1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
594 lines
19 KiB
C
594 lines
19 KiB
C
/* 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.
|
|
*
|
|
* The SCTP reference 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.
|
|
*
|
|
* The SCTP reference 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 {
|
|
__u16 source;
|
|
__u16 dest;
|
|
__u32 vtag;
|
|
__u32 checksum;
|
|
} __attribute__((packed)) sctp_sctphdr_t;
|
|
|
|
/* Section 3.2. Chunk Field Descriptions. */
|
|
typedef struct sctp_chunkhdr {
|
|
__u8 type;
|
|
__u8 flags;
|
|
__u16 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,
|
|
|
|
/* 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 {
|
|
__u16 type;
|
|
__u16 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),
|
|
|
|
/* 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_ADAPTION_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 {
|
|
__u32 tsn;
|
|
__u16 stream;
|
|
__u16 ssn;
|
|
__u32 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 {
|
|
__u32 init_tag;
|
|
__u32 a_rwnd;
|
|
__u16 num_outbound_streams;
|
|
__u16 num_inbound_streams;
|
|
__u32 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;
|
|
uint32_t 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;
|
|
uint16_t 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 Adaption Layer Indication */
|
|
typedef struct sctp_adaption_ind_param {
|
|
struct sctp_paramhdr param_hdr;
|
|
__u32 adaption_ind;
|
|
} __attribute__((packed)) sctp_adaption_ind_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 {
|
|
__u16 start;
|
|
__u16 end;
|
|
} __attribute__((packed)) sctp_gap_ack_block_t;
|
|
|
|
typedef uint32_t 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 {
|
|
__u32 cum_tsn_ack;
|
|
__u32 a_rwnd;
|
|
__u16 num_gap_ack_blocks;
|
|
__u16 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 {
|
|
__u32 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 {
|
|
__u16 cause;
|
|
__u16 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)
|
|
} sctp_error_t;
|
|
|
|
|
|
|
|
/* RFC 2960. Appendix A. Explicit Congestion Notification.
|
|
* Explicit Congestion Notification Echo (ECNE) (12)
|
|
*/
|
|
typedef struct sctp_ecnehdr {
|
|
__u32 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 {
|
|
__u32 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 {
|
|
__u16 stream;
|
|
__u16 ssn;
|
|
} __attribute__((packed));
|
|
|
|
struct sctp_fwdtsn_hdr {
|
|
__u32 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;
|
|
__u32 crr_id;
|
|
} __attribute__((packed)) sctp_addip_param_t;
|
|
|
|
typedef struct sctp_addiphdr {
|
|
__u32 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;
|
|
|
|
#endif /* __LINUX_SCTP_H__ */
|