SOURCE CODE OF BUILDING A LINUX IPV6 DNS SERVER

Building a Linux IPv6 DNS Server

/*Loading .sh (Shell Script) */

putChar()

{

i=1

while [ $i -le $3 ]

do

echo -n "$1"

sleep $2

i=`expr $i + 1`

done

}

clear

echo

putChar _ 0 80

echo -e "\n"

echo " !!! Loading System Details"

echo -ne "\n\t\tit may take few seconds "

sleep 1

putChar '.' 0.25 20

putChar '.' 0 20

putChar _ 0 80

sleep 1

echo -ne "\n\n\n\t--> Checking system details "

putChar '.' 0.5 8

Page 54


echo -e "\n\n\t\t-- Machine (hardware) type : ùname -m`"

sleep 2

echo -e "\t\t-- Machine's network hostname : ùname -n`"

sleep 1

echo -e "\t\t-- Operating system release : ùname -r`"

sleep 0.5

echo -e "\t\t-- Operating system name : ùname -s`"

sleep 0.5

echo -e "\t\t-- Host processor type : ùname -p`"

sleep 0.25

echo -e "\t\t-- Operating system version : ùname -v`"

sleep 1

echo -ne "\n\n\t--> Checking for root user privilege "

putChar '.' 0.5 6

sleep 1

if [ "`whoami`" != "root" ]

then

echo -e "\n\n\t\t-- Sorry this software has to be run by root user....\n\n"

sleep 2

echo -e "\n\t\tAborting.......";

sleep 5

exit

else

sh run.sh

echo -e "\n\n\t\t-- found root user privileges !"

sleep 1

Page 55


echo -ne "\n\n\t\t\t\t\t\t\t\t "

putChar '->' 0.25 5

sleep 1

echo -e "\n"

fi

/* Builder.c [C source File] */

#include <unistd.h>

#include <stdio.h>

#include <dirent.h>

#include <string.h>

#include <sys/stat.h>

#include <stdlib.h>

void printChar(char c, int count) {

int i;

for(i=0; i<count; i++)

printf("%c", c);

printf("\n");

} // end printChar

void bu()

{

system("sh built.sh");

}

void Builder() {

char ans, dirName[260];

Page 56


char dir,command[260];

FILE *fp = fopen("SourceDir", "r");

fscanf(fp, "%s", dirName);

fclose(fp);

printf("Enter the Dir. Name Default is '%s' is it o.k (y/n): ", dirName);

scanf(" %c", &dir);

if(dir == 'y') {

printf("Ensure that U have copied the source files..");

printf("Shall I Proceed...(y/n): ");

scanf(" %c", &ans);

if(ans == 'y') {

chdir(dirName);

// system("cp -rf /usr/src/linux-2.4.21-4.EL/arch/i386/defconfig /usr/src/linux-

2.4.21-4.EL/arch/i386/defconfig.org");

printChar('/',79);

printChar('/',79);

printf("\n");

printf("Press Any key to proceed with cleaning...");

getchar();

getchar();

printChar('/',79);

printChar('/',79);

system("sleep 40");

printf("\n");

printf("Press Any key to proceed with kernel image creation...");

getchar();

/* system("make bzImage &> /dev/zero");*/

Page 57


bu();

system("sleep 60");

printChar('*', 79);

printChar('*', 79);

printChar('*', 79);

//strcpy(command,"cp /Project/ntfssupportedkernel arch/i386/boot/bzImage");

//system(command);

printf("\nProcess Completed Successfully!!!\n\n");

}

} else {

printf("Enter the directory Name: ");

scanf("%s", dirName);

printf("Ensure that U have copied the source files..");

printf("Shall I Proceed...(y/n): ");

scanf(" %c", &ans);

printf("ans is %c\n", ans);

if(ans == 'y') {

chdir(dirName);

system("make dep &> /dev/zero");

