[164] | 1 | /*
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| 2 | * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
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| 3 | * Copyright (c) 2003-2004 Leon Woestenberg <leon.woestenberg@axon.tv>
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| 4 | * Copyright (c) 2003-2004 Axon Digital Design B.V., The Netherlands.
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| 5 | * All rights reserved.
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| 6 | *
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| 7 | * Redistribution and use in source and binary forms, with or without modification,
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| 8 | * are permitted provided that the following conditions are met:
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| 9 | *
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| 10 | * 1. Redistributions of source code must retain the above copyright notice,
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| 11 | * this list of conditions and the following disclaimer.
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| 12 | * 2. Redistributions in binary form must reproduce the above copyright notice,
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| 13 | * this list of conditions and the following disclaimer in the documentation
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| 14 | * and/or other materials provided with the distribution.
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| 15 | * 3. The name of the author may not be used to endorse or promote products
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| 16 | * derived from this software without specific prior written permission.
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| 17 | *
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| 18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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| 19 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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| 20 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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| 21 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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| 22 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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| 23 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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| 24 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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| 25 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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| 26 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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| 27 | * OF SUCH DAMAGE.
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| 28 | *
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| 29 | * This file is part of the lwIP TCP/IP stack.
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| 30 | *
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| 31 | * Author: Adam Dunkels <adam@sics.se>
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| 32 | *
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| 33 | */
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| 34 |
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| 35 | #ifndef __NETIF_ETHARP_H__
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| 36 | #define __NETIF_ETHARP_H__
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| 37 |
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| 38 | #include "lwip/opt.h"
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| 39 |
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| 40 | #if LWIP_ARP || LWIP_ETHERNET /* don't build if not configured for use in lwipopts.h */
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| 41 |
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| 42 | #include "lwip/pbuf.h"
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| 43 | #include "lwip/ip_addr.h"
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| 44 | #include "lwip/netif.h"
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| 45 | #include "lwip/ip.h"
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| 46 |
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| 47 | #ifdef __cplusplus
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| 48 | extern "C" {
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| 49 | #endif
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| 50 |
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| 51 | #ifndef ETHARP_HWADDR_LEN
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| 52 | #define ETHARP_HWADDR_LEN 6
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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 | struct eth_addr {
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| 60 | PACK_STRUCT_FIELD(u8_t addr[ETHARP_HWADDR_LEN]);
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| 61 | } PACK_STRUCT_STRUCT;
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| 62 | PACK_STRUCT_END
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| 63 | #ifdef PACK_STRUCT_USE_INCLUDES
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| 64 | # include "arch/epstruct.h"
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| 65 | #endif
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| 66 |
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| 67 | #ifdef PACK_STRUCT_USE_INCLUDES
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| 68 | # include "arch/bpstruct.h"
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| 69 | #endif
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| 70 | PACK_STRUCT_BEGIN
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| 71 | /** Ethernet header */
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| 72 | struct eth_hdr {
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| 73 | #if ETH_PAD_SIZE
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| 74 | PACK_STRUCT_FIELD(u8_t padding[ETH_PAD_SIZE]);
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| 75 | #endif
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| 76 | PACK_STRUCT_FIELD(struct eth_addr dest);
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| 77 | PACK_STRUCT_FIELD(struct eth_addr src);
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| 78 | PACK_STRUCT_FIELD(u16_t type);
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| 79 | } PACK_STRUCT_STRUCT;
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| 80 | PACK_STRUCT_END
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| 81 | #ifdef PACK_STRUCT_USE_INCLUDES
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| 82 | # include "arch/epstruct.h"
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| 83 | #endif
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| 84 |
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| 85 | #define SIZEOF_ETH_HDR (14 + ETH_PAD_SIZE)
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| 86 |
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| 87 | #if ETHARP_SUPPORT_VLAN
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| 88 |
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| 89 | #ifdef PACK_STRUCT_USE_INCLUDES
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| 90 | # include "arch/bpstruct.h"
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| 91 | #endif
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| 92 | PACK_STRUCT_BEGIN
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| 93 | /** VLAN header inserted between ethernet header and payload
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| 94 | * if 'type' in ethernet header is ETHTYPE_VLAN.
