include/uapi/linux/sctp.h

   1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
   2 /* SCTP kernel implementation
   3  * (C) Copyright IBM Corp. 2001, 2004
   4  * Copyright (c) 1999-2000 Cisco, Inc.
   5  * Copyright (c) 1999-2001 Motorola, Inc.
   6  * Copyright (c) 2002 Intel Corp.
   7  *
   8  * This file is part of the SCTP kernel implementation
   9  *
  10  * This header represents the structures and constants needed to support
  11  * the SCTP Extension to the Sockets API.
  12  *
  13  * This SCTP implementation is free software;
  14  * you can redistribute it and/or modify it under the terms of
  15  * the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2, or (at your option)
  17  * any later version.
  18  *
  19  * This SCTP implementation is distributed in the hope that it
  20  * will be useful, but WITHOUT ANY WARRANTY; without even the implied
  21  *                 ************************
  22  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  23  * See the GNU General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU General Public License
  26  * along with GNU CC; see the file COPYING.  If not, see
  27  * <http://www.gnu.org/licenses/>.
  28  *
  29  * Please send any bug reports or fixes you make to the
  30  * email address(es):
  31  *    lksctp developers <linux-sctp@vger.kernel.org>
  32  *
  33  * Or submit a bug report through the following website:
  34  *    http://www.sf.net/projects/lksctp
  35  *
  36  * Written or modified by:
  37  *    La Monte H.P. Yarroll    <piggy@acm.org>
  38  *    R. Stewart               <randall@sctp.chicago.il.us>
  39  *    K. Morneau               <kmorneau@cisco.com>
  40  *    Q. Xie                   <qxie1@email.mot.com>
  41  *    Karl Knutson             <karl@athena.chicago.il.us>
  42  *    Jon Grimm                <jgrimm@us.ibm.com>
  43  *    Daisy Chang              <daisyc@us.ibm.com>
  44  *    Ryan Layer               <rmlayer@us.ibm.com>
  45  *    Ardelle Fan              <ardelle.fan@intel.com>
  46  *    Sridhar Samudrala        <sri@us.ibm.com>
  47  *    Inaky Perez-Gonzalez     <inaky.gonzalez@intel.com>
  48  *    Vlad Yasevich            <vladislav.yasevich@hp.com>
  49  *
  50  * Any bugs reported given to us we will try to fix... any fixes shared will
  51  * be incorporated into the next SCTP release.
  52  */
  53
  54 #ifndef _SCTP_H
  55 #define _SCTP_H
  56
  57 #include <linux/types.h>
  58 #include <linux/socket.h>
  59
  60 typedef __s32 sctp_assoc_t;
  61
  62 #define SCTP_FUTURE_ASSOC       0
  63 #define SCTP_CURRENT_ASSOC      1
  64 #define SCTP_ALL_ASSOC          2
  65
  66 /* The following symbols come from the Sockets API Extensions for
  67  * SCTP <draft-ietf-tsvwg-sctpsocket-07.txt>.
  68  */
  69 #define SCTP_RTOINFO    0
  70 #define SCTP_ASSOCINFO  1
  71 #define SCTP_INITMSG    2
  72 #define SCTP_NODELAY    3               /* Get/set nodelay option. */
  73 #define SCTP_AUTOCLOSE  4
  74 #define SCTP_SET_PEER_PRIMARY_ADDR 5
  75 #define SCTP_PRIMARY_ADDR       6
  76 #define SCTP_ADAPTATION_LAYER   7
  77 #define SCTP_DISABLE_FRAGMENTS  8
  78 #define SCTP_PEER_ADDR_PARAMS   9
  79 #define SCTP_DEFAULT_SEND_PARAM 10
  80 #define SCTP_EVENTS     11
  81 #define SCTP_I_WANT_MAPPED_V4_ADDR 12   /* Turn on/off mapped v4 addresses  */
  82 #define SCTP_MAXSEG     13              /* Get/set maximum fragment. */
  83 #define SCTP_STATUS     14
  84 #define SCTP_GET_PEER_ADDR_INFO 15
  85 #define SCTP_DELAYED_ACK_TIME   16
  86 #define SCTP_DELAYED_ACK SCTP_DELAYED_ACK_TIME
  87 #define SCTP_DELAYED_SACK SCTP_DELAYED_ACK_TIME
  88 #define SCTP_CONTEXT    17
  89 #define SCTP_FRAGMENT_INTERLEAVE        18
  90 #define SCTP_PARTIAL_DELIVERY_POINT     19 /* Set/Get partial delivery point */
  91 #define SCTP_MAX_BURST  20              /* Set/Get max burst */
  92 #define SCTP_AUTH_CHUNK 21      /* Set only: add a chunk type to authenticate */
  93 #define SCTP_HMAC_IDENT 22
  94 #define SCTP_AUTH_KEY   23
  95 #define SCTP_AUTH_ACTIVE_KEY    24
  96 #define SCTP_AUTH_DELETE_KEY    25
  97 #define SCTP_PEER_AUTH_CHUNKS   26      /* Read only */
  98 #define SCTP_LOCAL_AUTH_CHUNKS  27      /* Read only */
  99 #define SCTP_GET_ASSOC_NUMBER   28      /* Read only */
 100 #define SCTP_GET_ASSOC_ID_LIST  29      /* Read only */
 101 #define SCTP_AUTO_ASCONF       30
 102 #define SCTP_PEER_ADDR_THLDS    31
 103 #define SCTP_RECVRCVINFO        32
 104 #define SCTP_RECVNXTINFO        33
 105 #define SCTP_DEFAULT_SNDINFO    34
 106 #define SCTP_AUTH_DEACTIVATE_KEY        35
 107 #define SCTP_REUSE_PORT         36
 108
 109 /* Internal Socket Options. Some of the sctp library functions are
 110  * implemented using these socket options.
