| /* SCTP kernel reference Implementation |
| * (C) Copyright IBM Corp. 2001, 2004 |
| * Copyright (c) 1999-2000 Cisco, Inc. |
| * Copyright (c) 1999-2001 Motorola, Inc. |
| * Copyright (c) 2001 Intel Corp. |
| * Copyright (c) 2001 Nokia, Inc. |
| * Copyright (c) 2001 La Monte H.P. Yarroll |
| * |
| * This file is part of the SCTP kernel reference Implementation |
| * |
| * Various protocol defined structures. |
| * |
| * This SCTP implementation is free software; |
| * you can redistribute it and/or modify it under the terms of |
| * the GNU General Public License as published by |
| * the Free Software Foundation; either version 2, or (at your option) |
| * any later version. |
| * |
| * This SCTP implementation is distributed in the hope that it |
| * will be useful, but WITHOUT ANY WARRANTY; without even the implied |
| * ************************ |
| * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| * See the GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with GNU CC; see the file COPYING. If not, see |
| * <http://www.gnu.org/licenses/>. |
| * |
| * Please send any bug reports or fixes you make to the |
| * email address(es): |
| * lksctp developers <linux-sctp@vger.kernel.org> |
| * |
| * Or submit a bug report through the following website: |
| * http://www.sf.net/projects/lksctp |
| * |
| * Written or modified by: |
| * La Monte H.P. Yarroll <piggy@acm.org> |
| * Karl Knutson <karl@athena.chicago.il.us> |
| * Jon Grimm <jgrimm@us.ibm.com> |
| * Xingang Guo <xingang.guo@intel.com> |
| * randall@sctp.chicago.il.us |
| * kmorneau@cisco.com |
| * qxie1@email.mot.com |
| * Sridhar Samudrala <sri@us.ibm.com> |
| * Kevin Gao <kevin.gao@intel.com> |
| * |
| * Any bugs reported given to us we will try to fix... any fixes shared will |
| * be incorporated into the next SCTP release. |
| */ |
| #ifndef __LINUX_SCTP_H__ |
| #define __LINUX_SCTP_H__ |
| |
| #include <linux/in.h> /* We need in_addr. */ |
| #include <linux/in6.h> /* We need in6_addr. */ |
| #include <linux/skbuff.h> |
| |
| #include <uapi/linux/sctp.h> |
| |
| /* Section 3.1. SCTP Common Header Format */ |
| struct sctphdr { |
| __be16 source; |
| __be16 dest; |
| __be32 vtag; |
| __le32 checksum; |
| }; |
| |
| static inline struct sctphdr *sctp_hdr(const struct sk_buff *skb) |
| { |
| return (struct sctphdr *)skb_transport_header(skb); |
| } |
| |
| /* Section 3.2. Chunk Field Descriptions. */ |
| struct sctp_chunkhdr { |
| __u8 type; |
| __u8 flags; |
| __be16 length; |
| }; |
| |
| |
| /* Section 3.2. Chunk Type Values. |
| * [Chunk Type] identifies the type of information contained in the Chunk |
| * Value field. It takes a value from 0 to 254. The value of 255 is |
| * reserved for future use as an extension field. |
| */ |
| enum sctp_cid { |
| SCTP_CID_DATA = 0, |
| SCTP_CID_INIT = 1, |
| SCTP_CID_INIT_ACK = 2, |
| SCTP_CID_SACK = 3, |
| SCTP_CID_HEARTBEAT = 4, |
| SCTP_CID_HEARTBEAT_ACK = 5, |
| SCTP_CID_ABORT = 6, |
| SCTP_CID_SHUTDOWN = 7, |
| SCTP_CID_SHUTDOWN_ACK = 8, |
| SCTP_CID_ERROR = 9, |
| SCTP_CID_COOKIE_ECHO = 10, |
| SCTP_CID_COOKIE_ACK = 11, |
| SCTP_CID_ECN_ECNE = 12, |
