SSF.OS
Class IpHeader

java.lang.Object
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  +--SSF.OS.ProtocolMessage
        |
        +--SSF.OS.IpHeader

public class IpHeader

extends ProtocolMessage

IP packet Header class.

Field Summary

static int	DEFAULT_TIME_TO_LIVE Default limit on number of hops : 128
static byte	DELAY_BIT_MASK
int	DEST_IP The destination IP address of this IP packet.
int	NEXT_HOP_IP The next hop IP address, not in the standard IP header.
int	PROTOCOL_NO The protocol number for this header.
int	SOURCE_IP The source IP address of this IP packet.
static byte	THROUGHPUT_BIT_MASK
int	TIME_TO_LIVE The time-to-live field decremented by each router.
byte	TOS The type of service field.
static java.lang.String	VERSION The version of this IP protocol.

Constructor Summary

IpHeader(int prot_no, int src_ip, int dest_ip)
IP header constructor with default TTL.

IpHeader(int prot_no, int src_ip, int dest_ip, int ttl)
IP header constructor.

Method Summary

int	bytecount() Returns the total number of bytes in this IP packet.
java.lang.Object	getMeasurementBucket()
int	header_bytecount() Returns the size (in bytes) of the IP header only, doesn't include the payload, if any.
void	setMeasurementBucket(java.lang.Object meas) Attaches user-defined per-packet measurement data to this IP message.
java.lang.String	toString()

Methods inherited from class SSF.OS.ProtocolMessage

carryPayload, copy, dropHeader, dropPayload, frombytes, fromVersion, payload, previous, size, tobytes, version

Methods inherited from class java.lang.Object

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

Field Detail

VERSION

public static final java.lang.String VERSION

The version of this IP protocol.

See Also:

Constant Field Values

SOURCE_IP

public int SOURCE_IP

The source IP address of this IP packet.

DEST_IP

public int DEST_IP

The destination IP address of this IP packet.

PROTOCOL_NO

public int PROTOCOL_NO

The protocol number for this header.

TOS

public byte TOS

The type of service field.

THROUGHPUT_BIT_MASK

public static final byte THROUGHPUT_BIT_MASK

See Also:

Constant Field Values

DELAY_BIT_MASK

public static final byte DELAY_BIT_MASK

See Also:

Constant Field Values

TIME_TO_LIVE

public int TIME_TO_LIVE

The time-to-live field decremented by each router.

DEFAULT_TIME_TO_LIVE

public static final int DEFAULT_TIME_TO_LIVE

Default limit on number of hops : 128

See Also:

Constant Field Values

NEXT_HOP_IP

public int NEXT_HOP_IP

The next hop IP address, not in the standard IP header.

Constructor Detail

IpHeader

public IpHeader(int prot_no,
                int src_ip,
                int dest_ip,
                int ttl)

IP header constructor.

Parameters:

prot_no - Protocol number

src_ip - IP address of packet source

dest_ip - IP address of packet destination

ttl - time to live, in hops.

IpHeader

public IpHeader(int prot_no,
                int src_ip,
                int dest_ip)

IP header constructor with default TTL.

Parameters:

prot_no - Protocol number

src_ip - IP address of packet source

dest_ip - IP address of packet destination

Method Detail

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

header_bytecount

public int header_bytecount()

Returns the size (in bytes) of the IP header only, doesn't include the payload, if any.

Overrides:

header_bytecount in class ProtocolMessage

bytecount

public int bytecount()

Returns the total number of bytes in this IP packet.

Overrides:

bytecount in class ProtocolMessage

setMeasurementBucket

public void setMeasurementBucket(java.lang.Object meas)

Attaches user-defined per-packet measurement data to this IP message. Introduced by Christopher R. Kelley, NIST, Aug. 2000.

getMeasurementBucket

public java.lang.Object getMeasurementBucket()