1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ 2 /* SCTP kernel implementation 3 * (C) Copyright IBM Corp. 2001, 2004 4 * Copyright (c) 1999-2000 Cisco, Inc. 5 * Copyright (c) 1999-2001 Motorola, Inc. 6 * Copyright (c) 2002 Intel Corp. 7 * 8 * This file is part of the SCTP kernel implementation 9 * 10 * This header represents the structures and constants needed to support 11 * the SCTP Extension to the Sockets API. 12 * 13 * This SCTP implementation is free software; 14 * you can redistribute it and/or modify it under the terms of 15 * the GNU General Public License as published by 16 * the Free Software Foundation; either version 2, or (at your option) 17 * any later version. 18 * 19 * This SCTP implementation is distributed in the hope that it 20 * will be useful, but WITHOUT ANY WARRANTY; without even the implied 21 * ************************ 22 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 23 * See the GNU General Public License for more details. 24 * 25 * You should have received a copy of the GNU General Public License 26 * along with GNU CC; see the file COPYING. If not, see 27 * <http://www.gnu.org/licenses/>. 28 * 29 * Please send any bug reports or fixes you make to the 30 * email address(es): 31 * lksctp developers <[email protected]> 32 * 33 * Or submit a bug report through the following website: 34 * http://www.sf.net/projects/lksctp 35 * 36 * Written or modified by: 37 * La Monte H.P. Yarroll <[email protected]> 38 * R. Stewart <[email protected]> 39 * K. Morneau <[email protected]> 40 * Q. Xie <[email protected]> 41 * Karl Knutson <[email protected]> 42 * Jon Grimm <[email protected]> 43 * Daisy Chang <[email protected]> 44 * Ryan Layer <[email protected]> 45 * Ardelle Fan <[email protected]> 46 * Sridhar Samudrala <[email protected]> 47 * Inaky Perez-Gonzalez <[email protected]> 48 * Vlad Yasevich <[email protected]> 49 * 50 * Any bugs reported given to us we will try to fix... any fixes shared will 51 * be incorporated into the next SCTP release. 52 */ 53 54 #ifndef _UAPI_SCTP_H 55 #define _UAPI_SCTP_H 56 57 #include <linux/types.h> 58 #include <linux/socket.h> 59 60 typedef __s32 sctp_assoc_t; 61 62 #define SCTP_FUTURE_ASSOC 0 63 #define SCTP_CURRENT_ASSOC 1 64 #define SCTP_ALL_ASSOC 2 65 66 /* The following symbols come from the Sockets API Extensions for 67 * SCTP <draft-ietf-tsvwg-sctpsocket-07.txt>. 68 */ 69 #define SCTP_RTOINFO 0 70 #define SCTP_ASSOCINFO 1 71 #define SCTP_INITMSG 2 72 #define SCTP_NODELAY 3 /* Get/set nodelay option. */ 73 #define SCTP_AUTOCLOSE 4 74 #define SCTP_SET_PEER_PRIMARY_ADDR 5 75 #define SCTP_PRIMARY_ADDR 6 76 #define SCTP_ADAPTATION_LAYER 7 77 #define SCTP_DISABLE_FRAGMENTS 8 78 #define SCTP_PEER_ADDR_PARAMS 9 79 #define SCTP_DEFAULT_SEND_PARAM 10 80 #define SCTP_EVENTS 11 81 #define SCTP_I_WANT_MAPPED_V4_ADDR 12 /* Turn on/off mapped v4 addresses */ 82 #define SCTP_MAXSEG 13 /* Get/set maximum fragment. */ 83 #define SCTP_STATUS 14 84 #define SCTP_GET_PEER_ADDR_INFO 15 85 #define SCTP_DELAYED_ACK_TIME 16 86 #define SCTP_DELAYED_ACK SCTP_DELAYED_ACK_TIME 87 #define SCTP_DELAYED_SACK SCTP_DELAYED_ACK_TIME 88 #define SCTP_CONTEXT 17 89 #define SCTP_FRAGMENT_INTERLEAVE 18 90 #define SCTP_PARTIAL_DELIVERY_POINT 19 /* Set/Get partial delivery point */ 91 #define SCTP_MAX_BURST 20 /* Set/Get max burst */ 92 #define SCTP_AUTH_CHUNK 21 /* Set only: add a chunk type to authenticate */ 93 #define SCTP_HMAC_IDENT 22 94 #define SCTP_AUTH_KEY 23 95 #define SCTP_AUTH_ACTIVE_KEY 24 96 #define SCTP_AUTH_DELETE_KEY 25 97 #define SCTP_PEER_AUTH_CHUNKS 26 /* Read only */ 98 #define SCTP_LOCAL_AUTH_CHUNKS 27 /* Read only */ 99 #define SCTP_GET_ASSOC_NUMBER 28 /* Read only */ 100 #define SCTP_GET_ASSOC_ID_LIST 29 /* Read only */ 101 #define SCTP_AUTO_ASCONF 30 102 #define SCTP_PEER_ADDR_THLDS 31 103 #define SCTP_RECVRCVINFO 32 104 #define SCTP_RECVNXTINFO 33 105 #define SCTP_DEFAULT_SNDINFO 34 106 #define SCTP_AUTH_DEACTIVATE_KEY 35 107 #define SCTP_REUSE_PORT 36 108 109 /* Internal Socket Options. Some of the sctp library functions are 110 * implemented using these socket options. 