| SCTP_CID_ECN_CWR = 13, |
| SCTP_CID_SHUTDOWN_COMPLETE = 14, |
| |
| /* AUTH Extension Section 4.1 */ |
| SCTP_CID_AUTH = 0x0F, |
| |
| /* sctp ndata 5.1. I-DATA */ |
| SCTP_CID_I_DATA = 0x40, |
| |
| /* PR-SCTP Sec 3.2 */ |
| SCTP_CID_FWD_TSN = 0xC0, |
| |
| /* Use hex, as defined in ADDIP sec. 3.1 */ |
| SCTP_CID_ASCONF = 0xC1, |
| SCTP_CID_I_FWD_TSN = 0xC2, |
| SCTP_CID_ASCONF_ACK = 0x80, |
| SCTP_CID_RECONF = 0x82, |
| }; /* enum */ |
| |
| |
| /* Section 3.2 |
| * Chunk Types are encoded such that the highest-order two bits specify |
| * the action that must be taken if the processing endpoint does not |
| * recognize the Chunk Type. |
| */ |
| enum { |
| SCTP_CID_ACTION_DISCARD = 0x00, |
| SCTP_CID_ACTION_DISCARD_ERR = 0x40, |
| SCTP_CID_ACTION_SKIP = 0x80, |
| SCTP_CID_ACTION_SKIP_ERR = 0xc0, |
| }; |
| |
| enum { SCTP_CID_ACTION_MASK = 0xc0, }; |
| |
| /* This flag is used in Chunk Flags for ABORT and SHUTDOWN COMPLETE. |
| * |
| * 3.3.7 Abort Association (ABORT) (6): |
| * The T bit is set to 0 if the sender had a TCB that it destroyed. |
| * If the sender did not have a TCB it should set this bit to 1. |
| */ |
| enum { SCTP_CHUNK_FLAG_T = 0x01 }; |
| |
| /* |
| * Set the T bit |
| * |
| * 0 1 2 3 |
| * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
| * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| * | Type = 14 |Reserved |T| Length = 4 | |
| * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| * |
| * Chunk Flags: 8 bits |
| * |
| * Reserved: 7 bits |
| * Set to 0 on transmit and ignored on receipt. |
| * |
| * T bit: 1 bit |
| * The T bit is set to 0 if the sender had a TCB that it destroyed. If |
| * the sender did NOT have a TCB it should set this bit to 1. |
| * |
| * Note: Special rules apply to this chunk for verification, please |
| * see Section 8.5.1 for details. |
| */ |
| |
| #define sctp_test_T_bit(c) ((c)->chunk_hdr->flags & SCTP_CHUNK_FLAG_T) |
| |
| /* RFC 2960 |
| * Section 3.2.1 Optional/Variable-length Parmaeter Format. |
| */ |
| |
| struct sctp_paramhdr { |
| __be16 type; |
| __be16 length; |
| }; |
| |
| enum sctp_param { |
| |
| /* RFC 2960 Section 3.3.5 */ |
| SCTP_PARAM_HEARTBEAT_INFO = cpu_to_be16(1), |
| /* RFC 2960 Section 3.3.2.1 */ |
| SCTP_PARAM_IPV4_ADDRESS = cpu_to_be16(5), |
| SCTP_PARAM_IPV6_ADDRESS = cpu_to_be16(6), |
| SCTP_PARAM_STATE_COOKIE = cpu_to_be16(7), |
| SCTP_PARAM_UNRECOGNIZED_PARAMETERS = cpu_to_be16(8), |
| SCTP_PARAM_COOKIE_PRESERVATIVE = cpu_to_be16(9), |
| SCTP_PARAM_HOST_NAME_ADDRESS = cpu_to_be16(11), |
| SCTP_PARAM_SUPPORTED_ADDRESS_TYPES = cpu_to_be16(12), |
| SCTP_PARAM_ECN_CAPABLE = cpu_to_be16(0x8000), |
| |
| /* AUTH Extension Section 3 */ |
| SCTP_PARAM_RANDOM = cpu_to_be16(0x8002), |
| SCTP_PARAM_CHUNKS = cpu_to_be16(0x8003), |
| SCTP_PARAM_HMAC_ALGO = cpu_to_be16(0x8004), |
| |
| /* Add-IP: Supported Extensions, Section 4.2 */ |
| SCTP_PARAM_SUPPORTED_EXT = cpu_to_be16(0x8008), |
| |
| /* PR-SCTP Sec 3.1 */ |
| SCTP_PARAM_FWD_TSN_SUPPORT = cpu_to_be16(0xc000), |
| |
| /* Add-IP Extension. Section 3.2 */ |
| SCTP_PARAM_ADD_IP = cpu_to_be16(0xc001), |
