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

#ifndef _ADDRCONF_H
#define _ADDRCONF_H

#define MAX_RTR_SOLICITATIONS		3
#define RTR_SOLICITATION_INTERVAL	(4*HZ)

#define MIN_VALID_LIFETIME		(2*3600)	/* 2 hours */

#define TEMP_VALID_LIFETIME		(7*86400)
#define TEMP_PREFERRED_LIFETIME		(86400)
#define REGEN_MAX_RETRY			(3)
#define MAX_DESYNC_FACTOR		(600)

#define ADDR_CHECK_FREQUENCY		(120*HZ)

#define IPV6_MAX_ADDRESSES		16

#define ADDRCONF_TIMER_FUZZ_MINUS	(HZ > 50 ? HZ / 50 : 1)
#define ADDRCONF_TIMER_FUZZ		(HZ / 4)
#define ADDRCONF_TIMER_FUZZ_MAX		(HZ)

#include <linux/in.h>
#include <linux/in6.h>

struct prefix_info {
	__u8			type;
	__u8			length;
	__u8			prefix_len;

#if defined(__BIG_ENDIAN_BITFIELD)
	__u8			onlink : 1,
			 	autoconf : 1,
				reserved : 6;
#elif defined(__LITTLE_ENDIAN_BITFIELD)
	__u8			reserved : 6,
				autoconf : 1,
				onlink : 1;
#else
#error "Please fix <asm/byteorder.h>"
#endif
	__be32			valid;
	__be32			prefered;
	__be32			reserved2;

	struct in6_addr		prefix;
};


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

#define IN6_ADDR_HSIZE_SHIFT	4
#define IN6_ADDR_HSIZE		(1 << IN6_ADDR_HSIZE_SHIFT)

int addrconf_init(void);
void addrconf_cleanup(void);

int addrconf_add_ifaddr(struct net *net, void __user *arg);
int addrconf_del_ifaddr(struct net *net, void __user *arg);
int addrconf_set_dstaddr(struct net *net, void __user *arg);

int ipv6_chk_addr(struct net *net, const struct in6_addr *addr,
		  const struct net_device *dev, int strict);
int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr,
			    const struct net_device *dev, int strict,
			    u32 banned_flags);

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

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

int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev);

struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net,
				     const struct in6_addr *addr,
				     struct net_device *dev, int strict);

int ipv6_dev_get_saddr(struct net *net, const struct net_device *dev,
		       const struct in6_addr *daddr, unsigned int srcprefs,
		       struct in6_addr *saddr);
int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr,
		      u32 banned_flags);
int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
		    u32 banned_flags);
int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2);
void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr);
void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr);

static inline int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
{
	if (dev->addr_len != ETH_ALEN)
		return -1;
	memcpy(eui, dev->dev_addr, 3);
	memcpy(eui + 5, dev->dev_addr + 3, 3);

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

static inline unsigned long addrconf_timeout_fixup(u32 timeout,
						   unsigned int unit)
{
	if (timeout == 0xffffffff)
		return ~0UL;

	/*
	 * Avoid arithmetic overflow.
	 * Assuming unit is constant and non-zero, this "if" statement
	 * will go away on 64bit archs.
	 */
	if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
		return LONG_MAX / unit;

	return timeout;
}

static inline int addrconf_finite_timeout(unsigned long timeout)
{
	return ~timeout;
}

/*
 *	IPv6 Address Label subsystem (addrlabel.c)
 */
int ipv6_addr_label_init(void);
void ipv6_addr_label_cleanup(void);
void ipv6_addr_label_rtnl_register(void);
u32 ipv6_addr_label(struct net *net, const struct in6_addr *addr,
		    int type, int ifindex);

