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 #define SCTP_RECVRCVINFO        32
  99 #define SCTP_RECVNXTINFO        33
 100 #define SCTP_DEFAULT_SNDINFO    34
 101
 102 /* Internal Socket Options. Some of the sctp library functions are
 103  * implemented using these socket options.
 104  */
 105 #define SCTP_SOCKOPT_BINDX_ADD  100     /* BINDX requests for adding addrs */
 106 #define SCTP_SOCKOPT_BINDX_REM  101     /* BINDX requests for removing addrs. */
 107 #define SCTP_SOCKOPT_PEELOFF    102     /* peel off association. */
 108 /* Options 104-106 are deprecated and removed. Do not use this space */
 109 #define SCTP_SOCKOPT_CONNECTX_OLD       107     /* CONNECTX old requests. */
 110 #define SCTP_GET_PEER_ADDRS     108             /* Get all peer address. */
 111 #define SCTP_GET_LOCAL_ADDRS    109             /* Get all local address. */
 112 #define SCTP_SOCKOPT_CONNECTX   110             /* CONNECTX requests. */
 113 #define SCTP_SOCKOPT_CONNECTX3  111     /* CONNECTX requests (updated) */
 114 #define SCTP_GET_ASSOC_STATS    112     /* Read only */
 115 #define SCTP_PR_SUPPORTED       113
 116
 117 /* These are bit fields for msghdr->msg_flags.  See section 5.1.  */
 118 /* On user space Linux, these live in <bits/socket.h> as an enum.  */
 119 enum sctp_msg_flags {
 120         MSG_NOTIFICATION = 0x8000,
 121 #define MSG_NOTIFICATION MSG_NOTIFICATION
 122 };
 123
 124 /* 5.3.1 SCTP Initiation Structure (SCTP_INIT)
 125  *
 126  *   This cmsghdr structure provides information for initializing new
 127  *   SCTP associations with sendmsg().  The SCTP_INITMSG socket option
 128  *   uses this same data structure.  This structure is not used for
 129  *   recvmsg().
 130  *
 131  *   cmsg_level    cmsg_type      cmsg_data[]
 132  *   ------------  ------------   ----------------------
 133  *   IPPROTO_SCTP  SCTP_INIT      struct sctp_initmsg
 134  */
 135 struct sctp_initmsg {
 136         __u16 sinit_num_ostreams;
 137         __u16 sinit_max_instreams;
 138         __u16 sinit_max_attempts;
 139         __u16 sinit_max_init_timeo;
 140 };
 141
 142 /* 5.3.2 SCTP Header Information Structure (SCTP_SNDRCV)
 143  *
 144  *   This cmsghdr structure specifies SCTP options for sendmsg() and
 145  *   describes SCTP header information about a received message through
 146  *   recvmsg().
 147  *
 148  *   cmsg_level    cmsg_type      cmsg_data[]
 149  *   ------------  ------------   ----------------------
 150  *   IPPROTO_SCTP  SCTP_SNDRCV    struct sctp_sndrcvinfo
 151  */
 152 struct sctp_sndrcvinfo {
 153         __u16 sinfo_stream;
 154         __u16 sinfo_ssn;
 155         __u16 sinfo_flags;
 156         __u32 sinfo_ppid;
 157         __u32 sinfo_context;
 158         __u32 sinfo_timetolive;
 159         __u32 sinfo_tsn;
 160         __u32 sinfo_cumtsn;
 161         sctp_assoc_t sinfo_assoc_id;
 162 };
 163
 164 /* 5.3.4 SCTP Send Information Structure (SCTP_SNDINFO)
 165  *
 166  *   This cmsghdr structure specifies SCTP options for sendmsg().
 167  *
 168  *   cmsg_level    cmsg_type      cmsg_data[]
 169  *   ------------  ------------   -------------------
 170  *   IPPROTO_SCTP  SCTP_SNDINFO   struct sctp_sndinfo
 171  */
 172 struct sctp_sndinfo {
 173         __u16 snd_sid;
 174         __u16 snd_flags;
 175         __u32 snd_ppid;
 176         __u32 snd_context;
 177         sctp_assoc_t snd_assoc_id;
 178 };
 179
 180 /* 5.3.5 SCTP Receive Information Structure (SCTP_RCVINFO)
 181  *
 182  *   This cmsghdr structure describes SCTP receive information
 183  *   about a received message through recvmsg().
