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
119 /* PR-SCTP policies */
120 #define SCTP_PR_SCTP_NONE 0x0000
121 #define SCTP_PR_SCTP_TTL 0x0010
122 #define SCTP_PR_SCTP_RTX 0x0020
123 #define SCTP_PR_SCTP_PRIO 0x0030
124 #define SCTP_PR_SCTP_MAX SCTP_PR_SCTP_PRIO
125 #define SCTP_PR_SCTP_MASK 0x0030
127 #define __SCTP_PR_INDEX(x) ((x >> 4) - 1)
128 #define SCTP_PR_INDEX(x) __SCTP_PR_INDEX(SCTP_PR_SCTP_ ## x)
130 #define SCTP_PR_POLICY(x) ((x) & SCTP_PR_SCTP_MASK)
131 #define SCTP_PR_SET_POLICY(flags, x) \
133 flags &= ~SCTP_PR_SCTP_MASK; \
137 #define SCTP_PR_TTL_ENABLED(x) (SCTP_PR_POLICY(x) == SCTP_PR_SCTP_TTL)
138 #define SCTP_PR_RTX_ENABLED(x) (SCTP_PR_POLICY(x) == SCTP_PR_SCTP_RTX)
139 #define SCTP_PR_PRIO_ENABLED(x) (SCTP_PR_POLICY(x) == SCTP_PR_SCTP_PRIO)
141 /* These are bit fields for msghdr->msg_flags. See section 5.1. */
142 /* On user space Linux, these live in <bits/socket.h> as an enum. */
143 enum sctp_msg_flags {
144 MSG_NOTIFICATION = 0x8000,
145 #define MSG_NOTIFICATION MSG_NOTIFICATION
148 /* 5.3.1 SCTP Initiation Structure (SCTP_INIT)
150 * This cmsghdr structure provides information for initializing new
151 * SCTP associations with sendmsg(). The SCTP_INITMSG socket option
152 * uses this same data structure. This structure is not used for
155 * cmsg_level cmsg_type cmsg_data[]
156 * ------------ ------------ ----------------------
157 * IPPROTO_SCTP SCTP_INIT struct sctp_initmsg
159 struct sctp_initmsg {
160 __u16 sinit_num_ostreams;
161 __u16 sinit_max_instreams;
162 __u16 sinit_max_attempts;
163 __u16 sinit_max_init_timeo;
166 /* 5.3.2 SCTP Header Information Structure (SCTP_SNDRCV)
168 * This cmsghdr structure specifies SCTP options for sendmsg() and
169 * describes SCTP header information about a received message through
172 * cmsg_level cmsg_type cmsg_data[]
173 * ------------ ------------ ----------------------
174 * IPPROTO_SCTP SCTP_SNDRCV struct sctp_sndrcvinfo
176 struct sctp_sndrcvinfo {
182 __u32 sinfo_timetolive;
185 sctp_assoc_t sinfo_assoc_id;
188 /* 5.3.4 SCTP Send Information Structure (SCTP_SNDINFO)
190 * This cmsghdr structure specifies SCTP options for sendmsg().
192 * cmsg_level cmsg_type cmsg_data[]
193 * ------------ ------------ -------------------
194 * IPPROTO_SCTP SCTP_SNDINFO struct sctp_sndinfo
196 struct sctp_sndinfo {
201 sctp_assoc_t snd_assoc_id;
204 /* 5.3.5 SCTP Receive Information Structure (SCTP_RCVINFO)
206 * This cmsghdr structure describes SCTP receive information
207 * about a received message through recvmsg().
209 * cmsg_level cmsg_type cmsg_data[]
210 * ------------ ------------ -------------------
211 * IPPROTO_SCTP SCTP_RCVINFO struct sctp_rcvinfo
213 struct sctp_rcvinfo {
221 sctp_assoc_t rcv_assoc_id;
224 /* 5.3.6 SCTP Next Receive Information Structure (SCTP_NXTINFO)
226 * This cmsghdr structure describes SCTP receive information
227 * of the next message that will be delivered through recvmsg()
228 * if this information is already available when delivering
229 * the current message.
