[linux-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)

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 ipv4_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2,
			 bool match_wildcard);
int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2,
			 bool match_wildcard);
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
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);
c58da4c6 EK	65	int ipv6_chk_addr_and_flags(struct net net, const struct in6_addr addr,
	66	const struct net_device *dev, int strict,
	67	u32 banned_flags);
bfeade08	68
59fbb3a6	69	#if defined(CONFIG_IPV6_MIP6) \|\| defined(CONFIG_IPV6_MIP6_MODULE)
e8e54d3c	70	int ipv6_chk_home_addr(struct net net, const struct in6_addr addr);
65d4ed92	71	#endif
52eeeb84	72
7df37ff3 CB	73	bool ipv6_chk_custom_prefix(const struct in6_addr *addr,
	74	const unsigned int prefix_len,
	75	struct net_device *dev);
	76
e8e54d3c JP	77	int ipv6_chk_prefix(const struct in6_addr addr, struct net_device dev);
	78
	79	struct inet6_ifaddr ipv6_get_ifaddr(struct net net,
	80	const struct in6_addr *addr,
	81	struct net_device *dev, int strict);
	82
	83	int ipv6_dev_get_saddr(struct net net, const struct net_device dev,
	84	const struct in6_addr *daddr, unsigned int srcprefs,
	85	struct in6_addr *saddr);
	86	int __ipv6_get_lladdr(struct inet6_dev idev, struct in6_addr addr,
479840ff	87	u32 banned_flags);
e8e54d3c	88	int ipv6_get_lladdr(struct net_device dev, struct in6_addr addr,
479840ff	89	u32 banned_flags);
a583636a CG	90	int ipv4_rcv_saddr_equal(const struct sock sk, const struct sock sk2,
a583636a CG	91	bool match_wildcard);
e32ea7e7 CG	92	int ipv6_rcv_saddr_equal(const struct sock sk, const struct sock sk2,
e32ea7e7 CG	93	bool match_wildcard);
e8e54d3c JP	94	void addrconf_join_solict(struct net_device dev, const struct in6_addr addr);
e8e54d3c JP	95	void addrconf_leave_solict(struct inet6_dev idev, const struct in6_addr addr);
1da177e4	96
399e6f95 MB	97	static inline int addrconf_ifid_eui48(u8 eui, struct net_device dev)
	98	{
	99	if (dev->addr_len != ETH_ALEN)
	100	return -1;
	101	memcpy(eui, dev->dev_addr, 3);
	102	memcpy(eui + 5, dev->dev_addr + 3, 3);
	103
	104	/*
	105	* The zSeries OSA network cards can be shared among various
	106	* OS instances, but the OSA cards have only one MAC address.
	107	* This leads to duplicate address conflicts in conjunction
	108	* with IPv6 if more than one instance uses the same card.
	109	*
	110	* The driver for these cards can deliver a unique 16-bit
	111	* identifier for each instance sharing the same card. It is
	112	* placed instead of 0xFFFE in the interface identifier. The
	113	* "u" bit of the interface identifier is not inverted in this
	114	* case. Hence the resulting interface identifier has local
	115	* scope according to RFC2373.
	116	*/
	117	if (dev->dev_id) {
	118	eui[3] = (dev->dev_id >> 8) & 0xFF;
	119	eui[4] = dev->dev_id & 0xFF;
	120	} else {
	121	eui[3] = 0xFF;
	122	eui[4] = 0xFE;
	123	eui[0] ^= 2;
	124	}
	125	return 0;
	126	}
	127
4bed72e4	128	static inline unsigned long addrconf_timeout_fixup(u32 timeout,
95c96174	129	unsigned int unit)
4bed72e4 YH	130	{
	131	if (timeout == 0xffffffff)
	132	return ~0UL;
	133
	134	/*
	135	* Avoid arithmetic overflow.
	136	* Assuming unit is constant and non-zero, this "if" statement
	137	* will go away on 64bit archs.
