1 /* SCTP kernel implementation
2 * (C) Copyright IBM Corp. 2001, 2004
3 * Copyright (c) 1999-2000 Cisco, Inc.
4 * Copyright (c) 1999-2001 Motorola, Inc.
5 * Copyright (c) 2002 Intel Corp.
7 * This file is part of the SCTP kernel implementation
9 * This header represents the structures and constants needed to support
10 * the SCTP Extension to the Sockets API.
12 * This SCTP implementation is free software;
13 * you can redistribute it and/or modify it under the terms of
14 * the GNU General Public License as published by
15 * the Free Software Foundation; either version 2, or (at your option)
18 * This SCTP implementation is distributed in the hope that it
19 * will be useful, but WITHOUT ANY WARRANTY; without even the implied
20 * ************************
21 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
22 * See the GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with GNU CC; see the file COPYING. If not, see
26 * <http://www.gnu.org/licenses/>.
28 * Please send any bug reports or fixes you make to the
30 * lksctp developers <linux-sctp@vger.kernel.org>
32 * Or submit a bug report through the following website:
33 * http://www.sf.net/projects/lksctp
35 * Written or modified by:
36 * La Monte H.P. Yarroll <piggy@acm.org>
37 * R. Stewart <randall@sctp.chicago.il.us>
38 * K. Morneau <kmorneau@cisco.com>
39 * Q. Xie <qxie1@email.mot.com>
40 * Karl Knutson <karl@athena.chicago.il.us>
41 * Jon Grimm <jgrimm@us.ibm.com>
42 * Daisy Chang <daisyc@us.ibm.com>
43 * Ryan Layer <rmlayer@us.ibm.com>
44 * Ardelle Fan <ardelle.fan@intel.com>
45 * Sridhar Samudrala <sri@us.ibm.com>
46 * Inaky Perez-Gonzalez <inaky.gonzalez@intel.com>
47 * Vlad Yasevich <vladislav.yasevich@hp.com>
49 * Any bugs reported given to us we will try to fix... any fixes shared will
50 * be incorporated into the next SCTP release.
56 #include <linux/types.h>
57 #include <linux/socket.h>
59 typedef __s32 sctp_assoc_t;
61 /* The following symbols come from the Sockets API Extensions for
62 * SCTP <draft-ietf-tsvwg-sctpsocket-07.txt>.
64 #define SCTP_RTOINFO 0
65 #define SCTP_ASSOCINFO 1
66 #define SCTP_INITMSG 2
67 #define SCTP_NODELAY 3 /* Get/set nodelay option. */
68 #define SCTP_AUTOCLOSE 4
69 #define SCTP_SET_PEER_PRIMARY_ADDR 5
70 #define SCTP_PRIMARY_ADDR 6
71 #define SCTP_ADAPTATION_LAYER 7
72 #define SCTP_DISABLE_FRAGMENTS 8
73 #define SCTP_PEER_ADDR_PARAMS 9
74 #define SCTP_DEFAULT_SEND_PARAM 10
75 #define SCTP_EVENTS 11
76 #define SCTP_I_WANT_MAPPED_V4_ADDR 12 /* Turn on/off mapped v4 addresses */
77 #define SCTP_MAXSEG 13 /* Get/set maximum fragment. */
78 #define SCTP_STATUS 14
79 #define SCTP_GET_PEER_ADDR_INFO 15
80 #define SCTP_DELAYED_ACK_TIME 16
81 #define SCTP_DELAYED_ACK SCTP_DELAYED_ACK_TIME
82 #define SCTP_DELAYED_SACK SCTP_DELAYED_ACK_TIME
83 #define SCTP_CONTEXT 17
84 #define SCTP_FRAGMENT_INTERLEAVE 18
85 #define SCTP_PARTIAL_DELIVERY_POINT 19 /* Set/Get partial delivery point */
86 #define SCTP_MAX_BURST 20 /* Set/Get max burst */
87 #define SCTP_AUTH_CHUNK 21 /* Set only: add a chunk type to authenticate */
88 #define SCTP_HMAC_IDENT 22
89 #define SCTP_AUTH_KEY 23
90 #define SCTP_AUTH_ACTIVE_KEY 24
91 #define SCTP_AUTH_DELETE_KEY 25
92 #define SCTP_PEER_AUTH_CHUNKS 26 /* Read only */
93 #define SCTP_LOCAL_AUTH_CHUNKS 27 /* Read only */
94 #define SCTP_GET_ASSOC_NUMBER 28 /* Read only */
95 #define SCTP_GET_ASSOC_ID_LIST 29 /* Read only */
96 #define SCTP_AUTO_ASCONF 30
97 #define SCTP_PEER_ADDR_THLDS 31
98 #define SCTP_RECVRCVINFO 32
99 #define SCTP_RECVNXTINFO 33
100 #define SCTP_DEFAULT_SNDINFO 34
102 /* Internal Socket Options. Some of the sctp library functions are
103 * implemented using these socket options.
