Package jpcap.packet

Class TCPPacket

java.lang.Object

jpcap.packet.Packet

jpcap.packet.IPPacket

jpcap.packet.TCPPacket

All Implemented Interfaces:

Serializable

public class TCPPacket
extends IPPacket

This class represents TCP packet.

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
boolean	ack	ACK flag
long	ack_num	ACK number
int	dst_port	Destination port number
boolean	fin	FIN flag
byte[]	option	TCP option
boolean	psh	PSH flag
boolean	rst	RST flag
boolean	rsv1	RSV1 flag
boolean	rsv2	RSV2 flag
long	sequence	Sequence number
int	src_port	Source port number
boolean	syn	SYN flag
boolean	urg	URG flag
short	urgent_pointer	Urgent pointer
int	window	Window size

Fields inherited from class jpcap.packet.IPPacket

d_flag, dont_frag, dst_ip, flow_label, hop_limit, ident, IPPROTO_HOPOPT, IPPROTO_ICMP, IPPROTO_IGMP, IPPROTO_IP, IPPROTO_IPv6, IPPROTO_IPv6_Frag, IPPROTO_IPv6_ICMP, IPPROTO_IPv6_NoNxt, IPPROTO_IPv6_Opts, IPPROTO_IPv6_Route, IPPROTO_TCP, IPPROTO_UDP, length, more_frag, offset, options, priority, protocol, r_flag, rsv_frag, rsv_tos, src_ip, t_flag, version

Fields inherited from class jpcap.packet.Packet

caplen, data, datalink, EOF, header, len, sec, usec

Constructor Summary

Constructors

Constructor	Description
TCPPacket(int src_port, int dst_port, long sequence, long ack_num, boolean urg, boolean ack, boolean psh, boolean rst, boolean syn, boolean fin, boolean rsv1, boolean rsv2, int window, int urgent)	Creates a TCP packet.

Method Summary

Modifier and Type	Method	Description
String	toString()	Returns a string representation of this packet Format: src_port > dst_port seq(sequence) win(window) [ack ack_num] [S][F][P]

Methods inherited from class jpcap.packet.IPPacket

setIPv4Parameter, setIPv6Parameter

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Details

src_port

public int src_port

Source port number

dst_port

public int dst_port

Destination port number

sequence

public long sequence

Sequence number

ack_num

public long ack_num

ACK number

urg

public boolean urg

URG flag

ack

public boolean ack

ACK flag

psh

public boolean psh

PSH flag

rst

public boolean rst

RST flag

syn

public boolean syn

SYN flag

fin

public boolean fin

FIN flag

rsv1

public boolean rsv1

RSV1 flag

rsv2

public boolean rsv2

RSV2 flag

window

public int window

Window size

urgent_pointer

public short urgent_pointer

Urgent pointer

option

public byte[] option

TCP option

Constructor Details

TCPPacket

public TCPPacket(int src_port,
 int dst_port,
 long sequence,
 long ack_num,
 boolean urg,
 boolean ack,
 boolean psh,
 boolean rst,
 boolean syn,
 boolean fin,
 boolean rsv1,
 boolean rsv2,
 int window,
 int urgent)

Creates a TCP packet.

Parameters:

rsv1 - RSV1 flag

rsv2 - RSV2 flag

src_port - Source port number

dst_port - Destination port number

sequence - sequence number

ack_num - ACK number

urg - URG flag

ack - ACK flag

psh - PSH flag

rst - RST flag

syn - SYN flag

fin - FIN flag

window - window size

urgent - urgent pointer

Method Details

toString

public String toString()

Returns a string representation of this packet

Format: src_port > dst_port seq(sequence) win(window) [ack ack_num] [S][F][P]

Overrides:

toString in class IPPacket

Returns:

a string representation of this packet