[mirror_ubuntu-artful-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)

#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 inet_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 void addrconf_addr_eui48_base(u8 *eui, const char *const addr)
{
	memcpy(eui, addr, 3);
	eui[3] = 0xFF;
	eui[4] = 0xFE;
	memcpy(eui + 5, addr + 3, 3);
}

static inline void addrconf_addr_eui48(u8 *eui, const char *const addr)
{
	addrconf_addr_eui48_base(eui, addr);
	eui[0] ^= 2;
}

static inline int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
{
	if (dev->addr_len != ETH_ALEN)
		return -1;

	/*
	 * 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.
	 */

	addrconf_addr_eui48_base(eui, dev->dev_addr);

	if (dev->dev_id) {
		eui[3] = (dev->dev_id >> 8) & 0xFF;
		eui[4] = dev->dev_id & 0xFF;
	} else {
		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 event, 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
242d3a49 WC	23	#define ADDRCONF_NOTIFY_PRIORITY 0
242d3a49 WC	24
c7dc89c0	25	#include <linux/in.h>
6a800d45 PM	26	#include <linux/in6.h>
6a800d45 PM	27
1da177e4 LT	28	struct prefix_info {
	29	__u8 type;
	30	__u8 length;
	31	__u8 prefix_len;
	32
	33	#if defined(__BIG_ENDIAN_BITFIELD)
	34	__u8 onlink : 1,
	35	autoconf : 1,
	36	reserved : 6;
	37	#elif defined(__LITTLE_ENDIAN_BITFIELD)
	38	__u8 reserved : 6,
	39	autoconf : 1,
	40	onlink : 1;
	41	#else
	42	#error "Please fix <asm/byteorder.h>"
	43	#endif
e69a4adc AV	44	__be32 valid;
	45	__be32 prefered;
	46	__be32 reserved2;
1da177e4 LT	47
	48	struct in6_addr prefix;
	49	};
	50
	51
1da177e4 LT	52	#include <linux/netdevice.h>
1da177e4 LT	53	#include <net/if_inet6.h>
e4553edd	54	#include <net/ipv6.h>
1da177e4	55
ddbe5032 ED	56	#define IN6_ADDR_HSIZE_SHIFT 4
ddbe5032 ED	57	#define IN6_ADDR_HSIZE (1 << IN6_ADDR_HSIZE_SHIFT)
1da177e4	58
e8e54d3c JP	59	int addrconf_init(void);
e8e54d3c JP	60	void addrconf_cleanup(void);
1da177e4	61
e8e54d3c JP	62	int addrconf_add_ifaddr(struct net net, void __user arg);
	63	int addrconf_del_ifaddr(struct net net, void __user arg);
	64	int addrconf_set_dstaddr(struct net net, void __user arg);
1da177e4	65
e8e54d3c JP	66	int ipv6_chk_addr(struct net net, const struct in6_addr addr,
e8e54d3c JP	67	const struct net_device *dev, int strict);
c58da4c6 EK	68	int ipv6_chk_addr_and_flags(struct net net, const struct in6_addr addr,
	69	const struct net_device *dev, int strict,
	70	u32 banned_flags);
bfeade08	71
59fbb3a6	72	#if defined(CONFIG_IPV6_MIP6) \|\| defined(CONFIG_IPV6_MIP6_MODULE)
e8e54d3c	73	int ipv6_chk_home_addr(struct net net, const struct in6_addr addr);
65d4ed92	74	#endif
52eeeb84	75
7df37ff3 CB	76	bool ipv6_chk_custom_prefix(const struct in6_addr *addr,
	77	const unsigned int prefix_len,
	78	struct net_device *dev);
	79
e8e54d3c JP	80	int ipv6_chk_prefix(const struct in6_addr addr, struct net_device dev);
	81
	82	struct inet6_ifaddr ipv6_get_ifaddr(struct net net,
	83	const struct in6_addr *addr,
	84	struct net_device *dev, int strict);
	85
	86	int ipv6_dev_get_saddr(struct net net, const struct net_device dev,
	87	const struct in6_addr *daddr, unsigned int srcprefs,
	88	struct in6_addr *saddr);
	89	int __ipv6_get_lladdr(struct inet6_dev idev, struct in6_addr addr,
479840ff	90	u32 banned_flags);
e8e54d3c	91	int ipv6_get_lladdr(struct net_device dev, struct in6_addr addr,
479840ff	92	u32 banned_flags);
fe38d2a1	93	int inet_rcv_saddr_equal(const struct sock sk, const struct sock sk2,
e32ea7e7	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
4d6f2859 YS	108	static inline void addrconf_addr_eui48_base(u8 eui, const char const addr)
	109	{
	110	memcpy(eui, addr, 3);
	111	eui[3] = 0xFF;
	112	eui[4] = 0xFE;
	113	memcpy(eui + 5, addr + 3, 3);
	114	}
	115
	116	static inline void addrconf_addr_eui48(u8 eui, const char const addr)
	117	{
	118	addrconf_addr_eui48_base(eui, addr);
	119	eui[0] ^= 2;
	120	}
	121
399e6f95 MB	122	static inline int addrconf_ifid_eui48(u8 eui, struct net_device dev)
	123	{
	124	if (dev->addr_len != ETH_ALEN)
	125	return -1;
399e6f95 MB	126
	127	/*
	128	* The zSeries OSA network cards can be shared among various
	129	* OS instances, but the OSA cards have only one MAC address.
