/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * a) Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *
 * b) Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the distribution.
 *
 * c) Neither the name of Cisco Systems, Inc. nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _NETINET_SCTP_UIO_H_
#define _NETINET_SCTP_UIO_H_

#if !defined(_KERNEL)
#include <stdint.h>
#endif
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>

typedef uint32_t sctp_assoc_t;

#define SCTP_FUTURE_ASSOC  0
#define SCTP_CURRENT_ASSOC 1
#define SCTP_ALL_ASSOC     2

struct sctp_event {
        sctp_assoc_t se_assoc_id;
        uint16_t se_type;
        uint8_t se_on;
};

/* Compatibility to previous define's */
#define sctp_stream_reset_events sctp_stream_reset_event

/* On/Off setup for subscription to events */
struct sctp_event_subscribe {
        uint8_t sctp_data_io_event;
        uint8_t sctp_association_event;
        uint8_t sctp_address_event;
        uint8_t sctp_send_failure_event;
        uint8_t sctp_peer_error_event;
        uint8_t sctp_shutdown_event;
        uint8_t sctp_partial_delivery_event;
        uint8_t sctp_adaptation_layer_event;
        uint8_t sctp_authentication_event;
        uint8_t sctp_sender_dry_event;
        uint8_t sctp_stream_reset_event;
};

/* ancillary data types */
#define SCTP_INIT       0x0001
#define SCTP_SNDRCV     0x0002
#define SCTP_EXTRCV     0x0003
#define SCTP_SNDINFO    0x0004
#define SCTP_RCVINFO    0x0005
#define SCTP_NXTINFO    0x0006
#define SCTP_PRINFO     0x0007
#define SCTP_AUTHINFO   0x0008
#define SCTP_DSTADDRV4  0x0009
#define SCTP_DSTADDRV6  0x000a

/*
 * ancillary data structures
 */
struct sctp_initmsg {
        uint16_t sinit_num_ostreams;
        uint16_t sinit_max_instreams;
        uint16_t sinit_max_attempts;
        uint16_t sinit_max_init_timeo;
};

/* We add 96 bytes to the size of sctp_sndrcvinfo.
 * This makes the current structure 128 bytes long
 * which is nicely 64 bit aligned but also has room
 * for us to add more and keep ABI compatibility.
 * For example, already we have the sctp_extrcvinfo
 * when enabled which is 48 bytes.
 */

/*
 * The assoc up needs a verfid
 * all sendrcvinfo's need a verfid for SENDING only.
 */

#define SCTP_ALIGN_RESV_PAD 92
#define SCTP_ALIGN_RESV_PAD_SHORT 76

struct sctp_sndrcvinfo {
        uint16_t sinfo_stream;
        uint16_t sinfo_ssn;
        uint16_t sinfo_flags;
        uint32_t sinfo_ppid;
        uint32_t sinfo_context;
        uint32_t sinfo_timetolive;
        uint32_t sinfo_tsn;
        uint32_t sinfo_cumtsn;
        sctp_assoc_t sinfo_assoc_id;
        uint16_t sinfo_keynumber;
        uint16_t sinfo_keynumber_valid;
        uint8_t __reserve_pad[SCTP_ALIGN_RESV_PAD];
};

struct sctp_extrcvinfo {
        uint16_t sinfo_stream;
        uint16_t sinfo_ssn;
        uint16_t sinfo_flags;
        uint32_t sinfo_ppid;
        uint32_t sinfo_context;
        uint32_t sinfo_timetolive;      /* should have been sinfo_pr_value */
        uint32_t sinfo_tsn;
        uint32_t sinfo_cumtsn;
        sctp_assoc_t sinfo_assoc_id;
        uint16_t serinfo_next_flags;
        uint16_t serinfo_next_stream;
        uint32_t serinfo_next_aid;
        uint32_t serinfo_next_length;
        uint32_t serinfo_next_ppid;
        uint16_t sinfo_keynumber;
        uint16_t sinfo_keynumber_valid;
        uint8_t __reserve_pad[SCTP_ALIGN_RESV_PAD_SHORT];
};
#define sinfo_pr_value sinfo_timetolive
#define sreinfo_next_flags serinfo_next_flags
#define sreinfo_next_stream serinfo_next_stream
#define sreinfo_next_aid serinfo_next_aid
#define sreinfo_next_length serinfo_next_length
#define sreinfo_next_ppid serinfo_next_ppid

struct sctp_sndinfo {
        uint16_t snd_sid;
        uint16_t snd_flags;
        uint32_t snd_ppid;
        uint32_t snd_context;
        sctp_assoc_t snd_assoc_id;
};

struct sctp_prinfo {
        uint16_t pr_policy;
        uint32_t pr_value;
};

struct sctp_default_prinfo {
        uint16_t pr_policy;
        uint32_t pr_value;
        sctp_assoc_t pr_assoc_id;
};

struct sctp_authinfo {
        uint16_t auth_keynumber;
};

struct sctp_rcvinfo {
        uint16_t rcv_sid;
        uint16_t rcv_ssn;
        uint16_t rcv_flags;
        uint32_t rcv_ppid;
        uint32_t rcv_tsn;
        uint32_t rcv_cumtsn;
        uint32_t rcv_context;
        sctp_assoc_t rcv_assoc_id;
};

struct sctp_nxtinfo {
        uint16_t nxt_sid;
        uint16_t nxt_flags;
        uint32_t nxt_ppid;
        uint32_t nxt_length;
        sctp_assoc_t nxt_assoc_id;
};

#define SCTP_NO_NEXT_MSG           0x0000
#define SCTP_NEXT_MSG_AVAIL        0x0001
#define SCTP_NEXT_MSG_ISCOMPLETE   0x0002
#define SCTP_NEXT_MSG_IS_UNORDERED 0x0004
#define SCTP_NEXT_MSG_IS_NOTIFICATION 0x0008

struct sctp_recvv_rn {
        struct sctp_rcvinfo recvv_rcvinfo;
        struct sctp_nxtinfo recvv_nxtinfo;
};

#define SCTP_RECVV_NOINFO  0
#define SCTP_RECVV_RCVINFO 1
#define SCTP_RECVV_NXTINFO 2
#define SCTP_RECVV_RN      3

#define SCTP_SENDV_NOINFO   0
#define SCTP_SENDV_SNDINFO  1
#define SCTP_SENDV_PRINFO   2
#define SCTP_SENDV_AUTHINFO 3
#define SCTP_SENDV_SPA      4

struct sctp_sendv_spa {
        uint32_t sendv_flags;
        struct sctp_sndinfo sendv_sndinfo;
        struct sctp_prinfo sendv_prinfo;
        struct sctp_authinfo sendv_authinfo;
};

