[mirror_ubuntu-zesty-kernel.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)

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

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

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

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

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

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

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);
int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr,
		      unsigned char banned_flags);
int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
		    unsigned char banned_flags);
int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2);
void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr);
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)
 */
int ipv6_addr_label_init(void);
void ipv6_addr_label_cleanup(void);
void ipv6_addr_label_rtnl_register(void);
u32 ipv6_addr_label(struct net *net, const struct in6_addr *addr,
		    int type, int ifindex);

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

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

bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group,
			 const struct in6_addr *src_addr);

void ipv6_mc_dad_complete(struct inet6_dev *idev);
/*
 * 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;
}

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

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

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


/* Device notifier */
int register_inet6addr_notifier(struct notifier_block *nb);
int unregister_inet6addr_notifier(struct notifier_block *nb);
int inet6addr_notifier_call_chain(unsigned long val, void *v);

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;
}

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);
}

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
int if6_proc_init(void);
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	55
e8e54d3c JP	56	int addrconf_init(void);
e8e54d3c JP	57	void addrconf_cleanup(void);
1da177e4	58
e8e54d3c JP	59	int addrconf_add_ifaddr(struct net net, void __user arg);
	60	int addrconf_del_ifaddr(struct net net, void __user arg);
	61	int addrconf_set_dstaddr(struct net net, void __user arg);
1da177e4	62
e8e54d3c JP	63	int ipv6_chk_addr(struct net net, const struct in6_addr addr,
e8e54d3c JP	64	const struct net_device *dev, int strict);
bfeade08	65
59fbb3a6	66	#if defined(CONFIG_IPV6_MIP6) \|\| defined(CONFIG_IPV6_MIP6_MODULE)
e8e54d3c	67	int ipv6_chk_home_addr(struct net net, const struct in6_addr addr);
65d4ed92	68	#endif
52eeeb84	69
e8e54d3c JP	70	int ipv6_chk_prefix(const struct in6_addr addr, struct net_device dev);
	71
	72	struct inet6_ifaddr ipv6_get_ifaddr(struct net net,
	73	const struct in6_addr *addr,
	74	struct net_device *dev, int strict);
	75
	76	int ipv6_dev_get_saddr(struct net net, const struct net_device dev,
	77	const struct in6_addr *daddr, unsigned int srcprefs,
	78	struct in6_addr *saddr);
	79	int __ipv6_get_lladdr(struct inet6_dev idev, struct in6_addr addr,
	80	unsigned char banned_flags);
	81	int ipv6_get_lladdr(struct net_device dev, struct in6_addr addr,
	82	unsigned char banned_flags);
	83	int ipv6_rcv_saddr_equal(const struct sock sk, const struct sock sk2);
	84	void addrconf_join_solict(struct net_device dev, const struct in6_addr addr);
	85	void addrconf_leave_solict(struct inet6_dev idev, const struct in6_addr addr);
1da177e4	86
4bed72e4	87	static inline unsigned long addrconf_timeout_fixup(u32 timeout,
95c96174	88	unsigned int unit)
4bed72e4 YH	89	{
	90	if (timeout == 0xffffffff)
	91	return ~0UL;
	92
	93	/*
	94	* Avoid arithmetic overflow.
	95	* Assuming unit is constant and non-zero, this "if" statement
	96	* will go away on 64bit archs.
	97	*/
	98	if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
	99	return LONG_MAX / unit;
	100
	101	return timeout;
	102	}