231 * cmsg_level cmsg_type cmsg_data[]
232 * ------------ ------------ -------------------
233 * IPPROTO_SCTP SCTP_NXTINFO struct sctp_nxtinfo
235 struct sctp_nxtinfo {
240 sctp_assoc_t nxt_assoc_id;
244 * sinfo_flags: 16 bits (unsigned integer)
246 * This field may contain any of the following flags and is composed of
247 * a bitwise OR of these values.
249 enum sctp_sinfo_flags {
250 SCTP_UNORDERED = (1 << 0), /* Send/receive message unordered. */
251 SCTP_ADDR_OVER = (1 << 1), /* Override the primary destination. */
252 SCTP_ABORT = (1 << 2), /* Send an ABORT message to the peer. */
253 SCTP_SACK_IMMEDIATELY = (1 << 3), /* SACK should be sent without delay. */
254 SCTP_NOTIFICATION = MSG_NOTIFICATION, /* Next message is not user msg but notification. */
255 SCTP_EOF = MSG_FIN, /* Initiate graceful shutdown process. */
260 struct sctp_initmsg init;
261 struct sctp_sndrcvinfo sndrcv;
264 /* These are cmsg_types. */
265 typedef enum sctp_cmsg_type {
266 SCTP_INIT, /* 5.2.1 SCTP Initiation Structure */
267 #define SCTP_INIT SCTP_INIT
268 SCTP_SNDRCV, /* 5.2.2 SCTP Header Information Structure */
269 #define SCTP_SNDRCV SCTP_SNDRCV
270 SCTP_SNDINFO, /* 5.3.4 SCTP Send Information Structure */
271 #define SCTP_SNDINFO SCTP_SNDINFO
272 SCTP_RCVINFO, /* 5.3.5 SCTP Receive Information Structure */
273 #define SCTP_RCVINFO SCTP_RCVINFO
274 SCTP_NXTINFO, /* 5.3.6 SCTP Next Receive Information Structure */
275 #define SCTP_NXTINFO SCTP_NXTINFO
279 * 5.3.1.1 SCTP_ASSOC_CHANGE
281 * Communication notifications inform the ULP that an SCTP association
282 * has either begun or ended. The identifier for a new association is
283 * provided by this notificaion. The notification information has the
287 struct sctp_assoc_change {
293 __u16 sac_outbound_streams;
294 __u16 sac_inbound_streams;
295 sctp_assoc_t sac_assoc_id;
300 * sac_state: 32 bits (signed integer)
302 * This field holds one of a number of values that communicate the
303 * event that happened to the association. They include:
305 * Note: The following state names deviate from the API draft as
306 * the names clash too easily with other kernel symbols.
308 enum sctp_sac_state {
317 * 5.3.1.2 SCTP_PEER_ADDR_CHANGE
319 * When a destination address on a multi-homed peer encounters a change
320 * an interface details event is sent. The information has the
321 * following structure:
323 struct sctp_paddr_change {
327 struct sockaddr_storage spc_aaddr;
330 sctp_assoc_t spc_assoc_id;
331 } __attribute__((packed, aligned(4)));
334 * spc_state: 32 bits (signed integer)
336 * This field holds one of a number of values that communicate the
337 * event that happened to the address. They include:
339 enum sctp_spc_state {
341 SCTP_ADDR_UNREACHABLE,
350 * 5.3.1.3 SCTP_REMOTE_ERROR
352 * A remote peer may send an Operational Error message to its peer.
353 * This message indicates a variety of error conditions on an
354 * association. The entire error TLV as it appears on the wire is
355 * included in a SCTP_REMOTE_ERROR event. Please refer to the SCTP
356 * specification [SCTP] and any extensions for a list of possible
357 * error formats. SCTP error TLVs have the format:
359 struct sctp_remote_error {
364 sctp_assoc_t sre_assoc_id;
370 * 5.3.1.4 SCTP_SEND_FAILED
372 * If SCTP cannot deliver a message it may return the message as a
375 struct sctp_send_failed {
380 struct sctp_sndrcvinfo ssf_info;
381 sctp_assoc_t ssf_assoc_id;
386 * ssf_flags: 16 bits (unsigned integer)
388 * The flag value will take one of the following values
390 * SCTP_DATA_UNSENT - Indicates that the data was never put on
393 * SCTP_DATA_SENT - Indicates that the data was put on the wire.
