[net-next-2.6.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 struct inet6_ifaddr      *ipv6_get_ifaddr(struct net *net,
						 struct in6_addr *addr,
						 struct net_device *dev,
						 int strict);

extern int			ipv6_dev_get_saddr(struct net_device *dev, 
					       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);

/*
 *	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(const struct in6_addr *addr,
						int type, int ifindex);

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

extern int ipv6_dev_mc_inc(struct net_device *dev, struct in6_addr *addr);
extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, struct in6_addr *addr);
extern int ipv6_dev_mc_dec(struct net_device *dev, 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, struct in6_addr *group,
		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_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)


extern void			addrconf_forwarding_on(void);
/*
 *	Hash function taken from net_alias.c
 */

static __inline__ u8 ipv6_addr_hash(const struct in6_addr *addr)
{	
	__u32 word;

	/* 
	 * We perform the hash function over the last 64 bits of the address
	 * This will include the IEEE address token on links that support it.
	 */

	word = (__force u32)(addr->s6_addr32[2] ^ addr->s6_addr32[3]);
	word ^= (word >> 16);
	word ^= (word >> 8);

	return ((word ^ (word >> 4)) & 0x0f);
}

/*
 *	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 void ipv6_addr_all_nodes(struct in6_addr *addr)
{
	ipv6_addr_set(addr, htonl(0xFF020000), 0, 0, htonl(0x1));
}

static inline void ipv6_addr_all_routers(struct in6_addr *addr)
{
	ipv6_addr_set(addr, htonl(0xFF020000), 0, 0, htonl(0x2));
}

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] == 0 &&
		addr->s6_addr32[2] == 0 &&
		addr->s6_addr32[3] == htonl(0x00000001));
}

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] == 0 &&
		addr->s6_addr32[2] == 0 &&
		addr->s6_addr32[3] == htonl(0x00000002));
}

static inline int ipv6_isatap_eui64(u8 *eui, __be32 addr)
{
	eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) ||
		  ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) ||
		  ipv4_is_private_172(addr) || ipv4_is_test_192(addr) ||
		  ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) ||
		  ipv4_is_test_198(addr) || ipv4_is_multicast(addr) ||
		  ipv4_is_lbcast(addr)) ? 0x00 : 0x02;
	eui[1] = 0;
	eui[2] = 0x5E;
	eui[3] = 0xFE;
	memcpy (eui+4, &addr, 4);
	return 0;
}

