include/net/sctp/user.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, write to
  26  * the Free Software Foundation, 59 Temple Place - Suite 330,
  27  * Boston, MA 02111-1307, USA.
  28  *
  29  * Please send any bug reports or fixes you make to the
  30  * email address(es):
  31  *    lksctp developers <lksctp-developers@lists.sourceforge.net>
  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  *
  48  * Any bugs reported given to us we will try to fix... any fixes shared will
  49  * be incorporated into the next SCTP release.
  50  */
  51
  52 #ifndef __net_sctp_user_h__
  53 #define __net_sctp_user_h__
  54
  55 #include <linux/types.h>
  56 #include <linux/socket.h>
  57
  58 typedef __s32 sctp_assoc_t;
  59
  60 /* The following symbols come from the Sockets API Extensions for
  61  * SCTP <draft-ietf-tsvwg-sctpsocket-07.txt>.
  62  */
  63 enum sctp_optname {
  64         SCTP_RTOINFO,
  65 #define SCTP_RTOINFO SCTP_RTOINFO
  66         SCTP_ASSOCINFO,
  67 #define SCTP_ASSOCINFO SCTP_ASSOCINFO
  68         SCTP_INITMSG,
  69 #define SCTP_INITMSG SCTP_INITMSG
  70         SCTP_NODELAY,   /* Get/set nodelay option. */
  71 #define SCTP_NODELAY    SCTP_NODELAY
  72         SCTP_AUTOCLOSE,
  73 #define SCTP_AUTOCLOSE SCTP_AUTOCLOSE
  74         SCTP_SET_PEER_PRIMARY_ADDR,
  75 #define SCTP_SET_PEER_PRIMARY_ADDR SCTP_SET_PEER_PRIMARY_ADDR
  76         SCTP_PRIMARY_ADDR,
  77 #define SCTP_PRIMARY_ADDR SCTP_PRIMARY_ADDR
  78         SCTP_ADAPTATION_LAYER,
  79 #define SCTP_ADAPTATION_LAYER SCTP_ADAPTATION_LAYER
  80         SCTP_DISABLE_FRAGMENTS,
  81 #define SCTP_DISABLE_FRAGMENTS SCTP_DISABLE_FRAGMENTS
  82         SCTP_PEER_ADDR_PARAMS,
  83 #define SCTP_PEER_ADDR_PARAMS SCTP_PEER_ADDR_PARAMS
  84         SCTP_DEFAULT_SEND_PARAM,
  85 #define SCTP_DEFAULT_SEND_PARAM SCTP_DEFAULT_SEND_PARAM
  86         SCTP_EVENTS,
  87 #define SCTP_EVENTS SCTP_EVENTS
  88         SCTP_I_WANT_MAPPED_V4_ADDR,  /* Turn on/off mapped v4 addresses  */
  89 #define SCTP_I_WANT_MAPPED_V4_ADDR SCTP_I_WANT_MAPPED_V4_ADDR
  90         SCTP_MAXSEG,    /* Get/set maximum fragment. */
  91 #define SCTP_MAXSEG     SCTP_MAXSEG
  92         SCTP_STATUS,
  93 #define SCTP_STATUS SCTP_STATUS
  94         SCTP_GET_PEER_ADDR_INFO,
  95 #define SCTP_GET_PEER_ADDR_INFO SCTP_GET_PEER_ADDR_INFO
  96         SCTP_DELAYED_ACK,
  97 #define SCTP_DELAYED_ACK_TIME SCTP_DELAYED_ACK
  98 #define SCTP_DELAYED_ACK SCTP_DELAYED_ACK
  99         SCTP_CONTEXT,   /* Receive Context */
 100 #define SCTP_CONTEXT SCTP_CONTEXT
 101         SCTP_FRAGMENT_INTERLEAVE,
 102 #define SCTP_FRAGMENT_INTERLEAVE SCTP_FRAGMENT_INTERLEAVE
 103         SCTP_PARTIAL_DELIVERY_POINT,    /* Set/Get partial delivery point */
 104 #define SCTP_PARTIAL_DELIVERY_POINT SCTP_PARTIAL_DELIVERY_POINT
 105         SCTP_MAX_BURST,         /* Set/Get max burst */
 106 #define SCTP_MAX_BURST SCTP_MAX_BURST