 111  */
 112 #define SCTP_SOCKOPT_BINDX_ADD  100     /* BINDX requests for adding addrs */
 113 #define SCTP_SOCKOPT_BINDX_REM  101     /* BINDX requests for removing addrs. */
 114 #define SCTP_SOCKOPT_PEELOFF    102     /* peel off association. */
 115 /* Options 104-106 are deprecated and removed. Do not use this space */
 116 #define SCTP_SOCKOPT_CONNECTX_OLD       107     /* CONNECTX old requests. */
 117 #define SCTP_GET_PEER_ADDRS     108             /* Get all peer address. */
 118 #define SCTP_GET_LOCAL_ADDRS    109             /* Get all local address. */
 119 #define SCTP_SOCKOPT_CONNECTX   110             /* CONNECTX requests. */
 120 #define SCTP_SOCKOPT_CONNECTX3  111     /* CONNECTX requests (updated) */
 121 #define SCTP_GET_ASSOC_STATS    112     /* Read only */
 122 #define SCTP_PR_SUPPORTED       113
 123 #define SCTP_DEFAULT_PRINFO     114
 124 #define SCTP_PR_ASSOC_STATUS    115
 125 #define SCTP_PR_STREAM_STATUS   116
 126 #define SCTP_RECONFIG_SUPPORTED 117
 127 #define SCTP_ENABLE_STREAM_RESET        118
 128 #define SCTP_RESET_STREAMS      119
 129 #define SCTP_RESET_ASSOC        120
 130 #define SCTP_ADD_STREAMS        121
 131 #define SCTP_SOCKOPT_PEELOFF_FLAGS 122
 132 #define SCTP_STREAM_SCHEDULER   123
 133 #define SCTP_STREAM_SCHEDULER_VALUE     124
 134 #define SCTP_INTERLEAVING_SUPPORTED     125
 135 #define SCTP_SENDMSG_CONNECT    126
 136 #define SCTP_EVENT      127
 137
 138 /* PR-SCTP policies */
 139 #define SCTP_PR_SCTP_NONE       0x0000
 140 #define SCTP_PR_SCTP_TTL        0x0010
 141 #define SCTP_PR_SCTP_RTX        0x0020
 142 #define SCTP_PR_SCTP_PRIO       0x0030
 143 #define SCTP_PR_SCTP_MAX        SCTP_PR_SCTP_PRIO
 144 #define SCTP_PR_SCTP_MASK       0x0030
 145
 146 #define __SCTP_PR_INDEX(x)      ((x >> 4) - 1)
 147 #define SCTP_PR_INDEX(x)        __SCTP_PR_INDEX(SCTP_PR_SCTP_ ## x)
 148
 149 #define SCTP_PR_POLICY(x)       ((x) & SCTP_PR_SCTP_MASK)
 150 #define SCTP_PR_SET_POLICY(flags, x)    \
 151         do {                            \
 152                 flags &= ~SCTP_PR_SCTP_MASK;    \
 153                 flags |= x;             \
 154         } while (0)
 155
 156 #define SCTP_PR_TTL_ENABLED(x)  (SCTP_PR_POLICY(x) == SCTP_PR_SCTP_TTL)
 157 #define SCTP_PR_RTX_ENABLED(x)  (SCTP_PR_POLICY(x) == SCTP_PR_SCTP_RTX)
 158 #define SCTP_PR_PRIO_ENABLED(x) (SCTP_PR_POLICY(x) == SCTP_PR_SCTP_PRIO)
 159
 160 /* For enable stream reset */
 161 #define SCTP_ENABLE_RESET_STREAM_REQ    0x01
 162 #define SCTP_ENABLE_RESET_ASSOC_REQ     0x02
 163 #define SCTP_ENABLE_CHANGE_ASSOC_REQ    0x04
 164 #define SCTP_ENABLE_STRRESET_MASK       0x07
 165
 166 #define SCTP_STREAM_RESET_INCOMING      0x01
 167 #define SCTP_STREAM_RESET_OUTGOING      0x02
 168
 169 /* These are bit fields for msghdr->msg_flags.  See section 5.1.  */
 170 /* On user space Linux, these live in <bits/socket.h> as an enum.  */
 171 enum sctp_msg_flags {
 172         MSG_NOTIFICATION = 0x8000,
 173 #define MSG_NOTIFICATION MSG_NOTIFICATION
 174 };
 175
 176 /* 5.3.1 SCTP Initiation Structure (SCTP_INIT)
 177  *
 178  *   This cmsghdr structure provides information for initializing new
 179  *   SCTP associations with sendmsg().  The SCTP_INITMSG socket option
 180  *   uses this same data structure.  This structure is not used for
 181  *   recvmsg().
 182  *
 183  *   cmsg_level    cmsg_type      cmsg_data[]
 184  *   ------------  ------------   ----------------------
 185  *   IPPROTO_SCTP  SCTP_INIT      struct sctp_initmsg
 186  */
 187 struct sctp_initmsg {
 188         __u16 sinit_num_ostreams;
 189         __u16 sinit_max_instreams;
 190         __u16 sinit_max_attempts;
 191         __u16 sinit_max_init_timeo;
 192 };
 193
 194 /* 5.3.2 SCTP Header Information Structure (SCTP_SNDRCV)
 195  *
 196  *   This cmsghdr structure specifies SCTP options for sendmsg() and
 197  *   describes SCTP header information about a received message through
 198  *   recvmsg().
 199  *
 200  *   cmsg_level    cmsg_type      cmsg_data[]
 201  *   ------------  ------------   ----------------------
 202  *   IPPROTO_SCTP  SCTP_SNDRCV    struct sctp_sndrcvinfo
 203  */
 204 struct sctp_sndrcvinfo {
 205         __u16 sinfo_stream;
 206         __u16 sinfo_ssn;
 207         __u16 sinfo_flags;
 208         __u32 sinfo_ppid;
 209         __u32 sinfo_context;
 210         __u32 sinfo_timetolive;
 211         __u32 sinfo_tsn;
 212         __u32 sinfo_cumtsn;
 213         sctp_assoc_t sinfo_assoc_id;
 214 };
 215
 216 /* 5.3.4 SCTP Send Information Structure (SCTP_SNDINFO)
 217  *
 218  *   This cmsghdr structure specifies SCTP options for sendmsg().
 219  *
 220  *   cmsg_level    cmsg_type      cmsg_data[]
 221  *   ------------  ------------   -------------------
 222  *   IPPROTO_SCTP  SCTP_SNDINFO   struct sctp_sndinfo
 223  */
 224 struct sctp_sndinfo {
 225         __u16 snd_sid;
 226         __u16 snd_flags;
 227         __u32 snd_ppid;
 228         __u32 snd_context;
 229         sctp_assoc_t snd_assoc_id;
 230 };
 231
 232 /* 5.3.5 SCTP Receive Information Structure (SCTP_RCVINFO)
 233  *
 234  *   This cmsghdr structure describes SCTP receive information
 235  *   about a received message through recvmsg().
 236  *
 237  *   cmsg_level    cmsg_type      cmsg_data[]
 238  *   ------------  ------------   -------------------
 239  *   IPPROTO_SCTP  SCTP_RCVINFO   struct sctp_rcvinfo
 240  */
 241 struct sctp_rcvinfo {
 242         __u16 rcv_sid;
 243         __u16 rcv_ssn;
 244         __u16 rcv_flags;
 245         __u32 rcv_ppid;
 246         __u32 rcv_tsn;
 247         __u32 rcv_cumtsn;
 248         __u32 rcv_context;
 249         sctp_assoc_t rcv_assoc_id;
 250 };
 251
 252 /* 5.3.6 SCTP Next Receive Information Structure (SCTP_NXTINFO)
 253  *
 254  *   This cmsghdr structure describes SCTP receive information
 255  *   of the next message that will be delivered through recvmsg()
 256  *   if this information is already available when delivering
 257  *   the current message.
