linux/include/linux/mroute6.h
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   1#ifndef __LINUX_MROUTE6_H
   2#define __LINUX_MROUTE6_H
   3
   4#include <linux/types.h>
   5#include <linux/sockios.h>
   6
   7/*
   8 *      Based on the MROUTING 3.5 defines primarily to keep
   9 *      source compatibility with BSD.
  10 *
  11 *      See the pim6sd code for the original history.
  12 *
  13 *      Protocol Independent Multicast (PIM) data structures included
  14 *      Carlos Picoto (cap@di.fc.ul.pt)
  15 *
  16 */
  17
  18#define MRT6_BASE       200
  19#define MRT6_INIT       (MRT6_BASE)     /* Activate the kernel mroute code      */
  20#define MRT6_DONE       (MRT6_BASE+1)   /* Shutdown the kernel mroute           */
  21#define MRT6_ADD_MIF    (MRT6_BASE+2)   /* Add a virtual interface              */
  22#define MRT6_DEL_MIF    (MRT6_BASE+3)   /* Delete a virtual interface           */
  23#define MRT6_ADD_MFC    (MRT6_BASE+4)   /* Add a multicast forwarding entry     */
  24#define MRT6_DEL_MFC    (MRT6_BASE+5)   /* Delete a multicast forwarding entry  */
  25#define MRT6_VERSION    (MRT6_BASE+6)   /* Get the kernel multicast version     */
  26#define MRT6_ASSERT     (MRT6_BASE+7)   /* Activate PIM assert mode             */
  27#define MRT6_PIM        (MRT6_BASE+8)   /* enable PIM code                      */
  28#define MRT6_TABLE      (MRT6_BASE+9)   /* Specify mroute table ID              */
  29
  30#define SIOCGETMIFCNT_IN6       SIOCPROTOPRIVATE        /* IP protocol privates */
  31#define SIOCGETSGCNT_IN6        (SIOCPROTOPRIVATE+1)
  32#define SIOCGETRPF      (SIOCPROTOPRIVATE+2)
  33
  34#define MAXMIFS         32
  35typedef unsigned long mifbitmap_t;      /* User mode code depends on this lot */
  36typedef unsigned short mifi_t;
  37#define ALL_MIFS        ((mifi_t)(-1))
  38
  39#ifndef IF_SETSIZE
  40#define IF_SETSIZE      256
  41#endif
  42
  43typedef __u32           if_mask;
  44#define NIFBITS (sizeof(if_mask) * 8)        /* bits per mask */
  45
  46#if !defined(__KERNEL__)
  47#if !defined(DIV_ROUND_UP)
  48#define DIV_ROUND_UP(x,y)       (((x) + ((y) - 1)) / (y))
  49#endif
  50#endif
  51
  52typedef struct if_set {
  53        if_mask ifs_bits[DIV_ROUND_UP(IF_SETSIZE, NIFBITS)];
  54} if_set;
  55
  56#define IF_SET(n, p)    ((p)->ifs_bits[(n)/NIFBITS] |= (1 << ((n) % NIFBITS)))
  57#define IF_CLR(n, p)    ((p)->ifs_bits[(n)/NIFBITS] &= ~(1 << ((n) % NIFBITS)))
  58#define IF_ISSET(n, p)  ((p)->ifs_bits[(n)/NIFBITS] & (1 << ((n) % NIFBITS)))
  59#define IF_COPY(f, t)   bcopy(f, t, sizeof(*(f)))
  60#define IF_ZERO(p)      bzero(p, sizeof(*(p)))
  61
  62/*
  63 *      Passed by mrouted for an MRT_ADD_MIF - again we use the
  64 *      mrouted 3.6 structures for compatibility
  65 */
  66
  67struct mif6ctl {
  68        mifi_t  mif6c_mifi;             /* Index of MIF */
  69        unsigned char mif6c_flags;      /* MIFF_ flags */
  70        unsigned char vifc_threshold;   /* ttl limit */
  71        __u16    mif6c_pifi;            /* the index of the physical IF */
  72        unsigned int vifc_rate_limit;   /* Rate limiter values (NI) */
  73};
  74
  75#define MIFF_REGISTER   0x1     /* register vif */
  76
  77/*
  78 *      Cache manipulation structures for mrouted and PIMd
  79 */
  80
  81struct mf6cctl {
  82        struct sockaddr_in6 mf6cc_origin;               /* Origin of mcast      */
  83        struct sockaddr_in6 mf6cc_mcastgrp;             /* Group in question    */
  84        mifi_t  mf6cc_parent;                   /* Where it arrived     */
  85        struct if_set mf6cc_ifset;              /* Where it is going */
  86};
  87
  88/*
  89 *      Group count retrieval for pim6sd
  90 */
  91
  92struct sioc_sg_req6 {
  93        struct sockaddr_in6 src;
  94        struct sockaddr_in6 grp;
  95        unsigned long pktcnt;
  96        unsigned long bytecnt;
  97        unsigned long wrong_if;
  98};
  99
 100/*
 101 *      To get vif packet counts
 102 */
 103
 104struct sioc_mif_req6 {
 105        mifi_t  mifi;           /* Which iface */
 106        unsigned long icount;   /* In packets */
 107        unsigned long ocount;   /* Out packets */
 108        unsigned long ibytes;   /* In bytes */
 109        unsigned long obytes;   /* Out bytes */
 110};
 111
 112/*
 113 *      That's all usermode folks
 114 */
 115
 116#ifdef __KERNEL__
 117
 118#include <linux/pim.h>
 119#include <linux/skbuff.h>       /* for struct sk_buff_head */
 120#include <net/net_namespace.h>
 121
 122#ifdef CONFIG_IPV6_MROUTE
 123static inline int ip6_mroute_opt(int opt)
 124{
 125        return (opt >= MRT6_BASE) && (opt <= MRT6_BASE + 10);
 126}
 127#else
 128static inline int ip6_mroute_opt(int opt)
 129{
 130        return 0;
 131}
 132#endif
 133
 134struct sock;
 135
 136#ifdef CONFIG_IPV6_MROUTE
 137extern int ip6_mroute_setsockopt(struct sock *, int, char __user *, unsigned int);
 138extern int ip6_mroute_getsockopt(struct sock *, int, char __user *, int __user *);
 139extern int ip6_mr_input(struct sk_buff *skb);