394 * Note that this does not necessarily mean that the
395 * data was (or was not) successfully delivered.
397 enum sctp_ssf_flags {
403 * 5.3.1.5 SCTP_SHUTDOWN_EVENT
405 * When a peer sends a SHUTDOWN, SCTP delivers this notification to
406 * inform the application that it should cease sending data.
408 struct sctp_shutdown_event {
412 sctp_assoc_t sse_assoc_id;
416 * 5.3.1.6 SCTP_ADAPTATION_INDICATION
418 * When a peer sends a Adaptation Layer Indication parameter , SCTP
419 * delivers this notification to inform the application
420 * that of the peers requested adaptation layer.
422 struct sctp_adaptation_event {
426 __u32 sai_adaptation_ind;
427 sctp_assoc_t sai_assoc_id;
431 * 5.3.1.7 SCTP_PARTIAL_DELIVERY_EVENT
433 * When a receiver is engaged in a partial delivery of a
434 * message this notification will be used to indicate
437 struct sctp_pdapi_event {
441 __u32 pdapi_indication;
442 sctp_assoc_t pdapi_assoc_id;
445 enum { SCTP_PARTIAL_DELIVERY_ABORTED=0, };
448 * 5.3.1.8. SCTP_AUTHENTICATION_EVENT
450 * When a receiver is using authentication this message will provide
451 * notifications regarding new keys being made active as well as errors.
453 struct sctp_authkey_event {
457 __u16 auth_keynumber;
458 __u16 auth_altkeynumber;
459 __u32 auth_indication;
460 sctp_assoc_t auth_assoc_id;
463 enum { SCTP_AUTH_NEWKEY = 0, };
466 * 6.1.9. SCTP_SENDER_DRY_EVENT
468 * When the SCTP stack has no more user data to send or retransmit, this
469 * notification is given to the user. Also, at the time when a user app
470 * subscribes to this event, if there is no data to be sent or
471 * retransmit, the stack will immediately send up this notification.
473 struct sctp_sender_dry_event {
474 __u16 sender_dry_type;
475 __u16 sender_dry_flags;
476 __u32 sender_dry_length;
477 sctp_assoc_t sender_dry_assoc_id;
481 * Described in Section 7.3
482 * Ancillary Data and Notification Interest Options
484 struct sctp_event_subscribe {
485 __u8 sctp_data_io_event;
486 __u8 sctp_association_event;
487 __u8 sctp_address_event;
488 __u8 sctp_send_failure_event;
489 __u8 sctp_peer_error_event;
490 __u8 sctp_shutdown_event;
491 __u8 sctp_partial_delivery_event;
492 __u8 sctp_adaptation_layer_event;
493 __u8 sctp_authentication_event;
494 __u8 sctp_sender_dry_event;
498 * 5.3.1 SCTP Notification Structure
500 * The notification structure is defined as the union of all
501 * notification types.
504 union sctp_notification {
506 __u16 sn_type; /* Notification type. */
510 struct sctp_assoc_change sn_assoc_change;
511 struct sctp_paddr_change sn_paddr_change;
512 struct sctp_remote_error sn_remote_error;
513 struct sctp_send_failed sn_send_failed;
514 struct sctp_shutdown_event sn_shutdown_event;
515 struct sctp_adaptation_event sn_adaptation_event;
516 struct sctp_pdapi_event sn_pdapi_event;
517 struct sctp_authkey_event sn_authkey_event;
518 struct sctp_sender_dry_event sn_sender_dry_event;
522 * All standard values for sn_type flags are greater than 2^15.
523 * Values from 2^15 and down are reserved.
