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