/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
* Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
* Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* a) Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* b) Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the distribution.
*
* c) Neither the name of Cisco Systems, Inc. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#ifndef _NETINET_SCTP_HEADER_H_
#define _NETINET_SCTP_HEADER_H_
#include <sys/time.h>
#include <netinet/sctp.h>
#include <netinet/sctp_constants.h>
#define SCTP_PACKED __attribute__((packed))
/*
* Parameter structures
*/
struct sctp_ipv4addr_param {
struct sctp_paramhdr ph; /* type=SCTP_IPV4_PARAM_TYPE, len=8 */
uint32_t addr; /* IPV4 address */
} SCTP_PACKED;
#define SCTP_V6_ADDR_BYTES 16
struct sctp_ipv6addr_param {
struct sctp_paramhdr ph; /* type=SCTP_IPV6_PARAM_TYPE, len=20 */
uint8_t addr[SCTP_V6_ADDR_BYTES]; /* IPV6 address */
} SCTP_PACKED;
/* Cookie Preservative */
struct sctp_cookie_perserve_param {
struct sctp_paramhdr ph; /* type=SCTP_COOKIE_PRESERVE, len=8 */
uint32_t time; /* time in ms to extend cookie */
} SCTP_PACKED;
#define SCTP_ARRAY_MIN_LEN 1
/* Host Name Address */
struct sctp_host_name_param {
struct sctp_paramhdr ph; /* type=SCTP_HOSTNAME_ADDRESS */
char name[SCTP_ARRAY_MIN_LEN]; /* host name */
} SCTP_PACKED;
/*
* This is the maximum padded size of a s-a-p
* so paramheadr + 3 address types (6 bytes) + 2 byte pad = 12
*/
#define SCTP_MAX_ADDR_PARAMS_SIZE 12
/* supported address type */
struct sctp_supported_addr_param {
struct sctp_paramhdr ph; /* type=SCTP_SUPPORTED_ADDRTYPE */
uint16_t addr_type[2]; /* array of supported address types */
} SCTP_PACKED;
/* heartbeat info parameter */
struct sctp_heartbeat_info_param {
struct sctp_paramhdr ph;
uint32_t time_value_1;
uint32_t time_value_2;
uint32_t random_value1;
uint32_t random_value2;
uint8_t addr_family;
uint8_t addr_len;
/* make sure that this structure is 4 byte aligned */
uint8_t padding[2];
char address[SCTP_ADDRMAX];
} SCTP_PACKED;
/* draft-ietf-tsvwg-prsctp */
/* PR-SCTP supported parameter */
struct sctp_prsctp_supported_param {
struct sctp_paramhdr ph;
} SCTP_PACKED;
/* draft-ietf-tsvwg-addip-sctp */
struct sctp_asconf_paramhdr { /* an ASCONF "parameter" */
struct sctp_paramhdr ph; /* a SCTP parameter header */
uint32_t correlation_id; /* correlation id for this param */
} SCTP_PACKED;
struct sctp_asconf_addr_param { /* an ASCONF address parameter */
struct sctp_asconf_paramhdr aph; /* asconf "parameter" */
struct sctp_ipv6addr_param addrp; /* max storage size */
} SCTP_PACKED;
struct sctp_asconf_tag_param { /* an ASCONF NAT-Vtag parameter */
struct sctp_asconf_paramhdr aph; /* asconf "parameter" */
uint32_t local_vtag;
