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 20 void __init ovpn_tcp_init(void); 21 22 int ovpn_tcp_socket_attach(struct ovpn_socket *ovpn_sock, 23 struct ovpn_peer *peer); 24 void ovpn_tcp_socket_detach(struct ovpn_socket *ovpn_sock); 25 void 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 */ 33 void ovpn_tcp_send_skb(struct ovpn_peer *peer, struct sock *sk, 34 struct sk_buff *skb); 35 void ovpn_tcp_tx_work(struct work_struct *work); 36 37 #endif /* _NET_OVPN_TCP_H_ */ 38