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816 lines
23 KiB
816 lines
23 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/* 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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* Please send any bug reports or fixes you make to the |
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* email address(es): |
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* lksctp developers <[email protected]> |
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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 <[email protected]> |
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* Karl Knutson <[email protected]> |
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* Jon Grimm <[email protected]> |
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* Xingang Guo <[email protected]> |
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* [email protected] |
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* [email protected] |
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* [email protected] |
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* Sridhar Samudrala <[email protected]> |
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* Kevin Gao <[email protected]> |
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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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|
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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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#include <linux/skbuff.h> |
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#include <uapi/linux/sctp.h> |
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|
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/* Section 3.1. SCTP Common Header Format */ |
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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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}; |
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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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/* Section 3.2. Chunk Field Descriptions. */ |
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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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}; |
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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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enum sctp_cid { |
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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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/* sctp ndata 5.1. I-DATA */ |
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SCTP_CID_I_DATA = 0x40, |
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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_I_FWD_TSN = 0xC2, |
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SCTP_CID_ASCONF_ACK = 0x80, |
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SCTP_CID_RECONF = 0x82, |
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}; /* 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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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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}; |
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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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struct sctp_paramhdr { |
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__be16 type; |
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__be16 length; |
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}; |
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enum sctp_param { |
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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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/* RE-CONFIG. Section 4 */ |
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SCTP_PARAM_RESET_OUT_REQUEST = cpu_to_be16(0x000d), |
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SCTP_PARAM_RESET_IN_REQUEST = cpu_to_be16(0x000e), |
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SCTP_PARAM_RESET_TSN_REQUEST = cpu_to_be16(0x000f), |
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SCTP_PARAM_RESET_RESPONSE = cpu_to_be16(0x0010), |
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SCTP_PARAM_RESET_ADD_OUT_STREAMS = cpu_to_be16(0x0011), |
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SCTP_PARAM_RESET_ADD_IN_STREAMS = cpu_to_be16(0x0012), |
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}; /* 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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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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}; |
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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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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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__u32 ppid; |
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__u8 payload[]; |
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}; |
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struct sctp_data_chunk { |
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struct sctp_chunkhdr chunk_hdr; |
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struct sctp_datahdr data_hdr; |
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}; |
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struct sctp_idatahdr { |
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__be32 tsn; |
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__be16 stream; |
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__be16 reserved; |
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__be32 mid; |
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union { |
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__u32 ppid; |
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__be32 fsn; |
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}; |
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__u8 payload[0]; |
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}; |
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struct sctp_idata_chunk { |
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struct sctp_chunkhdr chunk_hdr; |
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struct sctp_idatahdr data_hdr; |
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}; |
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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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SCTP_DATA_SACK_IMM = 0x08, |
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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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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[]; |
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}; |
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struct sctp_init_chunk { |
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struct sctp_chunkhdr chunk_hdr; |
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struct sctp_inithdr init_hdr; |
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}; |
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/* Section 3.3.2.1. IPv4 Address Parameter (5) */ |
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struct sctp_ipv4addr_param { |
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struct sctp_paramhdr param_hdr; |
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struct in_addr addr; |
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}; |
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/* Section 3.3.2.1. IPv6 Address Parameter (6) */ |
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struct sctp_ipv6addr_param { |
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struct sctp_paramhdr param_hdr; |
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struct in6_addr addr; |
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}; |
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/* Section 3.3.2.1 Cookie Preservative (9) */ |
