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 #include <linux/mroute_base.h>
  11 #include <linux/sockptr.h>
  12 #include <net/fib_rules.h>
  13
  14 #ifdef CONFIG_IPV6_MROUTE
  15 static inline int ip6_mroute_opt(int opt)
  16 {
  17         return (opt >= MRT6_BASE) && (opt <= MRT6_MAX);
  18 }
  19 #else
  20 static inline int ip6_mroute_opt(int opt)
  21 {
  22         return 0;
  23 }
  24 #endif
  25
  26 struct sock;
  27
  28 #ifdef CONFIG_IPV6_MROUTE
  29 extern int ip6_mroute_setsockopt(struct sock *, int, sockptr_t, unsigned int);
  30 extern int ip6_mroute_getsockopt(struct sock *, int, sockptr_t, sockptr_t);
  31 extern int ip6_mr_input(struct sk_buff *skb);
  32 extern int ip6mr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg);
  33 extern int ip6_mr_init(void);
  34 extern void ip6_mr_cleanup(void);
  35 int ip6mr_ioctl(struct sock *sk, int cmd, void *arg);
  36 #else
  37 static inline int ip6_mroute_setsockopt(struct sock *sock, int optname,
  38                 sockptr_t optval, unsigned int optlen)
  39 {
  40         return -ENOPROTOOPT;
  41 }
  42
  43 static inline
  44 int ip6_mroute_getsockopt(struct sock *sock,
  45                           int optname, sockptr_t optval, sockptr_t optlen)
  46 {
  47         return -ENOPROTOOPT;
  48 }
  49
  50 static inline
  51 int ip6mr_ioctl(struct sock *sk, int cmd, void *arg)
  52 {
  53         return -ENOIOCTLCMD;
  54 }
  55
  56 static inline int ip6_mr_init(void)
  57 {
  58         return 0;
  59 }
  60
  61 static inline void ip6_mr_cleanup(void)
  62 {
  63         return;
  64 }
  65 #endif
  66
  67 #ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES
  68 bool ip6mr_rule_default(const struct fib_rule *rule);
  69 #else
  70 static inline bool ip6mr_rule_default(const struct fib_rule *rule)
  71 {
  72         return true;
  73 }
  74 #endif
  75
  76 #define VIFF_STATIC 0x8000
  77
  78 struct mfc6_cache_cmp_arg {
  79         struct in6_addr mf6c_mcastgrp;
  80         struct in6_addr mf6c_origin;
  81 };
  82
  83 struct mfc6_cache {
  84         struct mr_mfc _c;
  85         union {
  86                 struct {
  87                         struct in6_addr mf6c_mcastgrp;
  88                         struct in6_addr mf6c_origin;
  89                 };
  90                 struct mfc6_cache_cmp_arg cmparg;
  91         };
  92 };
  93
  94 #define MFC_ASSERT_THRESH (3*HZ)                /* Maximal freq. of asserts */
  95
  96 struct rtmsg;
  97 extern int ip6mr_get_route(struct net *net, struct sk_buff *skb,
  98                            struct rtmsg *rtm, u32 portid);
  99
 100 #ifdef CONFIG_IPV6_MROUTE
 101 bool mroute6_is_socket(struct net *net, struct sk_buff *skb);
 102 extern int ip6mr_sk_done(struct sock *sk);
 103 static inline int ip6mr_sk_ioctl(struct sock *sk, unsigned int cmd,
 104                                  void __user *arg)
 105 {
 106         switch (cmd) {
 107         /* These userspace buffers will be consumed by ip6mr_ioctl() */
 108         case SIOCGETMIFCNT_IN6: {
 109                 struct sioc_mif_req6 buffer;
 110
 111                 return sock_ioctl_inout(sk, cmd, arg, &buffer,
 112                                         sizeof(buffer));
 113                 }
 114         case SIOCGETSGCNT_IN6: {
 115                 struct sioc_sg_req6 buffer;
 116
 117                 return sock_ioctl_inout(sk, cmd, arg, &buffer,
 118                                         sizeof(buffer));
 119                 }
 120         }
 121
 122         return 1;
 123 }
 124 #else
 125 static inline bool mroute6_is_socket(struct net *net, struct sk_buff *skb)
 126 {
 127         return false;
 128 }
 129 static inline int ip6mr_sk_done(struct sock *sk)
 130 {
 131         return 0;
 132 }
 133
 134 static inline int ip6mr_sk_ioctl(struct sock *sk, unsigned int cmd,
 135                                  void __user *arg)
 136 {
 137         return 1;
 138 }
 139 #endif
 140 #endif