tcphdr Struct Reference

TCP protocol header structure. More...

#include <netinet/tcp.h>

Collaboration diagram for tcphdr:

Data Fields
uint16_t	th_sport
	Source port.
uint16_t	th_dport
	Destination port.
uint32_t	th_seq
	Sequence number of first octet in this segment.
uint32_t	th_ack
	Expected sequence number of next octet.
uint8_t	th_x2:4
	Unused.
uint8_t	th_off:4
	Data offset.
uint8_t	th_flags
	Control flags.
uint16_t	th_win
	Number of acceptable octects.
uint16_t	th_sum
	96 byte pseudo header checksum.
uint16_t	th_urp
	Urgent data pointer.

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Detailed Description

TCP protocol header structure.

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Field Documentation

uint16_t tcphdr::th_sport

Source port.

Referenced by NutTcpOutput(), and NutTcpSm().

uint16_t tcphdr::th_dport

Destination port.

Referenced by NutTcpOutput(), and NutTcpSm().

uint32_t tcphdr::th_seq

Sequence number of first octet in this segment.

Referenced by NutDumpTcpHeader(), and NutTcpOutput().

uint32_t tcphdr::th_ack

Expected sequence number of next octet.

Referenced by NutDumpTcpHeader(), and NutTcpOutput().

uint8_t tcphdr::th_x2

Unused.

Referenced by NutTcpOutput().

uint8_t tcphdr::th_off

Data offset.

Referenced by NutTcpInput(), and NutTcpOutput().

uint8_t tcphdr::th_flags

Control flags.

Referenced by NutDumpTcpHeader(), and NutTcpOutput().

uint16_t tcphdr::th_win

Number of acceptable octects.

Referenced by NutTcpOutput().

uint16_t tcphdr::th_sum

96 byte pseudo header checksum.

Referenced by NutTcpOutput().

uint16_t tcphdr::th_urp

Urgent data pointer.

Referenced by NutTcpOutput().

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The documentation for this struct was generated from the following file:

• include/netinet/tcp.h