[linux-2.6-block.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

#define ADDRCONF_TIMER_FUZZ_MINUS	(HZ > 50 ? HZ / 50 : 1)
#define ADDRCONF_TIMER_FUZZ		(HZ / 4)
#define ADDRCONF_TIMER_FUZZ_MAX		(HZ)

#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);

/*
 * identify MLD packets for MLD filter exceptions
 */
static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
{
	struct icmp6hdr *hdr;

	if (nexthdr != IPPROTO_ICMPV6 ||
	    !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
		return false;

	hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);

	switch (hdr->icmp6_type) {
	case ICMPV6_MGM_QUERY:
	case ICMPV6_MGM_REPORT:
	case ICMPV6_MGM_REDUCTION:
	case ICMPV6_MLD2_REPORT:
		return true;
	default:
		break;
	}
	return false;
}

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 int inet6addr_notifier_call_chain(unsigned long val, void *v);

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

static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
{
#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
	__u64 *p = (__u64 *)addr;
	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL;
#else
	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
		addr->s6_addr32[1] | addr->s6_addr32[2] |
		(addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
#endif
}

static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
{
#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
	__u64 *p = (__u64 *)addr;
	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL;
#else
	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
		addr->s6_addr32[1] | addr->s6_addr32[2] |
		(addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
#endif
}

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

static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
{
#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
	__u64 *p = (__u64 *)addr;
	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) |
		((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) &
		 cpu_to_be64(0xffffffffff000000UL))) == 0UL;
#else
	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
		addr->s6_addr32[1] |
		(addr->s6_addr32[2] ^ htonl(0x00000001)) |
		(addr->s6_addr[12] ^ 0xff)) == 0;
#endif
}