 107         SCTP_AUTH_CHUNK,        /* Set only: add a chunk type to authenticat */
 108 #define SCTP_AUTH_CHUNK SCTP_AUTH_CHUNK
 109         SCTP_HMAC_IDENT,
 110 #define SCTP_HMAC_IDENT SCTP_HMAC_IDENT
 111         SCTP_AUTH_KEY,
 112 #define SCTP_AUTH_KEY SCTP_AUTH_KEY
 113         SCTP_AUTH_ACTIVE_KEY,
 114 #define SCTP_AUTH_ACTIVE_KEY SCTP_AUTH_ACTIVE_KEY
 115         SCTP_AUTH_DELETE_KEY,
 116 #define SCTP_AUTH_DELETE_KEY SCTP_AUTH_DELETE_KEY
 117         SCTP_PEER_AUTH_CHUNKS,          /* Read only */
 118 #define SCTP_PEER_AUTH_CHUNKS SCTP_PEER_AUTH_CHUNKS
 119         SCTP_LOCAL_AUTH_CHUNKS,         /* Read only */
 120 #define SCTP_LOCAL_AUTH_CHUNKS SCTP_LOCAL_AUTH_CHUNKS
 121         SCTP_GET_ASSOC_NUMBER,          /* Read only */
 122 #define SCTP_GET_ASSOC_NUMBER SCTP_GET_ASSOC_NUMBER
 123
 124
 125         /* Internal Socket Options. Some of the sctp library functions are
 126          * implemented using these socket options.
 127          */
 128         SCTP_SOCKOPT_BINDX_ADD = 100,/* BINDX requests for adding addresses. */
 129 #define SCTP_SOCKOPT_BINDX_ADD  SCTP_SOCKOPT_BINDX_ADD
 130         SCTP_SOCKOPT_BINDX_REM, /* BINDX requests for removing addresses. */
 131 #define SCTP_SOCKOPT_BINDX_REM  SCTP_SOCKOPT_BINDX_REM
 132         SCTP_SOCKOPT_PEELOFF,   /* peel off association. */
 133 #define SCTP_SOCKOPT_PEELOFF    SCTP_SOCKOPT_PEELOFF
 134         SCTP_GET_PEER_ADDRS_NUM_OLD,    /* Get number of peer addresss. */
 135 #define SCTP_GET_PEER_ADDRS_NUM_OLD     SCTP_GET_PEER_ADDRS_NUM_OLD
 136         SCTP_GET_PEER_ADDRS_OLD,        /* Get all peer addresss. */
 137 #define SCTP_GET_PEER_ADDRS_OLD SCTP_GET_PEER_ADDRS_OLD
 138         SCTP_GET_LOCAL_ADDRS_NUM_OLD,   /* Get number of local addresss. */
 139 #define SCTP_GET_LOCAL_ADDRS_NUM_OLD    SCTP_GET_LOCAL_ADDRS_NUM_OLD
 140         SCTP_GET_LOCAL_ADDRS_OLD,       /* Get all local addresss. */
 141 #define SCTP_GET_LOCAL_ADDRS_OLD        SCTP_GET_LOCAL_ADDRS_OLD
 142         SCTP_SOCKOPT_CONNECTX_OLD, /* CONNECTX old requests. */
 143 #define SCTP_SOCKOPT_CONNECTX_OLD       SCTP_SOCKOPT_CONNECTX_OLD
 144         SCTP_GET_PEER_ADDRS,    /* Get all peer addresss. */
 145 #define SCTP_GET_PEER_ADDRS     SCTP_GET_PEER_ADDRS
 146         SCTP_GET_LOCAL_ADDRS,   /* Get all local addresss. */
 147 #define SCTP_GET_LOCAL_ADDRS    SCTP_GET_LOCAL_ADDRS
 148         SCTP_SOCKOPT_CONNECTX, /* CONNECTX requests. */
 149 #define SCTP_SOCKOPT_CONNECTX   SCTP_SOCKOPT_CONNECTX
 150         SCTP_SOCKOPT_CONNECTX3, /* CONNECTX requests. (new implementation) */
 151 #define SCTP_SOCKOPT_CONNECTX3  SCTP_SOCKOPT_CONNECTX3
 152 };
 153
 154 /*
 155  * 5.2.1 SCTP Initiation Structure (SCTP_INIT)
 156  *
 157  *   This cmsghdr structure provides information for initializing new
 158  *   SCTP associations with sendmsg().  The SCTP_INITMSG socket option
 159  *   uses this same data structure.  This structure is not used for
 160  *   recvmsg().
