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 #define SCTP_PEER_ADDR_THLDS_V2 37
 109
 110 /* Internal Socket Options. Some of the sctp library functions are
 111  * implemented using these socket options.
 112  */
 113 #define SCTP_SOCKOPT_BINDX_ADD  100     /* BINDX requests for adding addrs */
 114 #define SCTP_SOCKOPT_BINDX_REM  101     /* BINDX requests for removing addrs. */
 115 #define SCTP_SOCKOPT_PEELOFF    102     /* peel off association. */
 116 /* Options 104-106 are deprecated and removed. Do not use this space */
 117 #define SCTP_SOCKOPT_CONNECTX_OLD       107     /* CONNECTX old requests. */
 118 #define SCTP_GET_PEER_ADDRS     108             /* Get all peer address. */
 119 #define SCTP_GET_LOCAL_ADDRS    109             /* Get all local address. */
 120 #define SCTP_SOCKOPT_CONNECTX   110             /* CONNECTX requests. */
 121 #define SCTP_SOCKOPT_CONNECTX3  111     /* CONNECTX requests (updated) */
 122 #define SCTP_GET_ASSOC_STATS    112     /* Read only */
 123 #define SCTP_PR_SUPPORTED       113
 124 #define SCTP_DEFAULT_PRINFO     114
 125 #define SCTP_PR_ASSOC_STATUS    115
 126 #define SCTP_PR_STREAM_STATUS   116
 127 #define SCTP_RECONFIG_SUPPORTED 117
 128 #define SCTP_ENABLE_STREAM_RESET        118
 129 #define SCTP_RESET_STREAMS      119
 130 #define SCTP_RESET_ASSOC        120
 131 #define SCTP_ADD_STREAMS        121
 132 #define SCTP_SOCKOPT_PEELOFF_FLAGS 122
 133 #define SCTP_STREAM_SCHEDULER   123
 134 #define SCTP_STREAM_SCHEDULER_VALUE     124
 135 #define SCTP_INTERLEAVING_SUPPORTED     125
 136 #define SCTP_SENDMSG_CONNECT    126
 137 #define SCTP_EVENT      127
 138 #define SCTP_ASCONF_SUPPORTED   128
 139 #define SCTP_AUTH_SUPPORTED     129
 140 #define SCTP_ECN_SUPPORTED      130
 141 #define SCTP_EXPOSE_POTENTIALLY_FAILED_STATE    131
 142 #define SCTP_EXPOSE_PF_STATE    SCTP_EXPOSE_POTENTIALLY_FAILED_STATE
 143 #define SCTP_REMOTE_UDP_ENCAPS_PORT     132
 144
 145 /* PR-SCTP policies */
 146 #define SCTP_PR_SCTP_NONE       0x0000
 147 #define SCTP_PR_SCTP_TTL        0x0010
 148 #define SCTP_PR_SCTP_RTX        0x0020
 149 #define SCTP_PR_SCTP_PRIO       0x0030
 150 #define SCTP_PR_SCTP_MAX        SCTP_PR_SCTP_PRIO
 151 #define SCTP_PR_SCTP_MASK       0x0030
 152
 153 #define __SCTP_PR_INDEX(x)      ((x >> 4) - 1)
 154 #define SCTP_PR_INDEX(x)        __SCTP_PR_INDEX(SCTP_PR_SCTP_ ## x)
 155
 156 #define SCTP_PR_POLICY(x)       ((x) & SCTP_PR_SCTP_MASK)
 157 #define SCTP_PR_SET_POLICY(flags, x)    \
 158         do {                            \
 159                 flags &= ~SCTP_PR_SCTP_MASK;    \
 160                 flags |= x;             \
 161         } while (0)
 162
 163 #define SCTP_PR_TTL_ENABLED(x)  (SCTP_PR_POLICY(x) == SCTP_PR_SCTP_TTL)
 164 #define SCTP_PR_RTX_ENABLED(x)  (SCTP_PR_POLICY(x) == SCTP_PR_SCTP_RTX)
 165 #define SCTP_PR_PRIO_ENABLED(x) (SCTP_PR_POLICY(x) == SCTP_PR_SCTP_PRIO)
 166
 167 /* For enable stream reset */
 168 #define SCTP_ENABLE_RESET_STREAM_REQ    0x01
 169 #define SCTP_ENABLE_RESET_ASSOC_REQ     0x02
 170 #define SCTP_ENABLE_CHANGE_ASSOC_REQ    0x04
 171 #define SCTP_ENABLE_STRRESET_MASK       0x07
 172
 173 #define SCTP_STREAM_RESET_INCOMING      0x01
 174 #define SCTP_STREAM_RESET_OUTGOING      0x02
 175
 176 /* These are bit fields for msghdr->msg_flags.  See section 5.1.  */
 177 /* On user space Linux, these live in <bits/socket.h> as an enum.  */
 178 enum sctp_msg_flags {
 179         MSG_NOTIFICATION = 0x8000,
 180 #define MSG_NOTIFICATION MSG_NOTIFICATION
 181 };
 182
 183 /* 5.3.1 SCTP Initiation Structure (SCTP_INIT)
 184  *
 185  *   This cmsghdr structure provides information for initializing new
 186  *   SCTP associations with sendmsg().  The SCTP_INITMSG socket option
 187  *   uses this same data structure.  This structure is not used for
 188  *   recvmsg().
 189  *
 190  *   cmsg_level    cmsg_type      cmsg_data[]
 191  *   ------------  ------------   ----------------------
 192  *   IPPROTO_SCTP  SCTP_INIT      struct sctp_initmsg
 193  */
 194 struct sctp_initmsg {
 195         __u16 sinit_num_ostreams;
 196         __u16 sinit_max_instreams;
 197         __u16 sinit_max_attempts;
 198         __u16 sinit_max_init_timeo;
 199 };
 200
 201 /* 5.3.2 SCTP Header Information Structure (SCTP_SNDRCV)
 202  *
 203  *   This cmsghdr structure specifies SCTP options for sendmsg() and
 204  *   describes SCTP header information about a received message through
 205  *   recvmsg().
