711 строки
23 KiB
C
711 строки
23 KiB
C
/* SCTP kernel reference Implementation
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* (C) Copyright IBM Corp. 2001, 2004
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* Copyright (c) 1999-2000 Cisco, Inc.
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* Copyright (c) 1999-2001 Motorola, Inc.
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* Copyright (c) 2001 Intel Corp.
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* Copyright (c) 2001 Nokia, Inc.
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* Copyright (c) 2001 La Monte H.P. Yarroll
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*
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* This file is part of the SCTP kernel reference Implementation
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*
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* Various protocol defined structures.
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*
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* This SCTP implementation is free software;
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* you can redistribute it and/or modify it under the terms of
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* the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This SCTP implementation is distributed in the hope that it
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* will be useful, but WITHOUT ANY WARRANTY; without even the implied
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* ************************
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* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU CC; see the file COPYING. If not, write to
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* the Free Software Foundation, 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*
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* Please send any bug reports or fixes you make to the
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* email address(es):
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* lksctp developers <lksctp-developerst@lists.sourceforge.net>
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*
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* Or submit a bug report through the following website:
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* http://www.sf.net/projects/lksctp
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*
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* Written or modified by:
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* La Monte H.P. Yarroll <piggy@acm.org>
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* Karl Knutson <karl@athena.chicago.il.us>
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* Jon Grimm <jgrimm@us.ibm.com>
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* Xingang Guo <xingang.guo@intel.com>
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* randall@sctp.chicago.il.us
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* kmorneau@cisco.com
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* qxie1@email.mot.com
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* Sridhar Samudrala <sri@us.ibm.com>
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* Kevin Gao <kevin.gao@intel.com>
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*
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* Any bugs reported given to us we will try to fix... any fixes shared will
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* be incorporated into the next SCTP release.
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*/
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#ifndef __LINUX_SCTP_H__
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#define __LINUX_SCTP_H__
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#include <linux/in.h> /* We need in_addr. */
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#include <linux/in6.h> /* We need in6_addr. */
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/* Section 3.1. SCTP Common Header Format */
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typedef struct sctphdr {
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__be16 source;
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__be16 dest;
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__be32 vtag;
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__le32 checksum;
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} __attribute__((packed)) sctp_sctphdr_t;
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#ifdef __KERNEL__
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#include <linux/skbuff.h>
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static inline struct sctphdr *sctp_hdr(const struct sk_buff *skb)
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{
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return (struct sctphdr *)skb_transport_header(skb);
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}
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#endif
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/* Section 3.2. Chunk Field Descriptions. */
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typedef struct sctp_chunkhdr {
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__u8 type;
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__u8 flags;
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__be16 length;
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} __attribute__((packed)) sctp_chunkhdr_t;
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/* Section 3.2. Chunk Type Values.
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* [Chunk Type] identifies the type of information contained in the Chunk
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* Value field. It takes a value from 0 to 254. The value of 255 is
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* reserved for future use as an extension field.
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*/
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typedef enum {
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SCTP_CID_DATA = 0,
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SCTP_CID_INIT = 1,
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SCTP_CID_INIT_ACK = 2,
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SCTP_CID_SACK = 3,
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SCTP_CID_HEARTBEAT = 4,
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SCTP_CID_HEARTBEAT_ACK = 5,
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SCTP_CID_ABORT = 6,
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SCTP_CID_SHUTDOWN = 7,
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SCTP_CID_SHUTDOWN_ACK = 8,
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SCTP_CID_ERROR = 9,
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SCTP_CID_COOKIE_ECHO = 10,
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SCTP_CID_COOKIE_ACK = 11,
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SCTP_CID_ECN_ECNE = 12,
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SCTP_CID_ECN_CWR = 13,
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SCTP_CID_SHUTDOWN_COMPLETE = 14,
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/* AUTH Extension Section 4.1 */
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SCTP_CID_AUTH = 0x0F,
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/* PR-SCTP Sec 3.2 */
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SCTP_CID_FWD_TSN = 0xC0,
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/* Use hex, as defined in ADDIP sec. 3.1 */
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SCTP_CID_ASCONF = 0xC1,
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SCTP_CID_ASCONF_ACK = 0x80,
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} sctp_cid_t; /* enum */
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/* Section 3.2
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* Chunk Types are encoded such that the highest-order two bits specify
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* the action that must be taken if the processing endpoint does not
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* recognize the Chunk Type.
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*/
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typedef enum {
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SCTP_CID_ACTION_DISCARD = 0x00,
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SCTP_CID_ACTION_DISCARD_ERR = 0x40,
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SCTP_CID_ACTION_SKIP = 0x80,
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SCTP_CID_ACTION_SKIP_ERR = 0xc0,
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} sctp_cid_action_t;
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enum { SCTP_CID_ACTION_MASK = 0xc0, };
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/* This flag is used in Chunk Flags for ABORT and SHUTDOWN COMPLETE.
