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(-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 */ 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