[linux-block.git] / include / net / addrconf.h

/* SPDX-License-Identifier: GPL-2.0 */
#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;

	union __packed {
		__u8		flags;
		struct __packed {
#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;
};

/* rfc4861 4.6.2: IPv6 PIO is 32 bytes in size */
static_assert(sizeof(struct prefix_info) == 32);

#include <linux/ipv6.h>
#include <linux/netdevice.h>
#include <net/if_inet6.h>
#include <net/ipv6.h>

struct in6_validator_info {
	struct in6_addr		i6vi_addr;
	struct inet6_dev	*i6vi_dev;
	struct netlink_ext_ack	*extack;
};

struct ifa6_config {
	const struct in6_addr	*pfx;
	unsigned int		plen;

	u8			ifa_proto;

	const struct in6_addr	*peer_pfx;

	u32			rt_priority;
	u32			ifa_flags;
	u32			preferred_lft;
	u32			valid_lft;
	u16			scope;
};

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, bool skip_dev_check,
			    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

int ipv6_chk_rpl_srh_loop(struct net *net, const struct in6_addr *segs,
			  unsigned char nsegs);

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 net_device *ipv6_dev_find(struct net *net, 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 net_device *dev, struct in6_addr *addr,
		    u32 banned_flags);
bool inet_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2,
			  bool match_wildcard);
bool inet_rcv_saddr_any(const struct sock *sk);
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);
int 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)
 */
static inline bool ipv6_mc_may_pull(struct sk_buff *skb,
				    unsigned int len)
{
	if (skb_transport_offset(skb) + ipv6_transport_len(skb) < len)
		return false;

	return pskb_may_pull(skb, len);
}

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(const 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);
void addrconf_dad_failure(struct sk_buff *skb, struct inet6_ifaddr *ifp);

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

void ipv6_mc_dad_complete(struct inet6_dev *idev);

/*
 * identify MLD packets for MLD filter exceptions
 */
static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
{
	struct icmp6hdr *hdr;

	if (nexthdr != IPPROTO_ICMPV6 ||
	    !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
		return false;

	hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);

	switch (hdr->icmp6_type) {
	case ICMPV6_MGM_QUERY:
	case ICMPV6_MGM_REPORT:
	case ICMPV6_MGM_REDUCTION:
	case ICMPV6_MLD2_REPORT:
		return true;
	default:
		break;
	}
	return false;
}

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

/*
 *	anycast prototypes (anycast.c)
 */
int ipv6_sock_ac_join(struct sock *sk, int ifindex,
		      const struct in6_addr *addr);
int ipv6_sock_ac_drop(struct sock *sk, int ifindex,
		      const struct in6_addr *addr);
void __ipv6_sock_ac_close(struct sock *sk);
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);
int ipv6_anycast_init(void);
void ipv6_anycast_cleanup(void);

/* 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);

int register_inet6addr_validator_notifier(struct notifier_block *nb);
int unregister_inet6addr_validator_notifier(struct notifier_block *nb);
int inet6addr_validator_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_stats_get - get inet6_dev pointer for stats
 * @dev: network device
 * @skb: skb for original incoming interface if neeeded
 *
 * 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_stats_get(const struct net_device *dev,
						    const struct sk_buff *skb)
{
	if (netif_is_l3_master(dev))
		dev = dev_get_by_index_rcu(dev_net(dev), inet6_iif(skb));
	return __in6_dev_get(dev);
}

/**
 * __in6_dev_get_safely - get inet6_dev pointer from netdevice
 * @dev: network device
 *
 * This is a safer version of __in6_dev_get
 */
static inline struct inet6_dev *__in6_dev_get_safely(const struct net_device *dev)
{
	if (likely(dev))
		return rcu_dereference_rtnl(dev->ip6_ptr);
	else
		return NULL;
}

/**
 * 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)
		refcount_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 (refcount_dec_and_test(&idev->refcnt))
		in6_dev_finish_destroy(idev);
}

static inline void in6_dev_put_clear(struct inet6_dev **pidev)
{
	struct inet6_dev *idev = *pidev;

	if (idev) {
		in6_dev_put(idev);
		*pidev = NULL;
	}
}

static inline void __in6_dev_put(struct inet6_dev *idev)
{
	refcount_dec(&idev->refcnt);
}

static inline void in6_dev_hold(struct inet6_dev *idev)
{
	refcount_inc(&idev->refcnt);
}