uint32_t remote_vtag;
} SCTP_PACKED;
struct sctp_asconf_addrv4_param { /* an ASCONF address (v4) parameter */
struct sctp_asconf_paramhdr aph; /* asconf "parameter" */
struct sctp_ipv4addr_param addrp; /* max storage size */
} SCTP_PACKED;
#define SCTP_MAX_SUPPORTED_EXT 256
struct sctp_supported_chunk_types_param {
struct sctp_paramhdr ph; /* type = 0x8008 len = x */
uint8_t chunk_types[];
} SCTP_PACKED;
/*
* Structures for DATA chunks
*/
struct sctp_data {
uint32_t tsn;
uint16_t sid;
uint16_t ssn;
uint32_t ppid;
/* user data follows */
} SCTP_PACKED;
struct sctp_data_chunk {
struct sctp_chunkhdr ch;
struct sctp_data dp;
} SCTP_PACKED;
struct sctp_idata {
uint32_t tsn;
uint16_t sid;
uint16_t reserved; /* Where does the SSN go? */
uint32_t mid;
union {
uint32_t ppid;
uint32_t fsn; /* Fragment Sequence Number */
} ppid_fsn;
/* user data follows */
} SCTP_PACKED;
struct sctp_idata_chunk {
struct sctp_chunkhdr ch;
struct sctp_idata dp;
} SCTP_PACKED;
/*
* Structures for the control chunks
*/
/* Initiate (INIT)/Initiate Ack (INIT ACK) */
struct sctp_init {
uint32_t initiate_tag; /* initiate tag */
uint32_t a_rwnd; /* a_rwnd */
uint16_t num_outbound_streams; /* OS */
uint16_t num_inbound_streams; /* MIS */
uint32_t initial_tsn; /* I-TSN */
/* optional param's follow */
} SCTP_PACKED;
#define SCTP_IDENTIFICATION_SIZE 16
#define SCTP_ADDRESS_SIZE 4
#define SCTP_RESERVE_SPACE 6
/* state cookie header */
struct sctp_state_cookie { /* this is our definition... */
uint8_t identification[SCTP_IDENTIFICATION_SIZE]; /* id of who we are */
struct timeval time_entered; /* the time I built cookie */
uint32_t cookie_life; /* life I will award this cookie */
uint32_t tie_tag_my_vtag; /* my tag in old association */
uint32_t tie_tag_peer_vtag; /* peers tag in old association */
uint32_t peers_vtag; /* peers tag in INIT (for quick ref) */
uint32_t my_vtag; /* my tag in INIT-ACK (for quick ref) */
uint32_t address[SCTP_ADDRESS_SIZE]; /* 4 ints/128 bits */
uint32_t addr_type; /* address type */
uint32_t laddress[SCTP_ADDRESS_SIZE]; /* my local from address */
uint32_t laddr_type; /* my local from address type */
uint32_t scope_id; /* v6 scope id for link-locals */
uint16_t peerport; /* port address of the peer in the INIT */
uint16_t myport; /* my port address used in the INIT */
uint8_t ipv4_addr_legal; /* Are V4 addr legal? */
uint8_t ipv6_addr_legal; /* Are V6 addr legal? */
uint8_t local_scope; /* IPv6 local scope flag */
uint8_t site_scope; /* IPv6 site scope flag */
uint8_t ipv4_scope; /* IPv4 private addr scope */
uint8_t loopback_scope; /* loopback scope information */
uint8_t reserved[SCTP_RESERVE_SPACE]; /* Align to 64 bits */
/*
* at the end is tacked on the INIT chunk and the INIT-ACK chunk
* (minus the cookie).