 258  *
 259  *   cmsg_level    cmsg_type      cmsg_data[]
 260  *   ------------  ------------   -------------------
 261  *   IPPROTO_SCTP  SCTP_NXTINFO   struct sctp_nxtinfo
 262  */
 263 struct sctp_nxtinfo {
 264         __u16 nxt_sid;
 265         __u16 nxt_flags;
 266         __u32 nxt_ppid;
 267         __u32 nxt_length;
 268         sctp_assoc_t nxt_assoc_id;
 269 };
 270
 271 /* 5.3.7 SCTP PR-SCTP Information Structure (SCTP_PRINFO)
 272  *
 273  *   This cmsghdr structure specifies SCTP options for sendmsg().
 274  *
 275  *   cmsg_level    cmsg_type      cmsg_data[]
 276  *   ------------  ------------   -------------------
 277  *   IPPROTO_SCTP  SCTP_PRINFO    struct sctp_prinfo
 278  */
 279 struct sctp_prinfo {
 280         __u16 pr_policy;
 281         __u32 pr_value;
 282 };
 283
 284 /* 5.3.8 SCTP AUTH Information Structure (SCTP_AUTHINFO)
 285  *
 286  *   This cmsghdr structure specifies SCTP options for sendmsg().
 287  *
 288  *   cmsg_level    cmsg_type      cmsg_data[]
 289  *   ------------  ------------   -------------------
 290  *   IPPROTO_SCTP  SCTP_AUTHINFO  struct sctp_authinfo
 291  */
 292 struct sctp_authinfo {
 293         __u16 auth_keynumber;
 294 };
 295
 296 /*
 297  *  sinfo_flags: 16 bits (unsigned integer)
 298  *
 299  *   This field may contain any of the following flags and is composed of
 300  *   a bitwise OR of these values.
 301  */
 302 enum sctp_sinfo_flags {
 303         SCTP_UNORDERED          = (1 << 0), /* Send/receive message unordered. */
 304         SCTP_ADDR_OVER          = (1 << 1), /* Override the primary destination. */
 305         SCTP_ABORT              = (1 << 2), /* Send an ABORT message to the peer. */
 306         SCTP_SACK_IMMEDIATELY   = (1 << 3), /* SACK should be sent without delay. */
 307         /* 2 bits here have been used by SCTP_PR_SCTP_MASK */
 308         SCTP_SENDALL            = (1 << 6),
 309         SCTP_PR_SCTP_ALL        = (1 << 7),
 310         SCTP_NOTIFICATION       = MSG_NOTIFICATION, /* Next message is not user msg but notification. */
 311         SCTP_EOF                = MSG_FIN,  /* Initiate graceful shutdown process. */
 312 };
 313
 314 typedef union {
 315         __u8                    raw;
 316         struct sctp_initmsg     init;
 317         struct sctp_sndrcvinfo  sndrcv;
 318 } sctp_cmsg_data_t;
 319
 320 /* These are cmsg_types.  */
 321 typedef enum sctp_cmsg_type {
 322         SCTP_INIT,              /* 5.2.1 SCTP Initiation Structure */
 323 #define SCTP_INIT       SCTP_INIT
 324         SCTP_SNDRCV,            /* 5.2.2 SCTP Header Information Structure */
 325 #define SCTP_SNDRCV     SCTP_SNDRCV
 326         SCTP_SNDINFO,           /* 5.3.4 SCTP Send Information Structure */
 327 #define SCTP_SNDINFO    SCTP_SNDINFO
 328         SCTP_RCVINFO,           /* 5.3.5 SCTP Receive Information Structure */
 329 #define SCTP_RCVINFO    SCTP_RCVINFO
 330         SCTP_NXTINFO,           /* 5.3.6 SCTP Next Receive Information Structure */
 331 #define SCTP_NXTINFO    SCTP_NXTINFO
 332         SCTP_PRINFO,            /* 5.3.7 SCTP PR-SCTP Information Structure */
 333 #define SCTP_PRINFO     SCTP_PRINFO
 334         SCTP_AUTHINFO,          /* 5.3.8 SCTP AUTH Information Structure */
 335 #define SCTP_AUTHINFO   SCTP_AUTHINFO
 336         SCTP_DSTADDRV4,         /* 5.3.9 SCTP Destination IPv4 Address Structure */
 337 #define SCTP_DSTADDRV4  SCTP_DSTADDRV4
 338         SCTP_DSTADDRV6,         /* 5.3.10 SCTP Destination IPv6 Address Structure */
 339 #define SCTP_DSTADDRV6  SCTP_DSTADDRV6
 340 } sctp_cmsg_t;
 341
 342 /*
 343  * 5.3.1.1 SCTP_ASSOC_CHANGE
 344  *
 345  *   Communication notifications inform the ULP that an SCTP association
 346  *   has either begun or ended. The identifier for a new association is
 347  *   provided by this notificaion. The notification information has the
 348  *   following format:
 349  *
 350  */
 351 struct sctp_assoc_change {
 352         __u16 sac_type;
 353         __u16 sac_flags;
 354         __u32 sac_length;
 355         __u16 sac_state;
 356         __u16 sac_error;
 357         __u16 sac_outbound_streams;
 358         __u16 sac_inbound_streams;
 359         sctp_assoc_t sac_assoc_id;
 360         __u8 sac_info[0];
 361 };
 362
 363 /*
 364  *   sac_state: 32 bits (signed integer)
 365  *
 366  *   This field holds one of a number of values that communicate the
 367  *   event that happened to the association.  They include:
 368  *
 369  *   Note:  The following state names deviate from the API draft as
 370  *   the names clash too easily with other kernel symbols.
 371  */
 372 enum sctp_sac_state {
 373         SCTP_COMM_UP,
 374         SCTP_COMM_LOST,
 375         SCTP_RESTART,
 376         SCTP_SHUTDOWN_COMP,
 377         SCTP_CANT_STR_ASSOC,
 378 };
 379
 380 /*
 381  * 5.3.1.2 SCTP_PEER_ADDR_CHANGE
 382  *
 383  *   When a destination address on a multi-homed peer encounters a change
 384  *   an interface details event is sent.  The information has the
 385  *   following structure:
 386  */
 387 struct sctp_paddr_change {
 388         __u16 spc_type;
 389         __u16 spc_flags;
 390         __u32 spc_length;
 391         struct sockaddr_storage spc_aaddr;
 392         int spc_state;
 393         int spc_error;
 394         sctp_assoc_t spc_assoc_id;
 395 } __attribute__((packed, aligned(4)));
 396
 397 /*
 398  *    spc_state:  32 bits (signed integer)
 399  *
 400  *   This field holds one of a number of values that communicate the
 401  *   event that happened to the address.  They include:
 402  */
 403 enum sctp_spc_state {
 404         SCTP_ADDR_AVAILABLE,
 405         SCTP_ADDR_UNREACHABLE,
 406         SCTP_ADDR_REMOVED,
 407         SCTP_ADDR_ADDED,
 408         SCTP_ADDR_MADE_PRIM,
 409         SCTP_ADDR_CONFIRMED,
 410 };
 411
 412
 413 /*
 414  * 5.3.1.3 SCTP_REMOTE_ERROR
 415  *
 416  *   A remote peer may send an Operational Error message to its peer.