| SCTP_PARAM_DEL_IP = cpu_to_be16(0xc002), |
| SCTP_PARAM_ERR_CAUSE = cpu_to_be16(0xc003), |
| SCTP_PARAM_SET_PRIMARY = cpu_to_be16(0xc004), |
| SCTP_PARAM_SUCCESS_REPORT = cpu_to_be16(0xc005), |
| SCTP_PARAM_ADAPTATION_LAYER_IND = cpu_to_be16(0xc006), |
| |
| /* RE-CONFIG. Section 4 */ |
| SCTP_PARAM_RESET_OUT_REQUEST = cpu_to_be16(0x000d), |
| SCTP_PARAM_RESET_IN_REQUEST = cpu_to_be16(0x000e), |
| SCTP_PARAM_RESET_TSN_REQUEST = cpu_to_be16(0x000f), |
| SCTP_PARAM_RESET_RESPONSE = cpu_to_be16(0x0010), |
| SCTP_PARAM_RESET_ADD_OUT_STREAMS = cpu_to_be16(0x0011), |
| SCTP_PARAM_RESET_ADD_IN_STREAMS = cpu_to_be16(0x0012), |
| }; /* enum */ |
| |
| |
| /* RFC 2960 Section 3.2.1 |
| * The Parameter Types are encoded such that the highest-order two bits |
| * specify the action that must be taken if the processing endpoint does |
| * not recognize the Parameter Type. |
| * |
| */ |
| enum { |
| SCTP_PARAM_ACTION_DISCARD = cpu_to_be16(0x0000), |
| SCTP_PARAM_ACTION_DISCARD_ERR = cpu_to_be16(0x4000), |
| SCTP_PARAM_ACTION_SKIP = cpu_to_be16(0x8000), |
| SCTP_PARAM_ACTION_SKIP_ERR = cpu_to_be16(0xc000), |
| }; |
| |
| enum { SCTP_PARAM_ACTION_MASK = cpu_to_be16(0xc000), }; |
| |
| /* RFC 2960 Section 3.3.1 Payload Data (DATA) (0) */ |
| |
| struct sctp_datahdr { |
| __be32 tsn; |
| __be16 stream; |
| __be16 ssn; |
| __u32 ppid; |
| __u8 payload[0]; |
| }; |
| |
| struct sctp_data_chunk { |
| struct sctp_chunkhdr chunk_hdr; |
| struct sctp_datahdr data_hdr; |
| }; |
| |
| struct sctp_idatahdr { |
| __be32 tsn; |
| __be16 stream; |
| __be16 reserved; |
| __be32 mid; |
| union { |
| __u32 ppid; |
| __be32 fsn; |
| }; |
| __u8 payload[0]; |
| }; |
| |
| struct sctp_idata_chunk { |
| struct sctp_chunkhdr chunk_hdr; |
| struct sctp_idatahdr data_hdr; |
| }; |
| |
| /* DATA Chuck Specific Flags */ |
| enum { |
| SCTP_DATA_MIDDLE_FRAG = 0x00, |
| SCTP_DATA_LAST_FRAG = 0x01, |
| SCTP_DATA_FIRST_FRAG = 0x02, |
| SCTP_DATA_NOT_FRAG = 0x03, |
| SCTP_DATA_UNORDERED = 0x04, |
| SCTP_DATA_SACK_IMM = 0x08, |
| }; |
| enum { SCTP_DATA_FRAG_MASK = 0x03, }; |
| |
| |
| /* RFC 2960 Section 3.3.2 Initiation (INIT) (1) |
| * |
| * This chunk is used to initiate a SCTP association between two |
| * endpoints. |
| */ |
| struct sctp_inithdr { |
| __be32 init_tag; |
| __be32 a_rwnd; |
| __be16 num_outbound_streams; |
| __be16 num_inbound_streams; |
| __be32 initial_tsn; |
| __u8 params[0]; |
| }; |
| |
| struct sctp_init_chunk { |
| struct sctp_chunkhdr chunk_hdr; |
| struct sctp_inithdr init_hdr; |
| }; |
| |
| |
| /* Section 3.3.2.1. IPv4 Address Parameter (5) */ |
| struct sctp_ipv4addr_param { |
| struct sctp_paramhdr param_hdr; |
| struct in_addr addr; |
| }; |
| |
| /* Section 3.3.2.1. IPv6 Address Parameter (6) */ |
| struct sctp_ipv6addr_param { |
| struct sctp_paramhdr param_hdr; |
| struct in6_addr addr; |
| }; |
| |
| /* Section 3.3.2.1 Cookie Preservative (9) */ |
| struct sctp_cookie_preserve_param { |
| struct sctp_paramhdr param_hdr; |
| __be32 lifespan_increment; |
| }; |
| |
| /* Section 3.3.2.1 Host Name Address (11) */ |
| struct sctp_hostname_param { |
| struct sctp_paramhdr param_hdr; |
