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, write to
26 * the Free Software Foundation, 59 Temple Place - Suite 330,
27 * Boston, MA 02111-1307, USA.
29 * Please send any bug reports or fixes you make to the
31 * lksctp developers <lksctp-developers@lists.sourceforge.net>
33 * Or submit a bug report through the following website:
34 * http://www.sf.net/projects/lksctp
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>
48 * Any bugs reported given to us we will try to fix... any fixes shared will
49 * be incorporated into the next SCTP release.
52 #ifndef __net_sctp_user_h__
53 #define __net_sctp_user_h__
55 #include <linux/types.h>
56 #include <linux/socket.h>
58 typedef __s32 sctp_assoc_t;
60 /* The following symbols come from the Sockets API Extensions for
61 * SCTP <draft-ietf-tsvwg-sctpsocket-07.txt>.
65 #define SCTP_RTOINFO SCTP_RTOINFO
67 #define SCTP_ASSOCINFO SCTP_ASSOCINFO
69 #define SCTP_INITMSG SCTP_INITMSG
70 SCTP_NODELAY, /* Get/set nodelay option. */
71 #define SCTP_NODELAY SCTP_NODELAY
73 #define SCTP_AUTOCLOSE SCTP_AUTOCLOSE
74 SCTP_SET_PEER_PRIMARY_ADDR,
75 #define SCTP_SET_PEER_PRIMARY_ADDR SCTP_SET_PEER_PRIMARY_ADDR
77 #define SCTP_PRIMARY_ADDR SCTP_PRIMARY_ADDR
78 SCTP_ADAPTATION_LAYER,
79 #define SCTP_ADAPTATION_LAYER SCTP_ADAPTATION_LAYER
80 SCTP_DISABLE_FRAGMENTS,
81 #define SCTP_DISABLE_FRAGMENTS SCTP_DISABLE_FRAGMENTS
82 SCTP_PEER_ADDR_PARAMS,
83 #define SCTP_PEER_ADDR_PARAMS SCTP_PEER_ADDR_PARAMS
84 SCTP_DEFAULT_SEND_PARAM,
85 #define SCTP_DEFAULT_SEND_PARAM SCTP_DEFAULT_SEND_PARAM
87 #define SCTP_EVENTS SCTP_EVENTS
88 SCTP_I_WANT_MAPPED_V4_ADDR, /* Turn on/off mapped v4 addresses */
89 #define SCTP_I_WANT_MAPPED_V4_ADDR SCTP_I_WANT_MAPPED_V4_ADDR
90 SCTP_MAXSEG, /* Get/set maximum fragment. */
91 #define SCTP_MAXSEG SCTP_MAXSEG
93 #define SCTP_STATUS SCTP_STATUS
94 SCTP_GET_PEER_ADDR_INFO,
95 #define SCTP_GET_PEER_ADDR_INFO SCTP_GET_PEER_ADDR_INFO
97 #define SCTP_DELAYED_ACK_TIME SCTP_DELAYED_ACK
98 #define SCTP_DELAYED_ACK SCTP_DELAYED_ACK
99 SCTP_CONTEXT, /* Receive Context */
100 #define SCTP_CONTEXT SCTP_CONTEXT
101 SCTP_FRAGMENT_INTERLEAVE,
102 #define SCTP_FRAGMENT_INTERLEAVE SCTP_FRAGMENT_INTERLEAVE
103 SCTP_PARTIAL_DELIVERY_POINT, /* Set/Get partial delivery point */
104 #define SCTP_PARTIAL_DELIVERY_POINT SCTP_PARTIAL_DELIVERY_POINT
105 SCTP_MAX_BURST, /* Set/Get max burst */
106 #define SCTP_MAX_BURST SCTP_MAX_BURST
107 SCTP_AUTH_CHUNK, /* Set only: add a chunk type to authenticat */
108 #define SCTP_AUTH_CHUNK SCTP_AUTH_CHUNK
110 #define SCTP_HMAC_IDENT SCTP_HMAC_IDENT
112 #define SCTP_AUTH_KEY SCTP_AUTH_KEY
113 SCTP_AUTH_ACTIVE_KEY,
114 #define SCTP_AUTH_ACTIVE_KEY SCTP_AUTH_ACTIVE_KEY
115 SCTP_AUTH_DELETE_KEY,
116 #define SCTP_AUTH_DELETE_KEY SCTP_AUTH_DELETE_KEY
117 SCTP_PEER_AUTH_CHUNKS, /* Read only */
118 #define SCTP_PEER_AUTH_CHUNKS SCTP_PEER_AUTH_CHUNKS
119 SCTP_LOCAL_AUTH_CHUNKS, /* Read only */
120 #define SCTP_LOCAL_AUTH_CHUNKS SCTP_LOCAL_AUTH_CHUNKS
121 SCTP_GET_ASSOC_NUMBER, /* Read only */
122 #define SCTP_GET_ASSOC_NUMBER SCTP_GET_ASSOC_NUMBER
125 /* Internal Socket Options. Some of the sctp library functions are
126 * implemented using these socket options.