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struct sctp_cookie_preserve_param { |
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struct sctp_paramhdr param_hdr; |
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__be32 lifespan_increment; |
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}; |
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/* Section 3.3.2.1 Host Name Address (11) */ |
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struct sctp_hostname_param { |
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struct sctp_paramhdr param_hdr; |
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uint8_t hostname[]; |
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}; |
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/* Section 3.3.2.1 Supported Address Types (12) */ |
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struct sctp_supported_addrs_param { |
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struct sctp_paramhdr param_hdr; |
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__be16 types[]; |
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}; |
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/* ADDIP Section 3.2.6 Adaptation Layer Indication */ |
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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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}; |
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/* ADDIP Section 4.2.7 Supported Extensions Parameter */ |
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struct sctp_supported_ext_param { |
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struct sctp_paramhdr param_hdr; |
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__u8 chunks[]; |
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}; |
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/* AUTH Section 3.1 Random */ |
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struct sctp_random_param { |
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struct sctp_paramhdr param_hdr; |
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__u8 random_val[]; |
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}; |
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/* AUTH Section 3.2 Chunk List */ |
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struct sctp_chunks_param { |
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struct sctp_paramhdr param_hdr; |
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__u8 chunks[]; |
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}; |
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/* AUTH Section 3.3 HMAC Algorithm */ |
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struct sctp_hmac_algo_param { |
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struct sctp_paramhdr param_hdr; |
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__be16 hmac_ids[]; |
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}; |
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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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struct sctp_initack_chunk { |
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struct sctp_chunkhdr chunk_hdr; |
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struct sctp_inithdr init_hdr; |
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}; |
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/* Section 3.3.3.1 State Cookie (7) */ |
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struct sctp_cookie_param { |
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struct sctp_paramhdr p; |
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__u8 body[]; |
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}; |
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/* Section 3.3.3.1 Unrecognized Parameters (8) */ |
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struct sctp_unrecognized_param { |
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struct sctp_paramhdr param_hdr; |
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struct sctp_paramhdr unrecognized; |
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}; |
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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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struct sctp_gap_ack_block { |
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__be16 start; |
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__be16 end; |
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}; |
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union sctp_sack_variable { |
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struct sctp_gap_ack_block gab; |
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__be32 dup; |
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}; |
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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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union sctp_sack_variable variable[]; |
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}; |
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struct sctp_sack_chunk { |
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struct sctp_chunkhdr chunk_hdr; |
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struct sctp_sackhdr sack_hdr; |
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}; |
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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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struct sctp_heartbeathdr { |
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struct sctp_paramhdr info; |
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}; |
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struct sctp_heartbeat_chunk { |
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struct sctp_chunkhdr chunk_hdr; |
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struct sctp_heartbeathdr hb_hdr; |
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}; |
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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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struct sctp_abort_chunk { |
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struct sctp_chunkhdr uh; |
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}; |
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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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struct sctp_shutdownhdr { |
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__be32 cum_tsn_ack; |
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}; |
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struct sctp_shutdown_chunk { |
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struct sctp_chunkhdr chunk_hdr; |
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struct sctp_shutdownhdr shutdown_hdr; |
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}; |
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/* RFC 2960. Section 3.3.10 Operation Error (ERROR) (9) */ |
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struct sctp_errhdr { |
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__be16 cause; |
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__be16 length; |
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__u8 variable[]; |
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}; |
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struct sctp_operr_chunk { |
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struct sctp_chunkhdr chunk_hdr; |
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struct sctp_errhdr err_hdr; |
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}; |
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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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enum sctp_error { |
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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), |
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SCTP_ERROR_DNS_FAILED = cpu_to_be16(0x05), |
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SCTP_ERROR_UNKNOWN_CHUNK = cpu_to_be16(0x06), |
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SCTP_ERROR_INV_PARAM = cpu_to_be16(0x07), |
