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/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ /* 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, see * <http://www.gnu.org/licenses/>. * * Please send any bug reports or fixes you make to the * email address(es): * lksctp developers <linux-sctp@vger.kernel.org> * * 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> * Inaky Perez-Gonzalez <inaky.gonzalez@intel.com> * Vlad Yasevich <vladislav.yasevich@hp.com> * * Any bugs reported given to us we will try to fix... any fixes shared will * be incorporated into the next SCTP release. */ #ifndef _SCTP_H #define _SCTP_H #include <linux/types.h> #include <linux/socket.h> typedef __s32 sctp_assoc_t; #define SCTP_FUTURE_ASSOC 0 #define SCTP_CURRENT_ASSOC 1 #define SCTP_ALL_ASSOC 2 /* The following symbols come from the Sockets API Extensions for * SCTP <draft-ietf-tsvwg-sctpsocket-07.txt>. */ #define SCTP_RTOINFO 0 #define SCTP_ASSOCINFO 1 #define SCTP_INITMSG 2 #define SCTP_NODELAY 3 /* Get/set nodelay option. */ #define SCTP_AUTOCLOSE 4 #define SCTP_SET_PEER_PRIMARY_ADDR 5 #define SCTP_PRIMARY_ADDR 6 #define SCTP_ADAPTATION_LAYER 7 #define SCTP_DISABLE_FRAGMENTS 8 #define SCTP_PEER_ADDR_PARAMS 9 #define SCTP_DEFAULT_SEND_PARAM 10 #define SCTP_EVENTS 11 #define SCTP_I_WANT_MAPPED_V4_ADDR 12 /* Turn on/off mapped v4 addresses */ #define SCTP_MAXSEG 13 /* Get/set maximum fragment. */ #define SCTP_STATUS 14 #define SCTP_GET_PEER_ADDR_INFO 15 #define SCTP_DELAYED_ACK_TIME 16 #define SCTP_DELAYED_ACK SCTP_DELAYED_ACK_TIME #define SCTP_DELAYED_SACK SCTP_DELAYED_ACK_TIME #define SCTP_CONTEXT 17 #define SCTP_FRAGMENT_INTERLEAVE 18 #define SCTP_PARTIAL_DELIVERY_POINT 19 /* Set/Get partial delivery point */ #define SCTP_MAX_BURST 20 /* Set/Get max burst */ #define SCTP_AUTH_CHUNK 21 /* Set only: add a chunk type to authenticate */ #define SCTP_HMAC_IDENT 22 #define SCTP_AUTH_KEY 23 #define SCTP_AUTH_ACTIVE_KEY 24 #define SCTP_AUTH_DELETE_KEY 25 #define SCTP_PEER_AUTH_CHUNKS 26 /* Read only */ #define SCTP_LOCAL_AUTH_CHUNKS 27 /* Read only */ #define SCTP_GET_ASSOC_NUMBER 28 /* Read only */ #define SCTP_GET_ASSOC_ID_LIST 29 /* Read only */ #define SCTP_AUTO_ASCONF 30 #define SCTP_PEER_ADDR_THLDS 31 #define SCTP_RECVRCVINFO 32 #define SCTP_RECVNXTINFO 33 #define SCTP_DEFAULT_SNDINFO 34 #define SCTP_AUTH_DEACTIVATE_KEY 35 #define SCTP_REUSE_PORT 36 #define SCTP_PEER_ADDR_THLDS_V2 37 /* Internal Socket Options. Some of the sctp library functions are * implemented using these socket options. */ #define SCTP_SOCKOPT_BINDX_ADD 100 /* BINDX requests for adding addrs */ #define SCTP_SOCKOPT_BINDX_REM 101 /* BINDX requests for removing addrs. */ #define SCTP_SOCKOPT_PEELOFF 102 /* peel off association. */ /* Options 104-106 are deprecated and removed. Do not use this space */ #define SCTP_SOCKOPT_CONNECTX_OLD 107 /* CONNECTX old requests. */ #define SCTP_GET_PEER_ADDRS 108 /* Get all peer address. */ #define SCTP_GET_LOCAL_ADDRS 109 /* Get all local address. */ #define SCTP_SOCKOPT_CONNECTX 110 /* CONNECTX requests. */ #define SCTP_SOCKOPT_CONNECTX3 111 /* CONNECTX requests (updated) */ #define SCTP_GET_ASSOC_STATS 112 /* Read only */ #define SCTP_PR_SUPPORTED 113 #define