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#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__) && !defined(DIV_ROUND_UP)
  47#define DIV_ROUND_UP(x,y)       (((x) + ((y) - 1)) / (y))
  48#endif
  49
  50typedef struct if_set {
  51        if_mask ifs_bits[DIV_ROUND_UP(IF_SETSIZE, NIFBITS)];
  52} if_set;
  53
  54#define IF_SET(n, p)    ((p)->ifs_bits[(n)/NIFBITS] |= (1 << ((n) % NIFBITS)))
  55#define IF_CLR(n, p)    ((p)->ifs_bits[(n)/NIFBITS] &= ~(1 << ((n) % NIFBITS)))
  56#define IF_ISSET(n, p)  ((p)->ifs_bits[(n)/NIFBITS] & (1 << ((n) % NIFBITS)))
  57#define IF_COPY(f, t)   bcopy(f, t, sizeof(*(f)))
  58#define IF_ZERO(p)      bzero(p, sizeof(*(p)))
  59
  60/*
  61 *      Passed by mrouted for an MRT_ADD_MIF - again we use the
  62 *      mrouted 3.6 structures for compatibility
  63 */
  64
  65struct mif6ctl {
  66        mifi_t  mif6c_mifi;             /* Index of MIF */
  67        unsigned char mif6c_flags;      /* MIFF_ flags */
  68        unsigned char vifc_threshold;   /* ttl limit */
  69        __u16    mif6c_pifi;            /* the index of the physical IF */
  70        unsigned int vifc_rate_limit;   /* Rate limiter values (NI) */
  71};
  72
  73#define MIFF_REGISTER   0x1     /* register vif */
  74
  75/*
  76 *      Cache manipulation structures for mrouted and PIMd
  77 */
  78
  79struct mf6cctl {
  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        struct sockaddr_in6 src;
  92        struct sockaddr_in6 grp;
  93        unsigned long pktcnt;
  94        unsigned long bytecnt;
  95        unsigned long wrong_if;
  96};
  97
  98/*
  99 *      To get vif packet counts
 100 */
 101
 102struct sioc_mif_req6 {
 103        mifi_t  mifi;           /* Which iface */
 104        unsigned long icount;   /* In packets */
 105        unsigned long ocount;   /* Out packets */
 106        unsigned long ibytes;   /* In bytes */
 107        unsigned long obytes;   /* Out bytes */
 108};
 109
 110/*
 111 *      That's all usermode folks
 112 */
 113
 114#ifdef __KERNEL__
 115
 116#include <linux/pim.h>
 117#include <linux/skbuff.h>       /* for struct sk_buff_head */
 118#include <net/net_namespace.h>
 119
 120#ifdef CONFIG_IPV6_MROUTE
 121static inline int ip6_mroute_opt(int opt)
 122{
 123        return (opt >= MRT6_BASE) && (opt <= MRT6_BASE + 10);
 124}
 125#else
 126static inline int ip6_mroute_opt(int opt)
 127{
 128        return 0;
 129}
 130#endif
 131
 132struct sock;
 133
 134#ifdef CONFIG_IPV6_MROUTE
 135extern int ip6_mroute_setsockopt(struct sock *, int, char __user *, unsigned int);
 136extern int ip6_mroute_getsockopt(struct sock *, int, char __user *, int __user *);
 137extern int ip6_mr_input(struct sk_buff *skb);
 138extern int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg);
 139extern int ip6mr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg);
 140extern int ip6_mr_init(void);
 141extern void ip6_mr_cleanup(void);
 142#else
 143static inline
 144int ip6_mroute_setsockopt(struct sock *sock,
 145                          int optname, char __user *optval, unsigned int optlen)
 146{
 147        return -ENOPROTOOPT;
 148}
 149
 150static inline
 151int ip6_mroute_getsockopt(struct sock *sock,
 152                          int optname, char __user *optval, int __user *optlen)
 153{
 154        return -ENOPROTOOPT;
 155}
 156
 157static inline
 158int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg)
 159{
 160        return -ENOIOCTLCMD;
 161}
 162
 163static inline int ip6_mr_init(void)
 164{
 165        return 0;
 166}
 167
 168static inline void ip6_mr_cleanup(void)
 169{
 170        return;
 171}
 172#endif
 173
 174struct mif_device {
 175        struct net_device       *dev;                   /* Device we are using */
 176        unsigned long   bytes_in,bytes_out;
 177        unsigned long   pkt_in,pkt_out;         /* Statistics                   */
