include/uapi/linux/sctp.h

   1 /* SCTP kernel implementation
   2  * (C) Copyright IBM Corp. 2001, 2004
   3  * Copyright (c) 1999-2000 Cisco, Inc.
   4  * Copyright (c) 1999-2001 Motorola, Inc.
   5  * Copyright (c) 2002 Intel Corp.
   6  *
   7  * This file is part of the SCTP kernel implementation
   8  *
   9  * This header represents the structures and constants needed to support
  10  * the SCTP Extension to the Sockets API.
  11  *
  12  * This SCTP implementation is free software;
  13  * you can redistribute it and/or modify it under the terms of
  14  * the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2, or (at your option)
  16  * any later version.
  17  *
  18  * This SCTP implementation is distributed in the hope that it
  19  * will be useful, but WITHOUT ANY WARRANTY; without even the implied
  20  *                 ************************
  21  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  22  * See the GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with GNU CC; see the file COPYING.  If not, see
  26  * <http://www.gnu.org/licenses/>.
  27  *
  28  * Please send any bug reports or fixes you make to the
  29  * email address(es):
  30  *    lksctp developers <linux-sctp@vger.kernel.org>
  31  *
  32  * Or submit a bug report through the following website:
  33  *    http://www.sf.net/projects/lksctp
  34  *
  35  * Written or modified by:
  36  *    La Monte H.P. Yarroll    <piggy@acm.org>
  37  *    R. Stewart               <randall@sctp.chicago.il.us>
  38  *    K. Morneau               <kmorneau@cisco.com>
  39  *    Q. Xie                   <qxie1@email.mot.com>
  40  *    Karl Knutson             <karl@athena.chicago.il.us>
  41  *    Jon Grimm                <jgrimm@us.ibm.com>
  42  *    Daisy Chang              <daisyc@us.ibm.com>
  43  *    Ryan Layer               <rmlayer@us.ibm.com>
  44  *    Ardelle Fan              <ardelle.fan@intel.com>
  45  *    Sridhar Samudrala        <sri@us.ibm.com>
  46  *    Inaky Perez-Gonzalez     <inaky.gonzalez@intel.com>
  47  *    Vlad Yasevich            <vladislav.yasevich@hp.com>
  48  *
  49  * Any bugs reported given to us we will try to fix... any fixes shared will
  50  * be incorporated into the next SCTP release.
  51  */
  52
  53 #ifndef _UAPI_SCTP_H
  54 #define _UAPI_SCTP_H
  55
  56 #include <linux/types.h>
  57 #include <linux/socket.h>
  58
  59 typedef __s32 sctp_assoc_t;
  60
  61 /* The following symbols come from the Sockets API Extensions for
  62  * SCTP <draft-ietf-tsvwg-sctpsocket-07.txt>.
  63  */
  64 #define SCTP_RTOINFO    0
  65 #define SCTP_ASSOCINFO  1
  66 #define SCTP_INITMSG    2
  67 #define SCTP_NODELAY    3               /* Get/set nodelay option. */
  68 #define SCTP_AUTOCLOSE  4
  69 #define SCTP_SET_PEER_PRIMARY_ADDR 5
  70 #define SCTP_PRIMARY_ADDR       6
  71 #define SCTP_ADAPTATION_LAYER   7
  72 #define SCTP_DISABLE_FRAGMENTS  8
  73 #define SCTP_PEER_ADDR_PARAMS   9
  74 #define SCTP_DEFAULT_SEND_PARAM 10
  75 #define SCTP_EVENTS     11
  76 #define SCTP_I_WANT_MAPPED_V4_ADDR 12   /* Turn on/off mapped v4 addresses  */
  77 #define SCTP_MAXSEG     13              /* Get/set maximum fragment. */
  78 #define SCTP_STATUS     14
  79 #define SCTP_GET_PEER_ADDR_INFO 15
  80 #define SCTP_DELAYED_ACK_TIME   16
  81 #define SCTP_DELAYED_ACK SCTP_DELAYED_ACK_TIME
  82 #define SCTP_DELAYED_SACK SCTP_DELAYED_ACK_TIME
  83 #define SCTP_CONTEXT    17
  84 #define SCTP_FRAGMENT_INTERLEAVE        18
  85 #define SCTP_PARTIAL_DELIVERY_POINT     19 /* Set/Get partial delivery point */
  86 #define SCTP_MAX_BURST  20              /* Set/Get max burst */
  87 #define SCTP_AUTH_CHUNK 21      /* Set only: add a chunk type to authenticate */
  88 #define SCTP_HMAC_IDENT 22
  89 #define SCTP_AUTH_KEY   23
  90 #define SCTP_AUTH_ACTIVE_KEY    24
  91 #define SCTP_AUTH_DELETE_KEY    25
  92 #define SCTP_PEER_AUTH_CHUNKS   26      /* Read only */
  93 #define SCTP_LOCAL_AUTH_CHUNKS  27      /* Read only */
  94 #define SCTP_GET_ASSOC_NUMBER   28      /* Read only */
  95 #define SCTP_GET_ASSOC_ID_LIST  29      /* Read only */
  96 #define SCTP_AUTO_ASCONF       30
  97 #define SCTP_PEER_ADDR_THLDS    31
  98
  99 /* Internal Socket Options. Some of the sctp library functions are
 100  * implemented using these socket options.
