drcl.inet.transport
Class TCPPacket

java.lang.Object
  |
  +--drcl.DrclObj
        |
        +--drcl.net.Packet
              |
              +--drcl.inet.transport.TCPPacket

All Implemented Interfaces:

java.lang.Cloneable, ObjectDuplicable, PacketWrapper, java.io.Serializable

public class TCPPacket

extends Packet

This class defines the TCP packet header. Fields implemented in this class are SOURCE_port, DEST_port, SEQNo, ACKNo, AdvertisedWnd, ACK, SYN, FIN, SACK option, timestamp option. RFC requirements NOT implemented in this class are URG, PSH, RST, TCP checksum, Urgent pointer, and other options References:

• [TCPILL1] W. Stevens, TCP/IP Illustrated vol.1: The Protocols, Addison-Wesley,1994.
• [TCPILL2] G. Wright and W. Stevens, TCP/IP Illustrated vol.2: The Implementation, Addison-Wesley,1995
• [RFC793] J. Postel, Transmission Control Protocol, September 1981.
• [RFC2018] M. Mathis, J. Mahdavi, S. Floyd and A. Romanow, TCP Selective Acknowledgment Options, Octobor 1996.
• [RFC2581] M. Allman, V. Paxson and W. Stevens, TCP Congestion Control, April 1999.

See Also:

Serialized Form

Field Summary

static int	FLAG_ACK
static int	FLAG_FIN
static int	FLAG_SACK
static int	FLAG_SYN
static long	MSS Size of maximum transmission unit, used to set/calculate packet count from sequence number.

Fields inherited from class drcl.net.Packet

body, headerSize, id, size

Constructor Summary

TCPPacket()

TCPPacket(int sport_, int dport_, long Seqno_, long AckNo_, int AdvWin_, boolean Ack_, boolean SYN_, boolean FIN_, double ts_, double ats_, boolean sack_, int sackLen_, int hsize_, int bsize_, java.lang.Object body_)
Constructor for TCPPacket with SACK option.

TCPPacket(int sport_, int dport_, long Seqno_, long AckNo_, int AdvWin_, boolean Ack_, boolean SYN_, boolean FIN_, double ts_, double ats_, int hsize_, int bsize_, java.lang.Object body_)
Constructor for TCPPacket without SACK option.

Method Summary

java.lang.String	_toString(java.lang.String separator_) Prints the packet header.
java.lang.Object	clone() Returns a clone of this wrapper instance.
void	duplicate(java.lang.Object source_) opies the content of the source_ object to this object.
long	getAckNo()
int	getAdvWin()
double	getaTS()
long	getByteCount() Returns the byte count of this packet in the connection to which this packet belongs.
int	getDPort()
long[]	getLEblk()
java.lang.String	getName() Returns the name of this packet.
int	getPacketCount() Returns the count of this packet in the connection to which this packet belongs.
java.lang.String	getPacketType() Returns the type of packet.
long[]	getREblk()
int	getSACKLen()
long	getSeqNo()
int	getSPort()
double	getTS()
boolean	isACK()
boolean	isFIN()
boolean	isSACK()
boolean	isSYN()
void	setACK(boolean enabled_)
void	setaTS(double aTS_)
void	setFIN(boolean enabled_)
void	setLEblk(long[] LEblk_)
void	setREblk(long[] REblk_)
void	setSACK(boolean enabled_)
void	setSACKBlocks(long[] LEblk_, long[] REblk_)
void	setSACKLen(int len_)
void	setSeqNo(long seqno_)
void	setSYN(boolean enabled_)
void	setTS(double ts_)

Methods inherited from class drcl.net.Packet

equals, getBody, getHeaderSize, getPacketSize, setBody, setBody, setHeaderSize, setPacketSize, setSize, toString, toString, wraps

Methods inherited from class java.lang.Object

finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

MSS

public static long MSS

Size of maximum transmission unit, used to set/calculate packet count from sequence number.

FLAG_ACK

public static final int FLAG_ACK

FLAG_SYN

public static final int FLAG_SYN

FLAG_FIN

public static final int FLAG_FIN

FLAG_SACK

public static final int FLAG_SACK

Constructor Detail

TCPPacket

public TCPPacket()

TCPPacket

public TCPPacket(int sport_,
                 int dport_,
                 long Seqno_,
                 long AckNo_,
                 int AdvWin_,
                 boolean Ack_,
                 boolean SYN_,
                 boolean FIN_,
                 double ts_,
                 double ats_,
                 int hsize_,
                 int bsize_,
                 java.lang.Object body_)

Constructor for TCPPacket without SACK option.