 417  *   This message indicates a variety of error conditions on an
 418  *   association. The entire error TLV as it appears on the wire is
 419  *   included in a SCTP_REMOTE_ERROR event.  Please refer to the SCTP
 420  *   specification [SCTP] and any extensions for a list of possible
 421  *   error formats. SCTP error TLVs have the format:
 422  */
 423 struct sctp_remote_error {
 424         __u16 sre_type;
 425         __u16 sre_flags;
 426         __u32 sre_length;
 427         __be16 sre_error;
 428         sctp_assoc_t sre_assoc_id;
 429         __u8 sre_data[0];
 430 };
 431
 432
 433 /*
 434  * 5.3.1.4 SCTP_SEND_FAILED
 435  *
 436  *   If SCTP cannot deliver a message it may return the message as a
 437  *   notification.
 438  */
 439 struct sctp_send_failed {
 440         __u16 ssf_type;
 441         __u16 ssf_flags;
 442         __u32 ssf_length;
 443         __u32 ssf_error;
 444         struct sctp_sndrcvinfo ssf_info;
 445         sctp_assoc_t ssf_assoc_id;
 446         __u8 ssf_data[0];
 447 };
 448
 449 /*
 450  *   ssf_flags: 16 bits (unsigned integer)
 451  *
 452  *   The flag value will take one of the following values
 453  *
 454  *   SCTP_DATA_UNSENT  - Indicates that the data was never put on
 455  *                       the wire.
 456  *
 457  *   SCTP_DATA_SENT    - Indicates that the data was put on the wire.
 458  *                       Note that this does not necessarily mean that the
 459  *                       data was (or was not) successfully delivered.
 460  */
 461 enum sctp_ssf_flags {
 462         SCTP_DATA_UNSENT,
 463         SCTP_DATA_SENT,
 464 };
 465
 466 /*
 467  * 5.3.1.5 SCTP_SHUTDOWN_EVENT
 468  *
 469  *   When a peer sends a SHUTDOWN, SCTP delivers this notification to
 470  *   inform the application that it should cease sending data.
 471  */
 472 struct sctp_shutdown_event {
 473         __u16 sse_type;
 474         __u16 sse_flags;
 475         __u32 sse_length;
 476         sctp_assoc_t sse_assoc_id;
 477 };
 478
 479 /*
 480  * 5.3.1.6 SCTP_ADAPTATION_INDICATION
 481  *
 482  *   When a peer sends a Adaptation Layer Indication parameter , SCTP
 483  *   delivers this notification to inform the application
 484  *   that of the peers requested adaptation layer.
 485  */
 486 struct sctp_adaptation_event {
 487         __u16 sai_type;
 488         __u16 sai_flags;
 489         __u32 sai_length;
 490         __u32 sai_adaptation_ind;
 491         sctp_assoc_t sai_assoc_id;
 492 };
 493
 494 /*
 495  * 5.3.1.7 SCTP_PARTIAL_DELIVERY_EVENT
 496  *
 497  *   When a receiver is engaged in a partial delivery of a
 498  *   message this notification will be used to indicate
 499  *   various events.
 500  */
 501 struct sctp_pdapi_event {
 502         __u16 pdapi_type;
 503         __u16 pdapi_flags;
 504         __u32 pdapi_length;
 505         __u32 pdapi_indication;
 506         sctp_assoc_t pdapi_assoc_id;
 507         __u32 pdapi_stream;
 508         __u32 pdapi_seq;
 509 };
 510
 511 enum { SCTP_PARTIAL_DELIVERY_ABORTED=0, };
 512
 513 /*
 514  * 5.3.1.8.  SCTP_AUTHENTICATION_EVENT
 515  *
 516  *  When a receiver is using authentication this message will provide
 517  *  notifications regarding new keys being made active as well as errors.
 518  */
 519 struct sctp_authkey_event {
 520         __u16 auth_type;
 521         __u16 auth_flags;
 522         __u32 auth_length;
 523         __u16 auth_keynumber;
 524         __u16 auth_altkeynumber;
 525         __u32 auth_indication;
 526         sctp_assoc_t auth_assoc_id;
 527 };
 528
 529 enum {
 530         SCTP_AUTH_NEW_KEY,
 531 #define SCTP_AUTH_NEWKEY        SCTP_AUTH_NEW_KEY /* compatible with before */
 532         SCTP_AUTH_FREE_KEY,
 533         SCTP_AUTH_NO_AUTH,
 534 };
 535
 536 /*
 537  * 6.1.9. SCTP_SENDER_DRY_EVENT
 538  *
 539  * When the SCTP stack has no more user data to send or retransmit, this
 540  * notification is given to the user. Also, at the time when a user app
 541  * subscribes to this event, if there is no data to be sent or
 542  * retransmit, the stack will immediately send up this notification.
