1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. 4 */ 5 6 #ifndef _WG_ALLOWEDIPS_H 7 #define _WG_ALLOWEDIPS_H 8 9 #include <linux/mutex.h> 10 #include <linux/ip.h> 11 #include <linux/ipv6.h> 12 13 struct wg_peer; 14 15 struct allowedips_node { 16 struct wg_peer __rcu *peer; 17 struct allowedips_node __rcu *bit[2]; 18 u8 cidr, bit_at_a, bit_at_b, bitlen; 19 u8 bits[16] __aligned(__alignof(u64)); 20 21 /* Keep rarely used members at bottom to be beyond cache line. */ 22 unsigned long parent_bit_packed; 23 union { 24 struct list_head peer_list; 25 struct rcu_head rcu; 26 }; 27 }; 28 29 struct allowedips { 30 struct allowedips_node __rcu *root4; 31 struct allowedips_node __rcu *root6; 32 u64 seq; 33 } __aligned(4); /* We pack the lower 2 bits of &root, but m68k only gives 16-bit alignment. */ 34 35 void wg_allowedips_init(struct allowedips *table); 36 void wg_allowedips_free(struct allowedips *table, struct mutex *mutex); 37 int wg_allowedips_insert_v4(struct allowedips *table, const struct in_addr *ip, 38 u8 cidr, struct wg_peer *peer, struct mutex *lock); 39 int wg_allowedips_insert_v6(struct allowedips *table, const struct in6_addr *ip, 40 u8 cidr, struct wg_peer *peer, struct mutex *lock); 41 void wg_allowedips_remove_by_peer(struct allowedips *table, 42 struct wg_peer *peer, struct mutex *lock); 43 /* The ip input pointer should be __aligned(__alignof(u64))) */ 44 int wg_allowedips_read_node(struct allowedips_node *node, u8 ip[16], u8 *cidr); 45 46 /* These return a strong reference to a peer: */ 47 struct wg_peer *wg_allowedips_lookup_dst(struct allowedips *table, 48 struct sk_buff *skb); 49 struct wg_peer *wg_allowedips_lookup_src(struct allowedips *table, 50 struct sk_buff *skb); 51 52 #ifdef DEBUG 53 bool wg_allowedips_selftest(void); 54 #endif 55 56 int wg_allowedips_slab_init(void); 57 void wg_allowedips_slab_uninit(void); 58 59 #endif /* _WG_ALLOWEDIPS_H */ 60