527 SCTP_SN_TYPE_BASE = (1<<15),
529 #define SCTP_ASSOC_CHANGE SCTP_ASSOC_CHANGE
530 SCTP_PEER_ADDR_CHANGE,
531 #define SCTP_PEER_ADDR_CHANGE SCTP_PEER_ADDR_CHANGE
533 #define SCTP_SEND_FAILED SCTP_SEND_FAILED
535 #define SCTP_REMOTE_ERROR SCTP_REMOTE_ERROR
537 #define SCTP_SHUTDOWN_EVENT SCTP_SHUTDOWN_EVENT
538 SCTP_PARTIAL_DELIVERY_EVENT,
539 #define SCTP_PARTIAL_DELIVERY_EVENT SCTP_PARTIAL_DELIVERY_EVENT
540 SCTP_ADAPTATION_INDICATION,
541 #define SCTP_ADAPTATION_INDICATION SCTP_ADAPTATION_INDICATION
542 SCTP_AUTHENTICATION_EVENT,
543 #define SCTP_AUTHENTICATION_INDICATION SCTP_AUTHENTICATION_EVENT
544 SCTP_SENDER_DRY_EVENT,
545 #define SCTP_SENDER_DRY_EVENT SCTP_SENDER_DRY_EVENT
548 /* Notification error codes used to fill up the error fields in some
550 * SCTP_PEER_ADDRESS_CHAGE : spc_error
551 * SCTP_ASSOC_CHANGE : sac_error
552 * These names should be potentially included in the draft 04 of the SCTP
553 * sockets API specification.
555 typedef enum sctp_sn_error {
556 SCTP_FAILED_THRESHOLD,
558 SCTP_HEARTBEAT_SUCCESS,
559 SCTP_RESPONSE_TO_USER_REQ,
561 SCTP_SHUTDOWN_GUARD_EXPIRES,
566 * 7.1.1 Retransmission Timeout Parameters (SCTP_RTOINFO)
568 * The protocol parameters used to initialize and bound retransmission
569 * timeout (RTO) are tunable. See [SCTP] for more information on how
570 * these parameters are used in RTO calculation.
572 struct sctp_rtoinfo {
573 sctp_assoc_t srto_assoc_id;
580 * 7.1.2 Association Parameters (SCTP_ASSOCINFO)
582 * This option is used to both examine and set various association and
583 * endpoint parameters.
585 struct sctp_assocparams {
586 sctp_assoc_t sasoc_assoc_id;
587 __u16 sasoc_asocmaxrxt;
588 __u16 sasoc_number_peer_destinations;
589 __u32 sasoc_peer_rwnd;
590 __u32 sasoc_local_rwnd;
591 __u32 sasoc_cookie_life;
595 * 7.1.9 Set Peer Primary Address (SCTP_SET_PEER_PRIMARY_ADDR)
597 * Requests that the peer mark the enclosed address as the association
598 * primary. The enclosed address must be one of the association's
599 * locally bound addresses. The following structure is used to make a
600 * set primary request:
602 struct sctp_setpeerprim {
603 sctp_assoc_t sspp_assoc_id;
604 struct sockaddr_storage sspp_addr;
605 } __attribute__((packed, aligned(4)));
608 * 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR)
610 * Requests that the local SCTP stack use the enclosed peer address as
611 * the association primary. The enclosed address must be one of the
612 * association peer's addresses. The following structure is used to
613 * make a set peer primary request:
616 sctp_assoc_t ssp_assoc_id;
617 struct sockaddr_storage ssp_addr;
618 } __attribute__((packed, aligned(4)));
620 /* For backward compatibility use, define the old name too */
621 #define sctp_setprim sctp_prim
624 * 7.1.11 Set Adaptation Layer Indicator (SCTP_ADAPTATION_LAYER)
626 * Requests that the local endpoint set the specified Adaptation Layer
627 * Indication parameter for all future INIT and INIT-ACK exchanges.
