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etharp.h
00001 /** 00002 * @file 00003 * ARP protocol definitions 00004 */ 00005 00006 /* 00007 * Copyright (c) 2001-2004 Swedish Institute of Computer Science. 00008 * All rights reserved. 00009 * 00010 * Redistribution and use in source and binary forms, with or without modification, 00011 * are permitted provided that the following conditions are met: 00012 * 00013 * 1. Redistributions of source code must retain the above copyright notice, 00014 * this list of conditions and the following disclaimer. 00015 * 2. Redistributions in binary form must reproduce the above copyright notice, 00016 * this list of conditions and the following disclaimer in the documentation 00017 * and/or other materials provided with the distribution. 00018 * 3. The name of the author may not be used to endorse or promote products 00019 * derived from this software without specific prior written permission. 00020 * 00021 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 00022 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 00023 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 00024 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 00025 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 00026 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 00027 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 00028 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 00029 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 00030 * OF SUCH DAMAGE. 00031 * 00032 * This file is part of the lwIP TCP/IP stack. 00033 * 00034 * Author: Adam Dunkels <adam@sics.se> 00035 * 00036 */ 00037 #ifndef LWIP_HDR_PROT_ETHARP_H 00038 #define LWIP_HDR_PROT_ETHARP_H 00039 00040 #include "lwip/arch.h" 00041 #include "lwip/prot/lwip_ethernet.h" 00042 #include "lwip/ip4_addr.h" 00043 00044 #ifdef __cplusplus 00045 extern "C" { 00046 #endif 00047 00048 #ifndef ETHARP_HWADDR_LEN 00049 #define ETHARP_HWADDR_LEN ETH_HWADDR_LEN 00050 #endif 00051 00052 #ifdef PACK_STRUCT_USE_INCLUDES 00053 # include "arch/bpstruct.h" 00054 #endif 00055 PACK_STRUCT_BEGIN 00056 /** the ARP message, see RFC 826 ("Packet format") */ 00057 struct etharp_hdr { 00058 PACK_STRUCT_FIELD(u16_t hwtype); 00059 PACK_STRUCT_FIELD(u16_t proto); 00060 PACK_STRUCT_FLD_8(u8_t hwlen); 00061 PACK_STRUCT_FLD_8(u8_t protolen); 00062 PACK_STRUCT_FIELD(u16_t opcode); 00063 PACK_STRUCT_FLD_S(struct eth_addr shwaddr); 00064 PACK_STRUCT_FLD_S(struct ip4_addr2 sipaddr); 00065 PACK_STRUCT_FLD_S(struct eth_addr dhwaddr); 00066 PACK_STRUCT_FLD_S(struct ip4_addr2 dipaddr); 00067 } PACK_STRUCT_STRUCT; 00068 PACK_STRUCT_END 00069 #ifdef PACK_STRUCT_USE_INCLUDES 00070 # include "arch/epstruct.h" 00071 #endif 00072 00073 #define SIZEOF_ETHARP_HDR 28 00074 00075 /* ARP hwtype values */ 00076 enum etharp_hwtype { 00077 HWTYPE_ETHERNET = 1 00078 /* others not used */ 00079 }; 00080 00081 /* ARP message types (opcodes) */ 00082 enum etharp_opcode { 00083 ARP_REQUEST = 1, 00084 ARP_REPLY = 2 00085 }; 00086 00087 #ifdef __cplusplus 00088 } 00089 #endif 00090 00091 #endif /* LWIP_HDR_PROT_ETHARP_H */
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