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
  35 typedef unsigned long mifbitmap_t;      /* User mode code depends on this lot */
  36 typedef unsigned short mifi_t;
  37 #define ALL_MIFS        ((mifi_t)(-1))
  38
  39 #ifndef IF_SETSIZE
  40 #define IF_SETSIZE      256
  41 #endif
  42
  43 typedef __u32           if_mask;
  44 #define NIFBITS (sizeof(if_mask) * 8)        /* bits per mask */
  45
  46 #if !defined(__KERNEL__)
  47 #if !defined(DIV_ROUND_UP)
  48 #define DIV_ROUND_UP(x,y)       (((x) + ((y) - 1)) / (y))
  49 #endif
  50 #endif
  51
  52 typedef struct if_set {
  53         if_mask ifs_bits[DIV_ROUND_UP(IF_SETSIZE, NIFBITS)];
  54 } if_set;
  55
  56 #define IF_SET(n, p)    ((p)->ifs_bits[(n)/NIFBITS] |= (1 << ((n) % NIFBITS)))
  57 #define IF_CLR(n, p)    ((p)->ifs_bits[(n)/NIFBITS] &= ~(1 << ((n) % NIFBITS)))
  58 #define IF_ISSET(n, p)  ((p)->ifs_bits[(n)/NIFBITS] & (1 << ((n) % NIFBITS)))
  59 #define IF_COPY(f, t)   bcopy(f, t, sizeof(*(f)))
  60 #define IF_ZERO(p)      bzero(p, sizeof(*(p)))
  61
  62 /*
  63  *      Passed by mrouted for an MRT_ADD_MIF - again we use the
  64  *      mrouted 3.6 structures for compatibility
  65  */
  66
  67 struct mif6ctl {
  68         mifi_t  mif6c_mifi;             /* Index of MIF */
  69         unsigned char mif6c_flags;      /* MIFF_ flags */
  70         unsigned char vifc_threshold;   /* ttl limit */
  71         __u16    mif6c_pifi;            /* the index of the physical IF */
  72         unsigned int vifc_rate_limit;   /* Rate limiter values (NI) */
  73 };
  74
  75 #define MIFF_REGISTER   0x1     /* register vif */
  76
  77 /*
  78  *      Cache manipulation structures for mrouted and PIMd
  79  */
  80
  81 struct mf6cctl {
  82         struct sockaddr_in6 mf6cc_origin;               /* Origin of mcast      */
  83         struct sockaddr_in6 mf6cc_mcastgrp;             /* Group in question    */
  84         mifi_t  mf6cc_parent;                   /* Where it arrived     */
  85         struct if_set mf6cc_ifset;              /* Where it is going */
  86 };
  87
  88 /*
  89  *      Group count retrieval for pim6sd
  90  */
  91
  92 struct sioc_sg_req6 {
  93         struct sockaddr_in6 src;
  94         struct sockaddr_in6 grp;
  95         unsigned long pktcnt;
  96         unsigned long bytecnt;
  97         unsigned long wrong_if;
  98 };
  99
 100 /*
 101  *      To get vif packet counts
 102  */
 103
 104 struct sioc_mif_req6 {
 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 *, unsigned 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 ip6mr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg);
 142 extern int ip6_mr_init(void);
 143 extern void ip6_mr_cleanup(void);
 144 #else
 145 static inline
 146 int ip6_mroute_setsockopt(struct sock *sock,
 147                           int optname, char __user *optval, unsigned int optlen)
 148 {
 149         return -ENOPROTOOPT;
 150 }
 151
 152 static inline
 153 int ip6_mroute_getsockopt(struct sock *sock,
 154                           int optname, char __user *optval, int __user *optlen)
 155 {
 156         return -ENOPROTOOPT;
 157 }
 158
 159 static inline
 160 int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg)
 161 {
 162         return -ENOIOCTLCMD;
 163 }
 164
 165 static inline int ip6_mr_init(void)
 166 {
 167         return 0;
 168 }
 169
 170 static inline void ip6_mr_cleanup(void)
 171 {
 172         return;
 173 }
 174 #endif
 175
 176 struct mif_device {
 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         struct list_head list;
 190         struct in6_addr mf6c_mcastgrp;                  /* Group the entry belongs to   */
 191         struct in6_addr mf6c_origin;                    /* Source of packet             */
 192         mifi_t mf6c_parent;                     /* Source interface             */
 193         int mfc_flags;                          /* Flags on line                */
 194
 195         union {
 196                 struct {
 197                         unsigned long expires;
 198                         struct sk_buff_head unresolved; /* Unresolved buffers           */
 199                 } unres;
 200                 struct {
 201                         unsigned long last_assert;
 202                         int minvif;
 203                         int maxvif;
 204                         unsigned long bytes;
 205                         unsigned long pkt;
 206                         unsigned long wrong_if;
 207                         unsigned char ttls[MAXMIFS];    /* TTL thresholds               */
 208                 } res;
 209         } mfc_un;
 210 };
 211
 212 #define MFC_STATIC              1
 213 #define MFC_NOTIFY              2
 214
 215 #define MFC6_LINES              64
 216
 217 #define MFC6_HASH(a, g) (((__force u32)(a)->s6_addr32[0] ^ \
 218                           (__force u32)(a)->s6_addr32[1] ^ \
 219                           (__force u32)(a)->s6_addr32[2] ^ \
 220                           (__force u32)(a)->s6_addr32[3] ^ \
 221                           (__force u32)(g)->s6_addr32[0] ^ \
 222                           (__force u32)(g)->s6_addr32[1] ^ \
 223                           (__force u32)(g)->s6_addr32[2] ^ \
 224                           (__force u32)(g)->s6_addr32[3]) % MFC6_LINES)
 225
 226 #define MFC_ASSERT_THRESH (3*HZ)                /* Maximal freq. of asserts */
 227
 228 #endif
 229
 230 #ifdef __KERNEL__
 231 struct rtmsg;
 232 extern int ip6mr_get_route(struct net *net, struct sk_buff *skb,
 233                            struct rtmsg *rtm, int nowait);
 234
 235 #ifdef CONFIG_IPV6_MROUTE
 236 extern struct sock *mroute6_socket(struct net *net, struct sk_buff *skb);
 237 extern int ip6mr_sk_done(struct sock *sk);
 238 #else
 239 static inline struct sock *mroute6_socket(struct net *net, struct sk_buff *skb)
 240 {
 241         return NULL;
 242 }
 243 static inline int ip6mr_sk_done(struct sock *sk)
 244 {
 245         return 0;
 246 }
 247 #endif
 248 #endif
 249
 250 /*
 251  * Structure used to communicate from kernel to multicast router.
 252  * We'll overlay the structure onto an MLD header (not an IPv6 heder like igmpmsg{}
 253  * used for IPv4 implementation). This is because this structure will be passed via an
 254  * IPv6 raw socket, on which an application will only receiver the payload i.e the data after
 255  * the IPv6 header and all the extension headers. (See section 3 of RFC 3542)
 256  */
 257
 258 struct mrt6msg {
 259 #define MRT6MSG_NOCACHE         1
 260 #define MRT6MSG_WRONGMIF        2
 261 #define MRT6MSG_WHOLEPKT        3               /* used for use level encap */
 262         __u8            im6_mbz;                /* must be zero            */
 263         __u8            im6_msgtype;            /* what type of message    */
 264         __u16           im6_mif;                /* mif rec'd on            */
 265         __u32           im6_pad;                /* padding for 64 bit arch */
 266         struct in6_addr im6_src, im6_dst;
 267 };
 268
 269 #endif