128 SCTP_SOCKOPT_BINDX_ADD = 100,/* BINDX requests for adding addresses. */
129 #define SCTP_SOCKOPT_BINDX_ADD SCTP_SOCKOPT_BINDX_ADD
130 SCTP_SOCKOPT_BINDX_REM, /* BINDX requests for removing addresses. */
131 #define SCTP_SOCKOPT_BINDX_REM SCTP_SOCKOPT_BINDX_REM
132 SCTP_SOCKOPT_PEELOFF, /* peel off association. */
133 #define SCTP_SOCKOPT_PEELOFF SCTP_SOCKOPT_PEELOFF
134 SCTP_GET_PEER_ADDRS_NUM_OLD, /* Get number of peer addresss. */
135 #define SCTP_GET_PEER_ADDRS_NUM_OLD SCTP_GET_PEER_ADDRS_NUM_OLD
136 SCTP_GET_PEER_ADDRS_OLD, /* Get all peer addresss. */
137 #define SCTP_GET_PEER_ADDRS_OLD SCTP_GET_PEER_ADDRS_OLD
138 SCTP_GET_LOCAL_ADDRS_NUM_OLD, /* Get number of local addresss. */
139 #define SCTP_GET_LOCAL_ADDRS_NUM_OLD SCTP_GET_LOCAL_ADDRS_NUM_OLD
140 SCTP_GET_LOCAL_ADDRS_OLD, /* Get all local addresss. */
141 #define SCTP_GET_LOCAL_ADDRS_OLD SCTP_GET_LOCAL_ADDRS_OLD
142 SCTP_SOCKOPT_CONNECTX_OLD, /* CONNECTX old requests. */
143 #define SCTP_SOCKOPT_CONNECTX_OLD SCTP_SOCKOPT_CONNECTX_OLD
144 SCTP_GET_PEER_ADDRS, /* Get all peer addresss. */
145 #define SCTP_GET_PEER_ADDRS SCTP_GET_PEER_ADDRS
146 SCTP_GET_LOCAL_ADDRS, /* Get all local addresss. */
147 #define SCTP_GET_LOCAL_ADDRS SCTP_GET_LOCAL_ADDRS
148 SCTP_SOCKOPT_CONNECTX, /* CONNECTX requests. */
149 #define SCTP_SOCKOPT_CONNECTX SCTP_SOCKOPT_CONNECTX
153 * 5.2.1 SCTP Initiation Structure (SCTP_INIT)
155 * This cmsghdr structure provides information for initializing new
156 * SCTP associations with sendmsg(). The SCTP_INITMSG socket option
157 * uses this same data structure. This structure is not used for
160 * cmsg_level cmsg_type cmsg_data[]
161 * ------------ ------------ ----------------------
162 * IPPROTO_SCTP SCTP_INIT struct sctp_initmsg
165 struct sctp_initmsg {
166 __u16 sinit_num_ostreams;
167 __u16 sinit_max_instreams;
168 __u16 sinit_max_attempts;
169 __u16 sinit_max_init_timeo;
173 * 5.2.2 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
184 struct sctp_sndrcvinfo {
190 __u32 sinfo_timetolive;
193 sctp_assoc_t sinfo_assoc_id;
197 * sinfo_flags: 16 bits (unsigned integer)
199 * This field may contain any of the following flags and is composed of
200 * a bitwise OR of these values.