// system("make dep | tee .o; ./.s");

printChar('/',79);

printChar('/',79);

printf("\n");

printf("Press Any key to proceed with cleaning...");

getchar();

getchar();

system("sleep 60");

8


printChar('/',79);

printChar('/',79);

printf("\n");

printf("Press Any key to proceed with kernel image creation...");

getchar();

printChar('/',79);

printChar('/',79);

printf("\n");

//system("sleep 60");

printChar('*', 79);

system(command);

printChar('*', 79);

printf("Process Completed Successfully!!!\n\n");

}

}

} // end Builder

int main() {

Builder();

} // end main

/* Dir Handler.c [C source File] */#include <unistd.h>

#include <stdio.h>

#include <dirent.h>

#include <string.h>

#include <sys/stat.h>

#include <stdlib.h>

void PrintDir(char *dirName, int depth) {

Page 59


DIR *dp;

struct dirent *entry;

struct stat statbuf;

if((dp = opendir(dirName)) == NULL) {

fprintf(stderr, "Cann't open Directory: %s\n", dirName);

return;

}

chdir(dirName);

while((entry = readdir(dp)) != NULL) {

lstat(entry->d_name, &statbuf);

if(S_ISDIR(statbuf.st_mode)) {

/* ignore . and .. */

if(strcmp(".", entry->d_name) == 0 || strcmp("..", entry->d_name)==0)

continue;

printf("%s/\n", entry->d_name);

} // end if

} // end while

} // end PrintDir

void DirHandler() {

FILE *fp = fopen("SourceDir", "w");

char dirName[81];

char command[200];

char cmd[250];

char srcName[260], destName[260];

char pro;

char defDir[] = "/usr/src/";

char srcRel[50], destRel[50];

Page 60


printf("Enter the Dir To be scanned: ");

scanf("%s", dirName);

PrintDir(dirName, 0);

printf("\n\n... That's all folks...\n");

printf("The default dir is '%s' Shall I proceed? (y/n): ", defDir);

scanf(" %c", &pro);

if(pro == 'n') {

printf("Enter the Directory U want to be backed up: ");

scanf("%s", srcName);

printf("Now Enter the Directory name U want the sources to be in: ");

scanf("%s", destName);

command[0]='\0';

strcat(command, "cp -r ");

strcat(command, srcName);

strcat(command, " ");

strcat(command, destName);

cmd[0] = '\0';

strcat(cmd, command);

printf("\n Command %s",cmd);

printf("\nPress any key to go ahead with backup....");

printf("This process may take several minutes... pls. wait....");

/* getchar();

getchar();

printf("\n Command %s ", command);*/

getchar();

system(command);


Page 61


} else {

printf("Enter the Directory U want to be backed up: ");

scanf("%s", srcRel);

srcName[0]='\0';

strcpy(srcName, defDir);

strcat(srcName, srcRel);

printf("Now Enter the Directory name U want the sources to be in: ");

scanf("%s", destRel);

strcpy(destName, defDir);

strcat(destName, destRel);

command[0]='\0';

strcat(command, "cp -r ");

strcat(command, srcName);

strcat(command, " ");

strcat(command, destName);

printf("\nPress any key to go ahead with backup....");

printf("This process may take several minutes... pls. wait....");

getchar();

getchar();

system(command);


}

fprintf(fp, "%s", destName);

fclose(fp);

} // end DirHandler

Page 62


int main() {

DirHandler();

}

/* MemberAdderGUI (Server Side) */

import java.net.*;

import java.awt.*;

import java.util.*;

import javax.swing.*;

import java.awt.event.*;

public class MemberAdderGUI extends JFrame

{

ServerSocket serverSocket;

int DEFAULT_PORT=111;

int port;

Vector membersList;

JFrame frame;

TextField tfStatus;

Container c;

JPanel pnlPortInfo;

JTextField jtfPort;

JButton btnAction;

java.awt.List lstMembers;

