[mirror_ubuntu-artful-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)

#define ADDRCONF_NOTIFY_PRIORITY	0

#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);
int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr,
			    const struct net_device *dev, int strict,
			    u32 banned_flags);

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

bool ipv6_chk_custom_prefix(const struct in6_addr *addr,
				   const unsigned int prefix_len,
				   struct net_device *dev);

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,
		      u32 banned_flags);
int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
		    u32 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 int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
{
	if (dev->addr_len != ETH_ALEN)
		return -1;
	memcpy(eui, dev->dev_addr, 3);
	memcpy(eui + 5, dev->dev_addr + 3, 3);

	/*
	 * The zSeries OSA network cards can be shared among various
	 * OS instances, but the OSA cards have only one MAC address.
	 * This leads to duplicate address conflicts in conjunction
	 * with IPv6 if more than one instance uses the same card.
	 *
	 * The driver for these cards can deliver a unique 16-bit
	 * identifier for each instance sharing the same card.  It is
	 * placed instead of 0xFFFE in the interface identifier.  The
	 * "u" bit of the interface identifier is not inverted in this
	 * case.  Hence the resulting interface identifier has local
	 * scope according to RFC2373.
	 */
	if (dev->dev_id) {
		eui[3] = (dev->dev_id >> 8) & 0xFF;
		eui[4] = dev->dev_id & 0xFF;
	} else {
		eui[3] = 0xFF;
		eui[4] = 0xFE;
		eui[0] ^= 2;
	}
	return 0;
}

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);
int ipv6_mc_check_mld(struct sk_buff *skb, struct sk_buff **skb_trimmed);
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);

/* A stub used by vxlan module. This is ugly, ideally these
 * symbols should be built into the core kernel.
 */
struct ipv6_stub {
	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);
	int (*ipv6_dst_lookup)(struct net *net, struct sock *sk,
			       struct dst_entry **dst, struct flowi6 *fl6);
	void (*udpv6_encap_enable)(void);
	void (*ndisc_send_na)(struct net_device *dev, const struct in6_addr *daddr,
			      const struct in6_addr *solicited_addr,
			      bool router, bool solicited, bool override, bool inc_opt);
	struct neigh_table *nd_tbl;
};
extern const struct ipv6_stub *ipv6_stub __read_mostly;

/*
 * 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 inet6_dev *idev, const struct in6_addr *addr);
int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr);
void ipv6_ac_destroy_dev(struct inet6_dev *idev);
bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
			 const struct in6_addr *addr);
bool ipv6_chk_acast_addr_src(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;
}

static inline struct neigh_parms *__in6_dev_nd_parms_get_rcu(const struct net_device *dev)
{
	struct inet6_dev *idev = __in6_dev_get(dev);