111 */ 112 #define SCTP_SOCKOPT_BINDX_ADD 100 /* BINDX requests for adding addrs */ 113 #define SCTP_SOCKOPT_BINDX_REM 101 /* BINDX requests for removing addrs. */ 114 #define SCTP_SOCKOPT_PEELOFF 102 /* peel off association. */ 115 /* Options 104-106 are deprecated and removed. Do not use this space */ 116 #define SCTP_SOCKOPT_CONNECTX_OLD 107 /* CONNECTX old requests. */ 117 #define SCTP_GET_PEER_ADDRS 108 /* Get all peer address. */ 118 #define SCTP_GET_LOCAL_ADDRS 109 /* Get all local address. */ 119 #define SCTP_SOCKOPT_CONNECTX 110 /* CONNECTX requests. */ 120 #define SCTP_SOCKOPT_CONNECTX3 111 /* CONNECTX requests (updated) */ 121 #define SCTP_GET_ASSOC_STATS 112 /* Read only */ 122 #define SCTP_PR_SUPPORTED 113 123 #define SCTP_DEFAULT_PRINFO 114 124 #define SCTP_PR_ASSOC_STATUS 115 125 #define SCTP_PR_STREAM_STATUS 116 126 #define SCTP_RECONFIG_SUPPORTED 117 127 #define SCTP_ENABLE_STREAM_RESET 118 128 #define SCTP_RESET_STREAMS 119 129 #define SCTP_RESET_ASSOC 120 130 #define SCTP_ADD_STREAMS 121 131 #define SCTP_SOCKOPT_PEELOFF_FLAGS 122 132 #define SCTP_STREAM_SCHEDULER 123 133 #define SCTP_STREAM_SCHEDULER_VALUE 124 134 #define SCTP_INTERLEAVING_SUPPORTED 125 135 #define SCTP_SENDMSG_CONNECT 126 136 #define SCTP_EVENT 127 137 #define SCTP_ASCONF_SUPPORTED 128 138 139 /* PR-SCTP policies */ 140 #define SCTP_PR_SCTP_NONE 0x0000 141 #define SCTP_PR_SCTP_TTL 0x0010 142 #define SCTP_PR_SCTP_RTX 0x0020 143 #define SCTP_PR_SCTP_PRIO 0x0030 144 #define SCTP_PR_SCTP_MAX SCTP_PR_SCTP_PRIO 145 #define SCTP_PR_SCTP_MASK 0x0030 146 147 #define __SCTP_PR_INDEX(x) ((x >> 4) - 1) 148 #define SCTP_PR_INDEX(x) __SCTP_PR_INDEX(SCTP_PR_SCTP_ ## x) 149 150 #define SCTP_PR_POLICY(x) ((x) & SCTP_PR_SCTP_MASK) 151 #define SCTP_PR_SET_POLICY(flags, x) \ 152 do { \ 153 flags &= ~SCTP_PR_SCTP_MASK; \ 154 flags |= x; \ 155 } while (0) 156 157 #define SCTP_PR_TTL_ENABLED(x) (SCTP_PR_POLICY(x) == SCTP_PR_SCTP_TTL) 158 #define SCTP_PR_RTX_ENABLED(x) (SCTP_PR_POLICY(x) == SCTP_PR_SCTP_RTX) 159 #define SCTP_PR_PRIO_ENABLED(x) (SCTP_PR_POLICY(x) == SCTP_PR_SCTP_PRIO) 160 161 /* For enable stream reset */ 162 #define SCTP_ENABLE_RESET_STREAM_REQ 0x01 163 #define SCTP_ENABLE_RESET_ASSOC_REQ 0x02 164 #define SCTP_ENABLE_CHANGE_ASSOC_REQ 0x04 165 #define SCTP_ENABLE_STRRESET_MASK 0x07 166 167 #define SCTP_STREAM_RESET_INCOMING 0x01 168 #define SCTP_STREAM_RESET_OUTGOING 0x02 169 170 /* These are bit fields for msghdr->msg_flags. See section 5.1. */ 171 /* On user space Linux, these live in <bits/socket.h> as an enum. */ 172 enum sctp_msg_flags { 173 MSG_NOTIFICATION = 0x8000, 174 #define MSG_NOTIFICATION MSG_NOTIFICATION 175 }; 176 177 /* 5.3.1 SCTP Initiation Structure (SCTP_INIT) 178 * 179 * This cmsghdr structure provides information for initializing new 180 * SCTP associations with sendmsg(). The SCTP_INITMSG socket option 181 * uses this same data structure. This structure is not used for 182 * recvmsg(). 183 * 184 * cmsg_level cmsg_type cmsg_data[] 185 * ------------ ------------ ---------------------- 186 * IPPROTO_SCTP SCTP_INIT struct sctp_initmsg 187 */ 188 struct sctp_initmsg { 189 __u16 sinit_num_ostreams; 190 __u16 sinit_max_instreams; 191 __u16 sinit_max_attempts; 192 __u16 sinit_max_init_timeo; 193 }; 194 195 /* 5.3.2 SCTP Header Information Structure (SCTP_SNDRCV) 196 * 197 * This cmsghdr structure specifies SCTP options for sendmsg() and 198 * describes SCTP header information about a received message through 199 * recvmsg(). 200 * 201 * cmsg_level cmsg_type cmsg_data[] 202 * ------------ ------------ ---------------------- 203 * IPPROTO_SCTP SCTP_SNDRCV struct sctp_sndrcvinfo 204 */ 205 struct sctp_sndrcvinfo { 206 __u16 sinfo_stream; 207 __u16 sinfo_ssn; 208 __u16 sinfo_flags; 209 __u32 sinfo_ppid; 210 __u32 sinfo_context; 211 __u32 sinfo_timetolive; 212 __u32 sinfo_tsn; 213 __u32 sinfo_cumtsn; 214 sctp_assoc_t sinfo_assoc_id; 215 }; 216 217 /* 5.3.4 SCTP Send Information Structure (SCTP_SNDINFO) 218 * 219 * This cmsghdr structure specifies SCTP options for sendmsg(). 220 * 221 * cmsg_level cmsg_type cmsg_data[] 222 * ------------ ------------ ------------------- 223 * IPPROTO_SCTP SCTP_SNDINFO struct sctp_sndinfo 224 */ 225 struct sctp_sndinfo { 226 __u16 snd_sid; 227 __u16 snd_flags; 228 __u32 snd_ppid; 229 __u32 snd_context; 230 sctp_assoc_t snd_assoc_id; 231 }; 232 233 /* 5.3.5 SCTP Receive Information Structure (SCTP_RCVINFO) 234 * 235 * This cmsghdr structure describes SCTP receive information 236 * about a received message through recvmsg(). 237 * 238 * cmsg_level cmsg_type cmsg_data[] 239 * ------------ ------------ ------------------- 240 * IPPROTO_SCTP SCTP_RCVINFO struct sctp_rcvinfo 241 */ 242 struct sctp_rcvinfo { 243 __u16 rcv_sid; 244 __u16 rcv_ssn; 245 __u16 rcv_flags; 246 __u32 rcv_ppid; 247 __u32 rcv_tsn; 248 __u32 rcv_cumtsn; 249 __u32 rcv_context; 250 sctp_assoc_t rcv_assoc_id; 251 }; 252 253 /* 5.3.6 SCTP Next Receive Information Structure (SCTP_NXTINFO) 254 * 255 * This cmsghdr structure describes SCTP receive information 256 * of the next message that will be delivered through recvmsg() 257 * if this information is already available when delivering 258 * the current message. 