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SCTP_ERROR_UNKNOWN_PARAM = cpu_to_be16(0x08), |
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SCTP_ERROR_NO_DATA = cpu_to_be16(0x09), |
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SCTP_ERROR_COOKIE_IN_SHUTDOWN = cpu_to_be16(0x0a), |
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/* SCTP Implementation Guide: |
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* 11 Restart of an association with new addresses |
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* 12 User Initiated Abort |
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* 13 Protocol Violation |
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* 14 Restart of an Association with New Encapsulation Port |
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*/ |
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SCTP_ERROR_RESTART = cpu_to_be16(0x0b), |
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SCTP_ERROR_USER_ABORT = cpu_to_be16(0x0c), |
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SCTP_ERROR_PROTO_VIOLATION = cpu_to_be16(0x0d), |
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SCTP_ERROR_NEW_ENCAP_PORT = cpu_to_be16(0x0e), |
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/* ADDIP Section 3.3 New Error Causes |
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* |
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* Four new Error Causes are added to the SCTP Operational Errors, |
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* primarily for use in the ASCONF-ACK chunk. |
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* |
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* Value Cause Code |
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* --------- ---------------- |
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* 0x00A0 Request to Delete Last Remaining IP Address. |
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* 0x00A1 Operation Refused Due to Resource Shortage. |
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* 0x00A2 Request to Delete Source IP Address. |
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* 0x00A3 Association Aborted due to illegal ASCONF-ACK |
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* 0x00A4 Request refused - no authorization. |
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*/ |
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SCTP_ERROR_DEL_LAST_IP = cpu_to_be16(0x00A0), |
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SCTP_ERROR_RSRC_LOW = cpu_to_be16(0x00A1), |
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SCTP_ERROR_DEL_SRC_IP = cpu_to_be16(0x00A2), |
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SCTP_ERROR_ASCONF_ACK = cpu_to_be16(0x00A3), |
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SCTP_ERROR_REQ_REFUSED = cpu_to_be16(0x00A4), |
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|
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/* AUTH Section 4. New Error Cause |
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* |
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* This section defines a new error cause that will be sent if an AUTH |
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* chunk is received with an unsupported HMAC identifier. |
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* illustrates the new error cause. |
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* |
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* Cause Code Error Cause Name |
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* -------------------------------------------------------------- |
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* 0x0105 Unsupported HMAC Identifier |
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*/ |
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SCTP_ERROR_UNSUP_HMAC = cpu_to_be16(0x0105) |
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}; |
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/* RFC 2960. Appendix A. Explicit Congestion Notification. |
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* Explicit Congestion Notification Echo (ECNE) (12) |
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*/ |
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struct sctp_ecnehdr { |
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__be32 lowest_tsn; |
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}; |
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struct sctp_ecne_chunk { |
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struct sctp_chunkhdr chunk_hdr; |
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struct sctp_ecnehdr ence_hdr; |
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}; |
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|
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/* RFC 2960. Appendix A. Explicit Congestion Notification. |
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* Congestion Window Reduced (CWR) (13) |
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*/ |
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struct sctp_cwrhdr { |
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__be32 lowest_tsn; |
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}; |
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|
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/* PR-SCTP |
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* 3.2 Forward Cumulative TSN Chunk Definition (FORWARD TSN) |
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* |
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* Forward Cumulative TSN chunk has the following format: |
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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 = 192 | Flags = 0x00 | Length = Variable | |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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* | New Cumulative TSN | |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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* | Stream-1 | Stream Sequence-1 | |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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* \ / |
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* / \ |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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* | Stream-N | Stream Sequence-N | |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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* |
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* Chunk Flags: |
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* |
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* Set to all zeros on transmit and ignored on receipt. |
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* |
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* New Cumulative TSN: 32 bit u_int |
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* |
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* This indicates the new cumulative TSN to the data receiver. Upon |
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* the reception of this value, the data receiver MUST consider |
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* any missing TSNs earlier than or equal to this value as received |
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* and stop reporting them as gaps in any subsequent SACKs. |
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* |
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* Stream-N: 16 bit u_int |
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* |
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* This field holds a stream number that was skipped by this |
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* FWD-TSN. |
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* |
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* Stream Sequence-N: 16 bit u_int |
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* This field holds the sequence number associated with the stream |
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* that was skipped. The stream sequence field holds the largest stream |
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* sequence number in this stream being skipped. The receiver of |