629 struct sctp_setadaptation {
630 __u32 ssb_adaptation_ind;
634 * 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS)
636 * Applications can enable or disable heartbeats for any peer address
637 * of an association, modify an address's heartbeat interval, force a
638 * heartbeat to be sent immediately, and adjust the address's maximum
639 * number of retransmissions sent before an address is considered
640 * unreachable. The following structure is used to access and modify an
641 * address's parameters:
643 enum sctp_spp_flags {
644 SPP_HB_ENABLE = 1<<0, /*Enable heartbeats*/
645 SPP_HB_DISABLE = 1<<1, /*Disable heartbeats*/
646 SPP_HB = SPP_HB_ENABLE | SPP_HB_DISABLE,
647 SPP_HB_DEMAND = 1<<2, /*Send heartbeat immediately*/
648 SPP_PMTUD_ENABLE = 1<<3, /*Enable PMTU discovery*/
649 SPP_PMTUD_DISABLE = 1<<4, /*Disable PMTU discovery*/
650 SPP_PMTUD = SPP_PMTUD_ENABLE | SPP_PMTUD_DISABLE,
651 SPP_SACKDELAY_ENABLE = 1<<5, /*Enable SACK*/
652 SPP_SACKDELAY_DISABLE = 1<<6, /*Disable SACK*/
653 SPP_SACKDELAY = SPP_SACKDELAY_ENABLE | SPP_SACKDELAY_DISABLE,
654 SPP_HB_TIME_IS_ZERO = 1<<7, /* Set HB delay to 0 */
657 struct sctp_paddrparams {
658 sctp_assoc_t spp_assoc_id;
659 struct sockaddr_storage spp_address;
660 __u32 spp_hbinterval;
661 __u16 spp_pathmaxrxt;
665 } __attribute__((packed, aligned(4)));
668 * 7.1.18. Add a chunk that must be authenticated (SCTP_AUTH_CHUNK)
670 * This set option adds a chunk type that the user is requesting to be
671 * received only in an authenticated way. Changes to the list of chunks
672 * will only effect future associations on the socket.
674 struct sctp_authchunk {
679 * 7.1.19. Get or set the list of supported HMAC Identifiers (SCTP_HMAC_IDENT)
681 * This option gets or sets the list of HMAC algorithms that the local
682 * endpoint requires the peer to use.
685 /* This here is only used by user space as is. It might not be a good idea
686 * to export/reveal the whole structure with reserved fields etc.
689 SCTP_AUTH_HMAC_ID_SHA1 = 1,
690 SCTP_AUTH_HMAC_ID_SHA256 = 3,
694 struct sctp_hmacalgo {
695 __u32 shmac_num_idents;
696 __u16 shmac_idents[];
699 /* Sadly, user and kernel space have different names for
700 * this structure member, so this is to not break anything.
702 #define shmac_number_of_idents shmac_num_idents
705 * 7.1.20. Set a shared key (SCTP_AUTH_KEY)
707 * This option will set a shared secret key which is used to build an
708 * association shared key.
710 struct sctp_authkey {
711 sctp_assoc_t sca_assoc_id;
718 * 7.1.21. Get or set the active shared key (SCTP_AUTH_ACTIVE_KEY)
720 * This option will get or set the active shared key to be used to build
721 * the association shared key.
724 struct sctp_authkeyid {
725 sctp_assoc_t scact_assoc_id;
726 __u16 scact_keynumber;
731 * 7.1.23. Get or set delayed ack timer (SCTP_DELAYED_SACK)
733 * This option will effect the way delayed acks are performed. This
734 * option allows you to get or set the delayed ack time, in
735 * milliseconds. It also allows changing the delayed ack frequency.
736 * Changing the frequency to 1 disables the delayed sack algorithm. If
737 * the assoc_id is 0, then this sets or gets the endpoints default
738 * values. If the assoc_id field is non-zero, then the set or get
739 * effects the specified association for the one to many model (the
740 * assoc_id field is ignored by the one to one model). Note that if
741 * sack_delay or sack_freq are 0 when setting this option, then the
742 * current values will remain unchanged.