Parameters:

Seqno_ - Sequence number of data

AckNo_ - Acknowledge sequence number

AdvWin_ - Advertised window

Ack_ - flag ACK

SYN_ - flag SYN

FIN_ - flag FIN

ts_ - Timestamp

ats_ - Ackknowledge Timestamp

hsize_ - header size, calculated by caller

bsize_ - body size

body_ - body

TCPPacket

public TCPPacket(int sport_,
                 int dport_,
                 long Seqno_,
                 long AckNo_,
                 int AdvWin_,
                 boolean Ack_,
                 boolean SYN_,
                 boolean FIN_,
                 double ts_,
                 double ats_,
                 boolean sack_,
                 int sackLen_,
                 int hsize_,
                 int bsize_,
                 java.lang.Object body_)

Constructor for TCPPacket with SACK option.

Parameters:

Seqno_ - Sequence number of data

AckNo_ - Acknowledge sequence number

AdvWin_ - Advertised window

Ack_ - flag ACK

SYN_ - flag SYN

FIN_ - flag FIN

ts_ - Timestamp

ats_ - Ackknowledge Timestamp

sack_ - flag SACK

sackLen_ - # of SACK blocks

hsize_ - header size, calculated by caller

bsize_ - body size

body_ - body

Method Detail

getName

public java.lang.String getName()

Description copied from class: Packet

Returns the name of this packet.

Overrides:

getName in class Packet

getPacketCount

public int getPacketCount()

Description copied from class: Packet

Returns the count of this packet in the connection to which this packet belongs. By default, it delegates the call to the encapsulated packet, and throws a PacketException if the encapsulated object is not a packet.

Overrides:

getPacketCount in class Packet

getByteCount

public long getByteCount()

Description copied from class: Packet

Returns the byte count of this packet in the connection to which this packet belongs. By default, it delegates the call to the encapsulated packet, and throws a PacketException if the encapsulated object is not a packet. This method approximates the byte count with the byte count obtained from the encapsulated packet plus the header size times the packet count.

Overrides:

getByteCount in class Packet

getDPort

public int getDPort()

getSPort

public int getSPort()

getTS

public double getTS()

setTS

public void setTS(double ts_)

getaTS

public double getaTS()

setaTS

public void setaTS(double aTS_)

setSeqNo

public void setSeqNo(long seqno_)

getSeqNo

public long getSeqNo()

getAckNo

public long getAckNo()

getAdvWin

public int getAdvWin()

setACK

public void setACK(boolean enabled_)

isACK

public boolean isACK()

setSYN

public void setSYN(boolean enabled_)

isSYN

public boolean isSYN()

setFIN

public void setFIN(boolean enabled_)

isFIN

public boolean isFIN()

setSACK

public void setSACK(boolean enabled_)

isSACK

public boolean isSACK()

getSACKLen

public int getSACKLen()

setSACKLen

public void setSACKLen(int len_)

getLEblk

public long[] getLEblk()

setLEblk

public void setLEblk(long[] LEblk_)

getREblk

public long[] getREblk()

setREblk

public void setREblk(long[] REblk_)

setSACKBlocks

public void setSACKBlocks(long[] LEblk_,
                          long[] REblk_)

clone

public java.lang.Object clone()

Description copied from interface: PacketWrapper

Returns a clone of this wrapper instance.

Overrides:

clone in class DrclObj

duplicate

public void duplicate(java.lang.Object source_)

Description copied from class: DrclObj

opies the content of the source_ object to this object. he subclass must implement this method to realize DrclObj.clone().

Overrides:

duplicate in class Packet

getPacketType

public java.lang.String getPacketType()

Description copied from class: Packet

Returns the type of packet. By default, it delegates the call to the encapsulated packet, and returns Packet.getName() otherwise.

Overrides:

getPacketType in class Packet

_toString

public java.lang.String _toString(java.lang.String separator_)

Description copied from class: Packet

Prints the packet header.

Overrides:

_toString in class Packet