/* called with rcu_read_lock held */
static inline bool ip6_ignore_linkdown(const struct net_device *dev)
{
	const struct inet6_dev *idev = __in6_dev_get(dev);

	if (unlikely(!idev))
		return true;

	return !!idev->cnf.ignore_routes_with_linkdown;
}

void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);

static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
{
	if (refcount_dec_and_test(&ifp->refcnt))
		inet6_ifa_finish_destroy(ifp);
}

static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
{
	refcount_dec(&ifp->refcnt);
}

static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
{
	refcount_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 = (__force __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 = (__force __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 = (__force __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
}

static inline bool ipv6_addr_is_all_snoopers(const struct in6_addr *addr)
{
#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
	__be64 *p = (__force __be64 *)addr;

	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) |
		(p[1] ^ cpu_to_be64(0x6a))) == 0UL;
#else
	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
		addr->s6_addr32[1] | addr->s6_addr32[2] |
		(addr->s6_addr32[3] ^ htonl(0x0000006a))) == 0;
#endif
}

#ifdef CONFIG_PROC_FS
int if6_proc_init(void);
void if6_proc_exit(void);
#endif

#endif
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4 LT	2	#ifndef _ADDRCONF_H
	3	#define _ADDRCONF_H
	4
bd11f074	5	#define MAX_RTR_SOLICITATIONS -1 /* unlimited */
1da177e4	6	#define RTR_SOLICITATION_INTERVAL (4*HZ)
bd11f074	7	#define RTR_SOLICITATION_MAX_INTERVAL (3600HZ) / 1 hour */
1da177e4	8
36268983 GN	9	#define MIN_VALID_LIFETIME (23600) / 2 hours */
36268983 GN	10
1da177e4 LT	11	#define TEMP_VALID_LIFETIME (7*86400)
1da177e4 LT	12	#define TEMP_PREFERRED_LIFETIME (86400)
76f793e3	13	#define REGEN_MAX_RETRY (3)
1da177e4 LT	14	#define MAX_DESYNC_FACTOR (600)
	15
	16	#define ADDR_CHECK_FREQUENCY (120*HZ)
	17
	18	#define IPV6_MAX_ADDRESSES 16
	19
5c766d64 JP	20	#define ADDRCONF_TIMER_FUZZ_MINUS (HZ > 50 ? HZ / 50 : 1)
	21	#define ADDRCONF_TIMER_FUZZ (HZ / 4)
	22	#define ADDRCONF_TIMER_FUZZ_MAX (HZ)
	23
242d3a49 WC	24	#define ADDRCONF_NOTIFY_PRIORITY 0
242d3a49 WC	25
c7dc89c0	26	#include <linux/in.h>
6a800d45 PM	27	#include <linux/in6.h>
6a800d45 PM	28
1da177e4 LT	29	struct prefix_info {
	30	__u8 type;
	31	__u8 length;
	32	__u8 prefix_len;
	33
bd4a8167 MŻ	34	union __packed {
	35	__u8 flags;
	36	struct __packed {
1da177e4	37	#if defined(__BIG_ENDIAN_BITFIELD)
bd4a8167	38	__u8 onlink : 1,
1da177e4 LT	39	autoconf : 1,
	40	reserved : 6;
	41	#elif defined(__LITTLE_ENDIAN_BITFIELD)
bd4a8167	42	__u8 reserved : 6,
1da177e4 LT	43	autoconf : 1,
	44	onlink : 1;
	45	#else
	46	#error "Please fix <asm/byteorder.h>"
	47	#endif
bd4a8167 MŻ	48	};
bd4a8167 MŻ	49	};
e69a4adc AV	50	__be32 valid;
	51	__be32 prefered;
	52	__be32 reserved2;
1da177e4 LT	53
	54	struct in6_addr prefix;
	55	};
	56
bd4a8167 MŻ	57	/* rfc4861 4.6.2: IPv6 PIO is 32 bytes in size */
	58	static_assert(sizeof(struct prefix_info) == 32);
	59
ba5ea614	60	#include <linux/ipv6.h>
1da177e4 LT	61	#include <linux/netdevice.h>
1da177e4 LT	62	#include <net/if_inet6.h>
e4553edd	63	#include <net/ipv6.h>
1da177e4	64
3ad7d246 KJ	65	struct in6_validator_info {
