[mirror_ubuntu-bionic-kernel.git] / include / net / addrconf.h

#ifndef _ADDRCONF_H
#define _ADDRCONF_H

#define MAX_RTR_SOLICITATIONS		-1		/* unlimited */
#define RTR_SOLICITATION_INTERVAL	(4*HZ)
#define RTR_SOLICITATION_MAX_INTERVAL	(3600*HZ)	/* 1 hour */

#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);

void addrconf_add_linklocal(struct inet6_dev *idev,
			    const struct in6_addr *addr, u32 flags);

int addrconf_prefix_rcv_add_addr(struct net *net, struct net_device *dev,
				 const struct prefix_info *pinfo,
				 struct inet6_dev *in6_dev,
				 const struct in6_addr *addr, int addr_type,
				 u32 addr_flags, bool sllao, bool tokenized,
				 __u32 valid_lft, u32 prefered_lft);

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);
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
bd11f074	4	#define MAX_RTR_SOLICITATIONS -1 /* unlimited */
1da177e4	5	#define RTR_SOLICITATION_INTERVAL (4*HZ)
bd11f074	6	#define RTR_SOLICITATION_MAX_INTERVAL (3600HZ) / 1 hour */
1da177e4 LT	7
	8	#define MIN_VALID_LIFETIME (23600) / 2 hours */
	9
	10	#define TEMP_VALID_LIFETIME (7*86400)
	11	#define TEMP_PREFERRED_LIFETIME (86400)
76f793e3	12	#define REGEN_MAX_RETRY (3)
1da177e4 LT	13	#define MAX_DESYNC_FACTOR (600)
	14
	15	#define ADDR_CHECK_FREQUENCY (120*HZ)
	16
	17	#define IPV6_MAX_ADDRESSES 16
	18
5c766d64 JP	19	#define ADDRCONF_TIMER_FUZZ_MINUS (HZ > 50 ? HZ / 50 : 1)
	20	#define ADDRCONF_TIMER_FUZZ (HZ / 4)
	21	#define ADDRCONF_TIMER_FUZZ_MAX (HZ)
	22
c7dc89c0	23	#include <linux/in.h>
6a800d45 PM	24	#include <linux/in6.h>
6a800d45 PM	25
1da177e4 LT	26	struct prefix_info {
	27	__u8 type;
	28	__u8 length;
	29	__u8 prefix_len;
	30
	31	#if defined(__BIG_ENDIAN_BITFIELD)
	32	__u8 onlink : 1,
	33	autoconf : 1,
	34	reserved : 6;
	35	#elif defined(__LITTLE_ENDIAN_BITFIELD)
	36	__u8 reserved : 6,
	37	autoconf : 1,
	38	onlink : 1;
	39	#else
	40	#error "Please fix <asm/byteorder.h>"
	41	#endif
e69a4adc AV	42	__be32 valid;
	43	__be32 prefered;
	44	__be32 reserved2;
1da177e4 LT	45
	46	struct in6_addr prefix;
	47	};
	48
	49
1da177e4 LT	50	#include <linux/netdevice.h>
1da177e4 LT	51	#include <net/if_inet6.h>
e4553edd	52	#include <net/ipv6.h>
1da177e4	53
ddbe5032 ED	54	#define IN6_ADDR_HSIZE_SHIFT 4
ddbe5032 ED	55	#define IN6_ADDR_HSIZE (1 << IN6_ADDR_HSIZE_SHIFT)
1da177e4	56
e8e54d3c JP	57	int addrconf_init(void);
e8e54d3c JP	58	void addrconf_cleanup(void);
1da177e4	59
e8e54d3c JP	60	int addrconf_add_ifaddr(struct net net, void __user arg);
	61	int addrconf_del_ifaddr(struct net net, void __user arg);
	62	int addrconf_set_dstaddr(struct net net, void __user arg);
1da177e4	63
e8e54d3c JP	64	int ipv6_chk_addr(struct net net, const struct in6_addr addr,
e8e54d3c JP	65	const struct net_device *dev, int strict);