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* the FWD-TSN's can use the Stream-N and Stream Sequence-N fields |
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* to enable delivery of any stranded TSN's that remain on the stream |
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* re-ordering queues. This field MUST NOT report TSN's corresponding |
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* to DATA chunk that are marked as unordered. For ordered DATA |
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* chunks this field MUST be filled in. |
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*/ |
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struct sctp_fwdtsn_skip { |
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__be16 stream; |
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__be16 ssn; |
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}; |
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struct sctp_fwdtsn_hdr { |
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__be32 new_cum_tsn; |
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struct sctp_fwdtsn_skip skip[]; |
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}; |
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struct sctp_fwdtsn_chunk { |
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struct sctp_chunkhdr chunk_hdr; |
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struct sctp_fwdtsn_hdr fwdtsn_hdr; |
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}; |
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struct sctp_ifwdtsn_skip { |
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__be16 stream; |
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__u8 reserved; |
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__u8 flags; |
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__be32 mid; |
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}; |
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struct sctp_ifwdtsn_hdr { |
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__be32 new_cum_tsn; |
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struct sctp_ifwdtsn_skip skip[]; |
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}; |
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struct sctp_ifwdtsn_chunk { |
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struct sctp_chunkhdr chunk_hdr; |
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struct sctp_ifwdtsn_hdr fwdtsn_hdr; |
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}; |
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/* ADDIP |
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* Section 3.1.1 Address Configuration Change Chunk (ASCONF) |
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* |
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* Serial Number: 32 bits (unsigned integer) |
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* This value represents a Serial Number for the ASCONF Chunk. The |
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* valid range of Serial Number is from 0 to 2^32-1. |
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* Serial Numbers wrap back to 0 after reaching 2^32 -1. |
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* |
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* Address Parameter: 8 or 20 bytes (depending on type) |
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* The address is an address of the sender of the ASCONF chunk, |
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* the address MUST be considered part of the association by the |
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* peer endpoint. This field may be used by the receiver of the |
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* ASCONF to help in finding the association. This parameter MUST |
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* be present in every ASCONF message i.e. it is a mandatory TLV |
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* parameter. |
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* |
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* ASCONF Parameter: TLV format |
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* Each Address configuration change is represented by a TLV |
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* parameter as defined in Section 3.2. One or more requests may |
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* be present in an ASCONF Chunk. |
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* |
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* Section 3.1.2 Address Configuration Acknowledgement Chunk (ASCONF-ACK) |
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* |
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* Serial Number: 32 bits (unsigned integer) |
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* This value represents the Serial Number for the received ASCONF |
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* Chunk that is acknowledged by this chunk. This value is copied |
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* from the received ASCONF Chunk. |
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* |
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* ASCONF Parameter Response: TLV format |
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* The ASCONF Parameter Response is used in the ASCONF-ACK to |
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* report status of ASCONF processing. |
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*/ |
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struct sctp_addip_param { |
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struct sctp_paramhdr param_hdr; |
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__be32 crr_id; |
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}; |
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struct sctp_addiphdr { |
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__be32 serial; |
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__u8 params[]; |
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}; |
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struct sctp_addip_chunk { |
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struct sctp_chunkhdr chunk_hdr; |
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struct sctp_addiphdr addip_hdr; |
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}; |
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/* AUTH |
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* Section 4.1 Authentication Chunk (AUTH) |
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* |
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* This chunk is used to hold the result of the HMAC calculation. |
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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 = 0x0F | Flags=0 | Length | |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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* | Shared Key Identifier | HMAC Identifier | |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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* | | |
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* \ HMAC / |
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* / \ |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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* |
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* Type: 1 byte (unsigned integer) |
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* This value MUST be set to 0x0F for all AUTH-chunks. |
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* |
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* Flags: 1 byte (unsigned integer) |
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* Set to zero on transmit and ignored on receipt. |
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* |
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* Length: 2 bytes (unsigned integer) |
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* This value holds the length of the HMAC in bytes plus 8. |
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* |
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* Shared Key Identifier: 2 bytes (unsigned integer) |
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* This value describes which endpoint pair shared key is used. |
