/*	$KAME: sctp.h,v 1.18 2005/03/06 16:04:16 itojun Exp $	*/
/*	$NetBSD: sctp.h,v 1.7 2025/02/28 09:07:12 andvar Exp $ */

#ifndef _NETINET_SCTP_H_
#define _NETINET_SCTP_H_

/*
 * Copyright (c) 2001, 2002, 2003, 2004 Cisco Systems, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Cisco Systems, Inc.
 * 4. Neither the name of the project 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 CISCO SYSTEMS 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 CISCO SYSTEMS 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.
 */
#include <sys/types.h>

/*
 * SCTP protocol - RFC2960.
 */

struct sctphdr {
	u_int16_t src_port;		/* source port */
	u_int16_t dest_port;		/* destination port */
	u_int32_t v_tag;		/* verification tag of packet */
	u_int32_t checksum;		/* Adler32 C-Sum */
	/* chunks follow... */
} __packed;

/*
 * SCTP Chunks
 */
struct sctp_chunkhdr {
	u_int8_t  chunk_type;		/* chunk type */
	u_int8_t  chunk_flags;		/* chunk flags */
	u_int16_t chunk_length;		/* chunk length */
	/* optional params follow */
} __packed;

/*
 * SCTP chunk parameters
 */
struct sctp_paramhdr {
	u_int16_t param_type;		/* parameter type */
	u_int16_t param_length;		/* parameter length */
} __packed;

/*
 * user socket options
 */
/* read-write options */
#define SCTP_NODELAY			0x00000001
#define SCTP_MAXSEG			0x00000002
#define SCTP_ASSOCINFO			0x00000003

#define SCTP_INITMSG			0x00000004
#define SCTP_AUTOCLOSE			0x00000005
#define SCTP_SET_PEER_PRIMARY_ADDR	0x00000006
#define SCTP_PRIMARY_ADDR		0x00000007

/* read-only options */
#define SCTP_STATUS			0x00000008
#define SCTP_PCB_STATUS			0x00000009

/* ancillary data/notification interest options */
#define SCTP_EVENTS			0x0000000a
/* sctp_opt_info params */
#define SCTP_PEER_ADDR_PARAMS 		0x0000000b
#define SCTP_GET_PEER_ADDR_INFO		0x0000000c
/* Hidden socket option that gets the addresses */
#define SCTP_GET_PEER_ADDRESSES		0x0000000d
#define SCTP_GET_LOCAL_ADDRESSES	0x0000000e
/*
 * Blocking I/O is enabled on any TCP type socket by default.
 * For the UDP model if this is turned on then the socket buffer is
 * shared for send resources amongst all associations. The default
 * for the UDP model is that is SS_NBIO is set. Which means all associations
 * have a separate send limit BUT they will NOT ever BLOCK instead
 * you will get an error back EAGAIN if you try to send too much. If
 * you want the blocking symantics you set this option at the cost
 * of sharing one socket send buffer size amongst all associations.
 * Peeled off sockets turn this option off and block... but since both TCP and
 * peeled off sockets have only one assoc per socket this is fine.
 * It probably does NOT make sense to set this  on SS_NBIO on a TCP model OR
 * peeled off UDP model, but we do allow you to do so. You just use
 * the normal syscall to toggle SS_NBIO the way you want.
 */
/* Blocking I/O is controlled by the SS_NBIO flag on the
 * socket state so_state field.
 */
#define SCTP_GET_SNDBUF_USE		0x0000000f
/* latter added read/write */
#define SCTP_ADAPTION_LAYER		0x00000010
#define SCTP_DISABLE_FRAGMENTS		0x00000011
/* sctp_bindx() flags as socket options */
#define SCTP_BINDX_ADD_ADDR		0x00000012
#define SCTP_BINDX_REM_ADDR		0x00000013
/* return the total count in bytes needed to hold all local addresses bound */
#define SCTP_GET_LOCAL_ADDR_SIZE	0x00000014
/* Without this applied we will give V4 and V6 addresses on a V6 socket */
#define SCTP_I_WANT_MAPPED_V4_ADDR	0x00000015
/* Return the total count in bytes needed to hold the remote address */
#define SCTP_GET_REMOTE_ADDR_SIZE	0x00000016
#define SCTP_GET_PEGS			0x00000017
#define SCTP_DEFAULT_SEND_PARAM		0x00000018
#define SCTP_SET_DEBUG_LEVEL		0x00000019
#define SCTP_RTOINFO			0x0000001a
#define SCTP_AUTO_ASCONF		0x0000001b
#define SCTP_MAXBURST			0x0000001c
#define SCTP_GET_STAT_LOG		0x0000001d
#define SCTP_CONNECT_X			0x0000001e	/* hidden opt for connectx */
#define SCTP_RESET_STREAMS		0x0000001f
#define SCTP_CONNECT_X_DELAYED		0x00000020	/* hidden opt for connectx_delayed
							 * part of sctp_sendx()
							 */
#define SCTP_CONNECT_X_COMPLETE         0x00000021
#define SCTP_GET_ASOC_ID_LIST           0x00000022

