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The Open Source version of the IBM Toolbox for Java
///////////////////////////////////////////////////////////////////////////////
//
// JTOpen (IBM Toolbox for Java - OSS version)
//
// Filename: IP6Header.java
//
// The source code contained herein is licensed under the IBM Public License
// Version 1.0, which has been approved by the Open Source Initiative.
// Copyright (C) 2002 International Business Machines Corporation and
// others. All rights reserved.
//
///////////////////////////////////////////////////////////////////////////////
package com.ibm.as400.util.commtrace;
import com.ibm.as400.access.Trace;
import java.util.Properties;
/**
* An IPv6 Header.
* Extends Header's methods to parse, print, and allow easy access to the IPv6 Header.
*/
public class IP6Header extends Header {
Field version= new Dec(rawheader.slice(0, 4));
Field trafficclass= new Hex(rawheader.slice(4, 8));
Field flowlabel= new Hex(rawheader.slice(12, 20));
Field payloadlength= new Dec(rawheader.slice(32, 16));
Field nextheaderh= new Hex(rawheader.slice(48, 8));
Field nextheader= new Dec(rawheader.slice(48, 8));
Field hoplimit= new Dec(rawheader.slice(56, 8));
Field src= new IP6Address(rawheader.slice(64, 128));
Field dst= new IP6Address(rawheader.slice(192, 128));
private final static String CLASS="IP6Header";
private final static String ICMPV6= "ICMPv6";
private final static String TCP= "TCP";
private final static String UDP= "UDP";
private final static String EXTHOPHOP= "ExtHeader Hop by Hop";
private final static String EXTROUTE= "ExtHeader Routing";
private final static String EXTFRAG= "ExtHeader Fragmentation";
private final static String EXTESP= "ExtHeader ESP";
private final static String EXTAH= "ExtHeader AH";
private final static String EXTDST= "ExtHeader Destination";
private final static String IPV6DATA= "IPv6 Data";
private final static String VER= "Ver";
private final static String TRAFFICCLASS= "TrafficClass";
private final static String FLWLBL= "FlowLabel";
private final static String PAYLOADLENGTH= "PayloadLength";
private final static String NXTHDR= "NextHeader";
private final static String HOPLIMIT= "HopLimit";
private final static String SRC= "Src";
private final static String DST= "Dst";
/**
* Creates and parses the data of this header.
* @param data The raw data of this header.
*/
IP6Header(BitBuf data) {
super(data);
type= IP6;
}
/**
* Returns the length of this header.
* @return Will always return 320.
*/
public int getHeaderLen() {
return 320;
}
public Header getNextHeader() {
return Header.createHeader(rawheader.slice(48, 8).toByte(), rawpayload);
}
/**
* Returns a printable representation of this header.
* @param filter FormatProperties object for filtering this header.
* @return Returns a string representation of this header.
*/
public String toString(FormatProperties filter) {
String nextheaders= "";
// Make sure we have enough data to parse a full header
if (rawheader.getBitSize() < getHeaderLen()) {
return (new Data(rawheader)).toString();
}
int protocol= Integer.parseInt(nextheader.toString());
// Check for IP filtering
if (filter!=null) { // If filter is enabled
boolean print= false;
String IPaddr= filter.getIPAddress(),
IPaddr2= filter.getSecondIPAddress();
if (Trace.isTraceOn() && Trace.isTraceInformationOn()) {
Trace.log(Trace.INFORMATION,CLASS + ".toString() " + "Filter Properties:" + IPaddr + " " + IPaddr2);
}
if (IPaddr == null && IPaddr2 == null) {
print= true; // The filtering doesn't apply to this header
// If only one address is specified.
} else if(IPaddr==null) {
// If either address matches we print this record
if (src.toString().equals(IPaddr2) || dst.toString().equals(IPaddr2)) {
print= true;
}
} else if (IPaddr2 == null) {
// If either address matches we print this record
if (src.toString().equals(IPaddr) || dst.toString().equals(IPaddr)) {
print= true;
}
// Both addresses were specified
// The packet must match both addresses in any order before its
// printed
} else if (
(src.toString().equals(IPaddr) || src.toString().equals(IPaddr2))
&& (dst.toString().equals(IPaddr) || dst.toString().equals(IPaddr2))) {
print= true;
}
if (!print) { // Don't print the packet
if (Trace.isTraceOn() && Trace.isTraceInformationOn()) {
Trace.log(Trace.INFORMATION, "Not printing record");
}
return ""; // Return empty record because it didn't pass the filter
}
}
// Make the protocol a readable string instead of just a number
if (protocol == 0x3a)
nextheaders= ICMPV6;
if (protocol == 0x06)
nextheaders= TCP;
if (protocol == 0x11)
nextheaders= UDP;
if (protocol == 0x00)
nextheaders= EXTHOPHOP;
if (protocol == 0x2b)
nextheaders= EXTROUTE;
if (protocol == 0x2c)
nextheaders= EXTFRAG;
if (protocol == 0x32)
nextheaders= EXTESP;
if (protocol == 0x33)
nextheaders= EXTAH;
if (protocol == 0x3c)
nextheaders= EXTDST;
Object[] args=
{
version,
src,
dst,
hoplimit,
flowlabel,
trafficclass,
payloadlength,
nextheaders,
nextheaderh,
};
String next1= printnext(filter);
if (next1 == "") { // The header didn't pass the filter
return "";
} else {
return Formatter.jsprintf(
"\t "
+ IPV6DATA
+ " . .:"
+ " "
+ VER
+ " : {0,2,R} \t\t "
+ TRAFFICCLASS
+ ": {5} \t\t "
+ FLWLBL
+ ": {4}\n"
+ "\t\t\t "
+ PAYLOADLENGTH
+ ": {6,5,R} \t"
+ NXTHDR
+ ": {8,4,L},{7,10,L} "
+ HOPLIMIT
+ ": {3,3,R}\n"
+ "\t\t\t "
+ SRC
+ ": {1}\n"
+ "\t\t\t "
+ DST
+ ": {2}\n",
args)
+ printHexHeader()
+ next1;
}
}
/**
* Returns the version of this Header.
* @return String containing a decimal representation of the version.
*/
public String getVersion() {
return version.toString();
}
/**
* Returns the traffic class of this Header.
* @return String containing a decimal representation of the traffic class.
*/
public String getTrafficClass() {
return (new Dec(trafficclass.getData())).toString();
}
/**
* Returns the flow label of this Header.
* @return String containing a decimal representation of the flow label.
*/
public String getFlowLabel() {
return (new Dec(flowlabel.getData())).toString();
}
/**
* Returns the payload length of this Header.
* @return String containing a decimal representation of the payload length.
*/
public String getPayloadLength() {
return payloadlength.toString();
}
/**
* Returns the next header identifier.
* @return String containing a decimal representation of the next header identifier.
*/
public String getNextHeaderDec() {
return nextheader.toString();
}
/**
* Returns the hop limit of this Header.
* @return String containing a decimal representation of the hop limit.
*/
public String getHopLimit() {
return hoplimit.toString();
}
/**
* Returns the source IPv6 Address of this Header.
* @return String containing a delimited decimal representation of the source address.
*/
public String getSrcAddr() {
return src.toString();
}
/**
* Returns the destination IPv6 Address of this Header
* @return String containing a delimited decimal representation of the destination address
*/
public String getDstAddr() {
return dst.toString();
}
}