[linux-block.git] / include / net / if_inet6.h

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 *	inet6 interface/address list definitions
 *	Linux INET6 implementation 
 *
 *	Authors:
 *	Pedro Roque		<roque@di.fc.ul.pt>	
 */

#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;
	__u32			rt_priority;

	/* 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 fib6_info	*rt;

	struct hlist_node	addr_lst;
	struct list_head	if_list;
	/*
	 * Used to safely traverse idev->addr_list in process context
	 * if the idev->lock needed to protect idev->addr_list cannot be held.
	 * In that case, add the items to this list temporarily and iterate
	 * without holding idev->lock.
	 * See addrconf_ifdown and dev_forward_change.
	 */
	struct list_head	if_list_aux;

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

	bool			tokenized;

	u8			ifa_proto;

	struct rcu_head		rcu;
	struct in6_addr		peer_addr;
};

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

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

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

struct ip6_sf_list {
	struct ip6_sf_list __rcu *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 */
	struct rcu_head		rcu;
};

#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	__rcu *next;
	struct ip6_sf_list	__rcu *mca_sources;
	struct ip6_sf_list	__rcu *mca_tomb;
	unsigned int		mca_sfmode;
	unsigned char		mca_crcount;
	unsigned long		mca_sfcount[2];
	struct delayed_work	mca_work;
	unsigned int		mca_flags;
	int			mca_users;
	refcount_t		mca_refcnt;
	unsigned long		mca_cstamp;
	unsigned long		mca_tstamp;
	struct rcu_head		rcu;
};

/* 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 fib6_info	*aca_rt;
	struct ifacaddr6	*aca_next;
	struct hlist_node	aca_addr_lst;
	int			aca_users;
	refcount_t		aca_refcnt;
	unsigned long		aca_cstamp;
	unsigned long		aca_tstamp;
	struct rcu_head		rcu;
};

#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;
	netdevice_tracker	dev_tracker;

	struct list_head	addr_list;

	struct ifmcaddr6	__rcu *mc_list;
	struct ifmcaddr6	__rcu *mc_tomb;

	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 delayed_work	mc_gq_work;	/* general query work */
	struct delayed_work	mc_ifc_work;	/* interface change work */
	struct delayed_work	mc_dad_work;	/* dad complete mc work */
	struct delayed_work	mc_query_work;	/* mld query work */
	struct delayed_work	mc_report_work;	/* mld report work */

	struct sk_buff_head	mc_query_queue;		/* mld query queue */
	struct sk_buff_head	mc_report_queue;	/* mld report queue */

	spinlock_t		mc_query_lock;	/* mld query queue lock */
	spinlock_t		mc_report_lock;	/* mld query report lock */
	struct mutex		mc_lock;	/* mld global lock */

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

	u32			desync_factor;
	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;

	unsigned int		ra_mtu;
};