SCTP_DEFAULT_PRINFO 114 #define SCTP_PR_ASSOC_STATUS 115 #define SCTP_PR_STREAM_STATUS 116 #define SCTP_RECONFIG_SUPPORTED 117 #define SCTP_ENABLE_STREAM_RESET 118 #define SCTP_RESET_STREAMS 119 #define SCTP_RESET_ASSOC 120 #define SCTP_ADD_STREAMS 121 #define SCTP_SOCKOPT_PEELOFF_FLAGS 122 #define SCTP_STREAM_SCHEDULER 123 #define SCTP_STREAM_SCHEDULER_VALUE 124 #define SCTP_INTERLEAVING_SUPPORTED 125 #define SCTP_SENDMSG_CONNECT 126 #define SCTP_EVENT 127 #define SCTP_ASCONF_SUPPORTED 128 #define SCTP_AUTH_SUPPORTED 129 #define SCTP_ECN_SUPPORTED 130 #define SCTP_EXPOSE_POTENTIALLY_FAILED_STATE 131 #define SCTP_EXPOSE_PF_STATE SCTP_EXPOSE_POTENTIALLY_FAILED_STATE #define SCTP_REMOTE_UDP_ENCAPS_PORT 132 #define SCTP_PLPMTUD_PROBE_INTERVAL 133 /* PR-SCTP policies */ #define SCTP_PR_SCTP_NONE 0x0000 #define SCTP_PR_SCTP_TTL 0x0010 #define SCTP_PR_SCTP_RTX 0x0020 #define SCTP_PR_SCTP_PRIO 0x0030 #define SCTP_PR_SCTP_MAX SCTP_PR_SCTP_PRIO #define SCTP_PR_SCTP_MASK 0x0030 #define __SCTP_PR_INDEX(x) ((x >> 4) - 1) #define SCTP_PR_INDEX(x) __SCTP_PR_INDEX(SCTP_PR_SCTP_ ## x) #define SCTP_PR_POLICY(x) ((x) & SCTP_PR_SCTP_MASK) #define SCTP_PR_SET_POLICY(flags, x) \ do { \ flags &= ~SCTP_PR_SCTP_MASK; \ flags |= x; \ } while (0) #define SCTP_PR_TTL_ENABLED(x) (SCTP_PR_POLICY(x) == SCTP_PR_SCTP_TTL) #define SCTP_PR_RTX_ENABLED(x) (SCTP_PR_POLICY(x) == SCTP_PR_SCTP_RTX) #define SCTP_PR_PRIO_ENABLED(x) (SCTP_PR_POLICY(x) == SCTP_PR_SCTP_PRIO) /* For enable stream reset */ #define SCTP_ENABLE_RESET_STREAM_REQ 0x01 #define SCTP_ENABLE_RESET_ASSOC_REQ 0x02 #define SCTP_ENABLE_CHANGE_ASSOC_REQ 0x04 #define SCTP_ENABLE_STRRESET_MASK 0x07 #define SCTP_STREAM_RESET_INCOMING 0x01 #define SCTP_STREAM_RESET_OUTGOING 0x02 /* 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 }; /* 5.3.1 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; }; /* 5.3.2 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; }; /* 5.3.4 SCTP Send Information Structure (SCTP_SNDINFO) * * This cmsghdr structure specifies SCTP options for sendmsg(). * * cmsg_level cmsg_type cmsg_data[] * ------------ ------------ ------------------- * IPPROTO_SCTP SCTP_SNDINFO struct sctp_sndinfo */ struct sctp_sndinfo { __u16 snd_sid; __u16 snd_flags; __u32 snd_ppid; __u32 snd_context; sctp_assoc_t snd_assoc_id; }; /* 5.3.5 SCTP Receive Information Structure (SCTP_RCVINFO) * * This cmsghdr structure describes SCTP receive information * about a received message through recvmsg(). * * cmsg_level cmsg_type cmsg_data[] * ------------ ------------ ------------------- * IPPROTO_SCTP SCTP_RCVINFO struct sctp_rcvinfo */ struct sctp_rcvinfo { __u16 rcv_sid; __u16 rcv_ssn; __u16 rcv_flags; __u32 rcv_ppid; __u32 rcv_tsn; __u32 rcv_cumtsn; __u32 rcv_context; sctp_assoc_t rcv_assoc_id; }; /* 5.3.6 SCTP Next Receive Information Structure (SCTP_NXTINFO) * * This cmsghdr structure describes SCTP receive information * of the next message that will be delivered through recvmsg() * if this information is already available when delivering * the current message. * * cmsg_level cmsg_type cmsg_data[] * ------------ ------------ ------------------- * IPPROTO_SCTP SCTP_NXTINFO struct sctp_nxtinfo */ struct sctp_nxtinfo { __u16 nxt_sid; __u16 nxt_flags; __u32 