/*
 *	multicast prototypes (mcast.c)
 */
int ipv6_sock_mc_join(struct sock *sk, int ifindex,
		      const struct in6_addr *addr);
int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
		      const struct in6_addr *addr);
void ipv6_sock_mc_close(struct sock *sk);
bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr,
		    const struct in6_addr *src_addr);

int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
void ipv6_mc_up(struct inet6_dev *idev);
void ipv6_mc_down(struct inet6_dev *idev);
void ipv6_mc_unmap(struct inet6_dev *idev);
void ipv6_mc_remap(struct inet6_dev *idev);
void ipv6_mc_init_dev(struct inet6_dev *idev);
void ipv6_mc_destroy_dev(struct inet6_dev *idev);
int ipv6_mc_check_mld(struct sk_buff *skb, struct sk_buff **skb_trimmed);
void addrconf_dad_failure(struct inet6_ifaddr *ifp);

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

void ipv6_mc_dad_complete(struct inet6_dev *idev);

/* A stub used by vxlan module. This is ugly, ideally these
 * symbols should be built into the core kernel.
 */
struct ipv6_stub {
	int (*ipv6_sock_mc_join)(struct sock *sk, int ifindex,
				 const struct in6_addr *addr);
	int (*ipv6_sock_mc_drop)(struct sock *sk, int ifindex,
				 const struct in6_addr *addr);
	int (*ipv6_dst_lookup)(struct net *net, struct sock *sk,
			       struct dst_entry **dst, struct flowi6 *fl6);
	void (*udpv6_encap_enable)(void);
	void (*ndisc_send_na)(struct net_device *dev, const struct in6_addr *daddr,
			      const struct in6_addr *solicited_addr,
			      bool router, bool solicited, bool override, bool inc_opt);
	struct neigh_table *nd_tbl;
};
extern const struct ipv6_stub *ipv6_stub __read_mostly;

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

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

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

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

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

/*
 *	anycast prototypes (anycast.c)
 */
int ipv6_sock_ac_join(struct sock *sk, int ifindex,
		      const struct in6_addr *addr);
int ipv6_sock_ac_drop(struct sock *sk, int ifindex,
		      const struct in6_addr *addr);
void ipv6_sock_ac_close(struct sock *sk);

int __ipv6_dev_ac_inc(struct inet6_dev *idev, const struct in6_addr *addr);
int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr);
void ipv6_ac_destroy_dev(struct inet6_dev *idev);
bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
			 const struct in6_addr *addr);
bool ipv6_chk_acast_addr_src(struct net *net, struct net_device *dev,
			     const struct in6_addr *addr);

/* Device notifier */
int register_inet6addr_notifier(struct notifier_block *nb);
int unregister_inet6addr_notifier(struct notifier_block *nb);
int inet6addr_notifier_call_chain(unsigned long val, void *v);

void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
				  struct ipv6_devconf *devconf);

/**
 * __in6_dev_get - get inet6_dev pointer from netdevice
 * @dev: network device
 *
 * Caller must hold rcu_read_lock or RTNL, because this function
 * does not take a reference on the inet6_dev.
 */
static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
{
	return rcu_dereference_rtnl(dev->ip6_ptr);
}

/**
 * in6_dev_get - get inet6_dev pointer from netdevice
 * @dev: network device
 *
 * This version can be used in any context, and takes a reference
 * on the inet6_dev. Callers must use in6_dev_put() later to
 * release this reference.
 */
static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
{
	struct inet6_dev *idev;

	rcu_read_lock();
	idev = rcu_dereference(dev->ip6_ptr);
	if (idev)
		atomic_inc(&idev->refcnt);
	rcu_read_unlock();
	return idev;
}

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

	return idev ? idev->nd_parms : NULL;
}

void in6_dev_finish_destroy(struct inet6_dev *idev);

static inline void in6_dev_put(struct inet6_dev *idev)
{
	if (atomic_dec_and_test(&idev->refcnt))
		in6_dev_finish_destroy(idev);
}

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

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

void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);

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

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

static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
{
	atomic_inc(&ifp->refcnt);
}


