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