 206  *
 207  *   cmsg_level    cmsg_type      cmsg_data[]
 208  *   ------------  ------------   ----------------------
 209  *   IPPROTO_SCTP  SCTP_SNDRCV    struct sctp_sndrcvinfo
 210  */
 211 struct sctp_sndrcvinfo {
 212         __u16 sinfo_stream;
 213         __u16 sinfo_ssn;
 214         __u16 sinfo_flags;
 215         __u32 sinfo_ppid;
 216         __u32 sinfo_context;
 217         __u32 sinfo_timetolive;
 218         __u32 sinfo_tsn;
 219         __u32 sinfo_cumtsn;
 220         sctp_assoc_t sinfo_assoc_id;
 221 };
 222
 223 /* 5.3.4 SCTP Send Information Structure (SCTP_SNDINFO)
 224  *
 225  *   This cmsghdr structure specifies SCTP options for sendmsg().
 226  *
 227  *   cmsg_level    cmsg_type      cmsg_data[]
 228  *   ------------  ------------   -------------------
 229  *   IPPROTO_SCTP  SCTP_SNDINFO   struct sctp_sndinfo
 230  */
 231 struct sctp_sndinfo {
 232         __u16 snd_sid;
 233         __u16 snd_flags;
 234         __u32 snd_ppid;
 235         __u32 snd_context;
 236         sctp_assoc_t snd_assoc_id;
 237 };
 238
 239 /* 5.3.5 SCTP Receive Information Structure (SCTP_RCVINFO)
 240  *
 241  *   This cmsghdr structure describes SCTP receive information
 242  *   about a received message through recvmsg().
 243  *
 244  *   cmsg_level    cmsg_type      cmsg_data[]
 245  *   ------------  ------------   -------------------
 246  *   IPPROTO_SCTP  SCTP_RCVINFO   struct sctp_rcvinfo
 247  */
 248 struct sctp_rcvinfo {
 249         __u16 rcv_sid;
 250         __u16 rcv_ssn;
 251         __u16 rcv_flags;
 252         __u32 rcv_ppid;
 253         __u32 rcv_tsn;
 254         __u32 rcv_cumtsn;
 255         __u32 rcv_context;
 256         sctp_assoc_t rcv_assoc_id;
 257 };
 258
 259 /* 5.3.6 SCTP Next Receive Information Structure (SCTP_NXTINFO)
 260  *
 261  *   This cmsghdr structure describes SCTP receive information
 262  *   of the next message that will be delivered through recvmsg()
 263  *   if this information is already available when delivering
 264  *   the current message.
 265  *
 266  *   cmsg_level    cmsg_type      cmsg_data[]
 267  *   ------------  ------------   -------------------
 268  *   IPPROTO_SCTP  SCTP_NXTINFO   struct sctp_nxtinfo
 269  */
 270 struct sctp_nxtinfo {
 271         __u16 nxt_sid;
 272         __u16 nxt_flags;
 273         __u32 nxt_ppid;
 274         __u32 nxt_length;
 275         sctp_assoc_t nxt_assoc_id;
 276 };
 277
 278 /* 5.3.7 SCTP PR-SCTP Information Structure (SCTP_PRINFO)
 279  *
 280  *   This cmsghdr structure specifies SCTP options for sendmsg().
 281  *
 282  *   cmsg_level    cmsg_type      cmsg_data[]
 283  *   ------------  ------------   -------------------
 284  *   IPPROTO_SCTP  SCTP_PRINFO    struct sctp_prinfo
 285  */
 286 struct sctp_prinfo {
 287         __u16 pr_policy;
 288         __u32 pr_value;
 289 };
 290
 291 /* 5.3.8 SCTP AUTH Information Structure (SCTP_AUTHINFO)
 292  *
 293  *   This cmsghdr structure specifies SCTP options for sendmsg().
 294  *
 295  *   cmsg_level    cmsg_type      cmsg_data[]
 296  *   ------------  ------------   -------------------
 297  *   IPPROTO_SCTP  SCTP_AUTHINFO  struct sctp_authinfo
 298  */
 299 struct sctp_authinfo {
 300         __u16 auth_keynumber;
 301 };
 302
 303 /*
 304  *  sinfo_flags: 16 bits (unsigned integer)
 305  *
 306  *   This field may contain any of the following flags and is composed of
 307  *   a bitwise OR of these values.
 308  */
 309 enum sctp_sinfo_flags {
 310         SCTP_UNORDERED          = (1 << 0), /* Send/receive message unordered. */
 311         SCTP_ADDR_OVER          = (1 << 1), /* Override the primary destination. */
 312         SCTP_ABORT              = (1 << 2), /* Send an ABORT message to the peer. */
 313         SCTP_SACK_IMMEDIATELY   = (1 << 3), /* SACK should be sent without delay. */
 314         /* 2 bits here have been used by SCTP_PR_SCTP_MASK */
 315         SCTP_SENDALL            = (1 << 6),
 316         SCTP_PR_SCTP_ALL        = (1 << 7),
 317         SCTP_NOTIFICATION       = MSG_NOTIFICATION, /* Next message is not user msg but notification. */
 318         SCTP_EOF                = MSG_FIN,  /* Initiate graceful shutdown process. */
 319 };
 320
 321 typedef union {
 322         __u8                    raw;
 323         struct sctp_initmsg     init;
 324         struct sctp_sndrcvinfo  sndrcv;
 325 } sctp_cmsg_data_t;
 326
 327 /* These are cmsg_types.  */
 328 typedef enum sctp_cmsg_type {
 329         SCTP_INIT,              /* 5.2.1 SCTP Initiation Structure */
 330 #define SCTP_INIT       SCTP_INIT
 331         SCTP_SNDRCV,            /* 5.2.2 SCTP Header Information Structure */
 332 #define SCTP_SNDRCV     SCTP_SNDRCV
 333         SCTP_SNDINFO,           /* 5.3.4 SCTP Send Information Structure */
 334 #define SCTP_SNDINFO    SCTP_SNDINFO
 335         SCTP_RCVINFO,           /* 5.3.5 SCTP Receive Information Structure */
 336 #define SCTP_RCVINFO    SCTP_RCVINFO
 337         SCTP_NXTINFO,           /* 5.3.6 SCTP Next Receive Information Structure */
 338 #define SCTP_NXTINFO    SCTP_NXTINFO
 339         SCTP_PRINFO,            /* 5.3.7 SCTP PR-SCTP Information Structure */
 340 #define SCTP_PRINFO     SCTP_PRINFO
 341         SCTP_AUTHINFO,          /* 5.3.8 SCTP AUTH Information Structure */
 342 #define SCTP_AUTHINFO   SCTP_AUTHINFO
 343         SCTP_DSTADDRV4,         /* 5.3.9 SCTP Destination IPv4 Address Structure */
 344 #define SCTP_DSTADDRV4  SCTP_DSTADDRV4
 345         SCTP_DSTADDRV6,         /* 5.3.10 SCTP Destination IPv6 Address Structure */
 346 #define SCTP_DSTADDRV6  SCTP_DSTADDRV6
 347 } sctp_cmsg_t;
 348
 349 /*
 350  * 5.3.1.1 SCTP_ASSOC_CHANGE
 351  *
 352  *   Communication notifications inform the ULP that an SCTP association
 353  *   has either begun or ended. The identifier for a new association is
 354  *   provided by this notificaion. The notification information has the
 355  *   following format:
 356  *
 357  */
 358 struct sctp_assoc_change {
 359         __u16 sac_type;
 360         __u16 sac_flags;
 361         __u32 sac_length;
 362         __u16 sac_state;
 363         __u16 sac_error;
 364         __u16 sac_outbound_streams;
 365         __u16 sac_inbound_streams;
 366         sctp_assoc_t sac_assoc_id;
 367         __u8 sac_info[0];
 368 };
 369
 370 /*
 371  *   sac_state: 32 bits (signed integer)
 372  *
 373  *   This field holds one of a number of values that communicate the
 374  *   event that happened to the association.  They include:
 375  *
 376  *   Note:  The following state names deviate from the API draft as
 377  *   the names clash too easily with other kernel symbols.
