include/net/if_inet6.h - linux - Git at Google

 /* 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[] __counted_by(sl_max);
 };

 #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
	/* 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[] __counted_by(sl_max);
	};

	#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