nxt_ppid; __u32 nxt_length; sctp_assoc_t nxt_assoc_id; }; /* 5.3.7 SCTP PR-SCTP Information Structure (SCTP_PRINFO) * * This cmsghdr structure specifies SCTP options for sendmsg(). * * cmsg_level cmsg_type cmsg_data[] * ------------ ------------ ------------------- * IPPROTO_SCTP SCTP_PRINFO struct sctp_prinfo */ struct sctp_prinfo { __u16 pr_policy; __u32 pr_value; }; /* 5.3.8 SCTP AUTH Information Structure (SCTP_AUTHINFO) * * This cmsghdr structure specifies SCTP options for sendmsg(). * * cmsg_level cmsg_type cmsg_data[] * ------------ ------------ ------------------- * IPPROTO_SCTP SCTP_AUTHINFO struct sctp_authinfo */ struct sctp_authinfo { __u16 auth_keynumber; }; /* * 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 << 0), /* Send/receive message unordered. */ SCTP_ADDR_OVER = (1 << 1), /* Override the primary destination. */ SCTP_ABORT = (1 << 2), /* Send an ABORT message to the peer. */ SCTP_SACK_IMMEDIATELY = (1 << 3), /* SACK should be sent without delay. */ /* 2 bits here have been used by SCTP_PR_SCTP_MASK */ SCTP_SENDALL = (1 << 6), SCTP_PR_SCTP_ALL = (1 << 7), SCTP_NOTIFICATION = MSG_NOTIFICATION, /* Next message is not user msg but notification. */ SCTP_EOF = MSG_FIN, /* Initiate graceful shutdown process. */ }; typedef union { __u8 raw; struct sctp_initmsg init; struct sctp_sndrcvinfo sndrcv; } sctp_cmsg_data_t; /* These are cmsg_types. */ typedef enum sctp_cmsg_type { SCTP_INIT, /* 5.2.1 SCTP Initiation Structure */ #define SCTP_INIT SCTP_INIT SCTP_SNDRCV, /* 5.2.2 SCTP Header Information Structure */ #define SCTP_SNDRCV SCTP_SNDRCV SCTP_SNDINFO, /* 5.3.4 SCTP Send Information Structure */ #define SCTP_SNDINFO SCTP_SNDINFO SCTP_RCVINFO, /* 5.3.5 SCTP Receive Information Structure */ #define SCTP_RCVINFO SCTP_RCVINFO SCTP_NXTINFO, /* 5.3.6 SCTP Next Receive Information Structure */ #define SCTP_NXTINFO SCTP_NXTINFO SCTP_PRINFO, /* 5.3.7 SCTP PR-SCTP Information Structure */ #define SCTP_PRINFO SCTP_PRINFO SCTP_AUTHINFO, /* 5.3.8 SCTP AUTH Information Structure */ #define SCTP_AUTHINFO SCTP_AUTHINFO SCTP_DSTADDRV4, /* 5.3.9 SCTP Destination IPv4 Address Structure */ #define SCTP_DSTADDRV4 SCTP_DSTADDRV4 SCTP_DSTADDRV6, /* 5.3.10 SCTP Destination IPv6 Address Structure */ #define SCTP_DSTADDRV6 SCTP_DSTADDRV6 } 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[]; }; /* * 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, SCTP_ADDR_POTENTIALLY_FAILED, #define SCTP_ADDR_PF SCTP_ADDR_POTENTIALLY_FAILED }; /* * 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; __be16 sre_error; sctp_assoc_t sre_assoc_id; __u8 sre_data[]; }; /* * 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[]; }; struct sctp_send_failed_event { __u16 ssf_type; __u16 ssf_flags; __u32 ssf_length; __u32 ssf_error; struct sctp_sndinfo ssfe_info; sctp_assoc_t ssf_assoc_id; __u8 ssf_data[]; }; /* * 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; __u32 pdapi_stream; __u32 pdapi_seq; }; enum { SCTP_PARTIAL_DELIVERY_ABORTED=0, }; /* * 5.3.1.8. SCTP_AUTHENTICATION_EVENT * * When a receiver is using authentication this message will provide * notifications regarding new keys being made active as well as errors. */ 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_NEW_KEY, #define