259 * 260 * cmsg_level cmsg_type cmsg_data[] 261 * ------------ ------------ ------------------- 262 * IPPROTO_SCTP SCTP_NXTINFO struct sctp_nxtinfo 263 */ 264 struct sctp_nxtinfo { 265 __u16 nxt_sid; 266 __u16 nxt_flags; 267 __u32 nxt_ppid; 268 __u32 nxt_length; 269 sctp_assoc_t nxt_assoc_id; 270 }; 271 272 /* 5.3.7 SCTP PR-SCTP Information Structure (SCTP_PRINFO) 273 * 274 * This cmsghdr structure specifies SCTP options for sendmsg(). 275 * 276 * cmsg_level cmsg_type cmsg_data[] 277 * ------------ ------------ ------------------- 278 * IPPROTO_SCTP SCTP_PRINFO struct sctp_prinfo 279 */ 280 struct sctp_prinfo { 281 __u16 pr_policy; 282 __u32 pr_value; 283 }; 284 285 /* 5.3.8 SCTP AUTH Information Structure (SCTP_AUTHINFO) 286 * 287 * This cmsghdr structure specifies SCTP options for sendmsg(). 288 * 289 * cmsg_level cmsg_type cmsg_data[] 290 * ------------ ------------ ------------------- 291 * IPPROTO_SCTP SCTP_AUTHINFO struct sctp_authinfo 292 */ 293 struct sctp_authinfo { 294 __u16 auth_keynumber; 295 }; 296 297 /* 298 * sinfo_flags: 16 bits (unsigned integer) 299 * 300 * This field may contain any of the following flags and is composed of 301 * a bitwise OR of these values. 302 */ 303 enum sctp_sinfo_flags { 304 SCTP_UNORDERED = (1 << 0), /* Send/receive message unordered. */ 305 SCTP_ADDR_OVER = (1 << 1), /* Override the primary destination. */ 306 SCTP_ABORT = (1 << 2), /* Send an ABORT message to the peer. */ 307 SCTP_SACK_IMMEDIATELY = (1 << 3), /* SACK should be sent without delay. */ 308 /* 2 bits here have been used by SCTP_PR_SCTP_MASK */ 309 SCTP_SENDALL = (1 << 6), 310 SCTP_PR_SCTP_ALL = (1 << 7), 311 SCTP_NOTIFICATION = MSG_NOTIFICATION, /* Next message is not user msg but notification. */ 312 SCTP_EOF = MSG_FIN, /* Initiate graceful shutdown process. */ 313 }; 314 315 typedef union { 316 __u8 raw; 317 struct sctp_initmsg init; 318 struct sctp_sndrcvinfo sndrcv; 319 } sctp_cmsg_data_t; 320 321 /* These are cmsg_types. */ 322 typedef enum sctp_cmsg_type { 323 SCTP_INIT, /* 5.2.1 SCTP Initiation Structure */ 324 #define SCTP_INIT SCTP_INIT 325 SCTP_SNDRCV, /* 5.2.2 SCTP Header Information Structure */ 326 #define SCTP_SNDRCV SCTP_SNDRCV 327 SCTP_SNDINFO, /* 5.3.4 SCTP Send Information Structure */ 328 #define SCTP_SNDINFO SCTP_SNDINFO 329 SCTP_RCVINFO, /* 5.3.5 SCTP Receive Information Structure */ 330 #define SCTP_RCVINFO SCTP_RCVINFO 331 SCTP_NXTINFO, /* 5.3.6 SCTP Next Receive Information Structure */ 332 #define SCTP_NXTINFO SCTP_NXTINFO 333 SCTP_PRINFO, /* 5.3.7 SCTP PR-SCTP Information Structure */ 334 #define SCTP_PRINFO SCTP_PRINFO 335 SCTP_AUTHINFO, /* 5.3.8 SCTP AUTH Information Structure */ 336 #define SCTP_AUTHINFO SCTP_AUTHINFO 337 SCTP_DSTADDRV4, /* 5.3.9 SCTP Destination IPv4 Address Structure */ 338 #define SCTP_DSTADDRV4 SCTP_DSTADDRV4 339 SCTP_DSTADDRV6, /* 5.3.10 SCTP Destination IPv6 Address Structure */ 340 #define SCTP_DSTADDRV6 SCTP_DSTADDRV6 341 } sctp_cmsg_t; 342 343 /* 344 * 5.3.1.1 SCTP_ASSOC_CHANGE 345 * 346 * Communication notifications inform the ULP that an SCTP association 347 * has either begun or ended. The identifier for a new association is 348 * provided by this notificaion. The notification information has the 349 * following format: 350 * 351 */ 352 struct sctp_assoc_change { 353 __u16 sac_type; 354 __u16 sac_flags; 355 __u32 sac_length; 356 __u16 sac_state; 357 __u16 sac_error; 358 __u16 sac_outbound_streams; 359 __u16 sac_inbound_streams; 360 sctp_assoc_t sac_assoc_id; 361 __u8 sac_info[0]; 362 }; 363 364 /* 365 * sac_state: 32 bits (signed integer) 366 * 367 * This field holds one of a number of values that communicate the 368 * event that happened to the association. They include: 369 * 370 * Note: The following state names deviate from the API draft as 371 * the names clash too easily with other kernel symbols. 372 */ 373 enum sctp_sac_state { 374 SCTP_COMM_UP, 375 SCTP_COMM_LOST, 376 SCTP_RESTART, 377 SCTP_SHUTDOWN_COMP, 378 SCTP_CANT_STR_ASSOC, 379 }; 380 381 /* 382 * 5.3.1.2 SCTP_PEER_ADDR_CHANGE 383 * 384 * When a destination address on a multi-homed peer encounters a change 385 * an interface details event is sent. The information has the 386 * following structure: 387 */ 388 struct sctp_paddr_change { 389 __u16 spc_type; 390 __u16 spc_flags; 391 __u32 spc_length; 392 struct sockaddr_storage spc_aaddr; 393 int spc_state; 394 int spc_error; 395 sctp_assoc_t spc_assoc_id; 396 } __attribute__((packed, aligned(4))); 397 398 /* 399 * spc_state: 32 bits (signed integer) 400 * 401 * This field holds one of a number of values that communicate the 402 * event that happened to the address. They include: 403 */ 404 enum sctp_spc_state { 405 SCTP_ADDR_AVAILABLE, 406 SCTP_ADDR_UNREACHABLE, 407 SCTP_ADDR_REMOVED, 408 SCTP_ADDR_ADDED, 409 SCTP_ADDR_MADE_PRIM, 410 SCTP_ADDR_CONFIRMED, 411 }; 412 413 414 /* 415 * 5.3.1.3 