 184  *
 185  *   cmsg_level    cmsg_type      cmsg_data[]
 186  *   ------------  ------------   -------------------
 187  *   IPPROTO_SCTP  SCTP_RCVINFO   struct sctp_rcvinfo
 188  */
 189 struct sctp_rcvinfo {
 190         __u16 rcv_sid;
 191         __u16 rcv_ssn;
 192         __u16 rcv_flags;
 193         __u32 rcv_ppid;
 194         __u32 rcv_tsn;
 195         __u32 rcv_cumtsn;
 196         __u32 rcv_context;
 197         sctp_assoc_t rcv_assoc_id;
 198 };
 199
 200 /* 5.3.6 SCTP Next Receive Information Structure (SCTP_NXTINFO)
 201  *
 202  *   This cmsghdr structure describes SCTP receive information
 203  *   of the next message that will be delivered through recvmsg()
 204  *   if this information is already available when delivering
 205  *   the current message.
 206  *
 207  *   cmsg_level    cmsg_type      cmsg_data[]
 208  *   ------------  ------------   -------------------
 209  *   IPPROTO_SCTP  SCTP_NXTINFO   struct sctp_nxtinfo
 210  */
 211 struct sctp_nxtinfo {
 212         __u16 nxt_sid;
 213         __u16 nxt_flags;
 214         __u32 nxt_ppid;
 215         __u32 nxt_length;
 216         sctp_assoc_t nxt_assoc_id;
 217 };
 218
 219 /*
 220  *  sinfo_flags: 16 bits (unsigned integer)
 221  *
 222  *   This field may contain any of the following flags and is composed of
 223  *   a bitwise OR of these values.
 224  */
 225 enum sctp_sinfo_flags {
 226         SCTP_UNORDERED          = (1 << 0), /* Send/receive message unordered. */
 227         SCTP_ADDR_OVER          = (1 << 1), /* Override the primary destination. */
 228         SCTP_ABORT              = (1 << 2), /* Send an ABORT message to the peer. */
 229         SCTP_SACK_IMMEDIATELY   = (1 << 3), /* SACK should be sent without delay. */
 230         SCTP_NOTIFICATION       = MSG_NOTIFICATION, /* Next message is not user msg but notification. */
 231         SCTP_EOF                = MSG_FIN,  /* Initiate graceful shutdown process. */
 232 };
 233
 234 typedef union {
 235         __u8                    raw;
 236         struct sctp_initmsg     init;
 237         struct sctp_sndrcvinfo  sndrcv;
 238 } sctp_cmsg_data_t;
 239
 240 /* These are cmsg_types.  */
 241 typedef enum sctp_cmsg_type {
 242         SCTP_INIT,              /* 5.2.1 SCTP Initiation Structure */
 243 #define SCTP_INIT       SCTP_INIT
 244         SCTP_SNDRCV,            /* 5.2.2 SCTP Header Information Structure */
 245 #define SCTP_SNDRCV     SCTP_SNDRCV
 246         SCTP_SNDINFO,           /* 5.3.4 SCTP Send Information Structure */
 247 #define SCTP_SNDINFO    SCTP_SNDINFO
 248         SCTP_RCVINFO,           /* 5.3.5 SCTP Receive Information Structure */
 249 #define SCTP_RCVINFO    SCTP_RCVINFO
 250         SCTP_NXTINFO,           /* 5.3.6 SCTP Next Receive Information Structure */
 251 #define SCTP_NXTINFO    SCTP_NXTINFO
 252 } sctp_cmsg_t;
 253
 254 /*
 255  * 5.3.1.1 SCTP_ASSOC_CHANGE
 256  *
 257  *   Communication notifications inform the ULP that an SCTP association
 258  *   has either begun or ended. The identifier for a new association is
 259  *   provided by this notificaion. The notification information has the
 260  *   following format:
 261  *
 262  */
 263 struct sctp_assoc_change {
 264         __u16 sac_type;
 265         __u16 sac_flags;
 266         __u32 sac_length;
 267         __u16 sac_state;
 268         __u16 sac_error;
 269         __u16 sac_outbound_streams;
 270         __u16 sac_inbound_streams;
 271         sctp_assoc_t sac_assoc_id;
 272         __u8 sac_info[0];
 273 };
 274
 275 /*
 276  *   sac_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 association.  They include:
 280  *
 281  *   Note:  The following state names deviate from the API draft as
 282  *   the names clash too easily with other kernel symbols.