SCTP_AUTH_NEWKEY SCTP_AUTH_NEW_KEY /* compatible with before */ SCTP_AUTH_FREE_KEY, SCTP_AUTH_NO_AUTH, }; /* * 6.1.9. SCTP_SENDER_DRY_EVENT * * When the SCTP stack has no more user data to send or retransmit, this * notification is given to the user. Also, at the time when a user app * subscribes to this event, if there is no data to be sent or * retransmit, the stack will immediately send up this notification. */ struct sctp_sender_dry_event { __u16 sender_dry_type; __u16 sender_dry_flags; __u32 sender_dry_length; sctp_assoc_t sender_dry_assoc_id; }; #define SCTP_STREAM_RESET_INCOMING_SSN 0x0001 #define SCTP_STREAM_RESET_OUTGOING_SSN 0x0002 #define SCTP_STREAM_RESET_DENIED 0x0004 #define SCTP_STREAM_RESET_FAILED 0x0008 struct sctp_stream_reset_event { __u16 strreset_type; __u16 strreset_flags; __u32 strreset_length; sctp_assoc_t strreset_assoc_id; __u16 strreset_stream_list[]; }; #define SCTP_ASSOC_RESET_DENIED 0x0004 #define SCTP_ASSOC_RESET_FAILED 0x0008 struct sctp_assoc_reset_event { __u16 assocreset_type; __u16 assocreset_flags; __u32 assocreset_length; sctp_assoc_t assocreset_assoc_id; __u32 assocreset_local_tsn; __u32 assocreset_remote_tsn; }; #define SCTP_ASSOC_CHANGE_DENIED 0x0004 #define SCTP_ASSOC_CHANGE_FAILED 0x0008 #define SCTP_STREAM_CHANGE_DENIED SCTP_ASSOC_CHANGE_DENIED #define SCTP_STREAM_CHANGE_FAILED SCTP_ASSOC_CHANGE_FAILED struct sctp_stream_change_event { __u16 strchange_type; __u16 strchange_flags; __u32 strchange_length; sctp_assoc_t strchange_assoc_id; __u16 strchange_instrms; __u16 strchange_outstrms; }; /* * 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; __u8 sctp_sender_dry_event; __u8 sctp_stream_reset_event; __u8 sctp_assoc_reset_event; __u8 sctp_stream_change_event; __u8 sctp_send_failure_event_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; struct sctp_sender_dry_event sn_sender_dry_event; struct sctp_stream_reset_event sn_strreset_event; struct sctp_assoc_reset_event sn_assocreset_event; struct sctp_stream_change_event sn_strchange_event; struct sctp_send_failed_event sn_send_failed_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_DATA_IO_EVENT = SCTP_SN_TYPE_BASE, #define SCTP_DATA_IO_EVENT SCTP_DATA_IO_EVENT SCTP_ASSOC_CHANGE, #define SCTP_ASSOC_CHANGE SCTP_ASSOC_CHANGE SCTP_PEER_ADDR_CHANGE, #define SCTP_PEER_ADDR_CHANGE SCTP_PEER_ADDR_CHANGE SCTP_SEND_FAILED, #define SCTP_SEND_FAILED SCTP_SEND_FAILED SCTP_REMOTE_ERROR, #define SCTP_REMOTE_ERROR SCTP_REMOTE_ERROR SCTP_SHUTDOWN_EVENT, #define SCTP_SHUTDOWN_EVENT SCTP_SHUTDOWN_EVENT SCTP_PARTIAL_DELIVERY_EVENT, #define SCTP_PARTIAL_DELIVERY_EVENT SCTP_PARTIAL_DELIVERY_EVENT SCTP_ADAPTATION_INDICATION, #define SCTP_ADAPTATION_INDICATION SCTP_ADAPTATION_INDICATION SCTP_AUTHENTICATION_EVENT, #define SCTP_AUTHENTICATION_INDICATION SCTP_AUTHENTICATION_EVENT SCTP_SENDER_DRY_EVENT, #define SCTP_SENDER_DRY_EVENT SCTP_SENDER_DRY_EVENT SCTP_STREAM_RESET_EVENT, #define SCTP_STREAM_RESET_EVENT SCTP_STREAM_RESET_EVENT SCTP_ASSOC_RESET_EVENT, #define SCTP_ASSOC_RESET_EVENT SCTP_ASSOC_RESET_EVENT SCTP_STREAM_CHANGE_EVENT, #define SCTP_STREAM_CHANGE_EVENT SCTP_STREAM_CHANGE_EVENT SCTP_SEND_FAILED_EVENT, #define SCTP_SEND_FAILED_EVENT SCTP_SEND_FAILED_EVENT SCTP_SN_TYPE_MAX = SCTP_SEND_FAILED_EVENT, #define SCTP_SN_TYPE_MAX SCTP_SN_TYPE_MAX }; /* 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))); /* For backward compatibility use, define the old name too */ #define sctp_setprim sctp_prim /* * 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 */ SPP_IPV6_FLOWLABEL = 1<<8, SPP_DSCP = 1<<9, }; 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; __u32 spp_ipv6_flowlabel; __u8 spp_dscp; } __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. */ /* This here is only used by user space as is. It might not be a good idea * to export/reveal the whole structure with reserved fields etc. */ enum { SCTP_AUTH_HMAC_ID_SHA1 = 1, SCTP_AUTH_HMAC_ID_SHA256 = 3, }; struct sctp_hmacalgo { __u32 shmac_num_idents; __u16 shmac_idents[]; }; /* Sadly, user and kernel space have different names for * this structure member, so this is to not break anything. */ #define shmac_number_of_idents shmac_num_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; }; struct sctp_stream_value { sctp_assoc_t assoc_id; uint16_t stream_id; uint16_t stream_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_PF, #define SCTP_POTENTIALLY_FAILED SCTP_PF 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[]; }; /* The broken spelling has been released already in lksctp-tools header, * so don't break anyone, now that it's fixed. */ #define guth_number_of_chunks gauth_number_of_chunks /* Association states. */ enum sctp_sstat_state { SCTP_EMPTY = 0, SCTP_CLOSED = 1, SCTP_COOKIE_WAIT = 2, SCTP_COOKIE_ECHOED = 3, SCTP_ESTABLISHED = 4, SCTP_SHUTDOWN_PENDING = 5, SCTP_SHUTDOWN_SENT = 6, SCTP_SHUTDOWN_RECEIVED = 7, SCTP_SHUTDOWN_ACK_SENT = 8, }; /* * 8.2.6. Get the Current Identifiers of Associations * (SCTP_GET_ASSOC_ID_LIST) * * This option gets the current list of SCTP association identifiers of * the SCTP associations handled by a one-to-many style socket. */ struct sctp_assoc_ids { __u32 gaids_number_of_ids; sctp_assoc_t gaids_assoc_id[]; }; /* * 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 *addrs; }; struct sctp_getaddrs { sctp_assoc_t assoc_id; /*input*/ __u32 addr_num; /*output*/ __u8 addrs[]; /*output, variable size*/ }; /* A socket user request obtained via SCTP_GET_ASSOC_STATS that retrieves * association stats. All stats are counts except sas_maxrto and * sas_obs_rto_ipaddr. maxrto is the max observed rto + transport since * the last call. Will return 0 when RTO was not update since last call */ struct sctp_assoc_stats { sctp_assoc_t sas_assoc_id; /* Input */ /* Transport of observed max RTO */ struct sockaddr_storage sas_obs_rto_ipaddr; __u64 sas_maxrto; /* Maximum Observed RTO for period */ __u64 sas_isacks; /* SACKs received */ __u64 sas_osacks; /* SACKs sent */ __u64 sas_opackets; /* Packets sent */ __u64 sas_ipackets; /* Packets received */ __u64 sas_rtxchunks; /* Retransmitted Chunks */ __u64 sas_outofseqtsns;/* TSN received > next expected */ __u64 sas_idupchunks; /* Dups received (ordered+unordered) */ __u64 sas_gapcnt; /* Gap Acknowledgements Received */ __u64 sas_ouodchunks; /* Unordered data chunks sent */ __u64 sas_iuodchunks; /* Unordered data chunks received */ __u64 sas_oodchunks; /* Ordered data chunks sent */ __u64 sas_iodchunks; /* Ordered data