summaryrefslogtreecommitdiffstats
path: root/include/net/sctp/user.h
blob: be2334aaf52e84a149489ef05dd89a1dee48abde (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
/* SCTP kernel implementation
 * (C) Copyright IBM Corp. 2001, 2004
 * Copyright (c) 1999-2000 Cisco, Inc.
 * Copyright (c) 1999-2001 Motorola, Inc.
 * Copyright (c) 2002 Intel Corp.
 *
 * This file is part of the SCTP kernel implementation
 *
 * This header represents the structures and constants needed to support
 * the SCTP Extension to the Sockets API.
 *
 * This SCTP implementation is free software;
 * you can redistribute it and/or modify it under the terms of
 * the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This SCTP implementation is distributed in the hope that it
 * will be useful, but WITHOUT ANY WARRANTY; without even the implied
 *                 ************************
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with GNU CC; see the file COPYING.  If not, write to
 * the Free Software Foundation, 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * Please send any bug reports or fixes you make to the
 * email address(es):
 *    lksctp developers <lksctp-developers@lists.sourceforge.net>
 *
 * Or submit a bug report through the following website:
 *    http://www.sf.net/projects/lksctp
 *
 * Written or modified by:
 *    La Monte H.P. Yarroll    <piggy@acm.org>
 *    R. Stewart               <randall@sctp.chicago.il.us>
 *    K. Morneau               <kmorneau@cisco.com>
 *    Q. Xie                   <qxie1@email.mot.com>
 *    Karl Knutson             <karl@athena.chicago.il.us>
 *    Jon Grimm                <jgrimm@us.ibm.com>
 *    Daisy Chang              <daisyc@us.ibm.com>
 *    Ryan Layer               <rmlayer@us.ibm.com>
 *    Ardelle Fan	       <ardelle.fan@intel.com>
 *    Sridhar Samudrala        <sri@us.ibm.com>
 *
 * Any bugs reported given to us we will try to fix... any fixes shared will
 * be incorporated into the next SCTP release.
 */

#ifndef __net_sctp_user_h__
#define __net_sctp_user_h__

#include <linux/types.h>
#include <linux/socket.h>

typedef __s32 sctp_assoc_t;

