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-/* SCTP kernel reference Implementation
- * (C) Copyright IBM Corp. 2001, 2004
- * Copyright (c) 1999-2000 Cisco, Inc.
- * Copyright (c) 1999-2001 Motorola, Inc.
- * Copyright (c) 2001 Intel Corp.
- * Copyright (c) 2001 Nokia, Inc.
- * Copyright (c) 2001 La Monte H.P. Yarroll
- *
- * This file is part of the SCTP kernel reference Implementation
- *
- * Various protocol defined structures.
- *
- * This SCTP implementation is free software;
- * you can redistribute it and/or modify it under the terms of
- * the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This SCTP implementation is distributed in the hope that it
- * will be useful, but WITHOUT ANY WARRANTY; without even the implied
- * ************************
- * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- * See the GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with GNU CC; see the file COPYING. If not, write to
- * the Free Software Foundation, 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- *
- * Please send any bug reports or fixes you make to the
- * email address(es):
- * lksctp developers <lksctp-developerst@lists.sourceforge.net>
- *
- * Or submit a bug report through the following website:
- * http://www.sf.net/projects/lksctp
- *
- * Written or modified by:
- * La Monte H.P. Yarroll <piggy@acm.org>
- * Karl Knutson <karl@athena.chicago.il.us>
- * Jon Grimm <jgrimm@us.ibm.com>
- * Xingang Guo <xingang.guo@intel.com>
- * randall@sctp.chicago.il.us
- * kmorneau@cisco.com
- * qxie1@email.mot.com
- * Sridhar Samudrala <sri@us.ibm.com>
- * Kevin Gao <kevin.gao@intel.com>
- *
- * Any bugs reported given to us we will try to fix... any fixes shared will
- * be incorporated into the next SCTP release.
- */
-#ifndef __LINUX_SCTP_H__
-#define __LINUX_SCTP_H__
-
-#include <linux/in.h> /* We need in_addr. */
-#include <linux/in6.h> /* We need in6_addr. */
-
-
-/* Section 3.1. SCTP Common Header Format */
-typedef struct sctphdr {
- __be16 source;
- __be16 dest;
- __be32 vtag;
- __le32 checksum;
-} __packed sctp_sctphdr_t;
-
-#ifdef __KERNEL__
-#include <linux/skbuff.h>
-
-static inline struct sctphdr *sctp_hdr(const struct sk_buff *skb)
-{
- return (struct sctphdr *)skb_transport_header(skb);
-}
-#endif
-
-/* Section 3.2. Chunk Field Descriptions. */
-typedef struct sctp_chunkhdr {
- __u8 type;
- __u8 flags;
- __be16 length;
-} __packed sctp_chunkhdr_t;
-
-
-/* Section 3.2. Chunk Type Values.
- * [Chunk Type] identifies the type of information contained in the Chunk
- * Value field. It takes a value from 0 to 254. The value of 255 is
- * reserved for future use as an extension field.
- */
-typedef enum {
- SCTP_CID_DATA = 0,
- SCTP_CID_INIT = 1,
- SCTP_CID_INIT_ACK = 2,
- SCTP_CID_SACK = 3,
- SCTP_CID_HEARTBEAT = 4,
- SCTP_CID_HEARTBEAT_ACK = 5,
- SCTP_CID_ABORT = 6,
- SCTP_CID_SHUTDOWN = 7,
- SCTP_CID_SHUTDOWN_ACK = 8,
- SCTP_CID_ERROR = 9,
- SCTP_CID_COOKIE_ECHO = 10,
- SCTP_CID_COOKIE_ACK = 11,
- SCTP_CID_ECN_ECNE = 12,
- SCTP_CID_ECN_CWR = 13,
- SCTP_CID_SHUTDOWN_COMPLETE = 14,
-
- /* AUTH Extension Section 4.1 */
- SCTP_CID_AUTH = 0x0F,
-
- /* PR-SCTP Sec 3.2 */
- SCTP_CID_FWD_TSN = 0xC0,
-
- /* Use hex, as defined in ADDIP sec. 3.1 */
- SCTP_CID_ASCONF = 0xC1,
- SCTP_CID_ASCONF_ACK = 0x80,
-} sctp_cid_t; /* enum */
-
-
-/* Section 3.2
- * Chunk Types are encoded such that the highest-order two bits specify
- * the action that must be taken if the processing endpoint does not
- * recognize the Chunk Type.