#define SCTP_SEND_SNDINFO_VALID  0x00000001
#define SCTP_SEND_PRINFO_VALID   0x00000002
#define SCTP_SEND_AUTHINFO_VALID 0x00000004

struct sctp_snd_all_completes {
        uint16_t sall_stream;
        uint16_t sall_flags;
        uint32_t sall_ppid;
        uint32_t sall_context;
        uint32_t sall_num_sent;
        uint32_t sall_num_failed;
};

/* Flags that go into the sinfo->sinfo_flags field */
#define SCTP_NOTIFICATION     0x0010    /* next message is a notification */
#define SCTP_COMPLETE         0x0020    /* next message is complete */
#define SCTP_EOF              0x0100    /* Start shutdown procedures */
#define SCTP_ABORT            0x0200    /* Send an ABORT to peer */
#define SCTP_UNORDERED        0x0400    /* Message is un-ordered */
#define SCTP_ADDR_OVER        0x0800    /* Override the primary-address */
#define SCTP_SENDALL          0x1000    /* Send this on all associations */
#define SCTP_EOR              0x2000    /* end of message signal */
#define SCTP_SACK_IMMEDIATELY 0x4000    /* Set I-Bit */

#define INVALID_SINFO_FLAG(x) (((x) & 0xfffffff0 \
                                    & ~(SCTP_EOF | SCTP_ABORT | SCTP_UNORDERED |\
                                        SCTP_ADDR_OVER | SCTP_SENDALL | SCTP_EOR |\
                                        SCTP_SACK_IMMEDIATELY)) != 0)
/* for the endpoint */

/* The lower four bits is an enumeration of PR-SCTP policies */
#define SCTP_PR_SCTP_NONE 0x0000        /* Reliable transfer */
#define SCTP_PR_SCTP_TTL  0x0001        /* Time based PR-SCTP */
#define SCTP_PR_SCTP_PRIO 0x0002        /* Buffer based PR-SCTP */
#define SCTP_PR_SCTP_BUF  SCTP_PR_SCTP_PRIO     /* For backwards compatibility */
#define SCTP_PR_SCTP_RTX  0x0003        /* Number of retransmissions based
                                         * PR-SCTP */
#define SCTP_PR_SCTP_MAX  SCTP_PR_SCTP_RTX
#define SCTP_PR_SCTP_ALL  0x000f        /* Used for aggregated stats */

#define PR_SCTP_POLICY(x)         ((x) & 0x0f)
#define PR_SCTP_ENABLED(x)        ((PR_SCTP_POLICY(x) != SCTP_PR_SCTP_NONE) && \
                                   (PR_SCTP_POLICY(x) != SCTP_PR_SCTP_ALL))
#define PR_SCTP_TTL_ENABLED(x)    (PR_SCTP_POLICY(x) == SCTP_PR_SCTP_TTL)
#define PR_SCTP_BUF_ENABLED(x)    (PR_SCTP_POLICY(x) == SCTP_PR_SCTP_BUF)
#define PR_SCTP_RTX_ENABLED(x)    (PR_SCTP_POLICY(x) == SCTP_PR_SCTP_RTX)
#define PR_SCTP_INVALID_POLICY(x) (PR_SCTP_POLICY(x) > SCTP_PR_SCTP_MAX)
#define PR_SCTP_VALID_POLICY(x)   (PR_SCTP_POLICY(x) <= SCTP_PR_SCTP_MAX)

/* Stat's */
struct sctp_pcbinfo {
        uint32_t ep_count;
        uint32_t asoc_count;
        uint32_t laddr_count;
        uint32_t raddr_count;
        uint32_t chk_count;
        uint32_t readq_count;
        uint32_t free_chunks;
        uint32_t stream_oque;
};

struct sctp_sockstat {
        sctp_assoc_t ss_assoc_id;
        uint32_t ss_total_sndbuf;
        uint32_t ss_total_recv_buf;
};

/*
 * notification event structures
 */

/*
 * association change event
 */
struct sctp_assoc_change {
        uint16_t sac_type;
        uint16_t sac_flags;
        uint32_t sac_length;
        uint16_t sac_state;
        uint16_t sac_error;
        uint16_t sac_outbound_streams;
        uint16_t sac_inbound_streams;
        sctp_assoc_t sac_assoc_id;
        uint8_t sac_info[];
};

/* sac_state values */
#define SCTP_COMM_UP            0x0001
#define SCTP_COMM_LOST          0x0002
#define SCTP_RESTART            0x0003
#define SCTP_SHUTDOWN_COMP      0x0004
#define SCTP_CANT_STR_ASSOC     0x0005

/* sac_info values */
#define SCTP_ASSOC_SUPPORTS_PR                  0x01
#define SCTP_ASSOC_SUPPORTS_AUTH                0x02
#define SCTP_ASSOC_SUPPORTS_ASCONF              0x03
#define SCTP_ASSOC_SUPPORTS_MULTIBUF            0x04
#define SCTP_ASSOC_SUPPORTS_RE_CONFIG           0x05
#define SCTP_ASSOC_SUPPORTS_INTERLEAVING        0x06
#define SCTP_ASSOC_SUPPORTS_MAX                 0x06
/*
 * Address event
 */
struct sctp_paddr_change {
        uint16_t spc_type;
        uint16_t spc_flags;
        uint32_t spc_length;
        struct sockaddr_storage spc_aaddr;
        uint32_t spc_state;
        uint32_t spc_error;
        sctp_assoc_t spc_assoc_id;
};

/* paddr state values */
#define SCTP_ADDR_AVAILABLE     0x0001
#define SCTP_ADDR_UNREACHABLE   0x0002
#define SCTP_ADDR_REMOVED       0x0003
#define SCTP_ADDR_ADDED         0x0004
#define SCTP_ADDR_MADE_PRIM     0x0005
#define SCTP_ADDR_CONFIRMED     0x0006

#define SCTP_ACTIVE             0x0001  /* SCTP_ADDR_REACHABLE */
#define SCTP_INACTIVE           0x0002  /* neither SCTP_ADDR_REACHABLE nor
                                         * SCTP_ADDR_UNCONFIRMED */
#define SCTP_UNCONFIRMED        0x0200  /* SCTP_ADDR_UNCONFIRMED */