203 enum sctp_sinfo_flags {
204 SCTP_UNORDERED = 1, /* Send/receive message unordered. */
205 SCTP_ADDR_OVER = 2, /* Override the primary destination. */
206 SCTP_ABORT=4, /* Send an ABORT message to the peer. */
207 SCTP_EOF=MSG_FIN, /* Initiate graceful shutdown process. */
213 struct sctp_initmsg init;
214 struct sctp_sndrcvinfo sndrcv;
217 /* These are cmsg_types. */
218 typedef enum sctp_cmsg_type {
219 SCTP_INIT, /* 5.2.1 SCTP Initiation Structure */
220 SCTP_SNDRCV, /* 5.2.2 SCTP Header Information Structure */
225 * 5.3.1.1 SCTP_ASSOC_CHANGE
227 * Communication notifications inform the ULP that an SCTP association
228 * has either begun or ended. The identifier for a new association is
229 * provided by this notificaion. The notification information has the
233 struct sctp_assoc_change {
239 __u16 sac_outbound_streams;
240 __u16 sac_inbound_streams;
241 sctp_assoc_t sac_assoc_id;
246 * sac_state: 32 bits (signed integer)
248 * This field holds one of a number of values that communicate the
249 * event that happened to the association. They include:
251 * Note: The following state names deviate from the API draft as
252 * the names clash too easily with other kernel symbols.
254 enum sctp_sac_state {
263 * 5.3.1.2 SCTP_PEER_ADDR_CHANGE
265 * When a destination address on a multi-homed peer encounters a change
266 * an interface details event is sent. The information has the
267 * following structure:
269 struct sctp_paddr_change {
273 struct sockaddr_storage spc_aaddr;
276 sctp_assoc_t spc_assoc_id;
277 } __attribute__((packed, aligned(4)));
280 * spc_state: 32 bits (signed integer)
282 * This field holds one of a number of values that communicate the
283 * event that happened to the address. They include:
285 enum sctp_spc_state {
287 SCTP_ADDR_UNREACHABLE,
296 * 5.3.1.3 SCTP_REMOTE_ERROR
298 * A remote peer may send an Operational Error message to its peer.
299 * This message indicates a variety of error conditions on an
300 * association. The entire error TLV as it appears on the wire is
301 * included in a SCTP_REMOTE_ERROR event. Please refer to the SCTP
302 * specification [SCTP] and any extensions for a list of possible
303 * error formats. SCTP error TLVs have the format:
305 struct sctp_remote_error {
310 sctp_assoc_t sre_assoc_id;
316 * 5.3.1.4 SCTP_SEND_FAILED
318 * If SCTP cannot deliver a message it may return the message as a
321 struct sctp_send_failed {
326 struct sctp_sndrcvinfo ssf_info;
327 sctp_assoc_t ssf_assoc_id;
332 * ssf_flags: 16 bits (unsigned integer)
334 * The flag value will take one of the following values
336 * SCTP_DATA_UNSENT - Indicates that the data was never put on
339 * SCTP_DATA_SENT - Indicates that the data was put on the wire.
340 * Note that this does not necessarily mean that the
341 * data was (or was not) successfully delivered.
343 enum sctp_ssf_flags {
349 * 5.3.1.5 SCTP_SHUTDOWN_EVENT
351 * When a peer sends a SHUTDOWN, SCTP delivers this notification to
352 * inform the application that it should cease sending data.
354 struct sctp_shutdown_event {
358 sctp_assoc_t sse_assoc_id;
362 * 5.3.1.6 SCTP_ADAPTATION_INDICATION
364 * When a peer sends a Adaptation Layer Indication parameter , SCTP
365 * delivers this notification to inform the application
366 * that of the peers requested adaptation layer.
