include/linux/mroute.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __LINUX_MROUTE_H
   3 #define __LINUX_MROUTE_H
   4
   5 #include <linux/in.h>
   6 #include <linux/pim.h>
   7 #include <linux/rhashtable.h>
   8 #include <net/sock.h>
   9 #include <uapi/linux/mroute.h>
  10
  11 #ifdef CONFIG_IP_MROUTE
  12 static inline int ip_mroute_opt(int opt)
  13 {
  14         return opt >= MRT_BASE && opt <= MRT_MAX;
  15 }
  16
  17 int ip_mroute_setsockopt(struct sock *, int, char __user *, unsigned int);
  18 int ip_mroute_getsockopt(struct sock *, int, char __user *, int __user *);
  19 int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg);
  20 int ipmr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg);
  21 int ip_mr_init(void);
  22 #else
  23 static inline int ip_mroute_setsockopt(struct sock *sock, int optname,
  24                                        char __user *optval, unsigned int optlen)
  25 {
  26         return -ENOPROTOOPT;
  27 }
  28
  29 static inline int ip_mroute_getsockopt(struct sock *sock, int optname,
  30                                        char __user *optval, int __user *optlen)
  31 {
  32         return -ENOPROTOOPT;
  33 }
  34
  35 static inline int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg)
  36 {
  37         return -ENOIOCTLCMD;
  38 }
  39
  40 static inline int ip_mr_init(void)
  41 {
  42         return 0;
  43 }
  44
  45 static inline int ip_mroute_opt(int opt)
  46 {
  47         return 0;
  48 }
  49 #endif
  50
  51 struct vif_device {
  52         struct net_device       *dev;                   /* Device we are using */
  53         unsigned long   bytes_in,bytes_out;
  54         unsigned long   pkt_in,pkt_out;         /* Statistics                   */
  55         unsigned long   rate_limit;             /* Traffic shaping (NI)         */
  56         unsigned char   threshold;              /* TTL threshold                */
  57         unsigned short  flags;                  /* Control flags                */
  58         __be32          local,remote;           /* Addresses(remote for tunnels)*/
  59         int             link;                   /* Physical interface index     */
  60 };
  61
  62 #define VIFF_STATIC 0x8000
  63
  64 #define VIF_EXISTS(_mrt, _idx) ((_mrt)->vif_table[_idx].dev != NULL)
  65
  66 struct mr_table {
  67         struct list_head        list;
  68         possible_net_t          net;
  69         u32                     id;
  70         struct sock __rcu       *mroute_sk;
  71         struct timer_list       ipmr_expire_timer;
  72         struct list_head        mfc_unres_queue;
  73         struct vif_device       vif_table[MAXVIFS];
  74         struct rhltable         mfc_hash;
  75         struct list_head        mfc_cache_list;
  76         int                     maxvif;
  77         atomic_t                cache_resolve_queue_len;
  78         bool                    mroute_do_assert;
  79         bool                    mroute_do_pim;
  80         int                     mroute_reg_vif_num;
  81 };
  82
  83 /* mfc_flags:
  84  * MFC_STATIC - the entry was added statically (not by a routing daemon)
  85  */
  86 enum {
  87         MFC_STATIC = BIT(0),
  88 };
  89
  90 struct mfc_cache_cmp_arg {
  91         __be32 mfc_mcastgrp;
  92         __be32 mfc_origin;
  93 };
  94
  95 /**
  96  * struct mfc_cache - multicast routing entries
  97  * @mnode: rhashtable list
  98  * @mfc_mcastgrp: destination multicast group address
  99  * @mfc_origin: source address
 100  * @cmparg: used for rhashtable comparisons
 101  * @mfc_parent: source interface (iif)
 102  * @mfc_flags: entry flags
 103  * @expires: unresolved entry expire time
 104  * @unresolved: unresolved cached skbs
 105  * @last_assert: time of last assert
 106  * @minvif: minimum VIF id
 107  * @maxvif: maximum VIF id
 108  * @bytes: bytes that have passed for this entry
 109  * @pkt: packets that have passed for this entry
 110  * @wrong_if: number of wrong source interface hits
 111  * @lastuse: time of last use of the group (traffic or update)
 112  * @ttls: OIF TTL threshold array
 113  * @list: global entry list
 114  * @rcu: used for entry destruction
 115  */
 116 struct mfc_cache {
 117         struct rhlist_head mnode;
 118         union {
 119                 struct {
 120                         __be32 mfc_mcastgrp;
 121                         __be32 mfc_origin;
 122                 };
 123                 struct mfc_cache_cmp_arg cmparg;
 124         };
 125         vifi_t mfc_parent;
 126         int mfc_flags;
 127
 128         union {
 129                 struct {
 130                         unsigned long expires;
 131                         struct sk_buff_head unresolved;
 132                 } unres;
 133                 struct {
 134                         unsigned long last_assert;
 135                         int minvif;
 136                         int maxvif;
 137                         unsigned long bytes;
 138                         unsigned long pkt;
 139                         unsigned long wrong_if;
 140                         unsigned long lastuse;
 141                         unsigned char ttls[MAXVIFS];
 142                 } res;
 143         } mfc_un;
 144         struct list_head list;
 145         struct rcu_head rcu;
 146 };
 147
 148 struct rtmsg;
 149 int ipmr_get_route(struct net *net, struct sk_buff *skb,
 150                    __be32 saddr, __be32 daddr,
 151                    struct rtmsg *rtm, u32 portid);
 152 #endif