| 1 | /*
|
|---|
| 2 | * Copyright (c) 2011 Jiri Svoboda
|
|---|
| 3 | * All rights reserved.
|
|---|
| 4 | *
|
|---|
| 5 | * Redistribution and use in source and binary forms, with or without
|
|---|
| 6 | * modification, are permitted provided that the following conditions
|
|---|
| 7 | * are met:
|
|---|
| 8 | *
|
|---|
| 9 | * - Redistributions of source code must retain the above copyright
|
|---|
| 10 | * notice, this list of conditions and the following disclaimer.
|
|---|
| 11 | * - Redistributions in binary form must reproduce the above copyright
|
|---|
| 12 | * notice, this list of conditions and the following disclaimer in the
|
|---|
| 13 | * documentation and/or other materials provided with the distribution.
|
|---|
| 14 | * - The name of the author may not be used to endorse or promote products
|
|---|
| 15 | * derived from this software without specific prior written permission.
|
|---|
| 16 | *
|
|---|
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|---|
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|---|
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|---|
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|---|
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|---|
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|---|
| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|---|
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|---|
| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|---|
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|---|
| 27 | */
|
|---|
| 28 |
|
|---|
| 29 | /** @addtogroup tcp
|
|---|
| 30 | * @{
|
|---|
| 31 | */
|
|---|
| 32 | /** @file TCP header definitions
|
|---|
| 33 | *
|
|---|
| 34 | * Based on IETF RFC 793
|
|---|
| 35 | */
|
|---|
| 36 |
|
|---|
| 37 | #ifndef STD_H
|
|---|
| 38 | #define STD_H
|
|---|
| 39 |
|
|---|
| 40 | #include <sys/types.h>
|
|---|
| 41 |
|
|---|
| 42 | /** TCP Header (fixed part) */
|
|---|
| 43 | typedef struct {
|
|---|
| 44 | /** Source port */
|
|---|
| 45 | uint16_t src_port;
|
|---|
| 46 | /** Destination port */
|
|---|
| 47 | uint16_t dest_port;
|
|---|
| 48 | /** Sequence number */
|
|---|
| 49 | uint32_t seq;
|
|---|
| 50 | /** Acknowledgement number */
|
|---|
| 51 | uint32_t ack;
|
|---|
| 52 | /** Data Offset, Reserved, Flags */
|
|---|
| 53 | uint16_t doff_flags;
|
|---|
| 54 | /** Window */
|
|---|
| 55 | uint16_t window;
|
|---|
| 56 | /* Checksum */
|
|---|
| 57 | uint16_t checksum;
|
|---|
| 58 | /** Urgent pointer */
|
|---|
| 59 | uint16_t urg_ptr;
|
|---|
| 60 | } tcp_header_t;
|
|---|
| 61 |
|
|---|
| 62 | /** Bits in tcp_header_t.doff_flags */
|
|---|
| 63 | enum doff_flags_bits {
|
|---|
| 64 | DF_DATA_OFFSET_h = 15,
|
|---|
| 65 | DF_DATA_OFFSET_l = 12,
|
|---|
| 66 | DF_URG = 5,
|
|---|
| 67 | DF_ACK = 4,
|
|---|
| 68 | DF_PSH = 3,
|
|---|
| 69 | DF_RST = 2,
|
|---|
| 70 | DF_SYN = 1,
|
|---|
| 71 | DF_FIN = 0
|
|---|
| 72 | };
|
|---|
| 73 |
|
|---|
| 74 | /** TCP pseudo header */
|
|---|
| 75 | typedef struct {
|
|---|
| 76 | /** Source address */
|
|---|
| 77 | uint32_t src_addr;
|
|---|
| 78 | /** Destination address */
|
|---|
| 79 | uint32_t dest_addr;
|
|---|
| 80 | /** Zero */
|
|---|
| 81 | uint8_t zero;
|
|---|
| 82 | /** Protocol */
|
|---|
| 83 | uint8_t protocol;
|
|---|
| 84 | /** TCP length */
|
|---|
| 85 | uint16_t tcp_length;
|
|---|
| 86 | } tcp_phdr_t;
|
|---|
| 87 |
|
|---|
| 88 | /** Option kind */
|
|---|
| 89 | enum opt_kind {
|
|---|
| 90 | /** End of option list */
|
|---|
| 91 | OPT_END_LIST = 0,
|
|---|
| 92 | /** No-operation */
|
|---|
| 93 | OPT_NOP = 1,
|
|---|
| 94 | /** Maximum segment size */
|
|---|
| 95 | OPT_MAX_SEG_SIZE = 2
|
|---|
| 96 | };
|
|---|
| 97 |
|
|---|
| 98 | #endif
|
|---|
| 99 |
|
|---|
| 100 | /** @}
|
|---|
| 101 | */
|
|---|
