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 _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 #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 #ifndef __KERNEL__
836 /* This here is only used by user space as is. It might not be a good idea
837 * to export/reveal the whole structure with reserved fields etc.
838 */
839 enum {
840 SCTP_AUTH_HMAC_ID_SHA1 = 1,
841 SCTP_AUTH_HMAC_ID_SHA256 = 3,
842 };
843 #endif
844
845 struct sctp_hmacalgo {
846 __u32 shmac_num_idents;
847 __u16 shmac_idents[];
848 };
849
850 /* Sadly, user and kernel space have different names for
851 * this structure member, so this is to not break anything.
852 */
853 #define shmac_number_of_idents shmac_num_idents
854
855 /*
856 * 7.1.20. Set a shared key (SCTP_AUTH_KEY)
857 *
858 * This option will set a shared secret key which is used to build an
859 * association shared key.
860 */
861 struct sctp_authkey {
862 sctp_assoc_t sca_assoc_id;
863 __u16 sca_keynumber;
864 __u16 sca_keylength;
865 __u8 sca_key[];
866 };
867
868 /*
869 * 7.1.21. Get or set the active shared key (SCTP_AUTH_ACTIVE_KEY)
870 *
871 * This option will get or set the active shared key to be used to build
872 * the association shared key.
873 */
874
875 struct sctp_authkeyid {
876 sctp_assoc_t scact_assoc_id;
877 __u16 scact_keynumber;
878 };
879
880
881 /*
882 * 7.1.23. Get or set delayed ack timer (SCTP_DELAYED_SACK)
883 *
884 * This option will effect the way delayed acks are performed. This
885 * option allows you to get or set the delayed ack time, in
886 * milliseconds. It also allows changing the delayed ack frequency.
887 * Changing the frequency to 1 disables the delayed sack algorithm. If
888 * the assoc_id is 0, then this sets or gets the endpoints default
889 * values. If the assoc_id field is non-zero, then the set or get
890 * effects the specified association for the one to many model (the
891 * assoc_id field is ignored by the one to one model). Note that if
892 * sack_delay or sack_freq are 0 when setting this option, then the
893 * current values will remain unchanged.
894 */
895 struct sctp_sack_info {
896 sctp_assoc_t sack_assoc_id;
897 uint32_t sack_delay;
898 uint32_t sack_freq;
899 };
900
901 struct sctp_assoc_value {
902 sctp_assoc_t assoc_id;
903 uint32_t assoc_value;
904 };
905
906 struct sctp_stream_value {
907 sctp_assoc_t assoc_id;
908 uint16_t stream_id;
909 uint16_t stream_value;
910 };
911
912 /*
913 * 7.2.2 Peer Address Information
914 *
915 * Applications can retrieve information about a specific peer address
916 * of an association, including its reachability state, congestion
917 * window, and retransmission timer values. This information is
918 * read-only. The following structure is used to access this
919 * information:
920 */
921 struct sctp_paddrinfo {
922 sctp_assoc_t spinfo_assoc_id;
923 struct sockaddr_storage spinfo_address;
924 __s32 spinfo_state;
925 __u32 spinfo_cwnd;
926 __u32 spinfo_srtt;
927 __u32 spinfo_rto;
928 __u32 spinfo_mtu;
929 } __attribute__((packed, aligned(4)));
930
931 /* Peer addresses's state. */
932 /* UNKNOWN: Peer address passed by the upper layer in sendmsg or connect[x]
933 * calls.
934 * UNCONFIRMED: Peer address received in INIT/INIT-ACK address parameters.
935 * Not yet confirmed by a heartbeat and not available for data
936 * transfers.
937 * ACTIVE : Peer address confirmed, active and available for data transfers.
938 * INACTIVE: Peer address inactive and not available for data transfers.
