allowedips.h (1874B)
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 13struct wg_peer; 14 15struct 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 29struct 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 35void wg_allowedips_init(struct allowedips *table); 36void wg_allowedips_free(struct allowedips *table, struct mutex *mutex); 37int wg_allowedips_insert_v4(struct allowedips *table, const struct in_addr *ip, 38 u8 cidr, struct wg_peer *peer, struct mutex *lock); 39int wg_allowedips_insert_v6(struct allowedips *table, const struct in6_addr *ip, 40 u8 cidr, struct wg_peer *peer, struct mutex *lock); 41void 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))) */ 44int wg_allowedips_read_node(struct allowedips_node *node, u8 ip[16], u8 *cidr); 45 46/* These return a strong reference to a peer: */ 47struct wg_peer *wg_allowedips_lookup_dst(struct allowedips *table, 48 struct sk_buff *skb); 49struct wg_peer *wg_allowedips_lookup_src(struct allowedips *table, 50 struct sk_buff *skb); 51 52#ifdef DEBUG 53bool wg_allowedips_selftest(void); 54#endif 55 56int wg_allowedips_slab_init(void); 57void wg_allowedips_slab_uninit(void); 58 59#endif /* _WG_ALLOWEDIPS_H */