	130	* This leads to duplicate address conflicts in conjunction
	131	* with IPv6 if more than one instance uses the same card.
	132	*
	133	* The driver for these cards can deliver a unique 16-bit
	134	* identifier for each instance sharing the same card. It is
	135	* placed instead of 0xFFFE in the interface identifier. The
	136	* "u" bit of the interface identifier is not inverted in this
	137	* case. Hence the resulting interface identifier has local
	138	* scope according to RFC2373.
	139	*/
4d6f2859 YS	140
	141	addrconf_addr_eui48_base(eui, dev->dev_addr);
	142
399e6f95 MB	143	if (dev->dev_id) {
	144	eui[3] = (dev->dev_id >> 8) & 0xFF;
	145	eui[4] = dev->dev_id & 0xFF;
	146	} else {
399e6f95 MB	147	eui[0] ^= 2;
399e6f95 MB	148	}
4d6f2859	149
399e6f95 MB	150	return 0;
	151	}
	152
4bed72e4	153	static inline unsigned long addrconf_timeout_fixup(u32 timeout,
95c96174	154	unsigned int unit)
4bed72e4 YH	155	{
	156	if (timeout == 0xffffffff)
	157	return ~0UL;
	158
	159	/*
	160	* Avoid arithmetic overflow.
	161	* Assuming unit is constant and non-zero, this "if" statement
	162	* will go away on 64bit archs.
	163	*/
	164	if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
	165	return LONG_MAX / unit;
	166
	167	return timeout;
	168	}
	169
	170	static inline int addrconf_finite_timeout(unsigned long timeout)
	171	{
	172	return ~timeout;
	173	}
	174
2a8cc6c8 YH	175	/*
	176	* IPv6 Address Label subsystem (addrlabel.c)
	177	*/
e8e54d3c JP	178	int ipv6_addr_label_init(void);
	179	void ipv6_addr_label_cleanup(void);
	180	void ipv6_addr_label_rtnl_register(void);
	181	u32 ipv6_addr_label(struct net net, const struct in6_addr addr,
	182	int type, int ifindex);
2a8cc6c8	183
1da177e4 LT	184	/*
	185	* multicast prototypes (mcast.c)
	186	*/
e8e54d3c JP	187	int ipv6_sock_mc_join(struct sock *sk, int ifindex,
	188	const struct in6_addr *addr);
	189	int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
	190	const struct in6_addr *addr);
8651be8f	191	void __ipv6_sock_mc_close(struct sock *sk);
e8e54d3c JP	192	void ipv6_sock_mc_close(struct sock *sk);
	193	bool inet6_mc_check(struct sock sk, const struct in6_addr mc_addr,
	194	const struct in6_addr *src_addr);
	195
	196	int ipv6_dev_mc_inc(struct net_device dev, const struct in6_addr addr);
	197	int __ipv6_dev_mc_dec(struct inet6_dev idev, const struct in6_addr addr);
	198	int ipv6_dev_mc_dec(struct net_device dev, const struct in6_addr addr);
	199	void ipv6_mc_up(struct inet6_dev *idev);
	200	void ipv6_mc_down(struct inet6_dev *idev);
	201	void ipv6_mc_unmap(struct inet6_dev *idev);
	202	void ipv6_mc_remap(struct inet6_dev *idev);
	203	void ipv6_mc_init_dev(struct inet6_dev *idev);
	204	void ipv6_mc_destroy_dev(struct inet6_dev *idev);
9afd85c9	205	int ipv6_mc_check_mld(struct sk_buff skb, struct sk_buff *skb_trimmed);
e8e54d3c JP	206	void addrconf_dad_failure(struct inet6_ifaddr *ifp);
	207
	208	bool ipv6_chk_mcast_addr(struct net_device dev, const struct in6_addr group,
	209	const struct in6_addr *src_addr);
	210
	211	void ipv6_mc_dad_complete(struct inet6_dev *idev);
5f81bd2e CW	212
	213	/* A stub used by vxlan module. This is ugly, ideally these
	214	* symbols should be built into the core kernel.
