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#ifndef __LINUX_MROUTE_H

#define __LINUX_MROUTE_H

#include <linux/sockios.h>

#include <linux/in.h>

/*

 *      Based on the MROUTING 3.5 defines primarily to keep

 *      source compatibility with BSD.

 *

 *      See the mrouted code for the original history.

 *

 */

#define MRT_BASE        200

#define MRT_INIT        (MRT_BASE)      /* Activate the kernel mroute code      */

#define MRT_DONE        (MRT_BASE+1)    /* Shutdown the kernel mroute           */

#define MRT_ADD_VIF     (MRT_BASE+2)    /* Add a virtual interface              */

#define MRT_DEL_VIF     (MRT_BASE+3)    /* Delete a virtual interface           */

#define MRT_ADD_MFC     (MRT_BASE+4)    /* Add a multicast forwarding entry     */

#define MRT_DEL_MFC     (MRT_BASE+5)    /* Delete a multicast forwarding entry  */

#define MRT_VERSION     (MRT_BASE+6)    /* Get the kernel multicast version     */

#define MRT_ASSERT      (MRT_BASE+7)    /* Activate PIM assert mode             */

#define SIOCGETVIFCNT   SIOCPROTOPRIVATE        /* IP protocol privates */

#define SIOCGETSGCNT    (SIOCPROTOPRIVATE+1)

#define MAXVIFS         32      

typedef unsigned long vifbitmap_t;      /* User mode code depends on this lot */

typedef unsigned short vifi_t;

#define ALL_VIFS        ((vifi_t)(-1))

/*

 *      Same idea as select

 */

#define VIFM_SET(n,m)   ((m)|=(1<<(n)))

#define VIFM_CLR(n,m)   ((m)&=~(1<<(n)))

#define VIFM_ISSET(n,m) ((m)&(1<<(n)))

#define VIFM_CLRALL(m)  ((m)=0)

#define VIFM_COPY(mfrom,mto)    ((mto)=(mfrom))

#define VIFM_SAME(m1,m2)        ((m1)==(m2))

/*

 *      Passed by mrouted for an MRT_ADD_VIF - again we use the

 *      mrouted 3.6 structures for compatibility

 */

struct vifctl {

        vifi_t  vifc_vifi;              /* Index of VIF */

        unsigned char vifc_flags;       /* VIFF_ flags */

        unsigned char vifc_threshold;   /* ttl limit */

        unsigned int vifc_rate_limit;   /* Rate limiter values (NI) */

        struct in_addr vifc_lcl_addr;   /* Our address */

        struct in_addr vifc_rmt_addr;   /* IPIP tunnel addr */

};

#define VIFF_TUNNEL     0x1             /* IPIP tunnel */

#define VIFF_SRCRT      0x02            /* NI */

/*

 *      Cache manipulation structures for mrouted

 */

struct mfcctl

{

        struct in_addr mfcc_origin;             /* Origin of mcast      */

        struct in_addr mfcc_mcastgrp;           /* Group in question    */

        vifi_t  mfcc_parent;                    /* Where it arrived     */

        unsigned char mfcc_ttls[MAXVIFS];       /* Where it is going    */

};

/*

 *      Group count retrieval for mrouted

 */

struct sioc_sg_req

{

        struct in_addr src;

        struct in_addr grp;

        unsigned long pktcnt;

        unsigned long bytecnt;

        unsigned long wrong_if;

};

/*

 *      To get vif packet counts

 */

struct sioc_vif_req

{

        vifi_t  vifi;           /* Which iface */

        unsigned long icount;   /* In packets */

        unsigned long ocount;   /* Out packets */

        unsigned long ibytes;   /* In bytes */

        unsigned long obytes;   /* Out bytes */

};

/*

 *      This is the format the mroute daemon expects to see IGMP control

 *      data. Magically happens to be like an IP packet as per the original

 */

struct igmpmsg

{

        unsigned long unused1,unused2;

        unsigned char im_msgtype;               /* What is this */

        unsigned char im_mbz;                   /* Must be zero */

        unsigned char im_vif;                   /* Interface (this ought to be a vifi_t!) */

        unsigned char unused3;

        struct in_addr im_src,im_dst;

};

/*

 *      That's all usermode folks

 */

#ifdef __KERNEL__

extern struct sock *mroute_socket;

extern int ip_mroute_setsockopt(struct sock *, int, char *, int);

extern int ip_mroute_getsockopt(struct sock *, int, char *, int *);

extern int ipmr_ioctl(struct sock *sk, int cmd, unsigned long arg);

extern void mroute_close(struct sock *sk);

extern void ipmr_forward(struct sk_buff *skb, int is_frag);

struct vif_device

{

        struct device   *dev;                   /* Device we are using */

        struct route    *rt_cache;              /* Tunnel route cache */

        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                */

        unsigned long   local,remote;           /* Addresses(remote for tunnels)*/

};

struct mfc_cache

{

        struct mfc_cache *next;                 /* Next entry on cache line     */

        __u32 mfc_mcastgrp;                     /* Group the entry belongs to   */

        __u32 mfc_origin;                       /* Source of packet             */

        vifi_t mfc_parent;                      /* Source interface             */

        struct timer_list mfc_timer;            /* Expiry timer                 */

        int mfc_flags;                          /* Flags on line                */

        struct sk_buff_head mfc_unresolved;     /* Unresolved buffers           */

        int mfc_queuelen;                       /* Unresolved buffer counter    */

        unsigned char mfc_ttls[MAXVIFS];        /* TTL thresholds               */

        unsigned long mfc_packets;              /* Packets on this entry        */

        unsigned long mfc_bytes;                /* Bytes on this entry          */

};

#define MFC_QUEUED              1

#define MFC_RESOLVED            2

#define MFC_LINES               64

#ifdef __BIG_ENDIAN

#define MFC_HASH(a,b)   ((((a)>>24)^((b)>>26))&(MFC_LINES-1))

#else

#define MFC_HASH(a,b)   (((a)^((b)>>2))&(MFC_LINES-1))

#endif          

#endif

/*

 *      Pseudo messages used by mrouted

 */

#define IGMPMSG_NOCACHE         1               /* Kernel cache fill request to mrouted */

#define IGMPMSG_WRONGVIF        2               /* For PIM assert processing (unused) */

#endif