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 */ 15 struct fib6_info; 16 struct fib6_nh; 17 struct fib6_config; 18 struct fib6_result; 19 20 /* This is ugly, ideally these symbols should be built 21 * into the core kernel. 22 */ 23 struct 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 }; 79 extern const struct ipv6_stub *ipv6_stub __read_mostly; 80 81 /* A stub used by bpf helpers. Similarly ugly as ipv6_stub */ 82 struct 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 }; 100 extern const struct ipv6_bpf_stub *ipv6_bpf_stub __read_mostly; 101 102 #endif 103