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*
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* 3.3.7 Abort Association (ABORT) (6):
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* The T bit is set to 0 if the sender had a TCB that it destroyed.
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* If the sender did not have a TCB it should set this bit to 1.
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*/
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enum { SCTP_CHUNK_FLAG_T = 0x01 };
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/*
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* Set the T bit
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*
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* 0 1 2 3
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* 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
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Type = 14 |Reserved |T| Length = 4 |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*
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* Chunk Flags: 8 bits
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*
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* Reserved: 7 bits
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* Set to 0 on transmit and ignored on receipt.
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*
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* T bit: 1 bit
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* The T bit is set to 0 if the sender had a TCB that it destroyed. If
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* the sender did NOT have a TCB it should set this bit to 1.
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*
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* Note: Special rules apply to this chunk for verification, please
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* see Section 8.5.1 for details.
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*/
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#define sctp_test_T_bit(c) ((c)->chunk_hdr->flags & SCTP_CHUNK_FLAG_T)
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/* RFC 2960
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* Section 3.2.1 Optional/Variable-length Parmaeter Format.
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*/
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typedef struct sctp_paramhdr {
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__be16 type;
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__be16 length;
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} __attribute__((packed)) sctp_paramhdr_t;
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typedef enum {
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/* RFC 2960 Section 3.3.5 */
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SCTP_PARAM_HEARTBEAT_INFO = cpu_to_be16(1),
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/* RFC 2960 Section 3.3.2.1 */
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SCTP_PARAM_IPV4_ADDRESS = cpu_to_be16(5),
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SCTP_PARAM_IPV6_ADDRESS = cpu_to_be16(6),
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SCTP_PARAM_STATE_COOKIE = cpu_to_be16(7),
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SCTP_PARAM_UNRECOGNIZED_PARAMETERS = cpu_to_be16(8),
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SCTP_PARAM_COOKIE_PRESERVATIVE = cpu_to_be16(9),
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SCTP_PARAM_HOST_NAME_ADDRESS = cpu_to_be16(11),
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SCTP_PARAM_SUPPORTED_ADDRESS_TYPES = cpu_to_be16(12),
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SCTP_PARAM_ECN_CAPABLE = cpu_to_be16(0x8000),
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/* AUTH Extension Section 3 */
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SCTP_PARAM_RANDOM = cpu_to_be16(0x8002),
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SCTP_PARAM_CHUNKS = cpu_to_be16(0x8003),
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SCTP_PARAM_HMAC_ALGO = cpu_to_be16(0x8004),
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/* Add-IP: Supported Extensions, Section 4.2 */
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SCTP_PARAM_SUPPORTED_EXT = cpu_to_be16(0x8008),
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/* PR-SCTP Sec 3.1 */
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SCTP_PARAM_FWD_TSN_SUPPORT = cpu_to_be16(0xc000),
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/* Add-IP Extension. Section 3.2 */
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SCTP_PARAM_ADD_IP = cpu_to_be16(0xc001),
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SCTP_PARAM_DEL_IP = cpu_to_be16(0xc002),
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SCTP_PARAM_ERR_CAUSE = cpu_to_be16(0xc003),
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SCTP_PARAM_SET_PRIMARY = cpu_to_be16(0xc004),
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SCTP_PARAM_SUCCESS_REPORT = cpu_to_be16(0xc005),
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SCTP_PARAM_ADAPTATION_LAYER_IND = cpu_to_be16(0xc006),
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} sctp_param_t; /* enum */
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/* RFC 2960 Section 3.2.1
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* The Parameter Types are encoded such that the highest-order two bits
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* specify the action that must be taken if the processing endpoint does
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* not recognize the Parameter Type.
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*
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*/
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typedef enum {
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SCTP_PARAM_ACTION_DISCARD = cpu_to_be16(0x0000),
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SCTP_PARAM_ACTION_DISCARD_ERR = cpu_to_be16(0x4000),
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SCTP_PARAM_ACTION_SKIP = cpu_to_be16(0x8000),
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SCTP_PARAM_ACTION_SKIP_ERR = cpu_to_be16(0xc000),
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} sctp_param_action_t;
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enum { SCTP_PARAM_ACTION_MASK = cpu_to_be16(0xc000), };
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/* RFC 2960 Section 3.3.1 Payload Data (DATA) (0) */
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typedef struct sctp_datahdr {
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__be32 tsn;
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__be16 stream;
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__be16 ssn;
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__be32 ppid;
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__u8 payload[0];
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} __attribute__((packed)) sctp_datahdr_t;
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typedef struct sctp_data_chunk {
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sctp_chunkhdr_t chunk_hdr;
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sctp_datahdr_t data_hdr;
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} __attribute__((packed)) sctp_data_chunk_t;
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/* DATA Chuck Specific Flags */
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enum {
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SCTP_DATA_MIDDLE_FRAG = 0x00,
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SCTP_DATA_LAST_FRAG = 0x01,
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SCTP_DATA_FIRST_FRAG = 0x02,
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SCTP_DATA_NOT_FRAG = 0x03,
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SCTP_DATA_UNORDERED = 0x04,
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};
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enum { SCTP_DATA_FRAG_MASK = 0x03, };
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/* RFC 2960 Section 3.3.2 Initiation (INIT) (1)
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*
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* This chunk is used to initiate a SCTP association between two
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* endpoints.