/*
 *	compute link-local solicited-node multicast address
 */

static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
					     struct in6_addr *solicited)
{
	ipv6_addr_set(solicited,
		      htonl(0xFF020000), 0,
		      htonl(0x1),
		      htonl(0xFF000000) | addr->s6_addr32[3]);
}

static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
{
#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
	__be64 *p = (__be64 *)addr;
	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL;
#else
	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
		addr->s6_addr32[1] | addr->s6_addr32[2] |
		(addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
#endif
}

static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
{
#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
	__be64 *p = (__be64 *)addr;
	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL;
#else
	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
		addr->s6_addr32[1] | addr->s6_addr32[2] |
		(addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
#endif
}

static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
{
	return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
}

static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
{
#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
	__be64 *p = (__be64 *)addr;
	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) |
		((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) &
		 cpu_to_be64(0xffffffffff000000UL))) == 0UL;
#else
	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
		addr->s6_addr32[1] |
		(addr->s6_addr32[2] ^ htonl(0x00000001)) |
		(addr->s6_addr[12] ^ 0xff)) == 0;
#endif
}

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

#endif
Commit	Line	Data
1da177e4 LT	1	#ifndef _ADDRCONF_H
	2	#define _ADDRCONF_H
	3
1da177e4 LT	4	#define MAX_RTR_SOLICITATIONS 3
	5	#define RTR_SOLICITATION_INTERVAL (4*HZ)
	6
	7	#define MIN_VALID_LIFETIME (23600) / 2 hours */
	8
	9	#define TEMP_VALID_LIFETIME (7*86400)
	10	#define TEMP_PREFERRED_LIFETIME (86400)
76f793e3	11	#define REGEN_MAX_RETRY (3)
1da177e4 LT	12	#define MAX_DESYNC_FACTOR (600)
	13
	14	#define ADDR_CHECK_FREQUENCY (120*HZ)
	15
	16	#define IPV6_MAX_ADDRESSES 16
	17
5c766d64 JP	18	#define ADDRCONF_TIMER_FUZZ_MINUS (HZ > 50 ? HZ / 50 : 1)
	19	#define ADDRCONF_TIMER_FUZZ (HZ / 4)
	20	#define ADDRCONF_TIMER_FUZZ_MAX (HZ)
	21
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);
e8e54d3c JP	90	int ipv6_rcv_saddr_equal(const struct sock sk, const struct sock sk2);
	91	void addrconf_join_solict(struct net_device dev, const struct in6_addr addr);
	92	void addrconf_leave_solict(struct inet6_dev idev, const struct in6_addr addr);
1da177e4	93
399e6f95 MB	94	static inline int addrconf_ifid_eui48(u8 eui, struct net_device dev)
	95	{
	96	if (dev->addr_len != ETH_ALEN)
	97	return -1;
	98	memcpy(eui, dev->dev_addr, 3);
	99	memcpy(eui + 5, dev->dev_addr + 3, 3);
	100
	101	/*
	102	* The zSeries OSA network cards can be shared among various
	103	* OS instances, but the OSA cards have only one MAC address.
	104	* This leads to duplicate address conflicts in conjunction
	105	* with IPv6 if more than one instance uses the same card.
	106	*
	107	* The driver for these cards can deliver a unique 16-bit
	108	* identifier for each instance sharing the same card. It is
	109	* placed instead of 0xFFFE in the interface identifier. The