SCTP_REMOTE_ERROR 416 * 417 * A remote peer may send an Operational Error message to its peer. 418 * This message indicates a variety of error conditions on an 419 * association. The entire error TLV as it appears on the wire is 420 * included in a SCTP_REMOTE_ERROR event. Please refer to the SCTP 421 * specification [SCTP] and any extensions for a list of possible 422 * error formats. SCTP error TLVs have the format: 423 */ 424 struct sctp_remote_error { 425 __u16 sre_type; 426 __u16 sre_flags; 427 __u32 sre_length; 428 __be16 sre_error; 429 sctp_assoc_t sre_assoc_id; 430 __u8 sre_data[0]; 431 }; 432 433 434 /* 435 * 5.3.1.4 SCTP_SEND_FAILED 436 * 437 * If SCTP cannot deliver a message it may return the message as a 438 * notification. 439 */ 440 struct sctp_send_failed { 441 __u16 ssf_type; 442 __u16 ssf_flags; 443 __u32 ssf_length; 444 __u32 ssf_error; 445 struct sctp_sndrcvinfo ssf_info; 446 sctp_assoc_t ssf_assoc_id; 447 __u8 ssf_data[0]; 448 }; 449 450 /* 451 * ssf_flags: 16 bits (unsigned integer) 452 * 453 * The flag value will take one of the following values 454 * 455 * SCTP_DATA_UNSENT - Indicates that the data was never put on 456 * the wire. 457 * 458 * SCTP_DATA_SENT - Indicates that the data was put on the wire. 459 * Note that this does not necessarily mean that the 460 * data was (or was not) successfully delivered. 461 */ 462 enum sctp_ssf_flags { 463 SCTP_DATA_UNSENT, 464 SCTP_DATA_SENT, 465 }; 466 467 /* 468 * 5.3.1.5 SCTP_SHUTDOWN_EVENT 469 * 470 * When a peer sends a SHUTDOWN, SCTP delivers this notification to 471 * inform the application that it should cease sending data. 472 */ 473 struct sctp_shutdown_event { 474 __u16 sse_type; 475 __u16 sse_flags; 476 __u32 sse_length; 477 sctp_assoc_t sse_assoc_id; 478 }; 479 480 /* 481 * 5.3.1.6 SCTP_ADAPTATION_INDICATION 482 * 483 * When a peer sends a Adaptation Layer Indication parameter , SCTP 484 * delivers this notification to inform the application 485 * that of the peers requested adaptation layer. 486 */ 487 struct sctp_adaptation_event { 488 __u16 sai_type; 489 __u16 sai_flags; 490 __u32 sai_length; 491 __u32 sai_adaptation_ind; 492 sctp_assoc_t sai_assoc_id; 493 }; 494 495 /* 496 * 5.3.1.7 SCTP_PARTIAL_DELIVERY_EVENT 497 * 498 * When a receiver is engaged in a partial delivery of a 499 * message this notification will be used to indicate 500 * various events. 501 */ 502 struct sctp_pdapi_event { 503 __u16 pdapi_type; 504 __u16 pdapi_flags; 505 __u32 pdapi_length; 506 __u32 pdapi_indication; 507 sctp_assoc_t pdapi_assoc_id; 508 __u32 pdapi_stream; 509 __u32 pdapi_seq; 510 }; 511 512 enum { SCTP_PARTIAL_DELIVERY_ABORTED=0, }; 513 514 /* 515 * 5.3.1.8. SCTP_AUTHENTICATION_EVENT 516 * 517 * When a receiver is using authentication this message will provide 518 * notifications regarding new keys being made active as well as errors. 519 */ 520 struct sctp_authkey_event { 521 __u16 auth_type; 522 __u16 auth_flags; 523 __u32 auth_length; 524 __u16 auth_keynumber; 525 __u16 auth_altkeynumber; 526 __u32 auth_indication; 527 sctp_assoc_t auth_assoc_id; 528 }; 529 530 enum { 531 SCTP_AUTH_NEW_KEY, 532 #define SCTP_AUTH_NEWKEY SCTP_AUTH_NEW_KEY /* compatible with before */ 533 SCTP_AUTH_FREE_KEY, 534 SCTP_AUTH_NO_AUTH, 535 }; 536 537 /* 538 * 6.1.9. SCTP_SENDER_DRY_EVENT 539 * 540 * When the SCTP stack has no more user data to send or retransmit, this 541 * notification is given to the user. Also, at the time when a user app 542 * subscribes to this event, if there is no data to be sent or 543 * retransmit, the stack will immediately send up this notification. 544 */ 545 struct sctp_sender_dry_event { 546 __u16 sender_dry_type; 547 __u16 sender_dry_flags; 548 __u32 sender_dry_length; 549 sctp_assoc_t sender_dry_assoc_id; 550 }; 551 552 #define SCTP_STREAM_RESET_INCOMING_SSN 0x0001 553 #define SCTP_STREAM_RESET_OUTGOING_SSN 0x0002 554 #define SCTP_STREAM_RESET_DENIED 0x0004 555 #define SCTP_STREAM_RESET_FAILED 0x0008 556 struct sctp_stream_reset_event { 557 __u16 strreset_type; 558 __u16 strreset_flags; 559 __u32 strreset_length; 560 sctp_assoc_t strreset_assoc_id; 561 __u16 strreset_stream_list[]; 562 }; 563 564 #define SCTP_ASSOC_RESET_DENIED 0x0004 565 #define SCTP_ASSOC_RESET_FAILED 0x0008 566 struct sctp_assoc_reset_event { 567 __u16 assocreset_type; 568 __u16 assocreset_flags; 569 __u32 assocreset_length; 570 sctp_assoc_t assocreset_assoc_id; 571 __u32 assocreset_local_tsn; 572 __u32 assocreset_remote_tsn; 573 }; 574 575 #define SCTP_ASSOC_CHANGE_DENIED 0x0004 576 #define SCTP_ASSOC_CHANGE_FAILED 0x0008 577 #define SCTP_STREAM_CHANGE_DENIED SCTP_ASSOC_CHANGE_DENIED 578 #define SCTP_STREAM_CHANGE_FAILED SCTP_ASSOC_CHANGE_FAILED 579 struct sctp_stream_change_event { 580 __u16 strchange_type; 581 __u16 strchange_flags; 582 __u32 strchange_length; 583 sctp_assoc_t strchange_assoc_id; 584 __u16 strchange_instrms; 585 __u16 strchange_outstrms; 586 }; 587 588 /* 589 * Described in Section 7.3 590 * Ancillary Data and Notification Interest Options 591 */ 592 struct sctp_event_subscribe { 593 __u8 sctp_data_io_event; 594 __u8 sctp_association_event; 595 __u8 sctp_address_event; 596 __u8 sctp_send_failure_event; 597 __u8 sctp_peer_error_event; 598 __u8 sctp_shutdown_event; 599 __u8 sctp_partial_delivery_event; 600 __u8 sctp_adaptation_layer_event; 601 __u8 sctp_authentication_event; 602 __u8 sctp_sender_dry_event; 603 __u8 sctp_stream_reset_event; 604 __u8 sctp_assoc_reset_event; 605 __u8 sctp_stream_change_event; 606 }; 607 608 /* 609 * 5.3.1 SCTP Notification Structure 610 * 611 * The notification structure is defined as the union of all 612 * notification types. 613 * 614 */ 615 union sctp_notification { 616 struct { 617 __u16 sn_type; /* Notification type. */ 618 __u16 sn_flags; 619 __u32 sn_length; 620 } sn_header; 621 struct sctp_assoc_change sn_assoc_change; 622 struct sctp_paddr_change sn_paddr_change; 623 struct sctp_remote_error sn_remote_error; 624 struct sctp_send_failed sn_send_failed; 625 struct sctp_shutdown_event sn_shutdown_event; 626 struct sctp_adaptation_event sn_adaptation_event; 627 struct sctp_pdapi_event sn_pdapi_event; 628 struct sctp_authkey_event sn_authkey_event; 629 struct sctp_sender_dry_event sn_sender_dry_event; 630 struct sctp_stream_reset_event sn_strreset_event; 631 struct sctp_assoc_reset_event sn_assocreset_event; 632 struct sctp_stream_change_event sn_strchange_event; 633 }; 634 635 /* Section 5.3.1 636 * All standard values for sn_type flags are greater than 2^15. 637 * Values from 2^15 and down are reserved. 638 */ 639 640 enum sctp_sn_type { 641 SCTP_SN_TYPE_BASE = (1<<15), 642 SCTP_DATA_IO_EVENT = SCTP_SN_TYPE_BASE, 643 #define SCTP_DATA_IO_EVENT SCTP_DATA_IO_EVENT 644 SCTP_ASSOC_CHANGE, 645 #define SCTP_ASSOC_CHANGE SCTP_ASSOC_CHANGE 646 SCTP_PEER_ADDR_CHANGE, 647 #define SCTP_PEER_ADDR_CHANGE SCTP_PEER_ADDR_CHANGE 648 SCTP_SEND_FAILED, 649 #define SCTP_SEND_FAILED SCTP_SEND_FAILED 650 SCTP_REMOTE_ERROR, 651 #define SCTP_REMOTE_ERROR SCTP_REMOTE_ERROR 652 SCTP_SHUTDOWN_EVENT, 653 #define SCTP_SHUTDOWN_EVENT SCTP_SHUTDOWN_EVENT 654 SCTP_PARTIAL_DELIVERY_EVENT, 655 #define SCTP_PARTIAL_DELIVERY_EVENT SCTP_PARTIAL_DELIVERY_EVENT 656 SCTP_ADAPTATION_INDICATION, 657 #define SCTP_ADAPTATION_INDICATION SCTP_ADAPTATION_INDICATION 658 SCTP_AUTHENTICATION_EVENT, 659 #define SCTP_AUTHENTICATION_INDICATION SCTP_AUTHENTICATION_EVENT 660 SCTP_SENDER_DRY_EVENT, 661 #define SCTP_SENDER_DRY_EVENT SCTP_SENDER_DRY_EVENT 662 SCTP_STREAM_RESET_EVENT, 663 #define SCTP_STREAM_RESET_EVENT SCTP_STREAM_RESET_EVENT 664 SCTP_ASSOC_RESET_EVENT, 665 #define SCTP_ASSOC_RESET_EVENT SCTP_ASSOC_RESET_EVENT 666 SCTP_STREAM_CHANGE_EVENT, 667 #define SCTP_STREAM_CHANGE_EVENT SCTP_STREAM_CHANGE_EVENT 668 SCTP_SN_TYPE_MAX = SCTP_STREAM_CHANGE_EVENT, 669 #define SCTP_SN_TYPE_MAX SCTP_SN_TYPE_MAX 670 }; 671 672 /* Notification error codes used to fill up the error fields in some 673 * notifications. 674 * SCTP_PEER_ADDRESS_CHAGE : spc_error 675 * SCTP_ASSOC_CHANGE : sac_error 676 * These names should be potentially included in the draft 04 of the SCTP 677 * sockets API specification. 678 */ 679 typedef enum sctp_sn_error { 680 SCTP_FAILED_THRESHOLD, 681 SCTP_RECEIVED_SACK, 682 SCTP_HEARTBEAT_SUCCESS, 683 SCTP_RESPONSE_TO_USER_REQ, 684 SCTP_INTERNAL_ERROR, 685 SCTP_SHUTDOWN_GUARD_EXPIRES, 686 SCTP_PEER_FAULTY, 687 } sctp_sn_error_t; 688 689 /* 690 * 7.1.1 Retransmission Timeout Parameters (SCTP_RTOINFO) 691 * 692 * The protocol parameters used to initialize and bound retransmission 693 * timeout (RTO) are tunable. See [SCTP] for more information on how 694 * these parameters are used in RTO calculation. 695 */ 696 struct sctp_rtoinfo { 697 sctp_assoc_t srto_assoc_id; 698 __u32 srto_initial; 699 __u32 srto_max; 700 __u32 srto_min; 701 }; 702 703 /* 704 * 7.1.2 Association Parameters (SCTP_ASSOCINFO) 705 * 706 * This option is used to both examine and set various association and 707 * endpoint parameters. 