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