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[mirror_ubuntu-bionic-kernel.git] / 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