 101  */
 102 #define SCTP_SOCKOPT_BINDX_ADD  100     /* BINDX requests for adding addrs */
 103 #define SCTP_SOCKOPT_BINDX_REM  101     /* BINDX requests for removing addrs. */
 104 #define SCTP_SOCKOPT_PEELOFF    102     /* peel off association. */
 105 /* Options 104-106 are deprecated and removed. Do not use this space */
 106 #define SCTP_SOCKOPT_CONNECTX_OLD       107     /* CONNECTX old requests. */
 107 #define SCTP_GET_PEER_ADDRS     108             /* Get all peer address. */
 108 #define SCTP_GET_LOCAL_ADDRS    109             /* Get all local address. */
 109 #define SCTP_SOCKOPT_CONNECTX   110             /* CONNECTX requests. */
 110 #define SCTP_SOCKOPT_CONNECTX3  111     /* CONNECTX requests (updated) */
 111 #define SCTP_GET_ASSOC_STATS    112     /* Read only */
 112
 113 /*
 114  * 5.2.1 SCTP Initiation Structure (SCTP_INIT)
 115  *
 116  *   This cmsghdr structure provides information for initializing new
 117  *   SCTP associations with sendmsg().  The SCTP_INITMSG socket option
 118  *   uses this same data structure.  This structure is not used for
 119  *   recvmsg().
 120  *
 121  *   cmsg_level    cmsg_type      cmsg_data[]
 122  *   ------------  ------------   ----------------------
 123  *   IPPROTO_SCTP  SCTP_INIT      struct sctp_initmsg
 124  *
 125  */
 126 struct sctp_initmsg {
 127         __u16 sinit_num_ostreams;
 128         __u16 sinit_max_instreams;
 129         __u16 sinit_max_attempts;
 130         __u16 sinit_max_init_timeo;
 131 };
 132
 133 /*
 134  * 5.2.2 SCTP Header Information Structure (SCTP_SNDRCV)
 135  *
 136  *   This cmsghdr structure specifies SCTP options for sendmsg() and
 137  *   describes SCTP header information about a received message through
 138  *   recvmsg().
 139  *
 140  *   cmsg_level    cmsg_type      cmsg_data[]
 141  *   ------------  ------------   ----------------------
 142  *   IPPROTO_SCTP  SCTP_SNDRCV    struct sctp_sndrcvinfo
 143  *
 144  */
 145 struct sctp_sndrcvinfo {
 146         __u16 sinfo_stream;
 147         __u16 sinfo_ssn;
 148         __u16 sinfo_flags;
 149         __u32 sinfo_ppid;
 150         __u32 sinfo_context;
 151         __u32 sinfo_timetolive;
 152         __u32 sinfo_tsn;
 153         __u32 sinfo_cumtsn;
 154         sctp_assoc_t sinfo_assoc_id;
 155 };
 156
 157 /*
 158  *  sinfo_flags: 16 bits (unsigned integer)
 159  *
 160  *   This field may contain any of the following flags and is composed of
 161  *   a bitwise OR of these values.
