| Andrea Falcone | 1c4977f | 2020-07-23 10:58:25 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 The Android Open Source Project |
| 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 | * * Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * * Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in |
| 12 | * the documentation and/or other materials provided with the |
| 13 | * distribution. |
| 14 | * |
| 15 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 16 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 17 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| 18 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| 19 | * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 20 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| 21 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| 22 | * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| 23 | * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| 24 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| 25 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 26 | * SUCH DAMAGE. |
| 27 | */ |
| 28 | |
| 29 | #ifndef _NET_ETHERNET_H_ |
| 30 | #define _NET_ETHERNET_H_ |
| 31 | |
| 32 | #include <sys/cdefs.h> |
| 33 | #include <sys/types.h> |
| 34 | |
| 35 | #include <linux/if_ether.h> |
| 36 | |
| 37 | #define ETHERTYPE_IP 0x0800 |
| 38 | #define ETHERTYPE_ARP 0x0806 |
| 39 | #define ETHERTYPE_REVARP 0x8035 |
| 40 | #define ETHERTYPE_VLAN 0x8100 |
| 41 | #define ETHERTYPE_IPX 0x8137 |
| 42 | #define ETHERTYPE_IPV6 0x86dd |
| 43 | #define ETHERTYPE_LOOPBACK 0x9000 |
| 44 | |
| 45 | #define ETHERTYPE_TRAIL 0x1000 |
| 46 | #define ETHERTYPE_NTRAILER 16 |
| 47 | |
| 48 | /* |
| 49 | * Some basic Ethernet constants. |
| 50 | */ |
| 51 | #define ETHER_ADDR_LEN 6 /* length of an Ethernet address */ |
| 52 | #define ETHER_TYPE_LEN 2 /* length of the Ethernet type field */ |
| 53 | #define ETHER_CRC_LEN 4 /* length of the Ethernet CRC */ |
| 54 | #define ETHER_HDR_LEN ((ETHER_ADDR_LEN * 2) + ETHER_TYPE_LEN) |
| 55 | #define ETHER_MIN_LEN 64 /* minimum frame length, including CRC */ |
| 56 | #define ETHER_MAX_LEN 1518 /* maximum frame length, including CRC */ |
| 57 | #define ETHER_MAX_LEN_JUMBO 9018 /* maximum jumbo frame len, including CRC */ |
| 58 | |
| 59 | /* |
| 60 | * Ethernet address - 6 octets |
| 61 | * this is only used by the ethers(3) functions. |
| 62 | */ |
| 63 | struct ether_addr { |
| 64 | u_int8_t ether_addr_octet[ETHER_ADDR_LEN]; |
| 65 | } __attribute__((__packed__)); |
| 66 | |
| 67 | /* |
| 68 | * Structure of a 10Mb/s Ethernet header. |
| 69 | */ |
| 70 | struct ether_header { |
| 71 | u_int8_t ether_dhost[ETHER_ADDR_LEN]; |
| 72 | u_int8_t ether_shost[ETHER_ADDR_LEN]; |
| 73 | u_int16_t ether_type; |
| 74 | } __attribute__((__packed__)); |
| 75 | |
| 76 | #define ETHERMTU_JUMBO (ETHER_MAX_LEN_JUMBO - ETHER_HDR_LEN - ETHER_CRC_LEN) |
| 77 | #define ETHERMTU (ETHER_MAX_LEN - ETHER_HDR_LEN - ETHER_CRC_LEN) |
| 78 | #define ETHERMIN (ETHER_MIN_LEN - ETHER_HDR_LEN - ETHER_CRC_LEN) |
| 79 | |
| 80 | #endif |