 283  */
 284 enum sctp_sac_state {
 285         SCTP_COMM_UP,
 286         SCTP_COMM_LOST,
 287         SCTP_RESTART,
 288         SCTP_SHUTDOWN_COMP,
 289         SCTP_CANT_STR_ASSOC,
 290 };
 291
 292 /*
 293  * 5.3.1.2 SCTP_PEER_ADDR_CHANGE
 294  *
 295  *   When a destination address on a multi-homed peer encounters a change
 296  *   an interface details event is sent.  The information has the
 297  *   following structure:
 298  */
 299 struct sctp_paddr_change {
 300         __u16 spc_type;
 301         __u16 spc_flags;
 302         __u32 spc_length;
 303         struct sockaddr_storage spc_aaddr;
 304         int spc_state;
 305         int spc_error;
 306         sctp_assoc_t spc_assoc_id;
 307 } __attribute__((packed, aligned(4)));
 308
 309 /*
 310  *    spc_state:  32 bits (signed integer)
 311  *
 312  *   This field holds one of a number of values that communicate the
 313  *   event that happened to the address.  They include:
 314  */
 315 enum sctp_spc_state {
 316         SCTP_ADDR_AVAILABLE,
 317         SCTP_ADDR_UNREACHABLE,
 318         SCTP_ADDR_REMOVED,
 319         SCTP_ADDR_ADDED,
 320         SCTP_ADDR_MADE_PRIM,
 321         SCTP_ADDR_CONFIRMED,
 322 };
 323
 324
 325 /*
 326  * 5.3.1.3 SCTP_REMOTE_ERROR
 327  *
 328  *   A remote peer may send an Operational Error message to its peer.
 329  *   This message indicates a variety of error conditions on an
 330  *   association. The entire error TLV as it appears on the wire is
 331  *   included in a SCTP_REMOTE_ERROR event.  Please refer to the SCTP
 332  *   specification [SCTP] and any extensions for a list of possible
 333  *   error formats. SCTP error TLVs have the format:
 334  */
 335 struct sctp_remote_error {
 336         __u16 sre_type;
 337         __u16 sre_flags;
 338         __u32 sre_length;
 339         __u16 sre_error;
 340         sctp_assoc_t sre_assoc_id;
 341         __u8 sre_data[0];
 342 };
 343
 344
 345 /*
 346  * 5.3.1.4 SCTP_SEND_FAILED
 347  *
 348  *   If SCTP cannot deliver a message it may return the message as a
 349  *   notification.
 350  */
 351 struct sctp_send_failed {
 352         __u16 ssf_type;
 353         __u16 ssf_flags;
 354         __u32 ssf_length;
 355         __u32 ssf_error;
 356         struct sctp_sndrcvinfo ssf_info;
 357         sctp_assoc_t ssf_assoc_id;
 358         __u8 ssf_data[0];
 359 };
 360
 361 /*
 362  *   ssf_flags: 16 bits (unsigned integer)
 363  *
 364  *   The flag value will take one of the following values
 365  *
 366  *   SCTP_DATA_UNSENT  - Indicates that the data was never put on
 367  *                       the wire.
 368  *
 369  *   SCTP_DATA_SENT    - Indicates that the data was put on the wire.
 370  *                       Note that this does not necessarily mean that the
 371  *                       data was (or was not) successfully delivered.
 372  */
 373 enum sctp_ssf_flags {
 374         SCTP_DATA_UNSENT,
 375         SCTP_DATA_SENT,
 376 };
 377
 378 /*
 379  * 5.3.1.5 SCTP_SHUTDOWN_EVENT
 380  *
 381  *   When a peer sends a SHUTDOWN, SCTP delivers this notification to
 382  *   inform the application that it should cease sending data.
 383  */
 384 struct sctp_shutdown_event {
 385         __u16 sse_type;
 386         __u16 sse_flags;
 387         __u32 sse_length;
 388         sctp_assoc_t sse_assoc_id;
 389 };
 390
 391 /*
 392  * 5.3.1.6 SCTP_ADAPTATION_INDICATION
 393  *
 394  *   When a peer sends a Adaptation Layer Indication parameter , SCTP
 395  *   delivers this notification to inform the application
 396  *   that of the peers requested adaptation layer.