368 struct sctp_adaptation_event {
372 __u32 sai_adaptation_ind;
373 sctp_assoc_t sai_assoc_id;
377 * 5.3.1.7 SCTP_PARTIAL_DELIVERY_EVENT
379 * When a receiver is engaged in a partial delivery of a
380 * message this notification will be used to indicate
383 struct sctp_pdapi_event {
387 __u32 pdapi_indication;
388 sctp_assoc_t pdapi_assoc_id;
391 enum { SCTP_PARTIAL_DELIVERY_ABORTED=0, };
393 struct sctp_authkey_event {
397 __u16 auth_keynumber;
398 __u16 auth_altkeynumber;
399 __u32 auth_indication;
400 sctp_assoc_t auth_assoc_id;
403 enum { SCTP_AUTH_NEWKEY = 0, };
407 * Described in Section 7.3
408 * Ancillary Data and Notification Interest Options
410 struct sctp_event_subscribe {
411 __u8 sctp_data_io_event;
412 __u8 sctp_association_event;
413 __u8 sctp_address_event;
414 __u8 sctp_send_failure_event;
415 __u8 sctp_peer_error_event;
416 __u8 sctp_shutdown_event;
417 __u8 sctp_partial_delivery_event;
418 __u8 sctp_adaptation_layer_event;
419 __u8 sctp_authentication_event;
423 * 5.3.1 SCTP Notification Structure
425 * The notification structure is defined as the union of all
426 * notification types.
429 union sctp_notification {
431 __u16 sn_type; /* Notification type. */
435 struct sctp_assoc_change sn_assoc_change;
436 struct sctp_paddr_change sn_paddr_change;
437 struct sctp_remote_error sn_remote_error;
438 struct sctp_send_failed sn_send_failed;
439 struct sctp_shutdown_event sn_shutdown_event;
440 struct sctp_adaptation_event sn_adaptation_event;
441 struct sctp_pdapi_event sn_pdapi_event;
442 struct sctp_authkey_event sn_authkey_event;
446 * All standard values for sn_type flags are greater than 2^15.
447 * Values from 2^15 and down are reserved.
451 SCTP_SN_TYPE_BASE = (1<<15),
453 SCTP_PEER_ADDR_CHANGE,
457 SCTP_PARTIAL_DELIVERY_EVENT,
458 SCTP_ADAPTATION_INDICATION,
459 SCTP_AUTHENTICATION_INDICATION,
462 /* Notification error codes used to fill up the error fields in some
464 * SCTP_PEER_ADDRESS_CHAGE : spc_error
465 * SCTP_ASSOC_CHANGE : sac_error
466 * These names should be potentially included in the draft 04 of the SCTP
467 * sockets API specification.
469 typedef enum sctp_sn_error {
470 SCTP_FAILED_THRESHOLD,
472 SCTP_HEARTBEAT_SUCCESS,
473 SCTP_RESPONSE_TO_USER_REQ,
475 SCTP_SHUTDOWN_GUARD_EXPIRES,
480 * 7.1.1 Retransmission Timeout Parameters (SCTP_RTOINFO)
482 * The protocol parameters used to initialize and bound retransmission
483 * timeout (RTO) are tunable. See [SCTP] for more information on how
484 * these parameters are used in RTO calculation.
486 struct sctp_rtoinfo {
487 sctp_assoc_t srto_assoc_id;
494 * 7.1.2 Association Parameters (SCTP_ASSOCINFO)
496 * This option is used to both examine and set various association and
497 * endpoint parameters.