/* Other BSD items */
#define SCTP_GET_NONCE_VALUES           0x00000023
#define SCTP_DELAYED_ACK_TIME           0x00000024

/* Things for the AUTH draft possibly */
#define SCTP_PEER_PUBLIC_KEY            0x00000100 /* get the peers public key */
#define SCTP_MY_PUBLIC_KEY              0x00000101 /* get/set my endpoints public key */
#define SCTP_SET_AUTH_SECRET            0x00000102 /* get/set my shared secret */
#define SCTP_SET_AUTH_CHUNKS            0x00000103 /* specify what chunks you want
						     * the system may have additional requirements
						     * as well. I.e. probably ASCONF/ASCONF-ACK no matter
						     * if you want it or not.
						     */
/* Debug things that need to be purged */
#define SCTP_SET_INITIAL_DBG_SEQ	0x00001f00
#define SCTP_RESET_PEGS                 0x00002000
#define SCTP_CLR_STAT_LOG               0x00002100

/*
 * user state values
 */
#define SCTP_CLOSED			0x0000
#define SCTP_BOUND			0x1000
#define SCTP_LISTEN			0x2000
#define SCTP_COOKIE_WAIT		0x0002
#define SCTP_COOKIE_ECHOED		0x0004
#define SCTP_ESTABLISHED		0x0008
#define SCTP_SHUTDOWN_SENT		0x0010
#define SCTP_SHUTDOWN_RECEIVED		0x0020
#define SCTP_SHUTDOWN_ACK_SENT		0x0040
#define SCTP_SHUTDOWN_PENDING		0x0080

/*
 * SCTP operational error codes (user visible)
 */
#define SCTP_ERROR_NO_ERROR		0x0000
#define SCTP_ERROR_INVALID_STREAM	0x0001
#define SCTP_ERROR_MISSING_PARAM	0x0002
#define SCTP_ERROR_STALE_COOKIE		0x0003
#define SCTP_ERROR_OUT_OF_RESOURCES	0x0004
#define SCTP_ERROR_UNRESOLVABLE_ADDR	0x0005
#define SCTP_ERROR_UNRECOG_CHUNK	0x0006
#define SCTP_ERROR_INVALID_PARAM	0x0007
#define SCTP_ERROR_UNRECOG_PARAM	0x0008
#define SCTP_ERROR_NO_USER_DATA		0x0009
#define SCTP_ERROR_COOKIE_IN_SHUTDOWN	0x000a
/* draft-ietf-tsvwg-sctpimpguide */
#define SCTP_ERROR_RESTART_NEWADDRS	0x000b
/* draft-ietf-tsvwg-addip-sctp */
#define SCTP_ERROR_DELETE_LAST_ADDR	0x0100
#define SCTP_ERROR_RESOURCE_SHORTAGE	0x0101
#define SCTP_ERROR_DELETE_SOURCE_ADDR	0x0102
#define SCTP_ERROR_ILLEGAL_ASCONF_ACK	0x0103