 397  */
 398 struct sctp_adaptation_event {
 399         __u16 sai_type;
 400         __u16 sai_flags;
 401         __u32 sai_length;
 402         __u32 sai_adaptation_ind;
 403         sctp_assoc_t sai_assoc_id;
 404 };
 405
 406 /*
 407  * 5.3.1.7 SCTP_PARTIAL_DELIVERY_EVENT
 408  *
 409  *   When a receiver is engaged in a partial delivery of a
 410  *   message this notification will be used to indicate
 411  *   various events.
 412  */
 413 struct sctp_pdapi_event {
 414         __u16 pdapi_type;
 415         __u16 pdapi_flags;
 416         __u32 pdapi_length;
 417         __u32 pdapi_indication;
 418         sctp_assoc_t pdapi_assoc_id;
 419 };
 420
 421 enum { SCTP_PARTIAL_DELIVERY_ABORTED=0, };
 422
 423 /*
 424  * 5.3.1.8.  SCTP_AUTHENTICATION_EVENT
 425  *
 426  *  When a receiver is using authentication this message will provide
 427  *  notifications regarding new keys being made active as well as errors.
 428  */
 429 struct sctp_authkey_event {
 430         __u16 auth_type;
 431         __u16 auth_flags;
 432         __u32 auth_length;
 433         __u16 auth_keynumber;
 434         __u16 auth_altkeynumber;
 435         __u32 auth_indication;
 436         sctp_assoc_t auth_assoc_id;
 437 };
 438
 439 enum { SCTP_AUTH_NEWKEY = 0, };
 440
 441 /*
 442  * 6.1.9. SCTP_SENDER_DRY_EVENT
 443  *
 444  * When the SCTP stack has no more user data to send or retransmit, this
 445  * notification is given to the user. Also, at the time when a user app
 446  * subscribes to this event, if there is no data to be sent or
 447  * retransmit, the stack will immediately send up this notification.
 448  */
 449 struct sctp_sender_dry_event {
 450         __u16 sender_dry_type;
 451         __u16 sender_dry_flags;
 452         __u32 sender_dry_length;
 453         sctp_assoc_t sender_dry_assoc_id;
 454 };
 455
 456 /*
 457  * Described in Section 7.3
 458  *   Ancillary Data and Notification Interest Options
 459  */
 460 struct sctp_event_subscribe {
 461         __u8 sctp_data_io_event;
 462         __u8 sctp_association_event;
 463         __u8 sctp_address_event;
 464         __u8 sctp_send_failure_event;
 465         __u8 sctp_peer_error_event;
 466         __u8 sctp_shutdown_event;
 467         __u8 sctp_partial_delivery_event;
 468         __u8 sctp_adaptation_layer_event;
 469         __u8 sctp_authentication_event;
 470         __u8 sctp_sender_dry_event;
 471 };
 472
 473 /*
 474  * 5.3.1 SCTP Notification Structure
 475  *
 476  *   The notification structure is defined as the union of all
 477  *   notification types.
 478  *
 479  */
 480 union sctp_notification {
 481         struct {
 482                 __u16 sn_type;             /* Notification type. */
 483                 __u16 sn_flags;
 484                 __u32 sn_length;
 485         } sn_header;
 486         struct sctp_assoc_change sn_assoc_change;
 487         struct sctp_paddr_change sn_paddr_change;
 488         struct sctp_remote_error sn_remote_error;
 489         struct sctp_send_failed sn_send_failed;
 490         struct sctp_shutdown_event sn_shutdown_event;
 491         struct sctp_adaptation_event sn_adaptation_event;
 492         struct sctp_pdapi_event sn_pdapi_event;
 493         struct sctp_authkey_event sn_authkey_event;
 494         struct sctp_sender_dry_event sn_sender_dry_event;
 495 };
 496
 497 /* Section 5.3.1
 498  * All standard values for sn_type flags are greater than 2^15.
 499  * Values from 2^15 and down are reserved.
