include/linux/mroute.h

   1 #ifndef __LINUX_MROUTE_H
   2 #define __LINUX_MROUTE_H
   3
   4 #include <linux/sockios.h>
   5 #include <linux/in.h>
   6
   7 /*
   8  *      Based on the MROUTING 3.5 defines primarily to keep
   9  *      source compatibility with BSD.
  10  *
  11  *      See the mrouted 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 MRT_BASE        200
  19 #define MRT_INIT        (MRT_BASE)      /* Activate the kernel mroute code      */
  20 #define MRT_DONE        (MRT_BASE+1)    /* Shutdown the kernel mroute           */
  21 #define MRT_ADD_VIF     (MRT_BASE+2)    /* Add a virtual interface              */
  22 #define MRT_DEL_VIF     (MRT_BASE+3)    /* Delete a virtual interface           */
  23 #define MRT_ADD_MFC     (MRT_BASE+4)    /* Add a multicast forwarding entry     */
  24 #define MRT_DEL_MFC     (MRT_BASE+5)    /* Delete a multicast forwarding entry  */
  25 #define MRT_VERSION     (MRT_BASE+6)    /* Get the kernel multicast version     */
  26 #define MRT_ASSERT      (MRT_BASE+7)    /* Activate PIM assert mode             */
  27 #define MRT_PIM         (MRT_BASE+8)    /* enable PIM code      */
  28
  29 #define SIOCGETVIFCNT   SIOCPROTOPRIVATE        /* IP protocol privates */
  30 #define SIOCGETSGCNT    (SIOCPROTOPRIVATE+1)
  31 #define SIOCGETRPF      (SIOCPROTOPRIVATE+2)
  32
  33 #define MAXVIFS         32
  34 typedef unsigned long vifbitmap_t;      /* User mode code depends on this lot */
  35 typedef unsigned short vifi_t;
  36 #define ALL_VIFS        ((vifi_t)(-1))
  37
  38 /*
  39  *      Same idea as select
  40  */
  41
  42 #define VIFM_SET(n,m)   ((m)|=(1<<(n)))
  43 #define VIFM_CLR(n,m)   ((m)&=~(1<<(n)))
  44 #define VIFM_ISSET(n,m) ((m)&(1<<(n)))
  45 #define VIFM_CLRALL(m)  ((m)=0)
  46 #define VIFM_COPY(mfrom,mto)    ((mto)=(mfrom))
  47 #define VIFM_SAME(m1,m2)        ((m1)==(m2))
  48
  49 /*
  50  *      Passed by mrouted for an MRT_ADD_VIF - again we use the
  51  *      mrouted 3.6 structures for compatibility
  52  */
  53
  54 struct vifctl {
  55         vifi_t  vifc_vifi;              /* Index of VIF */
  56         unsigned char vifc_flags;       /* VIFF_ flags */
  57         unsigned char vifc_threshold;   /* ttl limit */
  58         unsigned int vifc_rate_limit;   /* Rate limiter values (NI) */
  59         struct in_addr vifc_lcl_addr;   /* Our address */
  60         struct in_addr vifc_rmt_addr;   /* IPIP tunnel addr */
  61 };
  62
  63 #define VIFF_TUNNEL     0x1     /* IPIP tunnel */
  64 #define VIFF_SRCRT      0x2     /* NI */
  65 #define VIFF_REGISTER   0x4     /* register vif */
  66
  67 /*
  68  *      Cache manipulation structures for mrouted and PIMd
  69  */
  70
  71 struct mfcctl
  72 {
  73         struct in_addr mfcc_origin;             /* Origin of mcast      */
  74         struct in_addr mfcc_mcastgrp;           /* Group in question    */
  75         vifi_t  mfcc_parent;                    /* Where it arrived     */
  76         unsigned char mfcc_ttls[MAXVIFS];       /* Where it is going    */
  77         unsigned int mfcc_pkt_cnt;              /* pkt count for src-grp */
  78         unsigned int mfcc_byte_cnt;
  79         unsigned int mfcc_wrong_if;
  80         int          mfcc_expire;
  81 };
  82
  83 /*
  84  *      Group count retrieval for mrouted
  85  */
  86
  87 struct sioc_sg_req
  88 {
  89         struct in_addr src;
  90         struct in_addr grp;
  91         unsigned long pktcnt;
  92         unsigned long bytecnt;
  93         unsigned long wrong_if;
  94 };
  95
  96 /*
  97  *      To get vif packet counts
  98  */
  99
 100 struct sioc_vif_req
 101 {
 102         vifi_t  vifi;           /* Which iface */
 103         unsigned long icount;   /* In packets */
 104         unsigned long ocount;   /* Out packets */
 105         unsigned long ibytes;   /* In bytes */
 106         unsigned long obytes;   /* Out bytes */
 107 };
 108
 109 /*
 110  *      This is the format the mroute daemon expects to see IGMP control
 111  *      data. Magically happens to be like an IP packet as per the original
 112  */
 113
 114 struct igmpmsg
 115 {
 116         __u32 unused1,unused2;
 117         unsigned char im_msgtype;               /* What is this */
 118         unsigned char im_mbz;                   /* Must be zero */