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| 95 | * See IEEE802.Q */
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| 96 | struct eth_vlan_hdr {
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| 97 | PACK_STRUCT_FIELD(u16_t prio_vid);
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| 98 | PACK_STRUCT_FIELD(u16_t tpid);
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| 99 | } PACK_STRUCT_STRUCT;
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| 100 | PACK_STRUCT_END
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| 101 | #ifdef PACK_STRUCT_USE_INCLUDES
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| 102 | # include "arch/epstruct.h"
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| 103 | #endif
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| 104 |
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| 105 | #define SIZEOF_VLAN_HDR 4
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| 106 | #define VLAN_ID(vlan_hdr) (htons((vlan_hdr)->prio_vid) & 0xFFF)
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| 107 |
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| 108 | #endif /* ETHARP_SUPPORT_VLAN */
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| 109 |
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| 110 | #ifdef PACK_STRUCT_USE_INCLUDES
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| 111 | # include "arch/bpstruct.h"
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| 112 | #endif
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| 113 | PACK_STRUCT_BEGIN
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| 114 | /** the ARP message, see RFC 826 ("Packet format") */
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| 115 | struct etharp_hdr {
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| 116 | PACK_STRUCT_FIELD(u16_t hwtype);
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| 117 | PACK_STRUCT_FIELD(u16_t proto);
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| 118 | PACK_STRUCT_FIELD(u8_t hwlen);
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| 119 | PACK_STRUCT_FIELD(u8_t protolen);
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| 120 | PACK_STRUCT_FIELD(u16_t opcode);
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| 121 | PACK_STRUCT_FIELD(struct eth_addr shwaddr);
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| 122 | PACK_STRUCT_FIELD(struct ip_addr2 sipaddr);
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| 123 | PACK_STRUCT_FIELD(struct eth_addr dhwaddr);
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| 124 | PACK_STRUCT_FIELD(struct ip_addr2 dipaddr);
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| 125 | } PACK_STRUCT_STRUCT;
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| 126 | PACK_STRUCT_END
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| 127 | #ifdef PACK_STRUCT_USE_INCLUDES
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| 128 | # include "arch/epstruct.h"
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| 129 | #endif
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| 130 |
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| 131 | #define SIZEOF_ETHARP_HDR 28
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| 132 | #define SIZEOF_ETHARP_PACKET (SIZEOF_ETH_HDR + SIZEOF_ETHARP_HDR)
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| 133 |
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| 134 | /** 5 seconds period */
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| 135 | #define ARP_TMR_INTERVAL 5000
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| 136 |
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| 137 | #define ETHTYPE_ARP 0x0806U
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| 138 | #define ETHTYPE_IP 0x0800U
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| 139 | #define ETHTYPE_VLAN 0x8100U
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| 140 | #define ETHTYPE_PPPOEDISC 0x8863U /* PPP Over Ethernet Discovery Stage */
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| 141 | #define ETHTYPE_PPPOE 0x8864U /* PPP Over Ethernet Session Stage */
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| 142 |
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| 143 | /** MEMCPY-like macro to copy to/from struct eth_addr's that are local variables
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| 144 | * or known to be 32-bit aligned within the protocol header. */
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| 145 | #ifndef ETHADDR32_COPY
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| 146 | #define ETHADDR32_COPY(src, dst) SMEMCPY(src, dst, ETHARP_HWADDR_LEN)
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| 147 | #endif
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| 148 |
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| 149 | /** MEMCPY-like macro to copy to/from struct eth_addr's that are no local
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| 150 | * variables and known to be 16-bit aligned within the protocol header. */
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| 151 | #ifndef ETHADDR16_COPY
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| 152 | #define ETHADDR16_COPY(src, dst) SMEMCPY(src, dst, ETHARP_HWADDR_LEN)
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| 153 | #endif
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| 154 |
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| 155 | #if LWIP_ARP /* don't build if not configured for use in lwipopts.h */
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| 156 |
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| 157 | /** ARP message types (opcodes) */
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| 158 | #define ARP_REQUEST 1
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| 159 | #define ARP_REPLY 2
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| 160 |
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| 161 | /** Define this to 1 and define LWIP_ARP_FILTER_NETIF_FN(pbuf, netif, type)
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| 162 | * to a filter function that returns the correct netif when using multiple
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| 163 | * netifs on one hardware interface where the netif's low-level receive
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| 164 | * routine cannot decide for the correct netif (e.g. when mapping multiple
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| 165 | * IP addresses to one hardware interface).
