path: root/contrib/libs/linux-headers/linux/sctp.h

/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ 
/* SCTP kernel implementation 
 * (C) Copyright IBM Corp. 2001, 2004 
 * Copyright (c) 1999-2000 Cisco, Inc. 
 * Copyright (c) 1999-2001 Motorola, Inc. 
 * Copyright (c) 2002 Intel Corp. 
 * 
 * This file is part of the SCTP kernel implementation 
 * 
 * This header represents the structures and constants needed to support 
 * the SCTP Extension to the Sockets API. 
 * 
 * This SCTP implementation is free software; 
 * you can redistribute it and/or modify it under the terms of 
 * the GNU General Public License as published by 
 * the Free Software Foundation; either version 2, or (at your option) 
 * any later version. 
 * 
 * This SCTP implementation is distributed in the hope that it 
 * will be useful, but WITHOUT ANY WARRANTY; without even the implied 
 *                 ************************ 
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 
 * See the GNU General Public License for more details. 
 * 
 * You should have received a copy of the GNU General Public License 
 * along with GNU CC; see the file COPYING.  If not, see 
 * <http://www.gnu.org/licenses/>. 
 * 
 * Please send any bug reports or fixes you make to the 
 * email address(es): 
 *    lksctp developers <linux-sctp@vger.kernel.org> 
 * 
 * Or submit a bug report through the following website: 
 *    http://www.sf.net/projects/lksctp 
 * 
 * Written or modified by: 
 *    La Monte H.P. Yarroll    <piggy@acm.org> 
 *    R. Stewart               <randall@sctp.chicago.il.us> 
 *    K. Morneau               <kmorneau@cisco.com> 
 *    Q. Xie                   <qxie1@email.mot.com> 
 *    Karl Knutson             <karl@athena.chicago.il.us> 
 *    Jon Grimm                <jgrimm@us.ibm.com> 
 *    Daisy Chang              <daisyc@us.ibm.com> 
 *    Ryan Layer               <rmlayer@us.ibm.com> 
 *    Ardelle Fan              <ardelle.fan@intel.com> 
 *    Sridhar Samudrala        <sri@us.ibm.com> 
 *    Inaky Perez-Gonzalez     <inaky.gonzalez@intel.com> 
 *    Vlad Yasevich            <vladislav.yasevich@hp.com> 
 * 
 * Any bugs reported given to us we will try to fix... any fixes shared will 
 * be incorporated into the next SCTP release. 
 */ 
 
#ifndef _SCTP_H 
#define _SCTP_H 
 
#include <linux/types.h> 
#include <linux/socket.h> 
 
typedef __s32 sctp_assoc_t; 
 
#define SCTP_FUTURE_ASSOC	0 
#define SCTP_CURRENT_ASSOC	1 
#define SCTP_ALL_ASSOC		2 
 
/* The following symbols come from the Sockets API Extensions for 
 * SCTP <draft-ietf-tsvwg-sctpsocket-07.txt>. 
 */ 
#define SCTP_RTOINFO	0 
#define SCTP_ASSOCINFO  1 
#define SCTP_INITMSG	2 
#define SCTP_NODELAY	3		/* Get/set nodelay option. */ 
#define SCTP_AUTOCLOSE	4 
#define SCTP_SET_PEER_PRIMARY_ADDR 5 
#define SCTP_PRIMARY_ADDR	6 
#define SCTP_ADAPTATION_LAYER	7 
#define SCTP_DISABLE_FRAGMENTS	8 
#define SCTP_PEER_ADDR_PARAMS	9 
#define SCTP_DEFAULT_SEND_PARAM	10 
#define SCTP_EVENTS	11 
#define SCTP_I_WANT_MAPPED_V4_ADDR 12	/* Turn on/off mapped v4 addresses  */ 
#define SCTP_MAXSEG	13		/* Get/set maximum fragment. */ 
#define SCTP_STATUS	14 
#define SCTP_GET_PEER_ADDR_INFO	15 
#define SCTP_DELAYED_ACK_TIME	16 
#define SCTP_DELAYED_ACK SCTP_DELAYED_ACK_TIME 
#define SCTP_DELAYED_SACK SCTP_DELAYED_ACK_TIME 
#define SCTP_CONTEXT	17 
#define SCTP_FRAGMENT_INTERLEAVE	18 
#define SCTP_PARTIAL_DELIVERY_POINT	19 /* Set/Get partial delivery point */ 
#define SCTP_MAX_BURST	20		/* Set/Get max burst */ 
#define SCTP_AUTH_CHUNK	21	/* Set only: add a chunk type to authenticate */ 
#define SCTP_HMAC_IDENT	22 
#define SCTP_AUTH_KEY	23 
#define SCTP_AUTH_ACTIVE_KEY	24 
#define SCTP_AUTH_DELETE_KEY	25 
#define SCTP_PEER_AUTH_CHUNKS	26	/* Read only */ 
#define SCTP_LOCAL_AUTH_CHUNKS	27	/* Read only */ 
#define SCTP_GET_ASSOC_NUMBER	28	/* Read only */ 
#define SCTP_GET_ASSOC_ID_LIST	29	/* Read only */ 
#define SCTP_AUTO_ASCONF       30 
#define SCTP_PEER_ADDR_THLDS	31 
#define SCTP_RECVRCVINFO	32 
#define SCTP_RECVNXTINFO	33 
#define SCTP_DEFAULT_SNDINFO	34 
#define SCTP_AUTH_DEACTIVATE_KEY	35 
#define SCTP_REUSE_PORT		36 
#define SCTP_PEER_ADDR_THLDS_V2	37 
 
