1 files changed, 846 insertions, 0 deletions

diff --git a/include/uapi/linux/sctp.h b/include/uapi/linux/sctp.h
new file mode 100644
index 000000000000..66b466e4ca08
--- /dev/null
+++ b/include/uapi/linux/sctp.h
@@ -0,0 +1,846 @@
+/* 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, write to
+ * the Free Software Foundation, 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ *
+ * Please send any bug reports or fixes you make to the
+ * email address(es):
+ *    lksctp developers <lksctp-developers@lists.sourceforge.net>
+ *
+ * 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 _UAPI_SCTP_H
+#define _UAPI_SCTP_H
+
+#include <linux/types.h>
+#include <linux/socket.h>
+
+typedef __s32 sctp_assoc_t;
+
+/* 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
+
+/* 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 */
+
+/*
+ * 5.2.1 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;
+};
+
+/*
+ * 5.2.2 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;
+};
+
+/*
+ *  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,  /* Send/receive message unordered. */
+        SCTP_ADDR_OVER = 2,  /* Override the primary destination. */
+        SCTP_ABORT=4,        /* Send an ABORT message to the peer. */
+        SCTP_SACK_IMMEDIATELY = 8,      /* SACK should be sent without delay */
+        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_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,
+};
+
+
+/*
+ * 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;
+        __u16 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];
+};
+
+/*
+ *   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;
+};
+
+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_NEWKEY = 0, };
+
+/*
+ * 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;
+};
+
+/*
+ * 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;
+};
+
+/*
+ * 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;
+};
+
+/* 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_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
+};
+
+/* 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 */
+};
+
+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;
+} __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.
+ */
+#ifndef __KERNEL__
+/* 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,
+};
+#endif
+
+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;
+};
+
+/*
+ * 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,
+        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;
+#ifdef __KERNEL__
+        struct sockaddr         __user *addrs;
+#else
+        struct sockaddr         *addrs;
+#endif
+};
+
+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 */
+};
+
+/* 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
+};
+
+/*
+ * 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;
+
+/*
+ *  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;
+};
+
+#endif /* _UAPI_SCTP_H */