1*27b03b36SApple OSS Distributions /* 2*27b03b36SApple OSS Distributions * Copyright (c) 2015-2016 Apple Inc. All rights reserved. 3*27b03b36SApple OSS Distributions * 4*27b03b36SApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5*27b03b36SApple OSS Distributions * 6*27b03b36SApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code 7*27b03b36SApple OSS Distributions * as defined in and that are subject to the Apple Public Source License 8*27b03b36SApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in 9*27b03b36SApple OSS Distributions * compliance with the License. The rights granted to you under the License 10*27b03b36SApple OSS Distributions * may not be used to create, or enable the creation or redistribution of, 11*27b03b36SApple OSS Distributions * unlawful or unlicensed copies of an Apple operating system, or to 12*27b03b36SApple OSS Distributions * circumvent, violate, or enable the circumvention or violation of, any 13*27b03b36SApple OSS Distributions * terms of an Apple operating system software license agreement. 14*27b03b36SApple OSS Distributions * 15*27b03b36SApple OSS Distributions * Please obtain a copy of the License at 16*27b03b36SApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this file. 17*27b03b36SApple OSS Distributions * 18*27b03b36SApple OSS Distributions * The Original Code and all software distributed under the License are 19*27b03b36SApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20*27b03b36SApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21*27b03b36SApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22*27b03b36SApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23*27b03b36SApple OSS Distributions * Please see the License for the specific language governing rights and 24*27b03b36SApple OSS Distributions * limitations under the License. 25*27b03b36SApple OSS Distributions * 26*27b03b36SApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27*27b03b36SApple OSS Distributions */ 28*27b03b36SApple OSS Distributions 29*27b03b36SApple OSS Distributions /* TCP-cache to store and retrieve TCP-related information */ 30*27b03b36SApple OSS Distributions 31*27b03b36SApple OSS Distributions #ifndef _NETINET_TCP_CACHE_H 32*27b03b36SApple OSS Distributions #define _NETINET_TCP_CACHE_H 33*27b03b36SApple OSS Distributions 34*27b03b36SApple OSS Distributions #include <netinet/tcp_var.h> 35*27b03b36SApple OSS Distributions #include <netinet/in.h> 36*27b03b36SApple OSS Distributions 37*27b03b36SApple OSS Distributions #define ECN_MIN_CE_PROBES 10 /* Probes are basically the number of incoming packets */ 38*27b03b36SApple OSS Distributions #define ECN_MAX_CE_RATIO 7 /* Ratio is the maximum number of CE-packets we accept per incoming "probe" */ 39*27b03b36SApple OSS Distributions 40*27b03b36SApple OSS Distributions extern void tcp_cache_set_cookie(struct tcpcb *tp, u_char *cookie, u_int8_t len); 41*27b03b36SApple OSS Distributions extern int tcp_cache_get_cookie(struct tcpcb *tp, u_char *cookie, u_int8_t *len); 42*27b03b36SApple OSS Distributions extern unsigned int tcp_cache_get_cookie_len(struct tcpcb *tp); 43*27b03b36SApple OSS Distributions extern uint8_t tcp_cache_get_mptcp_version(struct sockaddr* dst); 44*27b03b36SApple OSS Distributions extern void tcp_cache_update_mptcp_version(struct tcpcb *tp, boolean_t succeeded); 45*27b03b36SApple OSS Distributions 46*27b03b36SApple OSS Distributions extern void tcp_heuristic_tfo_loss(struct tcpcb *tp); 47*27b03b36SApple OSS Distributions extern void tcp_heuristic_tfo_rst(struct tcpcb *tp); 48*27b03b36SApple OSS Distributions extern void tcp_heuristic_mptcp_loss(struct tcpcb *tp); 49*27b03b36SApple OSS Distributions extern void tcp_heuristic_ecn_loss(struct tcpcb *tp); 50*27b03b36SApple OSS Distributions extern void tcp_heuristic_tfo_middlebox(struct tcpcb *tp); 51*27b03b36SApple OSS Distributions extern void tcp_heuristic_ecn_aggressive(struct tcpcb *tp); 52*27b03b36SApple OSS Distributions extern void tcp_heuristic_tfo_success(struct tcpcb *tp); 53*27b03b36SApple OSS Distributions extern void tcp_heuristic_mptcp_success(struct tcpcb *tp); 54*27b03b36SApple OSS Distributions extern void tcp_heuristic_ecn_success(struct tcpcb *tp); 55*27b03b36SApple OSS Distributions extern boolean_t tcp_heuristic_do_tfo(struct tcpcb *tp); 56*27b03b36SApple OSS Distributions extern int tcp_heuristic_do_mptcp(struct tcpcb *tp); 57*27b03b36SApple OSS Distributions extern boolean_t tcp_heuristic_do_ecn(struct tcpcb *tp); 58*27b03b36SApple OSS Distributions extern void tcp_heuristic_ecn_droprst(struct tcpcb *tp); 59*27b03b36SApple OSS Distributions extern void tcp_heuristic_ecn_droprxmt(struct tcpcb *tp); 60*27b03b36SApple OSS Distributions extern void tcp_heuristic_ecn_synrst(struct tcpcb *tp); 61*27b03b36SApple OSS Distributions 62*27b03b36SApple OSS Distributions extern boolean_t tcp_heuristic_do_ecn_with_address(struct ifnet *ifp, 63*27b03b36SApple OSS Distributions union sockaddr_in_4_6 *local_address); 64*27b03b36SApple OSS Distributions extern void tcp_heuristics_ecn_update(struct necp_tcp_ecn_cache *necp_buffer, 65*27b03b36SApple OSS Distributions struct ifnet *ifp, union sockaddr_in_4_6 *local_address); 66*27b03b36SApple OSS Distributions extern boolean_t tcp_heuristic_do_tfo_with_address(struct ifnet *ifp, 67*27b03b36SApple OSS Distributions union sockaddr_in_4_6 *local_address, union sockaddr_in_4_6 *remote_address, 68*27b03b36SApple OSS Distributions u_int8_t *cookie, u_int8_t *cookie_len); 69*27b03b36SApple OSS Distributions extern void tcp_heuristics_tfo_update(struct necp_tcp_tfo_cache *necp_buffer, 70*27b03b36SApple OSS Distributions struct ifnet *ifp, union sockaddr_in_4_6 *local_address, 71*27b03b36SApple OSS Distributions union sockaddr_in_4_6 *remote_address); 72*27b03b36SApple OSS Distributions 73*27b03b36SApple OSS Distributions extern void tcp_cache_init(void); 74*27b03b36SApple OSS Distributions 75*27b03b36SApple OSS Distributions #endif /* _NETINET_TCP_CACHE_H */ 76