#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
5c766d64 JP	18	#define ADDRCONF_TIMER_FUZZ_MINUS (HZ > 50 ? HZ / 50 : 1)
	19	#define ADDRCONF_TIMER_FUZZ (HZ / 4)
	20	#define ADDRCONF_TIMER_FUZZ_MAX (HZ)
	21
c7dc89c0	22	#include <linux/in.h>
6a800d45 PM	23	#include <linux/in6.h>
6a800d45 PM	24
1da177e4 LT	25	struct prefix_info {
	26	__u8 type;
	27	__u8 length;
	28	__u8 prefix_len;
	29
	30	#if defined(__BIG_ENDIAN_BITFIELD)
	31	__u8 onlink : 1,
	32	autoconf : 1,
	33	reserved : 6;
	34	#elif defined(__LITTLE_ENDIAN_BITFIELD)
	35	__u8 reserved : 6,
	36	autoconf : 1,
	37	onlink : 1;
	38	#else
	39	#error "Please fix <asm/byteorder.h>"
	40	#endif
e69a4adc AV	41	__be32 valid;
	42	__be32 prefered;
	43	__be32 reserved2;
1da177e4 LT	44
	45	struct in6_addr prefix;
	46	};
	47
	48
1da177e4 LT	49	#include <linux/netdevice.h>
1da177e4 LT	50	#include <net/if_inet6.h>
e4553edd	51	#include <net/ipv6.h>
1da177e4	52
ddbe5032 ED	53	#define IN6_ADDR_HSIZE_SHIFT 4
ddbe5032 ED	54	#define IN6_ADDR_HSIZE (1 << IN6_ADDR_HSIZE_SHIFT)
1da177e4 LT	55
	56	extern int addrconf_init(void);
	57	extern void addrconf_cleanup(void);
	58
af284937 DL	59	extern int addrconf_add_ifaddr(struct net *net,
	60	void __user *arg);
	61	extern int addrconf_del_ifaddr(struct net *net,
	62	void __user *arg);
	63	extern int addrconf_set_dstaddr(struct net *net,
	64	void __user *arg);
1da177e4	65
bfeade08	66	extern int ipv6_chk_addr(struct net *net,
b71d1d42	67	const struct in6_addr *addr,
1da177e4 LT	68	struct net_device *dev,
1da177e4 LT	69	int strict);
bfeade08	70
59fbb3a6	71	#if defined(CONFIG_IPV6_MIP6) \|\| defined(CONFIG_IPV6_MIP6_MODULE)
389f6612	72	extern int ipv6_chk_home_addr(struct net *net,
b71d1d42	73	const struct in6_addr *addr);
65d4ed92	74	#endif
52eeeb84	75
b71d1d42	76	extern int ipv6_chk_prefix(const struct in6_addr *addr,
52eeeb84 YH	77	struct net_device *dev);
52eeeb84 YH	78
1cab3da6	79	extern struct inet6_ifaddr ipv6_get_ifaddr(struct net net,
9acd9f3a	80	const struct in6_addr *addr,
1cab3da6 DL	81	struct net_device *dev,
	82	int strict);
	83
191cd582	84	extern int ipv6_dev_get_saddr(struct net *net,
b3f644fc	85	const struct net_device *dev,
9acd9f3a	86	const struct in6_addr *daddr,
7cbca67c	87	unsigned int srcprefs,
1da177e4	88	struct in6_addr *saddr);
95c385b4 NH	89	extern int ipv6_get_lladdr(struct net_device *dev,
	90	struct in6_addr *addr,
	91	unsigned char banned_flags);
b2f5e7cd VY	92	extern int ipv6_rcv_saddr_equal(const struct sock *sk,
b2f5e7cd VY	93	const struct sock *sk2);
1da177e4	94	extern void addrconf_join_solict(struct net_device *dev,
b71d1d42	95	const struct in6_addr *addr);
1da177e4	96	extern void addrconf_leave_solict(struct inet6_dev *idev,
b71d1d42	97	const struct in6_addr *addr);
1da177e4	98
4bed72e4	99	static inline unsigned long addrconf_timeout_fixup(u32 timeout,
95c96174	100	unsigned int unit)
4bed72e4 YH	101	{
	102	if (timeout == 0xffffffff)
	103	return ~0UL;
	104
	105	/*
	106	* Avoid arithmetic overflow.
	107	* Assuming unit is constant and non-zero, this "if" statement
	108	* will go away on 64bit archs.
	109	*/
	110	if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
	111	return LONG_MAX / unit;
	112
	113	return timeout;
	114	}
	115
	116	static inline int addrconf_finite_timeout(unsigned long timeout)
	117	{
	118	return ~timeout;
	119	}
	120
2a8cc6c8 YH	121	/*
	122	* IPv6 Address Label subsystem (addrlabel.c)
	123	*/
	124	extern int ipv6_addr_label_init(void);
2cc6d2bf	125	extern void ipv6_addr_label_cleanup(void);
2a8cc6c8	126	extern void ipv6_addr_label_rtnl_register(void);
3de23255 BT	127	extern u32 ipv6_addr_label(struct net *net,
3de23255 BT	128	const struct in6_addr *addr,
2a8cc6c8 YH	129	int type, int ifindex);
2a8cc6c8 YH	130
1da177e4 LT	131	/*
	132	* multicast prototypes (mcast.c)
	133	*/
9acd9f3a YH	134	extern int ipv6_sock_mc_join(struct sock *sk, int ifindex,
	135	const struct in6_addr *addr);
