#ifndef __LINUX_MROUTE6_H
  #define __LINUX_MROUTE6_H
  
  #include <linux/types.h>
  #include <linux/sockios.h>
  
  /*
   *	Based on the MROUTING 3.5 defines primarily to keep
   *	source compatibility with BSD.
   *
   *	See the pim6sd code for the original history.
   *
   *      Protocol Independent Multicast (PIM) data structures included
   *      Carlos Picoto (cap@di.fc.ul.pt)
   *
   */
  
  #define MRT6_BASE	200
  #define MRT6_INIT	(MRT6_BASE)	/* Activate the kernel mroute code 	*/
  #define MRT6_DONE	(MRT6_BASE+1)	/* Shutdown the kernel mroute		*/
  #define MRT6_ADD_MIF	(MRT6_BASE+2)	/* Add a virtual interface		*/
  #define MRT6_DEL_MIF	(MRT6_BASE+3)	/* Delete a virtual interface		*/
  #define MRT6_ADD_MFC	(MRT6_BASE+4)	/* Add a multicast forwarding entry	*/
  #define MRT6_DEL_MFC	(MRT6_BASE+5)	/* Delete a multicast forwarding entry	*/
  #define MRT6_VERSION	(MRT6_BASE+6)	/* Get the kernel multicast version	*/

  #define MRT6_ASSERT	(MRT6_BASE+7)	/* Activate PIM assert mode		*/

  #define MRT6_PIM	(MRT6_BASE+8)	/* enable PIM code			*/
  #define MRT6_TABLE	(MRT6_BASE+9)	/* Specify mroute table ID		*/

  
  #define SIOCGETMIFCNT_IN6	SIOCPROTOPRIVATE	/* IP protocol privates */
  #define SIOCGETSGCNT_IN6	(SIOCPROTOPRIVATE+1)
  #define SIOCGETRPF	(SIOCPROTOPRIVATE+2)
  
  #define MAXMIFS		32
  typedef unsigned long mifbitmap_t;	/* User mode code depends on this lot */
  typedef unsigned short mifi_t;
  #define ALL_MIFS	((mifi_t)(-1))
  
  #ifndef IF_SETSIZE
  #define IF_SETSIZE	256
  #endif
  
  typedef	__u32		if_mask;
  #define NIFBITS (sizeof(if_mask) * 8)        /* bits per mask */
  
  #if !defined(__KERNEL__) && !defined(DIV_ROUND_UP)
  #define	DIV_ROUND_UP(x,y)	(((x) + ((y) - 1)) / (y))
  #endif
  
  typedef struct if_set {
  	if_mask ifs_bits[DIV_ROUND_UP(IF_SETSIZE, NIFBITS)];
  } if_set;
  
  #define IF_SET(n, p)    ((p)->ifs_bits[(n)/NIFBITS] |= (1 << ((n) % NIFBITS)))
  #define IF_CLR(n, p)    ((p)->ifs_bits[(n)/NIFBITS] &= ~(1 << ((n) % NIFBITS)))
  #define IF_ISSET(n, p)  ((p)->ifs_bits[(n)/NIFBITS] & (1 << ((n) % NIFBITS)))
  #define IF_COPY(f, t)   bcopy(f, t, sizeof(*(f)))
  #define IF_ZERO(p)      bzero(p, sizeof(*(p)))
  
  /*
   *	Passed by mrouted for an MRT_ADD_MIF - again we use the
   *	mrouted 3.6 structures for compatibility
   */
  
  struct mif6ctl {
  	mifi_t	mif6c_mifi;		/* Index of MIF */
  	unsigned char mif6c_flags;	/* MIFF_ flags */
  	unsigned char vifc_threshold;	/* ttl limit */

  	__u16	 mif6c_pifi;		/* the index of the physical IF */

  	unsigned int vifc_rate_limit;	/* Rate limiter values (NI) */
  };
  
  #define MIFF_REGISTER	0x1	/* register vif	*/
  
  /*
   *	Cache manipulation structures for mrouted and PIMd
   */

  struct mf6cctl {

  	struct sockaddr_in6 mf6cc_origin;		/* Origin of mcast	*/
  	struct sockaddr_in6 mf6cc_mcastgrp;		/* Group in question	*/
  	mifi_t	mf6cc_parent;			/* Where it arrived	*/
  	struct if_set mf6cc_ifset;		/* Where it is going */
  };
  
  /*
   *	Group count retrieval for pim6sd
   */

  struct sioc_sg_req6 {

  	struct sockaddr_in6 src;
  	struct sockaddr_in6 grp;
  	unsigned long pktcnt;
  	unsigned long bytecnt;
  	unsigned long wrong_if;
  };
  
  /*
   *	To get vif packet counts
   */

  struct sioc_mif_req6 {

  	mifi_t	mifi;		/* Which iface */
  	unsigned long icount;	/* In packets */
  	unsigned long ocount;	/* Out packets */
  	unsigned long ibytes;	/* In bytes */
  	unsigned long obytes;	/* Out bytes */
  };
  
