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

#ifndef _ADDRCONF_H
#define _ADDRCONF_H

#define RETRANS_TIMER	HZ

#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			(5)
#define MAX_DESYNC_FACTOR		(600)

#define ADDR_CHECK_FREQUENCY		(120*HZ)

#define IPV6_MAX_ADDRESSES		16

#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;
};


#ifdef __KERNEL__

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

#define IN6_ADDR_HSIZE		16

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

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

extern int			ipv6_chk_addr(struct net *net,
					      struct in6_addr *addr,
					      struct net_device *dev,
					      int strict);

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

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

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

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

static inline unsigned long addrconf_timeout_fixup(u32 timeout,
						    unsigned 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)
 */
extern int			ipv6_addr_label_init(void);
extern void			ipv6_addr_label_rtnl_register(void);
extern u32			ipv6_addr_label(struct net *net,
						const struct in6_addr *addr,
						int type, int ifindex);

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

extern int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
extern int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
extern void ipv6_mc_up(struct inet6_dev *idev);
extern void ipv6_mc_down(struct inet6_dev *idev);
extern void ipv6_mc_init_dev(struct inet6_dev *idev);
extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);

extern int ipv6_chk_mcast_addr(struct net_device *dev,
			       const struct in6_addr *group,
			       const struct in6_addr *src_addr);
extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr);

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

/*
 *	anycast prototypes (anycast.c)
 */
extern int ipv6_sock_ac_join(struct sock *sk,int ifindex,struct in6_addr *addr);
extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex,struct in6_addr *addr);
extern void ipv6_sock_ac_close(struct sock *sk);
extern int inet6_ac_check(struct sock *sk, struct in6_addr *addr, int ifindex);

extern int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr);
extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr);
extern int ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
			       struct in6_addr *addr);


/* Device notifier */
extern int register_inet6addr_notifier(struct notifier_block *nb);
extern int unregister_inet6addr_notifier(struct notifier_block *nb);

static inline struct inet6_dev *
__in6_dev_get(struct net_device *dev)
{
	return rcu_dereference(dev->ip6_ptr);
}

static inline struct inet6_dev *
in6_dev_get(struct net_device *dev)
{
	struct inet6_dev *idev = NULL;
	rcu_read_lock();
	idev = __in6_dev_get(dev);
	if (idev)
		atomic_inc(&idev->refcnt);
	rcu_read_unlock();
	return idev;
}

extern 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);
}

#define __in6_dev_put(idev)  atomic_dec(&(idev)->refcnt)
#define in6_dev_hold(idev)   atomic_inc(&(idev)->refcnt)


extern 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);
}

#define __in6_ifa_put(ifp)	atomic_dec(&(ifp)->refcnt)
#define in6_ifa_hold(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 int ipv6_addr_is_multicast(const struct in6_addr *addr)
{
	return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000);
}

static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
{
	return (((addr->s6_addr32[0] ^ htonl(0xff020000)) |
		addr->s6_addr32[1] | addr->s6_addr32[2] |
		(addr->s6_addr32[3] ^ htonl(0x00000001))) == 0);
}

static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
{
	return (((addr->s6_addr32[0] ^ htonl(0xff020000)) |
		addr->s6_addr32[1] | addr->s6_addr32[2] |
		(addr->s6_addr32[3] ^ htonl(0x00000002))) == 0);
}

extern int __ipv6_isatap_ifid(u8 *eui, __be32 addr);

