freebsd-dev/sys/netinet/tcp_fastopen.h
Patrick Kelsey 281a0fd4f9 Implementation of server-side TCP Fast Open (TFO) [RFC7413].
TFO is disabled by default in the kernel build.  See the top comment
in sys/netinet/tcp_fastopen.c for implementation particulars.

Reviewed by:	gnn, jch, stas
MFC after:	3 days
Sponsored by:	Verisign, Inc.
Differential Revision:	https://reviews.freebsd.org/D4350
2015-12-24 19:09:48 +00:00

48 lines
1.9 KiB
C

/*-
* Copyright (c) 2015 Patrick Kelsey
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _TCP_FASTOPEN_H_
#define _TCP_FASTOPEN_H_
#ifdef _KERNEL
#define TCP_FASTOPEN_COOKIE_LEN 8 /* tied to SipHash24 64-bit output */
VNET_DECLARE(unsigned int, tcp_fastopen_enabled);
#define V_tcp_fastopen_enabled VNET(tcp_fastopen_enabled)
void tcp_fastopen_init(void);
void tcp_fastopen_destroy(void);
unsigned int *tcp_fastopen_alloc_counter(void);
void tcp_fastopen_decrement_counter(unsigned int *counter);
int tcp_fastopen_check_cookie(struct in_conninfo *inc, uint8_t *cookie,
unsigned int len, uint64_t *latest_cookie);
#endif /* _KERNEL */
#endif /* _TCP_FASTOPEN_H_ */