708 */ 709 struct sctp_assocparams { 710 sctp_assoc_t sasoc_assoc_id; 711 __u16 sasoc_asocmaxrxt; 712 __u16 sasoc_number_peer_destinations; 713 __u32 sasoc_peer_rwnd; 714 __u32 sasoc_local_rwnd; 715 __u32 sasoc_cookie_life; 716 }; 717 718 /* 719 * 7.1.9 Set Peer Primary Address (SCTP_SET_PEER_PRIMARY_ADDR) 720 * 721 * Requests that the peer mark the enclosed address as the association 722 * primary. The enclosed address must be one of the association's 723 * locally bound addresses. The following structure is used to make a 724 * set primary request: 725 */ 726 struct sctp_setpeerprim { 727 sctp_assoc_t sspp_assoc_id; 728 struct sockaddr_storage sspp_addr; 729 } __attribute__((packed, aligned(4))); 730 731 /* 732 * 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR) 733 * 734 * Requests that the local SCTP stack use the enclosed peer address as 735 * the association primary. The enclosed address must be one of the 736 * association peer's addresses. The following structure is used to 737 * make a set peer primary request: 738 */ 739 struct sctp_prim { 740 sctp_assoc_t ssp_assoc_id; 741 struct sockaddr_storage ssp_addr; 742 } __attribute__((packed, aligned(4))); 743 744 /* For backward compatibility use, define the old name too */ 745 #define sctp_setprim sctp_prim 746 747 /* 748 * 7.1.11 Set Adaptation Layer Indicator (SCTP_ADAPTATION_LAYER) 749 * 750 * Requests that the local endpoint set the specified Adaptation Layer 751 * Indication parameter for all future INIT and INIT-ACK exchanges. 752 */ 753 struct sctp_setadaptation { 754 __u32 ssb_adaptation_ind; 755 }; 756 757 /* 758 * 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS) 759 * 760 * Applications can enable or disable heartbeats for any peer address 761 * of an association, modify an address's heartbeat interval, force a 762 * heartbeat to be sent immediately, and adjust the address's maximum 763 * number of retransmissions sent before an address is considered 764 * unreachable. The following structure is used to access and modify an 765 * address's parameters: 766 */ 767 enum sctp_spp_flags { 768 SPP_HB_ENABLE = 1<<0, /*Enable heartbeats*/ 769 SPP_HB_DISABLE = 1<<1, /*Disable heartbeats*/ 770 SPP_HB = SPP_HB_ENABLE | SPP_HB_DISABLE, 771 SPP_HB_DEMAND = 1<<2, /*Send heartbeat immediately*/ 772 SPP_PMTUD_ENABLE = 1<<3, /*Enable PMTU discovery*/ 773 SPP_PMTUD_DISABLE = 1<<4, /*Disable PMTU discovery*/ 774 SPP_PMTUD = SPP_PMTUD_ENABLE | SPP_PMTUD_DISABLE, 775 SPP_SACKDELAY_ENABLE = 1<<5, /*Enable SACK*/ 776 SPP_SACKDELAY_DISABLE = 1<<6, /*Disable SACK*/ 777 SPP_SACKDELAY = SPP_SACKDELAY_ENABLE | SPP_SACKDELAY_DISABLE, 778 SPP_HB_TIME_IS_ZERO = 1<<7, /* Set HB delay to 0 */ 779 SPP_IPV6_FLOWLABEL = 1<<8, 780 SPP_DSCP = 1<<9, 781 }; 782 783 struct sctp_paddrparams { 784 sctp_assoc_t spp_assoc_id; 785 struct sockaddr_storage spp_address; 786 __u32 spp_hbinterval; 787 __u16 spp_pathmaxrxt; 788 __u32 spp_pathmtu; 789 __u32 spp_sackdelay; 790 __u32 spp_flags; 791 __u32 spp_ipv6_flowlabel; 792 __u8 spp_dscp; 793 } __attribute__((packed, aligned(4))); 794 795 /* 796 * 7.1.18. Add a chunk that must be authenticated (SCTP_AUTH_CHUNK) 797 * 798 * This set option adds a chunk type that the user is requesting to be 799 * received only in an authenticated way. Changes to the list of chunks 800 * will only effect future associations on the socket. 801 */ 802 struct sctp_authchunk { 803 __u8 sauth_chunk; 804 }; 805 806 /* 807 * 7.1.19. Get or set the list of supported HMAC Identifiers (SCTP_HMAC_IDENT) 808 * 809 * This option gets or sets the list of HMAC algorithms that the local 810 * endpoint requires the peer to use. 811 */ 812 #ifndef __KERNEL__ 813 /* This here is only used by user space as is. It might not be a good idea 814 * to export/reveal the whole structure with reserved fields etc. 815 */ 816 enum { 817 SCTP_AUTH_HMAC_ID_SHA1 = 1, 818 SCTP_AUTH_HMAC_ID_SHA256 = 3, 819 }; 820 #endif 821 822 struct sctp_hmacalgo { 823 __u32 shmac_num_idents; 824 __u16 shmac_idents[]; 825 }; 826 827 /* Sadly, user and kernel space have different names for 828 * this structure member, so this is to not break anything. 829 */ 830 #define shmac_number_of_idents shmac_num_idents 831 832 /* 833 * 7.1.20. Set a shared key (SCTP_AUTH_KEY) 834 * 835 * This option will set a shared secret key which is used to build an 836 * association shared key. 837 */ 838 struct sctp_authkey { 839 sctp_assoc_t sca_assoc_id; 840 __u16 sca_keynumber; 841 __u16 sca_keylength; 842 __u8 sca_key[]; 843 }; 844 845 /* 846 * 7.1.21. Get or set the active shared key (SCTP_AUTH_ACTIVE_KEY) 847 * 848 * This option will get or set the active shared key to be used to build 849 * the association shared key. 850 */ 851 852 struct sctp_authkeyid { 853 sctp_assoc_t scact_assoc_id; 854 __u16 scact_keynumber; 855 }; 856 857 858 /* 859 * 7.1.23. Get or set delayed ack timer (SCTP_DELAYED_SACK) 860 * 861 * This option will effect the way delayed acks are performed. This 862 * option allows you to get or set the delayed ack time, in 863 * milliseconds. It also allows changing the delayed ack frequency. 