sctp.h (36016B) - Raw
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 <linux-sctp@vger.kernel.org> 32 * 33 * Or submit a bug report through the following website: 34 * http://www.sf.net/projects/lksctp 35 * 36 * Written or modified by: 37 * La Monte H.P. Yarroll <piggy@acm.org> 38 * R. Stewart <randall@sctp.chicago.il.us> 39 * K. Morneau <kmorneau@cisco.com> 40 * Q. Xie <qxie1@email.mot.com> 41 * Karl Knutson <karl@athena.chicago.il.us> 42 * Jon Grimm <jgrimm@us.ibm.com> 43 * Daisy Chang <daisyc@us.ibm.com> 44 * Ryan Layer <rmlayer@us.ibm.com> 45 * Ardelle Fan <ardelle.fan@intel.com> 46 * Sridhar Samudrala <sri@us.ibm.com> 47 * Inaky Perez-Gonzalez <inaky.gonzalez@intel.com> 48 * Vlad Yasevich <vladislav.yasevich@hp.com> 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 _SCTP_H 55 #define _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 #define SCTP_PEER_ADDR_THLDS_V2 37 109 110 /* Internal Socket Options. Some of the sctp library functions are 111 * implemented using these socket options. 112 */ 113 #define SCTP_SOCKOPT_BINDX_ADD 100 /* BINDX requests for adding addrs */ 114 #define SCTP_SOCKOPT_BINDX_REM 101 /* BINDX requests for removing addrs. */ 115 #define SCTP_SOCKOPT_PEELOFF 102 /* peel off association. */ 116 /* Options 104-106 are deprecated and removed. Do not use this space */ 117 #define SCTP_SOCKOPT_CONNECTX_OLD 107 /* CONNECTX old requests. */ 118 #define SCTP_GET_PEER_ADDRS 108 /* Get all peer address. */ 119 #define SCTP_GET_LOCAL_ADDRS 109 /* Get all local address. */ 120 #define SCTP_SOCKOPT_CONNECTX 110 /* CONNECTX requests. */ 121 #define SCTP_SOCKOPT_CONNECTX3 111 /* CONNECTX requests (updated) */ 122 #define SCTP_GET_ASSOC_STATS 112 /* Read only */ 123 #define SCTP_PR_SUPPORTED 113 124 #define SCTP_DEFAULT_PRINFO 114 125 #define SCTP_PR_ASSOC_STATUS 115 126 #define SCTP_PR_STREAM_STATUS 116 127 #define SCTP_RECONFIG_SUPPORTED 117 128 #define SCTP_ENABLE_STREAM_RESET 118 129 #define SCTP_RESET_STREAMS 119 130 #define SCTP_RESET_ASSOC 120 131 #define SCTP_ADD_STREAMS 121 132 #define SCTP_SOCKOPT_PEELOFF_FLAGS 122 133 #define SCTP_STREAM_SCHEDULER 123 134 #define SCTP_STREAM_SCHEDULER_VALUE 124 135 #define SCTP_INTERLEAVING_SUPPORTED 125 136 #define SCTP_SENDMSG_CONNECT 126 137 #define SCTP_EVENT 127 138 #define SCTP_ASCONF_SUPPORTED 128 139 #define SCTP_AUTH_SUPPORTED 129 140 #define SCTP_ECN_SUPPORTED 130 141 #define SCTP_EXPOSE_POTENTIALLY_FAILED_STATE 131 142 #define SCTP_EXPOSE_PF_STATE SCTP_EXPOSE_POTENTIALLY_FAILED_STATE 143 #define SCTP_REMOTE_UDP_ENCAPS_PORT 132 144 #define SCTP_PLPMTUD_PROBE_INTERVAL 133 145 146 /* PR-SCTP policies */ 147 #define SCTP_PR_SCTP_NONE 0x0000 148 #define SCTP_PR_SCTP_TTL 0x0010 149 #define SCTP_PR_SCTP_RTX 0x0020 150 #define SCTP_PR_SCTP_PRIO 0x0030 151 #define SCTP_PR_SCTP_MAX SCTP_PR_SCTP_PRIO 152 #define SCTP_PR_SCTP_MASK 0x0030 153 154 #define __SCTP_PR_INDEX(x) ((x >> 4) - 1) 155 #define SCTP_PR_INDEX(x) __SCTP_PR_INDEX(SCTP_PR_SCTP_ ## x) 156 157 #define SCTP_PR_POLICY(x) ((x) & SCTP_PR_SCTP_MASK) 158 #define SCTP_PR_SET_POLICY(flags, x) \ 159 do { \ 160 flags &= ~SCTP_PR_SCTP_MASK; \ 161 flags |= x; \ 162 } while (0) 163 164 #define SCTP_PR_TTL_ENABLED(x) (SCTP_PR_POLICY(x) == SCTP_PR_SCTP_TTL) 165 #define SCTP_PR_RTX_ENABLED(x) (SCTP_PR_POLICY(x) == SCTP_PR_SCTP_RTX) 166 #define SCTP_PR_PRIO_ENABLED(x) (SCTP_PR_POLICY(x) == SCTP_PR_SCTP_PRIO) 167 168 /* For enable stream reset */ 169 #define SCTP_ENABLE_RESET_STREAM_REQ 0x01 170 #define SCTP_ENABLE_RESET_ASSOC_REQ 0x02 171 #define SCTP_ENABLE_CHANGE_ASSOC_REQ 0x04 172 #define SCTP_ENABLE_STRRESET_MASK 0x07 173 174 #define SCTP_STREAM_RESET_INCOMING 0x01 175 #define SCTP_STREAM_RESET_OUTGOING 0x02 176 177 /* These are bit fields for msghdr->msg_flags. See section 5.1. */ 178 /* On user space Linux, these live in <bits/socket.h> as an enum. */ 179 enum sctp_msg_flags { 180 MSG_NOTIFICATION = 0x8000, 181 #define MSG_NOTIFICATION MSG_NOTIFICATION 182 }; 183 184 /* 5.3.1 SCTP Initiation Structure (SCTP_INIT) 185 * 186 * This cmsghdr structure provides information for initializing new 187 * SCTP associations with sendmsg(). The SCTP_INITMSG socket option 188 * uses this same data structure. This structure is not used for 189 * recvmsg(). 