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
1cab3da6 DL	74	extern struct inet6_ifaddr ipv6_get_ifaddr(struct net net,
	75	struct in6_addr *addr,
	76	struct net_device *dev,
	77	int strict);
	78
1da177e4 LT	79	extern int ipv6_dev_get_saddr(struct net_device *dev,
1da177e4 LT	80	struct in6_addr *daddr,
7cbca67c	81	unsigned int srcprefs,
1da177e4	82	struct in6_addr *saddr);
95c385b4 NH	83	extern int ipv6_get_lladdr(struct net_device *dev,
	84	struct in6_addr *addr,
	85	unsigned char banned_flags);
1da177e4 LT	86	extern int ipv6_rcv_saddr_equal(const struct sock *sk,
	87	const struct sock *sk2);
	88	extern void addrconf_join_solict(struct net_device *dev,
	89	struct in6_addr *addr);
	90	extern void addrconf_leave_solict(struct inet6_dev *idev,
	91	struct in6_addr *addr);
	92
2a8cc6c8 YH	93	/*
	94	* IPv6 Address Label subsystem (addrlabel.c)
	95	*/
	96	extern int ipv6_addr_label_init(void);
	97	extern void ipv6_addr_label_rtnl_register(void);
	98	extern u32 ipv6_addr_label(const struct in6_addr *addr,
	99	int type, int ifindex);
	100
1da177e4 LT	101	/*
	102	* multicast prototypes (mcast.c)
	103	*/
	104	extern int ipv6_sock_mc_join(struct sock *sk, int ifindex,
	105	struct in6_addr *addr);
	106	extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
	107	struct in6_addr *addr);
	108	extern void ipv6_sock_mc_close(struct sock *sk);
	109	extern int inet6_mc_check(struct sock sk, struct in6_addr mc_addr,
	110	struct in6_addr *src_addr);
	111
	112	extern int ipv6_dev_mc_inc(struct net_device dev, struct in6_addr addr);
	113	extern int __ipv6_dev_mc_dec(struct inet6_dev idev, struct in6_addr addr);
	114	extern int ipv6_dev_mc_dec(struct net_device dev, struct in6_addr addr);
	115	extern void ipv6_mc_up(struct inet6_dev *idev);
	116	extern void ipv6_mc_down(struct inet6_dev *idev);
	117	extern void ipv6_mc_init_dev(struct inet6_dev *idev);
	118	extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
	119	extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
	120
	121	extern int ipv6_chk_mcast_addr(struct net_device dev, struct in6_addr group,
	122	struct in6_addr *src_addr);
	123	extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr);
	124
	125	extern void addrconf_prefix_rcv(struct net_device dev, u8 opt, int len);
	126
1da177e4 LT	127	/*
	128	* anycast prototypes (anycast.c)
	129	*/
	130	extern int ipv6_sock_ac_join(struct sock sk,int ifindex,struct in6_addr addr);
	131	extern int ipv6_sock_ac_drop(struct sock sk,int ifindex,struct in6_addr addr);
	132	extern void ipv6_sock_ac_close(struct sock *sk);
	133	extern int inet6_ac_check(struct sock sk, struct in6_addr addr, int ifindex);
	134
	135	extern int ipv6_dev_ac_inc(struct net_device dev, struct in6_addr addr);
	136	extern int __ipv6_dev_ac_dec(struct inet6_dev idev, struct in6_addr addr);
	137	extern int ipv6_chk_acast_addr(struct net_device dev, struct in6_addr addr);
	138
	139
	140	/* Device notifier */
	141	extern int register_inet6addr_notifier(struct notifier_block *nb);
	142	extern int unregister_inet6addr_notifier(struct notifier_block *nb);
	143
	144	static inline struct inet6_dev *
	145	__in6_dev_get(struct net_device *dev)
	146	{
8814c4b5	147	return rcu_dereference(dev->ip6_ptr);
1da177e4 LT	148	}
1da177e4 LT	149
1da177e4 LT	150	static inline struct inet6_dev *
	151	in6_dev_get(struct net_device *dev)
	152	{
	153	struct inet6_dev *idev = NULL;
8814c4b5 YH	154	rcu_read_lock();
8814c4b5 YH	155	idev = __in6_dev_get(dev);
1da177e4 LT	156	if (idev)
1da177e4 LT	157	atomic_inc(&idev->refcnt);
8814c4b5	158	rcu_read_unlock();
1da177e4 LT	159	return idev;
	160	}
	161
