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 void ip6_mr_cleanup(void);
35int ip6mr_ioctl(struct sock *sk, int cmd, void *arg);
36#else
37static inline int ip6_mroute_setsockopt(struct sock *sock, int optname,
38		sockptr_t optval, unsigned int optlen)
39{
40	return -ENOPROTOOPT;
41}
42
43static inline
44int ip6_mroute_getsockopt(struct sock *sock,
45			  int optname, sockptr_t optval, sockptr_t optlen)
46{
47	return -ENOPROTOOPT;
48}
49
50static inline
51int ip6mr_ioctl(struct sock *sk, int cmd, void *arg)
52{
53	return -ENOIOCTLCMD;
54}
55
56static inline int ip6_mr_init(void)
57{
58	return 0;
59}
60
61static inline void ip6_mr_cleanup(void)
62{
63	return;
64}
65#endif
66
67#ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES
68bool ip6mr_rule_default(const struct fib_rule *rule);
69#else
70static inline bool ip6mr_rule_default(const struct fib_rule *rule)
71{
72	return true;
73}
74#endif
75
76#define VIFF_STATIC 0x8000
77
78struct mfc6_cache_cmp_arg {
79	struct in6_addr mf6c_mcastgrp;
80	struct in6_addr mf6c_origin;
81};
82
83struct 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
96struct rtmsg;
97extern int ip6mr_get_route(struct net *net, struct sk_buff *skb,
98			   struct rtmsg *rtm, u32 portid);
99
100#ifdef CONFIG_IPV6_MROUTE
101bool mroute6_is_socket(struct net *net, struct sk_buff *skb);
102extern int ip6mr_sk_done(struct sock *sk);
103static 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
125static inline bool mroute6_is_socket(struct net *net, struct sk_buff *skb)
126{
127	return false;
128}
129static inline int ip6mr_sk_done(struct sock *sk)
130{
131	return 0;
132}
133
134static inline int ip6mr_sk_ioctl(struct sock *sk, unsigned int cmd,
135				 void __user *arg)
136{
137	return 1;
138}
139#endif
140#endif
141