 378  */
 379 enum sctp_sac_state {
 380         SCTP_COMM_UP,
 381         SCTP_COMM_LOST,
 382         SCTP_RESTART,
 383         SCTP_SHUTDOWN_COMP,
 384         SCTP_CANT_STR_ASSOC,
 385 };
 386
 387 /*
 388  * 5.3.1.2 SCTP_PEER_ADDR_CHANGE
 389  *
 390  *   When a destination address on a multi-homed peer encounters a change
 391  *   an interface details event is sent.  The information has the
 392  *   following structure:
 393  */
 394 struct sctp_paddr_change {
 395         __u16 spc_type;
 396         __u16 spc_flags;
 397         __u32 spc_length;
 398         struct sockaddr_storage spc_aaddr;
 399         int spc_state;
 400         int spc_error;
 401         sctp_assoc_t spc_assoc_id;
 402 } __attribute__((packed, aligned(4)));
 403
 404 /*
 405  *    spc_state:  32 bits (signed integer)
 406  *
 407  *   This field holds one of a number of values that communicate the
 408  *   event that happened to the address.  They include:
 409  */
 410 enum sctp_spc_state {
 411         SCTP_ADDR_AVAILABLE,
 412         SCTP_ADDR_UNREACHABLE,
 413         SCTP_ADDR_REMOVED,
 414         SCTP_ADDR_ADDED,
 415         SCTP_ADDR_MADE_PRIM,
 416         SCTP_ADDR_CONFIRMED,
 417         SCTP_ADDR_POTENTIALLY_FAILED,
 418 #define SCTP_ADDR_PF    SCTP_ADDR_POTENTIALLY_FAILED
 419 };
 420
 421
 422 /*
 423  * 5.3.1.3 SCTP_REMOTE_ERROR
 424  *
 425  *   A remote peer may send an Operational Error message to its peer.
 426  *   This message indicates a variety of error conditions on an
 427  *   association. The entire error TLV as it appears on the wire is
 428  *   included in a SCTP_REMOTE_ERROR event.  Please refer to the SCTP
 429  *   specification [SCTP] and any extensions for a list of possible
 430  *   error formats. SCTP error TLVs have the format:
 431  */
 432 struct sctp_remote_error {
 433         __u16 sre_type;
 434         __u16 sre_flags;
 435         __u32 sre_length;
 436         __be16 sre_error;
 437         sctp_assoc_t sre_assoc_id;
 438         __u8 sre_data[0];
 439 };
 440
 441
 442 /*
 443  * 5.3.1.4 SCTP_SEND_FAILED
 444  *
 445  *   If SCTP cannot deliver a message it may return the message as a
 446  *   notification.
 447  */
 448 struct sctp_send_failed {
 449         __u16 ssf_type;
 450         __u16 ssf_flags;
 451         __u32 ssf_length;
 452         __u32 ssf_error;
 453         struct sctp_sndrcvinfo ssf_info;
 454         sctp_assoc_t ssf_assoc_id;
 455         __u8 ssf_data[0];
 456 };
 457
 458 struct sctp_send_failed_event {
 459         __u16 ssf_type;
 460         __u16 ssf_flags;
 461         __u32 ssf_length;
 462         __u32 ssf_error;
 463         struct sctp_sndinfo ssfe_info;
 464         sctp_assoc_t ssf_assoc_id;
 465         __u8 ssf_data[0];
 466 };
 467
 468 /*
 469  *   ssf_flags: 16 bits (unsigned integer)
 470  *
 471  *   The flag value will take one of the following values
 472  *
 473  *   SCTP_DATA_UNSENT  - Indicates that the data was never put on
 474  *                       the wire.
 475  *
 476  *   SCTP_DATA_SENT    - Indicates that the data was put on the wire.
 477  *                       Note that this does not necessarily mean that the
 478  *                       data was (or was not) successfully delivered.
 479  */
 480 enum sctp_ssf_flags {
 481         SCTP_DATA_UNSENT,
 482         SCTP_DATA_SENT,
 483 };
 484
 485 /*
 486  * 5.3.1.5 SCTP_SHUTDOWN_EVENT
 487  *
 488  *   When a peer sends a SHUTDOWN, SCTP delivers this notification to
 489  *   inform the application that it should cease sending data.
 490  */
 491 struct sctp_shutdown_event {
 492         __u16 sse_type;
 493         __u16 sse_flags;
 494         __u32 sse_length;
 495         sctp_assoc_t sse_assoc_id;
 496 };
 497
 498 /*
 499  * 5.3.1.6 SCTP_ADAPTATION_INDICATION
 500  *
 501  *   When a peer sends a Adaptation Layer Indication parameter , SCTP
 502  *   delivers this notification to inform the application
 503  *   that of the peers requested adaptation layer.
