[deliverable/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			(5)
#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;
};


#ifdef __KERNEL__

#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,
					      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,
						   struct in6_addr *addr);
#endif

extern int			ipv6_chk_prefix(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,
					struct in6_addr *addr);
extern void			addrconf_leave_solict(struct inet6_dev *idev,
					struct in6_addr *addr);

static inline unsigned long addrconf_timeout_fixup(u32 timeout,
						    unsigned 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 int 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 int ipv6_chk_mcast_addr(struct net_device *dev,
			       const struct in6_addr *group,
			       const struct in6_addr *src_addr);
extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr);

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

/*
 *	anycast prototypes (anycast.c)
 */
extern int ipv6_sock_ac_join(struct sock *sk,int ifindex,struct in6_addr *addr);
extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex,struct in6_addr *addr);
extern void ipv6_sock_ac_close(struct sock *sk);
extern int inet6_ac_check(struct sock *sk, struct in6_addr *addr, int ifindex);

extern int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr);
extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr);
extern int ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
			       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
#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)
	11	#define REGEN_MAX_RETRY (5)
	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
	45	#ifdef __KERNEL__
	46
1da177e4 LT	47	#include <linux/netdevice.h>
1da177e4 LT	48	#include <net/if_inet6.h>
e4553edd	49	#include <net/ipv6.h>
1da177e4 LT	50
	51	#define IN6_ADDR_HSIZE 16
	52
	53	extern int addrconf_init(void);
	54	extern void addrconf_cleanup(void);
	55
af284937 DL	56	extern int addrconf_add_ifaddr(struct net *net,
	57	void __user *arg);
	58	extern int addrconf_del_ifaddr(struct net *net,
	59	void __user *arg);
	60	extern int addrconf_set_dstaddr(struct net *net,
	61	void __user *arg);
1da177e4	62
bfeade08 DL	63	extern int ipv6_chk_addr(struct net *net,
bfeade08 DL	64	struct in6_addr *addr,
1da177e4 LT	65	struct net_device *dev,
1da177e4 LT	66	int strict);
bfeade08	67
59fbb3a6	68	#if defined(CONFIG_IPV6_MIP6) \|\| defined(CONFIG_IPV6_MIP6_MODULE)
389f6612 DL	69	extern int ipv6_chk_home_addr(struct net *net,
389f6612 DL	70	struct in6_addr *addr);
65d4ed92	71	#endif
52eeeb84 YH	72
	73	extern int ipv6_chk_prefix(struct in6_addr *addr,
	74	struct net_device *dev);
	75
1cab3da6	76	extern struct inet6_ifaddr ipv6_get_ifaddr(struct net net,
9acd9f3a	77	const struct in6_addr *addr,
1cab3da6 DL	78	struct net_device *dev,
	79	int strict);
	80
191cd582 BH	81	extern int ipv6_dev_get_saddr(struct net *net,
191cd582 BH	82	struct net_device *dev,
9acd9f3a	83	const struct in6_addr *daddr,
7cbca67c	84	unsigned int srcprefs,
1da177e4	85	struct in6_addr *saddr);
95c385b4 NH	86	extern int ipv6_get_lladdr(struct net_device *dev,
	87	struct in6_addr *addr,
	88	unsigned char banned_flags);
b2f5e7cd VY	89	extern int ipv6_rcv_saddr_equal(const struct sock *sk,
b2f5e7cd VY	90	const struct sock *sk2);
1da177e4 LT	91	extern void addrconf_join_solict(struct net_device *dev,
	92	struct in6_addr *addr);
	93	extern void addrconf_leave_solict(struct inet6_dev *idev,
	94	struct in6_addr *addr);