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*/
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typedef struct sctp_inithdr {
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__be32 init_tag;
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__be32 a_rwnd;
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__be16 num_outbound_streams;
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__be16 num_inbound_streams;
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__be32 initial_tsn;
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__u8 params[0];
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} __attribute__((packed)) sctp_inithdr_t;
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typedef struct sctp_init_chunk {
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sctp_chunkhdr_t chunk_hdr;
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sctp_inithdr_t init_hdr;
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} __attribute__((packed)) sctp_init_chunk_t;
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/* Section 3.3.2.1. IPv4 Address Parameter (5) */
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typedef struct sctp_ipv4addr_param {
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sctp_paramhdr_t param_hdr;
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struct in_addr addr;
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} __attribute__((packed)) sctp_ipv4addr_param_t;
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/* Section 3.3.2.1. IPv6 Address Parameter (6) */
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typedef struct sctp_ipv6addr_param {
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sctp_paramhdr_t param_hdr;
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struct in6_addr addr;
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} __attribute__((packed)) sctp_ipv6addr_param_t;
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/* Section 3.3.2.1 Cookie Preservative (9) */
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typedef struct sctp_cookie_preserve_param {
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sctp_paramhdr_t param_hdr;
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__be32 lifespan_increment;
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} __attribute__((packed)) sctp_cookie_preserve_param_t;
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/* Section 3.3.2.1 Host Name Address (11) */
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typedef struct sctp_hostname_param {
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sctp_paramhdr_t param_hdr;
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uint8_t hostname[0];
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} __attribute__((packed)) sctp_hostname_param_t;
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/* Section 3.3.2.1 Supported Address Types (12) */
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typedef struct sctp_supported_addrs_param {
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sctp_paramhdr_t param_hdr;
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__be16 types[0];
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} __attribute__((packed)) sctp_supported_addrs_param_t;
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/* Appendix A. ECN Capable (32768) */
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typedef struct sctp_ecn_capable_param {
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sctp_paramhdr_t param_hdr;
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} __attribute__((packed)) sctp_ecn_capable_param_t;
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/* ADDIP Section 3.2.6 Adaptation Layer Indication */
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typedef struct sctp_adaptation_ind_param {
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struct sctp_paramhdr param_hdr;
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__be32 adaptation_ind;
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} __attribute__((packed)) sctp_adaptation_ind_param_t;
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/* ADDIP Section 4.2.7 Supported Extensions Parameter */
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typedef struct sctp_supported_ext_param {
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struct sctp_paramhdr param_hdr;
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__u8 chunks[0];
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} __attribute__((packed)) sctp_supported_ext_param_t;
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/* AUTH Section 3.1 Random */
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typedef struct sctp_random_param {
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sctp_paramhdr_t param_hdr;
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__u8 random_val[0];
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} __attribute__((packed)) sctp_random_param_t;
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/* AUTH Section 3.2 Chunk List */
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typedef struct sctp_chunks_param {
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sctp_paramhdr_t param_hdr;
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__u8 chunks[0];
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} __attribute__((packed)) sctp_chunks_param_t;
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/* AUTH Section 3.3 HMAC Algorithm */
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typedef struct sctp_hmac_algo_param {
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sctp_paramhdr_t param_hdr;
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__be16 hmac_ids[0];
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} __attribute__((packed)) sctp_hmac_algo_param_t;
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/* RFC 2960. Section 3.3.3 Initiation Acknowledgement (INIT ACK) (2):
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* The INIT ACK chunk is used to acknowledge the initiation of an SCTP
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* association.
