57 lines
1.7 KiB
C
57 lines
1.7 KiB
C
/*
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* Copyright (C) 2017 Simon Brummer
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @defgroup net_tcp TCP
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* @ingroup net
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* @brief Provides TCP header and helper functions
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*
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* @{
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*
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* @file
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* @brief TCP header and helper functions
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*
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* @author Simon Brummer <brummer.simon@googlemail.com>
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*/
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#ifndef TCP_H
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#define TCP_H
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#include "byteorder.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @brief TCP Options could contain up to 10 32-Bit values of Information.
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*/
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#define TCP_MAX_HDR_OPTIONS 10
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/**
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* @brief TCP header definition
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*/
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typedef struct __attribute__((packed)) {
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network_uint16_t src_port; /**< source port, in network byte order */
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network_uint16_t dst_port; /**< destination port, in network byte order */
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network_uint32_t seq_num; /**< sequence number, in network byte order */
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network_uint32_t ack_num; /**< Acknowledgement number, in network byte order */
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network_uint16_t off_ctl; /**< Data Offset and control Bits in network byte order */
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network_uint16_t window; /**< window, in network byte order */
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network_uint16_t checksum; /**< checksum, in network byte order */
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network_uint16_t urgent_ptr; /**< urgent pointer, in network byte order */
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network_uint32_t options[TCP_MAX_HDR_OPTIONS]; /**< Option Fields (Optional) */
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} tcp_hdr_t;
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#ifdef __cplusplus
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}
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#endif
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#endif /* TCP_H */
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/** @} */
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