 543  */
 544 struct sctp_sender_dry_event {
 545         __u16 sender_dry_type;
 546         __u16 sender_dry_flags;
 547         __u32 sender_dry_length;
 548         sctp_assoc_t sender_dry_assoc_id;
 549 };
 550
 551 #define SCTP_STREAM_RESET_INCOMING_SSN  0x0001
 552 #define SCTP_STREAM_RESET_OUTGOING_SSN  0x0002
 553 #define SCTP_STREAM_RESET_DENIED        0x0004
 554 #define SCTP_STREAM_RESET_FAILED        0x0008
 555 struct sctp_stream_reset_event {
 556         __u16 strreset_type;
 557         __u16 strreset_flags;
 558         __u32 strreset_length;
 559         sctp_assoc_t strreset_assoc_id;
 560         __u16 strreset_stream_list[];
 561 };
 562
 563 #define SCTP_ASSOC_RESET_DENIED         0x0004
 564 #define SCTP_ASSOC_RESET_FAILED         0x0008
 565 struct sctp_assoc_reset_event {
 566         __u16 assocreset_type;
 567         __u16 assocreset_flags;
 568         __u32 assocreset_length;
 569         sctp_assoc_t assocreset_assoc_id;
 570         __u32 assocreset_local_tsn;
 571         __u32 assocreset_remote_tsn;
 572 };
 573
 574 #define SCTP_ASSOC_CHANGE_DENIED        0x0004
 575 #define SCTP_ASSOC_CHANGE_FAILED        0x0008
 576 #define SCTP_STREAM_CHANGE_DENIED       SCTP_ASSOC_CHANGE_DENIED
 577 #define SCTP_STREAM_CHANGE_FAILED       SCTP_ASSOC_CHANGE_FAILED
 578 struct sctp_stream_change_event {
 579         __u16 strchange_type;
 580         __u16 strchange_flags;
 581         __u32 strchange_length;
 582         sctp_assoc_t strchange_assoc_id;
 583         __u16 strchange_instrms;
 584         __u16 strchange_outstrms;
 585 };
 586
 587 /*
 588  * Described in Section 7.3
 589  *   Ancillary Data and Notification Interest Options
 590  */
 591 struct sctp_event_subscribe {
 592         __u8 sctp_data_io_event;
 593         __u8 sctp_association_event;
 594         __u8 sctp_address_event;
 595         __u8 sctp_send_failure_event;
 596         __u8 sctp_peer_error_event;
 597         __u8 sctp_shutdown_event;
 598         __u8 sctp_partial_delivery_event;
 599         __u8 sctp_adaptation_layer_event;
 600         __u8 sctp_authentication_event;
 601         __u8 sctp_sender_dry_event;
 602         __u8 sctp_stream_reset_event;
 603         __u8 sctp_assoc_reset_event;
 604         __u8 sctp_stream_change_event;
 605 };
 606
 607 /*
 608  * 5.3.1 SCTP Notification Structure
 609  *
 610  *   The notification structure is defined as the union of all
 611  *   notification types.
 612  *
 613  */
 614 union sctp_notification {
 615         struct {
 616                 __u16 sn_type;             /* Notification type. */
 617                 __u16 sn_flags;
 618                 __u32 sn_length;
 619         } sn_header;
 620         struct sctp_assoc_change sn_assoc_change;
 621         struct sctp_paddr_change sn_paddr_change;
 622         struct sctp_remote_error sn_remote_error;
 623         struct sctp_send_failed sn_send_failed;
 624         struct sctp_shutdown_event sn_shutdown_event;
 625         struct sctp_adaptation_event sn_adaptation_event;
 626         struct sctp_pdapi_event sn_pdapi_event;
 627         struct sctp_authkey_event sn_authkey_event;
 628         struct sctp_sender_dry_event sn_sender_dry_event;
 629         struct sctp_stream_reset_event sn_strreset_event;
 630         struct sctp_assoc_reset_event sn_assocreset_event;
 631         struct sctp_stream_change_event sn_strchange_event;
 632 };
 633
 634 /* Section 5.3.1
 635  * All standard values for sn_type flags are greater than 2^15.
 636  * Values from 2^15 and down are reserved.
 637  */
 638
 639 enum sctp_sn_type {
 640         SCTP_SN_TYPE_BASE       = (1<<15),
 641         SCTP_DATA_IO_EVENT      = SCTP_SN_TYPE_BASE,
 642 #define SCTP_DATA_IO_EVENT              SCTP_DATA_IO_EVENT
 643         SCTP_ASSOC_CHANGE,
 644 #define SCTP_ASSOC_CHANGE               SCTP_ASSOC_CHANGE
 645         SCTP_PEER_ADDR_CHANGE,
 646 #define SCTP_PEER_ADDR_CHANGE           SCTP_PEER_ADDR_CHANGE
 647         SCTP_SEND_FAILED,
 648 #define SCTP_SEND_FAILED                SCTP_SEND_FAILED
 649         SCTP_REMOTE_ERROR,
 650 #define SCTP_REMOTE_ERROR               SCTP_REMOTE_ERROR
 651         SCTP_SHUTDOWN_EVENT,
 652 #define SCTP_SHUTDOWN_EVENT             SCTP_SHUTDOWN_EVENT
 653         SCTP_PARTIAL_DELIVERY_EVENT,
 654 #define SCTP_PARTIAL_DELIVERY_EVENT     SCTP_PARTIAL_DELIVERY_EVENT
 655         SCTP_ADAPTATION_INDICATION,
 656 #define SCTP_ADAPTATION_INDICATION      SCTP_ADAPTATION_INDICATION
 657         SCTP_AUTHENTICATION_EVENT,
 658 #define SCTP_AUTHENTICATION_INDICATION  SCTP_AUTHENTICATION_EVENT
 659         SCTP_SENDER_DRY_EVENT,
 660 #define SCTP_SENDER_DRY_EVENT           SCTP_SENDER_DRY_EVENT
 661         SCTP_STREAM_RESET_EVENT,
 662 #define SCTP_STREAM_RESET_EVENT         SCTP_STREAM_RESET_EVENT
 663         SCTP_ASSOC_RESET_EVENT,
 664 #define SCTP_ASSOC_RESET_EVENT          SCTP_ASSOC_RESET_EVENT
 665         SCTP_STREAM_CHANGE_EVENT,
 666 #define SCTP_STREAM_CHANGE_EVENT        SCTP_STREAM_CHANGE_EVENT
 667         SCTP_SN_TYPE_MAX        = SCTP_STREAM_CHANGE_EVENT,
 668 #define SCTP_SN_TYPE_MAX                SCTP_SN_TYPE_MAX
 669 };
 670
 671 /* Notification error codes used to fill up the error fields in some
 672  * notifications.
 673  * SCTP_PEER_ADDRESS_CHAGE      : spc_error
 674  * SCTP_ASSOC_CHANGE            : sac_error
 675  * These names should be potentially included in the draft 04 of the SCTP
 676  * sockets API specification.
 677  */
 678 typedef enum sctp_sn_error {
 679         SCTP_FAILED_THRESHOLD,
 680         SCTP_RECEIVED_SACK,
 681         SCTP_HEARTBEAT_SUCCESS,
 682         SCTP_RESPONSE_TO_USER_REQ,
 683         SCTP_INTERNAL_ERROR,
 684         SCTP_SHUTDOWN_GUARD_EXPIRES,
 685         SCTP_PEER_FAULTY,
 686 } sctp_sn_error_t;
 687
 688 /*
 689  * 7.1.1 Retransmission Timeout Parameters (SCTP_RTOINFO)
 690  *
 691  *   The protocol parameters used to initialize and bound retransmission
 692  *   timeout (RTO) are tunable.  See [SCTP] for more information on how
 693  *   these parameters are used in RTO calculation.
