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#include <net/ipv6.h>
 13
 14/* structs from net/ip6_fib.h */
 15struct fib6_info;
 16struct fib6_nh;
 17struct fib6_config;
 18struct fib6_result;
 19
 20/* This is ugly, ideally these symbols should be built
 21 * into the core kernel.
 22 */
 23struct ipv6_stub {
 24	int (*ipv6_sock_mc_join)(struct sock *sk, int ifindex,
 25				 const struct in6_addr *addr);
 26	int (*ipv6_sock_mc_drop)(struct sock *sk, int ifindex,
 27				 const struct in6_addr *addr);
 28	struct dst_entry *(*ipv6_dst_lookup_flow)(struct net *net,
 29						  const struct sock *sk,
 30						  struct flowi6 *fl6,
 31						  const struct in6_addr *final_dst);
 32	int (*ipv6_route_input)(struct sk_buff *skb);
 33
 34	struct fib6_table *(*fib6_get_table)(struct net *net, u32 id);
 35	int (*fib6_lookup)(struct net *net, int oif, struct flowi6 *fl6,
 36			   struct fib6_result *res, int flags);
 37	int (*fib6_table_lookup)(struct net *net, struct fib6_table *table,
 38				 int oif, struct flowi6 *fl6,
 39				 struct fib6_result *res, int flags);
 40	void (*fib6_select_path)(const struct net *net, struct fib6_result *res,
 41				 struct flowi6 *fl6, int oif, bool oif_match,
 42				 const struct sk_buff *skb, int strict);
 43	u32 (*ip6_mtu_from_fib6)(const struct fib6_result *res,
 44				 const struct in6_addr *daddr,
 45				 const struct in6_addr *saddr);
 46
 47	int (*fib6_nh_init)(struct net *net, struct fib6_nh *fib6_nh,
 48			    struct fib6_config *cfg, gfp_t gfp_flags,
 49			    struct netlink_ext_ack *extack);
 50	void (*fib6_nh_release)(struct fib6_nh *fib6_nh);
 51	void (*fib6_nh_release_dsts)(struct fib6_nh *fib6_nh);
 52	void (*fib6_update_sernum)(struct net *net, struct fib6_info *rt);
 53	int (*ip6_del_rt)(struct net *net, struct fib6_info *rt, bool skip_notify);
 54	void (*fib6_rt_update)(struct net *net, struct fib6_info *rt,
 55			       struct nl_info *info);
 56
 57	void (*udpv6_encap_enable)(void);
 58	void (*ndisc_send_na)(struct net_device *dev, const struct in6_addr *daddr,
 59			      const struct in6_addr *solicited_addr,
 60			      bool router, bool solicited, bool override, bool inc_opt);
 61#if IS_ENABLED(CONFIG_XFRM)
 62	void (*xfrm6_local_rxpmtu)(struct sk_buff *skb, u32 mtu);
 63	int (*xfrm6_udp_encap_rcv)(struct sock *sk, struct sk_buff *skb);
 64	struct sk_buff *(*xfrm6_gro_udp_encap_rcv)(struct sock *sk,
 65						   struct list_head *head,
 66						   struct sk_buff *skb);
 67	int (*xfrm6_rcv_encap)(struct sk_buff *skb, int nexthdr, __be32 spi,
 68			       int encap_type);
 69#endif
 70	struct neigh_table *nd_tbl;
 71
 72	int (*ipv6_fragment)(struct net *net, struct sock *sk, struct sk_buff *skb,
 73			     int (*output)(struct net *, struct sock *, struct sk_buff *));
 74	struct net_device *(*ipv6_dev_find)(struct net *net, const struct in6_addr *addr,
 75					    struct net_device *dev);
 76	int (*ip6_xmit)(const struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6,
 77			__u32 mark, struct ipv6_txoptions *opt, int tclass, u32 priority);
 78};
 79extern const struct ipv6_stub *ipv6_stub __read_mostly;
 80
 81/* A stub used by bpf helpers. Similarly ugly as ipv6_stub */
 82struct ipv6_bpf_stub {
 83	int (*inet6_bind)(struct sock *sk, struct sockaddr *uaddr, int addr_len,
 84			  u32 flags);
 85	struct sock *(*udp6_lib_lookup)(const struct net *net,
 86				     const struct in6_addr *saddr, __be16 sport,
 87				     const struct in6_addr *daddr, __be16 dport,
 88				     int dif, int sdif, struct udp_table *tbl,
 89				     struct sk_buff *skb);
 90	int (*ipv6_setsockopt)(struct sock *sk, int level, int optname,
 91			       sockptr_t optval, unsigned int optlen);
 92	int (*ipv6_getsockopt)(struct sock *sk, int level, int optname,
 93			       sockptr_t optval, sockptr_t optlen);
 94	int (*ipv6_dev_get_saddr)(struct net *net,
 95				  const struct net_device *dst_dev,
 96				  const struct in6_addr *daddr,
 97				  unsigned int prefs,
 98				  struct in6_addr *saddr);
 99};
100extern const struct ipv6_bpf_stub *ipv6_bpf_stub __read_mostly;
101
102#endif