c58da4c6 EK	66	int ipv6_chk_addr_and_flags(struct net net, const struct in6_addr addr,
	67	const struct net_device *dev, int strict,
	68	u32 banned_flags);
bfeade08	69
59fbb3a6	70	#if defined(CONFIG_IPV6_MIP6) \|\| defined(CONFIG_IPV6_MIP6_MODULE)
e8e54d3c	71	int ipv6_chk_home_addr(struct net net, const struct in6_addr addr);
65d4ed92	72	#endif
52eeeb84	73
7df37ff3 CB	74	bool ipv6_chk_custom_prefix(const struct in6_addr *addr,
	75	const unsigned int prefix_len,
	76	struct net_device *dev);
	77
e8e54d3c JP	78	int ipv6_chk_prefix(const struct in6_addr addr, struct net_device dev);
	79
	80	struct inet6_ifaddr ipv6_get_ifaddr(struct net net,
	81	const struct in6_addr *addr,
	82	struct net_device *dev, int strict);
	83
	84	int ipv6_dev_get_saddr(struct net net, const struct net_device dev,
	85	const struct in6_addr *daddr, unsigned int srcprefs,
	86	struct in6_addr *saddr);
	87	int __ipv6_get_lladdr(struct inet6_dev idev, struct in6_addr addr,
479840ff	88	u32 banned_flags);
e8e54d3c	89	int ipv6_get_lladdr(struct net_device dev, struct in6_addr addr,
479840ff	90	u32 banned_flags);
a583636a CG	91	int ipv4_rcv_saddr_equal(const struct sock sk, const struct sock sk2,
a583636a CG	92	bool match_wildcard);
e32ea7e7 CG	93	int ipv6_rcv_saddr_equal(const struct sock sk, const struct sock sk2,
e32ea7e7 CG	94	bool match_wildcard);
e8e54d3c JP	95	void addrconf_join_solict(struct net_device dev, const struct in6_addr addr);
e8e54d3c JP	96	void addrconf_leave_solict(struct inet6_dev idev, const struct in6_addr addr);
1da177e4	97
2ad3ed59 AA	98	void addrconf_add_linklocal(struct inet6_dev *idev,
	99	const struct in6_addr *addr, u32 flags);
	100
cc84b3c6 AA	101	int addrconf_prefix_rcv_add_addr(struct net net, struct net_device dev,
	102	const struct prefix_info *pinfo,
	103	struct inet6_dev *in6_dev,
	104	const struct in6_addr *addr, int addr_type,
	105	u32 addr_flags, bool sllao, bool tokenized,
	106	__u32 valid_lft, u32 prefered_lft);
	107
399e6f95 MB	108	static inline int addrconf_ifid_eui48(u8 eui, struct net_device dev)
	109	{
	110	if (dev->addr_len != ETH_ALEN)
	111	return -1;
	112	memcpy(eui, dev->dev_addr, 3);
	113	memcpy(eui + 5, dev->dev_addr + 3, 3);
	114
	115	/*
	116	* The zSeries OSA network cards can be shared among various
	117	* OS instances, but the OSA cards have only one MAC address.
	118	* This leads to duplicate address conflicts in conjunction
	119	* with IPv6 if more than one instance uses the same card.
	120	*
	121	* The driver for these cards can deliver a unique 16-bit
	122	* identifier for each instance sharing the same card. It is
	123	* placed instead of 0xFFFE in the interface identifier. The
	124	* "u" bit of the interface identifier is not inverted in this
	125	* case. Hence the resulting interface identifier has local
	126	* scope according to RFC2373.