*/
} SCTP_PACKED;
/* state cookie parameter */
struct sctp_state_cookie_param {
struct sctp_paramhdr ph;
struct sctp_state_cookie cookie;
} SCTP_PACKED;
struct sctp_init_chunk {
struct sctp_chunkhdr ch;
struct sctp_init init;
} SCTP_PACKED;
struct sctp_init_msg {
struct sctphdr sh;
struct sctp_init_chunk msg;
} SCTP_PACKED;
/* ... used for both INIT and INIT ACK */
#define sctp_init_ack sctp_init
#define sctp_init_ack_chunk sctp_init_chunk
#define sctp_init_ack_msg sctp_init_msg
/* Selective Ack (SACK) */
struct sctp_gap_ack_block {
uint16_t start; /* Gap Ack block start */
uint16_t end; /* Gap Ack block end */
} SCTP_PACKED;
struct sctp_sack {
uint32_t cum_tsn_ack; /* cumulative TSN Ack */
uint32_t a_rwnd; /* updated a_rwnd of sender */
uint16_t num_gap_ack_blks; /* number of Gap Ack blocks */
uint16_t num_dup_tsns; /* number of duplicate TSNs */
/* struct sctp_gap_ack_block's follow */
/* uint32_t duplicate_tsn's follow */
} SCTP_PACKED;
struct sctp_sack_chunk {
struct sctp_chunkhdr ch;
struct sctp_sack sack;
} SCTP_PACKED;
struct sctp_nr_sack {
uint32_t cum_tsn_ack; /* cumulative TSN Ack */
uint32_t a_rwnd; /* updated a_rwnd of sender */
uint16_t num_gap_ack_blks; /* number of Gap Ack blocks */
uint16_t num_nr_gap_ack_blks; /* number of NR Gap Ack blocks */
uint16_t num_dup_tsns; /* number of duplicate TSNs */
uint16_t reserved; /* not currently used */
/* struct sctp_gap_ack_block's follow */
/* uint32_t duplicate_tsn's follow */
} SCTP_PACKED;
struct sctp_nr_sack_chunk {
struct sctp_chunkhdr ch;
struct sctp_nr_sack nr_sack;
} SCTP_PACKED;
/* Heartbeat Request (HEARTBEAT) */
struct sctp_heartbeat {
struct sctp_heartbeat_info_param hb_info;
} SCTP_PACKED;
struct sctp_heartbeat_chunk {
struct sctp_chunkhdr ch;
struct sctp_heartbeat heartbeat;
} SCTP_PACKED;
/* ... used for Heartbeat Ack (HEARTBEAT ACK) */
#define sctp_heartbeat_ack sctp_heartbeat
#define sctp_heartbeat_ack_chunk sctp_heartbeat_chunk
/* Abort Asssociation (ABORT) */
struct sctp_abort_chunk {
struct sctp_chunkhdr ch;
/* optional error cause may follow */
} SCTP_PACKED;
struct sctp_abort_msg {
struct sctphdr sh;
struct sctp_abort_chunk msg;
} SCTP_PACKED;
/* Shutdown Association (SHUTDOWN) */
struct sctp_shutdown_chunk {
struct sctp_chunkhdr ch;
uint32_t cumulative_tsn_ack;
} SCTP_PACKED;
/* Shutdown Acknowledgment (SHUTDOWN ACK) */
struct sctp_shutdown_ack_chunk {
struct sctp_chunkhdr ch;
} SCTP_PACKED;
/* Operation Error (ERROR) */
struct sctp_error_chunk {
struct sctp_chunkhdr ch;
/* optional error causes follow */
} SCTP_PACKED;
/* Cookie Echo (COOKIE ECHO) */
struct sctp_cookie_echo_chunk {
struct sctp_chunkhdr ch;
struct sctp_state_cookie cookie;
} SCTP_PACKED;
/* Cookie Acknowledgment (COOKIE ACK) */
struct sctp_cookie_ack_chunk {
struct sctp_chunkhdr ch;
} SCTP_PACKED;
/* Explicit Congestion Notification Echo (ECNE) */
struct old_sctp_ecne_chunk {
struct sctp_chunkhdr ch;
uint32_t tsn;
} SCTP_PACKED;
struct sctp_ecne_chunk {
struct sctp_chunkhdr ch;
uint32_t tsn;
uint32_t num_pkts_since_cwr;
} SCTP_PACKED;
/* Congestion Window Reduced (CWR) */
struct sctp_cwr_chunk {
struct sctp_chunkhdr ch;
uint32_t tsn;
} SCTP_PACKED;
/* Shutdown Complete (SHUTDOWN COMPLETE) */
struct sctp_shutdown_complete_chunk {
struct sctp_chunkhdr ch;