744 struct sctp_sack_info {
745 sctp_assoc_t sack_assoc_id;
750 struct sctp_assoc_value {
751 sctp_assoc_t assoc_id;
752 uint32_t assoc_value;
756 * 7.2.2 Peer Address Information
758 * Applications can retrieve information about a specific peer address
759 * of an association, including its reachability state, congestion
760 * window, and retransmission timer values. This information is
761 * read-only. The following structure is used to access this
764 struct sctp_paddrinfo {
765 sctp_assoc_t spinfo_assoc_id;
766 struct sockaddr_storage spinfo_address;
772 } __attribute__((packed, aligned(4)));
774 /* Peer addresses's state. */
775 /* UNKNOWN: Peer address passed by the upper layer in sendmsg or connect[x]
777 * UNCONFIRMED: Peer address received in INIT/INIT-ACK address parameters.
778 * Not yet confirmed by a heartbeat and not available for data
780 * ACTIVE : Peer address confirmed, active and available for data transfers.
781 * INACTIVE: Peer address inactive and not available for data transfers.
783 enum sctp_spinfo_state {
788 SCTP_UNKNOWN = 0xffff /* Value used for transport state unknown */
792 * 7.2.1 Association Status (SCTP_STATUS)
794 * Applications can retrieve current status information about an
795 * association, including association state, peer receiver window size,
796 * number of unacked data chunks, and number of data chunks pending
797 * receipt. This information is read-only. The following structure is
798 * used to access this information:
801 sctp_assoc_t sstat_assoc_id;
804 __u16 sstat_unackdata;
805 __u16 sstat_penddata;
807 __u16 sstat_outstrms;
808 __u32 sstat_fragmentation_point;
809 struct sctp_paddrinfo sstat_primary;
813 * 7.2.3. Get the list of chunks the peer requires to be authenticated
814 * (SCTP_PEER_AUTH_CHUNKS)
816 * This option gets a list of chunks for a specified association that
817 * the peer requires to be received authenticated only.
819 struct sctp_authchunks {
820 sctp_assoc_t gauth_assoc_id;
821 __u32 gauth_number_of_chunks;
822 uint8_t gauth_chunks[];
825 /* The broken spelling has been released already in lksctp-tools header,
826 * so don't break anyone, now that it's fixed.
828 #define guth_number_of_chunks gauth_number_of_chunks
830 /* Association states. */
831 enum sctp_sstat_state {
834 SCTP_COOKIE_WAIT = 2,
835 SCTP_COOKIE_ECHOED = 3,
836 SCTP_ESTABLISHED = 4,
837 SCTP_SHUTDOWN_PENDING = 5,
838 SCTP_SHUTDOWN_SENT = 6,
839 SCTP_SHUTDOWN_RECEIVED = 7,
840 SCTP_SHUTDOWN_ACK_SENT = 8,
844 * 8.2.6. Get the Current Identifiers of Associations
845 * (SCTP_GET_ASSOC_ID_LIST)
847 * This option gets the current list of SCTP association identifiers of
848 * the SCTP associations handled by a one-to-many style socket.
850 struct sctp_assoc_ids {
851 __u32 gaids_number_of_ids;
852 sctp_assoc_t gaids_assoc_id[];
856 * 8.3, 8.5 get all peer/local addresses in an association.
857 * This parameter struct is used by SCTP_GET_PEER_ADDRS and
858 * SCTP_GET_LOCAL_ADDRS socket options used internally to implement
859 * sctp_getpaddrs() and sctp_getladdrs() API.