190 * 191 * cmsg_level cmsg_type cmsg_data[] 192 * ------------ ------------ ---------------------- 193 * IPPROTO_SCTP SCTP_INIT struct sctp_initmsg 194 */ 195 struct sctp_initmsg { 196 __u16 sinit_num_ostreams; 197 __u16 sinit_max_instreams; 198 __u16 sinit_max_attempts; 199 __u16 sinit_max_init_timeo; 200 }; 201 202 /* 5.3.2 SCTP Header Information Structure (SCTP_SNDRCV) 203 * 204 * This cmsghdr structure specifies SCTP options for sendmsg() and 205 * describes SCTP header information about a received message through 206 * recvmsg(). 207 * 208 * cmsg_level cmsg_type cmsg_data[] 209 * ------------ ------------ ---------------------- 210 * IPPROTO_SCTP SCTP_SNDRCV struct sctp_sndrcvinfo 211 */ 212 struct sctp_sndrcvinfo { 213 __u16 sinfo_stream; 214 __u16 sinfo_ssn; 215 __u16 sinfo_flags; 216 __u32 sinfo_ppid; 217 __u32 sinfo_context; 218 __u32 sinfo_timetolive; 219 __u32 sinfo_tsn; 220 __u32 sinfo_cumtsn; 221 sctp_assoc_t sinfo_assoc_id; 222 }; 223 224 /* 5.3.4 SCTP Send Information Structure (SCTP_SNDINFO) 225 * 226 * This cmsghdr structure specifies SCTP options for sendmsg(). 227 * 228 * cmsg_level cmsg_type cmsg_data[] 229 * ------------ ------------ ------------------- 230 * IPPROTO_SCTP SCTP_SNDINFO struct sctp_sndinfo 231 */ 232 struct sctp_sndinfo { 233 __u16 snd_sid; 234 __u16 snd_flags; 235 __u32 snd_ppid; 236 __u32 snd_context; 237 sctp_assoc_t snd_assoc_id; 238 }; 239 240 /* 5.3.5 SCTP Receive Information Structure (SCTP_RCVINFO) 241 * 242 * This cmsghdr structure describes SCTP receive information 243 * about a received message through recvmsg(). 244 * 245 * cmsg_level cmsg_type cmsg_data[] 246 * ------------ ------------ ------------------- 247 * IPPROTO_SCTP SCTP_RCVINFO struct sctp_rcvinfo 248 */ 249 struct sctp_rcvinfo { 250 __u16 rcv_sid; 251 __u16 rcv_ssn; 252 __u16 rcv_flags; 253 __u32 rcv_ppid; 254 __u32 rcv_tsn; 255 __u32 rcv_cumtsn; 256 __u32 rcv_context; 257 sctp_assoc_t rcv_assoc_id; 258 }; 259 260 /* 5.3.6 SCTP Next Receive Information Structure (SCTP_NXTINFO) 261 * 262 * This cmsghdr structure describes SCTP receive information 263 * of the next message that will be delivered through recvmsg() 264 * if this information is already available when delivering 265 * the current message. 266 * 267 * cmsg_level cmsg_type cmsg_data[] 268 * ------------ ------------ ------------------- 269 * IPPROTO_SCTP SCTP_NXTINFO struct sctp_nxtinfo 270 */ 271 struct sctp_nxtinfo { 272 __u16 nxt_sid; 273 __u16 nxt_flags; 274 __u32 nxt_ppid; 275 __u32 nxt_length; 276 sctp_assoc_t nxt_assoc_id; 277 }; 278 279 /* 5.3.7 SCTP PR-SCTP Information Structure (SCTP_PRINFO) 280 * 281 * This cmsghdr structure specifies SCTP options for sendmsg(). 282 * 283 * cmsg_level cmsg_type cmsg_data[] 284 * ------------ ------------ ------------------- 285 * IPPROTO_SCTP SCTP_PRINFO struct sctp_prinfo 286 */ 287 struct sctp_prinfo { 288 __u16 pr_policy; 289 __u32 pr_value; 290 }; 291 292 /* 5.3.8 SCTP AUTH Information Structure (SCTP_AUTHINFO) 293 * 294 * This cmsghdr structure specifies SCTP options for sendmsg(). 295 * 296 * cmsg_level cmsg_type cmsg_data[] 297 * ------------ ------------ ------------------- 298 * IPPROTO_SCTP SCTP_AUTHINFO struct sctp_authinfo 299 */ 300 struct sctp_authinfo { 301 __u16 auth_keynumber; 302 }; 303 304 /* 305 * sinfo_flags: 16 bits (unsigned integer) 306 * 307 * This field may contain any of the following flags and is composed of 308 * a bitwise OR of these values. 309 */ 310 enum sctp_sinfo_flags { 311 SCTP_UNORDERED = (1 << 0), /* Send/receive message unordered. */ 312 SCTP_ADDR_OVER = (1 << 1), /* Override the primary destination. */ 313 SCTP_ABORT = (1 << 2), /* Send an ABORT message to the peer. */ 314 SCTP_SACK_IMMEDIATELY = (1 << 3), /* SACK should be sent without delay. */ 315 /* 2 bits here have been used by SCTP_PR_SCTP_MASK */ 316 SCTP_SENDALL = (1 << 6), 317 SCTP_PR_SCTP_ALL = (1 << 7), 318 SCTP_NOTIFICATION = MSG_NOTIFICATION, /* Next message is not user msg but notification. */ 319 SCTP_EOF = MSG_FIN, /* Initiate graceful shutdown process. */ 320 }; 321 322 typedef union { 323 __u8 raw; 324 struct sctp_initmsg init; 325 struct sctp_sndrcvinfo sndrcv; 326 } sctp_cmsg_data_t; 327 328 /* These are cmsg_types. */ 329 typedef enum sctp_cmsg_type { 330 SCTP_INIT, /* 5.2.1 SCTP Initiation Structure */ 331 #define SCTP_INIT SCTP_INIT 332 SCTP_SNDRCV, /* 5.2.2 SCTP Header Information Structure */ 333 #define SCTP_SNDRCV SCTP_SNDRCV 334 SCTP_SNDINFO, /* 5.3.4 SCTP Send Information Structure */ 335 #define SCTP_SNDINFO SCTP_SNDINFO 336 SCTP_RCVINFO, /* 5.3.5 SCTP Receive Information Structure */ 337 #define SCTP_RCVINFO SCTP_RCVINFO 338 SCTP_NXTINFO, /* 5.3.6 SCTP Next Receive Information Structure */ 339 #define SCTP_NXTINFO SCTP_NXTINFO 340 