/*
 * Copyright (c) 2012-2013 Apple Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 *
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 *
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 *
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */

#ifndef _NETINET_MPTCP_OPT_H_
#define	_NETINET_MPTCP_OPT_H_

#ifdef BSD_KERNEL_PRIVATE

/*
 * Try setting up an MPTCP connection by making atleast 3 attempts,
 * that is 2 retransmissions - needed for Weak WiFi and long delay cellular.
 * This number must be bumped higher when we are assured that middleboxes
 * are not the reason for retries. Generally, on weak wifi and cold start
 * cellular, more than 2 retries are necessary.
 */
#define	MPTCP_CAPABLE_RETRIES	(2)

__BEGIN_DECLS
extern int tcp_do_mptcp_options(struct tcpcb *, u_char *, struct tcphdr *,
    struct tcpopt *, int);
extern unsigned mptcp_setup_syn_opts(struct socket *, int, u_char*, unsigned);
extern unsigned mptcp_setup_join_ack_opts(struct tcpcb *, u_char*, unsigned);
extern void mptcp_update_dss_send_state(struct mptcb *, u_int64_t);
extern void mptcp_send_addaddr_opt(struct tcpcb *, struct mptcp_addaddr_opt *);
extern void mptcp_send_remaddr_opt(struct tcpcb *, struct mptcp_remaddr_opt *);
extern unsigned int mptcp_setup_opts(struct tcpcb *, int, u_char *,
    unsigned int, int, int, unsigned int **, u_int8_t **, u_int64_t *,
    u_int32_t **, boolean_t *);
extern void mptcp_update_dss_rcv_state(struct mptcp_dsn_opt *, struct tcpcb *,
    uint16_t);
extern void mptcp_update_rcv_state_f(struct mptcp_dss_ack_opt *,
    struct tcpcb *, uint16_t);
extern void mptcp_update_rcv_state_g(struct mptcp_dss64_ack32_opt *,
    struct tcpcb *, uint16_t);
extern void mptcp_update_rcv_state_meat(struct mptcb *, struct tcpcb *,
    u_int64_t, u_int32_t, u_int16_t, uint16_t);
extern void mptcp_data_ack_rcvd(struct mptcb *, struct tcpcb *, u_int64_t);
__END_DECLS

#endif /* BSD_KERNEL_PRIVATE */
#endif /* !_NETINET_MPTCP_OPT_H_ */