/* remote error events */
struct sctp_remote_error {
        uint16_t sre_type;
        uint16_t sre_flags;
        uint32_t sre_length;
        uint16_t sre_error;
        sctp_assoc_t sre_assoc_id;
        uint8_t sre_data[];
};

/* data send failure event (deprecated) */
struct sctp_send_failed {
        uint16_t ssf_type;
        uint16_t ssf_flags;
        uint32_t ssf_length;
        uint32_t ssf_error;
        struct sctp_sndrcvinfo ssf_info;
        sctp_assoc_t ssf_assoc_id;
        uint8_t ssf_data[];
};

/* data send failure event (not deprecated) */
struct sctp_send_failed_event {
        uint16_t ssfe_type;
        uint16_t ssfe_flags;
        uint32_t ssfe_length;
        uint32_t ssfe_error;
        struct sctp_sndinfo ssfe_info;
        sctp_assoc_t ssfe_assoc_id;
        uint8_t ssfe_data[];
};

/* flag that indicates state of data */
#define SCTP_DATA_UNSENT        0x0001  /* inqueue never on wire */
#define SCTP_DATA_SENT          0x0002  /* on wire at failure */

/* shutdown event */
struct sctp_shutdown_event {
        uint16_t sse_type;
        uint16_t sse_flags;
        uint32_t sse_length;
        sctp_assoc_t sse_assoc_id;
};

/* Adaptation layer indication stuff */
struct sctp_adaptation_event {
        uint16_t sai_type;
        uint16_t sai_flags;
        uint32_t sai_length;
        uint32_t sai_adaptation_ind;
        sctp_assoc_t sai_assoc_id;
};

struct sctp_setadaptation {
        uint32_t ssb_adaptation_ind;
};

/* compatible old spelling */
struct sctp_adaption_event {
        uint16_t sai_type;
        uint16_t sai_flags;
        uint32_t sai_length;
        uint32_t sai_adaption_ind;
        sctp_assoc_t sai_assoc_id;
};

struct sctp_setadaption {
        uint32_t ssb_adaption_ind;
};

/*
 * Partial Delivery API event
 */
struct sctp_pdapi_event {
        uint16_t pdapi_type;
        uint16_t pdapi_flags;
        uint32_t pdapi_length;
        uint32_t pdapi_indication;
        uint16_t pdapi_stream;
        uint16_t pdapi_seq;
        sctp_assoc_t pdapi_assoc_id;
};

/* indication values */
#define SCTP_PARTIAL_DELIVERY_ABORTED   0x0001

/*
 * authentication key event
 */
struct sctp_authkey_event {
        uint16_t auth_type;
        uint16_t auth_flags;
        uint32_t auth_length;
        uint16_t auth_keynumber;
        uint16_t auth_altkeynumber;
        uint32_t auth_indication;
        sctp_assoc_t auth_assoc_id;
};

/* indication values */
#define SCTP_AUTH_NEW_KEY       0x0001
#define SCTP_AUTH_NEWKEY        SCTP_AUTH_NEW_KEY
#define SCTP_AUTH_NO_AUTH       0x0002
#define SCTP_AUTH_FREE_KEY      0x0003

struct sctp_sender_dry_event {
        uint16_t sender_dry_type;
        uint16_t sender_dry_flags;
        uint32_t sender_dry_length;
        sctp_assoc_t sender_dry_assoc_id;
};

/*
 * Stream reset event - subscribe to SCTP_STREAM_RESET_EVENT
 */
struct sctp_stream_reset_event {
        uint16_t strreset_type;
        uint16_t strreset_flags;
        uint32_t strreset_length;
        sctp_assoc_t strreset_assoc_id;
        uint16_t strreset_stream_list[];
};

/* flags in stream_reset_event (strreset_flags) */
#define SCTP_STREAM_RESET_INCOMING_SSN  0x0001
#define SCTP_STREAM_RESET_OUTGOING_SSN  0x0002
#define SCTP_STREAM_RESET_DENIED        0x0004
#define SCTP_STREAM_RESET_FAILED        0x0008

/*
 * Assoc reset event - subscribe to SCTP_ASSOC_RESET_EVENT
 */
struct sctp_assoc_reset_event {
        uint16_t assocreset_type;
        uint16_t assocreset_flags;
        uint32_t assocreset_length;
        sctp_assoc_t assocreset_assoc_id;
        uint32_t assocreset_local_tsn;
        uint32_t assocreset_remote_tsn;
};

#define SCTP_ASSOC_RESET_DENIED         0x0004
#define SCTP_ASSOC_RESET_FAILED         0x0008

/*
 * Stream change event - subscribe to SCTP_STREAM_CHANGE_EVENT
 */
struct sctp_stream_change_event {
        uint16_t strchange_type;
        uint16_t strchange_flags;
        uint32_t strchange_length;
        sctp_assoc_t strchange_assoc_id;
        uint16_t strchange_instrms;
        uint16_t strchange_outstrms;
};

#define SCTP_STREAM_CHANGE_DENIED       0x0004
#define SCTP_STREAM_CHANGE_FAILED       0x0008

/* SCTP notification event */
struct sctp_tlv {
        uint16_t sn_type;
        uint16_t sn_flags;
        uint32_t sn_length;
};

union sctp_notification {
        struct sctp_tlv sn_header;
        struct sctp_assoc_change sn_assoc_change;
        struct sctp_paddr_change sn_paddr_change;
        struct sctp_remote_error sn_remote_error;
        struct sctp_send_failed sn_send_failed;
        struct sctp_shutdown_event sn_shutdown_event;
        struct sctp_adaptation_event sn_adaptation_event;
        /* compatibility same as above */
        struct sctp_adaption_event sn_adaption_event;
        struct sctp_pdapi_event sn_pdapi_event;
        struct sctp_authkey_event sn_auth_event;
        struct sctp_sender_dry_event sn_sender_dry_event;
        struct sctp_send_failed_event sn_send_failed_event;
        struct sctp_stream_reset_event sn_strreset_event;
        struct sctp_assoc_reset_event sn_assocreset_event;
        struct sctp_stream_change_event sn_strchange_event;
};