	66	struct in6_addr i6vi_addr;
	67	struct inet6_dev *i6vi_dev;
de95e047	68	struct netlink_ext_ack *extack;
3ad7d246 KJ	69	};
3ad7d246 KJ	70
e6464b8c DA	71	struct ifa6_config {
	72	const struct in6_addr *pfx;
	73	unsigned int plen;
	74
47f0bd50 JL	75	u8 ifa_proto;
47f0bd50 JL	76
e6464b8c DA	77	const struct in6_addr *peer_pfx;
e6464b8c DA	78
8308f3ff	79	u32 rt_priority;
e6464b8c DA	80	u32 ifa_flags;
	81	u32 preferred_lft;
	82	u32 valid_lft;
	83	u16 scope;
	84	};
	85
e8e54d3c JP	86	int addrconf_init(void);
e8e54d3c JP	87	void addrconf_cleanup(void);
1da177e4	88
e8e54d3c JP	89	int addrconf_add_ifaddr(struct net net, void __user arg);
	90	int addrconf_del_ifaddr(struct net net, void __user arg);
	91	int addrconf_set_dstaddr(struct net net, void __user arg);
1da177e4	92
e8e54d3c JP	93	int ipv6_chk_addr(struct net net, const struct in6_addr addr,
e8e54d3c JP	94	const struct net_device *dev, int strict);
c58da4c6	95	int ipv6_chk_addr_and_flags(struct net net, const struct in6_addr addr,
232378e8 DA	96	const struct net_device *dev, bool skip_dev_check,
232378e8 DA	97	int strict, u32 banned_flags);
bfeade08	98
59fbb3a6	99	#if defined(CONFIG_IPV6_MIP6) \|\| defined(CONFIG_IPV6_MIP6_MODULE)
e8e54d3c	100	int ipv6_chk_home_addr(struct net net, const struct in6_addr addr);
65d4ed92	101	#endif
52eeeb84	102
f37c6059 AA	103	int ipv6_chk_rpl_srh_loop(struct net net, const struct in6_addr segs,
	104	unsigned char nsegs);
	105
7df37ff3 CB	106	bool ipv6_chk_custom_prefix(const struct in6_addr *addr,
	107	const unsigned int prefix_len,
	108	struct net_device *dev);
	109
e8e54d3c JP	110	int ipv6_chk_prefix(const struct in6_addr addr, struct net_device dev);
e8e54d3c JP	111
4ef1a7cb XL	112	struct net_device ipv6_dev_find(struct net net, const struct in6_addr *addr,
4ef1a7cb XL	113	struct net_device *dev);
81f6cb31	114
e8e54d3c JP	115	struct inet6_ifaddr ipv6_get_ifaddr(struct net net,
	116	const struct in6_addr *addr,
	117	struct net_device *dev, int strict);
	118
	119	int ipv6_dev_get_saddr(struct net net, const struct net_device dev,
	120	const struct in6_addr *daddr, unsigned int srcprefs,
	121	struct in6_addr *saddr);
e8e54d3c	122	int ipv6_get_lladdr(struct net_device dev, struct in6_addr addr,
479840ff	123	u32 banned_flags);
7016e062 JP	124	bool inet_rcv_saddr_equal(const struct sock sk, const struct sock sk2,
7016e062 JP	125	bool match_wildcard);
2dbb9b9e	126	bool inet_rcv_saddr_any(const struct sock *sk);
e8e54d3c JP	127	void addrconf_join_solict(struct net_device dev, const struct in6_addr addr);
e8e54d3c JP	128	void addrconf_leave_solict(struct inet6_dev idev, const struct in6_addr addr);
1da177e4	129
2ad3ed59 AA	130	void addrconf_add_linklocal(struct inet6_dev *idev,
	131	const struct in6_addr *addr, u32 flags);
	132
cc84b3c6 AA	133	int addrconf_prefix_rcv_add_addr(struct net net, struct net_device dev,
	134	const struct prefix_info *pinfo,
	135	struct inet6_dev *in6_dev,
	136	const struct in6_addr *addr, int addr_type,
	137	u32 addr_flags, bool sllao, bool tokenized,
	138	__u32 valid_lft, u32 prefered_lft);
	139
4d6f2859 YS	140	static inline void addrconf_addr_eui48_base(u8 eui, const char const addr)
	141	{
	142	memcpy(eui, addr, 3);
	143	eui[3] = 0xFF;
	144	eui[4] = 0xFE;
	145	memcpy(eui + 5, addr + 3, 3);
	146	}
	147
	148	static inline void addrconf_addr_eui48(u8 eui, const char const addr)