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
2874c5fd	1	/* SPDX-License-Identifier: GPL-2.0-or-later */
1da177e4 LT	2	/*
	3	* inet6 interface/address list definitions
	4	* Linux INET6 implementation
	5	*
	6	* Authors:
	7	* Pedro Roque <roque@di.fc.ul.pt>
1da177e4 LT	8	*/
	9
	10	#ifndef _NET_IF_INET6_H
	11	#define _NET_IF_INET6_H
	12
	13	#include <net/snmp.h>
	14	#include <linux/ipv6.h>
1be92460	15	#include <linux/refcount.h>
1da177e4 LT	16
	17	/* inet6_dev.if_flags */
	18
	19	#define IF_RA_OTHERCONF 0x80
	20	#define IF_RA_MANAGED 0x40
	21	#define IF_RA_RCVD 0x20
	22	#define IF_RS_SENT 0x10
3c21edbd	23	#define IF_READY 0x80000000
1da177e4 LT	24
	25	/* prefix flags */
	26	#define IF_PREFIX_ONLINK 0x01
	27	#define IF_PREFIX_AUTOCONF 0x02
	28
e9d3e084	29	enum {
c15b1cca	30	INET6_IFADDR_STATE_PREDAD,
e9d3e084 HX	31	INET6_IFADDR_STATE_DAD,
e9d3e084 HX	32	INET6_IFADDR_STATE_POSTDAD,
c15b1cca	33	INET6_IFADDR_STATE_ERRDAD,
e9d3e084 HX	34	INET6_IFADDR_STATE_DEAD,
	35	};
	36
fd2c3ef7	37	struct inet6_ifaddr {
1da177e4 LT	38	struct in6_addr addr;
1da177e4 LT	39	__u32 prefix_len;
8308f3ff	40	__u32 rt_priority;
8e8e676d	41
76f793e3	42	/* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */
1da177e4 LT	43	__u32 valid_lft;
1da177e4 LT	44	__u32 prefered_lft;
271201c0	45	refcount_t refcnt;
1da177e4	46	spinlock_t lock;
e9d3e084 HX	47
e9d3e084 HX	48	int state;
1da177e4	49
479840ff	50	__u32 flags;
b7b1bfce	51	__u8 dad_probes;
5f40ef77	52	__u8 stable_privacy_retry;
1da177e4 LT	53
1da177e4 LT	54	__u16 scope;
adc176c5	55	__u64 dad_nonce;
1da177e4	56
04ec5cfc RK	57	unsigned long cstamp; /* created timestamp */
	58	unsigned long tstamp; /* updated timestamp */
	59
c15b1cca	60	struct delayed_work dad_work;
1da177e4 LT	61
1da177e4 LT	62	struct inet6_dev *idev;
8d1c802b	63	struct fib6_info *rt;
1da177e4	64
c2e21293	65	struct hlist_node addr_lst;
502a2ffd	66	struct list_head if_list;
51454ea4 ND	67	/*
	68	* Used to safely traverse idev->addr_list in process context
	69	* if the idev->lock needed to protect idev->addr_list cannot be held.
	70	* In that case, add the items to this list temporarily and iterate
	71	* without holding idev->lock.
	72	* See addrconf_ifdown and dev_forward_change.
	73	*/
	74	struct list_head if_list_aux;
1da177e4	75
372e6c8f	76	struct list_head tmp_list;
1da177e4 LT	77	struct inet6_ifaddr *ifpub;
1da177e4 LT	78	int regen_count;
5d9efa7e	79
617fe29d DB	80	bool tokenized;
617fe29d DB	81
47f0bd50 JL	82	u8 ifa_proto;
47f0bd50 JL	83
5c578aed	84	struct rcu_head rcu;
caeaba79	85	struct in6_addr peer_addr;
1da177e4 LT	86	};
1da177e4 LT	87
fd2c3ef7	88	struct ip6_sf_socklist {
1da177e4 LT	89	unsigned int sl_max;
1da177e4 LT	90	unsigned int sl_count;
882ba1f7	91	struct rcu_head rcu;
0fa39d6d	92	struct in6_addr sl_addr[];
1da177e4 LT	93	};
1da177e4 LT	94
1da177e4 LT	95	#define IP6_SFBLOCK 10 /* allocate this many at once */
1da177e4 LT	96
fd2c3ef7	97	struct ipv6_mc_socklist {
1da177e4 LT	98	struct in6_addr addr;
1da177e4 LT	99	int ifindex;
14105c19	100	unsigned int sfmode; /* MCAST_{INCLUDE,EXCLUDE} */
456b61bc	101	struct ipv6_mc_socklist __rcu *next;
882ba1f7	102	struct ip6_sf_socklist __rcu *sflist;