- */
-typedef enum {
- SCTP_CID_ACTION_DISCARD = 0x00,
- SCTP_CID_ACTION_DISCARD_ERR = 0x40,
- SCTP_CID_ACTION_SKIP = 0x80,
- SCTP_CID_ACTION_SKIP_ERR = 0xc0,
-} sctp_cid_action_t;
-
-enum { SCTP_CID_ACTION_MASK = 0xc0, };
-
-/* This flag is used in Chunk Flags for ABORT and SHUTDOWN COMPLETE.
- *
- * 3.3.7 Abort Association (ABORT) (6):
- * The T bit is set to 0 if the sender had a TCB that it destroyed.
- * If the sender did not have a TCB it should set this bit to 1.
- */
-enum { SCTP_CHUNK_FLAG_T = 0x01 };
-
-/*
- * Set the T bit
- *
- * 0 1 2 3
- * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * | Type = 14 |Reserved |T| Length = 4 |
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- *
- * Chunk Flags: 8 bits
- *
- * Reserved: 7 bits
- * Set to 0 on transmit and ignored on receipt.
- *
- * T bit: 1 bit
- * The T bit is set to 0 if the sender had a TCB that it destroyed. If
- * the sender did NOT have a TCB it should set this bit to 1.
- *
- * Note: Special rules apply to this chunk for verification, please
- * see Section 8.5.1 for details.
- */
-
-#define sctp_test_T_bit(c) ((c)->chunk_hdr->flags & SCTP_CHUNK_FLAG_T)
-
-/* RFC 2960
- * Section 3.2.1 Optional/Variable-length Parmaeter Format.
- */
-
-typedef struct sctp_paramhdr {
- __be16 type;
- __be16 length;
-} __packed sctp_paramhdr_t;
-
-typedef enum {
-
- /* RFC 2960 Section 3.3.5 */
- SCTP_PARAM_HEARTBEAT_INFO = cpu_to_be16(1),
- /* RFC 2960 Section 3.3.2.1 */
- SCTP_PARAM_IPV4_ADDRESS = cpu_to_be16(5),
- SCTP_PARAM_IPV6_ADDRESS = cpu_to_be16(6),
- SCTP_PARAM_STATE_COOKIE = cpu_to_be16(7),
- SCTP_PARAM_UNRECOGNIZED_PARAMETERS = cpu_to_be16(8),
- SCTP_PARAM_COOKIE_PRESERVATIVE = cpu_to_be16(9),
- SCTP_PARAM_HOST_NAME_ADDRESS = cpu_to_be16(11),
- SCTP_PARAM_SUPPORTED_ADDRESS_TYPES = cpu_to_be16(12),
- SCTP_PARAM_ECN_CAPABLE = cpu_to_be16(0x8000),
-
- /* AUTH Extension Section 3 */
- SCTP_PARAM_RANDOM = cpu_to_be16(0x8002),
- SCTP_PARAM_CHUNKS = cpu_to_be16(0x8003),
- SCTP_PARAM_HMAC_ALGO = cpu_to_be16(0x8004),
-
- /* Add-IP: Supported Extensions, Section 4.2 */
- SCTP_PARAM_SUPPORTED_EXT = cpu_to_be16(0x8008),
-
- /* PR-SCTP Sec 3.1 */
- SCTP_PARAM_FWD_TSN_SUPPORT = cpu_to_be16(0xc000),
-
- /* Add-IP Extension. Section 3.2 */
- SCTP_PARAM_ADD_IP = cpu_to_be16(0xc001),
- SCTP_PARAM_DEL_IP = cpu_to_be16(0xc002),
- SCTP_PARAM_ERR_CAUSE = cpu_to_be16(0xc003),
- SCTP_PARAM_SET_PRIMARY = cpu_to_be16(0xc004),
- SCTP_PARAM_SUCCESS_REPORT = cpu_to_be16(0xc005),
- SCTP_PARAM_ADAPTATION_LAYER_IND = cpu_to_be16(0xc006),
-
-} sctp_param_t; /* enum */
-
-
-/* RFC 2960 Section 3.2.1
- * The Parameter Types are encoded such that the highest-order two bits
- * specify the action that must be taken if the processing endpoint does
- * not recognize the Parameter Type.