 161  *
 162  *   cmsg_level    cmsg_type      cmsg_data[]
 163  *   ------------  ------------   ----------------------
 164  *   IPPROTO_SCTP  SCTP_INIT      struct sctp_initmsg
 165  *
 166  */
 167 struct sctp_initmsg {
 168         __u16 sinit_num_ostreams;
 169         __u16 sinit_max_instreams;
 170         __u16 sinit_max_attempts;
 171         __u16 sinit_max_init_timeo;
 172 };
 173
 174 /*
 175  * 5.2.2 SCTP Header Information Structure (SCTP_SNDRCV)
 176  *
 177  *   This cmsghdr structure specifies SCTP options for sendmsg() and
 178  *   describes SCTP header information about a received message through
 179  *   recvmsg().
 180  *
 181  *   cmsg_level    cmsg_type      cmsg_data[]
 182  *   ------------  ------------   ----------------------
 183  *   IPPROTO_SCTP  SCTP_SNDRCV    struct sctp_sndrcvinfo
 184  *
 185  */
 186 struct sctp_sndrcvinfo {
 187         __u16 sinfo_stream;
 188         __u16 sinfo_ssn;
 189         __u16 sinfo_flags;
 190         __u32 sinfo_ppid;
 191         __u32 sinfo_context;
 192         __u32 sinfo_timetolive;
 193         __u32 sinfo_tsn;
 194         __u32 sinfo_cumtsn;
 195         sctp_assoc_t sinfo_assoc_id;
 196 };
 197
 198 /*
 199  *  sinfo_flags: 16 bits (unsigned integer)
 200  *
 201  *   This field may contain any of the following flags and is composed of
 202  *   a bitwise OR of these values.
 203  */
 204
 205 enum sctp_sinfo_flags {
 206         SCTP_UNORDERED = 1,  /* Send/receive message unordered. */
 207         SCTP_ADDR_OVER = 2,  /* Override the primary destination. */
 208         SCTP_ABORT=4,        /* Send an ABORT message to the peer. */
 209         SCTP_EOF=MSG_FIN,    /* Initiate graceful shutdown process. */
 210 };
 211
 212
 213 /* These are cmsg_types.  */
 214 typedef enum sctp_cmsg_type {
 215         SCTP_INIT,              /* 5.2.1 SCTP Initiation Structure */
 216         SCTP_SNDRCV,            /* 5.2.2 SCTP Header Information Structure */
 217 } sctp_cmsg_t;
 218
 219
 220 /*
 221  * 5.3.1.1 SCTP_ASSOC_CHANGE
 222  *
 223  *   Communication notifications inform the ULP that an SCTP association
 224  *   has either begun or ended. The identifier for a new association is
 225  *   provided by this notificaion. The notification information has the
 226  *   following format:
 227  *
 228  */
 229 struct sctp_assoc_change {
 230         __u16 sac_type;
 231         __u16 sac_flags;
 232         __u32 sac_length;
 233         __u16 sac_state;
 234         __u16 sac_error;
 235         __u16 sac_outbound_streams;
 236         __u16 sac_inbound_streams;
 237         sctp_assoc_t sac_assoc_id;
 238         __u8 sac_info[0];
 239 };
 240
 241 /*
 242  *   sac_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 association.  They include:
 246  *
 247  *   Note:  The following state names deviate from the API draft as
 248  *   the names clash too easily with other kernel symbols.
