tcp.h

 1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*  OpenVPN data channel offload
 3 *
 4 *  Copyright (C) 2019-2025 OpenVPN, Inc.
 5 *
 6 *  Author:	Antonio Quartulli <antonio@openvpn.net>
 7 */
 8
 9#ifndef _NET_OVPN_TCP_H_
10#define _NET_OVPN_TCP_H_
11
12#include <linux/net.h>
13#include <linux/skbuff.h>
14#include <linux/types.h>
15
16#include "peer.h"
17#include "skb.h"
18#include "socket.h"
19
20void __init ovpn_tcp_init(void);
21
22int ovpn_tcp_socket_attach(struct ovpn_socket *ovpn_sock,
23			   struct ovpn_peer *peer);
24void ovpn_tcp_socket_detach(struct ovpn_socket *ovpn_sock);
25void ovpn_tcp_socket_wait_finish(struct ovpn_socket *sock);
26
27/* Prepare skb and enqueue it for sending to peer.
28 *
29 * Preparation consist in prepending the skb payload with its size.
30 * Required by the OpenVPN protocol in order to extract packets from
31 * the TCP stream on the receiver side.
32 */
33void ovpn_tcp_send_skb(struct ovpn_peer *peer, struct sock *sk,
34		       struct sk_buff *skb);
35void ovpn_tcp_tx_work(struct work_struct *work);
36
37#endif /* _NET_OVPN_TCP_H_ */