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 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 }; 76 extern const struct ipv6_stub *ipv6_stub __read_mostly; 77 78 /* A stub used by bpf helpers. Similarly ugly as ipv6_stub */ 79 struct 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 }; 97 extern const struct ipv6_bpf_stub *ipv6_bpf_stub __read_mostly; 98 99 #endif 100