	127	*/
	128	if (dev->dev_id) {
	129	eui[3] = (dev->dev_id >> 8) & 0xFF;
	130	eui[4] = dev->dev_id & 0xFF;
	131	} else {
	132	eui[3] = 0xFF;
	133	eui[4] = 0xFE;
	134	eui[0] ^= 2;
	135	}
	136	return 0;
	137	}
	138
4bed72e4	139	static inline unsigned long addrconf_timeout_fixup(u32 timeout,
95c96174	140	unsigned int unit)
4bed72e4 YH	141	{
	142	if (timeout == 0xffffffff)
	143	return ~0UL;
	144
	145	/*
	146	* Avoid arithmetic overflow.
	147	* Assuming unit is constant and non-zero, this "if" statement
	148	* will go away on 64bit archs.
	149	*/
	150	if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
	151	return LONG_MAX / unit;
	152
	153	return timeout;
	154	}
	155
	156	static inline int addrconf_finite_timeout(unsigned long timeout)
	157	{
	158	return ~timeout;
	159	}
	160
2a8cc6c8 YH	161	/*
	162	* IPv6 Address Label subsystem (addrlabel.c)
	163	*/
e8e54d3c JP	164	int ipv6_addr_label_init(void);
	165	void ipv6_addr_label_cleanup(void);
	166	void ipv6_addr_label_rtnl_register(void);
	167	u32 ipv6_addr_label(struct net net, const struct in6_addr addr,
	168	int type, int ifindex);
2a8cc6c8	169
1da177e4 LT	170	/*
	171	* multicast prototypes (mcast.c)
	172	*/
e8e54d3c JP	173	int ipv6_sock_mc_join(struct sock *sk, int ifindex,
	174	const struct in6_addr *addr);
	175	int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
	176	const struct in6_addr *addr);
8651be8f	177	void __ipv6_sock_mc_close(struct sock *sk);
e8e54d3c JP	178	void ipv6_sock_mc_close(struct sock *sk);
	179	bool inet6_mc_check(struct sock sk, const struct in6_addr mc_addr,
	180	const struct in6_addr *src_addr);
	181
	182	int ipv6_dev_mc_inc(struct net_device dev, const struct in6_addr addr);
	183	int __ipv6_dev_mc_dec(struct inet6_dev idev, const struct in6_addr addr);
	184	int ipv6_dev_mc_dec(struct net_device dev, const struct in6_addr addr);
	185	void ipv6_mc_up(struct inet6_dev *idev);
	186	void ipv6_mc_down(struct inet6_dev *idev);
	187	void ipv6_mc_unmap(struct inet6_dev *idev);
	188	void ipv6_mc_remap(struct inet6_dev *idev);
	189	void ipv6_mc_init_dev(struct inet6_dev *idev);
	190	void ipv6_mc_destroy_dev(struct inet6_dev *idev);
9afd85c9	191	int ipv6_mc_check_mld(struct sk_buff skb, struct sk_buff *skb_trimmed);
e8e54d3c JP	192	void addrconf_dad_failure(struct inet6_ifaddr *ifp);
	193
	194	bool ipv6_chk_mcast_addr(struct net_device dev, const struct in6_addr group,
	195	const struct in6_addr *src_addr);
	196
	197	void ipv6_mc_dad_complete(struct inet6_dev *idev);
5f81bd2e CW	198
	199	/* A stub used by vxlan module. This is ugly, ideally these
	200	* symbols should be built into the core kernel.