| uint8_t hostname[0]; |
| }; |
| |
| /* Section 3.3.2.1 Supported Address Types (12) */ |
| struct sctp_supported_addrs_param { |
| struct sctp_paramhdr param_hdr; |
| __be16 types[0]; |
| }; |
| |
| /* ADDIP Section 3.2.6 Adaptation Layer Indication */ |
| struct sctp_adaptation_ind_param { |
| struct sctp_paramhdr param_hdr; |
| __be32 adaptation_ind; |
| }; |
| |
| /* ADDIP Section 4.2.7 Supported Extensions Parameter */ |
| struct sctp_supported_ext_param { |
| struct sctp_paramhdr param_hdr; |
| __u8 chunks[0]; |
| }; |
| |
| /* AUTH Section 3.1 Random */ |
| struct sctp_random_param { |
| struct sctp_paramhdr param_hdr; |
| __u8 random_val[0]; |
| }; |
| |
| /* AUTH Section 3.2 Chunk List */ |
| struct sctp_chunks_param { |
| struct sctp_paramhdr param_hdr; |
| __u8 chunks[0]; |
| }; |
| |
| /* AUTH Section 3.3 HMAC Algorithm */ |
| struct sctp_hmac_algo_param { |
| struct sctp_paramhdr param_hdr; |
| __be16 hmac_ids[0]; |
| }; |
| |
| /* RFC 2960. Section 3.3.3 Initiation Acknowledgement (INIT ACK) (2): |
| * The INIT ACK chunk is used to acknowledge the initiation of an SCTP |
| * association. |
| */ |
| struct sctp_initack_chunk { |
| struct sctp_chunkhdr chunk_hdr; |
| struct sctp_inithdr init_hdr; |
| }; |
| |
| /* Section 3.3.3.1 State Cookie (7) */ |
| struct sctp_cookie_param { |
| struct sctp_paramhdr p; |
| __u8 body[0]; |
| }; |
| |
| /* Section 3.3.3.1 Unrecognized Parameters (8) */ |
| struct sctp_unrecognized_param { |
| struct sctp_paramhdr param_hdr; |
| struct sctp_paramhdr unrecognized; |
| }; |
| |
| |
| |
| /* |
| * 3.3.4 Selective Acknowledgement (SACK) (3): |
| * |
| * This chunk is sent to the peer endpoint to acknowledge received DATA |
| * chunks and to inform the peer endpoint of gaps in the received |
| * subsequences of DATA chunks as represented by their TSNs. |
| */ |
| |
| struct sctp_gap_ack_block { |
| __be16 start; |
| __be16 end; |
| }; |
| |
| union sctp_sack_variable { |
| struct sctp_gap_ack_block gab; |
| __be32 dup; |
| }; |
| |
| struct sctp_sackhdr { |
| __be32 cum_tsn_ack; |
| __be32 a_rwnd; |
| __be16 num_gap_ack_blocks; |
| __be16 num_dup_tsns; |
| union sctp_sack_variable variable[0]; |
| }; |
| |
| struct sctp_sack_chunk { |
| struct sctp_chunkhdr chunk_hdr; |
| struct sctp_sackhdr sack_hdr; |
| }; |
| |
| |
| /* RFC 2960. Section 3.3.5 Heartbeat Request (HEARTBEAT) (4): |
| * |
| * An endpoint should send this chunk to its peer endpoint to probe the |
| * reachability of a particular destination transport address defined in |
| * the present association. |
| */ |
| |
| struct sctp_heartbeathdr { |
| struct sctp_paramhdr info; |
| }; |
| |
| struct sctp_heartbeat_chunk { |
| struct sctp_chunkhdr chunk_hdr; |
| struct sctp_heartbeathdr hb_hdr; |
| }; |
| |
| |
| /* For the abort and shutdown ACK we must carry the init tag in the |
| * common header. Just the common header is all that is needed with a |
| * chunk descriptor. |
| */ |
| struct sctp_abort_chunk { |
| struct sctp_chunkhdr uh; |
| }; |
| |
| |
| /* For the graceful shutdown we must carry the tag (in common header) |
| * and the highest consecutive acking value. |