/* Internal Socket Options. Some of the sctp library functions are 
 * implemented using these socket options. 
 */ 
#define SCTP_SOCKOPT_BINDX_ADD	100	/* BINDX requests for adding addrs */ 
#define SCTP_SOCKOPT_BINDX_REM	101	/* BINDX requests for removing addrs. */ 
#define SCTP_SOCKOPT_PEELOFF	102	/* peel off association. */ 
/* Options 104-106 are deprecated and removed. Do not use this space */ 
#define SCTP_SOCKOPT_CONNECTX_OLD	107	/* CONNECTX old requests. */ 
#define SCTP_GET_PEER_ADDRS	108		/* Get all peer address. */ 
#define SCTP_GET_LOCAL_ADDRS	109		/* Get all local address. */ 
#define SCTP_SOCKOPT_CONNECTX	110		/* CONNECTX requests. */ 
#define SCTP_SOCKOPT_CONNECTX3	111	/* CONNECTX requests (updated) */ 
#define SCTP_GET_ASSOC_STATS	112	/* Read only */ 
#define SCTP_PR_SUPPORTED	113 
#define SCTP_DEFAULT_PRINFO	114 
#define SCTP_PR_ASSOC_STATUS	115 
#define SCTP_PR_STREAM_STATUS	116 
#define SCTP_RECONFIG_SUPPORTED	117 
#define SCTP_ENABLE_STREAM_RESET	118 
#define SCTP_RESET_STREAMS	119 
#define SCTP_RESET_ASSOC	120 
#define SCTP_ADD_STREAMS	121 
#define SCTP_SOCKOPT_PEELOFF_FLAGS 122 
#define SCTP_STREAM_SCHEDULER	123 
#define SCTP_STREAM_SCHEDULER_VALUE	124 
#define SCTP_INTERLEAVING_SUPPORTED	125 
#define SCTP_SENDMSG_CONNECT	126 
#define SCTP_EVENT	127 
#define SCTP_ASCONF_SUPPORTED	128 
#define SCTP_AUTH_SUPPORTED	129 
#define SCTP_ECN_SUPPORTED	130 
#define SCTP_EXPOSE_POTENTIALLY_FAILED_STATE	131 
#define SCTP_EXPOSE_PF_STATE	SCTP_EXPOSE_POTENTIALLY_FAILED_STATE 
 
/* PR-SCTP policies */ 
#define SCTP_PR_SCTP_NONE	0x0000 
#define SCTP_PR_SCTP_TTL	0x0010 
#define SCTP_PR_SCTP_RTX	0x0020 
#define SCTP_PR_SCTP_PRIO	0x0030 
#define SCTP_PR_SCTP_MAX	SCTP_PR_SCTP_PRIO 
#define SCTP_PR_SCTP_MASK	0x0030 
 
#define __SCTP_PR_INDEX(x)	((x >> 4) - 1) 
#define SCTP_PR_INDEX(x)	__SCTP_PR_INDEX(SCTP_PR_SCTP_ ## x) 
 
#define SCTP_PR_POLICY(x)	((x) & SCTP_PR_SCTP_MASK) 
#define SCTP_PR_SET_POLICY(flags, x)	\ 
	do {				\ 
		flags &= ~SCTP_PR_SCTP_MASK;	\ 
		flags |= x;		\ 
	} while (0) 
 
#define SCTP_PR_TTL_ENABLED(x)	(SCTP_PR_POLICY(x) == SCTP_PR_SCTP_TTL) 
#define SCTP_PR_RTX_ENABLED(x)	(SCTP_PR_POLICY(x) == SCTP_PR_SCTP_RTX) 
#define SCTP_PR_PRIO_ENABLED(x)	(SCTP_PR_POLICY(x) == SCTP_PR_SCTP_PRIO) 
 
/* For enable stream reset */ 
#define SCTP_ENABLE_RESET_STREAM_REQ	0x01 
#define SCTP_ENABLE_RESET_ASSOC_REQ	0x02 
#define SCTP_ENABLE_CHANGE_ASSOC_REQ	0x04 
#define SCTP_ENABLE_STRRESET_MASK	0x07 
 
#define SCTP_STREAM_RESET_INCOMING	0x01 
#define SCTP_STREAM_RESET_OUTGOING	0x02 
 
/* These are bit fields for msghdr->msg_flags.  See section 5.1.  */ 
/* On user space Linux, these live in <bits/socket.h> as an enum.  */ 
enum sctp_msg_flags { 
	MSG_NOTIFICATION = 0x8000, 
#define MSG_NOTIFICATION MSG_NOTIFICATION 
}; 
 
/* 5.3.1 SCTP Initiation Structure (SCTP_INIT) 
 * 
 *   This cmsghdr structure provides information for initializing new 
 *   SCTP associations with sendmsg().  The SCTP_INITMSG socket option 
 *   uses this same data structure.  This structure is not used for 
 *   recvmsg(). 
 * 
 *   cmsg_level    cmsg_type      cmsg_data[] 
 *   ------------  ------------   ---------------------- 
 *   IPPROTO_SCTP  SCTP_INIT      struct sctp_initmsg 
 */ 
struct sctp_initmsg { 
	__u16 sinit_num_ostreams; 
	__u16 sinit_max_instreams; 
	__u16 sinit_max_attempts; 
	__u16 sinit_max_init_timeo; 
}; 
 
/* 5.3.2 SCTP Header Information Structure (SCTP_SNDRCV) 
 * 
 *   This cmsghdr structure specifies SCTP options for sendmsg() and 
 *   describes SCTP header information about a received message through 
 *   recvmsg(). 
 * 
 *   cmsg_level    cmsg_type      cmsg_data[] 
 *   ------------  ------------   ---------------------- 
 *   IPPROTO_SCTP  SCTP_SNDRCV    struct sctp_sndrcvinfo 
 */ 
struct sctp_sndrcvinfo { 
	__u16 sinfo_stream; 
	__u16 sinfo_ssn; 
	__u16 sinfo_flags; 
	__u32 sinfo_ppid; 
	__u32 sinfo_context; 
	__u32 sinfo_timetolive; 
	__u32 sinfo_tsn; 
	__u32 sinfo_cumtsn; 
	sctp_assoc_t sinfo_assoc_id; 
}; 
 
/* 5.3.4 SCTP Send Information Structure (SCTP_SNDINFO) 
 * 
 *   This cmsghdr structure specifies SCTP options for sendmsg(). 
 * 
 *   cmsg_level    cmsg_type      cmsg_data[] 
 *   ------------  ------------   ------------------- 
 *   IPPROTO_SCTP  SCTP_SNDINFO   struct sctp_sndinfo 
 */ 
struct sctp_sndinfo { 
	__u16 snd_sid; 
	__u16 snd_flags; 
	__u32 snd_ppid; 
	__u32 snd_context; 
	sctp_assoc_t snd_assoc_id; 
}; 
 