SCTP_PRINFO, /* 5.3.7 SCTP PR-SCTP Information Structure */ 341 #define SCTP_PRINFO SCTP_PRINFO 342 SCTP_AUTHINFO, /* 5.3.8 SCTP AUTH Information Structure */ 343 #define SCTP_AUTHINFO SCTP_AUTHINFO 344 SCTP_DSTADDRV4, /* 5.3.9 SCTP Destination IPv4 Address Structure */ 345 #define SCTP_DSTADDRV4 SCTP_DSTADDRV4 346 SCTP_DSTADDRV6, /* 5.3.10 SCTP Destination IPv6 Address Structure */ 347 #define SCTP_DSTADDRV6 SCTP_DSTADDRV6 348 } sctp_cmsg_t; 349 350 /* 351 * 5.3.1.1 SCTP_ASSOC_CHANGE 352 * 353 * Communication notifications inform the ULP that an SCTP association 354 * has either begun or ended. The identifier for a new association is 355 * provided by this notificaion. The notification information has the 356 * following format: 357 * 358 */ 359 struct sctp_assoc_change { 360 __u16 sac_type; 361 __u16 sac_flags; 362 __u32 sac_length; 363 __u16 sac_state; 364 __u16 sac_error; 365 __u16 sac_outbound_streams; 366 __u16 sac_inbound_streams; 367 sctp_assoc_t sac_assoc_id; 368 __u8 sac_info[]; 369 }; 370 371 /* 372 * sac_state: 32 bits (signed integer) 373 * 374 * This field holds one of a number of values that communicate the 375 * event that happened to the association. They include: 376 * 377 * Note: The following state names deviate from the API draft as 378 * the names clash too easily with other kernel symbols. 379 */ 380 enum sctp_sac_state { 381 SCTP_COMM_UP, 382 SCTP_COMM_LOST, 383 SCTP_RESTART, 384 SCTP_SHUTDOWN_COMP, 385 SCTP_CANT_STR_ASSOC, 386 }; 387 388 /* 389 * 5.3.1.2 SCTP_PEER_ADDR_CHANGE 390 * 391 * When a destination address on a multi-homed peer encounters a change 392 * an interface details event is sent. The information has the 393 * following structure: 394 */ 395 struct sctp_paddr_change { 396 __u16 spc_type; 397 __u16 spc_flags; 398 __u32 spc_length; 399 struct sockaddr_storage spc_aaddr; 400 int spc_state; 401 int spc_error; 402 sctp_assoc_t spc_assoc_id; 403 } __attribute__((packed, aligned(4))); 404 405 /* 406 * spc_state: 32 bits (signed integer) 407 * 408 * This field holds one of a number of values that communicate the 409 * event that happened to the address. They include: 410 */ 411 enum sctp_spc_state { 412 SCTP_ADDR_AVAILABLE, 413 SCTP_ADDR_UNREACHABLE, 414 SCTP_ADDR_REMOVED, 415 SCTP_ADDR_ADDED, 416 SCTP_ADDR_MADE_PRIM, 417 SCTP_ADDR_CONFIRMED, 418 SCTP_ADDR_POTENTIALLY_FAILED, 419 #define SCTP_ADDR_PF SCTP_ADDR_POTENTIALLY_FAILED 420 }; 421 422 423 /* 424 * 5.3.1.3 SCTP_REMOTE_ERROR 425 * 426 * A remote peer may send an Operational Error message to its peer. 427 * This message indicates a variety of error conditions on an 428 * association. The entire error TLV as it appears on the wire is 429 * included in a SCTP_REMOTE_ERROR event. Please refer to the SCTP 430 * specification [SCTP] and any extensions for a list of possible 431 * error formats. SCTP error TLVs have the format: 432 */ 433 struct sctp_remote_error { 434 __u16 sre_type; 435 __u16 sre_flags; 436 __u32 sre_length; 437 __be16 sre_error; 438 sctp_assoc_t sre_assoc_id; 439 __u8 sre_data[]; 440 }; 441 442 443 /* 444 * 5.3.1.4 SCTP_SEND_FAILED 445 * 446 * If SCTP cannot deliver a message it may return the message as a 447 * notification. 448 */ 449 struct sctp_send_failed { 450 __u16 ssf_type; 451 __u16 ssf_flags; 452 __u32 ssf_length; 453 __u32 ssf_error; 454 struct sctp_sndrcvinfo ssf_info; 455 sctp_assoc_t ssf_assoc_id; 456 __u8 ssf_data[]; 457 }; 458 459 struct sctp_send_failed_event { 460 __u16 ssf_type; 461 __u16 ssf_flags; 462 __u32 ssf_length; 463 __u32 ssf_error; 464 struct sctp_sndinfo ssfe_info; 465 sctp_assoc_t ssf_assoc_id; 466 __u8 ssf_data[]; 467 }; 468 469 /* 470 * ssf_flags: 16 bits (unsigned integer) 471 * 472 * The flag value will take one of the following values 473 * 474 * SCTP_DATA_UNSENT - Indicates that the data was never put on 475 * the wire. 476 * 477 * SCTP_DATA_SENT - Indicates that the data was put on the wire. 478 * Note that this does not necessarily mean that the 479 * data was (or was not) successfully delivered. 480 */ 481 enum sctp_ssf_flags { 482 SCTP_DATA_UNSENT, 483 SCTP_DATA_SENT, 484 }; 485 486 /* 487 * 5.3.1.5 SCTP_SHUTDOWN_EVENT 488 * 489 * When a peer sends a SHUTDOWN, SCTP delivers this notification to 490 * inform the application that it should cease sending data. 491 */ 492 struct sctp_shutdown_event { 493 __u16 sse_type; 494 __u16 sse_flags; 495 __u32 sse_length; 496 sctp_assoc_t sse_assoc_id; 497 }; 498 499 /* 500 * 5.3.1.6 SCTP_ADAPTATION_INDICATION 501 * 502 * When a peer sends a Adaptation Layer Indication parameter , SCTP 503 * delivers this notification to inform the application 504 * that of the peers requested adaptation layer. 