	215	*/
	216	struct ipv6_stub {
	217	int (ipv6_sock_mc_join)(struct sock sk, int ifindex,
	218	const struct in6_addr *addr);
	219	int (ipv6_sock_mc_drop)(struct sock sk, int ifindex,
	220	const struct in6_addr *addr);
343d60aa RP	221	int (ipv6_dst_lookup)(struct net net, struct sock *sk,
343d60aa RP	222	struct dst_entry *dst, struct flowi6 fl6);
5f81bd2e	223	void (*udpv6_encap_enable)(void);
38cf595b	224	void (ndisc_send_na)(struct net_device dev, const struct in6_addr *daddr,
f564f45c CW	225	const struct in6_addr *solicited_addr,
f564f45c CW	226	bool router, bool solicited, bool override, bool inc_opt);
e15a00aa	227	struct neigh_table *nd_tbl;
5f81bd2e CW	228	};
	229	extern const struct ipv6_stub *ipv6_stub __read_mostly;
	230
daad1512 YH	231	/*
	232	* identify MLD packets for MLD filter exceptions
	233	*/
	234	static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
	235	{
	236	struct icmp6hdr *hdr;
	237
	238	if (nexthdr != IPPROTO_ICMPV6 \|\|
	239	!pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
	240	return false;
	241
	242	hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);
	243
	244	switch (hdr->icmp6_type) {
	245	case ICMPV6_MGM_QUERY:
	246	case ICMPV6_MGM_REPORT:
	247	case ICMPV6_MGM_REDUCTION:
	248	case ICMPV6_MLD2_REPORT:
	249	return true;
	250	default:
	251	break;
	252	}
	253	return false;
	254	}
1da177e4	255
e8e54d3c JP	256	void addrconf_prefix_rcv(struct net_device *dev,
e8e54d3c JP	257	u8 *opt, int len, bool sllao);
1da177e4	258
1da177e4 LT	259	/*
	260	* anycast prototypes (anycast.c)
	261	*/
e8e54d3c JP	262	int ipv6_sock_ac_join(struct sock *sk, int ifindex,
	263	const struct in6_addr *addr);
	264	int ipv6_sock_ac_drop(struct sock *sk, int ifindex,
	265	const struct in6_addr *addr);
	266	void ipv6_sock_ac_close(struct sock *sk);
	267
013b4d90	268	int __ipv6_dev_ac_inc(struct inet6_dev idev, const struct in6_addr addr);
e8e54d3c	269	int __ipv6_dev_ac_dec(struct inet6_dev idev, const struct in6_addr addr);
381f4dca	270	void ipv6_ac_destroy_dev(struct inet6_dev *idev);
e8e54d3c	271	bool ipv6_chk_acast_addr(struct net net, struct net_device dev,
7c90cc2d FLB	272	const struct in6_addr *addr);
	273	bool ipv6_chk_acast_addr_src(struct net net, struct net_device dev,
	274	const struct in6_addr *addr);
1da177e4 LT	275
1da177e4 LT	276	/* Device notifier */
e8e54d3c JP	277	int register_inet6addr_notifier(struct notifier_block *nb);
	278	int unregister_inet6addr_notifier(struct notifier_block *nb);
	279	int inet6addr_notifier_call_chain(unsigned long val, void *v);
1da177e4	280
85b3daad DA	281	void inet6_netconf_notify_devconf(struct net *net, int event, int type,
85b3daad DA	282	int ifindex, struct ipv6_devconf *devconf);
d67b8c61	283
48daa3bb ED	284	/**
	285	* __in6_dev_get - get inet6_dev pointer from netdevice
	286	* @dev: network device
	287	*
	288	* Caller must hold rcu_read_lock or RTNL, because this function
	289	* does not take a reference on the inet6_dev.
	290	*/
	291	static inline struct inet6_dev __in6_dev_get(const struct net_device dev)
1da177e4	292	{
48daa3bb	293	return rcu_dereference_rtnl(dev->ip6_ptr);
1da177e4 LT	294	}
1da177e4 LT	295
48daa3bb ED	296	/**
	297	* in6_dev_get - get inet6_dev pointer from netdevice
	298	* @dev: network device
	299	*
	300	* This version can be used in any context, and takes a reference
	301	* on the inet6_dev. Callers must use in6_dev_put() later to
	302	* release this reference.
