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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_H7#define _WG_ALLOWEDIPS_H8 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 DEBUG53bool wg_allowedips_selftest(void);54#endif55 56int wg_allowedips_slab_init(void);57void wg_allowedips_slab_uninit(void);58 59#endif /* _WG_ALLOWEDIPS_H */60