jpcap
Class IPPacket

java.lang.Object
  |
  +--jpcap.Packet
        |
        +--jpcap.IPPacket

Direct Known Subclasses:

ICMPPacket, TCPPacket, UDPPacket

public class IPPacket

extends Packet

This class represents an IP packet.

Both IPv4 and IPv6 are supported.

Field Summary

boolean	d_flag IP flag bit: [D]elay (v4)
boolean	dont_frag Don't fragment flag (v4)
IPAddress	dst_ip Destination IP address
int	flow_label Flow label (v6)
short	hop_limit Hop Limit, Time To Live (TTL) (v4/v6)
int	ident IDENTIFICATION (v4)
short	length Packet length (v4/v6)
boolean	more_frag More fragment flag (v4)
short	offset Fragment offset (v4)
byte[]	option Option in IPv4 header (v4)
java.util.Vector	options Option headers in IPv6Option (v6)
byte	priority Priority (class) (v4/v6)
short	protocol Protocol (v4/v6)
boolean	r_flag IP flag bit: [R]eliability (v4)
boolean	rsv_frag Fragmentation reservation flag (v4)
byte	rsv_tos Type of Service (TOS) (v4/v6)
IPAddress	src_ip Source IP address
boolean	t_flag IP flag bit: [T]hrough (v4)
byte	version IP version (v4/v6)

Fields inherited from class jpcap.Packet

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

Constructor Summary

IPPacket()

Method Summary

void	setIPv4Parameter(int priority, boolean d_flag, boolean t_flag, boolean r_flag, int rsv_tos, boolean rsv_frag, boolean dont_frag, boolean more_frag, int offset, int ident, int ttl, int protocol, IPAddress src, IPAddress dst) Sets the IPv4 parameters
void	setIPv6Parameter(int cls, int flowlabel, int nxt_hdr, int hop_limit, IPAddress src, IPAddress dst) Sets the IPv6 parameters
java.lang.String	toString() Returns a string represenation of this packet.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

version

public byte version

IP version (v4/v6)

priority

public byte priority

Priority (class) (v4/v6)

d_flag

public boolean d_flag

IP flag bit: [D]elay (v4)

t_flag

public boolean t_flag

IP flag bit: [T]hrough (v4)

r_flag

public boolean r_flag

IP flag bit: [R]eliability (v4)

rsv_tos

public byte rsv_tos

Type of Service (TOS) (v4/v6)

length

public short length

Packet length (v4/v6)

rsv_frag

public boolean rsv_frag

Fragmentation reservation flag (v4)

dont_frag

public boolean dont_frag

Don't fragment flag (v4)

more_frag

public boolean more_frag

More fragment flag (v4)

offset

public short offset

Fragment offset (v4)

hop_limit

public short hop_limit

Hop Limit, Time To Live (TTL) (v4/v6)

protocol

public short protocol

Protocol (v4/v6)

ident

public int ident

IDENTIFICATION (v4)

flow_label

public int flow_label

Flow label (v6)

src_ip

public IPAddress src_ip

Source IP address

dst_ip

public IPAddress dst_ip

Destination IP address

option

public byte[] option

Option in IPv4 header (v4)

options

public java.util.Vector options

Option headers in IPv6Option (v6)

Constructor Detail

IPPacket

public IPPacket()

Method Detail

setIPv4Parameter

public void setIPv4Parameter(int priority,
                             boolean d_flag,
                             boolean t_flag,
                             boolean r_flag,
                             int rsv_tos,
                             boolean rsv_frag,
                             boolean dont_frag,
                             boolean more_frag,
                             int offset,
                             int ident,
                             int ttl,
                             int protocol,
                             IPAddress src,
                             IPAddress dst)

Sets the IPv4 parameters

Parameters:

d_flag - IP flag bit: [D]elay

t_flag - IP flag bit: [T]hrough

r_flag - IP flag bit: [R]eliability

rsv_tos - Type of Service (TOS)

priority - Priority

rsv_frag - Fragmentation Reservation flag

dont_frag - Don't fragment flag

more_frag - More fragment flag

offset - Offset

ident - Identifier

ttl - Time To Live

protocol - Protocol
This value is ignored when this packets inherits a higher layer protocol(e.g. TCPPacket)

src - Source IP address

dst - Destination IP address

setIPv6Parameter

public void setIPv6Parameter(int cls,
                             int flowlabel,
                             int nxt_hdr,
                             int hop_limit,
                             IPAddress src,
                             IPAddress dst)

Sets the IPv6 parameters

Parameters:

cls - class

flowlabel - flow label

nxt_hdr - next header

hop_limit - hop limit

src - source address

dst - destination address

toString

public java.lang.String toString()

Returns a string represenation of this packet.

Format(IPv4): src_ip->dst_ip protocol(protocol) priority(priority) [D][T][R] hop(hop_limit) [RF/][DF/][MF] offset(offset) ident(ident)

Format(IPv6): src_ip->dst_ip protocol(protocol) priority(priority) flowlabel(flow_label) hop(hop_limit)

Overrides:

toString in class Packet

Returns:

a string represenation of this packet