- *
- */
-typedef enum {
- SCTP_PARAM_ACTION_DISCARD = cpu_to_be16(0x0000),
- SCTP_PARAM_ACTION_DISCARD_ERR = cpu_to_be16(0x4000),
- SCTP_PARAM_ACTION_SKIP = cpu_to_be16(0x8000),
- SCTP_PARAM_ACTION_SKIP_ERR = cpu_to_be16(0xc000),
-} sctp_param_action_t;
-
-enum { SCTP_PARAM_ACTION_MASK = cpu_to_be16(0xc000), };
-
-/* RFC 2960 Section 3.3.1 Payload Data (DATA) (0) */
-
-typedef struct sctp_datahdr {
- __be32 tsn;
- __be16 stream;
- __be16 ssn;
- __be32 ppid;
- __u8 payload[0];
-} __packed sctp_datahdr_t;
-
-typedef struct sctp_data_chunk {
- sctp_chunkhdr_t chunk_hdr;
- sctp_datahdr_t data_hdr;
-} __packed sctp_data_chunk_t;
-
-/* DATA Chuck Specific Flags */
-enum {
- SCTP_DATA_MIDDLE_FRAG = 0x00,
- SCTP_DATA_LAST_FRAG = 0x01,
- SCTP_DATA_FIRST_FRAG = 0x02,
- SCTP_DATA_NOT_FRAG = 0x03,
- SCTP_DATA_UNORDERED = 0x04,
- SCTP_DATA_SACK_IMM = 0x08,
-};
-enum { SCTP_DATA_FRAG_MASK = 0x03, };
-
-
-/* RFC 2960 Section 3.3.2 Initiation (INIT) (1)
- *
- * This chunk is used to initiate a SCTP association between two
- * endpoints.
- */
-typedef struct sctp_inithdr {
- __be32 init_tag;
- __be32 a_rwnd;
- __be16 num_outbound_streams;
- __be16 num_inbound_streams;
- __be32 initial_tsn;
- __u8 params[0];
-} __packed sctp_inithdr_t;
-
-typedef struct sctp_init_chunk {
- sctp_chunkhdr_t chunk_hdr;
- sctp_inithdr_t init_hdr;
-} __packed sctp_init_chunk_t;
-
-
-/* Section 3.3.2.1. IPv4 Address Parameter (5) */
-typedef struct sctp_ipv4addr_param {
- sctp_paramhdr_t param_hdr;
- struct in_addr addr;
-} __packed sctp_ipv4addr_param_t;
-
-/* Section 3.3.2.1. IPv6 Address Parameter (6) */
-typedef struct sctp_ipv6addr_param {
- sctp_paramhdr_t param_hdr;
- struct in6_addr addr;
-} __packed sctp_ipv6addr_param_t;
-
-/* Section 3.3.2.1 Cookie Preservative (9) */
-typedef struct sctp_cookie_preserve_param {
- sctp_paramhdr_t param_hdr;
- __be32 lifespan_increment;
-} __packed sctp_cookie_preserve_param_t;
-
-/* Section 3.3.2.1 Host Name Address (11) */
-typedef struct sctp_hostname_param {
- sctp_paramhdr_t param_hdr;
- uint8_t hostname[0];
-} __packed sctp_hostname_param_t;
-
-/* Section 3.3.2.1 Supported Address Types (12) */
-typedef struct sctp_supported_addrs_param {
- sctp_paramhdr_t param_hdr;
- __be16 types[0];
-} __packed sctp_supported_addrs_param_t;
-
-/* Appendix A. ECN Capable (32768) */
-typedef struct sctp_ecn_capable_param {
- sctp_paramhdr_t param_hdr;
-} __packed sctp_ecn_capable_param_t;
-
-/* ADDIP Section 3.2.6 Adaptation Layer Indication */
