/*
   *	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>
  
  /* 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;
  	atomic_t		refcnt;
  	spinlock_t		lock;
  
  	int			state;
  
  	__u32			flags;
  	__u8			dad_probes;
  	__u8			stable_privacy_retry;
  
  	__u16			scope;
  
  	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;
  	atomic_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;
  	atomic_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;
  	atomic_t		refcnt;
  	__u32			if_flags;
  	int			dead;
  
  	u8			rndid[8];
  	struct timer_list	regen_timer;
  	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;
  	__u8			rs_probes;
  
  	__u8			addr_gen_mode;
  	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