105 #define SCTP_SOCKOPT_BINDX_ADD 100 /* BINDX requests for adding addrs */
106 #define SCTP_SOCKOPT_BINDX_REM 101 /* BINDX requests for removing addrs. */
107 #define SCTP_SOCKOPT_PEELOFF 102 /* peel off association. */
108 /* Options 104-106 are deprecated and removed. Do not use this space */
109 #define SCTP_SOCKOPT_CONNECTX_OLD 107 /* CONNECTX old requests. */
110 #define SCTP_GET_PEER_ADDRS 108 /* Get all peer address. */
111 #define SCTP_GET_LOCAL_ADDRS 109 /* Get all local address. */
112 #define SCTP_SOCKOPT_CONNECTX 110 /* CONNECTX requests. */
113 #define SCTP_SOCKOPT_CONNECTX3 111 /* CONNECTX requests (updated) */
114 #define SCTP_GET_ASSOC_STATS 112 /* Read only */
115 #define SCTP_PR_SUPPORTED 113
116 #define SCTP_DEFAULT_PRINFO 114
117 #define SCTP_PR_ASSOC_STATUS 115
118 #define SCTP_ENABLE_STREAM_RESET 118
120 /* PR-SCTP policies */
121 #define SCTP_PR_SCTP_NONE 0x0000
122 #define SCTP_PR_SCTP_TTL 0x0010
123 #define SCTP_PR_SCTP_RTX 0x0020
124 #define SCTP_PR_SCTP_PRIO 0x0030
125 #define SCTP_PR_SCTP_MAX SCTP_PR_SCTP_PRIO
126 #define SCTP_PR_SCTP_MASK 0x0030
128 #define __SCTP_PR_INDEX(x) ((x >> 4) - 1)
129 #define SCTP_PR_INDEX(x) __SCTP_PR_INDEX(SCTP_PR_SCTP_ ## x)
131 #define SCTP_PR_POLICY(x) ((x) & SCTP_PR_SCTP_MASK)
132 #define SCTP_PR_SET_POLICY(flags, x) \
134 flags &= ~SCTP_PR_SCTP_MASK; \
138 #define SCTP_PR_TTL_ENABLED(x) (SCTP_PR_POLICY(x) == SCTP_PR_SCTP_TTL)
139 #define SCTP_PR_RTX_ENABLED(x) (SCTP_PR_POLICY(x) == SCTP_PR_SCTP_RTX)
140 #define SCTP_PR_PRIO_ENABLED(x) (SCTP_PR_POLICY(x) == SCTP_PR_SCTP_PRIO)
142 /* For enable stream reset */
143 #define SCTP_ENABLE_RESET_STREAM_REQ 0x01
144 #define SCTP_ENABLE_RESET_ASSOC_REQ 0x02
145 #define SCTP_ENABLE_CHANGE_ASSOC_REQ 0x04
146 #define SCTP_ENABLE_STRRESET_MASK 0x07
148 /* These are bit fields for msghdr->msg_flags. See section 5.1. */
149 /* On user space Linux, these live in <bits/socket.h> as an enum. */
150 enum sctp_msg_flags {
151 MSG_NOTIFICATION = 0x8000,
152 #define MSG_NOTIFICATION MSG_NOTIFICATION
155 /* 5.3.1 SCTP Initiation Structure (SCTP_INIT)
157 * This cmsghdr structure provides information for initializing new
158 * SCTP associations with sendmsg(). The SCTP_INITMSG socket option
159 * uses this same data structure. This structure is not used for
162 * cmsg_level cmsg_type cmsg_data[]
163 * ------------ ------------ ----------------------
164 * IPPROTO_SCTP SCTP_INIT struct sctp_initmsg
166 struct sctp_initmsg {
167 __u16 sinit_num_ostreams;
168 __u16 sinit_max_instreams;
169 __u16 sinit_max_attempts;
170 __u16 sinit_max_init_timeo;
173 /* 5.3.2 SCTP Header Information Structure (SCTP_SNDRCV)
175 * This cmsghdr structure specifies SCTP options for sendmsg() and
176 * describes SCTP header information about a received message through
179 * cmsg_level cmsg_type cmsg_data[]
180 * ------------ ------------ ----------------------
181 * IPPROTO_SCTP SCTP_SNDRCV struct sctp_sndrcvinfo
183 struct sctp_sndrcvinfo {
189 __u32 sinfo_timetolive;
192 sctp_assoc_t sinfo_assoc_id;
195 /* 5.3.4 SCTP Send Information Structure (SCTP_SNDINFO)
197 * This cmsghdr structure specifies SCTP options for sendmsg().