	149	{
	150	addrconf_addr_eui48_base(eui, addr);
	151	eui[0] ^= 2;
	152	}
	153
399e6f95 MB	154	static inline int addrconf_ifid_eui48(u8 eui, struct net_device dev)
	155	{
	156	if (dev->addr_len != ETH_ALEN)
	157	return -1;
399e6f95 MB	158
	159	/*
	160	* The zSeries OSA network cards can be shared among various
	161	* OS instances, but the OSA cards have only one MAC address.
	162	* This leads to duplicate address conflicts in conjunction
	163	* with IPv6 if more than one instance uses the same card.
	164	*
	165	* The driver for these cards can deliver a unique 16-bit
	166	* identifier for each instance sharing the same card. It is
	167	* placed instead of 0xFFFE in the interface identifier. The
	168	* "u" bit of the interface identifier is not inverted in this
	169	* case. Hence the resulting interface identifier has local
	170	* scope according to RFC2373.
	171	*/
4d6f2859 YS	172
	173	addrconf_addr_eui48_base(eui, dev->dev_addr);
	174
399e6f95 MB	175	if (dev->dev_id) {
	176	eui[3] = (dev->dev_id >> 8) & 0xFF;
	177	eui[4] = dev->dev_id & 0xFF;
	178	} else {
399e6f95 MB	179	eui[0] ^= 2;
399e6f95 MB	180	}
4d6f2859	181
399e6f95 MB	182	return 0;
	183	}
	184
4bed72e4	185	static inline unsigned long addrconf_timeout_fixup(u32 timeout,
95c96174	186	unsigned int unit)
4bed72e4 YH	187	{
	188	if (timeout == 0xffffffff)
	189	return ~0UL;
	190
	191	/*
	192	* Avoid arithmetic overflow.
	193	* Assuming unit is constant and non-zero, this "if" statement
	194	* will go away on 64bit archs.
	195	*/
	196	if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
	197	return LONG_MAX / unit;
	198
	199	return timeout;
	200	}
	201
	202	static inline int addrconf_finite_timeout(unsigned long timeout)
	203	{
	204	return ~timeout;
	205	}
	206
2a8cc6c8 YH	207	/*
	208	* IPv6 Address Label subsystem (addrlabel.c)
	209	*/
e8e54d3c JP	210	int ipv6_addr_label_init(void);
e8e54d3c JP	211	void ipv6_addr_label_cleanup(void);
a3fde2ad	212	int ipv6_addr_label_rtnl_register(void);
e8e54d3c JP	213	u32 ipv6_addr_label(struct net net, const struct in6_addr addr,
e8e54d3c JP	214	int type, int ifindex);
2a8cc6c8	215
1da177e4 LT	216	/*
	217	* multicast prototypes (mcast.c)
	218	*/
32890862 DM	219	static inline bool ipv6_mc_may_pull(struct sk_buff *skb,
32890862 DM	220	unsigned int len)
ba5ea614 LL	221	{
ba5ea614 LL	222	if (skb_transport_offset(skb) + ipv6_transport_len(skb) < len)
32890862	223	return false;
ba5ea614 LL	224
	225	return pskb_may_pull(skb, len);
	226	}
	227
e8e54d3c JP	228	int ipv6_sock_mc_join(struct sock *sk, int ifindex,
	229	const struct in6_addr *addr);
	230	int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
	231	const struct in6_addr *addr);
8651be8f	232	void __ipv6_sock_mc_close(struct sock *sk);
e8e54d3c	233	void ipv6_sock_mc_close(struct sock *sk);
66eb554c	234	bool inet6_mc_check(const struct sock sk, const struct in6_addr mc_addr,
e8e54d3c JP	235	const struct in6_addr *src_addr);
	236
	237	int ipv6_dev_mc_inc(struct net_device dev, const struct in6_addr addr);
	238	int __ipv6_dev_mc_dec(struct inet6_dev idev, const struct in6_addr addr);
	239	int ipv6_dev_mc_dec(struct net_device dev, const struct in6_addr addr);
	240	void ipv6_mc_up(struct inet6_dev *idev);
	241	void ipv6_mc_down(struct inet6_dev *idev);
	242	void ipv6_mc_unmap(struct inet6_dev *idev);
