include/linux/mroute.h

   1 #ifndef __LINUX_MROUTE_H
   2 #define __LINUX_MROUTE_H
   3
   4 #include <linux/sockios.h>
   5 #include <linux/types.h>
   6 #ifdef __KERNEL__
   7 #include <linux/in.h>
   8 #endif
   9
  10 /*
  11  *      Based on the MROUTING 3.5 defines primarily to keep
  12  *      source compatibility with BSD.
  13  *
  14  *      See the mrouted code for the original history.
  15  *
  16  *      Protocol Independent Multicast (PIM) data structures included
  17  *      Carlos Picoto (cap@di.fc.ul.pt)
  18  *
  19  */
  20
  21 #define MRT_BASE        200
  22 #define MRT_INIT        (MRT_BASE)      /* Activate the kernel mroute code      */
  23 #define MRT_DONE        (MRT_BASE+1)    /* Shutdown the kernel mroute           */
  24 #define MRT_ADD_VIF     (MRT_BASE+2)    /* Add a virtual interface              */
  25 #define MRT_DEL_VIF     (MRT_BASE+3)    /* Delete a virtual interface           */
  26 #define MRT_ADD_MFC     (MRT_BASE+4)    /* Add a multicast forwarding entry     */
  27 #define MRT_DEL_MFC     (MRT_BASE+5)    /* Delete a multicast forwarding entry  */
  28 #define MRT_VERSION     (MRT_BASE+6)    /* Get the kernel multicast version     */
  29 #define MRT_ASSERT      (MRT_BASE+7)    /* Activate PIM assert mode             */
  30 #define MRT_PIM         (MRT_BASE+8)    /* enable PIM code      */
  31
  32 #define SIOCGETVIFCNT   SIOCPROTOPRIVATE        /* IP protocol privates */
  33 #define SIOCGETSGCNT    (SIOCPROTOPRIVATE+1)
  34 #define SIOCGETRPF      (SIOCPROTOPRIVATE+2)
  35
  36 #define MAXVIFS         32
  37 typedef unsigned long vifbitmap_t;      /* User mode code depends on this lot */
  38 typedef unsigned short vifi_t;
  39 #define ALL_VIFS        ((vifi_t)(-1))
  40
  41 /*
  42  *      Same idea as select
  43  */
  44
  45 #define VIFM_SET(n,m)   ((m)|=(1<<(n)))
  46 #define VIFM_CLR(n,m)   ((m)&=~(1<<(n)))
  47 #define VIFM_ISSET(n,m) ((m)&(1<<(n)))
  48 #define VIFM_CLRALL(m)  ((m)=0)
  49 #define VIFM_COPY(mfrom,mto)    ((mto)=(mfrom))
  50 #define VIFM_SAME(m1,m2)        ((m1)==(m2))
  51
  52 /*
  53  *      Passed by mrouted for an MRT_ADD_VIF - again we use the
  54  *      mrouted 3.6 structures for compatibility
  55  */
  56
  57 struct vifctl {
  58         vifi_t  vifc_vifi;              /* Index of VIF */
  59         unsigned char vifc_flags;       /* VIFF_ flags */
  60         unsigned char vifc_threshold;   /* ttl limit */
  61         unsigned int vifc_rate_limit;   /* Rate limiter values (NI) */
  62         struct in_addr vifc_lcl_addr;   /* Our address */
  63         struct in_addr vifc_rmt_addr;   /* IPIP tunnel addr */
  64 };
  65
  66 #define VIFF_TUNNEL     0x1     /* IPIP tunnel */
  67 #define VIFF_SRCRT      0x2     /* NI */
  68 #define VIFF_REGISTER   0x4     /* register vif */
  69
  70 /*
  71  *      Cache manipulation structures for mrouted and PIMd
  72  */
  73
  74 struct mfcctl
  75 {
  76         struct in_addr mfcc_origin;             /* Origin of mcast      */
  77         struct in_addr mfcc_mcastgrp;           /* Group in question    */
  78         vifi_t  mfcc_parent;                    /* Where it arrived     */
  79         unsigned char mfcc_ttls[MAXVIFS];       /* Where it is going    */
  80         unsigned int mfcc_pkt_cnt;              /* pkt count for src-grp */
  81         unsigned int mfcc_byte_cnt;
  82         unsigned int mfcc_wrong_if;
  83         int          mfcc_expire;
  84 };
  85
  86 /*
  87  *      Group count retrieval for mrouted
  88  */
  89
  90 struct sioc_sg_req
  91 {
  92         struct in_addr src;
  93         struct in_addr 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_vif_req
 104 {
 105         vifi_t  vifi;           /* 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  *      This is the format the mroute daemon expects to see IGMP control
 114  *      data. Magically happens to be like an IP packet as per the original
 115  */
 116
 117 struct igmpmsg
 118 {
 119         __u32 unused1,unused2;
 120         unsigned char im_msgtype;               /* What is this */
 121         unsigned char im_mbz;                   /* Must be zero */
 122         unsigned char im_vif;                   /* Interface (this ought to be a vifi_t!) */
 123         unsigned char unused3;
 124         struct in_addr im_src,im_dst;
 125 };
 126
 127 /*
 128  *      That's all usermode folks
 129  */
 130
 131 #ifdef __KERNEL__
 132 #include <linux/pim.h>
 133 #include <net/sock.h>
 134
 135 #ifdef CONFIG_IP_MROUTE
