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__) && !defined(DIV_ROUND_UP)
  47 #define DIV_ROUND_UP(x,y)       (((x) + ((y) - 1)) / (y))
  48 #endif
  49
  50 typedef 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
  65 struct 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
  79 struct 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
  90 struct 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
 102 struct 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
 121 static inline int ip6_mroute_opt(int opt)
 122 {
 123         return (opt >= MRT6_BASE) && (opt <= MRT6_BASE + 10);
 124 }
 125 #else
 126 static inline int ip6_mroute_opt(int opt)
 127 {
 128         return 0;
 129 }
 130 #endif
 131
 132 struct sock;
 133
 134 #ifdef CONFIG_IPV6_MROUTE
 135 extern int ip6_mroute_setsockopt(struct sock *, int, char __user *, unsigned int);
 136 extern int ip6_mroute_getsockopt(struct sock *, int, char __user *, int __user *);
 137 extern int ip6_mr_input(struct sk_buff *skb);
 138 extern int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg);
 139 extern int ip6_mr_init(void);
 140 extern void ip6_mr_cleanup(void);
 141 #else
 142 static inline
 143 int ip6_mroute_setsockopt(struct sock *sock,
 144                           int optname, char __user *optval, unsigned int optlen)
 145 {
 146         return -ENOPROTOOPT;
 147 }
 148
 149 static inline
 150 int ip6_mroute_getsockopt(struct sock *sock,
 151                           int optname, char __user *optval, int __user *optlen)
 152 {
 153         return -ENOPROTOOPT;
 154 }
 155
 156 static inline
 157 int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg)
 158 {
 159         return -ENOIOCTLCMD;
 160 }
 161
 162 static inline int ip6_mr_init(void)
 163 {
 164         return 0;
 165 }
 166
 167 static inline void ip6_mr_cleanup(void)
 168 {
 169         return;
 170 }
 171 #endif
 172
 173 struct mif_device {
 174         struct net_device       *dev;                   /* Device we are using */
 175         unsigned long   bytes_in,bytes_out;
 176         unsigned long   pkt_in,pkt_out;         /* Statistics                   */
 177         unsigned long   rate_limit;             /* Traffic shaping (NI)         */
 178         unsigned char   threshold;              /* TTL threshold                */
 179         unsigned short  flags;                  /* Control flags                */
 180         int             link;                   /* Physical interface index     */
 181 };
 182
 183 #define VIFF_STATIC 0x8000
 184
 185 struct mfc6_cache {
 186         struct list_head list;
 187         struct in6_addr mf6c_mcastgrp;                  /* Group the entry belongs to   */
 188         struct in6_addr mf6c_origin;                    /* Source of packet             */
 189         mifi_t mf6c_parent;                     /* Source interface             */
 190         int mfc_flags;                          /* Flags on line                */
 191
 192         union {
 193                 struct {
 194                         unsigned long expires;
 195                         struct sk_buff_head unresolved; /* Unresolved buffers           */
 196                 } unres;
 197                 struct {
 198                         unsigned long last_assert;
 199                         int minvif;
 200                         int maxvif;
 201                         unsigned long bytes;
 202                         unsigned long pkt;
 203                         unsigned long wrong_if;
 204                         unsigned char ttls[MAXMIFS];    /* TTL thresholds               */
 205                 } res;
 206         } mfc_un;
 207 };
 208
 209 #define MFC_STATIC              1
 210 #define MFC_NOTIFY              2
 211
 212 #define MFC6_LINES              64
 213
 214 #define MFC6_HASH(a, g) (((__force u32)(a)->s6_addr32[0] ^ \
 215                           (__force u32)(a)->s6_addr32[1] ^ \
 216                           (__force u32)(a)->s6_addr32[2] ^ \
 217                           (__force u32)(a)->s6_addr32[3] ^ \
 218                           (__force u32)(g)->s6_addr32[0] ^ \
 219                           (__force u32)(g)->s6_addr32[1] ^ \
 220                           (__force u32)(g)->s6_addr32[2] ^ \
 221                           (__force u32)(g)->s6_addr32[3]) % MFC6_LINES)
 222
 223 #define MFC_ASSERT_THRESH (3*HZ)                /* Maximal freq. of asserts */
 224
 225 #endif
 226
 227 #ifdef __KERNEL__
 228 struct rtmsg;
 229 extern int ip6mr_get_route(struct net *net, struct sk_buff *skb,
 230                            struct rtmsg *rtm, int nowait);
 231
 232 #ifdef CONFIG_IPV6_MROUTE
 233 extern struct sock *mroute6_socket(struct net *net, struct sk_buff *skb);
 234 extern int ip6mr_sk_done(struct sock *sk);
 235 #else
 236 static inline struct sock *mroute6_socket(struct net *net, struct sk_buff *skb)
 237 {
 238         return NULL;
 239 }
 240 static inline int ip6mr_sk_done(struct sock *sk)
 241 {
 242         return 0;
 243 }
 244 #endif
 245 #endif
 246
 247 /*
 248  * Structure used to communicate from kernel to multicast router.
 249  * We'll overlay the structure onto an MLD header (not an IPv6 heder like igmpmsg{}
 250  * used for IPv4 implementation). This is because this structure will be passed via an
 251  * IPv6 raw socket, on wich an application will only receiver the payload i.e the data after
 252  * the IPv6 header and all the extension headers. (See section 3 of RFC 3542)
 253  */
 254
 255 struct mrt6msg {
 256 #define MRT6MSG_NOCACHE         1
 257 #define MRT6MSG_WRONGMIF        2
 258 #define MRT6MSG_WHOLEPKT        3               /* used for use level encap */
 259         __u8            im6_mbz;                /* must be zero            */
 260         __u8            im6_msgtype;            /* what type of message    */
 261         __u16           im6_mif;                /* mif rec'd on            */
 262         __u32           im6_pad;                /* padding for 64 bit arch */
 263         struct in6_addr im6_src, im6_dst;
 264 };
 265
 266 #endif