proconX: Protocol Converter & Gateways

Smart Industrial Communication and Embeddeded Ethernet Solutions

Serial Device Server

Programmable Gateways

Serial/Ethernet Gateway XNUT-100

CAN/Ethernet Gateway XNUT-105

Ethernet CPU Boards

Information and Support

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tcphdr Struct Reference

#include <netinet/tcp.h>

Detailed Description

TCP protocol header structure.

Data Fields

u_short th_sport

Source port.

u_short th_dport

Destination port.

u_long th_seq

Sequence number of first octet in this segment.

u_long th_ack

Expected sequence number of next octet.

u_char th_x2:4

Unused.

u_char th_off:4

Data offset.

u_char th_flags

Control flags.

u_short th_win

Number of acceptable octects.

u_short th_sum

96 byte pseudo header checksum

u_short th_urp

Urgent data pointer.