String strBtnCaption = "";

Thread memberAdder;

Page 63


public MemberAdderGUI(String title)

{

super(title);

membersList = new Vector();

frame = this;

c = getContentPane();

strBtnCaption = "Start";

pnlPortInfo = new JPanel();

pnlPortInfo.setLayout(new BorderLayout());

pnlPortInfo.add("West", new JLabel("Port: "));

pnlPortInfo.add("Center", jtfPort = new JTextField(7));

pnlPortInfo.add("East", btnAction = new JButton(strBtnCaption));

btnAction.addActionListener(new Axn());

c.add("North", pnlPortInfo);

c.add("Center", lstMembers = new java.awt.List(7));

c.add("South", tfStatus = new TextField());

setDefaultCloseOperation(DISPOSE_ON_CLOSE);

setSize(300, 300);

setLocation(70, 70);

setVisible(true);

}

public MemberAdderGUI(int port)

{

this.port = port;

membersList = new Vector();

}

Page 64


class MemberAdder implements Runnable

{

public void run()

{

try

{

serverSocket = new ServerSocket(port);

System.out.println("Member Adder started and waiting...at '" + port + "'..!!");

Socket clientSocket = null;

while(true)

{

clientSocket = serverSocket.accept();

System.out.println("Connected to machine: " + clientSocket);

String ipAddress = clientSocket.getInetAddress().getHostAddress();

clientSocket.close();

addMember(ipAddress);

printMembers();

}

}

catch(Exception e)

{

}

} // end run

} // end MemberAdder

public void addMember(String ipAddress)

{

Page 65


if(!membersList.contains(ipAddress))

{

membersList.add(ipAddress);

lstMembers.add(ipAddress);

tfStatus.setText("Added '" + ipAddress + "' Successfully!!");

}

else

{

System.out.println("\"" + ipAddress + "\" has been added already!!!");

tfStatus.setText("\"" + ipAddress + "\" has been added already!!!");

}

}

public void printMembers()

{

System.out.println("\n\nList of Available members is..\n");

Enumeration list = membersList.elements();

while(list.hasMoreElements())

{

System.out.println((String)list.nextElement());

}

System.out.println("-----------------------that's all-----------------------");

}

class Axn implements ActionListener

{

public void actionPerformed(ActionEvent ae)

{

Page 66


String strCommand = ae.getActionCommand();

try

{

if(strCommand.equals("Start"))

{

strBtnCaption = "Stop";

btnAction.setText(strBtnCaption);

if(jtfPort.getText().equals(""))

{

port = DEFAULT_PORT;

}

else

{

port = Integer.parseInt(jtfPort.getText());

}

if(memberAdder == null)

{

memberAdder = new Thread(new MemberAdder());

memberAdder.start();

}

else

{

memberAdder = null;

System.gc();

}

}

Page 67


else if(strCommand.equals("Stop"))

{

strBtnCaption = "Start";

btnAction.setText(strBtnCaption);

serverSocket.close();

serverSocket = null;

System.gc();

}

}

catch(Exception e)

{

System.out.println("MemberAdderGUI: Axn: " + e);

} // end try-catch

} // end action

} // end Axn

public static void main(String [] args)

{

new MemberAdderGUI("Member List");

}

} // end MemberAdderGUI

/* AddMeAsMemberGUI (Client Side)*/

import java.io.*;

import java.net.*;

Page 68


import java.awt.*;



public class AddMeAsMemberGUI extends JFrame

{

String host;

int port;

JTextField jtfHost, jtfPort;

JPanel pnlHostInfo, pnl1, pnl2, pnlActions;

JFrame frame;

Container c;

JButton btnRegister, btnClose;

public AddMeAsMemberGUI(String title)

