| 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 | */ |
| 23 | struct 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(error: -EAFNOSUPPORT); |
| 34 | |
| 35 | bind = kzalloc(sizeof(*bind), GFP_ATOMIC); |
| 36 | if (unlikely(!bind)) |
| 37 | return ERR_PTR(error: -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 | */ |
| 49 | void 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 | } |
| 56 |