505 */ 506 struct sctp_adaptation_event { 507 __u16 sai_type; 508 __u16 sai_flags; 509 __u32 sai_length; 510 __u32 sai_adaptation_ind; 511 sctp_assoc_t sai_assoc_id; 512 }; 513 514 /* 515 * 5.3.1.7 SCTP_PARTIAL_DELIVERY_EVENT 516 * 517 * When a receiver is engaged in a partial delivery of a 518 * message this notification will be used to indicate 519 * various events. 520 */ 521 struct sctp_pdapi_event { 522 __u16 pdapi_type; 523 __u16 pdapi_flags; 524 __u32 pdapi_length; 525 __u32 pdapi_indication; 526 sctp_assoc_t pdapi_assoc_id; 527 __u32 pdapi_stream; 528 __u32 pdapi_seq; 529 }; 530 531 enum { SCTP_PARTIAL_DELIVERY_ABORTED=0, }; 532 533 /* 534 * 5.3.1.8. SCTP_AUTHENTICATION_EVENT 535 * 536 * When a receiver is using authentication this message will provide 537 * notifications regarding new keys being made active as well as errors. 538 */ 539 struct sctp_authkey_event { 540 __u16 auth_type; 541 __u16 auth_flags; 542 __u32 auth_length; 543 __u16 auth_keynumber; 544 __u16 auth_altkeynumber; 545 __u32 auth_indication; 546 sctp_assoc_t auth_assoc_id; 547 }; 548 549 enum { 550 SCTP_AUTH_NEW_KEY, 551 #define SCTP_AUTH_NEWKEY SCTP_AUTH_NEW_KEY /* compatible with before */ 552 SCTP_AUTH_FREE_KEY, 553 SCTP_AUTH_NO_AUTH, 554 }; 555 556 /* 557 * 6.1.9. SCTP_SENDER_DRY_EVENT 558 * 559 * When the SCTP stack has no more user data to send or retransmit, this 560 * notification is given to the user. Also, at the time when a user app 561 * subscribes to this event, if there is no data to be sent or 562 * retransmit, the stack will immediately send up this notification. 563 */ 564 struct sctp_sender_dry_event { 565 __u16 sender_dry_type; 566 __u16 sender_dry_flags; 567 __u32 sender_dry_length; 568 sctp_assoc_t sender_dry_assoc_id; 569 }; 570 571 #define SCTP_STREAM_RESET_INCOMING_SSN 0x0001 572 #define SCTP_STREAM_RESET_OUTGOING_SSN 0x0002 573 #define SCTP_STREAM_RESET_DENIED 0x0004 574 #define SCTP_STREAM_RESET_FAILED 0x0008 575 struct sctp_stream_reset_event { 576 __u16 strreset_type; 577 __u16 strreset_flags; 578 __u32 strreset_length; 579 sctp_assoc_t strreset_assoc_id; 580 __u16 strreset_stream_list[]; 581 }; 582 583 #define SCTP_ASSOC_RESET_DENIED 0x0004 584 #define SCTP_ASSOC_RESET_FAILED 0x0008 585 struct sctp_assoc_reset_event { 586 __u16 assocreset_type; 587 __u16 assocreset_flags; 588 __u32 assocreset_length; 589 sctp_assoc_t assocreset_assoc_id; 590 __u32 assocreset_local_tsn; 591 __u32 assocreset_remote_tsn; 592 }; 593 594 #define SCTP_ASSOC_CHANGE_DENIED 0x0004 595 #define SCTP_ASSOC_CHANGE_FAILED 0x0008 596 #define SCTP_STREAM_CHANGE_DENIED SCTP_ASSOC_CHANGE_DENIED 597 #define SCTP_STREAM_CHANGE_FAILED SCTP_ASSOC_CHANGE_FAILED 598 struct sctp_stream_change_event { 599 __u16 strchange_type; 600 __u16 strchange_flags; 601 __u32 strchange_length; 602 sctp_assoc_t strchange_assoc_id; 603 __u16 strchange_instrms; 604 __u16 strchange_outstrms; 605 }; 606 607 /* 608 * Described in Section 7.3 609 * Ancillary Data and Notification Interest Options 610 */ 611 struct sctp_event_subscribe { 612 __u8 sctp_data_io_event; 613 __u8 sctp_association_event; 614 __u8 sctp_address_event; 615 __u8 sctp_send_failure_event; 616 __u8 sctp_peer_error_event; 617 __u8 sctp_shutdown_event; 618 __u8 sctp_partial_delivery_event; 619 __u8 sctp_adaptation_layer_event; 620 __u8 sctp_authentication_event; 621 __u8 sctp_sender_dry_event; 622 __u8 sctp_stream_reset_event; 623 __u8 sctp_assoc_reset_event; 624 __u8 sctp_stream_change_event; 625 __u8 sctp_send_failure_event_event; 626 }; 627 628 /* 629 * 5.3.1 SCTP Notification Structure 630 * 631 * The notification structure is defined as the union of all 632 * notification types. 633 * 634 */ 635 union sctp_notification { 636 struct { 637 __u16 sn_type; /* Notification type. */ 638 __u16 sn_flags; 639 __u32 sn_length; 640 } sn_header; 641 struct sctp_assoc_change sn_assoc_change; 642 struct sctp_paddr_change sn_paddr_change; 643 struct sctp_remote_error sn_remote_error; 644 struct sctp_send_failed sn_send_failed; 645 struct sctp_shutdown_event sn_shutdown_event; 646 struct sctp_adaptation_event sn_adaptation_event; 647 struct sctp_pdapi_event sn_pdapi_event; 648 struct sctp_authkey_event sn_authkey_event; 649 struct sctp_sender_dry_event sn_sender_dry_event; 650 struct sctp_stream_reset_event sn_strreset_event; 651 struct sctp_assoc_reset_event sn_assocreset_event; 652 struct sctp_stream_change_event sn_strchange_event; 653 struct sctp_send_failed_event sn_send_failed_event; 654 }; 655 656 /* Section 5.3.1 657 * All standard values for sn_type flags are greater than 2^15. 