 694  */
 695 struct sctp_rtoinfo {
 696         sctp_assoc_t    srto_assoc_id;
 697         __u32           srto_initial;
 698         __u32           srto_max;
 699         __u32           srto_min;
 700 };
 701
 702 /*
 703  * 7.1.2 Association Parameters (SCTP_ASSOCINFO)
 704  *
 705  *   This option is used to both examine and set various association and
 706  *   endpoint parameters.
 707  */
 708 struct sctp_assocparams {
 709         sctp_assoc_t    sasoc_assoc_id;
 710         __u16           sasoc_asocmaxrxt;
 711         __u16           sasoc_number_peer_destinations;
 712         __u32           sasoc_peer_rwnd;
 713         __u32           sasoc_local_rwnd;
 714         __u32           sasoc_cookie_life;
 715 };
 716
 717 /*
 718  * 7.1.9 Set Peer Primary Address (SCTP_SET_PEER_PRIMARY_ADDR)
 719  *
 720  *  Requests that the peer mark the enclosed address as the association
 721  *  primary. The enclosed address must be one of the association's
 722  *  locally bound addresses. The following structure is used to make a
 723  *   set primary request:
 724  */
 725 struct sctp_setpeerprim {
 726         sctp_assoc_t            sspp_assoc_id;
 727         struct sockaddr_storage sspp_addr;
 728 } __attribute__((packed, aligned(4)));
 729
 730 /*
 731  * 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR)
 732  *
 733  *  Requests that the local SCTP stack use the enclosed peer address as
 734  *  the association primary. The enclosed address must be one of the
 735  *  association peer's addresses. The following structure is used to
 736  *  make a set peer primary request:
 737  */
 738 struct sctp_prim {
 739         sctp_assoc_t            ssp_assoc_id;
 740         struct sockaddr_storage ssp_addr;
 741 } __attribute__((packed, aligned(4)));
 742
 743 /* For backward compatibility use, define the old name too */
 744 #define sctp_setprim    sctp_prim
 745
 746 /*
 747  * 7.1.11 Set Adaptation Layer Indicator (SCTP_ADAPTATION_LAYER)
 748  *
 749  * Requests that the local endpoint set the specified Adaptation Layer
 750  * Indication parameter for all future INIT and INIT-ACK exchanges.
 751  */
 752 struct sctp_setadaptation {
 753         __u32   ssb_adaptation_ind;
 754 };
 755
 756 /*
 757  * 7.1.13 Peer Address Parameters  (SCTP_PEER_ADDR_PARAMS)
 758  *
 759  *   Applications can enable or disable heartbeats for any peer address
 760  *   of an association, modify an address's heartbeat interval, force a
 761  *   heartbeat to be sent immediately, and adjust the address's maximum
 762  *   number of retransmissions sent before an address is considered
 763  *   unreachable. The following structure is used to access and modify an
 764  *   address's parameters:
 765  */
 766 enum  sctp_spp_flags {
 767         SPP_HB_ENABLE = 1<<0,           /*Enable heartbeats*/
 768         SPP_HB_DISABLE = 1<<1,          /*Disable heartbeats*/
 769         SPP_HB = SPP_HB_ENABLE | SPP_HB_DISABLE,
 770         SPP_HB_DEMAND = 1<<2,           /*Send heartbeat immediately*/
 771         SPP_PMTUD_ENABLE = 1<<3,        /*Enable PMTU discovery*/
 772         SPP_PMTUD_DISABLE = 1<<4,       /*Disable PMTU discovery*/
 773         SPP_PMTUD = SPP_PMTUD_ENABLE | SPP_PMTUD_DISABLE,
 774         SPP_SACKDELAY_ENABLE = 1<<5,    /*Enable SACK*/
 775         SPP_SACKDELAY_DISABLE = 1<<6,   /*Disable SACK*/
 776         SPP_SACKDELAY = SPP_SACKDELAY_ENABLE | SPP_SACKDELAY_DISABLE,
 777         SPP_HB_TIME_IS_ZERO = 1<<7,     /* Set HB delay to 0 */
 778         SPP_IPV6_FLOWLABEL = 1<<8,
 779         SPP_DSCP = 1<<9,
 780 };
 781
 782 struct sctp_paddrparams {
 783         sctp_assoc_t            spp_assoc_id;
 784         struct sockaddr_storage spp_address;
 785         __u32                   spp_hbinterval;
 786         __u16                   spp_pathmaxrxt;
 787         __u32                   spp_pathmtu;
 788         __u32                   spp_sackdelay;
 789         __u32                   spp_flags;
 790         __u32                   spp_ipv6_flowlabel;
 791         __u8                    spp_dscp;
 792 } __attribute__((packed, aligned(4)));
 793
 794 /*
 795  * 7.1.18.  Add a chunk that must be authenticated (SCTP_AUTH_CHUNK)
 796  *
 797  * This set option adds a chunk type that the user is requesting to be
 798  * received only in an authenticated way.  Changes to the list of chunks
 799  * will only effect future associations on the socket.
 800  */
 801 struct sctp_authchunk {
 802         __u8            sauth_chunk;
 803 };
 804
 805 /*
 806  * 7.1.19.  Get or set the list of supported HMAC Identifiers (SCTP_HMAC_IDENT)
 807  *
 808  * This option gets or sets the list of HMAC algorithms that the local
 809  * endpoint requires the peer to use.
 810  */
 811 /* This here is only used by user space as is. It might not be a good idea
 812  * to export/reveal the whole structure with reserved fields etc.
 813  */
 814 enum {
 815         SCTP_AUTH_HMAC_ID_SHA1 = 1,
 816         SCTP_AUTH_HMAC_ID_SHA256 = 3,
 817 };
 818
 819 struct sctp_hmacalgo {
 820         __u32           shmac_num_idents;
 821         __u16           shmac_idents[];
 822 };
 823
 824 /* Sadly, user and kernel space have different names for
 825  * this structure member, so this is to not break anything.
 826  */
 827 #define shmac_number_of_idents  shmac_num_idents
 828
 829 /*
 830  * 7.1.20.  Set a shared key (SCTP_AUTH_KEY)
 831  *
 832  * This option will set a shared secret key which is used to build an
 833  * association shared key.
 834  */
 835 struct sctp_authkey {
 836         sctp_assoc_t    sca_assoc_id;
 837         __u16           sca_keynumber;
 838         __u16           sca_keylength;
 839         __u8            sca_key[];
 840 };
 841
 842 /*
 843  * 7.1.21.  Get or set the active shared key (SCTP_AUTH_ACTIVE_KEY)
 844  *
 845  * This option will get or set the active shared key to be used to build
 846  * the association shared key.
