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
  27 #define SIOCGETMIFCNT_IN6       SIOCPROTOPRIVATE        /* IP protocol privates */
  28 #define SIOCGETSGCNT_IN6        (SIOCPROTOPRIVATE+1)
  29 #define SIOCGETRPF      (SIOCPROTOPRIVATE+2)
  30
  31 #define MAXMIFS         32
  32 typedef unsigned long mifbitmap_t;      /* User mode code depends on this lot */
  33 typedef unsigned short mifi_t;
  34 #define ALL_MIFS        ((mifi_t)(-1))
  35
  36 #ifndef IF_SETSIZE
  37 #define IF_SETSIZE      256
  38 #endif
  39
  40 typedef __u32           if_mask;
  41 #define NIFBITS (sizeof(if_mask) * 8)        /* bits per mask */
  42
  43 #if !defined(__KERNEL__) && !defined(DIV_ROUND_UP)
  44 #define DIV_ROUND_UP(x,y)       (((x) + ((y) - 1)) / (y))
  45 #endif
  46
  47 typedef struct if_set {
  48         if_mask ifs_bits[DIV_ROUND_UP(IF_SETSIZE, NIFBITS)];
  49 } if_set;
  50
  51 #define IF_SET(n, p)    ((p)->ifs_bits[(n)/NIFBITS] |= (1 << ((n) % NIFBITS)))
  52 #define IF_CLR(n, p)    ((p)->ifs_bits[(n)/NIFBITS] &= ~(1 << ((n) % NIFBITS)))
  53 #define IF_ISSET(n, p)  ((p)->ifs_bits[(n)/NIFBITS] & (1 << ((n) % NIFBITS)))
  54 #define IF_COPY(f, t)   bcopy(f, t, sizeof(*(f)))
  55 #define IF_ZERO(p)      bzero(p, sizeof(*(p)))
  56
  57 /*
  58  *      Passed by mrouted for an MRT_ADD_MIF - again we use the
  59  *      mrouted 3.6 structures for compatibility
  60  */
  61
  62 struct mif6ctl {
  63         mifi_t  mif6c_mifi;             /* Index of MIF */
  64         unsigned char mif6c_flags;      /* MIFF_ flags */
  65         unsigned char vifc_threshold;   /* ttl limit */
  66         u_short  mif6c_pifi;            /* the index of the physical IF */
  67         unsigned int vifc_rate_limit;   /* Rate limiter values (NI) */
  68 };
  69
  70 #define MIFF_REGISTER   0x1     /* register vif */
  71
  72 /*
  73  *      Cache manipulation structures for mrouted and PIMd
  74  */
  75
  76 struct mf6cctl
  77 {
  78         struct sockaddr_in6 mf6cc_origin;               /* Origin of mcast      */
  79         struct sockaddr_in6 mf6cc_mcastgrp;             /* Group in question    */
  80         mifi_t  mf6cc_parent;                   /* Where it arrived     */
  81         struct if_set mf6cc_ifset;              /* Where it is going */
  82 };
  83
  84 /*
  85  *      Group count retrieval for pim6sd
  86  */
  87
  88 struct sioc_sg_req6
  89 {
  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 {
 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/skbuff.h>       /* for struct sk_buff_head */
 117
 118 struct net_device;
 119 struct inet6_dev *ipv6_find_idev(struct net_device *dev);
 120
 121 #ifdef CONFIG_IPV6_MROUTE
 122 static inline int ip6_mroute_opt(int opt)
 123 {
 124         return (opt >= MRT6_BASE) && (opt <= MRT6_BASE + 10);
 125 }
 126 #else
 127 static inline int ip6_mroute_opt(int opt)
 128 {
 129         return 0;
 130 }
 131 #endif
 132
 133 struct sock;
 134
 135 extern int ip6_mroute_setsockopt(struct sock *, int, char __user *, 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 void ip6_mr_init(void);
 140
 141 struct mif_device
 142 {
 143         struct net_device       *dev;                   /* Device we are using */
 144         unsigned long   bytes_in,bytes_out;
 145         unsigned long   pkt_in,pkt_out;         /* Statistics                   */
 146         unsigned long   rate_limit;             /* Traffic shaping (NI)         */
 147         unsigned char   threshold;              /* TTL threshold                */
