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 <linux/rhashtable.h>
   7 #include <net/sock.h>
   8 #include <uapi/linux/mroute.h>
   9
  10 #ifdef CONFIG_IP_MROUTE
  11 static inline int ip_mroute_opt(int opt)
  12 {
  13         return opt >= MRT_BASE && opt <= MRT_MAX;
  14 }
  15
  16 int ip_mroute_setsockopt(struct sock *, int, char __user *, unsigned int);
  17 int ip_mroute_getsockopt(struct sock *, int, char __user *, int __user *);
  18 int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg);
  19 int ipmr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg);
  20 int ip_mr_init(void);
  21 #else
  22 static inline int ip_mroute_setsockopt(struct sock *sock, int optname,
  23                                        char __user *optval, unsigned int optlen)
  24 {
  25         return -ENOPROTOOPT;
  26 }
  27
  28 static inline int ip_mroute_getsockopt(struct sock *sock, int optname,
  29                                        char __user *optval, int __user *optlen)
  30 {
  31         return -ENOPROTOOPT;
  32 }
  33
  34 static inline int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg)
  35 {
  36         return -ENOIOCTLCMD;
  37 }
  38
  39 static inline int ip_mr_init(void)
  40 {
  41         return 0;
  42 }
  43
  44 static inline int ip_mroute_opt(int opt)
  45 {
  46         return 0;
  47 }
  48 #endif
  49
  50 struct vif_device {
  51         struct net_device       *dev;                   /* Device we are using */
  52         unsigned long   bytes_in,bytes_out;
  53         unsigned long   pkt_in,pkt_out;         /* Statistics                   */
  54         unsigned long   rate_limit;             /* Traffic shaping (NI)         */
  55         unsigned char   threshold;              /* TTL threshold                */
  56         unsigned short  flags;                  /* Control flags                */
  57         __be32          local,remote;           /* Addresses(remote for tunnels)*/
  58         int             link;                   /* Physical interface index     */
  59 };
  60
  61 #define VIFF_STATIC 0x8000
  62
  63 #define VIF_EXISTS(_mrt, _idx) ((_mrt)->vif_table[_idx].dev != NULL)
  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 vif_device       vif_table[MAXVIFS];
  73         struct rhltable         mfc_hash;
  74         struct list_head        mfc_cache_list;
  75         int                     maxvif;
  76         atomic_t                cache_resolve_queue_len;
  77         bool                    mroute_do_assert;
  78         bool                    mroute_do_pim;
  79         int                     mroute_reg_vif_num;
  80 };
  81
  82 /* mfc_flags:
  83  * MFC_STATIC - the entry was added statically (not by a routing daemon)
  84  */
  85 enum {
  86         MFC_STATIC = BIT(0),
  87 };
  88
  89 struct mfc_cache_cmp_arg {
  90         __be32 mfc_mcastgrp;
  91         __be32 mfc_origin;
  92 };
  93
  94 /**
  95  * struct mfc_cache - multicast routing entries
  96  * @mnode: rhashtable list
  97  * @mfc_mcastgrp: destination multicast group address
  98  * @mfc_origin: source address
  99  * @cmparg: used for rhashtable comparisons
 100  * @mfc_parent: source interface (iif)
 101  * @mfc_flags: entry flags
 102  * @expires: unresolved entry expire time
 103  * @unresolved: unresolved cached skbs
 104  * @last_assert: time of last assert
 105  * @minvif: minimum VIF id
 106  * @maxvif: maximum VIF id
 107  * @bytes: bytes that have passed for this entry
 108  * @pkt: packets that have passed for this entry
 109  * @wrong_if: number of wrong source interface hits
 110  * @lastuse: time of last use of the group (traffic or update)
 111  * @ttls: OIF TTL threshold array
 112  * @list: global entry list
 113  * @rcu: used for entry destruction
 114  */
 115 struct mfc_cache {
 116         struct rhlist_head mnode;
 117         union {
 118                 struct {
 119                         __be32 mfc_mcastgrp;
 120                         __be32 mfc_origin;
 121                 };
 122                 struct mfc_cache_cmp_arg cmparg;
 123         };
 124         vifi_t mfc_parent;
 125         int mfc_flags;
 126
 127         union {
 128                 struct {
 129                         unsigned long expires;
 130                         struct sk_buff_head unresolved;
 131                 } unres;
 132                 struct {
 133                         unsigned long last_assert;
 134                         int minvif;
 135                         int maxvif;
 136                         unsigned long bytes;
 137                         unsigned long pkt;
 138                         unsigned long wrong_if;
 139                         unsigned long lastuse;
 140                         unsigned char ttls[MAXVIFS];
 141                 } res;
 142         } mfc_un;
 143         struct list_head list;
 144         struct rcu_head rcu;
 145 };
 146
 147 struct rtmsg;
 148 int ipmr_get_route(struct net *net, struct sk_buff *skb,
 149                    __be32 saddr, __be32 daddr,
 150                    struct rtmsg *rtm, u32 portid);
 151 #endif