/* The following symbols come from the Sockets API Extensions for
 * SCTP <draft-ietf-tsvwg-sctpsocket-07.txt>.
 */
enum sctp_optname {
	SCTP_RTOINFO,
#define SCTP_RTOINFO SCTP_RTOINFO
	SCTP_ASSOCINFO,
#define SCTP_ASSOCINFO SCTP_ASSOCINFO
	SCTP_INITMSG,
#define SCTP_INITMSG SCTP_INITMSG
	SCTP_NODELAY, 	/* Get/set nodelay option. */
#define SCTP_NODELAY	SCTP_NODELAY
	SCTP_AUTOCLOSE,
#define SCTP_AUTOCLOSE SCTP_AUTOCLOSE
	SCTP_SET_PEER_PRIMARY_ADDR, 
#define SCTP_SET_PEER_PRIMARY_ADDR SCTP_SET_PEER_PRIMARY_ADDR
	SCTP_PRIMARY_ADDR,
#define SCTP_PRIMARY_ADDR SCTP_PRIMARY_ADDR
	SCTP_ADAPTATION_LAYER,
#define SCTP_ADAPTATION_LAYER SCTP_ADAPTATION_LAYER
	SCTP_DISABLE_FRAGMENTS,
#define SCTP_DISABLE_FRAGMENTS SCTP_DISABLE_FRAGMENTS
	SCTP_PEER_ADDR_PARAMS,
#define SCTP_PEER_ADDR_PARAMS SCTP_PEER_ADDR_PARAMS
	SCTP_DEFAULT_SEND_PARAM,
#define SCTP_DEFAULT_SEND_PARAM SCTP_DEFAULT_SEND_PARAM
	SCTP_EVENTS,
#define SCTP_EVENTS SCTP_EVENTS
	SCTP_I_WANT_MAPPED_V4_ADDR,  /* Turn on/off mapped v4 addresses  */
#define SCTP_I_WANT_MAPPED_V4_ADDR SCTP_I_WANT_MAPPED_V4_ADDR
	SCTP_MAXSEG, 	/* Get/set maximum fragment. */
#define SCTP_MAXSEG 	SCTP_MAXSEG
	SCTP_STATUS,
#define SCTP_STATUS SCTP_STATUS
	SCTP_GET_PEER_ADDR_INFO,
#define SCTP_GET_PEER_ADDR_INFO SCTP_GET_PEER_ADDR_INFO
	SCTP_DELAYED_ACK,
#define SCTP_DELAYED_ACK_TIME SCTP_DELAYED_ACK
#define SCTP_DELAYED_ACK SCTP_DELAYED_ACK
	SCTP_CONTEXT,	/* Receive Context */
#define SCTP_CONTEXT SCTP_CONTEXT
	SCTP_FRAGMENT_INTERLEAVE,
#define SCTP_FRAGMENT_INTERLEAVE SCTP_FRAGMENT_INTERLEAVE
	SCTP_PARTIAL_DELIVERY_POINT,	/* Set/Get partial delivery point */
#define SCTP_PARTIAL_DELIVERY_POINT SCTP_PARTIAL_DELIVERY_POINT
	SCTP_MAX_BURST,		/* Set/Get max burst */
#define SCTP_MAX_BURST SCTP_MAX_BURST
	SCTP_AUTH_CHUNK,	/* Set only: add a chunk type to authenticat */
#define SCTP_AUTH_CHUNK SCTP_AUTH_CHUNK
	SCTP_HMAC_IDENT,
#define SCTP_HMAC_IDENT SCTP_HMAC_IDENT
	SCTP_AUTH_KEY,
#define SCTP_AUTH_KEY SCTP_AUTH_KEY
	SCTP_AUTH_ACTIVE_KEY,
#define SCTP_AUTH_ACTIVE_KEY SCTP_AUTH_ACTIVE_KEY
	SCTP_AUTH_DELETE_KEY,
#define SCTP_AUTH_DELETE_KEY SCTP_AUTH_DELETE_KEY
	SCTP_PEER_AUTH_CHUNKS,		/* Read only */
#define SCTP_PEER_AUTH_CHUNKS SCTP_PEER_AUTH_CHUNKS
	SCTP_LOCAL_AUTH_CHUNKS,		/* Read only */
#define SCTP_LOCAL_AUTH_CHUNKS SCTP_LOCAL_AUTH_CHUNKS
	SCTP_GET_ASSOC_NUMBER,		/* Read only */
#define SCTP_GET_ASSOC_NUMBER SCTP_GET_ASSOC_NUMBER


	/* Internal Socket Options. Some of the sctp library functions are 
	 * implemented using these socket options.
	 */
	SCTP_SOCKOPT_BINDX_ADD = 100,/* BINDX requests for adding addresses. */
#define SCTP_SOCKOPT_BINDX_ADD	SCTP_SOCKOPT_BINDX_ADD
	SCTP_SOCKOPT_BINDX_REM, /* BINDX requests for removing addresses. */
#define SCTP_SOCKOPT_BINDX_REM	SCTP_SOCKOPT_BINDX_REM
	SCTP_SOCKOPT_PEELOFF, 	/* peel off association. */
#define SCTP_SOCKOPT_PEELOFF	SCTP_SOCKOPT_PEELOFF
	SCTP_GET_PEER_ADDRS_NUM_OLD, 	/* Get number of peer addresss. */
#define SCTP_GET_PEER_ADDRS_NUM_OLD	SCTP_GET_PEER_ADDRS_NUM_OLD
	SCTP_GET_PEER_ADDRS_OLD, 	/* Get all peer addresss. */
#define SCTP_GET_PEER_ADDRS_OLD	SCTP_GET_PEER_ADDRS_OLD
	SCTP_GET_LOCAL_ADDRS_NUM_OLD, 	/* Get number of local addresss. */
#define SCTP_GET_LOCAL_ADDRS_NUM_OLD	SCTP_GET_LOCAL_ADDRS_NUM_OLD
	SCTP_GET_LOCAL_ADDRS_OLD, 	/* Get all local addresss. */
#define SCTP_GET_LOCAL_ADDRS_OLD	SCTP_GET_LOCAL_ADDRS_OLD
	SCTP_SOCKOPT_CONNECTX_OLD, /* CONNECTX old requests. */
#define SCTP_SOCKOPT_CONNECTX_OLD	SCTP_SOCKOPT_CONNECTX_OLD
	SCTP_GET_PEER_ADDRS, 	/* Get all peer addresss. */
#define SCTP_GET_PEER_ADDRS	SCTP_GET_PEER_ADDRS
	SCTP_GET_LOCAL_ADDRS, 	/* Get all local addresss. */
#define SCTP_GET_LOCAL_ADDRS	SCTP_GET_LOCAL_ADDRS
	SCTP_SOCKOPT_CONNECTX, /* CONNECTX requests. */
#define SCTP_SOCKOPT_CONNECTX	SCTP_SOCKOPT_CONNECTX
	SCTP_SOCKOPT_CONNECTX3, /* CONNECTX requests. (new implementation) */
#define SCTP_SOCKOPT_CONNECTX3	SCTP_SOCKOPT_CONNECTX3
};

