| 1 | /*
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| 2 | * Copyright (c) 2012 Jiri Svoboda
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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 |
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| 29 | /** @addtogroup inet
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| 30 | * @{
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| 31 | */
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| 32 | /**
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| 33 | * @file IP header definitions
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| 34 | *
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| 35 | */
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| 36 |
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| 37 | #ifndef INET_STD_H_
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| 38 | #define INET_STD_H_
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| 39 |
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| 40 | #include <sys/types.h>
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| 41 |
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| 42 | /** Internet Datagram header (fixed part) */
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| 43 | typedef struct {
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| 44 | /** Version, Internet Header Length */
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| 45 | uint8_t ver_ihl;
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| 46 | /* Type of Service */
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| 47 | uint8_t tos;
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| 48 | /** Total Length */
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| 49 | uint16_t tot_len;
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| 50 | /** Identification */
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| 51 | uint16_t id;
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| 52 | /** Flags, Fragment Offset */
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| 53 | uint16_t flags_foff;
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| 54 | /** Time to Live */
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| 55 | uint8_t ttl;
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| 56 | /** Protocol */
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| 57 | uint8_t proto;
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| 58 | /** Header Checksum */
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| 59 | uint16_t chksum;
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| 60 | /** Source Address */
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| 61 | uint32_t src_addr;
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| 62 | /** Destination Address */
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| 63 | uint32_t dest_addr;
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| 64 | } ip_header_t;
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| 65 |
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| 66 | /** Bits in ip_header_t.ver_ihl */
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| 67 | enum ver_ihl_bits {
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| 68 | /** Version, highest bit */
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| 69 | VI_VERSION_h = 7,
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| 70 | /** Version, lowest bit */
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| 71 | VI_VERSION_l = 4,
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| 72 | /** Internet Header Length, highest bit */
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| 73 | VI_IHL_h = 3,
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| 74 | /** Internet Header Length, lowest bit */
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| 75 | VI_IHL_l = 0
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| 76 | };
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| 77 |
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| 78 | /** Bits in ip_header_t.flags_foff */
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| 79 | enum flags_foff_bits {
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| 80 | /** Reserved, must be zero */
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| 81 | FF_FLAG_RSVD = 15,
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| 82 | /** Don't Fragment */
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| 83 | FF_FLAG_DF = 14,
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| 84 | /** More Fragments */
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| 85 | FF_FLAG_MF = 13,
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| 86 | /** Fragment Offset, highest bit */
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| 87 | FF_FRAGOFF_h = 12,
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| 88 | /** Fragment Offset, lowest bit */
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| 89 | FF_FRAGOFF_l = 0
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| 90 | };
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| 91 |
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| 92 | #endif
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| 93 |
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| 94 | /** @}
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| 95 | */
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