How to Get the Physical IP Address of the Client Machine

Visit the Below Website to access unlimited exam questions for all IT vendors and Get Oracle Certifications for FREE
http://www.free-online-exams.com

Problem: How to Get the Physical IP Address of the Client Machine


Solution:



The Physical IP Address is also known as MAC Address or MAC ID or Hardware Address. This can be achieved with a java program which can be implemented via a Forms PJC. This is a three step process
Create the Java Bean
1. Create a Java file "getMacAddress.java" as follows say in d:\pjc folder
import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.InetAddress;
import java.net.UnknownHostException;
import oracle.forms.ui.*;
import oracle.forms.properties.*;

public class getMacAddress extends VBean
{

public getMacAddress()
{
System.out.println("Bean has been initialised");
}

/* public static void main(String[] args)
{
String res = getAddress();
System.out.println(res);
} */

public String getAddress()
{

String macAddress = null;
String getAddress = null;

Process p = null;
BufferedReader in = null;

try {
String osname = System.getProperty("os.name");
if (osname.startsWith("Windows")) {
p = Runtime.getRuntime().exec( new String[] { "ipconfig",
"/all" }, null);

}
// Solaris code must appear before the generic code
else if (osname.startsWith("Solaris") || osname.startsWith("SunOS"))
{
String hostName = getFirstLineOfCommand(new String[] { "uname",
"-n" });
if (hostName != null) {
p = Runtime.getRuntime().exec(
new String[] { "/usr/sbin/arp", hostName }, null);
}
}
else if (new File("/usr/sbin/lanscan").exists()) {
p = Runtime.getRuntime().exec(
new String[] { "/usr/sbin/lanscan" }, null);
}
else if (new File("/sbin/ifconfig").exists()) {
p = Runtime.getRuntime().exec(
new String[] { "/sbin/ifconfig", "-a" }, null);
}

if (p != null) {
in = new BufferedReader(new InputStreamReader(
p.getInputStream()), 128);
String l = null;
while ((l = in.readLine()) != null) {
macAddress = parse(l);
if (macAddress != null && parseShort(macAddress) != 0xff)
break;
}
}

}
catch(IOException e)
{
e.printStackTrace();
}

catch(Exception e)
{
e.printStackTrace();
}

return macAddress;
}


public String parse(String in)
{
int hexStart = in.indexOf("0x");
if (hexStart != -1 && in.indexOf("ETHER") != -1) {
int hexEnd = in.indexOf(' ', hexStart);
if (hexEnd > hexStart + 2) {
return in.substring(hexStart, hexEnd);
}
}

int octets = 0;
int lastIndex, old, end;

lastIndex = in.lastIndexOf('-');

if (lastIndex > in.length() - 2) return null;

end = Math.min(in.length(), lastIndex + 3);

++octets;
old = lastIndex;
while (octets != 5 && lastIndex != -1 && lastIndex > 1) {
lastIndex = in.lastIndexOf('-', --lastIndex);
if (old - lastIndex == 3 || old - lastIndex == 2) {
++octets;
old = lastIndex;
}
}

if (octets == 5 && lastIndex > 1) {
return in.substring(lastIndex - 2, end).trim();
}
return null;
}