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

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

#endif
#endif
Commit	Line	Data
1da177e4 LT	1	#ifndef _ADDRCONF_H
	2	#define _ADDRCONF_H
	3
	4	#define RETRANS_TIMER HZ
	5
	6	#define MAX_RTR_SOLICITATIONS 3
	7	#define RTR_SOLICITATION_INTERVAL (4*HZ)
	8
	9	#define MIN_VALID_LIFETIME (23600) / 2 hours */
	10
	11	#define TEMP_VALID_LIFETIME (7*86400)
	12	#define TEMP_PREFERRED_LIFETIME (86400)
	13	#define REGEN_MAX_RETRY (5)
	14	#define MAX_DESYNC_FACTOR (600)
	15
	16	#define ADDR_CHECK_FREQUENCY (120*HZ)
	17
	18	#define IPV6_MAX_ADDRESSES 16
	19
c7dc89c0	20	#include <linux/in.h>
6a800d45 PM	21	#include <linux/in6.h>
6a800d45 PM	22
1da177e4 LT	23	struct prefix_info {
	24	__u8 type;
	25	__u8 length;
	26	__u8 prefix_len;
	27
	28	#if defined(__BIG_ENDIAN_BITFIELD)
	29	__u8 onlink : 1,
	30	autoconf : 1,
	31	reserved : 6;
	32	#elif defined(__LITTLE_ENDIAN_BITFIELD)
	33	__u8 reserved : 6,
	34	autoconf : 1,
	35	onlink : 1;
	36	#else
	37	#error "Please fix <asm/byteorder.h>"
	38	#endif
e69a4adc AV	39	__be32 valid;
	40	__be32 prefered;
	41	__be32 reserved2;
1da177e4 LT	42
	43	struct in6_addr prefix;
	44	};
	45
	46
	47	#ifdef __KERNEL__
	48
1da177e4 LT	49	#include <linux/netdevice.h>
1da177e4 LT	50	#include <net/if_inet6.h>
e4553edd	51	#include <net/ipv6.h>
1da177e4 LT	52
	53	#define IN6_ADDR_HSIZE 16
	54
	55	extern int addrconf_init(void);
	56	extern void addrconf_cleanup(void);
	57
af284937 DL	58	extern int addrconf_add_ifaddr(struct net *net,
	59	void __user *arg);
	60	extern int addrconf_del_ifaddr(struct net *net,
	61	void __user *arg);
	62	extern int addrconf_set_dstaddr(struct net *net,
	63	void __user *arg);
1da177e4	64
bfeade08 DL	65	extern int ipv6_chk_addr(struct net *net,
bfeade08 DL	66	struct in6_addr *addr,
1da177e4 LT	67	struct net_device *dev,
1da177e4 LT	68	int strict);
bfeade08	69
59fbb3a6	70	#if defined(CONFIG_IPV6_MIP6) \|\| defined(CONFIG_IPV6_MIP6_MODULE)
389f6612 DL	71	extern int ipv6_chk_home_addr(struct net *net,
389f6612 DL	72	struct in6_addr *addr);
65d4ed92	73	#endif
52eeeb84 YH	74
	75	extern int ipv6_chk_prefix(struct in6_addr *addr,
	76	struct net_device *dev);
	77
1cab3da6	78	extern struct inet6_ifaddr ipv6_get_ifaddr(struct net net,
9acd9f3a	79	const struct in6_addr *addr,
1cab3da6 DL	80	struct net_device *dev,
	81	int strict);
	82
1da177e4	83	extern int ipv6_dev_get_saddr(struct net_device *dev,
9acd9f3a	84	const struct in6_addr *daddr,
7cbca67c	85	unsigned int srcprefs,
1da177e4	86	struct in6_addr *saddr);
95c385b4 NH	87	extern int ipv6_get_lladdr(struct net_device *dev,
	88	struct in6_addr *addr,
	89	unsigned char banned_flags);
1da177e4 LT	90	extern int ipv6_rcv_saddr_equal(const struct sock *sk,
	91	const struct sock *sk2);
	92	extern void addrconf_join_solict(struct net_device *dev,
	93	struct in6_addr *addr);
	94	extern void addrconf_leave_solict(struct inet6_dev *idev,
	95	struct in6_addr *addr);
	96
4bed72e4 YH	97	static inline unsigned long addrconf_timeout_fixup(u32 timeout,
	98	unsigned unit)
	99	{
	100	if (timeout == 0xffffffff)
	101	return ~0UL;
	102
	103	/*
	104	* Avoid arithmetic overflow.
	105	* Assuming unit is constant and non-zero, this "if" statement
	106	* will go away on 64bit archs.
	107	*/
	108	if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
	109	return LONG_MAX / unit;
	110
	111	return timeout;
	112	}
	113
	114	static inline int addrconf_finite_timeout(unsigned long timeout)
	115	{
	116	return ~timeout;
	117	}
	118
2a8cc6c8 YH	119	/*
	120	* IPv6 Address Label subsystem (addrlabel.c)
	121	*/
	122	extern int ipv6_addr_label_init(void);
	123	extern void ipv6_addr_label_rtnl_register(void);
3de23255 BT	124	extern u32 ipv6_addr_label(struct net *net,
3de23255 BT	125	const struct in6_addr *addr,
2a8cc6c8 YH	126	int type, int ifindex);
2a8cc6c8 YH	127
1da177e4 LT	128	/*
	129	* multicast prototypes (mcast.c)
	130	*/
9acd9f3a YH	131	extern int ipv6_sock_mc_join(struct sock *sk, int ifindex,
	132	const struct in6_addr *addr);
	133	extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
	134	const struct in6_addr *addr);
1da177e4	135	extern void ipv6_sock_mc_close(struct sock *sk);
9acd9f3a YH	136	extern int inet6_mc_check(struct sock *sk,
	137	const struct in6_addr *mc_addr,
	138	const struct in6_addr *src_addr);
1da177e4	139
9acd9f3a YH	140	extern int ipv6_dev_mc_inc(struct net_device dev, const struct in6_addr addr);
