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         __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
  78 struct mf6cctl {
  79         struct sockaddr_in6 mf6cc_origin;               /* Origin of mcast      */
  80         struct sockaddr_in6 mf6cc_mcastgrp;             /* Group in question    */
  81         mifi_t  mf6cc_parent;                   /* Where it arrived     */
  82         struct if_set mf6cc_ifset;              /* Where it is going */
  83 };
  84
  85 /*
  86  *      Group count retrieval for pim6sd
  87  */
  88
  89 struct sioc_sg_req6 {
  90         struct sockaddr_in6 src;
  91         struct sockaddr_in6 grp;
  92         unsigned long pktcnt;
  93         unsigned long bytecnt;
  94         unsigned long wrong_if;
  95 };
  96
  97 /*
  98  *      To get vif packet counts
  99  */
 100
 101 struct sioc_mif_req6 {
 102         mifi_t  mifi;           /* Which iface */
 103         unsigned long icount;   /* In packets */
 104         unsigned long ocount;   /* Out packets */
 105         unsigned long ibytes;   /* In bytes */
 106         unsigned long obytes;   /* Out bytes */
 107 };
 108
 109 /*
 110  *      That's all usermode folks
 111  */
 112
 113 #ifdef __KERNEL__
 114
 115 #include <linux/pim.h>
 116 #include <linux/skbuff.h>       /* for struct sk_buff_head */
 117 #include <net/net_namespace.h>
 118
 119 #ifdef CONFIG_IPV6_MROUTE
 120 static inline int ip6_mroute_opt(int opt)
 121 {
 122         return (opt >= MRT6_BASE) && (opt <= MRT6_BASE + 10);
 123 }
 124 #else
 125 static inline int ip6_mroute_opt(int opt)
 126 {
 127         return 0;
 128 }
 129 #endif
 130
 131 struct sock;
 132
 133 #ifdef CONFIG_IPV6_MROUTE
 134 extern int ip6_mroute_setsockopt(struct sock *, int, char __user *, unsigned int);
 135 extern int ip6_mroute_getsockopt(struct sock *, int, char __user *, int __user *);
 136 extern int ip6_mr_input(struct sk_buff *skb);
 137 extern int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg);
 138 extern int ip6_mr_init(void);
 139 extern void ip6_mr_cleanup(void);
 140 #else
 141 static inline
 142 int ip6_mroute_setsockopt(struct sock *sock,
 143                           int optname, char __user *optval, unsigned int optlen)
 144 {
 145         return -ENOPROTOOPT;
 146 }
 147
 148 static inline
 149 int ip6_mroute_getsockopt(struct sock *sock,
 150                           int optname, char __user *optval, int __user *optlen)
 151 {
 152         return -ENOPROTOOPT;
 153 }
 154
 155 static inline
 156 int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg)
 157 {
 158         return -ENOIOCTLCMD;
 159 }
 160
 161 static inline int ip6_mr_init(void)
 162 {
 163         return 0;
 164 }
 165
 166 static inline void ip6_mr_cleanup(void)
 167 {
 168         return;
 169 }
 170 #endif
 171
 172 struct mif_device {
 173         struct net_device       *dev;                   /* Device we are using */
 174         unsigned long   bytes_in,bytes_out;
 175         unsigned long   pkt_in,pkt_out;         /* Statistics                   */
 176         unsigned long   rate_limit;             /* Traffic shaping (NI)         */
 177         unsigned char   threshold;              /* TTL threshold                */
 178         unsigned short  flags;                  /* Control flags                */
 179         int             link;                   /* Physical interface index     */
 180 };
 181
 182 #define VIFF_STATIC 0x8000
 183
 184 struct mfc6_cache {
 185         struct mfc6_cache *next;                /* Next entry on cache line     */
 186 #ifdef CONFIG_NET_NS
 187         struct net *mfc6_net;
 188 #endif
 189         struct in6_addr mf6c_mcastgrp;                  /* Group the entry belongs to   */