-typedef struct sctp_adaptation_ind_param {
- struct sctp_paramhdr param_hdr;
- __be32 adaptation_ind;
-} __packed sctp_adaptation_ind_param_t;
-
-/* ADDIP Section 4.2.7 Supported Extensions Parameter */
-typedef struct sctp_supported_ext_param {
- struct sctp_paramhdr param_hdr;
- __u8 chunks[0];
-} __packed sctp_supported_ext_param_t;
-
-/* AUTH Section 3.1 Random */
-typedef struct sctp_random_param {
- sctp_paramhdr_t param_hdr;
- __u8 random_val[0];
-} __packed sctp_random_param_t;
-
-/* AUTH Section 3.2 Chunk List */
-typedef struct sctp_chunks_param {
- sctp_paramhdr_t param_hdr;
- __u8 chunks[0];
-} __packed sctp_chunks_param_t;
-
-/* AUTH Section 3.3 HMAC Algorithm */
-typedef struct sctp_hmac_algo_param {
- sctp_paramhdr_t param_hdr;
- __be16 hmac_ids[0];
-} __packed sctp_hmac_algo_param_t;
-
-/* RFC 2960. Section 3.3.3 Initiation Acknowledgement (INIT ACK) (2):
- * The INIT ACK chunk is used to acknowledge the initiation of an SCTP
- * association.
- */
-typedef sctp_init_chunk_t sctp_initack_chunk_t;
-
-/* Section 3.3.3.1 State Cookie (7) */
-typedef struct sctp_cookie_param {
- sctp_paramhdr_t p;
- __u8 body[0];
-} __packed sctp_cookie_param_t;
-
-/* Section 3.3.3.1 Unrecognized Parameters (8) */
-typedef struct sctp_unrecognized_param {
- sctp_paramhdr_t param_hdr;
- sctp_paramhdr_t unrecognized;
-} __packed sctp_unrecognized_param_t;
-
-
-
-/*
- * 3.3.4 Selective Acknowledgement (SACK) (3):
- *
- * This chunk is sent to the peer endpoint to acknowledge received DATA
- * chunks and to inform the peer endpoint of gaps in the received
- * subsequences of DATA chunks as represented by their TSNs.
- */
-
-typedef struct sctp_gap_ack_block {
- __be16 start;
- __be16 end;
-} __packed sctp_gap_ack_block_t;
-
-typedef __be32 sctp_dup_tsn_t;
-
-typedef union {
- sctp_gap_ack_block_t gab;
- sctp_dup_tsn_t dup;
-} sctp_sack_variable_t;
-
-typedef struct sctp_sackhdr {
- __be32 cum_tsn_ack;
- __be32 a_rwnd;
- __be16 num_gap_ack_blocks;
- __be16 num_dup_tsns;
- sctp_sack_variable_t variable[0];
-} __packed sctp_sackhdr_t;
-
-typedef struct sctp_sack_chunk {
- sctp_chunkhdr_t chunk_hdr;
- sctp_sackhdr_t sack_hdr;
-} __packed sctp_sack_chunk_t;
-
-
-/* RFC 2960. Section 3.3.5 Heartbeat Request (HEARTBEAT) (4):
- *
- * An endpoint should send this chunk to its peer endpoint to probe the
- * reachability of a particular destination transport address defined in
- * the present association.
