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| Rev | Author | Line No. | Line |
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| 3992 | mejdrech | 1 | /* |
| 2 | * Copyright (c) 2009 Lukas Mejdrech |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 29 | /** @addtogroup eth |
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| 30 | * @{ |
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| 31 | */ |
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| 32 | |||
| 33 | /** @file |
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| 34 | * Ethernet protocol header definitions. |
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| 35 | * Names according to the linux src/include/linux/ip.h header file. |
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| 36 | */ |
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| 37 | |||
| 38 | #ifndef __NET_ETH_HEADER_H__ |
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| 39 | #define __NET_ETH_HEADER_H__ |
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| 40 | |||
| 41 | #include <sys/types.h> |
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| 42 | |||
| 43 | #define ETH_ADDR 6 |
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| 44 | |||
| 45 | #define ETH_PREAMBLE 0x55 |
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| 46 | |||
| 4075 | mejdrech | 47 | #define ETH_SFD 0xD5 |
| 3992 | mejdrech | 48 | |
| 49 | /** Type definition of the Ethernet header with all the extensions. |
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| 50 | * @see eth_header_ex |
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| 51 | */ |
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| 52 | typedef struct eth_header_ex eth_header_ex_t; |
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| 53 | |||
| 54 | /** Type definition of the Ethernet header with all the extensions pointer. |
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| 55 | * @see eth_header |
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| 56 | */ |
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| 57 | typedef eth_header_ex_t * eth_header_ex_ref; |
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| 58 | |||
| 59 | /** Type definition of the Ethernet header LSAP extension. |
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| 60 | * @see eth_header_lsap |
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| 61 | */ |
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| 62 | typedef struct eth_header_lsap eth_header_lsap_t; |
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| 63 | |||
| 64 | /** Type definition of the Ethernet header LSAP extension pointer. |
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| 65 | * @see eth_header_lsap |
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| 66 | */ |
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| 67 | typedef eth_header_lsap_t * eth_header_lsap_ref; |
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| 68 | |||
| 69 | /** Type definition of the Ethernet header SNAP extension. |
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| 70 | * @see eth_header_snap |
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| 71 | */ |
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| 72 | typedef struct eth_header_snap eth_header_snap_t; |
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| 73 | |||
| 74 | /** Type definition of the Ethernet header SNAP extension pointer. |
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| 75 | * @see eth_header_snap |
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| 76 | */ |
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| 77 | typedef eth_header_snap_t * eth_header_snap_ref; |
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| 78 | |||
| 4153 | mejdrech | 79 | /** Type definition of the Ethernet header preamble. |
| 80 | * @see preamble |
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| 81 | */ |
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| 82 | typedef struct eth_preamble eth_preamble_t; |
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| 83 | |||
| 84 | /** Type definition of the Ethernet header preamble pointer. |
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| 85 | * @see eth_preamble |
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| 86 | */ |
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| 87 | typedef eth_preamble_t * eth_preamble_ref; |
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| 88 | |||
| 3992 | mejdrech | 89 | /** Type definition of the Ethernet header. |
| 90 | * @see eth_header |
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| 91 | */ |
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| 92 | typedef struct eth_header eth_header_t; |
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| 93 | |||
| 94 | /** Type definition of the Ethernet header pointer. |
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| 95 | * @see eth_header |
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| 96 | */ |
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| 97 | typedef eth_header_t * eth_header_ref; |
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| 98 | |||
| 99 | /** Ethernet header Link Service Access Point extension. |
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| 100 | */ |
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| 101 | struct eth_header_lsap{ |
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| 102 | /** Destination Service Access Point identifier. |
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| 103 | * The possible values are assigned by an IEEE committee. |
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| 104 | */ |
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| 105 | uint8_t dsap; |
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| 106 | /** Source Service Access Point identifier. |
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| 107 | * The possible values are assigned by an IEEE committee. |
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| 108 | */ |
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| 109 | uint8_t ssap; |
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| 110 | /** Control parameter. |
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| 111 | * The possible values are assigned by an IEEE committee. |
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| 112 | */ |
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| 113 | uint8_t ctrl; |
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| 114 | }; |
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| 115 | |||
| 116 | /** Ethernet header SNAP extension. |
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| 117 | */ |
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| 118 | struct eth_header_snap{ |
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| 119 | /** Protocol identifier or organization code. |
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| 120 | */ |
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| 121 | uint8_t proto[ 3 ]; |
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| 122 | /** Ethernet protocol identifier in the network byte order (big endian). |
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| 123 | * @see ethernet_protocols.h |
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| 124 | */ |
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| 125 | uint16_t ethertype; |
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| 126 | }; |
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| 127 | |||
| 4153 | mejdrech | 128 | /** Ethernet header preamble. |
| 129 | * Used for dummy devices. |
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| 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. |
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| 134 | */ |
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| 135 | uint8_t preamble[ 7 ]; |
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| 136 | /** Start of Frame Delimiter used for the frame transmission synchronization. |
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| 137 | * Should be set to ETH_SFD. |
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| 138 | */ |
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| 139 | uint8_t sfd; |
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| 4153 | mejdrech | 140 | }; |
| 141 | |||
| 142 | /** Ethernet header. |
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| 143 | */ |
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| 144 | struct eth_header{ |
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| 3992 | mejdrech | 145 | /** Destination host Ethernet address (MAC address). |
| 146 | */ |
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| 147 | uint8_t dest[ ETH_ADDR ]; |
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| 148 | /** Source host Ethernet address (MAC address). |
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| 149 | */ |
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| 150 | uint8_t src[ ETH_ADDR ]; |
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| 151 | /** Ethernet protocol identifier in the network byte order (big endian). |
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| 152 | * @see ethernet_protocols.h |
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| 153 | */ |
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| 154 | uint16_t ethertype; |
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| 155 | }; |
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| 156 | |||
| 157 | /** Ethernet header with all the extensions. |
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| 158 | */ |
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| 159 | struct eth_header_ex{ |
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| 160 | /** Ethernet header. |
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| 161 | */ |
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| 162 | eth_header_t header; |
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| 163 | /** LSAP extension. |
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| 164 | * If DSAP and SSAP are set to ETH_LSAP_SNAP the SNAP extension is being used. |
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| 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. |
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| 166 | */ |
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| 167 | eth_header_lsap_t lsap; |
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| 168 | /** SNAP extension. |
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| 169 | */ |
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| 170 | eth_header_snap_t snap; |
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| 171 | }; |
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| 172 | |||
| 4075 | mejdrech | 173 | /** Ethernet Frame Check Sequence. |
| 174 | */ |
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| 175 | typedef uint32_t eth_fcs_t; |
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| 176 | |||
| 177 | /** Ethernet Frame Check Sequence pointer. |
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| 178 | */ |
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| 179 | typedef eth_fcs_t * eth_fcs_ref; |
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| 180 | |||
| 3992 | mejdrech | 181 | #endif |
| 182 | |||
| 183 | /** @} |
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| 184 | */ |