{


setTitle(title);

frame = this;

pnlHostInfo = new JPanel();

pnlHostInfo.setLayout(new BorderLayout());

pnl1 = new JPanel();

pnl1.setLayout(new GridLayout(2, 1));

pnl1.add(jtfHost = new JTextField(15));

pnl1.add(jtfPort = new JTextField(15));



pnl2.add(new JLabel("Host: "));

Page 69


pnl2.add(new JLabel("Port: "));

pnlActions = new JPanel();

pnlActions.setLayout(new GridLayout(1, 2));

pnlActions.add(btnRegister = new JButton("Register"));

btnRegister.addActionListener(new Axn());

pnlActions.add(btnClose = new JButton("Close"));

btnClose.addActionListener(new Axn());

pnlHostInfo.add("Center", pnl1);

pnlHostInfo.add("West", pnl2);

pnlHostInfo.add("South", pnlActions);

c.add("Center", pnlHostInfo);


setSize(200, 110);


setVisible(true);

} // end cons

class AddMe implements Runnable

{

public void run() {

try

{

Socket clientSocket = new Socket(host, port);

}

catch(Exception e)

{

System.out.println("AddMe: Axn: " + e);

Page 70


}

} // end run

} // end AddMe

public class Axn implements ActionListener

{


{

String strCmd = ae.getActionCommand();

if(strCmd.equals("Register"))

{

host = jtfHost.getText();


new Thread(new AddMe()).start();

}

else if(strCmd.equals("Close"))

{

frame.dispose();

}

}

} // end Axn


{

new AddMeAsMemberGUI("Add Me As MEMBER");

}

} // end AddMeAsMemberGUI

Page 71


/* LookUp Server GUI (Server Side) */

import java.io.*;

import java.net.*;

import java.awt.*;



public class LookUpServerGUI extends JFrame

{

ServerSocket serverSok;

JButton btnStart, btnStop;

JTextField jtfPort;

JPanel pnlActions, pnlPortInfo;

boolean stopServer;

Thread lookupSvr;

Container c;

public LookUpServerGUI(String title)

{

super(title);


pnlPortInfo = new JPanel();

pnlPortInfo.setLayout(new GridLayout(1, 2));

pnlPortInfo.add(new JLabel("Port: "));

pnlPortInfo.add(jtfPort = new JTextField(4));

Page 72




pnlActions.add(btnStart = new JButton("Start"));

pnlActions.add(btnStop = new JButton("Stop"));

btnStart.addActionListener(new Axn());

btnStop.addActionListener(new Axn());

c.add("North", pnlPortInfo);

c.add("Center", pnlActions);

setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

setSize(100, 100);


setVisible(true);

} // end cons

class LookupServer implements Runnable

{

public void run()

{

try

{

int port;

stopServer = false;

String strPort = jtfPort.getText();

if(!strPort.equals(""))

{

port = Integer.parseInt(strPort);

}

Page 73


else

{

port = 1234;

}

If (serverSok == null)

{

serverSok = new ServerSocket(port);

}

else

{

; // do NOTHING

}

while(stopServer == false)

{

System.out.println("Waiting....at '" + port + "'");

Socket clientSok = serverSok.accept();

System.out.println("Connected to: " + clientSok);

PrintWriter toClient = new PrintWriter(clientSok.getOutputStream(), true);

toClient.println("Active");

toClient.flush();

clientSok.close();

} // end while

}

catch(Exception e)

{

System.out.println("LookupServer: " + e);

Page 74


}

} // end run

}


{


{


try

{

if(strCmd.equals("Start"))

{

if(lookupSvr == null)

{

lookupSvr = new Thread(new LookupServer());

lookupSvr.start();

}

else

{

System.out.println("Already Running!!!!");

}

}

else if(strCmd.equals("Stop"))

{

stopServer = true;

Page 75


serverSok.close();

serverSok = null;

lookupSvr = null;

System.gc();

System.out.println("Stopped!!");

} // end if

}

catch(Exception e)

{

System.out.println(e);

} // end try-catch

} // end action

} // end Axn


{

new LookUpServerGUI("Lookup Server");