- */
-
-typedef struct sctp_heartbeathdr {
- sctp_paramhdr_t info;
-} __packed sctp_heartbeathdr_t;
-
-typedef struct sctp_heartbeat_chunk {
- sctp_chunkhdr_t chunk_hdr;
- sctp_heartbeathdr_t hb_hdr;
-} __packed sctp_heartbeat_chunk_t;
-
-
-/* For the abort and shutdown ACK we must carry the init tag in the
- * common header. Just the common header is all that is needed with a
- * chunk descriptor.
- */
-typedef struct sctp_abort_chunk {
- sctp_chunkhdr_t uh;
-} __packed sctp_abort_chunk_t;
-
-
-/* For the graceful shutdown we must carry the tag (in common header)
- * and the highest consecutive acking value.
- */
-typedef struct sctp_shutdownhdr {
- __be32 cum_tsn_ack;
-} __packed sctp_shutdownhdr_t;
-
-struct sctp_shutdown_chunk_t {
- sctp_chunkhdr_t chunk_hdr;
- sctp_shutdownhdr_t shutdown_hdr;
-} __packed;
-
-/* RFC 2960. Section 3.3.10 Operation Error (ERROR) (9) */
-
-typedef struct sctp_errhdr {
- __be16 cause;
- __be16 length;
- __u8 variable[0];
-} __packed sctp_errhdr_t;
-
-typedef struct sctp_operr_chunk {
- sctp_chunkhdr_t chunk_hdr;
- sctp_errhdr_t err_hdr;
-} __packed sctp_operr_chunk_t;
-
-/* RFC 2960 3.3.10 - Operation Error
- *
- * Cause Code: 16 bits (unsigned integer)
- *
- * Defines the type of error conditions being reported.
- * Cause Code
- * Value Cause Code
- * --------- ----------------
- * 1 Invalid Stream Identifier
- * 2 Missing Mandatory Parameter
- * 3 Stale Cookie Error
- * 4 Out of Resource
- * 5 Unresolvable Address
- * 6 Unrecognized Chunk Type
- * 7 Invalid Mandatory Parameter
- * 8 Unrecognized Parameters
- * 9 No User Data
- * 10 Cookie Received While Shutting Down
- */
-typedef enum {
-
- SCTP_ERROR_NO_ERROR = cpu_to_be16(0x00),
- SCTP_ERROR_INV_STRM = cpu_to_be16(0x01),
- SCTP_ERROR_MISS_PARAM = cpu_to_be16(0x02),
- SCTP_ERROR_STALE_COOKIE = cpu_to_be16(0x03),
- SCTP_ERROR_NO_RESOURCE = cpu_to_be16(0x04),
- SCTP_ERROR_DNS_FAILED = cpu_to_be16(0x05),
- SCTP_ERROR_UNKNOWN_CHUNK = cpu_to_be16(0x06),
- SCTP_ERROR_INV_PARAM = cpu_to_be16(0x07),
- SCTP_ERROR_UNKNOWN_PARAM = cpu_to_be16(0x08),
- SCTP_ERROR_NO_DATA = cpu_to_be16(0x09),
- SCTP_ERROR_COOKIE_IN_SHUTDOWN = cpu_to_be16(0x0a),
-
-
- /* SCTP Implementation Guide:
- * 11 Restart of an association with new addresses
- * 12 User Initiated Abort
- * 13 Protocol Violation
- */
-
- SCTP_ERROR_RESTART = cpu_to_be16(0x0b),
- SCTP_ERROR_USER_ABORT = cpu_to_be16(0x0c),
- SCTP_ERROR_PROTO_VIOLATION = cpu_to_be16(0x0d),
-
- /* ADDIP Section 3.3 New Error Causes
- *
- * Four new Error Causes are added to the SCTP Operational Errors,
- * primarily for use in the ASCONF-ACK chunk.
- *
- * Value Cause Code
- * --------- ----------------
- * 0x00A0 Request to Delete Last Remaining IP Address.
- * 0x00A1 Operation Refused Due to Resource Shortage.
- * 0x00A2 Request to Delete Source IP Address.
- * 0x00A3 Association Aborted due to illegal ASCONF-ACK
- * 0x00A4 Request refused - no authorization.
