[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			(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_SHIFT	4
#define IN6_ADDR_HSIZE		(1 << IN6_ADDR_HSIZE_SHIFT)

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,
					       const 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);

extern void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
					 struct ipv6_devconf *devconf);

/**
 * __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	48
ddbe5032 ED	49	#define IN6_ADDR_HSIZE_SHIFT 4
ddbe5032 ED	50	#define IN6_ADDR_HSIZE (1 << IN6_ADDR_HSIZE_SHIFT)
1da177e4 LT	51
	52	extern int addrconf_init(void);
	53	extern void addrconf_cleanup(void);
	54
af284937 DL	55	extern int addrconf_add_ifaddr(struct net *net,
	56	void __user *arg);
	57	extern int addrconf_del_ifaddr(struct net *net,
	58	void __user *arg);
	59	extern int addrconf_set_dstaddr(struct net *net,
	60	void __user *arg);
1da177e4	61
bfeade08	62	extern int ipv6_chk_addr(struct net *net,
b71d1d42	63	const struct in6_addr *addr,
1da177e4 LT	64	struct net_device *dev,
1da177e4 LT	65	int strict);
bfeade08	66
59fbb3a6	67	#if defined(CONFIG_IPV6_MIP6) \|\| defined(CONFIG_IPV6_MIP6_MODULE)
389f6612	68	extern int ipv6_chk_home_addr(struct net *net,
b71d1d42	69	const struct in6_addr *addr);
65d4ed92	70	#endif
52eeeb84	71
b71d1d42	72	extern int ipv6_chk_prefix(const struct in6_addr *addr,
52eeeb84 YH	73	struct net_device *dev);
52eeeb84 YH	74
1cab3da6	75	extern struct inet6_ifaddr ipv6_get_ifaddr(struct net net,
9acd9f3a	76	const struct in6_addr *addr,
1cab3da6 DL	77	struct net_device *dev,
	78	int strict);
	79
191cd582	80	extern int ipv6_dev_get_saddr(struct net *net,
b3f644fc	81	const struct net_device *dev,
9acd9f3a	82	const struct in6_addr *daddr,
7cbca67c	83	unsigned int srcprefs,
1da177e4	84	struct in6_addr *saddr);
95c385b4 NH	85	extern int ipv6_get_lladdr(struct net_device *dev,
	86	struct in6_addr *addr,
	87	unsigned char banned_flags);
b2f5e7cd VY	88	extern int ipv6_rcv_saddr_equal(const struct sock *sk,
b2f5e7cd VY	89	const struct sock *sk2);
1da177e4	90	extern void addrconf_join_solict(struct net_device *dev,
b71d1d42	91	const struct in6_addr *addr);
1da177e4	92	extern void addrconf_leave_solict(struct inet6_dev *idev,
b71d1d42	93	const struct in6_addr *addr);
1da177e4	94
4bed72e4	95	static inline unsigned long addrconf_timeout_fixup(u32 timeout,
95c96174	96	unsigned int unit)
4bed72e4 YH	97	{
	98	if (timeout == 0xffffffff)
	99	return ~0UL;
	100
	101	/*
	102	* Avoid arithmetic overflow.
	103	* Assuming unit is constant and non-zero, this "if" statement
	104	* will go away on 64bit archs.
	105	*/
	106	if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
	107	return LONG_MAX / unit;
	108
	109	return timeout;
	110	}
	111
	112	static inline int addrconf_finite_timeout(unsigned long timeout)
	113	{
	114	return ~timeout;
	115	}
	116
2a8cc6c8 YH	117	/*
	118	* IPv6 Address Label subsystem (addrlabel.c)
	119	*/
	120	extern int ipv6_addr_label_init(void);
2cc6d2bf	121	extern void ipv6_addr_label_cleanup(void);
2a8cc6c8	122	extern void ipv6_addr_label_rtnl_register(void);
3de23255 BT	123	extern u32 ipv6_addr_label(struct net *net,
3de23255 BT	124	const struct in6_addr *addr,
2a8cc6c8 YH	125	int type, int ifindex);
2a8cc6c8 YH	126
1da177e4 LT	127	/*
	128	* multicast prototypes (mcast.c)
	129	*/
9acd9f3a YH	130	extern int ipv6_sock_mc_join(struct sock *sk, int ifindex,
	131	const struct in6_addr *addr);
	132	extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
	133	const struct in6_addr *addr);
1da177e4	134	extern void ipv6_sock_mc_close(struct sock *sk);
a50feda5 ED	135	extern bool inet6_mc_check(struct sock *sk,
	136	const struct in6_addr *mc_addr,
	137	const struct in6_addr *src_addr);
1da177e4	138
9acd9f3a YH	139	extern int ipv6_dev_mc_inc(struct net_device dev, const struct in6_addr addr);
	140	extern int __ipv6_dev_mc_dec(struct inet6_dev idev, const struct in6_addr addr);
	141	extern int ipv6_dev_mc_dec(struct net_device dev, const struct in6_addr addr);
1da177e4 LT	142	extern void ipv6_mc_up(struct inet6_dev *idev);
1da177e4 LT	143	extern void ipv6_mc_down(struct inet6_dev *idev);
75c78500 MS	144	extern void ipv6_mc_unmap(struct inet6_dev *idev);
75c78500 MS	145	extern void ipv6_mc_remap(struct inet6_dev *idev);
1da177e4 LT	146	extern void ipv6_mc_init_dev(struct inet6_dev *idev);
	147	extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
	148	extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
	149
a50feda5 ED	150	extern bool ipv6_chk_mcast_addr(struct net_device *dev,
	151	const struct in6_addr *group,
	152	const struct in6_addr *src_addr);
	153	extern bool ipv6_is_mld(struct sk_buff *skb, int nexthdr);
1da177e4	154