 162  */
 163
 164 enum sctp_sinfo_flags {
 165         SCTP_UNORDERED = 1,  /* Send/receive message unordered. */
 166         SCTP_ADDR_OVER = 2,  /* Override the primary destination. */
 167         SCTP_ABORT=4,        /* Send an ABORT message to the peer. */
 168         SCTP_SACK_IMMEDIATELY = 8,      /* SACK should be sent without delay */
 169         SCTP_EOF=MSG_FIN,    /* Initiate graceful shutdown process. */
 170 };
 171
 172 typedef union {
 173         __u8                    raw;
 174         struct sctp_initmsg     init;
 175         struct sctp_sndrcvinfo  sndrcv;
 176 } sctp_cmsg_data_t;
 177
 178 /* These are cmsg_types.  */
 179 typedef enum sctp_cmsg_type {
 180         SCTP_INIT,              /* 5.2.1 SCTP Initiation Structure */
 181 #define SCTP_INIT       SCTP_INIT
 182         SCTP_SNDRCV,            /* 5.2.2 SCTP Header Information Structure */
 183 #define SCTP_SNDRCV     SCTP_SNDRCV
 184 } sctp_cmsg_t;
 185
 186 /*
 187  * 5.3.1.1 SCTP_ASSOC_CHANGE
 188  *
 189  *   Communication notifications inform the ULP that an SCTP association
 190  *   has either begun or ended. The identifier for a new association is
 191  *   provided by this notificaion. The notification information has the
 192  *   following format:
 193  *
 194  */
 195 struct sctp_assoc_change {
 196         __u16 sac_type;
 197         __u16 sac_flags;
 198         __u32 sac_length;
 199         __u16 sac_state;
 200         __u16 sac_error;
 201         __u16 sac_outbound_streams;
 202         __u16 sac_inbound_streams;
 203         sctp_assoc_t sac_assoc_id;
 204         __u8 sac_info[0];
 205 };
 206
 207 /*
 208  *   sac_state: 32 bits (signed integer)
 209  *
 210  *   This field holds one of a number of values that communicate the
 211  *   event that happened to the association.  They include:
 212  *
 213  *   Note:  The following state names deviate from the API draft as
 214  *   the names clash too easily with other kernel symbols.
 215  */
 216 enum sctp_sac_state {
 217         SCTP_COMM_UP,
 218         SCTP_COMM_LOST,
 219         SCTP_RESTART,
 220         SCTP_SHUTDOWN_COMP,
 221         SCTP_CANT_STR_ASSOC,
 222 };
 223
 224 /*
 225  * 5.3.1.2 SCTP_PEER_ADDR_CHANGE
 226  *
 227  *   When a destination address on a multi-homed peer encounters a change
 228  *   an interface details event is sent.  The information has the
 229  *   following structure:
 230  */
 231 struct sctp_paddr_change {
 232         __u16 spc_type;
 233         __u16 spc_flags;
 234         __u32 spc_length;
 235         struct sockaddr_storage spc_aaddr;
 236         int spc_state;
 237         int spc_error;
 238         sctp_assoc_t spc_assoc_id;
 239 } __attribute__((packed, aligned(4)));
 240
 241 /*
 242  *    spc_state:  32 bits (signed integer)
 243  *
 244  *   This field holds one of a number of values that communicate the
 245  *   event that happened to the address.  They include:
 246  */
 247 enum sctp_spc_state {
 248         SCTP_ADDR_AVAILABLE,
 249         SCTP_ADDR_UNREACHABLE,
 250         SCTP_ADDR_REMOVED,
 251         SCTP_ADDR_ADDED,
 252         SCTP_ADDR_MADE_PRIM,
 253         SCTP_ADDR_CONFIRMED,
 254 };
 255
 256
 257 /*
 258  * 5.3.1.3 SCTP_REMOTE_ERROR
 259  *
 260  *   A remote peer may send an Operational Error message to its peer.
 261  *   This message indicates a variety of error conditions on an
 262  *   association. The entire error TLV as it appears on the wire is
 263  *   included in a SCTP_REMOTE_ERROR event.  Please refer to the SCTP
 264  *   specification [SCTP] and any extensions for a list of possible
 265  *   error formats. SCTP error TLVs have the format:
 266  */
 267 struct sctp_remote_error {
 268         __u16 sre_type;
 269         __u16 sre_flags;
 270         __u32 sre_length;
 271         __u16 sre_error;
 272         sctp_assoc_t sre_assoc_id;
 273         __u8 sre_data[0];
 274 };
 275
 276
 277 /*
 278  * 5.3.1.4 SCTP_SEND_FAILED
 279  *
 280  *   If SCTP cannot deliver a message it may return the message as a
 281  *   notification.
 282  */
 283 struct sctp_send_failed {
 284         __u16 ssf_type;
 285         __u16 ssf_flags;
 286         __u32 ssf_length;
 287         __u32 ssf_error;
 288         struct sctp_sndrcvinfo ssf_info;
 289         sctp_assoc_t ssf_assoc_id;
 290         __u8 ssf_data[0];
 291 };
 292
 293 /*
 294  *   ssf_flags: 16 bits (unsigned integer)
 295  *
 296  *   The flag value will take one of the following values
 297  *
 298  *   SCTP_DATA_UNSENT  - Indicates that the data was never put on
 299  *                       the wire.
 300  *
 301  *   SCTP_DATA_SENT    - Indicates that the data was put on the wire.
 302  *                       Note that this does not necessarily mean that the
 303  *                       data was (or was not) successfully delivered.