 504  */
 505 struct sctp_adaptation_event {
 506         __u16 sai_type;
 507         __u16 sai_flags;
 508         __u32 sai_length;
 509         __u32 sai_adaptation_ind;
 510         sctp_assoc_t sai_assoc_id;
 511 };
 512
 513 /*
 514  * 5.3.1.7 SCTP_PARTIAL_DELIVERY_EVENT
 515  *
 516  *   When a receiver is engaged in a partial delivery of a
 517  *   message this notification will be used to indicate
 518  *   various events.
 519  */
 520 struct sctp_pdapi_event {
 521         __u16 pdapi_type;
 522         __u16 pdapi_flags;
 523         __u32 pdapi_length;
 524         __u32 pdapi_indication;
 525         sctp_assoc_t pdapi_assoc_id;
 526         __u32 pdapi_stream;
 527         __u32 pdapi_seq;
 528 };
 529
 530 enum { SCTP_PARTIAL_DELIVERY_ABORTED=0, };
 531
 532 /*
 533  * 5.3.1.8.  SCTP_AUTHENTICATION_EVENT
 534  *
 535  *  When a receiver is using authentication this message will provide
 536  *  notifications regarding new keys being made active as well as errors.
 537  */
 538 struct sctp_authkey_event {
 539         __u16 auth_type;
 540         __u16 auth_flags;
 541         __u32 auth_length;
 542         __u16 auth_keynumber;
 543         __u16 auth_altkeynumber;
 544         __u32 auth_indication;
 545         sctp_assoc_t auth_assoc_id;
 546 };
 547
 548 enum {
 549         SCTP_AUTH_NEW_KEY,
 550 #define SCTP_AUTH_NEWKEY        SCTP_AUTH_NEW_KEY /* compatible with before */
 551         SCTP_AUTH_FREE_KEY,
 552         SCTP_AUTH_NO_AUTH,
 553 };
 554
 555 /*
 556  * 6.1.9. SCTP_SENDER_DRY_EVENT
 557  *
 558  * When the SCTP stack has no more user data to send or retransmit, this
 559  * notification is given to the user. Also, at the time when a user app
 560  * subscribes to this event, if there is no data to be sent or
 561  * retransmit, the stack will immediately send up this notification.
 562  */
 563 struct sctp_sender_dry_event {
 564         __u16 sender_dry_type;
 565         __u16 sender_dry_flags;
 566         __u32 sender_dry_length;
 567         sctp_assoc_t sender_dry_assoc_id;
 568 };
 569
 570 #define SCTP_STREAM_RESET_INCOMING_SSN  0x0001
 571 #define SCTP_STREAM_RESET_OUTGOING_SSN  0x0002
 572 #define SCTP_STREAM_RESET_DENIED        0x0004
 573 #define SCTP_STREAM_RESET_FAILED        0x0008
 574 struct sctp_stream_reset_event {
 575         __u16 strreset_type;
 576         __u16 strreset_flags;
 577         __u32 strreset_length;
 578         sctp_assoc_t strreset_assoc_id;
 579         __u16 strreset_stream_list[];
 580 };
 581
 582 #define SCTP_ASSOC_RESET_DENIED         0x0004
 583 #define SCTP_ASSOC_RESET_FAILED         0x0008
 584 struct sctp_assoc_reset_event {
 585         __u16 assocreset_type;
 586         __u16 assocreset_flags;
 587         __u32 assocreset_length;
 588         sctp_assoc_t assocreset_assoc_id;
 589         __u32 assocreset_local_tsn;
 590         __u32 assocreset_remote_tsn;
 591 };
 592
 593 #define SCTP_ASSOC_CHANGE_DENIED        0x0004
 594 #define SCTP_ASSOC_CHANGE_FAILED        0x0008
 595 #define SCTP_STREAM_CHANGE_DENIED       SCTP_ASSOC_CHANGE_DENIED
 596 #define SCTP_STREAM_CHANGE_FAILED       SCTP_ASSOC_CHANGE_FAILED
 597 struct sctp_stream_change_event {
 598         __u16 strchange_type;
 599         __u16 strchange_flags;
 600         __u32 strchange_length;
 601         sctp_assoc_t strchange_assoc_id;
 602         __u16 strchange_instrms;
 603         __u16 strchange_outstrms;
 604 };
 605
 606 /*
 607  * Described in Section 7.3
 608  *   Ancillary Data and Notification Interest Options
 609  */
 610 struct sctp_event_subscribe {
 611         __u8 sctp_data_io_event;
 612         __u8 sctp_association_event;
 613         __u8 sctp_address_event;
 614         __u8 sctp_send_failure_event;
 615         __u8 sctp_peer_error_event;
 616         __u8 sctp_shutdown_event;
 617         __u8 sctp_partial_delivery_event;
 618         __u8 sctp_adaptation_layer_event;
 619         __u8 sctp_authentication_event;
 620         __u8 sctp_sender_dry_event;
 621         __u8 sctp_stream_reset_event;
 622         __u8 sctp_assoc_reset_event;
 623         __u8 sctp_stream_change_event;
 624         __u8 sctp_send_failure_event_event;
 625 };
 626
 627 /*
 628  * 5.3.1 SCTP Notification Structure
 629  *
 630  *   The notification structure is defined as the union of all
 631  *   notification types.
 632  *
 633  */
 634 union sctp_notification {
 635         struct {
 636                 __u16 sn_type;             /* Notification type. */
 637                 __u16 sn_flags;
 638                 __u32 sn_length;
 639         } sn_header;
 640         struct sctp_assoc_change sn_assoc_change;
 641         struct sctp_paddr_change sn_paddr_change;
 642         struct sctp_remote_error sn_remote_error;
 643         struct sctp_send_failed sn_send_failed;
 644         struct sctp_shutdown_event sn_shutdown_event;
 645         struct sctp_adaptation_event sn_adaptation_event;
 646         struct sctp_pdapi_event sn_pdapi_event;
 647         struct sctp_authkey_event sn_authkey_event;
 648         struct sctp_sender_dry_event sn_sender_dry_event;
 649         struct sctp_stream_reset_event sn_strreset_event;
 650         struct sctp_assoc_reset_event sn_assocreset_event;
 651         struct sctp_stream_change_event sn_strchange_event;
 652         struct sctp_send_failed_event sn_send_failed_event;
 653 };
 654
 655 /* Section 5.3.1
 656  * All standard values for sn_type flags are greater than 2^15.
