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This is the program for Implementation of Reverse Address Resolution Protocol (RARP).

Author: FariyaRahmath

RARPClient.java

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+import java.io.*;
+import java.net.*;
+public class RARPClient
+{
+	public static void main(String args[])
+	{
+		String send_msg, recv_msg=" ";
+		try
+		{
+			InetAddress ip=InetAddress.getLocalHost();
+			Socket s=new Socket(ip, 9126);
+			PrintStream ps=new PrintStream(s.getOutputStream());
+			DataInputStream dis=new DataInputStream(s.getInputStream());
+			DataInputStream d=new DataInputStream(System.in);
+			System.out.println("\n\t\t***Implementation of RARP***\n");
+			System.out.println("\nEnter the MAC Address: ");
+			send_msg=d.readLine();
+			ps.println(send_msg);
+			recv_msg=dis.readLine();
+			if (!recv_msg.equals("-1"))
+			{
+				System.out.println("\nIP Address of given MAC Address: ");
+				System.out.println(recv_msg);
+			}
+			else
+			{
+				System.out.println("Host Not Found\n");
+			}
+			ps.close();
+			s.close();
+		}catch (Exception se) {System.out.println("Exception: "+se.getMessage());}
+	}
+}

RARPServer.java

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+import java.io.*;
+import java.net.*;
+public class RARPServer
+{
+	public static void main(String args[])
+	{
+		String IP_Address[]={"192.168.100.1", "192.168.200.1", "192.168.300.1", "192.168.400.1", "192.168.500.1"};
+		String MAC_Address[]={"57-H348-B2AQ01JY-6", "93X-H64L-42AM-WHKY-4", "IOV-JK48-2TAB-BEJY-8", "89X-IOZ8-6ZLB-DHJY-3", "XJH-4U18-3IAP-BPYS-7"};
+		String send_msg, recv_msg=" ";
+		System.out.println("\n\t\t***Implementation of RARP***\n");
+		try
+		{
+			ServerSocket ss=new ServerSocket(9126);
+			System.out.println("\nServer started: "+ss);
+			Socket s=ss.accept();
+			DataInputStream dis=new DataInputStream(s.getInputStream());
+			DataInputStream d=new DataInputStream(System.in);
+			PrintStream ps=new PrintStream(s.getOutputStream());
+			recv_msg=dis.readLine();
+			System.out.println("\nRequest received is: "+recv_msg);
+			int host_found=-1;
+			for (int i=0; i<5; i++)
+			{
+				if (MAC_Address[i].equals(recv_msg))
+				host_found=i;
+			}
+			if (host_found!=-1)
+			ps.println(IP_Address[host_found]);
+			else
+			ps.println(host_found);
+			ps.close();
+			s.close();
+		}catch (Exception se) {System.out.println("Server Socket Problem "+se.getMessage());}
+	}
+}