 119         unsigned char im_vif;                   /* Interface (this ought to be a vifi_t!) */
 120         unsigned char unused3;
 121         struct in_addr im_src,im_dst;
 122 };
 123
 124 /*
 125  *      That's all usermode folks
 126  */
 127
 128 #ifdef __KERNEL__
 129 #include <net/sock.h>
 130
 131 #ifdef CONFIG_IP_MROUTE
 132 static inline int ip_mroute_opt(int opt)
 133 {
 134         return (opt >= MRT_BASE) && (opt <= MRT_BASE + 10);
 135 }
 136 #else
 137 static inline int ip_mroute_opt(int opt)
 138 {
 139         return 0;
 140 }
 141 #endif
 142
 143 extern int ip_mroute_setsockopt(struct sock *, int, char __user *, int);
 144 extern int ip_mroute_getsockopt(struct sock *, int, char __user *, int __user *);
 145 extern int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg);
 146 extern void ip_mr_init(void);
 147
 148
 149 struct vif_device
 150 {
 151         struct net_device       *dev;                   /* Device we are using */
 152         unsigned long   bytes_in,bytes_out;
 153         unsigned long   pkt_in,pkt_out;         /* Statistics                   */
 154         unsigned long   rate_limit;             /* Traffic shaping (NI)         */
 155         unsigned char   threshold;              /* TTL threshold                */
 156         unsigned short  flags;                  /* Control flags                */
 157         __be32          local,remote;           /* Addresses(remote for tunnels)*/
 158         int             link;                   /* Physical interface index     */
 159 };
 160
 161 #define VIFF_STATIC 0x8000
 162
 163 struct mfc_cache
 164 {
 165         struct mfc_cache *next;                 /* Next entry on cache line     */
 166         __be32 mfc_mcastgrp;                    /* Group the entry belongs to   */
 167         __be32 mfc_origin;                      /* Source of packet             */
 168         vifi_t mfc_parent;                      /* Source interface             */
 169         int mfc_flags;                          /* Flags on line                */
 170
 171         union {
 172                 struct {
 173                         unsigned long expires;
 174                         struct sk_buff_head unresolved; /* Unresolved buffers           */
 175                 } unres;
 176                 struct {
 177                         unsigned long last_assert;
 178                         int minvif;
 179                         int maxvif;
 180                         unsigned long bytes;
 181                         unsigned long pkt;
 182                         unsigned long wrong_if;
 183                         unsigned char ttls[MAXVIFS];    /* TTL thresholds               */
 184                 } res;
 185         } mfc_un;
 186 };
 187
 188 #define MFC_STATIC              1
 189 #define MFC_NOTIFY              2
 190
 191 #define MFC_LINES               64
 192
 193 #ifdef __BIG_ENDIAN
 194 #define MFC_HASH(a,b)   (((((__force u32)(__be32)a)>>24)^(((__force u32)(__be32)b)>>26))&(MFC_LINES-1))
 195 #else
 196 #define MFC_HASH(a,b)   ((((__force u32)(__be32)a)^(((__force u32)(__be32)b)>>2))&(MFC_LINES-1))
 197 #endif
 198
 199 #endif
 200
 201
 202 #define MFC_ASSERT_THRESH (3*HZ)                /* Maximal freq. of asserts */
 203
 204 /*
 205  *      Pseudo messages used by mrouted
 206  */
 207
 208 #define IGMPMSG_NOCACHE         1               /* Kern cache fill request to mrouted */
 209 #define IGMPMSG_WRONGVIF        2               /* For PIM assert processing (unused) */
 210 #define IGMPMSG_WHOLEPKT        3               /* For PIM Register processing */
 211
 212 #ifdef __KERNEL__
 213
 214 #define PIM_V1_VERSION          __constant_htonl(0x10000000)
 215 #define PIM_V1_REGISTER         1
 216
 217 #define PIM_VERSION             2
 218 #define PIM_REGISTER            1
 219
 220 #define PIM_NULL_REGISTER       __constant_htonl(0x40000000)
 221
 222 /* PIMv2 register message header layout (ietf-draft-idmr-pimvsm-v2-00.ps */
 223
 224 struct pimreghdr
 225 {
 226         __u8    type;
 227         __u8    reserved;
 228         __be16  csum;
 229         __be32  flags;
 230 };
 231
 232 extern int pim_rcv_v1(struct sk_buff *);
 233
 234 struct rtmsg;
 235 extern int ipmr_get_route(struct sk_buff *skb, struct rtmsg *rtm, int nowait);
 236 #endif
 237
 238 #endif