 500  */
 501
 502 enum sctp_sn_type {
 503         SCTP_SN_TYPE_BASE     = (1<<15),
 504         SCTP_ASSOC_CHANGE,
 505 #define SCTP_ASSOC_CHANGE               SCTP_ASSOC_CHANGE
 506         SCTP_PEER_ADDR_CHANGE,
 507 #define SCTP_PEER_ADDR_CHANGE           SCTP_PEER_ADDR_CHANGE
 508         SCTP_SEND_FAILED,
 509 #define SCTP_SEND_FAILED                SCTP_SEND_FAILED
 510         SCTP_REMOTE_ERROR,
 511 #define SCTP_REMOTE_ERROR               SCTP_REMOTE_ERROR
 512         SCTP_SHUTDOWN_EVENT,
 513 #define SCTP_SHUTDOWN_EVENT             SCTP_SHUTDOWN_EVENT
 514         SCTP_PARTIAL_DELIVERY_EVENT,
 515 #define SCTP_PARTIAL_DELIVERY_EVENT     SCTP_PARTIAL_DELIVERY_EVENT
 516         SCTP_ADAPTATION_INDICATION,
 517 #define SCTP_ADAPTATION_INDICATION      SCTP_ADAPTATION_INDICATION
 518         SCTP_AUTHENTICATION_EVENT,
 519 #define SCTP_AUTHENTICATION_INDICATION  SCTP_AUTHENTICATION_EVENT
 520         SCTP_SENDER_DRY_EVENT,
 521 #define SCTP_SENDER_DRY_EVENT           SCTP_SENDER_DRY_EVENT
 522 };
 523
 524 /* Notification error codes used to fill up the error fields in some
 525  * notifications.
 526  * SCTP_PEER_ADDRESS_CHAGE      : spc_error
 527  * SCTP_ASSOC_CHANGE            : sac_error
 528  * These names should be potentially included in the draft 04 of the SCTP
 529  * sockets API specification.
 530  */
 531 typedef enum sctp_sn_error {
 532         SCTP_FAILED_THRESHOLD,
 533         SCTP_RECEIVED_SACK,
 534         SCTP_HEARTBEAT_SUCCESS,
 535         SCTP_RESPONSE_TO_USER_REQ,
 536         SCTP_INTERNAL_ERROR,
 537         SCTP_SHUTDOWN_GUARD_EXPIRES,
 538         SCTP_PEER_FAULTY,
 539 } sctp_sn_error_t;
 540
 541 /*
 542  * 7.1.1 Retransmission Timeout Parameters (SCTP_RTOINFO)
 543  *
 544  *   The protocol parameters used to initialize and bound retransmission
 545  *   timeout (RTO) are tunable.  See [SCTP] for more information on how
 546  *   these parameters are used in RTO calculation.
 547  */
 548 struct sctp_rtoinfo {
 549         sctp_assoc_t    srto_assoc_id;
 550         __u32           srto_initial;
 551         __u32           srto_max;
 552         __u32           srto_min;
 553 };
 554
 555 /*
 556  * 7.1.2 Association Parameters (SCTP_ASSOCINFO)
 557  *
 558  *   This option is used to both examine and set various association and
 559  *   endpoint parameters.
 560  */
 561 struct sctp_assocparams {
 562         sctp_assoc_t    sasoc_assoc_id;
 563         __u16           sasoc_asocmaxrxt;
 564         __u16           sasoc_number_peer_destinations;
 565         __u32           sasoc_peer_rwnd;
 566         __u32           sasoc_local_rwnd;
 567         __u32           sasoc_cookie_life;
 568 };
 569
 570 /*
 571  * 7.1.9 Set Peer Primary Address (SCTP_SET_PEER_PRIMARY_ADDR)
 572  *
 573  *  Requests that the peer mark the enclosed address as the association
 574  *  primary. The enclosed address must be one of the association's
 575  *  locally bound addresses. The following structure is used to make a
 576  *   set primary request:
 577  */
 578 struct sctp_setpeerprim {
 579         sctp_assoc_t            sspp_assoc_id;
 580         struct sockaddr_storage sspp_addr;
 581 } __attribute__((packed, aligned(4)));
 582
 583 /*
 584  * 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR)
 585  *
 586  *  Requests that the local SCTP stack use the enclosed peer address as
 587  *  the association primary. The enclosed address must be one of the
 588  *  association peer's addresses. The following structure is used to
 589  *  make a set peer primary request:
 590  */
 591 struct sctp_prim {
 592         sctp_assoc_t            ssp_assoc_id;
 593         struct sockaddr_storage ssp_addr;
 594 } __attribute__((packed, aligned(4)));
 595
 596 /* For backward compatibility use, define the old name too */
 597 #define sctp_setprim    sctp_prim
 598
 599 /*
 600  * 7.1.11 Set Adaptation Layer Indicator (SCTP_ADAPTATION_LAYER)
 601  *
 602  * Requests that the local endpoint set the specified Adaptation Layer
 603  * Indication parameter for all future INIT and INIT-ACK exchanges.