} SCTP_PACKED;
struct sctp_adaptation_layer_indication {
struct sctp_paramhdr ph;
uint32_t indication;
} SCTP_PACKED;
/*
* draft-ietf-tsvwg-addip-sctp
*/
/* Address/Stream Configuration Change (ASCONF) */
struct sctp_asconf_chunk {
struct sctp_chunkhdr ch;
uint32_t serial_number;
/* lookup address parameter (mandatory) */
/* asconf parameters follow */
} SCTP_PACKED;
/* Address/Stream Configuration Acknowledge (ASCONF ACK) */
struct sctp_asconf_ack_chunk {
struct sctp_chunkhdr ch;
uint32_t serial_number;
/* asconf parameters follow */
} SCTP_PACKED;
/* draft-ietf-tsvwg-prsctp */
/* Forward Cumulative TSN (FORWARD TSN) */
struct sctp_forward_tsn_chunk {
struct sctp_chunkhdr ch;
uint32_t new_cumulative_tsn;
/* stream/sequence pairs (sctp_strseq) follow */
} SCTP_PACKED;
struct sctp_strseq {
uint16_t sid;
uint16_t ssn;
} SCTP_PACKED;
struct sctp_strseq_mid {
uint16_t sid;
uint16_t flags;
uint32_t mid;
};
struct sctp_forward_tsn_msg {
struct sctphdr sh;
struct sctp_forward_tsn_chunk msg;
} SCTP_PACKED;
/* should be a multiple of 4 - 1 aka 3/7/11 etc. */
#define SCTP_NUM_DB_TO_VERIFY 31
struct sctp_chunk_desc {
uint8_t chunk_type;
uint8_t data_bytes[SCTP_NUM_DB_TO_VERIFY];
uint32_t tsn_ifany;
} SCTP_PACKED;
struct sctp_pktdrop_chunk {
struct sctp_chunkhdr ch;
uint32_t bottle_bw;
uint32_t current_onq;
uint16_t trunc_len;
uint16_t reserved;
uint8_t data[];
} SCTP_PACKED;
/**********STREAM RESET STUFF ******************/
struct sctp_stream_reset_request {
struct sctp_paramhdr ph;
uint32_t request_seq;
} SCTP_PACKED;
struct sctp_stream_reset_out_request {
struct sctp_paramhdr ph;
uint32_t request_seq; /* monotonically increasing seq no */
uint32_t response_seq; /* if a response, the resp seq no */
uint32_t send_reset_at_tsn; /* last TSN I assigned outbound */
uint16_t list_of_streams[]; /* if not all list of streams */
} SCTP_PACKED;
struct sctp_stream_reset_in_request {
struct sctp_paramhdr ph;
uint32_t request_seq;
uint16_t list_of_streams[]; /* if not all list of streams */
} SCTP_PACKED;
struct sctp_stream_reset_tsn_request {
struct sctp_paramhdr ph;
uint32_t request_seq;
} SCTP_PACKED;
struct sctp_stream_reset_response {
struct sctp_paramhdr ph;
uint32_t response_seq; /* if a response, the resp seq no */
uint32_t result;
} SCTP_PACKED;
struct sctp_stream_reset_response_tsn {
struct sctp_paramhdr ph;
uint32_t response_seq; /* if a response, the resp seq no */
uint32_t result;
uint32_t senders_next_tsn;
uint32_t receivers_next_tsn;
} SCTP_PACKED;
struct sctp_stream_reset_add_strm {
struct sctp_paramhdr ph;
uint32_t request_seq;
uint16_t number_of_streams;
uint16_t reserved;
} SCTP_PACKED;
#define SCTP_STREAM_RESET_RESULT_NOTHING_TO_DO 0x00000000 /* XXX: unused */
#define SCTP_STREAM_RESET_RESULT_PERFORMED 0x00000001
#define SCTP_STREAM_RESET_RESULT_DENIED 0x00000002
#define SCTP_STREAM_RESET_RESULT_ERR__WRONG_SSN 0x00000003 /* XXX: unused */
#define SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS 0x00000004
#define SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO 0x00000005
#define SCTP_STREAM_RESET_RESULT_IN_PROGRESS 0x00000006 /* XXX: unused */
/*
* convience structures, note that if you are making a request for specific
* streams then the request will need to be an overlay structure.