- */
- SCTP_ERROR_DEL_LAST_IP = cpu_to_be16(0x00A0),
- SCTP_ERROR_RSRC_LOW = cpu_to_be16(0x00A1),
- SCTP_ERROR_DEL_SRC_IP = cpu_to_be16(0x00A2),
- SCTP_ERROR_ASCONF_ACK = cpu_to_be16(0x00A3),
- SCTP_ERROR_REQ_REFUSED = cpu_to_be16(0x00A4),
-
- /* AUTH Section 4. New Error Cause
- *
- * This section defines a new error cause that will be sent if an AUTH
- * chunk is received with an unsupported HMAC identifier.
- * illustrates the new error cause.
- *
- * Cause Code Error Cause Name
- * --------------------------------------------------------------
- * 0x0105 Unsupported HMAC Identifier
- */
- SCTP_ERROR_UNSUP_HMAC = cpu_to_be16(0x0105)
-} sctp_error_t;
-
-
-
-/* RFC 2960. Appendix A. Explicit Congestion Notification.
- * Explicit Congestion Notification Echo (ECNE) (12)
- */
-typedef struct sctp_ecnehdr {
- __be32 lowest_tsn;
-} sctp_ecnehdr_t;
-
-typedef struct sctp_ecne_chunk {
- sctp_chunkhdr_t chunk_hdr;
- sctp_ecnehdr_t ence_hdr;
-} __packed sctp_ecne_chunk_t;
-
-/* RFC 2960. Appendix A. Explicit Congestion Notification.
- * Congestion Window Reduced (CWR) (13)
- */
-typedef struct sctp_cwrhdr {
- __be32 lowest_tsn;
-} sctp_cwrhdr_t;
-
-typedef struct sctp_cwr_chunk {
- sctp_chunkhdr_t chunk_hdr;
- sctp_cwrhdr_t cwr_hdr;
-} __packed sctp_cwr_chunk_t;
-
-/* PR-SCTP
- * 3.2 Forward Cumulative TSN Chunk Definition (FORWARD TSN)
- *
- * Forward Cumulative TSN chunk has the following format:
- *
- * 0 1 2 3
- * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * | Type = 192 | Flags = 0x00 | Length = Variable |
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * | New Cumulative TSN |
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * | Stream-1 | Stream Sequence-1 |
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * \ /
- * / \
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * | Stream-N | Stream Sequence-N |
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- *
- * Chunk Flags:
- *
- * Set to all zeros on transmit and ignored on receipt.
- *
- * New Cumulative TSN: 32 bit u_int
- *
- * This indicates the new cumulative TSN to the data receiver. Upon
- * the reception of this value, the data receiver MUST consider
- * any missing TSNs earlier than or equal to this value as received
- * and stop reporting them as gaps in any subsequent SACKs.
- *
- * Stream-N: 16 bit u_int
- *
- * This field holds a stream number that was skipped by this
- * FWD-TSN.
- *
- * Stream Sequence-N: 16 bit u_int
- * This field holds the sequence number associated with the stream
- * that was skipped. The stream sequence field holds the largest stream
- * sequence number in this stream being skipped. The receiver of
- * the FWD-TSN's can use the Stream-N and Stream Sequence-N fields
- * to enable delivery of any stranded TSN's that remain on the stream
- * re-ordering queues. This field MUST NOT report TSN's corresponding
- * to DATA chunk that are marked as unordered. For ordered DATA
- * chunks this field MUST be filled in.
- */
-struct sctp_fwdtsn_skip {
- __be16 stream;
- __be16 ssn;
-} __packed;
-
-struct sctp_fwdtsn_hdr {
- __be32 new_cum_tsn;
- struct sctp_fwdtsn_skip skip[0];
-} __packed;
-
-struct sctp_fwdtsn_chunk {
- struct sctp_chunkhdr chunk_hdr;
- struct sctp_fwdtsn_hdr fwdtsn_hdr;
-} __packed;
-
-
-/* ADDIP
- * Section 3.1.1 Address Configuration Change Chunk (ASCONF)
- *
- * Serial Number: 32 bits (unsigned integer)
- * This value represents a Serial Number for the ASCONF Chunk. The
- * valid range of Serial Number is from 0 to 2^32-1.