	136	extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
	137	const struct in6_addr *addr);
1da177e4	138	extern void ipv6_sock_mc_close(struct sock *sk);
a50feda5 ED	139	extern bool inet6_mc_check(struct sock *sk,
	140	const struct in6_addr *mc_addr,
	141	const struct in6_addr *src_addr);
1da177e4	142
9acd9f3a YH	143	extern int ipv6_dev_mc_inc(struct net_device dev, const struct in6_addr addr);
	144	extern int __ipv6_dev_mc_dec(struct inet6_dev idev, const struct in6_addr addr);
	145	extern int ipv6_dev_mc_dec(struct net_device dev, const struct in6_addr addr);
1da177e4 LT	146	extern void ipv6_mc_up(struct inet6_dev *idev);
1da177e4 LT	147	extern void ipv6_mc_down(struct inet6_dev *idev);
75c78500 MS	148	extern void ipv6_mc_unmap(struct inet6_dev *idev);
75c78500 MS	149	extern void ipv6_mc_remap(struct inet6_dev *idev);
1da177e4 LT	150	extern void ipv6_mc_init_dev(struct inet6_dev *idev);
	151	extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
	152	extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
	153
a50feda5 ED	154	extern bool ipv6_chk_mcast_addr(struct net_device *dev,
	155	const struct in6_addr *group,
	156	const struct in6_addr *src_addr);
daad1512 YH	157
	158	/*
	159	* identify MLD packets for MLD filter exceptions
	160	*/
	161	static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
	162	{
	163	struct icmp6hdr *hdr;
	164
	165	if (nexthdr != IPPROTO_ICMPV6 \|\|
	166	!pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
	167	return false;
	168
	169	hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);
	170
	171	switch (hdr->icmp6_type) {
	172	case ICMPV6_MGM_QUERY:
	173	case ICMPV6_MGM_REPORT:
	174	case ICMPV6_MGM_REDUCTION:
	175	case ICMPV6_MLD2_REPORT:
	176	return true;
	177	default:
	178	break;
	179	}
	180	return false;
	181	}
1da177e4	182
e6bff995 NH	183	extern void addrconf_prefix_rcv(struct net_device *dev,
e6bff995 NH	184	u8 *opt, int len, bool sllao);
1da177e4	185
1da177e4 LT	186	/*
	187	* anycast prototypes (anycast.c)
	188	*/
b71d1d42 ED	189	extern int ipv6_sock_ac_join(struct sock sk,int ifindex, const struct in6_addr addr);
b71d1d42 ED	190	extern int ipv6_sock_ac_drop(struct sock sk,int ifindex, const struct in6_addr addr);
1da177e4	191	extern void ipv6_sock_ac_close(struct sock *sk);
1da177e4	192
b71d1d42 ED	193	extern int ipv6_dev_ac_inc(struct net_device dev, const struct in6_addr addr);
b71d1d42 ED	194	extern int __ipv6_dev_ac_dec(struct inet6_dev idev, const struct in6_addr addr);
a50feda5 ED	195	extern bool ipv6_chk_acast_addr(struct net net, struct net_device dev,
a50feda5 ED	196	const struct in6_addr *addr);
1da177e4 LT	197
	198
	199	/* Device notifier */
	200	extern int register_inet6addr_notifier(struct notifier_block *nb);
	201	extern int unregister_inet6addr_notifier(struct notifier_block *nb);
f88c91dd	202	extern int inet6addr_notifier_call_chain(unsigned long val, void *v);
1da177e4	203
d67b8c61 ND	204	extern void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
	205	struct ipv6_devconf *devconf);
	206
48daa3bb ED	207	/**
	208	* __in6_dev_get - get inet6_dev pointer from netdevice
	209	* @dev: network device
	210	*
	211	* Caller must hold rcu_read_lock or RTNL, because this function
	212	* does not take a reference on the inet6_dev.
	213	*/
	214	static inline struct inet6_dev __in6_dev_get(const struct net_device dev)
1da177e4	215	{
48daa3bb	216	return rcu_dereference_rtnl(dev->ip6_ptr);
1da177e4 LT	217	}
1da177e4 LT	218
48daa3bb ED	219	/**
	220	* in6_dev_get - get inet6_dev pointer from netdevice
	221	* @dev: network device
	222	*
	223	* This version can be used in any context, and takes a reference
	224	* on the inet6_dev. Callers must use in6_dev_put() later to
	225	* release this reference.
	226	*/
	227	static inline struct inet6_dev in6_dev_get(const struct net_device dev)
1da177e4	228	{
48daa3bb ED	229	struct inet6_dev *idev;