 249  */
 250 enum sctp_sac_state {
 251         SCTP_COMM_UP,
 252         SCTP_COMM_LOST,
 253         SCTP_RESTART,
 254         SCTP_SHUTDOWN_COMP,
 255         SCTP_CANT_STR_ASSOC,
 256 };
 257
 258 /*
 259  * 5.3.1.2 SCTP_PEER_ADDR_CHANGE
 260  *
 261  *   When a destination address on a multi-homed peer encounters a change
 262  *   an interface details event is sent.  The information has the
 263  *   following structure:
 264  */
 265 struct sctp_paddr_change {
 266         __u16 spc_type;
 267         __u16 spc_flags;
 268         __u32 spc_length;
 269         struct sockaddr_storage spc_aaddr;
 270         int spc_state;
 271         int spc_error;
 272         sctp_assoc_t spc_assoc_id;
 273 } __attribute__((packed, aligned(4)));
 274
 275 /*
 276  *    spc_state:  32 bits (signed integer)
 277  *
 278  *   This field holds one of a number of values that communicate the
 279  *   event that happened to the address.  They include:
 280  */
 281 enum sctp_spc_state {
 282         SCTP_ADDR_AVAILABLE,
 283         SCTP_ADDR_UNREACHABLE,
 284         SCTP_ADDR_REMOVED,
 285         SCTP_ADDR_ADDED,
 286         SCTP_ADDR_MADE_PRIM,
 287         SCTP_ADDR_CONFIRMED,
 288 };
 289
 290
 291 /*
 292  * 5.3.1.3 SCTP_REMOTE_ERROR
 293  *
 294  *   A remote peer may send an Operational Error message to its peer.
 295  *   This message indicates a variety of error conditions on an
 296  *   association. The entire error TLV as it appears on the wire is
 297  *   included in a SCTP_REMOTE_ERROR event.  Please refer to the SCTP
 298  *   specification [SCTP] and any extensions for a list of possible
 299  *   error formats. SCTP error TLVs have the format:
 300  */
 301 struct sctp_remote_error {
 302         __u16 sre_type;
 303         __u16 sre_flags;
 304         __u32 sre_length;
 305         __u16 sre_error;
 306         sctp_assoc_t sre_assoc_id;
 307         __u8 sre_data[0];
 308 };
 309
 310
 311 /*
 312  * 5.3.1.4 SCTP_SEND_FAILED
 313  *
 314  *   If SCTP cannot deliver a message it may return the message as a
 315  *   notification.
 316  */
 317 struct sctp_send_failed {
 318         __u16 ssf_type;
 319         __u16 ssf_flags;
 320         __u32 ssf_length;
 321         __u32 ssf_error;
 322         struct sctp_sndrcvinfo ssf_info;
 323         sctp_assoc_t ssf_assoc_id;
 324         __u8 ssf_data[0];
 325 };
 326
 327 /*
 328  *   ssf_flags: 16 bits (unsigned integer)
 329  *
 330  *   The flag value will take one of the following values
 331  *
 332  *   SCTP_DATA_UNSENT  - Indicates that the data was never put on
 333  *                       the wire.
 334  *
 335  *   SCTP_DATA_SENT    - Indicates that the data was put on the wire.
 336  *                       Note that this does not necessarily mean that the
 337  *                       data was (or was not) successfully delivered.
 338  */
 339 enum sctp_ssf_flags {
 340         SCTP_DATA_UNSENT,
 341         SCTP_DATA_SENT,
 342 };
 343
 344 /*
 345  * 5.3.1.5 SCTP_SHUTDOWN_EVENT
 346  *
 347  *   When a peer sends a SHUTDOWN, SCTP delivers this notification to
 348  *   inform the application that it should cease sending data.
 349  */
 350 struct sctp_shutdown_event {
 351         __u16 sse_type;
 352         __u16 sse_flags;
 353         __u32 sse_length;
 354         sctp_assoc_t sse_assoc_id;
 355 };
 356
 357 /*
 358  * 5.3.1.6 SCTP_ADAPTATION_INDICATION
 359  *
 360  *   When a peer sends a Adaptation Layer Indication parameter , SCTP
 361  *   delivers this notification to inform the application
 362  *   that of the peers requested adaptation layer.
