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3ecfd9349f
OpenVPN supports configuring a periodic keepalive packet. message to allow the remote endpoint detect link failures. This change implements the keepalive sending and timer expiring logic. Signed-off-by: Antonio Quartulli <antonio@openvpn.net> Link: https://patch.msgid.link/20250415-b4-ovpn-v26-16-577f6097b964@openvpn.net Reviewed-by: Sabrina Dubroca <sd@queasysnail.net> Tested-by: Oleksandr Natalenko <oleksandr@natalenko.name> Signed-off-by: Paolo Abeni <pabeni@redhat.com>
55 lines
1.8 KiB
C
55 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/* OpenVPN data channel offload
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*
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* Copyright (C) 2019-2025 OpenVPN, Inc.
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*
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* Author: James Yonan <james@openvpn.net>
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* Antonio Quartulli <antonio@openvpn.net>
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*/
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#ifndef _NET_OVPN_OVPNSTRUCT_H_
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#define _NET_OVPN_OVPNSTRUCT_H_
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#include <linux/workqueue.h>
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#include <net/gro_cells.h>
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#include <uapi/linux/if_link.h>
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#include <uapi/linux/ovpn.h>
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/**
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* struct ovpn_peer_collection - container of peers for MultiPeer mode
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* @by_id: table of peers index by ID
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* @by_vpn_addr4: table of peers indexed by VPN IPv4 address (items can be
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* rehashed on the fly due to peer IP change)
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* @by_vpn_addr6: table of peers indexed by VPN IPv6 address (items can be
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* rehashed on the fly due to peer IP change)
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* @by_transp_addr: table of peers indexed by transport address (items can be
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* rehashed on the fly due to peer IP change)
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*/
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struct ovpn_peer_collection {
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DECLARE_HASHTABLE(by_id, 12);
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struct hlist_nulls_head by_vpn_addr4[1 << 12];
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struct hlist_nulls_head by_vpn_addr6[1 << 12];
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struct hlist_nulls_head by_transp_addr[1 << 12];
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};
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/**
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* struct ovpn_priv - per ovpn interface state
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* @dev: the actual netdev representing the tunnel
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* @mode: device operation mode (i.e. p2p, mp, ..)
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* @lock: protect this object
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* @peers: data structures holding multi-peer references
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* @peer: in P2P mode, this is the only remote peer
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* @gro_cells: pointer to the Generic Receive Offload cell
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* @keepalive_work: struct used to schedule keepalive periodic job
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*/
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struct ovpn_priv {
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struct net_device *dev;
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enum ovpn_mode mode;
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spinlock_t lock; /* protect writing to the ovpn_priv object */
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struct ovpn_peer_collection *peers;
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struct ovpn_peer __rcu *peer;
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struct gro_cells gro_cells;
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struct delayed_work keepalive_work;
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};
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#endif /* _NET_OVPN_OVPNSTRUCT_H_ */
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