/* 5.3.5 SCTP Receive Information Structure (SCTP_RCVINFO) 
 * 
 *   This cmsghdr structure describes SCTP receive information 
 *   about a received message through recvmsg(). 
 * 
 *   cmsg_level    cmsg_type      cmsg_data[] 
 *   ------------  ------------   ------------------- 
 *   IPPROTO_SCTP  SCTP_RCVINFO   struct sctp_rcvinfo 
 */ 
struct sctp_rcvinfo { 
	__u16 rcv_sid; 
	__u16 rcv_ssn; 
	__u16 rcv_flags; 
	__u32 rcv_ppid; 
	__u32 rcv_tsn; 
	__u32 rcv_cumtsn; 
	__u32 rcv_context; 
	sctp_assoc_t rcv_assoc_id; 
}; 
 
/* 5.3.6 SCTP Next Receive Information Structure (SCTP_NXTINFO) 
 * 
 *   This cmsghdr structure describes SCTP receive information 
 *   of the next message that will be delivered through recvmsg() 
 *   if this information is already available when delivering 
 *   the current message. 
 * 
 *   cmsg_level    cmsg_type      cmsg_data[] 
 *   ------------  ------------   ------------------- 
 *   IPPROTO_SCTP  SCTP_NXTINFO   struct sctp_nxtinfo 
 */ 
struct sctp_nxtinfo { 
	__u16 nxt_sid; 
	__u16 nxt_flags; 
	__u32 nxt_ppid; 
	__u32 nxt_length; 
	sctp_assoc_t nxt_assoc_id; 
}; 
 
/* 5.3.7 SCTP PR-SCTP Information Structure (SCTP_PRINFO) 
 * 
 *   This cmsghdr structure specifies SCTP options for sendmsg(). 
 * 
 *   cmsg_level    cmsg_type      cmsg_data[] 
 *   ------------  ------------   ------------------- 
 *   IPPROTO_SCTP  SCTP_PRINFO    struct sctp_prinfo 
 */ 
struct sctp_prinfo { 
	__u16 pr_policy; 
	__u32 pr_value; 
}; 
 
/* 5.3.8 SCTP AUTH Information Structure (SCTP_AUTHINFO) 
 * 
 *   This cmsghdr structure specifies SCTP options for sendmsg(). 
 * 
 *   cmsg_level    cmsg_type      cmsg_data[] 
 *   ------------  ------------   ------------------- 
 *   IPPROTO_SCTP  SCTP_AUTHINFO  struct sctp_authinfo 
 */ 
struct sctp_authinfo { 
	__u16 auth_keynumber; 
}; 
 
/* 
 *  sinfo_flags: 16 bits (unsigned integer) 
 * 
 *   This field may contain any of the following flags and is composed of 
 *   a bitwise OR of these values. 
 */ 
enum sctp_sinfo_flags { 
	SCTP_UNORDERED		= (1 << 0), /* Send/receive message unordered. */ 
	SCTP_ADDR_OVER		= (1 << 1), /* Override the primary destination. */ 
	SCTP_ABORT		= (1 << 2), /* Send an ABORT message to the peer. */ 
	SCTP_SACK_IMMEDIATELY	= (1 << 3), /* SACK should be sent without delay. */ 
	/* 2 bits here have been used by SCTP_PR_SCTP_MASK */ 
	SCTP_SENDALL		= (1 << 6), 
	SCTP_PR_SCTP_ALL	= (1 << 7), 
	SCTP_NOTIFICATION	= MSG_NOTIFICATION, /* Next message is not user msg but notification. */ 
	SCTP_EOF		= MSG_FIN,  /* Initiate graceful shutdown process. */ 
}; 
 
typedef union { 
	__u8   			raw; 
	struct sctp_initmsg	init; 
	struct sctp_sndrcvinfo	sndrcv; 
} sctp_cmsg_data_t; 
 
/* These are cmsg_types.  */ 
typedef enum sctp_cmsg_type { 
	SCTP_INIT,		/* 5.2.1 SCTP Initiation Structure */ 
#define SCTP_INIT	SCTP_INIT 
	SCTP_SNDRCV,		/* 5.2.2 SCTP Header Information Structure */ 
#define SCTP_SNDRCV	SCTP_SNDRCV 
	SCTP_SNDINFO,		/* 5.3.4 SCTP Send Information Structure */ 
#define SCTP_SNDINFO	SCTP_SNDINFO 
	SCTP_RCVINFO,		/* 5.3.5 SCTP Receive Information Structure */ 
#define SCTP_RCVINFO	SCTP_RCVINFO 
	SCTP_NXTINFO,		/* 5.3.6 SCTP Next Receive Information Structure */ 
#define SCTP_NXTINFO	SCTP_NXTINFO 
	SCTP_PRINFO,		/* 5.3.7 SCTP PR-SCTP Information Structure */ 
#define SCTP_PRINFO	SCTP_PRINFO 
	SCTP_AUTHINFO,		/* 5.3.8 SCTP AUTH Information Structure */ 
#define SCTP_AUTHINFO	SCTP_AUTHINFO 
	SCTP_DSTADDRV4,		/* 5.3.9 SCTP Destination IPv4 Address Structure */ 
#define SCTP_DSTADDRV4	SCTP_DSTADDRV4 
	SCTP_DSTADDRV6,		/* 5.3.10 SCTP Destination IPv6 Address Structure */ 
#define SCTP_DSTADDRV6	SCTP_DSTADDRV6 
} sctp_cmsg_t; 
 
/* 
 * 5.3.1.1 SCTP_ASSOC_CHANGE 
 * 
 *   Communication notifications inform the ULP that an SCTP association 
 *   has either begun or ended. The identifier for a new association is 
 *   provided by this notificaion. The notification information has the 
 *   following format: 
 * 
 */ 
struct sctp_assoc_change { 
	__u16 sac_type; 
	__u16 sac_flags; 
	__u32 sac_length; 
	__u16 sac_state; 
	__u16 sac_error; 
	__u16 sac_outbound_streams; 
	__u16 sac_inbound_streams; 
	sctp_assoc_t sac_assoc_id; 
	__u8 sac_info[0]; 
}; 
 
/* 
 *   sac_state: 32 bits (signed integer) 
 * 
 *   This field holds one of a number of values that communicate the 
 *   event that happened to the association.  They include: 
 * 
 *   Note:  The following state names deviate from the API draft as 
 *   the names clash too easily with other kernel symbols. 
 */ 
enum sctp_sac_state { 
	SCTP_COMM_UP, 
	SCTP_COMM_LOST, 
	SCTP_RESTART, 
	SCTP_SHUTDOWN_COMP, 
	SCTP_CANT_STR_ASSOC, 
}; 
 