658 * Values from 2^15 and down are reserved. 659 */ 660 661 enum sctp_sn_type { 662 SCTP_SN_TYPE_BASE = (1<<15), 663 SCTP_DATA_IO_EVENT = SCTP_SN_TYPE_BASE, 664 #define SCTP_DATA_IO_EVENT SCTP_DATA_IO_EVENT 665 SCTP_ASSOC_CHANGE, 666 #define SCTP_ASSOC_CHANGE SCTP_ASSOC_CHANGE 667 SCTP_PEER_ADDR_CHANGE, 668 #define SCTP_PEER_ADDR_CHANGE SCTP_PEER_ADDR_CHANGE 669 SCTP_SEND_FAILED, 670 #define SCTP_SEND_FAILED SCTP_SEND_FAILED 671 SCTP_REMOTE_ERROR, 672 #define SCTP_REMOTE_ERROR SCTP_REMOTE_ERROR 673 SCTP_SHUTDOWN_EVENT, 674 #define SCTP_SHUTDOWN_EVENT SCTP_SHUTDOWN_EVENT 675 SCTP_PARTIAL_DELIVERY_EVENT, 676 #define SCTP_PARTIAL_DELIVERY_EVENT SCTP_PARTIAL_DELIVERY_EVENT 677 SCTP_ADAPTATION_INDICATION, 678 #define SCTP_ADAPTATION_INDICATION SCTP_ADAPTATION_INDICATION 679 SCTP_AUTHENTICATION_EVENT, 680 #define SCTP_AUTHENTICATION_INDICATION SCTP_AUTHENTICATION_EVENT 681 SCTP_SENDER_DRY_EVENT, 682 #define SCTP_SENDER_DRY_EVENT SCTP_SENDER_DRY_EVENT 683 SCTP_STREAM_RESET_EVENT, 684 #define SCTP_STREAM_RESET_EVENT SCTP_STREAM_RESET_EVENT 685 SCTP_ASSOC_RESET_EVENT, 686 #define SCTP_ASSOC_RESET_EVENT SCTP_ASSOC_RESET_EVENT 687 SCTP_STREAM_CHANGE_EVENT, 688 #define SCTP_STREAM_CHANGE_EVENT SCTP_STREAM_CHANGE_EVENT 689 SCTP_SEND_FAILED_EVENT, 690 #define SCTP_SEND_FAILED_EVENT SCTP_SEND_FAILED_EVENT 691 SCTP_SN_TYPE_MAX = SCTP_SEND_FAILED_EVENT, 692 #define SCTP_SN_TYPE_MAX SCTP_SN_TYPE_MAX 693 }; 694 695 /* Notification error codes used to fill up the error fields in some 696 * notifications. 697 * SCTP_PEER_ADDRESS_CHAGE : spc_error 698 * SCTP_ASSOC_CHANGE : sac_error 699 * These names should be potentially included in the draft 04 of the SCTP 700 * sockets API specification. 701 */ 702 typedef enum sctp_sn_error { 703 SCTP_FAILED_THRESHOLD, 704 SCTP_RECEIVED_SACK, 705 SCTP_HEARTBEAT_SUCCESS, 706 SCTP_RESPONSE_TO_USER_REQ, 707 SCTP_INTERNAL_ERROR, 708 SCTP_SHUTDOWN_GUARD_EXPIRES, 709 SCTP_PEER_FAULTY, 710 } sctp_sn_error_t; 711 712 /* 713 * 7.1.1 Retransmission Timeout Parameters (SCTP_RTOINFO) 714 * 715 * The protocol parameters used to initialize and bound retransmission 716 * timeout (RTO) are tunable. See [SCTP] for more information on how 717 * these parameters are used in RTO calculation. 718 */ 719 struct sctp_rtoinfo { 720 sctp_assoc_t srto_assoc_id; 721 __u32 srto_initial; 722 __u32 srto_max; 723 __u32 srto_min; 724 }; 725 726 /* 727 * 7.1.2 Association Parameters (SCTP_ASSOCINFO) 728 * 729 * This option is used to both examine and set various association and 730 * endpoint parameters. 731 */ 732 struct sctp_assocparams { 733 sctp_assoc_t sasoc_assoc_id; 734 __u16 sasoc_asocmaxrxt; 735 __u16 sasoc_number_peer_destinations; 736 __u32 sasoc_peer_rwnd; 737 __u32 sasoc_local_rwnd; 738 __u32 sasoc_cookie_life; 739 }; 740 741 /* 742 * 7.1.9 Set Peer Primary Address (SCTP_SET_PEER_PRIMARY_ADDR) 743 * 744 * Requests that the peer mark the enclosed address as the association 745 * primary. The enclosed address must be one of the association's 746 * locally bound addresses. The following structure is used to make a 747 * set primary request: 748 */ 749 struct sctp_setpeerprim { 750 sctp_assoc_t sspp_assoc_id; 751 struct sockaddr_storage sspp_addr; 752 } __attribute__((packed, aligned(4))); 753 754 /* 755 * 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR) 756 * 757 * Requests that the local SCTP stack use the enclosed peer address as 758 * the association primary. The enclosed address must be one of the 759 * association peer's addresses. The following structure is used to 760 * make a set peer primary request: 761 */ 762 struct sctp_prim { 763 sctp_assoc_t ssp_assoc_id; 764 struct sockaddr_storage ssp_addr; 765 } __attribute__((packed, aligned(4))); 766 767 /* For backward compatibility use, define the old name too */ 768 #define sctp_setprim sctp_prim 769 770 /* 771 * 7.1.11 Set Adaptation Layer Indicator (SCTP_ADAPTATION_LAYER) 772 * 773 * Requests that the local endpoint set the specified Adaptation Layer 774 * Indication parameter for all future INIT and INIT-ACK exchanges. 