199 * cmsg_level cmsg_type cmsg_data[]
200 * ------------ ------------ -------------------
201 * IPPROTO_SCTP SCTP_SNDINFO struct sctp_sndinfo
203 struct sctp_sndinfo {
208 sctp_assoc_t snd_assoc_id;
211 /* 5.3.5 SCTP Receive Information Structure (SCTP_RCVINFO)
213 * This cmsghdr structure describes SCTP receive information
214 * about a received message through recvmsg().
216 * cmsg_level cmsg_type cmsg_data[]
217 * ------------ ------------ -------------------
218 * IPPROTO_SCTP SCTP_RCVINFO struct sctp_rcvinfo
220 struct sctp_rcvinfo {
228 sctp_assoc_t rcv_assoc_id;
231 /* 5.3.6 SCTP Next Receive Information Structure (SCTP_NXTINFO)
233 * This cmsghdr structure describes SCTP receive information
234 * of the next message that will be delivered through recvmsg()
235 * if this information is already available when delivering
236 * the current message.
238 * cmsg_level cmsg_type cmsg_data[]
239 * ------------ ------------ -------------------
240 * IPPROTO_SCTP SCTP_NXTINFO struct sctp_nxtinfo
242 struct sctp_nxtinfo {
247 sctp_assoc_t nxt_assoc_id;
251 * sinfo_flags: 16 bits (unsigned integer)
253 * This field may contain any of the following flags and is composed of
254 * a bitwise OR of these values.
256 enum sctp_sinfo_flags {
257 SCTP_UNORDERED = (1 << 0), /* Send/receive message unordered. */
258 SCTP_ADDR_OVER = (1 << 1), /* Override the primary destination. */
259 SCTP_ABORT = (1 << 2), /* Send an ABORT message to the peer. */
260 SCTP_SACK_IMMEDIATELY = (1 << 3), /* SACK should be sent without delay. */
261 SCTP_NOTIFICATION = MSG_NOTIFICATION, /* Next message is not user msg but notification. */
262 SCTP_EOF = MSG_FIN, /* Initiate graceful shutdown process. */
267 struct sctp_initmsg init;
268 struct sctp_sndrcvinfo sndrcv;
271 /* These are cmsg_types. */
272 typedef enum sctp_cmsg_type {
273 SCTP_INIT, /* 5.2.1 SCTP Initiation Structure */
274 #define SCTP_INIT SCTP_INIT
275 SCTP_SNDRCV, /* 5.2.2 SCTP Header Information Structure */
276 #define SCTP_SNDRCV SCTP_SNDRCV
277 SCTP_SNDINFO, /* 5.3.4 SCTP Send Information Structure */
278 #define SCTP_SNDINFO SCTP_SNDINFO
279 SCTP_RCVINFO, /* 5.3.5 SCTP Receive Information Structure */
280 #define SCTP_RCVINFO SCTP_RCVINFO
281 SCTP_NXTINFO, /* 5.3.6 SCTP Next Receive Information Structure */
282 #define SCTP_NXTINFO SCTP_NXTINFO
286 * 5.3.1.1 SCTP_ASSOC_CHANGE
288 * Communication notifications inform the ULP that an SCTP association
289 * has either begun or ended. The identifier for a new association is
290 * provided by this notificaion. The notification information has the
294 struct sctp_assoc_change {
300 __u16 sac_outbound_streams;
301 __u16 sac_inbound_streams;
302 sctp_assoc_t sac_assoc_id;
307 * sac_state: 32 bits (signed integer)
309 * This field holds one of a number of values that communicate the
310 * event that happened to the association. They include:
312 * Note: The following state names deviate from the API draft as
313 * the names clash too easily with other kernel symbols.
