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