 190         struct in6_addr mf6c_origin;                    /* Source of packet             */
 191         mifi_t mf6c_parent;                     /* Source interface             */
 192         int mfc_flags;                          /* Flags on line                */
 193
 194         union {
 195                 struct {
 196                         unsigned long expires;
 197                         struct sk_buff_head unresolved; /* Unresolved buffers           */
 198                 } unres;
 199                 struct {
 200                         unsigned long last_assert;
 201                         int minvif;
 202                         int maxvif;
 203                         unsigned long bytes;
 204                         unsigned long pkt;
 205                         unsigned long wrong_if;
 206                         unsigned char ttls[MAXMIFS];    /* TTL thresholds               */
 207                 } res;
 208         } mfc_un;
 209 };
 210
 211 static inline
 212 struct net *mfc6_net(const struct mfc6_cache *mfc)
 213 {
 214         return read_pnet(&mfc->mfc6_net);
 215 }
 216
 217 static inline
 218 void mfc6_net_set(struct mfc6_cache *mfc, struct net *net)
 219 {
 220         write_pnet(&mfc->mfc6_net, hold_net(net));
 221 }
 222
 223 #define MFC_STATIC              1
 224 #define MFC_NOTIFY              2
 225
 226 #define MFC6_LINES              64
 227
 228 #define MFC6_HASH(a, g) (((__force u32)(a)->s6_addr32[0] ^ \
 229                           (__force u32)(a)->s6_addr32[1] ^ \
 230                           (__force u32)(a)->s6_addr32[2] ^ \
 231                           (__force u32)(a)->s6_addr32[3] ^ \
 232                           (__force u32)(g)->s6_addr32[0] ^ \
 233                           (__force u32)(g)->s6_addr32[1] ^ \
 234                           (__force u32)(g)->s6_addr32[2] ^ \
 235                           (__force u32)(g)->s6_addr32[3]) % MFC6_LINES)
 236
 237 #define MFC_ASSERT_THRESH (3*HZ)                /* Maximal freq. of asserts */
 238
 239 #endif
 240
 241 #ifdef __KERNEL__
 242 struct rtmsg;
 243 extern int ip6mr_get_route(struct net *net, struct sk_buff *skb,
 244                            struct rtmsg *rtm, int nowait);
 245
 246 #ifdef CONFIG_IPV6_MROUTE
 247 static inline struct sock *mroute6_socket(struct net *net)
 248 {
 249         return net->ipv6.mroute6_sk;
 250 }
 251 extern int ip6mr_sk_done(struct sock *sk);
 252 #else
 253 static inline struct sock *mroute6_socket(struct net *net) { return NULL; }
 254 static inline int ip6mr_sk_done(struct sock *sk) { return 0; }
 255 #endif
 256 #endif
 257
 258 /*
 259  * Structure used to communicate from kernel to multicast router.
 260  * We'll overlay the structure onto an MLD header (not an IPv6 heder like igmpmsg{}
 261  * used for IPv4 implementation). This is because this structure will be passed via an
 262  * IPv6 raw socket, on wich an application will only receiver the payload i.e the data after
 263  * the IPv6 header and all the extension headers. (See section 3 of RFC 3542)
 264  */
 265
 266 struct mrt6msg {
 267 #define MRT6MSG_NOCACHE         1
 268 #define MRT6MSG_WRONGMIF        2
 269 #define MRT6MSG_WHOLEPKT        3               /* used for use level encap */
 270         __u8            im6_mbz;                /* must be zero            */
 271         __u8            im6_msgtype;            /* what type of message    */
 272         __u16           im6_mif;                /* mif rec'd on            */
 273         __u32           im6_pad;                /* padding for 64 bit arch */
 274         struct in6_addr im6_src, im6_dst;
 275 };
 276
 277 #endif