315 enum sctp_sac_state {
324 * 5.3.1.2 SCTP_PEER_ADDR_CHANGE
326 * When a destination address on a multi-homed peer encounters a change
327 * an interface details event is sent. The information has the
328 * following structure:
330 struct sctp_paddr_change {
334 struct sockaddr_storage spc_aaddr;
337 sctp_assoc_t spc_assoc_id;
338 } __attribute__((packed, aligned(4)));
341 * spc_state: 32 bits (signed integer)
343 * This field holds one of a number of values that communicate the
344 * event that happened to the address. They include:
346 enum sctp_spc_state {
348 SCTP_ADDR_UNREACHABLE,
357 * 5.3.1.3 SCTP_REMOTE_ERROR
359 * A remote peer may send an Operational Error message to its peer.
360 * This message indicates a variety of error conditions on an
361 * association. The entire error TLV as it appears on the wire is
362 * included in a SCTP_REMOTE_ERROR event. Please refer to the SCTP
363 * specification [SCTP] and any extensions for a list of possible
364 * error formats. SCTP error TLVs have the format:
366 struct sctp_remote_error {
371 sctp_assoc_t sre_assoc_id;
377 * 5.3.1.4 SCTP_SEND_FAILED
379 * If SCTP cannot deliver a message it may return the message as a
382 struct sctp_send_failed {
387 struct sctp_sndrcvinfo ssf_info;
388 sctp_assoc_t ssf_assoc_id;
393 * ssf_flags: 16 bits (unsigned integer)
395 * The flag value will take one of the following values
397 * SCTP_DATA_UNSENT - Indicates that the data was never put on
400 * SCTP_DATA_SENT - Indicates that the data was put on the wire.
401 * Note that this does not necessarily mean that the
402 * data was (or was not) successfully delivered.
404 enum sctp_ssf_flags {
410 * 5.3.1.5 SCTP_SHUTDOWN_EVENT
412 * When a peer sends a SHUTDOWN, SCTP delivers this notification to
413 * inform the application that it should cease sending data.
415 struct sctp_shutdown_event {
419 sctp_assoc_t sse_assoc_id;
423 * 5.3.1.6 SCTP_ADAPTATION_INDICATION
425 * When a peer sends a Adaptation Layer Indication parameter , SCTP
426 * delivers this notification to inform the application
427 * that of the peers requested adaptation layer.
429 struct sctp_adaptation_event {
433 __u32 sai_adaptation_ind;
434 sctp_assoc_t sai_assoc_id;
438 * 5.3.1.7 SCTP_PARTIAL_DELIVERY_EVENT
440 * When a receiver is engaged in a partial delivery of a
441 * message this notification will be used to indicate
444 struct sctp_pdapi_event {
448 __u32 pdapi_indication;
449 sctp_assoc_t pdapi_assoc_id;
452 enum { SCTP_PARTIAL_DELIVERY_ABORTED=0, };
455 * 5.3.1.8. SCTP_AUTHENTICATION_EVENT
457 * When a receiver is using authentication this message will provide
458 * notifications regarding new keys being made active as well as errors.
460 struct sctp_authkey_event {
464 __u16 auth_keynumber;
465 __u16 auth_altkeynumber;
466 __u32 auth_indication;
467 sctp_assoc_t auth_assoc_id;
470 enum { SCTP_AUTH_NEWKEY = 0, };
473 * 6.1.9. SCTP_SENDER_DRY_EVENT
475 * When the SCTP stack has no more user data to send or retransmit, this
476 * notification is given to the user. Also, at the time when a user app
477 * subscribes to this event, if there is no data to be sent or
478 * retransmit, the stack will immediately send up this notification.
480 struct sctp_sender_dry_event {
481 __u16 sender_dry_type;
482 __u16 sender_dry_flags;
483 __u32 sender_dry_length;
484 sctp_assoc_t sender_dry_assoc_id;
488 * Described in Section 7.3
489 * Ancillary Data and Notification Interest Options
491 struct sctp_event_subscribe {
492 __u8 sctp_data_io_event;
493 __u8 sctp_association_event;
494 __u8 sctp_address_event;
495 __u8 sctp_send_failure_event;
496 __u8 sctp_peer_error_event;
497 __u8 sctp_shutdown_event;
498 __u8 sctp_partial_delivery_event;
499 __u8 sctp_adaptation_layer_event;
500 __u8 sctp_authentication_event;
501 __u8 sctp_sender_dry_event;
505 * 5.3.1 SCTP Notification Structure
507 * The notification structure is defined as the union of all
508 * notification types.