public short parseShort(String s) throws NullPointerException {
s = s.toLowerCase();
short out = 0;
byte shifts = 0;
char c;
for (int i = 0; i < s.length() && shifts < 4; i++) { c = s.charAt(i); if ((c > 47) && (c < 58)) { out <<= 4; ++shifts; out |= c - 48; } else if ((c > 96) && (c < 103)) { ++shifts; out <<= 4; out |= c - 87; } } return out; } public String getFirstLineOfCommand(String[] commands) throws IOException { Process p = null; BufferedReader reader = null; try { p = Runtime.getRuntime().exec(commands); reader = new BufferedReader(new InputStreamReader( p.getInputStream()), 128); return reader.readLine(); } finally { if (p != null) { if (reader != null) { try { reader.close(); } catch (IOException ex) {} } try { p.getErrorStream().close(); } catch (IOException ex) {} try { p.getOutputStream().close(); } catch (IOException ex) {} p.destroy(); } } } } 2. open a cmd prompt and go to d:\pjc folder(where the java file is stored) and do the following a) set ORACLE_HOME=d:\oracle\developersuite (substitute your physical ORACLE_HOME for Developer Suite here) b) set PATH=%ORACLE_HOME%\jdk\bin c) set CLASSPATH=%ORACLE_HOME%\forms\java\frmall.jar;d:\pjc;%CLASSPATH% 3. Compile the above java code (getMacAddress.java) using javac javac getMacAddress.java 4. Package getMacAddress.class into a jar file using jar.exe. jar -cvf getMacAddress.jar getMacAddress.class 5. Sign the getMacAddress.jar file by following the instructions in Note 202768.1 Signing a Java Bean for Deployment with Forms 9i / 10g Oracle Jinitiator using JDK 1.3 Code the Form 6. Create a simple form and add a bean area to it. 7. In the implementation class of the bean area put our class "getMacAddress" 8. Create a button with the following code in the When-Button-Pressed trigger: declare hbean1 item := find_item('block5.bean1'); begin Fbean.register_bean(hbean1,1,'getMacAddress'); :text1 := Fbean.Invoke_char(hbean1,1,'getAddress'); end; Note that this code assumes that you have a text item called "text1" and the bean area is in block5 and called "bean1". Please adjust if your naming convention is different. Deploy the Form with the Bean 9.Copy the getMacAddress.jar file into %ORACLE_HOME%/forms/java directory 10. Edit the formsweb.cfg from %ORACLE_HOME%/forms/server/forsweb.cfg Add the getMacAddress.jar to the archive,archive_jini parameters in the configuration section e.g.: [myconfig] archive=frmall.jar,getMacAddress.jar archive_jini=frmall_jinit.jar,getMacAddress.jar 11) Compile and run the form. This code will work with both JInitiator and JRE 1.6.0_X You can download a working example from -> download
Note: If the end user browser plugin is going to be JRE 1.6 + then the following, simpler, java code can be used to get the Physical address. Prior to JDK 1.6 there was no method availaable to get the hardware address of the client. However, in JDK 1.6, a new method getHardwareAddress() is available to get the hardware address. So if the JRE is going to be 1.6 or higher, then the following java source can be used
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.net.UnknownHostException;
import oracle.forms.ui.*;

public class getMacAddress extends VBean {

public String bytesText(byte in[]) {

byte ch = 0x00;
int i = 0;

if (in == null || in.length <= 0) return null; String pseudo[] = {"0", "1", "2","3", "4", "5", "6", "7", "8","9", "A", "B", "C", "D", "E","F"}; StringBuffer out = new StringBuffer(in.length * 2); while (i < in.length) { ch = (byte) (in[i] & 0xF0); ch = (byte) (ch >>> 4);
// shift the bits down

ch = (byte) (ch & 0x0F);
// must do this is high order bit is on!
out.append(pseudo[ (int) ch]);
ch = (byte) (in[i] & 0x0F);
out.append(pseudo[ (int) ch]);
out.append("-");
i++;
}

String rslt = new String(out);
return rslt.substring(0,rslt.length()-1);

}


public String getAddress()
{

String res = "none";
try {
InetAddress address = InetAddress.getLocalHost();

NetworkInterface ni = NetworkInterface.getByInetAddress(address);
byte[] mac = ni.getHardwareAddress();

res = bytesText(mac);
}
catch (UnknownHostException e) {
e.printStackTrace();
}
catch (SocketException e) {
e.printStackTrace();
}
return res;
}
}


References:
How to Get the Physical IP Address of the Client Machine [ID 853971.1]

NOTE:202768.1 - Signing a Java Bean for Deployment with Forms 9i / 10g With Oracle Jinitiator.

Get Oracle Certifications for all Exams
Free Online Exams.com