	110	* "u" bit of the interface identifier is not inverted in this
	111	* case. Hence the resulting interface identifier has local
	112	* scope according to RFC2373.
	113	*/
	114	if (dev->dev_id) {
	115	eui[3] = (dev->dev_id >> 8) & 0xFF;
	116	eui[4] = dev->dev_id & 0xFF;
	117	} else {
	118	eui[3] = 0xFF;
	119	eui[4] = 0xFE;
	120	eui[0] ^= 2;
	121	}
	122	return 0;
	123	}
	124
4bed72e4	125	static inline unsigned long addrconf_timeout_fixup(u32 timeout,
95c96174	126	unsigned int unit)
4bed72e4 YH	127	{
	128	if (timeout == 0xffffffff)
	129	return ~0UL;
	130
	131	/*
	132	* Avoid arithmetic overflow.
	133	* Assuming unit is constant and non-zero, this "if" statement
	134	* will go away on 64bit archs.
	135	*/
	136	if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
	137	return LONG_MAX / unit;
	138
	139	return timeout;
	140	}
	141
	142	static inline int addrconf_finite_timeout(unsigned long timeout)
	143	{
	144	return ~timeout;
	145	}
	146
2a8cc6c8 YH	147	/*
	148	* IPv6 Address Label subsystem (addrlabel.c)
	149	*/
e8e54d3c JP	150	int ipv6_addr_label_init(void);
	151	void ipv6_addr_label_cleanup(void);
	152	void ipv6_addr_label_rtnl_register(void);
	153	u32 ipv6_addr_label(struct net net, const struct in6_addr addr,
	154	int type, int ifindex);
2a8cc6c8	155
1da177e4 LT	156	/*
	157	* multicast prototypes (mcast.c)
	158	*/
e8e54d3c JP	159	int ipv6_sock_mc_join(struct sock *sk, int ifindex,
	160	const struct in6_addr *addr);
	161	int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
	162	const struct in6_addr *addr);
	163	void ipv6_sock_mc_close(struct sock *sk);
	164	bool inet6_mc_check(struct sock sk, const struct in6_addr mc_addr,
	165	const struct in6_addr *src_addr);
	166
	167	int ipv6_dev_mc_inc(struct net_device dev, const struct in6_addr addr);
	168	int __ipv6_dev_mc_dec(struct inet6_dev idev, const struct in6_addr addr);
	169	int ipv6_dev_mc_dec(struct net_device dev, const struct in6_addr addr);
	170	void ipv6_mc_up(struct inet6_dev *idev);
	171	void ipv6_mc_down(struct inet6_dev *idev);
	172	void ipv6_mc_unmap(struct inet6_dev *idev);
	173	void ipv6_mc_remap(struct inet6_dev *idev);
	174	void ipv6_mc_init_dev(struct inet6_dev *idev);
	175	void ipv6_mc_destroy_dev(struct inet6_dev *idev);
9afd85c9	176	int ipv6_mc_check_mld(struct sk_buff skb, struct sk_buff *skb_trimmed);
e8e54d3c JP	177	void addrconf_dad_failure(struct inet6_ifaddr *ifp);
	178
	179	bool ipv6_chk_mcast_addr(struct net_device dev, const struct in6_addr group,
	180	const struct in6_addr *src_addr);
	181
	182	void ipv6_mc_dad_complete(struct inet6_dev *idev);
5f81bd2e CW	183
	184	/* A stub used by vxlan module. This is ugly, ideally these
	185	* symbols should be built into the core kernel.
	186	*/
	187	struct ipv6_stub {
	188	int (ipv6_sock_mc_join)(struct sock sk, int ifindex,
	189	const struct in6_addr *addr);
	190	int (ipv6_sock_mc_drop)(struct sock sk, int ifindex,
	191	const struct in6_addr *addr);
343d60aa RP	192	int (ipv6_dst_lookup)(struct net net, struct sock *sk,
343d60aa RP	193	struct dst_entry *dst, struct flowi6 fl6);
5f81bd2e	194	void (*udpv6_encap_enable)(void);
38cf595b	195	void (ndisc_send_na)(struct net_device dev, const struct in6_addr *daddr,
f564f45c CW	196	const struct in6_addr *solicited_addr,
f564f45c CW	197	bool router, bool solicited, bool override, bool inc_opt);
e15a00aa	198	struct neigh_table *nd_tbl;
5f81bd2e CW	199	};
	200	extern const struct ipv6_stub *ipv6_stub __read_mostly;