	103
	104	static inline int addrconf_finite_timeout(unsigned long timeout)
	105	{
	106	return ~timeout;
	107	}
	108
2a8cc6c8 YH	109	/*
	110	* IPv6 Address Label subsystem (addrlabel.c)
	111	*/
e8e54d3c JP	112	int ipv6_addr_label_init(void);
	113	void ipv6_addr_label_cleanup(void);
	114	void ipv6_addr_label_rtnl_register(void);
	115	u32 ipv6_addr_label(struct net net, const struct in6_addr addr,
	116	int type, int ifindex);
2a8cc6c8	117
1da177e4 LT	118	/*
	119	* multicast prototypes (mcast.c)
	120	*/
e8e54d3c JP	121	int ipv6_sock_mc_join(struct sock *sk, int ifindex,
	122	const struct in6_addr *addr);
	123	int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
	124	const struct in6_addr *addr);
	125	void ipv6_sock_mc_close(struct sock *sk);
	126	bool inet6_mc_check(struct sock sk, const struct in6_addr mc_addr,
	127	const struct in6_addr *src_addr);
	128
	129	int ipv6_dev_mc_inc(struct net_device dev, const struct in6_addr addr);
	130	int __ipv6_dev_mc_dec(struct inet6_dev idev, const struct in6_addr addr);
	131	int ipv6_dev_mc_dec(struct net_device dev, const struct in6_addr addr);
	132	void ipv6_mc_up(struct inet6_dev *idev);
	133	void ipv6_mc_down(struct inet6_dev *idev);
	134	void ipv6_mc_unmap(struct inet6_dev *idev);
	135	void ipv6_mc_remap(struct inet6_dev *idev);
	136	void ipv6_mc_init_dev(struct inet6_dev *idev);
	137	void ipv6_mc_destroy_dev(struct inet6_dev *idev);
	138	void addrconf_dad_failure(struct inet6_ifaddr *ifp);
	139
	140	bool ipv6_chk_mcast_addr(struct net_device dev, const struct in6_addr group,
	141	const struct in6_addr *src_addr);
	142
	143	void ipv6_mc_dad_complete(struct inet6_dev *idev);
daad1512 YH	144	/*
	145	* identify MLD packets for MLD filter exceptions
	146	*/
	147	static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
	148	{
	149	struct icmp6hdr *hdr;
	150
	151	if (nexthdr != IPPROTO_ICMPV6 \|\|
	152	!pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
	153	return false;
	154
	155	hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);
	156
	157	switch (hdr->icmp6_type) {
	158	case ICMPV6_MGM_QUERY:
	159	case ICMPV6_MGM_REPORT:
	160	case ICMPV6_MGM_REDUCTION:
	161	case ICMPV6_MLD2_REPORT:
	162	return true;
	163	default:
	164	break;
	165	}
	166	return false;
	167	}
1da177e4	168
e8e54d3c JP	169	void addrconf_prefix_rcv(struct net_device *dev,
e8e54d3c JP	170	u8 *opt, int len, bool sllao);
1da177e4	171
1da177e4 LT	172	/*
	173	* anycast prototypes (anycast.c)
	174	*/
e8e54d3c JP	175	int ipv6_sock_ac_join(struct sock *sk, int ifindex,
	176	const struct in6_addr *addr);
	177	int ipv6_sock_ac_drop(struct sock *sk, int ifindex,
	178	const struct in6_addr *addr);
	179	void ipv6_sock_ac_close(struct sock *sk);
	180
	181	int ipv6_dev_ac_inc(struct net_device dev, const struct in6_addr addr);
	182	int __ipv6_dev_ac_dec(struct inet6_dev idev, const struct in6_addr addr);
	183	bool ipv6_chk_acast_addr(struct net net, struct net_device dev,
a50feda5	184	const struct in6_addr *addr);
1da177e4 LT	185
	186
	187	/* Device notifier */
e8e54d3c JP	188	int register_inet6addr_notifier(struct notifier_block *nb);
	189	int unregister_inet6addr_notifier(struct notifier_block *nb);
	190	int inet6addr_notifier_call_chain(unsigned long val, void *v);
1da177e4	191
e8e54d3c JP	192	void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
e8e54d3c JP	193	struct ipv6_devconf *devconf);
d67b8c61	194
48daa3bb ED	195	/**
	196	* __in6_dev_get - get inet6_dev pointer from netdevice
	197	* @dev: network device
	198	*
	199	* Caller must hold rcu_read_lock or RTNL, because this function
	200	* does not take a reference on the inet6_dev.
	201	*/
	202	static inline struct inet6_dev __in6_dev_get(const struct net_device dev)
1da177e4	203	{
48daa3bb	204	return rcu_dereference_rtnl(dev->ip6_ptr);
1da177e4 LT	205	}
1da177e4 LT	206
48daa3bb ED	207	/**
	208	* in6_dev_get - get inet6_dev pointer from netdevice
	209	* @dev: network device
	210	*