	201	*/
	202	struct ipv6_stub {
	203	int (ipv6_sock_mc_join)(struct sock sk, int ifindex,
	204	const struct in6_addr *addr);
	205	int (ipv6_sock_mc_drop)(struct sock sk, int ifindex,
	206	const struct in6_addr *addr);
343d60aa RP	207	int (ipv6_dst_lookup)(struct net net, struct sock *sk,
343d60aa RP	208	struct dst_entry *dst, struct flowi6 fl6);
5f81bd2e	209	void (*udpv6_encap_enable)(void);
38cf595b	210	void (ndisc_send_na)(struct net_device dev, const struct in6_addr *daddr,
f564f45c CW	211	const struct in6_addr *solicited_addr,
f564f45c CW	212	bool router, bool solicited, bool override, bool inc_opt);
e15a00aa	213	struct neigh_table *nd_tbl;
5f81bd2e CW	214	};
	215	extern const struct ipv6_stub *ipv6_stub __read_mostly;
	216
daad1512 YH	217	/*
	218	* identify MLD packets for MLD filter exceptions
	219	*/
	220	static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
	221	{
	222	struct icmp6hdr *hdr;
	223
	224	if (nexthdr != IPPROTO_ICMPV6 \|\|
	225	!pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
	226	return false;
	227
	228	hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);
	229
	230	switch (hdr->icmp6_type) {
	231	case ICMPV6_MGM_QUERY:
	232	case ICMPV6_MGM_REPORT:
	233	case ICMPV6_MGM_REDUCTION:
	234	case ICMPV6_MLD2_REPORT:
	235	return true;
	236	default:
	237	break;
	238	}
	239	return false;
	240	}
1da177e4	241
e8e54d3c JP	242	void addrconf_prefix_rcv(struct net_device *dev,
e8e54d3c JP	243	u8 *opt, int len, bool sllao);
1da177e4	244
1da177e4 LT	245	/*
	246	* anycast prototypes (anycast.c)
	247	*/
e8e54d3c JP	248	int ipv6_sock_ac_join(struct sock *sk, int ifindex,
	249	const struct in6_addr *addr);
	250	int ipv6_sock_ac_drop(struct sock *sk, int ifindex,
	251	const struct in6_addr *addr);
	252	void ipv6_sock_ac_close(struct sock *sk);
	253
013b4d90	254	int __ipv6_dev_ac_inc(struct inet6_dev idev, const struct in6_addr addr);
e8e54d3c	255	int __ipv6_dev_ac_dec(struct inet6_dev idev, const struct in6_addr addr);
381f4dca	256	void ipv6_ac_destroy_dev(struct inet6_dev *idev);
e8e54d3c	257	bool ipv6_chk_acast_addr(struct net net, struct net_device dev,
7c90cc2d FLB	258	const struct in6_addr *addr);
	259	bool ipv6_chk_acast_addr_src(struct net net, struct net_device dev,
	260	const struct in6_addr *addr);
1da177e4 LT	261
1da177e4 LT	262	/* Device notifier */
e8e54d3c JP	263	int register_inet6addr_notifier(struct notifier_block *nb);
	264	int unregister_inet6addr_notifier(struct notifier_block *nb);
	265	int inet6addr_notifier_call_chain(unsigned long val, void *v);
1da177e4	266
e8e54d3c JP	267	void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
e8e54d3c JP	268	struct ipv6_devconf *devconf);
d67b8c61	269
48daa3bb ED	270	/**
	271	* __in6_dev_get - get inet6_dev pointer from netdevice
	272	* @dev: network device
	273	*
	274	* Caller must hold rcu_read_lock or RTNL, because this function
	275	* does not take a reference on the inet6_dev.
	276	*/
	277	static inline struct inet6_dev __in6_dev_get(const struct net_device dev)
1da177e4	278	{
48daa3bb	279	return rcu_dereference_rtnl(dev->ip6_ptr);
1da177e4 LT	280	}
1da177e4 LT	281
48daa3bb ED	282	/**
	283	* in6_dev_get - get inet6_dev pointer from netdevice
	284	* @dev: network device
	285	*
	286	* This version can be used in any context, and takes a reference
	287	* on the inet6_dev. Callers must use in6_dev_put() later to
	288	* release this reference.