/* notification types */
#define SCTP_ASSOC_CHANGE                       0x0001
#define SCTP_PEER_ADDR_CHANGE                   0x0002
#define SCTP_REMOTE_ERROR                       0x0003
#define SCTP_SEND_FAILED                        0x0004
#define SCTP_SHUTDOWN_EVENT                     0x0005
#define SCTP_ADAPTATION_INDICATION              0x0006
/* same as above */
#define SCTP_ADAPTION_INDICATION                0x0006
#define SCTP_PARTIAL_DELIVERY_EVENT             0x0007
#define SCTP_AUTHENTICATION_EVENT               0x0008
#define SCTP_STREAM_RESET_EVENT                 0x0009
#define SCTP_SENDER_DRY_EVENT                   0x000a
#define SCTP_NOTIFICATIONS_STOPPED_EVENT        0x000b  /* we don't send this */
#define SCTP_ASSOC_RESET_EVENT                  0x000c
#define SCTP_STREAM_CHANGE_EVENT                0x000d
#define SCTP_SEND_FAILED_EVENT                  0x000e
/*
 * socket option structs
 */

struct sctp_paddrparams {
        struct sockaddr_storage spp_address;
        sctp_assoc_t spp_assoc_id;
        uint32_t spp_hbinterval;
        uint32_t spp_pathmtu;
        uint32_t spp_flags;
        uint32_t spp_ipv6_flowlabel;
        uint16_t spp_pathmaxrxt;
        uint8_t spp_dscp;
};
#define spp_ipv4_tos spp_dscp

#define SPP_HB_ENABLE           0x00000001
#define SPP_HB_DISABLE          0x00000002
#define SPP_HB_DEMAND           0x00000004
#define SPP_PMTUD_ENABLE        0x00000008
#define SPP_PMTUD_DISABLE       0x00000010
#define SPP_HB_TIME_IS_ZERO     0x00000080
#define SPP_IPV6_FLOWLABEL      0x00000100
#define SPP_DSCP                0x00000200
#define SPP_IPV4_TOS            SPP_DSCP

struct sctp_paddrthlds {
        struct sockaddr_storage spt_address;
        sctp_assoc_t spt_assoc_id;
        uint16_t spt_pathmaxrxt;
        uint16_t spt_pathpfthld;
        uint16_t spt_pathcpthld;
};

struct sctp_paddrinfo {
        struct sockaddr_storage spinfo_address;
        sctp_assoc_t spinfo_assoc_id;
        int32_t spinfo_state;
        uint32_t spinfo_cwnd;
        uint32_t spinfo_srtt;
        uint32_t spinfo_rto;
        uint32_t spinfo_mtu;
};

struct sctp_rtoinfo {
        sctp_assoc_t srto_assoc_id;
        uint32_t srto_initial;
        uint32_t srto_max;
        uint32_t srto_min;
};

struct sctp_assocparams {
        sctp_assoc_t sasoc_assoc_id;
        uint32_t sasoc_peer_rwnd;
        uint32_t sasoc_local_rwnd;
        uint32_t sasoc_cookie_life;
        uint16_t sasoc_asocmaxrxt;
        uint16_t sasoc_number_peer_destinations;
};

struct sctp_setprim {
        struct sockaddr_storage ssp_addr;
        sctp_assoc_t ssp_assoc_id;
        uint8_t ssp_padding[4];
};

struct sctp_setpeerprim {
        struct sockaddr_storage sspp_addr;
        sctp_assoc_t sspp_assoc_id;
        uint8_t sspp_padding[4];
};

union sctp_sockstore {
        struct sockaddr_in sin;
        struct sockaddr_in6 sin6;
        struct sockaddr sa;
};

struct sctp_getaddresses {
        sctp_assoc_t sget_assoc_id;
        union sctp_sockstore addr[];
};

struct sctp_status {
        sctp_assoc_t sstat_assoc_id;
        int32_t sstat_state;
        uint32_t sstat_rwnd;
        uint16_t sstat_unackdata;
        uint16_t sstat_penddata;
        uint16_t sstat_instrms;
        uint16_t sstat_outstrms;
        uint32_t sstat_fragmentation_point;
        struct sctp_paddrinfo sstat_primary;
};

/*
 * AUTHENTICATION support
 */
/* SCTP_AUTH_CHUNK */
struct sctp_authchunk {
        uint8_t sauth_chunk;
};

/* SCTP_AUTH_KEY */
struct sctp_authkey {
        sctp_assoc_t sca_assoc_id;
        uint16_t sca_keynumber;
        uint16_t sca_keylength;
        uint8_t sca_key[];
};

/* SCTP_HMAC_IDENT */
struct sctp_hmacalgo {
        uint32_t shmac_number_of_idents;
        uint16_t shmac_idents[];
};

/* AUTH hmac_id */
#define SCTP_AUTH_HMAC_ID_RSVD          0x0000
#define SCTP_AUTH_HMAC_ID_SHA1          0x0001  /* default, mandatory */
#define SCTP_AUTH_HMAC_ID_SHA256        0x0003

/* SCTP_AUTH_ACTIVE_KEY / SCTP_AUTH_DELETE_KEY */
struct sctp_authkeyid {
        sctp_assoc_t scact_assoc_id;
        uint16_t scact_keynumber;
};

/* SCTP_PEER_AUTH_CHUNKS / SCTP_LOCAL_AUTH_CHUNKS */
struct sctp_authchunks {
        sctp_assoc_t gauth_assoc_id;
        uint32_t gauth_number_of_chunks;
        uint8_t gauth_chunks[];
};

struct sctp_assoc_value {
        sctp_assoc_t assoc_id;
        uint32_t assoc_value;
};

struct sctp_cc_option {
        int option;
        struct sctp_assoc_value aid_value;
};

struct sctp_stream_value {
        sctp_assoc_t assoc_id;
        uint16_t stream_id;
        uint16_t stream_value;
};

struct sctp_assoc_ids {
        uint32_t gaids_number_of_ids;
        sctp_assoc_t gaids_assoc_id[];
};

struct sctp_sack_info {
        sctp_assoc_t sack_assoc_id;
        uint32_t sack_delay;
        uint32_t sack_freq;
};

struct sctp_timeouts {
        sctp_assoc_t stimo_assoc_id;
        uint32_t stimo_init;
        uint32_t stimo_data;
        uint32_t stimo_sack;
        uint32_t stimo_shutdown;
        uint32_t stimo_heartbeat;
        uint32_t stimo_cookie;
        uint32_t stimo_shutdownack;
};

struct sctp_udpencaps {
        struct sockaddr_storage sue_address;
        sctp_assoc_t sue_assoc_id;
        uint16_t sue_port;
};

struct sctp_prstatus {
        sctp_assoc_t sprstat_assoc_id;
        uint16_t sprstat_sid;
        uint16_t sprstat_policy;
        uint64_t sprstat_abandoned_unsent;
        uint64_t sprstat_abandoned_sent;
};

struct sctp_cwnd_args {
        struct sctp_nets *net;  /* network to *//* FIXME: LP64 issue */
        uint32_t cwnd_new_value;        /* cwnd in k */
        uint32_t pseudo_cumack;
        uint16_t inflight;      /* flightsize in k */
        uint16_t cwnd_augment;  /* increment to it */
        uint8_t meets_pseudo_cumack;
        uint8_t need_new_pseudo_cumack;
        uint8_t cnt_in_send;
        uint8_t cnt_in_str;
};

struct sctp_blk_args {
        uint32_t onsb;          /* in 1k bytes */
        uint32_t sndlen;        /* len of send being attempted */
        uint32_t peer_rwnd;     /* rwnd of peer */
        uint16_t send_sent_qcnt;        /* chnk cnt */
        uint16_t stream_qcnt;   /* chnk cnt */
        uint16_t chunks_on_oque;        /* chunks out */
        uint16_t flight_size;   /* flight size in k */
};