 657  * Values from 2^15 and down are reserved.
 658  */
 659
 660 enum sctp_sn_type {
 661         SCTP_SN_TYPE_BASE       = (1<<15),
 662         SCTP_DATA_IO_EVENT      = SCTP_SN_TYPE_BASE,
 663 #define SCTP_DATA_IO_EVENT              SCTP_DATA_IO_EVENT
 664         SCTP_ASSOC_CHANGE,
 665 #define SCTP_ASSOC_CHANGE               SCTP_ASSOC_CHANGE
 666         SCTP_PEER_ADDR_CHANGE,
 667 #define SCTP_PEER_ADDR_CHANGE           SCTP_PEER_ADDR_CHANGE
 668         SCTP_SEND_FAILED,
 669 #define SCTP_SEND_FAILED                SCTP_SEND_FAILED
 670         SCTP_REMOTE_ERROR,
 671 #define SCTP_REMOTE_ERROR               SCTP_REMOTE_ERROR
 672         SCTP_SHUTDOWN_EVENT,
 673 #define SCTP_SHUTDOWN_EVENT             SCTP_SHUTDOWN_EVENT
 674         SCTP_PARTIAL_DELIVERY_EVENT,
 675 #define SCTP_PARTIAL_DELIVERY_EVENT     SCTP_PARTIAL_DELIVERY_EVENT
 676         SCTP_ADAPTATION_INDICATION,
 677 #define SCTP_ADAPTATION_INDICATION      SCTP_ADAPTATION_INDICATION
 678         SCTP_AUTHENTICATION_EVENT,
 679 #define SCTP_AUTHENTICATION_INDICATION  SCTP_AUTHENTICATION_EVENT
 680         SCTP_SENDER_DRY_EVENT,
 681 #define SCTP_SENDER_DRY_EVENT           SCTP_SENDER_DRY_EVENT
 682         SCTP_STREAM_RESET_EVENT,
 683 #define SCTP_STREAM_RESET_EVENT         SCTP_STREAM_RESET_EVENT
 684         SCTP_ASSOC_RESET_EVENT,
 685 #define SCTP_ASSOC_RESET_EVENT          SCTP_ASSOC_RESET_EVENT
 686         SCTP_STREAM_CHANGE_EVENT,
 687 #define SCTP_STREAM_CHANGE_EVENT        SCTP_STREAM_CHANGE_EVENT
 688         SCTP_SEND_FAILED_EVENT,
 689 #define SCTP_SEND_FAILED_EVENT          SCTP_SEND_FAILED_EVENT
 690         SCTP_SN_TYPE_MAX        = SCTP_SEND_FAILED_EVENT,
 691 #define SCTP_SN_TYPE_MAX                SCTP_SN_TYPE_MAX
 692 };
 693
 694 /* Notification error codes used to fill up the error fields in some
 695  * notifications.
 696  * SCTP_PEER_ADDRESS_CHAGE      : spc_error
 697  * SCTP_ASSOC_CHANGE            : sac_error
 698  * These names should be potentially included in the draft 04 of the SCTP
 699  * sockets API specification.
 700  */
 701 typedef enum sctp_sn_error {
 702         SCTP_FAILED_THRESHOLD,
 703         SCTP_RECEIVED_SACK,
 704         SCTP_HEARTBEAT_SUCCESS,
 705         SCTP_RESPONSE_TO_USER_REQ,
 706         SCTP_INTERNAL_ERROR,
 707         SCTP_SHUTDOWN_GUARD_EXPIRES,
 708         SCTP_PEER_FAULTY,
 709 } sctp_sn_error_t;
 710
 711 /*
 712  * 7.1.1 Retransmission Timeout Parameters (SCTP_RTOINFO)
 713  *
 714  *   The protocol parameters used to initialize and bound retransmission
 715  *   timeout (RTO) are tunable.  See [SCTP] for more information on how
 716  *   these parameters are used in RTO calculation.
 717  */
 718 struct sctp_rtoinfo {
 719         sctp_assoc_t    srto_assoc_id;
 720         __u32           srto_initial;
 721         __u32           srto_max;
 722         __u32           srto_min;
 723 };
 724
 725 /*
 726  * 7.1.2 Association Parameters (SCTP_ASSOCINFO)
 727  *
 728  *   This option is used to both examine and set various association and
 729  *   endpoint parameters.
 730  */
 731 struct sctp_assocparams {
 732         sctp_assoc_t    sasoc_assoc_id;
 733         __u16           sasoc_asocmaxrxt;
 734         __u16           sasoc_number_peer_destinations;
 735         __u32           sasoc_peer_rwnd;
 736         __u32           sasoc_local_rwnd;
 737         __u32           sasoc_cookie_life;
 738 };
 739
 740 /*
 741  * 7.1.9 Set Peer Primary Address (SCTP_SET_PEER_PRIMARY_ADDR)
 742  *
 743  *  Requests that the peer mark the enclosed address as the association
 744  *  primary. The enclosed address must be one of the association's
 745  *  locally bound addresses. The following structure is used to make a
 746  *   set primary request:
 747  */
 748 struct sctp_setpeerprim {
 749         sctp_assoc_t            sspp_assoc_id;
 750         struct sockaddr_storage sspp_addr;
 751 } __attribute__((packed, aligned(4)));
 752
 753 /*
 754  * 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR)
 755  *
 756  *  Requests that the local SCTP stack use the enclosed peer address as
 757  *  the association primary. The enclosed address must be one of the
 758  *  association peer's addresses. The following structure is used to
 759  *  make a set peer primary request:
 760  */
 761 struct sctp_prim {
 762         sctp_assoc_t            ssp_assoc_id;
 763         struct sockaddr_storage ssp_addr;
 764 } __attribute__((packed, aligned(4)));
 765
 766 /* For backward compatibility use, define the old name too */
 767 #define sctp_setprim    sctp_prim
 768
 769 /*
 770  * 7.1.11 Set Adaptation Layer Indicator (SCTP_ADAPTATION_LAYER)
 771  *
 772  * Requests that the local endpoint set the specified Adaptation Layer
 773  * Indication parameter for all future INIT and INIT-ACK exchanges.