	201
daad1512 YH	202	/*
	203	* identify MLD packets for MLD filter exceptions
	204	*/
	205	static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
	206	{
	207	struct icmp6hdr *hdr;
	208
	209	if (nexthdr != IPPROTO_ICMPV6 \|\|
	210	!pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
	211	return false;
	212
	213	hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);
	214
	215	switch (hdr->icmp6_type) {
	216	case ICMPV6_MGM_QUERY:
	217	case ICMPV6_MGM_REPORT:
	218	case ICMPV6_MGM_REDUCTION:
	219	case ICMPV6_MLD2_REPORT:
	220	return true;
	221	default:
	222	break;
	223	}
	224	return false;
	225	}
1da177e4	226
e8e54d3c JP	227	void addrconf_prefix_rcv(struct net_device *dev,
e8e54d3c JP	228	u8 *opt, int len, bool sllao);
1da177e4	229
1da177e4 LT	230	/*
	231	* anycast prototypes (anycast.c)
	232	*/
e8e54d3c JP	233	int ipv6_sock_ac_join(struct sock *sk, int ifindex,
	234	const struct in6_addr *addr);
	235	int ipv6_sock_ac_drop(struct sock *sk, int ifindex,
	236	const struct in6_addr *addr);
	237	void ipv6_sock_ac_close(struct sock *sk);
	238
013b4d90	239	int __ipv6_dev_ac_inc(struct inet6_dev idev, const struct in6_addr addr);
e8e54d3c	240	int __ipv6_dev_ac_dec(struct inet6_dev idev, const struct in6_addr addr);
381f4dca	241	void ipv6_ac_destroy_dev(struct inet6_dev *idev);
e8e54d3c	242	bool ipv6_chk_acast_addr(struct net net, struct net_device dev,
7c90cc2d FLB	243	const struct in6_addr *addr);
	244	bool ipv6_chk_acast_addr_src(struct net net, struct net_device dev,
	245	const struct in6_addr *addr);
1da177e4 LT	246
1da177e4 LT	247	/* Device notifier */
e8e54d3c JP	248	int register_inet6addr_notifier(struct notifier_block *nb);
	249	int unregister_inet6addr_notifier(struct notifier_block *nb);
	250	int inet6addr_notifier_call_chain(unsigned long val, void *v);
1da177e4	251
e8e54d3c JP	252	void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
e8e54d3c JP	253	struct ipv6_devconf *devconf);
d67b8c61	254
48daa3bb ED	255	/**
	256	* __in6_dev_get - get inet6_dev pointer from netdevice
	257	* @dev: network device
	258	*
	259	* Caller must hold rcu_read_lock or RTNL, because this function
	260	* does not take a reference on the inet6_dev.
	261	*/
	262	static inline struct inet6_dev __in6_dev_get(const struct net_device dev)
1da177e4	263	{
48daa3bb	264	return rcu_dereference_rtnl(dev->ip6_ptr);
1da177e4 LT	265	}
1da177e4 LT	266
48daa3bb ED	267	/**
	268	* in6_dev_get - get inet6_dev pointer from netdevice
	269	* @dev: network device
	270	*
	271	* This version can be used in any context, and takes a reference
	272	* on the inet6_dev. Callers must use in6_dev_put() later to
	273	* release this reference.
	274	*/
	275	static inline struct inet6_dev in6_dev_get(const struct net_device dev)
1da177e4	276	{
48daa3bb ED	277	struct inet6_dev *idev;
48daa3bb ED	278
8814c4b5	279	rcu_read_lock();
48daa3bb	280	idev = rcu_dereference(dev->ip6_ptr);
1da177e4 LT	281	if (idev)
1da177e4 LT	282	atomic_inc(&idev->refcnt);
8814c4b5	283	rcu_read_unlock();
1da177e4 LT	284	return idev;
	285	}
	286
bba24896 JP	287	static inline struct neigh_parms __in6_dev_nd_parms_get_rcu(const struct net_device dev)
	288	{
	289	struct inet6_dev *idev = __in6_dev_get(dev);
	290
	291	return idev ? idev->nd_parms : NULL;
	292	}
	293
e8e54d3c	294	void in6_dev_finish_destroy(struct inet6_dev *idev);
1da177e4	295
48daa3bb	296	static inline void in6_dev_put(struct inet6_dev *idev)