	return idev ? idev->nd_parms : NULL;
}

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_ll_all_nodes(const struct in6_addr *addr)
{
#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
	__be64 *p = (__be64 *)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
	__be64 *p = (__be64 *)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
	__be64 *p = (__be64 *)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
78e9ce21 WC	22	#define ADDRCONF_NOTIFY_PRIORITY 0
78e9ce21 WC	23
c7dc89c0	24	#include <linux/in.h>
6a800d45 PM	25	#include <linux/in6.h>
6a800d45 PM	26
1da177e4 LT	27	struct prefix_info {
	28	__u8 type;
	29	__u8 length;
	30	__u8 prefix_len;
	31
	32	#if defined(__BIG_ENDIAN_BITFIELD)
	33	__u8 onlink : 1,
	34	autoconf : 1,
	35	reserved : 6;
	36	#elif defined(__LITTLE_ENDIAN_BITFIELD)
	37	__u8 reserved : 6,
	38	autoconf : 1,
	39	onlink : 1;
	40	#else
	41	#error "Please fix <asm/byteorder.h>"
	42	#endif
e69a4adc AV	43	__be32 valid;
	44	__be32 prefered;
	45	__be32 reserved2;
1da177e4 LT	46
	47	struct in6_addr prefix;
	48	};
	49
	50
1da177e4 LT	51	#include <linux/netdevice.h>
1da177e4 LT	52	#include <net/if_inet6.h>
e4553edd	53	#include <net/ipv6.h>
1da177e4	54
ddbe5032 ED	55	#define IN6_ADDR_HSIZE_SHIFT 4
ddbe5032 ED	56	#define IN6_ADDR_HSIZE (1 << IN6_ADDR_HSIZE_SHIFT)
1da177e4	57
e8e54d3c JP	58	int addrconf_init(void);
e8e54d3c JP	59	void addrconf_cleanup(void);
1da177e4	60
e8e54d3c JP	61	int addrconf_add_ifaddr(struct net net, void __user arg);
	62	int addrconf_del_ifaddr(struct net net, void __user arg);
	63	int addrconf_set_dstaddr(struct net net, void __user arg);
1da177e4	64
e8e54d3c JP	65	int ipv6_chk_addr(struct net net, const struct in6_addr addr,
e8e54d3c JP	66	const struct net_device *dev, int strict);
c58da4c6 EK	67	int ipv6_chk_addr_and_flags(struct net net, const struct in6_addr addr,
	68	const struct net_device *dev, int strict,
	69	u32 banned_flags);
bfeade08	70
59fbb3a6	71	#if defined(CONFIG_IPV6_MIP6) \|\| defined(CONFIG_IPV6_MIP6_MODULE)
e8e54d3c	72	int ipv6_chk_home_addr(struct net net, const struct in6_addr addr);
65d4ed92	73	#endif
52eeeb84	74
7df37ff3 CB	75	bool ipv6_chk_custom_prefix(const struct in6_addr *addr,
	76	const unsigned int prefix_len,
	77	struct net_device *dev);
	78
e8e54d3c JP	79	int ipv6_chk_prefix(const struct in6_addr addr, struct net_device dev);
	80
	81	struct inet6_ifaddr ipv6_get_ifaddr(struct net net,
	82	const struct in6_addr *addr,
	83	struct net_device *dev, int strict);
	84
	85	int ipv6_dev_get_saddr(struct net net, const struct net_device dev,
	86	const struct in6_addr *daddr, unsigned int srcprefs,
	87	struct in6_addr *saddr);
	88	int __ipv6_get_lladdr(struct inet6_dev idev, struct in6_addr addr,
479840ff	89	u32 banned_flags);
e8e54d3c	90	int ipv6_get_lladdr(struct net_device dev, struct in6_addr addr,
479840ff	91	u32 banned_flags);
e8e54d3c JP	92	int ipv6_rcv_saddr_equal(const struct sock sk, const struct sock sk2);
	93	void addrconf_join_solict(struct net_device dev, const struct in6_addr addr);
	94	void addrconf_leave_solict(struct inet6_dev idev, const struct in6_addr addr);
1da177e4	95
399e6f95 MB	96	static inline int addrconf_ifid_eui48(u8 eui, struct net_device dev)
	97	{
	98	if (dev->addr_len != ETH_ALEN)
	99	return -1;
	100	memcpy(eui, dev->dev_addr, 3);
	101	memcpy(eui + 5, dev->dev_addr + 3, 3);
	102
	103	/*
	104	* The zSeries OSA network cards can be shared among various
	105	* OS instances, but the OSA cards have only one MAC address.
	106	* This leads to duplicate address conflicts in conjunction
