[mirror_ubuntu-bionic-kernel.git] / include / net / if_inet6.h

/*
 *	inet6 interface/address list definitions
 *	Linux INET6 implementation 
 *
 *	Authors:
 *	Pedro Roque		<roque@di.fc.ul.pt>	
 *
 *
 *	This program is free software; you can redistribute it and/or
 *      modify it under the terms of the GNU General Public License
 *      as published by the Free Software Foundation; either version
 *      2 of the License, or (at your option) any later version.
 */

#ifndef _NET_IF_INET6_H
#define _NET_IF_INET6_H

#include <net/snmp.h>
#include <linux/ipv6.h>
#include <linux/refcount.h>

/* inet6_dev.if_flags */

#define IF_RA_OTHERCONF	0x80
#define IF_RA_MANAGED	0x40
#define IF_RA_RCVD	0x20
#define IF_RS_SENT	0x10
#define IF_READY	0x80000000

/* prefix flags */
#define IF_PREFIX_ONLINK	0x01
#define IF_PREFIX_AUTOCONF	0x02

enum {
	INET6_IFADDR_STATE_PREDAD,
	INET6_IFADDR_STATE_DAD,
	INET6_IFADDR_STATE_POSTDAD,
	INET6_IFADDR_STATE_ERRDAD,
	INET6_IFADDR_STATE_DEAD,
};

struct inet6_ifaddr {
	struct in6_addr		addr;
	__u32			prefix_len;

	/* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */
	__u32			valid_lft;
	__u32			prefered_lft;
	refcount_t		refcnt;
	spinlock_t		lock;

	int			state;

	__u32			flags;
	__u8			dad_probes;
	__u8			stable_privacy_retry;

	__u16			scope;
	__u64			dad_nonce;

	unsigned long		cstamp;	/* created timestamp */
	unsigned long		tstamp; /* updated timestamp */

	struct delayed_work	dad_work;

	struct inet6_dev	*idev;
	struct rt6_info		*rt;

	struct hlist_node	addr_lst;
	struct list_head	if_list;

	struct list_head	tmp_list;
	struct inet6_ifaddr	*ifpub;
	int			regen_count;

	bool			tokenized;

	struct rcu_head		rcu;
	struct in6_addr		peer_addr;
};

struct ip6_sf_socklist {
	unsigned int		sl_max;
	unsigned int		sl_count;
	struct in6_addr		sl_addr[0];
};

#define IP6_SFLSIZE(count)	(sizeof(struct ip6_sf_socklist) + \
	(count) * sizeof(struct in6_addr))

#define IP6_SFBLOCK	10	/* allocate this many at once */

struct ipv6_mc_socklist {
	struct in6_addr		addr;
	int			ifindex;
	struct ipv6_mc_socklist __rcu *next;
	rwlock_t		sflock;
	unsigned int		sfmode;		/* MCAST_{INCLUDE,EXCLUDE} */
	struct ip6_sf_socklist	*sflist;
	struct rcu_head		rcu;
};

struct ip6_sf_list {
	struct ip6_sf_list	*sf_next;
	struct in6_addr		sf_addr;
	unsigned long		sf_count[2];	/* include/exclude counts */
	unsigned char		sf_gsresp;	/* include in g & s response? */
	unsigned char		sf_oldin;	/* change state */
	unsigned char		sf_crcount;	/* retrans. left to send */
};

#define MAF_TIMER_RUNNING	0x01
#define MAF_LAST_REPORTER	0x02
#define MAF_LOADED		0x04
#define MAF_NOREPORT		0x08
#define MAF_GSQUERY		0x10

struct ifmcaddr6 {
	struct in6_addr		mca_addr;
	struct inet6_dev	*idev;
	struct ifmcaddr6	*next;
	struct ip6_sf_list	*mca_sources;
	struct ip6_sf_list	*mca_tomb;
	unsigned int		mca_sfmode;
	unsigned char		mca_crcount;
	unsigned long		mca_sfcount[2];
	struct timer_list	mca_timer;
	unsigned int		mca_flags;
	int			mca_users;
	refcount_t		mca_refcnt;
	spinlock_t		mca_lock;
	unsigned long		mca_cstamp;
	unsigned long		mca_tstamp;
};

