unlock();
	return idev;
}

extern void in6_dev_finish_destroy(struct inet6_dev *idev);

static inline void in6_dev_put(struct inet6_dev *idev)
{
	if (atomic_dec_and_test(&idev->refcnt))
		in6_dev_finish_destroy(idev);
}

static inline void __in6_dev_put(struct inet6_dev *idev)
{
	atomic_dec(&idev->refcnt);
}

static inline void in6_dev_hold(struct inet6_dev *idev)
{
	atomic_inc(&idev->refcnt);
}

extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);

static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
{
	if (atomic_dec_and_test(&ifp->refcnt))
		inet6_ifa_finish_destroy(ifp);
}

static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
{
	atomic_dec(&ifp->refcnt);
}

static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
{
	atomic_inc(&ifp->refcnt);
}


/*
 *	compute link-local solicited-node multicast address
 */

static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
					     struct in6_addr *solicited)
{
	ipv6_addr_set(solicited,
		      htonl(0xFF020000), 0,
		      htonl(0x1),
		      htonl(0xFF000000) | addr->s6_addr32[3]);
}

static inline int ipv6_addr_is_multicast(const struct in6_addr *addr)
{
	return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000);
}

static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
{
	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
		addr->s6_addr32[1] | addr->s6_addr32[2] |
		(addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
}

static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
{
	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
		addr->s6_addr32[1] | addr->s6_addr32[2] |
		(addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
}

static inline int ipv6_addr_is_isatap(const struct in6_addr *addr)
{
	return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
}

#ifdef CONFIG_PROC_FS
extern int if6_proc_init(void);
extern void if6_proc_exit(void);
#endif

