1d88fe3d9STom Jones /*- 24d846d26SWarner Losh * SPDX-License-Identifier: BSD-2-Clause 3d88fe3d9STom Jones * 4d88fe3d9STom Jones * Copyright (c) 2019 Tom Jones <thj@freebsd.org> 5d88fe3d9STom Jones * 6d88fe3d9STom Jones * Redistribution and use in source and binary forms, with or without 7d88fe3d9STom Jones * modification, are permitted provided that the following conditions 8d88fe3d9STom Jones * are met: 9d88fe3d9STom Jones * 1. Redistributions of source code must retain the above copyright 10d88fe3d9STom Jones * notice, this list of conditions and the following disclaimer. 11d88fe3d9STom Jones * 2. Redistributions in binary form must reproduce the above copyright 12d88fe3d9STom Jones * notice, this list of conditions and the following disclaimer in the 13d88fe3d9STom Jones * documentation and/or other materials provided with the distribution. 14d88fe3d9STom Jones * 15d88fe3d9STom Jones * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16d88fe3d9STom Jones * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17d88fe3d9STom Jones * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18d88fe3d9STom Jones * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19d88fe3d9STom Jones * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20d88fe3d9STom Jones * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21d88fe3d9STom Jones * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22d88fe3d9STom Jones * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23d88fe3d9STom Jones * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24d88fe3d9STom Jones * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25d88fe3d9STom Jones * SUCH DAMAGE. 26d88fe3d9STom Jones */ 27d88fe3d9STom Jones 28d88fe3d9STom Jones #ifndef _NETINET_DCCP_H_ 29d88fe3d9STom Jones #define _NETINET_DCCP_H_ 30d88fe3d9STom Jones 31d88fe3d9STom Jones /* DCCP protocol header as per RFC4340 */ 32d88fe3d9STom Jones struct dccphdr { 33d88fe3d9STom Jones uint16_t d_sport; 34d88fe3d9STom Jones uint16_t d_dport; 35d88fe3d9STom Jones uint8_t d_doff; 36d88fe3d9STom Jones #if BYTE_ORDER == LITTLE_ENDIAN 37d88fe3d9STom Jones uint8_t d_cscov:4, 38d88fe3d9STom Jones d_ccval:4; 39d88fe3d9STom Jones #endif 40d88fe3d9STom Jones #if BYTE_ORDER == BIG_ENDIAN 41d88fe3d9STom Jones uint8_t d_ccval:4, 42d88fe3d9STom Jones d_cscov:4; 43d88fe3d9STom Jones #endif 44d88fe3d9STom Jones uint8_t d_cksum[2]; 45d88fe3d9STom Jones #if BYTE_ORDER == LITTLE_ENDIAN 46d88fe3d9STom Jones uint8_t d_res:3, 47d88fe3d9STom Jones d_type:4, 48d88fe3d9STom Jones d_x:1; 49d88fe3d9STom Jones #endif 50d88fe3d9STom Jones #if BYTE_ORDER == BIG_ENDIAN 51d88fe3d9STom Jones uint8_t d_x:1, 52d88fe3d9STom Jones d_type:4, 53d88fe3d9STom Jones d_res:3; 54d88fe3d9STom Jones #endif 55d88fe3d9STom Jones /* 56d88fe3d9STom Jones * Provide enough space for both the short (24 bit) sequence number and 57d88fe3d9STom Jones * the long (48 bit) sequene number and a leading reserved byte in 58d88fe3d9STom Jones * front of the long sequence number. 59d88fe3d9STom Jones */ 60d88fe3d9STom Jones union dccp_seqno { 61d88fe3d9STom Jones uint8_t shortseq[3]; 62d88fe3d9STom Jones struct dccp_long_seqno { 63d88fe3d9STom Jones uint8_t res; 64d88fe3d9STom Jones uint8_t seq[6]; 65d88fe3d9STom Jones } longseq; 66d88fe3d9STom Jones } d_seqno; 67d88fe3d9STom Jones }; 68d88fe3d9STom Jones 69d88fe3d9STom Jones #define d_seqno_short d_seqno.shortseq; 70d88fe3d9STom Jones #define d_seqno_long d_seqno.longseq.seq; 71d88fe3d9STom Jones 72d88fe3d9STom Jones #define DCCP_SHORTHDR 12 73d88fe3d9STom Jones #define DCCP_LONGHDR 16 74d88fe3d9STom Jones #define DCCP_EXTHDR 0x80 75d88fe3d9STom Jones 76d88fe3d9STom Jones #endif /* _NETINET_DCCP_H */ 77