| */ |
| struct sctp_shutdownhdr { |
| __be32 cum_tsn_ack; |
| }; |
| |
| struct sctp_shutdown_chunk { |
| struct sctp_chunkhdr chunk_hdr; |
| struct sctp_shutdownhdr shutdown_hdr; |
| }; |
| |
| /* RFC 2960. Section 3.3.10 Operation Error (ERROR) (9) */ |
| |
| struct sctp_errhdr { |
| __be16 cause; |
| __be16 length; |
| __u8 variable[0]; |
| }; |
| |
| struct sctp_operr_chunk { |
| struct sctp_chunkhdr chunk_hdr; |
| struct sctp_errhdr err_hdr; |
| }; |
| |
| /* RFC 2960 3.3.10 - Operation Error |
| * |
| * Cause Code: 16 bits (unsigned integer) |
| * |
| * Defines the type of error conditions being reported. |
| * Cause Code |
| * Value Cause Code |
| * --------- ---------------- |
| * 1 Invalid Stream Identifier |
| * 2 Missing Mandatory Parameter |
| * 3 Stale Cookie Error |
| * 4 Out of Resource |
| * 5 Unresolvable Address |
| * 6 Unrecognized Chunk Type |
| * 7 Invalid Mandatory Parameter |
| * 8 Unrecognized Parameters |
| * 9 No User Data |
| * 10 Cookie Received While Shutting Down |
| */ |
| enum sctp_error { |
| |
| SCTP_ERROR_NO_ERROR = cpu_to_be16(0x00), |
| SCTP_ERROR_INV_STRM = cpu_to_be16(0x01), |
| SCTP_ERROR_MISS_PARAM = cpu_to_be16(0x02), |
| SCTP_ERROR_STALE_COOKIE = cpu_to_be16(0x03), |
| SCTP_ERROR_NO_RESOURCE = cpu_to_be16(0x04), |
| SCTP_ERROR_DNS_FAILED = cpu_to_be16(0x05), |
| SCTP_ERROR_UNKNOWN_CHUNK = cpu_to_be16(0x06), |
| SCTP_ERROR_INV_PARAM = cpu_to_be16(0x07), |
| SCTP_ERROR_UNKNOWN_PARAM = cpu_to_be16(0x08), |
| SCTP_ERROR_NO_DATA = cpu_to_be16(0x09), |
| SCTP_ERROR_COOKIE_IN_SHUTDOWN = cpu_to_be16(0x0a), |
| |
| |
| /* SCTP Implementation Guide: |
| * 11 Restart of an association with new addresses |
| * 12 User Initiated Abort |
| * 13 Protocol Violation |
| */ |
| |
| SCTP_ERROR_RESTART = cpu_to_be16(0x0b), |
| SCTP_ERROR_USER_ABORT = cpu_to_be16(0x0c), |
| SCTP_ERROR_PROTO_VIOLATION = cpu_to_be16(0x0d), |
| |
| /* ADDIP Section 3.3 New Error Causes |
| * |
| * Four new Error Causes are added to the SCTP Operational Errors, |
| * primarily for use in the ASCONF-ACK chunk. |
| * |
| * Value Cause Code |
| * --------- ---------------- |
| * 0x00A0 Request to Delete Last Remaining IP Address. |
| * 0x00A1 Operation Refused Due to Resource Shortage. |
| * 0x00A2 Request to Delete Source IP Address. |
| * 0x00A3 Association Aborted due to illegal ASCONF-ACK |
| * 0x00A4 Request refused - no authorization. |
| */ |
| SCTP_ERROR_DEL_LAST_IP = cpu_to_be16(0x00A0), |
| SCTP_ERROR_RSRC_LOW = cpu_to_be16(0x00A1), |
| SCTP_ERROR_DEL_SRC_IP = cpu_to_be16(0x00A2), |
| SCTP_ERROR_ASCONF_ACK = cpu_to_be16(0x00A3), |
| SCTP_ERROR_REQ_REFUSED = cpu_to_be16(0x00A4), |
| |
| /* AUTH Section 4. New Error Cause |
| * |
| * This section defines a new error cause that will be sent if an AUTH |
| * chunk is received with an unsupported HMAC identifier. |
| * illustrates the new error cause. |
| * |
| * Cause Code Error Cause Name |
| * -------------------------------------------------------------- |
| * 0x0105 Unsupported HMAC Identifier |
| */ |
| SCTP_ERROR_UNSUP_HMAC = cpu_to_be16(0x0105) |
| }; |
| |
| |
| |