48daa3bb ED	230
8814c4b5	231	rcu_read_lock();
48daa3bb	232	idev = rcu_dereference(dev->ip6_ptr);
1da177e4 LT	233	if (idev)
1da177e4 LT	234	atomic_inc(&idev->refcnt);
8814c4b5	235	rcu_read_unlock();
1da177e4 LT	236	return idev;
	237	}
	238
	239	extern void in6_dev_finish_destroy(struct inet6_dev *idev);
	240
48daa3bb	241	static inline void in6_dev_put(struct inet6_dev *idev)
1da177e4 LT	242	{
	243	if (atomic_dec_and_test(&idev->refcnt))
	244	in6_dev_finish_destroy(idev);
	245	}
	246
48daa3bb ED	247	static inline void __in6_dev_put(struct inet6_dev *idev)
	248	{
	249	atomic_dec(&idev->refcnt);
	250	}
1da177e4	251
48daa3bb ED	252	static inline void in6_dev_hold(struct inet6_dev *idev)
	253	{
	254	atomic_inc(&idev->refcnt);
	255	}
1da177e4 LT	256
	257	extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
	258
	259	static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
	260	{
	261	if (atomic_dec_and_test(&ifp->refcnt))
	262	inet6_ifa_finish_destroy(ifp);
	263	}
	264
48daa3bb ED	265	static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
	266	{
	267	atomic_dec(&ifp->refcnt);
	268	}
1da177e4	269
48daa3bb ED	270	static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
	271	{
	272	atomic_inc(&ifp->refcnt);
	273	}
1da177e4	274
1da177e4 LT	275
	276	/*
	277	* compute link-local solicited-node multicast address
	278	*/
	279
	280	static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
	281	struct in6_addr *solicited)
	282	{
	283	ipv6_addr_set(solicited,
0e7b8dcd YH	284	htonl(0xFF020000), 0,
	285	htonl(0x1),
	286	htonl(0xFF000000) \| addr->s6_addr32[3]);
1da177e4 LT	287	}
1da177e4 LT	288
b27b28cb	289	static inline bool ipv6_addr_is_multicast(const struct in6_addr *addr)
1da177e4	290	{
0e7b8dcd	291	return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000);
1da177e4 LT	292	}
1da177e4 LT	293
b27b28cb	294	static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
1da177e4	295	{
d1641565 YH	296	#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
	297	__u64 p = (__u64 )addr;
	298	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) \| (p[1] ^ cpu_to_be64(1))) == 0UL;
	299	#else
48daa3bb	300	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
fed85383	301	addr->s6_addr32[1] \| addr->s6_addr32[2] \|
48daa3bb	302	(addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
d1641565	303	#endif
1da177e4 LT	304	}
1da177e4 LT	305
b27b28cb	306	static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
1da177e4	307	{
d1641565 YH	308	#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
	309	__u64 p = (__u64 )addr;
	310	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) \| (p[1] ^ cpu_to_be64(2))) == 0UL;
	311	#else
48daa3bb	312	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
fed85383	313	addr->s6_addr32[1] \| addr->s6_addr32[2] \|
48daa3bb	314	(addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
d1641565	315	#endif
1da177e4 LT	316	}
1da177e4 LT	317
b27b28cb	318	static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
c7dc89c0	319	{
48daa3bb	320	return (addr->s6_addr32[2] \| htonl(0x02000000)) == htonl(0x02005EFE);
c7dc89c0 FT	321	}
c7dc89c0 FT	322
ca97a644 YH	323	static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
ca97a644 YH	324	{
9d100774 YH	325	#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
	326	__u64 p = (__u64 )addr;
	327	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) \|
	328	((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) &
	329	cpu_to_be64(0xffffffffff000000UL))) == 0UL;
	330	#else
	331	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
	332	addr->s6_addr32[1] \|
	333	(addr->s6_addr32[2] ^ htonl(0x00000001)) \|
	334	(addr->s6_addr[12] ^ 0xff)) == 0;
	335	#endif
ca97a644 YH	336	}
ca97a644 YH	337
20380731 ACM	338	#ifdef CONFIG_PROC_FS
	339	extern int if6_proc_init(void);
	340	extern void if6_proc_exit(void);
	341	#endif
	342
1da177e4	343	#endif