	107	* with IPv6 if more than one instance uses the same card.
	108	*
	109	* The driver for these cards can deliver a unique 16-bit
	110	* identifier for each instance sharing the same card. It is
	111	* placed instead of 0xFFFE in the interface identifier. The
	112	* "u" bit of the interface identifier is not inverted in this
	113	* case. Hence the resulting interface identifier has local
	114	* scope according to RFC2373.
	115	*/
	116	if (dev->dev_id) {
	117	eui[3] = (dev->dev_id >> 8) & 0xFF;
	118	eui[4] = dev->dev_id & 0xFF;
	119	} else {
	120	eui[3] = 0xFF;
	121	eui[4] = 0xFE;
	122	eui[0] ^= 2;
	123	}
	124	return 0;
	125	}
	126
4bed72e4	127	static inline unsigned long addrconf_timeout_fixup(u32 timeout,
95c96174	128	unsigned int unit)
4bed72e4 YH	129	{
	130	if (timeout == 0xffffffff)
	131	return ~0UL;
	132
	133	/*
	134	* Avoid arithmetic overflow.
	135	* Assuming unit is constant and non-zero, this "if" statement
	136	* will go away on 64bit archs.
	137	*/
	138	if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
	139	return LONG_MAX / unit;
	140
	141	return timeout;
	142	}
	143
	144	static inline int addrconf_finite_timeout(unsigned long timeout)
	145	{
	146	return ~timeout;
	147	}
	148
2a8cc6c8 YH	149	/*
	150	* IPv6 Address Label subsystem (addrlabel.c)
	151	*/
e8e54d3c JP	152	int ipv6_addr_label_init(void);
	153	void ipv6_addr_label_cleanup(void);
	154	void ipv6_addr_label_rtnl_register(void);
	155	u32 ipv6_addr_label(struct net net, const struct in6_addr addr,
	156	int type, int ifindex);
2a8cc6c8	157
1da177e4 LT	158	/*
	159	* multicast prototypes (mcast.c)
	160	*/
e8e54d3c JP	161	int ipv6_sock_mc_join(struct sock *sk, int ifindex,
	162	const struct in6_addr *addr);
	163	int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
	164	const struct in6_addr *addr);
	165	void ipv6_sock_mc_close(struct sock *sk);
	166	bool inet6_mc_check(struct sock sk, const struct in6_addr mc_addr,
	167	const struct in6_addr *src_addr);
	168
	169	int ipv6_dev_mc_inc(struct net_device dev, const struct in6_addr addr);
	170	int __ipv6_dev_mc_dec(struct inet6_dev idev, const struct in6_addr addr);
	171	int ipv6_dev_mc_dec(struct net_device dev, const struct in6_addr addr);
	172	void ipv6_mc_up(struct inet6_dev *idev);
	173	void ipv6_mc_down(struct inet6_dev *idev);
	174	void ipv6_mc_unmap(struct inet6_dev *idev);
	175	void ipv6_mc_remap(struct inet6_dev *idev);
	176	void ipv6_mc_init_dev(struct inet6_dev *idev);
	177	void ipv6_mc_destroy_dev(struct inet6_dev *idev);
9afd85c9	178	int ipv6_mc_check_mld(struct sk_buff skb, struct sk_buff *skb_trimmed);
e8e54d3c JP	179	void addrconf_dad_failure(struct inet6_ifaddr *ifp);
	180
	181	bool ipv6_chk_mcast_addr(struct net_device dev, const struct in6_addr group,
	182	const struct in6_addr *src_addr);
	183
	184	void ipv6_mc_dad_complete(struct inet6_dev *idev);
5f81bd2e CW	185
	186	/* A stub used by vxlan module. This is ugly, ideally these
	187	* symbols should be built into the core kernel.
	188	*/
	189	struct ipv6_stub {
	190	int (ipv6_sock_mc_join)(struct sock sk, int ifindex,
	191	const struct in6_addr *addr);
	192	int (ipv6_sock_mc_drop)(struct sock sk, int ifindex,
	193	const struct in6_addr *addr);
343d60aa RP	194	int (ipv6_dst_lookup)(struct net net, struct sock *sk,
343d60aa RP	195	struct dst_entry *dst, struct flowi6 fl6);
5f81bd2e	196	void (*udpv6_encap_enable)(void);
38cf595b	197	void (ndisc_send_na)(struct net_device dev, const struct in6_addr *daddr,
f564f45c CW	198	const struct in6_addr *solicited_addr,