/* 
 * 5.3.1.2 SCTP_PEER_ADDR_CHANGE 
 * 
 *   When a destination address on a multi-homed peer encounters a change 
 *   an interface details event is sent.  The information has the 
 *   following structure: 
 */ 
struct sctp_paddr_change { 
	__u16 spc_type; 
	__u16 spc_flags; 
	__u32 spc_length; 
	struct sockaddr_storage spc_aaddr; 
	int spc_state; 
	int spc_error; 
	sctp_assoc_t spc_assoc_id; 
} __attribute__((packed, aligned(4))); 
 
/* 
 *    spc_state:  32 bits (signed integer) 
 * 
 *   This field holds one of a number of values that communicate the 
 *   event that happened to the address.  They include: 
 */ 
enum sctp_spc_state { 
	SCTP_ADDR_AVAILABLE, 
	SCTP_ADDR_UNREACHABLE, 
	SCTP_ADDR_REMOVED, 
	SCTP_ADDR_ADDED, 
	SCTP_ADDR_MADE_PRIM, 
	SCTP_ADDR_CONFIRMED, 
	SCTP_ADDR_POTENTIALLY_FAILED, 
#define SCTP_ADDR_PF	SCTP_ADDR_POTENTIALLY_FAILED 
}; 
 
 
/* 
 * 5.3.1.3 SCTP_REMOTE_ERROR 
 * 
 *   A remote peer may send an Operational Error message to its peer. 
 *   This message indicates a variety of error conditions on an 
 *   association. The entire error TLV as it appears on the wire is 
 *   included in a SCTP_REMOTE_ERROR event.  Please refer to the SCTP 
 *   specification [SCTP] and any extensions for a list of possible 
 *   error formats. SCTP error TLVs have the format: 
 */ 
struct sctp_remote_error { 
	__u16 sre_type; 
	__u16 sre_flags; 
	__u32 sre_length; 
	__be16 sre_error; 
	sctp_assoc_t sre_assoc_id; 
	__u8 sre_data[0]; 
}; 
 
 
/* 
 * 5.3.1.4 SCTP_SEND_FAILED 
 * 
 *   If SCTP cannot deliver a message it may return the message as a 
 *   notification. 
 */ 
struct sctp_send_failed { 
	__u16 ssf_type; 
	__u16 ssf_flags; 
	__u32 ssf_length; 
	__u32 ssf_error; 
	struct sctp_sndrcvinfo ssf_info; 
	sctp_assoc_t ssf_assoc_id; 
	__u8 ssf_data[0]; 
}; 
 
struct sctp_send_failed_event { 
	__u16 ssf_type; 
	__u16 ssf_flags; 
	__u32 ssf_length; 
	__u32 ssf_error; 
	struct sctp_sndinfo ssfe_info; 
	sctp_assoc_t ssf_assoc_id; 
	__u8 ssf_data[0]; 
}; 
 
/* 
 *   ssf_flags: 16 bits (unsigned integer) 
 * 
 *   The flag value will take one of the following values 
 * 
 *   SCTP_DATA_UNSENT  - Indicates that the data was never put on 
 *                       the wire. 
 * 
 *   SCTP_DATA_SENT    - Indicates that the data was put on the wire. 
 *                       Note that this does not necessarily mean that the 
 *                       data was (or was not) successfully delivered. 
 */ 
enum sctp_ssf_flags { 
	SCTP_DATA_UNSENT, 
	SCTP_DATA_SENT, 
}; 
 
/* 
 * 5.3.1.5 SCTP_SHUTDOWN_EVENT 
 * 
 *   When a peer sends a SHUTDOWN, SCTP delivers this notification to 
 *   inform the application that it should cease sending data. 
 */ 
struct sctp_shutdown_event { 
	__u16 sse_type; 
	__u16 sse_flags; 
	__u32 sse_length; 
	sctp_assoc_t sse_assoc_id; 
}; 
 
/* 
 * 5.3.1.6 SCTP_ADAPTATION_INDICATION 
 * 
 *   When a peer sends a Adaptation Layer Indication parameter , SCTP 
 *   delivers this notification to inform the application 
 *   that of the peers requested adaptation layer. 
 */ 
struct sctp_adaptation_event { 
	__u16 sai_type; 
	__u16 sai_flags; 
	__u32 sai_length; 
	__u32 sai_adaptation_ind; 
	sctp_assoc_t sai_assoc_id; 
}; 
 
/* 
 * 5.3.1.7 SCTP_PARTIAL_DELIVERY_EVENT 
 * 
 *   When a receiver is engaged in a partial delivery of a 
 *   message this notification will be used to indicate 
 *   various events. 
 */ 
struct sctp_pdapi_event { 
	__u16 pdapi_type; 
	__u16 pdapi_flags; 
	__u32 pdapi_length; 
	__u32 pdapi_indication; 
	sctp_assoc_t pdapi_assoc_id; 
	__u32 pdapi_stream; 
	__u32 pdapi_seq; 
}; 
 
enum { SCTP_PARTIAL_DELIVERY_ABORTED=0, }; 
 
/* 
 * 5.3.1.8.  SCTP_AUTHENTICATION_EVENT 
 * 
 *  When a receiver is using authentication this message will provide 
 *  notifications regarding new keys being made active as well as errors. 
 */ 
struct sctp_authkey_event { 
	__u16 auth_type; 
	__u16 auth_flags; 
	__u32 auth_length; 
	__u16 auth_keynumber; 
	__u16 auth_altkeynumber; 
	__u32 auth_indication; 
	sctp_assoc_t auth_assoc_id; 
}; 
 
enum { 
	SCTP_AUTH_NEW_KEY, 
#define	SCTP_AUTH_NEWKEY	SCTP_AUTH_NEW_KEY /* compatible with before */ 
	SCTP_AUTH_FREE_KEY, 
	SCTP_AUTH_NO_AUTH, 
}; 
 
/* 
 * 6.1.9. SCTP_SENDER_DRY_EVENT 
 * 
 * When the SCTP stack has no more user data to send or retransmit, this 
 * notification is given to the user. Also, at the time when a user app 
 * subscribes to this event, if there is no data to be sent or 
 * retransmit, the stack will immediately send up this notification. 
 */ 
struct sctp_sender_dry_event { 
	__u16 sender_dry_type; 
	__u16 sender_dry_flags; 
	__u32 sender_dry_length; 
	sctp_assoc_t sender_dry_assoc_id; 
}; 
 