 604  */
 605 struct sctp_setadaptation {
 606         __u32   ssb_adaptation_ind;
 607 };
 608
 609 /*
 610  * 7.1.13 Peer Address Parameters  (SCTP_PEER_ADDR_PARAMS)
 611  *
 612  *   Applications can enable or disable heartbeats for any peer address
 613  *   of an association, modify an address's heartbeat interval, force a
 614  *   heartbeat to be sent immediately, and adjust the address's maximum
 615  *   number of retransmissions sent before an address is considered
 616  *   unreachable. The following structure is used to access and modify an
 617  *   address's parameters:
 618  */
 619 enum  sctp_spp_flags {
 620         SPP_HB_ENABLE = 1<<0,           /*Enable heartbeats*/
 621         SPP_HB_DISABLE = 1<<1,          /*Disable heartbeats*/
 622         SPP_HB = SPP_HB_ENABLE | SPP_HB_DISABLE,
 623         SPP_HB_DEMAND = 1<<2,           /*Send heartbeat immediately*/
 624         SPP_PMTUD_ENABLE = 1<<3,        /*Enable PMTU discovery*/
 625         SPP_PMTUD_DISABLE = 1<<4,       /*Disable PMTU discovery*/
 626         SPP_PMTUD = SPP_PMTUD_ENABLE | SPP_PMTUD_DISABLE,
 627         SPP_SACKDELAY_ENABLE = 1<<5,    /*Enable SACK*/
 628         SPP_SACKDELAY_DISABLE = 1<<6,   /*Disable SACK*/
 629         SPP_SACKDELAY = SPP_SACKDELAY_ENABLE | SPP_SACKDELAY_DISABLE,
 630         SPP_HB_TIME_IS_ZERO = 1<<7,     /* Set HB delay to 0 */
 631 };
 632
 633 struct sctp_paddrparams {
 634         sctp_assoc_t            spp_assoc_id;
 635         struct sockaddr_storage spp_address;
 636         __u32                   spp_hbinterval;
 637         __u16                   spp_pathmaxrxt;
 638         __u32                   spp_pathmtu;
 639         __u32                   spp_sackdelay;
 640         __u32                   spp_flags;
 641 } __attribute__((packed, aligned(4)));
 642
 643 /*
 644  * 7.1.18.  Add a chunk that must be authenticated (SCTP_AUTH_CHUNK)
 645  *
 646  * This set option adds a chunk type that the user is requesting to be
 647  * received only in an authenticated way.  Changes to the list of chunks
 648  * will only effect future associations on the socket.
 649  */
 650 struct sctp_authchunk {
 651         __u8            sauth_chunk;
 652 };
 653
 654 /*
 655  * 7.1.19.  Get or set the list of supported HMAC Identifiers (SCTP_HMAC_IDENT)
 656  *
 657  * This option gets or sets the list of HMAC algorithms that the local
 658  * endpoint requires the peer to use.
 659  */
 660 #ifndef __KERNEL__
 661 /* This here is only used by user space as is. It might not be a good idea
 662  * to export/reveal the whole structure with reserved fields etc.
 663  */
 664 enum {
 665         SCTP_AUTH_HMAC_ID_SHA1 = 1,
 666         SCTP_AUTH_HMAC_ID_SHA256 = 3,
 667 };
 668 #endif
 669
 670 struct sctp_hmacalgo {
 671         __u32           shmac_num_idents;
 672         __u16           shmac_idents[];
 673 };
 674
 675 /* Sadly, user and kernel space have different names for
 676  * this structure member, so this is to not break anything.
 677  */
 678 #define shmac_number_of_idents  shmac_num_idents
 679
 680 /*
 681  * 7.1.20.  Set a shared key (SCTP_AUTH_KEY)
 682  *
 683  * This option will set a shared secret key which is used to build an
 684  * association shared key.
 685  */
 686 struct sctp_authkey {
 687         sctp_assoc_t    sca_assoc_id;
 688         __u16           sca_keynumber;
 689         __u16           sca_keylength;
 690         __u8            sca_key[];
 691 };
 692
 693 /*
 694  * 7.1.21.  Get or set the active shared key (SCTP_AUTH_ACTIVE_KEY)
 695  *
 696  * This option will get or set the active shared key to be used to build
 697  * the association shared key.