e6bff995 NH	155	extern void addrconf_prefix_rcv(struct net_device *dev,
e6bff995 NH	156	u8 *opt, int len, bool sllao);
1da177e4	157
1da177e4 LT	158	/*
	159	* anycast prototypes (anycast.c)
	160	*/
b71d1d42 ED	161	extern int ipv6_sock_ac_join(struct sock sk,int ifindex, const struct in6_addr addr);
b71d1d42 ED	162	extern int ipv6_sock_ac_drop(struct sock sk,int ifindex, const struct in6_addr addr);
1da177e4	163	extern void ipv6_sock_ac_close(struct sock *sk);
1da177e4	164
b71d1d42 ED	165	extern int ipv6_dev_ac_inc(struct net_device dev, const struct in6_addr addr);
b71d1d42 ED	166	extern int __ipv6_dev_ac_dec(struct inet6_dev idev, const struct in6_addr addr);
a50feda5 ED	167	extern bool ipv6_chk_acast_addr(struct net net, struct net_device dev,
a50feda5 ED	168	const struct in6_addr *addr);
1da177e4 LT	169
	170
	171	/* Device notifier */
	172	extern int register_inet6addr_notifier(struct notifier_block *nb);
	173	extern int unregister_inet6addr_notifier(struct notifier_block *nb);
	174
d67b8c61 ND	175	extern void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
	176	struct ipv6_devconf *devconf);
	177
48daa3bb ED	178	/**
	179	* __in6_dev_get - get inet6_dev pointer from netdevice
	180	* @dev: network device
	181	*
	182	* Caller must hold rcu_read_lock or RTNL, because this function
	183	* does not take a reference on the inet6_dev.
	184	*/
	185	static inline struct inet6_dev __in6_dev_get(const struct net_device dev)
1da177e4	186	{
48daa3bb	187	return rcu_dereference_rtnl(dev->ip6_ptr);
1da177e4 LT	188	}
1da177e4 LT	189
48daa3bb ED	190	/**
	191	* in6_dev_get - get inet6_dev pointer from netdevice
	192	* @dev: network device
	193	*
	194	* This version can be used in any context, and takes a reference
	195	* on the inet6_dev. Callers must use in6_dev_put() later to
	196	* release this reference.
	197	*/
	198	static inline struct inet6_dev in6_dev_get(const struct net_device dev)
1da177e4	199	{
48daa3bb ED	200	struct inet6_dev *idev;
48daa3bb ED	201
8814c4b5	202	rcu_read_lock();
48daa3bb	203	idev = rcu_dereference(dev->ip6_ptr);
1da177e4 LT	204	if (idev)
1da177e4 LT	205	atomic_inc(&idev->refcnt);
8814c4b5	206	rcu_read_unlock();
1da177e4 LT	207	return idev;
	208	}
	209
	210	extern void in6_dev_finish_destroy(struct inet6_dev *idev);
	211
48daa3bb	212	static inline void in6_dev_put(struct inet6_dev *idev)
1da177e4 LT	213	{
	214	if (atomic_dec_and_test(&idev->refcnt))
	215	in6_dev_finish_destroy(idev);
	216	}
	217
48daa3bb ED	218	static inline void __in6_dev_put(struct inet6_dev *idev)
	219	{
	220	atomic_dec(&idev->refcnt);
	221	}
1da177e4	222
48daa3bb ED	223	static inline void in6_dev_hold(struct inet6_dev *idev)
	224	{
	225	atomic_inc(&idev->refcnt);
	226	}
1da177e4 LT	227
	228	extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
	229
	230	static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
	231	{
	232	if (atomic_dec_and_test(&ifp->refcnt))
	233	inet6_ifa_finish_destroy(ifp);
	234	}
	235
48daa3bb ED	236	static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
	237	{
	238	atomic_dec(&ifp->refcnt);
	239	}
1da177e4	240
48daa3bb ED	241	static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
	242	{
	243	atomic_inc(&ifp->refcnt);
	244	}
1da177e4	245
1da177e4 LT	246
	247	/*
	248	* compute link-local solicited-node multicast address
	249	*/
	250
	251	static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
	252	struct in6_addr *solicited)
	253	{
	254	ipv6_addr_set(solicited,
0e7b8dcd YH	255	htonl(0xFF020000), 0,
	256	htonl(0x1),
	257	htonl(0xFF000000) \| addr->s6_addr32[3]);
1da177e4 LT	258	}
1da177e4 LT	259
1da177e4 LT	260	static inline int ipv6_addr_is_multicast(const struct in6_addr *addr)
1da177e4 LT	261	{
0e7b8dcd	262	return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000);
1da177e4 LT	263	}
	264
	265	static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
	266	{
48daa3bb	267	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
fed85383	268	addr->s6_addr32[1] \| addr->s6_addr32[2] \|
48daa3bb	269	(addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
1da177e4 LT	270	}
	271
	272	static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
	273	{
48daa3bb	274	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
fed85383	275	addr->s6_addr32[1] \| addr->s6_addr32[2] \|
48daa3bb	276	(addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
1da177e4 LT	277	}
1da177e4 LT	278
c7dc89c0 FT	279	static inline int ipv6_addr_is_isatap(const struct in6_addr *addr)
c7dc89c0 FT	280	{
48daa3bb	281	return (addr->s6_addr32[2] \| htonl(0x02000000)) == htonl(0x02005EFE);
c7dc89c0 FT	282	}
c7dc89c0 FT	283
20380731 ACM	284	#ifdef CONFIG_PROC_FS
	285	extern int if6_proc_init(void);
	286	extern void if6_proc_exit(void);
	287	#endif
	288
1da177e4	289	#endif