 363  */
 364 struct sctp_adaptation_event {
 365         __u16 sai_type;
 366         __u16 sai_flags;
 367         __u32 sai_length;
 368         __u32 sai_adaptation_ind;
 369         sctp_assoc_t sai_assoc_id;
 370 };
 371
 372 /*
 373  * 5.3.1.7 SCTP_PARTIAL_DELIVERY_EVENT
 374  *
 375  *   When a receiver is engaged in a partial delivery of a
 376  *   message this notification will be used to indicate
 377  *   various events.
 378  */
 379 struct sctp_pdapi_event {
 380         __u16 pdapi_type;
 381         __u16 pdapi_flags;
 382         __u32 pdapi_length;
 383         __u32 pdapi_indication;
 384         sctp_assoc_t pdapi_assoc_id;
 385 };
 386
 387 enum { SCTP_PARTIAL_DELIVERY_ABORTED=0, };
 388
 389 struct sctp_authkey_event {
 390         __u16 auth_type;
 391         __u16 auth_flags;
 392         __u32 auth_length;
 393         __u16 auth_keynumber;
 394         __u16 auth_altkeynumber;
 395         __u32 auth_indication;
 396         sctp_assoc_t auth_assoc_id;
 397 };
 398
 399 enum { SCTP_AUTH_NEWKEY = 0, };
 400
 401
 402 /*
 403  * Described in Section 7.3
 404  *   Ancillary Data and Notification Interest Options
 405  */
 406 struct sctp_event_subscribe {
 407         __u8 sctp_data_io_event;
 408         __u8 sctp_association_event;
 409         __u8 sctp_address_event;
 410         __u8 sctp_send_failure_event;
 411         __u8 sctp_peer_error_event;
 412         __u8 sctp_shutdown_event;
 413         __u8 sctp_partial_delivery_event;
 414         __u8 sctp_adaptation_layer_event;
 415         __u8 sctp_authentication_event;
 416 };
 417
 418 /*
 419  * 5.3.1 SCTP Notification Structure
 420  *
 421  *   The notification structure is defined as the union of all
 422  *   notification types.
 423  *
 424  */
 425 union sctp_notification {
 426         struct {
 427                 __u16 sn_type;             /* Notification type. */
 428                 __u16 sn_flags;
 429                 __u32 sn_length;
 430         } sn_header;
 431         struct sctp_assoc_change sn_assoc_change;
 432         struct sctp_paddr_change sn_paddr_change;
 433         struct sctp_remote_error sn_remote_error;
 434         struct sctp_send_failed sn_send_failed;
 435         struct sctp_shutdown_event sn_shutdown_event;
 436         struct sctp_adaptation_event sn_adaptation_event;
 437         struct sctp_pdapi_event sn_pdapi_event;
 438         struct sctp_authkey_event sn_authkey_event;
 439 };
 440
 441 /* Section 5.3.1
 442  * All standard values for sn_type flags are greater than 2^15.
 443  * Values from 2^15 and down are reserved.
 444  */
 445
 446 enum sctp_sn_type {
 447         SCTP_SN_TYPE_BASE     = (1<<15),
 448         SCTP_ASSOC_CHANGE,
 449         SCTP_PEER_ADDR_CHANGE,
 450         SCTP_SEND_FAILED,
 451         SCTP_REMOTE_ERROR,
 452         SCTP_SHUTDOWN_EVENT,
 453         SCTP_PARTIAL_DELIVERY_EVENT,
 454         SCTP_ADAPTATION_INDICATION,
 455         SCTP_AUTHENTICATION_INDICATION,
 456 };
 457
 458 /* Notification error codes used to fill up the error fields in some
 459  * notifications.
 460  * SCTP_PEER_ADDRESS_CHAGE      : spc_error
 461  * SCTP_ASSOC_CHANGE            : sac_error
 462  * These names should be potentially included in the draft 04 of the SCTP
 463  * sockets API specification.