 698  */
 699
 700 struct sctp_authkeyid {
 701         sctp_assoc_t    scact_assoc_id;
 702         __u16           scact_keynumber;
 703 };
 704
 705
 706 /*
 707  * 7.1.23.  Get or set delayed ack timer (SCTP_DELAYED_SACK)
 708  *
 709  * This option will effect the way delayed acks are performed.  This
 710  * option allows you to get or set the delayed ack time, in
 711  * milliseconds.  It also allows changing the delayed ack frequency.
 712  * Changing the frequency to 1 disables the delayed sack algorithm.  If
 713  * the assoc_id is 0, then this sets or gets the endpoints default
 714  * values.  If the assoc_id field is non-zero, then the set or get
 715  * effects the specified association for the one to many model (the
 716  * assoc_id field is ignored by the one to one model).  Note that if
 717  * sack_delay or sack_freq are 0 when setting this option, then the
 718  * current values will remain unchanged.
 719  */
 720 struct sctp_sack_info {
 721         sctp_assoc_t    sack_assoc_id;
 722         uint32_t        sack_delay;
 723         uint32_t        sack_freq;
 724 };
 725
 726 struct sctp_assoc_value {
 727     sctp_assoc_t            assoc_id;
 728     uint32_t                assoc_value;
 729 };
 730
 731 /*
 732  * 7.2.2 Peer Address Information
 733  *
 734  *   Applications can retrieve information about a specific peer address
 735  *   of an association, including its reachability state, congestion
 736  *   window, and retransmission timer values.  This information is
 737  *   read-only. The following structure is used to access this
 738  *   information:
 739  */
 740 struct sctp_paddrinfo {
 741         sctp_assoc_t            spinfo_assoc_id;
 742         struct sockaddr_storage spinfo_address;
 743         __s32                   spinfo_state;
 744         __u32                   spinfo_cwnd;
 745         __u32                   spinfo_srtt;
 746         __u32                   spinfo_rto;
 747         __u32                   spinfo_mtu;
 748 } __attribute__((packed, aligned(4)));
 749
 750 /* Peer addresses's state. */
 751 /* UNKNOWN: Peer address passed by the upper layer in sendmsg or connect[x]
 752  * calls.
 753  * UNCONFIRMED: Peer address received in INIT/INIT-ACK address parameters.
 754  *              Not yet confirmed by a heartbeat and not available for data
 755  *              transfers.
 756  * ACTIVE : Peer address confirmed, active and available for data transfers.
 757  * INACTIVE: Peer address inactive and not available for data transfers.
 758  */
 759 enum sctp_spinfo_state {
 760         SCTP_INACTIVE,
 761         SCTP_PF,
 762         SCTP_ACTIVE,
 763         SCTP_UNCONFIRMED,
 764         SCTP_UNKNOWN = 0xffff  /* Value used for transport state unknown */
 765 };
 766
 767 /*
 768  * 7.2.1 Association Status (SCTP_STATUS)
 769  *
 770  *   Applications can retrieve current status information about an
 771  *   association, including association state, peer receiver window size,
 772  *   number of unacked data chunks, and number of data chunks pending
 773  *   receipt.  This information is read-only.  The following structure is
 774  *   used to access this information:
 775  */
 776 struct sctp_status {
 777         sctp_assoc_t            sstat_assoc_id;
 778         __s32                   sstat_state;
 779         __u32                   sstat_rwnd;
 780         __u16                   sstat_unackdata;
 781         __u16                   sstat_penddata;
 782         __u16                   sstat_instrms;
 783         __u16                   sstat_outstrms;
 784         __u32                   sstat_fragmentation_point;
 785         struct sctp_paddrinfo   sstat_primary;
 786 };
 787
 788 /*
 789  * 7.2.3.  Get the list of chunks the peer requires to be authenticated
 790  *         (SCTP_PEER_AUTH_CHUNKS)
 791  *
 792  * This option gets a list of chunks for a specified association that
 793  * the peer requires to be received authenticated only.
 794  */
 795 struct sctp_authchunks {
 796         sctp_assoc_t    gauth_assoc_id;
 797         __u32           gauth_number_of_chunks;
 798         uint8_t         gauth_chunks[];
 799 };
 800
 801 /* The broken spelling has been released already in lksctp-tools header,
 802  * so don't break anyone, now that it's fixed.