	243	void ipv6_mc_remap(struct inet6_dev *idev);
	244	void ipv6_mc_init_dev(struct inet6_dev *idev);
	245	void ipv6_mc_destroy_dev(struct inet6_dev *idev);
ba5ea614	246	int ipv6_mc_check_mld(struct sk_buff *skb);
da13c59b	247	void addrconf_dad_failure(struct sk_buff skb, struct inet6_ifaddr ifp);
e8e54d3c JP	248
	249	bool ipv6_chk_mcast_addr(struct net_device dev, const struct in6_addr group,
	250	const struct in6_addr *src_addr);
	251
	252	void ipv6_mc_dad_complete(struct inet6_dev *idev);
5f81bd2e	253
daad1512 YH	254	/*
	255	* identify MLD packets for MLD filter exceptions
	256	*/
	257	static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
	258	{
	259	struct icmp6hdr *hdr;
	260
	261	if (nexthdr != IPPROTO_ICMPV6 \|\|
	262	!pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
	263	return false;
	264
	265	hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);
	266
	267	switch (hdr->icmp6_type) {
	268	case ICMPV6_MGM_QUERY:
	269	case ICMPV6_MGM_REPORT:
	270	case ICMPV6_MGM_REDUCTION:
	271	case ICMPV6_MLD2_REPORT:
	272	return true;
	273	default:
	274	break;
	275	}
	276	return false;
	277	}
1da177e4	278
e8e54d3c JP	279	void addrconf_prefix_rcv(struct net_device *dev,
e8e54d3c JP	280	u8 *opt, int len, bool sllao);
1da177e4	281
1da177e4 LT	282	/*
	283	* anycast prototypes (anycast.c)
	284	*/
e8e54d3c JP	285	int ipv6_sock_ac_join(struct sock *sk, int ifindex,
	286	const struct in6_addr *addr);
	287	int ipv6_sock_ac_drop(struct sock *sk, int ifindex,
	288	const struct in6_addr *addr);
8c0de6e9	289	void __ipv6_sock_ac_close(struct sock *sk);
e8e54d3c JP	290	void ipv6_sock_ac_close(struct sock *sk);
e8e54d3c JP	291
013b4d90	292	int __ipv6_dev_ac_inc(struct inet6_dev idev, const struct in6_addr addr);
e8e54d3c	293	int __ipv6_dev_ac_dec(struct inet6_dev idev, const struct in6_addr addr);
381f4dca	294	void ipv6_ac_destroy_dev(struct inet6_dev *idev);
e8e54d3c	295	bool ipv6_chk_acast_addr(struct net net, struct net_device dev,
7c90cc2d FLB	296	const struct in6_addr *addr);
	297	bool ipv6_chk_acast_addr_src(struct net net, struct net_device dev,
	298	const struct in6_addr *addr);
2384d025 JB	299	int ipv6_anycast_init(void);
2384d025 JB	300	void ipv6_anycast_cleanup(void);
1da177e4 LT	301
1da177e4 LT	302	/* Device notifier */
e8e54d3c JP	303	int register_inet6addr_notifier(struct notifier_block *nb);
	304	int unregister_inet6addr_notifier(struct notifier_block *nb);
	305	int inet6addr_notifier_call_chain(unsigned long val, void *v);
1da177e4	306
3ad7d246 KJ	307	int register_inet6addr_validator_notifier(struct notifier_block *nb);
	308	int unregister_inet6addr_validator_notifier(struct notifier_block *nb);
	309	int inet6addr_validator_notifier_call_chain(unsigned long val, void *v);
	310
85b3daad DA	311	void inet6_netconf_notify_devconf(struct net *net, int event, int type,
85b3daad DA	312	int ifindex, struct ipv6_devconf *devconf);
d67b8c61	313
48daa3bb ED	314	/**
	315	* __in6_dev_get - get inet6_dev pointer from netdevice
	316	* @dev: network device
	317	*
	318	* Caller must hold rcu_read_lock or RTNL, because this function
	319	* does not take a reference on the inet6_dev.
	320	*/
	321	static inline struct inet6_dev __in6_dev_get(const struct net_device dev)
1da177e4	322	{
48daa3bb	323	return rcu_dereference_rtnl(dev->ip6_ptr);
1da177e4 LT	324	}