 847  */
 848
 849 struct sctp_authkeyid {
 850         sctp_assoc_t    scact_assoc_id;
 851         __u16           scact_keynumber;
 852 };
 853
 854
 855 /*
 856  * 7.1.23.  Get or set delayed ack timer (SCTP_DELAYED_SACK)
 857  *
 858  * This option will effect the way delayed acks are performed.  This
 859  * option allows you to get or set the delayed ack time, in
 860  * milliseconds.  It also allows changing the delayed ack frequency.
 861  * Changing the frequency to 1 disables the delayed sack algorithm.  If
 862  * the assoc_id is 0, then this sets or gets the endpoints default
 863  * values.  If the assoc_id field is non-zero, then the set or get
 864  * effects the specified association for the one to many model (the
 865  * assoc_id field is ignored by the one to one model).  Note that if
 866  * sack_delay or sack_freq are 0 when setting this option, then the
 867  * current values will remain unchanged.
 868  */
 869 struct sctp_sack_info {
 870         sctp_assoc_t    sack_assoc_id;
 871         uint32_t        sack_delay;
 872         uint32_t        sack_freq;
 873 };
 874
 875 struct sctp_assoc_value {
 876     sctp_assoc_t            assoc_id;
 877     uint32_t                assoc_value;
 878 };
 879
 880 struct sctp_stream_value {
 881         sctp_assoc_t assoc_id;
 882         uint16_t stream_id;
 883         uint16_t stream_value;
 884 };
 885
 886 /*
 887  * 7.2.2 Peer Address Information
 888  *
 889  *   Applications can retrieve information about a specific peer address
 890  *   of an association, including its reachability state, congestion
 891  *   window, and retransmission timer values.  This information is
 892  *   read-only. The following structure is used to access this
 893  *   information:
 894  */
 895 struct sctp_paddrinfo {
 896         sctp_assoc_t            spinfo_assoc_id;
 897         struct sockaddr_storage spinfo_address;
 898         __s32                   spinfo_state;
 899         __u32                   spinfo_cwnd;
 900         __u32                   spinfo_srtt;
 901         __u32                   spinfo_rto;
 902         __u32                   spinfo_mtu;
 903 } __attribute__((packed, aligned(4)));
 904
 905 /* Peer addresses's state. */
 906 /* UNKNOWN: Peer address passed by the upper layer in sendmsg or connect[x]
 907  * calls.
 908  * UNCONFIRMED: Peer address received in INIT/INIT-ACK address parameters.
 909  *              Not yet confirmed by a heartbeat and not available for data
 910  *              transfers.
 911  * ACTIVE : Peer address confirmed, active and available for data transfers.
 912  * INACTIVE: Peer address inactive and not available for data transfers.
 913  */
 914 enum sctp_spinfo_state {
 915         SCTP_INACTIVE,
 916         SCTP_PF,
 917         SCTP_ACTIVE,
 918         SCTP_UNCONFIRMED,
 919         SCTP_UNKNOWN = 0xffff  /* Value used for transport state unknown */
 920 };
 921
 922 /*
 923  * 7.2.1 Association Status (SCTP_STATUS)
 924  *
 925  *   Applications can retrieve current status information about an
 926  *   association, including association state, peer receiver window size,
 927  *   number of unacked data chunks, and number of data chunks pending
 928  *   receipt.  This information is read-only.  The following structure is
 929  *   used to access this information:
 930  */
 931 struct sctp_status {
 932         sctp_assoc_t            sstat_assoc_id;
 933         __s32                   sstat_state;
 934         __u32                   sstat_rwnd;
 935         __u16                   sstat_unackdata;
 936         __u16                   sstat_penddata;
 937         __u16                   sstat_instrms;
 938         __u16                   sstat_outstrms;
 939         __u32                   sstat_fragmentation_point;
 940         struct sctp_paddrinfo   sstat_primary;
 941 };
 942
 943 /*
 944  * 7.2.3.  Get the list of chunks the peer requires to be authenticated
 945  *         (SCTP_PEER_AUTH_CHUNKS)
 946  *
 947  * This option gets a list of chunks for a specified association that
 948  * the peer requires to be received authenticated only.
 949  */
 950 struct sctp_authchunks {
 951         sctp_assoc_t    gauth_assoc_id;
 952         __u32           gauth_number_of_chunks;
 953         uint8_t         gauth_chunks[];
 954 };
 955
 956 /* The broken spelling has been released already in lksctp-tools header,
 957  * so don't break anyone, now that it's fixed.
 958  */
 959 #define guth_number_of_chunks   gauth_number_of_chunks
 960
 961 /* Association states.  */
 962 enum sctp_sstat_state {
 963         SCTP_EMPTY                = 0,
 964         SCTP_CLOSED               = 1,
 965         SCTP_COOKIE_WAIT          = 2,
 966         SCTP_COOKIE_ECHOED        = 3,
 967         SCTP_ESTABLISHED          = 4,
 968         SCTP_SHUTDOWN_PENDING     = 5,
 969         SCTP_SHUTDOWN_SENT        = 6,
 970         SCTP_SHUTDOWN_RECEIVED    = 7,
 971         SCTP_SHUTDOWN_ACK_SENT    = 8,
 972 };
 973
 974 /*
 975  * 8.2.6. Get the Current Identifiers of Associations
 976  *        (SCTP_GET_ASSOC_ID_LIST)
 977  *
 978  * This option gets the current list of SCTP association identifiers of
 979  * the SCTP associations handled by a one-to-many style socket.
 980  */
 981 struct sctp_assoc_ids {
 982         __u32           gaids_number_of_ids;
 983         sctp_assoc_t    gaids_assoc_id[];
 984 };
 985
 986 /*
 987  * 8.3, 8.5 get all peer/local addresses in an association.
 988  * This parameter struct is used by SCTP_GET_PEER_ADDRS and
 989  * SCTP_GET_LOCAL_ADDRS socket options used internally to implement
 990  * sctp_getpaddrs() and sctp_getladdrs() API.