511 union sctp_notification {
513 __u16 sn_type; /* Notification type. */
517 struct sctp_assoc_change sn_assoc_change;
518 struct sctp_paddr_change sn_paddr_change;
519 struct sctp_remote_error sn_remote_error;
520 struct sctp_send_failed sn_send_failed;
521 struct sctp_shutdown_event sn_shutdown_event;
522 struct sctp_adaptation_event sn_adaptation_event;
523 struct sctp_pdapi_event sn_pdapi_event;
524 struct sctp_authkey_event sn_authkey_event;
525 struct sctp_sender_dry_event sn_sender_dry_event;
529 * All standard values for sn_type flags are greater than 2^15.
530 * Values from 2^15 and down are reserved.
534 SCTP_SN_TYPE_BASE = (1<<15),
536 #define SCTP_ASSOC_CHANGE SCTP_ASSOC_CHANGE
537 SCTP_PEER_ADDR_CHANGE,
538 #define SCTP_PEER_ADDR_CHANGE SCTP_PEER_ADDR_CHANGE
540 #define SCTP_SEND_FAILED SCTP_SEND_FAILED
542 #define SCTP_REMOTE_ERROR SCTP_REMOTE_ERROR
544 #define SCTP_SHUTDOWN_EVENT SCTP_SHUTDOWN_EVENT
545 SCTP_PARTIAL_DELIVERY_EVENT,
546 #define SCTP_PARTIAL_DELIVERY_EVENT SCTP_PARTIAL_DELIVERY_EVENT
547 SCTP_ADAPTATION_INDICATION,
548 #define SCTP_ADAPTATION_INDICATION SCTP_ADAPTATION_INDICATION
549 SCTP_AUTHENTICATION_EVENT,
550 #define SCTP_AUTHENTICATION_INDICATION SCTP_AUTHENTICATION_EVENT
551 SCTP_SENDER_DRY_EVENT,
552 #define SCTP_SENDER_DRY_EVENT SCTP_SENDER_DRY_EVENT
555 /* Notification error codes used to fill up the error fields in some
557 * SCTP_PEER_ADDRESS_CHAGE : spc_error
558 * SCTP_ASSOC_CHANGE : sac_error
559 * These names should be potentially included in the draft 04 of the SCTP
560 * sockets API specification.
562 typedef enum sctp_sn_error {
563 SCTP_FAILED_THRESHOLD,
565 SCTP_HEARTBEAT_SUCCESS,
566 SCTP_RESPONSE_TO_USER_REQ,
568 SCTP_SHUTDOWN_GUARD_EXPIRES,
573 * 7.1.1 Retransmission Timeout Parameters (SCTP_RTOINFO)
575 * The protocol parameters used to initialize and bound retransmission
576 * timeout (RTO) are tunable. See [SCTP] for more information on how
577 * these parameters are used in RTO calculation.
579 struct sctp_rtoinfo {
580 sctp_assoc_t srto_assoc_id;
587 * 7.1.2 Association Parameters (SCTP_ASSOCINFO)
589 * This option is used to both examine and set various association and
590 * endpoint parameters.
592 struct sctp_assocparams {
593 sctp_assoc_t sasoc_assoc_id;
594 __u16 sasoc_asocmaxrxt;
595 __u16 sasoc_number_peer_destinations;
596 __u32 sasoc_peer_rwnd;
597 __u32 sasoc_local_rwnd;
598 __u32 sasoc_cookie_life;
602 * 7.1.9 Set Peer Primary Address (SCTP_SET_PEER_PRIMARY_ADDR)
604 * Requests that the peer mark the enclosed address as the association
605 * primary. The enclosed address must be one of the association's
606 * locally bound addresses. The following structure is used to make a
607 * set primary request:
609 struct sctp_setpeerprim {
610 sctp_assoc_t sspp_assoc_id;
611 struct sockaddr_storage sspp_addr;
612 } __attribute__((packed, aligned(4)));
615 * 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR)
617 * Requests that the local SCTP stack use the enclosed peer address as
618 * the association primary. The enclosed address must be one of the
619 * association peer's addresses. The following structure is used to
620 * make a set peer primary request:
623 sctp_assoc_t ssp_assoc_id;
624 struct sockaddr_storage ssp_addr;
625 } __attribute__((packed, aligned(4)));
627 /* For backward compatibility use, define the old name too */
628 #define sctp_setprim sctp_prim
631 * 7.1.11 Set Adaptation Layer Indicator (SCTP_ADAPTATION_LAYER)
633 * Requests that the local endpoint set the specified Adaptation Layer
634 * Indication parameter for all future INIT and INIT-ACK exchanges.