#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 
struct sctp_stream_reset_event { 
	__u16 strreset_type; 
	__u16 strreset_flags; 
	__u32 strreset_length; 
	sctp_assoc_t strreset_assoc_id; 
	__u16 strreset_stream_list[]; 
}; 
 
#define SCTP_ASSOC_RESET_DENIED		0x0004 
#define SCTP_ASSOC_RESET_FAILED		0x0008 
struct sctp_assoc_reset_event { 
	__u16 assocreset_type; 
	__u16 assocreset_flags; 
	__u32 assocreset_length; 
	sctp_assoc_t assocreset_assoc_id; 
	__u32 assocreset_local_tsn; 
	__u32 assocreset_remote_tsn; 
}; 
 
#define SCTP_ASSOC_CHANGE_DENIED	0x0004 
#define SCTP_ASSOC_CHANGE_FAILED	0x0008 
#define SCTP_STREAM_CHANGE_DENIED	SCTP_ASSOC_CHANGE_DENIED 
#define SCTP_STREAM_CHANGE_FAILED	SCTP_ASSOC_CHANGE_FAILED 
struct sctp_stream_change_event { 
	__u16 strchange_type; 
	__u16 strchange_flags; 
	__u32 strchange_length; 
	sctp_assoc_t strchange_assoc_id; 
	__u16 strchange_instrms; 
	__u16 strchange_outstrms; 
}; 
 
/* 
 * Described in Section 7.3 
 *   Ancillary Data and Notification Interest Options 
 */ 
struct sctp_event_subscribe { 
	__u8 sctp_data_io_event; 
	__u8 sctp_association_event; 
	__u8 sctp_address_event; 
	__u8 sctp_send_failure_event; 
	__u8 sctp_peer_error_event; 
	__u8 sctp_shutdown_event; 
	__u8 sctp_partial_delivery_event; 
	__u8 sctp_adaptation_layer_event; 
	__u8 sctp_authentication_event; 
	__u8 sctp_sender_dry_event; 
	__u8 sctp_stream_reset_event; 
	__u8 sctp_assoc_reset_event; 
	__u8 sctp_stream_change_event; 
	__u8 sctp_send_failure_event_event; 
}; 
 
/* 
 * 5.3.1 SCTP Notification Structure 
 * 
 *   The notification structure is defined as the union of all 
 *   notification types. 
 * 
 */ 
union sctp_notification { 
	struct { 
		__u16 sn_type;             /* Notification type. */ 
		__u16 sn_flags; 
		__u32 sn_length; 
	} 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; 
	struct sctp_pdapi_event sn_pdapi_event; 
	struct sctp_authkey_event sn_authkey_event; 
	struct sctp_sender_dry_event sn_sender_dry_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; 
	struct sctp_send_failed_event sn_send_failed_event; 
}; 
 
/* Section 5.3.1 
 * All standard values for sn_type flags are greater than 2^15. 
 * Values from 2^15 and down are reserved. 
 */ 
 
enum sctp_sn_type { 
	SCTP_SN_TYPE_BASE	= (1<<15), 
	SCTP_DATA_IO_EVENT	= SCTP_SN_TYPE_BASE, 
#define SCTP_DATA_IO_EVENT		SCTP_DATA_IO_EVENT 
	SCTP_ASSOC_CHANGE, 
#define SCTP_ASSOC_CHANGE		SCTP_ASSOC_CHANGE 
	SCTP_PEER_ADDR_CHANGE, 
#define SCTP_PEER_ADDR_CHANGE		SCTP_PEER_ADDR_CHANGE 
	SCTP_SEND_FAILED, 
#define SCTP_SEND_FAILED		SCTP_SEND_FAILED 
	SCTP_REMOTE_ERROR, 
#define SCTP_REMOTE_ERROR		SCTP_REMOTE_ERROR 
	SCTP_SHUTDOWN_EVENT, 
#define SCTP_SHUTDOWN_EVENT		SCTP_SHUTDOWN_EVENT 
	SCTP_PARTIAL_DELIVERY_EVENT, 
#define SCTP_PARTIAL_DELIVERY_EVENT	SCTP_PARTIAL_DELIVERY_EVENT 
	SCTP_ADAPTATION_INDICATION, 
#define SCTP_ADAPTATION_INDICATION	SCTP_ADAPTATION_INDICATION 
	SCTP_AUTHENTICATION_EVENT, 
#define SCTP_AUTHENTICATION_INDICATION	SCTP_AUTHENTICATION_EVENT 
	SCTP_SENDER_DRY_EVENT, 
#define SCTP_SENDER_DRY_EVENT		SCTP_SENDER_DRY_EVENT 
	SCTP_STREAM_RESET_EVENT, 
#define SCTP_STREAM_RESET_EVENT		SCTP_STREAM_RESET_EVENT 
	SCTP_ASSOC_RESET_EVENT, 
#define SCTP_ASSOC_RESET_EVENT		SCTP_ASSOC_RESET_EVENT 
	SCTP_STREAM_CHANGE_EVENT, 
#define SCTP_STREAM_CHANGE_EVENT	SCTP_STREAM_CHANGE_EVENT 
	SCTP_SEND_FAILED_EVENT, 
#define SCTP_SEND_FAILED_EVENT		SCTP_SEND_FAILED_EVENT 
	SCTP_SN_TYPE_MAX	= SCTP_SEND_FAILED_EVENT, 
#define SCTP_SN_TYPE_MAX		SCTP_SN_TYPE_MAX 
}; 
 
/* Notification error codes used to fill up the error fields in some 
 * notifications. 
 * SCTP_PEER_ADDRESS_CHAGE 	: spc_error 
 * SCTP_ASSOC_CHANGE		: sac_error 
 * These names should be potentially included in the draft 04 of the SCTP 
 * sockets API specification. 
 */ 
typedef enum sctp_sn_error { 
	SCTP_FAILED_THRESHOLD, 
	SCTP_RECEIVED_SACK, 
	SCTP_HEARTBEAT_SUCCESS, 
	SCTP_RESPONSE_TO_USER_REQ, 
	SCTP_INTERNAL_ERROR, 
	SCTP_SHUTDOWN_GUARD_EXPIRES, 
	SCTP_PEER_FAULTY, 
} sctp_sn_error_t; 
 
