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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>
34 lines
1 KiB
C
34 lines
1 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_OVPN_H_
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#define _NET_OVPN_OVPN_H_
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/* DATA_V2 header size with AEAD encryption */
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#define OVPN_HEAD_ROOM (OVPN_OPCODE_SIZE + OVPN_NONCE_WIRE_SIZE + \
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16 /* AEAD TAG length */ + \
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max(sizeof(struct udphdr), sizeof(struct tcphdr)) +\
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max(sizeof(struct ipv6hdr), sizeof(struct iphdr)))
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/* max padding required by encryption */
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#define OVPN_MAX_PADDING 16
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#define OVPN_KEEPALIVE_SIZE 16
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extern const unsigned char ovpn_keepalive_message[OVPN_KEEPALIVE_SIZE];
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netdev_tx_t ovpn_net_xmit(struct sk_buff *skb, struct net_device *dev);
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void ovpn_recv(struct ovpn_peer *peer, struct sk_buff *skb);
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void ovpn_xmit_special(struct ovpn_peer *peer, const void *data,
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const unsigned int len);
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void ovpn_encrypt_post(void *data, int ret);
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void ovpn_decrypt_post(void *data, int ret);
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#endif /* _NET_OVPN_OVPN_H_ */
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