  /*
   *	That's all usermode folks
   */
  
  #ifdef __KERNEL__

  #include <linux/pim.h>

  #include <linux/skbuff.h>	/* for struct sk_buff_head */

  #include <net/net_namespace.h>

  #ifdef CONFIG_IPV6_MROUTE
  static inline int ip6_mroute_opt(int opt)
  {
  	return (opt >= MRT6_BASE) && (opt <= MRT6_BASE + 10);
  }
  #else
  static inline int ip6_mroute_opt(int opt)
  {
  	return 0;
  }
  #endif
  
  struct sock;

  #ifdef CONFIG_IPV6_MROUTE

  extern int ip6_mroute_setsockopt(struct sock *, int, char __user *, unsigned int);

  extern int ip6_mroute_getsockopt(struct sock *, int, char __user *, int __user *);
  extern int ip6_mr_input(struct sk_buff *skb);
  extern int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg);

  extern int ip6mr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg);

  extern int ip6_mr_init(void);
  extern void ip6_mr_cleanup(void);

  #else
  static inline
  int ip6_mroute_setsockopt(struct sock *sock,

  			  int optname, char __user *optval, unsigned int optlen)

  {
  	return -ENOPROTOOPT;
  }
  
  static inline
  int ip6_mroute_getsockopt(struct sock *sock,
  			  int optname, char __user *optval, int __user *optlen)
  {
  	return -ENOPROTOOPT;
  }
  
  static inline
  int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg)
  {
  	return -ENOIOCTLCMD;
  }
  
  static inline int ip6_mr_init(void)
  {
  	return 0;
  }
  
  static inline void ip6_mr_cleanup(void)
  {
  	return;
  }
  #endif

  struct mif_device {

  	struct net_device 	*dev;			/* Device we are using */
  	unsigned long	bytes_in,bytes_out;
  	unsigned long	pkt_in,pkt_out;		/* Statistics 			*/
  	unsigned long	rate_limit;		/* Traffic shaping (NI) 	*/
  	unsigned char	threshold;		/* TTL threshold 		*/
  	unsigned short	flags;			/* Control flags 		*/
  	int		link;			/* Physical interface index	*/
  };
  
  #define VIFF_STATIC 0x8000

  struct mfc6_cache {

  	struct list_head list;

  	struct in6_addr mf6c_mcastgrp;			/* Group the entry belongs to 	*/
  	struct in6_addr mf6c_origin;			/* Source of packet 		*/
  	mifi_t mf6c_parent;			/* Source interface		*/
  	int mfc_flags;				/* Flags on line		*/
  
  	union {
  		struct {
  			unsigned long expires;
  			struct sk_buff_head unresolved;	/* Unresolved buffers		*/
  		} unres;
  		struct {
  			unsigned long last_assert;
  			int minvif;
  			int maxvif;
  			unsigned long bytes;
  			unsigned long pkt;
  			unsigned long wrong_if;
  			unsigned char ttls[MAXMIFS];	/* TTL thresholds		*/
  		} res;
  	} mfc_un;
  };
  
  #define MFC_STATIC		1
  #define MFC_NOTIFY		2
  
  #define MFC6_LINES		64
  
  #define MFC6_HASH(a, g) (((__force u32)(a)->s6_addr32[0] ^ \
  			  (__force u32)(a)->s6_addr32[1] ^ \
  			  (__force u32)(a)->s6_addr32[2] ^ \
  			  (__force u32)(a)->s6_addr32[3] ^ \
  			  (__force u32)(g)->s6_addr32[0] ^ \
  			  (__force u32)(g)->s6_addr32[1] ^ \
  			  (__force u32)(g)->s6_addr32[2] ^ \
  			  (__force u32)(g)->s6_addr32[3]) % MFC6_LINES)
  
  #define MFC_ASSERT_THRESH (3*HZ)		/* Maximal freq. of asserts */
  
  #endif
  
  #ifdef __KERNEL__
  struct rtmsg;

  extern int ip6mr_get_route(struct net *net, struct sk_buff *skb,
  			   struct rtmsg *rtm, int nowait);

  
  #ifdef CONFIG_IPV6_MROUTE

  extern struct sock *mroute6_socket(struct net *net, struct sk_buff *skb);

  extern int ip6mr_sk_done(struct sock *sk);
  #else

  static inline struct sock *mroute6_socket(struct net *net, struct sk_buff *skb)
  {
  	return NULL;
  }
  static inline int ip6mr_sk_done(struct sock *sk)
  {
  	return 0;
  }

  #endif
  #endif
  
  /*
   * Structure used to communicate from kernel to multicast router.
   * We'll overlay the structure onto an MLD header (not an IPv6 heder like igmpmsg{}
   * used for IPv4 implementation). This is because this structure will be passed via an

   * IPv6 raw socket, on which an application will only receiver the payload i.e the data after

   * the IPv6 header and all the extension headers. (See section 3 of RFC 3542)
   */
  
  struct mrt6msg {
  #define MRT6MSG_NOCACHE		1

  #define MRT6MSG_WRONGMIF	2
  #define MRT6MSG_WHOLEPKT	3		/* used for use level encap */

  	__u8		im6_mbz;		/* must be zero		   */
  	__u8		im6_msgtype;		/* what type of message    */
  	__u16		im6_mif;		/* mif rec'd on		   */
  	__u32		im6_pad;		/* padding for 64 bit arch */
  	struct in6_addr	im6_src, im6_dst;
  };
  
  #endif