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linux-next/include/linux/sctp.h
Vlad Yasevich 60c778b259 [SCTP]: Stop claiming that this is a "reference implementation" 
I was notified by Randy Stewart that lksctp claims to be
"the reference implementation".  First of all, "the
refrence implementation" was the original implementation
of SCTP in usersapce written ty Randy and a few others.
Second, after looking at the definiton of 'reference implementation',
we don't really meet the requirements.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
2008-02-05 10:59:07 -05:00

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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;
__be32 checksum;
} __attribute__((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;
} __attribute__((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;
} __attribute__((packed)) sctp_paramhdr_t;
typedef enum {
/* RFC 2960 Section 3.3.5 */
SCTP_PARAM_HEARTBEAT_INFO = __constant_htons(1),
/* RFC 2960 Section 3.3.2.1 */
SCTP_PARAM_IPV4_ADDRESS = __constant_htons(5),
SCTP_PARAM_IPV6_ADDRESS = __constant_htons(6),
SCTP_PARAM_STATE_COOKIE = __constant_htons(7),
SCTP_PARAM_UNRECOGNIZED_PARAMETERS = __constant_htons(8),
SCTP_PARAM_COOKIE_PRESERVATIVE = __constant_htons(9),
SCTP_PARAM_HOST_NAME_ADDRESS = __constant_htons(11),
SCTP_PARAM_SUPPORTED_ADDRESS_TYPES = __constant_htons(12),
SCTP_PARAM_ECN_CAPABLE = __constant_htons(0x8000),
/* AUTH Extension Section 3 */
SCTP_PARAM_RANDOM = __constant_htons(0x8002),
SCTP_PARAM_CHUNKS = __constant_htons(0x8003),
SCTP_PARAM_HMAC_ALGO = __constant_htons(0x8004),
/* Add-IP: Supported Extensions, Section 4.2 */
SCTP_PARAM_SUPPORTED_EXT = __constant_htons(0x8008),
/* PR-SCTP Sec 3.1 */
SCTP_PARAM_FWD_TSN_SUPPORT = __constant_htons(0xc000),
/* Add-IP Extension. Section 3.2 */
SCTP_PARAM_ADD_IP = __constant_htons(0xc001),
SCTP_PARAM_DEL_IP = __constant_htons(0xc002),
SCTP_PARAM_ERR_CAUSE = __constant_htons(0xc003),
SCTP_PARAM_SET_PRIMARY = __constant_htons(0xc004),
SCTP_PARAM_SUCCESS_REPORT = __constant_htons(0xc005),
SCTP_PARAM_ADAPTATION_LAYER_IND = __constant_htons(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 = __constant_htons(0x0000),
SCTP_PARAM_ACTION_DISCARD_ERR = __constant_htons(0x4000),
SCTP_PARAM_ACTION_SKIP = __constant_htons(0x8000),
SCTP_PARAM_ACTION_SKIP_ERR = __constant_htons(0xc000),
} sctp_param_action_t;
enum { SCTP_PARAM_ACTION_MASK = __constant_htons(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];
} __attribute__((packed)) sctp_datahdr_t;
typedef struct sctp_data_chunk {
sctp_chunkhdr_t chunk_hdr;
sctp_datahdr_t data_hdr;
} __attribute__((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,
};
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];
} __attribute__((packed)) sctp_inithdr_t;
typedef struct sctp_init_chunk {
sctp_chunkhdr_t chunk_hdr;
sctp_inithdr_t init_hdr;
} __attribute__((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;
} __attribute__((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;
} __attribute__((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;
} __attribute__((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];
} __attribute__((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];
} __attribute__((packed)) sctp_supported_addrs_param_t;
/* Appendix A. ECN Capable (32768) */
typedef struct sctp_ecn_capable_param {
sctp_paramhdr_t param_hdr;
} __attribute__((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;
} __attribute__((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];
} __attribute__((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];
} __attribute__((packed)) sctp_random_param_t;
/* AUTH Section 3.2 Chunk List */
typedef struct sctp_chunks_param {
sctp_paramhdr_t param_hdr;
__u8 chunks[0];
} __attribute__((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];