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* |
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* HMAC Identifier: 2 bytes (unsigned integer) |
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* This value describes which message digest is being used. Table 2 |
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* shows the currently defined values. |
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* |
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* The following Table 2 shows the currently defined values for HMAC |
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* identifiers. |
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* |
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* +-----------------+--------------------------+ |
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* | HMAC Identifier | Message Digest Algorithm | |
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* +-----------------+--------------------------+ |
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* | 0 | Reserved | |
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* | 1 | SHA-1 defined in [8] | |
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* | 2 | Reserved | |
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* | 3 | SHA-256 defined in [8] | |
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* +-----------------+--------------------------+ |
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* |
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* |
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* HMAC: n bytes (unsigned integer) This hold the result of the HMAC |
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* calculation. |
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*/ |
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struct sctp_authhdr { |
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__be16 shkey_id; |
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__be16 hmac_id; |
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__u8 hmac[]; |
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}; |
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struct sctp_auth_chunk { |
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struct sctp_chunkhdr chunk_hdr; |
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struct sctp_authhdr auth_hdr; |
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}; |
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struct sctp_infox { |
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struct sctp_info *sctpinfo; |
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struct sctp_association *asoc; |
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}; |
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struct sctp_reconf_chunk { |
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struct sctp_chunkhdr chunk_hdr; |
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__u8 params[]; |
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}; |
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struct sctp_strreset_outreq { |
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struct sctp_paramhdr param_hdr; |
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__be32 request_seq; |
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__be32 response_seq; |
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__be32 send_reset_at_tsn; |
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__be16 list_of_streams[]; |
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}; |
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struct sctp_strreset_inreq { |
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struct sctp_paramhdr param_hdr; |
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__be32 request_seq; |
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__be16 list_of_streams[]; |
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}; |
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struct sctp_strreset_tsnreq { |
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struct sctp_paramhdr param_hdr; |
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__be32 request_seq; |
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}; |
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struct sctp_strreset_addstrm { |
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struct sctp_paramhdr param_hdr; |
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__be32 request_seq; |
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__be16 number_of_streams; |
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__be16 reserved; |
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}; |
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enum { |
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SCTP_STRRESET_NOTHING_TO_DO = 0x00, |
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SCTP_STRRESET_PERFORMED = 0x01, |
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SCTP_STRRESET_DENIED = 0x02, |
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SCTP_STRRESET_ERR_WRONG_SSN = 0x03, |
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SCTP_STRRESET_ERR_IN_PROGRESS = 0x04, |
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SCTP_STRRESET_ERR_BAD_SEQNO = 0x05, |
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SCTP_STRRESET_IN_PROGRESS = 0x06, |
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}; |
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struct sctp_strreset_resp { |
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struct sctp_paramhdr param_hdr; |
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__be32 response_seq; |
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__be32 result; |
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}; |
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struct sctp_strreset_resptsn { |
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struct sctp_paramhdr param_hdr; |
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__be32 response_seq; |
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__be32 result; |
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__be32 senders_next_tsn; |
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__be32 receivers_next_tsn; |
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}; |
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|
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enum { |
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SCTP_DSCP_SET_MASK = 0x1, |
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SCTP_DSCP_VAL_MASK = 0xfc, |
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SCTP_FLOWLABEL_SET_MASK = 0x100000, |
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SCTP_FLOWLABEL_VAL_MASK = 0xfffff |
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}; |
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|
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/* UDP Encapsulation |
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* draft-tuexen-tsvwg-sctp-udp-encaps-cons-03.html#section-4-4 |
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* |
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* The error cause indicating an "Restart of an Association with |
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* New Encapsulation Port" |
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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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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
* | Cause Code = 14 | Cause Length = 8 | |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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* | Current Encapsulation Port | New Encapsulation Port | |
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* +-------------------------------+-------------------------------+ |
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*/ |
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struct sctp_new_encap_port_hdr { |
|
__be16 cur_port; |
|
__be16 new_port; |
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}; |
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|
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#endif /* __LINUX_SCTP_H__ */
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