1/*
2 * Copyright (c) 2012-2013 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 int tcp_do_mptcp_options(struct tcpcb *, u_char *, struct tcphdr *,
45    struct tcpopt *, int);
46extern unsigned mptcp_setup_syn_opts(struct socket *, int, u_char*, unsigned);
47extern unsigned mptcp_setup_join_ack_opts(struct tcpcb *, u_char*, unsigned);
48extern void mptcp_update_dss_send_state(struct mptcb *, u_int64_t);
49extern void mptcp_send_addaddr_opt(struct tcpcb *, struct mptcp_addaddr_opt *);
50extern void mptcp_send_remaddr_opt(struct tcpcb *, struct mptcp_remaddr_opt *);
51extern unsigned int mptcp_setup_opts(struct tcpcb *, int, u_char *,
52    unsigned int, int, int, unsigned int **, u_int8_t **, u_int64_t *,
53    u_int32_t **, boolean_t *);
54extern void mptcp_update_dss_rcv_state(struct mptcp_dsn_opt *, struct tcpcb *,
55    uint16_t);
56extern void mptcp_update_rcv_state_f(struct mptcp_dss_ack_opt *,
57    struct tcpcb *, uint16_t);
58extern void mptcp_update_rcv_state_g(struct mptcp_dss64_ack32_opt *,
59    struct tcpcb *, uint16_t);
60extern void mptcp_update_rcv_state_meat(struct mptcb *, struct tcpcb *,
61    u_int64_t, u_int32_t, u_int16_t, uint16_t);
62extern void mptcp_data_ack_rcvd(struct mptcb *, struct tcpcb *, u_int64_t);
63__END_DECLS
64
65#endif /* BSD_KERNEL_PRIVATE */
66#endif /* !_NETINET_MPTCP_OPT_H_ */
67