/*
 * 5.2.1 SCTP Initiation Structure (SCTP_INIT)
 *
 *   This cmsghdr structure provides information for initializing new
 *   SCTP associations with sendmsg().  The SCTP_INITMSG socket option
 *   uses this same data structure.  This structure is not used for
 *   recvmsg().
 *
 *   cmsg_level    cmsg_type      cmsg_data[]
 *   ------------  ------------   ----------------------
 *   IPPROTO_SCTP  SCTP_INIT      struct sctp_initmsg
 *
 */
struct sctp_initmsg {
	__u16 sinit_num_ostreams;
	__u16 sinit_max_instreams;
	__u16 sinit_max_attempts;
	__u16 sinit_max_init_timeo;
};

/*
 * 5.2.2 SCTP Header Information Structure (SCTP_SNDRCV)
 *
 *   This cmsghdr structure specifies SCTP options for sendmsg() and
 *   describes SCTP header information about a received message through
 *   recvmsg().
 *
 *   cmsg_level    cmsg_type      cmsg_data[]
 *   ------------  ------------   ----------------------
 *   IPPROTO_SCTP  SCTP_SNDRCV    struct sctp_sndrcvinfo
 *
 */
struct sctp_sndrcvinfo {
	__u16 sinfo_stream;
	__u16 sinfo_ssn;
	__u16 sinfo_flags;
	__u32 sinfo_ppid;
	__u32 sinfo_context;
	__u32 sinfo_timetolive;
	__u32 sinfo_tsn;
	__u32 sinfo_cumtsn;
	sctp_assoc_t sinfo_assoc_id;
};

/*
 *  sinfo_flags: 16 bits (unsigned integer)
 *
 *   This field may contain any of the following flags and is composed of
 *   a bitwise OR of these values.
 */

enum sctp_sinfo_flags {
	SCTP_UNORDERED = 1,  /* Send/receive message unordered. */
	SCTP_ADDR_OVER = 2,  /* Override the primary destination. */
	SCTP_ABORT=4,        /* Send an ABORT message to the peer. */
	SCTP_EOF=MSG_FIN,    /* Initiate graceful shutdown process. */	
};


/* These are cmsg_types.  */
typedef enum sctp_cmsg_type {
	SCTP_INIT,              /* 5.2.1 SCTP Initiation Structure */
	SCTP_SNDRCV,            /* 5.2.2 SCTP Header Information Structure */
} sctp_cmsg_t;


/*
 * 5.3.1.1 SCTP_ASSOC_CHANGE
 *
 *   Communication notifications inform the ULP that an SCTP association
 *   has either begun or ended. The identifier for a new association is
 *   provided by this notificaion. The notification information has the
 *   following format:
 *
 */
struct sctp_assoc_change {
	__u16 sac_type;
	__u16 sac_flags;
	__u32 sac_length;
	__u16 sac_state;
	__u16 sac_error;
	__u16 sac_outbound_streams;
	__u16 sac_inbound_streams;
	sctp_assoc_t sac_assoc_id;
	__u8 sac_info[0];
};

/*
 *   sac_state: 32 bits (signed integer)
 *
 *   This field holds one of a number of values that communicate the
 *   event that happened to the association.  They include:
 *
 *   Note:  The following state names deviate from the API draft as
 *   the names clash too easily with other kernel symbols.
 */
enum sctp_sac_state {
	SCTP_COMM_UP,
	SCTP_COMM_LOST,
	SCTP_RESTART,
	SCTP_SHUTDOWN_COMP,
	SCTP_CANT_STR_ASSOC,
};