939 */
940 enum sctp_spinfo_state {
941 SCTP_INACTIVE,
942 SCTP_PF,
943 #define SCTP_POTENTIALLY_FAILED SCTP_PF
944 SCTP_ACTIVE,
945 SCTP_UNCONFIRMED,
946 SCTP_UNKNOWN = 0xffff /* Value used for transport state unknown */
947 };
948
949 /*
950 * 7.2.1 Association Status (SCTP_STATUS)
951 *
952 * Applications can retrieve current status information about an
953 * association, including association state, peer receiver window size,
954 * number of unacked data chunks, and number of data chunks pending
955 * receipt. This information is read-only. The following structure is
956 * used to access this information:
957 */
958 struct sctp_status {
959 sctp_assoc_t sstat_assoc_id;
960 __s32 sstat_state;
961 __u32 sstat_rwnd;
962 __u16 sstat_unackdata;
963 __u16 sstat_penddata;
964 __u16 sstat_instrms;
965 __u16 sstat_outstrms;
966 __u32 sstat_fragmentation_point;
967 struct sctp_paddrinfo sstat_primary;
968 };
969
970 /*
971 * 7.2.3. Get the list of chunks the peer requires to be authenticated
972 * (SCTP_PEER_AUTH_CHUNKS)
973 *
974 * This option gets a list of chunks for a specified association that
975 * the peer requires to be received authenticated only.
976 */
977 struct sctp_authchunks {
978 sctp_assoc_t gauth_assoc_id;
979 __u32 gauth_number_of_chunks;
980 uint8_t gauth_chunks[];
981 };
982
983 /* The broken spelling has been released already in lksctp-tools header,
984 * so don't break anyone, now that it's fixed.
985 */
986 #define guth_number_of_chunks gauth_number_of_chunks
987
988 /* Association states. */
989 enum sctp_sstat_state {
990 SCTP_EMPTY = 0,
991 SCTP_CLOSED = 1,
992 SCTP_COOKIE_WAIT = 2,
993 SCTP_COOKIE_ECHOED = 3,
994 SCTP_ESTABLISHED = 4,
995 SCTP_SHUTDOWN_PENDING = 5,
996 SCTP_SHUTDOWN_SENT = 6,
997 SCTP_SHUTDOWN_RECEIVED = 7,
998 SCTP_SHUTDOWN_ACK_SENT = 8,
999 };
1000
1001 /*
1002 * 8.2.6. Get the Current Identifiers of Associations
1003 * (SCTP_GET_ASSOC_ID_LIST)
1004 *
1005 * This option gets the current list of SCTP association identifiers of
1006 * the SCTP associations handled by a one-to-many style socket.
1007 */
1008 struct sctp_assoc_ids {
1009 __u32 gaids_number_of_ids;
1010 sctp_assoc_t gaids_assoc_id[];
1011 };
1012
1013 /*
1014 * 8.3, 8.5 get all peer/local addresses in an association.
1015 * This parameter struct is used by SCTP_GET_PEER_ADDRS and
1016 * SCTP_GET_LOCAL_ADDRS socket options used internally to implement
1017 * sctp_getpaddrs() and sctp_getladdrs() API.