/* 
 * 7.1.1 Retransmission Timeout Parameters (SCTP_RTOINFO) 
 * 
 *   The protocol parameters used to initialize and bound retransmission 
 *   timeout (RTO) are tunable.  See [SCTP] for more information on how 
 *   these parameters are used in RTO calculation. 
 */ 
struct sctp_rtoinfo { 
	sctp_assoc_t	srto_assoc_id; 
	__u32		srto_initial; 
	__u32		srto_max; 
	__u32		srto_min; 
}; 
 
/* 
 * 7.1.2 Association Parameters (SCTP_ASSOCINFO) 
 * 
 *   This option is used to both examine and set various association and 
 *   endpoint parameters. 
 */ 
struct sctp_assocparams { 
	sctp_assoc_t	sasoc_assoc_id; 
	__u16		sasoc_asocmaxrxt; 
	__u16		sasoc_number_peer_destinations; 
	__u32		sasoc_peer_rwnd; 
	__u32		sasoc_local_rwnd; 
	__u32		sasoc_cookie_life; 
}; 
 
/* 
 * 7.1.9 Set Peer Primary Address (SCTP_SET_PEER_PRIMARY_ADDR) 
 * 
 *  Requests that the peer mark the enclosed address as the association 
 *  primary. The enclosed address must be one of the association's 
 *  locally bound addresses. The following structure is used to make a 
 *   set primary request: 
 */ 
struct sctp_setpeerprim { 
	sctp_assoc_t            sspp_assoc_id; 
	struct sockaddr_storage sspp_addr; 
} __attribute__((packed, aligned(4))); 
 
/* 
 * 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR) 
 * 
 *  Requests that the local SCTP stack use the enclosed peer address as 
 *  the association primary. The enclosed address must be one of the 
 *  association peer's addresses. The following structure is used to 
 *  make a set peer primary request: 
 */ 
struct sctp_prim { 
	sctp_assoc_t            ssp_assoc_id; 
	struct sockaddr_storage ssp_addr; 
} __attribute__((packed, aligned(4))); 
 
/* For backward compatibility use, define the old name too */ 
#define sctp_setprim	sctp_prim 
 
/* 
 * 7.1.11 Set Adaptation Layer Indicator (SCTP_ADAPTATION_LAYER) 
 * 
 * Requests that the local endpoint set the specified Adaptation Layer 
 * Indication parameter for all future INIT and INIT-ACK exchanges. 
 */ 
struct sctp_setadaptation { 
	__u32	ssb_adaptation_ind; 
}; 
 
/* 
 * 7.1.13 Peer Address Parameters  (SCTP_PEER_ADDR_PARAMS) 
 * 
 *   Applications can enable or disable heartbeats for any peer address 
 *   of an association, modify an address's heartbeat interval, force a 
 *   heartbeat to be sent immediately, and adjust the address's maximum 
 *   number of retransmissions sent before an address is considered 
 *   unreachable. The following structure is used to access and modify an 
 *   address's parameters: 
 */ 
enum  sctp_spp_flags { 
	SPP_HB_ENABLE = 1<<0,		/*Enable heartbeats*/ 
	SPP_HB_DISABLE = 1<<1,		/*Disable heartbeats*/ 
	SPP_HB = SPP_HB_ENABLE | SPP_HB_DISABLE, 
	SPP_HB_DEMAND = 1<<2,		/*Send heartbeat immediately*/ 
	SPP_PMTUD_ENABLE = 1<<3,	/*Enable PMTU discovery*/ 
	SPP_PMTUD_DISABLE = 1<<4,	/*Disable PMTU discovery*/ 
	SPP_PMTUD = SPP_PMTUD_ENABLE | SPP_PMTUD_DISABLE, 
	SPP_SACKDELAY_ENABLE = 1<<5,	/*Enable SACK*/ 
	SPP_SACKDELAY_DISABLE = 1<<6,	/*Disable SACK*/ 
	SPP_SACKDELAY = SPP_SACKDELAY_ENABLE | SPP_SACKDELAY_DISABLE, 
	SPP_HB_TIME_IS_ZERO = 1<<7,	/* Set HB delay to 0 */ 
	SPP_IPV6_FLOWLABEL = 1<<8, 
	SPP_DSCP = 1<<9, 
}; 
 
struct sctp_paddrparams { 
	sctp_assoc_t		spp_assoc_id; 
	struct sockaddr_storage	spp_address; 
	__u32			spp_hbinterval; 
	__u16			spp_pathmaxrxt; 
	__u32			spp_pathmtu; 
	__u32			spp_sackdelay; 
	__u32			spp_flags; 
	__u32			spp_ipv6_flowlabel; 
	__u8			spp_dscp; 
} __attribute__((packed, aligned(4))); 
 
/* 
 * 7.1.18.  Add a chunk that must be authenticated (SCTP_AUTH_CHUNK) 
 * 
 * This set option adds a chunk type that the user is requesting to be 
 * received only in an authenticated way.  Changes to the list of chunks 
 * will only effect future associations on the socket. 
 */ 
struct sctp_authchunk { 
	__u8		sauth_chunk; 
}; 
 
/* 
 * 7.1.19.  Get or set the list of supported HMAC Identifiers (SCTP_HMAC_IDENT) 
 * 
 * This option gets or sets the list of HMAC algorithms that the local 
 * endpoint requires the peer to use. 
 */ 
/* This here is only used by user space as is. It might not be a good idea 
 * to export/reveal the whole structure with reserved fields etc. 
 */ 
enum { 
	SCTP_AUTH_HMAC_ID_SHA1 = 1, 
	SCTP_AUTH_HMAC_ID_SHA256 = 3, 
}; 
 
struct sctp_hmacalgo { 
	__u32		shmac_num_idents; 
	__u16		shmac_idents[]; 
}; 
 
/* Sadly, user and kernel space have different names for 
 * this structure member, so this is to not break anything. 
 */ 
#define shmac_number_of_idents	shmac_num_idents 
 
/* 
 * 7.1.20.  Set a shared key (SCTP_AUTH_KEY) 
 * 
 * This option will set a shared secret key which is used to build an 
 * association shared key. 
 */ 
struct sctp_authkey { 
	sctp_assoc_t	sca_assoc_id; 
	__u16		sca_keynumber; 
	__u16		sca_keylength; 
	__u8		sca_key[]; 
}; 
 
/* 
 * 7.1.21.  Get or set the active shared key (SCTP_AUTH_ACTIVE_KEY) 
 * 
 * This option will get or set the active shared key to be used to build 
 * the association shared key. 
 */ 
 
struct sctp_authkeyid { 
	sctp_assoc_t	scact_assoc_id; 
	__u16		scact_keynumber; 
}; 
 