	141	extern int __ipv6_dev_mc_dec(struct inet6_dev idev, const struct in6_addr addr);
	142	extern int ipv6_dev_mc_dec(struct net_device dev, const struct in6_addr addr);
1da177e4 LT	143	extern void ipv6_mc_up(struct inet6_dev *idev);
	144	extern void ipv6_mc_down(struct inet6_dev *idev);
	145	extern void ipv6_mc_init_dev(struct inet6_dev *idev);
	146	extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
	147	extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
	148
9acd9f3a YH	149	extern int ipv6_chk_mcast_addr(struct net_device *dev,
	150	const struct in6_addr *group,
	151	const struct in6_addr *src_addr);
1da177e4 LT	152	extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr);
	153
	154	extern void addrconf_prefix_rcv(struct net_device dev, u8 opt, int len);
	155
1da177e4 LT	156	/*
	157	* anycast prototypes (anycast.c)
	158	*/
	159	extern int ipv6_sock_ac_join(struct sock sk,int ifindex,struct in6_addr addr);
	160	extern int ipv6_sock_ac_drop(struct sock sk,int ifindex,struct in6_addr addr);
	161	extern void ipv6_sock_ac_close(struct sock *sk);
	162	extern int inet6_ac_check(struct sock sk, struct in6_addr addr, int ifindex);
	163
	164	extern int ipv6_dev_ac_inc(struct net_device dev, struct in6_addr addr);
	165	extern int __ipv6_dev_ac_dec(struct inet6_dev idev, struct in6_addr addr);
6ab57e7e DL	166	extern int ipv6_chk_acast_addr(struct net net, struct net_device dev,
6ab57e7e DL	167	struct in6_addr *addr);
1da177e4 LT	168
	169
	170	/* Device notifier */
	171	extern int register_inet6addr_notifier(struct notifier_block *nb);
	172	extern int unregister_inet6addr_notifier(struct notifier_block *nb);
	173
	174	static inline struct inet6_dev *
	175	__in6_dev_get(struct net_device *dev)
	176	{
8814c4b5	177	return rcu_dereference(dev->ip6_ptr);
1da177e4 LT	178	}
1da177e4 LT	179
1da177e4 LT	180	static inline struct inet6_dev *
	181	in6_dev_get(struct net_device *dev)
	182	{
	183	struct inet6_dev *idev = NULL;
8814c4b5 YH	184	rcu_read_lock();
8814c4b5 YH	185	idev = __in6_dev_get(dev);
1da177e4 LT	186	if (idev)
1da177e4 LT	187	atomic_inc(&idev->refcnt);
8814c4b5	188	rcu_read_unlock();
1da177e4 LT	189	return idev;
	190	}
	191
	192	extern void in6_dev_finish_destroy(struct inet6_dev *idev);
	193
	194	static inline void
	195	in6_dev_put(struct inet6_dev *idev)
	196	{
	197	if (atomic_dec_and_test(&idev->refcnt))
	198	in6_dev_finish_destroy(idev);
	199	}
	200
	201	#define __in6_dev_put(idev) atomic_dec(&(idev)->refcnt)
	202	#define in6_dev_hold(idev) atomic_inc(&(idev)->refcnt)
	203
	204
	205	extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
	206
	207	static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
	208	{
	209	if (atomic_dec_and_test(&ifp->refcnt))
	210	inet6_ifa_finish_destroy(ifp);
	211	}
	212
	213	#define __in6_ifa_put(ifp) atomic_dec(&(ifp)->refcnt)
	214	#define in6_ifa_hold(ifp) atomic_inc(&(ifp)->refcnt)
	215
	216
1da177e4 LT	217
	218	/*
	219	* compute link-local solicited-node multicast address
	220	*/
	221
	222	static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
	223	struct in6_addr *solicited)
	224	{
	225	ipv6_addr_set(solicited,
0e7b8dcd YH	226	htonl(0xFF020000), 0,
	227	htonl(0x1),
	228	htonl(0xFF000000) \| addr->s6_addr32[3]);
1da177e4 LT	229	}
1da177e4 LT	230
1da177e4 LT	231	static inline int ipv6_addr_is_multicast(const struct in6_addr *addr)
1da177e4 LT	232	{
0e7b8dcd	233	return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000);
1da177e4 LT	234	}
	235
	236	static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
	237	{
fed85383 YH	238	return (((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
	239	addr->s6_addr32[1] \| addr->s6_addr32[2] \|
	240	(addr->s6_addr32[3] ^ htonl(0x00000001))) == 0);
1da177e4 LT	241	}
	242
	243	static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
	244	{
fed85383 YH	245	return (((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
	246	addr->s6_addr32[1] \| addr->s6_addr32[2] \|
	247	(addr->s6_addr32[3] ^ htonl(0x00000002))) == 0);
1da177e4 LT	248	}
1da177e4 LT	249
dfd982ba	250	extern int __ipv6_isatap_ifid(u8 *eui, __be32 addr);
c7dc89c0 FT	251
	252	static inline int ipv6_addr_is_isatap(const struct in6_addr *addr)
	253	{
	254	return ((addr->s6_addr32[2] \| htonl(0x02000000)) == htonl(0x02005EFE));
	255	}
	256
20380731 ACM	257	#ifdef CONFIG_PROC_FS
	258	extern int if6_proc_init(void);
	259	extern void if6_proc_exit(void);
	260	#endif
	261
1da177e4 LT	262	#endif
1da177e4 LT	263	#endif