/* Anycast stuff */

struct ipv6_ac_socklist {
	struct in6_addr		acl_addr;
	int			acl_ifindex;
	struct ipv6_ac_socklist *acl_next;
};

struct ifacaddr6 {
	struct in6_addr		aca_addr;
	struct inet6_dev	*aca_idev;
	struct rt6_info		*aca_rt;
	struct ifacaddr6	*aca_next;
	int			aca_users;
	refcount_t		aca_refcnt;
	unsigned long		aca_cstamp;
	unsigned long		aca_tstamp;
};

#define	IFA_HOST	IPV6_ADDR_LOOPBACK
#define	IFA_LINK	IPV6_ADDR_LINKLOCAL
#define	IFA_SITE	IPV6_ADDR_SITELOCAL

struct ipv6_devstat {
	struct proc_dir_entry	*proc_dir_entry;
	DEFINE_SNMP_STAT(struct ipstats_mib, ipv6);
	DEFINE_SNMP_STAT_ATOMIC(struct icmpv6_mib_device, icmpv6dev);
	DEFINE_SNMP_STAT_ATOMIC(struct icmpv6msg_mib_device, icmpv6msgdev);
};

struct inet6_dev {
	struct net_device	*dev;

	struct list_head	addr_list;

	struct ifmcaddr6	*mc_list;
	struct ifmcaddr6	*mc_tomb;
	spinlock_t		mc_lock;

	unsigned char		mc_qrv;		/* Query Robustness Variable */
	unsigned char		mc_gq_running;
	unsigned char		mc_ifc_count;
	unsigned char		mc_dad_count;

	unsigned long		mc_v1_seen;	/* Max time we stay in MLDv1 mode */
	unsigned long		mc_qi;		/* Query Interval */
	unsigned long		mc_qri;		/* Query Response Interval */
	unsigned long		mc_maxdelay;

	struct timer_list	mc_gq_timer;	/* general query timer */
	struct timer_list	mc_ifc_timer;	/* interface change timer */
	struct timer_list	mc_dad_timer;	/* dad complete mc timer */

	struct ifacaddr6	*ac_list;
	rwlock_t		lock;
	refcount_t		refcnt;
	__u32			if_flags;
	int			dead;

	u32			desync_factor;
	u8			rndid[8];
	struct list_head	tempaddr_list;

	struct in6_addr		token;

	struct neigh_parms	*nd_parms;
	struct ipv6_devconf	cnf;
	struct ipv6_devstat	stats;

	struct timer_list	rs_timer;
	__s32			rs_interval;	/* in jiffies */
	__u8			rs_probes;

	unsigned long		tstamp; /* ipv6InterfaceTable update timestamp */
	struct rcu_head		rcu;
};

static inline void ipv6_eth_mc_map(const struct in6_addr *addr, char *buf)
{
	/*
	 *	+-------+-------+-------+-------+-------+-------+
	 *      |   33  |   33  | DST13 | DST14 | DST15 | DST16 |
	 *      +-------+-------+-------+-------+-------+-------+
	 */

	buf[0]= 0x33;
	buf[1]= 0x33;

	memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32));
}

static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
{
	buf[0] = 0x00;
}

static inline void ipv6_ib_mc_map(const struct in6_addr *addr,
				  const unsigned char *broadcast, char *buf)
{
	unsigned char scope = broadcast[5] & 0xF;

	buf[0]  = 0;		/* Reserved */
	buf[1]  = 0xff;		/* Multicast QPN */
	buf[2]  = 0xff;
	buf[3]  = 0xff;
	buf[4]  = 0xff;
	buf[5]  = 0x10 | scope;	/* scope from broadcast address */
	buf[6]  = 0x60;		/* IPv6 signature */
	buf[7]  = 0x1b;
	buf[8]  = broadcast[8];	/* P_Key */
	buf[9]  = broadcast[9];
	memcpy(buf + 10, addr->s6_addr + 6, 10);
}

static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr,
				    const unsigned char *broadcast, char *buf)
{
	if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) {
		memcpy(buf, broadcast, 4);
	} else {
		/* v4mapped? */
		if ((addr->s6_addr32[0] | addr->s6_addr32[1] |
		     (addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0)
			return -EINVAL;
		memcpy(buf, &addr->s6_addr32[3], 4);
	}
	return 0;
}