864 * Changing the frequency to 1 disables the delayed sack algorithm. If 865 * the assoc_id is 0, then this sets or gets the endpoints default 866 * values. If the assoc_id field is non-zero, then the set or get 867 * effects the specified association for the one to many model (the 868 * assoc_id field is ignored by the one to one model). Note that if 869 * sack_delay or sack_freq are 0 when setting this option, then the 870 * current values will remain unchanged. 871 */ 872 struct sctp_sack_info { 873 sctp_assoc_t sack_assoc_id; 874 uint32_t sack_delay; 875 uint32_t sack_freq; 876 }; 877 878 struct sctp_assoc_value { 879 sctp_assoc_t assoc_id; 880 uint32_t assoc_value; 881 }; 882 883 struct sctp_stream_value { 884 sctp_assoc_t assoc_id; 885 uint16_t stream_id; 886 uint16_t stream_value; 887 }; 888 889 /* 890 * 7.2.2 Peer Address Information 891 * 892 * Applications can retrieve information about a specific peer address 893 * of an association, including its reachability state, congestion 894 * window, and retransmission timer values. This information is 895 * read-only. The following structure is used to access this 896 * information: 897 */ 898 struct sctp_paddrinfo { 899 sctp_assoc_t spinfo_assoc_id; 900 struct sockaddr_storage spinfo_address; 901 __s32 spinfo_state; 902 __u32 spinfo_cwnd; 903 __u32 spinfo_srtt; 904 __u32 spinfo_rto; 905 __u32 spinfo_mtu; 906 } __attribute__((packed, aligned(4))); 907 908 /* Peer addresses's state. */ 909 /* UNKNOWN: Peer address passed by the upper layer in sendmsg or connect[x] 910 * calls. 911 * UNCONFIRMED: Peer address received in INIT/INIT-ACK address parameters. 912 * Not yet confirmed by a heartbeat and not available for data 913 * transfers. 914 * ACTIVE : Peer address confirmed, active and available for data transfers. 915 * INACTIVE: Peer address inactive and not available for data transfers. 916 */ 917 enum sctp_spinfo_state { 918 SCTP_INACTIVE, 919 SCTP_PF, 920 SCTP_ACTIVE, 921 SCTP_UNCONFIRMED, 922 SCTP_UNKNOWN = 0xffff /* Value used for transport state unknown */ 923 }; 924 925 /* 926 * 7.2.1 Association Status (SCTP_STATUS) 927 * 928 * Applications can retrieve current status information about an 929 * association, including association state, peer receiver window size, 930 * number of unacked data chunks, and number of data chunks pending 931 * receipt. This information is read-only. The following structure is 932 * used to access this information: 933 */ 934 struct sctp_status { 935 sctp_assoc_t sstat_assoc_id; 936 __s32 sstat_state; 937 __u32 sstat_rwnd; 938 __u16 sstat_unackdata; 939 __u16 sstat_penddata; 940 __u16 sstat_instrms; 941 __u16 sstat_outstrms; 942 __u32 sstat_fragmentation_point; 943 struct sctp_paddrinfo sstat_primary; 944 }; 945 946 /* 947 * 7.2.3. Get the list of chunks the peer requires to be authenticated 948 * (SCTP_PEER_AUTH_CHUNKS) 949 * 950 * This option gets a list of chunks for a specified association that 951 * the peer requires to be received authenticated only. 952 */ 953 struct sctp_authchunks { 954 sctp_assoc_t gauth_assoc_id; 955 __u32 gauth_number_of_chunks; 956 uint8_t gauth_chunks[]; 957 }; 958 959 /* The broken spelling has been released already in lksctp-tools header, 960 * so don't break anyone, now that it's fixed. 961 */ 962 #define guth_number_of_chunks gauth_number_of_chunks 963 964 /* Association states. */ 965 enum sctp_sstat_state { 966 SCTP_EMPTY = 0, 967 SCTP_CLOSED = 1, 968 SCTP_COOKIE_WAIT = 2, 969 SCTP_COOKIE_ECHOED = 3, 970 SCTP_ESTABLISHED = 4, 971 SCTP_SHUTDOWN_PENDING = 5, 972 SCTP_SHUTDOWN_SENT = 6, 973 SCTP_SHUTDOWN_RECEIVED = 7, 974 SCTP_SHUTDOWN_ACK_SENT = 8, 975 }; 976 977 /* 978 * 8.2.6. Get the Current Identifiers of Associations 979 * (SCTP_GET_ASSOC_ID_LIST) 980 * 981 * This option gets the current list of SCTP association identifiers of 982 * the SCTP associations handled by a one-to-many style socket. 983 */ 984 struct sctp_assoc_ids { 985 __u32 gaids_number_of_ids; 986 sctp_assoc_t gaids_assoc_id[]; 987 }; 988 989 /* 990 * 8.3, 8.5 get all peer/local addresses in an association. 991 * This parameter struct is used by SCTP_GET_PEER_ADDRS and 992 * SCTP_GET_LOCAL_ADDRS socket options used internally to implement 993 * sctp_getpaddrs() and sctp_getladdrs() API. 994 */ 995 struct sctp_getaddrs_old { 996 sctp_assoc_t assoc_id; 997 int addr_num; 998 #ifdef __KERNEL__ 999 struct sockaddr __user *addrs; 1000 #else 1001 struct sockaddr *addrs; 1002 #endif 1003 }; 1004 1005 struct sctp_getaddrs { 1006 sctp_assoc_t assoc_id; /*input*/ 1007 __u32 addr_num; /*output*/ 1008 __u8 addrs[0]; /*output, variable size*/ 1009 }; 1010 1011 /* A socket user request obtained via SCTP_GET_ASSOC_STATS that retrieves 1012 * association stats. All stats are counts except sas_maxrto and 1013 * sas_obs_rto_ipaddr. maxrto is the max observed rto + transport since 1014 * the