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*/
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typedef sctp_init_chunk_t sctp_initack_chunk_t;
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/* Section 3.3.3.1 State Cookie (7) */
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typedef struct sctp_cookie_param {
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sctp_paramhdr_t p;
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__u8 body[0];
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} __attribute__((packed)) sctp_cookie_param_t;
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/* Section 3.3.3.1 Unrecognized Parameters (8) */
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typedef struct sctp_unrecognized_param {
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sctp_paramhdr_t param_hdr;
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sctp_paramhdr_t unrecognized;
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} __attribute__((packed)) sctp_unrecognized_param_t;
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/*
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* 3.3.4 Selective Acknowledgement (SACK) (3):
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*
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* This chunk is sent to the peer endpoint to acknowledge received DATA
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* chunks and to inform the peer endpoint of gaps in the received
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* subsequences of DATA chunks as represented by their TSNs.
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*/
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typedef struct sctp_gap_ack_block {
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__be16 start;
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__be16 end;
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} __attribute__((packed)) sctp_gap_ack_block_t;
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typedef __be32 sctp_dup_tsn_t;
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typedef union {
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sctp_gap_ack_block_t gab;
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sctp_dup_tsn_t dup;
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} sctp_sack_variable_t;
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typedef struct sctp_sackhdr {
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__be32 cum_tsn_ack;
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__be32 a_rwnd;
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__be16 num_gap_ack_blocks;
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__be16 num_dup_tsns;
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sctp_sack_variable_t variable[0];
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} __attribute__((packed)) sctp_sackhdr_t;
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typedef struct sctp_sack_chunk {
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sctp_chunkhdr_t chunk_hdr;
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sctp_sackhdr_t sack_hdr;
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} __attribute__((packed)) sctp_sack_chunk_t;
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/* RFC 2960. Section 3.3.5 Heartbeat Request (HEARTBEAT) (4):
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*
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* An endpoint should send this chunk to its peer endpoint to probe the
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* reachability of a particular destination transport address defined in
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* the present association.
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*/
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typedef struct sctp_heartbeathdr {
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sctp_paramhdr_t info;
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} __attribute__((packed)) sctp_heartbeathdr_t;
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typedef struct sctp_heartbeat_chunk {
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sctp_chunkhdr_t chunk_hdr;
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sctp_heartbeathdr_t hb_hdr;
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} __attribute__((packed)) sctp_heartbeat_chunk_t;
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/* For the abort and shutdown ACK we must carry the init tag in the
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* common header. Just the common header is all that is needed with a
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* chunk descriptor.
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*/
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typedef struct sctp_abort_chunk {
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sctp_chunkhdr_t uh;
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} __attribute__((packed)) sctp_abort_chunk_t;
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/* For the graceful shutdown we must carry the tag (in common header)
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* and the highest consecutive acking value.
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*/
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typedef struct sctp_shutdownhdr {
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__be32 cum_tsn_ack;
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} __attribute__((packed)) sctp_shutdownhdr_t;
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struct sctp_shutdown_chunk_t {
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sctp_chunkhdr_t chunk_hdr;
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sctp_shutdownhdr_t shutdown_hdr;
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} __attribute__ ((packed));
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/* RFC 2960. Section 3.3.10 Operation Error (ERROR) (9) */
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typedef struct sctp_errhdr {
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__be16 cause;
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__be16 length;
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__u8 variable[0];
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} __attribute__((packed)) sctp_errhdr_t;
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typedef struct sctp_operr_chunk {
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sctp_chunkhdr_t chunk_hdr;
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sctp_errhdr_t err_hdr;
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} __attribute__((packed)) sctp_operr_chunk_t;
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/* RFC 2960 3.3.10 - Operation Error
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*
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* Cause Code: 16 bits (unsigned integer)
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*
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* Defines the type of error conditions being reported.
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* Cause Code
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* Value Cause Code
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* --------- ----------------
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* 1 Invalid Stream Identifier
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* 2 Missing Mandatory Parameter
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* 3 Stale Cookie Error
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* 4 Out of Resource
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* 5 Unresolvable Address
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* 6 Unrecognized Chunk Type
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* 7 Invalid Mandatory Parameter
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* 8 Unrecognized Parameters
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* 9 No User Data
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* 10 Cookie Received While Shutting Down
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*/
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typedef enum {
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SCTP_ERROR_NO_ERROR = cpu_to_be16(0x00),
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SCTP_ERROR_INV_STRM = cpu_to_be16(0x01),
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SCTP_ERROR_MISS_PARAM = cpu_to_be16(0x02),
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SCTP_ERROR_STALE_COOKIE = cpu_to_be16(0x03),
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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
|
|
* --------- ----------------
|
|
* 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 = cpu_to_be16(0x0100),
|
|
SCTP_ERROR_RSRC_LOW = cpu_to_be16(0x0101),
|
|
SCTP_ERROR_DEL_SRC_IP = cpu_to_be16(0x0102),
|
|
SCTP_ERROR_ASCONF_ACK = cpu_to_be16(0x0103),
|
|
SCTP_ERROR_REQ_REFUSED = cpu_to_be16(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 = 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;
|
|
} __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__ */
|