f564f45c CW	199	bool router, bool solicited, bool override, bool inc_opt);
e15a00aa	200	struct neigh_table *nd_tbl;
5f81bd2e CW	201	};
	202	extern const struct ipv6_stub *ipv6_stub __read_mostly;
	203
daad1512 YH	204	/*
	205	* identify MLD packets for MLD filter exceptions
	206	*/
	207	static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
	208	{
	209	struct icmp6hdr *hdr;
	210
	211	if (nexthdr != IPPROTO_ICMPV6 \|\|
	212	!pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
	213	return false;
	214
	215	hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);
	216
	217	switch (hdr->icmp6_type) {
	218	case ICMPV6_MGM_QUERY:
	219	case ICMPV6_MGM_REPORT:
	220	case ICMPV6_MGM_REDUCTION:
	221	case ICMPV6_MLD2_REPORT:
	222	return true;
	223	default:
	224	break;
	225	}
	226	return false;
	227	}
1da177e4	228
e8e54d3c JP	229	void addrconf_prefix_rcv(struct net_device *dev,
e8e54d3c JP	230	u8 *opt, int len, bool sllao);
1da177e4	231
1da177e4 LT	232	/*
	233	* anycast prototypes (anycast.c)
	234	*/
e8e54d3c JP	235	int ipv6_sock_ac_join(struct sock *sk, int ifindex,
	236	const struct in6_addr *addr);
	237	int ipv6_sock_ac_drop(struct sock *sk, int ifindex,
	238	const struct in6_addr *addr);
	239	void ipv6_sock_ac_close(struct sock *sk);
	240
013b4d90	241	int __ipv6_dev_ac_inc(struct inet6_dev idev, const struct in6_addr addr);
e8e54d3c	242	int __ipv6_dev_ac_dec(struct inet6_dev idev, const struct in6_addr addr);
381f4dca	243	void ipv6_ac_destroy_dev(struct inet6_dev *idev);
e8e54d3c	244	bool ipv6_chk_acast_addr(struct net net, struct net_device dev,
7c90cc2d FLB	245	const struct in6_addr *addr);
	246	bool ipv6_chk_acast_addr_src(struct net net, struct net_device dev,
	247	const struct in6_addr *addr);
1da177e4 LT	248
1da177e4 LT	249	/* Device notifier */
e8e54d3c JP	250	int register_inet6addr_notifier(struct notifier_block *nb);
	251	int unregister_inet6addr_notifier(struct notifier_block *nb);
	252	int inet6addr_notifier_call_chain(unsigned long val, void *v);
1da177e4	253
e8e54d3c JP	254	void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
e8e54d3c JP	255	struct ipv6_devconf *devconf);
d67b8c61	256
48daa3bb ED	257	/**
	258	* __in6_dev_get - get inet6_dev pointer from netdevice
	259	* @dev: network device
	260	*
	261	* Caller must hold rcu_read_lock or RTNL, because this function
	262	* does not take a reference on the inet6_dev.
	263	*/
	264	static inline struct inet6_dev __in6_dev_get(const struct net_device dev)
1da177e4	265	{
48daa3bb	266	return rcu_dereference_rtnl(dev->ip6_ptr);
1da177e4 LT	267	}
1da177e4 LT	268
48daa3bb ED	269	/**
	270	* in6_dev_get - get inet6_dev pointer from netdevice
	271	* @dev: network device
	272	*
	273	* This version can be used in any context, and takes a reference
	274	* on the inet6_dev. Callers must use in6_dev_put() later to
	275	* release this reference.
	276	*/
	277	static inline struct inet6_dev in6_dev_get(const struct net_device dev)
1da177e4	278	{
48daa3bb ED	279	struct inet6_dev *idev;
48daa3bb ED	280
8814c4b5	281	rcu_read_lock();
48daa3bb	282	idev = rcu_dereference(dev->ip6_ptr);
1da177e4 LT	283	if (idev)
1da177e4 LT	284	atomic_inc(&idev->refcnt);
8814c4b5	285	rcu_read_unlock();
1da177e4 LT	286	return idev;
	287	}
	288
bba24896 JP	289	static inline struct neigh_parms __in6_dev_nd_parms_get_rcu(const struct net_device dev)
	290	{
	291	struct inet6_dev *idev = __in6_dev_get(dev);
	292
	293	return idev ? idev->nd_parms : NULL;
	294	}
	295
e8e54d3c	296	void in6_dev_finish_destroy(struct inet6_dev *idev);
