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4707 | mejdrech | 1 | /* |
2 | * Copyright (c) 2009 Lukas Mejdrech |
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3 | * All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * |
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9 | * - Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * - Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * - The name of the author may not be used to endorse or promote products |
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15 | * derived from this software without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |||
29 | /** @addtogroup icmp |
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30 | * @{ |
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31 | */ |
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32 | |||
33 | /** @file |
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34 | * ICMP header definition. |
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35 | * Names according to the linux src/include/linux/icmp.h header file. |
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36 | */ |
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37 | |||
38 | #ifndef __NET_ICMP_HEADER_H__ |
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39 | #define __NET_ICMP_HEADER_H__ |
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40 | |||
41 | #include <sys/types.h> |
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42 | |||
43 | #include "../../include/in.h" |
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44 | #include "../../include/icmp_codes.h" |
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45 | |||
46 | /** Type definition of the user datagram header. |
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47 | * @see icmp_header |
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48 | */ |
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49 | typedef struct icmp_header icmp_header_t; |
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50 | |||
51 | /** Type definition of the user datagram header pointer. |
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52 | * @see icmp_header |
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53 | */ |
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54 | typedef icmp_header_t * icmp_header_ref; |
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55 | |||
56 | /** User datagram header. |
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57 | */ |
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58 | struct icmp_header{ |
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59 | /** Specifies the type of the message. |
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60 | */ |
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61 | uint8_t type; |
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62 | /** Contains the error code for the datagram reported by this ICMP message. |
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63 | * The interpretation is dependent on the message type. |
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64 | */ |
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65 | uint8_t code; |
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66 | /** Contains the checksum for the ICMP message starting with the ICMP Type field. |
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67 | * If the checksum does not match the contents, the datagram is discarded. |
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68 | */ |
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69 | uint16_t checksum; |
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70 | /** \todo |
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71 | */ |
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72 | union{ |
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73 | struct{ |
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74 | icmp_param_t id; |
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75 | icmp_param_t sequence; |
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76 | } echo; |
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77 | in_addr_t gateway; |
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78 | struct{ |
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79 | icmp_param_t unused; |
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80 | icmp_param_t mtu; |
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81 | } frag; |
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82 | struct{ |
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83 | icmp_param_t pointer; |
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84 | icmp_param_t unused; |
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85 | } param; |
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86 | } un; |
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87 | } __attribute__ ((packed)); |
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88 | |||
89 | #endif |
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90 | |||
91 | /** @} |
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92 | */ |