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tcp_frame Struct Reference

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Detailed Description

This structure holds header fields from the received TCP packet.

In addition to standard header fields, buf_index field has been added allowing applications to re-read the received data many times by reinitializing reading based on the address stored in this field.

Definition at line 538 of file tcp_ip.h.

Data Fields
UINT16	sport
UINT16	dport
UINT32	seqno
UINT32	ackno
UINT16	hlen_flags
UINT16	window
UINT16	checksum
UINT16	urgent
UINT8	opt [MAX_TCP_OPTLEN+1]
UINT16	buf_index

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Field Documentation

UINT16 tcp_frame::sport

Source port Definition at line 540 of file tcp_ip.h. Referenced by process_tcp_in(), tcp_mapsocket(), and tcp_sendreset().

UINT16 tcp_frame::dport

Destination port Definition at line 541 of file tcp_ip.h. Referenced by process_tcp_in(), tcp_mapsocket(), and tcp_sendreset().

UINT32 tcp_frame::seqno

Sequence number Definition at line 542 of file tcp_ip.h. Referenced by process_tcp_in(), and tcp_sendreset().

UINT32 tcp_frame::ackno

Acknowledgement number Definition at line 543 of file tcp_ip.h. Referenced by process_tcp_in(), and tcp_sendreset().

UINT16 tcp_frame::hlen_flags

Header length and flags Definition at line 544 of file tcp_ip.h. Referenced by process_tcp_in(), tcp_mapsocket(), and tcp_sendreset().

UINT16 tcp_frame::window

Size of window Definition at line 545 of file tcp_ip.h. Referenced by process_tcp_in().

UINT16 tcp_frame::checksum

TCP packet checksum Definition at line 546 of file tcp_ip.h. Referenced by process_tcp_in().

UINT16 tcp_frame::urgent

Urgent pointer Definition at line 547 of file tcp_ip.h. Referenced by process_tcp_in().

UINT8 tcp_frame::opt[MAX_TCP_OPTLEN + 1]

Option field Definition at line 548 of file tcp_ip.h. Referenced by process_tcp_in().

UINT16 tcp_frame::buf_index

Next offset from the start of network buffer Definition at line 549 of file tcp_ip.h. Referenced by process_tcp_in().

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

• /opentcp/include/inet/tcp_ip.h

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