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  */
  14 
  15 #define MRT_BASE        200
  16 #define MRT_INIT        (MRT_BASE)      /* Activate the kernel mroute code      */
  17 #define MRT_DONE        (MRT_BASE+1)    /* Shutdown the kernel mroute           */
  18 #define MRT_ADD_VIF     (MRT_BASE+2)    /* Add a virtual interface              */
  19 #define MRT_DEL_VIF     (MRT_BASE+3)    /* Delete a virtual interface           */
  20 #define MRT_ADD_MFC     (MRT_BASE+4)    /* Add a multicast forwarding entry     */
  21 #define MRT_DEL_MFC     (MRT_BASE+5)    /* Delete a multicast forwarding entry  */
  22 #define MRT_VERSION     (MRT_BASE+6)    /* Get the kernel multicast version     */
  23 #define MRT_ASSERT      (MRT_BASE+7)    /* Activate PIM assert mode             */
  24 
  25 #define SIOCGETVIFCNT   SIOCPROTOPRIVATE        /* IP protocol privates */
  26 #define SIOCGETSGCNT    (SIOCPROTOPRIVATE+1)
  27 
  28 #define MAXVIFS         32      
  29 typedef unsigned long vifbitmap_t;      /* User mode code depends on this lot */
  30 typedef unsigned short vifi_t;
  31 #define ALL_VIFS        ((vifi_t)(-1))
  32 
  33 /*
  34  *      Same idea as select
  35  */
  36  
  37 #define VIFM_SET(n,m)   ((m)|=(1<<(n)))
  38 #define VIFM_CLR(n,m)   ((m)&=~(1<<(n)))
  39 #define VIFM_ISSET(n,m) ((m)&(1<<(n)))
  40 #define VIFM_CLRALL(m)  ((m)=0)
  41 #define VIFM_COPY(mfrom,mto)    ((mto)=(mfrom))
  42 #define VIFM_SAME(m1,m2)        ((m1)==(m2))
  43 
  44 /*
  45  *      Passed by mrouted for an MRT_ADD_VIF - again we use the
  46  *      mrouted 3.6 structures for compatibility
  47  */
  48  
  49 struct vifctl {
  50         vifi_t  vifc_vifi;              /* Index of VIF */
  51         unsigned char vifc_flags;       /* VIFF_ flags */
  52         unsigned char vifc_threshold;   /* ttl limit */
  53         unsigned int vifc_rate_limit;   /* Rate limiter values (NI) */
  54         struct in_addr vifc_lcl_addr;   /* Our address */
  55         struct in_addr vifc_rmt_addr;   /* IPIP tunnel addr */
  56 };
  57 
  58 #define VIFF_TUNNEL     0x1             /* IPIP tunnel */
  59 #define VIFF_SRCRT      0x02            /* NI */
  60 
  61 /*
  62  *      Cache manipulation structures for mrouted
  63  */
  64  
  65 struct mfcctl
  66 {
  67         struct in_addr mfcc_origin;             /* Origin of mcast      */
  68         struct in_addr mfcc_mcastgrp;           /* Group in question    */
  69         vifi_t  mfcc_parent;                    /* Where it arrived     */
  70         unsigned char mfcc_ttls[MAXVIFS];       /* Where it is going    */
  71 };
  72 
  73 /* 
  74  *      Group count retrieval for mrouted
  75  */
  76  
  77 struct sioc_sg_req
  78 {
  79         struct in_addr src;
  80         struct in_addr grp;
  81         unsigned long pktcnt;
  82         unsigned long bytecnt;
  83         unsigned long wrong_if;
  84 };
  85 
  86 /*
  87  *      To get vif packet counts
  88  */
  89 
  90 struct sioc_vif_req
  91 {
  92         vifi_t  vifi;           /* Which iface */
  93         unsigned long icount;   /* In packets */
  94         unsigned long ocount;   /* Out packets */
  95         unsigned long ibytes;   /* In bytes */
  96         unsigned long obytes;   /* Out bytes */
  97 };
  98 
  99 /*
 100  *      This is the format the mroute daemon expects to see IGMP control
 101  *      data. Magically happens to be like an IP packet as per the original
 102  */
 103  
 104 struct igmpmsg
 105 {
 106         unsigned long unused1,unused2;
 107         unsigned char im_msgtype;               /* What is this */
 108         unsigned char im_mbz;                   /* Must be zero */
 109         unsigned char im_vif;                   /* Interface (this ought to be a vifi_t!) */
 110         unsigned char unused3;
 111         struct in_addr im_src,im_dst;
 112 };
 113 
 114 /*
 115  *      Thats all usermode folks
 116  */
 117 
 118 #ifdef __KERNEL__
 119 extern struct sock *mroute_socket;
 120 extern int ip_mroute_setsockopt(struct sock *, int, char *, int);
 121 extern int ip_mroute_getsockopt(struct sock *, int, char *, int *);
 122 extern int ipmr_ioctl(struct sock *sk, int cmd, unsigned long arg);
 123 extern void mroute_close(struct sock *sk);
 124 extern void ipmr_forward(struct sk_buff *skb, int is_frag);
 125 
 126 
 127 struct vif_device
 128 {
 129         struct device   *dev;                   /* Device we are using */
 130         struct route    *rt_cache;              /* Tunnel route cache */
 131         unsigned long   bytes_in,bytes_out;
 132         unsigned long   pkt_in,pkt_out;         /* Statistics                   */
 133         unsigned long   rate_limit;             /* Traffic shaping (NI)         */
 134         unsigned char   threshold;              /* TTL threshold                */
 135         unsigned short  flags;                  /* Control flags                */
 136         unsigned long   local,remote;           /* Addresses(remote for tunnels)*/
 137 };
 138 
 139 struct mfc_cache 
 140 {
 141         struct mfc_cache *next;                 /* Next entry on cache line     */
 142         __u32 mfc_mcastgrp;                     /* Group the entry belongs to   */
 143         __u32 mfc_origin;                       /* Source of packet             */
 144         vifi_t mfc_parent;                      /* Source interface             */
 145         struct timer_list mfc_timer;            /* Expiry timer                 */
 146         int mfc_flags;                          /* Flags on line                */
 147         struct sk_buff_head mfc_unresolved;     /* Unresolved buffers           */
 148         int mfc_queuelen;                       /* Unresolved buffer counter    */
 149         unsigned char mfc_ttls[MAXVIFS];        /* TTL thresholds               */
 150 };
 151 
 152 #define MFC_QUEUED              1
 153 #define MFC_RESOLVED            2
 154 
 155 
 156 #define MFC_LINES               64
 157 
 158 #ifdef __BIG_ENDIAN
 159 #define MFC_HASH(a,b)   ((((a)>>24)^((b)>>26))&(MFC_LINES-1))
 160 #else
 161 #define MFC_HASH(a,b)   (((a)^((b)>>2))&(MFC_LINES-1))
 162 #endif          
 163 
 164 #endif
 165 
 166 /*
 167  *      Pseudo messages used by mrouted
 168  */
 169 
 170 #define IGMPMSG_NOCACHE         1               /* Kernel cache fill request to mrouted */
 171 #define IGMPMSG_WRONGVIF        2               /* For PIM assert processing (unused) */
 172 
 173 #endif
/* */
root/include/linux/mroute.h

INCLUDED FROM