#endif
Commit	Line	Data
1da177e4 LT	1	#ifndef _ADDRCONF_H
	2	#define _ADDRCONF_H
	3
1da177e4 LT	4	#define MAX_RTR_SOLICITATIONS 3
	5	#define RTR_SOLICITATION_INTERVAL (4*HZ)
	6
	7	#define MIN_VALID_LIFETIME (23600) / 2 hours */
	8
	9	#define TEMP_VALID_LIFETIME (7*86400)
	10	#define TEMP_PREFERRED_LIFETIME (86400)
76f793e3	11	#define REGEN_MAX_RETRY (3)
1da177e4 LT	12	#define MAX_DESYNC_FACTOR (600)
	13
	14	#define ADDR_CHECK_FREQUENCY (120*HZ)
	15
	16	#define IPV6_MAX_ADDRESSES 16
	17
c7dc89c0	18	#include <linux/in.h>
6a800d45 PM	19	#include <linux/in6.h>
6a800d45 PM	20
1da177e4 LT	21	struct prefix_info {
	22	__u8 type;
	23	__u8 length;
	24	__u8 prefix_len;
	25
	26	#if defined(__BIG_ENDIAN_BITFIELD)
	27	__u8 onlink : 1,
	28	autoconf : 1,
	29	reserved : 6;
	30	#elif defined(__LITTLE_ENDIAN_BITFIELD)
	31	__u8 reserved : 6,
	32	autoconf : 1,
	33	onlink : 1;
	34	#else
	35	#error "Please fix <asm/byteorder.h>"
	36	#endif
e69a4adc AV	37	__be32 valid;
	38	__be32 prefered;
	39	__be32 reserved2;
1da177e4 LT	40
	41	struct in6_addr prefix;
	42	};
	43
	44
1da177e4 LT	45	#include <linux/netdevice.h>
1da177e4 LT	46	#include <net/if_inet6.h>
e4553edd	47	#include <net/ipv6.h>
1da177e4 LT	48
	49	#define IN6_ADDR_HSIZE 16
	50
	51	extern int addrconf_init(void);
	52	extern void addrconf_cleanup(void);
	53
af284937 DL	54	extern int addrconf_add_ifaddr(struct net *net,
	55	void __user *arg);
	56	extern int addrconf_del_ifaddr(struct net *net,
	57	void __user *arg);
	58	extern int addrconf_set_dstaddr(struct net *net,
	59	void __user *arg);
1da177e4	60
bfeade08	61	extern int ipv6_chk_addr(struct net *net,
b71d1d42	62	const struct in6_addr *addr,
1da177e4 LT	63	struct net_device *dev,
1da177e4 LT	64	int strict);
bfeade08	65
59fbb3a6	66	#if defined(CONFIG_IPV6_MIP6) \|\| defined(CONFIG_IPV6_MIP6_MODULE)
389f6612	67	extern int ipv6_chk_home_addr(struct net *net,
b71d1d42	68	const struct in6_addr *addr);
65d4ed92	69	#endif
52eeeb84	70
b71d1d42	71	extern int ipv6_chk_prefix(const struct in6_addr *addr,
52eeeb84 YH	72	struct net_device *dev);
52eeeb84 YH	73
1cab3da6	74	extern struct inet6_ifaddr ipv6_get_ifaddr(struct net net,
9acd9f3a	75	const struct in6_addr *addr,
1cab3da6 DL	76	struct net_device *dev,
	77	int strict);
	78
191cd582 BH	79	extern int ipv6_dev_get_saddr(struct net *net,
191cd582 BH	80	struct net_device *dev,
9acd9f3a	81	const struct in6_addr *daddr,
7cbca67c	82	unsigned int srcprefs,
1da177e4	83	struct in6_addr *saddr);
95c385b4 NH	84	extern int ipv6_get_lladdr(struct net_device *dev,
	85	struct in6_addr *addr,
	86	unsigned char banned_flags);
b2f5e7cd VY	87	extern int ipv6_rcv_saddr_equal(const struct sock *sk,
b2f5e7cd VY	88	const struct sock *sk2);
1da177e4	89	extern void addrconf_join_solict(struct net_device *dev,
b71d1d42	90	const struct in6_addr *addr);
1da177e4	91	extern void addrconf_leave_solict(struct inet6_dev *idev,
b71d1d42	92	const struct in6_addr *addr);
1da177e4	93
4bed72e4	94	static inline unsigned long addrconf_timeout_fixup(u32 timeout,
95c96174	95	unsigned int unit)
4bed72e4 YH	96	{
	97	if (timeout == 0xffffffff)
	98	return ~0UL;
	99
	100	/*
	101	* Avoid arithmetic overflow.
	102	* Assuming unit is constant and non-zero, this "if" statement
	103	* will go away on 64bit archs.
	104	*/
	105	if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
	106	return LONG_MAX / unit;
	107
	108	return timeout;
	109	}
	110
	111	static inline int addrconf_finite_timeout(unsigned long timeout)
	112	{
	113	return ~timeout;
	114	}
	115
2a8cc6c8 YH	116	/*
	117	* IPv6 Address Label subsystem (addrlabel.c)
	118	*/
	119	extern int ipv6_addr_label_init(void);
2cc6d2bf	120	extern void ipv6_addr_label_cleanup(void);
2a8cc6c8	121	extern void ipv6_addr_label_rtnl_register(void);
3de23255 BT	122	extern u32 ipv6_addr_label(struct net *net,
3de23255 BT	123	const struct in6_addr *addr,
2a8cc6c8 YH	124	int type, int ifindex);
2a8cc6c8 YH	125
1da177e4 LT	126	/*
	127	* multicast prototypes (mcast.c)
	128	*/
9acd9f3a YH	129	extern int ipv6_sock_mc_join(struct sock *sk, int ifindex,
	130	const struct in6_addr *addr);
	131	extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
	132	const struct in6_addr *addr);
1da177e4	133	extern void ipv6_sock_mc_close(struct sock *sk);
a50feda5 ED	134	extern bool inet6_mc_check(struct sock *sk,
	135	const struct in6_addr *mc_addr,
	136	const struct in6_addr *src_addr);
1da177e4	137
9acd9f3a YH	138	extern int ipv6_dev_mc_inc(struct net_device dev, const struct in6_addr addr);
	139	extern int __ipv6_dev_mc_dec(struct inet6_dev idev, const struct in6_addr addr);
	140	extern int ipv6_dev_mc_dec(struct net_device dev, const struct in6_addr addr);
1da177e4 LT	141	extern void ipv6_mc_up(struct inet6_dev *idev);
1da177e4 LT	142	extern void ipv6_mc_down(struct inet6_dev *idev);
75c78500 MS	143	extern void ipv6_mc_unmap(struct inet6_dev *idev);
75c78500 MS	144	extern void ipv6_mc_remap(struct inet6_dev *idev);
1da177e4 LT	145	extern void ipv6_mc_init_dev(struct inet6_dev *idev);