/*
 * error cause parameters (user visible)
 */
struct sctp_error_cause {
	u_int16_t code;
	u_int16_t length;
	/* optional cause-specific info may follow */
} __packed;

struct sctp_error_invalid_stream {
	struct sctp_error_cause cause;	/* code=SCTP_ERROR_INVALID_STREAM */
	u_int16_t stream_id;		/* stream id of the DATA in error */
	u_int16_t reserved;
} __packed;

struct sctp_error_missing_param {
	struct sctp_error_cause cause;	/* code=SCTP_ERROR_MISSING_PARAM */
	u_int32_t num_missing_params;	/* number of missing parameters */
	/* u_int16_t param_type's follow */
} __packed;

struct sctp_error_stale_cookie {
	struct sctp_error_cause cause;	/* code=SCTP_ERROR_STALE_COOKIE */
	u_int32_t stale_time;		/* time in usec of staleness */
} __packed;

struct sctp_error_out_of_resource {
	struct sctp_error_cause cause;	/* code=SCTP_ERROR_OUT_OF_RESOURCES */
} __packed;

struct sctp_error_unresolv_addr {
	struct sctp_error_cause cause;	/* code=SCTP_ERROR_UNRESOLVABLE_ADDR */

} __packed;

struct sctp_error_unrecognized_chunk {
	struct sctp_error_cause cause;	/* code=SCTP_ERROR_UNRECOG_CHUNK */
	struct sctp_chunkhdr ch;	/* header from chunk in error */
} __packed;

#define HAVE_SCTP			1
#define HAVE_KERNEL_SCTP		1
#define HAVE_SCTP_PRSCTP		1
#define HAVE_SCTP_ADDIP			1
#define HAVE_SCTP_CANSET_PRIMARY	1
#define HAVE_SCTP_SAT_NETWORK_CAPABILITY1
#define HAVE_SCTP_MULTIBUF              1
#define HAVE_SCTP_NOCONNECT             0
#define HAVE_SCTP_ECN_NONCE             1  /* ECN Nonce option */

/* Main SCTP chunk types, we place
 * these here since that way natd and f/w's
 * in user land can find them.
 */
#define SCTP_DATA		0x00
#define SCTP_INITIATION		0x01
#define SCTP_INITIATION_ACK	0x02
#define SCTP_SELECTIVE_ACK	0x03
#define SCTP_HEARTBEAT_REQUEST	0x04
#define SCTP_HEARTBEAT_ACK	0x05
#define SCTP_ABORT_ASSOCIATION	0x06
#define SCTP_SHUTDOWN		0x07
#define SCTP_SHUTDOWN_ACK	0x08
#define SCTP_OPERATION_ERROR	0x09
#define SCTP_COOKIE_ECHO	0x0a
#define SCTP_COOKIE_ACK		0x0b
#define SCTP_ECN_ECHO		0x0c
#define SCTP_ECN_CWR		0x0d
#define SCTP_SHUTDOWN_COMPLETE	0x0e

/* draft-ietf-tsvwg-addip-sctp */
#define SCTP_ASCONF		0xc1
#define	SCTP_ASCONF_ACK		0x80

/* draft-ietf-stewart-prsctp */
#define SCTP_FORWARD_CUM_TSN	0xc0

/* draft-ietf-stewart-pktdrpsctp */
#define SCTP_PACKET_DROPPED	0x81

/* draft-ietf-stewart-strreset-xxx */
#define SCTP_STREAM_RESET       0x82

/* ABORT and SHUTDOWN COMPLETE FLAG */
#define SCTP_HAD_NO_TCB		0x01

/* Packet dropped flags */
#define SCTP_FROM_MIDDLE_BOX	SCTP_HAD_NO_TCB
#define SCTP_BADCRC		0x02
#define SCTP_PACKET_TRUNCATED	0x04

#define SCTP_SAT_NETWORK_MIN	     400	/* min ms for RTT to set satellite time */
#define SCTP_SAT_NETWORK_BURST_INCR  2		/* how many times to multiply maxburst in sat */
/* Data Chunk Specific Flags */
#define SCTP_DATA_FRAG_MASK	0x03
#define SCTP_DATA_MIDDLE_FRAG	0x00
#define SCTP_DATA_LAST_FRAG	0x01
#define SCTP_DATA_FIRST_FRAG	0x02
#define SCTP_DATA_NOT_FRAG	0x03
#define SCTP_DATA_UNORDERED	0x04

/* ECN Nonce: SACK Chunk Specific Flags */
#define SCTP_SACK_NONCE_SUM     0x01

#include <netinet/sctp_uio.h>

#endif /* !_NETINET_SCTP_H_ */