1da177e4	297
48daa3bb	298	static inline void in6_dev_put(struct inet6_dev *idev)
1da177e4 LT	299	{
	300	if (atomic_dec_and_test(&idev->refcnt))
	301	in6_dev_finish_destroy(idev);
	302	}
	303
48daa3bb ED	304	static inline void __in6_dev_put(struct inet6_dev *idev)
	305	{
	306	atomic_dec(&idev->refcnt);
	307	}
1da177e4	308
48daa3bb ED	309	static inline void in6_dev_hold(struct inet6_dev *idev)
	310	{
	311	atomic_inc(&idev->refcnt);
	312	}
1da177e4	313
e8e54d3c	314	void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
1da177e4 LT	315
	316	static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
	317	{
	318	if (atomic_dec_and_test(&ifp->refcnt))
	319	inet6_ifa_finish_destroy(ifp);
	320	}
	321
48daa3bb ED	322	static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
	323	{
	324	atomic_dec(&ifp->refcnt);
	325	}
1da177e4	326
48daa3bb ED	327	static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
	328	{
	329	atomic_inc(&ifp->refcnt);
	330	}
1da177e4	331
1da177e4 LT	332
	333	/*
	334	* compute link-local solicited-node multicast address
	335	*/
	336
	337	static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
	338	struct in6_addr *solicited)
	339	{
	340	ipv6_addr_set(solicited,
0e7b8dcd YH	341	htonl(0xFF020000), 0,
	342	htonl(0x1),
	343	htonl(0xFF000000) \| addr->s6_addr32[3]);
1da177e4 LT	344	}
1da177e4 LT	345
b27b28cb	346	static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
1da177e4	347	{
d1641565	348	#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
bc861959	349	__be64 p = (__be64 )addr;
d1641565 YH	350	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) \| (p[1] ^ cpu_to_be64(1))) == 0UL;
d1641565 YH	351	#else
48daa3bb	352	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
fed85383	353	addr->s6_addr32[1] \| addr->s6_addr32[2] \|
48daa3bb	354	(addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
d1641565	355	#endif
1da177e4 LT	356	}
1da177e4 LT	357
b27b28cb	358	static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
1da177e4	359	{
d1641565	360	#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
bc861959	361	__be64 p = (__be64 )addr;
d1641565 YH	362	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) \| (p[1] ^ cpu_to_be64(2))) == 0UL;
d1641565 YH	363	#else
48daa3bb	364	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
fed85383	365	addr->s6_addr32[1] \| addr->s6_addr32[2] \|
48daa3bb	366	(addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
d1641565	367	#endif
1da177e4 LT	368	}
1da177e4 LT	369
b27b28cb	370	static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
c7dc89c0	371	{
48daa3bb	372	return (addr->s6_addr32[2] \| htonl(0x02000000)) == htonl(0x02005EFE);
c7dc89c0 FT	373	}
c7dc89c0 FT	374
ca97a644 YH	375	static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
ca97a644 YH	376	{
9d100774	377	#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
bc861959	378	__be64 p = (__be64 )addr;
9d100774 YH	379	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) \|
	380	((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) &
	381	cpu_to_be64(0xffffffffff000000UL))) == 0UL;
	382	#else
	383	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
	384	addr->s6_addr32[1] \|
	385	(addr->s6_addr32[2] ^ htonl(0x00000001)) \|
	386	(addr->s6_addr[12] ^ 0xff)) == 0;
	387	#endif
ca97a644 YH	388	}
ca97a644 YH	389
20380731	390	#ifdef CONFIG_PROC_FS
e8e54d3c JP	391	int if6_proc_init(void);
e8e54d3c JP	392	void if6_proc_exit(void);
20380731 ACM	393	#endif
20380731 ACM	394
1da177e4	395	#endif