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tcp.h
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1/*
2 * Copyright (C) 2015-2017 Simon Brummer
3 *
4 * This file is subject to the terms and conditions of the GNU Lesser
5 * General Public License v2.1. See the file LICENSE in the top level
6 * directory for more details.
7 */
8
22#ifndef NET_TCP_H
23#define NET_TCP_H
24
25#include "byteorder.h"
26
27#ifdef __cplusplus
28extern "C" {
29#endif
30
35#define TCP_HDR_OFFSET_MIN (0x05)
36#define TCP_HDR_OFFSET_MAX (0x0F)
43#define TCP_OPTION_KIND_EOL (0x00)
44#define TCP_OPTION_KIND_NOP (0x01)
45#define TCP_OPTION_KIND_MSS (0x02)
52#define TCP_OPTION_LENGTH_MIN (2U)
53#define TCP_OPTION_LENGTH_MSS (0x04)
69
73typedef struct __attribute__((packed)) {
74 uint8_t kind;
75 uint8_t length;
76 uint8_t value[];
78
85
86#ifdef __cplusplus
87}
88#endif
89
90#endif /* NET_TCP_H */
Functions to work with different byte orders.
void tcp_hdr_print(tcp_hdr_t *hdr)
Print the given TCP header to STDOUT.
TCP option field helper structure.
Definition tcp.h:73
uint8_t kind
TCP options "Kind" field.
Definition tcp.h:74
uint8_t length
TCP options "Length" field.
Definition tcp.h:75
TCP header definition.
Definition tcp.h:59
network_uint16_t dst_port
Destination port, in network byte order.
Definition tcp.h:61
network_uint16_t src_port
Source port, in network byte order.
Definition tcp.h:60
network_uint32_t ack_num
Acknowledgement number, in network byte order.
Definition tcp.h:63
network_uint16_t urgent_ptr
Urgent pointer, in network byte order.
Definition tcp.h:67
network_uint32_t seq_num
Sequence number, in network byte order.
Definition tcp.h:62
network_uint16_t window
Window, in network byte order.
Definition tcp.h:65
network_uint16_t checksum
Checksum, in network byte order.
Definition tcp.h:66
network_uint16_t off_ctl
Data Offset and control Bits in network byte order.
Definition tcp.h:64
A 16 bit integer in big endian aka network byte order.
Definition byteorder.h:74
A 32 bit integer in big endian aka network byte order.
Definition byteorder.h:84