net.clackrouter.packets
Class VNSICMPPacket

java.lang.Object
  net.clackrouter.protocol.data.VNSData
      net.clackrouter.packets.VNSPacket
          net.clackrouter.packets.VNSICMPPacket

public final class VNSICMPPacket
extends VNSPacket

Encapsulates Internet Control Message Protocol packet. Defined in RFC 792.

Field Summary

static byte	PARAM_PROBLEM_CHECKSUM
static byte	PARAM_PROBLEM_ID
static byte	PARAM_PROBLEM_PROTOCOL
static byte	PARAM_PROBLEM_TOS
static byte	PARAM_PROBLEM_TOTAL_LEN
static byte	PARAM_PROBLEM_TTL
static byte	PARAM_PROBLEM_VER_AND_IHL

Fields inherited from class net.clackrouter.packets.VNSPacket

m_inputInterfaceName, m_length, m_level2Type, m_local_packet, m_nextHopIPAddr, m_nextHopMacAddr, m_outputInterfaceName, m_packetByteBuffer, mParentHeader

Constructor Summary

protected	VNSICMPPacket()
	VNSICMPPacket(java.nio.ByteBuffer packetBuffer) Constructs an IMCP packet from the supplied byte buffer.

Method Summary

short	calculateChecksum() Calculates the checksum of this ICMP packet.
void	constructByteBufferEcho(byte type, int identifier, int seq_num)
VNSICMPCode	getCode()
byte[]	getData() Returns any data from this ICMP packet
VNSICMPType	getType() Returns the type of the ICMP packet.
static java.awt.Point	parseEcho(VNSICMPPacket icmp_packet)
java.lang.String	toString() Represents the ICMP packet in a readable format, by field.
static VNSICMPPacket	wrapEcho(byte type, int identifier, int seq_num)
static VNSICMPPacket	wrapEchoReply(VNSICMPPacket echo_request)
static VNSICMPPacket	wrapParamProblem(VNSICMPCode code, IPPacket expired_packet, byte paramProblem)
static VNSICMPPacket	wrapTimeExceeded(VNSICMPCode code, IPPacket expired_packet)
static VNSICMPPacket	wrapUnreach(VNSICMPCode code, IPPacket bad_port_packet)

Methods inherited from class net.clackrouter.packets.VNSPacket

addToPath, get16bit, get32bit, getByteBuffer, getInputInterfaceName, getLength, getLevel2Type, getNextHopIPAddress, getNextHopMacAddress, getOutputInterfaceName, getParentHeader, getStringBuffer, isPacket, needsSourceAddress, setByteBuffer, setInputInterfaceName, setLevel2Type, setNeedsSourceAddress, setNextHopIPAddress, setNextHopMacAddress, setOutputInterfaceName, setParentHeader

Methods inherited from class net.clackrouter.protocol.data.VNSData

isBanner, isClose, isHWInfo

Methods inherited from class java.lang.Object

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

Field Detail

PARAM_PROBLEM_VER_AND_IHL

public static final byte PARAM_PROBLEM_VER_AND_IHL

See Also:

Constant Field Values

PARAM_PROBLEM_TOS

public static final byte PARAM_PROBLEM_TOS

See Also:

Constant Field Values

PARAM_PROBLEM_TOTAL_LEN

public static final byte PARAM_PROBLEM_TOTAL_LEN

See Also:

Constant Field Values

PARAM_PROBLEM_ID

public static final byte PARAM_PROBLEM_ID

See Also:

Constant Field Values

PARAM_PROBLEM_TTL

public static final byte PARAM_PROBLEM_TTL

See Also:

Constant Field Values

PARAM_PROBLEM_PROTOCOL

public static final byte PARAM_PROBLEM_PROTOCOL

See Also:

Constant Field Values

PARAM_PROBLEM_CHECKSUM

public static final byte PARAM_PROBLEM_CHECKSUM

See Also:

Constant Field Values

Constructor Detail

VNSICMPPacket

public VNSICMPPacket(java.nio.ByteBuffer packetBuffer)

Constructs an IMCP packet from the supplied byte buffer.

Parameters:

packetBuffer - Byte buffer containing an ICMP packet

VNSICMPPacket

protected VNSICMPPacket()

Method Detail

wrapUnreach

public static VNSICMPPacket wrapUnreach(VNSICMPCode code,
                                        IPPacket bad_port_packet)
                                 throws VNSUnknownICMPCodeException

Throws:

VNSUnknownICMPCodeException

wrapTimeExceeded

public static VNSICMPPacket wrapTimeExceeded(VNSICMPCode code,
                                             IPPacket expired_packet)
                                      throws VNSUnknownICMPCodeException

Throws:

VNSUnknownICMPCodeException

wrapParamProblem

public static VNSICMPPacket wrapParamProblem(VNSICMPCode code,
                                             IPPacket expired_packet,
                                             byte paramProblem)
                                      throws VNSUnknownICMPCodeException

Throws:

VNSUnknownICMPCodeException

wrapEchoReply

public static VNSICMPPacket wrapEchoReply(VNSICMPPacket echo_request)

parseEcho

public static java.awt.Point parseEcho(VNSICMPPacket icmp_packet)

wrapEcho

public static VNSICMPPacket wrapEcho(byte type,
                                     int identifier,
                                     int seq_num)

constructByteBufferEcho

public void constructByteBufferEcho(byte type,
                                    int identifier,
                                    int seq_num)

calculateChecksum

public short calculateChecksum()

Calculates the checksum of this ICMP packet. The checksum field is the 16 bit one's complement of the one's complement sum of all 16 bit words in the header. For purposes of computing the checksum, the value of the checksum field is zero.

Returns:

Checksum

getType

public VNSICMPType getType()

Returns the type of the ICMP packet.

Returns:

Type of the ICMP packet

getData

public byte[] getData()

Returns any data from this ICMP packet

getCode

public VNSICMPCode getCode()

toString

public java.lang.String toString()

Represents the ICMP packet in a readable format, by field.

Overrides:

toString in class VNSPacket

Returns:

Interface information in a readable format, by field