/*
 * 5.3.1.2 SCTP_PEER_ADDR_CHANGE
 *
 *   When a destination address on a multi-homed peer encounters a change
 *   an interface details event is sent.  The information has the
 *   following structure:
 */
struct sctp_paddr_change {
	__u16 spc_type;
	__u16 spc_flags;
	__u32 spc_length;
	struct sockaddr_storage spc_aaddr;
	int spc_state;
	int spc_error;
	sctp_assoc_t spc_assoc_id;
} __attribute__((packed, aligned(4)));

/*
 *    spc_state:  32 bits (signed integer)
 *
 *   This field holds one of a number of values that communicate the
 *   event that happened to the address.  They include:
 */
enum sctp_spc_state {
	SCTP_ADDR_AVAILABLE,
	SCTP_ADDR_UNREACHABLE,
	SCTP_ADDR_REMOVED,
	SCTP_ADDR_ADDED,
	SCTP_ADDR_MADE_PRIM,
	SCTP_ADDR_CONFIRMED,
};


/*
 * 5.3.1.3 SCTP_REMOTE_ERROR
 *
 *   A remote peer may send an Operational Error message to its peer.
 *   This message indicates a variety of error conditions on an
 *   association. The entire error TLV as it appears on the wire is
 *   included in a SCTP_REMOTE_ERROR event.  Please refer to the SCTP
 *   specification [SCTP] and any extensions for a list of possible
 *   error formats. SCTP error TLVs have the format:
 */
struct sctp_remote_error {
	__u16 sre_type;
	__u16 sre_flags;
	__u32 sre_length;
	__u16 sre_error;
	sctp_assoc_t sre_assoc_id;
	__u8 sre_data[0];
};


/*
 * 5.3.1.4 SCTP_SEND_FAILED
 *
 *   If SCTP cannot deliver a message it may return the message as a
 *   notification.
 */
struct sctp_send_failed {
	__u16 ssf_type;
	__u16 ssf_flags;
	__u32 ssf_length;
	__u32 ssf_error;
	struct sctp_sndrcvinfo ssf_info;
	sctp_assoc_t ssf_assoc_id;
	__u8 ssf_data[0];
};

/*
 *   ssf_flags: 16 bits (unsigned integer)
 *
 *   The flag value will take one of the following values
 *
 *   SCTP_DATA_UNSENT  - Indicates that the data was never put on
 *                       the wire.
 *
 *   SCTP_DATA_SENT    - Indicates that the data was put on the wire.
 *                       Note that this does not necessarily mean that the
 *                       data was (or was not) successfully delivered.
 */
enum sctp_ssf_flags {
	SCTP_DATA_UNSENT,
	SCTP_DATA_SENT,
};

/*
 * 5.3.1.5 SCTP_SHUTDOWN_EVENT
 *
 *   When a peer sends a SHUTDOWN, SCTP delivers this notification to
 *   inform the application that it should cease sending data.
 */
struct sctp_shutdown_event {
	__u16 sse_type;
	__u16 sse_flags;
	__u32 sse_length;
	sctp_assoc_t sse_assoc_id;
};

/*
 * 5.3.1.6 SCTP_ADAPTATION_INDICATION
 *
 *   When a peer sends a Adaptation Layer Indication parameter , SCTP
 *   delivers this notification to inform the application
 *   that of the peers requested adaptation layer.
 */
struct sctp_adaptation_event {
	__u16 sai_type;
	__u16 sai_flags;
	__u32 sai_length;
	__u32 sai_adaptation_ind;
	sctp_assoc_t sai_assoc_id;
};

/*
 * 5.3.1.7 SCTP_PARTIAL_DELIVERY_EVENT
 *
 *   When a receiver is engaged in a partial delivery of a
 *   message this notification will be used to indicate
 *   various events.
 */
struct sctp_pdapi_event {
	__u16 pdapi_type;
	__u16 pdapi_flags;
	__u32 pdapi_length;
	__u32 pdapi_indication;
	sctp_assoc_t pdapi_assoc_id;
};

enum { SCTP_PARTIAL_DELIVERY_ABORTED=0, };

struct sctp_authkey_event {
	__u16 auth_type;
	__u16 auth_flags;
	__u32 auth_length;
	__u16 auth_keynumber;
	__u16 auth_altkeynumber;
	__u32 auth_indication;
	sctp_assoc_t auth_assoc_id;
};

enum { SCTP_AUTH_NEWKEY = 0, };