636 struct sctp_setadaptation {
637 __u32 ssb_adaptation_ind;
641 * 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS)
643 * Applications can enable or disable heartbeats for any peer address
644 * of an association, modify an address's heartbeat interval, force a
645 * heartbeat to be sent immediately, and adjust the address's maximum
646 * number of retransmissions sent before an address is considered
647 * unreachable. The following structure is used to access and modify an
648 * address's parameters:
650 enum sctp_spp_flags {
651 SPP_HB_ENABLE = 1<<0, /*Enable heartbeats*/
652 SPP_HB_DISABLE = 1<<1, /*Disable heartbeats*/
653 SPP_HB = SPP_HB_ENABLE | SPP_HB_DISABLE,
654 SPP_HB_DEMAND = 1<<2, /*Send heartbeat immediately*/
655 SPP_PMTUD_ENABLE = 1<<3, /*Enable PMTU discovery*/
656 SPP_PMTUD_DISABLE = 1<<4, /*Disable PMTU discovery*/
657 SPP_PMTUD = SPP_PMTUD_ENABLE | SPP_PMTUD_DISABLE,
658 SPP_SACKDELAY_ENABLE = 1<<5, /*Enable SACK*/
659 SPP_SACKDELAY_DISABLE = 1<<6, /*Disable SACK*/
660 SPP_SACKDELAY = SPP_SACKDELAY_ENABLE | SPP_SACKDELAY_DISABLE,
661 SPP_HB_TIME_IS_ZERO = 1<<7, /* Set HB delay to 0 */
664 struct sctp_paddrparams {
665 sctp_assoc_t spp_assoc_id;
666 struct sockaddr_storage spp_address;
667 __u32 spp_hbinterval;
668 __u16 spp_pathmaxrxt;
672 } __attribute__((packed, aligned(4)));
675 * 7.1.18. Add a chunk that must be authenticated (SCTP_AUTH_CHUNK)
677 * This set option adds a chunk type that the user is requesting to be
678 * received only in an authenticated way. Changes to the list of chunks
679 * will only effect future associations on the socket.
681 struct sctp_authchunk {
686 * 7.1.19. Get or set the list of supported HMAC Identifiers (SCTP_HMAC_IDENT)
688 * This option gets or sets the list of HMAC algorithms that the local
689 * endpoint requires the peer to use.
692 /* This here is only used by user space as is. It might not be a good idea
693 * to export/reveal the whole structure with reserved fields etc.
696 SCTP_AUTH_HMAC_ID_SHA1 = 1,
697 SCTP_AUTH_HMAC_ID_SHA256 = 3,
701 struct sctp_hmacalgo {
702 __u32 shmac_num_idents;
703 __u16 shmac_idents[];
706 /* Sadly, user and kernel space have different names for
707 * this structure member, so this is to not break anything.
709 #define shmac_number_of_idents shmac_num_idents
712 * 7.1.20. Set a shared key (SCTP_AUTH_KEY)
714 * This option will set a shared secret key which is used to build an
715 * association shared key.
717 struct sctp_authkey {
718 sctp_assoc_t sca_assoc_id;
725 * 7.1.21. Get or set the active shared key (SCTP_AUTH_ACTIVE_KEY)
727 * This option will get or set the active shared key to be used to build
728 * the association shared key.
731 struct sctp_authkeyid {
732 sctp_assoc_t scact_assoc_id;
733 __u16 scact_keynumber;
738 * 7.1.23. Get or set delayed ack timer (SCTP_DELAYED_SACK)
740 * This option will effect the way delayed acks are performed. This
741 * option allows you to get or set the delayed ack time, in
742 * milliseconds. It also allows changing the delayed ack frequency.
