net.sourceforge.jpcap.net
Class IPProtocol

java.lang.Object
  net.sourceforge.jpcap.net.IPProtocol

All Implemented Interfaces:

IPProtocols

public class IPProtocol
extends Object
implements IPProtocols

IPProtocol utility class.

Version:

$Revision: 1.1 $

Author:

Patrick Charles and Jonas Lehmann

Last modified by:

$Author: esmondpitt $

Last modified at:

$Date: 2008/08/21 02:58:23 $

Field Summary

Fields inherited from interface net.sourceforge.jpcap.net.IPProtocols

AH, COMP, DSTOPTS, EGP, ENCAP, ESP, FRAGMENT, GRE, HOPOPTS, ICMP, ICMPV6, IDP, IGMP, INVALID, IP, IPIP, IPV6, MASK, MTP, NONE, PIM, PUP, RAW, ROUTING, RSVP, TCP, TP, UDP

Constructor Summary

IPProtocol()

Method Summary

static int	extractProtocol(int lLen, byte[] packetBytes) Extract the protocol code from packet data.
static String	getDescription(int code) Fetch a protocol description.

Methods inherited from class java.lang.Object

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

Constructor Detail

IPProtocol

public IPProtocol()

Method Detail

getDescription

public static String getDescription(int code)

Fetch a protocol description.

Parameters:

code - the code associated with the message.

Returns:

a message describing the significance of the IP protocol.

extractProtocol

public static int extractProtocol(int lLen,
                                  byte[] packetBytes)

Extract the protocol code from packet data. The packet data must contain an IP datagram. The protocol code specifies what kind of information is contained in the data block of the ip datagram.

Parameters:

lLen - the length of the link-level header.

packetBytes - packet bytes, including the link-layer header.

Returns:

the IP protocol code. i.e. 0x06 signifies TCP protocol.