1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _IPV6_STUBS_H
3#define _IPV6_STUBS_H
4
5#include <linux/in6.h>
6#include <linux/netdevice.h>
7#include <linux/skbuff.h>
8#include <net/dst.h>
9#include <net/flow.h>
10#include <net/neighbour.h>
11#include <net/sock.h>
12
13/* structs from net/ip6_fib.h */
14struct fib6_info;
15struct fib6_nh;
16struct fib6_config;
17struct fib6_result;
18
19/* This is ugly, ideally these symbols should be built
20 * into the core kernel.
21 */
22struct ipv6_stub {
23	int (*ipv6_sock_mc_join)(struct sock *sk, int ifindex,
24				 const struct in6_addr *addr);
25	int (*ipv6_sock_mc_drop)(struct sock *sk, int ifindex,
26				 const struct in6_addr *addr);
27	struct dst_entry *(*ipv6_dst_lookup_flow)(struct net *net,
28						  const struct sock *sk,
29						  struct flowi6 *fl6,
30						  const struct in6_addr *final_dst);
31	int (*ipv6_route_input)(struct sk_buff *skb);
32
33	struct fib6_table *(*fib6_get_table)(struct net *net, u32 id);
34	int (*fib6_lookup)(struct net *net, int oif, struct flowi6 *fl6,
35			   struct fib6_result *res, int flags);
36	int (*fib6_table_lookup)(struct net *net, struct fib6_table *table,
37				 int oif, struct flowi6 *fl6,
38				 struct fib6_result *res, int flags);
39	void (*fib6_select_path)(const struct net *net, struct fib6_result *res,
40				 struct flowi6 *fl6, int oif, bool oif_match,
41				 const struct sk_buff *skb, int strict);
42	u32 (*ip6_mtu_from_fib6)(const struct fib6_result *res,
43				 const struct in6_addr *daddr,
44				 const struct in6_addr *saddr);
45
46	int (*fib6_nh_init)(struct net *net, struct fib6_nh *fib6_nh,
47			    struct fib6_config *cfg, gfp_t gfp_flags,
48			    struct netlink_ext_ack *extack);
49	void (*fib6_nh_release)(struct fib6_nh *fib6_nh);
50	void (*fib6_nh_release_dsts)(struct fib6_nh *fib6_nh);
51	void (*fib6_update_sernum)(struct net *net, struct fib6_info *rt);
52	int (*ip6_del_rt)(struct net *net, struct fib6_info *rt, bool skip_notify);
53	void (*fib6_rt_update)(struct net *net, struct fib6_info *rt,
54			       struct nl_info *info);
55
56	void (*udpv6_encap_enable)(void);
57	void (*ndisc_send_na)(struct net_device *dev, const struct in6_addr *daddr,
58			      const struct in6_addr *solicited_addr,
59			      bool router, bool solicited, bool override, bool inc_opt);
60#if IS_ENABLED(CONFIG_XFRM)
61	void (*xfrm6_local_rxpmtu)(struct sk_buff *skb, u32 mtu);
62	int (*xfrm6_udp_encap_rcv)(struct sock *sk, struct sk_buff *skb);
63	struct sk_buff *(*xfrm6_gro_udp_encap_rcv)(struct sock *sk,
64						   struct list_head *head,
65						   struct sk_buff *skb);
66	int (*xfrm6_rcv_encap)(struct sk_buff *skb, int nexthdr, __be32 spi,
67			       int encap_type);
68#endif
69	struct neigh_table *nd_tbl;
70
71	int (*ipv6_fragment)(struct net *net, struct sock *sk, struct sk_buff *skb,
72			     int (*output)(struct net *, struct sock *, struct sk_buff *));
73	struct net_device *(*ipv6_dev_find)(struct net *net, const struct in6_addr *addr,
74					    struct net_device *dev);
75};
76extern const struct ipv6_stub *ipv6_stub __read_mostly;
77
78/* A stub used by bpf helpers. Similarly ugly as ipv6_stub */
79struct ipv6_bpf_stub {
80	int (*inet6_bind)(struct sock *sk, struct sockaddr *uaddr, int addr_len,
81			  u32 flags);
82	struct sock *(*udp6_lib_lookup)(struct net *net,
83				     const struct in6_addr *saddr, __be16 sport,
84				     const struct in6_addr *daddr, __be16 dport,
85				     int dif, int sdif, struct udp_table *tbl,
86				     struct sk_buff *skb);
87	int (*ipv6_setsockopt)(struct sock *sk, int level, int optname,
88			       sockptr_t optval, unsigned int optlen);
89	int (*ipv6_getsockopt)(struct sock *sk, int level, int optname,
90			       sockptr_t optval, sockptr_t optlen);
91	int (*ipv6_dev_get_saddr)(struct net *net,
92				  const struct net_device *dst_dev,
93				  const struct in6_addr *daddr,
94				  unsigned int prefs,
95				  struct in6_addr *saddr);
96};
97extern const struct ipv6_bpf_stub *ipv6_bpf_stub __read_mostly;
98
99#endif
100