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