	303	*/
	304	static inline struct inet6_dev in6_dev_get(const struct net_device dev)
1da177e4	305	{
48daa3bb ED	306	struct inet6_dev *idev;
48daa3bb ED	307
8814c4b5	308	rcu_read_lock();
48daa3bb	309	idev = rcu_dereference(dev->ip6_ptr);
1da177e4 LT	310	if (idev)
1da177e4 LT	311	atomic_inc(&idev->refcnt);
8814c4b5	312	rcu_read_unlock();
1da177e4 LT	313	return idev;
	314	}
	315
bba24896 JP	316	static inline struct neigh_parms __in6_dev_nd_parms_get_rcu(const struct net_device dev)
	317	{
	318	struct inet6_dev *idev = __in6_dev_get(dev);
	319
	320	return idev ? idev->nd_parms : NULL;
	321	}
	322
e8e54d3c	323	void in6_dev_finish_destroy(struct inet6_dev *idev);
1da177e4	324
48daa3bb	325	static inline void in6_dev_put(struct inet6_dev *idev)
1da177e4 LT	326	{
	327	if (atomic_dec_and_test(&idev->refcnt))
	328	in6_dev_finish_destroy(idev);
	329	}
	330
48daa3bb ED	331	static inline void __in6_dev_put(struct inet6_dev *idev)
	332	{
	333	atomic_dec(&idev->refcnt);
	334	}
1da177e4	335
48daa3bb ED	336	static inline void in6_dev_hold(struct inet6_dev *idev)
	337	{
	338	atomic_inc(&idev->refcnt);
	339	}
1da177e4	340
e8e54d3c	341	void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
1da177e4 LT	342
	343	static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
	344	{
	345	if (atomic_dec_and_test(&ifp->refcnt))
	346	inet6_ifa_finish_destroy(ifp);
	347	}
	348
48daa3bb ED	349	static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
	350	{
	351	atomic_dec(&ifp->refcnt);
	352	}
1da177e4	353
48daa3bb ED	354	static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
	355	{
	356	atomic_inc(&ifp->refcnt);
	357	}
1da177e4	358
1da177e4 LT	359
	360	/*
	361	* compute link-local solicited-node multicast address
	362	*/
	363
	364	static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
	365	struct in6_addr *solicited)
	366	{
	367	ipv6_addr_set(solicited,
0e7b8dcd YH	368	htonl(0xFF020000), 0,
	369	htonl(0x1),
	370	htonl(0xFF000000) \| addr->s6_addr32[3]);
1da177e4 LT	371	}
1da177e4 LT	372
b27b28cb	373	static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
1da177e4	374	{
d1641565	375	#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
bc861959	376	__be64 p = (__be64 )addr;
d1641565 YH	377	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) \| (p[1] ^ cpu_to_be64(1))) == 0UL;
d1641565 YH	378	#else
48daa3bb	379	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
fed85383	380	addr->s6_addr32[1] \| addr->s6_addr32[2] \|
48daa3bb	381	(addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
d1641565	382	#endif
1da177e4 LT	383	}
1da177e4 LT	384
b27b28cb	385	static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
1da177e4	386	{
d1641565	387	#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
bc861959	388	__be64 p = (__be64 )addr;
d1641565 YH	389	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) \| (p[1] ^ cpu_to_be64(2))) == 0UL;
d1641565 YH	390	#else
48daa3bb	391	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
fed85383	392	addr->s6_addr32[1] \| addr->s6_addr32[2] \|
48daa3bb	393	(addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
d1641565	394	#endif
1da177e4 LT	395	}
1da177e4 LT	396
b27b28cb	397	static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
c7dc89c0	398	{
48daa3bb	399	return (addr->s6_addr32[2] \| htonl(0x02000000)) == htonl(0x02005EFE);
c7dc89c0 FT	400	}
c7dc89c0 FT	401
ca97a644 YH	402	static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
ca97a644 YH	403	{
9d100774	404	#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
bc861959	405	__be64 p = (__be64 )addr;
9d100774 YH	406	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) \|
	407	((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) &
	408	cpu_to_be64(0xffffffffff000000UL))) == 0UL;
	409	#else
	410	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
	411	addr->s6_addr32[1] \|
	412	(addr->s6_addr32[2] ^ htonl(0x00000001)) \|
	413	(addr->s6_addr[12] ^ 0xff)) == 0;
	414	#endif
ca97a644 YH	415	}
ca97a644 YH	416
20380731	417	#ifdef CONFIG_PROC_FS
e8e54d3c JP	418	int if6_proc_init(void);
e8e54d3c JP	419	void if6_proc_exit(void);
20380731 ACM	420	#endif
20380731 ACM	421
1da177e4	422	#endif