LXR linux/include/linux/mroute6.h

   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
  29#define SIOCGETMIFCNT_IN6       SIOCPROTOPRIVATE        /* IP protocol privates */
  30#define SIOCGETSGCNT_IN6        (SIOCPROTOPRIVATE+1)
  31#define SIOCGETRPF      (SIOCPROTOPRIVATE+2)
  32
  33#define MAXMIFS         32
  34typedef unsigned long mifbitmap_t;      /* User mode code depends on this lot */
  35typedef unsigned short mifi_t;
  36#define ALL_MIFS        ((mifi_t)(-1))
  37
  38#ifndef IF_SETSIZE
  39#define IF_SETSIZE      256
  40#endif
  41
  42typedef __u32           if_mask;
  43#define NIFBITS (sizeof(if_mask) * 8)        /* bits per mask */
  44
  45#if !defined(__KERNEL__) && !defined(DIV_ROUND_UP)
  46#define DIV_ROUND_UP(x,y)       (((x) + ((y) - 1)) / (y))
  47#endif
  48
  49typedef struct if_set {
  50        if_mask ifs_bits[DIV_ROUND_UP(IF_SETSIZE, NIFBITS)];
  51} if_set;
  52
  53#define IF_SET(n, p)    ((p)->ifs_bits[(n)/NIFBITS] |= (1 << ((n) % NIFBITS)))
  54#define IF_CLR(n, p)    ((p)->ifs_bits[(n)/NIFBITS] &= ~(1 << ((n) % NIFBITS)))
  55#define IF_ISSET(n, p)  ((p)->ifs_bits[(n)/NIFBITS] & (1 << ((n) % NIFBITS)))
  56#define IF_COPY(f, t)   bcopy(f, t, sizeof(*(f)))
  57#define IF_ZERO(p)      bzero(p, sizeof(*(p)))
  58
  59/*
  60 *      Passed by mrouted for an MRT_ADD_MIF - again we use the
  61 *      mrouted 3.6 structures for compatibility
  62 */
  63
  64struct mif6ctl {
  65        mifi_t  mif6c_mifi;             /* Index of MIF */
  66        unsigned char mif6c_flags;      /* MIFF_ flags */
  67        unsigned char vifc_threshold;   /* ttl limit */
  68        __u16    mif6c_pifi;            /* the index of the physical IF */
  69        unsigned int vifc_rate_limit;   /* Rate limiter values (NI) */
  70};
  71
  72#define MIFF_REGISTER   0x1     /* register vif */
  73
  74/*
  75 *      Cache manipulation structures for mrouted and PIMd
  76 */
  77
  78struct mf6cctl
  79{
  80        struct sockaddr_in6 mf6cc_origin;               /* Origin of mcast      */
  81        struct sockaddr_in6 mf6cc_mcastgrp;             /* Group in question    */
  82        mifi_t  mf6cc_parent;                   /* Where it arrived     */
  83        struct if_set mf6cc_ifset;              /* Where it is going */
  84};
  85
  86/*
  87 *      Group count retrieval for pim6sd
  88 */
  89
  90struct sioc_sg_req6
  91{
  92        struct sockaddr_in6 src;
  93        struct sockaddr_in6 grp;
  94        unsigned long pktcnt;
  95        unsigned long bytecnt;
  96        unsigned long wrong_if;
  97};
  98
  99/*
 100 *      To get vif packet counts
 101 */
 102
 103struct sioc_mif_req6
 104{
 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 ip6_mr_init(void);
 142extern void ip6_mr_cleanup(void);
 143#else
 144static inline
 145int ip6_mroute_setsockopt(struct sock *sock,
 146                          int optname, char __user *optval, unsigned int optlen)
 147{
 148        return -ENOPROTOOPT;
 149}
 150
 151static inline
 152int ip6_mroute_getsockopt(struct sock *sock,
 153                          int optname, char __user *optval, int __user *optlen)
 154{
 155        return -ENOPROTOOPT;
 156}
 157
 158static inline
 159int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg)
 160{
 161        return -ENOIOCTLCMD;
 162}
 163
 164static inline int ip6_mr_init(void)
 165{
 166        return 0;
 167}
 168
 169static inline void ip6_mr_cleanup(void)
 170{
 171        return;
 172}
 173#endif
 174
 175struct mif_device
 176{
 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{
 190        struct mfc6_cache *next;                /* Next entry on cache line     */
 191#ifdef CONFIG_NET_NS
 192        struct net *mfc6_net;
