/* SPDX-License-Identifier: GPL-2.0 */ /* * Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. */ #ifndef _WG_ALLOWEDIPS_H #define _WG_ALLOWEDIPS_H #include <linux/mutex.h> #include <linux/ip.h> #include <linux/ipv6.h> struct wg_peer; struct allowedips_node { struct wg_peer __rcu *peer; struct allowedips_node __rcu *bit[2]; /* While it may seem scandalous that we waste space for v4, * we're alloc'ing to the nearest power of 2 anyway, so this * doesn't actually make a difference. */ u8 bits[16] __aligned(__alignof(u64)); u8 cidr, bit_at_a, bit_at_b, bitlen; /* Keep rarely used list at bottom to be beyond cache line. */ union { struct list_head peer_list; struct rcu_head rcu; }; }; struct allowedips { struct allowedips_node __rcu *root4; struct allowedips_node __rcu *root6; u64 seq; }; void wg_allowedips_init(struct allowedips *table); void wg_allowedips_free(struct allowedips *table, struct mutex *mutex); int wg_allowedips_insert_v4(struct allowedips *table, const struct in_addr *ip, u8 cidr, struct wg_peer *peer, struct mutex *lock); int wg_allowedips_insert_v6(struct allowedips *table, const struct in6_addr *ip, u8 cidr, struct wg_peer *peer, struct mutex *lock); void wg_allowedips_remove_by_peer(struct allowedips *table, struct wg_peer *peer, struct mutex *lock); /* The ip input pointer should be __aligned(__alignof(u64))) */ int wg_allowedips_read_node(struct allowedips_node *node, u8 ip[16], u8 *cidr); /* These return a strong reference to a peer: */ struct wg_peer *wg_allowedips_lookup_dst(struct allowedips *table, struct sk_buff *skb); struct wg_peer *wg_allowedips_lookup_src(struct allowedips *table, struct sk_buff *skb); #ifdef DEBUG bool wg_allowedips_selftest(void); #endif #endif /* _WG_ALLOWEDIPS_H */