/*
 * Described in Section 7.3
 *   Ancillary Data and Notification Interest Options
 */
struct sctp_event_subscribe {
	__u8 sctp_data_io_event;
	__u8 sctp_association_event;
	__u8 sctp_address_event;
	__u8 sctp_send_failure_event;
	__u8 sctp_peer_error_event;
	__u8 sctp_shutdown_event;
	__u8 sctp_partial_delivery_event;
	__u8 sctp_adaptation_layer_event;
	__u8 sctp_authentication_event;
};

/*
 * 5.3.1 SCTP Notification Structure
 *
 *   The notification structure is defined as the union of all
 *   notification types.
 *
 */
union sctp_notification {
	struct {
		__u16 sn_type;             /* Notification type. */
		__u16 sn_flags;
		__u32 sn_length;
	} sn_header;
	struct sctp_assoc_change sn_assoc_change;
	struct sctp_paddr_change sn_paddr_change;
	struct sctp_remote_error sn_remote_error;
	struct sctp_send_failed sn_send_failed;
	struct sctp_shutdown_event sn_shutdown_event;
	struct sctp_adaptation_event sn_adaptation_event;
	struct sctp_pdapi_event sn_pdapi_event;
	struct sctp_authkey_event sn_authkey_event;
};

/* Section 5.3.1
 * All standard values for sn_type flags are greater than 2^15.
 * Values from 2^15 and down are reserved.
 */

enum sctp_sn_type {
	SCTP_SN_TYPE_BASE     = (1<<15),
	SCTP_ASSOC_CHANGE,
	SCTP_PEER_ADDR_CHANGE,
	SCTP_SEND_FAILED,
	SCTP_REMOTE_ERROR,
	SCTP_SHUTDOWN_EVENT,
	SCTP_PARTIAL_DELIVERY_EVENT,
	SCTP_ADAPTATION_INDICATION,
	SCTP_AUTHENTICATION_INDICATION,
};

/* Notification error codes used to fill up the error fields in some
 * notifications.
 * SCTP_PEER_ADDRESS_CHAGE 	: spc_error
 * SCTP_ASSOC_CHANGE		: sac_error
 * These names should be potentially included in the draft 04 of the SCTP
 * sockets API specification.
 */
typedef enum sctp_sn_error {
	SCTP_FAILED_THRESHOLD,
	SCTP_RECEIVED_SACK,
	SCTP_HEARTBEAT_SUCCESS,
	SCTP_RESPONSE_TO_USER_REQ,
	SCTP_INTERNAL_ERROR,
	SCTP_SHUTDOWN_GUARD_EXPIRES,
	SCTP_PEER_FAULTY,
} sctp_sn_error_t;

/*
 * 7.1.1 Retransmission Timeout Parameters (SCTP_RTOINFO)
 *
 *   The protocol parameters used to initialize and bound retransmission
 *   timeout (RTO) are tunable.  See [SCTP] for more information on how
 *   these parameters are used in RTO calculation. 
 */
struct sctp_rtoinfo {
	sctp_assoc_t	srto_assoc_id;
	__u32		srto_initial;
	__u32		srto_max;
	__u32		srto_min;
};

/*
 * 7.1.2 Association Parameters (SCTP_ASSOCINFO)
 *
 *   This option is used to both examine and set various association and
 *   endpoint parameters.
 */
struct sctp_assocparams {
	sctp_assoc_t	sasoc_assoc_id;
	__u16		sasoc_asocmaxrxt;
	__u16		sasoc_number_peer_destinations;
	__u32		sasoc_peer_rwnd;
	__u32		sasoc_local_rwnd;
	__u32		sasoc_cookie_life;
};

/*
 * 7.1.9 Set Peer Primary Address (SCTP_SET_PEER_PRIMARY_ADDR)
 *
 *  Requests that the peer mark the enclosed address as the association
 *  primary. The enclosed address must be one of the association's
 *  locally bound addresses. The following structure is used to make a
 *   set primary request:
 */
struct sctp_setpeerprim {
	sctp_assoc_t            sspp_assoc_id;
	struct sockaddr_storage sspp_addr;
} __attribute__((packed, aligned(4)));

/*
 * 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR)
 *
 *  Requests that the local SCTP stack use the enclosed peer address as
 *  the association primary. The enclosed address must be one of the
 *  association peer's addresses. The following structure is used to
 *  make a set peer primary request:
 */
struct sctp_prim {
	sctp_assoc_t            ssp_assoc_id;
	struct sockaddr_storage ssp_addr;
} __attribute__((packed, aligned(4)));