chunks received */ __u64 sas_octrlchunks; /* Control chunks sent */ __u64 sas_ictrlchunks; /* Control chunks received */ }; /* * 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; typedef struct { sctp_peeloff_arg_t p_arg; unsigned flags; } sctp_peeloff_flags_arg_t; /* * Peer Address Thresholds socket option */ struct sctp_paddrthlds { sctp_assoc_t spt_assoc_id; struct sockaddr_storage spt_address; __u16 spt_pathmaxrxt; __u16 spt_pathpfthld; }; /* Use a new structure with spt_pathcpthld for back compatibility */ struct sctp_paddrthlds_v2 { sctp_assoc_t spt_assoc_id; struct sockaddr_storage spt_address; __u16 spt_pathmaxrxt; __u16 spt_pathpfthld; __u16 spt_pathcpthld; }; /* * Socket Option for Getting the Association/Stream-Specific PR-SCTP Status */ struct sctp_prstatus { sctp_assoc_t sprstat_assoc_id; __u16 sprstat_sid; __u16 sprstat_policy; __u64 sprstat_abandoned_unsent; __u64 sprstat_abandoned_sent; }; struct sctp_default_prinfo { sctp_assoc_t pr_assoc_id; __u32 pr_value; __u16 pr_policy; }; struct sctp_info { __u32 sctpi_tag; __u32 sctpi_state; __u32 sctpi_rwnd; __u16 sctpi_unackdata; __u16 sctpi_penddata; __u16 sctpi_instrms; __u16 sctpi_outstrms; __u32 sctpi_fragmentation_point; __u32 sctpi_inqueue; __u32 sctpi_outqueue; __u32 sctpi_overall_error; __u32 sctpi_max_burst; __u32 sctpi_maxseg; __u32 sctpi_peer_rwnd; __u32 sctpi_peer_tag; __u8 sctpi_peer_capable; __u8 sctpi_peer_sack; __u16 __reserved1; /* assoc status info */ __u64 sctpi_isacks; __u64 sctpi_osacks; __u64 sctpi_opackets; __u64 sctpi_ipackets; __u64 sctpi_rtxchunks; __u64 sctpi_outofseqtsns; __u64 sctpi_idupchunks; __u64 sctpi_gapcnt; __u64 sctpi_ouodchunks; __u64 sctpi_iuodchunks; __u64 sctpi_oodchunks; __u64 sctpi_iodchunks; __u64 sctpi_octrlchunks; __u64 sctpi_ictrlchunks; /* primary transport info */ struct sockaddr_storage sctpi_p_address; __s32 sctpi_p_state; __u32 sctpi_p_cwnd; __u32 sctpi_p_srtt; __u32 sctpi_p_rto; __u32 sctpi_p_hbinterval; __u32 sctpi_p_pathmaxrxt; __u32 sctpi_p_sackdelay; __u32 sctpi_p_sackfreq; __u32 sctpi_p_ssthresh; __u32 sctpi_p_partial_bytes_acked; __u32 sctpi_p_flight_size; __u16 sctpi_p_error; __u16 __reserved2; /* sctp sock info */ __u32 sctpi_s_autoclose; __u32 sctpi_s_adaptation_ind; __u32 sctpi_s_pd_point; __u8 sctpi_s_nodelay; __u8 sctpi_s_disable_fragments; __u8 sctpi_s_v4mapped; __u8 sctpi_s_frag_interleave; __u32 sctpi_s_type; __u32 __reserved3; }; struct sctp_reset_streams { sctp_assoc_t srs_assoc_id; uint16_t srs_flags; uint16_t srs_number_streams; /* 0 == ALL */ uint16_t srs_stream_list[]; /* list if srs_num_streams is not 0 */ }; struct sctp_add_streams { sctp_assoc_t sas_assoc_id; uint16_t sas_instrms; uint16_t sas_outstrms; }; struct sctp_event { sctp_assoc_t se_assoc_id; uint16_t se_type; uint8_t se_on; }; struct sctp_udpencaps { sctp_assoc_t sue_assoc_id; struct sockaddr_storage sue_address; uint16_t sue_port; }; /* SCTP Stream schedulers */ enum sctp_sched_type { SCTP_SS_FCFS, SCTP_SS_DEFAULT = SCTP_SS_FCFS, SCTP_SS_PRIO, SCTP_SS_RR, SCTP_SS_FC, SCTP_SS_WFQ, SCTP_SS_MAX = SCTP_SS_WFQ }; /* Probe Interval socket option */ struct sctp_probeinterval { sctp_assoc_t spi_assoc_id; struct sockaddr_storage spi_address; __u32 spi_interval; }; #endif /* _SCTP_H */