 774  */
 775 struct sctp_setadaptation {
 776         __u32   ssb_adaptation_ind;
 777 };
 778
 779 /*
 780  * 7.1.13 Peer Address Parameters  (SCTP_PEER_ADDR_PARAMS)
 781  *
 782  *   Applications can enable or disable heartbeats for any peer address
 783  *   of an association, modify an address's heartbeat interval, force a
 784  *   heartbeat to be sent immediately, and adjust the address's maximum
 785  *   number of retransmissions sent before an address is considered
 786  *   unreachable. The following structure is used to access and modify an
 787  *   address's parameters:
 788  */
 789 enum  sctp_spp_flags {
 790         SPP_HB_ENABLE = 1<<0,           /*Enable heartbeats*/
 791         SPP_HB_DISABLE = 1<<1,          /*Disable heartbeats*/
 792         SPP_HB = SPP_HB_ENABLE | SPP_HB_DISABLE,
 793         SPP_HB_DEMAND = 1<<2,           /*Send heartbeat immediately*/
 794         SPP_PMTUD_ENABLE = 1<<3,        /*Enable PMTU discovery*/
 795         SPP_PMTUD_DISABLE = 1<<4,       /*Disable PMTU discovery*/
 796         SPP_PMTUD = SPP_PMTUD_ENABLE | SPP_PMTUD_DISABLE,
 797         SPP_SACKDELAY_ENABLE = 1<<5,    /*Enable SACK*/
 798         SPP_SACKDELAY_DISABLE = 1<<6,   /*Disable SACK*/
 799         SPP_SACKDELAY = SPP_SACKDELAY_ENABLE | SPP_SACKDELAY_DISABLE,
 800         SPP_HB_TIME_IS_ZERO = 1<<7,     /* Set HB delay to 0 */
 801         SPP_IPV6_FLOWLABEL = 1<<8,
 802         SPP_DSCP = 1<<9,
 803 };
 804
 805 struct sctp_paddrparams {
 806         sctp_assoc_t            spp_assoc_id;
 807         struct sockaddr_storage spp_address;
 808         __u32                   spp_hbinterval;
 809         __u16                   spp_pathmaxrxt;
 810         __u32                   spp_pathmtu;
 811         __u32                   spp_sackdelay;
 812         __u32                   spp_flags;
 813         __u32                   spp_ipv6_flowlabel;
 814         __u8                    spp_dscp;
 815 } __attribute__((packed, aligned(4)));
 816
 817 /*
 818  * 7.1.18.  Add a chunk that must be authenticated (SCTP_AUTH_CHUNK)
 819  *
 820  * This set option adds a chunk type that the user is requesting to be
 821  * received only in an authenticated way.  Changes to the list of chunks
 822  * will only effect future associations on the socket.
 823  */
 824 struct sctp_authchunk {
 825         __u8            sauth_chunk;
 826 };
 827
 828 /*
 829  * 7.1.19.  Get or set the list of supported HMAC Identifiers (SCTP_HMAC_IDENT)
 830  *
 831  * This option gets or sets the list of HMAC algorithms that the local
 832  * endpoint requires the peer to use.
 833  */
 834 /* This here is only used by user space as is. It might not be a good idea
 835  * to export/reveal the whole structure with reserved fields etc.
 836  */
 837 enum {
 838         SCTP_AUTH_HMAC_ID_SHA1 = 1,
 839         SCTP_AUTH_HMAC_ID_SHA256 = 3,
 840 };
 841
 842 struct sctp_hmacalgo {
 843         __u32           shmac_num_idents;
 844         __u16           shmac_idents[];
 845 };
 846
 847 /* Sadly, user and kernel space have different names for
 848  * this structure member, so this is to not break anything.
 849  */
 850 #define shmac_number_of_idents  shmac_num_idents
 851
 852 /*
 853  * 7.1.20.  Set a shared key (SCTP_AUTH_KEY)
 854  *
 855  * This option will set a shared secret key which is used to build an
 856  * association shared key.
 857  */
 858 struct sctp_authkey {
 859         sctp_assoc_t    sca_assoc_id;
 860         __u16           sca_keynumber;
 861         __u16           sca_keylength;
 862         __u8            sca_key[];
 863 };
 864
 865 /*
 866  * 7.1.21.  Get or set the active shared key (SCTP_AUTH_ACTIVE_KEY)
 867  *
 868  * This option will get or set the active shared key to be used to build
 869  * the association shared key.
 870  */
 871
 872 struct sctp_authkeyid {
 873         sctp_assoc_t    scact_assoc_id;
 874         __u16           scact_keynumber;
 875 };
 876
 877
 878 /*
 879  * 7.1.23.  Get or set delayed ack timer (SCTP_DELAYED_SACK)
 880  *
 881  * This option will effect the way delayed acks are performed.  This
 882  * option allows you to get or set the delayed ack time, in
 883  * milliseconds.  It also allows changing the delayed ack frequency.
 884  * Changing the frequency to 1 disables the delayed sack algorithm.  If
 885  * the assoc_id is 0, then this sets or gets the endpoints default
 886  * values.  If the assoc_id field is non-zero, then the set or get
 887  * effects the specified association for the one to many model (the
 888  * assoc_id field is ignored by the one to one model).  Note that if
 889  * sack_delay or sack_freq are 0 when setting this option, then the
 890  * current values will remain unchanged.
 891  */
 892 struct sctp_sack_info {
 893         sctp_assoc_t    sack_assoc_id;
 894         uint32_t        sack_delay;
 895         uint32_t        sack_freq;
 896 };
 897
 898 struct sctp_assoc_value {
 899     sctp_assoc_t            assoc_id;
 900     uint32_t                assoc_value;
 901 };
 902
 903 struct sctp_stream_value {
 904         sctp_assoc_t assoc_id;
 905         uint16_t stream_id;
 906         uint16_t stream_value;
 907 };
 908
 909 /*
 910  * 7.2.2 Peer Address Information
 911  *
 912  *   Applications can retrieve information about a specific peer address
 913  *   of an association, including its reachability state, congestion
 914  *   window, and retransmission timer values.  This information is
 915  *   read-only. The following structure is used to access this
 916  *   information:
 917  */
 918 struct sctp_paddrinfo {
 919         sctp_assoc_t            spinfo_assoc_id;
 920         struct sockaddr_storage spinfo_address;
 921         __s32                   spinfo_state;
 922         __u32                   spinfo_cwnd;
 923         __u32                   spinfo_srtt;
 924         __u32                   spinfo_rto;
 925         __u32                   spinfo_mtu;
 926 } __attribute__((packed, aligned(4)));
 927
 928 /* Peer addresses's state. */
 929 /* UNKNOWN: Peer address passed by the upper layer in sendmsg or connect[x]
 930  * calls.
