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/* SPDX-License-Identifier: GPL-2.0-only */
/* OpenVPN data channel offload
*
* Copyright (C) 2020-2025 OpenVPN, Inc.
*
* Author: James Yonan <james@openvpn.net>
* Antonio Quartulli <antonio@openvpn.net>
*/
#ifndef _NET_OVPN_OVPNPEER_H_
#define _NET_OVPN_OVPNPEER_H_
#include <net/dst_cache.h>
#include "socket.h"
/**
* struct ovpn_peer - the main remote peer object
* @ovpn: main openvpn instance this peer belongs to
* @dev_tracker: reference tracker for associated dev
* @id: unique identifier
* @vpn_addrs: IP addresses assigned over the tunnel
* @vpn_addrs.ipv4: IPv4 assigned to peer on the tunnel
* @vpn_addrs.ipv6: IPv6 assigned to peer on the tunnel
* @sock: the socket being used to talk to this peer
* @dst_cache: cache for dst_entry used to send to peer
* @bind: remote peer binding
* @delete_reason: why peer was deleted (i.e. timeout, transport error, ..)
* @lock: protects binding to peer (bind)
* @refcount: reference counter
* @rcu: used to free peer in an RCU safe way
* @release_entry: entry for the socket release list
*/
struct ovpn_peer {
struct ovpn_priv *ovpn;
netdevice_tracker dev_tracker;
u32 id;
struct {
struct in_addr ipv4;
struct in6_addr ipv6;
} vpn_addrs;
struct ovpn_socket __rcu *sock;
struct dst_cache dst_cache;
struct ovpn_bind __rcu *bind;
enum ovpn_del_peer_reason delete_reason;
spinlock_t lock; /* protects bind */
struct kref refcount;
struct rcu_head rcu;
struct llist_node release_entry;
};
/**
* ovpn_peer_hold - increase reference counter
* @peer: the peer whose counter should be increased
*
* Return: true if the counter was increased or false if it was zero already
*/
static inline bool ovpn_peer_hold(struct ovpn_peer *peer)
{
return kref_get_unless_zero(&peer->refcount);
}
void ovpn_peer_release_kref(struct kref *kref);
/**
* ovpn_peer_put - decrease reference counter
* @peer: the peer whose counter should be decreased
*/
static inline void ovpn_peer_put(struct ovpn_peer *peer)
{
kref_put(&peer->refcount, ovpn_peer_release_kref);
}
struct ovpn_peer *ovpn_peer_new(struct ovpn_priv *ovpn, u32 id);
int ovpn_peer_add(struct ovpn_priv *ovpn, struct ovpn_peer *peer);
int ovpn_peer_del(struct ovpn_peer *peer, enum ovpn_del_peer_reason reason);
void ovpn_peer_release_p2p(struct ovpn_priv *ovpn, struct sock *sk,
enum ovpn_del_peer_reason reason);
struct ovpn_peer *ovpn_peer_get_by_transp_addr(struct ovpn_priv *ovpn,
struct sk_buff *skb);
struct ovpn_peer *ovpn_peer_get_by_id(struct ovpn_priv *ovpn, u32 peer_id);
struct ovpn_peer *ovpn_peer_get_by_dst(struct ovpn_priv *ovpn,
struct sk_buff *skb);
#endif /* _NET_OVPN_OVPNPEER_H_ */
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