1da177e4 LT	325
e1ae5c2e SS	326	/**
	327	* __in6_dev_stats_get - get inet6_dev pointer for stats
	328	* @dev: network device
	329	* @skb: skb for original incoming interface if neeeded
	330	*
	331	* Caller must hold rcu_read_lock or RTNL, because this function
	332	* does not take a reference on the inet6_dev.
	333	*/
	334	static inline struct inet6_dev __in6_dev_stats_get(const struct net_device dev,
	335	const struct sk_buff *skb)
	336	{
	337	if (netif_is_l3_master(dev))
	338	dev = dev_get_by_index_rcu(dev_net(dev), inet6_iif(skb));
	339	return __in6_dev_get(dev);
	340	}
	341
bdb7cc64 SS	342	/**
	343	* __in6_dev_get_safely - get inet6_dev pointer from netdevice
	344	* @dev: network device
	345	*
	346	* This is a safer version of __in6_dev_get
	347	*/
	348	static inline struct inet6_dev __in6_dev_get_safely(const struct net_device dev)
	349	{
	350	if (likely(dev))
	351	return rcu_dereference_rtnl(dev->ip6_ptr);
	352	else
	353	return NULL;
	354	}
	355
48daa3bb ED	356	/**
	357	* in6_dev_get - get inet6_dev pointer from netdevice
	358	* @dev: network device
	359	*
	360	* This version can be used in any context, and takes a reference
	361	* on the inet6_dev. Callers must use in6_dev_put() later to
	362	* release this reference.
	363	*/
	364	static inline struct inet6_dev in6_dev_get(const struct net_device dev)
1da177e4	365	{
48daa3bb ED	366	struct inet6_dev *idev;
48daa3bb ED	367
8814c4b5	368	rcu_read_lock();
48daa3bb	369	idev = rcu_dereference(dev->ip6_ptr);
1da177e4	370	if (idev)
1be92460	371	refcount_inc(&idev->refcnt);
8814c4b5	372	rcu_read_unlock();
1da177e4 LT	373	return idev;
	374	}
	375
bba24896 JP	376	static inline struct neigh_parms __in6_dev_nd_parms_get_rcu(const struct net_device dev)
	377	{
	378	struct inet6_dev *idev = __in6_dev_get(dev);
	379
	380	return idev ? idev->nd_parms : NULL;
	381	}
	382
e8e54d3c	383	void in6_dev_finish_destroy(struct inet6_dev *idev);
1da177e4	384
48daa3bb	385	static inline void in6_dev_put(struct inet6_dev *idev)
1da177e4	386	{
1be92460	387	if (refcount_dec_and_test(&idev->refcnt))
1da177e4 LT	388	in6_dev_finish_destroy(idev);
	389	}
	390
12d94a80 ED	391	static inline void in6_dev_put_clear(struct inet6_dev **pidev)
	392	{
	393	struct inet6_dev idev = pidev;
	394
	395	if (idev) {
	396	in6_dev_put(idev);
	397	*pidev = NULL;
	398	}
	399	}
	400
48daa3bb ED	401	static inline void __in6_dev_put(struct inet6_dev *idev)
48daa3bb ED	402	{
1be92460	403	refcount_dec(&idev->refcnt);
48daa3bb	404	}
1da177e4	405
48daa3bb ED	406	static inline void in6_dev_hold(struct inet6_dev *idev)
48daa3bb ED	407	{
1be92460	408	refcount_inc(&idev->refcnt);
48daa3bb	409	}
1da177e4	410
6d3d07b4 DA	411	/* called with rcu_read_lock held */
	412	static inline bool ip6_ignore_linkdown(const struct net_device *dev)
	413	{
	414	const struct inet6_dev *idev = __in6_dev_get(dev);
	415
85f0173d ZX	416	if (unlikely(!idev))
	417	return true;
	418
6d3d07b4 DA	419	return !!idev->cnf.ignore_routes_with_linkdown;
	420	}
	421
e8e54d3c	422	void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
1da177e4 LT	423
	424	static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
	425	{
271201c0	426	if (refcount_dec_and_test(&ifp->refcnt))
1da177e4 LT	427	inet6_ifa_finish_destroy(ifp);
	428	}
	429
48daa3bb ED	430	static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
