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- /*-
- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
- *
- * Copyright (c) 2019 Tom Jones <thj@freebsd.org>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. 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.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
- *
- * $FreeBSD$
- */
- #ifndef _NETINET_DCCP_H_
- #define _NETINET_DCCP_H_
- /* DCCP protocol header as per RFC4340 */
- struct dccphdr {
- uint16_t d_sport;
- uint16_t d_dport;
- uint8_t d_doff;
- #if BYTE_ORDER == LITTLE_ENDIAN
- uint8_t d_cscov:4,
- d_ccval:4;
- #endif
- #if BYTE_ORDER == BIG_ENDIAN
- uint8_t d_ccval:4,
- d_cscov:4;
- #endif
- uint8_t d_cksum[2];
- #if BYTE_ORDER == LITTLE_ENDIAN
- uint8_t d_res:3,
- d_type:4,
- d_x:1;
- #endif
- #if BYTE_ORDER == BIG_ENDIAN
- uint8_t d_x:1,
- d_type:4,
- d_res:3;
- #endif
- /*
- * Provide enough space for both the short (24 bit) sequence number and
- * the long (48 bit) sequene number and a leading reserved byte in
- * front of the long sequence number.
- */
- union dccp_seqno {
- uint8_t shortseq[3];
- struct dccp_long_seqno {
- uint8_t res;
- uint8_t seq[6];
- } longseq;
- } d_seqno;
- };
- #define d_seqno_short d_seqno.shortseq;
- #define d_seqno_long d_seqno.longseq.seq;
- #define DCCP_SHORTHDR 12
- #define DCCP_LONGHDR 16
- #define DCCP_EXTHDR 0x80
- #endif /* _NETINET_DCCP_H */
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