	289	*/
	290	static inline struct inet6_dev in6_dev_get(const struct net_device dev)
1da177e4	291	{
48daa3bb ED	292	struct inet6_dev *idev;
48daa3bb ED	293
8814c4b5	294	rcu_read_lock();
48daa3bb	295	idev = rcu_dereference(dev->ip6_ptr);
1da177e4 LT	296	if (idev)
1da177e4 LT	297	atomic_inc(&idev->refcnt);
8814c4b5	298	rcu_read_unlock();
1da177e4 LT	299	return idev;
	300	}
	301
bba24896 JP	302	static inline struct neigh_parms __in6_dev_nd_parms_get_rcu(const struct net_device dev)
	303	{
	304	struct inet6_dev *idev = __in6_dev_get(dev);
	305
	306	return idev ? idev->nd_parms : NULL;
	307	}
	308
e8e54d3c	309	void in6_dev_finish_destroy(struct inet6_dev *idev);
1da177e4	310
48daa3bb	311	static inline void in6_dev_put(struct inet6_dev *idev)
1da177e4 LT	312	{
	313	if (atomic_dec_and_test(&idev->refcnt))
	314	in6_dev_finish_destroy(idev);
	315	}
	316
48daa3bb ED	317	static inline void __in6_dev_put(struct inet6_dev *idev)
	318	{
	319	atomic_dec(&idev->refcnt);
	320	}
1da177e4	321
48daa3bb ED	322	static inline void in6_dev_hold(struct inet6_dev *idev)
	323	{
	324	atomic_inc(&idev->refcnt);
	325	}
1da177e4	326
e8e54d3c	327	void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
1da177e4 LT	328
	329	static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
	330	{
	331	if (atomic_dec_and_test(&ifp->refcnt))
	332	inet6_ifa_finish_destroy(ifp);
	333	}
	334
48daa3bb ED	335	static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
	336	{
	337	atomic_dec(&ifp->refcnt);
	338	}
1da177e4	339
48daa3bb ED	340	static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
	341	{
	342	atomic_inc(&ifp->refcnt);
	343	}
1da177e4	344
1da177e4 LT	345
	346	/*
	347	* compute link-local solicited-node multicast address
	348	*/
	349
	350	static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
	351	struct in6_addr *solicited)
	352	{
	353	ipv6_addr_set(solicited,
0e7b8dcd YH	354	htonl(0xFF020000), 0,
	355	htonl(0x1),
	356	htonl(0xFF000000) \| addr->s6_addr32[3]);
1da177e4 LT	357	}
1da177e4 LT	358
b27b28cb	359	static inline bool ipv6_addr_is_ll_all_nodes(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(1))) == 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(0x00000001))) == 0;
d1641565	368	#endif
1da177e4 LT	369	}
1da177e4 LT	370
b27b28cb	371	static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
1da177e4	372	{
d1641565	373	#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
bc861959	374	__be64 p = (__be64 )addr;
d1641565 YH	375	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) \| (p[1] ^ cpu_to_be64(2))) == 0UL;
d1641565 YH	376	#else
48daa3bb	377	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
fed85383	378	addr->s6_addr32[1] \| addr->s6_addr32[2] \|
48daa3bb	379	(addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
d1641565	380	#endif
1da177e4 LT	381	}
1da177e4 LT	382
b27b28cb	383	static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
c7dc89c0	384	{
48daa3bb	385	return (addr->s6_addr32[2] \| htonl(0x02000000)) == htonl(0x02005EFE);
c7dc89c0 FT	386	}
c7dc89c0 FT	387
ca97a644 YH	388	static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
ca97a644 YH	389	{
9d100774	390	#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
bc861959	391	__be64 p = (__be64 )addr;
9d100774 YH	392	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) \|
	393	((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) &
	394	cpu_to_be64(0xffffffffff000000UL))) == 0UL;
	395	#else
	396	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
	397	addr->s6_addr32[1] \|
	398	(addr->s6_addr32[2] ^ htonl(0x00000001)) \|
	399	(addr->s6_addr[12] ^ 0xff)) == 0;
	400	#endif
ca97a644 YH	401	}
ca97a644 YH	402
20380731	403	#ifdef CONFIG_PROC_FS
e8e54d3c JP	404	int if6_proc_init(void);
e8e54d3c JP	405	void if6_proc_exit(void);
20380731 ACM	406	#endif
20380731 ACM	407
1da177e4	408	#endif