edu.utah.janos.protocols.icmp
Class ICMPEcho

java.lang.Object
  |
  +--edu.utah.janos.util.Packet
        |
        +--edu.utah.janos.protocols.icmp.ICMPEcho

Direct Known Subclasses:

PingPacket

public class ICMPEcho

extends Packet

An ICMPEcho is a full ICMP ECHO_REQUEST packet, including the ip header, ICMP header, and a body segment.

Field Summary

static int	ICMP_SLOT The index of the ICMP header in the array of PacketSegments.
static int	ID_SEQ_SLOT The index of the Identifier/SequenceNumber option in the array of PacketSegments.
static int	IP_SLOT The index of the IP header in the array of PacketSegments.

Constructor Summary

ICMPEcho(boolean withID, PacketSegment body)
Construct, but don't initialize, an ICMP ECHO_REQUEST packet with the identifier and sequence number optional fields.

ICMPEcho(int src, int dst, PacketSegment body)
Construct an ICMP ECHO_REQUEST packet.

ICMPEcho(int src, int dst, short identifier, short sequenceNumber, PacketSegment body)
Construct an ICMP ECHO_REQUEST packet with the optional identifier and sequence number fields.

ICMPEcho(PacketSegment body)
Construct, but don't initialize, an ICMP ECHO_REQUEST packet.

Method Summary

short	getIdentifier()
short	getSequenceNumber()
void	setIdentifier(short id)
void	setSequenceNumber(short value)

Methods inherited from class edu.utah.janos.util.Packet

getLength, getSegments, marshal, marshal, toString, unmarshal, unmarshal

Methods inherited from class java.lang.Object

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

Field Detail

IP_SLOT

public static final int IP_SLOT

The index of the IP header in the array of PacketSegments.

ICMP_SLOT

public static final int ICMP_SLOT

The index of the ICMP header in the array of PacketSegments.

ID_SEQ_SLOT

public static final int ID_SEQ_SLOT

The index of the Identifier/SequenceNumber option in the array of PacketSegments.

Constructor Detail

ICMPEcho

public ICMPEcho(int src,
                int dst,
                PacketSegment body)

Construct an ICMP ECHO_REQUEST packet.

Parameters:

src - The source address for the packet.

dst - The destination address for the packet.

body - The body of the echo that will be sent back in the

body - reply packet.

ICMPEcho

public ICMPEcho(int src,
                int dst,
                short identifier,
                short sequenceNumber,
                PacketSegment body)

Construct an ICMP ECHO_REQUEST packet with the optional identifier and sequence number fields.

Parameters:

src - The source address for the packet.

dst - The destination address for the packet.

identifier - The value for the identifier field in the packet.

sequenceNumber - The value of the sequence number field in the

sequenceNumber - packet.

body - The body of the echo that will be sent back in the

body - reply packet.

ICMPEcho

public ICMPEcho(PacketSegment body)

Construct, but don't initialize, an ICMP ECHO_REQUEST packet.

Parameters:

body - The body of the echo packet.

ICMPEcho

public ICMPEcho(boolean withID,
                PacketSegment body)

Construct, but don't initialize, an ICMP ECHO_REQUEST packet with the identifier and sequence number optional fields.

Method Detail

getIdentifier

public short getIdentifier()

Returns:

The application specific identifier value.

setIdentifier

public void setIdentifier(short id)

Parameters:

id - The application specific identifier value.

getSequenceNumber

public short getSequenceNumber()

Returns:

The application specific sequence number value.

setSequenceNumber

public void setSequenceNumber(short value)

Parameters:

seqNum - The application specific sequence number value.