 304  */
 305 enum sctp_ssf_flags {
 306         SCTP_DATA_UNSENT,
 307         SCTP_DATA_SENT,
 308 };
 309
 310 /*
 311  * 5.3.1.5 SCTP_SHUTDOWN_EVENT
 312  *
 313  *   When a peer sends a SHUTDOWN, SCTP delivers this notification to
 314  *   inform the application that it should cease sending data.
 315  */
 316 struct sctp_shutdown_event {
 317         __u16 sse_type;
 318         __u16 sse_flags;
 319         __u32 sse_length;
 320         sctp_assoc_t sse_assoc_id;
 321 };
 322
 323 /*
 324  * 5.3.1.6 SCTP_ADAPTATION_INDICATION
 325  *
 326  *   When a peer sends a Adaptation Layer Indication parameter , SCTP
 327  *   delivers this notification to inform the application
 328  *   that of the peers requested adaptation layer.
 329  */
 330 struct sctp_adaptation_event {
 331         __u16 sai_type;
 332         __u16 sai_flags;
 333         __u32 sai_length;
 334         __u32 sai_adaptation_ind;
 335         sctp_assoc_t sai_assoc_id;
 336 };
 337
 338 /*
 339  * 5.3.1.7 SCTP_PARTIAL_DELIVERY_EVENT
 340  *
 341  *   When a receiver is engaged in a partial delivery of a
 342  *   message this notification will be used to indicate
 343  *   various events.
 344  */
 345 struct sctp_pdapi_event {
 346         __u16 pdapi_type;
 347         __u16 pdapi_flags;
 348         __u32 pdapi_length;
 349         __u32 pdapi_indication;
 350         sctp_assoc_t pdapi_assoc_id;
 351 };
 352
 353 enum { SCTP_PARTIAL_DELIVERY_ABORTED=0, };
 354
 355 /*
 356  * 5.3.1.8.  SCTP_AUTHENTICATION_EVENT
 357  *
 358  *  When a receiver is using authentication this message will provide
 359  *  notifications regarding new keys being made active as well as errors.
 360  */
 361 struct sctp_authkey_event {
 362         __u16 auth_type;
 363         __u16 auth_flags;
 364         __u32 auth_length;
 365         __u16 auth_keynumber;
 366         __u16 auth_altkeynumber;
 367         __u32 auth_indication;
 368         sctp_assoc_t auth_assoc_id;
 369 };
 370
 371 enum { SCTP_AUTH_NEWKEY = 0, };
 372
 373 /*
 374  * 6.1.9. SCTP_SENDER_DRY_EVENT
 375  *
 376  * When the SCTP stack has no more user data to send or retransmit, this
 377  * notification is given to the user. Also, at the time when a user app
 378  * subscribes to this event, if there is no data to be sent or
 379  * retransmit, the stack will immediately send up this notification.
 380  */
 381 struct sctp_sender_dry_event {
 382         __u16 sender_dry_type;
 383         __u16 sender_dry_flags;
 384         __u32 sender_dry_length;
 385         sctp_assoc_t sender_dry_assoc_id;
 386 };
 387
 388 /*
 389  * Described in Section 7.3
 390  *   Ancillary Data and Notification Interest Options
 391  */
 392 struct sctp_event_subscribe {
 393         __u8 sctp_data_io_event;
 394         __u8 sctp_association_event;
 395         __u8 sctp_address_event;
 396         __u8 sctp_send_failure_event;
 397         __u8 sctp_peer_error_event;
 398         __u8 sctp_shutdown_event;
 399         __u8 sctp_partial_delivery_event;
 400         __u8 sctp_adaptation_layer_event;
 401         __u8 sctp_authentication_event;
 402         __u8 sctp_sender_dry_event;
 403 };
 404
 405 /*
 406  * 5.3.1 SCTP Notification Structure
 407  *
 408  *   The notification structure is defined as the union of all
 409  *   notification types.
 410  *
 411  */
 412 union sctp_notification {
 413         struct {
 414                 __u16 sn_type;             /* Notification type. */
 415                 __u16 sn_flags;
 416                 __u32 sn_length;
 417         } sn_header;
 418         struct sctp_assoc_change sn_assoc_change;
 419         struct sctp_paddr_change sn_paddr_change;
 420         struct sctp_remote_error sn_remote_error;
 421         struct sctp_send_failed sn_send_failed;
 422         struct sctp_shutdown_event sn_shutdown_event;
 423         struct sctp_adaptation_event sn_adaptation_event;
 424         struct sctp_pdapi_event sn_pdapi_event;
 425         struct sctp_authkey_event sn_authkey_event;
 426         struct sctp_sender_dry_event sn_sender_dry_event;
 427 };
 428
 429 /* Section 5.3.1
 430  * All standard values for sn_type flags are greater than 2^15.
 431  * Values from 2^15 and down are reserved.