}

} // end LookUpServerGUI

/* LookUpClientGUI */

import java.io.*;

import java.net.*;

import java.awt.*;



Page 76


public class LookUpClientGUI extends JFrame

{

String host;

int port;

JTextField jtfHost, jtfPort;

JPanel pnlHostInfo, pnl1, pnlActions;

JFrame frame;

Container c;

TextField tfStatus;

JButton btnLookup, btnClose;

public LookUpClientGUI(String title)

{


setTitle(title);

frame = this;

pnlHostInfo = new JPanel();

pnlHostInfo.setLayout(new BorderLayout());



pnl1.add(new JLabel("Host: "));

pnl1.add(jtfHost = new JTextField(15));

pnl1.add(new JLabel("Port: "));

pnl1.add(jtfPort = new JTextField(15));


Page 77



pnlActions.add(btnLookup = new JButton("Lookup"));

btnLookup.addActionListener(new Axn());



pnlHostInfo.add("Center", pnl1);

pnlHostInfo.add("South", pnlActions);

c.add("Center", pnlHostInfo);

c.add("South", tfStatus = new TextField());


setSize(200, 135);


setVisible(true);

} // end cons


{


{


if(strCmd.equals("Lookup"))

{

host = jtfHost.getText();


new Thread(new LookupClient()).start();

}

else if(strCmd.equals("Close"))

Page 78


{

frame.dispose();

}

}

} // end Axn

public void run()

{

try

{

Socket clientSok = new Socket(host, port);

BufferedReader fromServer = new BufferedReader(new

InputStreamReader(clientSok.getInputStream()));

String answer = fromServer.readLine();

if(answer.equals("Active"))

{

System.out.println("The Server is active...");

tfStatus.setText("The Server is ACTIVE...");

}

}

catch(Exception e)

{

System.out.println("Exception has come the server seems to be NOT

ACTIVE..");

tfStatus.setText("server seems to be NOT ACTIVE..");

} // end try-catch

} // end run

} // end LookupClient

Page 79



{

new LookUpClientGUI("Lookup Client");

}

} // end LookUpClientGUI

/* DNSmain (Server Side) */

import java.awt.*;



public class DNSmain extends JFrame

{

JMenuBar mbar;

JMenu mnuDNS, mnuHelp;

JMenuItem jmi;

JFrame frame;

Container c;

JDesktopPane jdp;

public DNSmain(String title)

{

super(title);

frame = this;


Page 80


jdp = new JDesktopPane();

c.add(jdp);

mbar = new JMenuBar();

mnuDNS = new JMenu("DNS");

jmi = new JMenuItem("Control Panel", 'C');

jmi.setAccelerator(KeyStroke.getKeyStroke('C',

java.awt.event.InputEvent.ALT_MASK));

jmi.addActionListener(new Axn());

mnuDNS.add(jmi);

mnuDNS.addSeparator();

jmi = new JMenuItem("IPv6 Address", 'I');

jmi.setAccelerator(KeyStroke.getKeyStroke('I',



mnuDNS.add(jmi);

jmi = new JMenuItem("IPv4 Address", 'A');

jmi.setAccelerator(KeyStroke.getKeyStroke('A',



mnuDNS.add(jmi);

mnuDNS.addSeparator();

jmi = new JMenuItem("Exit", 'X');

jmi.setAccelerator(KeyStroke.getKeyStroke('X',



mnuDNS.add(jmi);

mnuHelp = new JMenu("Help");

Page 81


jmi = new JMenuItem("Contents", 'C');

jmi.setAccelerator(KeyStroke.getKeyStroke('C',



mnuHelp.add(jmi);

jmi = new JMenuItem("Search...", 'S');

jmi.setAccelerator(KeyStroke.getKeyStroke('S',



mnuHelp.add(jmi);

mnuHelp.addSeparator();

jmi = new JMenuItem("About", 'A');

jmi.setAccelerator(KeyStroke.getKeyStroke('A',



mnuHelp.add(jmi);

mbar.add(mnuDNS);

mbar.add(mnuHelp);

setJMenuBar(mbar);

setDefaultCloseOperation(0);

addWindowListener(new WinLstner());


setSize(600, 500);

setVisible(true);

