Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1// SPDX-License-Identifier: GPL-2.0
2/* OpenVPN data channel offload
3 *
4 * Copyright (C) 2012-2025 OpenVPN, Inc.
5 *
6 * Author: James Yonan <james@openvpn.net>
7 * Antonio Quartulli <antonio@openvpn.net>
8 */
9
10#include <linux/netdevice.h>
11#include <linux/socket.h>
12
13#include "ovpnpriv.h"
14#include "bind.h"
15#include "peer.h"
16
17/**
18 * ovpn_bind_from_sockaddr - retrieve binding matching sockaddr
19 * @ss: the sockaddr to match
20 *
21 * Return: the bind matching the passed sockaddr if found, NULL otherwise
22 */
23struct ovpn_bind *ovpn_bind_from_sockaddr(const struct sockaddr_storage *ss)
24{
25 struct ovpn_bind *bind;
26 size_t sa_len;
27
28 if (ss->ss_family == AF_INET)
29 sa_len = sizeof(struct sockaddr_in);
30 else if (ss->ss_family == AF_INET6)
31 sa_len = sizeof(struct sockaddr_in6);
32 else
33 return ERR_PTR(-EAFNOSUPPORT);
34
35 bind = kzalloc(sizeof(*bind), GFP_ATOMIC);
36 if (unlikely(!bind))
37 return ERR_PTR(-ENOMEM);
38
39 memcpy(&bind->remote, ss, sa_len);
40
41 return bind;
42}
43
44/**
45 * ovpn_bind_reset - assign new binding to peer
46 * @peer: the peer whose binding has to be replaced
47 * @new: the new bind to assign
48 */
49void ovpn_bind_reset(struct ovpn_peer *peer, struct ovpn_bind *new)
50{
51 lockdep_assert_held(&peer->lock);
52
53 kfree_rcu(rcu_replace_pointer(peer->bind, new,
54 lockdep_is_held(&peer->lock)), rcu);
55}