 432  */
 433
 434 enum sctp_sn_type {
 435         SCTP_SN_TYPE_BASE     = (1<<15),
 436         SCTP_ASSOC_CHANGE,
 437 #define SCTP_ASSOC_CHANGE               SCTP_ASSOC_CHANGE
 438         SCTP_PEER_ADDR_CHANGE,
 439 #define SCTP_PEER_ADDR_CHANGE           SCTP_PEER_ADDR_CHANGE
 440         SCTP_SEND_FAILED,
 441 #define SCTP_SEND_FAILED                SCTP_SEND_FAILED
 442         SCTP_REMOTE_ERROR,
 443 #define SCTP_REMOTE_ERROR               SCTP_REMOTE_ERROR
 444         SCTP_SHUTDOWN_EVENT,
 445 #define SCTP_SHUTDOWN_EVENT             SCTP_SHUTDOWN_EVENT
 446         SCTP_PARTIAL_DELIVERY_EVENT,
 447 #define SCTP_PARTIAL_DELIVERY_EVENT     SCTP_PARTIAL_DELIVERY_EVENT
 448         SCTP_ADAPTATION_INDICATION,
 449 #define SCTP_ADAPTATION_INDICATION      SCTP_ADAPTATION_INDICATION
 450         SCTP_AUTHENTICATION_EVENT,
 451 #define SCTP_AUTHENTICATION_INDICATION  SCTP_AUTHENTICATION_EVENT
 452         SCTP_SENDER_DRY_EVENT,
 453 #define SCTP_SENDER_DRY_EVENT           SCTP_SENDER_DRY_EVENT
 454 };
 455
 456 /* Notification error codes used to fill up the error fields in some
 457  * notifications.
 458  * SCTP_PEER_ADDRESS_CHAGE      : spc_error
 459  * SCTP_ASSOC_CHANGE            : sac_error
 460  * These names should be potentially included in the draft 04 of the SCTP
 461  * sockets API specification.
 462  */
 463 typedef enum sctp_sn_error {
 464         SCTP_FAILED_THRESHOLD,
 465         SCTP_RECEIVED_SACK,
 466         SCTP_HEARTBEAT_SUCCESS,
 467         SCTP_RESPONSE_TO_USER_REQ,
 468         SCTP_INTERNAL_ERROR,
 469         SCTP_SHUTDOWN_GUARD_EXPIRES,
 470         SCTP_PEER_FAULTY,
 471 } sctp_sn_error_t;
 472
 473 /*
 474  * 7.1.1 Retransmission Timeout Parameters (SCTP_RTOINFO)
 475  *
 476  *   The protocol parameters used to initialize and bound retransmission
 477  *   timeout (RTO) are tunable.  See [SCTP] for more information on how
 478  *   these parameters are used in RTO calculation.
 479  */
 480 struct sctp_rtoinfo {
 481         sctp_assoc_t    srto_assoc_id;
 482         __u32           srto_initial;
 483         __u32           srto_max;
 484         __u32           srto_min;
 485 };
 486
 487 /*
 488  * 7.1.2 Association Parameters (SCTP_ASSOCINFO)
 489  *
 490  *   This option is used to both examine and set various association and
 491  *   endpoint parameters.
 492  */
 493 struct sctp_assocparams {
 494         sctp_assoc_t    sasoc_assoc_id;
 495         __u16           sasoc_asocmaxrxt;
 496         __u16           sasoc_number_peer_destinations;
 497         __u32           sasoc_peer_rwnd;
 498         __u32           sasoc_local_rwnd;
 499         __u32           sasoc_cookie_life;
 500 };
 501
 502 /*
 503  * 7.1.9 Set Peer Primary Address (SCTP_SET_PEER_PRIMARY_ADDR)
 504  *
 505  *  Requests that the peer mark the enclosed address as the association
 506  *  primary. The enclosed address must be one of the association's
 507  *  locally bound addresses. The following structure is used to make a
 508  *   set primary request:
 509  */
 510 struct sctp_setpeerprim {
 511         sctp_assoc_t            sspp_assoc_id;
 512         struct sockaddr_storage sspp_addr;
 513 } __attribute__((packed, aligned(4)));
 514
 515 /*
 516  * 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR)
 517  *
 518  *  Requests that the local SCTP stack use the enclosed peer address as
 519  *  the association primary. The enclosed address must be one of the
 520  *  association peer's addresses. The following structure is used to
 521  *  make a set peer primary request:
 522  */
 523 struct sctp_prim {
 524         sctp_assoc_t            ssp_assoc_id;
 525         struct sockaddr_storage ssp_addr;
 526 } __attribute__((packed, aligned(4)));
 527
 528 /* For backward compatibility use, define the old name too */
 529 #define sctp_setprim    sctp_prim
 530
 531 /*
 532  * 7.1.11 Set Adaptation Layer Indicator (SCTP_ADAPTATION_LAYER)
 533  *
 534  * Requests that the local endpoint set the specified Adaptation Layer
 535  * Indication parameter for all future INIT and INIT-ACK exchanges.
