LXR linux/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      
  34typedef unsigned long vifbitmap_t;      /* User mode code depends on this lot */
  35typedef 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 
  54struct 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 
  71struct 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 
  87struct 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
 100struct 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 
 114struct 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
 132static inline int ip_mroute_opt(int opt)
 133{
 134        return (opt >= MRT_BASE) && (opt <= MRT_BASE + 10);
 135}
 136#else
 137static inline int ip_mroute_opt(int opt)
 138{
 139        return 0;
 140}
 141#endif
 142
 143extern int ip_mroute_setsockopt(struct sock *, int, char __user *, int);
 144extern int ip_mroute_getsockopt(struct sock *, int, char __user *, int __user *);
 145extern int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg);
 146extern void ip_mr_init(void);
 147
 148
 149struct 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
 163struct 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
 224struct pimreghdr
 225{
 226        __u8    type;
 227        __u8    reserved;
 228        __be16  csum;
 229        __be32  flags;
 230};
 231
 232extern int pim_rcv_v1(struct sk_buff *);
 233
 234struct rtmsg;
 235extern int ipmr_get_route(struct sk_buff *skb, struct rtmsg *rtm, int nowait);
 236#endif
 237
 238#endif
 239