/*
 * Max we can reset in one setting, note this is dictated not by the define
 * but the size of a mbuf cluster so don't change this define and think you
 * can specify more. You must do multiple resets if you want to reset more
 * than SCTP_MAX_EXPLICIT_STR_RESET.
 */
#define SCTP_MAX_EXPLICT_STR_RESET   1000

struct sctp_reset_streams {
        sctp_assoc_t srs_assoc_id;
        uint16_t srs_flags;
        uint16_t srs_number_streams;    /* 0 == ALL */
        uint16_t srs_stream_list[];     /* list if strrst_num_streams is not 0 */
};

struct sctp_add_streams {
        sctp_assoc_t sas_assoc_id;
        uint16_t sas_instrms;
        uint16_t sas_outstrms;
};

struct sctp_get_nonce_values {
        sctp_assoc_t gn_assoc_id;
        uint32_t gn_peers_tag;
        uint32_t gn_local_tag;
};

/* Values for SCTP_ACCEPT_ZERO_CHECKSUM */
#define SCTP_EDMID_NONE             0
#define SCTP_EDMID_LOWER_LAYER_DTLS 1

/* Debugging logs */
struct sctp_str_log {
        void *stcb;             /* FIXME: LP64 issue */
        uint32_t n_tsn;
        uint32_t e_tsn;
        uint16_t n_sseq;
        uint16_t e_sseq;
        uint16_t strm;
};

struct sctp_sb_log {
        void *stcb;             /* FIXME: LP64 issue */
        uint32_t so_sbcc;
        uint32_t stcb_sbcc;
        uint32_t incr;
};

struct sctp_fr_log {
        uint32_t largest_tsn;
        uint32_t largest_new_tsn;
        uint32_t tsn;
};

struct sctp_fr_map {
        uint32_t base;
        uint32_t cum;
        uint32_t high;
};

struct sctp_rwnd_log {
        uint32_t rwnd;
        uint32_t send_size;
        uint32_t overhead;
        uint32_t new_rwnd;
};

struct sctp_mbcnt_log {
        uint32_t total_queue_size;
        uint32_t size_change;
        uint32_t total_queue_mb_size;
        uint32_t mbcnt_change;
};

struct sctp_sack_log {
        uint32_t cumack;
        uint32_t oldcumack;
        uint32_t tsn;
        uint16_t numGaps;
        uint16_t numDups;
};

struct sctp_lock_log {
        void *sock;             /* FIXME: LP64 issue */
        void *inp;              /* FIXME: LP64 issue */
        uint8_t tcb_lock;
        uint8_t inp_lock;
        uint8_t info_lock;
        uint8_t sock_lock;
        uint8_t sockrcvbuf_lock;
        uint8_t socksndbuf_lock;
        uint8_t create_lock;
        uint8_t resv;
};

struct sctp_rto_log {
        void *net;              /* FIXME: LP64 issue */
        uint32_t rtt;
};

struct sctp_nagle_log {
        void *stcb;             /* FIXME: LP64 issue */
        uint32_t total_flight;
        uint32_t total_in_queue;
        uint16_t count_in_queue;
        uint16_t count_in_flight;
};

struct sctp_sbwake_log {
        void *stcb;             /* FIXME: LP64 issue */
        uint16_t send_q;
        uint16_t sent_q;
        uint16_t flight;
        uint16_t wake_cnt;
        uint8_t stream_qcnt;    /* chnk cnt */
        uint8_t chunks_on_oque; /* chunks out */
        uint8_t sbflags;
        uint8_t sctpflags;
};

struct sctp_misc_info {
        uint32_t log1;
        uint32_t log2;
        uint32_t log3;
        uint32_t log4;
};

struct sctp_log_closing {
        void *inp;              /* FIXME: LP64 issue */
        void *stcb;             /* FIXME: LP64 issue */
        uint32_t sctp_flags;
        uint16_t state;
        int16_t loc;
};

struct sctp_mbuf_log {
        struct mbuf *mp;        /* FIXME: LP64 issue */
        caddr_t ext;
        caddr_t data;
        uint16_t size;
        uint8_t refcnt;
        uint8_t mbuf_flags;
};

struct sctp_cwnd_log {
        uint64_t time_event;
        uint8_t from;
        uint8_t event_type;
        uint8_t resv[2];
        union {
                struct sctp_log_closing close;
                struct sctp_blk_args blk;
                struct sctp_cwnd_args cwnd;
                struct sctp_str_log strlog;
                struct sctp_fr_log fr;
                struct sctp_fr_map map;
                struct sctp_rwnd_log rwnd;
                struct sctp_mbcnt_log mbcnt;
                struct sctp_sack_log sack;
                struct sctp_lock_log lock;
                struct sctp_rto_log rto;
                struct sctp_sb_log sb;
                struct sctp_nagle_log nagle;
                struct sctp_sbwake_log wake;
                struct sctp_mbuf_log mb;
                struct sctp_misc_info misc;
        }     x;
};

struct sctp_cwnd_log_req {
        int32_t num_in_log;     /* Number in log */
        int32_t num_ret;        /* Number returned */
        int32_t start_at;       /* start at this one */
        int32_t end_at;         /* end at this one */
        struct sctp_cwnd_log log[];
};

struct sctp_timeval {
        uint32_t tv_sec;
        uint32_t tv_usec;
};

