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 */
14 struct fib6_info;
15 struct fib6_nh;
16 struct fib6_config;
17 struct fib6_result;
18 
19 /* This is ugly, ideally these symbols should be built
20  * into the core kernel.
21  */
22 struct 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 	int (*xfrm6_rcv_encap)(struct sk_buff *skb, int nexthdr, __be32 spi,
64 			       int encap_type);
65 #endif
66 	struct neigh_table *nd_tbl;
67 
68 	int (*ipv6_fragment)(struct net *net, struct sock *sk, struct sk_buff *skb,
69 			     int (*output)(struct net *, struct sock *, struct sk_buff *));
70 	struct net_device *(*ipv6_dev_find)(struct net *net, const struct in6_addr *addr,
71 					    struct net_device *dev);
72 };
73 extern const struct ipv6_stub *ipv6_stub __read_mostly;
74 
75 /* A stub used by bpf helpers. Similarly ugly as ipv6_stub */
76 struct ipv6_bpf_stub {
77 	int (*inet6_bind)(struct sock *sk, struct sockaddr *uaddr, int addr_len,
78 			  u32 flags);
79 	struct sock *(*udp6_lib_lookup)(struct net *net,
80 				     const struct in6_addr *saddr, __be16 sport,
81 				     const struct in6_addr *daddr, __be16 dport,
82 				     int dif, int sdif, struct udp_table *tbl,
83 				     struct sk_buff *skb);
84 	int (*ipv6_setsockopt)(struct sock *sk, int level, int optname,
85 			       sockptr_t optval, unsigned int optlen);
86 	int (*ipv6_getsockopt)(struct sock *sk, int level, int optname,
87 			       sockptr_t optval, sockptr_t optlen);
88 };
89 extern const struct ipv6_bpf_stub *ipv6_bpf_stub __read_mostly;
90 
91 #endif
92