 
/* 
 * 7.1.23.  Get or set delayed ack timer (SCTP_DELAYED_SACK) 
 * 
 * This option will effect the way delayed acks are performed.  This 
 * option allows you to get or set the delayed ack time, in 
 * milliseconds.  It also allows changing the delayed ack frequency. 
 * Changing the frequency to 1 disables the delayed sack algorithm.  If 
 * the assoc_id is 0, then this sets or gets the endpoints default 
 * values.  If the assoc_id field is non-zero, then the set or get 
 * effects the specified association for the one to many model (the 
 * assoc_id field is ignored by the one to one model).  Note that if 
 * sack_delay or sack_freq are 0 when setting this option, then the 
 * current values will remain unchanged. 
 */ 
struct sctp_sack_info { 
	sctp_assoc_t	sack_assoc_id; 
	uint32_t	sack_delay; 
	uint32_t	sack_freq; 
}; 
 
struct sctp_assoc_value { 
    sctp_assoc_t            assoc_id; 
    uint32_t                assoc_value; 
}; 
 
struct sctp_stream_value { 
	sctp_assoc_t assoc_id; 
	uint16_t stream_id; 
	uint16_t stream_value; 
}; 
 
/* 
 * 7.2.2 Peer Address Information 
 * 
 *   Applications can retrieve information about a specific peer address 
 *   of an association, including its reachability state, congestion 
 *   window, and retransmission timer values.  This information is 
 *   read-only. The following structure is used to access this 
 *   information: 
 */ 
struct sctp_paddrinfo { 
	sctp_assoc_t		spinfo_assoc_id; 
	struct sockaddr_storage	spinfo_address; 
	__s32			spinfo_state; 
	__u32			spinfo_cwnd; 
	__u32			spinfo_srtt; 
	__u32			spinfo_rto; 
	__u32			spinfo_mtu; 
} __attribute__((packed, aligned(4))); 
 
/* Peer addresses's state. */ 
/* UNKNOWN: Peer address passed by the upper layer in sendmsg or connect[x] 
 * calls. 
 * UNCONFIRMED: Peer address received in INIT/INIT-ACK address parameters. 
 *              Not yet confirmed by a heartbeat and not available for data 
 *		transfers. 
 * ACTIVE : Peer address confirmed, active and available for data transfers. 
 * INACTIVE: Peer address inactive and not available for data transfers. 
 */ 
enum sctp_spinfo_state { 
	SCTP_INACTIVE, 
	SCTP_PF, 
#define	SCTP_POTENTIALLY_FAILED		SCTP_PF 
	SCTP_ACTIVE, 
	SCTP_UNCONFIRMED, 
	SCTP_UNKNOWN = 0xffff  /* Value used for transport state unknown */ 
}; 
 
/* 
 * 7.2.1 Association Status (SCTP_STATUS) 
 * 
 *   Applications can retrieve current status information about an 
 *   association, including association state, peer receiver window size, 
 *   number of unacked data chunks, and number of data chunks pending 
 *   receipt.  This information is read-only.  The following structure is 
 *   used to access this information: 
 */ 
struct sctp_status { 
	sctp_assoc_t		sstat_assoc_id; 
	__s32			sstat_state; 
	__u32			sstat_rwnd; 
	__u16			sstat_unackdata; 
	__u16			sstat_penddata; 
	__u16			sstat_instrms; 
	__u16			sstat_outstrms; 
	__u32			sstat_fragmentation_point; 
	struct sctp_paddrinfo	sstat_primary; 
}; 
 
/* 
 * 7.2.3.  Get the list of chunks the peer requires to be authenticated 
 *         (SCTP_PEER_AUTH_CHUNKS) 
 * 
 * This option gets a list of chunks for a specified association that 
 * the peer requires to be received authenticated only. 
 */ 
struct sctp_authchunks { 
	sctp_assoc_t	gauth_assoc_id; 
	__u32		gauth_number_of_chunks; 
	uint8_t		gauth_chunks[]; 
}; 
 
/* The broken spelling has been released already in lksctp-tools header, 
 * so don't break anyone, now that it's fixed. 
 */ 
#define guth_number_of_chunks	gauth_number_of_chunks 
 
/* Association states.  */ 
enum sctp_sstat_state { 
	SCTP_EMPTY                = 0, 
	SCTP_CLOSED               = 1, 
	SCTP_COOKIE_WAIT          = 2, 
	SCTP_COOKIE_ECHOED        = 3, 
	SCTP_ESTABLISHED          = 4, 
	SCTP_SHUTDOWN_PENDING     = 5, 
	SCTP_SHUTDOWN_SENT        = 6, 
	SCTP_SHUTDOWN_RECEIVED    = 7, 
	SCTP_SHUTDOWN_ACK_SENT    = 8, 
}; 
 
/* 
 * 8.2.6. Get the Current Identifiers of Associations 
 *        (SCTP_GET_ASSOC_ID_LIST) 
 * 
 * This option gets the current list of SCTP association identifiers of 
 * the SCTP associations handled by a one-to-many style socket. 
 */ 
struct sctp_assoc_ids { 
	__u32		gaids_number_of_ids; 
	sctp_assoc_t	gaids_assoc_id[]; 
}; 
 
/* 
 * 8.3, 8.5 get all peer/local addresses in an association. 
 * This parameter struct is used by SCTP_GET_PEER_ADDRS and 
 * SCTP_GET_LOCAL_ADDRS socket options used internally to implement 
 * sctp_getpaddrs() and sctp_getladdrs() API. 
 */ 
struct sctp_getaddrs_old { 
	sctp_assoc_t            assoc_id; 
	int			addr_num; 
	struct sockaddr		*addrs; 
}; 
 
struct sctp_getaddrs { 
	sctp_assoc_t		assoc_id; /*input*/ 
	__u32			addr_num; /*output*/ 
	__u8			addrs[0]; /*output, variable size*/ 
}; 
 