1018 */
1019 struct sctp_getaddrs_old {
1020 sctp_assoc_t assoc_id;
1021 int addr_num;
1022 #ifdef __KERNEL__
1023 struct sockaddr __user *addrs;
1024 #else
1025 struct sockaddr *addrs;
1026 #endif
1027 };
1028
1029 struct sctp_getaddrs {
1030 sctp_assoc_t assoc_id; /*input*/
1031 __u32 addr_num; /*output*/
1032 __u8 addrs[]; /*output, variable size*/
1033 };
1034
1035 /* A socket user request obtained via SCTP_GET_ASSOC_STATS that retrieves
1036 * association stats. All stats are counts except sas_maxrto and
1037 * sas_obs_rto_ipaddr. maxrto is the max observed rto + transport since
1038 * the last call. Will return 0 when RTO was not update since last call
1039 */
1040 struct sctp_assoc_stats {
1041 sctp_assoc_t sas_assoc_id; /* Input */
1042 /* Transport of observed max RTO */
1043 struct sockaddr_storage sas_obs_rto_ipaddr;
1044 __u64 sas_maxrto; /* Maximum Observed RTO for period */
1045 __u64 sas_isacks; /* SACKs received */
1046 __u64 sas_osacks; /* SACKs sent */
1047 __u64 sas_opackets; /* Packets sent */
1048 __u64 sas_ipackets; /* Packets received */
1049 __u64 sas_rtxchunks; /* Retransmitted Chunks */
1050 __u64 sas_outofseqtsns;/* TSN received > next expected */
1051 __u64 sas_idupchunks; /* Dups received (ordered+unordered) */
1052 __u64 sas_gapcnt; /* Gap Acknowledgements Received */
1053 __u64 sas_ouodchunks; /* Unordered data chunks sent */
1054 __u64 sas_iuodchunks; /* Unordered data chunks received */
1055 __u64 sas_oodchunks; /* Ordered data chunks sent */
1056 __u64 sas_iodchunks; /* Ordered data chunks received */
1057 __u64 sas_octrlchunks; /* Control chunks sent */
1058 __u64 sas_ictrlchunks; /* Control chunks received */
1059 };
1060
1061 /*
1062 * 8.1 sctp_bindx()
1063 *
1064 * The flags parameter is formed from the bitwise OR of zero or more of the
1065 * following currently defined flags:
1066 */
1067 #define SCTP_BINDX_ADD_ADDR 0x01
1068 #define SCTP_BINDX_REM_ADDR 0x02
1069
1070 /* This is the structure that is passed as an argument(optval) to
1071 * getsockopt(SCTP_SOCKOPT_PEELOFF).
1072 */
1073 typedef struct {
1074 sctp_assoc_t associd;
1075 int sd;
1076 } sctp_peeloff_arg_t;
1077
1078 typedef struct {
1079 sctp_peeloff_arg_t p_arg;
1080 unsigned flags;
1081 } sctp_peeloff_flags_arg_t;
1082
1083 /*
1084 * Peer Address Thresholds socket option
1085 */
1086 struct sctp_paddrthlds {
1087 sctp_assoc_t spt_assoc_id;
1088 struct sockaddr_storage spt_address;
1089 __u16 spt_pathmaxrxt;
1090 __u16 spt_pathpfthld;
1091 };
1092
1093 /* Use a new structure with spt_pathcpthld for back compatibility */
1094 struct sctp_paddrthlds_v2 {
1095 sctp_assoc_t spt_assoc_id;
1096 struct sockaddr_storage spt_address;
1097 __u16 spt_pathmaxrxt;
1098 __u16 spt_pathpfthld;
1099 __u16 spt_pathcpthld;
1100 };
1101
1102 /*
1103 * Socket Option for Getting the Association/Stream-Specific PR-SCTP Status
1104 */
1105 struct sctp_prstatus {
1106 sctp_assoc_t sprstat_assoc_id;
1107 __u16 sprstat_sid;
1108 __u16 sprstat_policy;
1109 __u64 sprstat_abandoned_unsent;
