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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 | |||
| 4715 | mejdrech | 46 | /** Type definition of the echo specific data. |
| 47 | * @see icmp_echo |
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| 48 | */ |
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| 49 | typedef struct icmp_echo icmp_echo_t; |
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| 50 | |||
| 51 | /** Type definition of the echo specific data pointer. |
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| 52 | * @see icmp_echo |
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| 53 | */ |
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| 54 | typedef icmp_echo_t * icmp_echo_ref; |
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| 55 | |||
| 56 | /** Echo specific data. |
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| 57 | */ |
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| 58 | struct icmp_echo{ |
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| 59 | /** Message idintifier. |
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| 60 | */ |
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| 61 | icmp_param_t id; |
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| 62 | /** Message sequence number. |
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| 63 | */ |
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| 64 | icmp_param_t sequence; |
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| 65 | } __attribute__ ((packed)); |
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| 66 | |||
| 67 | /** Type definition of the internet control message header. |
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| 4707 | mejdrech | 68 | * @see icmp_header |
| 69 | */ |
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| 70 | typedef struct icmp_header icmp_header_t; |
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| 71 | |||
| 4715 | mejdrech | 72 | /** Type definition of the internet control message header pointer. |
| 4707 | mejdrech | 73 | * @see icmp_header |
| 74 | */ |
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| 75 | typedef icmp_header_t * icmp_header_ref; |
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| 76 | |||
| 4715 | mejdrech | 77 | /** Internet control message header. |
| 4707 | mejdrech | 78 | */ |
| 79 | struct icmp_header{ |
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| 80 | /** Specifies the type of the message. |
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| 81 | */ |
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| 82 | uint8_t type; |
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| 83 | /** Contains the error code for the datagram reported by this ICMP message. |
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| 84 | * The interpretation is dependent on the message type. |
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| 85 | */ |
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| 86 | uint8_t code; |
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| 87 | /** Contains the checksum for the ICMP message starting with the ICMP Type field. |
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| 88 | * If the checksum does not match the contents, the datagram is discarded. |
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| 89 | */ |
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| 90 | uint16_t checksum; |
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| 4715 | mejdrech | 91 | /** Message specific data. |
| 4707 | mejdrech | 92 | */ |
| 93 | union{ |
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| 4715 | mejdrech | 94 | /** Echo specific data. |
| 95 | */ |
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| 96 | icmp_echo_t echo; |
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| 97 | /** Proposed gateway value. |
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| 98 | */ |
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| 4707 | mejdrech | 99 | in_addr_t gateway; |
| 4715 | mejdrech | 100 | /** Fragmentation needed specific data. |
| 101 | */ |
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| 4707 | mejdrech | 102 | struct{ |
| 4715 | mejdrech | 103 | /** Unused field. |
| 104 | */ |
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| 105 | icmp_param_t _unused; |
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| 106 | /** Proposed MTU. |
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| 107 | */ |
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| 4707 | mejdrech | 108 | icmp_param_t mtu; |
| 109 | } frag; |
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| 4715 | mejdrech | 110 | /** Parameter problem specific data. |
| 111 | */ |
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| 4707 | mejdrech | 112 | struct{ |
| 4715 | mejdrech | 113 | /** Problem pointer. |
| 114 | */ |
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| 4707 | mejdrech | 115 | icmp_param_t pointer; |
| 4715 | mejdrech | 116 | /** Unused field. |
| 117 | */ |
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| 118 | icmp_param_t _unused; |
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| 4707 | mejdrech | 119 | } param; |
| 120 | } un; |
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| 121 | } __attribute__ ((packed)); |
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| 122 | |||
| 123 | #endif |
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| 124 | |||
| 125 | /** @} |
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| 126 | */ |