#endif
Commit	Line	Data
1da177e4 LT	1	/*
	2	* inet6 interface/address list definitions
	3	* Linux INET6 implementation
	4	*
	5	* Authors:
	6	* Pedro Roque <roque@di.fc.ul.pt>
	7	*
	8	*
	9	* This program is free software; you can redistribute it and/or
	10	* modify it under the terms of the GNU General Public License
	11	* as published by the Free Software Foundation; either version
	12	* 2 of the License, or (at your option) any later version.
	13	*/
	14
	15	#ifndef _NET_IF_INET6_H
	16	#define _NET_IF_INET6_H
	17
	18	#include <net/snmp.h>
	19	#include <linux/ipv6.h>
1be92460	20	#include <linux/refcount.h>
1da177e4 LT	21
	22	/* inet6_dev.if_flags */
	23
	24	#define IF_RA_OTHERCONF 0x80
	25	#define IF_RA_MANAGED 0x40
	26	#define IF_RA_RCVD 0x20
	27	#define IF_RS_SENT 0x10
3c21edbd	28	#define IF_READY 0x80000000
1da177e4 LT	29
	30	/* prefix flags */
	31	#define IF_PREFIX_ONLINK 0x01
	32	#define IF_PREFIX_AUTOCONF 0x02
	33
e9d3e084	34	enum {
c15b1cca	35	INET6_IFADDR_STATE_PREDAD,
e9d3e084 HX	36	INET6_IFADDR_STATE_DAD,
e9d3e084 HX	37	INET6_IFADDR_STATE_POSTDAD,
c15b1cca	38	INET6_IFADDR_STATE_ERRDAD,
e9d3e084 HX	39	INET6_IFADDR_STATE_DEAD,
	40	};
	41
fd2c3ef7	42	struct inet6_ifaddr {
1da177e4 LT	43	struct in6_addr addr;
1da177e4 LT	44	__u32 prefix_len;
8e8e676d	45
76f793e3	46	/* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */
1da177e4 LT	47	__u32 valid_lft;
1da177e4 LT	48	__u32 prefered_lft;
271201c0	49	refcount_t refcnt;
1da177e4	50	spinlock_t lock;
e9d3e084 HX	51
e9d3e084 HX	52	int state;
1da177e4	53
479840ff	54	__u32 flags;
b7b1bfce	55	__u8 dad_probes;
5f40ef77	56	__u8 stable_privacy_retry;
1da177e4 LT	57
1da177e4 LT	58	__u16 scope;
adc176c5	59	__u64 dad_nonce;
1da177e4	60
04ec5cfc RK	61	unsigned long cstamp; /* created timestamp */
	62	unsigned long tstamp; /* updated timestamp */
	63
c15b1cca	64	struct delayed_work dad_work;
1da177e4 LT	65
	66	struct inet6_dev *idev;
	67	struct rt6_info *rt;
	68
c2e21293	69	struct hlist_node addr_lst;
502a2ffd	70	struct list_head if_list;
1da177e4	71
372e6c8f	72	struct list_head tmp_list;
1da177e4 LT	73	struct inet6_ifaddr *ifpub;
1da177e4 LT	74	int regen_count;
5d9efa7e	75
617fe29d DB	76	bool tokenized;
617fe29d DB	77
5c578aed	78	struct rcu_head rcu;
caeaba79	79	struct in6_addr peer_addr;
1da177e4 LT	80	};
1da177e4 LT	81
fd2c3ef7	82	struct ip6_sf_socklist {
1da177e4 LT	83	unsigned int sl_max;
	84	unsigned int sl_count;
	85	struct in6_addr sl_addr[0];
	86	};
	87
	88	#define IP6_SFLSIZE(count) (sizeof(struct ip6_sf_socklist) + \
	89	(count) * sizeof(struct in6_addr))
	90
	91	#define IP6_SFBLOCK 10 /* allocate this many at once */
	92
fd2c3ef7	93	struct ipv6_mc_socklist {
1da177e4 LT	94	struct in6_addr addr;
1da177e4 LT	95	int ifindex;
456b61bc	96	struct ipv6_mc_socklist __rcu *next;
5ab4a6c8	97	rwlock_t sflock;