} // end cons


Page 82


{


{

String cmdString = ae.getActionCommand();

if(cmdString.equals("Exit"))

{

int result = JOptionPane.showConfirmDialog(frame, "Do you Really want

to quit?",

"Quitting?", JOptionPane.YES_NO_CANCEL_OPTION,

JOptionPane.QUESTION_MESSAGE);

if(result == JOptionPane.YES_OPTION)

frame.dispose();

}

else if(cmdString.equals("Control Panel"))

{

JInternalFrame jif = new DNSpanelIF("DNS panel");

jdp.add(jif);

}

else if(cmdString.equals("IPv6 Address"))

{

JInternalFrame jif = new Ipv6RecordAdderIF("IPv6 DNS Records");

jdp.add(jif);

}

else if(cmdString.equals("IPv4 Address"))

{

JInternalFrame jif = new Ipv4RecordAdderIF("IPv4 DNS Records");

jdp.add(jif);

Page 83


}

} // end action

} // end Axn

class WinLstner extends WindowAdapter

{

public void windowClosing(WindowEvent we)

{

int result = JOptionPane.showConfirmDialog(frame, "Do you Really want

to quit?",

"Quitting?", JOptionPane.YES_NO_CANCEL_OPTION,

JOptionPane.QUESTION_MESSAGE);

if(result == JOptionPane.YES_OPTION)

frame.dispose();

}

} // end WinLstner


{

new DNSmain("IPv6 ready DNS");

} // end main

} // end DNSmain

/* DNShandler */

import java.io.*;

public class DNShandler

Page 84


{

public void startDNS()

{

try

{

Runtime r = Runtime.getRuntime();

Process p = r.exec("service named start");

BufferedReader br = new BufferedReader(new

InputStreamReader(p.getInputStream()));

String line = "";

while((line = br.readLine()) != null)

System.out.println(line);

}

catch(Exception e)

{

System.out.println("startDNS:: " + e);

}

}

public void stopDNS()

{

try

{


Process p = r.exec("service named stop");



Page 85


String line = "";



}

catch(Exception e)

{

System.out.println("stopDNS:: " + e);

}

}

public void reloadDNS()

{

try

{


Process p = r.exec("service named reload");



String line = "";



}

catch(Exception e)

{

System.out.println("reloadDNS:: " + e);

}

}

Page 86



{

new DNShandler().reloadDNS();

} // end main

} // end DNShandler

/* DNS Panel (Server side) */

import java.awt.*;



public class DNSpanel extends JFrame

{

JPanel pnlActions;

JButton btnStart, btnStop, btnRestart, btnClose;

JFrame frame;

Container c;

public DNSpanel(String title)

{

super(title);


frame = this;



Page 87




pnlActions.add(btnRestart = new JButton("Restart"));




btnRestart.addActionListener(new Axn());


c.add(pnlActions);


setSize(200, 100);

setVisible(true);

} // end DNspanel


{


{



{

new DNShandler().startDNS();

}


{

new DNShandler().stopDNS();

}

Page 88


else if(strCommand.equals("Restart"))

{


}

else if(strCommand.equals("Close"))

{

frame.dispose();

}

} // end action

} // end Axn


{

new DNSpanel("DNS panel");

} // end main

} // end DNSpanel

/* DNS panel IF (Internal Frame) */

import java.awt.*;



public class DNSpanelIF extends JInternalFrame

{

JPanel pnlActions;

JButton btnStart, btnStop, btnRestart, btnClose;

Page 89


JInternalFrame frame;