 464  */
 465 typedef enum sctp_sn_error {
 466         SCTP_FAILED_THRESHOLD,
 467         SCTP_RECEIVED_SACK,
 468         SCTP_HEARTBEAT_SUCCESS,
 469         SCTP_RESPONSE_TO_USER_REQ,
 470         SCTP_INTERNAL_ERROR,
 471         SCTP_SHUTDOWN_GUARD_EXPIRES,
 472         SCTP_PEER_FAULTY,
 473 } sctp_sn_error_t;
 474
 475 /*
 476  * 7.1.1 Retransmission Timeout Parameters (SCTP_RTOINFO)
 477  *
 478  *   The protocol parameters used to initialize and bound retransmission
 479  *   timeout (RTO) are tunable.  See [SCTP] for more information on how
 480  *   these parameters are used in RTO calculation.
 481  */
 482 struct sctp_rtoinfo {
 483         sctp_assoc_t    srto_assoc_id;
 484         __u32           srto_initial;
 485         __u32           srto_max;
 486         __u32           srto_min;
 487 };
 488
 489 /*
 490  * 7.1.2 Association Parameters (SCTP_ASSOCINFO)
 491  *
 492  *   This option is used to both examine and set various association and
 493  *   endpoint parameters.
 494  */
 495 struct sctp_assocparams {
 496         sctp_assoc_t    sasoc_assoc_id;
 497         __u16           sasoc_asocmaxrxt;
 498         __u16           sasoc_number_peer_destinations;
 499         __u32           sasoc_peer_rwnd;
 500         __u32           sasoc_local_rwnd;
 501         __u32           sasoc_cookie_life;
 502 };
 503
 504 /*
 505  * 7.1.9 Set Peer Primary Address (SCTP_SET_PEER_PRIMARY_ADDR)
 506  *
 507  *  Requests that the peer mark the enclosed address as the association
 508  *  primary. The enclosed address must be one of the association's
 509  *  locally bound addresses. The following structure is used to make a
 510  *   set primary request:
 511  */
 512 struct sctp_setpeerprim {
 513         sctp_assoc_t            sspp_assoc_id;
 514         struct sockaddr_storage sspp_addr;
 515 } __attribute__((packed, aligned(4)));
 516
 517 /*
 518  * 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR)
 519  *
 520  *  Requests that the local SCTP stack use the enclosed peer address as
 521  *  the association primary. The enclosed address must be one of the
 522  *  association peer's addresses. The following structure is used to
 523  *  make a set peer primary request:
 524  */
 525 struct sctp_prim {
 526         sctp_assoc_t            ssp_assoc_id;
 527         struct sockaddr_storage ssp_addr;
 528 } __attribute__((packed, aligned(4)));
 529
 530 /*
 531  * 7.1.11 Set Adaptation Layer Indicator (SCTP_ADAPTATION_LAYER)
 532  *
 533  * Requests that the local endpoint set the specified Adaptation Layer
 534  * Indication parameter for all future INIT and INIT-ACK exchanges.
 535  */
 536 struct sctp_setadaptation {
 537         __u32   ssb_adaptation_ind;
 538 };
 539
 540 /*
 541  * 7.1.13 Peer Address Parameters  (SCTP_PEER_ADDR_PARAMS)
 542  *
 543  *   Applications can enable or disable heartbeats for any peer address
 544  *   of an association, modify an address's heartbeat interval, force a
 545  *   heartbeat to be sent immediately, and adjust the address's maximum
 546  *   number of retransmissions sent before an address is considered
 547  *   unreachable. The following structure is used to access and modify an
 548  *   address's parameters:
 549  */
 550 enum  sctp_spp_flags {
 551         SPP_HB_ENABLE = 1<<0,           /*Enable heartbeats*/
 552         SPP_HB_DISABLE = 1<<1,          /*Disable heartbeats*/
 553         SPP_HB = SPP_HB_ENABLE | SPP_HB_DISABLE,
 554         SPP_HB_DEMAND = 1<<2,           /*Send heartbeat immediately*/
 555         SPP_PMTUD_ENABLE = 1<<3,        /*Enable PMTU discovery*/
 556         SPP_PMTUD_DISABLE = 1<<4,       /*Disable PMTU discovery*/
 557         SPP_PMTUD = SPP_PMTUD_ENABLE | SPP_PMTUD_DISABLE,
 558         SPP_SACKDELAY_ENABLE = 1<<5,    /*Enable SACK*/
 559         SPP_SACKDELAY_DISABLE = 1<<6,   /*Disable SACK*/
 560         SPP_SACKDELAY = SPP_SACKDELAY_ENABLE | SPP_SACKDELAY_DISABLE,
 561         SPP_HB_TIME_IS_ZERO = 1<<7,     /* Set HB delay to 0 */
 562 };
 563
 564 struct sctp_paddrparams {
 565         sctp_assoc_t            spp_assoc_id;
 566         struct sockaddr_storage spp_address;
 567         __u32                   spp_hbinterval;
 568         __u16                   spp_pathmaxrxt;
 569         __u32                   spp_pathmtu;
 570         __u32                   spp_sackdelay;
 571         __u32                   spp_flags;
 572 } __attribute__((packed, aligned(4)));
 573
 574 /*
 575  * 7.1.18.  Add a chunk that must be authenticated (SCTP_AUTH_CHUNK)
 576  *
 577  * This set option adds a chunk type that the user is requesting to be
 578  * received only in an authenticated way.  Changes to the list of chunks
 579  * will only effect future associations on the socket.