/* A socket user request obtained via SCTP_GET_ASSOC_STATS that retrieves 
 * association stats. All stats are counts except sas_maxrto and 
 * sas_obs_rto_ipaddr. maxrto is the max observed rto + transport since 
 * the last call. Will return 0 when RTO was not update since last call 
 */ 
struct sctp_assoc_stats { 
	sctp_assoc_t	sas_assoc_id;    /* Input */ 
					 /* Transport of observed max RTO */ 
	struct sockaddr_storage sas_obs_rto_ipaddr; 
	__u64		sas_maxrto;      /* Maximum Observed RTO for period */ 
	__u64		sas_isacks;	 /* SACKs received */ 
	__u64		sas_osacks;	 /* SACKs sent */ 
	__u64		sas_opackets;	 /* Packets sent */ 
	__u64		sas_ipackets;	 /* Packets received */ 
	__u64		sas_rtxchunks;   /* Retransmitted Chunks */ 
	__u64		sas_outofseqtsns;/* TSN received > next expected */ 
	__u64		sas_idupchunks;  /* Dups received (ordered+unordered) */ 
	__u64		sas_gapcnt;      /* Gap Acknowledgements Received */ 
	__u64		sas_ouodchunks;  /* Unordered data chunks sent */ 
	__u64		sas_iuodchunks;  /* Unordered data chunks received */ 
	__u64		sas_oodchunks;	 /* Ordered data chunks sent */ 
	__u64		sas_iodchunks;	 /* Ordered data chunks received */ 
	__u64		sas_octrlchunks; /* Control chunks sent */ 
	__u64		sas_ictrlchunks; /* Control chunks received */ 
}; 
 
/* 
 * 8.1 sctp_bindx() 
 * 
 * The flags parameter is formed from the bitwise OR of zero or more of the 
 * following currently defined flags: 
 */ 
#define SCTP_BINDX_ADD_ADDR 0x01 
#define SCTP_BINDX_REM_ADDR 0x02 
 
/* This is the structure that is passed as an argument(optval) to 
 * getsockopt(SCTP_SOCKOPT_PEELOFF). 
 */ 
typedef struct { 
	sctp_assoc_t associd; 
	int sd; 
} sctp_peeloff_arg_t; 
 
typedef struct { 
	sctp_peeloff_arg_t p_arg; 
	unsigned flags; 
} sctp_peeloff_flags_arg_t; 
 
/* 
 *  Peer Address Thresholds socket option 
 */ 
struct sctp_paddrthlds { 
	sctp_assoc_t spt_assoc_id; 
	struct sockaddr_storage spt_address; 
	__u16 spt_pathmaxrxt; 
	__u16 spt_pathpfthld; 
}; 
 
/* Use a new structure with spt_pathcpthld for back compatibility */ 
struct sctp_paddrthlds_v2 { 
	sctp_assoc_t spt_assoc_id; 
	struct sockaddr_storage spt_address; 
	__u16 spt_pathmaxrxt; 
	__u16 spt_pathpfthld; 
	__u16 spt_pathcpthld; 
}; 
 
/* 
 * Socket Option for Getting the Association/Stream-Specific PR-SCTP Status 
 */ 
struct sctp_prstatus { 
	sctp_assoc_t sprstat_assoc_id; 
	__u16 sprstat_sid; 
	__u16 sprstat_policy; 
	__u64 sprstat_abandoned_unsent; 
	__u64 sprstat_abandoned_sent; 
}; 
 
struct sctp_default_prinfo { 
	sctp_assoc_t pr_assoc_id; 
	__u32 pr_value; 
	__u16 pr_policy; 
}; 
 
struct sctp_info { 
	__u32	sctpi_tag; 
	__u32	sctpi_state; 
	__u32	sctpi_rwnd; 
	__u16	sctpi_unackdata; 
	__u16	sctpi_penddata; 
	__u16	sctpi_instrms; 
	__u16	sctpi_outstrms; 
	__u32	sctpi_fragmentation_point; 
	__u32	sctpi_inqueue; 
	__u32	sctpi_outqueue; 
	__u32	sctpi_overall_error; 
	__u32	sctpi_max_burst; 
	__u32	sctpi_maxseg; 
	__u32	sctpi_peer_rwnd; 
	__u32	sctpi_peer_tag; 
	__u8	sctpi_peer_capable; 
	__u8	sctpi_peer_sack; 
	__u16	__reserved1; 
 
	/* assoc status info */ 
	__u64	sctpi_isacks; 
	__u64	sctpi_osacks; 
	__u64	sctpi_opackets; 
	__u64	sctpi_ipackets; 
	__u64	sctpi_rtxchunks; 
	__u64	sctpi_outofseqtsns; 
	__u64	sctpi_idupchunks; 
	__u64	sctpi_gapcnt; 
	__u64	sctpi_ouodchunks; 
	__u64	sctpi_iuodchunks; 
	__u64	sctpi_oodchunks; 
	__u64	sctpi_iodchunks; 
	__u64	sctpi_octrlchunks; 
	__u64	sctpi_ictrlchunks; 
 
	/* primary transport info */ 
	struct sockaddr_storage	sctpi_p_address; 
	__s32	sctpi_p_state; 
	__u32	sctpi_p_cwnd; 
	__u32	sctpi_p_srtt; 
	__u32	sctpi_p_rto; 
	__u32	sctpi_p_hbinterval; 
	__u32	sctpi_p_pathmaxrxt; 
	__u32	sctpi_p_sackdelay; 
	__u32	sctpi_p_sackfreq; 
	__u32	sctpi_p_ssthresh; 
	__u32	sctpi_p_partial_bytes_acked; 
	__u32	sctpi_p_flight_size; 
	__u16	sctpi_p_error; 
	__u16	__reserved2; 
 
	/* sctp sock info */ 
	__u32	sctpi_s_autoclose; 
	__u32	sctpi_s_adaptation_ind; 
	__u32	sctpi_s_pd_point; 
	__u8	sctpi_s_nodelay; 
	__u8	sctpi_s_disable_fragments; 
	__u8	sctpi_s_v4mapped; 
	__u8	sctpi_s_frag_interleave; 
	__u32	sctpi_s_type; 
	__u32	__reserved3; 
}; 
 
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 srs_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_event { 
	sctp_assoc_t se_assoc_id; 
	uint16_t se_type; 
	uint8_t se_on; 
}; 
 
/* SCTP Stream schedulers */ 
enum sctp_sched_type { 
	SCTP_SS_FCFS, 
	SCTP_SS_DEFAULT = SCTP_SS_FCFS, 
	SCTP_SS_PRIO, 
	SCTP_SS_RR, 
	SCTP_SS_MAX = SCTP_SS_RR 
}; 
 
#endif /* _SCTP_H */