 136 static inline int ip_mroute_opt(int opt)
 137 {
 138         return (opt >= MRT_BASE) && (opt <= MRT_BASE + 10);
 139 }
 140 #else
 141 static inline int ip_mroute_opt(int opt)
 142 {
 143         return 0;
 144 }
 145 #endif
 146
 147 #ifdef CONFIG_IP_MROUTE
 148 extern int ip_mroute_setsockopt(struct sock *, int, char __user *, int);
 149 extern int ip_mroute_getsockopt(struct sock *, int, char __user *, int __user *);
 150 extern int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg);
 151 extern int ip_mr_init(void);
 152 #else
 153 static inline
 154 int ip_mroute_setsockopt(struct sock *sock,
 155                          int optname, char __user *optval, int optlen)
 156 {
 157         return -ENOPROTOOPT;
 158 }
 159
 160 static inline
 161 int ip_mroute_getsockopt(struct sock *sock,
 162                          int optname, char __user *optval, int __user *optlen)
 163 {
 164         return -ENOPROTOOPT;
 165 }
 166
 167 static inline
 168 int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg)
 169 {
 170         return -ENOIOCTLCMD;
 171 }
 172
 173 static inline int ip_mr_init(void)
 174 {
 175         return 0;
 176 }
 177 #endif
 178
 179 struct vif_device
 180 {
 181         struct net_device       *dev;                   /* Device we are using */
 182         unsigned long   bytes_in,bytes_out;
 183         unsigned long   pkt_in,pkt_out;         /* Statistics                   */
 184         unsigned long   rate_limit;             /* Traffic shaping (NI)         */
 185         unsigned char   threshold;              /* TTL threshold                */
 186         unsigned short  flags;                  /* Control flags                */
 187         __be32          local,remote;           /* Addresses(remote for tunnels)*/
 188         int             link;                   /* Physical interface index     */
 189 };
 190
 191 #define VIFF_STATIC 0x8000
 192
 193 struct mfc_cache
 194 {
 195         struct mfc_cache *next;                 /* Next entry on cache line     */
 196 #ifdef CONFIG_NET_NS
 197         struct net *mfc_net;
 198 #endif
 199         __be32 mfc_mcastgrp;                    /* Group the entry belongs to   */
 200         __be32 mfc_origin;                      /* Source of packet             */
 201         vifi_t mfc_parent;                      /* Source interface             */
 202         int mfc_flags;                          /* Flags on line                */
 203
 204         union {
 205                 struct {
 206                         unsigned long expires;
 207                         struct sk_buff_head unresolved; /* Unresolved buffers           */
 208                 } unres;
 209                 struct {
 210                         unsigned long last_assert;
 211                         int minvif;
 212                         int maxvif;
 213                         unsigned long bytes;
 214                         unsigned long pkt;
 215                         unsigned long wrong_if;
 216                         unsigned char ttls[MAXVIFS];    /* TTL thresholds               */
 217                 } res;
 218         } mfc_un;
 219 };
 220
 221 static inline
 222 struct net *mfc_net(const struct mfc_cache *mfc)
 223 {
 224         return read_pnet(&mfc->mfc_net);
 225 }
 226
 227 static inline
 228 void mfc_net_set(struct mfc_cache *mfc, struct net *net)
 229 {
 230         write_pnet(&mfc->mfc_net, hold_net(net));
 231 }
 232
 233 #define MFC_STATIC              1
 234 #define MFC_NOTIFY              2
 235
 236 #define MFC_LINES               64
 237
 238 #ifdef __BIG_ENDIAN
 239 #define MFC_HASH(a,b)   (((((__force u32)(__be32)a)>>24)^(((__force u32)(__be32)b)>>26))&(MFC_LINES-1))
 240 #else
 241 #define MFC_HASH(a,b)   ((((__force u32)(__be32)a)^(((__force u32)(__be32)b)>>2))&(MFC_LINES-1))
 242 #endif
 243
 244 #endif
 245
 246
 247 #define MFC_ASSERT_THRESH (3*HZ)                /* Maximal freq. of asserts */
 248
 249 /*
 250  *      Pseudo messages used by mrouted
 251  */
 252
 253 #define IGMPMSG_NOCACHE         1               /* Kern cache fill request to mrouted */
 254 #define IGMPMSG_WRONGVIF        2               /* For PIM assert processing (unused) */
 255 #define IGMPMSG_WHOLEPKT        3               /* For PIM Register processing */
 256
 257 #ifdef __KERNEL__
 258 struct rtmsg;
 259 extern int ipmr_get_route(struct net *net, struct sk_buff *skb,
 260                           struct rtmsg *rtm, int nowait);
 261 #endif
 262
 263 #endif