743 * Changing the frequency to 1 disables the delayed sack algorithm. If
744 * the assoc_id is 0, then this sets or gets the endpoints default
745 * values. If the assoc_id field is non-zero, then the set or get
746 * effects the specified association for the one to many model (the
747 * assoc_id field is ignored by the one to one model). Note that if
748 * sack_delay or sack_freq are 0 when setting this option, then the
749 * current values will remain unchanged.
751 struct sctp_sack_info {
752 sctp_assoc_t sack_assoc_id;
757 struct sctp_assoc_value {
758 sctp_assoc_t assoc_id;
759 uint32_t assoc_value;
763 * 7.2.2 Peer Address Information
765 * Applications can retrieve information about a specific peer address
766 * of an association, including its reachability state, congestion
767 * window, and retransmission timer values. This information is
768 * read-only. The following structure is used to access this
771 struct sctp_paddrinfo {
772 sctp_assoc_t spinfo_assoc_id;
773 struct sockaddr_storage spinfo_address;
779 } __attribute__((packed, aligned(4)));
781 /* Peer addresses's state. */
782 /* UNKNOWN: Peer address passed by the upper layer in sendmsg or connect[x]
784 * UNCONFIRMED: Peer address received in INIT/INIT-ACK address parameters.
785 * Not yet confirmed by a heartbeat and not available for data
787 * ACTIVE : Peer address confirmed, active and available for data transfers.
788 * INACTIVE: Peer address inactive and not available for data transfers.
790 enum sctp_spinfo_state {
795 SCTP_UNKNOWN = 0xffff /* Value used for transport state unknown */
799 * 7.2.1 Association Status (SCTP_STATUS)
801 * Applications can retrieve current status information about an
802 * association, including association state, peer receiver window size,
803 * number of unacked data chunks, and number of data chunks pending
804 * receipt. This information is read-only. The following structure is
805 * used to access this information:
808 sctp_assoc_t sstat_assoc_id;
811 __u16 sstat_unackdata;
812 __u16 sstat_penddata;
814 __u16 sstat_outstrms;
815 __u32 sstat_fragmentation_point;
816 struct sctp_paddrinfo sstat_primary;
820 * 7.2.3. Get the list of chunks the peer requires to be authenticated
821 * (SCTP_PEER_AUTH_CHUNKS)
823 * This option gets a list of chunks for a specified association that
824 * the peer requires to be received authenticated only.
826 struct sctp_authchunks {
827 sctp_assoc_t gauth_assoc_id;
828 __u32 gauth_number_of_chunks;
829 uint8_t gauth_chunks[];
832 /* The broken spelling has been released already in lksctp-tools header,
833 * so don't break anyone, now that it's fixed.
835 #define guth_number_of_chunks gauth_number_of_chunks
837 /* Association states. */
838 enum sctp_sstat_state {
841 SCTP_COOKIE_WAIT = 2,
842 SCTP_COOKIE_ECHOED = 3,
843 SCTP_ESTABLISHED = 4,
844 SCTP_SHUTDOWN_PENDING = 5,
845 SCTP_SHUTDOWN_SENT = 6,
846 SCTP_SHUTDOWN_RECEIVED = 7,
847 SCTP_SHUTDOWN_ACK_SENT = 8,
851 * 8.2.6. Get the Current Identifiers of Associations
852 * (SCTP_GET_ASSOC_ID_LIST)
854 * This option gets the current list of SCTP association identifiers of
855 * the SCTP associations handled by a one-to-many style socket.
857 struct sctp_assoc_ids {
858 __u32 gaids_number_of_ids;
859 sctp_assoc_t gaids_assoc_id[];
863 * 8.3, 8.5 get all peer/local addresses in an association.
864 * This parameter struct is used by SCTP_GET_PEER_ADDRS and
865 * SCTP_GET_LOCAL_ADDRS socket options used internally to implement
866 * sctp_getpaddrs() and sctp_getladdrs() API.
