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