499 struct sctp_assocparams {
500 sctp_assoc_t sasoc_assoc_id;
501 __u16 sasoc_asocmaxrxt;
502 __u16 sasoc_number_peer_destinations;
503 __u32 sasoc_peer_rwnd;
504 __u32 sasoc_local_rwnd;
505 __u32 sasoc_cookie_life;
509 * 7.1.9 Set Peer Primary Address (SCTP_SET_PEER_PRIMARY_ADDR)
511 * Requests that the peer mark the enclosed address as the association
512 * primary. The enclosed address must be one of the association's
513 * locally bound addresses. The following structure is used to make a
514 * set primary request:
516 struct sctp_setpeerprim {
517 sctp_assoc_t sspp_assoc_id;
518 struct sockaddr_storage sspp_addr;
519 } __attribute__((packed, aligned(4)));
522 * 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR)
524 * Requests that the local SCTP stack use the enclosed peer address as
525 * the association primary. The enclosed address must be one of the
526 * association peer's addresses. The following structure is used to
527 * make a set peer primary request:
530 sctp_assoc_t ssp_assoc_id;
531 struct sockaddr_storage ssp_addr;
532 } __attribute__((packed, aligned(4)));
535 * 7.1.11 Set Adaptation Layer Indicator (SCTP_ADAPTATION_LAYER)
537 * Requests that the local endpoint set the specified Adaptation Layer
538 * Indication parameter for all future INIT and INIT-ACK exchanges.
540 struct sctp_setadaptation {
541 __u32 ssb_adaptation_ind;
545 * 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS)
547 * Applications can enable or disable heartbeats for any peer address
548 * of an association, modify an address's heartbeat interval, force a
549 * heartbeat to be sent immediately, and adjust the address's maximum
550 * number of retransmissions sent before an address is considered
551 * unreachable. The following structure is used to access and modify an
552 * address's parameters:
554 enum sctp_spp_flags {
555 SPP_HB_ENABLE = 1<<0, /*Enable heartbeats*/
556 SPP_HB_DISABLE = 1<<1, /*Disable heartbeats*/
557 SPP_HB = SPP_HB_ENABLE | SPP_HB_DISABLE,
558 SPP_HB_DEMAND = 1<<2, /*Send heartbeat immediately*/
559 SPP_PMTUD_ENABLE = 1<<3, /*Enable PMTU discovery*/
560 SPP_PMTUD_DISABLE = 1<<4, /*Disable PMTU discovery*/
561 SPP_PMTUD = SPP_PMTUD_ENABLE | SPP_PMTUD_DISABLE,
562 SPP_SACKDELAY_ENABLE = 1<<5, /*Enable SACK*/
563 SPP_SACKDELAY_DISABLE = 1<<6, /*Disable SACK*/
564 SPP_SACKDELAY = SPP_SACKDELAY_ENABLE | SPP_SACKDELAY_DISABLE,
565 SPP_HB_TIME_IS_ZERO = 1<<7, /* Set HB delay to 0 */
568 struct sctp_paddrparams {
569 sctp_assoc_t spp_assoc_id;
570 struct sockaddr_storage spp_address;
571 __u32 spp_hbinterval;
572 __u16 spp_pathmaxrxt;
576 } __attribute__((packed, aligned(4)));
579 * 7.1.18. Add a chunk that must be authenticated (SCTP_AUTH_CHUNK)
581 * This set option adds a chunk type that the user is requesting to be
582 * received only in an authenticated way. Changes to the list of chunks
583 * will only effect future associations on the socket.
585 struct sctp_authchunk {
590 * 7.1.19. Get or set the list of supported HMAC Identifiers (SCTP_HMAC_IDENT)
592 * This option gets or sets the list of HMAC algorithms that the local
593 * endpoint requires the peer to use.
595 struct sctp_hmacalgo {
596 __u32 shmac_num_idents;
597 __u16 shmac_idents[];
601 * 7.1.20. Set a shared key (SCTP_AUTH_KEY)
603 * This option will set a shared secret key which is used to build an
604 * association shared key.
606 struct sctp_authkey {
607 sctp_assoc_t sca_assoc_id;
614 * 7.1.21. Get or set the active shared key (SCTP_AUTH_ACTIVE_KEY)
616 * This option will get or set the active shared key to be used to build
617 * the association shared key.
620 struct sctp_authkeyid {
621 sctp_assoc_t scact_assoc_id;
622 __u16 scact_keynumber;
627 * 7.1.23. Get or set delayed ack timer (SCTP_DELAYED_SACK)
629 * This option will effect the way delayed acks are performed. This
630 * option allows you to get or set the delayed ack time, in
631 * milliseconds. It also allows changing the delayed ack frequency.
