1 /*- 2 * Copyright (c) 2015-2017 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 27 #ifndef _TCP_FASTOPEN_H_ 28 #define _TCP_FASTOPEN_H_ 29 30 #ifdef _KERNEL 31 32 #include "opt_inet.h" 33 34 #define TCP_FASTOPEN_COOKIE_LEN 8 /* SipHash24 64-bit output */ 35 36 #ifdef TCP_RFC7413 37 VNET_DECLARE(unsigned int, tcp_fastopen_client_enable); 38 #define V_tcp_fastopen_client_enable VNET(tcp_fastopen_client_enable) 39 40 VNET_DECLARE(unsigned int, tcp_fastopen_server_enable); 41 #define V_tcp_fastopen_server_enable VNET(tcp_fastopen_server_enable) 42 #else 43 #define V_tcp_fastopen_client_enable 0 44 #define V_tcp_fastopen_server_enable 0 45 #endif /* TCP_RFC7413 */ 46 47 struct tcpcb; 48 #ifdef TCP_RFC7413 49 void tcp_fastopen_init(void); 50 void tcp_fastopen_vnet_init(void); 51 void tcp_fastopen_vnet_destroy(void); 52 unsigned int *tcp_fastopen_alloc_counter(void); 53 void tcp_fastopen_decrement_counter(unsigned int *); 54 int tcp_fastopen_check_cookie(struct in_conninfo *, uint8_t *, unsigned int, 55 uint64_t *); 56 void tcp_fastopen_connect(struct tcpcb *); 57 void tcp_fastopen_disable_path(struct tcpcb *); 58 void tcp_fastopen_update_cache(struct tcpcb *, uint16_t, uint8_t, 59 uint8_t *); 60 #else 61 static __inline void 62 tcp_fastopen_init(void) 63 { 64 } 65 66 static __inline void 67 tcp_fastopen_vnet_init(void) 68 { 69 } 70 71 static __inline void 72 tcp_fastopen_vnet_destroy(void) 73 { 74 } 75 76 static __inline unsigned int * 77 tcp_fastopen_alloc_counter(void) 78 { 79 return (NULL); 80 } 81 82 static __inline void 83 tcp_fastopen_decrement_counter(unsigned int *_counter) 84 { 85 } 86 87 static __inline int 88 tcp_fastopen_check_cookie(struct in_conninfo *_inc, uint8_t *_cookie, 89 unsigned int _len, uint64_t *_latest_cookie) 90 { 91 return (-1); 92 } 93 94 static __inline void 95 tcp_fastopen_connect(struct tcpcb *_tp) 96 { 97 } 98 99 static __inline void 100 tcp_fastopen_disable_path(struct tcpcb *_tp) 101 { 102 } 103 104 static __inline void 105 tcp_fastopen_update_cache(struct tcpcb *_tp, uint16_t _mss, uint8_t _cookie_len, 106 uint8_t *_cookie) 107 { 108 } 109 #endif /* TCP_RFC7413 */ 110 111 #endif /* _KERNEL */ 112 113 #endif /* _TCP_FASTOPEN_H_ */ 114