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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.

 *

 *      Protocol Independent Multicast (PIM) data structures included

 *      Carlos Picoto (cap@di.fc.ul.pt)

 *

 */

#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 MRT_PIM         (MRT_BASE+8)    /* enable PIM code      */

#define SIOCGETVIFCNT   SIOCPROTOPRIVATE        /* IP protocol privates */

#define SIOCGETSGCNT    (SIOCPROTOPRIVATE+1)

#define SIOCGETRPF      (SIOCPROTOPRIVATE+2)

#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      0x2     /* NI */

#define VIFF_REGISTER   0x4     /* register vif */

/*

 *      Cache manipulation structures for mrouted and PIMd

 */

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    */

        unsigned int mfcc_pkt_cnt;              /* pkt count for src-grp */

        unsigned int mfcc_byte_cnt;

        unsigned int mfcc_wrong_if;

        int          mfcc_expire;

};

/*

 *      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

{

        __u32 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__

#include <net/sock.h>

#ifdef CONFIG_IP_MROUTE

static inline int ip_mroute_opt(int opt)

{

        return (opt >= MRT_BASE) && (opt <= MRT_BASE + 10);

}

#else

static inline int ip_mroute_opt(int opt)

{

        return 0;

}

#endif

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

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

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

extern void ip_mr_init(void);

struct vif_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                */

        __be32          local,remote;           /* Addresses(remote for tunnels)*/

        int             link;                   /* Physical interface index     */

};

#define VIFF_STATIC 0x8000

struct mfc_cache

{

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

        __be32 mfc_mcastgrp;                    /* Group the entry belongs to   */

        __be32 mfc_origin;                      /* Source of packet             */

        vifi_t mfc_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[MAXVIFS];    /* TTL thresholds               */

                } res;

        } mfc_un;

};

#define MFC_STATIC              1

#define MFC_NOTIFY              2

#define MFC_LINES               64

#ifdef __BIG_ENDIAN

#define MFC_HASH(a,b)   (((((__force u32)(__be32)a)>>24)^(((__force u32)(__be32)b)>>26))&(MFC_LINES-1))

#else

#define MFC_HASH(a,b)   ((((__force u32)(__be32)a)^(((__force u32)(__be32)b)>>2))&(MFC_LINES-1))

#endif          

#endif

#define MFC_ASSERT_THRESH (3*HZ)                /* Maximal freq. of asserts */

/*

 *      Pseudo messages used by mrouted

 */

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

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

#define IGMPMSG_WHOLEPKT        3               /* For PIM Register processing */

#ifdef __KERNEL__

#define PIM_V1_VERSION          __constant_htonl(0x10000000)

#define PIM_V1_REGISTER         1

#define PIM_VERSION             2

#define PIM_REGISTER            1

#define PIM_NULL_REGISTER       __constant_htonl(0x40000000)

/* PIMv2 register message header layout (ietf-draft-idmr-pimvsm-v2-00.ps */

struct pimreghdr

{

        __u8    type;

        __u8    reserved;

        __be16  csum;

        __be32  flags;

};

extern int pim_rcv_v1(struct sk_buff *);

struct rtmsg;

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

#endif

#endif