 803  */
 804 #define guth_number_of_chunks   gauth_number_of_chunks
 805
 806 /* Association states.  */
 807 enum sctp_sstat_state {
 808         SCTP_EMPTY                = 0,
 809         SCTP_CLOSED               = 1,
 810         SCTP_COOKIE_WAIT          = 2,
 811         SCTP_COOKIE_ECHOED        = 3,
 812         SCTP_ESTABLISHED          = 4,
 813         SCTP_SHUTDOWN_PENDING     = 5,
 814         SCTP_SHUTDOWN_SENT        = 6,
 815         SCTP_SHUTDOWN_RECEIVED    = 7,
 816         SCTP_SHUTDOWN_ACK_SENT    = 8,
 817 };
 818
 819 /*
 820  * 8.2.6. Get the Current Identifiers of Associations
 821  *        (SCTP_GET_ASSOC_ID_LIST)
 822  *
 823  * This option gets the current list of SCTP association identifiers of
 824  * the SCTP associations handled by a one-to-many style socket.
 825  */
 826 struct sctp_assoc_ids {
 827         __u32           gaids_number_of_ids;
 828         sctp_assoc_t    gaids_assoc_id[];
 829 };
 830
 831 /*
 832  * 8.3, 8.5 get all peer/local addresses in an association.
 833  * This parameter struct is used by SCTP_GET_PEER_ADDRS and
 834  * SCTP_GET_LOCAL_ADDRS socket options used internally to implement
 835  * sctp_getpaddrs() and sctp_getladdrs() API.
 836  */
 837 struct sctp_getaddrs_old {
 838         sctp_assoc_t            assoc_id;
 839         int                     addr_num;
 840 #ifdef __KERNEL__
 841         struct sockaddr         __user *addrs;
 842 #else
 843         struct sockaddr         *addrs;
 844 #endif
 845 };
 846
 847 struct sctp_getaddrs {
 848         sctp_assoc_t            assoc_id; /*input*/
 849         __u32                   addr_num; /*output*/
 850         __u8                    addrs[0]; /*output, variable size*/
 851 };
 852
 853 /* A socket user request obtained via SCTP_GET_ASSOC_STATS that retrieves
 854  * association stats. All stats are counts except sas_maxrto and
 855  * sas_obs_rto_ipaddr. maxrto is the max observed rto + transport since
 856  * the last call. Will return 0 when RTO was not update since last call
 857  */
 858 struct sctp_assoc_stats {
 859         sctp_assoc_t    sas_assoc_id;    /* Input */
 860                                          /* Transport of observed max RTO */
 861         struct sockaddr_storage sas_obs_rto_ipaddr;
 862         __u64           sas_maxrto;      /* Maximum Observed RTO for period */
 863         __u64           sas_isacks;      /* SACKs received */
 864         __u64           sas_osacks;      /* SACKs sent */
 865         __u64           sas_opackets;    /* Packets sent */
 866         __u64           sas_ipackets;    /* Packets received */
 867         __u64           sas_rtxchunks;   /* Retransmitted Chunks */
 868         __u64           sas_outofseqtsns;/* TSN received > next expected */
 869         __u64           sas_idupchunks;  /* Dups received (ordered+unordered) */
 870         __u64           sas_gapcnt;      /* Gap Acknowledgements Received */
 871         __u64           sas_ouodchunks;  /* Unordered data chunks sent */
 872         __u64           sas_iuodchunks;  /* Unordered data chunks received */
 873         __u64           sas_oodchunks;   /* Ordered data chunks sent */
 874         __u64           sas_iodchunks;   /* Ordered data chunks received */
 875         __u64           sas_octrlchunks; /* Control chunks sent */
 876         __u64           sas_ictrlchunks; /* Control chunks received */
 877 };
 878
 879 /*
 880  * 8.1 sctp_bindx()
 881  *
 882  * The flags parameter is formed from the bitwise OR of zero or more of the
 883  * following currently defined flags:
 884  */
 885 #define SCTP_BINDX_ADD_ADDR 0x01
 886 #define SCTP_BINDX_REM_ADDR 0x02
 887
 888 /* This is the structure that is passed as an argument(optval) to
 889  * getsockopt(SCTP_SOCKOPT_PEELOFF).
 890  */
 891 typedef struct {
 892         sctp_assoc_t associd;
 893         int sd;
 894 } sctp_peeloff_arg_t;
 895
 896 /*
 897  *  Peer Address Thresholds socket option
 898  */
 899 struct sctp_paddrthlds {
 900         sctp_assoc_t spt_assoc_id;
 901         struct sockaddr_storage spt_address;
 902         __u16 spt_pathmaxrxt;
 903         __u16 spt_pathpfthld;
 904 };
 905
 906 #endif /* _UAPI_SCTP_H */