	95
4bed72e4 YH	96	static inline unsigned long addrconf_timeout_fixup(u32 timeout,
	97	unsigned unit)
	98	{
	99	if (timeout == 0xffffffff)
	100	return ~0UL;
	101
	102	/*
	103	* Avoid arithmetic overflow.
	104	* Assuming unit is constant and non-zero, this "if" statement
	105	* will go away on 64bit archs.
	106	*/
	107	if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
	108	return LONG_MAX / unit;
	109
	110	return timeout;
	111	}
	112
	113	static inline int addrconf_finite_timeout(unsigned long timeout)
	114	{
	115	return ~timeout;
	116	}
	117
2a8cc6c8 YH	118	/*
	119	* IPv6 Address Label subsystem (addrlabel.c)
	120	*/
	121	extern int ipv6_addr_label_init(void);
2cc6d2bf	122	extern void ipv6_addr_label_cleanup(void);
2a8cc6c8	123	extern void ipv6_addr_label_rtnl_register(void);
3de23255 BT	124	extern u32 ipv6_addr_label(struct net *net,
3de23255 BT	125	const struct in6_addr *addr,
2a8cc6c8 YH	126	int type, int ifindex);
2a8cc6c8 YH	127
1da177e4 LT	128	/*
	129	* multicast prototypes (mcast.c)
	130	*/
9acd9f3a YH	131	extern int ipv6_sock_mc_join(struct sock *sk, int ifindex,
	132	const struct in6_addr *addr);
	133	extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
	134	const struct in6_addr *addr);
1da177e4	135	extern void ipv6_sock_mc_close(struct sock *sk);
9acd9f3a YH	136	extern int inet6_mc_check(struct sock *sk,
	137	const struct in6_addr *mc_addr,
	138	const struct in6_addr *src_addr);
1da177e4	139
9acd9f3a YH	140	extern int ipv6_dev_mc_inc(struct net_device dev, const struct in6_addr addr);
	141	extern int __ipv6_dev_mc_dec(struct inet6_dev idev, const struct in6_addr addr);
	142	extern int ipv6_dev_mc_dec(struct net_device dev, const struct in6_addr addr);
1da177e4 LT	143	extern void ipv6_mc_up(struct inet6_dev *idev);
1da177e4 LT	144	extern void ipv6_mc_down(struct inet6_dev *idev);
75c78500 MS	145	extern void ipv6_mc_unmap(struct inet6_dev *idev);
75c78500 MS	146	extern void ipv6_mc_remap(struct inet6_dev *idev);
1da177e4 LT	147	extern void ipv6_mc_init_dev(struct inet6_dev *idev);
	148	extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
	149	extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
	150
9acd9f3a YH	151	extern int ipv6_chk_mcast_addr(struct net_device *dev,
	152	const struct in6_addr *group,
	153	const struct in6_addr *src_addr);
1da177e4 LT	154	extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr);
	155
	156	extern void addrconf_prefix_rcv(struct net_device dev, u8 opt, int len);
	157
1da177e4 LT	158	/*
	159	* anycast prototypes (anycast.c)
	160	*/
	161	extern int ipv6_sock_ac_join(struct sock sk,int ifindex,struct in6_addr addr);
	162	extern int ipv6_sock_ac_drop(struct sock sk,int ifindex,struct in6_addr addr);
	163	extern void ipv6_sock_ac_close(struct sock *sk);
	164	extern int inet6_ac_check(struct sock sk, struct in6_addr addr, int ifindex);
	165
	166	extern int ipv6_dev_ac_inc(struct net_device dev, struct in6_addr addr);
	167	extern int __ipv6_dev_ac_dec(struct inet6_dev idev, struct in6_addr addr);
6ab57e7e DL	168	extern int ipv6_chk_acast_addr(struct net net, struct net_device dev,
6ab57e7e DL	169	struct in6_addr *addr);
1da177e4 LT	170
	171
	172	/* Device notifier */
	173	extern int register_inet6addr_notifier(struct notifier_block *nb);
	174	extern int unregister_inet6addr_notifier(struct notifier_block *nb);
	175
48daa3bb ED	176	/**
	177	* __in6_dev_get - get inet6_dev pointer from netdevice
	178	* @dev: network device
	179	*
	180	* Caller must hold rcu_read_lock or RTNL, because this function