 140extern int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg);
 141extern int ip6mr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg);
 142extern int ip6_mr_init(void);
 143extern void ip6_mr_cleanup(void);
 144#else
 145static inline
 146int ip6_mroute_setsockopt(struct sock *sock,
 147                          int optname, char __user *optval, unsigned int optlen)
 148{
 149        return -ENOPROTOOPT;
 150}
 151
 152static inline
 153int ip6_mroute_getsockopt(struct sock *sock,
 154                          int optname, char __user *optval, int __user *optlen)
 155{
 156        return -ENOPROTOOPT;
 157}
 158
 159static inline
 160int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg)
 161{
 162        return -ENOIOCTLCMD;
 163}
 164
 165static inline int ip6_mr_init(void)
 166{
 167        return 0;
 168}
 169
 170static inline void ip6_mr_cleanup(void)
 171{
 172        return;
 173}
 174#endif
 175
 176struct mif_device {
 177        struct net_device       *dev;                   /* Device we are using */
 178        unsigned long   bytes_in,bytes_out;
 179        unsigned long   pkt_in,pkt_out;         /* Statistics                   */
 180        unsigned long   rate_limit;             /* Traffic shaping (NI)         */
 181        unsigned char   threshold;              /* TTL threshold                */
 182        unsigned short  flags;                  /* Control flags                */
 183        int             link;                   /* Physical interface index     */
 184};
 185
 186#define VIFF_STATIC 0x8000
 187
 188struct mfc6_cache {
 189        struct list_head list;
 190        struct in6_addr mf6c_mcastgrp;                  /* Group the entry belongs to   */
 191        struct in6_addr mf6c_origin;                    /* Source of packet             */
 192        mifi_t mf6c_parent;                     /* Source interface             */
 193        int mfc_flags;                          /* Flags on line                */
 194
 195        union {
 196                struct {
 197                        unsigned long expires;
 198                        struct sk_buff_head unresolved; /* Unresolved buffers           */
 199                } unres;
 200                struct {
 201                        unsigned long last_assert;
 202                        int minvif;
 203                        int maxvif;
 204                        unsigned long bytes;
 205                        unsigned long pkt;
 206                        unsigned long wrong_if;
 207                        unsigned char ttls[MAXMIFS];    /* TTL thresholds               */
 208                } res;
 209        } mfc_un;
 210};
 211
 212#define MFC_STATIC              1
 213#define MFC_NOTIFY              2
 214
 215#define MFC6_LINES              64
 216
 217#define MFC6_HASH(a, g) (((__force u32)(a)->s6_addr32[0] ^ \
 218                          (__force u32)(a)->s6_addr32[1] ^ \
 219                          (__force u32)(a)->s6_addr32[2] ^ \
 220                          (__force u32)(a)->s6_addr32[3] ^ \
 221                          (__force u32)(g)->s6_addr32[0] ^ \
 222                          (__force u32)(g)->s6_addr32[1] ^ \
 223                          (__force u32)(g)->s6_addr32[2] ^ \
 224                          (__force u32)(g)->s6_addr32[3]) % MFC6_LINES)
 225
 226#define MFC_ASSERT_THRESH (3*HZ)                /* Maximal freq. of asserts */
 227
 228#endif
 229
 230#ifdef __KERNEL__
 231struct rtmsg;
 232extern int ip6mr_get_route(struct net *net, struct sk_buff *skb,
 233                           struct rtmsg *rtm, int nowait);
 234
 235#ifdef CONFIG_IPV6_MROUTE
 236extern struct sock *mroute6_socket(struct net *net, struct sk_buff *skb);
 237extern int ip6mr_sk_done(struct sock *sk);
 238#else
 239static inline struct sock *mroute6_socket(struct net *net, struct sk_buff *skb)
 240{
 241        return NULL;
 242}
 243static inline int ip6mr_sk_done(struct sock *sk)
 244{
 245        return 0;
 246}
 247#endif
 248#endif
 249
 250/*
 251 * Structure used to communicate from kernel to multicast router.
 252 * We'll overlay the structure onto an MLD header (not an IPv6 heder like igmpmsg{}
 253 * used for IPv4 implementation). This is because this structure will be passed via an
 254 * IPv6 raw socket, on which an application will only receiver the payload i.e the data after
 255 * the IPv6 header and all the extension headers. (See section 3 of RFC 3542)
 256 */
 257
 258struct mrt6msg {
 259#define MRT6MSG_NOCACHE         1
 260#define MRT6MSG_WRONGMIF        2
 261#define MRT6MSG_WHOLEPKT        3               /* used for use level encap */
 262        __u8            im6_mbz;                /* must be zero            */
 263        __u8            im6_msgtype;            /* what type of message    */
 264        __u16           im6_mif;                /* mif rec'd on            */
 265        __u32           im6_pad;                /* padding for 64 bit arch */
 266        struct in6_addr im6_src, im6_dst;
 267};
 268
 269#endif
 270
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