include/linux/mroute.h

   1 #ifndef __LINUX_MROUTE_H
   2 #define __LINUX_MROUTE_H
   3
   4 #include <linux/in.h>
   5 #include <linux/pim.h>
   6 #include <net/sock.h>
   7 #include <uapi/linux/mroute.h>
   8
   9 #ifdef CONFIG_IP_MROUTE
  10 static inline int ip_mroute_opt(int opt)
  11 {
  12         return opt >= MRT_BASE && opt <= MRT_MAX;
  13 }
  14
  15 int ip_mroute_setsockopt(struct sock *, int, char __user *, unsigned int);
  16 int ip_mroute_getsockopt(struct sock *, int, char __user *, int __user *);
  17 int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg);
  18 int ipmr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg);
  19 int ip_mr_init(void);
  20 #else
  21 static inline int ip_mroute_setsockopt(struct sock *sock, int optname,
  22                                        char __user *optval, unsigned int optlen)
  23 {
  24         return -ENOPROTOOPT;
  25 }
  26
  27 static inline int ip_mroute_getsockopt(struct sock *sock, int optname,
  28                                        char __user *optval, int __user *optlen)
  29 {
  30         return -ENOPROTOOPT;
  31 }
  32
  33 static inline int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg)
  34 {
  35         return -ENOIOCTLCMD;
  36 }
  37
  38 static inline int ip_mr_init(void)
  39 {
  40         return 0;
  41 }
  42
  43 static inline int ip_mroute_opt(int opt)
  44 {
  45         return 0;
  46 }
  47 #endif
  48
  49 struct vif_device {
  50         struct net_device       *dev;                   /* Device we are using */
  51         unsigned long   bytes_in,bytes_out;
  52         unsigned long   pkt_in,pkt_out;         /* Statistics                   */
  53         unsigned long   rate_limit;             /* Traffic shaping (NI)         */
  54         unsigned char   threshold;              /* TTL threshold                */
  55         unsigned short  flags;                  /* Control flags                */
  56         __be32          local,remote;           /* Addresses(remote for tunnels)*/
  57         int             link;                   /* Physical interface index     */
  58 };
  59
  60 #define VIFF_STATIC 0x8000
  61
  62 #define VIF_EXISTS(_mrt, _idx) ((_mrt)->vif_table[_idx].dev != NULL)
  63 #define MFC_LINES 64
  64
  65 struct mr_table {
  66         struct list_head        list;
  67         possible_net_t          net;
  68         u32                     id;
  69         struct sock __rcu       *mroute_sk;
  70         struct timer_list       ipmr_expire_timer;
  71         struct list_head        mfc_unres_queue;
  72         struct list_head        mfc_cache_array[MFC_LINES];
  73         struct vif_device       vif_table[MAXVIFS];
  74         int                     maxvif;
  75         atomic_t                cache_resolve_queue_len;
  76         bool                    mroute_do_assert;
  77         bool                    mroute_do_pim;
  78         int                     mroute_reg_vif_num;
  79 };
  80
  81 /* mfc_flags:
  82  * MFC_STATIC - the entry was added statically (not by a routing daemon)
  83  */
  84 enum {
  85         MFC_STATIC = BIT(0),
  86 };
  87
  88 struct mfc_cache {
  89         struct list_head list;
  90         __be32 mfc_mcastgrp;                    /* Group the entry belongs to   */
  91         __be32 mfc_origin;                      /* Source of packet             */
  92         vifi_t mfc_parent;                      /* Source interface             */
  93         int mfc_flags;                          /* Flags on line                */
  94
  95         union {
  96                 struct {
  97                         unsigned long expires;
  98                         struct sk_buff_head unresolved; /* Unresolved buffers           */
  99                 } unres;
 100                 struct {
 101                         unsigned long last_assert;
 102                         int minvif;
 103                         int maxvif;
 104                         unsigned long bytes;
 105                         unsigned long pkt;
 106                         unsigned long wrong_if;
 107                         unsigned char ttls[MAXVIFS];    /* TTL thresholds               */
 108                 } res;
 109         } mfc_un;
 110         struct rcu_head rcu;
 111 };
 112
 113 #ifdef __BIG_ENDIAN
 114 #define MFC_HASH(a,b)   (((((__force u32)(__be32)a)>>24)^(((__force u32)(__be32)b)>>26))&(MFC_LINES-1))
 115 #else
 116 #define MFC_HASH(a,b)   ((((__force u32)(__be32)a)^(((__force u32)(__be32)b)>>2))&(MFC_LINES-1))
 117 #endif
 118
 119 struct rtmsg;
 120 int ipmr_get_route(struct net *net, struct sk_buff *skb,
 121                    __be32 saddr, __be32 daddr,
 122                    struct rtmsg *rtm, int nowait);
 123 #endif