2 * Copyright (c) 2015-2017 Patrick Kelsey
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
29 #ifndef _TCP_FASTOPEN_H_
30 #define _TCP_FASTOPEN_H_
36 #define TCP_FASTOPEN_COOKIE_LEN 8 /* SipHash24 64-bit output */
39 VNET_DECLARE(unsigned int, tcp_fastopen_client_enable);
40 #define V_tcp_fastopen_client_enable VNET(tcp_fastopen_client_enable)
42 VNET_DECLARE(unsigned int, tcp_fastopen_server_enable);
43 #define V_tcp_fastopen_server_enable VNET(tcp_fastopen_server_enable)
45 #define V_tcp_fastopen_client_enable 0
46 #define V_tcp_fastopen_server_enable 0
47 #endif /* TCP_RFC7413 */
49 union tcp_fastopen_ip_addr {
54 struct tcp_fastopen_ccache_entry {
55 TAILQ_ENTRY(tcp_fastopen_ccache_entry) cce_link;
56 union tcp_fastopen_ip_addr cce_client_ip; /* network byte order */
57 union tcp_fastopen_ip_addr cce_server_ip; /* network byte order */
58 uint16_t server_port; /* network byte order */
59 uint16_t server_mss; /* host byte order */
62 uint8_t cookie[TCP_FASTOPEN_MAX_COOKIE_LEN];
63 sbintime_t disable_time; /* non-zero value means path is disabled */
66 struct tcp_fastopen_ccache;
68 struct tcp_fastopen_ccache_bucket {
70 TAILQ_HEAD(bucket_entries, tcp_fastopen_ccache_entry) ccb_entries;
72 struct tcp_fastopen_ccache *ccb_ccache;
75 struct tcp_fastopen_ccache {
77 struct tcp_fastopen_ccache_bucket *base;
78 unsigned int bucket_limit;
85 void tcp_fastopen_init(void);
86 void tcp_fastopen_destroy(void);
87 unsigned int *tcp_fastopen_alloc_counter(void);
88 void tcp_fastopen_decrement_counter(unsigned int *);
89 int tcp_fastopen_check_cookie(struct in_conninfo *, uint8_t *, unsigned int,
91 void tcp_fastopen_connect(struct tcpcb *);
92 void tcp_fastopen_disable_path(struct tcpcb *);
93 void tcp_fastopen_update_cache(struct tcpcb *, uint16_t, uint8_t,
97 tcp_fastopen_init(void)
102 tcp_fastopen_destroy(void)
106 static __inline unsigned int *
107 tcp_fastopen_alloc_counter(void)
113 tcp_fastopen_decrement_counter(unsigned int *_counter)
118 tcp_fastopen_check_cookie(struct in_conninfo *_inc, uint8_t *_cookie,
119 unsigned int _len, uint64_t *_latest_cookie)
125 tcp_fastopen_connect(struct tcpcb *_tp)
130 tcp_fastopen_disable_path(struct tcpcb *_tp)
135 tcp_fastopen_update_cache(struct tcpcb *_tp, uint16_t _mss, uint8_t _cookie_len,
139 #endif /* TCP_RFC7413 */
143 #endif /* _TCP_FASTOPEN_H_ */