861 struct sctp_getaddrs_old {
862 sctp_assoc_t assoc_id;
865 struct sockaddr __user *addrs;
867 struct sockaddr *addrs;
871 struct sctp_getaddrs {
872 sctp_assoc_t assoc_id; /*input*/
873 __u32 addr_num; /*output*/
874 __u8 addrs[0]; /*output, variable size*/
877 /* A socket user request obtained via SCTP_GET_ASSOC_STATS that retrieves
878 * association stats. All stats are counts except sas_maxrto and
879 * sas_obs_rto_ipaddr. maxrto is the max observed rto + transport since
880 * the last call. Will return 0 when RTO was not update since last call
882 struct sctp_assoc_stats {
883 sctp_assoc_t sas_assoc_id; /* Input */
884 /* Transport of observed max RTO */
885 struct sockaddr_storage sas_obs_rto_ipaddr;
886 __u64 sas_maxrto; /* Maximum Observed RTO for period */
887 __u64 sas_isacks; /* SACKs received */
888 __u64 sas_osacks; /* SACKs sent */
889 __u64 sas_opackets; /* Packets sent */
890 __u64 sas_ipackets; /* Packets received */
891 __u64 sas_rtxchunks; /* Retransmitted Chunks */
892 __u64 sas_outofseqtsns;/* TSN received > next expected */
893 __u64 sas_idupchunks; /* Dups received (ordered+unordered) */
894 __u64 sas_gapcnt; /* Gap Acknowledgements Received */
895 __u64 sas_ouodchunks; /* Unordered data chunks sent */
896 __u64 sas_iuodchunks; /* Unordered data chunks received */
897 __u64 sas_oodchunks; /* Ordered data chunks sent */
898 __u64 sas_iodchunks; /* Ordered data chunks received */
899 __u64 sas_octrlchunks; /* Control chunks sent */
900 __u64 sas_ictrlchunks; /* Control chunks received */
906 * The flags parameter is formed from the bitwise OR of zero or more of the
907 * following currently defined flags:
909 #define SCTP_BINDX_ADD_ADDR 0x01
910 #define SCTP_BINDX_REM_ADDR 0x02
912 /* This is the structure that is passed as an argument(optval) to
913 * getsockopt(SCTP_SOCKOPT_PEELOFF).
916 sctp_assoc_t associd;
918 } sctp_peeloff_arg_t;
921 * Peer Address Thresholds socket option
923 struct sctp_paddrthlds {
924 sctp_assoc_t spt_assoc_id;
925 struct sockaddr_storage spt_address;
926 __u16 spt_pathmaxrxt;
927 __u16 spt_pathpfthld;
931 * Socket Option for Getting the Association/Stream-Specific PR-SCTP Status
933 struct sctp_prstatus {
934 sctp_assoc_t sprstat_assoc_id;
936 __u16 sprstat_policy;
937 __u64 sprstat_abandoned_unsent;
938 __u64 sprstat_abandoned_sent;
941 struct sctp_default_prinfo {
942 sctp_assoc_t pr_assoc_id;
951 __u16 sctpi_unackdata;
952 __u16 sctpi_penddata;
954 __u16 sctpi_outstrms;
955 __u32 sctpi_fragmentation_point;
957 __u32 sctpi_outqueue;
958 __u32 sctpi_overall_error;
959 __u32 sctpi_max_burst;
961 __u32 sctpi_peer_rwnd;
962 __u32 sctpi_peer_tag;
963 __u8 sctpi_peer_capable;
964 __u8 sctpi_peer_sack;
967 /* assoc status info */
970 __u64 sctpi_opackets;
971 __u64 sctpi_ipackets;
972 __u64 sctpi_rtxchunks;
973 __u64 sctpi_outofseqtsns;
974 __u64 sctpi_idupchunks;
976 __u64 sctpi_ouodchunks;
977 __u64 sctpi_iuodchunks;
978 __u64 sctpi_oodchunks;
979 __u64 sctpi_iodchunks;
980 __u64 sctpi_octrlchunks;
981 __u64 sctpi_ictrlchunks;
983 /* primary transport info */
984 struct sockaddr_storage sctpi_p_address;
989 __u32 sctpi_p_hbinterval;
990 __u32 sctpi_p_pathmaxrxt;
991 __u32 sctpi_p_sackdelay;
992 __u32 sctpi_p_sackfreq;
993 __u32 sctpi_p_ssthresh;
994 __u32 sctpi_p_partial_bytes_acked;
995 __u32 sctpi_p_flight_size;
1000 __u32 sctpi_s_autoclose;
1001 __u32 sctpi_s_adaptation_ind;
1002 __u32 sctpi_s_pd_point;
1003 __u8 sctpi_s_nodelay;
1004 __u8 sctpi_s_disable_fragments;
1005 __u8 sctpi_s_v4mapped;
1006 __u8 sctpi_s_frag_interleave;
1011 #endif /* _UAPI_SCTP_H */