1da177e4 LT	98	unsigned int sfmode; /* MCAST_{INCLUDE,EXCLUDE} */
1da177e4 LT	99	struct ip6_sf_socklist *sflist;
456b61bc	100	struct rcu_head rcu;
1da177e4 LT	101	};
1da177e4 LT	102
fd2c3ef7	103	struct ip6_sf_list {
1da177e4 LT	104	struct ip6_sf_list *sf_next;
	105	struct in6_addr sf_addr;
	106	unsigned long sf_count[2]; /* include/exclude counts */
	107	unsigned char sf_gsresp; /* include in g & s response? */
	108	unsigned char sf_oldin; /* change state */
	109	unsigned char sf_crcount; /* retrans. left to send */
	110	};
	111
	112	#define MAF_TIMER_RUNNING 0x01
	113	#define MAF_LAST_REPORTER 0x02
	114	#define MAF_LOADED 0x04
	115	#define MAF_NOREPORT 0x08
	116	#define MAF_GSQUERY 0x10
	117
fd2c3ef7	118	struct ifmcaddr6 {
1da177e4 LT	119	struct in6_addr mca_addr;
	120	struct inet6_dev *idev;
	121	struct ifmcaddr6 *next;
	122	struct ip6_sf_list *mca_sources;
	123	struct ip6_sf_list *mca_tomb;
	124	unsigned int mca_sfmode;
246f19d1	125	unsigned char mca_crcount;
1da177e4 LT	126	unsigned long mca_sfcount[2];
1da177e4 LT	127	struct timer_list mca_timer;
95c96174	128	unsigned int mca_flags;
1da177e4	129	int mca_users;
d3981bc6	130	refcount_t mca_refcnt;
1da177e4	131	spinlock_t mca_lock;
1da177e4 LT	132	unsigned long mca_cstamp;
	133	unsigned long mca_tstamp;
	134	};
	135
	136	/* Anycast stuff */
	137
fd2c3ef7	138	struct ipv6_ac_socklist {
1da177e4 LT	139	struct in6_addr acl_addr;
	140	int acl_ifindex;
	141	struct ipv6_ac_socklist *acl_next;
	142	};
	143
fd2c3ef7	144	struct ifacaddr6 {
1da177e4 LT	145	struct in6_addr aca_addr;
	146	struct inet6_dev *aca_idev;
	147	struct rt6_info *aca_rt;
	148	struct ifacaddr6 *aca_next;
	149	int aca_users;
affa78bc	150	refcount_t aca_refcnt;
1da177e4 LT	151	unsigned long aca_cstamp;
	152	unsigned long aca_tstamp;
	153	};
	154
	155	#define IFA_HOST IPV6_ADDR_LOOPBACK
	156	#define IFA_LINK IPV6_ADDR_LINKLOCAL
	157	#define IFA_SITE IPV6_ADDR_SITELOCAL
1da177e4 LT	158
	159	struct ipv6_devstat {
	160	struct proc_dir_entry *proc_dir_entry;
a11d206d	161	DEFINE_SNMP_STAT(struct ipstats_mib, ipv6);
be281e55 ED	162	DEFINE_SNMP_STAT_ATOMIC(struct icmpv6_mib_device, icmpv6dev);
be281e55 ED	163	DEFINE_SNMP_STAT_ATOMIC(struct icmpv6msg_mib_device, icmpv6msgdev);
1da177e4 LT	164	};
1da177e4 LT	165
fd2c3ef7	166	struct inet6_dev {
502a2ffd	167	struct net_device *dev;
1da177e4	168
502a2ffd	169	struct list_head addr_list;
1da177e4 LT	170
	171	struct ifmcaddr6 *mc_list;
	172	struct ifmcaddr6 *mc_tomb;
6457d26b	173	spinlock_t mc_lock;
89225d1c DB	174
89225d1c DB	175	unsigned char mc_qrv; /* Query Robustness Variable */
1da177e4 LT	176	unsigned char mc_gq_running;
1da177e4 LT	177	unsigned char mc_ifc_count;
b173ee48	178	unsigned char mc_dad_count;
89225d1c DB	179
	180	unsigned long mc_v1_seen; /* Max time we stay in MLDv1 mode */
	181	unsigned long mc_qi; /* Query Interval */