	146	extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
	147	extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
	148
a50feda5 ED	149	extern bool ipv6_chk_mcast_addr(struct net_device *dev,
	150	const struct in6_addr *group,
	151	const struct in6_addr *src_addr);
	152	extern bool ipv6_is_mld(struct sk_buff *skb, int nexthdr);
1da177e4	153
e6bff995 NH	154	extern void addrconf_prefix_rcv(struct net_device *dev,
e6bff995 NH	155	u8 *opt, int len, bool sllao);
1da177e4	156
1da177e4 LT	157	/*
	158	* anycast prototypes (anycast.c)
	159	*/
b71d1d42 ED	160	extern int ipv6_sock_ac_join(struct sock sk,int ifindex, const struct in6_addr addr);
b71d1d42 ED	161	extern int ipv6_sock_ac_drop(struct sock sk,int ifindex, const struct in6_addr addr);
1da177e4	162	extern void ipv6_sock_ac_close(struct sock *sk);
1da177e4	163
b71d1d42 ED	164	extern int ipv6_dev_ac_inc(struct net_device dev, const struct in6_addr addr);
b71d1d42 ED	165	extern int __ipv6_dev_ac_dec(struct inet6_dev idev, const struct in6_addr addr);
a50feda5 ED	166	extern bool ipv6_chk_acast_addr(struct net net, struct net_device dev,
a50feda5 ED	167	const struct in6_addr *addr);
1da177e4 LT	168
	169
	170	/* Device notifier */
	171	extern int register_inet6addr_notifier(struct notifier_block *nb);
	172	extern int unregister_inet6addr_notifier(struct notifier_block *nb);
	173
48daa3bb ED	174	/**
	175	* __in6_dev_get - get inet6_dev pointer from netdevice
	176	* @dev: network device
	177	*
	178	* Caller must hold rcu_read_lock or RTNL, because this function
	179	* does not take a reference on the inet6_dev.
	180	*/
	181	static inline struct inet6_dev __in6_dev_get(const struct net_device dev)
1da177e4	182	{
48daa3bb	183	return rcu_dereference_rtnl(dev->ip6_ptr);
1da177e4 LT	184	}
1da177e4 LT	185
48daa3bb ED	186	/**
	187	* in6_dev_get - get inet6_dev pointer from netdevice
	188	* @dev: network device
	189	*
	190	* This version can be used in any context, and takes a reference
	191	* on the inet6_dev. Callers must use in6_dev_put() later to
	192	* release this reference.
	193	*/
	194	static inline struct inet6_dev in6_dev_get(const struct net_device dev)
1da177e4	195	{
48daa3bb ED	196	struct inet6_dev *idev;
48daa3bb ED	197
8814c4b5	198	rcu_read_lock();
48daa3bb	199	idev = rcu_dereference(dev->ip6_ptr);
1da177e4 LT	200	if (idev)
1da177e4 LT	201	atomic_inc(&idev->refcnt);
8814c4b5	202	rcu_read_unlock();
1da177e4 LT	203	return idev;
	204	}
	205
	206	extern void in6_dev_finish_destroy(struct inet6_dev *idev);
	207
48daa3bb	208	static inline void in6_dev_put(struct inet6_dev *idev)
1da177e4 LT	209	{
	210	if (atomic_dec_and_test(&idev->refcnt))
	211	in6_dev_finish_destroy(idev);
	212	}
	213
48daa3bb ED	214	static inline void __in6_dev_put(struct inet6_dev *idev)
	215	{
	216	atomic_dec(&idev->refcnt);
	217	}
1da177e4	218
48daa3bb ED	219	static inline void in6_dev_hold(struct inet6_dev *idev)
	220	{
	221	atomic_inc(&idev->refcnt);
	222	}
1da177e4 LT	223
	224	extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
	225
	226	static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
	227	{
	228	if (atomic_dec_and_test(&ifp->refcnt))
	229	inet6_ifa_finish_destroy(ifp);
	230	}
	231
48daa3bb ED	232	static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
	233	{
	234	atomic_dec(&ifp->refcnt);
	235	}
1da177e4	236
48daa3bb ED	237	static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
	238	{
	239	atomic_inc(&ifp->refcnt);
	240	}
1da177e4	241
1da177e4 LT	242
	243	/*
	244	* compute link-local solicited-node multicast address
	245	*/
	246
	247	static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
	248	struct in6_addr *solicited)
	249	{
	250	ipv6_addr_set(solicited,
0e7b8dcd YH	251	htonl(0xFF020000), 0,
	252	htonl(0x1),
	253	htonl(0xFF000000) \| addr->s6_addr32[3]);
1da177e4 LT	254	}
1da177e4 LT	255
1da177e4 LT	256	static inline int ipv6_addr_is_multicast(const struct in6_addr *addr)
1da177e4 LT	257	{
0e7b8dcd	258	return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000);
1da177e4 LT	259	}
	260
	261	static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
	262	{
48daa3bb	263	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
fed85383	264	addr->s6_addr32[1] \| addr->s6_addr32[2] \|
48daa3bb	265	(addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
1da177e4 LT	266	}
	267
	268	static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
	269	{
48daa3bb	270	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
fed85383	271	addr->s6_addr32[1] \| addr->s6_addr32[2] \|
48daa3bb	272	(addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
1da177e4 LT	273	}
1da177e4 LT	274
c7dc89c0 FT	275	static inline int ipv6_addr_is_isatap(const struct in6_addr *addr)
c7dc89c0 FT	276	{
48daa3bb	277	return (addr->s6_addr32[2] \| htonl(0x02000000)) == htonl(0x02005EFE);
c7dc89c0 FT	278	}
c7dc89c0 FT	279
20380731 ACM	280	#ifdef CONFIG_PROC_FS
	281	extern int if6_proc_init(void);
	282	extern void if6_proc_exit(void);
	283	#endif
	284
1da177e4	285	#endif