 991  */
 992 struct sctp_getaddrs_old {
 993         sctp_assoc_t            assoc_id;
 994         int                     addr_num;
 995         struct sockaddr         *addrs;
 996 };
 997
 998 struct sctp_getaddrs {
 999         sctp_assoc_t            assoc_id; /*input*/
1000         __u32                   addr_num; /*output*/
1001         __u8                    addrs[0]; /*output, variable size*/
1002 };
1003
1004 /* A socket user request obtained via SCTP_GET_ASSOC_STATS that retrieves
1005  * association stats. All stats are counts except sas_maxrto and
1006  * sas_obs_rto_ipaddr. maxrto is the max observed rto + transport since
1007  * the last call. Will return 0 when RTO was not update since last call
1008  */
1009 struct sctp_assoc_stats {
1010         sctp_assoc_t    sas_assoc_id;    /* Input */
1011                                          /* Transport of observed max RTO */
1012         struct sockaddr_storage sas_obs_rto_ipaddr;
1013         __u64           sas_maxrto;      /* Maximum Observed RTO for period */
1014         __u64           sas_isacks;      /* SACKs received */
1015         __u64           sas_osacks;      /* SACKs sent */
1016         __u64           sas_opackets;    /* Packets sent */
1017         __u64           sas_ipackets;    /* Packets received */
1018         __u64           sas_rtxchunks;   /* Retransmitted Chunks */
1019         __u64           sas_outofseqtsns;/* TSN received > next expected */
1020         __u64           sas_idupchunks;  /* Dups received (ordered+unordered) */
1021         __u64           sas_gapcnt;      /* Gap Acknowledgements Received */
1022         __u64           sas_ouodchunks;  /* Unordered data chunks sent */
1023         __u64           sas_iuodchunks;  /* Unordered data chunks received */
1024         __u64           sas_oodchunks;   /* Ordered data chunks sent */
1025         __u64           sas_iodchunks;   /* Ordered data chunks received */
1026         __u64           sas_octrlchunks; /* Control chunks sent */
1027         __u64           sas_ictrlchunks; /* Control chunks received */
1028 };
1029
1030 /*
1031  * 8.1 sctp_bindx()
1032  *
1033  * The flags parameter is formed from the bitwise OR of zero or more of the
1034  * following currently defined flags:
1035  */
1036 #define SCTP_BINDX_ADD_ADDR 0x01
1037 #define SCTP_BINDX_REM_ADDR 0x02
1038
1039 /* This is the structure that is passed as an argument(optval) to
1040  * getsockopt(SCTP_SOCKOPT_PEELOFF).
1041  */
1042 typedef struct {
1043         sctp_assoc_t associd;
1044         int sd;
1045 } sctp_peeloff_arg_t;
1046
1047 typedef struct {
1048         sctp_peeloff_arg_t p_arg;
1049         unsigned flags;
1050 } sctp_peeloff_flags_arg_t;
1051
1052 /*
1053  *  Peer Address Thresholds socket option
1054  */
1055 struct sctp_paddrthlds {
1056         sctp_assoc_t spt_assoc_id;
1057         struct sockaddr_storage spt_address;
1058         __u16 spt_pathmaxrxt;
1059         __u16 spt_pathpfthld;
1060 };
1061
1062 /*
1063  * Socket Option for Getting the Association/Stream-Specific PR-SCTP Status
1064  */
1065 struct sctp_prstatus {
1066         sctp_assoc_t sprstat_assoc_id;
1067         __u16 sprstat_sid;
1068         __u16 sprstat_policy;
1069         __u64 sprstat_abandoned_unsent;
1070         __u64 sprstat_abandoned_sent;
1071 };
1072
1073 struct sctp_default_prinfo {
1074         sctp_assoc_t pr_assoc_id;
1075         __u32 pr_value;
1076         __u16 pr_policy;
1077 };
1078
1079 struct sctp_info {
1080         __u32   sctpi_tag;
1081         __u32   sctpi_state;
1082         __u32   sctpi_rwnd;
1083         __u16   sctpi_unackdata;
1084         __u16   sctpi_penddata;
1085         __u16   sctpi_instrms;
1086         __u16   sctpi_outstrms;
1087         __u32   sctpi_fragmentation_point;
1088         __u32   sctpi_inqueue;
1089         __u32   sctpi_outqueue;
1090         __u32   sctpi_overall_error;
1091         __u32   sctpi_max_burst;
1092         __u32   sctpi_maxseg;
1093         __u32   sctpi_peer_rwnd;
1094         __u32   sctpi_peer_tag;
1095         __u8    sctpi_peer_capable;
1096         __u8    sctpi_peer_sack;
1097         __u16   __reserved1;
1098
1099         /* assoc status info */
1100         __u64   sctpi_isacks;
1101         __u64   sctpi_osacks;
1102         __u64   sctpi_opackets;
1103         __u64   sctpi_ipackets;
1104         __u64   sctpi_rtxchunks;
1105         __u64   sctpi_outofseqtsns;
1106         __u64   sctpi_idupchunks;
1107         __u64   sctpi_gapcnt;
1108         __u64   sctpi_ouodchunks;
1109         __u64   sctpi_iuodchunks;
1110         __u64   sctpi_oodchunks;
1111         __u64   sctpi_iodchunks;
1112         __u64   sctpi_octrlchunks;
1113         __u64   sctpi_ictrlchunks;
1114
1115         /* primary transport info */
1116         struct sockaddr_storage sctpi_p_address;
1117         __s32   sctpi_p_state;
1118         __u32   sctpi_p_cwnd;
1119         __u32   sctpi_p_srtt;
1120         __u32   sctpi_p_rto;
1121         __u32   sctpi_p_hbinterval;
1122         __u32   sctpi_p_pathmaxrxt;
1123         __u32   sctpi_p_sackdelay;
1124         __u32   sctpi_p_sackfreq;
1125         __u32   sctpi_p_ssthresh;
1126         __u32   sctpi_p_partial_bytes_acked;
1127         __u32   sctpi_p_flight_size;
1128         __u16   sctpi_p_error;
1129         __u16   __reserved2;
1130
1131         /* sctp sock info */
1132         __u32   sctpi_s_autoclose;
1133         __u32   sctpi_s_adaptation_ind;
1134         __u32   sctpi_s_pd_point;
1135         __u8    sctpi_s_nodelay;
1136         __u8    sctpi_s_disable_fragments;
1137         __u8    sctpi_s_v4mapped;
1138         __u8    sctpi_s_frag_interleave;
1139         __u32   sctpi_s_type;
1140         __u32   __reserved3;
1141 };
1142
1143 struct sctp_reset_streams {
1144         sctp_assoc_t srs_assoc_id;
1145         uint16_t srs_flags;
1146         uint16_t srs_number_streams;    /* 0 == ALL */
1147         uint16_t srs_stream_list[];     /* list if srs_num_streams is not 0 */
1148 };
1149
1150 struct sctp_add_streams {
1151         sctp_assoc_t sas_assoc_id;
1152         uint16_t sas_instrms;
1153         uint16_t sas_outstrms;
1154 };
1155
1156 struct sctp_event {
1157         sctp_assoc_t se_assoc_id;
1158         uint16_t se_type;
1159         uint8_t se_on;
1160 };
1161
1162 /* SCTP Stream schedulers */
1163 enum sctp_sched_type {
1164         SCTP_SS_FCFS,
1165         SCTP_SS_DEFAULT = SCTP_SS_FCFS,
1166         SCTP_SS_PRIO,
1167         SCTP_SS_RR,
1168         SCTP_SS_MAX = SCTP_SS_RR
1169 };
1170
1171 #endif /* _SCTP_H */