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 #define MRT_TABLE       (MRT_BASE+9)    /* Specify mroute table ID              */
  32
  33 #define SIOCGETVIFCNT   SIOCPROTOPRIVATE        /* IP protocol privates */
  34 #define SIOCGETSGCNT    (SIOCPROTOPRIVATE+1)
  35 #define SIOCGETRPF      (SIOCPROTOPRIVATE+2)
  36
  37 #define MAXVIFS         32
  38 typedef unsigned long vifbitmap_t;      /* User mode code depends on this lot */
  39 typedef unsigned short vifi_t;
  40 #define ALL_VIFS        ((vifi_t)(-1))
  41
  42 /*
  43  *      Same idea as select
  44  */
  45
  46 #define VIFM_SET(n,m)   ((m)|=(1<<(n)))
  47 #define VIFM_CLR(n,m)   ((m)&=~(1<<(n)))
  48 #define VIFM_ISSET(n,m) ((m)&(1<<(n)))
  49 #define VIFM_CLRALL(m)  ((m)=0)
  50 #define VIFM_COPY(mfrom,mto)    ((mto)=(mfrom))
  51 #define VIFM_SAME(m1,m2)        ((m1)==(m2))
  52
  53 /*
  54  *      Passed by mrouted for an MRT_ADD_VIF - again we use the
  55  *      mrouted 3.6 structures for compatibility
  56  */
  57
  58 struct vifctl {
  59         vifi_t  vifc_vifi;              /* Index of VIF */
  60         unsigned char vifc_flags;       /* VIFF_ flags */
  61         unsigned char vifc_threshold;   /* ttl limit */
  62         unsigned int vifc_rate_limit;   /* Rate limiter values (NI) */
  63         union {
  64                 struct in_addr vifc_lcl_addr;     /* Local interface address */
  65                 int            vifc_lcl_ifindex;  /* Local interface index   */
  66         };
  67         struct in_addr vifc_rmt_addr;   /* IPIP tunnel addr */
  68 };
  69
  70 #define VIFF_TUNNEL             0x1     /* IPIP tunnel */
  71 #define VIFF_SRCRT              0x2     /* NI */
  72 #define VIFF_REGISTER           0x4     /* register vif */
  73 #define VIFF_USE_IFINDEX        0x8     /* use vifc_lcl_ifindex instead of
  74                                            vifc_lcl_addr to find an interface */
  75
  76 /*
  77  *      Cache manipulation structures for mrouted and PIMd
  78  */
  79
  80 struct mfcctl {
  81         struct in_addr mfcc_origin;             /* Origin of mcast      */
  82         struct in_addr mfcc_mcastgrp;           /* Group in question    */
  83         vifi_t  mfcc_parent;                    /* Where it arrived     */
  84         unsigned char mfcc_ttls[MAXVIFS];       /* Where it is going    */
  85         unsigned int mfcc_pkt_cnt;              /* pkt count for src-grp */
  86         unsigned int mfcc_byte_cnt;
  87         unsigned int mfcc_wrong_if;
  88         int          mfcc_expire;
  89 };
  90
  91 /*
  92  *      Group count retrieval for mrouted
  93  */
  94
  95 struct sioc_sg_req {
  96         struct in_addr src;
  97         struct in_addr grp;
  98         unsigned long pktcnt;
  99         unsigned long bytecnt;
 100         unsigned long wrong_if;
 101 };
 102
 103 /*
 104  *      To get vif packet counts
 105  */
 106
 107 struct sioc_vif_req {
 108         vifi_t  vifi;           /* Which iface */
 109         unsigned long icount;   /* In packets */
 110         unsigned long ocount;   /* Out packets */
 111         unsigned long ibytes;   /* In bytes */
 112         unsigned long obytes;   /* Out bytes */
 113 };
 114
 115 /*
 116  *      This is the format the mroute daemon expects to see IGMP control
 117  *      data. Magically happens to be like an IP packet as per the original
 118  */
 119
 120 struct igmpmsg {
 121         __u32 unused1,unused2;
 122         unsigned char im_msgtype;               /* What is this */
 123         unsigned char im_mbz;                   /* Must be zero */
 124         unsigned char im_vif;                   /* Interface (this ought to be a vifi_t!) */
 125         unsigned char unused3;
 126         struct in_addr im_src,im_dst;
 127 };
 128
 129 /*
 130  *      That's all usermode folks
 131  */
 132
 133 #ifdef __KERNEL__
 134 #include <linux/pim.h>
 135 #include <net/sock.h>
 136
 137 #ifdef CONFIG_IP_MROUTE
 138 static inline int ip_mroute_opt(int opt)
 139 {
 140         return (opt >= MRT_BASE) && (opt <= MRT_BASE + 10);
 141 }
 142 #else
