DNSAddressRequestTest.java

/*******************************************************************************
 * This file is part of OpenNMS(R).
 *
 * Copyright (C) 2008-2011 The OpenNMS Group, Inc.
 * OpenNMS(R) is Copyright (C) 1999-2011 The OpenNMS Group, Inc.
 *
 * OpenNMS(R) is a registered trademark of The OpenNMS Group, Inc.
 *
 * OpenNMS(R) is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published
 * by the Free Software Foundation, either version 3 of the License,
 * or (at your option) any later version.
 *
 * OpenNMS(R) is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with OpenNMS(R).  If not, see:
 *      http://www.gnu.org/licenses/
 *
 * For more information contact:
 *     OpenNMS(R) Licensing <license@opennms.org>
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package org.opennms.protocols.dns;

import java.io.IOException;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.List;

import junit.framework.TestCase;
import org.junit.Before;
import org.junit.Test;

public class DNSAddressRequestTest extends TestCase {

    private static final byte[] normalResponseBytes = new byte[] {
        (byte) 0x9e, (byte) 0xf2, (byte) 0x81, (byte) 0x80,
        (byte) 0x00, (byte) 0x01, (byte) 0x00, (byte) 0x01,
        (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00,
        (byte) 0x09, (byte) 0x6c, (byte) 0x6f, (byte) 0x63,
        (byte) 0x61, (byte) 0x6c, (byte) 0x68, (byte) 0x6f,
        (byte) 0x73, (byte) 0x74, (byte) 0x00, (byte) 0x00,
        (byte) 0x01, (byte) 0x00, (byte) 0x01, (byte) 0xc0,
        (byte) 0x0c, (byte) 0x00, (byte) 0x01, (byte) 0x00,
        (byte) 0x01, (byte) 0x00, (byte) 0x0a, (byte) 0x00,
        (byte) 0x00, (byte) 0x00, (byte) 0x04, (byte) 0x7f,
        (byte) 0x00, (byte) 0x00, (byte) 0x01
    };
    
    private static final byte[] servFailResponseBytes = new byte[] {
        (byte) 0x5e,
        (byte) 0x94,
        (byte) 0x81,
        (byte) 0x82,
        (byte) 0x00,
        (byte) 0x01,
        (byte) 0x00,
        (byte) 0x00,
        (byte) 0x00,
        (byte) 0x00,
        (byte) 0x00,
        (byte) 0x00,
        (byte) 0x06,
        (byte) 0x67,
        (byte) 0x72,
        (byte) 0x65,
        (byte) 0x67,
        (byte) 0x6f,
        (byte) 0x72,
        (byte) 0x03,
        (byte) 0x63,
        (byte) 0x6f,
        (byte) 0x6d,
        (byte) 0x00,
        (byte) 0x00,
        (byte) 0x01,
        (byte) 0x00,
        (byte) 0x01      
    };
    
    private static final byte[] nxDomainResponseBytes = new byte[] {
        (byte) 0x2f, (byte) 0x3e, (byte) 0x81, (byte) 0x83,
        (byte) 0x00, (byte) 0x01, (byte) 0x00, (byte) 0x00,
        (byte) 0x00, (byte) 0x01, (byte) 0x00, (byte) 0x00,
        (byte) 0x09, (byte) 0x6c, (byte) 0x6f, (byte) 0x63,
        (byte) 0x61, (byte) 0x6c, (byte) 0x68, (byte) 0x6f,
        (byte) 0x73, (byte) 0x74, (byte) 0x00, (byte) 0x00,
        (byte) 0x01, (byte) 0x00, (byte) 0x01, (byte) 0x00,
        (byte) 0x00, (byte) 0x06, (byte) 0x00, (byte) 0x01,
        (byte) 0x00, (byte) 0x01, (byte) 0x3f, (byte) 0x0a,
        (byte) 0x00, (byte) 0x40, (byte) 0x01, (byte) 0x41,
        (byte) 0x0c, (byte) 0x52, (byte) 0x4f, (byte) 0x4f,
        (byte) 0x54, (byte) 0x2d, (byte) 0x53, (byte) 0x45,
        (byte) 0x52, (byte) 0x56, (byte) 0x45, (byte) 0x52,
        (byte) 0x53, (byte) 0x03, (byte) 0x4e, (byte) 0x45,
        (byte) 0x54, (byte) 0x00, (byte) 0x05, (byte) 0x4e,
        (byte) 0x53, (byte) 0x54, (byte) 0x4c, (byte) 0x44,
        (byte) 0x0c, (byte) 0x56, (byte) 0x45, (byte) 0x52,
        (byte) 0x49, (byte) 0x53, (byte) 0x49, (byte) 0x47,
        (byte) 0x4e, (byte) 0x2d, (byte) 0x47, (byte) 0x52,
        (byte) 0x53, (byte) 0x03, (byte) 0x43, (byte) 0x4f,
        (byte) 0x4d, (byte) 0x00, (byte) 0x77, (byte) 0xce,
        (byte) 0x7e, (byte) 0xe0, (byte) 0x00, (byte) 0x00,
        (byte) 0x07, (byte) 0x08, (byte) 0x00, (byte) 0x00,
        (byte) 0x03, (byte) 0x84, (byte) 0x00, (byte) 0x09,
        (byte) 0x3a, (byte) 0x80, (byte) 0x00, (byte) 0x01,
        (byte) 0x51, (byte) 0x80
    };
    
    private DNSAddressRequest m_request;

    @Before
    public void setUp() throws UnknownHostException {
        final String question = InetAddress.getLocalHost().getCanonicalHostName();
        m_request = new DNSAddressRequest(question);
    }

    @Test
    public void testNormalResponse() throws Exception {
        m_request.m_reqID = 0x9ef2;
        m_request.verifyResponse(normalResponseBytes, normalResponseBytes.length);
        
        m_request.receiveResponse(normalResponseBytes, normalResponseBytes.length);
        assertEquals(1, m_request.getAnswers().size());
        DNSAddressRR answer = (DNSAddressRR) m_request.getAnswers().get(0);
        assertEquals(4, answer.getAddress().length);
        assertEquals(127, answer.getAddress()[0]);
        assertEquals(0, answer.getAddress()[1]);
        assertEquals(0, answer.getAddress()[2]);
        assertEquals(1, answer.getAddress()[3]);
    }
    
    @Test
    public void testServerFailed() throws Exception {
        m_request.m_reqID = 24212;
        try {
            m_request.verifyResponse(servFailResponseBytes, servFailResponseBytes.length);            
        } catch (IOException ioe) {
            assertEquals("Server Failure (2)", ioe.getMessage());
            return;
        }
        throw new Exception("Should have caught an IOException for ServFail!");
    }
    
    @Test
    public void testNxDomainPass() throws Exception {
        List<Integer> fatalCodes = new ArrayList<Integer>();
        fatalCodes.add(2);
        fatalCodes.add(3);
        m_request.m_reqID = 0x2f3e;
        m_request.setFatalResponseCodes(fatalCodes);
        try {
            m_request.verifyResponse(nxDomainResponseBytes, nxDomainResponseBytes.length);
        } catch (IOException ioe) {
            assertEquals("Non-Existent Domain (3)", ioe.getMessage());
            return;
        }
        throw new Exception("Should have caught an IOException for NXDomain!");
    }
}