 148         unsigned short  flags;                  /* Control flags                */
 149         int             link;                   /* Physical interface index     */
 150 };
 151
 152 #define VIFF_STATIC 0x8000
 153
 154 struct mfc6_cache
 155 {
 156         struct mfc6_cache *next;                /* Next entry on cache line     */
 157         struct in6_addr mf6c_mcastgrp;                  /* Group the entry belongs to   */
 158         struct in6_addr mf6c_origin;                    /* Source of packet             */
 159         mifi_t mf6c_parent;                     /* Source interface             */
 160         int mfc_flags;                          /* Flags on line                */
 161
 162         union {
 163                 struct {
 164                         unsigned long expires;
 165                         struct sk_buff_head unresolved; /* Unresolved buffers           */
 166                 } unres;
 167                 struct {
 168                         unsigned long last_assert;
 169                         int minvif;
 170                         int maxvif;
 171                         unsigned long bytes;
 172                         unsigned long pkt;
 173                         unsigned long wrong_if;
 174                         unsigned char ttls[MAXMIFS];    /* TTL thresholds               */
 175                 } res;
 176         } mfc_un;
 177 };
 178
 179 #define MFC_STATIC              1
 180 #define MFC_NOTIFY              2
 181
 182 #define MFC6_LINES              64
 183
 184 #define MFC6_HASH(a, g) (((__force u32)(a)->s6_addr32[0] ^ \
 185                           (__force u32)(a)->s6_addr32[1] ^ \
 186                           (__force u32)(a)->s6_addr32[2] ^ \
 187                           (__force u32)(a)->s6_addr32[3] ^ \
 188                           (__force u32)(g)->s6_addr32[0] ^ \
 189                           (__force u32)(g)->s6_addr32[1] ^ \
 190                           (__force u32)(g)->s6_addr32[2] ^ \
 191                           (__force u32)(g)->s6_addr32[3]) % MFC6_LINES)
 192
 193 #define MFC_ASSERT_THRESH (3*HZ)                /* Maximal freq. of asserts */
 194
 195 #endif
 196
 197 #ifdef __KERNEL__
 198 struct rtmsg;
 199 extern int ip6mr_get_route(struct sk_buff *skb, struct rtmsg *rtm, int nowait);
 200
 201 #ifdef CONFIG_IPV6_MROUTE
 202 extern struct sock *mroute6_socket;
 203 extern int ip6mr_sk_done(struct sock *sk);
 204 #else
 205 #define mroute6_socket NULL
 206 static inline int ip6mr_sk_done(struct sock *sk) { return 0; }
 207 #endif
 208 #endif
 209
 210 /*
 211  * Structure used to communicate from kernel to multicast router.
 212  * We'll overlay the structure onto an MLD header (not an IPv6 heder like igmpmsg{}
 213  * used for IPv4 implementation). This is because this structure will be passed via an
 214  * IPv6 raw socket, on wich an application will only receiver the payload i.e the data after
 215  * the IPv6 header and all the extension headers. (See section 3 of RFC 3542)
 216  */
 217
 218 struct mrt6msg {
 219 #define MRT6MSG_NOCACHE         1
 220         __u8            im6_mbz;                /* must be zero            */
 221         __u8            im6_msgtype;            /* what type of message    */
 222         __u16           im6_mif;                /* mif rec'd on            */
 223         __u32           im6_pad;                /* padding for 64 bit arch */
 224         struct in6_addr im6_src, im6_dst;
 225 };
 226
 227 #endif