Author: thj Date: Wed Jun 17 13:27:13 2020 New Revision: 362275 URL: https://svnweb.freebsd.org/changeset/base/362275
Log: Add header definition for RFC4340, Datagram Congestion Control Protocol Add a header definition for DCCP as defined in RFC4340. This header definition is required to perform validation when receiving and forwarding DCCP packets. We do not currently support DCCP. Reviewed by: gallatin, bz Approved by: bz (co-mentor) MFC after: 1 week MFC with: 350749 Differential Revision: https://reviews.freebsd.org/D21179 Added: head/sys/netinet/dccp.h (contents, props changed) Added: head/sys/netinet/dccp.h ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sys/netinet/dccp.h Wed Jun 17 13:27:13 2020 (r362275) @@ -0,0 +1,78 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause-FreeBSD + * + * Copyright (c) 2019 Tom Jones <t...@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 */ _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