456b61bc	103	struct rcu_head rcu;
1da177e4 LT	104	};
1da177e4 LT	105
fd2c3ef7	106	struct ip6_sf_list {
4b200e39	107	struct ip6_sf_list __rcu *sf_next;
1da177e4 LT	108	struct in6_addr sf_addr;
	109	unsigned long sf_count[2]; /* include/exclude counts */
	110	unsigned char sf_gsresp; /* include in g & s response? */
	111	unsigned char sf_oldin; /* change state */
	112	unsigned char sf_crcount; /* retrans. left to send */
4b200e39	113	struct rcu_head rcu;
1da177e4 LT	114	};
	115
	116	#define MAF_TIMER_RUNNING 0x01
	117	#define MAF_LAST_REPORTER 0x02
	118	#define MAF_LOADED 0x04
	119	#define MAF_NOREPORT 0x08
	120	#define MAF_GSQUERY 0x10
	121
fd2c3ef7	122	struct ifmcaddr6 {
1da177e4 LT	123	struct in6_addr mca_addr;
1da177e4 LT	124	struct inet6_dev *idev;
88e2ca30	125	struct ifmcaddr6 __rcu *next;
4b200e39 TY	126	struct ip6_sf_list __rcu *mca_sources;
4b200e39 TY	127	struct ip6_sf_list __rcu *mca_tomb;
1da177e4	128	unsigned int mca_sfmode;
246f19d1	129	unsigned char mca_crcount;
1da177e4	130	unsigned long mca_sfcount[2];
2d9a93b4	131	struct delayed_work mca_work;
95c96174	132	unsigned int mca_flags;
1da177e4	133	int mca_users;
d3981bc6	134	refcount_t mca_refcnt;
1da177e4 LT	135	unsigned long mca_cstamp;
1da177e4 LT	136	unsigned long mca_tstamp;
88e2ca30	137	struct rcu_head rcu;
1da177e4 LT	138	};
	139
	140	/* Anycast stuff */
	141
fd2c3ef7	142	struct ipv6_ac_socklist {
1da177e4 LT	143	struct in6_addr acl_addr;
	144	int acl_ifindex;
	145	struct ipv6_ac_socklist *acl_next;
	146	};
	147
fd2c3ef7	148	struct ifacaddr6 {
1da177e4	149	struct in6_addr aca_addr;
8d1c802b	150	struct fib6_info *aca_rt;
1da177e4	151	struct ifacaddr6 *aca_next;
2384d025	152	struct hlist_node aca_addr_lst;
1da177e4	153	int aca_users;
affa78bc	154	refcount_t aca_refcnt;
1da177e4 LT	155	unsigned long aca_cstamp;
1da177e4 LT	156	unsigned long aca_tstamp;
2384d025	157	struct rcu_head rcu;
1da177e4 LT	158	};
	159
	160	#define IFA_HOST IPV6_ADDR_LOOPBACK
	161	#define IFA_LINK IPV6_ADDR_LINKLOCAL
	162	#define IFA_SITE IPV6_ADDR_SITELOCAL
1da177e4 LT	163
	164	struct ipv6_devstat {
	165	struct proc_dir_entry *proc_dir_entry;
a11d206d	166	DEFINE_SNMP_STAT(struct ipstats_mib, ipv6);
be281e55 ED	167	DEFINE_SNMP_STAT_ATOMIC(struct icmpv6_mib_device, icmpv6dev);
be281e55 ED	168	DEFINE_SNMP_STAT_ATOMIC(struct icmpv6msg_mib_device, icmpv6msgdev);
1da177e4 LT	169	};
1da177e4 LT	170
fd2c3ef7	171	struct inet6_dev {
502a2ffd	172	struct net_device *dev;
8c727003	173	netdevice_tracker dev_tracker;
1da177e4	174
502a2ffd	175	struct list_head addr_list;
1da177e4	176
88e2ca30 TY	177	struct ifmcaddr6 __rcu *mc_list;
88e2ca30 TY	178	struct ifmcaddr6 __rcu *mc_tomb;
89225d1c DB	179
89225d1c DB	180	unsigned char mc_qrv; /* Query Robustness Variable */
1da177e4 LT	181	unsigned char mc_gq_running;
1da177e4 LT	182	unsigned char mc_ifc_count;
b173ee48	183	unsigned char mc_dad_count;
89225d1c DB	184
	185	unsigned long mc_v1_seen; /* Max time we stay in MLDv1 mode */
	186	unsigned long mc_qi; /* Query Interval */
	187	unsigned long mc_qri; /* Query Response Interval */
4e7e5cfe	188	unsigned long mc_maxdelay;
89225d1c	189
2d9a93b4 TY	190	struct delayed_work mc_gq_work; /* general query work */