- * Serial Numbers wrap back to 0 after reaching 2^32 -1.
- *
- * Address Parameter: 8 or 20 bytes (depending on type)
- * The address is an address of the sender of the ASCONF chunk,
- * the address MUST be considered part of the association by the
- * peer endpoint. This field may be used by the receiver of the
- * ASCONF to help in finding the association. This parameter MUST
- * be present in every ASCONF message i.e. it is a mandatory TLV
- * parameter.
- *
- * ASCONF Parameter: TLV format
- * Each Address configuration change is represented by a TLV
- * parameter as defined in Section 3.2. One or more requests may
- * be present in an ASCONF Chunk.
- *
- * Section 3.1.2 Address Configuration Acknowledgement Chunk (ASCONF-ACK)
- *
- * Serial Number: 32 bits (unsigned integer)
- * This value represents the Serial Number for the received ASCONF
- * Chunk that is acknowledged by this chunk. This value is copied
- * from the received ASCONF Chunk.
- *
- * ASCONF Parameter Response: TLV format
- * The ASCONF Parameter Response is used in the ASCONF-ACK to
- * report status of ASCONF processing.
- */
-typedef struct sctp_addip_param {
- sctp_paramhdr_t param_hdr;
- __be32 crr_id;
-} __packed sctp_addip_param_t;
-
-typedef struct sctp_addiphdr {
- __be32 serial;
- __u8 params[0];
-} __packed sctp_addiphdr_t;
-
-typedef struct sctp_addip_chunk {
- sctp_chunkhdr_t chunk_hdr;
- sctp_addiphdr_t addip_hdr;
-} __packed sctp_addip_chunk_t;
-
-/* AUTH
- * Section 4.1 Authentication Chunk (AUTH)
- *
- * This chunk is used to hold the result of the HMAC calculation.
- *
- * 0 1 2 3
- * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * | Type = 0x0F | Flags=0 | Length |
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * | Shared Key Identifier | HMAC Identifier |
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * | |
- * \ HMAC /
- * / \
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- *
- * Type: 1 byte (unsigned integer)
- * This value MUST be set to 0x0F for all AUTH-chunks.
- *
- * Flags: 1 byte (unsigned integer)
- * Set to zero on transmit and ignored on receipt.
- *
- * Length: 2 bytes (unsigned integer)
- * This value holds the length of the HMAC in bytes plus 8.
- *
- * Shared Key Identifier: 2 bytes (unsigned integer)
- * This value describes which endpoint pair shared key is used.
- *
- * HMAC Identifier: 2 bytes (unsigned integer)
- * This value describes which message digest is being used. Table 2
- * shows the currently defined values.
- *
- * The following Table 2 shows the currently defined values for HMAC
- * identifiers.
- *
- * +-----------------+--------------------------+
- * | HMAC Identifier | Message Digest Algorithm |
- * +-----------------+--------------------------+
- * | 0 | Reserved |
- * | 1 | SHA-1 defined in [8] |
- * | 2 | Reserved |
- * | 3 | SHA-256 defined in [8] |
- * +-----------------+--------------------------+
- *
- *
- * HMAC: n bytes (unsigned integer) This hold the result of the HMAC
- * calculation.
- */
-typedef struct sctp_authhdr {
- __be16 shkey_id;
- __be16 hmac_id;
- __u8 hmac[0];
-} __packed sctp_authhdr_t;
-
-typedef struct sctp_auth_chunk {
- sctp_chunkhdr_t chunk_hdr;
- sctp_authhdr_t auth_hdr;
-} __packed sctp_auth_chunk_t;
-
-#endif /* __LINUX_SCTP_H__ */
generated by cgit (git 2.34.1) at 2025-01-11 17:44:46 +0000