1110 __u64 sprstat_abandoned_sent;
1111 };
1112
1113 struct sctp_default_prinfo {
1114 sctp_assoc_t pr_assoc_id;
1115 __u32 pr_value;
1116 __u16 pr_policy;
1117 };
1118
1119 struct sctp_info {
1120 __u32 sctpi_tag;
1121 __u32 sctpi_state;
1122 __u32 sctpi_rwnd;
1123 __u16 sctpi_unackdata;
1124 __u16 sctpi_penddata;
1125 __u16 sctpi_instrms;
1126 __u16 sctpi_outstrms;
1127 __u32 sctpi_fragmentation_point;
1128 __u32 sctpi_inqueue;
1129 __u32 sctpi_outqueue;
1130 __u32 sctpi_overall_error;
1131 __u32 sctpi_max_burst;
1132 __u32 sctpi_maxseg;
1133 __u32 sctpi_peer_rwnd;
1134 __u32 sctpi_peer_tag;
1135 __u8 sctpi_peer_capable;
1136 __u8 sctpi_peer_sack;
1137 __u16 __reserved1;
1138
1139 /* assoc status info */
1140 __u64 sctpi_isacks;
1141 __u64 sctpi_osacks;
1142 __u64 sctpi_opackets;
1143 __u64 sctpi_ipackets;
1144 __u64 sctpi_rtxchunks;
1145 __u64 sctpi_outofseqtsns;
1146 __u64 sctpi_idupchunks;
1147 __u64 sctpi_gapcnt;
1148 __u64 sctpi_ouodchunks;
1149 __u64 sctpi_iuodchunks;
1150 __u64 sctpi_oodchunks;
1151 __u64 sctpi_iodchunks;
1152 __u64 sctpi_octrlchunks;
1153 __u64 sctpi_ictrlchunks;
1154
1155 /* primary transport info */
1156 struct sockaddr_storage sctpi_p_address;
1157 __s32 sctpi_p_state;
1158 __u32 sctpi_p_cwnd;
1159 __u32 sctpi_p_srtt;
1160 __u32 sctpi_p_rto;
1161 __u32 sctpi_p_hbinterval;
1162 __u32 sctpi_p_pathmaxrxt;
1163 __u32 sctpi_p_sackdelay;
1164 __u32 sctpi_p_sackfreq;
1165 __u32 sctpi_p_ssthresh;
1166 __u32 sctpi_p_partial_bytes_acked;
1167 __u32 sctpi_p_flight_size;
1168 __u16 sctpi_p_error;
1169 __u16 __reserved2;
1170
1171 /* sctp sock info */
1172 __u32 sctpi_s_autoclose;
1173 __u32 sctpi_s_adaptation_ind;
1174 __u32 sctpi_s_pd_point;
1175 __u8 sctpi_s_nodelay;
1176 __u8 sctpi_s_disable_fragments;
1177 __u8 sctpi_s_v4mapped;
1178 __u8 sctpi_s_frag_interleave;
1179 __u32 sctpi_s_type;
1180 __u32 __reserved3;
1181 };
1182
1183 struct sctp_reset_streams {
1184 sctp_assoc_t srs_assoc_id;
1185 uint16_t srs_flags;
1186 uint16_t srs_number_streams; /* 0 == ALL */
1187 uint16_t srs_stream_list[]; /* list if srs_num_streams is not 0 */
1188 };
1189
1190 struct sctp_add_streams {
1191 sctp_assoc_t sas_assoc_id;
1192 uint16_t sas_instrms;
1193 uint16_t sas_outstrms;
1194 };
1195
1196 struct sctp_event {
1197 sctp_assoc_t se_assoc_id;
1198 uint16_t se_type;
1199 uint8_t se_on;
1200 };
1201
1202 struct sctp_udpencaps {
1203 sctp_assoc_t sue_assoc_id;
1204 struct sockaddr_storage sue_address;
1205 uint16_t sue_port;
1206 };
1207
1208 /* SCTP Stream schedulers */
1209 enum sctp_sched_type {
1210 SCTP_SS_FCFS,
1211 SCTP_SS_DEFAULT = SCTP_SS_FCFS,
1212 SCTP_SS_PRIO,
1213 SCTP_SS_RR,
1214 SCTP_SS_FC,
1215 SCTP_SS_WFQ,
1216 SCTP_SS_MAX = SCTP_SS_WFQ
1217 };
1218
1219 /* Probe Interval socket option */
1220 struct sctp_probeinterval {
1221 sctp_assoc_t spi_assoc_id;
1222 struct sockaddr_storage spi_address;
1223 __u32 spi_interval;
1224 };
1225
1226 #endif /* _UAPI_SCTP_H */
1227
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