Container c;

public DNSpanelIF(String title)

{

super(title);


frame = this;





pnlActions.add(btnRestart = new JButton("Restart"));




btnRestart.addActionListener(new Axn());


c.add(pnlActions);

setClosable(true);

setResizable(true);

setMaximizable(true);

setIconifiable(true);


setSize(200, 100);

setVisible(true);

} // end DNspanel

Page 90



{


{



{

new DNShandler().startDNS();

}


{

new DNShandler().stopDNS();

}

else if(strCommand.equals("Restart"))

{


}

else if(strCommand.equals("Close"))

{

frame.dispose();

}

} // end action

} // end Axn


{

new DNSpanelIF("DNS panel");

Page 91


} // end main

} // end DNSpanelIF

/* Ipv4RecordAdder */

import java.io.*;

import java.net.*;

import java.awt.*;



public class Ipv4RecordAdder extends JFrame

{

String zoneFileName;

String dnsDirectory = "/var/named/"; // DEFAULT DIRECTORY

JTextField jtfDomainName, jtfHostName, jtfAddress;

JButton btnAdd, btnClose;

JPanel pnlActions, pnlCenter;

JFrame frame;

Container c;

public Ipv4RecordAdder(String title)

{

super(title);

frame = this;


pnlCenter = new JPanel();

pnlCenter.setLayout(new GridLayout(3, 2));

Page 92


pnlCenter.add(new JLabel("Domain Name : "));

pnlCenter.add(jtfDomainName = new JTextField());

pnlCenter.add(new JLabel("Host Name : "));

pnlCenter.add(jtfHostName = new JTextField());

pnlCenter.add(new JLabel("IPv4 Address: "));

pnlCenter.add(jtfAddress = new JTextField());



pnlActions.add(btnAdd = new JButton("Add"));


btnAdd.addActionListener(new Axn());


c.add("Center", pnlCenter);

c.add("South", pnlActions);



setSize(280, 150);

setVisible(true);

} // end cons


{


{


try

{

Page 93


if(cmdString.equals("Add"))

{

String domainName = jtfDomainName.getText();

String zoneFileName = dnsDirectory + domainName + ".zone";

String hostName = jtfHostName.getText();

String ipAddress = jtfAddress.getText();

PrintWriter zoneFile = new PrintWriter(new

FileOutputStream(zoneFileName, true));

zoneFile.println(hostName + "\tIN\tA\t" + ipAddress);

System.out.println("Record Added Successfully!!!!");

// Clear the TextFields

jtfDomainName.setText("");

jtfHostName.setText("");

jtfAddress.setText("");

zoneFile.close();

}

else if(cmdString.equals("Close"))

{

frame.dispose();

}

}

catch(Exception e)

{

System.out.println("Ipv4 Add: " + e);

} // end try-catch

} // end action

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} // end Axn


{

new Ipv4RecordAdder("IPv4 Record Adder..");

} // end main

} // end Ipv4RecordAdder

/* Ipv4RecordAdderIF (Internal Frame) */

import java.io.*;

import java.net.*;

import java.awt.*;



public class Ipv4RecordAdderIF extends JInternalFrame

{







Container c;

public Ipv4RecordAdderIF(String title)

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{

super(title);

frame = this;



















setClosable(true);

setResizable(true);




setSize(280, 150);

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setVisible(true);

} // end cons


{


{


try

{


{







zoneFile.println(hostName + "\tIN\tA\t" + ipAddress);






zoneFile.close();

}

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{

frame.dispose();

}

}

catch(Exception e)

{


} // end try-catch

} // end action

} // end Axn


{

new Ipv4RecordAdderIF("IPv4 Record Adder..");

} // end main

} // end Ipv4RecordAdderIF

/* Ipv6RecordAdder */

import java.io.*;

import java.net.*;

import java.awt.*;



public class Ipv6RecordAdder extends JFrame

{

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J Button btnAdd, btnClose;


