[457] | 1 | /**
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| 2 | * @file
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| 3 | * Ethernet protocol definitions
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
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| 8 | * All rights reserved.
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| 9 | *
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| 10 | * Redistribution and use in source and binary forms, with or without modification,
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| 11 | * are permitted provided that the following conditions are met:
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| 12 | *
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| 13 | * 1. Redistributions of source code must retain the above copyright notice,
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| 14 | * this list of conditions and the following disclaimer.
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| 15 | * 2. Redistributions in binary form must reproduce the above copyright notice,
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| 16 | * this list of conditions and the following disclaimer in the documentation
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| 17 | * and/or other materials provided with the distribution.
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| 18 | * 3. The name of the author may not be used to endorse or promote products
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| 19 | * derived from this software without specific prior written permission.
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| 20 | *
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| 21 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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| 22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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| 23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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| 24 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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| 25 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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| 26 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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| 27 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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| 28 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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| 29 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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| 30 | * OF SUCH DAMAGE.
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| 31 | *
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| 32 | * This file is part of the lwIP TCP/IP stack.
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| 33 | *
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| 34 | * Author: Adam Dunkels <adam@sics.se>
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| 35 | *
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| 36 | */
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| 37 | #ifndef LWIP_HDR_PROT_ETHERNET_H
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| 38 | #define LWIP_HDR_PROT_ETHERNET_H
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| 39 |
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| 40 | #include "lwip/arch.h"
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| 41 | #include "lwip/prot/ieee.h"
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| 42 |
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| 43 | #ifdef __cplusplus
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| 44 | extern "C" {
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| 45 | #endif
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| 46 |
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| 47 | #ifndef ETH_HWADDR_LEN
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| 48 | #ifdef ETHARP_HWADDR_LEN
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| 49 | #define ETH_HWADDR_LEN ETHARP_HWADDR_LEN /* compatibility mode */
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| 50 | #else
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| 51 | #define ETH_HWADDR_LEN 6
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| 52 | #endif
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| 53 | #endif
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| 54 |
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| 55 | #ifdef PACK_STRUCT_USE_INCLUDES
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| 56 | # include "arch/bpstruct.h"
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| 57 | #endif
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| 58 | PACK_STRUCT_BEGIN
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| 59 | /** An Ethernet MAC address */
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| 60 | struct eth_addr {
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| 61 | PACK_STRUCT_FLD_8(u8_t addr[ETH_HWADDR_LEN]);
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| 62 | } PACK_STRUCT_STRUCT;
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| 63 | PACK_STRUCT_END
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| 64 | #ifdef PACK_STRUCT_USE_INCLUDES
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| 65 | # include "arch/epstruct.h"
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| 66 | #endif
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| 67 |
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| 68 | /** Initialize a struct eth_addr with its 6 bytes (takes care of correct braces) */
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| 69 | #define ETH_ADDR(b0, b1, b2, b3, b4, b5) {{b0, b1, b2, b3, b4, b5}}
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| 70 |
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| 71 | #ifdef PACK_STRUCT_USE_INCLUDES
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| 72 | # include "arch/bpstruct.h"
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| 73 | #endif
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| 74 | PACK_STRUCT_BEGIN
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| 75 | /** Ethernet header */
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| 76 | struct eth_hdr {
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| 77 | #if ETH_PAD_SIZE
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| 78 | PACK_STRUCT_FLD_8(u8_t padding[ETH_PAD_SIZE]);
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| 79 | #endif
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| 80 | PACK_STRUCT_FLD_S(struct eth_addr dest);
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| 81 | PACK_STRUCT_FLD_S(struct eth_addr src);
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| 82 | PACK_STRUCT_FIELD(u16_t type);
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| 83 | } PACK_STRUCT_STRUCT;
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| 84 | PACK_STRUCT_END
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| 85 | #ifdef PACK_STRUCT_USE_INCLUDES
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| 86 | # include "arch/epstruct.h"
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| 87 | #endif
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| 88 |
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| 89 | #define SIZEOF_ETH_HDR (14 + ETH_PAD_SIZE)
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| 90 |
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| 91 | #ifdef PACK_STRUCT_USE_INCLUDES
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| 92 | # include "arch/bpstruct.h"
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| 93 | #endif
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| 94 | PACK_STRUCT_BEGIN
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| 95 | /** VLAN header inserted between ethernet header and payload
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| 96 | * if 'type' in ethernet header is ETHTYPE_VLAN.
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| 97 | * See IEEE802.Q */
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| 98 | struct eth_vlan_hdr {
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| 99 | PACK_STRUCT_FIELD(u16_t prio_vid);
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| 100 | PACK_STRUCT_FIELD(u16_t tpid);
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| 101 | } PACK_STRUCT_STRUCT;
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| 102 | PACK_STRUCT_END
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| 103 | #ifdef PACK_STRUCT_USE_INCLUDES
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| 104 | # include "arch/epstruct.h"
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| 105 | #endif
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| 106 |
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| 107 | #define SIZEOF_VLAN_HDR 4
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| 108 | #define VLAN_ID(vlan_hdr) (lwip_htons((vlan_hdr)->prio_vid) & 0xFFF)
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| 109 |
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| 110 | /** The 24-bit IANA IPv4-multicast OUI is 01-00-5e: */
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| 111 | #define LL_IP4_MULTICAST_ADDR_0 0x01
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| 112 | #define LL_IP4_MULTICAST_ADDR_1 0x00
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| 113 | #define LL_IP4_MULTICAST_ADDR_2 0x5e
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| 114 |
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| 115 | /** IPv6 multicast uses this prefix */
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| 116 | #define LL_IP6_MULTICAST_ADDR_0 0x33
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| 117 | #define LL_IP6_MULTICAST_ADDR_1 0x33
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| 118 |
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| 119 | #define eth_addr_cmp(addr1, addr2) (memcmp((addr1)->addr, (addr2)->addr, ETH_HWADDR_LEN) == 0)
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| 120 |
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| 121 | #ifdef __cplusplus
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| 122 | }
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| 123 | #endif
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| 124 |
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| 125 | #endif /* LWIP_HDR_PROT_ETHERNET_H */
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