	138	*/
	139	if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
	140	return LONG_MAX / unit;
	141
	142	return timeout;
	143	}
	144
	145	static inline int addrconf_finite_timeout(unsigned long timeout)
	146	{
	147	return ~timeout;
	148	}
	149
2a8cc6c8 YH	150	/*
	151	* IPv6 Address Label subsystem (addrlabel.c)
	152	*/
e8e54d3c JP	153	int ipv6_addr_label_init(void);
	154	void ipv6_addr_label_cleanup(void);
	155	void ipv6_addr_label_rtnl_register(void);
	156	u32 ipv6_addr_label(struct net net, const struct in6_addr addr,
	157	int type, int ifindex);
2a8cc6c8	158
1da177e4 LT	159	/*
	160	* multicast prototypes (mcast.c)
	161	*/
e8e54d3c JP	162	int ipv6_sock_mc_join(struct sock *sk, int ifindex,
	163	const struct in6_addr *addr);
	164	int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
	165	const struct in6_addr *addr);
	166	void ipv6_sock_mc_close(struct sock *sk);
	167	bool inet6_mc_check(struct sock sk, const struct in6_addr mc_addr,
	168	const struct in6_addr *src_addr);
	169
	170	int ipv6_dev_mc_inc(struct net_device dev, const struct in6_addr addr);
	171	int __ipv6_dev_mc_dec(struct inet6_dev idev, const struct in6_addr addr);
	172	int ipv6_dev_mc_dec(struct net_device dev, const struct in6_addr addr);
	173	void ipv6_mc_up(struct inet6_dev *idev);
	174	void ipv6_mc_down(struct inet6_dev *idev);
	175	void ipv6_mc_unmap(struct inet6_dev *idev);
	176	void ipv6_mc_remap(struct inet6_dev *idev);
	177	void ipv6_mc_init_dev(struct inet6_dev *idev);
	178	void ipv6_mc_destroy_dev(struct inet6_dev *idev);
9afd85c9	179	int ipv6_mc_check_mld(struct sk_buff skb, struct sk_buff *skb_trimmed);
e8e54d3c JP	180	void addrconf_dad_failure(struct inet6_ifaddr *ifp);
	181
	182	bool ipv6_chk_mcast_addr(struct net_device dev, const struct in6_addr group,
	183	const struct in6_addr *src_addr);
	184
	185	void ipv6_mc_dad_complete(struct inet6_dev *idev);
5f81bd2e CW	186
	187	/* A stub used by vxlan module. This is ugly, ideally these
	188	* symbols should be built into the core kernel.
	189	*/
	190	struct ipv6_stub {
	191	int (ipv6_sock_mc_join)(struct sock sk, int ifindex,
	192	const struct in6_addr *addr);
	193	int (ipv6_sock_mc_drop)(struct sock sk, int ifindex,
	194	const struct in6_addr *addr);
343d60aa RP	195	int (ipv6_dst_lookup)(struct net net, struct sock *sk,
343d60aa RP	196	struct dst_entry *dst, struct flowi6 fl6);
5f81bd2e	197	void (*udpv6_encap_enable)(void);
38cf595b	198	void (ndisc_send_na)(struct net_device dev, const struct in6_addr *daddr,
f564f45c CW	199	const struct in6_addr *solicited_addr,
f564f45c CW	200	bool router, bool solicited, bool override, bool inc_opt);
e15a00aa	201	struct neigh_table *nd_tbl;
5f81bd2e CW	202	};
	203	extern const struct ipv6_stub *ipv6_stub __read_mostly;
	204
daad1512 YH	205	/*
	206	* identify MLD packets for MLD filter exceptions
	207	*/
	208	static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
	209	{
	210	struct icmp6hdr *hdr;
	211
	212	if (nexthdr != IPPROTO_ICMPV6 \|\|
	213	!pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
	214	return false;
	215
	216	hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);
	217
	218	switch (hdr->icmp6_type) {
	219	case ICMPV6_MGM_QUERY:
	220	case ICMPV6_MGM_REPORT:
	221	case ICMPV6_MGM_REDUCTION:
	222	case ICMPV6_MLD2_REPORT:
	223	return true;
	224	default:
	225	break;
	226	}
	227	return false;
	228	}
1da177e4	229
e8e54d3c JP	230	void addrconf_prefix_rcv(struct net_device *dev,
e8e54d3c JP	231	u8 *opt, int len, bool sllao);
1da177e4	232
1da177e4 LT	233	/*
	234	* anycast prototypes (anycast.c)
	235	*/
e8e54d3c JP	236	int ipv6_sock_ac_join(struct sock *sk, int ifindex,
	237	const struct in6_addr *addr);
	238	int ipv6_sock_ac_drop(struct sock *sk, int ifindex,
	239	const struct in6_addr *addr);
	240	void ipv6_sock_ac_close(struct sock *sk);
	241
013b4d90	242	int __ipv6_dev_ac_inc(struct inet6_dev idev, const struct in6_addr addr);
e8e54d3c	243	int __ipv6_dev_ac_dec(struct inet6_dev idev, const struct in6_addr addr);
381f4dca	244	void ipv6_ac_destroy_dev(struct inet6_dev *idev);
e8e54d3c	245	bool ipv6_chk_acast_addr(struct net net, struct net_device dev,
7c90cc2d FLB	246	const struct in6_addr *addr);
	247	bool ipv6_chk_acast_addr_src(struct net net, struct net_device dev,
	248	const struct in6_addr *addr);
1da177e4 LT	249
1da177e4 LT	250	/* Device notifier */
e8e54d3c JP	251	int register_inet6addr_notifier(struct notifier_block *nb);
	252	int unregister_inet6addr_notifier(struct notifier_block *nb);
	253	int inet6addr_notifier_call_chain(unsigned long val, void *v);
1da177e4	254
e8e54d3c JP	255	void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
e8e54d3c JP	256	struct ipv6_devconf *devconf);
d67b8c61	257
48daa3bb ED	258	/**
	259	* __in6_dev_get - get inet6_dev pointer from netdevice
	260	* @dev: network device
	261	*
	262	* Caller must hold rcu_read_lock or RTNL, because this function
	263	* does not take a reference on the inet6_dev.