632 * Changing the frequency to 1 disables the delayed sack algorithm. If
633 * the assoc_id is 0, then this sets or gets the endpoints default
634 * values. If the assoc_id field is non-zero, then the set or get
635 * effects the specified association for the one to many model (the
636 * assoc_id field is ignored by the one to one model). Note that if
637 * sack_delay or sack_freq are 0 when setting this option, then the
638 * current values will remain unchanged.
640 struct sctp_sack_info {
641 sctp_assoc_t sack_assoc_id;
646 struct sctp_assoc_value {
647 sctp_assoc_t assoc_id;
648 uint32_t assoc_value;
652 * 7.2.2 Peer Address Information
654 * Applications can retrieve information about a specific peer address
655 * of an association, including its reachability state, congestion
656 * window, and retransmission timer values. This information is
657 * read-only. The following structure is used to access this
660 struct sctp_paddrinfo {
661 sctp_assoc_t spinfo_assoc_id;
662 struct sockaddr_storage spinfo_address;
668 } __attribute__((packed, aligned(4)));
670 /* Peer addresses's state. */
671 /* UNKNOWN: Peer address passed by the upper layer in sendmsg or connect[x]
673 * UNCONFIRMED: Peer address received in INIT/INIT-ACK address parameters.
674 * Not yet confirmed by a heartbeat and not available for data
676 * ACTIVE : Peer address confirmed, active and available for data transfers.
677 * INACTIVE: Peer address inactive and not available for data transfers.
679 enum sctp_spinfo_state {
683 SCTP_UNKNOWN = 0xffff /* Value used for transport state unknown */
687 * 7.2.1 Association Status (SCTP_STATUS)
689 * Applications can retrieve current status information about an
690 * association, including association state, peer receiver window size,
691 * number of unacked data chunks, and number of data chunks pending
692 * receipt. This information is read-only. The following structure is
693 * used to access this information:
696 sctp_assoc_t sstat_assoc_id;
699 __u16 sstat_unackdata;
700 __u16 sstat_penddata;
702 __u16 sstat_outstrms;
703 __u32 sstat_fragmentation_point;
704 struct sctp_paddrinfo sstat_primary;
708 * 7.2.3. Get the list of chunks the peer requires to be authenticated
709 * (SCTP_PEER_AUTH_CHUNKS)
711 * This option gets a list of chunks for a specified association that
712 * the peer requires to be received authenticated only.
714 struct sctp_authchunks {
715 sctp_assoc_t gauth_assoc_id;
716 __u32 gauth_number_of_chunks;
717 uint8_t gauth_chunks[];
721 * 8.3, 8.5 get all peer/local addresses in an association.
722 * This parameter struct is used by SCTP_GET_PEER_ADDRS and
723 * SCTP_GET_LOCAL_ADDRS socket options used internally to implement
724 * sctp_getpaddrs() and sctp_getladdrs() API.
726 struct sctp_getaddrs_old {
727 sctp_assoc_t assoc_id;
729 struct sockaddr __user *addrs;
731 struct sctp_getaddrs {
732 sctp_assoc_t assoc_id; /*input*/
733 __u32 addr_num; /*output*/
734 __u8 addrs[0]; /*output, variable size*/
737 /* These are bit fields for msghdr->msg_flags. See section 5.1. */
738 /* On user space Linux, these live in <bits/socket.h> as an enum. */
739 enum sctp_msg_flags {
740 MSG_NOTIFICATION = 0x8000,
741 #define MSG_NOTIFICATION MSG_NOTIFICATION
747 * The flags parameter is formed from the bitwise OR of zero or more of the
748 * following currently defined flags:
750 #define SCTP_BINDX_ADD_ADDR 0x01
751 #define SCTP_BINDX_REM_ADDR 0x02
753 /* This is the structure that is passed as an argument(optval) to
754 * getsockopt(SCTP_SOCKOPT_PEELOFF).
757 sctp_assoc_t associd;
759 } sctp_peeloff_arg_t;
761 #endif /* __net_sctp_user_h__ */