 931  * UNCONFIRMED: Peer address received in INIT/INIT-ACK address parameters.
 932  *              Not yet confirmed by a heartbeat and not available for data
 933  *              transfers.
 934  * ACTIVE : Peer address confirmed, active and available for data transfers.
 935  * INACTIVE: Peer address inactive and not available for data transfers.
 936  */
 937 enum sctp_spinfo_state {
 938         SCTP_INACTIVE,
 939         SCTP_PF,
 940 #define SCTP_POTENTIALLY_FAILED         SCTP_PF
 941         SCTP_ACTIVE,
 942         SCTP_UNCONFIRMED,
 943         SCTP_UNKNOWN = 0xffff  /* Value used for transport state unknown */
 944 };
 945
 946 /*
 947  * 7.2.1 Association Status (SCTP_STATUS)
 948  *
 949  *   Applications can retrieve current status information about an
 950  *   association, including association state, peer receiver window size,
 951  *   number of unacked data chunks, and number of data chunks pending
 952  *   receipt.  This information is read-only.  The following structure is
 953  *   used to access this information:
 954  */
 955 struct sctp_status {
 956         sctp_assoc_t            sstat_assoc_id;
 957         __s32                   sstat_state;
 958         __u32                   sstat_rwnd;
 959         __u16                   sstat_unackdata;
 960         __u16                   sstat_penddata;
 961         __u16                   sstat_instrms;
 962         __u16                   sstat_outstrms;
 963         __u32                   sstat_fragmentation_point;
 964         struct sctp_paddrinfo   sstat_primary;
 965 };
 966
 967 /*
 968  * 7.2.3.  Get the list of chunks the peer requires to be authenticated
 969  *         (SCTP_PEER_AUTH_CHUNKS)
 970  *
 971  * This option gets a list of chunks for a specified association that
 972  * the peer requires to be received authenticated only.
 973  */
 974 struct sctp_authchunks {
 975         sctp_assoc_t    gauth_assoc_id;
 976         __u32           gauth_number_of_chunks;
 977         uint8_t         gauth_chunks[];
 978 };
 979
 980 /* The broken spelling has been released already in lksctp-tools header,
 981  * so don't break anyone, now that it's fixed.
 982  */
 983 #define guth_number_of_chunks   gauth_number_of_chunks
 984
 985 /* Association states.  */
 986 enum sctp_sstat_state {
 987         SCTP_EMPTY                = 0,
 988         SCTP_CLOSED               = 1,
 989         SCTP_COOKIE_WAIT          = 2,
 990         SCTP_COOKIE_ECHOED        = 3,
 991         SCTP_ESTABLISHED          = 4,
 992         SCTP_SHUTDOWN_PENDING     = 5,
 993         SCTP_SHUTDOWN_SENT        = 6,
 994         SCTP_SHUTDOWN_RECEIVED    = 7,
 995         SCTP_SHUTDOWN_ACK_SENT    = 8,
 996 };
 997
 998 /*
 999  * 8.2.6. Get the Current Identifiers of Associations
1000  *        (SCTP_GET_ASSOC_ID_LIST)
1001  *
1002  * This option gets the current list of SCTP association identifiers of
1003  * the SCTP associations handled by a one-to-many style socket.
1004  */
1005 struct sctp_assoc_ids {
1006         __u32           gaids_number_of_ids;
1007         sctp_assoc_t    gaids_assoc_id[];
1008 };
1009
1010 /*
1011  * 8.3, 8.5 get all peer/local addresses in an association.
1012  * This parameter struct is used by SCTP_GET_PEER_ADDRS and
1013  * SCTP_GET_LOCAL_ADDRS socket options used internally to implement
1014  * sctp_getpaddrs() and sctp_getladdrs() API.
1015  */
1016 struct sctp_getaddrs_old {
1017         sctp_assoc_t            assoc_id;
1018         int                     addr_num;
1019         struct sockaddr         *addrs;
1020 };
1021
1022 struct sctp_getaddrs {
1023         sctp_assoc_t            assoc_id; /*input*/
1024         __u32                   addr_num; /*output*/
1025         __u8                    addrs[0]; /*output, variable size*/
1026 };
1027
1028 /* A socket user request obtained via SCTP_GET_ASSOC_STATS that retrieves
1029  * association stats. All stats are counts except sas_maxrto and
1030  * sas_obs_rto_ipaddr. maxrto is the max observed rto + transport since
1031  * the last call. Will return 0 when RTO was not update since last call
1032  */
1033 struct sctp_assoc_stats {
1034         sctp_assoc_t    sas_assoc_id;    /* Input */
1035                                          /* Transport of observed max RTO */
1036         struct sockaddr_storage sas_obs_rto_ipaddr;
1037         __u64           sas_maxrto;      /* Maximum Observed RTO for period */
1038         __u64           sas_isacks;      /* SACKs received */
1039         __u64           sas_osacks;      /* SACKs sent */
1040         __u64           sas_opackets;    /* Packets sent */
1041         __u64           sas_ipackets;    /* Packets received */
1042         __u64           sas_rtxchunks;   /* Retransmitted Chunks */
1043         __u64           sas_outofseqtsns;/* TSN received > next expected */
1044         __u64           sas_idupchunks;  /* Dups received (ordered+unordered) */
1045         __u64           sas_gapcnt;      /* Gap Acknowledgements Received */
1046         __u64           sas_ouodchunks;  /* Unordered data chunks sent */
1047         __u64           sas_iuodchunks;  /* Unordered data chunks received */
1048         __u64           sas_oodchunks;   /* Ordered data chunks sent */
1049         __u64           sas_iodchunks;   /* Ordered data chunks received */
1050         __u64           sas_octrlchunks; /* Control chunks sent */
1051         __u64           sas_ictrlchunks; /* Control chunks received */
1052 };
1053
1054 /*
1055  * 8.1 sctp_bindx()
1056  *
1057  * The flags parameter is formed from the bitwise OR of zero or more of the
1058  * following currently defined flags:
1059  */
1060 #define SCTP_BINDX_ADD_ADDR 0x01
1061 #define SCTP_BINDX_REM_ADDR 0x02
1062
1063 /* This is the structure that is passed as an argument(optval) to
1064  * getsockopt(SCTP_SOCKOPT_PEELOFF).
