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/* SPDX-License-Identifier: GPL-2.0-only */
/* OpenVPN data channel offload
*
* Copyright (C) 2019-2025 OpenVPN, Inc.
*
* Author: James Yonan <james@openvpn.net>
* Antonio Quartulli <antonio@openvpn.net>
*/
#ifndef _NET_OVPN_OVPN_H_
#define _NET_OVPN_OVPN_H_
/* DATA_V2 header size with AEAD encryption */
#define OVPN_HEAD_ROOM (OVPN_OPCODE_SIZE + OVPN_NONCE_WIRE_SIZE + \
16 /* AEAD TAG length */ + \
max(sizeof(struct udphdr), sizeof(struct tcphdr)) +\
max(sizeof(struct ipv6hdr), sizeof(struct iphdr)))
/* max padding required by encryption */
#define OVPN_MAX_PADDING 16
#define OVPN_KEEPALIVE_SIZE 16
extern const unsigned char ovpn_keepalive_message[OVPN_KEEPALIVE_SIZE];
netdev_tx_t ovpn_net_xmit(struct sk_buff *skb, struct net_device *dev);
void ovpn_recv(struct ovpn_peer *peer, struct sk_buff *skb);
void ovpn_xmit_special(struct ovpn_peer *peer, const void *data,
const unsigned int len);
void ovpn_encrypt_post(void *data, int ret);
void ovpn_decrypt_post(void *data, int ret);
#endif /* _NET_OVPN_OVPN_H_ */
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