	162	extern void in6_dev_finish_destroy(struct inet6_dev *idev);
	163
	164	static inline void
	165	in6_dev_put(struct inet6_dev *idev)
	166	{
	167	if (atomic_dec_and_test(&idev->refcnt))
	168	in6_dev_finish_destroy(idev);
	169	}
	170
	171	#define __in6_dev_put(idev) atomic_dec(&(idev)->refcnt)
	172	#define in6_dev_hold(idev) atomic_inc(&(idev)->refcnt)
	173
	174
	175	extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
	176
	177	static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
	178	{
	179	if (atomic_dec_and_test(&ifp->refcnt))
	180	inet6_ifa_finish_destroy(ifp);
	181	}
	182
	183	#define __in6_ifa_put(ifp) atomic_dec(&(ifp)->refcnt)
	184	#define in6_ifa_hold(ifp) atomic_inc(&(ifp)->refcnt)
	185
	186
	187	extern void addrconf_forwarding_on(void);
	188	/*
	189	* Hash function taken from net_alias.c
	190	*/
	191
	192	static __inline__ u8 ipv6_addr_hash(const struct in6_addr *addr)
	193	{
	194	__u32 word;
	195
	196	/*
	197	* We perform the hash function over the last 64 bits of the address
	198	* This will include the IEEE address token on links that support it.
	199	*/
	200
e69a4adc	201	word = (__force u32)(addr->s6_addr32[2] ^ addr->s6_addr32[3]);
1da177e4 LT	202	word ^= (word >> 16);
	203	word ^= (word >> 8);
	204
	205	return ((word ^ (word >> 4)) & 0x0f);
	206	}
	207
	208	/*
	209	* compute link-local solicited-node multicast address
	210	*/
	211
	212	static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
	213	struct in6_addr *solicited)
	214	{
	215	ipv6_addr_set(solicited,
0e7b8dcd YH	216	htonl(0xFF020000), 0,
	217	htonl(0x1),
	218	htonl(0xFF000000) \| addr->s6_addr32[3]);
1da177e4 LT	219	}
	220
	221
	222	static inline void ipv6_addr_all_nodes(struct in6_addr *addr)
	223	{
0e7b8dcd	224	ipv6_addr_set(addr, htonl(0xFF020000), 0, 0, htonl(0x1));
1da177e4 LT	225	}
	226
	227	static inline void ipv6_addr_all_routers(struct in6_addr *addr)
	228	{
0e7b8dcd	229	ipv6_addr_set(addr, htonl(0xFF020000), 0, 0, htonl(0x2));
1da177e4 LT	230	}
	231
	232	static inline int ipv6_addr_is_multicast(const struct in6_addr *addr)
	233	{
0e7b8dcd	234	return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000);
1da177e4 LT	235	}
	236
	237	static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
	238	{
	239	return (addr->s6_addr32[0] == htonl(0xff020000) &&
	240	addr->s6_addr32[1] == 0 &&
	241	addr->s6_addr32[2] == 0 &&
	242	addr->s6_addr32[3] == htonl(0x00000001));
	243	}
	244
	245	static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
	246	{
	247	return (addr->s6_addr32[0] == htonl(0xff020000) &&
	248	addr->s6_addr32[1] == 0 &&
	249	addr->s6_addr32[2] == 0 &&
	250	addr->s6_addr32[3] == htonl(0x00000002));
	251	}
	252
c7dc89c0 FT	253	static inline int ipv6_isatap_eui64(u8 *eui, __be32 addr)
c7dc89c0 FT	254	{
3db8cda3 JP	255	eui[0] = (ipv4_is_zeronet(addr) \|\| ipv4_is_private_10(addr) \|\|
	256	ipv4_is_loopback(addr) \|\| ipv4_is_linklocal_169(addr) \|\|
	257	ipv4_is_private_172(addr) \|\| ipv4_is_test_192(addr) \|\|
	258	ipv4_is_anycast_6to4(addr) \|\| ipv4_is_private_192(addr) \|\|
	259	ipv4_is_test_198(addr) \|\| ipv4_is_multicast(addr) \|\|
1e637c74	260	ipv4_is_lbcast(addr)) ? 0x00 : 0x02;
c7dc89c0 FT	261	eui[1] = 0;
	262	eui[2] = 0x5E;
	263	eui[3] = 0xFE;
	264	memcpy (eui+4, &addr, 4);
	265	return 0;
	266	}
	267
	268	static inline int ipv6_addr_is_isatap(const struct in6_addr *addr)
	269	{
	270	return ((addr->s6_addr32[2] \| htonl(0x02000000)) == htonl(0x02005EFE));
	271	}
	272
20380731 ACM	273	#ifdef CONFIG_PROC_FS
	274	extern int if6_proc_init(void);
	275	extern void if6_proc_exit(void);
	276	#endif
	277
1da177e4 LT	278	#endif
1da177e4 LT	279	#endif