linux/include/linux/mroute.h
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   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      
  38typedef unsigned long vifbitmap_t;      /* User mode code depends on this lot */
  39typedef 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 
  58struct 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 
  80struct 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 
  95struct 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
 107struct 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 
 120struct 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
 138static inline int ip_mroute_opt(int opt)
 139{
 140        return (opt >= MRT_BASE) && (opt <= MRT_BASE + 10);
 141}
 142#else
 143static inline int ip_mroute_opt(int opt)
 144{
 145        return 0;
 146}
 147#endif
 148
 149#ifdef CONFIG_IP_MROUTE
 150extern int ip_mroute_setsockopt(struct sock *, int, char __user *, unsigned int);
 151extern int ip_mroute_getsockopt(struct sock *, int, char __user *, int __user *);
 152extern int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg);
 153extern int ipmr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg);
 154extern int ip_mr_init(void);
 155#else
 156static inline
 157int ip_mroute_setsockopt(struct sock *sock,
 158                         int optname, char __user *optval, unsigned int optlen)
 159{
 160        return -ENOPROTOOPT;
 161}
 162
 163static inline
 164int ip_mroute_getsockopt(struct sock *sock,
 165                         int optname, char __user *optval, int __user *optlen)
 166{
 167        return -ENOPROTOOPT;
 168}
 169
 170static inline
 171int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg)
 172{
 173        return -ENOIOCTLCMD;
 174}
 175
 176static inline int ip_mr_init(void)
 177{
 178        return 0;
 179}
 180#endif
 181
 182struct 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
 195struct 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__
 245struct rtmsg;
 246extern 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
 252
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