775 */ 776 struct sctp_setadaptation { 777 __u32 ssb_adaptation_ind; 778 }; 779 780 /* 781 * 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS) 782 * 783 * Applications can enable or disable heartbeats for any peer address 784 * of an association, modify an address's heartbeat interval, force a 785 * heartbeat to be sent immediately, and adjust the address's maximum 786 * number of retransmissions sent before an address is considered 787 * unreachable. The following structure is used to access and modify an 788 * address's parameters: 789 */ 790 enum sctp_spp_flags { 791 SPP_HB_ENABLE = 1<<0, /*Enable heartbeats*/ 792 SPP_HB_DISABLE = 1<<1, /*Disable heartbeats*/ 793 SPP_HB = SPP_HB_ENABLE | SPP_HB_DISABLE, 794 SPP_HB_DEMAND = 1<<2, /*Send heartbeat immediately*/ 795 SPP_PMTUD_ENABLE = 1<<3, /*Enable PMTU discovery*/ 796 SPP_PMTUD_DISABLE = 1<<4, /*Disable PMTU discovery*/ 797 SPP_PMTUD = SPP_PMTUD_ENABLE | SPP_PMTUD_DISABLE, 798 SPP_SACKDELAY_ENABLE = 1<<5, /*Enable SACK*/ 799 SPP_SACKDELAY_DISABLE = 1<<6, /*Disable SACK*/ 800 SPP_SACKDELAY = SPP_SACKDELAY_ENABLE | SPP_SACKDELAY_DISABLE, 801 SPP_HB_TIME_IS_ZERO = 1<<7, /* Set HB delay to 0 */ 802 SPP_IPV6_FLOWLABEL = 1<<8, 803 SPP_DSCP = 1<<9, 804 }; 805 806 struct sctp_paddrparams { 807 sctp_assoc_t spp_assoc_id; 808 struct sockaddr_storage spp_address; 809 __u32 spp_hbinterval; 810 __u16 spp_pathmaxrxt; 811 __u32 spp_pathmtu; 812 __u32 spp_sackdelay; 813 __u32 spp_flags; 814 __u32 spp_ipv6_flowlabel; 815 __u8 spp_dscp; 816 } __attribute__((packed, aligned(4))); 817 818 /* 819 * 7.1.18. Add a chunk that must be authenticated (SCTP_AUTH_CHUNK) 820 * 821 * This set option adds a chunk type that the user is requesting to be 822 * received only in an authenticated way. Changes to the list of chunks 823 * will only effect future associations on the socket. 824 */ 825 struct sctp_authchunk { 826 __u8 sauth_chunk; 827 }; 828 829 /* 830 * 7.1.19. Get or set the list of supported HMAC Identifiers (SCTP_HMAC_IDENT) 831 * 832 * This option gets or sets the list of HMAC algorithms that the local 833 * endpoint requires the peer to use. 834 */ 835 /* This here is only used by user space as is. It might not be a good idea 836 * to export/reveal the whole structure with reserved fields etc. 837 */ 838 enum { 839 SCTP_AUTH_HMAC_ID_SHA1 = 1, 840 SCTP_AUTH_HMAC_ID_SHA256 = 3, 841 }; 842 843 struct sctp_hmacalgo { 844 __u32 shmac_num_idents; 845 __u16 shmac_idents[]; 846 }; 847 848 /* Sadly, user and kernel space have different names for 849 * this structure member, so this is to not break anything. 850 */ 851 #define shmac_number_of_idents shmac_num_idents 852 853 /* 854 * 7.1.20. Set a shared key (SCTP_AUTH_KEY) 855 * 856 * This option will set a shared secret key which is used to build an 857 * association shared key. 858 */ 859 struct sctp_authkey { 860 sctp_assoc_t sca_assoc_id; 861 __u16 sca_keynumber; 862 __u16 sca_keylength; 863 __u8 sca_key[]; 864 }; 865 866 /* 867 * 7.1.21. Get or set the active shared key (SCTP_AUTH_ACTIVE_KEY) 868 * 869 * This option will get or set the active shared key to be used to build 870 * the association shared key. 871 */ 872 873 struct sctp_authkeyid { 874 sctp_assoc_t scact_assoc_id; 875 __u16 scact_keynumber; 876 }; 877 878 879 /* 880 * 7.1.23. Get or set delayed ack timer (SCTP_DELAYED_SACK) 881 * 882 * This option will effect the way delayed acks are performed. This 883 * option allows you to get or set the delayed ack time, in 884 * milliseconds. It also allows changing the delayed ack frequency. 885 * Changing the frequency to 1 disables the delayed sack algorithm. If 886 * the assoc_id is 0, then this sets or gets the endpoints default 887 * values. If the assoc_id field is non-zero, then the set or get 888 * effects the specified association for the one to many model (the 889 * assoc_id field is ignored by the one to one model). Note that if 890 * sack_delay or sack_freq are 0 when setting this option, then the 891 * current values will remain unchanged. 892 */ 893 struct sctp_sack_info { 894 sctp_assoc_t sack_assoc_id; 895 uint32_t sack_delay; 896 uint32_t sack_freq; 897 }; 898 899 struct sctp_assoc_value { 900 sctp_assoc_t assoc_id; 901 uint32_t assoc_value; 902 }; 903 904 struct sctp_stream_value { 905 sctp_assoc_t assoc_id; 906 uint16_t stream_id; 907 uint16_t stream_value; 908 }; 909 910 /* 911 * 7.2.2 Peer Address Information 912 * 913 * Applications can retrieve information about a specific peer address 914 * of an association, including its reachability state, congestion 915 * window, and retransmission timer values. This information is 916 * read-only. The following structure is used to access this 917 * information: 918 */ 919 struct sctp_paddrinfo { 920 sctp_assoc_t spinfo_assoc_id; 921 struct sockaddr_storage spinfo_address; 922 __s32 spinfo_state; 923 __u32 spinfo_cwnd; 924 __u32 spinfo_srtt; 925 __u32 spinfo_rto; 926 __u32 spinfo_mtu; 927 } __attribute__((packed, aligned(4))); 928 929 /* Peer addresses's state. */ 930 /* UNKNOWN: Peer address passed by the upper layer in sendmsg or connect[x] 931 * calls. 