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/*-
* Copyright (c) 2015-2017 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.
*/
#ifndef _TCP_FASTOPEN_H_
#define _TCP_FASTOPEN_H_
#ifdef _KERNEL
#include "opt_inet.h"
#define TCP_FASTOPEN_COOKIE_LEN 8 /* SipHash24 64-bit output */
#ifdef TCP_RFC7413
VNET_DECLARE(unsigned int, tcp_fastopen_client_enable);
#define V_tcp_fastopen_client_enable VNET(tcp_fastopen_client_enable)
VNET_DECLARE(unsigned int, tcp_fastopen_server_enable);
#define V_tcp_fastopen_server_enable VNET(tcp_fastopen_server_enable)
#else
#define V_tcp_fastopen_client_enable 0
#define V_tcp_fastopen_server_enable 0
#endif /* TCP_RFC7413 */
union tcp_fastopen_ip_addr {
struct in_addr v4;
struct in6_addr v6;
};
struct tcp_fastopen_ccache_entry {
TAILQ_ENTRY(tcp_fastopen_ccache_entry) cce_link;
union tcp_fastopen_ip_addr cce_client_ip; /* network byte order */
union tcp_fastopen_ip_addr cce_server_ip; /* network byte order */
uint16_t server_port; /* network byte order */
uint16_t server_mss; /* host byte order */
uint8_t af;
uint8_t cookie_len;
uint8_t cookie[TCP_FASTOPEN_MAX_COOKIE_LEN];
sbintime_t disable_time; /* non-zero value means path is disabled */
};
struct tcp_fastopen_ccache;
struct tcp_fastopen_ccache_bucket {
struct mtx ccb_mtx;
TAILQ_HEAD(bucket_entries, tcp_fastopen_ccache_entry) ccb_entries;
int ccb_num_entries;
struct tcp_fastopen_ccache *ccb_ccache;
};
struct tcp_fastopen_ccache {
uma_zone_t zone;
struct tcp_fastopen_ccache_bucket *base;
unsigned int bucket_limit;
unsigned int buckets;
unsigned int mask;
uint32_t secret;
};
#ifdef TCP_RFC7413
void tcp_fastopen_init(void);
void tcp_fastopen_destroy(void);
unsigned int *tcp_fastopen_alloc_counter(void);
void tcp_fastopen_decrement_counter(unsigned int *);
int tcp_fastopen_check_cookie(struct in_conninfo *, uint8_t *, unsigned int,
uint64_t *);
void tcp_fastopen_connect(struct tcpcb *);
void tcp_fastopen_disable_path(struct tcpcb *);
void tcp_fastopen_update_cache(struct tcpcb *, uint16_t, uint8_t,
uint8_t *);
#else
static __inline void
tcp_fastopen_init(void)
{
}
static __inline void
tcp_fastopen_destroy(void)
{
}
static __inline unsigned int *
tcp_fastopen_alloc_counter(void)
{
return (NULL);
}
static __inline void
tcp_fastopen_decrement_counter(unsigned int *_counter)
{
}
static __inline int
tcp_fastopen_check_cookie(struct in_conninfo *_inc, uint8_t *_cookie,
unsigned int _len, uint64_t *_latest_cookie)
{
return (-1);
}
static __inline void
tcp_fastopen_connect(struct tcpcb *_tp)
{
}
static __inline void
tcp_fastopen_disable_path(struct tcpcb *_tp)
{
}
static __inline void
tcp_fastopen_update_cache(struct tcpcb *_tp, uint16_t _mss, uint8_t _cookie_len,
uint8_t *_cookie)
{
}
#endif /* TCP_RFC7413 */
#endif /* _KERNEL */
#endif /* _TCP_FASTOPEN_H_ */
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