 536  */
 537 struct sctp_setadaptation {
 538         __u32   ssb_adaptation_ind;
 539 };
 540
 541 /*
 542  * 7.1.13 Peer Address Parameters  (SCTP_PEER_ADDR_PARAMS)
 543  *
 544  *   Applications can enable or disable heartbeats for any peer address
 545  *   of an association, modify an address's heartbeat interval, force a
 546  *   heartbeat to be sent immediately, and adjust the address's maximum
 547  *   number of retransmissions sent before an address is considered
 548  *   unreachable. The following structure is used to access and modify an
 549  *   address's parameters:
 550  */
 551 enum  sctp_spp_flags {
 552         SPP_HB_ENABLE = 1<<0,           /*Enable heartbeats*/
 553         SPP_HB_DISABLE = 1<<1,          /*Disable heartbeats*/
 554         SPP_HB = SPP_HB_ENABLE | SPP_HB_DISABLE,
 555         SPP_HB_DEMAND = 1<<2,           /*Send heartbeat immediately*/
 556         SPP_PMTUD_ENABLE = 1<<3,        /*Enable PMTU discovery*/
 557         SPP_PMTUD_DISABLE = 1<<4,       /*Disable PMTU discovery*/
 558         SPP_PMTUD = SPP_PMTUD_ENABLE | SPP_PMTUD_DISABLE,
 559         SPP_SACKDELAY_ENABLE = 1<<5,    /*Enable SACK*/
 560         SPP_SACKDELAY_DISABLE = 1<<6,   /*Disable SACK*/
 561         SPP_SACKDELAY = SPP_SACKDELAY_ENABLE | SPP_SACKDELAY_DISABLE,
 562         SPP_HB_TIME_IS_ZERO = 1<<7,     /* Set HB delay to 0 */
 563 };
 564
 565 struct sctp_paddrparams {
 566         sctp_assoc_t            spp_assoc_id;
 567         struct sockaddr_storage spp_address;
 568         __u32                   spp_hbinterval;
 569         __u16                   spp_pathmaxrxt;
 570         __u32                   spp_pathmtu;
 571         __u32                   spp_sackdelay;
 572         __u32                   spp_flags;
 573 } __attribute__((packed, aligned(4)));
 574
 575 /*
 576  * 7.1.18.  Add a chunk that must be authenticated (SCTP_AUTH_CHUNK)
 577  *
 578  * This set option adds a chunk type that the user is requesting to be
 579  * received only in an authenticated way.  Changes to the list of chunks
 580  * will only effect future associations on the socket.
 581  */
 582 struct sctp_authchunk {
 583         __u8            sauth_chunk;
 584 };
 585
 586 /*
 587  * 7.1.19.  Get or set the list of supported HMAC Identifiers (SCTP_HMAC_IDENT)
 588  *
 589  * This option gets or sets the list of HMAC algorithms that the local
 590  * endpoint requires the peer to use.
 591  */
 592 #ifndef __KERNEL__
 593 /* This here is only used by user space as is. It might not be a good idea
 594  * to export/reveal the whole structure with reserved fields etc.
 595  */
 596 enum {
 597         SCTP_AUTH_HMAC_ID_SHA1 = 1,
 598         SCTP_AUTH_HMAC_ID_SHA256 = 3,
 599 };
 600 #endif
 601
 602 struct sctp_hmacalgo {
 603         __u32           shmac_num_idents;
 604         __u16           shmac_idents[];
 605 };
 606
 607 /* Sadly, user and kernel space have different names for
 608  * this structure member, so this is to not break anything.
 609  */
 610 #define shmac_number_of_idents  shmac_num_idents
 611
 612 /*
 613  * 7.1.20.  Set a shared key (SCTP_AUTH_KEY)
 614  *
 615  * This option will set a shared secret key which is used to build an
 616  * association shared key.
 617  */
 618 struct sctp_authkey {
 619         sctp_assoc_t    sca_assoc_id;
 620         __u16           sca_keynumber;
 621         __u16           sca_keylength;
 622         __u8            sca_key[];
 623 };
 624
 625 /*
 626  * 7.1.21.  Get or set the active shared key (SCTP_AUTH_ACTIVE_KEY)
 627  *
 628  * This option will get or set the active shared key to be used to build
 629  * the association shared key.