932 * UNCONFIRMED: Peer address received in INIT/INIT-ACK address parameters. 933 * Not yet confirmed by a heartbeat and not available for data 934 * transfers. 935 * ACTIVE : Peer address confirmed, active and available for data transfers. 936 * INACTIVE: Peer address inactive and not available for data transfers. 937 */ 938 enum sctp_spinfo_state { 939 SCTP_INACTIVE, 940 SCTP_PF, 941 #define SCTP_POTENTIALLY_FAILED SCTP_PF 942 SCTP_ACTIVE, 943 SCTP_UNCONFIRMED, 944 SCTP_UNKNOWN = 0xffff /* Value used for transport state unknown */ 945 }; 946 947 /* 948 * 7.2.1 Association Status (SCTP_STATUS) 949 * 950 * Applications can retrieve current status information about an 951 * association, including association state, peer receiver window size, 952 * number of unacked data chunks, and number of data chunks pending 953 * receipt. This information is read-only. The following structure is 954 * used to access this information: 955 */ 956 struct sctp_status { 957 sctp_assoc_t sstat_assoc_id; 958 __s32 sstat_state; 959 __u32 sstat_rwnd; 960 __u16 sstat_unackdata; 961 __u16 sstat_penddata; 962 __u16 sstat_instrms; 963 __u16 sstat_outstrms; 964 __u32 sstat_fragmentation_point; 965 struct sctp_paddrinfo sstat_primary; 966 }; 967 968 /* 969 * 7.2.3. Get the list of chunks the peer requires to be authenticated 970 * (SCTP_PEER_AUTH_CHUNKS) 971 * 972 * This option gets a list of chunks for a specified association that 973 * the peer requires to be received authenticated only. 974 */ 975 struct sctp_authchunks { 976 sctp_assoc_t gauth_assoc_id; 977 __u32 gauth_number_of_chunks; 978 uint8_t gauth_chunks[]; 979 }; 980 981 /* The broken spelling has been released already in lksctp-tools header, 982 * so don't break anyone, now that it's fixed. 983 */ 984 #define guth_number_of_chunks gauth_number_of_chunks 985 986 /* Association states. */ 987 enum sctp_sstat_state { 988 SCTP_EMPTY = 0, 989 SCTP_CLOSED = 1, 990 SCTP_COOKIE_WAIT = 2, 991 SCTP_COOKIE_ECHOED = 3, 992 SCTP_ESTABLISHED = 4, 993 SCTP_SHUTDOWN_PENDING = 5, 994 SCTP_SHUTDOWN_SENT = 6, 995 SCTP_SHUTDOWN_RECEIVED = 7, 996 SCTP_SHUTDOWN_ACK_SENT = 8, 997 }; 998 999 /* 1000 * 8.2.6. Get the Current Identifiers of Associations 1001 * (SCTP_GET_ASSOC_ID_LIST) 1002 * 1003 * This option gets the current list of SCTP association identifiers of 1004 * the SCTP associations handled by a one-to-many style socket. 1005 */ 1006 struct sctp_assoc_ids { 1007 __u32 gaids_number_of_ids; 1008 sctp_assoc_t gaids_assoc_id[]; 1009 }; 1010 1011 /* 1012 * 8.3, 8.5 get all peer/local addresses in an association. 1013 * This parameter struct is used by SCTP_GET_PEER_ADDRS and 1014 * SCTP_GET_LOCAL_ADDRS socket options used internally to implement 1015 * sctp_getpaddrs() and sctp_getladdrs() API. 1016 */ 1017 struct sctp_getaddrs_old { 1018 sctp_assoc_t assoc_id; 1019 int addr_num; 1020 struct sockaddr *addrs; 1021 }; 1022 1023 struct sctp_getaddrs { 1024 sctp_assoc_t assoc_id; /*input*/ 1025 __u32 addr_num; /*output*/ 1026 __u8 addrs[]; /*output, variable size*/ 1027 }; 1028 1029 /* A socket user request obtained via SCTP_GET_ASSOC_STATS that retrieves 1030 * association stats. All stats are counts except sas_maxrto and 1031 * sas_obs_rto_ipaddr. maxrto is the max observed rto + transport since 1032 * the last call. Will return 0 when RTO was not update since last call 1033 */ 1034 struct sctp_assoc_stats { 1035 sctp_assoc_t sas_assoc_id; /* Input */ 1036 /* Transport of observed max RTO */ 1037 struct sockaddr_storage sas_obs_rto_ipaddr; 1038 __u64 sas_maxrto; /* Maximum Observed RTO for period */ 1039 __u64 sas_isacks; /* SACKs received */ 1040 __u64 sas_osacks; /* SACKs sent */ 1041 __u64 sas_opackets; /* Packets sent */ 1042 __u64 sas_ipackets; /* Packets received */ 1043 __u64 sas_rtxchunks; /* Retransmitted Chunks */ 1044 __u64 sas_outofseqtsns;/* TSN received > next expected */ 1045 __u64 sas_idupchunks; /* Dups received (ordered+unordered) */ 1046 __u64 sas_gapcnt; /* Gap Acknowledgements Received */ 1047 __u64 sas_ouodchunks; /* Unordered data chunks sent */ 1048 __u64 sas_iuodchunks; /* Unordered data chunks received */ 1049 __u64 sas_oodchunks; /* Ordered data chunks sent */ 1050 __u64 sas_iodchunks; /* Ordered data chunks received */ 1051 __u64 sas_octrlchunks; /* Control chunks sent */ 1052 __u64 sas_ictrlchunks; /* Control chunks received */ 1053 }; 1054 1055 /* 1056 * 8.1 sctp_bindx() 1057 * 1058 * The flags parameter is formed from the bitwise OR of zero or more of the 1059 * following currently defined flags: 1060 */ 1061 #define SCTP_BINDX_ADD_ADDR 0x01 1062 #define SCTP_BINDX_REM_ADDR 0x02 1063 1064 /* This is the structure that is passed as an argument(optval) to 1065 * getsockopt(SCTP_SOCKOPT_PEELOFF). 