*/
struct sctp_stream_reset_tsn_req {
struct sctp_chunkhdr ch;
struct sctp_stream_reset_tsn_request sr_req;
} SCTP_PACKED;
struct sctp_stream_reset_resp {
struct sctp_chunkhdr ch;
struct sctp_stream_reset_response sr_resp;
} SCTP_PACKED;
/* respone only valid with a TSN request */
struct sctp_stream_reset_resp_tsn {
struct sctp_chunkhdr ch;
struct sctp_stream_reset_response_tsn sr_resp;
} SCTP_PACKED;
/****************************************************/
/*
* Authenticated chunks support draft-ietf-tsvwg-sctp-auth
*/
/* Should we make the max be 32? */
#define SCTP_RANDOM_MAX_SIZE 256
struct sctp_auth_random {
struct sctp_paramhdr ph; /* type = 0x8002 */
uint8_t random_data[];
} SCTP_PACKED;
struct sctp_auth_chunk_list {
struct sctp_paramhdr ph; /* type = 0x8003 */
uint8_t chunk_types[];
} SCTP_PACKED;
struct sctp_auth_hmac_algo {
struct sctp_paramhdr ph; /* type = 0x8004 */
uint16_t hmac_ids[];
} SCTP_PACKED;
struct sctp_auth_chunk {
struct sctp_chunkhdr ch;
uint16_t shared_key_id;
uint16_t hmac_id;
uint8_t hmac[];
} SCTP_PACKED;
/*
* we pre-reserve enough room for a ECNE or CWR AND a SACK with no missing
* pieces. If ENCE is missing we could have a couple of blocks. This way we
* optimize so we MOST likely can bundle a SACK/ECN with the smallest size
* data chunk I will split into. We could increase throughput slightly by
* taking out these two but the 24-sack/8-CWR i.e. 32 bytes I pre-reserve I
* feel is worth it for now.
*/
#ifndef SCTP_MAX_OVERHEAD
#ifdef INET6
#define SCTP_MAX_OVERHEAD (sizeof(struct sctp_data_chunk) + \
sizeof(struct sctphdr) + \
sizeof(struct sctp_ecne_chunk) + \
sizeof(struct sctp_sack_chunk) + \
sizeof(struct ip6_hdr))
#define SCTP_MED_OVERHEAD (sizeof(struct sctp_data_chunk) + \
sizeof(struct sctphdr) + \
sizeof(struct ip6_hdr))
#define SCTP_MIN_OVERHEAD (sizeof(struct ip6_hdr) + \
sizeof(struct sctphdr))
#else
#define SCTP_MAX_OVERHEAD (sizeof(struct sctp_data_chunk) + \
sizeof(struct sctphdr) + \
sizeof(struct sctp_ecne_chunk) + \
sizeof(struct sctp_sack_chunk) + \
sizeof(struct ip))
#define SCTP_MED_OVERHEAD (sizeof(struct sctp_data_chunk) + \
sizeof(struct sctphdr) + \
sizeof(struct ip))
#define SCTP_MIN_OVERHEAD (sizeof(struct ip) + \
sizeof(struct sctphdr))
#endif /* INET6 */
#endif /* !SCTP_MAX_OVERHEAD */
#define SCTP_MED_V4_OVERHEAD (sizeof(struct sctp_data_chunk) + \
sizeof(struct sctphdr) + \
sizeof(struct ip))
#define SCTP_MIN_V4_OVERHEAD (sizeof(struct ip) + \
sizeof(struct sctphdr))
#undef SCTP_PACKED
#endif /* !__sctp_header_h__ */