last call. Will return 0 when RTO was not update since last call 1015 */ 1016 struct sctp_assoc_stats { 1017 sctp_assoc_t sas_assoc_id; /* Input */ 1018 /* Transport of observed max RTO */ 1019 struct sockaddr_storage sas_obs_rto_ipaddr; 1020 __u64 sas_maxrto; /* Maximum Observed RTO for period */ 1021 __u64 sas_isacks; /* SACKs received */ 1022 __u64 sas_osacks; /* SACKs sent */ 1023 __u64 sas_opackets; /* Packets sent */ 1024 __u64 sas_ipackets; /* Packets received */ 1025 __u64 sas_rtxchunks; /* Retransmitted Chunks */ 1026 __u64 sas_outofseqtsns;/* TSN received > next expected */ 1027 __u64 sas_idupchunks; /* Dups received (ordered+unordered) */ 1028 __u64 sas_gapcnt; /* Gap Acknowledgements Received */ 1029 __u64 sas_ouodchunks; /* Unordered data chunks sent */ 1030 __u64 sas_iuodchunks; /* Unordered data chunks received */ 1031 __u64 sas_oodchunks; /* Ordered data chunks sent */ 1032 __u64 sas_iodchunks; /* Ordered data chunks received */ 1033 __u64 sas_octrlchunks; /* Control chunks sent */ 1034 __u64 sas_ictrlchunks; /* Control chunks received */ 1035 }; 1036 1037 /* 1038 * 8.1 sctp_bindx() 1039 * 1040 * The flags parameter is formed from the bitwise OR of zero or more of the 1041 * following currently defined flags: 1042 */ 1043 #define SCTP_BINDX_ADD_ADDR 0x01 1044 #define SCTP_BINDX_REM_ADDR 0x02 1045 1046 /* This is the structure that is passed as an argument(optval) to 1047 * getsockopt(SCTP_SOCKOPT_PEELOFF). 1048 */ 1049 typedef struct { 1050 sctp_assoc_t associd; 1051 int sd; 1052 } sctp_peeloff_arg_t; 1053 1054 typedef struct { 1055 sctp_peeloff_arg_t p_arg; 1056 unsigned flags; 1057 } sctp_peeloff_flags_arg_t; 1058 1059 /* 1060 * Peer Address Thresholds socket option 1061 */ 1062 struct sctp_paddrthlds { 1063 sctp_assoc_t spt_assoc_id; 1064 struct sockaddr_storage spt_address; 1065 __u16 spt_pathmaxrxt; 1066 __u16 spt_pathpfthld; 1067 }; 1068 1069 /* 1070 * Socket Option for Getting the Association/Stream-Specific PR-SCTP Status 1071 */ 1072 struct sctp_prstatus { 1073 sctp_assoc_t sprstat_assoc_id; 1074 __u16 sprstat_sid; 1075 __u16 sprstat_policy; 1076 __u64 sprstat_abandoned_unsent; 1077 __u64 sprstat_abandoned_sent; 1078 }; 1079 1080 struct sctp_default_prinfo { 1081 sctp_assoc_t pr_assoc_id; 1082 __u32 pr_value; 1083 __u16 pr_policy; 1084 }; 1085 1086 struct sctp_info { 1087 __u32 sctpi_tag; 1088 __u32 sctpi_state; 1089 __u32 sctpi_rwnd; 1090 __u16 sctpi_unackdata; 1091 __u16 sctpi_penddata; 1092 __u16 sctpi_instrms; 1093 __u16 sctpi_outstrms; 1094 __u32 sctpi_fragmentation_point; 1095 __u32 sctpi_inqueue; 1096 __u32 sctpi_outqueue; 1097 __u32 sctpi_overall_error; 1098 __u32 sctpi_max_burst; 1099 __u32 sctpi_maxseg; 1100 __u32 sctpi_peer_rwnd; 1101 __u32 sctpi_peer_tag; 1102 __u8 sctpi_peer_capable; 1103 __u8 sctpi_peer_sack; 1104 __u16 __reserved1; 1105 1106 /* assoc status info */ 1107 __u64 sctpi_isacks; 1108 __u64 sctpi_osacks; 1109 __u64 sctpi_opackets; 1110 __u64 sctpi_ipackets; 1111 __u64 sctpi_rtxchunks; 1112 __u64 sctpi_outofseqtsns; 1113 __u64 sctpi_idupchunks; 1114 __u64 sctpi_gapcnt; 1115 __u64 sctpi_ouodchunks; 1116 __u64 sctpi_iuodchunks; 1117 __u64 sctpi_oodchunks; 1118 __u64 sctpi_iodchunks; 1119 __u64 sctpi_octrlchunks; 1120 __u64 sctpi_ictrlchunks; 1121 1122 /* primary transport info */ 1123 struct sockaddr_storage sctpi_p_address; 1124 __s32 sctpi_p_state; 1125 __u32 sctpi_p_cwnd; 1126 __u32 sctpi_p_srtt; 1127 __u32 sctpi_p_rto; 1128 __u32 sctpi_p_hbinterval; 1129 __u32 sctpi_p_pathmaxrxt; 1130 __u32 sctpi_p_sackdelay; 1131 __u32 sctpi_p_sackfreq; 1132 __u32 sctpi_p_ssthresh; 1133 __u32 sctpi_p_partial_bytes_acked; 1134 __u32 sctpi_p_flight_size; 1135 __u16 sctpi_p_error; 1136 __u16 __reserved2; 1137 1138 /* sctp sock info */ 1139 __u32 sctpi_s_autoclose; 1140 __u32 sctpi_s_adaptation_ind; 1141 __u32 sctpi_s_pd_point; 1142 __u8 sctpi_s_nodelay; 1143 __u8 sctpi_s_disable_fragments; 1144 __u8 sctpi_s_v4mapped; 1145 __u8 sctpi_s_frag_interleave; 1146 __u32 sctpi_s_type; 1147 __u32 __reserved3; 1148 }; 1149 1150 struct sctp_reset_streams { 1151 sctp_assoc_t srs_assoc_id; 1152 uint16_t srs_flags; 1153 uint16_t srs_number_streams; /* 0 == ALL */ 1154 uint16_t srs_stream_list[]; /* list if srs_num_streams is not 0 */ 1155 }; 1156 1157 struct sctp_add_streams { 1158 sctp_assoc_t sas_assoc_id; 1159 uint16_t sas_instrms; 1160 uint16_t sas_outstrms; 1161 }; 1162 1163 struct sctp_event { 1164 sctp_assoc_t se_assoc_id; 1165 uint16_t se_type; 1166 uint8_t se_on; 1167 }; 1168 1169 /* SCTP Stream schedulers */ 1170 enum sctp_sched_type { 1171 SCTP_SS_FCFS, 1172 SCTP_SS_DEFAULT = SCTP_SS_FCFS, 1173 SCTP_SS_PRIO, 1174 SCTP_SS_RR, 1175 SCTP_SS_MAX = SCTP_SS_RR 1176 }; 1177 1178 #endif /* _UAPI_SCTP_H */ 1179