struct sctpstat {
        struct sctp_timeval sctps_discontinuitytime;    /* sctpStats 18
                                                         * (TimeStamp) */
        /* MIB according to RFC 3873 */
        uint32_t sctps_currestab;       /* sctpStats  1   (Gauge32) */
        uint32_t sctps_activeestab;     /* sctpStats  2 (Counter32) */
        uint32_t sctps_restartestab;
        uint32_t sctps_collisionestab;
        uint32_t sctps_passiveestab;    /* sctpStats  3 (Counter32) */
        uint32_t sctps_aborted; /* sctpStats  4 (Counter32) */
        uint32_t sctps_shutdown;        /* sctpStats  5 (Counter32) */
        uint32_t sctps_outoftheblue;    /* sctpStats  6 (Counter32) */
        uint32_t sctps_checksumerrors;  /* sctpStats  7 (Counter32) */
        uint32_t sctps_outcontrolchunks;        /* sctpStats  8 (Counter64) */
        uint32_t sctps_outorderchunks;  /* sctpStats  9 (Counter64) */
        uint32_t sctps_outunorderchunks;        /* sctpStats 10 (Counter64) */
        uint32_t sctps_incontrolchunks; /* sctpStats 11 (Counter64) */
        uint32_t sctps_inorderchunks;   /* sctpStats 12 (Counter64) */
        uint32_t sctps_inunorderchunks; /* sctpStats 13 (Counter64) */
        uint32_t sctps_fragusrmsgs;     /* sctpStats 14 (Counter64) */
        uint32_t sctps_reasmusrmsgs;    /* sctpStats 15 (Counter64) */
        uint32_t sctps_outpackets;      /* sctpStats 16 (Counter64) */
        uint32_t sctps_inpackets;       /* sctpStats 17 (Counter64) */

        /* input statistics: */
        uint32_t sctps_recvpackets;     /* total input packets        */
        uint32_t sctps_recvdatagrams;   /* total input datagrams      */
        uint32_t sctps_recvpktwithdata; /* total packets that had data */
        uint32_t sctps_recvsacks;       /* total input SACK chunks    */
        uint32_t sctps_recvdata;        /* total input DATA chunks    */
        uint32_t sctps_recvdupdata;     /* total input duplicate DATA chunks */
        uint32_t sctps_recvheartbeat;   /* total input HB chunks      */
        uint32_t sctps_recvheartbeatack;        /* total input HB-ACK chunks  */
        uint32_t sctps_recvecne;        /* total input ECNE chunks    */
        uint32_t sctps_recvauth;        /* total input AUTH chunks    */
        uint32_t sctps_recvauthmissing; /* total input chunks missing AUTH */
        uint32_t sctps_recvivalhmacid;  /* total number of invalid HMAC ids
                                         * received */
        uint32_t sctps_recvivalkeyid;   /* total number of invalid secret ids
                                         * received */
        uint32_t sctps_recvauthfailed;  /* total number of auth failed */
        uint32_t sctps_recvexpress;     /* total fast path receives all one
                                         * chunk */
        uint32_t sctps_recvexpressm;    /* total fast path multi-part data */
        uint32_t sctps_recv_spare;      /* formerly sctps_recvnocrc */
        uint32_t sctps_recvswcrc;
        uint32_t sctps_recvhwcrc;