868 struct sctp_getaddrs_old {
869 sctp_assoc_t assoc_id;
872 struct sockaddr __user *addrs;
874 struct sockaddr *addrs;
878 struct sctp_getaddrs {
879 sctp_assoc_t assoc_id; /*input*/
880 __u32 addr_num; /*output*/
881 __u8 addrs[0]; /*output, variable size*/
884 /* A socket user request obtained via SCTP_GET_ASSOC_STATS that retrieves
885 * association stats. All stats are counts except sas_maxrto and
886 * sas_obs_rto_ipaddr. maxrto is the max observed rto + transport since
887 * the last call. Will return 0 when RTO was not update since last call
889 struct sctp_assoc_stats {
890 sctp_assoc_t sas_assoc_id; /* Input */
891 /* Transport of observed max RTO */
892 struct sockaddr_storage sas_obs_rto_ipaddr;
893 __u64 sas_maxrto; /* Maximum Observed RTO for period */
894 __u64 sas_isacks; /* SACKs received */
895 __u64 sas_osacks; /* SACKs sent */
896 __u64 sas_opackets; /* Packets sent */
897 __u64 sas_ipackets; /* Packets received */
898 __u64 sas_rtxchunks; /* Retransmitted Chunks */
899 __u64 sas_outofseqtsns;/* TSN received > next expected */
900 __u64 sas_idupchunks; /* Dups received (ordered+unordered) */
901 __u64 sas_gapcnt; /* Gap Acknowledgements Received */
902 __u64 sas_ouodchunks; /* Unordered data chunks sent */
903 __u64 sas_iuodchunks; /* Unordered data chunks received */
904 __u64 sas_oodchunks; /* Ordered data chunks sent */
905 __u64 sas_iodchunks; /* Ordered data chunks received */
906 __u64 sas_octrlchunks; /* Control chunks sent */
907 __u64 sas_ictrlchunks; /* Control chunks received */
913 * The flags parameter is formed from the bitwise OR of zero or more of the
914 * following currently defined flags:
916 #define SCTP_BINDX_ADD_ADDR 0x01
917 #define SCTP_BINDX_REM_ADDR 0x02
919 /* This is the structure that is passed as an argument(optval) to
920 * getsockopt(SCTP_SOCKOPT_PEELOFF).
923 sctp_assoc_t associd;
925 } sctp_peeloff_arg_t;
928 * Peer Address Thresholds socket option
930 struct sctp_paddrthlds {
931 sctp_assoc_t spt_assoc_id;
932 struct sockaddr_storage spt_address;
933 __u16 spt_pathmaxrxt;
934 __u16 spt_pathpfthld;
938 * Socket Option for Getting the Association/Stream-Specific PR-SCTP Status
940 struct sctp_prstatus {
941 sctp_assoc_t sprstat_assoc_id;
943 __u16 sprstat_policy;
944 __u64 sprstat_abandoned_unsent;
945 __u64 sprstat_abandoned_sent;
948 struct sctp_default_prinfo {
949 sctp_assoc_t pr_assoc_id;
958 __u16 sctpi_unackdata;
959 __u16 sctpi_penddata;
961 __u16 sctpi_outstrms;
962 __u32 sctpi_fragmentation_point;
964 __u32 sctpi_outqueue;
965 __u32 sctpi_overall_error;
966 __u32 sctpi_max_burst;
968 __u32 sctpi_peer_rwnd;
969 __u32 sctpi_peer_tag;
970 __u8 sctpi_peer_capable;
971 __u8 sctpi_peer_sack;
974 /* assoc status info */
977 __u64 sctpi_opackets;
978 __u64 sctpi_ipackets;
979 __u64 sctpi_rtxchunks;
980 __u64 sctpi_outofseqtsns;
981 __u64 sctpi_idupchunks;
983 __u64 sctpi_ouodchunks;
984 __u64 sctpi_iuodchunks;
985 __u64 sctpi_oodchunks;
986 __u64 sctpi_iodchunks;
987 __u64 sctpi_octrlchunks;
988 __u64 sctpi_ictrlchunks;
990 /* primary transport info */
991 struct sockaddr_storage sctpi_p_address;
996 __u32 sctpi_p_hbinterval;
997 __u32 sctpi_p_pathmaxrxt;
998 __u32 sctpi_p_sackdelay;
999 __u32 sctpi_p_sackfreq;
1000 __u32 sctpi_p_ssthresh;
1001 __u32 sctpi_p_partial_bytes_acked;
1002 __u32 sctpi_p_flight_size;
1003 __u16 sctpi_p_error;
1006 /* sctp sock info */
1007 __u32 sctpi_s_autoclose;
1008 __u32 sctpi_s_adaptation_ind;
1009 __u32 sctpi_s_pd_point;
1010 __u8 sctpi_s_nodelay;
1011 __u8 sctpi_s_disable_fragments;
1012 __u8 sctpi_s_v4mapped;
1013 __u8 sctpi_s_frag_interleave;
1018 #endif /* _UAPI_SCTP_H */