	182	unsigned long mc_qri; /* Query Response Interval */
4e7e5cfe	183	unsigned long mc_maxdelay;
89225d1c	184
1da177e4 LT	185	struct timer_list mc_gq_timer; /* general query timer */
1da177e4 LT	186	struct timer_list mc_ifc_timer; /* interface change timer */
b173ee48	187	struct timer_list mc_dad_timer; /* dad complete mc timer */
1da177e4 LT	188
	189	struct ifacaddr6 *ac_list;
	190	rwlock_t lock;
1be92460	191	refcount_t refcnt;
1da177e4 LT	192	__u32 if_flags;
	193	int dead;
	194
76506a98	195	u32 desync_factor;
1da177e4	196	u8 rndid[8];
372e6c8f	197	struct list_head tempaddr_list;
1da177e4	198
f53adae4 DB	199	struct in6_addr token;
f53adae4 DB	200
1da177e4	201	struct neigh_parms *nd_parms;
1da177e4 LT	202	struct ipv6_devconf cnf;
1da177e4 LT	203	struct ipv6_devstat stats;
b7b1bfce HFS	204
b7b1bfce HFS	205	struct timer_list rs_timer;
bd11f074	206	__s32 rs_interval; /* in jiffies */
b7b1bfce HFS	207	__u8 rs_probes;
b7b1bfce HFS	208
1da177e4	209	unsigned long tstamp; /* ipv6InterfaceTable update timestamp */
8814c4b5	210	struct rcu_head rcu;
1da177e4 LT	211	};
1da177e4 LT	212
b71d1d42	213	static inline void ipv6_eth_mc_map(const struct in6_addr addr, char buf)
1da177e4 LT	214	{
	215	/*
	216	* +-------+-------+-------+-------+-------+-------+
	217	* \| 33 \| 33 \| DST13 \| DST14 \| DST15 \| DST16 \|
	218	* +-------+-------+-------+-------+-------+-------+
	219	*/
	220
	221	buf[0]= 0x33;
	222	buf[1]= 0x33;
	223
	224	memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32));
	225	}
	226
1da177e4 LT	227	static inline void ipv6_arcnet_mc_map(const struct in6_addr addr, char buf)
	228	{
	229	buf[0] = 0x00;
	230	}
	231
a9e527e3 RM	232	static inline void ipv6_ib_mc_map(const struct in6_addr *addr,
a9e527e3 RM	233	const unsigned char broadcast, char buf)
1da177e4	234	{
a9e527e3 RM	235	unsigned char scope = broadcast[5] & 0xF;
a9e527e3 RM	236
1da177e4 LT	237	buf[0] = 0; /* Reserved */
	238	buf[1] = 0xff; /* Multicast QPN */
	239	buf[2] = 0xff;
	240	buf[3] = 0xff;
	241	buf[4] = 0xff;
a9e527e3	242	buf[5] = 0x10 \| scope; /* scope from broadcast address */
1da177e4 LT	243	buf[6] = 0x60; /* IPv6 signature */
1da177e4 LT	244	buf[7] = 0x1b;
a9e527e3 RM	245	buf[8] = broadcast[8]; /* P_Key */
a9e527e3 RM	246	buf[9] = broadcast[9];
1da177e4 LT	247	memcpy(buf + 10, addr->s6_addr + 6, 10);
1da177e4 LT	248	}
93ca3bb5 TT	249
	250	static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr,
	251	const unsigned char broadcast, char buf)
	252	{
	253	if ((broadcast[0] \| broadcast[1] \| broadcast[2] \| broadcast[3]) != 0) {
	254	memcpy(buf, broadcast, 4);
	255	} else {
	256	/* v4mapped? */
	257	if ((addr->s6_addr32[0] \| addr->s6_addr32[1] \|
	258	(addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0)
	259	return -EINVAL;
	260	memcpy(buf, &addr->s6_addr32[3], 4);
	261	}
	262	return 0;
	263	}
	264
1da177e4	265	#endif