1066 */ 1067 typedef struct { 1068 sctp_assoc_t associd; 1069 int sd; 1070 } sctp_peeloff_arg_t; 1071 1072 typedef struct { 1073 sctp_peeloff_arg_t p_arg; 1074 unsigned flags; 1075 } sctp_peeloff_flags_arg_t; 1076 1077 /* 1078 * Peer Address Thresholds socket option 1079 */ 1080 struct sctp_paddrthlds { 1081 sctp_assoc_t spt_assoc_id; 1082 struct sockaddr_storage spt_address; 1083 __u16 spt_pathmaxrxt; 1084 __u16 spt_pathpfthld; 1085 }; 1086 1087 /* Use a new structure with spt_pathcpthld for back compatibility */ 1088 struct sctp_paddrthlds_v2 { 1089 sctp_assoc_t spt_assoc_id; 1090 struct sockaddr_storage spt_address; 1091 __u16 spt_pathmaxrxt; 1092 __u16 spt_pathpfthld; 1093 __u16 spt_pathcpthld; 1094 }; 1095 1096 /* 1097 * Socket Option for Getting the Association/Stream-Specific PR-SCTP Status 1098 */ 1099 struct sctp_prstatus { 1100 sctp_assoc_t sprstat_assoc_id; 1101 __u16 sprstat_sid; 1102 __u16 sprstat_policy; 1103 __u64 sprstat_abandoned_unsent; 1104 __u64 sprstat_abandoned_sent; 1105 }; 1106 1107 struct sctp_default_prinfo { 1108 sctp_assoc_t pr_assoc_id; 1109 __u32 pr_value; 1110 __u16 pr_policy; 1111 }; 1112 1113 struct sctp_info { 1114 __u32 sctpi_tag; 1115 __u32 sctpi_state; 1116 __u32 sctpi_rwnd; 1117 __u16 sctpi_unackdata; 1118 __u16 sctpi_penddata; 1119 __u16 sctpi_instrms; 1120 __u16 sctpi_outstrms; 1121 __u32 sctpi_fragmentation_point; 1122 __u32 sctpi_inqueue; 1123 __u32 sctpi_outqueue; 1124 __u32 sctpi_overall_error; 1125 __u32 sctpi_max_burst; 1126 __u32 sctpi_maxseg; 1127 __u32 sctpi_peer_rwnd; 1128 __u32 sctpi_peer_tag; 1129 __u8 sctpi_peer_capable; 1130 __u8 sctpi_peer_sack; 1131 __u16 __reserved1; 1132 1133 /* assoc status info */ 1134 __u64 sctpi_isacks; 1135 __u64 sctpi_osacks; 1136 __u64 sctpi_opackets; 1137 __u64 sctpi_ipackets; 1138 __u64 sctpi_rtxchunks; 1139 __u64 sctpi_outofseqtsns; 1140 __u64 sctpi_idupchunks; 1141 __u64 sctpi_gapcnt; 1142 __u64 sctpi_ouodchunks; 1143 __u64 sctpi_iuodchunks; 1144 __u64 sctpi_oodchunks; 1145 __u64 sctpi_iodchunks; 1146 __u64 sctpi_octrlchunks; 1147 __u64 sctpi_ictrlchunks; 1148 1149 /* primary transport info */ 1150 struct sockaddr_storage sctpi_p_address; 1151 __s32 sctpi_p_state; 1152 __u32 sctpi_p_cwnd; 1153 __u32 sctpi_p_srtt; 1154 __u32 sctpi_p_rto; 1155 __u32 sctpi_p_hbinterval; 1156 __u32 sctpi_p_pathmaxrxt; 1157 __u32 sctpi_p_sackdelay; 1158 __u32 sctpi_p_sackfreq; 1159 __u32 sctpi_p_ssthresh; 1160 __u32 sctpi_p_partial_bytes_acked; 1161 __u32 sctpi_p_flight_size; 1162 __u16 sctpi_p_error; 1163 __u16 __reserved2; 1164 1165 /* sctp sock info */ 1166 __u32 sctpi_s_autoclose; 1167 __u32 sctpi_s_adaptation_ind; 1168 __u32 sctpi_s_pd_point; 1169 __u8 sctpi_s_nodelay; 1170 __u8 sctpi_s_disable_fragments; 1171 __u8 sctpi_s_v4mapped; 1172 __u8 sctpi_s_frag_interleave; 1173 __u32 sctpi_s_type; 1174 __u32 __reserved3; 1175 }; 1176 1177 struct sctp_reset_streams { 1178 sctp_assoc_t srs_assoc_id; 1179 uint16_t srs_flags; 1180 uint16_t srs_number_streams; /* 0 == ALL */ 1181 uint16_t srs_stream_list[]; /* list if srs_num_streams is not 0 */ 1182 }; 1183 1184 struct sctp_add_streams { 1185 sctp_assoc_t sas_assoc_id; 1186 uint16_t sas_instrms; 1187 uint16_t sas_outstrms; 1188 }; 1189 1190 struct sctp_event { 1191 sctp_assoc_t se_assoc_id; 1192 uint16_t se_type; 1193 uint8_t se_on; 1194 }; 1195 1196 struct sctp_udpencaps { 1197 sctp_assoc_t sue_assoc_id; 1198 struct sockaddr_storage sue_address; 1199 uint16_t sue_port; 1200 }; 1201 1202 /* SCTP Stream schedulers */ 1203 enum sctp_sched_type { 1204 SCTP_SS_FCFS, 1205 SCTP_SS_DEFAULT = SCTP_SS_FCFS, 1206 SCTP_SS_PRIO, 1207 SCTP_SS_RR, 1208 SCTP_SS_FC, 1209 SCTP_SS_WFQ, 1210 SCTP_SS_MAX = SCTP_SS_WFQ 1211 }; 1212 1213 /* Probe Interval socket option */ 1214 struct sctp_probeinterval { 1215 sctp_assoc_t spi_assoc_id; 1216 struct sockaddr_storage spi_address; 1217 __u32 spi_interval; 1218 }; 1219 1220 #endif /* _SCTP_H */