BadVPN – Blame information for rev 1
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1 | office | 1 | /** |
2 | * @file |
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3 | * ARP protocol definitions |
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4 | */ |
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5 | |||
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_ETHARP_H |
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38 | #define LWIP_HDR_PROT_ETHARP_H |
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39 | |||
40 | #include "lwip/arch.h" |
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41 | #include "lwip/prot/ethernet.h" |
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42 | |||
43 | #ifdef __cplusplus |
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44 | extern "C" { |
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45 | #endif |
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46 | |||
47 | #ifndef ETHARP_HWADDR_LEN |
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48 | #define ETHARP_HWADDR_LEN ETH_HWADDR_LEN |
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49 | #endif |
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50 | |||
51 | /** |
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52 | * struct ip4_addr_wordaligned is used in the definition of the ARP packet format in |
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53 | * order to support compilers that don't have structure packing. |
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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 ip4_addr_wordaligned { |
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60 | PACK_STRUCT_FIELD(u16_t addrw[2]); |
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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 | |||
67 | /** MEMCPY-like copying of IP addresses where addresses are known to be |
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68 | * 16-bit-aligned if the port is correctly configured (so a port could define |
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69 | * this to copying 2 u16_t's) - no NULL-pointer-checking needed. */ |
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70 | #ifndef IPADDR_WORDALIGNED_COPY_TO_IP4_ADDR_T |
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71 | #define IPADDR_WORDALIGNED_COPY_TO_IP4_ADDR_T(dest, src) SMEMCPY(dest, src, sizeof(ip4_addr_t)) |
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72 | #endif |
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73 | |||
74 | /** MEMCPY-like copying of IP addresses where addresses are known to be |
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75 | * 16-bit-aligned if the port is correctly configured (so a port could define |
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76 | * this to copying 2 u16_t's) - no NULL-pointer-checking needed. */ |
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77 | #ifndef IPADDR_WORDALIGNED_COPY_FROM_IP4_ADDR_T |
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78 | #define IPADDR_WORDALIGNED_COPY_FROM_IP4_ADDR_T(dest, src) SMEMCPY(dest, src, sizeof(ip4_addr_t)) |
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79 | #endif |
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80 | |||
81 | #ifdef PACK_STRUCT_USE_INCLUDES |
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82 | # include "arch/bpstruct.h" |
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83 | #endif |
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84 | PACK_STRUCT_BEGIN |
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85 | /** the ARP message, see RFC 826 ("Packet format") */ |
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86 | struct etharp_hdr { |
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87 | PACK_STRUCT_FIELD(u16_t hwtype); |
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88 | PACK_STRUCT_FIELD(u16_t proto); |
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89 | PACK_STRUCT_FLD_8(u8_t hwlen); |
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90 | PACK_STRUCT_FLD_8(u8_t protolen); |
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91 | PACK_STRUCT_FIELD(u16_t opcode); |
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92 | PACK_STRUCT_FLD_S(struct eth_addr shwaddr); |
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93 | PACK_STRUCT_FLD_S(struct ip4_addr_wordaligned sipaddr); |
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94 | PACK_STRUCT_FLD_S(struct eth_addr dhwaddr); |
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95 | PACK_STRUCT_FLD_S(struct ip4_addr_wordaligned dipaddr); |
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96 | } PACK_STRUCT_STRUCT; |
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97 | PACK_STRUCT_END |
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98 | #ifdef PACK_STRUCT_USE_INCLUDES |
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99 | # include "arch/epstruct.h" |
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100 | #endif |
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101 | |||
102 | #define SIZEOF_ETHARP_HDR 28 |
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103 | |||
104 | /* ARP message types (opcodes) */ |
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105 | enum etharp_opcode { |
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106 | ARP_REQUEST = 1, |
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107 | ARP_REPLY = 2 |
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108 | }; |
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109 | |||
110 | #ifdef __cplusplus |
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111 | } |
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112 | #endif |
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113 | |||
114 | #endif /* LWIP_HDR_PROT_ETHARP_H */ |