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
4153	mejdrech	79	/** Type definition of the Ethernet header preamble.
		80	* @see preamble
		81	*/
		82	typedef struct eth_preamble eth_preamble_t;
		83
		84	/** Type definition of the Ethernet header preamble pointer.
		85	* @see eth_preamble
		86	*/
		87	typedef eth_preamble_t * eth_preamble_ref;
		88
3992	mejdrech	89	/** Type definition of the Ethernet header.
		90	* @see eth_header
		91	*/
		92	typedef struct eth_header eth_header_t;
		93
		94	/** Type definition of the Ethernet header pointer.
		95	* @see eth_header
		96	*/
		97	typedef eth_header_t * eth_header_ref;
		98
		99	/** Ethernet header Link Service Access Point extension.
		100	*/
		101	struct eth_header_lsap{
		102	/** Destination Service Access Point identifier.
		103	* The possible values are assigned by an IEEE committee.
		104	*/
		105	uint8_t dsap;
		106	/** Source Service Access Point identifier.
		107	* The possible values are assigned by an IEEE committee.
		108	*/
		109	uint8_t ssap;
		110	/** Control parameter.
		111	* The possible values are assigned by an IEEE committee.
		112	*/
		113	uint8_t ctrl;
4243	mejdrech	114	} __attribute__ ((packed));
3992	mejdrech	115
		116	/** Ethernet header SNAP extension.
		117	*/
		118	struct eth_header_snap{
		119	/** Protocol identifier or organization code.
		120	*/
		121	uint8_t proto[ 3 ];
		122	/** Ethernet protocol identifier in the network byte order (big endian).
		123	* @see ethernet_protocols.h
		124	*/
		125	uint16_t ethertype;
4243	mejdrech	126	} __attribute__ ((packed));
3992	mejdrech	127
4153	mejdrech	128	/** Ethernet header preamble.
		129	* Used for dummy devices.
3992	mejdrech	130	*/
4153	mejdrech	131	struct eth_preamble{
3992	mejdrech	132	/** Controlling preamble used for the frame transmission synchronization.
		133	* All should be set to ETH_PREAMBLE.
		134	*/
		135	uint8_t preamble[ 7 ];
		136	/** Start of Frame Delimiter used for the frame transmission synchronization.
		137	* Should be set to ETH_SFD.
		138	*/
		139	uint8_t sfd;
4243	mejdrech	140	} __attribute__ ((packed));
4153	mejdrech	141
		142	/** Ethernet header.
		143	*/
		144	struct eth_header{
3992	mejdrech	145	/** Destination host Ethernet address (MAC address).
		146	*/
		147	uint8_t dest[ ETH_ADDR ];
		148	/** Source host Ethernet address (MAC address).
		149	*/
		150	uint8_t src[ ETH_ADDR ];
		151	/** Ethernet protocol identifier in the network byte order (big endian).
		152	* @see ethernet_protocols.h
		153	*/
		154	uint16_t ethertype;
4243	mejdrech	155	} __attribute__ ((packed));
3992	mejdrech	156
		157	/** Ethernet header with all the extensions.
		158	*/
		159	struct eth_header_ex{
		160	/** Ethernet header.
		161	*/
		162	eth_header_t header;
		163	/** LSAP extension.
		164	* If DSAP and SSAP are set to ETH_LSAP_SNAP the SNAP extension is being used.
		165	* 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.
		166	*/
		167	eth_header_lsap_t lsap;
		168	/** SNAP extension.
		169	*/
		170	eth_header_snap_t snap;
4243	mejdrech	171	} __attribute__ ((packed));
3992	mejdrech	172
4075	mejdrech	173	/** Ethernet Frame Check Sequence.
		174	*/
		175	typedef uint32_t eth_fcs_t;
		176
		177	/** Ethernet Frame Check Sequence pointer.
		178	*/
		179	typedef eth_fcs_t * eth_fcs_ref;
		180
3992	mejdrech	181	#endif
		182
		183	/** @}
		184	*/

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