} __attribute__((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];
} __attribute__((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;
} __attribute__((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;
} __attribute__((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];
} __attribute__((packed)) sctp_sackhdr_t;
typedef struct sctp_sack_chunk {
sctp_chunkhdr_t chunk_hdr;
sctp_sackhdr_t sack_hdr;
} __attribute__((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;
} __attribute__((packed)) sctp_heartbeathdr_t;
typedef struct sctp_heartbeat_chunk {
sctp_chunkhdr_t chunk_hdr;
sctp_heartbeathdr_t hb_hdr;
} __attribute__((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;
} __attribute__((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;
} __attribute__((packed)) sctp_shutdownhdr_t;
struct sctp_shutdown_chunk_t {
sctp_chunkhdr_t chunk_hdr;
sctp_shutdownhdr_t shutdown_hdr;
} __attribute__ ((packed));
/* RFC 2960. Section 3.3.10 Operation Error (ERROR) (9) */
typedef struct sctp_errhdr {
__be16 cause;
__be16 length;
__u8 variable[0];
} __attribute__((packed)) sctp_errhdr_t;
typedef struct sctp_operr_chunk {
sctp_chunkhdr_t chunk_hdr;
sctp_errhdr_t err_hdr;
} __attribute__((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 = __constant_htons(0x00),
SCTP_ERROR_INV_STRM = __constant_htons(0x01),
SCTP_ERROR_MISS_PARAM = __constant_htons(0x02),
SCTP_ERROR_STALE_COOKIE = __constant_htons(0x03),
SCTP_ERROR_NO_RESOURCE = __constant_htons(0x04),
SCTP_ERROR_DNS_FAILED = __constant_htons(0x05),
SCTP_ERROR_UNKNOWN_CHUNK = __constant_htons(0x06),
SCTP_ERROR_INV_PARAM = __constant_htons(0x07),
SCTP_ERROR_UNKNOWN_PARAM = __constant_htons(0x08),
SCTP_ERROR_NO_DATA = __constant_htons(0x09),
SCTP_ERROR_COOKIE_IN_SHUTDOWN = __constant_htons(0x0a),
/* SCTP Implementation Guide:
* 11 Restart of an association with new addresses
* 12 User Initiated Abort
* 13 Protocol Violation
*/
SCTP_ERROR_RESTART = __constant_htons(0x0b),
SCTP_ERROR_USER_ABORT = __constant_htons(0x0c),
SCTP_ERROR_PROTO_VIOLATION = __constant_htons(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
* --------- ----------------
* 0x0100 Request to Delete Last Remaining IP Address.
* 0x0101 Operation Refused Due to Resource Shortage.
* 0x0102 Request to Delete Source IP Address.
* 0x0103 Association Aborted due to illegal ASCONF-ACK
* 0x0104 Request refused - no authorization.
*/
SCTP_ERROR_DEL_LAST_IP = __constant_htons(0x0100),
SCTP_ERROR_RSRC_LOW = __constant_htons(0x0101),
SCTP_ERROR_DEL_SRC_IP = __constant_htons(0x0102),
SCTP_ERROR_ASCONF_ACK = __constant_htons(0x0103),
SCTP_ERROR_REQ_REFUSED = __constant_htons(0x0104),
/* 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 = __constant_htons(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;
} __attribute__((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;
} __attribute__((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;
} __attribute__((packed));
struct sctp_fwdtsn_hdr {
__be32 new_cum_tsn;
struct sctp_fwdtsn_skip skip[0];
} __attribute((packed));
struct sctp_fwdtsn_chunk {
struct sctp_chunkhdr chunk_hdr;
struct sctp_fwdtsn_hdr fwdtsn_hdr;
} __attribute((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;
} __attribute__((packed)) sctp_addip_param_t;
typedef struct sctp_addiphdr {
__be32 serial;
__u8 params[0];
} __attribute__((packed)) sctp_addiphdr_t;
typedef struct sctp_addip_chunk {
sctp_chunkhdr_t chunk_hdr;
sctp_addiphdr_t addip_hdr;
} __attribute__((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];
} __attribute__((packed)) sctp_authhdr_t;
typedef struct sctp_auth_chunk {
sctp_chunkhdr_t chunk_hdr;
sctp_authhdr_t auth_hdr;
} __attribute__((packed)) sctp_auth_chunk_t;
#endif /* __LINUX_SCTP_H__ */
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