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
  34 typedef unsigned long mifbitmap_t;      /* User mode code depends on this lot */
  35 typedef unsigned short mifi_t;
  36 #define ALL_MIFS        ((mifi_t)(-1))
  37
  38 #ifndef IF_SETSIZE
  39 #define IF_SETSIZE      256
  40 #endif
  41
  42 typedef __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
  49 typedef 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
  64 struct mif6ctl {
  65         mifi_t  mif6c_mifi;             /* Index of MIF */
  66         unsigned char mif6c_flags;      /* MIFF_ flags */
  67         unsigned char vifc_threshold;   /* ttl limit */
  68         u_short  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
  78 struct 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
  90 struct 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
 103 struct 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/skbuff.h>       /* for struct sk_buff_head */
 119
 120 struct net_device;
 121 struct inet6_dev *ipv6_find_idev(struct net_device *dev);
 122
 123 #ifdef CONFIG_IPV6_MROUTE
 124 static inline int ip6_mroute_opt(int opt)
 125 {
 126         return (opt >= MRT6_BASE) && (opt <= MRT6_BASE + 10);
 127 }
 128 #else
 129 static inline int ip6_mroute_opt(int opt)
 130 {
 131         return 0;
 132 }
 133 #endif
 134
 135 struct sock;
 136
 137 extern int ip6_mroute_setsockopt(struct sock *, int, char __user *, int);
 138 extern int ip6_mroute_getsockopt(struct sock *, int, char __user *, int __user *);
 139 extern int ip6_mr_input(struct sk_buff *skb);
 140 extern int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg);
 141 extern void ip6_mr_init(void);
 142
 143 struct mif_device
 144 {
 145         struct net_device       *dev;                   /* Device we are using */
 146         unsigned long   bytes_in,bytes_out;
 147         unsigned long   pkt_in,pkt_out;         /* Statistics                   */
 148         unsigned long   rate_limit;             /* Traffic shaping (NI)         */
 149         unsigned char   threshold;              /* TTL threshold                */
 150         unsigned short  flags;                  /* Control flags                */
 151         int             link;                   /* Physical interface index     */
 152 };
 153
 154 #define VIFF_STATIC 0x8000
 155
 156 struct mfc6_cache
 157 {
 158         struct mfc6_cache *next;                /* Next entry on cache line     */
 159         struct in6_addr mf6c_mcastgrp;                  /* Group the entry belongs to   */
 160         struct in6_addr mf6c_origin;                    /* Source of packet             */
 161         mifi_t mf6c_parent;                     /* Source interface             */
 162         int mfc_flags;                          /* Flags on line                */
 163
 164         union {
 165                 struct {
 166                         unsigned long expires;
 167                         struct sk_buff_head unresolved; /* Unresolved buffers           */
 168                 } unres;
 169                 struct {
 170                         unsigned long last_assert;
 171                         int minvif;
 172                         int maxvif;
 173                         unsigned long bytes;
 174                         unsigned long pkt;
 175                         unsigned long wrong_if;
 176                         unsigned char ttls[MAXMIFS];    /* TTL thresholds               */
 177                 } res;
 178         } mfc_un;
 179 };
 180
 181 #define MFC_STATIC              1
 182 #define MFC_NOTIFY              2
 183
 184 #define MFC6_LINES              64
 185
 186 #define MFC6_HASH(a, g) (((__force u32)(a)->s6_addr32[0] ^ \
 187                           (__force u32)(a)->s6_addr32[1] ^ \
 188                           (__force u32)(a)->s6_addr32[2] ^ \
 189                           (__force u32)(a)->s6_addr32[3] ^ \
 190                           (__force u32)(g)->s6_addr32[0] ^ \
 191                           (__force u32)(g)->s6_addr32[1] ^ \
 192                           (__force u32)(g)->s6_addr32[2] ^ \
 193                           (__force u32)(g)->s6_addr32[3]) % MFC6_LINES)
 194
 195 #define MFC_ASSERT_THRESH (3*HZ)                /* Maximal freq. of asserts */
 196
 197 #endif
 198
 199 #ifdef __KERNEL__
 200 struct rtmsg;
 201 extern int ip6mr_get_route(struct sk_buff *skb, struct rtmsg *rtm, int nowait);
 202
 203 #ifdef CONFIG_IPV6_MROUTE
 204 extern struct sock *mroute6_socket;
 205 extern int ip6mr_sk_done(struct sock *sk);
 206 #else
 207 #define mroute6_socket NULL
 208 static inline int ip6mr_sk_done(struct sock *sk) { return 0; }
 209 #endif
 210 #endif
 211
 212 /*
 213  * Structure used to communicate from kernel to multicast router.
 214  * We'll overlay the structure onto an MLD header (not an IPv6 heder like igmpmsg{}
 215  * used for IPv4 implementation). This is because this structure will be passed via an
 216  * IPv6 raw socket, on wich an application will only receiver the payload i.e the data after
 217  * the IPv6 header and all the extension headers. (See section 3 of RFC 3542)
 218  */
 219
 220 struct mrt6msg {
 221 #define MRT6MSG_NOCACHE         1
 222 #define MRT6MSG_WRONGMIF        2
 223 #define MRT6MSG_WHOLEPKT        3               /* used for use level encap */
 224         __u8            im6_mbz;                /* must be zero            */
 225         __u8            im6_msgtype;            /* what type of message    */
 226         __u16           im6_mif;                /* mif rec'd on            */
 227         __u32           im6_pad;                /* padding for 64 bit arch */
 228         struct in6_addr im6_src, im6_dst;
 229 };
 230
 231 #endif