 178        unsigned long   rate_limit;             /* Traffic shaping (NI)         */
 179        unsigned char   threshold;              /* TTL threshold                */
 180        unsigned short  flags;                  /* Control flags                */
 181        int             link;                   /* Physical interface index     */
 182};
 183
 184#define VIFF_STATIC 0x8000
 185
 186struct mfc6_cache {
 187        struct list_head list;
 188        struct in6_addr mf6c_mcastgrp;                  /* Group the entry belongs to   */
 189        struct in6_addr mf6c_origin;                    /* Source of packet             */
 190        mifi_t mf6c_parent;                     /* Source interface             */
 191        int mfc_flags;                          /* Flags on line                */
 192
 193        union {
 194                struct {
 195                        unsigned long expires;
 196                        struct sk_buff_head unresolved; /* Unresolved buffers           */
 197                } unres;
 198                struct {
 199                        unsigned long last_assert;
 200                        int minvif;
 201                        int maxvif;
 202                        unsigned long bytes;
 203                        unsigned long pkt;
 204                        unsigned long wrong_if;
 205                        unsigned char ttls[MAXMIFS];    /* TTL thresholds               */
 206                } res;
 207        } mfc_un;
 208};
 209
 210#define MFC_STATIC              1
 211#define MFC_NOTIFY              2
 212
 213#define MFC6_LINES              64
 214
 215#define MFC6_HASH(a, g) (((__force u32)(a)->s6_addr32[0] ^ \
 216                          (__force u32)(a)->s6_addr32[1] ^ \
 217                          (__force u32)(a)->s6_addr32[2] ^ \
 218                          (__force u32)(a)->s6_addr32[3] ^ \
 219                          (__force u32)(g)->s6_addr32[0] ^ \
 220                          (__force u32)(g)->s6_addr32[1] ^ \
 221                          (__force u32)(g)->s6_addr32[2] ^ \
 222                          (__force u32)(g)->s6_addr32[3]) % MFC6_LINES)
 223
 224#define MFC_ASSERT_THRESH (3*HZ)                /* Maximal freq. of asserts */
 225
 226#endif
 227
 228#ifdef __KERNEL__
 229struct rtmsg;
 230extern int ip6mr_get_route(struct net *net, struct sk_buff *skb,
 231                           struct rtmsg *rtm, int nowait);
 232
 233#ifdef CONFIG_IPV6_MROUTE
 234extern struct sock *mroute6_socket(struct net *net, struct sk_buff *skb);
 235extern int ip6mr_sk_done(struct sock *sk);
 236#else
 237static inline struct sock *mroute6_socket(struct net *net, struct sk_buff *skb)
 238{
 239        return NULL;
 240}
 241static inline int ip6mr_sk_done(struct sock *sk)
 242{
 243        return 0;
 244}
 245#endif
 246#endif
 247
 248/*
 249 * Structure used to communicate from kernel to multicast router.
 250 * We'll overlay the structure onto an MLD header (not an IPv6 heder like igmpmsg{}
 251 * used for IPv4 implementation). This is because this structure will be passed via an
 252 * IPv6 raw socket, on wich an application will only receiver the payload i.e the data after
 253 * the IPv6 header and all the extension headers. (See section 3 of RFC 3542)
 254 */
 255
 256struct mrt6msg {
 257#define MRT6MSG_NOCACHE         1
 258#define MRT6MSG_WRONGMIF        2
 259#define MRT6MSG_WHOLEPKT        3               /* used for use level encap */
 260        __u8            im6_mbz;                /* must be zero            */
 261        __u8            im6_msgtype;            /* what type of message    */
 262        __u16           im6_mif;                /* mif rec'd on            */
 263        __u32           im6_pad;                /* padding for 64 bit arch */
 264        struct in6_addr im6_src, im6_dst;
 265};
 266
 267#endif
 268