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