/*
   *	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_DAD,
  	INET6_IFADDR_STATE_POSTDAD,
  	INET6_IFADDR_STATE_UP,
  	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;

  	spinlock_t		state_lock;
  
  	int			state;

  
  	__u8			probes;
  	__u8			flags;
  
  	__u16			scope;

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

  	struct timer_list	timer;
  
  	struct inet6_dev	*idev;
  	struct rt6_info		*rt;

  	struct hlist_node	addr_lst;

  	struct list_head	if_list;

  
  #ifdef CONFIG_IPV6_PRIVACY

  	struct list_head	tmp_list;

  	struct inet6_ifaddr	*ifpub;
  	int			regen_count;
  #endif

  	struct rcu_head		rcu;

  };

  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		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;
  	spinlock_t		aca_lock;
  	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;
  	unsigned char		mc_gq_running;
  	unsigned char		mc_ifc_count;

  	unsigned long		mc_v1_seen;
  	unsigned long		mc_maxdelay;

  	struct timer_list	mc_gq_timer;	/* general query timer */
  	struct timer_list	mc_ifc_timer;	/* interface change timer */
  
  	struct ifacaddr6	*ac_list;
  	rwlock_t		lock;
  	atomic_t		refcnt;
  	__u32			if_flags;
  	int			dead;
  
  #ifdef CONFIG_IPV6_PRIVACY
  	u8			rndid[8];

  	struct timer_list	regen_timer;

  	struct list_head	tempaddr_list;

  #endif
  
  	struct neigh_parms	*nd_parms;
  	struct inet6_dev	*next;
  	struct ipv6_devconf	cnf;
  	struct ipv6_devstat	stats;
  	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_tr_mc_map(const struct in6_addr *addr, char *buf)

  {
  	/* All nodes FF01::1, FF02::1, FF02::1:FFxx:xxxx */
  
  	if (((addr->s6_addr[0] == 0xFF) &&
  	    ((addr->s6_addr[1] == 0x01) || (addr->s6_addr[1] == 0x02)) &&
  	     (addr->s6_addr16[1] == 0) &&
  	     (addr->s6_addr32[1] == 0) &&
  	     (addr->s6_addr32[2] == 0) &&
  	     (addr->s6_addr16[6] == 0) &&
  	     (addr->s6_addr[15] == 1)) ||
  	    ((addr->s6_addr[0] == 0xFF) &&
  	     (addr->s6_addr[1] == 0x02) &&
  	     (addr->s6_addr16[1] == 0) &&
  	     (addr->s6_addr32[1] == 0) &&
  	     (addr->s6_addr16[4] == 0) &&
  	     (addr->s6_addr[10] == 0) &&
  	     (addr->s6_addr[11] == 1) &&
  	     (addr->s6_addr[12] == 0xff)))
  	{
  		buf[0]=0xC0;
  		buf[1]=0x00;
  		buf[2]=0x01;
  		buf[3]=0x00;
  		buf[4]=0x00;
  		buf[5]=0x00;
  	/* All routers FF0x::2 */
  	} else if ((addr->s6_addr[0] ==0xff) &&
  		((addr->s6_addr[1] & 0xF0) == 0) &&
  		(addr->s6_addr16[1] == 0) &&
  		(addr->s6_addr32[1] == 0) &&
  		(addr->s6_addr32[2] == 0) &&
  		(addr->s6_addr16[6] == 0) &&
  		(addr->s6_addr[15] == 2))
  	{
  		buf[0]=0xC0;
  		buf[1]=0x00;
  		buf[2]=0x02;
  		buf[3]=0x00;
  		buf[4]=0x00;
  		buf[5]=0x00;
  	} else {
  		unsigned char i ; 
  		
  		i = addr->s6_addr[15] & 7 ; 
  		buf[0]=0xC0;
  		buf[1]=0x00;
  		buf[2]=0x00;
  		buf[3]=0x01 << i ; 
  		buf[4]=0x00;
  		buf[5]=0x00;
  	}
  }
  
  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