        /* output statistics: */
        uint32_t sctps_sendpackets;     /* total output packets       */
        uint32_t sctps_sendsacks;       /* total output SACKs         */
        uint32_t sctps_senddata;        /* total output DATA chunks   */
        uint32_t sctps_sendretransdata; /* total output retransmitted DATA
                                         * chunks */
        uint32_t sctps_sendfastretrans; /* total output fast retransmitted
                                         * DATA chunks */
        uint32_t sctps_sendmultfastretrans;     /* total FR's that happened
                                                 * more than once to same
                                                 * chunk (u-del multi-fr
                                                 * algo). */
        uint32_t sctps_sendheartbeat;   /* total output HB chunks     */
        uint32_t sctps_sendecne;        /* total output ECNE chunks    */
        uint32_t sctps_sendauth;        /* total output AUTH chunks FIXME   */
        uint32_t sctps_senderrors;      /* ip_output error counter */
        uint32_t sctps_send_spare;      /* formerly sctps_sendnocrc */
        uint32_t sctps_sendswcrc;
        uint32_t sctps_sendhwcrc;
        /* PCKDROPREP statistics: */
        uint32_t sctps_pdrpfmbox;       /* Packet drop from middle box */
        uint32_t sctps_pdrpfehos;       /* P-drop from end host */
        uint32_t sctps_pdrpmbda;        /* P-drops with data */
        uint32_t sctps_pdrpmbct;        /* P-drops, non-data, non-endhost */
        uint32_t sctps_pdrpbwrpt;       /* P-drop, non-endhost, bandwidth rep
                                         * only */
        uint32_t sctps_pdrpcrupt;       /* P-drop, not enough for chunk header */
        uint32_t sctps_pdrpnedat;       /* P-drop, not enough data to confirm */
        uint32_t sctps_pdrppdbrk;       /* P-drop, where process_chunk_drop
                                         * said break */
        uint32_t sctps_pdrptsnnf;       /* P-drop, could not find TSN */
        uint32_t sctps_pdrpdnfnd;       /* P-drop, attempt reverse TSN lookup */
        uint32_t sctps_pdrpdiwnp;       /* P-drop, e-host confirms zero-rwnd */
        uint32_t sctps_pdrpdizrw;       /* P-drop, midbox confirms no space */
        uint32_t sctps_pdrpbadd;        /* P-drop, data did not match TSN */
        uint32_t sctps_pdrpmark;        /* P-drop, TSN's marked for Fast
                                         * Retran */
        /* timeouts */
        uint32_t sctps_timoiterator;    /* Number of iterator timers that
                                         * fired */
        uint32_t sctps_timodata;        /* Number of T3 data time outs */
        uint32_t sctps_timowindowprobe; /* Number of window probe (T3) timers
                                         * that fired */
        uint32_t sctps_timoinit;        /* Number of INIT timers that fired */
        uint32_t sctps_timosack;        /* Number of sack timers that fired */
        uint32_t sctps_timoshutdown;    /* Number of shutdown timers that
                                         * fired */
        uint32_t sctps_timoheartbeat;   /* Number of heartbeat timers that
                                         * fired */
        uint32_t sctps_timocookie;      /* Number of times a cookie timeout
                                         * fired */
        uint32_t sctps_timosecret;      /* Number of times an endpoint changed
                                         * its cookie secret */
        uint32_t sctps_timopathmtu;     /* Number of PMTU timers that fired */
        uint32_t sctps_timoshutdownack; /* Number of shutdown ack timers that
                                         * fired */
        uint32_t sctps_timoshutdownguard;       /* Number of shutdown guard
                                                 * timers that fired */
        uint32_t sctps_timostrmrst;     /* Number of stream reset timers that
                                         * fired */
        uint32_t sctps_timoearlyfr;     /* Number of early FR timers that
                                         * fired */
        uint32_t sctps_timoasconf;      /* Number of times an asconf timer
                                         * fired */
        uint32_t sctps_timodelprim;     /* Number of times a prim_deleted
                                         * timer fired */
        uint32_t sctps_timoautoclose;   /* Number of times auto close timer
                                         * fired */
        uint32_t sctps_timoassockill;   /* Number of asoc free timers expired */
        uint32_t sctps_timoinpkill;     /* Number of inp free timers expired */
        /* former early FR counters */
        uint32_t sctps_spare[11];
        /* others */
        uint32_t sctps_hdrops;  /* packet shorter than header */
        uint32_t sctps_badsum;  /* checksum error             */
        uint32_t sctps_noport;  /* no endpoint for port       */
        uint32_t sctps_badvtag; /* bad v-tag                  */
        uint32_t sctps_badsid;  /* bad SID                    */
        uint32_t sctps_nomem;   /* no memory                  */
        uint32_t sctps_fastretransinrtt;        /* number of multiple FR in a
                                                 * RTT window */
        uint32_t sctps_markedretrans;
        uint32_t sctps_naglesent;       /* nagle allowed sending      */
        uint32_t sctps_naglequeued;     /* nagle doesn't allow sending */
        uint32_t sctps_maxburstqueued;  /* max burst doesn't allow sending */
        uint32_t sctps_ifnomemqueued;   /* look ahead tells us no memory in
                                         * interface ring buffer OR we had a
                                         * send error and are queuing one
                                         * send. */
        uint32_t sctps_windowprobed;    /* total number of window probes sent */
        uint32_t sctps_lowlevelerr;     /* total times an output error causes
                                         * us to clamp down on next user send. */
        uint32_t sctps_lowlevelerrusr;  /* total times sctp_senderrors were
                                         * caused from a user send from a user
                                         * invoked send not a sack response */
        uint32_t sctps_datadropchklmt;  /* Number of in data drops due to
                                         * chunk limit reached */
        uint32_t sctps_datadroprwnd;    /* Number of in data drops due to rwnd
                                         * limit reached */
        uint32_t sctps_ecnereducedcwnd; /* Number of times a ECN reduced the
                                         * cwnd */
        uint32_t sctps_vtagexpress;     /* Used express lookup via vtag */
        uint32_t sctps_vtagbogus;       /* Collision in express lookup. */
        uint32_t sctps_primary_randry;  /* Number of times the sender ran dry
                                         * of user data on primary */
        uint32_t sctps_cmt_randry;      /* Same for above */
        uint32_t sctps_slowpath_sack;   /* Sacks the slow way */
        uint32_t sctps_wu_sacks_sent;   /* Window Update only sacks sent */
        uint32_t sctps_sends_with_flags;        /* number of sends with
                                                 * sinfo_flags !=0 */
        uint32_t sctps_sends_with_unord;        /* number of unordered sends */
        uint32_t sctps_sends_with_eof;  /* number of sends with EOF flag set */
        uint32_t sctps_sends_with_abort;        /* number of sends with ABORT
                                                 * flag set */
        uint32_t sctps_protocol_drain_calls;    /* number of times protocol
                                                 * drain called */
        uint32_t sctps_protocol_drains_done;    /* number of times we did a
                                                 * protocol drain */
        uint32_t sctps_read_peeks;      /* Number of times recv was called
                                         * with peek */
        uint32_t sctps_cached_chk;      /* Number of cached chunks used */
        uint32_t sctps_cached_strmoq;   /* Number of cached stream oq's used */
        uint32_t sctps_left_abandon;    /* Number of unread messages abandoned
                                         * by close */
        uint32_t sctps_send_burst_avoid;        /* Unused */
        uint32_t sctps_send_cwnd_avoid; /* Send cwnd full  avoidance, already
                                         * max burst inflight to net */
        uint32_t sctps_fwdtsn_map_over; /* number of map array over-runs via
                                         * fwd-tsn's */
        uint32_t sctps_queue_upd_ecne;  /* Number of times we queued or
                                         * updated an ECN chunk on send queue */
        uint32_t sctps_recvzerocrc;     /* Number of accepted packets with
                                         * zero CRC */
        uint32_t sctps_sendzerocrc;     /* Number of packets sent with zero
                                         * CRC */
        uint32_t sctps_reserved[29];    /* Future ABI compat - remove int's
                                         * from here when adding new */
};

#define SCTP_STAT_INCR(_x) SCTP_STAT_INCR_BY(_x,1)
#define SCTP_STAT_DECR(_x) SCTP_STAT_DECR_BY(_x,1)
#if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
#define SCTP_STAT_INCR_BY(_x,_d) (SCTP_BASE_STATS[PCPU_GET(cpuid)]._x += _d)
#define SCTP_STAT_DECR_BY(_x,_d) (SCTP_BASE_STATS[PCPU_GET(cpuid)]._x -= _d)
#else
#define SCTP_STAT_INCR_BY(_x,_d) atomic_add_int(&SCTP_BASE_STAT(_x), _d)
#define SCTP_STAT_DECR_BY(_x,_d) atomic_subtract_int(&SCTP_BASE_STAT(_x), _d)
#endif
/* The following macros are for handling MIB values, */
#define SCTP_STAT_INCR_COUNTER32(_x) SCTP_STAT_INCR(_x)
#define SCTP_STAT_INCR_COUNTER64(_x) SCTP_STAT_INCR(_x)
#define SCTP_STAT_INCR_GAUGE32(_x) SCTP_STAT_INCR(_x)
#define SCTP_STAT_DECR_COUNTER32(_x) SCTP_STAT_DECR(_x)
#define SCTP_STAT_DECR_COUNTER64(_x) SCTP_STAT_DECR(_x)
#define SCTP_STAT_DECR_GAUGE32(_x) SCTP_STAT_DECR(_x)

/***********************************/
/* And something for us old timers */
/***********************************/