/*
 * 7.1.11 Set Adaptation Layer Indicator (SCTP_ADAPTATION_LAYER)
 *
 * Requests that the local endpoint set the specified Adaptation Layer
 * Indication parameter for all future INIT and INIT-ACK exchanges.
 */
struct sctp_setadaptation {
	__u32	ssb_adaptation_ind;
};

/*
 * 7.1.13 Peer Address Parameters  (SCTP_PEER_ADDR_PARAMS)
 *
 *   Applications can enable or disable heartbeats for any peer address
 *   of an association, modify an address's heartbeat interval, force a
 *   heartbeat to be sent immediately, and adjust the address's maximum
 *   number of retransmissions sent before an address is considered
 *   unreachable. The following structure is used to access and modify an
 *   address's parameters:
 */
enum  sctp_spp_flags {
	SPP_HB_ENABLE = 1<<0,		/*Enable heartbeats*/
	SPP_HB_DISABLE = 1<<1,		/*Disable heartbeats*/
	SPP_HB = SPP_HB_ENABLE | SPP_HB_DISABLE,
	SPP_HB_DEMAND = 1<<2,		/*Send heartbeat immediately*/
	SPP_PMTUD_ENABLE = 1<<3,	/*Enable PMTU discovery*/
	SPP_PMTUD_DISABLE = 1<<4,	/*Disable PMTU discovery*/
	SPP_PMTUD = SPP_PMTUD_ENABLE | SPP_PMTUD_DISABLE,
	SPP_SACKDELAY_ENABLE = 1<<5,	/*Enable SACK*/
	SPP_SACKDELAY_DISABLE = 1<<6,	/*Disable SACK*/
	SPP_SACKDELAY = SPP_SACKDELAY_ENABLE | SPP_SACKDELAY_DISABLE,
	SPP_HB_TIME_IS_ZERO = 1<<7,	/* Set HB delay to 0 */
};

struct sctp_paddrparams {
	sctp_assoc_t		spp_assoc_id;
	struct sockaddr_storage	spp_address;
	__u32			spp_hbinterval;
	__u16			spp_pathmaxrxt;
	__u32			spp_pathmtu;
	__u32			spp_sackdelay;
	__u32			spp_flags;
} __attribute__((packed, aligned(4)));

/*
 * 7.1.18.  Add a chunk that must be authenticated (SCTP_AUTH_CHUNK)
 *
 * This set option adds a chunk type that the user is requesting to be
 * received only in an authenticated way.  Changes to the list of chunks
 * will only effect future associations on the socket.
 */
struct sctp_authchunk {
	__u8		sauth_chunk;
};

/*
 * 7.1.19.  Get or set the list of supported HMAC Identifiers (SCTP_HMAC_IDENT)
 *
 * This option gets or sets the list of HMAC algorithms that the local
 * endpoint requires the peer to use.
*/
struct sctp_hmacalgo {
	__u32		shmac_num_idents;
	__u16		shmac_idents[];
};

/*
 * 7.1.20.  Set a shared key (SCTP_AUTH_KEY)
 *
 * This option will set a shared secret key which is used to build an
 * association shared key.
 */
struct sctp_authkey {
	sctp_assoc_t	sca_assoc_id;
	__u16		sca_keynumber;
	__u16		sca_keylength;
	__u8		sca_key[];
};

/*
 * 7.1.21.  Get or set the active shared key (SCTP_AUTH_ACTIVE_KEY)
 *
 * This option will get or set the active shared key to be used to build
 * the association shared key.
 */

struct sctp_authkeyid {
	sctp_assoc_t	scact_assoc_id;
	__u16		scact_keynumber;
};


/*
 * 7.1.23.  Get or set delayed ack timer (SCTP_DELAYED_SACK)
 *
 * This option will effect the way delayed acks are performed.  This
 * option allows you to get or set the delayed ack time, in
 * milliseconds.  It also allows changing the delayed ack frequency.
 * Changing the frequency to 1 disables the delayed sack algorithm.  If
 * the assoc_id is 0, then this sets or gets the endpoints default
 * values.  If the assoc_id field is non-zero, then the set or get
 * effects the specified association for the one to many model (the
 * assoc_id field is ignored by the one to one model).  Note that if
 * sack_delay or sack_freq are 0 when setting this option, then the
 * current values will remain unchanged.
 */
struct sctp_sack_info {
	sctp_assoc_t	sack_assoc_id;
	uint32_t	sack_delay;
	uint32_t	sack_freq;
};

struct sctp_assoc_value {
    sctp_assoc_t            assoc_id;
    uint32_t                assoc_value;
};