48daa3bb ED	431	{
271201c0	432	refcount_dec(&ifp->refcnt);
48daa3bb	433	}
1da177e4	434
48daa3bb ED	435	static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
48daa3bb ED	436	{
271201c0	437	refcount_inc(&ifp->refcnt);
48daa3bb	438	}
1da177e4	439
1da177e4 LT	440
	441	/*
	442	* compute link-local solicited-node multicast address
	443	*/
	444
	445	static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
	446	struct in6_addr *solicited)
	447	{
	448	ipv6_addr_set(solicited,
0e7b8dcd YH	449	htonl(0xFF020000), 0,
	450	htonl(0x1),
	451	htonl(0xFF000000) \| addr->s6_addr32[3]);
1da177e4 LT	452	}
1da177e4 LT	453
b27b28cb	454	static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
1da177e4	455	{
d1641565	456	#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
54e1f08b	457	__be64 p = (__force __be64 )addr;
d1641565 YH	458	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) \| (p[1] ^ cpu_to_be64(1))) == 0UL;
d1641565 YH	459	#else
48daa3bb	460	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
fed85383	461	addr->s6_addr32[1] \| addr->s6_addr32[2] \|
48daa3bb	462	(addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
d1641565	463	#endif
1da177e4 LT	464	}
1da177e4 LT	465
b27b28cb	466	static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
1da177e4	467	{
d1641565	468	#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
54e1f08b	469	__be64 p = (__force __be64 )addr;
d1641565 YH	470	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) \| (p[1] ^ cpu_to_be64(2))) == 0UL;
d1641565 YH	471	#else
48daa3bb	472	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
fed85383	473	addr->s6_addr32[1] \| addr->s6_addr32[2] \|
48daa3bb	474	(addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
d1641565	475	#endif
1da177e4 LT	476	}
1da177e4 LT	477
b27b28cb	478	static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
c7dc89c0	479	{
48daa3bb	480	return (addr->s6_addr32[2] \| htonl(0x02000000)) == htonl(0x02005EFE);
c7dc89c0 FT	481	}
c7dc89c0 FT	482
ca97a644 YH	483	static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
ca97a644 YH	484	{
9d100774	485	#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
54e1f08b	486	__be64 p = (__force __be64 )addr;
9d100774 YH	487	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) \|
	488	((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) &
	489	cpu_to_be64(0xffffffffff000000UL))) == 0UL;
	490	#else
	491	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
	492	addr->s6_addr32[1] \|
	493	(addr->s6_addr32[2] ^ htonl(0x00000001)) \|
	494	(addr->s6_addr[12] ^ 0xff)) == 0;
	495	#endif
ca97a644 YH	496	}
ca97a644 YH	497
4b3087c7 LL	498	static inline bool ipv6_addr_is_all_snoopers(const struct in6_addr *addr)
	499	{
	500	#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
54e1f08b	501	__be64 p = (__force __be64 )addr;
4b3087c7 LL	502
	503	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) \|
	504	(p[1] ^ cpu_to_be64(0x6a))) == 0UL;
	505	#else
	506	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
	507	addr->s6_addr32[1] \| addr->s6_addr32[2] \|
	508	(addr->s6_addr32[3] ^ htonl(0x0000006a))) == 0;
	509	#endif
	510	}
	511
20380731	512	#ifdef CONFIG_PROC_FS
e8e54d3c JP	513	int if6_proc_init(void);
e8e54d3c JP	514	void if6_proc_exit(void);
20380731 ACM	515	#endif
20380731 ACM	516
1da177e4	517	#endif