	191	struct delayed_work mc_ifc_work; /* interface change work */
	192	struct delayed_work mc_dad_work; /* dad complete mc work */
f185de28 TY	193	struct delayed_work mc_query_work; /* mld query work */
	194	struct delayed_work mc_report_work; /* mld report work */
	195
	196	struct sk_buff_head mc_query_queue; /* mld query queue */
	197	struct sk_buff_head mc_report_queue; /* mld report queue */
	198
	199	spinlock_t mc_query_lock; /* mld query queue lock */
	200	spinlock_t mc_report_lock; /* mld query report lock */
63ed8de4	201	struct mutex mc_lock; /* mld global lock */
1da177e4 LT	202
	203	struct ifacaddr6 *ac_list;
	204	rwlock_t lock;
1be92460	205	refcount_t refcnt;
1da177e4 LT	206	__u32 if_flags;
	207	int dead;
	208
76506a98	209	u32 desync_factor;
372e6c8f	210	struct list_head tempaddr_list;
1da177e4	211
f53adae4 DB	212	struct in6_addr token;
f53adae4 DB	213
1da177e4	214	struct neigh_parms *nd_parms;
1da177e4 LT	215	struct ipv6_devconf cnf;
1da177e4 LT	216	struct ipv6_devstat stats;
b7b1bfce HFS	217
b7b1bfce HFS	218	struct timer_list rs_timer;
bd11f074	219	__s32 rs_interval; /* in jiffies */
b7b1bfce HFS	220	__u8 rs_probes;
b7b1bfce HFS	221
1da177e4	222	unsigned long tstamp; /* ipv6InterfaceTable update timestamp */
8814c4b5	223	struct rcu_head rcu;
49b99da2 RY	224
49b99da2 RY	225	unsigned int ra_mtu;
1da177e4 LT	226	};
1da177e4 LT	227
b71d1d42	228	static inline void ipv6_eth_mc_map(const struct in6_addr addr, char buf)
1da177e4 LT	229	{
	230	/*
	231	* +-------+-------+-------+-------+-------+-------+
	232	* \| 33 \| 33 \| DST13 \| DST14 \| DST15 \| DST16 \|
	233	* +-------+-------+-------+-------+-------+-------+
	234	*/
	235
	236	buf[0]= 0x33;
	237	buf[1]= 0x33;
	238
	239	memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32));
	240	}
	241
1da177e4 LT	242	static inline void ipv6_arcnet_mc_map(const struct in6_addr addr, char buf)
	243	{
	244	buf[0] = 0x00;
	245	}
	246
a9e527e3 RM	247	static inline void ipv6_ib_mc_map(const struct in6_addr *addr,
a9e527e3 RM	248	const unsigned char broadcast, char buf)
1da177e4	249	{
a9e527e3 RM	250	unsigned char scope = broadcast[5] & 0xF;
a9e527e3 RM	251
1da177e4 LT	252	buf[0] = 0; /* Reserved */
	253	buf[1] = 0xff; /* Multicast QPN */
	254	buf[2] = 0xff;
	255	buf[3] = 0xff;
	256	buf[4] = 0xff;
a9e527e3	257	buf[5] = 0x10 \| scope; /* scope from broadcast address */
1da177e4 LT	258	buf[6] = 0x60; /* IPv6 signature */
1da177e4 LT	259	buf[7] = 0x1b;
a9e527e3 RM	260	buf[8] = broadcast[8]; /* P_Key */
a9e527e3 RM	261	buf[9] = broadcast[9];
1da177e4 LT	262	memcpy(buf + 10, addr->s6_addr + 6, 10);
1da177e4 LT	263	}
93ca3bb5 TT	264
	265	static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr,
	266	const unsigned char broadcast, char buf)
	267	{
	268	if ((broadcast[0] \| broadcast[1] \| broadcast[2] \| broadcast[3]) != 0) {
	269	memcpy(buf, broadcast, 4);
	270	} else {
	271	/* v4mapped? */
	272	if ((addr->s6_addr32[0] \| addr->s6_addr32[1] \|
	273	(addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0)
	274	return -EINVAL;
	275	memcpy(buf, &addr->s6_addr32[3], 4);
	276	}
	277	return 0;
	278	}
	279
1da177e4	280	#endif