	181	* does not take a reference on the inet6_dev.
	182	*/
	183	static inline struct inet6_dev __in6_dev_get(const struct net_device dev)
1da177e4	184	{
48daa3bb	185	return rcu_dereference_rtnl(dev->ip6_ptr);
1da177e4 LT	186	}
1da177e4 LT	187
48daa3bb ED	188	/**
	189	* in6_dev_get - get inet6_dev pointer from netdevice
	190	* @dev: network device
	191	*
	192	* This version can be used in any context, and takes a reference
	193	* on the inet6_dev. Callers must use in6_dev_put() later to
	194	* release this reference.
	195	*/
	196	static inline struct inet6_dev in6_dev_get(const struct net_device dev)
1da177e4	197	{
48daa3bb ED	198	struct inet6_dev *idev;
48daa3bb ED	199
8814c4b5	200	rcu_read_lock();
48daa3bb	201	idev = rcu_dereference(dev->ip6_ptr);
1da177e4 LT	202	if (idev)
1da177e4 LT	203	atomic_inc(&idev->refcnt);
8814c4b5	204	rcu_read_unlock();
1da177e4 LT	205	return idev;
	206	}
	207
	208	extern void in6_dev_finish_destroy(struct inet6_dev *idev);
	209
48daa3bb	210	static inline void in6_dev_put(struct inet6_dev *idev)
1da177e4 LT	211	{
	212	if (atomic_dec_and_test(&idev->refcnt))
	213	in6_dev_finish_destroy(idev);
	214	}
	215
48daa3bb ED	216	static inline void __in6_dev_put(struct inet6_dev *idev)
	217	{
	218	atomic_dec(&idev->refcnt);
	219	}
1da177e4	220
48daa3bb ED	221	static inline void in6_dev_hold(struct inet6_dev *idev)
	222	{
	223	atomic_inc(&idev->refcnt);
	224	}
1da177e4 LT	225
	226	extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
	227
	228	static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
	229	{
	230	if (atomic_dec_and_test(&ifp->refcnt))
	231	inet6_ifa_finish_destroy(ifp);
	232	}
	233
48daa3bb ED	234	static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
	235	{
	236	atomic_dec(&ifp->refcnt);
	237	}
1da177e4	238
48daa3bb ED	239	static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
	240	{
	241	atomic_inc(&ifp->refcnt);
	242	}
1da177e4	243
1da177e4 LT	244
	245	/*
	246	* compute link-local solicited-node multicast address
	247	*/
	248
	249	static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
	250	struct in6_addr *solicited)
	251	{
	252	ipv6_addr_set(solicited,
0e7b8dcd YH	253	htonl(0xFF020000), 0,
	254	htonl(0x1),
	255	htonl(0xFF000000) \| addr->s6_addr32[3]);
1da177e4 LT	256	}
1da177e4 LT	257
1da177e4 LT	258	static inline int ipv6_addr_is_multicast(const struct in6_addr *addr)
1da177e4 LT	259	{
0e7b8dcd	260	return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000);
1da177e4 LT	261	}
	262
	263	static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
	264	{
48daa3bb	265	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
fed85383	266	addr->s6_addr32[1] \| addr->s6_addr32[2] \|
48daa3bb	267	(addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
1da177e4 LT	268	}
	269
	270	static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
	271	{
48daa3bb	272	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
fed85383	273	addr->s6_addr32[1] \| addr->s6_addr32[2] \|
48daa3bb	274	(addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
1da177e4 LT	275	}
1da177e4 LT	276
c7dc89c0 FT	277	static inline int ipv6_addr_is_isatap(const struct in6_addr *addr)
c7dc89c0 FT	278	{
48daa3bb	279	return (addr->s6_addr32[2] \| htonl(0x02000000)) == htonl(0x02005EFE);
c7dc89c0 FT	280	}
c7dc89c0 FT	281
20380731 ACM	282	#ifdef CONFIG_PROC_FS
	283	extern int if6_proc_init(void);
	284	extern void if6_proc_exit(void);
	285	#endif
	286
1da177e4 LT	287	#endif
1da177e4 LT	288	#endif