	264	*/
	265	static inline struct inet6_dev __in6_dev_get(const struct net_device dev)
1da177e4	266	{
48daa3bb	267	return rcu_dereference_rtnl(dev->ip6_ptr);
1da177e4 LT	268	}
1da177e4 LT	269
48daa3bb ED	270	/**
	271	* in6_dev_get - get inet6_dev pointer from netdevice
	272	* @dev: network device
	273	*
	274	* This version can be used in any context, and takes a reference
	275	* on the inet6_dev. Callers must use in6_dev_put() later to
	276	* release this reference.
	277	*/
	278	static inline struct inet6_dev in6_dev_get(const struct net_device dev)
1da177e4	279	{
48daa3bb ED	280	struct inet6_dev *idev;
48daa3bb ED	281
8814c4b5	282	rcu_read_lock();
48daa3bb	283	idev = rcu_dereference(dev->ip6_ptr);
1da177e4 LT	284	if (idev)
1da177e4 LT	285	atomic_inc(&idev->refcnt);
8814c4b5	286	rcu_read_unlock();
1da177e4 LT	287	return idev;
	288	}
	289
bba24896 JP	290	static inline struct neigh_parms __in6_dev_nd_parms_get_rcu(const struct net_device dev)
	291	{
	292	struct inet6_dev *idev = __in6_dev_get(dev);
	293
	294	return idev ? idev->nd_parms : NULL;
	295	}
	296
e8e54d3c	297	void in6_dev_finish_destroy(struct inet6_dev *idev);
1da177e4	298
48daa3bb	299	static inline void in6_dev_put(struct inet6_dev *idev)
1da177e4 LT	300	{
	301	if (atomic_dec_and_test(&idev->refcnt))
	302	in6_dev_finish_destroy(idev);
	303	}
	304
48daa3bb ED	305	static inline void __in6_dev_put(struct inet6_dev *idev)
	306	{
	307	atomic_dec(&idev->refcnt);
	308	}
1da177e4	309
48daa3bb ED	310	static inline void in6_dev_hold(struct inet6_dev *idev)
	311	{
	312	atomic_inc(&idev->refcnt);
	313	}
1da177e4	314
e8e54d3c	315	void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
1da177e4 LT	316
	317	static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
	318	{
	319	if (atomic_dec_and_test(&ifp->refcnt))
	320	inet6_ifa_finish_destroy(ifp);
	321	}
	322
48daa3bb ED	323	static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
	324	{
	325	atomic_dec(&ifp->refcnt);
	326	}
1da177e4	327
48daa3bb ED	328	static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
	329	{
	330	atomic_inc(&ifp->refcnt);
	331	}
1da177e4	332
1da177e4 LT	333
	334	/*
	335	* compute link-local solicited-node multicast address
	336	*/
	337
	338	static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
	339	struct in6_addr *solicited)
	340	{
	341	ipv6_addr_set(solicited,
0e7b8dcd YH	342	htonl(0xFF020000), 0,
	343	htonl(0x1),
	344	htonl(0xFF000000) \| addr->s6_addr32[3]);
1da177e4 LT	345	}
1da177e4 LT	346
b27b28cb	347	static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
1da177e4	348	{
d1641565	349	#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
bc861959	350	__be64 p = (__be64 )addr;
d1641565 YH	351	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) \| (p[1] ^ cpu_to_be64(1))) == 0UL;
d1641565 YH	352	#else
48daa3bb	353	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
fed85383	354	addr->s6_addr32[1] \| addr->s6_addr32[2] \|
48daa3bb	355	(addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
d1641565	356	#endif
1da177e4 LT	357	}
1da177e4 LT	358
b27b28cb	359	static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
1da177e4	360	{
d1641565	361	#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
bc861959	362	__be64 p = (__be64 )addr;
d1641565 YH	363	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) \| (p[1] ^ cpu_to_be64(2))) == 0UL;
d1641565 YH	364	#else
48daa3bb	365	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
fed85383	366	addr->s6_addr32[1] \| addr->s6_addr32[2] \|
48daa3bb	367	(addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
d1641565	368	#endif
1da177e4 LT	369	}
1da177e4 LT	370
b27b28cb	371	static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
c7dc89c0	372	{
48daa3bb	373	return (addr->s6_addr32[2] \| htonl(0x02000000)) == htonl(0x02005EFE);
c7dc89c0 FT	374	}
c7dc89c0 FT	375
ca97a644 YH	376	static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
ca97a644 YH	377	{
9d100774	378	#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
bc861959	379	__be64 p = (__be64 )addr;
9d100774 YH	380	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) \|
	381	((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) &
	382	cpu_to_be64(0xffffffffff000000UL))) == 0UL;
	383	#else
	384	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
	385	addr->s6_addr32[1] \|
	386	(addr->s6_addr32[2] ^ htonl(0x00000001)) \|
	387	(addr->s6_addr[12] ^ 0xff)) == 0;
	388	#endif
ca97a644 YH	389	}
ca97a644 YH	390
20380731	391	#ifdef CONFIG_PROC_FS
e8e54d3c JP	392	int if6_proc_init(void);
e8e54d3c JP	393	void if6_proc_exit(void);
20380731 ACM	394	#endif
20380731 ACM	395
1da177e4	396	#endif