1da177e4 LT	297	{
	298	if (atomic_dec_and_test(&idev->refcnt))
	299	in6_dev_finish_destroy(idev);
	300	}
	301
48daa3bb ED	302	static inline void __in6_dev_put(struct inet6_dev *idev)
	303	{
	304	atomic_dec(&idev->refcnt);
	305	}
1da177e4	306
48daa3bb ED	307	static inline void in6_dev_hold(struct inet6_dev *idev)
	308	{
	309	atomic_inc(&idev->refcnt);
	310	}
1da177e4	311
e8e54d3c	312	void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
1da177e4 LT	313
	314	static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
	315	{
	316	if (atomic_dec_and_test(&ifp->refcnt))
	317	inet6_ifa_finish_destroy(ifp);
	318	}
	319
48daa3bb ED	320	static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
	321	{
	322	atomic_dec(&ifp->refcnt);
	323	}
1da177e4	324
48daa3bb ED	325	static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
	326	{
	327	atomic_inc(&ifp->refcnt);
	328	}
1da177e4	329
1da177e4 LT	330
	331	/*
	332	* compute link-local solicited-node multicast address
	333	*/
	334
	335	static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
	336	struct in6_addr *solicited)
	337	{
	338	ipv6_addr_set(solicited,
0e7b8dcd YH	339	htonl(0xFF020000), 0,
	340	htonl(0x1),
	341	htonl(0xFF000000) \| addr->s6_addr32[3]);
1da177e4 LT	342	}
1da177e4 LT	343
b27b28cb	344	static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
1da177e4	345	{
d1641565	346	#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
bc861959	347	__be64 p = (__be64 )addr;
d1641565 YH	348	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) \| (p[1] ^ cpu_to_be64(1))) == 0UL;
d1641565 YH	349	#else
48daa3bb	350	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
fed85383	351	addr->s6_addr32[1] \| addr->s6_addr32[2] \|
48daa3bb	352	(addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
d1641565	353	#endif
1da177e4 LT	354	}
1da177e4 LT	355
b27b28cb	356	static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
1da177e4	357	{
d1641565	358	#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
bc861959	359	__be64 p = (__be64 )addr;
d1641565 YH	360	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) \| (p[1] ^ cpu_to_be64(2))) == 0UL;
d1641565 YH	361	#else
48daa3bb	362	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
fed85383	363	addr->s6_addr32[1] \| addr->s6_addr32[2] \|
48daa3bb	364	(addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
d1641565	365	#endif
1da177e4 LT	366	}
1da177e4 LT	367
b27b28cb	368	static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
c7dc89c0	369	{
48daa3bb	370	return (addr->s6_addr32[2] \| htonl(0x02000000)) == htonl(0x02005EFE);
c7dc89c0 FT	371	}
c7dc89c0 FT	372
ca97a644 YH	373	static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
ca97a644 YH	374	{
9d100774	375	#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
bc861959	376	__be64 p = (__be64 )addr;
9d100774 YH	377	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) \|
	378	((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) &
	379	cpu_to_be64(0xffffffffff000000UL))) == 0UL;
	380	#else
	381	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
	382	addr->s6_addr32[1] \|
	383	(addr->s6_addr32[2] ^ htonl(0x00000001)) \|
	384	(addr->s6_addr[12] ^ 0xff)) == 0;
	385	#endif
ca97a644 YH	386	}
ca97a644 YH	387
20380731	388	#ifdef CONFIG_PROC_FS
e8e54d3c JP	389	int if6_proc_init(void);
e8e54d3c JP	390	void if6_proc_exit(void);
20380731 ACM	391	#endif
20380731 ACM	392
1da177e4	393	#endif