/*
 * 7.2.2 Peer Address Information
 *
 *   Applications can retrieve information about a specific peer address
 *   of an association, including its reachability state, congestion
 *   window, and retransmission timer values.  This information is
 *   read-only. The following structure is used to access this
 *   information:
 */
struct sctp_paddrinfo {
	sctp_assoc_t		spinfo_assoc_id;
	struct sockaddr_storage	spinfo_address;
	__s32			spinfo_state;
	__u32			spinfo_cwnd;
	__u32			spinfo_srtt;
	__u32			spinfo_rto;
	__u32			spinfo_mtu;
} __attribute__((packed, aligned(4)));

/* Peer addresses's state. */
/* UNKNOWN: Peer address passed by the upper layer in sendmsg or connect[x]
 * calls.
 * UNCONFIRMED: Peer address received in INIT/INIT-ACK address parameters.
 *              Not yet confirmed by a heartbeat and not available for data
 *		transfers.
 * ACTIVE : Peer address confirmed, active and available for data transfers.
 * INACTIVE: Peer address inactive and not available for data transfers.
 */
enum sctp_spinfo_state {
	SCTP_INACTIVE,
	SCTP_ACTIVE,
	SCTP_UNCONFIRMED,
	SCTP_UNKNOWN = 0xffff  /* Value used for transport state unknown */
};

/*
 * 7.2.1 Association Status (SCTP_STATUS)
 *
 *   Applications can retrieve current status information about an
 *   association, including association state, peer receiver window size,
 *   number of unacked data chunks, and number of data chunks pending
 *   receipt.  This information is read-only.  The following structure is
 *   used to access this information:
 */
struct sctp_status {
	sctp_assoc_t		sstat_assoc_id;
	__s32			sstat_state;
	__u32			sstat_rwnd;
	__u16			sstat_unackdata;
	__u16			sstat_penddata;
	__u16			sstat_instrms;
	__u16			sstat_outstrms;
	__u32			sstat_fragmentation_point;
	struct sctp_paddrinfo	sstat_primary;
};

/*
 * 7.2.3.  Get the list of chunks the peer requires to be authenticated
 *         (SCTP_PEER_AUTH_CHUNKS)
 *
 * This option gets a list of chunks for a specified association that
 * the peer requires to be received authenticated only.
 */
struct sctp_authchunks {
	sctp_assoc_t	gauth_assoc_id;
	__u32		gauth_number_of_chunks;
	uint8_t		gauth_chunks[];
};

/*
 * 8.3, 8.5 get all peer/local addresses in an association.
 * This parameter struct is used by SCTP_GET_PEER_ADDRS and 
 * SCTP_GET_LOCAL_ADDRS socket options used internally to implement
 * sctp_getpaddrs() and sctp_getladdrs() API. 
 */
struct sctp_getaddrs_old {
	sctp_assoc_t            assoc_id;
	int			addr_num;
	struct sockaddr		__user *addrs;
};
struct sctp_getaddrs {
	sctp_assoc_t		assoc_id; /*input*/
	__u32			addr_num; /*output*/
	__u8			addrs[0]; /*output, variable size*/
};

/* These are bit fields for msghdr->msg_flags.  See section 5.1.  */
/* On user space Linux, these live in <bits/socket.h> as an enum.  */
enum sctp_msg_flags {
	MSG_NOTIFICATION = 0x8000,
#define MSG_NOTIFICATION MSG_NOTIFICATION
};

/*
 * 8.1 sctp_bindx()
 *
 * The flags parameter is formed from the bitwise OR of zero or more of the
 * following currently defined flags:
 */
#define SCTP_BINDX_ADD_ADDR 0x01
#define SCTP_BINDX_REM_ADDR 0x02

/* This is the structure that is passed as an argument(optval) to
 * getsockopt(SCTP_SOCKOPT_PEELOFF).
 */
typedef struct {
	sctp_assoc_t associd;
	int sd;
} sctp_peeloff_arg_t;

#endif /* __net_sctp_user_h__ */
OpenPOWER on IntegriCloud