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