include/linux/mroute6.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __LINUX_MROUTE6_H
   3 #define __LINUX_MROUTE6_H
   4
   5
   6 #include <linux/pim.h>
   7 #include <linux/skbuff.h>       /* for struct sk_buff_head */
   8 #include <net/net_namespace.h>
   9 #include <uapi/linux/mroute6.h>
  10
  11 #ifdef CONFIG_IPV6_MROUTE
  12 static inline int ip6_mroute_opt(int opt)
  13 {
  14         return (opt >= MRT6_BASE) && (opt <= MRT6_MAX);
  15 }
  16 #else
  17 static inline int ip6_mroute_opt(int opt)
  18 {
  19         return 0;
  20 }
  21 #endif
  22
  23 struct sock;
  24
  25 #ifdef CONFIG_IPV6_MROUTE
  26 extern int ip6_mroute_setsockopt(struct sock *, int, char __user *, unsigned int);
  27 extern int ip6_mroute_getsockopt(struct sock *, int, char __user *, int __user *);
  28 extern int ip6_mr_input(struct sk_buff *skb);
  29 extern int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg);
  30 extern int ip6mr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg);
  31 extern int ip6_mr_init(void);
  32 extern void ip6_mr_cleanup(void);
  33 #else
  34 static inline
  35 int ip6_mroute_setsockopt(struct sock *sock,
  36                           int optname, char __user *optval, unsigned int optlen)
  37 {
  38         return -ENOPROTOOPT;
  39 }
  40
  41 static inline
  42 int ip6_mroute_getsockopt(struct sock *sock,
  43                           int optname, char __user *optval, int __user *optlen)
  44 {
  45         return -ENOPROTOOPT;
  46 }
  47
  48 static inline
  49 int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg)
  50 {
  51         return -ENOIOCTLCMD;
  52 }
  53
  54 static inline int ip6_mr_init(void)
  55 {
  56         return 0;
  57 }
  58
  59 static inline void ip6_mr_cleanup(void)
  60 {
  61         return;
  62 }
  63 #endif
  64
  65 struct mif_device {
  66         struct net_device       *dev;                   /* Device we are using */
  67         unsigned long   bytes_in,bytes_out;
  68         unsigned long   pkt_in,pkt_out;         /* Statistics                   */
  69         unsigned long   rate_limit;             /* Traffic shaping (NI)         */
  70         unsigned char   threshold;              /* TTL threshold                */
  71         unsigned short  flags;                  /* Control flags                */
  72         int             link;                   /* Physical interface index     */
  73 };
  74
  75 #define VIFF_STATIC 0x8000
  76
  77 struct mfc6_cache {
  78         struct list_head list;
  79         struct in6_addr mf6c_mcastgrp;                  /* Group the entry belongs to   */
  80         struct in6_addr mf6c_origin;                    /* Source of packet             */
  81         mifi_t mf6c_parent;                     /* Source interface             */
  82         int mfc_flags;                          /* Flags on line                */
  83
  84         union {
  85                 struct {
  86                         unsigned long expires;
  87                         struct sk_buff_head unresolved; /* Unresolved buffers           */
  88                 } unres;
  89                 struct {
  90                         unsigned long last_assert;
  91                         int minvif;
  92                         int maxvif;
  93                         unsigned long bytes;
  94                         unsigned long pkt;
  95                         unsigned long wrong_if;
  96                         unsigned long lastuse;
  97                         unsigned char ttls[MAXMIFS];    /* TTL thresholds               */
  98                 } res;
  99         } mfc_un;
 100 };
 101
 102 #define MFC_STATIC              1
 103 #define MFC_NOTIFY              2
 104
 105 #define MFC6_LINES              64
 106
 107 #define MFC6_HASH(a, g) (((__force u32)(a)->s6_addr32[0] ^ \
 108                           (__force u32)(a)->s6_addr32[1] ^ \
 109                           (__force u32)(a)->s6_addr32[2] ^ \
 110                           (__force u32)(a)->s6_addr32[3] ^ \
 111                           (__force u32)(g)->s6_addr32[0] ^ \
 112                           (__force u32)(g)->s6_addr32[1] ^ \
 113                           (__force u32)(g)->s6_addr32[2] ^ \
 114                           (__force u32)(g)->s6_addr32[3]) % MFC6_LINES)
 115
 116 #define MFC_ASSERT_THRESH (3*HZ)                /* Maximal freq. of asserts */
 117
 118 struct rtmsg;
 119 extern int ip6mr_get_route(struct net *net, struct sk_buff *skb,
 120                            struct rtmsg *rtm, u32 portid);
 121
 122 #ifdef CONFIG_IPV6_MROUTE
 123 extern struct sock *mroute6_socket(struct net *net, struct sk_buff *skb);
 124 extern int ip6mr_sk_done(struct sock *sk);
 125 #else
 126 static inline struct sock *mroute6_socket(struct net *net, struct sk_buff *skb)
 127 {
 128         return NULL;
 129 }
 130 static inline int ip6mr_sk_done(struct sock *sk)
 131 {
 132         return 0;
 133 }
 134 #endif
 135 #endif