1/*-
2 * Copyright (c) 2015 Patrick Kelsey
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD$
27 */
28
29#ifndef _TCP_FASTOPEN_H_
30#define _TCP_FASTOPEN_H_
31
32#ifdef _KERNEL
33
34#define	TCP_FASTOPEN_COOKIE_LEN	8	/* tied to SipHash24 64-bit output */
35
36VNET_DECLARE(unsigned int, tcp_fastopen_enabled);
37#define	V_tcp_fastopen_enabled	VNET(tcp_fastopen_enabled)
38
39void	tcp_fastopen_init(void);
40void	tcp_fastopen_destroy(void);
41unsigned int *tcp_fastopen_alloc_counter(void);
42void	tcp_fastopen_decrement_counter(unsigned int *counter);
43int	tcp_fastopen_check_cookie(struct in_conninfo *inc, uint8_t *cookie,
44	    unsigned int len, uint64_t *latest_cookie);
45#endif /* _KERNEL */
46
47#endif /* _TCP_FASTOPEN_H_ */
48