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| 166 | */
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| 167 | #ifndef LWIP_ARP_FILTER_NETIF
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| 168 | #define LWIP_ARP_FILTER_NETIF 0
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| 169 | #endif
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| 170 |
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| 171 | #if ARP_QUEUEING
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| 172 | /** struct for queueing outgoing packets for unknown address
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| 173 | * defined here to be accessed by memp.h
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| 174 | */
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| 175 | struct etharp_q_entry {
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| 176 | struct etharp_q_entry *next;
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| 177 | struct pbuf *p;
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| 178 | };
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| 179 | #endif /* ARP_QUEUEING */
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| 180 |
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| 181 | #define etharp_init() /* Compatibility define, not init needed. */
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| 182 | void etharp_tmr(void);
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| 183 | s8_t etharp_find_addr(struct netif *netif, ip_addr_t *ipaddr,
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| 184 | struct eth_addr **eth_ret, ip_addr_t **ip_ret);
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| 185 | err_t etharp_output(struct netif *netif, struct pbuf *q, ip_addr_t *ipaddr);
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| 186 | err_t etharp_query(struct netif *netif, ip_addr_t *ipaddr, struct pbuf *q);
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| 187 | err_t etharp_request(struct netif *netif, ip_addr_t *ipaddr);
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| 188 | /** For Ethernet network interfaces, we might want to send "gratuitous ARP";
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| 189 | * this is an ARP packet sent by a node in order to spontaneously cause other
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| 190 | * nodes to update an entry in their ARP cache.
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| 191 | * From RFC 3220 "IP Mobility Support for IPv4" section 4.6. */
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| 192 | #define etharp_gratuitous(netif) etharp_request((netif), &(netif)->ip_addr)
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| 193 | void etharp_cleanup_netif(struct netif *netif);
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| 194 |
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| 195 | #if ETHARP_SUPPORT_STATIC_ENTRIES
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| 196 | err_t etharp_add_static_entry(ip_addr_t *ipaddr, struct eth_addr *ethaddr);
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| 197 | err_t etharp_remove_static_entry(ip_addr_t *ipaddr);
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| 198 | #endif /* ETHARP_SUPPORT_STATIC_ENTRIES */
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| 199 |
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| 200 | #if LWIP_AUTOIP
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| 201 | err_t etharp_raw(struct netif *netif, const struct eth_addr *ethsrc_addr,
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| 202 | const struct eth_addr *ethdst_addr,
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| 203 | const struct eth_addr *hwsrc_addr, const ip_addr_t *ipsrc_addr,
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| 204 | const struct eth_addr *hwdst_addr, const ip_addr_t *ipdst_addr,
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| 205 | const u16_t opcode);
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| 206 | #endif /* LWIP_AUTOIP */
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| 207 |
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| 208 | #endif /* LWIP_ARP */
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| 209 |
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| 210 | err_t ethernet_input(struct pbuf *p, struct netif *netif);
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| 211 |
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| 212 | #define eth_addr_cmp(addr1, addr2) (memcmp((addr1)->addr, (addr2)->addr, ETHARP_HWADDR_LEN) == 0)
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| 213 |
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| 214 | extern const struct eth_addr ethbroadcast, ethzero;
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| 215 |
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| 216 | #endif /* LWIP_ARP || LWIP_ETHERNET */
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| 217 |
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| 218 | #ifdef __cplusplus
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| 219 | }
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| 220 | #endif
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| 221 |
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| 222 | #endif /* __NETIF_ARP_H__ */
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