JFrame frame;

Container c;

public Ipv6RecordAdder(String title)

{

super(title);

frame = this;
















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setSize(280, 150);

setVisible(true);

} // end cons


{


{


try

{


{







zoneFile.println(hostName + "\t\tIN\tAAAA\t" + ipAddress);



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zoneFile.close();

}


{

frame.dispose();

}

}

catch(Exception e)

{


} // end try-catch

} // end action

} // end Axn


{

new Ipv6RecordAdder("IPv6 Record Adder..");

} // end main

} // end Ipv6RecordAdder

/* Ipv6RecordAdderIF (Internal Frame) */

import java.io.*;

import java.net.*;

import java.awt.*;

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public class Ipv6RecordAdderIF extends JInternalFrame

{







Container c;

public Ipv6RecordAdderIF(String title)

{

super(title);

frame = this;










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setClosable(true);

setResizable(true);





setSize(280, 150);

setVisible(true);

} // end cons


{


{


try

{


{

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zoneFile.println(hostName + "\t\tIN\tAAAA\t" + ipAddress);






zoneFile.close();

}


{

frame.dispose();

}

}

catch(Exception e)

{


} // end try-catch

} // end action

} // end Axn

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{

new Ipv6RecordAdderIF("IPv6 Record Adder..");

} // end main

} // end Ipv6RecordAdderIF

/* Address Handler (Server Side) */

import java.io.*;

import java.net.*;

public class AddressHandler

{

public AddressHandler()

{

try

{

//

System.out.println(Inet6Address().numericToTextForm

at()); ServerSocket sok = new

ServerSocket(2995);

System.out.println("Server Ready!!!");

Socket client = sok.accept();

System.out.println(client);


InputStreamReader(client.getInputStream()));

String line = br.readLine();

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System.out.println("Client has sent..." + line);

}

catch(Exception e)

{


} // end try-catch

} // end cons


{

new AddressHandler();

}

}

/* Client (Client Side) */

import java.io.*;

import java.net.*;

public class Client

{

public Client(String host, int port)

{

try

{

System.out.println(Inet6Address().numericToTextFormat());

Socket sok = new Socket(host, port);

System.out.print("Enter some text: ");

String line = new BufferedReader(new

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InputStreamReader(System.in)).readLine();

PrintWriter out = new PrintWriter(sok.getOutputStream());

out.println(line);

out.flush();

}

catch(Exception e)

{


} // end try-catch

} // end cons


{

new Client(args[0], Integer.parseInt(args[1]));

}

}

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/* A Typical view of Named.conf Configuration file */

## named.conf - configuration for bind

#

# Generated automatically by redhat-config-bind, alchemist et al.

# Any changes not supported by redhat-config-bind should be put

# in /etc/named.custom

#

controls {

inet 127.0.0.1 allow { localhost; } keys { rndckey; };

};

include "/etc/named.custom";

include "/etc/rndc.key";

#options {

# listen-on-v6 { any; };

#};

zone "localhost" {

type master;

file "localhost.zone";

};

zone "mahendra.com" {

type master;

file "mahendra.com.zone";

};

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/* A Typical view of mahendra.com.zone Configuration file */

$TTL 86400

@ IN SOA localhost. root.localhost (

5 ; serial

28800 ; refresh

7200 ; retry

604800 ; expire

86400 ; ttl

)

IN NS localhost.

sky IN MX 1 192.168.5.1

sky IN A 192.168.5.1

mahendra.com IN CNAME admin.mahendra.com.

host1 IN AAAA fe80::200:1cff:fe81:e1d0

redhat1 IN AAAA fe80::200:1cff:fe81:e1d0

penguin IN AAAA fe80::200:1cff:fe81:e1d0

node 2 IN A 192.168.5.4

node 1 IN A 192.168.5.3

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SOURCE CODE OF BUILDING A LINUX IPV6 DNS SERVER

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