1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __LINUX_MROUTE_H
3 #define __LINUX_MROUTE_H
4
5 #include <linux/in.h>
6 #include <linux/pim.h>
7 #include <linux/rhashtable.h>
8 #include <net/sock.h>
9 #include <uapi/linux/mroute.h>
10
11 #ifdef CONFIG_IP_MROUTE
ip_mroute_opt(int opt)12 static inline int ip_mroute_opt(int opt)
13 {
14 return opt >= MRT_BASE && opt <= MRT_MAX;
15 }
16
17 int ip_mroute_setsockopt(struct sock *, int, char __user *, unsigned int);
18 int ip_mroute_getsockopt(struct sock *, int, char __user *, int __user *);
19 int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg);
20 int ipmr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg);
21 int ip_mr_init(void);
22 #else
ip_mroute_setsockopt(struct sock * sock,int optname,char __user * optval,unsigned int optlen)23 static inline int ip_mroute_setsockopt(struct sock *sock, int optname,
24 char __user *optval, unsigned int optlen)
25 {
26 return -ENOPROTOOPT;
27 }
28
ip_mroute_getsockopt(struct sock * sock,int optname,char __user * optval,int __user * optlen)29 static inline int ip_mroute_getsockopt(struct sock *sock, int optname,
30 char __user *optval, int __user *optlen)
31 {
32 return -ENOPROTOOPT;
33 }
34
ipmr_ioctl(struct sock * sk,int cmd,void __user * arg)35 static inline int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg)
36 {
37 return -ENOIOCTLCMD;
38 }
39
ip_mr_init(void)40 static inline int ip_mr_init(void)
41 {
42 return 0;
43 }
44
ip_mroute_opt(int opt)45 static inline int ip_mroute_opt(int opt)
46 {
47 return 0;
48 }
49 #endif
50
51 struct vif_device {
52 struct net_device *dev; /* Device we are using */
53 unsigned long bytes_in,bytes_out;
54 unsigned long pkt_in,pkt_out; /* Statistics */
55 unsigned long rate_limit; /* Traffic shaping (NI) */
56 unsigned char threshold; /* TTL threshold */
57 unsigned short flags; /* Control flags */
58 __be32 local,remote; /* Addresses(remote for tunnels)*/
59 int link; /* Physical interface index */
60 };
61
62 #define VIFF_STATIC 0x8000
63
64 #define VIF_EXISTS(_mrt, _idx) ((_mrt)->vif_table[_idx].dev != NULL)
65
66 struct mr_table {
67 struct list_head list;
68 possible_net_t net;
69 u32 id;
70 struct sock __rcu *mroute_sk;
71 struct timer_list ipmr_expire_timer;
72 struct list_head mfc_unres_queue;
73 struct vif_device vif_table[MAXVIFS];
74 struct rhltable mfc_hash;
75 struct list_head mfc_cache_list;
76 int maxvif;
77 atomic_t cache_resolve_queue_len;
78 bool mroute_do_assert;
79 bool mroute_do_pim;
80 int mroute_reg_vif_num;
81 };
82
83 /* mfc_flags:
84 * MFC_STATIC - the entry was added statically (not by a routing daemon)
85 */
86 enum {
87 MFC_STATIC = BIT(0),
88 };
89
90 struct mfc_cache_cmp_arg {
91 __be32 mfc_mcastgrp;
92 __be32 mfc_origin;
93 };
94
95 /**
96 * struct mfc_cache - multicast routing entries
97 * @mnode: rhashtable list
98 * @mfc_mcastgrp: destination multicast group address
99 * @mfc_origin: source address
100 * @cmparg: used for rhashtable comparisons
101 * @mfc_parent: source interface (iif)
102 * @mfc_flags: entry flags
103 * @expires: unresolved entry expire time
104 * @unresolved: unresolved cached skbs
105 * @last_assert: time of last assert
106 * @minvif: minimum VIF id
107 * @maxvif: maximum VIF id
108 * @bytes: bytes that have passed for this entry
109 * @pkt: packets that have passed for this entry
110 * @wrong_if: number of wrong source interface hits
111 * @lastuse: time of last use of the group (traffic or update)
112 * @ttls: OIF TTL threshold array
113 * @list: global entry list
114 * @rcu: used for entry destruction
115 */
116 struct mfc_cache {
117 struct rhlist_head mnode;
118 union {
119 struct {
120 __be32 mfc_mcastgrp;
121 __be32 mfc_origin;
122 };
123 struct mfc_cache_cmp_arg cmparg;
124 };
125 vifi_t mfc_parent;
126 int mfc_flags;
127
128 union {
129 struct {
130 unsigned long expires;
131 struct sk_buff_head unresolved;
132 } unres;
133 struct {
134 unsigned long last_assert;
135 int minvif;
136 int maxvif;
137 unsigned long bytes;
138 unsigned long pkt;
139 unsigned long wrong_if;
140 unsigned long lastuse;
141 unsigned char ttls[MAXVIFS];
142 } res;
143 } mfc_un;
144 struct list_head list;
145 struct rcu_head rcu;
146 };
147
148 struct rtmsg;
149 int ipmr_get_route(struct net *net, struct sk_buff *skb,
150 __be32 saddr, __be32 daddr,
151 struct rtmsg *rtm, u32 portid);
152 #endif
153