WebSVN – HelenOS – Blame – /branches/network/uspace/srv/net/nil/eth/eth_header.h

Rev	Author	Line No.	Line
3992	mejdrech	1	/*
		2	* Copyright (c) 2009 Lukas Mejdrech
		3	* All rights reserved.
		4	*
		5	* Redistribution and use in source and binary forms, with or without
		6	* modification, are permitted provided that the following conditions
		7	* are met:
		8	*
		9	* - Redistributions of source code must retain the above copyright
		10	* notice, this list of conditions and the following disclaimer.
		11	* - Redistributions in binary form must reproduce the above copyright
		12	* notice, this list of conditions and the following disclaimer in the
		13	* documentation and/or other materials provided with the distribution.
		14	* - The name of the author may not be used to endorse or promote products
		15	* derived from this software without specific prior written permission.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
		18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
		19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
		20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
		21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
		22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
		23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
		24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
		25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
		26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
		27	*/
		28
		29	/** @addtogroup eth
		30	* @{
		31	*/
		32
		33	/** @file
		34	* Ethernet protocol header definitions.
		35	* Names according to the linux src/include/linux/ip.h header file.
		36	*/
		37
		38	#ifndef __NET_ETH_HEADER_H__
		39	#define __NET_ETH_HEADER_H__
		40
		41	#include <sys/types.h>
		42
		43	#define ETH_ADDR 6
		44
		45	#define ETH_PREAMBLE 0x55
		46
4075	mejdrech	47	#define ETH_SFD 0xD5
3992	mejdrech	48
		49	/** Type definition of the Ethernet header with all the extensions.
		50	* @see eth_header_ex
		51	*/
		52	typedef struct eth_header_ex eth_header_ex_t;
		53
		54	/** Type definition of the Ethernet header with all the extensions pointer.
		55	* @see eth_header
		56	*/
		57	typedef eth_header_ex_t * eth_header_ex_ref;
		58
		59	/** Type definition of the Ethernet header LSAP extension.
		60	* @see eth_header_lsap
		61	*/
		62	typedef struct eth_header_lsap eth_header_lsap_t;
		63
		64	/** Type definition of the Ethernet header LSAP extension pointer.
		65	* @see eth_header_lsap
		66	*/
		67	typedef eth_header_lsap_t * eth_header_lsap_ref;
		68
		69	/** Type definition of the Ethernet header SNAP extension.
		70	* @see eth_header_snap
		71	*/
		72	typedef struct eth_header_snap eth_header_snap_t;
		73
		74	/** Type definition of the Ethernet header SNAP extension pointer.
		75	* @see eth_header_snap
		76	*/
		77	typedef eth_header_snap_t * eth_header_snap_ref;
		78
		79	/** Type definition of the Ethernet header.
		80	* @see eth_header
		81	*/
		82	typedef struct eth_header eth_header_t;
		83
		84	/** Type definition of the Ethernet header pointer.
		85	* @see eth_header
		86	*/
		87	typedef eth_header_t * eth_header_ref;
		88
		89	/** Ethernet header Link Service Access Point extension.
		90	*/
		91	struct eth_header_lsap{
		92	/** Destination Service Access Point identifier.
		93	* The possible values are assigned by an IEEE committee.
		94	*/
		95	uint8_t dsap;
		96	/** Source Service Access Point identifier.
		97	* The possible values are assigned by an IEEE committee.
		98	*/
		99	uint8_t ssap;
		100	/** Control parameter.
		101	* The possible values are assigned by an IEEE committee.
		102	*/
		103	uint8_t ctrl;
		104	};
		105
		106	/** Ethernet header SNAP extension.
		107	*/
		108	struct eth_header_snap{
		109	/** Protocol identifier or organization code.
		110	*/
		111	uint8_t proto[ 3 ];
		112	/** Ethernet protocol identifier in the network byte order (big endian).
		113	* @see ethernet_protocols.h
		114	*/
		115	uint16_t ethertype;
		116	};
		117
		118	/** Ethernet header.
		119	*/
		120	struct eth_header{
		121	/** Controlling preamble used for the frame transmission synchronization.
		122	* All should be set to ETH_PREAMBLE.
		123	*/
		124	uint8_t preamble[ 7 ];
		125	/** Start of Frame Delimiter used for the frame transmission synchronization.
		126	* Should be set to ETH_SFD.
		127	*/
		128	uint8_t sfd;
		129	/** Destination host Ethernet address (MAC address).
		130	*/
		131	uint8_t dest[ ETH_ADDR ];
		132	/** Source host Ethernet address (MAC address).
		133	*/
		134	uint8_t src[ ETH_ADDR ];
		135	/** Ethernet protocol identifier in the network byte order (big endian).
		136	* @see ethernet_protocols.h
		137	*/
		138	uint16_t ethertype;
		139	};
		140
		141	/** Ethernet header with all the extensions.
		142	*/
		143	struct eth_header_ex{
		144	/** Ethernet header.
		145	*/
		146	eth_header_t header;
		147	/** LSAP extension.
		148	* If DSAP and SSAP are set to ETH_LSAP_SNAP the SNAP extension is being used.
		149	* If DSAP and SSAP fields are equal to ETH_RAW the raw Ethernet packet without any extensions is being used and the frame content starts rigth after the two fields.
		150	*/
		151	eth_header_lsap_t lsap;
		152	/** SNAP extension.
		153	*/
		154	eth_header_snap_t snap;
		155	};
		156
4075	mejdrech	157	/** Ethernet Frame Check Sequence.
		158	*/
		159	typedef uint32_t eth_fcs_t;
		160
		161	/** Ethernet Frame Check Sequence pointer.
		162	*/
		163	typedef eth_fcs_t * eth_fcs_ref;
		164
3992	mejdrech	165	#endif
		166
		167	/** @}
		168	*/

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