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
 15static inline int ip6_mroute_opt(int opt)
 16{
 17	return (opt >= MRT6_BASE) && (opt <= MRT6_MAX);
 18}
 19#else
 20static inline int ip6_mroute_opt(int opt)
 21{
 22	return 0;
 23}
 24#endif
 25
 26struct sock;
 27
 28#ifdef CONFIG_IPV6_MROUTE
 29extern int ip6_mroute_setsockopt(struct sock *, int, sockptr_t, unsigned int);
 30extern int ip6_mroute_getsockopt(struct sock *, int, sockptr_t, sockptr_t);
 31extern int ip6_mr_input(struct sk_buff *skb);
 32extern int ip6mr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg);
 33extern int ip6_mr_init(void);
 34extern int ip6_mr_output(struct net *net, struct sock *sk, struct sk_buff *skb);
 35extern void ip6_mr_cleanup(void);
 36int ip6mr_ioctl(struct sock *sk, int cmd, void *arg);
 37#else
 38static inline int ip6_mroute_setsockopt(struct sock *sock, int optname,
 39		sockptr_t optval, unsigned int optlen)
 40{
 41	return -ENOPROTOOPT;
 42}
 43
 44static inline
 45int ip6_mroute_getsockopt(struct sock *sock,
 46			  int optname, sockptr_t optval, sockptr_t optlen)
 47{
 48	return -ENOPROTOOPT;
 49}
 50
 51static inline
 52int ip6mr_ioctl(struct sock *sk, int cmd, void *arg)
 53{
 54	return -ENOIOCTLCMD;
 55}
 56
 57static inline int ip6_mr_init(void)
 58{
 59	return 0;
 60}
 61
 62static inline int
 63ip6_mr_output(struct net *net, struct sock *sk, struct sk_buff *skb)
 64{
 65	return ip6_output(net, sk, skb);
 66}
 67
 68static inline void ip6_mr_cleanup(void)
 69{
 70	return;
 71}
 72#endif
 73
 74#ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES
 75bool ip6mr_rule_default(const struct fib_rule *rule);
 76#else
 77static inline bool ip6mr_rule_default(const struct fib_rule *rule)
 78{
 79	return true;
 80}
 81#endif
 82
 83#define VIFF_STATIC 0x8000
 84
 85struct mfc6_cache_cmp_arg {
 86	struct in6_addr mf6c_mcastgrp;
 87	struct in6_addr mf6c_origin;
 88};
 89
 90struct mfc6_cache {
 91	struct mr_mfc _c;
 92	union {
 93		struct {
 94			struct in6_addr mf6c_mcastgrp;
 95			struct in6_addr mf6c_origin;
 96		};
 97		struct mfc6_cache_cmp_arg cmparg;
 98	};
 99};
100
101#define MFC_ASSERT_THRESH (3*HZ)		/* Maximal freq. of asserts */
102
103struct rtmsg;
104extern int ip6mr_get_route(struct net *net, struct sk_buff *skb,
105			   struct rtmsg *rtm, u32 portid);
106
107#ifdef CONFIG_IPV6_MROUTE
108bool mroute6_is_socket(struct net *net, struct sk_buff *skb);
109extern int ip6mr_sk_done(struct sock *sk);
110static inline int ip6mr_sk_ioctl(struct sock *sk, unsigned int cmd,
111				 void __user *arg)
112{
113	switch (cmd) {
114	/* These userspace buffers will be consumed by ip6mr_ioctl() */
115	case SIOCGETMIFCNT_IN6: {
116		struct sioc_mif_req6 buffer;
117
118		return sock_ioctl_inout(sk, cmd, arg, &buffer,
119					sizeof(buffer));
120		}
121	case SIOCGETSGCNT_IN6: {
122		struct sioc_sg_req6 buffer;
123
124		return sock_ioctl_inout(sk, cmd, arg, &buffer,
125					sizeof(buffer));
126		}
127	}
128
129	return 1;
130}
131#else
132static inline bool mroute6_is_socket(struct net *net, struct sk_buff *skb)
133{
134	return false;
135}
136static inline int ip6mr_sk_done(struct sock *sk)
137{
138	return 0;
139}
140
141static inline int ip6mr_sk_ioctl(struct sock *sk, unsigned int cmd,
142				 void __user *arg)
143{
144	return 1;
145}
146#endif
147#endif