1/*
2 * Copyright (c) 2012-2017 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#ifndef _NETINET_MPTCP_OPT_H_
30#define _NETINET_MPTCP_OPT_H_
31
32#ifdef BSD_KERNEL_PRIVATE
33
34/*
35 * Try setting up an MPTCP connection by making atleast 3 attempts,
36 * that is 2 retransmissions - needed for Weak WiFi and long delay cellular.
37 * This number must be bumped higher when we are assured that middleboxes
38 * are not the reason for retries. Generally, on weak wifi and cold start
39 * cellular, more than 2 retries are necessary.
40 */
41#define MPTCP_CAPABLE_RETRIES (2)
42
43__BEGIN_DECLS
44extern void mptcp_data_ack_rcvd(struct mptcb *mp_tp, struct tcpcb *tp, u_int64_t full_dack);
45extern void mptcp_update_window_wakeup(struct tcpcb *tp);
46extern void tcp_do_mptcp_options(struct tcpcb *, u_char *, struct tcphdr *,
47 struct tcpopt *, int);
48extern unsigned mptcp_setup_syn_opts(struct socket *, u_char*, unsigned);
49extern unsigned mptcp_setup_join_ack_opts(struct tcpcb *, u_char*, unsigned);
50extern unsigned int mptcp_setup_opts(struct tcpcb *tp, int32_t off, u_char *opt,
51 unsigned int optlen, int flags, int len,
52 boolean_t *p_mptcp_acknow);
53extern void mptcp_update_dss_rcv_state(struct mptcp_dsn_opt *, struct tcpcb *,
54 uint16_t);
55extern void mptcp_update_rcv_state_meat(struct mptcb *, struct tcpcb *,
56 u_int64_t, u_int32_t, u_int16_t, uint16_t);
57__END_DECLS
58
59#endif /* BSD_KERNEL_PRIVATE */
60#endif /* !_NETINET_MPTCP_OPT_H_ */
61