 193#endif
 194        struct in6_addr mf6c_mcastgrp;                  /* Group the entry belongs to   */
 195        struct in6_addr mf6c_origin;                    /* Source of packet             */
 196        mifi_t mf6c_parent;                     /* Source interface             */
 197        int mfc_flags;                          /* Flags on line                */
 198
 199        union {
 200                struct {
 201                        unsigned long expires;
 202                        struct sk_buff_head unresolved; /* Unresolved buffers           */
 203                } unres;
 204                struct {
 205                        unsigned long last_assert;
 206                        int minvif;
 207                        int maxvif;
 208                        unsigned long bytes;
 209                        unsigned long pkt;
 210                        unsigned long wrong_if;
 211                        unsigned char ttls[MAXMIFS];    /* TTL thresholds               */
 212                } res;
 213        } mfc_un;
 214};
 215
 216static inline
 217struct net *mfc6_net(const struct mfc6_cache *mfc)
 218{
 219        return read_pnet(&mfc->mfc6_net);
 220}
 221
 222static inline
 223void mfc6_net_set(struct mfc6_cache *mfc, struct net *net)
 224{
 225        write_pnet(&mfc->mfc6_net, hold_net(net));
 226}
 227
 228#define MFC_STATIC              1
 229#define MFC_NOTIFY              2
 230
 231#define MFC6_LINES              64
 232
 233#define MFC6_HASH(a, g) (((__force u32)(a)->s6_addr32[0] ^ \
 234                          (__force u32)(a)->s6_addr32[1] ^ \
 235                          (__force u32)(a)->s6_addr32[2] ^ \
 236                          (__force u32)(a)->s6_addr32[3] ^ \
 237                          (__force u32)(g)->s6_addr32[0] ^ \
 238                          (__force u32)(g)->s6_addr32[1] ^ \
 239                          (__force u32)(g)->s6_addr32[2] ^ \
 240                          (__force u32)(g)->s6_addr32[3]) % MFC6_LINES)
 241
 242#define MFC_ASSERT_THRESH (3*HZ)                /* Maximal freq. of asserts */
 243
 244#endif
 245
 246#ifdef __KERNEL__
 247struct rtmsg;
 248extern int ip6mr_get_route(struct net *net, struct sk_buff *skb,
 249                           struct rtmsg *rtm, int nowait);
 250
 251#ifdef CONFIG_IPV6_MROUTE
 252static inline struct sock *mroute6_socket(struct net *net)
 253{
 254        return net->ipv6.mroute6_sk;
 255}
 256extern int ip6mr_sk_done(struct sock *sk);
 257#else
 258static inline struct sock *mroute6_socket(struct net *net) { return NULL; }
 259static inline int ip6mr_sk_done(struct sock *sk) { return 0; }
 260#endif
 261#endif
 262
 263/*
 264 * Structure used to communicate from kernel to multicast router.
 265 * We'll overlay the structure onto an MLD header (not an IPv6 heder like igmpmsg{}
 266 * used for IPv4 implementation). This is because this structure will be passed via an
 267 * IPv6 raw socket, on wich an application will only receiver the payload i.e the data after
 268 * the IPv6 header and all the extension headers. (See section 3 of RFC 3542)
 269 */
 270
 271struct mrt6msg {
 272#define MRT6MSG_NOCACHE         1
 273#define MRT6MSG_WRONGMIF        2
 274#define MRT6MSG_WHOLEPKT        3               /* used for use level encap */
 275        __u8            im6_mbz;                /* must be zero            */
 276        __u8            im6_msgtype;            /* what type of message    */
 277        __u16           im6_mif;                /* mif rec'd on            */
 278        __u32           im6_pad;                /* padding for 64 bit arch */
 279        struct in6_addr im6_src, im6_dst;
 280};
 281
 282#endif
 283