 580  */
 581 struct sctp_authchunk {
 582         __u8            sauth_chunk;
 583 };
 584
 585 /*
 586  * 7.1.19.  Get or set the list of supported HMAC Identifiers (SCTP_HMAC_IDENT)
 587  *
 588  * This option gets or sets the list of HMAC algorithms that the local
 589  * endpoint requires the peer to use.
 590 */
 591 struct sctp_hmacalgo {
 592         __u32           shmac_num_idents;
 593         __u16           shmac_idents[];
 594 };
 595
 596 /*
 597  * 7.1.20.  Set a shared key (SCTP_AUTH_KEY)
 598  *
 599  * This option will set a shared secret key which is used to build an
 600  * association shared key.
 601  */
 602 struct sctp_authkey {
 603         sctp_assoc_t    sca_assoc_id;
 604         __u16           sca_keynumber;
 605         __u16           sca_keylength;
 606         __u8            sca_key[];
 607 };
 608
 609 /*
 610  * 7.1.21.  Get or set the active shared key (SCTP_AUTH_ACTIVE_KEY)
 611  *
 612  * This option will get or set the active shared key to be used to build
 613  * the association shared key.
 614  */
 615
 616 struct sctp_authkeyid {
 617         sctp_assoc_t    scact_assoc_id;
 618         __u16           scact_keynumber;
 619 };
 620
 621
 622 /*
 623  * 7.1.23.  Get or set delayed ack timer (SCTP_DELAYED_SACK)
 624  *
 625  * This option will effect the way delayed acks are performed.  This
 626  * option allows you to get or set the delayed ack time, in
 627  * milliseconds.  It also allows changing the delayed ack frequency.
 628  * Changing the frequency to 1 disables the delayed sack algorithm.  If
 629  * the assoc_id is 0, then this sets or gets the endpoints default
 630  * values.  If the assoc_id field is non-zero, then the set or get
 631  * effects the specified association for the one to many model (the
 632  * assoc_id field is ignored by the one to one model).  Note that if
 633  * sack_delay or sack_freq are 0 when setting this option, then the
 634  * current values will remain unchanged.
 635  */
 636 struct sctp_sack_info {
 637         sctp_assoc_t    sack_assoc_id;
 638         uint32_t        sack_delay;
 639         uint32_t        sack_freq;
 640 };
 641
 642 struct sctp_assoc_value {
 643     sctp_assoc_t            assoc_id;
 644     uint32_t                assoc_value;
 645 };
 646
 647 /*
 648  * 7.2.2 Peer Address Information
 649  *
 650  *   Applications can retrieve information about a specific peer address
 651  *   of an association, including its reachability state, congestion
 652  *   window, and retransmission timer values.  This information is
 653  *   read-only. The following structure is used to access this
 654  *   information:
 655  */
 656 struct sctp_paddrinfo {
 657         sctp_assoc_t            spinfo_assoc_id;
 658         struct sockaddr_storage spinfo_address;
 659         __s32                   spinfo_state;
 660         __u32                   spinfo_cwnd;
 661         __u32                   spinfo_srtt;
 662         __u32                   spinfo_rto;
 663         __u32                   spinfo_mtu;
 664 } __attribute__((packed, aligned(4)));
 665
 666 /* Peer addresses's state. */
 667 /* UNKNOWN: Peer address passed by the upper layer in sendmsg or connect[x]
 668  * calls.