#ifndef ntohll
#include <sys/endian.h>
#define ntohll(x) be64toh(x)
#endif

#ifndef htonll
#include <sys/endian.h>
#define htonll(x) htobe64(x)
#endif
/***********************************/

struct xsctp_inpcb {
        uint32_t last;
        uint32_t flags;
        uint64_t features;
        uint32_t total_sends;
        uint32_t total_recvs;
        uint32_t total_nospaces;
        uint32_t fragmentation_point;
        uint16_t local_port;
        uint16_t qlen_old;
        uint16_t maxqlen_old;
        uint16_t __spare16;
        kvaddr_t socket;
        uint32_t qlen;
        uint32_t maxqlen;
        uint32_t extra_padding[26];     /* future */
};

struct xsctp_tcb {
        union sctp_sockstore primary_addr;      /* sctpAssocEntry 5/6 */
        uint32_t last;
        uint32_t heartbeat_interval;    /* sctpAssocEntry 7   */
        uint32_t state;         /* sctpAssocEntry 8   */
        uint32_t in_streams;    /* sctpAssocEntry 9   */
        uint32_t out_streams;   /* sctpAssocEntry 10  */
        uint32_t max_nr_retrans;        /* sctpAssocEntry 11  */
        uint32_t primary_process;       /* sctpAssocEntry 12  */
        uint32_t T1_expireries; /* sctpAssocEntry 13  */
        uint32_t T2_expireries; /* sctpAssocEntry 14  */
        uint32_t retransmitted_tsns;    /* sctpAssocEntry 15  */
        uint32_t total_sends;
        uint32_t total_recvs;
        uint32_t local_tag;
        uint32_t remote_tag;
        uint32_t initial_tsn;
        uint32_t highest_tsn;
        uint32_t cumulative_tsn;
        uint32_t cumulative_tsn_ack;
        uint32_t mtu;
        uint32_t refcnt;
        uint16_t local_port;    /* sctpAssocEntry 3   */
        uint16_t remote_port;   /* sctpAssocEntry 4   */
        struct sctp_timeval start_time; /* sctpAssocEntry 16  */
        struct sctp_timeval discontinuity_time; /* sctpAssocEntry 17  */
        uint32_t peers_rwnd;
        sctp_assoc_t assoc_id;  /* sctpAssocEntry 1   */
        uint32_t extra_padding[32];     /* future */
};

struct xsctp_laddr {
        union sctp_sockstore address;   /* sctpAssocLocalAddrEntry 1/2 */
        uint32_t last;
        struct sctp_timeval start_time; /* sctpAssocLocalAddrEntry 3   */
        uint32_t extra_padding[32];     /* future */
};

struct xsctp_raddr {
        union sctp_sockstore address;   /* sctpAssocLocalRemEntry 1/2 */
        uint32_t last;
        uint32_t rto;           /* sctpAssocLocalRemEntry 5   */
        uint32_t max_path_rtx;  /* sctpAssocLocalRemEntry 6   */
        uint32_t rtx;           /* sctpAssocLocalRemEntry 7   */
        uint32_t error_counter; /* */
        uint32_t cwnd;          /* */
        uint32_t flight_size;   /* */
        uint32_t mtu;           /* */
        uint8_t active;         /* sctpAssocLocalRemEntry 3   */
        uint8_t confirmed;      /* */
        uint8_t heartbeat_enabled;      /* sctpAssocLocalRemEntry 4   */
        uint8_t potentially_failed;
        struct sctp_timeval start_time; /* sctpAssocLocalRemEntry 8   */
        uint32_t rtt;
        uint32_t heartbeat_interval;
        uint32_t ssthresh;
        uint16_t encaps_port;
        uint16_t state;
        uint32_t extra_padding[29];     /* future */
};

#define SCTP_MAX_LOGGING_SIZE 30000
#define SCTP_TRACE_PARAMS 6     /* This number MUST be even   */

struct sctp_log_entry {
        uint64_t timestamp;
        uint32_t subsys;
        uint32_t padding;
        uint32_t params[SCTP_TRACE_PARAMS];
};

struct sctp_log {
        struct sctp_log_entry entry[SCTP_MAX_LOGGING_SIZE];
        uint32_t index;
        uint32_t padding;
};

/*
 * Kernel defined for sctp_send
 */
#if defined(_KERNEL) || defined(__Userspace__)
int
sctp_lower_sosend(struct socket *so,
    struct sockaddr *addr,
    struct uio *uio,
    struct mbuf *top,
    struct mbuf *control,
    int flags,
    struct sctp_sndrcvinfo *srcv
    ,struct thread *p
);

int
sctp_sorecvmsg(struct socket *so,
    struct uio *uio,
    struct mbuf **mp,
    struct sockaddr *from,
    int fromlen,
    int *msg_flags,
    struct sctp_sndrcvinfo *sinfo,
    int filling_sinfo);
#endif

/*
 * API system calls
 */
#if !(defined(_KERNEL)) && !(defined(__Userspace__))

__BEGIN_DECLS
int sctp_peeloff(int, sctp_assoc_t);
int sctp_bindx(int, struct sockaddr *, int, int);
int sctp_connectx(int, const struct sockaddr *, int, sctp_assoc_t *);
int sctp_getaddrlen(sa_family_t);
int sctp_getpaddrs(int, sctp_assoc_t, struct sockaddr **);
void sctp_freepaddrs(struct sockaddr *);
int sctp_getladdrs(int, sctp_assoc_t, struct sockaddr **);
void sctp_freeladdrs(struct sockaddr *);
int sctp_opt_info(int, sctp_assoc_t, int, void *, socklen_t *);

/* deprecated */
ssize_t
sctp_sendmsg(int, const void *, size_t, const struct sockaddr *,
    socklen_t, uint32_t, uint32_t, uint16_t, uint32_t, uint32_t);

/* deprecated */
ssize_t
sctp_send(int, const void *, size_t,
    const struct sctp_sndrcvinfo *, int);

/* deprecated */
ssize_t
sctp_sendx(int, const void *, size_t, struct sockaddr *,
    int, struct sctp_sndrcvinfo *, int);

/* deprecated */
ssize_t
sctp_sendmsgx(int sd, const void *, size_t, struct sockaddr *,
    int, uint32_t, uint32_t, uint16_t, uint32_t, uint32_t);

sctp_assoc_t sctp_getassocid(int, struct sockaddr *);

/* deprecated */
ssize_t
sctp_recvmsg(int, void *, size_t, struct sockaddr *, socklen_t *,
    struct sctp_sndrcvinfo *, int *);

ssize_t
sctp_sendv(int, const struct iovec *, int, struct sockaddr *,
    int, void *, socklen_t, unsigned int, int);

ssize_t
sctp_recvv(int, const struct iovec *, int, struct sockaddr *,
    socklen_t *, void *, socklen_t *, unsigned int *, int *);

__END_DECLS

#endif                          /* !_KERNEL */
#endif                          /* !__sctp_uio_h__ */