1065  */
1066 typedef struct {
1067         sctp_assoc_t associd;
1068         int sd;
1069 } sctp_peeloff_arg_t;
1070
1071 typedef struct {
1072         sctp_peeloff_arg_t p_arg;
1073         unsigned flags;
1074 } sctp_peeloff_flags_arg_t;
1075
1076 /*
1077  *  Peer Address Thresholds socket option
1078  */
1079 struct sctp_paddrthlds {
1080         sctp_assoc_t spt_assoc_id;
1081         struct sockaddr_storage spt_address;
1082         __u16 spt_pathmaxrxt;
1083         __u16 spt_pathpfthld;
1084 };
1085
1086 /* Use a new structure with spt_pathcpthld for back compatibility */
1087 struct sctp_paddrthlds_v2 {
1088         sctp_assoc_t spt_assoc_id;
1089         struct sockaddr_storage spt_address;
1090         __u16 spt_pathmaxrxt;
1091         __u16 spt_pathpfthld;
1092         __u16 spt_pathcpthld;
1093 };
1094
1095 /*
1096  * Socket Option for Getting the Association/Stream-Specific PR-SCTP Status
1097  */
1098 struct sctp_prstatus {
1099         sctp_assoc_t sprstat_assoc_id;
1100         __u16 sprstat_sid;
1101         __u16 sprstat_policy;
1102         __u64 sprstat_abandoned_unsent;
1103         __u64 sprstat_abandoned_sent;
1104 };
1105
1106 struct sctp_default_prinfo {
1107         sctp_assoc_t pr_assoc_id;
1108         __u32 pr_value;
1109         __u16 pr_policy;
1110 };
1111
1112 struct sctp_info {
1113         __u32   sctpi_tag;
1114         __u32   sctpi_state;
1115         __u32   sctpi_rwnd;
1116         __u16   sctpi_unackdata;
1117         __u16   sctpi_penddata;
1118         __u16   sctpi_instrms;
1119         __u16   sctpi_outstrms;
1120         __u32   sctpi_fragmentation_point;
1121         __u32   sctpi_inqueue;
1122         __u32   sctpi_outqueue;
1123         __u32   sctpi_overall_error;
1124         __u32   sctpi_max_burst;
1125         __u32   sctpi_maxseg;
1126         __u32   sctpi_peer_rwnd;
1127         __u32   sctpi_peer_tag;
1128         __u8    sctpi_peer_capable;
1129         __u8    sctpi_peer_sack;
1130         __u16   __reserved1;
1131
1132         /* assoc status info */
1133         __u64   sctpi_isacks;
1134         __u64   sctpi_osacks;
1135         __u64   sctpi_opackets;
1136         __u64   sctpi_ipackets;
1137         __u64   sctpi_rtxchunks;
1138         __u64   sctpi_outofseqtsns;
1139         __u64   sctpi_idupchunks;
1140         __u64   sctpi_gapcnt;
1141         __u64   sctpi_ouodchunks;
1142         __u64   sctpi_iuodchunks;
1143         __u64   sctpi_oodchunks;
1144         __u64   sctpi_iodchunks;
1145         __u64   sctpi_octrlchunks;
1146         __u64   sctpi_ictrlchunks;
1147
1148         /* primary transport info */
1149         struct sockaddr_storage sctpi_p_address;
1150         __s32   sctpi_p_state;
1151         __u32   sctpi_p_cwnd;
1152         __u32   sctpi_p_srtt;
1153         __u32   sctpi_p_rto;
1154         __u32   sctpi_p_hbinterval;
1155         __u32   sctpi_p_pathmaxrxt;
1156         __u32   sctpi_p_sackdelay;
1157         __u32   sctpi_p_sackfreq;
1158         __u32   sctpi_p_ssthresh;
1159         __u32   sctpi_p_partial_bytes_acked;
1160         __u32   sctpi_p_flight_size;
1161         __u16   sctpi_p_error;
1162         __u16   __reserved2;
1163
1164         /* sctp sock info */
1165         __u32   sctpi_s_autoclose;
1166         __u32   sctpi_s_adaptation_ind;
1167         __u32   sctpi_s_pd_point;
1168         __u8    sctpi_s_nodelay;
1169         __u8    sctpi_s_disable_fragments;
1170         __u8    sctpi_s_v4mapped;
1171         __u8    sctpi_s_frag_interleave;
1172         __u32   sctpi_s_type;
1173         __u32   __reserved3;
1174 };
1175
1176 struct sctp_reset_streams {
1177         sctp_assoc_t srs_assoc_id;
1178         uint16_t srs_flags;
1179         uint16_t srs_number_streams;    /* 0 == ALL */
1180         uint16_t srs_stream_list[];     /* list if srs_num_streams is not 0 */
1181 };
1182
1183 struct sctp_add_streams {
1184         sctp_assoc_t sas_assoc_id;
1185         uint16_t sas_instrms;
1186         uint16_t sas_outstrms;
1187 };
1188
1189 struct sctp_event {
1190         sctp_assoc_t se_assoc_id;
1191         uint16_t se_type;
1192         uint8_t se_on;
1193 };
1194
1195 struct sctp_udpencaps {
1196         sctp_assoc_t sue_assoc_id;
1197         struct sockaddr_storage sue_address;
1198         uint16_t sue_port;
1199 };
1200
1201 /* SCTP Stream schedulers */
1202 enum sctp_sched_type {
1203         SCTP_SS_FCFS,
1204         SCTP_SS_DEFAULT = SCTP_SS_FCFS,
1205         SCTP_SS_PRIO,
1206         SCTP_SS_RR,
1207         SCTP_SS_MAX = SCTP_SS_RR
1208 };
1209
1210 #endif /* _SCTP_H */