 669  * UNCONFIRMED: Peer address received in INIT/INIT-ACK address parameters.
 670  *              Not yet confirmed by a heartbeat and not available for data
 671  *              transfers.
 672  * ACTIVE : Peer address confirmed, active and available for data transfers.
 673  * INACTIVE: Peer address inactive and not available for data transfers.
 674  */
 675 enum sctp_spinfo_state {
 676         SCTP_INACTIVE,
 677         SCTP_ACTIVE,
 678         SCTP_UNCONFIRMED,
 679         SCTP_UNKNOWN = 0xffff  /* Value used for transport state unknown */
 680 };
 681
 682 /*
 683  * 7.2.1 Association Status (SCTP_STATUS)
 684  *
 685  *   Applications can retrieve current status information about an
 686  *   association, including association state, peer receiver window size,
 687  *   number of unacked data chunks, and number of data chunks pending
 688  *   receipt.  This information is read-only.  The following structure is
 689  *   used to access this information:
 690  */
 691 struct sctp_status {
 692         sctp_assoc_t            sstat_assoc_id;
 693         __s32                   sstat_state;
 694         __u32                   sstat_rwnd;
 695         __u16                   sstat_unackdata;
 696         __u16                   sstat_penddata;
 697         __u16                   sstat_instrms;
 698         __u16                   sstat_outstrms;
 699         __u32                   sstat_fragmentation_point;
 700         struct sctp_paddrinfo   sstat_primary;
 701 };
 702
 703 /*
 704  * 7.2.3.  Get the list of chunks the peer requires to be authenticated
 705  *         (SCTP_PEER_AUTH_CHUNKS)
 706  *
 707  * This option gets a list of chunks for a specified association that
 708  * the peer requires to be received authenticated only.
 709  */
 710 struct sctp_authchunks {
 711         sctp_assoc_t    gauth_assoc_id;
 712         __u32           gauth_number_of_chunks;
 713         uint8_t         gauth_chunks[];
 714 };
 715
 716 /*
 717  * 8.3, 8.5 get all peer/local addresses in an association.
 718  * This parameter struct is used by SCTP_GET_PEER_ADDRS and
 719  * SCTP_GET_LOCAL_ADDRS socket options used internally to implement
 720  * sctp_getpaddrs() and sctp_getladdrs() API.
 721  */
 722 struct sctp_getaddrs_old {
 723         sctp_assoc_t            assoc_id;
 724         int                     addr_num;
 725         struct sockaddr         __user *addrs;
 726 };
 727 struct sctp_getaddrs {
 728         sctp_assoc_t            assoc_id; /*input*/
 729         __u32                   addr_num; /*output*/
 730         __u8                    addrs[0]; /*output, variable size*/
 731 };
 732
 733 /* These are bit fields for msghdr->msg_flags.  See section 5.1.  */
 734 /* On user space Linux, these live in <bits/socket.h> as an enum.  */
 735 enum sctp_msg_flags {
 736         MSG_NOTIFICATION = 0x8000,
 737 #define MSG_NOTIFICATION MSG_NOTIFICATION
 738 };
 739
 740 /*
 741  * 8.1 sctp_bindx()
 742  *
 743  * The flags parameter is formed from the bitwise OR of zero or more of the
 744  * following currently defined flags:
 745  */
 746 #define SCTP_BINDX_ADD_ADDR 0x01
 747 #define SCTP_BINDX_REM_ADDR 0x02
 748
 749 /* This is the structure that is passed as an argument(optval) to
 750  * getsockopt(SCTP_SOCKOPT_PEELOFF).
 751  */
 752 typedef struct {
 753         sctp_assoc_t associd;
 754         int sd;
 755 } sctp_peeloff_arg_t;
 756
 757 #endif /* __net_sctp_user_h__ */