 630  */
 631
 632 struct sctp_authkeyid {
 633         sctp_assoc_t    scact_assoc_id;
 634         __u16           scact_keynumber;
 635 };
 636
 637
 638 /*
 639  * 7.1.23.  Get or set delayed ack timer (SCTP_DELAYED_SACK)
 640  *
 641  * This option will effect the way delayed acks are performed.  This
 642  * option allows you to get or set the delayed ack time, in
 643  * milliseconds.  It also allows changing the delayed ack frequency.
 644  * Changing the frequency to 1 disables the delayed sack algorithm.  If
 645  * the assoc_id is 0, then this sets or gets the endpoints default
 646  * values.  If the assoc_id field is non-zero, then the set or get
 647  * effects the specified association for the one to many model (the
 648  * assoc_id field is ignored by the one to one model).  Note that if
 649  * sack_delay or sack_freq are 0 when setting this option, then the
 650  * current values will remain unchanged.
 651  */
 652 struct sctp_sack_info {
 653         sctp_assoc_t    sack_assoc_id;
 654         uint32_t        sack_delay;
 655         uint32_t        sack_freq;
 656 };
 657
 658 struct sctp_assoc_value {
 659     sctp_assoc_t            assoc_id;
 660     uint32_t                assoc_value;
 661 };
 662
 663 /*
 664  * 7.2.2 Peer Address Information
 665  *
 666  *   Applications can retrieve information about a specific peer address
 667  *   of an association, including its reachability state, congestion
 668  *   window, and retransmission timer values.  This information is
 669  *   read-only. The following structure is used to access this
 670  *   information:
 671  */
 672 struct sctp_paddrinfo {
 673         sctp_assoc_t            spinfo_assoc_id;
 674         struct sockaddr_storage spinfo_address;
 675         __s32                   spinfo_state;
 676         __u32                   spinfo_cwnd;
 677         __u32                   spinfo_srtt;
 678         __u32                   spinfo_rto;
 679         __u32                   spinfo_mtu;
 680 } __attribute__((packed, aligned(4)));
 681
 682 /* Peer addresses's state. */
 683 /* UNKNOWN: Peer address passed by the upper layer in sendmsg or connect[x]
 684  * calls.
 685  * UNCONFIRMED: Peer address received in INIT/INIT-ACK address parameters.
 686  *              Not yet confirmed by a heartbeat and not available for data
 687  *              transfers.
 688  * ACTIVE : Peer address confirmed, active and available for data transfers.
 689  * INACTIVE: Peer address inactive and not available for data transfers.
 690  */
 691 enum sctp_spinfo_state {
 692         SCTP_INACTIVE,
 693         SCTP_PF,
 694         SCTP_ACTIVE,
 695         SCTP_UNCONFIRMED,
 696         SCTP_UNKNOWN = 0xffff  /* Value used for transport state unknown */
 697 };
 698
 699 /*
 700  * 7.2.1 Association Status (SCTP_STATUS)
 701  *
 702  *   Applications can retrieve current status information about an
 703  *   association, including association state, peer receiver window size,
 704  *   number of unacked data chunks, and number of data chunks pending
 705  *   receipt.  This information is read-only.  The following structure is
 706  *   used to access this information:
 707  */
 708 struct sctp_status {
 709         sctp_assoc_t            sstat_assoc_id;
 710         __s32                   sstat_state;
 711         __u32                   sstat_rwnd;
 712         __u16                   sstat_unackdata;
 713         __u16                   sstat_penddata;
 714         __u16                   sstat_instrms;
 715         __u16                   sstat_outstrms;
 716         __u32                   sstat_fragmentation_point;
 717         struct sctp_paddrinfo   sstat_primary;
 718 };
 719
 720 /*
 721  * 7.2.3.  Get the list of chunks the peer requires to be authenticated
 722  *         (SCTP_PEER_AUTH_CHUNKS)
 723  *
 724  * This option gets a list of chunks for a specified association that
 725  * the peer requires to be received authenticated only.
 726  */
 727 struct sctp_authchunks {
 728         sctp_assoc_t    gauth_assoc_id;
 729         __u32           gauth_number_of_chunks;
 730         uint8_t         gauth_chunks[];
 731 };
 732
 733 /* The broken spelling has been released already in lksctp-tools header,
 734  * so don't break anyone, now that it's fixed.