 143 static inline int ip_mroute_opt(int opt)
 144 {
 145         return 0;
 146 }
 147 #endif
 148
 149 #ifdef CONFIG_IP_MROUTE
 150 extern int ip_mroute_setsockopt(struct sock *, int, char __user *, unsigned int);
 151 extern int ip_mroute_getsockopt(struct sock *, int, char __user *, int __user *);
 152 extern int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg);
 153 extern int ipmr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg);
 154 extern int ip_mr_init(void);
 155 #else
 156 static inline
 157 int ip_mroute_setsockopt(struct sock *sock,
 158                          int optname, char __user *optval, unsigned int optlen)
 159 {
 160         return -ENOPROTOOPT;
 161 }
 162
 163 static inline
 164 int ip_mroute_getsockopt(struct sock *sock,
 165                          int optname, char __user *optval, int __user *optlen)
 166 {
 167         return -ENOPROTOOPT;
 168 }
 169
 170 static inline
 171 int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg)
 172 {
 173         return -ENOIOCTLCMD;
 174 }
 175
 176 static inline int ip_mr_init(void)
 177 {
 178         return 0;
 179 }
 180 #endif
 181
 182 struct vif_device {
 183         struct net_device       *dev;                   /* Device we are using */
 184         unsigned long   bytes_in,bytes_out;
 185         unsigned long   pkt_in,pkt_out;         /* Statistics                   */
 186         unsigned long   rate_limit;             /* Traffic shaping (NI)         */
 187         unsigned char   threshold;              /* TTL threshold                */
 188         unsigned short  flags;                  /* Control flags                */
 189         __be32          local,remote;           /* Addresses(remote for tunnels)*/
 190         int             link;                   /* Physical interface index     */
 191 };
 192
 193 #define VIFF_STATIC 0x8000
 194
 195 struct mfc_cache {
 196         struct list_head list;
 197         __be32 mfc_mcastgrp;                    /* Group the entry belongs to   */
 198         __be32 mfc_origin;                      /* Source of packet             */
 199         vifi_t mfc_parent;                      /* Source interface             */
 200         int mfc_flags;                          /* Flags on line                */
 201
 202         union {
 203                 struct {
 204                         unsigned long expires;
 205                         struct sk_buff_head unresolved; /* Unresolved buffers           */
 206                 } unres;
 207                 struct {
 208                         unsigned long last_assert;
 209                         int minvif;
 210                         int maxvif;
 211                         unsigned long bytes;
 212                         unsigned long pkt;
 213                         unsigned long wrong_if;
 214                         unsigned char ttls[MAXVIFS];    /* TTL thresholds               */
 215                 } res;
 216         } mfc_un;
 217         struct rcu_head rcu;
 218 };
 219
 220 #define MFC_STATIC              1
 221 #define MFC_NOTIFY              2
 222
 223 #define MFC_LINES               64
 224
 225 #ifdef __BIG_ENDIAN
 226 #define MFC_HASH(a,b)   (((((__force u32)(__be32)a)>>24)^(((__force u32)(__be32)b)>>26))&(MFC_LINES-1))
 227 #else
 228 #define MFC_HASH(a,b)   ((((__force u32)(__be32)a)^(((__force u32)(__be32)b)>>2))&(MFC_LINES-1))
 229 #endif
 230
 231 #endif
 232
 233
 234 #define MFC_ASSERT_THRESH (3*HZ)                /* Maximal freq. of asserts */
 235
 236 /*
 237  *      Pseudo messages used by mrouted
 238  */
 239
 240 #define IGMPMSG_NOCACHE         1               /* Kern cache fill request to mrouted */
 241 #define IGMPMSG_WRONGVIF        2               /* For PIM assert processing (unused) */
 242 #define IGMPMSG_WHOLEPKT        3               /* For PIM Register processing */
 243
 244 #ifdef __KERNEL__
 245 struct rtmsg;
 246 extern int ipmr_get_route(struct net *net, struct sk_buff *skb,
 247                           __be32 saddr, __be32 daddr,
 248                           struct rtmsg *rtm, int nowait);
 249 #endif
 250
 251 #endif