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/pim.h>
 119 #include <linux/skbuff.h>       /* for struct sk_buff_head */
 120 #include <net/net_namespace.h>
 121
 122 #ifdef CONFIG_IPV6_MROUTE
 123 static inline int ip6_mroute_opt(int opt)
 124 {
 125         return (opt >= MRT6_BASE) && (opt <= MRT6_BASE + 10);
 126 }
 127 #else
 128 static inline int ip6_mroute_opt(int opt)
 129 {
 130         return 0;
 131 }
 132 #endif
 133
 134 struct sock;
 135
 136 #ifdef CONFIG_IPV6_MROUTE
 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 int ip6_mr_init(void);
 142 extern void ip6_mr_cleanup(void);
 143 #else
 144 static inline
 145 int ip6_mroute_setsockopt(struct sock *sock,
 146                           int optname, char __user *optval, int optlen)
 147 {
 148         return -ENOPROTOOPT;
 149 }
 150
 151 static inline
 152 int ip6_mroute_getsockopt(struct sock *sock,
 153                           int optname, char __user *optval, int __user *optlen)
 154 {
 155         return -ENOPROTOOPT;
 156 }
 157
 158 static inline
 159 int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg)
 160 {
 161         return -ENOIOCTLCMD;
 162 }
 163
 164 static inline int ip6_mr_init(void)
 165 {
 166         return 0;
 167 }
 168
 169 static inline void ip6_mr_cleanup(void)
 170 {
 171         return;
 172 }
 173 #endif
 174
 175 struct 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
 188 struct 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
 216 static inline
 217 struct net *mfc6_net(const struct mfc6_cache *mfc)
 218 {
 219         return read_pnet(&mfc->mfc6_net);
 220 }
 221
 222 static inline
 223 void 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__
 247 struct rtmsg;
 248 extern int ip6mr_get_route(struct net *net, struct sk_buff *skb,
 249                            struct rtmsg *rtm, int nowait);
 250
 251 #ifdef CONFIG_IPV6_MROUTE
 252 static inline struct sock *mroute6_socket(struct net *net)
 253 {
 254         return net->ipv6.mroute6_sk;
 255 }
 256 extern int ip6mr_sk_done(struct sock *sk);
 257 #else
 258 static inline struct sock *mroute6_socket(struct net *net) { return NULL; }
 259 static 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
 271 struct 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