 735  */
 736 #define guth_number_of_chunks   gauth_number_of_chunks
 737
 738 /* Association states.  */
 739 enum sctp_sstat_state {
 740         SCTP_EMPTY                = 0,
 741         SCTP_CLOSED               = 1,
 742         SCTP_COOKIE_WAIT          = 2,
 743         SCTP_COOKIE_ECHOED        = 3,
 744         SCTP_ESTABLISHED          = 4,
 745         SCTP_SHUTDOWN_PENDING     = 5,
 746         SCTP_SHUTDOWN_SENT        = 6,
 747         SCTP_SHUTDOWN_RECEIVED    = 7,
 748         SCTP_SHUTDOWN_ACK_SENT    = 8,
 749 };
 750
 751 /*
 752  * 8.2.6. Get the Current Identifiers of Associations
 753  *        (SCTP_GET_ASSOC_ID_LIST)
 754  *
 755  * This option gets the current list of SCTP association identifiers of
 756  * the SCTP associations handled by a one-to-many style socket.
 757  */
 758 struct sctp_assoc_ids {
 759         __u32           gaids_number_of_ids;
 760         sctp_assoc_t    gaids_assoc_id[];
 761 };
 762
 763 /*
 764  * 8.3, 8.5 get all peer/local addresses in an association.
 765  * This parameter struct is used by SCTP_GET_PEER_ADDRS and
 766  * SCTP_GET_LOCAL_ADDRS socket options used internally to implement
 767  * sctp_getpaddrs() and sctp_getladdrs() API.
 768  */
 769 struct sctp_getaddrs_old {
 770         sctp_assoc_t            assoc_id;
 771         int                     addr_num;
 772 #ifdef __KERNEL__
 773         struct sockaddr         __user *addrs;
 774 #else
 775         struct sockaddr         *addrs;
 776 #endif
 777 };
 778
 779 struct sctp_getaddrs {
 780         sctp_assoc_t            assoc_id; /*input*/
 781         __u32                   addr_num; /*output*/
 782         __u8                    addrs[0]; /*output, variable size*/
 783 };
 784
 785 /* A socket user request obtained via SCTP_GET_ASSOC_STATS that retrieves
 786  * association stats. All stats are counts except sas_maxrto and
 787  * sas_obs_rto_ipaddr. maxrto is the max observed rto + transport since
 788  * the last call. Will return 0 when RTO was not update since last call
 789  */
 790 struct sctp_assoc_stats {
 791         sctp_assoc_t    sas_assoc_id;    /* Input */
 792                                          /* Transport of observed max RTO */
 793         struct sockaddr_storage sas_obs_rto_ipaddr;
 794         __u64           sas_maxrto;      /* Maximum Observed RTO for period */
 795         __u64           sas_isacks;      /* SACKs received */
 796         __u64           sas_osacks;      /* SACKs sent */
 797         __u64           sas_opackets;    /* Packets sent */
 798         __u64           sas_ipackets;    /* Packets received */
 799         __u64           sas_rtxchunks;   /* Retransmitted Chunks */
 800         __u64           sas_outofseqtsns;/* TSN received > next expected */
 801         __u64           sas_idupchunks;  /* Dups received (ordered+unordered) */
 802         __u64           sas_gapcnt;      /* Gap Acknowledgements Received */
 803         __u64           sas_ouodchunks;  /* Unordered data chunks sent */
 804         __u64           sas_iuodchunks;  /* Unordered data chunks received */
 805         __u64           sas_oodchunks;   /* Ordered data chunks sent */
 806         __u64           sas_iodchunks;   /* Ordered data chunks received */
 807         __u64           sas_octrlchunks; /* Control chunks sent */
 808         __u64           sas_ictrlchunks; /* Control chunks received */
 809 };
 810
 811 /* These are bit fields for msghdr->msg_flags.  See section 5.1.  */
 812 /* On user space Linux, these live in <bits/socket.h> as an enum.  */
 813 enum sctp_msg_flags {
 814         MSG_NOTIFICATION = 0x8000,
 815 #define MSG_NOTIFICATION MSG_NOTIFICATION
 816 };
 817
 818 /*
 819  * 8.1 sctp_bindx()
 820  *
 821  * The flags parameter is formed from the bitwise OR of zero or more of the
 822  * following currently defined flags:
 823  */
 824 #define SCTP_BINDX_ADD_ADDR 0x01
 825 #define SCTP_BINDX_REM_ADDR 0x02
 826
 827 /* This is the structure that is passed as an argument(optval) to
 828  * getsockopt(SCTP_SOCKOPT_PEELOFF).
 829  */
 830 typedef struct {
 831         sctp_assoc_t associd;
 832         int sd;
 833 } sctp_peeloff_arg_t;
 834
 835 /*
 836  *  Peer Address Thresholds socket option
 837  */
 838 struct sctp_paddrthlds {
 839         sctp_assoc_t spt_assoc_id;
 840         struct sockaddr_storage spt_address;
 841         __u16 spt_pathmaxrxt;
 842         __u16 spt_pathpfthld;
 843 };
 844
 845 #endif /* _UAPI_SCTP_H */