	211	* This version can be used in any context, and takes a reference
	212	* on the inet6_dev. Callers must use in6_dev_put() later to
	213	* release this reference.
	214	*/
	215	static inline struct inet6_dev in6_dev_get(const struct net_device dev)
1da177e4	216	{
48daa3bb ED	217	struct inet6_dev *idev;
48daa3bb ED	218
8814c4b5	219	rcu_read_lock();
48daa3bb	220	idev = rcu_dereference(dev->ip6_ptr);
1da177e4 LT	221	if (idev)
1da177e4 LT	222	atomic_inc(&idev->refcnt);
8814c4b5	223	rcu_read_unlock();
1da177e4 LT	224	return idev;
	225	}
	226
e8e54d3c	227	void in6_dev_finish_destroy(struct inet6_dev *idev);
1da177e4	228
48daa3bb	229	static inline void in6_dev_put(struct inet6_dev *idev)
1da177e4 LT	230	{
	231	if (atomic_dec_and_test(&idev->refcnt))
	232	in6_dev_finish_destroy(idev);
	233	}
	234
48daa3bb ED	235	static inline void __in6_dev_put(struct inet6_dev *idev)
	236	{
	237	atomic_dec(&idev->refcnt);
	238	}
1da177e4	239
48daa3bb ED	240	static inline void in6_dev_hold(struct inet6_dev *idev)
	241	{
	242	atomic_inc(&idev->refcnt);
	243	}
1da177e4	244
e8e54d3c	245	void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
1da177e4 LT	246
	247	static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
	248	{
	249	if (atomic_dec_and_test(&ifp->refcnt))
	250	inet6_ifa_finish_destroy(ifp);
	251	}
	252
48daa3bb ED	253	static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
	254	{
	255	atomic_dec(&ifp->refcnt);
	256	}
1da177e4	257
48daa3bb ED	258	static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
	259	{
	260	atomic_inc(&ifp->refcnt);
	261	}
1da177e4	262
1da177e4 LT	263
	264	/*
	265	* compute link-local solicited-node multicast address
	266	*/
	267
	268	static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
	269	struct in6_addr *solicited)
	270	{
	271	ipv6_addr_set(solicited,
0e7b8dcd YH	272	htonl(0xFF020000), 0,
	273	htonl(0x1),
	274	htonl(0xFF000000) \| addr->s6_addr32[3]);
1da177e4 LT	275	}
1da177e4 LT	276
b27b28cb	277	static inline bool ipv6_addr_is_multicast(const struct in6_addr *addr)
1da177e4	278	{
0e7b8dcd	279	return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000);
1da177e4 LT	280	}
1da177e4 LT	281
b27b28cb	282	static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
1da177e4	283	{
d1641565 YH	284	#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
	285	__u64 p = (__u64 )addr;
	286	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) \| (p[1] ^ cpu_to_be64(1))) == 0UL;
	287	#else
48daa3bb	288	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
fed85383	289	addr->s6_addr32[1] \| addr->s6_addr32[2] \|
48daa3bb	290	(addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
d1641565	291	#endif
1da177e4 LT	292	}
1da177e4 LT	293
b27b28cb	294	static inline bool ipv6_addr_is_ll_all_routers(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(2))) == 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(0x00000002))) == 0;
d1641565	303	#endif
1da177e4 LT	304	}
1da177e4 LT	305
b27b28cb	306	static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
c7dc89c0	307	{
48daa3bb	308	return (addr->s6_addr32[2] \| htonl(0x02000000)) == htonl(0x02005EFE);
c7dc89c0 FT	309	}
c7dc89c0 FT	310
ca97a644 YH	311	static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
ca97a644 YH	312	{
9d100774 YH	313	#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
	314	__u64 p = (__u64 )addr;
	315	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) \|
	316	((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) &
	317	cpu_to_be64(0xffffffffff000000UL))) == 0UL;
	318	#else
	319	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
	320	addr->s6_addr32[1] \|
	321	(addr->s6_addr32[2] ^ htonl(0x00000001)) \|
	322	(addr->s6_addr[12] ^ 0xff)) == 0;
	323	#endif
ca97a644 YH	324	}
ca97a644 YH	325
20380731	326	#ifdef CONFIG_PROC_FS
e8e54d3c JP	327	int if6_proc_init(void);
e8e54d3c JP	328	void if6_proc_exit(void);
20380731 ACM	329	#endif
20380731 ACM	330
1da177e4	331	#endif