| /* RFC 2960. Appendix A. Explicit Congestion Notification. |
| * Explicit Congestion Notification Echo (ECNE) (12) |
| */ |
| struct sctp_ecnehdr { |
| __be32 lowest_tsn; |
| }; |
| |
| struct sctp_ecne_chunk { |
| struct sctp_chunkhdr chunk_hdr; |
| struct sctp_ecnehdr ence_hdr; |
| }; |
| |
| /* RFC 2960. Appendix A. Explicit Congestion Notification. |
| * Congestion Window Reduced (CWR) (13) |
| */ |
| struct sctp_cwrhdr { |
| __be32 lowest_tsn; |
| }; |
| |
| /* 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; |
| }; |
| |
| struct sctp_fwdtsn_hdr { |
| __be32 new_cum_tsn; |
| struct sctp_fwdtsn_skip skip[0]; |
| }; |
| |
| struct sctp_fwdtsn_chunk { |
| struct sctp_chunkhdr chunk_hdr; |
| struct sctp_fwdtsn_hdr fwdtsn_hdr; |
| }; |
| |
| struct sctp_ifwdtsn_skip { |
| __be16 stream; |
| __u8 reserved; |
| __u8 flags; |
| __be32 mid; |
| }; |
| |
| struct sctp_ifwdtsn_hdr { |
| __be32 new_cum_tsn; |
| struct sctp_ifwdtsn_skip skip[0]; |
| }; |
| |
| struct sctp_ifwdtsn_chunk { |
| struct sctp_chunkhdr chunk_hdr; |
| struct sctp_ifwdtsn_hdr fwdtsn_hdr; |
| }; |
| |
| /* 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. |
| */ |
| struct sctp_addip_param { |
| struct sctp_paramhdr param_hdr; |
| __be32 crr_id; |
| }; |
| |
| struct sctp_addiphdr { |
| __be32 serial; |
| __u8 params[0]; |
| }; |
| |
| struct sctp_addip_chunk { |
| struct sctp_chunkhdr chunk_hdr; |
| struct sctp_addiphdr addip_hdr; |
| }; |
| |
| /* 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. |
| */ |
| struct sctp_authhdr { |
| __be16 shkey_id; |
| __be16 hmac_id; |
| __u8 hmac[0]; |
| }; |
| |
| struct sctp_auth_chunk { |
| struct sctp_chunkhdr chunk_hdr; |
| struct sctp_authhdr auth_hdr; |
| }; |
| |
| struct sctp_infox { |
| struct sctp_info *sctpinfo; |
| struct sctp_association *asoc; |
| }; |
| |
| struct sctp_reconf_chunk { |
| struct sctp_chunkhdr chunk_hdr; |
| __u8 params[0]; |
| }; |
| |
| struct sctp_strreset_outreq { |
| struct sctp_paramhdr param_hdr; |
| __be32 request_seq; |
| __be32 response_seq; |
| __be32 send_reset_at_tsn; |
| __be16 list_of_streams[0]; |
| }; |
| |
| struct sctp_strreset_inreq { |
| struct sctp_paramhdr param_hdr; |
| __be32 request_seq; |
| __be16 list_of_streams[0]; |
| }; |
| |
| struct sctp_strreset_tsnreq { |
| struct sctp_paramhdr param_hdr; |
| __be32 request_seq; |
| }; |
| |
| struct sctp_strreset_addstrm { |
| struct sctp_paramhdr param_hdr; |
| __be32 request_seq; |
| __be16 number_of_streams; |
| __be16 reserved; |
| }; |
| |
| enum { |
| SCTP_STRRESET_NOTHING_TO_DO = 0x00, |
| SCTP_STRRESET_PERFORMED = 0x01, |
| SCTP_STRRESET_DENIED = 0x02, |
| SCTP_STRRESET_ERR_WRONG_SSN = 0x03, |
| SCTP_STRRESET_ERR_IN_PROGRESS = 0x04, |
| SCTP_STRRESET_ERR_BAD_SEQNO = 0x05, |
| SCTP_STRRESET_IN_PROGRESS = 0x06, |
| }; |
| |
| struct sctp_strreset_resp { |
| struct sctp_paramhdr param_hdr; |
| __be32 response_seq; |
| __be32 result; |
| }; |
| |
| struct sctp_strreset_resptsn { |
| struct sctp_paramhdr param_hdr; |
| __be32 response_seq; |
| __be32 result; |
| __be32 senders_next_tsn; |
| __be32 receivers_next_tsn; |
| }; |
| |
| #endif /* __LINUX_SCTP_H__ */ |